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/socket.h> 53 #include <sys/sysctl.h> 54 #include <sys/systm.h> 55 #include <sys/uio.h> 56 #include <sys/unistd.h> 57 #include <vm/uma.h> 58 59 #include <cam/scsi/scsi_all.h> 60 #include <cam/scsi/scsi_da.h> 61 #include <cam/ctl/ctl_io.h> 62 #include <cam/ctl/ctl.h> 63 #include <cam/ctl/ctl_backend.h> 64 #include <cam/ctl/ctl_error.h> 65 #include <cam/ctl/ctl_frontend.h> 66 #include <cam/ctl/ctl_debug.h> 67 #include <cam/ctl/ctl_ha.h> 68 #include <cam/ctl/ctl_ioctl.h> 69 #include <cam/ctl/ctl_private.h> 70 71 #include <dev/iscsi/icl.h> 72 #include <dev/iscsi/icl_wrappers.h> 73 #include <dev/iscsi/iscsi_proto.h> 74 #include <cam/ctl/ctl_frontend_iscsi.h> 75 76 #ifdef ICL_KERNEL_PROXY 77 #include <sys/socketvar.h> 78 #endif 79 80 #ifdef ICL_KERNEL_PROXY 81 FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 82 #endif 83 84 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 85 static uma_zone_t cfiscsi_data_wait_zone; 86 87 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 88 "CAM Target Layer iSCSI Frontend"); 89 static int debug = 1; 90 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 91 &debug, 1, "Enable debug messages"); 92 static int ping_timeout = 5; 93 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95 static int login_timeout = 60; 96 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 97 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 98 static int maxcmdsn_delta = 256; 99 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 100 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 101 "without confirmation"); 102 103 #define CFISCSI_DEBUG(X, ...) \ 104 do { \ 105 if (debug > 1) { \ 106 printf("%s: " X "\n", \ 107 __func__, ## __VA_ARGS__); \ 108 } \ 109 } while (0) 110 111 #define CFISCSI_WARN(X, ...) \ 112 do { \ 113 if (debug > 0) { \ 114 printf("WARNING: %s: " X "\n", \ 115 __func__, ## __VA_ARGS__); \ 116 } \ 117 } while (0) 118 119 #define CFISCSI_SESSION_DEBUG(S, X, ...) \ 120 do { \ 121 if (debug > 1) { \ 122 printf("%s: %s (%s): " X "\n", \ 123 __func__, S->cs_initiator_addr, \ 124 S->cs_initiator_name, ## __VA_ARGS__); \ 125 } \ 126 } while (0) 127 128 #define CFISCSI_SESSION_WARN(S, X, ...) \ 129 do { \ 130 if (debug > 0) { \ 131 printf("WARNING: %s (%s): " X "\n", \ 132 S->cs_initiator_addr, \ 133 S->cs_initiator_name, ## __VA_ARGS__); \ 134 } \ 135 } while (0) 136 137 #define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 138 #define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 139 #define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 140 141 #define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 142 #define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 143 #define PDU_EXPDATASN(X) (X)->ip_prv0 144 #define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 145 #define PDU_R2TSN(X) (X)->ip_prv2 146 147 int cfiscsi_init(void); 148 static void cfiscsi_online(void *arg); 149 static void cfiscsi_offline(void *arg); 150 static int cfiscsi_info(void *arg, struct sbuf *sb); 151 static int cfiscsi_ioctl(struct cdev *dev, 152 u_long cmd, caddr_t addr, int flag, struct thread *td); 153 static void cfiscsi_datamove(union ctl_io *io); 154 static void cfiscsi_datamove_in(union ctl_io *io); 155 static void cfiscsi_datamove_out(union ctl_io *io); 156 static void cfiscsi_done(union ctl_io *io); 157 static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 158 static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 159 static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 160 static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 161 static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 162 static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 163 static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 164 static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 165 struct cfiscsi_session *cs, union ctl_io *io, 166 uint32_t initiator_task_tag, 167 uint32_t *target_transfer_tagp); 168 static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 169 struct cfiscsi_data_wait *cdw); 170 static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 171 *softc, const char *name, uint16_t tag); 172 static struct cfiscsi_target *cfiscsi_target_find_or_create( 173 struct cfiscsi_softc *softc, const char *name, const char *alias, 174 uint16_t tag); 175 static void cfiscsi_target_release(struct cfiscsi_target *ct); 176 static void cfiscsi_session_delete(struct cfiscsi_session *cs); 177 178 static struct cfiscsi_softc cfiscsi_softc; 179 180 static struct ctl_frontend cfiscsi_frontend = 181 { 182 .name = "iscsi", 183 .init = cfiscsi_init, 184 .ioctl = cfiscsi_ioctl, 185 }; 186 CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 187 MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 188 189 static struct icl_pdu * 190 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 191 { 192 193 return (icl_pdu_new(request->ip_conn, flags)); 194 } 195 196 static bool 197 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 198 { 199 const struct iscsi_bhs_scsi_command *bhssc; 200 struct cfiscsi_session *cs; 201 uint32_t cmdsn, expstatsn; 202 203 cs = PDU_SESSION(request); 204 205 /* 206 * Every incoming PDU - not just NOP-Out - resets the ping timer. 207 * The purpose of the timeout is to reset the connection when it stalls; 208 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 209 * in some queue. 210 * 211 * XXX: Locking? 212 */ 213 cs->cs_timeout = 0; 214 215 /* 216 * Data-Out PDUs don't contain CmdSN. 217 */ 218 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 219 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 220 return (false); 221 222 /* 223 * We're only using fields common for all the request 224 * (initiator -> target) PDUs. 225 */ 226 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 227 cmdsn = ntohl(bhssc->bhssc_cmdsn); 228 expstatsn = ntohl(bhssc->bhssc_expstatsn); 229 230 CFISCSI_SESSION_LOCK(cs); 231 #if 0 232 if (expstatsn != cs->cs_statsn) { 233 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 234 "while current StatSN is %d", expstatsn, 235 cs->cs_statsn); 236 } 237 #endif 238 239 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 240 /* 241 * The target MUST silently ignore any non-immediate command 242 * outside of this range. 243 */ 244 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 245 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 246 CFISCSI_SESSION_UNLOCK(cs); 247 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 248 "while expected %u", cmdsn, cs->cs_cmdsn); 249 return (true); 250 } 251 252 /* 253 * We don't support multiple connections now, so any 254 * discontinuity in CmdSN means lost PDUs. Since we don't 255 * support PDU retransmission -- terminate the connection. 256 */ 257 if (cmdsn != cs->cs_cmdsn) { 258 CFISCSI_SESSION_UNLOCK(cs); 259 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 260 "while expected %u; dropping connection", 261 cmdsn, cs->cs_cmdsn); 262 cfiscsi_session_terminate(cs); 263 return (true); 264 } 265 cs->cs_cmdsn++; 266 } 267 268 CFISCSI_SESSION_UNLOCK(cs); 269 270 return (false); 271 } 272 273 static void 274 cfiscsi_pdu_handle(struct icl_pdu *request) 275 { 276 struct cfiscsi_session *cs; 277 bool ignore; 278 279 cs = PDU_SESSION(request); 280 281 ignore = cfiscsi_pdu_update_cmdsn(request); 282 if (ignore) { 283 icl_pdu_free(request); 284 return; 285 } 286 287 /* 288 * Handle the PDU; this includes e.g. receiving the remaining 289 * part of PDU and submitting the SCSI command to CTL 290 * or queueing a reply. The handling routine is responsible 291 * for freeing the PDU when it's no longer needed. 292 */ 293 switch (request->ip_bhs->bhs_opcode & 294 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 295 case ISCSI_BHS_OPCODE_NOP_OUT: 296 cfiscsi_pdu_handle_nop_out(request); 297 break; 298 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 299 cfiscsi_pdu_handle_scsi_command(request); 300 break; 301 case ISCSI_BHS_OPCODE_TASK_REQUEST: 302 cfiscsi_pdu_handle_task_request(request); 303 break; 304 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 305 cfiscsi_pdu_handle_data_out(request); 306 break; 307 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 308 cfiscsi_pdu_handle_logout_request(request); 309 break; 310 default: 311 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 312 "opcode 0x%x; dropping connection", 313 request->ip_bhs->bhs_opcode); 314 icl_pdu_free(request); 315 cfiscsi_session_terminate(cs); 316 } 317 318 } 319 320 static void 321 cfiscsi_receive_callback(struct icl_pdu *request) 322 { 323 struct cfiscsi_session *cs; 324 325 cs = PDU_SESSION(request); 326 327 #ifdef ICL_KERNEL_PROXY 328 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 329 if (cs->cs_login_pdu == NULL) 330 cs->cs_login_pdu = request; 331 else 332 icl_pdu_free(request); 333 cv_signal(&cs->cs_login_cv); 334 return; 335 } 336 #endif 337 338 cfiscsi_pdu_handle(request); 339 } 340 341 static void 342 cfiscsi_error_callback(struct icl_conn *ic) 343 { 344 struct cfiscsi_session *cs; 345 346 cs = CONN_SESSION(ic); 347 348 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 349 cfiscsi_session_terminate(cs); 350 } 351 352 static int 353 cfiscsi_pdu_prepare(struct icl_pdu *response) 354 { 355 struct cfiscsi_session *cs; 356 struct iscsi_bhs_scsi_response *bhssr; 357 bool advance_statsn = true; 358 359 cs = PDU_SESSION(response); 360 361 CFISCSI_SESSION_LOCK_ASSERT(cs); 362 363 /* 364 * We're only using fields common for all the response 365 * (target -> initiator) PDUs. 366 */ 367 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 368 369 /* 370 * 10.8.3: "The StatSN for this connection is not advanced 371 * after this PDU is sent." 372 */ 373 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 374 advance_statsn = false; 375 376 /* 377 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 378 * StatSN for the connection is not advanced after this PDU is sent." 379 */ 380 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 381 bhssr->bhssr_initiator_task_tag == 0xffffffff) 382 advance_statsn = false; 383 384 /* 385 * See the comment below - StatSN is not meaningful and must 386 * not be advanced. 387 */ 388 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 389 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 390 advance_statsn = false; 391 392 /* 393 * 10.7.3: "The fields StatSN, Status, and Residual Count 394 * only have meaningful content if the S bit is set to 1." 395 */ 396 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 397 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 398 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 399 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 400 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 401 402 if (advance_statsn) 403 cs->cs_statsn++; 404 405 return (0); 406 } 407 408 static void 409 cfiscsi_pdu_queue(struct icl_pdu *response) 410 { 411 struct cfiscsi_session *cs; 412 413 cs = PDU_SESSION(response); 414 415 CFISCSI_SESSION_LOCK(cs); 416 cfiscsi_pdu_prepare(response); 417 icl_pdu_queue(response); 418 CFISCSI_SESSION_UNLOCK(cs); 419 } 420 421 static void 422 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 423 { 424 struct cfiscsi_session *cs; 425 struct iscsi_bhs_nop_out *bhsno; 426 struct iscsi_bhs_nop_in *bhsni; 427 struct icl_pdu *response; 428 void *data = NULL; 429 size_t datasize; 430 int error; 431 432 cs = PDU_SESSION(request); 433 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 434 435 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 436 /* 437 * Nothing to do, iscsi_pdu_update_statsn() already 438 * zeroed the timeout. 439 */ 440 icl_pdu_free(request); 441 return; 442 } 443 444 datasize = icl_pdu_data_segment_length(request); 445 if (datasize > 0) { 446 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 447 if (data == NULL) { 448 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 449 "dropping connection"); 450 icl_pdu_free(request); 451 cfiscsi_session_terminate(cs); 452 return; 453 } 454 icl_pdu_get_data(request, 0, data, datasize); 455 } 456 457 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 458 if (response == NULL) { 459 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 460 "droppping connection"); 461 free(data, M_CFISCSI); 462 icl_pdu_free(request); 463 cfiscsi_session_terminate(cs); 464 return; 465 } 466 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 467 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 468 bhsni->bhsni_flags = 0x80; 469 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 470 bhsni->bhsni_target_transfer_tag = 0xffffffff; 471 if (datasize > 0) { 472 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 473 if (error != 0) { 474 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 475 "dropping connection"); 476 free(data, M_CFISCSI); 477 icl_pdu_free(request); 478 icl_pdu_free(response); 479 cfiscsi_session_terminate(cs); 480 return; 481 } 482 free(data, M_CFISCSI); 483 } 484 485 icl_pdu_free(request); 486 cfiscsi_pdu_queue(response); 487 } 488 489 static void 490 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 491 { 492 struct iscsi_bhs_scsi_command *bhssc; 493 struct cfiscsi_session *cs; 494 union ctl_io *io; 495 int error; 496 497 cs = PDU_SESSION(request); 498 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 499 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 500 // bhssc->bhssc_initiator_task_tag); 501 502 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 503 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 504 "ImmediateData=No; dropping connection"); 505 icl_pdu_free(request); 506 cfiscsi_session_terminate(cs); 507 return; 508 } 509 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 510 ctl_zero_io(io); 511 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 512 io->io_hdr.io_type = CTL_IO_SCSI; 513 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 514 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 515 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 516 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 517 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 518 case BHSSC_FLAGS_ATTR_UNTAGGED: 519 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 520 break; 521 case BHSSC_FLAGS_ATTR_SIMPLE: 522 io->scsiio.tag_type = CTL_TAG_SIMPLE; 523 break; 524 case BHSSC_FLAGS_ATTR_ORDERED: 525 io->scsiio.tag_type = CTL_TAG_ORDERED; 526 break; 527 case BHSSC_FLAGS_ATTR_HOQ: 528 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 529 break; 530 case BHSSC_FLAGS_ATTR_ACA: 531 io->scsiio.tag_type = CTL_TAG_ACA; 532 break; 533 default: 534 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 535 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 536 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 537 break; 538 } 539 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 540 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 541 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 542 error = ctl_queue(io); 543 if (error != CTL_RETVAL_COMPLETE) { 544 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 545 "dropping connection", error); 546 ctl_free_io(io); 547 refcount_release(&cs->cs_outstanding_ctl_pdus); 548 icl_pdu_free(request); 549 cfiscsi_session_terminate(cs); 550 } 551 } 552 553 static void 554 cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 555 { 556 struct iscsi_bhs_task_management_request *bhstmr; 557 struct iscsi_bhs_task_management_response *bhstmr2; 558 struct icl_pdu *response; 559 struct cfiscsi_session *cs; 560 union ctl_io *io; 561 int error; 562 563 cs = PDU_SESSION(request); 564 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 565 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 566 ctl_zero_io(io); 567 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 568 io->io_hdr.io_type = CTL_IO_TASK; 569 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 570 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 571 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 572 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 573 574 switch (bhstmr->bhstmr_function & ~0x80) { 575 case BHSTMR_FUNCTION_ABORT_TASK: 576 #if 0 577 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 578 #endif 579 io->taskio.task_action = CTL_TASK_ABORT_TASK; 580 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 581 break; 582 case BHSTMR_FUNCTION_ABORT_TASK_SET: 583 #if 0 584 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 585 #endif 586 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 587 break; 588 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 589 #if 0 590 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 591 #endif 592 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 593 break; 594 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 595 #if 0 596 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 597 #endif 598 io->taskio.task_action = CTL_TASK_LUN_RESET; 599 break; 600 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 601 #if 0 602 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 603 #endif 604 io->taskio.task_action = CTL_TASK_TARGET_RESET; 605 break; 606 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 607 #if 0 608 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 609 #endif 610 io->taskio.task_action = CTL_TASK_TARGET_RESET; 611 break; 612 case BHSTMR_FUNCTION_QUERY_TASK: 613 #if 0 614 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 615 #endif 616 io->taskio.task_action = CTL_TASK_QUERY_TASK; 617 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 618 break; 619 case BHSTMR_FUNCTION_QUERY_TASK_SET: 620 #if 0 621 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 622 #endif 623 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 624 break; 625 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 626 #if 0 627 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 628 #endif 629 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 630 break; 631 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 632 #if 0 633 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 634 #endif 635 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 636 break; 637 default: 638 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 639 bhstmr->bhstmr_function & ~0x80); 640 ctl_free_io(io); 641 642 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 643 if (response == NULL) { 644 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 645 "dropping connection"); 646 icl_pdu_free(request); 647 cfiscsi_session_terminate(cs); 648 return; 649 } 650 bhstmr2 = (struct iscsi_bhs_task_management_response *) 651 response->ip_bhs; 652 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 653 bhstmr2->bhstmr_flags = 0x80; 654 bhstmr2->bhstmr_response = 655 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 656 bhstmr2->bhstmr_initiator_task_tag = 657 bhstmr->bhstmr_initiator_task_tag; 658 icl_pdu_free(request); 659 cfiscsi_pdu_queue(response); 660 return; 661 } 662 663 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 664 error = ctl_queue(io); 665 if (error != CTL_RETVAL_COMPLETE) { 666 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 667 "dropping connection", error); 668 ctl_free_io(io); 669 refcount_release(&cs->cs_outstanding_ctl_pdus); 670 icl_pdu_free(request); 671 cfiscsi_session_terminate(cs); 672 } 673 } 674 675 static bool 676 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 677 { 678 struct iscsi_bhs_data_out *bhsdo; 679 struct cfiscsi_session *cs; 680 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 681 size_t copy_len, len, off, buffer_offset; 682 int ctl_sg_count; 683 union ctl_io *io; 684 685 cs = PDU_SESSION(request); 686 687 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 688 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 689 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 690 ISCSI_BHS_OPCODE_SCSI_COMMAND, 691 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 692 693 /* 694 * We're only using fields common for Data-Out and SCSI Command PDUs. 695 */ 696 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 697 698 io = cdw->cdw_ctl_io; 699 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 700 ("CTL_FLAG_DATA_IN")); 701 702 #if 0 703 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 704 request->ip_data_len, io->scsiio.kern_total_len); 705 #endif 706 707 if (io->scsiio.kern_sg_entries > 0) { 708 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 709 ctl_sg_count = io->scsiio.kern_sg_entries; 710 } else { 711 ctl_sglist = &ctl_sg_entry; 712 ctl_sglist->addr = io->scsiio.kern_data_ptr; 713 ctl_sglist->len = io->scsiio.kern_data_len; 714 ctl_sg_count = 1; 715 } 716 717 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 718 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 719 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 720 else 721 buffer_offset = 0; 722 len = icl_pdu_data_segment_length(request); 723 724 /* 725 * Make sure the offset, as sent by the initiator, matches the offset 726 * we're supposed to be at in the scatter-gather list. 727 */ 728 if (buffer_offset > 729 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 730 buffer_offset + len <= 731 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 732 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 733 "expected %zd; dropping connection", buffer_offset, 734 (size_t)io->scsiio.kern_rel_offset + 735 (size_t)io->scsiio.ext_data_filled); 736 ctl_set_data_phase_error(&io->scsiio); 737 cfiscsi_session_terminate(cs); 738 return (true); 739 } 740 741 /* 742 * This is the offset within the PDU data segment, as opposed 743 * to buffer_offset, which is the offset within the task (SCSI 744 * command). 745 */ 746 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 747 buffer_offset; 748 749 /* 750 * Iterate over the scatter/gather segments, filling them with data 751 * from the PDU data segment. Note that this can get called multiple 752 * times for one SCSI command; the cdw structure holds state for the 753 * scatter/gather list. 754 */ 755 for (;;) { 756 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 757 ("cdw->cdw_sg_index >= ctl_sg_count")); 758 if (cdw->cdw_sg_len == 0) { 759 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 760 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 761 } 762 KASSERT(off <= len, ("len > off")); 763 copy_len = len - off; 764 if (copy_len > cdw->cdw_sg_len) 765 copy_len = cdw->cdw_sg_len; 766 767 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 768 cdw->cdw_sg_addr += copy_len; 769 cdw->cdw_sg_len -= copy_len; 770 off += copy_len; 771 io->scsiio.ext_data_filled += copy_len; 772 io->scsiio.kern_data_resid -= copy_len; 773 774 if (cdw->cdw_sg_len == 0) { 775 /* 776 * End of current segment. 777 */ 778 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 779 /* 780 * Last segment in scatter/gather list. 781 */ 782 break; 783 } 784 cdw->cdw_sg_index++; 785 } 786 787 if (off == len) { 788 /* 789 * End of PDU payload. 790 */ 791 break; 792 } 793 } 794 795 if (len > off) { 796 /* 797 * In case of unsolicited data, it's possible that the buffer 798 * provided by CTL is smaller than negotiated FirstBurstLength. 799 * Just ignore the superfluous data; will ask for them with R2T 800 * on next call to cfiscsi_datamove(). 801 * 802 * This obviously can only happen with SCSI Command PDU. 803 */ 804 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 805 ISCSI_BHS_OPCODE_SCSI_COMMAND) 806 return (true); 807 808 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 809 "expected %zd; dropping connection", 810 icl_pdu_data_segment_length(request), off); 811 ctl_set_data_phase_error(&io->scsiio); 812 cfiscsi_session_terminate(cs); 813 return (true); 814 } 815 816 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 817 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 818 CFISCSI_SESSION_WARN(cs, "got the final packet without " 819 "the F flag; flags = 0x%x; dropping connection", 820 bhsdo->bhsdo_flags); 821 ctl_set_data_phase_error(&io->scsiio); 822 cfiscsi_session_terminate(cs); 823 return (true); 824 } 825 826 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 827 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 828 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 829 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 830 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 831 "transmitted size was %zd bytes instead of %d; " 832 "dropping connection", 833 (size_t)io->scsiio.ext_data_filled, 834 cdw->cdw_r2t_end); 835 ctl_set_data_phase_error(&io->scsiio); 836 cfiscsi_session_terminate(cs); 837 return (true); 838 } else { 839 /* 840 * For SCSI Command PDU, this just means we need to 841 * solicit more data by sending R2T. 842 */ 843 return (false); 844 } 845 } 846 847 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 848 #if 0 849 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 850 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 851 #endif 852 853 return (true); 854 } 855 856 return (false); 857 } 858 859 static void 860 cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 861 { 862 struct iscsi_bhs_data_out *bhsdo; 863 struct cfiscsi_session *cs; 864 struct cfiscsi_data_wait *cdw = NULL; 865 union ctl_io *io; 866 bool done; 867 868 cs = PDU_SESSION(request); 869 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 870 871 CFISCSI_SESSION_LOCK(cs); 872 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 873 #if 0 874 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 875 "ttt 0x%x, itt 0x%x", 876 bhsdo->bhsdo_target_transfer_tag, 877 bhsdo->bhsdo_initiator_task_tag, 878 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 879 #endif 880 if (bhsdo->bhsdo_target_transfer_tag == 881 cdw->cdw_target_transfer_tag) 882 break; 883 } 884 CFISCSI_SESSION_UNLOCK(cs); 885 if (cdw == NULL) { 886 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 887 "0x%x, not found; dropping connection", 888 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 889 icl_pdu_free(request); 890 cfiscsi_session_terminate(cs); 891 return; 892 } 893 894 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 895 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 896 "DataSN %u, while expected %u; dropping connection", 897 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 898 icl_pdu_free(request); 899 cfiscsi_session_terminate(cs); 900 return; 901 } 902 cdw->cdw_datasn++; 903 904 io = cdw->cdw_ctl_io; 905 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 906 ("CTL_FLAG_DATA_IN")); 907 908 done = cfiscsi_handle_data_segment(request, cdw); 909 if (done) { 910 CFISCSI_SESSION_LOCK(cs); 911 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 912 CFISCSI_SESSION_UNLOCK(cs); 913 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 914 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 915 cfiscsi_data_wait_free(cs, cdw); 916 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 917 if (done) 918 io->scsiio.be_move_done(io); 919 else 920 cfiscsi_datamove_out(io); 921 } 922 923 icl_pdu_free(request); 924 } 925 926 static void 927 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 928 { 929 struct iscsi_bhs_logout_request *bhslr; 930 struct iscsi_bhs_logout_response *bhslr2; 931 struct icl_pdu *response; 932 struct cfiscsi_session *cs; 933 934 cs = PDU_SESSION(request); 935 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 936 switch (bhslr->bhslr_reason & 0x7f) { 937 case BHSLR_REASON_CLOSE_SESSION: 938 case BHSLR_REASON_CLOSE_CONNECTION: 939 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 940 if (response == NULL) { 941 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 942 icl_pdu_free(request); 943 cfiscsi_session_terminate(cs); 944 return; 945 } 946 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 947 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 948 bhslr2->bhslr_flags = 0x80; 949 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 950 bhslr2->bhslr_initiator_task_tag = 951 bhslr->bhslr_initiator_task_tag; 952 icl_pdu_free(request); 953 cfiscsi_pdu_queue(response); 954 cfiscsi_session_terminate(cs); 955 break; 956 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 957 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 958 if (response == NULL) { 959 CFISCSI_SESSION_WARN(cs, 960 "failed to allocate memory; dropping connection"); 961 icl_pdu_free(request); 962 cfiscsi_session_terminate(cs); 963 return; 964 } 965 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 966 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 967 bhslr2->bhslr_flags = 0x80; 968 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 969 bhslr2->bhslr_initiator_task_tag = 970 bhslr->bhslr_initiator_task_tag; 971 icl_pdu_free(request); 972 cfiscsi_pdu_queue(response); 973 break; 974 default: 975 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 976 bhslr->bhslr_reason); 977 icl_pdu_free(request); 978 cfiscsi_session_terminate(cs); 979 break; 980 } 981 } 982 983 static void 984 cfiscsi_callout(void *context) 985 { 986 struct icl_pdu *cp; 987 struct iscsi_bhs_nop_in *bhsni; 988 struct cfiscsi_session *cs; 989 990 cs = context; 991 992 if (cs->cs_terminating) 993 return; 994 995 callout_schedule(&cs->cs_callout, 1 * hz); 996 997 atomic_add_int(&cs->cs_timeout, 1); 998 999 #ifdef ICL_KERNEL_PROXY 1000 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1001 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1002 CFISCSI_SESSION_WARN(cs, "login timed out after " 1003 "%d seconds; dropping connection", cs->cs_timeout); 1004 cfiscsi_session_terminate(cs); 1005 } 1006 return; 1007 } 1008 #endif 1009 1010 if (ping_timeout <= 0) { 1011 /* 1012 * Pings are disabled. Don't send NOP-In in this case; 1013 * user might have disabled pings to work around problems 1014 * with certain initiators that can't properly handle 1015 * NOP-In, such as iPXE. Reset the timeout, to avoid 1016 * triggering reconnection, should the user decide to 1017 * reenable them. 1018 */ 1019 cs->cs_timeout = 0; 1020 return; 1021 } 1022 1023 if (cs->cs_timeout >= ping_timeout) { 1024 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1025 "dropping connection", ping_timeout); 1026 cfiscsi_session_terminate(cs); 1027 return; 1028 } 1029 1030 /* 1031 * If the ping was reset less than one second ago - which means 1032 * that we've received some PDU during the last second - assume 1033 * the traffic flows correctly and don't bother sending a NOP-Out. 1034 * 1035 * (It's 2 - one for one second, and one for incrementing is_timeout 1036 * earlier in this routine.) 1037 */ 1038 if (cs->cs_timeout < 2) 1039 return; 1040 1041 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1042 if (cp == NULL) { 1043 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1044 return; 1045 } 1046 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1047 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1048 bhsni->bhsni_flags = 0x80; 1049 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1050 1051 cfiscsi_pdu_queue(cp); 1052 } 1053 1054 static struct cfiscsi_data_wait * 1055 cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1056 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1057 { 1058 struct cfiscsi_data_wait *cdw; 1059 int error; 1060 1061 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1062 if (cdw == NULL) { 1063 CFISCSI_SESSION_WARN(cs, 1064 "failed to allocate %zd bytes", sizeof(*cdw)); 1065 return (NULL); 1066 } 1067 1068 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1069 &cdw->cdw_icl_prv); 1070 if (error != 0) { 1071 CFISCSI_SESSION_WARN(cs, 1072 "icl_conn_transfer_setup() failed with error %d", error); 1073 uma_zfree(cfiscsi_data_wait_zone, cdw); 1074 return (NULL); 1075 } 1076 1077 cdw->cdw_ctl_io = io; 1078 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1079 cdw->cdw_initiator_task_tag = initiator_task_tag; 1080 1081 return (cdw); 1082 } 1083 1084 static void 1085 cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1086 struct cfiscsi_data_wait *cdw) 1087 { 1088 1089 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1090 uma_zfree(cfiscsi_data_wait_zone, cdw); 1091 } 1092 1093 static void 1094 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1095 { 1096 struct cfiscsi_data_wait *cdw; 1097 union ctl_io *io; 1098 int error, last, wait; 1099 1100 if (cs->cs_target == NULL) 1101 return; /* No target yet, so nothing to do. */ 1102 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1103 ctl_zero_io(io); 1104 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1105 io->io_hdr.io_type = CTL_IO_TASK; 1106 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1107 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1108 io->io_hdr.nexus.targ_lun = 0; 1109 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1110 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1111 wait = cs->cs_outstanding_ctl_pdus; 1112 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1113 error = ctl_queue(io); 1114 if (error != CTL_RETVAL_COMPLETE) { 1115 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1116 refcount_release(&cs->cs_outstanding_ctl_pdus); 1117 ctl_free_io(io); 1118 } 1119 1120 CFISCSI_SESSION_LOCK(cs); 1121 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1122 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1123 CFISCSI_SESSION_UNLOCK(cs); 1124 /* 1125 * Set nonzero port status; this prevents backends from 1126 * assuming that the data transfer actually succeeded 1127 * and writing uninitialized data to disk. 1128 */ 1129 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1130 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1131 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1132 cfiscsi_data_wait_free(cs, cdw); 1133 CFISCSI_SESSION_LOCK(cs); 1134 } 1135 CFISCSI_SESSION_UNLOCK(cs); 1136 1137 /* 1138 * Wait for CTL to terminate all the tasks. 1139 */ 1140 if (wait > 0) 1141 CFISCSI_SESSION_WARN(cs, 1142 "waiting for CTL to terminate %d tasks", wait); 1143 for (;;) { 1144 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1145 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1146 if (last != 0) 1147 break; 1148 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1149 0, "cfiscsi_terminate", hz / 100); 1150 } 1151 if (wait > 0) 1152 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1153 } 1154 1155 static void 1156 cfiscsi_maintenance_thread(void *arg) 1157 { 1158 struct cfiscsi_session *cs; 1159 1160 cs = arg; 1161 1162 for (;;) { 1163 CFISCSI_SESSION_LOCK(cs); 1164 if (cs->cs_terminating == false) 1165 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1166 CFISCSI_SESSION_UNLOCK(cs); 1167 1168 if (cs->cs_terminating) { 1169 1170 /* 1171 * We used to wait up to 30 seconds to deliver queued 1172 * PDUs to the initiator. We also tried hard to deliver 1173 * SCSI Responses for the aborted PDUs. We don't do 1174 * that anymore. We might need to revisit that. 1175 */ 1176 callout_drain(&cs->cs_callout); 1177 icl_conn_close(cs->cs_conn); 1178 1179 /* 1180 * At this point ICL receive thread is no longer 1181 * running; no new tasks can be queued. 1182 */ 1183 cfiscsi_session_terminate_tasks(cs); 1184 cfiscsi_session_delete(cs); 1185 kthread_exit(); 1186 return; 1187 } 1188 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1189 } 1190 } 1191 1192 static void 1193 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1194 { 1195 1196 if (cs->cs_terminating) 1197 return; 1198 cs->cs_terminating = true; 1199 cv_signal(&cs->cs_maintenance_cv); 1200 #ifdef ICL_KERNEL_PROXY 1201 cv_signal(&cs->cs_login_cv); 1202 #endif 1203 } 1204 1205 static int 1206 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1207 { 1208 struct cfiscsi_target *ct; 1209 char *name; 1210 int i; 1211 1212 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1213 1214 ct = cs->cs_target; 1215 name = strdup(cs->cs_initiator_id, M_CTL); 1216 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1217 if (i < 0) { 1218 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1219 i); 1220 cs->cs_ctl_initid = -1; 1221 return (1); 1222 } 1223 cs->cs_ctl_initid = i; 1224 #if 0 1225 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1226 #endif 1227 1228 return (0); 1229 } 1230 1231 static void 1232 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1233 { 1234 int error; 1235 1236 if (cs->cs_ctl_initid == -1) 1237 return; 1238 1239 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1240 if (error != 0) { 1241 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1242 error); 1243 } 1244 cs->cs_ctl_initid = -1; 1245 } 1246 1247 static struct cfiscsi_session * 1248 cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1249 { 1250 struct cfiscsi_session *cs; 1251 int error; 1252 1253 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1254 if (cs == NULL) { 1255 CFISCSI_WARN("malloc failed"); 1256 return (NULL); 1257 } 1258 cs->cs_ctl_initid = -1; 1259 1260 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1261 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1262 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1263 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1264 #ifdef ICL_KERNEL_PROXY 1265 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1266 #endif 1267 1268 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); 1269 if (cs->cs_conn == NULL) { 1270 free(cs, M_CFISCSI); 1271 return (NULL); 1272 } 1273 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1274 cs->cs_conn->ic_error = cfiscsi_error_callback; 1275 cs->cs_conn->ic_prv0 = cs; 1276 1277 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1278 if (error != 0) { 1279 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1280 free(cs, M_CFISCSI); 1281 return (NULL); 1282 } 1283 1284 mtx_lock(&softc->lock); 1285 cs->cs_id = ++softc->last_session_id; 1286 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1287 mtx_unlock(&softc->lock); 1288 1289 /* 1290 * Start pinging the initiator. 1291 */ 1292 callout_init(&cs->cs_callout, 1); 1293 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1294 1295 return (cs); 1296 } 1297 1298 static void 1299 cfiscsi_session_delete(struct cfiscsi_session *cs) 1300 { 1301 struct cfiscsi_softc *softc; 1302 1303 softc = &cfiscsi_softc; 1304 1305 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1306 ("destroying session with outstanding CTL pdus")); 1307 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1308 ("destroying session with non-empty queue")); 1309 1310 cfiscsi_session_unregister_initiator(cs); 1311 if (cs->cs_target != NULL) 1312 cfiscsi_target_release(cs->cs_target); 1313 icl_conn_close(cs->cs_conn); 1314 icl_conn_free(cs->cs_conn); 1315 1316 mtx_lock(&softc->lock); 1317 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1318 cv_signal(&softc->sessions_cv); 1319 mtx_unlock(&softc->lock); 1320 1321 free(cs, M_CFISCSI); 1322 } 1323 1324 int 1325 cfiscsi_init(void) 1326 { 1327 struct cfiscsi_softc *softc; 1328 1329 softc = &cfiscsi_softc; 1330 bzero(softc, sizeof(*softc)); 1331 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1332 1333 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1334 #ifdef ICL_KERNEL_PROXY 1335 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1336 #endif 1337 TAILQ_INIT(&softc->sessions); 1338 TAILQ_INIT(&softc->targets); 1339 1340 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1341 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1342 UMA_ALIGN_PTR, 0); 1343 1344 return (0); 1345 } 1346 1347 #ifdef ICL_KERNEL_PROXY 1348 static void 1349 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1350 { 1351 struct cfiscsi_session *cs; 1352 1353 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1354 if (cs == NULL) { 1355 CFISCSI_WARN("failed to create session"); 1356 return; 1357 } 1358 1359 icl_conn_handoff_sock(cs->cs_conn, so); 1360 cs->cs_initiator_sa = sa; 1361 cs->cs_portal_id = portal_id; 1362 cs->cs_waiting_for_ctld = true; 1363 cv_signal(&cfiscsi_softc.accept_cv); 1364 } 1365 #endif 1366 1367 static void 1368 cfiscsi_online(void *arg) 1369 { 1370 struct cfiscsi_softc *softc; 1371 struct cfiscsi_target *ct; 1372 int online; 1373 1374 ct = (struct cfiscsi_target *)arg; 1375 softc = ct->ct_softc; 1376 1377 mtx_lock(&softc->lock); 1378 if (ct->ct_online) { 1379 mtx_unlock(&softc->lock); 1380 return; 1381 } 1382 ct->ct_online = 1; 1383 online = softc->online++; 1384 mtx_unlock(&softc->lock); 1385 if (online > 0) 1386 return; 1387 1388 #ifdef ICL_KERNEL_PROXY 1389 if (softc->listener != NULL) 1390 icl_listen_free(softc->listener); 1391 softc->listener = icl_listen_new(cfiscsi_accept); 1392 #endif 1393 } 1394 1395 static void 1396 cfiscsi_offline(void *arg) 1397 { 1398 struct cfiscsi_softc *softc; 1399 struct cfiscsi_target *ct; 1400 struct cfiscsi_session *cs; 1401 int online; 1402 1403 ct = (struct cfiscsi_target *)arg; 1404 softc = ct->ct_softc; 1405 1406 mtx_lock(&softc->lock); 1407 if (!ct->ct_online) { 1408 mtx_unlock(&softc->lock); 1409 return; 1410 } 1411 ct->ct_online = 0; 1412 online = --softc->online; 1413 1414 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1415 if (cs->cs_target == ct) 1416 cfiscsi_session_terminate(cs); 1417 } 1418 do { 1419 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1420 if (cs->cs_target == ct) 1421 break; 1422 } 1423 if (cs != NULL) 1424 cv_wait(&softc->sessions_cv, &softc->lock); 1425 } while (cs != NULL && ct->ct_online == 0); 1426 mtx_unlock(&softc->lock); 1427 if (online > 0) 1428 return; 1429 1430 #ifdef ICL_KERNEL_PROXY 1431 icl_listen_free(softc->listener); 1432 softc->listener = NULL; 1433 #endif 1434 } 1435 1436 static int 1437 cfiscsi_info(void *arg, struct sbuf *sb) 1438 { 1439 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1440 int retval; 1441 1442 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1443 ct->ct_state); 1444 return (retval); 1445 } 1446 1447 static void 1448 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1449 { 1450 struct cfiscsi_softc *softc; 1451 struct cfiscsi_session *cs, *cs2; 1452 struct cfiscsi_target *ct; 1453 struct ctl_iscsi_handoff_params *cihp; 1454 int error; 1455 1456 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1457 softc = &cfiscsi_softc; 1458 1459 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1460 cihp->initiator_name, cihp->initiator_addr, 1461 cihp->target_name); 1462 1463 ct = cfiscsi_target_find(softc, cihp->target_name, 1464 cihp->portal_group_tag); 1465 if (ct == NULL) { 1466 ci->status = CTL_ISCSI_ERROR; 1467 snprintf(ci->error_str, sizeof(ci->error_str), 1468 "%s: target not found", __func__); 1469 return; 1470 } 1471 1472 #ifdef ICL_KERNEL_PROXY 1473 if (cihp->socket > 0 && cihp->connection_id > 0) { 1474 snprintf(ci->error_str, sizeof(ci->error_str), 1475 "both socket and connection_id set"); 1476 ci->status = CTL_ISCSI_ERROR; 1477 cfiscsi_target_release(ct); 1478 return; 1479 } 1480 if (cihp->socket == 0) { 1481 mtx_lock(&cfiscsi_softc.lock); 1482 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1483 if (cs->cs_id == cihp->connection_id) 1484 break; 1485 } 1486 if (cs == NULL) { 1487 mtx_unlock(&cfiscsi_softc.lock); 1488 snprintf(ci->error_str, sizeof(ci->error_str), 1489 "connection not found"); 1490 ci->status = CTL_ISCSI_ERROR; 1491 cfiscsi_target_release(ct); 1492 return; 1493 } 1494 mtx_unlock(&cfiscsi_softc.lock); 1495 } else { 1496 #endif 1497 cs = cfiscsi_session_new(softc, cihp->offload); 1498 if (cs == NULL) { 1499 ci->status = CTL_ISCSI_ERROR; 1500 snprintf(ci->error_str, sizeof(ci->error_str), 1501 "%s: cfiscsi_session_new failed", __func__); 1502 cfiscsi_target_release(ct); 1503 return; 1504 } 1505 #ifdef ICL_KERNEL_PROXY 1506 } 1507 #endif 1508 1509 /* 1510 * First PDU of Full Feature phase has the same CmdSN as the last 1511 * PDU from the Login Phase received from the initiator. Thus, 1512 * the -1 below. 1513 */ 1514 cs->cs_cmdsn = cihp->cmdsn; 1515 cs->cs_statsn = cihp->statsn; 1516 cs->cs_max_recv_data_segment_length = cihp->max_recv_data_segment_length; 1517 cs->cs_max_send_data_segment_length = cihp->max_send_data_segment_length; 1518 cs->cs_max_burst_length = cihp->max_burst_length; 1519 cs->cs_first_burst_length = cihp->first_burst_length; 1520 cs->cs_immediate_data = !!cihp->immediate_data; 1521 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1522 cs->cs_conn->ic_header_crc32c = true; 1523 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1524 cs->cs_conn->ic_data_crc32c = true; 1525 1526 strlcpy(cs->cs_initiator_name, 1527 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1528 strlcpy(cs->cs_initiator_addr, 1529 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1530 strlcpy(cs->cs_initiator_alias, 1531 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1532 memcpy(cs->cs_initiator_isid, 1533 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1534 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1535 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1536 cihp->initiator_isid[0], cihp->initiator_isid[1], 1537 cihp->initiator_isid[2], cihp->initiator_isid[3], 1538 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1539 1540 mtx_lock(&softc->lock); 1541 if (ct->ct_online == 0) { 1542 mtx_unlock(&softc->lock); 1543 cfiscsi_session_terminate(cs); 1544 cfiscsi_target_release(ct); 1545 ci->status = CTL_ISCSI_ERROR; 1546 snprintf(ci->error_str, sizeof(ci->error_str), 1547 "%s: port offline", __func__); 1548 return; 1549 } 1550 cs->cs_target = ct; 1551 mtx_unlock(&softc->lock); 1552 1553 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1554 restart: 1555 if (!cs->cs_terminating) { 1556 mtx_lock(&softc->lock); 1557 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1558 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1559 cs->cs_target == cs2->cs_target && 1560 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1561 if (strcmp(cs->cs_initiator_addr, 1562 cs2->cs_initiator_addr) != 0) { 1563 CFISCSI_SESSION_WARN(cs2, 1564 "session reinstatement from " 1565 "different address %s", 1566 cs->cs_initiator_addr); 1567 } else { 1568 CFISCSI_SESSION_DEBUG(cs2, 1569 "session reinstatement"); 1570 } 1571 cfiscsi_session_terminate(cs2); 1572 mtx_unlock(&softc->lock); 1573 pause("cfiscsi_reinstate", 1); 1574 goto restart; 1575 } 1576 } 1577 mtx_unlock(&softc->lock); 1578 } 1579 1580 /* 1581 * Register initiator with CTL. 1582 */ 1583 cfiscsi_session_register_initiator(cs); 1584 1585 #ifdef ICL_KERNEL_PROXY 1586 if (cihp->socket > 0) { 1587 #endif 1588 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1589 if (error != 0) { 1590 cfiscsi_session_terminate(cs); 1591 refcount_release(&cs->cs_outstanding_ctl_pdus); 1592 ci->status = CTL_ISCSI_ERROR; 1593 snprintf(ci->error_str, sizeof(ci->error_str), 1594 "%s: icl_conn_handoff failed with error %d", 1595 __func__, error); 1596 return; 1597 } 1598 #ifdef ICL_KERNEL_PROXY 1599 } 1600 #endif 1601 1602 #ifdef ICL_KERNEL_PROXY 1603 cs->cs_login_phase = false; 1604 1605 /* 1606 * First PDU of the Full Feature phase has likely already arrived. 1607 * We have to pick it up and execute properly. 1608 */ 1609 if (cs->cs_login_pdu != NULL) { 1610 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1611 cfiscsi_pdu_handle(cs->cs_login_pdu); 1612 cs->cs_login_pdu = NULL; 1613 } 1614 #endif 1615 1616 refcount_release(&cs->cs_outstanding_ctl_pdus); 1617 ci->status = CTL_ISCSI_OK; 1618 } 1619 1620 static void 1621 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1622 { 1623 struct ctl_iscsi_list_params *cilp; 1624 struct cfiscsi_session *cs; 1625 struct cfiscsi_softc *softc; 1626 struct sbuf *sb; 1627 int error; 1628 1629 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1630 softc = &cfiscsi_softc; 1631 1632 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1633 if (sb == NULL) { 1634 ci->status = CTL_ISCSI_ERROR; 1635 snprintf(ci->error_str, sizeof(ci->error_str), 1636 "Unable to allocate %d bytes for iSCSI session list", 1637 cilp->alloc_len); 1638 return; 1639 } 1640 1641 sbuf_printf(sb, "<ctlislist>\n"); 1642 mtx_lock(&softc->lock); 1643 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1644 #ifdef ICL_KERNEL_PROXY 1645 if (cs->cs_target == NULL) 1646 continue; 1647 #endif 1648 error = sbuf_printf(sb, "<connection id=\"%d\">" 1649 "<initiator>%s</initiator>" 1650 "<initiator_addr>%s</initiator_addr>" 1651 "<initiator_alias>%s</initiator_alias>" 1652 "<target>%s</target>" 1653 "<target_alias>%s</target_alias>" 1654 "<target_portal_group_tag>%u</target_portal_group_tag>" 1655 "<header_digest>%s</header_digest>" 1656 "<data_digest>%s</data_digest>" 1657 "<max_recv_data_segment_length>%d</max_recv_data_segment_length>" 1658 "<max_send_data_segment_length>%d</max_send_data_segment_length>" 1659 "<max_burst_length>%d</max_burst_length>" 1660 "<first_burst_length>%d</first_burst_length>" 1661 "<immediate_data>%d</immediate_data>" 1662 "<iser>%d</iser>" 1663 "<offload>%s</offload>" 1664 "</connection>\n", 1665 cs->cs_id, 1666 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1667 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1668 cs->cs_target->ct_tag, 1669 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1670 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1671 cs->cs_max_recv_data_segment_length, 1672 cs->cs_max_send_data_segment_length, 1673 cs->cs_max_burst_length, 1674 cs->cs_first_burst_length, 1675 cs->cs_immediate_data, 1676 cs->cs_conn->ic_iser, 1677 cs->cs_conn->ic_offload); 1678 if (error != 0) 1679 break; 1680 } 1681 mtx_unlock(&softc->lock); 1682 error = sbuf_printf(sb, "</ctlislist>\n"); 1683 if (error != 0) { 1684 sbuf_delete(sb); 1685 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1686 snprintf(ci->error_str, sizeof(ci->error_str), 1687 "Out of space, %d bytes is too small", cilp->alloc_len); 1688 return; 1689 } 1690 sbuf_finish(sb); 1691 1692 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1693 cilp->fill_len = sbuf_len(sb) + 1; 1694 ci->status = CTL_ISCSI_OK; 1695 sbuf_delete(sb); 1696 } 1697 1698 static void 1699 cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1700 { 1701 struct icl_pdu *response; 1702 struct iscsi_bhs_asynchronous_message *bhsam; 1703 struct ctl_iscsi_logout_params *cilp; 1704 struct cfiscsi_session *cs; 1705 struct cfiscsi_softc *softc; 1706 int found = 0; 1707 1708 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1709 softc = &cfiscsi_softc; 1710 1711 mtx_lock(&softc->lock); 1712 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1713 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1714 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1715 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1716 continue; 1717 1718 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1719 if (response == NULL) { 1720 ci->status = CTL_ISCSI_ERROR; 1721 snprintf(ci->error_str, sizeof(ci->error_str), 1722 "Unable to allocate memory"); 1723 mtx_unlock(&softc->lock); 1724 return; 1725 } 1726 bhsam = 1727 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1728 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1729 bhsam->bhsam_flags = 0x80; 1730 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1731 bhsam->bhsam_parameter3 = htons(10); 1732 cfiscsi_pdu_queue(response); 1733 found++; 1734 } 1735 mtx_unlock(&softc->lock); 1736 1737 if (found == 0) { 1738 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1739 snprintf(ci->error_str, sizeof(ci->error_str), 1740 "No matching connections found"); 1741 return; 1742 } 1743 1744 ci->status = CTL_ISCSI_OK; 1745 } 1746 1747 static void 1748 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1749 { 1750 struct icl_pdu *response; 1751 struct iscsi_bhs_asynchronous_message *bhsam; 1752 struct ctl_iscsi_terminate_params *citp; 1753 struct cfiscsi_session *cs; 1754 struct cfiscsi_softc *softc; 1755 int found = 0; 1756 1757 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1758 softc = &cfiscsi_softc; 1759 1760 mtx_lock(&softc->lock); 1761 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1762 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1763 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1764 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1765 continue; 1766 1767 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1768 if (response == NULL) { 1769 /* 1770 * Oh well. Just terminate the connection. 1771 */ 1772 } else { 1773 bhsam = (struct iscsi_bhs_asynchronous_message *) 1774 response->ip_bhs; 1775 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1776 bhsam->bhsam_flags = 0x80; 1777 bhsam->bhsam_0xffffffff = 0xffffffff; 1778 bhsam->bhsam_async_event = 1779 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1780 cfiscsi_pdu_queue(response); 1781 } 1782 cfiscsi_session_terminate(cs); 1783 found++; 1784 } 1785 mtx_unlock(&softc->lock); 1786 1787 if (found == 0) { 1788 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1789 snprintf(ci->error_str, sizeof(ci->error_str), 1790 "No matching connections found"); 1791 return; 1792 } 1793 1794 ci->status = CTL_ISCSI_OK; 1795 } 1796 1797 static void 1798 cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1799 { 1800 struct ctl_iscsi_limits_params *cilp; 1801 struct icl_drv_limits idl; 1802 int error; 1803 1804 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1805 1806 error = icl_limits(cilp->offload, false, &idl); 1807 if (error != 0) { 1808 ci->status = CTL_ISCSI_ERROR; 1809 snprintf(ci->error_str, sizeof(ci->error_str), 1810 "%s: icl_limits failed with error %d", 1811 __func__, error); 1812 return; 1813 } 1814 1815 cilp->max_recv_data_segment_length = 1816 idl.idl_max_recv_data_segment_length; 1817 cilp->max_send_data_segment_length = 1818 idl.idl_max_send_data_segment_length; 1819 cilp->max_burst_length = idl.idl_max_burst_length; 1820 cilp->first_burst_length = idl.idl_first_burst_length; 1821 1822 ci->status = CTL_ISCSI_OK; 1823 } 1824 1825 #ifdef ICL_KERNEL_PROXY 1826 static void 1827 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1828 { 1829 struct ctl_iscsi_listen_params *cilp; 1830 struct sockaddr *sa; 1831 int error; 1832 1833 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1834 1835 if (cfiscsi_softc.listener == NULL) { 1836 CFISCSI_DEBUG("no listener"); 1837 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1838 ci->status = CTL_ISCSI_ERROR; 1839 return; 1840 } 1841 1842 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1843 if (error != 0) { 1844 CFISCSI_DEBUG("getsockaddr, error %d", error); 1845 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1846 ci->status = CTL_ISCSI_ERROR; 1847 return; 1848 } 1849 1850 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1851 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1852 if (error != 0) { 1853 free(sa, M_SONAME); 1854 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1855 snprintf(ci->error_str, sizeof(ci->error_str), 1856 "icl_listen_add failed, error %d", error); 1857 ci->status = CTL_ISCSI_ERROR; 1858 return; 1859 } 1860 1861 ci->status = CTL_ISCSI_OK; 1862 } 1863 1864 static void 1865 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1866 { 1867 struct ctl_iscsi_accept_params *ciap; 1868 struct cfiscsi_session *cs; 1869 int error; 1870 1871 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1872 1873 mtx_lock(&cfiscsi_softc.lock); 1874 for (;;) { 1875 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1876 if (cs->cs_waiting_for_ctld) 1877 break; 1878 } 1879 if (cs != NULL) 1880 break; 1881 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1882 if (error != 0) { 1883 mtx_unlock(&cfiscsi_softc.lock); 1884 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1885 ci->status = CTL_ISCSI_ERROR; 1886 return; 1887 } 1888 } 1889 mtx_unlock(&cfiscsi_softc.lock); 1890 1891 cs->cs_waiting_for_ctld = false; 1892 cs->cs_login_phase = true; 1893 1894 ciap->connection_id = cs->cs_id; 1895 ciap->portal_id = cs->cs_portal_id; 1896 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1897 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1898 cs->cs_initiator_sa->sa_len); 1899 if (error != 0) { 1900 snprintf(ci->error_str, sizeof(ci->error_str), 1901 "copyout failed with error %d", error); 1902 ci->status = CTL_ISCSI_ERROR; 1903 return; 1904 } 1905 1906 ci->status = CTL_ISCSI_OK; 1907 } 1908 1909 static void 1910 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1911 { 1912 struct ctl_iscsi_send_params *cisp; 1913 struct cfiscsi_session *cs; 1914 struct icl_pdu *ip; 1915 size_t datalen; 1916 void *data; 1917 int error; 1918 1919 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1920 1921 mtx_lock(&cfiscsi_softc.lock); 1922 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1923 if (cs->cs_id == cisp->connection_id) 1924 break; 1925 } 1926 if (cs == NULL) { 1927 mtx_unlock(&cfiscsi_softc.lock); 1928 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1929 ci->status = CTL_ISCSI_ERROR; 1930 return; 1931 } 1932 mtx_unlock(&cfiscsi_softc.lock); 1933 1934 #if 0 1935 if (cs->cs_login_phase == false) 1936 return (EBUSY); 1937 #endif 1938 1939 if (cs->cs_terminating) { 1940 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1941 ci->status = CTL_ISCSI_ERROR; 1942 return; 1943 } 1944 1945 datalen = cisp->data_segment_len; 1946 /* 1947 * XXX 1948 */ 1949 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1950 if (datalen > 65535) { 1951 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1952 ci->status = CTL_ISCSI_ERROR; 1953 return; 1954 } 1955 if (datalen > 0) { 1956 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1957 error = copyin(cisp->data_segment, data, datalen); 1958 if (error != 0) { 1959 free(data, M_CFISCSI); 1960 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1961 ci->status = CTL_ISCSI_ERROR; 1962 return; 1963 } 1964 } 1965 1966 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1967 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1968 if (datalen > 0) { 1969 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1970 free(data, M_CFISCSI); 1971 } 1972 CFISCSI_SESSION_LOCK(cs); 1973 icl_pdu_queue(ip); 1974 CFISCSI_SESSION_UNLOCK(cs); 1975 ci->status = CTL_ISCSI_OK; 1976 } 1977 1978 static void 1979 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1980 { 1981 struct ctl_iscsi_receive_params *cirp; 1982 struct cfiscsi_session *cs; 1983 struct icl_pdu *ip; 1984 void *data; 1985 int error; 1986 1987 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1988 1989 mtx_lock(&cfiscsi_softc.lock); 1990 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1991 if (cs->cs_id == cirp->connection_id) 1992 break; 1993 } 1994 if (cs == NULL) { 1995 mtx_unlock(&cfiscsi_softc.lock); 1996 snprintf(ci->error_str, sizeof(ci->error_str), 1997 "connection not found"); 1998 ci->status = CTL_ISCSI_ERROR; 1999 return; 2000 } 2001 mtx_unlock(&cfiscsi_softc.lock); 2002 2003 #if 0 2004 if (is->is_login_phase == false) 2005 return (EBUSY); 2006 #endif 2007 2008 CFISCSI_SESSION_LOCK(cs); 2009 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2010 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2011 if (error != 0) { 2012 CFISCSI_SESSION_UNLOCK(cs); 2013 snprintf(ci->error_str, sizeof(ci->error_str), 2014 "interrupted by signal"); 2015 ci->status = CTL_ISCSI_ERROR; 2016 return; 2017 } 2018 } 2019 2020 if (cs->cs_terminating) { 2021 CFISCSI_SESSION_UNLOCK(cs); 2022 snprintf(ci->error_str, sizeof(ci->error_str), 2023 "connection terminating"); 2024 ci->status = CTL_ISCSI_ERROR; 2025 return; 2026 } 2027 ip = cs->cs_login_pdu; 2028 cs->cs_login_pdu = NULL; 2029 CFISCSI_SESSION_UNLOCK(cs); 2030 2031 if (ip->ip_data_len > cirp->data_segment_len) { 2032 icl_pdu_free(ip); 2033 snprintf(ci->error_str, sizeof(ci->error_str), 2034 "data segment too big"); 2035 ci->status = CTL_ISCSI_ERROR; 2036 return; 2037 } 2038 2039 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2040 if (ip->ip_data_len > 0) { 2041 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2042 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2043 copyout(data, cirp->data_segment, ip->ip_data_len); 2044 free(data, M_CFISCSI); 2045 } 2046 2047 icl_pdu_free(ip); 2048 ci->status = CTL_ISCSI_OK; 2049 } 2050 2051 #endif /* !ICL_KERNEL_PROXY */ 2052 2053 static void 2054 cfiscsi_ioctl_port_create(struct ctl_req *req) 2055 { 2056 struct cfiscsi_target *ct; 2057 struct ctl_port *port; 2058 const char *target, *alias, *tags; 2059 struct scsi_vpd_id_descriptor *desc; 2060 ctl_options_t opts; 2061 int retval, len, idlen; 2062 uint16_t tag; 2063 2064 ctl_init_opts(&opts, req->num_args, req->kern_args); 2065 target = ctl_get_opt(&opts, "cfiscsi_target"); 2066 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2067 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2068 if (target == NULL || tags == NULL) { 2069 req->status = CTL_LUN_ERROR; 2070 snprintf(req->error_str, sizeof(req->error_str), 2071 "Missing required argument"); 2072 ctl_free_opts(&opts); 2073 return; 2074 } 2075 tag = strtol(tags, (char **)NULL, 10); 2076 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2077 if (ct == NULL) { 2078 req->status = CTL_LUN_ERROR; 2079 snprintf(req->error_str, sizeof(req->error_str), 2080 "failed to create target \"%s\"", target); 2081 ctl_free_opts(&opts); 2082 return; 2083 } 2084 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2085 req->status = CTL_LUN_ERROR; 2086 snprintf(req->error_str, sizeof(req->error_str), 2087 "target \"%s\" for portal group tag %u already exists", 2088 target, tag); 2089 cfiscsi_target_release(ct); 2090 ctl_free_opts(&opts); 2091 return; 2092 } 2093 port = &ct->ct_port; 2094 // WAT 2095 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2096 goto done; 2097 2098 port->frontend = &cfiscsi_frontend; 2099 port->port_type = CTL_PORT_ISCSI; 2100 /* XXX KDM what should the real number be here? */ 2101 port->num_requested_ctl_io = 4096; 2102 port->port_name = "iscsi"; 2103 port->physical_port = tag; 2104 port->virtual_port = ct->ct_target_id; 2105 port->port_online = cfiscsi_online; 2106 port->port_offline = cfiscsi_offline; 2107 port->port_info = cfiscsi_info; 2108 port->onoff_arg = ct; 2109 port->fe_datamove = cfiscsi_datamove; 2110 port->fe_done = cfiscsi_done; 2111 2112 /* XXX KDM what should we report here? */ 2113 /* XXX These should probably be fetched from CTL. */ 2114 port->max_targets = 1; 2115 port->max_target_id = 15; 2116 port->targ_port = -1; 2117 2118 port->options = opts; 2119 STAILQ_INIT(&opts); 2120 2121 /* Generate Port ID. */ 2122 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2123 idlen = roundup2(idlen, 4); 2124 len = sizeof(struct scsi_vpd_device_id) + idlen; 2125 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2126 M_CTL, M_WAITOK | M_ZERO); 2127 port->port_devid->len = len; 2128 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2129 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2130 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2131 SVPD_ID_TYPE_SCSI_NAME; 2132 desc->length = idlen; 2133 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2134 2135 /* Generate Target ID. */ 2136 idlen = strlen(target) + 1; 2137 idlen = roundup2(idlen, 4); 2138 len = sizeof(struct scsi_vpd_device_id) + idlen; 2139 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2140 M_CTL, M_WAITOK | M_ZERO); 2141 port->target_devid->len = len; 2142 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2143 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2144 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2145 SVPD_ID_TYPE_SCSI_NAME; 2146 desc->length = idlen; 2147 strlcpy(desc->identifier, target, idlen); 2148 2149 retval = ctl_port_register(port); 2150 if (retval != 0) { 2151 ctl_free_opts(&port->options); 2152 cfiscsi_target_release(ct); 2153 free(port->port_devid, M_CFISCSI); 2154 free(port->target_devid, M_CFISCSI); 2155 req->status = CTL_LUN_ERROR; 2156 snprintf(req->error_str, sizeof(req->error_str), 2157 "ctl_port_register() failed with error %d", retval); 2158 return; 2159 } 2160 done: 2161 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2162 req->status = CTL_LUN_OK; 2163 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2164 sizeof(port->targ_port)); //XXX 2165 } 2166 2167 static void 2168 cfiscsi_ioctl_port_remove(struct ctl_req *req) 2169 { 2170 struct cfiscsi_target *ct; 2171 const char *target, *tags; 2172 ctl_options_t opts; 2173 uint16_t tag; 2174 2175 ctl_init_opts(&opts, req->num_args, req->kern_args); 2176 target = ctl_get_opt(&opts, "cfiscsi_target"); 2177 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2178 if (target == NULL || tags == NULL) { 2179 ctl_free_opts(&opts); 2180 req->status = CTL_LUN_ERROR; 2181 snprintf(req->error_str, sizeof(req->error_str), 2182 "Missing required argument"); 2183 return; 2184 } 2185 tag = strtol(tags, (char **)NULL, 10); 2186 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2187 if (ct == NULL) { 2188 ctl_free_opts(&opts); 2189 req->status = CTL_LUN_ERROR; 2190 snprintf(req->error_str, sizeof(req->error_str), 2191 "can't find target \"%s\"", target); 2192 return; 2193 } 2194 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2195 ctl_free_opts(&opts); 2196 req->status = CTL_LUN_ERROR; 2197 snprintf(req->error_str, sizeof(req->error_str), 2198 "target \"%s\" is already dying", target); 2199 return; 2200 } 2201 ctl_free_opts(&opts); 2202 2203 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2204 ctl_port_offline(&ct->ct_port); 2205 cfiscsi_target_release(ct); 2206 cfiscsi_target_release(ct); 2207 req->status = CTL_LUN_OK; 2208 } 2209 2210 static int 2211 cfiscsi_ioctl(struct cdev *dev, 2212 u_long cmd, caddr_t addr, int flag, struct thread *td) 2213 { 2214 struct ctl_iscsi *ci; 2215 struct ctl_req *req; 2216 2217 if (cmd == CTL_PORT_REQ) { 2218 req = (struct ctl_req *)addr; 2219 switch (req->reqtype) { 2220 case CTL_REQ_CREATE: 2221 cfiscsi_ioctl_port_create(req); 2222 break; 2223 case CTL_REQ_REMOVE: 2224 cfiscsi_ioctl_port_remove(req); 2225 break; 2226 default: 2227 req->status = CTL_LUN_ERROR; 2228 snprintf(req->error_str, sizeof(req->error_str), 2229 "Unsupported request type %d", req->reqtype); 2230 } 2231 return (0); 2232 } 2233 2234 if (cmd != CTL_ISCSI) 2235 return (ENOTTY); 2236 2237 ci = (struct ctl_iscsi *)addr; 2238 switch (ci->type) { 2239 case CTL_ISCSI_HANDOFF: 2240 cfiscsi_ioctl_handoff(ci); 2241 break; 2242 case CTL_ISCSI_LIST: 2243 cfiscsi_ioctl_list(ci); 2244 break; 2245 case CTL_ISCSI_LOGOUT: 2246 cfiscsi_ioctl_logout(ci); 2247 break; 2248 case CTL_ISCSI_TERMINATE: 2249 cfiscsi_ioctl_terminate(ci); 2250 break; 2251 case CTL_ISCSI_LIMITS: 2252 cfiscsi_ioctl_limits(ci); 2253 break; 2254 #ifdef ICL_KERNEL_PROXY 2255 case CTL_ISCSI_LISTEN: 2256 cfiscsi_ioctl_listen(ci); 2257 break; 2258 case CTL_ISCSI_ACCEPT: 2259 cfiscsi_ioctl_accept(ci); 2260 break; 2261 case CTL_ISCSI_SEND: 2262 cfiscsi_ioctl_send(ci); 2263 break; 2264 case CTL_ISCSI_RECEIVE: 2265 cfiscsi_ioctl_receive(ci); 2266 break; 2267 #else 2268 case CTL_ISCSI_LISTEN: 2269 case CTL_ISCSI_ACCEPT: 2270 case CTL_ISCSI_SEND: 2271 case CTL_ISCSI_RECEIVE: 2272 ci->status = CTL_ISCSI_ERROR; 2273 snprintf(ci->error_str, sizeof(ci->error_str), 2274 "%s: CTL compiled without ICL_KERNEL_PROXY", 2275 __func__); 2276 break; 2277 #endif /* !ICL_KERNEL_PROXY */ 2278 default: 2279 ci->status = CTL_ISCSI_ERROR; 2280 snprintf(ci->error_str, sizeof(ci->error_str), 2281 "%s: invalid iSCSI request type %d", __func__, ci->type); 2282 break; 2283 } 2284 2285 return (0); 2286 } 2287 2288 static void 2289 cfiscsi_target_hold(struct cfiscsi_target *ct) 2290 { 2291 2292 refcount_acquire(&ct->ct_refcount); 2293 } 2294 2295 static void 2296 cfiscsi_target_release(struct cfiscsi_target *ct) 2297 { 2298 struct cfiscsi_softc *softc; 2299 2300 softc = ct->ct_softc; 2301 mtx_lock(&softc->lock); 2302 if (refcount_release(&ct->ct_refcount)) { 2303 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2304 mtx_unlock(&softc->lock); 2305 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2306 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2307 if (ctl_port_deregister(&ct->ct_port) != 0) 2308 printf("%s: ctl_port_deregister() failed\n", 2309 __func__); 2310 } 2311 free(ct, M_CFISCSI); 2312 2313 return; 2314 } 2315 mtx_unlock(&softc->lock); 2316 } 2317 2318 static struct cfiscsi_target * 2319 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2320 { 2321 struct cfiscsi_target *ct; 2322 2323 mtx_lock(&softc->lock); 2324 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2325 if (ct->ct_tag != tag || 2326 strcmp(name, ct->ct_name) != 0 || 2327 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2328 continue; 2329 cfiscsi_target_hold(ct); 2330 mtx_unlock(&softc->lock); 2331 return (ct); 2332 } 2333 mtx_unlock(&softc->lock); 2334 2335 return (NULL); 2336 } 2337 2338 static struct cfiscsi_target * 2339 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2340 const char *alias, uint16_t tag) 2341 { 2342 struct cfiscsi_target *ct, *newct; 2343 2344 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2345 return (NULL); 2346 2347 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2348 2349 mtx_lock(&softc->lock); 2350 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2351 if (ct->ct_tag != tag || 2352 strcmp(name, ct->ct_name) != 0 || 2353 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2354 continue; 2355 cfiscsi_target_hold(ct); 2356 mtx_unlock(&softc->lock); 2357 free(newct, M_CFISCSI); 2358 return (ct); 2359 } 2360 2361 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2362 if (alias != NULL) 2363 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2364 newct->ct_tag = tag; 2365 refcount_init(&newct->ct_refcount, 1); 2366 newct->ct_softc = softc; 2367 if (TAILQ_EMPTY(&softc->targets)) 2368 softc->last_target_id = 0; 2369 newct->ct_target_id = ++softc->last_target_id; 2370 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2371 mtx_unlock(&softc->lock); 2372 2373 return (newct); 2374 } 2375 2376 static void 2377 cfiscsi_datamove_in(union ctl_io *io) 2378 { 2379 struct cfiscsi_session *cs; 2380 struct icl_pdu *request, *response; 2381 const struct iscsi_bhs_scsi_command *bhssc; 2382 struct iscsi_bhs_data_in *bhsdi; 2383 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2384 size_t len, expected_len, sg_len, buffer_offset; 2385 const char *sg_addr; 2386 int ctl_sg_count, error, i; 2387 2388 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2389 cs = PDU_SESSION(request); 2390 2391 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2392 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2393 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2394 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2395 2396 if (io->scsiio.kern_sg_entries > 0) { 2397 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2398 ctl_sg_count = io->scsiio.kern_sg_entries; 2399 } else { 2400 ctl_sglist = &ctl_sg_entry; 2401 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2402 ctl_sglist->len = io->scsiio.kern_data_len; 2403 ctl_sg_count = 1; 2404 } 2405 2406 /* 2407 * This is the total amount of data to be transferred within the current 2408 * SCSI command. We need to record it so that we can properly report 2409 * underflow/underflow. 2410 */ 2411 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2412 2413 /* 2414 * This is the offset within the current SCSI command; for the first 2415 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2416 * it will be the sum of lengths of previous ones. 2417 */ 2418 buffer_offset = io->scsiio.kern_rel_offset; 2419 2420 /* 2421 * This is the transfer length expected by the initiator. In theory, 2422 * it could be different from the correct amount of data from the SCSI 2423 * point of view, even if that doesn't make any sense. 2424 */ 2425 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2426 #if 0 2427 if (expected_len != io->scsiio.kern_total_len) { 2428 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2429 "actual length %zd", expected_len, 2430 (size_t)io->scsiio.kern_total_len); 2431 } 2432 #endif 2433 2434 if (buffer_offset >= expected_len) { 2435 #if 0 2436 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2437 "already sent the expected len", buffer_offset); 2438 #endif 2439 io->scsiio.be_move_done(io); 2440 return; 2441 } 2442 2443 i = 0; 2444 sg_addr = NULL; 2445 sg_len = 0; 2446 response = NULL; 2447 bhsdi = NULL; 2448 for (;;) { 2449 if (response == NULL) { 2450 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2451 if (response == NULL) { 2452 CFISCSI_SESSION_WARN(cs, "failed to " 2453 "allocate memory; dropping connection"); 2454 ctl_set_busy(&io->scsiio); 2455 io->scsiio.be_move_done(io); 2456 cfiscsi_session_terminate(cs); 2457 return; 2458 } 2459 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2460 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2461 bhsdi->bhsdi_initiator_task_tag = 2462 bhssc->bhssc_initiator_task_tag; 2463 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2464 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2465 PDU_EXPDATASN(request)++; 2466 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2467 } 2468 2469 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2470 if (sg_len == 0) { 2471 sg_addr = ctl_sglist[i].addr; 2472 sg_len = ctl_sglist[i].len; 2473 KASSERT(sg_len > 0, ("sg_len <= 0")); 2474 } 2475 2476 len = sg_len; 2477 2478 /* 2479 * Truncate to maximum data segment length. 2480 */ 2481 KASSERT(response->ip_data_len < cs->cs_max_send_data_segment_length, 2482 ("ip_data_len %zd >= max_send_data_segment_length %d", 2483 response->ip_data_len, cs->cs_max_send_data_segment_length)); 2484 if (response->ip_data_len + len > 2485 cs->cs_max_send_data_segment_length) { 2486 len = cs->cs_max_send_data_segment_length - 2487 response->ip_data_len; 2488 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2489 len, sg_len)); 2490 } 2491 2492 /* 2493 * Truncate to expected data transfer length. 2494 */ 2495 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2496 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2497 buffer_offset, response->ip_data_len, expected_len)); 2498 if (buffer_offset + response->ip_data_len + len > expected_len) { 2499 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2500 "to expected data transfer length %zd", 2501 buffer_offset + response->ip_data_len + len, expected_len); 2502 len = expected_len - (buffer_offset + response->ip_data_len); 2503 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2504 len, sg_len)); 2505 } 2506 2507 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2508 if (error != 0) { 2509 CFISCSI_SESSION_WARN(cs, "failed to " 2510 "allocate memory; dropping connection"); 2511 icl_pdu_free(response); 2512 ctl_set_busy(&io->scsiio); 2513 io->scsiio.be_move_done(io); 2514 cfiscsi_session_terminate(cs); 2515 return; 2516 } 2517 sg_addr += len; 2518 sg_len -= len; 2519 io->scsiio.kern_data_resid -= len; 2520 2521 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2522 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2523 buffer_offset, response->ip_data_len, expected_len)); 2524 if (buffer_offset + response->ip_data_len == expected_len) { 2525 /* 2526 * Already have the amount of data the initiator wanted. 2527 */ 2528 break; 2529 } 2530 2531 if (sg_len == 0) { 2532 /* 2533 * End of scatter-gather segment; 2534 * proceed to the next one... 2535 */ 2536 if (i == ctl_sg_count - 1) { 2537 /* 2538 * ... unless this was the last one. 2539 */ 2540 break; 2541 } 2542 i++; 2543 } 2544 2545 if (response->ip_data_len == cs->cs_max_send_data_segment_length) { 2546 /* 2547 * Can't stuff more data into the current PDU; 2548 * queue it. Note that's not enough to check 2549 * for kern_data_resid == 0 instead; there 2550 * may be several Data-In PDUs for the final 2551 * call to cfiscsi_datamove(), and we want 2552 * to set the F flag only on the last of them. 2553 */ 2554 buffer_offset += response->ip_data_len; 2555 if (buffer_offset == io->scsiio.kern_total_len || 2556 buffer_offset == expected_len) { 2557 buffer_offset -= response->ip_data_len; 2558 break; 2559 } 2560 cfiscsi_pdu_queue(response); 2561 response = NULL; 2562 bhsdi = NULL; 2563 } 2564 } 2565 if (response != NULL) { 2566 buffer_offset += response->ip_data_len; 2567 if (buffer_offset == io->scsiio.kern_total_len || 2568 buffer_offset == expected_len) { 2569 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2570 if (io->io_hdr.status == CTL_SUCCESS) { 2571 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2572 if (PDU_TOTAL_TRANSFER_LEN(request) < 2573 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2574 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2575 bhsdi->bhsdi_residual_count = 2576 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2577 PDU_TOTAL_TRANSFER_LEN(request)); 2578 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2579 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2580 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2581 bhsdi->bhsdi_residual_count = 2582 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2583 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2584 } 2585 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2586 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2587 } 2588 } 2589 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2590 cfiscsi_pdu_queue(response); 2591 } 2592 2593 io->scsiio.be_move_done(io); 2594 } 2595 2596 static void 2597 cfiscsi_datamove_out(union ctl_io *io) 2598 { 2599 struct cfiscsi_session *cs; 2600 struct icl_pdu *request, *response; 2601 const struct iscsi_bhs_scsi_command *bhssc; 2602 struct iscsi_bhs_r2t *bhsr2t; 2603 struct cfiscsi_data_wait *cdw; 2604 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2605 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2606 uint32_t target_transfer_tag; 2607 bool done; 2608 2609 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2610 cs = PDU_SESSION(request); 2611 2612 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2613 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2614 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2615 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2616 2617 /* 2618 * We need to record it so that we can properly report 2619 * underflow/underflow. 2620 */ 2621 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2622 2623 /* 2624 * Complete write underflow. Not a single byte to read. Return. 2625 */ 2626 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2627 if (io->scsiio.kern_rel_offset > expected_len) { 2628 io->scsiio.be_move_done(io); 2629 return; 2630 } 2631 datamove_len = MIN(io->scsiio.kern_data_len, 2632 expected_len - io->scsiio.kern_rel_offset); 2633 2634 target_transfer_tag = 2635 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2636 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2637 &target_transfer_tag); 2638 if (cdw == NULL) { 2639 CFISCSI_SESSION_WARN(cs, "failed to " 2640 "allocate memory; dropping connection"); 2641 ctl_set_busy(&io->scsiio); 2642 io->scsiio.be_move_done(io); 2643 cfiscsi_session_terminate(cs); 2644 return; 2645 } 2646 #if 0 2647 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2648 "task tag 0x%x, target transfer tag 0x%x", 2649 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2650 #endif 2651 2652 cdw->cdw_ctl_io = io; 2653 cdw->cdw_target_transfer_tag = target_transfer_tag; 2654 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2655 cdw->cdw_r2t_end = datamove_len; 2656 cdw->cdw_datasn = 0; 2657 2658 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2659 if (io->scsiio.kern_sg_entries > 0) { 2660 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2661 } else { 2662 ctl_sglist = &ctl_sg_entry; 2663 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2664 ctl_sglist->len = datamove_len; 2665 } 2666 cdw->cdw_sg_index = 0; 2667 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2668 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2669 r2t_off = io->scsiio.ext_data_filled; 2670 while (r2t_off > 0) { 2671 if (r2t_off >= cdw->cdw_sg_len) { 2672 r2t_off -= cdw->cdw_sg_len; 2673 cdw->cdw_sg_index++; 2674 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2675 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2676 continue; 2677 } 2678 cdw->cdw_sg_addr += r2t_off; 2679 cdw->cdw_sg_len -= r2t_off; 2680 r2t_off = 0; 2681 } 2682 2683 if (cs->cs_immediate_data && 2684 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2685 icl_pdu_data_segment_length(request)) { 2686 done = cfiscsi_handle_data_segment(request, cdw); 2687 if (done) { 2688 cfiscsi_data_wait_free(cs, cdw); 2689 io->scsiio.be_move_done(io); 2690 return; 2691 } 2692 } 2693 2694 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2695 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2696 cs->cs_max_burst_length); 2697 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2698 2699 CFISCSI_SESSION_LOCK(cs); 2700 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2701 CFISCSI_SESSION_UNLOCK(cs); 2702 2703 /* 2704 * XXX: We should limit the number of outstanding R2T PDUs 2705 * per task to MaxOutstandingR2T. 2706 */ 2707 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2708 if (response == NULL) { 2709 CFISCSI_SESSION_WARN(cs, "failed to " 2710 "allocate memory; dropping connection"); 2711 ctl_set_busy(&io->scsiio); 2712 io->scsiio.be_move_done(io); 2713 cfiscsi_session_terminate(cs); 2714 return; 2715 } 2716 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2717 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2718 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2719 bhsr2t->bhsr2t_flags = 0x80; 2720 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2721 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2722 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2723 /* 2724 * XXX: Here we assume that cfiscsi_datamove() won't ever 2725 * be running concurrently on several CPUs for a given 2726 * command. 2727 */ 2728 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2729 PDU_R2TSN(request)++; 2730 /* 2731 * This is the offset within the current SCSI command; 2732 * i.e. for the first call of datamove(), it will be 0, 2733 * and for subsequent ones it will be the sum of lengths 2734 * of previous ones. 2735 * 2736 * The ext_data_filled is to account for unsolicited 2737 * (immediate) data that might have already arrived. 2738 */ 2739 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2740 /* 2741 * This is the total length (sum of S/G lengths) this call 2742 * to cfiscsi_datamove() is supposed to handle, limited by 2743 * MaxBurstLength. 2744 */ 2745 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2746 cfiscsi_pdu_queue(response); 2747 } 2748 2749 static void 2750 cfiscsi_datamove(union ctl_io *io) 2751 { 2752 2753 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2754 cfiscsi_datamove_in(io); 2755 else { 2756 /* We hadn't received anything during this datamove yet. */ 2757 io->scsiio.ext_data_filled = 0; 2758 cfiscsi_datamove_out(io); 2759 } 2760 } 2761 2762 static void 2763 cfiscsi_scsi_command_done(union ctl_io *io) 2764 { 2765 struct icl_pdu *request, *response; 2766 struct iscsi_bhs_scsi_command *bhssc; 2767 struct iscsi_bhs_scsi_response *bhssr; 2768 #ifdef DIAGNOSTIC 2769 struct cfiscsi_data_wait *cdw; 2770 #endif 2771 struct cfiscsi_session *cs; 2772 uint16_t sense_length; 2773 2774 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2775 cs = PDU_SESSION(request); 2776 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2777 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2778 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2779 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2780 2781 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2782 // bhssc->bhssc_initiator_task_tag); 2783 2784 #ifdef DIAGNOSTIC 2785 CFISCSI_SESSION_LOCK(cs); 2786 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2787 KASSERT(bhssc->bhssc_initiator_task_tag != 2788 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2789 CFISCSI_SESSION_UNLOCK(cs); 2790 #endif 2791 2792 /* 2793 * Do not return status for aborted commands. 2794 * There are exceptions, but none supported by CTL yet. 2795 */ 2796 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2797 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2798 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2799 ctl_free_io(io); 2800 icl_pdu_free(request); 2801 return; 2802 } 2803 2804 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2805 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2806 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2807 bhssr->bhssr_flags = 0x80; 2808 /* 2809 * XXX: We don't deal with bidirectional under/overflows; 2810 * does anything actually support those? 2811 */ 2812 if (PDU_TOTAL_TRANSFER_LEN(request) < 2813 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2814 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2815 bhssr->bhssr_residual_count = 2816 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2817 PDU_TOTAL_TRANSFER_LEN(request)); 2818 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2819 // ntohl(bhssr->bhssr_residual_count)); 2820 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2821 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2822 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2823 bhssr->bhssr_residual_count = 2824 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2825 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2826 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2827 // ntohl(bhssr->bhssr_residual_count)); 2828 } 2829 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2830 bhssr->bhssr_status = io->scsiio.scsi_status; 2831 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2832 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2833 2834 if (io->scsiio.sense_len > 0) { 2835 #if 0 2836 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2837 io->scsiio.sense_len); 2838 #endif 2839 sense_length = htons(io->scsiio.sense_len); 2840 icl_pdu_append_data(response, 2841 &sense_length, sizeof(sense_length), M_WAITOK); 2842 icl_pdu_append_data(response, 2843 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2844 } 2845 2846 ctl_free_io(io); 2847 icl_pdu_free(request); 2848 cfiscsi_pdu_queue(response); 2849 } 2850 2851 static void 2852 cfiscsi_task_management_done(union ctl_io *io) 2853 { 2854 struct icl_pdu *request, *response; 2855 struct iscsi_bhs_task_management_request *bhstmr; 2856 struct iscsi_bhs_task_management_response *bhstmr2; 2857 struct cfiscsi_data_wait *cdw, *tmpcdw; 2858 struct cfiscsi_session *cs, *tcs; 2859 struct cfiscsi_softc *softc; 2860 int cold_reset = 0; 2861 2862 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2863 cs = PDU_SESSION(request); 2864 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2865 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2866 ISCSI_BHS_OPCODE_TASK_REQUEST, 2867 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2868 2869 #if 0 2870 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2871 bhstmr->bhstmr_initiator_task_tag, 2872 bhstmr->bhstmr_referenced_task_tag); 2873 #endif 2874 2875 if ((bhstmr->bhstmr_function & ~0x80) == 2876 BHSTMR_FUNCTION_ABORT_TASK) { 2877 /* 2878 * Make sure we no longer wait for Data-Out for this command. 2879 */ 2880 CFISCSI_SESSION_LOCK(cs); 2881 TAILQ_FOREACH_SAFE(cdw, 2882 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2883 if (bhstmr->bhstmr_referenced_task_tag != 2884 cdw->cdw_initiator_task_tag) 2885 continue; 2886 2887 #if 0 2888 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2889 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2890 #endif 2891 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2892 cdw, cdw_next); 2893 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2894 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2895 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2896 cfiscsi_data_wait_free(cs, cdw); 2897 } 2898 CFISCSI_SESSION_UNLOCK(cs); 2899 } 2900 if ((bhstmr->bhstmr_function & ~0x80) == 2901 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2902 io->io_hdr.status == CTL_SUCCESS) 2903 cold_reset = 1; 2904 2905 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2906 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2907 response->ip_bhs; 2908 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2909 bhstmr2->bhstmr_flags = 0x80; 2910 switch (io->taskio.task_status) { 2911 case CTL_TASK_FUNCTION_COMPLETE: 2912 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2913 break; 2914 case CTL_TASK_FUNCTION_SUCCEEDED: 2915 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2916 break; 2917 case CTL_TASK_LUN_DOES_NOT_EXIST: 2918 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2919 break; 2920 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2921 default: 2922 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2923 break; 2924 } 2925 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2926 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2927 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2928 2929 ctl_free_io(io); 2930 icl_pdu_free(request); 2931 cfiscsi_pdu_queue(response); 2932 2933 if (cold_reset) { 2934 softc = cs->cs_target->ct_softc; 2935 mtx_lock(&softc->lock); 2936 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2937 if (tcs->cs_target == cs->cs_target) 2938 cfiscsi_session_terminate(tcs); 2939 } 2940 mtx_unlock(&softc->lock); 2941 } 2942 } 2943 2944 static void 2945 cfiscsi_done(union ctl_io *io) 2946 { 2947 struct icl_pdu *request; 2948 struct cfiscsi_session *cs; 2949 2950 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2951 ("invalid CTL status %#x", io->io_hdr.status)); 2952 2953 if (io->io_hdr.io_type == CTL_IO_TASK && 2954 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2955 /* 2956 * Implicit task termination has just completed; nothing to do. 2957 */ 2958 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2959 cs->cs_tasks_aborted = true; 2960 refcount_release(&cs->cs_outstanding_ctl_pdus); 2961 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2962 ctl_free_io(io); 2963 return; 2964 } 2965 2966 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2967 cs = PDU_SESSION(request); 2968 2969 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2970 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2971 cfiscsi_scsi_command_done(io); 2972 break; 2973 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2974 cfiscsi_task_management_done(io); 2975 break; 2976 default: 2977 panic("cfiscsi_done called with wrong opcode 0x%x", 2978 request->ip_bhs->bhs_opcode); 2979 } 2980 2981 refcount_release(&cs->cs_outstanding_ctl_pdus); 2982 } 2983