ctl_frontend_iscsi.c revision 267905
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 267905 2014-06-26 08:56:36Z 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 267905 2014-06-26 08:56:36Z 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 len = icl_pdu_data_segment_length(request); 741 742 /* 743 * Make sure the offset, as sent by the initiator, matches the offset 744 * we're supposed to be at in the scatter-gather list. 745 */ 746 if (buffer_offset > 747 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 748 buffer_offset + len <= 749 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 750 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 751 "expected %zd; dropping connection", buffer_offset, 752 (size_t)io->scsiio.kern_rel_offset + 753 (size_t)io->scsiio.ext_data_filled); 754 ctl_set_data_phase_error(&io->scsiio); 755 cfiscsi_session_terminate(cs); 756 return (true); 757 } 758 759 /* 760 * This is the offset within the PDU data segment, as opposed 761 * to buffer_offset, which is the offset within the task (SCSI 762 * command). 763 */ 764 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 765 buffer_offset; 766 767 /* 768 * Iterate over the scatter/gather segments, filling them with data 769 * from the PDU data segment. Note that this can get called multiple 770 * times for one SCSI command; the cdw structure holds state for the 771 * scatter/gather list. 772 */ 773 for (;;) { 774 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 775 ("cdw->cdw_sg_index >= ctl_sg_count")); 776 if (cdw->cdw_sg_len == 0) { 777 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 778 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 779 } 780 KASSERT(off <= len, ("len > off")); 781 copy_len = len - off; 782 if (copy_len > cdw->cdw_sg_len) 783 copy_len = cdw->cdw_sg_len; 784 785 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 786 cdw->cdw_sg_addr += copy_len; 787 cdw->cdw_sg_len -= copy_len; 788 off += copy_len; 789 io->scsiio.ext_data_filled += copy_len; 790 791 if (cdw->cdw_sg_len == 0) { 792 /* 793 * End of current segment. 794 */ 795 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 796 /* 797 * Last segment in scatter/gather list. 798 */ 799 break; 800 } 801 cdw->cdw_sg_index++; 802 } 803 804 if (off == len) { 805 /* 806 * End of PDU payload. 807 */ 808 break; 809 } 810 } 811 812 if (len > off) { 813 /* 814 * In case of unsolicited data, it's possible that the buffer 815 * provided by CTL is smaller than negotiated FirstBurstLength. 816 * Just ignore the superfluous data; will ask for them with R2T 817 * on next call to cfiscsi_datamove(). 818 * 819 * This obviously can only happen with SCSI Command PDU. 820 */ 821 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 822 ISCSI_BHS_OPCODE_SCSI_COMMAND) 823 return (true); 824 825 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 826 "expected %zd; dropping connection", 827 icl_pdu_data_segment_length(request), off); 828 ctl_set_data_phase_error(&io->scsiio); 829 cfiscsi_session_terminate(cs); 830 return (true); 831 } 832 833 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len && 834 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 835 CFISCSI_SESSION_WARN(cs, "got the final packet without " 836 "the F flag; flags = 0x%x; dropping connection", 837 bhsdo->bhsdo_flags); 838 ctl_set_data_phase_error(&io->scsiio); 839 cfiscsi_session_terminate(cs); 840 return (true); 841 } 842 843 if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len && 844 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 845 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 846 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 847 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 848 "transmitted size was %zd bytes instead of %d; " 849 "dropping connection", 850 (size_t)io->scsiio.ext_data_filled, 851 io->scsiio.kern_data_len); 852 ctl_set_data_phase_error(&io->scsiio); 853 cfiscsi_session_terminate(cs); 854 return (true); 855 } else { 856 /* 857 * For SCSI Command PDU, this just means we need to 858 * solicit more data by sending R2T. 859 */ 860 return (false); 861 } 862 } 863 864 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) { 865#if 0 866 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 867 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 868#endif 869 870 return (true); 871 } 872 873 return (false); 874} 875 876static void 877cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 878{ 879 struct iscsi_bhs_data_out *bhsdo; 880 struct cfiscsi_session *cs; 881 struct cfiscsi_data_wait *cdw = NULL; 882 union ctl_io *io; 883 bool done; 884 885 cs = PDU_SESSION(request); 886 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 887 888 CFISCSI_SESSION_LOCK(cs); 889 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 890#if 0 891 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 892 "ttt 0x%x, itt 0x%x", 893 bhsdo->bhsdo_target_transfer_tag, 894 bhsdo->bhsdo_initiator_task_tag, 895 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 896#endif 897 if (bhsdo->bhsdo_target_transfer_tag == 898 cdw->cdw_target_transfer_tag) 899 break; 900 } 901 CFISCSI_SESSION_UNLOCK(cs); 902 if (cdw == NULL) { 903 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 904 "0x%x, not found; dropping connection", 905 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 906 icl_pdu_free(request); 907 cfiscsi_session_terminate(cs); 908 return; 909 } 910 911 io = cdw->cdw_ctl_io; 912 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 913 ("CTL_FLAG_DATA_IN")); 914 915 done = cfiscsi_handle_data_segment(request, cdw); 916 if (done) { 917 CFISCSI_SESSION_LOCK(cs); 918 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 919 CFISCSI_SESSION_UNLOCK(cs); 920 uma_zfree(cfiscsi_data_wait_zone, cdw); 921 io->scsiio.be_move_done(io); 922 } 923 924 icl_pdu_free(request); 925} 926 927static void 928cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 929{ 930 struct iscsi_bhs_logout_request *bhslr; 931 struct iscsi_bhs_logout_response *bhslr2; 932 struct icl_pdu *response; 933 struct cfiscsi_session *cs; 934 935 cs = PDU_SESSION(request); 936 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 937 switch (bhslr->bhslr_reason & 0x7f) { 938 case BHSLR_REASON_CLOSE_SESSION: 939 case BHSLR_REASON_CLOSE_CONNECTION: 940 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 941 if (response == NULL) { 942 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 943 icl_pdu_free(request); 944 cfiscsi_session_terminate(cs); 945 return; 946 } 947 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 948 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 949 bhslr2->bhslr_flags = 0x80; 950 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 951 bhslr2->bhslr_initiator_task_tag = 952 bhslr->bhslr_initiator_task_tag; 953 icl_pdu_free(request); 954 cfiscsi_pdu_queue(response); 955 cfiscsi_session_terminate(cs); 956 break; 957 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 958 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 959 if (response == NULL) { 960 CFISCSI_SESSION_WARN(cs, 961 "failed to allocate memory; dropping connection"); 962 icl_pdu_free(request); 963 cfiscsi_session_terminate(cs); 964 return; 965 } 966 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 967 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 968 bhslr2->bhslr_flags = 0x80; 969 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 970 bhslr2->bhslr_initiator_task_tag = 971 bhslr->bhslr_initiator_task_tag; 972 icl_pdu_free(request); 973 cfiscsi_pdu_queue(response); 974 break; 975 default: 976 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 977 bhslr->bhslr_reason); 978 icl_pdu_free(request); 979 cfiscsi_session_terminate(cs); 980 break; 981 } 982} 983 984static void 985cfiscsi_callout(void *context) 986{ 987 struct icl_pdu *cp; 988 struct iscsi_bhs_nop_in *bhsni; 989 struct cfiscsi_session *cs; 990 991 cs = context; 992 993 if (cs->cs_terminating) 994 return; 995 996 callout_schedule(&cs->cs_callout, 1 * hz); 997 998 atomic_add_int(&cs->cs_timeout, 1); 999 1000#ifdef ICL_KERNEL_PROXY 1001 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1002 if (cs->cs_timeout > login_timeout) { 1003 CFISCSI_SESSION_WARN(cs, "login timed out after " 1004 "%d seconds; dropping connection", cs->cs_timeout); 1005 cfiscsi_session_terminate(cs); 1006 } 1007 return; 1008 } 1009#endif 1010 1011 if (cs->cs_timeout >= ping_timeout) { 1012 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1013 "dropping connection", ping_timeout); 1014 cfiscsi_session_terminate(cs); 1015 return; 1016 } 1017 1018 /* 1019 * If the ping was reset less than one second ago - which means 1020 * that we've received some PDU during the last second - assume 1021 * the traffic flows correctly and don't bother sending a NOP-Out. 1022 * 1023 * (It's 2 - one for one second, and one for incrementing is_timeout 1024 * earlier in this routine.) 1025 */ 1026 if (cs->cs_timeout < 2) 1027 return; 1028 1029 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1030 if (cp == NULL) { 1031 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1032 return; 1033 } 1034 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1035 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1036 bhsni->bhsni_flags = 0x80; 1037 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1038 1039 cfiscsi_pdu_queue(cp); 1040} 1041 1042static void 1043cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1044{ 1045 struct cfiscsi_data_wait *cdw, *tmpcdw; 1046 union ctl_io *io; 1047 int error, last; 1048 1049#ifdef notyet 1050 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1051 if (io == NULL) { 1052 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1053 return; 1054 } 1055 ctl_zero_io(io); 1056 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1057 io->io_hdr.io_type = CTL_IO_TASK; 1058 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1059 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1060 io->io_hdr.nexus.targ_target.id = 0; 1061 io->io_hdr.nexus.targ_lun = lun; 1062 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1063 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1064 error = ctl_queue(io); 1065 if (error != CTL_RETVAL_COMPLETE) { 1066 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1067 ctl_free_io(io); 1068 } 1069#else 1070 /* 1071 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1072 * just iterate over tasks that are waiting for something - data - and 1073 * terminate those. 1074 */ 1075 CFISCSI_SESSION_LOCK(cs); 1076 TAILQ_FOREACH_SAFE(cdw, 1077 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1078 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1079 if (io == NULL) { 1080 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1081 return; 1082 } 1083 ctl_zero_io(io); 1084 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1085 io->io_hdr.io_type = CTL_IO_TASK; 1086 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1087 io->io_hdr.nexus.targ_port = 1088 cs->cs_target->ct_softc->fe.targ_port; 1089 io->io_hdr.nexus.targ_target.id = 0; 1090 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1091 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1092 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1093 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1094 error = ctl_queue(io); 1095 if (error != CTL_RETVAL_COMPLETE) { 1096 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1097 ctl_free_io(io); 1098 return; 1099 } 1100#if 0 1101 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1102 "0x%x", cdw->cdw_initiator_task_tag); 1103#endif 1104 /* 1105 * Set nonzero port status; this prevents backends from 1106 * assuming that the data transfer actually succeeded 1107 * and writing uninitialized data to disk. 1108 */ 1109 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1110 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1111 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1112 uma_zfree(cfiscsi_data_wait_zone, cdw); 1113 } 1114 CFISCSI_SESSION_UNLOCK(cs); 1115#endif 1116 1117 /* 1118 * Wait for CTL to terminate all the tasks. 1119 */ 1120 for (;;) { 1121 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1122 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1123 if (last != 0) 1124 break; 1125 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, " 1126 "%d remaining", cs->cs_outstanding_ctl_pdus); 1127 pause("cfiscsi_terminate", 1); 1128 } 1129} 1130 1131static void 1132cfiscsi_maintenance_thread(void *arg) 1133{ 1134 struct cfiscsi_session *cs; 1135 1136 cs = arg; 1137 1138 for (;;) { 1139 CFISCSI_SESSION_LOCK(cs); 1140 if (cs->cs_terminating == false) 1141 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1142 CFISCSI_SESSION_UNLOCK(cs); 1143 1144 if (cs->cs_terminating) { 1145 1146 /* 1147 * We used to wait up to 30 seconds to deliver queued 1148 * PDUs to the initiator. We also tried hard to deliver 1149 * SCSI Responses for the aborted PDUs. We don't do 1150 * that anymore. We might need to revisit that. 1151 */ 1152 callout_drain(&cs->cs_callout); 1153 icl_conn_shutdown(cs->cs_conn); 1154 icl_conn_close(cs->cs_conn); 1155 1156 /* 1157 * At this point ICL receive thread is no longer 1158 * running; no new tasks can be queued. 1159 */ 1160 cfiscsi_session_terminate_tasks(cs); 1161 cfiscsi_session_delete(cs); 1162 kthread_exit(); 1163 return; 1164 } 1165 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1166 } 1167} 1168 1169static void 1170cfiscsi_session_terminate(struct cfiscsi_session *cs) 1171{ 1172 1173 if (cs->cs_terminating) 1174 return; 1175 cs->cs_terminating = true; 1176 cv_signal(&cs->cs_maintenance_cv); 1177#ifdef ICL_KERNEL_PROXY 1178 cv_signal(&cs->cs_login_cv); 1179#endif 1180} 1181 1182static int 1183cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1184{ 1185 int error, i; 1186 struct cfiscsi_softc *softc; 1187 1188 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1189 1190 softc = &cfiscsi_softc; 1191 1192 mtx_lock(&softc->lock); 1193 for (i = 0; i < softc->max_initiators; i++) { 1194 if (softc->ctl_initids[i] == 0) 1195 break; 1196 } 1197 if (i == softc->max_initiators) { 1198 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1199 softc->max_initiators); 1200 mtx_unlock(&softc->lock); 1201 return (1); 1202 } 1203 softc->ctl_initids[i] = 1; 1204 mtx_unlock(&softc->lock); 1205 1206#if 0 1207 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1208 i, softc->max_initiators); 1209#endif 1210 cs->cs_ctl_initid = i; 1211 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1212 if (error != 0) { 1213 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1214 mtx_lock(&softc->lock); 1215 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1216 mtx_unlock(&softc->lock); 1217 cs->cs_ctl_initid = -1; 1218 return (1); 1219 } 1220 1221 return (0); 1222} 1223 1224static void 1225cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1226{ 1227 int error; 1228 struct cfiscsi_softc *softc; 1229 1230 if (cs->cs_ctl_initid == -1) 1231 return; 1232 1233 softc = &cfiscsi_softc; 1234 1235 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1236 if (error != 0) { 1237 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1238 error); 1239 } 1240 mtx_lock(&softc->lock); 1241 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1242 mtx_unlock(&softc->lock); 1243 cs->cs_ctl_initid = -1; 1244} 1245 1246static struct cfiscsi_session * 1247cfiscsi_session_new(struct cfiscsi_softc *softc) 1248{ 1249 struct cfiscsi_session *cs; 1250 int error; 1251 1252 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1253 if (cs == NULL) { 1254 CFISCSI_WARN("malloc failed"); 1255 return (NULL); 1256 } 1257 cs->cs_ctl_initid = -1; 1258 1259 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1260 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1261 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1262 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1263#ifdef ICL_KERNEL_PROXY 1264 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1265#endif 1266 1267 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1268 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1269 cs->cs_conn->ic_error = cfiscsi_error_callback; 1270 cs->cs_conn->ic_prv0 = cs; 1271 1272 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1273 if (error != 0) { 1274 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1275 free(cs, M_CFISCSI); 1276 return (NULL); 1277 } 1278 1279 mtx_lock(&softc->lock); 1280 cs->cs_id = softc->last_session_id + 1; 1281 softc->last_session_id++; 1282 mtx_unlock(&softc->lock); 1283 1284 mtx_lock(&softc->lock); 1285 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1286 mtx_unlock(&softc->lock); 1287 1288 /* 1289 * Start pinging the initiator. 1290 */ 1291 callout_init(&cs->cs_callout, 1); 1292 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1293 1294 return (cs); 1295} 1296 1297static void 1298cfiscsi_session_delete(struct cfiscsi_session *cs) 1299{ 1300 struct cfiscsi_softc *softc; 1301 1302 softc = &cfiscsi_softc; 1303 1304 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1305 ("destroying session with outstanding CTL pdus")); 1306 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1307 ("destroying session with non-empty queue")); 1308 1309 cfiscsi_session_unregister_initiator(cs); 1310 if (cs->cs_target != NULL) 1311 cfiscsi_target_release(cs->cs_target); 1312 icl_conn_close(cs->cs_conn); 1313 icl_conn_free(cs->cs_conn); 1314 1315 mtx_lock(&softc->lock); 1316 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1317 mtx_unlock(&softc->lock); 1318 1319 free(cs, M_CFISCSI); 1320} 1321 1322int 1323cfiscsi_init(void) 1324{ 1325 struct cfiscsi_softc *softc; 1326 struct ctl_frontend *fe; 1327 int retval; 1328 1329 softc = &cfiscsi_softc; 1330 retval = 0; 1331 bzero(softc, sizeof(*softc)); 1332 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1333 1334#ifdef ICL_KERNEL_PROXY 1335 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1336#endif 1337 TAILQ_INIT(&softc->sessions); 1338 TAILQ_INIT(&softc->targets); 1339 1340 fe = &softc->fe; 1341 fe->port_type = CTL_PORT_ISCSI; 1342 /* XXX KDM what should the real number be here? */ 1343 fe->num_requested_ctl_io = 4096; 1344 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1345 fe->port_name = softc->port_name; 1346 fe->port_online = cfiscsi_online; 1347 fe->port_offline = cfiscsi_offline; 1348 fe->onoff_arg = softc; 1349 fe->targ_enable = cfiscsi_targ_enable; 1350 fe->targ_disable = cfiscsi_targ_disable; 1351 fe->lun_enable = cfiscsi_lun_enable; 1352 fe->lun_disable = cfiscsi_lun_disable; 1353 fe->targ_lun_arg = softc; 1354 fe->ioctl = cfiscsi_ioctl; 1355 fe->devid = cfiscsi_devid; 1356 fe->fe_datamove = cfiscsi_datamove; 1357 fe->fe_done = cfiscsi_done; 1358 1359 /* XXX KDM what should we report here? */ 1360 /* XXX These should probably be fetched from CTL. */ 1361 fe->max_targets = 1; 1362 fe->max_target_id = 15; 1363 1364 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1365 if (retval != 0) { 1366 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1367 retval); 1368 retval = 1; 1369 goto bailout; 1370 } 1371 1372 softc->max_initiators = fe->max_initiators; 1373 1374 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1375 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1376 UMA_ALIGN_PTR, 0); 1377 1378 return (0); 1379 1380bailout: 1381 return (retval); 1382} 1383 1384static int 1385cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1386{ 1387 1388 switch (what) { 1389 case MOD_LOAD: 1390 return (cfiscsi_init()); 1391 case MOD_UNLOAD: 1392 return (EBUSY); 1393 default: 1394 return (EOPNOTSUPP); 1395 } 1396} 1397 1398#ifdef ICL_KERNEL_PROXY 1399static void 1400cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1401{ 1402 struct cfiscsi_session *cs; 1403 1404 cs = cfiscsi_session_new(&cfiscsi_softc); 1405 if (cs == NULL) { 1406 CFISCSI_WARN("failed to create session"); 1407 return; 1408 } 1409 1410 icl_conn_handoff_sock(cs->cs_conn, so); 1411 cs->cs_initiator_sa = sa; 1412 cs->cs_portal_id = portal_id; 1413 cs->cs_waiting_for_ctld = true; 1414 cv_signal(&cfiscsi_softc.accept_cv); 1415} 1416#endif 1417 1418static void 1419cfiscsi_online(void *arg) 1420{ 1421 struct cfiscsi_softc *softc; 1422 1423 softc = (struct cfiscsi_softc *)arg; 1424 1425 softc->online = 1; 1426#ifdef ICL_KERNEL_PROXY 1427 if (softc->listener != NULL) 1428 icl_listen_free(softc->listener); 1429 softc->listener = icl_listen_new(cfiscsi_accept); 1430#endif 1431} 1432 1433static void 1434cfiscsi_offline(void *arg) 1435{ 1436 struct cfiscsi_softc *softc; 1437 struct cfiscsi_session *cs; 1438 1439 softc = (struct cfiscsi_softc *)arg; 1440 1441 softc->online = 0; 1442 1443 mtx_lock(&softc->lock); 1444 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1445 cfiscsi_session_terminate(cs); 1446 mtx_unlock(&softc->lock); 1447 1448#ifdef ICL_KERNEL_PROXY 1449 icl_listen_free(softc->listener); 1450 softc->listener = NULL; 1451#endif 1452} 1453 1454static int 1455cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1456{ 1457 1458 return (0); 1459} 1460 1461static int 1462cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1463{ 1464 1465 return (0); 1466} 1467 1468static void 1469cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1470{ 1471 struct cfiscsi_softc *softc; 1472 struct cfiscsi_session *cs; 1473 struct cfiscsi_target *ct; 1474 struct ctl_iscsi_handoff_params *cihp; 1475 int error; 1476 1477 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1478 softc = &cfiscsi_softc; 1479 1480 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1481 cihp->initiator_name, cihp->initiator_addr, 1482 cihp->target_name); 1483 1484 if (softc->online == 0) { 1485 ci->status = CTL_ISCSI_ERROR; 1486 snprintf(ci->error_str, sizeof(ci->error_str), 1487 "%s: port offline", __func__); 1488 return; 1489 } 1490 1491 ct = cfiscsi_target_find(softc, cihp->target_name); 1492 if (ct == NULL) { 1493 ci->status = CTL_ISCSI_ERROR; 1494 snprintf(ci->error_str, sizeof(ci->error_str), 1495 "%s: target not found", __func__); 1496 return; 1497 } 1498 1499#ifdef ICL_KERNEL_PROXY 1500 if (cihp->socket > 0 && cihp->connection_id > 0) { 1501 snprintf(ci->error_str, sizeof(ci->error_str), 1502 "both socket and connection_id set"); 1503 ci->status = CTL_ISCSI_ERROR; 1504 cfiscsi_target_release(ct); 1505 return; 1506 } 1507 if (cihp->socket == 0) { 1508 mtx_lock(&cfiscsi_softc.lock); 1509 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1510 if (cs->cs_id == cihp->socket) 1511 break; 1512 } 1513 if (cs == NULL) { 1514 mtx_unlock(&cfiscsi_softc.lock); 1515 snprintf(ci->error_str, sizeof(ci->error_str), 1516 "connection not found"); 1517 ci->status = CTL_ISCSI_ERROR; 1518 cfiscsi_target_release(ct); 1519 return; 1520 } 1521 mtx_unlock(&cfiscsi_softc.lock); 1522 } else { 1523#endif 1524 cs = cfiscsi_session_new(softc); 1525 if (cs == NULL) { 1526 ci->status = CTL_ISCSI_ERROR; 1527 snprintf(ci->error_str, sizeof(ci->error_str), 1528 "%s: cfiscsi_session_new failed", __func__); 1529 cfiscsi_target_release(ct); 1530 return; 1531 } 1532#ifdef ICL_KERNEL_PROXY 1533 } 1534#endif 1535 cs->cs_target = ct; 1536 1537 /* 1538 * First PDU of Full Feature phase has the same CmdSN as the last 1539 * PDU from the Login Phase received from the initiator. Thus, 1540 * the -1 below. 1541 */ 1542 cs->cs_portal_group_tag = cihp->portal_group_tag; 1543 cs->cs_cmdsn = cihp->cmdsn; 1544 cs->cs_statsn = cihp->statsn; 1545 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1546 cs->cs_max_burst_length = cihp->max_burst_length; 1547 cs->cs_immediate_data = !!cihp->immediate_data; 1548 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1549 cs->cs_conn->ic_header_crc32c = true; 1550 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1551 cs->cs_conn->ic_data_crc32c = true; 1552 1553 strlcpy(cs->cs_initiator_name, 1554 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1555 strlcpy(cs->cs_initiator_addr, 1556 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1557 strlcpy(cs->cs_initiator_alias, 1558 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1559 1560#ifdef ICL_KERNEL_PROXY 1561 if (cihp->socket > 0) { 1562#endif 1563 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1564 if (error != 0) { 1565 cfiscsi_session_delete(cs); 1566 ci->status = CTL_ISCSI_ERROR; 1567 snprintf(ci->error_str, sizeof(ci->error_str), 1568 "%s: icl_conn_handoff failed with error %d", 1569 __func__, error); 1570 return; 1571 } 1572#ifdef ICL_KERNEL_PROXY 1573 } 1574#endif 1575 1576 /* 1577 * Register initiator with CTL. 1578 */ 1579 cfiscsi_session_register_initiator(cs); 1580 1581#ifdef ICL_KERNEL_PROXY 1582 cs->cs_login_phase = false; 1583 1584 /* 1585 * First PDU of the Full Feature phase has likely already arrived. 1586 * We have to pick it up and execute properly. 1587 */ 1588 if (cs->cs_login_pdu != NULL) { 1589 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1590 cfiscsi_pdu_handle(cs->cs_login_pdu); 1591 cs->cs_login_pdu = NULL; 1592 } 1593#endif 1594 1595 ci->status = CTL_ISCSI_OK; 1596} 1597 1598static void 1599cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1600{ 1601 struct ctl_iscsi_list_params *cilp; 1602 struct cfiscsi_session *cs; 1603 struct cfiscsi_softc *softc; 1604 struct sbuf *sb; 1605 int error; 1606 1607 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1608 softc = &cfiscsi_softc; 1609 1610 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1611 if (sb == NULL) { 1612 ci->status = CTL_ISCSI_ERROR; 1613 snprintf(ci->error_str, sizeof(ci->error_str), 1614 "Unable to allocate %d bytes for iSCSI session list", 1615 cilp->alloc_len); 1616 return; 1617 } 1618 1619 sbuf_printf(sb, "<ctlislist>\n"); 1620 mtx_lock(&softc->lock); 1621 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1622#ifdef ICL_KERNEL_PROXY 1623 if (cs->cs_target == NULL) 1624 continue; 1625#endif 1626 error = sbuf_printf(sb, "<connection id=\"%d\">" 1627 "<initiator>%s</initiator>" 1628 "<initiator_addr>%s</initiator_addr>" 1629 "<initiator_alias>%s</initiator_alias>" 1630 "<target>%s</target>" 1631 "<target_alias>%s</target_alias>" 1632 "<header_digest>%s</header_digest>" 1633 "<data_digest>%s</data_digest>" 1634 "<max_data_segment_length>%zd</max_data_segment_length>" 1635 "<immediate_data>%d</immediate_data>" 1636 "<iser>%d</iser>" 1637 "</connection>\n", 1638 cs->cs_id, 1639 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1640 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1641 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1642 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1643 cs->cs_max_data_segment_length, 1644 cs->cs_immediate_data, 1645 cs->cs_conn->ic_iser); 1646 if (error != 0) 1647 break; 1648 } 1649 mtx_unlock(&softc->lock); 1650 error = sbuf_printf(sb, "</ctlislist>\n"); 1651 if (error != 0) { 1652 sbuf_delete(sb); 1653 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1654 snprintf(ci->error_str, sizeof(ci->error_str), 1655 "Out of space, %d bytes is too small", cilp->alloc_len); 1656 return; 1657 } 1658 sbuf_finish(sb); 1659 1660 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1661 cilp->fill_len = sbuf_len(sb) + 1; 1662 ci->status = CTL_ISCSI_OK; 1663 sbuf_delete(sb); 1664} 1665 1666static void 1667cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1668{ 1669 struct icl_pdu *response; 1670 struct iscsi_bhs_asynchronous_message *bhsam; 1671 struct ctl_iscsi_terminate_params *citp; 1672 struct cfiscsi_session *cs; 1673 struct cfiscsi_softc *softc; 1674 int found = 0; 1675 1676 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1677 softc = &cfiscsi_softc; 1678 1679 mtx_lock(&softc->lock); 1680 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1681 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1682 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1683 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1684 continue; 1685 1686 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1687 if (response == NULL) { 1688 /* 1689 * Oh well. Just terminate the connection. 1690 */ 1691 } else { 1692 bhsam = (struct iscsi_bhs_asynchronous_message *) 1693 response->ip_bhs; 1694 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1695 bhsam->bhsam_flags = 0x80; 1696 bhsam->bhsam_0xffffffff = 0xffffffff; 1697 bhsam->bhsam_async_event = 1698 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1699 cfiscsi_pdu_queue(response); 1700 } 1701 cfiscsi_session_terminate(cs); 1702 found++; 1703 } 1704 mtx_unlock(&softc->lock); 1705 1706 if (found == 0) { 1707 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1708 snprintf(ci->error_str, sizeof(ci->error_str), 1709 "No matching connections found"); 1710 return; 1711 } 1712 1713 ci->status = CTL_ISCSI_OK; 1714} 1715 1716static void 1717cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1718{ 1719 struct icl_pdu *response; 1720 struct iscsi_bhs_asynchronous_message *bhsam; 1721 struct ctl_iscsi_logout_params *cilp; 1722 struct cfiscsi_session *cs; 1723 struct cfiscsi_softc *softc; 1724 int found = 0; 1725 1726 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1727 softc = &cfiscsi_softc; 1728 1729 mtx_lock(&softc->lock); 1730 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1731 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1732 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1733 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1734 continue; 1735 1736 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1737 if (response == NULL) { 1738 ci->status = CTL_ISCSI_ERROR; 1739 snprintf(ci->error_str, sizeof(ci->error_str), 1740 "Unable to allocate memory"); 1741 mtx_unlock(&softc->lock); 1742 return; 1743 } 1744 bhsam = 1745 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1746 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1747 bhsam->bhsam_flags = 0x80; 1748 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1749 bhsam->bhsam_parameter3 = htons(10); 1750 cfiscsi_pdu_queue(response); 1751 found++; 1752 } 1753 mtx_unlock(&softc->lock); 1754 1755 if (found == 0) { 1756 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1757 snprintf(ci->error_str, sizeof(ci->error_str), 1758 "No matching connections found"); 1759 return; 1760 } 1761 1762 ci->status = CTL_ISCSI_OK; 1763} 1764 1765#ifdef ICL_KERNEL_PROXY 1766static void 1767cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1768{ 1769 struct ctl_iscsi_listen_params *cilp; 1770 struct sockaddr *sa; 1771 int error; 1772 1773 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1774 1775 if (cfiscsi_softc.listener == NULL) { 1776 CFISCSI_DEBUG("no listener"); 1777 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1778 ci->status = CTL_ISCSI_ERROR; 1779 return; 1780 } 1781 1782 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1783 if (error != 0) { 1784 CFISCSI_DEBUG("getsockaddr, error %d", error); 1785 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1786 ci->status = CTL_ISCSI_ERROR; 1787 return; 1788 } 1789 1790 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1791 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1792 if (error != 0) { 1793 free(sa, M_SONAME); 1794 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1795 snprintf(ci->error_str, sizeof(ci->error_str), 1796 "icl_listen_add failed, error %d", error); 1797 ci->status = CTL_ISCSI_ERROR; 1798 return; 1799 } 1800 1801 ci->status = CTL_ISCSI_OK; 1802} 1803 1804static void 1805cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1806{ 1807 struct ctl_iscsi_accept_params *ciap; 1808 struct cfiscsi_session *cs; 1809 int error; 1810 1811 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1812 1813 mtx_lock(&cfiscsi_softc.lock); 1814 for (;;) { 1815 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1816 if (cs->cs_waiting_for_ctld) 1817 break; 1818 } 1819 if (cs != NULL) 1820 break; 1821 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1822 if (error != 0) { 1823 mtx_unlock(&cfiscsi_softc.lock); 1824 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1825 ci->status = CTL_ISCSI_ERROR; 1826 return; 1827 } 1828 } 1829 mtx_unlock(&cfiscsi_softc.lock); 1830 1831 cs->cs_waiting_for_ctld = false; 1832 cs->cs_login_phase = true; 1833 1834 ciap->connection_id = cs->cs_id; 1835 ciap->portal_id = cs->cs_portal_id; 1836 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1837 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1838 cs->cs_initiator_sa->sa_len); 1839 if (error != 0) { 1840 snprintf(ci->error_str, sizeof(ci->error_str), 1841 "copyout failed with error %d", error); 1842 ci->status = CTL_ISCSI_ERROR; 1843 return; 1844 } 1845 1846 ci->status = CTL_ISCSI_OK; 1847} 1848 1849static void 1850cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1851{ 1852 struct ctl_iscsi_send_params *cisp; 1853 struct cfiscsi_session *cs; 1854 struct icl_pdu *ip; 1855 size_t datalen; 1856 void *data; 1857 int error; 1858 1859 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1860 1861 mtx_lock(&cfiscsi_softc.lock); 1862 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1863 if (cs->cs_id == cisp->connection_id) 1864 break; 1865 } 1866 if (cs == NULL) { 1867 mtx_unlock(&cfiscsi_softc.lock); 1868 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1869 ci->status = CTL_ISCSI_ERROR; 1870 return; 1871 } 1872 mtx_unlock(&cfiscsi_softc.lock); 1873 1874#if 0 1875 if (cs->cs_login_phase == false) 1876 return (EBUSY); 1877#endif 1878 1879 if (cs->cs_terminating) { 1880 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1881 ci->status = CTL_ISCSI_ERROR; 1882 return; 1883 } 1884 1885 datalen = cisp->data_segment_len; 1886 /* 1887 * XXX 1888 */ 1889 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1890 if (datalen > 65535) { 1891 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1892 ci->status = CTL_ISCSI_ERROR; 1893 return; 1894 } 1895 if (datalen > 0) { 1896 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1897 error = copyin(cisp->data_segment, data, datalen); 1898 if (error != 0) { 1899 free(data, M_CFISCSI); 1900 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1901 ci->status = CTL_ISCSI_ERROR; 1902 return; 1903 } 1904 } 1905 1906 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1907 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1908 if (datalen > 0) { 1909 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1910 free(data, M_CFISCSI); 1911 } 1912 CFISCSI_SESSION_LOCK(cs); 1913 icl_pdu_queue(ip); 1914 CFISCSI_SESSION_UNLOCK(cs); 1915 ci->status = CTL_ISCSI_OK; 1916} 1917 1918static void 1919cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1920{ 1921 struct ctl_iscsi_receive_params *cirp; 1922 struct cfiscsi_session *cs; 1923 struct icl_pdu *ip; 1924 void *data; 1925 int error; 1926 1927 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1928 1929 mtx_lock(&cfiscsi_softc.lock); 1930 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1931 if (cs->cs_id == cirp->connection_id) 1932 break; 1933 } 1934 if (cs == NULL) { 1935 mtx_unlock(&cfiscsi_softc.lock); 1936 snprintf(ci->error_str, sizeof(ci->error_str), 1937 "connection not found"); 1938 ci->status = CTL_ISCSI_ERROR; 1939 return; 1940 } 1941 mtx_unlock(&cfiscsi_softc.lock); 1942 1943#if 0 1944 if (is->is_login_phase == false) 1945 return (EBUSY); 1946#endif 1947 1948 CFISCSI_SESSION_LOCK(cs); 1949 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1950 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1951 if (error != 0) { 1952 CFISCSI_SESSION_UNLOCK(cs); 1953 snprintf(ci->error_str, sizeof(ci->error_str), 1954 "interrupted by signal"); 1955 ci->status = CTL_ISCSI_ERROR; 1956 return; 1957 } 1958 } 1959 1960 if (cs->cs_terminating) { 1961 CFISCSI_SESSION_UNLOCK(cs); 1962 snprintf(ci->error_str, sizeof(ci->error_str), 1963 "connection terminating"); 1964 ci->status = CTL_ISCSI_ERROR; 1965 return; 1966 } 1967 ip = cs->cs_login_pdu; 1968 cs->cs_login_pdu = NULL; 1969 CFISCSI_SESSION_UNLOCK(cs); 1970 1971 if (ip->ip_data_len > cirp->data_segment_len) { 1972 icl_pdu_free(ip); 1973 snprintf(ci->error_str, sizeof(ci->error_str), 1974 "data segment too big"); 1975 ci->status = CTL_ISCSI_ERROR; 1976 return; 1977 } 1978 1979 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1980 if (ip->ip_data_len > 0) { 1981 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1982 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1983 copyout(data, cirp->data_segment, ip->ip_data_len); 1984 free(data, M_CFISCSI); 1985 } 1986 1987 icl_pdu_free(ip); 1988 ci->status = CTL_ISCSI_OK; 1989} 1990 1991#endif /* !ICL_KERNEL_PROXY */ 1992 1993static int 1994cfiscsi_ioctl(struct cdev *dev, 1995 u_long cmd, caddr_t addr, int flag, struct thread *td) 1996{ 1997 struct ctl_iscsi *ci; 1998 1999 if (cmd != CTL_ISCSI) 2000 return (ENOTTY); 2001 2002 ci = (struct ctl_iscsi *)addr; 2003 switch (ci->type) { 2004 case CTL_ISCSI_HANDOFF: 2005 cfiscsi_ioctl_handoff(ci); 2006 break; 2007 case CTL_ISCSI_LIST: 2008 cfiscsi_ioctl_list(ci); 2009 break; 2010 case CTL_ISCSI_TERMINATE: 2011 cfiscsi_ioctl_terminate(ci); 2012 break; 2013 case CTL_ISCSI_LOGOUT: 2014 cfiscsi_ioctl_logout(ci); 2015 break; 2016#ifdef ICL_KERNEL_PROXY 2017 case CTL_ISCSI_LISTEN: 2018 cfiscsi_ioctl_listen(ci); 2019 break; 2020 case CTL_ISCSI_ACCEPT: 2021 cfiscsi_ioctl_accept(ci); 2022 break; 2023 case CTL_ISCSI_SEND: 2024 cfiscsi_ioctl_send(ci); 2025 break; 2026 case CTL_ISCSI_RECEIVE: 2027 cfiscsi_ioctl_receive(ci); 2028 break; 2029#else 2030 case CTL_ISCSI_LISTEN: 2031 case CTL_ISCSI_ACCEPT: 2032 case CTL_ISCSI_SEND: 2033 case CTL_ISCSI_RECEIVE: 2034 ci->status = CTL_ISCSI_ERROR; 2035 snprintf(ci->error_str, sizeof(ci->error_str), 2036 "%s: CTL compiled without ICL_KERNEL_PROXY", 2037 __func__); 2038 break; 2039#endif /* !ICL_KERNEL_PROXY */ 2040 default: 2041 ci->status = CTL_ISCSI_ERROR; 2042 snprintf(ci->error_str, sizeof(ci->error_str), 2043 "%s: invalid iSCSI request type %d", __func__, ci->type); 2044 break; 2045 } 2046 2047 return (0); 2048} 2049 2050static int 2051cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 2052{ 2053 struct cfiscsi_session *cs; 2054 struct scsi_vpd_device_id *devid_ptr; 2055 struct scsi_vpd_id_descriptor *desc, *desc1, *desc2, *desc3, *desc4; 2056 struct scsi_vpd_id_descriptor *desc5; 2057 struct scsi_vpd_id_t10 *t10id; 2058 struct ctl_lun *lun; 2059 const struct icl_pdu *request; 2060 int i, ret; 2061 char *val; 2062 size_t data_len, devid_len, wwnn_len, wwpn_len, lun_name_len; 2063 2064 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 2065 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2066 cs = PDU_SESSION(request); 2067 2068 wwpn_len = strlen(cs->cs_target->ct_name); 2069 wwpn_len += strlen(",t,0x0001"); 2070 wwpn_len += 1; /* '\0' */ 2071 if ((wwpn_len % 4) != 0) 2072 wwpn_len += (4 - (wwpn_len % 4)); 2073 2074 wwnn_len = strlen(cs->cs_target->ct_name); 2075 wwnn_len += 1; /* '\0' */ 2076 if ((wwnn_len % 4) != 0) 2077 wwnn_len += (4 - (wwnn_len % 4)); 2078 2079 if (lun == NULL) { 2080 devid_len = CTL_DEVID_MIN_LEN; 2081 lun_name_len = 0; 2082 } else { 2083 devid_len = max(CTL_DEVID_MIN_LEN, 2084 strnlen(lun->be_lun->device_id, CTL_DEVID_LEN)); 2085 lun_name_len = strlen(cs->cs_target->ct_name); 2086 lun_name_len += strlen(",lun,XXXXXXXX"); 2087 lun_name_len += 1; /* '\0' */ 2088 if ((lun_name_len % 4) != 0) 2089 lun_name_len += (4 - (lun_name_len % 4)); 2090 } 2091 2092 data_len = sizeof(struct scsi_vpd_device_id) + 2093 sizeof(struct scsi_vpd_id_descriptor) + 2094 sizeof(struct scsi_vpd_id_t10) + devid_len + 2095 sizeof(struct scsi_vpd_id_descriptor) + lun_name_len + 2096 sizeof(struct scsi_vpd_id_descriptor) + wwnn_len + 2097 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 2098 sizeof(struct scsi_vpd_id_descriptor) + 2099 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 2100 sizeof(struct scsi_vpd_id_descriptor) + 2101 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 2102 2103 ctsio->kern_data_ptr = malloc(data_len, M_CTL, M_WAITOK | M_ZERO); 2104 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 2105 ctsio->kern_sg_entries = 0; 2106 2107 if (data_len < alloc_len) { 2108 ctsio->residual = alloc_len - data_len; 2109 ctsio->kern_data_len = data_len; 2110 ctsio->kern_total_len = data_len; 2111 } else { 2112 ctsio->residual = 0; 2113 ctsio->kern_data_len = alloc_len; 2114 ctsio->kern_total_len = alloc_len; 2115 } 2116 ctsio->kern_data_resid = 0; 2117 ctsio->kern_rel_offset = 0; 2118 ctsio->kern_sg_entries = 0; 2119 2120 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2121 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2122 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2123 sizeof(struct scsi_vpd_id_t10) + devid_len); 2124 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2125 lun_name_len); 2126 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2127 wwnn_len); 2128 desc4 = (struct scsi_vpd_id_descriptor *)(&desc3->identifier[0] + 2129 wwpn_len); 2130 desc5 = (struct scsi_vpd_id_descriptor *)(&desc4->identifier[0] + 2131 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2132 2133 if (lun != NULL) 2134 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2135 lun->be_lun->lun_type; 2136 else 2137 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2138 2139 devid_ptr->page_code = SVPD_DEVICE_ID; 2140 2141 scsi_ulto2b(data_len - 4, devid_ptr->length); 2142 2143 /* 2144 * We're using a LUN association here. i.e., this device ID is a 2145 * per-LUN identifier. 2146 */ 2147 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2148 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2149 desc->length = sizeof(*t10id) + devid_len; 2150 if (lun == NULL || (val = ctl_get_opt(lun->be_lun, "vendor")) == NULL) { 2151 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2152 } else { 2153 memset(t10id->vendor, ' ', sizeof(t10id->vendor)); 2154 strncpy(t10id->vendor, val, 2155 min(sizeof(t10id->vendor), strlen(val))); 2156 } 2157 2158 /* 2159 * If we've actually got a backend, copy the device id from the 2160 * per-LUN data. Otherwise, set it to all spaces. 2161 */ 2162 if (lun != NULL) { 2163 /* 2164 * Copy the backend's LUN ID. 2165 */ 2166 strncpy((char *)t10id->vendor_spec_id, 2167 (char *)lun->be_lun->device_id, devid_len); 2168 } else { 2169 /* 2170 * No backend, set this to spaces. 2171 */ 2172 memset(t10id->vendor_spec_id, 0x20, devid_len); 2173 } 2174 2175 /* 2176 * desc1 is for the unique LUN name. 2177 * 2178 * XXX: According to SPC-3, LUN must report the same ID through 2179 * all the ports. The code below, however, reports the 2180 * ID only via iSCSI. 2181 */ 2182 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2183 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | 2184 SVPD_ID_TYPE_SCSI_NAME; 2185 desc1->length = lun_name_len; 2186 if (lun != NULL) { 2187 /* 2188 * Find the per-target LUN number. 2189 */ 2190 for (i = 0; i < CTL_MAX_LUNS; i++) { 2191 if (cs->cs_target->ct_luns[i] == lun->lun) 2192 break; 2193 } 2194 KASSERT(i < CTL_MAX_LUNS, 2195 ("lun %jd not found", (uintmax_t)lun->lun)); 2196 ret = snprintf(desc1->identifier, lun_name_len, "%s,lun,%d", 2197 cs->cs_target->ct_name, i); 2198 KASSERT(ret > 0 && ret <= lun_name_len, ("bad snprintf")); 2199 } else { 2200 KASSERT(lun_name_len == 0, ("no lun, but lun_name_len != 0")); 2201 } 2202 2203 /* 2204 * desc2 is for the Target Name. 2205 */ 2206 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2207 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2208 SVPD_ID_TYPE_SCSI_NAME; 2209 desc2->length = wwnn_len; 2210 snprintf(desc2->identifier, wwnn_len, "%s", cs->cs_target->ct_name); 2211 2212 /* 2213 * desc3 is for the WWPN which is a port asscociation. 2214 */ 2215 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2216 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2217 SVPD_ID_TYPE_SCSI_NAME; 2218 desc3->length = wwpn_len; 2219 snprintf(desc3->identifier, wwpn_len, "%s,t,0x%4.4x", 2220 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2221 2222 /* 2223 * desc3 is for the Relative Target Port(type 4h) identifier 2224 */ 2225 desc4->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2226 desc4->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2227 SVPD_ID_TYPE_RELTARG; 2228 desc4->length = 4; 2229 desc4->identifier[3] = 1; 2230 2231 /* 2232 * desc4 is for the Target Port Group(type 5h) identifier 2233 */ 2234 desc5->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2235 desc5->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2236 SVPD_ID_TYPE_TPORTGRP; 2237 desc5->length = 4; 2238 desc5->identifier[3] = 1; 2239 2240 ctsio->scsi_status = SCSI_STATUS_OK; 2241 2242 ctsio->io_hdr.flags |= CTL_FLAG_ALLOCATED; 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 < 2712 icl_pdu_data_segment_length(request)) { 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