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authorZheng Liu <gnehzuil.liu@gmail.com>2012-06-30 19:12:57 -0400
committerTheodore Ts'o <tytso@mit.edu>2012-06-30 19:12:57 -0400
commitf4e95b3316c4daa43224753bb98f41456fef86c7 (patch)
tree29bce2b6f2dc86433f9615a1a6a8628840ad680d /fs/ext4/extents.c
parent1c8457cadc9cefe7ec920a2f3537ff1fe20f4061 (diff)
downloadop-kernel-dev-f4e95b3316c4daa43224753bb98f41456fef86c7.zip
op-kernel-dev-f4e95b3316c4daa43224753bb98f41456fef86c7.tar.gz
ext4: honor O_(D)SYNC semantic in ext4_fallocate()
Ext4 must make sure the transaction to be commited to the disk when user opens a file with O_(D)SYNC flag and do a fallocate(2) call. This problem had been reported by Christoph Hellwig in this thread: http://www.spinics.net/lists/linux-btrfs/msg13621.html Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/extents.c')
-rw-r--r--fs/ext4/extents.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 91341ec..f1089cb 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4420,6 +4420,8 @@ retry:
ext4_falloc_update_inode(inode, mode, new_size,
(map.m_flags & EXT4_MAP_NEW));
ext4_mark_inode_dirty(handle, inode);
+ if ((file->f_flags & O_SYNC) && ret >= max_blocks)
+ ext4_handle_sync(handle);
ret2 = ext4_journal_stop(handle);
if (ret2)
break;
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