1 /*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 /* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/param.h> 40 #include <sys/capsicum.h> 41 #include <sys/condvar.h> 42 #include <sys/file.h> 43 #include <sys/kernel.h> 44 #include <sys/kthread.h> 45 #include <sys/lock.h> 46 #include <sys/malloc.h> 47 #include <sys/module.h> 48 #include <sys/mutex.h> 49 #include <sys/queue.h> 50 #include <sys/sbuf.h> 51 #include <sys/sysctl.h> 52 #include <sys/systm.h> 53 #include <sys/uio.h> 54 #include <sys/unistd.h> 55 #include <vm/uma.h> 56 57 #include <cam/scsi/scsi_all.h> 58 #include <cam/scsi/scsi_da.h> 59 #include <cam/ctl/ctl_io.h> 60 #include <cam/ctl/ctl.h> 61 #include <cam/ctl/ctl_backend.h> 62 #include <cam/ctl/ctl_error.h> 63 #include <cam/ctl/ctl_frontend.h> 64 #include <cam/ctl/ctl_frontend_internal.h> 65 #include <cam/ctl/ctl_debug.h> 66 #include <cam/ctl/ctl_ha.h> 67 #include <cam/ctl/ctl_ioctl.h> 68 #include <cam/ctl/ctl_private.h> 69 70 #include <dev/iscsi/icl.h> 71 #include <dev/iscsi/iscsi_proto.h> 72 #include <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, 150 struct ctl_id target_id, int lun_id); 151 static int cfiscsi_lun_disable(void *arg, 152 struct ctl_id target_id, int lun_id); 153 static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 154 static int cfiscsi_ioctl(struct cdev *dev, 155 u_long cmd, caddr_t addr, int flag, struct thread *td); 156 static void cfiscsi_datamove(union ctl_io *io); 157 static void cfiscsi_datamove_in(union ctl_io *io); 158 static void cfiscsi_datamove_out(union ctl_io *io); 159 static void cfiscsi_done(union ctl_io *io); 160 static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 161 static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 162 static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 163 static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 164 static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 165 static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 166 static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 167 static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 168 *softc, const char *name); 169 static struct cfiscsi_target *cfiscsi_target_find_or_create( 170 struct cfiscsi_softc *softc, const char *name, const char *alias); 171 static void cfiscsi_target_release(struct cfiscsi_target *ct); 172 static void cfiscsi_session_delete(struct cfiscsi_session *cs); 173 174 static struct cfiscsi_softc cfiscsi_softc; 175 extern struct ctl_softc *control_softc; 176 177 static struct ctl_frontend cfiscsi_frontend = 178 { 179 .name = "iscsi", 180 .init = cfiscsi_init, 181 .ioctl = cfiscsi_ioctl, 182 }; 183 CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 184 MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 185 186 static struct icl_pdu * 187 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 188 { 189 190 return (icl_pdu_new(request->ip_conn, flags)); 191 } 192 193 static bool 194 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 195 { 196 const struct iscsi_bhs_scsi_command *bhssc; 197 struct cfiscsi_session *cs; 198 uint32_t cmdsn, expstatsn; 199 200 cs = PDU_SESSION(request); 201 202 /* 203 * Every incoming PDU - not just NOP-Out - resets the ping timer. 204 * The purpose of the timeout is to reset the connection when it stalls; 205 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 206 * in some queue. 207 * 208 * XXX: Locking? 209 */ 210 cs->cs_timeout = 0; 211 212 /* 213 * Data-Out PDUs don't contain CmdSN. 214 */ 215 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 216 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 217 return (false); 218 219 /* 220 * We're only using fields common for all the request 221 * (initiator -> target) PDUs. 222 */ 223 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 224 cmdsn = ntohl(bhssc->bhssc_cmdsn); 225 expstatsn = ntohl(bhssc->bhssc_expstatsn); 226 227 CFISCSI_SESSION_LOCK(cs); 228 #if 0 229 if (expstatsn != cs->cs_statsn) { 230 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 231 "while current StatSN is %d", expstatsn, 232 cs->cs_statsn); 233 } 234 #endif 235 236 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 237 /* 238 * The target MUST silently ignore any non-immediate command 239 * outside of this range. 240 */ 241 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 242 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 243 CFISCSI_SESSION_UNLOCK(cs); 244 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 245 "while expected %u", cmdsn, cs->cs_cmdsn); 246 return (true); 247 } 248 249 /* 250 * We don't support multiple connections now, so any 251 * discontinuity in CmdSN means lost PDUs. Since we don't 252 * support PDU retransmission -- terminate the connection. 253 */ 254 if (cmdsn != cs->cs_cmdsn) { 255 CFISCSI_SESSION_UNLOCK(cs); 256 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 257 "while expected %u; dropping connection", 258 cmdsn, cs->cs_cmdsn); 259 cfiscsi_session_terminate(cs); 260 return (true); 261 } 262 cs->cs_cmdsn++; 263 } 264 265 CFISCSI_SESSION_UNLOCK(cs); 266 267 return (false); 268 } 269 270 static void 271 cfiscsi_pdu_handle(struct icl_pdu *request) 272 { 273 struct cfiscsi_session *cs; 274 bool ignore; 275 276 cs = PDU_SESSION(request); 277 278 ignore = cfiscsi_pdu_update_cmdsn(request); 279 if (ignore) { 280 icl_pdu_free(request); 281 return; 282 } 283 284 /* 285 * Handle the PDU; this includes e.g. receiving the remaining 286 * part of PDU and submitting the SCSI command to CTL 287 * or queueing a reply. The handling routine is responsible 288 * for freeing the PDU when it's no longer needed. 289 */ 290 switch (request->ip_bhs->bhs_opcode & 291 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 292 case ISCSI_BHS_OPCODE_NOP_OUT: 293 cfiscsi_pdu_handle_nop_out(request); 294 break; 295 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 296 cfiscsi_pdu_handle_scsi_command(request); 297 break; 298 case ISCSI_BHS_OPCODE_TASK_REQUEST: 299 cfiscsi_pdu_handle_task_request(request); 300 break; 301 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 302 cfiscsi_pdu_handle_data_out(request); 303 break; 304 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 305 cfiscsi_pdu_handle_logout_request(request); 306 break; 307 default: 308 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 309 "opcode 0x%x; dropping connection", 310 request->ip_bhs->bhs_opcode); 311 icl_pdu_free(request); 312 cfiscsi_session_terminate(cs); 313 } 314 315 } 316 317 static void 318 cfiscsi_receive_callback(struct icl_pdu *request) 319 { 320 struct cfiscsi_session *cs; 321 322 cs = PDU_SESSION(request); 323 324 #ifdef ICL_KERNEL_PROXY 325 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 326 if (cs->cs_login_pdu == NULL) 327 cs->cs_login_pdu = request; 328 else 329 icl_pdu_free(request); 330 cv_signal(&cs->cs_login_cv); 331 return; 332 } 333 #endif 334 335 cfiscsi_pdu_handle(request); 336 } 337 338 static void 339 cfiscsi_error_callback(struct icl_conn *ic) 340 { 341 struct cfiscsi_session *cs; 342 343 cs = CONN_SESSION(ic); 344 345 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 346 cfiscsi_session_terminate(cs); 347 } 348 349 static int 350 cfiscsi_pdu_prepare(struct icl_pdu *response) 351 { 352 struct cfiscsi_session *cs; 353 struct iscsi_bhs_scsi_response *bhssr; 354 bool advance_statsn = true; 355 356 cs = PDU_SESSION(response); 357 358 CFISCSI_SESSION_LOCK_ASSERT(cs); 359 360 /* 361 * We're only using fields common for all the response 362 * (target -> initiator) PDUs. 363 */ 364 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 365 366 /* 367 * 10.8.3: "The StatSN for this connection is not advanced 368 * after this PDU is sent." 369 */ 370 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 371 advance_statsn = false; 372 373 /* 374 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 375 * StatSN for the connection is not advanced after this PDU is sent." 376 */ 377 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 378 bhssr->bhssr_initiator_task_tag == 0xffffffff) 379 advance_statsn = false; 380 381 /* 382 * See the comment below - StatSN is not meaningful and must 383 * not be advanced. 384 */ 385 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 386 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 387 advance_statsn = false; 388 389 /* 390 * 10.7.3: "The fields StatSN, Status, and Residual Count 391 * only have meaningful content if the S bit is set to 1." 392 */ 393 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 394 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 395 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 396 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 397 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 398 399 if (advance_statsn) 400 cs->cs_statsn++; 401 402 return (0); 403 } 404 405 static void 406 cfiscsi_pdu_queue(struct icl_pdu *response) 407 { 408 struct cfiscsi_session *cs; 409 410 cs = PDU_SESSION(response); 411 412 CFISCSI_SESSION_LOCK(cs); 413 cfiscsi_pdu_prepare(response); 414 icl_pdu_queue(response); 415 CFISCSI_SESSION_UNLOCK(cs); 416 } 417 418 static uint32_t 419 cfiscsi_decode_lun(uint64_t encoded) 420 { 421 uint8_t lun[8]; 422 uint32_t result; 423 424 /* 425 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 426 * but is in fact an evil, multidimensional structure defined 427 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 428 */ 429 memcpy(lun, &encoded, sizeof(lun)); 430 switch (lun[0] & 0xC0) { 431 case 0x00: 432 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 433 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 434 CFISCSI_WARN("malformed LUN " 435 "(peripheral device addressing method): 0x%jx", 436 (uintmax_t)encoded); 437 result = 0xffffffff; 438 break; 439 } 440 result = lun[1]; 441 break; 442 case 0x40: 443 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 444 lun[6] != 0 || lun[7] != 0) { 445 CFISCSI_WARN("malformed LUN " 446 "(flat address space addressing method): 0x%jx", 447 (uintmax_t)encoded); 448 result = 0xffffffff; 449 break; 450 } 451 result = ((lun[0] & 0x3f) << 8) + lun[1]; 452 break; 453 case 0xC0: 454 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 455 lun[6] != 0 || lun[7] != 0) { 456 CFISCSI_WARN("malformed LUN (extended flat " 457 "address space addressing method): 0x%jx", 458 (uintmax_t)encoded); 459 result = 0xffffffff; 460 break; 461 } 462 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 463 default: 464 CFISCSI_WARN("unsupported LUN format 0x%jx", 465 (uintmax_t)encoded); 466 result = 0xffffffff; 467 break; 468 } 469 470 return (result); 471 } 472 473 static void 474 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 475 { 476 struct cfiscsi_session *cs; 477 struct iscsi_bhs_nop_out *bhsno; 478 struct iscsi_bhs_nop_in *bhsni; 479 struct icl_pdu *response; 480 void *data = NULL; 481 size_t datasize; 482 int error; 483 484 cs = PDU_SESSION(request); 485 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 486 487 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 488 /* 489 * Nothing to do, iscsi_pdu_update_statsn() already 490 * zeroed the timeout. 491 */ 492 icl_pdu_free(request); 493 return; 494 } 495 496 datasize = icl_pdu_data_segment_length(request); 497 if (datasize > 0) { 498 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 499 if (data == NULL) { 500 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 501 "dropping connection"); 502 icl_pdu_free(request); 503 cfiscsi_session_terminate(cs); 504 return; 505 } 506 icl_pdu_get_data(request, 0, data, datasize); 507 } 508 509 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 510 if (response == NULL) { 511 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 512 "droppping connection"); 513 free(data, M_CFISCSI); 514 icl_pdu_free(request); 515 cfiscsi_session_terminate(cs); 516 return; 517 } 518 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 519 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 520 bhsni->bhsni_flags = 0x80; 521 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 522 bhsni->bhsni_target_transfer_tag = 0xffffffff; 523 if (datasize > 0) { 524 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 525 if (error != 0) { 526 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 527 "dropping connection"); 528 free(data, M_CFISCSI); 529 icl_pdu_free(request); 530 icl_pdu_free(response); 531 cfiscsi_session_terminate(cs); 532 return; 533 } 534 free(data, M_CFISCSI); 535 } 536 537 icl_pdu_free(request); 538 cfiscsi_pdu_queue(response); 539 } 540 541 static void 542 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 543 { 544 struct iscsi_bhs_scsi_command *bhssc; 545 struct cfiscsi_session *cs; 546 union ctl_io *io; 547 int error; 548 549 cs = PDU_SESSION(request); 550 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 551 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 552 // bhssc->bhssc_initiator_task_tag); 553 554 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 555 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 556 "ImmediateData=No; dropping connection"); 557 icl_pdu_free(request); 558 cfiscsi_session_terminate(cs); 559 return; 560 } 561 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 562 ctl_zero_io(io); 563 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 564 io->io_hdr.io_type = CTL_IO_SCSI; 565 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 566 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 567 io->io_hdr.nexus.targ_target.id = 0; 568 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 569 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 570 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 571 case BHSSC_FLAGS_ATTR_UNTAGGED: 572 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 573 break; 574 case BHSSC_FLAGS_ATTR_SIMPLE: 575 io->scsiio.tag_type = CTL_TAG_SIMPLE; 576 break; 577 case BHSSC_FLAGS_ATTR_ORDERED: 578 io->scsiio.tag_type = CTL_TAG_ORDERED; 579 break; 580 case BHSSC_FLAGS_ATTR_HOQ: 581 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 582 break; 583 case BHSSC_FLAGS_ATTR_ACA: 584 io->scsiio.tag_type = CTL_TAG_ACA; 585 break; 586 default: 587 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 588 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 589 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 590 break; 591 } 592 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 593 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 594 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 595 error = ctl_queue(io); 596 if (error != CTL_RETVAL_COMPLETE) { 597 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 598 "dropping connection", error); 599 ctl_free_io(io); 600 refcount_release(&cs->cs_outstanding_ctl_pdus); 601 icl_pdu_free(request); 602 cfiscsi_session_terminate(cs); 603 } 604 } 605 606 static void 607 cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 608 { 609 struct iscsi_bhs_task_management_request *bhstmr; 610 struct iscsi_bhs_task_management_response *bhstmr2; 611 struct icl_pdu *response; 612 struct cfiscsi_session *cs; 613 union ctl_io *io; 614 int error; 615 616 cs = PDU_SESSION(request); 617 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 618 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 619 ctl_zero_io(io); 620 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 621 io->io_hdr.io_type = CTL_IO_TASK; 622 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 623 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 624 io->io_hdr.nexus.targ_target.id = 0; 625 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 626 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 627 628 switch (bhstmr->bhstmr_function & ~0x80) { 629 case BHSTMR_FUNCTION_ABORT_TASK: 630 #if 0 631 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 632 #endif 633 io->taskio.task_action = CTL_TASK_ABORT_TASK; 634 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 635 break; 636 case BHSTMR_FUNCTION_ABORT_TASK_SET: 637 #if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 639 #endif 640 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 641 break; 642 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 643 #if 0 644 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 645 #endif 646 io->taskio.task_action = CTL_TASK_LUN_RESET; 647 break; 648 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 649 #if 0 650 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 651 #endif 652 io->taskio.task_action = CTL_TASK_TARGET_RESET; 653 break; 654 default: 655 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 656 bhstmr->bhstmr_function & ~0x80); 657 ctl_free_io(io); 658 659 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 660 if (response == NULL) { 661 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 662 "dropping connection"); 663 icl_pdu_free(request); 664 cfiscsi_session_terminate(cs); 665 return; 666 } 667 bhstmr2 = (struct iscsi_bhs_task_management_response *) 668 response->ip_bhs; 669 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 670 bhstmr2->bhstmr_flags = 0x80; 671 bhstmr2->bhstmr_response = 672 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 673 bhstmr2->bhstmr_initiator_task_tag = 674 bhstmr->bhstmr_initiator_task_tag; 675 icl_pdu_free(request); 676 cfiscsi_pdu_queue(response); 677 return; 678 } 679 680 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 681 error = ctl_queue(io); 682 if (error != CTL_RETVAL_COMPLETE) { 683 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 684 "dropping connection", error); 685 ctl_free_io(io); 686 refcount_release(&cs->cs_outstanding_ctl_pdus); 687 icl_pdu_free(request); 688 cfiscsi_session_terminate(cs); 689 } 690 } 691 692 static bool 693 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 694 { 695 struct iscsi_bhs_data_out *bhsdo; 696 struct cfiscsi_session *cs; 697 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 698 size_t copy_len, len, off, buffer_offset; 699 int ctl_sg_count; 700 union ctl_io *io; 701 702 cs = PDU_SESSION(request); 703 704 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 705 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 706 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 707 ISCSI_BHS_OPCODE_SCSI_COMMAND, 708 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 709 710 /* 711 * We're only using fields common for Data-Out and SCSI Command PDUs. 712 */ 713 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 714 715 io = cdw->cdw_ctl_io; 716 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 717 ("CTL_FLAG_DATA_IN")); 718 719 #if 0 720 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 721 request->ip_data_len, io->scsiio.kern_total_len); 722 #endif 723 724 if (io->scsiio.kern_sg_entries > 0) { 725 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 726 ctl_sg_count = io->scsiio.kern_sg_entries; 727 } else { 728 ctl_sglist = &ctl_sg_entry; 729 ctl_sglist->addr = io->scsiio.kern_data_ptr; 730 ctl_sglist->len = io->scsiio.kern_data_len; 731 ctl_sg_count = 1; 732 } 733 734 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 735 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 736 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 737 else 738 buffer_offset = 0; 739 len = icl_pdu_data_segment_length(request); 740 741 /* 742 * Make sure the offset, as sent by the initiator, matches the offset 743 * we're supposed to be at in the scatter-gather list. 744 */ 745 if (buffer_offset > 746 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 747 buffer_offset + len <= 748 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 749 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 750 "expected %zd; dropping connection", buffer_offset, 751 (size_t)io->scsiio.kern_rel_offset + 752 (size_t)io->scsiio.ext_data_filled); 753 ctl_set_data_phase_error(&io->scsiio); 754 cfiscsi_session_terminate(cs); 755 return (true); 756 } 757 758 /* 759 * This is the offset within the PDU data segment, as opposed 760 * to buffer_offset, which is the offset within the task (SCSI 761 * command). 762 */ 763 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 764 buffer_offset; 765 766 /* 767 * Iterate over the scatter/gather segments, filling them with data 768 * from the PDU data segment. Note that this can get called multiple 769 * times for one SCSI command; the cdw structure holds state for the 770 * scatter/gather list. 771 */ 772 for (;;) { 773 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 774 ("cdw->cdw_sg_index >= ctl_sg_count")); 775 if (cdw->cdw_sg_len == 0) { 776 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 777 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 778 } 779 KASSERT(off <= len, ("len > off")); 780 copy_len = len - off; 781 if (copy_len > cdw->cdw_sg_len) 782 copy_len = cdw->cdw_sg_len; 783 784 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 785 cdw->cdw_sg_addr += copy_len; 786 cdw->cdw_sg_len -= copy_len; 787 off += copy_len; 788 io->scsiio.ext_data_filled += copy_len; 789 790 if (cdw->cdw_sg_len == 0) { 791 /* 792 * End of current segment. 793 */ 794 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 795 /* 796 * Last segment in scatter/gather list. 797 */ 798 break; 799 } 800 cdw->cdw_sg_index++; 801 } 802 803 if (off == len) { 804 /* 805 * End of PDU payload. 806 */ 807 break; 808 } 809 } 810 811 if (len > off) { 812 /* 813 * In case of unsolicited data, it's possible that the buffer 814 * provided by CTL is smaller than negotiated FirstBurstLength. 815 * Just ignore the superfluous data; will ask for them with R2T 816 * on next call to cfiscsi_datamove(). 817 * 818 * This obviously can only happen with SCSI Command PDU. 819 */ 820 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 821 ISCSI_BHS_OPCODE_SCSI_COMMAND) 822 return (true); 823 824 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 825 "expected %zd; dropping connection", 826 icl_pdu_data_segment_length(request), off); 827 ctl_set_data_phase_error(&io->scsiio); 828 cfiscsi_session_terminate(cs); 829 return (true); 830 } 831 832 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 833 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 834 CFISCSI_SESSION_WARN(cs, "got the final packet without " 835 "the F flag; flags = 0x%x; dropping connection", 836 bhsdo->bhsdo_flags); 837 ctl_set_data_phase_error(&io->scsiio); 838 cfiscsi_session_terminate(cs); 839 return (true); 840 } 841 842 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 843 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 844 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 845 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 846 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 847 "transmitted size was %zd bytes instead of %d; " 848 "dropping connection", 849 (size_t)io->scsiio.ext_data_filled, 850 cdw->cdw_r2t_end); 851 ctl_set_data_phase_error(&io->scsiio); 852 cfiscsi_session_terminate(cs); 853 return (true); 854 } else { 855 /* 856 * For SCSI Command PDU, this just means we need to 857 * solicit more data by sending R2T. 858 */ 859 return (false); 860 } 861 } 862 863 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 864 #if 0 865 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 866 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 867 #endif 868 869 return (true); 870 } 871 872 return (false); 873 } 874 875 static void 876 cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 877 { 878 struct iscsi_bhs_data_out *bhsdo; 879 struct cfiscsi_session *cs; 880 struct cfiscsi_data_wait *cdw = NULL; 881 union ctl_io *io; 882 bool done; 883 884 cs = PDU_SESSION(request); 885 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 886 887 CFISCSI_SESSION_LOCK(cs); 888 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 889 #if 0 890 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 891 "ttt 0x%x, itt 0x%x", 892 bhsdo->bhsdo_target_transfer_tag, 893 bhsdo->bhsdo_initiator_task_tag, 894 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 895 #endif 896 if (bhsdo->bhsdo_target_transfer_tag == 897 cdw->cdw_target_transfer_tag) 898 break; 899 } 900 CFISCSI_SESSION_UNLOCK(cs); 901 if (cdw == NULL) { 902 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 903 "0x%x, not found; dropping connection", 904 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 905 icl_pdu_free(request); 906 cfiscsi_session_terminate(cs); 907 return; 908 } 909 910 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 911 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 912 "DataSN %u, while expected %u; dropping connection", 913 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 914 icl_pdu_free(request); 915 cfiscsi_session_terminate(cs); 916 return; 917 } 918 cdw->cdw_datasn++; 919 920 io = cdw->cdw_ctl_io; 921 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 922 ("CTL_FLAG_DATA_IN")); 923 924 done = cfiscsi_handle_data_segment(request, cdw); 925 if (done) { 926 CFISCSI_SESSION_LOCK(cs); 927 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 928 CFISCSI_SESSION_UNLOCK(cs); 929 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 930 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 931 uma_zfree(cfiscsi_data_wait_zone, cdw); 932 if (done) 933 io->scsiio.be_move_done(io); 934 else 935 cfiscsi_datamove_out(io); 936 } 937 938 icl_pdu_free(request); 939 } 940 941 static void 942 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 943 { 944 struct iscsi_bhs_logout_request *bhslr; 945 struct iscsi_bhs_logout_response *bhslr2; 946 struct icl_pdu *response; 947 struct cfiscsi_session *cs; 948 949 cs = PDU_SESSION(request); 950 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 951 switch (bhslr->bhslr_reason & 0x7f) { 952 case BHSLR_REASON_CLOSE_SESSION: 953 case BHSLR_REASON_CLOSE_CONNECTION: 954 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 955 if (response == NULL) { 956 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 957 icl_pdu_free(request); 958 cfiscsi_session_terminate(cs); 959 return; 960 } 961 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 962 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 963 bhslr2->bhslr_flags = 0x80; 964 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 965 bhslr2->bhslr_initiator_task_tag = 966 bhslr->bhslr_initiator_task_tag; 967 icl_pdu_free(request); 968 cfiscsi_pdu_queue(response); 969 cfiscsi_session_terminate(cs); 970 break; 971 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 972 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 973 if (response == NULL) { 974 CFISCSI_SESSION_WARN(cs, 975 "failed to allocate memory; dropping connection"); 976 icl_pdu_free(request); 977 cfiscsi_session_terminate(cs); 978 return; 979 } 980 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 981 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 982 bhslr2->bhslr_flags = 0x80; 983 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 984 bhslr2->bhslr_initiator_task_tag = 985 bhslr->bhslr_initiator_task_tag; 986 icl_pdu_free(request); 987 cfiscsi_pdu_queue(response); 988 break; 989 default: 990 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 991 bhslr->bhslr_reason); 992 icl_pdu_free(request); 993 cfiscsi_session_terminate(cs); 994 break; 995 } 996 } 997 998 static void 999 cfiscsi_callout(void *context) 1000 { 1001 struct icl_pdu *cp; 1002 struct iscsi_bhs_nop_in *bhsni; 1003 struct cfiscsi_session *cs; 1004 1005 cs = context; 1006 1007 if (cs->cs_terminating) 1008 return; 1009 1010 callout_schedule(&cs->cs_callout, 1 * hz); 1011 1012 atomic_add_int(&cs->cs_timeout, 1); 1013 1014 #ifdef ICL_KERNEL_PROXY 1015 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1016 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1017 CFISCSI_SESSION_WARN(cs, "login timed out after " 1018 "%d seconds; dropping connection", cs->cs_timeout); 1019 cfiscsi_session_terminate(cs); 1020 } 1021 return; 1022 } 1023 #endif 1024 1025 if (ping_timeout <= 0) { 1026 /* 1027 * Pings are disabled. Don't send NOP-In in this case; 1028 * user might have disabled pings to work around problems 1029 * with certain initiators that can't properly handle 1030 * NOP-In, such as iPXE. Reset the timeout, to avoid 1031 * triggering reconnection, should the user decide to 1032 * reenable them. 1033 */ 1034 cs->cs_timeout = 0; 1035 return; 1036 } 1037 1038 if (cs->cs_timeout >= ping_timeout) { 1039 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1040 "dropping connection", ping_timeout); 1041 cfiscsi_session_terminate(cs); 1042 return; 1043 } 1044 1045 /* 1046 * If the ping was reset less than one second ago - which means 1047 * that we've received some PDU during the last second - assume 1048 * the traffic flows correctly and don't bother sending a NOP-Out. 1049 * 1050 * (It's 2 - one for one second, and one for incrementing is_timeout 1051 * earlier in this routine.) 1052 */ 1053 if (cs->cs_timeout < 2) 1054 return; 1055 1056 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1057 if (cp == NULL) { 1058 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1059 return; 1060 } 1061 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1062 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1063 bhsni->bhsni_flags = 0x80; 1064 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1065 1066 cfiscsi_pdu_queue(cp); 1067 } 1068 1069 static void 1070 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1071 { 1072 struct cfiscsi_data_wait *cdw; 1073 union ctl_io *io; 1074 int error, last, wait; 1075 1076 if (cs->cs_target == NULL) 1077 return; /* No target yet, so nothing to do. */ 1078 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1079 ctl_zero_io(io); 1080 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1081 io->io_hdr.io_type = CTL_IO_TASK; 1082 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1083 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1084 io->io_hdr.nexus.targ_target.id = 0; 1085 io->io_hdr.nexus.targ_lun = 0; 1086 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1087 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1088 wait = cs->cs_outstanding_ctl_pdus; 1089 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1090 error = ctl_queue(io); 1091 if (error != CTL_RETVAL_COMPLETE) { 1092 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1093 refcount_release(&cs->cs_outstanding_ctl_pdus); 1094 ctl_free_io(io); 1095 } 1096 1097 CFISCSI_SESSION_LOCK(cs); 1098 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1099 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1100 CFISCSI_SESSION_UNLOCK(cs); 1101 /* 1102 * Set nonzero port status; this prevents backends from 1103 * assuming that the data transfer actually succeeded 1104 * and writing uninitialized data to disk. 1105 */ 1106 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1107 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1108 uma_zfree(cfiscsi_data_wait_zone, cdw); 1109 CFISCSI_SESSION_LOCK(cs); 1110 } 1111 CFISCSI_SESSION_UNLOCK(cs); 1112 1113 /* 1114 * Wait for CTL to terminate all the tasks. 1115 */ 1116 if (wait > 0) 1117 CFISCSI_SESSION_WARN(cs, 1118 "waiting for CTL to terminate %d tasks", wait); 1119 for (;;) { 1120 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1121 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1122 if (last != 0) 1123 break; 1124 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1125 0, "cfiscsi_terminate", hz / 100); 1126 } 1127 if (wait > 0) 1128 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1129 } 1130 1131 static void 1132 cfiscsi_maintenance_thread(void *arg) 1133 { 1134 struct cfiscsi_session *cs; 1135 1136 cs = arg; 1137 1138 for (;;) { 1139 CFISCSI_SESSION_LOCK(cs); 1140 if (cs->cs_terminating == false) 1141 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1142 CFISCSI_SESSION_UNLOCK(cs); 1143 1144 if (cs->cs_terminating) { 1145 1146 /* 1147 * We used to wait up to 30 seconds to deliver queued 1148 * PDUs to the initiator. We also tried hard to deliver 1149 * SCSI Responses for the aborted PDUs. We don't do 1150 * that anymore. We might need to revisit that. 1151 */ 1152 callout_drain(&cs->cs_callout); 1153 icl_conn_close(cs->cs_conn); 1154 1155 /* 1156 * At this point ICL receive thread is no longer 1157 * running; no new tasks can be queued. 1158 */ 1159 cfiscsi_session_terminate_tasks(cs); 1160 cfiscsi_session_delete(cs); 1161 kthread_exit(); 1162 return; 1163 } 1164 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1165 } 1166 } 1167 1168 static void 1169 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1170 { 1171 1172 if (cs->cs_terminating) 1173 return; 1174 cs->cs_terminating = true; 1175 cv_signal(&cs->cs_maintenance_cv); 1176 #ifdef ICL_KERNEL_PROXY 1177 cv_signal(&cs->cs_login_cv); 1178 #endif 1179 } 1180 1181 static int 1182 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1183 { 1184 struct cfiscsi_target *ct; 1185 char *name; 1186 int i; 1187 1188 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1189 1190 ct = cs->cs_target; 1191 name = strdup(cs->cs_initiator_id, M_CTL); 1192 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1193 if (i < 0) { 1194 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1195 i); 1196 cs->cs_ctl_initid = -1; 1197 return (1); 1198 } 1199 cs->cs_ctl_initid = i; 1200 #if 0 1201 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1202 #endif 1203 1204 return (0); 1205 } 1206 1207 static void 1208 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1209 { 1210 int error; 1211 1212 if (cs->cs_ctl_initid == -1) 1213 return; 1214 1215 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1216 if (error != 0) { 1217 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1218 error); 1219 } 1220 cs->cs_ctl_initid = -1; 1221 } 1222 1223 static struct cfiscsi_session * 1224 cfiscsi_session_new(struct cfiscsi_softc *softc) 1225 { 1226 struct cfiscsi_session *cs; 1227 int error; 1228 1229 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1230 if (cs == NULL) { 1231 CFISCSI_WARN("malloc failed"); 1232 return (NULL); 1233 } 1234 cs->cs_ctl_initid = -1; 1235 1236 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1237 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1238 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1239 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1240 #ifdef ICL_KERNEL_PROXY 1241 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1242 #endif 1243 1244 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1245 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1246 cs->cs_conn->ic_error = cfiscsi_error_callback; 1247 cs->cs_conn->ic_prv0 = cs; 1248 1249 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1250 if (error != 0) { 1251 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1252 free(cs, M_CFISCSI); 1253 return (NULL); 1254 } 1255 1256 mtx_lock(&softc->lock); 1257 cs->cs_id = ++softc->last_session_id; 1258 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1259 mtx_unlock(&softc->lock); 1260 1261 /* 1262 * Start pinging the initiator. 1263 */ 1264 callout_init(&cs->cs_callout, 1); 1265 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1266 1267 return (cs); 1268 } 1269 1270 static void 1271 cfiscsi_session_delete(struct cfiscsi_session *cs) 1272 { 1273 struct cfiscsi_softc *softc; 1274 1275 softc = &cfiscsi_softc; 1276 1277 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1278 ("destroying session with outstanding CTL pdus")); 1279 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1280 ("destroying session with non-empty queue")); 1281 1282 cfiscsi_session_unregister_initiator(cs); 1283 if (cs->cs_target != NULL) 1284 cfiscsi_target_release(cs->cs_target); 1285 icl_conn_close(cs->cs_conn); 1286 icl_conn_free(cs->cs_conn); 1287 1288 mtx_lock(&softc->lock); 1289 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1290 cv_signal(&softc->sessions_cv); 1291 mtx_unlock(&softc->lock); 1292 1293 free(cs, M_CFISCSI); 1294 } 1295 1296 int 1297 cfiscsi_init(void) 1298 { 1299 struct cfiscsi_softc *softc; 1300 int retval; 1301 1302 softc = &cfiscsi_softc; 1303 retval = 0; 1304 bzero(softc, sizeof(*softc)); 1305 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1306 1307 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1308 #ifdef ICL_KERNEL_PROXY 1309 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1310 #endif 1311 TAILQ_INIT(&softc->sessions); 1312 TAILQ_INIT(&softc->targets); 1313 1314 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1315 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1316 UMA_ALIGN_PTR, 0); 1317 1318 return (0); 1319 } 1320 1321 #ifdef ICL_KERNEL_PROXY 1322 static void 1323 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1324 { 1325 struct cfiscsi_session *cs; 1326 1327 cs = cfiscsi_session_new(&cfiscsi_softc); 1328 if (cs == NULL) { 1329 CFISCSI_WARN("failed to create session"); 1330 return; 1331 } 1332 1333 icl_conn_handoff_sock(cs->cs_conn, so); 1334 cs->cs_initiator_sa = sa; 1335 cs->cs_portal_id = portal_id; 1336 cs->cs_waiting_for_ctld = true; 1337 cv_signal(&cfiscsi_softc.accept_cv); 1338 } 1339 #endif 1340 1341 static void 1342 cfiscsi_online(void *arg) 1343 { 1344 struct cfiscsi_softc *softc; 1345 struct cfiscsi_target *ct; 1346 int online; 1347 1348 ct = (struct cfiscsi_target *)arg; 1349 softc = ct->ct_softc; 1350 1351 mtx_lock(&softc->lock); 1352 if (ct->ct_online) { 1353 mtx_unlock(&softc->lock); 1354 return; 1355 } 1356 ct->ct_online = 1; 1357 online = softc->online++; 1358 mtx_unlock(&softc->lock); 1359 if (online > 0) 1360 return; 1361 1362 #ifdef ICL_KERNEL_PROXY 1363 if (softc->listener != NULL) 1364 icl_listen_free(softc->listener); 1365 softc->listener = icl_listen_new(cfiscsi_accept); 1366 #endif 1367 } 1368 1369 static void 1370 cfiscsi_offline(void *arg) 1371 { 1372 struct cfiscsi_softc *softc; 1373 struct cfiscsi_target *ct; 1374 struct cfiscsi_session *cs; 1375 int online; 1376 1377 ct = (struct cfiscsi_target *)arg; 1378 softc = ct->ct_softc; 1379 1380 mtx_lock(&softc->lock); 1381 if (!ct->ct_online) { 1382 mtx_unlock(&softc->lock); 1383 return; 1384 } 1385 ct->ct_online = 0; 1386 online = --softc->online; 1387 1388 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1389 if (cs->cs_target == ct) 1390 cfiscsi_session_terminate(cs); 1391 } 1392 do { 1393 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1394 if (cs->cs_target == ct) 1395 break; 1396 } 1397 if (cs != NULL) 1398 cv_wait(&softc->sessions_cv, &softc->lock); 1399 } while (cs != NULL && ct->ct_online == 0); 1400 mtx_unlock(&softc->lock); 1401 if (online > 0) 1402 return; 1403 1404 #ifdef ICL_KERNEL_PROXY 1405 icl_listen_free(softc->listener); 1406 softc->listener = NULL; 1407 #endif 1408 } 1409 1410 static int 1411 cfiscsi_info(void *arg, struct sbuf *sb) 1412 { 1413 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1414 int retval; 1415 1416 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1417 ct->ct_state); 1418 return (retval); 1419 } 1420 1421 static void 1422 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1423 { 1424 struct cfiscsi_softc *softc; 1425 struct cfiscsi_session *cs, *cs2; 1426 struct cfiscsi_target *ct; 1427 struct ctl_iscsi_handoff_params *cihp; 1428 int error; 1429 1430 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1431 softc = &cfiscsi_softc; 1432 1433 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1434 cihp->initiator_name, cihp->initiator_addr, 1435 cihp->target_name); 1436 1437 ct = cfiscsi_target_find(softc, cihp->target_name); 1438 if (ct == NULL) { 1439 ci->status = CTL_ISCSI_ERROR; 1440 snprintf(ci->error_str, sizeof(ci->error_str), 1441 "%s: target not found", __func__); 1442 return; 1443 } 1444 1445 #ifdef ICL_KERNEL_PROXY 1446 if (cihp->socket > 0 && cihp->connection_id > 0) { 1447 snprintf(ci->error_str, sizeof(ci->error_str), 1448 "both socket and connection_id set"); 1449 ci->status = CTL_ISCSI_ERROR; 1450 cfiscsi_target_release(ct); 1451 return; 1452 } 1453 if (cihp->socket == 0) { 1454 mtx_lock(&cfiscsi_softc.lock); 1455 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1456 if (cs->cs_id == cihp->connection_id) 1457 break; 1458 } 1459 if (cs == NULL) { 1460 mtx_unlock(&cfiscsi_softc.lock); 1461 snprintf(ci->error_str, sizeof(ci->error_str), 1462 "connection not found"); 1463 ci->status = CTL_ISCSI_ERROR; 1464 cfiscsi_target_release(ct); 1465 return; 1466 } 1467 mtx_unlock(&cfiscsi_softc.lock); 1468 } else { 1469 #endif 1470 cs = cfiscsi_session_new(softc); 1471 if (cs == NULL) { 1472 ci->status = CTL_ISCSI_ERROR; 1473 snprintf(ci->error_str, sizeof(ci->error_str), 1474 "%s: cfiscsi_session_new failed", __func__); 1475 cfiscsi_target_release(ct); 1476 return; 1477 } 1478 #ifdef ICL_KERNEL_PROXY 1479 } 1480 #endif 1481 1482 /* 1483 * First PDU of Full Feature phase has the same CmdSN as the last 1484 * PDU from the Login Phase received from the initiator. Thus, 1485 * the -1 below. 1486 */ 1487 cs->cs_portal_group_tag = cihp->portal_group_tag; 1488 cs->cs_cmdsn = cihp->cmdsn; 1489 cs->cs_statsn = cihp->statsn; 1490 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1491 cs->cs_max_burst_length = cihp->max_burst_length; 1492 cs->cs_immediate_data = !!cihp->immediate_data; 1493 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1494 cs->cs_conn->ic_header_crc32c = true; 1495 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1496 cs->cs_conn->ic_data_crc32c = true; 1497 1498 strlcpy(cs->cs_initiator_name, 1499 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1500 strlcpy(cs->cs_initiator_addr, 1501 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1502 strlcpy(cs->cs_initiator_alias, 1503 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1504 memcpy(cs->cs_initiator_isid, 1505 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1506 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1507 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1508 cihp->initiator_isid[0], cihp->initiator_isid[1], 1509 cihp->initiator_isid[2], cihp->initiator_isid[3], 1510 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1511 1512 mtx_lock(&softc->lock); 1513 if (ct->ct_online == 0) { 1514 mtx_unlock(&softc->lock); 1515 cfiscsi_session_terminate(cs); 1516 cfiscsi_target_release(ct); 1517 ci->status = CTL_ISCSI_ERROR; 1518 snprintf(ci->error_str, sizeof(ci->error_str), 1519 "%s: port offline", __func__); 1520 return; 1521 } 1522 cs->cs_target = ct; 1523 mtx_unlock(&softc->lock); 1524 1525 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1526 restart: 1527 if (!cs->cs_terminating) { 1528 mtx_lock(&softc->lock); 1529 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1530 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1531 cs->cs_target == cs2->cs_target && 1532 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1533 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1534 cfiscsi_session_terminate(cs2); 1535 mtx_unlock(&softc->lock); 1536 pause("cfiscsi_reinstate", 1); 1537 goto restart; 1538 } 1539 } 1540 mtx_unlock(&softc->lock); 1541 } 1542 1543 /* 1544 * Register initiator with CTL. 1545 */ 1546 cfiscsi_session_register_initiator(cs); 1547 1548 #ifdef ICL_KERNEL_PROXY 1549 if (cihp->socket > 0) { 1550 #endif 1551 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1552 if (error != 0) { 1553 cfiscsi_session_terminate(cs); 1554 refcount_release(&cs->cs_outstanding_ctl_pdus); 1555 ci->status = CTL_ISCSI_ERROR; 1556 snprintf(ci->error_str, sizeof(ci->error_str), 1557 "%s: icl_conn_handoff failed with error %d", 1558 __func__, error); 1559 return; 1560 } 1561 #ifdef ICL_KERNEL_PROXY 1562 } 1563 #endif 1564 1565 #ifdef ICL_KERNEL_PROXY 1566 cs->cs_login_phase = false; 1567 1568 /* 1569 * First PDU of the Full Feature phase has likely already arrived. 1570 * We have to pick it up and execute properly. 1571 */ 1572 if (cs->cs_login_pdu != NULL) { 1573 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1574 cfiscsi_pdu_handle(cs->cs_login_pdu); 1575 cs->cs_login_pdu = NULL; 1576 } 1577 #endif 1578 1579 refcount_release(&cs->cs_outstanding_ctl_pdus); 1580 ci->status = CTL_ISCSI_OK; 1581 } 1582 1583 static void 1584 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1585 { 1586 struct ctl_iscsi_list_params *cilp; 1587 struct cfiscsi_session *cs; 1588 struct cfiscsi_softc *softc; 1589 struct sbuf *sb; 1590 int error; 1591 1592 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1593 softc = &cfiscsi_softc; 1594 1595 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1596 if (sb == NULL) { 1597 ci->status = CTL_ISCSI_ERROR; 1598 snprintf(ci->error_str, sizeof(ci->error_str), 1599 "Unable to allocate %d bytes for iSCSI session list", 1600 cilp->alloc_len); 1601 return; 1602 } 1603 1604 sbuf_printf(sb, "<ctlislist>\n"); 1605 mtx_lock(&softc->lock); 1606 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1607 #ifdef ICL_KERNEL_PROXY 1608 if (cs->cs_target == NULL) 1609 continue; 1610 #endif 1611 error = sbuf_printf(sb, "<connection id=\"%d\">" 1612 "<initiator>%s</initiator>" 1613 "<initiator_addr>%s</initiator_addr>" 1614 "<initiator_alias>%s</initiator_alias>" 1615 "<target>%s</target>" 1616 "<target_alias>%s</target_alias>" 1617 "<header_digest>%s</header_digest>" 1618 "<data_digest>%s</data_digest>" 1619 "<max_data_segment_length>%zd</max_data_segment_length>" 1620 "<immediate_data>%d</immediate_data>" 1621 "<iser>%d</iser>" 1622 "</connection>\n", 1623 cs->cs_id, 1624 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1625 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1626 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1627 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1628 cs->cs_max_data_segment_length, 1629 cs->cs_immediate_data, 1630 cs->cs_conn->ic_iser); 1631 if (error != 0) 1632 break; 1633 } 1634 mtx_unlock(&softc->lock); 1635 error = sbuf_printf(sb, "</ctlislist>\n"); 1636 if (error != 0) { 1637 sbuf_delete(sb); 1638 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1639 snprintf(ci->error_str, sizeof(ci->error_str), 1640 "Out of space, %d bytes is too small", cilp->alloc_len); 1641 return; 1642 } 1643 sbuf_finish(sb); 1644 1645 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1646 cilp->fill_len = sbuf_len(sb) + 1; 1647 ci->status = CTL_ISCSI_OK; 1648 sbuf_delete(sb); 1649 } 1650 1651 static void 1652 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1653 { 1654 struct icl_pdu *response; 1655 struct iscsi_bhs_asynchronous_message *bhsam; 1656 struct ctl_iscsi_terminate_params *citp; 1657 struct cfiscsi_session *cs; 1658 struct cfiscsi_softc *softc; 1659 int found = 0; 1660 1661 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1662 softc = &cfiscsi_softc; 1663 1664 mtx_lock(&softc->lock); 1665 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1666 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1667 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1668 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1669 continue; 1670 1671 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1672 if (response == NULL) { 1673 /* 1674 * Oh well. Just terminate the connection. 1675 */ 1676 } else { 1677 bhsam = (struct iscsi_bhs_asynchronous_message *) 1678 response->ip_bhs; 1679 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1680 bhsam->bhsam_flags = 0x80; 1681 bhsam->bhsam_0xffffffff = 0xffffffff; 1682 bhsam->bhsam_async_event = 1683 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1684 cfiscsi_pdu_queue(response); 1685 } 1686 cfiscsi_session_terminate(cs); 1687 found++; 1688 } 1689 mtx_unlock(&softc->lock); 1690 1691 if (found == 0) { 1692 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1693 snprintf(ci->error_str, sizeof(ci->error_str), 1694 "No matching connections found"); 1695 return; 1696 } 1697 1698 ci->status = CTL_ISCSI_OK; 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 #ifdef ICL_KERNEL_PROXY 1751 static void 1752 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1753 { 1754 struct ctl_iscsi_listen_params *cilp; 1755 struct sockaddr *sa; 1756 int error; 1757 1758 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1759 1760 if (cfiscsi_softc.listener == NULL) { 1761 CFISCSI_DEBUG("no listener"); 1762 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1763 ci->status = CTL_ISCSI_ERROR; 1764 return; 1765 } 1766 1767 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1768 if (error != 0) { 1769 CFISCSI_DEBUG("getsockaddr, error %d", error); 1770 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1771 ci->status = CTL_ISCSI_ERROR; 1772 return; 1773 } 1774 1775 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1776 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1777 if (error != 0) { 1778 free(sa, M_SONAME); 1779 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1780 snprintf(ci->error_str, sizeof(ci->error_str), 1781 "icl_listen_add failed, error %d", error); 1782 ci->status = CTL_ISCSI_ERROR; 1783 return; 1784 } 1785 1786 ci->status = CTL_ISCSI_OK; 1787 } 1788 1789 static void 1790 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1791 { 1792 struct ctl_iscsi_accept_params *ciap; 1793 struct cfiscsi_session *cs; 1794 int error; 1795 1796 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1797 1798 mtx_lock(&cfiscsi_softc.lock); 1799 for (;;) { 1800 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1801 if (cs->cs_waiting_for_ctld) 1802 break; 1803 } 1804 if (cs != NULL) 1805 break; 1806 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1807 if (error != 0) { 1808 mtx_unlock(&cfiscsi_softc.lock); 1809 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1810 ci->status = CTL_ISCSI_ERROR; 1811 return; 1812 } 1813 } 1814 mtx_unlock(&cfiscsi_softc.lock); 1815 1816 cs->cs_waiting_for_ctld = false; 1817 cs->cs_login_phase = true; 1818 1819 ciap->connection_id = cs->cs_id; 1820 ciap->portal_id = cs->cs_portal_id; 1821 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1822 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1823 cs->cs_initiator_sa->sa_len); 1824 if (error != 0) { 1825 snprintf(ci->error_str, sizeof(ci->error_str), 1826 "copyout failed with error %d", error); 1827 ci->status = CTL_ISCSI_ERROR; 1828 return; 1829 } 1830 1831 ci->status = CTL_ISCSI_OK; 1832 } 1833 1834 static void 1835 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1836 { 1837 struct ctl_iscsi_send_params *cisp; 1838 struct cfiscsi_session *cs; 1839 struct icl_pdu *ip; 1840 size_t datalen; 1841 void *data; 1842 int error; 1843 1844 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1845 1846 mtx_lock(&cfiscsi_softc.lock); 1847 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1848 if (cs->cs_id == cisp->connection_id) 1849 break; 1850 } 1851 if (cs == NULL) { 1852 mtx_unlock(&cfiscsi_softc.lock); 1853 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1854 ci->status = CTL_ISCSI_ERROR; 1855 return; 1856 } 1857 mtx_unlock(&cfiscsi_softc.lock); 1858 1859 #if 0 1860 if (cs->cs_login_phase == false) 1861 return (EBUSY); 1862 #endif 1863 1864 if (cs->cs_terminating) { 1865 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1866 ci->status = CTL_ISCSI_ERROR; 1867 return; 1868 } 1869 1870 datalen = cisp->data_segment_len; 1871 /* 1872 * XXX 1873 */ 1874 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1875 if (datalen > 65535) { 1876 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1877 ci->status = CTL_ISCSI_ERROR; 1878 return; 1879 } 1880 if (datalen > 0) { 1881 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1882 error = copyin(cisp->data_segment, data, datalen); 1883 if (error != 0) { 1884 free(data, M_CFISCSI); 1885 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1886 ci->status = CTL_ISCSI_ERROR; 1887 return; 1888 } 1889 } 1890 1891 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1892 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1893 if (datalen > 0) { 1894 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1895 free(data, M_CFISCSI); 1896 } 1897 CFISCSI_SESSION_LOCK(cs); 1898 icl_pdu_queue(ip); 1899 CFISCSI_SESSION_UNLOCK(cs); 1900 ci->status = CTL_ISCSI_OK; 1901 } 1902 1903 static void 1904 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1905 { 1906 struct ctl_iscsi_receive_params *cirp; 1907 struct cfiscsi_session *cs; 1908 struct icl_pdu *ip; 1909 void *data; 1910 int error; 1911 1912 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1913 1914 mtx_lock(&cfiscsi_softc.lock); 1915 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1916 if (cs->cs_id == cirp->connection_id) 1917 break; 1918 } 1919 if (cs == NULL) { 1920 mtx_unlock(&cfiscsi_softc.lock); 1921 snprintf(ci->error_str, sizeof(ci->error_str), 1922 "connection not found"); 1923 ci->status = CTL_ISCSI_ERROR; 1924 return; 1925 } 1926 mtx_unlock(&cfiscsi_softc.lock); 1927 1928 #if 0 1929 if (is->is_login_phase == false) 1930 return (EBUSY); 1931 #endif 1932 1933 CFISCSI_SESSION_LOCK(cs); 1934 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1935 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1936 if (error != 0) { 1937 CFISCSI_SESSION_UNLOCK(cs); 1938 snprintf(ci->error_str, sizeof(ci->error_str), 1939 "interrupted by signal"); 1940 ci->status = CTL_ISCSI_ERROR; 1941 return; 1942 } 1943 } 1944 1945 if (cs->cs_terminating) { 1946 CFISCSI_SESSION_UNLOCK(cs); 1947 snprintf(ci->error_str, sizeof(ci->error_str), 1948 "connection terminating"); 1949 ci->status = CTL_ISCSI_ERROR; 1950 return; 1951 } 1952 ip = cs->cs_login_pdu; 1953 cs->cs_login_pdu = NULL; 1954 CFISCSI_SESSION_UNLOCK(cs); 1955 1956 if (ip->ip_data_len > cirp->data_segment_len) { 1957 icl_pdu_free(ip); 1958 snprintf(ci->error_str, sizeof(ci->error_str), 1959 "data segment too big"); 1960 ci->status = CTL_ISCSI_ERROR; 1961 return; 1962 } 1963 1964 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1965 if (ip->ip_data_len > 0) { 1966 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1967 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1968 copyout(data, cirp->data_segment, ip->ip_data_len); 1969 free(data, M_CFISCSI); 1970 } 1971 1972 icl_pdu_free(ip); 1973 ci->status = CTL_ISCSI_OK; 1974 } 1975 1976 #endif /* !ICL_KERNEL_PROXY */ 1977 1978 static void 1979 cfiscsi_ioctl_port_create(struct ctl_req *req) 1980 { 1981 struct cfiscsi_target *ct; 1982 struct ctl_port *port; 1983 const char *target, *alias, *tag; 1984 struct scsi_vpd_id_descriptor *desc; 1985 ctl_options_t opts; 1986 int retval, len, idlen; 1987 1988 ctl_init_opts(&opts, req->num_args, req->kern_args); 1989 target = ctl_get_opt(&opts, "cfiscsi_target"); 1990 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1991 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1992 if (target == NULL || tag == NULL) { 1993 req->status = CTL_LUN_ERROR; 1994 snprintf(req->error_str, sizeof(req->error_str), 1995 "Missing required argument"); 1996 ctl_free_opts(&opts); 1997 return; 1998 } 1999 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 2000 if (ct == NULL) { 2001 req->status = CTL_LUN_ERROR; 2002 snprintf(req->error_str, sizeof(req->error_str), 2003 "failed to create target \"%s\"", target); 2004 ctl_free_opts(&opts); 2005 return; 2006 } 2007 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2008 req->status = CTL_LUN_ERROR; 2009 snprintf(req->error_str, sizeof(req->error_str), 2010 "target \"%s\" already exists", target); 2011 cfiscsi_target_release(ct); 2012 ctl_free_opts(&opts); 2013 return; 2014 } 2015 port = &ct->ct_port; 2016 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2017 goto done; 2018 2019 port->frontend = &cfiscsi_frontend; 2020 port->port_type = CTL_PORT_ISCSI; 2021 /* XXX KDM what should the real number be here? */ 2022 port->num_requested_ctl_io = 4096; 2023 port->port_name = "iscsi"; 2024 port->physical_port = strtoul(tag, NULL, 0); 2025 port->virtual_port = ct->ct_target_id; 2026 port->port_online = cfiscsi_online; 2027 port->port_offline = cfiscsi_offline; 2028 port->port_info = cfiscsi_info; 2029 port->onoff_arg = ct; 2030 port->lun_enable = cfiscsi_lun_enable; 2031 port->lun_disable = cfiscsi_lun_disable; 2032 port->lun_map = cfiscsi_lun_map; 2033 port->targ_lun_arg = ct; 2034 port->fe_datamove = cfiscsi_datamove; 2035 port->fe_done = cfiscsi_done; 2036 2037 /* XXX KDM what should we report here? */ 2038 /* XXX These should probably be fetched from CTL. */ 2039 port->max_targets = 1; 2040 port->max_target_id = 15; 2041 2042 port->options = opts; 2043 STAILQ_INIT(&opts); 2044 2045 /* Generate Port ID. */ 2046 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2047 idlen = roundup2(idlen, 4); 2048 len = sizeof(struct scsi_vpd_device_id) + idlen; 2049 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2050 M_CTL, M_WAITOK | M_ZERO); 2051 port->port_devid->len = len; 2052 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2053 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2054 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2055 SVPD_ID_TYPE_SCSI_NAME; 2056 desc->length = idlen; 2057 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2058 target, port->physical_port); 2059 2060 /* Generate Target ID. */ 2061 idlen = strlen(target) + 1; 2062 idlen = roundup2(idlen, 4); 2063 len = sizeof(struct scsi_vpd_device_id) + idlen; 2064 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2065 M_CTL, M_WAITOK | M_ZERO); 2066 port->target_devid->len = len; 2067 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2068 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2069 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2070 SVPD_ID_TYPE_SCSI_NAME; 2071 desc->length = idlen; 2072 strlcpy(desc->identifier, target, idlen); 2073 2074 retval = ctl_port_register(port); 2075 if (retval != 0) { 2076 ctl_free_opts(&port->options); 2077 cfiscsi_target_release(ct); 2078 free(port->port_devid, M_CFISCSI); 2079 free(port->target_devid, M_CFISCSI); 2080 req->status = CTL_LUN_ERROR; 2081 snprintf(req->error_str, sizeof(req->error_str), 2082 "ctl_frontend_register() failed with error %d", retval); 2083 return; 2084 } 2085 done: 2086 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2087 req->status = CTL_LUN_OK; 2088 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2089 sizeof(port->targ_port)); //XXX 2090 } 2091 2092 static void 2093 cfiscsi_ioctl_port_remove(struct ctl_req *req) 2094 { 2095 struct cfiscsi_target *ct; 2096 const char *target; 2097 ctl_options_t opts; 2098 2099 ctl_init_opts(&opts, req->num_args, req->kern_args); 2100 target = ctl_get_opt(&opts, "cfiscsi_target"); 2101 if (target == NULL) { 2102 ctl_free_opts(&opts); 2103 req->status = CTL_LUN_ERROR; 2104 snprintf(req->error_str, sizeof(req->error_str), 2105 "Missing required argument"); 2106 return; 2107 } 2108 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2109 if (ct == NULL) { 2110 ctl_free_opts(&opts); 2111 req->status = CTL_LUN_ERROR; 2112 snprintf(req->error_str, sizeof(req->error_str), 2113 "can't find target \"%s\"", target); 2114 return; 2115 } 2116 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2117 ctl_free_opts(&opts); 2118 req->status = CTL_LUN_ERROR; 2119 snprintf(req->error_str, sizeof(req->error_str), 2120 "target \"%s\" is already dying", target); 2121 return; 2122 } 2123 ctl_free_opts(&opts); 2124 2125 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2126 ctl_port_offline(&ct->ct_port); 2127 cfiscsi_target_release(ct); 2128 cfiscsi_target_release(ct); 2129 } 2130 2131 static int 2132 cfiscsi_ioctl(struct cdev *dev, 2133 u_long cmd, caddr_t addr, int flag, struct thread *td) 2134 { 2135 struct ctl_iscsi *ci; 2136 struct ctl_req *req; 2137 2138 if (cmd == CTL_PORT_REQ) { 2139 req = (struct ctl_req *)addr; 2140 switch (req->reqtype) { 2141 case CTL_REQ_CREATE: 2142 cfiscsi_ioctl_port_create(req); 2143 break; 2144 case CTL_REQ_REMOVE: 2145 cfiscsi_ioctl_port_remove(req); 2146 break; 2147 default: 2148 req->status = CTL_LUN_ERROR; 2149 snprintf(req->error_str, sizeof(req->error_str), 2150 "Unsupported request type %d", req->reqtype); 2151 } 2152 return (0); 2153 } 2154 2155 if (cmd != CTL_ISCSI) 2156 return (ENOTTY); 2157 2158 ci = (struct ctl_iscsi *)addr; 2159 switch (ci->type) { 2160 case CTL_ISCSI_HANDOFF: 2161 cfiscsi_ioctl_handoff(ci); 2162 break; 2163 case CTL_ISCSI_LIST: 2164 cfiscsi_ioctl_list(ci); 2165 break; 2166 case CTL_ISCSI_TERMINATE: 2167 cfiscsi_ioctl_terminate(ci); 2168 break; 2169 case CTL_ISCSI_LOGOUT: 2170 cfiscsi_ioctl_logout(ci); 2171 break; 2172 #ifdef ICL_KERNEL_PROXY 2173 case CTL_ISCSI_LISTEN: 2174 cfiscsi_ioctl_listen(ci); 2175 break; 2176 case CTL_ISCSI_ACCEPT: 2177 cfiscsi_ioctl_accept(ci); 2178 break; 2179 case CTL_ISCSI_SEND: 2180 cfiscsi_ioctl_send(ci); 2181 break; 2182 case CTL_ISCSI_RECEIVE: 2183 cfiscsi_ioctl_receive(ci); 2184 break; 2185 #else 2186 case CTL_ISCSI_LISTEN: 2187 case CTL_ISCSI_ACCEPT: 2188 case CTL_ISCSI_SEND: 2189 case CTL_ISCSI_RECEIVE: 2190 ci->status = CTL_ISCSI_ERROR; 2191 snprintf(ci->error_str, sizeof(ci->error_str), 2192 "%s: CTL compiled without ICL_KERNEL_PROXY", 2193 __func__); 2194 break; 2195 #endif /* !ICL_KERNEL_PROXY */ 2196 default: 2197 ci->status = CTL_ISCSI_ERROR; 2198 snprintf(ci->error_str, sizeof(ci->error_str), 2199 "%s: invalid iSCSI request type %d", __func__, ci->type); 2200 break; 2201 } 2202 2203 return (0); 2204 } 2205 2206 static void 2207 cfiscsi_target_hold(struct cfiscsi_target *ct) 2208 { 2209 2210 refcount_acquire(&ct->ct_refcount); 2211 } 2212 2213 static void 2214 cfiscsi_target_release(struct cfiscsi_target *ct) 2215 { 2216 struct cfiscsi_softc *softc; 2217 2218 softc = ct->ct_softc; 2219 mtx_lock(&softc->lock); 2220 if (refcount_release(&ct->ct_refcount)) { 2221 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2222 mtx_unlock(&softc->lock); 2223 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2224 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2225 if (ctl_port_deregister(&ct->ct_port) != 0) 2226 printf("%s: ctl_port_deregister() failed\n", 2227 __func__); 2228 } 2229 free(ct, M_CFISCSI); 2230 2231 return; 2232 } 2233 mtx_unlock(&softc->lock); 2234 } 2235 2236 static struct cfiscsi_target * 2237 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2238 { 2239 struct cfiscsi_target *ct; 2240 2241 mtx_lock(&softc->lock); 2242 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2243 if (strcmp(name, ct->ct_name) != 0 || 2244 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2245 continue; 2246 cfiscsi_target_hold(ct); 2247 mtx_unlock(&softc->lock); 2248 return (ct); 2249 } 2250 mtx_unlock(&softc->lock); 2251 2252 return (NULL); 2253 } 2254 2255 static struct cfiscsi_target * 2256 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2257 const char *alias) 2258 { 2259 struct cfiscsi_target *ct, *newct; 2260 int i; 2261 2262 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2263 return (NULL); 2264 2265 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2266 2267 mtx_lock(&softc->lock); 2268 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2269 if (strcmp(name, ct->ct_name) != 0 || 2270 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2271 continue; 2272 cfiscsi_target_hold(ct); 2273 mtx_unlock(&softc->lock); 2274 free(newct, M_CFISCSI); 2275 return (ct); 2276 } 2277 2278 for (i = 0; i < CTL_MAX_LUNS; i++) 2279 newct->ct_luns[i] = UINT32_MAX; 2280 2281 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2282 if (alias != NULL) 2283 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2284 refcount_init(&newct->ct_refcount, 1); 2285 newct->ct_softc = softc; 2286 if (TAILQ_EMPTY(&softc->targets)) 2287 softc->last_target_id = 0; 2288 newct->ct_target_id = ++softc->last_target_id; 2289 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2290 mtx_unlock(&softc->lock); 2291 2292 return (newct); 2293 } 2294 2295 /* 2296 * Takes LUN from the target space and returns LUN from the CTL space. 2297 */ 2298 static uint32_t 2299 cfiscsi_lun_map(void *arg, uint32_t lun) 2300 { 2301 struct cfiscsi_target *ct = arg; 2302 2303 if (lun >= CTL_MAX_LUNS) { 2304 CFISCSI_DEBUG("requested lun number %d is higher " 2305 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2306 return (UINT32_MAX); 2307 } 2308 return (ct->ct_luns[lun]); 2309 } 2310 2311 static int 2312 cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2313 unsigned long lun_id, unsigned long ctl_lun_id) 2314 { 2315 2316 if (lun_id >= CTL_MAX_LUNS) { 2317 CFISCSI_WARN("requested lun number %ld is higher " 2318 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2319 return (-1); 2320 } 2321 2322 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2323 /* 2324 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2325 * when the LUN is created, and a second time just before 2326 * the port is brought online; don't emit warnings 2327 * for that case. 2328 */ 2329 if (ct->ct_luns[lun_id] == ctl_lun_id) 2330 return (0); 2331 CFISCSI_WARN("lun %ld already allocated", lun_id); 2332 return (-1); 2333 } 2334 2335 #if 0 2336 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2337 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2338 #endif 2339 2340 ct->ct_luns[lun_id] = ctl_lun_id; 2341 2342 return (0); 2343 } 2344 2345 static int 2346 cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2347 { 2348 struct cfiscsi_softc *softc; 2349 struct cfiscsi_target *ct; 2350 const char *target = NULL; 2351 const char *lun = NULL; 2352 unsigned long tmp; 2353 2354 ct = (struct cfiscsi_target *)arg; 2355 softc = ct->ct_softc; 2356 2357 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2358 "cfiscsi_target"); 2359 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2360 "cfiscsi_lun"); 2361 2362 if (target == NULL && lun == NULL) 2363 return (0); 2364 2365 if (target == NULL || lun == NULL) { 2366 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2367 "cfiscsi_lun, or the other way around; ignoring"); 2368 return (0); 2369 } 2370 2371 if (strcmp(target, ct->ct_name) != 0) 2372 return (0); 2373 2374 tmp = strtoul(lun, NULL, 10); 2375 cfiscsi_target_set_lun(ct, tmp, lun_id); 2376 return (0); 2377 } 2378 2379 static int 2380 cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2381 { 2382 struct cfiscsi_softc *softc; 2383 struct cfiscsi_target *ct; 2384 int i; 2385 2386 ct = (struct cfiscsi_target *)arg; 2387 softc = ct->ct_softc; 2388 2389 mtx_lock(&softc->lock); 2390 for (i = 0; i < CTL_MAX_LUNS; i++) { 2391 if (ct->ct_luns[i] != lun_id) 2392 continue; 2393 ct->ct_luns[i] = UINT32_MAX; 2394 break; 2395 } 2396 mtx_unlock(&softc->lock); 2397 return (0); 2398 } 2399 2400 static void 2401 cfiscsi_datamove_in(union ctl_io *io) 2402 { 2403 struct cfiscsi_session *cs; 2404 struct icl_pdu *request, *response; 2405 const struct iscsi_bhs_scsi_command *bhssc; 2406 struct iscsi_bhs_data_in *bhsdi; 2407 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2408 size_t len, expected_len, sg_len, buffer_offset; 2409 const char *sg_addr; 2410 int ctl_sg_count, error, i; 2411 2412 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2413 cs = PDU_SESSION(request); 2414 2415 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2416 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2417 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2418 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2419 2420 if (io->scsiio.kern_sg_entries > 0) { 2421 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2422 ctl_sg_count = io->scsiio.kern_sg_entries; 2423 } else { 2424 ctl_sglist = &ctl_sg_entry; 2425 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2426 ctl_sglist->len = io->scsiio.kern_data_len; 2427 ctl_sg_count = 1; 2428 } 2429 2430 /* 2431 * This is the total amount of data to be transferred within the current 2432 * SCSI command. We need to record it so that we can properly report 2433 * underflow/underflow. 2434 */ 2435 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2436 2437 /* 2438 * This is the offset within the current SCSI command; for the first 2439 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2440 * it will be the sum of lengths of previous ones. 2441 */ 2442 buffer_offset = io->scsiio.kern_rel_offset; 2443 2444 /* 2445 * This is the transfer length expected by the initiator. In theory, 2446 * it could be different from the correct amount of data from the SCSI 2447 * point of view, even if that doesn't make any sense. 2448 */ 2449 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2450 #if 0 2451 if (expected_len != io->scsiio.kern_total_len) { 2452 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2453 "actual length %zd", expected_len, 2454 (size_t)io->scsiio.kern_total_len); 2455 } 2456 #endif 2457 2458 if (buffer_offset >= expected_len) { 2459 #if 0 2460 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2461 "already sent the expected len", buffer_offset); 2462 #endif 2463 io->scsiio.be_move_done(io); 2464 return; 2465 } 2466 2467 i = 0; 2468 sg_addr = NULL; 2469 sg_len = 0; 2470 response = NULL; 2471 bhsdi = NULL; 2472 for (;;) { 2473 if (response == NULL) { 2474 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2475 if (response == NULL) { 2476 CFISCSI_SESSION_WARN(cs, "failed to " 2477 "allocate memory; dropping connection"); 2478 ctl_set_busy(&io->scsiio); 2479 io->scsiio.be_move_done(io); 2480 cfiscsi_session_terminate(cs); 2481 return; 2482 } 2483 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2484 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2485 bhsdi->bhsdi_initiator_task_tag = 2486 bhssc->bhssc_initiator_task_tag; 2487 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2488 PDU_EXPDATASN(request)++; 2489 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2490 } 2491 2492 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2493 if (sg_len == 0) { 2494 sg_addr = ctl_sglist[i].addr; 2495 sg_len = ctl_sglist[i].len; 2496 KASSERT(sg_len > 0, ("sg_len <= 0")); 2497 } 2498 2499 len = sg_len; 2500 2501 /* 2502 * Truncate to maximum data segment length. 2503 */ 2504 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2505 ("ip_data_len %zd >= max_data_segment_length %zd", 2506 response->ip_data_len, cs->cs_max_data_segment_length)); 2507 if (response->ip_data_len + len > 2508 cs->cs_max_data_segment_length) { 2509 len = cs->cs_max_data_segment_length - 2510 response->ip_data_len; 2511 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2512 len, sg_len)); 2513 } 2514 2515 /* 2516 * Truncate to expected data transfer length. 2517 */ 2518 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2519 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2520 buffer_offset, response->ip_data_len, expected_len)); 2521 if (buffer_offset + response->ip_data_len + len > expected_len) { 2522 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2523 "to expected data transfer length %zd", 2524 buffer_offset + response->ip_data_len + len, expected_len); 2525 len = expected_len - (buffer_offset + response->ip_data_len); 2526 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2527 len, sg_len)); 2528 } 2529 2530 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2531 if (error != 0) { 2532 CFISCSI_SESSION_WARN(cs, "failed to " 2533 "allocate memory; dropping connection"); 2534 icl_pdu_free(response); 2535 ctl_set_busy(&io->scsiio); 2536 io->scsiio.be_move_done(io); 2537 cfiscsi_session_terminate(cs); 2538 return; 2539 } 2540 sg_addr += len; 2541 sg_len -= len; 2542 2543 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2544 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2545 buffer_offset, response->ip_data_len, expected_len)); 2546 if (buffer_offset + response->ip_data_len == expected_len) { 2547 /* 2548 * Already have the amount of data the initiator wanted. 2549 */ 2550 break; 2551 } 2552 2553 if (sg_len == 0) { 2554 /* 2555 * End of scatter-gather segment; 2556 * proceed to the next one... 2557 */ 2558 if (i == ctl_sg_count - 1) { 2559 /* 2560 * ... unless this was the last one. 2561 */ 2562 break; 2563 } 2564 i++; 2565 } 2566 2567 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2568 /* 2569 * Can't stuff more data into the current PDU; 2570 * queue it. Note that's not enough to check 2571 * for kern_data_resid == 0 instead; there 2572 * may be several Data-In PDUs for the final 2573 * call to cfiscsi_datamove(), and we want 2574 * to set the F flag only on the last of them. 2575 */ 2576 buffer_offset += response->ip_data_len; 2577 if (buffer_offset == io->scsiio.kern_total_len || 2578 buffer_offset == expected_len) { 2579 buffer_offset -= response->ip_data_len; 2580 break; 2581 } 2582 cfiscsi_pdu_queue(response); 2583 response = NULL; 2584 bhsdi = NULL; 2585 } 2586 } 2587 if (response != NULL) { 2588 buffer_offset += response->ip_data_len; 2589 if (buffer_offset == io->scsiio.kern_total_len || 2590 buffer_offset == expected_len) { 2591 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2592 if (io->io_hdr.status == CTL_SUCCESS) { 2593 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2594 if (PDU_TOTAL_TRANSFER_LEN(request) < 2595 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2596 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2597 bhsdi->bhsdi_residual_count = 2598 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2599 PDU_TOTAL_TRANSFER_LEN(request)); 2600 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2601 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2602 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2603 bhsdi->bhsdi_residual_count = 2604 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2605 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2606 } 2607 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2608 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2609 } 2610 } 2611 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2612 cfiscsi_pdu_queue(response); 2613 } 2614 2615 io->scsiio.be_move_done(io); 2616 } 2617 2618 static void 2619 cfiscsi_datamove_out(union ctl_io *io) 2620 { 2621 struct cfiscsi_session *cs; 2622 struct icl_pdu *request, *response; 2623 const struct iscsi_bhs_scsi_command *bhssc; 2624 struct iscsi_bhs_r2t *bhsr2t; 2625 struct cfiscsi_data_wait *cdw; 2626 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2627 uint32_t expected_len, r2t_off, r2t_len; 2628 uint32_t target_transfer_tag; 2629 bool done; 2630 2631 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2632 cs = PDU_SESSION(request); 2633 2634 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2635 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2636 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2637 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2638 2639 /* 2640 * We need to record it so that we can properly report 2641 * underflow/underflow. 2642 */ 2643 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2644 2645 /* 2646 * Report write underflow as error since CTL and backends don't 2647 * really support it, and SCSI does not tell how to do it right. 2648 */ 2649 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2650 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2651 expected_len) { 2652 io->scsiio.io_hdr.port_status = 43; 2653 io->scsiio.be_move_done(io); 2654 return; 2655 } 2656 2657 target_transfer_tag = 2658 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2659 2660 #if 0 2661 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2662 "task tag 0x%x, target transfer tag 0x%x", 2663 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2664 #endif 2665 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2666 if (cdw == NULL) { 2667 CFISCSI_SESSION_WARN(cs, "failed to " 2668 "allocate memory; dropping connection"); 2669 ctl_set_busy(&io->scsiio); 2670 io->scsiio.be_move_done(io); 2671 cfiscsi_session_terminate(cs); 2672 return; 2673 } 2674 cdw->cdw_ctl_io = io; 2675 cdw->cdw_target_transfer_tag = target_transfer_tag; 2676 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2677 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2678 cdw->cdw_datasn = 0; 2679 2680 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2681 if (io->scsiio.kern_sg_entries > 0) { 2682 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2683 } else { 2684 ctl_sglist = &ctl_sg_entry; 2685 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2686 ctl_sglist->len = io->scsiio.kern_data_len; 2687 } 2688 cdw->cdw_sg_index = 0; 2689 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2690 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2691 r2t_off = io->scsiio.ext_data_filled; 2692 while (r2t_off > 0) { 2693 if (r2t_off >= cdw->cdw_sg_len) { 2694 r2t_off -= cdw->cdw_sg_len; 2695 cdw->cdw_sg_index++; 2696 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2697 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2698 continue; 2699 } 2700 cdw->cdw_sg_addr += r2t_off; 2701 cdw->cdw_sg_len -= r2t_off; 2702 r2t_off = 0; 2703 } 2704 2705 if (cs->cs_immediate_data && 2706 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2707 icl_pdu_data_segment_length(request)) { 2708 done = cfiscsi_handle_data_segment(request, cdw); 2709 if (done) { 2710 uma_zfree(cfiscsi_data_wait_zone, cdw); 2711 io->scsiio.be_move_done(io); 2712 return; 2713 } 2714 } 2715 2716 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2717 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2718 cs->cs_max_burst_length); 2719 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2720 2721 CFISCSI_SESSION_LOCK(cs); 2722 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2723 CFISCSI_SESSION_UNLOCK(cs); 2724 2725 /* 2726 * XXX: We should limit the number of outstanding R2T PDUs 2727 * per task to MaxOutstandingR2T. 2728 */ 2729 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2730 if (response == NULL) { 2731 CFISCSI_SESSION_WARN(cs, "failed to " 2732 "allocate memory; dropping connection"); 2733 ctl_set_busy(&io->scsiio); 2734 io->scsiio.be_move_done(io); 2735 cfiscsi_session_terminate(cs); 2736 return; 2737 } 2738 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2739 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2740 bhsr2t->bhsr2t_flags = 0x80; 2741 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2742 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2743 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2744 /* 2745 * XXX: Here we assume that cfiscsi_datamove() won't ever 2746 * be running concurrently on several CPUs for a given 2747 * command. 2748 */ 2749 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2750 PDU_R2TSN(request)++; 2751 /* 2752 * This is the offset within the current SCSI command; 2753 * i.e. for the first call of datamove(), it will be 0, 2754 * and for subsequent ones it will be the sum of lengths 2755 * of previous ones. 2756 * 2757 * The ext_data_filled is to account for unsolicited 2758 * (immediate) data that might have already arrived. 2759 */ 2760 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2761 /* 2762 * This is the total length (sum of S/G lengths) this call 2763 * to cfiscsi_datamove() is supposed to handle, limited by 2764 * MaxBurstLength. 2765 */ 2766 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2767 cfiscsi_pdu_queue(response); 2768 } 2769 2770 static void 2771 cfiscsi_datamove(union ctl_io *io) 2772 { 2773 2774 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2775 cfiscsi_datamove_in(io); 2776 else { 2777 /* We hadn't received anything during this datamove yet. */ 2778 io->scsiio.ext_data_filled = 0; 2779 cfiscsi_datamove_out(io); 2780 } 2781 } 2782 2783 static void 2784 cfiscsi_scsi_command_done(union ctl_io *io) 2785 { 2786 struct icl_pdu *request, *response; 2787 struct iscsi_bhs_scsi_command *bhssc; 2788 struct iscsi_bhs_scsi_response *bhssr; 2789 #ifdef DIAGNOSTIC 2790 struct cfiscsi_data_wait *cdw; 2791 #endif 2792 struct cfiscsi_session *cs; 2793 uint16_t sense_length; 2794 2795 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2796 cs = PDU_SESSION(request); 2797 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2798 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2799 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2800 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2801 2802 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2803 // bhssc->bhssc_initiator_task_tag); 2804 2805 #ifdef DIAGNOSTIC 2806 CFISCSI_SESSION_LOCK(cs); 2807 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2808 KASSERT(bhssc->bhssc_initiator_task_tag != 2809 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2810 CFISCSI_SESSION_UNLOCK(cs); 2811 #endif 2812 2813 /* 2814 * Do not return status for aborted commands. 2815 * There are exceptions, but none supported by CTL yet. 2816 */ 2817 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2818 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2819 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2820 ctl_free_io(io); 2821 icl_pdu_free(request); 2822 return; 2823 } 2824 2825 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2826 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2827 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2828 bhssr->bhssr_flags = 0x80; 2829 /* 2830 * XXX: We don't deal with bidirectional under/overflows; 2831 * does anything actually support those? 2832 */ 2833 if (PDU_TOTAL_TRANSFER_LEN(request) < 2834 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2835 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2836 bhssr->bhssr_residual_count = 2837 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2838 PDU_TOTAL_TRANSFER_LEN(request)); 2839 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2840 // ntohl(bhssr->bhssr_residual_count)); 2841 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2842 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2843 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2844 bhssr->bhssr_residual_count = 2845 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2846 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2847 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2848 // ntohl(bhssr->bhssr_residual_count)); 2849 } 2850 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2851 bhssr->bhssr_status = io->scsiio.scsi_status; 2852 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2853 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2854 2855 if (io->scsiio.sense_len > 0) { 2856 #if 0 2857 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2858 io->scsiio.sense_len); 2859 #endif 2860 sense_length = htons(io->scsiio.sense_len); 2861 icl_pdu_append_data(response, 2862 &sense_length, sizeof(sense_length), M_WAITOK); 2863 icl_pdu_append_data(response, 2864 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2865 } 2866 2867 ctl_free_io(io); 2868 icl_pdu_free(request); 2869 cfiscsi_pdu_queue(response); 2870 } 2871 2872 static void 2873 cfiscsi_task_management_done(union ctl_io *io) 2874 { 2875 struct icl_pdu *request, *response; 2876 struct iscsi_bhs_task_management_request *bhstmr; 2877 struct iscsi_bhs_task_management_response *bhstmr2; 2878 struct cfiscsi_data_wait *cdw, *tmpcdw; 2879 struct cfiscsi_session *cs; 2880 2881 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2882 cs = PDU_SESSION(request); 2883 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2884 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2885 ISCSI_BHS_OPCODE_TASK_REQUEST, 2886 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2887 2888 #if 0 2889 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2890 bhstmr->bhstmr_initiator_task_tag, 2891 bhstmr->bhstmr_referenced_task_tag); 2892 #endif 2893 2894 if ((bhstmr->bhstmr_function & ~0x80) == 2895 BHSTMR_FUNCTION_ABORT_TASK) { 2896 /* 2897 * Make sure we no longer wait for Data-Out for this command. 2898 */ 2899 CFISCSI_SESSION_LOCK(cs); 2900 TAILQ_FOREACH_SAFE(cdw, 2901 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2902 if (bhstmr->bhstmr_referenced_task_tag != 2903 cdw->cdw_initiator_task_tag) 2904 continue; 2905 2906 #if 0 2907 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2908 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2909 #endif 2910 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2911 cdw, cdw_next); 2912 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2913 uma_zfree(cfiscsi_data_wait_zone, cdw); 2914 } 2915 CFISCSI_SESSION_UNLOCK(cs); 2916 } 2917 2918 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2919 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2920 response->ip_bhs; 2921 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2922 bhstmr2->bhstmr_flags = 0x80; 2923 if (io->io_hdr.status == CTL_SUCCESS) { 2924 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2925 } else { 2926 /* 2927 * XXX: How to figure out what exactly went wrong? iSCSI spec 2928 * expects us to provide detailed error, e.g. "Task does 2929 * not exist" or "LUN does not exist". 2930 */ 2931 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2932 bhstmr2->bhstmr_response = 2933 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2934 } 2935 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2936 2937 ctl_free_io(io); 2938 icl_pdu_free(request); 2939 cfiscsi_pdu_queue(response); 2940 } 2941 2942 static void 2943 cfiscsi_done(union ctl_io *io) 2944 { 2945 struct icl_pdu *request; 2946 struct cfiscsi_session *cs; 2947 2948 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2949 ("invalid CTL status %#x", io->io_hdr.status)); 2950 2951 if (io->io_hdr.io_type == CTL_IO_TASK && 2952 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2953 /* 2954 * Implicit task termination has just completed; nothing to do. 2955 */ 2956 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2957 cs->cs_tasks_aborted = true; 2958 refcount_release(&cs->cs_outstanding_ctl_pdus); 2959 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2960 ctl_free_io(io); 2961 return; 2962 } 2963 2964 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2965 cs = PDU_SESSION(request); 2966 refcount_release(&cs->cs_outstanding_ctl_pdus); 2967 2968 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2969 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2970 cfiscsi_scsi_command_done(io); 2971 break; 2972 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2973 cfiscsi_task_management_done(io); 2974 break; 2975 default: 2976 panic("cfiscsi_done called with wrong opcode 0x%x", 2977 request->ip_bhs->bhs_opcode); 2978 } 2979 } 2980