1 /*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * 4 * This software was developed by Edward Tomasz Napierala under sponsorship 5 * from the FreeBSD Foundation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 */ 29 /*- 30 * Copyright (c) 1982, 1986, 1989, 1990, 1993 31 * The Regents of the University of California. All rights reserved. 32 * 33 * sendfile(2) and related extensions: 34 * Copyright (c) 1998, David Greenman. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94 61 */ 62 63 /* 64 * iSCSI Common Layer, kernel proxy part. 65 */ 66 67 #ifdef ICL_KERNEL_PROXY 68 69 #include <sys/cdefs.h> 70 __FBSDID("$FreeBSD$"); 71 72 #include <sys/param.h> 73 #include <sys/capsicum.h> 74 #include <sys/condvar.h> 75 #include <sys/conf.h> 76 #include <sys/lock.h> 77 #include <sys/kernel.h> 78 #include <sys/kthread.h> 79 #include <sys/malloc.h> 80 #include <sys/mutex.h> 81 #include <sys/proc.h> 82 #include <sys/socket.h> 83 #include <sys/socketvar.h> 84 #include <sys/sx.h> 85 #include <sys/systm.h> 86 #include <netinet/in.h> 87 #include <netinet/tcp.h> 88 89 #include <dev/iscsi/icl.h> 90 91 struct icl_listen_sock { 92 TAILQ_ENTRY(icl_listen_sock) ils_next; 93 struct icl_listen *ils_listen; 94 struct socket *ils_socket; 95 bool ils_running; 96 int ils_id; 97 }; 98 99 struct icl_listen { 100 TAILQ_HEAD(, icl_listen_sock) il_sockets; 101 struct sx il_lock; 102 void (*il_accept)(struct socket *, 103 struct sockaddr *, int); 104 }; 105 106 static MALLOC_DEFINE(M_ICL_PROXY, "ICL_PROXY", "iSCSI common layer proxy"); 107 108 int 109 icl_soft_proxy_connect(struct icl_conn *ic, int domain, int socktype, 110 int protocol, struct sockaddr *from_sa, struct sockaddr *to_sa) 111 { 112 struct socket *so; 113 int error; 114 int interrupted = 0; 115 116 error = socreate(domain, &so, socktype, protocol, 117 curthread->td_ucred, curthread); 118 if (error != 0) 119 return (error); 120 121 if (from_sa != NULL) { 122 error = sobind(so, from_sa, curthread); 123 if (error != 0) { 124 soclose(so); 125 return (error); 126 } 127 } 128 129 error = soconnect(so, to_sa, curthread); 130 if (error != 0) { 131 soclose(so); 132 return (error); 133 } 134 135 SOCK_LOCK(so); 136 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { 137 error = msleep(&so->so_timeo, SOCK_MTX(so), PSOCK | PCATCH, 138 "icl_connect", 0); 139 if (error) { 140 if (error == EINTR || error == ERESTART) 141 interrupted = 1; 142 break; 143 } 144 } 145 if (error == 0) { 146 error = so->so_error; 147 so->so_error = 0; 148 } 149 SOCK_UNLOCK(so); 150 151 if (error != 0) { 152 soclose(so); 153 return (error); 154 } 155 156 error = icl_soft_handoff_sock(ic, so); 157 if (error != 0) 158 soclose(so); 159 160 return (error); 161 } 162 163 struct icl_listen * 164 icl_listen_new(void (*accept_cb)(struct socket *, struct sockaddr *, int)) 165 { 166 struct icl_listen *il; 167 168 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; 172 173 return (il); 174 } 175 176 void 177 icl_listen_free(struct icl_listen *il) 178 { 179 struct icl_listen_sock *ils; 180 181 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 SOLISTEN_LOCK(ils->ils_socket); 188 ils->ils_socket->so_error = ENOTCONN; 189 SOLISTEN_UNLOCK(ils->ils_socket); 190 wakeup(&ils->ils_socket->so_timeo); 191 pause("icl_unlisten", 1 * hz); 192 sx_xlock(&il->il_lock); 193 } 194 195 TAILQ_REMOVE(&il->il_sockets, ils, ils_next); 196 soclose(ils->ils_socket); 197 free(ils, M_ICL_PROXY); 198 } 199 sx_xunlock(&il->il_lock); 200 201 free(il, M_ICL_PROXY); 202 } 203 204 /* 205 * XXX: Doing accept in a separate thread in each socket might not be the 206 * best way to do stuff, but it's pretty clean and debuggable - and you 207 * probably won't have hundreds of listening sockets anyway. 208 */ 209 static void 210 icl_accept_thread(void *arg) 211 { 212 struct icl_listen_sock *ils; 213 struct socket *head, *so; 214 struct sockaddr *sa; 215 int error; 216 217 ils = arg; 218 head = ils->ils_socket; 219 220 ils->ils_running = true; 221 222 for (;;) { 223 SOLISTEN_LOCK(head); 224 error = solisten_dequeue(head, &so, 0); 225 if (error == ENOTCONN) { 226 /* 227 * XXXGL: ENOTCONN is our mark from icl_listen_free(). 228 * Neither socket code, nor msleep(9) may return it. 229 */ 230 ICL_DEBUG("terminating"); 231 ils->ils_running = false; 232 kthread_exit(); 233 return; 234 } 235 if (error) { 236 ICL_WARN("solisten_dequeue error %d", error); 237 continue; 238 } 239 240 sa = NULL; 241 error = soaccept(so, &sa); 242 if (error != 0) { 243 ICL_WARN("soaccept error %d", error); 244 if (sa != NULL) 245 free(sa, M_SONAME); 246 soclose(so); 247 continue; 248 } 249 250 (ils->ils_listen->il_accept)(so, sa, ils->ils_id); 251 } 252 } 253 254 static int 255 icl_listen_add_tcp(struct icl_listen *il, int domain, int socktype, 256 int protocol, struct sockaddr *sa, int portal_id) 257 { 258 struct icl_listen_sock *ils; 259 struct socket *so; 260 struct sockopt sopt; 261 int error, one = 1; 262 263 error = socreate(domain, &so, socktype, protocol, 264 curthread->td_ucred, curthread); 265 if (error != 0) { 266 ICL_WARN("socreate failed with error %d", error); 267 return (error); 268 } 269 270 sopt.sopt_dir = SOPT_SET; 271 sopt.sopt_level = SOL_SOCKET; 272 sopt.sopt_name = SO_REUSEADDR; 273 sopt.sopt_val = &one; 274 sopt.sopt_valsize = sizeof(one); 275 sopt.sopt_td = NULL; 276 error = sosetopt(so, &sopt); 277 if (error != 0) { 278 ICL_WARN("failed to set SO_REUSEADDR with error %d", error); 279 soclose(so); 280 return (error); 281 } 282 283 error = sobind(so, sa, curthread); 284 if (error != 0) { 285 ICL_WARN("sobind failed with error %d", error); 286 soclose(so); 287 return (error); 288 } 289 290 error = solisten(so, -1, curthread); 291 if (error != 0) { 292 ICL_WARN("solisten failed with error %d", error); 293 soclose(so); 294 return (error); 295 } 296 297 ils = malloc(sizeof(*ils), M_ICL_PROXY, M_ZERO | M_WAITOK); 298 ils->ils_listen = il; 299 ils->ils_socket = so; 300 ils->ils_id = portal_id; 301 302 error = kthread_add(icl_accept_thread, ils, NULL, NULL, 0, 0, "iclacc"); 303 if (error != 0) { 304 ICL_WARN("kthread_add failed with error %d", error); 305 soclose(so); 306 free(ils, M_ICL_PROXY); 307 308 return (error); 309 } 310 311 sx_xlock(&il->il_lock); 312 TAILQ_INSERT_TAIL(&il->il_sockets, ils, ils_next); 313 sx_xunlock(&il->il_lock); 314 315 return (0); 316 } 317 318 int 319 icl_listen_add(struct icl_listen *il, bool rdma, int domain, int socktype, 320 int protocol, struct sockaddr *sa, int portal_id) 321 { 322 323 if (rdma) { 324 ICL_DEBUG("RDMA not supported"); 325 return (EOPNOTSUPP); 326 } 327 328 return (icl_listen_add_tcp(il, domain, socktype, protocol, sa, 329 portal_id)); 330 } 331 332 int 333 icl_listen_remove(struct icl_listen *il, struct sockaddr *sa) 334 { 335 336 /* 337 * XXX 338 */ 339 340 return (EOPNOTSUPP); 341 } 342 343 #endif /* ICL_KERNEL_PROXY */ 344