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 * $FreeBSD$ 30 */ 31 32 /* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/param.h> 40 #include <sys/capsicum.h> 41 #include <sys/condvar.h> 42 #include <sys/file.h> 43 #include <sys/kernel.h> 44 #include <sys/kthread.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/module.h> 48 #include <sys/mutex.h> 49 #include <sys/queue.h> 50 #include <sys/sbuf.h> 51 #include <sys/sysctl.h> 52 #include <sys/systm.h> 53 #include <sys/uio.h> 54 #include <sys/unistd.h> 55 #include <vm/uma.h> 56 57 #include <cam/scsi/scsi_all.h> 58 #include <cam/scsi/scsi_da.h> 59 #include <cam/ctl/ctl_io.h> 60 #include <cam/ctl/ctl.h> 61 #include <cam/ctl/ctl_backend.h> 62 #include <cam/ctl/ctl_error.h> 63 #include <cam/ctl/ctl_frontend.h> 64 #include <cam/ctl/ctl_frontend_internal.h> 65 #include <cam/ctl/ctl_debug.h> 66 #include <cam/ctl/ctl_ha.h> 67 #include <cam/ctl/ctl_ioctl.h> 68 #include <cam/ctl/ctl_private.h> 69 70 #include "../../dev/iscsi/icl.h" 71 #include "../../dev/iscsi/iscsi_proto.h" 72 #include "ctl_frontend_iscsi.h" 73 74 #ifdef ICL_KERNEL_PROXY 75 #include <sys/socketvar.h> 76 #endif 77 78 #ifdef ICL_KERNEL_PROXY 79 FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80 #endif 81 82 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83 static uma_zone_t cfiscsi_data_wait_zone; 84 85 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87 static int debug = 3; 88 TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91 static int ping_timeout = 5; 92 TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 93 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95 static int login_timeout = 60; 96 TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99 static int maxcmdsn_delta = 256; 100 TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105 #define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113 #define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121 #define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130 #define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139 #define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140 #define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141 #define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143 #define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144 #define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145 #define PDU_EXPDATASN(X) (X)->ip_prv0 146 #define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147 #define PDU_R2TSN(X) (X)->ip_prv2 148 149 int cfiscsi_init(void); 150 static void cfiscsi_online(void *arg); 151 static void cfiscsi_offline(void *arg); 152 static int cfiscsi_targ_enable(void *arg, struct ctl_id targ_id); 153 static int cfiscsi_targ_disable(void *arg, struct ctl_id targ_id); 154 static int cfiscsi_lun_enable(void *arg, 155 struct ctl_id target_id, int lun_id); 156 static int cfiscsi_lun_disable(void *arg, 157 struct ctl_id target_id, int lun_id); 158 static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160 static int cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len); 161 static void cfiscsi_datamove(union ctl_io *io); 162 static void cfiscsi_done(union ctl_io *io); 163 static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun); 164 static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 165 static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 166 static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 167 static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 168 static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 169 static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 170 static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 171 static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 172 *softc, const char *name); 173 static void cfiscsi_target_release(struct cfiscsi_target *ct); 174 static void cfiscsi_session_delete(struct cfiscsi_session *cs); 175 176 static struct cfiscsi_softc cfiscsi_softc; 177 extern struct ctl_softc *control_softc; 178 179 static int cfiscsi_module_event_handler(module_t, int /*modeventtype_t*/, void *); 180 181 static moduledata_t cfiscsi_moduledata = { 182 "ctlcfiscsi", 183 cfiscsi_module_event_handler, 184 NULL 185 }; 186 187 DECLARE_MODULE(ctlcfiscsi, cfiscsi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH); 188 MODULE_VERSION(ctlcfiscsi, 1); 189 MODULE_DEPEND(ctlcfiscsi, ctl, 1, 1, 1); 190 MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 191 192 static struct icl_pdu * 193 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 194 { 195 196 return (icl_pdu_new_bhs(request->ip_conn, flags)); 197 } 198 199 static bool 200 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 201 { 202 const struct iscsi_bhs_scsi_command *bhssc; 203 struct cfiscsi_session *cs; 204 uint32_t cmdsn, expstatsn; 205 206 cs = PDU_SESSION(request); 207 208 /* 209 * Every incoming PDU - not just NOP-Out - resets the ping timer. 210 * The purpose of the timeout is to reset the connection when it stalls; 211 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 212 * in some queue. 213 * 214 * XXX: Locking? 215 */ 216 cs->cs_timeout = 0; 217 218 /* 219 * Data-Out PDUs don't contain CmdSN. 220 */ 221 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 222 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 223 return (false); 224 225 /* 226 * We're only using fields common for all the request 227 * (initiator -> target) PDUs. 228 */ 229 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 230 cmdsn = ntohl(bhssc->bhssc_cmdsn); 231 expstatsn = ntohl(bhssc->bhssc_expstatsn); 232 233 CFISCSI_SESSION_LOCK(cs); 234 #if 0 235 if (expstatsn != cs->cs_statsn) { 236 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 237 "while current StatSN is %d", expstatsn, 238 cs->cs_statsn); 239 } 240 #endif 241 242 /* 243 * The target MUST silently ignore any non-immediate command outside 244 * of this range. 245 */ 246 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 247 CFISCSI_SESSION_UNLOCK(cs); 248 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 249 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 250 return (true); 251 } 252 253 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 254 cs->cs_cmdsn++; 255 256 CFISCSI_SESSION_UNLOCK(cs); 257 258 return (false); 259 } 260 261 static void 262 cfiscsi_pdu_handle(struct icl_pdu *request) 263 { 264 struct cfiscsi_session *cs; 265 bool ignore; 266 267 cs = PDU_SESSION(request); 268 269 ignore = cfiscsi_pdu_update_cmdsn(request); 270 if (ignore) { 271 icl_pdu_free(request); 272 return; 273 } 274 275 /* 276 * Handle the PDU; this includes e.g. receiving the remaining 277 * part of PDU and submitting the SCSI command to CTL 278 * or queueing a reply. The handling routine is responsible 279 * for freeing the PDU when it's no longer needed. 280 */ 281 switch (request->ip_bhs->bhs_opcode & 282 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 283 case ISCSI_BHS_OPCODE_NOP_OUT: 284 cfiscsi_pdu_handle_nop_out(request); 285 break; 286 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 287 cfiscsi_pdu_handle_scsi_command(request); 288 break; 289 case ISCSI_BHS_OPCODE_TASK_REQUEST: 290 cfiscsi_pdu_handle_task_request(request); 291 break; 292 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 293 cfiscsi_pdu_handle_data_out(request); 294 break; 295 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 296 cfiscsi_pdu_handle_logout_request(request); 297 break; 298 default: 299 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 300 "opcode 0x%x; dropping connection", 301 request->ip_bhs->bhs_opcode); 302 icl_pdu_free(request); 303 cfiscsi_session_terminate(cs); 304 } 305 306 } 307 308 static void 309 cfiscsi_receive_callback(struct icl_pdu *request) 310 { 311 struct cfiscsi_session *cs; 312 313 cs = PDU_SESSION(request); 314 315 #ifdef ICL_KERNEL_PROXY 316 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 317 if (cs->cs_login_pdu == NULL) 318 cs->cs_login_pdu = request; 319 else 320 icl_pdu_free(request); 321 cv_signal(&cs->cs_login_cv); 322 return; 323 } 324 #endif 325 326 cfiscsi_pdu_handle(request); 327 } 328 329 static void 330 cfiscsi_error_callback(struct icl_conn *ic) 331 { 332 struct cfiscsi_session *cs; 333 334 cs = CONN_SESSION(ic); 335 336 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 337 cfiscsi_session_terminate(cs); 338 } 339 340 static int 341 cfiscsi_pdu_prepare(struct icl_pdu *response) 342 { 343 struct cfiscsi_session *cs; 344 struct iscsi_bhs_scsi_response *bhssr; 345 bool advance_statsn = true; 346 347 cs = PDU_SESSION(response); 348 349 CFISCSI_SESSION_LOCK_ASSERT(cs); 350 351 /* 352 * We're only using fields common for all the response 353 * (target -> initiator) PDUs. 354 */ 355 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 356 357 /* 358 * 10.8.3: "The StatSN for this connection is not advanced 359 * after this PDU is sent." 360 */ 361 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 362 advance_statsn = false; 363 364 /* 365 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 366 * StatSN for the connection is not advanced after this PDU is sent." 367 */ 368 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 369 bhssr->bhssr_initiator_task_tag == 0xffffffff) 370 advance_statsn = false; 371 372 /* 373 * See the comment below - StatSN is not meaningful and must 374 * not be advanced. 375 */ 376 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 377 advance_statsn = false; 378 379 /* 380 * 10.7.3: "The fields StatSN, Status, and Residual Count 381 * only have meaningful content if the S bit is set to 1." 382 */ 383 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 384 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 385 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 386 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 387 388 if (advance_statsn) 389 cs->cs_statsn++; 390 391 return (0); 392 } 393 394 static void 395 cfiscsi_pdu_queue(struct icl_pdu *response) 396 { 397 struct cfiscsi_session *cs; 398 399 cs = PDU_SESSION(response); 400 401 CFISCSI_SESSION_LOCK(cs); 402 cfiscsi_pdu_prepare(response); 403 icl_pdu_queue(response); 404 CFISCSI_SESSION_UNLOCK(cs); 405 } 406 407 static uint32_t 408 cfiscsi_decode_lun(uint64_t encoded) 409 { 410 uint8_t lun[8]; 411 uint32_t result; 412 413 /* 414 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 415 * but is in fact an evil, multidimensional structure defined 416 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 417 */ 418 memcpy(lun, &encoded, sizeof(lun)); 419 switch (lun[0] & 0xC0) { 420 case 0x00: 421 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 422 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 423 CFISCSI_WARN("malformed LUN " 424 "(peripheral device addressing method): 0x%jx", 425 (uintmax_t)encoded); 426 result = 0xffffffff; 427 break; 428 } 429 result = lun[1]; 430 break; 431 case 0x40: 432 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 433 lun[6] != 0 || lun[7] != 0) { 434 CFISCSI_WARN("malformed LUN " 435 "(flat address space addressing method): 0x%jx", 436 (uintmax_t)encoded); 437 result = 0xffffffff; 438 break; 439 } 440 result = ((lun[0] & 0x3f) << 8) + lun[1]; 441 break; 442 case 0xC0: 443 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 444 lun[6] != 0 || lun[7] != 0) { 445 CFISCSI_WARN("malformed LUN (extended flat " 446 "address space addressing method): 0x%jx", 447 (uintmax_t)encoded); 448 result = 0xffffffff; 449 break; 450 } 451 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 452 default: 453 CFISCSI_WARN("unsupported LUN format 0x%jx", 454 (uintmax_t)encoded); 455 result = 0xffffffff; 456 break; 457 } 458 459 return (result); 460 } 461 462 static void 463 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 464 { 465 struct cfiscsi_session *cs; 466 struct iscsi_bhs_nop_out *bhsno; 467 struct iscsi_bhs_nop_in *bhsni; 468 struct icl_pdu *response; 469 void *data = NULL; 470 size_t datasize; 471 int error; 472 473 cs = PDU_SESSION(request); 474 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 475 476 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 477 /* 478 * Nothing to do, iscsi_pdu_update_statsn() already 479 * zeroed the timeout. 480 */ 481 icl_pdu_free(request); 482 return; 483 } 484 485 datasize = icl_pdu_data_segment_length(request); 486 if (datasize > 0) { 487 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 488 if (data == NULL) { 489 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 490 "dropping connection"); 491 icl_pdu_free(request); 492 cfiscsi_session_terminate(cs); 493 return; 494 } 495 icl_pdu_get_data(request, 0, data, datasize); 496 } 497 498 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 499 if (response == NULL) { 500 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 501 "droppping connection"); 502 free(data, M_CFISCSI); 503 icl_pdu_free(request); 504 cfiscsi_session_terminate(cs); 505 return; 506 } 507 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 508 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 509 bhsni->bhsni_flags = 0x80; 510 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 511 bhsni->bhsni_target_transfer_tag = 0xffffffff; 512 if (datasize > 0) { 513 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 514 if (error != 0) { 515 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 516 "dropping connection"); 517 free(data, M_CFISCSI); 518 icl_pdu_free(request); 519 icl_pdu_free(response); 520 cfiscsi_session_terminate(cs); 521 return; 522 } 523 free(data, M_CFISCSI); 524 } 525 526 icl_pdu_free(request); 527 cfiscsi_pdu_queue(response); 528 } 529 530 static void 531 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 532 { 533 struct iscsi_bhs_scsi_command *bhssc; 534 struct cfiscsi_session *cs; 535 union ctl_io *io; 536 int error; 537 538 cs = PDU_SESSION(request); 539 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 540 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 541 // bhssc->bhssc_initiator_task_tag); 542 543 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 544 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 545 "ImmediateData=No; dropping connection"); 546 icl_pdu_free(request); 547 cfiscsi_session_terminate(cs); 548 return; 549 } 550 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 551 if (io == NULL) { 552 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 553 "dropping connection"); 554 icl_pdu_free(request); 555 cfiscsi_session_terminate(cs); 556 return; 557 } 558 ctl_zero_io(io); 559 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 560 io->io_hdr.io_type = CTL_IO_SCSI; 561 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 562 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 563 io->io_hdr.nexus.targ_target.id = 0; 564 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 565 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 566 io->io_hdr.nexus.lun_map_arg = cs; 567 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 568 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 569 case BHSSC_FLAGS_ATTR_UNTAGGED: 570 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 571 break; 572 case BHSSC_FLAGS_ATTR_SIMPLE: 573 io->scsiio.tag_type = CTL_TAG_SIMPLE; 574 break; 575 case BHSSC_FLAGS_ATTR_ORDERED: 576 io->scsiio.tag_type = CTL_TAG_ORDERED; 577 break; 578 case BHSSC_FLAGS_ATTR_HOQ: 579 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 580 break; 581 case BHSSC_FLAGS_ATTR_ACA: 582 io->scsiio.tag_type = CTL_TAG_ACA; 583 break; 584 default: 585 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 586 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 587 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 588 break; 589 } 590 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 591 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 592 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 593 error = ctl_queue(io); 594 if (error != CTL_RETVAL_COMPLETE) { 595 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 596 "dropping connection", error); 597 ctl_free_io(io); 598 refcount_release(&cs->cs_outstanding_ctl_pdus); 599 icl_pdu_free(request); 600 cfiscsi_session_terminate(cs); 601 } 602 } 603 604 static void 605 cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 606 { 607 struct iscsi_bhs_task_management_request *bhstmr; 608 struct iscsi_bhs_task_management_response *bhstmr2; 609 struct icl_pdu *response; 610 struct cfiscsi_session *cs; 611 union ctl_io *io; 612 int error; 613 614 cs = PDU_SESSION(request); 615 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 616 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 617 if (io == NULL) { 618 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 619 "dropping connection"); 620 icl_pdu_free(request); 621 cfiscsi_session_terminate(cs); 622 return; 623 } 624 ctl_zero_io(io); 625 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 626 io->io_hdr.io_type = CTL_IO_TASK; 627 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 628 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 629 io->io_hdr.nexus.targ_target.id = 0; 630 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 631 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 632 io->io_hdr.nexus.lun_map_arg = cs; 633 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 634 635 switch (bhstmr->bhstmr_function & ~0x80) { 636 case BHSTMR_FUNCTION_ABORT_TASK: 637 #if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 639 #endif 640 io->taskio.task_action = CTL_TASK_ABORT_TASK; 641 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 642 break; 643 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 644 #if 0 645 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 646 #endif 647 io->taskio.task_action = CTL_TASK_LUN_RESET; 648 break; 649 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 650 #if 0 651 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 652 #endif 653 io->taskio.task_action = CTL_TASK_TARGET_RESET; 654 break; 655 default: 656 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 657 bhstmr->bhstmr_function & ~0x80); 658 ctl_free_io(io); 659 660 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 661 if (response == NULL) { 662 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 663 "dropping connection"); 664 icl_pdu_free(request); 665 cfiscsi_session_terminate(cs); 666 return; 667 } 668 bhstmr2 = (struct iscsi_bhs_task_management_response *) 669 response->ip_bhs; 670 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 671 bhstmr2->bhstmr_flags = 0x80; 672 bhstmr2->bhstmr_response = 673 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 674 bhstmr2->bhstmr_initiator_task_tag = 675 bhstmr->bhstmr_initiator_task_tag; 676 icl_pdu_free(request); 677 cfiscsi_pdu_queue(response); 678 return; 679 } 680 681 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 682 error = ctl_queue(io); 683 if (error != CTL_RETVAL_COMPLETE) { 684 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 685 "dropping connection", error); 686 ctl_free_io(io); 687 refcount_release(&cs->cs_outstanding_ctl_pdus); 688 icl_pdu_free(request); 689 cfiscsi_session_terminate(cs); 690 } 691 } 692 693 static bool 694 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 695 { 696 struct iscsi_bhs_data_out *bhsdo; 697 struct cfiscsi_session *cs; 698 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 699 size_t copy_len, len, off, buffer_offset; 700 int ctl_sg_count; 701 union ctl_io *io; 702 703 cs = PDU_SESSION(request); 704 705 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 706 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 707 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 708 ISCSI_BHS_OPCODE_SCSI_COMMAND, 709 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 710 711 /* 712 * We're only using fields common for Data-Out and SCSI Command PDUs. 713 */ 714 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 715 716 io = cdw->cdw_ctl_io; 717 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 718 ("CTL_FLAG_DATA_IN")); 719 720 #if 0 721 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 722 request->ip_data_len, io->scsiio.kern_total_len); 723 #endif 724 725 if (io->scsiio.kern_sg_entries > 0) { 726 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 727 ctl_sg_count = io->scsiio.kern_sg_entries; 728 } else { 729 ctl_sglist = &ctl_sg_entry; 730 ctl_sglist->addr = io->scsiio.kern_data_ptr; 731 ctl_sglist->len = io->scsiio.kern_data_len; 732 ctl_sg_count = 1; 733 } 734 735 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 736 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 737 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 738 else 739 buffer_offset = 0; 740 741 /* 742 * Make sure the offset, as sent by the initiator, matches the offset 743 * we're supposed to be at in the scatter-gather list. 744 */ 745 if (buffer_offset != 746 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 747 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 748 "expected %zd; dropping connection", buffer_offset, 749 (size_t)io->scsiio.kern_rel_offset + 750 (size_t)io->scsiio.ext_data_filled); 751 ctl_set_data_phase_error(&io->scsiio); 752 cfiscsi_session_terminate(cs); 753 return (true); 754 } 755 756 /* 757 * This is the offset within the PDU data segment, as opposed 758 * to buffer_offset, which is the offset within the task (SCSI 759 * command). 760 */ 761 off = 0; 762 len = icl_pdu_data_segment_length(request); 763 764 /* 765 * Iterate over the scatter/gather segments, filling them with data 766 * from the PDU data segment. Note that this can get called multiple 767 * times for one SCSI command; the cdw structure holds state for the 768 * scatter/gather list. 769 */ 770 for (;;) { 771 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 772 ("cdw->cdw_sg_index >= ctl_sg_count")); 773 if (cdw->cdw_sg_len == 0) { 774 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 775 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 776 } 777 KASSERT(off <= len, ("len > off")); 778 copy_len = len - off; 779 if (copy_len > cdw->cdw_sg_len) 780 copy_len = cdw->cdw_sg_len; 781 782 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 783 cdw->cdw_sg_addr += copy_len; 784 cdw->cdw_sg_len -= copy_len; 785 off += copy_len; 786 io->scsiio.ext_data_filled += copy_len; 787 788 if (cdw->cdw_sg_len == 0) { 789 /* 790 * End of current segment. 791 */ 792 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 793 /* 794 * Last segment in scatter/gather list. 795 */ 796 break; 797 } 798 cdw->cdw_sg_index++; 799 } 800 801 if (off == len) { 802 /* 803 * End of PDU payload. 804 */ 805 break; 806 } 807 } 808 809 if (len > off) { 810 /* 811 * In case of unsolicited data, it's possible that the buffer 812 * provided by CTL is smaller than negotiated FirstBurstLength. 813 * Just ignore the superfluous data; will ask for them with R2T 814 * on next call to cfiscsi_datamove(). 815 * 816 * This obviously can only happen with SCSI Command PDU. 817 */ 818 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 819 ISCSI_BHS_OPCODE_SCSI_COMMAND) { 820 CFISCSI_SESSION_DEBUG(cs, "received too much immediate " 821 "data: got %zd bytes, expected %zd", 822 icl_pdu_data_segment_length(request), off); 823 return (true); 824 } 825 826 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 827 "expected %zd; dropping connection", 828 icl_pdu_data_segment_length(request), off); 829 ctl_set_data_phase_error(&io->scsiio); 830 cfiscsi_session_terminate(cs); 831 return (true); 832 } 833 834 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len && 835 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 836 CFISCSI_SESSION_WARN(cs, "got the final packet without " 837 "the F flag; flags = 0x%x; dropping connection", 838 bhsdo->bhsdo_flags); 839 ctl_set_data_phase_error(&io->scsiio); 840 cfiscsi_session_terminate(cs); 841 return (true); 842 } 843 844 if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len && 845 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 846 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 847 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 848 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 849 "transmitted size was %zd bytes instead of %d; " 850 "dropping connection", 851 (size_t)io->scsiio.ext_data_filled, 852 io->scsiio.kern_data_len); 853 ctl_set_data_phase_error(&io->scsiio); 854 cfiscsi_session_terminate(cs); 855 return (true); 856 } else { 857 /* 858 * For SCSI Command PDU, this just means we need to 859 * solicit more data by sending R2T. 860 */ 861 return (false); 862 } 863 } 864 865 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) { 866 #if 0 867 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 868 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 869 #endif 870 871 return (true); 872 } 873 874 return (false); 875 } 876 877 static void 878 cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 879 { 880 struct iscsi_bhs_data_out *bhsdo; 881 struct cfiscsi_session *cs; 882 struct cfiscsi_data_wait *cdw = NULL; 883 union ctl_io *io; 884 bool done; 885 886 cs = PDU_SESSION(request); 887 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 888 889 CFISCSI_SESSION_LOCK(cs); 890 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 891 #if 0 892 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 893 "ttt 0x%x, itt 0x%x", 894 bhsdo->bhsdo_target_transfer_tag, 895 bhsdo->bhsdo_initiator_task_tag, 896 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 897 #endif 898 if (bhsdo->bhsdo_target_transfer_tag == 899 cdw->cdw_target_transfer_tag) 900 break; 901 } 902 CFISCSI_SESSION_UNLOCK(cs); 903 if (cdw == NULL) { 904 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 905 "0x%x, not found; dropping connection", 906 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 907 icl_pdu_free(request); 908 cfiscsi_session_terminate(cs); 909 return; 910 } 911 912 io = cdw->cdw_ctl_io; 913 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 914 ("CTL_FLAG_DATA_IN")); 915 916 done = cfiscsi_handle_data_segment(request, cdw); 917 if (done) { 918 CFISCSI_SESSION_LOCK(cs); 919 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 920 CFISCSI_SESSION_UNLOCK(cs); 921 uma_zfree(cfiscsi_data_wait_zone, cdw); 922 io->scsiio.be_move_done(io); 923 } 924 925 icl_pdu_free(request); 926 } 927 928 static void 929 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 930 { 931 struct iscsi_bhs_logout_request *bhslr; 932 struct iscsi_bhs_logout_response *bhslr2; 933 struct icl_pdu *response; 934 struct cfiscsi_session *cs; 935 936 cs = PDU_SESSION(request); 937 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 938 switch (bhslr->bhslr_reason & 0x7f) { 939 case BHSLR_REASON_CLOSE_SESSION: 940 case BHSLR_REASON_CLOSE_CONNECTION: 941 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 942 if (response == NULL) { 943 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 944 icl_pdu_free(request); 945 cfiscsi_session_terminate(cs); 946 return; 947 } 948 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 949 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 950 bhslr2->bhslr_flags = 0x80; 951 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 952 bhslr2->bhslr_initiator_task_tag = 953 bhslr->bhslr_initiator_task_tag; 954 icl_pdu_free(request); 955 cfiscsi_pdu_queue(response); 956 cfiscsi_session_terminate(cs); 957 break; 958 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 959 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 960 if (response == NULL) { 961 CFISCSI_SESSION_WARN(cs, 962 "failed to allocate memory; dropping connection"); 963 icl_pdu_free(request); 964 cfiscsi_session_terminate(cs); 965 return; 966 } 967 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 968 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 969 bhslr2->bhslr_flags = 0x80; 970 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 971 bhslr2->bhslr_initiator_task_tag = 972 bhslr->bhslr_initiator_task_tag; 973 icl_pdu_free(request); 974 cfiscsi_pdu_queue(response); 975 break; 976 default: 977 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 978 bhslr->bhslr_reason); 979 icl_pdu_free(request); 980 cfiscsi_session_terminate(cs); 981 break; 982 } 983 } 984 985 static void 986 cfiscsi_callout(void *context) 987 { 988 struct icl_pdu *cp; 989 struct iscsi_bhs_nop_in *bhsni; 990 struct cfiscsi_session *cs; 991 992 cs = context; 993 994 if (cs->cs_terminating) 995 return; 996 997 callout_schedule(&cs->cs_callout, 1 * hz); 998 999 atomic_add_int(&cs->cs_timeout, 1); 1000 1001 #ifdef ICL_KERNEL_PROXY 1002 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1003 if (cs->cs_timeout > login_timeout) { 1004 CFISCSI_SESSION_WARN(cs, "login timed out after " 1005 "%d seconds; dropping connection", cs->cs_timeout); 1006 cfiscsi_session_terminate(cs); 1007 } 1008 return; 1009 } 1010 #endif 1011 1012 if (cs->cs_timeout >= ping_timeout) { 1013 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1014 "dropping connection", ping_timeout); 1015 cfiscsi_session_terminate(cs); 1016 return; 1017 } 1018 1019 /* 1020 * If the ping was reset less than one second ago - which means 1021 * that we've received some PDU during the last second - assume 1022 * the traffic flows correctly and don't bother sending a NOP-Out. 1023 * 1024 * (It's 2 - one for one second, and one for incrementing is_timeout 1025 * earlier in this routine.) 1026 */ 1027 if (cs->cs_timeout < 2) 1028 return; 1029 1030 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1031 if (cp == NULL) { 1032 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1033 return; 1034 } 1035 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1036 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1037 bhsni->bhsni_flags = 0x80; 1038 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1039 1040 cfiscsi_pdu_queue(cp); 1041 } 1042 1043 static void 1044 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1045 { 1046 struct cfiscsi_data_wait *cdw, *tmpcdw; 1047 union ctl_io *io; 1048 int error; 1049 1050 #ifdef notyet 1051 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1052 if (io == NULL) { 1053 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1054 return; 1055 } 1056 ctl_zero_io(io); 1057 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1058 io->io_hdr.io_type = CTL_IO_TASK; 1059 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1060 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1061 io->io_hdr.nexus.targ_target.id = 0; 1062 io->io_hdr.nexus.targ_lun = lun; 1063 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1064 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1065 error = ctl_queue(io); 1066 if (error != CTL_RETVAL_COMPLETE) { 1067 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1068 ctl_free_io(io); 1069 } 1070 #else 1071 /* 1072 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1073 * just iterate over tasks that are waiting for something - data - and 1074 * terminate those. 1075 */ 1076 CFISCSI_SESSION_LOCK(cs); 1077 TAILQ_FOREACH_SAFE(cdw, 1078 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1079 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1080 if (io == NULL) { 1081 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1082 return; 1083 } 1084 ctl_zero_io(io); 1085 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1086 io->io_hdr.io_type = CTL_IO_TASK; 1087 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1088 io->io_hdr.nexus.targ_port = 1089 cs->cs_target->ct_softc->fe.targ_port; 1090 io->io_hdr.nexus.targ_target.id = 0; 1091 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1092 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1093 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1094 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1095 error = ctl_queue(io); 1096 if (error != CTL_RETVAL_COMPLETE) { 1097 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1098 ctl_free_io(io); 1099 return; 1100 } 1101 #if 0 1102 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1103 "0x%x", cdw->cdw_initiator_task_tag); 1104 #endif 1105 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1106 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1107 uma_zfree(cfiscsi_data_wait_zone, cdw); 1108 } 1109 CFISCSI_SESSION_UNLOCK(cs); 1110 #endif 1111 } 1112 1113 static void 1114 cfiscsi_maintenance_thread(void *arg) 1115 { 1116 struct cfiscsi_session *cs; 1117 1118 cs = arg; 1119 1120 for (;;) { 1121 CFISCSI_SESSION_LOCK(cs); 1122 if (cs->cs_terminating == false) 1123 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1124 CFISCSI_SESSION_UNLOCK(cs); 1125 1126 if (cs->cs_terminating) { 1127 cfiscsi_session_terminate_tasks(cs); 1128 callout_drain(&cs->cs_callout); 1129 1130 icl_conn_shutdown(cs->cs_conn); 1131 icl_conn_close(cs->cs_conn); 1132 1133 cs->cs_terminating++; 1134 1135 /* 1136 * XXX: We used to wait up to 30 seconds to deliver queued PDUs 1137 * to the initiator. We also tried hard to deliver SCSI Responses 1138 * for the aborted PDUs. We don't do that anymore. We might need 1139 * to revisit that. 1140 */ 1141 1142 cfiscsi_session_delete(cs); 1143 kthread_exit(); 1144 return; 1145 } 1146 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1147 } 1148 } 1149 1150 static void 1151 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1152 { 1153 1154 if (cs->cs_terminating != 0) 1155 return; 1156 cs->cs_terminating = 1; 1157 cv_signal(&cs->cs_maintenance_cv); 1158 #ifdef ICL_KERNEL_PROXY 1159 cv_signal(&cs->cs_login_cv); 1160 #endif 1161 } 1162 1163 static int 1164 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1165 { 1166 int error, i; 1167 struct cfiscsi_softc *softc; 1168 1169 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1170 1171 softc = &cfiscsi_softc; 1172 1173 mtx_lock(&softc->lock); 1174 for (i = 0; i < softc->max_initiators; i++) { 1175 if (softc->ctl_initids[i] == 0) 1176 break; 1177 } 1178 if (i == softc->max_initiators) { 1179 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1180 softc->max_initiators); 1181 mtx_unlock(&softc->lock); 1182 return (1); 1183 } 1184 softc->ctl_initids[i] = 1; 1185 mtx_unlock(&softc->lock); 1186 1187 #if 0 1188 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1189 i, softc->max_initiators); 1190 #endif 1191 cs->cs_ctl_initid = i; 1192 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1193 if (error != 0) { 1194 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1195 mtx_lock(&softc->lock); 1196 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1197 mtx_unlock(&softc->lock); 1198 cs->cs_ctl_initid = -1; 1199 return (1); 1200 } 1201 1202 return (0); 1203 } 1204 1205 static void 1206 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1207 { 1208 int error; 1209 struct cfiscsi_softc *softc; 1210 1211 if (cs->cs_ctl_initid == -1) 1212 return; 1213 1214 softc = &cfiscsi_softc; 1215 1216 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1217 if (error != 0) { 1218 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1219 error); 1220 } 1221 mtx_lock(&softc->lock); 1222 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1223 mtx_unlock(&softc->lock); 1224 cs->cs_ctl_initid = -1; 1225 } 1226 1227 static struct cfiscsi_session * 1228 cfiscsi_session_new(struct cfiscsi_softc *softc) 1229 { 1230 struct cfiscsi_session *cs; 1231 int error; 1232 1233 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1234 if (cs == NULL) { 1235 CFISCSI_WARN("malloc failed"); 1236 return (NULL); 1237 } 1238 cs->cs_ctl_initid = -1; 1239 1240 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1241 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1242 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1243 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1244 #ifdef ICL_KERNEL_PROXY 1245 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1246 #endif 1247 1248 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1249 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1250 cs->cs_conn->ic_error = cfiscsi_error_callback; 1251 cs->cs_conn->ic_prv0 = cs; 1252 1253 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1254 if (error != 0) { 1255 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1256 free(cs, M_CFISCSI); 1257 return (NULL); 1258 } 1259 1260 mtx_lock(&softc->lock); 1261 cs->cs_id = softc->last_session_id + 1; 1262 softc->last_session_id++; 1263 mtx_unlock(&softc->lock); 1264 1265 mtx_lock(&softc->lock); 1266 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1267 mtx_unlock(&softc->lock); 1268 1269 /* 1270 * Start pinging the initiator. 1271 */ 1272 callout_init(&cs->cs_callout, 1); 1273 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1274 1275 return (cs); 1276 } 1277 1278 static void 1279 cfiscsi_session_delete(struct cfiscsi_session *cs) 1280 { 1281 struct cfiscsi_softc *softc; 1282 1283 softc = &cfiscsi_softc; 1284 1285 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1286 ("destroying session with outstanding CTL pdus")); 1287 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1288 ("destroying session with non-empty queue")); 1289 1290 cfiscsi_session_unregister_initiator(cs); 1291 if (cs->cs_target != NULL) 1292 cfiscsi_target_release(cs->cs_target); 1293 icl_conn_close(cs->cs_conn); 1294 icl_conn_free(cs->cs_conn); 1295 1296 mtx_lock(&softc->lock); 1297 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1298 mtx_unlock(&softc->lock); 1299 1300 free(cs, M_CFISCSI); 1301 } 1302 1303 int 1304 cfiscsi_init(void) 1305 { 1306 struct cfiscsi_softc *softc; 1307 struct ctl_frontend *fe; 1308 int retval; 1309 1310 softc = &cfiscsi_softc; 1311 retval = 0; 1312 bzero(softc, sizeof(*softc)); 1313 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1314 1315 #ifdef ICL_KERNEL_PROXY 1316 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1317 #endif 1318 TAILQ_INIT(&softc->sessions); 1319 TAILQ_INIT(&softc->targets); 1320 1321 fe = &softc->fe; 1322 fe->port_type = CTL_PORT_ISCSI; 1323 /* XXX KDM what should the real number be here? */ 1324 fe->num_requested_ctl_io = 4096; 1325 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1326 fe->port_name = softc->port_name; 1327 fe->port_online = cfiscsi_online; 1328 fe->port_offline = cfiscsi_offline; 1329 fe->onoff_arg = softc; 1330 fe->targ_enable = cfiscsi_targ_enable; 1331 fe->targ_disable = cfiscsi_targ_disable; 1332 fe->lun_enable = cfiscsi_lun_enable; 1333 fe->lun_disable = cfiscsi_lun_disable; 1334 fe->targ_lun_arg = softc; 1335 fe->ioctl = cfiscsi_ioctl; 1336 fe->devid = cfiscsi_devid; 1337 fe->fe_datamove = cfiscsi_datamove; 1338 fe->fe_done = cfiscsi_done; 1339 1340 /* XXX KDM what should we report here? */ 1341 /* XXX These should probably be fetched from CTL. */ 1342 fe->max_targets = 1; 1343 fe->max_target_id = 15; 1344 1345 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1346 if (retval != 0) { 1347 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1348 retval); 1349 retval = 1; 1350 goto bailout; 1351 } 1352 1353 softc->max_initiators = fe->max_initiators; 1354 1355 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1356 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1357 UMA_ALIGN_PTR, 0); 1358 1359 return (0); 1360 1361 bailout: 1362 return (retval); 1363 } 1364 1365 static int 1366 cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1367 { 1368 1369 switch (what) { 1370 case MOD_LOAD: 1371 return (cfiscsi_init()); 1372 case MOD_UNLOAD: 1373 return (EBUSY); 1374 default: 1375 return (EOPNOTSUPP); 1376 } 1377 } 1378 1379 #ifdef ICL_KERNEL_PROXY 1380 static void 1381 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1382 { 1383 struct cfiscsi_session *cs; 1384 1385 cs = cfiscsi_session_new(&cfiscsi_softc); 1386 if (cs == NULL) { 1387 CFISCSI_WARN("failed to create session"); 1388 return; 1389 } 1390 1391 icl_conn_handoff_sock(cs->cs_conn, so); 1392 cs->cs_initiator_sa = sa; 1393 cs->cs_portal_id = portal_id; 1394 cs->cs_waiting_for_ctld = true; 1395 cv_signal(&cfiscsi_softc.accept_cv); 1396 } 1397 #endif 1398 1399 static void 1400 cfiscsi_online(void *arg) 1401 { 1402 struct cfiscsi_softc *softc; 1403 1404 softc = (struct cfiscsi_softc *)arg; 1405 1406 softc->online = 1; 1407 #ifdef ICL_KERNEL_PROXY 1408 if (softc->listener != NULL) 1409 icl_listen_free(softc->listener); 1410 softc->listener = icl_listen_new(cfiscsi_accept); 1411 #endif 1412 } 1413 1414 static void 1415 cfiscsi_offline(void *arg) 1416 { 1417 struct cfiscsi_softc *softc; 1418 struct cfiscsi_session *cs; 1419 1420 softc = (struct cfiscsi_softc *)arg; 1421 1422 softc->online = 0; 1423 1424 mtx_lock(&softc->lock); 1425 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1426 cfiscsi_session_terminate(cs); 1427 mtx_unlock(&softc->lock); 1428 1429 #ifdef ICL_KERNEL_PROXY 1430 icl_listen_free(softc->listener); 1431 softc->listener = NULL; 1432 #endif 1433 } 1434 1435 static int 1436 cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1437 { 1438 1439 return (0); 1440 } 1441 1442 static int 1443 cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1444 { 1445 1446 return (0); 1447 } 1448 1449 static void 1450 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1451 { 1452 struct cfiscsi_softc *softc; 1453 struct cfiscsi_session *cs; 1454 struct cfiscsi_target *ct; 1455 struct ctl_iscsi_handoff_params *cihp; 1456 int error; 1457 1458 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1459 softc = &cfiscsi_softc; 1460 1461 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1462 cihp->initiator_name, cihp->initiator_addr, 1463 cihp->target_name); 1464 1465 if (softc->online == 0) { 1466 ci->status = CTL_ISCSI_ERROR; 1467 snprintf(ci->error_str, sizeof(ci->error_str), 1468 "%s: port offline", __func__); 1469 return; 1470 } 1471 1472 ct = cfiscsi_target_find(softc, cihp->target_name); 1473 if (ct == NULL) { 1474 ci->status = CTL_ISCSI_ERROR; 1475 snprintf(ci->error_str, sizeof(ci->error_str), 1476 "%s: target not found", __func__); 1477 return; 1478 } 1479 1480 #ifdef ICL_KERNEL_PROXY 1481 if (cihp->socket > 0 && cihp->connection_id > 0) { 1482 snprintf(ci->error_str, sizeof(ci->error_str), 1483 "both socket and connection_id set"); 1484 ci->status = CTL_ISCSI_ERROR; 1485 cfiscsi_target_release(ct); 1486 return; 1487 } 1488 if (cihp->socket == 0) { 1489 mtx_lock(&cfiscsi_softc.lock); 1490 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1491 if (cs->cs_id == cihp->socket) 1492 break; 1493 } 1494 if (cs == NULL) { 1495 mtx_unlock(&cfiscsi_softc.lock); 1496 snprintf(ci->error_str, sizeof(ci->error_str), 1497 "connection not found"); 1498 ci->status = CTL_ISCSI_ERROR; 1499 cfiscsi_target_release(ct); 1500 return; 1501 } 1502 mtx_unlock(&cfiscsi_softc.lock); 1503 } else { 1504 #endif 1505 cs = cfiscsi_session_new(softc); 1506 if (cs == NULL) { 1507 ci->status = CTL_ISCSI_ERROR; 1508 snprintf(ci->error_str, sizeof(ci->error_str), 1509 "%s: cfiscsi_session_new failed", __func__); 1510 cfiscsi_target_release(ct); 1511 return; 1512 } 1513 #ifdef ICL_KERNEL_PROXY 1514 } 1515 #endif 1516 cs->cs_target = ct; 1517 1518 /* 1519 * First PDU of Full Feature phase has the same CmdSN as the last 1520 * PDU from the Login Phase received from the initiator. Thus, 1521 * the -1 below. 1522 */ 1523 cs->cs_portal_group_tag = cihp->portal_group_tag; 1524 cs->cs_cmdsn = cihp->cmdsn; 1525 cs->cs_statsn = cihp->statsn; 1526 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1527 cs->cs_max_burst_length = cihp->max_burst_length; 1528 cs->cs_immediate_data = !!cihp->immediate_data; 1529 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1530 cs->cs_conn->ic_header_crc32c = true; 1531 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1532 cs->cs_conn->ic_data_crc32c = true; 1533 1534 strlcpy(cs->cs_initiator_name, 1535 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1536 strlcpy(cs->cs_initiator_addr, 1537 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1538 strlcpy(cs->cs_initiator_alias, 1539 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1540 1541 #ifdef ICL_KERNEL_PROXY 1542 if (cihp->socket > 0) { 1543 #endif 1544 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1545 if (error != 0) { 1546 cfiscsi_session_delete(cs); 1547 ci->status = CTL_ISCSI_ERROR; 1548 snprintf(ci->error_str, sizeof(ci->error_str), 1549 "%s: icl_conn_handoff failed with error %d", 1550 __func__, error); 1551 return; 1552 } 1553 #ifdef ICL_KERNEL_PROXY 1554 } 1555 #endif 1556 1557 /* 1558 * Register initiator with CTL. 1559 */ 1560 cfiscsi_session_register_initiator(cs); 1561 1562 #ifdef ICL_KERNEL_PROXY 1563 cs->cs_login_phase = false; 1564 1565 /* 1566 * First PDU of the Full Feature phase has likely already arrived. 1567 * We have to pick it up and execute properly. 1568 */ 1569 if (cs->cs_login_pdu != NULL) { 1570 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1571 cfiscsi_pdu_handle(cs->cs_login_pdu); 1572 cs->cs_login_pdu = NULL; 1573 } 1574 #endif 1575 1576 ci->status = CTL_ISCSI_OK; 1577 } 1578 1579 static void 1580 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1581 { 1582 struct ctl_iscsi_list_params *cilp; 1583 struct cfiscsi_session *cs; 1584 struct cfiscsi_softc *softc; 1585 struct sbuf *sb; 1586 int error; 1587 1588 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1589 softc = &cfiscsi_softc; 1590 1591 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1592 if (sb == NULL) { 1593 ci->status = CTL_ISCSI_ERROR; 1594 snprintf(ci->error_str, sizeof(ci->error_str), 1595 "Unable to allocate %d bytes for iSCSI session list", 1596 cilp->alloc_len); 1597 return; 1598 } 1599 1600 sbuf_printf(sb, "<ctlislist>\n"); 1601 mtx_lock(&softc->lock); 1602 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1603 #ifdef ICL_KERNEL_PROXY 1604 if (cs->cs_target == NULL) 1605 continue; 1606 #endif 1607 error = sbuf_printf(sb, "<connection id=\"%d\">" 1608 "<initiator>%s</initiator>" 1609 "<initiator_addr>%s</initiator_addr>" 1610 "<initiator_alias>%s</initiator_alias>" 1611 "<target>%s</target>" 1612 "<target_alias>%s</target_alias>" 1613 "<header_digest>%s</header_digest>" 1614 "<data_digest>%s</data_digest>" 1615 "<max_data_segment_length>%zd</max_data_segment_length>" 1616 "<immediate_data>%d</immediate_data>" 1617 "<iser>%d</iser>" 1618 "</connection>\n", 1619 cs->cs_id, 1620 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1621 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1622 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1623 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1624 cs->cs_max_data_segment_length, 1625 cs->cs_immediate_data, 1626 cs->cs_conn->ic_iser); 1627 if (error != 0) 1628 break; 1629 } 1630 mtx_unlock(&softc->lock); 1631 error = sbuf_printf(sb, "</ctlislist>\n"); 1632 if (error != 0) { 1633 sbuf_delete(sb); 1634 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1635 snprintf(ci->error_str, sizeof(ci->error_str), 1636 "Out of space, %d bytes is too small", cilp->alloc_len); 1637 return; 1638 } 1639 sbuf_finish(sb); 1640 1641 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1642 cilp->fill_len = sbuf_len(sb) + 1; 1643 ci->status = CTL_ISCSI_OK; 1644 sbuf_delete(sb); 1645 } 1646 1647 static void 1648 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1649 { 1650 struct icl_pdu *response; 1651 struct iscsi_bhs_asynchronous_message *bhsam; 1652 struct ctl_iscsi_terminate_params *citp; 1653 struct cfiscsi_session *cs; 1654 struct cfiscsi_softc *softc; 1655 int found = 0; 1656 1657 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1658 softc = &cfiscsi_softc; 1659 1660 mtx_lock(&softc->lock); 1661 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1662 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1663 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1664 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1665 continue; 1666 1667 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1668 if (response == NULL) { 1669 /* 1670 * Oh well. Just terminate the connection. 1671 */ 1672 } else { 1673 bhsam = (struct iscsi_bhs_asynchronous_message *) 1674 response->ip_bhs; 1675 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1676 bhsam->bhsam_flags = 0x80; 1677 bhsam->bhsam_0xffffffff = 0xffffffff; 1678 bhsam->bhsam_async_event = 1679 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1680 cfiscsi_pdu_queue(response); 1681 } 1682 cfiscsi_session_terminate(cs); 1683 found++; 1684 } 1685 mtx_unlock(&softc->lock); 1686 1687 if (found == 0) { 1688 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1689 snprintf(ci->error_str, sizeof(ci->error_str), 1690 "No matching connections found"); 1691 return; 1692 } 1693 1694 ci->status = CTL_ISCSI_OK; 1695 } 1696 1697 static void 1698 cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1699 { 1700 struct icl_pdu *response; 1701 struct iscsi_bhs_asynchronous_message *bhsam; 1702 struct ctl_iscsi_logout_params *cilp; 1703 struct cfiscsi_session *cs; 1704 struct cfiscsi_softc *softc; 1705 int found = 0; 1706 1707 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1708 softc = &cfiscsi_softc; 1709 1710 mtx_lock(&softc->lock); 1711 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1712 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1713 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1714 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1715 continue; 1716 1717 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1718 if (response == NULL) { 1719 ci->status = CTL_ISCSI_ERROR; 1720 snprintf(ci->error_str, sizeof(ci->error_str), 1721 "Unable to allocate memory"); 1722 mtx_unlock(&softc->lock); 1723 return; 1724 } 1725 bhsam = 1726 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1727 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1728 bhsam->bhsam_flags = 0x80; 1729 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1730 bhsam->bhsam_parameter3 = htons(10); 1731 cfiscsi_pdu_queue(response); 1732 found++; 1733 } 1734 mtx_unlock(&softc->lock); 1735 1736 if (found == 0) { 1737 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1738 snprintf(ci->error_str, sizeof(ci->error_str), 1739 "No matching connections found"); 1740 return; 1741 } 1742 1743 ci->status = CTL_ISCSI_OK; 1744 } 1745 1746 #ifdef ICL_KERNEL_PROXY 1747 static void 1748 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1749 { 1750 struct ctl_iscsi_listen_params *cilp; 1751 struct sockaddr *sa; 1752 int error; 1753 1754 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1755 1756 if (cfiscsi_softc.listener == NULL) { 1757 CFISCSI_DEBUG("no listener"); 1758 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1759 ci->status = CTL_ISCSI_ERROR; 1760 return; 1761 } 1762 1763 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1764 if (error != 0) { 1765 CFISCSI_DEBUG("getsockaddr, error %d", error); 1766 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1767 ci->status = CTL_ISCSI_ERROR; 1768 return; 1769 } 1770 1771 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1772 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1773 if (error != 0) { 1774 free(sa, M_SONAME); 1775 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1776 snprintf(ci->error_str, sizeof(ci->error_str), 1777 "icl_listen_add failed, error %d", error); 1778 ci->status = CTL_ISCSI_ERROR; 1779 return; 1780 } 1781 1782 ci->status = CTL_ISCSI_OK; 1783 } 1784 1785 static void 1786 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1787 { 1788 struct ctl_iscsi_accept_params *ciap; 1789 struct cfiscsi_session *cs; 1790 int error; 1791 1792 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1793 1794 mtx_lock(&cfiscsi_softc.lock); 1795 for (;;) { 1796 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1797 if (cs->cs_waiting_for_ctld) 1798 break; 1799 } 1800 if (cs != NULL) 1801 break; 1802 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1803 if (error != 0) { 1804 mtx_unlock(&cfiscsi_softc.lock); 1805 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1806 ci->status = CTL_ISCSI_ERROR; 1807 return; 1808 } 1809 } 1810 mtx_unlock(&cfiscsi_softc.lock); 1811 1812 cs->cs_waiting_for_ctld = false; 1813 cs->cs_login_phase = true; 1814 1815 ciap->connection_id = cs->cs_id; 1816 ciap->portal_id = cs->cs_portal_id; 1817 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1818 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1819 cs->cs_initiator_sa->sa_len); 1820 if (error != 0) { 1821 snprintf(ci->error_str, sizeof(ci->error_str), 1822 "copyout failed with error %d", error); 1823 ci->status = CTL_ISCSI_ERROR; 1824 return; 1825 } 1826 1827 ci->status = CTL_ISCSI_OK; 1828 } 1829 1830 static void 1831 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1832 { 1833 struct ctl_iscsi_send_params *cisp; 1834 struct cfiscsi_session *cs; 1835 struct icl_pdu *ip; 1836 size_t datalen; 1837 void *data; 1838 int error; 1839 1840 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1841 1842 mtx_lock(&cfiscsi_softc.lock); 1843 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1844 if (cs->cs_id == cisp->connection_id) 1845 break; 1846 } 1847 if (cs == NULL) { 1848 mtx_unlock(&cfiscsi_softc.lock); 1849 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1850 ci->status = CTL_ISCSI_ERROR; 1851 return; 1852 } 1853 mtx_unlock(&cfiscsi_softc.lock); 1854 1855 #if 0 1856 if (cs->cs_login_phase == false) 1857 return (EBUSY); 1858 #endif 1859 1860 if (cs->cs_terminating) { 1861 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1862 ci->status = CTL_ISCSI_ERROR; 1863 return; 1864 } 1865 1866 datalen = cisp->data_segment_len; 1867 /* 1868 * XXX 1869 */ 1870 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1871 if (datalen > 65535) { 1872 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1873 ci->status = CTL_ISCSI_ERROR; 1874 return; 1875 } 1876 if (datalen > 0) { 1877 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1878 error = copyin(cisp->data_segment, data, datalen); 1879 if (error != 0) { 1880 free(data, M_CFISCSI); 1881 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1882 ci->status = CTL_ISCSI_ERROR; 1883 return; 1884 } 1885 } 1886 1887 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1888 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1889 if (datalen > 0) { 1890 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1891 free(data, M_CFISCSI); 1892 } 1893 CFISCSI_SESSION_LOCK(cs); 1894 icl_pdu_queue(ip); 1895 CFISCSI_SESSION_UNLOCK(cs); 1896 ci->status = CTL_ISCSI_OK; 1897 } 1898 1899 static void 1900 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1901 { 1902 struct ctl_iscsi_receive_params *cirp; 1903 struct cfiscsi_session *cs; 1904 struct icl_pdu *ip; 1905 void *data; 1906 int error; 1907 1908 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1909 1910 mtx_lock(&cfiscsi_softc.lock); 1911 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1912 if (cs->cs_id == cirp->connection_id) 1913 break; 1914 } 1915 if (cs == NULL) { 1916 mtx_unlock(&cfiscsi_softc.lock); 1917 snprintf(ci->error_str, sizeof(ci->error_str), 1918 "connection not found"); 1919 ci->status = CTL_ISCSI_ERROR; 1920 return; 1921 } 1922 mtx_unlock(&cfiscsi_softc.lock); 1923 1924 #if 0 1925 if (is->is_login_phase == false) 1926 return (EBUSY); 1927 #endif 1928 1929 CFISCSI_SESSION_LOCK(cs); 1930 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1931 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1932 if (error != 0) { 1933 CFISCSI_SESSION_UNLOCK(cs); 1934 snprintf(ci->error_str, sizeof(ci->error_str), 1935 "interrupted by signal"); 1936 ci->status = CTL_ISCSI_ERROR; 1937 return; 1938 } 1939 } 1940 1941 if (cs->cs_terminating) { 1942 CFISCSI_SESSION_UNLOCK(cs); 1943 snprintf(ci->error_str, sizeof(ci->error_str), 1944 "connection terminating"); 1945 ci->status = CTL_ISCSI_ERROR; 1946 return; 1947 } 1948 ip = cs->cs_login_pdu; 1949 cs->cs_login_pdu = NULL; 1950 CFISCSI_SESSION_UNLOCK(cs); 1951 1952 if (ip->ip_data_len > cirp->data_segment_len) { 1953 icl_pdu_free(ip); 1954 snprintf(ci->error_str, sizeof(ci->error_str), 1955 "data segment too big"); 1956 ci->status = CTL_ISCSI_ERROR; 1957 return; 1958 } 1959 1960 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1961 if (ip->ip_data_len > 0) { 1962 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1963 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1964 copyout(data, cirp->data_segment, ip->ip_data_len); 1965 free(data, M_CFISCSI); 1966 } 1967 1968 icl_pdu_free(ip); 1969 ci->status = CTL_ISCSI_OK; 1970 } 1971 1972 #endif /* !ICL_KERNEL_PROXY */ 1973 1974 static int 1975 cfiscsi_ioctl(struct cdev *dev, 1976 u_long cmd, caddr_t addr, int flag, struct thread *td) 1977 { 1978 struct ctl_iscsi *ci; 1979 1980 if (cmd != CTL_ISCSI) 1981 return (ENOTTY); 1982 1983 ci = (struct ctl_iscsi *)addr; 1984 switch (ci->type) { 1985 case CTL_ISCSI_HANDOFF: 1986 cfiscsi_ioctl_handoff(ci); 1987 break; 1988 case CTL_ISCSI_LIST: 1989 cfiscsi_ioctl_list(ci); 1990 break; 1991 case CTL_ISCSI_TERMINATE: 1992 cfiscsi_ioctl_terminate(ci); 1993 break; 1994 case CTL_ISCSI_LOGOUT: 1995 cfiscsi_ioctl_logout(ci); 1996 break; 1997 #ifdef ICL_KERNEL_PROXY 1998 case CTL_ISCSI_LISTEN: 1999 cfiscsi_ioctl_listen(ci); 2000 break; 2001 case CTL_ISCSI_ACCEPT: 2002 cfiscsi_ioctl_accept(ci); 2003 break; 2004 case CTL_ISCSI_SEND: 2005 cfiscsi_ioctl_send(ci); 2006 break; 2007 case CTL_ISCSI_RECEIVE: 2008 cfiscsi_ioctl_receive(ci); 2009 break; 2010 #else 2011 case CTL_ISCSI_LISTEN: 2012 case CTL_ISCSI_ACCEPT: 2013 case CTL_ISCSI_SEND: 2014 case CTL_ISCSI_RECEIVE: 2015 ci->status = CTL_ISCSI_ERROR; 2016 snprintf(ci->error_str, sizeof(ci->error_str), 2017 "%s: CTL compiled without ICL_KERNEL_PROXY", 2018 __func__); 2019 break; 2020 #endif /* !ICL_KERNEL_PROXY */ 2021 default: 2022 ci->status = CTL_ISCSI_ERROR; 2023 snprintf(ci->error_str, sizeof(ci->error_str), 2024 "%s: invalid iSCSI request type %d", __func__, ci->type); 2025 break; 2026 } 2027 2028 return (0); 2029 } 2030 2031 static int 2032 cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 2033 { 2034 struct cfiscsi_session *cs; 2035 struct scsi_vpd_device_id *devid_ptr; 2036 struct scsi_vpd_id_descriptor *desc, *desc1; 2037 struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */ 2038 struct scsi_vpd_id_t10 *t10id; 2039 struct ctl_lun *lun; 2040 const struct icl_pdu *request; 2041 size_t devid_len, wwpn_len; 2042 2043 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 2044 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2045 cs = PDU_SESSION(request); 2046 2047 wwpn_len = strlen(cs->cs_target->ct_name); 2048 wwpn_len += strlen(",t,0x01"); 2049 wwpn_len += 1; /* '\0' */ 2050 if ((wwpn_len % 4) != 0) 2051 wwpn_len += (4 - (wwpn_len % 4)); 2052 2053 devid_len = sizeof(struct scsi_vpd_device_id) + 2054 sizeof(struct scsi_vpd_id_descriptor) + 2055 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 2056 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 2057 sizeof(struct scsi_vpd_id_descriptor) + 2058 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 2059 sizeof(struct scsi_vpd_id_descriptor) + 2060 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 2061 2062 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 2063 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 2064 ctsio->kern_sg_entries = 0; 2065 2066 if (devid_len < alloc_len) { 2067 ctsio->residual = alloc_len - devid_len; 2068 ctsio->kern_data_len = devid_len; 2069 ctsio->kern_total_len = devid_len; 2070 } else { 2071 ctsio->residual = 0; 2072 ctsio->kern_data_len = alloc_len; 2073 ctsio->kern_total_len = alloc_len; 2074 } 2075 ctsio->kern_data_resid = 0; 2076 ctsio->kern_rel_offset = 0; 2077 ctsio->kern_sg_entries = 0; 2078 2079 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2080 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2081 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2082 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 2083 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2084 wwpn_len); 2085 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2086 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2087 2088 if (lun != NULL) 2089 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2090 lun->be_lun->lun_type; 2091 else 2092 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2093 2094 devid_ptr->page_code = SVPD_DEVICE_ID; 2095 2096 scsi_ulto2b(devid_len - 4, devid_ptr->length); 2097 2098 /* 2099 * We're using a LUN association here. i.e., this device ID is a 2100 * per-LUN identifier. 2101 */ 2102 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2103 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2104 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 2105 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2106 2107 /* 2108 * If we've actually got a backend, copy the device id from the 2109 * per-LUN data. Otherwise, set it to all spaces. 2110 */ 2111 if (lun != NULL) { 2112 /* 2113 * Copy the backend's LUN ID. 2114 */ 2115 strncpy((char *)t10id->vendor_spec_id, 2116 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2117 } else { 2118 /* 2119 * No backend, set this to spaces. 2120 */ 2121 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2122 } 2123 2124 /* 2125 * desc1 is for the WWPN which is a port asscociation. 2126 */ 2127 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2128 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2129 SVPD_ID_TYPE_SCSI_NAME; 2130 desc1->length = wwpn_len; 2131 snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x", 2132 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2133 2134 /* 2135 * desc2 is for the Relative Target Port(type 4h) identifier 2136 */ 2137 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2138 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2139 SVPD_ID_TYPE_RELTARG; 2140 desc2->length = 4; 2141 desc2->identifier[3] = 1; 2142 2143 /* 2144 * desc3 is for the Target Port Group(type 5h) identifier 2145 */ 2146 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2147 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2148 SVPD_ID_TYPE_TPORTGRP; 2149 desc3->length = 4; 2150 desc3->identifier[3] = 1; 2151 2152 ctsio->scsi_status = SCSI_STATUS_OK; 2153 2154 ctsio->be_move_done = ctl_config_move_done; 2155 ctl_datamove((union ctl_io *)ctsio); 2156 2157 return (CTL_RETVAL_COMPLETE); 2158 } 2159 2160 static void 2161 cfiscsi_target_hold(struct cfiscsi_target *ct) 2162 { 2163 2164 refcount_acquire(&ct->ct_refcount); 2165 } 2166 2167 static void 2168 cfiscsi_target_release(struct cfiscsi_target *ct) 2169 { 2170 struct cfiscsi_softc *softc; 2171 2172 softc = ct->ct_softc; 2173 mtx_lock(&softc->lock); 2174 if (refcount_release(&ct->ct_refcount)) { 2175 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2176 mtx_unlock(&softc->lock); 2177 free(ct, M_CFISCSI); 2178 2179 return; 2180 } 2181 mtx_unlock(&softc->lock); 2182 } 2183 2184 static struct cfiscsi_target * 2185 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2186 { 2187 struct cfiscsi_target *ct; 2188 2189 mtx_lock(&softc->lock); 2190 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2191 if (strcmp(name, ct->ct_name) != 0) 2192 continue; 2193 cfiscsi_target_hold(ct); 2194 mtx_unlock(&softc->lock); 2195 return (ct); 2196 } 2197 mtx_unlock(&softc->lock); 2198 2199 return (NULL); 2200 } 2201 2202 static struct cfiscsi_target * 2203 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2204 const char *alias) 2205 { 2206 struct cfiscsi_target *ct, *newct; 2207 int i; 2208 2209 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2210 return (NULL); 2211 2212 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2213 2214 mtx_lock(&softc->lock); 2215 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2216 if (strcmp(name, ct->ct_name) != 0) 2217 continue; 2218 cfiscsi_target_hold(ct); 2219 mtx_unlock(&softc->lock); 2220 free(newct, M_CFISCSI); 2221 return (ct); 2222 } 2223 2224 for (i = 0; i < CTL_MAX_LUNS; i++) 2225 newct->ct_luns[i] = -1; 2226 2227 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2228 if (alias != NULL) 2229 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2230 refcount_init(&newct->ct_refcount, 1); 2231 newct->ct_softc = softc; 2232 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2233 mtx_unlock(&softc->lock); 2234 2235 return (newct); 2236 } 2237 2238 /* 2239 * Takes LUN from the target space and returns LUN from the CTL space. 2240 */ 2241 static uint32_t 2242 cfiscsi_map_lun(void *arg, uint32_t lun) 2243 { 2244 struct cfiscsi_session *cs; 2245 2246 cs = arg; 2247 2248 if (lun >= CTL_MAX_LUNS) { 2249 CFISCSI_DEBUG("requested lun number %d is higher " 2250 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2251 return (0xffffffff); 2252 } 2253 2254 if (cs->cs_target->ct_luns[lun] < 0) 2255 return (0xffffffff); 2256 2257 return (cs->cs_target->ct_luns[lun]); 2258 } 2259 2260 static int 2261 cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2262 unsigned long lun_id, unsigned long ctl_lun_id) 2263 { 2264 2265 if (lun_id >= CTL_MAX_LUNS) { 2266 CFISCSI_WARN("requested lun number %ld is higher " 2267 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2268 return (-1); 2269 } 2270 2271 if (ct->ct_luns[lun_id] >= 0) { 2272 /* 2273 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2274 * when the LUN is created, and a second time just before 2275 * the port is brought online; don't emit warnings 2276 * for that case. 2277 */ 2278 if (ct->ct_luns[lun_id] == ctl_lun_id) 2279 return (0); 2280 CFISCSI_WARN("lun %ld already allocated", lun_id); 2281 return (-1); 2282 } 2283 2284 #if 0 2285 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2286 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2287 #endif 2288 2289 ct->ct_luns[lun_id] = ctl_lun_id; 2290 cfiscsi_target_hold(ct); 2291 2292 return (0); 2293 } 2294 2295 static int 2296 cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2297 { 2298 2299 if (ct->ct_luns[lun_id] < 0) { 2300 CFISCSI_WARN("lun %ld not allocated", lun_id); 2301 return (-1); 2302 } 2303 2304 ct->ct_luns[lun_id] = -1; 2305 cfiscsi_target_release(ct); 2306 2307 return (0); 2308 } 2309 2310 static int 2311 cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2312 { 2313 struct cfiscsi_softc *softc; 2314 struct cfiscsi_target *ct; 2315 struct ctl_be_lun_option *opt; 2316 const char *target = NULL, *target_alias = NULL; 2317 const char *lun = NULL; 2318 unsigned long tmp; 2319 2320 softc = (struct cfiscsi_softc *)arg; 2321 2322 STAILQ_FOREACH(opt, 2323 &control_softc->ctl_luns[lun_id]->be_lun->options, links) { 2324 if (strcmp(opt->name, "cfiscsi_target") == 0) 2325 target = opt->value; 2326 else if (strcmp(opt->name, "cfiscsi_target_alias") == 0) 2327 target_alias = opt->value; 2328 else if (strcmp(opt->name, "cfiscsi_lun") == 0) 2329 lun = opt->value; 2330 } 2331 2332 if (target == NULL && lun == NULL) 2333 return (0); 2334 2335 if (target == NULL || lun == NULL) { 2336 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2337 "cfiscsi_lun, or the other way around; ignoring"); 2338 return (0); 2339 } 2340 2341 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2342 if (ct == NULL) { 2343 CFISCSI_WARN("failed to create target \"%s\"", target); 2344 return (0); 2345 } 2346 2347 tmp = strtoul(lun, NULL, 10); 2348 cfiscsi_target_set_lun(ct, tmp, lun_id); 2349 cfiscsi_target_release(ct); 2350 return (0); 2351 } 2352 2353 static int 2354 cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2355 { 2356 struct cfiscsi_softc *softc; 2357 struct cfiscsi_target *ct; 2358 int i; 2359 2360 softc = (struct cfiscsi_softc *)arg; 2361 2362 mtx_lock(&softc->lock); 2363 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2364 for (i = 0; i < CTL_MAX_LUNS; i++) { 2365 if (ct->ct_luns[i] < 0) 2366 continue; 2367 if (ct->ct_luns[i] != lun_id) 2368 continue; 2369 mtx_unlock(&softc->lock); 2370 cfiscsi_target_unset_lun(ct, i); 2371 return (0); 2372 } 2373 } 2374 mtx_unlock(&softc->lock); 2375 return (0); 2376 } 2377 2378 static void 2379 cfiscsi_datamove_in(union ctl_io *io) 2380 { 2381 struct cfiscsi_session *cs; 2382 struct icl_pdu *request, *response; 2383 const struct iscsi_bhs_scsi_command *bhssc; 2384 struct iscsi_bhs_data_in *bhsdi; 2385 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2386 size_t len, expected_len, sg_len, buffer_offset; 2387 const char *sg_addr; 2388 int ctl_sg_count, error, i; 2389 2390 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2391 cs = PDU_SESSION(request); 2392 2393 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2394 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2395 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2396 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2397 2398 if (io->scsiio.kern_sg_entries > 0) { 2399 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2400 ctl_sg_count = io->scsiio.kern_sg_entries; 2401 } else { 2402 ctl_sglist = &ctl_sg_entry; 2403 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2404 ctl_sglist->len = io->scsiio.kern_data_len; 2405 ctl_sg_count = 1; 2406 } 2407 2408 /* 2409 * This is the total amount of data to be transferred within the current 2410 * SCSI command. We need to record it so that we can properly report 2411 * underflow/underflow. 2412 */ 2413 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2414 2415 /* 2416 * This is the offset within the current SCSI command; for the first 2417 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2418 * it will be the sum of lengths of previous ones. 2419 */ 2420 buffer_offset = io->scsiio.kern_rel_offset; 2421 2422 /* 2423 * This is the transfer length expected by the initiator. In theory, 2424 * it could be different from the correct amount of data from the SCSI 2425 * point of view, even if that doesn't make any sense. 2426 */ 2427 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2428 #if 0 2429 if (expected_len != io->scsiio.kern_total_len) { 2430 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2431 "actual length %zd", expected_len, 2432 (size_t)io->scsiio.kern_total_len); 2433 } 2434 #endif 2435 2436 if (buffer_offset >= expected_len) { 2437 #if 0 2438 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2439 "already sent the expected len", buffer_offset); 2440 #endif 2441 io->scsiio.be_move_done(io); 2442 return; 2443 } 2444 2445 i = 0; 2446 sg_addr = NULL; 2447 sg_len = 0; 2448 response = NULL; 2449 bhsdi = NULL; 2450 for (;;) { 2451 if (response == NULL) { 2452 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2453 if (response == NULL) { 2454 CFISCSI_SESSION_WARN(cs, "failed to " 2455 "allocate memory; dropping connection"); 2456 ctl_set_busy(&io->scsiio); 2457 io->scsiio.be_move_done(io); 2458 cfiscsi_session_terminate(cs); 2459 return; 2460 } 2461 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2462 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2463 bhsdi->bhsdi_initiator_task_tag = 2464 bhssc->bhssc_initiator_task_tag; 2465 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2466 PDU_EXPDATASN(request)++; 2467 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2468 } 2469 2470 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2471 if (sg_len == 0) { 2472 sg_addr = ctl_sglist[i].addr; 2473 sg_len = ctl_sglist[i].len; 2474 KASSERT(sg_len > 0, ("sg_len <= 0")); 2475 } 2476 2477 len = sg_len; 2478 2479 /* 2480 * Truncate to maximum data segment length. 2481 */ 2482 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2483 ("ip_data_len %zd >= max_data_segment_length %zd", 2484 response->ip_data_len, cs->cs_max_data_segment_length)); 2485 if (response->ip_data_len + len > 2486 cs->cs_max_data_segment_length) { 2487 len = cs->cs_max_data_segment_length - 2488 response->ip_data_len; 2489 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2490 len, sg_len)); 2491 } 2492 2493 /* 2494 * Truncate to expected data transfer length. 2495 */ 2496 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2497 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2498 buffer_offset, response->ip_data_len, expected_len)); 2499 if (buffer_offset + response->ip_data_len + len > expected_len) { 2500 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2501 "to expected data transfer length %zd", 2502 buffer_offset + response->ip_data_len + len, expected_len); 2503 len = expected_len - (buffer_offset + response->ip_data_len); 2504 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2505 len, sg_len)); 2506 } 2507 2508 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2509 if (error != 0) { 2510 CFISCSI_SESSION_WARN(cs, "failed to " 2511 "allocate memory; dropping connection"); 2512 icl_pdu_free(response); 2513 ctl_set_busy(&io->scsiio); 2514 io->scsiio.be_move_done(io); 2515 cfiscsi_session_terminate(cs); 2516 return; 2517 } 2518 sg_addr += len; 2519 sg_len -= len; 2520 2521 KASSERT(buffer_offset + request->ip_data_len <= expected_len, 2522 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2523 buffer_offset, request->ip_data_len, expected_len)); 2524 if (buffer_offset + request->ip_data_len == expected_len) { 2525 /* 2526 * Already have the amount of data the initiator wanted. 2527 */ 2528 break; 2529 } 2530 2531 if (sg_len == 0) { 2532 /* 2533 * End of scatter-gather segment; 2534 * proceed to the next one... 2535 */ 2536 if (i == ctl_sg_count - 1) { 2537 /* 2538 * ... unless this was the last one. 2539 */ 2540 break; 2541 } 2542 i++; 2543 } 2544 2545 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2546 /* 2547 * Can't stuff more data into the current PDU; 2548 * queue it. Note that's not enough to check 2549 * for kern_data_resid == 0 instead; there 2550 * may be several Data-In PDUs for the final 2551 * call to cfiscsi_datamove(), and we want 2552 * to set the F flag only on the last of them. 2553 */ 2554 buffer_offset += response->ip_data_len; 2555 if (buffer_offset == io->scsiio.kern_total_len || 2556 buffer_offset == expected_len) 2557 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2558 cfiscsi_pdu_queue(response); 2559 response = NULL; 2560 bhsdi = NULL; 2561 } 2562 } 2563 if (response != NULL) { 2564 buffer_offset += response->ip_data_len; 2565 if (buffer_offset == io->scsiio.kern_total_len || 2566 buffer_offset == expected_len) 2567 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2568 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2569 cfiscsi_pdu_queue(response); 2570 } 2571 2572 io->scsiio.be_move_done(io); 2573 } 2574 2575 static void 2576 cfiscsi_datamove_out(union ctl_io *io) 2577 { 2578 struct cfiscsi_session *cs; 2579 struct icl_pdu *request, *response; 2580 const struct iscsi_bhs_scsi_command *bhssc; 2581 struct iscsi_bhs_r2t *bhsr2t; 2582 struct cfiscsi_data_wait *cdw; 2583 uint32_t target_transfer_tag; 2584 bool done; 2585 2586 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2587 cs = PDU_SESSION(request); 2588 2589 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2590 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2591 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2592 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2593 2594 /* 2595 * We need to record it so that we can properly report 2596 * underflow/underflow. 2597 */ 2598 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2599 2600 /* 2601 * We hadn't received anything during this datamove yet. 2602 */ 2603 io->scsiio.ext_data_filled = 0; 2604 2605 target_transfer_tag = 2606 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2607 2608 #if 0 2609 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2610 "task tag 0x%x, target transfer tag 0x%x", 2611 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2612 #endif 2613 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2614 if (cdw == NULL) { 2615 CFISCSI_SESSION_WARN(cs, "failed to " 2616 "allocate memory; dropping connection"); 2617 ctl_set_busy(&io->scsiio); 2618 io->scsiio.be_move_done(io); 2619 cfiscsi_session_terminate(cs); 2620 return; 2621 } 2622 cdw->cdw_ctl_io = io; 2623 cdw->cdw_target_transfer_tag = target_transfer_tag; 2624 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2625 2626 if (cs->cs_immediate_data && io->scsiio.kern_rel_offset == 0 && 2627 icl_pdu_data_segment_length(request) > 0) { 2628 done = cfiscsi_handle_data_segment(request, cdw); 2629 if (done) { 2630 uma_zfree(cfiscsi_data_wait_zone, cdw); 2631 io->scsiio.be_move_done(io); 2632 return; 2633 } 2634 } 2635 2636 CFISCSI_SESSION_LOCK(cs); 2637 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2638 CFISCSI_SESSION_UNLOCK(cs); 2639 2640 /* 2641 * XXX: We should limit the number of outstanding R2T PDUs 2642 * per task to MaxOutstandingR2T. 2643 */ 2644 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2645 if (response == NULL) { 2646 CFISCSI_SESSION_WARN(cs, "failed to " 2647 "allocate memory; dropping connection"); 2648 ctl_set_busy(&io->scsiio); 2649 io->scsiio.be_move_done(io); 2650 cfiscsi_session_terminate(cs); 2651 return; 2652 } 2653 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2654 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2655 bhsr2t->bhsr2t_flags = 0x80; 2656 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2657 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2658 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2659 /* 2660 * XXX: Here we assume that cfiscsi_datamove() won't ever 2661 * be running concurrently on several CPUs for a given 2662 * command. 2663 */ 2664 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2665 PDU_R2TSN(request)++; 2666 /* 2667 * This is the offset within the current SCSI command; 2668 * i.e. for the first call of datamove(), it will be 0, 2669 * and for subsequent ones it will be the sum of lengths 2670 * of previous ones. 2671 * 2672 * The ext_data_filled is to account for unsolicited 2673 * (immediate) data that might have already arrived. 2674 */ 2675 bhsr2t->bhsr2t_buffer_offset = 2676 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2677 /* 2678 * This is the total length (sum of S/G lengths) this call 2679 * to cfiscsi_datamove() is supposed to handle. 2680 * 2681 * XXX: Limit it to MaxBurstLength. 2682 */ 2683 bhsr2t->bhsr2t_desired_data_transfer_length = 2684 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2685 cfiscsi_pdu_queue(response); 2686 } 2687 2688 static void 2689 cfiscsi_datamove(union ctl_io *io) 2690 { 2691 2692 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2693 cfiscsi_datamove_in(io); 2694 else 2695 cfiscsi_datamove_out(io); 2696 } 2697 2698 static void 2699 cfiscsi_scsi_command_done(union ctl_io *io) 2700 { 2701 struct icl_pdu *request, *response; 2702 struct iscsi_bhs_scsi_command *bhssc; 2703 struct iscsi_bhs_scsi_response *bhssr; 2704 #ifdef DIAGNOSTIC 2705 struct cfiscsi_data_wait *cdw; 2706 #endif 2707 struct cfiscsi_session *cs; 2708 uint16_t sense_length; 2709 2710 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2711 cs = PDU_SESSION(request); 2712 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2713 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2714 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2715 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2716 2717 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2718 // bhssc->bhssc_initiator_task_tag); 2719 2720 #ifdef DIAGNOSTIC 2721 CFISCSI_SESSION_LOCK(cs); 2722 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2723 KASSERT(bhssc->bhssc_initiator_task_tag != 2724 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2725 CFISCSI_SESSION_UNLOCK(cs); 2726 #endif 2727 2728 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2729 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2730 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2731 bhssr->bhssr_flags = 0x80; 2732 /* 2733 * XXX: We don't deal with bidirectional under/overflows; 2734 * does anything actually support those? 2735 */ 2736 if (PDU_TOTAL_TRANSFER_LEN(request) < 2737 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2738 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2739 bhssr->bhssr_residual_count = 2740 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2741 PDU_TOTAL_TRANSFER_LEN(request)); 2742 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2743 // ntohl(bhssr->bhssr_residual_count)); 2744 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2745 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2746 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2747 bhssr->bhssr_residual_count = 2748 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2749 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2750 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2751 // ntohl(bhssr->bhssr_residual_count)); 2752 } 2753 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2754 bhssr->bhssr_status = io->scsiio.scsi_status; 2755 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2756 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2757 2758 if (io->scsiio.sense_len > 0) { 2759 #if 0 2760 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2761 io->scsiio.sense_len); 2762 #endif 2763 sense_length = htons(io->scsiio.sense_len); 2764 icl_pdu_append_data(response, 2765 &sense_length, sizeof(sense_length), M_WAITOK); 2766 icl_pdu_append_data(response, 2767 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2768 } 2769 2770 ctl_free_io(io); 2771 icl_pdu_free(request); 2772 cfiscsi_pdu_queue(response); 2773 } 2774 2775 static void 2776 cfiscsi_task_management_done(union ctl_io *io) 2777 { 2778 struct icl_pdu *request, *response; 2779 struct iscsi_bhs_task_management_request *bhstmr; 2780 struct iscsi_bhs_task_management_response *bhstmr2; 2781 struct cfiscsi_data_wait *cdw, *tmpcdw; 2782 struct cfiscsi_session *cs; 2783 2784 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2785 cs = PDU_SESSION(request); 2786 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2787 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2788 ISCSI_BHS_OPCODE_TASK_REQUEST, 2789 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2790 2791 #if 0 2792 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2793 bhstmr->bhstmr_initiator_task_tag, 2794 bhstmr->bhstmr_referenced_task_tag); 2795 #endif 2796 2797 if ((bhstmr->bhstmr_function & ~0x80) == 2798 BHSTMR_FUNCTION_ABORT_TASK) { 2799 /* 2800 * Make sure we no longer wait for Data-Out for this command. 2801 */ 2802 CFISCSI_SESSION_LOCK(cs); 2803 TAILQ_FOREACH_SAFE(cdw, 2804 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2805 if (bhstmr->bhstmr_referenced_task_tag != 2806 cdw->cdw_initiator_task_tag) 2807 continue; 2808 2809 #if 0 2810 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2811 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2812 #endif 2813 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2814 cdw, cdw_next); 2815 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2816 uma_zfree(cfiscsi_data_wait_zone, cdw); 2817 } 2818 CFISCSI_SESSION_UNLOCK(cs); 2819 } 2820 2821 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2822 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2823 response->ip_bhs; 2824 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2825 bhstmr2->bhstmr_flags = 0x80; 2826 if (io->io_hdr.status == CTL_SUCCESS) { 2827 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2828 } else { 2829 /* 2830 * XXX: How to figure out what exactly went wrong? iSCSI spec 2831 * expects us to provide detailed error, e.g. "Task does 2832 * not exist" or "LUN does not exist". 2833 */ 2834 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2835 bhstmr2->bhstmr_response = 2836 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2837 } 2838 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2839 2840 ctl_free_io(io); 2841 icl_pdu_free(request); 2842 cfiscsi_pdu_queue(response); 2843 } 2844 2845 static void 2846 cfiscsi_done(union ctl_io *io) 2847 { 2848 struct icl_pdu *request; 2849 struct cfiscsi_session *cs; 2850 2851 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2852 ("invalid CTL status %#x", io->io_hdr.status)); 2853 2854 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2855 if (request == NULL) { 2856 /* 2857 * Implicit task termination has just completed; nothing to do. 2858 */ 2859 return; 2860 } 2861 2862 cs = PDU_SESSION(request); 2863 refcount_release(&cs->cs_outstanding_ctl_pdus); 2864 2865 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2866 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2867 cfiscsi_scsi_command_done(io); 2868 break; 2869 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2870 cfiscsi_task_management_done(io); 2871 break; 2872 default: 2873 panic("cfiscsi_done called with wrong opcode 0x%x", 2874 request->ip_bhs->bhs_opcode); 2875 } 2876 } 2877