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| author | Miao Xie <miaox@cn.fujitsu.com> | 2011-09-11 10:52:24 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-09-11 10:52:24 -0400 |
| commit | 0c1a98c81413e00a6c379d898e06a09350d31926 (patch) | |
| tree | 6f92bcd7954fc8131197ccca25b94a3a88dbb368 /fs/eventpoll.c | |
| parent | 5b397377e97d436fc2ed872fc53f85395bb984e0 (diff) | |
| download | blackbird-op-linux-0c1a98c81413e00a6c379d898e06a09350d31926.tar.gz blackbird-op-linux-0c1a98c81413e00a6c379d898e06a09350d31926.zip | |
Btrfs: fix the file extent gap when doing direct IO
When we write some data to the place that is beyond the end of the file
in direct I/O mode, a data hole will be created. And Btrfs should insert
a file extent item that point to this hole into the fs tree. But unfortunately
Btrfs forgets doing it.
The following is a simple way to reproduce it:
# mkfs.btrfs /dev/sdc2
# mount /dev/sdc2 /test4
# touch /test4/a
# dd if=/dev/zero of=/test4/a seek=8 count=1 bs=4K oflag=direct conv=nocreat,notrunc
# umount /test4
# btrfsck /dev/sdc2
root 5 inode 257 errors 100
Reported-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Tested-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/eventpoll.c')
0 files changed, 0 insertions, 0 deletions
