net/tipc/net.c

4  * Copyright (c) 1995-2006, 2014, Ericsson AB
5  * Copyright (c) 2005, 2010-2011, Wind River Systems
70  *    are protected by node spin lock.
78  *     - The tipc_port spin_lock. This is protecting each port instance
81  *       corresponding reference table entry, which has the same life
84  *       been added in the port instance, -to be used for unlocking
86  *     - A read/write lock to protect the reference table itself (teg.c).
87  *       (Nobody is using read-only access to this, so it can just as
89  *     - A spin lock to protect the registry of kernel/driver users (reg.c)
90  *     - A global spin_lock (tipc_port_lock), which only task is to ensure
96  *  4: The name table (name_table.c, name_distr.c, subscription.c)
97  *     - There is one big read/write-lock (tipc_nametbl_lock) protecting the
98  *       overall name table structure. Nothing must be added/removed to
100  *     - There is one local spin_lock per sub_sequence, which can be seen
101  *       as a sub-domain to the tipc_nametbl_lock domain. It is used only
105  *     - A local spin_lock protecting the queue of subscriber events.
114 		return -1;  in tipc_net_init()
129 	if (cmpxchg(&tn->node_addr, 0, addr))  in tipc_net_finalize()
144 	tipc_net_finalize(fwork->net, fwork->addr);  in tipc_net_finalize_work()
151 	tn->final_work.net = net;  in tipc_sched_net_finalize()
152 	tn->final_work.addr = addr;  in tipc_sched_net_finalize()
153 	schedule_work(&tn->final_work.work);  in tipc_sched_net_finalize()
172 	u64 *w0 = (u64 *)&tn->node_id[0];  in __tipc_nl_add_net()
173 	u64 *w1 = (u64 *)&tn->node_id[8];  in __tipc_nl_add_net()
177 	hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,  in __tipc_nl_add_net()
180 		return -EMSGSIZE;  in __tipc_nl_add_net()
182 	attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_NET);  in __tipc_nl_add_net()
186 	if (nla_put_u32(msg->skb, TIPC_NLA_NET_ID, tn->net_id))  in __tipc_nl_add_net()
188 	if (nla_put_u64_64bit(msg->skb, TIPC_NLA_NET_NODEID, *w0, 0))  in __tipc_nl_add_net()
190 	if (nla_put_u64_64bit(msg->skb, TIPC_NLA_NET_NODEID_W1, *w1, 0))  in __tipc_nl_add_net()
192 	nla_nest_end(msg->skb, attrs);  in __tipc_nl_add_net()
193 	genlmsg_end(msg->skb, hdr);  in __tipc_nl_add_net()
198 	nla_nest_cancel(msg->skb, attrs);  in __tipc_nl_add_net()
200 	genlmsg_cancel(msg->skb, hdr);  in __tipc_nl_add_net()
202 	return -EMSGSIZE;  in __tipc_nl_add_net()
207 	struct net *net = sock_net(skb->sk);  in tipc_nl_net_dump()
209 	int done = cb->args[0];  in tipc_nl_net_dump()
216 	msg.portid = NETLINK_CB(cb->skb).portid;  in tipc_nl_net_dump()
217 	msg.seq = cb->nlh->nlmsg_seq;  in tipc_nl_net_dump()
225 	cb->args[0] = done;  in tipc_nl_net_dump()
227 	return skb->len;  in tipc_nl_net_dump()
233 	struct net *net = sock_net(skb->sk);  in __tipc_nl_net_set()
237 	if (!info->attrs[TIPC_NLA_NET])  in __tipc_nl_net_set()
238 		return -EINVAL;  in __tipc_nl_net_set()
241 					  info->attrs[TIPC_NLA_NET],  in __tipc_nl_net_set()
242 					  tipc_nl_net_policy, info->extack);  in __tipc_nl_net_set()
249 		return -EPERM;  in __tipc_nl_net_set()
256 			return -EINVAL;  in __tipc_nl_net_set()
258 		tn->net_id = val;  in __tipc_nl_net_set()
266 			return -EINVAL;  in __tipc_nl_net_set()
267 		tn->legacy_addr_format = true;  in __tipc_nl_net_set()
277 			return -EINVAL;  in __tipc_nl_net_set()
302 	hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,  in __tipc_nl_addr_legacy_get()
305 		return -EMSGSIZE;  in __tipc_nl_addr_legacy_get()
307 	attrs = nla_nest_start(msg->skb, TIPC_NLA_NET);  in __tipc_nl_addr_legacy_get()
311 	if (tn->legacy_addr_format)  in __tipc_nl_addr_legacy_get()
312 		if (nla_put_flag(msg->skb, TIPC_NLA_NET_ADDR_LEGACY))  in __tipc_nl_addr_legacy_get()
315 	nla_nest_end(msg->skb, attrs);  in __tipc_nl_addr_legacy_get()
316 	genlmsg_end(msg->skb, hdr);  in __tipc_nl_addr_legacy_get()
321 	nla_nest_cancel(msg->skb, attrs);  in __tipc_nl_addr_legacy_get()
323 	genlmsg_cancel(msg->skb, hdr);  in __tipc_nl_addr_legacy_get()
325 	return -EMSGSIZE;  in __tipc_nl_addr_legacy_get()
330 	struct net *net = sock_net(skb->sk);  in tipc_nl_net_addr_legacy_get()
337 		return -ENOMEM;  in tipc_nl_net_addr_legacy_get()
340 	msg.portid = info->snd_portid;  in tipc_nl_net_addr_legacy_get()
341 	msg.seq = info->snd_seq;  in tipc_nl_net_addr_legacy_get()