features/marker-quota: Perform xattr related operations with root permissions in rename fop.

Change-Id: Id9ac1ecdd9753377c9eb24464f51dcbdc0cd2821
BUG: 3194
Reviewed-on: http://review.gluster.com/367
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vijay@gluster.com>

2 files changed, 39 insertions, 6 deletions

diff --git a/xlators/features/marker/src/marker.c b/xlators/features/marker/src/marker.c
index d0f01465ffa..2c60c3d50a2 100644
--- a/xlators/features/marker/src/marker.c
+++ b/xlators/features/marker/src/marker.c
@@ -31,6 +31,8 @@
 #include "marker-common.h"
 #include "byte-order.h"
 
+#define _GF_UID_GID_CHANGED 1
+
 void
 fini (xlator_t *this);
 
@@ -1019,8 +1021,9 @@ marker_rename_release_oldp_lock (call_frame_t *frame, void *cookie,
                 local->err = op_errno;
         }
 
-        //Reset frame uid and gid if reset.
-        MARKER_SET_UID_GID (frame->root, local);
+        //Reset frame uid and gid if set.
+        if (cookie == (void *) _GF_UID_GID_CHANGED)
+                MARKER_RESET_UID_GID (frame, frame->root, local);
 
         lock.l_type   = F_UNLCK;
         lock.l_whence = SEEK_SET;
@@ -1092,9 +1095,7 @@ marker_rename_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                 /* Removexattr requires uid and gid to be 0,
                  * reset them in the callback.
                  */
-                MARKER_SET_UID_GID (local, frame->root);
-                frame->root->uid = 0;
-                frame->root->gid = 0;
+                MARKER_SET_UID_GID (frame, local, frame->root);
 
                 STACK_WIND (frame, marker_rename_release_oldp_lock,
                             FIRST_CHILD(this),
@@ -1145,6 +1146,10 @@ marker_do_rename (call_frame_t *frame, void *cookie, xlator_t *this,
         local = frame->local;
         oplocal = local->oplocal;
 
+        //Reset frame uid and gid if set.
+        if (cookie == (void *) _GF_UID_GID_CHANGED)
+                MARKER_RESET_UID_GID (frame, frame->root, local);
+
         if ((op_ret < 0) && (op_errno != ENOATTR)) {
                 local->err = op_errno;
                 gf_log (this->name, GF_LOG_WARNING,
@@ -1194,6 +1199,10 @@ marker_get_newpath_contribution (call_frame_t *frame, void *cookie,
         local = frame->local;
         oplocal = local->oplocal;
 
+        //Reset frame uid and gid if set.
+        if (cookie == (void *) _GF_UID_GID_CHANGED)
+                MARKER_RESET_UID_GID (frame, frame->root, local);
+
         if ((op_ret < 0) && (op_errno != ENOATTR)) {
                 local->err = op_errno;
                 gf_log (this->name, GF_LOG_WARNING,
@@ -1221,6 +1230,11 @@ marker_get_newpath_contribution (call_frame_t *frame, void *cookie,
                         goto err;
                 }
 
+                /* getxattr requires uid and gid to be 0,
+                 * reset them in the callback.
+                 */
+                MARKER_SET_UID_GID (frame, local, frame->root);
+
                 STACK_WIND (frame, marker_do_rename,
                             FIRST_CHILD(this),
                             FIRST_CHILD(this)->fops->getxattr, &local->loc,
@@ -1266,6 +1280,11 @@ marker_get_oldpath_contribution (call_frame_t *frame, void *cookie,
                 goto quota_err;
         }
 
+        /* getxattr requires uid and gid to be 0,
+         * reset them in the callback.
+         */
+        MARKER_SET_UID_GID (frame, local, frame->root);
+
         STACK_WIND (frame, marker_get_newpath_contribution, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->getxattr, &oplocal->loc,
                     contri_key);
diff --git a/xlators/features/marker/src/marker.h b/xlators/features/marker/src/marker.h
index 5502c4ea137..f5ed9df399e 100644
--- a/xlators/features/marker/src/marker.h
+++ b/xlators/features/marker/src/marker.h
@@ -64,7 +64,7 @@ enum {
                 }                                                \
         } while (0)
 
-#define MARKER_SET_UID_GID(dest, src)           \
+#define _MARKER_SET_UID_GID(dest, src)          \
         do {                                    \
                 if (src->uid != -1 &&           \
                     src->gid != -1) {           \
@@ -73,6 +73,20 @@ enum {
                 }                               \
         } while (0)
 
+#define MARKER_SET_UID_GID(frame, dest, src)                    \
+        do {                                                    \
+                _MARKER_SET_UID_GID (dest, src);                \
+                frame->root->uid = 0;                           \
+                frame->root->gid = 0;                           \
+                frame->cookie = (void *) _GF_UID_GID_CHANGED;   \
+        } while (0)
+
+#define MARKER_RESET_UID_GID(frame, dest, src)                  \
+        do {                                                    \
+                _MARKER_SET_UID_GID (dest, src);                \
+                frame->cookie = NULL;                           \
+        } while (0)
+
 struct marker_local{
         uint32_t        timebuf[2];
         pid_t           pid;