tree 40cd0fed705ec59dd3c909b96452bae1fc532796
parent 64ba9926759792cf7b95f823402e2781edd1b5d4
author Christoph Hellwig <hch@lst.de> 1267777281 +0100
committer Al Viro <viro@zeniv.linux.org.uk> 1267813510 -0500

make sure data is on disk before calling ->write_inode

Similar to the fsync issue fixed a while ago in commit
2daea67e966dc0c42067ebea015ddac6834cef88 we need to write for data to
actually hit the disk before writing out the metadata to guarantee
data integrity for filesystems that modify the inode in the data I/O
completion path.  Currently XFS and NFS handle this manually, and AFS
has a write_inode method that does nothing but waiting for data, while
others are possibly missing out on this.

Fortunately this change has a lot less impact than the fsync change
as none of the write_inode methods starts data writeout of any form
by itself.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>