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>

2 files changed, 18 insertions, 0 deletions

diff --git a/xlators/mount/fuse/utils/mount.glusterfs.in b/xlators/mount/fuse/utils/mount.glusterfs.in
index 826991ba402..216d03c4182 100755
--- a/xlators/mount/fuse/utils/mount.glusterfs.in
+++ b/xlators/mount/fuse/utils/mount.glusterfs.in
@@ -257,6 +257,12 @@ start_glusterfs ()
         cmd_line=$(echo "$cmd_line --xlator-option=$xlator_option");
     fi
 
+    if [ -n "$process_name" ]; then
+        cmd_line=$(echo "$cmd_line --process-name fuse.$process_name");
+    else
+        cmd_line=$(echo "$cmd_line --process-name fuse");
+    fi
+
     # if trasnport type is specified, we have to append it to
     # volume name, so that it fetches the right client vol file
 
@@ -510,6 +516,9 @@ with_options()
         "halo-min-replicas")
           halo_min_replicas=$value
           ;;
+        "process-name")
+            process_name=$value
+            ;;
         x-*)
             # comments or userspace application-specific options, drop them
             ;;
diff --git a/xlators/mount/fuse/utils/mount_glusterfs.in b/xlators/mount/fuse/utils/mount_glusterfs.in
index eca84557e87..d3571dea706 100755
--- a/xlators/mount/fuse/utils/mount_glusterfs.in
+++ b/xlators/mount/fuse/utils/mount_glusterfs.in
@@ -234,6 +234,12 @@ start_glusterfs ()
         cmd_line=$(echo "$cmd_line --xlator-option=$xlator_option");
     fi
 
+    if [ -n "$process_name" ]; then
+        cmd_line=$(echo "$cmd_line --process-name fuse.$process_name");
+    else
+        cmd_line=$(echo "$cmd_line --process-name fuse");
+    fi
+
     # for rdma volume, we have to fetch volfile with '.rdma' added
     # to volume name, so that it fetches the right client vol file
     volume_id_rdma="";
@@ -398,6 +404,9 @@ with_options()
                 [ $value = "false" ] ; then
                 no_root_squash=1;
             fi ;;
+        "process-name")
+            process_name=$value
+            ;;
         *)
             warn "Invalid option: $key"
             exit 1