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authorBob Peterson <rpeterso@redhat.com>2011-03-17 16:19:58 -0400
committerSteven Whitehouse <swhiteho@redhat.com>2011-04-18 15:23:50 +0100
commit44ad37d69b2cc421d5b5c7ad7fed16230685b092 (patch)
tree3632c63eef9e159947316f18d48054f082c0578e /fs/gfs2/dir.c
parent001e8e8df4283dd4ef7a0297c012fce364c05cf1 (diff)
GFS2: filesystem hang caused by incorrect lock order
This patch fixes a deadlock in GFS2 where two processes are trying to reclaim an unlinked dinode: One holds the inode glock and calls gfs2_lookup_by_inum trying to look up the inode, which it can't, due to I_FREEING. The other has set I_FREEING from vfs and is at the beginning of gfs2_delete_inode waiting for the glock, which is held by the first. The solution is to add a new non_block parameter to the gfs2_iget function that causes it to return -ENOENT if the inode is being freed. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/dir.c')
-rw-r--r--fs/gfs2/dir.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index 5c356d09c32..f789c5732b7 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -1506,7 +1506,7 @@ struct inode *gfs2_dir_search(struct inode *dir, const struct qstr *name)
inode = gfs2_inode_lookup(dir->i_sb,
be16_to_cpu(dent->de_type),
be64_to_cpu(dent->de_inum.no_addr),
- be64_to_cpu(dent->de_inum.no_formal_ino));
+ be64_to_cpu(dent->de_inum.no_formal_ino), 0);
brelse(bh);
return inode;
}