From 7be57fc6918470ecacd16b89c0d4f73d8fc265c4 Mon Sep 17 00:00:00 2001
From: Richard Alpe <richard.alpe@ericsson.com>
Date: Thu, 20 Nov 2014 10:29:12 +0100
Subject: tipc: add link get/dump to new netlink api

Add TIPC_NL_LINK_GET command to the new tipc netlink API.

This command supports dumping all information about all links
(including the broadcast link) or getting all information about a
specific link (not the broadcast link).

The information about a link includes name, transmission info,
properties and link statistics.

As the tipc broadcast link is special we unfortunately have to treat
it specially. It is a deliberate decision not to abstract the
broadcast link on this (API) level.

Netlink logical layout of link response message:
    -> port
        -> name
        -> MTU
        -> RX
        -> TX
        -> up flag
        -> active flag
        -> properties
           -> priority
           -> tolerance
           -> window
        -> statistics
            -> rx_info
            -> rx_fragments
            -> rx_fragmented
            -> rx_bundles
            -> rx_bundled
            -> tx_info
            -> tx_fragments
            -> tx_fragmented
            -> tx_bundles
            -> tx_bundled
            -> msg_prof_tot
            -> msg_len_cnt
            -> msg_len_tot
            -> msg_len_p0
            -> msg_len_p1
            -> msg_len_p2
            -> msg_len_p3
            -> msg_len_p4
            -> msg_len_p5
            -> msg_len_p6
            -> rx_states
            -> rx_probes
            -> rx_nacks
            -> rx_deferred
            -> tx_states
            -> tx_probes
            -> tx_nacks
            -> tx_acks
            -> retransmitted
            -> duplicates
            -> link_congs
            -> max_queue
            -> avg_queue

Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/tipc/netlink.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'net/tipc/netlink.c')

diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index 9bc64aaff466..ea168b889caa 100644
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -38,6 +38,7 @@
 #include "config.h"
 #include "socket.h"
 #include "bearer.h"
+#include "link.h"
 #include <net/genetlink.h>
 
 static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
@@ -74,7 +75,8 @@ static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
 	[TIPC_NLA_UNSPEC]	= { .type = NLA_UNSPEC, },
 	[TIPC_NLA_BEARER]	= { .type = NLA_NESTED, },
 	[TIPC_NLA_SOCK]		= { .type = NLA_NESTED, },
-	[TIPC_NLA_PUBL]		= { .type = NLA_NESTED, }
+	[TIPC_NLA_PUBL]		= { .type = NLA_NESTED, },
+	[TIPC_NLA_LINK]		= { .type = NLA_NESTED, },
 };
 
 /* Legacy ASCII API */
@@ -136,6 +138,12 @@ static const struct genl_ops tipc_genl_v2_ops[] = {
 		.cmd	= TIPC_NL_PUBL_GET,
 		.dumpit	= tipc_nl_publ_dump,
 		.policy = tipc_nl_policy,
+	},
+	{
+		.cmd	= TIPC_NL_LINK_GET,
+		.doit   = tipc_nl_link_get,
+		.dumpit	= tipc_nl_link_dump,
+		.policy = tipc_nl_policy,
 	}
 };
 
-- 
cgit