Lines Matching +full:sub +full:- +full:module
4 * Copyright (c) 2012-2013, Wind River Systems
5 * Copyright (c) 2017-2018, Ericsson AB
44 #include <linux/module.h>
55 * struct tipc_topsrv - TIPC server structure
85 * struct tipc_conn - TIPC connection structure
128 return con && test_bit(CF_CONNECTED, &con->flags); in connected()
134 struct tipc_topsrv *s = con->server; in tipc_conn_kref_release()
137 spin_lock_bh(&s->idr_lock); in tipc_conn_kref_release()
138 idr_remove(&s->conn_idr, con->conid); in tipc_conn_kref_release()
139 s->idr_in_use--; in tipc_conn_kref_release()
140 spin_unlock_bh(&s->idr_lock); in tipc_conn_kref_release()
141 if (con->sock) in tipc_conn_kref_release()
142 sock_release(con->sock); in tipc_conn_kref_release()
144 spin_lock_bh(&con->outqueue_lock); in tipc_conn_kref_release()
145 list_for_each_entry_safe(e, safe, &con->outqueue, list) { in tipc_conn_kref_release()
146 list_del(&e->list); in tipc_conn_kref_release()
149 spin_unlock_bh(&con->outqueue_lock); in tipc_conn_kref_release()
155 kref_put(&con->kref, tipc_conn_kref_release); in conn_put()
160 kref_get(&con->kref); in conn_get()
165 struct sock *sk = con->sock->sk; in tipc_conn_close()
168 write_lock_bh(&sk->sk_callback_lock); in tipc_conn_close()
169 disconnect = test_and_clear_bit(CF_CONNECTED, &con->flags); in tipc_conn_close()
172 sk->sk_user_data = NULL; in tipc_conn_close()
175 write_unlock_bh(&sk->sk_callback_lock); in tipc_conn_close()
181 /* Don't flush pending works, -just let them expire */ in tipc_conn_close()
182 kernel_sock_shutdown(con->sock, SHUT_RDWR); in tipc_conn_close()
194 return ERR_PTR(-ENOMEM); in tipc_conn_alloc()
196 kref_init(&con->kref); in tipc_conn_alloc()
197 INIT_LIST_HEAD(&con->outqueue); in tipc_conn_alloc()
198 INIT_LIST_HEAD(&con->sub_list); in tipc_conn_alloc()
199 spin_lock_init(&con->outqueue_lock); in tipc_conn_alloc()
200 spin_lock_init(&con->sub_lock); in tipc_conn_alloc()
201 INIT_WORK(&con->swork, tipc_conn_send_work); in tipc_conn_alloc()
202 INIT_WORK(&con->rwork, tipc_conn_recv_work); in tipc_conn_alloc()
204 spin_lock_bh(&s->idr_lock); in tipc_conn_alloc()
205 ret = idr_alloc(&s->conn_idr, con, 0, 0, GFP_ATOMIC); in tipc_conn_alloc()
208 spin_unlock_bh(&s->idr_lock); in tipc_conn_alloc()
209 return ERR_PTR(-ENOMEM); in tipc_conn_alloc()
211 con->conid = ret; in tipc_conn_alloc()
212 s->idr_in_use++; in tipc_conn_alloc()
213 spin_unlock_bh(&s->idr_lock); in tipc_conn_alloc()
215 set_bit(CF_CONNECTED, &con->flags); in tipc_conn_alloc()
216 con->server = s; in tipc_conn_alloc()
225 spin_lock_bh(&s->idr_lock); in tipc_conn_lookup()
226 con = idr_find(&s->conn_idr, conid); in tipc_conn_lookup()
227 if (!connected(con) || !kref_get_unless_zero(&con->kref)) in tipc_conn_lookup()
229 spin_unlock_bh(&s->idr_lock); in tipc_conn_lookup()
233 /* tipc_conn_delete_sub - delete a specific or all subscriptions
238 struct tipc_net *tn = tipc_net(con->server->net); in tipc_conn_delete_sub()
239 struct list_head *sub_list = &con->sub_list; in tipc_conn_delete_sub()
240 struct tipc_subscription *sub, *tmp; in tipc_conn_delete_sub() local
242 spin_lock_bh(&con->sub_lock); in tipc_conn_delete_sub()
243 list_for_each_entry_safe(sub, tmp, sub_list, sub_list) { in tipc_conn_delete_sub()
244 if (!s || !memcmp(s, &sub->evt.s, sizeof(*s))) { in tipc_conn_delete_sub()
245 tipc_sub_unsubscribe(sub); in tipc_conn_delete_sub()
246 atomic_dec(&tn->subscription_count); in tipc_conn_delete_sub()
251 spin_unlock_bh(&con->sub_lock); in tipc_conn_delete_sub()
256 struct list_head *queue = &con->outqueue; in tipc_conn_send_to_sock()
257 struct tipc_topsrv *srv = con->server; in tipc_conn_send_to_sock()
265 spin_lock_bh(&con->outqueue_lock); in tipc_conn_send_to_sock()
269 evt = &e->evt; in tipc_conn_send_to_sock()
270 spin_unlock_bh(&con->outqueue_lock); in tipc_conn_send_to_sock()
272 if (e->inactive) in tipc_conn_send_to_sock()
273 tipc_conn_delete_sub(con, &evt->s); in tipc_conn_send_to_sock()
281 if (con->sock) { in tipc_conn_send_to_sock()
282 ret = kernel_sendmsg(con->sock, &msg, &iov, in tipc_conn_send_to_sock()
284 if (ret == -EWOULDBLOCK || ret == 0) { in tipc_conn_send_to_sock()
291 tipc_topsrv_kern_evt(srv->net, evt); in tipc_conn_send_to_sock()
299 spin_lock_bh(&con->outqueue_lock); in tipc_conn_send_to_sock()
300 list_del(&e->list); in tipc_conn_send_to_sock()
303 spin_unlock_bh(&con->outqueue_lock); in tipc_conn_send_to_sock()
316 /* tipc_topsrv_queue_evt() - interrupt level call from a subscription instance
317 * The queued work is launched into tipc_conn_send_work()->tipc_conn_send_to_sock()
336 e->inactive = (event == TIPC_SUBSCR_TIMEOUT); in tipc_topsrv_queue_evt()
337 memcpy(&e->evt, evt, sizeof(*evt)); in tipc_topsrv_queue_evt()
338 spin_lock_bh(&con->outqueue_lock); in tipc_topsrv_queue_evt()
339 list_add_tail(&e->list, &con->outqueue); in tipc_topsrv_queue_evt()
340 spin_unlock_bh(&con->outqueue_lock); in tipc_topsrv_queue_evt()
342 if (queue_work(srv->send_wq, &con->swork)) in tipc_topsrv_queue_evt()
348 /* tipc_conn_write_space - interrupt callback after a sendmsg EAGAIN
350 * The queued work is launched into tipc_send_work()->tipc_conn_send_to_sock()
356 read_lock_bh(&sk->sk_callback_lock); in tipc_conn_write_space()
357 con = sk->sk_user_data; in tipc_conn_write_space()
360 if (!queue_work(con->server->send_wq, &con->swork)) in tipc_conn_write_space()
363 read_unlock_bh(&sk->sk_callback_lock); in tipc_conn_write_space()
370 struct tipc_net *tn = tipc_net(srv->net); in tipc_conn_rcv_sub()
371 struct tipc_subscription *sub; in tipc_conn_rcv_sub() local
374 s->filter &= __constant_ntohl(~TIPC_SUB_CANCEL); in tipc_conn_rcv_sub()
378 if (atomic_read(&tn->subscription_count) >= TIPC_MAX_SUBSCR) { in tipc_conn_rcv_sub()
380 return -1; in tipc_conn_rcv_sub()
382 sub = tipc_sub_subscribe(srv->net, s, con->conid); in tipc_conn_rcv_sub()
383 if (!sub) in tipc_conn_rcv_sub()
384 return -1; in tipc_conn_rcv_sub()
385 atomic_inc(&tn->subscription_count); in tipc_conn_rcv_sub()
386 spin_lock_bh(&con->sub_lock); in tipc_conn_rcv_sub()
387 list_add(&sub->sub_list, &con->sub_list); in tipc_conn_rcv_sub()
388 spin_unlock_bh(&con->sub_lock); in tipc_conn_rcv_sub()
394 struct tipc_topsrv *srv = con->server; in tipc_conn_rcv_from_sock()
395 struct sock *sk = con->sock->sk; in tipc_conn_rcv_from_sock()
405 ret = sock_recvmsg(con->sock, &msg, MSG_DONTWAIT); in tipc_conn_rcv_from_sock()
406 if (ret == -EWOULDBLOCK) in tipc_conn_rcv_from_sock()
407 return -EWOULDBLOCK; in tipc_conn_rcv_from_sock()
409 read_lock_bh(&sk->sk_callback_lock); in tipc_conn_rcv_from_sock()
413 read_unlock_bh(&sk->sk_callback_lock); in tipc_conn_rcv_from_sock()
440 /* tipc_conn_data_ready - interrupt callback indicating the socket has data
441 * The queued work is launched into tipc_recv_work()->tipc_conn_rcv_from_sock()
447 read_lock_bh(&sk->sk_callback_lock); in tipc_conn_data_ready()
448 con = sk->sk_user_data; in tipc_conn_data_ready()
451 if (!queue_work(con->server->rcv_wq, &con->rwork)) in tipc_conn_data_ready()
454 read_unlock_bh(&sk->sk_callback_lock); in tipc_conn_data_ready()
460 struct socket *lsock = srv->listener; in tipc_topsrv_accept()
477 newsk = newsock->sk; in tipc_topsrv_accept()
478 write_lock_bh(&newsk->sk_callback_lock); in tipc_topsrv_accept()
479 newsk->sk_data_ready = tipc_conn_data_ready; in tipc_topsrv_accept()
480 newsk->sk_write_space = tipc_conn_write_space; in tipc_topsrv_accept()
481 newsk->sk_user_data = con; in tipc_topsrv_accept()
482 con->sock = newsock; in tipc_topsrv_accept()
483 write_unlock_bh(&newsk->sk_callback_lock); in tipc_topsrv_accept()
486 newsk->sk_data_ready(newsk); in tipc_topsrv_accept()
490 /* tipc_toprsv_listener_data_ready - interrupt callback with connection request
497 read_lock_bh(&sk->sk_callback_lock); in tipc_topsrv_listener_data_ready()
498 srv = sk->sk_user_data; in tipc_topsrv_listener_data_ready()
499 if (srv->listener) in tipc_topsrv_listener_data_ready()
500 queue_work(srv->rcv_wq, &srv->awork); in tipc_topsrv_listener_data_ready()
501 read_unlock_bh(&sk->sk_callback_lock); in tipc_topsrv_listener_data_ready()
512 rc = sock_create_kern(srv->net, AF_TIPC, SOCK_SEQPACKET, 0, &lsock); in tipc_topsrv_create_listener()
516 srv->listener = lsock; in tipc_topsrv_create_listener()
517 sk = lsock->sk; in tipc_topsrv_create_listener()
518 write_lock_bh(&sk->sk_callback_lock); in tipc_topsrv_create_listener()
519 sk->sk_data_ready = tipc_topsrv_listener_data_ready; in tipc_topsrv_create_listener()
520 sk->sk_user_data = srv; in tipc_topsrv_create_listener()
521 write_unlock_bh(&sk->sk_callback_lock); in tipc_topsrv_create_listener()
542 /* As server's listening socket owner and creator is the same module, in tipc_topsrv_create_listener()
543 * we have to decrease TIPC module reference count to guarantee that in tipc_topsrv_create_listener()
545 * executing "rmmod" command is unable to make TIPC module deleted in tipc_topsrv_create_listener()
546 * after TIPC module is inserted successfully. in tipc_topsrv_create_listener()
552 * decrement the module reference count twice to ensure that it keeps in tipc_topsrv_create_listener()
554 * must bump the module reference count twice as well before the socket in tipc_topsrv_create_listener()
557 module_put(lsock->ops->owner); in tipc_topsrv_create_listener()
558 module_put(sk->sk_prot_creator->owner); in tipc_topsrv_create_listener()
563 return -EINVAL; in tipc_topsrv_create_listener()
569 struct tipc_subscr sub; in tipc_topsrv_kern_subscr() local
573 sub.seq.type = type; in tipc_topsrv_kern_subscr()
574 sub.seq.lower = lower; in tipc_topsrv_kern_subscr()
575 sub.seq.upper = upper; in tipc_topsrv_kern_subscr()
576 sub.timeout = TIPC_WAIT_FOREVER; in tipc_topsrv_kern_subscr()
577 sub.filter = filter; in tipc_topsrv_kern_subscr()
578 *(u32 *)&sub.usr_handle = port; in tipc_topsrv_kern_subscr()
584 *conid = con->conid; in tipc_topsrv_kern_subscr()
585 con->sock = NULL; in tipc_topsrv_kern_subscr()
586 rc = tipc_conn_rcv_sub(tipc_topsrv(net), con, &sub); in tipc_topsrv_kern_subscr()
601 test_and_clear_bit(CF_CONNECTED, &con->flags); in tipc_topsrv_kern_unsubscr()
609 u32 port = *(u32 *)&evt->s.usr_handle; in tipc_topsrv_kern_evt()
627 s->rcv_wq = alloc_ordered_workqueue("tipc_rcv", 0); in tipc_topsrv_work_start()
628 if (!s->rcv_wq) { in tipc_topsrv_work_start()
630 return -ENOMEM; in tipc_topsrv_work_start()
633 s->send_wq = alloc_ordered_workqueue("tipc_send", 0); in tipc_topsrv_work_start()
634 if (!s->send_wq) { in tipc_topsrv_work_start()
636 destroy_workqueue(s->rcv_wq); in tipc_topsrv_work_start()
637 return -ENOMEM; in tipc_topsrv_work_start()
645 destroy_workqueue(s->rcv_wq); in tipc_topsrv_work_stop()
646 destroy_workqueue(s->send_wq); in tipc_topsrv_work_stop()
658 return -ENOMEM; in tipc_topsrv_start()
660 srv->net = net; in tipc_topsrv_start()
661 srv->max_rcvbuf_size = sizeof(struct tipc_subscr); in tipc_topsrv_start()
662 INIT_WORK(&srv->awork, tipc_topsrv_accept); in tipc_topsrv_start()
664 strscpy(srv->name, name, sizeof(srv->name)); in tipc_topsrv_start()
665 tn->topsrv = srv; in tipc_topsrv_start()
666 atomic_set(&tn->subscription_count, 0); in tipc_topsrv_start()
668 spin_lock_init(&srv->idr_lock); in tipc_topsrv_start()
669 idr_init(&srv->conn_idr); in tipc_topsrv_start()
670 srv->idr_in_use = 0; in tipc_topsrv_start()
686 struct socket *lsock = srv->listener; in tipc_topsrv_stop()
690 spin_lock_bh(&srv->idr_lock); in tipc_topsrv_stop()
691 for (id = 0; srv->idr_in_use; id++) { in tipc_topsrv_stop()
692 con = idr_find(&srv->conn_idr, id); in tipc_topsrv_stop()
694 spin_unlock_bh(&srv->idr_lock); in tipc_topsrv_stop()
696 spin_lock_bh(&srv->idr_lock); in tipc_topsrv_stop()
699 __module_get(lsock->ops->owner); in tipc_topsrv_stop()
700 __module_get(lsock->sk->sk_prot_creator->owner); in tipc_topsrv_stop()
701 srv->listener = NULL; in tipc_topsrv_stop()
702 spin_unlock_bh(&srv->idr_lock); in tipc_topsrv_stop()
705 idr_destroy(&srv->conn_idr); in tipc_topsrv_stop()