From: Yongpeng Yang <[email protected]>
When `fileinfo->fi_flags` does not have the `FIEMAP_FLAG_SYNC` bit set
and inline data has not been persisted yet, the physical address of the
extent is calculated incorrectly for unwritten inline inodes.
root@vm:/mnt/f2fs# dd if=/dev/zero of=data.3k bs=3k count=1
root@vm:/mnt/f2fs# f2fs_io fiemap 0 100 data.3k
Fiemap: offset = 0 len = 100
logical addr. physical addr. length flags
0 0000000000000000 00000ffffffff16c 0000000000000c00 00000301
This patch fixes the issue by checking if the inode's address is valid.
If the inline inode is unwritten, set the physical address to 0 and
mark the extent with `FIEMAP_EXTENT_UNKNOWN | FIEMAP_EXTENT_DELALLOC`
flags.
Fixes: 67f8cf3cee6f ("f2fs: support fiemap for inline_data")
Signed-off-by: Yongpeng Yang <[email protected]>
---
fs/f2fs/inline.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 0a1052d5ee62..86d2abbb40ff 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -792,7 +792,7 @@ int f2fs_read_inline_dir(struct file *file, struct
dir_context *ctx,
int f2fs_inline_data_fiemap(struct inode *inode,
struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
{
- __u64 byteaddr, ilen;
+ __u64 byteaddr = 0, ilen;
__u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
FIEMAP_EXTENT_LAST;
struct node_info ni;
@@ -825,9 +825,14 @@ int f2fs_inline_data_fiemap(struct inode *inode,
if (err)
goto out;
- byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
- byteaddr += (char *)inline_data_addr(inode, ifolio) -
- (char *)F2FS_INODE(ifolio);
+ if (__is_valid_data_blkaddr(ni.blk_addr)) {
+ byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
+ byteaddr += (char *)inline_data_addr(inode, ifolio) -
+ (char *)F2FS_INODE(ifolio);
+ } else {
+ f2fs_bug_on(F2FS_I_SB(inode), ni.blk_addr != NEW_ADDR);
+ flags |= FIEMAP_EXTENT_DELALLOC | FIEMAP_EXTENT_UNKNOWN;
+ }
err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
trace_f2fs_fiemap(inode, start, byteaddr, ilen, flags, err);
out:
--
2.43.0
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