| From david@fromorbit.com Fri Apr 2 11:07:09 2010 |
| From: Christoph Hellwig <hch@infradead.org> |
| Date: Fri, 12 Mar 2010 09:42:04 +1100 |
| Subject: xfs: check for not fully initialized inodes in xfs_ireclaim |
| To: stable@kernel.org |
| Cc: xfs@oss.sgi.com |
| Message-ID: <1268347337-7160-7-git-send-email-david@fromorbit.com> |
| |
| |
| From: Christoph Hellwig <hch@infradead.org> |
| |
| commit b44b1126279b60597f96bbe77507b1650f88a969 upstream |
| |
| Add an assert for inodes not added to the inode cache in xfs_ireclaim, |
| to make sure we're not going to introduce something like the |
| famous nfsd inode cache bug again. |
| |
| Signed-off-by: Christoph Hellwig <hch@lst.de> |
| Signed-off-by: Alex Elder <aelder@sgi.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
| --- |
| fs/xfs/xfs_iget.c | 12 ++++++++---- |
| 1 file changed, 8 insertions(+), 4 deletions(-) |
| |
| --- a/fs/xfs/xfs_iget.c |
| +++ b/fs/xfs/xfs_iget.c |
| @@ -511,17 +511,21 @@ xfs_ireclaim( |
| { |
| struct xfs_mount *mp = ip->i_mount; |
| struct xfs_perag *pag; |
| + xfs_agino_t agino = XFS_INO_TO_AGINO(mp, ip->i_ino); |
| |
| XFS_STATS_INC(xs_ig_reclaims); |
| |
| /* |
| - * Remove the inode from the per-AG radix tree. It doesn't matter |
| - * if it was never added to it because radix_tree_delete can deal |
| - * with that case just fine. |
| + * Remove the inode from the per-AG radix tree. |
| + * |
| + * Because radix_tree_delete won't complain even if the item was never |
| + * added to the tree assert that it's been there before to catch |
| + * problems with the inode life time early on. |
| */ |
| pag = xfs_get_perag(mp, ip->i_ino); |
| write_lock(&pag->pag_ici_lock); |
| - radix_tree_delete(&pag->pag_ici_root, XFS_INO_TO_AGINO(mp, ip->i_ino)); |
| + if (!radix_tree_delete(&pag->pag_ici_root, agino)) |
| + ASSERT(0); |
| write_unlock(&pag->pag_ici_lock); |
| xfs_put_perag(mp, pag); |
| |