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>

2 files changed, 88 insertions, 1 deletions

diff --git a/glusterfsd/src/glusterfsd-messages.h b/glusterfsd/src/glusterfsd-messages.h
index 1e1d170e48a..7bf1a3fb5b3 100644
--- a/glusterfsd/src/glusterfsd-messages.h
+++ b/glusterfsd/src/glusterfsd-messages.h
@@ -41,7 +41,7 @@
  */
 
 #define GLFS_COMP_BASE          GLFS_MSGID_COMP_GLUSTERFSD
-#define GLFS_NUM_MESSAGES       34
+#define GLFS_NUM_MESSAGES       36
 #define GLFS_MSGID_END          (GLFS_COMP_BASE + GLFS_NUM_MESSAGES + 1)
 /* Messaged with message IDs */
 #define glfs_msg_start_x GLFS_COMP_BASE, "Invalid: Start of messages"
@@ -109,6 +109,10 @@
                         "was provided"
 #define glusterfsd_msg_34 (GLFS_COMP_BASE + 34), "memory accounting init" \
                         " failed."
+#define glusterfsd_msg_35 (GLFS_COMP_BASE + 35), "rpc req buffer " \
+                        " unserialization failed."
+#define glusterfsd_msg_36 (GLFS_COMP_BASE + 36), "problem in xlator " \
+                        " loading."
 /*------------*/
 #define glfs_msg_end_x GLFS_MSGID_END, "Invalid: End of messages"
 
diff --git a/glusterfsd/src/glusterfsd-mgmt.c b/glusterfsd/src/glusterfsd-mgmt.c
index 8fe7f1b8563..d3d79797cbf 100644
--- a/glusterfsd/src/glusterfsd-mgmt.c
+++ b/glusterfsd/src/glusterfsd-mgmt.c
@@ -26,6 +26,7 @@
 
 #include "rpc-clnt.h"
 #include "protocol-common.h"
+#include "glusterfsd-messages.h"
 #include "glusterfs3.h"
 #include "portmap-xdr.h"
 #include "xdr-generic.h"
@@ -645,6 +646,87 @@ out:
         return 0;
 }
 
+int
+glusterfs_handle_bitrot (rpcsvc_request_t *req)
+{
+        int32_t                  ret          = -1;
+        gd1_mgmt_brick_op_req    xlator_req   = {0,};
+        dict_t                   *input       = NULL;
+        dict_t                   *output      = NULL;
+        xlator_t                 *any         = NULL;
+        xlator_t                 *this        = NULL;
+        xlator_t                 *xlator      = NULL;
+        char                     msg[2048]    = {0,};
+        char                     xname[1024]  = {0,};
+        glusterfs_ctx_t          *ctx         = NULL;
+        glusterfs_graph_t        *active      = NULL;
+
+        GF_ASSERT (req);
+        this = THIS;
+        GF_ASSERT (this);
+
+        ret = xdr_to_generic (req->msg[0], &xlator_req,
+                             (xdrproc_t)xdr_gd1_mgmt_brick_op_req);
+
+        if (ret < 0) {
+                /*failed to decode msg;*/
+                req->rpc_err = GARBAGE_ARGS;
+                goto out;
+        }
+
+        ctx = glusterfsd_ctx;
+        GF_ASSERT (ctx);
+
+        active = ctx->active;
+        if (!active) {
+                req->rpc_err = GARBAGE_ARGS;
+                goto out;
+        }
+
+        any = active->first;
+
+        input = dict_new ();
+        if (!input)
+                goto out;
+
+        ret = dict_unserialize (xlator_req.input.input_val,
+                                xlator_req.input.input_len,
+                                &input);
+
+        if (ret < 0) {
+                gf_msg (this->name, GF_LOG_ERROR, 0, glusterfsd_msg_35);
+                goto out;
+        }
+
+        /* Send scrubber request to bitrot xlator */
+        snprintf (xname, sizeof (xname), "%s-bit-rot-0", xlator_req.name);
+        xlator = xlator_search_by_name (any, xname);
+        if (!xlator) {
+                snprintf (msg, sizeof (msg), "xlator %s is not loaded", xname);
+                gf_msg (this->name, GF_LOG_ERROR, 0, glusterfsd_msg_36);
+                goto out;
+        }
+
+        output = dict_new ();
+        if (!output) {
+                ret = -1;
+                goto out;
+        }
+
+        ret = xlator->notify (xlator, GF_EVENT_SCRUB_STATUS, input,
+                              output);
+out:
+        glusterfs_translator_info_response_send (req, ret, msg, output);
+
+        if (input)
+                dict_unref (input);
+        free (xlator_req.input.input_val); /*malloced by xdr*/
+        if (output)
+                dict_unref (output);
+        free (xlator_req.name);
+
+        return 0;
+}
 
 int
 glusterfs_handle_defrag (rpcsvc_request_t *req)
@@ -1398,6 +1480,7 @@ rpcsvc_actor_t glusterfs_actors[GLUSTERD_BRICK_MAXVALUE] = {
         [GLUSTERD_NODE_STATUS]         = {"NFS STATUS",        GLUSTERD_NODE_STATUS,         glusterfs_handle_node_status,         NULL, 0, DRC_NA},
         [GLUSTERD_VOLUME_BARRIER_OP]   = {"VOLUME BARRIER OP", GLUSTERD_VOLUME_BARRIER_OP,   glusterfs_handle_volume_barrier_op,   NULL, 0, DRC_NA},
         [GLUSTERD_BRICK_BARRIER]       = {"BARRIER",           GLUSTERD_BRICK_BARRIER,       glusterfs_handle_barrier,             NULL, 0, DRC_NA},
+        [GLUSTERD_NODE_BITROT]         = {"BITROT",            GLUSTERD_NODE_BITROT,         glusterfs_handle_bitrot,              NULL, 0, DRC_NA},
 };
 
 struct rpcsvc_program glusterfs_mop_prog = {