Lines Matching +full:sub +full:- +full:module
4 * Copyright (c) 2012-2013, Wind River Systems
5 * Copyright (c) 2017-2018, Ericsson AB
45 #include <linux/module.h>
56 * struct tipc_topsrv - TIPC server structure
80 * struct tipc_conn - TIPC connection structure
121 return con && test_bit(CF_CONNECTED, &con->flags); in connected()
127 struct tipc_topsrv *s = con->server; in tipc_conn_kref_release()
130 spin_lock_bh(&s->idr_lock); in tipc_conn_kref_release()
131 idr_remove(&s->conn_idr, con->conid); in tipc_conn_kref_release()
132 s->idr_in_use--; in tipc_conn_kref_release()
133 spin_unlock_bh(&s->idr_lock); in tipc_conn_kref_release()
134 if (con->sock) in tipc_conn_kref_release()
135 sock_release(con->sock); in tipc_conn_kref_release()
137 spin_lock_bh(&con->outqueue_lock); in tipc_conn_kref_release()
138 list_for_each_entry_safe(e, safe, &con->outqueue, list) { in tipc_conn_kref_release()
139 list_del(&e->list); in tipc_conn_kref_release()
142 spin_unlock_bh(&con->outqueue_lock); in tipc_conn_kref_release()
148 kref_put(&con->kref, tipc_conn_kref_release); in conn_put()
153 kref_get(&con->kref); in conn_get()
158 struct sock *sk = con->sock->sk; in tipc_conn_close()
161 write_lock_bh(&sk->sk_callback_lock); in tipc_conn_close()
162 disconnect = test_and_clear_bit(CF_CONNECTED, &con->flags); in tipc_conn_close()
165 sk->sk_user_data = NULL; in tipc_conn_close()
168 write_unlock_bh(&sk->sk_callback_lock); in tipc_conn_close()
174 /* Don't flush pending works, -just let them expire */ in tipc_conn_close()
175 kernel_sock_shutdown(con->sock, SHUT_RDWR); in tipc_conn_close()
187 return ERR_PTR(-ENOMEM); in tipc_conn_alloc()
189 kref_init(&con->kref); in tipc_conn_alloc()
190 INIT_LIST_HEAD(&con->outqueue); in tipc_conn_alloc()
191 INIT_LIST_HEAD(&con->sub_list); in tipc_conn_alloc()
192 spin_lock_init(&con->outqueue_lock); in tipc_conn_alloc()
193 spin_lock_init(&con->sub_lock); in tipc_conn_alloc()
194 INIT_WORK(&con->swork, tipc_conn_send_work); in tipc_conn_alloc()
195 INIT_WORK(&con->rwork, tipc_conn_recv_work); in tipc_conn_alloc()
197 spin_lock_bh(&s->idr_lock); in tipc_conn_alloc()
198 ret = idr_alloc(&s->conn_idr, con, 0, 0, GFP_ATOMIC); in tipc_conn_alloc()
201 spin_unlock_bh(&s->idr_lock); in tipc_conn_alloc()
202 return ERR_PTR(-ENOMEM); in tipc_conn_alloc()
204 con->conid = ret; in tipc_conn_alloc()
205 s->idr_in_use++; in tipc_conn_alloc()
207 set_bit(CF_CONNECTED, &con->flags); in tipc_conn_alloc()
208 con->server = s; in tipc_conn_alloc()
209 con->sock = sock; in tipc_conn_alloc()
211 spin_unlock_bh(&s->idr_lock); in tipc_conn_alloc()
220 spin_lock_bh(&s->idr_lock); in tipc_conn_lookup()
221 con = idr_find(&s->conn_idr, conid); in tipc_conn_lookup()
222 if (!connected(con) || !kref_get_unless_zero(&con->kref)) in tipc_conn_lookup()
224 spin_unlock_bh(&s->idr_lock); in tipc_conn_lookup()
228 /* tipc_conn_delete_sub - delete a specific or all subscriptions
233 struct tipc_net *tn = tipc_net(con->server->net); in tipc_conn_delete_sub()
234 struct list_head *sub_list = &con->sub_list; in tipc_conn_delete_sub()
235 struct tipc_subscription *sub, *tmp; in tipc_conn_delete_sub() local
237 spin_lock_bh(&con->sub_lock); in tipc_conn_delete_sub()
238 list_for_each_entry_safe(sub, tmp, sub_list, sub_list) { in tipc_conn_delete_sub()
239 if (!s || !memcmp(s, &sub->evt.s, sizeof(*s))) { in tipc_conn_delete_sub()
240 tipc_sub_unsubscribe(sub); in tipc_conn_delete_sub()
241 atomic_dec(&tn->subscription_count); in tipc_conn_delete_sub()
246 spin_unlock_bh(&con->sub_lock); in tipc_conn_delete_sub()
251 struct list_head *queue = &con->outqueue; in tipc_conn_send_to_sock()
252 struct tipc_topsrv *srv = con->server; in tipc_conn_send_to_sock()
260 spin_lock_bh(&con->outqueue_lock); in tipc_conn_send_to_sock()
264 evt = &e->evt; in tipc_conn_send_to_sock()
265 spin_unlock_bh(&con->outqueue_lock); in tipc_conn_send_to_sock()
267 if (e->inactive) in tipc_conn_send_to_sock()
268 tipc_conn_delete_sub(con, &evt->s); in tipc_conn_send_to_sock()
276 if (con->sock) { in tipc_conn_send_to_sock()
277 ret = kernel_sendmsg(con->sock, &msg, &iov, in tipc_conn_send_to_sock()
279 if (ret == -EWOULDBLOCK || ret == 0) { in tipc_conn_send_to_sock()
286 tipc_topsrv_kern_evt(srv->net, evt); in tipc_conn_send_to_sock()
294 spin_lock_bh(&con->outqueue_lock); in tipc_conn_send_to_sock()
295 list_del(&e->list); in tipc_conn_send_to_sock()
298 spin_unlock_bh(&con->outqueue_lock); in tipc_conn_send_to_sock()
311 /* tipc_topsrv_queue_evt() - interrupt level call from a subscription instance
312 * The queued work is launched into tipc_conn_send_work()->tipc_conn_send_to_sock()
331 e->inactive = (event == TIPC_SUBSCR_TIMEOUT); in tipc_topsrv_queue_evt()
332 memcpy(&e->evt, evt, sizeof(*evt)); in tipc_topsrv_queue_evt()
333 spin_lock_bh(&con->outqueue_lock); in tipc_topsrv_queue_evt()
334 list_add_tail(&e->list, &con->outqueue); in tipc_topsrv_queue_evt()
335 spin_unlock_bh(&con->outqueue_lock); in tipc_topsrv_queue_evt()
337 if (queue_work(srv->send_wq, &con->swork)) in tipc_topsrv_queue_evt()
343 /* tipc_conn_write_space - interrupt callback after a sendmsg EAGAIN
345 * The queued work is launched into tipc_send_work()->tipc_conn_send_to_sock()
351 read_lock_bh(&sk->sk_callback_lock); in tipc_conn_write_space()
352 con = sk->sk_user_data; in tipc_conn_write_space()
355 if (!queue_work(con->server->send_wq, &con->swork)) in tipc_conn_write_space()
358 read_unlock_bh(&sk->sk_callback_lock); in tipc_conn_write_space()
365 struct tipc_net *tn = tipc_net(srv->net); in tipc_conn_rcv_sub()
366 struct tipc_subscription *sub; in tipc_conn_rcv_sub() local
374 if (atomic_read(&tn->subscription_count) >= TIPC_MAX_SUBSCR) { in tipc_conn_rcv_sub()
376 return -1; in tipc_conn_rcv_sub()
378 sub = tipc_sub_subscribe(srv->net, s, con->conid); in tipc_conn_rcv_sub()
379 if (!sub) in tipc_conn_rcv_sub()
380 return -1; in tipc_conn_rcv_sub()
381 atomic_inc(&tn->subscription_count); in tipc_conn_rcv_sub()
382 spin_lock_bh(&con->sub_lock); in tipc_conn_rcv_sub()
383 list_add(&sub->sub_list, &con->sub_list); in tipc_conn_rcv_sub()
384 spin_unlock_bh(&con->sub_lock); in tipc_conn_rcv_sub()
390 struct tipc_topsrv *srv = con->server; in tipc_conn_rcv_from_sock()
391 struct sock *sk = con->sock->sk; in tipc_conn_rcv_from_sock()
401 ret = sock_recvmsg(con->sock, &msg, MSG_DONTWAIT); in tipc_conn_rcv_from_sock()
402 if (ret == -EWOULDBLOCK) in tipc_conn_rcv_from_sock()
403 return -EWOULDBLOCK; in tipc_conn_rcv_from_sock()
405 read_lock_bh(&sk->sk_callback_lock); in tipc_conn_rcv_from_sock()
409 read_unlock_bh(&sk->sk_callback_lock); in tipc_conn_rcv_from_sock()
436 /* tipc_conn_data_ready - interrupt callback indicating the socket has data
437 * The queued work is launched into tipc_recv_work()->tipc_conn_rcv_from_sock()
445 read_lock_bh(&sk->sk_callback_lock); in tipc_conn_data_ready()
446 con = sk->sk_user_data; in tipc_conn_data_ready()
449 if (!queue_work(con->server->rcv_wq, &con->rwork)) in tipc_conn_data_ready()
452 read_unlock_bh(&sk->sk_callback_lock); in tipc_conn_data_ready()
463 spin_lock_bh(&srv->idr_lock); in tipc_topsrv_accept()
464 if (!srv->listener) { in tipc_topsrv_accept()
465 spin_unlock_bh(&srv->idr_lock); in tipc_topsrv_accept()
468 lsock = srv->listener; in tipc_topsrv_accept()
469 spin_unlock_bh(&srv->idr_lock); in tipc_topsrv_accept()
482 newsk = newsock->sk; in tipc_topsrv_accept()
483 write_lock_bh(&newsk->sk_callback_lock); in tipc_topsrv_accept()
484 newsk->sk_data_ready = tipc_conn_data_ready; in tipc_topsrv_accept()
485 newsk->sk_write_space = tipc_conn_write_space; in tipc_topsrv_accept()
486 newsk->sk_user_data = con; in tipc_topsrv_accept()
487 write_unlock_bh(&newsk->sk_callback_lock); in tipc_topsrv_accept()
490 newsk->sk_data_ready(newsk); in tipc_topsrv_accept()
495 /* tipc_topsrv_listener_data_ready - interrupt callback with connection request
504 read_lock_bh(&sk->sk_callback_lock); in tipc_topsrv_listener_data_ready()
505 srv = sk->sk_user_data; in tipc_topsrv_listener_data_ready()
507 queue_work(srv->rcv_wq, &srv->awork); in tipc_topsrv_listener_data_ready()
508 read_unlock_bh(&sk->sk_callback_lock); in tipc_topsrv_listener_data_ready()
518 rc = sock_create_kern(srv->net, AF_TIPC, SOCK_SEQPACKET, 0, &lsock); in tipc_topsrv_create_listener()
522 srv->listener = lsock; in tipc_topsrv_create_listener()
523 sk = lsock->sk; in tipc_topsrv_create_listener()
524 write_lock_bh(&sk->sk_callback_lock); in tipc_topsrv_create_listener()
525 sk->sk_data_ready = tipc_topsrv_listener_data_ready; in tipc_topsrv_create_listener()
526 sk->sk_user_data = srv; in tipc_topsrv_create_listener()
527 write_unlock_bh(&sk->sk_callback_lock); in tipc_topsrv_create_listener()
549 /* As server's listening socket owner and creator is the same module, in tipc_topsrv_create_listener()
550 * we have to decrease TIPC module reference count to guarantee that in tipc_topsrv_create_listener()
552 * executing "rmmod" command is unable to make TIPC module deleted in tipc_topsrv_create_listener()
553 * after TIPC module is inserted successfully. in tipc_topsrv_create_listener()
559 * decrement the module reference count twice to ensure that it keeps in tipc_topsrv_create_listener()
561 * must bump the module reference count twice as well before the socket in tipc_topsrv_create_listener()
564 module_put(lsock->ops->owner); in tipc_topsrv_create_listener()
565 module_put(sk->sk_prot_creator->owner); in tipc_topsrv_create_listener()
570 return -EINVAL; in tipc_topsrv_create_listener()
576 struct tipc_subscr sub; in tipc_topsrv_kern_subscr() local
580 sub.seq.type = type; in tipc_topsrv_kern_subscr()
581 sub.seq.lower = lower; in tipc_topsrv_kern_subscr()
582 sub.seq.upper = upper; in tipc_topsrv_kern_subscr()
583 sub.timeout = TIPC_WAIT_FOREVER; in tipc_topsrv_kern_subscr()
584 sub.filter = filter; in tipc_topsrv_kern_subscr()
585 *(u64 *)&sub.usr_handle = (u64)port; in tipc_topsrv_kern_subscr()
591 *conid = con->conid; in tipc_topsrv_kern_subscr()
592 rc = tipc_conn_rcv_sub(tipc_topsrv(net), con, &sub); in tipc_topsrv_kern_subscr()
608 test_and_clear_bit(CF_CONNECTED, &con->flags); in tipc_topsrv_kern_unsubscr()
616 u32 port = *(u32 *)&evt->s.usr_handle; in tipc_topsrv_kern_evt()
635 s->rcv_wq = alloc_ordered_workqueue("tipc_rcv", 0); in tipc_topsrv_work_start()
636 if (!s->rcv_wq) { in tipc_topsrv_work_start()
638 return -ENOMEM; in tipc_topsrv_work_start()
641 s->send_wq = alloc_ordered_workqueue("tipc_send", 0); in tipc_topsrv_work_start()
642 if (!s->send_wq) { in tipc_topsrv_work_start()
644 destroy_workqueue(s->rcv_wq); in tipc_topsrv_work_start()
645 return -ENOMEM; in tipc_topsrv_work_start()
653 destroy_workqueue(s->rcv_wq); in tipc_topsrv_work_stop()
654 destroy_workqueue(s->send_wq); in tipc_topsrv_work_stop()
666 return -ENOMEM; in tipc_topsrv_start()
668 srv->net = net; in tipc_topsrv_start()
669 INIT_WORK(&srv->awork, tipc_topsrv_accept); in tipc_topsrv_start()
671 strscpy(srv->name, name, sizeof(srv->name)); in tipc_topsrv_start()
672 tn->topsrv = srv; in tipc_topsrv_start()
673 atomic_set(&tn->subscription_count, 0); in tipc_topsrv_start()
675 spin_lock_init(&srv->idr_lock); in tipc_topsrv_start()
676 idr_init(&srv->conn_idr); in tipc_topsrv_start()
677 srv->idr_in_use = 0; in tipc_topsrv_start()
699 struct socket *lsock = srv->listener; in tipc_topsrv_stop()
703 spin_lock_bh(&srv->idr_lock); in tipc_topsrv_stop()
704 for (id = 0; srv->idr_in_use; id++) { in tipc_topsrv_stop()
705 con = idr_find(&srv->conn_idr, id); in tipc_topsrv_stop()
707 spin_unlock_bh(&srv->idr_lock); in tipc_topsrv_stop()
709 spin_lock_bh(&srv->idr_lock); in tipc_topsrv_stop()
712 __module_get(lsock->ops->owner); in tipc_topsrv_stop()
713 __module_get(lsock->sk->sk_prot_creator->owner); in tipc_topsrv_stop()
714 srv->listener = NULL; in tipc_topsrv_stop()
715 spin_unlock_bh(&srv->idr_lock); in tipc_topsrv_stop()
719 idr_destroy(&srv->conn_idr); in tipc_topsrv_stop()