ctl_frontend_iscsi.c revision 268678
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 268678 2014-07-15 16:58:38Z 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 268678 2014-07-15 16:58:38Z 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 "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 = 3; 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_lun_enable(void *arg, 153 struct ctl_id target_id, int lun_id); 154static int cfiscsi_lun_disable(void *arg, 155 struct ctl_id target_id, int lun_id); 156static int cfiscsi_ioctl(struct cdev *dev, 157 u_long cmd, caddr_t addr, int flag, struct thread *td); 158static int cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len); 159static void cfiscsi_datamove(union ctl_io *io); 160static void cfiscsi_done(union ctl_io *io); 161static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun); 162static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 163static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 164static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 165static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 168static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 169static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 170 *softc, const char *name); 171static void cfiscsi_target_release(struct cfiscsi_target *ct); 172static void cfiscsi_session_delete(struct cfiscsi_session *cs); 173 174static struct cfiscsi_softc cfiscsi_softc; 175extern struct ctl_softc *control_softc; 176 177static struct ctl_frontend cfiscsi_frontend = 178{ 179 .name = "iscsi", 180 .init = cfiscsi_init, 181 .ioctl = cfiscsi_ioctl, 182}; 183CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 184 185static struct icl_pdu * 186cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 187{ 188 189 return (icl_pdu_new_bhs(request->ip_conn, flags)); 190} 191 192static bool 193cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 194{ 195 const struct iscsi_bhs_scsi_command *bhssc; 196 struct cfiscsi_session *cs; 197 uint32_t cmdsn, expstatsn; 198 199 cs = PDU_SESSION(request); 200 201 /* 202 * Every incoming PDU - not just NOP-Out - resets the ping timer. 203 * The purpose of the timeout is to reset the connection when it stalls; 204 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 205 * in some queue. 206 * 207 * XXX: Locking? 208 */ 209 cs->cs_timeout = 0; 210 211 /* 212 * Data-Out PDUs don't contain CmdSN. 213 */ 214 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 215 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 216 return (false); 217 218 /* 219 * We're only using fields common for all the request 220 * (initiator -> target) PDUs. 221 */ 222 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 223 cmdsn = ntohl(bhssc->bhssc_cmdsn); 224 expstatsn = ntohl(bhssc->bhssc_expstatsn); 225 226 CFISCSI_SESSION_LOCK(cs); 227#if 0 228 if (expstatsn != cs->cs_statsn) { 229 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 230 "while current StatSN is %d", expstatsn, 231 cs->cs_statsn); 232 } 233#endif 234 235 /* 236 * The target MUST silently ignore any non-immediate command outside 237 * of this range. 238 */ 239 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 240 CFISCSI_SESSION_UNLOCK(cs); 241 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 242 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 243 return (true); 244 } 245 246 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 247 cs->cs_cmdsn++; 248 249 CFISCSI_SESSION_UNLOCK(cs); 250 251 return (false); 252} 253 254static void 255cfiscsi_pdu_handle(struct icl_pdu *request) 256{ 257 struct cfiscsi_session *cs; 258 bool ignore; 259 260 cs = PDU_SESSION(request); 261 262 ignore = cfiscsi_pdu_update_cmdsn(request); 263 if (ignore) { 264 icl_pdu_free(request); 265 return; 266 } 267 268 /* 269 * Handle the PDU; this includes e.g. receiving the remaining 270 * part of PDU and submitting the SCSI command to CTL 271 * or queueing a reply. The handling routine is responsible 272 * for freeing the PDU when it's no longer needed. 273 */ 274 switch (request->ip_bhs->bhs_opcode & 275 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 276 case ISCSI_BHS_OPCODE_NOP_OUT: 277 cfiscsi_pdu_handle_nop_out(request); 278 break; 279 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 280 cfiscsi_pdu_handle_scsi_command(request); 281 break; 282 case ISCSI_BHS_OPCODE_TASK_REQUEST: 283 cfiscsi_pdu_handle_task_request(request); 284 break; 285 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 286 cfiscsi_pdu_handle_data_out(request); 287 break; 288 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 289 cfiscsi_pdu_handle_logout_request(request); 290 break; 291 default: 292 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 293 "opcode 0x%x; dropping connection", 294 request->ip_bhs->bhs_opcode); 295 icl_pdu_free(request); 296 cfiscsi_session_terminate(cs); 297 } 298 299} 300 301static void 302cfiscsi_receive_callback(struct icl_pdu *request) 303{ 304 struct cfiscsi_session *cs; 305 306 cs = PDU_SESSION(request); 307 308#ifdef ICL_KERNEL_PROXY 309 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 310 if (cs->cs_login_pdu == NULL) 311 cs->cs_login_pdu = request; 312 else 313 icl_pdu_free(request); 314 cv_signal(&cs->cs_login_cv); 315 return; 316 } 317#endif 318 319 cfiscsi_pdu_handle(request); 320} 321 322static void 323cfiscsi_error_callback(struct icl_conn *ic) 324{ 325 struct cfiscsi_session *cs; 326 327 cs = CONN_SESSION(ic); 328 329 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 330 cfiscsi_session_terminate(cs); 331} 332 333static int 334cfiscsi_pdu_prepare(struct icl_pdu *response) 335{ 336 struct cfiscsi_session *cs; 337 struct iscsi_bhs_scsi_response *bhssr; 338 bool advance_statsn = true; 339 340 cs = PDU_SESSION(response); 341 342 CFISCSI_SESSION_LOCK_ASSERT(cs); 343 344 /* 345 * We're only using fields common for all the response 346 * (target -> initiator) PDUs. 347 */ 348 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 349 350 /* 351 * 10.8.3: "The StatSN for this connection is not advanced 352 * after this PDU is sent." 353 */ 354 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 355 advance_statsn = false; 356 357 /* 358 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 359 * StatSN for the connection is not advanced after this PDU is sent." 360 */ 361 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 362 bhssr->bhssr_initiator_task_tag == 0xffffffff) 363 advance_statsn = false; 364 365 /* 366 * See the comment below - StatSN is not meaningful and must 367 * not be advanced. 368 */ 369 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 370 advance_statsn = false; 371 372 /* 373 * 10.7.3: "The fields StatSN, Status, and Residual Count 374 * only have meaningful content if the S bit is set to 1." 375 */ 376 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 377 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 378 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 379 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 380 381 if (advance_statsn) 382 cs->cs_statsn++; 383 384 return (0); 385} 386 387static void 388cfiscsi_pdu_queue(struct icl_pdu *response) 389{ 390 struct cfiscsi_session *cs; 391 392 cs = PDU_SESSION(response); 393 394 CFISCSI_SESSION_LOCK(cs); 395 cfiscsi_pdu_prepare(response); 396 icl_pdu_queue(response); 397 CFISCSI_SESSION_UNLOCK(cs); 398} 399 400static uint32_t 401cfiscsi_decode_lun(uint64_t encoded) 402{ 403 uint8_t lun[8]; 404 uint32_t result; 405 406 /* 407 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 408 * but is in fact an evil, multidimensional structure defined 409 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 410 */ 411 memcpy(lun, &encoded, sizeof(lun)); 412 switch (lun[0] & 0xC0) { 413 case 0x00: 414 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 415 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 416 CFISCSI_WARN("malformed LUN " 417 "(peripheral device addressing method): 0x%jx", 418 (uintmax_t)encoded); 419 result = 0xffffffff; 420 break; 421 } 422 result = lun[1]; 423 break; 424 case 0x40: 425 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 426 lun[6] != 0 || lun[7] != 0) { 427 CFISCSI_WARN("malformed LUN " 428 "(flat address space addressing method): 0x%jx", 429 (uintmax_t)encoded); 430 result = 0xffffffff; 431 break; 432 } 433 result = ((lun[0] & 0x3f) << 8) + lun[1]; 434 break; 435 case 0xC0: 436 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 437 lun[6] != 0 || lun[7] != 0) { 438 CFISCSI_WARN("malformed LUN (extended flat " 439 "address space addressing method): 0x%jx", 440 (uintmax_t)encoded); 441 result = 0xffffffff; 442 break; 443 } 444 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 445 default: 446 CFISCSI_WARN("unsupported LUN format 0x%jx", 447 (uintmax_t)encoded); 448 result = 0xffffffff; 449 break; 450 } 451 452 return (result); 453} 454 455static void 456cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 457{ 458 struct cfiscsi_session *cs; 459 struct iscsi_bhs_nop_out *bhsno; 460 struct iscsi_bhs_nop_in *bhsni; 461 struct icl_pdu *response; 462 void *data = NULL; 463 size_t datasize; 464 int error; 465 466 cs = PDU_SESSION(request); 467 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 468 469 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 470 /* 471 * Nothing to do, iscsi_pdu_update_statsn() already 472 * zeroed the timeout. 473 */ 474 icl_pdu_free(request); 475 return; 476 } 477 478 datasize = icl_pdu_data_segment_length(request); 479 if (datasize > 0) { 480 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 481 if (data == NULL) { 482 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 483 "dropping connection"); 484 icl_pdu_free(request); 485 cfiscsi_session_terminate(cs); 486 return; 487 } 488 icl_pdu_get_data(request, 0, data, datasize); 489 } 490 491 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 492 if (response == NULL) { 493 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 494 "droppping connection"); 495 free(data, M_CFISCSI); 496 icl_pdu_free(request); 497 cfiscsi_session_terminate(cs); 498 return; 499 } 500 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 501 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 502 bhsni->bhsni_flags = 0x80; 503 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 504 bhsni->bhsni_target_transfer_tag = 0xffffffff; 505 if (datasize > 0) { 506 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 507 if (error != 0) { 508 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 509 "dropping connection"); 510 free(data, M_CFISCSI); 511 icl_pdu_free(request); 512 icl_pdu_free(response); 513 cfiscsi_session_terminate(cs); 514 return; 515 } 516 free(data, M_CFISCSI); 517 } 518 519 icl_pdu_free(request); 520 cfiscsi_pdu_queue(response); 521} 522 523static void 524cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 525{ 526 struct iscsi_bhs_scsi_command *bhssc; 527 struct cfiscsi_session *cs; 528 union ctl_io *io; 529 int error; 530 531 cs = PDU_SESSION(request); 532 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 533 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 534 // bhssc->bhssc_initiator_task_tag); 535 536 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 537 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 538 "ImmediateData=No; dropping connection"); 539 icl_pdu_free(request); 540 cfiscsi_session_terminate(cs); 541 return; 542 } 543 io = ctl_alloc_io(cs->cs_target->ct_softc->port.ctl_pool_ref); 544 if (io == NULL) { 545 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 546 "dropping connection"); 547 icl_pdu_free(request); 548 cfiscsi_session_terminate(cs); 549 return; 550 } 551 ctl_zero_io(io); 552 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 553 io->io_hdr.io_type = CTL_IO_SCSI; 554 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 555 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->port.targ_port; 556 io->io_hdr.nexus.targ_target.id = 0; 557 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 558 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 559 io->io_hdr.nexus.lun_map_arg = cs; 560 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 561 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 562 case BHSSC_FLAGS_ATTR_UNTAGGED: 563 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 564 break; 565 case BHSSC_FLAGS_ATTR_SIMPLE: 566 io->scsiio.tag_type = CTL_TAG_SIMPLE; 567 break; 568 case BHSSC_FLAGS_ATTR_ORDERED: 569 io->scsiio.tag_type = CTL_TAG_ORDERED; 570 break; 571 case BHSSC_FLAGS_ATTR_HOQ: 572 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 573 break; 574 case BHSSC_FLAGS_ATTR_ACA: 575 io->scsiio.tag_type = CTL_TAG_ACA; 576 break; 577 default: 578 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 579 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 580 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 581 break; 582 } 583 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 584 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 585 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 586 error = ctl_queue(io); 587 if (error != CTL_RETVAL_COMPLETE) { 588 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 589 "dropping connection", error); 590 ctl_free_io(io); 591 refcount_release(&cs->cs_outstanding_ctl_pdus); 592 icl_pdu_free(request); 593 cfiscsi_session_terminate(cs); 594 } 595} 596 597static void 598cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 599{ 600 struct iscsi_bhs_task_management_request *bhstmr; 601 struct iscsi_bhs_task_management_response *bhstmr2; 602 struct icl_pdu *response; 603 struct cfiscsi_session *cs; 604 union ctl_io *io; 605 int error; 606 607 cs = PDU_SESSION(request); 608 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 609 io = ctl_alloc_io(cs->cs_target->ct_softc->port.ctl_pool_ref); 610 if (io == NULL) { 611 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 612 "dropping connection"); 613 icl_pdu_free(request); 614 cfiscsi_session_terminate(cs); 615 return; 616 } 617 ctl_zero_io(io); 618 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 619 io->io_hdr.io_type = CTL_IO_TASK; 620 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 621 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->port.targ_port; 622 io->io_hdr.nexus.targ_target.id = 0; 623 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 624 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 625 io->io_hdr.nexus.lun_map_arg = cs; 626 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 627 628 switch (bhstmr->bhstmr_function & ~0x80) { 629 case BHSTMR_FUNCTION_ABORT_TASK: 630#if 0 631 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 632#endif 633 io->taskio.task_action = CTL_TASK_ABORT_TASK; 634 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 635 break; 636 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 637#if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 639#endif 640 io->taskio.task_action = CTL_TASK_LUN_RESET; 641 break; 642 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 643#if 0 644 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 645#endif 646 io->taskio.task_action = CTL_TASK_TARGET_RESET; 647 break; 648 default: 649 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 650 bhstmr->bhstmr_function & ~0x80); 651 ctl_free_io(io); 652 653 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 654 if (response == NULL) { 655 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 656 "dropping connection"); 657 icl_pdu_free(request); 658 cfiscsi_session_terminate(cs); 659 return; 660 } 661 bhstmr2 = (struct iscsi_bhs_task_management_response *) 662 response->ip_bhs; 663 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 664 bhstmr2->bhstmr_flags = 0x80; 665 bhstmr2->bhstmr_response = 666 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 667 bhstmr2->bhstmr_initiator_task_tag = 668 bhstmr->bhstmr_initiator_task_tag; 669 icl_pdu_free(request); 670 cfiscsi_pdu_queue(response); 671 return; 672 } 673 674 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 675 error = ctl_queue(io); 676 if (error != CTL_RETVAL_COMPLETE) { 677 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 678 "dropping connection", error); 679 ctl_free_io(io); 680 refcount_release(&cs->cs_outstanding_ctl_pdus); 681 icl_pdu_free(request); 682 cfiscsi_session_terminate(cs); 683 } 684} 685 686static bool 687cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 688{ 689 struct iscsi_bhs_data_out *bhsdo; 690 struct cfiscsi_session *cs; 691 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 692 size_t copy_len, len, off, buffer_offset; 693 int ctl_sg_count; 694 union ctl_io *io; 695 696 cs = PDU_SESSION(request); 697 698 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 699 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 700 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 701 ISCSI_BHS_OPCODE_SCSI_COMMAND, 702 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 703 704 /* 705 * We're only using fields common for Data-Out and SCSI Command PDUs. 706 */ 707 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 708 709 io = cdw->cdw_ctl_io; 710 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 711 ("CTL_FLAG_DATA_IN")); 712 713#if 0 714 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 715 request->ip_data_len, io->scsiio.kern_total_len); 716#endif 717 718 if (io->scsiio.kern_sg_entries > 0) { 719 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 720 ctl_sg_count = io->scsiio.kern_sg_entries; 721 } else { 722 ctl_sglist = &ctl_sg_entry; 723 ctl_sglist->addr = io->scsiio.kern_data_ptr; 724 ctl_sglist->len = io->scsiio.kern_data_len; 725 ctl_sg_count = 1; 726 } 727 728 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 729 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 730 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 731 else 732 buffer_offset = 0; 733 len = icl_pdu_data_segment_length(request); 734 735 /* 736 * Make sure the offset, as sent by the initiator, matches the offset 737 * we're supposed to be at in the scatter-gather list. 738 */ 739 if (buffer_offset > 740 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 741 buffer_offset + len <= 742 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 743 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 744 "expected %zd; dropping connection", buffer_offset, 745 (size_t)io->scsiio.kern_rel_offset + 746 (size_t)io->scsiio.ext_data_filled); 747 ctl_set_data_phase_error(&io->scsiio); 748 cfiscsi_session_terminate(cs); 749 return (true); 750 } 751 752 /* 753 * This is the offset within the PDU data segment, as opposed 754 * to buffer_offset, which is the offset within the task (SCSI 755 * command). 756 */ 757 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 758 buffer_offset; 759 760 /* 761 * Iterate over the scatter/gather segments, filling them with data 762 * from the PDU data segment. Note that this can get called multiple 763 * times for one SCSI command; the cdw structure holds state for the 764 * scatter/gather list. 765 */ 766 for (;;) { 767 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 768 ("cdw->cdw_sg_index >= ctl_sg_count")); 769 if (cdw->cdw_sg_len == 0) { 770 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 771 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 772 } 773 KASSERT(off <= len, ("len > off")); 774 copy_len = len - off; 775 if (copy_len > cdw->cdw_sg_len) 776 copy_len = cdw->cdw_sg_len; 777 778 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 779 cdw->cdw_sg_addr += copy_len; 780 cdw->cdw_sg_len -= copy_len; 781 off += copy_len; 782 io->scsiio.ext_data_filled += copy_len; 783 784 if (cdw->cdw_sg_len == 0) { 785 /* 786 * End of current segment. 787 */ 788 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 789 /* 790 * Last segment in scatter/gather list. 791 */ 792 break; 793 } 794 cdw->cdw_sg_index++; 795 } 796 797 if (off == len) { 798 /* 799 * End of PDU payload. 800 */ 801 break; 802 } 803 } 804 805 if (len > off) { 806 /* 807 * In case of unsolicited data, it's possible that the buffer 808 * provided by CTL is smaller than negotiated FirstBurstLength. 809 * Just ignore the superfluous data; will ask for them with R2T 810 * on next call to cfiscsi_datamove(). 811 * 812 * This obviously can only happen with SCSI Command PDU. 813 */ 814 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 815 ISCSI_BHS_OPCODE_SCSI_COMMAND) 816 return (true); 817 818 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 819 "expected %zd; dropping connection", 820 icl_pdu_data_segment_length(request), off); 821 ctl_set_data_phase_error(&io->scsiio); 822 cfiscsi_session_terminate(cs); 823 return (true); 824 } 825 826 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len && 827 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 828 CFISCSI_SESSION_WARN(cs, "got the final packet without " 829 "the F flag; flags = 0x%x; dropping connection", 830 bhsdo->bhsdo_flags); 831 ctl_set_data_phase_error(&io->scsiio); 832 cfiscsi_session_terminate(cs); 833 return (true); 834 } 835 836 if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len && 837 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 838 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 839 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 840 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 841 "transmitted size was %zd bytes instead of %d; " 842 "dropping connection", 843 (size_t)io->scsiio.ext_data_filled, 844 io->scsiio.kern_data_len); 845 ctl_set_data_phase_error(&io->scsiio); 846 cfiscsi_session_terminate(cs); 847 return (true); 848 } else { 849 /* 850 * For SCSI Command PDU, this just means we need to 851 * solicit more data by sending R2T. 852 */ 853 return (false); 854 } 855 } 856 857 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) { 858#if 0 859 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 860 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 861#endif 862 863 return (true); 864 } 865 866 return (false); 867} 868 869static void 870cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 871{ 872 struct iscsi_bhs_data_out *bhsdo; 873 struct cfiscsi_session *cs; 874 struct cfiscsi_data_wait *cdw = NULL; 875 union ctl_io *io; 876 bool done; 877 878 cs = PDU_SESSION(request); 879 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 880 881 CFISCSI_SESSION_LOCK(cs); 882 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 883#if 0 884 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 885 "ttt 0x%x, itt 0x%x", 886 bhsdo->bhsdo_target_transfer_tag, 887 bhsdo->bhsdo_initiator_task_tag, 888 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 889#endif 890 if (bhsdo->bhsdo_target_transfer_tag == 891 cdw->cdw_target_transfer_tag) 892 break; 893 } 894 CFISCSI_SESSION_UNLOCK(cs); 895 if (cdw == NULL) { 896 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 897 "0x%x, not found; dropping connection", 898 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 899 icl_pdu_free(request); 900 cfiscsi_session_terminate(cs); 901 return; 902 } 903 904 io = cdw->cdw_ctl_io; 905 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 906 ("CTL_FLAG_DATA_IN")); 907 908 done = cfiscsi_handle_data_segment(request, cdw); 909 if (done) { 910 CFISCSI_SESSION_LOCK(cs); 911 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 912 CFISCSI_SESSION_UNLOCK(cs); 913 uma_zfree(cfiscsi_data_wait_zone, cdw); 914 io->scsiio.be_move_done(io); 915 } 916 917 icl_pdu_free(request); 918} 919 920static void 921cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 922{ 923 struct iscsi_bhs_logout_request *bhslr; 924 struct iscsi_bhs_logout_response *bhslr2; 925 struct icl_pdu *response; 926 struct cfiscsi_session *cs; 927 928 cs = PDU_SESSION(request); 929 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 930 switch (bhslr->bhslr_reason & 0x7f) { 931 case BHSLR_REASON_CLOSE_SESSION: 932 case BHSLR_REASON_CLOSE_CONNECTION: 933 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 934 if (response == NULL) { 935 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 936 icl_pdu_free(request); 937 cfiscsi_session_terminate(cs); 938 return; 939 } 940 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 941 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 942 bhslr2->bhslr_flags = 0x80; 943 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 944 bhslr2->bhslr_initiator_task_tag = 945 bhslr->bhslr_initiator_task_tag; 946 icl_pdu_free(request); 947 cfiscsi_pdu_queue(response); 948 cfiscsi_session_terminate(cs); 949 break; 950 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 951 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 952 if (response == NULL) { 953 CFISCSI_SESSION_WARN(cs, 954 "failed to allocate memory; dropping connection"); 955 icl_pdu_free(request); 956 cfiscsi_session_terminate(cs); 957 return; 958 } 959 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 960 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 961 bhslr2->bhslr_flags = 0x80; 962 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 963 bhslr2->bhslr_initiator_task_tag = 964 bhslr->bhslr_initiator_task_tag; 965 icl_pdu_free(request); 966 cfiscsi_pdu_queue(response); 967 break; 968 default: 969 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 970 bhslr->bhslr_reason); 971 icl_pdu_free(request); 972 cfiscsi_session_terminate(cs); 973 break; 974 } 975} 976 977static void 978cfiscsi_callout(void *context) 979{ 980 struct icl_pdu *cp; 981 struct iscsi_bhs_nop_in *bhsni; 982 struct cfiscsi_session *cs; 983 984 cs = context; 985 986 if (cs->cs_terminating) 987 return; 988 989 callout_schedule(&cs->cs_callout, 1 * hz); 990 991 atomic_add_int(&cs->cs_timeout, 1); 992 993#ifdef ICL_KERNEL_PROXY 994 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 995 if (cs->cs_timeout > login_timeout) { 996 CFISCSI_SESSION_WARN(cs, "login timed out after " 997 "%d seconds; dropping connection", cs->cs_timeout); 998 cfiscsi_session_terminate(cs); 999 } 1000 return; 1001 } 1002#endif 1003 1004 if (cs->cs_timeout >= ping_timeout) { 1005 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1006 "dropping connection", ping_timeout); 1007 cfiscsi_session_terminate(cs); 1008 return; 1009 } 1010 1011 /* 1012 * If the ping was reset less than one second ago - which means 1013 * that we've received some PDU during the last second - assume 1014 * the traffic flows correctly and don't bother sending a NOP-Out. 1015 * 1016 * (It's 2 - one for one second, and one for incrementing is_timeout 1017 * earlier in this routine.) 1018 */ 1019 if (cs->cs_timeout < 2) 1020 return; 1021 1022 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1023 if (cp == NULL) { 1024 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1025 return; 1026 } 1027 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1028 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1029 bhsni->bhsni_flags = 0x80; 1030 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1031 1032 cfiscsi_pdu_queue(cp); 1033} 1034 1035static void 1036cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1037{ 1038 struct cfiscsi_data_wait *cdw, *tmpcdw; 1039 union ctl_io *io; 1040 int error, last; 1041 1042#ifdef notyet 1043 io = ctl_alloc_io(cs->cs_target->ct_softc->port.ctl_pool_ref); 1044 if (io == NULL) { 1045 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1046 return; 1047 } 1048 ctl_zero_io(io); 1049 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1050 io->io_hdr.io_type = CTL_IO_TASK; 1051 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1052 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->port.targ_port; 1053 io->io_hdr.nexus.targ_target.id = 0; 1054 io->io_hdr.nexus.targ_lun = lun; 1055 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1056 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1057 error = ctl_queue(io); 1058 if (error != CTL_RETVAL_COMPLETE) { 1059 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1060 ctl_free_io(io); 1061 } 1062#else 1063 /* 1064 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1065 * just iterate over tasks that are waiting for something - data - and 1066 * terminate those. 1067 */ 1068 CFISCSI_SESSION_LOCK(cs); 1069 TAILQ_FOREACH_SAFE(cdw, 1070 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1071 io = ctl_alloc_io(cs->cs_target->ct_softc->port.ctl_pool_ref); 1072 if (io == NULL) { 1073 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1074 return; 1075 } 1076 ctl_zero_io(io); 1077 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1078 io->io_hdr.io_type = CTL_IO_TASK; 1079 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1080 io->io_hdr.nexus.targ_port = 1081 cs->cs_target->ct_softc->port.targ_port; 1082 io->io_hdr.nexus.targ_target.id = 0; 1083 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1084 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1085 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1086 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1087 error = ctl_queue(io); 1088 if (error != CTL_RETVAL_COMPLETE) { 1089 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1090 ctl_free_io(io); 1091 return; 1092 } 1093#if 0 1094 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1095 "0x%x", cdw->cdw_initiator_task_tag); 1096#endif 1097 /* 1098 * Set nonzero port status; this prevents backends from 1099 * assuming that the data transfer actually succeeded 1100 * and writing uninitialized data to disk. 1101 */ 1102 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1103 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1104 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1105 uma_zfree(cfiscsi_data_wait_zone, cdw); 1106 } 1107 CFISCSI_SESSION_UNLOCK(cs); 1108#endif 1109 1110 /* 1111 * Wait for CTL to terminate all the tasks. 1112 */ 1113 for (;;) { 1114 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1115 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1116 if (last != 0) 1117 break; 1118 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, " 1119 "%d remaining", cs->cs_outstanding_ctl_pdus); 1120 pause("cfiscsi_terminate", 1); 1121 } 1122} 1123 1124static void 1125cfiscsi_maintenance_thread(void *arg) 1126{ 1127 struct cfiscsi_session *cs; 1128 1129 cs = arg; 1130 1131 for (;;) { 1132 CFISCSI_SESSION_LOCK(cs); 1133 if (cs->cs_terminating == false) 1134 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1135 CFISCSI_SESSION_UNLOCK(cs); 1136 1137 if (cs->cs_terminating) { 1138 1139 /* 1140 * We used to wait up to 30 seconds to deliver queued 1141 * PDUs to the initiator. We also tried hard to deliver 1142 * SCSI Responses for the aborted PDUs. We don't do 1143 * that anymore. We might need to revisit that. 1144 */ 1145 callout_drain(&cs->cs_callout); 1146 icl_conn_shutdown(cs->cs_conn); 1147 icl_conn_close(cs->cs_conn); 1148 1149 /* 1150 * At this point ICL receive thread is no longer 1151 * running; no new tasks can be queued. 1152 */ 1153 cfiscsi_session_terminate_tasks(cs); 1154 cfiscsi_session_delete(cs); 1155 kthread_exit(); 1156 return; 1157 } 1158 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1159 } 1160} 1161 1162static void 1163cfiscsi_session_terminate(struct cfiscsi_session *cs) 1164{ 1165 1166 if (cs->cs_terminating) 1167 return; 1168 cs->cs_terminating = true; 1169 cv_signal(&cs->cs_maintenance_cv); 1170#ifdef ICL_KERNEL_PROXY 1171 cv_signal(&cs->cs_login_cv); 1172#endif 1173} 1174 1175static int 1176cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1177{ 1178 int error, i; 1179 struct cfiscsi_softc *softc; 1180 1181 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1182 1183 softc = &cfiscsi_softc; 1184 1185 mtx_lock(&softc->lock); 1186 for (i = 0; i < softc->max_initiators; i++) { 1187 if (softc->ctl_initids[i] == 0) 1188 break; 1189 } 1190 if (i == softc->max_initiators) { 1191 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1192 softc->max_initiators); 1193 mtx_unlock(&softc->lock); 1194 return (1); 1195 } 1196 softc->ctl_initids[i] = 1; 1197 mtx_unlock(&softc->lock); 1198 1199#if 0 1200 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1201 i, softc->max_initiators); 1202#endif 1203 cs->cs_ctl_initid = i; 1204 error = ctl_add_initiator(0x0, softc->port.targ_port, cs->cs_ctl_initid); 1205 if (error != 0) { 1206 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1207 mtx_lock(&softc->lock); 1208 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1209 mtx_unlock(&softc->lock); 1210 cs->cs_ctl_initid = -1; 1211 return (1); 1212 } 1213 1214 return (0); 1215} 1216 1217static void 1218cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1219{ 1220 int error; 1221 struct cfiscsi_softc *softc; 1222 1223 if (cs->cs_ctl_initid == -1) 1224 return; 1225 1226 softc = &cfiscsi_softc; 1227 1228 error = ctl_remove_initiator(softc->port.targ_port, cs->cs_ctl_initid); 1229 if (error != 0) { 1230 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1231 error); 1232 } 1233 mtx_lock(&softc->lock); 1234 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1235 mtx_unlock(&softc->lock); 1236 cs->cs_ctl_initid = -1; 1237} 1238 1239static struct cfiscsi_session * 1240cfiscsi_session_new(struct cfiscsi_softc *softc) 1241{ 1242 struct cfiscsi_session *cs; 1243 int error; 1244 1245 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1246 if (cs == NULL) { 1247 CFISCSI_WARN("malloc failed"); 1248 return (NULL); 1249 } 1250 cs->cs_ctl_initid = -1; 1251 1252 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1253 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1254 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1255 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1256#ifdef ICL_KERNEL_PROXY 1257 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1258#endif 1259 1260 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1261 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1262 cs->cs_conn->ic_error = cfiscsi_error_callback; 1263 cs->cs_conn->ic_prv0 = cs; 1264 1265 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1266 if (error != 0) { 1267 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1268 free(cs, M_CFISCSI); 1269 return (NULL); 1270 } 1271 1272 mtx_lock(&softc->lock); 1273 cs->cs_id = softc->last_session_id + 1; 1274 softc->last_session_id++; 1275 mtx_unlock(&softc->lock); 1276 1277 mtx_lock(&softc->lock); 1278 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1279 mtx_unlock(&softc->lock); 1280 1281 /* 1282 * Start pinging the initiator. 1283 */ 1284 callout_init(&cs->cs_callout, 1); 1285 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1286 1287 return (cs); 1288} 1289 1290static void 1291cfiscsi_session_delete(struct cfiscsi_session *cs) 1292{ 1293 struct cfiscsi_softc *softc; 1294 1295 softc = &cfiscsi_softc; 1296 1297 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1298 ("destroying session with outstanding CTL pdus")); 1299 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1300 ("destroying session with non-empty queue")); 1301 1302 cfiscsi_session_unregister_initiator(cs); 1303 if (cs->cs_target != NULL) 1304 cfiscsi_target_release(cs->cs_target); 1305 icl_conn_close(cs->cs_conn); 1306 icl_conn_free(cs->cs_conn); 1307 1308 mtx_lock(&softc->lock); 1309 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1310 mtx_unlock(&softc->lock); 1311 1312 free(cs, M_CFISCSI); 1313} 1314 1315int 1316cfiscsi_init(void) 1317{ 1318 struct cfiscsi_softc *softc; 1319 struct ctl_port *port; 1320 int retval; 1321 1322 softc = &cfiscsi_softc; 1323 retval = 0; 1324 bzero(softc, sizeof(*softc)); 1325 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1326 1327#ifdef ICL_KERNEL_PROXY 1328 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1329#endif 1330 TAILQ_INIT(&softc->sessions); 1331 TAILQ_INIT(&softc->targets); 1332 1333 port = &softc->port; 1334 port->frontend = &cfiscsi_frontend; 1335 port->port_type = CTL_PORT_ISCSI; 1336 /* XXX KDM what should the real number be here? */ 1337 port->num_requested_ctl_io = 4096; 1338 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1339 port->port_name = softc->port_name; 1340 port->port_online = cfiscsi_online; 1341 port->port_offline = cfiscsi_offline; 1342 port->onoff_arg = softc; 1343 port->lun_enable = cfiscsi_lun_enable; 1344 port->lun_disable = cfiscsi_lun_disable; 1345 port->targ_lun_arg = softc; 1346 port->devid = cfiscsi_devid; 1347 port->fe_datamove = cfiscsi_datamove; 1348 port->fe_done = cfiscsi_done; 1349 1350 /* XXX KDM what should we report here? */ 1351 /* XXX These should probably be fetched from CTL. */ 1352 port->max_targets = 1; 1353 port->max_target_id = 15; 1354 1355 retval = ctl_port_register(port, /*master_SC*/ 1); 1356 if (retval != 0) { 1357 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1358 retval); 1359 retval = 1; 1360 goto bailout; 1361 } 1362 1363 softc->max_initiators = port->max_initiators; 1364 1365 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1366 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1367 UMA_ALIGN_PTR, 0); 1368 1369 return (0); 1370 1371bailout: 1372 return (retval); 1373} 1374 1375#ifdef ICL_KERNEL_PROXY 1376static void 1377cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1378{ 1379 struct cfiscsi_session *cs; 1380 1381 cs = cfiscsi_session_new(&cfiscsi_softc); 1382 if (cs == NULL) { 1383 CFISCSI_WARN("failed to create session"); 1384 return; 1385 } 1386 1387 icl_conn_handoff_sock(cs->cs_conn, so); 1388 cs->cs_initiator_sa = sa; 1389 cs->cs_portal_id = portal_id; 1390 cs->cs_waiting_for_ctld = true; 1391 cv_signal(&cfiscsi_softc.accept_cv); 1392} 1393#endif 1394 1395static void 1396cfiscsi_online(void *arg) 1397{ 1398 struct cfiscsi_softc *softc; 1399 1400 softc = (struct cfiscsi_softc *)arg; 1401 1402 softc->online = 1; 1403#ifdef ICL_KERNEL_PROXY 1404 if (softc->listener != NULL) 1405 icl_listen_free(softc->listener); 1406 softc->listener = icl_listen_new(cfiscsi_accept); 1407#endif 1408} 1409 1410static void 1411cfiscsi_offline(void *arg) 1412{ 1413 struct cfiscsi_softc *softc; 1414 struct cfiscsi_session *cs; 1415 1416 softc = (struct cfiscsi_softc *)arg; 1417 1418 softc->online = 0; 1419 1420 mtx_lock(&softc->lock); 1421 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1422 cfiscsi_session_terminate(cs); 1423 mtx_unlock(&softc->lock); 1424 1425#ifdef ICL_KERNEL_PROXY 1426 icl_listen_free(softc->listener); 1427 softc->listener = NULL; 1428#endif 1429} 1430 1431static void 1432cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1433{ 1434 struct cfiscsi_softc *softc; 1435 struct cfiscsi_session *cs; 1436 struct cfiscsi_target *ct; 1437 struct ctl_iscsi_handoff_params *cihp; 1438 int error; 1439 1440 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1441 softc = &cfiscsi_softc; 1442 1443 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1444 cihp->initiator_name, cihp->initiator_addr, 1445 cihp->target_name); 1446 1447 if (softc->online == 0) { 1448 ci->status = CTL_ISCSI_ERROR; 1449 snprintf(ci->error_str, sizeof(ci->error_str), 1450 "%s: port offline", __func__); 1451 return; 1452 } 1453 1454 ct = cfiscsi_target_find(softc, cihp->target_name); 1455 if (ct == NULL) { 1456 ci->status = CTL_ISCSI_ERROR; 1457 snprintf(ci->error_str, sizeof(ci->error_str), 1458 "%s: target not found", __func__); 1459 return; 1460 } 1461 1462#ifdef ICL_KERNEL_PROXY 1463 if (cihp->socket > 0 && cihp->connection_id > 0) { 1464 snprintf(ci->error_str, sizeof(ci->error_str), 1465 "both socket and connection_id set"); 1466 ci->status = CTL_ISCSI_ERROR; 1467 cfiscsi_target_release(ct); 1468 return; 1469 } 1470 if (cihp->socket == 0) { 1471 mtx_lock(&cfiscsi_softc.lock); 1472 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1473 if (cs->cs_id == cihp->socket) 1474 break; 1475 } 1476 if (cs == NULL) { 1477 mtx_unlock(&cfiscsi_softc.lock); 1478 snprintf(ci->error_str, sizeof(ci->error_str), 1479 "connection not found"); 1480 ci->status = CTL_ISCSI_ERROR; 1481 cfiscsi_target_release(ct); 1482 return; 1483 } 1484 mtx_unlock(&cfiscsi_softc.lock); 1485 } else { 1486#endif 1487 cs = cfiscsi_session_new(softc); 1488 if (cs == NULL) { 1489 ci->status = CTL_ISCSI_ERROR; 1490 snprintf(ci->error_str, sizeof(ci->error_str), 1491 "%s: cfiscsi_session_new failed", __func__); 1492 cfiscsi_target_release(ct); 1493 return; 1494 } 1495#ifdef ICL_KERNEL_PROXY 1496 } 1497#endif 1498 cs->cs_target = ct; 1499 1500 /* 1501 * First PDU of Full Feature phase has the same CmdSN as the last 1502 * PDU from the Login Phase received from the initiator. Thus, 1503 * the -1 below. 1504 */ 1505 cs->cs_portal_group_tag = cihp->portal_group_tag; 1506 cs->cs_cmdsn = cihp->cmdsn; 1507 cs->cs_statsn = cihp->statsn; 1508 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1509 cs->cs_max_burst_length = cihp->max_burst_length; 1510 cs->cs_immediate_data = !!cihp->immediate_data; 1511 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1512 cs->cs_conn->ic_header_crc32c = true; 1513 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1514 cs->cs_conn->ic_data_crc32c = true; 1515 1516 strlcpy(cs->cs_initiator_name, 1517 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1518 strlcpy(cs->cs_initiator_addr, 1519 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1520 strlcpy(cs->cs_initiator_alias, 1521 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1522 1523#ifdef ICL_KERNEL_PROXY 1524 if (cihp->socket > 0) { 1525#endif 1526 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1527 if (error != 0) { 1528 cfiscsi_session_delete(cs); 1529 ci->status = CTL_ISCSI_ERROR; 1530 snprintf(ci->error_str, sizeof(ci->error_str), 1531 "%s: icl_conn_handoff failed with error %d", 1532 __func__, error); 1533 return; 1534 } 1535#ifdef ICL_KERNEL_PROXY 1536 } 1537#endif 1538 1539 /* 1540 * Register initiator with CTL. 1541 */ 1542 cfiscsi_session_register_initiator(cs); 1543 1544#ifdef ICL_KERNEL_PROXY 1545 cs->cs_login_phase = false; 1546 1547 /* 1548 * First PDU of the Full Feature phase has likely already arrived. 1549 * We have to pick it up and execute properly. 1550 */ 1551 if (cs->cs_login_pdu != NULL) { 1552 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1553 cfiscsi_pdu_handle(cs->cs_login_pdu); 1554 cs->cs_login_pdu = NULL; 1555 } 1556#endif 1557 1558 ci->status = CTL_ISCSI_OK; 1559} 1560 1561static void 1562cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1563{ 1564 struct ctl_iscsi_list_params *cilp; 1565 struct cfiscsi_session *cs; 1566 struct cfiscsi_softc *softc; 1567 struct sbuf *sb; 1568 int error; 1569 1570 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1571 softc = &cfiscsi_softc; 1572 1573 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1574 if (sb == NULL) { 1575 ci->status = CTL_ISCSI_ERROR; 1576 snprintf(ci->error_str, sizeof(ci->error_str), 1577 "Unable to allocate %d bytes for iSCSI session list", 1578 cilp->alloc_len); 1579 return; 1580 } 1581 1582 sbuf_printf(sb, "<ctlislist>\n"); 1583 mtx_lock(&softc->lock); 1584 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1585#ifdef ICL_KERNEL_PROXY 1586 if (cs->cs_target == NULL) 1587 continue; 1588#endif 1589 error = sbuf_printf(sb, "<connection id=\"%d\">" 1590 "<initiator>%s</initiator>" 1591 "<initiator_addr>%s</initiator_addr>" 1592 "<initiator_alias>%s</initiator_alias>" 1593 "<target>%s</target>" 1594 "<target_alias>%s</target_alias>" 1595 "<header_digest>%s</header_digest>" 1596 "<data_digest>%s</data_digest>" 1597 "<max_data_segment_length>%zd</max_data_segment_length>" 1598 "<immediate_data>%d</immediate_data>" 1599 "<iser>%d</iser>" 1600 "</connection>\n", 1601 cs->cs_id, 1602 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1603 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1604 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1605 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1606 cs->cs_max_data_segment_length, 1607 cs->cs_immediate_data, 1608 cs->cs_conn->ic_iser); 1609 if (error != 0) 1610 break; 1611 } 1612 mtx_unlock(&softc->lock); 1613 error = sbuf_printf(sb, "</ctlislist>\n"); 1614 if (error != 0) { 1615 sbuf_delete(sb); 1616 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1617 snprintf(ci->error_str, sizeof(ci->error_str), 1618 "Out of space, %d bytes is too small", cilp->alloc_len); 1619 return; 1620 } 1621 sbuf_finish(sb); 1622 1623 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1624 cilp->fill_len = sbuf_len(sb) + 1; 1625 ci->status = CTL_ISCSI_OK; 1626 sbuf_delete(sb); 1627} 1628 1629static void 1630cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1631{ 1632 struct icl_pdu *response; 1633 struct iscsi_bhs_asynchronous_message *bhsam; 1634 struct ctl_iscsi_terminate_params *citp; 1635 struct cfiscsi_session *cs; 1636 struct cfiscsi_softc *softc; 1637 int found = 0; 1638 1639 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1640 softc = &cfiscsi_softc; 1641 1642 mtx_lock(&softc->lock); 1643 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1644 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1645 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1646 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1647 continue; 1648 1649 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1650 if (response == NULL) { 1651 /* 1652 * Oh well. Just terminate the connection. 1653 */ 1654 } else { 1655 bhsam = (struct iscsi_bhs_asynchronous_message *) 1656 response->ip_bhs; 1657 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1658 bhsam->bhsam_flags = 0x80; 1659 bhsam->bhsam_0xffffffff = 0xffffffff; 1660 bhsam->bhsam_async_event = 1661 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1662 cfiscsi_pdu_queue(response); 1663 } 1664 cfiscsi_session_terminate(cs); 1665 found++; 1666 } 1667 mtx_unlock(&softc->lock); 1668 1669 if (found == 0) { 1670 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1671 snprintf(ci->error_str, sizeof(ci->error_str), 1672 "No matching connections found"); 1673 return; 1674 } 1675 1676 ci->status = CTL_ISCSI_OK; 1677} 1678 1679static void 1680cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1681{ 1682 struct icl_pdu *response; 1683 struct iscsi_bhs_asynchronous_message *bhsam; 1684 struct ctl_iscsi_logout_params *cilp; 1685 struct cfiscsi_session *cs; 1686 struct cfiscsi_softc *softc; 1687 int found = 0; 1688 1689 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1690 softc = &cfiscsi_softc; 1691 1692 mtx_lock(&softc->lock); 1693 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1694 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1695 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1696 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1697 continue; 1698 1699 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1700 if (response == NULL) { 1701 ci->status = CTL_ISCSI_ERROR; 1702 snprintf(ci->error_str, sizeof(ci->error_str), 1703 "Unable to allocate memory"); 1704 mtx_unlock(&softc->lock); 1705 return; 1706 } 1707 bhsam = 1708 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1709 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1710 bhsam->bhsam_flags = 0x80; 1711 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1712 bhsam->bhsam_parameter3 = htons(10); 1713 cfiscsi_pdu_queue(response); 1714 found++; 1715 } 1716 mtx_unlock(&softc->lock); 1717 1718 if (found == 0) { 1719 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1720 snprintf(ci->error_str, sizeof(ci->error_str), 1721 "No matching connections found"); 1722 return; 1723 } 1724 1725 ci->status = CTL_ISCSI_OK; 1726} 1727 1728#ifdef ICL_KERNEL_PROXY 1729static void 1730cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1731{ 1732 struct ctl_iscsi_listen_params *cilp; 1733 struct sockaddr *sa; 1734 int error; 1735 1736 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1737 1738 if (cfiscsi_softc.listener == NULL) { 1739 CFISCSI_DEBUG("no listener"); 1740 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1741 ci->status = CTL_ISCSI_ERROR; 1742 return; 1743 } 1744 1745 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1746 if (error != 0) { 1747 CFISCSI_DEBUG("getsockaddr, error %d", error); 1748 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1749 ci->status = CTL_ISCSI_ERROR; 1750 return; 1751 } 1752 1753 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1754 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1755 if (error != 0) { 1756 free(sa, M_SONAME); 1757 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1758 snprintf(ci->error_str, sizeof(ci->error_str), 1759 "icl_listen_add failed, error %d", error); 1760 ci->status = CTL_ISCSI_ERROR; 1761 return; 1762 } 1763 1764 ci->status = CTL_ISCSI_OK; 1765} 1766 1767static void 1768cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1769{ 1770 struct ctl_iscsi_accept_params *ciap; 1771 struct cfiscsi_session *cs; 1772 int error; 1773 1774 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1775 1776 mtx_lock(&cfiscsi_softc.lock); 1777 for (;;) { 1778 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1779 if (cs->cs_waiting_for_ctld) 1780 break; 1781 } 1782 if (cs != NULL) 1783 break; 1784 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1785 if (error != 0) { 1786 mtx_unlock(&cfiscsi_softc.lock); 1787 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1788 ci->status = CTL_ISCSI_ERROR; 1789 return; 1790 } 1791 } 1792 mtx_unlock(&cfiscsi_softc.lock); 1793 1794 cs->cs_waiting_for_ctld = false; 1795 cs->cs_login_phase = true; 1796 1797 ciap->connection_id = cs->cs_id; 1798 ciap->portal_id = cs->cs_portal_id; 1799 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1800 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1801 cs->cs_initiator_sa->sa_len); 1802 if (error != 0) { 1803 snprintf(ci->error_str, sizeof(ci->error_str), 1804 "copyout failed with error %d", error); 1805 ci->status = CTL_ISCSI_ERROR; 1806 return; 1807 } 1808 1809 ci->status = CTL_ISCSI_OK; 1810} 1811 1812static void 1813cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1814{ 1815 struct ctl_iscsi_send_params *cisp; 1816 struct cfiscsi_session *cs; 1817 struct icl_pdu *ip; 1818 size_t datalen; 1819 void *data; 1820 int error; 1821 1822 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1823 1824 mtx_lock(&cfiscsi_softc.lock); 1825 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1826 if (cs->cs_id == cisp->connection_id) 1827 break; 1828 } 1829 if (cs == NULL) { 1830 mtx_unlock(&cfiscsi_softc.lock); 1831 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1832 ci->status = CTL_ISCSI_ERROR; 1833 return; 1834 } 1835 mtx_unlock(&cfiscsi_softc.lock); 1836 1837#if 0 1838 if (cs->cs_login_phase == false) 1839 return (EBUSY); 1840#endif 1841 1842 if (cs->cs_terminating) { 1843 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1844 ci->status = CTL_ISCSI_ERROR; 1845 return; 1846 } 1847 1848 datalen = cisp->data_segment_len; 1849 /* 1850 * XXX 1851 */ 1852 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1853 if (datalen > 65535) { 1854 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1855 ci->status = CTL_ISCSI_ERROR; 1856 return; 1857 } 1858 if (datalen > 0) { 1859 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1860 error = copyin(cisp->data_segment, data, datalen); 1861 if (error != 0) { 1862 free(data, M_CFISCSI); 1863 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1864 ci->status = CTL_ISCSI_ERROR; 1865 return; 1866 } 1867 } 1868 1869 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1870 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1871 if (datalen > 0) { 1872 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1873 free(data, M_CFISCSI); 1874 } 1875 CFISCSI_SESSION_LOCK(cs); 1876 icl_pdu_queue(ip); 1877 CFISCSI_SESSION_UNLOCK(cs); 1878 ci->status = CTL_ISCSI_OK; 1879} 1880 1881static void 1882cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1883{ 1884 struct ctl_iscsi_receive_params *cirp; 1885 struct cfiscsi_session *cs; 1886 struct icl_pdu *ip; 1887 void *data; 1888 int error; 1889 1890 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1891 1892 mtx_lock(&cfiscsi_softc.lock); 1893 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1894 if (cs->cs_id == cirp->connection_id) 1895 break; 1896 } 1897 if (cs == NULL) { 1898 mtx_unlock(&cfiscsi_softc.lock); 1899 snprintf(ci->error_str, sizeof(ci->error_str), 1900 "connection not found"); 1901 ci->status = CTL_ISCSI_ERROR; 1902 return; 1903 } 1904 mtx_unlock(&cfiscsi_softc.lock); 1905 1906#if 0 1907 if (is->is_login_phase == false) 1908 return (EBUSY); 1909#endif 1910 1911 CFISCSI_SESSION_LOCK(cs); 1912 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1913 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1914 if (error != 0) { 1915 CFISCSI_SESSION_UNLOCK(cs); 1916 snprintf(ci->error_str, sizeof(ci->error_str), 1917 "interrupted by signal"); 1918 ci->status = CTL_ISCSI_ERROR; 1919 return; 1920 } 1921 } 1922 1923 if (cs->cs_terminating) { 1924 CFISCSI_SESSION_UNLOCK(cs); 1925 snprintf(ci->error_str, sizeof(ci->error_str), 1926 "connection terminating"); 1927 ci->status = CTL_ISCSI_ERROR; 1928 return; 1929 } 1930 ip = cs->cs_login_pdu; 1931 cs->cs_login_pdu = NULL; 1932 CFISCSI_SESSION_UNLOCK(cs); 1933 1934 if (ip->ip_data_len > cirp->data_segment_len) { 1935 icl_pdu_free(ip); 1936 snprintf(ci->error_str, sizeof(ci->error_str), 1937 "data segment too big"); 1938 ci->status = CTL_ISCSI_ERROR; 1939 return; 1940 } 1941 1942 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1943 if (ip->ip_data_len > 0) { 1944 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1945 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1946 copyout(data, cirp->data_segment, ip->ip_data_len); 1947 free(data, M_CFISCSI); 1948 } 1949 1950 icl_pdu_free(ip); 1951 ci->status = CTL_ISCSI_OK; 1952} 1953 1954#endif /* !ICL_KERNEL_PROXY */ 1955 1956static int 1957cfiscsi_ioctl(struct cdev *dev, 1958 u_long cmd, caddr_t addr, int flag, struct thread *td) 1959{ 1960 struct ctl_iscsi *ci; 1961 1962 if (cmd != CTL_ISCSI) 1963 return (ENOTTY); 1964 1965 ci = (struct ctl_iscsi *)addr; 1966 switch (ci->type) { 1967 case CTL_ISCSI_HANDOFF: 1968 cfiscsi_ioctl_handoff(ci); 1969 break; 1970 case CTL_ISCSI_LIST: 1971 cfiscsi_ioctl_list(ci); 1972 break; 1973 case CTL_ISCSI_TERMINATE: 1974 cfiscsi_ioctl_terminate(ci); 1975 break; 1976 case CTL_ISCSI_LOGOUT: 1977 cfiscsi_ioctl_logout(ci); 1978 break; 1979#ifdef ICL_KERNEL_PROXY 1980 case CTL_ISCSI_LISTEN: 1981 cfiscsi_ioctl_listen(ci); 1982 break; 1983 case CTL_ISCSI_ACCEPT: 1984 cfiscsi_ioctl_accept(ci); 1985 break; 1986 case CTL_ISCSI_SEND: 1987 cfiscsi_ioctl_send(ci); 1988 break; 1989 case CTL_ISCSI_RECEIVE: 1990 cfiscsi_ioctl_receive(ci); 1991 break; 1992#else 1993 case CTL_ISCSI_LISTEN: 1994 case CTL_ISCSI_ACCEPT: 1995 case CTL_ISCSI_SEND: 1996 case CTL_ISCSI_RECEIVE: 1997 ci->status = CTL_ISCSI_ERROR; 1998 snprintf(ci->error_str, sizeof(ci->error_str), 1999 "%s: CTL compiled without ICL_KERNEL_PROXY", 2000 __func__); 2001 break; 2002#endif /* !ICL_KERNEL_PROXY */ 2003 default: 2004 ci->status = CTL_ISCSI_ERROR; 2005 snprintf(ci->error_str, sizeof(ci->error_str), 2006 "%s: invalid iSCSI request type %d", __func__, ci->type); 2007 break; 2008 } 2009 2010 return (0); 2011} 2012 2013static int 2014cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 2015{ 2016 struct cfiscsi_session *cs; 2017 struct scsi_vpd_device_id *devid_ptr; 2018 struct scsi_vpd_id_descriptor *desc, *desc1, *desc2, *desc3, *desc4; 2019 struct scsi_vpd_id_descriptor *desc5; 2020 struct scsi_vpd_id_t10 *t10id; 2021 struct ctl_lun *lun; 2022 const struct icl_pdu *request; 2023 int i, ret; 2024 char *val; 2025 size_t data_len, devid_len, wwnn_len, wwpn_len, lun_name_len; 2026 2027 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 2028 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2029 cs = PDU_SESSION(request); 2030 2031 wwpn_len = strlen(cs->cs_target->ct_name); 2032 wwpn_len += strlen(",t,0x0001"); 2033 wwpn_len += 1; /* '\0' */ 2034 if ((wwpn_len % 4) != 0) 2035 wwpn_len += (4 - (wwpn_len % 4)); 2036 2037 wwnn_len = strlen(cs->cs_target->ct_name); 2038 wwnn_len += 1; /* '\0' */ 2039 if ((wwnn_len % 4) != 0) 2040 wwnn_len += (4 - (wwnn_len % 4)); 2041 2042 if (lun == NULL) { 2043 devid_len = CTL_DEVID_MIN_LEN; 2044 lun_name_len = 0; 2045 } else { 2046 devid_len = max(CTL_DEVID_MIN_LEN, 2047 strnlen(lun->be_lun->device_id, CTL_DEVID_LEN)); 2048 lun_name_len = strlen(cs->cs_target->ct_name); 2049 lun_name_len += strlen(",lun,XXXXXXXX"); 2050 lun_name_len += 1; /* '\0' */ 2051 if ((lun_name_len % 4) != 0) 2052 lun_name_len += (4 - (lun_name_len % 4)); 2053 } 2054 2055 data_len = sizeof(struct scsi_vpd_device_id) + 2056 sizeof(struct scsi_vpd_id_descriptor) + 2057 sizeof(struct scsi_vpd_id_t10) + devid_len + 2058 sizeof(struct scsi_vpd_id_descriptor) + lun_name_len + 2059 sizeof(struct scsi_vpd_id_descriptor) + wwnn_len + 2060 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 2061 sizeof(struct scsi_vpd_id_descriptor) + 2062 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 2063 sizeof(struct scsi_vpd_id_descriptor) + 2064 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 2065 2066 ctsio->kern_data_ptr = malloc(data_len, M_CTL, M_WAITOK | M_ZERO); 2067 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 2068 ctsio->kern_sg_entries = 0; 2069 2070 if (data_len < alloc_len) { 2071 ctsio->residual = alloc_len - data_len; 2072 ctsio->kern_data_len = data_len; 2073 ctsio->kern_total_len = data_len; 2074 } else { 2075 ctsio->residual = 0; 2076 ctsio->kern_data_len = alloc_len; 2077 ctsio->kern_total_len = alloc_len; 2078 } 2079 ctsio->kern_data_resid = 0; 2080 ctsio->kern_rel_offset = 0; 2081 ctsio->kern_sg_entries = 0; 2082 2083 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2084 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2085 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2086 sizeof(struct scsi_vpd_id_t10) + devid_len); 2087 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2088 lun_name_len); 2089 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2090 wwnn_len); 2091 desc4 = (struct scsi_vpd_id_descriptor *)(&desc3->identifier[0] + 2092 wwpn_len); 2093 desc5 = (struct scsi_vpd_id_descriptor *)(&desc4->identifier[0] + 2094 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2095 2096 if (lun != NULL) 2097 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2098 lun->be_lun->lun_type; 2099 else 2100 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2101 2102 devid_ptr->page_code = SVPD_DEVICE_ID; 2103 2104 scsi_ulto2b(data_len - 4, devid_ptr->length); 2105 2106 /* 2107 * We're using a LUN association here. i.e., this device ID is a 2108 * per-LUN identifier. 2109 */ 2110 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2111 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2112 desc->length = sizeof(*t10id) + devid_len; 2113 if (lun == NULL || (val = ctl_get_opt(&lun->be_lun->options, 2114 "vendor")) == NULL) { 2115 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2116 } else { 2117 memset(t10id->vendor, ' ', sizeof(t10id->vendor)); 2118 strncpy(t10id->vendor, val, 2119 min(sizeof(t10id->vendor), strlen(val))); 2120 } 2121 2122 /* 2123 * If we've actually got a backend, copy the device id from the 2124 * per-LUN data. Otherwise, set it to all spaces. 2125 */ 2126 if (lun != NULL) { 2127 /* 2128 * Copy the backend's LUN ID. 2129 */ 2130 strncpy((char *)t10id->vendor_spec_id, 2131 (char *)lun->be_lun->device_id, devid_len); 2132 } else { 2133 /* 2134 * No backend, set this to spaces. 2135 */ 2136 memset(t10id->vendor_spec_id, 0x20, devid_len); 2137 } 2138 2139 /* 2140 * desc1 is for the unique LUN name. 2141 * 2142 * XXX: According to SPC-3, LUN must report the same ID through 2143 * all the ports. The code below, however, reports the 2144 * ID only via iSCSI. 2145 */ 2146 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2147 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | 2148 SVPD_ID_TYPE_SCSI_NAME; 2149 desc1->length = lun_name_len; 2150 if (lun != NULL) { 2151 /* 2152 * Find the per-target LUN number. 2153 */ 2154 for (i = 0; i < CTL_MAX_LUNS; i++) { 2155 if (cs->cs_target->ct_luns[i] == lun->lun) 2156 break; 2157 } 2158 KASSERT(i < CTL_MAX_LUNS, 2159 ("lun %jd not found", (uintmax_t)lun->lun)); 2160 ret = snprintf(desc1->identifier, lun_name_len, "%s,lun,%d", 2161 cs->cs_target->ct_name, i); 2162 KASSERT(ret > 0 && ret <= lun_name_len, ("bad snprintf")); 2163 } else { 2164 KASSERT(lun_name_len == 0, ("no lun, but lun_name_len != 0")); 2165 } 2166 2167 /* 2168 * desc2 is for the Target Name. 2169 */ 2170 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2171 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2172 SVPD_ID_TYPE_SCSI_NAME; 2173 desc2->length = wwnn_len; 2174 snprintf(desc2->identifier, wwnn_len, "%s", cs->cs_target->ct_name); 2175 2176 /* 2177 * desc3 is for the WWPN which is a port asscociation. 2178 */ 2179 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2180 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2181 SVPD_ID_TYPE_SCSI_NAME; 2182 desc3->length = wwpn_len; 2183 snprintf(desc3->identifier, wwpn_len, "%s,t,0x%4.4x", 2184 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2185 2186 /* 2187 * desc3 is for the Relative Target Port(type 4h) identifier 2188 */ 2189 desc4->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2190 desc4->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2191 SVPD_ID_TYPE_RELTARG; 2192 desc4->length = 4; 2193 desc4->identifier[3] = 1; 2194 2195 /* 2196 * desc4 is for the Target Port Group(type 5h) identifier 2197 */ 2198 desc5->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2199 desc5->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2200 SVPD_ID_TYPE_TPORTGRP; 2201 desc5->length = 4; 2202 desc5->identifier[3] = 1; 2203 2204 ctsio->scsi_status = SCSI_STATUS_OK; 2205 2206 ctsio->io_hdr.flags |= CTL_FLAG_ALLOCATED; 2207 ctsio->be_move_done = ctl_config_move_done; 2208 ctl_datamove((union ctl_io *)ctsio); 2209 2210 return (CTL_RETVAL_COMPLETE); 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 free(ct, M_CFISCSI); 2231 2232 return; 2233 } 2234 mtx_unlock(&softc->lock); 2235} 2236 2237static struct cfiscsi_target * 2238cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2239{ 2240 struct cfiscsi_target *ct; 2241 2242 mtx_lock(&softc->lock); 2243 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2244 if (strcmp(name, ct->ct_name) != 0) 2245 continue; 2246 cfiscsi_target_hold(ct); 2247 mtx_unlock(&softc->lock); 2248 return (ct); 2249 } 2250 mtx_unlock(&softc->lock); 2251 2252 return (NULL); 2253} 2254 2255static struct cfiscsi_target * 2256cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2257 const char *alias) 2258{ 2259 struct cfiscsi_target *ct, *newct; 2260 int i; 2261 2262 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2263 return (NULL); 2264 2265 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2266 2267 mtx_lock(&softc->lock); 2268 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2269 if (strcmp(name, ct->ct_name) != 0) 2270 continue; 2271 cfiscsi_target_hold(ct); 2272 mtx_unlock(&softc->lock); 2273 free(newct, M_CFISCSI); 2274 return (ct); 2275 } 2276 2277 for (i = 0; i < CTL_MAX_LUNS; i++) 2278 newct->ct_luns[i] = -1; 2279 2280 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2281 if (alias != NULL) 2282 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2283 refcount_init(&newct->ct_refcount, 1); 2284 newct->ct_softc = softc; 2285 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2286 mtx_unlock(&softc->lock); 2287 2288 return (newct); 2289} 2290 2291/* 2292 * Takes LUN from the target space and returns LUN from the CTL space. 2293 */ 2294static uint32_t 2295cfiscsi_map_lun(void *arg, uint32_t lun) 2296{ 2297 struct cfiscsi_session *cs; 2298 2299 cs = arg; 2300 2301 if (lun >= CTL_MAX_LUNS) { 2302 CFISCSI_DEBUG("requested lun number %d is higher " 2303 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2304 return (0xffffffff); 2305 } 2306 2307 if (cs->cs_target->ct_luns[lun] < 0) 2308 return (0xffffffff); 2309 2310 return (cs->cs_target->ct_luns[lun]); 2311} 2312 2313static int 2314cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2315 unsigned long lun_id, unsigned long ctl_lun_id) 2316{ 2317 2318 if (lun_id >= CTL_MAX_LUNS) { 2319 CFISCSI_WARN("requested lun number %ld is higher " 2320 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2321 return (-1); 2322 } 2323 2324 if (ct->ct_luns[lun_id] >= 0) { 2325 /* 2326 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2327 * when the LUN is created, and a second time just before 2328 * the port is brought online; don't emit warnings 2329 * for that case. 2330 */ 2331 if (ct->ct_luns[lun_id] == ctl_lun_id) 2332 return (0); 2333 CFISCSI_WARN("lun %ld already allocated", lun_id); 2334 return (-1); 2335 } 2336 2337#if 0 2338 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2339 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2340#endif 2341 2342 ct->ct_luns[lun_id] = ctl_lun_id; 2343 cfiscsi_target_hold(ct); 2344 2345 return (0); 2346} 2347 2348static int 2349cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2350{ 2351 2352 if (ct->ct_luns[lun_id] < 0) { 2353 CFISCSI_WARN("lun %ld not allocated", lun_id); 2354 return (-1); 2355 } 2356 2357 ct->ct_luns[lun_id] = -1; 2358 cfiscsi_target_release(ct); 2359 2360 return (0); 2361} 2362 2363static int 2364cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2365{ 2366 struct cfiscsi_softc *softc; 2367 struct cfiscsi_target *ct; 2368 const char *target = NULL, *target_alias = NULL; 2369 const char *lun = NULL; 2370 unsigned long tmp; 2371 2372 softc = (struct cfiscsi_softc *)arg; 2373 2374 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2375 "cfiscsi_target"); 2376 target_alias = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2377 "cfiscsi_target_alias"); 2378 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2379 "cfiscsi_lun"); 2380 2381 if (target == NULL && lun == NULL) 2382 return (0); 2383 2384 if (target == NULL || lun == NULL) { 2385 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2386 "cfiscsi_lun, or the other way around; ignoring"); 2387 return (0); 2388 } 2389 2390 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2391 if (ct == NULL) { 2392 CFISCSI_WARN("failed to create target \"%s\"", target); 2393 return (0); 2394 } 2395 2396 tmp = strtoul(lun, NULL, 10); 2397 cfiscsi_target_set_lun(ct, tmp, lun_id); 2398 cfiscsi_target_release(ct); 2399 return (0); 2400} 2401 2402static int 2403cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2404{ 2405 struct cfiscsi_softc *softc; 2406 struct cfiscsi_target *ct; 2407 int i; 2408 2409 softc = (struct cfiscsi_softc *)arg; 2410 2411 mtx_lock(&softc->lock); 2412 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2413 for (i = 0; i < CTL_MAX_LUNS; i++) { 2414 if (ct->ct_luns[i] < 0) 2415 continue; 2416 if (ct->ct_luns[i] != lun_id) 2417 continue; 2418 mtx_unlock(&softc->lock); 2419 cfiscsi_target_unset_lun(ct, i); 2420 return (0); 2421 } 2422 } 2423 mtx_unlock(&softc->lock); 2424 return (0); 2425} 2426 2427static void 2428cfiscsi_datamove_in(union ctl_io *io) 2429{ 2430 struct cfiscsi_session *cs; 2431 struct icl_pdu *request, *response; 2432 const struct iscsi_bhs_scsi_command *bhssc; 2433 struct iscsi_bhs_data_in *bhsdi; 2434 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2435 size_t len, expected_len, sg_len, buffer_offset; 2436 const char *sg_addr; 2437 int ctl_sg_count, error, i; 2438 2439 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2440 cs = PDU_SESSION(request); 2441 2442 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2443 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2444 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2445 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2446 2447 if (io->scsiio.kern_sg_entries > 0) { 2448 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2449 ctl_sg_count = io->scsiio.kern_sg_entries; 2450 } else { 2451 ctl_sglist = &ctl_sg_entry; 2452 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2453 ctl_sglist->len = io->scsiio.kern_data_len; 2454 ctl_sg_count = 1; 2455 } 2456 2457 /* 2458 * This is the total amount of data to be transferred within the current 2459 * SCSI command. We need to record it so that we can properly report 2460 * underflow/underflow. 2461 */ 2462 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2463 2464 /* 2465 * This is the offset within the current SCSI command; for the first 2466 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2467 * it will be the sum of lengths of previous ones. 2468 */ 2469 buffer_offset = io->scsiio.kern_rel_offset; 2470 2471 /* 2472 * This is the transfer length expected by the initiator. In theory, 2473 * it could be different from the correct amount of data from the SCSI 2474 * point of view, even if that doesn't make any sense. 2475 */ 2476 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2477#if 0 2478 if (expected_len != io->scsiio.kern_total_len) { 2479 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2480 "actual length %zd", expected_len, 2481 (size_t)io->scsiio.kern_total_len); 2482 } 2483#endif 2484 2485 if (buffer_offset >= expected_len) { 2486#if 0 2487 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2488 "already sent the expected len", buffer_offset); 2489#endif 2490 io->scsiio.be_move_done(io); 2491 return; 2492 } 2493 2494 i = 0; 2495 sg_addr = NULL; 2496 sg_len = 0; 2497 response = NULL; 2498 bhsdi = NULL; 2499 for (;;) { 2500 if (response == NULL) { 2501 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2502 if (response == NULL) { 2503 CFISCSI_SESSION_WARN(cs, "failed to " 2504 "allocate memory; dropping connection"); 2505 ctl_set_busy(&io->scsiio); 2506 io->scsiio.be_move_done(io); 2507 cfiscsi_session_terminate(cs); 2508 return; 2509 } 2510 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2511 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2512 bhsdi->bhsdi_initiator_task_tag = 2513 bhssc->bhssc_initiator_task_tag; 2514 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2515 PDU_EXPDATASN(request)++; 2516 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2517 } 2518 2519 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2520 if (sg_len == 0) { 2521 sg_addr = ctl_sglist[i].addr; 2522 sg_len = ctl_sglist[i].len; 2523 KASSERT(sg_len > 0, ("sg_len <= 0")); 2524 } 2525 2526 len = sg_len; 2527 2528 /* 2529 * Truncate to maximum data segment length. 2530 */ 2531 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2532 ("ip_data_len %zd >= max_data_segment_length %zd", 2533 response->ip_data_len, cs->cs_max_data_segment_length)); 2534 if (response->ip_data_len + len > 2535 cs->cs_max_data_segment_length) { 2536 len = cs->cs_max_data_segment_length - 2537 response->ip_data_len; 2538 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2539 len, sg_len)); 2540 } 2541 2542 /* 2543 * Truncate to expected data transfer length. 2544 */ 2545 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2546 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2547 buffer_offset, response->ip_data_len, expected_len)); 2548 if (buffer_offset + response->ip_data_len + len > expected_len) { 2549 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2550 "to expected data transfer length %zd", 2551 buffer_offset + response->ip_data_len + len, expected_len); 2552 len = expected_len - (buffer_offset + response->ip_data_len); 2553 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2554 len, sg_len)); 2555 } 2556 2557 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2558 if (error != 0) { 2559 CFISCSI_SESSION_WARN(cs, "failed to " 2560 "allocate memory; dropping connection"); 2561 icl_pdu_free(response); 2562 ctl_set_busy(&io->scsiio); 2563 io->scsiio.be_move_done(io); 2564 cfiscsi_session_terminate(cs); 2565 return; 2566 } 2567 sg_addr += len; 2568 sg_len -= len; 2569 2570 KASSERT(buffer_offset + request->ip_data_len <= expected_len, 2571 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2572 buffer_offset, request->ip_data_len, expected_len)); 2573 if (buffer_offset + request->ip_data_len == expected_len) { 2574 /* 2575 * Already have the amount of data the initiator wanted. 2576 */ 2577 break; 2578 } 2579 2580 if (sg_len == 0) { 2581 /* 2582 * End of scatter-gather segment; 2583 * proceed to the next one... 2584 */ 2585 if (i == ctl_sg_count - 1) { 2586 /* 2587 * ... unless this was the last one. 2588 */ 2589 break; 2590 } 2591 i++; 2592 } 2593 2594 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2595 /* 2596 * Can't stuff more data into the current PDU; 2597 * queue it. Note that's not enough to check 2598 * for kern_data_resid == 0 instead; there 2599 * may be several Data-In PDUs for the final 2600 * call to cfiscsi_datamove(), and we want 2601 * to set the F flag only on the last of them. 2602 */ 2603 buffer_offset += response->ip_data_len; 2604 if (buffer_offset == io->scsiio.kern_total_len || 2605 buffer_offset == expected_len) 2606 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2607 cfiscsi_pdu_queue(response); 2608 response = NULL; 2609 bhsdi = NULL; 2610 } 2611 } 2612 if (response != NULL) { 2613 buffer_offset += response->ip_data_len; 2614 if (buffer_offset == io->scsiio.kern_total_len || 2615 buffer_offset == expected_len) 2616 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2617 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2618 cfiscsi_pdu_queue(response); 2619 } 2620 2621 io->scsiio.be_move_done(io); 2622} 2623 2624static void 2625cfiscsi_datamove_out(union ctl_io *io) 2626{ 2627 struct cfiscsi_session *cs; 2628 struct icl_pdu *request, *response; 2629 const struct iscsi_bhs_scsi_command *bhssc; 2630 struct iscsi_bhs_r2t *bhsr2t; 2631 struct cfiscsi_data_wait *cdw; 2632 uint32_t target_transfer_tag; 2633 bool done; 2634 2635 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2636 cs = PDU_SESSION(request); 2637 2638 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2639 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2640 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2641 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2642 2643 /* 2644 * We need to record it so that we can properly report 2645 * underflow/underflow. 2646 */ 2647 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2648 2649 /* 2650 * We hadn't received anything during this datamove yet. 2651 */ 2652 io->scsiio.ext_data_filled = 0; 2653 2654 target_transfer_tag = 2655 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2656 2657#if 0 2658 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2659 "task tag 0x%x, target transfer tag 0x%x", 2660 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2661#endif 2662 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2663 if (cdw == NULL) { 2664 CFISCSI_SESSION_WARN(cs, "failed to " 2665 "allocate memory; dropping connection"); 2666 ctl_set_busy(&io->scsiio); 2667 io->scsiio.be_move_done(io); 2668 cfiscsi_session_terminate(cs); 2669 return; 2670 } 2671 cdw->cdw_ctl_io = io; 2672 cdw->cdw_target_transfer_tag = target_transfer_tag; 2673 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2674 2675 if (cs->cs_immediate_data && io->scsiio.kern_rel_offset < 2676 icl_pdu_data_segment_length(request)) { 2677 done = cfiscsi_handle_data_segment(request, cdw); 2678 if (done) { 2679 uma_zfree(cfiscsi_data_wait_zone, cdw); 2680 io->scsiio.be_move_done(io); 2681 return; 2682 } 2683 } 2684 2685 CFISCSI_SESSION_LOCK(cs); 2686 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2687 CFISCSI_SESSION_UNLOCK(cs); 2688 2689 /* 2690 * XXX: We should limit the number of outstanding R2T PDUs 2691 * per task to MaxOutstandingR2T. 2692 */ 2693 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2694 if (response == NULL) { 2695 CFISCSI_SESSION_WARN(cs, "failed to " 2696 "allocate memory; dropping connection"); 2697 ctl_set_busy(&io->scsiio); 2698 io->scsiio.be_move_done(io); 2699 cfiscsi_session_terminate(cs); 2700 return; 2701 } 2702 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2703 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2704 bhsr2t->bhsr2t_flags = 0x80; 2705 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2706 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2707 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2708 /* 2709 * XXX: Here we assume that cfiscsi_datamove() won't ever 2710 * be running concurrently on several CPUs for a given 2711 * command. 2712 */ 2713 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2714 PDU_R2TSN(request)++; 2715 /* 2716 * This is the offset within the current SCSI command; 2717 * i.e. for the first call of datamove(), it will be 0, 2718 * and for subsequent ones it will be the sum of lengths 2719 * of previous ones. 2720 * 2721 * The ext_data_filled is to account for unsolicited 2722 * (immediate) data that might have already arrived. 2723 */ 2724 bhsr2t->bhsr2t_buffer_offset = 2725 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2726 /* 2727 * This is the total length (sum of S/G lengths) this call 2728 * to cfiscsi_datamove() is supposed to handle. 2729 * 2730 * XXX: Limit it to MaxBurstLength. 2731 */ 2732 bhsr2t->bhsr2t_desired_data_transfer_length = 2733 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2734 cfiscsi_pdu_queue(response); 2735} 2736 2737static void 2738cfiscsi_datamove(union ctl_io *io) 2739{ 2740 2741 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2742 cfiscsi_datamove_in(io); 2743 else 2744 cfiscsi_datamove_out(io); 2745} 2746 2747static void 2748cfiscsi_scsi_command_done(union ctl_io *io) 2749{ 2750 struct icl_pdu *request, *response; 2751 struct iscsi_bhs_scsi_command *bhssc; 2752 struct iscsi_bhs_scsi_response *bhssr; 2753#ifdef DIAGNOSTIC 2754 struct cfiscsi_data_wait *cdw; 2755#endif 2756 struct cfiscsi_session *cs; 2757 uint16_t sense_length; 2758 2759 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2760 cs = PDU_SESSION(request); 2761 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2762 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2763 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2764 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2765 2766 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2767 // bhssc->bhssc_initiator_task_tag); 2768 2769#ifdef DIAGNOSTIC 2770 CFISCSI_SESSION_LOCK(cs); 2771 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2772 KASSERT(bhssc->bhssc_initiator_task_tag != 2773 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2774 CFISCSI_SESSION_UNLOCK(cs); 2775#endif 2776 2777 /* 2778 * Do not return status for aborted commands. 2779 * There are exceptions, but none supported by CTL yet. 2780 */ 2781 if (io->io_hdr.status == CTL_CMD_ABORTED) { 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 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2914 if (request == NULL) { 2915 /* 2916 * Implicit task termination has just completed; nothing to do. 2917 */ 2918 return; 2919 } 2920 2921 cs = PDU_SESSION(request); 2922 refcount_release(&cs->cs_outstanding_ctl_pdus); 2923 2924 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2925 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2926 cfiscsi_scsi_command_done(io); 2927 break; 2928 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2929 cfiscsi_task_management_done(io); 2930 break; 2931 default: 2932 panic("cfiscsi_done called with wrong opcode 0x%x", 2933 request->ip_bhs->bhs_opcode); 2934 } 2935} 2936