diff options
| author | Christoph Hellwig <hch@infradead.org> | 2010-03-01 11:30:31 +0000 |
|---|---|---|
| committer | Alex Elder <aelder@sgi.com> | 2010-03-01 19:14:36 -0600 |
| commit | f1f724e4b523d444c5a598d74505aefa3d6844d2 (patch) | |
| tree | 49408b17a42628b7a0fbc1d5bf163bb716e73545 /fs/xfs/linux-2.6/xfs_sync.c | |
| parent | a14a5ab58f9d783ec3a2a287320fab22e1764813 (diff) | |
xfs: fix locking for inode cache radix tree tag updates
The radix-tree code requires it's users to serialize tag updates
against other updates to the tree. While XFS protects tag updates
against each other it does not serialize them against updates of the
tree contents, which can lead to tag corruption. Fix the inode
cache to always take pag_ici_lock in exclusive mode when updating
radix tree tags.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Patrick Schreurs <patrick@news-service.com>
Tested-by: Patrick Schreurs <patrick@news-service.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/linux-2.6/xfs_sync.c')
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_sync.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c index a9f6d20aff4..f9fc154d9f7 100644 --- a/fs/xfs/linux-2.6/xfs_sync.c +++ b/fs/xfs/linux-2.6/xfs_sync.c @@ -688,12 +688,12 @@ xfs_inode_set_reclaim_tag( struct xfs_perag *pag; pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); - read_lock(&pag->pag_ici_lock); + write_lock(&pag->pag_ici_lock); spin_lock(&ip->i_flags_lock); __xfs_inode_set_reclaim_tag(pag, ip); __xfs_iflags_set(ip, XFS_IRECLAIMABLE); spin_unlock(&ip->i_flags_lock); - read_unlock(&pag->pag_ici_lock); + write_unlock(&pag->pag_ici_lock); xfs_perag_put(pag); } |