glusterd: Fix coverity defects & put coverity annotations

Along with fixing few defect, put the required annotations for the defects which
are marked ignore/false positive/intentional as per the coverity defect sheet.
This should avoid the per component graph showing many defects as open in the
coverity glusterfs web page.

Updates: bz#789278
Change-Id: I19461dc3603a3bd8f88866a1ab3db43d783af8e4
Signed-off-by: Atin Mukherjee <amukherj@redhat.com>

14 files changed, 65 insertions, 33 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-brick-ops.c b/xlators/mgmt/glusterd/src/glusterd-brick-ops.c
index 4d18eb3cd96..4eef53eb2bd 100644
--- a/xlators/mgmt/glusterd/src/glusterd-brick-ops.c
+++ b/xlators/mgmt/glusterd/src/glusterd-brick-ops.c
@@ -1974,7 +1974,6 @@ glusterd_op_stage_remove_brick(dict_t *dict, char **op_errstr)
         case GF_OP_CMD_STATUS:
             ret = 0;
             goto out;
-
         case GF_OP_CMD_DETACH_START:
             if (volinfo->type != GF_CLUSTER_TYPE_TIER) {
                 snprintf(msg, sizeof(msg),
@@ -1986,7 +1985,7 @@ glusterd_op_stage_remove_brick(dict_t *dict, char **op_errstr)
                        errstr);
                 goto out;
             }
-
+        /* Fall through */
         case GF_OP_CMD_START: {
             if ((volinfo->type == GF_CLUSTER_TYPE_REPLICATE) &&
                 dict_getn(dict, "replica-count", SLEN("replica-count"))) {
@@ -2190,7 +2189,8 @@ out:
         if (op_errstr)
             *op_errstr = errstr;
     }
-
+    if (!op_errstr && errstr)
+        GF_FREE(errstr);
     return ret;
 }
 
@@ -2618,6 +2618,7 @@ glusterd_op_remove_brick(dict_t *dict, char **op_errstr)
              * Update defrag_cmd as well or it will only be done
              * for nodes on which the brick to be removed exists.
              */
+            /* coverity[MIXED_ENUMS] */
             volinfo->rebal.defrag_cmd = cmd;
             volinfo->rebal.defrag_status = GF_DEFRAG_STATUS_NOT_STARTED;
             ret = dict_get_strn(dict, GF_REMOVE_BRICK_TID_KEY,
diff --git a/xlators/mgmt/glusterd/src/glusterd-geo-rep.c b/xlators/mgmt/glusterd/src/glusterd-geo-rep.c
index c859bf4c5bc..636ae354fb3 100644
--- a/xlators/mgmt/glusterd/src/glusterd-geo-rep.c
+++ b/xlators/mgmt/glusterd/src/glusterd-geo-rep.c
@@ -4096,6 +4096,7 @@ gd_pause_or_resume_gsync(dict_t *dict, char *master, char *slave,
 
 out:
     sys_close(pfd);
+    /* coverity[INTEGER_OVERFLOW] */
     return ret;
 }
 
@@ -4172,7 +4173,7 @@ stop_gsync(char *master, char *slave, char **msg, char *conf_path,
 
 out:
     sys_close(pfd);
-
+    /* coverity[INTEGER_OVERFLOW] */
     return ret;
 }
 
diff --git a/xlators/mgmt/glusterd/src/glusterd-gfproxyd-svc-helper.c b/xlators/mgmt/glusterd/src/glusterd-gfproxyd-svc-helper.c
index 67e3f41e5dd..e338bf47d29 100644
--- a/xlators/mgmt/glusterd/src/glusterd-gfproxyd-svc-helper.c
+++ b/xlators/mgmt/glusterd/src/glusterd-gfproxyd-svc-helper.c
@@ -111,7 +111,7 @@ glusterd_svc_get_gfproxyd_volfile(glusterd_volinfo_t *volinfo, char *svc_name,
         goto out;
     }
 
-    /* coverity[secure_temp] mkstemp uses 0600 as the mode and is safe */
+    /* coverity[SECURE_TEMP] mkstemp uses 0600 as the mode and is safe */
     tmp_fd = mkstemp(*tmpvol);
     if (tmp_fd < 0) {
         gf_msg("glusterd", GF_LOG_WARNING, errno, GD_MSG_FILE_OP_FAILED,
diff --git a/xlators/mgmt/glusterd/src/glusterd-handler.c b/xlators/mgmt/glusterd/src/glusterd-handler.c
index aabfe3f3df5..b28ca1a9e54 100644
--- a/xlators/mgmt/glusterd/src/glusterd-handler.c
+++ b/xlators/mgmt/glusterd/src/glusterd-handler.c
@@ -833,6 +833,7 @@ __glusterd_handle_cluster_lock(rpcsvc_request_t *req)
 
     op_ctx = dict_new();
     if (!op_ctx) {
+        ret = -1;
         gf_msg(this->name, GF_LOG_ERROR, ENOMEM, GD_MSG_DICT_CREATE_FAIL,
                "Unable to set new dict");
         goto out;
@@ -859,6 +860,9 @@ out:
     glusterd_friend_sm();
     glusterd_op_sm();
 
+    if (ret)
+        GF_FREE(ctx);
+
     return ret;
 }
 
@@ -3305,6 +3309,7 @@ glusterd_rpc_create(struct rpc_clnt **rpc, dict_t *options,
     GF_ASSERT(this);
 
     GF_ASSERT(options);
+    GF_VALIDATE_OR_GOTO(this->name, rpc, out);
 
     if (force && rpc && *rpc) {
         (void)rpc_clnt_unref(*rpc);
@@ -3317,7 +3322,6 @@ glusterd_rpc_create(struct rpc_clnt **rpc, dict_t *options,
         goto out;
 
     ret = rpc_clnt_register_notify(new_rpc, notify_fn, notify_data);
-    *rpc = new_rpc;
     if (ret)
         goto out;
     ret = rpc_clnt_start(new_rpc);
@@ -3326,6 +3330,8 @@ out:
         if (new_rpc) {
             (void)rpc_clnt_unref(new_rpc);
         }
+    } else {
+        *rpc = new_rpc;
     }
 
     gf_msg_debug(this->name, 0, "returning %d", ret);
diff --git a/xlators/mgmt/glusterd/src/glusterd-mountbroker.c b/xlators/mgmt/glusterd/src/glusterd-mountbroker.c
index 332ddefd2e9..c017ccb6b01 100644
--- a/xlators/mgmt/glusterd/src/glusterd-mountbroker.c
+++ b/xlators/mgmt/glusterd/src/glusterd-mountbroker.c
@@ -334,7 +334,10 @@ make_ghadoop_mountspec(gf_mount_spec_t *mspec, const char *volname, char *user,
     if (ret == -1)
         return ret;
 
-    return parse_mount_pattern_desc(mspec, hadoop_mnt_desc);
+    ret = parse_mount_pattern_desc(mspec, hadoop_mnt_desc);
+    GF_FREE(hadoop_mnt_desc);
+
+    return ret;
 }
 
 static gf_boolean_t
diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.c b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
index b51892a6e0e..460fc476707 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.c
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
@@ -2417,6 +2417,7 @@ glusterd_start_bricks(glusterd_volinfo_t *volinfo)
         if (!brickinfo->start_triggered) {
             pthread_mutex_lock(&brickinfo->restart_mutex);
             {
+                /* coverity[SLEEP] */
                 ret = glusterd_brick_start(volinfo, brickinfo, _gf_false,
                                            _gf_false);
             }
@@ -3425,6 +3426,7 @@ _add_task_to_dict(dict_t *dict, glusterd_volinfo_t *volinfo, int op, int index)
 
     switch (op) {
         case GD_OP_REMOVE_TIER_BRICK:
+        /* Fall through */
         case GD_OP_REMOVE_BRICK:
             snprintf(key, sizeof(key), "task%d", index);
             ret = _add_remove_bricks_to_dict(dict, volinfo, key);
@@ -7504,6 +7506,7 @@ glusterd_op_ac_send_brick_op(glusterd_op_sm_event_t *event, void *ctx)
     glusterd_op_t op = GD_OP_NONE;
     glusterd_req_ctx_t *req_ctx = NULL;
     char *op_errstr = NULL;
+    gf_boolean_t free_req_ctx = _gf_false;
 
     this = THIS;
     priv = this->private;
@@ -7512,6 +7515,9 @@ glusterd_op_ac_send_brick_op(glusterd_op_sm_event_t *event, void *ctx)
         req_ctx = ctx;
     } else {
         req_ctx = GF_CALLOC(1, sizeof(*req_ctx), gf_gld_mt_op_allack_ctx_t);
+        if (!req_ctx)
+            goto out;
+        free_req_ctx = _gf_true;
         op = glusterd_op_get_op();
         req_ctx->op = op;
         gf_uuid_copy(req_ctx->uuid, MY_UUID);
@@ -7542,6 +7548,8 @@ glusterd_op_ac_send_brick_op(glusterd_op_sm_event_t *event, void *ctx)
     }
 
 out:
+    if (ret && req_ctx && free_req_ctx)
+        GF_FREE(req_ctx);
     gf_msg_debug(this->name, 0, "Returning with %d", ret);
 
     return ret;
diff --git a/xlators/mgmt/glusterd/src/glusterd-peer-utils.c b/xlators/mgmt/glusterd/src/glusterd-peer-utils.c
index 7097439b9ff..ce4805b8d6d 100644
--- a/xlators/mgmt/glusterd/src/glusterd-peer-utils.c
+++ b/xlators/mgmt/glusterd/src/glusterd-peer-utils.c
@@ -82,6 +82,7 @@ glusterd_peerinfo_cleanup(glusterd_peerinfo_t *peerinfo)
     call_rcu(&peerinfo->rcu_head.head, glusterd_peerinfo_destroy);
 
     if (quorum_action)
+        /* coverity[SLEEP] */
         glusterd_do_quorum_action();
     return 0;
 }
@@ -358,6 +359,7 @@ glusterd_uuid_to_hostname(uuid_t uuid)
 
     if (!gf_uuid_compare(MY_UUID, uuid)) {
         hostname = gf_strdup("localhost");
+        return hostname;
     }
     RCU_READ_LOCK;
     if (!cds_list_empty(&priv->peers)) {
diff --git a/xlators/mgmt/glusterd/src/glusterd-server-quorum.c b/xlators/mgmt/glusterd/src/glusterd-server-quorum.c
index fd334e6aff2..f3781879d99 100644
--- a/xlators/mgmt/glusterd/src/glusterd-server-quorum.c
+++ b/xlators/mgmt/glusterd/src/glusterd-server-quorum.c
@@ -372,6 +372,7 @@ glusterd_do_volume_quorum_action(xlator_t *this, glusterd_volinfo_t *volinfo,
             if (!brickinfo->start_triggered) {
                 pthread_mutex_lock(&brickinfo->restart_mutex);
                 {
+                    /* coverity[SLEEP] */
                     ret = glusterd_brick_start(volinfo, brickinfo, _gf_false,
                                                _gf_false);
                 }
diff --git a/xlators/mgmt/glusterd/src/glusterd-store.c b/xlators/mgmt/glusterd/src/glusterd-store.c
index 7acea053496..b6ebbd76a10 100644
--- a/xlators/mgmt/glusterd/src/glusterd-store.c
+++ b/xlators/mgmt/glusterd/src/glusterd-store.c
@@ -4747,10 +4747,6 @@ glusterd_store_retrieve_peers(xlator_t *this)
          */
         address = cds_list_entry(peerinfo->hostnames.next,
                                  glusterd_peer_hostname_t, hostname_list);
-        if (!address) {
-            ret = -1;
-            goto next;
-        }
         peerinfo->hostname = gf_strdup(address->hostname);
 
         ret = glusterd_friend_add_from_peerinfo(peerinfo, 1, NULL);
diff --git a/xlators/mgmt/glusterd/src/glusterd-svc-helper.c b/xlators/mgmt/glusterd/src/glusterd-svc-helper.c
index f7be3949b37..5b95a026fbe 100644
--- a/xlators/mgmt/glusterd/src/glusterd-svc-helper.c
+++ b/xlators/mgmt/glusterd/src/glusterd-svc-helper.c
@@ -189,7 +189,7 @@ glusterd_svc_check_volfile_identical(char *svc_name,
         goto out;
     }
 
-    /* coverity[secure_temp] mkstemp uses 0600 as the mode and is safe */
+    /* coverity[SECURE_TEMP] mkstemp uses 0600 as the mode and is safe */
     tmp_fd = mkstemp(tmpvol);
     if (tmp_fd < 0) {
         gf_msg(this->name, GF_LOG_WARNING, errno, GD_MSG_FILE_OP_FAILED,
@@ -251,7 +251,7 @@ glusterd_svc_check_topology_identical(char *svc_name,
         goto out;
     }
 
-    /* coverity[secure_temp] mkstemp uses 0600 as the mode and is safe */
+    /* coverity[SECURE_TEMP] mkstemp uses 0600 as the mode and is safe */
     tmpfd = mkstemp(tmpvol);
     if (tmpfd < 0) {
         gf_msg(this->name, GF_LOG_WARNING, errno, GD_MSG_FILE_OP_FAILED,
@@ -308,7 +308,7 @@ glusterd_volume_svc_check_volfile_identical(
         goto out;
     }
 
-    /* coverity[secure_temp] mkstemp uses 0600 as the mode and is safe */
+    /* coverity[SECURE_TEMP] mkstemp uses 0600 as the mode and is safe */
     tmp_fd = mkstemp(tmpvol);
     if (tmp_fd < 0) {
         gf_msg(this->name, GF_LOG_WARNING, errno, GD_MSG_FILE_OP_FAILED,
@@ -369,7 +369,7 @@ glusterd_volume_svc_check_topology_identical(
         goto out;
     }
 
-    /* coverity[secure_temp] mkstemp uses 0600 as the mode and is safe */
+    /* coverity[SECURE_TEMP] mkstemp uses 0600 as the mode and is safe */
     tmpfd = mkstemp(tmpvol);
     if (tmpfd < 0) {
         gf_msg(this->name, GF_LOG_WARNING, errno, GD_MSG_FILE_OP_FAILED,
diff --git a/xlators/mgmt/glusterd/src/glusterd-syncop.c b/xlators/mgmt/glusterd/src/glusterd-syncop.c
index 60a25ad974a..7651a3b0fad 100644
--- a/xlators/mgmt/glusterd/src/glusterd-syncop.c
+++ b/xlators/mgmt/glusterd/src/glusterd-syncop.c
@@ -1766,6 +1766,7 @@ gd_brick_op_phase(glusterd_op_t op, dict_t *op_ctx, dict_t *req_dict,
                 if (dict_get(op_ctx, "client-count"))
                     break;
             }
+            /* coverity[MIXED_ENUMS] */
         } else if (cmd == GF_OP_CMD_DETACH_START) {
             op = GD_OP_REMOVE_BRICK;
             dict_del(req_dict, "rebalance-command");
diff --git a/xlators/mgmt/glusterd/src/glusterd-tierd-svc-helper.c b/xlators/mgmt/glusterd/src/glusterd-tierd-svc-helper.c
index 922eae7018f..59843a0e68f 100644
--- a/xlators/mgmt/glusterd/src/glusterd-tierd-svc-helper.c
+++ b/xlators/mgmt/glusterd/src/glusterd-tierd-svc-helper.c
@@ -116,7 +116,7 @@ glusterd_svc_check_tier_volfile_identical(char *svc_name,
         goto out;
     }
 
-    /* coverity[secure_temp] mkstemp uses 0600 as the mode and is safe */
+    /* coverity[SECURE_TEMP] mkstemp uses 0600 as the mode and is safe */
     tmp_fd = mkstemp(tmpvol);
     if (tmp_fd < 0) {
         gf_msg(this->name, GF_LOG_WARNING, errno, GD_MSG_FILE_OP_FAILED,
@@ -177,7 +177,7 @@ glusterd_svc_check_tier_topology_identical(char *svc_name,
         goto out;
     }
 
-    /* coverity[secure_temp] mkstemp uses 0600 as the mode and is safe */
+    /* coverity[SECURE_TEMP] mkstemp uses 0600 as the mode and is safe */
     tmpfd = mkstemp(tmpvol);
     if (tmpfd < 0) {
         gf_msg(this->name, GF_LOG_WARNING, errno, GD_MSG_FILE_OP_FAILED,
diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.c b/xlators/mgmt/glusterd/src/glusterd-utils.c
index 4a2caa34f78..7ec8a4cf1ce 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.c
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.c
@@ -903,6 +903,7 @@ glusterd_create_sub_tier_volinfo(glusterd_volinfo_t *volinfo,
         (*dup_volinfo)->brick_count = tier_info->cold_brick_count;
     }
 out:
+    /* coverity[REVERSE_NULL] */
     if (ret && *dup_volinfo) {
         glusterd_volinfo_delete(*dup_volinfo);
         *dup_volinfo = NULL;
@@ -2662,6 +2663,7 @@ glusterd_readin_file(const char *filepath, int *line_count)
     /* Reduce allocation to minimal size.  */
     p = GF_REALLOC(lines, (counter + 1) * sizeof(char *));
     if (!p) {
+        /* coverity[TAINTED_SCALAR] */
         free_lines(lines, counter);
         lines = NULL;
         goto out;
@@ -6573,6 +6575,7 @@ glusterd_restart_bricks(void *opaque)
                 if (!brickinfo->start_triggered) {
                     pthread_mutex_lock(&brickinfo->restart_mutex);
                     {
+                        /* coverity[SLEEP] */
                         glusterd_brick_start(volinfo, brickinfo, _gf_false,
                                              _gf_false);
                     }
@@ -8682,7 +8685,7 @@ glusterd_nfs_statedump(char *options, int option_cnt, char **op_errstr)
     kill(pid, SIGUSR1);
 
     sleep(1);
-
+    /* coverity[TAINTED_STRING] */
     sys_unlink(dumpoptions_path);
     ret = 0;
 out:
@@ -8814,6 +8817,7 @@ glusterd_quotad_statedump(char *options, int option_cnt, char **op_errstr)
 
     sleep(1);
 
+    /* coverity[TAINTED_STRING] */
     sys_unlink(dumpoptions_path);
     ret = 0;
 out:
@@ -13206,7 +13210,7 @@ glusterd_get_global_options_for_all_vols(rpcsvc_request_t *req, dict_t *ctx,
         if (key_fixed)
             key = key_fixed;
     }
-
+    /* coverity[CONSTANT_EXPRESSION_RESULT] */
     ALL_VOLUME_OPTION_CHECK("all", _gf_true, key, ret, op_errstr, out);
 
     for (i = 0; valid_all_vol_opts[i].option; i++) {
@@ -13904,6 +13908,7 @@ glusterd_disallow_op_for_tier(glusterd_volinfo_t *volinfo, glusterd_op_t op,
             break;
         case GD_OP_REMOVE_BRICK:
             switch (cmd) {
+                /* coverity[MIXED_ENUMS] */
                 case GF_DEFRAG_CMD_DETACH_START:
                 case GF_OP_CMD_DETACH_COMMIT_FORCE:
                 case GF_OP_CMD_DETACH_COMMIT:
diff --git a/xlators/mgmt/glusterd/src/glusterd-volgen.c b/xlators/mgmt/glusterd/src/glusterd-volgen.c
index 0d5a5ccab5e..c8b6875f7db 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volgen.c
+++ b/xlators/mgmt/glusterd/src/glusterd-volgen.c
@@ -323,7 +323,7 @@ volopt_trie_cbk(char *word, void *param)
 }
 
 static int
-process_nodevec(struct trienodevec *nodevec, char **hint)
+process_nodevec(struct trienodevec *nodevec, char **outputhint, char *inputhint)
 {
     int ret = 0;
     char *hint1 = NULL;
@@ -332,14 +332,14 @@ process_nodevec(struct trienodevec *nodevec, char **hint)
     trienode_t **nodes = nodevec->nodes;
 
     if (!nodes[0]) {
-        *hint = NULL;
+        *outputhint = NULL;
         return 0;
     }
 
 #if 0
         /* Limit as in git */
         if (trienode_get_dist (nodes[0]) >= 6) {
-                *hint = NULL;
+                *outputhint = NULL;
                 return 0;
         }
 #endif
@@ -348,23 +348,30 @@ process_nodevec(struct trienodevec *nodevec, char **hint)
         return -1;
 
     if (nodevec->cnt < 2 || !nodes[1]) {
-        *hint = hint1;
+        *outputhint = hint1;
         return 0;
     }
 
-    if (trienode_get_word(nodes[1], &hint2))
+    if (trienode_get_word(nodes[1], &hint2)) {
+        GF_FREE(hint1);
         return -1;
+    }
 
-    if (*hint)
-        hintinfx = *hint;
-    ret = gf_asprintf(hint, "%s or %s%s", hint1, hintinfx, hint2);
+    if (inputhint)
+        hintinfx = inputhint;
+    ret = gf_asprintf(outputhint, "%s or %s%s", hint1, hintinfx, hint2);
     if (ret > 0)
         ret = 0;
+    if (hint1)
+        GF_FREE(hint1);
+    if (hint2)
+        GF_FREE(hint2);
     return ret;
 }
 
 static int
-volopt_trie_section(int lvl, char **patt, char *word, char **hint, int hints)
+volopt_trie_section(int lvl, char **patt, char *word, char **outputhint,
+                    char *inputhint, int hints)
 {
     trienode_t *nodes[] = {NULL, NULL};
     struct trienodevec nodevec = {nodes, 2};
@@ -385,7 +392,7 @@ volopt_trie_section(int lvl, char **patt, char *word, char **hint, int hints)
     nodevec.cnt = hints;
     ret = trie_measure_vec(trie, word, &nodevec);
     if (!ret && nodevec.nodes[0])
-        ret = process_nodevec(&nodevec, hint);
+        ret = process_nodevec(&nodevec, outputhint, inputhint);
 
     trie_destroy(trie);
 
@@ -397,6 +404,7 @@ volopt_trie(char *key, char **hint)
 {
     char *patt[] = {NULL};
     char *fullhint = NULL;
+    char *inputhint = NULL;
     char *dot = NULL;
     char *dom = NULL;
     int len = 0;
@@ -406,7 +414,7 @@ volopt_trie(char *key, char **hint)
 
     dot = strchr(key, '.');
     if (!dot)
-        return volopt_trie_section(1, patt, key, hint, 2);
+        return volopt_trie_section(1, patt, key, hint, inputhint, 2);
 
     len = dot - key;
     dom = gf_strdup(key);
@@ -414,7 +422,7 @@ volopt_trie(char *key, char **hint)
         return -1;
     dom[len] = '\0';
 
-    ret = volopt_trie_section(0, NULL, dom, patt, 1);
+    ret = volopt_trie_section(0, NULL, dom, patt, inputhint, 1);
     GF_FREE(dom);
     if (ret) {
         patt[0] = NULL;
@@ -423,8 +431,8 @@ volopt_trie(char *key, char **hint)
     if (!patt[0])
         goto out;
 
-    *hint = "...";
-    ret = volopt_trie_section(1, patt, dot + 1, hint, 2);
+    inputhint = "...";
+    ret = volopt_trie_section(1, patt, dot + 1, hint, inputhint, 2);
     if (ret)
         goto out;
     if (*hint) {