glusterd: Add info on op-version for clients in vol status output

Currently the `gluster volume status <VOLNAME|all> clients` command
gives us the following information on clients:
1. Brick name
2. Client count for each brick
3. hostname:port for each client
4. Bytes read and written for each client

There is no information regarding op-version for each client. This
patch adds that to the output.

Change-Id: Ib2ece93ab00c234162bb92b7c67a7d86f3350a8d
BUG: 1409078
Signed-off-by: Samikshan Bairagya <samikshan@gmail.com>
Reviewed-on: http://review.gluster.org/16303
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Atin Mukherjee <amukherj@redhat.com>

4 files changed, 42 insertions, 1 deletions

diff --git a/xlators/protocol/client/src/client-handshake.c b/xlators/protocol/client/src/client-handshake.c
index adccd8d4e51..354b9167810 100644
--- a/xlators/protocol/client/src/client-handshake.c
+++ b/xlators/protocol/client/src/client-handshake.c
@@ -1387,6 +1387,12 @@ client_setvolume (xlator_t *this, struct rpc_clnt *rpc)
                         "msg", client_get_lk_ver (conf));
         }
 
+        ret = dict_set_int32 (options, "opversion", GD_OP_VERSION_MAX);
+        if (ret < 0) {
+                gf_msg (this->name, GF_LOG_ERROR, 0, PC_MSG_DICT_SET_FAILED,
+                        "Failed to set client opversion in handshake message");
+        }
+
         ret = dict_serialized_length (options);
         if (ret < 0) {
                 gf_msg (this->name, GF_LOG_ERROR, 0, PC_MSG_DICT_ERROR,
diff --git a/xlators/protocol/server/src/server-handshake.c b/xlators/protocol/server/src/server-handshake.c
index 1230cdf7ab5..a33efb8c33a 100644
--- a/xlators/protocol/server/src/server-handshake.c
+++ b/xlators/protocol/server/src/server-handshake.c
@@ -431,6 +431,8 @@ server_setvolume (rpcsvc_request_t *req)
         uint32_t             lk_version    = 0;
         char                *buf           = NULL;
         gf_boolean_t        cancelled      = _gf_false;
+        uint32_t            opversion      = 0;
+        rpc_transport_t     *xprt          = NULL;
 
         params = dict_new ();
         reply  = dict_new ();
@@ -669,6 +671,22 @@ server_setvolume (rpcsvc_request_t *req)
                         gf_msg_debug (this->name, 0, "failed to set "
                                       "peer-info");
         }
+
+        ret = dict_get_uint32 (params, "opversion", &opversion);
+        if (ret)
+                gf_msg (this->name, GF_LOG_INFO, 0,
+                        PS_MSG_CLIENT_OPVERSION_GET_FAILED,
+                        "Failed to get client opversion");
+
+        /* Assign op-version value to the client */
+        pthread_mutex_lock (&conf->mutex);
+        list_for_each_entry (xprt, &conf->xprt_list, list) {
+                if (strcmp (peerinfo->identifier, xprt->peerinfo.identifier))
+                        continue;
+                xprt->peerinfo.max_op_version = opversion;
+        }
+        pthread_mutex_unlock (&conf->mutex);
+
         if (conf->auth_modules == NULL) {
                 gf_msg (this->name, GF_LOG_ERROR, 0, PS_MSG_AUTH_INIT_FAILED,
                         "Authentication module not initialized");
diff --git a/xlators/protocol/server/src/server-messages.h b/xlators/protocol/server/src/server-messages.h
index 5593e68d3d4..b8245af18df 100644
--- a/xlators/protocol/server/src/server-messages.h
+++ b/xlators/protocol/server/src/server-messages.h
@@ -40,7 +40,7 @@
  */
 
 #define GLFS_PS_BASE                GLFS_MSGID_COMP_PS
-#define GLFS_NUM_MESSAGES           90
+#define GLFS_NUM_MESSAGES           91
 #define GLFS_MSGID_END              (GLFS_PS_BASE + GLFS_NUM_MESSAGES + 1)
 /* Messages with message IDs */
 #define glfs_msg_start_x GLFS_PS_BASE, "Invalid: Start of messages"
@@ -848,6 +848,15 @@
  */
 
 #define PS_MSG_COMPOUND_INFO                    (GLFS_PS_BASE + 90)
+
+/*!
+ * @messageid
+ * @diagnosis
+ * @recommendedaction
+ *
+ */
+
+#define PS_MSG_CLIENT_OPVERSION_GET_FAILED      (GLFS_PS_BASE + 91)
 /*------------*/
 #define glfs_msg_end_x GLFS_MSGID_END, "Invalid: End of messages"
 
diff --git a/xlators/protocol/server/src/server.c b/xlators/protocol/server/src/server.c
index af3adb36ef2..db2f06ad582 100644
--- a/xlators/protocol/server/src/server.c
+++ b/xlators/protocol/server/src/server.c
@@ -275,6 +275,14 @@ server_priv_to_dict (xlator_t *this, dict_t *dict)
                         if (ret)
                                 goto unlock;
 
+                        memset (key, 0, sizeof (key));
+                        snprintf (key, sizeof (key), "client%d.opversion",
+                                  count);
+                        ret = dict_set_uint32 (dict, key,
+                                               peerinfo->max_op_version);
+                        if (ret)
+                                goto unlock;
+
                         count++;
                 }
         }