diff options
author | Christoph Hellwig <hch@infradead.org> | 2010-02-15 09:44:49 +0000 |
---|---|---|
committer | Alex Elder <aelder@sgi.com> | 2010-03-01 16:34:45 -0600 |
commit | 66d834ea603d61bd90fedad90300ca91c5bba0a3 (patch) | |
tree | f73072b9d87bd71a0739f07e4d0e26f10c5d925a /fs/xfs/linux-2.6 | |
parent | fd3200bef7d66ed3924f72c79a465fb7ff85478a (diff) | |
download | op-kernel-dev-66d834ea603d61bd90fedad90300ca91c5bba0a3.zip op-kernel-dev-66d834ea603d61bd90fedad90300ca91c5bba0a3.tar.gz |
xfs: implement optimized fdatasync
Allow us to track the difference between timestamp and size updates
by using mark_inode_dirty from the I/O completion code, and checking
the VFS inode flags in xfs_file_fsync.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/linux-2.6')
-rw-r--r-- | fs/xfs/linux-2.6/xfs_aops.c | 4 | ||||
-rw-r--r-- | fs/xfs/linux-2.6/xfs_file.c | 23 | ||||
-rw-r--r-- | fs/xfs/linux-2.6/xfs_iops.c | 10 |
3 files changed, 24 insertions, 13 deletions
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c index 66abe36..ce369a8 100644 --- a/fs/xfs/linux-2.6/xfs_aops.c +++ b/fs/xfs/linux-2.6/xfs_aops.c @@ -187,7 +187,7 @@ xfs_setfilesize( isize = xfs_ioend_new_eof(ioend); if (isize) { ip->i_d.di_size = isize; - xfs_mark_inode_dirty_sync(ip); + xfs_mark_inode_dirty(ip); } xfs_iunlock(ip, XFS_ILOCK_EXCL); @@ -341,7 +341,7 @@ xfs_submit_ioend_bio( * but don't update the inode size until I/O completion. */ if (xfs_ioend_new_eof(ioend)) - xfs_mark_inode_dirty_sync(XFS_I(ioend->io_inode)); + xfs_mark_inode_dirty(XFS_I(ioend->io_inode)); submit_bio(wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC_PLUG : WRITE, bio); diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index 6c283b7..43f9554 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -97,16 +97,6 @@ xfs_iozero( return (-status); } -/* - * We ignore the datasync flag here because a datasync is effectively - * identical to an fsync. That is, datasync implies that we need to write - * only the metadata needed to be able to access the data that is written - * if we crash after the call completes. Hence if we are writing beyond - * EOF we have to log the inode size change as well, which makes it a - * full fsync. If we don't write beyond EOF, the inode core will be - * clean in memory and so we don't need to log the inode, just like - * fsync. - */ STATIC int xfs_file_fsync( struct file *file, @@ -139,7 +129,18 @@ xfs_file_fsync( */ xfs_ilock(ip, XFS_ILOCK_SHARED); - if (ip->i_update_core) { + /* + * First check if the VFS inode is marked dirty. All the dirtying + * of non-transactional updates no goes through mark_inode_dirty*, + * which allows us to distinguish beteeen pure timestamp updates + * and i_size updates which need to be caught for fdatasync. + * After that also theck for the dirty state in the XFS inode, which + * might gets cleared when the inode gets written out via the AIL + * or xfs_iflush_cluster. + */ + if (((dentry->d_inode->i_state & I_DIRTY_DATASYNC) || + ((dentry->d_inode->i_state & I_DIRTY_SYNC) && !datasync)) && + ip->i_update_core) { /* * Kick off a transaction to log the inode core to get the * updates. The sync transaction will also force the log. diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c index e8566bb..61a9960 100644 --- a/fs/xfs/linux-2.6/xfs_iops.c +++ b/fs/xfs/linux-2.6/xfs_iops.c @@ -91,6 +91,16 @@ xfs_mark_inode_dirty_sync( mark_inode_dirty_sync(inode); } +void +xfs_mark_inode_dirty( + xfs_inode_t *ip) +{ + struct inode *inode = VFS_I(ip); + + if (!(inode->i_state & (I_WILL_FREE|I_FREEING|I_CLEAR))) + mark_inode_dirty(inode); +} + /* * Change the requested timestamp in the given inode. * We don't lock across timestamp updates, and we don't log them but |