This is a note to let you know that I've just added the patch titled
f2fs: fix to adjust appropriate length for fiemap
to the 6.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
f2fs-fix-to-adjust-appropriate-length-for-fiemap.patch
and it can be found in the queue-6.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 81e2825b514f3afa828b9682bda351ebc4a2bc06
Author: Zhiguo Niu <zhiguo.niu@xxxxxxxxxx>
Date: Fri Nov 8 09:25:56 2024 +0800
f2fs: fix to adjust appropriate length for fiemap
[ Upstream commit 77569f785c8624fa4189795fb52e635a973672e5 ]
If user give a file size as "length" parameter for fiemap
operations, but if this size is non-block size aligned,
it will show 2 segments fiemap results even this whole file
is contiguous on disk, such as the following results:
./f2fs_io fiemap 0 19034 ylog/analyzer.py
Fiemap: offset = 0 len = 19034
logical addr. physical addr. length flags
0 0000000000000000 0000000020baa000 0000000000004000 00001000
1 0000000000004000 0000000020bae000 0000000000001000 00001001
after this patch:
./f2fs_io fiemap 0 19034 ylog/analyzer.py
Fiemap: offset = 0 len = 19034
logical addr. physical addr. length flags
0 0000000000000000 00000000315f3000 0000000000005000 00001001
Signed-off-by: Zhiguo Niu <zhiguo.niu@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Stable-dep-of: 6787a8224585 ("f2fs: fix to requery extent which cross boundary of inquiry")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 0f9728e0d5631..a126fecc808c4 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1938,12 +1938,12 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
goto out;
}
- if (F2FS_BYTES_TO_BLK(len) == 0)
- len = F2FS_BLKSIZE;
-
start_blk = F2FS_BYTES_TO_BLK(start);
last_blk = F2FS_BYTES_TO_BLK(start + len - 1);
+ if (len & F2FS_BLKSIZE_MASK)
+ len = round_up(len, F2FS_BLKSIZE);
+
next:
memset(&map, 0, sizeof(map));
map.m_lblk = start_blk;
diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index 3b2ad444c002e..c24f8bc01045d 100644
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -24,6 +24,7 @@
#define NEW_ADDR ((block_t)-1) /* used as block_t addresses */
#define COMPRESS_ADDR ((block_t)-2) /* used as compressed data flag */
+#define F2FS_BLKSIZE_MASK (F2FS_BLKSIZE - 1)
#define F2FS_BYTES_TO_BLK(bytes) ((unsigned long long)(bytes) >> F2FS_BLKSIZE_BITS)
#define F2FS_BLK_TO_BYTES(blk) ((unsigned long long)(blk) << F2FS_BLKSIZE_BITS)
#define F2FS_BLK_END_BYTES(blk) (F2FS_BLK_TO_BYTES(blk + 1) - 1)
