glusterd: cli command implementation for bitrot scrub status

This patch is backport of: http://review.gluster.org/10231

CLI command  for bitrot scrub status will be :

gluster volume bitrot <volname> scrub status

Above command will show the statistics of bitrot scrubber.

Upon execution of this command it will show some common
scrubber tunable value of volume <VOLNAME> followed by
statistics of scrubber statistics of individual nodes.

sample ouput for single node:

Volume name : <VOLNAME>

State of scrub: Active

Scrub frequency: biweekly

Bitrot error log location: /var/log/glusterfs/bitd.log

Scrubber error log location: /var/log/glusterfs/scrub.log

=========================================================

Node name:

Number of Scrubbed files:

Number of Unsigned files:

Last completed scrub time:

Duration of last scrub:

Error count:

=========================================================

This is just infrastructure. list of bad file, last scrub
time, error count value will be taken care by
http://review.gluster.org/#/c/12503/  and
http://review.gluster.org/#/c/12654/ patches.

    >> Change-Id: I3ed3c7057c9d0c894233f4079a7f185d90c202d1
    >> BUG: 1207627
    >> Signed-off-by: Gaurav Kumar Garg <ggarg@redhat.com>
    >> Reviewed-on: http://review.gluster.org/10231
    >> Reviewed-by: Atin Mukherjee <amukherj@redhat.com>
    >> Tested-by: NetBSD Build System <jenkins@build.gluster.org>
    >> Tested-by: Gluster Build System <jenkins@build.gluster.com>

Change-Id: I45ed94e5e0e78a1e007c30eb0b252f74cf3c9187
BUG: 1283881
Signed-off-by: Gaurav Kumar Garg <ggarg@redhat.com>
Reviewed-on: http://review.gluster.org/12704
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Atin Mukherjee <amukherj@redhat.com>

1 files changed, 38 insertions, 8 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-bitrot.c b/xlators/mgmt/glusterd/src/glusterd-bitrot.c
index 897916ed860..2e0fb17d2b6 100644
--- a/xlators/mgmt/glusterd/src/glusterd-bitrot.c
+++ b/xlators/mgmt/glusterd/src/glusterd-bitrot.c
@@ -44,15 +44,16 @@ const char *gd_bitrot_op_list[GF_BITROT_OPTION_TYPE_MAX] = {
 int
 __glusterd_handle_bitrot (rpcsvc_request_t *req)
 {
-        int32_t                         ret = -1;
-        gf_cli_req                      cli_req = { {0,} };
-        dict_t                         *dict = NULL;
-        glusterd_op_t                   cli_op = GD_OP_BITROT;
-        char                           *volname = NULL;
-        int32_t                         type = 0;
+        int32_t                         ret       = -1;
+        gf_cli_req                      cli_req   = { {0,} };
+        dict_t                         *dict      = NULL;
+        glusterd_op_t                   cli_op    = GD_OP_BITROT;
+        char                           *volname   = NULL;
+        char                           *scrub     = NULL;
+        int32_t                         type      = 0;
         char                            msg[2048] = {0,};
-        xlator_t                       *this = NULL;
-        glusterd_conf_t                *conf = NULL;
+        xlator_t                       *this      = NULL;
+        glusterd_conf_t                *conf      = NULL;
 
         GF_ASSERT (req);
 
@@ -114,6 +115,34 @@ __glusterd_handle_bitrot (rpcsvc_request_t *req)
                 goto out;
         }
 
+        if (type == GF_BITROT_CMD_SCRUB_STATUS) {
+                /* Backward compatibility handling for scrub status command*/
+                if (conf->op_version < GD_OP_VERSION_3_7_7) {
+                        snprintf (msg, sizeof (msg), "Cannot execute command. "
+                                  "The cluster is operating at version %d. "
+                                  "Bitrot scrub status command unavailable in "
+                                  "this version", conf->op_version);
+                        ret = -1;
+                        goto out;
+                }
+
+                ret = dict_get_str (dict, "scrub-value", &scrub);
+                if (ret) {
+                        gf_msg (this->name, GF_LOG_ERROR, 0,
+                                GD_MSG_DICT_GET_FAILED,
+                                "Failed to get scrub value.");
+                        ret = -1;
+                        goto out;
+                }
+
+                if (!strncmp (scrub, "status", strlen ("status"))) {
+                        ret = glusterd_op_begin_synctask (req,
+                                                          GD_OP_SCRUB_STATUS,
+                                                          dict);
+                        goto out;
+                }
+        }
+
         ret = glusterd_op_begin_synctask (req, GD_OP_BITROT, dict);
 
 out:
@@ -547,6 +576,7 @@ glusterd_op_bitrot (dict_t *dict, char **op_errstr, dict_t *rsp_dict)
                                                    op_errstr);
                 if (ret)
                         goto out;
+        case GF_BITROT_CMD_SCRUB_STATUS:
                 break;
 
         default: