distribute: perform self-heal as root

prerserve original frame uid and gid and perform self-heal by changing
uid/gid to root (0) temporarily.

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

BUG: 597 (miscellaneous fixes for xlators to work well with NFS xlator)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=597

1 files changed, 30 insertions, 0 deletions

diff --git a/xlators/cluster/dht/src/dht-helper.c b/xlators/cluster/dht/src/dht-helper.c
index ebc0e5e01..fc7f7a4bf 100644
--- a/xlators/cluster/dht/src/dht-helper.c
+++ b/xlators/cluster/dht/src/dht-helper.c
@@ -367,6 +367,36 @@ dht_stat_merge (xlator_t *this, struct stat *to,
 	return 0;
 }
 
+int
+dht_frame_su_do (call_frame_t *frame)
+{
+        dht_local_t     *local = NULL;
+
+        local = frame->local;
+
+        local->uid = frame->root->uid;
+        local->gid = frame->root->gid;
+
+        frame->root->uid = 0;
+        frame->root->gid = 0;
+
+        return 0;
+}
+
+
+int
+dht_frame_su_undo (call_frame_t *frame)
+{
+        dht_local_t     *local = NULL;
+
+        local = frame->local;
+
+        frame->root->uid = local->uid;
+        frame->root->gid = local->gid;
+
+        return 0;
+}
+
 
 int
 dht_build_child_loc (xlator_t *this, loc_t *child, loc_t *parent, char *name)