tipc: add link monitor summary

The monitor summary command prints the basic attributes
specific to the local node.
A sample usage is shown below:
$ tipc link monitor summary
bearer eth:data0
    table_generation 15
    cluster_size 8
    algorithm overlapping-ring

bearer eth:data1
    table_generation 15
    cluster_size 8
    algorithm overlapping-ring

$ tipc link monitor summary -h
Usage: tipc monitor summary

Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Tested-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>

diff --git a/tipc/link.c b/tipc/link.c
index 3f0c3210677295f1b9b875d70fe6108769918e44..df93409f2173c2547dfbdc5e5d7172a8a0b78f63 100644 (file)
--- a/tipc/link.c
+++ b/tipc/link.c
@@ -515,6 +515,49 @@ static int cmd_link_mon_set_prop(struct nlmsghdr *nlh, const struct cmd *cmd,
        return msg_doit(nlh, NULL, NULL);
 }
 
+static int link_mon_summary_cb(const struct nlmsghdr *nlh, void *data)
+{
+       struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
+       struct nlattr *info[TIPC_NLA_MAX + 1] = {};
+       struct nlattr *attrs[TIPC_NLA_MON_MAX + 1] = {};
+
+       mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
+       if (!info[TIPC_NLA_MON])
+               return MNL_CB_ERROR;
+
+       mnl_attr_parse_nested(info[TIPC_NLA_MON], parse_attrs, attrs);
+
+       printf("\nbearer %s\n",
+               mnl_attr_get_str(attrs[TIPC_NLA_MON_BEARER_NAME]));
+
+       printf("    table_generation %u\n",
+              mnl_attr_get_u32(attrs[TIPC_NLA_MON_LISTGEN]));
+       printf("    cluster_size %u\n",
+               mnl_attr_get_u32(attrs[TIPC_NLA_MON_PEERCNT]));
+       printf("    algorithm %s\n",
+               attrs[TIPC_NLA_MON_ACTIVE] ? "overlapping-ring" : "full-mesh");
+
+       return MNL_CB_OK;
+}
+
+static int cmd_link_mon_summary(struct nlmsghdr *nlh, const struct cmd *cmd,
+                               struct cmdl *cmdl, void *data)
+{
+       char buf[MNL_SOCKET_BUFFER_SIZE];
+
+       if (help_flag) {
+               fprintf(stderr, "Usage: %s monitor summary\n", cmdl->argv[0]);
+               return -EINVAL;
+       }
+
+       if (!(nlh = msg_init(buf, TIPC_NL_MON_GET))) {
+               fprintf(stderr, "error, message initialisation failed\n");
+               return -1;
+       }
+
+       return msg_dumpit(nlh, link_mon_summary_cb, NULL);
+}
+
 static void cmd_link_mon_set_help(struct cmdl *cmdl)
 {
        fprintf(stderr, "Usage: %s monitor set PPROPERTY\n\n"
@@ -592,7 +635,8 @@ static void cmd_link_mon_help(struct cmdl *cmdl)
                "Usage: %s montior COMMAND [ARGS] ...\n\n"
                "COMMANDS\n"
                " set                   - Set monitor properties\n"
-               " get                   - Get monitor properties\n",
+               " get                   - Get monitor properties\n"
+               " summary               - Show local node monitor summary\n",
                cmdl->argv[0]);
 }
 
@@ -602,6 +646,7 @@ static int cmd_link_mon(struct nlmsghdr *nlh, const struct cmd *cmd, struct cmdl
        const struct cmd cmds[] = {
                { "set",        cmd_link_mon_set,       cmd_link_mon_set_help },
                { "get",        cmd_link_mon_get,       cmd_link_mon_get_help },
+               { "summary",    cmd_link_mon_summary,   NULL },
                { NULL }
        };