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authorRichard Alpe <richard.alpe@ericsson.com>2014-11-20 10:29:18 +0100
committerDavid S. Miller <davem@davemloft.net>2014-11-21 15:01:31 -0500
commitfd3cf2ad519f73c2f7a46460ebedf32ad246520c (patch)
tree805def541890ad8d3343fff208f43d3d747c56a9 /net/tipc/net.c
parent3e4b6ab58d614934e7ca99bdf448089695d34ffa (diff)
download96b-common-fd3cf2ad519f73c2f7a46460ebedf32ad246520c.tar.gz
tipc: add net dump to new netlink api
Add TIPC_NL_NET_GET command to the new tipc netlink API. This command dumps the network id of the node. Netlink logical layout of returned network data: -> net -> id 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>
Diffstat (limited to 'net/tipc/net.c')
-rw-r--r--net/tipc/net.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/net/tipc/net.c b/net/tipc/net.c
index 93b9944a6a8b..d9e666a1be9d 100644
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -42,6 +42,11 @@
#include "node.h"
#include "config.h"
+static const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
+ [TIPC_NLA_NET_UNSPEC] = { .type = NLA_UNSPEC },
+ [TIPC_NLA_NET_ID] = { .type = NLA_U32 }
+};
+
/*
* The TIPC locking policy is designed to ensure a very fine locking
* granularity, permitting complete parallel access to individual
@@ -138,3 +143,57 @@ void tipc_net_stop(void)
pr_info("Left network mode\n");
}
+
+static int __tipc_nl_add_net(struct tipc_nl_msg *msg)
+{
+ void *hdr;
+ struct nlattr *attrs;
+
+ hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
+ NLM_F_MULTI, TIPC_NL_NET_GET);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ attrs = nla_nest_start(msg->skb, TIPC_NLA_NET);
+ if (!attrs)
+ goto msg_full;
+
+ if (nla_put_u32(msg->skb, TIPC_NLA_NET_ID, tipc_net_id))
+ goto attr_msg_full;
+
+ nla_nest_end(msg->skb, attrs);
+ genlmsg_end(msg->skb, hdr);
+
+ return 0;
+
+attr_msg_full:
+ nla_nest_cancel(msg->skb, attrs);
+msg_full:
+ genlmsg_cancel(msg->skb, hdr);
+
+ return -EMSGSIZE;
+}
+
+int tipc_nl_net_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int err;
+ int done = cb->args[0];
+ struct tipc_nl_msg msg;
+
+ if (done)
+ return 0;
+
+ msg.skb = skb;
+ msg.portid = NETLINK_CB(cb->skb).portid;
+ msg.seq = cb->nlh->nlmsg_seq;
+
+ err = __tipc_nl_add_net(&msg);
+ if (err)
+ goto out;
+
+ done = 1;
+out:
+ cb->args[0] = done;
+
+ return skb->len;
+}