ctl_frontend_iscsi.c revision 287764
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: head/sys/cam/ctl/ctl_frontend_iscsi.c 287764 2015-09-13 20:22:18Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 287764 2015-09-13 20:22:18Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capsicum.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_debug.h> 65#include <cam/ctl/ctl_ha.h> 66#include <cam/ctl/ctl_ioctl.h> 67#include <cam/ctl/ctl_private.h> 68 69#include <dev/iscsi/icl.h> 70#include <dev/iscsi/icl_wrappers.h> 71#include <dev/iscsi/iscsi_proto.h> 72#include <cam/ctl/ctl_frontend_iscsi.h> 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 1; 88SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 89 &debug, 1, "Enable debug messages"); 90static int ping_timeout = 5; 91SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 92 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 93static int login_timeout = 60; 94SYSCTL_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"); 96static int maxcmdsn_delta = 256; 97SYSCTL_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 145int cfiscsi_init(void); 146static void cfiscsi_online(void *arg); 147static void cfiscsi_offline(void *arg); 148static int cfiscsi_info(void *arg, struct sbuf *sb); 149static int cfiscsi_ioctl(struct cdev *dev, 150 u_long cmd, caddr_t addr, int flag, struct thread *td); 151static void cfiscsi_datamove(union ctl_io *io); 152static void cfiscsi_datamove_in(union ctl_io *io); 153static void cfiscsi_datamove_out(union ctl_io *io); 154static void cfiscsi_done(union ctl_io *io); 155static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 156static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 157static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 158static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 159static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 160static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 161static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 162static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 163 struct cfiscsi_session *cs, union ctl_io *io, 164 uint32_t initiator_task_tag, 165 uint32_t *target_transfer_tagp); 166static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 167 struct cfiscsi_data_wait *cdw); 168static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 169 *softc, const char *name, uint16_t tag); 170static struct cfiscsi_target *cfiscsi_target_find_or_create( 171 struct cfiscsi_softc *softc, const char *name, const char *alias, 172 uint16_t tag); 173static void cfiscsi_target_release(struct cfiscsi_target *ct); 174static void cfiscsi_session_delete(struct cfiscsi_session *cs); 175 176static struct cfiscsi_softc cfiscsi_softc; 177extern struct ctl_softc *control_softc; 178 179static struct ctl_frontend cfiscsi_frontend = 180{ 181 .name = "iscsi", 182 .init = cfiscsi_init, 183 .ioctl = cfiscsi_ioctl, 184}; 185CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 186MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 187 188static struct icl_pdu * 189cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 190{ 191 192 return (icl_pdu_new(request->ip_conn, flags)); 193} 194 195static bool 196cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 197{ 198 const struct iscsi_bhs_scsi_command *bhssc; 199 struct cfiscsi_session *cs; 200 uint32_t cmdsn, expstatsn; 201 202 cs = PDU_SESSION(request); 203 204 /* 205 * Every incoming PDU - not just NOP-Out - resets the ping timer. 206 * The purpose of the timeout is to reset the connection when it stalls; 207 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 208 * in some queue. 209 * 210 * XXX: Locking? 211 */ 212 cs->cs_timeout = 0; 213 214 /* 215 * Data-Out PDUs don't contain CmdSN. 216 */ 217 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 218 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 219 return (false); 220 221 /* 222 * We're only using fields common for all the request 223 * (initiator -> target) PDUs. 224 */ 225 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 226 cmdsn = ntohl(bhssc->bhssc_cmdsn); 227 expstatsn = ntohl(bhssc->bhssc_expstatsn); 228 229 CFISCSI_SESSION_LOCK(cs); 230#if 0 231 if (expstatsn != cs->cs_statsn) { 232 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 233 "while current StatSN is %d", expstatsn, 234 cs->cs_statsn); 235 } 236#endif 237 238 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 239 /* 240 * The target MUST silently ignore any non-immediate command 241 * outside of this range. 242 */ 243 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 244 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 245 CFISCSI_SESSION_UNLOCK(cs); 246 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 247 "while expected %u", cmdsn, cs->cs_cmdsn); 248 return (true); 249 } 250 251 /* 252 * We don't support multiple connections now, so any 253 * discontinuity in CmdSN means lost PDUs. Since we don't 254 * support PDU retransmission -- terminate the connection. 255 */ 256 if (cmdsn != cs->cs_cmdsn) { 257 CFISCSI_SESSION_UNLOCK(cs); 258 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 259 "while expected %u; dropping connection", 260 cmdsn, cs->cs_cmdsn); 261 cfiscsi_session_terminate(cs); 262 return (true); 263 } 264 cs->cs_cmdsn++; 265 } 266 267 CFISCSI_SESSION_UNLOCK(cs); 268 269 return (false); 270} 271 272static void 273cfiscsi_pdu_handle(struct icl_pdu *request) 274{ 275 struct cfiscsi_session *cs; 276 bool ignore; 277 278 cs = PDU_SESSION(request); 279 280 ignore = cfiscsi_pdu_update_cmdsn(request); 281 if (ignore) { 282 icl_pdu_free(request); 283 return; 284 } 285 286 /* 287 * Handle the PDU; this includes e.g. receiving the remaining 288 * part of PDU and submitting the SCSI command to CTL 289 * or queueing a reply. The handling routine is responsible 290 * for freeing the PDU when it's no longer needed. 291 */ 292 switch (request->ip_bhs->bhs_opcode & 293 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 294 case ISCSI_BHS_OPCODE_NOP_OUT: 295 cfiscsi_pdu_handle_nop_out(request); 296 break; 297 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 298 cfiscsi_pdu_handle_scsi_command(request); 299 break; 300 case ISCSI_BHS_OPCODE_TASK_REQUEST: 301 cfiscsi_pdu_handle_task_request(request); 302 break; 303 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 304 cfiscsi_pdu_handle_data_out(request); 305 break; 306 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 307 cfiscsi_pdu_handle_logout_request(request); 308 break; 309 default: 310 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 311 "opcode 0x%x; dropping connection", 312 request->ip_bhs->bhs_opcode); 313 icl_pdu_free(request); 314 cfiscsi_session_terminate(cs); 315 } 316 317} 318 319static void 320cfiscsi_receive_callback(struct icl_pdu *request) 321{ 322 struct cfiscsi_session *cs; 323 324 cs = PDU_SESSION(request); 325 326#ifdef ICL_KERNEL_PROXY 327 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 328 if (cs->cs_login_pdu == NULL) 329 cs->cs_login_pdu = request; 330 else 331 icl_pdu_free(request); 332 cv_signal(&cs->cs_login_cv); 333 return; 334 } 335#endif 336 337 cfiscsi_pdu_handle(request); 338} 339 340static void 341cfiscsi_error_callback(struct icl_conn *ic) 342{ 343 struct cfiscsi_session *cs; 344 345 cs = CONN_SESSION(ic); 346 347 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 348 cfiscsi_session_terminate(cs); 349} 350 351static int 352cfiscsi_pdu_prepare(struct icl_pdu *response) 353{ 354 struct cfiscsi_session *cs; 355 struct iscsi_bhs_scsi_response *bhssr; 356 bool advance_statsn = true; 357 358 cs = PDU_SESSION(response); 359 360 CFISCSI_SESSION_LOCK_ASSERT(cs); 361 362 /* 363 * We're only using fields common for all the response 364 * (target -> initiator) PDUs. 365 */ 366 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 367 368 /* 369 * 10.8.3: "The StatSN for this connection is not advanced 370 * after this PDU is sent." 371 */ 372 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 373 advance_statsn = false; 374 375 /* 376 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 377 * StatSN for the connection is not advanced after this PDU is sent." 378 */ 379 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 380 bhssr->bhssr_initiator_task_tag == 0xffffffff) 381 advance_statsn = false; 382 383 /* 384 * See the comment below - StatSN is not meaningful and must 385 * not be advanced. 386 */ 387 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 388 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 389 advance_statsn = false; 390 391 /* 392 * 10.7.3: "The fields StatSN, Status, and Residual Count 393 * only have meaningful content if the S bit is set to 1." 394 */ 395 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 396 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 397 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 398 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 399 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 400 401 if (advance_statsn) 402 cs->cs_statsn++; 403 404 return (0); 405} 406 407static void 408cfiscsi_pdu_queue(struct icl_pdu *response) 409{ 410 struct cfiscsi_session *cs; 411 412 cs = PDU_SESSION(response); 413 414 CFISCSI_SESSION_LOCK(cs); 415 cfiscsi_pdu_prepare(response); 416 icl_pdu_queue(response); 417 CFISCSI_SESSION_UNLOCK(cs); 418} 419 420static uint32_t 421cfiscsi_decode_lun(uint64_t encoded) 422{ 423 uint8_t lun[8]; 424 uint32_t result; 425 426 /* 427 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 428 * but is in fact an evil, multidimensional structure defined 429 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 430 */ 431 memcpy(lun, &encoded, sizeof(lun)); 432 switch (lun[0] & 0xC0) { 433 case 0x00: 434 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 435 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 436 CFISCSI_WARN("malformed LUN " 437 "(peripheral device addressing method): 0x%jx", 438 (uintmax_t)encoded); 439 result = 0xffffffff; 440 break; 441 } 442 result = lun[1]; 443 break; 444 case 0x40: 445 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 446 lun[6] != 0 || lun[7] != 0) { 447 CFISCSI_WARN("malformed LUN " 448 "(flat address space addressing method): 0x%jx", 449 (uintmax_t)encoded); 450 result = 0xffffffff; 451 break; 452 } 453 result = ((lun[0] & 0x3f) << 8) + lun[1]; 454 break; 455 case 0xC0: 456 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 457 lun[6] != 0 || lun[7] != 0) { 458 CFISCSI_WARN("malformed LUN (extended flat " 459 "address space addressing method): 0x%jx", 460 (uintmax_t)encoded); 461 result = 0xffffffff; 462 break; 463 } 464 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 465 default: 466 CFISCSI_WARN("unsupported LUN format 0x%jx", 467 (uintmax_t)encoded); 468 result = 0xffffffff; 469 break; 470 } 471 472 return (result); 473} 474 475static void 476cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 477{ 478 struct cfiscsi_session *cs; 479 struct iscsi_bhs_nop_out *bhsno; 480 struct iscsi_bhs_nop_in *bhsni; 481 struct icl_pdu *response; 482 void *data = NULL; 483 size_t datasize; 484 int error; 485 486 cs = PDU_SESSION(request); 487 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 488 489 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 490 /* 491 * Nothing to do, iscsi_pdu_update_statsn() already 492 * zeroed the timeout. 493 */ 494 icl_pdu_free(request); 495 return; 496 } 497 498 datasize = icl_pdu_data_segment_length(request); 499 if (datasize > 0) { 500 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 501 if (data == NULL) { 502 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 503 "dropping connection"); 504 icl_pdu_free(request); 505 cfiscsi_session_terminate(cs); 506 return; 507 } 508 icl_pdu_get_data(request, 0, data, datasize); 509 } 510 511 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 512 if (response == NULL) { 513 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 514 "droppping connection"); 515 free(data, M_CFISCSI); 516 icl_pdu_free(request); 517 cfiscsi_session_terminate(cs); 518 return; 519 } 520 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 521 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 522 bhsni->bhsni_flags = 0x80; 523 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 524 bhsni->bhsni_target_transfer_tag = 0xffffffff; 525 if (datasize > 0) { 526 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 527 if (error != 0) { 528 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 529 "dropping connection"); 530 free(data, M_CFISCSI); 531 icl_pdu_free(request); 532 icl_pdu_free(response); 533 cfiscsi_session_terminate(cs); 534 return; 535 } 536 free(data, M_CFISCSI); 537 } 538 539 icl_pdu_free(request); 540 cfiscsi_pdu_queue(response); 541} 542 543static void 544cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 545{ 546 struct iscsi_bhs_scsi_command *bhssc; 547 struct cfiscsi_session *cs; 548 union ctl_io *io; 549 int error; 550 551 cs = PDU_SESSION(request); 552 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 553 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 554 // bhssc->bhssc_initiator_task_tag); 555 556 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 557 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 558 "ImmediateData=No; dropping connection"); 559 icl_pdu_free(request); 560 cfiscsi_session_terminate(cs); 561 return; 562 } 563 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 564 ctl_zero_io(io); 565 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 566 io->io_hdr.io_type = CTL_IO_SCSI; 567 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 568 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 569 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 570 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 571 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 572 case BHSSC_FLAGS_ATTR_UNTAGGED: 573 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 574 break; 575 case BHSSC_FLAGS_ATTR_SIMPLE: 576 io->scsiio.tag_type = CTL_TAG_SIMPLE; 577 break; 578 case BHSSC_FLAGS_ATTR_ORDERED: 579 io->scsiio.tag_type = CTL_TAG_ORDERED; 580 break; 581 case BHSSC_FLAGS_ATTR_HOQ: 582 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 583 break; 584 case BHSSC_FLAGS_ATTR_ACA: 585 io->scsiio.tag_type = CTL_TAG_ACA; 586 break; 587 default: 588 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 589 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 590 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 591 break; 592 } 593 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 594 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 595 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 596 error = ctl_queue(io); 597 if (error != CTL_RETVAL_COMPLETE) { 598 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 599 "dropping connection", error); 600 ctl_free_io(io); 601 refcount_release(&cs->cs_outstanding_ctl_pdus); 602 icl_pdu_free(request); 603 cfiscsi_session_terminate(cs); 604 } 605} 606 607static void 608cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 609{ 610 struct iscsi_bhs_task_management_request *bhstmr; 611 struct iscsi_bhs_task_management_response *bhstmr2; 612 struct icl_pdu *response; 613 struct cfiscsi_session *cs; 614 union ctl_io *io; 615 int error; 616 617 cs = PDU_SESSION(request); 618 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 619 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 620 ctl_zero_io(io); 621 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 622 io->io_hdr.io_type = CTL_IO_TASK; 623 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 624 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 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 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 655#if 0 656 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 657#endif 658 io->taskio.task_action = CTL_TASK_TARGET_RESET; 659 break; 660 default: 661 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 662 bhstmr->bhstmr_function & ~0x80); 663 ctl_free_io(io); 664 665 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 666 if (response == NULL) { 667 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 668 "dropping connection"); 669 icl_pdu_free(request); 670 cfiscsi_session_terminate(cs); 671 return; 672 } 673 bhstmr2 = (struct iscsi_bhs_task_management_response *) 674 response->ip_bhs; 675 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 676 bhstmr2->bhstmr_flags = 0x80; 677 bhstmr2->bhstmr_response = 678 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 679 bhstmr2->bhstmr_initiator_task_tag = 680 bhstmr->bhstmr_initiator_task_tag; 681 icl_pdu_free(request); 682 cfiscsi_pdu_queue(response); 683 return; 684 } 685 686 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 687 error = ctl_queue(io); 688 if (error != CTL_RETVAL_COMPLETE) { 689 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 690 "dropping connection", error); 691 ctl_free_io(io); 692 refcount_release(&cs->cs_outstanding_ctl_pdus); 693 icl_pdu_free(request); 694 cfiscsi_session_terminate(cs); 695 } 696} 697 698static bool 699cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 700{ 701 struct iscsi_bhs_data_out *bhsdo; 702 struct cfiscsi_session *cs; 703 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 704 size_t copy_len, len, off, buffer_offset; 705 int ctl_sg_count; 706 union ctl_io *io; 707 708 cs = PDU_SESSION(request); 709 710 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 711 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 712 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 713 ISCSI_BHS_OPCODE_SCSI_COMMAND, 714 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 715 716 /* 717 * We're only using fields common for Data-Out and SCSI Command PDUs. 718 */ 719 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 720 721 io = cdw->cdw_ctl_io; 722 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 723 ("CTL_FLAG_DATA_IN")); 724 725#if 0 726 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 727 request->ip_data_len, io->scsiio.kern_total_len); 728#endif 729 730 if (io->scsiio.kern_sg_entries > 0) { 731 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 732 ctl_sg_count = io->scsiio.kern_sg_entries; 733 } else { 734 ctl_sglist = &ctl_sg_entry; 735 ctl_sglist->addr = io->scsiio.kern_data_ptr; 736 ctl_sglist->len = io->scsiio.kern_data_len; 737 ctl_sg_count = 1; 738 } 739 740 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 741 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 742 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 743 else 744 buffer_offset = 0; 745 len = icl_pdu_data_segment_length(request); 746 747 /* 748 * Make sure the offset, as sent by the initiator, matches the offset 749 * we're supposed to be at in the scatter-gather list. 750 */ 751 if (buffer_offset > 752 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 753 buffer_offset + len <= 754 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 755 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 756 "expected %zd; dropping connection", buffer_offset, 757 (size_t)io->scsiio.kern_rel_offset + 758 (size_t)io->scsiio.ext_data_filled); 759 ctl_set_data_phase_error(&io->scsiio); 760 cfiscsi_session_terminate(cs); 761 return (true); 762 } 763 764 /* 765 * This is the offset within the PDU data segment, as opposed 766 * to buffer_offset, which is the offset within the task (SCSI 767 * command). 768 */ 769 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 770 buffer_offset; 771 772 /* 773 * Iterate over the scatter/gather segments, filling them with data 774 * from the PDU data segment. Note that this can get called multiple 775 * times for one SCSI command; the cdw structure holds state for the 776 * scatter/gather list. 777 */ 778 for (;;) { 779 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 780 ("cdw->cdw_sg_index >= ctl_sg_count")); 781 if (cdw->cdw_sg_len == 0) { 782 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 783 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 784 } 785 KASSERT(off <= len, ("len > off")); 786 copy_len = len - off; 787 if (copy_len > cdw->cdw_sg_len) 788 copy_len = cdw->cdw_sg_len; 789 790 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 791 cdw->cdw_sg_addr += copy_len; 792 cdw->cdw_sg_len -= copy_len; 793 off += copy_len; 794 io->scsiio.ext_data_filled += copy_len; 795 796 if (cdw->cdw_sg_len == 0) { 797 /* 798 * End of current segment. 799 */ 800 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 801 /* 802 * Last segment in scatter/gather list. 803 */ 804 break; 805 } 806 cdw->cdw_sg_index++; 807 } 808 809 if (off == len) { 810 /* 811 * End of PDU payload. 812 */ 813 break; 814 } 815 } 816 817 if (len > off) { 818 /* 819 * In case of unsolicited data, it's possible that the buffer 820 * provided by CTL is smaller than negotiated FirstBurstLength. 821 * Just ignore the superfluous data; will ask for them with R2T 822 * on next call to cfiscsi_datamove(). 823 * 824 * This obviously can only happen with SCSI Command PDU. 825 */ 826 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 827 ISCSI_BHS_OPCODE_SCSI_COMMAND) 828 return (true); 829 830 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 831 "expected %zd; dropping connection", 832 icl_pdu_data_segment_length(request), off); 833 ctl_set_data_phase_error(&io->scsiio); 834 cfiscsi_session_terminate(cs); 835 return (true); 836 } 837 838 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 839 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 840 CFISCSI_SESSION_WARN(cs, "got the final packet without " 841 "the F flag; flags = 0x%x; dropping connection", 842 bhsdo->bhsdo_flags); 843 ctl_set_data_phase_error(&io->scsiio); 844 cfiscsi_session_terminate(cs); 845 return (true); 846 } 847 848 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 849 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 850 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 851 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 852 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 853 "transmitted size was %zd bytes instead of %d; " 854 "dropping connection", 855 (size_t)io->scsiio.ext_data_filled, 856 cdw->cdw_r2t_end); 857 ctl_set_data_phase_error(&io->scsiio); 858 cfiscsi_session_terminate(cs); 859 return (true); 860 } else { 861 /* 862 * For SCSI Command PDU, this just means we need to 863 * solicit more data by sending R2T. 864 */ 865 return (false); 866 } 867 } 868 869 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 870#if 0 871 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 872 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 873#endif 874 875 return (true); 876 } 877 878 return (false); 879} 880 881static void 882cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 883{ 884 struct iscsi_bhs_data_out *bhsdo; 885 struct cfiscsi_session *cs; 886 struct cfiscsi_data_wait *cdw = NULL; 887 union ctl_io *io; 888 bool done; 889 890 cs = PDU_SESSION(request); 891 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 892 893 CFISCSI_SESSION_LOCK(cs); 894 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 895#if 0 896 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 897 "ttt 0x%x, itt 0x%x", 898 bhsdo->bhsdo_target_transfer_tag, 899 bhsdo->bhsdo_initiator_task_tag, 900 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 901#endif 902 if (bhsdo->bhsdo_target_transfer_tag == 903 cdw->cdw_target_transfer_tag) 904 break; 905 } 906 CFISCSI_SESSION_UNLOCK(cs); 907 if (cdw == NULL) { 908 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 909 "0x%x, not found; dropping connection", 910 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 911 icl_pdu_free(request); 912 cfiscsi_session_terminate(cs); 913 return; 914 } 915 916 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 917 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 918 "DataSN %u, while expected %u; dropping connection", 919 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 920 icl_pdu_free(request); 921 cfiscsi_session_terminate(cs); 922 return; 923 } 924 cdw->cdw_datasn++; 925 926 io = cdw->cdw_ctl_io; 927 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 928 ("CTL_FLAG_DATA_IN")); 929 930 done = cfiscsi_handle_data_segment(request, cdw); 931 if (done) { 932 CFISCSI_SESSION_LOCK(cs); 933 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 934 CFISCSI_SESSION_UNLOCK(cs); 935 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 936 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 937 cfiscsi_data_wait_free(cs, cdw); 938 if (done) 939 io->scsiio.be_move_done(io); 940 else 941 cfiscsi_datamove_out(io); 942 } 943 944 icl_pdu_free(request); 945} 946 947static void 948cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 949{ 950 struct iscsi_bhs_logout_request *bhslr; 951 struct iscsi_bhs_logout_response *bhslr2; 952 struct icl_pdu *response; 953 struct cfiscsi_session *cs; 954 955 cs = PDU_SESSION(request); 956 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 957 switch (bhslr->bhslr_reason & 0x7f) { 958 case BHSLR_REASON_CLOSE_SESSION: 959 case BHSLR_REASON_CLOSE_CONNECTION: 960 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 961 if (response == NULL) { 962 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 963 icl_pdu_free(request); 964 cfiscsi_session_terminate(cs); 965 return; 966 } 967 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 968 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 969 bhslr2->bhslr_flags = 0x80; 970 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 971 bhslr2->bhslr_initiator_task_tag = 972 bhslr->bhslr_initiator_task_tag; 973 icl_pdu_free(request); 974 cfiscsi_pdu_queue(response); 975 cfiscsi_session_terminate(cs); 976 break; 977 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 978 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 979 if (response == NULL) { 980 CFISCSI_SESSION_WARN(cs, 981 "failed to allocate memory; dropping connection"); 982 icl_pdu_free(request); 983 cfiscsi_session_terminate(cs); 984 return; 985 } 986 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 987 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 988 bhslr2->bhslr_flags = 0x80; 989 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 990 bhslr2->bhslr_initiator_task_tag = 991 bhslr->bhslr_initiator_task_tag; 992 icl_pdu_free(request); 993 cfiscsi_pdu_queue(response); 994 break; 995 default: 996 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 997 bhslr->bhslr_reason); 998 icl_pdu_free(request); 999 cfiscsi_session_terminate(cs); 1000 break; 1001 } 1002} 1003 1004static void 1005cfiscsi_callout(void *context) 1006{ 1007 struct icl_pdu *cp; 1008 struct iscsi_bhs_nop_in *bhsni; 1009 struct cfiscsi_session *cs; 1010 1011 cs = context; 1012 1013 if (cs->cs_terminating) 1014 return; 1015 1016 callout_schedule(&cs->cs_callout, 1 * hz); 1017 1018 atomic_add_int(&cs->cs_timeout, 1); 1019 1020#ifdef ICL_KERNEL_PROXY 1021 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1022 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1023 CFISCSI_SESSION_WARN(cs, "login timed out after " 1024 "%d seconds; dropping connection", cs->cs_timeout); 1025 cfiscsi_session_terminate(cs); 1026 } 1027 return; 1028 } 1029#endif 1030 1031 if (ping_timeout <= 0) { 1032 /* 1033 * Pings are disabled. Don't send NOP-In in this case; 1034 * user might have disabled pings to work around problems 1035 * with certain initiators that can't properly handle 1036 * NOP-In, such as iPXE. Reset the timeout, to avoid 1037 * triggering reconnection, should the user decide to 1038 * reenable them. 1039 */ 1040 cs->cs_timeout = 0; 1041 return; 1042 } 1043 1044 if (cs->cs_timeout >= ping_timeout) { 1045 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1046 "dropping connection", ping_timeout); 1047 cfiscsi_session_terminate(cs); 1048 return; 1049 } 1050 1051 /* 1052 * If the ping was reset less than one second ago - which means 1053 * that we've received some PDU during the last second - assume 1054 * the traffic flows correctly and don't bother sending a NOP-Out. 1055 * 1056 * (It's 2 - one for one second, and one for incrementing is_timeout 1057 * earlier in this routine.) 1058 */ 1059 if (cs->cs_timeout < 2) 1060 return; 1061 1062 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1063 if (cp == NULL) { 1064 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1065 return; 1066 } 1067 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1068 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1069 bhsni->bhsni_flags = 0x80; 1070 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1071 1072 cfiscsi_pdu_queue(cp); 1073} 1074 1075static struct cfiscsi_data_wait * 1076cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1077 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1078{ 1079 struct cfiscsi_data_wait *cdw; 1080 int error; 1081 1082 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1083 if (cdw == NULL) { 1084 CFISCSI_SESSION_WARN(cs, 1085 "failed to allocate %zd bytes", sizeof(*cdw)); 1086 return (NULL); 1087 } 1088 1089 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1090 &cdw->cdw_icl_prv); 1091 if (error != 0) { 1092 CFISCSI_SESSION_WARN(cs, 1093 "icl_conn_transfer_setup() failed with error %d", error); 1094 uma_zfree(cfiscsi_data_wait_zone, cdw); 1095 return (NULL); 1096 } 1097 1098 cdw->cdw_ctl_io = io; 1099 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1100 cdw->cdw_initiator_task_tag = initiator_task_tag; 1101 1102 return (cdw); 1103} 1104 1105static void 1106cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1107 struct cfiscsi_data_wait *cdw) 1108{ 1109 1110 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1111 uma_zfree(cfiscsi_data_wait_zone, cdw); 1112} 1113 1114static void 1115cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1116{ 1117 struct cfiscsi_data_wait *cdw; 1118 union ctl_io *io; 1119 int error, last, wait; 1120 1121 if (cs->cs_target == NULL) 1122 return; /* No target yet, so nothing to do. */ 1123 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1124 ctl_zero_io(io); 1125 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1126 io->io_hdr.io_type = CTL_IO_TASK; 1127 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1128 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1129 io->io_hdr.nexus.targ_lun = 0; 1130 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1131 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1132 wait = cs->cs_outstanding_ctl_pdus; 1133 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1134 error = ctl_queue(io); 1135 if (error != CTL_RETVAL_COMPLETE) { 1136 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1137 refcount_release(&cs->cs_outstanding_ctl_pdus); 1138 ctl_free_io(io); 1139 } 1140 1141 CFISCSI_SESSION_LOCK(cs); 1142 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1143 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1144 CFISCSI_SESSION_UNLOCK(cs); 1145 /* 1146 * Set nonzero port status; this prevents backends from 1147 * assuming that the data transfer actually succeeded 1148 * and writing uninitialized data to disk. 1149 */ 1150 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1151 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1152 cfiscsi_data_wait_free(cs, cdw); 1153 CFISCSI_SESSION_LOCK(cs); 1154 } 1155 CFISCSI_SESSION_UNLOCK(cs); 1156 1157 /* 1158 * Wait for CTL to terminate all the tasks. 1159 */ 1160 if (wait > 0) 1161 CFISCSI_SESSION_WARN(cs, 1162 "waiting for CTL to terminate %d tasks", wait); 1163 for (;;) { 1164 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1165 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1166 if (last != 0) 1167 break; 1168 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1169 0, "cfiscsi_terminate", hz / 100); 1170 } 1171 if (wait > 0) 1172 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1173} 1174 1175static void 1176cfiscsi_maintenance_thread(void *arg) 1177{ 1178 struct cfiscsi_session *cs; 1179 1180 cs = arg; 1181 1182 for (;;) { 1183 CFISCSI_SESSION_LOCK(cs); 1184 if (cs->cs_terminating == false) 1185 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1186 CFISCSI_SESSION_UNLOCK(cs); 1187 1188 if (cs->cs_terminating) { 1189 1190 /* 1191 * We used to wait up to 30 seconds to deliver queued 1192 * PDUs to the initiator. We also tried hard to deliver 1193 * SCSI Responses for the aborted PDUs. We don't do 1194 * that anymore. We might need to revisit that. 1195 */ 1196 callout_drain(&cs->cs_callout); 1197 icl_conn_close(cs->cs_conn); 1198 1199 /* 1200 * At this point ICL receive thread is no longer 1201 * running; no new tasks can be queued. 1202 */ 1203 cfiscsi_session_terminate_tasks(cs); 1204 cfiscsi_session_delete(cs); 1205 kthread_exit(); 1206 return; 1207 } 1208 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1209 } 1210} 1211 1212static void 1213cfiscsi_session_terminate(struct cfiscsi_session *cs) 1214{ 1215 1216 if (cs->cs_terminating) 1217 return; 1218 cs->cs_terminating = true; 1219 cv_signal(&cs->cs_maintenance_cv); 1220#ifdef ICL_KERNEL_PROXY 1221 cv_signal(&cs->cs_login_cv); 1222#endif 1223} 1224 1225static int 1226cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1227{ 1228 struct cfiscsi_target *ct; 1229 char *name; 1230 int i; 1231 1232 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1233 1234 ct = cs->cs_target; 1235 name = strdup(cs->cs_initiator_id, M_CTL); 1236 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1237 if (i < 0) { 1238 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1239 i); 1240 cs->cs_ctl_initid = -1; 1241 return (1); 1242 } 1243 cs->cs_ctl_initid = i; 1244#if 0 1245 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1246#endif 1247 1248 return (0); 1249} 1250 1251static void 1252cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1253{ 1254 int error; 1255 1256 if (cs->cs_ctl_initid == -1) 1257 return; 1258 1259 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1260 if (error != 0) { 1261 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1262 error); 1263 } 1264 cs->cs_ctl_initid = -1; 1265} 1266 1267static struct cfiscsi_session * 1268cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1269{ 1270 struct cfiscsi_session *cs; 1271 int error; 1272 1273 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1274 if (cs == NULL) { 1275 CFISCSI_WARN("malloc failed"); 1276 return (NULL); 1277 } 1278 cs->cs_ctl_initid = -1; 1279 1280 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1281 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1282 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1283 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1284#ifdef ICL_KERNEL_PROXY 1285 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1286#endif 1287 1288 cs->cs_conn = icl_new_conn(offload, "cfiscsi", &cs->cs_lock); 1289 if (cs->cs_conn == NULL) { 1290 free(cs, M_CFISCSI); 1291 return (NULL); 1292 } 1293 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1294 cs->cs_conn->ic_error = cfiscsi_error_callback; 1295 cs->cs_conn->ic_prv0 = cs; 1296 1297 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1298 if (error != 0) { 1299 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1300 free(cs, M_CFISCSI); 1301 return (NULL); 1302 } 1303 1304 mtx_lock(&softc->lock); 1305 cs->cs_id = ++softc->last_session_id; 1306 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1307 mtx_unlock(&softc->lock); 1308 1309 /* 1310 * Start pinging the initiator. 1311 */ 1312 callout_init(&cs->cs_callout, 1); 1313 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1314 1315 return (cs); 1316} 1317 1318static void 1319cfiscsi_session_delete(struct cfiscsi_session *cs) 1320{ 1321 struct cfiscsi_softc *softc; 1322 1323 softc = &cfiscsi_softc; 1324 1325 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1326 ("destroying session with outstanding CTL pdus")); 1327 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1328 ("destroying session with non-empty queue")); 1329 1330 cfiscsi_session_unregister_initiator(cs); 1331 if (cs->cs_target != NULL) 1332 cfiscsi_target_release(cs->cs_target); 1333 icl_conn_close(cs->cs_conn); 1334 icl_conn_free(cs->cs_conn); 1335 1336 mtx_lock(&softc->lock); 1337 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1338 cv_signal(&softc->sessions_cv); 1339 mtx_unlock(&softc->lock); 1340 1341 free(cs, M_CFISCSI); 1342} 1343 1344int 1345cfiscsi_init(void) 1346{ 1347 struct cfiscsi_softc *softc; 1348 int retval; 1349 1350 softc = &cfiscsi_softc; 1351 retval = 0; 1352 bzero(softc, sizeof(*softc)); 1353 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1354 1355 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1356#ifdef ICL_KERNEL_PROXY 1357 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1358#endif 1359 TAILQ_INIT(&softc->sessions); 1360 TAILQ_INIT(&softc->targets); 1361 1362 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1363 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1364 UMA_ALIGN_PTR, 0); 1365 1366 return (0); 1367} 1368 1369#ifdef ICL_KERNEL_PROXY 1370static void 1371cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1372{ 1373 struct cfiscsi_session *cs; 1374 1375 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1376 if (cs == NULL) { 1377 CFISCSI_WARN("failed to create session"); 1378 return; 1379 } 1380 1381 icl_conn_handoff_sock(cs->cs_conn, so); 1382 cs->cs_initiator_sa = sa; 1383 cs->cs_portal_id = portal_id; 1384 cs->cs_waiting_for_ctld = true; 1385 cv_signal(&cfiscsi_softc.accept_cv); 1386} 1387#endif 1388 1389static void 1390cfiscsi_online(void *arg) 1391{ 1392 struct cfiscsi_softc *softc; 1393 struct cfiscsi_target *ct; 1394 int online; 1395 1396 ct = (struct cfiscsi_target *)arg; 1397 softc = ct->ct_softc; 1398 1399 mtx_lock(&softc->lock); 1400 if (ct->ct_online) { 1401 mtx_unlock(&softc->lock); 1402 return; 1403 } 1404 ct->ct_online = 1; 1405 online = softc->online++; 1406 mtx_unlock(&softc->lock); 1407 if (online > 0) 1408 return; 1409 1410#ifdef ICL_KERNEL_PROXY 1411 if (softc->listener != NULL) 1412 icl_listen_free(softc->listener); 1413 softc->listener = icl_listen_new(cfiscsi_accept); 1414#endif 1415} 1416 1417static void 1418cfiscsi_offline(void *arg) 1419{ 1420 struct cfiscsi_softc *softc; 1421 struct cfiscsi_target *ct; 1422 struct cfiscsi_session *cs; 1423 int online; 1424 1425 ct = (struct cfiscsi_target *)arg; 1426 softc = ct->ct_softc; 1427 1428 mtx_lock(&softc->lock); 1429 if (!ct->ct_online) { 1430 mtx_unlock(&softc->lock); 1431 return; 1432 } 1433 ct->ct_online = 0; 1434 online = --softc->online; 1435 1436 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1437 if (cs->cs_target == ct) 1438 cfiscsi_session_terminate(cs); 1439 } 1440 do { 1441 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1442 if (cs->cs_target == ct) 1443 break; 1444 } 1445 if (cs != NULL) 1446 cv_wait(&softc->sessions_cv, &softc->lock); 1447 } while (cs != NULL && ct->ct_online == 0); 1448 mtx_unlock(&softc->lock); 1449 if (online > 0) 1450 return; 1451 1452#ifdef ICL_KERNEL_PROXY 1453 icl_listen_free(softc->listener); 1454 softc->listener = NULL; 1455#endif 1456} 1457 1458static int 1459cfiscsi_info(void *arg, struct sbuf *sb) 1460{ 1461 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1462 int retval; 1463 1464 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1465 ct->ct_state); 1466 return (retval); 1467} 1468 1469static void 1470cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1471{ 1472 struct cfiscsi_softc *softc; 1473 struct cfiscsi_session *cs, *cs2; 1474 struct cfiscsi_target *ct; 1475 struct ctl_iscsi_handoff_params *cihp; 1476 int error; 1477 1478 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1479 softc = &cfiscsi_softc; 1480 1481 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1482 cihp->initiator_name, cihp->initiator_addr, 1483 cihp->target_name); 1484 1485 ct = cfiscsi_target_find(softc, cihp->target_name, 1486 cihp->portal_group_tag); 1487 if (ct == NULL) { 1488 ci->status = CTL_ISCSI_ERROR; 1489 snprintf(ci->error_str, sizeof(ci->error_str), 1490 "%s: target not found", __func__); 1491 return; 1492 } 1493 1494#ifdef ICL_KERNEL_PROXY 1495 if (cihp->socket > 0 && cihp->connection_id > 0) { 1496 snprintf(ci->error_str, sizeof(ci->error_str), 1497 "both socket and connection_id set"); 1498 ci->status = CTL_ISCSI_ERROR; 1499 cfiscsi_target_release(ct); 1500 return; 1501 } 1502 if (cihp->socket == 0) { 1503 mtx_lock(&cfiscsi_softc.lock); 1504 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1505 if (cs->cs_id == cihp->connection_id) 1506 break; 1507 } 1508 if (cs == NULL) { 1509 mtx_unlock(&cfiscsi_softc.lock); 1510 snprintf(ci->error_str, sizeof(ci->error_str), 1511 "connection not found"); 1512 ci->status = CTL_ISCSI_ERROR; 1513 cfiscsi_target_release(ct); 1514 return; 1515 } 1516 mtx_unlock(&cfiscsi_softc.lock); 1517 } else { 1518#endif 1519 cs = cfiscsi_session_new(softc, cihp->offload); 1520 if (cs == NULL) { 1521 ci->status = CTL_ISCSI_ERROR; 1522 snprintf(ci->error_str, sizeof(ci->error_str), 1523 "%s: cfiscsi_session_new failed", __func__); 1524 cfiscsi_target_release(ct); 1525 return; 1526 } 1527#ifdef ICL_KERNEL_PROXY 1528 } 1529#endif 1530 1531 /* 1532 * First PDU of Full Feature phase has the same CmdSN as the last 1533 * PDU from the Login Phase received from the initiator. Thus, 1534 * the -1 below. 1535 */ 1536 cs->cs_cmdsn = cihp->cmdsn; 1537 cs->cs_statsn = cihp->statsn; 1538 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1539 cs->cs_max_burst_length = cihp->max_burst_length; 1540 cs->cs_immediate_data = !!cihp->immediate_data; 1541 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1542 cs->cs_conn->ic_header_crc32c = true; 1543 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1544 cs->cs_conn->ic_data_crc32c = true; 1545 1546 strlcpy(cs->cs_initiator_name, 1547 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1548 strlcpy(cs->cs_initiator_addr, 1549 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1550 strlcpy(cs->cs_initiator_alias, 1551 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1552 memcpy(cs->cs_initiator_isid, 1553 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1554 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1555 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1556 cihp->initiator_isid[0], cihp->initiator_isid[1], 1557 cihp->initiator_isid[2], cihp->initiator_isid[3], 1558 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1559 1560 mtx_lock(&softc->lock); 1561 if (ct->ct_online == 0) { 1562 mtx_unlock(&softc->lock); 1563 cfiscsi_session_terminate(cs); 1564 cfiscsi_target_release(ct); 1565 ci->status = CTL_ISCSI_ERROR; 1566 snprintf(ci->error_str, sizeof(ci->error_str), 1567 "%s: port offline", __func__); 1568 return; 1569 } 1570 cs->cs_target = ct; 1571 mtx_unlock(&softc->lock); 1572 1573 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1574restart: 1575 if (!cs->cs_terminating) { 1576 mtx_lock(&softc->lock); 1577 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1578 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1579 cs->cs_target == cs2->cs_target && 1580 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1581 cfiscsi_session_terminate(cs2); 1582 mtx_unlock(&softc->lock); 1583 pause("cfiscsi_reinstate", 1); 1584 goto restart; 1585 } 1586 } 1587 mtx_unlock(&softc->lock); 1588 } 1589 1590 /* 1591 * Register initiator with CTL. 1592 */ 1593 cfiscsi_session_register_initiator(cs); 1594 1595#ifdef ICL_KERNEL_PROXY 1596 if (cihp->socket > 0) { 1597#endif 1598 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1599 if (error != 0) { 1600 cfiscsi_session_terminate(cs); 1601 refcount_release(&cs->cs_outstanding_ctl_pdus); 1602 ci->status = CTL_ISCSI_ERROR; 1603 snprintf(ci->error_str, sizeof(ci->error_str), 1604 "%s: icl_conn_handoff failed with error %d", 1605 __func__, error); 1606 return; 1607 } 1608#ifdef ICL_KERNEL_PROXY 1609 } 1610#endif 1611 1612#ifdef ICL_KERNEL_PROXY 1613 cs->cs_login_phase = false; 1614 1615 /* 1616 * First PDU of the Full Feature phase has likely already arrived. 1617 * We have to pick it up and execute properly. 1618 */ 1619 if (cs->cs_login_pdu != NULL) { 1620 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1621 cfiscsi_pdu_handle(cs->cs_login_pdu); 1622 cs->cs_login_pdu = NULL; 1623 } 1624#endif 1625 1626 refcount_release(&cs->cs_outstanding_ctl_pdus); 1627 ci->status = CTL_ISCSI_OK; 1628} 1629 1630static void 1631cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1632{ 1633 struct ctl_iscsi_list_params *cilp; 1634 struct cfiscsi_session *cs; 1635 struct cfiscsi_softc *softc; 1636 struct sbuf *sb; 1637 int error; 1638 1639 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1640 softc = &cfiscsi_softc; 1641 1642 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1643 if (sb == NULL) { 1644 ci->status = CTL_ISCSI_ERROR; 1645 snprintf(ci->error_str, sizeof(ci->error_str), 1646 "Unable to allocate %d bytes for iSCSI session list", 1647 cilp->alloc_len); 1648 return; 1649 } 1650 1651 sbuf_printf(sb, "<ctlislist>\n"); 1652 mtx_lock(&softc->lock); 1653 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1654#ifdef ICL_KERNEL_PROXY 1655 if (cs->cs_target == NULL) 1656 continue; 1657#endif 1658 error = sbuf_printf(sb, "<connection id=\"%d\">" 1659 "<initiator>%s</initiator>" 1660 "<initiator_addr>%s</initiator_addr>" 1661 "<initiator_alias>%s</initiator_alias>" 1662 "<target>%s</target>" 1663 "<target_alias>%s</target_alias>" 1664 "<target_portal_group_tag>%u</target_portal_group_tag>" 1665 "<header_digest>%s</header_digest>" 1666 "<data_digest>%s</data_digest>" 1667 "<max_data_segment_length>%zd</max_data_segment_length>" 1668 "<immediate_data>%d</immediate_data>" 1669 "<iser>%d</iser>" 1670 "<offload>%s</offload>" 1671 "</connection>\n", 1672 cs->cs_id, 1673 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1674 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1675 cs->cs_target->ct_tag, 1676 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1677 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1678 cs->cs_max_data_segment_length, 1679 cs->cs_immediate_data, 1680 cs->cs_conn->ic_iser, 1681 cs->cs_conn->ic_offload); 1682 if (error != 0) 1683 break; 1684 } 1685 mtx_unlock(&softc->lock); 1686 error = sbuf_printf(sb, "</ctlislist>\n"); 1687 if (error != 0) { 1688 sbuf_delete(sb); 1689 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1690 snprintf(ci->error_str, sizeof(ci->error_str), 1691 "Out of space, %d bytes is too small", cilp->alloc_len); 1692 return; 1693 } 1694 sbuf_finish(sb); 1695 1696 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1697 cilp->fill_len = sbuf_len(sb) + 1; 1698 ci->status = CTL_ISCSI_OK; 1699 sbuf_delete(sb); 1700} 1701 1702static void 1703cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1704{ 1705 struct icl_pdu *response; 1706 struct iscsi_bhs_asynchronous_message *bhsam; 1707 struct ctl_iscsi_logout_params *cilp; 1708 struct cfiscsi_session *cs; 1709 struct cfiscsi_softc *softc; 1710 int found = 0; 1711 1712 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1713 softc = &cfiscsi_softc; 1714 1715 mtx_lock(&softc->lock); 1716 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1717 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1718 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1719 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1720 continue; 1721 1722 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1723 if (response == NULL) { 1724 ci->status = CTL_ISCSI_ERROR; 1725 snprintf(ci->error_str, sizeof(ci->error_str), 1726 "Unable to allocate memory"); 1727 mtx_unlock(&softc->lock); 1728 return; 1729 } 1730 bhsam = 1731 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1732 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1733 bhsam->bhsam_flags = 0x80; 1734 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1735 bhsam->bhsam_parameter3 = htons(10); 1736 cfiscsi_pdu_queue(response); 1737 found++; 1738 } 1739 mtx_unlock(&softc->lock); 1740 1741 if (found == 0) { 1742 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1743 snprintf(ci->error_str, sizeof(ci->error_str), 1744 "No matching connections found"); 1745 return; 1746 } 1747 1748 ci->status = CTL_ISCSI_OK; 1749} 1750 1751static void 1752cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1753{ 1754 struct icl_pdu *response; 1755 struct iscsi_bhs_asynchronous_message *bhsam; 1756 struct ctl_iscsi_terminate_params *citp; 1757 struct cfiscsi_session *cs; 1758 struct cfiscsi_softc *softc; 1759 int found = 0; 1760 1761 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1762 softc = &cfiscsi_softc; 1763 1764 mtx_lock(&softc->lock); 1765 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1766 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1767 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1768 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1769 continue; 1770 1771 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1772 if (response == NULL) { 1773 /* 1774 * Oh well. Just terminate the connection. 1775 */ 1776 } else { 1777 bhsam = (struct iscsi_bhs_asynchronous_message *) 1778 response->ip_bhs; 1779 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1780 bhsam->bhsam_flags = 0x80; 1781 bhsam->bhsam_0xffffffff = 0xffffffff; 1782 bhsam->bhsam_async_event = 1783 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1784 cfiscsi_pdu_queue(response); 1785 } 1786 cfiscsi_session_terminate(cs); 1787 found++; 1788 } 1789 mtx_unlock(&softc->lock); 1790 1791 if (found == 0) { 1792 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1793 snprintf(ci->error_str, sizeof(ci->error_str), 1794 "No matching connections found"); 1795 return; 1796 } 1797 1798 ci->status = CTL_ISCSI_OK; 1799} 1800 1801static void 1802cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1803{ 1804 struct ctl_iscsi_limits_params *cilp; 1805 int error; 1806 1807 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1808 1809 error = icl_limits(cilp->offload, &cilp->data_segment_limit); 1810 if (error != 0) { 1811 ci->status = CTL_ISCSI_ERROR; 1812 snprintf(ci->error_str, sizeof(ci->error_str), 1813 "%s: icl_limits failed with error %d", 1814 __func__, error); 1815 return; 1816 } 1817 1818 ci->status = CTL_ISCSI_OK; 1819} 1820 1821#ifdef ICL_KERNEL_PROXY 1822static void 1823cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1824{ 1825 struct ctl_iscsi_listen_params *cilp; 1826 struct sockaddr *sa; 1827 int error; 1828 1829 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1830 1831 if (cfiscsi_softc.listener == NULL) { 1832 CFISCSI_DEBUG("no listener"); 1833 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1834 ci->status = CTL_ISCSI_ERROR; 1835 return; 1836 } 1837 1838 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1839 if (error != 0) { 1840 CFISCSI_DEBUG("getsockaddr, error %d", error); 1841 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1842 ci->status = CTL_ISCSI_ERROR; 1843 return; 1844 } 1845 1846 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1847 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1848 if (error != 0) { 1849 free(sa, M_SONAME); 1850 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1851 snprintf(ci->error_str, sizeof(ci->error_str), 1852 "icl_listen_add failed, error %d", error); 1853 ci->status = CTL_ISCSI_ERROR; 1854 return; 1855 } 1856 1857 ci->status = CTL_ISCSI_OK; 1858} 1859 1860static void 1861cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1862{ 1863 struct ctl_iscsi_accept_params *ciap; 1864 struct cfiscsi_session *cs; 1865 int error; 1866 1867 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1868 1869 mtx_lock(&cfiscsi_softc.lock); 1870 for (;;) { 1871 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1872 if (cs->cs_waiting_for_ctld) 1873 break; 1874 } 1875 if (cs != NULL) 1876 break; 1877 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1878 if (error != 0) { 1879 mtx_unlock(&cfiscsi_softc.lock); 1880 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1881 ci->status = CTL_ISCSI_ERROR; 1882 return; 1883 } 1884 } 1885 mtx_unlock(&cfiscsi_softc.lock); 1886 1887 cs->cs_waiting_for_ctld = false; 1888 cs->cs_login_phase = true; 1889 1890 ciap->connection_id = cs->cs_id; 1891 ciap->portal_id = cs->cs_portal_id; 1892 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1893 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1894 cs->cs_initiator_sa->sa_len); 1895 if (error != 0) { 1896 snprintf(ci->error_str, sizeof(ci->error_str), 1897 "copyout failed with error %d", error); 1898 ci->status = CTL_ISCSI_ERROR; 1899 return; 1900 } 1901 1902 ci->status = CTL_ISCSI_OK; 1903} 1904 1905static void 1906cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1907{ 1908 struct ctl_iscsi_send_params *cisp; 1909 struct cfiscsi_session *cs; 1910 struct icl_pdu *ip; 1911 size_t datalen; 1912 void *data; 1913 int error; 1914 1915 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1916 1917 mtx_lock(&cfiscsi_softc.lock); 1918 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1919 if (cs->cs_id == cisp->connection_id) 1920 break; 1921 } 1922 if (cs == NULL) { 1923 mtx_unlock(&cfiscsi_softc.lock); 1924 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1925 ci->status = CTL_ISCSI_ERROR; 1926 return; 1927 } 1928 mtx_unlock(&cfiscsi_softc.lock); 1929 1930#if 0 1931 if (cs->cs_login_phase == false) 1932 return (EBUSY); 1933#endif 1934 1935 if (cs->cs_terminating) { 1936 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1937 ci->status = CTL_ISCSI_ERROR; 1938 return; 1939 } 1940 1941 datalen = cisp->data_segment_len; 1942 /* 1943 * XXX 1944 */ 1945 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1946 if (datalen > 65535) { 1947 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1948 ci->status = CTL_ISCSI_ERROR; 1949 return; 1950 } 1951 if (datalen > 0) { 1952 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1953 error = copyin(cisp->data_segment, data, datalen); 1954 if (error != 0) { 1955 free(data, M_CFISCSI); 1956 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1957 ci->status = CTL_ISCSI_ERROR; 1958 return; 1959 } 1960 } 1961 1962 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1963 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1964 if (datalen > 0) { 1965 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1966 free(data, M_CFISCSI); 1967 } 1968 CFISCSI_SESSION_LOCK(cs); 1969 icl_pdu_queue(ip); 1970 CFISCSI_SESSION_UNLOCK(cs); 1971 ci->status = CTL_ISCSI_OK; 1972} 1973 1974static void 1975cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1976{ 1977 struct ctl_iscsi_receive_params *cirp; 1978 struct cfiscsi_session *cs; 1979 struct icl_pdu *ip; 1980 void *data; 1981 int error; 1982 1983 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1984 1985 mtx_lock(&cfiscsi_softc.lock); 1986 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1987 if (cs->cs_id == cirp->connection_id) 1988 break; 1989 } 1990 if (cs == NULL) { 1991 mtx_unlock(&cfiscsi_softc.lock); 1992 snprintf(ci->error_str, sizeof(ci->error_str), 1993 "connection not found"); 1994 ci->status = CTL_ISCSI_ERROR; 1995 return; 1996 } 1997 mtx_unlock(&cfiscsi_softc.lock); 1998 1999#if 0 2000 if (is->is_login_phase == false) 2001 return (EBUSY); 2002#endif 2003 2004 CFISCSI_SESSION_LOCK(cs); 2005 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2006 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2007 if (error != 0) { 2008 CFISCSI_SESSION_UNLOCK(cs); 2009 snprintf(ci->error_str, sizeof(ci->error_str), 2010 "interrupted by signal"); 2011 ci->status = CTL_ISCSI_ERROR; 2012 return; 2013 } 2014 } 2015 2016 if (cs->cs_terminating) { 2017 CFISCSI_SESSION_UNLOCK(cs); 2018 snprintf(ci->error_str, sizeof(ci->error_str), 2019 "connection terminating"); 2020 ci->status = CTL_ISCSI_ERROR; 2021 return; 2022 } 2023 ip = cs->cs_login_pdu; 2024 cs->cs_login_pdu = NULL; 2025 CFISCSI_SESSION_UNLOCK(cs); 2026 2027 if (ip->ip_data_len > cirp->data_segment_len) { 2028 icl_pdu_free(ip); 2029 snprintf(ci->error_str, sizeof(ci->error_str), 2030 "data segment too big"); 2031 ci->status = CTL_ISCSI_ERROR; 2032 return; 2033 } 2034 2035 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2036 if (ip->ip_data_len > 0) { 2037 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2038 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2039 copyout(data, cirp->data_segment, ip->ip_data_len); 2040 free(data, M_CFISCSI); 2041 } 2042 2043 icl_pdu_free(ip); 2044 ci->status = CTL_ISCSI_OK; 2045} 2046 2047#endif /* !ICL_KERNEL_PROXY */ 2048 2049static void 2050cfiscsi_ioctl_port_create(struct ctl_req *req) 2051{ 2052 struct cfiscsi_target *ct; 2053 struct ctl_port *port; 2054 const char *target, *alias, *tags; 2055 struct scsi_vpd_id_descriptor *desc; 2056 ctl_options_t opts; 2057 int retval, len, idlen; 2058 uint16_t tag; 2059 2060 ctl_init_opts(&opts, req->num_args, req->kern_args); 2061 target = ctl_get_opt(&opts, "cfiscsi_target"); 2062 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2063 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2064 if (target == NULL || tags == NULL) { 2065 req->status = CTL_LUN_ERROR; 2066 snprintf(req->error_str, sizeof(req->error_str), 2067 "Missing required argument"); 2068 ctl_free_opts(&opts); 2069 return; 2070 } 2071 tag = strtol(tags, (char **)NULL, 10); 2072 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2073 if (ct == NULL) { 2074 req->status = CTL_LUN_ERROR; 2075 snprintf(req->error_str, sizeof(req->error_str), 2076 "failed to create target \"%s\"", target); 2077 ctl_free_opts(&opts); 2078 return; 2079 } 2080 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2081 req->status = CTL_LUN_ERROR; 2082 snprintf(req->error_str, sizeof(req->error_str), 2083 "target \"%s\" already exists", target); 2084 cfiscsi_target_release(ct); 2085 ctl_free_opts(&opts); 2086 return; 2087 } 2088 port = &ct->ct_port; 2089 // WAT 2090 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2091 goto done; 2092 2093 port->frontend = &cfiscsi_frontend; 2094 port->port_type = CTL_PORT_ISCSI; 2095 /* XXX KDM what should the real number be here? */ 2096 port->num_requested_ctl_io = 4096; 2097 port->port_name = "iscsi"; 2098 port->physical_port = tag; 2099 port->virtual_port = ct->ct_target_id; 2100 port->port_online = cfiscsi_online; 2101 port->port_offline = cfiscsi_offline; 2102 port->port_info = cfiscsi_info; 2103 port->onoff_arg = ct; 2104 port->fe_datamove = cfiscsi_datamove; 2105 port->fe_done = cfiscsi_done; 2106 2107 /* XXX KDM what should we report here? */ 2108 /* XXX These should probably be fetched from CTL. */ 2109 port->max_targets = 1; 2110 port->max_target_id = 15; 2111 port->targ_port = -1; 2112 2113 port->options = opts; 2114 STAILQ_INIT(&opts); 2115 2116 /* Generate Port ID. */ 2117 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2118 idlen = roundup2(idlen, 4); 2119 len = sizeof(struct scsi_vpd_device_id) + idlen; 2120 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2121 M_CTL, M_WAITOK | M_ZERO); 2122 port->port_devid->len = len; 2123 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2124 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2125 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2126 SVPD_ID_TYPE_SCSI_NAME; 2127 desc->length = idlen; 2128 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2129 2130 /* Generate Target ID. */ 2131 idlen = strlen(target) + 1; 2132 idlen = roundup2(idlen, 4); 2133 len = sizeof(struct scsi_vpd_device_id) + idlen; 2134 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2135 M_CTL, M_WAITOK | M_ZERO); 2136 port->target_devid->len = len; 2137 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2138 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2139 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2140 SVPD_ID_TYPE_SCSI_NAME; 2141 desc->length = idlen; 2142 strlcpy(desc->identifier, target, idlen); 2143 2144 retval = ctl_port_register(port); 2145 if (retval != 0) { 2146 ctl_free_opts(&port->options); 2147 cfiscsi_target_release(ct); 2148 free(port->port_devid, M_CFISCSI); 2149 free(port->target_devid, M_CFISCSI); 2150 req->status = CTL_LUN_ERROR; 2151 snprintf(req->error_str, sizeof(req->error_str), 2152 "ctl_port_register() failed with error %d", retval); 2153 return; 2154 } 2155done: 2156 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2157 req->status = CTL_LUN_OK; 2158 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2159 sizeof(port->targ_port)); //XXX 2160} 2161 2162static void 2163cfiscsi_ioctl_port_remove(struct ctl_req *req) 2164{ 2165 struct cfiscsi_target *ct; 2166 const char *target, *tags; 2167 ctl_options_t opts; 2168 uint16_t tag; 2169 2170 ctl_init_opts(&opts, req->num_args, req->kern_args); 2171 target = ctl_get_opt(&opts, "cfiscsi_target"); 2172 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2173 if (target == NULL || tags == NULL) { 2174 ctl_free_opts(&opts); 2175 req->status = CTL_LUN_ERROR; 2176 snprintf(req->error_str, sizeof(req->error_str), 2177 "Missing required argument"); 2178 return; 2179 } 2180 tag = strtol(tags, (char **)NULL, 10); 2181 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2182 if (ct == NULL) { 2183 ctl_free_opts(&opts); 2184 req->status = CTL_LUN_ERROR; 2185 snprintf(req->error_str, sizeof(req->error_str), 2186 "can't find target \"%s\"", target); 2187 return; 2188 } 2189 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2190 ctl_free_opts(&opts); 2191 req->status = CTL_LUN_ERROR; 2192 snprintf(req->error_str, sizeof(req->error_str), 2193 "target \"%s\" is already dying", target); 2194 return; 2195 } 2196 ctl_free_opts(&opts); 2197 2198 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2199 ctl_port_offline(&ct->ct_port); 2200 cfiscsi_target_release(ct); 2201 cfiscsi_target_release(ct); 2202 req->status = CTL_LUN_OK; 2203} 2204 2205static int 2206cfiscsi_ioctl(struct cdev *dev, 2207 u_long cmd, caddr_t addr, int flag, struct thread *td) 2208{ 2209 struct ctl_iscsi *ci; 2210 struct ctl_req *req; 2211 2212 if (cmd == CTL_PORT_REQ) { 2213 req = (struct ctl_req *)addr; 2214 switch (req->reqtype) { 2215 case CTL_REQ_CREATE: 2216 cfiscsi_ioctl_port_create(req); 2217 break; 2218 case CTL_REQ_REMOVE: 2219 cfiscsi_ioctl_port_remove(req); 2220 break; 2221 default: 2222 req->status = CTL_LUN_ERROR; 2223 snprintf(req->error_str, sizeof(req->error_str), 2224 "Unsupported request type %d", req->reqtype); 2225 } 2226 return (0); 2227 } 2228 2229 if (cmd != CTL_ISCSI) 2230 return (ENOTTY); 2231 2232 ci = (struct ctl_iscsi *)addr; 2233 switch (ci->type) { 2234 case CTL_ISCSI_HANDOFF: 2235 cfiscsi_ioctl_handoff(ci); 2236 break; 2237 case CTL_ISCSI_LIST: 2238 cfiscsi_ioctl_list(ci); 2239 break; 2240 case CTL_ISCSI_LOGOUT: 2241 cfiscsi_ioctl_logout(ci); 2242 break; 2243 case CTL_ISCSI_TERMINATE: 2244 cfiscsi_ioctl_terminate(ci); 2245 break; 2246 case CTL_ISCSI_LIMITS: 2247 cfiscsi_ioctl_limits(ci); 2248 break; 2249#ifdef ICL_KERNEL_PROXY 2250 case CTL_ISCSI_LISTEN: 2251 cfiscsi_ioctl_listen(ci); 2252 break; 2253 case CTL_ISCSI_ACCEPT: 2254 cfiscsi_ioctl_accept(ci); 2255 break; 2256 case CTL_ISCSI_SEND: 2257 cfiscsi_ioctl_send(ci); 2258 break; 2259 case CTL_ISCSI_RECEIVE: 2260 cfiscsi_ioctl_receive(ci); 2261 break; 2262#else 2263 case CTL_ISCSI_LISTEN: 2264 case CTL_ISCSI_ACCEPT: 2265 case CTL_ISCSI_SEND: 2266 case CTL_ISCSI_RECEIVE: 2267 ci->status = CTL_ISCSI_ERROR; 2268 snprintf(ci->error_str, sizeof(ci->error_str), 2269 "%s: CTL compiled without ICL_KERNEL_PROXY", 2270 __func__); 2271 break; 2272#endif /* !ICL_KERNEL_PROXY */ 2273 default: 2274 ci->status = CTL_ISCSI_ERROR; 2275 snprintf(ci->error_str, sizeof(ci->error_str), 2276 "%s: invalid iSCSI request type %d", __func__, ci->type); 2277 break; 2278 } 2279 2280 return (0); 2281} 2282 2283static void 2284cfiscsi_target_hold(struct cfiscsi_target *ct) 2285{ 2286 2287 refcount_acquire(&ct->ct_refcount); 2288} 2289 2290static void 2291cfiscsi_target_release(struct cfiscsi_target *ct) 2292{ 2293 struct cfiscsi_softc *softc; 2294 2295 softc = ct->ct_softc; 2296 mtx_lock(&softc->lock); 2297 if (refcount_release(&ct->ct_refcount)) { 2298 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2299 mtx_unlock(&softc->lock); 2300 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2301 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2302 if (ctl_port_deregister(&ct->ct_port) != 0) 2303 printf("%s: ctl_port_deregister() failed\n", 2304 __func__); 2305 } 2306 free(ct, M_CFISCSI); 2307 2308 return; 2309 } 2310 mtx_unlock(&softc->lock); 2311} 2312 2313static struct cfiscsi_target * 2314cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2315{ 2316 struct cfiscsi_target *ct; 2317 2318 mtx_lock(&softc->lock); 2319 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2320 if (ct->ct_tag != tag || 2321 strcmp(name, ct->ct_name) != 0 || 2322 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2323 continue; 2324 cfiscsi_target_hold(ct); 2325 mtx_unlock(&softc->lock); 2326 return (ct); 2327 } 2328 mtx_unlock(&softc->lock); 2329 2330 return (NULL); 2331} 2332 2333static struct cfiscsi_target * 2334cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2335 const char *alias, uint16_t tag) 2336{ 2337 struct cfiscsi_target *ct, *newct; 2338 2339 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2340 return (NULL); 2341 2342 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2343 2344 mtx_lock(&softc->lock); 2345 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2346 if (ct->ct_tag != tag || 2347 strcmp(name, ct->ct_name) != 0 || 2348 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2349 continue; 2350 cfiscsi_target_hold(ct); 2351 mtx_unlock(&softc->lock); 2352 free(newct, M_CFISCSI); 2353 return (ct); 2354 } 2355 2356 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2357 if (alias != NULL) 2358 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2359 newct->ct_tag = tag; 2360 refcount_init(&newct->ct_refcount, 1); 2361 newct->ct_softc = softc; 2362 if (TAILQ_EMPTY(&softc->targets)) 2363 softc->last_target_id = 0; 2364 newct->ct_target_id = ++softc->last_target_id; 2365 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2366 mtx_unlock(&softc->lock); 2367 2368 return (newct); 2369} 2370 2371static void 2372cfiscsi_datamove_in(union ctl_io *io) 2373{ 2374 struct cfiscsi_session *cs; 2375 struct icl_pdu *request, *response; 2376 const struct iscsi_bhs_scsi_command *bhssc; 2377 struct iscsi_bhs_data_in *bhsdi; 2378 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2379 size_t len, expected_len, sg_len, buffer_offset; 2380 const char *sg_addr; 2381 int ctl_sg_count, error, i; 2382 2383 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2384 cs = PDU_SESSION(request); 2385 2386 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2387 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2388 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2389 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2390 2391 if (io->scsiio.kern_sg_entries > 0) { 2392 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2393 ctl_sg_count = io->scsiio.kern_sg_entries; 2394 } else { 2395 ctl_sglist = &ctl_sg_entry; 2396 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2397 ctl_sglist->len = io->scsiio.kern_data_len; 2398 ctl_sg_count = 1; 2399 } 2400 2401 /* 2402 * This is the total amount of data to be transferred within the current 2403 * SCSI command. We need to record it so that we can properly report 2404 * underflow/underflow. 2405 */ 2406 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2407 2408 /* 2409 * This is the offset within the current SCSI command; for the first 2410 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2411 * it will be the sum of lengths of previous ones. 2412 */ 2413 buffer_offset = io->scsiio.kern_rel_offset; 2414 2415 /* 2416 * This is the transfer length expected by the initiator. In theory, 2417 * it could be different from the correct amount of data from the SCSI 2418 * point of view, even if that doesn't make any sense. 2419 */ 2420 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2421#if 0 2422 if (expected_len != io->scsiio.kern_total_len) { 2423 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2424 "actual length %zd", expected_len, 2425 (size_t)io->scsiio.kern_total_len); 2426 } 2427#endif 2428 2429 if (buffer_offset >= expected_len) { 2430#if 0 2431 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2432 "already sent the expected len", buffer_offset); 2433#endif 2434 io->scsiio.be_move_done(io); 2435 return; 2436 } 2437 2438 i = 0; 2439 sg_addr = NULL; 2440 sg_len = 0; 2441 response = NULL; 2442 bhsdi = NULL; 2443 for (;;) { 2444 if (response == NULL) { 2445 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2446 if (response == NULL) { 2447 CFISCSI_SESSION_WARN(cs, "failed to " 2448 "allocate memory; dropping connection"); 2449 ctl_set_busy(&io->scsiio); 2450 io->scsiio.be_move_done(io); 2451 cfiscsi_session_terminate(cs); 2452 return; 2453 } 2454 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2455 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2456 bhsdi->bhsdi_initiator_task_tag = 2457 bhssc->bhssc_initiator_task_tag; 2458 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2459 PDU_EXPDATASN(request)++; 2460 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2461 } 2462 2463 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2464 if (sg_len == 0) { 2465 sg_addr = ctl_sglist[i].addr; 2466 sg_len = ctl_sglist[i].len; 2467 KASSERT(sg_len > 0, ("sg_len <= 0")); 2468 } 2469 2470 len = sg_len; 2471 2472 /* 2473 * Truncate to maximum data segment length. 2474 */ 2475 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2476 ("ip_data_len %zd >= max_data_segment_length %zd", 2477 response->ip_data_len, cs->cs_max_data_segment_length)); 2478 if (response->ip_data_len + len > 2479 cs->cs_max_data_segment_length) { 2480 len = cs->cs_max_data_segment_length - 2481 response->ip_data_len; 2482 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2483 len, sg_len)); 2484 } 2485 2486 /* 2487 * Truncate to expected data transfer length. 2488 */ 2489 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2490 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2491 buffer_offset, response->ip_data_len, expected_len)); 2492 if (buffer_offset + response->ip_data_len + len > expected_len) { 2493 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2494 "to expected data transfer length %zd", 2495 buffer_offset + response->ip_data_len + len, expected_len); 2496 len = expected_len - (buffer_offset + response->ip_data_len); 2497 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2498 len, sg_len)); 2499 } 2500 2501 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2502 if (error != 0) { 2503 CFISCSI_SESSION_WARN(cs, "failed to " 2504 "allocate memory; dropping connection"); 2505 icl_pdu_free(response); 2506 ctl_set_busy(&io->scsiio); 2507 io->scsiio.be_move_done(io); 2508 cfiscsi_session_terminate(cs); 2509 return; 2510 } 2511 sg_addr += len; 2512 sg_len -= len; 2513 2514 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2515 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2516 buffer_offset, response->ip_data_len, expected_len)); 2517 if (buffer_offset + response->ip_data_len == expected_len) { 2518 /* 2519 * Already have the amount of data the initiator wanted. 2520 */ 2521 break; 2522 } 2523 2524 if (sg_len == 0) { 2525 /* 2526 * End of scatter-gather segment; 2527 * proceed to the next one... 2528 */ 2529 if (i == ctl_sg_count - 1) { 2530 /* 2531 * ... unless this was the last one. 2532 */ 2533 break; 2534 } 2535 i++; 2536 } 2537 2538 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2539 /* 2540 * Can't stuff more data into the current PDU; 2541 * queue it. Note that's not enough to check 2542 * for kern_data_resid == 0 instead; there 2543 * may be several Data-In PDUs for the final 2544 * call to cfiscsi_datamove(), and we want 2545 * to set the F flag only on the last of them. 2546 */ 2547 buffer_offset += response->ip_data_len; 2548 if (buffer_offset == io->scsiio.kern_total_len || 2549 buffer_offset == expected_len) { 2550 buffer_offset -= response->ip_data_len; 2551 break; 2552 } 2553 cfiscsi_pdu_queue(response); 2554 response = NULL; 2555 bhsdi = NULL; 2556 } 2557 } 2558 if (response != NULL) { 2559 buffer_offset += response->ip_data_len; 2560 if (buffer_offset == io->scsiio.kern_total_len || 2561 buffer_offset == expected_len) { 2562 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2563 if (io->io_hdr.status == CTL_SUCCESS) { 2564 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2565 if (PDU_TOTAL_TRANSFER_LEN(request) < 2566 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2567 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2568 bhsdi->bhsdi_residual_count = 2569 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2570 PDU_TOTAL_TRANSFER_LEN(request)); 2571 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2572 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2573 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2574 bhsdi->bhsdi_residual_count = 2575 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2576 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2577 } 2578 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2579 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2580 } 2581 } 2582 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2583 cfiscsi_pdu_queue(response); 2584 } 2585 2586 io->scsiio.be_move_done(io); 2587} 2588 2589static void 2590cfiscsi_datamove_out(union ctl_io *io) 2591{ 2592 struct cfiscsi_session *cs; 2593 struct icl_pdu *request, *response; 2594 const struct iscsi_bhs_scsi_command *bhssc; 2595 struct iscsi_bhs_r2t *bhsr2t; 2596 struct cfiscsi_data_wait *cdw; 2597 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2598 uint32_t expected_len, r2t_off, r2t_len; 2599 uint32_t target_transfer_tag; 2600 bool done; 2601 2602 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2603 cs = PDU_SESSION(request); 2604 2605 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2606 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2607 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2608 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2609 2610 /* 2611 * We need to record it so that we can properly report 2612 * underflow/underflow. 2613 */ 2614 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2615 2616 /* 2617 * Report write underflow as error since CTL and backends don't 2618 * really support it, and SCSI does not tell how to do it right. 2619 */ 2620 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2621 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2622 expected_len) { 2623 io->scsiio.io_hdr.port_status = 43; 2624 io->scsiio.be_move_done(io); 2625 return; 2626 } 2627 2628 target_transfer_tag = 2629 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2630 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2631 &target_transfer_tag); 2632 if (cdw == NULL) { 2633 CFISCSI_SESSION_WARN(cs, "failed to " 2634 "allocate memory; dropping connection"); 2635 ctl_set_busy(&io->scsiio); 2636 io->scsiio.be_move_done(io); 2637 cfiscsi_session_terminate(cs); 2638 return; 2639 } 2640#if 0 2641 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2642 "task tag 0x%x, target transfer tag 0x%x", 2643 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2644#endif 2645 2646 cdw->cdw_ctl_io = io; 2647 cdw->cdw_target_transfer_tag = target_transfer_tag; 2648 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2649 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2650 cdw->cdw_datasn = 0; 2651 2652 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2653 if (io->scsiio.kern_sg_entries > 0) { 2654 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2655 } else { 2656 ctl_sglist = &ctl_sg_entry; 2657 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2658 ctl_sglist->len = io->scsiio.kern_data_len; 2659 } 2660 cdw->cdw_sg_index = 0; 2661 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2662 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2663 r2t_off = io->scsiio.ext_data_filled; 2664 while (r2t_off > 0) { 2665 if (r2t_off >= cdw->cdw_sg_len) { 2666 r2t_off -= cdw->cdw_sg_len; 2667 cdw->cdw_sg_index++; 2668 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2669 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2670 continue; 2671 } 2672 cdw->cdw_sg_addr += r2t_off; 2673 cdw->cdw_sg_len -= r2t_off; 2674 r2t_off = 0; 2675 } 2676 2677 if (cs->cs_immediate_data && 2678 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2679 icl_pdu_data_segment_length(request)) { 2680 done = cfiscsi_handle_data_segment(request, cdw); 2681 if (done) { 2682 cfiscsi_data_wait_free(cs, cdw); 2683 io->scsiio.be_move_done(io); 2684 return; 2685 } 2686 } 2687 2688 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2689 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2690 cs->cs_max_burst_length); 2691 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2692 2693 CFISCSI_SESSION_LOCK(cs); 2694 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2695 CFISCSI_SESSION_UNLOCK(cs); 2696 2697 /* 2698 * XXX: We should limit the number of outstanding R2T PDUs 2699 * per task to MaxOutstandingR2T. 2700 */ 2701 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2702 if (response == NULL) { 2703 CFISCSI_SESSION_WARN(cs, "failed to " 2704 "allocate memory; dropping connection"); 2705 ctl_set_busy(&io->scsiio); 2706 io->scsiio.be_move_done(io); 2707 cfiscsi_session_terminate(cs); 2708 return; 2709 } 2710 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2711 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2712 bhsr2t->bhsr2t_flags = 0x80; 2713 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2714 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2715 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2716 /* 2717 * XXX: Here we assume that cfiscsi_datamove() won't ever 2718 * be running concurrently on several CPUs for a given 2719 * command. 2720 */ 2721 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2722 PDU_R2TSN(request)++; 2723 /* 2724 * This is the offset within the current SCSI command; 2725 * i.e. for the first call of datamove(), it will be 0, 2726 * and for subsequent ones it will be the sum of lengths 2727 * of previous ones. 2728 * 2729 * The ext_data_filled is to account for unsolicited 2730 * (immediate) data that might have already arrived. 2731 */ 2732 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2733 /* 2734 * This is the total length (sum of S/G lengths) this call 2735 * to cfiscsi_datamove() is supposed to handle, limited by 2736 * MaxBurstLength. 2737 */ 2738 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2739 cfiscsi_pdu_queue(response); 2740} 2741 2742static void 2743cfiscsi_datamove(union ctl_io *io) 2744{ 2745 2746 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2747 cfiscsi_datamove_in(io); 2748 else { 2749 /* We hadn't received anything during this datamove yet. */ 2750 io->scsiio.ext_data_filled = 0; 2751 cfiscsi_datamove_out(io); 2752 } 2753} 2754 2755static void 2756cfiscsi_scsi_command_done(union ctl_io *io) 2757{ 2758 struct icl_pdu *request, *response; 2759 struct iscsi_bhs_scsi_command *bhssc; 2760 struct iscsi_bhs_scsi_response *bhssr; 2761#ifdef DIAGNOSTIC 2762 struct cfiscsi_data_wait *cdw; 2763#endif 2764 struct cfiscsi_session *cs; 2765 uint16_t sense_length; 2766 2767 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2768 cs = PDU_SESSION(request); 2769 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2770 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2771 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2772 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2773 2774 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2775 // bhssc->bhssc_initiator_task_tag); 2776 2777#ifdef DIAGNOSTIC 2778 CFISCSI_SESSION_LOCK(cs); 2779 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2780 KASSERT(bhssc->bhssc_initiator_task_tag != 2781 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2782 CFISCSI_SESSION_UNLOCK(cs); 2783#endif 2784 2785 /* 2786 * Do not return status for aborted commands. 2787 * There are exceptions, but none supported by CTL yet. 2788 */ 2789 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2790 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2791 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2792 ctl_free_io(io); 2793 icl_pdu_free(request); 2794 return; 2795 } 2796 2797 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2798 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2799 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2800 bhssr->bhssr_flags = 0x80; 2801 /* 2802 * XXX: We don't deal with bidirectional under/overflows; 2803 * does anything actually support those? 2804 */ 2805 if (PDU_TOTAL_TRANSFER_LEN(request) < 2806 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2807 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2808 bhssr->bhssr_residual_count = 2809 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2810 PDU_TOTAL_TRANSFER_LEN(request)); 2811 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2812 // ntohl(bhssr->bhssr_residual_count)); 2813 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2814 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2815 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2816 bhssr->bhssr_residual_count = 2817 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2818 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2819 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2820 // ntohl(bhssr->bhssr_residual_count)); 2821 } 2822 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2823 bhssr->bhssr_status = io->scsiio.scsi_status; 2824 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2825 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2826 2827 if (io->scsiio.sense_len > 0) { 2828#if 0 2829 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2830 io->scsiio.sense_len); 2831#endif 2832 sense_length = htons(io->scsiio.sense_len); 2833 icl_pdu_append_data(response, 2834 &sense_length, sizeof(sense_length), M_WAITOK); 2835 icl_pdu_append_data(response, 2836 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2837 } 2838 2839 ctl_free_io(io); 2840 icl_pdu_free(request); 2841 cfiscsi_pdu_queue(response); 2842} 2843 2844static void 2845cfiscsi_task_management_done(union ctl_io *io) 2846{ 2847 struct icl_pdu *request, *response; 2848 struct iscsi_bhs_task_management_request *bhstmr; 2849 struct iscsi_bhs_task_management_response *bhstmr2; 2850 struct cfiscsi_data_wait *cdw, *tmpcdw; 2851 struct cfiscsi_session *cs, *tcs; 2852 struct cfiscsi_softc *softc; 2853 int cold_reset = 0; 2854 2855 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2856 cs = PDU_SESSION(request); 2857 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2858 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2859 ISCSI_BHS_OPCODE_TASK_REQUEST, 2860 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2861 2862#if 0 2863 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2864 bhstmr->bhstmr_initiator_task_tag, 2865 bhstmr->bhstmr_referenced_task_tag); 2866#endif 2867 2868 if ((bhstmr->bhstmr_function & ~0x80) == 2869 BHSTMR_FUNCTION_ABORT_TASK) { 2870 /* 2871 * Make sure we no longer wait for Data-Out for this command. 2872 */ 2873 CFISCSI_SESSION_LOCK(cs); 2874 TAILQ_FOREACH_SAFE(cdw, 2875 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2876 if (bhstmr->bhstmr_referenced_task_tag != 2877 cdw->cdw_initiator_task_tag) 2878 continue; 2879 2880#if 0 2881 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2882 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2883#endif 2884 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2885 cdw, cdw_next); 2886 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2887 cfiscsi_data_wait_free(cs, cdw); 2888 } 2889 CFISCSI_SESSION_UNLOCK(cs); 2890 } 2891 if ((bhstmr->bhstmr_function & ~0x80) == 2892 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2893 io->io_hdr.status == CTL_SUCCESS) 2894 cold_reset = 1; 2895 2896 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2897 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2898 response->ip_bhs; 2899 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2900 bhstmr2->bhstmr_flags = 0x80; 2901 if (io->io_hdr.status == CTL_SUCCESS) { 2902 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2903 } else { 2904 /* 2905 * XXX: How to figure out what exactly went wrong? iSCSI spec 2906 * expects us to provide detailed error, e.g. "Task does 2907 * not exist" or "LUN does not exist". 2908 */ 2909 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2910 bhstmr2->bhstmr_response = 2911 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2912 } 2913 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2914 2915 ctl_free_io(io); 2916 icl_pdu_free(request); 2917 cfiscsi_pdu_queue(response); 2918 2919 if (cold_reset) { 2920 softc = cs->cs_target->ct_softc; 2921 mtx_lock(&softc->lock); 2922 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2923 if (tcs->cs_target == cs->cs_target) 2924 cfiscsi_session_terminate(tcs); 2925 } 2926 mtx_unlock(&softc->lock); 2927 } 2928} 2929 2930static void 2931cfiscsi_done(union ctl_io *io) 2932{ 2933 struct icl_pdu *request; 2934 struct cfiscsi_session *cs; 2935 2936 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2937 ("invalid CTL status %#x", io->io_hdr.status)); 2938 2939 if (io->io_hdr.io_type == CTL_IO_TASK && 2940 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2941 /* 2942 * Implicit task termination has just completed; nothing to do. 2943 */ 2944 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2945 cs->cs_tasks_aborted = true; 2946 refcount_release(&cs->cs_outstanding_ctl_pdus); 2947 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2948 ctl_free_io(io); 2949 return; 2950 } 2951 2952 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2953 cs = PDU_SESSION(request); 2954 refcount_release(&cs->cs_outstanding_ctl_pdus); 2955 2956 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2957 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2958 cfiscsi_scsi_command_done(io); 2959 break; 2960 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2961 cfiscsi_task_management_done(io); 2962 break; 2963 default: 2964 panic("cfiscsi_done called with wrong opcode 0x%x", 2965 request->ip_bhs->bhs_opcode); 2966 } 2967} 2968