2 * Copyright (c) 2012 The FreeBSD Foundation
5 * This software was developed by Edward Tomasz Napierala under sponsorship
6 * from the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * Copyright (c) 1982, 1986, 1989, 1990, 1993
32 * The Regents of the University of California. All rights reserved.
34 * sendfile(2) and related extensions:
35 * Copyright (c) 1998, David Greenman. All rights reserved.
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. Neither the name of the University nor the names of its contributors
46 * may be used to endorse or promote products derived from this software
47 * without specific prior written permission.
49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61 * @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94
65 * iSCSI Common Layer, kernel proxy part.
68 #ifdef ICL_KERNEL_PROXY
70 #include <sys/cdefs.h>
71 __FBSDID("$FreeBSD$");
73 #include <sys/param.h>
74 #include <sys/capsicum.h>
75 #include <sys/condvar.h>
77 #include <sys/kernel.h>
78 #include <sys/kthread.h>
79 #include <sys/malloc.h>
81 #include <sys/socket.h>
82 #include <sys/socketvar.h>
84 #include <sys/systm.h>
85 #include <netinet/in.h>
86 #include <netinet/tcp.h>
88 #include <dev/iscsi/icl.h>
90 struct icl_listen_sock {
91 TAILQ_ENTRY(icl_listen_sock) ils_next;
92 struct icl_listen *ils_listen;
93 struct socket *ils_socket;
95 bool ils_disconnecting;
100 TAILQ_HEAD(, icl_listen_sock) il_sockets;
102 void (*il_accept)(struct socket *,
103 struct sockaddr *, int);
106 static MALLOC_DEFINE(M_ICL_PROXY, "ICL_PROXY", "iSCSI common layer proxy");
109 icl_soft_proxy_connect(struct icl_conn *ic, int domain, int socktype,
110 int protocol, struct sockaddr *from_sa, struct sockaddr *to_sa)
116 error = socreate(domain, &so, socktype, protocol,
117 curthread->td_ucred, curthread);
121 if (from_sa != NULL) {
122 error = sobind(so, from_sa, curthread);
129 error = soconnect(so, to_sa, curthread);
136 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
137 error = msleep(&so->so_timeo, SOCK_MTX(so), PSOCK | PCATCH,
140 if (error == EINTR || error == ERESTART)
146 error = so->so_error;
156 error = icl_soft_handoff_sock(ic, so);
164 icl_listen_new(void (*accept_cb)(struct socket *, struct sockaddr *, int))
166 struct icl_listen *il;
168 il = malloc(sizeof(*il), M_ICL_PROXY, M_ZERO | M_WAITOK);
169 TAILQ_INIT(&il->il_sockets);
170 sx_init(&il->il_lock, "icl_listen");
171 il->il_accept = accept_cb;
177 icl_listen_free(struct icl_listen *il)
179 struct icl_listen_sock *ils;
181 sx_xlock(&il->il_lock);
182 while (!TAILQ_EMPTY(&il->il_sockets)) {
183 ils = TAILQ_FIRST(&il->il_sockets);
184 while (ils->ils_running) {
185 ICL_DEBUG("waiting for accept thread to terminate");
186 sx_xunlock(&il->il_lock);
187 ils->ils_disconnecting = true;
188 wakeup(&ils->ils_socket->so_timeo);
189 pause("icl_unlisten", 1 * hz);
190 sx_xlock(&il->il_lock);
193 TAILQ_REMOVE(&il->il_sockets, ils, ils_next);
194 soclose(ils->ils_socket);
195 free(ils, M_ICL_PROXY);
197 sx_xunlock(&il->il_lock);
199 free(il, M_ICL_PROXY);
203 * XXX: Doing accept in a separate thread in each socket might not be the best way
204 * to do stuff, but it's pretty clean and debuggable - and you probably won't
205 * have hundreds of listening sockets anyway.
208 icl_accept_thread(void *arg)
210 struct icl_listen_sock *ils;
211 struct socket *head, *so;
216 head = ils->ils_socket;
218 ils->ils_running = true;
222 while (TAILQ_EMPTY(&head->so_comp) && head->so_error == 0 && ils->ils_disconnecting == false) {
223 if (head->so_rcv.sb_state & SBS_CANTRCVMORE) {
224 head->so_error = ECONNABORTED;
227 error = msleep(&head->so_timeo, &accept_mtx, PSOCK | PCATCH,
231 ICL_WARN("msleep failed with error %d", error);
234 if (ils->ils_disconnecting) {
236 ICL_DEBUG("terminating");
237 ils->ils_running = false;
242 if (head->so_error) {
243 error = head->so_error;
246 ICL_WARN("socket error %d", error);
249 so = TAILQ_FIRST(&head->so_comp);
250 KASSERT(so != NULL, ("NULL so"));
251 KASSERT(!(so->so_qstate & SQ_INCOMP), ("accept1: so SQ_INCOMP"));
252 KASSERT(so->so_qstate & SQ_COMP, ("accept1: so not SQ_COMP"));
255 * Before changing the flags on the socket, we have to bump the
256 * reference count. Otherwise, if the protocol calls sofree(),
257 * the socket will be released due to a zero refcount.
259 SOCK_LOCK(so); /* soref() and so_state update */
260 soref(so); /* file descriptor reference */
262 TAILQ_REMOVE(&head->so_comp, so, so_list);
264 so->so_state |= (head->so_state & SS_NBIO);
265 so->so_qstate &= ~SQ_COMP;
272 error = soaccept(so, &sa);
274 ICL_WARN("soaccept error %d", error);
281 (ils->ils_listen->il_accept)(so, sa, ils->ils_id);
286 icl_listen_add_tcp(struct icl_listen *il, int domain, int socktype,
287 int protocol, struct sockaddr *sa, int portal_id)
289 struct icl_listen_sock *ils;
294 error = socreate(domain, &so, socktype, protocol,
295 curthread->td_ucred, curthread);
297 ICL_WARN("socreate failed with error %d", error);
301 sopt.sopt_dir = SOPT_SET;
302 sopt.sopt_level = SOL_SOCKET;
303 sopt.sopt_name = SO_REUSEADDR;
304 sopt.sopt_val = &one;
305 sopt.sopt_valsize = sizeof(one);
307 error = sosetopt(so, &sopt);
309 ICL_WARN("failed to set SO_REUSEADDR with error %d", error);
314 error = sobind(so, sa, curthread);
316 ICL_WARN("sobind failed with error %d", error);
321 error = solisten(so, -1, curthread);
323 ICL_WARN("solisten failed with error %d", error);
328 ils = malloc(sizeof(*ils), M_ICL_PROXY, M_ZERO | M_WAITOK);
329 ils->ils_listen = il;
330 ils->ils_socket = so;
331 ils->ils_id = portal_id;
333 error = kthread_add(icl_accept_thread, ils, NULL, NULL, 0, 0, "iclacc");
335 ICL_WARN("kthread_add failed with error %d", error);
337 free(ils, M_ICL_PROXY);
342 sx_xlock(&il->il_lock);
343 TAILQ_INSERT_TAIL(&il->il_sockets, ils, ils_next);
344 sx_xunlock(&il->il_lock);
350 icl_listen_add(struct icl_listen *il, bool rdma, int domain, int socktype,
351 int protocol, struct sockaddr *sa, int portal_id)
355 ICL_DEBUG("RDMA not supported");
360 return (icl_listen_add_tcp(il, domain, socktype, protocol, sa,
365 icl_listen_remove(struct icl_listen *il, struct sockaddr *sa)
375 #endif /* ICL_KERNEL_PROXY */