From 854ff5caabb5974b7464b438aba0bc47f1b6cf34 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 16 Oct 2013 15:48:53 -0400 Subject: [PATCH] exportfs: BUG_ON in crazy corner case This would indicate a nasty bug in the dcache and has never triggered in the past 10 years as far as I know. Reviewed-by: Christoph Hellwig Signed-off-by: J. Bruce Fields Signed-off-by: Al Viro --- fs/exportfs/expfs.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c index c43fe9b39ff2..6d0a7fa9abb3 100644 --- a/fs/exportfs/expfs.c +++ b/fs/exportfs/expfs.c @@ -112,18 +112,14 @@ reconnect_path(struct vfsmount *mnt, struct dentry *target_dir, char *nbuf) while (target_dir->d_flags & DCACHE_DISCONNECTED && noprogress++ < 10) { struct dentry *pd = find_disconnected_root(target_dir); + BUG_ON(pd == mnt->mnt_sb->s_root); + if (!IS_ROOT(pd)) { /* must have found a connected parent - great */ spin_lock(&pd->d_lock); pd->d_flags &= ~DCACHE_DISCONNECTED; spin_unlock(&pd->d_lock); noprogress = 0; - } else if (pd == mnt->mnt_sb->s_root) { - printk(KERN_ERR "export: Eeek filesystem root is not connected, impossible\n"); - spin_lock(&pd->d_lock); - pd->d_flags &= ~DCACHE_DISCONNECTED; - spin_unlock(&pd->d_lock); - noprogress = 0; } else { /* * We have hit the top of a disconnected path, try to -- 2.20.1