In this commit, we list the monitor attributes for the specified
bearer.
A sample usage is shown below:
$ tipc link monitor list media eth dev data0
node          status monitored domain_generation applied_node_status 
[non_applied_node:status]
1.1.1         up     direct    3                 UU []
1.1.2         up     direct    2                 UU []
1.1.3         up     direct    4                 UU []
1.1.4         up     direct    4                 UU []
1.1.5         up     indirect  5                 UU []
1.1.6         up     indirect  4                 UU []
1.1.7         up     direct    5                 UU []
1.1.8         up     indirect  3                 UU []

$ tipc link monitor list -h
Usage: tipc monitor list media MEDIA ARGS...

MEDIA
 udp                   - User Datagram Protocol
 ib                    - Infiniband
 eth                   - Ethernet

Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvara...@ericsson.com>
---
v2: improve output formatting
---
 tipc/link.c | 212 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 212 insertions(+)

diff --git a/tipc/link.c b/tipc/link.c
index b4ff164c779d..c41a698db6f9 100644
--- a/tipc/link.c
+++ b/tipc/link.c
@@ -22,6 +22,7 @@
 #include "cmdl.h"
 #include "msg.h"
 #include "link.h"
+#include "bearer.h"
 
 static int link_list_cb(const struct nlmsghdr *nlh, void *data)
 {
@@ -558,6 +559,215 @@ static int cmd_link_mon_summary(struct nlmsghdr *nlh, 
const struct cmd *cmd,
        return msg_dumpit(nlh, link_mon_summary_cb, NULL);
 }
 
+#define STATUS_WIDTH 7
+#define MAX_NODE_WIDTH 14 /* 255.4095.4095 */
+#define MAX_DOM_GEN_WIDTH 18 /* 65535 */
+#define DIRECTLY_MON_WIDTH 10
+
+#define APPL_NODE_STATUS_WIDTH 5
+
+static int map_get(uint64_t up_map, int i)
+{
+       return (up_map & (1 << i)) >> i;
+}
+
+/* print the applied members, since we know the the members
+ * are listed in ascending order, we print only the state */
+static void link_mon_print_applied(uint16_t applied, uint64_t up_map)
+{
+       int i;
+       char state;
+
+       for (i = 0; i < applied; i++) {
+               /* print the delimiter for every -n- entry */
+               if (i && !(i % APPL_NODE_STATUS_WIDTH))
+                       printf(",");
+
+               state = map_get(up_map, i) ? 'U' : 'D';
+               printf("%c", state);
+       }
+}
+
+/* print the non applied members, since we dont know
+ * the members, we print them along with the state */
+static void link_mon_print_non_applied(uint16_t applied, uint16_t member_cnt,
+                                      uint64_t up_map,  uint32_t *members)
+{
+       int i;
+       char state;
+
+       printf(" [");
+       for (i = applied; i < member_cnt; i++) {
+               char addr_str[16];
+
+               /* print the delimiter for every entry */
+               if (i != applied)
+                       printf(",");
+
+               sprintf(addr_str, "%u.%u.%u:", tipc_zone(members[i]),
+                       tipc_cluster(members[i]), tipc_node(members[i]));
+               state = map_get(up_map, i) ? 'U' : 'D';
+               printf("%s%c", addr_str, state);
+       }
+       printf("]");
+}
+
+static void link_mon_print_peer_state(const uint32_t addr, const char *status,
+                                     const char *monitored,
+                                     const uint32_t dom_gen)
+{
+       char addr_str[16];
+
+       sprintf(addr_str, "%u.%u.%u", tipc_zone(addr), tipc_cluster(addr),
+               tipc_node(addr));
+
+       printf("%-*s", MAX_NODE_WIDTH, addr_str);
+       printf("%-*s", STATUS_WIDTH, status);
+       printf("%-*s", DIRECTLY_MON_WIDTH, monitored);
+       printf("%-*u", MAX_DOM_GEN_WIDTH, dom_gen);
+}
+
+static int link_mon_peer_list_cb(const struct nlmsghdr *nlh, void *data)
+{
+       struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
+       struct nlattr *attrs[TIPC_NLA_MON_PEER_MAX + 1] = {};
+       struct nlattr *info[TIPC_NLA_MAX + 1] = {};
+       uint16_t member_cnt;
+       uint32_t applied;
+       uint32_t dom_gen;
+       uint64_t up_map;
+       char status[16];
+       char monitored[16];
+
+       mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
+       if (!info[TIPC_NLA_MON_PEER])
+               return MNL_CB_ERROR;
+
+       mnl_attr_parse_nested(info[TIPC_NLA_MON_PEER], parse_attrs, attrs);
+
+       (attrs[TIPC_NLA_MON_PEER_LOCAL] || attrs[TIPC_NLA_MON_PEER_HEAD]) ?
+               strcpy(monitored, "direct") :
+               strcpy(monitored, "indirect");
+
+       attrs[TIPC_NLA_MON_PEER_UP] ?
+               strcpy(status, "up") :
+               strcpy(status, "down");
+
+       dom_gen = attrs[TIPC_NLA_MON_PEER_DOMGEN] ?
+                       mnl_attr_get_u32(attrs[TIPC_NLA_MON_PEER_DOMGEN]) : 0;
+
+       
link_mon_print_peer_state(mnl_attr_get_u32(attrs[TIPC_NLA_MON_PEER_ADDR]),
+                                                  status, monitored, dom_gen);
+
+       applied = mnl_attr_get_u32(attrs[TIPC_NLA_MON_PEER_APPLIED]);
+
+       if (!applied)
+               goto exit;
+
+       up_map = mnl_attr_get_u64(attrs[TIPC_NLA_MON_PEER_UPMAP]);
+
+       member_cnt = mnl_attr_get_payload_len(attrs[TIPC_NLA_MON_PEER_MEMBERS]);
+
+       /* each tipc address occupies 4 bytes of payload, hence compensate it */
+       member_cnt /= sizeof(uint32_t);
+
+       link_mon_print_applied(applied, up_map);
+
+       link_mon_print_non_applied(applied, member_cnt, up_map,
+                                  
mnl_attr_get_payload(attrs[TIPC_NLA_MON_PEER_MEMBERS]));
+
+exit:
+       printf("\n");
+
+       return MNL_CB_OK;
+}
+
+static int link_mon_peer_list(uint32_t mon_ref)
+{
+       struct nlmsghdr *nlh;
+       char buf[MNL_SOCKET_BUFFER_SIZE];
+       struct nlattr *nest;
+
+       if (!(nlh = msg_init(buf, TIPC_NL_MON_PEER_GET))) {
+               fprintf(stderr, "error, message initialisation failed\n");
+               return -1;
+       }
+
+       nest = mnl_attr_nest_start(nlh, TIPC_NLA_MON);
+       mnl_attr_put_u32(nlh, TIPC_NLA_MON_REF, mon_ref);
+       mnl_attr_nest_end(nlh, nest);
+
+       return msg_dumpit(nlh, link_mon_peer_list_cb, NULL);
+}
+
+static int link_mon_list_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] = {};
+       char *req_bearer = data;
+       const char *bname;
+
+       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);
+
+       bname = mnl_attr_get_str(attrs[TIPC_NLA_MON_BEARER_NAME]);
+
+       if (req_bearer && (strcmp(req_bearer, bname) != 0))
+               return MNL_CB_OK;
+
+       if (mnl_attr_get_u32(attrs[TIPC_NLA_MON_PEERCNT]))
+               link_mon_peer_list(mnl_attr_get_u32(attrs[TIPC_NLA_MON_REF]));
+
+       return MNL_CB_OK;
+}
+
+static void cmd_link_mon_list_help(struct cmdl *cmdl)
+{
+       fprintf(stderr, "Usage: %s monitor list media MEDIA ARGS...\n\n",
+               cmdl->argv[0]);
+       print_bearer_media();
+}
+
+static int cmd_link_mon_list(struct nlmsghdr *nlh, const struct cmd *cmd,
+                            struct cmdl *cmdl, void *data)
+{
+       char buf[MNL_SOCKET_BUFFER_SIZE];
+       char bname[TIPC_MAX_BEARER_NAME];
+       struct opt opts[] = {
+               { "media",      NULL },
+               { "device",     NULL },
+               { "name",       NULL },
+               { NULL }
+       };
+       int err;
+       const char *title = "node          status monitored domain_generation "
+                           "applied_node_status [non_applied_node:status]";
+
+       if (parse_opts(opts, cmdl) < 0)
+               return -EINVAL;
+
+       if (help_flag) {
+               cmd->help(cmdl);
+               return -EINVAL;
+       }
+
+       if ((err = cmd_get_unique_bearer_name(cmd, cmdl, opts, bname)))
+               return err;
+
+       if (!(nlh = msg_init(buf, TIPC_NL_MON_GET))) {
+               fprintf(stderr, "error, message initialisation failed\n");
+               return -1;
+       }
+
+       printf("%s\n", title);
+
+       return msg_dumpit(nlh, link_mon_list_cb, bname);
+}
+
 static void cmd_link_mon_set_help(struct cmdl *cmdl)
 {
        fprintf(stderr, "Usage: %s monitor set PPROPERTY\n\n"
@@ -636,6 +846,7 @@ static void cmd_link_mon_help(struct cmdl *cmdl)
                "COMMANDS\n"
                " set                   - Set monitor properties\n"
                " get                   - Get monitor properties\n"
+               " list                  - List all cluster members\n"
                " summary               - Show local node monitor summary\n",
                cmdl->argv[0]);
 }
@@ -646,6 +857,7 @@ 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 },
+               { "list",       cmd_link_mon_list,      cmd_link_mon_list_help 
},
                { "summary",    cmd_link_mon_summary,   NULL },
                { NULL }
        };
-- 
2.1.4


------------------------------------------------------------------------------
What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
patterns at an interface-level. Reveals which users, apps, and protocols are 
consuming the most bandwidth. Provides multi-vendor support for NetFlow, 
J-Flow, sFlow and other flows. Make informed decisions using capacity planning
reports.http://sdm.link/zohodev2dev
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