1 /*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 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. 16 * 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 27 * SUCH DAMAGE. 28 * 29 */ 30 /*- 31 * Copyright (c) 1982, 1986, 1989, 1990, 1993 32 * The Regents of the University of California. All rights reserved. 33 * 34 * sendfile(2) and related extensions: 35 * Copyright (c) 1998, David Greenman. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 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. 48 * 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 59 * SUCH DAMAGE. 60 * 61 * @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94 62 */ 63 64 /* 65 * iSCSI Common Layer, kernel proxy part. 66 */ 67 68 #ifdef ICL_KERNEL_PROXY 69 70 #include <sys/cdefs.h> 71 __FBSDID("$FreeBSD$"); 72 73 #include <sys/param.h> 74 #include <sys/capsicum.h> 75 #include <sys/condvar.h> 76 #include <sys/conf.h> 77 #include <sys/kernel.h> 78 #include <sys/kthread.h> 79 #include <sys/malloc.h> 80 #include <sys/proc.h> 81 #include <sys/socket.h> 82 #include <sys/socketvar.h> 83 #include <sys/sx.h> 84 #include <sys/systm.h> 85 #include <netinet/in.h> 86 #include <netinet/tcp.h> 87 88 #include <dev/iscsi/icl.h> 89 90 struct icl_listen_sock { 91 TAILQ_ENTRY(icl_listen_sock) ils_next; 92 struct icl_listen *ils_listen; 93 struct socket *ils_socket; 94 bool ils_running; 95 int ils_id; 96 }; 97 98 struct icl_listen { 99 TAILQ_HEAD(, icl_listen_sock) il_sockets; 100 struct sx il_lock; 101 void (*il_accept)(struct socket *, 102 struct sockaddr *, int); 103 }; 104 105 static MALLOC_DEFINE(M_ICL_PROXY, "ICL_PROXY", "iSCSI common layer proxy"); 106 107 int 108 icl_soft_proxy_connect(struct icl_conn *ic, int domain, int socktype, 109 int protocol, struct sockaddr *from_sa, struct sockaddr *to_sa) 110 { 111 struct socket *so; 112 int error; 113 int interrupted = 0; 114 115 error = socreate(domain, &so, socktype, protocol, 116 curthread->td_ucred, curthread); 117 if (error != 0) 118 return (error); 119 120 if (from_sa != NULL) { 121 error = sobind(so, from_sa, curthread); 122 if (error != 0) { 123 soclose(so); 124 return (error); 125 } 126 } 127 128 error = soconnect(so, to_sa, curthread); 129 if (error != 0) { 130 soclose(so); 131 return (error); 132 } 133 134 SOCK_LOCK(so); 135 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { 136 error = msleep(&so->so_timeo, SOCK_MTX(so), PSOCK | PCATCH, 137 "icl_connect", 0); 138 if (error) { 139 if (error == EINTR || error == ERESTART) 140 interrupted = 1; 141 break; 142 } 143 } 144 if (error == 0) { 145 error = so->so_error; 146 so->so_error = 0; 147 } 148 SOCK_UNLOCK(so); 149 150 if (error != 0) { 151 soclose(so); 152 return (error); 153 } 154 155 error = icl_soft_handoff_sock(ic, so); 156 if (error != 0) 157 soclose(so); 158 159 return (error); 160 } 161 162 struct icl_listen * 163 icl_listen_new(void (*accept_cb)(struct socket *, struct sockaddr *, int)) 164 { 165 struct icl_listen *il; 166 167 il = malloc(sizeof(*il), M_ICL_PROXY, M_ZERO | M_WAITOK); 168 TAILQ_INIT(&il->il_sockets); 169 sx_init(&il->il_lock, "icl_listen"); 170 il->il_accept = accept_cb; 171 172 return (il); 173 } 174 175 void 176 icl_listen_free(struct icl_listen *il) 177 { 178 struct icl_listen_sock *ils; 179 180 sx_xlock(&il->il_lock); 181 while (!TAILQ_EMPTY(&il->il_sockets)) { 182 ils = TAILQ_FIRST(&il->il_sockets); 183 while (ils->ils_running) { 184 ICL_DEBUG("waiting for accept thread to terminate"); 185 sx_xunlock(&il->il_lock); 186 SOLISTEN_LOCK(ils->ils_socket); 187 ils->ils_socket->so_error = ENOTCONN; 188 SOLISTEN_UNLOCK(ils->ils_socket); 189 wakeup(&ils->ils_socket->so_timeo); 190 pause("icl_unlisten", 1 * hz); 191 sx_xlock(&il->il_lock); 192 } 193 194 TAILQ_REMOVE(&il->il_sockets, ils, ils_next); 195 soclose(ils->ils_socket); 196 free(ils, M_ICL_PROXY); 197 } 198 sx_xunlock(&il->il_lock); 199 200 free(il, M_ICL_PROXY); 201 } 202 203 /* 204 * XXX: Doing accept in a separate thread in each socket might not be the 205 * best way to do stuff, but it's pretty clean and debuggable - and you 206 * probably won't have hundreds of listening sockets anyway. 207 */ 208 static void 209 icl_accept_thread(void *arg) 210 { 211 struct icl_listen_sock *ils; 212 struct socket *head, *so; 213 struct sockaddr *sa; 214 int error; 215 216 ils = arg; 217 head = ils->ils_socket; 218 219 ils->ils_running = true; 220 221 for (;;) { 222 SOLISTEN_LOCK(head); 223 error = solisten_dequeue(head, &so, 0); 224 if (error == ENOTCONN) { 225 /* 226 * XXXGL: ENOTCONN is our mark from icl_listen_free(). 227 * Neither socket code, nor msleep(9) may return it. 228 */ 229 ICL_DEBUG("terminating"); 230 ils->ils_running = false; 231 kthread_exit(); 232 return; 233 } 234 if (error) { 235 ICL_WARN("solisten_dequeue error %d", error); 236 continue; 237 } 238 239 sa = NULL; 240 error = soaccept(so, &sa); 241 if (error != 0) { 242 ICL_WARN("soaccept error %d", error); 243 if (sa != NULL) 244 free(sa, M_SONAME); 245 soclose(so); 246 continue; 247 } 248 249 (ils->ils_listen->il_accept)(so, sa, ils->ils_id); 250 } 251 } 252 253 static int 254 icl_listen_add_tcp(struct icl_listen *il, int domain, int socktype, 255 int protocol, struct sockaddr *sa, int portal_id) 256 { 257 struct icl_listen_sock *ils; 258 struct socket *so; 259 struct sockopt sopt; 260 int error, one = 1; 261 262 error = socreate(domain, &so, socktype, protocol, 263 curthread->td_ucred, curthread); 264 if (error != 0) { 265 ICL_WARN("socreate failed with error %d", error); 266 return (error); 267 } 268 269 sopt.sopt_dir = SOPT_SET; 270 sopt.sopt_level = SOL_SOCKET; 271 sopt.sopt_name = SO_REUSEADDR; 272 sopt.sopt_val = &one; 273 sopt.sopt_valsize = sizeof(one); 274 sopt.sopt_td = NULL; 275 error = sosetopt(so, &sopt); 276 if (error != 0) { 277 ICL_WARN("failed to set SO_REUSEADDR with error %d", error); 278 soclose(so); 279 return (error); 280 } 281 282 error = sobind(so, sa, curthread); 283 if (error != 0) { 284 ICL_WARN("sobind failed with error %d", error); 285 soclose(so); 286 return (error); 287 } 288 289 error = solisten(so, -1, curthread); 290 if (error != 0) { 291 ICL_WARN("solisten failed with error %d", error); 292 soclose(so); 293 return (error); 294 } 295 296 ils = malloc(sizeof(*ils), M_ICL_PROXY, M_ZERO | M_WAITOK); 297 ils->ils_listen = il; 298 ils->ils_socket = so; 299 ils->ils_id = portal_id; 300 301 error = kthread_add(icl_accept_thread, ils, NULL, NULL, 0, 0, "iclacc"); 302 if (error != 0) { 303 ICL_WARN("kthread_add failed with error %d", error); 304 soclose(so); 305 free(ils, M_ICL_PROXY); 306 307 return (error); 308 } 309 310 sx_xlock(&il->il_lock); 311 TAILQ_INSERT_TAIL(&il->il_sockets, ils, ils_next); 312 sx_xunlock(&il->il_lock); 313 314 return (0); 315 } 316 317 int 318 icl_listen_add(struct icl_listen *il, bool rdma, int domain, int socktype, 319 int protocol, struct sockaddr *sa, int portal_id) 320 { 321 322 if (rdma) { 323 ICL_DEBUG("RDMA not supported"); 324 return (EOPNOTSUPP); 325 } 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