ctl_frontend_iscsi.c revision 275494
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: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 275494 2014-12-05 07:24:17Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 275494 2014-12-05 07:24:17Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capability.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include <dev/iscsi/icl.h> 71#include <dev/iscsi/iscsi_proto.h> 72#include <cam/ctl/ctl_frontend_iscsi.h> 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 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; 88TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95static int login_timeout = 60; 96TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99static int maxcmdsn_delta = 256; 100TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105#define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113#define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130#define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145#define PDU_EXPDATASN(X) (X)->ip_prv0 146#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147#define PDU_R2TSN(X) (X)->ip_prv2 148 149int cfiscsi_init(void); 150static void cfiscsi_online(void *arg); 151static void cfiscsi_offline(void *arg); 152static int cfiscsi_info(void *arg, struct sbuf *sb); 153static int cfiscsi_lun_enable(void *arg, 154 struct ctl_id target_id, int lun_id); 155static int cfiscsi_lun_disable(void *arg, 156 struct ctl_id target_id, int lun_id); 157static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 158static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160static void cfiscsi_datamove(union ctl_io *io); 161static void cfiscsi_datamove_in(union ctl_io *io); 162static void cfiscsi_datamove_out(union ctl_io *io); 163static void cfiscsi_done(union ctl_io *io); 164static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 165static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 168static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 169static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 170static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 171static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 172 *softc, const char *name); 173static struct cfiscsi_target *cfiscsi_target_find_or_create( 174 struct cfiscsi_softc *softc, const char *name, const char *alias); 175static void cfiscsi_target_release(struct cfiscsi_target *ct); 176static void cfiscsi_session_delete(struct cfiscsi_session *cs); 177 178static struct cfiscsi_softc cfiscsi_softc; 179extern struct ctl_softc *control_softc; 180 181static struct ctl_frontend cfiscsi_frontend = 182{ 183 .name = "iscsi", 184 .init = cfiscsi_init, 185 .ioctl = cfiscsi_ioctl, 186}; 187CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 188MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 189 190static struct icl_pdu * 191cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 192{ 193 194 return (icl_pdu_new_bhs(request->ip_conn, flags)); 195} 196 197static bool 198cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 199{ 200 const struct iscsi_bhs_scsi_command *bhssc; 201 struct cfiscsi_session *cs; 202 uint32_t cmdsn, expstatsn; 203 204 cs = PDU_SESSION(request); 205 206 /* 207 * Every incoming PDU - not just NOP-Out - resets the ping timer. 208 * The purpose of the timeout is to reset the connection when it stalls; 209 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 210 * in some queue. 211 * 212 * XXX: Locking? 213 */ 214 cs->cs_timeout = 0; 215 216 /* 217 * Data-Out PDUs don't contain CmdSN. 218 */ 219 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 220 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 221 return (false); 222 223 /* 224 * We're only using fields common for all the request 225 * (initiator -> target) PDUs. 226 */ 227 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 228 cmdsn = ntohl(bhssc->bhssc_cmdsn); 229 expstatsn = ntohl(bhssc->bhssc_expstatsn); 230 231 CFISCSI_SESSION_LOCK(cs); 232#if 0 233 if (expstatsn != cs->cs_statsn) { 234 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 235 "while current StatSN is %d", expstatsn, 236 cs->cs_statsn); 237 } 238#endif 239 240 /* 241 * The target MUST silently ignore any non-immediate command outside 242 * of this range. 243 */ 244 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 245 CFISCSI_SESSION_UNLOCK(cs); 246 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 247 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 248 return (true); 249 } 250 251 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 252 cs->cs_cmdsn++; 253 254 CFISCSI_SESSION_UNLOCK(cs); 255 256 return (false); 257} 258 259static void 260cfiscsi_pdu_handle(struct icl_pdu *request) 261{ 262 struct cfiscsi_session *cs; 263 bool ignore; 264 265 cs = PDU_SESSION(request); 266 267 ignore = cfiscsi_pdu_update_cmdsn(request); 268 if (ignore) { 269 icl_pdu_free(request); 270 return; 271 } 272 273 /* 274 * Handle the PDU; this includes e.g. receiving the remaining 275 * part of PDU and submitting the SCSI command to CTL 276 * or queueing a reply. The handling routine is responsible 277 * for freeing the PDU when it's no longer needed. 278 */ 279 switch (request->ip_bhs->bhs_opcode & 280 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 281 case ISCSI_BHS_OPCODE_NOP_OUT: 282 cfiscsi_pdu_handle_nop_out(request); 283 break; 284 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 285 cfiscsi_pdu_handle_scsi_command(request); 286 break; 287 case ISCSI_BHS_OPCODE_TASK_REQUEST: 288 cfiscsi_pdu_handle_task_request(request); 289 break; 290 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 291 cfiscsi_pdu_handle_data_out(request); 292 break; 293 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 294 cfiscsi_pdu_handle_logout_request(request); 295 break; 296 default: 297 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 298 "opcode 0x%x; dropping connection", 299 request->ip_bhs->bhs_opcode); 300 icl_pdu_free(request); 301 cfiscsi_session_terminate(cs); 302 } 303 304} 305 306static void 307cfiscsi_receive_callback(struct icl_pdu *request) 308{ 309 struct cfiscsi_session *cs; 310 311 cs = PDU_SESSION(request); 312 313#ifdef ICL_KERNEL_PROXY 314 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 315 if (cs->cs_login_pdu == NULL) 316 cs->cs_login_pdu = request; 317 else 318 icl_pdu_free(request); 319 cv_signal(&cs->cs_login_cv); 320 return; 321 } 322#endif 323 324 cfiscsi_pdu_handle(request); 325} 326 327static void 328cfiscsi_error_callback(struct icl_conn *ic) 329{ 330 struct cfiscsi_session *cs; 331 332 cs = CONN_SESSION(ic); 333 334 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 335 cfiscsi_session_terminate(cs); 336} 337 338static int 339cfiscsi_pdu_prepare(struct icl_pdu *response) 340{ 341 struct cfiscsi_session *cs; 342 struct iscsi_bhs_scsi_response *bhssr; 343 bool advance_statsn = true; 344 345 cs = PDU_SESSION(response); 346 347 CFISCSI_SESSION_LOCK_ASSERT(cs); 348 349 /* 350 * We're only using fields common for all the response 351 * (target -> initiator) PDUs. 352 */ 353 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 354 355 /* 356 * 10.8.3: "The StatSN for this connection is not advanced 357 * after this PDU is sent." 358 */ 359 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 360 advance_statsn = false; 361 362 /* 363 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 364 * StatSN for the connection is not advanced after this PDU is sent." 365 */ 366 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 367 bhssr->bhssr_initiator_task_tag == 0xffffffff) 368 advance_statsn = false; 369 370 /* 371 * See the comment below - StatSN is not meaningful and must 372 * not be advanced. 373 */ 374 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 375 advance_statsn = false; 376 377 /* 378 * 10.7.3: "The fields StatSN, Status, and Residual Count 379 * only have meaningful content if the S bit is set to 1." 380 */ 381 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 382 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 383 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 384 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 385 386 if (advance_statsn) 387 cs->cs_statsn++; 388 389 return (0); 390} 391 392static void 393cfiscsi_pdu_queue(struct icl_pdu *response) 394{ 395 struct cfiscsi_session *cs; 396 397 cs = PDU_SESSION(response); 398 399 CFISCSI_SESSION_LOCK(cs); 400 cfiscsi_pdu_prepare(response); 401 icl_pdu_queue(response); 402 CFISCSI_SESSION_UNLOCK(cs); 403} 404 405static uint32_t 406cfiscsi_decode_lun(uint64_t encoded) 407{ 408 uint8_t lun[8]; 409 uint32_t result; 410 411 /* 412 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 413 * but is in fact an evil, multidimensional structure defined 414 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 415 */ 416 memcpy(lun, &encoded, sizeof(lun)); 417 switch (lun[0] & 0xC0) { 418 case 0x00: 419 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 420 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 421 CFISCSI_WARN("malformed LUN " 422 "(peripheral device addressing method): 0x%jx", 423 (uintmax_t)encoded); 424 result = 0xffffffff; 425 break; 426 } 427 result = lun[1]; 428 break; 429 case 0x40: 430 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 431 lun[6] != 0 || lun[7] != 0) { 432 CFISCSI_WARN("malformed LUN " 433 "(flat address space addressing method): 0x%jx", 434 (uintmax_t)encoded); 435 result = 0xffffffff; 436 break; 437 } 438 result = ((lun[0] & 0x3f) << 8) + lun[1]; 439 break; 440 case 0xC0: 441 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 442 lun[6] != 0 || lun[7] != 0) { 443 CFISCSI_WARN("malformed LUN (extended flat " 444 "address space addressing method): 0x%jx", 445 (uintmax_t)encoded); 446 result = 0xffffffff; 447 break; 448 } 449 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 450 default: 451 CFISCSI_WARN("unsupported LUN format 0x%jx", 452 (uintmax_t)encoded); 453 result = 0xffffffff; 454 break; 455 } 456 457 return (result); 458} 459 460static void 461cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 462{ 463 struct cfiscsi_session *cs; 464 struct iscsi_bhs_nop_out *bhsno; 465 struct iscsi_bhs_nop_in *bhsni; 466 struct icl_pdu *response; 467 void *data = NULL; 468 size_t datasize; 469 int error; 470 471 cs = PDU_SESSION(request); 472 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 473 474 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 475 /* 476 * Nothing to do, iscsi_pdu_update_statsn() already 477 * zeroed the timeout. 478 */ 479 icl_pdu_free(request); 480 return; 481 } 482 483 datasize = icl_pdu_data_segment_length(request); 484 if (datasize > 0) { 485 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 486 if (data == NULL) { 487 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 488 "dropping connection"); 489 icl_pdu_free(request); 490 cfiscsi_session_terminate(cs); 491 return; 492 } 493 icl_pdu_get_data(request, 0, data, datasize); 494 } 495 496 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 497 if (response == NULL) { 498 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 499 "droppping connection"); 500 free(data, M_CFISCSI); 501 icl_pdu_free(request); 502 cfiscsi_session_terminate(cs); 503 return; 504 } 505 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 506 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 507 bhsni->bhsni_flags = 0x80; 508 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 509 bhsni->bhsni_target_transfer_tag = 0xffffffff; 510 if (datasize > 0) { 511 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 512 if (error != 0) { 513 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 514 "dropping connection"); 515 free(data, M_CFISCSI); 516 icl_pdu_free(request); 517 icl_pdu_free(response); 518 cfiscsi_session_terminate(cs); 519 return; 520 } 521 free(data, M_CFISCSI); 522 } 523 524 icl_pdu_free(request); 525 cfiscsi_pdu_queue(response); 526} 527 528static void 529cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 530{ 531 struct iscsi_bhs_scsi_command *bhssc; 532 struct cfiscsi_session *cs; 533 union ctl_io *io; 534 int error; 535 536 cs = PDU_SESSION(request); 537 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 538 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 539 // bhssc->bhssc_initiator_task_tag); 540 541 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 542 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 543 "ImmediateData=No; dropping connection"); 544 icl_pdu_free(request); 545 cfiscsi_session_terminate(cs); 546 return; 547 } 548 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 549 if (io == NULL) { 550 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 551 "dropping connection"); 552 icl_pdu_free(request); 553 cfiscsi_session_terminate(cs); 554 return; 555 } 556 ctl_zero_io(io); 557 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 558 io->io_hdr.io_type = CTL_IO_SCSI; 559 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 560 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 561 io->io_hdr.nexus.targ_target.id = 0; 562 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 563 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 564 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 565 case BHSSC_FLAGS_ATTR_UNTAGGED: 566 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 567 break; 568 case BHSSC_FLAGS_ATTR_SIMPLE: 569 io->scsiio.tag_type = CTL_TAG_SIMPLE; 570 break; 571 case BHSSC_FLAGS_ATTR_ORDERED: 572 io->scsiio.tag_type = CTL_TAG_ORDERED; 573 break; 574 case BHSSC_FLAGS_ATTR_HOQ: 575 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 576 break; 577 case BHSSC_FLAGS_ATTR_ACA: 578 io->scsiio.tag_type = CTL_TAG_ACA; 579 break; 580 default: 581 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 582 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 583 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 584 break; 585 } 586 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 587 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 588 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 589 error = ctl_queue(io); 590 if (error != CTL_RETVAL_COMPLETE) { 591 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 592 "dropping connection", error); 593 ctl_free_io(io); 594 refcount_release(&cs->cs_outstanding_ctl_pdus); 595 icl_pdu_free(request); 596 cfiscsi_session_terminate(cs); 597 } 598} 599 600static void 601cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 602{ 603 struct iscsi_bhs_task_management_request *bhstmr; 604 struct iscsi_bhs_task_management_response *bhstmr2; 605 struct icl_pdu *response; 606 struct cfiscsi_session *cs; 607 union ctl_io *io; 608 int error; 609 610 cs = PDU_SESSION(request); 611 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 612 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 613 if (io == NULL) { 614 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 615 "dropping connection"); 616 icl_pdu_free(request); 617 cfiscsi_session_terminate(cs); 618 return; 619 } 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 io = cdw->cdw_ctl_io; 912 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 913 ("CTL_FLAG_DATA_IN")); 914 915 done = cfiscsi_handle_data_segment(request, cdw); 916 if (done) { 917 CFISCSI_SESSION_LOCK(cs); 918 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 919 CFISCSI_SESSION_UNLOCK(cs); 920 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 921 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 922 uma_zfree(cfiscsi_data_wait_zone, cdw); 923 if (done) 924 io->scsiio.be_move_done(io); 925 else 926 cfiscsi_datamove_out(io); 927 } 928 929 icl_pdu_free(request); 930} 931 932static void 933cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 934{ 935 struct iscsi_bhs_logout_request *bhslr; 936 struct iscsi_bhs_logout_response *bhslr2; 937 struct icl_pdu *response; 938 struct cfiscsi_session *cs; 939 940 cs = PDU_SESSION(request); 941 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 942 switch (bhslr->bhslr_reason & 0x7f) { 943 case BHSLR_REASON_CLOSE_SESSION: 944 case BHSLR_REASON_CLOSE_CONNECTION: 945 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 946 if (response == NULL) { 947 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 948 icl_pdu_free(request); 949 cfiscsi_session_terminate(cs); 950 return; 951 } 952 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 953 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 954 bhslr2->bhslr_flags = 0x80; 955 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 956 bhslr2->bhslr_initiator_task_tag = 957 bhslr->bhslr_initiator_task_tag; 958 icl_pdu_free(request); 959 cfiscsi_pdu_queue(response); 960 cfiscsi_session_terminate(cs); 961 break; 962 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 963 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 964 if (response == NULL) { 965 CFISCSI_SESSION_WARN(cs, 966 "failed to allocate memory; dropping connection"); 967 icl_pdu_free(request); 968 cfiscsi_session_terminate(cs); 969 return; 970 } 971 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 972 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 973 bhslr2->bhslr_flags = 0x80; 974 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 975 bhslr2->bhslr_initiator_task_tag = 976 bhslr->bhslr_initiator_task_tag; 977 icl_pdu_free(request); 978 cfiscsi_pdu_queue(response); 979 break; 980 default: 981 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 982 bhslr->bhslr_reason); 983 icl_pdu_free(request); 984 cfiscsi_session_terminate(cs); 985 break; 986 } 987} 988 989static void 990cfiscsi_callout(void *context) 991{ 992 struct icl_pdu *cp; 993 struct iscsi_bhs_nop_in *bhsni; 994 struct cfiscsi_session *cs; 995 996 cs = context; 997 998 if (cs->cs_terminating) 999 return; 1000 1001 callout_schedule(&cs->cs_callout, 1 * hz); 1002 1003 atomic_add_int(&cs->cs_timeout, 1); 1004 1005#ifdef ICL_KERNEL_PROXY 1006 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1007 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1008 CFISCSI_SESSION_WARN(cs, "login timed out after " 1009 "%d seconds; dropping connection", cs->cs_timeout); 1010 cfiscsi_session_terminate(cs); 1011 } 1012 return; 1013 } 1014#endif 1015 1016 if (ping_timeout <= 0) { 1017 /* 1018 * Pings are disabled. Don't send NOP-In in this case; 1019 * user might have disabled pings to work around problems 1020 * with certain initiators that can't properly handle 1021 * NOP-In, such as iPXE. Reset the timeout, to avoid 1022 * triggering reconnection, should the user decide to 1023 * reenable them. 1024 */ 1025 cs->cs_timeout = 0; 1026 return; 1027 } 1028 1029 if (cs->cs_timeout >= ping_timeout) { 1030 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1031 "dropping connection", ping_timeout); 1032 cfiscsi_session_terminate(cs); 1033 return; 1034 } 1035 1036 /* 1037 * If the ping was reset less than one second ago - which means 1038 * that we've received some PDU during the last second - assume 1039 * the traffic flows correctly and don't bother sending a NOP-Out. 1040 * 1041 * (It's 2 - one for one second, and one for incrementing is_timeout 1042 * earlier in this routine.) 1043 */ 1044 if (cs->cs_timeout < 2) 1045 return; 1046 1047 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1048 if (cp == NULL) { 1049 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1050 return; 1051 } 1052 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1053 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1054 bhsni->bhsni_flags = 0x80; 1055 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1056 1057 cfiscsi_pdu_queue(cp); 1058} 1059 1060static void 1061cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1062{ 1063 struct cfiscsi_data_wait *cdw; 1064 union ctl_io *io; 1065 int error, last, wait; 1066 1067 if (cs->cs_target == NULL) 1068 return; /* No target yet, so nothing to do. */ 1069 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1070 if (io == NULL) { 1071 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1072 return; 1073 } 1074 ctl_zero_io(io); 1075 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1076 io->io_hdr.io_type = CTL_IO_TASK; 1077 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1078 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1079 io->io_hdr.nexus.targ_target.id = 0; 1080 io->io_hdr.nexus.targ_lun = 0; 1081 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1082 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1083 wait = cs->cs_outstanding_ctl_pdus; 1084 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1085 error = ctl_queue(io); 1086 if (error != CTL_RETVAL_COMPLETE) { 1087 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1088 refcount_release(&cs->cs_outstanding_ctl_pdus); 1089 ctl_free_io(io); 1090 } 1091 1092 CFISCSI_SESSION_LOCK(cs); 1093 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1094 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1095 CFISCSI_SESSION_UNLOCK(cs); 1096 /* 1097 * Set nonzero port status; this prevents backends from 1098 * assuming that the data transfer actually succeeded 1099 * and writing uninitialized data to disk. 1100 */ 1101 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1102 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1103 uma_zfree(cfiscsi_data_wait_zone, cdw); 1104 CFISCSI_SESSION_LOCK(cs); 1105 } 1106 CFISCSI_SESSION_UNLOCK(cs); 1107 1108 /* 1109 * Wait for CTL to terminate all the tasks. 1110 */ 1111 if (wait > 0) 1112 CFISCSI_SESSION_WARN(cs, 1113 "waiting for CTL to terminate %d tasks", wait); 1114 for (;;) { 1115 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1116 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1117 if (last != 0) 1118 break; 1119 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1120 0, "cfiscsi_terminate", hz / 100); 1121 } 1122 if (wait > 0) 1123 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1124} 1125 1126static void 1127cfiscsi_maintenance_thread(void *arg) 1128{ 1129 struct cfiscsi_session *cs; 1130 1131 cs = arg; 1132 1133 for (;;) { 1134 CFISCSI_SESSION_LOCK(cs); 1135 if (cs->cs_terminating == false) 1136 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1137 CFISCSI_SESSION_UNLOCK(cs); 1138 1139 if (cs->cs_terminating) { 1140 1141 /* 1142 * We used to wait up to 30 seconds to deliver queued 1143 * PDUs to the initiator. We also tried hard to deliver 1144 * SCSI Responses for the aborted PDUs. We don't do 1145 * that anymore. We might need to revisit that. 1146 */ 1147 callout_drain(&cs->cs_callout); 1148 icl_conn_close(cs->cs_conn); 1149 1150 /* 1151 * At this point ICL receive thread is no longer 1152 * running; no new tasks can be queued. 1153 */ 1154 cfiscsi_session_terminate_tasks(cs); 1155 cfiscsi_session_delete(cs); 1156 kthread_exit(); 1157 return; 1158 } 1159 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1160 } 1161} 1162 1163static void 1164cfiscsi_session_terminate(struct cfiscsi_session *cs) 1165{ 1166 1167 if (cs->cs_terminating) 1168 return; 1169 cs->cs_terminating = true; 1170 cv_signal(&cs->cs_maintenance_cv); 1171#ifdef ICL_KERNEL_PROXY 1172 cv_signal(&cs->cs_login_cv); 1173#endif 1174} 1175 1176static int 1177cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1178{ 1179 struct cfiscsi_target *ct; 1180 char *name; 1181 int i; 1182 1183 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1184 1185 ct = cs->cs_target; 1186 name = strdup(cs->cs_initiator_id, M_CTL); 1187 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1188 if (i < 0) { 1189 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1190 i); 1191 cs->cs_ctl_initid = -1; 1192 return (1); 1193 } 1194 cs->cs_ctl_initid = i; 1195#if 0 1196 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1197#endif 1198 1199 return (0); 1200} 1201 1202static void 1203cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1204{ 1205 int error; 1206 1207 if (cs->cs_ctl_initid == -1) 1208 return; 1209 1210 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1211 if (error != 0) { 1212 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1213 error); 1214 } 1215 cs->cs_ctl_initid = -1; 1216} 1217 1218static struct cfiscsi_session * 1219cfiscsi_session_new(struct cfiscsi_softc *softc) 1220{ 1221 struct cfiscsi_session *cs; 1222 int error; 1223 1224 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1225 if (cs == NULL) { 1226 CFISCSI_WARN("malloc failed"); 1227 return (NULL); 1228 } 1229 cs->cs_ctl_initid = -1; 1230 1231 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1232 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1233 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1234 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1235#ifdef ICL_KERNEL_PROXY 1236 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1237#endif 1238 1239 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1240 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1241 cs->cs_conn->ic_error = cfiscsi_error_callback; 1242 cs->cs_conn->ic_prv0 = cs; 1243 1244 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1245 if (error != 0) { 1246 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1247 free(cs, M_CFISCSI); 1248 return (NULL); 1249 } 1250 1251 mtx_lock(&softc->lock); 1252 cs->cs_id = ++softc->last_session_id; 1253 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1254 mtx_unlock(&softc->lock); 1255 1256 /* 1257 * Start pinging the initiator. 1258 */ 1259 callout_init(&cs->cs_callout, 1); 1260 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1261 1262 return (cs); 1263} 1264 1265static void 1266cfiscsi_session_delete(struct cfiscsi_session *cs) 1267{ 1268 struct cfiscsi_softc *softc; 1269 1270 softc = &cfiscsi_softc; 1271 1272 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1273 ("destroying session with outstanding CTL pdus")); 1274 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1275 ("destroying session with non-empty queue")); 1276 1277 cfiscsi_session_unregister_initiator(cs); 1278 if (cs->cs_target != NULL) 1279 cfiscsi_target_release(cs->cs_target); 1280 icl_conn_close(cs->cs_conn); 1281 icl_conn_free(cs->cs_conn); 1282 1283 mtx_lock(&softc->lock); 1284 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1285 mtx_unlock(&softc->lock); 1286 1287 free(cs, M_CFISCSI); 1288} 1289 1290int 1291cfiscsi_init(void) 1292{ 1293 struct cfiscsi_softc *softc; 1294 int retval; 1295 1296 softc = &cfiscsi_softc; 1297 retval = 0; 1298 bzero(softc, sizeof(*softc)); 1299 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1300 1301#ifdef ICL_KERNEL_PROXY 1302 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1303#endif 1304 TAILQ_INIT(&softc->sessions); 1305 TAILQ_INIT(&softc->targets); 1306 1307 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1308 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1309 UMA_ALIGN_PTR, 0); 1310 1311 return (0); 1312} 1313 1314#ifdef ICL_KERNEL_PROXY 1315static void 1316cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1317{ 1318 struct cfiscsi_session *cs; 1319 1320 cs = cfiscsi_session_new(&cfiscsi_softc); 1321 if (cs == NULL) { 1322 CFISCSI_WARN("failed to create session"); 1323 return; 1324 } 1325 1326 icl_conn_handoff_sock(cs->cs_conn, so); 1327 cs->cs_initiator_sa = sa; 1328 cs->cs_portal_id = portal_id; 1329 cs->cs_waiting_for_ctld = true; 1330 cv_signal(&cfiscsi_softc.accept_cv); 1331} 1332#endif 1333 1334static void 1335cfiscsi_online(void *arg) 1336{ 1337 struct cfiscsi_softc *softc; 1338 struct cfiscsi_target *ct; 1339 int online; 1340 1341 ct = (struct cfiscsi_target *)arg; 1342 softc = ct->ct_softc; 1343 1344 mtx_lock(&softc->lock); 1345 if (ct->ct_online) { 1346 mtx_unlock(&softc->lock); 1347 return; 1348 } 1349 ct->ct_online = 1; 1350 online = softc->online++; 1351 mtx_unlock(&softc->lock); 1352 if (online > 0) 1353 return; 1354 1355#ifdef ICL_KERNEL_PROXY 1356 if (softc->listener != NULL) 1357 icl_listen_free(softc->listener); 1358 softc->listener = icl_listen_new(cfiscsi_accept); 1359#endif 1360} 1361 1362static void 1363cfiscsi_offline(void *arg) 1364{ 1365 struct cfiscsi_softc *softc; 1366 struct cfiscsi_target *ct; 1367 struct cfiscsi_session *cs; 1368 int online; 1369 1370 ct = (struct cfiscsi_target *)arg; 1371 softc = ct->ct_softc; 1372 1373 mtx_lock(&softc->lock); 1374 if (!ct->ct_online) { 1375 mtx_unlock(&softc->lock); 1376 return; 1377 } 1378 ct->ct_online = 0; 1379 online = --softc->online; 1380 1381 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1382 if (cs->cs_target == ct) 1383 cfiscsi_session_terminate(cs); 1384 } 1385 mtx_unlock(&softc->lock); 1386 if (online > 0) 1387 return; 1388 1389#ifdef ICL_KERNEL_PROXY 1390 icl_listen_free(softc->listener); 1391 softc->listener = NULL; 1392#endif 1393} 1394 1395static int 1396cfiscsi_info(void *arg, struct sbuf *sb) 1397{ 1398 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1399 int retval; 1400 1401 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1402 ct->ct_state); 1403 return (retval); 1404} 1405 1406static void 1407cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1408{ 1409 struct cfiscsi_softc *softc; 1410 struct cfiscsi_session *cs, *cs2; 1411 struct cfiscsi_target *ct; 1412 struct ctl_iscsi_handoff_params *cihp; 1413 int error; 1414 1415 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1416 softc = &cfiscsi_softc; 1417 1418 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1419 cihp->initiator_name, cihp->initiator_addr, 1420 cihp->target_name); 1421 1422 ct = cfiscsi_target_find(softc, cihp->target_name); 1423 if (ct == NULL) { 1424 ci->status = CTL_ISCSI_ERROR; 1425 snprintf(ci->error_str, sizeof(ci->error_str), 1426 "%s: target not found", __func__); 1427 return; 1428 } 1429 1430#ifdef ICL_KERNEL_PROXY 1431 if (cihp->socket > 0 && cihp->connection_id > 0) { 1432 snprintf(ci->error_str, sizeof(ci->error_str), 1433 "both socket and connection_id set"); 1434 ci->status = CTL_ISCSI_ERROR; 1435 cfiscsi_target_release(ct); 1436 return; 1437 } 1438 if (cihp->socket == 0) { 1439 mtx_lock(&cfiscsi_softc.lock); 1440 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1441 if (cs->cs_id == cihp->connection_id) 1442 break; 1443 } 1444 if (cs == NULL) { 1445 mtx_unlock(&cfiscsi_softc.lock); 1446 snprintf(ci->error_str, sizeof(ci->error_str), 1447 "connection not found"); 1448 ci->status = CTL_ISCSI_ERROR; 1449 cfiscsi_target_release(ct); 1450 return; 1451 } 1452 mtx_unlock(&cfiscsi_softc.lock); 1453 } else { 1454#endif 1455 cs = cfiscsi_session_new(softc); 1456 if (cs == NULL) { 1457 ci->status = CTL_ISCSI_ERROR; 1458 snprintf(ci->error_str, sizeof(ci->error_str), 1459 "%s: cfiscsi_session_new failed", __func__); 1460 cfiscsi_target_release(ct); 1461 return; 1462 } 1463#ifdef ICL_KERNEL_PROXY 1464 } 1465#endif 1466 1467 /* 1468 * First PDU of Full Feature phase has the same CmdSN as the last 1469 * PDU from the Login Phase received from the initiator. Thus, 1470 * the -1 below. 1471 */ 1472 cs->cs_portal_group_tag = cihp->portal_group_tag; 1473 cs->cs_cmdsn = cihp->cmdsn; 1474 cs->cs_statsn = cihp->statsn; 1475 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1476 cs->cs_max_burst_length = cihp->max_burst_length; 1477 cs->cs_immediate_data = !!cihp->immediate_data; 1478 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1479 cs->cs_conn->ic_header_crc32c = true; 1480 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1481 cs->cs_conn->ic_data_crc32c = true; 1482 1483 strlcpy(cs->cs_initiator_name, 1484 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1485 strlcpy(cs->cs_initiator_addr, 1486 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1487 strlcpy(cs->cs_initiator_alias, 1488 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1489 memcpy(cs->cs_initiator_isid, 1490 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1491 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1492 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1493 cihp->initiator_isid[0], cihp->initiator_isid[1], 1494 cihp->initiator_isid[2], cihp->initiator_isid[3], 1495 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1496 1497 mtx_lock(&softc->lock); 1498 if (ct->ct_online == 0) { 1499 mtx_unlock(&softc->lock); 1500 cfiscsi_session_terminate(cs); 1501 cfiscsi_target_release(ct); 1502 ci->status = CTL_ISCSI_ERROR; 1503 snprintf(ci->error_str, sizeof(ci->error_str), 1504 "%s: port offline", __func__); 1505 return; 1506 } 1507 cs->cs_target = ct; 1508 mtx_unlock(&softc->lock); 1509 1510 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1511restart: 1512 if (!cs->cs_terminating) { 1513 mtx_lock(&softc->lock); 1514 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1515 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1516 cs->cs_target == cs2->cs_target && 1517 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1518 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1519 cfiscsi_session_terminate(cs2); 1520 mtx_unlock(&softc->lock); 1521 pause("cfiscsi_reinstate", 1); 1522 goto restart; 1523 } 1524 } 1525 mtx_unlock(&softc->lock); 1526 } 1527 1528 /* 1529 * Register initiator with CTL. 1530 */ 1531 cfiscsi_session_register_initiator(cs); 1532 1533#ifdef ICL_KERNEL_PROXY 1534 if (cihp->socket > 0) { 1535#endif 1536 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1537 if (error != 0) { 1538 cfiscsi_session_terminate(cs); 1539 refcount_release(&cs->cs_outstanding_ctl_pdus); 1540 ci->status = CTL_ISCSI_ERROR; 1541 snprintf(ci->error_str, sizeof(ci->error_str), 1542 "%s: icl_conn_handoff failed with error %d", 1543 __func__, error); 1544 return; 1545 } 1546#ifdef ICL_KERNEL_PROXY 1547 } 1548#endif 1549 1550#ifdef ICL_KERNEL_PROXY 1551 cs->cs_login_phase = false; 1552 1553 /* 1554 * First PDU of the Full Feature phase has likely already arrived. 1555 * We have to pick it up and execute properly. 1556 */ 1557 if (cs->cs_login_pdu != NULL) { 1558 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1559 cfiscsi_pdu_handle(cs->cs_login_pdu); 1560 cs->cs_login_pdu = NULL; 1561 } 1562#endif 1563 1564 refcount_release(&cs->cs_outstanding_ctl_pdus); 1565 ci->status = CTL_ISCSI_OK; 1566} 1567 1568static void 1569cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1570{ 1571 struct ctl_iscsi_list_params *cilp; 1572 struct cfiscsi_session *cs; 1573 struct cfiscsi_softc *softc; 1574 struct sbuf *sb; 1575 int error; 1576 1577 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1578 softc = &cfiscsi_softc; 1579 1580 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1581 if (sb == NULL) { 1582 ci->status = CTL_ISCSI_ERROR; 1583 snprintf(ci->error_str, sizeof(ci->error_str), 1584 "Unable to allocate %d bytes for iSCSI session list", 1585 cilp->alloc_len); 1586 return; 1587 } 1588 1589 sbuf_printf(sb, "<ctlislist>\n"); 1590 mtx_lock(&softc->lock); 1591 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1592#ifdef ICL_KERNEL_PROXY 1593 if (cs->cs_target == NULL) 1594 continue; 1595#endif 1596 error = sbuf_printf(sb, "<connection id=\"%d\">" 1597 "<initiator>%s</initiator>" 1598 "<initiator_addr>%s</initiator_addr>" 1599 "<initiator_alias>%s</initiator_alias>" 1600 "<target>%s</target>" 1601 "<target_alias>%s</target_alias>" 1602 "<header_digest>%s</header_digest>" 1603 "<data_digest>%s</data_digest>" 1604 "<max_data_segment_length>%zd</max_data_segment_length>" 1605 "<immediate_data>%d</immediate_data>" 1606 "<iser>%d</iser>" 1607 "</connection>\n", 1608 cs->cs_id, 1609 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1610 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1611 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1612 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1613 cs->cs_max_data_segment_length, 1614 cs->cs_immediate_data, 1615 cs->cs_conn->ic_iser); 1616 if (error != 0) 1617 break; 1618 } 1619 mtx_unlock(&softc->lock); 1620 error = sbuf_printf(sb, "</ctlislist>\n"); 1621 if (error != 0) { 1622 sbuf_delete(sb); 1623 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1624 snprintf(ci->error_str, sizeof(ci->error_str), 1625 "Out of space, %d bytes is too small", cilp->alloc_len); 1626 return; 1627 } 1628 sbuf_finish(sb); 1629 1630 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1631 cilp->fill_len = sbuf_len(sb) + 1; 1632 ci->status = CTL_ISCSI_OK; 1633 sbuf_delete(sb); 1634} 1635 1636static void 1637cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1638{ 1639 struct icl_pdu *response; 1640 struct iscsi_bhs_asynchronous_message *bhsam; 1641 struct ctl_iscsi_terminate_params *citp; 1642 struct cfiscsi_session *cs; 1643 struct cfiscsi_softc *softc; 1644 int found = 0; 1645 1646 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1647 softc = &cfiscsi_softc; 1648 1649 mtx_lock(&softc->lock); 1650 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1651 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1652 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1653 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1654 continue; 1655 1656 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1657 if (response == NULL) { 1658 /* 1659 * Oh well. Just terminate the connection. 1660 */ 1661 } else { 1662 bhsam = (struct iscsi_bhs_asynchronous_message *) 1663 response->ip_bhs; 1664 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1665 bhsam->bhsam_flags = 0x80; 1666 bhsam->bhsam_0xffffffff = 0xffffffff; 1667 bhsam->bhsam_async_event = 1668 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1669 cfiscsi_pdu_queue(response); 1670 } 1671 cfiscsi_session_terminate(cs); 1672 found++; 1673 } 1674 mtx_unlock(&softc->lock); 1675 1676 if (found == 0) { 1677 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1678 snprintf(ci->error_str, sizeof(ci->error_str), 1679 "No matching connections found"); 1680 return; 1681 } 1682 1683 ci->status = CTL_ISCSI_OK; 1684} 1685 1686static void 1687cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1688{ 1689 struct icl_pdu *response; 1690 struct iscsi_bhs_asynchronous_message *bhsam; 1691 struct ctl_iscsi_logout_params *cilp; 1692 struct cfiscsi_session *cs; 1693 struct cfiscsi_softc *softc; 1694 int found = 0; 1695 1696 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1697 softc = &cfiscsi_softc; 1698 1699 mtx_lock(&softc->lock); 1700 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1701 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1702 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1703 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1704 continue; 1705 1706 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1707 if (response == NULL) { 1708 ci->status = CTL_ISCSI_ERROR; 1709 snprintf(ci->error_str, sizeof(ci->error_str), 1710 "Unable to allocate memory"); 1711 mtx_unlock(&softc->lock); 1712 return; 1713 } 1714 bhsam = 1715 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1716 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1717 bhsam->bhsam_flags = 0x80; 1718 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1719 bhsam->bhsam_parameter3 = htons(10); 1720 cfiscsi_pdu_queue(response); 1721 found++; 1722 } 1723 mtx_unlock(&softc->lock); 1724 1725 if (found == 0) { 1726 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1727 snprintf(ci->error_str, sizeof(ci->error_str), 1728 "No matching connections found"); 1729 return; 1730 } 1731 1732 ci->status = CTL_ISCSI_OK; 1733} 1734 1735#ifdef ICL_KERNEL_PROXY 1736static void 1737cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1738{ 1739 struct ctl_iscsi_listen_params *cilp; 1740 struct sockaddr *sa; 1741 int error; 1742 1743 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1744 1745 if (cfiscsi_softc.listener == NULL) { 1746 CFISCSI_DEBUG("no listener"); 1747 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1748 ci->status = CTL_ISCSI_ERROR; 1749 return; 1750 } 1751 1752 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1753 if (error != 0) { 1754 CFISCSI_DEBUG("getsockaddr, error %d", error); 1755 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1756 ci->status = CTL_ISCSI_ERROR; 1757 return; 1758 } 1759 1760 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1761 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1762 if (error != 0) { 1763 free(sa, M_SONAME); 1764 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1765 snprintf(ci->error_str, sizeof(ci->error_str), 1766 "icl_listen_add failed, error %d", error); 1767 ci->status = CTL_ISCSI_ERROR; 1768 return; 1769 } 1770 1771 ci->status = CTL_ISCSI_OK; 1772} 1773 1774static void 1775cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1776{ 1777 struct ctl_iscsi_accept_params *ciap; 1778 struct cfiscsi_session *cs; 1779 int error; 1780 1781 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1782 1783 mtx_lock(&cfiscsi_softc.lock); 1784 for (;;) { 1785 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1786 if (cs->cs_waiting_for_ctld) 1787 break; 1788 } 1789 if (cs != NULL) 1790 break; 1791 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1792 if (error != 0) { 1793 mtx_unlock(&cfiscsi_softc.lock); 1794 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1795 ci->status = CTL_ISCSI_ERROR; 1796 return; 1797 } 1798 } 1799 mtx_unlock(&cfiscsi_softc.lock); 1800 1801 cs->cs_waiting_for_ctld = false; 1802 cs->cs_login_phase = true; 1803 1804 ciap->connection_id = cs->cs_id; 1805 ciap->portal_id = cs->cs_portal_id; 1806 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1807 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1808 cs->cs_initiator_sa->sa_len); 1809 if (error != 0) { 1810 snprintf(ci->error_str, sizeof(ci->error_str), 1811 "copyout failed with error %d", error); 1812 ci->status = CTL_ISCSI_ERROR; 1813 return; 1814 } 1815 1816 ci->status = CTL_ISCSI_OK; 1817} 1818 1819static void 1820cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1821{ 1822 struct ctl_iscsi_send_params *cisp; 1823 struct cfiscsi_session *cs; 1824 struct icl_pdu *ip; 1825 size_t datalen; 1826 void *data; 1827 int error; 1828 1829 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1830 1831 mtx_lock(&cfiscsi_softc.lock); 1832 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1833 if (cs->cs_id == cisp->connection_id) 1834 break; 1835 } 1836 if (cs == NULL) { 1837 mtx_unlock(&cfiscsi_softc.lock); 1838 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1839 ci->status = CTL_ISCSI_ERROR; 1840 return; 1841 } 1842 mtx_unlock(&cfiscsi_softc.lock); 1843 1844#if 0 1845 if (cs->cs_login_phase == false) 1846 return (EBUSY); 1847#endif 1848 1849 if (cs->cs_terminating) { 1850 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1851 ci->status = CTL_ISCSI_ERROR; 1852 return; 1853 } 1854 1855 datalen = cisp->data_segment_len; 1856 /* 1857 * XXX 1858 */ 1859 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1860 if (datalen > 65535) { 1861 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1862 ci->status = CTL_ISCSI_ERROR; 1863 return; 1864 } 1865 if (datalen > 0) { 1866 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1867 error = copyin(cisp->data_segment, data, datalen); 1868 if (error != 0) { 1869 free(data, M_CFISCSI); 1870 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1871 ci->status = CTL_ISCSI_ERROR; 1872 return; 1873 } 1874 } 1875 1876 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1877 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1878 if (datalen > 0) { 1879 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1880 free(data, M_CFISCSI); 1881 } 1882 CFISCSI_SESSION_LOCK(cs); 1883 icl_pdu_queue(ip); 1884 CFISCSI_SESSION_UNLOCK(cs); 1885 ci->status = CTL_ISCSI_OK; 1886} 1887 1888static void 1889cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1890{ 1891 struct ctl_iscsi_receive_params *cirp; 1892 struct cfiscsi_session *cs; 1893 struct icl_pdu *ip; 1894 void *data; 1895 int error; 1896 1897 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1898 1899 mtx_lock(&cfiscsi_softc.lock); 1900 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1901 if (cs->cs_id == cirp->connection_id) 1902 break; 1903 } 1904 if (cs == NULL) { 1905 mtx_unlock(&cfiscsi_softc.lock); 1906 snprintf(ci->error_str, sizeof(ci->error_str), 1907 "connection not found"); 1908 ci->status = CTL_ISCSI_ERROR; 1909 return; 1910 } 1911 mtx_unlock(&cfiscsi_softc.lock); 1912 1913#if 0 1914 if (is->is_login_phase == false) 1915 return (EBUSY); 1916#endif 1917 1918 CFISCSI_SESSION_LOCK(cs); 1919 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1920 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1921 if (error != 0) { 1922 CFISCSI_SESSION_UNLOCK(cs); 1923 snprintf(ci->error_str, sizeof(ci->error_str), 1924 "interrupted by signal"); 1925 ci->status = CTL_ISCSI_ERROR; 1926 return; 1927 } 1928 } 1929 1930 if (cs->cs_terminating) { 1931 CFISCSI_SESSION_UNLOCK(cs); 1932 snprintf(ci->error_str, sizeof(ci->error_str), 1933 "connection terminating"); 1934 ci->status = CTL_ISCSI_ERROR; 1935 return; 1936 } 1937 ip = cs->cs_login_pdu; 1938 cs->cs_login_pdu = NULL; 1939 CFISCSI_SESSION_UNLOCK(cs); 1940 1941 if (ip->ip_data_len > cirp->data_segment_len) { 1942 icl_pdu_free(ip); 1943 snprintf(ci->error_str, sizeof(ci->error_str), 1944 "data segment too big"); 1945 ci->status = CTL_ISCSI_ERROR; 1946 return; 1947 } 1948 1949 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1950 if (ip->ip_data_len > 0) { 1951 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1952 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1953 copyout(data, cirp->data_segment, ip->ip_data_len); 1954 free(data, M_CFISCSI); 1955 } 1956 1957 icl_pdu_free(ip); 1958 ci->status = CTL_ISCSI_OK; 1959} 1960 1961#endif /* !ICL_KERNEL_PROXY */ 1962 1963static void 1964cfiscsi_ioctl_port_create(struct ctl_req *req) 1965{ 1966 struct cfiscsi_target *ct; 1967 struct ctl_port *port; 1968 const char *target, *alias, *tag; 1969 struct scsi_vpd_id_descriptor *desc; 1970 ctl_options_t opts; 1971 int retval, len, idlen; 1972 1973 ctl_init_opts(&opts, req->num_args, req->kern_args); 1974 target = ctl_get_opt(&opts, "cfiscsi_target"); 1975 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1976 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1977 if (target == NULL || tag == NULL) { 1978 req->status = CTL_LUN_ERROR; 1979 snprintf(req->error_str, sizeof(req->error_str), 1980 "Missing required argument"); 1981 ctl_free_opts(&opts); 1982 return; 1983 } 1984 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1985 if (ct == NULL) { 1986 req->status = CTL_LUN_ERROR; 1987 snprintf(req->error_str, sizeof(req->error_str), 1988 "failed to create target \"%s\"", target); 1989 ctl_free_opts(&opts); 1990 return; 1991 } 1992 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1993 req->status = CTL_LUN_ERROR; 1994 snprintf(req->error_str, sizeof(req->error_str), 1995 "target \"%s\" already exists", target); 1996 cfiscsi_target_release(ct); 1997 ctl_free_opts(&opts); 1998 return; 1999 } 2000 port = &ct->ct_port; 2001 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2002 goto done; 2003 2004 port->frontend = &cfiscsi_frontend; 2005 port->port_type = CTL_PORT_ISCSI; 2006 /* XXX KDM what should the real number be here? */ 2007 port->num_requested_ctl_io = 4096; 2008 port->port_name = "iscsi"; 2009 port->physical_port = strtoul(tag, NULL, 0); 2010 port->virtual_port = ct->ct_target_id; 2011 port->port_online = cfiscsi_online; 2012 port->port_offline = cfiscsi_offline; 2013 port->port_info = cfiscsi_info; 2014 port->onoff_arg = ct; 2015 port->lun_enable = cfiscsi_lun_enable; 2016 port->lun_disable = cfiscsi_lun_disable; 2017 port->lun_map = cfiscsi_lun_map; 2018 port->targ_lun_arg = ct; 2019 port->fe_datamove = cfiscsi_datamove; 2020 port->fe_done = cfiscsi_done; 2021 2022 /* XXX KDM what should we report here? */ 2023 /* XXX These should probably be fetched from CTL. */ 2024 port->max_targets = 1; 2025 port->max_target_id = 15; 2026 2027 port->options = opts; 2028 STAILQ_INIT(&opts); 2029 2030 /* Generate Port ID. */ 2031 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2032 idlen = roundup2(idlen, 4); 2033 len = sizeof(struct scsi_vpd_device_id) + idlen; 2034 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2035 M_CTL, M_WAITOK | M_ZERO); 2036 port->port_devid->len = len; 2037 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2038 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2039 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2040 SVPD_ID_TYPE_SCSI_NAME; 2041 desc->length = idlen; 2042 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2043 target, port->physical_port); 2044 2045 /* Generate Target ID. */ 2046 idlen = strlen(target) + 1; 2047 idlen = roundup2(idlen, 4); 2048 len = sizeof(struct scsi_vpd_device_id) + idlen; 2049 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2050 M_CTL, M_WAITOK | M_ZERO); 2051 port->target_devid->len = len; 2052 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2053 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2054 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2055 SVPD_ID_TYPE_SCSI_NAME; 2056 desc->length = idlen; 2057 strlcpy(desc->identifier, target, idlen); 2058 2059 retval = ctl_port_register(port); 2060 if (retval != 0) { 2061 ctl_free_opts(&port->options); 2062 cfiscsi_target_release(ct); 2063 free(port->port_devid, M_CFISCSI); 2064 free(port->target_devid, M_CFISCSI); 2065 req->status = CTL_LUN_ERROR; 2066 snprintf(req->error_str, sizeof(req->error_str), 2067 "ctl_frontend_register() failed with error %d", retval); 2068 return; 2069 } 2070done: 2071 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2072 req->status = CTL_LUN_OK; 2073 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2074 sizeof(port->targ_port)); //XXX 2075} 2076 2077static void 2078cfiscsi_ioctl_port_remove(struct ctl_req *req) 2079{ 2080 struct cfiscsi_target *ct; 2081 const char *target; 2082 ctl_options_t opts; 2083 2084 ctl_init_opts(&opts, req->num_args, req->kern_args); 2085 target = ctl_get_opt(&opts, "cfiscsi_target"); 2086 if (target == NULL) { 2087 ctl_free_opts(&opts); 2088 req->status = CTL_LUN_ERROR; 2089 snprintf(req->error_str, sizeof(req->error_str), 2090 "Missing required argument"); 2091 return; 2092 } 2093 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2094 if (ct == NULL) { 2095 ctl_free_opts(&opts); 2096 req->status = CTL_LUN_ERROR; 2097 snprintf(req->error_str, sizeof(req->error_str), 2098 "can't find target \"%s\"", target); 2099 return; 2100 } 2101 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2102 ctl_free_opts(&opts); 2103 req->status = CTL_LUN_ERROR; 2104 snprintf(req->error_str, sizeof(req->error_str), 2105 "target \"%s\" is already dying", target); 2106 return; 2107 } 2108 ctl_free_opts(&opts); 2109 2110 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2111 ctl_port_offline(&ct->ct_port); 2112 cfiscsi_target_release(ct); 2113 cfiscsi_target_release(ct); 2114} 2115 2116static int 2117cfiscsi_ioctl(struct cdev *dev, 2118 u_long cmd, caddr_t addr, int flag, struct thread *td) 2119{ 2120 struct ctl_iscsi *ci; 2121 struct ctl_req *req; 2122 2123 if (cmd == CTL_PORT_REQ) { 2124 req = (struct ctl_req *)addr; 2125 switch (req->reqtype) { 2126 case CTL_REQ_CREATE: 2127 cfiscsi_ioctl_port_create(req); 2128 break; 2129 case CTL_REQ_REMOVE: 2130 cfiscsi_ioctl_port_remove(req); 2131 break; 2132 default: 2133 req->status = CTL_LUN_ERROR; 2134 snprintf(req->error_str, sizeof(req->error_str), 2135 "Unsupported request type %d", req->reqtype); 2136 } 2137 return (0); 2138 } 2139 2140 if (cmd != CTL_ISCSI) 2141 return (ENOTTY); 2142 2143 ci = (struct ctl_iscsi *)addr; 2144 switch (ci->type) { 2145 case CTL_ISCSI_HANDOFF: 2146 cfiscsi_ioctl_handoff(ci); 2147 break; 2148 case CTL_ISCSI_LIST: 2149 cfiscsi_ioctl_list(ci); 2150 break; 2151 case CTL_ISCSI_TERMINATE: 2152 cfiscsi_ioctl_terminate(ci); 2153 break; 2154 case CTL_ISCSI_LOGOUT: 2155 cfiscsi_ioctl_logout(ci); 2156 break; 2157#ifdef ICL_KERNEL_PROXY 2158 case CTL_ISCSI_LISTEN: 2159 cfiscsi_ioctl_listen(ci); 2160 break; 2161 case CTL_ISCSI_ACCEPT: 2162 cfiscsi_ioctl_accept(ci); 2163 break; 2164 case CTL_ISCSI_SEND: 2165 cfiscsi_ioctl_send(ci); 2166 break; 2167 case CTL_ISCSI_RECEIVE: 2168 cfiscsi_ioctl_receive(ci); 2169 break; 2170#else 2171 case CTL_ISCSI_LISTEN: 2172 case CTL_ISCSI_ACCEPT: 2173 case CTL_ISCSI_SEND: 2174 case CTL_ISCSI_RECEIVE: 2175 ci->status = CTL_ISCSI_ERROR; 2176 snprintf(ci->error_str, sizeof(ci->error_str), 2177 "%s: CTL compiled without ICL_KERNEL_PROXY", 2178 __func__); 2179 break; 2180#endif /* !ICL_KERNEL_PROXY */ 2181 default: 2182 ci->status = CTL_ISCSI_ERROR; 2183 snprintf(ci->error_str, sizeof(ci->error_str), 2184 "%s: invalid iSCSI request type %d", __func__, ci->type); 2185 break; 2186 } 2187 2188 return (0); 2189} 2190 2191static void 2192cfiscsi_target_hold(struct cfiscsi_target *ct) 2193{ 2194 2195 refcount_acquire(&ct->ct_refcount); 2196} 2197 2198static void 2199cfiscsi_target_release(struct cfiscsi_target *ct) 2200{ 2201 struct cfiscsi_softc *softc; 2202 2203 softc = ct->ct_softc; 2204 mtx_lock(&softc->lock); 2205 if (refcount_release(&ct->ct_refcount)) { 2206 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2207 mtx_unlock(&softc->lock); 2208 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2209 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2210 if (ctl_port_deregister(&ct->ct_port) != 0) 2211 printf("%s: ctl_port_deregister() failed\n", 2212 __func__); 2213 } 2214 free(ct, M_CFISCSI); 2215 2216 return; 2217 } 2218 mtx_unlock(&softc->lock); 2219} 2220 2221static struct cfiscsi_target * 2222cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2223{ 2224 struct cfiscsi_target *ct; 2225 2226 mtx_lock(&softc->lock); 2227 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2228 if (strcmp(name, ct->ct_name) != 0 || 2229 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2230 continue; 2231 cfiscsi_target_hold(ct); 2232 mtx_unlock(&softc->lock); 2233 return (ct); 2234 } 2235 mtx_unlock(&softc->lock); 2236 2237 return (NULL); 2238} 2239 2240static struct cfiscsi_target * 2241cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2242 const char *alias) 2243{ 2244 struct cfiscsi_target *ct, *newct; 2245 int i; 2246 2247 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2248 return (NULL); 2249 2250 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2251 2252 mtx_lock(&softc->lock); 2253 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2254 if (strcmp(name, ct->ct_name) != 0 || 2255 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2256 continue; 2257 cfiscsi_target_hold(ct); 2258 mtx_unlock(&softc->lock); 2259 free(newct, M_CFISCSI); 2260 return (ct); 2261 } 2262 2263 for (i = 0; i < CTL_MAX_LUNS; i++) 2264 newct->ct_luns[i] = UINT32_MAX; 2265 2266 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2267 if (alias != NULL) 2268 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2269 refcount_init(&newct->ct_refcount, 1); 2270 newct->ct_softc = softc; 2271 if (TAILQ_EMPTY(&softc->targets)) 2272 softc->last_target_id = 0; 2273 newct->ct_target_id = ++softc->last_target_id; 2274 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2275 mtx_unlock(&softc->lock); 2276 2277 return (newct); 2278} 2279 2280/* 2281 * Takes LUN from the target space and returns LUN from the CTL space. 2282 */ 2283static uint32_t 2284cfiscsi_lun_map(void *arg, uint32_t lun) 2285{ 2286 struct cfiscsi_target *ct = arg; 2287 2288 if (lun >= CTL_MAX_LUNS) { 2289 CFISCSI_DEBUG("requested lun number %d is higher " 2290 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2291 return (UINT32_MAX); 2292 } 2293 return (ct->ct_luns[lun]); 2294} 2295 2296static int 2297cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2298 unsigned long lun_id, unsigned long ctl_lun_id) 2299{ 2300 2301 if (lun_id >= CTL_MAX_LUNS) { 2302 CFISCSI_WARN("requested lun number %ld is higher " 2303 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2304 return (-1); 2305 } 2306 2307 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2308 /* 2309 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2310 * when the LUN is created, and a second time just before 2311 * the port is brought online; don't emit warnings 2312 * for that case. 2313 */ 2314 if (ct->ct_luns[lun_id] == ctl_lun_id) 2315 return (0); 2316 CFISCSI_WARN("lun %ld already allocated", lun_id); 2317 return (-1); 2318 } 2319 2320#if 0 2321 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2322 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2323#endif 2324 2325 ct->ct_luns[lun_id] = ctl_lun_id; 2326 2327 return (0); 2328} 2329 2330static int 2331cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2332{ 2333 struct cfiscsi_softc *softc; 2334 struct cfiscsi_target *ct; 2335 const char *target = NULL; 2336 const char *lun = NULL; 2337 unsigned long tmp; 2338 2339 ct = (struct cfiscsi_target *)arg; 2340 softc = ct->ct_softc; 2341 2342 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2343 "cfiscsi_target"); 2344 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2345 "cfiscsi_lun"); 2346 2347 if (target == NULL && lun == NULL) 2348 return (0); 2349 2350 if (target == NULL || lun == NULL) { 2351 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2352 "cfiscsi_lun, or the other way around; ignoring"); 2353 return (0); 2354 } 2355 2356 if (strcmp(target, ct->ct_name) != 0) 2357 return (0); 2358 2359 tmp = strtoul(lun, NULL, 10); 2360 cfiscsi_target_set_lun(ct, tmp, lun_id); 2361 return (0); 2362} 2363 2364static int 2365cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2366{ 2367 struct cfiscsi_softc *softc; 2368 struct cfiscsi_target *ct; 2369 int i; 2370 2371 ct = (struct cfiscsi_target *)arg; 2372 softc = ct->ct_softc; 2373 2374 mtx_lock(&softc->lock); 2375 for (i = 0; i < CTL_MAX_LUNS; i++) { 2376 if (ct->ct_luns[i] != lun_id) 2377 continue; 2378 ct->ct_luns[i] = UINT32_MAX; 2379 break; 2380 } 2381 mtx_unlock(&softc->lock); 2382 return (0); 2383} 2384 2385static void 2386cfiscsi_datamove_in(union ctl_io *io) 2387{ 2388 struct cfiscsi_session *cs; 2389 struct icl_pdu *request, *response; 2390 const struct iscsi_bhs_scsi_command *bhssc; 2391 struct iscsi_bhs_data_in *bhsdi; 2392 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2393 size_t len, expected_len, sg_len, buffer_offset; 2394 const char *sg_addr; 2395 int ctl_sg_count, error, i; 2396 2397 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2398 cs = PDU_SESSION(request); 2399 2400 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2401 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2402 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2403 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2404 2405 if (io->scsiio.kern_sg_entries > 0) { 2406 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2407 ctl_sg_count = io->scsiio.kern_sg_entries; 2408 } else { 2409 ctl_sglist = &ctl_sg_entry; 2410 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2411 ctl_sglist->len = io->scsiio.kern_data_len; 2412 ctl_sg_count = 1; 2413 } 2414 2415 /* 2416 * This is the total amount of data to be transferred within the current 2417 * SCSI command. We need to record it so that we can properly report 2418 * underflow/underflow. 2419 */ 2420 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2421 2422 /* 2423 * This is the offset within the current SCSI command; for the first 2424 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2425 * it will be the sum of lengths of previous ones. 2426 */ 2427 buffer_offset = io->scsiio.kern_rel_offset; 2428 2429 /* 2430 * This is the transfer length expected by the initiator. In theory, 2431 * it could be different from the correct amount of data from the SCSI 2432 * point of view, even if that doesn't make any sense. 2433 */ 2434 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2435#if 0 2436 if (expected_len != io->scsiio.kern_total_len) { 2437 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2438 "actual length %zd", expected_len, 2439 (size_t)io->scsiio.kern_total_len); 2440 } 2441#endif 2442 2443 if (buffer_offset >= expected_len) { 2444#if 0 2445 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2446 "already sent the expected len", buffer_offset); 2447#endif 2448 io->scsiio.be_move_done(io); 2449 return; 2450 } 2451 2452 i = 0; 2453 sg_addr = NULL; 2454 sg_len = 0; 2455 response = NULL; 2456 bhsdi = NULL; 2457 for (;;) { 2458 if (response == NULL) { 2459 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2460 if (response == NULL) { 2461 CFISCSI_SESSION_WARN(cs, "failed to " 2462 "allocate memory; dropping connection"); 2463 ctl_set_busy(&io->scsiio); 2464 io->scsiio.be_move_done(io); 2465 cfiscsi_session_terminate(cs); 2466 return; 2467 } 2468 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2469 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2470 bhsdi->bhsdi_initiator_task_tag = 2471 bhssc->bhssc_initiator_task_tag; 2472 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2473 PDU_EXPDATASN(request)++; 2474 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2475 } 2476 2477 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2478 if (sg_len == 0) { 2479 sg_addr = ctl_sglist[i].addr; 2480 sg_len = ctl_sglist[i].len; 2481 KASSERT(sg_len > 0, ("sg_len <= 0")); 2482 } 2483 2484 len = sg_len; 2485 2486 /* 2487 * Truncate to maximum data segment length. 2488 */ 2489 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2490 ("ip_data_len %zd >= max_data_segment_length %zd", 2491 response->ip_data_len, cs->cs_max_data_segment_length)); 2492 if (response->ip_data_len + len > 2493 cs->cs_max_data_segment_length) { 2494 len = cs->cs_max_data_segment_length - 2495 response->ip_data_len; 2496 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2497 len, sg_len)); 2498 } 2499 2500 /* 2501 * Truncate to expected data transfer length. 2502 */ 2503 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2504 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2505 buffer_offset, response->ip_data_len, expected_len)); 2506 if (buffer_offset + response->ip_data_len + len > expected_len) { 2507 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2508 "to expected data transfer length %zd", 2509 buffer_offset + response->ip_data_len + len, expected_len); 2510 len = expected_len - (buffer_offset + response->ip_data_len); 2511 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2512 len, sg_len)); 2513 } 2514 2515 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2516 if (error != 0) { 2517 CFISCSI_SESSION_WARN(cs, "failed to " 2518 "allocate memory; dropping connection"); 2519 icl_pdu_free(response); 2520 ctl_set_busy(&io->scsiio); 2521 io->scsiio.be_move_done(io); 2522 cfiscsi_session_terminate(cs); 2523 return; 2524 } 2525 sg_addr += len; 2526 sg_len -= len; 2527 2528 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2529 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2530 buffer_offset, response->ip_data_len, expected_len)); 2531 if (buffer_offset + response->ip_data_len == expected_len) { 2532 /* 2533 * Already have the amount of data the initiator wanted. 2534 */ 2535 break; 2536 } 2537 2538 if (sg_len == 0) { 2539 /* 2540 * End of scatter-gather segment; 2541 * proceed to the next one... 2542 */ 2543 if (i == ctl_sg_count - 1) { 2544 /* 2545 * ... unless this was the last one. 2546 */ 2547 break; 2548 } 2549 i++; 2550 } 2551 2552 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2553 /* 2554 * Can't stuff more data into the current PDU; 2555 * queue it. Note that's not enough to check 2556 * for kern_data_resid == 0 instead; there 2557 * may be several Data-In PDUs for the final 2558 * call to cfiscsi_datamove(), and we want 2559 * to set the F flag only on the last of them. 2560 */ 2561 buffer_offset += response->ip_data_len; 2562 if (buffer_offset == io->scsiio.kern_total_len || 2563 buffer_offset == expected_len) 2564 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2565 cfiscsi_pdu_queue(response); 2566 response = NULL; 2567 bhsdi = NULL; 2568 } 2569 } 2570 if (response != NULL) { 2571 buffer_offset += response->ip_data_len; 2572 if (buffer_offset == io->scsiio.kern_total_len || 2573 buffer_offset == expected_len) 2574 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2575 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2576 cfiscsi_pdu_queue(response); 2577 } 2578 2579 io->scsiio.be_move_done(io); 2580} 2581 2582static void 2583cfiscsi_datamove_out(union ctl_io *io) 2584{ 2585 struct cfiscsi_session *cs; 2586 struct icl_pdu *request, *response; 2587 const struct iscsi_bhs_scsi_command *bhssc; 2588 struct iscsi_bhs_r2t *bhsr2t; 2589 struct cfiscsi_data_wait *cdw; 2590 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2591 uint32_t expected_len, r2t_off, r2t_len; 2592 uint32_t target_transfer_tag; 2593 bool done; 2594 2595 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2596 cs = PDU_SESSION(request); 2597 2598 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2599 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2600 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2601 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2602 2603 /* 2604 * We need to record it so that we can properly report 2605 * underflow/underflow. 2606 */ 2607 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2608 2609 /* 2610 * Report write underflow as error since CTL and backends don't 2611 * really support it, and SCSI does not tell how to do it right. 2612 */ 2613 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2614 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2615 expected_len) { 2616 io->scsiio.io_hdr.port_status = 43; 2617 io->scsiio.be_move_done(io); 2618 return; 2619 } 2620 2621 target_transfer_tag = 2622 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2623 2624#if 0 2625 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2626 "task tag 0x%x, target transfer tag 0x%x", 2627 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2628#endif 2629 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2630 if (cdw == NULL) { 2631 CFISCSI_SESSION_WARN(cs, "failed to " 2632 "allocate memory; dropping connection"); 2633 ctl_set_busy(&io->scsiio); 2634 io->scsiio.be_move_done(io); 2635 cfiscsi_session_terminate(cs); 2636 return; 2637 } 2638 cdw->cdw_ctl_io = io; 2639 cdw->cdw_target_transfer_tag = target_transfer_tag; 2640 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2641 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2642 2643 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2644 if (io->scsiio.kern_sg_entries > 0) { 2645 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2646 } else { 2647 ctl_sglist = &ctl_sg_entry; 2648 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2649 ctl_sglist->len = io->scsiio.kern_data_len; 2650 } 2651 cdw->cdw_sg_index = 0; 2652 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2653 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2654 r2t_off = io->scsiio.ext_data_filled; 2655 while (r2t_off > 0) { 2656 if (r2t_off >= cdw->cdw_sg_len) { 2657 r2t_off -= cdw->cdw_sg_len; 2658 cdw->cdw_sg_index++; 2659 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2660 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2661 continue; 2662 } 2663 cdw->cdw_sg_addr += r2t_off; 2664 cdw->cdw_sg_len -= r2t_off; 2665 r2t_off = 0; 2666 } 2667 2668 if (cs->cs_immediate_data && 2669 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2670 icl_pdu_data_segment_length(request)) { 2671 done = cfiscsi_handle_data_segment(request, cdw); 2672 if (done) { 2673 uma_zfree(cfiscsi_data_wait_zone, cdw); 2674 io->scsiio.be_move_done(io); 2675 return; 2676 } 2677 } 2678 2679 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2680 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2681 cs->cs_max_burst_length); 2682 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2683 2684 CFISCSI_SESSION_LOCK(cs); 2685 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2686 CFISCSI_SESSION_UNLOCK(cs); 2687 2688 /* 2689 * XXX: We should limit the number of outstanding R2T PDUs 2690 * per task to MaxOutstandingR2T. 2691 */ 2692 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2693 if (response == NULL) { 2694 CFISCSI_SESSION_WARN(cs, "failed to " 2695 "allocate memory; dropping connection"); 2696 ctl_set_busy(&io->scsiio); 2697 io->scsiio.be_move_done(io); 2698 cfiscsi_session_terminate(cs); 2699 return; 2700 } 2701 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2702 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2703 bhsr2t->bhsr2t_flags = 0x80; 2704 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2705 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2706 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2707 /* 2708 * XXX: Here we assume that cfiscsi_datamove() won't ever 2709 * be running concurrently on several CPUs for a given 2710 * command. 2711 */ 2712 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2713 PDU_R2TSN(request)++; 2714 /* 2715 * This is the offset within the current SCSI command; 2716 * i.e. for the first call of datamove(), it will be 0, 2717 * and for subsequent ones it will be the sum of lengths 2718 * of previous ones. 2719 * 2720 * The ext_data_filled is to account for unsolicited 2721 * (immediate) data that might have already arrived. 2722 */ 2723 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2724 /* 2725 * This is the total length (sum of S/G lengths) this call 2726 * to cfiscsi_datamove() is supposed to handle, limited by 2727 * MaxBurstLength. 2728 */ 2729 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2730 cfiscsi_pdu_queue(response); 2731} 2732 2733static void 2734cfiscsi_datamove(union ctl_io *io) 2735{ 2736 2737 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2738 cfiscsi_datamove_in(io); 2739 else { 2740 /* We hadn't received anything during this datamove yet. */ 2741 io->scsiio.ext_data_filled = 0; 2742 cfiscsi_datamove_out(io); 2743 } 2744} 2745 2746static void 2747cfiscsi_scsi_command_done(union ctl_io *io) 2748{ 2749 struct icl_pdu *request, *response; 2750 struct iscsi_bhs_scsi_command *bhssc; 2751 struct iscsi_bhs_scsi_response *bhssr; 2752#ifdef DIAGNOSTIC 2753 struct cfiscsi_data_wait *cdw; 2754#endif 2755 struct cfiscsi_session *cs; 2756 uint16_t sense_length; 2757 2758 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2759 cs = PDU_SESSION(request); 2760 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2761 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2762 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2763 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2764 2765 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2766 // bhssc->bhssc_initiator_task_tag); 2767 2768#ifdef DIAGNOSTIC 2769 CFISCSI_SESSION_LOCK(cs); 2770 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2771 KASSERT(bhssc->bhssc_initiator_task_tag != 2772 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2773 CFISCSI_SESSION_UNLOCK(cs); 2774#endif 2775 2776 /* 2777 * Do not return status for aborted commands. 2778 * There are exceptions, but none supported by CTL yet. 2779 */ 2780 if ((io->io_hdr.flags & CTL_FLAG_ABORT) && 2781 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) { 2782 ctl_free_io(io); 2783 icl_pdu_free(request); 2784 return; 2785 } 2786 2787 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2788 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2789 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2790 bhssr->bhssr_flags = 0x80; 2791 /* 2792 * XXX: We don't deal with bidirectional under/overflows; 2793 * does anything actually support those? 2794 */ 2795 if (PDU_TOTAL_TRANSFER_LEN(request) < 2796 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2797 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2798 bhssr->bhssr_residual_count = 2799 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2800 PDU_TOTAL_TRANSFER_LEN(request)); 2801 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2802 // ntohl(bhssr->bhssr_residual_count)); 2803 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2804 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2805 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2806 bhssr->bhssr_residual_count = 2807 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2808 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2809 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2810 // ntohl(bhssr->bhssr_residual_count)); 2811 } 2812 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2813 bhssr->bhssr_status = io->scsiio.scsi_status; 2814 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2815 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2816 2817 if (io->scsiio.sense_len > 0) { 2818#if 0 2819 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2820 io->scsiio.sense_len); 2821#endif 2822 sense_length = htons(io->scsiio.sense_len); 2823 icl_pdu_append_data(response, 2824 &sense_length, sizeof(sense_length), M_WAITOK); 2825 icl_pdu_append_data(response, 2826 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2827 } 2828 2829 ctl_free_io(io); 2830 icl_pdu_free(request); 2831 cfiscsi_pdu_queue(response); 2832} 2833 2834static void 2835cfiscsi_task_management_done(union ctl_io *io) 2836{ 2837 struct icl_pdu *request, *response; 2838 struct iscsi_bhs_task_management_request *bhstmr; 2839 struct iscsi_bhs_task_management_response *bhstmr2; 2840 struct cfiscsi_data_wait *cdw, *tmpcdw; 2841 struct cfiscsi_session *cs; 2842 2843 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2844 cs = PDU_SESSION(request); 2845 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2846 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2847 ISCSI_BHS_OPCODE_TASK_REQUEST, 2848 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2849 2850#if 0 2851 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2852 bhstmr->bhstmr_initiator_task_tag, 2853 bhstmr->bhstmr_referenced_task_tag); 2854#endif 2855 2856 if ((bhstmr->bhstmr_function & ~0x80) == 2857 BHSTMR_FUNCTION_ABORT_TASK) { 2858 /* 2859 * Make sure we no longer wait for Data-Out for this command. 2860 */ 2861 CFISCSI_SESSION_LOCK(cs); 2862 TAILQ_FOREACH_SAFE(cdw, 2863 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2864 if (bhstmr->bhstmr_referenced_task_tag != 2865 cdw->cdw_initiator_task_tag) 2866 continue; 2867 2868#if 0 2869 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2870 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2871#endif 2872 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2873 cdw, cdw_next); 2874 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2875 uma_zfree(cfiscsi_data_wait_zone, cdw); 2876 } 2877 CFISCSI_SESSION_UNLOCK(cs); 2878 } 2879 2880 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2881 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2882 response->ip_bhs; 2883 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2884 bhstmr2->bhstmr_flags = 0x80; 2885 if (io->io_hdr.status == CTL_SUCCESS) { 2886 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2887 } else { 2888 /* 2889 * XXX: How to figure out what exactly went wrong? iSCSI spec 2890 * expects us to provide detailed error, e.g. "Task does 2891 * not exist" or "LUN does not exist". 2892 */ 2893 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2894 bhstmr2->bhstmr_response = 2895 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2896 } 2897 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2898 2899 ctl_free_io(io); 2900 icl_pdu_free(request); 2901 cfiscsi_pdu_queue(response); 2902} 2903 2904static void 2905cfiscsi_done(union ctl_io *io) 2906{ 2907 struct icl_pdu *request; 2908 struct cfiscsi_session *cs; 2909 2910 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2911 ("invalid CTL status %#x", io->io_hdr.status)); 2912 2913 if (io->io_hdr.io_type == CTL_IO_TASK && 2914 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2915 /* 2916 * Implicit task termination has just completed; nothing to do. 2917 */ 2918 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2919 cs->cs_tasks_aborted = true; 2920 refcount_release(&cs->cs_outstanding_ctl_pdus); 2921 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2922 ctl_free_io(io); 2923 return; 2924 } 2925 2926 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2927 cs = PDU_SESSION(request); 2928 refcount_release(&cs->cs_outstanding_ctl_pdus); 2929 2930 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2931 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2932 cfiscsi_scsi_command_done(io); 2933 break; 2934 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2935 cfiscsi_task_management_done(io); 2936 break; 2937 default: 2938 panic("cfiscsi_done called with wrong opcode 0x%x", 2939 request->ip_bhs->bhs_opcode); 2940 } 2941} 2942