Lines Matching refs:peer
28 * Hash a peer key.
62 /* Step through the peer address in 16-bit portions for speed */
71 * Compare a peer to a key. Return -ve, 0 or +ve to indicate less than, same
78 static long rxrpc_peer_cmp_key(const struct rxrpc_peer *peer,
85 diff = ((peer->hash_key - hash_key) ?:
86 ((unsigned long)peer->local - (unsigned long)local) ?:
87 (peer->srx.transport_type - srx->transport_type) ?:
88 (peer->srx.transport_len - srx->transport_len) ?:
89 (peer->srx.transport.family - srx->transport.family));
95 return ((u16 __force)peer->srx.transport.sin.sin_port -
97 memcmp(&peer->srx.transport.sin.sin_addr,
102 return ((u16 __force)peer->srx.transport.sin6.sin6_port -
104 memcmp(&peer->srx.transport.sin6.sin6_addr,
121 struct rxrpc_peer *peer;
124 hash_for_each_possible_rcu(rxnet->peer_hash, peer, hash_link, hash_key) {
125 if (rxrpc_peer_cmp_key(peer, local, srx, hash_key) == 0 &&
126 refcount_read(&peer->ref) > 0)
127 return peer;
139 struct rxrpc_peer *peer;
142 peer = __rxrpc_lookup_peer_rcu(local, srx, hash_key);
143 if (peer)
144 _leave(" = %p {u=%d}", peer, refcount_read(&peer->ref));
145 return peer;
149 * assess the MTU size for the network interface through which this peer is
153 struct rxrpc_peer *peer)
164 peer->if_mtu = 1500;
167 switch (peer->srx.transport.family) {
171 peer->srx.transport.sin.sin_addr.s_addr, 0,
185 memcpy(&fl6->daddr, &peer->srx.transport.sin6.sin6_addr,
201 peer->if_mtu = dst_mtu(dst);
204 _leave(" [if_mtu %u]", peer->if_mtu);
208 * Allocate a peer.
213 struct rxrpc_peer *peer;
217 peer = kzalloc(sizeof(struct rxrpc_peer), gfp);
218 if (peer) {
219 refcount_set(&peer->ref, 1);
220 peer->local = rxrpc_get_local(local, rxrpc_local_get_peer);
221 INIT_HLIST_HEAD(&peer->error_targets);
222 peer->service_conns = RB_ROOT;
223 seqlock_init(&peer->service_conn_lock);
224 spin_lock_init(&peer->lock);
225 spin_lock_init(&peer->rtt_input_lock);
226 peer->debug_id = atomic_inc_return(&rxrpc_debug_id);
228 rxrpc_peer_init_rtt(peer);
230 peer->cong_ssthresh = RXRPC_TX_MAX_WINDOW;
231 trace_rxrpc_peer(peer->debug_id, 1, why);
234 _leave(" = %p", peer);
235 return peer;
239 * Initialise peer record.
241 static void rxrpc_init_peer(struct rxrpc_local *local, struct rxrpc_peer *peer,
244 peer->hash_key = hash_key;
245 rxrpc_assess_MTU_size(local, peer);
246 peer->mtu = peer->if_mtu;
247 peer->rtt_last_req = ktime_get_real();
249 switch (peer->srx.transport.family) {
251 peer->hdrsize = sizeof(struct iphdr);
255 peer->hdrsize = sizeof(struct ipv6hdr);
262 switch (peer->srx.transport_type) {
264 peer->hdrsize += sizeof(struct udphdr);
270 peer->hdrsize += sizeof(struct rxrpc_wire_header);
271 peer->maxdata = peer->mtu - peer->hdrsize;
275 * Set up a new peer.
282 struct rxrpc_peer *peer;
286 peer = rxrpc_alloc_peer(local, gfp, rxrpc_peer_new_client);
287 if (peer) {
288 memcpy(&peer->srx, srx, sizeof(*srx));
289 rxrpc_init_peer(local, peer, hash_key);
292 _leave(" = %p", peer);
293 return peer;
296 static void rxrpc_free_peer(struct rxrpc_peer *peer)
298 trace_rxrpc_peer(peer->debug_id, 0, rxrpc_peer_free);
299 rxrpc_put_local(peer->local, rxrpc_local_put_peer);
300 kfree_rcu(peer, rcu);
304 * Set up a new incoming peer. There shouldn't be any other matching peers
308 void rxrpc_new_incoming_peer(struct rxrpc_local *local, struct rxrpc_peer *peer)
313 hash_key = rxrpc_peer_hash_key(local, &peer->srx);
314 rxrpc_init_peer(local, peer, hash_key);
317 hash_add_rcu(rxnet->peer_hash, &peer->hash_link, hash_key);
318 list_add_tail(&peer->keepalive_link, &rxnet->peer_keepalive_new);
328 struct rxrpc_peer *peer, *candidate;
334 /* search the peer list first */
336 peer = __rxrpc_lookup_peer_rcu(local, srx, hash_key);
337 if (peer && !rxrpc_get_peer_maybe(peer, rxrpc_peer_get_lookup_client))
338 peer = NULL;
341 if (!peer) {
342 /* The peer is not yet present in hash - create a candidate
354 peer = __rxrpc_lookup_peer_rcu(local, srx, hash_key);
355 if (peer && !rxrpc_get_peer_maybe(peer, rxrpc_peer_get_lookup_client))
356 peer = NULL;
357 if (!peer) {
366 if (peer)
369 peer = candidate;
372 _leave(" = %p {u=%d}", peer, refcount_read(&peer->ref));
373 return peer;
377 * Get a ref on a peer record.
379 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer, enum rxrpc_peer_trace why)
383 __refcount_inc(&peer->ref, &r);
384 trace_rxrpc_peer(peer->debug_id, r + 1, why);
385 return peer;
389 * Get a ref on a peer record unless its usage has already reached 0.
391 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer,
396 if (peer) {
397 if (__refcount_inc_not_zero(&peer->ref, &r))
398 trace_rxrpc_peer(peer->debug_id, r + 1, why);
400 peer = NULL;
402 return peer;
406 * Discard a peer record.
408 static void __rxrpc_put_peer(struct rxrpc_peer *peer)
410 struct rxrpc_net *rxnet = peer->local->rxnet;
412 ASSERT(hlist_empty(&peer->error_targets));
415 hash_del_rcu(&peer->hash_link);
416 list_del_init(&peer->keepalive_link);
419 rxrpc_free_peer(peer);
423 * Drop a ref on a peer record.
425 void rxrpc_put_peer(struct rxrpc_peer *peer, enum rxrpc_peer_trace why)
431 if (peer) {
432 debug_id = peer->debug_id;
433 dead = __refcount_dec_and_test(&peer->ref, &r);
436 __rxrpc_put_peer(peer);
441 * Make sure all peer records have been discarded.
445 struct rxrpc_peer *peer;
452 hlist_for_each_entry(peer, &rxnet->peer_hash[i], hash_link) {
453 pr_err("Leaked peer %u {%u} %pISp\n",
454 peer->debug_id,
455 refcount_read(&peer->ref),
456 &peer->srx.transport);
462 * rxrpc_kernel_get_call_peer - Get the peer address of a call
466 * Get a record for the remote peer in a call.
470 return call->peer;
475 * rxrpc_kernel_get_srtt - Get a call's peer smoothed RTT
476 * @peer: The peer to query
478 * Get the call's peer smoothed RTT in uS or UINT_MAX if we have no samples.
480 unsigned int rxrpc_kernel_get_srtt(const struct rxrpc_peer *peer)
482 return peer->rtt_count > 0 ? peer->srtt_us >> 3 : UINT_MAX;
487 * rxrpc_kernel_remote_srx - Get the address of a peer
488 * @peer: The peer to query
490 * Get a pointer to the address from a peer record. The caller is responsible
493 const struct sockaddr_rxrpc *rxrpc_kernel_remote_srx(const struct rxrpc_peer *peer)
495 return peer ? &peer->srx : &rxrpc_null_addr;
500 * rxrpc_kernel_remote_addr - Get the peer transport address of a call
501 * @peer: The peer to query
503 * Get a pointer to the transport address from a peer record. The caller is
506 const struct sockaddr *rxrpc_kernel_remote_addr(const struct rxrpc_peer *peer)
509 (peer ? &peer->srx.transport : &rxrpc_null_addr.transport);