ctl_frontend_iscsi.c revision 278161
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 278161 2015-02-03 16:17:54Z 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 278161 2015-02-03 16:17:54Z 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_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include <dev/iscsi/icl.h> 71#include <dev/iscsi/icl_wrappers.h> 72#include <dev/iscsi/iscsi_proto.h> 73#include <cam/ctl/ctl_frontend_iscsi.h> 74 75#ifdef ICL_KERNEL_PROXY 76#include <sys/socketvar.h> 77#endif 78 79#ifdef ICL_KERNEL_PROXY 80FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 81#endif 82 83static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 84static uma_zone_t cfiscsi_data_wait_zone; 85 86SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 87 "CAM Target Layer iSCSI Frontend"); 88static int debug = 1; 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 93 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 94static int login_timeout = 60; 95SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 96 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 97static int maxcmdsn_delta = 256; 98SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 99 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 100 "without confirmation"); 101 102#define CFISCSI_DEBUG(X, ...) \ 103 do { \ 104 if (debug > 1) { \ 105 printf("%s: " X "\n", \ 106 __func__, ## __VA_ARGS__); \ 107 } \ 108 } while (0) 109 110#define CFISCSI_WARN(X, ...) \ 111 do { \ 112 if (debug > 0) { \ 113 printf("WARNING: %s: " X "\n", \ 114 __func__, ## __VA_ARGS__); \ 115 } \ 116 } while (0) 117 118#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 119 do { \ 120 if (debug > 1) { \ 121 printf("%s: %s (%s): " X "\n", \ 122 __func__, S->cs_initiator_addr, \ 123 S->cs_initiator_name, ## __VA_ARGS__); \ 124 } \ 125 } while (0) 126 127#define CFISCSI_SESSION_WARN(S, X, ...) \ 128 do { \ 129 if (debug > 0) { \ 130 printf("WARNING: %s (%s): " X "\n", \ 131 S->cs_initiator_addr, \ 132 S->cs_initiator_name, ## __VA_ARGS__); \ 133 } \ 134 } while (0) 135 136#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 137#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 138#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 139 140#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 141#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 142#define PDU_EXPDATASN(X) (X)->ip_prv0 143#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 144#define PDU_R2TSN(X) (X)->ip_prv2 145 146int cfiscsi_init(void); 147static void cfiscsi_online(void *arg); 148static void cfiscsi_offline(void *arg); 149static int cfiscsi_info(void *arg, struct sbuf *sb); 150static int cfiscsi_lun_enable(void *arg, 151 struct ctl_id target_id, int lun_id); 152static int cfiscsi_lun_disable(void *arg, 153 struct ctl_id target_id, int lun_id); 154static int cfiscsi_ioctl(struct cdev *dev, 155 u_long cmd, caddr_t addr, int flag, struct thread *td); 156static void cfiscsi_datamove(union ctl_io *io); 157static void cfiscsi_datamove_in(union ctl_io *io); 158static void cfiscsi_datamove_out(union ctl_io *io); 159static void cfiscsi_done(union ctl_io *io); 160static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 161static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 162static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 163static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 164static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 165static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 166static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 167static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 168 *softc, const char *name, uint16_t tag); 169static struct cfiscsi_target *cfiscsi_target_find_or_create( 170 struct cfiscsi_softc *softc, const char *name, const char *alias, 171 uint16_t tag); 172static void cfiscsi_target_release(struct cfiscsi_target *ct); 173static void cfiscsi_session_delete(struct cfiscsi_session *cs); 174 175static struct cfiscsi_softc cfiscsi_softc; 176extern struct ctl_softc *control_softc; 177 178static struct ctl_frontend cfiscsi_frontend = 179{ 180 .name = "iscsi", 181 .init = cfiscsi_init, 182 .ioctl = cfiscsi_ioctl, 183}; 184CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 185MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 186 187static struct icl_pdu * 188cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 189{ 190 191 return (icl_pdu_new(request->ip_conn, flags)); 192} 193 194static bool 195cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 196{ 197 const struct iscsi_bhs_scsi_command *bhssc; 198 struct cfiscsi_session *cs; 199 uint32_t cmdsn, expstatsn; 200 201 cs = PDU_SESSION(request); 202 203 /* 204 * Every incoming PDU - not just NOP-Out - resets the ping timer. 205 * The purpose of the timeout is to reset the connection when it stalls; 206 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 207 * in some queue. 208 * 209 * XXX: Locking? 210 */ 211 cs->cs_timeout = 0; 212 213 /* 214 * Data-Out PDUs don't contain CmdSN. 215 */ 216 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 217 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 218 return (false); 219 220 /* 221 * We're only using fields common for all the request 222 * (initiator -> target) PDUs. 223 */ 224 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 225 cmdsn = ntohl(bhssc->bhssc_cmdsn); 226 expstatsn = ntohl(bhssc->bhssc_expstatsn); 227 228 CFISCSI_SESSION_LOCK(cs); 229#if 0 230 if (expstatsn != cs->cs_statsn) { 231 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 232 "while current StatSN is %d", expstatsn, 233 cs->cs_statsn); 234 } 235#endif 236 237 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 238 /* 239 * The target MUST silently ignore any non-immediate command 240 * outside of this range. 241 */ 242 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 243 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 244 CFISCSI_SESSION_UNLOCK(cs); 245 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 246 "while expected %u", cmdsn, cs->cs_cmdsn); 247 return (true); 248 } 249 250 /* 251 * We don't support multiple connections now, so any 252 * discontinuity in CmdSN means lost PDUs. Since we don't 253 * support PDU retransmission -- terminate the connection. 254 */ 255 if (cmdsn != cs->cs_cmdsn) { 256 CFISCSI_SESSION_UNLOCK(cs); 257 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 258 "while expected %u; dropping connection", 259 cmdsn, cs->cs_cmdsn); 260 cfiscsi_session_terminate(cs); 261 return (true); 262 } 263 cs->cs_cmdsn++; 264 } 265 266 CFISCSI_SESSION_UNLOCK(cs); 267 268 return (false); 269} 270 271static void 272cfiscsi_pdu_handle(struct icl_pdu *request) 273{ 274 struct cfiscsi_session *cs; 275 bool ignore; 276 277 cs = PDU_SESSION(request); 278 279 ignore = cfiscsi_pdu_update_cmdsn(request); 280 if (ignore) { 281 icl_pdu_free(request); 282 return; 283 } 284 285 /* 286 * Handle the PDU; this includes e.g. receiving the remaining 287 * part of PDU and submitting the SCSI command to CTL 288 * or queueing a reply. The handling routine is responsible 289 * for freeing the PDU when it's no longer needed. 290 */ 291 switch (request->ip_bhs->bhs_opcode & 292 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 293 case ISCSI_BHS_OPCODE_NOP_OUT: 294 cfiscsi_pdu_handle_nop_out(request); 295 break; 296 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 297 cfiscsi_pdu_handle_scsi_command(request); 298 break; 299 case ISCSI_BHS_OPCODE_TASK_REQUEST: 300 cfiscsi_pdu_handle_task_request(request); 301 break; 302 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 303 cfiscsi_pdu_handle_data_out(request); 304 break; 305 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 306 cfiscsi_pdu_handle_logout_request(request); 307 break; 308 default: 309 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 310 "opcode 0x%x; dropping connection", 311 request->ip_bhs->bhs_opcode); 312 icl_pdu_free(request); 313 cfiscsi_session_terminate(cs); 314 } 315 316} 317 318static void 319cfiscsi_receive_callback(struct icl_pdu *request) 320{ 321 struct cfiscsi_session *cs; 322 323 cs = PDU_SESSION(request); 324 325#ifdef ICL_KERNEL_PROXY 326 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 327 if (cs->cs_login_pdu == NULL) 328 cs->cs_login_pdu = request; 329 else 330 icl_pdu_free(request); 331 cv_signal(&cs->cs_login_cv); 332 return; 333 } 334#endif 335 336 cfiscsi_pdu_handle(request); 337} 338 339static void 340cfiscsi_error_callback(struct icl_conn *ic) 341{ 342 struct cfiscsi_session *cs; 343 344 cs = CONN_SESSION(ic); 345 346 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 347 cfiscsi_session_terminate(cs); 348} 349 350static int 351cfiscsi_pdu_prepare(struct icl_pdu *response) 352{ 353 struct cfiscsi_session *cs; 354 struct iscsi_bhs_scsi_response *bhssr; 355 bool advance_statsn = true; 356 357 cs = PDU_SESSION(response); 358 359 CFISCSI_SESSION_LOCK_ASSERT(cs); 360 361 /* 362 * We're only using fields common for all the response 363 * (target -> initiator) PDUs. 364 */ 365 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 366 367 /* 368 * 10.8.3: "The StatSN for this connection is not advanced 369 * after this PDU is sent." 370 */ 371 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 372 advance_statsn = false; 373 374 /* 375 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 376 * StatSN for the connection is not advanced after this PDU is sent." 377 */ 378 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 379 bhssr->bhssr_initiator_task_tag == 0xffffffff) 380 advance_statsn = false; 381 382 /* 383 * See the comment below - StatSN is not meaningful and must 384 * not be advanced. 385 */ 386 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 387 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 388 advance_statsn = false; 389 390 /* 391 * 10.7.3: "The fields StatSN, Status, and Residual Count 392 * only have meaningful content if the S bit is set to 1." 393 */ 394 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 395 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 396 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 397 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 398 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 399 400 if (advance_statsn) 401 cs->cs_statsn++; 402 403 return (0); 404} 405 406static void 407cfiscsi_pdu_queue(struct icl_pdu *response) 408{ 409 struct cfiscsi_session *cs; 410 411 cs = PDU_SESSION(response); 412 413 CFISCSI_SESSION_LOCK(cs); 414 cfiscsi_pdu_prepare(response); 415 icl_pdu_queue(response); 416 CFISCSI_SESSION_UNLOCK(cs); 417} 418 419static uint32_t 420cfiscsi_decode_lun(uint64_t encoded) 421{ 422 uint8_t lun[8]; 423 uint32_t result; 424 425 /* 426 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 427 * but is in fact an evil, multidimensional structure defined 428 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 429 */ 430 memcpy(lun, &encoded, sizeof(lun)); 431 switch (lun[0] & 0xC0) { 432 case 0x00: 433 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 434 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 435 CFISCSI_WARN("malformed LUN " 436 "(peripheral device addressing method): 0x%jx", 437 (uintmax_t)encoded); 438 result = 0xffffffff; 439 break; 440 } 441 result = lun[1]; 442 break; 443 case 0x40: 444 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 445 lun[6] != 0 || lun[7] != 0) { 446 CFISCSI_WARN("malformed LUN " 447 "(flat address space addressing method): 0x%jx", 448 (uintmax_t)encoded); 449 result = 0xffffffff; 450 break; 451 } 452 result = ((lun[0] & 0x3f) << 8) + lun[1]; 453 break; 454 case 0xC0: 455 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 456 lun[6] != 0 || lun[7] != 0) { 457 CFISCSI_WARN("malformed LUN (extended flat " 458 "address space addressing method): 0x%jx", 459 (uintmax_t)encoded); 460 result = 0xffffffff; 461 break; 462 } 463 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 464 default: 465 CFISCSI_WARN("unsupported LUN format 0x%jx", 466 (uintmax_t)encoded); 467 result = 0xffffffff; 468 break; 469 } 470 471 return (result); 472} 473 474static void 475cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 476{ 477 struct cfiscsi_session *cs; 478 struct iscsi_bhs_nop_out *bhsno; 479 struct iscsi_bhs_nop_in *bhsni; 480 struct icl_pdu *response; 481 void *data = NULL; 482 size_t datasize; 483 int error; 484 485 cs = PDU_SESSION(request); 486 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 487 488 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 489 /* 490 * Nothing to do, iscsi_pdu_update_statsn() already 491 * zeroed the timeout. 492 */ 493 icl_pdu_free(request); 494 return; 495 } 496 497 datasize = icl_pdu_data_segment_length(request); 498 if (datasize > 0) { 499 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 500 if (data == NULL) { 501 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 502 "dropping connection"); 503 icl_pdu_free(request); 504 cfiscsi_session_terminate(cs); 505 return; 506 } 507 icl_pdu_get_data(request, 0, data, datasize); 508 } 509 510 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 511 if (response == NULL) { 512 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 513 "droppping connection"); 514 free(data, M_CFISCSI); 515 icl_pdu_free(request); 516 cfiscsi_session_terminate(cs); 517 return; 518 } 519 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 520 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 521 bhsni->bhsni_flags = 0x80; 522 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 523 bhsni->bhsni_target_transfer_tag = 0xffffffff; 524 if (datasize > 0) { 525 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 526 if (error != 0) { 527 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 528 "dropping connection"); 529 free(data, M_CFISCSI); 530 icl_pdu_free(request); 531 icl_pdu_free(response); 532 cfiscsi_session_terminate(cs); 533 return; 534 } 535 free(data, M_CFISCSI); 536 } 537 538 icl_pdu_free(request); 539 cfiscsi_pdu_queue(response); 540} 541 542static void 543cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 544{ 545 struct iscsi_bhs_scsi_command *bhssc; 546 struct cfiscsi_session *cs; 547 union ctl_io *io; 548 int error; 549 550 cs = PDU_SESSION(request); 551 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 552 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 553 // bhssc->bhssc_initiator_task_tag); 554 555 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 556 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 557 "ImmediateData=No; dropping connection"); 558 icl_pdu_free(request); 559 cfiscsi_session_terminate(cs); 560 return; 561 } 562 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 563 ctl_zero_io(io); 564 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 565 io->io_hdr.io_type = CTL_IO_SCSI; 566 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 567 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 568 io->io_hdr.nexus.targ_target.id = 0; 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.id = cs->cs_ctl_initid; 624 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 625 io->io_hdr.nexus.targ_target.id = 0; 626 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 627 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 628 629 switch (bhstmr->bhstmr_function & ~0x80) { 630 case BHSTMR_FUNCTION_ABORT_TASK: 631#if 0 632 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 633#endif 634 io->taskio.task_action = CTL_TASK_ABORT_TASK; 635 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 636 break; 637 case BHSTMR_FUNCTION_ABORT_TASK_SET: 638#if 0 639 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 640#endif 641 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 642 break; 643 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 644#if 0 645 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 646#endif 647 io->taskio.task_action = CTL_TASK_LUN_RESET; 648 break; 649 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 650#if 0 651 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 652#endif 653 io->taskio.task_action = CTL_TASK_TARGET_RESET; 654 break; 655 default: 656 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 657 bhstmr->bhstmr_function & ~0x80); 658 ctl_free_io(io); 659 660 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 661 if (response == NULL) { 662 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 663 "dropping connection"); 664 icl_pdu_free(request); 665 cfiscsi_session_terminate(cs); 666 return; 667 } 668 bhstmr2 = (struct iscsi_bhs_task_management_response *) 669 response->ip_bhs; 670 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 671 bhstmr2->bhstmr_flags = 0x80; 672 bhstmr2->bhstmr_response = 673 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 674 bhstmr2->bhstmr_initiator_task_tag = 675 bhstmr->bhstmr_initiator_task_tag; 676 icl_pdu_free(request); 677 cfiscsi_pdu_queue(response); 678 return; 679 } 680 681 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 682 error = ctl_queue(io); 683 if (error != CTL_RETVAL_COMPLETE) { 684 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 685 "dropping connection", error); 686 ctl_free_io(io); 687 refcount_release(&cs->cs_outstanding_ctl_pdus); 688 icl_pdu_free(request); 689 cfiscsi_session_terminate(cs); 690 } 691} 692 693static bool 694cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 695{ 696 struct iscsi_bhs_data_out *bhsdo; 697 struct cfiscsi_session *cs; 698 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 699 size_t copy_len, len, off, buffer_offset; 700 int ctl_sg_count; 701 union ctl_io *io; 702 703 cs = PDU_SESSION(request); 704 705 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 706 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 707 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 708 ISCSI_BHS_OPCODE_SCSI_COMMAND, 709 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 710 711 /* 712 * We're only using fields common for Data-Out and SCSI Command PDUs. 713 */ 714 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 715 716 io = cdw->cdw_ctl_io; 717 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 718 ("CTL_FLAG_DATA_IN")); 719 720#if 0 721 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 722 request->ip_data_len, io->scsiio.kern_total_len); 723#endif 724 725 if (io->scsiio.kern_sg_entries > 0) { 726 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 727 ctl_sg_count = io->scsiio.kern_sg_entries; 728 } else { 729 ctl_sglist = &ctl_sg_entry; 730 ctl_sglist->addr = io->scsiio.kern_data_ptr; 731 ctl_sglist->len = io->scsiio.kern_data_len; 732 ctl_sg_count = 1; 733 } 734 735 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 736 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 737 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 738 else 739 buffer_offset = 0; 740 len = icl_pdu_data_segment_length(request); 741 742 /* 743 * Make sure the offset, as sent by the initiator, matches the offset 744 * we're supposed to be at in the scatter-gather list. 745 */ 746 if (buffer_offset > 747 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 748 buffer_offset + len <= 749 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 750 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 751 "expected %zd; dropping connection", buffer_offset, 752 (size_t)io->scsiio.kern_rel_offset + 753 (size_t)io->scsiio.ext_data_filled); 754 ctl_set_data_phase_error(&io->scsiio); 755 cfiscsi_session_terminate(cs); 756 return (true); 757 } 758 759 /* 760 * This is the offset within the PDU data segment, as opposed 761 * to buffer_offset, which is the offset within the task (SCSI 762 * command). 763 */ 764 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 765 buffer_offset; 766 767 /* 768 * Iterate over the scatter/gather segments, filling them with data 769 * from the PDU data segment. Note that this can get called multiple 770 * times for one SCSI command; the cdw structure holds state for the 771 * scatter/gather list. 772 */ 773 for (;;) { 774 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 775 ("cdw->cdw_sg_index >= ctl_sg_count")); 776 if (cdw->cdw_sg_len == 0) { 777 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 778 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 779 } 780 KASSERT(off <= len, ("len > off")); 781 copy_len = len - off; 782 if (copy_len > cdw->cdw_sg_len) 783 copy_len = cdw->cdw_sg_len; 784 785 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 786 cdw->cdw_sg_addr += copy_len; 787 cdw->cdw_sg_len -= copy_len; 788 off += copy_len; 789 io->scsiio.ext_data_filled += copy_len; 790 791 if (cdw->cdw_sg_len == 0) { 792 /* 793 * End of current segment. 794 */ 795 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 796 /* 797 * Last segment in scatter/gather list. 798 */ 799 break; 800 } 801 cdw->cdw_sg_index++; 802 } 803 804 if (off == len) { 805 /* 806 * End of PDU payload. 807 */ 808 break; 809 } 810 } 811 812 if (len > off) { 813 /* 814 * In case of unsolicited data, it's possible that the buffer 815 * provided by CTL is smaller than negotiated FirstBurstLength. 816 * Just ignore the superfluous data; will ask for them with R2T 817 * on next call to cfiscsi_datamove(). 818 * 819 * This obviously can only happen with SCSI Command PDU. 820 */ 821 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 822 ISCSI_BHS_OPCODE_SCSI_COMMAND) 823 return (true); 824 825 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 826 "expected %zd; dropping connection", 827 icl_pdu_data_segment_length(request), off); 828 ctl_set_data_phase_error(&io->scsiio); 829 cfiscsi_session_terminate(cs); 830 return (true); 831 } 832 833 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 834 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 835 CFISCSI_SESSION_WARN(cs, "got the final packet without " 836 "the F flag; flags = 0x%x; dropping connection", 837 bhsdo->bhsdo_flags); 838 ctl_set_data_phase_error(&io->scsiio); 839 cfiscsi_session_terminate(cs); 840 return (true); 841 } 842 843 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 844 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 845 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 846 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 847 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 848 "transmitted size was %zd bytes instead of %d; " 849 "dropping connection", 850 (size_t)io->scsiio.ext_data_filled, 851 cdw->cdw_r2t_end); 852 ctl_set_data_phase_error(&io->scsiio); 853 cfiscsi_session_terminate(cs); 854 return (true); 855 } else { 856 /* 857 * For SCSI Command PDU, this just means we need to 858 * solicit more data by sending R2T. 859 */ 860 return (false); 861 } 862 } 863 864 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 865#if 0 866 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 867 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 868#endif 869 870 return (true); 871 } 872 873 return (false); 874} 875 876static void 877cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 878{ 879 struct iscsi_bhs_data_out *bhsdo; 880 struct cfiscsi_session *cs; 881 struct cfiscsi_data_wait *cdw = NULL; 882 union ctl_io *io; 883 bool done; 884 885 cs = PDU_SESSION(request); 886 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 887 888 CFISCSI_SESSION_LOCK(cs); 889 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 890#if 0 891 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 892 "ttt 0x%x, itt 0x%x", 893 bhsdo->bhsdo_target_transfer_tag, 894 bhsdo->bhsdo_initiator_task_tag, 895 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 896#endif 897 if (bhsdo->bhsdo_target_transfer_tag == 898 cdw->cdw_target_transfer_tag) 899 break; 900 } 901 CFISCSI_SESSION_UNLOCK(cs); 902 if (cdw == NULL) { 903 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 904 "0x%x, not found; dropping connection", 905 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 906 icl_pdu_free(request); 907 cfiscsi_session_terminate(cs); 908 return; 909 } 910 911 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 912 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 913 "DataSN %u, while expected %u; dropping connection", 914 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 915 icl_pdu_free(request); 916 cfiscsi_session_terminate(cs); 917 return; 918 } 919 cdw->cdw_datasn++; 920 921 io = cdw->cdw_ctl_io; 922 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 923 ("CTL_FLAG_DATA_IN")); 924 925 done = cfiscsi_handle_data_segment(request, cdw); 926 if (done) { 927 CFISCSI_SESSION_LOCK(cs); 928 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 929 CFISCSI_SESSION_UNLOCK(cs); 930 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 931 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 932 uma_zfree(cfiscsi_data_wait_zone, cdw); 933 if (done) 934 io->scsiio.be_move_done(io); 935 else 936 cfiscsi_datamove_out(io); 937 } 938 939 icl_pdu_free(request); 940} 941 942static void 943cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 944{ 945 struct iscsi_bhs_logout_request *bhslr; 946 struct iscsi_bhs_logout_response *bhslr2; 947 struct icl_pdu *response; 948 struct cfiscsi_session *cs; 949 950 cs = PDU_SESSION(request); 951 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 952 switch (bhslr->bhslr_reason & 0x7f) { 953 case BHSLR_REASON_CLOSE_SESSION: 954 case BHSLR_REASON_CLOSE_CONNECTION: 955 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 956 if (response == NULL) { 957 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 958 icl_pdu_free(request); 959 cfiscsi_session_terminate(cs); 960 return; 961 } 962 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 963 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 964 bhslr2->bhslr_flags = 0x80; 965 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 966 bhslr2->bhslr_initiator_task_tag = 967 bhslr->bhslr_initiator_task_tag; 968 icl_pdu_free(request); 969 cfiscsi_pdu_queue(response); 970 cfiscsi_session_terminate(cs); 971 break; 972 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 973 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 974 if (response == NULL) { 975 CFISCSI_SESSION_WARN(cs, 976 "failed to allocate memory; dropping connection"); 977 icl_pdu_free(request); 978 cfiscsi_session_terminate(cs); 979 return; 980 } 981 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 982 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 983 bhslr2->bhslr_flags = 0x80; 984 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 985 bhslr2->bhslr_initiator_task_tag = 986 bhslr->bhslr_initiator_task_tag; 987 icl_pdu_free(request); 988 cfiscsi_pdu_queue(response); 989 break; 990 default: 991 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 992 bhslr->bhslr_reason); 993 icl_pdu_free(request); 994 cfiscsi_session_terminate(cs); 995 break; 996 } 997} 998 999static void 1000cfiscsi_callout(void *context) 1001{ 1002 struct icl_pdu *cp; 1003 struct iscsi_bhs_nop_in *bhsni; 1004 struct cfiscsi_session *cs; 1005 1006 cs = context; 1007 1008 if (cs->cs_terminating) 1009 return; 1010 1011 callout_schedule(&cs->cs_callout, 1 * hz); 1012 1013 atomic_add_int(&cs->cs_timeout, 1); 1014 1015#ifdef ICL_KERNEL_PROXY 1016 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1017 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1018 CFISCSI_SESSION_WARN(cs, "login timed out after " 1019 "%d seconds; dropping connection", cs->cs_timeout); 1020 cfiscsi_session_terminate(cs); 1021 } 1022 return; 1023 } 1024#endif 1025 1026 if (ping_timeout <= 0) { 1027 /* 1028 * Pings are disabled. Don't send NOP-In in this case; 1029 * user might have disabled pings to work around problems 1030 * with certain initiators that can't properly handle 1031 * NOP-In, such as iPXE. Reset the timeout, to avoid 1032 * triggering reconnection, should the user decide to 1033 * reenable them. 1034 */ 1035 cs->cs_timeout = 0; 1036 return; 1037 } 1038 1039 if (cs->cs_timeout >= ping_timeout) { 1040 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1041 "dropping connection", ping_timeout); 1042 cfiscsi_session_terminate(cs); 1043 return; 1044 } 1045 1046 /* 1047 * If the ping was reset less than one second ago - which means 1048 * that we've received some PDU during the last second - assume 1049 * the traffic flows correctly and don't bother sending a NOP-Out. 1050 * 1051 * (It's 2 - one for one second, and one for incrementing is_timeout 1052 * earlier in this routine.) 1053 */ 1054 if (cs->cs_timeout < 2) 1055 return; 1056 1057 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1058 if (cp == NULL) { 1059 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1060 return; 1061 } 1062 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1063 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1064 bhsni->bhsni_flags = 0x80; 1065 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1066 1067 cfiscsi_pdu_queue(cp); 1068} 1069 1070static void 1071cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1072{ 1073 struct cfiscsi_data_wait *cdw; 1074 union ctl_io *io; 1075 int error, last, wait; 1076 1077 if (cs->cs_target == NULL) 1078 return; /* No target yet, so nothing to do. */ 1079 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1080 ctl_zero_io(io); 1081 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1082 io->io_hdr.io_type = CTL_IO_TASK; 1083 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1084 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1085 io->io_hdr.nexus.targ_target.id = 0; 1086 io->io_hdr.nexus.targ_lun = 0; 1087 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1088 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1089 wait = cs->cs_outstanding_ctl_pdus; 1090 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1091 error = ctl_queue(io); 1092 if (error != CTL_RETVAL_COMPLETE) { 1093 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1094 refcount_release(&cs->cs_outstanding_ctl_pdus); 1095 ctl_free_io(io); 1096 } 1097 1098 CFISCSI_SESSION_LOCK(cs); 1099 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1100 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1101 CFISCSI_SESSION_UNLOCK(cs); 1102 /* 1103 * Set nonzero port status; this prevents backends from 1104 * assuming that the data transfer actually succeeded 1105 * and writing uninitialized data to disk. 1106 */ 1107 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1108 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1109 uma_zfree(cfiscsi_data_wait_zone, cdw); 1110 CFISCSI_SESSION_LOCK(cs); 1111 } 1112 CFISCSI_SESSION_UNLOCK(cs); 1113 1114 /* 1115 * Wait for CTL to terminate all the tasks. 1116 */ 1117 if (wait > 0) 1118 CFISCSI_SESSION_WARN(cs, 1119 "waiting for CTL to terminate %d tasks", wait); 1120 for (;;) { 1121 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1122 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1123 if (last != 0) 1124 break; 1125 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1126 0, "cfiscsi_terminate", hz / 100); 1127 } 1128 if (wait > 0) 1129 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1130} 1131 1132static void 1133cfiscsi_maintenance_thread(void *arg) 1134{ 1135 struct cfiscsi_session *cs; 1136 1137 cs = arg; 1138 1139 for (;;) { 1140 CFISCSI_SESSION_LOCK(cs); 1141 if (cs->cs_terminating == false) 1142 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1143 CFISCSI_SESSION_UNLOCK(cs); 1144 1145 if (cs->cs_terminating) { 1146 1147 /* 1148 * We used to wait up to 30 seconds to deliver queued 1149 * PDUs to the initiator. We also tried hard to deliver 1150 * SCSI Responses for the aborted PDUs. We don't do 1151 * that anymore. We might need to revisit that. 1152 */ 1153 callout_drain(&cs->cs_callout); 1154 icl_conn_close(cs->cs_conn); 1155 1156 /* 1157 * At this point ICL receive thread is no longer 1158 * running; no new tasks can be queued. 1159 */ 1160 cfiscsi_session_terminate_tasks(cs); 1161 cfiscsi_session_delete(cs); 1162 kthread_exit(); 1163 return; 1164 } 1165 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1166 } 1167} 1168 1169static void 1170cfiscsi_session_terminate(struct cfiscsi_session *cs) 1171{ 1172 1173 if (cs->cs_terminating) 1174 return; 1175 cs->cs_terminating = true; 1176 cv_signal(&cs->cs_maintenance_cv); 1177#ifdef ICL_KERNEL_PROXY 1178 cv_signal(&cs->cs_login_cv); 1179#endif 1180} 1181 1182static int 1183cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1184{ 1185 struct cfiscsi_target *ct; 1186 char *name; 1187 int i; 1188 1189 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1190 1191 ct = cs->cs_target; 1192 name = strdup(cs->cs_initiator_id, M_CTL); 1193 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1194 if (i < 0) { 1195 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1196 i); 1197 cs->cs_ctl_initid = -1; 1198 return (1); 1199 } 1200 cs->cs_ctl_initid = i; 1201#if 0 1202 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1203#endif 1204 1205 return (0); 1206} 1207 1208static void 1209cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1210{ 1211 int error; 1212 1213 if (cs->cs_ctl_initid == -1) 1214 return; 1215 1216 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1217 if (error != 0) { 1218 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1219 error); 1220 } 1221 cs->cs_ctl_initid = -1; 1222} 1223 1224static struct cfiscsi_session * 1225cfiscsi_session_new(struct cfiscsi_softc *softc) 1226{ 1227 struct cfiscsi_session *cs; 1228 int error; 1229 1230 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1231 if (cs == NULL) { 1232 CFISCSI_WARN("malloc failed"); 1233 return (NULL); 1234 } 1235 cs->cs_ctl_initid = -1; 1236 1237 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1238 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1239 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1240 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1241#ifdef ICL_KERNEL_PROXY 1242 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1243#endif 1244 1245 cs->cs_conn = icl_new_conn(NULL, "cfiscsi", &cs->cs_lock); 1246 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1247 cs->cs_conn->ic_error = cfiscsi_error_callback; 1248 cs->cs_conn->ic_prv0 = cs; 1249 1250 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1251 if (error != 0) { 1252 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1253 free(cs, M_CFISCSI); 1254 return (NULL); 1255 } 1256 1257 mtx_lock(&softc->lock); 1258 cs->cs_id = ++softc->last_session_id; 1259 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1260 mtx_unlock(&softc->lock); 1261 1262 /* 1263 * Start pinging the initiator. 1264 */ 1265 callout_init(&cs->cs_callout, 1); 1266 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1267 1268 return (cs); 1269} 1270 1271static void 1272cfiscsi_session_delete(struct cfiscsi_session *cs) 1273{ 1274 struct cfiscsi_softc *softc; 1275 1276 softc = &cfiscsi_softc; 1277 1278 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1279 ("destroying session with outstanding CTL pdus")); 1280 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1281 ("destroying session with non-empty queue")); 1282 1283 cfiscsi_session_unregister_initiator(cs); 1284 if (cs->cs_target != NULL) 1285 cfiscsi_target_release(cs->cs_target); 1286 icl_conn_close(cs->cs_conn); 1287 icl_conn_free(cs->cs_conn); 1288 1289 mtx_lock(&softc->lock); 1290 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1291 cv_signal(&softc->sessions_cv); 1292 mtx_unlock(&softc->lock); 1293 1294 free(cs, M_CFISCSI); 1295} 1296 1297int 1298cfiscsi_init(void) 1299{ 1300 struct cfiscsi_softc *softc; 1301 int retval; 1302 1303 softc = &cfiscsi_softc; 1304 retval = 0; 1305 bzero(softc, sizeof(*softc)); 1306 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1307 1308 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1309#ifdef ICL_KERNEL_PROXY 1310 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1311#endif 1312 TAILQ_INIT(&softc->sessions); 1313 TAILQ_INIT(&softc->targets); 1314 1315 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1316 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1317 UMA_ALIGN_PTR, 0); 1318 1319 return (0); 1320} 1321 1322#ifdef ICL_KERNEL_PROXY 1323static void 1324cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1325{ 1326 struct cfiscsi_session *cs; 1327 1328 cs = cfiscsi_session_new(&cfiscsi_softc); 1329 if (cs == NULL) { 1330 CFISCSI_WARN("failed to create session"); 1331 return; 1332 } 1333 1334 icl_conn_handoff_sock(cs->cs_conn, so); 1335 cs->cs_initiator_sa = sa; 1336 cs->cs_portal_id = portal_id; 1337 cs->cs_waiting_for_ctld = true; 1338 cv_signal(&cfiscsi_softc.accept_cv); 1339} 1340#endif 1341 1342static void 1343cfiscsi_online(void *arg) 1344{ 1345 struct cfiscsi_softc *softc; 1346 struct cfiscsi_target *ct; 1347 int online; 1348 1349 ct = (struct cfiscsi_target *)arg; 1350 softc = ct->ct_softc; 1351 1352 mtx_lock(&softc->lock); 1353 if (ct->ct_online) { 1354 mtx_unlock(&softc->lock); 1355 return; 1356 } 1357 ct->ct_online = 1; 1358 online = softc->online++; 1359 mtx_unlock(&softc->lock); 1360 if (online > 0) 1361 return; 1362 1363#ifdef ICL_KERNEL_PROXY 1364 if (softc->listener != NULL) 1365 icl_listen_free(softc->listener); 1366 softc->listener = icl_listen_new(cfiscsi_accept); 1367#endif 1368} 1369 1370static void 1371cfiscsi_offline(void *arg) 1372{ 1373 struct cfiscsi_softc *softc; 1374 struct cfiscsi_target *ct; 1375 struct cfiscsi_session *cs; 1376 int online; 1377 1378 ct = (struct cfiscsi_target *)arg; 1379 softc = ct->ct_softc; 1380 1381 mtx_lock(&softc->lock); 1382 if (!ct->ct_online) { 1383 mtx_unlock(&softc->lock); 1384 return; 1385 } 1386 ct->ct_online = 0; 1387 online = --softc->online; 1388 1389 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1390 if (cs->cs_target == ct) 1391 cfiscsi_session_terminate(cs); 1392 } 1393 do { 1394 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1395 if (cs->cs_target == ct) 1396 break; 1397 } 1398 if (cs != NULL) 1399 cv_wait(&softc->sessions_cv, &softc->lock); 1400 } while (cs != NULL && ct->ct_online == 0); 1401 mtx_unlock(&softc->lock); 1402 if (online > 0) 1403 return; 1404 1405#ifdef ICL_KERNEL_PROXY 1406 icl_listen_free(softc->listener); 1407 softc->listener = NULL; 1408#endif 1409} 1410 1411static int 1412cfiscsi_info(void *arg, struct sbuf *sb) 1413{ 1414 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1415 int retval; 1416 1417 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1418 ct->ct_state); 1419 return (retval); 1420} 1421 1422static void 1423cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1424{ 1425 struct cfiscsi_softc *softc; 1426 struct cfiscsi_session *cs, *cs2; 1427 struct cfiscsi_target *ct; 1428 struct ctl_iscsi_handoff_params *cihp; 1429 int error; 1430 1431 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1432 softc = &cfiscsi_softc; 1433 1434 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1435 cihp->initiator_name, cihp->initiator_addr, 1436 cihp->target_name); 1437 1438 ct = cfiscsi_target_find(softc, cihp->target_name, 1439 cihp->portal_group_tag); 1440 if (ct == NULL) { 1441 ci->status = CTL_ISCSI_ERROR; 1442 snprintf(ci->error_str, sizeof(ci->error_str), 1443 "%s: target not found", __func__); 1444 return; 1445 } 1446 1447#ifdef ICL_KERNEL_PROXY 1448 if (cihp->socket > 0 && cihp->connection_id > 0) { 1449 snprintf(ci->error_str, sizeof(ci->error_str), 1450 "both socket and connection_id set"); 1451 ci->status = CTL_ISCSI_ERROR; 1452 cfiscsi_target_release(ct); 1453 return; 1454 } 1455 if (cihp->socket == 0) { 1456 mtx_lock(&cfiscsi_softc.lock); 1457 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1458 if (cs->cs_id == cihp->connection_id) 1459 break; 1460 } 1461 if (cs == NULL) { 1462 mtx_unlock(&cfiscsi_softc.lock); 1463 snprintf(ci->error_str, sizeof(ci->error_str), 1464 "connection not found"); 1465 ci->status = CTL_ISCSI_ERROR; 1466 cfiscsi_target_release(ct); 1467 return; 1468 } 1469 mtx_unlock(&cfiscsi_softc.lock); 1470 } else { 1471#endif 1472 cs = cfiscsi_session_new(softc); 1473 if (cs == NULL) { 1474 ci->status = CTL_ISCSI_ERROR; 1475 snprintf(ci->error_str, sizeof(ci->error_str), 1476 "%s: cfiscsi_session_new failed", __func__); 1477 cfiscsi_target_release(ct); 1478 return; 1479 } 1480#ifdef ICL_KERNEL_PROXY 1481 } 1482#endif 1483 1484 /* 1485 * First PDU of Full Feature phase has the same CmdSN as the last 1486 * PDU from the Login Phase received from the initiator. Thus, 1487 * the -1 below. 1488 */ 1489 cs->cs_cmdsn = cihp->cmdsn; 1490 cs->cs_statsn = cihp->statsn; 1491 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1492 cs->cs_max_burst_length = cihp->max_burst_length; 1493 cs->cs_immediate_data = !!cihp->immediate_data; 1494 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1495 cs->cs_conn->ic_header_crc32c = true; 1496 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1497 cs->cs_conn->ic_data_crc32c = true; 1498 1499 strlcpy(cs->cs_initiator_name, 1500 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1501 strlcpy(cs->cs_initiator_addr, 1502 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1503 strlcpy(cs->cs_initiator_alias, 1504 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1505 memcpy(cs->cs_initiator_isid, 1506 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1507 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1508 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1509 cihp->initiator_isid[0], cihp->initiator_isid[1], 1510 cihp->initiator_isid[2], cihp->initiator_isid[3], 1511 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1512 1513 mtx_lock(&softc->lock); 1514 if (ct->ct_online == 0) { 1515 mtx_unlock(&softc->lock); 1516 cfiscsi_session_terminate(cs); 1517 cfiscsi_target_release(ct); 1518 ci->status = CTL_ISCSI_ERROR; 1519 snprintf(ci->error_str, sizeof(ci->error_str), 1520 "%s: port offline", __func__); 1521 return; 1522 } 1523 cs->cs_target = ct; 1524 mtx_unlock(&softc->lock); 1525 1526 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1527restart: 1528 if (!cs->cs_terminating) { 1529 mtx_lock(&softc->lock); 1530 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1531 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1532 cs->cs_target == cs2->cs_target && 1533 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1534 cfiscsi_session_terminate(cs2); 1535 mtx_unlock(&softc->lock); 1536 pause("cfiscsi_reinstate", 1); 1537 goto restart; 1538 } 1539 } 1540 mtx_unlock(&softc->lock); 1541 } 1542 1543 /* 1544 * Register initiator with CTL. 1545 */ 1546 cfiscsi_session_register_initiator(cs); 1547 1548#ifdef ICL_KERNEL_PROXY 1549 if (cihp->socket > 0) { 1550#endif 1551 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1552 if (error != 0) { 1553 cfiscsi_session_terminate(cs); 1554 refcount_release(&cs->cs_outstanding_ctl_pdus); 1555 ci->status = CTL_ISCSI_ERROR; 1556 snprintf(ci->error_str, sizeof(ci->error_str), 1557 "%s: icl_conn_handoff failed with error %d", 1558 __func__, error); 1559 return; 1560 } 1561#ifdef ICL_KERNEL_PROXY 1562 } 1563#endif 1564 1565#ifdef ICL_KERNEL_PROXY 1566 cs->cs_login_phase = false; 1567 1568 /* 1569 * First PDU of the Full Feature phase has likely already arrived. 1570 * We have to pick it up and execute properly. 1571 */ 1572 if (cs->cs_login_pdu != NULL) { 1573 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1574 cfiscsi_pdu_handle(cs->cs_login_pdu); 1575 cs->cs_login_pdu = NULL; 1576 } 1577#endif 1578 1579 refcount_release(&cs->cs_outstanding_ctl_pdus); 1580 ci->status = CTL_ISCSI_OK; 1581} 1582 1583static void 1584cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1585{ 1586 struct ctl_iscsi_list_params *cilp; 1587 struct cfiscsi_session *cs; 1588 struct cfiscsi_softc *softc; 1589 struct sbuf *sb; 1590 int error; 1591 1592 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1593 softc = &cfiscsi_softc; 1594 1595 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1596 if (sb == NULL) { 1597 ci->status = CTL_ISCSI_ERROR; 1598 snprintf(ci->error_str, sizeof(ci->error_str), 1599 "Unable to allocate %d bytes for iSCSI session list", 1600 cilp->alloc_len); 1601 return; 1602 } 1603 1604 sbuf_printf(sb, "<ctlislist>\n"); 1605 mtx_lock(&softc->lock); 1606 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1607#ifdef ICL_KERNEL_PROXY 1608 if (cs->cs_target == NULL) 1609 continue; 1610#endif 1611 error = sbuf_printf(sb, "<connection id=\"%d\">" 1612 "<initiator>%s</initiator>" 1613 "<initiator_addr>%s</initiator_addr>" 1614 "<initiator_alias>%s</initiator_alias>" 1615 "<target>%s</target>" 1616 "<target_alias>%s</target_alias>" 1617 "<target_portal_group_tag>%u</target_portal_group_tag>" 1618 "<header_digest>%s</header_digest>" 1619 "<data_digest>%s</data_digest>" 1620 "<max_data_segment_length>%zd</max_data_segment_length>" 1621 "<immediate_data>%d</immediate_data>" 1622 "<iser>%d</iser>" 1623 "</connection>\n", 1624 cs->cs_id, 1625 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1626 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1627 cs->cs_target->ct_tag, 1628 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1629 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1630 cs->cs_max_data_segment_length, 1631 cs->cs_immediate_data, 1632 cs->cs_conn->ic_iser); 1633 if (error != 0) 1634 break; 1635 } 1636 mtx_unlock(&softc->lock); 1637 error = sbuf_printf(sb, "</ctlislist>\n"); 1638 if (error != 0) { 1639 sbuf_delete(sb); 1640 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1641 snprintf(ci->error_str, sizeof(ci->error_str), 1642 "Out of space, %d bytes is too small", cilp->alloc_len); 1643 return; 1644 } 1645 sbuf_finish(sb); 1646 1647 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1648 cilp->fill_len = sbuf_len(sb) + 1; 1649 ci->status = CTL_ISCSI_OK; 1650 sbuf_delete(sb); 1651} 1652 1653static void 1654cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1655{ 1656 struct icl_pdu *response; 1657 struct iscsi_bhs_asynchronous_message *bhsam; 1658 struct ctl_iscsi_terminate_params *citp; 1659 struct cfiscsi_session *cs; 1660 struct cfiscsi_softc *softc; 1661 int found = 0; 1662 1663 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1664 softc = &cfiscsi_softc; 1665 1666 mtx_lock(&softc->lock); 1667 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1668 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1669 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1670 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1671 continue; 1672 1673 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1674 if (response == NULL) { 1675 /* 1676 * Oh well. Just terminate the connection. 1677 */ 1678 } else { 1679 bhsam = (struct iscsi_bhs_asynchronous_message *) 1680 response->ip_bhs; 1681 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1682 bhsam->bhsam_flags = 0x80; 1683 bhsam->bhsam_0xffffffff = 0xffffffff; 1684 bhsam->bhsam_async_event = 1685 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1686 cfiscsi_pdu_queue(response); 1687 } 1688 cfiscsi_session_terminate(cs); 1689 found++; 1690 } 1691 mtx_unlock(&softc->lock); 1692 1693 if (found == 0) { 1694 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1695 snprintf(ci->error_str, sizeof(ci->error_str), 1696 "No matching connections found"); 1697 return; 1698 } 1699 1700 ci->status = CTL_ISCSI_OK; 1701} 1702 1703static void 1704cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1705{ 1706 struct icl_pdu *response; 1707 struct iscsi_bhs_asynchronous_message *bhsam; 1708 struct ctl_iscsi_logout_params *cilp; 1709 struct cfiscsi_session *cs; 1710 struct cfiscsi_softc *softc; 1711 int found = 0; 1712 1713 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1714 softc = &cfiscsi_softc; 1715 1716 mtx_lock(&softc->lock); 1717 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1718 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1719 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1720 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1721 continue; 1722 1723 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1724 if (response == NULL) { 1725 ci->status = CTL_ISCSI_ERROR; 1726 snprintf(ci->error_str, sizeof(ci->error_str), 1727 "Unable to allocate memory"); 1728 mtx_unlock(&softc->lock); 1729 return; 1730 } 1731 bhsam = 1732 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1733 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1734 bhsam->bhsam_flags = 0x80; 1735 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1736 bhsam->bhsam_parameter3 = htons(10); 1737 cfiscsi_pdu_queue(response); 1738 found++; 1739 } 1740 mtx_unlock(&softc->lock); 1741 1742 if (found == 0) { 1743 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1744 snprintf(ci->error_str, sizeof(ci->error_str), 1745 "No matching connections found"); 1746 return; 1747 } 1748 1749 ci->status = CTL_ISCSI_OK; 1750} 1751 1752#ifdef ICL_KERNEL_PROXY 1753static void 1754cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1755{ 1756 struct ctl_iscsi_listen_params *cilp; 1757 struct sockaddr *sa; 1758 int error; 1759 1760 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1761 1762 if (cfiscsi_softc.listener == NULL) { 1763 CFISCSI_DEBUG("no listener"); 1764 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1765 ci->status = CTL_ISCSI_ERROR; 1766 return; 1767 } 1768 1769 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1770 if (error != 0) { 1771 CFISCSI_DEBUG("getsockaddr, error %d", error); 1772 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1773 ci->status = CTL_ISCSI_ERROR; 1774 return; 1775 } 1776 1777 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1778 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1779 if (error != 0) { 1780 free(sa, M_SONAME); 1781 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1782 snprintf(ci->error_str, sizeof(ci->error_str), 1783 "icl_listen_add failed, error %d", error); 1784 ci->status = CTL_ISCSI_ERROR; 1785 return; 1786 } 1787 1788 ci->status = CTL_ISCSI_OK; 1789} 1790 1791static void 1792cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1793{ 1794 struct ctl_iscsi_accept_params *ciap; 1795 struct cfiscsi_session *cs; 1796 int error; 1797 1798 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1799 1800 mtx_lock(&cfiscsi_softc.lock); 1801 for (;;) { 1802 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1803 if (cs->cs_waiting_for_ctld) 1804 break; 1805 } 1806 if (cs != NULL) 1807 break; 1808 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1809 if (error != 0) { 1810 mtx_unlock(&cfiscsi_softc.lock); 1811 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1812 ci->status = CTL_ISCSI_ERROR; 1813 return; 1814 } 1815 } 1816 mtx_unlock(&cfiscsi_softc.lock); 1817 1818 cs->cs_waiting_for_ctld = false; 1819 cs->cs_login_phase = true; 1820 1821 ciap->connection_id = cs->cs_id; 1822 ciap->portal_id = cs->cs_portal_id; 1823 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1824 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1825 cs->cs_initiator_sa->sa_len); 1826 if (error != 0) { 1827 snprintf(ci->error_str, sizeof(ci->error_str), 1828 "copyout failed with error %d", error); 1829 ci->status = CTL_ISCSI_ERROR; 1830 return; 1831 } 1832 1833 ci->status = CTL_ISCSI_OK; 1834} 1835 1836static void 1837cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1838{ 1839 struct ctl_iscsi_send_params *cisp; 1840 struct cfiscsi_session *cs; 1841 struct icl_pdu *ip; 1842 size_t datalen; 1843 void *data; 1844 int error; 1845 1846 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1847 1848 mtx_lock(&cfiscsi_softc.lock); 1849 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1850 if (cs->cs_id == cisp->connection_id) 1851 break; 1852 } 1853 if (cs == NULL) { 1854 mtx_unlock(&cfiscsi_softc.lock); 1855 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1856 ci->status = CTL_ISCSI_ERROR; 1857 return; 1858 } 1859 mtx_unlock(&cfiscsi_softc.lock); 1860 1861#if 0 1862 if (cs->cs_login_phase == false) 1863 return (EBUSY); 1864#endif 1865 1866 if (cs->cs_terminating) { 1867 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1868 ci->status = CTL_ISCSI_ERROR; 1869 return; 1870 } 1871 1872 datalen = cisp->data_segment_len; 1873 /* 1874 * XXX 1875 */ 1876 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1877 if (datalen > 65535) { 1878 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1879 ci->status = CTL_ISCSI_ERROR; 1880 return; 1881 } 1882 if (datalen > 0) { 1883 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1884 error = copyin(cisp->data_segment, data, datalen); 1885 if (error != 0) { 1886 free(data, M_CFISCSI); 1887 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1888 ci->status = CTL_ISCSI_ERROR; 1889 return; 1890 } 1891 } 1892 1893 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1894 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1895 if (datalen > 0) { 1896 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1897 free(data, M_CFISCSI); 1898 } 1899 CFISCSI_SESSION_LOCK(cs); 1900 icl_pdu_queue(ip); 1901 CFISCSI_SESSION_UNLOCK(cs); 1902 ci->status = CTL_ISCSI_OK; 1903} 1904 1905static void 1906cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1907{ 1908 struct ctl_iscsi_receive_params *cirp; 1909 struct cfiscsi_session *cs; 1910 struct icl_pdu *ip; 1911 void *data; 1912 int error; 1913 1914 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1915 1916 mtx_lock(&cfiscsi_softc.lock); 1917 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1918 if (cs->cs_id == cirp->connection_id) 1919 break; 1920 } 1921 if (cs == NULL) { 1922 mtx_unlock(&cfiscsi_softc.lock); 1923 snprintf(ci->error_str, sizeof(ci->error_str), 1924 "connection not found"); 1925 ci->status = CTL_ISCSI_ERROR; 1926 return; 1927 } 1928 mtx_unlock(&cfiscsi_softc.lock); 1929 1930#if 0 1931 if (is->is_login_phase == false) 1932 return (EBUSY); 1933#endif 1934 1935 CFISCSI_SESSION_LOCK(cs); 1936 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1937 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1938 if (error != 0) { 1939 CFISCSI_SESSION_UNLOCK(cs); 1940 snprintf(ci->error_str, sizeof(ci->error_str), 1941 "interrupted by signal"); 1942 ci->status = CTL_ISCSI_ERROR; 1943 return; 1944 } 1945 } 1946 1947 if (cs->cs_terminating) { 1948 CFISCSI_SESSION_UNLOCK(cs); 1949 snprintf(ci->error_str, sizeof(ci->error_str), 1950 "connection terminating"); 1951 ci->status = CTL_ISCSI_ERROR; 1952 return; 1953 } 1954 ip = cs->cs_login_pdu; 1955 cs->cs_login_pdu = NULL; 1956 CFISCSI_SESSION_UNLOCK(cs); 1957 1958 if (ip->ip_data_len > cirp->data_segment_len) { 1959 icl_pdu_free(ip); 1960 snprintf(ci->error_str, sizeof(ci->error_str), 1961 "data segment too big"); 1962 ci->status = CTL_ISCSI_ERROR; 1963 return; 1964 } 1965 1966 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1967 if (ip->ip_data_len > 0) { 1968 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1969 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1970 copyout(data, cirp->data_segment, ip->ip_data_len); 1971 free(data, M_CFISCSI); 1972 } 1973 1974 icl_pdu_free(ip); 1975 ci->status = CTL_ISCSI_OK; 1976} 1977 1978#endif /* !ICL_KERNEL_PROXY */ 1979 1980static void 1981cfiscsi_ioctl_port_create(struct ctl_req *req) 1982{ 1983 struct cfiscsi_target *ct; 1984 struct ctl_port *port; 1985 const char *target, *alias, *tags; 1986 struct scsi_vpd_id_descriptor *desc; 1987 ctl_options_t opts; 1988 int retval, len, idlen; 1989 uint16_t tag; 1990 1991 ctl_init_opts(&opts, req->num_args, req->kern_args); 1992 target = ctl_get_opt(&opts, "cfiscsi_target"); 1993 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1994 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1995 if (target == NULL || tags == NULL) { 1996 req->status = CTL_LUN_ERROR; 1997 snprintf(req->error_str, sizeof(req->error_str), 1998 "Missing required argument"); 1999 ctl_free_opts(&opts); 2000 return; 2001 } 2002 tag = strtol(tags, (char **)NULL, 10); 2003 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2004 if (ct == NULL) { 2005 req->status = CTL_LUN_ERROR; 2006 snprintf(req->error_str, sizeof(req->error_str), 2007 "failed to create target \"%s\"", target); 2008 ctl_free_opts(&opts); 2009 return; 2010 } 2011 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2012 req->status = CTL_LUN_ERROR; 2013 snprintf(req->error_str, sizeof(req->error_str), 2014 "target \"%s\" already exists", target); 2015 cfiscsi_target_release(ct); 2016 ctl_free_opts(&opts); 2017 return; 2018 } 2019 port = &ct->ct_port; 2020 // WAT 2021 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2022 goto done; 2023 2024 port->frontend = &cfiscsi_frontend; 2025 port->port_type = CTL_PORT_ISCSI; 2026 /* XXX KDM what should the real number be here? */ 2027 port->num_requested_ctl_io = 4096; 2028 port->port_name = "iscsi"; 2029 port->physical_port = tag; 2030 port->virtual_port = ct->ct_target_id; 2031 port->port_online = cfiscsi_online; 2032 port->port_offline = cfiscsi_offline; 2033 port->port_info = cfiscsi_info; 2034 port->onoff_arg = ct; 2035 port->lun_enable = cfiscsi_lun_enable; 2036 port->lun_disable = cfiscsi_lun_disable; 2037 port->targ_lun_arg = ct; 2038 port->fe_datamove = cfiscsi_datamove; 2039 port->fe_done = cfiscsi_done; 2040 2041 /* XXX KDM what should we report here? */ 2042 /* XXX These should probably be fetched from CTL. */ 2043 port->max_targets = 1; 2044 port->max_target_id = 15; 2045 2046 port->options = opts; 2047 STAILQ_INIT(&opts); 2048 2049 /* Generate Port ID. */ 2050 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2051 idlen = roundup2(idlen, 4); 2052 len = sizeof(struct scsi_vpd_device_id) + idlen; 2053 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2054 M_CTL, M_WAITOK | M_ZERO); 2055 port->port_devid->len = len; 2056 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2057 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2058 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2059 SVPD_ID_TYPE_SCSI_NAME; 2060 desc->length = idlen; 2061 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2062 2063 /* Generate Target ID. */ 2064 idlen = strlen(target) + 1; 2065 idlen = roundup2(idlen, 4); 2066 len = sizeof(struct scsi_vpd_device_id) + idlen; 2067 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2068 M_CTL, M_WAITOK | M_ZERO); 2069 port->target_devid->len = len; 2070 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2071 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2072 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2073 SVPD_ID_TYPE_SCSI_NAME; 2074 desc->length = idlen; 2075 strlcpy(desc->identifier, target, idlen); 2076 2077 retval = ctl_port_register(port); 2078 if (retval != 0) { 2079 ctl_free_opts(&port->options); 2080 cfiscsi_target_release(ct); 2081 free(port->port_devid, M_CFISCSI); 2082 free(port->target_devid, M_CFISCSI); 2083 req->status = CTL_LUN_ERROR; 2084 snprintf(req->error_str, sizeof(req->error_str), 2085 "ctl_port_register() failed with error %d", retval); 2086 return; 2087 } 2088done: 2089 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2090 req->status = CTL_LUN_OK; 2091 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2092 sizeof(port->targ_port)); //XXX 2093} 2094 2095static void 2096cfiscsi_ioctl_port_remove(struct ctl_req *req) 2097{ 2098 struct cfiscsi_target *ct; 2099 const char *target, *tags; 2100 ctl_options_t opts; 2101 uint16_t tag; 2102 2103 ctl_init_opts(&opts, req->num_args, req->kern_args); 2104 target = ctl_get_opt(&opts, "cfiscsi_target"); 2105 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2106 if (target == NULL || tags == NULL) { 2107 ctl_free_opts(&opts); 2108 req->status = CTL_LUN_ERROR; 2109 snprintf(req->error_str, sizeof(req->error_str), 2110 "Missing required argument"); 2111 return; 2112 } 2113 tag = strtol(tags, (char **)NULL, 10); 2114 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2115 if (ct == NULL) { 2116 ctl_free_opts(&opts); 2117 req->status = CTL_LUN_ERROR; 2118 snprintf(req->error_str, sizeof(req->error_str), 2119 "can't find target \"%s\"", target); 2120 return; 2121 } 2122 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2123 ctl_free_opts(&opts); 2124 req->status = CTL_LUN_ERROR; 2125 snprintf(req->error_str, sizeof(req->error_str), 2126 "target \"%s\" is already dying", target); 2127 return; 2128 } 2129 ctl_free_opts(&opts); 2130 2131 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2132 ctl_port_offline(&ct->ct_port); 2133 cfiscsi_target_release(ct); 2134 cfiscsi_target_release(ct); 2135 req->status = CTL_LUN_OK; 2136} 2137 2138static int 2139cfiscsi_ioctl(struct cdev *dev, 2140 u_long cmd, caddr_t addr, int flag, struct thread *td) 2141{ 2142 struct ctl_iscsi *ci; 2143 struct ctl_req *req; 2144 2145 if (cmd == CTL_PORT_REQ) { 2146 req = (struct ctl_req *)addr; 2147 switch (req->reqtype) { 2148 case CTL_REQ_CREATE: 2149 cfiscsi_ioctl_port_create(req); 2150 break; 2151 case CTL_REQ_REMOVE: 2152 cfiscsi_ioctl_port_remove(req); 2153 break; 2154 default: 2155 req->status = CTL_LUN_ERROR; 2156 snprintf(req->error_str, sizeof(req->error_str), 2157 "Unsupported request type %d", req->reqtype); 2158 } 2159 return (0); 2160 } 2161 2162 if (cmd != CTL_ISCSI) 2163 return (ENOTTY); 2164 2165 ci = (struct ctl_iscsi *)addr; 2166 switch (ci->type) { 2167 case CTL_ISCSI_HANDOFF: 2168 cfiscsi_ioctl_handoff(ci); 2169 break; 2170 case CTL_ISCSI_LIST: 2171 cfiscsi_ioctl_list(ci); 2172 break; 2173 case CTL_ISCSI_TERMINATE: 2174 cfiscsi_ioctl_terminate(ci); 2175 break; 2176 case CTL_ISCSI_LOGOUT: 2177 cfiscsi_ioctl_logout(ci); 2178 break; 2179#ifdef ICL_KERNEL_PROXY 2180 case CTL_ISCSI_LISTEN: 2181 cfiscsi_ioctl_listen(ci); 2182 break; 2183 case CTL_ISCSI_ACCEPT: 2184 cfiscsi_ioctl_accept(ci); 2185 break; 2186 case CTL_ISCSI_SEND: 2187 cfiscsi_ioctl_send(ci); 2188 break; 2189 case CTL_ISCSI_RECEIVE: 2190 cfiscsi_ioctl_receive(ci); 2191 break; 2192#else 2193 case CTL_ISCSI_LISTEN: 2194 case CTL_ISCSI_ACCEPT: 2195 case CTL_ISCSI_SEND: 2196 case CTL_ISCSI_RECEIVE: 2197 ci->status = CTL_ISCSI_ERROR; 2198 snprintf(ci->error_str, sizeof(ci->error_str), 2199 "%s: CTL compiled without ICL_KERNEL_PROXY", 2200 __func__); 2201 break; 2202#endif /* !ICL_KERNEL_PROXY */ 2203 default: 2204 ci->status = CTL_ISCSI_ERROR; 2205 snprintf(ci->error_str, sizeof(ci->error_str), 2206 "%s: invalid iSCSI request type %d", __func__, ci->type); 2207 break; 2208 } 2209 2210 return (0); 2211} 2212 2213static void 2214cfiscsi_target_hold(struct cfiscsi_target *ct) 2215{ 2216 2217 refcount_acquire(&ct->ct_refcount); 2218} 2219 2220static void 2221cfiscsi_target_release(struct cfiscsi_target *ct) 2222{ 2223 struct cfiscsi_softc *softc; 2224 2225 softc = ct->ct_softc; 2226 mtx_lock(&softc->lock); 2227 if (refcount_release(&ct->ct_refcount)) { 2228 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2229 mtx_unlock(&softc->lock); 2230 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2231 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2232 if (ctl_port_deregister(&ct->ct_port) != 0) 2233 printf("%s: ctl_port_deregister() failed\n", 2234 __func__); 2235 } 2236 free(ct, M_CFISCSI); 2237 2238 return; 2239 } 2240 mtx_unlock(&softc->lock); 2241} 2242 2243static struct cfiscsi_target * 2244cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2245{ 2246 struct cfiscsi_target *ct; 2247 2248 mtx_lock(&softc->lock); 2249 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2250 if (ct->ct_tag != tag || 2251 strcmp(name, ct->ct_name) != 0 || 2252 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2253 continue; 2254 cfiscsi_target_hold(ct); 2255 mtx_unlock(&softc->lock); 2256 return (ct); 2257 } 2258 mtx_unlock(&softc->lock); 2259 2260 return (NULL); 2261} 2262 2263static struct cfiscsi_target * 2264cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2265 const char *alias, uint16_t tag) 2266{ 2267 struct cfiscsi_target *ct, *newct; 2268 2269 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2270 return (NULL); 2271 2272 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2273 2274 mtx_lock(&softc->lock); 2275 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2276 if (ct->ct_tag != tag || 2277 strcmp(name, ct->ct_name) != 0 || 2278 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2279 continue; 2280 cfiscsi_target_hold(ct); 2281 mtx_unlock(&softc->lock); 2282 free(newct, M_CFISCSI); 2283 return (ct); 2284 } 2285 2286 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2287 if (alias != NULL) 2288 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2289 newct->ct_tag = tag; 2290 refcount_init(&newct->ct_refcount, 1); 2291 newct->ct_softc = softc; 2292 if (TAILQ_EMPTY(&softc->targets)) 2293 softc->last_target_id = 0; 2294 newct->ct_target_id = ++softc->last_target_id; 2295 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2296 mtx_unlock(&softc->lock); 2297 2298 return (newct); 2299} 2300 2301static int 2302cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2303{ 2304 2305 return (0); 2306} 2307 2308static int 2309cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2310{ 2311 2312 return (0); 2313} 2314 2315static void 2316cfiscsi_datamove_in(union ctl_io *io) 2317{ 2318 struct cfiscsi_session *cs; 2319 struct icl_pdu *request, *response; 2320 const struct iscsi_bhs_scsi_command *bhssc; 2321 struct iscsi_bhs_data_in *bhsdi; 2322 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2323 size_t len, expected_len, sg_len, buffer_offset; 2324 const char *sg_addr; 2325 int ctl_sg_count, error, i; 2326 2327 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2328 cs = PDU_SESSION(request); 2329 2330 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2331 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2332 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2333 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2334 2335 if (io->scsiio.kern_sg_entries > 0) { 2336 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2337 ctl_sg_count = io->scsiio.kern_sg_entries; 2338 } else { 2339 ctl_sglist = &ctl_sg_entry; 2340 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2341 ctl_sglist->len = io->scsiio.kern_data_len; 2342 ctl_sg_count = 1; 2343 } 2344 2345 /* 2346 * This is the total amount of data to be transferred within the current 2347 * SCSI command. We need to record it so that we can properly report 2348 * underflow/underflow. 2349 */ 2350 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2351 2352 /* 2353 * This is the offset within the current SCSI command; for the first 2354 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2355 * it will be the sum of lengths of previous ones. 2356 */ 2357 buffer_offset = io->scsiio.kern_rel_offset; 2358 2359 /* 2360 * This is the transfer length expected by the initiator. In theory, 2361 * it could be different from the correct amount of data from the SCSI 2362 * point of view, even if that doesn't make any sense. 2363 */ 2364 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2365#if 0 2366 if (expected_len != io->scsiio.kern_total_len) { 2367 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2368 "actual length %zd", expected_len, 2369 (size_t)io->scsiio.kern_total_len); 2370 } 2371#endif 2372 2373 if (buffer_offset >= expected_len) { 2374#if 0 2375 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2376 "already sent the expected len", buffer_offset); 2377#endif 2378 io->scsiio.be_move_done(io); 2379 return; 2380 } 2381 2382 i = 0; 2383 sg_addr = NULL; 2384 sg_len = 0; 2385 response = NULL; 2386 bhsdi = NULL; 2387 for (;;) { 2388 if (response == NULL) { 2389 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2390 if (response == NULL) { 2391 CFISCSI_SESSION_WARN(cs, "failed to " 2392 "allocate memory; dropping connection"); 2393 ctl_set_busy(&io->scsiio); 2394 io->scsiio.be_move_done(io); 2395 cfiscsi_session_terminate(cs); 2396 return; 2397 } 2398 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2399 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2400 bhsdi->bhsdi_initiator_task_tag = 2401 bhssc->bhssc_initiator_task_tag; 2402 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2403 PDU_EXPDATASN(request)++; 2404 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2405 } 2406 2407 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2408 if (sg_len == 0) { 2409 sg_addr = ctl_sglist[i].addr; 2410 sg_len = ctl_sglist[i].len; 2411 KASSERT(sg_len > 0, ("sg_len <= 0")); 2412 } 2413 2414 len = sg_len; 2415 2416 /* 2417 * Truncate to maximum data segment length. 2418 */ 2419 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2420 ("ip_data_len %zd >= max_data_segment_length %zd", 2421 response->ip_data_len, cs->cs_max_data_segment_length)); 2422 if (response->ip_data_len + len > 2423 cs->cs_max_data_segment_length) { 2424 len = cs->cs_max_data_segment_length - 2425 response->ip_data_len; 2426 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2427 len, sg_len)); 2428 } 2429 2430 /* 2431 * Truncate to expected data transfer length. 2432 */ 2433 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2434 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2435 buffer_offset, response->ip_data_len, expected_len)); 2436 if (buffer_offset + response->ip_data_len + len > expected_len) { 2437 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2438 "to expected data transfer length %zd", 2439 buffer_offset + response->ip_data_len + len, expected_len); 2440 len = expected_len - (buffer_offset + response->ip_data_len); 2441 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2442 len, sg_len)); 2443 } 2444 2445 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2446 if (error != 0) { 2447 CFISCSI_SESSION_WARN(cs, "failed to " 2448 "allocate memory; dropping connection"); 2449 icl_pdu_free(response); 2450 ctl_set_busy(&io->scsiio); 2451 io->scsiio.be_move_done(io); 2452 cfiscsi_session_terminate(cs); 2453 return; 2454 } 2455 sg_addr += len; 2456 sg_len -= len; 2457 2458 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2459 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2460 buffer_offset, response->ip_data_len, expected_len)); 2461 if (buffer_offset + response->ip_data_len == expected_len) { 2462 /* 2463 * Already have the amount of data the initiator wanted. 2464 */ 2465 break; 2466 } 2467 2468 if (sg_len == 0) { 2469 /* 2470 * End of scatter-gather segment; 2471 * proceed to the next one... 2472 */ 2473 if (i == ctl_sg_count - 1) { 2474 /* 2475 * ... unless this was the last one. 2476 */ 2477 break; 2478 } 2479 i++; 2480 } 2481 2482 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2483 /* 2484 * Can't stuff more data into the current PDU; 2485 * queue it. Note that's not enough to check 2486 * for kern_data_resid == 0 instead; there 2487 * may be several Data-In PDUs for the final 2488 * call to cfiscsi_datamove(), and we want 2489 * to set the F flag only on the last of them. 2490 */ 2491 buffer_offset += response->ip_data_len; 2492 if (buffer_offset == io->scsiio.kern_total_len || 2493 buffer_offset == expected_len) { 2494 buffer_offset -= response->ip_data_len; 2495 break; 2496 } 2497 cfiscsi_pdu_queue(response); 2498 response = NULL; 2499 bhsdi = NULL; 2500 } 2501 } 2502 if (response != NULL) { 2503 buffer_offset += response->ip_data_len; 2504 if (buffer_offset == io->scsiio.kern_total_len || 2505 buffer_offset == expected_len) { 2506 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2507 if (io->io_hdr.status == CTL_SUCCESS) { 2508 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2509 if (PDU_TOTAL_TRANSFER_LEN(request) < 2510 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2511 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2512 bhsdi->bhsdi_residual_count = 2513 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2514 PDU_TOTAL_TRANSFER_LEN(request)); 2515 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2516 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2517 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2518 bhsdi->bhsdi_residual_count = 2519 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2520 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2521 } 2522 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2523 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2524 } 2525 } 2526 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2527 cfiscsi_pdu_queue(response); 2528 } 2529 2530 io->scsiio.be_move_done(io); 2531} 2532 2533static void 2534cfiscsi_datamove_out(union ctl_io *io) 2535{ 2536 struct cfiscsi_session *cs; 2537 struct icl_pdu *request, *response; 2538 const struct iscsi_bhs_scsi_command *bhssc; 2539 struct iscsi_bhs_r2t *bhsr2t; 2540 struct cfiscsi_data_wait *cdw; 2541 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2542 uint32_t expected_len, r2t_off, r2t_len; 2543 uint32_t target_transfer_tag; 2544 bool done; 2545 2546 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2547 cs = PDU_SESSION(request); 2548 2549 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2550 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2551 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2552 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2553 2554 /* 2555 * We need to record it so that we can properly report 2556 * underflow/underflow. 2557 */ 2558 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2559 2560 /* 2561 * Report write underflow as error since CTL and backends don't 2562 * really support it, and SCSI does not tell how to do it right. 2563 */ 2564 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2565 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2566 expected_len) { 2567 io->scsiio.io_hdr.port_status = 43; 2568 io->scsiio.be_move_done(io); 2569 return; 2570 } 2571 2572 target_transfer_tag = 2573 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2574 2575#if 0 2576 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2577 "task tag 0x%x, target transfer tag 0x%x", 2578 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2579#endif 2580 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2581 if (cdw == NULL) { 2582 CFISCSI_SESSION_WARN(cs, "failed to " 2583 "allocate memory; dropping connection"); 2584 ctl_set_busy(&io->scsiio); 2585 io->scsiio.be_move_done(io); 2586 cfiscsi_session_terminate(cs); 2587 return; 2588 } 2589 cdw->cdw_ctl_io = io; 2590 cdw->cdw_target_transfer_tag = target_transfer_tag; 2591 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2592 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2593 cdw->cdw_datasn = 0; 2594 2595 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2596 if (io->scsiio.kern_sg_entries > 0) { 2597 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2598 } else { 2599 ctl_sglist = &ctl_sg_entry; 2600 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2601 ctl_sglist->len = io->scsiio.kern_data_len; 2602 } 2603 cdw->cdw_sg_index = 0; 2604 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2605 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2606 r2t_off = io->scsiio.ext_data_filled; 2607 while (r2t_off > 0) { 2608 if (r2t_off >= cdw->cdw_sg_len) { 2609 r2t_off -= cdw->cdw_sg_len; 2610 cdw->cdw_sg_index++; 2611 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2612 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2613 continue; 2614 } 2615 cdw->cdw_sg_addr += r2t_off; 2616 cdw->cdw_sg_len -= r2t_off; 2617 r2t_off = 0; 2618 } 2619 2620 if (cs->cs_immediate_data && 2621 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2622 icl_pdu_data_segment_length(request)) { 2623 done = cfiscsi_handle_data_segment(request, cdw); 2624 if (done) { 2625 uma_zfree(cfiscsi_data_wait_zone, cdw); 2626 io->scsiio.be_move_done(io); 2627 return; 2628 } 2629 } 2630 2631 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2632 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2633 cs->cs_max_burst_length); 2634 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2635 2636 CFISCSI_SESSION_LOCK(cs); 2637 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2638 CFISCSI_SESSION_UNLOCK(cs); 2639 2640 /* 2641 * XXX: We should limit the number of outstanding R2T PDUs 2642 * per task to MaxOutstandingR2T. 2643 */ 2644 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2645 if (response == NULL) { 2646 CFISCSI_SESSION_WARN(cs, "failed to " 2647 "allocate memory; dropping connection"); 2648 ctl_set_busy(&io->scsiio); 2649 io->scsiio.be_move_done(io); 2650 cfiscsi_session_terminate(cs); 2651 return; 2652 } 2653 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2654 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2655 bhsr2t->bhsr2t_flags = 0x80; 2656 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2657 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2658 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2659 /* 2660 * XXX: Here we assume that cfiscsi_datamove() won't ever 2661 * be running concurrently on several CPUs for a given 2662 * command. 2663 */ 2664 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2665 PDU_R2TSN(request)++; 2666 /* 2667 * This is the offset within the current SCSI command; 2668 * i.e. for the first call of datamove(), it will be 0, 2669 * and for subsequent ones it will be the sum of lengths 2670 * of previous ones. 2671 * 2672 * The ext_data_filled is to account for unsolicited 2673 * (immediate) data that might have already arrived. 2674 */ 2675 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2676 /* 2677 * This is the total length (sum of S/G lengths) this call 2678 * to cfiscsi_datamove() is supposed to handle, limited by 2679 * MaxBurstLength. 2680 */ 2681 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2682 cfiscsi_pdu_queue(response); 2683} 2684 2685static void 2686cfiscsi_datamove(union ctl_io *io) 2687{ 2688 2689 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2690 cfiscsi_datamove_in(io); 2691 else { 2692 /* We hadn't received anything during this datamove yet. */ 2693 io->scsiio.ext_data_filled = 0; 2694 cfiscsi_datamove_out(io); 2695 } 2696} 2697 2698static void 2699cfiscsi_scsi_command_done(union ctl_io *io) 2700{ 2701 struct icl_pdu *request, *response; 2702 struct iscsi_bhs_scsi_command *bhssc; 2703 struct iscsi_bhs_scsi_response *bhssr; 2704#ifdef DIAGNOSTIC 2705 struct cfiscsi_data_wait *cdw; 2706#endif 2707 struct cfiscsi_session *cs; 2708 uint16_t sense_length; 2709 2710 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2711 cs = PDU_SESSION(request); 2712 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2713 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2714 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2715 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2716 2717 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2718 // bhssc->bhssc_initiator_task_tag); 2719 2720#ifdef DIAGNOSTIC 2721 CFISCSI_SESSION_LOCK(cs); 2722 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2723 KASSERT(bhssc->bhssc_initiator_task_tag != 2724 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2725 CFISCSI_SESSION_UNLOCK(cs); 2726#endif 2727 2728 /* 2729 * Do not return status for aborted commands. 2730 * There are exceptions, but none supported by CTL yet. 2731 */ 2732 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2733 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2734 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2735 ctl_free_io(io); 2736 icl_pdu_free(request); 2737 return; 2738 } 2739 2740 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2741 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2742 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2743 bhssr->bhssr_flags = 0x80; 2744 /* 2745 * XXX: We don't deal with bidirectional under/overflows; 2746 * does anything actually support those? 2747 */ 2748 if (PDU_TOTAL_TRANSFER_LEN(request) < 2749 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2750 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2751 bhssr->bhssr_residual_count = 2752 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2753 PDU_TOTAL_TRANSFER_LEN(request)); 2754 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2755 // ntohl(bhssr->bhssr_residual_count)); 2756 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2757 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2758 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2759 bhssr->bhssr_residual_count = 2760 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2761 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2762 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2763 // ntohl(bhssr->bhssr_residual_count)); 2764 } 2765 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2766 bhssr->bhssr_status = io->scsiio.scsi_status; 2767 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2768 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2769 2770 if (io->scsiio.sense_len > 0) { 2771#if 0 2772 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2773 io->scsiio.sense_len); 2774#endif 2775 sense_length = htons(io->scsiio.sense_len); 2776 icl_pdu_append_data(response, 2777 &sense_length, sizeof(sense_length), M_WAITOK); 2778 icl_pdu_append_data(response, 2779 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2780 } 2781 2782 ctl_free_io(io); 2783 icl_pdu_free(request); 2784 cfiscsi_pdu_queue(response); 2785} 2786 2787static void 2788cfiscsi_task_management_done(union ctl_io *io) 2789{ 2790 struct icl_pdu *request, *response; 2791 struct iscsi_bhs_task_management_request *bhstmr; 2792 struct iscsi_bhs_task_management_response *bhstmr2; 2793 struct cfiscsi_data_wait *cdw, *tmpcdw; 2794 struct cfiscsi_session *cs; 2795 2796 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2797 cs = PDU_SESSION(request); 2798 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2799 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2800 ISCSI_BHS_OPCODE_TASK_REQUEST, 2801 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2802 2803#if 0 2804 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2805 bhstmr->bhstmr_initiator_task_tag, 2806 bhstmr->bhstmr_referenced_task_tag); 2807#endif 2808 2809 if ((bhstmr->bhstmr_function & ~0x80) == 2810 BHSTMR_FUNCTION_ABORT_TASK) { 2811 /* 2812 * Make sure we no longer wait for Data-Out for this command. 2813 */ 2814 CFISCSI_SESSION_LOCK(cs); 2815 TAILQ_FOREACH_SAFE(cdw, 2816 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2817 if (bhstmr->bhstmr_referenced_task_tag != 2818 cdw->cdw_initiator_task_tag) 2819 continue; 2820 2821#if 0 2822 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2823 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2824#endif 2825 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2826 cdw, cdw_next); 2827 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2828 uma_zfree(cfiscsi_data_wait_zone, cdw); 2829 } 2830 CFISCSI_SESSION_UNLOCK(cs); 2831 } 2832 2833 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2834 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2835 response->ip_bhs; 2836 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2837 bhstmr2->bhstmr_flags = 0x80; 2838 if (io->io_hdr.status == CTL_SUCCESS) { 2839 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2840 } else { 2841 /* 2842 * XXX: How to figure out what exactly went wrong? iSCSI spec 2843 * expects us to provide detailed error, e.g. "Task does 2844 * not exist" or "LUN does not exist". 2845 */ 2846 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2847 bhstmr2->bhstmr_response = 2848 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2849 } 2850 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2851 2852 ctl_free_io(io); 2853 icl_pdu_free(request); 2854 cfiscsi_pdu_queue(response); 2855} 2856 2857static void 2858cfiscsi_done(union ctl_io *io) 2859{ 2860 struct icl_pdu *request; 2861 struct cfiscsi_session *cs; 2862 2863 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2864 ("invalid CTL status %#x", io->io_hdr.status)); 2865 2866 if (io->io_hdr.io_type == CTL_IO_TASK && 2867 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2868 /* 2869 * Implicit task termination has just completed; nothing to do. 2870 */ 2871 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2872 cs->cs_tasks_aborted = true; 2873 refcount_release(&cs->cs_outstanding_ctl_pdus); 2874 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2875 ctl_free_io(io); 2876 return; 2877 } 2878 2879 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2880 cs = PDU_SESSION(request); 2881 refcount_release(&cs->cs_outstanding_ctl_pdus); 2882 2883 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2884 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2885 cfiscsi_scsi_command_done(io); 2886 break; 2887 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2888 cfiscsi_task_management_done(io); 2889 break; 2890 default: 2891 panic("cfiscsi_done called with wrong opcode 0x%x", 2892 request->ip_bhs->bhs_opcode); 2893 } 2894} 2895