From: Xiuhong Wang xiuhong.wang@unisoc.com
[ Upstream commit 2f6d721e14b69d6e1251f69fa238b48e8374e25f ]
When a file only needs one direct_node, performing the following operations will cause the file to be unrepairable:
unisoc # ./f2fs_io compress test.apk unisoc #df -h | grep dm-48 /dev/block/dm-48 112G 112G 1.2M 100% /data
unisoc # ./f2fs_io release_cblocks test.apk 924 unisoc # df -h | grep dm-48 /dev/block/dm-48 112G 112G 4.8M 100% /data
unisoc # dd if=/dev/random of=file4 bs=1M count=3 3145728 bytes (3.0 M) copied, 0.025 s, 120 M/s unisoc # df -h | grep dm-48 /dev/block/dm-48 112G 112G 1.8M 100% /data
unisoc # ./f2fs_io reserve_cblocks test.apk F2FS_IOC_RESERVE_COMPRESS_BLOCKS failed: No space left on device
adb reboot unisoc # df -h | grep dm-48 /dev/block/dm-48 112G 112G 11M 100% /data unisoc # ./f2fs_io reserve_cblocks test.apk 0
This is because the file has only one direct_node. After returning to -ENOSPC, reserved_blocks += ret will not be executed. As a result, the reserved_blocks at this time is still 0, which is not the real number of reserved blocks. Therefore, fsck cannot be set to repair the file.
After this patch, the fsck flag will be set to fix this problem.
unisoc # df -h | grep dm-48 /dev/block/dm-48 112G 112G 1.8M 100% /data unisoc # ./f2fs_io reserve_cblocks test.apk F2FS_IOC_RESERVE_COMPRESS_BLOCKS failed: No space left on device
adb reboot then fsck will be executed unisoc # df -h | grep dm-48 /dev/block/dm-48 112G 112G 11M 100% /data unisoc # ./f2fs_io reserve_cblocks test.apk 924
Fixes: c75488fb4d82 ("f2fs: introduce F2FS_IOC_RESERVE_COMPRESS_BLOCKS") Signed-off-by: Xiuhong Wang xiuhong.wang@unisoc.com Signed-off-by: Zhiguo Niu zhiguo.niu@unisoc.com Reviewed-by: Chao Yu chao@kernel.org Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/f2fs/file.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index bab83ce4fe091..378ab6bd1b8d8 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -3532,10 +3532,10 @@ static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg) return ret; }
-static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count) +static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count, + unsigned int *reserved_blocks) { struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); - unsigned int reserved_blocks = 0; int cluster_size = F2FS_I(dn->inode)->i_cluster_size; block_t blkaddr; int i; @@ -3596,12 +3596,12 @@ static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
f2fs_i_compr_blocks_update(dn->inode, compr_blocks, true);
- reserved_blocks += reserved; + *reserved_blocks += reserved; next: count -= cluster_size; }
- return reserved_blocks; + return 0; }
static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) @@ -3662,7 +3662,7 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) count = min(end_offset - dn.ofs_in_node, last_idx - page_idx); count = round_up(count, F2FS_I(inode)->i_cluster_size);
- ret = reserve_compress_blocks(&dn, count); + ret = reserve_compress_blocks(&dn, count, &reserved_blocks);
f2fs_put_dnode(&dn);
@@ -3670,13 +3670,12 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) break;
page_idx += count; - reserved_blocks += ret; }
filemap_invalidate_unlock(inode->i_mapping); up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
- if (ret >= 0) { + if (!ret) { clear_inode_flag(inode, FI_COMPRESS_RELEASED); inode->i_ctime = current_time(inode); f2fs_mark_inode_dirty_sync(inode, true); @@ -3686,7 +3685,7 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg) out: mnt_drop_write_file(filp);
- if (ret >= 0) { + if (!ret) { ret = put_user(reserved_blocks, (u64 __user *)arg); } else if (reserved_blocks && atomic_read(&F2FS_I(inode)->i_compr_blocks)) {