Changes from V3
o remove CP_LARGE_VOL_FLAG instead, use cp_payload in superblock
because disk size is determined at format
Changes from V2
o fix conversion like le32_to_cpu
o use is_set_ckpt_flags instead of bit operation
o check return value after memory allocation
Changes from V1
o fix orphan node blkaddr for large volume
-- >8 --
>From b1610f32c472cb11f025e0997b7633d5c45b87e9 Mon Sep 17 00:00:00 2001
From: Changman Lee <cm224.lee@xxxxxxxxxxx>
Date: Mon, 12 May 2014 12:27:43 +0900
Subject: [PATCH] f2fs: large volume support
f2fs's cp has one page which consists of struct f2fs_checkpoint and
version bitmap of sit and nat. To support lots of segments, we need more
blocks for sit bitmap. So let's arrange sit bitmap as following:
+-----------------+------------+
| f2fs_checkpoint | sit bitmap |
| + nat bitmap | |
+-----------------+------------+
0 4k N blocks
Signed-off-by: Changman Lee <cm224.lee@xxxxxxxxxxx>
---
fs/f2fs/checkpoint.c | 45 ++++++++++++++++++++++++++++++++++++++++-----
fs/f2fs/f2fs.h | 13 +++++++++++--
include/linux/f2fs_fs.h | 2 ++
3 files changed, 53 insertions(+), 7 deletions(-)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index fe968c7..c559946 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -371,7 +371,9 @@ void recover_orphan_inodes(struct f2fs_sb_info *sbi)
return;
sbi->por_doing = true;
- start_blk = __start_cp_addr(sbi) + 1;
+
+ start_blk = __start_cp_addr(sbi) + 1 +
+ le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
orphan_blkaddr = __start_sum_addr(sbi) - 1;
ra_meta_pages(sbi, start_blk, orphan_blkaddr, META_CP);
@@ -512,8 +514,9 @@ int get_valid_checkpoint(struct f2fs_sb_info *sbi)
unsigned long blk_size = sbi->blocksize;
unsigned long long cp1_version = 0, cp2_version = 0;
unsigned long long cp_start_blk_no;
+ unsigned int cp_blks = 1 + le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
- sbi->ckpt = kzalloc(blk_size, GFP_KERNEL);
+ sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
if (!sbi->ckpt)
return -ENOMEM;
/*
@@ -544,6 +547,25 @@ int get_valid_checkpoint(struct f2fs_sb_info *sbi)
cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
memcpy(sbi->ckpt, cp_block, blk_size);
+ if (cp_blks > 1) {
+ int i;
+ block_t cp_blk_no;
+
+ cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
+ if (cur_page == cp2)
+ cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
+
+ for (i = 1; i < cp_blks; i++) {
+ void *sit_bitmap_ptr;
+ unsigned char *ckpt = (unsigned char *)sbi->ckpt;
+
+ cur_page = get_meta_page(sbi, cp_blk_no + i);
+ sit_bitmap_ptr = page_address(cur_page);
+ memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
+ f2fs_put_page(cur_page, 1);
+ }
+ }
+
f2fs_put_page(cp1, 1);
f2fs_put_page(cp2, 1);
return 0;
@@ -736,6 +758,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
__u32 crc32 = 0;
void *kaddr;
int i;
+ int cp_payload_blks = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
/*
* This avoids to conduct wrong roll-forward operations and uses
@@ -786,16 +809,19 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
orphan_blocks = (sbi->n_orphans + F2FS_ORPHANS_PER_BLOCK - 1)
/ F2FS_ORPHANS_PER_BLOCK;
- ckpt->cp_pack_start_sum = cpu_to_le32(1 + orphan_blocks);
+ ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
+ orphan_blocks);
if (is_umount) {
set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
ckpt->cp_pack_total_block_count = cpu_to_le32(2 +
- data_sum_blocks + orphan_blocks + NR_CURSEG_NODE_TYPE);
+ cp_payload_blks + data_sum_blocks +
+ orphan_blocks + NR_CURSEG_NODE_TYPE);
} else {
clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
ckpt->cp_pack_total_block_count = cpu_to_le32(2 +
- data_sum_blocks + orphan_blocks);
+ cp_payload_blks + data_sum_blocks +
+ orphan_blocks);
}
if (sbi->n_orphans)
@@ -821,6 +847,15 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
set_page_dirty(cp_page);
f2fs_put_page(cp_page, 1);
+ for (i = 1; i < 1 + cp_payload_blks; i++) {
+ cp_page = grab_meta_page(sbi, start_blk++);
+ kaddr = page_address(cp_page);
+ memcpy(kaddr, (char *)ckpt + i * F2FS_BLKSIZE,
+ (1 << sbi->log_blocksize));
+ set_page_dirty(cp_page);
+ f2fs_put_page(cp_page, 1);
+ }
+
if (sbi->n_orphans) {
write_orphan_inodes(sbi, start_blk);
start_blk += orphan_blocks;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 676a2c6..9684b1f 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -764,9 +764,18 @@ static inline unsigned long __bitmap_size(struct f2fs_sb_info *sbi, int flag)
static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
{
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
- int offset = (flag == NAT_BITMAP) ?
+ int offset;
+
+ if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload) > 0) {
+ if (flag == NAT_BITMAP)
+ return &ckpt->sit_nat_version_bitmap;
+ else
+ return ((unsigned char *)ckpt + F2FS_BLKSIZE);
+ } else {
+ offset = (flag == NAT_BITMAP) ?
le32_to_cpu(ckpt->sit_ver_bitmap_bytesize) : 0;
- return &ckpt->sit_nat_version_bitmap + offset;
+ return &ckpt->sit_nat_version_bitmap + offset;
+ }
}
static inline block_t __start_cp_addr(struct f2fs_sb_info *sbi)
diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index 8c03f71..23ba0b5 100644
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -19,6 +19,7 @@
#define F2FS_LOG_SECTORS_PER_BLOCK 3 /* 4KB: F2FS_BLKSIZE */
#define F2FS_BLKSIZE 4096 /* support only 4KB block */
#define F2FS_MAX_EXTENSION 64 /* # of extension entries */
+#define F2FS_BLK_ALIGN(x) (((x) + F2FS_BLKSIZE - 1) / F2FS_BLKSIZE)
#define NULL_ADDR ((block_t)0) /* used as block_t addresses */
#define NEW_ADDR ((block_t)-1) /* used as block_t addresses */
@@ -75,6 +76,7 @@ struct f2fs_super_block {
__le16 volume_name[512]; /* volume name */
__le32 extension_count; /* # of extensions below */
__u8 extension_list[F2FS_MAX_EXTENSION][8]; /* extension array */
+ __le32 cp_payload;
} __packed;
/*
--
1.7.10.4
--
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