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/endian.h> 43 #include <sys/file.h> 44 #include <sys/kernel.h> 45 #include <sys/kthread.h> 46 #include <sys/lock.h> 47 #include <sys/malloc.h> 48 #include <sys/module.h> 49 #include <sys/mutex.h> 50 #include <sys/queue.h> 51 #include <sys/sbuf.h> 52 #include <sys/sysctl.h> 53 #include <sys/systm.h> 54 #include <sys/uio.h> 55 #include <sys/unistd.h> 56 #include <vm/uma.h> 57 58 #include <cam/scsi/scsi_all.h> 59 #include <cam/scsi/scsi_da.h> 60 #include <cam/ctl/ctl_io.h> 61 #include <cam/ctl/ctl.h> 62 #include <cam/ctl/ctl_backend.h> 63 #include <cam/ctl/ctl_error.h> 64 #include <cam/ctl/ctl_frontend.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/icl_wrappers.h> 72 #include <dev/iscsi/iscsi_proto.h> 73 #include <cam/ctl/ctl_frontend_iscsi.h> 74 75 #ifdef ICL_KERNEL_PROXY 76 #include <sys/socketvar.h> 77 #endif 78 79 #ifdef ICL_KERNEL_PROXY 80 FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 81 #endif 82 83 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 84 static uma_zone_t cfiscsi_data_wait_zone; 85 86 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 87 "CAM Target Layer iSCSI Frontend"); 88 static int debug = 1; 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 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 93 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 94 static int login_timeout = 60; 95 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 96 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 97 static int maxcmdsn_delta = 256; 98 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 99 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 100 "without confirmation"); 101 102 #define CFISCSI_DEBUG(X, ...) \ 103 do { \ 104 if (debug > 1) { \ 105 printf("%s: " X "\n", \ 106 __func__, ## __VA_ARGS__); \ 107 } \ 108 } while (0) 109 110 #define CFISCSI_WARN(X, ...) \ 111 do { \ 112 if (debug > 0) { \ 113 printf("WARNING: %s: " X "\n", \ 114 __func__, ## __VA_ARGS__); \ 115 } \ 116 } while (0) 117 118 #define CFISCSI_SESSION_DEBUG(S, X, ...) \ 119 do { \ 120 if (debug > 1) { \ 121 printf("%s: %s (%s): " X "\n", \ 122 __func__, S->cs_initiator_addr, \ 123 S->cs_initiator_name, ## __VA_ARGS__); \ 124 } \ 125 } while (0) 126 127 #define CFISCSI_SESSION_WARN(S, X, ...) \ 128 do { \ 129 if (debug > 0) { \ 130 printf("WARNING: %s (%s): " X "\n", \ 131 S->cs_initiator_addr, \ 132 S->cs_initiator_name, ## __VA_ARGS__); \ 133 } \ 134 } while (0) 135 136 #define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 137 #define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 138 #define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 139 140 #define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 141 #define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 142 #define PDU_EXPDATASN(X) (X)->ip_prv0 143 #define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 144 #define PDU_R2TSN(X) (X)->ip_prv2 145 146 int cfiscsi_init(void); 147 static void cfiscsi_online(void *arg); 148 static void cfiscsi_offline(void *arg); 149 static int cfiscsi_info(void *arg, struct sbuf *sb); 150 static int cfiscsi_ioctl(struct cdev *dev, 151 u_long cmd, caddr_t addr, int flag, struct thread *td); 152 static void cfiscsi_datamove(union ctl_io *io); 153 static void cfiscsi_datamove_in(union ctl_io *io); 154 static void cfiscsi_datamove_out(union ctl_io *io); 155 static void cfiscsi_done(union ctl_io *io); 156 static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 157 static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 158 static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 159 static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 160 static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 161 static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 162 static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 163 static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 164 struct cfiscsi_session *cs, union ctl_io *io, 165 uint32_t initiator_task_tag, 166 uint32_t *target_transfer_tagp); 167 static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 168 struct cfiscsi_data_wait *cdw); 169 static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 170 *softc, const char *name, uint16_t tag); 171 static struct cfiscsi_target *cfiscsi_target_find_or_create( 172 struct cfiscsi_softc *softc, const char *name, const char *alias, 173 uint16_t tag); 174 static void cfiscsi_target_release(struct cfiscsi_target *ct); 175 static void cfiscsi_session_delete(struct cfiscsi_session *cs); 176 177 static struct cfiscsi_softc cfiscsi_softc; 178 179 static struct ctl_frontend cfiscsi_frontend = 180 { 181 .name = "iscsi", 182 .init = cfiscsi_init, 183 .ioctl = cfiscsi_ioctl, 184 }; 185 CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 186 MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 187 188 static struct icl_pdu * 189 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 190 { 191 192 return (icl_pdu_new(request->ip_conn, flags)); 193 } 194 195 static bool 196 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 197 { 198 const struct iscsi_bhs_scsi_command *bhssc; 199 struct cfiscsi_session *cs; 200 uint32_t cmdsn, expstatsn; 201 202 cs = PDU_SESSION(request); 203 204 /* 205 * Every incoming PDU - not just NOP-Out - resets the ping timer. 206 * The purpose of the timeout is to reset the connection when it stalls; 207 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 208 * in some queue. 209 * 210 * XXX: Locking? 211 */ 212 cs->cs_timeout = 0; 213 214 /* 215 * Data-Out PDUs don't contain CmdSN. 216 */ 217 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 218 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 219 return (false); 220 221 /* 222 * We're only using fields common for all the request 223 * (initiator -> target) PDUs. 224 */ 225 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 226 cmdsn = ntohl(bhssc->bhssc_cmdsn); 227 expstatsn = ntohl(bhssc->bhssc_expstatsn); 228 229 CFISCSI_SESSION_LOCK(cs); 230 #if 0 231 if (expstatsn != cs->cs_statsn) { 232 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 233 "while current StatSN is %d", expstatsn, 234 cs->cs_statsn); 235 } 236 #endif 237 238 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 239 /* 240 * The target MUST silently ignore any non-immediate command 241 * outside of this range. 242 */ 243 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 244 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 245 CFISCSI_SESSION_UNLOCK(cs); 246 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 247 "while expected %u", cmdsn, cs->cs_cmdsn); 248 return (true); 249 } 250 251 /* 252 * We don't support multiple connections now, so any 253 * discontinuity in CmdSN means lost PDUs. Since we don't 254 * support PDU retransmission -- terminate the connection. 255 */ 256 if (cmdsn != cs->cs_cmdsn) { 257 CFISCSI_SESSION_UNLOCK(cs); 258 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 259 "while expected %u; dropping connection", 260 cmdsn, cs->cs_cmdsn); 261 cfiscsi_session_terminate(cs); 262 return (true); 263 } 264 cs->cs_cmdsn++; 265 } 266 267 CFISCSI_SESSION_UNLOCK(cs); 268 269 return (false); 270 } 271 272 static void 273 cfiscsi_pdu_handle(struct icl_pdu *request) 274 { 275 struct cfiscsi_session *cs; 276 bool ignore; 277 278 cs = PDU_SESSION(request); 279 280 ignore = cfiscsi_pdu_update_cmdsn(request); 281 if (ignore) { 282 icl_pdu_free(request); 283 return; 284 } 285 286 /* 287 * Handle the PDU; this includes e.g. receiving the remaining 288 * part of PDU and submitting the SCSI command to CTL 289 * or queueing a reply. The handling routine is responsible 290 * for freeing the PDU when it's no longer needed. 291 */ 292 switch (request->ip_bhs->bhs_opcode & 293 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 294 case ISCSI_BHS_OPCODE_NOP_OUT: 295 cfiscsi_pdu_handle_nop_out(request); 296 break; 297 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 298 cfiscsi_pdu_handle_scsi_command(request); 299 break; 300 case ISCSI_BHS_OPCODE_TASK_REQUEST: 301 cfiscsi_pdu_handle_task_request(request); 302 break; 303 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 304 cfiscsi_pdu_handle_data_out(request); 305 break; 306 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 307 cfiscsi_pdu_handle_logout_request(request); 308 break; 309 default: 310 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 311 "opcode 0x%x; dropping connection", 312 request->ip_bhs->bhs_opcode); 313 icl_pdu_free(request); 314 cfiscsi_session_terminate(cs); 315 } 316 317 } 318 319 static void 320 cfiscsi_receive_callback(struct icl_pdu *request) 321 { 322 struct cfiscsi_session *cs; 323 324 cs = PDU_SESSION(request); 325 326 #ifdef ICL_KERNEL_PROXY 327 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 328 if (cs->cs_login_pdu == NULL) 329 cs->cs_login_pdu = request; 330 else 331 icl_pdu_free(request); 332 cv_signal(&cs->cs_login_cv); 333 return; 334 } 335 #endif 336 337 cfiscsi_pdu_handle(request); 338 } 339 340 static void 341 cfiscsi_error_callback(struct icl_conn *ic) 342 { 343 struct cfiscsi_session *cs; 344 345 cs = CONN_SESSION(ic); 346 347 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 348 cfiscsi_session_terminate(cs); 349 } 350 351 static int 352 cfiscsi_pdu_prepare(struct icl_pdu *response) 353 { 354 struct cfiscsi_session *cs; 355 struct iscsi_bhs_scsi_response *bhssr; 356 bool advance_statsn = true; 357 358 cs = PDU_SESSION(response); 359 360 CFISCSI_SESSION_LOCK_ASSERT(cs); 361 362 /* 363 * We're only using fields common for all the response 364 * (target -> initiator) PDUs. 365 */ 366 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 367 368 /* 369 * 10.8.3: "The StatSN for this connection is not advanced 370 * after this PDU is sent." 371 */ 372 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 373 advance_statsn = false; 374 375 /* 376 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 377 * StatSN for the connection is not advanced after this PDU is sent." 378 */ 379 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 380 bhssr->bhssr_initiator_task_tag == 0xffffffff) 381 advance_statsn = false; 382 383 /* 384 * See the comment below - StatSN is not meaningful and must 385 * not be advanced. 386 */ 387 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 388 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 389 advance_statsn = false; 390 391 /* 392 * 10.7.3: "The fields StatSN, Status, and Residual Count 393 * only have meaningful content if the S bit is set to 1." 394 */ 395 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 396 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 397 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 398 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 399 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 400 401 if (advance_statsn) 402 cs->cs_statsn++; 403 404 return (0); 405 } 406 407 static void 408 cfiscsi_pdu_queue(struct icl_pdu *response) 409 { 410 struct cfiscsi_session *cs; 411 412 cs = PDU_SESSION(response); 413 414 CFISCSI_SESSION_LOCK(cs); 415 cfiscsi_pdu_prepare(response); 416 icl_pdu_queue(response); 417 CFISCSI_SESSION_UNLOCK(cs); 418 } 419 420 static void 421 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 422 { 423 struct cfiscsi_session *cs; 424 struct iscsi_bhs_nop_out *bhsno; 425 struct iscsi_bhs_nop_in *bhsni; 426 struct icl_pdu *response; 427 void *data = NULL; 428 size_t datasize; 429 int error; 430 431 cs = PDU_SESSION(request); 432 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 433 434 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 435 /* 436 * Nothing to do, iscsi_pdu_update_statsn() already 437 * zeroed the timeout. 438 */ 439 icl_pdu_free(request); 440 return; 441 } 442 443 datasize = icl_pdu_data_segment_length(request); 444 if (datasize > 0) { 445 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 446 if (data == NULL) { 447 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 448 "dropping connection"); 449 icl_pdu_free(request); 450 cfiscsi_session_terminate(cs); 451 return; 452 } 453 icl_pdu_get_data(request, 0, data, datasize); 454 } 455 456 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 457 if (response == NULL) { 458 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 459 "droppping connection"); 460 free(data, M_CFISCSI); 461 icl_pdu_free(request); 462 cfiscsi_session_terminate(cs); 463 return; 464 } 465 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 466 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 467 bhsni->bhsni_flags = 0x80; 468 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 469 bhsni->bhsni_target_transfer_tag = 0xffffffff; 470 if (datasize > 0) { 471 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 472 if (error != 0) { 473 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 474 "dropping connection"); 475 free(data, M_CFISCSI); 476 icl_pdu_free(request); 477 icl_pdu_free(response); 478 cfiscsi_session_terminate(cs); 479 return; 480 } 481 free(data, M_CFISCSI); 482 } 483 484 icl_pdu_free(request); 485 cfiscsi_pdu_queue(response); 486 } 487 488 static void 489 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 490 { 491 struct iscsi_bhs_scsi_command *bhssc; 492 struct cfiscsi_session *cs; 493 union ctl_io *io; 494 int error; 495 496 cs = PDU_SESSION(request); 497 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 498 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 499 // bhssc->bhssc_initiator_task_tag); 500 501 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 502 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 503 "ImmediateData=No; dropping connection"); 504 icl_pdu_free(request); 505 cfiscsi_session_terminate(cs); 506 return; 507 } 508 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 509 ctl_zero_io(io); 510 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 511 io->io_hdr.io_type = CTL_IO_SCSI; 512 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 513 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 514 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 515 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 516 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 517 case BHSSC_FLAGS_ATTR_UNTAGGED: 518 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 519 break; 520 case BHSSC_FLAGS_ATTR_SIMPLE: 521 io->scsiio.tag_type = CTL_TAG_SIMPLE; 522 break; 523 case BHSSC_FLAGS_ATTR_ORDERED: 524 io->scsiio.tag_type = CTL_TAG_ORDERED; 525 break; 526 case BHSSC_FLAGS_ATTR_HOQ: 527 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 528 break; 529 case BHSSC_FLAGS_ATTR_ACA: 530 io->scsiio.tag_type = CTL_TAG_ACA; 531 break; 532 default: 533 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 534 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 535 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 536 break; 537 } 538 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 539 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 540 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 541 error = ctl_queue(io); 542 if (error != CTL_RETVAL_COMPLETE) { 543 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 544 "dropping connection", error); 545 ctl_free_io(io); 546 refcount_release(&cs->cs_outstanding_ctl_pdus); 547 icl_pdu_free(request); 548 cfiscsi_session_terminate(cs); 549 } 550 } 551 552 static void 553 cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 554 { 555 struct iscsi_bhs_task_management_request *bhstmr; 556 struct iscsi_bhs_task_management_response *bhstmr2; 557 struct icl_pdu *response; 558 struct cfiscsi_session *cs; 559 union ctl_io *io; 560 int error; 561 562 cs = PDU_SESSION(request); 563 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 564 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 565 ctl_zero_io(io); 566 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 567 io->io_hdr.io_type = CTL_IO_TASK; 568 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 569 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 570 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 571 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 572 573 switch (bhstmr->bhstmr_function & ~0x80) { 574 case BHSTMR_FUNCTION_ABORT_TASK: 575 #if 0 576 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 577 #endif 578 io->taskio.task_action = CTL_TASK_ABORT_TASK; 579 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 580 break; 581 case BHSTMR_FUNCTION_ABORT_TASK_SET: 582 #if 0 583 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 584 #endif 585 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 586 break; 587 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 588 #if 0 589 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 590 #endif 591 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 592 break; 593 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 594 #if 0 595 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 596 #endif 597 io->taskio.task_action = CTL_TASK_LUN_RESET; 598 break; 599 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 600 #if 0 601 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 602 #endif 603 io->taskio.task_action = CTL_TASK_TARGET_RESET; 604 break; 605 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 606 #if 0 607 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 608 #endif 609 io->taskio.task_action = CTL_TASK_TARGET_RESET; 610 break; 611 case BHSTMR_FUNCTION_QUERY_TASK: 612 #if 0 613 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 614 #endif 615 io->taskio.task_action = CTL_TASK_QUERY_TASK; 616 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 617 break; 618 case BHSTMR_FUNCTION_QUERY_TASK_SET: 619 #if 0 620 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 621 #endif 622 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 623 break; 624 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 625 #if 0 626 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 627 #endif 628 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 629 break; 630 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 631 #if 0 632 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 633 #endif 634 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 635 break; 636 default: 637 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 638 bhstmr->bhstmr_function & ~0x80); 639 ctl_free_io(io); 640 641 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 642 if (response == NULL) { 643 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 644 "dropping connection"); 645 icl_pdu_free(request); 646 cfiscsi_session_terminate(cs); 647 return; 648 } 649 bhstmr2 = (struct iscsi_bhs_task_management_response *) 650 response->ip_bhs; 651 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 652 bhstmr2->bhstmr_flags = 0x80; 653 bhstmr2->bhstmr_response = 654 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 655 bhstmr2->bhstmr_initiator_task_tag = 656 bhstmr->bhstmr_initiator_task_tag; 657 icl_pdu_free(request); 658 cfiscsi_pdu_queue(response); 659 return; 660 } 661 662 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 663 error = ctl_queue(io); 664 if (error != CTL_RETVAL_COMPLETE) { 665 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 666 "dropping connection", error); 667 ctl_free_io(io); 668 refcount_release(&cs->cs_outstanding_ctl_pdus); 669 icl_pdu_free(request); 670 cfiscsi_session_terminate(cs); 671 } 672 } 673 674 static bool 675 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 676 { 677 struct iscsi_bhs_data_out *bhsdo; 678 struct cfiscsi_session *cs; 679 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 680 size_t copy_len, len, off, buffer_offset; 681 int ctl_sg_count; 682 union ctl_io *io; 683 684 cs = PDU_SESSION(request); 685 686 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 687 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 688 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 689 ISCSI_BHS_OPCODE_SCSI_COMMAND, 690 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 691 692 /* 693 * We're only using fields common for Data-Out and SCSI Command PDUs. 694 */ 695 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 696 697 io = cdw->cdw_ctl_io; 698 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 699 ("CTL_FLAG_DATA_IN")); 700 701 #if 0 702 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 703 request->ip_data_len, io->scsiio.kern_total_len); 704 #endif 705 706 if (io->scsiio.kern_sg_entries > 0) { 707 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 708 ctl_sg_count = io->scsiio.kern_sg_entries; 709 } else { 710 ctl_sglist = &ctl_sg_entry; 711 ctl_sglist->addr = io->scsiio.kern_data_ptr; 712 ctl_sglist->len = io->scsiio.kern_data_len; 713 ctl_sg_count = 1; 714 } 715 716 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 717 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 718 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 719 else 720 buffer_offset = 0; 721 len = icl_pdu_data_segment_length(request); 722 723 /* 724 * Make sure the offset, as sent by the initiator, matches the offset 725 * we're supposed to be at in the scatter-gather list. 726 */ 727 if (buffer_offset > 728 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 729 buffer_offset + len <= 730 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 731 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 732 "expected %zd; dropping connection", buffer_offset, 733 (size_t)io->scsiio.kern_rel_offset + 734 (size_t)io->scsiio.ext_data_filled); 735 ctl_set_data_phase_error(&io->scsiio); 736 cfiscsi_session_terminate(cs); 737 return (true); 738 } 739 740 /* 741 * This is the offset within the PDU data segment, as opposed 742 * to buffer_offset, which is the offset within the task (SCSI 743 * command). 744 */ 745 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 746 buffer_offset; 747 748 /* 749 * Iterate over the scatter/gather segments, filling them with data 750 * from the PDU data segment. Note that this can get called multiple 751 * times for one SCSI command; the cdw structure holds state for the 752 * scatter/gather list. 753 */ 754 for (;;) { 755 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 756 ("cdw->cdw_sg_index >= ctl_sg_count")); 757 if (cdw->cdw_sg_len == 0) { 758 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 759 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 760 } 761 KASSERT(off <= len, ("len > off")); 762 copy_len = len - off; 763 if (copy_len > cdw->cdw_sg_len) 764 copy_len = cdw->cdw_sg_len; 765 766 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 767 cdw->cdw_sg_addr += copy_len; 768 cdw->cdw_sg_len -= copy_len; 769 off += copy_len; 770 io->scsiio.ext_data_filled += copy_len; 771 772 if (cdw->cdw_sg_len == 0) { 773 /* 774 * End of current segment. 775 */ 776 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 777 /* 778 * Last segment in scatter/gather list. 779 */ 780 break; 781 } 782 cdw->cdw_sg_index++; 783 } 784 785 if (off == len) { 786 /* 787 * End of PDU payload. 788 */ 789 break; 790 } 791 } 792 793 if (len > off) { 794 /* 795 * In case of unsolicited data, it's possible that the buffer 796 * provided by CTL is smaller than negotiated FirstBurstLength. 797 * Just ignore the superfluous data; will ask for them with R2T 798 * on next call to cfiscsi_datamove(). 799 * 800 * This obviously can only happen with SCSI Command PDU. 801 */ 802 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 803 ISCSI_BHS_OPCODE_SCSI_COMMAND) 804 return (true); 805 806 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 807 "expected %zd; dropping connection", 808 icl_pdu_data_segment_length(request), off); 809 ctl_set_data_phase_error(&io->scsiio); 810 cfiscsi_session_terminate(cs); 811 return (true); 812 } 813 814 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 815 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 816 CFISCSI_SESSION_WARN(cs, "got the final packet without " 817 "the F flag; flags = 0x%x; dropping connection", 818 bhsdo->bhsdo_flags); 819 ctl_set_data_phase_error(&io->scsiio); 820 cfiscsi_session_terminate(cs); 821 return (true); 822 } 823 824 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 825 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 826 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 827 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 828 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 829 "transmitted size was %zd bytes instead of %d; " 830 "dropping connection", 831 (size_t)io->scsiio.ext_data_filled, 832 cdw->cdw_r2t_end); 833 ctl_set_data_phase_error(&io->scsiio); 834 cfiscsi_session_terminate(cs); 835 return (true); 836 } else { 837 /* 838 * For SCSI Command PDU, this just means we need to 839 * solicit more data by sending R2T. 840 */ 841 return (false); 842 } 843 } 844 845 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 846 #if 0 847 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 848 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 849 #endif 850 851 return (true); 852 } 853 854 return (false); 855 } 856 857 static void 858 cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 859 { 860 struct iscsi_bhs_data_out *bhsdo; 861 struct cfiscsi_session *cs; 862 struct cfiscsi_data_wait *cdw = NULL; 863 union ctl_io *io; 864 bool done; 865 866 cs = PDU_SESSION(request); 867 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 868 869 CFISCSI_SESSION_LOCK(cs); 870 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 871 #if 0 872 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 873 "ttt 0x%x, itt 0x%x", 874 bhsdo->bhsdo_target_transfer_tag, 875 bhsdo->bhsdo_initiator_task_tag, 876 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 877 #endif 878 if (bhsdo->bhsdo_target_transfer_tag == 879 cdw->cdw_target_transfer_tag) 880 break; 881 } 882 CFISCSI_SESSION_UNLOCK(cs); 883 if (cdw == NULL) { 884 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 885 "0x%x, not found; dropping connection", 886 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 887 icl_pdu_free(request); 888 cfiscsi_session_terminate(cs); 889 return; 890 } 891 892 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 893 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 894 "DataSN %u, while expected %u; dropping connection", 895 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 896 icl_pdu_free(request); 897 cfiscsi_session_terminate(cs); 898 return; 899 } 900 cdw->cdw_datasn++; 901 902 io = cdw->cdw_ctl_io; 903 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 904 ("CTL_FLAG_DATA_IN")); 905 906 done = cfiscsi_handle_data_segment(request, cdw); 907 if (done) { 908 CFISCSI_SESSION_LOCK(cs); 909 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 910 CFISCSI_SESSION_UNLOCK(cs); 911 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 912 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 913 cfiscsi_data_wait_free(cs, cdw); 914 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 915 if (done) 916 io->scsiio.be_move_done(io); 917 else 918 cfiscsi_datamove_out(io); 919 } 920 921 icl_pdu_free(request); 922 } 923 924 static void 925 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 926 { 927 struct iscsi_bhs_logout_request *bhslr; 928 struct iscsi_bhs_logout_response *bhslr2; 929 struct icl_pdu *response; 930 struct cfiscsi_session *cs; 931 932 cs = PDU_SESSION(request); 933 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 934 switch (bhslr->bhslr_reason & 0x7f) { 935 case BHSLR_REASON_CLOSE_SESSION: 936 case BHSLR_REASON_CLOSE_CONNECTION: 937 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 938 if (response == NULL) { 939 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 940 icl_pdu_free(request); 941 cfiscsi_session_terminate(cs); 942 return; 943 } 944 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 945 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 946 bhslr2->bhslr_flags = 0x80; 947 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 948 bhslr2->bhslr_initiator_task_tag = 949 bhslr->bhslr_initiator_task_tag; 950 icl_pdu_free(request); 951 cfiscsi_pdu_queue(response); 952 cfiscsi_session_terminate(cs); 953 break; 954 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 955 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 956 if (response == NULL) { 957 CFISCSI_SESSION_WARN(cs, 958 "failed to allocate memory; dropping connection"); 959 icl_pdu_free(request); 960 cfiscsi_session_terminate(cs); 961 return; 962 } 963 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 964 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 965 bhslr2->bhslr_flags = 0x80; 966 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 967 bhslr2->bhslr_initiator_task_tag = 968 bhslr->bhslr_initiator_task_tag; 969 icl_pdu_free(request); 970 cfiscsi_pdu_queue(response); 971 break; 972 default: 973 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 974 bhslr->bhslr_reason); 975 icl_pdu_free(request); 976 cfiscsi_session_terminate(cs); 977 break; 978 } 979 } 980 981 static void 982 cfiscsi_callout(void *context) 983 { 984 struct icl_pdu *cp; 985 struct iscsi_bhs_nop_in *bhsni; 986 struct cfiscsi_session *cs; 987 988 cs = context; 989 990 if (cs->cs_terminating) 991 return; 992 993 callout_schedule(&cs->cs_callout, 1 * hz); 994 995 atomic_add_int(&cs->cs_timeout, 1); 996 997 #ifdef ICL_KERNEL_PROXY 998 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 999 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1000 CFISCSI_SESSION_WARN(cs, "login timed out after " 1001 "%d seconds; dropping connection", cs->cs_timeout); 1002 cfiscsi_session_terminate(cs); 1003 } 1004 return; 1005 } 1006 #endif 1007 1008 if (ping_timeout <= 0) { 1009 /* 1010 * Pings are disabled. Don't send NOP-In in this case; 1011 * user might have disabled pings to work around problems 1012 * with certain initiators that can't properly handle 1013 * NOP-In, such as iPXE. Reset the timeout, to avoid 1014 * triggering reconnection, should the user decide to 1015 * reenable them. 1016 */ 1017 cs->cs_timeout = 0; 1018 return; 1019 } 1020 1021 if (cs->cs_timeout >= ping_timeout) { 1022 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1023 "dropping connection", ping_timeout); 1024 cfiscsi_session_terminate(cs); 1025 return; 1026 } 1027 1028 /* 1029 * If the ping was reset less than one second ago - which means 1030 * that we've received some PDU during the last second - assume 1031 * the traffic flows correctly and don't bother sending a NOP-Out. 1032 * 1033 * (It's 2 - one for one second, and one for incrementing is_timeout 1034 * earlier in this routine.) 1035 */ 1036 if (cs->cs_timeout < 2) 1037 return; 1038 1039 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1040 if (cp == NULL) { 1041 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1042 return; 1043 } 1044 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1045 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1046 bhsni->bhsni_flags = 0x80; 1047 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1048 1049 cfiscsi_pdu_queue(cp); 1050 } 1051 1052 static struct cfiscsi_data_wait * 1053 cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1054 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1055 { 1056 struct cfiscsi_data_wait *cdw; 1057 int error; 1058 1059 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1060 if (cdw == NULL) { 1061 CFISCSI_SESSION_WARN(cs, 1062 "failed to allocate %zd bytes", sizeof(*cdw)); 1063 return (NULL); 1064 } 1065 1066 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1067 &cdw->cdw_icl_prv); 1068 if (error != 0) { 1069 CFISCSI_SESSION_WARN(cs, 1070 "icl_conn_transfer_setup() failed with error %d", error); 1071 uma_zfree(cfiscsi_data_wait_zone, cdw); 1072 return (NULL); 1073 } 1074 1075 cdw->cdw_ctl_io = io; 1076 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1077 cdw->cdw_initiator_task_tag = initiator_task_tag; 1078 1079 return (cdw); 1080 } 1081 1082 static void 1083 cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1084 struct cfiscsi_data_wait *cdw) 1085 { 1086 1087 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1088 uma_zfree(cfiscsi_data_wait_zone, cdw); 1089 } 1090 1091 static void 1092 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1093 { 1094 struct cfiscsi_data_wait *cdw; 1095 union ctl_io *io; 1096 int error, last, wait; 1097 1098 if (cs->cs_target == NULL) 1099 return; /* No target yet, so nothing to do. */ 1100 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1101 ctl_zero_io(io); 1102 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1103 io->io_hdr.io_type = CTL_IO_TASK; 1104 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1105 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1106 io->io_hdr.nexus.targ_lun = 0; 1107 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1108 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1109 wait = cs->cs_outstanding_ctl_pdus; 1110 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1111 error = ctl_queue(io); 1112 if (error != CTL_RETVAL_COMPLETE) { 1113 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1114 refcount_release(&cs->cs_outstanding_ctl_pdus); 1115 ctl_free_io(io); 1116 } 1117 1118 CFISCSI_SESSION_LOCK(cs); 1119 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1120 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1121 CFISCSI_SESSION_UNLOCK(cs); 1122 /* 1123 * Set nonzero port status; this prevents backends from 1124 * assuming that the data transfer actually succeeded 1125 * and writing uninitialized data to disk. 1126 */ 1127 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1128 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1129 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1130 cfiscsi_data_wait_free(cs, cdw); 1131 CFISCSI_SESSION_LOCK(cs); 1132 } 1133 CFISCSI_SESSION_UNLOCK(cs); 1134 1135 /* 1136 * Wait for CTL to terminate all the tasks. 1137 */ 1138 if (wait > 0) 1139 CFISCSI_SESSION_WARN(cs, 1140 "waiting for CTL to terminate %d tasks", wait); 1141 for (;;) { 1142 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1143 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1144 if (last != 0) 1145 break; 1146 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1147 0, "cfiscsi_terminate", hz / 100); 1148 } 1149 if (wait > 0) 1150 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1151 } 1152 1153 static void 1154 cfiscsi_maintenance_thread(void *arg) 1155 { 1156 struct cfiscsi_session *cs; 1157 1158 cs = arg; 1159 1160 for (;;) { 1161 CFISCSI_SESSION_LOCK(cs); 1162 if (cs->cs_terminating == false) 1163 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1164 CFISCSI_SESSION_UNLOCK(cs); 1165 1166 if (cs->cs_terminating) { 1167 1168 /* 1169 * We used to wait up to 30 seconds to deliver queued 1170 * PDUs to the initiator. We also tried hard to deliver 1171 * SCSI Responses for the aborted PDUs. We don't do 1172 * that anymore. We might need to revisit that. 1173 */ 1174 callout_drain(&cs->cs_callout); 1175 icl_conn_close(cs->cs_conn); 1176 1177 /* 1178 * At this point ICL receive thread is no longer 1179 * running; no new tasks can be queued. 1180 */ 1181 cfiscsi_session_terminate_tasks(cs); 1182 cfiscsi_session_delete(cs); 1183 kthread_exit(); 1184 return; 1185 } 1186 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1187 } 1188 } 1189 1190 static void 1191 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1192 { 1193 1194 if (cs->cs_terminating) 1195 return; 1196 cs->cs_terminating = true; 1197 cv_signal(&cs->cs_maintenance_cv); 1198 #ifdef ICL_KERNEL_PROXY 1199 cv_signal(&cs->cs_login_cv); 1200 #endif 1201 } 1202 1203 static int 1204 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1205 { 1206 struct cfiscsi_target *ct; 1207 char *name; 1208 int i; 1209 1210 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1211 1212 ct = cs->cs_target; 1213 name = strdup(cs->cs_initiator_id, M_CTL); 1214 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1215 if (i < 0) { 1216 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1217 i); 1218 cs->cs_ctl_initid = -1; 1219 return (1); 1220 } 1221 cs->cs_ctl_initid = i; 1222 #if 0 1223 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1224 #endif 1225 1226 return (0); 1227 } 1228 1229 static void 1230 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1231 { 1232 int error; 1233 1234 if (cs->cs_ctl_initid == -1) 1235 return; 1236 1237 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1238 if (error != 0) { 1239 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1240 error); 1241 } 1242 cs->cs_ctl_initid = -1; 1243 } 1244 1245 static struct cfiscsi_session * 1246 cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1247 { 1248 struct cfiscsi_session *cs; 1249 int error; 1250 1251 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1252 if (cs == NULL) { 1253 CFISCSI_WARN("malloc failed"); 1254 return (NULL); 1255 } 1256 cs->cs_ctl_initid = -1; 1257 1258 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1259 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1260 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1261 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1262 #ifdef ICL_KERNEL_PROXY 1263 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1264 #endif 1265 1266 cs->cs_conn = icl_new_conn(offload, "cfiscsi", &cs->cs_lock); 1267 if (cs->cs_conn == NULL) { 1268 free(cs, M_CFISCSI); 1269 return (NULL); 1270 } 1271 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1272 cs->cs_conn->ic_error = cfiscsi_error_callback; 1273 cs->cs_conn->ic_prv0 = cs; 1274 1275 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1276 if (error != 0) { 1277 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1278 free(cs, M_CFISCSI); 1279 return (NULL); 1280 } 1281 1282 mtx_lock(&softc->lock); 1283 cs->cs_id = ++softc->last_session_id; 1284 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1285 mtx_unlock(&softc->lock); 1286 1287 /* 1288 * Start pinging the initiator. 1289 */ 1290 callout_init(&cs->cs_callout, 1); 1291 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1292 1293 return (cs); 1294 } 1295 1296 static void 1297 cfiscsi_session_delete(struct cfiscsi_session *cs) 1298 { 1299 struct cfiscsi_softc *softc; 1300 1301 softc = &cfiscsi_softc; 1302 1303 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1304 ("destroying session with outstanding CTL pdus")); 1305 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1306 ("destroying session with non-empty queue")); 1307 1308 cfiscsi_session_unregister_initiator(cs); 1309 if (cs->cs_target != NULL) 1310 cfiscsi_target_release(cs->cs_target); 1311 icl_conn_close(cs->cs_conn); 1312 icl_conn_free(cs->cs_conn); 1313 1314 mtx_lock(&softc->lock); 1315 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1316 cv_signal(&softc->sessions_cv); 1317 mtx_unlock(&softc->lock); 1318 1319 free(cs, M_CFISCSI); 1320 } 1321 1322 int 1323 cfiscsi_init(void) 1324 { 1325 struct cfiscsi_softc *softc; 1326 1327 softc = &cfiscsi_softc; 1328 bzero(softc, sizeof(*softc)); 1329 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1330 1331 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1332 #ifdef ICL_KERNEL_PROXY 1333 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1334 #endif 1335 TAILQ_INIT(&softc->sessions); 1336 TAILQ_INIT(&softc->targets); 1337 1338 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1339 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1340 UMA_ALIGN_PTR, 0); 1341 1342 return (0); 1343 } 1344 1345 #ifdef ICL_KERNEL_PROXY 1346 static void 1347 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1348 { 1349 struct cfiscsi_session *cs; 1350 1351 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1352 if (cs == NULL) { 1353 CFISCSI_WARN("failed to create session"); 1354 return; 1355 } 1356 1357 icl_conn_handoff_sock(cs->cs_conn, so); 1358 cs->cs_initiator_sa = sa; 1359 cs->cs_portal_id = portal_id; 1360 cs->cs_waiting_for_ctld = true; 1361 cv_signal(&cfiscsi_softc.accept_cv); 1362 } 1363 #endif 1364 1365 static void 1366 cfiscsi_online(void *arg) 1367 { 1368 struct cfiscsi_softc *softc; 1369 struct cfiscsi_target *ct; 1370 int online; 1371 1372 ct = (struct cfiscsi_target *)arg; 1373 softc = ct->ct_softc; 1374 1375 mtx_lock(&softc->lock); 1376 if (ct->ct_online) { 1377 mtx_unlock(&softc->lock); 1378 return; 1379 } 1380 ct->ct_online = 1; 1381 online = softc->online++; 1382 mtx_unlock(&softc->lock); 1383 if (online > 0) 1384 return; 1385 1386 #ifdef ICL_KERNEL_PROXY 1387 if (softc->listener != NULL) 1388 icl_listen_free(softc->listener); 1389 softc->listener = icl_listen_new(cfiscsi_accept); 1390 #endif 1391 } 1392 1393 static void 1394 cfiscsi_offline(void *arg) 1395 { 1396 struct cfiscsi_softc *softc; 1397 struct cfiscsi_target *ct; 1398 struct cfiscsi_session *cs; 1399 int online; 1400 1401 ct = (struct cfiscsi_target *)arg; 1402 softc = ct->ct_softc; 1403 1404 mtx_lock(&softc->lock); 1405 if (!ct->ct_online) { 1406 mtx_unlock(&softc->lock); 1407 return; 1408 } 1409 ct->ct_online = 0; 1410 online = --softc->online; 1411 1412 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1413 if (cs->cs_target == ct) 1414 cfiscsi_session_terminate(cs); 1415 } 1416 do { 1417 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1418 if (cs->cs_target == ct) 1419 break; 1420 } 1421 if (cs != NULL) 1422 cv_wait(&softc->sessions_cv, &softc->lock); 1423 } while (cs != NULL && ct->ct_online == 0); 1424 mtx_unlock(&softc->lock); 1425 if (online > 0) 1426 return; 1427 1428 #ifdef ICL_KERNEL_PROXY 1429 icl_listen_free(softc->listener); 1430 softc->listener = NULL; 1431 #endif 1432 } 1433 1434 static int 1435 cfiscsi_info(void *arg, struct sbuf *sb) 1436 { 1437 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1438 int retval; 1439 1440 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1441 ct->ct_state); 1442 return (retval); 1443 } 1444 1445 static void 1446 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1447 { 1448 struct cfiscsi_softc *softc; 1449 struct cfiscsi_session *cs, *cs2; 1450 struct cfiscsi_target *ct; 1451 struct ctl_iscsi_handoff_params *cihp; 1452 int error; 1453 1454 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1455 softc = &cfiscsi_softc; 1456 1457 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1458 cihp->initiator_name, cihp->initiator_addr, 1459 cihp->target_name); 1460 1461 ct = cfiscsi_target_find(softc, cihp->target_name, 1462 cihp->portal_group_tag); 1463 if (ct == NULL) { 1464 ci->status = CTL_ISCSI_ERROR; 1465 snprintf(ci->error_str, sizeof(ci->error_str), 1466 "%s: target not found", __func__); 1467 return; 1468 } 1469 1470 #ifdef ICL_KERNEL_PROXY 1471 if (cihp->socket > 0 && cihp->connection_id > 0) { 1472 snprintf(ci->error_str, sizeof(ci->error_str), 1473 "both socket and connection_id set"); 1474 ci->status = CTL_ISCSI_ERROR; 1475 cfiscsi_target_release(ct); 1476 return; 1477 } 1478 if (cihp->socket == 0) { 1479 mtx_lock(&cfiscsi_softc.lock); 1480 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1481 if (cs->cs_id == cihp->connection_id) 1482 break; 1483 } 1484 if (cs == NULL) { 1485 mtx_unlock(&cfiscsi_softc.lock); 1486 snprintf(ci->error_str, sizeof(ci->error_str), 1487 "connection not found"); 1488 ci->status = CTL_ISCSI_ERROR; 1489 cfiscsi_target_release(ct); 1490 return; 1491 } 1492 mtx_unlock(&cfiscsi_softc.lock); 1493 } else { 1494 #endif 1495 cs = cfiscsi_session_new(softc, cihp->offload); 1496 if (cs == NULL) { 1497 ci->status = CTL_ISCSI_ERROR; 1498 snprintf(ci->error_str, sizeof(ci->error_str), 1499 "%s: cfiscsi_session_new failed", __func__); 1500 cfiscsi_target_release(ct); 1501 return; 1502 } 1503 #ifdef ICL_KERNEL_PROXY 1504 } 1505 #endif 1506 1507 /* 1508 * First PDU of Full Feature phase has the same CmdSN as the last 1509 * PDU from the Login Phase received from the initiator. Thus, 1510 * the -1 below. 1511 */ 1512 cs->cs_cmdsn = cihp->cmdsn; 1513 cs->cs_statsn = cihp->statsn; 1514 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1515 cs->cs_max_burst_length = cihp->max_burst_length; 1516 cs->cs_immediate_data = !!cihp->immediate_data; 1517 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1518 cs->cs_conn->ic_header_crc32c = true; 1519 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1520 cs->cs_conn->ic_data_crc32c = true; 1521 1522 strlcpy(cs->cs_initiator_name, 1523 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1524 strlcpy(cs->cs_initiator_addr, 1525 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1526 strlcpy(cs->cs_initiator_alias, 1527 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1528 memcpy(cs->cs_initiator_isid, 1529 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1530 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1531 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1532 cihp->initiator_isid[0], cihp->initiator_isid[1], 1533 cihp->initiator_isid[2], cihp->initiator_isid[3], 1534 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1535 1536 mtx_lock(&softc->lock); 1537 if (ct->ct_online == 0) { 1538 mtx_unlock(&softc->lock); 1539 cfiscsi_session_terminate(cs); 1540 cfiscsi_target_release(ct); 1541 ci->status = CTL_ISCSI_ERROR; 1542 snprintf(ci->error_str, sizeof(ci->error_str), 1543 "%s: port offline", __func__); 1544 return; 1545 } 1546 cs->cs_target = ct; 1547 mtx_unlock(&softc->lock); 1548 1549 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1550 restart: 1551 if (!cs->cs_terminating) { 1552 mtx_lock(&softc->lock); 1553 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1554 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1555 cs->cs_target == cs2->cs_target && 1556 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1557 if (strcmp(cs->cs_initiator_addr, 1558 cs2->cs_initiator_addr) != 0) { 1559 CFISCSI_SESSION_WARN(cs2, 1560 "session reinstatement from " 1561 "different address %s", 1562 cs->cs_initiator_addr); 1563 } else { 1564 CFISCSI_SESSION_DEBUG(cs2, 1565 "session reinstatement"); 1566 } 1567 cfiscsi_session_terminate(cs2); 1568 mtx_unlock(&softc->lock); 1569 pause("cfiscsi_reinstate", 1); 1570 goto restart; 1571 } 1572 } 1573 mtx_unlock(&softc->lock); 1574 } 1575 1576 /* 1577 * Register initiator with CTL. 1578 */ 1579 cfiscsi_session_register_initiator(cs); 1580 1581 #ifdef ICL_KERNEL_PROXY 1582 if (cihp->socket > 0) { 1583 #endif 1584 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1585 if (error != 0) { 1586 cfiscsi_session_terminate(cs); 1587 refcount_release(&cs->cs_outstanding_ctl_pdus); 1588 ci->status = CTL_ISCSI_ERROR; 1589 snprintf(ci->error_str, sizeof(ci->error_str), 1590 "%s: icl_conn_handoff failed with error %d", 1591 __func__, error); 1592 return; 1593 } 1594 #ifdef ICL_KERNEL_PROXY 1595 } 1596 #endif 1597 1598 #ifdef ICL_KERNEL_PROXY 1599 cs->cs_login_phase = false; 1600 1601 /* 1602 * First PDU of the Full Feature phase has likely already arrived. 1603 * We have to pick it up and execute properly. 1604 */ 1605 if (cs->cs_login_pdu != NULL) { 1606 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1607 cfiscsi_pdu_handle(cs->cs_login_pdu); 1608 cs->cs_login_pdu = NULL; 1609 } 1610 #endif 1611 1612 refcount_release(&cs->cs_outstanding_ctl_pdus); 1613 ci->status = CTL_ISCSI_OK; 1614 } 1615 1616 static void 1617 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1618 { 1619 struct ctl_iscsi_list_params *cilp; 1620 struct cfiscsi_session *cs; 1621 struct cfiscsi_softc *softc; 1622 struct sbuf *sb; 1623 int error; 1624 1625 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1626 softc = &cfiscsi_softc; 1627 1628 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1629 if (sb == NULL) { 1630 ci->status = CTL_ISCSI_ERROR; 1631 snprintf(ci->error_str, sizeof(ci->error_str), 1632 "Unable to allocate %d bytes for iSCSI session list", 1633 cilp->alloc_len); 1634 return; 1635 } 1636 1637 sbuf_printf(sb, "<ctlislist>\n"); 1638 mtx_lock(&softc->lock); 1639 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1640 #ifdef ICL_KERNEL_PROXY 1641 if (cs->cs_target == NULL) 1642 continue; 1643 #endif 1644 error = sbuf_printf(sb, "<connection id=\"%d\">" 1645 "<initiator>%s</initiator>" 1646 "<initiator_addr>%s</initiator_addr>" 1647 "<initiator_alias>%s</initiator_alias>" 1648 "<target>%s</target>" 1649 "<target_alias>%s</target_alias>" 1650 "<target_portal_group_tag>%u</target_portal_group_tag>" 1651 "<header_digest>%s</header_digest>" 1652 "<data_digest>%s</data_digest>" 1653 "<max_data_segment_length>%zd</max_data_segment_length>" 1654 "<immediate_data>%d</immediate_data>" 1655 "<iser>%d</iser>" 1656 "<offload>%s</offload>" 1657 "</connection>\n", 1658 cs->cs_id, 1659 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1660 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1661 cs->cs_target->ct_tag, 1662 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1663 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1664 cs->cs_max_data_segment_length, 1665 cs->cs_immediate_data, 1666 cs->cs_conn->ic_iser, 1667 cs->cs_conn->ic_offload); 1668 if (error != 0) 1669 break; 1670 } 1671 mtx_unlock(&softc->lock); 1672 error = sbuf_printf(sb, "</ctlislist>\n"); 1673 if (error != 0) { 1674 sbuf_delete(sb); 1675 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1676 snprintf(ci->error_str, sizeof(ci->error_str), 1677 "Out of space, %d bytes is too small", cilp->alloc_len); 1678 return; 1679 } 1680 sbuf_finish(sb); 1681 1682 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1683 cilp->fill_len = sbuf_len(sb) + 1; 1684 ci->status = CTL_ISCSI_OK; 1685 sbuf_delete(sb); 1686 } 1687 1688 static void 1689 cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1690 { 1691 struct icl_pdu *response; 1692 struct iscsi_bhs_asynchronous_message *bhsam; 1693 struct ctl_iscsi_logout_params *cilp; 1694 struct cfiscsi_session *cs; 1695 struct cfiscsi_softc *softc; 1696 int found = 0; 1697 1698 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1699 softc = &cfiscsi_softc; 1700 1701 mtx_lock(&softc->lock); 1702 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1703 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1704 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1705 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1706 continue; 1707 1708 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1709 if (response == NULL) { 1710 ci->status = CTL_ISCSI_ERROR; 1711 snprintf(ci->error_str, sizeof(ci->error_str), 1712 "Unable to allocate memory"); 1713 mtx_unlock(&softc->lock); 1714 return; 1715 } 1716 bhsam = 1717 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1718 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1719 bhsam->bhsam_flags = 0x80; 1720 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1721 bhsam->bhsam_parameter3 = htons(10); 1722 cfiscsi_pdu_queue(response); 1723 found++; 1724 } 1725 mtx_unlock(&softc->lock); 1726 1727 if (found == 0) { 1728 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1729 snprintf(ci->error_str, sizeof(ci->error_str), 1730 "No matching connections found"); 1731 return; 1732 } 1733 1734 ci->status = CTL_ISCSI_OK; 1735 } 1736 1737 static void 1738 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1739 { 1740 struct icl_pdu *response; 1741 struct iscsi_bhs_asynchronous_message *bhsam; 1742 struct ctl_iscsi_terminate_params *citp; 1743 struct cfiscsi_session *cs; 1744 struct cfiscsi_softc *softc; 1745 int found = 0; 1746 1747 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1748 softc = &cfiscsi_softc; 1749 1750 mtx_lock(&softc->lock); 1751 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1752 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1753 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1754 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1755 continue; 1756 1757 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1758 if (response == NULL) { 1759 /* 1760 * Oh well. Just terminate the connection. 1761 */ 1762 } else { 1763 bhsam = (struct iscsi_bhs_asynchronous_message *) 1764 response->ip_bhs; 1765 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1766 bhsam->bhsam_flags = 0x80; 1767 bhsam->bhsam_0xffffffff = 0xffffffff; 1768 bhsam->bhsam_async_event = 1769 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1770 cfiscsi_pdu_queue(response); 1771 } 1772 cfiscsi_session_terminate(cs); 1773 found++; 1774 } 1775 mtx_unlock(&softc->lock); 1776 1777 if (found == 0) { 1778 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1779 snprintf(ci->error_str, sizeof(ci->error_str), 1780 "No matching connections found"); 1781 return; 1782 } 1783 1784 ci->status = CTL_ISCSI_OK; 1785 } 1786 1787 static void 1788 cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1789 { 1790 struct ctl_iscsi_limits_params *cilp; 1791 int error; 1792 1793 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1794 1795 error = icl_limits(cilp->offload, &cilp->data_segment_limit); 1796 if (error != 0) { 1797 ci->status = CTL_ISCSI_ERROR; 1798 snprintf(ci->error_str, sizeof(ci->error_str), 1799 "%s: icl_limits failed with error %d", 1800 __func__, error); 1801 return; 1802 } 1803 1804 ci->status = CTL_ISCSI_OK; 1805 } 1806 1807 #ifdef ICL_KERNEL_PROXY 1808 static void 1809 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1810 { 1811 struct ctl_iscsi_listen_params *cilp; 1812 struct sockaddr *sa; 1813 int error; 1814 1815 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1816 1817 if (cfiscsi_softc.listener == NULL) { 1818 CFISCSI_DEBUG("no listener"); 1819 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1820 ci->status = CTL_ISCSI_ERROR; 1821 return; 1822 } 1823 1824 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1825 if (error != 0) { 1826 CFISCSI_DEBUG("getsockaddr, error %d", error); 1827 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1828 ci->status = CTL_ISCSI_ERROR; 1829 return; 1830 } 1831 1832 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1833 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1834 if (error != 0) { 1835 free(sa, M_SONAME); 1836 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1837 snprintf(ci->error_str, sizeof(ci->error_str), 1838 "icl_listen_add failed, error %d", error); 1839 ci->status = CTL_ISCSI_ERROR; 1840 return; 1841 } 1842 1843 ci->status = CTL_ISCSI_OK; 1844 } 1845 1846 static void 1847 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1848 { 1849 struct ctl_iscsi_accept_params *ciap; 1850 struct cfiscsi_session *cs; 1851 int error; 1852 1853 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1854 1855 mtx_lock(&cfiscsi_softc.lock); 1856 for (;;) { 1857 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1858 if (cs->cs_waiting_for_ctld) 1859 break; 1860 } 1861 if (cs != NULL) 1862 break; 1863 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1864 if (error != 0) { 1865 mtx_unlock(&cfiscsi_softc.lock); 1866 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1867 ci->status = CTL_ISCSI_ERROR; 1868 return; 1869 } 1870 } 1871 mtx_unlock(&cfiscsi_softc.lock); 1872 1873 cs->cs_waiting_for_ctld = false; 1874 cs->cs_login_phase = true; 1875 1876 ciap->connection_id = cs->cs_id; 1877 ciap->portal_id = cs->cs_portal_id; 1878 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1879 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1880 cs->cs_initiator_sa->sa_len); 1881 if (error != 0) { 1882 snprintf(ci->error_str, sizeof(ci->error_str), 1883 "copyout failed with error %d", error); 1884 ci->status = CTL_ISCSI_ERROR; 1885 return; 1886 } 1887 1888 ci->status = CTL_ISCSI_OK; 1889 } 1890 1891 static void 1892 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1893 { 1894 struct ctl_iscsi_send_params *cisp; 1895 struct cfiscsi_session *cs; 1896 struct icl_pdu *ip; 1897 size_t datalen; 1898 void *data; 1899 int error; 1900 1901 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1902 1903 mtx_lock(&cfiscsi_softc.lock); 1904 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1905 if (cs->cs_id == cisp->connection_id) 1906 break; 1907 } 1908 if (cs == NULL) { 1909 mtx_unlock(&cfiscsi_softc.lock); 1910 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1911 ci->status = CTL_ISCSI_ERROR; 1912 return; 1913 } 1914 mtx_unlock(&cfiscsi_softc.lock); 1915 1916 #if 0 1917 if (cs->cs_login_phase == false) 1918 return (EBUSY); 1919 #endif 1920 1921 if (cs->cs_terminating) { 1922 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1923 ci->status = CTL_ISCSI_ERROR; 1924 return; 1925 } 1926 1927 datalen = cisp->data_segment_len; 1928 /* 1929 * XXX 1930 */ 1931 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1932 if (datalen > 65535) { 1933 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1934 ci->status = CTL_ISCSI_ERROR; 1935 return; 1936 } 1937 if (datalen > 0) { 1938 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1939 error = copyin(cisp->data_segment, data, datalen); 1940 if (error != 0) { 1941 free(data, M_CFISCSI); 1942 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1943 ci->status = CTL_ISCSI_ERROR; 1944 return; 1945 } 1946 } 1947 1948 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1949 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1950 if (datalen > 0) { 1951 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1952 free(data, M_CFISCSI); 1953 } 1954 CFISCSI_SESSION_LOCK(cs); 1955 icl_pdu_queue(ip); 1956 CFISCSI_SESSION_UNLOCK(cs); 1957 ci->status = CTL_ISCSI_OK; 1958 } 1959 1960 static void 1961 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1962 { 1963 struct ctl_iscsi_receive_params *cirp; 1964 struct cfiscsi_session *cs; 1965 struct icl_pdu *ip; 1966 void *data; 1967 int error; 1968 1969 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1970 1971 mtx_lock(&cfiscsi_softc.lock); 1972 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1973 if (cs->cs_id == cirp->connection_id) 1974 break; 1975 } 1976 if (cs == NULL) { 1977 mtx_unlock(&cfiscsi_softc.lock); 1978 snprintf(ci->error_str, sizeof(ci->error_str), 1979 "connection not found"); 1980 ci->status = CTL_ISCSI_ERROR; 1981 return; 1982 } 1983 mtx_unlock(&cfiscsi_softc.lock); 1984 1985 #if 0 1986 if (is->is_login_phase == false) 1987 return (EBUSY); 1988 #endif 1989 1990 CFISCSI_SESSION_LOCK(cs); 1991 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1992 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1993 if (error != 0) { 1994 CFISCSI_SESSION_UNLOCK(cs); 1995 snprintf(ci->error_str, sizeof(ci->error_str), 1996 "interrupted by signal"); 1997 ci->status = CTL_ISCSI_ERROR; 1998 return; 1999 } 2000 } 2001 2002 if (cs->cs_terminating) { 2003 CFISCSI_SESSION_UNLOCK(cs); 2004 snprintf(ci->error_str, sizeof(ci->error_str), 2005 "connection terminating"); 2006 ci->status = CTL_ISCSI_ERROR; 2007 return; 2008 } 2009 ip = cs->cs_login_pdu; 2010 cs->cs_login_pdu = NULL; 2011 CFISCSI_SESSION_UNLOCK(cs); 2012 2013 if (ip->ip_data_len > cirp->data_segment_len) { 2014 icl_pdu_free(ip); 2015 snprintf(ci->error_str, sizeof(ci->error_str), 2016 "data segment too big"); 2017 ci->status = CTL_ISCSI_ERROR; 2018 return; 2019 } 2020 2021 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2022 if (ip->ip_data_len > 0) { 2023 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2024 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2025 copyout(data, cirp->data_segment, ip->ip_data_len); 2026 free(data, M_CFISCSI); 2027 } 2028 2029 icl_pdu_free(ip); 2030 ci->status = CTL_ISCSI_OK; 2031 } 2032 2033 #endif /* !ICL_KERNEL_PROXY */ 2034 2035 static void 2036 cfiscsi_ioctl_port_create(struct ctl_req *req) 2037 { 2038 struct cfiscsi_target *ct; 2039 struct ctl_port *port; 2040 const char *target, *alias, *tags; 2041 struct scsi_vpd_id_descriptor *desc; 2042 ctl_options_t opts; 2043 int retval, len, idlen; 2044 uint16_t tag; 2045 2046 ctl_init_opts(&opts, req->num_args, req->kern_args); 2047 target = ctl_get_opt(&opts, "cfiscsi_target"); 2048 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2049 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2050 if (target == NULL || tags == NULL) { 2051 req->status = CTL_LUN_ERROR; 2052 snprintf(req->error_str, sizeof(req->error_str), 2053 "Missing required argument"); 2054 ctl_free_opts(&opts); 2055 return; 2056 } 2057 tag = strtol(tags, (char **)NULL, 10); 2058 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2059 if (ct == NULL) { 2060 req->status = CTL_LUN_ERROR; 2061 snprintf(req->error_str, sizeof(req->error_str), 2062 "failed to create target \"%s\"", target); 2063 ctl_free_opts(&opts); 2064 return; 2065 } 2066 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2067 req->status = CTL_LUN_ERROR; 2068 snprintf(req->error_str, sizeof(req->error_str), 2069 "target \"%s\" already exists", target); 2070 cfiscsi_target_release(ct); 2071 ctl_free_opts(&opts); 2072 return; 2073 } 2074 port = &ct->ct_port; 2075 // WAT 2076 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2077 goto done; 2078 2079 port->frontend = &cfiscsi_frontend; 2080 port->port_type = CTL_PORT_ISCSI; 2081 /* XXX KDM what should the real number be here? */ 2082 port->num_requested_ctl_io = 4096; 2083 port->port_name = "iscsi"; 2084 port->physical_port = tag; 2085 port->virtual_port = ct->ct_target_id; 2086 port->port_online = cfiscsi_online; 2087 port->port_offline = cfiscsi_offline; 2088 port->port_info = cfiscsi_info; 2089 port->onoff_arg = ct; 2090 port->fe_datamove = cfiscsi_datamove; 2091 port->fe_done = cfiscsi_done; 2092 2093 /* XXX KDM what should we report here? */ 2094 /* XXX These should probably be fetched from CTL. */ 2095 port->max_targets = 1; 2096 port->max_target_id = 15; 2097 port->targ_port = -1; 2098 2099 port->options = opts; 2100 STAILQ_INIT(&opts); 2101 2102 /* Generate Port ID. */ 2103 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2104 idlen = roundup2(idlen, 4); 2105 len = sizeof(struct scsi_vpd_device_id) + idlen; 2106 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2107 M_CTL, M_WAITOK | M_ZERO); 2108 port->port_devid->len = len; 2109 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2110 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2111 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2112 SVPD_ID_TYPE_SCSI_NAME; 2113 desc->length = idlen; 2114 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2115 2116 /* Generate Target ID. */ 2117 idlen = strlen(target) + 1; 2118 idlen = roundup2(idlen, 4); 2119 len = sizeof(struct scsi_vpd_device_id) + idlen; 2120 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2121 M_CTL, M_WAITOK | M_ZERO); 2122 port->target_devid->len = len; 2123 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2124 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2125 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2126 SVPD_ID_TYPE_SCSI_NAME; 2127 desc->length = idlen; 2128 strlcpy(desc->identifier, target, idlen); 2129 2130 retval = ctl_port_register(port); 2131 if (retval != 0) { 2132 ctl_free_opts(&port->options); 2133 cfiscsi_target_release(ct); 2134 free(port->port_devid, M_CFISCSI); 2135 free(port->target_devid, M_CFISCSI); 2136 req->status = CTL_LUN_ERROR; 2137 snprintf(req->error_str, sizeof(req->error_str), 2138 "ctl_port_register() failed with error %d", retval); 2139 return; 2140 } 2141 done: 2142 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2143 req->status = CTL_LUN_OK; 2144 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2145 sizeof(port->targ_port)); //XXX 2146 } 2147 2148 static void 2149 cfiscsi_ioctl_port_remove(struct ctl_req *req) 2150 { 2151 struct cfiscsi_target *ct; 2152 const char *target, *tags; 2153 ctl_options_t opts; 2154 uint16_t tag; 2155 2156 ctl_init_opts(&opts, req->num_args, req->kern_args); 2157 target = ctl_get_opt(&opts, "cfiscsi_target"); 2158 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2159 if (target == NULL || tags == NULL) { 2160 ctl_free_opts(&opts); 2161 req->status = CTL_LUN_ERROR; 2162 snprintf(req->error_str, sizeof(req->error_str), 2163 "Missing required argument"); 2164 return; 2165 } 2166 tag = strtol(tags, (char **)NULL, 10); 2167 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2168 if (ct == NULL) { 2169 ctl_free_opts(&opts); 2170 req->status = CTL_LUN_ERROR; 2171 snprintf(req->error_str, sizeof(req->error_str), 2172 "can't find target \"%s\"", target); 2173 return; 2174 } 2175 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2176 ctl_free_opts(&opts); 2177 req->status = CTL_LUN_ERROR; 2178 snprintf(req->error_str, sizeof(req->error_str), 2179 "target \"%s\" is already dying", target); 2180 return; 2181 } 2182 ctl_free_opts(&opts); 2183 2184 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2185 ctl_port_offline(&ct->ct_port); 2186 cfiscsi_target_release(ct); 2187 cfiscsi_target_release(ct); 2188 req->status = CTL_LUN_OK; 2189 } 2190 2191 static int 2192 cfiscsi_ioctl(struct cdev *dev, 2193 u_long cmd, caddr_t addr, int flag, struct thread *td) 2194 { 2195 struct ctl_iscsi *ci; 2196 struct ctl_req *req; 2197 2198 if (cmd == CTL_PORT_REQ) { 2199 req = (struct ctl_req *)addr; 2200 switch (req->reqtype) { 2201 case CTL_REQ_CREATE: 2202 cfiscsi_ioctl_port_create(req); 2203 break; 2204 case CTL_REQ_REMOVE: 2205 cfiscsi_ioctl_port_remove(req); 2206 break; 2207 default: 2208 req->status = CTL_LUN_ERROR; 2209 snprintf(req->error_str, sizeof(req->error_str), 2210 "Unsupported request type %d", req->reqtype); 2211 } 2212 return (0); 2213 } 2214 2215 if (cmd != CTL_ISCSI) 2216 return (ENOTTY); 2217 2218 ci = (struct ctl_iscsi *)addr; 2219 switch (ci->type) { 2220 case CTL_ISCSI_HANDOFF: 2221 cfiscsi_ioctl_handoff(ci); 2222 break; 2223 case CTL_ISCSI_LIST: 2224 cfiscsi_ioctl_list(ci); 2225 break; 2226 case CTL_ISCSI_LOGOUT: 2227 cfiscsi_ioctl_logout(ci); 2228 break; 2229 case CTL_ISCSI_TERMINATE: 2230 cfiscsi_ioctl_terminate(ci); 2231 break; 2232 case CTL_ISCSI_LIMITS: 2233 cfiscsi_ioctl_limits(ci); 2234 break; 2235 #ifdef ICL_KERNEL_PROXY 2236 case CTL_ISCSI_LISTEN: 2237 cfiscsi_ioctl_listen(ci); 2238 break; 2239 case CTL_ISCSI_ACCEPT: 2240 cfiscsi_ioctl_accept(ci); 2241 break; 2242 case CTL_ISCSI_SEND: 2243 cfiscsi_ioctl_send(ci); 2244 break; 2245 case CTL_ISCSI_RECEIVE: 2246 cfiscsi_ioctl_receive(ci); 2247 break; 2248 #else 2249 case CTL_ISCSI_LISTEN: 2250 case CTL_ISCSI_ACCEPT: 2251 case CTL_ISCSI_SEND: 2252 case CTL_ISCSI_RECEIVE: 2253 ci->status = CTL_ISCSI_ERROR; 2254 snprintf(ci->error_str, sizeof(ci->error_str), 2255 "%s: CTL compiled without ICL_KERNEL_PROXY", 2256 __func__); 2257 break; 2258 #endif /* !ICL_KERNEL_PROXY */ 2259 default: 2260 ci->status = CTL_ISCSI_ERROR; 2261 snprintf(ci->error_str, sizeof(ci->error_str), 2262 "%s: invalid iSCSI request type %d", __func__, ci->type); 2263 break; 2264 } 2265 2266 return (0); 2267 } 2268 2269 static void 2270 cfiscsi_target_hold(struct cfiscsi_target *ct) 2271 { 2272 2273 refcount_acquire(&ct->ct_refcount); 2274 } 2275 2276 static void 2277 cfiscsi_target_release(struct cfiscsi_target *ct) 2278 { 2279 struct cfiscsi_softc *softc; 2280 2281 softc = ct->ct_softc; 2282 mtx_lock(&softc->lock); 2283 if (refcount_release(&ct->ct_refcount)) { 2284 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2285 mtx_unlock(&softc->lock); 2286 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2287 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2288 if (ctl_port_deregister(&ct->ct_port) != 0) 2289 printf("%s: ctl_port_deregister() failed\n", 2290 __func__); 2291 } 2292 free(ct, M_CFISCSI); 2293 2294 return; 2295 } 2296 mtx_unlock(&softc->lock); 2297 } 2298 2299 static struct cfiscsi_target * 2300 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2301 { 2302 struct cfiscsi_target *ct; 2303 2304 mtx_lock(&softc->lock); 2305 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2306 if (ct->ct_tag != tag || 2307 strcmp(name, ct->ct_name) != 0 || 2308 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2309 continue; 2310 cfiscsi_target_hold(ct); 2311 mtx_unlock(&softc->lock); 2312 return (ct); 2313 } 2314 mtx_unlock(&softc->lock); 2315 2316 return (NULL); 2317 } 2318 2319 static struct cfiscsi_target * 2320 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2321 const char *alias, uint16_t tag) 2322 { 2323 struct cfiscsi_target *ct, *newct; 2324 2325 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2326 return (NULL); 2327 2328 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2329 2330 mtx_lock(&softc->lock); 2331 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2332 if (ct->ct_tag != tag || 2333 strcmp(name, ct->ct_name) != 0 || 2334 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2335 continue; 2336 cfiscsi_target_hold(ct); 2337 mtx_unlock(&softc->lock); 2338 free(newct, M_CFISCSI); 2339 return (ct); 2340 } 2341 2342 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2343 if (alias != NULL) 2344 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2345 newct->ct_tag = tag; 2346 refcount_init(&newct->ct_refcount, 1); 2347 newct->ct_softc = softc; 2348 if (TAILQ_EMPTY(&softc->targets)) 2349 softc->last_target_id = 0; 2350 newct->ct_target_id = ++softc->last_target_id; 2351 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2352 mtx_unlock(&softc->lock); 2353 2354 return (newct); 2355 } 2356 2357 static void 2358 cfiscsi_datamove_in(union ctl_io *io) 2359 { 2360 struct cfiscsi_session *cs; 2361 struct icl_pdu *request, *response; 2362 const struct iscsi_bhs_scsi_command *bhssc; 2363 struct iscsi_bhs_data_in *bhsdi; 2364 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2365 size_t len, expected_len, sg_len, buffer_offset; 2366 const char *sg_addr; 2367 int ctl_sg_count, error, i; 2368 2369 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2370 cs = PDU_SESSION(request); 2371 2372 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2373 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2374 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2375 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2376 2377 if (io->scsiio.kern_sg_entries > 0) { 2378 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2379 ctl_sg_count = io->scsiio.kern_sg_entries; 2380 } else { 2381 ctl_sglist = &ctl_sg_entry; 2382 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2383 ctl_sglist->len = io->scsiio.kern_data_len; 2384 ctl_sg_count = 1; 2385 } 2386 2387 /* 2388 * This is the total amount of data to be transferred within the current 2389 * SCSI command. We need to record it so that we can properly report 2390 * underflow/underflow. 2391 */ 2392 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2393 2394 /* 2395 * This is the offset within the current SCSI command; for the first 2396 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2397 * it will be the sum of lengths of previous ones. 2398 */ 2399 buffer_offset = io->scsiio.kern_rel_offset; 2400 2401 /* 2402 * This is the transfer length expected by the initiator. In theory, 2403 * it could be different from the correct amount of data from the SCSI 2404 * point of view, even if that doesn't make any sense. 2405 */ 2406 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2407 #if 0 2408 if (expected_len != io->scsiio.kern_total_len) { 2409 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2410 "actual length %zd", expected_len, 2411 (size_t)io->scsiio.kern_total_len); 2412 } 2413 #endif 2414 2415 if (buffer_offset >= expected_len) { 2416 #if 0 2417 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2418 "already sent the expected len", buffer_offset); 2419 #endif 2420 io->scsiio.be_move_done(io); 2421 return; 2422 } 2423 2424 i = 0; 2425 sg_addr = NULL; 2426 sg_len = 0; 2427 response = NULL; 2428 bhsdi = NULL; 2429 for (;;) { 2430 if (response == NULL) { 2431 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2432 if (response == NULL) { 2433 CFISCSI_SESSION_WARN(cs, "failed to " 2434 "allocate memory; dropping connection"); 2435 ctl_set_busy(&io->scsiio); 2436 io->scsiio.be_move_done(io); 2437 cfiscsi_session_terminate(cs); 2438 return; 2439 } 2440 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2441 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2442 bhsdi->bhsdi_initiator_task_tag = 2443 bhssc->bhssc_initiator_task_tag; 2444 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2445 PDU_EXPDATASN(request)++; 2446 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2447 } 2448 2449 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2450 if (sg_len == 0) { 2451 sg_addr = ctl_sglist[i].addr; 2452 sg_len = ctl_sglist[i].len; 2453 KASSERT(sg_len > 0, ("sg_len <= 0")); 2454 } 2455 2456 len = sg_len; 2457 2458 /* 2459 * Truncate to maximum data segment length. 2460 */ 2461 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2462 ("ip_data_len %zd >= max_data_segment_length %zd", 2463 response->ip_data_len, cs->cs_max_data_segment_length)); 2464 if (response->ip_data_len + len > 2465 cs->cs_max_data_segment_length) { 2466 len = cs->cs_max_data_segment_length - 2467 response->ip_data_len; 2468 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2469 len, sg_len)); 2470 } 2471 2472 /* 2473 * Truncate to expected data transfer length. 2474 */ 2475 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2476 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2477 buffer_offset, response->ip_data_len, expected_len)); 2478 if (buffer_offset + response->ip_data_len + len > expected_len) { 2479 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2480 "to expected data transfer length %zd", 2481 buffer_offset + response->ip_data_len + len, expected_len); 2482 len = expected_len - (buffer_offset + response->ip_data_len); 2483 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2484 len, sg_len)); 2485 } 2486 2487 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2488 if (error != 0) { 2489 CFISCSI_SESSION_WARN(cs, "failed to " 2490 "allocate memory; dropping connection"); 2491 icl_pdu_free(response); 2492 ctl_set_busy(&io->scsiio); 2493 io->scsiio.be_move_done(io); 2494 cfiscsi_session_terminate(cs); 2495 return; 2496 } 2497 sg_addr += len; 2498 sg_len -= len; 2499 2500 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2501 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2502 buffer_offset, response->ip_data_len, expected_len)); 2503 if (buffer_offset + response->ip_data_len == expected_len) { 2504 /* 2505 * Already have the amount of data the initiator wanted. 2506 */ 2507 break; 2508 } 2509 2510 if (sg_len == 0) { 2511 /* 2512 * End of scatter-gather segment; 2513 * proceed to the next one... 2514 */ 2515 if (i == ctl_sg_count - 1) { 2516 /* 2517 * ... unless this was the last one. 2518 */ 2519 break; 2520 } 2521 i++; 2522 } 2523 2524 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2525 /* 2526 * Can't stuff more data into the current PDU; 2527 * queue it. Note that's not enough to check 2528 * for kern_data_resid == 0 instead; there 2529 * may be several Data-In PDUs for the final 2530 * call to cfiscsi_datamove(), and we want 2531 * to set the F flag only on the last of them. 2532 */ 2533 buffer_offset += response->ip_data_len; 2534 if (buffer_offset == io->scsiio.kern_total_len || 2535 buffer_offset == expected_len) { 2536 buffer_offset -= response->ip_data_len; 2537 break; 2538 } 2539 cfiscsi_pdu_queue(response); 2540 response = NULL; 2541 bhsdi = NULL; 2542 } 2543 } 2544 if (response != NULL) { 2545 buffer_offset += response->ip_data_len; 2546 if (buffer_offset == io->scsiio.kern_total_len || 2547 buffer_offset == expected_len) { 2548 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2549 if (io->io_hdr.status == CTL_SUCCESS) { 2550 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2551 if (PDU_TOTAL_TRANSFER_LEN(request) < 2552 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2553 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2554 bhsdi->bhsdi_residual_count = 2555 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2556 PDU_TOTAL_TRANSFER_LEN(request)); 2557 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2558 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2559 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2560 bhsdi->bhsdi_residual_count = 2561 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2562 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2563 } 2564 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2565 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2566 } 2567 } 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 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2584 uint32_t expected_len, r2t_off, r2t_len; 2585 uint32_t target_transfer_tag; 2586 bool done; 2587 2588 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2589 cs = PDU_SESSION(request); 2590 2591 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2592 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2593 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2594 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2595 2596 /* 2597 * We need to record it so that we can properly report 2598 * underflow/underflow. 2599 */ 2600 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2601 2602 /* 2603 * Report write underflow as error since CTL and backends don't 2604 * really support it, and SCSI does not tell how to do it right. 2605 */ 2606 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2607 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2608 expected_len) { 2609 io->scsiio.io_hdr.port_status = 43; 2610 io->scsiio.be_move_done(io); 2611 return; 2612 } 2613 2614 target_transfer_tag = 2615 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2616 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2617 &target_transfer_tag); 2618 if (cdw == NULL) { 2619 CFISCSI_SESSION_WARN(cs, "failed to " 2620 "allocate memory; dropping connection"); 2621 ctl_set_busy(&io->scsiio); 2622 io->scsiio.be_move_done(io); 2623 cfiscsi_session_terminate(cs); 2624 return; 2625 } 2626 #if 0 2627 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2628 "task tag 0x%x, target transfer tag 0x%x", 2629 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2630 #endif 2631 2632 cdw->cdw_ctl_io = io; 2633 cdw->cdw_target_transfer_tag = target_transfer_tag; 2634 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2635 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2636 cdw->cdw_datasn = 0; 2637 2638 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2639 if (io->scsiio.kern_sg_entries > 0) { 2640 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2641 } else { 2642 ctl_sglist = &ctl_sg_entry; 2643 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2644 ctl_sglist->len = io->scsiio.kern_data_len; 2645 } 2646 cdw->cdw_sg_index = 0; 2647 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2648 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2649 r2t_off = io->scsiio.ext_data_filled; 2650 while (r2t_off > 0) { 2651 if (r2t_off >= cdw->cdw_sg_len) { 2652 r2t_off -= cdw->cdw_sg_len; 2653 cdw->cdw_sg_index++; 2654 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2655 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2656 continue; 2657 } 2658 cdw->cdw_sg_addr += r2t_off; 2659 cdw->cdw_sg_len -= r2t_off; 2660 r2t_off = 0; 2661 } 2662 2663 if (cs->cs_immediate_data && 2664 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2665 icl_pdu_data_segment_length(request)) { 2666 done = cfiscsi_handle_data_segment(request, cdw); 2667 if (done) { 2668 cfiscsi_data_wait_free(cs, cdw); 2669 io->scsiio.be_move_done(io); 2670 return; 2671 } 2672 } 2673 2674 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2675 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2676 cs->cs_max_burst_length); 2677 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2678 2679 CFISCSI_SESSION_LOCK(cs); 2680 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2681 CFISCSI_SESSION_UNLOCK(cs); 2682 2683 /* 2684 * XXX: We should limit the number of outstanding R2T PDUs 2685 * per task to MaxOutstandingR2T. 2686 */ 2687 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2688 if (response == NULL) { 2689 CFISCSI_SESSION_WARN(cs, "failed to " 2690 "allocate memory; dropping connection"); 2691 ctl_set_busy(&io->scsiio); 2692 io->scsiio.be_move_done(io); 2693 cfiscsi_session_terminate(cs); 2694 return; 2695 } 2696 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2697 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2698 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2699 bhsr2t->bhsr2t_flags = 0x80; 2700 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2701 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2702 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2703 /* 2704 * XXX: Here we assume that cfiscsi_datamove() won't ever 2705 * be running concurrently on several CPUs for a given 2706 * command. 2707 */ 2708 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2709 PDU_R2TSN(request)++; 2710 /* 2711 * This is the offset within the current SCSI command; 2712 * i.e. for the first call of datamove(), it will be 0, 2713 * and for subsequent ones it will be the sum of lengths 2714 * of previous ones. 2715 * 2716 * The ext_data_filled is to account for unsolicited 2717 * (immediate) data that might have already arrived. 2718 */ 2719 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2720 /* 2721 * This is the total length (sum of S/G lengths) this call 2722 * to cfiscsi_datamove() is supposed to handle, limited by 2723 * MaxBurstLength. 2724 */ 2725 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2726 cfiscsi_pdu_queue(response); 2727 } 2728 2729 static void 2730 cfiscsi_datamove(union ctl_io *io) 2731 { 2732 2733 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2734 cfiscsi_datamove_in(io); 2735 else { 2736 /* We hadn't received anything during this datamove yet. */ 2737 io->scsiio.ext_data_filled = 0; 2738 cfiscsi_datamove_out(io); 2739 } 2740 } 2741 2742 static void 2743 cfiscsi_scsi_command_done(union ctl_io *io) 2744 { 2745 struct icl_pdu *request, *response; 2746 struct iscsi_bhs_scsi_command *bhssc; 2747 struct iscsi_bhs_scsi_response *bhssr; 2748 #ifdef DIAGNOSTIC 2749 struct cfiscsi_data_wait *cdw; 2750 #endif 2751 struct cfiscsi_session *cs; 2752 uint16_t sense_length; 2753 2754 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2755 cs = PDU_SESSION(request); 2756 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2757 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2758 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2759 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2760 2761 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2762 // bhssc->bhssc_initiator_task_tag); 2763 2764 #ifdef DIAGNOSTIC 2765 CFISCSI_SESSION_LOCK(cs); 2766 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2767 KASSERT(bhssc->bhssc_initiator_task_tag != 2768 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2769 CFISCSI_SESSION_UNLOCK(cs); 2770 #endif 2771 2772 /* 2773 * Do not return status for aborted commands. 2774 * There are exceptions, but none supported by CTL yet. 2775 */ 2776 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2777 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2778 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2779 ctl_free_io(io); 2780 icl_pdu_free(request); 2781 return; 2782 } 2783 2784 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2785 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2786 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2787 bhssr->bhssr_flags = 0x80; 2788 /* 2789 * XXX: We don't deal with bidirectional under/overflows; 2790 * does anything actually support those? 2791 */ 2792 if (PDU_TOTAL_TRANSFER_LEN(request) < 2793 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2794 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2795 bhssr->bhssr_residual_count = 2796 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2797 PDU_TOTAL_TRANSFER_LEN(request)); 2798 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2799 // ntohl(bhssr->bhssr_residual_count)); 2800 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2801 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2802 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2803 bhssr->bhssr_residual_count = 2804 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2805 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2806 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2807 // ntohl(bhssr->bhssr_residual_count)); 2808 } 2809 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2810 bhssr->bhssr_status = io->scsiio.scsi_status; 2811 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2812 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2813 2814 if (io->scsiio.sense_len > 0) { 2815 #if 0 2816 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2817 io->scsiio.sense_len); 2818 #endif 2819 sense_length = htons(io->scsiio.sense_len); 2820 icl_pdu_append_data(response, 2821 &sense_length, sizeof(sense_length), M_WAITOK); 2822 icl_pdu_append_data(response, 2823 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2824 } 2825 2826 ctl_free_io(io); 2827 icl_pdu_free(request); 2828 cfiscsi_pdu_queue(response); 2829 } 2830 2831 static void 2832 cfiscsi_task_management_done(union ctl_io *io) 2833 { 2834 struct icl_pdu *request, *response; 2835 struct iscsi_bhs_task_management_request *bhstmr; 2836 struct iscsi_bhs_task_management_response *bhstmr2; 2837 struct cfiscsi_data_wait *cdw, *tmpcdw; 2838 struct cfiscsi_session *cs, *tcs; 2839 struct cfiscsi_softc *softc; 2840 int cold_reset = 0; 2841 2842 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2843 cs = PDU_SESSION(request); 2844 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2845 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2846 ISCSI_BHS_OPCODE_TASK_REQUEST, 2847 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2848 2849 #if 0 2850 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2851 bhstmr->bhstmr_initiator_task_tag, 2852 bhstmr->bhstmr_referenced_task_tag); 2853 #endif 2854 2855 if ((bhstmr->bhstmr_function & ~0x80) == 2856 BHSTMR_FUNCTION_ABORT_TASK) { 2857 /* 2858 * Make sure we no longer wait for Data-Out for this command. 2859 */ 2860 CFISCSI_SESSION_LOCK(cs); 2861 TAILQ_FOREACH_SAFE(cdw, 2862 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2863 if (bhstmr->bhstmr_referenced_task_tag != 2864 cdw->cdw_initiator_task_tag) 2865 continue; 2866 2867 #if 0 2868 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2869 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2870 #endif 2871 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2872 cdw, cdw_next); 2873 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2874 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2875 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2876 cfiscsi_data_wait_free(cs, cdw); 2877 } 2878 CFISCSI_SESSION_UNLOCK(cs); 2879 } 2880 if ((bhstmr->bhstmr_function & ~0x80) == 2881 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2882 io->io_hdr.status == CTL_SUCCESS) 2883 cold_reset = 1; 2884 2885 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2886 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2887 response->ip_bhs; 2888 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2889 bhstmr2->bhstmr_flags = 0x80; 2890 switch (io->taskio.task_status) { 2891 case CTL_TASK_FUNCTION_COMPLETE: 2892 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2893 break; 2894 case CTL_TASK_FUNCTION_SUCCEEDED: 2895 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2896 break; 2897 case CTL_TASK_LUN_DOES_NOT_EXIST: 2898 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2899 break; 2900 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2901 default: 2902 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2903 break; 2904 } 2905 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2906 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2907 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2908 2909 ctl_free_io(io); 2910 icl_pdu_free(request); 2911 cfiscsi_pdu_queue(response); 2912 2913 if (cold_reset) { 2914 softc = cs->cs_target->ct_softc; 2915 mtx_lock(&softc->lock); 2916 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2917 if (tcs->cs_target == cs->cs_target) 2918 cfiscsi_session_terminate(tcs); 2919 } 2920 mtx_unlock(&softc->lock); 2921 } 2922 } 2923 2924 static void 2925 cfiscsi_done(union ctl_io *io) 2926 { 2927 struct icl_pdu *request; 2928 struct cfiscsi_session *cs; 2929 2930 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2931 ("invalid CTL status %#x", io->io_hdr.status)); 2932 2933 if (io->io_hdr.io_type == CTL_IO_TASK && 2934 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2935 /* 2936 * Implicit task termination has just completed; nothing to do. 2937 */ 2938 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2939 cs->cs_tasks_aborted = true; 2940 refcount_release(&cs->cs_outstanding_ctl_pdus); 2941 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2942 ctl_free_io(io); 2943 return; 2944 } 2945 2946 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2947 cs = PDU_SESSION(request); 2948 refcount_release(&cs->cs_outstanding_ctl_pdus); 2949 2950 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2951 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2952 cfiscsi_scsi_command_done(io); 2953 break; 2954 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2955 cfiscsi_task_management_done(io); 2956 break; 2957 default: 2958 panic("cfiscsi_done called with wrong opcode 0x%x", 2959 request->ip_bhs->bhs_opcode); 2960 } 2961 } 2962