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
32 * Copyright (c) 1982, 1986, 1989, 1990, 1993
33 * The Regents of the University of California. All rights reserved.
35 * sendfile(2) and related extensions:
36 * Copyright (c) 1998, David Greenman. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 4. Neither the name of the University nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94
66 * iSCSI Common Layer, kernel proxy part.
69 #ifdef ICL_KERNEL_PROXY
71 #include <sys/param.h>
72 #include <sys/capability.h>
73 #include <sys/condvar.h>
75 #include <sys/kernel.h>
76 #include <sys/kthread.h>
77 #include <sys/malloc.h>
79 #include <sys/socket.h>
80 #include <sys/socketvar.h>
82 #include <sys/systm.h>
83 #include <netinet/in.h>
84 #include <netinet/tcp.h>
85 #include <linux/types.h>
86 #include <rdma/rdma_cm.h>
92 #define ICL_DEBUG(X, ...) \
94 printf("%s: " X "\n", __func__, ## __VA_ARGS__);\
97 #define ICL_WARN(X, ...) \
99 printf("WARNING: %s: " X "\n", \
100 __func__, ## __VA_ARGS__); \
103 static MALLOC_DEFINE(M_ICL_PROXY, "ICL_PROXY", "iSCSI common layer proxy");
106 static int icl_conn_connect_rdma(struct icl_conn *ic, int domain, int socktype,
107 int protocol, struct sockaddr *from_sa, struct sockaddr *to_sa);
108 static int icl_listen_add_rdma(struct icl_listen *il, int domain, int socktype, int protocol,
109 struct sockaddr *sa);
110 #endif /* ICL_RDMA */
113 icl_conn_connect_tcp(struct icl_conn *ic, int domain, int socktype,
114 int protocol, struct sockaddr *from_sa, struct sockaddr *to_sa)
120 error = socreate(domain, &so, socktype, protocol,
121 curthread->td_ucred, curthread);
125 if (from_sa != NULL) {
126 error = sobind(so, from_sa, curthread);
133 error = soconnect(so, to_sa, curthread);
140 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
141 error = msleep(&so->so_timeo, SOCK_MTX(so), PSOCK | PCATCH,
144 if (error == EINTR || error == ERESTART)
150 error = so->so_error;
160 error = icl_conn_handoff_sock(ic, so);
168 icl_conn_connect(struct icl_conn *ic, bool rdma, int domain, int socktype,
169 int protocol, struct sockaddr *from_sa, struct sockaddr *to_sa)
174 return (icl_conn_connect_rdma(ic, domain, socktype, protocol, from_sa, to_sa));
176 ICL_DEBUG("RDMA not supported");
181 return (icl_conn_connect_tcp(ic, domain, socktype, protocol, from_sa, to_sa));
185 icl_listen_new(void (*accept_cb)(struct socket *))
187 struct icl_listen *il;
189 il = malloc(sizeof(*il), M_ICL_PROXY, M_ZERO | M_WAITOK);
190 TAILQ_INIT(&il->il_sockets);
191 sx_init(&il->il_lock, "icl_listen");
192 il->il_accept = accept_cb;
198 icl_listen_free(struct icl_listen *il)
200 struct icl_listen_sock *ils;
202 sx_xlock(&il->il_lock);
203 while (!TAILQ_EMPTY(&il->il_sockets)) {
204 ils = TAILQ_FIRST(&il->il_sockets);
205 while (ils->ils_running) {
206 ICL_DEBUG("waiting for accept thread to terminate");
207 sx_xunlock(&il->il_lock);
208 ils->ils_disconnecting = true;
209 wakeup(&ils->ils_socket->so_timeo);
210 pause("icl_unlisten", 1 * hz);
211 sx_xlock(&il->il_lock);
214 TAILQ_REMOVE(&il->il_sockets, ils, ils_next);
215 soclose(ils->ils_socket);
216 free(ils, M_ICL_PROXY);
218 sx_xunlock(&il->il_lock);
220 free(il, M_ICL_PROXY);
224 * XXX: Doing accept in a separate thread in each socket might not be the best way
225 * to do stuff, but it's pretty clean and debuggable - and you probably won't
226 * have hundreds of listening sockets anyway.
229 icl_accept_thread(void *arg)
231 struct icl_listen_sock *ils;
232 struct socket *head, *so;
237 head = ils->ils_socket;
239 ils->ils_running = true;
243 while (TAILQ_EMPTY(&head->so_comp) && head->so_error == 0 && ils->ils_disconnecting == false) {
244 if (head->so_rcv.sb_state & SBS_CANTRCVMORE) {
245 head->so_error = ECONNABORTED;
248 error = msleep(&head->so_timeo, &accept_mtx, PSOCK | PCATCH,
252 ICL_WARN("msleep failed with error %d", error);
255 if (ils->ils_disconnecting) {
257 ICL_DEBUG("terminating");
258 ils->ils_running = false;
263 if (head->so_error) {
264 error = head->so_error;
267 ICL_WARN("socket error %d", error);
270 so = TAILQ_FIRST(&head->so_comp);
271 KASSERT(so != NULL, ("NULL so"));
272 KASSERT(!(so->so_qstate & SQ_INCOMP), ("accept1: so SQ_INCOMP"));
273 KASSERT(so->so_qstate & SQ_COMP, ("accept1: so not SQ_COMP"));
276 * Before changing the flags on the socket, we have to bump the
277 * reference count. Otherwise, if the protocol calls sofree(),
278 * the socket will be released due to a zero refcount.
280 SOCK_LOCK(so); /* soref() and so_state update */
281 soref(so); /* file descriptor reference */
283 TAILQ_REMOVE(&head->so_comp, so, so_list);
285 so->so_state |= (head->so_state & SS_NBIO);
286 so->so_qstate &= ~SQ_COMP;
293 error = soaccept(so, &sa);
295 ICL_WARN("soaccept error %d", error);
301 (ils->ils_listen->il_accept)(so);
306 icl_listen_add_tcp(struct icl_listen *il, int domain, int socktype, int protocol,
309 struct icl_listen_sock *ils;
314 error = socreate(domain, &so, socktype, protocol,
315 curthread->td_ucred, curthread);
317 ICL_WARN("socreate failed with error %d", error);
321 sopt.sopt_dir = SOPT_SET;
322 sopt.sopt_level = SOL_SOCKET;
323 sopt.sopt_name = SO_REUSEADDR;
324 sopt.sopt_val = &one;
325 sopt.sopt_valsize = sizeof(one);
327 error = sosetopt(so, &sopt);
329 ICL_WARN("failed to set SO_REUSEADDR with error %d", error);
334 error = sobind(so, sa, curthread);
336 ICL_WARN("sobind failed with error %d", error);
341 error = solisten(so, -1, curthread);
343 ICL_WARN("solisten failed with error %d", error);
348 ils = malloc(sizeof(*ils), M_ICL_PROXY, M_ZERO | M_WAITOK);
349 ils->ils_listen = il;
350 ils->ils_socket = so;
352 error = kthread_add(icl_accept_thread, ils, NULL, NULL, 0, 0, "iclacc");
354 ICL_WARN("kthread_add failed with error %d", error);
356 free(ils, M_ICL_PROXY);
361 sx_xlock(&il->il_lock);
362 TAILQ_INSERT_TAIL(&il->il_sockets, ils, ils_next);
363 sx_xunlock(&il->il_lock);
369 icl_listen_add(struct icl_listen *il, bool rdma, int domain, int socktype, int protocol,
375 ICL_DEBUG("RDMA not supported");
378 return (icl_listen_add_rdma(il, domain, socktype, protocol, sa));
383 return (icl_listen_add_tcp(il, domain, socktype, protocol, sa));
387 icl_listen_remove(struct icl_listen *il, struct sockaddr *sa)
397 #endif /* ICL_KERNEL_PROXY */