korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-28 06:34:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

f2fs: avoid unused block when dio write in LFS mode

Browse Source 
This patch addresses the problem that when using LFS mode, unused blocks
may occur in f2fs_map_blocks() during block allocation for dio writes.

If a new section is allocated during block allocation, it will not be
included in the map struct by map_is_mergeable() if the LBA of the
allocated block is not contiguous. However, the block already allocated
in this process will remain unused due to the LFS mode.

This patch avoids the possibility of unused blocks by escaping
f2fs_map_blocks() when allocating the last block in a section.

Signed-off-by: Daejun Park <daejun7.park@samsung.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Daejun Park 2024-09-05 14:24:33 +09:00 committed by Jaegeuk Kim
parent bfe5c02654
commit 0638a3197c
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/f2fs/data.c
View File

@ -1712,6 +1712,14 @@ skip:
dn.ofs_in_node = end_offset;
}
if (flag == F2FS_GET_BLOCK_DIO && f2fs_lfs_mode(sbi) &&
map->m_may_create) {
/* the next block to be allocated may not be contiguous. */
if (GET_SEGOFF_FROM_SEG0(sbi, blkaddr) % BLKS_PER_SEC(sbi) ==
CAP_BLKS_PER_SEC(sbi) - 1)
goto sync_out;
}
if (pgofs >= end)
goto sync_out;
else if (dn.ofs_in_node < end_offset)