Commit 854ff5ca authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Al Viro

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: default avatarChristoph Hellwig <[email protected]>
Signed-off-by: default avatarJ. Bruce Fields <[email protected]>
Signed-off-by: default avatarAl Viro <[email protected]>
parent 13a2c3be
......@@ -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
......
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