cli: Extend "volume status" with statedump info

This patch enhances and extends the "volume status" command with information
obtained from the statedump of the bricks of volumes.

Adds new status types : clients, inode, fd, mem, callpool
The new syntax of "volume status" is,
 #gluster volume status [all|{<volname> [<brickname>]
                         [misc-details|clients|inode|fd|mem|callpool]}]

Change-Id: I8d019718465bbc3de727653a839de7238f45da5c
BUG: 765495
Signed-off-by: Kaushal M <kaushal@redhat.com>
Reviewed-on: http://review.gluster.com/2637
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Krishnan Parthasarathi <kp@gluster.com>

1 files changed, 92 insertions, 0 deletions

diff --git a/libglusterfs/src/fd.c b/libglusterfs/src/fd.c
index 50a564ee6..62a70c457 100644
--- a/libglusterfs/src/fd.c
+++ b/libglusterfs/src/fd.c
@@ -905,3 +905,95 @@ out:
 
         return;
 }
+
+void
+fdentry_dump_to_dict (fdentry_t *fdentry, char *prefix, dict_t *dict,
+                      int *openfds)
+{
+        char    key[GF_DUMP_MAX_BUF_LEN] = {0,};
+        int     ret = -1;
+
+        if (!fdentry)
+                return;
+        if (!dict)
+                return;
+
+        if (GF_FDENTRY_ALLOCATED != fdentry->next_free)
+                return;
+
+        if (fdentry->fd) {
+                memset (key, 0, sizeof (key));
+                snprintf (key, sizeof (key), "%s.pid", prefix);
+                ret = dict_set_int32 (dict, key, fdentry->fd->pid);
+                if (ret)
+                        return;
+
+                memset (key, 0, sizeof (key));
+                snprintf (key, sizeof (key), "%s.refcount", prefix);
+                ret = dict_set_int32 (dict, key, fdentry->fd->refcount);
+                if (ret)
+                        return;
+
+                memset (key, 0, sizeof (key));
+                snprintf (key, sizeof (key), "%s.flags", prefix);
+                ret = dict_set_int32 (dict, key, fdentry->fd->flags);
+
+                (*openfds)++;
+        }
+        return;
+}
+
+void
+fdtable_dump_to_dict (fdtable_t *fdtable, char *prefix, dict_t *dict)
+{
+        char    key[GF_DUMP_MAX_BUF_LEN] = {0,};
+        int     i = 0;
+        int     openfds = 0;
+        int     ret = -1;
+
+        if (!fdtable)
+                return;
+        if (!dict)
+                return;
+
+        ret = pthread_mutex_trylock (&fdtable->lock);
+        if (ret)
+                goto out;
+
+        memset (key, 0, sizeof (key));
+        snprintf (key, sizeof (key), "%s.fdtable.refcount", prefix);
+        ret = dict_set_int32 (dict, key, fdtable->refcount);
+        if (ret)
+                goto out;
+
+        memset (key, 0, sizeof (key));
+        snprintf (key, sizeof (key), "%s.fdtable.maxfds", prefix);
+        ret = dict_set_uint32 (dict, key, fdtable->max_fds);
+        if (ret)
+                goto out;
+
+        memset (key, 0, sizeof (key));
+        snprintf (key, sizeof (key), "%s.fdtable.firstfree", prefix);
+        ret = dict_set_int32 (dict, key, fdtable->first_free);
+        if (ret)
+                goto out;
+
+        for (i = 0; i < fdtable->max_fds; i++) {
+                if (GF_FDENTRY_ALLOCATED ==
+                    fdtable->fdentries[i].next_free) {
+                        memset (key, 0, sizeof (key));
+                        snprintf (key, sizeof (key), "%s.fdtable.fdentry%d",
+                                  prefix, i);
+                        fdentry_dump_to_dict (&fdtable->fdentries[i], key,
+                                              dict, &openfds);
+                }
+        }
+
+        memset (key, 0, sizeof (key));
+        snprintf (key, sizeof (key), "%s.fdtable.openfds", prefix);
+        ret = dict_set_int32 (dict, key, openfds);
+
+out:
+        pthread_mutex_unlock (&fdtable->lock);
+        return;
+}