4  * Copyright (c) 1995-2006, 2014, Ericsson AB
5  * Copyright (c) 2005, 2010-2011, Wind River Systems
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
14  *    notice, this list of conditions and the following disclaimer in the
16  * 3. Neither the names of the copyright holders nor the names of its
20  * Alternatively, this software may be distributed under the terms of the
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34  * POSSIBILITY OF SUCH DAMAGE.
51  * port and node/link instances. The code consists of four major
52  * locking domains, each protected with their own disjunct set of locks.
55  *    RTNL lock is used to serialize the process of configuring bearer
56  *    on update side, and RCU lock is applied on read side to make
57  *    bearer instance valid on both paths of message transmission and
63  *    and they are guarded with RCU lock on read side. Especially node
71  *    are protected by node spin lock.
73  * 3: The transport level of the protocol.
74  *    This consists of the structures port, (and its user level
79  *     - The tipc_port spin_lock. This is protecting each port instance
81  *       this lock in the port itself, it has been placed in the
84  *       outside the TIPC core, however, so a pointer to the lock has
85  *       been added in the port instance, -to be used for unlocking
87  *     - A read/write lock to protect the reference table itself (teg.c).
88  *       (Nobody is using read-only access to this, so it can just as
90  *     - A spin lock to protect the registry of kernel/driver users (reg.c)
91  *     - A global spin_lock (tipc_port_lock), which only task is to ensure
93  *       i.e., when a port is part of a linked list of ports.
98  *     - There is one big read/write-lock (tipc_nametbl_lock) protecting the
101  *     - There is one local spin_lock per sub_sequence, which can be seen
102  *       as a sub-domain to the tipc_nametbl_lock domain. It is used only
104  *       steps the root of the 'publication' linked list between each lookup.
105  *       This is always used within the scope of a tipc_nametbl_lock(read).
106  *     - A local spin_lock protecting the queue of subscriber events.
115 		return -1;  in tipc_net_init()
135 	if (cmpxchg(&tn->node_addr, 0, addr))  in tipc_net_finalize()
148 	tipc_net_finalize(tipc_link_net(tn->bcl), tn->trial_addr);  in tipc_net_finalize_work()
167 	u64 *w0 = (u64 *)&tn->node_id[0];  in __tipc_nl_add_net()
168 	u64 *w1 = (u64 *)&tn->node_id[8];  in __tipc_nl_add_net()
172 	hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,  in __tipc_nl_add_net()
175 		return -EMSGSIZE;  in __tipc_nl_add_net()
177 	attrs = nla_nest_start_noflag(msg->skb, TIPC_NLA_NET);  in __tipc_nl_add_net()
181 	if (nla_put_u32(msg->skb, TIPC_NLA_NET_ID, tn->net_id))  in __tipc_nl_add_net()
183 	if (nla_put_u64_64bit(msg->skb, TIPC_NLA_NET_NODEID, *w0, 0))  in __tipc_nl_add_net()
185 	if (nla_put_u64_64bit(msg->skb, TIPC_NLA_NET_NODEID_W1, *w1, 0))  in __tipc_nl_add_net()
187 	nla_nest_end(msg->skb, attrs);  in __tipc_nl_add_net()
188 	genlmsg_end(msg->skb, hdr);  in __tipc_nl_add_net()
193 	nla_nest_cancel(msg->skb, attrs);  in __tipc_nl_add_net()
195 	genlmsg_cancel(msg->skb, hdr);  in __tipc_nl_add_net()
197 	return -EMSGSIZE;  in __tipc_nl_add_net()
202 	struct net *net = sock_net(skb->sk);  in tipc_nl_net_dump()
204 	int done = cb->args[0];  in tipc_nl_net_dump()
211 	msg.portid = NETLINK_CB(cb->skb).portid;  in tipc_nl_net_dump()
212 	msg.seq = cb->nlh->nlmsg_seq;  in tipc_nl_net_dump()
220 	cb->args[0] = done;  in tipc_nl_net_dump()
222 	return skb->len;  in tipc_nl_net_dump()
228 	struct net *net = sock_net(skb->sk);  in __tipc_nl_net_set()
232 	if (!info->attrs[TIPC_NLA_NET])  in __tipc_nl_net_set()
233 		return -EINVAL;  in __tipc_nl_net_set()
236 					  info->attrs[TIPC_NLA_NET],  in __tipc_nl_net_set()
237 					  tipc_nl_net_policy, info->extack);  in __tipc_nl_net_set()
244 		return -EPERM;  in __tipc_nl_net_set()
251 			return -EINVAL;  in __tipc_nl_net_set()
253 		tn->net_id = val;  in __tipc_nl_net_set()
261 			return -EINVAL;  in __tipc_nl_net_set()
262 		tn->legacy_addr_format = true;  in __tipc_nl_net_set()
272 			return -EINVAL;  in __tipc_nl_net_set()
297 	hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,  in __tipc_nl_addr_legacy_get()
300 		return -EMSGSIZE;  in __tipc_nl_addr_legacy_get()
302 	attrs = nla_nest_start(msg->skb, TIPC_NLA_NET);  in __tipc_nl_addr_legacy_get()
306 	if (tn->legacy_addr_format)  in __tipc_nl_addr_legacy_get()
307 		if (nla_put_flag(msg->skb, TIPC_NLA_NET_ADDR_LEGACY))  in __tipc_nl_addr_legacy_get()
310 	nla_nest_end(msg->skb, attrs);  in __tipc_nl_addr_legacy_get()
311 	genlmsg_end(msg->skb, hdr);  in __tipc_nl_addr_legacy_get()
316 	nla_nest_cancel(msg->skb, attrs);  in __tipc_nl_addr_legacy_get()
318 	genlmsg_cancel(msg->skb, hdr);  in __tipc_nl_addr_legacy_get()
320 	return -EMSGSIZE;  in __tipc_nl_addr_legacy_get()
325 	struct net *net = sock_net(skb->sk);  in tipc_nl_net_addr_legacy_get()
332 		return -ENOMEM;  in tipc_nl_net_addr_legacy_get()
335 	msg.portid = info->snd_portid;  in tipc_nl_net_addr_legacy_get()
336 	msg.seq = info->snd_seq;  in tipc_nl_net_addr_legacy_get()