1 /*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 /* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/param.h> 40 #include <sys/capsicum.h> 41 #include <sys/condvar.h> 42 #include <sys/file.h> 43 #include <sys/kernel.h> 44 #include <sys/kthread.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/module.h> 48 #include <sys/mutex.h> 49 #include <sys/queue.h> 50 #include <sys/sbuf.h> 51 #include <sys/sysctl.h> 52 #include <sys/systm.h> 53 #include <sys/uio.h> 54 #include <sys/unistd.h> 55 #include <vm/uma.h> 56 57 #include <cam/scsi/scsi_all.h> 58 #include <cam/scsi/scsi_da.h> 59 #include <cam/ctl/ctl_io.h> 60 #include <cam/ctl/ctl.h> 61 #include <cam/ctl/ctl_backend.h> 62 #include <cam/ctl/ctl_error.h> 63 #include <cam/ctl/ctl_frontend.h> 64 #include <cam/ctl/ctl_debug.h> 65 #include <cam/ctl/ctl_ha.h> 66 #include <cam/ctl/ctl_ioctl.h> 67 #include <cam/ctl/ctl_private.h> 68 69 #include <dev/iscsi/icl.h> 70 #include <dev/iscsi/icl_wrappers.h> 71 #include <dev/iscsi/iscsi_proto.h> 72 #include <cam/ctl/ctl_frontend_iscsi.h> 73 74 #ifdef ICL_KERNEL_PROXY 75 #include <sys/socketvar.h> 76 #endif 77 78 #ifdef ICL_KERNEL_PROXY 79 FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80 #endif 81 82 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83 static uma_zone_t cfiscsi_data_wait_zone; 84 85 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87 static int debug = 1; 88 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 89 &debug, 1, "Enable debug messages"); 90 static int ping_timeout = 5; 91 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 92 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 93 static int login_timeout = 60; 94 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 95 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 96 static int maxcmdsn_delta = 256; 97 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 98 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 99 "without confirmation"); 100 101 #define CFISCSI_DEBUG(X, ...) \ 102 do { \ 103 if (debug > 1) { \ 104 printf("%s: " X "\n", \ 105 __func__, ## __VA_ARGS__); \ 106 } \ 107 } while (0) 108 109 #define CFISCSI_WARN(X, ...) \ 110 do { \ 111 if (debug > 0) { \ 112 printf("WARNING: %s: " X "\n", \ 113 __func__, ## __VA_ARGS__); \ 114 } \ 115 } while (0) 116 117 #define CFISCSI_SESSION_DEBUG(S, X, ...) \ 118 do { \ 119 if (debug > 1) { \ 120 printf("%s: %s (%s): " X "\n", \ 121 __func__, S->cs_initiator_addr, \ 122 S->cs_initiator_name, ## __VA_ARGS__); \ 123 } \ 124 } while (0) 125 126 #define CFISCSI_SESSION_WARN(S, X, ...) \ 127 do { \ 128 if (debug > 0) { \ 129 printf("WARNING: %s (%s): " X "\n", \ 130 S->cs_initiator_addr, \ 131 S->cs_initiator_name, ## __VA_ARGS__); \ 132 } \ 133 } while (0) 134 135 #define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 136 #define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 137 #define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 138 139 #define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 140 #define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 141 #define PDU_EXPDATASN(X) (X)->ip_prv0 142 #define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 143 #define PDU_R2TSN(X) (X)->ip_prv2 144 145 int cfiscsi_init(void); 146 static void cfiscsi_online(void *arg); 147 static void cfiscsi_offline(void *arg); 148 static int cfiscsi_info(void *arg, struct sbuf *sb); 149 static int cfiscsi_lun_enable(void *arg, int lun_id); 150 static int cfiscsi_lun_disable(void *arg, int lun_id); 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 extern struct ctl_softc *control_softc; 180 181 static struct ctl_frontend cfiscsi_frontend = 182 { 183 .name = "iscsi", 184 .init = cfiscsi_init, 185 .ioctl = cfiscsi_ioctl, 186 }; 187 CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 188 MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 189 190 static struct icl_pdu * 191 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 192 { 193 194 return (icl_pdu_new(request->ip_conn, flags)); 195 } 196 197 static bool 198 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 199 { 200 const struct iscsi_bhs_scsi_command *bhssc; 201 struct cfiscsi_session *cs; 202 uint32_t cmdsn, expstatsn; 203 204 cs = PDU_SESSION(request); 205 206 /* 207 * Every incoming PDU - not just NOP-Out - resets the ping timer. 208 * The purpose of the timeout is to reset the connection when it stalls; 209 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 210 * in some queue. 211 * 212 * XXX: Locking? 213 */ 214 cs->cs_timeout = 0; 215 216 /* 217 * Data-Out PDUs don't contain CmdSN. 218 */ 219 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 220 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 221 return (false); 222 223 /* 224 * We're only using fields common for all the request 225 * (initiator -> target) PDUs. 226 */ 227 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 228 cmdsn = ntohl(bhssc->bhssc_cmdsn); 229 expstatsn = ntohl(bhssc->bhssc_expstatsn); 230 231 CFISCSI_SESSION_LOCK(cs); 232 #if 0 233 if (expstatsn != cs->cs_statsn) { 234 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 235 "while current StatSN is %d", expstatsn, 236 cs->cs_statsn); 237 } 238 #endif 239 240 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 241 /* 242 * The target MUST silently ignore any non-immediate command 243 * outside of this range. 244 */ 245 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 246 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 247 CFISCSI_SESSION_UNLOCK(cs); 248 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 249 "while expected %u", cmdsn, cs->cs_cmdsn); 250 return (true); 251 } 252 253 /* 254 * We don't support multiple connections now, so any 255 * discontinuity in CmdSN means lost PDUs. Since we don't 256 * support PDU retransmission -- terminate the connection. 257 */ 258 if (cmdsn != cs->cs_cmdsn) { 259 CFISCSI_SESSION_UNLOCK(cs); 260 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 261 "while expected %u; dropping connection", 262 cmdsn, cs->cs_cmdsn); 263 cfiscsi_session_terminate(cs); 264 return (true); 265 } 266 cs->cs_cmdsn++; 267 } 268 269 CFISCSI_SESSION_UNLOCK(cs); 270 271 return (false); 272 } 273 274 static void 275 cfiscsi_pdu_handle(struct icl_pdu *request) 276 { 277 struct cfiscsi_session *cs; 278 bool ignore; 279 280 cs = PDU_SESSION(request); 281 282 ignore = cfiscsi_pdu_update_cmdsn(request); 283 if (ignore) { 284 icl_pdu_free(request); 285 return; 286 } 287 288 /* 289 * Handle the PDU; this includes e.g. receiving the remaining 290 * part of PDU and submitting the SCSI command to CTL 291 * or queueing a reply. The handling routine is responsible 292 * for freeing the PDU when it's no longer needed. 293 */ 294 switch (request->ip_bhs->bhs_opcode & 295 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 296 case ISCSI_BHS_OPCODE_NOP_OUT: 297 cfiscsi_pdu_handle_nop_out(request); 298 break; 299 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 300 cfiscsi_pdu_handle_scsi_command(request); 301 break; 302 case ISCSI_BHS_OPCODE_TASK_REQUEST: 303 cfiscsi_pdu_handle_task_request(request); 304 break; 305 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 306 cfiscsi_pdu_handle_data_out(request); 307 break; 308 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 309 cfiscsi_pdu_handle_logout_request(request); 310 break; 311 default: 312 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 313 "opcode 0x%x; dropping connection", 314 request->ip_bhs->bhs_opcode); 315 icl_pdu_free(request); 316 cfiscsi_session_terminate(cs); 317 } 318 319 } 320 321 static void 322 cfiscsi_receive_callback(struct icl_pdu *request) 323 { 324 struct cfiscsi_session *cs; 325 326 cs = PDU_SESSION(request); 327 328 #ifdef ICL_KERNEL_PROXY 329 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 330 if (cs->cs_login_pdu == NULL) 331 cs->cs_login_pdu = request; 332 else 333 icl_pdu_free(request); 334 cv_signal(&cs->cs_login_cv); 335 return; 336 } 337 #endif 338 339 cfiscsi_pdu_handle(request); 340 } 341 342 static void 343 cfiscsi_error_callback(struct icl_conn *ic) 344 { 345 struct cfiscsi_session *cs; 346 347 cs = CONN_SESSION(ic); 348 349 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 350 cfiscsi_session_terminate(cs); 351 } 352 353 static int 354 cfiscsi_pdu_prepare(struct icl_pdu *response) 355 { 356 struct cfiscsi_session *cs; 357 struct iscsi_bhs_scsi_response *bhssr; 358 bool advance_statsn = true; 359 360 cs = PDU_SESSION(response); 361 362 CFISCSI_SESSION_LOCK_ASSERT(cs); 363 364 /* 365 * We're only using fields common for all the response 366 * (target -> initiator) PDUs. 367 */ 368 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 369 370 /* 371 * 10.8.3: "The StatSN for this connection is not advanced 372 * after this PDU is sent." 373 */ 374 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 375 advance_statsn = false; 376 377 /* 378 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 379 * StatSN for the connection is not advanced after this PDU is sent." 380 */ 381 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 382 bhssr->bhssr_initiator_task_tag == 0xffffffff) 383 advance_statsn = false; 384 385 /* 386 * See the comment below - StatSN is not meaningful and must 387 * not be advanced. 388 */ 389 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 390 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 391 advance_statsn = false; 392 393 /* 394 * 10.7.3: "The fields StatSN, Status, and Residual Count 395 * only have meaningful content if the S bit is set to 1." 396 */ 397 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 398 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 399 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 400 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 401 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 402 403 if (advance_statsn) 404 cs->cs_statsn++; 405 406 return (0); 407 } 408 409 static void 410 cfiscsi_pdu_queue(struct icl_pdu *response) 411 { 412 struct cfiscsi_session *cs; 413 414 cs = PDU_SESSION(response); 415 416 CFISCSI_SESSION_LOCK(cs); 417 cfiscsi_pdu_prepare(response); 418 icl_pdu_queue(response); 419 CFISCSI_SESSION_UNLOCK(cs); 420 } 421 422 static uint32_t 423 cfiscsi_decode_lun(uint64_t encoded) 424 { 425 uint8_t lun[8]; 426 uint32_t result; 427 428 /* 429 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 430 * but is in fact an evil, multidimensional structure defined 431 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 432 */ 433 memcpy(lun, &encoded, sizeof(lun)); 434 switch (lun[0] & 0xC0) { 435 case 0x00: 436 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 437 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 438 CFISCSI_WARN("malformed LUN " 439 "(peripheral device addressing method): 0x%jx", 440 (uintmax_t)encoded); 441 result = 0xffffffff; 442 break; 443 } 444 result = lun[1]; 445 break; 446 case 0x40: 447 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 448 lun[6] != 0 || lun[7] != 0) { 449 CFISCSI_WARN("malformed LUN " 450 "(flat address space addressing method): 0x%jx", 451 (uintmax_t)encoded); 452 result = 0xffffffff; 453 break; 454 } 455 result = ((lun[0] & 0x3f) << 8) + lun[1]; 456 break; 457 case 0xC0: 458 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 459 lun[6] != 0 || lun[7] != 0) { 460 CFISCSI_WARN("malformed LUN (extended flat " 461 "address space addressing method): 0x%jx", 462 (uintmax_t)encoded); 463 result = 0xffffffff; 464 break; 465 } 466 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 467 default: 468 CFISCSI_WARN("unsupported LUN format 0x%jx", 469 (uintmax_t)encoded); 470 result = 0xffffffff; 471 break; 472 } 473 474 return (result); 475 } 476 477 static void 478 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 479 { 480 struct cfiscsi_session *cs; 481 struct iscsi_bhs_nop_out *bhsno; 482 struct iscsi_bhs_nop_in *bhsni; 483 struct icl_pdu *response; 484 void *data = NULL; 485 size_t datasize; 486 int error; 487 488 cs = PDU_SESSION(request); 489 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 490 491 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 492 /* 493 * Nothing to do, iscsi_pdu_update_statsn() already 494 * zeroed the timeout. 495 */ 496 icl_pdu_free(request); 497 return; 498 } 499 500 datasize = icl_pdu_data_segment_length(request); 501 if (datasize > 0) { 502 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 503 if (data == NULL) { 504 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 505 "dropping connection"); 506 icl_pdu_free(request); 507 cfiscsi_session_terminate(cs); 508 return; 509 } 510 icl_pdu_get_data(request, 0, data, datasize); 511 } 512 513 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 514 if (response == NULL) { 515 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 516 "droppping connection"); 517 free(data, M_CFISCSI); 518 icl_pdu_free(request); 519 cfiscsi_session_terminate(cs); 520 return; 521 } 522 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 523 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 524 bhsni->bhsni_flags = 0x80; 525 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 526 bhsni->bhsni_target_transfer_tag = 0xffffffff; 527 if (datasize > 0) { 528 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 529 if (error != 0) { 530 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 531 "dropping connection"); 532 free(data, M_CFISCSI); 533 icl_pdu_free(request); 534 icl_pdu_free(response); 535 cfiscsi_session_terminate(cs); 536 return; 537 } 538 free(data, M_CFISCSI); 539 } 540 541 icl_pdu_free(request); 542 cfiscsi_pdu_queue(response); 543 } 544 545 static void 546 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 547 { 548 struct iscsi_bhs_scsi_command *bhssc; 549 struct cfiscsi_session *cs; 550 union ctl_io *io; 551 int error; 552 553 cs = PDU_SESSION(request); 554 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 555 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 556 // bhssc->bhssc_initiator_task_tag); 557 558 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 559 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 560 "ImmediateData=No; dropping connection"); 561 icl_pdu_free(request); 562 cfiscsi_session_terminate(cs); 563 return; 564 } 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_SCSI; 569 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 570 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 571 io->io_hdr.nexus.targ_target.id = 0; 572 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 573 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 574 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 575 case BHSSC_FLAGS_ATTR_UNTAGGED: 576 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 577 break; 578 case BHSSC_FLAGS_ATTR_SIMPLE: 579 io->scsiio.tag_type = CTL_TAG_SIMPLE; 580 break; 581 case BHSSC_FLAGS_ATTR_ORDERED: 582 io->scsiio.tag_type = CTL_TAG_ORDERED; 583 break; 584 case BHSSC_FLAGS_ATTR_HOQ: 585 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 586 break; 587 case BHSSC_FLAGS_ATTR_ACA: 588 io->scsiio.tag_type = CTL_TAG_ACA; 589 break; 590 default: 591 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 592 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 593 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 594 break; 595 } 596 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 597 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 598 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 599 error = ctl_queue(io); 600 if (error != CTL_RETVAL_COMPLETE) { 601 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 602 "dropping connection", error); 603 ctl_free_io(io); 604 refcount_release(&cs->cs_outstanding_ctl_pdus); 605 icl_pdu_free(request); 606 cfiscsi_session_terminate(cs); 607 } 608 } 609 610 static void 611 cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 612 { 613 struct iscsi_bhs_task_management_request *bhstmr; 614 struct iscsi_bhs_task_management_response *bhstmr2; 615 struct icl_pdu *response; 616 struct cfiscsi_session *cs; 617 union ctl_io *io; 618 int error; 619 620 cs = PDU_SESSION(request); 621 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 622 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 623 ctl_zero_io(io); 624 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 625 io->io_hdr.io_type = CTL_IO_TASK; 626 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 627 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 628 io->io_hdr.nexus.targ_target.id = 0; 629 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 630 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 631 632 switch (bhstmr->bhstmr_function & ~0x80) { 633 case BHSTMR_FUNCTION_ABORT_TASK: 634 #if 0 635 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 636 #endif 637 io->taskio.task_action = CTL_TASK_ABORT_TASK; 638 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 639 break; 640 case BHSTMR_FUNCTION_ABORT_TASK_SET: 641 #if 0 642 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 643 #endif 644 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 645 break; 646 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 647 #if 0 648 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 649 #endif 650 io->taskio.task_action = CTL_TASK_LUN_RESET; 651 break; 652 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 653 #if 0 654 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 655 #endif 656 io->taskio.task_action = CTL_TASK_TARGET_RESET; 657 break; 658 default: 659 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 660 bhstmr->bhstmr_function & ~0x80); 661 ctl_free_io(io); 662 663 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 664 if (response == NULL) { 665 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 666 "dropping connection"); 667 icl_pdu_free(request); 668 cfiscsi_session_terminate(cs); 669 return; 670 } 671 bhstmr2 = (struct iscsi_bhs_task_management_response *) 672 response->ip_bhs; 673 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 674 bhstmr2->bhstmr_flags = 0x80; 675 bhstmr2->bhstmr_response = 676 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 677 bhstmr2->bhstmr_initiator_task_tag = 678 bhstmr->bhstmr_initiator_task_tag; 679 icl_pdu_free(request); 680 cfiscsi_pdu_queue(response); 681 return; 682 } 683 684 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 685 error = ctl_queue(io); 686 if (error != CTL_RETVAL_COMPLETE) { 687 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 688 "dropping connection", error); 689 ctl_free_io(io); 690 refcount_release(&cs->cs_outstanding_ctl_pdus); 691 icl_pdu_free(request); 692 cfiscsi_session_terminate(cs); 693 } 694 } 695 696 static bool 697 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 698 { 699 struct iscsi_bhs_data_out *bhsdo; 700 struct cfiscsi_session *cs; 701 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 702 size_t copy_len, len, off, buffer_offset; 703 int ctl_sg_count; 704 union ctl_io *io; 705 706 cs = PDU_SESSION(request); 707 708 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 709 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 710 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 711 ISCSI_BHS_OPCODE_SCSI_COMMAND, 712 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 713 714 /* 715 * We're only using fields common for Data-Out and SCSI Command PDUs. 716 */ 717 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 718 719 io = cdw->cdw_ctl_io; 720 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 721 ("CTL_FLAG_DATA_IN")); 722 723 #if 0 724 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 725 request->ip_data_len, io->scsiio.kern_total_len); 726 #endif 727 728 if (io->scsiio.kern_sg_entries > 0) { 729 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 730 ctl_sg_count = io->scsiio.kern_sg_entries; 731 } else { 732 ctl_sglist = &ctl_sg_entry; 733 ctl_sglist->addr = io->scsiio.kern_data_ptr; 734 ctl_sglist->len = io->scsiio.kern_data_len; 735 ctl_sg_count = 1; 736 } 737 738 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 739 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 740 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 741 else 742 buffer_offset = 0; 743 len = icl_pdu_data_segment_length(request); 744 745 /* 746 * Make sure the offset, as sent by the initiator, matches the offset 747 * we're supposed to be at in the scatter-gather list. 748 */ 749 if (buffer_offset > 750 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 751 buffer_offset + len <= 752 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 753 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 754 "expected %zd; dropping connection", buffer_offset, 755 (size_t)io->scsiio.kern_rel_offset + 756 (size_t)io->scsiio.ext_data_filled); 757 ctl_set_data_phase_error(&io->scsiio); 758 cfiscsi_session_terminate(cs); 759 return (true); 760 } 761 762 /* 763 * This is the offset within the PDU data segment, as opposed 764 * to buffer_offset, which is the offset within the task (SCSI 765 * command). 766 */ 767 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 768 buffer_offset; 769 770 /* 771 * Iterate over the scatter/gather segments, filling them with data 772 * from the PDU data segment. Note that this can get called multiple 773 * times for one SCSI command; the cdw structure holds state for the 774 * scatter/gather list. 775 */ 776 for (;;) { 777 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 778 ("cdw->cdw_sg_index >= ctl_sg_count")); 779 if (cdw->cdw_sg_len == 0) { 780 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 781 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 782 } 783 KASSERT(off <= len, ("len > off")); 784 copy_len = len - off; 785 if (copy_len > cdw->cdw_sg_len) 786 copy_len = cdw->cdw_sg_len; 787 788 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 789 cdw->cdw_sg_addr += copy_len; 790 cdw->cdw_sg_len -= copy_len; 791 off += copy_len; 792 io->scsiio.ext_data_filled += copy_len; 793 794 if (cdw->cdw_sg_len == 0) { 795 /* 796 * End of current segment. 797 */ 798 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 799 /* 800 * Last segment in scatter/gather list. 801 */ 802 break; 803 } 804 cdw->cdw_sg_index++; 805 } 806 807 if (off == len) { 808 /* 809 * End of PDU payload. 810 */ 811 break; 812 } 813 } 814 815 if (len > off) { 816 /* 817 * In case of unsolicited data, it's possible that the buffer 818 * provided by CTL is smaller than negotiated FirstBurstLength. 819 * Just ignore the superfluous data; will ask for them with R2T 820 * on next call to cfiscsi_datamove(). 821 * 822 * This obviously can only happen with SCSI Command PDU. 823 */ 824 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 825 ISCSI_BHS_OPCODE_SCSI_COMMAND) 826 return (true); 827 828 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 829 "expected %zd; dropping connection", 830 icl_pdu_data_segment_length(request), off); 831 ctl_set_data_phase_error(&io->scsiio); 832 cfiscsi_session_terminate(cs); 833 return (true); 834 } 835 836 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 837 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 838 CFISCSI_SESSION_WARN(cs, "got the final packet without " 839 "the F flag; flags = 0x%x; dropping connection", 840 bhsdo->bhsdo_flags); 841 ctl_set_data_phase_error(&io->scsiio); 842 cfiscsi_session_terminate(cs); 843 return (true); 844 } 845 846 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 847 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 848 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 849 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 850 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 851 "transmitted size was %zd bytes instead of %d; " 852 "dropping connection", 853 (size_t)io->scsiio.ext_data_filled, 854 cdw->cdw_r2t_end); 855 ctl_set_data_phase_error(&io->scsiio); 856 cfiscsi_session_terminate(cs); 857 return (true); 858 } else { 859 /* 860 * For SCSI Command PDU, this just means we need to 861 * solicit more data by sending R2T. 862 */ 863 return (false); 864 } 865 } 866 867 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 868 #if 0 869 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 870 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 871 #endif 872 873 return (true); 874 } 875 876 return (false); 877 } 878 879 static void 880 cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 881 { 882 struct iscsi_bhs_data_out *bhsdo; 883 struct cfiscsi_session *cs; 884 struct cfiscsi_data_wait *cdw = NULL; 885 union ctl_io *io; 886 bool done; 887 888 cs = PDU_SESSION(request); 889 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 890 891 CFISCSI_SESSION_LOCK(cs); 892 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 893 #if 0 894 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 895 "ttt 0x%x, itt 0x%x", 896 bhsdo->bhsdo_target_transfer_tag, 897 bhsdo->bhsdo_initiator_task_tag, 898 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 899 #endif 900 if (bhsdo->bhsdo_target_transfer_tag == 901 cdw->cdw_target_transfer_tag) 902 break; 903 } 904 CFISCSI_SESSION_UNLOCK(cs); 905 if (cdw == NULL) { 906 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 907 "0x%x, not found; dropping connection", 908 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 909 icl_pdu_free(request); 910 cfiscsi_session_terminate(cs); 911 return; 912 } 913 914 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 915 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 916 "DataSN %u, while expected %u; dropping connection", 917 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 918 icl_pdu_free(request); 919 cfiscsi_session_terminate(cs); 920 return; 921 } 922 cdw->cdw_datasn++; 923 924 io = cdw->cdw_ctl_io; 925 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 926 ("CTL_FLAG_DATA_IN")); 927 928 done = cfiscsi_handle_data_segment(request, cdw); 929 if (done) { 930 CFISCSI_SESSION_LOCK(cs); 931 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 932 CFISCSI_SESSION_UNLOCK(cs); 933 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 934 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 935 cfiscsi_data_wait_free(cs, cdw); 936 if (done) 937 io->scsiio.be_move_done(io); 938 else 939 cfiscsi_datamove_out(io); 940 } 941 942 icl_pdu_free(request); 943 } 944 945 static void 946 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 947 { 948 struct iscsi_bhs_logout_request *bhslr; 949 struct iscsi_bhs_logout_response *bhslr2; 950 struct icl_pdu *response; 951 struct cfiscsi_session *cs; 952 953 cs = PDU_SESSION(request); 954 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 955 switch (bhslr->bhslr_reason & 0x7f) { 956 case BHSLR_REASON_CLOSE_SESSION: 957 case BHSLR_REASON_CLOSE_CONNECTION: 958 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 959 if (response == NULL) { 960 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 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_CLOSED_SUCCESSFULLY; 969 bhslr2->bhslr_initiator_task_tag = 970 bhslr->bhslr_initiator_task_tag; 971 icl_pdu_free(request); 972 cfiscsi_pdu_queue(response); 973 cfiscsi_session_terminate(cs); 974 break; 975 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 976 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 977 if (response == NULL) { 978 CFISCSI_SESSION_WARN(cs, 979 "failed to allocate memory; dropping connection"); 980 icl_pdu_free(request); 981 cfiscsi_session_terminate(cs); 982 return; 983 } 984 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 985 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 986 bhslr2->bhslr_flags = 0x80; 987 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 988 bhslr2->bhslr_initiator_task_tag = 989 bhslr->bhslr_initiator_task_tag; 990 icl_pdu_free(request); 991 cfiscsi_pdu_queue(response); 992 break; 993 default: 994 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 995 bhslr->bhslr_reason); 996 icl_pdu_free(request); 997 cfiscsi_session_terminate(cs); 998 break; 999 } 1000 } 1001 1002 static void 1003 cfiscsi_callout(void *context) 1004 { 1005 struct icl_pdu *cp; 1006 struct iscsi_bhs_nop_in *bhsni; 1007 struct cfiscsi_session *cs; 1008 1009 cs = context; 1010 1011 if (cs->cs_terminating) 1012 return; 1013 1014 callout_schedule(&cs->cs_callout, 1 * hz); 1015 1016 atomic_add_int(&cs->cs_timeout, 1); 1017 1018 #ifdef ICL_KERNEL_PROXY 1019 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1020 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1021 CFISCSI_SESSION_WARN(cs, "login timed out after " 1022 "%d seconds; dropping connection", cs->cs_timeout); 1023 cfiscsi_session_terminate(cs); 1024 } 1025 return; 1026 } 1027 #endif 1028 1029 if (ping_timeout <= 0) { 1030 /* 1031 * Pings are disabled. Don't send NOP-In in this case; 1032 * user might have disabled pings to work around problems 1033 * with certain initiators that can't properly handle 1034 * NOP-In, such as iPXE. Reset the timeout, to avoid 1035 * triggering reconnection, should the user decide to 1036 * reenable them. 1037 */ 1038 cs->cs_timeout = 0; 1039 return; 1040 } 1041 1042 if (cs->cs_timeout >= ping_timeout) { 1043 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1044 "dropping connection", ping_timeout); 1045 cfiscsi_session_terminate(cs); 1046 return; 1047 } 1048 1049 /* 1050 * If the ping was reset less than one second ago - which means 1051 * that we've received some PDU during the last second - assume 1052 * the traffic flows correctly and don't bother sending a NOP-Out. 1053 * 1054 * (It's 2 - one for one second, and one for incrementing is_timeout 1055 * earlier in this routine.) 1056 */ 1057 if (cs->cs_timeout < 2) 1058 return; 1059 1060 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1061 if (cp == NULL) { 1062 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1063 return; 1064 } 1065 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1066 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1067 bhsni->bhsni_flags = 0x80; 1068 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1069 1070 cfiscsi_pdu_queue(cp); 1071 } 1072 1073 static struct cfiscsi_data_wait * 1074 cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1075 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1076 { 1077 struct cfiscsi_data_wait *cdw; 1078 int error; 1079 1080 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1081 if (cdw == NULL) { 1082 CFISCSI_SESSION_WARN(cs, 1083 "failed to allocate %zd bytes", sizeof(*cdw)); 1084 return (NULL); 1085 } 1086 1087 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1088 &cdw->cdw_icl_prv); 1089 if (error != 0) { 1090 CFISCSI_SESSION_WARN(cs, 1091 "icl_conn_transfer_setup() failed with error %d", error); 1092 uma_zfree(cfiscsi_data_wait_zone, cdw); 1093 return (NULL); 1094 } 1095 1096 cdw->cdw_ctl_io = io; 1097 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1098 cdw->cdw_initiator_task_tag = initiator_task_tag; 1099 1100 return (cdw); 1101 } 1102 1103 static void 1104 cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1105 struct cfiscsi_data_wait *cdw) 1106 { 1107 1108 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1109 uma_zfree(cfiscsi_data_wait_zone, cdw); 1110 } 1111 1112 static void 1113 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1114 { 1115 struct cfiscsi_data_wait *cdw; 1116 union ctl_io *io; 1117 int error, last, wait; 1118 1119 if (cs->cs_target == NULL) 1120 return; /* No target yet, so nothing to do. */ 1121 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1122 ctl_zero_io(io); 1123 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1124 io->io_hdr.io_type = CTL_IO_TASK; 1125 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1126 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1127 io->io_hdr.nexus.targ_target.id = 0; 1128 io->io_hdr.nexus.targ_lun = 0; 1129 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1130 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1131 wait = cs->cs_outstanding_ctl_pdus; 1132 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1133 error = ctl_queue(io); 1134 if (error != CTL_RETVAL_COMPLETE) { 1135 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1136 refcount_release(&cs->cs_outstanding_ctl_pdus); 1137 ctl_free_io(io); 1138 } 1139 1140 CFISCSI_SESSION_LOCK(cs); 1141 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1142 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1143 CFISCSI_SESSION_UNLOCK(cs); 1144 /* 1145 * Set nonzero port status; this prevents backends from 1146 * assuming that the data transfer actually succeeded 1147 * and writing uninitialized data to disk. 1148 */ 1149 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1150 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1151 cfiscsi_data_wait_free(cs, cdw); 1152 CFISCSI_SESSION_LOCK(cs); 1153 } 1154 CFISCSI_SESSION_UNLOCK(cs); 1155 1156 /* 1157 * Wait for CTL to terminate all the tasks. 1158 */ 1159 if (wait > 0) 1160 CFISCSI_SESSION_WARN(cs, 1161 "waiting for CTL to terminate %d tasks", wait); 1162 for (;;) { 1163 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1164 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1165 if (last != 0) 1166 break; 1167 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1168 0, "cfiscsi_terminate", hz / 100); 1169 } 1170 if (wait > 0) 1171 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1172 } 1173 1174 static void 1175 cfiscsi_maintenance_thread(void *arg) 1176 { 1177 struct cfiscsi_session *cs; 1178 1179 cs = arg; 1180 1181 for (;;) { 1182 CFISCSI_SESSION_LOCK(cs); 1183 if (cs->cs_terminating == false) 1184 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1185 CFISCSI_SESSION_UNLOCK(cs); 1186 1187 if (cs->cs_terminating) { 1188 1189 /* 1190 * We used to wait up to 30 seconds to deliver queued 1191 * PDUs to the initiator. We also tried hard to deliver 1192 * SCSI Responses for the aborted PDUs. We don't do 1193 * that anymore. We might need to revisit that. 1194 */ 1195 callout_drain(&cs->cs_callout); 1196 icl_conn_close(cs->cs_conn); 1197 1198 /* 1199 * At this point ICL receive thread is no longer 1200 * running; no new tasks can be queued. 1201 */ 1202 cfiscsi_session_terminate_tasks(cs); 1203 cfiscsi_session_delete(cs); 1204 kthread_exit(); 1205 return; 1206 } 1207 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1208 } 1209 } 1210 1211 static void 1212 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1213 { 1214 1215 if (cs->cs_terminating) 1216 return; 1217 cs->cs_terminating = true; 1218 cv_signal(&cs->cs_maintenance_cv); 1219 #ifdef ICL_KERNEL_PROXY 1220 cv_signal(&cs->cs_login_cv); 1221 #endif 1222 } 1223 1224 static int 1225 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1226 { 1227 struct cfiscsi_target *ct; 1228 char *name; 1229 int i; 1230 1231 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1232 1233 ct = cs->cs_target; 1234 name = strdup(cs->cs_initiator_id, M_CTL); 1235 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1236 if (i < 0) { 1237 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1238 i); 1239 cs->cs_ctl_initid = -1; 1240 return (1); 1241 } 1242 cs->cs_ctl_initid = i; 1243 #if 0 1244 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1245 #endif 1246 1247 return (0); 1248 } 1249 1250 static void 1251 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1252 { 1253 int error; 1254 1255 if (cs->cs_ctl_initid == -1) 1256 return; 1257 1258 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1259 if (error != 0) { 1260 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1261 error); 1262 } 1263 cs->cs_ctl_initid = -1; 1264 } 1265 1266 static struct cfiscsi_session * 1267 cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1268 { 1269 struct cfiscsi_session *cs; 1270 int error; 1271 1272 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1273 if (cs == NULL) { 1274 CFISCSI_WARN("malloc failed"); 1275 return (NULL); 1276 } 1277 cs->cs_ctl_initid = -1; 1278 1279 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1280 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1281 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1282 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1283 #ifdef ICL_KERNEL_PROXY 1284 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1285 #endif 1286 1287 cs->cs_conn = icl_new_conn(offload, "cfiscsi", &cs->cs_lock); 1288 if (cs->cs_conn == NULL) { 1289 free(cs, M_CFISCSI); 1290 return (NULL); 1291 } 1292 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1293 cs->cs_conn->ic_error = cfiscsi_error_callback; 1294 cs->cs_conn->ic_prv0 = cs; 1295 1296 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1297 if (error != 0) { 1298 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1299 free(cs, M_CFISCSI); 1300 return (NULL); 1301 } 1302 1303 mtx_lock(&softc->lock); 1304 cs->cs_id = ++softc->last_session_id; 1305 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1306 mtx_unlock(&softc->lock); 1307 1308 /* 1309 * Start pinging the initiator. 1310 */ 1311 callout_init(&cs->cs_callout, 1); 1312 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1313 1314 return (cs); 1315 } 1316 1317 static void 1318 cfiscsi_session_delete(struct cfiscsi_session *cs) 1319 { 1320 struct cfiscsi_softc *softc; 1321 1322 softc = &cfiscsi_softc; 1323 1324 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1325 ("destroying session with outstanding CTL pdus")); 1326 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1327 ("destroying session with non-empty queue")); 1328 1329 cfiscsi_session_unregister_initiator(cs); 1330 if (cs->cs_target != NULL) 1331 cfiscsi_target_release(cs->cs_target); 1332 icl_conn_close(cs->cs_conn); 1333 icl_conn_free(cs->cs_conn); 1334 1335 mtx_lock(&softc->lock); 1336 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1337 cv_signal(&softc->sessions_cv); 1338 mtx_unlock(&softc->lock); 1339 1340 free(cs, M_CFISCSI); 1341 } 1342 1343 int 1344 cfiscsi_init(void) 1345 { 1346 struct cfiscsi_softc *softc; 1347 int retval; 1348 1349 softc = &cfiscsi_softc; 1350 retval = 0; 1351 bzero(softc, sizeof(*softc)); 1352 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1353 1354 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1355 #ifdef ICL_KERNEL_PROXY 1356 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1357 #endif 1358 TAILQ_INIT(&softc->sessions); 1359 TAILQ_INIT(&softc->targets); 1360 1361 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1362 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1363 UMA_ALIGN_PTR, 0); 1364 1365 return (0); 1366 } 1367 1368 #ifdef ICL_KERNEL_PROXY 1369 static void 1370 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1371 { 1372 struct cfiscsi_session *cs; 1373 1374 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1375 if (cs == NULL) { 1376 CFISCSI_WARN("failed to create session"); 1377 return; 1378 } 1379 1380 icl_conn_handoff_sock(cs->cs_conn, so); 1381 cs->cs_initiator_sa = sa; 1382 cs->cs_portal_id = portal_id; 1383 cs->cs_waiting_for_ctld = true; 1384 cv_signal(&cfiscsi_softc.accept_cv); 1385 } 1386 #endif 1387 1388 static void 1389 cfiscsi_online(void *arg) 1390 { 1391 struct cfiscsi_softc *softc; 1392 struct cfiscsi_target *ct; 1393 int online; 1394 1395 ct = (struct cfiscsi_target *)arg; 1396 softc = ct->ct_softc; 1397 1398 mtx_lock(&softc->lock); 1399 if (ct->ct_online) { 1400 mtx_unlock(&softc->lock); 1401 return; 1402 } 1403 ct->ct_online = 1; 1404 online = softc->online++; 1405 mtx_unlock(&softc->lock); 1406 if (online > 0) 1407 return; 1408 1409 #ifdef ICL_KERNEL_PROXY 1410 if (softc->listener != NULL) 1411 icl_listen_free(softc->listener); 1412 softc->listener = icl_listen_new(cfiscsi_accept); 1413 #endif 1414 } 1415 1416 static void 1417 cfiscsi_offline(void *arg) 1418 { 1419 struct cfiscsi_softc *softc; 1420 struct cfiscsi_target *ct; 1421 struct cfiscsi_session *cs; 1422 int online; 1423 1424 ct = (struct cfiscsi_target *)arg; 1425 softc = ct->ct_softc; 1426 1427 mtx_lock(&softc->lock); 1428 if (!ct->ct_online) { 1429 mtx_unlock(&softc->lock); 1430 return; 1431 } 1432 ct->ct_online = 0; 1433 online = --softc->online; 1434 1435 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1436 if (cs->cs_target == ct) 1437 cfiscsi_session_terminate(cs); 1438 } 1439 do { 1440 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1441 if (cs->cs_target == ct) 1442 break; 1443 } 1444 if (cs != NULL) 1445 cv_wait(&softc->sessions_cv, &softc->lock); 1446 } while (cs != NULL && ct->ct_online == 0); 1447 mtx_unlock(&softc->lock); 1448 if (online > 0) 1449 return; 1450 1451 #ifdef ICL_KERNEL_PROXY 1452 icl_listen_free(softc->listener); 1453 softc->listener = NULL; 1454 #endif 1455 } 1456 1457 static int 1458 cfiscsi_info(void *arg, struct sbuf *sb) 1459 { 1460 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1461 int retval; 1462 1463 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1464 ct->ct_state); 1465 return (retval); 1466 } 1467 1468 static void 1469 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1470 { 1471 struct cfiscsi_softc *softc; 1472 struct cfiscsi_session *cs, *cs2; 1473 struct cfiscsi_target *ct; 1474 struct ctl_iscsi_handoff_params *cihp; 1475 int error; 1476 1477 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1478 softc = &cfiscsi_softc; 1479 1480 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1481 cihp->initiator_name, cihp->initiator_addr, 1482 cihp->target_name); 1483 1484 ct = cfiscsi_target_find(softc, cihp->target_name, 1485 cihp->portal_group_tag); 1486 if (ct == NULL) { 1487 ci->status = CTL_ISCSI_ERROR; 1488 snprintf(ci->error_str, sizeof(ci->error_str), 1489 "%s: target not found", __func__); 1490 return; 1491 } 1492 1493 #ifdef ICL_KERNEL_PROXY 1494 if (cihp->socket > 0 && cihp->connection_id > 0) { 1495 snprintf(ci->error_str, sizeof(ci->error_str), 1496 "both socket and connection_id set"); 1497 ci->status = CTL_ISCSI_ERROR; 1498 cfiscsi_target_release(ct); 1499 return; 1500 } 1501 if (cihp->socket == 0) { 1502 mtx_lock(&cfiscsi_softc.lock); 1503 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1504 if (cs->cs_id == cihp->connection_id) 1505 break; 1506 } 1507 if (cs == NULL) { 1508 mtx_unlock(&cfiscsi_softc.lock); 1509 snprintf(ci->error_str, sizeof(ci->error_str), 1510 "connection not found"); 1511 ci->status = CTL_ISCSI_ERROR; 1512 cfiscsi_target_release(ct); 1513 return; 1514 } 1515 mtx_unlock(&cfiscsi_softc.lock); 1516 } else { 1517 #endif 1518 cs = cfiscsi_session_new(softc, cihp->offload); 1519 if (cs == NULL) { 1520 ci->status = CTL_ISCSI_ERROR; 1521 snprintf(ci->error_str, sizeof(ci->error_str), 1522 "%s: cfiscsi_session_new failed", __func__); 1523 cfiscsi_target_release(ct); 1524 return; 1525 } 1526 #ifdef ICL_KERNEL_PROXY 1527 } 1528 #endif 1529 1530 /* 1531 * First PDU of Full Feature phase has the same CmdSN as the last 1532 * PDU from the Login Phase received from the initiator. Thus, 1533 * the -1 below. 1534 */ 1535 cs->cs_cmdsn = cihp->cmdsn; 1536 cs->cs_statsn = cihp->statsn; 1537 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1538 cs->cs_max_burst_length = cihp->max_burst_length; 1539 cs->cs_immediate_data = !!cihp->immediate_data; 1540 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1541 cs->cs_conn->ic_header_crc32c = true; 1542 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1543 cs->cs_conn->ic_data_crc32c = true; 1544 1545 strlcpy(cs->cs_initiator_name, 1546 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1547 strlcpy(cs->cs_initiator_addr, 1548 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1549 strlcpy(cs->cs_initiator_alias, 1550 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1551 memcpy(cs->cs_initiator_isid, 1552 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1553 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1554 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1555 cihp->initiator_isid[0], cihp->initiator_isid[1], 1556 cihp->initiator_isid[2], cihp->initiator_isid[3], 1557 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1558 1559 mtx_lock(&softc->lock); 1560 if (ct->ct_online == 0) { 1561 mtx_unlock(&softc->lock); 1562 cfiscsi_session_terminate(cs); 1563 cfiscsi_target_release(ct); 1564 ci->status = CTL_ISCSI_ERROR; 1565 snprintf(ci->error_str, sizeof(ci->error_str), 1566 "%s: port offline", __func__); 1567 return; 1568 } 1569 cs->cs_target = ct; 1570 mtx_unlock(&softc->lock); 1571 1572 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1573 restart: 1574 if (!cs->cs_terminating) { 1575 mtx_lock(&softc->lock); 1576 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1577 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1578 cs->cs_target == cs2->cs_target && 1579 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1580 cfiscsi_session_terminate(cs2); 1581 mtx_unlock(&softc->lock); 1582 pause("cfiscsi_reinstate", 1); 1583 goto restart; 1584 } 1585 } 1586 mtx_unlock(&softc->lock); 1587 } 1588 1589 /* 1590 * Register initiator with CTL. 1591 */ 1592 cfiscsi_session_register_initiator(cs); 1593 1594 #ifdef ICL_KERNEL_PROXY 1595 if (cihp->socket > 0) { 1596 #endif 1597 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1598 if (error != 0) { 1599 cfiscsi_session_terminate(cs); 1600 refcount_release(&cs->cs_outstanding_ctl_pdus); 1601 ci->status = CTL_ISCSI_ERROR; 1602 snprintf(ci->error_str, sizeof(ci->error_str), 1603 "%s: icl_conn_handoff failed with error %d", 1604 __func__, error); 1605 return; 1606 } 1607 #ifdef ICL_KERNEL_PROXY 1608 } 1609 #endif 1610 1611 #ifdef ICL_KERNEL_PROXY 1612 cs->cs_login_phase = false; 1613 1614 /* 1615 * First PDU of the Full Feature phase has likely already arrived. 1616 * We have to pick it up and execute properly. 1617 */ 1618 if (cs->cs_login_pdu != NULL) { 1619 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1620 cfiscsi_pdu_handle(cs->cs_login_pdu); 1621 cs->cs_login_pdu = NULL; 1622 } 1623 #endif 1624 1625 refcount_release(&cs->cs_outstanding_ctl_pdus); 1626 ci->status = CTL_ISCSI_OK; 1627 } 1628 1629 static void 1630 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1631 { 1632 struct ctl_iscsi_list_params *cilp; 1633 struct cfiscsi_session *cs; 1634 struct cfiscsi_softc *softc; 1635 struct sbuf *sb; 1636 int error; 1637 1638 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1639 softc = &cfiscsi_softc; 1640 1641 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1642 if (sb == NULL) { 1643 ci->status = CTL_ISCSI_ERROR; 1644 snprintf(ci->error_str, sizeof(ci->error_str), 1645 "Unable to allocate %d bytes for iSCSI session list", 1646 cilp->alloc_len); 1647 return; 1648 } 1649 1650 sbuf_printf(sb, "<ctlislist>\n"); 1651 mtx_lock(&softc->lock); 1652 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1653 #ifdef ICL_KERNEL_PROXY 1654 if (cs->cs_target == NULL) 1655 continue; 1656 #endif 1657 error = sbuf_printf(sb, "<connection id=\"%d\">" 1658 "<initiator>%s</initiator>" 1659 "<initiator_addr>%s</initiator_addr>" 1660 "<initiator_alias>%s</initiator_alias>" 1661 "<target>%s</target>" 1662 "<target_alias>%s</target_alias>" 1663 "<target_portal_group_tag>%u</target_portal_group_tag>" 1664 "<header_digest>%s</header_digest>" 1665 "<data_digest>%s</data_digest>" 1666 "<max_data_segment_length>%zd</max_data_segment_length>" 1667 "<immediate_data>%d</immediate_data>" 1668 "<iser>%d</iser>" 1669 "<offload>%s</offload>" 1670 "</connection>\n", 1671 cs->cs_id, 1672 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1673 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1674 cs->cs_target->ct_tag, 1675 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1676 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1677 cs->cs_max_data_segment_length, 1678 cs->cs_immediate_data, 1679 cs->cs_conn->ic_iser, 1680 cs->cs_conn->ic_offload); 1681 if (error != 0) 1682 break; 1683 } 1684 mtx_unlock(&softc->lock); 1685 error = sbuf_printf(sb, "</ctlislist>\n"); 1686 if (error != 0) { 1687 sbuf_delete(sb); 1688 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1689 snprintf(ci->error_str, sizeof(ci->error_str), 1690 "Out of space, %d bytes is too small", cilp->alloc_len); 1691 return; 1692 } 1693 sbuf_finish(sb); 1694 1695 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1696 cilp->fill_len = sbuf_len(sb) + 1; 1697 ci->status = CTL_ISCSI_OK; 1698 sbuf_delete(sb); 1699 } 1700 1701 static void 1702 cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1703 { 1704 struct icl_pdu *response; 1705 struct iscsi_bhs_asynchronous_message *bhsam; 1706 struct ctl_iscsi_logout_params *cilp; 1707 struct cfiscsi_session *cs; 1708 struct cfiscsi_softc *softc; 1709 int found = 0; 1710 1711 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1712 softc = &cfiscsi_softc; 1713 1714 mtx_lock(&softc->lock); 1715 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1716 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1717 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1718 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1719 continue; 1720 1721 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1722 if (response == NULL) { 1723 ci->status = CTL_ISCSI_ERROR; 1724 snprintf(ci->error_str, sizeof(ci->error_str), 1725 "Unable to allocate memory"); 1726 mtx_unlock(&softc->lock); 1727 return; 1728 } 1729 bhsam = 1730 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1731 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1732 bhsam->bhsam_flags = 0x80; 1733 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1734 bhsam->bhsam_parameter3 = htons(10); 1735 cfiscsi_pdu_queue(response); 1736 found++; 1737 } 1738 mtx_unlock(&softc->lock); 1739 1740 if (found == 0) { 1741 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1742 snprintf(ci->error_str, sizeof(ci->error_str), 1743 "No matching connections found"); 1744 return; 1745 } 1746 1747 ci->status = CTL_ISCSI_OK; 1748 } 1749 1750 static void 1751 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1752 { 1753 struct icl_pdu *response; 1754 struct iscsi_bhs_asynchronous_message *bhsam; 1755 struct ctl_iscsi_terminate_params *citp; 1756 struct cfiscsi_session *cs; 1757 struct cfiscsi_softc *softc; 1758 int found = 0; 1759 1760 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1761 softc = &cfiscsi_softc; 1762 1763 mtx_lock(&softc->lock); 1764 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1765 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1766 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1767 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1768 continue; 1769 1770 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1771 if (response == NULL) { 1772 /* 1773 * Oh well. Just terminate the connection. 1774 */ 1775 } else { 1776 bhsam = (struct iscsi_bhs_asynchronous_message *) 1777 response->ip_bhs; 1778 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1779 bhsam->bhsam_flags = 0x80; 1780 bhsam->bhsam_0xffffffff = 0xffffffff; 1781 bhsam->bhsam_async_event = 1782 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1783 cfiscsi_pdu_queue(response); 1784 } 1785 cfiscsi_session_terminate(cs); 1786 found++; 1787 } 1788 mtx_unlock(&softc->lock); 1789 1790 if (found == 0) { 1791 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1792 snprintf(ci->error_str, sizeof(ci->error_str), 1793 "No matching connections found"); 1794 return; 1795 } 1796 1797 ci->status = CTL_ISCSI_OK; 1798 } 1799 1800 static void 1801 cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1802 { 1803 struct ctl_iscsi_limits_params *cilp; 1804 int error; 1805 1806 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1807 1808 error = icl_limits(cilp->offload, &cilp->data_segment_limit); 1809 if (error != 0) { 1810 ci->status = CTL_ISCSI_ERROR; 1811 snprintf(ci->error_str, sizeof(ci->error_str), 1812 "%s: icl_limits failed with error %d", 1813 __func__, error); 1814 return; 1815 } 1816 1817 ci->status = CTL_ISCSI_OK; 1818 } 1819 1820 #ifdef ICL_KERNEL_PROXY 1821 static void 1822 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1823 { 1824 struct ctl_iscsi_listen_params *cilp; 1825 struct sockaddr *sa; 1826 int error; 1827 1828 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1829 1830 if (cfiscsi_softc.listener == NULL) { 1831 CFISCSI_DEBUG("no listener"); 1832 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1833 ci->status = CTL_ISCSI_ERROR; 1834 return; 1835 } 1836 1837 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1838 if (error != 0) { 1839 CFISCSI_DEBUG("getsockaddr, error %d", error); 1840 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1841 ci->status = CTL_ISCSI_ERROR; 1842 return; 1843 } 1844 1845 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1846 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1847 if (error != 0) { 1848 free(sa, M_SONAME); 1849 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1850 snprintf(ci->error_str, sizeof(ci->error_str), 1851 "icl_listen_add failed, error %d", error); 1852 ci->status = CTL_ISCSI_ERROR; 1853 return; 1854 } 1855 1856 ci->status = CTL_ISCSI_OK; 1857 } 1858 1859 static void 1860 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1861 { 1862 struct ctl_iscsi_accept_params *ciap; 1863 struct cfiscsi_session *cs; 1864 int error; 1865 1866 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1867 1868 mtx_lock(&cfiscsi_softc.lock); 1869 for (;;) { 1870 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1871 if (cs->cs_waiting_for_ctld) 1872 break; 1873 } 1874 if (cs != NULL) 1875 break; 1876 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1877 if (error != 0) { 1878 mtx_unlock(&cfiscsi_softc.lock); 1879 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1880 ci->status = CTL_ISCSI_ERROR; 1881 return; 1882 } 1883 } 1884 mtx_unlock(&cfiscsi_softc.lock); 1885 1886 cs->cs_waiting_for_ctld = false; 1887 cs->cs_login_phase = true; 1888 1889 ciap->connection_id = cs->cs_id; 1890 ciap->portal_id = cs->cs_portal_id; 1891 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1892 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1893 cs->cs_initiator_sa->sa_len); 1894 if (error != 0) { 1895 snprintf(ci->error_str, sizeof(ci->error_str), 1896 "copyout failed with error %d", error); 1897 ci->status = CTL_ISCSI_ERROR; 1898 return; 1899 } 1900 1901 ci->status = CTL_ISCSI_OK; 1902 } 1903 1904 static void 1905 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1906 { 1907 struct ctl_iscsi_send_params *cisp; 1908 struct cfiscsi_session *cs; 1909 struct icl_pdu *ip; 1910 size_t datalen; 1911 void *data; 1912 int error; 1913 1914 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1915 1916 mtx_lock(&cfiscsi_softc.lock); 1917 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1918 if (cs->cs_id == cisp->connection_id) 1919 break; 1920 } 1921 if (cs == NULL) { 1922 mtx_unlock(&cfiscsi_softc.lock); 1923 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1924 ci->status = CTL_ISCSI_ERROR; 1925 return; 1926 } 1927 mtx_unlock(&cfiscsi_softc.lock); 1928 1929 #if 0 1930 if (cs->cs_login_phase == false) 1931 return (EBUSY); 1932 #endif 1933 1934 if (cs->cs_terminating) { 1935 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1936 ci->status = CTL_ISCSI_ERROR; 1937 return; 1938 } 1939 1940 datalen = cisp->data_segment_len; 1941 /* 1942 * XXX 1943 */ 1944 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1945 if (datalen > 65535) { 1946 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1947 ci->status = CTL_ISCSI_ERROR; 1948 return; 1949 } 1950 if (datalen > 0) { 1951 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1952 error = copyin(cisp->data_segment, data, datalen); 1953 if (error != 0) { 1954 free(data, M_CFISCSI); 1955 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1956 ci->status = CTL_ISCSI_ERROR; 1957 return; 1958 } 1959 } 1960 1961 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1962 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1963 if (datalen > 0) { 1964 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1965 free(data, M_CFISCSI); 1966 } 1967 CFISCSI_SESSION_LOCK(cs); 1968 icl_pdu_queue(ip); 1969 CFISCSI_SESSION_UNLOCK(cs); 1970 ci->status = CTL_ISCSI_OK; 1971 } 1972 1973 static void 1974 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1975 { 1976 struct ctl_iscsi_receive_params *cirp; 1977 struct cfiscsi_session *cs; 1978 struct icl_pdu *ip; 1979 void *data; 1980 int error; 1981 1982 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1983 1984 mtx_lock(&cfiscsi_softc.lock); 1985 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1986 if (cs->cs_id == cirp->connection_id) 1987 break; 1988 } 1989 if (cs == NULL) { 1990 mtx_unlock(&cfiscsi_softc.lock); 1991 snprintf(ci->error_str, sizeof(ci->error_str), 1992 "connection not found"); 1993 ci->status = CTL_ISCSI_ERROR; 1994 return; 1995 } 1996 mtx_unlock(&cfiscsi_softc.lock); 1997 1998 #if 0 1999 if (is->is_login_phase == false) 2000 return (EBUSY); 2001 #endif 2002 2003 CFISCSI_SESSION_LOCK(cs); 2004 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2005 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2006 if (error != 0) { 2007 CFISCSI_SESSION_UNLOCK(cs); 2008 snprintf(ci->error_str, sizeof(ci->error_str), 2009 "interrupted by signal"); 2010 ci->status = CTL_ISCSI_ERROR; 2011 return; 2012 } 2013 } 2014 2015 if (cs->cs_terminating) { 2016 CFISCSI_SESSION_UNLOCK(cs); 2017 snprintf(ci->error_str, sizeof(ci->error_str), 2018 "connection terminating"); 2019 ci->status = CTL_ISCSI_ERROR; 2020 return; 2021 } 2022 ip = cs->cs_login_pdu; 2023 cs->cs_login_pdu = NULL; 2024 CFISCSI_SESSION_UNLOCK(cs); 2025 2026 if (ip->ip_data_len > cirp->data_segment_len) { 2027 icl_pdu_free(ip); 2028 snprintf(ci->error_str, sizeof(ci->error_str), 2029 "data segment too big"); 2030 ci->status = CTL_ISCSI_ERROR; 2031 return; 2032 } 2033 2034 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2035 if (ip->ip_data_len > 0) { 2036 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2037 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2038 copyout(data, cirp->data_segment, ip->ip_data_len); 2039 free(data, M_CFISCSI); 2040 } 2041 2042 icl_pdu_free(ip); 2043 ci->status = CTL_ISCSI_OK; 2044 } 2045 2046 #endif /* !ICL_KERNEL_PROXY */ 2047 2048 static void 2049 cfiscsi_ioctl_port_create(struct ctl_req *req) 2050 { 2051 struct cfiscsi_target *ct; 2052 struct ctl_port *port; 2053 const char *target, *alias, *tags; 2054 struct scsi_vpd_id_descriptor *desc; 2055 ctl_options_t opts; 2056 int retval, len, idlen; 2057 uint16_t tag; 2058 2059 ctl_init_opts(&opts, req->num_args, req->kern_args); 2060 target = ctl_get_opt(&opts, "cfiscsi_target"); 2061 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2062 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2063 if (target == NULL || tags == NULL) { 2064 req->status = CTL_LUN_ERROR; 2065 snprintf(req->error_str, sizeof(req->error_str), 2066 "Missing required argument"); 2067 ctl_free_opts(&opts); 2068 return; 2069 } 2070 tag = strtol(tags, (char **)NULL, 10); 2071 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2072 if (ct == NULL) { 2073 req->status = CTL_LUN_ERROR; 2074 snprintf(req->error_str, sizeof(req->error_str), 2075 "failed to create target \"%s\"", target); 2076 ctl_free_opts(&opts); 2077 return; 2078 } 2079 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2080 req->status = CTL_LUN_ERROR; 2081 snprintf(req->error_str, sizeof(req->error_str), 2082 "target \"%s\" already exists", target); 2083 cfiscsi_target_release(ct); 2084 ctl_free_opts(&opts); 2085 return; 2086 } 2087 port = &ct->ct_port; 2088 // WAT 2089 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2090 goto done; 2091 2092 port->frontend = &cfiscsi_frontend; 2093 port->port_type = CTL_PORT_ISCSI; 2094 /* XXX KDM what should the real number be here? */ 2095 port->num_requested_ctl_io = 4096; 2096 port->port_name = "iscsi"; 2097 port->physical_port = tag; 2098 port->virtual_port = ct->ct_target_id; 2099 port->port_online = cfiscsi_online; 2100 port->port_offline = cfiscsi_offline; 2101 port->port_info = cfiscsi_info; 2102 port->onoff_arg = ct; 2103 port->lun_enable = cfiscsi_lun_enable; 2104 port->lun_disable = cfiscsi_lun_disable; 2105 port->targ_lun_arg = ct; 2106 port->fe_datamove = cfiscsi_datamove; 2107 port->fe_done = cfiscsi_done; 2108 2109 /* XXX KDM what should we report here? */ 2110 /* XXX These should probably be fetched from CTL. */ 2111 port->max_targets = 1; 2112 port->max_target_id = 15; 2113 2114 port->options = opts; 2115 STAILQ_INIT(&opts); 2116 2117 /* Generate Port ID. */ 2118 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2119 idlen = roundup2(idlen, 4); 2120 len = sizeof(struct scsi_vpd_device_id) + idlen; 2121 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2122 M_CTL, M_WAITOK | M_ZERO); 2123 port->port_devid->len = len; 2124 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2125 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2126 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2127 SVPD_ID_TYPE_SCSI_NAME; 2128 desc->length = idlen; 2129 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2130 2131 /* Generate Target ID. */ 2132 idlen = strlen(target) + 1; 2133 idlen = roundup2(idlen, 4); 2134 len = sizeof(struct scsi_vpd_device_id) + idlen; 2135 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2136 M_CTL, M_WAITOK | M_ZERO); 2137 port->target_devid->len = len; 2138 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2139 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2140 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2141 SVPD_ID_TYPE_SCSI_NAME; 2142 desc->length = idlen; 2143 strlcpy(desc->identifier, target, idlen); 2144 2145 retval = ctl_port_register(port); 2146 if (retval != 0) { 2147 ctl_free_opts(&port->options); 2148 cfiscsi_target_release(ct); 2149 free(port->port_devid, M_CFISCSI); 2150 free(port->target_devid, M_CFISCSI); 2151 req->status = CTL_LUN_ERROR; 2152 snprintf(req->error_str, sizeof(req->error_str), 2153 "ctl_port_register() failed with error %d", retval); 2154 return; 2155 } 2156 done: 2157 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2158 req->status = CTL_LUN_OK; 2159 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2160 sizeof(port->targ_port)); //XXX 2161 } 2162 2163 static void 2164 cfiscsi_ioctl_port_remove(struct ctl_req *req) 2165 { 2166 struct cfiscsi_target *ct; 2167 const char *target, *tags; 2168 ctl_options_t opts; 2169 uint16_t tag; 2170 2171 ctl_init_opts(&opts, req->num_args, req->kern_args); 2172 target = ctl_get_opt(&opts, "cfiscsi_target"); 2173 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2174 if (target == NULL || tags == NULL) { 2175 ctl_free_opts(&opts); 2176 req->status = CTL_LUN_ERROR; 2177 snprintf(req->error_str, sizeof(req->error_str), 2178 "Missing required argument"); 2179 return; 2180 } 2181 tag = strtol(tags, (char **)NULL, 10); 2182 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2183 if (ct == NULL) { 2184 ctl_free_opts(&opts); 2185 req->status = CTL_LUN_ERROR; 2186 snprintf(req->error_str, sizeof(req->error_str), 2187 "can't find target \"%s\"", target); 2188 return; 2189 } 2190 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2191 ctl_free_opts(&opts); 2192 req->status = CTL_LUN_ERROR; 2193 snprintf(req->error_str, sizeof(req->error_str), 2194 "target \"%s\" is already dying", target); 2195 return; 2196 } 2197 ctl_free_opts(&opts); 2198 2199 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2200 ctl_port_offline(&ct->ct_port); 2201 cfiscsi_target_release(ct); 2202 cfiscsi_target_release(ct); 2203 req->status = CTL_LUN_OK; 2204 } 2205 2206 static int 2207 cfiscsi_ioctl(struct cdev *dev, 2208 u_long cmd, caddr_t addr, int flag, struct thread *td) 2209 { 2210 struct ctl_iscsi *ci; 2211 struct ctl_req *req; 2212 2213 if (cmd == CTL_PORT_REQ) { 2214 req = (struct ctl_req *)addr; 2215 switch (req->reqtype) { 2216 case CTL_REQ_CREATE: 2217 cfiscsi_ioctl_port_create(req); 2218 break; 2219 case CTL_REQ_REMOVE: 2220 cfiscsi_ioctl_port_remove(req); 2221 break; 2222 default: 2223 req->status = CTL_LUN_ERROR; 2224 snprintf(req->error_str, sizeof(req->error_str), 2225 "Unsupported request type %d", req->reqtype); 2226 } 2227 return (0); 2228 } 2229 2230 if (cmd != CTL_ISCSI) 2231 return (ENOTTY); 2232 2233 ci = (struct ctl_iscsi *)addr; 2234 switch (ci->type) { 2235 case CTL_ISCSI_HANDOFF: 2236 cfiscsi_ioctl_handoff(ci); 2237 break; 2238 case CTL_ISCSI_LIST: 2239 cfiscsi_ioctl_list(ci); 2240 break; 2241 case CTL_ISCSI_LOGOUT: 2242 cfiscsi_ioctl_logout(ci); 2243 break; 2244 case CTL_ISCSI_TERMINATE: 2245 cfiscsi_ioctl_terminate(ci); 2246 break; 2247 case CTL_ISCSI_LIMITS: 2248 cfiscsi_ioctl_limits(ci); 2249 break; 2250 #ifdef ICL_KERNEL_PROXY 2251 case CTL_ISCSI_LISTEN: 2252 cfiscsi_ioctl_listen(ci); 2253 break; 2254 case CTL_ISCSI_ACCEPT: 2255 cfiscsi_ioctl_accept(ci); 2256 break; 2257 case CTL_ISCSI_SEND: 2258 cfiscsi_ioctl_send(ci); 2259 break; 2260 case CTL_ISCSI_RECEIVE: 2261 cfiscsi_ioctl_receive(ci); 2262 break; 2263 #else 2264 case CTL_ISCSI_LISTEN: 2265 case CTL_ISCSI_ACCEPT: 2266 case CTL_ISCSI_SEND: 2267 case CTL_ISCSI_RECEIVE: 2268 ci->status = CTL_ISCSI_ERROR; 2269 snprintf(ci->error_str, sizeof(ci->error_str), 2270 "%s: CTL compiled without ICL_KERNEL_PROXY", 2271 __func__); 2272 break; 2273 #endif /* !ICL_KERNEL_PROXY */ 2274 default: 2275 ci->status = CTL_ISCSI_ERROR; 2276 snprintf(ci->error_str, sizeof(ci->error_str), 2277 "%s: invalid iSCSI request type %d", __func__, ci->type); 2278 break; 2279 } 2280 2281 return (0); 2282 } 2283 2284 static void 2285 cfiscsi_target_hold(struct cfiscsi_target *ct) 2286 { 2287 2288 refcount_acquire(&ct->ct_refcount); 2289 } 2290 2291 static void 2292 cfiscsi_target_release(struct cfiscsi_target *ct) 2293 { 2294 struct cfiscsi_softc *softc; 2295 2296 softc = ct->ct_softc; 2297 mtx_lock(&softc->lock); 2298 if (refcount_release(&ct->ct_refcount)) { 2299 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2300 mtx_unlock(&softc->lock); 2301 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2302 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2303 if (ctl_port_deregister(&ct->ct_port) != 0) 2304 printf("%s: ctl_port_deregister() failed\n", 2305 __func__); 2306 } 2307 free(ct, M_CFISCSI); 2308 2309 return; 2310 } 2311 mtx_unlock(&softc->lock); 2312 } 2313 2314 static struct cfiscsi_target * 2315 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2316 { 2317 struct cfiscsi_target *ct; 2318 2319 mtx_lock(&softc->lock); 2320 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2321 if (ct->ct_tag != tag || 2322 strcmp(name, ct->ct_name) != 0 || 2323 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2324 continue; 2325 cfiscsi_target_hold(ct); 2326 mtx_unlock(&softc->lock); 2327 return (ct); 2328 } 2329 mtx_unlock(&softc->lock); 2330 2331 return (NULL); 2332 } 2333 2334 static struct cfiscsi_target * 2335 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2336 const char *alias, uint16_t tag) 2337 { 2338 struct cfiscsi_target *ct, *newct; 2339 2340 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2341 return (NULL); 2342 2343 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2344 2345 mtx_lock(&softc->lock); 2346 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2347 if (ct->ct_tag != tag || 2348 strcmp(name, ct->ct_name) != 0 || 2349 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2350 continue; 2351 cfiscsi_target_hold(ct); 2352 mtx_unlock(&softc->lock); 2353 free(newct, M_CFISCSI); 2354 return (ct); 2355 } 2356 2357 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2358 if (alias != NULL) 2359 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2360 newct->ct_tag = tag; 2361 refcount_init(&newct->ct_refcount, 1); 2362 newct->ct_softc = softc; 2363 if (TAILQ_EMPTY(&softc->targets)) 2364 softc->last_target_id = 0; 2365 newct->ct_target_id = ++softc->last_target_id; 2366 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2367 mtx_unlock(&softc->lock); 2368 2369 return (newct); 2370 } 2371 2372 static int 2373 cfiscsi_lun_enable(void *arg, int lun_id) 2374 { 2375 2376 return (0); 2377 } 2378 2379 static int 2380 cfiscsi_lun_disable(void *arg, int lun_id) 2381 { 2382 2383 return (0); 2384 } 2385 2386 static void 2387 cfiscsi_datamove_in(union ctl_io *io) 2388 { 2389 struct cfiscsi_session *cs; 2390 struct icl_pdu *request, *response; 2391 const struct iscsi_bhs_scsi_command *bhssc; 2392 struct iscsi_bhs_data_in *bhsdi; 2393 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2394 size_t len, expected_len, sg_len, buffer_offset; 2395 const char *sg_addr; 2396 int ctl_sg_count, error, i; 2397 2398 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2399 cs = PDU_SESSION(request); 2400 2401 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2402 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2403 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2404 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2405 2406 if (io->scsiio.kern_sg_entries > 0) { 2407 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2408 ctl_sg_count = io->scsiio.kern_sg_entries; 2409 } else { 2410 ctl_sglist = &ctl_sg_entry; 2411 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2412 ctl_sglist->len = io->scsiio.kern_data_len; 2413 ctl_sg_count = 1; 2414 } 2415 2416 /* 2417 * This is the total amount of data to be transferred within the current 2418 * SCSI command. We need to record it so that we can properly report 2419 * underflow/underflow. 2420 */ 2421 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2422 2423 /* 2424 * This is the offset within the current SCSI command; for the first 2425 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2426 * it will be the sum of lengths of previous ones. 2427 */ 2428 buffer_offset = io->scsiio.kern_rel_offset; 2429 2430 /* 2431 * This is the transfer length expected by the initiator. In theory, 2432 * it could be different from the correct amount of data from the SCSI 2433 * point of view, even if that doesn't make any sense. 2434 */ 2435 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2436 #if 0 2437 if (expected_len != io->scsiio.kern_total_len) { 2438 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2439 "actual length %zd", expected_len, 2440 (size_t)io->scsiio.kern_total_len); 2441 } 2442 #endif 2443 2444 if (buffer_offset >= expected_len) { 2445 #if 0 2446 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2447 "already sent the expected len", buffer_offset); 2448 #endif 2449 io->scsiio.be_move_done(io); 2450 return; 2451 } 2452 2453 i = 0; 2454 sg_addr = NULL; 2455 sg_len = 0; 2456 response = NULL; 2457 bhsdi = NULL; 2458 for (;;) { 2459 if (response == NULL) { 2460 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2461 if (response == NULL) { 2462 CFISCSI_SESSION_WARN(cs, "failed to " 2463 "allocate memory; dropping connection"); 2464 ctl_set_busy(&io->scsiio); 2465 io->scsiio.be_move_done(io); 2466 cfiscsi_session_terminate(cs); 2467 return; 2468 } 2469 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2470 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2471 bhsdi->bhsdi_initiator_task_tag = 2472 bhssc->bhssc_initiator_task_tag; 2473 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2474 PDU_EXPDATASN(request)++; 2475 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2476 } 2477 2478 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2479 if (sg_len == 0) { 2480 sg_addr = ctl_sglist[i].addr; 2481 sg_len = ctl_sglist[i].len; 2482 KASSERT(sg_len > 0, ("sg_len <= 0")); 2483 } 2484 2485 len = sg_len; 2486 2487 /* 2488 * Truncate to maximum data segment length. 2489 */ 2490 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2491 ("ip_data_len %zd >= max_data_segment_length %zd", 2492 response->ip_data_len, cs->cs_max_data_segment_length)); 2493 if (response->ip_data_len + len > 2494 cs->cs_max_data_segment_length) { 2495 len = cs->cs_max_data_segment_length - 2496 response->ip_data_len; 2497 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2498 len, sg_len)); 2499 } 2500 2501 /* 2502 * Truncate to expected data transfer length. 2503 */ 2504 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2505 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2506 buffer_offset, response->ip_data_len, expected_len)); 2507 if (buffer_offset + response->ip_data_len + len > expected_len) { 2508 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2509 "to expected data transfer length %zd", 2510 buffer_offset + response->ip_data_len + len, expected_len); 2511 len = expected_len - (buffer_offset + response->ip_data_len); 2512 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2513 len, sg_len)); 2514 } 2515 2516 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2517 if (error != 0) { 2518 CFISCSI_SESSION_WARN(cs, "failed to " 2519 "allocate memory; dropping connection"); 2520 icl_pdu_free(response); 2521 ctl_set_busy(&io->scsiio); 2522 io->scsiio.be_move_done(io); 2523 cfiscsi_session_terminate(cs); 2524 return; 2525 } 2526 sg_addr += len; 2527 sg_len -= len; 2528 2529 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2530 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2531 buffer_offset, response->ip_data_len, expected_len)); 2532 if (buffer_offset + response->ip_data_len == expected_len) { 2533 /* 2534 * Already have the amount of data the initiator wanted. 2535 */ 2536 break; 2537 } 2538 2539 if (sg_len == 0) { 2540 /* 2541 * End of scatter-gather segment; 2542 * proceed to the next one... 2543 */ 2544 if (i == ctl_sg_count - 1) { 2545 /* 2546 * ... unless this was the last one. 2547 */ 2548 break; 2549 } 2550 i++; 2551 } 2552 2553 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2554 /* 2555 * Can't stuff more data into the current PDU; 2556 * queue it. Note that's not enough to check 2557 * for kern_data_resid == 0 instead; there 2558 * may be several Data-In PDUs for the final 2559 * call to cfiscsi_datamove(), and we want 2560 * to set the F flag only on the last of them. 2561 */ 2562 buffer_offset += response->ip_data_len; 2563 if (buffer_offset == io->scsiio.kern_total_len || 2564 buffer_offset == expected_len) { 2565 buffer_offset -= response->ip_data_len; 2566 break; 2567 } 2568 cfiscsi_pdu_queue(response); 2569 response = NULL; 2570 bhsdi = NULL; 2571 } 2572 } 2573 if (response != NULL) { 2574 buffer_offset += response->ip_data_len; 2575 if (buffer_offset == io->scsiio.kern_total_len || 2576 buffer_offset == expected_len) { 2577 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2578 if (io->io_hdr.status == CTL_SUCCESS) { 2579 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2580 if (PDU_TOTAL_TRANSFER_LEN(request) < 2581 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2582 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2583 bhsdi->bhsdi_residual_count = 2584 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2585 PDU_TOTAL_TRANSFER_LEN(request)); 2586 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2587 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2588 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2589 bhsdi->bhsdi_residual_count = 2590 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2591 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2592 } 2593 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2594 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2595 } 2596 } 2597 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2598 cfiscsi_pdu_queue(response); 2599 } 2600 2601 io->scsiio.be_move_done(io); 2602 } 2603 2604 static void 2605 cfiscsi_datamove_out(union ctl_io *io) 2606 { 2607 struct cfiscsi_session *cs; 2608 struct icl_pdu *request, *response; 2609 const struct iscsi_bhs_scsi_command *bhssc; 2610 struct iscsi_bhs_r2t *bhsr2t; 2611 struct cfiscsi_data_wait *cdw; 2612 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2613 uint32_t expected_len, r2t_off, r2t_len; 2614 uint32_t target_transfer_tag; 2615 bool done; 2616 2617 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2618 cs = PDU_SESSION(request); 2619 2620 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2621 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2622 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2623 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2624 2625 /* 2626 * We need to record it so that we can properly report 2627 * underflow/underflow. 2628 */ 2629 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2630 2631 /* 2632 * Report write underflow as error since CTL and backends don't 2633 * really support it, and SCSI does not tell how to do it right. 2634 */ 2635 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2636 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2637 expected_len) { 2638 io->scsiio.io_hdr.port_status = 43; 2639 io->scsiio.be_move_done(io); 2640 return; 2641 } 2642 2643 target_transfer_tag = 2644 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2645 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2646 &target_transfer_tag); 2647 if (cdw == NULL) { 2648 CFISCSI_SESSION_WARN(cs, "failed to " 2649 "allocate memory; dropping connection"); 2650 ctl_set_busy(&io->scsiio); 2651 io->scsiio.be_move_done(io); 2652 cfiscsi_session_terminate(cs); 2653 return; 2654 } 2655 #if 0 2656 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2657 "task tag 0x%x, target transfer tag 0x%x", 2658 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2659 #endif 2660 2661 cdw->cdw_ctl_io = io; 2662 cdw->cdw_target_transfer_tag = target_transfer_tag; 2663 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2664 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2665 cdw->cdw_datasn = 0; 2666 2667 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2668 if (io->scsiio.kern_sg_entries > 0) { 2669 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2670 } else { 2671 ctl_sglist = &ctl_sg_entry; 2672 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2673 ctl_sglist->len = io->scsiio.kern_data_len; 2674 } 2675 cdw->cdw_sg_index = 0; 2676 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2677 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2678 r2t_off = io->scsiio.ext_data_filled; 2679 while (r2t_off > 0) { 2680 if (r2t_off >= cdw->cdw_sg_len) { 2681 r2t_off -= cdw->cdw_sg_len; 2682 cdw->cdw_sg_index++; 2683 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2684 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2685 continue; 2686 } 2687 cdw->cdw_sg_addr += r2t_off; 2688 cdw->cdw_sg_len -= r2t_off; 2689 r2t_off = 0; 2690 } 2691 2692 if (cs->cs_immediate_data && 2693 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2694 icl_pdu_data_segment_length(request)) { 2695 done = cfiscsi_handle_data_segment(request, cdw); 2696 if (done) { 2697 cfiscsi_data_wait_free(cs, cdw); 2698 io->scsiio.be_move_done(io); 2699 return; 2700 } 2701 } 2702 2703 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2704 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2705 cs->cs_max_burst_length); 2706 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2707 2708 CFISCSI_SESSION_LOCK(cs); 2709 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2710 CFISCSI_SESSION_UNLOCK(cs); 2711 2712 /* 2713 * XXX: We should limit the number of outstanding R2T PDUs 2714 * per task to MaxOutstandingR2T. 2715 */ 2716 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2717 if (response == NULL) { 2718 CFISCSI_SESSION_WARN(cs, "failed to " 2719 "allocate memory; dropping connection"); 2720 ctl_set_busy(&io->scsiio); 2721 io->scsiio.be_move_done(io); 2722 cfiscsi_session_terminate(cs); 2723 return; 2724 } 2725 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2726 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2727 bhsr2t->bhsr2t_flags = 0x80; 2728 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2729 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2730 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2731 /* 2732 * XXX: Here we assume that cfiscsi_datamove() won't ever 2733 * be running concurrently on several CPUs for a given 2734 * command. 2735 */ 2736 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2737 PDU_R2TSN(request)++; 2738 /* 2739 * This is the offset within the current SCSI command; 2740 * i.e. for the first call of datamove(), it will be 0, 2741 * and for subsequent ones it will be the sum of lengths 2742 * of previous ones. 2743 * 2744 * The ext_data_filled is to account for unsolicited 2745 * (immediate) data that might have already arrived. 2746 */ 2747 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2748 /* 2749 * This is the total length (sum of S/G lengths) this call 2750 * to cfiscsi_datamove() is supposed to handle, limited by 2751 * MaxBurstLength. 2752 */ 2753 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2754 cfiscsi_pdu_queue(response); 2755 } 2756 2757 static void 2758 cfiscsi_datamove(union ctl_io *io) 2759 { 2760 2761 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2762 cfiscsi_datamove_in(io); 2763 else { 2764 /* We hadn't received anything during this datamove yet. */ 2765 io->scsiio.ext_data_filled = 0; 2766 cfiscsi_datamove_out(io); 2767 } 2768 } 2769 2770 static void 2771 cfiscsi_scsi_command_done(union ctl_io *io) 2772 { 2773 struct icl_pdu *request, *response; 2774 struct iscsi_bhs_scsi_command *bhssc; 2775 struct iscsi_bhs_scsi_response *bhssr; 2776 #ifdef DIAGNOSTIC 2777 struct cfiscsi_data_wait *cdw; 2778 #endif 2779 struct cfiscsi_session *cs; 2780 uint16_t sense_length; 2781 2782 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2783 cs = PDU_SESSION(request); 2784 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2785 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2786 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2787 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2788 2789 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2790 // bhssc->bhssc_initiator_task_tag); 2791 2792 #ifdef DIAGNOSTIC 2793 CFISCSI_SESSION_LOCK(cs); 2794 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2795 KASSERT(bhssc->bhssc_initiator_task_tag != 2796 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2797 CFISCSI_SESSION_UNLOCK(cs); 2798 #endif 2799 2800 /* 2801 * Do not return status for aborted commands. 2802 * There are exceptions, but none supported by CTL yet. 2803 */ 2804 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2805 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2806 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2807 ctl_free_io(io); 2808 icl_pdu_free(request); 2809 return; 2810 } 2811 2812 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2813 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2814 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2815 bhssr->bhssr_flags = 0x80; 2816 /* 2817 * XXX: We don't deal with bidirectional under/overflows; 2818 * does anything actually support those? 2819 */ 2820 if (PDU_TOTAL_TRANSFER_LEN(request) < 2821 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2822 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2823 bhssr->bhssr_residual_count = 2824 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2825 PDU_TOTAL_TRANSFER_LEN(request)); 2826 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2827 // ntohl(bhssr->bhssr_residual_count)); 2828 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2829 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2830 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2831 bhssr->bhssr_residual_count = 2832 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2833 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2834 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2835 // ntohl(bhssr->bhssr_residual_count)); 2836 } 2837 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2838 bhssr->bhssr_status = io->scsiio.scsi_status; 2839 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2840 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2841 2842 if (io->scsiio.sense_len > 0) { 2843 #if 0 2844 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2845 io->scsiio.sense_len); 2846 #endif 2847 sense_length = htons(io->scsiio.sense_len); 2848 icl_pdu_append_data(response, 2849 &sense_length, sizeof(sense_length), M_WAITOK); 2850 icl_pdu_append_data(response, 2851 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2852 } 2853 2854 ctl_free_io(io); 2855 icl_pdu_free(request); 2856 cfiscsi_pdu_queue(response); 2857 } 2858 2859 static void 2860 cfiscsi_task_management_done(union ctl_io *io) 2861 { 2862 struct icl_pdu *request, *response; 2863 struct iscsi_bhs_task_management_request *bhstmr; 2864 struct iscsi_bhs_task_management_response *bhstmr2; 2865 struct cfiscsi_data_wait *cdw, *tmpcdw; 2866 struct cfiscsi_session *cs; 2867 2868 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2869 cs = PDU_SESSION(request); 2870 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2871 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2872 ISCSI_BHS_OPCODE_TASK_REQUEST, 2873 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2874 2875 #if 0 2876 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2877 bhstmr->bhstmr_initiator_task_tag, 2878 bhstmr->bhstmr_referenced_task_tag); 2879 #endif 2880 2881 if ((bhstmr->bhstmr_function & ~0x80) == 2882 BHSTMR_FUNCTION_ABORT_TASK) { 2883 /* 2884 * Make sure we no longer wait for Data-Out for this command. 2885 */ 2886 CFISCSI_SESSION_LOCK(cs); 2887 TAILQ_FOREACH_SAFE(cdw, 2888 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2889 if (bhstmr->bhstmr_referenced_task_tag != 2890 cdw->cdw_initiator_task_tag) 2891 continue; 2892 2893 #if 0 2894 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2895 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2896 #endif 2897 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2898 cdw, cdw_next); 2899 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2900 cfiscsi_data_wait_free(cs, cdw); 2901 } 2902 CFISCSI_SESSION_UNLOCK(cs); 2903 } 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 if (io->io_hdr.status == CTL_SUCCESS) { 2911 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2912 } else { 2913 /* 2914 * XXX: How to figure out what exactly went wrong? iSCSI spec 2915 * expects us to provide detailed error, e.g. "Task does 2916 * not exist" or "LUN does not exist". 2917 */ 2918 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2919 bhstmr2->bhstmr_response = 2920 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2921 } 2922 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2923 2924 ctl_free_io(io); 2925 icl_pdu_free(request); 2926 cfiscsi_pdu_queue(response); 2927 } 2928 2929 static void 2930 cfiscsi_done(union ctl_io *io) 2931 { 2932 struct icl_pdu *request; 2933 struct cfiscsi_session *cs; 2934 2935 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2936 ("invalid CTL status %#x", io->io_hdr.status)); 2937 2938 if (io->io_hdr.io_type == CTL_IO_TASK && 2939 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2940 /* 2941 * Implicit task termination has just completed; nothing to do. 2942 */ 2943 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2944 cs->cs_tasks_aborted = true; 2945 refcount_release(&cs->cs_outstanding_ctl_pdus); 2946 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2947 ctl_free_io(io); 2948 return; 2949 } 2950 2951 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2952 cs = PDU_SESSION(request); 2953 refcount_release(&cs->cs_outstanding_ctl_pdus); 2954 2955 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2956 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2957 cfiscsi_scsi_command_done(io); 2958 break; 2959 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2960 cfiscsi_task_management_done(io); 2961 break; 2962 default: 2963 panic("cfiscsi_done called with wrong opcode 0x%x", 2964 request->ip_bhs->bhs_opcode); 2965 } 2966 } 2967