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xfs: check for not fully initialized inodes in xfs_ireclaim 

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>
This commit is contained in:
Christoph Hellwig 2009-12-01 18:12:29 +00:00 committed by Alex Elder
parent 5ac4d630eb
commit b44b112627
1 changed files with 8 additions and 4 deletions
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12
fs/xfs/xfs_iget.c
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@ -478,17 +478,21 @@ 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);