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tipc: dump monitor attributes

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In this commit, we dump the monitor attributes when queried.
The link monitor attributes are separated into two kinds:
1. general attributes per bearer
2. specific attributes per node/peer
This style resembles the socket attributes and the nametable
publications per socket.

Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Parthasarathy Bhuvaragan 2016-07-26 08:47:22 +02:00 • committed by David S. Miller
parent ff0d3e78a6
commit cf6f7e1d51
6 changed files with 260 additions and 0 deletions
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86
net/tipc/node.c
View file

@ -2007,3 +2007,89 @@ int tipc_nl_node_get_monitor(struct sk_buff *skb, struct genl_info *info)
return genlmsg_reply(msg.skb, info);
}
int tipc_nl_node_dump_monitor(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
u32 prev_bearer = cb->args[0];
struct tipc_nl_msg msg;
int err;
int i;
if (prev_bearer == MAX_BEARERS)
return 0;
msg.skb = skb;
msg.portid = NETLINK_CB(cb->skb).portid;
msg.seq = cb->nlh->nlmsg_seq;
rtnl_lock();
for (i = prev_bearer; i < MAX_BEARERS; i++) {
prev_bearer = i;
err = __tipc_nl_add_monitor(net, &msg, prev_bearer);
if (err)
goto out;
}
out:
rtnl_unlock();
cb->args[0] = prev_bearer;
return skb->len;
}
int tipc_nl_node_dump_monitor_peer(struct sk_buff *skb,
struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
u32 prev_node = cb->args[1];
u32 bearer_id = cb->args[2];
int done = cb->args[0];
struct tipc_nl_msg msg;
int err;
if (!prev_node) {
struct nlattr **attrs;
struct nlattr *mon[TIPC_NLA_MON_MAX + 1];
err = tipc_nlmsg_parse(cb->nlh, &attrs);
if (err)
return err;
if (!attrs[TIPC_NLA_MON])
return -EINVAL;
err = nla_parse_nested(mon, TIPC_NLA_MON_MAX,
attrs[TIPC_NLA_MON],
tipc_nl_monitor_policy);
if (err)
return err;
if (!mon[TIPC_NLA_MON_REF])
return -EINVAL;
bearer_id = nla_get_u32(mon[TIPC_NLA_MON_REF]);
if (bearer_id >= MAX_BEARERS)
return -EINVAL;
}
if (done)
return 0;
msg.skb = skb;
msg.portid = NETLINK_CB(cb->skb).portid;
msg.seq = cb->nlh->nlmsg_seq;
rtnl_lock();
err = tipc_nl_add_monitor_peer(net, &msg, bearer_id, &prev_node);
if (!err)
done = 1;
rtnl_unlock();
cb->args[0] = done;
cb->args[1] = prev_node;
cb->args[2] = bearer_id;
return skb->len;
}