Commit 5d1f4020 authored Jan 30, 2013 by Josef Bacik

Btrfs: fix missing i_size update

If we have an ordered extent before the ordered extent we are currently
completing that is after the current disk_i_size we will put our i_size
update into that ordered extent so that we do not expose stale data. The
problem is that if our disk i_size is updated past the previous ordered
extent we won't update the i_size with the pending i_size update. So check
the pending i_size update and if its above the current disk i_size we need
to go ahead and try to update. Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>

parent 6f1c3605

fs/btrfs/ordered-data.c

+9 −2

Original line number	Diff line number	Diff line
		@@ -836,9 +836,16 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
		* if the disk i_size is already at the inode->i_size, or
		* this ordered extent is inside the disk i_size, we're done
		*/
		if (disk_i_size == i_size \|\| offset <= disk_i_size) {
		if (disk_i_size == i_size)
		goto out;

		/*
		* We still need to update disk_i_size if outstanding_isize is greater
		* than disk_i_size.
		*/
		if (offset <= disk_i_size &&
		(!ordered \|\| ordered->outstanding_isize <= disk_i_size))
		goto out;
		}

		/*
		* walk backward from this ordered extent to disk_i_size.