Samsung released their exFAT (and FAT12/16/32) driver under the GPLv2, it is based on the in-kernel FAT driver and can be obtained from [1]. This patch adds version 1.2.4 of the exfat driver, sans the ifdefs for older kernel versions and ported to Linux 3.11. [1] http://opensource.samsung.com search for exfat original authors: Joosun Hahn Sung-Kwan Kim Signed-off-by: Benjamin Valentin <benpicco@xxxxxxxxxxxxxxxxxx> --- drivers/staging/Kconfig | 2 + drivers/staging/Makefile | 1 + drivers/staging/exfat/Kconfig | 25 + drivers/staging/exfat/Makefile | 10 + drivers/staging/exfat/TODO | 3 + drivers/staging/exfat/exfat.c | 4941 +++++++++++++++++++++++++++++++++ drivers/staging/exfat/exfat.h | 613 ++++ drivers/staging/exfat/exfat_api.c | 458 +++ drivers/staging/exfat/exfat_api.h | 164 ++ drivers/staging/exfat/exfat_blkdev.c | 155 ++ drivers/staging/exfat/exfat_blkdev.h | 45 + drivers/staging/exfat/exfat_cache.c | 741 +++++ drivers/staging/exfat/exfat_cache.h | 62 + drivers/staging/exfat/exfat_data.c | 39 + drivers/staging/exfat/exfat_data.h | 48 + drivers/staging/exfat/exfat_global.c | 118 + drivers/staging/exfat/exfat_global.h | 126 + drivers/staging/exfat/exfat_nls.c | 353 +++ drivers/staging/exfat/exfat_nls.h | 69 + drivers/staging/exfat/exfat_oal.c | 156 ++ drivers/staging/exfat/exfat_oal.h | 48 + drivers/staging/exfat/exfat_part.h | 56 + drivers/staging/exfat/exfat_super.c | 2009 ++++++++++++++ drivers/staging/exfat/exfat_super.h | 153 + drivers/staging/exfat/exfat_upcase.c | 389 +++ drivers/staging/exfat/exfat_version.h | 1 + 26 files changed, 10785 insertions(+) create mode 100644 drivers/staging/exfat/Kconfig create mode 100644 drivers/staging/exfat/Makefile create mode 100644 drivers/staging/exfat/TODO create mode 100644 drivers/staging/exfat/exfat.c create mode 100644 drivers/staging/exfat/exfat.h create mode 100644 drivers/staging/exfat/exfat_api.c create mode 100644 drivers/staging/exfat/exfat_api.h create mode 100644 drivers/staging/exfat/exfat_blkdev.c create mode 100644 drivers/staging/exfat/exfat_blkdev.h create mode 100644 drivers/staging/exfat/exfat_cache.c create mode 100644 drivers/staging/exfat/exfat_cache.h create mode 100644 drivers/staging/exfat/exfat_data.c create mode 100644 drivers/staging/exfat/exfat_data.h create mode 100644 drivers/staging/exfat/exfat_global.c create mode 100644 drivers/staging/exfat/exfat_global.h create mode 100644 drivers/staging/exfat/exfat_nls.c create mode 100644 drivers/staging/exfat/exfat_nls.h create mode 100644 drivers/staging/exfat/exfat_oal.c create mode 100644 drivers/staging/exfat/exfat_oal.h create mode 100644 drivers/staging/exfat/exfat_part.h create mode 100644 drivers/staging/exfat/exfat_super.c create mode 100644 drivers/staging/exfat/exfat_super.h create mode 100644 drivers/staging/exfat/exfat_upcase.c create mode 100644 drivers/staging/exfat/exfat_version.h diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig index 57d8b34..d4c3b4b 100644 --- a/drivers/staging/Kconfig +++ b/drivers/staging/Kconfig @@ -142,4 +142,6 @@ source "drivers/staging/lustre/Kconfig" source "drivers/staging/btmtk_usb/Kconfig" +source "drivers/staging/exfat/Kconfig" + endif # STAGING diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile index 429321f..370e314 100644 --- a/drivers/staging/Makefile +++ b/drivers/staging/Makefile @@ -63,3 +63,4 @@ obj-$(CONFIG_GOLDFISH) += goldfish/ obj-$(CONFIG_USB_DWC2) += dwc2/ obj-$(CONFIG_LUSTRE_FS) += lustre/ obj-$(CONFIG_USB_BTMTK) += btmtk_usb/ +obj-$(CONFIG_EXFAT_FS) += exfat/ diff --git a/drivers/staging/exfat/Kconfig b/drivers/staging/exfat/Kconfig new file mode 100644 index 0000000..1f91227 --- /dev/null +++ b/drivers/staging/exfat/Kconfig @@ -0,0 +1,25 @@ +config EXFAT_FS + tristate "exFAT fs support" + select NLS + help + This adds the exFAT file system + +if EXFAT_FS + +config EXFAT_LITTLE_ENDIAN + bool "Little Endian Mode" + default y + +config EXFAT_DISCARD + bool "enable discard" + default y + +config EXFAT_KERNEL_DEBUG + bool "enable debugging" + default y + +config EXFAT_DEBUG_MSG + bool "print debug messages" + default n + +endif # EXFAT_FS diff --git a/drivers/staging/exfat/Makefile b/drivers/staging/exfat/Makefile new file mode 100644 index 0000000..d7fabfa --- /dev/null +++ b/drivers/staging/exfat/Makefile @@ -0,0 +1,10 @@ +# +# Makefile for the Linux fat filesystem support. +# + +obj-$(CONFIG_EXFAT_FS) += exfat_core.o exfat_fs.o + +exfat_fs-y := exfat_super.o + +exfat_core-y := exfat.o exfat_api.o exfat_blkdev.o exfat_cache.o \ + exfat_data.o exfat_global.o exfat_nls.o exfat_oal.o exfat_upcase.o diff --git a/drivers/staging/exfat/TODO b/drivers/staging/exfat/TODO new file mode 100644 index 0000000..707310a --- /dev/null +++ b/drivers/staging/exfat/TODO @@ -0,0 +1,3 @@ +* fix coding style +* remove dead code +* merge with existing FAT implementation diff --git a/drivers/staging/exfat/exfat.c b/drivers/staging/exfat/exfat.c new file mode 100644 index 0000000..c8f9719 --- /dev/null +++ b/drivers/staging/exfat/exfat.c @@ -0,0 +1,4941 @@ +/* Some of the source code in this file came from "linux/fs/fat/misc.c". */ +/* + * linux/fs/fat/misc.c + * + * Written 1992,1993 by Werner Almesberger + * 22/11/2000 - Fixed fat_date_unix2dos for dates earlier than 01/01/1980 + * and date_dos2unix for date==0 by Igor Zhbanov(bsg@xxxxxxxxxxxx) + */ + +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include <linux/version.h> + +#include "exfat_global.h" +#include "exfat_data.h" +#include "exfat_oal.h" + +#include "exfat_blkdev.h" +#include "exfat_cache.h" +#include "exfat_nls.h" +#include "exfat_api.h" +#include "exfat_super.h" +#include "exfat.h" + +#include <linux/blkdev.h> + +#define THERE_IS_MBR 0 + +#if (THERE_IS_MBR == 1) +#include "exfat_part.h" +#endif + +#define DELAYED_SYNC 0 + +#define ELAPSED_TIME 0 + +#if (ELAPSED_TIME == 1) +#include <linux/time.h> + +static UINT32 __t1, __t2; +static UINT32 get_current_msec(void) +{ + struct timeval tm; + do_gettimeofday(&tm); + return (UINT32)(tm.tv_sec*1000000 + tm.tv_usec); +} +#define TIME_START() do {__t1 = get_current_msec(); } while (0) +#define TIME_END() do {__t2 = get_current_msec(); } while (0) +#define PRINT_TIME(n) do {printk("[EXFAT] Elapsed time %d = %d (usec)\n", n, (__t2 - __t1)); } while (0) +#else +#define TIME_START() +#define TIME_END() +#define PRINT_TIME(n) +#endif + +static void __set_sb_dirty(struct super_block *sb) +{ + struct exfat_sb_info *sbi = EXFAT_SB(sb); + sbi->s_dirt = 1; +} + +extern UINT8 uni_upcase[]; + +static UINT8 name_buf[MAX_PATH_LENGTH *MAX_CHARSET_SIZE]; + +static INT8 *reserved_names[] = { + "AUX ", "CON ", "NUL ", "PRN ", + "COM1 ", "COM2 ", "COM3 ", "COM4 ", + "COM5 ", "COM6 ", "COM7 ", "COM8 ", "COM9 ", + "LPT1 ", "LPT2 ", "LPT3 ", "LPT4 ", + "LPT5 ", "LPT6 ", "LPT7 ", "LPT8 ", "LPT9 ", + NULL +}; + +static UINT8 free_bit[] = { + 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, + 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, 0, 1, 0, 2, 0, 1, 0, 3, + 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, + 0, 1, 0, 6, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, + 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, 0, 1, 0, 2, + 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, + 0, 1, 0, 2, 0, 1, 0, 7, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, + 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, + 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, + 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 6, 0, 1, 0, 2, 0, 1, 0, 3, + 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, + 0, 1, 0, 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, + 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0 +}; + +static UINT8 used_bit[] = { + 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1, 2, 2, 3, + 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 1, 2, 2, 3, 2, 3, 3, 4, + 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, + 4, 5, 5, 6, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2, 3, 3, 4, + 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, + 4, 5, 5, 6, 5, 6, 6, 7, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, + 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, + 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 2, 3, 3, 4, 3, 4, 4, 5, + 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, + 5, 6, 6, 7, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, + 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 +}; + +INT32 ffsInit(void) +{ + INT32 ret; + + ret = bdev_init(); + if (ret) + return ret; + + ret = fs_init(); + if (ret) + return ret; + + return FFS_SUCCESS; +} + +INT32 ffsShutdown(void) +{ + INT32 ret; + ret = fs_shutdown(); + if (ret) + return ret; + + ret = bdev_shutdown(); + if (ret) + return ret; + + return FFS_SUCCESS; +} + +INT32 ffsMountVol(struct super_block *sb, INT32 drv) +{ + INT32 i, ret; +#if (THERE_IS_MBR == 1) + MBR_SECTOR_T *p_mbr; + PART_ENTRY_T *p_pte; +#endif + PBR_SECTOR_T *p_pbr; + struct buffer_head *tmp_bh = NULL; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + printk("[EXFAT] trying to mount...\n"); + + p_fs->drv = drv; + p_fs->dev_ejected = FALSE; + + if (bdev_open(sb)) + return FFS_MEDIAERR; + + if (p_bd->sector_size < sb->s_blocksize) + return FFS_MEDIAERR; + if (p_bd->sector_size > sb->s_blocksize) + sb_set_blocksize(sb, p_bd->sector_size); + + if (sector_read(sb, 0, &tmp_bh, 1) != FFS_SUCCESS) + return FFS_MEDIAERR; + +#if (THERE_IS_MBR == 1) + if (buf[0] != 0xEB) { + p_mbr = (MBR_SECTOR_T *) tmp_bh->b_data; + + if (GET16_A(p_mbr->signature) != MBR_SIGNATURE) { + brelse(tmp_bh); + bdev_close(sb); + return FFS_FORMATERR; + } + + p_pte = (PART_ENTRY_T *) p_mbr->partition + 0; + p_fs->PBR_sector = GET32(p_pte->start_sector); + p_fs->num_sectors = GET32(p_pte->num_sectors); + + if (p_fs->num_sectors == 0) { + brelse(tmp_bh); + bdev_close(sb); + return FFS_ERROR; + } + + if (sector_read(sb, p_fs->PBR_sector, &tmp_bh, 1) != FFS_SUCCESS) { + bdev_close(sb); + return FFS_MEDIAERR; + } + } else { +#endif + p_fs->PBR_sector = 0; +#if (THERE_IS_MBR == 1) + } +#endif + + p_pbr = (PBR_SECTOR_T *) tmp_bh->b_data; + + if (GET16_A(p_pbr->signature) != PBR_SIGNATURE) { + brelse(tmp_bh); + bdev_close(sb); + return FFS_FORMATERR; + } + + for (i = 0; i < 53; i++) + if (p_pbr->bpb[i]) + break; + + if (i < 53) { + if (GET16(p_pbr->bpb+11)) + ret = fat16_mount(sb, p_pbr); + else + ret = fat32_mount(sb, p_pbr); + } else { + ret = exfat_mount(sb, p_pbr); + } + + brelse(tmp_bh); + + if (ret) { + bdev_close(sb); + return ret; + } + + if (p_fs->vol_type == EXFAT) { + ret = load_alloc_bitmap(sb); + if (ret) { + bdev_close(sb); + return ret; + } + ret = load_upcase_table(sb); + if (ret) { + free_alloc_bitmap(sb); + bdev_close(sb); + return ret; + } + } + + if (p_fs->dev_ejected) { + if (p_fs->vol_type == EXFAT) { + free_upcase_table(sb); + free_alloc_bitmap(sb); + } + bdev_close(sb); + return FFS_MEDIAERR; + } + + printk("[EXFAT] mounted successfully\n"); + + return FFS_SUCCESS; +} + +INT32 ffsUmountVol(struct super_block *sb) +{ + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + printk("[EXFAT] trying to unmount...\n"); + + fs_sync(sb, 0); + fs_set_vol_flags(sb, VOL_CLEAN); + + if (p_fs->vol_type == EXFAT) { + free_upcase_table(sb); + free_alloc_bitmap(sb); + } + + FAT_release_all(sb); + buf_release_all(sb); + + bdev_close(sb); + + if (p_fs->dev_ejected) { + printk( "[EXFAT] unmounted with media errors. " + "device's already ejected.\n"); + return FFS_MEDIAERR; + } + + printk("[EXFAT] unmounted successfully\n"); + + return FFS_SUCCESS; +} + +INT32 ffsGetVolInfo(struct super_block *sb, VOL_INFO_T *info) +{ + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (p_fs->used_clusters == (UINT32) ~0) + p_fs->used_clusters = p_fs->fs_func->count_used_clusters(sb); + + info->FatType = p_fs->vol_type; + info->ClusterSize = p_fs->cluster_size; + info->NumClusters = p_fs->num_clusters - 2; + info->UsedClusters = p_fs->used_clusters; + info->FreeClusters = info->NumClusters - info->UsedClusters; + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return FFS_SUCCESS; +} + +INT32 ffsSyncVol(struct super_block *sb, INT32 do_sync) +{ + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + fs_sync(sb, do_sync); + fs_set_vol_flags(sb, VOL_CLEAN); + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return FFS_SUCCESS; +} + +INT32 ffsLookupFile(struct inode *inode, UINT8 *path, FILE_ID_T *fid) +{ + INT32 ret, dentry, num_entries; + CHAIN_T dir; + UNI_NAME_T uni_name; + DOS_NAME_T dos_name; + DENTRY_T *ep, *ep2; + ENTRY_SET_CACHE_T *es=NULL; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + PRINTK("ffsLookupFile entered\n"); + + ret = resolve_path(inode, path, &dir, &uni_name); + if (ret) + return ret; + + ret = get_num_entries_and_dos_name(sb, &dir, &uni_name, &num_entries, &dos_name); + if (ret) + return ret; + + dentry = p_fs->fs_func->find_dir_entry(sb, &dir, &uni_name, num_entries, &dos_name, TYPE_ALL); + if (dentry < -1) + return FFS_NOTFOUND; + + fid->dir.dir = dir.dir; + fid->dir.size = dir.size; + fid->dir.flags = dir.flags; + fid->entry = dentry; + + if (dentry == -1) { + fid->type = TYPE_DIR; + fid->rwoffset = 0; + fid->hint_last_off = -1; + + fid->attr = ATTR_SUBDIR; + fid->flags = 0x01; + fid->size = 0; + fid->start_clu = p_fs->root_dir; + } else { + if (p_fs->vol_type == EXFAT) { + es = get_entry_set_in_dir(sb, &dir, dentry, ES_2_ENTRIES, &ep); + if (!es) + return FFS_MEDIAERR; + ep2 = ep+1; + } else { + ep = get_entry_in_dir(sb, &dir, dentry, NULL); + if (!ep) + return FFS_MEDIAERR; + ep2 = ep; + } + + fid->type = p_fs->fs_func->get_entry_type(ep); + fid->rwoffset = 0; + fid->hint_last_off = -1; + fid->attr = p_fs->fs_func->get_entry_attr(ep); + + fid->size = p_fs->fs_func->get_entry_size(ep2); + if ((fid->type == TYPE_FILE) && (fid->size == 0)) { + fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01; + fid->start_clu = CLUSTER_32(~0); + } else { + fid->flags = p_fs->fs_func->get_entry_flag(ep2); + fid->start_clu = p_fs->fs_func->get_entry_clu0(ep2); + } + + if (p_fs->vol_type == EXFAT) + release_entry_set(es); + } + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + PRINTK("ffsLookupFile exited successfully\n"); + + return FFS_SUCCESS; +} + +INT32 ffsCreateFile(struct inode *inode, UINT8 *path, UINT8 mode, FILE_ID_T *fid) +{ + INT32 ret; + CHAIN_T dir; + UNI_NAME_T uni_name; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + ret = resolve_path(inode, path, &dir, &uni_name); + if (ret) + return ret; + + fs_set_vol_flags(sb, VOL_DIRTY); + ret = create_file(inode, &dir, &uni_name, mode, fid); + +#if (DELAYED_SYNC == 0) + fs_sync(sb, 0); + fs_set_vol_flags(sb, VOL_CLEAN); +#endif + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return ret; +} + +INT32 ffsReadFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 count, UINT64 *rcount) +{ + INT32 offset, sec_offset, clu_offset; + UINT32 clu, LogSector; + UINT64 oneblkread, read_bytes; + struct buffer_head *tmp_bh = NULL; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + if (fid->type != TYPE_FILE) + return FFS_PERMISSIONERR; + + if (fid->rwoffset > fid->size) + fid->rwoffset = fid->size; + + if (count > (fid->size - fid->rwoffset)) + count = fid->size - fid->rwoffset; + + if (count == 0) { + if (rcount != NULL) + *rcount = 0; + return FFS_EOF; + } + + read_bytes = 0; + + while (count > 0) { + clu_offset = (INT32)(fid->rwoffset >> p_fs->cluster_size_bits); + clu = fid->start_clu; + + if (fid->flags == 0x03) { + clu += clu_offset; + } else { + if ((clu_offset > 0) && (fid->hint_last_off > 0) && + (clu_offset >= fid->hint_last_off)) { + clu_offset -= fid->hint_last_off; + clu = fid->hint_last_clu; + } + + while (clu_offset > 0) { + if (FAT_read(sb, clu, &clu) == -1) + return FFS_MEDIAERR; + + clu_offset--; + } + } + + fid->hint_last_off = (INT32)(fid->rwoffset >> p_fs->cluster_size_bits); + fid->hint_last_clu = clu; + + offset = (INT32)(fid->rwoffset & (p_fs->cluster_size-1)); + sec_offset = offset >> p_bd->sector_size_bits; + offset &= p_bd->sector_size_mask; + + LogSector = START_SECTOR(clu) + sec_offset; + + oneblkread = (UINT64)(p_bd->sector_size - offset); + if (oneblkread > count) + oneblkread = count; + + if ((offset == 0) && (oneblkread == p_bd->sector_size)) { + if (sector_read(sb, LogSector, &tmp_bh, 1) != FFS_SUCCESS) + goto err_out; + MEMCPY(((INT8 *) buffer)+read_bytes, ((INT8 *) tmp_bh->b_data), (INT32) oneblkread); + } else { + if (sector_read(sb, LogSector, &tmp_bh, 1) != FFS_SUCCESS) + goto err_out; + MEMCPY(((INT8 *) buffer)+read_bytes, ((INT8 *) tmp_bh->b_data)+offset, (INT32) oneblkread); + } + count -= oneblkread; + read_bytes += oneblkread; + fid->rwoffset += oneblkread; + } + brelse(tmp_bh); + +err_out: + if (rcount != NULL) + *rcount = read_bytes; + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return FFS_SUCCESS; +} + +INT32 ffsWriteFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 count, UINT64 *wcount) +{ + INT32 modified = FALSE, offset, sec_offset, clu_offset; + INT32 num_clusters, num_alloc, num_alloced = (INT32) ~0; + UINT32 clu, last_clu, LogSector, sector; + UINT64 oneblkwrite, write_bytes; + CHAIN_T new_clu; + TIMESTAMP_T tm; + DENTRY_T *ep, *ep2; + ENTRY_SET_CACHE_T *es = NULL; + struct buffer_head *tmp_bh = NULL; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + if (fid->type != TYPE_FILE) + return FFS_PERMISSIONERR; + + if (fid->rwoffset > fid->size) + fid->rwoffset = fid->size; + + if (count == 0) { + if (wcount != NULL) + *wcount = 0; + return FFS_SUCCESS; + } + + fs_set_vol_flags(sb, VOL_DIRTY); + + if (fid->size == 0) + num_clusters = 0; + else + num_clusters = (INT32)((fid->size-1) >> p_fs->cluster_size_bits) + 1; + + write_bytes = 0; + + while (count > 0) { + clu_offset = (INT32)(fid->rwoffset >> p_fs->cluster_size_bits); + clu = last_clu = fid->start_clu; + + if (fid->flags == 0x03) { + if ((clu_offset > 0) && (clu != CLUSTER_32(~0))) { + last_clu += clu_offset - 1; + + if (clu_offset == num_clusters) + clu = CLUSTER_32(~0); + else + clu += clu_offset; + } + } else { + if ((clu_offset > 0) && (fid->hint_last_off > 0) && + (clu_offset >= fid->hint_last_off)) { + clu_offset -= fid->hint_last_off; + clu = fid->hint_last_clu; + } + + while ((clu_offset > 0) && (clu != CLUSTER_32(~0))) { + last_clu = clu; + if (FAT_read(sb, clu, &clu) == -1) + return FFS_MEDIAERR; + + clu_offset--; + } + } + + if (clu == CLUSTER_32(~0)) { + num_alloc = (INT32)((count-1) >> p_fs->cluster_size_bits) + 1; + new_clu.dir = (last_clu == CLUSTER_32(~0)) ? CLUSTER_32(~0) : last_clu+1; + new_clu.size = 0; + new_clu.flags = fid->flags; + + num_alloced = p_fs->fs_func->alloc_cluster(sb, num_alloc, &new_clu); + if (num_alloced == 0) + break; + + if (last_clu == CLUSTER_32(~0)) { + if (new_clu.flags == 0x01) + fid->flags = 0x01; + fid->start_clu = new_clu.dir; + modified = TRUE; + } else { + if (new_clu.flags != fid->flags) { + exfat_chain_cont_cluster(sb, fid->start_clu, num_clusters); + fid->flags = 0x01; + modified = TRUE; + } + if (new_clu.flags == 0x01) + FAT_write(sb, last_clu, new_clu.dir); + } + + num_clusters += num_alloced; + clu = new_clu.dir; + } + + fid->hint_last_off = (INT32)(fid->rwoffset >> p_fs->cluster_size_bits); + fid->hint_last_clu = clu; + + offset = (INT32)(fid->rwoffset & (p_fs->cluster_size-1)); + sec_offset = offset >> p_bd->sector_size_bits; + offset &= p_bd->sector_size_mask; + + LogSector = START_SECTOR(clu) + sec_offset; + + oneblkwrite = (UINT64)(p_bd->sector_size - offset); + if (oneblkwrite > count) + oneblkwrite = count; + + if ((offset == 0) && (oneblkwrite == p_bd->sector_size)) { + if (sector_read(sb, LogSector, &tmp_bh, 0) != FFS_SUCCESS) + goto err_out; + MEMCPY(((INT8 *) tmp_bh->b_data), ((INT8 *) buffer)+write_bytes, (INT32) oneblkwrite); + if (sector_write(sb, LogSector, tmp_bh, 0) != FFS_SUCCESS) { + brelse(tmp_bh); + goto err_out; + } + } else { + if ((offset > 0) || ((fid->rwoffset+oneblkwrite) < fid->size)) { + if (sector_read(sb, LogSector, &tmp_bh, 1) != FFS_SUCCESS) + goto err_out; + } else { + if (sector_read(sb, LogSector, &tmp_bh, 0) != FFS_SUCCESS) + goto err_out; + } + + MEMCPY(((INT8 *) tmp_bh->b_data)+offset, ((INT8 *) buffer)+write_bytes, (INT32) oneblkwrite); + if (sector_write(sb, LogSector, tmp_bh, 0) != FFS_SUCCESS) { + brelse(tmp_bh); + goto err_out; + } + } + + count -= oneblkwrite; + write_bytes += oneblkwrite; + fid->rwoffset += oneblkwrite; + + fid->attr |= ATTR_ARCHIVE; + + if (fid->size < fid->rwoffset) { + fid->size = fid->rwoffset; + modified = TRUE; + } + } + + brelse(tmp_bh); + + if (p_fs->vol_type == EXFAT) { + es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry, ES_ALL_ENTRIES, &ep); + if (es == NULL) + goto err_out; + ep2 = ep+1; + } else { + ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, §or); + if (!ep) + goto err_out; + ep2 = ep; + } + + p_fs->fs_func->set_entry_time(ep, tm_current(&tm), TM_MODIFY); + p_fs->fs_func->set_entry_attr(ep, fid->attr); + + if (p_fs->vol_type != EXFAT) + buf_modify(sb, sector); + + if (modified) { + if (p_fs->fs_func->get_entry_flag(ep2) != fid->flags) + p_fs->fs_func->set_entry_flag(ep2, fid->flags); + + if (p_fs->fs_func->get_entry_size(ep2) != fid->size) + p_fs->fs_func->set_entry_size(ep2, fid->size); + + if (p_fs->fs_func->get_entry_clu0(ep2) != fid->start_clu) + p_fs->fs_func->set_entry_clu0(ep2, fid->start_clu); + + if (p_fs->vol_type != EXFAT) + buf_modify(sb, sector); + } + + if (p_fs->vol_type == EXFAT) { + update_dir_checksum_with_entry_set(sb, es); + release_entry_set(es); + } + +#if (DELAYED_SYNC == 0) + fs_sync(sb, 0); + fs_set_vol_flags(sb, VOL_CLEAN); +#endif + +err_out: + if (wcount != NULL) + *wcount = write_bytes; + + if (num_alloced == 0) + return FFS_FULL; + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return FFS_SUCCESS; +} + +INT32 ffsTruncateFile(struct inode *inode, UINT64 old_size, UINT64 new_size) +{ + INT32 num_clusters; + UINT32 last_clu = CLUSTER_32(0), sector; + CHAIN_T clu; + TIMESTAMP_T tm; + DENTRY_T *ep, *ep2; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + FILE_ID_T *fid = &(EXFAT_I(inode)->fid); + ENTRY_SET_CACHE_T *es=NULL; + + if (fid->type != TYPE_FILE) + return FFS_PERMISSIONERR; + + if (fid->size != old_size) { + printk(KERN_ERR "[EXFAT] truncate : can't skip it because of " + "size-mismatch(old:%lld->fid:%lld).\n" + ,old_size, fid->size); + } + + if (old_size <= new_size) + return FFS_SUCCESS; + + fs_set_vol_flags(sb, VOL_DIRTY); + + clu.dir = fid->start_clu; + clu.size = (INT32)((old_size-1) >> p_fs->cluster_size_bits) + 1; + clu.flags = fid->flags; + + if (new_size > 0) { + num_clusters = (INT32)((new_size-1) >> p_fs->cluster_size_bits) + 1; + + if (clu.flags == 0x03) { + clu.dir += num_clusters; + } else { + while (num_clusters > 0) { + last_clu = clu.dir; + if (FAT_read(sb, clu.dir, &(clu.dir)) == -1) + return FFS_MEDIAERR; + num_clusters--; + } + } + + clu.size -= num_clusters; + } + + fid->size = new_size; + fid->attr |= ATTR_ARCHIVE; + if (new_size == 0) { + fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01; + fid->start_clu = CLUSTER_32(~0); + } + + if (p_fs->vol_type == EXFAT) { + es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry, ES_ALL_ENTRIES, &ep); + if (es == NULL) + return FFS_MEDIAERR; + ep2 = ep+1; + } else { + ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, §or); + if (!ep) + return FFS_MEDIAERR; + ep2 = ep; + } + + p_fs->fs_func->set_entry_time(ep, tm_current(&tm), TM_MODIFY); + p_fs->fs_func->set_entry_attr(ep, fid->attr); + + p_fs->fs_func->set_entry_size(ep2, new_size); + if (new_size == 0) { + p_fs->fs_func->set_entry_flag(ep2, 0x01); + p_fs->fs_func->set_entry_clu0(ep2, CLUSTER_32(0)); + } + + if (p_fs->vol_type != EXFAT) + buf_modify(sb, sector); + else { + update_dir_checksum_with_entry_set(sb, es); + release_entry_set(es); + } + + if (last_clu != CLUSTER_32(0)) { + if (fid->flags == 0x01) + FAT_write(sb, last_clu, CLUSTER_32(~0)); + } + + p_fs->fs_func->free_cluster(sb, &clu, 0); + + fid->hint_last_off = -1; + if (fid->rwoffset > fid->size) { + fid->rwoffset = fid->size; + } + +#if (DELAYED_SYNC == 0) + fs_sync(sb, 0); + fs_set_vol_flags(sb, VOL_CLEAN); +#endif + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return FFS_SUCCESS; +} + +static void update_parent_info( FILE_ID_T *fid, struct inode *parent_inode) +{ + FS_INFO_T *p_fs = &(EXFAT_SB(parent_inode->i_sb)->fs_info); + FILE_ID_T *parent_fid = &(EXFAT_I(parent_inode)->fid); + + if (unlikely((parent_fid->flags != fid->dir.flags) + || (parent_fid->size != (fid->dir.size<<p_fs->cluster_size_bits)) + || (parent_fid->start_clu != fid->dir.dir))) { + + fid->dir.dir = parent_fid->start_clu; + fid->dir.flags = parent_fid->flags; + fid->dir.size = ((parent_fid->size + (p_fs->cluster_size-1)) + >> p_fs->cluster_size_bits); + } +} + +INT32 ffsMoveFile(struct inode *old_parent_inode, FILE_ID_T *fid, struct inode *new_parent_inode, struct dentry *new_dentry) +{ + INT32 ret; + INT32 dentry; + CHAIN_T olddir, newdir; + CHAIN_T *p_dir=NULL; + UNI_NAME_T uni_name; + DENTRY_T *ep; + struct super_block *sb = old_parent_inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + UINT8 *new_path = (UINT8 *) new_dentry->d_name.name; + struct inode *new_inode = new_dentry->d_inode; + int num_entries; + FILE_ID_T *new_fid = NULL; + INT32 new_entry=0; + + if ((new_path == NULL) || (STRLEN(new_path) == 0)) + return FFS_ERROR; + + update_parent_info(fid, old_parent_inode); + + olddir.dir = fid->dir.dir; + olddir.size = fid->dir.size; + olddir.flags = fid->dir.flags; + + dentry = fid->entry; + + if (p_fs->vol_type != EXFAT) { + if ((olddir.dir != p_fs->root_dir) && (dentry < 2)) + return FFS_PERMISSIONERR; + } + + ep = get_entry_in_dir(sb, &olddir, dentry, NULL); + if (!ep) + return FFS_MEDIAERR; + + if (p_fs->fs_func->get_entry_attr(ep) & ATTR_READONLY) + return FFS_PERMISSIONERR; + + if (new_inode) { + UINT32 entry_type; + + ret = FFS_MEDIAERR; + new_fid = &EXFAT_I(new_inode)->fid; + + update_parent_info(new_fid, new_parent_inode); + + p_dir = &(new_fid->dir); + new_entry = new_fid->entry; + ep = get_entry_in_dir(sb, p_dir, new_entry, NULL); + if (!ep) + goto out; + + entry_type = p_fs->fs_func->get_entry_type(ep); + + if (entry_type == TYPE_DIR) { + CHAIN_T new_clu; + new_clu.dir = new_fid->start_clu; + new_clu.size = (INT32)((new_fid->size-1) >> p_fs->cluster_size_bits) + 1; + new_clu.flags = new_fid->flags; + + if (!is_dir_empty(sb, &new_clu)) + return FFS_FILEEXIST; + } + } + + ret = resolve_path(new_parent_inode, new_path, &newdir, &uni_name); + if (ret) + return ret; + + fs_set_vol_flags(sb, VOL_DIRTY); + + if (olddir.dir == newdir.dir) + ret = rename_file(new_parent_inode, &olddir, dentry, &uni_name, fid); + else + ret = move_file(new_parent_inode, &olddir, dentry, &newdir, &uni_name, fid); + + if ((ret == FFS_SUCCESS) && new_inode) { + ep = get_entry_in_dir(sb, p_dir, new_entry, NULL); + if (!ep) + goto out; + + num_entries = p_fs->fs_func->count_ext_entries(sb, p_dir, new_entry, ep); + if (num_entries < 0) + goto out; + p_fs->fs_func->delete_dir_entry(sb, p_dir, new_entry, 0, num_entries+1); + } +out: +#if (DELAYED_SYNC == 0) + fs_sync(sb, 0); + fs_set_vol_flags(sb, VOL_CLEAN); +#endif + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return ret; +} + +INT32 ffsRemoveFile(struct inode *inode, FILE_ID_T *fid) +{ + INT32 dentry; + CHAIN_T dir, clu_to_free; + DENTRY_T *ep; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + dir.dir = fid->dir.dir; + dir.size = fid->dir.size; + dir.flags = fid->dir.flags; + + dentry = fid->entry; + + ep = get_entry_in_dir(sb, &dir, dentry, NULL); + if (!ep) + return FFS_MEDIAERR; + + if (p_fs->fs_func->get_entry_attr(ep) & ATTR_READONLY) + return FFS_PERMISSIONERR; + + fs_set_vol_flags(sb, VOL_DIRTY); + + remove_file(inode, &dir, dentry); + + clu_to_free.dir = fid->start_clu; + clu_to_free.size = (INT32)((fid->size-1) >> p_fs->cluster_size_bits) + 1; + clu_to_free.flags = fid->flags; + + p_fs->fs_func->free_cluster(sb, &clu_to_free, 0); + + + fid->size = 0; + fid->start_clu = CLUSTER_32(~0); + fid->flags = (p_fs->vol_type == EXFAT)? 0x03: 0x01; + +#if (DELAYED_SYNC == 0) + fs_sync(sb, 0); + fs_set_vol_flags(sb, VOL_CLEAN); +#endif + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return FFS_SUCCESS; +} + +INT32 ffsSetAttr(struct inode *inode, UINT32 attr) +{ + UINT32 type, sector; + DENTRY_T *ep; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + FILE_ID_T *fid = &(EXFAT_I(inode)->fid); + UINT8 is_dir = (fid->type == TYPE_DIR) ? 1 : 0; + ENTRY_SET_CACHE_T *es = NULL; + + if (fid->attr == attr) { + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + return FFS_SUCCESS; + } + + if (is_dir) { + if ((fid->dir.dir == p_fs->root_dir) && + (fid->entry == -1)) { + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + return FFS_SUCCESS; + } + } + + if (p_fs->vol_type == EXFAT) { + es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry, ES_ALL_ENTRIES, &ep); + if (es == NULL) + return FFS_MEDIAERR; + } else { + ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, §or); + if (!ep) + return FFS_MEDIAERR; + } + + type = p_fs->fs_func->get_entry_type(ep); + + if (((type == TYPE_FILE) && (attr & ATTR_SUBDIR)) || + ((type == TYPE_DIR) && (!(attr & ATTR_SUBDIR)))) { + INT32 err; + if (p_fs->dev_ejected) + err = FFS_MEDIAERR; + else + err = FFS_ERROR; + + if (p_fs->vol_type == EXFAT) + release_entry_set(es); + return err; + } + + fs_set_vol_flags(sb, VOL_DIRTY); + + fid->attr = attr; + p_fs->fs_func->set_entry_attr(ep, attr); + + if (p_fs->vol_type != EXFAT) + buf_modify(sb, sector); + else { + update_dir_checksum_with_entry_set(sb, es); + release_entry_set(es); + } + +#if (DELAYED_SYNC == 0) + fs_sync(sb, 0); + fs_set_vol_flags(sb, VOL_CLEAN); +#endif + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return FFS_SUCCESS; +} + +INT32 ffsGetStat(struct inode *inode, DIR_ENTRY_T *info) +{ + UINT32 sector; + INT32 count; + CHAIN_T dir; + UNI_NAME_T uni_name; + TIMESTAMP_T tm; + DENTRY_T *ep, *ep2; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + FILE_ID_T *fid = &(EXFAT_I(inode)->fid); + ENTRY_SET_CACHE_T *es=NULL; + UINT8 is_dir = (fid->type == TYPE_DIR) ? 1 : 0; + + PRINTK("ffsGetStat entered\n"); + + if (is_dir) { + if ((fid->dir.dir == p_fs->root_dir) && + (fid->entry == -1)) { + info->Attr = ATTR_SUBDIR; + MEMSET((INT8 *) &info->CreateTimestamp, 0, sizeof(DATE_TIME_T)); + MEMSET((INT8 *) &info->ModifyTimestamp, 0, sizeof(DATE_TIME_T)); + MEMSET((INT8 *) &info->AccessTimestamp, 0, sizeof(DATE_TIME_T)); + STRCPY(info->ShortName, "."); + STRCPY(info->Name, "."); + + dir.dir = p_fs->root_dir; + dir.flags = 0x01; + + if (p_fs->root_dir == CLUSTER_32(0)) + info->Size = p_fs->dentries_in_root << DENTRY_SIZE_BITS; + else + info->Size = count_num_clusters(sb, &dir) << p_fs->cluster_size_bits; + + count = count_dos_name_entries(sb, &dir, TYPE_DIR); + if (count < 0) + return FFS_MEDIAERR; + info->NumSubdirs = count; + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + return FFS_SUCCESS; + } + } + + if (p_fs->vol_type == EXFAT) { + es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry, ES_2_ENTRIES, &ep); + if (es == NULL) + return FFS_MEDIAERR; + ep2 = ep+1; + } else { + ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, §or); + if (!ep) + return FFS_MEDIAERR; + ep2 = ep; + buf_lock(sb, sector); + } + + info->Attr = p_fs->fs_func->get_entry_attr(ep); + + p_fs->fs_func->get_entry_time(ep, &tm, TM_CREATE); + info->CreateTimestamp.Year = tm.year; + info->CreateTimestamp.Month = tm.mon; + info->CreateTimestamp.Day = tm.day; + info->CreateTimestamp.Hour = tm.hour; + info->CreateTimestamp.Minute = tm.min; + info->CreateTimestamp.Second = tm.sec; + info->CreateTimestamp.MilliSecond = 0; + + p_fs->fs_func->get_entry_time(ep, &tm, TM_MODIFY); + info->ModifyTimestamp.Year = tm.year; + info->ModifyTimestamp.Month = tm.mon; + info->ModifyTimestamp.Day = tm.day; + info->ModifyTimestamp.Hour = tm.hour; + info->ModifyTimestamp.Minute = tm.min; + info->ModifyTimestamp.Second = tm.sec; + info->ModifyTimestamp.MilliSecond = 0; + + MEMSET((INT8 *) &info->AccessTimestamp, 0, sizeof(DATE_TIME_T)); + + *(uni_name.name) = 0x0; + p_fs->fs_func->get_uni_name_from_ext_entry(sb, &(fid->dir), fid->entry, uni_name.name); + if (*(uni_name.name) == 0x0) + get_uni_name_from_dos_entry(sb, (DOS_DENTRY_T *) ep, &uni_name, 0x1); + nls_uniname_to_cstring(sb, info->Name, &uni_name); + + if (p_fs->vol_type == EXFAT) { + info->NumSubdirs = 2; + } else { + buf_unlock(sb, sector); + get_uni_name_from_dos_entry(sb, (DOS_DENTRY_T *) ep, &uni_name, 0x0); + nls_uniname_to_cstring(sb, info->ShortName, &uni_name); + info->NumSubdirs = 0; + } + + info->Size = p_fs->fs_func->get_entry_size(ep2); + + if (p_fs->vol_type == EXFAT) + release_entry_set(es); + + if (is_dir) { + dir.dir = fid->start_clu; + dir.flags = 0x01; + + if (info->Size == 0) + info->Size = (UINT64) count_num_clusters(sb, &dir) << p_fs->cluster_size_bits; + + count = count_dos_name_entries(sb, &dir, TYPE_DIR); + if (count < 0) + return FFS_MEDIAERR; + info->NumSubdirs += count; + } + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + PRINTK("ffsGetStat exited successfully\n"); + return FFS_SUCCESS; +} + +INT32 ffsSetStat(struct inode *inode, DIR_ENTRY_T *info) +{ + UINT32 sector; + TIMESTAMP_T tm; + DENTRY_T *ep, *ep2; + ENTRY_SET_CACHE_T *es=NULL; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + FILE_ID_T *fid = &(EXFAT_I(inode)->fid); + UINT8 is_dir = (fid->type == TYPE_DIR) ? 1 : 0; + + if (is_dir) { + if ((fid->dir.dir == p_fs->root_dir) && + (fid->entry == -1)) { + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + return FFS_SUCCESS; + } + } + + fs_set_vol_flags(sb, VOL_DIRTY); + + if (p_fs->vol_type == EXFAT) { + es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry, ES_ALL_ENTRIES, &ep); + if (es == NULL) + return FFS_MEDIAERR; + ep2 = ep+1; + } else { + ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, §or); + if (!ep) + return FFS_MEDIAERR; + ep2 = ep; + } + + + p_fs->fs_func->set_entry_attr(ep, info->Attr); + + tm.sec = info->CreateTimestamp.Second; + tm.min = info->CreateTimestamp.Minute; + tm.hour = info->CreateTimestamp.Hour; + tm.day = info->CreateTimestamp.Day; + tm.mon = info->CreateTimestamp.Month; + tm.year = info->CreateTimestamp.Year; + p_fs->fs_func->set_entry_time(ep, &tm, TM_CREATE); + + tm.sec = info->ModifyTimestamp.Second; + tm.min = info->ModifyTimestamp.Minute; + tm.hour = info->ModifyTimestamp.Hour; + tm.day = info->ModifyTimestamp.Day; + tm.mon = info->ModifyTimestamp.Month; + tm.year = info->ModifyTimestamp.Year; + p_fs->fs_func->set_entry_time(ep, &tm, TM_MODIFY); + + + p_fs->fs_func->set_entry_size(ep2, info->Size); + + if (p_fs->vol_type != EXFAT) { + buf_modify(sb, sector); + } else { + update_dir_checksum_with_entry_set(sb, es); + release_entry_set(es); + } + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return FFS_SUCCESS; +} + +INT32 ffsMapCluster(struct inode *inode, INT32 clu_offset, UINT32 *clu) +{ + INT32 num_clusters, num_alloced, modified = FALSE; + UINT32 last_clu, sector; + CHAIN_T new_clu; + DENTRY_T *ep; + ENTRY_SET_CACHE_T *es = NULL; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + FILE_ID_T *fid = &(EXFAT_I(inode)->fid); + + fid->rwoffset = (INT64)(clu_offset) << p_fs->cluster_size_bits; + + if (EXFAT_I(inode)->mmu_private == 0) + num_clusters = 0; + else + num_clusters = (INT32)((EXFAT_I(inode)->mmu_private-1) >> p_fs->cluster_size_bits) + 1; + + *clu = last_clu = fid->start_clu; + + if (fid->flags == 0x03) { + if ((clu_offset > 0) && (*clu != CLUSTER_32(~0))) { + last_clu += clu_offset - 1; + + if (clu_offset == num_clusters) + *clu = CLUSTER_32(~0); + else + *clu += clu_offset; + } + } else { + if ((clu_offset > 0) && (fid->hint_last_off > 0) && + (clu_offset >= fid->hint_last_off)) { + clu_offset -= fid->hint_last_off; + *clu = fid->hint_last_clu; + } + + while ((clu_offset > 0) && (*clu != CLUSTER_32(~0))) { + last_clu = *clu; + if (FAT_read(sb, *clu, clu) == -1) + return FFS_MEDIAERR; + clu_offset--; + } + } + + if (*clu == CLUSTER_32(~0)) { + fs_set_vol_flags(sb, VOL_DIRTY); + + new_clu.dir = (last_clu == CLUSTER_32(~0)) ? CLUSTER_32(~0) : last_clu+1; + new_clu.size = 0; + new_clu.flags = fid->flags; + + num_alloced = p_fs->fs_func->alloc_cluster(sb, 1, &new_clu); + if (num_alloced < 1) + return FFS_FULL; + + if (last_clu == CLUSTER_32(~0)) { + if (new_clu.flags == 0x01) + fid->flags = 0x01; + fid->start_clu = new_clu.dir; + modified = TRUE; + } else { + if (new_clu.flags != fid->flags) { + exfat_chain_cont_cluster(sb, fid->start_clu, num_clusters); + fid->flags = 0x01; + modified = TRUE; + } + if (new_clu.flags == 0x01) + FAT_write(sb, last_clu, new_clu.dir); + } + + num_clusters += num_alloced; + *clu = new_clu.dir; + + if (p_fs->vol_type == EXFAT) { + es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry, ES_ALL_ENTRIES, &ep); + if (es == NULL) + return FFS_MEDIAERR; + ep++; + } + + if (modified) { + if (p_fs->vol_type != EXFAT) { + ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, §or); + if (!ep) + return FFS_MEDIAERR; + } + + if (p_fs->fs_func->get_entry_flag(ep) != fid->flags) + p_fs->fs_func->set_entry_flag(ep, fid->flags); + + if (p_fs->fs_func->get_entry_clu0(ep) != fid->start_clu) + p_fs->fs_func->set_entry_clu0(ep, fid->start_clu); + + if (p_fs->vol_type != EXFAT) + buf_modify(sb, sector); + } + + if (p_fs->vol_type == EXFAT) { + update_dir_checksum_with_entry_set(sb, es); + release_entry_set(es); + } + + inode->i_blocks += num_alloced << (p_fs->cluster_size_bits - 9); + } + + fid->hint_last_off = (INT32)(fid->rwoffset >> p_fs->cluster_size_bits); + fid->hint_last_clu = *clu; + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return FFS_SUCCESS; +} + +INT32 ffsCreateDir(struct inode *inode, UINT8 *path, FILE_ID_T *fid) +{ + INT32 ret; + CHAIN_T dir; + UNI_NAME_T uni_name; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + PRINTK("ffsCreateDir entered\n"); + + ret = resolve_path(inode, path, &dir, &uni_name); + if (ret) + return ret; + + fs_set_vol_flags(sb, VOL_DIRTY); + + ret = create_dir(inode, &dir, &uni_name, fid); + +#if (DELAYED_SYNC == 0) + fs_sync(sb, 0); + fs_set_vol_flags(sb, VOL_CLEAN); +#endif + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return ret; +} + +INT32 ffsReadDir(struct inode *inode, DIR_ENTRY_T *dir_entry) +{ + INT32 i, dentry, clu_offset; + INT32 dentries_per_clu, dentries_per_clu_bits = 0; + UINT32 type, sector; + CHAIN_T dir, clu; + UNI_NAME_T uni_name; + TIMESTAMP_T tm; + DENTRY_T *ep; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + FILE_ID_T *fid = &(EXFAT_I(inode)->fid); + + if (fid->type != TYPE_DIR) + return FFS_PERMISSIONERR; + + if (fid->entry == -1) { + dir.dir = p_fs->root_dir; + dir.flags = 0x01; + } else { + dir.dir = fid->start_clu; + dir.size = (INT32)(fid->size >> p_fs->cluster_size_bits); + dir.flags = fid->flags; + } + + dentry = (INT32) fid->rwoffset; + + if (dir.dir == CLUSTER_32(0)) { + dentries_per_clu = p_fs->dentries_in_root; + + if (dentry == dentries_per_clu) { + clu.dir = CLUSTER_32(~0); + } else { + clu.dir = dir.dir; + clu.size = dir.size; + clu.flags = dir.flags; + } + } else { + dentries_per_clu = p_fs->dentries_per_clu; + dentries_per_clu_bits = my_log2(dentries_per_clu); + + clu_offset = dentry >> dentries_per_clu_bits; + clu.dir = dir.dir; + clu.size = dir.size; + clu.flags = dir.flags; + + if (clu.flags == 0x03) { + clu.dir += clu_offset; + clu.size -= clu_offset; + } else { + if ((clu_offset > 0) && (fid->hint_last_off > 0) && + (clu_offset >= fid->hint_last_off)) { + clu_offset -= fid->hint_last_off; + clu.dir = fid->hint_last_clu; + } + + while (clu_offset > 0) { + if (FAT_read(sb, clu.dir, &(clu.dir)) == -1) + return FFS_MEDIAERR; + + clu_offset--; + } + } + } + + while (clu.dir != CLUSTER_32(~0)) { + if (p_fs->dev_ejected) + break; + + if (dir.dir == CLUSTER_32(0)) + i = dentry % dentries_per_clu; + else + i = dentry & (dentries_per_clu-1); + + for ( ; i < dentries_per_clu; i++, dentry++) { + ep = get_entry_in_dir(sb, &clu, i, §or); + if (!ep) + return FFS_MEDIAERR; + + type = p_fs->fs_func->get_entry_type(ep); + + if (type == TYPE_UNUSED) + break; + + if ((type != TYPE_FILE) && (type != TYPE_DIR)) + continue; + + buf_lock(sb, sector); + dir_entry->Attr = p_fs->fs_func->get_entry_attr(ep); + + p_fs->fs_func->get_entry_time(ep, &tm, TM_CREATE); + dir_entry->CreateTimestamp.Year = tm.year; + dir_entry->CreateTimestamp.Month = tm.mon; + dir_entry->CreateTimestamp.Day = tm.day; + dir_entry->CreateTimestamp.Hour = tm.hour; + dir_entry->CreateTimestamp.Minute = tm.min; + dir_entry->CreateTimestamp.Second = tm.sec; + dir_entry->CreateTimestamp.MilliSecond = 0; + + p_fs->fs_func->get_entry_time(ep, &tm, TM_MODIFY); + dir_entry->ModifyTimestamp.Year = tm.year; + dir_entry->ModifyTimestamp.Month = tm.mon; + dir_entry->ModifyTimestamp.Day = tm.day; + dir_entry->ModifyTimestamp.Hour = tm.hour; + dir_entry->ModifyTimestamp.Minute = tm.min; + dir_entry->ModifyTimestamp.Second = tm.sec; + dir_entry->ModifyTimestamp.MilliSecond = 0; + + MEMSET((INT8 *) &dir_entry->AccessTimestamp, 0, sizeof(DATE_TIME_T)); + + *(uni_name.name) = 0x0; + p_fs->fs_func->get_uni_name_from_ext_entry(sb, &dir, dentry, uni_name.name); + if (*(uni_name.name) == 0x0) + get_uni_name_from_dos_entry(sb, (DOS_DENTRY_T *) ep, &uni_name, 0x1); + nls_uniname_to_cstring(sb, dir_entry->Name, &uni_name); + buf_unlock(sb, sector); + + if (p_fs->vol_type == EXFAT) { + ep = get_entry_in_dir(sb, &clu, i+1, NULL); + if (!ep) + return FFS_MEDIAERR; + } else { + get_uni_name_from_dos_entry(sb, (DOS_DENTRY_T *) ep, &uni_name, 0x0); + nls_uniname_to_cstring(sb, dir_entry->ShortName, &uni_name); + } + + dir_entry->Size = p_fs->fs_func->get_entry_size(ep); + + if (dir.dir == CLUSTER_32(0)) { + } else { + fid->hint_last_off = dentry >> dentries_per_clu_bits; + fid->hint_last_clu = clu.dir; + } + + fid->rwoffset = (INT64) ++dentry; + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return FFS_SUCCESS; + } + + if (dir.dir == CLUSTER_32(0)) + break; + + if (clu.flags == 0x03) { + if ((--clu.size) > 0) + clu.dir++; + else + clu.dir = CLUSTER_32(~0); + } else { + if (FAT_read(sb, clu.dir, &(clu.dir)) == -1) + return FFS_MEDIAERR; + } + } + + *(dir_entry->Name) = '\0'; + + fid->rwoffset = (INT64) ++dentry; + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return FFS_SUCCESS; +} + +INT32 ffsRemoveDir(struct inode *inode, FILE_ID_T *fid) +{ + INT32 dentry; + CHAIN_T dir, clu_to_free; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + dir.dir = fid->dir.dir; + dir.size = fid->dir.size; + dir.flags = fid->dir.flags; + + dentry = fid->entry; + + if (p_fs->vol_type != EXFAT) { + if ((dir.dir != p_fs->root_dir) && (dentry < 2)) + return FFS_PERMISSIONERR; + } + + clu_to_free.dir = fid->start_clu; + clu_to_free.size = (INT32)((fid->size-1) >> p_fs->cluster_size_bits) + 1; + clu_to_free.flags = fid->flags; + + if (!is_dir_empty(sb, &clu_to_free)) + return FFS_FILEEXIST; + + fs_set_vol_flags(sb, VOL_DIRTY); + + remove_file(inode, &dir, dentry); + + p_fs->fs_func->free_cluster(sb, &clu_to_free, 1); + + fid->size = 0; + fid->start_clu = CLUSTER_32(~0); + fid->flags = (p_fs->vol_type == EXFAT)? 0x03: 0x01; + +#if (DELAYED_SYNC == 0) + fs_sync(sb, 0); + fs_set_vol_flags(sb, VOL_CLEAN); +#endif + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + return FFS_SUCCESS; +} + +INT32 fs_init(void) +{ + if (sizeof(DENTRY_T) != DENTRY_SIZE) { + return FFS_ALIGNMENTERR; + } + + if (sizeof(DOS_DENTRY_T) != DENTRY_SIZE) { + return FFS_ALIGNMENTERR; + } + + if (sizeof(EXT_DENTRY_T) != DENTRY_SIZE) { + return FFS_ALIGNMENTERR; + } + + if (sizeof(FILE_DENTRY_T) != DENTRY_SIZE) { + return FFS_ALIGNMENTERR; + } + + if (sizeof(STRM_DENTRY_T) != DENTRY_SIZE) { + return FFS_ALIGNMENTERR; + } + + if (sizeof(NAME_DENTRY_T) != DENTRY_SIZE) { + return FFS_ALIGNMENTERR; + } + + if (sizeof(BMAP_DENTRY_T) != DENTRY_SIZE) { + return FFS_ALIGNMENTERR; + } + + if (sizeof(CASE_DENTRY_T) != DENTRY_SIZE) { + return FFS_ALIGNMENTERR; + } + + if (sizeof(VOLM_DENTRY_T) != DENTRY_SIZE) { + return FFS_ALIGNMENTERR; + } + + return FFS_SUCCESS; +} + +INT32 fs_shutdown(void) +{ + return FFS_SUCCESS; +} + +void fs_set_vol_flags(struct super_block *sb, UINT32 new_flag) +{ + PBR_SECTOR_T *p_pbr; + BPBEX_T *p_bpb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (p_fs->vol_flag == new_flag) + return; + + p_fs->vol_flag = new_flag; + + if (p_fs->vol_type == EXFAT) { + if (p_fs->pbr_bh == NULL) { + if (sector_read(sb, p_fs->PBR_sector, &(p_fs->pbr_bh), 1) != FFS_SUCCESS) + return; + } + + p_pbr = (PBR_SECTOR_T *) p_fs->pbr_bh->b_data; + p_bpb = (BPBEX_T *) p_pbr->bpb; + SET16(p_bpb->vol_flags, (UINT16) new_flag); + + if ((new_flag == VOL_DIRTY) && (!buffer_dirty(p_fs->pbr_bh))) + sector_write(sb, p_fs->PBR_sector, p_fs->pbr_bh, 1); + else + sector_write(sb, p_fs->PBR_sector, p_fs->pbr_bh, 0); + } +} + +void fs_sync(struct super_block *sb, INT32 do_sync) +{ + if (do_sync) + bdev_sync(sb); +} + +void fs_error(struct super_block *sb) +{ + struct exfat_mount_options *opts = &EXFAT_SB(sb)->options; + + if (opts->errors == EXFAT_ERRORS_PANIC) + panic("[EXFAT] Filesystem panic from previous error\n"); + else if ((opts->errors == EXFAT_ERRORS_RO) && !(sb->s_flags & MS_RDONLY)) { + sb->s_flags |= MS_RDONLY; + printk(KERN_ERR "[EXFAT] Filesystem has been set read-only\n"); + } +} + +INT32 clear_cluster(struct super_block *sb, UINT32 clu) +{ + UINT32 s, n; + INT32 ret = FFS_SUCCESS; + struct buffer_head *tmp_bh = NULL; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + if (clu == CLUSTER_32(0)) { + s = p_fs->root_start_sector; + n = p_fs->data_start_sector; + } else { + s = START_SECTOR(clu); + n = s + p_fs->sectors_per_clu; + } + + for ( ; s < n; s++) { + if ((ret = sector_read(sb, s, &tmp_bh, 0)) != FFS_SUCCESS) + return ret; + + MEMSET((INT8 *) tmp_bh->b_data, 0x0, p_bd->sector_size); + if ((ret = sector_write(sb, s, tmp_bh, 0)) !=FFS_SUCCESS) + break; + } + + brelse(tmp_bh); + return ret; +} + +INT32 fat_alloc_cluster(struct super_block *sb, INT32 num_alloc, CHAIN_T *p_chain) +{ + INT32 i, num_clusters = 0; + UINT32 new_clu, last_clu = CLUSTER_32(~0), read_clu; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + new_clu = p_chain->dir; + if (new_clu == CLUSTER_32(~0)) + new_clu = p_fs->clu_srch_ptr; + else if (new_clu >= p_fs->num_clusters) + new_clu = 2; + + __set_sb_dirty(sb); + + p_chain->dir = CLUSTER_32(~0); + + for (i = 2; i < p_fs->num_clusters; i++) { + if (FAT_read(sb, new_clu, &read_clu) != 0) + return 0; + + if (read_clu == CLUSTER_32(0)) { + FAT_write(sb, new_clu, CLUSTER_32(~0)); + num_clusters++; + + if (p_chain->dir == CLUSTER_32(~0)) + p_chain->dir = new_clu; + else + FAT_write(sb, last_clu, new_clu); + + last_clu = new_clu; + + if ((--num_alloc) == 0) { + p_fs->clu_srch_ptr = new_clu; + if (p_fs->used_clusters != (UINT32) ~0) + p_fs->used_clusters += num_clusters; + + return(num_clusters); + } + } + if ((++new_clu) >= p_fs->num_clusters) + new_clu = 2; + } + + p_fs->clu_srch_ptr = new_clu; + if (p_fs->used_clusters != (UINT32) ~0) + p_fs->used_clusters += num_clusters; + + return(num_clusters); +} + +INT32 exfat_alloc_cluster(struct super_block *sb, INT32 num_alloc, CHAIN_T *p_chain) +{ + INT32 num_clusters = 0; + UINT32 hint_clu, new_clu, last_clu = CLUSTER_32(~0); + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + hint_clu = p_chain->dir; + if (hint_clu == CLUSTER_32(~0)) { + hint_clu = test_alloc_bitmap(sb, p_fs->clu_srch_ptr-2); + if (hint_clu == CLUSTER_32(~0)) + return 0; + } else if (hint_clu >= p_fs->num_clusters) { + hint_clu = 2; + p_chain->flags = 0x01; + } + + __set_sb_dirty(sb); + + p_chain->dir = CLUSTER_32(~0); + + while ((new_clu = test_alloc_bitmap(sb, hint_clu-2)) != CLUSTER_32(~0)) { + if (new_clu != hint_clu) { + if (p_chain->flags == 0x03) { + exfat_chain_cont_cluster(sb, p_chain->dir, num_clusters); + p_chain->flags = 0x01; + } + } + + if (set_alloc_bitmap(sb, new_clu-2) != FFS_SUCCESS) + return 0; + + num_clusters++; + + if (p_chain->flags == 0x01) + FAT_write(sb, new_clu, CLUSTER_32(~0)); + + if (p_chain->dir == CLUSTER_32(~0)) { + p_chain->dir = new_clu; + } else { + if (p_chain->flags == 0x01) + FAT_write(sb, last_clu, new_clu); + } + last_clu = new_clu; + + if ((--num_alloc) == 0) { + p_fs->clu_srch_ptr = hint_clu; + if (p_fs->used_clusters != (UINT32) ~0) + p_fs->used_clusters += num_clusters; + + p_chain->size += num_clusters; + return(num_clusters); + } + + hint_clu = new_clu + 1; + if (hint_clu >= p_fs->num_clusters) { + hint_clu = 2; + + if (p_chain->flags == 0x03) { + exfat_chain_cont_cluster(sb, p_chain->dir, num_clusters); + p_chain->flags = 0x01; + } + } + } + + p_fs->clu_srch_ptr = hint_clu; + if (p_fs->used_clusters != (UINT32) ~0) + p_fs->used_clusters += num_clusters; + + p_chain->size += num_clusters; + return(num_clusters); +} + +void fat_free_cluster(struct super_block *sb, CHAIN_T *p_chain, INT32 do_relse) +{ + INT32 num_clusters = 0; + UINT32 clu, prev; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + INT32 i; + UINT32 sector; + + if ((p_chain->dir == CLUSTER_32(0)) || (p_chain->dir == CLUSTER_32(~0))) + return; + __set_sb_dirty(sb); + clu = p_chain->dir; + + if (p_chain->size <= 0) + return; + + do { + if (p_fs->dev_ejected) + break; + + if (do_relse) { + sector = START_SECTOR(clu); + for (i = 0; i < p_fs->sectors_per_clu; i++) { + buf_release(sb, sector+i); + } + } + + prev = clu; + if (FAT_read(sb, clu, &clu) == -1) + break; + + FAT_write(sb, prev, CLUSTER_32(0)); + num_clusters++; + + } while (clu != CLUSTER_32(~0)); + + if (p_fs->used_clusters != (UINT32) ~0) + p_fs->used_clusters -= num_clusters; +} + +void exfat_free_cluster(struct super_block *sb, CHAIN_T *p_chain, INT32 do_relse) +{ + INT32 num_clusters = 0; + UINT32 clu; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + INT32 i; + UINT32 sector; + + if ((p_chain->dir == CLUSTER_32(0)) || (p_chain->dir == CLUSTER_32(~0))) + return; + + if (p_chain->size <= 0) { + printk(KERN_ERR "[EXFAT] free_cluster : skip free-req clu:%u, " + "because of zero-size truncation\n" + ,p_chain->dir); + return; + } + + __set_sb_dirty(sb); + clu = p_chain->dir; + + if (p_chain->flags == 0x03) { + do { + if (do_relse) { + sector = START_SECTOR(clu); + for (i = 0; i < p_fs->sectors_per_clu; i++) { + buf_release(sb, sector+i); + } + } + + if (clr_alloc_bitmap(sb, clu-2) != FFS_SUCCESS) + break; + clu++; + + num_clusters++; + } while (num_clusters < p_chain->size); + } else { + do { + if (p_fs->dev_ejected) + break; + + if (do_relse) { + sector = START_SECTOR(clu); + for (i = 0; i < p_fs->sectors_per_clu; i++) { + buf_release(sb, sector+i); + } + } + + if (clr_alloc_bitmap(sb, clu-2) != FFS_SUCCESS) + break; + + if (FAT_read(sb, clu, &clu) == -1) + break; + num_clusters++; + } while ((clu != CLUSTER_32(0)) && (clu != CLUSTER_32(~0))); + } + + if (p_fs->used_clusters != (UINT32) ~0) + p_fs->used_clusters -= num_clusters; +} + +UINT32 find_last_cluster(struct super_block *sb, CHAIN_T *p_chain) +{ + UINT32 clu, next; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + clu = p_chain->dir; + + if (p_chain->flags == 0x03) { + clu += p_chain->size - 1; + } else { + while((FAT_read(sb, clu, &next) == 0) && (next != CLUSTER_32(~0))) { + if (p_fs->dev_ejected) + break; + clu = next; + } + } + + return(clu); +} + +INT32 count_num_clusters(struct super_block *sb, CHAIN_T *p_chain) +{ + INT32 i, count = 0; + UINT32 clu; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if ((p_chain->dir == CLUSTER_32(0)) || (p_chain->dir == CLUSTER_32(~0))) + return 0; + + clu = p_chain->dir; + + if (p_chain->flags == 0x03) { + count = p_chain->size; + } else { + for (i = 2; i < p_fs->num_clusters; i++) { + count++; + if (FAT_read(sb, clu, &clu) != 0) + return 0; + if (clu == CLUSTER_32(~0)) + break; + } + } + + return(count); +} + +INT32 fat_count_used_clusters(struct super_block *sb) +{ + INT32 i, count = 0; + UINT32 clu; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + for (i = 2; i < p_fs->num_clusters; i++) { + if (FAT_read(sb, i, &clu) != 0) + break; + if (clu != CLUSTER_32(0)) + count++; + } + + return(count); +} + +INT32 exfat_count_used_clusters(struct super_block *sb) +{ + INT32 i, map_i, map_b, count = 0; + UINT8 k; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + map_i = map_b = 0; + + for (i = 2; i < p_fs->num_clusters; i += 8) { + k = *(((UINT8 *) p_fs->vol_amap[map_i]->b_data) + map_b); + count += used_bit[k]; + + if ((++map_b) >= p_bd->sector_size) { + map_i++; + map_b = 0; + } + } + + return(count); +} + +void exfat_chain_cont_cluster(struct super_block *sb, UINT32 chain, INT32 len) +{ + if (len == 0) + return; + + while (len > 1) { + FAT_write(sb, chain, chain+1); + chain++; + len--; + } + FAT_write(sb, chain, CLUSTER_32(~0)); +} + +INT32 load_alloc_bitmap(struct super_block *sb) +{ + INT32 i, j, ret; + UINT32 map_size; + UINT32 type, sector; + CHAIN_T clu; + BMAP_DENTRY_T *ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + clu.dir = p_fs->root_dir; + clu.flags = 0x01; + + while (clu.dir != CLUSTER_32(~0)) { + if (p_fs->dev_ejected) + break; + + for (i = 0; i < p_fs->dentries_per_clu; i++) { + ep = (BMAP_DENTRY_T *) get_entry_in_dir(sb, &clu, i, NULL); + if (!ep) + return FFS_MEDIAERR; + + type = p_fs->fs_func->get_entry_type((DENTRY_T *) ep); + + if (type == TYPE_UNUSED) + break; + if (type != TYPE_BITMAP) + continue; + + if (ep->flags == 0x0) { + p_fs->map_clu = GET32_A(ep->start_clu); + map_size = (UINT32) GET64_A(ep->size); + + p_fs->map_sectors = ((map_size-1) >> p_bd->sector_size_bits) + 1; + + p_fs->vol_amap = (struct buffer_head **) MALLOC(sizeof(struct buffer_head *) * p_fs->map_sectors); + if (p_fs->vol_amap == NULL) + return FFS_MEMORYERR; + + sector = START_SECTOR(p_fs->map_clu); + + for (j = 0; j < p_fs->map_sectors; j++) { + p_fs->vol_amap[j] = NULL; + ret = sector_read(sb, sector+j, &(p_fs->vol_amap[j]), 1); + if (ret != FFS_SUCCESS) { + i=0; + while (i < j) + brelse(p_fs->vol_amap[i++]); + + FREE(p_fs->vol_amap); + p_fs->vol_amap = NULL; + return ret; + } + } + + p_fs->pbr_bh = NULL; + return FFS_SUCCESS; + } + } + + if (FAT_read(sb, clu.dir, &(clu.dir)) != 0) + return FFS_MEDIAERR; + } + + return FFS_FORMATERR; +} + +void free_alloc_bitmap(struct super_block *sb) +{ + INT32 i; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + brelse(p_fs->pbr_bh); + + for (i = 0; i < p_fs->map_sectors; i++) { + __brelse(p_fs->vol_amap[i]); + } + + FREE(p_fs->vol_amap); + p_fs->vol_amap = NULL; +} + +INT32 set_alloc_bitmap(struct super_block *sb, UINT32 clu) +{ + INT32 i, b; + UINT32 sector; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + i = clu >> (p_bd->sector_size_bits + 3); + b = clu & ((p_bd->sector_size << 3) - 1); + + sector = START_SECTOR(p_fs->map_clu) + i; + + Bitmap_set((UINT8 *) p_fs->vol_amap[i]->b_data, b); + + return (sector_write(sb, sector, p_fs->vol_amap[i], 0)); +} + +INT32 clr_alloc_bitmap(struct super_block *sb, UINT32 clu) +{ + INT32 i, b; + UINT32 sector; +#ifdef CONFIG_EXFAT_DISCARD + struct exfat_sb_info *sbi = EXFAT_SB(sb); + struct exfat_mount_options *opts = &sbi->options; + int ret; +#endif + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + i = clu >> (p_bd->sector_size_bits + 3); + b = clu & ((p_bd->sector_size << 3) - 1); + + sector = START_SECTOR(p_fs->map_clu) + i; + + Bitmap_clear((UINT8 *) p_fs->vol_amap[i]->b_data, b); + + return (sector_write(sb, sector, p_fs->vol_amap[i], 0)); + +#ifdef CONFIG_EXFAT_DISCARD + if (opts->discard) { + ret = sb_issue_discard(sb, START_SECTOR(clu), (1 << p_fs->sectors_per_clu_bits), GFP_NOFS, 0); + if (ret == -EOPNOTSUPP) { + printk(KERN_WARNING "discard not supported by device, disabling"); + opts->discard = 0; + } + } +#endif +} + +UINT32 test_alloc_bitmap(struct super_block *sb, UINT32 clu) +{ + INT32 i, map_i, map_b; + UINT32 clu_base, clu_free; + UINT8 k, clu_mask; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + clu_base = (clu & ~(0x7)) + 2; + clu_mask = (1 << (clu - clu_base + 2)) - 1; + + map_i = clu >> (p_bd->sector_size_bits + 3); + map_b = (clu >> 3) & p_bd->sector_size_mask; + + for (i = 2; i < p_fs->num_clusters; i += 8) { + k = *(((UINT8 *) p_fs->vol_amap[map_i]->b_data) + map_b); + if (clu_mask > 0) { + k |= clu_mask; + clu_mask = 0; + } + if (k < 0xFF) { + clu_free = clu_base + free_bit[k]; + if (clu_free < p_fs->num_clusters) + return(clu_free); + } + clu_base += 8; + + if (((++map_b) >= p_bd->sector_size) || (clu_base >= p_fs->num_clusters)) { + if ((++map_i) >= p_fs->map_sectors) { + clu_base = 2; + map_i = 0; + } + map_b = 0; + } + } + + return(CLUSTER_32(~0)); +} + +void sync_alloc_bitmap(struct super_block *sb) +{ + INT32 i; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (p_fs->vol_amap == NULL) + return; + + for (i = 0; i < p_fs->map_sectors; i++) { + sync_dirty_buffer(p_fs->vol_amap[i]); + } +} + +INT32 __load_upcase_table(struct super_block *sb, UINT32 sector, UINT32 num_sectors, UINT32 utbl_checksum) +{ + INT32 i, ret = FFS_ERROR; + UINT32 j; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + struct buffer_head *tmp_bh = NULL; + + UINT8 skip = FALSE; + UINT32 index = 0; + UINT16 uni = 0; + UINT16 **upcase_table; + + UINT32 checksum = 0; + + upcase_table = p_fs->vol_utbl = (UINT16 **) MALLOC(UTBL_COL_COUNT * sizeof(UINT16 *)); + if(upcase_table == NULL) + return FFS_MEMORYERR; + MEMSET(upcase_table, 0, UTBL_COL_COUNT * sizeof(UINT16 *)); + + num_sectors += sector; + + while(sector < num_sectors) { + ret = sector_read(sb, sector, &tmp_bh, 1); + if (ret != FFS_SUCCESS) { + PRINTK("sector read (0x%X)fail\n", sector); + goto error; + } + sector++; + + for(i = 0; i < p_bd->sector_size && index <= 0xFFFF; i += 2) { + uni = GET16(((UINT8 *) tmp_bh->b_data)+i); + + checksum = ((checksum & 1) ? 0x80000000 : 0 ) + (checksum >> 1) + *(((UINT8 *) tmp_bh->b_data)+i); + checksum = ((checksum & 1) ? 0x80000000 : 0 ) + (checksum >> 1) + *(((UINT8 *) tmp_bh->b_data)+(i+1)); + + if(skip) { + PRINTK("skip from 0x%X ", index); + index += uni; + PRINTK("to 0x%X (amount of 0x%X)\n", index, uni); + skip = FALSE; + } else if(uni == index) + index++; + else if(uni == 0xFFFF) + skip = TRUE; + else { + UINT16 col_index = get_col_index(index); + + if(upcase_table[col_index]== NULL) { + PRINTK("alloc = 0x%X\n", col_index); + upcase_table[col_index] = (UINT16 *) MALLOC(UTBL_ROW_COUNT * sizeof(UINT16)); + if(upcase_table[col_index] == NULL) { + ret = FFS_MEMORYERR; + goto error; + } + + for(j = 0 ; j < UTBL_ROW_COUNT ; j++) + upcase_table[col_index][j] = (col_index << LOW_INDEX_BIT) | j; + } + + upcase_table[col_index][get_row_index(index)] = uni; + index++; + } + } + } + if(index >= 0xFFFF && utbl_checksum == checksum) { + if(tmp_bh) + brelse(tmp_bh); + return FFS_SUCCESS; + } + ret = FFS_ERROR; +error: + if(tmp_bh) + brelse(tmp_bh); + free_upcase_table(sb); + return ret; +} + +INT32 __load_default_upcase_table(struct super_block *sb) +{ + INT32 i, ret = FFS_ERROR; + UINT32 j; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + UINT8 skip = FALSE; + UINT32 index = 0; + UINT16 uni = 0; + UINT16 **upcase_table; + + upcase_table = p_fs->vol_utbl = (UINT16 **) MALLOC(UTBL_COL_COUNT * sizeof(UINT16 *)); + if(upcase_table == NULL) + return FFS_MEMORYERR; + MEMSET(upcase_table, 0, UTBL_COL_COUNT * sizeof(UINT16 *)); + + for(i = 0; index <= 0xFFFF && i < NUM_UPCASE*2; i += 2) { + uni = GET16(uni_upcase + i); + if(skip) { + PRINTK("skip from 0x%X ", index); + index += uni; + PRINTK("to 0x%X (amount of 0x%X)\n", index, uni); + skip = FALSE; + } else if(uni == index) + index++; + else if(uni == 0xFFFF) + skip = TRUE; + else { + UINT16 col_index = get_col_index(index); + + if(upcase_table[col_index]== NULL) { + PRINTK("alloc = 0x%X\n", col_index); + upcase_table[col_index] = (UINT16 *) MALLOC(UTBL_ROW_COUNT * sizeof(UINT16)); + if(upcase_table[col_index] == NULL) { + ret = FFS_MEMORYERR; + goto error; + } + + for(j = 0 ; j < UTBL_ROW_COUNT ; j++) + upcase_table[col_index][j] = (col_index << LOW_INDEX_BIT) | j; + } + + upcase_table[col_index][get_row_index(index)] = uni; + index ++; + } + } + + if(index >= 0xFFFF) + return FFS_SUCCESS; + +error: + free_upcase_table(sb); + return ret; +} + +INT32 load_upcase_table(struct super_block *sb) +{ + INT32 i; + UINT32 tbl_clu, tbl_size; + UINT32 type, sector, num_sectors; + CHAIN_T clu; + CASE_DENTRY_T *ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + clu.dir = p_fs->root_dir; + clu.flags = 0x01; + + if (p_fs->dev_ejected) + return FFS_MEDIAERR; + + while (clu.dir != CLUSTER_32(~0)) { + for (i = 0; i < p_fs->dentries_per_clu; i++) { + ep = (CASE_DENTRY_T *) get_entry_in_dir(sb, &clu, i, NULL); + if (!ep) + return FFS_MEDIAERR; + + type = p_fs->fs_func->get_entry_type((DENTRY_T *) ep); + + if (type == TYPE_UNUSED) + break; + if (type != TYPE_UPCASE) + continue; + + tbl_clu = GET32_A(ep->start_clu); + tbl_size = (UINT32) GET64_A(ep->size); + + sector = START_SECTOR(tbl_clu); + num_sectors = ((tbl_size-1) >> p_bd->sector_size_bits) + 1; + if(__load_upcase_table(sb, sector, num_sectors, GET32_A(ep->checksum)) != FFS_SUCCESS) + break; + else + return FFS_SUCCESS; + } + if (FAT_read(sb, clu.dir, &(clu.dir)) != 0) + return FFS_MEDIAERR; + } + return __load_default_upcase_table(sb); +} + +void free_upcase_table(struct super_block *sb) +{ + UINT32 i; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + UINT16 **upcase_table; + + upcase_table = p_fs->vol_utbl; + for(i = 0 ; i < UTBL_COL_COUNT ; i ++) + FREE(upcase_table[i]); + + FREE(p_fs->vol_utbl); + + p_fs->vol_utbl = NULL; +} + +UINT32 fat_get_entry_type(DENTRY_T *p_entry) +{ + DOS_DENTRY_T *ep = (DOS_DENTRY_T *) p_entry; + + if (*(ep->name) == 0x0) + return TYPE_UNUSED; + + else if (*(ep->name) == 0xE5) + return TYPE_DELETED; + + else if (ep->attr == ATTR_EXTEND) + return TYPE_EXTEND; + + else if ((ep->attr & (ATTR_SUBDIR|ATTR_VOLUME)) == ATTR_VOLUME) + return TYPE_VOLUME; + + else if ((ep->attr & (ATTR_SUBDIR|ATTR_VOLUME)) == ATTR_SUBDIR) + return TYPE_DIR; + + return TYPE_FILE; +} + +UINT32 exfat_get_entry_type(DENTRY_T *p_entry) +{ + FILE_DENTRY_T *ep = (FILE_DENTRY_T *) p_entry; + + if (ep->type == 0x0) { + return TYPE_UNUSED; + } else if (ep->type < 0x80) { + return TYPE_DELETED; + } else if (ep->type == 0x80) { + return TYPE_INVALID; + } else if (ep->type < 0xA0) { + if (ep->type == 0x81) { + return TYPE_BITMAP; + } else if (ep->type == 0x82) { + return TYPE_UPCASE; + } else if (ep->type == 0x83) { + return TYPE_VOLUME; + } else if (ep->type == 0x85) { + if (GET16_A(ep->attr) & ATTR_SUBDIR) + return TYPE_DIR; + else + return TYPE_FILE; + } + return TYPE_CRITICAL_PRI; + } else if (ep->type < 0xC0) { + if (ep->type == 0xA0) { + return TYPE_GUID; + } else if (ep->type == 0xA1) { + return TYPE_PADDING; + } else if (ep->type == 0xA2) { + return TYPE_ACLTAB; + } + return TYPE_BENIGN_PRI; + } else if (ep->type < 0xE0) { + if (ep->type == 0xC0) { + return TYPE_STREAM; + } else if (ep->type == 0xC1) { + return TYPE_EXTEND; + } else if (ep->type == 0xC2) { + return TYPE_ACL; + } + return TYPE_CRITICAL_SEC; + } + + return TYPE_BENIGN_SEC; +} + +void fat_set_entry_type(DENTRY_T *p_entry, UINT32 type) +{ + DOS_DENTRY_T *ep = (DOS_DENTRY_T *) p_entry; + + if (type == TYPE_UNUSED) + *(ep->name) = 0x0; + + else if (type == TYPE_DELETED) + *(ep->name) = 0xE5; + + else if (type == TYPE_EXTEND) + ep->attr = ATTR_EXTEND; + + else if (type == TYPE_DIR) + ep->attr = ATTR_SUBDIR; + + else if (type == TYPE_FILE) + ep->attr = ATTR_ARCHIVE; + + else if (type == TYPE_SYMLINK) + ep->attr = ATTR_ARCHIVE | ATTR_SYMLINK; +} + +void exfat_set_entry_type(DENTRY_T *p_entry, UINT32 type) +{ + FILE_DENTRY_T *ep = (FILE_DENTRY_T *) p_entry; + + if (type == TYPE_UNUSED) { + ep->type = 0x0; + } else if (type == TYPE_DELETED) { + ep->type &= ~0x80; + } else if (type == TYPE_STREAM) { + ep->type = 0xC0; + } else if (type == TYPE_EXTEND) { + ep->type = 0xC1; + } else if (type == TYPE_BITMAP) { + ep->type = 0x81; + } else if (type == TYPE_UPCASE) { + ep->type = 0x82; + } else if (type == TYPE_VOLUME) { + ep->type = 0x83; + } else if (type == TYPE_DIR) { + ep->type = 0x85; + SET16_A(ep->attr, ATTR_SUBDIR); + } else if (type == TYPE_FILE) { + ep->type = 0x85; + SET16_A(ep->attr, ATTR_ARCHIVE); + } else if (type == TYPE_SYMLINK) { + ep->type = 0x85; + SET16_A(ep->attr, ATTR_ARCHIVE | ATTR_SYMLINK); + } +} + +UINT32 fat_get_entry_attr(DENTRY_T *p_entry) +{ + DOS_DENTRY_T *ep = (DOS_DENTRY_T *) p_entry; + return((UINT32) ep->attr); +} + +UINT32 exfat_get_entry_attr(DENTRY_T *p_entry) +{ + FILE_DENTRY_T *ep = (FILE_DENTRY_T *) p_entry; + return((UINT32) GET16_A(ep->attr)); +} + +void fat_set_entry_attr(DENTRY_T *p_entry, UINT32 attr) +{ + DOS_DENTRY_T *ep = (DOS_DENTRY_T *) p_entry; + ep->attr = (UINT8) attr; +} + +void exfat_set_entry_attr(DENTRY_T *p_entry, UINT32 attr) +{ + FILE_DENTRY_T *ep = (FILE_DENTRY_T *) p_entry; + SET16_A(ep->attr, (UINT16) attr); +} + +UINT8 fat_get_entry_flag(DENTRY_T *p_entry) +{ + return 0x01; +} + +UINT8 exfat_get_entry_flag(DENTRY_T *p_entry) +{ + STRM_DENTRY_T *ep = (STRM_DENTRY_T *) p_entry; + return(ep->flags); +} + +void fat_set_entry_flag(DENTRY_T *p_entry, UINT8 flags) +{ +} + +void exfat_set_entry_flag(DENTRY_T *p_entry, UINT8 flags) +{ + STRM_DENTRY_T *ep = (STRM_DENTRY_T *) p_entry; + ep->flags = flags; +} + +UINT32 fat_get_entry_clu0(DENTRY_T *p_entry) +{ + DOS_DENTRY_T *ep = (DOS_DENTRY_T *) p_entry; + return((GET32_A(ep->start_clu_hi) << 16) | GET16_A(ep->start_clu_lo)); +} + +UINT32 exfat_get_entry_clu0(DENTRY_T *p_entry) +{ + STRM_DENTRY_T *ep = (STRM_DENTRY_T *) p_entry; + return(GET32_A(ep->start_clu)); +} + +void fat_set_entry_clu0(DENTRY_T *p_entry, UINT32 start_clu) +{ + DOS_DENTRY_T *ep = (DOS_DENTRY_T *) p_entry; + SET16_A(ep->start_clu_lo, CLUSTER_16(start_clu)); + SET16_A(ep->start_clu_hi, CLUSTER_16(start_clu >> 16)); +} + +void exfat_set_entry_clu0(DENTRY_T *p_entry, UINT32 start_clu) +{ + STRM_DENTRY_T *ep = (STRM_DENTRY_T *) p_entry; + SET32_A(ep->start_clu, start_clu); +} + +UINT64 fat_get_entry_size(DENTRY_T *p_entry) +{ + DOS_DENTRY_T *ep = (DOS_DENTRY_T *) p_entry; + return((UINT64) GET32_A(ep->size)); +} + +UINT64 exfat_get_entry_size(DENTRY_T *p_entry) +{ + STRM_DENTRY_T *ep = (STRM_DENTRY_T *) p_entry; + return(GET64_A(ep->valid_size)); +} + +void fat_set_entry_size(DENTRY_T *p_entry, UINT64 size) +{ + DOS_DENTRY_T *ep = (DOS_DENTRY_T *) p_entry; + SET32_A(ep->size, (UINT32) size); +} + +void exfat_set_entry_size(DENTRY_T *p_entry, UINT64 size) +{ + STRM_DENTRY_T *ep = (STRM_DENTRY_T *) p_entry; + SET64_A(ep->valid_size, size); + SET64_A(ep->size, size); +} + +void fat_get_entry_time(DENTRY_T *p_entry, TIMESTAMP_T *tp, UINT8 mode) +{ + UINT16 t = 0x00, d = 0x21; + DOS_DENTRY_T *ep = (DOS_DENTRY_T *) p_entry; + + switch (mode) { + case TM_CREATE: + t = GET16_A(ep->create_time); + d = GET16_A(ep->create_date); + break; + case TM_MODIFY: + t = GET16_A(ep->modify_time); + d = GET16_A(ep->modify_date); + break; + } + + tp->sec = (t & 0x001F) << 1; + tp->min = (t >> 5) & 0x003F; + tp->hour = (t >> 11); + tp->day = (d & 0x001F); + tp->mon = (d >> 5) & 0x000F; + tp->year = (d >> 9); +} + +void exfat_get_entry_time(DENTRY_T *p_entry, TIMESTAMP_T *tp, UINT8 mode) +{ + UINT16 t = 0x00, d = 0x21; + FILE_DENTRY_T *ep = (FILE_DENTRY_T *) p_entry; + + switch (mode) { + case TM_CREATE: + t = GET16_A(ep->create_time); + d = GET16_A(ep->create_date); + break; + case TM_MODIFY: + t = GET16_A(ep->modify_time); + d = GET16_A(ep->modify_date); + break; + case TM_ACCESS: + t = GET16_A(ep->access_time); + d = GET16_A(ep->access_date); + break; + } + + tp->sec = (t & 0x001F) << 1; + tp->min = (t >> 5) & 0x003F; + tp->hour = (t >> 11); + tp->day = (d & 0x001F); + tp->mon = (d >> 5) & 0x000F; + tp->year = (d >> 9); +} + +void fat_set_entry_time(DENTRY_T *p_entry, TIMESTAMP_T *tp, UINT8 mode) +{ + UINT16 t, d; + DOS_DENTRY_T *ep = (DOS_DENTRY_T *) p_entry; + + t = (tp->hour << 11) | (tp->min << 5) | (tp->sec >> 1); + d = (tp->year << 9) | (tp->mon << 5) | tp->day; + + switch (mode) { + case TM_CREATE: + SET16_A(ep->create_time, t); + SET16_A(ep->create_date, d); + break; + case TM_MODIFY: + SET16_A(ep->modify_time, t); + SET16_A(ep->modify_date, d); + break; + } +} + +void exfat_set_entry_time(DENTRY_T *p_entry, TIMESTAMP_T *tp, UINT8 mode) +{ + UINT16 t, d; + FILE_DENTRY_T *ep = (FILE_DENTRY_T *) p_entry; + + t = (tp->hour << 11) | (tp->min << 5) | (tp->sec >> 1); + d = (tp->year << 9) | (tp->mon << 5) | tp->day; + + switch (mode) { + case TM_CREATE: + SET16_A(ep->create_time, t); + SET16_A(ep->create_date, d); + break; + case TM_MODIFY: + SET16_A(ep->modify_time, t); + SET16_A(ep->modify_date, d); + break; + case TM_ACCESS: + SET16_A(ep->access_time, t); + SET16_A(ep->access_date, d); + break; + } +} + +INT32 fat_init_dir_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT32 type, + UINT32 start_clu, UINT64 size) +{ + UINT32 sector; + DOS_DENTRY_T *dos_ep; + + dos_ep = (DOS_DENTRY_T *) get_entry_in_dir(sb, p_dir, entry, §or); + if (!dos_ep) + return FFS_MEDIAERR; + + init_dos_entry(dos_ep, type, start_clu); + buf_modify(sb, sector); + + return FFS_SUCCESS; +} + +INT32 exfat_init_dir_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT32 type, + UINT32 start_clu, UINT64 size) +{ + UINT32 sector; + UINT8 flags; + FILE_DENTRY_T *file_ep; + STRM_DENTRY_T *strm_ep; + + flags = (type == TYPE_FILE) ? 0x01 : 0x03; + + file_ep = (FILE_DENTRY_T *) get_entry_in_dir(sb, p_dir, entry, §or); + if (!file_ep) + return FFS_MEDIAERR; + + strm_ep = (STRM_DENTRY_T *) get_entry_in_dir(sb, p_dir, entry+1, §or); + if (!strm_ep) + return FFS_MEDIAERR; + + init_file_entry(file_ep, type); + buf_modify(sb, sector); + + init_strm_entry(strm_ep, flags, start_clu, size); + buf_modify(sb, sector); + + return FFS_SUCCESS; +} + +INT32 fat_init_ext_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, INT32 num_entries, + UNI_NAME_T *p_uniname, DOS_NAME_T *p_dosname) +{ + INT32 i; + UINT32 sector; + UINT8 chksum; + UINT16 *uniname = p_uniname->name; + DOS_DENTRY_T *dos_ep; + EXT_DENTRY_T *ext_ep; + + dos_ep = (DOS_DENTRY_T *) get_entry_in_dir(sb, p_dir, entry, §or); + if (!dos_ep) + return FFS_MEDIAERR; + + dos_ep->lcase = p_dosname->name_case; + MEMCPY(dos_ep->name, p_dosname->name, DOS_NAME_LENGTH); + buf_modify(sb, sector); + + if ((--num_entries) > 0) { + chksum = calc_checksum_1byte((void *) dos_ep->name, DOS_NAME_LENGTH, 0); + + for (i = 1; i < num_entries; i++) { + ext_ep = (EXT_DENTRY_T *) get_entry_in_dir(sb, p_dir, entry-i, §or); + if (!ext_ep) + return FFS_MEDIAERR; + + init_ext_entry(ext_ep, i, chksum, uniname); + buf_modify(sb, sector); + uniname += 13; + } + + ext_ep = (EXT_DENTRY_T *) get_entry_in_dir(sb, p_dir, entry-i, §or); + if (!ext_ep) + return FFS_MEDIAERR; + + init_ext_entry(ext_ep, i+0x40, chksum, uniname); + buf_modify(sb, sector); + } + + return FFS_SUCCESS; +} + +INT32 exfat_init_ext_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, INT32 num_entries, + UNI_NAME_T *p_uniname, DOS_NAME_T *p_dosname) +{ + INT32 i; + UINT32 sector; + UINT16 *uniname = p_uniname->name; + FILE_DENTRY_T *file_ep; + STRM_DENTRY_T *strm_ep; + NAME_DENTRY_T *name_ep; + + file_ep = (FILE_DENTRY_T *) get_entry_in_dir(sb, p_dir, entry, §or); + if (!file_ep) + return FFS_MEDIAERR; + + file_ep->num_ext = (UINT8)(num_entries - 1); + buf_modify(sb, sector); + + strm_ep = (STRM_DENTRY_T *) get_entry_in_dir(sb, p_dir, entry+1, §or); + if (!strm_ep) + return FFS_MEDIAERR; + + strm_ep->name_len = p_uniname->name_len; + SET16_A(strm_ep->name_hash, p_uniname->name_hash); + buf_modify(sb, sector); + + for (i = 2; i < num_entries; i++) { + name_ep = (NAME_DENTRY_T *) get_entry_in_dir(sb, p_dir, entry+i, §or); + if (!name_ep) + return FFS_MEDIAERR; + + init_name_entry(name_ep, uniname); + buf_modify(sb, sector); + uniname += 15; + } + + update_dir_checksum(sb, p_dir, entry); + + return FFS_SUCCESS; +} + +void init_dos_entry(DOS_DENTRY_T *ep, UINT32 type, UINT32 start_clu) +{ + TIMESTAMP_T tm, *tp; + + fat_set_entry_type((DENTRY_T *) ep, type); + SET16_A(ep->start_clu_lo, CLUSTER_16(start_clu)); + SET16_A(ep->start_clu_hi, CLUSTER_16(start_clu >> 16)); + SET32_A(ep->size, 0); + + tp = tm_current(&tm); + fat_set_entry_time((DENTRY_T *) ep, tp, TM_CREATE); + fat_set_entry_time((DENTRY_T *) ep, tp, TM_MODIFY); + SET16_A(ep->access_date, 0); + ep->create_time_ms = 0; +} + +void init_ext_entry(EXT_DENTRY_T *ep, INT32 order, UINT8 chksum, UINT16 *uniname) +{ + INT32 i; + UINT8 end = FALSE; + + fat_set_entry_type((DENTRY_T *) ep, TYPE_EXTEND); + ep->order = (UINT8) order; + ep->sysid = 0; + ep->checksum = chksum; + SET16_A(ep->start_clu, 0); + + for (i = 0; i < 10; i += 2) { + if (!end) { + SET16(ep->unicode_0_4+i, *uniname); + if (*uniname == 0x0) + end = TRUE; + else + uniname++; + } else { + SET16(ep->unicode_0_4+i, 0xFFFF); + } + } + + for (i = 0; i < 12; i += 2) { + if (!end) { + SET16_A(ep->unicode_5_10+i, *uniname); + if (*uniname == 0x0) + end = TRUE; + else + uniname++; + } else { + SET16_A(ep->unicode_5_10+i, 0xFFFF); + } + } + + for (i = 0; i < 4; i += 2) { + if (!end) { + SET16_A(ep->unicode_11_12+i, *uniname); + if (*uniname == 0x0) + end = TRUE; + else + uniname++; + } else { + SET16_A(ep->unicode_11_12+i, 0xFFFF); + } + } +} + +void init_file_entry(FILE_DENTRY_T *ep, UINT32 type) +{ + TIMESTAMP_T tm, *tp; + + exfat_set_entry_type((DENTRY_T *) ep, type); + + tp = tm_current(&tm); + exfat_set_entry_time((DENTRY_T *) ep, tp, TM_CREATE); + exfat_set_entry_time((DENTRY_T *) ep, tp, TM_MODIFY); + exfat_set_entry_time((DENTRY_T *) ep, tp, TM_ACCESS); + ep->create_time_ms = 0; + ep->modify_time_ms = 0; + ep->access_time_ms = 0; +} + +void init_strm_entry(STRM_DENTRY_T *ep, UINT8 flags, UINT32 start_clu, UINT64 size) +{ + exfat_set_entry_type((DENTRY_T *) ep, TYPE_STREAM); + ep->flags = flags; + SET32_A(ep->start_clu, start_clu); + SET64_A(ep->valid_size, size); + SET64_A(ep->size, size); +} + +void init_name_entry(NAME_DENTRY_T *ep, UINT16 *uniname) +{ + INT32 i; + + exfat_set_entry_type((DENTRY_T *) ep, TYPE_EXTEND); + ep->flags = 0x0; + + for (i = 0; i < 30; i++, i++) { + SET16_A(ep->unicode_0_14+i, *uniname); + if (*uniname == 0x0) + break; + uniname++; + } +} + +void fat_delete_dir_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, INT32 order, INT32 num_entries) +{ + INT32 i; + UINT32 sector; + DENTRY_T *ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + for (i = num_entries-1; i >= order; i--) { + ep = get_entry_in_dir(sb, p_dir, entry-i, §or); + if (!ep) + return; + + p_fs->fs_func->set_entry_type(ep, TYPE_DELETED); + buf_modify(sb, sector); + } +} + +void exfat_delete_dir_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, INT32 order, INT32 num_entries) +{ + INT32 i; + UINT32 sector; + DENTRY_T *ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + for (i = order; i < num_entries; i++) { + ep = get_entry_in_dir(sb, p_dir, entry+i, §or); + if (!ep) + return; + + p_fs->fs_func->set_entry_type(ep, TYPE_DELETED); + buf_modify(sb, sector); + } +} + +void update_dir_checksum(struct super_block *sb, CHAIN_T *p_dir, INT32 entry) +{ + INT32 i, num_entries; + UINT32 sector; + UINT16 chksum; + FILE_DENTRY_T *file_ep; + DENTRY_T *ep; + + file_ep = (FILE_DENTRY_T *) get_entry_in_dir(sb, p_dir, entry, §or); + if (!file_ep) + return; + + buf_lock(sb, sector); + + num_entries = (INT32) file_ep->num_ext + 1; + chksum = calc_checksum_2byte((void *) file_ep, DENTRY_SIZE, 0, CS_DIR_ENTRY); + + for (i = 1; i < num_entries; i++) { + ep = get_entry_in_dir(sb, p_dir, entry+i, NULL); + if (!ep) { + buf_unlock(sb, sector); + return; + } + + chksum = calc_checksum_2byte((void *) ep, DENTRY_SIZE, chksum, CS_DEFAULT); + } + + SET16_A(file_ep->checksum, chksum); + buf_modify(sb, sector); + buf_unlock(sb, sector); +} + +void update_dir_checksum_with_entry_set (struct super_block *sb, ENTRY_SET_CACHE_T *es) +{ + DENTRY_T *ep; + UINT16 chksum = 0; + INT32 chksum_type = CS_DIR_ENTRY, i; + + ep = (DENTRY_T *)&(es->__buf); + for (i=0; i < es->num_entries; i++) { + PRINTK ("update_dir_checksum_with_entry_set ep %p\n", ep); + chksum = calc_checksum_2byte((void *) ep, DENTRY_SIZE, chksum, chksum_type); + ep++; + chksum_type = CS_DEFAULT; + } + + ep = (DENTRY_T *)&(es->__buf); + SET16_A(((FILE_DENTRY_T *)ep)->checksum, chksum); + write_whole_entry_set(sb, es); +} + +static INT32 _walk_fat_chain (struct super_block *sb, CHAIN_T *p_dir, INT32 byte_offset, UINT32 *clu) +{ + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + INT32 clu_offset; + UINT32 cur_clu; + + clu_offset = byte_offset >> p_fs->cluster_size_bits; + cur_clu = p_dir->dir; + + if (p_dir->flags == 0x03) { + cur_clu += clu_offset; + } else { + while (clu_offset > 0) { + if (FAT_read(sb, cur_clu, &cur_clu) == -1) + return FFS_MEDIAERR; + clu_offset--; + } + } + + if (clu) + *clu = cur_clu; + return FFS_SUCCESS; +} +INT32 find_location(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT32 *sector, INT32 *offset) +{ + INT32 off, ret; + UINT32 clu=0; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + off = entry << DENTRY_SIZE_BITS; + + if (p_dir->dir == CLUSTER_32(0)) { + *offset = off & p_bd->sector_size_mask; + *sector = off >> p_bd->sector_size_bits; + *sector += p_fs->root_start_sector; + } else { + ret =_walk_fat_chain(sb, p_dir, off, &clu); + if (ret != FFS_SUCCESS) + return ret; + + off &= p_fs->cluster_size - 1; + + *offset = off & p_bd->sector_size_mask; + *sector = off >> p_bd->sector_size_bits; + *sector += START_SECTOR(clu); + } + return FFS_SUCCESS; +} + +DENTRY_T *get_entry_with_sector(struct super_block *sb, UINT32 sector, INT32 offset) +{ + UINT8 *buf; + + buf = buf_getblk(sb, sector); + + if (buf == NULL) + return NULL; + + return((DENTRY_T *)(buf + offset)); +} + +DENTRY_T *get_entry_in_dir(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT32 *sector) +{ + INT32 off; + UINT32 sec; + UINT8 *buf; + + if (find_location(sb, p_dir, entry, &sec, &off) != FFS_SUCCESS) + return NULL; + + buf = buf_getblk(sb, sec); + + if (buf == NULL) + return NULL; + + if (sector != NULL) + *sector = sec; + return((DENTRY_T *)(buf + off)); +} + +#define ES_MODE_STARTED 0 +#define ES_MODE_GET_FILE_ENTRY 1 +#define ES_MODE_GET_STRM_ENTRY 2 +#define ES_MODE_GET_NAME_ENTRY 3 +#define ES_MODE_GET_CRITICAL_SEC_ENTRY 4 +ENTRY_SET_CACHE_T *get_entry_set_in_dir (struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT32 type, DENTRY_T **file_ep) +{ + INT32 off, ret, byte_offset; + UINT32 clu=0; + UINT32 sec, entry_type; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + ENTRY_SET_CACHE_T *es = NULL; + DENTRY_T *ep, *pos; + UINT8 *buf; + UINT8 num_entries; + INT32 mode = ES_MODE_STARTED; + + PRINTK("get_entry_set_in_dir entered\n"); + PRINTK("p_dir dir %u flags %x size %d\n", p_dir->dir, p_dir->flags, p_dir->size); + + byte_offset = entry << DENTRY_SIZE_BITS; + ret =_walk_fat_chain(sb, p_dir, byte_offset, &clu); + if (ret != FFS_SUCCESS) + return NULL; + + + byte_offset &= p_fs->cluster_size - 1; + + off = byte_offset & p_bd->sector_size_mask; + sec = byte_offset >> p_bd->sector_size_bits; + sec += START_SECTOR(clu); + + buf = buf_getblk(sb, sec); + if (buf == NULL) + goto err_out; + + + ep = (DENTRY_T *)(buf + off); + entry_type = p_fs->fs_func->get_entry_type(ep); + + if ((entry_type != TYPE_FILE) + && (entry_type != TYPE_DIR)) + goto err_out; + + if (type == ES_ALL_ENTRIES) + num_entries = ((FILE_DENTRY_T *)ep)->num_ext+1; + else + num_entries = type; + + PRINTK("trying to malloc %x bytes for %d entries\n", offsetof(ENTRY_SET_CACHE_T, __buf) + (num_entries) * sizeof(DENTRY_T), num_entries); + es = MALLOC(offsetof(ENTRY_SET_CACHE_T, __buf) + (num_entries) * sizeof(DENTRY_T)); + if (es == NULL) + goto err_out; + + es->num_entries = num_entries; + es->sector = sec; + es->offset = off; + es->alloc_flag = p_dir->flags; + + pos = (DENTRY_T *) &(es->__buf); + + while(num_entries) { + + entry_type = p_fs->fs_func->get_entry_type(ep); + + if ((entry_type == TYPE_UNUSED) || (entry_type == TYPE_DELETED)) + goto err_out; + + switch(mode) { + case ES_MODE_STARTED: + if ((entry_type == TYPE_FILE) || (entry_type == TYPE_DIR)) + mode = ES_MODE_GET_FILE_ENTRY; + else + goto err_out; + break; + case ES_MODE_GET_FILE_ENTRY: + if (entry_type == TYPE_STREAM) + mode = ES_MODE_GET_STRM_ENTRY; + else + goto err_out; + break; + case ES_MODE_GET_STRM_ENTRY: + if (entry_type == TYPE_EXTEND) + mode = ES_MODE_GET_NAME_ENTRY; + else + goto err_out; + break; + case ES_MODE_GET_NAME_ENTRY: + if (entry_type == TYPE_EXTEND) + break; + else if (entry_type == TYPE_STREAM) + goto err_out; + else if (entry_type & TYPE_CRITICAL_SEC) + mode = ES_MODE_GET_CRITICAL_SEC_ENTRY; + else + goto err_out; + break; + case ES_MODE_GET_CRITICAL_SEC_ENTRY: + if ((entry_type == TYPE_EXTEND) || (entry_type == TYPE_STREAM)) + goto err_out; + else if ((entry_type & TYPE_CRITICAL_SEC) != TYPE_CRITICAL_SEC) + goto err_out; + break; + } + + COPY_DENTRY(pos, ep); + + if (--num_entries == 0) + break; + + if (((off + DENTRY_SIZE) & p_bd->sector_size_mask) < (off & p_bd->sector_size_mask)) { + if (IS_LAST_SECTOR_IN_CLUSTER(sec)) { + if (es->alloc_flag == 0x03) { + clu++; + } else { + if (FAT_read(sb, clu, &clu) == -1) + goto err_out; + } + sec = START_SECTOR(clu); + } else { + sec++; + } + buf = buf_getblk(sb, sec); + if (buf == NULL) + goto err_out; + off = 0; + ep = (DENTRY_T *)(buf); + } else { + ep++; + off += DENTRY_SIZE; + } + pos++; + } + + if (file_ep) + *file_ep = (DENTRY_T *)&(es->__buf); + + PRINTK("es sec %u offset %d flags %d, num_entries %u buf ptr %p\n", + es->sector, es->offset, es->alloc_flag, es->num_entries, &(es->__buf)); + PRINTK("get_entry_set_in_dir exited %p\n", es); + return es; +err_out: + PRINTK("get_entry_set_in_dir exited NULL (es %p)\n", es); + if (es) + FREE(es); + return NULL; +} + +void release_entry_set (ENTRY_SET_CACHE_T *es) +{ + PRINTK("release_entry_set %p\n", es); + FREE(es); +} + + +static INT32 __write_partial_entries_in_entry_set (struct super_block *sb, ENTRY_SET_CACHE_T *es, UINT32 sec, INT32 off, UINT32 count) +{ + INT32 num_entries, buf_off = (off - es->offset); + UINT32 remaining_byte_in_sector, copy_entries; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + UINT32 clu; + UINT8 *buf, *esbuf = (UINT8 *)&(es->__buf); + + PRINTK("__write_partial_entries_in_entry_set entered\n"); + PRINTK("es %p sec %u off %d count %d\n", es, sec, off, count); + num_entries = count; + + while(num_entries) { + remaining_byte_in_sector = (1 << p_bd->sector_size_bits) - off; + copy_entries = MIN(remaining_byte_in_sector>> DENTRY_SIZE_BITS , num_entries); + buf = buf_getblk(sb, sec); + if (buf == NULL) + goto err_out; + PRINTK("es->buf %p buf_off %u\n", esbuf, buf_off); + PRINTK("copying %d entries from %p to sector %u\n", copy_entries, (esbuf + buf_off), sec); + MEMCPY(buf + off, esbuf + buf_off, copy_entries << DENTRY_SIZE_BITS); + buf_modify(sb, sec); + num_entries -= copy_entries; + + if (num_entries) { + if (IS_LAST_SECTOR_IN_CLUSTER(sec)) { + clu = GET_CLUSTER_FROM_SECTOR(sec); + if (es->alloc_flag == 0x03) { + clu++; + } else { + if (FAT_read(sb, clu, &clu) == -1) + goto err_out; + } + sec = START_SECTOR(clu); + } else { + sec++; + } + off = 0; + buf_off += copy_entries << DENTRY_SIZE_BITS; + } + } + + PRINTK("__write_partial_entries_in_entry_set exited successfully\n"); + return FFS_SUCCESS; +err_out: + PRINTK("__write_partial_entries_in_entry_set failed\n"); + return FFS_ERROR; +} + +INT32 write_whole_entry_set (struct super_block *sb, ENTRY_SET_CACHE_T *es) +{ + return (__write_partial_entries_in_entry_set(sb, es, es->sector,es->offset, es->num_entries)); +} + +INT32 write_partial_entries_in_entry_set (struct super_block *sb, ENTRY_SET_CACHE_T *es, DENTRY_T *ep, UINT32 count) +{ + INT32 ret, byte_offset, off; + UINT32 clu=0, sec; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + CHAIN_T dir; + + if (ep + count > ((DENTRY_T *)&(es->__buf)) + es->num_entries) + return FFS_ERROR; + + dir.dir = GET_CLUSTER_FROM_SECTOR(es->sector); + dir.flags = es->alloc_flag; + dir.size = 0xffffffff; + + byte_offset = (es->sector - START_SECTOR(dir.dir)) << p_bd->sector_size_bits; + byte_offset += ((INT32)ep - (INT32)&(es->__buf)) + es->offset; + + ret =_walk_fat_chain(sb, &dir, byte_offset, &clu); + if (ret != FFS_SUCCESS) + return ret; + byte_offset &= p_fs->cluster_size - 1; + off = byte_offset & p_bd->sector_size_mask; + sec = byte_offset >> p_bd->sector_size_bits; + sec += START_SECTOR(clu); + return (__write_partial_entries_in_entry_set(sb, es, sec, off, count)); +} + +INT32 search_deleted_or_unused_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 num_entries) +{ + INT32 i, dentry, num_empty = 0; + INT32 dentries_per_clu; + UINT32 type; + CHAIN_T clu; + DENTRY_T *ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (p_dir->dir == CLUSTER_32(0)) + dentries_per_clu = p_fs->dentries_in_root; + else + dentries_per_clu = p_fs->dentries_per_clu; + + if (p_fs->hint_uentry.dir == p_dir->dir) { + if (p_fs->hint_uentry.entry == -1) + return -1; + + clu.dir = p_fs->hint_uentry.clu.dir; + clu.size = p_fs->hint_uentry.clu.size; + clu.flags = p_fs->hint_uentry.clu.flags; + + dentry = p_fs->hint_uentry.entry; + } else { + p_fs->hint_uentry.entry = -1; + + clu.dir = p_dir->dir; + clu.size = p_dir->size; + clu.flags = p_dir->flags; + + dentry = 0; + } + + while (clu.dir != CLUSTER_32(~0)) { + if (p_fs->dev_ejected) + break; + + if (p_dir->dir == CLUSTER_32(0)) + i = dentry % dentries_per_clu; + else + i = dentry & (dentries_per_clu-1); + + for ( ; i < dentries_per_clu; i++, dentry++) { + ep = get_entry_in_dir(sb, &clu, i, NULL); + if (!ep) + return -1; + + type = p_fs->fs_func->get_entry_type(ep); + + if (type == TYPE_UNUSED) { + num_empty++; + if (p_fs->hint_uentry.entry == -1) { + p_fs->hint_uentry.dir = p_dir->dir; + p_fs->hint_uentry.entry = dentry; + + p_fs->hint_uentry.clu.dir = clu.dir; + p_fs->hint_uentry.clu.size = clu.size; + p_fs->hint_uentry.clu.flags = clu.flags; + } + } else if (type == TYPE_DELETED) { + num_empty++; + } else { + num_empty = 0; + } + + if (num_empty >= num_entries) { + p_fs->hint_uentry.dir = CLUSTER_32(~0); + p_fs->hint_uentry.entry = -1; + + if (p_fs->vol_type == EXFAT) + return(dentry - (num_entries-1)); + else + return(dentry); + } + } + + if (p_dir->dir == CLUSTER_32(0)) + break; + + if (clu.flags == 0x03) { + if ((--clu.size) > 0) + clu.dir++; + else + clu.dir = CLUSTER_32(~0); + } else { + if (FAT_read(sb, clu.dir, &(clu.dir)) != 0) + return -1; + } + } + + return -1; +} + +INT32 find_empty_entry(struct inode *inode, CHAIN_T *p_dir, INT32 num_entries) +{ + INT32 ret, dentry; + UINT32 last_clu, sector; + UINT64 size = 0; + CHAIN_T clu; + DENTRY_T *ep = NULL; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + FILE_ID_T *fid = &(EXFAT_I(inode)->fid); + + if (p_dir->dir == CLUSTER_32(0)) + return(search_deleted_or_unused_entry(sb, p_dir, num_entries)); + + while ((dentry = search_deleted_or_unused_entry(sb, p_dir, num_entries)) < 0) { + if (p_fs->dev_ejected) + break; + + if (p_fs->vol_type == EXFAT) { + if (p_dir->dir != p_fs->root_dir) { + size = i_size_read(inode); + } + } + + last_clu = find_last_cluster(sb, p_dir); + clu.dir = last_clu + 1; + clu.size = 0; + clu.flags = p_dir->flags; + + ret = p_fs->fs_func->alloc_cluster(sb, 1, &clu); + if (ret < 1) + return -1; + + if (clear_cluster(sb, clu.dir) != FFS_SUCCESS) + return -1; + + if (clu.flags != p_dir->flags) { + exfat_chain_cont_cluster(sb, p_dir->dir, p_dir->size); + p_dir->flags = 0x01; + p_fs->hint_uentry.clu.flags = 0x01; + } + if (clu.flags == 0x01) + FAT_write(sb, last_clu, clu.dir); + + if (p_fs->hint_uentry.entry == -1) { + p_fs->hint_uentry.dir = p_dir->dir; + p_fs->hint_uentry.entry = p_dir->size << (p_fs->cluster_size_bits - DENTRY_SIZE_BITS); + + p_fs->hint_uentry.clu.dir = clu.dir; + p_fs->hint_uentry.clu.size = 0; + p_fs->hint_uentry.clu.flags = clu.flags; + } + p_fs->hint_uentry.clu.size++; + p_dir->size++; + + if (p_fs->vol_type == EXFAT) { + if (p_dir->dir != p_fs->root_dir) { + size += p_fs->cluster_size; + + ep = get_entry_in_dir(sb, &(fid->dir), fid->entry+1, §or); + if (!ep) + return -1; + p_fs->fs_func->set_entry_size(ep, size); + p_fs->fs_func->set_entry_flag(ep, p_dir->flags); + buf_modify(sb, sector); + + update_dir_checksum(sb, &(fid->dir), fid->entry); + } + } + + i_size_write(inode, i_size_read(inode)+p_fs->cluster_size); + EXFAT_I(inode)->mmu_private += p_fs->cluster_size; + EXFAT_I(inode)->fid.size += p_fs->cluster_size; + EXFAT_I(inode)->fid.flags = p_dir->flags; + inode->i_blocks += 1 << (p_fs->cluster_size_bits - 9); + } + + return(dentry); +} + +INT32 fat_find_dir_entry(struct super_block *sb, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, INT32 num_entries, DOS_NAME_T *p_dosname, UINT32 type) +{ + INT32 i, dentry = 0, lossy = FALSE, len; + INT32 order = 0, is_feasible_entry = TRUE, has_ext_entry = FALSE; + INT32 dentries_per_clu; + UINT32 entry_type; + UINT16 entry_uniname[14], *uniname = NULL, unichar; + CHAIN_T clu; + DENTRY_T *ep; + DOS_DENTRY_T *dos_ep; + EXT_DENTRY_T *ext_ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (p_dir->dir == p_fs->root_dir) { + if ((!nls_uniname_cmp(sb, p_uniname->name, (UINT16 *) UNI_CUR_DIR_NAME)) || + (!nls_uniname_cmp(sb, p_uniname->name, (UINT16 *) UNI_PAR_DIR_NAME))) + return -1; + } + + if (p_dir->dir == CLUSTER_32(0)) + dentries_per_clu = p_fs->dentries_in_root; + else + dentries_per_clu = p_fs->dentries_per_clu; + + clu.dir = p_dir->dir; + clu.flags = p_dir->flags; + + while (clu.dir != CLUSTER_32(~0)) { + if (p_fs->dev_ejected) + break; + + for (i = 0; i < dentries_per_clu; i++, dentry++) { + ep = get_entry_in_dir(sb, &clu, i, NULL); + if (!ep) + return -2; + + entry_type = p_fs->fs_func->get_entry_type(ep); + + if ((entry_type == TYPE_FILE) || (entry_type == TYPE_DIR)) { + if ((type == TYPE_ALL) || (type == entry_type)) { + if (is_feasible_entry && has_ext_entry) + return(dentry); + + dos_ep = (DOS_DENTRY_T *) ep; + if ((!lossy) && (!nls_dosname_cmp(sb, p_dosname->name, dos_ep->name))) + return(dentry); + } + is_feasible_entry = TRUE; + has_ext_entry = FALSE; + } else if (entry_type == TYPE_EXTEND) { + if (is_feasible_entry) { + ext_ep = (EXT_DENTRY_T *) ep; + if (ext_ep->order > 0x40) { + order = (INT32)(ext_ep->order - 0x40); + uniname = p_uniname->name + 13 * (order-1); + } else { + order = (INT32) ext_ep->order; + uniname -= 13; + } + + len = extract_uni_name_from_ext_entry(ext_ep, entry_uniname, order); + + unichar = *(uniname+len); + *(uniname+len) = 0x0; + + if (nls_uniname_cmp(sb, uniname, entry_uniname)) { + is_feasible_entry = FALSE; + } + + *(uniname+len) = unichar; + } + has_ext_entry = TRUE; + } else if (entry_type == TYPE_UNUSED) { + return -2; + } else { + is_feasible_entry = TRUE; + has_ext_entry = FALSE; + } + } + + if (p_dir->dir == CLUSTER_32(0)) + break; + + if (FAT_read(sb, clu.dir, &(clu.dir)) != 0) + return -2; + } + + return -2; +} + +INT32 exfat_find_dir_entry(struct super_block *sb, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, INT32 num_entries, DOS_NAME_T *p_dosname, UINT32 type) +{ + INT32 i, dentry = 0, num_ext_entries = 0, len; + INT32 order = 0, is_feasible_entry = FALSE; + INT32 dentries_per_clu, num_empty = 0; + UINT32 entry_type; + UINT16 entry_uniname[16], *uniname = NULL, unichar; + CHAIN_T clu; + DENTRY_T *ep; + FILE_DENTRY_T *file_ep; + STRM_DENTRY_T *strm_ep; + NAME_DENTRY_T *name_ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (p_dir->dir == p_fs->root_dir) { + if ((!nls_uniname_cmp(sb, p_uniname->name, (UINT16 *) UNI_CUR_DIR_NAME)) || + (!nls_uniname_cmp(sb, p_uniname->name, (UINT16 *) UNI_PAR_DIR_NAME))) + return -1; + } + + if (p_dir->dir == CLUSTER_32(0)) + dentries_per_clu = p_fs->dentries_in_root; + else + dentries_per_clu = p_fs->dentries_per_clu; + + clu.dir = p_dir->dir; + clu.size = p_dir->size; + clu.flags = p_dir->flags; + + p_fs->hint_uentry.dir = p_dir->dir; + p_fs->hint_uentry.entry = -1; + + while (clu.dir != CLUSTER_32(~0)) { + if (p_fs->dev_ejected) + break; + + for (i = 0; i < dentries_per_clu; i++, dentry++) { + ep = get_entry_in_dir(sb, &clu, i, NULL); + if (!ep) + return -2; + + entry_type = p_fs->fs_func->get_entry_type(ep); + + if ((entry_type == TYPE_UNUSED) || (entry_type == TYPE_DELETED)) { + is_feasible_entry = FALSE; + + if (p_fs->hint_uentry.entry == -1) { + num_empty++; + + if (num_empty == 1) { + p_fs->hint_uentry.clu.dir = clu.dir; + p_fs->hint_uentry.clu.size = clu.size; + p_fs->hint_uentry.clu.flags = clu.flags; + } + if ((num_empty >= num_entries) || (entry_type == TYPE_UNUSED)) { + p_fs->hint_uentry.entry = dentry - (num_empty-1); + } + } + + if (entry_type == TYPE_UNUSED) { + return -2; + } + } else { + num_empty = 0; + + if ((entry_type == TYPE_FILE) || (entry_type == TYPE_DIR)) { + if ((type == TYPE_ALL) || (type == entry_type)) { + file_ep = (FILE_DENTRY_T *) ep; + num_ext_entries = file_ep->num_ext; + is_feasible_entry = TRUE; + } else { + is_feasible_entry = FALSE; + } + } else if (entry_type == TYPE_STREAM) { + if (is_feasible_entry) { + strm_ep = (STRM_DENTRY_T *) ep; + if ((p_uniname->name_hash == GET16_A(strm_ep->name_hash)) && + (p_uniname->name_len == strm_ep->name_len)) { + order = 1; + } else { + is_feasible_entry = FALSE; + } + } + } else if (entry_type == TYPE_EXTEND) { + if (is_feasible_entry) { + name_ep = (NAME_DENTRY_T *) ep; + + if ((++order) == 2) + uniname = p_uniname->name; + else + uniname += 15; + + len = extract_uni_name_from_name_entry(name_ep, entry_uniname, order); + + unichar = *(uniname+len); + *(uniname+len) = 0x0; + + if (nls_uniname_cmp(sb, uniname, entry_uniname)) { + is_feasible_entry = FALSE; + } else if (order == num_ext_entries) { + p_fs->hint_uentry.dir = CLUSTER_32(~0); + p_fs->hint_uentry.entry = -1; + return(dentry - (num_ext_entries)); + } + + *(uniname+len) = unichar; + } + } else { + is_feasible_entry = FALSE; + } + } + } + + if (p_dir->dir == CLUSTER_32(0)) + break; + + if (clu.flags == 0x03) { + if ((--clu.size) > 0) + clu.dir++; + else + clu.dir = CLUSTER_32(~0); + } else { + if (FAT_read(sb, clu.dir, &(clu.dir)) != 0) + return -2; + } + } + + return -2; +} + +INT32 fat_count_ext_entries(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, DENTRY_T *p_entry) +{ + INT32 count = 0; + UINT8 chksum; + DOS_DENTRY_T *dos_ep = (DOS_DENTRY_T *) p_entry; + EXT_DENTRY_T *ext_ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + chksum = calc_checksum_1byte((void *) dos_ep->name, DOS_NAME_LENGTH, 0); + + for (entry--; entry >= 0; entry--) { + ext_ep = (EXT_DENTRY_T *) get_entry_in_dir(sb, p_dir, entry, NULL); + if (!ext_ep) + return -1; + + if ((p_fs->fs_func->get_entry_type((DENTRY_T *) ext_ep) == TYPE_EXTEND) && + (ext_ep->checksum == chksum)) { + count++; + if (ext_ep->order > 0x40) + return(count); + } else { + return(count); + } + } + + return(count); +} + +INT32 exfat_count_ext_entries(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, DENTRY_T *p_entry) +{ + INT32 i, count = 0; + UINT32 type; + FILE_DENTRY_T *file_ep = (FILE_DENTRY_T *) p_entry; + DENTRY_T *ext_ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + for (i = 0, entry++; i < file_ep->num_ext; i++, entry++) { + ext_ep = get_entry_in_dir(sb, p_dir, entry, NULL); + if (!ext_ep) + return -1; + + type = p_fs->fs_func->get_entry_type(ext_ep); + if ((type == TYPE_EXTEND) || (type == TYPE_STREAM)) { + count++; + } else { + return(count); + } + } + + return(count); +} + +INT32 count_dos_name_entries(struct super_block *sb, CHAIN_T *p_dir, UINT32 type) +{ + INT32 i, count = 0; + INT32 dentries_per_clu; + UINT32 entry_type; + CHAIN_T clu; + DENTRY_T *ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (p_dir->dir == CLUSTER_32(0)) + dentries_per_clu = p_fs->dentries_in_root; + else + dentries_per_clu = p_fs->dentries_per_clu; + + clu.dir = p_dir->dir; + clu.size = p_dir->size; + clu.flags = p_dir->flags; + + while (clu.dir != CLUSTER_32(~0)) { + if (p_fs->dev_ejected) + break; + + for (i = 0; i < dentries_per_clu; i++) { + ep = get_entry_in_dir(sb, &clu, i, NULL); + if (!ep) + return -1; + + entry_type = p_fs->fs_func->get_entry_type(ep); + + if (entry_type == TYPE_UNUSED) + return(count); + if (!(type & TYPE_CRITICAL_PRI) && !(type & TYPE_BENIGN_PRI)) + continue; + + if ((type == TYPE_ALL) || (type == entry_type)) + count++; + } + + if (p_dir->dir == CLUSTER_32(0)) + break; + + if (clu.flags == 0x03) { + if ((--clu.size) > 0) + clu.dir++; + else + clu.dir = CLUSTER_32(~0); + } else { + if (FAT_read(sb, clu.dir, &(clu.dir)) != 0) + return -1; + } + } + + return(count); +} + +BOOL is_dir_empty(struct super_block *sb, CHAIN_T *p_dir) +{ + INT32 i, count = 0; + INT32 dentries_per_clu; + UINT32 type; + CHAIN_T clu; + DENTRY_T *ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (p_dir->dir == CLUSTER_32(0)) + dentries_per_clu = p_fs->dentries_in_root; + else + dentries_per_clu = p_fs->dentries_per_clu; + + clu.dir = p_dir->dir; + clu.size = p_dir->size; + clu.flags = p_dir->flags; + + while (clu.dir != CLUSTER_32(~0)) { + if (p_fs->dev_ejected) + break; + + for (i = 0; i < dentries_per_clu; i++) { + ep = get_entry_in_dir(sb, &clu, i, NULL); + if (!ep) + break; + + type = p_fs->fs_func->get_entry_type(ep); + + if (type == TYPE_UNUSED) + return TRUE; + if ((type != TYPE_FILE) && (type != TYPE_DIR)) + continue; + + if (p_dir->dir == CLUSTER_32(0)) { + return FALSE; + } else { + if (p_fs->vol_type == EXFAT) + return FALSE; + if ((p_dir->dir == p_fs->root_dir) || ((++count) > 2)) + return FALSE; + } + } + + if (p_dir->dir == CLUSTER_32(0)) + break; + + if (clu.flags == 0x03) { + if ((--clu.size) > 0) + clu.dir++; + else + clu.dir = CLUSTER_32(~0); + } else { + if (FAT_read(sb, clu.dir, &(clu.dir)) != 0) + break; + } + } + + return TRUE; +} + +INT32 get_num_entries_and_dos_name(struct super_block *sb, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, INT32 *entries, DOS_NAME_T *p_dosname) +{ + INT32 ret, num_entries, lossy = FALSE; + INT8 **r; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + num_entries = p_fs->fs_func->calc_num_entries(p_uniname); + if (num_entries == 0) + return FFS_INVALIDPATH; + + if (p_fs->vol_type != EXFAT) { + nls_uniname_to_dosname(sb, p_dosname, p_uniname, &lossy); + + if (lossy) { + ret = fat_generate_dos_name(sb, p_dir, p_dosname); + if (ret) + return ret; + } else { + for (r = reserved_names; *r; r++) { + if (!STRNCMP((void *) p_dosname->name, *r, 8)) + return FFS_INVALIDPATH; + } + + if (p_dosname->name_case != 0xFF) + num_entries = 1; + } + + if (num_entries > 1) + p_dosname->name_case = 0x0; + } + + *entries = num_entries; + + return FFS_SUCCESS; +} + +void get_uni_name_from_dos_entry(struct super_block *sb, DOS_DENTRY_T *ep, UNI_NAME_T *p_uniname, UINT8 mode) +{ + DOS_NAME_T dos_name; + + if (mode == 0x0) + dos_name.name_case = 0x0; + else + dos_name.name_case = ep->lcase; + + MEMCPY(dos_name.name, ep->name, DOS_NAME_LENGTH); + nls_dosname_to_uniname(sb, p_uniname, &dos_name); +} + +void fat_get_uni_name_from_ext_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT16 *uniname) +{ + INT32 i; + EXT_DENTRY_T *ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + for (entry--, i = 1; entry >= 0; entry--, i++) { + ep = (EXT_DENTRY_T *) get_entry_in_dir(sb, p_dir, entry, NULL); + if (!ep) + return; + + if (p_fs->fs_func->get_entry_type((DENTRY_T *) ep) == TYPE_EXTEND) { + extract_uni_name_from_ext_entry(ep, uniname, i); + if (ep->order > 0x40) + return; + } else { + return; + } + + uniname += 13; + } +} + +void exfat_get_uni_name_from_ext_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT16 *uniname) +{ + INT32 i; + DENTRY_T *ep; + ENTRY_SET_CACHE_T *es; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + es = get_entry_set_in_dir(sb, p_dir, entry, ES_ALL_ENTRIES, &ep); + if (es == NULL || es->num_entries < 3) { + if(es) { + release_entry_set(es); + } + return; + } + + ep += 2; + + for (i = 2; i < es->num_entries; i++, ep++) { + if (p_fs->fs_func->get_entry_type(ep) == TYPE_EXTEND) { + extract_uni_name_from_name_entry((NAME_DENTRY_T *)ep, uniname, i); + } else { + goto out; + } + uniname += 15; + } + +out: + release_entry_set(es); +} + +INT32 extract_uni_name_from_ext_entry(EXT_DENTRY_T *ep, UINT16 *uniname, INT32 order) +{ + INT32 i, len = 0; + + for (i = 0; i < 10; i += 2) { + *uniname = GET16(ep->unicode_0_4+i); + if (*uniname == 0x0) + return(len); + uniname++; + len++; + } + + if (order < 20) { + for (i = 0; i < 12; i += 2) { + *uniname = GET16_A(ep->unicode_5_10+i); + if (*uniname == 0x0) + return(len); + uniname++; + len++; + } + } else { + for (i = 0; i < 8; i += 2) { + *uniname = GET16_A(ep->unicode_5_10+i); + if (*uniname == 0x0) + return(len); + uniname++; + len++; + } + *uniname = 0x0; + return(len); + } + + for (i = 0; i < 4; i += 2) { + *uniname = GET16_A(ep->unicode_11_12+i); + if (*uniname == 0x0) + return(len); + uniname++; + len++; + } + + *uniname = 0x0; + return(len); + +} + +INT32 extract_uni_name_from_name_entry(NAME_DENTRY_T *ep, UINT16 *uniname, INT32 order) +{ + INT32 i, len = 0; + + for (i = 0; i < 30; i += 2) { + *uniname = GET16_A(ep->unicode_0_14+i); + if (*uniname == 0x0) + return(len); + uniname++; + len++; + } + + *uniname = 0x0; + return(len); + +} + +INT32 fat_generate_dos_name(struct super_block *sb, CHAIN_T *p_dir, DOS_NAME_T *p_dosname) +{ + INT32 i, j, count = 0, count_begin = FALSE; + INT32 dentries_per_clu; + UINT32 type; + UINT8 bmap[128]; + CHAIN_T clu; + DOS_DENTRY_T *ep; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + Bitmap_clear_all(bmap, 128); + Bitmap_set(bmap, 0); + + if (p_dir->dir == CLUSTER_32(0)) + dentries_per_clu = p_fs->dentries_in_root; + else + dentries_per_clu = p_fs->dentries_per_clu; + + clu.dir = p_dir->dir; + clu.flags = p_dir->flags; + + while (clu.dir != CLUSTER_32(~0)) { + if (p_fs->dev_ejected) + break; + + for (i = 0; i < dentries_per_clu; i++) { + ep = (DOS_DENTRY_T *) get_entry_in_dir(sb, &clu, i, NULL); + if (!ep) + return FFS_MEDIAERR; + + type = p_fs->fs_func->get_entry_type((DENTRY_T *) ep); + + if (type == TYPE_UNUSED) + break; + if ((type != TYPE_FILE) && (type != TYPE_DIR)) + continue; + + count = 0; + count_begin = FALSE; + + for (j = 0; j < 8; j++) { + if (ep->name[j] == ' ') + break; + + if (ep->name[j] == '~') { + count_begin = TRUE; + } else if (count_begin) { + if ((ep->name[j] >= '0') && (ep->name[j] <= '9')) { + count = count * 10 + (ep->name[j] - '0'); + } else { + count = 0; + count_begin = FALSE; + } + } + } + + if ((count > 0) && (count < 1024)) + Bitmap_set(bmap, count); + } + + if (p_dir->dir == CLUSTER_32(0)) + break; + + if (FAT_read(sb, clu.dir, &(clu.dir)) != 0) + return FFS_MEDIAERR; + } + + count = 0; + for (i = 0; i < 128; i++) { + if (bmap[i] != 0xFF) { + for (j = 0; j < 8; j++) { + if (Bitmap_test(&(bmap[i]), j) == 0) { + count = (i << 3) + j; + break; + } + } + if (count != 0) + break; + } + } + + if ((count == 0) || (count >= 1024)) + return FFS_FILEEXIST; + else + fat_attach_count_to_dos_name(p_dosname->name, count); + + return FFS_SUCCESS; +} + +void fat_attach_count_to_dos_name(UINT8 *dosname, INT32 count) +{ + INT32 i, j, length; + INT8 str_count[6]; + + str_count[0] = '~'; + str_count[1] = '\0'; + my_itoa(&(str_count[1]), count); + length = STRLEN(str_count); + + i = j = 0; + while (j <= (8 - length)) { + i = j; + if (dosname[j] == ' ') + break; + if (dosname[j] & 0x80) + j += 2; + else + j++; + } + + for (j = 0; j < length; i++, j++) + dosname[i] = (UINT8) str_count[j]; + + if (i == 7) + dosname[7] = ' '; + +} + +INT32 fat_calc_num_entries(UNI_NAME_T *p_uniname) +{ + INT32 len; + + len = p_uniname->name_len; + if (len == 0) + return 0; + + return((len-1) / 13 + 2); + +} + +INT32 exfat_calc_num_entries(UNI_NAME_T *p_uniname) +{ + INT32 len; + + len = p_uniname->name_len; + if (len == 0) + return 0; + + return((len-1) / 15 + 3); + +} + +UINT8 calc_checksum_1byte(void *data, INT32 len, UINT8 chksum) +{ + INT32 i; + UINT8 *c = (UINT8 *) data; + + for (i = 0; i < len; i++, c++) + chksum = (((chksum & 1) << 7) | ((chksum & 0xFE) >> 1)) + *c; + + return(chksum); +} + +UINT16 calc_checksum_2byte(void *data, INT32 len, UINT16 chksum, INT32 type) +{ + INT32 i; + UINT8 *c = (UINT8 *) data; + + switch (type) { + case CS_DIR_ENTRY: + for (i = 0; i < len; i++, c++) { + if ((i == 2) || (i == 3)) + continue; + chksum = (((chksum & 1) << 15) | ((chksum & 0xFFFE) >> 1)) + (UINT16) *c; + } + break; + default + : + for (i = 0; i < len; i++, c++) { + chksum = (((chksum & 1) << 15) | ((chksum & 0xFFFE) >> 1)) + (UINT16) *c; + } + } + + return(chksum); +} + +UINT32 calc_checksum_4byte(void *data, INT32 len, UINT32 chksum, INT32 type) +{ + INT32 i; + UINT8 *c = (UINT8 *) data; + + switch (type) { + case CS_PBR_SECTOR: + for (i = 0; i < len; i++, c++) { + if ((i == 106) || (i == 107) || (i == 112)) + continue; + chksum = (((chksum & 1) << 31) | ((chksum & 0xFFFFFFFE) >> 1)) + (UINT32) *c; + } + break; + default + : + for (i = 0; i < len; i++, c++) { + chksum = (((chksum & 1) << 31) | ((chksum & 0xFFFFFFFE) >> 1)) + (UINT32) *c; + } + } + + return(chksum); +} + + +INT32 resolve_path(struct inode *inode, UINT8 *path, CHAIN_T *p_dir, UNI_NAME_T *p_uniname) +{ + INT32 lossy = FALSE; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + FILE_ID_T *fid = &(EXFAT_I(inode)->fid); + + if (STRLEN(path) >= (MAX_NAME_LENGTH * MAX_CHARSET_SIZE)) + return(FFS_INVALIDPATH); + + STRCPY(name_buf, path); + + nls_cstring_to_uniname(sb, p_uniname, name_buf, &lossy); + if (lossy) + return(FFS_INVALIDPATH); + + fid->size = i_size_read(inode); + + p_dir->dir = fid->start_clu; + p_dir->size = (INT32)(fid->size >> p_fs->cluster_size_bits); + p_dir->flags = fid->flags; + + return(FFS_SUCCESS); +} + + +static FS_FUNC_T fat_fs_func = { + .alloc_cluster = fat_alloc_cluster, + .free_cluster = fat_free_cluster, + .count_used_clusters = fat_count_used_clusters, + + .init_dir_entry = fat_init_dir_entry, + .init_ext_entry = fat_init_ext_entry, + .find_dir_entry = fat_find_dir_entry, + .delete_dir_entry = fat_delete_dir_entry, + .get_uni_name_from_ext_entry = fat_get_uni_name_from_ext_entry, + .count_ext_entries = fat_count_ext_entries, + .calc_num_entries = fat_calc_num_entries, + + .get_entry_type = fat_get_entry_type, + .set_entry_type = fat_set_entry_type, + .get_entry_attr = fat_get_entry_attr, + .set_entry_attr = fat_set_entry_attr, + .get_entry_flag = fat_get_entry_flag, + .set_entry_flag = fat_set_entry_flag, + .get_entry_clu0 = fat_get_entry_clu0, + .set_entry_clu0 = fat_set_entry_clu0, + .get_entry_size = fat_get_entry_size, + .set_entry_size = fat_set_entry_size, + .get_entry_time = fat_get_entry_time, + .set_entry_time = fat_set_entry_time, +}; + + +INT32 fat16_mount(struct super_block *sb, PBR_SECTOR_T *p_pbr) +{ + INT32 num_reserved, num_root_sectors; + BPB16_T *p_bpb = (BPB16_T *) p_pbr->bpb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + if (p_bpb->num_fats == 0) + return FFS_FORMATERR; + + num_root_sectors = GET16(p_bpb->num_root_entries) << DENTRY_SIZE_BITS; + num_root_sectors = ((num_root_sectors-1) >> p_bd->sector_size_bits) + 1; + + p_fs->sectors_per_clu = p_bpb->sectors_per_clu; + p_fs->sectors_per_clu_bits = my_log2(p_bpb->sectors_per_clu); + p_fs->cluster_size_bits = p_fs->sectors_per_clu_bits + p_bd->sector_size_bits; + p_fs->cluster_size = 1 << p_fs->cluster_size_bits; + + p_fs->num_FAT_sectors = GET16(p_bpb->num_fat_sectors); + + p_fs->FAT1_start_sector = p_fs->PBR_sector + GET16(p_bpb->num_reserved); + if (p_bpb->num_fats == 1) + p_fs->FAT2_start_sector = p_fs->FAT1_start_sector; + else + p_fs->FAT2_start_sector = p_fs->FAT1_start_sector + p_fs->num_FAT_sectors; + + p_fs->root_start_sector = p_fs->FAT2_start_sector + p_fs->num_FAT_sectors; + p_fs->data_start_sector = p_fs->root_start_sector + num_root_sectors; + + p_fs->num_sectors = GET16(p_bpb->num_sectors); + if (p_fs->num_sectors == 0) + p_fs->num_sectors = GET32(p_bpb->num_huge_sectors); + + num_reserved = p_fs->data_start_sector - p_fs->PBR_sector; + p_fs->num_clusters = ((p_fs->num_sectors - num_reserved) >> p_fs->sectors_per_clu_bits) + 2; + + if (p_fs->num_clusters < FAT12_THRESHOLD) + p_fs->vol_type = FAT12; + else + p_fs->vol_type = FAT16; + p_fs->vol_id = GET32(p_bpb->vol_serial); + + p_fs->root_dir = 0; + p_fs->dentries_in_root = GET16(p_bpb->num_root_entries); + p_fs->dentries_per_clu = 1 << (p_fs->cluster_size_bits - DENTRY_SIZE_BITS); + + p_fs->vol_flag = VOL_CLEAN; + p_fs->clu_srch_ptr = 2; + p_fs->used_clusters = (UINT32) ~0; + + p_fs->fs_func = &fat_fs_func; + + return FFS_SUCCESS; +} + +INT32 fat32_mount(struct super_block *sb, PBR_SECTOR_T *p_pbr) +{ + INT32 num_reserved; + BPB32_T *p_bpb = (BPB32_T *) p_pbr->bpb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + if (p_bpb->num_fats == 0) + return FFS_FORMATERR; + + p_fs->sectors_per_clu = p_bpb->sectors_per_clu; + p_fs->sectors_per_clu_bits = my_log2(p_bpb->sectors_per_clu); + p_fs->cluster_size_bits = p_fs->sectors_per_clu_bits + p_bd->sector_size_bits; + p_fs->cluster_size = 1 << p_fs->cluster_size_bits; + + p_fs->num_FAT_sectors = GET32(p_bpb->num_fat32_sectors); + + p_fs->FAT1_start_sector = p_fs->PBR_sector + GET16(p_bpb->num_reserved); + if (p_bpb->num_fats == 1) + p_fs->FAT2_start_sector = p_fs->FAT1_start_sector; + else + p_fs->FAT2_start_sector = p_fs->FAT1_start_sector + p_fs->num_FAT_sectors; + + p_fs->root_start_sector = p_fs->FAT2_start_sector + p_fs->num_FAT_sectors; + p_fs->data_start_sector = p_fs->root_start_sector; + + p_fs->num_sectors = GET32(p_bpb->num_huge_sectors); + num_reserved = p_fs->data_start_sector - p_fs->PBR_sector; + + p_fs->num_clusters = ((p_fs->num_sectors-num_reserved) >> p_fs->sectors_per_clu_bits) + 2; + + p_fs->vol_type = FAT32; + p_fs->vol_id = GET32(p_bpb->vol_serial); + + p_fs->root_dir = GET32(p_bpb->root_cluster); + p_fs->dentries_in_root = 0; + p_fs->dentries_per_clu = 1 << (p_fs->cluster_size_bits - DENTRY_SIZE_BITS); + + p_fs->vol_flag = VOL_CLEAN; + p_fs->clu_srch_ptr = 2; + p_fs->used_clusters = (UINT32) ~0; + + p_fs->fs_func = &fat_fs_func; + + return FFS_SUCCESS; +} + +static FS_FUNC_T exfat_fs_func = { + .alloc_cluster = exfat_alloc_cluster, + .free_cluster = exfat_free_cluster, + .count_used_clusters = exfat_count_used_clusters, + + .init_dir_entry = exfat_init_dir_entry, + .init_ext_entry = exfat_init_ext_entry, + .find_dir_entry = exfat_find_dir_entry, + .delete_dir_entry = exfat_delete_dir_entry, + .get_uni_name_from_ext_entry = exfat_get_uni_name_from_ext_entry, + .count_ext_entries = exfat_count_ext_entries, + .calc_num_entries = exfat_calc_num_entries, + + .get_entry_type = exfat_get_entry_type, + .set_entry_type = exfat_set_entry_type, + .get_entry_attr = exfat_get_entry_attr, + .set_entry_attr = exfat_set_entry_attr, + .get_entry_flag = exfat_get_entry_flag, + .set_entry_flag = exfat_set_entry_flag, + .get_entry_clu0 = exfat_get_entry_clu0, + .set_entry_clu0 = exfat_set_entry_clu0, + .get_entry_size = exfat_get_entry_size, + .set_entry_size = exfat_set_entry_size, + .get_entry_time = exfat_get_entry_time, + .set_entry_time = exfat_set_entry_time, +}; + +INT32 exfat_mount(struct super_block *sb, PBR_SECTOR_T *p_pbr) +{ + BPBEX_T *p_bpb = (BPBEX_T *) p_pbr->bpb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + if (p_bpb->num_fats == 0) + return FFS_FORMATERR; + + p_fs->sectors_per_clu = 1 << p_bpb->sectors_per_clu_bits; + p_fs->sectors_per_clu_bits = p_bpb->sectors_per_clu_bits; + p_fs->cluster_size_bits = p_fs->sectors_per_clu_bits + p_bd->sector_size_bits; + p_fs->cluster_size = 1 << p_fs->cluster_size_bits; + + p_fs->num_FAT_sectors = GET32(p_bpb->fat_length); + + p_fs->FAT1_start_sector = p_fs->PBR_sector + GET32(p_bpb->fat_offset); + if (p_bpb->num_fats == 1) + p_fs->FAT2_start_sector = p_fs->FAT1_start_sector; + else + p_fs->FAT2_start_sector = p_fs->FAT1_start_sector + p_fs->num_FAT_sectors; + + p_fs->root_start_sector = p_fs->PBR_sector + GET32(p_bpb->clu_offset); + p_fs->data_start_sector = p_fs->root_start_sector; + + p_fs->num_sectors = GET64(p_bpb->vol_length); + p_fs->num_clusters = GET32(p_bpb->clu_count) + 2; + + p_fs->vol_type = EXFAT; + p_fs->vol_id = GET32(p_bpb->vol_serial); + + p_fs->root_dir = GET32(p_bpb->root_cluster); + p_fs->dentries_in_root = 0; + p_fs->dentries_per_clu = 1 << (p_fs->cluster_size_bits - DENTRY_SIZE_BITS); + + p_fs->vol_flag = (UINT32) GET16(p_bpb->vol_flags); + p_fs->clu_srch_ptr = 2; + p_fs->used_clusters = (UINT32) ~0; + + p_fs->fs_func = &exfat_fs_func; + + return FFS_SUCCESS; +} + +INT32 create_dir(struct inode *inode, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, FILE_ID_T *fid) +{ + INT32 ret, dentry, num_entries; + UINT64 size; + CHAIN_T clu; + DOS_NAME_T dos_name, dot_name; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + ret = get_num_entries_and_dos_name(sb, p_dir, p_uniname, &num_entries, &dos_name); + if (ret) + return ret; + + dentry = find_empty_entry(inode, p_dir, num_entries); + if (dentry < 0) + return FFS_FULL; + + clu.dir = CLUSTER_32(~0); + clu.size = 0; + clu.flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01; + + ret = p_fs->fs_func->alloc_cluster(sb, 1, &clu); + if (ret < 1) + return FFS_FULL; + + ret = clear_cluster(sb, clu.dir); + if (ret != FFS_SUCCESS) + return ret; + + if (p_fs->vol_type == EXFAT) { + size = p_fs->cluster_size; + } else { + size = 0; + + dot_name.name_case = 0x0; + MEMCPY(dot_name.name, DOS_CUR_DIR_NAME, DOS_NAME_LENGTH); + + ret = p_fs->fs_func->init_dir_entry(sb, &clu, 0, TYPE_DIR, clu.dir, 0); + if (ret != FFS_SUCCESS) + return ret; + + ret = p_fs->fs_func->init_ext_entry(sb, &clu, 0, 1, NULL, &dot_name); + if (ret != FFS_SUCCESS) + return ret; + + MEMCPY(dot_name.name, DOS_PAR_DIR_NAME, DOS_NAME_LENGTH); + + if (p_dir->dir == p_fs->root_dir) + ret = p_fs->fs_func->init_dir_entry(sb, &clu, 1, TYPE_DIR, CLUSTER_32(0), 0); + else + ret = p_fs->fs_func->init_dir_entry(sb, &clu, 1, TYPE_DIR, p_dir->dir, 0); + + if (ret != FFS_SUCCESS) + return ret; + + ret = p_fs->fs_func->init_ext_entry(sb, &clu, 1, 1, NULL, &dot_name); + if (ret != FFS_SUCCESS) + return ret; + } + + ret = p_fs->fs_func->init_dir_entry(sb, p_dir, dentry, TYPE_DIR, clu.dir, size); + if (ret != FFS_SUCCESS) + return ret; + + ret = p_fs->fs_func->init_ext_entry(sb, p_dir, dentry, num_entries, p_uniname, &dos_name); + if (ret != FFS_SUCCESS) + return ret; + + fid->dir.dir = p_dir->dir; + fid->dir.size = p_dir->size; + fid->dir.flags = p_dir->flags; + fid->entry = dentry; + + fid->attr = ATTR_SUBDIR; + fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01; + fid->size = size; + fid->start_clu = clu.dir; + + fid->type= TYPE_DIR; + fid->rwoffset = 0; + fid->hint_last_off = -1; + + return FFS_SUCCESS; +} + +INT32 create_file(struct inode *inode, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, UINT8 mode, FILE_ID_T *fid) +{ + INT32 ret, dentry, num_entries; + DOS_NAME_T dos_name; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + ret = get_num_entries_and_dos_name(sb, p_dir, p_uniname, &num_entries, &dos_name); + if (ret) + return ret; + + dentry = find_empty_entry(inode, p_dir, num_entries); + if (dentry < 0) + return FFS_FULL; + + ret = p_fs->fs_func->init_dir_entry(sb, p_dir, dentry, TYPE_FILE | mode, CLUSTER_32(0), 0); + if (ret != FFS_SUCCESS) + return ret; + + ret = p_fs->fs_func->init_ext_entry(sb, p_dir, dentry, num_entries, p_uniname, &dos_name); + if (ret != FFS_SUCCESS) + return ret; + + fid->dir.dir = p_dir->dir; + fid->dir.size = p_dir->size; + fid->dir.flags = p_dir->flags; + fid->entry = dentry; + + fid->attr = ATTR_ARCHIVE | mode; + fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01; + fid->size = 0; + fid->start_clu = CLUSTER_32(~0); + + fid->type= TYPE_FILE; + fid->rwoffset = 0; + fid->hint_last_off = -1; + + return FFS_SUCCESS; +} + +void remove_file(struct inode *inode, CHAIN_T *p_dir, INT32 entry) +{ + INT32 num_entries; + UINT32 sector; + DENTRY_T *ep; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + ep = get_entry_in_dir(sb, p_dir, entry, §or); + if (!ep) + return; + + buf_lock(sb, sector); + + num_entries = p_fs->fs_func->count_ext_entries(sb, p_dir, entry, ep); + if (num_entries < 0) { + buf_unlock(sb, sector); + return; + } + num_entries++; + + buf_unlock(sb, sector); + + p_fs->fs_func->delete_dir_entry(sb, p_dir, entry, 0, num_entries); +} + +INT32 rename_file(struct inode *inode, CHAIN_T *p_dir, INT32 oldentry, UNI_NAME_T *p_uniname, FILE_ID_T *fid) +{ + INT32 ret, newentry = -1, num_old_entries, num_new_entries; + UINT32 sector_old, sector_new; + DOS_NAME_T dos_name; + DENTRY_T *epold, *epnew; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + epold = get_entry_in_dir(sb, p_dir, oldentry, §or_old); + if (!epold) + return FFS_MEDIAERR; + + buf_lock(sb, sector_old); + + num_old_entries = p_fs->fs_func->count_ext_entries(sb, p_dir, oldentry, epold); + if (num_old_entries < 0) { + buf_unlock(sb, sector_old); + return FFS_MEDIAERR; + } + num_old_entries++; + + ret = get_num_entries_and_dos_name(sb, p_dir, p_uniname, &num_new_entries, &dos_name); + if (ret) { + buf_unlock(sb, sector_old); + return ret; + } + + if (num_old_entries < num_new_entries) { + newentry = find_empty_entry(inode, p_dir, num_new_entries); + if (newentry < 0) { + buf_unlock(sb, sector_old); + return FFS_FULL; + } + + epnew = get_entry_in_dir(sb, p_dir, newentry, §or_new); + if (!epnew) { + buf_unlock(sb, sector_old); + return FFS_MEDIAERR; + } + + MEMCPY((void *) epnew, (void *) epold, DENTRY_SIZE); + if (p_fs->fs_func->get_entry_type(epnew) == TYPE_FILE) { + p_fs->fs_func->set_entry_attr(epnew, p_fs->fs_func->get_entry_attr(epnew) | ATTR_ARCHIVE); + fid->attr |= ATTR_ARCHIVE; + } + buf_modify(sb, sector_new); + buf_unlock(sb, sector_old); + + if (p_fs->vol_type == EXFAT) { + epold = get_entry_in_dir(sb, p_dir, oldentry+1, §or_old); + buf_lock(sb, sector_old); + epnew = get_entry_in_dir(sb, p_dir, newentry+1, §or_new); + + if (!epold || !epnew) { + buf_unlock(sb, sector_old); + return FFS_MEDIAERR; + } + + MEMCPY((void *) epnew, (void *) epold, DENTRY_SIZE); + buf_modify(sb, sector_new); + buf_unlock(sb, sector_old); + } + + ret = p_fs->fs_func->init_ext_entry(sb, p_dir, newentry, num_new_entries, p_uniname, &dos_name); + if (ret != FFS_SUCCESS) + return ret; + + p_fs->fs_func->delete_dir_entry(sb, p_dir, oldentry, 0, num_old_entries); + fid->entry = newentry; + } else { + if (p_fs->fs_func->get_entry_type(epold) == TYPE_FILE) { + p_fs->fs_func->set_entry_attr(epold, p_fs->fs_func->get_entry_attr(epold) | ATTR_ARCHIVE); + fid->attr |= ATTR_ARCHIVE; + } + buf_modify(sb, sector_old); + buf_unlock(sb, sector_old); + + ret = p_fs->fs_func->init_ext_entry(sb, p_dir, oldentry, num_new_entries, p_uniname, &dos_name); + if (ret != FFS_SUCCESS) + return ret; + + p_fs->fs_func->delete_dir_entry(sb, p_dir, oldentry, num_new_entries, num_old_entries); + } + + return FFS_SUCCESS; +} + +INT32 move_file(struct inode *inode, CHAIN_T *p_olddir, INT32 oldentry, CHAIN_T *p_newdir, UNI_NAME_T *p_uniname, FILE_ID_T *fid) +{ + INT32 ret, newentry, num_new_entries, num_old_entries; + UINT32 sector_mov, sector_new; + CHAIN_T clu; + DOS_NAME_T dos_name; + DENTRY_T *epmov, *epnew; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + epmov = get_entry_in_dir(sb, p_olddir, oldentry, §or_mov); + if (!epmov) + return FFS_MEDIAERR; + + if (p_fs->fs_func->get_entry_type(epmov) == TYPE_DIR && + p_fs->fs_func->get_entry_clu0(epmov) == p_newdir->dir) + return FFS_INVALIDPATH; + + buf_lock(sb, sector_mov); + + num_old_entries = p_fs->fs_func->count_ext_entries(sb, p_olddir, oldentry, epmov); + if (num_old_entries < 0) { + buf_unlock(sb, sector_mov); + return FFS_MEDIAERR; + } + num_old_entries++; + + ret = get_num_entries_and_dos_name(sb, p_newdir, p_uniname, &num_new_entries, &dos_name); + if (ret) { + buf_unlock(sb, sector_mov); + return ret; + } + + newentry = find_empty_entry(inode, p_newdir, num_new_entries); + if (newentry < 0) { + buf_unlock(sb, sector_mov); + return FFS_FULL; + } + + epnew = get_entry_in_dir(sb, p_newdir, newentry, §or_new); + if (!epnew) { + buf_unlock(sb, sector_mov); + return FFS_MEDIAERR; + } + + MEMCPY((void *) epnew, (void *) epmov, DENTRY_SIZE); + if (p_fs->fs_func->get_entry_type(epnew) == TYPE_FILE) { + p_fs->fs_func->set_entry_attr(epnew, p_fs->fs_func->get_entry_attr(epnew) | ATTR_ARCHIVE); + fid->attr |= ATTR_ARCHIVE; + } + buf_modify(sb, sector_new); + buf_unlock(sb, sector_mov); + + if (p_fs->vol_type == EXFAT) { + epmov = get_entry_in_dir(sb, p_olddir, oldentry+1, §or_mov); + buf_lock(sb, sector_mov); + epnew = get_entry_in_dir(sb, p_newdir, newentry+1, §or_new); + if (!epmov || !epnew) { + buf_unlock(sb, sector_mov); + return FFS_MEDIAERR; + } + + MEMCPY((void *) epnew, (void *) epmov, DENTRY_SIZE); + buf_modify(sb, sector_new); + buf_unlock(sb, sector_mov); + } else if (p_fs->fs_func->get_entry_type(epnew) == TYPE_DIR) { + clu.dir = p_fs->fs_func->get_entry_clu0(epnew); + clu.flags = 0x01; + + epnew = get_entry_in_dir(sb, &clu, 1, §or_new); + if (!epnew) + return FFS_MEDIAERR; + + if (p_newdir->dir == p_fs->root_dir) + p_fs->fs_func->set_entry_clu0(epnew, CLUSTER_32(0)); + else + p_fs->fs_func->set_entry_clu0(epnew, p_newdir->dir); + buf_modify(sb, sector_new); + } + + ret = p_fs->fs_func->init_ext_entry(sb, p_newdir, newentry, num_new_entries, p_uniname, &dos_name); + if (ret != FFS_SUCCESS) + return ret; + + p_fs->fs_func->delete_dir_entry(sb, p_olddir, oldentry, 0, num_old_entries); + + fid->dir.dir = p_newdir->dir; + fid->dir.size = p_newdir->size; + fid->dir.flags = p_newdir->flags; + + fid->entry = newentry; + + return FFS_SUCCESS; +} + +INT32 sector_read(struct super_block *sb, UINT32 sec, struct buffer_head **bh, INT32 read) +{ + INT32 ret = FFS_MEDIAERR; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if ((sec >= (p_fs->PBR_sector+p_fs->num_sectors)) && (p_fs->num_sectors > 0)) { + PRINT("[EXFAT] sector_read: out of range error! (sec = %d)\n", sec); + fs_error(sb); + return ret; + } + + if (!p_fs->dev_ejected) { + ret = bdev_read(sb, sec, bh, 1, read); + if (ret != FFS_SUCCESS) + p_fs->dev_ejected = TRUE; + } + + return ret; +} + +INT32 sector_write(struct super_block *sb, UINT32 sec, struct buffer_head *bh, INT32 sync) +{ + INT32 ret = FFS_MEDIAERR; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (sec >= (p_fs->PBR_sector+p_fs->num_sectors) && (p_fs->num_sectors > 0)) { + PRINT("[EXFAT] sector_write: out of range error! (sec = %d)\n", sec); + fs_error(sb); + return ret; + } + + if (bh == NULL) { + PRINT("[EXFAT] sector_write: bh is NULL!\n"); + fs_error(sb); + return ret; + } + + if (!p_fs->dev_ejected) { + ret = bdev_write(sb, sec, bh, 1, sync); + if (ret != FFS_SUCCESS) + p_fs->dev_ejected = TRUE; + } + + return ret; +} + +INT32 multi_sector_read(struct super_block *sb, UINT32 sec, struct buffer_head **bh, INT32 num_secs, INT32 read) +{ + INT32 ret = FFS_MEDIAERR; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (((sec+num_secs) > (p_fs->PBR_sector+p_fs->num_sectors)) && (p_fs->num_sectors > 0)) { + PRINT("[EXFAT] multi_sector_read: out of range error! (sec = %d, num_secs = %d)\n", sec, num_secs); + fs_error(sb); + return ret; + } + + if (!p_fs->dev_ejected) { + ret = bdev_read(sb, sec, bh, num_secs, read); + if (ret != FFS_SUCCESS) + p_fs->dev_ejected = TRUE; + } + + return ret; +} + +INT32 multi_sector_write(struct super_block *sb, UINT32 sec, struct buffer_head *bh, INT32 num_secs, INT32 sync) +{ + INT32 ret = FFS_MEDIAERR; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if ((sec+num_secs) > (p_fs->PBR_sector+p_fs->num_sectors) && (p_fs->num_sectors > 0)) { + PRINT("[EXFAT] multi_sector_write: out of range error! (sec = %d, num_secs = %d)\n", sec, num_secs); + fs_error(sb); + return ret; + } + if (bh == NULL) { + PRINT("[EXFAT] multi_sector_write: bh is NULL!\n"); + fs_error(sb); + return ret; + } + + if (!p_fs->dev_ejected) { + ret = bdev_write(sb, sec, bh, num_secs, sync); + if (ret != FFS_SUCCESS) + p_fs->dev_ejected = TRUE; + } + + return ret; +} diff --git a/drivers/staging/exfat/exfat.h b/drivers/staging/exfat/exfat.h new file mode 100644 index 0000000..0d3c841 --- /dev/null +++ b/drivers/staging/exfat/exfat.h @@ -0,0 +1,613 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef _EXFAT_H +#define _EXFAT_H + +#include "exfat_global.h" +#include "exfat_data.h" +#include "exfat_oal.h" + +#include "exfat_blkdev.h" +#include "exfat_cache.h" +#include "exfat_nls.h" +#include "exfat_api.h" +#include "exfat_cache.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef CONFIG_EXFAT_KERNEL_DEBUG +#define EXFAT_IOC_GET_DEBUGFLAGS _IOR('f', 100, long) +#define EXFAT_IOC_SET_DEBUGFLAGS _IOW('f', 101, long) + +#define EXFAT_DEBUGFLAGS_INVALID_UMOUNT 0x01 +#define EXFAT_DEBUGFLAGS_ERROR_RW 0x02 +#endif + +#define MAX_VOLUME 4 // max num of volumes per device + +#define DENTRY_SIZE 32 // dir entry size +#define DENTRY_SIZE_BITS 5 + +#define PBR_SIGNATURE 0xAA55 +#define EXT_SIGNATURE 0xAA550000 +#define VOL_LABEL "NO NAME " // size should be 11 +#define OEM_NAME "MSWIN4.1" // size should be 8 +#define STR_FAT12 "FAT12 " // size should be 8 +#define STR_FAT16 "FAT16 " // size should be 8 +#define STR_FAT32 "FAT32 " // size should be 8 +#define STR_EXFAT "EXFAT " // size should be 8 +#define VOL_CLEAN 0x0000 +#define VOL_DIRTY 0x0002 + +/* max number of clusters */ +#define FAT12_THRESHOLD 4087 // 2^12 - 1 + 2 (clu 0 & 1) +#define FAT16_THRESHOLD 65527 // 2^16 - 1 + 2 +#define FAT32_THRESHOLD 268435457 // 2^28 - 1 + 2 +#define EXFAT_THRESHOLD 268435457 // 2^28 - 1 + 2 + +#define TYPE_UNUSED 0x0000 +#define TYPE_DELETED 0x0001 +#define TYPE_INVALID 0x0002 +#define TYPE_CRITICAL_PRI 0x0100 +#define TYPE_BITMAP 0x0101 +#define TYPE_UPCASE 0x0102 +#define TYPE_VOLUME 0x0103 +#define TYPE_DIR 0x0104 +#define TYPE_FILE 0x011F +#define TYPE_SYMLINK 0x015F +#define TYPE_CRITICAL_SEC 0x0200 +#define TYPE_STREAM 0x0201 +#define TYPE_EXTEND 0x0202 +#define TYPE_ACL 0x0203 +#define TYPE_BENIGN_PRI 0x0400 +#define TYPE_GUID 0x0401 +#define TYPE_PADDING 0x0402 +#define TYPE_ACLTAB 0x0403 +#define TYPE_BENIGN_SEC 0x0800 +#define TYPE_ALL 0x0FFF + +#define TM_CREATE 0 +#define TM_MODIFY 1 +#define TM_ACCESS 2 + +#define CS_DIR_ENTRY 0 +#define CS_PBR_SECTOR 1 +#define CS_DEFAULT 2 + +#define CLUSTER_16(x) ((UINT16)(x)) +#define CLUSTER_32(x) ((UINT32)(x)) + +#define START_SECTOR(x) \ + ( (((x)-2) << p_fs->sectors_per_clu_bits) + p_fs->data_start_sector ) + +#define IS_LAST_SECTOR_IN_CLUSTER(sec) \ + ( (((sec) - p_fs->data_start_sector + 1) & ((1 << p_fs->sectors_per_clu_bits) -1)) == 0) + +#define GET_CLUSTER_FROM_SECTOR(sec) \ + ((((sec) - p_fs->data_start_sector) >> p_fs->sectors_per_clu_bits) +2) + +#define GET16(p_src) \ + ( ((UINT16)(p_src)[0]) | (((UINT16)(p_src)[1]) << 8) ) +#define GET32(p_src) \ + ( ((UINT32)(p_src)[0]) | (((UINT32)(p_src)[1]) << 8) | \ + (((UINT32)(p_src)[2]) << 16) | (((UINT32)(p_src)[3]) << 24) ) +#define GET64(p_src) \ + ( ((UINT64)(p_src)[0]) | (((UINT64)(p_src)[1]) << 8) | \ + (((UINT64)(p_src)[2]) << 16) | (((UINT64)(p_src)[3]) << 24) | \ + (((UINT64)(p_src)[4]) << 32) | (((UINT64)(p_src)[5]) << 40) | \ + (((UINT64)(p_src)[6]) << 48) | (((UINT64)(p_src)[7]) << 56) ) + + +#define SET16(p_dst,src) \ + do { \ + (p_dst)[0]=(UINT8)(src); \ + (p_dst)[1]=(UINT8)(((UINT16)(src)) >> 8); \ + } while (0) +#define SET32(p_dst,src) \ + do { \ + (p_dst)[0]=(UINT8)(src); \ + (p_dst)[1]=(UINT8)(((UINT32)(src)) >> 8); \ + (p_dst)[2]=(UINT8)(((UINT32)(src)) >> 16); \ + (p_dst)[3]=(UINT8)(((UINT32)(src)) >> 24); \ + } while (0) +#define SET64(p_dst,src) \ + do { \ + (p_dst)[0]=(UINT8)(src); \ + (p_dst)[1]=(UINT8)(((UINT64)(src)) >> 8); \ + (p_dst)[2]=(UINT8)(((UINT64)(src)) >> 16); \ + (p_dst)[3]=(UINT8)(((UINT64)(src)) >> 24); \ + (p_dst)[4]=(UINT8)(((UINT64)(src)) >> 32); \ + (p_dst)[5]=(UINT8)(((UINT64)(src)) >> 40); \ + (p_dst)[6]=(UINT8)(((UINT64)(src)) >> 48); \ + (p_dst)[7]=(UINT8)(((UINT64)(src)) >> 56); \ + } while (0) + +#ifdef CONFIG_EXFAT_LITTLE_ENDIAN +#define GET16_A(p_src) (*((UINT16 *)(p_src))) +#define GET32_A(p_src) (*((UINT32 *)(p_src))) +#define GET64_A(p_src) (*((UINT64 *)(p_src))) +#define SET16_A(p_dst,src) *((UINT16 *)(p_dst)) = (UINT16)(src) +#define SET32_A(p_dst,src) *((UINT32 *)(p_dst)) = (UINT32)(src) +#define SET64_A(p_dst,src) *((UINT64 *)(p_dst)) = (UINT64)(src) +#else +#define GET16_A(p_src) GET16(p_src) +#define GET32_A(p_src) GET32(p_src) +#define GET64_A(p_src) GET64(p_src) +#define SET16_A(p_dst,src) SET16(p_dst, src) +#define SET32_A(p_dst,src) SET32(p_dst, src) +#define SET64_A(p_dst,src) SET64(p_dst, src) +#endif + +#define HIGH_INDEX_BIT (8) +#define HIGH_INDEX_MASK (0xFF00) +#define LOW_INDEX_BIT (16-HIGH_INDEX_BIT) +#define UTBL_ROW_COUNT (1<<LOW_INDEX_BIT) +#define UTBL_COL_COUNT (1<<HIGH_INDEX_BIT) + + static inline UINT16 get_col_index(UINT16 i) + { + return i >> LOW_INDEX_BIT; + } + static inline UINT16 get_row_index(UINT16 i) + { + return i & ~HIGH_INDEX_MASK; + } + + /* MS_DOS FAT partition boot record (512 bytes) */ + typedef struct { + UINT8 jmp_boot[3]; + UINT8 oem_name[8]; + UINT8 bpb[109]; + UINT8 boot_code[390]; + UINT8 signature[2]; + } PBR_SECTOR_T; + + /* MS-DOS FAT12/16 BIOS parameter block (51 bytes) */ + typedef struct { + UINT8 sector_size[2]; + UINT8 sectors_per_clu; + UINT8 num_reserved[2]; + UINT8 num_fats; + UINT8 num_root_entries[2]; + UINT8 num_sectors[2]; + UINT8 media_type; + UINT8 num_fat_sectors[2]; + UINT8 sectors_in_track[2]; + UINT8 num_heads[2]; + UINT8 num_hid_sectors[4]; + UINT8 num_huge_sectors[4]; + + UINT8 phy_drv_no; + UINT8 reserved; + UINT8 ext_signature; + UINT8 vol_serial[4]; + UINT8 vol_label[11]; + UINT8 vol_type[8]; + } BPB16_T; + + /* MS-DOS FAT32 BIOS parameter block (79 bytes) */ + typedef struct { + UINT8 sector_size[2]; + UINT8 sectors_per_clu; + UINT8 num_reserved[2]; + UINT8 num_fats; + UINT8 num_root_entries[2]; + UINT8 num_sectors[2]; + UINT8 media_type; + UINT8 num_fat_sectors[2]; + UINT8 sectors_in_track[2]; + UINT8 num_heads[2]; + UINT8 num_hid_sectors[4]; + UINT8 num_huge_sectors[4]; + UINT8 num_fat32_sectors[4]; + UINT8 ext_flags[2]; + UINT8 fs_version[2]; + UINT8 root_cluster[4]; + UINT8 fsinfo_sector[2]; + UINT8 backup_sector[2]; + UINT8 reserved[12]; + + UINT8 phy_drv_no; + UINT8 ext_reserved; + UINT8 ext_signature; + UINT8 vol_serial[4]; + UINT8 vol_label[11]; + UINT8 vol_type[8]; + } BPB32_T; + + /* MS-DOS EXFAT BIOS parameter block (109 bytes) */ + typedef struct { + UINT8 reserved1[53]; + UINT8 vol_offset[8]; + UINT8 vol_length[8]; + UINT8 fat_offset[4]; + UINT8 fat_length[4]; + UINT8 clu_offset[4]; + UINT8 clu_count[4]; + UINT8 root_cluster[4]; + UINT8 vol_serial[4]; + UINT8 fs_version[2]; + UINT8 vol_flags[2]; + UINT8 sector_size_bits; + UINT8 sectors_per_clu_bits; + UINT8 num_fats; + UINT8 phy_drv_no; + UINT8 perc_in_use; + UINT8 reserved2[7]; + } BPBEX_T; + + /* MS-DOS FAT file system information sector (512 bytes) */ + typedef struct { + UINT8 signature1[4]; + UINT8 reserved1[480]; + UINT8 signature2[4]; + UINT8 free_cluster[4]; + UINT8 next_cluster[4]; + UINT8 reserved2[14]; + UINT8 signature3[2]; + } FSI_SECTOR_T; + + /* MS-DOS FAT directory entry (32 bytes) */ + typedef struct { + UINT8 dummy[32]; + } DENTRY_T; + + typedef struct { + UINT8 name[DOS_NAME_LENGTH]; + UINT8 attr; + UINT8 lcase; + UINT8 create_time_ms; + UINT8 create_time[2]; + UINT8 create_date[2]; + UINT8 access_date[2]; + UINT8 start_clu_hi[2]; + UINT8 modify_time[2]; + UINT8 modify_date[2]; + UINT8 start_clu_lo[2]; + UINT8 size[4]; + } DOS_DENTRY_T; + + /* MS-DOS FAT extended directory entry (32 bytes) */ + typedef struct { + UINT8 order; + UINT8 unicode_0_4[10]; + UINT8 attr; + UINT8 sysid; + UINT8 checksum; + UINT8 unicode_5_10[12]; + UINT8 start_clu[2]; + UINT8 unicode_11_12[4]; + } EXT_DENTRY_T; + + /* MS-DOS EXFAT file directory entry (32 bytes) */ + typedef struct { + UINT8 type; + UINT8 num_ext; + UINT8 checksum[2]; + UINT8 attr[2]; + UINT8 reserved1[2]; + UINT8 create_time[2]; + UINT8 create_date[2]; + UINT8 modify_time[2]; + UINT8 modify_date[2]; + UINT8 access_time[2]; + UINT8 access_date[2]; + UINT8 create_time_ms; + UINT8 modify_time_ms; + UINT8 access_time_ms; + UINT8 reserved2[9]; + } FILE_DENTRY_T; + + /* MS-DOS EXFAT stream extension directory entry (32 bytes) */ + typedef struct { + UINT8 type; + UINT8 flags; + UINT8 reserved1; + UINT8 name_len; + UINT8 name_hash[2]; + UINT8 reserved2[2]; + UINT8 valid_size[8]; + UINT8 reserved3[4]; + UINT8 start_clu[4]; + UINT8 size[8]; + } STRM_DENTRY_T; + + /* MS-DOS EXFAT file name directory entry (32 bytes) */ + typedef struct { + UINT8 type; + UINT8 flags; + UINT8 unicode_0_14[30]; + } NAME_DENTRY_T; + + /* MS-DOS EXFAT allocation bitmap directory entry (32 bytes) */ + typedef struct { + UINT8 type; + UINT8 flags; + UINT8 reserved[18]; + UINT8 start_clu[4]; + UINT8 size[8]; + } BMAP_DENTRY_T; + + /* MS-DOS EXFAT up-case table directory entry (32 bytes) */ + typedef struct { + UINT8 type; + UINT8 reserved1[3]; + UINT8 checksum[4]; + UINT8 reserved2[12]; + UINT8 start_clu[4]; + UINT8 size[8]; + } CASE_DENTRY_T; + + /* MS-DOS EXFAT volume label directory entry (32 bytes) */ + typedef struct { + UINT8 type; + UINT8 label_len; + UINT8 unicode_0_10[22]; + UINT8 reserved[8]; + } VOLM_DENTRY_T; + + /* unused entry hint information */ + typedef struct { + UINT32 dir; + INT32 entry; + CHAIN_T clu; + } UENTRY_T; + + /* file system volume information structure */ + typedef struct __FS_STRUCT_T { + UINT32 mounted; + struct super_block *sb; + struct semaphore v_sem; + } FS_STRUCT_T; + + typedef struct { + INT32 (*alloc_cluster)(struct super_block *sb, INT32 num_alloc, CHAIN_T *p_chain); + void (*free_cluster)(struct super_block *sb, CHAIN_T *p_chain, INT32 do_relse); + INT32 (*count_used_clusters)(struct super_block *sb); + + INT32 (*init_dir_entry)(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT32 type, + UINT32 start_clu, UINT64 size); + INT32 (*init_ext_entry)(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, INT32 num_entries, + UNI_NAME_T *p_uniname, DOS_NAME_T *p_dosname); + INT32 (*find_dir_entry)(struct super_block *sb, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, INT32 num_entries, DOS_NAME_T *p_dosname, UINT32 type); + void (*delete_dir_entry)(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, INT32 offset, INT32 num_entries); + void (*get_uni_name_from_ext_entry)(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT16 *uniname); + INT32 (*count_ext_entries)(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, DENTRY_T *p_entry); + INT32 (*calc_num_entries)(UNI_NAME_T *p_uniname); + + UINT32 (*get_entry_type)(DENTRY_T *p_entry); + void (*set_entry_type)(DENTRY_T *p_entry, UINT32 type); + UINT32 (*get_entry_attr)(DENTRY_T *p_entry); + void (*set_entry_attr)(DENTRY_T *p_entry, UINT32 attr); + UINT8 (*get_entry_flag)(DENTRY_T *p_entry); + void (*set_entry_flag)(DENTRY_T *p_entry, UINT8 flag); + UINT32 (*get_entry_clu0)(DENTRY_T *p_entry); + void (*set_entry_clu0)(DENTRY_T *p_entry, UINT32 clu0); + UINT64 (*get_entry_size)(DENTRY_T *p_entry); + void (*set_entry_size)(DENTRY_T *p_entry, UINT64 size); + void (*get_entry_time)(DENTRY_T *p_entry, TIMESTAMP_T *tp, UINT8 mode); + void (*set_entry_time)(DENTRY_T *p_entry, TIMESTAMP_T *tp, UINT8 mode); + } FS_FUNC_T; + + typedef struct __FS_INFO_T { + UINT32 drv; // drive ID + UINT32 vol_type; // volume FAT type + UINT32 vol_id; // volume serial number + + UINT32 num_sectors; // num of sectors in volume + UINT32 num_clusters; // num of clusters in volume + UINT32 cluster_size; // cluster size in bytes + UINT32 cluster_size_bits; + UINT32 sectors_per_clu; // cluster size in sectors + UINT32 sectors_per_clu_bits; + + UINT32 PBR_sector; // PBR sector + UINT32 FAT1_start_sector; // FAT1 start sector + UINT32 FAT2_start_sector; // FAT2 start sector + UINT32 root_start_sector; // root dir start sector + UINT32 data_start_sector; // data area start sector + UINT32 num_FAT_sectors; // num of FAT sectors + + UINT32 root_dir; // root dir cluster + UINT32 dentries_in_root; // num of dentries in root dir + UINT32 dentries_per_clu; // num of dentries per cluster + + UINT32 vol_flag; // volume dirty flag + struct buffer_head *pbr_bh; // PBR sector + + UINT32 map_clu; // allocation bitmap start cluster + UINT32 map_sectors; // num of allocation bitmap sectors + struct buffer_head **vol_amap; // allocation bitmap + + UINT16 **vol_utbl; // upcase table + + UINT32 clu_srch_ptr; // cluster search pointer + UINT32 used_clusters; // number of used clusters + UENTRY_T hint_uentry; // unused entry hint information + + UINT32 dev_ejected; // block device operation error flag + + FS_FUNC_T *fs_func; + + BUF_CACHE_T FAT_cache_array[FAT_CACHE_SIZE]; + BUF_CACHE_T FAT_cache_lru_list; + BUF_CACHE_T FAT_cache_hash_list[FAT_CACHE_HASH_SIZE]; + + BUF_CACHE_T buf_cache_array[BUF_CACHE_SIZE]; + BUF_CACHE_T buf_cache_lru_list; + BUF_CACHE_T buf_cache_hash_list[BUF_CACHE_HASH_SIZE]; + } FS_INFO_T; + +#define ES_2_ENTRIES 2 +#define ES_3_ENTRIES 3 +#define ES_ALL_ENTRIES 0 + + typedef struct { + UINT32 sector; // sector number that contains file_entry + INT32 offset; // byte offset in the sector + INT32 alloc_flag; // flag in stream entry. 01 for cluster chain, 03 for contig. clusteres. + UINT32 num_entries; + + void *__buf; + } ENTRY_SET_CACHE_T; + + INT32 ffsInit(void); + INT32 ffsShutdown(void); + + INT32 ffsMountVol(struct super_block *sb, INT32 drv); + INT32 ffsUmountVol(struct super_block *sb); + INT32 ffsCheckVol(struct super_block *sb); + INT32 ffsGetVolInfo(struct super_block *sb, VOL_INFO_T *info); + INT32 ffsSyncVol(struct super_block *sb, INT32 do_sync); + + INT32 ffsLookupFile(struct inode *inode, UINT8 *path, FILE_ID_T *fid); + INT32 ffsCreateFile(struct inode *inode, UINT8 *path, UINT8 mode, FILE_ID_T *fid); + INT32 ffsReadFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 count, UINT64 *rcount); + INT32 ffsWriteFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 count, UINT64 *wcount); + INT32 ffsTruncateFile(struct inode *inode, UINT64 old_size, UINT64 new_size); + INT32 ffsMoveFile(struct inode *old_parent_inode, FILE_ID_T *fid, struct inode *new_parent_inode, struct dentry *new_dentry); + INT32 ffsRemoveFile(struct inode *inode, FILE_ID_T *fid); + INT32 ffsSetAttr(struct inode *inode, UINT32 attr); + INT32 ffsGetStat(struct inode *inode, DIR_ENTRY_T *info); + INT32 ffsSetStat(struct inode *inode, DIR_ENTRY_T *info); + INT32 ffsMapCluster(struct inode *inode, INT32 clu_offset, UINT32 *clu); + + INT32 ffsCreateDir(struct inode *inode, UINT8 *path, FILE_ID_T *fid); + INT32 ffsReadDir(struct inode *inode, DIR_ENTRY_T *dir_ent); + INT32 ffsRemoveDir(struct inode *inode, FILE_ID_T *fid); + + INT32 fs_init(void); + INT32 fs_shutdown(void); + void fs_set_vol_flags(struct super_block *sb, UINT32 new_flag); + void fs_sync(struct super_block *sb, INT32 do_sync); + void fs_error(struct super_block *sb); + + INT32 clear_cluster(struct super_block *sb, UINT32 clu); + INT32 fat_alloc_cluster(struct super_block *sb, INT32 num_alloc, CHAIN_T *p_chain); + INT32 exfat_alloc_cluster(struct super_block *sb, INT32 num_alloc, CHAIN_T *p_chain); + void fat_free_cluster(struct super_block *sb, CHAIN_T *p_chain, INT32 do_relse); + void exfat_free_cluster(struct super_block *sb, CHAIN_T *p_chain, INT32 do_relse); + UINT32 find_last_cluster(struct super_block *sb, CHAIN_T *p_chain); + INT32 count_num_clusters(struct super_block *sb, CHAIN_T *dir); + INT32 fat_count_used_clusters(struct super_block *sb); + INT32 exfat_count_used_clusters(struct super_block *sb); + void exfat_chain_cont_cluster(struct super_block *sb, UINT32 chain, INT32 len); + + INT32 load_alloc_bitmap(struct super_block *sb); + void free_alloc_bitmap(struct super_block *sb); + INT32 set_alloc_bitmap(struct super_block *sb, UINT32 clu); + INT32 clr_alloc_bitmap(struct super_block *sb, UINT32 clu); + UINT32 test_alloc_bitmap(struct super_block *sb, UINT32 clu); + void sync_alloc_bitmap(struct super_block *sb); + + INT32 load_upcase_table(struct super_block *sb); + void free_upcase_table(struct super_block *sb); + + UINT32 fat_get_entry_type(DENTRY_T *p_entry); + UINT32 exfat_get_entry_type(DENTRY_T *p_entry); + void fat_set_entry_type(DENTRY_T *p_entry, UINT32 type); + void exfat_set_entry_type(DENTRY_T *p_entry, UINT32 type); + UINT32 fat_get_entry_attr(DENTRY_T *p_entry); + UINT32 exfat_get_entry_attr(DENTRY_T *p_entry); + void fat_set_entry_attr(DENTRY_T *p_entry, UINT32 attr); + void exfat_set_entry_attr(DENTRY_T *p_entry, UINT32 attr); + UINT8 fat_get_entry_flag(DENTRY_T *p_entry); + UINT8 exfat_get_entry_flag(DENTRY_T *p_entry); + void fat_set_entry_flag(DENTRY_T *p_entry, UINT8 flag); + void exfat_set_entry_flag(DENTRY_T *p_entry, UINT8 flag); + UINT32 fat_get_entry_clu0(DENTRY_T *p_entry); + UINT32 exfat_get_entry_clu0(DENTRY_T *p_entry); + void fat_set_entry_clu0(DENTRY_T *p_entry, UINT32 start_clu); + void exfat_set_entry_clu0(DENTRY_T *p_entry, UINT32 start_clu); + UINT64 fat_get_entry_size(DENTRY_T *p_entry); + UINT64 exfat_get_entry_size(DENTRY_T *p_entry); + void fat_set_entry_size(DENTRY_T *p_entry, UINT64 size); + void exfat_set_entry_size(DENTRY_T *p_entry, UINT64 size); + void fat_get_entry_time(DENTRY_T *p_entry, TIMESTAMP_T *tp, UINT8 mode); + void exfat_get_entry_time(DENTRY_T *p_entry, TIMESTAMP_T *tp, UINT8 mode); + void fat_set_entry_time(DENTRY_T *p_entry, TIMESTAMP_T *tp, UINT8 mode); + void exfat_set_entry_time(DENTRY_T *p_entry, TIMESTAMP_T *tp, UINT8 mode); + INT32 fat_init_dir_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT32 type, UINT32 start_clu, UINT64 size); + INT32 exfat_init_dir_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT32 type, UINT32 start_clu, UINT64 size); + INT32 fat_init_ext_dir_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, INT32 num_entries, UNI_NAME_T *p_uniname, DOS_NAME_T *p_dosname); + INT32 exfat_init_ext_dir_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, INT32 num_entries, UNI_NAME_T *p_uniname, DOS_NAME_T *p_dosname); + void init_dos_entry(DOS_DENTRY_T *ep, UINT32 type, UINT32 start_clu); + void init_ext_entry(EXT_DENTRY_T *ep, INT32 order, UINT8 chksum, UINT16 *uniname); + void init_file_entry(FILE_DENTRY_T *ep, UINT32 type); + void init_strm_entry(STRM_DENTRY_T *ep, UINT8 flags, UINT32 start_clu, UINT64 size); + void init_name_entry(NAME_DENTRY_T *ep, UINT16 *uniname); + void fat_delete_dir_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, INT32 order, INT32 num_entries); + void exfat_delete_dir_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, INT32 order, INT32 num_entries); + + INT32 find_location(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT32 *sector, INT32 *offset); + DENTRY_T *get_entry_with_sector(struct super_block *sb, UINT32 sector, INT32 offset); + DENTRY_T *get_entry_in_dir(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT32 *sector); + ENTRY_SET_CACHE_T *get_entry_set_in_dir (struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT32 type, DENTRY_T **file_ep); + void release_entry_set (ENTRY_SET_CACHE_T *es); + INT32 write_whole_entry_set (struct super_block *sb, ENTRY_SET_CACHE_T *es); + INT32 write_partial_entries_in_entry_set (struct super_block *sb, ENTRY_SET_CACHE_T *es, DENTRY_T *ep, UINT32 count); + INT32 search_deleted_or_unused_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 num_entries); + INT32 find_empty_entry(struct inode *inode, CHAIN_T *p_dir, INT32 num_entries); + INT32 fat_find_dir_entry(struct super_block *sb, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, INT32 num_entries, DOS_NAME_T *p_dosname, UINT32 type); + INT32 exfat_find_dir_entry(struct super_block *sb, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, INT32 num_entries, DOS_NAME_T *p_dosname, UINT32 type); + INT32 fat_count_ext_entries(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, DENTRY_T *p_entry); + INT32 exfat_count_ext_entries(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, DENTRY_T *p_entry); + INT32 count_dos_name_entries(struct super_block *sb, CHAIN_T *p_dir, UINT32 type); + void update_dir_checksum(struct super_block *sb, CHAIN_T *p_dir, INT32 entry); + void update_dir_checksum_with_entry_set (struct super_block *sb, ENTRY_SET_CACHE_T *es); + BOOL is_dir_empty(struct super_block *sb, CHAIN_T *p_dir); + + INT32 get_num_entries_and_dos_name(struct super_block *sb, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, INT32 *entries, DOS_NAME_T *p_dosname); + void get_uni_name_from_dos_entry(struct super_block *sb, DOS_DENTRY_T *ep, UNI_NAME_T *p_uniname, UINT8 mode); + void fat_get_uni_name_from_ext_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT16 *uniname); + void exfat_get_uni_name_from_ext_entry(struct super_block *sb, CHAIN_T *p_dir, INT32 entry, UINT16 *uniname); + INT32 extract_uni_name_from_ext_entry(EXT_DENTRY_T *ep, UINT16 *uniname, INT32 order); + INT32 extract_uni_name_from_name_entry(NAME_DENTRY_T *ep, UINT16 *uniname, INT32 order); + INT32 fat_generate_dos_name(struct super_block *sb, CHAIN_T *p_dir, DOS_NAME_T *p_dosname); + void fat_attach_count_to_dos_name(UINT8 *dosname, INT32 count); + INT32 fat_calc_num_entries(UNI_NAME_T *p_uniname); + INT32 exfat_calc_num_entries(UNI_NAME_T *p_uniname); + UINT8 calc_checksum_1byte(void *data, INT32 len, UINT8 chksum); + UINT16 calc_checksum_2byte(void *data, INT32 len, UINT16 chksum, INT32 type); + UINT32 calc_checksum_4byte(void *data, INT32 len, UINT32 chksum, INT32 type); + + INT32 resolve_path(struct inode *inode, UINT8 *path, CHAIN_T *p_dir, UNI_NAME_T *p_uniname); + INT32 resolve_name(UINT8 *name, UINT8 **arg); + + INT32 fat16_mount(struct super_block *sb, PBR_SECTOR_T *p_pbr); + INT32 fat32_mount(struct super_block *sb, PBR_SECTOR_T *p_pbr); + INT32 exfat_mount(struct super_block *sb, PBR_SECTOR_T *p_pbr); + INT32 create_dir(struct inode *inode, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, FILE_ID_T *fid); + INT32 create_file(struct inode *inode, CHAIN_T *p_dir, UNI_NAME_T *p_uniname, UINT8 mode, FILE_ID_T *fid); + void remove_file(struct inode *inode, CHAIN_T *p_dir, INT32 entry); + INT32 rename_file(struct inode *inode, CHAIN_T *p_dir, INT32 old_entry, UNI_NAME_T *p_uniname, FILE_ID_T *fid); + INT32 move_file(struct inode *inode, CHAIN_T *p_olddir, INT32 oldentry, CHAIN_T *p_newdir, UNI_NAME_T *p_uniname, FILE_ID_T *fid); + + INT32 sector_read(struct super_block *sb, UINT32 sec, struct buffer_head **bh, INT32 read); + INT32 sector_write(struct super_block *sb, UINT32 sec, struct buffer_head *bh, INT32 sync); + INT32 multi_sector_read(struct super_block *sb, UINT32 sec, struct buffer_head **bh, INT32 num_secs, INT32 read); + INT32 multi_sector_write(struct super_block *sb, UINT32 sec, struct buffer_head *bh, INT32 num_secs, INT32 sync); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/drivers/staging/exfat/exfat_api.c b/drivers/staging/exfat/exfat_api.c new file mode 100644 index 0000000..ea797b2 --- /dev/null +++ b/drivers/staging/exfat/exfat_api.c @@ -0,0 +1,458 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/init.h> + +#include "exfat_version.h" +#include "exfat_global.h" +#include "exfat_data.h" +#include "exfat_oal.h" + +#include "exfat_part.h" +#include "exfat_nls.h" +#include "exfat_api.h" +#include "exfat_super.h" +#include "exfat.h" + +extern FS_STRUCT_T fs_struct[]; + +extern struct semaphore z_sem; + +INT32 FsInit(void) +{ + INT32 i; + + /* initialize all volumes as un-mounted */ + for (i = 0; i < MAX_DRIVE; i++) { + fs_struct[i].mounted = FALSE; + fs_struct[i].sb = NULL; + sm_init(&(fs_struct[i].v_sem)); + } + + return(ffsInit()); +} + +INT32 FsShutdown(void) +{ + INT32 i; + + /* unmount all volumes */ + for (i = 0; i < MAX_DRIVE; i++) { + if (!fs_struct[i].mounted) continue; + + ffsUmountVol(fs_struct[i].sb); + } + + return(ffsShutdown()); +} + +INT32 FsMountVol(struct super_block *sb) +{ + INT32 err, drv; + + sm_P(&z_sem); + + for (drv = 0; drv < MAX_DRIVE; drv++) { + if (!fs_struct[drv].mounted) break; + } + + if (drv >= MAX_DRIVE) return(FFS_ERROR); + + sm_P(&(fs_struct[drv].v_sem)); + + err = buf_init(sb); + if (!err) { + err = ffsMountVol(sb, drv); + } + + sm_V(&(fs_struct[drv].v_sem)); + + if (!err) { + fs_struct[drv].mounted = TRUE; + fs_struct[drv].sb = sb; + } else { + buf_shutdown(sb); + } + + sm_V(&z_sem); + + return(err); +} + +INT32 FsUmountVol(struct super_block *sb) +{ + INT32 err; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + sm_P(&z_sem); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsUmountVol(sb); + buf_shutdown(sb); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + fs_struct[p_fs->drv].mounted = FALSE; + fs_struct[p_fs->drv].sb = NULL; + + sm_V(&z_sem); + + return(err); +} + +INT32 FsGetVolInfo(struct super_block *sb, VOL_INFO_T *info) +{ + INT32 err; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (info == NULL) return(FFS_ERROR); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsGetVolInfo(sb, info); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsSyncVol(struct super_block *sb, INT32 do_sync) +{ + INT32 err; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsSyncVol(sb, do_sync); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsLookupFile(struct inode *inode, UINT8 *path, FILE_ID_T *fid) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if ((fid == NULL) || (path == NULL) || (STRLEN(path) == 0)) + return(FFS_ERROR); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsLookupFile(inode, path, fid); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsCreateFile(struct inode *inode, UINT8 *path, UINT8 mode, FILE_ID_T *fid) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if ((fid == NULL) || (path == NULL) || (STRLEN(path) == 0)) + return(FFS_ERROR); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsCreateFile(inode, path, mode, fid); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsReadFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 count, UINT64 *rcount) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (fid == NULL) return(FFS_INVALIDFID); + + if (buffer == NULL) return(FFS_ERROR); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsReadFile(inode, fid, buffer, count, rcount); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsWriteFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 count, UINT64 *wcount) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (fid == NULL) return(FFS_INVALIDFID); + + if (buffer == NULL) return(FFS_ERROR); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsWriteFile(inode, fid, buffer, count, wcount); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsTruncateFile(struct inode *inode, UINT64 old_size, UINT64 new_size) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + PRINTK("FsTruncateFile entered (inode %p size %llu)\n", inode, new_size); + + err = ffsTruncateFile(inode, old_size, new_size); + + PRINTK("FsTruncateFile exitted (%d)\n", err); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsMoveFile(struct inode *old_parent_inode, FILE_ID_T *fid, struct inode *new_parent_inode, struct dentry *new_dentry) +{ + INT32 err; + struct super_block *sb = old_parent_inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (fid == NULL) return(FFS_INVALIDFID); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsMoveFile(old_parent_inode, fid, new_parent_inode, new_dentry); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsRemoveFile(struct inode *inode, FILE_ID_T *fid) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (fid == NULL) return(FFS_INVALIDFID); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsRemoveFile(inode, fid); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsSetAttr(struct inode *inode, UINT32 attr) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsSetAttr(inode, attr); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsReadStat(struct inode *inode, DIR_ENTRY_T *info) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsGetStat(inode, info); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsWriteStat(struct inode *inode, DIR_ENTRY_T *info) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + PRINTK("FsWriteStat entered (inode %p info %p\n", inode, info); + + err = ffsSetStat(inode, info); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + PRINTK("FsWriteStat exited (%d)\n", err); + + return(err); +} + +INT32 FsMapCluster(struct inode *inode, INT32 clu_offset, UINT32 *clu) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (clu == NULL) return(FFS_ERROR); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsMapCluster(inode, clu_offset, clu); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsCreateDir(struct inode *inode, UINT8 *path, FILE_ID_T *fid) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if ((fid == NULL) || (path == NULL) || (STRLEN(path) == 0)) + return(FFS_ERROR); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsCreateDir(inode, path, fid); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsReadDir(struct inode *inode, DIR_ENTRY_T *dir_entry) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (dir_entry == NULL) return(FFS_ERROR); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsReadDir(inode, dir_entry); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +INT32 FsRemoveDir(struct inode *inode, FILE_ID_T *fid) +{ + INT32 err; + struct super_block *sb = inode->i_sb; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (fid == NULL) return(FFS_INVALIDFID); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + err = ffsRemoveDir(inode, fid); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return(err); +} + +EXPORT_SYMBOL(FsMountVol); +EXPORT_SYMBOL(FsUmountVol); +EXPORT_SYMBOL(FsGetVolInfo); +EXPORT_SYMBOL(FsSyncVol); +EXPORT_SYMBOL(FsLookupFile); +EXPORT_SYMBOL(FsCreateFile); +EXPORT_SYMBOL(FsReadFile); +EXPORT_SYMBOL(FsWriteFile); +EXPORT_SYMBOL(FsTruncateFile); +EXPORT_SYMBOL(FsMoveFile); +EXPORT_SYMBOL(FsRemoveFile); +EXPORT_SYMBOL(FsSetAttr); +EXPORT_SYMBOL(FsReadStat); +EXPORT_SYMBOL(FsWriteStat); +EXPORT_SYMBOL(FsMapCluster); +EXPORT_SYMBOL(FsCreateDir); +EXPORT_SYMBOL(FsReadDir); +EXPORT_SYMBOL(FsRemoveDir); + +#ifdef CONFIG_EXFAT_KERNEL_DEBUG +INT32 FsReleaseCache(struct super_block *sb) +{ + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + sm_P(&(fs_struct[p_fs->drv].v_sem)); + + FAT_release_all(sb); + buf_release_all(sb); + + sm_V(&(fs_struct[p_fs->drv].v_sem)); + + return 0; +} + +EXPORT_SYMBOL(FsReleaseCache); +#endif + +static int __init init_exfat_core(void) +{ + int err; + + printk(KERN_INFO "exFAT: Core Version %s\n", EXFAT_VERSION); + + err = FsInit(); + if (err) { + if (err == FFS_MEMORYERR) + return -ENOMEM; + else + return -EIO; + } + + return 0; +} + +static void __exit exit_exfat_core(void) +{ + FsShutdown(); +} + +module_init(init_exfat_core); +module_exit(exit_exfat_core); + +MODULE_LICENSE("GPL"); diff --git a/drivers/staging/exfat/exfat_api.h b/drivers/staging/exfat/exfat_api.h new file mode 100644 index 0000000..ac2c768 --- /dev/null +++ b/drivers/staging/exfat/exfat_api.h @@ -0,0 +1,164 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef _EXFAT_API_H +#define _EXFAT_API_H + +#include "exfat_global.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define EXFAT_SUPER_MAGIC (0x2011BAB0L) +#define EXFAT_ROOT_INO 1 + +#define FAT12 0x01 +#define FAT16 0x0E +#define FAT32 0x0C +#define EXFAT 0x07 + +#define MAX_CHARSET_SIZE 3 /* max size of multi-byte character */ +#define MAX_PATH_DEPTH 15 /* max depth of path name */ +#define MAX_NAME_LENGTH 256 /* max len of file name including NULL */ +#define MAX_PATH_LENGTH 260 /* max len of path name including NULL */ +#define DOS_NAME_LENGTH 11 /* DOS file name length excluding NULL */ +#define DOS_PATH_LENGTH 80 /* DOS path name length excluding NULL */ + +#define ATTR_NORMAL 0x0000 +#define ATTR_READONLY 0x0001 +#define ATTR_HIDDEN 0x0002 +#define ATTR_SYSTEM 0x0004 +#define ATTR_VOLUME 0x0008 +#define ATTR_SUBDIR 0x0010 +#define ATTR_ARCHIVE 0x0020 +#define ATTR_SYMLINK 0x0040 +#define ATTR_EXTEND 0x000F +#define ATTR_RWMASK 0x007E + +#define FM_REGULAR 0x00 +#define FM_SYMLINK 0x40 + +#define FFS_SUCCESS 0 +#define FFS_MEDIAERR 1 +#define FFS_FORMATERR 2 +#define FFS_MOUNTED 3 +#define FFS_NOTMOUNTED 4 +#define FFS_ALIGNMENTERR 5 +#define FFS_SEMAPHOREERR 6 +#define FFS_INVALIDPATH 7 +#define FFS_INVALIDFID 8 +#define FFS_NOTFOUND 9 +#define FFS_FILEEXIST 10 +#define FFS_PERMISSIONERR 11 +#define FFS_NOTOPENED 12 +#define FFS_MAXOPENED 13 +#define FFS_FULL 14 +#define FFS_EOF 15 +#define FFS_DIRBUSY 16 +#define FFS_MEMORYERR 17 +#define FFS_NAMETOOLONG 18 +#define FFS_ERROR 19 + + typedef struct { + UINT16 Year; + UINT16 Month; + UINT16 Day; + UINT16 Hour; + UINT16 Minute; + UINT16 Second; + UINT16 MilliSecond; + } DATE_TIME_T; + + typedef struct { + UINT32 Offset; // start sector number of the partition + UINT32 Size; // in sectors + } PART_INFO_T; + + typedef struct { + UINT32 SecSize; // sector size in bytes + UINT32 DevSize; // block device size in sectors + } DEV_INFO_T; + + typedef struct { + UINT32 FatType; + UINT32 ClusterSize; + UINT32 NumClusters; + UINT32 FreeClusters; + UINT32 UsedClusters; + } VOL_INFO_T; + + typedef struct { + UINT32 dir; + INT32 size; + UINT8 flags; + } CHAIN_T; + + typedef struct { + CHAIN_T dir; + INT32 entry; + UINT32 type; + UINT32 attr; + UINT32 start_clu; + UINT64 size; + UINT8 flags; + INT64 rwoffset; + INT32 hint_last_off; + UINT32 hint_last_clu; + } FILE_ID_T; + + typedef struct { + INT8 Name[MAX_NAME_LENGTH *MAX_CHARSET_SIZE]; + INT8 ShortName[DOS_NAME_LENGTH + 2]; // used only for FAT12/16/32, not used for exFAT + UINT32 Attr; + UINT64 Size; + UINT32 NumSubdirs; + DATE_TIME_T CreateTimestamp; + DATE_TIME_T ModifyTimestamp; + DATE_TIME_T AccessTimestamp; + } DIR_ENTRY_T; + + INT32 FsInit(void); + INT32 FsShutdown(void); + + INT32 FsMountVol(struct super_block *sb); + INT32 FsUmountVol(struct super_block *sb); + INT32 FsGetVolInfo(struct super_block *sb, VOL_INFO_T *info); + INT32 FsSyncVol(struct super_block *sb, INT32 do_sync); + + INT32 FsLookupFile(struct inode *inode, UINT8 *path, FILE_ID_T *fid); + INT32 FsCreateFile(struct inode *inode, UINT8 *path, UINT8 mode, FILE_ID_T *fid); + INT32 FsReadFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 count, UINT64 *rcount); + INT32 FsWriteFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 count, UINT64 *wcount); + INT32 FsTruncateFile(struct inode *inode, UINT64 old_size, UINT64 new_size); + INT32 FsMoveFile(struct inode *old_parent_inode, FILE_ID_T *fid, struct inode *new_parent_inode, struct dentry *new_dentry); + INT32 FsRemoveFile(struct inode *inode, FILE_ID_T *fid); + INT32 FsSetAttr(struct inode *inode, UINT32 attr); + INT32 FsReadStat(struct inode *inode, DIR_ENTRY_T *info); + INT32 FsWriteStat(struct inode *inode, DIR_ENTRY_T *info); + INT32 FsMapCluster(struct inode *inode, INT32 clu_offset, UINT32 *clu); + + INT32 FsCreateDir(struct inode *inode, UINT8 *path, FILE_ID_T *fid); + INT32 FsReadDir(struct inode *inode, DIR_ENTRY_T *dir_entry); + INT32 FsRemoveDir(struct inode *inode, FILE_ID_T *fid); + + INT32 FsReleaseCache(struct super_block *sb); +#ifdef __cplusplus +} +#endif +#endif diff --git a/drivers/staging/exfat/exfat_blkdev.c b/drivers/staging/exfat/exfat_blkdev.c new file mode 100644 index 0000000..0f6358c --- /dev/null +++ b/drivers/staging/exfat/exfat_blkdev.c @@ -0,0 +1,155 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include <linux/blkdev.h> + +#include "exfat_global.h" +#include "exfat_blkdev.h" +#include "exfat_data.h" +#include "exfat_api.h" +#include "exfat_super.h" + +INT32 bdev_init(void) +{ + return(FFS_SUCCESS); +} + +INT32 bdev_shutdown(void) +{ + return(FFS_SUCCESS); +} + +INT32 bdev_open(struct super_block *sb) +{ + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + if (p_bd->opened) return(FFS_SUCCESS); + + p_bd->sector_size = bdev_logical_block_size(sb->s_bdev); + p_bd->sector_size_bits = my_log2(p_bd->sector_size); + p_bd->sector_size_mask = p_bd->sector_size - 1; + p_bd->num_sectors = i_size_read(sb->s_bdev->bd_inode) >> p_bd->sector_size_bits; + + p_bd->opened = TRUE; + + return(FFS_SUCCESS); +} + +INT32 bdev_close(struct super_block *sb) +{ + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + if (!p_bd->opened) return(FFS_SUCCESS); + + p_bd->opened = FALSE; + return(FFS_SUCCESS); +} + +INT32 bdev_read(struct super_block *sb, UINT32 secno, struct buffer_head **bh, UINT32 num_secs, INT32 read) +{ + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); +#ifdef CONFIG_EXFAT_KERNEL_DEBUG + struct exfat_sb_info *sbi = EXFAT_SB(sb); + long flags = sbi->debug_flags; + + if (flags & EXFAT_DEBUGFLAGS_ERROR_RW) return (FFS_MEDIAERR); +#endif + + if (!p_bd->opened) return(FFS_MEDIAERR); + + if (*bh) __brelse(*bh); + + if (read) + *bh = __bread(sb->s_bdev, secno, num_secs << p_bd->sector_size_bits); + else + *bh = __getblk(sb->s_bdev, secno, num_secs << p_bd->sector_size_bits); + + if (*bh) return(FFS_SUCCESS); + + WARN(!p_fs->dev_ejected, + "[EXFAT] No bh, device seems wrong or to be ejected.\n"); + + return(FFS_MEDIAERR); +} + +INT32 bdev_write(struct super_block *sb, UINT32 secno, struct buffer_head *bh, UINT32 num_secs, INT32 sync) +{ + INT32 count; + struct buffer_head *bh2; + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); +#ifdef CONFIG_EXFAT_KERNEL_DEBUG + struct exfat_sb_info *sbi = EXFAT_SB(sb); + long flags = sbi->debug_flags; + + if (flags & EXFAT_DEBUGFLAGS_ERROR_RW) return (FFS_MEDIAERR); +#endif + + if (!p_bd->opened) return(FFS_MEDIAERR); + + if (secno == bh->b_blocknr) { + lock_buffer(bh); + set_buffer_uptodate(bh); + mark_buffer_dirty(bh); + unlock_buffer(bh); + if (sync && (sync_dirty_buffer(bh) != 0)) + return (FFS_MEDIAERR); + } else { + count = num_secs << p_bd->sector_size_bits; + + bh2 = __getblk(sb->s_bdev, secno, count); + + if (bh2 == NULL) + goto no_bh; + + lock_buffer(bh2); + MEMCPY(bh2->b_data, bh->b_data, count); + set_buffer_uptodate(bh2); + mark_buffer_dirty(bh2); + unlock_buffer(bh2); + if (sync && (sync_dirty_buffer(bh2) != 0)) { + __brelse(bh2); + goto no_bh; + } + __brelse(bh2); + } + + return(FFS_SUCCESS); + +no_bh: + WARN(!p_fs->dev_ejected, + "[EXFAT] No bh, device seems wrong or to be ejected.\n"); + + return (FFS_MEDIAERR); +} + +INT32 bdev_sync(struct super_block *sb) +{ + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); +#ifdef CONFIG_EXFAT_KERNEL_DEBUG + struct exfat_sb_info *sbi = EXFAT_SB(sb); + long flags = sbi->debug_flags; + + if (flags & EXFAT_DEBUGFLAGS_ERROR_RW) return (FFS_MEDIAERR); +#endif + + if (!p_bd->opened) return(FFS_MEDIAERR); + + return sync_blockdev(sb->s_bdev); +} diff --git a/drivers/staging/exfat/exfat_blkdev.h b/drivers/staging/exfat/exfat_blkdev.h new file mode 100644 index 0000000..50941b9 --- /dev/null +++ b/drivers/staging/exfat/exfat_blkdev.h @@ -0,0 +1,45 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef _EXFAT_BLKDEV_H +#define _EXFAT_BLKDEV_H + +#include "exfat_global.h" + +#ifdef __cplusplus +extern "C" { +#endif + typedef struct __BD_INFO_T { + INT32 sector_size; + INT32 sector_size_bits; + INT32 sector_size_mask; + INT32 num_sectors; + BOOL opened; + } BD_INFO_T; + + INT32 bdev_init(void); + INT32 bdev_shutdown(void); + INT32 bdev_open(struct super_block *sb); + INT32 bdev_close(struct super_block *sb); + INT32 bdev_read(struct super_block *sb, UINT32 secno, struct buffer_head **bh, UINT32 num_secs, INT32 read); + INT32 bdev_write(struct super_block *sb, UINT32 secno, struct buffer_head *bh, UINT32 num_secs, INT32 sync); + INT32 bdev_sync(struct super_block *sb); +#ifdef __cplusplus +} +#endif +#endif diff --git a/drivers/staging/exfat/exfat_cache.c b/drivers/staging/exfat/exfat_cache.c new file mode 100644 index 0000000..79988ee --- /dev/null +++ b/drivers/staging/exfat/exfat_cache.c @@ -0,0 +1,741 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include "exfat_global.h" +#include "exfat_data.h" + +#include "exfat_cache.h" +#include "exfat_super.h" +#include "exfat.h" + +extern FS_STRUCT_T fs_struct[]; + +#define sm_P(s) +#define sm_V(s) + +static INT32 __FAT_read(struct super_block *sb, UINT32 loc, UINT32 *content); +static INT32 __FAT_write(struct super_block *sb, UINT32 loc, UINT32 content); + +static BUF_CACHE_T *FAT_cache_find(struct super_block *sb, UINT32 sec); +static BUF_CACHE_T *FAT_cache_get(struct super_block *sb, UINT32 sec); +static void FAT_cache_insert_hash(struct super_block *sb, BUF_CACHE_T *bp); +static void FAT_cache_remove_hash(BUF_CACHE_T *bp); + +static UINT8 *__buf_getblk(struct super_block *sb, UINT32 sec); + +static BUF_CACHE_T *buf_cache_find(struct super_block *sb, UINT32 sec); +static BUF_CACHE_T *buf_cache_get(struct super_block *sb, UINT32 sec); +static void buf_cache_insert_hash(struct super_block *sb, BUF_CACHE_T *bp); +static void buf_cache_remove_hash(BUF_CACHE_T *bp); + +static void push_to_mru(BUF_CACHE_T *bp, BUF_CACHE_T *list); +static void push_to_lru(BUF_CACHE_T *bp, BUF_CACHE_T *list); +static void move_to_mru(BUF_CACHE_T *bp, BUF_CACHE_T *list); +static void move_to_lru(BUF_CACHE_T *bp, BUF_CACHE_T *list); + +INT32 buf_init(struct super_block *sb) +{ + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + INT32 i; + + /* LRU list */ + p_fs->FAT_cache_lru_list.next = p_fs->FAT_cache_lru_list.prev = &p_fs->FAT_cache_lru_list; + + for (i = 0; i < FAT_CACHE_SIZE; i++) { + p_fs->FAT_cache_array[i].drv = -1; + p_fs->FAT_cache_array[i].sec = ~0; + p_fs->FAT_cache_array[i].flag = 0; + p_fs->FAT_cache_array[i].buf_bh = NULL; + p_fs->FAT_cache_array[i].prev = p_fs->FAT_cache_array[i].next = NULL; + push_to_mru(&(p_fs->FAT_cache_array[i]), &p_fs->FAT_cache_lru_list); + } + + p_fs->buf_cache_lru_list.next = p_fs->buf_cache_lru_list.prev = &p_fs->buf_cache_lru_list; + + for (i = 0; i < BUF_CACHE_SIZE; i++) { + p_fs->buf_cache_array[i].drv = -1; + p_fs->buf_cache_array[i].sec = ~0; + p_fs->buf_cache_array[i].flag = 0; + p_fs->buf_cache_array[i].buf_bh = NULL; + p_fs->buf_cache_array[i].prev = p_fs->buf_cache_array[i].next = NULL; + push_to_mru(&(p_fs->buf_cache_array[i]), &p_fs->buf_cache_lru_list); + } + + /* HASH list */ + for (i = 0; i < FAT_CACHE_HASH_SIZE; i++) { + p_fs->FAT_cache_hash_list[i].drv = -1; + p_fs->FAT_cache_hash_list[i].sec = ~0; + p_fs->FAT_cache_hash_list[i].hash_next = p_fs->FAT_cache_hash_list[i].hash_prev = &(p_fs->FAT_cache_hash_list[i]); + } + + for (i = 0; i < FAT_CACHE_SIZE; i++) { + FAT_cache_insert_hash(sb, &(p_fs->FAT_cache_array[i])); + } + + for (i = 0; i < BUF_CACHE_HASH_SIZE; i++) { + p_fs->buf_cache_hash_list[i].drv = -1; + p_fs->buf_cache_hash_list[i].sec = ~0; + p_fs->buf_cache_hash_list[i].hash_next = p_fs->buf_cache_hash_list[i].hash_prev = &(p_fs->buf_cache_hash_list[i]); + } + + for (i = 0; i < BUF_CACHE_SIZE; i++) { + buf_cache_insert_hash(sb, &(p_fs->buf_cache_array[i])); + } + + return(FFS_SUCCESS); +} + +INT32 buf_shutdown(struct super_block *sb) +{ + return(FFS_SUCCESS); +} + +INT32 FAT_read(struct super_block *sb, UINT32 loc, UINT32 *content) +{ + INT32 ret; + + sm_P(&f_sem); + + ret = __FAT_read(sb, loc, content); + + sm_V(&f_sem); + + return(ret); +} + +INT32 FAT_write(struct super_block *sb, UINT32 loc, UINT32 content) +{ + INT32 ret; + + sm_P(&f_sem); + + ret = __FAT_write(sb, loc, content); + + sm_V(&f_sem); + + return(ret); +} + +static INT32 __FAT_read(struct super_block *sb, UINT32 loc, UINT32 *content) +{ + INT32 off; + UINT32 sec, _content; + UINT8 *fat_sector, *fat_entry; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + if (p_fs->vol_type == FAT12) { + sec = p_fs->FAT1_start_sector + ((loc + (loc >> 1)) >> p_bd->sector_size_bits); + off = (loc + (loc >> 1)) & p_bd->sector_size_mask; + + if (off == (p_bd->sector_size-1)) { + fat_sector = FAT_getblk(sb, sec); + if (!fat_sector) + return -1; + + _content = (UINT32) fat_sector[off]; + + fat_sector = FAT_getblk(sb, ++sec); + if (!fat_sector) + return -1; + + _content |= (UINT32) fat_sector[0] << 8; + } else { + fat_sector = FAT_getblk(sb, sec); + if (!fat_sector) + return -1; + + fat_entry = &(fat_sector[off]); + _content = GET16(fat_entry); + } + + if (loc & 1) _content >>= 4; + + _content &= 0x00000FFF; + + if (_content >= CLUSTER_16(0x0FF8)) { + *content = CLUSTER_32(~0); + return 0; + } else { + *content = CLUSTER_32(_content); + return 0; + } + } else if (p_fs->vol_type == FAT16) { + sec = p_fs->FAT1_start_sector + (loc >> (p_bd->sector_size_bits-1)); + off = (loc << 1) & p_bd->sector_size_mask; + + fat_sector = FAT_getblk(sb, sec); + if + (!fat_sector) + return -1; + + fat_entry = &(fat_sector[off]); + + _content = GET16_A(fat_entry); + + _content &= 0x0000FFFF; + + if (_content >= CLUSTER_16(0xFFF8)) { + *content = CLUSTER_32(~0); + return 0; + } else { + *content = CLUSTER_32(_content); + return 0; + } + } else if (p_fs->vol_type == FAT32) { + sec = p_fs->FAT1_start_sector + (loc >> (p_bd->sector_size_bits-2)); + off = (loc << 2) & p_bd->sector_size_mask; + + fat_sector = FAT_getblk(sb, sec); + if (!fat_sector) + return -1; + + fat_entry = &(fat_sector[off]); + + _content = GET32_A(fat_entry); + + _content &= 0x0FFFFFFF; + + if (_content >= CLUSTER_32(0x0FFFFFF8)) { + *content = CLUSTER_32(~0); + return 0; + } else { + *content = CLUSTER_32(_content); + return 0; + } + } else { + sec = p_fs->FAT1_start_sector + (loc >> (p_bd->sector_size_bits-2)); + off = (loc << 2) & p_bd->sector_size_mask; + + fat_sector = FAT_getblk(sb, sec); + if (!fat_sector) + return -1; + + fat_entry = &(fat_sector[off]); + _content = GET32_A(fat_entry); + + if (_content >= CLUSTER_32(0xFFFFFFF8)) { + *content = CLUSTER_32(~0); + return 0; + } else { + *content = CLUSTER_32(_content); + return 0; + } + } + + *content = CLUSTER_32(~0); + return 0; +} + +static INT32 __FAT_write(struct super_block *sb, UINT32 loc, UINT32 content) +{ + INT32 off; + UINT32 sec; + UINT8 *fat_sector, *fat_entry; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + + if (p_fs->vol_type == FAT12) { + + content &= 0x00000FFF; + + sec = p_fs->FAT1_start_sector + ((loc + (loc >> 1)) >> p_bd->sector_size_bits); + off = (loc + (loc >> 1)) & p_bd->sector_size_mask; + + fat_sector = FAT_getblk(sb, sec); + if (!fat_sector) + return -1; + + if (loc & 1) { + + content <<= 4; + + if (off == (p_bd->sector_size-1)) { + fat_sector[off] = (UINT8)(content | (fat_sector[off] & 0x0F)); + FAT_modify(sb, sec); + + fat_sector = FAT_getblk(sb, ++sec); + if (!fat_sector) + return -1; + + fat_sector[0] = (UINT8)(content >> 8); + } else { + fat_entry = &(fat_sector[off]); + content |= GET16(fat_entry) & 0x000F; + + SET16(fat_entry, content); + } + } else { + fat_sector[off] = (UINT8)(content); + + if (off == (p_bd->sector_size-1)) { + fat_sector[off] = (UINT8)(content); + FAT_modify(sb, sec); + + fat_sector = FAT_getblk(sb, ++sec); + fat_sector[0] = (UINT8)((fat_sector[0] & 0xF0) | (content >> 8)); + } else { + fat_entry = &(fat_sector[off]); + content |= GET16(fat_entry) & 0xF000; + + SET16(fat_entry, content); + } + } + } + + else if (p_fs->vol_type == FAT16) { + + content &= 0x0000FFFF; + + sec = p_fs->FAT1_start_sector + (loc >> (p_bd->sector_size_bits-1)); + off = (loc << 1) & p_bd->sector_size_mask; + + fat_sector = FAT_getblk(sb, sec); + if (!fat_sector) + return -1; + + fat_entry = &(fat_sector[off]); + + SET16_A(fat_entry, content); + } + + else if (p_fs->vol_type == FAT32) { + + content &= 0x0FFFFFFF; + + sec = p_fs->FAT1_start_sector + (loc >> (p_bd->sector_size_bits-2)); + off = (loc << 2) & p_bd->sector_size_mask; + + fat_sector = FAT_getblk(sb, sec); + if (!fat_sector) + return -1; + + fat_entry = &(fat_sector[off]); + + content |= GET32_A(fat_entry) & 0xF0000000; + + SET32_A(fat_entry, content); + } + + else { + + sec = p_fs->FAT1_start_sector + (loc >> (p_bd->sector_size_bits-2)); + off = (loc << 2) & p_bd->sector_size_mask; + + fat_sector = FAT_getblk(sb, sec); + if (!fat_sector) + return -1; + + fat_entry = &(fat_sector[off]); + + SET32_A(fat_entry, content); + } + + FAT_modify(sb, sec); + return 0; +} + +UINT8 *FAT_getblk(struct super_block *sb, UINT32 sec) +{ + BUF_CACHE_T *bp; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + bp = FAT_cache_find(sb, sec); + if (bp != NULL) { + move_to_mru(bp, &p_fs->FAT_cache_lru_list); + return(bp->buf_bh->b_data); + } + + bp = FAT_cache_get(sb, sec); + + FAT_cache_remove_hash(bp); + + bp->drv = p_fs->drv; + bp->sec = sec; + bp->flag = 0; + + FAT_cache_insert_hash(sb, bp); + + if (sector_read(sb, sec, &(bp->buf_bh), 1) != FFS_SUCCESS) { + FAT_cache_remove_hash(bp); + bp->drv = -1; + bp->sec = ~0; + bp->flag = 0; + bp->buf_bh = NULL; + + move_to_lru(bp, &p_fs->FAT_cache_lru_list); + return NULL; + } + + return(bp->buf_bh->b_data); +} + +void FAT_modify(struct super_block *sb, UINT32 sec) +{ + BUF_CACHE_T *bp; + + bp = FAT_cache_find(sb, sec); + if (bp != NULL) { + sector_write(sb, sec, bp->buf_bh, 0); + } +} + +void FAT_release_all(struct super_block *sb) +{ + BUF_CACHE_T *bp; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + sm_P(&f_sem); + + bp = p_fs->FAT_cache_lru_list.next; + while (bp != &p_fs->FAT_cache_lru_list) { + if (bp->drv == p_fs->drv) { + bp->drv = -1; + bp->sec = ~0; + bp->flag = 0; + + if(bp->buf_bh) { + __brelse(bp->buf_bh); + bp->buf_bh = NULL; + } + } + bp = bp->next; + } + + sm_V(&f_sem); +} + +void FAT_sync(struct super_block *sb) +{ + BUF_CACHE_T *bp; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + sm_P(&f_sem); + + bp = p_fs->FAT_cache_lru_list.next; + while (bp != &p_fs->FAT_cache_lru_list) { + if ((bp->drv == p_fs->drv) && (bp->flag & DIRTYBIT)) { + sync_dirty_buffer(bp->buf_bh); + bp->flag &= ~(DIRTYBIT); + } + bp = bp->next; + } + + sm_V(&f_sem); +} + +static BUF_CACHE_T *FAT_cache_find(struct super_block *sb, UINT32 sec) +{ + INT32 off; + BUF_CACHE_T *bp, *hp; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + off = (sec + (sec >> p_fs->sectors_per_clu_bits)) & (FAT_CACHE_HASH_SIZE - 1); + + hp = &(p_fs->FAT_cache_hash_list[off]); + for (bp = hp->hash_next; bp != hp; bp = bp->hash_next) { + if ((bp->drv == p_fs->drv) && (bp->sec == sec)) { + + WARN(!bp->buf_bh, "[EXFAT] FAT_cache has no bh. " + "It will make system panic.\n"); + + touch_buffer(bp->buf_bh); + return(bp); + } + } + return(NULL); +} + +static BUF_CACHE_T *FAT_cache_get(struct super_block *sb, UINT32 sec) +{ + BUF_CACHE_T *bp; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + bp = p_fs->FAT_cache_lru_list.prev; + + + move_to_mru(bp, &p_fs->FAT_cache_lru_list); + return(bp); +} + +static void FAT_cache_insert_hash(struct super_block *sb, BUF_CACHE_T *bp) +{ + INT32 off; + BUF_CACHE_T *hp; + FS_INFO_T *p_fs; + + p_fs = &(EXFAT_SB(sb)->fs_info); + off = (bp->sec + (bp->sec >> p_fs->sectors_per_clu_bits)) & (FAT_CACHE_HASH_SIZE-1); + + hp = &(p_fs->FAT_cache_hash_list[off]); + bp->hash_next = hp->hash_next; + bp->hash_prev = hp; + hp->hash_next->hash_prev = bp; + hp->hash_next = bp; +} + +static void FAT_cache_remove_hash(BUF_CACHE_T *bp) +{ + (bp->hash_prev)->hash_next = bp->hash_next; + (bp->hash_next)->hash_prev = bp->hash_prev; +} + +UINT8 *buf_getblk(struct super_block *sb, UINT32 sec) +{ + UINT8 *buf; + + sm_P(&b_sem); + + buf = __buf_getblk(sb, sec); + + sm_V(&b_sem); + + return(buf); +} + +static UINT8 *__buf_getblk(struct super_block *sb, UINT32 sec) +{ + BUF_CACHE_T *bp; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + bp = buf_cache_find(sb, sec); + if (bp != NULL) { + move_to_mru(bp, &p_fs->buf_cache_lru_list); + return(bp->buf_bh->b_data); + } + + bp = buf_cache_get(sb, sec); + + buf_cache_remove_hash(bp); + + bp->drv = p_fs->drv; + bp->sec = sec; + bp->flag = 0; + + buf_cache_insert_hash(sb, bp); + + if (sector_read(sb, sec, &(bp->buf_bh), 1) != FFS_SUCCESS) { + buf_cache_remove_hash(bp); + bp->drv = -1; + bp->sec = ~0; + bp->flag = 0; + bp->buf_bh = NULL; + + move_to_lru(bp, &p_fs->buf_cache_lru_list); + return NULL; + } + + return(bp->buf_bh->b_data); + +} + +void buf_modify(struct super_block *sb, UINT32 sec) +{ + BUF_CACHE_T *bp; + + sm_P(&b_sem); + + bp = buf_cache_find(sb, sec); + if (likely(bp != NULL)) { + sector_write(sb, sec, bp->buf_bh, 0); + } + + WARN(!bp, "[EXFAT] failed to find buffer_cache(sector:%u).\n", sec); + + sm_V(&b_sem); +} + +void buf_lock(struct super_block *sb, UINT32 sec) +{ + BUF_CACHE_T *bp; + + sm_P(&b_sem); + + bp = buf_cache_find(sb, sec); + if (likely(bp != NULL)) bp->flag |= LOCKBIT; + + WARN(!bp, "[EXFAT] failed to find buffer_cache(sector:%u).\n", sec); + + sm_V(&b_sem); +} + +void buf_unlock(struct super_block *sb, UINT32 sec) +{ + BUF_CACHE_T *bp; + + sm_P(&b_sem); + + bp = buf_cache_find(sb, sec); + if (likely(bp != NULL)) bp->flag &= ~(LOCKBIT); + + WARN(!bp, "[EXFAT] failed to find buffer_cache(sector:%u).\n", sec); + + sm_V(&b_sem); +} + +void buf_release(struct super_block *sb, UINT32 sec) +{ + BUF_CACHE_T *bp; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + sm_P(&b_sem); + + bp = buf_cache_find(sb, sec); + if (likely(bp != NULL)) { + bp->drv = -1; + bp->sec = ~0; + bp->flag = 0; + + if(bp->buf_bh) { + __brelse(bp->buf_bh); + bp->buf_bh = NULL; + } + + move_to_lru(bp, &p_fs->buf_cache_lru_list); + } + + sm_V(&b_sem); +} + +void buf_release_all(struct super_block *sb) +{ + BUF_CACHE_T *bp; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + sm_P(&b_sem); + + bp = p_fs->buf_cache_lru_list.next; + while (bp != &p_fs->buf_cache_lru_list) { + if (bp->drv == p_fs->drv) { + bp->drv = -1; + bp->sec = ~0; + bp->flag = 0; + + if(bp->buf_bh) { + __brelse(bp->buf_bh); + bp->buf_bh = NULL; + } + } + bp = bp->next; + } + + sm_V(&b_sem); +} + +void buf_sync(struct super_block *sb) +{ + BUF_CACHE_T *bp; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + sm_P(&b_sem); + + bp = p_fs->buf_cache_lru_list.next; + while (bp != &p_fs->buf_cache_lru_list) { + if ((bp->drv == p_fs->drv) && (bp->flag & DIRTYBIT)) { + sync_dirty_buffer(bp->buf_bh); + bp->flag &= ~(DIRTYBIT); + } + bp = bp->next; + } + + sm_V(&b_sem); +} + +static BUF_CACHE_T *buf_cache_find(struct super_block *sb, UINT32 sec) +{ + INT32 off; + BUF_CACHE_T *bp, *hp; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + off = (sec + (sec >> p_fs->sectors_per_clu_bits)) & (BUF_CACHE_HASH_SIZE - 1); + + hp = &(p_fs->buf_cache_hash_list[off]); + for (bp = hp->hash_next; bp != hp; bp = bp->hash_next) { + if ((bp->drv == p_fs->drv) && (bp->sec == sec)) { + touch_buffer(bp->buf_bh); + return(bp); + } + } + return(NULL); +} + +static BUF_CACHE_T *buf_cache_get(struct super_block *sb, UINT32 sec) +{ + BUF_CACHE_T *bp; + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + bp = p_fs->buf_cache_lru_list.prev; + while (bp->flag & LOCKBIT) bp = bp->prev; + + + move_to_mru(bp, &p_fs->buf_cache_lru_list); + return(bp); +} + +static void buf_cache_insert_hash(struct super_block *sb, BUF_CACHE_T *bp) +{ + INT32 off; + BUF_CACHE_T *hp; + FS_INFO_T *p_fs; + + p_fs = &(EXFAT_SB(sb)->fs_info); + off = (bp->sec + (bp->sec >> p_fs->sectors_per_clu_bits)) & (BUF_CACHE_HASH_SIZE-1); + + hp = &(p_fs->buf_cache_hash_list[off]); + bp->hash_next = hp->hash_next; + bp->hash_prev = hp; + hp->hash_next->hash_prev = bp; + hp->hash_next = bp; +} + +static void buf_cache_remove_hash(BUF_CACHE_T *bp) +{ + (bp->hash_prev)->hash_next = bp->hash_next; + (bp->hash_next)->hash_prev = bp->hash_prev; +} + +static void push_to_mru(BUF_CACHE_T *bp, BUF_CACHE_T *list) +{ + bp->next = list->next; + bp->prev = list; + list->next->prev = bp; + list->next = bp; +} + +static void push_to_lru(BUF_CACHE_T *bp, BUF_CACHE_T *list) +{ + bp->prev = list->prev; + bp->next = list; + list->prev->next = bp; + list->prev = bp; +} + +static void move_to_mru(BUF_CACHE_T *bp, BUF_CACHE_T *list) +{ + bp->prev->next = bp->next; + bp->next->prev = bp->prev; + push_to_mru(bp, list); +} + +static void move_to_lru(BUF_CACHE_T *bp, BUF_CACHE_T *list) +{ + bp->prev->next = bp->next; + bp->next->prev = bp->prev; + push_to_lru(bp, list); +} diff --git a/drivers/staging/exfat/exfat_cache.h b/drivers/staging/exfat/exfat_cache.h new file mode 100644 index 0000000..4905b23 --- /dev/null +++ b/drivers/staging/exfat/exfat_cache.h @@ -0,0 +1,62 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef _EXFAT_CACHE_H +#define _EXFAT_CACHE_H + +#include "exfat_global.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define LOCKBIT 0x01 +#define DIRTYBIT 0x02 + + typedef struct __BUF_CACHE_T { + struct __BUF_CACHE_T *next; + struct __BUF_CACHE_T *prev; + struct __BUF_CACHE_T *hash_next; + struct __BUF_CACHE_T *hash_prev; + INT32 drv; + UINT32 sec; + UINT32 flag; + struct buffer_head *buf_bh; + } BUF_CACHE_T; + + INT32 buf_init(struct super_block *sb); + INT32 buf_shutdown(struct super_block *sb); + INT32 FAT_read(struct super_block *sb, UINT32 loc, UINT32 *content); + INT32 FAT_write(struct super_block *sb, UINT32 loc, UINT32 content); + UINT8 *FAT_getblk(struct super_block *sb, UINT32 sec); + void FAT_modify(struct super_block *sb, UINT32 sec); + void FAT_release_all(struct super_block *sb); + void FAT_sync(struct super_block *sb); + UINT8 *buf_getblk(struct super_block *sb, UINT32 sec); + void buf_modify(struct super_block *sb, UINT32 sec); + void buf_lock(struct super_block *sb, UINT32 sec); + void buf_unlock(struct super_block *sb, UINT32 sec); + void buf_release(struct super_block *sb, UINT32 sec); + void buf_release_all(struct super_block *sb); + void buf_sync(struct super_block *sb); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/drivers/staging/exfat/exfat_data.c b/drivers/staging/exfat/exfat_data.c new file mode 100644 index 0000000..8c5dd88 --- /dev/null +++ b/drivers/staging/exfat/exfat_data.c @@ -0,0 +1,39 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include "exfat_global.h" +#include "exfat_data.h" +#include "exfat_oal.h" + +#include "exfat_blkdev.h" +#include "exfat_cache.h" +#include "exfat_nls.h" +#include "exfat_super.h" +#include "exfat.h" + +FS_STRUCT_T fs_struct[MAX_DRIVE]; + +DEFINE_SEMAPHORE(f_sem); +BUF_CACHE_T FAT_cache_array[FAT_CACHE_SIZE]; +BUF_CACHE_T FAT_cache_lru_list; +BUF_CACHE_T FAT_cache_hash_list[FAT_CACHE_HASH_SIZE]; + +DEFINE_SEMAPHORE(b_sem); +BUF_CACHE_T buf_cache_array[BUF_CACHE_SIZE]; +BUF_CACHE_T buf_cache_lru_list; +BUF_CACHE_T buf_cache_hash_list[BUF_CACHE_HASH_SIZE]; diff --git a/drivers/staging/exfat/exfat_data.h b/drivers/staging/exfat/exfat_data.h new file mode 100644 index 0000000..fc06244 --- /dev/null +++ b/drivers/staging/exfat/exfat_data.h @@ -0,0 +1,48 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef _EXFAT_DATA_H +#define _EXFAT_DATA_H +#include "exfat_global.h" +#ifdef __cplusplus +extern "C" { +#endif +#define MAX_DEVICE 2 + +/* max number of volumes on all block devices */ +#define MAX_DRIVE 2 + +/* max number of open files */ +#define MAX_OPEN 20 + +/* max number of root directory entries in FAT12/16 */ +/* (should be an exponential value of 2) */ +#define MAX_DENTRY 512 + +/* cache size (in number of sectors) */ +/* (should be an exponential value of 2) */ +#define FAT_CACHE_SIZE 128 +#define FAT_CACHE_HASH_SIZE 64 +#define BUF_CACHE_SIZE 256 +#define BUF_CACHE_HASH_SIZE 64 +#define DEFAULT_CODEPAGE 437 +#define DEFAULT_IOCHARSET "utf8" +#ifdef __cplusplus +} +#endif +#endif diff --git a/drivers/staging/exfat/exfat_global.c b/drivers/staging/exfat/exfat_global.c new file mode 100644 index 0000000..d6cf38a --- /dev/null +++ b/drivers/staging/exfat/exfat_global.c @@ -0,0 +1,118 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include "exfat_global.h" + +INT32 __wstrchr(UINT16 *str, UINT16 wchar) +{ + while (*str) { + if (*(str++) == wchar) return(1); + } + return(0); +} + +INT32 __wstrlen(UINT16 *str) +{ + INT32 length = 0; + + while (*(str++)) length++; + return(length); +} + +#define BITMAP_LOC(v) ((v) >> 3) +#define BITMAP_SHIFT(v) ((v) & 0x07) + +void Bitmap_set_all(UINT8 *bitmap, INT32 mapsize) +{ + MEMSET(bitmap, 0xFF, mapsize); +} + +void Bitmap_clear_all(UINT8 *bitmap, INT32 mapsize) +{ + MEMSET(bitmap, 0x0, mapsize); +} + +INT32 Bitmap_test(UINT8 *bitmap, INT32 i) +{ + UINT8 data; + + data = bitmap[BITMAP_LOC(i)]; + if ((data >> BITMAP_SHIFT(i)) & 0x01) return(1); + return(0); +} + +void Bitmap_set(UINT8 *bitmap, INT32 i) +{ + bitmap[BITMAP_LOC(i)] |= (0x01 << BITMAP_SHIFT(i)); +} + +void Bitmap_clear(UINT8 *bitmap, INT32 i) +{ + bitmap[BITMAP_LOC(i)] &= ~(0x01 << BITMAP_SHIFT(i)); +} + +void Bitmap_nbits_set(UINT8 *bitmap, INT32 offset, INT32 nbits) +{ + INT32 i; + + for (i = 0; i < nbits; i++) { + Bitmap_set(bitmap, offset+i); + } +} + +void Bitmap_nbits_clear(UINT8 *bitmap, INT32 offset, INT32 nbits) +{ + INT32 i; + + for (i = 0; i < nbits; i++) { + Bitmap_clear(bitmap, offset+i); + } +} + +void my_itoa(INT8 *buf, INT32 v) +{ + INT32 mod[10]; + INT32 i; + + for (i = 0; i < 10; i++) { + mod[i] = (v % 10); + v = v / 10; + if (v == 0) break; + } + + if (i == 10) + i--; + + for (; i >= 0; i--) { + *buf = (UINT8) ('0' + mod[i]); + buf++; + } + *buf = '\0'; +} + +INT32 my_log2(UINT32 v) +{ + UINT32 bits = 0; + + while (v > 1) { + if (v & 0x01) return(-1); + v >>= 1; + bits++; + } + return(bits); +} diff --git a/drivers/staging/exfat/exfat_global.h b/drivers/staging/exfat/exfat_global.h new file mode 100644 index 0000000..f9222a6 --- /dev/null +++ b/drivers/staging/exfat/exfat_global.h @@ -0,0 +1,126 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef _EXFAT_GLOBAL_H +#define _EXFAT_GLOBAL_H + +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/fs.h> + + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef TRUE +#define TRUE 1 +#endif +#ifndef FALSE +#define FALSE 0 +#endif +#ifndef OK +#define OK 0 +#endif +#ifndef FAIL +#define FAIL 1 +#endif +#ifndef NULL +#define NULL 0 +#endif + +#define MIN(a, b) (((a) < (b)) ? (a) : (b)) +#define MAX(a, b) (((a) > (b)) ? (a) : (b)) + + typedef char INT8; + typedef short INT16; + typedef int INT32; + typedef long long INT64; + typedef unsigned char UINT8; + typedef unsigned short UINT16; + typedef unsigned int UINT32; + typedef unsigned long long UINT64; + typedef unsigned char BOOL; + +#ifdef MALLOC +#undef MALLOC +#endif +#ifdef FREE +#undef FREE +#endif +#ifdef MEMSET +#undef MEMSET +#endif +#ifdef MEMCPY +#undef MEMCPY +#endif +#ifdef MEMCMP +#undef MEMCMP +#endif + +#define MALLOC(size) kmalloc(size, GFP_KERNEL) +#define FREE(mem) if (mem) kfree(mem) +#define MEMSET(mem, value, size) memset(mem, value, size) +#define MEMCPY(dest, src, size) memcpy(dest, src, size) +#define MEMCMP(mem1, mem2, size) memcmp(mem1, mem2, size) +#define COPY_DENTRY(dest, src) memcpy(dest, src, sizeof(DENTRY_T)) + +#define STRCPY(dest, src) strcpy(dest, src) +#define STRNCPY(dest, src, n) strncpy(dest, src, n) +#define STRCAT(str1, str2) strcat(str1, str2) +#define STRCMP(str1, str2) strcmp(str1, str2) +#define STRNCMP(str1, str2, n) strncmp(str1, str2, n) +#define STRLEN(str) strlen(str) + + INT32 __wstrchr(UINT16 *str, UINT16 wchar); + INT32 __wstrlen(UINT16 *str); + +#define WSTRCHR(str, wchar) __wstrchr(str, wchar) +#define WSTRLEN(str) __wstrlen(str) + +#ifdef CONFIG_EXFAT_DEBUG_MSG +#define PRINTK(...) \ + do { \ + printk("[EXFAT] " __VA_ARGS__); \ + } while(0) +#else +#define PRINTK(...) +#endif + + void Bitmap_set_all(UINT8 *bitmap, INT32 mapsize); + void Bitmap_clear_all(UINT8 *bitmap, INT32 mapsize); + INT32 Bitmap_test(UINT8 *bitmap, INT32 i); + void Bitmap_set(UINT8 *bitmap, INT32 i); + void Bitmap_clear(UINT8 *bitmpa, INT32 i); + void Bitmap_nbits_set(UINT8 *bitmap, INT32 offset, INT32 nbits); + void Bitmap_nbits_clear(UINT8 *bitmap, INT32 offset, INT32 nbits); + + void my_itoa(INT8 *buf, INT32 v); + INT32 my_log2(UINT32 v); + +#ifdef PRINT +#undef PRINT +#endif + +#define PRINT printk +#ifdef __cplusplus +} +#endif +#endif diff --git a/drivers/staging/exfat/exfat_nls.c b/drivers/staging/exfat/exfat_nls.c new file mode 100644 index 0000000..841777f --- /dev/null +++ b/drivers/staging/exfat/exfat_nls.c @@ -0,0 +1,353 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include "exfat_global.h" +#include "exfat_data.h" + +#include "exfat_nls.h" +#include "exfat_api.h" +#include "exfat_super.h" +#include "exfat.h" + +#include <linux/nls.h> + +static UINT16 bad_dos_chars[] = { + /* + , ; = [ ] */ + 0x002B, 0x002C, 0x003B, 0x003D, 0x005B, 0x005D, + 0xFF0B, 0xFF0C, 0xFF1B, 0xFF1D, 0xFF3B, 0xFF3D, + 0 +}; + +static UINT16 bad_uni_chars[] = { + /* " * / : < > ? \ | */ + 0x0022, 0x002A, 0x002F, 0x003A, + 0x003C, 0x003E, 0x003F, 0x005C, 0x007C, + 0 +}; + +static INT32 convert_uni_to_ch(struct nls_table *nls, UINT8 *ch, UINT16 uni, INT32 *lossy); +static INT32 convert_ch_to_uni(struct nls_table *nls, UINT16 *uni, UINT8 *ch, INT32 *lossy); + +UINT16 nls_upper(struct super_block *sb, UINT16 a) +{ + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + + if (EXFAT_SB(sb)->options.casesensitive) + return(a); + if ((p_fs->vol_utbl)[get_col_index(a)] != NULL) + return (p_fs->vol_utbl)[get_col_index(a)][get_row_index(a)]; + else + return a; +} + +INT32 nls_dosname_cmp(struct super_block *sb, UINT8 *a, UINT8 *b) +{ + return(STRNCMP((void *) a, (void *) b, DOS_NAME_LENGTH)); +} + +INT32 nls_uniname_cmp(struct super_block *sb, UINT16 *a, UINT16 *b) +{ + INT32 i; + + for (i = 0; i < MAX_NAME_LENGTH; i++, a++, b++) { + if (nls_upper(sb, *a) != nls_upper(sb, *b)) return(1); + if (*a == 0x0) return(0); + } + return(0); +} + +void nls_uniname_to_dosname(struct super_block *sb, DOS_NAME_T *p_dosname, UNI_NAME_T *p_uniname, INT32 *p_lossy) +{ + INT32 i, j, len, lossy = FALSE; + UINT8 buf[MAX_CHARSET_SIZE]; + UINT8 lower = 0, upper = 0; + UINT8 *dosname = p_dosname->name; + UINT16 *uniname = p_uniname->name; + UINT16 *p, *last_period; + struct nls_table *nls = EXFAT_SB(sb)->nls_disk; + + for (i = 0; i < DOS_NAME_LENGTH; i++) { + *(dosname+i) = ' '; + } + + if (!nls_uniname_cmp(sb, uniname, (UINT16 *) UNI_CUR_DIR_NAME)) { + *(dosname) = '.'; + p_dosname->name_case = 0x0; + if (p_lossy != NULL) *p_lossy = FALSE; + return; + } + + if (!nls_uniname_cmp(sb, uniname, (UINT16 *) UNI_PAR_DIR_NAME)) { + *(dosname) = '.'; + *(dosname+1) = '.'; + p_dosname->name_case = 0x0; + if (p_lossy != NULL) *p_lossy = FALSE; + return; + } + + /* search for the last embedded period */ + last_period = NULL; + for (p = uniname; *p; p++) { + if (*p == (UINT16) '.') last_period = p; + } + + i = 0; + while (i < DOS_NAME_LENGTH) { + if (i == 8) { + if (last_period == NULL) break; + + if (uniname <= last_period) { + if (uniname < last_period) lossy = TRUE; + uniname = last_period + 1; + } + } + + if (*uniname == (UINT16) '\0') { + break; + } else if (*uniname == (UINT16) ' ') { + lossy = TRUE; + } else if (*uniname == (UINT16) '.') { + if (uniname < last_period) lossy = TRUE; + else i = 8; + } else if (WSTRCHR(bad_dos_chars, *uniname)) { + lossy = TRUE; + *(dosname+i) = '_'; + i++; + } else { + len = convert_uni_to_ch(nls, buf, *uniname, &lossy); + + if (len > 1) { + if ((i >= 8) && ((i+len) > DOS_NAME_LENGTH)) { + break; + } + if ((i < 8) && ((i+len) > 8)) { + i = 8; + continue; + } + + lower = 0xFF; + + for (j = 0; j < len; j++, i++) { + *(dosname+i) = *(buf+j); + } + } else { + if ((*buf >= 'a') && (*buf <= 'z')) { + *(dosname+i) = *buf - ('a' - 'A'); + + if (i < 8) lower |= 0x08; + else lower |= 0x10; + } else if ((*buf >= 'A') && (*buf <= 'Z')) { + *(dosname+i) = *buf; + + if (i < 8) upper |= 0x08; + else upper |= 0x10; + } else { + *(dosname+i) = *buf; + } + i++; + } + } + + uniname++; + } + + if (*dosname == 0xE5) *dosname = 0x05; + if (*uniname != 0x0) lossy = TRUE; + + if (upper & lower) p_dosname->name_case = 0xFF; + else p_dosname->name_case = lower; + + if (p_lossy != NULL) *p_lossy = lossy; +} + +void nls_dosname_to_uniname(struct super_block *sb, UNI_NAME_T *p_uniname, DOS_NAME_T *p_dosname) +{ + INT32 i = 0, j, n = 0; + UINT8 buf[DOS_NAME_LENGTH+2]; + UINT8 *dosname = p_dosname->name; + UINT16 *uniname = p_uniname->name; + struct nls_table *nls = EXFAT_SB(sb)->nls_disk; + + if (*dosname == 0x05) { + *buf = 0xE5; + i++; + n++; + } + + for ( ; i < 8; i++, n++) { + if (*(dosname+i) == ' ') break; + + if ((*(dosname+i) >= 'A') && (*(dosname+i) <= 'Z') && (p_dosname->name_case & 0x08)) + *(buf+n) = *(dosname+i) + ('a' - 'A'); + else + *(buf+n) = *(dosname+i); + } + if (*(dosname+8) != ' ') { + *(buf+n) = '.'; + n++; + } + + for (i = 8; i < DOS_NAME_LENGTH; i++, n++) { + if (*(dosname+i) == ' ') break; + + if ((*(dosname+i) >= 'A') && (*(dosname+i) <= 'Z') && (p_dosname->name_case & 0x10)) + *(buf+n) = *(dosname+i) + ('a' - 'A'); + else + *(buf+n) = *(dosname+i); + } + *(buf+n) = '\0'; + + i = j = 0; + while (j < (MAX_NAME_LENGTH-1)) { + if (*(buf+i) == '\0') break; + + i += convert_ch_to_uni(nls, uniname, (buf+i), NULL); + + uniname++; + j++; + } + + *uniname = (UINT16) '\0'; +} + +void nls_uniname_to_cstring(struct super_block *sb, UINT8 *p_cstring, UNI_NAME_T *p_uniname) +{ + INT32 i, j, len; + UINT8 buf[MAX_CHARSET_SIZE]; + UINT16 *uniname = p_uniname->name; + struct nls_table *nls = EXFAT_SB(sb)->nls_io; + + i = 0; + while (i < (MAX_NAME_LENGTH-1)) { + if (*uniname == (UINT16) '\0') break; + + len = convert_uni_to_ch(nls, buf, *uniname, NULL); + + if (len > 1) { + for (j = 0; j < len; j++) + *p_cstring++ = (INT8) *(buf+j); + } else { + *p_cstring++ = (INT8) *buf; + } + + uniname++; + i++; + } + + *p_cstring = '\0'; +} + +void nls_cstring_to_uniname(struct super_block *sb, UNI_NAME_T *p_uniname, UINT8 *p_cstring, INT32 *p_lossy) +{ + INT32 i, j, lossy = FALSE; + UINT8 *end_of_name; + UINT16 upname[MAX_NAME_LENGTH]; + UINT16 *uniname = p_uniname->name; + struct nls_table *nls = EXFAT_SB(sb)->nls_io; + + + /* strip all trailing spaces */ + end_of_name = p_cstring + STRLEN((INT8 *) p_cstring); + + while (*(--end_of_name) == ' ') { + if (end_of_name < p_cstring) break; + } + *(++end_of_name) = '\0'; + + if (STRCMP((INT8 *) p_cstring, ".") && STRCMP((INT8 *) p_cstring, "..")) { + + /* strip all trailing periods */ + while (*(--end_of_name) == '.') { + if (end_of_name < p_cstring) break; + } + *(++end_of_name) = '\0'; + } + + if (*p_cstring == '\0') + lossy = TRUE; + + i = j = 0; + while (j < (MAX_NAME_LENGTH-1)) { + if (*(p_cstring+i) == '\0') break; + + i += convert_ch_to_uni(nls, uniname, (UINT8 *)(p_cstring+i), &lossy); + + if ((*uniname < 0x0020) || WSTRCHR(bad_uni_chars, *uniname)) + lossy = TRUE; + + *(upname+j) = nls_upper(sb, *uniname); + + uniname++; + j++; + } + + if (*(p_cstring+i) != '\0') + lossy = TRUE; + *uniname = (UINT16) '\0'; + + p_uniname->name_len = j; + p_uniname->name_hash = calc_checksum_2byte((void *) upname, j<<1, 0, CS_DEFAULT); + + if (p_lossy != NULL) + *p_lossy = lossy; +} + +static INT32 convert_ch_to_uni(struct nls_table *nls, UINT16 *uni, UINT8 *ch, INT32 *lossy) +{ + int len; + + *uni = 0x0; + + if (ch[0] < 0x80) { + *uni = (UINT16) ch[0]; + return(1); + } + + if ((len = nls->char2uni(ch, NLS_MAX_CHARSET_SIZE, uni)) < 0) { + printk("%s: fail to use nls \n", __func__); + if (lossy != NULL) + *lossy = TRUE; + *uni = (UINT16) '_'; + if (!strcmp(nls->charset, "utf8")) return(1); + else return(2); + } + + return(len); +} + +static INT32 convert_uni_to_ch(struct nls_table *nls, UINT8 *ch, UINT16 uni, INT32 *lossy) +{ + int len; + + ch[0] = 0x0; + + if (uni < 0x0080) { + ch[0] = (UINT8) uni; + return(1); + } + + if ((len = nls->uni2char(uni, ch, NLS_MAX_CHARSET_SIZE)) < 0) { + printk("%s: fail to use nls \n", __func__); + if (lossy != NULL) *lossy = TRUE; + ch[0] = '_'; + return(1); + } + + return(len); + +} diff --git a/drivers/staging/exfat/exfat_nls.h b/drivers/staging/exfat/exfat_nls.h new file mode 100644 index 0000000..761fd71 --- /dev/null +++ b/drivers/staging/exfat/exfat_nls.h @@ -0,0 +1,69 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef _EXFAT_NLS_H +#define _EXFAT_NLS_H + +#include <linux/nls.h> + +#include "exfat_global.h" +#include "exfat_api.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define NUM_UPCASE 2918 + +#define DOS_CUR_DIR_NAME ". " +#define DOS_PAR_DIR_NAME ".. " + +#ifdef CONFIG_EXFAT_LITTLE_ENDIAN +#define UNI_CUR_DIR_NAME ".\0" +#define UNI_PAR_DIR_NAME ".\0.\0" +#else +#define UNI_CUR_DIR_NAME "\0." +#define UNI_PAR_DIR_NAME "\0.\0." +#endif + + +/* DOS name stucture */ +typedef struct { + UINT8 name[DOS_NAME_LENGTH]; + UINT8 name_case; +} DOS_NAME_T; + +/* unicode name stucture */ +typedef struct { + UINT16 name[MAX_NAME_LENGTH]; + UINT16 name_hash; + UINT8 name_len; +} UNI_NAME_T; + +UINT16 nls_upper(struct super_block *sb, UINT16 a); +INT32 nls_dosname_cmp(struct super_block *sb, UINT8 *a, UINT8 *b); +INT32 nls_uniname_cmp(struct super_block *sb, UINT16 *a, UINT16 *b); +void nls_uniname_to_dosname(struct super_block *sb, DOS_NAME_T *p_dosname, UNI_NAME_T *p_uniname, INT32 *p_lossy); +void nls_dosname_to_uniname(struct super_block *sb, UNI_NAME_T *p_uniname, DOS_NAME_T *p_dosname); +void nls_uniname_to_cstring(struct super_block *sb, UINT8 *p_cstring, UNI_NAME_T *p_uniname); +void nls_cstring_to_uniname(struct super_block *sb, UNI_NAME_T *p_uniname, UINT8 *p_cstring, INT32 *p_lossy); + +#ifdef __cplusplus +} +#endif +#endif diff --git a/drivers/staging/exfat/exfat_oal.c b/drivers/staging/exfat/exfat_oal.c new file mode 100644 index 0000000..cf73250 --- /dev/null +++ b/drivers/staging/exfat/exfat_oal.c @@ -0,0 +1,156 @@ +/* Some of the source code in this file came from "linux/fs/fat/misc.c". */ +/* + * linux/fs/fat/misc.c + * + * Written 1992,1993 by Werner Almesberger + * 22/11/2000 - Fixed fat_date_unix2dos for dates earlier than 01/01/1980 + * and date_dos2unix for date==0 by Igor Zhbanov(bsg@xxxxxxxxxxxx) + */ + +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include <linux/semaphore.h> +#include <linux/time.h> + +#include "exfat_global.h" +#include "exfat_api.h" +#include "exfat_oal.h" + +DEFINE_SEMAPHORE(z_sem); + +INT32 sm_init(struct semaphore *sm) +{ + sema_init(sm, 1); + return(0); +} + +INT32 sm_P(struct semaphore *sm) +{ + down(sm); + return 0; +} + +void sm_V(struct semaphore *sm) +{ + up(sm); +} + +extern struct timezone sys_tz; + +/* + * The epoch of FAT timestamp is 1980. + * : bits : value + * date: 0 - 4: day (1 - 31) + * date: 5 - 8: month (1 - 12) + * date: 9 - 15: year (0 - 127) from 1980 + * time: 0 - 4: sec (0 - 29) 2sec counts + * time: 5 - 10: min (0 - 59) + * time: 11 - 15: hour (0 - 23) + */ +#define UNIX_SECS_1980 315532800L + +#if BITS_PER_LONG == 64 +#define UNIX_SECS_2108 4354819200L +#endif +/* days between 1.1.70 and 1.1.80 (2 leap days) */ +#define DAYS_DELTA_DECADE (365 * 10 + 2) +/* 120 (2100 - 1980) isn't leap year */ +#define NO_LEAP_YEAR_2100 (120) +#define IS_LEAP_YEAR(y) (!((y) & 3) && (y) != NO_LEAP_YEAR_2100) + +#define SECS_PER_MIN (60) +#define SECS_PER_HOUR (60 * SECS_PER_MIN) +#define SECS_PER_DAY (24 * SECS_PER_HOUR) + +#define MAKE_LEAP_YEAR(leap_year, year) \ + do { \ + if (unlikely(year > NO_LEAP_YEAR_2100)) \ + leap_year = ((year + 3) / 4) - 1; \ + else \ + leap_year = ((year + 3) / 4); \ + } while(0) + +/* Linear day numbers of the respective 1sts in non-leap years. */ +static time_t accum_days_in_year[] = { + /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */ + 0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, +}; + +TIMESTAMP_T *tm_current(TIMESTAMP_T *tp) +{ + struct timespec ts = CURRENT_TIME_SEC; + time_t second = ts.tv_sec; + time_t day, leap_day, month, year; + + second -= sys_tz.tz_minuteswest * SECS_PER_MIN; + + /* Jan 1 GMT 00:00:00 1980. But what about another time zone? */ + if (second < UNIX_SECS_1980) { + tp->sec = 0; + tp->min = 0; + tp->hour = 0; + tp->day = 1; + tp->mon = 1; + tp->year = 0; + return(tp); + } +#if BITS_PER_LONG == 64 + if (second >= UNIX_SECS_2108) { + tp->sec = 59; + tp->min = 59; + tp->hour = 23; + tp->day = 31; + tp->mon = 12; + tp->year = 127; + return(tp); + } +#endif + + day = second / SECS_PER_DAY - DAYS_DELTA_DECADE; + year = day / 365; + + MAKE_LEAP_YEAR(leap_day, year); + if (year * 365 + leap_day > day) + year--; + + MAKE_LEAP_YEAR(leap_day, year); + + day -= year * 365 + leap_day; + + if (IS_LEAP_YEAR(year) && day == accum_days_in_year[3]) { + month = 2; + } else { + if (IS_LEAP_YEAR(year) && day > accum_days_in_year[3]) + day--; + for (month = 1; month < 12; month++) { + if (accum_days_in_year[month + 1] > day) + break; + } + } + day -= accum_days_in_year[month]; + + tp->sec = second % SECS_PER_MIN; + tp->min = (second / SECS_PER_MIN) % 60; + tp->hour = (second / SECS_PER_HOUR) % 24; + tp->day = day + 1; + tp->mon = month; + tp->year = year; + + return(tp); +} diff --git a/drivers/staging/exfat/exfat_oal.h b/drivers/staging/exfat/exfat_oal.h new file mode 100644 index 0000000..ae67a95 --- /dev/null +++ b/drivers/staging/exfat/exfat_oal.h @@ -0,0 +1,48 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef _EXFAT_OAL_H +#define _EXFAT_OAL_H + +#include "exfat_global.h" +#include <linux/version.h> + +#ifdef __cplusplus +extern "C" { +#endif + + typedef struct { + UINT16 sec; /* 0 ~ 59 */ + UINT16 min; /* 0 ~ 59 */ + UINT16 hour; /* 0 ~ 23 */ + UINT16 day; /* 1 ~ 31 */ + UINT16 mon; /* 1 ~ 12 */ + UINT16 year; /* 0 ~ 127 (since 1980) */ + } TIMESTAMP_T; + + INT32 sm_init(struct semaphore *sm); + INT32 sm_P(struct semaphore *sm); + void sm_V(struct semaphore *sm); + + TIMESTAMP_T *tm_current(TIMESTAMP_T *tm); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/drivers/staging/exfat/exfat_part.h b/drivers/staging/exfat/exfat_part.h new file mode 100644 index 0000000..9ef2195 --- /dev/null +++ b/drivers/staging/exfat/exfat_part.h @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef _EXFAT_PART_H +#define _EXFAT_PART_H + +#include "exfat_global.h" +#include "exfat_api.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define MBR_SIGNATURE 0xAA55 + + /* MS-DOS FAT master boot record (512 bytes) */ + typedef struct { + UINT8 boot_code[446]; + UINT8 partition[64]; + UINT8 signature[2]; + } MBR_SECTOR_T; + + /* MS-DOS FAT partition table (64 bytes) */ + typedef struct { + UINT8 def_boot; + UINT8 bgn_chs[3]; + UINT8 sys_type; + UINT8 end_chs[3]; + UINT8 start_sector[4]; + UINT8 num_sectors[4]; + } PART_ENTRY_T; + + INT32 ffsSetPartition(INT32 dev, INT32 num_vol, PART_INFO_T *vol_spec); + INT32 ffsGetPartition(INT32 dev, INT32 *num_vol, PART_INFO_T *vol_spec); + INT32 ffsGetDevInfo(INT32 dev, DEV_INFO_T *info); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/drivers/staging/exfat/exfat_super.c b/drivers/staging/exfat/exfat_super.c new file mode 100644 index 0000000..3fc60b9 --- /dev/null +++ b/drivers/staging/exfat/exfat_super.c @@ -0,0 +1,2009 @@ +/* Some of the source code in this file came from "linux/fs/fat/file.c","linux/fs/fat/inode.c" and "linux/fs/fat/misc.c". */ +/* + * linux/fs/fat/file.c + * + * Written 1992,1993 by Werner Almesberger + * + * regular file handling primitives for fat-based filesystems + */ + +/* + * linux/fs/fat/inode.c + * + * Written 1992,1993 by Werner Almesberger + * VFAT extensions by Gordon Chaffee, merged with msdos fs by Henrik Storner + * Rewritten for the constant inumbers support by Al Viro + * + * Fixes: + * + * Max Cohan: Fixed invalid FSINFO offset when info_sector is 0 + */ + +/* + * linux/fs/fat/misc.c + * + * Written 1992,1993 by Werner Almesberger + * 22/11/2000 - Fixed fat_date_unix2dos for dates earlier than 01/01/1980 + * and date_dos2unix for date==0 by Igor Zhbanov(bsg@xxxxxxxxxxxx) + */ + +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/time.h> +#include <linux/slab.h> +#include <linux/seq_file.h> +#include <linux/pagemap.h> +#include <linux/mpage.h> +#include <linux/buffer_head.h> +#include <linux/exportfs.h> +#include <linux/mount.h> +#include <linux/vfs.h> +#include <linux/aio.h> +#include <linux/parser.h> +#include <linux/uio.h> +#include <linux/writeback.h> +#include <linux/log2.h> +#include <linux/hash.h> +#include <linux/backing-dev.h> +#include <linux/sched.h> +#include <linux/fs_struct.h> +#include <linux/namei.h> +#include <asm/current.h> +#include <asm/unaligned.h> + +#include "exfat_version.h" +#include "exfat_global.h" +#include "exfat_data.h" +#include "exfat_oal.h" + +#include "exfat_blkdev.h" +#include "exfat_cache.h" +#include "exfat_part.h" +#include "exfat_nls.h" +#include "exfat_api.h" +#include "exfat.h" + +#include "exfat_super.h" + +static struct kmem_cache *exfat_inode_cachep; + +static int exfat_default_codepage = DEFAULT_CODEPAGE; +static char exfat_default_iocharset[] = DEFAULT_IOCHARSET; + +extern struct timezone sys_tz; + +#define CHECK_ERR(x) BUG_ON(x) +#define ELAPSED_TIME 0 + +#if (ELAPSED_TIME == 1) +#include <linux/time.h> + +static UINT32 __t1, __t2; +static UINT32 get_current_msec(void) +{ + struct timeval tm; + do_gettimeofday(&tm); + return((UINT32)(tm.tv_sec*1000000 + tm.tv_usec)); +} +#define TIME_START() do {__t1 = get_current_msec();} while (0) +#define TIME_END() do {__t2 = get_current_msec();} while (0) +#define PRINT_TIME(n) do {printk("[EXFAT] Elapsed time %d = %d (usec)\n", n, (__t2 - __t1));} while (0) +#else +#define TIME_START() +#define TIME_END() +#define PRINT_TIME(n) +#endif + +#define UNIX_SECS_1980 315532800L + +#if BITS_PER_LONG == 64 +#define UNIX_SECS_2108 4354819200L +#endif +/* days between 1.1.70 and 1.1.80 (2 leap days) */ +#define DAYS_DELTA_DECADE (365 * 10 + 2) +/* 120 (2100 - 1980) isn't leap year */ +#define NO_LEAP_YEAR_2100 (120) +#define IS_LEAP_YEAR(y) (!((y) & 0x3) && (y) != NO_LEAP_YEAR_2100) + +#define SECS_PER_MIN (60) +#define SECS_PER_HOUR (60 * SECS_PER_MIN) +#define SECS_PER_DAY (24 * SECS_PER_HOUR) + +#define MAKE_LEAP_YEAR(leap_year, year) \ + do { \ + if (unlikely(year > NO_LEAP_YEAR_2100)) \ + leap_year = ((year + 3) / 4) - 1; \ + else \ + leap_year = ((year + 3) / 4); \ + } while(0) + +/* Linear day numbers of the respective 1sts in non-leap years. */ +static time_t accum_days_in_year[] = { + /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */ + 0, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, +}; + +static void _exfat_truncate(struct inode *inode, loff_t old_size); + +/* Convert a FAT time/date pair to a UNIX date (seconds since 1 1 70). */ +void exfat_time_fat2unix(struct exfat_sb_info *sbi, struct timespec *ts, + DATE_TIME_T *tp) +{ + time_t year = tp->Year; + time_t ld; + + MAKE_LEAP_YEAR(ld, year); + + if (IS_LEAP_YEAR(year) && (tp->Month) > 2) + ld++; + + ts->tv_sec = tp->Second + tp->Minute * SECS_PER_MIN + + tp->Hour * SECS_PER_HOUR + + (year * 365 + ld + accum_days_in_year[(tp->Month)] + (tp->Day - 1) + DAYS_DELTA_DECADE) * SECS_PER_DAY + + sys_tz.tz_minuteswest * SECS_PER_MIN; + ts->tv_nsec = 0; +} + +/* Convert linear UNIX date to a FAT time/date pair. */ +void exfat_time_unix2fat(struct exfat_sb_info *sbi, struct timespec *ts, + DATE_TIME_T *tp) +{ + time_t second = ts->tv_sec; + time_t day, month, year; + time_t ld; + + second -= sys_tz.tz_minuteswest * SECS_PER_MIN; + + /* Jan 1 GMT 00:00:00 1980. But what about another time zone? */ + if (second < UNIX_SECS_1980) { + tp->Second = 0; + tp->Minute = 0; + tp->Hour = 0; + tp->Day = 1; + tp->Month = 1; + tp->Year = 0; + return; + } +#if (BITS_PER_LONG == 64) + if (second >= UNIX_SECS_2108) { + tp->Second = 59; + tp->Minute = 59; + tp->Hour = 23; + tp->Day = 31; + tp->Month = 12; + tp->Year = 127; + return; + } +#endif + day = second / SECS_PER_DAY - DAYS_DELTA_DECADE; + year = day / 365; + MAKE_LEAP_YEAR(ld, year); + if (year * 365 + ld > day) + year--; + + MAKE_LEAP_YEAR(ld, year); + day -= year * 365 + ld; + + if (IS_LEAP_YEAR(year) && day == accum_days_in_year[3]) { + month = 2; + } else { + if (IS_LEAP_YEAR(year) && day > accum_days_in_year[3]) + day--; + for (month = 1; month < 12; month++) { + if (accum_days_in_year[month + 1] > day) + break; + } + } + day -= accum_days_in_year[month]; + + tp->Second = second % SECS_PER_MIN; + tp->Minute = (second / SECS_PER_MIN) % 60; + tp->Hour = (second / SECS_PER_HOUR) % 24; + tp->Day = day + 1; + tp->Month = month; + tp->Year = year; +} + +static struct inode *exfat_iget(struct super_block *sb, loff_t i_pos); +static long exfat_generic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); +static int exfat_sync_inode(struct inode *inode); +static struct inode *exfat_build_inode(struct super_block *sb, FILE_ID_T *fid, loff_t i_pos); +static void exfat_detach(struct inode *inode); +static void exfat_attach(struct inode *inode, loff_t i_pos); +static inline unsigned long exfat_hash(loff_t i_pos); +static int exfat_write_inode(struct inode *inode, struct writeback_control *wbc); +static void exfat_write_super(struct super_block *sb); + +static void __lock_super(struct super_block *sb) +{ + struct exfat_sb_info *sbi = EXFAT_SB(sb); + mutex_lock(&sbi->s_lock); +} + +static void __unlock_super(struct super_block *sb) +{ + struct exfat_sb_info *sbi = EXFAT_SB(sb); + mutex_unlock(&sbi->s_lock); +} + +static int __is_sb_dirty(struct super_block *sb) +{ + struct exfat_sb_info *sbi = EXFAT_SB(sb); + return sbi->s_dirt; +} + +static void __set_sb_clean(struct super_block *sb) +{ + struct exfat_sb_info *sbi = EXFAT_SB(sb); + sbi->s_dirt = 0; +} + +static int exfat_readdir(struct file *filp, struct dir_context *ctx) +{ + struct inode *inode = file_inode(filp); + struct super_block *sb = inode->i_sb; + struct exfat_sb_info *sbi = EXFAT_SB(sb); + FS_INFO_T *p_fs = &(sbi->fs_info); + BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info); + DIR_ENTRY_T de; + unsigned long inum; + loff_t cpos; + int err = 0; + + __lock_super(sb); + + cpos = ctx->pos; + /* Fake . and .. for the root directory. */ + if ((p_fs->vol_type == EXFAT) || (inode->i_ino == EXFAT_ROOT_INO)) { + while (cpos < 2) { + if (inode->i_ino == EXFAT_ROOT_INO) + inum = EXFAT_ROOT_INO; + else if (cpos == 0) + inum = inode->i_ino; + else /* (cpos == 1) */ + inum = parent_ino(filp->f_path.dentry); + + if (!dir_emit_dots(filp, ctx)) + goto out; + cpos++; + ctx->pos++; + } + if (cpos == 2) { + cpos = 0; + } + } + if (cpos & (DENTRY_SIZE - 1)) { + err = -ENOENT; + goto out; + } + +get_new: + EXFAT_I(inode)->fid.size = i_size_read(inode); + EXFAT_I(inode)->fid.rwoffset = cpos >> DENTRY_SIZE_BITS; + + err = FsReadDir(inode, &de); + if (err) { + /* at least we tried to read a sector + * move cpos to next sector position (should be aligned) + */ + if (err == FFS_MEDIAERR) { + cpos += 1 << p_bd->sector_size_bits; + cpos &= ~((1 << p_bd->sector_size_bits)-1); + } + + err = -EIO; + goto end_of_dir; + } + + cpos = EXFAT_I(inode)->fid.rwoffset << DENTRY_SIZE_BITS; + + if (!de.Name[0]) + goto end_of_dir; + + if (!memcmp(de.ShortName, DOS_CUR_DIR_NAME, DOS_NAME_LENGTH)) { + inum = inode->i_ino; + } else if (!memcmp(de.ShortName, DOS_PAR_DIR_NAME, DOS_NAME_LENGTH)) { + inum = parent_ino(filp->f_path.dentry); + } else { + loff_t i_pos = ((loff_t) EXFAT_I(inode)->fid.start_clu << 32) | + ((EXFAT_I(inode)->fid.rwoffset-1) & 0xffffffff); + + struct inode *tmp = exfat_iget(sb, i_pos); + if (tmp) { + inum = tmp->i_ino; + iput(tmp); + } else { + inum = iunique(sb, EXFAT_ROOT_INO); + } + } + + if (!dir_emit(ctx, de.Name, strlen(de.Name), inum, + (de.Attr & ATTR_SUBDIR) ? DT_DIR : DT_REG)) + goto out; + + ctx->pos = cpos; + goto get_new; + +end_of_dir: + ctx->pos = cpos; +out: + __unlock_super(sb); + return err; +} + +static int exfat_ioctl_volume_id(struct inode *dir) +{ + struct super_block *sb = dir->i_sb; + struct exfat_sb_info *sbi = EXFAT_SB(sb); + FS_INFO_T *p_fs = &(sbi->fs_info); + + return p_fs->vol_id; +} + +static long exfat_generic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ +#ifdef CONFIG_EXFAT_KERNEL_DEBUG + struct inode *inode = filp->f_dentry->d_inode; + unsigned int flags; +#endif + + switch (cmd) { + case EXFAT_IOCTL_GET_VOLUME_ID: + return exfat_ioctl_volume_id(inode); +#ifdef CONFIG_EXFAT_KERNEL_DEBUG + case EXFAT_IOC_GET_DEBUGFLAGS: { + struct super_block *sb = inode->i_sb; + struct exfat_sb_info *sbi = EXFAT_SB(sb); + + flags = sbi->debug_flags; + return put_user(flags, (int __user *)arg); + } + case EXFAT_IOC_SET_DEBUGFLAGS: { + struct super_block *sb = inode->i_sb; + struct exfat_sb_info *sbi = EXFAT_SB(sb); + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (get_user(flags, (int __user *) arg)) + return -EFAULT; + + __lock_super(sb); + sbi->debug_flags = flags; + __unlock_super(sb); + + return 0; + } +#endif + default: + return -ENOTTY; + } +} + +const struct file_operations exfat_dir_operations = { + .llseek = generic_file_llseek, + .read = generic_read_dir, + .iterate = exfat_readdir, + .unlocked_ioctl = exfat_generic_ioctl, + .fsync = generic_file_fsync, +}; + +static int exfat_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl) +{ + struct super_block *sb = dir->i_sb; + struct inode *inode; + struct timespec ts; + FILE_ID_T fid; + loff_t i_pos; + int err; + + __lock_super(sb); + + PRINTK("exfat_create entered\n"); + + ts = CURRENT_TIME_SEC; + + err = FsCreateFile(dir, (UINT8 *) dentry->d_name.name, FM_REGULAR, &fid); + if (err) { + if (err == FFS_INVALIDPATH) + err = -EINVAL; + else if (err == FFS_FILEEXIST) + err = -EEXIST; + else if (err == FFS_FULL) + err = -ENOSPC; + else if (err == FFS_NAMETOOLONG) + err = -ENAMETOOLONG; + else + err = -EIO; + goto out; + } + dir->i_version++; + dir->i_ctime = dir->i_mtime = dir->i_atime = ts; + if (IS_DIRSYNC(dir)) + (void) exfat_sync_inode(dir); + else + mark_inode_dirty(dir); + + i_pos = ((loff_t) fid.dir.dir << 32) | (fid.entry & 0xffffffff); + + inode = exfat_build_inode(sb, &fid, i_pos); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto out; + } + inode->i_version++; + inode->i_mtime = inode->i_atime = inode->i_ctime = ts; + /* timestamp is already written, so mark_inode_dirty() is unnecessary. */ + + dentry->d_time = dentry->d_parent->d_inode->i_version; + d_instantiate(dentry, inode); + +out: + __unlock_super(sb); + PRINTK("exfat_create exited\n"); + return err; +} + +static int exfat_find(struct inode *dir, struct qstr *qname, + FILE_ID_T *fid) +{ + int err; + + if (qname->len == 0) + return -ENOENT; + + err = FsLookupFile(dir, (UINT8 *) qname->name, fid); + if (err) + return -ENOENT; + + return 0; +} + +static int exfat_d_anon_disconn(struct dentry *dentry) +{ + return IS_ROOT(dentry) && (dentry->d_flags & DCACHE_DISCONNECTED); +} + +static struct dentry *exfat_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) +{ + struct super_block *sb = dir->i_sb; + struct inode *inode; + struct dentry *alias; + int err; + FILE_ID_T fid; + loff_t i_pos; + UINT64 ret; + mode_t i_mode; + + __lock_super(sb); + PRINTK("exfat_lookup entered\n"); + err = exfat_find(dir, &dentry->d_name, &fid); + if (err) { + if (err == -ENOENT) { + inode = NULL; + goto out; + } + goto error; + } + + i_pos = ((loff_t) fid.dir.dir << 32) | (fid.entry & 0xffffffff); + inode = exfat_build_inode(sb, &fid, i_pos); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto error; + } + + i_mode = inode->i_mode; + if (S_ISLNK(i_mode)) { + EXFAT_I(inode)->target = MALLOC(i_size_read(inode)+1); + if (!EXFAT_I(inode)->target) { + err = -ENOMEM; + goto error; + } + FsReadFile(dir, &fid, EXFAT_I(inode)->target, i_size_read(inode), &ret); + *(EXFAT_I(inode)->target + i_size_read(inode)) = '\0'; + } + + alias = d_find_alias(inode); + if (alias && !exfat_d_anon_disconn(alias)) { + CHECK_ERR(d_unhashed(alias)); + if (!S_ISDIR(i_mode)) + d_move(alias, dentry); + iput(inode); + __unlock_super(sb); + PRINTK("exfat_lookup exited 1\n"); + return alias; + } else { + dput(alias); + } +out: + __unlock_super(sb); + dentry->d_time = dentry->d_parent->d_inode->i_version; + dentry = d_splice_alias(inode, dentry); + if (dentry) + dentry->d_time = dentry->d_parent->d_inode->i_version; + PRINTK("exfat_lookup exited 2\n"); + return dentry; + +error: + __unlock_super(sb); + PRINTK("exfat_lookup exited 3\n"); + return ERR_PTR(err); +} + +static int exfat_unlink(struct inode *dir, struct dentry *dentry) +{ + struct inode *inode = dentry->d_inode; + struct super_block *sb = dir->i_sb; + struct timespec ts; + int err; + + __lock_super(sb); + + PRINTK("exfat_unlink entered\n"); + + ts = CURRENT_TIME_SEC; + + EXFAT_I(inode)->fid.size = i_size_read(inode); + + err = FsRemoveFile(dir, &(EXFAT_I(inode)->fid)); + if (err) { + if (err == FFS_PERMISSIONERR) + err = -EPERM; + else + err = -EIO; + goto out; + } + dir->i_version++; + dir->i_mtime = dir->i_atime = ts; + if (IS_DIRSYNC(dir)) + (void) exfat_sync_inode(dir); + else + mark_inode_dirty(dir); + + clear_nlink(inode); + inode->i_mtime = inode->i_atime = ts; + exfat_detach(inode); + remove_inode_hash(inode); + +out: + __unlock_super(sb); + PRINTK("exfat_unlink exited\n"); + return err; +} + +static int exfat_symlink(struct inode *dir, struct dentry *dentry, const char *target) +{ + struct super_block *sb = dir->i_sb; + struct inode *inode; + struct timespec ts; + FILE_ID_T fid; + loff_t i_pos; + int err; + UINT64 len = (UINT64) strlen(target); + UINT64 ret; + + __lock_super(sb); + + PRINTK("exfat_symlink entered\n"); + + ts = CURRENT_TIME_SEC; + + err = FsCreateFile(dir, (UINT8 *) dentry->d_name.name, FM_SYMLINK, &fid); + if (err) { + if (err == FFS_INVALIDPATH) + err = -EINVAL; + else if (err == FFS_FILEEXIST) + err = -EEXIST; + else if (err == FFS_FULL) + err = -ENOSPC; + else + err = -EIO; + goto out; + } + + err = FsWriteFile(dir, &fid, (char *) target, len, &ret); + + if (err) { + FsRemoveFile(dir, &fid); + + if (err == FFS_FULL) + err = -ENOSPC; + else + err = -EIO; + goto out; + } + + dir->i_version++; + dir->i_ctime = dir->i_mtime = dir->i_atime = ts; + if (IS_DIRSYNC(dir)) + (void) exfat_sync_inode(dir); + else + mark_inode_dirty(dir); + + i_pos = ((loff_t) fid.dir.dir << 32) | (fid.entry & 0xffffffff); + + inode = exfat_build_inode(sb, &fid, i_pos); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto out; + } + inode->i_version++; + inode->i_mtime = inode->i_atime = inode->i_ctime = ts; + /* timestamp is already written, so mark_inode_dirty() is unneeded. */ + + EXFAT_I(inode)->target = MALLOC(len+1); + if (!EXFAT_I(inode)->target) { + err = -ENOMEM; + goto out; + } + MEMCPY(EXFAT_I(inode)->target, target, len+1); + + dentry->d_time = dentry->d_parent->d_inode->i_version; + d_instantiate(dentry, inode); + +out: + __unlock_super(sb); + PRINTK("exfat_symlink exited\n"); + return err; +} + +static int exfat_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) +{ + struct super_block *sb = dir->i_sb; + struct inode *inode; + struct timespec ts; + FILE_ID_T fid; + loff_t i_pos; + int err; + + __lock_super(sb); + + PRINTK("exfat_mkdir entered\n"); + + ts = CURRENT_TIME_SEC; + + err = FsCreateDir(dir, (UINT8 *) dentry->d_name.name, &fid); + if (err) { + if (err == FFS_INVALIDPATH) + err = -EINVAL; + else if (err == FFS_FILEEXIST) + err = -EEXIST; + else if (err == FFS_FULL) + err = -ENOSPC; + else if (err == FFS_NAMETOOLONG) + err = -ENAMETOOLONG; + else + err = -EIO; + goto out; + } + dir->i_version++; + dir->i_ctime = dir->i_mtime = dir->i_atime = ts; + if (IS_DIRSYNC(dir)) + (void) exfat_sync_inode(dir); + else + mark_inode_dirty(dir); + inc_nlink(dir); + + i_pos = ((loff_t) fid.dir.dir << 32) | (fid.entry & 0xffffffff); + + inode = exfat_build_inode(sb, &fid, i_pos); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto out; + } + inode->i_version++; + inode->i_mtime = inode->i_atime = inode->i_ctime = ts; + /* timestamp is already written, so mark_inode_dirty() is unneeded. */ + + dentry->d_time = dentry->d_parent->d_inode->i_version; + d_instantiate(dentry, inode); + +out: + __unlock_super(sb); + PRINTK("exfat_mkdir exited\n"); + return err; +} + +static int exfat_rmdir(struct inode *dir, struct dentry *dentry) +{ + struct inode *inode = dentry->d_inode; + struct super_block *sb = dir->i_sb; + struct timespec ts; + int err; + + __lock_super(sb); + + PRINTK("exfat_rmdir entered\n"); + + ts = CURRENT_TIME_SEC; + + EXFAT_I(inode)->fid.size = i_size_read(inode); + + err = FsRemoveDir(dir, &(EXFAT_I(inode)->fid)); + if (err) { + if (err == FFS_INVALIDPATH) + err = -EINVAL; + else if (err == FFS_FILEEXIST) + err = -ENOTEMPTY; + else if (err == FFS_NOTFOUND) + err = -ENOENT; + else if (err == FFS_DIRBUSY) + err = -EBUSY; + else + err = -EIO; + goto out; + } + dir->i_version++; + dir->i_mtime = dir->i_atime = ts; + if (IS_DIRSYNC(dir)) + (void) exfat_sync_inode(dir); + else + mark_inode_dirty(dir); + drop_nlink(dir); + + clear_nlink(inode); + inode->i_mtime = inode->i_atime = ts; + exfat_detach(inode); + remove_inode_hash(inode); + +out: + __unlock_super(sb); + PRINTK("exfat_rmdir exited\n"); + return err; +} + +static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry) +{ + struct inode *old_inode, *new_inode; + struct super_block *sb = old_dir->i_sb; + struct timespec ts; + loff_t i_pos; + int err; + + __lock_super(sb); + + PRINTK("exfat_rename entered\n"); + + old_inode = old_dentry->d_inode; + new_inode = new_dentry->d_inode; + + ts = CURRENT_TIME_SEC; + + EXFAT_I(old_inode)->fid.size = i_size_read(old_inode); + + err = FsMoveFile(old_dir, &(EXFAT_I(old_inode)->fid), new_dir, new_dentry); + if (err) { + if (err == FFS_PERMISSIONERR) + err = -EPERM; + else if (err == FFS_INVALIDPATH) + err = -EINVAL; + else if (err == FFS_FILEEXIST) + err = -EEXIST; + else if (err == FFS_NOTFOUND) + err = -ENOENT; + else if (err == FFS_FULL) + err = -ENOSPC; + else + err = -EIO; + goto out; + } + new_dir->i_version++; + new_dir->i_ctime = new_dir->i_mtime = new_dir->i_atime = ts; + if (IS_DIRSYNC(new_dir)) + (void) exfat_sync_inode(new_dir); + else + mark_inode_dirty(new_dir); + + i_pos = ((loff_t) EXFAT_I(old_inode)->fid.dir.dir << 32) | + (EXFAT_I(old_inode)->fid.entry & 0xffffffff); + + exfat_detach(old_inode); + exfat_attach(old_inode, i_pos); + if (IS_DIRSYNC(new_dir)) + (void) exfat_sync_inode(old_inode); + else + mark_inode_dirty(old_inode); + + if ((S_ISDIR(old_inode->i_mode)) && (old_dir != new_dir)) { + drop_nlink(old_dir); + if (!new_inode) inc_nlink(new_dir); + } + + old_dir->i_version++; + old_dir->i_ctime = old_dir->i_mtime = ts; + if (IS_DIRSYNC(old_dir)) + (void) exfat_sync_inode(old_dir); + else + mark_inode_dirty(old_dir); + + if (new_inode) { + exfat_detach(new_inode); + drop_nlink(new_inode); + if (S_ISDIR(new_inode->i_mode)) + drop_nlink(new_inode); + new_inode->i_ctime = ts; + } + +out: + __unlock_super(sb); + PRINTK("exfat_rename exited\n"); + return err; +} + +static int exfat_cont_expand(struct inode *inode, loff_t size) +{ + struct address_space *mapping = inode->i_mapping; + loff_t start = i_size_read(inode), count = size - i_size_read(inode); + int err, err2; + + if ((err = generic_cont_expand_simple(inode, size)) != 0) + return err; + + inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC; + mark_inode_dirty(inode); + + if (IS_SYNC(inode)) { + err = filemap_fdatawrite_range(mapping, start, start + count - 1); + err2 = sync_mapping_buffers(mapping); + err = (err)?(err):(err2); + err2 = write_inode_now(inode, 1); + err = (err)?(err):(err2); + if (!err) { + err = filemap_fdatawait_range(mapping, start, start + count - 1); + } + } + return err; +} + +static int exfat_allow_set_time(struct exfat_sb_info *sbi, struct inode *inode) +{ + mode_t allow_utime = sbi->options.allow_utime; + + if (current_fsuid() != inode->i_uid) { + if (in_group_p(inode->i_gid)) + allow_utime >>= 3; + if (allow_utime & MAY_WRITE) + return 1; + } + + /* use a default check */ + return 0; +} + +static int exfat_sanitize_mode(const struct exfat_sb_info *sbi, + struct inode *inode, umode_t *mode_ptr) +{ + mode_t i_mode, mask, perm; + + i_mode = inode->i_mode; + + if (S_ISREG(i_mode) || S_ISLNK(i_mode)) + mask = sbi->options.fs_fmask; + else + mask = sbi->options.fs_dmask; + + perm = *mode_ptr & ~(S_IFMT | mask); + + /* Of the r and x bits, all (subject to umask) must be present.*/ + if ((perm & (S_IRUGO | S_IXUGO)) != (i_mode & (S_IRUGO|S_IXUGO))) + return -EPERM; + + if (exfat_mode_can_hold_ro(inode)) { + /* Of the w bits, either all (subject to umask) or none must be present. */ + if ((perm & S_IWUGO) && ((perm & S_IWUGO) != (S_IWUGO & ~mask))) + return -EPERM; + } else { + /* If exfat_mode_can_hold_ro(inode) is false, can't change w bits. */ + if ((perm & S_IWUGO) != (S_IWUGO & ~mask)) + return -EPERM; + } + + *mode_ptr &= S_IFMT | perm; + + return 0; +} + +static int exfat_setattr(struct dentry *dentry, struct iattr *attr) +{ + + struct exfat_sb_info *sbi = EXFAT_SB(dentry->d_sb); + struct inode *inode = dentry->d_inode; + unsigned int ia_valid; + int error; + loff_t old_size; + + PRINTK("exfat_setattr entered\n"); + + if ((attr->ia_valid & ATTR_SIZE) + && (attr->ia_size > i_size_read(inode))) { + error = exfat_cont_expand(inode, attr->ia_size); + if (error || attr->ia_valid == ATTR_SIZE) + return error; + attr->ia_valid &= ~ATTR_SIZE; + } + + ia_valid = attr->ia_valid; + + if ((ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)) + && exfat_allow_set_time(sbi, inode)) { + attr->ia_valid &= ~(ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET); + } + + error = inode_change_ok(inode, attr); + attr->ia_valid = ia_valid; + if (error) { + return error; + } + + if (((attr->ia_valid & ATTR_UID) && + (attr->ia_uid != sbi->options.fs_uid)) || + ((attr->ia_valid & ATTR_GID) && + (attr->ia_gid != sbi->options.fs_gid)) || + ((attr->ia_valid & ATTR_MODE) && + (attr->ia_mode & ~(S_IFREG | S_IFLNK | S_IFDIR | S_IRWXUGO)))) { + return -EPERM; + } + + /* + * We don't return -EPERM here. Yes, strange, but this is too + * old behavior. + */ + if (attr->ia_valid & ATTR_MODE) { + if (exfat_sanitize_mode(sbi, inode, &attr->ia_mode) < 0) + attr->ia_valid &= ~ATTR_MODE; + } + + EXFAT_I(inode)->fid.size = i_size_read(inode); + + if (attr->ia_valid & ATTR_SIZE) { + old_size = i_size_read(inode); + down_write(&EXFAT_I(inode)->truncate_lock); + truncate_setsize(inode, attr->ia_size); + _exfat_truncate(inode, old_size); + up_write(&EXFAT_I(inode)->truncate_lock); + } + setattr_copy(inode, attr); + mark_inode_dirty(inode); + + PRINTK("exfat_setattr exited\n"); + return error; +} + +static int exfat_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) +{ + struct inode *inode = dentry->d_inode; + + PRINTK("exfat_getattr entered\n"); + + generic_fillattr(inode, stat); + stat->blksize = EXFAT_SB(inode->i_sb)->fs_info.cluster_size; + + PRINTK("exfat_getattr exited\n"); + return 0; +} + +const struct inode_operations exfat_dir_inode_operations = { + .create = exfat_create, + .lookup = exfat_lookup, + .unlink = exfat_unlink, + .symlink = exfat_symlink, + .mkdir = exfat_mkdir, + .rmdir = exfat_rmdir, + .rename = exfat_rename, + .setattr = exfat_setattr, + .getattr = exfat_getattr, +}; + +static void *exfat_follow_link(struct dentry *dentry, struct nameidata *nd) +{ + struct exfat_inode_info *ei = EXFAT_I(dentry->d_inode); + nd_set_link(nd, (char *)(ei->target)); + return NULL; +} + +const struct inode_operations exfat_symlink_inode_operations = { + .readlink = generic_readlink, + .follow_link = exfat_follow_link, +}; + +static int exfat_file_release(struct inode *inode, struct file *filp) +{ + struct super_block *sb = inode->i_sb; + + EXFAT_I(inode)->fid.size = i_size_read(inode); + FsSyncVol(sb, 0); + return 0; +} + +const struct file_operations exfat_file_operations = { + .llseek = generic_file_llseek, + .read = do_sync_read, + .write = do_sync_write, + .aio_read = generic_file_aio_read, + .aio_write = generic_file_aio_write, + .mmap = generic_file_mmap, + .release = exfat_file_release, + .unlocked_ioctl = exfat_generic_ioctl, + .fsync = generic_file_fsync, + .splice_read = generic_file_splice_read, +}; + +static void _exfat_truncate(struct inode *inode, loff_t old_size) +{ + struct super_block *sb = inode->i_sb; + struct exfat_sb_info *sbi = EXFAT_SB(sb); + FS_INFO_T *p_fs = &(sbi->fs_info); + int err; + + __lock_super(sb); + + /* + * This protects against truncating a file bigger than it was then + * trying to write into the hole. + */ + if (EXFAT_I(inode)->mmu_private > i_size_read(inode)) + EXFAT_I(inode)->mmu_private = i_size_read(inode); + + if (EXFAT_I(inode)->fid.start_clu == 0) goto out; + + err = FsTruncateFile(inode, old_size, i_size_read(inode)); + if (err) goto out; + + inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC; + if (IS_DIRSYNC(inode)) + (void) exfat_sync_inode(inode); + else + mark_inode_dirty(inode); + + inode->i_blocks = ((i_size_read(inode) + (p_fs->cluster_size - 1)) + & ~((loff_t)p_fs->cluster_size - 1)) >> 9; +out: + __unlock_super(sb); +} + +const struct inode_operations exfat_file_inode_operations = { + .setattr = exfat_setattr, + .getattr = exfat_getattr, +}; + +static int exfat_bmap(struct inode *inode, sector_t sector, sector_t *phys, + unsigned long *mapped_blocks, int *create) +{ + struct super_block *sb = inode->i_sb; + struct exfat_sb_info *sbi = EXFAT_SB(sb); + FS_INFO_T *p_fs = &(sbi->fs_info); + BD_INFO_T *p_bd = &(sbi->bd_info); + const unsigned long blocksize = sb->s_blocksize; + const unsigned char blocksize_bits = sb->s_blocksize_bits; + sector_t last_block; + int err, clu_offset, sec_offset; + unsigned int cluster; + + *phys = 0; + *mapped_blocks = 0; + + if ((p_fs->vol_type == FAT12) || (p_fs->vol_type == FAT16)) { + if (inode->i_ino == EXFAT_ROOT_INO) { + if (sector < (p_fs->dentries_in_root >> (p_bd->sector_size_bits-DENTRY_SIZE_BITS))) { + *phys = sector + p_fs->root_start_sector; + *mapped_blocks = 1; + } + return 0; + } + } + + last_block = (i_size_read(inode) + (blocksize - 1)) >> blocksize_bits; + if (sector >= last_block) { + if (*create == 0) return 0; + } else { + *create = 0; + } + + clu_offset = sector >> p_fs->sectors_per_clu_bits; + sec_offset = sector & (p_fs->sectors_per_clu - 1); + + EXFAT_I(inode)->fid.size = i_size_read(inode); + + err = FsMapCluster(inode, clu_offset, &cluster); + + if (err) { + if (err == FFS_FULL) + return -ENOSPC; + else + return -EIO; + } else if (cluster != CLUSTER_32(~0)) { + *phys = START_SECTOR(cluster) + sec_offset; + *mapped_blocks = p_fs->sectors_per_clu - sec_offset; + } + + return 0; +} + +static int exfat_get_block(struct inode *inode, sector_t iblock, + struct buffer_head *bh_result, int create) +{ + struct super_block *sb = inode->i_sb; + unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits; + int err; + unsigned long mapped_blocks; + sector_t phys; + + __lock_super(sb); + + err = exfat_bmap(inode, iblock, &phys, &mapped_blocks, &create); + if (err) { + __unlock_super(sb); + return err; + } + + if (phys) { + max_blocks = min(mapped_blocks, max_blocks); + if (create) { + EXFAT_I(inode)->mmu_private += max_blocks << sb->s_blocksize_bits; + set_buffer_new(bh_result); + } + map_bh(bh_result, sb, phys); + } + + bh_result->b_size = max_blocks << sb->s_blocksize_bits; + __unlock_super(sb); + + return 0; +} + +static int exfat_readpage(struct file *file, struct page *page) +{ + int ret; + ret = mpage_readpage(page, exfat_get_block); + return ret; +} + +static int exfat_readpages(struct file *file, struct address_space *mapping, + struct list_head *pages, unsigned nr_pages) +{ + int ret; + ret = mpage_readpages(mapping, pages, nr_pages, exfat_get_block); + return ret; +} + +static int exfat_writepage(struct page *page, struct writeback_control *wbc) +{ + int ret; + ret = block_write_full_page(page, exfat_get_block, wbc); + return ret; +} + +static int exfat_writepages(struct address_space *mapping, + struct writeback_control *wbc) +{ + int ret; + ret = mpage_writepages(mapping, wbc, exfat_get_block); + return ret; +} + +static void exfat_write_failed(struct address_space *mapping, loff_t to) +{ + struct inode *inode = mapping->host; + if (to > i_size_read(inode)) { + truncate_pagecache(inode, to, i_size_read(inode)); + EXFAT_I(inode)->fid.size = i_size_read(inode); + _exfat_truncate(inode, i_size_read(inode)); + } +} + +static int exfat_write_begin(struct file *file, struct address_space *mapping, + loff_t pos, unsigned len, unsigned flags, + struct page **pagep, void **fsdata) +{ + int ret; + *pagep = NULL; + ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, + exfat_get_block, + &EXFAT_I(mapping->host)->mmu_private); + + if (ret < 0) + exfat_write_failed(mapping, pos+len); + return ret; +} + +static int exfat_write_end(struct file *file, struct address_space *mapping, + loff_t pos, unsigned len, unsigned copied, + struct page *pagep, void *fsdata) +{ + struct inode *inode = mapping->host; + FILE_ID_T *fid = &(EXFAT_I(inode)->fid); + int err; + + err = generic_write_end(file, mapping, pos, len, copied, pagep, fsdata); + + if (err < len) + exfat_write_failed(mapping, pos+len); + + if (!(err < 0) && !(fid->attr & ATTR_ARCHIVE)) { + inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; + fid->attr |= ATTR_ARCHIVE; + mark_inode_dirty(inode); + } + return err; +} + +static ssize_t exfat_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, + loff_t offset, unsigned long nr_segs) +{ + struct inode *inode = iocb->ki_filp->f_mapping->host; + struct address_space *mapping = iocb->ki_filp->f_mapping; + ssize_t ret; + + if (rw == WRITE) { + if (EXFAT_I(inode)->mmu_private < (offset + iov_length(iov, nr_segs))) + return 0; + } + ret = blockdev_direct_IO(rw, iocb, inode, iov, + offset, nr_segs, exfat_get_block); + + if ((ret < 0) && (rw & WRITE)) + exfat_write_failed(mapping, offset+iov_length(iov, nr_segs)); + + return ret; +} + +static sector_t _exfat_bmap(struct address_space *mapping, sector_t block) +{ + sector_t blocknr; + + /* exfat_get_cluster() assumes the requested blocknr isn't truncated. */ + down_read(&EXFAT_I(mapping->host)->truncate_lock); + blocknr = generic_block_bmap(mapping, block, exfat_get_block); + up_read(&EXFAT_I(mapping->host)->truncate_lock); + + return blocknr; +} + +const struct address_space_operations exfat_aops = { + .readpage = exfat_readpage, + .readpages = exfat_readpages, + .writepage = exfat_writepage, + .writepages = exfat_writepages, + .write_begin = exfat_write_begin, + .write_end = exfat_write_end, + .direct_IO = exfat_direct_IO, + .bmap = _exfat_bmap +}; + +static inline unsigned long exfat_hash(loff_t i_pos) +{ + return hash_32(i_pos, EXFAT_HASH_BITS); +} + +static struct inode *exfat_iget(struct super_block *sb, loff_t i_pos) { + struct exfat_sb_info *sbi = EXFAT_SB(sb); + struct exfat_inode_info *info; + struct hlist_head *head = sbi->inode_hashtable + exfat_hash(i_pos); + struct inode *inode = NULL; + + spin_lock(&sbi->inode_hash_lock); + hlist_for_each_entry(info, head, i_hash_fat) { + CHECK_ERR(info->vfs_inode.i_sb != sb); + + if (i_pos != info->i_pos) + continue; + inode = igrab(&info->vfs_inode); + if (inode) + break; + } + spin_unlock(&sbi->inode_hash_lock); + return inode; +} + +static void exfat_attach(struct inode *inode, loff_t i_pos) +{ + struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb); + struct hlist_head *head = sbi->inode_hashtable + exfat_hash(i_pos); + + spin_lock(&sbi->inode_hash_lock); + EXFAT_I(inode)->i_pos = i_pos; + hlist_add_head(&EXFAT_I(inode)->i_hash_fat, head); + spin_unlock(&sbi->inode_hash_lock); +} + +static void exfat_detach(struct inode *inode) +{ + struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb); + + spin_lock(&sbi->inode_hash_lock); + hlist_del_init(&EXFAT_I(inode)->i_hash_fat); + EXFAT_I(inode)->i_pos = 0; + spin_unlock(&sbi->inode_hash_lock); +} + +/* doesn't deal with root inode */ +static int exfat_fill_inode(struct inode *inode, FILE_ID_T *fid) +{ + struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb); + FS_INFO_T *p_fs = &(sbi->fs_info); + DIR_ENTRY_T info; + + memcpy(&(EXFAT_I(inode)->fid), fid, sizeof(FILE_ID_T)); + + FsReadStat(inode, &info); + + EXFAT_I(inode)->i_pos = 0; + EXFAT_I(inode)->target = NULL; + inode->i_uid = sbi->options.fs_uid; + inode->i_gid = sbi->options.fs_gid; + inode->i_version++; + inode->i_generation = get_seconds(); + + if (info.Attr & ATTR_SUBDIR) { /* directory */ + inode->i_generation &= ~1; + inode->i_mode = exfat_make_mode(sbi, info.Attr, S_IRWXUGO); + inode->i_op = &exfat_dir_inode_operations; + inode->i_fop = &exfat_dir_operations; + + i_size_write(inode, info.Size); + EXFAT_I(inode)->mmu_private = i_size_read(inode); + set_nlink(inode,info.NumSubdirs); + } else if (info.Attr & ATTR_SYMLINK) { /* symbolic link */ + inode->i_generation |= 1; + inode->i_mode = exfat_make_mode(sbi, info.Attr, S_IRWXUGO); + inode->i_op = &exfat_symlink_inode_operations; + + i_size_write(inode, info.Size); + EXFAT_I(inode)->mmu_private = i_size_read(inode); + } else { /* regular file */ + inode->i_generation |= 1; + inode->i_mode = exfat_make_mode(sbi, info.Attr, S_IRWXUGO); + inode->i_op = &exfat_file_inode_operations; + inode->i_fop = &exfat_file_operations; + inode->i_mapping->a_ops = &exfat_aops; + inode->i_mapping->nrpages = 0; + + i_size_write(inode, info.Size); + EXFAT_I(inode)->mmu_private = i_size_read(inode); + } + exfat_save_attr(inode, info.Attr); + + inode->i_blocks = ((i_size_read(inode) + (p_fs->cluster_size - 1)) + & ~((loff_t)p_fs->cluster_size - 1)) >> 9; + + exfat_time_fat2unix(sbi, &inode->i_mtime, &info.ModifyTimestamp); + exfat_time_fat2unix(sbi, &inode->i_ctime, &info.CreateTimestamp); + exfat_time_fat2unix(sbi, &inode->i_atime, &info.AccessTimestamp); + + return 0; +} + +static struct inode *exfat_build_inode(struct super_block *sb, + FILE_ID_T *fid, loff_t i_pos) { + struct inode *inode; + int err; + + inode = exfat_iget(sb, i_pos); + if (inode) + goto out; + inode = new_inode(sb); + if (!inode) { + inode = ERR_PTR(-ENOMEM); + goto out; + } + inode->i_ino = iunique(sb, EXFAT_ROOT_INO); + inode->i_version = 1; + err = exfat_fill_inode(inode, fid); + if (err) { + iput(inode); + inode = ERR_PTR(err); + goto out; + } + exfat_attach(inode, i_pos); + insert_inode_hash(inode); +out: + return inode; +} + +static int exfat_sync_inode(struct inode *inode) +{ + return exfat_write_inode(inode, NULL); +} + +static struct inode *exfat_alloc_inode(struct super_block *sb) { + struct exfat_inode_info *ei; + + ei = kmem_cache_alloc(exfat_inode_cachep, GFP_NOFS); + if (!ei) + return NULL; + + init_rwsem(&ei->truncate_lock); + + return &ei->vfs_inode; +} + +static void exfat_destroy_inode(struct inode *inode) +{ + FREE(EXFAT_I(inode)->target); + EXFAT_I(inode)->target = NULL; + + kmem_cache_free(exfat_inode_cachep, EXFAT_I(inode)); +} + +static int exfat_write_inode(struct inode *inode, struct writeback_control *wbc) +{ + struct super_block *sb = inode->i_sb; + struct exfat_sb_info *sbi = EXFAT_SB(sb); + DIR_ENTRY_T info; + + if (inode->i_ino == EXFAT_ROOT_INO) + return 0; + + info.Attr = exfat_make_attr(inode); + info.Size = i_size_read(inode); + + exfat_time_unix2fat(sbi, &inode->i_mtime, &info.ModifyTimestamp); + exfat_time_unix2fat(sbi, &inode->i_ctime, &info.CreateTimestamp); + exfat_time_unix2fat(sbi, &inode->i_atime, &info.AccessTimestamp); + + FsWriteStat(inode, &info); + + return 0; +} + +static void exfat_evict_inode(struct inode *inode) +{ + truncate_inode_pages(&inode->i_data, 0); + + if (!inode->i_nlink) + i_size_write(inode, 0); + invalidate_inode_buffers(inode); + clear_inode(inode); + exfat_detach(inode); + + remove_inode_hash(inode); +} + +static void exfat_put_super(struct super_block *sb) +{ + struct exfat_sb_info *sbi = EXFAT_SB(sb); + if (__is_sb_dirty(sb)) + exfat_write_super(sb); + + FsUmountVol(sb); + + if (sbi->nls_disk) { + unload_nls(sbi->nls_disk); + sbi->nls_disk = NULL; + sbi->options.codepage = exfat_default_codepage; + } + if (sbi->nls_io) { + unload_nls(sbi->nls_io); + sbi->nls_io = NULL; + } + if (sbi->options.iocharset != exfat_default_iocharset) { + kfree(sbi->options.iocharset); + sbi->options.iocharset = exfat_default_iocharset; + } + + sb->s_fs_info = NULL; + kfree(sbi); +} + +static void exfat_write_super(struct super_block *sb) +{ + __lock_super(sb); + + __set_sb_clean(sb); + + if (!(sb->s_flags & MS_RDONLY)) + FsSyncVol(sb, 1); + + __unlock_super(sb); +} + +static int exfat_sync_fs(struct super_block *sb, int wait) +{ + int err = 0; + + if (__is_sb_dirty(sb)) { + __lock_super(sb); + __set_sb_clean(sb); + err = FsSyncVol(sb, 1); + __unlock_super(sb); + } + + return err; +} + +static int exfat_statfs(struct dentry *dentry, struct kstatfs *buf) +{ + struct super_block *sb = dentry->d_sb; + u64 id = huge_encode_dev(sb->s_bdev->bd_dev); + FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info); + VOL_INFO_T info; + + if (p_fs->used_clusters == (UINT32) ~0) { + if (FFS_MEDIAERR == FsGetVolInfo(sb, &info)) + return -EIO; + + } else { + info.FatType = p_fs->vol_type; + info.ClusterSize = p_fs->cluster_size; + info.NumClusters = p_fs->num_clusters - 2; + info.UsedClusters = p_fs->used_clusters; + info.FreeClusters = info.NumClusters - info.UsedClusters; + + if (p_fs->dev_ejected) + return -EIO; + } + + buf->f_type = sb->s_magic; + buf->f_bsize = info.ClusterSize; + buf->f_blocks = info.NumClusters; + buf->f_bfree = info.FreeClusters; + buf->f_bavail = info.FreeClusters; + buf->f_fsid.val[0] = (u32)id; + buf->f_fsid.val[1] = (u32)(id >> 32); + buf->f_namelen = 260; + + return 0; +} + +static int exfat_remount(struct super_block *sb, int *flags, char *data) +{ + *flags |= MS_NODIRATIME; + return 0; +} + +static int exfat_show_options(struct seq_file *m, struct dentry *root) +{ + struct exfat_sb_info *sbi = EXFAT_SB(root->d_sb); + struct exfat_mount_options *opts = &sbi->options; + + if (opts->fs_uid != 0) + seq_printf(m, ",uid=%u", opts->fs_uid); + if (opts->fs_gid != 0) + seq_printf(m, ",gid=%u", opts->fs_gid); + seq_printf(m, ",fmask=%04o", opts->fs_fmask); + seq_printf(m, ",dmask=%04o", opts->fs_dmask); + if (opts->allow_utime) + seq_printf(m, ",allow_utime=%04o", opts->allow_utime); + if (sbi->nls_disk) + seq_printf(m, ",codepage=%s", sbi->nls_disk->charset); + if (sbi->nls_io) + seq_printf(m, ",iocharset=%s", sbi->nls_io->charset); + seq_printf(m, ",namecase=%u", opts->casesensitive); + if (opts->errors == EXFAT_ERRORS_CONT) + seq_puts(m, ",errors=continue"); + else if (opts->errors == EXFAT_ERRORS_PANIC) + seq_puts(m, ",errors=panic"); + else + seq_puts(m, ",errors=remount-ro"); +#ifdef CONFIG_EXFAT_DISCARD + if (opts->discard) + seq_printf(m, ",discard"); +#endif + return 0; +} + +const struct super_operations exfat_sops = { + .alloc_inode = exfat_alloc_inode, + .destroy_inode = exfat_destroy_inode, + .write_inode = exfat_write_inode, + .evict_inode = exfat_evict_inode, + .put_super = exfat_put_super, + .sync_fs = exfat_sync_fs, + .statfs = exfat_statfs, + .remount_fs = exfat_remount, + .show_options = exfat_show_options, +}; + +enum { + Opt_uid, + Opt_gid, + Opt_umask, + Opt_dmask, + Opt_fmask, + Opt_allow_utime, + Opt_codepage, + Opt_charset, + Opt_namecase, + Opt_debug, + Opt_err_cont, + Opt_err_panic, + Opt_err_ro, + Opt_err, +#ifdef CONFIG_EXFAT_DISCARD + Opt_discard, +#endif +}; + +static const match_table_t exfat_tokens = { + {Opt_uid, "uid=%u"}, + {Opt_gid, "gid=%u"}, + {Opt_umask, "umask=%o"}, + {Opt_dmask, "dmask=%o"}, + {Opt_fmask, "fmask=%o"}, + {Opt_allow_utime, "allow_utime=%o"}, + {Opt_codepage, "codepage=%u"}, + {Opt_charset, "iocharset=%s"}, + {Opt_namecase, "namecase=%u"}, + {Opt_debug, "debug"}, + {Opt_err_cont, "errors=continue"}, + {Opt_err_panic, "errors=panic"}, + {Opt_err_ro, "errors=remount-ro"}, +#ifdef CONFIG_EXFAT_DISCARD + {Opt_discard, "discard"}, +#endif + {Opt_err, NULL} +}; + +static int parse_options(char *options, int silent, int *debug, + struct exfat_mount_options *opts) +{ + char *p; + substring_t args[MAX_OPT_ARGS]; + int option; + char *iocharset; + + opts->fs_uid = current_uid(); + opts->fs_gid = current_gid(); + opts->fs_fmask = opts->fs_dmask = current->fs->umask; + opts->allow_utime = (unsigned short) -1; + opts->codepage = exfat_default_codepage; + opts->iocharset = exfat_default_iocharset; + opts->casesensitive = 0; + opts->errors = EXFAT_ERRORS_RO; +#ifdef CONFIG_EXFAT_DISCARD + opts->discard = 0; +#endif + *debug = 0; + + if (!options) + goto out; + + while ((p = strsep(&options, ",")) != NULL) { + int token; + if (!*p) + continue; + + token = match_token(p, exfat_tokens, args); + switch (token) { + case Opt_uid: + if (match_int(&args[0], &option)) + return 0; + opts->fs_uid = option; + break; + case Opt_gid: + if (match_int(&args[0], &option)) + return 0; + opts->fs_gid = option; + break; + case Opt_umask: + case Opt_dmask: + case Opt_fmask: + if (match_octal(&args[0], &option)) + return 0; + if (token != Opt_dmask) + opts->fs_fmask = option; + if (token != Opt_fmask) + opts->fs_dmask = option; + break; + case Opt_allow_utime: + if (match_octal(&args[0], &option)) + return 0; + opts->allow_utime = option & (S_IWGRP | S_IWOTH); + break; + case Opt_codepage: + if (match_int(&args[0], &option)) + return 0; + opts->codepage = option; + break; + case Opt_charset: + if (opts->iocharset != exfat_default_iocharset) + kfree(opts->iocharset); + iocharset = match_strdup(&args[0]); + if (!iocharset) + return -ENOMEM; + opts->iocharset = iocharset; + break; + case Opt_namecase: + if (match_int(&args[0], &option)) + return 0; + opts->casesensitive = option; + break; + case Opt_err_cont: + opts->errors = EXFAT_ERRORS_CONT; + break; + case Opt_err_panic: + opts->errors = EXFAT_ERRORS_PANIC; + break; + case Opt_err_ro: + opts->errors = EXFAT_ERRORS_RO; + break; + case Opt_debug: + *debug = 1; + break; +#ifdef CONFIG_EXFAT_DISCARD + case Opt_discard: + opts->discard = 1; + break; +#endif + default: + if (!silent) { + printk(KERN_ERR "[EXFAT] Unrecognized mount option %s or missing value\n", p); + } + return -EINVAL; + } + } + +out: + if (opts->allow_utime == (unsigned short) -1) + opts->allow_utime = ~opts->fs_dmask & (S_IWGRP | S_IWOTH); + + return 0; +} + +static void exfat_hash_init(struct super_block *sb) +{ + struct exfat_sb_info *sbi = EXFAT_SB(sb); + int i; + + spin_lock_init(&sbi->inode_hash_lock); + for (i = 0; i < EXFAT_HASH_SIZE; i++) + INIT_HLIST_HEAD(&sbi->inode_hashtable[i]); +} + +static int exfat_read_root(struct inode *inode) +{ + struct super_block *sb = inode->i_sb; + struct exfat_sb_info *sbi = EXFAT_SB(sb); + struct timespec ts; + FS_INFO_T *p_fs = &(sbi->fs_info); + DIR_ENTRY_T info; + + ts = CURRENT_TIME_SEC; + + EXFAT_I(inode)->fid.dir.dir = p_fs->root_dir; + EXFAT_I(inode)->fid.dir.flags = 0x01; + EXFAT_I(inode)->fid.entry = -1; + EXFAT_I(inode)->fid.start_clu = p_fs->root_dir; + EXFAT_I(inode)->fid.flags = 0x01; + EXFAT_I(inode)->fid.type = TYPE_DIR; + EXFAT_I(inode)->fid.rwoffset = 0; + EXFAT_I(inode)->fid.hint_last_off = -1; + + EXFAT_I(inode)->target = NULL; + + FsReadStat(inode, &info); + + inode->i_uid = sbi->options.fs_uid; + inode->i_gid = sbi->options.fs_gid; + inode->i_version++; + inode->i_generation = 0; + inode->i_mode = exfat_make_mode(sbi, ATTR_SUBDIR, S_IRWXUGO); + inode->i_op = &exfat_dir_inode_operations; + inode->i_fop = &exfat_dir_operations; + + i_size_write(inode, info.Size); + inode->i_blocks = ((i_size_read(inode) + (p_fs->cluster_size - 1)) + & ~((loff_t)p_fs->cluster_size - 1)) >> 9; + EXFAT_I(inode)->i_pos = ((loff_t) p_fs->root_dir << 32) | 0xffffffff; + EXFAT_I(inode)->mmu_private = i_size_read(inode); + + exfat_save_attr(inode, ATTR_SUBDIR); + inode->i_mtime = inode->i_atime = inode->i_ctime = ts; + set_nlink(inode,info.NumSubdirs + 2); + + return 0; +} + +static int exfat_fill_super(struct super_block *sb, void *data, int silent) +{ + struct inode *root_inode = NULL; + struct exfat_sb_info *sbi; + int debug, ret; + long error; + char buf[50]; + + /* + * GFP_KERNEL is ok here, because while we do hold the + * supeblock lock, memory pressure can't call back into + * the filesystem, since we're only just about to mount + * it and have no inodes etc active! + */ + sbi = kzalloc(sizeof(struct exfat_sb_info), GFP_KERNEL); + if (!sbi) + return -ENOMEM; + + mutex_init(&sbi->s_lock); + + sb->s_fs_info = sbi; + sb->s_flags |= MS_NODIRATIME; + sb->s_magic = EXFAT_SUPER_MAGIC; + sb->s_op = &exfat_sops; + + error = parse_options(data, silent, &debug, &sbi->options); + if (error) + goto out_fail; + + error = -EIO; + sb_min_blocksize(sb, 512); + sb->s_maxbytes = 0x7fffffffffffffffLL; + + ret = FsMountVol(sb); + if (ret) { + if (!silent) + printk(KERN_ERR "[EXFAT] FsMountVol failed\n"); + + goto out_fail; + } + + /* set up enough so that it can read an inode */ + exfat_hash_init(sb); + + /* + * The low byte of FAT's first entry must have same value with + * media-field. But in real world, too many devices is + * writing wrong value. So, removed that validity check. + * + * if (FAT_FIRST_ENT(sb, media) != first) + */ + + error = -EINVAL; + sprintf(buf, "cp%d", sbi->options.codepage); + sbi->nls_disk = load_nls(buf); + if (!sbi->nls_disk) { + printk(KERN_ERR "[EXFAT] Codepage %s not found\n", buf); + goto out_fail2; + } + + sbi->nls_io = load_nls(sbi->options.iocharset); + if (!sbi->nls_io) { + printk(KERN_ERR "[EXFAT] IO charset %s not found\n", + sbi->options.iocharset); + goto out_fail2; + } + + error = -ENOMEM; + root_inode = new_inode(sb); + if (!root_inode) + goto out_fail2; + root_inode->i_ino = EXFAT_ROOT_INO; + root_inode->i_version = 1; + error = exfat_read_root(root_inode); + if (error < 0) + goto out_fail2; + error = -ENOMEM; + exfat_attach(root_inode, EXFAT_I(root_inode)->i_pos); + insert_inode_hash(root_inode); + sb->s_root = d_make_root(root_inode); + + if (!sb->s_root) { + printk(KERN_ERR "[EXFAT] Getting the root inode failed\n"); + goto out_fail2; + } + + return 0; + +out_fail2: + FsUmountVol(sb); +out_fail: + if (root_inode) + iput(root_inode); + if (sbi->nls_io) + unload_nls(sbi->nls_io); + if (sbi->nls_disk) + unload_nls(sbi->nls_disk); + if (sbi->options.iocharset != exfat_default_iocharset) + kfree(sbi->options.iocharset); + sb->s_fs_info = NULL; + kfree(sbi); + return error; +} + +static struct dentry *exfat_fs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, + void *data) { + return mount_bdev(fs_type, flags, dev_name, data, exfat_fill_super); +} + +static void init_once(void *foo) +{ + struct exfat_inode_info *ei = (struct exfat_inode_info *)foo; + + INIT_HLIST_NODE(&ei->i_hash_fat); + inode_init_once(&ei->vfs_inode); +} + +static int __init exfat_init_inodecache(void) +{ + exfat_inode_cachep = kmem_cache_create("exfat_inode_cache", + sizeof(struct exfat_inode_info), + 0, (SLAB_RECLAIM_ACCOUNT| + SLAB_MEM_SPREAD), + init_once); + if (exfat_inode_cachep == NULL) + return -ENOMEM; + return 0; +} + +static void __exit exfat_destroy_inodecache(void) +{ + kmem_cache_destroy(exfat_inode_cachep); +} + +#ifdef CONFIG_EXFAT_KERNEL_DEBUG +static void exfat_debug_kill_sb(struct super_block *sb) +{ + struct exfat_sb_info *sbi = EXFAT_SB(sb); + struct block_device *bdev = sb->s_bdev; + + long flags; + + if (sbi) { + flags = sbi->debug_flags; + + if (flags & EXFAT_DEBUGFLAGS_INVALID_UMOUNT) { + /* invalidate_bdev drops all device cache include dirty. + we use this to simulate device removal */ + FsReleaseCache(sb); + invalidate_bdev(bdev); + } + } + + kill_block_super(sb); +} +#endif + +static struct file_system_type exfat_fs_type = { + .owner = THIS_MODULE, + .name = "exfat", + .mount = exfat_fs_mount, +#ifdef CONFIG_EXFAT_KERNEL_DEBUG + .kill_sb = exfat_debug_kill_sb, +#else + .kill_sb = kill_block_super, +#endif + .fs_flags = FS_REQUIRES_DEV, +}; + +static int __init init_exfat_fs(void) +{ + int err; + + printk(KERN_INFO "exFAT: FS Version %s\n", EXFAT_VERSION); + + err = exfat_init_inodecache(); + if (err) return err; + + return register_filesystem(&exfat_fs_type); +} + +static void __exit exit_exfat_fs(void) +{ + exfat_destroy_inodecache(); + unregister_filesystem(&exfat_fs_type); +} + +module_init(init_exfat_fs); +module_exit(exit_exfat_fs); + +MODULE_LICENSE("GPL"); diff --git a/drivers/staging/exfat/exfat_super.h b/drivers/staging/exfat/exfat_super.h new file mode 100644 index 0000000..9063f8b --- /dev/null +++ b/drivers/staging/exfat/exfat_super.h @@ -0,0 +1,153 @@ +/* Some of the source code in this file came from "linux/fs/fat/fat.h". */ + +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef _EXFAT_LINUX_H +#define _EXFAT_LINUX_H + +#include <linux/buffer_head.h> +#include <linux/string.h> +#include <linux/nls.h> +#include <linux/fs.h> +#include <linux/mutex.h> +#include <linux/swap.h> + +#include "exfat_global.h" +#include "exfat_data.h" +#include "exfat_oal.h" + +#include "exfat_blkdev.h" +#include "exfat_cache.h" +#include "exfat_part.h" +#include "exfat_nls.h" +#include "exfat_api.h" +#include "exfat.h" + +#define EXFAT_ERRORS_CONT 1 /* ignore error and continue */ +#define EXFAT_ERRORS_PANIC 2 /* panic on error */ +#define EXFAT_ERRORS_RO 3 /* remount r/o on error */ + +#define EXFAT_IOCTL_GET_VOLUME_ID _IOR('r', 0x12, __u32) + +struct exfat_mount_options { + uid_t fs_uid; + gid_t fs_gid; + unsigned short fs_fmask; + unsigned short fs_dmask; + unsigned short allow_utime; /* permission for setting the [am]time */ + unsigned short codepage; /* codepage for shortname conversions */ + char *iocharset; /* charset for filename input/display */ + unsigned char casesensitive; + unsigned char errors; /* on error: continue, panic, remount-ro */ +#ifdef CONFIG_EXFAT_DISCARD + unsigned char discard; /* flag on if -o dicard specified and device support discard() */ +#endif +}; + +#define EXFAT_HASH_BITS 8 +#define EXFAT_HASH_SIZE (1UL << EXFAT_HASH_BITS) + +struct exfat_sb_info { + FS_INFO_T fs_info; + BD_INFO_T bd_info; + + struct exfat_mount_options options; + + int s_dirt; + struct mutex s_lock; + struct nls_table *nls_disk; /* Codepage used on disk */ + struct nls_table *nls_io; /* Charset used for input and display */ + + struct inode *fat_inode; + + spinlock_t inode_hash_lock; + struct hlist_head inode_hashtable[EXFAT_HASH_SIZE]; +#ifdef CONFIG_EXFAT_KERNEL_DEBUG + long debug_flags; +#endif +}; + +struct exfat_inode_info { + FILE_ID_T fid; + char *target; + loff_t mmu_private; + loff_t i_pos; + struct hlist_node i_hash_fat; + struct rw_semaphore truncate_lock; + struct inode vfs_inode; +}; + +#define EXFAT_SB(sb) ((struct exfat_sb_info *)((sb)->s_fs_info)) + +static inline struct exfat_inode_info *EXFAT_I(struct inode *inode) { + return container_of(inode, struct exfat_inode_info, vfs_inode); +} + +/* + * If ->i_mode can't hold S_IWUGO (i.e. ATTR_RO), we use ->i_attrs to + * save ATTR_RO instead of ->i_mode. + * + * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only + * bit, it's just used as flag for app. + */ +static inline int exfat_mode_can_hold_ro(struct inode *inode) +{ + struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb); + + if (S_ISDIR(inode->i_mode)) + return 0; + + if ((~sbi->options.fs_fmask) & S_IWUGO) + return 1; + return 0; +} + +/* Convert attribute bits and a mask to the UNIX mode. */ +static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi, + u32 attr, mode_t mode) +{ + if ((attr & ATTR_READONLY) && !(attr & ATTR_SUBDIR)) + mode &= ~S_IWUGO; + + if (attr & ATTR_SUBDIR) + return (mode & ~sbi->options.fs_dmask) | S_IFDIR; + else if (attr & ATTR_SYMLINK) + return (mode & ~sbi->options.fs_dmask) | S_IFLNK; + else + return (mode & ~sbi->options.fs_fmask) | S_IFREG; +} + +/* Return the FAT attribute byte for this inode */ +static inline u32 exfat_make_attr(struct inode *inode) +{ + if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & S_IWUGO)) + return ((EXFAT_I(inode)->fid.attr) | ATTR_READONLY); + else + return (EXFAT_I(inode)->fid.attr); +} + +static inline void exfat_save_attr(struct inode *inode, u32 attr) +{ + if (exfat_mode_can_hold_ro(inode)) + EXFAT_I(inode)->fid.attr = attr & ATTR_RWMASK; + else + EXFAT_I(inode)->fid.attr = attr & (ATTR_RWMASK | ATTR_READONLY); +} + +#endif diff --git a/drivers/staging/exfat/exfat_upcase.c b/drivers/staging/exfat/exfat_upcase.c new file mode 100644 index 0000000..b3ccffa --- /dev/null +++ b/drivers/staging/exfat/exfat_upcase.c @@ -0,0 +1,389 @@ +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include "exfat_global.h" + +#include "exfat_nls.h" + +UINT8 uni_upcase[NUM_UPCASE<<1] = { + 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x03, 0x00, 0x04, 0x00, 0x05, 0x00, 0x06, 0x00, 0x07, 0x00, + 0x08, 0x00, 0x09, 0x00, 0x0A, 0x00, 0x0B, 0x00, 0x0C, 0x00, 0x0D, 0x00, 0x0E, 0x00, 0x0F, 0x00, + 0x10, 0x00, 0x11, 0x00, 0x12, 0x00, 0x13, 0x00, 0x14, 0x00, 0x15, 0x00, 0x16, 0x00, 0x17, 0x00, + 0x18, 0x00, 0x19, 0x00, 0x1A, 0x00, 0x1B, 0x00, 0x1C, 0x00, 0x1D, 0x00, 0x1E, 0x00, 0x1F, 0x00, + 0x20, 0x00, 0x21, 0x00, 0x22, 0x00, 0x23, 0x00, 0x24, 0x00, 0x25, 0x00, 0x26, 0x00, 0x27, 0x00, + 0x28, 0x00, 0x29, 0x00, 0x2A, 0x00, 0x2B, 0x00, 0x2C, 0x00, 0x2D, 0x00, 0x2E, 0x00, 0x2F, 0x00, + 0x30, 0x00, 0x31, 0x00, 0x32, 0x00, 0x33, 0x00, 0x34, 0x00, 0x35, 0x00, 0x36, 0x00, 0x37, 0x00, + 0x38, 0x00, 0x39, 0x00, 0x3A, 0x00, 0x3B, 0x00, 0x3C, 0x00, 0x3D, 0x00, 0x3E, 0x00, 0x3F, 0x00, + 0x40, 0x00, 0x41, 0x00, 0x42, 0x00, 0x43, 0x00, 0x44, 0x00, 0x45, 0x00, 0x46, 0x00, 0x47, 0x00, + 0x48, 0x00, 0x49, 0x00, 0x4A, 0x00, 0x4B, 0x00, 0x4C, 0x00, 0x4D, 0x00, 0x4E, 0x00, 0x4F, 0x00, + 0x50, 0x00, 0x51, 0x00, 0x52, 0x00, 0x53, 0x00, 0x54, 0x00, 0x55, 0x00, 0x56, 0x00, 0x57, 0x00, + 0x58, 0x00, 0x59, 0x00, 0x5A, 0x00, 0x5B, 0x00, 0x5C, 0x00, 0x5D, 0x00, 0x5E, 0x00, 0x5F, 0x00, + 0x60, 0x00, 0x41, 0x00, 0x42, 0x00, 0x43, 0x00, 0x44, 0x00, 0x45, 0x00, 0x46, 0x00, 0x47, 0x00, + 0x48, 0x00, 0x49, 0x00, 0x4A, 0x00, 0x4B, 0x00, 0x4C, 0x00, 0x4D, 0x00, 0x4E, 0x00, 0x4F, 0x00, + 0x50, 0x00, 0x51, 0x00, 0x52, 0x00, 0x53, 0x00, 0x54, 0x00, 0x55, 0x00, 0x56, 0x00, 0x57, 0x00, + 0x58, 0x00, 0x59, 0x00, 0x5A, 0x00, 0x7B, 0x00, 0x7C, 0x00, 0x7D, 0x00, 0x7E, 0x00, 0x7F, 0x00, + 0x80, 0x00, 0x81, 0x00, 0x82, 0x00, 0x83, 0x00, 0x84, 0x00, 0x85, 0x00, 0x86, 0x00, 0x87, 0x00, + 0x88, 0x00, 0x89, 0x00, 0x8A, 0x00, 0x8B, 0x00, 0x8C, 0x00, 0x8D, 0x00, 0x8E, 0x00, 0x8F, 0x00, + 0x90, 0x00, 0x91, 0x00, 0x92, 0x00, 0x93, 0x00, 0x94, 0x00, 0x95, 0x00, 0x96, 0x00, 0x97, 0x00, + 0x98, 0x00, 0x99, 0x00, 0x9A, 0x00, 0x9B, 0x00, 0x9C, 0x00, 0x9D, 0x00, 0x9E, 0x00, 0x9F, 0x00, + 0xA0, 0x00, 0xA1, 0x00, 0xA2, 0x00, 0xA3, 0x00, 0xA4, 0x00, 0xA5, 0x00, 0xA6, 0x00, 0xA7, 0x00, + 0xA8, 0x00, 0xA9, 0x00, 0xAA, 0x00, 0xAB, 0x00, 0xAC, 0x00, 0xAD, 0x00, 0xAE, 0x00, 0xAF, 0x00, + 0xB0, 0x00, 0xB1, 0x00, 0xB2, 0x00, 0xB3, 0x00, 0xB4, 0x00, 0xB5, 0x00, 0xB6, 0x00, 0xB7, 0x00, + 0xB8, 0x00, 0xB9, 0x00, 0xBA, 0x00, 0xBB, 0x00, 0xBC, 0x00, 0xBD, 0x00, 0xBE, 0x00, 0xBF, 0x00, + 0xC0, 0x00, 0xC1, 0x00, 0xC2, 0x00, 0xC3, 0x00, 0xC4, 0x00, 0xC5, 0x00, 0xC6, 0x00, 0xC7, 0x00, + 0xC8, 0x00, 0xC9, 0x00, 0xCA, 0x00, 0xCB, 0x00, 0xCC, 0x00, 0xCD, 0x00, 0xCE, 0x00, 0xCF, 0x00, + 0xD0, 0x00, 0xD1, 0x00, 0xD2, 0x00, 0xD3, 0x00, 0xD4, 0x00, 0xD5, 0x00, 0xD6, 0x00, 0xD7, 0x00, + 0xD8, 0x00, 0xD9, 0x00, 0xDA, 0x00, 0xDB, 0x00, 0xDC, 0x00, 0xDD, 0x00, 0xDE, 0x00, 0xDF, 0x00, + 0xC0, 0x00, 0xC1, 0x00, 0xC2, 0x00, 0xC3, 0x00, 0xC4, 0x00, 0xC5, 0x00, 0xC6, 0x00, 0xC7, 0x00, + 0xC8, 0x00, 0xC9, 0x00, 0xCA, 0x00, 0xCB, 0x00, 0xCC, 0x00, 0xCD, 0x00, 0xCE, 0x00, 0xCF, 0x00, + 0xD0, 0x00, 0xD1, 0x00, 0xD2, 0x00, 0xD3, 0x00, 0xD4, 0x00, 0xD5, 0x00, 0xD6, 0x00, 0xF7, 0x00, + 0xD8, 0x00, 0xD9, 0x00, 0xDA, 0x00, 0xDB, 0x00, 0xDC, 0x00, 0xDD, 0x00, 0xDE, 0x00, 0x78, 0x01, + 0x00, 0x01, 0x00, 0x01, 0x02, 0x01, 0x02, 0x01, 0x04, 0x01, 0x04, 0x01, 0x06, 0x01, 0x06, 0x01, + 0x08, 0x01, 0x08, 0x01, 0x0A, 0x01, 0x0A, 0x01, 0x0C, 0x01, 0x0C, 0x01, 0x0E, 0x01, 0x0E, 0x01, + 0x10, 0x01, 0x10, 0x01, 0x12, 0x01, 0x12, 0x01, 0x14, 0x01, 0x14, 0x01, 0x16, 0x01, 0x16, 0x01, + 0x18, 0x01, 0x18, 0x01, 0x1A, 0x01, 0x1A, 0x01, 0x1C, 0x01, 0x1C, 0x01, 0x1E, 0x01, 0x1E, 0x01, + 0x20, 0x01, 0x20, 0x01, 0x22, 0x01, 0x22, 0x01, 0x24, 0x01, 0x24, 0x01, 0x26, 0x01, 0x26, 0x01, + 0x28, 0x01, 0x28, 0x01, 0x2A, 0x01, 0x2A, 0x01, 0x2C, 0x01, 0x2C, 0x01, 0x2E, 0x01, 0x2E, 0x01, + 0x30, 0x01, 0x31, 0x01, 0x32, 0x01, 0x32, 0x01, 0x34, 0x01, 0x34, 0x01, 0x36, 0x01, 0x36, 0x01, + 0x38, 0x01, 0x39, 0x01, 0x39, 0x01, 0x3B, 0x01, 0x3B, 0x01, 0x3D, 0x01, 0x3D, 0x01, 0x3F, 0x01, + 0x3F, 0x01, 0x41, 0x01, 0x41, 0x01, 0x43, 0x01, 0x43, 0x01, 0x45, 0x01, 0x45, 0x01, 0x47, 0x01, + 0x47, 0x01, 0x49, 0x01, 0x4A, 0x01, 0x4A, 0x01, 0x4C, 0x01, 0x4C, 0x01, 0x4E, 0x01, 0x4E, 0x01, + 0x50, 0x01, 0x50, 0x01, 0x52, 0x01, 0x52, 0x01, 0x54, 0x01, 0x54, 0x01, 0x56, 0x01, 0x56, 0x01, + 0x58, 0x01, 0x58, 0x01, 0x5A, 0x01, 0x5A, 0x01, 0x5C, 0x01, 0x5C, 0x01, 0x5E, 0x01, 0x5E, 0x01, + 0x60, 0x01, 0x60, 0x01, 0x62, 0x01, 0x62, 0x01, 0x64, 0x01, 0x64, 0x01, 0x66, 0x01, 0x66, 0x01, + 0x68, 0x01, 0x68, 0x01, 0x6A, 0x01, 0x6A, 0x01, 0x6C, 0x01, 0x6C, 0x01, 0x6E, 0x01, 0x6E, 0x01, + 0x70, 0x01, 0x70, 0x01, 0x72, 0x01, 0x72, 0x01, 0x74, 0x01, 0x74, 0x01, 0x76, 0x01, 0x76, 0x01, + 0x78, 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0xF1, 0xFF, + 0xF2, 0xFF, 0xF3, 0xFF, 0xF4, 0xFF, 0xF5, 0xFF, 0xF6, 0xFF, 0xF7, 0xFF, 0xF8, 0xFF, 0xF9, 0xFF, + 0xFA, 0xFF, 0xFB, 0xFF, 0xFC, 0xFF, 0xFD, 0xFF, 0xFE, 0xFF, 0xFF, 0xFF +}; diff --git a/drivers/staging/exfat/exfat_version.h b/drivers/staging/exfat/exfat_version.h new file mode 100644 index 0000000..ab6ce18 --- /dev/null +++ b/drivers/staging/exfat/exfat_version.h @@ -0,0 +1 @@ +#define EXFAT_VERSION "1.2.4" -- 1.8.1.2 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
