ctl_frontend_iscsi.c revision 267639
1/*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 267639 2014-06-19 09:46:43Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 267639 2014-06-19 09:46:43Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capsicum.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include "../../dev/iscsi/icl.h" 71#include "../../dev/iscsi/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_targ_enable(void *arg, struct ctl_id targ_id); 153static int cfiscsi_targ_disable(void *arg, struct ctl_id targ_id); 154static int cfiscsi_lun_enable(void *arg, 155 struct ctl_id target_id, int lun_id); 156static int cfiscsi_lun_disable(void *arg, 157 struct ctl_id target_id, int lun_id); 158static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160static int cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len); 161static void cfiscsi_datamove(union ctl_io *io); 162static void cfiscsi_done(union ctl_io *io); 163static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun); 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 void cfiscsi_target_release(struct cfiscsi_target *ct); 174static void cfiscsi_session_delete(struct cfiscsi_session *cs); 175 176static struct cfiscsi_softc cfiscsi_softc; 177extern struct ctl_softc *control_softc; 178 179static int cfiscsi_module_event_handler(module_t, int /*modeventtype_t*/, void *); 180 181static moduledata_t cfiscsi_moduledata = { 182 "ctlcfiscsi", 183 cfiscsi_module_event_handler, 184 NULL 185}; 186 187DECLARE_MODULE(ctlcfiscsi, cfiscsi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH); 188MODULE_VERSION(ctlcfiscsi, 1); 189MODULE_DEPEND(ctlcfiscsi, ctl, 1, 1, 1); 190MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 191 192static struct icl_pdu * 193cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 194{ 195 196 return (icl_pdu_new_bhs(request->ip_conn, flags)); 197} 198 199static bool 200cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 201{ 202 const struct iscsi_bhs_scsi_command *bhssc; 203 struct cfiscsi_session *cs; 204 uint32_t cmdsn, expstatsn; 205 206 cs = PDU_SESSION(request); 207 208 /* 209 * Every incoming PDU - not just NOP-Out - resets the ping timer. 210 * The purpose of the timeout is to reset the connection when it stalls; 211 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 212 * in some queue. 213 * 214 * XXX: Locking? 215 */ 216 cs->cs_timeout = 0; 217 218 /* 219 * Data-Out PDUs don't contain CmdSN. 220 */ 221 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 222 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 223 return (false); 224 225 /* 226 * We're only using fields common for all the request 227 * (initiator -> target) PDUs. 228 */ 229 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 230 cmdsn = ntohl(bhssc->bhssc_cmdsn); 231 expstatsn = ntohl(bhssc->bhssc_expstatsn); 232 233 CFISCSI_SESSION_LOCK(cs); 234#if 0 235 if (expstatsn != cs->cs_statsn) { 236 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 237 "while current StatSN is %d", expstatsn, 238 cs->cs_statsn); 239 } 240#endif 241 242 /* 243 * The target MUST silently ignore any non-immediate command outside 244 * of this range. 245 */ 246 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 247 CFISCSI_SESSION_UNLOCK(cs); 248 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 249 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 250 return (true); 251 } 252 253 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 254 cs->cs_cmdsn++; 255 256 CFISCSI_SESSION_UNLOCK(cs); 257 258 return (false); 259} 260 261static void 262cfiscsi_pdu_handle(struct icl_pdu *request) 263{ 264 struct cfiscsi_session *cs; 265 bool ignore; 266 267 cs = PDU_SESSION(request); 268 269 ignore = cfiscsi_pdu_update_cmdsn(request); 270 if (ignore) { 271 icl_pdu_free(request); 272 return; 273 } 274 275 /* 276 * Handle the PDU; this includes e.g. receiving the remaining 277 * part of PDU and submitting the SCSI command to CTL 278 * or queueing a reply. The handling routine is responsible 279 * for freeing the PDU when it's no longer needed. 280 */ 281 switch (request->ip_bhs->bhs_opcode & 282 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 283 case ISCSI_BHS_OPCODE_NOP_OUT: 284 cfiscsi_pdu_handle_nop_out(request); 285 break; 286 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 287 cfiscsi_pdu_handle_scsi_command(request); 288 break; 289 case ISCSI_BHS_OPCODE_TASK_REQUEST: 290 cfiscsi_pdu_handle_task_request(request); 291 break; 292 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 293 cfiscsi_pdu_handle_data_out(request); 294 break; 295 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 296 cfiscsi_pdu_handle_logout_request(request); 297 break; 298 default: 299 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 300 "opcode 0x%x; dropping connection", 301 request->ip_bhs->bhs_opcode); 302 icl_pdu_free(request); 303 cfiscsi_session_terminate(cs); 304 } 305 306} 307 308static void 309cfiscsi_receive_callback(struct icl_pdu *request) 310{ 311 struct cfiscsi_session *cs; 312 313 cs = PDU_SESSION(request); 314 315#ifdef ICL_KERNEL_PROXY 316 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 317 if (cs->cs_login_pdu == NULL) 318 cs->cs_login_pdu = request; 319 else 320 icl_pdu_free(request); 321 cv_signal(&cs->cs_login_cv); 322 return; 323 } 324#endif 325 326 cfiscsi_pdu_handle(request); 327} 328 329static void 330cfiscsi_error_callback(struct icl_conn *ic) 331{ 332 struct cfiscsi_session *cs; 333 334 cs = CONN_SESSION(ic); 335 336 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 337 cfiscsi_session_terminate(cs); 338} 339 340static int 341cfiscsi_pdu_prepare(struct icl_pdu *response) 342{ 343 struct cfiscsi_session *cs; 344 struct iscsi_bhs_scsi_response *bhssr; 345 bool advance_statsn = true; 346 347 cs = PDU_SESSION(response); 348 349 CFISCSI_SESSION_LOCK_ASSERT(cs); 350 351 /* 352 * We're only using fields common for all the response 353 * (target -> initiator) PDUs. 354 */ 355 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 356 357 /* 358 * 10.8.3: "The StatSN for this connection is not advanced 359 * after this PDU is sent." 360 */ 361 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 362 advance_statsn = false; 363 364 /* 365 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 366 * StatSN for the connection is not advanced after this PDU is sent." 367 */ 368 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 369 bhssr->bhssr_initiator_task_tag == 0xffffffff) 370 advance_statsn = false; 371 372 /* 373 * See the comment below - StatSN is not meaningful and must 374 * not be advanced. 375 */ 376 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 377 advance_statsn = false; 378 379 /* 380 * 10.7.3: "The fields StatSN, Status, and Residual Count 381 * only have meaningful content if the S bit is set to 1." 382 */ 383 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 384 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 385 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 386 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 387 388 if (advance_statsn) 389 cs->cs_statsn++; 390 391 return (0); 392} 393 394static void 395cfiscsi_pdu_queue(struct icl_pdu *response) 396{ 397 struct cfiscsi_session *cs; 398 399 cs = PDU_SESSION(response); 400 401 CFISCSI_SESSION_LOCK(cs); 402 cfiscsi_pdu_prepare(response); 403 icl_pdu_queue(response); 404 CFISCSI_SESSION_UNLOCK(cs); 405} 406 407static uint32_t 408cfiscsi_decode_lun(uint64_t encoded) 409{ 410 uint8_t lun[8]; 411 uint32_t result; 412 413 /* 414 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 415 * but is in fact an evil, multidimensional structure defined 416 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 417 */ 418 memcpy(lun, &encoded, sizeof(lun)); 419 switch (lun[0] & 0xC0) { 420 case 0x00: 421 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 422 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 423 CFISCSI_WARN("malformed LUN " 424 "(peripheral device addressing method): 0x%jx", 425 (uintmax_t)encoded); 426 result = 0xffffffff; 427 break; 428 } 429 result = lun[1]; 430 break; 431 case 0x40: 432 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 433 lun[6] != 0 || lun[7] != 0) { 434 CFISCSI_WARN("malformed LUN " 435 "(flat address space addressing method): 0x%jx", 436 (uintmax_t)encoded); 437 result = 0xffffffff; 438 break; 439 } 440 result = ((lun[0] & 0x3f) << 8) + lun[1]; 441 break; 442 case 0xC0: 443 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 444 lun[6] != 0 || lun[7] != 0) { 445 CFISCSI_WARN("malformed LUN (extended flat " 446 "address space addressing method): 0x%jx", 447 (uintmax_t)encoded); 448 result = 0xffffffff; 449 break; 450 } 451 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 452 default: 453 CFISCSI_WARN("unsupported LUN format 0x%jx", 454 (uintmax_t)encoded); 455 result = 0xffffffff; 456 break; 457 } 458 459 return (result); 460} 461 462static void 463cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 464{ 465 struct cfiscsi_session *cs; 466 struct iscsi_bhs_nop_out *bhsno; 467 struct iscsi_bhs_nop_in *bhsni; 468 struct icl_pdu *response; 469 void *data = NULL; 470 size_t datasize; 471 int error; 472 473 cs = PDU_SESSION(request); 474 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 475 476 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 477 /* 478 * Nothing to do, iscsi_pdu_update_statsn() already 479 * zeroed the timeout. 480 */ 481 icl_pdu_free(request); 482 return; 483 } 484 485 datasize = icl_pdu_data_segment_length(request); 486 if (datasize > 0) { 487 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 488 if (data == NULL) { 489 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 490 "dropping connection"); 491 icl_pdu_free(request); 492 cfiscsi_session_terminate(cs); 493 return; 494 } 495 icl_pdu_get_data(request, 0, data, datasize); 496 } 497 498 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 499 if (response == NULL) { 500 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 501 "droppping connection"); 502 free(data, M_CFISCSI); 503 icl_pdu_free(request); 504 cfiscsi_session_terminate(cs); 505 return; 506 } 507 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 508 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 509 bhsni->bhsni_flags = 0x80; 510 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 511 bhsni->bhsni_target_transfer_tag = 0xffffffff; 512 if (datasize > 0) { 513 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 514 if (error != 0) { 515 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 516 "dropping connection"); 517 free(data, M_CFISCSI); 518 icl_pdu_free(request); 519 icl_pdu_free(response); 520 cfiscsi_session_terminate(cs); 521 return; 522 } 523 free(data, M_CFISCSI); 524 } 525 526 icl_pdu_free(request); 527 cfiscsi_pdu_queue(response); 528} 529 530static void 531cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 532{ 533 struct iscsi_bhs_scsi_command *bhssc; 534 struct cfiscsi_session *cs; 535 union ctl_io *io; 536 int error; 537 538 cs = PDU_SESSION(request); 539 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 540 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 541 // bhssc->bhssc_initiator_task_tag); 542 543 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 544 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 545 "ImmediateData=No; dropping connection"); 546 icl_pdu_free(request); 547 cfiscsi_session_terminate(cs); 548 return; 549 } 550 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 551 if (io == NULL) { 552 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 553 "dropping connection"); 554 icl_pdu_free(request); 555 cfiscsi_session_terminate(cs); 556 return; 557 } 558 ctl_zero_io(io); 559 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 560 io->io_hdr.io_type = CTL_IO_SCSI; 561 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 562 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 563 io->io_hdr.nexus.targ_target.id = 0; 564 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 565 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 566 io->io_hdr.nexus.lun_map_arg = cs; 567 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 568 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 569 case BHSSC_FLAGS_ATTR_UNTAGGED: 570 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 571 break; 572 case BHSSC_FLAGS_ATTR_SIMPLE: 573 io->scsiio.tag_type = CTL_TAG_SIMPLE; 574 break; 575 case BHSSC_FLAGS_ATTR_ORDERED: 576 io->scsiio.tag_type = CTL_TAG_ORDERED; 577 break; 578 case BHSSC_FLAGS_ATTR_HOQ: 579 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 580 break; 581 case BHSSC_FLAGS_ATTR_ACA: 582 io->scsiio.tag_type = CTL_TAG_ACA; 583 break; 584 default: 585 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 586 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 587 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 588 break; 589 } 590 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 591 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 592 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 593 error = ctl_queue(io); 594 if (error != CTL_RETVAL_COMPLETE) { 595 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 596 "dropping connection", error); 597 ctl_free_io(io); 598 refcount_release(&cs->cs_outstanding_ctl_pdus); 599 icl_pdu_free(request); 600 cfiscsi_session_terminate(cs); 601 } 602} 603 604static void 605cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 606{ 607 struct iscsi_bhs_task_management_request *bhstmr; 608 struct iscsi_bhs_task_management_response *bhstmr2; 609 struct icl_pdu *response; 610 struct cfiscsi_session *cs; 611 union ctl_io *io; 612 int error; 613 614 cs = PDU_SESSION(request); 615 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 616 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 617 if (io == NULL) { 618 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 619 "dropping connection"); 620 icl_pdu_free(request); 621 cfiscsi_session_terminate(cs); 622 return; 623 } 624 ctl_zero_io(io); 625 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 626 io->io_hdr.io_type = CTL_IO_TASK; 627 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 628 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 629 io->io_hdr.nexus.targ_target.id = 0; 630 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 631 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 632 io->io_hdr.nexus.lun_map_arg = cs; 633 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 634 635 switch (bhstmr->bhstmr_function & ~0x80) { 636 case BHSTMR_FUNCTION_ABORT_TASK: 637#if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 639#endif 640 io->taskio.task_action = CTL_TASK_ABORT_TASK; 641 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 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; 740 741 /* 742 * Make sure the offset, as sent by the initiator, matches the offset 743 * we're supposed to be at in the scatter-gather list. 744 */ 745 if (buffer_offset != 746 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 747 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 748 "expected %zd; dropping connection", buffer_offset, 749 (size_t)io->scsiio.kern_rel_offset + 750 (size_t)io->scsiio.ext_data_filled); 751 ctl_set_data_phase_error(&io->scsiio); 752 cfiscsi_session_terminate(cs); 753 return (true); 754 } 755 756 /* 757 * This is the offset within the PDU data segment, as opposed 758 * to buffer_offset, which is the offset within the task (SCSI 759 * command). 760 */ 761 off = 0; 762 len = icl_pdu_data_segment_length(request); 763 764 /* 765 * Iterate over the scatter/gather segments, filling them with data 766 * from the PDU data segment. Note that this can get called multiple 767 * times for one SCSI command; the cdw structure holds state for the 768 * scatter/gather list. 769 */ 770 for (;;) { 771 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 772 ("cdw->cdw_sg_index >= ctl_sg_count")); 773 if (cdw->cdw_sg_len == 0) { 774 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 775 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 776 } 777 KASSERT(off <= len, ("len > off")); 778 copy_len = len - off; 779 if (copy_len > cdw->cdw_sg_len) 780 copy_len = cdw->cdw_sg_len; 781 782 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 783 cdw->cdw_sg_addr += copy_len; 784 cdw->cdw_sg_len -= copy_len; 785 off += copy_len; 786 io->scsiio.ext_data_filled += copy_len; 787 788 if (cdw->cdw_sg_len == 0) { 789 /* 790 * End of current segment. 791 */ 792 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 793 /* 794 * Last segment in scatter/gather list. 795 */ 796 break; 797 } 798 cdw->cdw_sg_index++; 799 } 800 801 if (off == len) { 802 /* 803 * End of PDU payload. 804 */ 805 break; 806 } 807 } 808 809 if (len > off) { 810 /* 811 * In case of unsolicited data, it's possible that the buffer 812 * provided by CTL is smaller than negotiated FirstBurstLength. 813 * Just ignore the superfluous data; will ask for them with R2T 814 * on next call to cfiscsi_datamove(). 815 * 816 * This obviously can only happen with SCSI Command PDU. 817 */ 818 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 819 ISCSI_BHS_OPCODE_SCSI_COMMAND) { 820 CFISCSI_SESSION_DEBUG(cs, "received too much immediate " 821 "data: got %zd bytes, expected %zd", 822 icl_pdu_data_segment_length(request), off); 823 return (true); 824 } 825 826 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 827 "expected %zd; dropping connection", 828 icl_pdu_data_segment_length(request), off); 829 ctl_set_data_phase_error(&io->scsiio); 830 cfiscsi_session_terminate(cs); 831 return (true); 832 } 833 834 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len && 835 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 836 CFISCSI_SESSION_WARN(cs, "got the final packet without " 837 "the F flag; flags = 0x%x; dropping connection", 838 bhsdo->bhsdo_flags); 839 ctl_set_data_phase_error(&io->scsiio); 840 cfiscsi_session_terminate(cs); 841 return (true); 842 } 843 844 if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len && 845 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 846 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 847 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 848 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 849 "transmitted size was %zd bytes instead of %d; " 850 "dropping connection", 851 (size_t)io->scsiio.ext_data_filled, 852 io->scsiio.kern_data_len); 853 ctl_set_data_phase_error(&io->scsiio); 854 cfiscsi_session_terminate(cs); 855 return (true); 856 } else { 857 /* 858 * For SCSI Command PDU, this just means we need to 859 * solicit more data by sending R2T. 860 */ 861 return (false); 862 } 863 } 864 865 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) { 866#if 0 867 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 868 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 869#endif 870 871 return (true); 872 } 873 874 return (false); 875} 876 877static void 878cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 879{ 880 struct iscsi_bhs_data_out *bhsdo; 881 struct cfiscsi_session *cs; 882 struct cfiscsi_data_wait *cdw = NULL; 883 union ctl_io *io; 884 bool done; 885 886 cs = PDU_SESSION(request); 887 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 888 889 CFISCSI_SESSION_LOCK(cs); 890 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 891#if 0 892 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 893 "ttt 0x%x, itt 0x%x", 894 bhsdo->bhsdo_target_transfer_tag, 895 bhsdo->bhsdo_initiator_task_tag, 896 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 897#endif 898 if (bhsdo->bhsdo_target_transfer_tag == 899 cdw->cdw_target_transfer_tag) 900 break; 901 } 902 CFISCSI_SESSION_UNLOCK(cs); 903 if (cdw == NULL) { 904 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 905 "0x%x, not found; dropping connection", 906 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 907 icl_pdu_free(request); 908 cfiscsi_session_terminate(cs); 909 return; 910 } 911 912 io = cdw->cdw_ctl_io; 913 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 914 ("CTL_FLAG_DATA_IN")); 915 916 done = cfiscsi_handle_data_segment(request, cdw); 917 if (done) { 918 CFISCSI_SESSION_LOCK(cs); 919 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 920 CFISCSI_SESSION_UNLOCK(cs); 921 uma_zfree(cfiscsi_data_wait_zone, cdw); 922 io->scsiio.be_move_done(io); 923 } 924 925 icl_pdu_free(request); 926} 927 928static void 929cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 930{ 931 struct iscsi_bhs_logout_request *bhslr; 932 struct iscsi_bhs_logout_response *bhslr2; 933 struct icl_pdu *response; 934 struct cfiscsi_session *cs; 935 936 cs = PDU_SESSION(request); 937 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 938 switch (bhslr->bhslr_reason & 0x7f) { 939 case BHSLR_REASON_CLOSE_SESSION: 940 case BHSLR_REASON_CLOSE_CONNECTION: 941 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 942 if (response == NULL) { 943 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 944 icl_pdu_free(request); 945 cfiscsi_session_terminate(cs); 946 return; 947 } 948 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 949 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 950 bhslr2->bhslr_flags = 0x80; 951 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 952 bhslr2->bhslr_initiator_task_tag = 953 bhslr->bhslr_initiator_task_tag; 954 icl_pdu_free(request); 955 cfiscsi_pdu_queue(response); 956 cfiscsi_session_terminate(cs); 957 break; 958 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 959 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 960 if (response == NULL) { 961 CFISCSI_SESSION_WARN(cs, 962 "failed to allocate memory; dropping connection"); 963 icl_pdu_free(request); 964 cfiscsi_session_terminate(cs); 965 return; 966 } 967 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 968 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 969 bhslr2->bhslr_flags = 0x80; 970 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 971 bhslr2->bhslr_initiator_task_tag = 972 bhslr->bhslr_initiator_task_tag; 973 icl_pdu_free(request); 974 cfiscsi_pdu_queue(response); 975 break; 976 default: 977 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 978 bhslr->bhslr_reason); 979 icl_pdu_free(request); 980 cfiscsi_session_terminate(cs); 981 break; 982 } 983} 984 985static void 986cfiscsi_callout(void *context) 987{ 988 struct icl_pdu *cp; 989 struct iscsi_bhs_nop_in *bhsni; 990 struct cfiscsi_session *cs; 991 992 cs = context; 993 994 if (cs->cs_terminating) 995 return; 996 997 callout_schedule(&cs->cs_callout, 1 * hz); 998 999 atomic_add_int(&cs->cs_timeout, 1); 1000 1001#ifdef ICL_KERNEL_PROXY 1002 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1003 if (cs->cs_timeout > login_timeout) { 1004 CFISCSI_SESSION_WARN(cs, "login timed out after " 1005 "%d seconds; dropping connection", cs->cs_timeout); 1006 cfiscsi_session_terminate(cs); 1007 } 1008 return; 1009 } 1010#endif 1011 1012 if (cs->cs_timeout >= ping_timeout) { 1013 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1014 "dropping connection", ping_timeout); 1015 cfiscsi_session_terminate(cs); 1016 return; 1017 } 1018 1019 /* 1020 * If the ping was reset less than one second ago - which means 1021 * that we've received some PDU during the last second - assume 1022 * the traffic flows correctly and don't bother sending a NOP-Out. 1023 * 1024 * (It's 2 - one for one second, and one for incrementing is_timeout 1025 * earlier in this routine.) 1026 */ 1027 if (cs->cs_timeout < 2) 1028 return; 1029 1030 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1031 if (cp == NULL) { 1032 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1033 return; 1034 } 1035 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1036 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1037 bhsni->bhsni_flags = 0x80; 1038 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1039 1040 cfiscsi_pdu_queue(cp); 1041} 1042 1043static void 1044cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1045{ 1046 struct cfiscsi_data_wait *cdw, *tmpcdw; 1047 union ctl_io *io; 1048 int error, last; 1049 1050#ifdef notyet 1051 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1052 if (io == NULL) { 1053 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1054 return; 1055 } 1056 ctl_zero_io(io); 1057 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1058 io->io_hdr.io_type = CTL_IO_TASK; 1059 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1060 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1061 io->io_hdr.nexus.targ_target.id = 0; 1062 io->io_hdr.nexus.targ_lun = lun; 1063 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1064 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1065 error = ctl_queue(io); 1066 if (error != CTL_RETVAL_COMPLETE) { 1067 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1068 ctl_free_io(io); 1069 } 1070#else 1071 /* 1072 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1073 * just iterate over tasks that are waiting for something - data - and 1074 * terminate those. 1075 */ 1076 CFISCSI_SESSION_LOCK(cs); 1077 TAILQ_FOREACH_SAFE(cdw, 1078 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1079 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1080 if (io == NULL) { 1081 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1082 return; 1083 } 1084 ctl_zero_io(io); 1085 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1086 io->io_hdr.io_type = CTL_IO_TASK; 1087 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1088 io->io_hdr.nexus.targ_port = 1089 cs->cs_target->ct_softc->fe.targ_port; 1090 io->io_hdr.nexus.targ_target.id = 0; 1091 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1092 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1093 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1094 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1095 error = ctl_queue(io); 1096 if (error != CTL_RETVAL_COMPLETE) { 1097 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1098 ctl_free_io(io); 1099 return; 1100 } 1101#if 0 1102 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1103 "0x%x", cdw->cdw_initiator_task_tag); 1104#endif 1105 /* 1106 * Set nonzero port status; this prevents backends from 1107 * assuming that the data transfer actually succeeded 1108 * and writing uninitialized data to disk. 1109 */ 1110 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1111 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1112 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1113 uma_zfree(cfiscsi_data_wait_zone, cdw); 1114 } 1115 CFISCSI_SESSION_UNLOCK(cs); 1116#endif 1117 1118 /* 1119 * Wait for CTL to terminate all the tasks. 1120 */ 1121 for (;;) { 1122 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1123 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1124 if (last != 0) 1125 break; 1126 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, " 1127 "%d remaining", cs->cs_outstanding_ctl_pdus); 1128 pause("cfiscsi_terminate", 1); 1129 } 1130} 1131 1132static void 1133cfiscsi_maintenance_thread(void *arg) 1134{ 1135 struct cfiscsi_session *cs; 1136 1137 cs = arg; 1138 1139 for (;;) { 1140 CFISCSI_SESSION_LOCK(cs); 1141 if (cs->cs_terminating == false) 1142 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1143 CFISCSI_SESSION_UNLOCK(cs); 1144 1145 if (cs->cs_terminating) { 1146 1147 /* 1148 * We used to wait up to 30 seconds to deliver queued 1149 * PDUs to the initiator. We also tried hard to deliver 1150 * SCSI Responses for the aborted PDUs. We don't do 1151 * that anymore. We might need to revisit that. 1152 */ 1153 callout_drain(&cs->cs_callout); 1154 icl_conn_shutdown(cs->cs_conn); 1155 icl_conn_close(cs->cs_conn); 1156 1157 /* 1158 * At this point ICL receive thread is no longer 1159 * running; no new tasks can be queued. 1160 */ 1161 cfiscsi_session_terminate_tasks(cs); 1162 cfiscsi_session_delete(cs); 1163 kthread_exit(); 1164 return; 1165 } 1166 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1167 } 1168} 1169 1170static void 1171cfiscsi_session_terminate(struct cfiscsi_session *cs) 1172{ 1173 1174 if (cs->cs_terminating) 1175 return; 1176 cs->cs_terminating = true; 1177 cv_signal(&cs->cs_maintenance_cv); 1178#ifdef ICL_KERNEL_PROXY 1179 cv_signal(&cs->cs_login_cv); 1180#endif 1181} 1182 1183static int 1184cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1185{ 1186 int error, i; 1187 struct cfiscsi_softc *softc; 1188 1189 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1190 1191 softc = &cfiscsi_softc; 1192 1193 mtx_lock(&softc->lock); 1194 for (i = 0; i < softc->max_initiators; i++) { 1195 if (softc->ctl_initids[i] == 0) 1196 break; 1197 } 1198 if (i == softc->max_initiators) { 1199 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1200 softc->max_initiators); 1201 mtx_unlock(&softc->lock); 1202 return (1); 1203 } 1204 softc->ctl_initids[i] = 1; 1205 mtx_unlock(&softc->lock); 1206 1207#if 0 1208 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1209 i, softc->max_initiators); 1210#endif 1211 cs->cs_ctl_initid = i; 1212 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1213 if (error != 0) { 1214 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1215 mtx_lock(&softc->lock); 1216 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1217 mtx_unlock(&softc->lock); 1218 cs->cs_ctl_initid = -1; 1219 return (1); 1220 } 1221 1222 return (0); 1223} 1224 1225static void 1226cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1227{ 1228 int error; 1229 struct cfiscsi_softc *softc; 1230 1231 if (cs->cs_ctl_initid == -1) 1232 return; 1233 1234 softc = &cfiscsi_softc; 1235 1236 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1237 if (error != 0) { 1238 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1239 error); 1240 } 1241 mtx_lock(&softc->lock); 1242 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1243 mtx_unlock(&softc->lock); 1244 cs->cs_ctl_initid = -1; 1245} 1246 1247static struct cfiscsi_session * 1248cfiscsi_session_new(struct cfiscsi_softc *softc) 1249{ 1250 struct cfiscsi_session *cs; 1251 int error; 1252 1253 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1254 if (cs == NULL) { 1255 CFISCSI_WARN("malloc failed"); 1256 return (NULL); 1257 } 1258 cs->cs_ctl_initid = -1; 1259 1260 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1261 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1262 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1263 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1264#ifdef ICL_KERNEL_PROXY 1265 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1266#endif 1267 1268 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1269 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1270 cs->cs_conn->ic_error = cfiscsi_error_callback; 1271 cs->cs_conn->ic_prv0 = cs; 1272 1273 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1274 if (error != 0) { 1275 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1276 free(cs, M_CFISCSI); 1277 return (NULL); 1278 } 1279 1280 mtx_lock(&softc->lock); 1281 cs->cs_id = softc->last_session_id + 1; 1282 softc->last_session_id++; 1283 mtx_unlock(&softc->lock); 1284 1285 mtx_lock(&softc->lock); 1286 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1287 mtx_unlock(&softc->lock); 1288 1289 /* 1290 * Start pinging the initiator. 1291 */ 1292 callout_init(&cs->cs_callout, 1); 1293 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1294 1295 return (cs); 1296} 1297 1298static void 1299cfiscsi_session_delete(struct cfiscsi_session *cs) 1300{ 1301 struct cfiscsi_softc *softc; 1302 1303 softc = &cfiscsi_softc; 1304 1305 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1306 ("destroying session with outstanding CTL pdus")); 1307 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1308 ("destroying session with non-empty queue")); 1309 1310 cfiscsi_session_unregister_initiator(cs); 1311 if (cs->cs_target != NULL) 1312 cfiscsi_target_release(cs->cs_target); 1313 icl_conn_close(cs->cs_conn); 1314 icl_conn_free(cs->cs_conn); 1315 1316 mtx_lock(&softc->lock); 1317 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1318 mtx_unlock(&softc->lock); 1319 1320 free(cs, M_CFISCSI); 1321} 1322 1323int 1324cfiscsi_init(void) 1325{ 1326 struct cfiscsi_softc *softc; 1327 struct ctl_frontend *fe; 1328 int retval; 1329 1330 softc = &cfiscsi_softc; 1331 retval = 0; 1332 bzero(softc, sizeof(*softc)); 1333 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1334 1335#ifdef ICL_KERNEL_PROXY 1336 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1337#endif 1338 TAILQ_INIT(&softc->sessions); 1339 TAILQ_INIT(&softc->targets); 1340 1341 fe = &softc->fe; 1342 fe->port_type = CTL_PORT_ISCSI; 1343 /* XXX KDM what should the real number be here? */ 1344 fe->num_requested_ctl_io = 4096; 1345 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1346 fe->port_name = softc->port_name; 1347 fe->port_online = cfiscsi_online; 1348 fe->port_offline = cfiscsi_offline; 1349 fe->onoff_arg = softc; 1350 fe->targ_enable = cfiscsi_targ_enable; 1351 fe->targ_disable = cfiscsi_targ_disable; 1352 fe->lun_enable = cfiscsi_lun_enable; 1353 fe->lun_disable = cfiscsi_lun_disable; 1354 fe->targ_lun_arg = softc; 1355 fe->ioctl = cfiscsi_ioctl; 1356 fe->devid = cfiscsi_devid; 1357 fe->fe_datamove = cfiscsi_datamove; 1358 fe->fe_done = cfiscsi_done; 1359 1360 /* XXX KDM what should we report here? */ 1361 /* XXX These should probably be fetched from CTL. */ 1362 fe->max_targets = 1; 1363 fe->max_target_id = 15; 1364 1365 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1366 if (retval != 0) { 1367 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1368 retval); 1369 retval = 1; 1370 goto bailout; 1371 } 1372 1373 softc->max_initiators = fe->max_initiators; 1374 1375 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1376 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1377 UMA_ALIGN_PTR, 0); 1378 1379 return (0); 1380 1381bailout: 1382 return (retval); 1383} 1384 1385static int 1386cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1387{ 1388 1389 switch (what) { 1390 case MOD_LOAD: 1391 return (cfiscsi_init()); 1392 case MOD_UNLOAD: 1393 return (EBUSY); 1394 default: 1395 return (EOPNOTSUPP); 1396 } 1397} 1398 1399#ifdef ICL_KERNEL_PROXY 1400static void 1401cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1402{ 1403 struct cfiscsi_session *cs; 1404 1405 cs = cfiscsi_session_new(&cfiscsi_softc); 1406 if (cs == NULL) { 1407 CFISCSI_WARN("failed to create session"); 1408 return; 1409 } 1410 1411 icl_conn_handoff_sock(cs->cs_conn, so); 1412 cs->cs_initiator_sa = sa; 1413 cs->cs_portal_id = portal_id; 1414 cs->cs_waiting_for_ctld = true; 1415 cv_signal(&cfiscsi_softc.accept_cv); 1416} 1417#endif 1418 1419static void 1420cfiscsi_online(void *arg) 1421{ 1422 struct cfiscsi_softc *softc; 1423 1424 softc = (struct cfiscsi_softc *)arg; 1425 1426 softc->online = 1; 1427#ifdef ICL_KERNEL_PROXY 1428 if (softc->listener != NULL) 1429 icl_listen_free(softc->listener); 1430 softc->listener = icl_listen_new(cfiscsi_accept); 1431#endif 1432} 1433 1434static void 1435cfiscsi_offline(void *arg) 1436{ 1437 struct cfiscsi_softc *softc; 1438 struct cfiscsi_session *cs; 1439 1440 softc = (struct cfiscsi_softc *)arg; 1441 1442 softc->online = 0; 1443 1444 mtx_lock(&softc->lock); 1445 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1446 cfiscsi_session_terminate(cs); 1447 mtx_unlock(&softc->lock); 1448 1449#ifdef ICL_KERNEL_PROXY 1450 icl_listen_free(softc->listener); 1451 softc->listener = NULL; 1452#endif 1453} 1454 1455static int 1456cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1457{ 1458 1459 return (0); 1460} 1461 1462static int 1463cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1464{ 1465 1466 return (0); 1467} 1468 1469static void 1470cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1471{ 1472 struct cfiscsi_softc *softc; 1473 struct cfiscsi_session *cs; 1474 struct cfiscsi_target *ct; 1475 struct ctl_iscsi_handoff_params *cihp; 1476 int error; 1477 1478 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1479 softc = &cfiscsi_softc; 1480 1481 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1482 cihp->initiator_name, cihp->initiator_addr, 1483 cihp->target_name); 1484 1485 if (softc->online == 0) { 1486 ci->status = CTL_ISCSI_ERROR; 1487 snprintf(ci->error_str, sizeof(ci->error_str), 1488 "%s: port offline", __func__); 1489 return; 1490 } 1491 1492 ct = cfiscsi_target_find(softc, cihp->target_name); 1493 if (ct == NULL) { 1494 ci->status = CTL_ISCSI_ERROR; 1495 snprintf(ci->error_str, sizeof(ci->error_str), 1496 "%s: target not found", __func__); 1497 return; 1498 } 1499 1500#ifdef ICL_KERNEL_PROXY 1501 if (cihp->socket > 0 && cihp->connection_id > 0) { 1502 snprintf(ci->error_str, sizeof(ci->error_str), 1503 "both socket and connection_id set"); 1504 ci->status = CTL_ISCSI_ERROR; 1505 cfiscsi_target_release(ct); 1506 return; 1507 } 1508 if (cihp->socket == 0) { 1509 mtx_lock(&cfiscsi_softc.lock); 1510 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1511 if (cs->cs_id == cihp->socket) 1512 break; 1513 } 1514 if (cs == NULL) { 1515 mtx_unlock(&cfiscsi_softc.lock); 1516 snprintf(ci->error_str, sizeof(ci->error_str), 1517 "connection not found"); 1518 ci->status = CTL_ISCSI_ERROR; 1519 cfiscsi_target_release(ct); 1520 return; 1521 } 1522 mtx_unlock(&cfiscsi_softc.lock); 1523 } else { 1524#endif 1525 cs = cfiscsi_session_new(softc); 1526 if (cs == NULL) { 1527 ci->status = CTL_ISCSI_ERROR; 1528 snprintf(ci->error_str, sizeof(ci->error_str), 1529 "%s: cfiscsi_session_new failed", __func__); 1530 cfiscsi_target_release(ct); 1531 return; 1532 } 1533#ifdef ICL_KERNEL_PROXY 1534 } 1535#endif 1536 cs->cs_target = ct; 1537 1538 /* 1539 * First PDU of Full Feature phase has the same CmdSN as the last 1540 * PDU from the Login Phase received from the initiator. Thus, 1541 * the -1 below. 1542 */ 1543 cs->cs_portal_group_tag = cihp->portal_group_tag; 1544 cs->cs_cmdsn = cihp->cmdsn; 1545 cs->cs_statsn = cihp->statsn; 1546 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1547 cs->cs_max_burst_length = cihp->max_burst_length; 1548 cs->cs_immediate_data = !!cihp->immediate_data; 1549 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1550 cs->cs_conn->ic_header_crc32c = true; 1551 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1552 cs->cs_conn->ic_data_crc32c = true; 1553 1554 strlcpy(cs->cs_initiator_name, 1555 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1556 strlcpy(cs->cs_initiator_addr, 1557 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1558 strlcpy(cs->cs_initiator_alias, 1559 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1560 1561#ifdef ICL_KERNEL_PROXY 1562 if (cihp->socket > 0) { 1563#endif 1564 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1565 if (error != 0) { 1566 cfiscsi_session_delete(cs); 1567 ci->status = CTL_ISCSI_ERROR; 1568 snprintf(ci->error_str, sizeof(ci->error_str), 1569 "%s: icl_conn_handoff failed with error %d", 1570 __func__, error); 1571 return; 1572 } 1573#ifdef ICL_KERNEL_PROXY 1574 } 1575#endif 1576 1577 /* 1578 * Register initiator with CTL. 1579 */ 1580 cfiscsi_session_register_initiator(cs); 1581 1582#ifdef ICL_KERNEL_PROXY 1583 cs->cs_login_phase = false; 1584 1585 /* 1586 * First PDU of the Full Feature phase has likely already arrived. 1587 * We have to pick it up and execute properly. 1588 */ 1589 if (cs->cs_login_pdu != NULL) { 1590 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1591 cfiscsi_pdu_handle(cs->cs_login_pdu); 1592 cs->cs_login_pdu = NULL; 1593 } 1594#endif 1595 1596 ci->status = CTL_ISCSI_OK; 1597} 1598 1599static void 1600cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1601{ 1602 struct ctl_iscsi_list_params *cilp; 1603 struct cfiscsi_session *cs; 1604 struct cfiscsi_softc *softc; 1605 struct sbuf *sb; 1606 int error; 1607 1608 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1609 softc = &cfiscsi_softc; 1610 1611 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1612 if (sb == NULL) { 1613 ci->status = CTL_ISCSI_ERROR; 1614 snprintf(ci->error_str, sizeof(ci->error_str), 1615 "Unable to allocate %d bytes for iSCSI session list", 1616 cilp->alloc_len); 1617 return; 1618 } 1619 1620 sbuf_printf(sb, "<ctlislist>\n"); 1621 mtx_lock(&softc->lock); 1622 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1623#ifdef ICL_KERNEL_PROXY 1624 if (cs->cs_target == NULL) 1625 continue; 1626#endif 1627 error = sbuf_printf(sb, "<connection id=\"%d\">" 1628 "<initiator>%s</initiator>" 1629 "<initiator_addr>%s</initiator_addr>" 1630 "<initiator_alias>%s</initiator_alias>" 1631 "<target>%s</target>" 1632 "<target_alias>%s</target_alias>" 1633 "<header_digest>%s</header_digest>" 1634 "<data_digest>%s</data_digest>" 1635 "<max_data_segment_length>%zd</max_data_segment_length>" 1636 "<immediate_data>%d</immediate_data>" 1637 "<iser>%d</iser>" 1638 "</connection>\n", 1639 cs->cs_id, 1640 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1641 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1642 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1643 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1644 cs->cs_max_data_segment_length, 1645 cs->cs_immediate_data, 1646 cs->cs_conn->ic_iser); 1647 if (error != 0) 1648 break; 1649 } 1650 mtx_unlock(&softc->lock); 1651 error = sbuf_printf(sb, "</ctlislist>\n"); 1652 if (error != 0) { 1653 sbuf_delete(sb); 1654 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1655 snprintf(ci->error_str, sizeof(ci->error_str), 1656 "Out of space, %d bytes is too small", cilp->alloc_len); 1657 return; 1658 } 1659 sbuf_finish(sb); 1660 1661 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1662 cilp->fill_len = sbuf_len(sb) + 1; 1663 ci->status = CTL_ISCSI_OK; 1664 sbuf_delete(sb); 1665} 1666 1667static void 1668cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1669{ 1670 struct icl_pdu *response; 1671 struct iscsi_bhs_asynchronous_message *bhsam; 1672 struct ctl_iscsi_terminate_params *citp; 1673 struct cfiscsi_session *cs; 1674 struct cfiscsi_softc *softc; 1675 int found = 0; 1676 1677 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1678 softc = &cfiscsi_softc; 1679 1680 mtx_lock(&softc->lock); 1681 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1682 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1683 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1684 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1685 continue; 1686 1687 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1688 if (response == NULL) { 1689 /* 1690 * Oh well. Just terminate the connection. 1691 */ 1692 } else { 1693 bhsam = (struct iscsi_bhs_asynchronous_message *) 1694 response->ip_bhs; 1695 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1696 bhsam->bhsam_flags = 0x80; 1697 bhsam->bhsam_0xffffffff = 0xffffffff; 1698 bhsam->bhsam_async_event = 1699 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1700 cfiscsi_pdu_queue(response); 1701 } 1702 cfiscsi_session_terminate(cs); 1703 found++; 1704 } 1705 mtx_unlock(&softc->lock); 1706 1707 if (found == 0) { 1708 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1709 snprintf(ci->error_str, sizeof(ci->error_str), 1710 "No matching connections found"); 1711 return; 1712 } 1713 1714 ci->status = CTL_ISCSI_OK; 1715} 1716 1717static void 1718cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1719{ 1720 struct icl_pdu *response; 1721 struct iscsi_bhs_asynchronous_message *bhsam; 1722 struct ctl_iscsi_logout_params *cilp; 1723 struct cfiscsi_session *cs; 1724 struct cfiscsi_softc *softc; 1725 int found = 0; 1726 1727 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1728 softc = &cfiscsi_softc; 1729 1730 mtx_lock(&softc->lock); 1731 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1732 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1733 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1734 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1735 continue; 1736 1737 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1738 if (response == NULL) { 1739 ci->status = CTL_ISCSI_ERROR; 1740 snprintf(ci->error_str, sizeof(ci->error_str), 1741 "Unable to allocate memory"); 1742 mtx_unlock(&softc->lock); 1743 return; 1744 } 1745 bhsam = 1746 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1747 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1748 bhsam->bhsam_flags = 0x80; 1749 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1750 bhsam->bhsam_parameter3 = htons(10); 1751 cfiscsi_pdu_queue(response); 1752 found++; 1753 } 1754 mtx_unlock(&softc->lock); 1755 1756 if (found == 0) { 1757 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1758 snprintf(ci->error_str, sizeof(ci->error_str), 1759 "No matching connections found"); 1760 return; 1761 } 1762 1763 ci->status = CTL_ISCSI_OK; 1764} 1765 1766#ifdef ICL_KERNEL_PROXY 1767static void 1768cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1769{ 1770 struct ctl_iscsi_listen_params *cilp; 1771 struct sockaddr *sa; 1772 int error; 1773 1774 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1775 1776 if (cfiscsi_softc.listener == NULL) { 1777 CFISCSI_DEBUG("no listener"); 1778 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1779 ci->status = CTL_ISCSI_ERROR; 1780 return; 1781 } 1782 1783 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1784 if (error != 0) { 1785 CFISCSI_DEBUG("getsockaddr, error %d", error); 1786 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1787 ci->status = CTL_ISCSI_ERROR; 1788 return; 1789 } 1790 1791 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1792 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1793 if (error != 0) { 1794 free(sa, M_SONAME); 1795 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1796 snprintf(ci->error_str, sizeof(ci->error_str), 1797 "icl_listen_add failed, error %d", error); 1798 ci->status = CTL_ISCSI_ERROR; 1799 return; 1800 } 1801 1802 ci->status = CTL_ISCSI_OK; 1803} 1804 1805static void 1806cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1807{ 1808 struct ctl_iscsi_accept_params *ciap; 1809 struct cfiscsi_session *cs; 1810 int error; 1811 1812 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1813 1814 mtx_lock(&cfiscsi_softc.lock); 1815 for (;;) { 1816 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1817 if (cs->cs_waiting_for_ctld) 1818 break; 1819 } 1820 if (cs != NULL) 1821 break; 1822 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1823 if (error != 0) { 1824 mtx_unlock(&cfiscsi_softc.lock); 1825 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1826 ci->status = CTL_ISCSI_ERROR; 1827 return; 1828 } 1829 } 1830 mtx_unlock(&cfiscsi_softc.lock); 1831 1832 cs->cs_waiting_for_ctld = false; 1833 cs->cs_login_phase = true; 1834 1835 ciap->connection_id = cs->cs_id; 1836 ciap->portal_id = cs->cs_portal_id; 1837 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1838 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1839 cs->cs_initiator_sa->sa_len); 1840 if (error != 0) { 1841 snprintf(ci->error_str, sizeof(ci->error_str), 1842 "copyout failed with error %d", error); 1843 ci->status = CTL_ISCSI_ERROR; 1844 return; 1845 } 1846 1847 ci->status = CTL_ISCSI_OK; 1848} 1849 1850static void 1851cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1852{ 1853 struct ctl_iscsi_send_params *cisp; 1854 struct cfiscsi_session *cs; 1855 struct icl_pdu *ip; 1856 size_t datalen; 1857 void *data; 1858 int error; 1859 1860 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1861 1862 mtx_lock(&cfiscsi_softc.lock); 1863 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1864 if (cs->cs_id == cisp->connection_id) 1865 break; 1866 } 1867 if (cs == NULL) { 1868 mtx_unlock(&cfiscsi_softc.lock); 1869 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1870 ci->status = CTL_ISCSI_ERROR; 1871 return; 1872 } 1873 mtx_unlock(&cfiscsi_softc.lock); 1874 1875#if 0 1876 if (cs->cs_login_phase == false) 1877 return (EBUSY); 1878#endif 1879 1880 if (cs->cs_terminating) { 1881 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1882 ci->status = CTL_ISCSI_ERROR; 1883 return; 1884 } 1885 1886 datalen = cisp->data_segment_len; 1887 /* 1888 * XXX 1889 */ 1890 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1891 if (datalen > 65535) { 1892 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1893 ci->status = CTL_ISCSI_ERROR; 1894 return; 1895 } 1896 if (datalen > 0) { 1897 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1898 error = copyin(cisp->data_segment, data, datalen); 1899 if (error != 0) { 1900 free(data, M_CFISCSI); 1901 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1902 ci->status = CTL_ISCSI_ERROR; 1903 return; 1904 } 1905 } 1906 1907 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1908 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1909 if (datalen > 0) { 1910 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1911 free(data, M_CFISCSI); 1912 } 1913 CFISCSI_SESSION_LOCK(cs); 1914 icl_pdu_queue(ip); 1915 CFISCSI_SESSION_UNLOCK(cs); 1916 ci->status = CTL_ISCSI_OK; 1917} 1918 1919static void 1920cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1921{ 1922 struct ctl_iscsi_receive_params *cirp; 1923 struct cfiscsi_session *cs; 1924 struct icl_pdu *ip; 1925 void *data; 1926 int error; 1927 1928 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1929 1930 mtx_lock(&cfiscsi_softc.lock); 1931 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1932 if (cs->cs_id == cirp->connection_id) 1933 break; 1934 } 1935 if (cs == NULL) { 1936 mtx_unlock(&cfiscsi_softc.lock); 1937 snprintf(ci->error_str, sizeof(ci->error_str), 1938 "connection not found"); 1939 ci->status = CTL_ISCSI_ERROR; 1940 return; 1941 } 1942 mtx_unlock(&cfiscsi_softc.lock); 1943 1944#if 0 1945 if (is->is_login_phase == false) 1946 return (EBUSY); 1947#endif 1948 1949 CFISCSI_SESSION_LOCK(cs); 1950 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1951 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1952 if (error != 0) { 1953 CFISCSI_SESSION_UNLOCK(cs); 1954 snprintf(ci->error_str, sizeof(ci->error_str), 1955 "interrupted by signal"); 1956 ci->status = CTL_ISCSI_ERROR; 1957 return; 1958 } 1959 } 1960 1961 if (cs->cs_terminating) { 1962 CFISCSI_SESSION_UNLOCK(cs); 1963 snprintf(ci->error_str, sizeof(ci->error_str), 1964 "connection terminating"); 1965 ci->status = CTL_ISCSI_ERROR; 1966 return; 1967 } 1968 ip = cs->cs_login_pdu; 1969 cs->cs_login_pdu = NULL; 1970 CFISCSI_SESSION_UNLOCK(cs); 1971 1972 if (ip->ip_data_len > cirp->data_segment_len) { 1973 icl_pdu_free(ip); 1974 snprintf(ci->error_str, sizeof(ci->error_str), 1975 "data segment too big"); 1976 ci->status = CTL_ISCSI_ERROR; 1977 return; 1978 } 1979 1980 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1981 if (ip->ip_data_len > 0) { 1982 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1983 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1984 copyout(data, cirp->data_segment, ip->ip_data_len); 1985 free(data, M_CFISCSI); 1986 } 1987 1988 icl_pdu_free(ip); 1989 ci->status = CTL_ISCSI_OK; 1990} 1991 1992#endif /* !ICL_KERNEL_PROXY */ 1993 1994static int 1995cfiscsi_ioctl(struct cdev *dev, 1996 u_long cmd, caddr_t addr, int flag, struct thread *td) 1997{ 1998 struct ctl_iscsi *ci; 1999 2000 if (cmd != CTL_ISCSI) 2001 return (ENOTTY); 2002 2003 ci = (struct ctl_iscsi *)addr; 2004 switch (ci->type) { 2005 case CTL_ISCSI_HANDOFF: 2006 cfiscsi_ioctl_handoff(ci); 2007 break; 2008 case CTL_ISCSI_LIST: 2009 cfiscsi_ioctl_list(ci); 2010 break; 2011 case CTL_ISCSI_TERMINATE: 2012 cfiscsi_ioctl_terminate(ci); 2013 break; 2014 case CTL_ISCSI_LOGOUT: 2015 cfiscsi_ioctl_logout(ci); 2016 break; 2017#ifdef ICL_KERNEL_PROXY 2018 case CTL_ISCSI_LISTEN: 2019 cfiscsi_ioctl_listen(ci); 2020 break; 2021 case CTL_ISCSI_ACCEPT: 2022 cfiscsi_ioctl_accept(ci); 2023 break; 2024 case CTL_ISCSI_SEND: 2025 cfiscsi_ioctl_send(ci); 2026 break; 2027 case CTL_ISCSI_RECEIVE: 2028 cfiscsi_ioctl_receive(ci); 2029 break; 2030#else 2031 case CTL_ISCSI_LISTEN: 2032 case CTL_ISCSI_ACCEPT: 2033 case CTL_ISCSI_SEND: 2034 case CTL_ISCSI_RECEIVE: 2035 ci->status = CTL_ISCSI_ERROR; 2036 snprintf(ci->error_str, sizeof(ci->error_str), 2037 "%s: CTL compiled without ICL_KERNEL_PROXY", 2038 __func__); 2039 break; 2040#endif /* !ICL_KERNEL_PROXY */ 2041 default: 2042 ci->status = CTL_ISCSI_ERROR; 2043 snprintf(ci->error_str, sizeof(ci->error_str), 2044 "%s: invalid iSCSI request type %d", __func__, ci->type); 2045 break; 2046 } 2047 2048 return (0); 2049} 2050 2051static int 2052cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 2053{ 2054 struct cfiscsi_session *cs; 2055 struct scsi_vpd_device_id *devid_ptr; 2056 struct scsi_vpd_id_descriptor *desc, *desc1, *desc2, *desc3, *desc4; 2057 struct scsi_vpd_id_descriptor *desc5; 2058 struct scsi_vpd_id_t10 *t10id; 2059 struct ctl_lun *lun; 2060 const struct icl_pdu *request; 2061 int i, ret; 2062 char *val; 2063 size_t data_len, devid_len, wwnn_len, wwpn_len, lun_name_len; 2064 2065 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 2066 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2067 cs = PDU_SESSION(request); 2068 2069 wwpn_len = strlen(cs->cs_target->ct_name); 2070 wwpn_len += strlen(",t,0x0001"); 2071 wwpn_len += 1; /* '\0' */ 2072 if ((wwpn_len % 4) != 0) 2073 wwpn_len += (4 - (wwpn_len % 4)); 2074 2075 wwnn_len = strlen(cs->cs_target->ct_name); 2076 wwnn_len += 1; /* '\0' */ 2077 if ((wwnn_len % 4) != 0) 2078 wwnn_len += (4 - (wwnn_len % 4)); 2079 2080 if (lun == NULL) { 2081 devid_len = CTL_DEVID_MIN_LEN; 2082 lun_name_len = 0; 2083 } else { 2084 devid_len = max(CTL_DEVID_MIN_LEN, 2085 strnlen(lun->be_lun->device_id, CTL_DEVID_LEN)); 2086 lun_name_len = strlen(cs->cs_target->ct_name); 2087 lun_name_len += strlen(",lun,XXXXXXXX"); 2088 lun_name_len += 1; /* '\0' */ 2089 if ((lun_name_len % 4) != 0) 2090 lun_name_len += (4 - (lun_name_len % 4)); 2091 } 2092 2093 data_len = sizeof(struct scsi_vpd_device_id) + 2094 sizeof(struct scsi_vpd_id_descriptor) + 2095 sizeof(struct scsi_vpd_id_t10) + devid_len + 2096 sizeof(struct scsi_vpd_id_descriptor) + lun_name_len + 2097 sizeof(struct scsi_vpd_id_descriptor) + wwnn_len + 2098 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 2099 sizeof(struct scsi_vpd_id_descriptor) + 2100 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 2101 sizeof(struct scsi_vpd_id_descriptor) + 2102 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 2103 2104 ctsio->kern_data_ptr = malloc(data_len, M_CTL, M_WAITOK | M_ZERO); 2105 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 2106 ctsio->kern_sg_entries = 0; 2107 2108 if (data_len < alloc_len) { 2109 ctsio->residual = alloc_len - data_len; 2110 ctsio->kern_data_len = data_len; 2111 ctsio->kern_total_len = data_len; 2112 } else { 2113 ctsio->residual = 0; 2114 ctsio->kern_data_len = alloc_len; 2115 ctsio->kern_total_len = alloc_len; 2116 } 2117 ctsio->kern_data_resid = 0; 2118 ctsio->kern_rel_offset = 0; 2119 ctsio->kern_sg_entries = 0; 2120 2121 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2122 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2123 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2124 sizeof(struct scsi_vpd_id_t10) + devid_len); 2125 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2126 lun_name_len); 2127 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2128 wwnn_len); 2129 desc4 = (struct scsi_vpd_id_descriptor *)(&desc3->identifier[0] + 2130 wwpn_len); 2131 desc5 = (struct scsi_vpd_id_descriptor *)(&desc4->identifier[0] + 2132 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2133 2134 if (lun != NULL) 2135 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2136 lun->be_lun->lun_type; 2137 else 2138 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2139 2140 devid_ptr->page_code = SVPD_DEVICE_ID; 2141 2142 scsi_ulto2b(data_len - 4, devid_ptr->length); 2143 2144 /* 2145 * We're using a LUN association here. i.e., this device ID is a 2146 * per-LUN identifier. 2147 */ 2148 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2149 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2150 desc->length = sizeof(*t10id) + devid_len; 2151 if (lun == NULL || (val = ctl_get_opt(lun->be_lun, "vendor")) == NULL) { 2152 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2153 } else { 2154 memset(t10id->vendor, ' ', sizeof(t10id->vendor)); 2155 strncpy(t10id->vendor, val, 2156 min(sizeof(t10id->vendor), strlen(val))); 2157 } 2158 2159 /* 2160 * If we've actually got a backend, copy the device id from the 2161 * per-LUN data. Otherwise, set it to all spaces. 2162 */ 2163 if (lun != NULL) { 2164 /* 2165 * Copy the backend's LUN ID. 2166 */ 2167 strncpy((char *)t10id->vendor_spec_id, 2168 (char *)lun->be_lun->device_id, devid_len); 2169 } else { 2170 /* 2171 * No backend, set this to spaces. 2172 */ 2173 memset(t10id->vendor_spec_id, 0x20, devid_len); 2174 } 2175 2176 /* 2177 * desc1 is for the unique LUN name. 2178 * 2179 * XXX: According to SPC-3, LUN must report the same ID through 2180 * all the ports. The code below, however, reports the 2181 * ID only via iSCSI. 2182 */ 2183 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2184 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | 2185 SVPD_ID_TYPE_SCSI_NAME; 2186 desc1->length = lun_name_len; 2187 if (lun != NULL) { 2188 /* 2189 * Find the per-target LUN number. 2190 */ 2191 for (i = 0; i < CTL_MAX_LUNS; i++) { 2192 if (cs->cs_target->ct_luns[i] == lun->lun) 2193 break; 2194 } 2195 KASSERT(i < CTL_MAX_LUNS, 2196 ("lun %jd not found", (uintmax_t)lun->lun)); 2197 ret = snprintf(desc1->identifier, lun_name_len, "%s,lun,%d", 2198 cs->cs_target->ct_name, i); 2199 KASSERT(ret > 0 && ret <= lun_name_len, ("bad snprintf")); 2200 } else { 2201 KASSERT(lun_name_len == 0, ("no lun, but lun_name_len != 0")); 2202 } 2203 2204 /* 2205 * desc2 is for the Target Name. 2206 */ 2207 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2208 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2209 SVPD_ID_TYPE_SCSI_NAME; 2210 desc2->length = wwnn_len; 2211 snprintf(desc2->identifier, wwnn_len, "%s", cs->cs_target->ct_name); 2212 2213 /* 2214 * desc3 is for the WWPN which is a port asscociation. 2215 */ 2216 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2217 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2218 SVPD_ID_TYPE_SCSI_NAME; 2219 desc3->length = wwpn_len; 2220 snprintf(desc3->identifier, wwpn_len, "%s,t,0x%4.4x", 2221 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2222 2223 /* 2224 * desc3 is for the Relative Target Port(type 4h) identifier 2225 */ 2226 desc4->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2227 desc4->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2228 SVPD_ID_TYPE_RELTARG; 2229 desc4->length = 4; 2230 desc4->identifier[3] = 1; 2231 2232 /* 2233 * desc4 is for the Target Port Group(type 5h) identifier 2234 */ 2235 desc5->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2236 desc5->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2237 SVPD_ID_TYPE_TPORTGRP; 2238 desc5->length = 4; 2239 desc5->identifier[3] = 1; 2240 2241 ctsio->scsi_status = SCSI_STATUS_OK; 2242 2243 ctsio->be_move_done = ctl_config_move_done; 2244 ctl_datamove((union ctl_io *)ctsio); 2245 2246 return (CTL_RETVAL_COMPLETE); 2247} 2248 2249static void 2250cfiscsi_target_hold(struct cfiscsi_target *ct) 2251{ 2252 2253 refcount_acquire(&ct->ct_refcount); 2254} 2255 2256static void 2257cfiscsi_target_release(struct cfiscsi_target *ct) 2258{ 2259 struct cfiscsi_softc *softc; 2260 2261 softc = ct->ct_softc; 2262 mtx_lock(&softc->lock); 2263 if (refcount_release(&ct->ct_refcount)) { 2264 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2265 mtx_unlock(&softc->lock); 2266 free(ct, M_CFISCSI); 2267 2268 return; 2269 } 2270 mtx_unlock(&softc->lock); 2271} 2272 2273static struct cfiscsi_target * 2274cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2275{ 2276 struct cfiscsi_target *ct; 2277 2278 mtx_lock(&softc->lock); 2279 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2280 if (strcmp(name, ct->ct_name) != 0) 2281 continue; 2282 cfiscsi_target_hold(ct); 2283 mtx_unlock(&softc->lock); 2284 return (ct); 2285 } 2286 mtx_unlock(&softc->lock); 2287 2288 return (NULL); 2289} 2290 2291static struct cfiscsi_target * 2292cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2293 const char *alias) 2294{ 2295 struct cfiscsi_target *ct, *newct; 2296 int i; 2297 2298 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2299 return (NULL); 2300 2301 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2302 2303 mtx_lock(&softc->lock); 2304 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2305 if (strcmp(name, ct->ct_name) != 0) 2306 continue; 2307 cfiscsi_target_hold(ct); 2308 mtx_unlock(&softc->lock); 2309 free(newct, M_CFISCSI); 2310 return (ct); 2311 } 2312 2313 for (i = 0; i < CTL_MAX_LUNS; i++) 2314 newct->ct_luns[i] = -1; 2315 2316 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2317 if (alias != NULL) 2318 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2319 refcount_init(&newct->ct_refcount, 1); 2320 newct->ct_softc = softc; 2321 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2322 mtx_unlock(&softc->lock); 2323 2324 return (newct); 2325} 2326 2327/* 2328 * Takes LUN from the target space and returns LUN from the CTL space. 2329 */ 2330static uint32_t 2331cfiscsi_map_lun(void *arg, uint32_t lun) 2332{ 2333 struct cfiscsi_session *cs; 2334 2335 cs = arg; 2336 2337 if (lun >= CTL_MAX_LUNS) { 2338 CFISCSI_DEBUG("requested lun number %d is higher " 2339 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2340 return (0xffffffff); 2341 } 2342 2343 if (cs->cs_target->ct_luns[lun] < 0) 2344 return (0xffffffff); 2345 2346 return (cs->cs_target->ct_luns[lun]); 2347} 2348 2349static int 2350cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2351 unsigned long lun_id, unsigned long ctl_lun_id) 2352{ 2353 2354 if (lun_id >= CTL_MAX_LUNS) { 2355 CFISCSI_WARN("requested lun number %ld is higher " 2356 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2357 return (-1); 2358 } 2359 2360 if (ct->ct_luns[lun_id] >= 0) { 2361 /* 2362 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2363 * when the LUN is created, and a second time just before 2364 * the port is brought online; don't emit warnings 2365 * for that case. 2366 */ 2367 if (ct->ct_luns[lun_id] == ctl_lun_id) 2368 return (0); 2369 CFISCSI_WARN("lun %ld already allocated", lun_id); 2370 return (-1); 2371 } 2372 2373#if 0 2374 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2375 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2376#endif 2377 2378 ct->ct_luns[lun_id] = ctl_lun_id; 2379 cfiscsi_target_hold(ct); 2380 2381 return (0); 2382} 2383 2384static int 2385cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2386{ 2387 2388 if (ct->ct_luns[lun_id] < 0) { 2389 CFISCSI_WARN("lun %ld not allocated", lun_id); 2390 return (-1); 2391 } 2392 2393 ct->ct_luns[lun_id] = -1; 2394 cfiscsi_target_release(ct); 2395 2396 return (0); 2397} 2398 2399static int 2400cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2401{ 2402 struct cfiscsi_softc *softc; 2403 struct cfiscsi_target *ct; 2404 const char *target = NULL, *target_alias = NULL; 2405 const char *lun = NULL; 2406 unsigned long tmp; 2407 2408 softc = (struct cfiscsi_softc *)arg; 2409 2410 target = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun, 2411 "cfiscsi_target"); 2412 target_alias = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun, 2413 "cfiscsi_target)alias"); 2414 lun = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun, 2415 "cfiscsi_lun"); 2416 2417 if (target == NULL && lun == NULL) 2418 return (0); 2419 2420 if (target == NULL || lun == NULL) { 2421 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2422 "cfiscsi_lun, or the other way around; ignoring"); 2423 return (0); 2424 } 2425 2426 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2427 if (ct == NULL) { 2428 CFISCSI_WARN("failed to create target \"%s\"", target); 2429 return (0); 2430 } 2431 2432 tmp = strtoul(lun, NULL, 10); 2433 cfiscsi_target_set_lun(ct, tmp, lun_id); 2434 cfiscsi_target_release(ct); 2435 return (0); 2436} 2437 2438static int 2439cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2440{ 2441 struct cfiscsi_softc *softc; 2442 struct cfiscsi_target *ct; 2443 int i; 2444 2445 softc = (struct cfiscsi_softc *)arg; 2446 2447 mtx_lock(&softc->lock); 2448 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2449 for (i = 0; i < CTL_MAX_LUNS; i++) { 2450 if (ct->ct_luns[i] < 0) 2451 continue; 2452 if (ct->ct_luns[i] != lun_id) 2453 continue; 2454 mtx_unlock(&softc->lock); 2455 cfiscsi_target_unset_lun(ct, i); 2456 return (0); 2457 } 2458 } 2459 mtx_unlock(&softc->lock); 2460 return (0); 2461} 2462 2463static void 2464cfiscsi_datamove_in(union ctl_io *io) 2465{ 2466 struct cfiscsi_session *cs; 2467 struct icl_pdu *request, *response; 2468 const struct iscsi_bhs_scsi_command *bhssc; 2469 struct iscsi_bhs_data_in *bhsdi; 2470 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2471 size_t len, expected_len, sg_len, buffer_offset; 2472 const char *sg_addr; 2473 int ctl_sg_count, error, i; 2474 2475 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2476 cs = PDU_SESSION(request); 2477 2478 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2479 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2480 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2481 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2482 2483 if (io->scsiio.kern_sg_entries > 0) { 2484 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2485 ctl_sg_count = io->scsiio.kern_sg_entries; 2486 } else { 2487 ctl_sglist = &ctl_sg_entry; 2488 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2489 ctl_sglist->len = io->scsiio.kern_data_len; 2490 ctl_sg_count = 1; 2491 } 2492 2493 /* 2494 * This is the total amount of data to be transferred within the current 2495 * SCSI command. We need to record it so that we can properly report 2496 * underflow/underflow. 2497 */ 2498 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2499 2500 /* 2501 * This is the offset within the current SCSI command; for the first 2502 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2503 * it will be the sum of lengths of previous ones. 2504 */ 2505 buffer_offset = io->scsiio.kern_rel_offset; 2506 2507 /* 2508 * This is the transfer length expected by the initiator. In theory, 2509 * it could be different from the correct amount of data from the SCSI 2510 * point of view, even if that doesn't make any sense. 2511 */ 2512 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2513#if 0 2514 if (expected_len != io->scsiio.kern_total_len) { 2515 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2516 "actual length %zd", expected_len, 2517 (size_t)io->scsiio.kern_total_len); 2518 } 2519#endif 2520 2521 if (buffer_offset >= expected_len) { 2522#if 0 2523 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2524 "already sent the expected len", buffer_offset); 2525#endif 2526 io->scsiio.be_move_done(io); 2527 return; 2528 } 2529 2530 i = 0; 2531 sg_addr = NULL; 2532 sg_len = 0; 2533 response = NULL; 2534 bhsdi = NULL; 2535 for (;;) { 2536 if (response == NULL) { 2537 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2538 if (response == NULL) { 2539 CFISCSI_SESSION_WARN(cs, "failed to " 2540 "allocate memory; dropping connection"); 2541 ctl_set_busy(&io->scsiio); 2542 io->scsiio.be_move_done(io); 2543 cfiscsi_session_terminate(cs); 2544 return; 2545 } 2546 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2547 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2548 bhsdi->bhsdi_initiator_task_tag = 2549 bhssc->bhssc_initiator_task_tag; 2550 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2551 PDU_EXPDATASN(request)++; 2552 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2553 } 2554 2555 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2556 if (sg_len == 0) { 2557 sg_addr = ctl_sglist[i].addr; 2558 sg_len = ctl_sglist[i].len; 2559 KASSERT(sg_len > 0, ("sg_len <= 0")); 2560 } 2561 2562 len = sg_len; 2563 2564 /* 2565 * Truncate to maximum data segment length. 2566 */ 2567 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2568 ("ip_data_len %zd >= max_data_segment_length %zd", 2569 response->ip_data_len, cs->cs_max_data_segment_length)); 2570 if (response->ip_data_len + len > 2571 cs->cs_max_data_segment_length) { 2572 len = cs->cs_max_data_segment_length - 2573 response->ip_data_len; 2574 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2575 len, sg_len)); 2576 } 2577 2578 /* 2579 * Truncate to expected data transfer length. 2580 */ 2581 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2582 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2583 buffer_offset, response->ip_data_len, expected_len)); 2584 if (buffer_offset + response->ip_data_len + len > expected_len) { 2585 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2586 "to expected data transfer length %zd", 2587 buffer_offset + response->ip_data_len + len, expected_len); 2588 len = expected_len - (buffer_offset + response->ip_data_len); 2589 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2590 len, sg_len)); 2591 } 2592 2593 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2594 if (error != 0) { 2595 CFISCSI_SESSION_WARN(cs, "failed to " 2596 "allocate memory; dropping connection"); 2597 icl_pdu_free(response); 2598 ctl_set_busy(&io->scsiio); 2599 io->scsiio.be_move_done(io); 2600 cfiscsi_session_terminate(cs); 2601 return; 2602 } 2603 sg_addr += len; 2604 sg_len -= len; 2605 2606 KASSERT(buffer_offset + request->ip_data_len <= expected_len, 2607 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2608 buffer_offset, request->ip_data_len, expected_len)); 2609 if (buffer_offset + request->ip_data_len == expected_len) { 2610 /* 2611 * Already have the amount of data the initiator wanted. 2612 */ 2613 break; 2614 } 2615 2616 if (sg_len == 0) { 2617 /* 2618 * End of scatter-gather segment; 2619 * proceed to the next one... 2620 */ 2621 if (i == ctl_sg_count - 1) { 2622 /* 2623 * ... unless this was the last one. 2624 */ 2625 break; 2626 } 2627 i++; 2628 } 2629 2630 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2631 /* 2632 * Can't stuff more data into the current PDU; 2633 * queue it. Note that's not enough to check 2634 * for kern_data_resid == 0 instead; there 2635 * may be several Data-In PDUs for the final 2636 * call to cfiscsi_datamove(), and we want 2637 * to set the F flag only on the last of them. 2638 */ 2639 buffer_offset += response->ip_data_len; 2640 if (buffer_offset == io->scsiio.kern_total_len || 2641 buffer_offset == expected_len) 2642 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2643 cfiscsi_pdu_queue(response); 2644 response = NULL; 2645 bhsdi = NULL; 2646 } 2647 } 2648 if (response != NULL) { 2649 buffer_offset += response->ip_data_len; 2650 if (buffer_offset == io->scsiio.kern_total_len || 2651 buffer_offset == expected_len) 2652 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2653 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2654 cfiscsi_pdu_queue(response); 2655 } 2656 2657 io->scsiio.be_move_done(io); 2658} 2659 2660static void 2661cfiscsi_datamove_out(union ctl_io *io) 2662{ 2663 struct cfiscsi_session *cs; 2664 struct icl_pdu *request, *response; 2665 const struct iscsi_bhs_scsi_command *bhssc; 2666 struct iscsi_bhs_r2t *bhsr2t; 2667 struct cfiscsi_data_wait *cdw; 2668 uint32_t target_transfer_tag; 2669 bool done; 2670 2671 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2672 cs = PDU_SESSION(request); 2673 2674 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2675 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2676 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2677 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2678 2679 /* 2680 * We need to record it so that we can properly report 2681 * underflow/underflow. 2682 */ 2683 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2684 2685 /* 2686 * We hadn't received anything during this datamove yet. 2687 */ 2688 io->scsiio.ext_data_filled = 0; 2689 2690 target_transfer_tag = 2691 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2692 2693#if 0 2694 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2695 "task tag 0x%x, target transfer tag 0x%x", 2696 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2697#endif 2698 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2699 if (cdw == NULL) { 2700 CFISCSI_SESSION_WARN(cs, "failed to " 2701 "allocate memory; dropping connection"); 2702 ctl_set_busy(&io->scsiio); 2703 io->scsiio.be_move_done(io); 2704 cfiscsi_session_terminate(cs); 2705 return; 2706 } 2707 cdw->cdw_ctl_io = io; 2708 cdw->cdw_target_transfer_tag = target_transfer_tag; 2709 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2710 2711 if (cs->cs_immediate_data && io->scsiio.kern_rel_offset == 0 && 2712 icl_pdu_data_segment_length(request) > 0) { 2713 done = cfiscsi_handle_data_segment(request, cdw); 2714 if (done) { 2715 uma_zfree(cfiscsi_data_wait_zone, cdw); 2716 io->scsiio.be_move_done(io); 2717 return; 2718 } 2719 } 2720 2721 CFISCSI_SESSION_LOCK(cs); 2722 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2723 CFISCSI_SESSION_UNLOCK(cs); 2724 2725 /* 2726 * XXX: We should limit the number of outstanding R2T PDUs 2727 * per task to MaxOutstandingR2T. 2728 */ 2729 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2730 if (response == NULL) { 2731 CFISCSI_SESSION_WARN(cs, "failed to " 2732 "allocate memory; dropping connection"); 2733 ctl_set_busy(&io->scsiio); 2734 io->scsiio.be_move_done(io); 2735 cfiscsi_session_terminate(cs); 2736 return; 2737 } 2738 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2739 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2740 bhsr2t->bhsr2t_flags = 0x80; 2741 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2742 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2743 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2744 /* 2745 * XXX: Here we assume that cfiscsi_datamove() won't ever 2746 * be running concurrently on several CPUs for a given 2747 * command. 2748 */ 2749 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2750 PDU_R2TSN(request)++; 2751 /* 2752 * This is the offset within the current SCSI command; 2753 * i.e. for the first call of datamove(), it will be 0, 2754 * and for subsequent ones it will be the sum of lengths 2755 * of previous ones. 2756 * 2757 * The ext_data_filled is to account for unsolicited 2758 * (immediate) data that might have already arrived. 2759 */ 2760 bhsr2t->bhsr2t_buffer_offset = 2761 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2762 /* 2763 * This is the total length (sum of S/G lengths) this call 2764 * to cfiscsi_datamove() is supposed to handle. 2765 * 2766 * XXX: Limit it to MaxBurstLength. 2767 */ 2768 bhsr2t->bhsr2t_desired_data_transfer_length = 2769 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2770 cfiscsi_pdu_queue(response); 2771} 2772 2773static void 2774cfiscsi_datamove(union ctl_io *io) 2775{ 2776 2777 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2778 cfiscsi_datamove_in(io); 2779 else 2780 cfiscsi_datamove_out(io); 2781} 2782 2783static void 2784cfiscsi_scsi_command_done(union ctl_io *io) 2785{ 2786 struct icl_pdu *request, *response; 2787 struct iscsi_bhs_scsi_command *bhssc; 2788 struct iscsi_bhs_scsi_response *bhssr; 2789#ifdef DIAGNOSTIC 2790 struct cfiscsi_data_wait *cdw; 2791#endif 2792 struct cfiscsi_session *cs; 2793 uint16_t sense_length; 2794 2795 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2796 cs = PDU_SESSION(request); 2797 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2798 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2799 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2800 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2801 2802 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2803 // bhssc->bhssc_initiator_task_tag); 2804 2805#ifdef DIAGNOSTIC 2806 CFISCSI_SESSION_LOCK(cs); 2807 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2808 KASSERT(bhssc->bhssc_initiator_task_tag != 2809 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2810 CFISCSI_SESSION_UNLOCK(cs); 2811#endif 2812 2813 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2814 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2815 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2816 bhssr->bhssr_flags = 0x80; 2817 /* 2818 * XXX: We don't deal with bidirectional under/overflows; 2819 * does anything actually support those? 2820 */ 2821 if (PDU_TOTAL_TRANSFER_LEN(request) < 2822 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2823 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2824 bhssr->bhssr_residual_count = 2825 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2826 PDU_TOTAL_TRANSFER_LEN(request)); 2827 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2828 // ntohl(bhssr->bhssr_residual_count)); 2829 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2830 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2831 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2832 bhssr->bhssr_residual_count = 2833 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2834 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2835 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2836 // ntohl(bhssr->bhssr_residual_count)); 2837 } 2838 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2839 bhssr->bhssr_status = io->scsiio.scsi_status; 2840 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2841 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2842 2843 if (io->scsiio.sense_len > 0) { 2844#if 0 2845 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2846 io->scsiio.sense_len); 2847#endif 2848 sense_length = htons(io->scsiio.sense_len); 2849 icl_pdu_append_data(response, 2850 &sense_length, sizeof(sense_length), M_WAITOK); 2851 icl_pdu_append_data(response, 2852 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2853 } 2854 2855 ctl_free_io(io); 2856 icl_pdu_free(request); 2857 cfiscsi_pdu_queue(response); 2858} 2859 2860static void 2861cfiscsi_task_management_done(union ctl_io *io) 2862{ 2863 struct icl_pdu *request, *response; 2864 struct iscsi_bhs_task_management_request *bhstmr; 2865 struct iscsi_bhs_task_management_response *bhstmr2; 2866 struct cfiscsi_data_wait *cdw, *tmpcdw; 2867 struct cfiscsi_session *cs; 2868 2869 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2870 cs = PDU_SESSION(request); 2871 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2872 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2873 ISCSI_BHS_OPCODE_TASK_REQUEST, 2874 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2875 2876#if 0 2877 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2878 bhstmr->bhstmr_initiator_task_tag, 2879 bhstmr->bhstmr_referenced_task_tag); 2880#endif 2881 2882 if ((bhstmr->bhstmr_function & ~0x80) == 2883 BHSTMR_FUNCTION_ABORT_TASK) { 2884 /* 2885 * Make sure we no longer wait for Data-Out for this command. 2886 */ 2887 CFISCSI_SESSION_LOCK(cs); 2888 TAILQ_FOREACH_SAFE(cdw, 2889 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2890 if (bhstmr->bhstmr_referenced_task_tag != 2891 cdw->cdw_initiator_task_tag) 2892 continue; 2893 2894#if 0 2895 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2896 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2897#endif 2898 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2899 cdw, cdw_next); 2900 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2901 uma_zfree(cfiscsi_data_wait_zone, cdw); 2902 } 2903 CFISCSI_SESSION_UNLOCK(cs); 2904 } 2905 2906 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2907 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2908 response->ip_bhs; 2909 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2910 bhstmr2->bhstmr_flags = 0x80; 2911 if (io->io_hdr.status == CTL_SUCCESS) { 2912 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2913 } else { 2914 /* 2915 * XXX: How to figure out what exactly went wrong? iSCSI spec 2916 * expects us to provide detailed error, e.g. "Task does 2917 * not exist" or "LUN does not exist". 2918 */ 2919 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2920 bhstmr2->bhstmr_response = 2921 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2922 } 2923 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2924 2925 ctl_free_io(io); 2926 icl_pdu_free(request); 2927 cfiscsi_pdu_queue(response); 2928} 2929 2930static void 2931cfiscsi_done(union ctl_io *io) 2932{ 2933 struct icl_pdu *request; 2934 struct cfiscsi_session *cs; 2935 2936 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2937 ("invalid CTL status %#x", io->io_hdr.status)); 2938 2939 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2940 if (request == NULL) { 2941 /* 2942 * Implicit task termination has just completed; nothing to do. 2943 */ 2944 return; 2945 } 2946 2947 cs = PDU_SESSION(request); 2948 refcount_release(&cs->cs_outstanding_ctl_pdus); 2949 2950 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2951 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2952 cfiscsi_scsi_command_done(io); 2953 break; 2954 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2955 cfiscsi_task_management_done(io); 2956 break; 2957 default: 2958 panic("cfiscsi_done called with wrong opcode 0x%x", 2959 request->ip_bhs->bhs_opcode); 2960 } 2961} 2962