dht: unlink stale linkfiles in rmdir to prevent ENOTEMPTY

Thanks to He Xaobing <allreol@gmail.com>, this patch is inspired by

http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=188#c2

Signed-off-by: Anand V. Avati <avati@blackhole.gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 188 ([ glusterfs 2.0.6rc2 ] - "Directory not empty" on rm -rf)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=188

1 files changed, 43 insertions, 3 deletions

diff --git a/xlators/cluster/dht/src/dht-helper.c b/xlators/cluster/dht/src/dht-helper.c
index 9816c1784..5a89ba584 100644
--- a/xlators/cluster/dht/src/dht-helper.c
+++ b/xlators/cluster/dht/src/dht-helper.c
@@ -139,7 +139,7 @@ dht_local_wipe (xlator_t *this, dht_local_t *local)
 		fd_unref (local->fd);
 		local->fd = NULL;
 	}
-	
+
 	if (local->xattr_req)
 		dict_unref (local->xattr_req);
 
@@ -184,6 +184,7 @@ basestr (const char *str)
         return basestr;
 }
 
+
 xlator_t *
 dht_first_up_subvol (xlator_t *this)
 {
@@ -192,7 +193,7 @@ dht_first_up_subvol (xlator_t *this)
 	int         i = 0;
 
 	conf = this->private;
-	
+
 	LOCK (&conf->subvolume_lock);
 	{
 		for (i = 0; i < conf->subvolume_cnt; i++) {
@@ -203,10 +204,11 @@ dht_first_up_subvol (xlator_t *this)
 		}
 	}
 	UNLOCK (&conf->subvolume_lock);
-	
+
 	return child;
 }
 
+
 xlator_t *
 dht_subvol_get_hashed (xlator_t *this, loc_t *loc)
 {
@@ -343,3 +345,41 @@ dht_stat_merge (xlator_t *this, struct stat *to,
 
 	return 0;
 }
+
+
+int
+dht_build_child_loc (xlator_t *this, loc_t *child, loc_t *parent, char *name)
+{
+        if (!child) {
+                goto err;
+        }
+
+        if (strcmp (parent->path, "/") == 0)
+                asprintf ((char **)&child->path, "/%s", name);
+        else
+                asprintf ((char **)&child->path, "%s/%s", parent->path, name);
+
+        if (!child->path) {
+                gf_log (this->name, GF_LOG_ERROR,
+                        "Out of memory");
+                goto err;
+        }
+
+        child->name = strrchr (child->path, '/');
+        if (child->name)
+                child->name++;
+
+        child->parent = inode_ref (parent->inode);
+        child->inode = inode_new (parent->inode->table);
+
+        if (!child->inode) {
+                gf_log (this->name, GF_LOG_ERROR,
+                        "Out of memory");
+                goto err;
+        }
+
+        return 0;
+err:
+        loc_wipe (child);
+        return -1;
+}