ctl_frontend_iscsi.c revision 275203
1/*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 275203 2014-11-28 08:56:37Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 275203 2014-11-28 08:56:37Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capability.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include <dev/iscsi/icl.h> 71#include <dev/iscsi/iscsi_proto.h> 72#include <cam/ctl/ctl_frontend_iscsi.h> 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 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_info(void *arg, struct sbuf *sb); 153static int cfiscsi_lun_enable(void *arg, 154 struct ctl_id target_id, int lun_id); 155static int cfiscsi_lun_disable(void *arg, 156 struct ctl_id target_id, int lun_id); 157static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 158static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160static void cfiscsi_datamove(union ctl_io *io); 161static void cfiscsi_datamove_in(union ctl_io *io); 162static void cfiscsi_datamove_out(union ctl_io *io); 163static void cfiscsi_done(union ctl_io *io); 164static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 165static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 168static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 169static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 170static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 171static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 172 *softc, const char *name); 173static struct cfiscsi_target *cfiscsi_target_find_or_create( 174 struct cfiscsi_softc *softc, const char *name, const char *alias); 175static void cfiscsi_target_release(struct cfiscsi_target *ct); 176static void cfiscsi_session_delete(struct cfiscsi_session *cs); 177 178static struct cfiscsi_softc cfiscsi_softc; 179extern struct ctl_softc *control_softc; 180 181static struct ctl_frontend cfiscsi_frontend = 182{ 183 .name = "iscsi", 184 .init = cfiscsi_init, 185 .ioctl = cfiscsi_ioctl, 186}; 187CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 188MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 189 190static struct icl_pdu * 191cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 192{ 193 194 return (icl_pdu_new_bhs(request->ip_conn, flags)); 195} 196 197static bool 198cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 199{ 200 const struct iscsi_bhs_scsi_command *bhssc; 201 struct cfiscsi_session *cs; 202 uint32_t cmdsn, expstatsn; 203 204 cs = PDU_SESSION(request); 205 206 /* 207 * Every incoming PDU - not just NOP-Out - resets the ping timer. 208 * The purpose of the timeout is to reset the connection when it stalls; 209 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 210 * in some queue. 211 * 212 * XXX: Locking? 213 */ 214 cs->cs_timeout = 0; 215 216 /* 217 * Data-Out PDUs don't contain CmdSN. 218 */ 219 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 220 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 221 return (false); 222 223 /* 224 * We're only using fields common for all the request 225 * (initiator -> target) PDUs. 226 */ 227 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 228 cmdsn = ntohl(bhssc->bhssc_cmdsn); 229 expstatsn = ntohl(bhssc->bhssc_expstatsn); 230 231 CFISCSI_SESSION_LOCK(cs); 232#if 0 233 if (expstatsn != cs->cs_statsn) { 234 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 235 "while current StatSN is %d", expstatsn, 236 cs->cs_statsn); 237 } 238#endif 239 240 /* 241 * The target MUST silently ignore any non-immediate command outside 242 * of this range. 243 */ 244 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 245 CFISCSI_SESSION_UNLOCK(cs); 246 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 247 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 248 return (true); 249 } 250 251 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 252 cs->cs_cmdsn++; 253 254 CFISCSI_SESSION_UNLOCK(cs); 255 256 return (false); 257} 258 259static void 260cfiscsi_pdu_handle(struct icl_pdu *request) 261{ 262 struct cfiscsi_session *cs; 263 bool ignore; 264 265 cs = PDU_SESSION(request); 266 267 ignore = cfiscsi_pdu_update_cmdsn(request); 268 if (ignore) { 269 icl_pdu_free(request); 270 return; 271 } 272 273 /* 274 * Handle the PDU; this includes e.g. receiving the remaining 275 * part of PDU and submitting the SCSI command to CTL 276 * or queueing a reply. The handling routine is responsible 277 * for freeing the PDU when it's no longer needed. 278 */ 279 switch (request->ip_bhs->bhs_opcode & 280 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 281 case ISCSI_BHS_OPCODE_NOP_OUT: 282 cfiscsi_pdu_handle_nop_out(request); 283 break; 284 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 285 cfiscsi_pdu_handle_scsi_command(request); 286 break; 287 case ISCSI_BHS_OPCODE_TASK_REQUEST: 288 cfiscsi_pdu_handle_task_request(request); 289 break; 290 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 291 cfiscsi_pdu_handle_data_out(request); 292 break; 293 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 294 cfiscsi_pdu_handle_logout_request(request); 295 break; 296 default: 297 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 298 "opcode 0x%x; dropping connection", 299 request->ip_bhs->bhs_opcode); 300 icl_pdu_free(request); 301 cfiscsi_session_terminate(cs); 302 } 303 304} 305 306static void 307cfiscsi_receive_callback(struct icl_pdu *request) 308{ 309 struct cfiscsi_session *cs; 310 311 cs = PDU_SESSION(request); 312 313#ifdef ICL_KERNEL_PROXY 314 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 315 if (cs->cs_login_pdu == NULL) 316 cs->cs_login_pdu = request; 317 else 318 icl_pdu_free(request); 319 cv_signal(&cs->cs_login_cv); 320 return; 321 } 322#endif 323 324 cfiscsi_pdu_handle(request); 325} 326 327static void 328cfiscsi_error_callback(struct icl_conn *ic) 329{ 330 struct cfiscsi_session *cs; 331 332 cs = CONN_SESSION(ic); 333 334 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 335 cfiscsi_session_terminate(cs); 336} 337 338static int 339cfiscsi_pdu_prepare(struct icl_pdu *response) 340{ 341 struct cfiscsi_session *cs; 342 struct iscsi_bhs_scsi_response *bhssr; 343 bool advance_statsn = true; 344 345 cs = PDU_SESSION(response); 346 347 CFISCSI_SESSION_LOCK_ASSERT(cs); 348 349 /* 350 * We're only using fields common for all the response 351 * (target -> initiator) PDUs. 352 */ 353 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 354 355 /* 356 * 10.8.3: "The StatSN for this connection is not advanced 357 * after this PDU is sent." 358 */ 359 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 360 advance_statsn = false; 361 362 /* 363 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 364 * StatSN for the connection is not advanced after this PDU is sent." 365 */ 366 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 367 bhssr->bhssr_initiator_task_tag == 0xffffffff) 368 advance_statsn = false; 369 370 /* 371 * See the comment below - StatSN is not meaningful and must 372 * not be advanced. 373 */ 374 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 375 advance_statsn = false; 376 377 /* 378 * 10.7.3: "The fields StatSN, Status, and Residual Count 379 * only have meaningful content if the S bit is set to 1." 380 */ 381 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 382 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 383 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 384 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 385 386 if (advance_statsn) 387 cs->cs_statsn++; 388 389 return (0); 390} 391 392static void 393cfiscsi_pdu_queue(struct icl_pdu *response) 394{ 395 struct cfiscsi_session *cs; 396 397 cs = PDU_SESSION(response); 398 399 CFISCSI_SESSION_LOCK(cs); 400 cfiscsi_pdu_prepare(response); 401 icl_pdu_queue(response); 402 CFISCSI_SESSION_UNLOCK(cs); 403} 404 405static uint32_t 406cfiscsi_decode_lun(uint64_t encoded) 407{ 408 uint8_t lun[8]; 409 uint32_t result; 410 411 /* 412 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 413 * but is in fact an evil, multidimensional structure defined 414 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 415 */ 416 memcpy(lun, &encoded, sizeof(lun)); 417 switch (lun[0] & 0xC0) { 418 case 0x00: 419 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 420 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 421 CFISCSI_WARN("malformed LUN " 422 "(peripheral device addressing method): 0x%jx", 423 (uintmax_t)encoded); 424 result = 0xffffffff; 425 break; 426 } 427 result = lun[1]; 428 break; 429 case 0x40: 430 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 431 lun[6] != 0 || lun[7] != 0) { 432 CFISCSI_WARN("malformed LUN " 433 "(flat address space addressing method): 0x%jx", 434 (uintmax_t)encoded); 435 result = 0xffffffff; 436 break; 437 } 438 result = ((lun[0] & 0x3f) << 8) + lun[1]; 439 break; 440 case 0xC0: 441 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 442 lun[6] != 0 || lun[7] != 0) { 443 CFISCSI_WARN("malformed LUN (extended flat " 444 "address space addressing method): 0x%jx", 445 (uintmax_t)encoded); 446 result = 0xffffffff; 447 break; 448 } 449 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 450 default: 451 CFISCSI_WARN("unsupported LUN format 0x%jx", 452 (uintmax_t)encoded); 453 result = 0xffffffff; 454 break; 455 } 456 457 return (result); 458} 459 460static void 461cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 462{ 463 struct cfiscsi_session *cs; 464 struct iscsi_bhs_nop_out *bhsno; 465 struct iscsi_bhs_nop_in *bhsni; 466 struct icl_pdu *response; 467 void *data = NULL; 468 size_t datasize; 469 int error; 470 471 cs = PDU_SESSION(request); 472 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 473 474 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 475 /* 476 * Nothing to do, iscsi_pdu_update_statsn() already 477 * zeroed the timeout. 478 */ 479 icl_pdu_free(request); 480 return; 481 } 482 483 datasize = icl_pdu_data_segment_length(request); 484 if (datasize > 0) { 485 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 486 if (data == NULL) { 487 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 488 "dropping connection"); 489 icl_pdu_free(request); 490 cfiscsi_session_terminate(cs); 491 return; 492 } 493 icl_pdu_get_data(request, 0, data, datasize); 494 } 495 496 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 497 if (response == NULL) { 498 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 499 "droppping connection"); 500 free(data, M_CFISCSI); 501 icl_pdu_free(request); 502 cfiscsi_session_terminate(cs); 503 return; 504 } 505 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 506 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 507 bhsni->bhsni_flags = 0x80; 508 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 509 bhsni->bhsni_target_transfer_tag = 0xffffffff; 510 if (datasize > 0) { 511 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 512 if (error != 0) { 513 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 514 "dropping connection"); 515 free(data, M_CFISCSI); 516 icl_pdu_free(request); 517 icl_pdu_free(response); 518 cfiscsi_session_terminate(cs); 519 return; 520 } 521 free(data, M_CFISCSI); 522 } 523 524 icl_pdu_free(request); 525 cfiscsi_pdu_queue(response); 526} 527 528static void 529cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 530{ 531 struct iscsi_bhs_scsi_command *bhssc; 532 struct cfiscsi_session *cs; 533 union ctl_io *io; 534 int error; 535 536 cs = PDU_SESSION(request); 537 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 538 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 539 // bhssc->bhssc_initiator_task_tag); 540 541 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 542 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 543 "ImmediateData=No; dropping connection"); 544 icl_pdu_free(request); 545 cfiscsi_session_terminate(cs); 546 return; 547 } 548 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 549 if (io == NULL) { 550 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 551 "dropping connection"); 552 icl_pdu_free(request); 553 cfiscsi_session_terminate(cs); 554 return; 555 } 556 ctl_zero_io(io); 557 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 558 io->io_hdr.io_type = CTL_IO_SCSI; 559 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 560 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 561 io->io_hdr.nexus.targ_target.id = 0; 562 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 563 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 564 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 565 case BHSSC_FLAGS_ATTR_UNTAGGED: 566 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 567 break; 568 case BHSSC_FLAGS_ATTR_SIMPLE: 569 io->scsiio.tag_type = CTL_TAG_SIMPLE; 570 break; 571 case BHSSC_FLAGS_ATTR_ORDERED: 572 io->scsiio.tag_type = CTL_TAG_ORDERED; 573 break; 574 case BHSSC_FLAGS_ATTR_HOQ: 575 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 576 break; 577 case BHSSC_FLAGS_ATTR_ACA: 578 io->scsiio.tag_type = CTL_TAG_ACA; 579 break; 580 default: 581 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 582 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 583 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 584 break; 585 } 586 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 587 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 588 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 589 error = ctl_queue(io); 590 if (error != CTL_RETVAL_COMPLETE) { 591 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 592 "dropping connection", error); 593 ctl_free_io(io); 594 refcount_release(&cs->cs_outstanding_ctl_pdus); 595 icl_pdu_free(request); 596 cfiscsi_session_terminate(cs); 597 } 598} 599 600static void 601cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 602{ 603 struct iscsi_bhs_task_management_request *bhstmr; 604 struct iscsi_bhs_task_management_response *bhstmr2; 605 struct icl_pdu *response; 606 struct cfiscsi_session *cs; 607 union ctl_io *io; 608 int error; 609 610 cs = PDU_SESSION(request); 611 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 612 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 613 if (io == NULL) { 614 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 615 "dropping connection"); 616 icl_pdu_free(request); 617 cfiscsi_session_terminate(cs); 618 return; 619 } 620 ctl_zero_io(io); 621 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 622 io->io_hdr.io_type = CTL_IO_TASK; 623 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 624 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 625 io->io_hdr.nexus.targ_target.id = 0; 626 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 627 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 628 629 switch (bhstmr->bhstmr_function & ~0x80) { 630 case BHSTMR_FUNCTION_ABORT_TASK: 631#if 0 632 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 633#endif 634 io->taskio.task_action = CTL_TASK_ABORT_TASK; 635 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 636 break; 637 case BHSTMR_FUNCTION_ABORT_TASK_SET: 638#if 0 639 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 640#endif 641 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 642 break; 643 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 644#if 0 645 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 646#endif 647 io->taskio.task_action = CTL_TASK_LUN_RESET; 648 break; 649 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 650#if 0 651 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 652#endif 653 io->taskio.task_action = CTL_TASK_TARGET_RESET; 654 break; 655 default: 656 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 657 bhstmr->bhstmr_function & ~0x80); 658 ctl_free_io(io); 659 660 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 661 if (response == NULL) { 662 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 663 "dropping connection"); 664 icl_pdu_free(request); 665 cfiscsi_session_terminate(cs); 666 return; 667 } 668 bhstmr2 = (struct iscsi_bhs_task_management_response *) 669 response->ip_bhs; 670 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 671 bhstmr2->bhstmr_flags = 0x80; 672 bhstmr2->bhstmr_response = 673 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 674 bhstmr2->bhstmr_initiator_task_tag = 675 bhstmr->bhstmr_initiator_task_tag; 676 icl_pdu_free(request); 677 cfiscsi_pdu_queue(response); 678 return; 679 } 680 681 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 682 error = ctl_queue(io); 683 if (error != CTL_RETVAL_COMPLETE) { 684 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 685 "dropping connection", error); 686 ctl_free_io(io); 687 refcount_release(&cs->cs_outstanding_ctl_pdus); 688 icl_pdu_free(request); 689 cfiscsi_session_terminate(cs); 690 } 691} 692 693static bool 694cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 695{ 696 struct iscsi_bhs_data_out *bhsdo; 697 struct cfiscsi_session *cs; 698 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 699 size_t copy_len, len, off, buffer_offset; 700 int ctl_sg_count; 701 union ctl_io *io; 702 703 cs = PDU_SESSION(request); 704 705 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 706 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 707 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 708 ISCSI_BHS_OPCODE_SCSI_COMMAND, 709 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 710 711 /* 712 * We're only using fields common for Data-Out and SCSI Command PDUs. 713 */ 714 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 715 716 io = cdw->cdw_ctl_io; 717 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 718 ("CTL_FLAG_DATA_IN")); 719 720#if 0 721 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 722 request->ip_data_len, io->scsiio.kern_total_len); 723#endif 724 725 if (io->scsiio.kern_sg_entries > 0) { 726 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 727 ctl_sg_count = io->scsiio.kern_sg_entries; 728 } else { 729 ctl_sglist = &ctl_sg_entry; 730 ctl_sglist->addr = io->scsiio.kern_data_ptr; 731 ctl_sglist->len = io->scsiio.kern_data_len; 732 ctl_sg_count = 1; 733 } 734 735 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 736 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 737 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 738 else 739 buffer_offset = 0; 740 len = icl_pdu_data_segment_length(request); 741 742 /* 743 * Make sure the offset, as sent by the initiator, matches the offset 744 * we're supposed to be at in the scatter-gather list. 745 */ 746 if (buffer_offset > 747 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 748 buffer_offset + len <= 749 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 750 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 751 "expected %zd; dropping connection", buffer_offset, 752 (size_t)io->scsiio.kern_rel_offset + 753 (size_t)io->scsiio.ext_data_filled); 754 ctl_set_data_phase_error(&io->scsiio); 755 cfiscsi_session_terminate(cs); 756 return (true); 757 } 758 759 /* 760 * This is the offset within the PDU data segment, as opposed 761 * to buffer_offset, which is the offset within the task (SCSI 762 * command). 763 */ 764 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 765 buffer_offset; 766 767 /* 768 * Iterate over the scatter/gather segments, filling them with data 769 * from the PDU data segment. Note that this can get called multiple 770 * times for one SCSI command; the cdw structure holds state for the 771 * scatter/gather list. 772 */ 773 for (;;) { 774 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 775 ("cdw->cdw_sg_index >= ctl_sg_count")); 776 if (cdw->cdw_sg_len == 0) { 777 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 778 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 779 } 780 KASSERT(off <= len, ("len > off")); 781 copy_len = len - off; 782 if (copy_len > cdw->cdw_sg_len) 783 copy_len = cdw->cdw_sg_len; 784 785 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 786 cdw->cdw_sg_addr += copy_len; 787 cdw->cdw_sg_len -= copy_len; 788 off += copy_len; 789 io->scsiio.ext_data_filled += copy_len; 790 791 if (cdw->cdw_sg_len == 0) { 792 /* 793 * End of current segment. 794 */ 795 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 796 /* 797 * Last segment in scatter/gather list. 798 */ 799 break; 800 } 801 cdw->cdw_sg_index++; 802 } 803 804 if (off == len) { 805 /* 806 * End of PDU payload. 807 */ 808 break; 809 } 810 } 811 812 if (len > off) { 813 /* 814 * In case of unsolicited data, it's possible that the buffer 815 * provided by CTL is smaller than negotiated FirstBurstLength. 816 * Just ignore the superfluous data; will ask for them with R2T 817 * on next call to cfiscsi_datamove(). 818 * 819 * This obviously can only happen with SCSI Command PDU. 820 */ 821 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 822 ISCSI_BHS_OPCODE_SCSI_COMMAND) 823 return (true); 824 825 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 826 "expected %zd; dropping connection", 827 icl_pdu_data_segment_length(request), off); 828 ctl_set_data_phase_error(&io->scsiio); 829 cfiscsi_session_terminate(cs); 830 return (true); 831 } 832 833 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 834 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 835 CFISCSI_SESSION_WARN(cs, "got the final packet without " 836 "the F flag; flags = 0x%x; dropping connection", 837 bhsdo->bhsdo_flags); 838 ctl_set_data_phase_error(&io->scsiio); 839 cfiscsi_session_terminate(cs); 840 return (true); 841 } 842 843 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 844 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 845 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 846 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 847 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 848 "transmitted size was %zd bytes instead of %d; " 849 "dropping connection", 850 (size_t)io->scsiio.ext_data_filled, 851 cdw->cdw_r2t_end); 852 ctl_set_data_phase_error(&io->scsiio); 853 cfiscsi_session_terminate(cs); 854 return (true); 855 } else { 856 /* 857 * For SCSI Command PDU, this just means we need to 858 * solicit more data by sending R2T. 859 */ 860 return (false); 861 } 862 } 863 864 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 865#if 0 866 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 867 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 868#endif 869 870 return (true); 871 } 872 873 return (false); 874} 875 876static void 877cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 878{ 879 struct iscsi_bhs_data_out *bhsdo; 880 struct cfiscsi_session *cs; 881 struct cfiscsi_data_wait *cdw = NULL; 882 union ctl_io *io; 883 bool done; 884 885 cs = PDU_SESSION(request); 886 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 887 888 CFISCSI_SESSION_LOCK(cs); 889 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 890#if 0 891 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 892 "ttt 0x%x, itt 0x%x", 893 bhsdo->bhsdo_target_transfer_tag, 894 bhsdo->bhsdo_initiator_task_tag, 895 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 896#endif 897 if (bhsdo->bhsdo_target_transfer_tag == 898 cdw->cdw_target_transfer_tag) 899 break; 900 } 901 CFISCSI_SESSION_UNLOCK(cs); 902 if (cdw == NULL) { 903 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 904 "0x%x, not found; dropping connection", 905 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 906 icl_pdu_free(request); 907 cfiscsi_session_terminate(cs); 908 return; 909 } 910 911 io = cdw->cdw_ctl_io; 912 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 913 ("CTL_FLAG_DATA_IN")); 914 915 done = cfiscsi_handle_data_segment(request, cdw); 916 if (done) { 917 CFISCSI_SESSION_LOCK(cs); 918 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 919 CFISCSI_SESSION_UNLOCK(cs); 920 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 921 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 922 uma_zfree(cfiscsi_data_wait_zone, cdw); 923 if (done) 924 io->scsiio.be_move_done(io); 925 else 926 cfiscsi_datamove_out(io); 927 } 928 929 icl_pdu_free(request); 930} 931 932static void 933cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 934{ 935 struct iscsi_bhs_logout_request *bhslr; 936 struct iscsi_bhs_logout_response *bhslr2; 937 struct icl_pdu *response; 938 struct cfiscsi_session *cs; 939 940 cs = PDU_SESSION(request); 941 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 942 switch (bhslr->bhslr_reason & 0x7f) { 943 case BHSLR_REASON_CLOSE_SESSION: 944 case BHSLR_REASON_CLOSE_CONNECTION: 945 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 946 if (response == NULL) { 947 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 948 icl_pdu_free(request); 949 cfiscsi_session_terminate(cs); 950 return; 951 } 952 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 953 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 954 bhslr2->bhslr_flags = 0x80; 955 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 956 bhslr2->bhslr_initiator_task_tag = 957 bhslr->bhslr_initiator_task_tag; 958 icl_pdu_free(request); 959 cfiscsi_pdu_queue(response); 960 cfiscsi_session_terminate(cs); 961 break; 962 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 963 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 964 if (response == NULL) { 965 CFISCSI_SESSION_WARN(cs, 966 "failed to allocate memory; dropping connection"); 967 icl_pdu_free(request); 968 cfiscsi_session_terminate(cs); 969 return; 970 } 971 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 972 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 973 bhslr2->bhslr_flags = 0x80; 974 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 975 bhslr2->bhslr_initiator_task_tag = 976 bhslr->bhslr_initiator_task_tag; 977 icl_pdu_free(request); 978 cfiscsi_pdu_queue(response); 979 break; 980 default: 981 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 982 bhslr->bhslr_reason); 983 icl_pdu_free(request); 984 cfiscsi_session_terminate(cs); 985 break; 986 } 987} 988 989static void 990cfiscsi_callout(void *context) 991{ 992 struct icl_pdu *cp; 993 struct iscsi_bhs_nop_in *bhsni; 994 struct cfiscsi_session *cs; 995 996 cs = context; 997 998 if (cs->cs_terminating) 999 return; 1000 1001 callout_schedule(&cs->cs_callout, 1 * hz); 1002 1003 atomic_add_int(&cs->cs_timeout, 1); 1004 1005#ifdef ICL_KERNEL_PROXY 1006 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1007 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1008 CFISCSI_SESSION_WARN(cs, "login timed out after " 1009 "%d seconds; dropping connection", cs->cs_timeout); 1010 cfiscsi_session_terminate(cs); 1011 } 1012 return; 1013 } 1014#endif 1015 1016 if (ping_timeout <= 0) { 1017 /* 1018 * Pings are disabled. Don't send NOP-In in this case; 1019 * user might have disabled pings to work around problems 1020 * with certain initiators that can't properly handle 1021 * NOP-In, such as iPXE. Reset the timeout, to avoid 1022 * triggering reconnection, should the user decide to 1023 * reenable them. 1024 */ 1025 cs->cs_timeout = 0; 1026 return; 1027 } 1028 1029 if (cs->cs_timeout >= ping_timeout) { 1030 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1031 "dropping connection", ping_timeout); 1032 cfiscsi_session_terminate(cs); 1033 return; 1034 } 1035 1036 /* 1037 * If the ping was reset less than one second ago - which means 1038 * that we've received some PDU during the last second - assume 1039 * the traffic flows correctly and don't bother sending a NOP-Out. 1040 * 1041 * (It's 2 - one for one second, and one for incrementing is_timeout 1042 * earlier in this routine.) 1043 */ 1044 if (cs->cs_timeout < 2) 1045 return; 1046 1047 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1048 if (cp == NULL) { 1049 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1050 return; 1051 } 1052 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1053 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1054 bhsni->bhsni_flags = 0x80; 1055 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1056 1057 cfiscsi_pdu_queue(cp); 1058} 1059 1060static void 1061cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1062{ 1063 struct cfiscsi_data_wait *cdw; 1064 union ctl_io *io; 1065 int error, last, wait; 1066 1067 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1068 if (io == NULL) { 1069 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1070 return; 1071 } 1072 ctl_zero_io(io); 1073 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1074 io->io_hdr.io_type = CTL_IO_TASK; 1075 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1076 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1077 io->io_hdr.nexus.targ_target.id = 0; 1078 io->io_hdr.nexus.targ_lun = 0; 1079 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1080 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1081 wait = cs->cs_outstanding_ctl_pdus; 1082 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1083 error = ctl_queue(io); 1084 if (error != CTL_RETVAL_COMPLETE) { 1085 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1086 refcount_release(&cs->cs_outstanding_ctl_pdus); 1087 ctl_free_io(io); 1088 } 1089 1090 CFISCSI_SESSION_LOCK(cs); 1091 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1092 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1093 CFISCSI_SESSION_UNLOCK(cs); 1094 /* 1095 * Set nonzero port status; this prevents backends from 1096 * assuming that the data transfer actually succeeded 1097 * and writing uninitialized data to disk. 1098 */ 1099 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1100 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1101 uma_zfree(cfiscsi_data_wait_zone, cdw); 1102 CFISCSI_SESSION_LOCK(cs); 1103 } 1104 CFISCSI_SESSION_UNLOCK(cs); 1105 1106 /* 1107 * Wait for CTL to terminate all the tasks. 1108 */ 1109 if (wait > 0) 1110 CFISCSI_SESSION_WARN(cs, 1111 "waiting for CTL to terminate %d tasks", wait); 1112 for (;;) { 1113 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1114 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1115 if (last != 0) 1116 break; 1117 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1118 0, "cfiscsi_terminate", hz / 100); 1119 } 1120 if (wait > 0) 1121 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1122} 1123 1124static void 1125cfiscsi_maintenance_thread(void *arg) 1126{ 1127 struct cfiscsi_session *cs; 1128 1129 cs = arg; 1130 1131 for (;;) { 1132 CFISCSI_SESSION_LOCK(cs); 1133 if (cs->cs_terminating == false) 1134 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1135 CFISCSI_SESSION_UNLOCK(cs); 1136 1137 if (cs->cs_terminating) { 1138 1139 /* 1140 * We used to wait up to 30 seconds to deliver queued 1141 * PDUs to the initiator. We also tried hard to deliver 1142 * SCSI Responses for the aborted PDUs. We don't do 1143 * that anymore. We might need to revisit that. 1144 */ 1145 callout_drain(&cs->cs_callout); 1146 icl_conn_close(cs->cs_conn); 1147 1148 /* 1149 * At this point ICL receive thread is no longer 1150 * running; no new tasks can be queued. 1151 */ 1152 cfiscsi_session_terminate_tasks(cs); 1153 cfiscsi_session_delete(cs); 1154 kthread_exit(); 1155 return; 1156 } 1157 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1158 } 1159} 1160 1161static void 1162cfiscsi_session_terminate(struct cfiscsi_session *cs) 1163{ 1164 1165 if (cs->cs_terminating) 1166 return; 1167 cs->cs_terminating = true; 1168 cv_signal(&cs->cs_maintenance_cv); 1169#ifdef ICL_KERNEL_PROXY 1170 cv_signal(&cs->cs_login_cv); 1171#endif 1172} 1173 1174static int 1175cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1176{ 1177 struct cfiscsi_target *ct; 1178 char *name; 1179 int i; 1180 1181 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1182 1183 ct = cs->cs_target; 1184 name = strdup(cs->cs_initiator_id, M_CTL); 1185 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1186 if (i < 0) { 1187 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1188 i); 1189 cs->cs_ctl_initid = -1; 1190 return (1); 1191 } 1192 cs->cs_ctl_initid = i; 1193#if 0 1194 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1195#endif 1196 1197 return (0); 1198} 1199 1200static void 1201cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1202{ 1203 int error; 1204 1205 if (cs->cs_ctl_initid == -1) 1206 return; 1207 1208 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1209 if (error != 0) { 1210 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1211 error); 1212 } 1213 cs->cs_ctl_initid = -1; 1214} 1215 1216static struct cfiscsi_session * 1217cfiscsi_session_new(struct cfiscsi_softc *softc) 1218{ 1219 struct cfiscsi_session *cs; 1220 int error; 1221 1222 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1223 if (cs == NULL) { 1224 CFISCSI_WARN("malloc failed"); 1225 return (NULL); 1226 } 1227 cs->cs_ctl_initid = -1; 1228 1229 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1230 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1231 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1232 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1233#ifdef ICL_KERNEL_PROXY 1234 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1235#endif 1236 1237 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1238 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1239 cs->cs_conn->ic_error = cfiscsi_error_callback; 1240 cs->cs_conn->ic_prv0 = cs; 1241 1242 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1243 if (error != 0) { 1244 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1245 free(cs, M_CFISCSI); 1246 return (NULL); 1247 } 1248 1249 mtx_lock(&softc->lock); 1250 cs->cs_id = softc->last_session_id + 1; 1251 softc->last_session_id++; 1252 mtx_unlock(&softc->lock); 1253 1254 mtx_lock(&softc->lock); 1255 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1256 mtx_unlock(&softc->lock); 1257 1258 /* 1259 * Start pinging the initiator. 1260 */ 1261 callout_init(&cs->cs_callout, 1); 1262 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1263 1264 return (cs); 1265} 1266 1267static void 1268cfiscsi_session_delete(struct cfiscsi_session *cs) 1269{ 1270 struct cfiscsi_softc *softc; 1271 1272 softc = &cfiscsi_softc; 1273 1274 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1275 ("destroying session with outstanding CTL pdus")); 1276 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1277 ("destroying session with non-empty queue")); 1278 1279 cfiscsi_session_unregister_initiator(cs); 1280 if (cs->cs_target != NULL) 1281 cfiscsi_target_release(cs->cs_target); 1282 icl_conn_close(cs->cs_conn); 1283 icl_conn_free(cs->cs_conn); 1284 1285 mtx_lock(&softc->lock); 1286 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1287 mtx_unlock(&softc->lock); 1288 1289 free(cs, M_CFISCSI); 1290} 1291 1292int 1293cfiscsi_init(void) 1294{ 1295 struct cfiscsi_softc *softc; 1296 int retval; 1297 1298 softc = &cfiscsi_softc; 1299 retval = 0; 1300 bzero(softc, sizeof(*softc)); 1301 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1302 1303#ifdef ICL_KERNEL_PROXY 1304 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1305#endif 1306 TAILQ_INIT(&softc->sessions); 1307 TAILQ_INIT(&softc->targets); 1308 1309 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1310 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1311 UMA_ALIGN_PTR, 0); 1312 1313 return (0); 1314} 1315 1316#ifdef ICL_KERNEL_PROXY 1317static void 1318cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1319{ 1320 struct cfiscsi_session *cs; 1321 1322 cs = cfiscsi_session_new(&cfiscsi_softc); 1323 if (cs == NULL) { 1324 CFISCSI_WARN("failed to create session"); 1325 return; 1326 } 1327 1328 icl_conn_handoff_sock(cs->cs_conn, so); 1329 cs->cs_initiator_sa = sa; 1330 cs->cs_portal_id = portal_id; 1331 cs->cs_waiting_for_ctld = true; 1332 cv_signal(&cfiscsi_softc.accept_cv); 1333} 1334#endif 1335 1336static void 1337cfiscsi_online(void *arg) 1338{ 1339 struct cfiscsi_softc *softc; 1340 struct cfiscsi_target *ct; 1341 int online; 1342 1343 ct = (struct cfiscsi_target *)arg; 1344 softc = ct->ct_softc; 1345 1346 mtx_lock(&softc->lock); 1347 if (ct->ct_online) { 1348 mtx_unlock(&softc->lock); 1349 return; 1350 } 1351 ct->ct_online = 1; 1352 online = softc->online++; 1353 mtx_unlock(&softc->lock); 1354 if (online > 0) 1355 return; 1356 1357#ifdef ICL_KERNEL_PROXY 1358 if (softc->listener != NULL) 1359 icl_listen_free(softc->listener); 1360 softc->listener = icl_listen_new(cfiscsi_accept); 1361#endif 1362} 1363 1364static void 1365cfiscsi_offline(void *arg) 1366{ 1367 struct cfiscsi_softc *softc; 1368 struct cfiscsi_target *ct; 1369 struct cfiscsi_session *cs; 1370 int online; 1371 1372 ct = (struct cfiscsi_target *)arg; 1373 softc = ct->ct_softc; 1374 1375 mtx_lock(&softc->lock); 1376 if (!ct->ct_online) { 1377 mtx_unlock(&softc->lock); 1378 return; 1379 } 1380 ct->ct_online = 0; 1381 online = --softc->online; 1382 1383 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1384 if (cs->cs_target == ct) 1385 cfiscsi_session_terminate(cs); 1386 } 1387 mtx_unlock(&softc->lock); 1388 if (online > 0) 1389 return; 1390 1391#ifdef ICL_KERNEL_PROXY 1392 icl_listen_free(softc->listener); 1393 softc->listener = NULL; 1394#endif 1395} 1396 1397static int 1398cfiscsi_info(void *arg, struct sbuf *sb) 1399{ 1400 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1401 int retval; 1402 1403 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1404 ct->ct_state); 1405 return (retval); 1406} 1407 1408static void 1409cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1410{ 1411 struct cfiscsi_softc *softc; 1412 struct cfiscsi_session *cs, *cs2; 1413 struct cfiscsi_target *ct; 1414 struct ctl_iscsi_handoff_params *cihp; 1415 int error; 1416 1417 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1418 softc = &cfiscsi_softc; 1419 1420 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1421 cihp->initiator_name, cihp->initiator_addr, 1422 cihp->target_name); 1423 1424 ct = cfiscsi_target_find(softc, cihp->target_name); 1425 if (ct == NULL) { 1426 ci->status = CTL_ISCSI_ERROR; 1427 snprintf(ci->error_str, sizeof(ci->error_str), 1428 "%s: target not found", __func__); 1429 return; 1430 } 1431 1432 if (ct->ct_online == 0) { 1433 ci->status = CTL_ISCSI_ERROR; 1434 snprintf(ci->error_str, sizeof(ci->error_str), 1435 "%s: port offline", __func__); 1436 cfiscsi_target_release(ct); 1437 return; 1438 } 1439 1440#ifdef ICL_KERNEL_PROXY 1441 if (cihp->socket > 0 && cihp->connection_id > 0) { 1442 snprintf(ci->error_str, sizeof(ci->error_str), 1443 "both socket and connection_id set"); 1444 ci->status = CTL_ISCSI_ERROR; 1445 cfiscsi_target_release(ct); 1446 return; 1447 } 1448 if (cihp->socket == 0) { 1449 mtx_lock(&cfiscsi_softc.lock); 1450 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1451 if (cs->cs_id == cihp->socket) 1452 break; 1453 } 1454 if (cs == NULL) { 1455 mtx_unlock(&cfiscsi_softc.lock); 1456 snprintf(ci->error_str, sizeof(ci->error_str), 1457 "connection not found"); 1458 ci->status = CTL_ISCSI_ERROR; 1459 cfiscsi_target_release(ct); 1460 return; 1461 } 1462 mtx_unlock(&cfiscsi_softc.lock); 1463 } else { 1464#endif 1465 cs = cfiscsi_session_new(softc); 1466 if (cs == NULL) { 1467 ci->status = CTL_ISCSI_ERROR; 1468 snprintf(ci->error_str, sizeof(ci->error_str), 1469 "%s: cfiscsi_session_new failed", __func__); 1470 cfiscsi_target_release(ct); 1471 return; 1472 } 1473#ifdef ICL_KERNEL_PROXY 1474 } 1475#endif 1476 cs->cs_target = ct; 1477 1478 /* 1479 * First PDU of Full Feature phase has the same CmdSN as the last 1480 * PDU from the Login Phase received from the initiator. Thus, 1481 * the -1 below. 1482 */ 1483 cs->cs_portal_group_tag = cihp->portal_group_tag; 1484 cs->cs_cmdsn = cihp->cmdsn; 1485 cs->cs_statsn = cihp->statsn; 1486 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1487 cs->cs_max_burst_length = cihp->max_burst_length; 1488 cs->cs_immediate_data = !!cihp->immediate_data; 1489 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1490 cs->cs_conn->ic_header_crc32c = true; 1491 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1492 cs->cs_conn->ic_data_crc32c = true; 1493 1494 strlcpy(cs->cs_initiator_name, 1495 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1496 strlcpy(cs->cs_initiator_addr, 1497 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1498 strlcpy(cs->cs_initiator_alias, 1499 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1500 memcpy(cs->cs_initiator_isid, 1501 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1502 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1503 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1504 cihp->initiator_isid[0], cihp->initiator_isid[1], 1505 cihp->initiator_isid[2], cihp->initiator_isid[3], 1506 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1507 1508 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1509restart: 1510 if (!cs->cs_terminating) { 1511 mtx_lock(&softc->lock); 1512 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1513 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1514 cs->cs_target == cs2->cs_target && 1515 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1516 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1517 cfiscsi_session_terminate(cs2); 1518 mtx_unlock(&softc->lock); 1519 pause("cfiscsi_reinstate", 1); 1520 goto restart; 1521 } 1522 } 1523 mtx_unlock(&softc->lock); 1524 } 1525 1526 /* 1527 * Register initiator with CTL. 1528 */ 1529 cfiscsi_session_register_initiator(cs); 1530 1531#ifdef ICL_KERNEL_PROXY 1532 if (cihp->socket > 0) { 1533#endif 1534 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1535 if (error != 0) { 1536 cfiscsi_session_terminate(cs); 1537 refcount_release(&cs->cs_outstanding_ctl_pdus); 1538 ci->status = CTL_ISCSI_ERROR; 1539 snprintf(ci->error_str, sizeof(ci->error_str), 1540 "%s: icl_conn_handoff failed with error %d", 1541 __func__, error); 1542 return; 1543 } 1544#ifdef ICL_KERNEL_PROXY 1545 } 1546#endif 1547 1548#ifdef ICL_KERNEL_PROXY 1549 cs->cs_login_phase = false; 1550 1551 /* 1552 * First PDU of the Full Feature phase has likely already arrived. 1553 * We have to pick it up and execute properly. 1554 */ 1555 if (cs->cs_login_pdu != NULL) { 1556 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1557 cfiscsi_pdu_handle(cs->cs_login_pdu); 1558 cs->cs_login_pdu = NULL; 1559 } 1560#endif 1561 1562 refcount_release(&cs->cs_outstanding_ctl_pdus); 1563 ci->status = CTL_ISCSI_OK; 1564} 1565 1566static void 1567cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1568{ 1569 struct ctl_iscsi_list_params *cilp; 1570 struct cfiscsi_session *cs; 1571 struct cfiscsi_softc *softc; 1572 struct sbuf *sb; 1573 int error; 1574 1575 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1576 softc = &cfiscsi_softc; 1577 1578 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1579 if (sb == NULL) { 1580 ci->status = CTL_ISCSI_ERROR; 1581 snprintf(ci->error_str, sizeof(ci->error_str), 1582 "Unable to allocate %d bytes for iSCSI session list", 1583 cilp->alloc_len); 1584 return; 1585 } 1586 1587 sbuf_printf(sb, "<ctlislist>\n"); 1588 mtx_lock(&softc->lock); 1589 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1590#ifdef ICL_KERNEL_PROXY 1591 if (cs->cs_target == NULL) 1592 continue; 1593#endif 1594 error = sbuf_printf(sb, "<connection id=\"%d\">" 1595 "<initiator>%s</initiator>" 1596 "<initiator_addr>%s</initiator_addr>" 1597 "<initiator_alias>%s</initiator_alias>" 1598 "<target>%s</target>" 1599 "<target_alias>%s</target_alias>" 1600 "<header_digest>%s</header_digest>" 1601 "<data_digest>%s</data_digest>" 1602 "<max_data_segment_length>%zd</max_data_segment_length>" 1603 "<immediate_data>%d</immediate_data>" 1604 "<iser>%d</iser>" 1605 "</connection>\n", 1606 cs->cs_id, 1607 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1608 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1609 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1610 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1611 cs->cs_max_data_segment_length, 1612 cs->cs_immediate_data, 1613 cs->cs_conn->ic_iser); 1614 if (error != 0) 1615 break; 1616 } 1617 mtx_unlock(&softc->lock); 1618 error = sbuf_printf(sb, "</ctlislist>\n"); 1619 if (error != 0) { 1620 sbuf_delete(sb); 1621 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1622 snprintf(ci->error_str, sizeof(ci->error_str), 1623 "Out of space, %d bytes is too small", cilp->alloc_len); 1624 return; 1625 } 1626 sbuf_finish(sb); 1627 1628 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1629 cilp->fill_len = sbuf_len(sb) + 1; 1630 ci->status = CTL_ISCSI_OK; 1631 sbuf_delete(sb); 1632} 1633 1634static void 1635cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1636{ 1637 struct icl_pdu *response; 1638 struct iscsi_bhs_asynchronous_message *bhsam; 1639 struct ctl_iscsi_terminate_params *citp; 1640 struct cfiscsi_session *cs; 1641 struct cfiscsi_softc *softc; 1642 int found = 0; 1643 1644 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1645 softc = &cfiscsi_softc; 1646 1647 mtx_lock(&softc->lock); 1648 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1649 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1650 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1651 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1652 continue; 1653 1654 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1655 if (response == NULL) { 1656 /* 1657 * Oh well. Just terminate the connection. 1658 */ 1659 } else { 1660 bhsam = (struct iscsi_bhs_asynchronous_message *) 1661 response->ip_bhs; 1662 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1663 bhsam->bhsam_flags = 0x80; 1664 bhsam->bhsam_0xffffffff = 0xffffffff; 1665 bhsam->bhsam_async_event = 1666 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1667 cfiscsi_pdu_queue(response); 1668 } 1669 cfiscsi_session_terminate(cs); 1670 found++; 1671 } 1672 mtx_unlock(&softc->lock); 1673 1674 if (found == 0) { 1675 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1676 snprintf(ci->error_str, sizeof(ci->error_str), 1677 "No matching connections found"); 1678 return; 1679 } 1680 1681 ci->status = CTL_ISCSI_OK; 1682} 1683 1684static void 1685cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1686{ 1687 struct icl_pdu *response; 1688 struct iscsi_bhs_asynchronous_message *bhsam; 1689 struct ctl_iscsi_logout_params *cilp; 1690 struct cfiscsi_session *cs; 1691 struct cfiscsi_softc *softc; 1692 int found = 0; 1693 1694 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1695 softc = &cfiscsi_softc; 1696 1697 mtx_lock(&softc->lock); 1698 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1699 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1700 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1701 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1702 continue; 1703 1704 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1705 if (response == NULL) { 1706 ci->status = CTL_ISCSI_ERROR; 1707 snprintf(ci->error_str, sizeof(ci->error_str), 1708 "Unable to allocate memory"); 1709 mtx_unlock(&softc->lock); 1710 return; 1711 } 1712 bhsam = 1713 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1714 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1715 bhsam->bhsam_flags = 0x80; 1716 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1717 bhsam->bhsam_parameter3 = htons(10); 1718 cfiscsi_pdu_queue(response); 1719 found++; 1720 } 1721 mtx_unlock(&softc->lock); 1722 1723 if (found == 0) { 1724 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1725 snprintf(ci->error_str, sizeof(ci->error_str), 1726 "No matching connections found"); 1727 return; 1728 } 1729 1730 ci->status = CTL_ISCSI_OK; 1731} 1732 1733#ifdef ICL_KERNEL_PROXY 1734static void 1735cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1736{ 1737 struct ctl_iscsi_listen_params *cilp; 1738 struct sockaddr *sa; 1739 int error; 1740 1741 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1742 1743 if (cfiscsi_softc.listener == NULL) { 1744 CFISCSI_DEBUG("no listener"); 1745 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1746 ci->status = CTL_ISCSI_ERROR; 1747 return; 1748 } 1749 1750 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1751 if (error != 0) { 1752 CFISCSI_DEBUG("getsockaddr, error %d", error); 1753 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1754 ci->status = CTL_ISCSI_ERROR; 1755 return; 1756 } 1757 1758 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1759 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1760 if (error != 0) { 1761 free(sa, M_SONAME); 1762 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1763 snprintf(ci->error_str, sizeof(ci->error_str), 1764 "icl_listen_add failed, error %d", error); 1765 ci->status = CTL_ISCSI_ERROR; 1766 return; 1767 } 1768 1769 ci->status = CTL_ISCSI_OK; 1770} 1771 1772static void 1773cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1774{ 1775 struct ctl_iscsi_accept_params *ciap; 1776 struct cfiscsi_session *cs; 1777 int error; 1778 1779 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1780 1781 mtx_lock(&cfiscsi_softc.lock); 1782 for (;;) { 1783 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1784 if (cs->cs_waiting_for_ctld) 1785 break; 1786 } 1787 if (cs != NULL) 1788 break; 1789 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1790 if (error != 0) { 1791 mtx_unlock(&cfiscsi_softc.lock); 1792 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1793 ci->status = CTL_ISCSI_ERROR; 1794 return; 1795 } 1796 } 1797 mtx_unlock(&cfiscsi_softc.lock); 1798 1799 cs->cs_waiting_for_ctld = false; 1800 cs->cs_login_phase = true; 1801 1802 ciap->connection_id = cs->cs_id; 1803 ciap->portal_id = cs->cs_portal_id; 1804 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1805 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1806 cs->cs_initiator_sa->sa_len); 1807 if (error != 0) { 1808 snprintf(ci->error_str, sizeof(ci->error_str), 1809 "copyout failed with error %d", error); 1810 ci->status = CTL_ISCSI_ERROR; 1811 return; 1812 } 1813 1814 ci->status = CTL_ISCSI_OK; 1815} 1816 1817static void 1818cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1819{ 1820 struct ctl_iscsi_send_params *cisp; 1821 struct cfiscsi_session *cs; 1822 struct icl_pdu *ip; 1823 size_t datalen; 1824 void *data; 1825 int error; 1826 1827 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1828 1829 mtx_lock(&cfiscsi_softc.lock); 1830 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1831 if (cs->cs_id == cisp->connection_id) 1832 break; 1833 } 1834 if (cs == NULL) { 1835 mtx_unlock(&cfiscsi_softc.lock); 1836 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1837 ci->status = CTL_ISCSI_ERROR; 1838 return; 1839 } 1840 mtx_unlock(&cfiscsi_softc.lock); 1841 1842#if 0 1843 if (cs->cs_login_phase == false) 1844 return (EBUSY); 1845#endif 1846 1847 if (cs->cs_terminating) { 1848 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1849 ci->status = CTL_ISCSI_ERROR; 1850 return; 1851 } 1852 1853 datalen = cisp->data_segment_len; 1854 /* 1855 * XXX 1856 */ 1857 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1858 if (datalen > 65535) { 1859 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1860 ci->status = CTL_ISCSI_ERROR; 1861 return; 1862 } 1863 if (datalen > 0) { 1864 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1865 error = copyin(cisp->data_segment, data, datalen); 1866 if (error != 0) { 1867 free(data, M_CFISCSI); 1868 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1869 ci->status = CTL_ISCSI_ERROR; 1870 return; 1871 } 1872 } 1873 1874 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1875 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1876 if (datalen > 0) { 1877 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1878 free(data, M_CFISCSI); 1879 } 1880 CFISCSI_SESSION_LOCK(cs); 1881 icl_pdu_queue(ip); 1882 CFISCSI_SESSION_UNLOCK(cs); 1883 ci->status = CTL_ISCSI_OK; 1884} 1885 1886static void 1887cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1888{ 1889 struct ctl_iscsi_receive_params *cirp; 1890 struct cfiscsi_session *cs; 1891 struct icl_pdu *ip; 1892 void *data; 1893 int error; 1894 1895 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1896 1897 mtx_lock(&cfiscsi_softc.lock); 1898 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1899 if (cs->cs_id == cirp->connection_id) 1900 break; 1901 } 1902 if (cs == NULL) { 1903 mtx_unlock(&cfiscsi_softc.lock); 1904 snprintf(ci->error_str, sizeof(ci->error_str), 1905 "connection not found"); 1906 ci->status = CTL_ISCSI_ERROR; 1907 return; 1908 } 1909 mtx_unlock(&cfiscsi_softc.lock); 1910 1911#if 0 1912 if (is->is_login_phase == false) 1913 return (EBUSY); 1914#endif 1915 1916 CFISCSI_SESSION_LOCK(cs); 1917 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1918 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1919 if (error != 0) { 1920 CFISCSI_SESSION_UNLOCK(cs); 1921 snprintf(ci->error_str, sizeof(ci->error_str), 1922 "interrupted by signal"); 1923 ci->status = CTL_ISCSI_ERROR; 1924 return; 1925 } 1926 } 1927 1928 if (cs->cs_terminating) { 1929 CFISCSI_SESSION_UNLOCK(cs); 1930 snprintf(ci->error_str, sizeof(ci->error_str), 1931 "connection terminating"); 1932 ci->status = CTL_ISCSI_ERROR; 1933 return; 1934 } 1935 ip = cs->cs_login_pdu; 1936 cs->cs_login_pdu = NULL; 1937 CFISCSI_SESSION_UNLOCK(cs); 1938 1939 if (ip->ip_data_len > cirp->data_segment_len) { 1940 icl_pdu_free(ip); 1941 snprintf(ci->error_str, sizeof(ci->error_str), 1942 "data segment too big"); 1943 ci->status = CTL_ISCSI_ERROR; 1944 return; 1945 } 1946 1947 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1948 if (ip->ip_data_len > 0) { 1949 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1950 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1951 copyout(data, cirp->data_segment, ip->ip_data_len); 1952 free(data, M_CFISCSI); 1953 } 1954 1955 icl_pdu_free(ip); 1956 ci->status = CTL_ISCSI_OK; 1957} 1958 1959#endif /* !ICL_KERNEL_PROXY */ 1960 1961static void 1962cfiscsi_ioctl_port_create(struct ctl_req *req) 1963{ 1964 struct cfiscsi_target *ct; 1965 struct ctl_port *port; 1966 const char *target, *alias, *tag; 1967 struct scsi_vpd_id_descriptor *desc; 1968 ctl_options_t opts; 1969 int retval, len, idlen; 1970 1971 ctl_init_opts(&opts, req->num_args, req->kern_args); 1972 target = ctl_get_opt(&opts, "cfiscsi_target"); 1973 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1974 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1975 if (target == NULL || tag == NULL) { 1976 req->status = CTL_LUN_ERROR; 1977 snprintf(req->error_str, sizeof(req->error_str), 1978 "Missing required argument"); 1979 ctl_free_opts(&opts); 1980 return; 1981 } 1982 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1983 if (ct == NULL) { 1984 req->status = CTL_LUN_ERROR; 1985 snprintf(req->error_str, sizeof(req->error_str), 1986 "failed to create target \"%s\"", target); 1987 ctl_free_opts(&opts); 1988 return; 1989 } 1990 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1991 req->status = CTL_LUN_ERROR; 1992 snprintf(req->error_str, sizeof(req->error_str), 1993 "target \"%s\" already exist", target); 1994 cfiscsi_target_release(ct); 1995 ctl_free_opts(&opts); 1996 return; 1997 } 1998 port = &ct->ct_port; 1999 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2000 goto done; 2001 2002 port->frontend = &cfiscsi_frontend; 2003 port->port_type = CTL_PORT_ISCSI; 2004 /* XXX KDM what should the real number be here? */ 2005 port->num_requested_ctl_io = 4096; 2006 port->port_name = "iscsi"; 2007 port->physical_port = strtoul(tag, NULL, 0); 2008 port->virtual_port = ct->ct_target_id; 2009 port->port_online = cfiscsi_online; 2010 port->port_offline = cfiscsi_offline; 2011 port->port_info = cfiscsi_info; 2012 port->onoff_arg = ct; 2013 port->lun_enable = cfiscsi_lun_enable; 2014 port->lun_disable = cfiscsi_lun_disable; 2015 port->lun_map = cfiscsi_lun_map; 2016 port->targ_lun_arg = ct; 2017 port->fe_datamove = cfiscsi_datamove; 2018 port->fe_done = cfiscsi_done; 2019 2020 /* XXX KDM what should we report here? */ 2021 /* XXX These should probably be fetched from CTL. */ 2022 port->max_targets = 1; 2023 port->max_target_id = 15; 2024 2025 port->options = opts; 2026 STAILQ_INIT(&opts); 2027 2028 /* Generate Port ID. */ 2029 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2030 idlen = roundup2(idlen, 4); 2031 len = sizeof(struct scsi_vpd_device_id) + idlen; 2032 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2033 M_CTL, M_WAITOK | M_ZERO); 2034 port->port_devid->len = len; 2035 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2036 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2037 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2038 SVPD_ID_TYPE_SCSI_NAME; 2039 desc->length = idlen; 2040 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2041 target, port->physical_port); 2042 2043 /* Generate Target ID. */ 2044 idlen = strlen(target) + 1; 2045 idlen = roundup2(idlen, 4); 2046 len = sizeof(struct scsi_vpd_device_id) + idlen; 2047 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2048 M_CTL, M_WAITOK | M_ZERO); 2049 port->target_devid->len = len; 2050 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2051 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2052 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2053 SVPD_ID_TYPE_SCSI_NAME; 2054 desc->length = idlen; 2055 strlcpy(desc->identifier, target, idlen); 2056 2057 retval = ctl_port_register(port, /*master_SC*/ 1); 2058 if (retval != 0) { 2059 ctl_free_opts(&port->options); 2060 cfiscsi_target_release(ct); 2061 free(port->port_devid, M_CFISCSI); 2062 free(port->target_devid, M_CFISCSI); 2063 req->status = CTL_LUN_ERROR; 2064 snprintf(req->error_str, sizeof(req->error_str), 2065 "ctl_frontend_register() failed with error %d", retval); 2066 return; 2067 } 2068done: 2069 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2070 req->status = CTL_LUN_OK; 2071 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2072 sizeof(port->targ_port)); //XXX 2073} 2074 2075static void 2076cfiscsi_ioctl_port_remove(struct ctl_req *req) 2077{ 2078 struct cfiscsi_target *ct; 2079 const char *target; 2080 ctl_options_t opts; 2081 2082 ctl_init_opts(&opts, req->num_args, req->kern_args); 2083 target = ctl_get_opt(&opts, "cfiscsi_target"); 2084 if (target == NULL) { 2085 ctl_free_opts(&opts); 2086 req->status = CTL_LUN_ERROR; 2087 snprintf(req->error_str, sizeof(req->error_str), 2088 "Missing required argument"); 2089 return; 2090 } 2091 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2092 if (ct == NULL) { 2093 ctl_free_opts(&opts); 2094 req->status = CTL_LUN_ERROR; 2095 snprintf(req->error_str, sizeof(req->error_str), 2096 "can't find target \"%s\"", target); 2097 return; 2098 } 2099 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2100 ctl_free_opts(&opts); 2101 req->status = CTL_LUN_ERROR; 2102 snprintf(req->error_str, sizeof(req->error_str), 2103 "target \"%s\" is already dying", target); 2104 return; 2105 } 2106 ctl_free_opts(&opts); 2107 2108 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2109 ctl_port_offline(&ct->ct_port); 2110 cfiscsi_target_release(ct); 2111 cfiscsi_target_release(ct); 2112} 2113 2114static int 2115cfiscsi_ioctl(struct cdev *dev, 2116 u_long cmd, caddr_t addr, int flag, struct thread *td) 2117{ 2118 struct ctl_iscsi *ci; 2119 struct ctl_req *req; 2120 2121 if (cmd == CTL_PORT_REQ) { 2122 req = (struct ctl_req *)addr; 2123 switch (req->reqtype) { 2124 case CTL_REQ_CREATE: 2125 cfiscsi_ioctl_port_create(req); 2126 break; 2127 case CTL_REQ_REMOVE: 2128 cfiscsi_ioctl_port_remove(req); 2129 break; 2130 default: 2131 req->status = CTL_LUN_ERROR; 2132 snprintf(req->error_str, sizeof(req->error_str), 2133 "Unsupported request type %d", req->reqtype); 2134 } 2135 return (0); 2136 } 2137 2138 if (cmd != CTL_ISCSI) 2139 return (ENOTTY); 2140 2141 ci = (struct ctl_iscsi *)addr; 2142 switch (ci->type) { 2143 case CTL_ISCSI_HANDOFF: 2144 cfiscsi_ioctl_handoff(ci); 2145 break; 2146 case CTL_ISCSI_LIST: 2147 cfiscsi_ioctl_list(ci); 2148 break; 2149 case CTL_ISCSI_TERMINATE: 2150 cfiscsi_ioctl_terminate(ci); 2151 break; 2152 case CTL_ISCSI_LOGOUT: 2153 cfiscsi_ioctl_logout(ci); 2154 break; 2155#ifdef ICL_KERNEL_PROXY 2156 case CTL_ISCSI_LISTEN: 2157 cfiscsi_ioctl_listen(ci); 2158 break; 2159 case CTL_ISCSI_ACCEPT: 2160 cfiscsi_ioctl_accept(ci); 2161 break; 2162 case CTL_ISCSI_SEND: 2163 cfiscsi_ioctl_send(ci); 2164 break; 2165 case CTL_ISCSI_RECEIVE: 2166 cfiscsi_ioctl_receive(ci); 2167 break; 2168#else 2169 case CTL_ISCSI_LISTEN: 2170 case CTL_ISCSI_ACCEPT: 2171 case CTL_ISCSI_SEND: 2172 case CTL_ISCSI_RECEIVE: 2173 ci->status = CTL_ISCSI_ERROR; 2174 snprintf(ci->error_str, sizeof(ci->error_str), 2175 "%s: CTL compiled without ICL_KERNEL_PROXY", 2176 __func__); 2177 break; 2178#endif /* !ICL_KERNEL_PROXY */ 2179 default: 2180 ci->status = CTL_ISCSI_ERROR; 2181 snprintf(ci->error_str, sizeof(ci->error_str), 2182 "%s: invalid iSCSI request type %d", __func__, ci->type); 2183 break; 2184 } 2185 2186 return (0); 2187} 2188 2189static void 2190cfiscsi_target_hold(struct cfiscsi_target *ct) 2191{ 2192 2193 refcount_acquire(&ct->ct_refcount); 2194} 2195 2196static void 2197cfiscsi_target_release(struct cfiscsi_target *ct) 2198{ 2199 struct cfiscsi_softc *softc; 2200 2201 softc = ct->ct_softc; 2202 mtx_lock(&softc->lock); 2203 if (refcount_release(&ct->ct_refcount)) { 2204 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2205 mtx_unlock(&softc->lock); 2206 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2207 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2208 if (ctl_port_deregister(&ct->ct_port) != 0) 2209 printf("%s: ctl_port_deregister() failed\n", 2210 __func__); 2211 } 2212 free(ct, M_CFISCSI); 2213 2214 return; 2215 } 2216 mtx_unlock(&softc->lock); 2217} 2218 2219static struct cfiscsi_target * 2220cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2221{ 2222 struct cfiscsi_target *ct; 2223 2224 mtx_lock(&softc->lock); 2225 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2226 if (strcmp(name, ct->ct_name) != 0 || 2227 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2228 continue; 2229 cfiscsi_target_hold(ct); 2230 mtx_unlock(&softc->lock); 2231 return (ct); 2232 } 2233 mtx_unlock(&softc->lock); 2234 2235 return (NULL); 2236} 2237 2238static struct cfiscsi_target * 2239cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2240 const char *alias) 2241{ 2242 struct cfiscsi_target *ct, *newct; 2243 int i; 2244 2245 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2246 return (NULL); 2247 2248 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2249 2250 mtx_lock(&softc->lock); 2251 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2252 if (strcmp(name, ct->ct_name) != 0 || 2253 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2254 continue; 2255 cfiscsi_target_hold(ct); 2256 mtx_unlock(&softc->lock); 2257 free(newct, M_CFISCSI); 2258 return (ct); 2259 } 2260 2261 for (i = 0; i < CTL_MAX_LUNS; i++) 2262 newct->ct_luns[i] = UINT32_MAX; 2263 2264 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2265 if (alias != NULL) 2266 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2267 refcount_init(&newct->ct_refcount, 1); 2268 newct->ct_softc = softc; 2269 if (TAILQ_EMPTY(&softc->targets)) 2270 softc->last_target_id = 0; 2271 newct->ct_target_id = ++softc->last_target_id; 2272 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2273 mtx_unlock(&softc->lock); 2274 2275 return (newct); 2276} 2277 2278/* 2279 * Takes LUN from the target space and returns LUN from the CTL space. 2280 */ 2281static uint32_t 2282cfiscsi_lun_map(void *arg, uint32_t lun) 2283{ 2284 struct cfiscsi_target *ct = arg; 2285 2286 if (lun >= CTL_MAX_LUNS) { 2287 CFISCSI_DEBUG("requested lun number %d is higher " 2288 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2289 return (UINT32_MAX); 2290 } 2291 return (ct->ct_luns[lun]); 2292} 2293 2294static int 2295cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2296 unsigned long lun_id, unsigned long ctl_lun_id) 2297{ 2298 2299 if (lun_id >= CTL_MAX_LUNS) { 2300 CFISCSI_WARN("requested lun number %ld is higher " 2301 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2302 return (-1); 2303 } 2304 2305 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2306 /* 2307 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2308 * when the LUN is created, and a second time just before 2309 * the port is brought online; don't emit warnings 2310 * for that case. 2311 */ 2312 if (ct->ct_luns[lun_id] == ctl_lun_id) 2313 return (0); 2314 CFISCSI_WARN("lun %ld already allocated", lun_id); 2315 return (-1); 2316 } 2317 2318#if 0 2319 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2320 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2321#endif 2322 2323 ct->ct_luns[lun_id] = ctl_lun_id; 2324 2325 return (0); 2326} 2327 2328static int 2329cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2330{ 2331 struct cfiscsi_softc *softc; 2332 struct cfiscsi_target *ct; 2333 const char *target = NULL; 2334 const char *lun = NULL; 2335 unsigned long tmp; 2336 2337 ct = (struct cfiscsi_target *)arg; 2338 softc = ct->ct_softc; 2339 2340 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2341 "cfiscsi_target"); 2342 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2343 "cfiscsi_lun"); 2344 2345 if (target == NULL && lun == NULL) 2346 return (0); 2347 2348 if (target == NULL || lun == NULL) { 2349 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2350 "cfiscsi_lun, or the other way around; ignoring"); 2351 return (0); 2352 } 2353 2354 if (strcmp(target, ct->ct_name) != 0) 2355 return (0); 2356 2357 tmp = strtoul(lun, NULL, 10); 2358 cfiscsi_target_set_lun(ct, tmp, lun_id); 2359 return (0); 2360} 2361 2362static int 2363cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2364{ 2365 struct cfiscsi_softc *softc; 2366 struct cfiscsi_target *ct; 2367 int i; 2368 2369 ct = (struct cfiscsi_target *)arg; 2370 softc = ct->ct_softc; 2371 2372 mtx_lock(&softc->lock); 2373 for (i = 0; i < CTL_MAX_LUNS; i++) { 2374 if (ct->ct_luns[i] != lun_id) 2375 continue; 2376 ct->ct_luns[i] = UINT32_MAX; 2377 break; 2378 } 2379 mtx_unlock(&softc->lock); 2380 return (0); 2381} 2382 2383static void 2384cfiscsi_datamove_in(union ctl_io *io) 2385{ 2386 struct cfiscsi_session *cs; 2387 struct icl_pdu *request, *response; 2388 const struct iscsi_bhs_scsi_command *bhssc; 2389 struct iscsi_bhs_data_in *bhsdi; 2390 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2391 size_t len, expected_len, sg_len, buffer_offset; 2392 const char *sg_addr; 2393 int ctl_sg_count, error, i; 2394 2395 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2396 cs = PDU_SESSION(request); 2397 2398 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2399 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2400 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2401 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2402 2403 if (io->scsiio.kern_sg_entries > 0) { 2404 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2405 ctl_sg_count = io->scsiio.kern_sg_entries; 2406 } else { 2407 ctl_sglist = &ctl_sg_entry; 2408 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2409 ctl_sglist->len = io->scsiio.kern_data_len; 2410 ctl_sg_count = 1; 2411 } 2412 2413 /* 2414 * This is the total amount of data to be transferred within the current 2415 * SCSI command. We need to record it so that we can properly report 2416 * underflow/underflow. 2417 */ 2418 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2419 2420 /* 2421 * This is the offset within the current SCSI command; for the first 2422 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2423 * it will be the sum of lengths of previous ones. 2424 */ 2425 buffer_offset = io->scsiio.kern_rel_offset; 2426 2427 /* 2428 * This is the transfer length expected by the initiator. In theory, 2429 * it could be different from the correct amount of data from the SCSI 2430 * point of view, even if that doesn't make any sense. 2431 */ 2432 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2433#if 0 2434 if (expected_len != io->scsiio.kern_total_len) { 2435 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2436 "actual length %zd", expected_len, 2437 (size_t)io->scsiio.kern_total_len); 2438 } 2439#endif 2440 2441 if (buffer_offset >= expected_len) { 2442#if 0 2443 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2444 "already sent the expected len", buffer_offset); 2445#endif 2446 io->scsiio.be_move_done(io); 2447 return; 2448 } 2449 2450 i = 0; 2451 sg_addr = NULL; 2452 sg_len = 0; 2453 response = NULL; 2454 bhsdi = NULL; 2455 for (;;) { 2456 if (response == NULL) { 2457 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2458 if (response == NULL) { 2459 CFISCSI_SESSION_WARN(cs, "failed to " 2460 "allocate memory; dropping connection"); 2461 ctl_set_busy(&io->scsiio); 2462 io->scsiio.be_move_done(io); 2463 cfiscsi_session_terminate(cs); 2464 return; 2465 } 2466 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2467 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2468 bhsdi->bhsdi_initiator_task_tag = 2469 bhssc->bhssc_initiator_task_tag; 2470 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2471 PDU_EXPDATASN(request)++; 2472 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2473 } 2474 2475 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2476 if (sg_len == 0) { 2477 sg_addr = ctl_sglist[i].addr; 2478 sg_len = ctl_sglist[i].len; 2479 KASSERT(sg_len > 0, ("sg_len <= 0")); 2480 } 2481 2482 len = sg_len; 2483 2484 /* 2485 * Truncate to maximum data segment length. 2486 */ 2487 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2488 ("ip_data_len %zd >= max_data_segment_length %zd", 2489 response->ip_data_len, cs->cs_max_data_segment_length)); 2490 if (response->ip_data_len + len > 2491 cs->cs_max_data_segment_length) { 2492 len = cs->cs_max_data_segment_length - 2493 response->ip_data_len; 2494 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2495 len, sg_len)); 2496 } 2497 2498 /* 2499 * Truncate to expected data transfer length. 2500 */ 2501 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2502 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2503 buffer_offset, response->ip_data_len, expected_len)); 2504 if (buffer_offset + response->ip_data_len + len > expected_len) { 2505 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2506 "to expected data transfer length %zd", 2507 buffer_offset + response->ip_data_len + len, expected_len); 2508 len = expected_len - (buffer_offset + response->ip_data_len); 2509 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2510 len, sg_len)); 2511 } 2512 2513 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2514 if (error != 0) { 2515 CFISCSI_SESSION_WARN(cs, "failed to " 2516 "allocate memory; dropping connection"); 2517 icl_pdu_free(response); 2518 ctl_set_busy(&io->scsiio); 2519 io->scsiio.be_move_done(io); 2520 cfiscsi_session_terminate(cs); 2521 return; 2522 } 2523 sg_addr += len; 2524 sg_len -= len; 2525 2526 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2527 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2528 buffer_offset, response->ip_data_len, expected_len)); 2529 if (buffer_offset + response->ip_data_len == expected_len) { 2530 /* 2531 * Already have the amount of data the initiator wanted. 2532 */ 2533 break; 2534 } 2535 2536 if (sg_len == 0) { 2537 /* 2538 * End of scatter-gather segment; 2539 * proceed to the next one... 2540 */ 2541 if (i == ctl_sg_count - 1) { 2542 /* 2543 * ... unless this was the last one. 2544 */ 2545 break; 2546 } 2547 i++; 2548 } 2549 2550 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2551 /* 2552 * Can't stuff more data into the current PDU; 2553 * queue it. Note that's not enough to check 2554 * for kern_data_resid == 0 instead; there 2555 * may be several Data-In PDUs for the final 2556 * call to cfiscsi_datamove(), and we want 2557 * to set the F flag only on the last of them. 2558 */ 2559 buffer_offset += response->ip_data_len; 2560 if (buffer_offset == io->scsiio.kern_total_len || 2561 buffer_offset == expected_len) 2562 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2563 cfiscsi_pdu_queue(response); 2564 response = NULL; 2565 bhsdi = NULL; 2566 } 2567 } 2568 if (response != NULL) { 2569 buffer_offset += response->ip_data_len; 2570 if (buffer_offset == io->scsiio.kern_total_len || 2571 buffer_offset == expected_len) 2572 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2573 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2574 cfiscsi_pdu_queue(response); 2575 } 2576 2577 io->scsiio.be_move_done(io); 2578} 2579 2580static void 2581cfiscsi_datamove_out(union ctl_io *io) 2582{ 2583 struct cfiscsi_session *cs; 2584 struct icl_pdu *request, *response; 2585 const struct iscsi_bhs_scsi_command *bhssc; 2586 struct iscsi_bhs_r2t *bhsr2t; 2587 struct cfiscsi_data_wait *cdw; 2588 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2589 uint32_t expected_len, r2t_off, r2t_len; 2590 uint32_t target_transfer_tag; 2591 bool done; 2592 2593 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2594 cs = PDU_SESSION(request); 2595 2596 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2597 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2598 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2599 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2600 2601 /* 2602 * We need to record it so that we can properly report 2603 * underflow/underflow. 2604 */ 2605 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2606 2607 /* 2608 * Report write underflow as error since CTL and backends don't 2609 * really support it, and SCSI does not tell how to do it right. 2610 */ 2611 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2612 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2613 expected_len) { 2614 io->scsiio.io_hdr.port_status = 43; 2615 io->scsiio.be_move_done(io); 2616 return; 2617 } 2618 2619 target_transfer_tag = 2620 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2621 2622#if 0 2623 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2624 "task tag 0x%x, target transfer tag 0x%x", 2625 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2626#endif 2627 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2628 if (cdw == NULL) { 2629 CFISCSI_SESSION_WARN(cs, "failed to " 2630 "allocate memory; dropping connection"); 2631 ctl_set_busy(&io->scsiio); 2632 io->scsiio.be_move_done(io); 2633 cfiscsi_session_terminate(cs); 2634 return; 2635 } 2636 cdw->cdw_ctl_io = io; 2637 cdw->cdw_target_transfer_tag = target_transfer_tag; 2638 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2639 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2640 2641 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2642 if (io->scsiio.kern_sg_entries > 0) { 2643 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2644 } else { 2645 ctl_sglist = &ctl_sg_entry; 2646 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2647 ctl_sglist->len = io->scsiio.kern_data_len; 2648 } 2649 cdw->cdw_sg_index = 0; 2650 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2651 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2652 r2t_off = io->scsiio.ext_data_filled; 2653 while (r2t_off > 0) { 2654 if (r2t_off >= cdw->cdw_sg_len) { 2655 r2t_off -= cdw->cdw_sg_len; 2656 cdw->cdw_sg_index++; 2657 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2658 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2659 continue; 2660 } 2661 cdw->cdw_sg_addr += r2t_off; 2662 cdw->cdw_sg_len -= r2t_off; 2663 r2t_off = 0; 2664 } 2665 2666 if (cs->cs_immediate_data && 2667 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2668 icl_pdu_data_segment_length(request)) { 2669 done = cfiscsi_handle_data_segment(request, cdw); 2670 if (done) { 2671 uma_zfree(cfiscsi_data_wait_zone, cdw); 2672 io->scsiio.be_move_done(io); 2673 return; 2674 } 2675 } 2676 2677 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2678 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2679 cs->cs_max_burst_length); 2680 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2681 2682 CFISCSI_SESSION_LOCK(cs); 2683 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2684 CFISCSI_SESSION_UNLOCK(cs); 2685 2686 /* 2687 * XXX: We should limit the number of outstanding R2T PDUs 2688 * per task to MaxOutstandingR2T. 2689 */ 2690 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2691 if (response == NULL) { 2692 CFISCSI_SESSION_WARN(cs, "failed to " 2693 "allocate memory; dropping connection"); 2694 ctl_set_busy(&io->scsiio); 2695 io->scsiio.be_move_done(io); 2696 cfiscsi_session_terminate(cs); 2697 return; 2698 } 2699 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2700 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2701 bhsr2t->bhsr2t_flags = 0x80; 2702 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2703 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2704 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2705 /* 2706 * XXX: Here we assume that cfiscsi_datamove() won't ever 2707 * be running concurrently on several CPUs for a given 2708 * command. 2709 */ 2710 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2711 PDU_R2TSN(request)++; 2712 /* 2713 * This is the offset within the current SCSI command; 2714 * i.e. for the first call of datamove(), it will be 0, 2715 * and for subsequent ones it will be the sum of lengths 2716 * of previous ones. 2717 * 2718 * The ext_data_filled is to account for unsolicited 2719 * (immediate) data that might have already arrived. 2720 */ 2721 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2722 /* 2723 * This is the total length (sum of S/G lengths) this call 2724 * to cfiscsi_datamove() is supposed to handle, limited by 2725 * MaxBurstLength. 2726 */ 2727 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2728 cfiscsi_pdu_queue(response); 2729} 2730 2731static void 2732cfiscsi_datamove(union ctl_io *io) 2733{ 2734 2735 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2736 cfiscsi_datamove_in(io); 2737 else { 2738 /* We hadn't received anything during this datamove yet. */ 2739 io->scsiio.ext_data_filled = 0; 2740 cfiscsi_datamove_out(io); 2741 } 2742} 2743 2744static void 2745cfiscsi_scsi_command_done(union ctl_io *io) 2746{ 2747 struct icl_pdu *request, *response; 2748 struct iscsi_bhs_scsi_command *bhssc; 2749 struct iscsi_bhs_scsi_response *bhssr; 2750#ifdef DIAGNOSTIC 2751 struct cfiscsi_data_wait *cdw; 2752#endif 2753 struct cfiscsi_session *cs; 2754 uint16_t sense_length; 2755 2756 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2757 cs = PDU_SESSION(request); 2758 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2759 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2760 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2761 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2762 2763 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2764 // bhssc->bhssc_initiator_task_tag); 2765 2766#ifdef DIAGNOSTIC 2767 CFISCSI_SESSION_LOCK(cs); 2768 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2769 KASSERT(bhssc->bhssc_initiator_task_tag != 2770 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2771 CFISCSI_SESSION_UNLOCK(cs); 2772#endif 2773 2774 /* 2775 * Do not return status for aborted commands. 2776 * There are exceptions, but none supported by CTL yet. 2777 */ 2778 if ((io->io_hdr.flags & CTL_FLAG_ABORT) && 2779 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) { 2780 ctl_free_io(io); 2781 icl_pdu_free(request); 2782 return; 2783 } 2784 2785 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2786 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2787 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2788 bhssr->bhssr_flags = 0x80; 2789 /* 2790 * XXX: We don't deal with bidirectional under/overflows; 2791 * does anything actually support those? 2792 */ 2793 if (PDU_TOTAL_TRANSFER_LEN(request) < 2794 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2795 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2796 bhssr->bhssr_residual_count = 2797 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2798 PDU_TOTAL_TRANSFER_LEN(request)); 2799 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2800 // ntohl(bhssr->bhssr_residual_count)); 2801 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2802 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2803 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2804 bhssr->bhssr_residual_count = 2805 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2806 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2807 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2808 // ntohl(bhssr->bhssr_residual_count)); 2809 } 2810 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2811 bhssr->bhssr_status = io->scsiio.scsi_status; 2812 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2813 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2814 2815 if (io->scsiio.sense_len > 0) { 2816#if 0 2817 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2818 io->scsiio.sense_len); 2819#endif 2820 sense_length = htons(io->scsiio.sense_len); 2821 icl_pdu_append_data(response, 2822 &sense_length, sizeof(sense_length), M_WAITOK); 2823 icl_pdu_append_data(response, 2824 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2825 } 2826 2827 ctl_free_io(io); 2828 icl_pdu_free(request); 2829 cfiscsi_pdu_queue(response); 2830} 2831 2832static void 2833cfiscsi_task_management_done(union ctl_io *io) 2834{ 2835 struct icl_pdu *request, *response; 2836 struct iscsi_bhs_task_management_request *bhstmr; 2837 struct iscsi_bhs_task_management_response *bhstmr2; 2838 struct cfiscsi_data_wait *cdw, *tmpcdw; 2839 struct cfiscsi_session *cs; 2840 2841 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2842 cs = PDU_SESSION(request); 2843 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2844 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2845 ISCSI_BHS_OPCODE_TASK_REQUEST, 2846 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2847 2848#if 0 2849 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2850 bhstmr->bhstmr_initiator_task_tag, 2851 bhstmr->bhstmr_referenced_task_tag); 2852#endif 2853 2854 if ((bhstmr->bhstmr_function & ~0x80) == 2855 BHSTMR_FUNCTION_ABORT_TASK) { 2856 /* 2857 * Make sure we no longer wait for Data-Out for this command. 2858 */ 2859 CFISCSI_SESSION_LOCK(cs); 2860 TAILQ_FOREACH_SAFE(cdw, 2861 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2862 if (bhstmr->bhstmr_referenced_task_tag != 2863 cdw->cdw_initiator_task_tag) 2864 continue; 2865 2866#if 0 2867 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2868 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2869#endif 2870 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2871 cdw, cdw_next); 2872 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2873 uma_zfree(cfiscsi_data_wait_zone, cdw); 2874 } 2875 CFISCSI_SESSION_UNLOCK(cs); 2876 } 2877 2878 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2879 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2880 response->ip_bhs; 2881 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2882 bhstmr2->bhstmr_flags = 0x80; 2883 if (io->io_hdr.status == CTL_SUCCESS) { 2884 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2885 } else { 2886 /* 2887 * XXX: How to figure out what exactly went wrong? iSCSI spec 2888 * expects us to provide detailed error, e.g. "Task does 2889 * not exist" or "LUN does not exist". 2890 */ 2891 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2892 bhstmr2->bhstmr_response = 2893 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2894 } 2895 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2896 2897 ctl_free_io(io); 2898 icl_pdu_free(request); 2899 cfiscsi_pdu_queue(response); 2900} 2901 2902static void 2903cfiscsi_done(union ctl_io *io) 2904{ 2905 struct icl_pdu *request; 2906 struct cfiscsi_session *cs; 2907 2908 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2909 ("invalid CTL status %#x", io->io_hdr.status)); 2910 2911 if (io->io_hdr.io_type == CTL_IO_TASK && 2912 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2913 /* 2914 * Implicit task termination has just completed; nothing to do. 2915 */ 2916 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2917 cs->cs_tasks_aborted = true; 2918 refcount_release(&cs->cs_outstanding_ctl_pdus); 2919 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2920 ctl_free_io(io); 2921 return; 2922 } 2923 2924 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2925 cs = PDU_SESSION(request); 2926 refcount_release(&cs->cs_outstanding_ctl_pdus); 2927 2928 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2929 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2930 cfiscsi_scsi_command_done(io); 2931 break; 2932 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2933 cfiscsi_task_management_done(io); 2934 break; 2935 default: 2936 panic("cfiscsi_done called with wrong opcode 0x%x", 2937 request->ip_bhs->bhs_opcode); 2938 } 2939} 2940