tipc: add publication dump to new netlink api

Add TIPC_NL_PUBL_GET command to the new tipc netlink API.

This command supports dumping of all publications for a specific
socket.

Netlink logical layout of request message:
    -> socket
        -> reference

Netlink logical layout of response message:
    -> publication
        -> type
        -> lower
        -> upper

Signed-off-by: Richard Alpe <[email protected]>
Reviewed-by: Erik Hugne <[email protected]>
Reviewed-by: Jon Maloy <[email protected]>
Acked-by: Ying Xue <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

1 files changed, 17 insertions, 0 deletions

diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index 951fabeec8b7..9bc64aaff466 100644
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -74,6 +74,7 @@ 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, }
 };
 
 /* Legacy ASCII API */
@@ -130,9 +131,25 @@ static const struct genl_ops tipc_genl_v2_ops[] = {
 		.cmd	= TIPC_NL_SOCK_GET,
 		.dumpit	= tipc_nl_sk_dump,
 		.policy = tipc_nl_policy,
+	},
+	{
+		.cmd	= TIPC_NL_PUBL_GET,
+		.dumpit	= tipc_nl_publ_dump,
+		.policy = tipc_nl_policy,
 	}
 };
 
+int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
+{
+	u32 maxattr = tipc_genl_v2_family.maxattr;
+
+	*attr = tipc_genl_v2_family.attrbuf;
+	if (!*attr)
+		return -EOPNOTSUPP;
+
+	return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy);
+}
+
 int tipc_netlink_start(void)
 {
 	int res;