This adds support for detecting Flash-Friendly File System (f2fs) to libblkid. Based on work by Sven-Göran Bergh at http://www.mail-archive.com/busybox@xxxxxxxxxxx/msg17874.html Signed-off-by: Alejandro Martinez Ruiz <alex@xxxxxxxxxxxxxxxx> --- libblkid/src/Makemodule.am | 1 + libblkid/src/superblocks/f2fs.c | 98 ++++++++++++++++++++++++++++++++++ libblkid/src/superblocks/superblocks.c | 3 +- libblkid/src/superblocks/superblocks.h | 1 + 4 files changed, 102 insertions(+), 1 deletion(-) create mode 100644 libblkid/src/superblocks/f2fs.c diff --git a/libblkid/src/Makemodule.am b/libblkid/src/Makemodule.am index de60458..90efa3d 100644 --- a/libblkid/src/Makemodule.am +++ b/libblkid/src/Makemodule.am @@ -54,6 +54,7 @@ libblkid_la_SOURCES = \ libblkid/src/superblocks/drbdproxy_datalog.c \ libblkid/src/superblocks/exfat.c \ libblkid/src/superblocks/ext.c \ + libblkid/src/superblocks/f2fs.c \ libblkid/src/superblocks/gfs.c \ libblkid/src/superblocks/hfs.c \ libblkid/src/superblocks/highpoint_raid.c \ diff --git a/libblkid/src/superblocks/f2fs.c b/libblkid/src/superblocks/f2fs.c new file mode 100644 index 0000000..ad03441 --- /dev/null +++ b/libblkid/src/superblocks/f2fs.c @@ -0,0 +1,98 @@ +/* + * Copyright (C) 2013 Alejandro Martinez Ruiz <alex@xxxxxxxxxxxxxxxx> + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License + */ + +#include <stddef.h> +#include <string.h> + +#include "superblocks.h" + +#define F2FS_MAGIC "\x10\x20\xF5\xF2" +#define F2FS_MAGIC_OFF 0 +#define F2FS_UUID_SIZE 16 +#define F2FS_LABEL_SIZE 512 +#define F2FS_SB1_OFF 0x400 +#define F2FS_SB1_KBOFF (F2FS_SB1_OFF >> 10) +#define F2FS_SB2_OFF 0x1400 +#define F2FS_SB2_KBOFF (F2FS_SB2_OFF >> 10) + +struct f2fs_super_block { /* According to version 1.1 */ +/* 0x00 */ uint32_t magic; /* Magic Number */ +/* 0x04 */ uint16_t major_ver; /* Major Version */ +/* 0x06 */ uint16_t minor_ver; /* Minor Version */ +/* 0x08 */ uint32_t log_sectorsize; /* log2 sector size in bytes */ +/* 0x0C */ uint32_t log_sectors_per_block; /* log2 # of sectors per block */ +/* 0x10 */ uint32_t log_blocksize; /* log2 block size in bytes */ +/* 0x14 */ uint32_t log_blocks_per_seg; /* log2 # of blocks per segment */ +/* 0x18 */ uint32_t segs_per_sec; /* # of segments per section */ +/* 0x1C */ uint32_t secs_per_zone; /* # of sections per zone */ +/* 0x20 */ uint32_t checksum_offset; /* checksum offset inside super block */ +/* 0x24 */ uint64_t block_count; /* total # of user blocks */ +/* 0x2C */ uint32_t section_count; /* total # of sections */ +/* 0x30 */ uint32_t segment_count; /* total # of segments */ +/* 0x34 */ uint32_t segment_count_ckpt; /* # of segments for checkpoint */ +/* 0x38 */ uint32_t segment_count_sit; /* # of segments for SIT */ +/* 0x3C */ uint32_t segment_count_nat; /* # of segments for NAT */ +/* 0x40 */ uint32_t segment_count_ssa; /* # of segments for SSA */ +/* 0x44 */ uint32_t segment_count_main; /* # of segments for main area */ +/* 0x48 */ uint32_t segment0_blkaddr; /* start block address of segment 0 */ +/* 0x4C */ uint32_t cp_blkaddr; /* start block address of checkpoint */ +/* 0x50 */ uint32_t sit_blkaddr; /* start block address of SIT */ +/* 0x54 */ uint32_t nat_blkaddr; /* start block address of NAT */ +/* 0x58 */ uint32_t ssa_blkaddr; /* start block address of SSA */ +/* 0x5C */ uint32_t main_blkaddr; /* start block address of main area */ +/* 0x60 */ uint32_t root_ino; /* root inode number */ +/* 0x64 */ uint32_t node_ino; /* node inode number */ +/* 0x68 */ uint32_t meta_ino; /* meta inode number */ +/* 0x6C */ uint8_t uuid[F2FS_UUID_SIZE]; /* 128-bit uuid for volume */ +/* 0x7C */ uint16_t volume_name[F2FS_LABEL_SIZE]; /* volume name */ +#if 0 +/* 0x47C */ uint32_t extension_count; /* # of extensions below */ +/* 0x480 */ uint8_t extension_list[64][8]; /* extension array */ +#endif +} __attribute__((packed)); + +static int probe_f2fs(blkid_probe pr, const struct blkid_idmag *mag) +{ + struct f2fs_super_block *sb; + uint16_t major, minor; + + sb = blkid_probe_get_sb(pr, mag, struct f2fs_super_block); + if (!sb) + return -1; + + major = le16_to_cpu(sb->major_ver); + minor = le16_to_cpu(sb->minor_ver); + + /* For version 1.0 we cannot know the correct sb structure */ + if (major == 1 && minor == 0) + return 0; + + if (*((unsigned char *) sb->volume_name)) + blkid_probe_set_utf8label(pr, (unsigned char *) sb->volume_name, + sizeof(sb->volume_name), + BLKID_ENC_UTF16LE); + + blkid_probe_set_uuid(pr, sb->uuid); + blkid_probe_sprintf_version(pr, "%u.%u", major, minor); +} + +const struct blkid_idinfo f2fs_idinfo = +{ + .name = "f2fs", + .usage = BLKID_USAGE_FILESYSTEM, + .probefunc = probe_f2fs, + .magics = + { + { + .magic = F2FS_MAGIC, + .len = 4, + .kboff = F2FS_SB1_KBOFF, + .sboff = F2FS_MAGIC_OFF + }, + { NULL } + } +}; diff --git a/libblkid/src/superblocks/superblocks.c b/libblkid/src/superblocks/superblocks.c index 2929a5f..62aa662 100644 --- a/libblkid/src/superblocks/superblocks.c +++ b/libblkid/src/superblocks/superblocks.c @@ -140,7 +140,8 @@ static const struct blkid_idinfo *idinfos[] = &vmfs_fs_idinfo, &befs_idinfo, &nilfs2_idinfo, - &exfat_idinfo + &exfat_idinfo, + &f2fs_idinfo }; /* diff --git a/libblkid/src/superblocks/superblocks.h b/libblkid/src/superblocks/superblocks.h index 08f1438..887732a 100644 --- a/libblkid/src/superblocks/superblocks.h +++ b/libblkid/src/superblocks/superblocks.h @@ -69,6 +69,7 @@ extern const struct blkid_idinfo drbdproxy_datalog_idinfo; extern const struct blkid_idinfo befs_idinfo; extern const struct blkid_idinfo nilfs2_idinfo; extern const struct blkid_idinfo exfat_idinfo; +extern const struct blkid_idinfo f2fs_idinfo; /* * superblock functions -- 1.8.1.2.422.g08c0e7f -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
