Infra to indentify process

Problem: currently we can't identify which process is running and
how many instances of it are available.

Fix: name the process when its spawned and send it to the server
and save it in the client_t

The processes that abide by this change from this patch are:
1) fuse mount,
2) rebalance,
3) selfheal,
4) tier,
5) quota,
6) snapshot,
7) brick.
8) gfapi (by default. gfapi.<processname> if processname is found)

Note: fuse gets a process name as native-fuse-client by default.
If the user gives a name for the fuse and spawns it, it will be of
this type --process-name native-fuse-client.<name_specified>.
This can be made use by the process like aux mount done by quota,
geo-rep, etc by adding another option in the aux mount " -o
process-name=gsync_mount"

Updates: #178
Signed-off-by: hari gowtham <hgowtham@redhat.com>
Change-Id: Ie4d02257216839338043737691753bab9a974d5e
Reviewed-on: https://review.gluster.org/17957
Smoke: Gluster Build System <jenkins@build.gluster.org>
Tested-by: hari gowtham <hari.gowtham005@gmail.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Atin Mukherjee <amukherj@redhat.com>
Reviewed-by: Aravinda VK <avishwan@redhat.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/xlators/protocol/server/src/server-handshake.c b/xlators/protocol/server/src/server-handshake.c
index fa2f61315df..6dc9a38aa71 100644
--- a/xlators/protocol/server/src/server-handshake.c
+++ b/xlators/protocol/server/src/server-handshake.c
@@ -475,6 +475,7 @@ server_setvolume (rpcsvc_request_t *req)
         glusterfs_ctx_t     *ctx           = NULL;
         struct  _child_status *tmp         = NULL;
         char                *subdir_mount  = NULL;
+        char                *client_name   = NULL;
 
         params = dict_new ();
         reply  = dict_new ();
@@ -609,6 +610,10 @@ server_setvolume (rpcsvc_request_t *req)
         if (ret < 0) {
                 /* Not a problem at all as the key is optional */
         }
+        ret = dict_get_str (params, "process-name", &client_name);
+        if (ret < 0) {
+                client_name = "unknown";
+        }
 
         /*lk_verion :: [1..2^31-1]*/
         ret = dict_get_uint32 (params, "clnt-lk-version", &lk_version);
@@ -631,6 +636,8 @@ server_setvolume (rpcsvc_request_t *req)
                 goto fail;
         }
 
+        client->client_name = gf_strdup(client_name);
+
         gf_msg_debug (this->name, 0, "Connected to %s", client->client_uid);
         cancelled = server_cancel_grace_timer (this, client);
         if (cancelled)//Do gf_client_put on behalf of grace-timer-handler.