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f2fs: compress: fix to avoid inconsistence bewteen i_blocks and dnode 

[ Upstream commit 54607494875edd636aff3c21ace3ad9a7da758a9 ]

In reserve_compress_blocks(), we update blkaddrs of dnode in prior to
inc_valid_block_count(), it may cause inconsistent status bewteen
i_blocks and blkaddrs once inc_valid_block_count() fails.

To fix this issue, it needs to reverse their invoking order.

Fixes: c75488fb4d ("f2fs: introduce F2FS_IOC_RESERVE_COMPRESS_BLOCKS")
Reviewed-by: Daeho Jeong <daehojeong@google.com>
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chao Yu 2024-01-13 03:41:30 +08:00 committed by Sasha Levin
parent eb6d30bca0
commit bc1e39928c
4 changed files with 24 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/f2fs/data.c
View File

@ -1219,7 +1219,8 @@ int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
return -EPERM;
if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
err = inc_valid_block_count(sbi, dn->inode, &count, true);
if (unlikely(err))
return err;
trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
@ -1476,7 +1477,7 @@ static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
dn->data_blkaddr = f2fs_data_blkaddr(dn);
if (dn->data_blkaddr == NULL_ADDR) {
err = inc_valid_block_count(sbi, dn->inode, &count);
err = inc_valid_block_count(sbi, dn->inode, &count, true);
if (unlikely(err))
return err;
}

7
fs/f2fs/f2fs.h
View File

@ -2244,7 +2244,7 @@ static inline bool __allow_reserved_blocks(struct f2fs_sb_info *sbi,
static inline void f2fs_i_blocks_write(struct inode *, block_t, bool, bool);
static inline int inc_valid_block_count(struct f2fs_sb_info *sbi,
struct inode *inode, blkcnt_t *count)
struct inode *inode, blkcnt_t *count, bool partial)
{
blkcnt_t diff = 0, release = 0;
block_t avail_user_block_count;
@ -2284,6 +2284,11 @@ static inline int inc_valid_block_count(struct f2fs_sb_info *sbi,
avail_user_block_count = 0;
}
if (unlikely(sbi->total_valid_block_count > avail_user_block_count)) {
if (!partial) {
spin_unlock(&sbi->stat_lock);
goto enospc;
}
diff = sbi->total_valid_block_count - avail_user_block_count;
if (diff > *count)
diff = *count;

22
fs/f2fs/file.c
View File

@ -3609,15 +3609,17 @@ static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
blkcnt_t reserved;
int ret;
for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {
blkaddr = f2fs_data_blkaddr(dn);
for (i = 0; i < cluster_size; i++) {
blkaddr = data_blkaddr(dn->inode, dn->node_page,
dn->ofs_in_node + i);
if (i == 0) {
if (blkaddr == COMPRESS_ADDR)
continue;
if (blkaddr != COMPRESS_ADDR) {
dn->ofs_in_node += cluster_size;
goto next;
}
continue;
}
/*
* compressed cluster was not released due to it
@ -3629,8 +3631,6 @@ static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
compr_blocks++;
continue;
}
f2fs_set_data_blkaddr(dn, NEW_ADDR);
}
reserved = cluster_size - compr_blocks;
@ -3639,12 +3639,14 @@ static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
if (reserved == 1)
goto next;
ret = inc_valid_block_count(sbi, dn->inode, &reserved);
if (ret)
ret = inc_valid_block_count(sbi, dn->inode, &reserved, false);
if (unlikely(ret))
return ret;
if (reserved != cluster_size - compr_blocks)
return -ENOSPC;
for (i = 0; i < cluster_size; i++, dn->ofs_in_node++) {
if (f2fs_data_blkaddr(dn) == NULL_ADDR)
f2fs_set_data_blkaddr(dn, NEW_ADDR);
}
f2fs_i_compr_blocks_update(dn->inode, compr_blocks, true);

2
fs/f2fs/segment.c
View File

@ -248,7 +248,7 @@ retry:
} else {
blkcnt_t count = 1;
err = inc_valid_block_count(sbi, inode, &count);
err = inc_valid_block_count(sbi, inode, &count, true);
if (err) {
f2fs_put_dnode(&dn);
return err;