mgmt/glusterd: preserve delete volume payload structure for backward compatibility

Signed-off-by: Pranith Kumar K <pranithk@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 2494 ([glusterfs-3.1.3qa4]: replace brick and delete volume fails)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2494

4 files changed, 89 insertions, 50 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-handler.c b/xlators/mgmt/glusterd/src/glusterd-handler.c
index 3856de86f..b3e929654 100644
--- a/xlators/mgmt/glusterd/src/glusterd-handler.c
+++ b/xlators/mgmt/glusterd/src/glusterd-handler.c
@@ -444,6 +444,8 @@ glusterd_handle_stage_op (rpcsvc_request_t *req)
         int32_t                         ret = -1;
         gd1_mgmt_stage_op_req           stage_req = {{0,}};
         glusterd_op_stage_ctx_t         *ctx = NULL;
+        char                            volname[GLUSTERD_MAX_VOLUME_NAME] = {0};
+        char                            *dup_volname = NULL;
 
         GF_ASSERT (req);
 
@@ -473,13 +475,25 @@ glusterd_handle_stage_op (rpcsvc_request_t *req)
         if (!stage_req.buf.buf_val)
                 goto out;
 
-        ret = dict_unserialize (stage_req.buf.buf_val,
-                                stage_req.buf.buf_len,
-                                &ctx->dict);
+        if (GD_OP_DELETE_VOLUME == stage_req.op) {
+                strncpy (volname, stage_req.buf.buf_val, stage_req.buf.buf_len);
+                dup_volname = gf_strdup (volname);
+                if (dup_volname) {
+                        ret = dict_set_dynstr (ctx->dict, "volname", dup_volname);
+                        if (ret)
+                                gf_log ("", GF_LOG_WARNING,
+                                        "failed to set volume name from payload");
+                }
 
-        if (ret)
-                gf_log ("", GF_LOG_WARNING,
-                        "failed to unserialize the dictionary");
+        } else {
+                ret = dict_unserialize (stage_req.buf.buf_val,
+                                        stage_req.buf.buf_len,
+                                        &ctx->dict);
+
+                if (ret)
+                        gf_log ("", GF_LOG_WARNING,
+                                "failed to unserialize the dictionary");
+        }
 
         ret = glusterd_op_sm_inject_event (GD_OP_EVENT_STAGE_OP, ctx);
 
@@ -499,6 +513,8 @@ glusterd_handle_commit_op (rpcsvc_request_t *req)
         int32_t                         ret = -1;
         gd1_mgmt_commit_op_req          commit_req = {{0},};
         glusterd_op_commit_ctx_t        *ctx = NULL;
+        char                            volname[GLUSTERD_MAX_VOLUME_NAME] = {0};
+        char                            *dup_volname = NULL;
 
         GF_ASSERT (req);
 
@@ -531,12 +547,25 @@ glusterd_handle_commit_op (rpcsvc_request_t *req)
         if (!commit_req.buf.buf_val)
                 goto out;
 
-        ret = dict_unserialize (commit_req.buf.buf_val,
-                                commit_req.buf.buf_len,
-                                &ctx->dict);
-        if (ret)
-                gf_log ("", GF_LOG_WARNING,
-                        "failed to unserialize the dictionary");
+        if (GD_OP_DELETE_VOLUME == commit_req.op) {
+                strncpy (volname, commit_req.buf.buf_val, commit_req.buf.buf_len);
+                dup_volname = gf_strdup (volname);
+                if (dup_volname) {
+                        ret = dict_set_dynstr (ctx->dict, "volname", dup_volname);
+                        if (ret)
+                                gf_log ("", GF_LOG_WARNING,
+                                        "failed to set volume name from payload");
+                }
+
+        } else {
+                ret = dict_unserialize (commit_req.buf.buf_val,
+                                        commit_req.buf.buf_len,
+                                        &ctx->dict);
+
+                if (ret)
+                        gf_log ("", GF_LOG_WARNING,
+                                "failed to unserialize the dictionary");
+        }
 
         ret = glusterd_op_sm_inject_event (GD_OP_EVENT_COMMIT_OP, ctx);
 
diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.c b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
index 2f6053ab8..a25f4909b 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.c
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
@@ -4757,10 +4757,6 @@ glusterd_op_build_payload (glusterd_op_t op, dict_t **req)
         if (!req_dict)
                 goto out;
 
-        ret = dict_set_int32 (req_dict, "operation", op);
-        if (ret)
-                gf_log ("", GF_LOG_WARNING, "failed to set op");
-
         ctx = (void*)glusterd_op_get_ctx (op);
         if (!ctx) {
                 gf_log ("", GF_LOG_ERROR, "Null Context for "
@@ -4857,7 +4853,7 @@ glusterd_op_ac_send_stage_op (glusterd_op_sm_event_t *event, void *ctx)
                 goto out;
 
         /* rsp_dict NULL from source */
-        ret = glusterd_op_stage_validate (dict, &op_errstr, NULL);
+        ret = glusterd_op_stage_validate (i, dict, &op_errstr, NULL);
         if (ret) {
                 gf_log ("", GF_LOG_ERROR, "Staging failed");
                 opinfo.op_errstr = op_errstr;
@@ -4891,6 +4887,8 @@ glusterd_op_ac_send_stage_op (glusterd_op_sm_event_t *event, void *ctx)
 
         opinfo.pending_count = pending_count;
 out:
+        if (dict)
+                dict_unref (dict);
         if (ret) {
                 glusterd_op_sm_inject_event (GD_OP_EVENT_RCVD_RJT, NULL);
                 opinfo.op_ret = ret;
@@ -4953,6 +4951,7 @@ glusterd_op_ac_send_commit_op (glusterd_op_sm_event_t *event, void *ctx)
         glusterd_conf_t         *priv = NULL;
         xlator_t                *this = NULL;
         dict_t                  *dict = NULL;
+        dict_t                  *op_dict = NULL;
         glusterd_peerinfo_t     *peerinfo = NULL;
         char                    *op_errstr  = NULL;
         int                      i = 0;
@@ -4980,7 +4979,7 @@ glusterd_op_ac_send_commit_op (glusterd_op_sm_event_t *event, void *ctx)
         if (ret)
                 goto out;
 
-        ret = glusterd_op_commit_perform (dict, &op_errstr, NULL); //rsp_dict invalid for source
+        ret = glusterd_op_commit_perform (i, dict, &op_errstr, NULL); //rsp_dict invalid for source
         if (ret) {
                 gf_log ("", GF_LOG_ERROR, "Commit failed");
                 opinfo.op_errstr = op_errstr;
@@ -5015,20 +5014,22 @@ glusterd_op_ac_send_commit_op (glusterd_op_sm_event_t *event, void *ctx)
         gf_log ("glusterd", GF_LOG_NORMAL, "Sent op req to %d peers",
                 opinfo.pending_count);
 out:
+        if (dict)
+                dict_unref (dict);
         if (ret) {
                 glusterd_op_sm_inject_event (GD_OP_EVENT_RCVD_RJT, NULL);
                 opinfo.op_ret = ret;
         }
 
         if (!opinfo.pending_count) {
-                dict = glusterd_op_get_ctx (GD_OP_REPLACE_BRICK);
-                if (!dict) {
+                op_dict = glusterd_op_get_ctx (GD_OP_REPLACE_BRICK);
+                if (!op_dict) {
                         ret = glusterd_op_sm_inject_all_acc ();
                         goto err;
                 }
 
-                dict = dict_ref (dict);
-                ret = glusterd_op_start_rb_timer (dict);
+                op_dict = dict_ref (op_dict);
+                ret = glusterd_op_start_rb_timer (op_dict);
         }
 
 err:
@@ -5386,7 +5387,7 @@ glusterd_op_ac_stage_op (glusterd_op_sm_event_t *event, void *ctx)
                 return -1;
         }
 
-        status = glusterd_op_stage_validate (dict, &op_errstr,
+        status = glusterd_op_stage_validate (stage_ctx->op, dict, &op_errstr,
                                              rsp_dict);
 
         if (status) {
@@ -5431,7 +5432,8 @@ glusterd_op_ac_commit_op (glusterd_op_sm_event_t *event, void *ctx)
                 goto out;
         }
 
-        status = glusterd_op_commit_perform (dict, &op_errstr, rsp_dict);
+        status = glusterd_op_commit_perform (commit_ctx->op, dict, &op_errstr,
+                                             rsp_dict);
 
         if (status) {
                 gf_log ("", GF_LOG_ERROR, "Commit failed: %d", status);
@@ -5475,15 +5477,10 @@ glusterd_op_sm_transition_state (glusterd_op_info_t *opinfo,
 }
 
 int32_t
-glusterd_op_stage_validate (dict_t *dict, char **op_errstr,
+glusterd_op_stage_validate (glusterd_op_t op, dict_t *dict, char **op_errstr,
                             dict_t *rsp_dict)
 {
         int ret = -1;
-        int op  = -1;
-
-        ret = dict_get_int32 (dict, "operation", &op);
-        if (ret)
-                gf_log ("", GF_LOG_WARNING, "operation not set");
 
         switch (op) {
                 case GD_OP_CREATE_VOLUME:
@@ -5551,15 +5548,10 @@ glusterd_op_stage_validate (dict_t *dict, char **op_errstr,
 
 
 int32_t
-glusterd_op_commit_perform (dict_t *dict, char **op_errstr,
+glusterd_op_commit_perform (glusterd_op_t op, dict_t *dict, char **op_errstr,
                             dict_t *rsp_dict)
 {
         int ret = -1;
-        int op  = -1;
-
-        ret = dict_get_int32 (dict, "operation", &op);
-        if (ret)
-                gf_log ("", GF_LOG_WARNING, "operation not set");
 
         switch (op) {
                 case GD_OP_CREATE_VOLUME:
diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.h b/xlators/mgmt/glusterd/src/glusterd-op-sm.h
index d47f6a6f2..30d4fe9c8 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.h
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.h
@@ -175,11 +175,11 @@ int
 glusterd_op_build_payload (glusterd_op_t op, dict_t **req);
 
 int32_t
-glusterd_op_stage_validate (dict_t *req, char **op_errstr,
+glusterd_op_stage_validate (glusterd_op_t op, dict_t *req, char **op_errstr,
                             dict_t *rsp_dict);
 
 int32_t
-glusterd_op_commit_perform (dict_t *req, char **op_errstr,
+glusterd_op_commit_perform (glusterd_op_t op, dict_t *req, char **op_errstr,
                             dict_t* dict);
 
 void *
diff --git a/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c b/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
index fe97183c4..e7134c990 100644
--- a/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
+++ b/xlators/mgmt/glusterd/src/glusterd-rpc-ops.c
@@ -1298,6 +1298,7 @@ glusterd3_1_stage_op (call_frame_t *frame, xlator_t *this,
         glusterd_conf_t                 *priv = NULL;
         call_frame_t                    *dummy_frame = NULL;
         dict_t                          *dict = NULL;
+        gf_boolean_t                    is_alloc = _gf_true;
 
         if (!this) {
                 goto out;
@@ -1315,15 +1316,23 @@ glusterd3_1_stage_op (call_frame_t *frame, xlator_t *this,
         //peerinfo should not be in payload
         dict_del (dict, "peerinfo");
 
-        ret = dict_allocate_and_serialize (dict, &req.buf.buf_val,
-                                           (size_t *)&req.buf.buf_len);
-
-        if (ret)
-                goto out;
-
         glusterd_get_uuid (&req.uuid);
         req.op = glusterd_op_get_op ();
 
+        if (GD_OP_DELETE_VOLUME == req.op) {
+                ret = dict_get_str (dict, "volname", &req.buf.buf_val);
+                if (ret)
+                        goto out;
+                req.buf.buf_len = strlen (req.buf.buf_val);
+                is_alloc = _gf_false;
+        } else {
+                ret = dict_allocate_and_serialize (dict, &req.buf.buf_val,
+                                                   (size_t *)&req.buf.buf_len);
+
+                if (ret)
+                        goto out;
+        }
+
         dummy_frame = create_frame (this, this->ctx->pool);
         if (!dummy_frame)
                 goto out;
@@ -1335,7 +1344,7 @@ glusterd3_1_stage_op (call_frame_t *frame, xlator_t *this,
                                        this, glusterd3_1_stage_op_cbk);
 
 out:
-        if (req.buf.buf_val)
+        if ((_gf_true == is_alloc) && req.buf.buf_val)
                 GF_FREE (req.buf.buf_val);
 
         gf_log ("glusterd", GF_LOG_DEBUG, "Returning %d", ret);
@@ -1352,6 +1361,7 @@ glusterd3_1_commit_op (call_frame_t *frame, xlator_t *this,
         glusterd_conf_t        *priv        = NULL;
         call_frame_t           *dummy_frame = NULL;
         dict_t                 *dict        = NULL;
+        gf_boolean_t            is_alloc    = _gf_true;
 
         if (!this) {
                 goto out;
@@ -1371,11 +1381,19 @@ glusterd3_1_commit_op (call_frame_t *frame, xlator_t *this,
         glusterd_get_uuid (&req.uuid);
         req.op = glusterd_op_get_op ();
 
-        ret = dict_allocate_and_serialize (dict, &req.buf.buf_val,
-                                           (size_t *)&req.buf.buf_len);
+        if (GD_OP_DELETE_VOLUME == req.op) {
+                ret = dict_get_str (dict, "volname", &req.buf.buf_val);
+                if (ret)
+                        goto out;
+                req.buf.buf_len = strlen (req.buf.buf_val);
+                is_alloc = _gf_false;
+        } else {
+                ret = dict_allocate_and_serialize (dict, &req.buf.buf_val,
+                                                   (size_t *)&req.buf.buf_len);
 
-        if (ret)
-                goto out;
+                if (ret)
+                        goto out;
+        }
 
         dummy_frame = create_frame (this, this->ctx->pool);
         if (!dummy_frame)
@@ -1388,7 +1406,7 @@ glusterd3_1_commit_op (call_frame_t *frame, xlator_t *this,
                                        this, glusterd3_1_commit_op_cbk);
 
 out:
-        if (req.buf.buf_val)
+        if ((_gf_true == is_alloc) && req.buf.buf_val)
                 GF_FREE (req.buf.buf_val);
 
         gf_log ("glusterd", GF_LOG_DEBUG, "Returning %d", ret);