ctl_frontend_iscsi.c revision 275495
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 275495 2014-12-05 07:25:02Z 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 275495 2014-12-05 07:25:02Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capability.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include <dev/iscsi/icl.h> 71#include <dev/iscsi/iscsi_proto.h> 72#include <cam/ctl/ctl_frontend_iscsi.h> 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 1; 88TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95static int login_timeout = 60; 96TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99static int maxcmdsn_delta = 256; 100TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105#define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113#define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130#define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145#define PDU_EXPDATASN(X) (X)->ip_prv0 146#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147#define PDU_R2TSN(X) (X)->ip_prv2 148 149int cfiscsi_init(void); 150static void cfiscsi_online(void *arg); 151static void cfiscsi_offline(void *arg); 152static int cfiscsi_info(void *arg, struct sbuf *sb); 153static int cfiscsi_lun_enable(void *arg, 154 struct ctl_id target_id, int lun_id); 155static int cfiscsi_lun_disable(void *arg, 156 struct ctl_id target_id, int lun_id); 157static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 158static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160static void cfiscsi_datamove(union ctl_io *io); 161static void cfiscsi_datamove_in(union ctl_io *io); 162static void cfiscsi_datamove_out(union ctl_io *io); 163static void cfiscsi_done(union ctl_io *io); 164static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 165static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 168static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 169static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 170static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 171static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 172 *softc, const char *name); 173static struct cfiscsi_target *cfiscsi_target_find_or_create( 174 struct cfiscsi_softc *softc, const char *name, const char *alias); 175static void cfiscsi_target_release(struct cfiscsi_target *ct); 176static void cfiscsi_session_delete(struct cfiscsi_session *cs); 177 178static struct cfiscsi_softc cfiscsi_softc; 179extern struct ctl_softc *control_softc; 180 181static struct ctl_frontend cfiscsi_frontend = 182{ 183 .name = "iscsi", 184 .init = cfiscsi_init, 185 .ioctl = cfiscsi_ioctl, 186}; 187CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 188MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 189 190static struct icl_pdu * 191cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 192{ 193 194 return (icl_pdu_new_bhs(request->ip_conn, flags)); 195} 196 197static bool 198cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 199{ 200 const struct iscsi_bhs_scsi_command *bhssc; 201 struct cfiscsi_session *cs; 202 uint32_t cmdsn, expstatsn; 203 204 cs = PDU_SESSION(request); 205 206 /* 207 * Every incoming PDU - not just NOP-Out - resets the ping timer. 208 * The purpose of the timeout is to reset the connection when it stalls; 209 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 210 * in some queue. 211 * 212 * XXX: Locking? 213 */ 214 cs->cs_timeout = 0; 215 216 /* 217 * Data-Out PDUs don't contain CmdSN. 218 */ 219 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 220 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 221 return (false); 222 223 /* 224 * We're only using fields common for all the request 225 * (initiator -> target) PDUs. 226 */ 227 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 228 cmdsn = ntohl(bhssc->bhssc_cmdsn); 229 expstatsn = ntohl(bhssc->bhssc_expstatsn); 230 231 CFISCSI_SESSION_LOCK(cs); 232#if 0 233 if (expstatsn != cs->cs_statsn) { 234 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 235 "while current StatSN is %d", expstatsn, 236 cs->cs_statsn); 237 } 238#endif 239 240 /* 241 * The target MUST silently ignore any non-immediate command outside 242 * of this range. 243 */ 244 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 245 CFISCSI_SESSION_UNLOCK(cs); 246 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 247 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 248 return (true); 249 } 250 251 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 252 cs->cs_cmdsn++; 253 254 CFISCSI_SESSION_UNLOCK(cs); 255 256 return (false); 257} 258 259static void 260cfiscsi_pdu_handle(struct icl_pdu *request) 261{ 262 struct cfiscsi_session *cs; 263 bool ignore; 264 265 cs = PDU_SESSION(request); 266 267 ignore = cfiscsi_pdu_update_cmdsn(request); 268 if (ignore) { 269 icl_pdu_free(request); 270 return; 271 } 272 273 /* 274 * Handle the PDU; this includes e.g. receiving the remaining 275 * part of PDU and submitting the SCSI command to CTL 276 * or queueing a reply. The handling routine is responsible 277 * for freeing the PDU when it's no longer needed. 278 */ 279 switch (request->ip_bhs->bhs_opcode & 280 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 281 case ISCSI_BHS_OPCODE_NOP_OUT: 282 cfiscsi_pdu_handle_nop_out(request); 283 break; 284 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 285 cfiscsi_pdu_handle_scsi_command(request); 286 break; 287 case ISCSI_BHS_OPCODE_TASK_REQUEST: 288 cfiscsi_pdu_handle_task_request(request); 289 break; 290 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 291 cfiscsi_pdu_handle_data_out(request); 292 break; 293 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 294 cfiscsi_pdu_handle_logout_request(request); 295 break; 296 default: 297 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 298 "opcode 0x%x; dropping connection", 299 request->ip_bhs->bhs_opcode); 300 icl_pdu_free(request); 301 cfiscsi_session_terminate(cs); 302 } 303 304} 305 306static void 307cfiscsi_receive_callback(struct icl_pdu *request) 308{ 309 struct cfiscsi_session *cs; 310 311 cs = PDU_SESSION(request); 312 313#ifdef ICL_KERNEL_PROXY 314 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 315 if (cs->cs_login_pdu == NULL) 316 cs->cs_login_pdu = request; 317 else 318 icl_pdu_free(request); 319 cv_signal(&cs->cs_login_cv); 320 return; 321 } 322#endif 323 324 cfiscsi_pdu_handle(request); 325} 326 327static void 328cfiscsi_error_callback(struct icl_conn *ic) 329{ 330 struct cfiscsi_session *cs; 331 332 cs = CONN_SESSION(ic); 333 334 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 335 cfiscsi_session_terminate(cs); 336} 337 338static int 339cfiscsi_pdu_prepare(struct icl_pdu *response) 340{ 341 struct cfiscsi_session *cs; 342 struct iscsi_bhs_scsi_response *bhssr; 343 bool advance_statsn = true; 344 345 cs = PDU_SESSION(response); 346 347 CFISCSI_SESSION_LOCK_ASSERT(cs); 348 349 /* 350 * We're only using fields common for all the response 351 * (target -> initiator) PDUs. 352 */ 353 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 354 355 /* 356 * 10.8.3: "The StatSN for this connection is not advanced 357 * after this PDU is sent." 358 */ 359 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 360 advance_statsn = false; 361 362 /* 363 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 364 * StatSN for the connection is not advanced after this PDU is sent." 365 */ 366 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 367 bhssr->bhssr_initiator_task_tag == 0xffffffff) 368 advance_statsn = false; 369 370 /* 371 * See the comment below - StatSN is not meaningful and must 372 * not be advanced. 373 */ 374 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 375 advance_statsn = false; 376 377 /* 378 * 10.7.3: "The fields StatSN, Status, and Residual Count 379 * only have meaningful content if the S bit is set to 1." 380 */ 381 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 382 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 383 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 384 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 385 386 if (advance_statsn) 387 cs->cs_statsn++; 388 389 return (0); 390} 391 392static void 393cfiscsi_pdu_queue(struct icl_pdu *response) 394{ 395 struct cfiscsi_session *cs; 396 397 cs = PDU_SESSION(response); 398 399 CFISCSI_SESSION_LOCK(cs); 400 cfiscsi_pdu_prepare(response); 401 icl_pdu_queue(response); 402 CFISCSI_SESSION_UNLOCK(cs); 403} 404 405static uint32_t 406cfiscsi_decode_lun(uint64_t encoded) 407{ 408 uint8_t lun[8]; 409 uint32_t result; 410 411 /* 412 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 413 * but is in fact an evil, multidimensional structure defined 414 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 415 */ 416 memcpy(lun, &encoded, sizeof(lun)); 417 switch (lun[0] & 0xC0) { 418 case 0x00: 419 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 420 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 421 CFISCSI_WARN("malformed LUN " 422 "(peripheral device addressing method): 0x%jx", 423 (uintmax_t)encoded); 424 result = 0xffffffff; 425 break; 426 } 427 result = lun[1]; 428 break; 429 case 0x40: 430 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 431 lun[6] != 0 || lun[7] != 0) { 432 CFISCSI_WARN("malformed LUN " 433 "(flat address space addressing method): 0x%jx", 434 (uintmax_t)encoded); 435 result = 0xffffffff; 436 break; 437 } 438 result = ((lun[0] & 0x3f) << 8) + lun[1]; 439 break; 440 case 0xC0: 441 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 442 lun[6] != 0 || lun[7] != 0) { 443 CFISCSI_WARN("malformed LUN (extended flat " 444 "address space addressing method): 0x%jx", 445 (uintmax_t)encoded); 446 result = 0xffffffff; 447 break; 448 } 449 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 450 default: 451 CFISCSI_WARN("unsupported LUN format 0x%jx", 452 (uintmax_t)encoded); 453 result = 0xffffffff; 454 break; 455 } 456 457 return (result); 458} 459 460static void 461cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 462{ 463 struct cfiscsi_session *cs; 464 struct iscsi_bhs_nop_out *bhsno; 465 struct iscsi_bhs_nop_in *bhsni; 466 struct icl_pdu *response; 467 void *data = NULL; 468 size_t datasize; 469 int error; 470 471 cs = PDU_SESSION(request); 472 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 473 474 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 475 /* 476 * Nothing to do, iscsi_pdu_update_statsn() already 477 * zeroed the timeout. 478 */ 479 icl_pdu_free(request); 480 return; 481 } 482 483 datasize = icl_pdu_data_segment_length(request); 484 if (datasize > 0) { 485 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 486 if (data == NULL) { 487 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 488 "dropping connection"); 489 icl_pdu_free(request); 490 cfiscsi_session_terminate(cs); 491 return; 492 } 493 icl_pdu_get_data(request, 0, data, datasize); 494 } 495 496 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 497 if (response == NULL) { 498 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 499 "droppping connection"); 500 free(data, M_CFISCSI); 501 icl_pdu_free(request); 502 cfiscsi_session_terminate(cs); 503 return; 504 } 505 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 506 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 507 bhsni->bhsni_flags = 0x80; 508 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 509 bhsni->bhsni_target_transfer_tag = 0xffffffff; 510 if (datasize > 0) { 511 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 512 if (error != 0) { 513 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 514 "dropping connection"); 515 free(data, M_CFISCSI); 516 icl_pdu_free(request); 517 icl_pdu_free(response); 518 cfiscsi_session_terminate(cs); 519 return; 520 } 521 free(data, M_CFISCSI); 522 } 523 524 icl_pdu_free(request); 525 cfiscsi_pdu_queue(response); 526} 527 528static void 529cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 530{ 531 struct iscsi_bhs_scsi_command *bhssc; 532 struct cfiscsi_session *cs; 533 union ctl_io *io; 534 int error; 535 536 cs = PDU_SESSION(request); 537 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 538 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 539 // bhssc->bhssc_initiator_task_tag); 540 541 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 542 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 543 "ImmediateData=No; dropping connection"); 544 icl_pdu_free(request); 545 cfiscsi_session_terminate(cs); 546 return; 547 } 548 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 549 if (io == NULL) { 550 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 551 "dropping connection"); 552 icl_pdu_free(request); 553 cfiscsi_session_terminate(cs); 554 return; 555 } 556 ctl_zero_io(io); 557 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 558 io->io_hdr.io_type = CTL_IO_SCSI; 559 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 560 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 561 io->io_hdr.nexus.targ_target.id = 0; 562 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 563 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 564 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 565 case BHSSC_FLAGS_ATTR_UNTAGGED: 566 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 567 break; 568 case BHSSC_FLAGS_ATTR_SIMPLE: 569 io->scsiio.tag_type = CTL_TAG_SIMPLE; 570 break; 571 case BHSSC_FLAGS_ATTR_ORDERED: 572 io->scsiio.tag_type = CTL_TAG_ORDERED; 573 break; 574 case BHSSC_FLAGS_ATTR_HOQ: 575 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 576 break; 577 case BHSSC_FLAGS_ATTR_ACA: 578 io->scsiio.tag_type = CTL_TAG_ACA; 579 break; 580 default: 581 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 582 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 583 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 584 break; 585 } 586 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 587 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 588 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 589 error = ctl_queue(io); 590 if (error != CTL_RETVAL_COMPLETE) { 591 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 592 "dropping connection", error); 593 ctl_free_io(io); 594 refcount_release(&cs->cs_outstanding_ctl_pdus); 595 icl_pdu_free(request); 596 cfiscsi_session_terminate(cs); 597 } 598} 599 600static void 601cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 602{ 603 struct iscsi_bhs_task_management_request *bhstmr; 604 struct iscsi_bhs_task_management_response *bhstmr2; 605 struct icl_pdu *response; 606 struct cfiscsi_session *cs; 607 union ctl_io *io; 608 int error; 609 610 cs = PDU_SESSION(request); 611 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 612 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 613 if (io == NULL) { 614 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 615 "dropping connection"); 616 icl_pdu_free(request); 617 cfiscsi_session_terminate(cs); 618 return; 619 } 620 ctl_zero_io(io); 621 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 622 io->io_hdr.io_type = CTL_IO_TASK; 623 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 624 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 625 io->io_hdr.nexus.targ_target.id = 0; 626 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 627 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 628 629 switch (bhstmr->bhstmr_function & ~0x80) { 630 case BHSTMR_FUNCTION_ABORT_TASK: 631#if 0 632 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 633#endif 634 io->taskio.task_action = CTL_TASK_ABORT_TASK; 635 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 636 break; 637 case BHSTMR_FUNCTION_ABORT_TASK_SET: 638#if 0 639 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 640#endif 641 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 642 break; 643 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 644#if 0 645 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 646#endif 647 io->taskio.task_action = CTL_TASK_LUN_RESET; 648 break; 649 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 650#if 0 651 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 652#endif 653 io->taskio.task_action = CTL_TASK_TARGET_RESET; 654 break; 655 default: 656 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 657 bhstmr->bhstmr_function & ~0x80); 658 ctl_free_io(io); 659 660 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 661 if (response == NULL) { 662 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 663 "dropping connection"); 664 icl_pdu_free(request); 665 cfiscsi_session_terminate(cs); 666 return; 667 } 668 bhstmr2 = (struct iscsi_bhs_task_management_response *) 669 response->ip_bhs; 670 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 671 bhstmr2->bhstmr_flags = 0x80; 672 bhstmr2->bhstmr_response = 673 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 674 bhstmr2->bhstmr_initiator_task_tag = 675 bhstmr->bhstmr_initiator_task_tag; 676 icl_pdu_free(request); 677 cfiscsi_pdu_queue(response); 678 return; 679 } 680 681 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 682 error = ctl_queue(io); 683 if (error != CTL_RETVAL_COMPLETE) { 684 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 685 "dropping connection", error); 686 ctl_free_io(io); 687 refcount_release(&cs->cs_outstanding_ctl_pdus); 688 icl_pdu_free(request); 689 cfiscsi_session_terminate(cs); 690 } 691} 692 693static bool 694cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 695{ 696 struct iscsi_bhs_data_out *bhsdo; 697 struct cfiscsi_session *cs; 698 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 699 size_t copy_len, len, off, buffer_offset; 700 int ctl_sg_count; 701 union ctl_io *io; 702 703 cs = PDU_SESSION(request); 704 705 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 706 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 707 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 708 ISCSI_BHS_OPCODE_SCSI_COMMAND, 709 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 710 711 /* 712 * We're only using fields common for Data-Out and SCSI Command PDUs. 713 */ 714 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 715 716 io = cdw->cdw_ctl_io; 717 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 718 ("CTL_FLAG_DATA_IN")); 719 720#if 0 721 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 722 request->ip_data_len, io->scsiio.kern_total_len); 723#endif 724 725 if (io->scsiio.kern_sg_entries > 0) { 726 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 727 ctl_sg_count = io->scsiio.kern_sg_entries; 728 } else { 729 ctl_sglist = &ctl_sg_entry; 730 ctl_sglist->addr = io->scsiio.kern_data_ptr; 731 ctl_sglist->len = io->scsiio.kern_data_len; 732 ctl_sg_count = 1; 733 } 734 735 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 736 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 737 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 738 else 739 buffer_offset = 0; 740 len = icl_pdu_data_segment_length(request); 741 742 /* 743 * Make sure the offset, as sent by the initiator, matches the offset 744 * we're supposed to be at in the scatter-gather list. 745 */ 746 if (buffer_offset > 747 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 748 buffer_offset + len <= 749 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 750 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 751 "expected %zd; dropping connection", buffer_offset, 752 (size_t)io->scsiio.kern_rel_offset + 753 (size_t)io->scsiio.ext_data_filled); 754 ctl_set_data_phase_error(&io->scsiio); 755 cfiscsi_session_terminate(cs); 756 return (true); 757 } 758 759 /* 760 * This is the offset within the PDU data segment, as opposed 761 * to buffer_offset, which is the offset within the task (SCSI 762 * command). 763 */ 764 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 765 buffer_offset; 766 767 /* 768 * Iterate over the scatter/gather segments, filling them with data 769 * from the PDU data segment. Note that this can get called multiple 770 * times for one SCSI command; the cdw structure holds state for the 771 * scatter/gather list. 772 */ 773 for (;;) { 774 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 775 ("cdw->cdw_sg_index >= ctl_sg_count")); 776 if (cdw->cdw_sg_len == 0) { 777 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 778 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 779 } 780 KASSERT(off <= len, ("len > off")); 781 copy_len = len - off; 782 if (copy_len > cdw->cdw_sg_len) 783 copy_len = cdw->cdw_sg_len; 784 785 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 786 cdw->cdw_sg_addr += copy_len; 787 cdw->cdw_sg_len -= copy_len; 788 off += copy_len; 789 io->scsiio.ext_data_filled += copy_len; 790 791 if (cdw->cdw_sg_len == 0) { 792 /* 793 * End of current segment. 794 */ 795 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 796 /* 797 * Last segment in scatter/gather list. 798 */ 799 break; 800 } 801 cdw->cdw_sg_index++; 802 } 803 804 if (off == len) { 805 /* 806 * End of PDU payload. 807 */ 808 break; 809 } 810 } 811 812 if (len > off) { 813 /* 814 * In case of unsolicited data, it's possible that the buffer 815 * provided by CTL is smaller than negotiated FirstBurstLength. 816 * Just ignore the superfluous data; will ask for them with R2T 817 * on next call to cfiscsi_datamove(). 818 * 819 * This obviously can only happen with SCSI Command PDU. 820 */ 821 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 822 ISCSI_BHS_OPCODE_SCSI_COMMAND) 823 return (true); 824 825 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 826 "expected %zd; dropping connection", 827 icl_pdu_data_segment_length(request), off); 828 ctl_set_data_phase_error(&io->scsiio); 829 cfiscsi_session_terminate(cs); 830 return (true); 831 } 832 833 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 834 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 835 CFISCSI_SESSION_WARN(cs, "got the final packet without " 836 "the F flag; flags = 0x%x; dropping connection", 837 bhsdo->bhsdo_flags); 838 ctl_set_data_phase_error(&io->scsiio); 839 cfiscsi_session_terminate(cs); 840 return (true); 841 } 842 843 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 844 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 845 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 846 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 847 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 848 "transmitted size was %zd bytes instead of %d; " 849 "dropping connection", 850 (size_t)io->scsiio.ext_data_filled, 851 cdw->cdw_r2t_end); 852 ctl_set_data_phase_error(&io->scsiio); 853 cfiscsi_session_terminate(cs); 854 return (true); 855 } else { 856 /* 857 * For SCSI Command PDU, this just means we need to 858 * solicit more data by sending R2T. 859 */ 860 return (false); 861 } 862 } 863 864 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 865#if 0 866 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 867 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 868#endif 869 870 return (true); 871 } 872 873 return (false); 874} 875 876static void 877cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 878{ 879 struct iscsi_bhs_data_out *bhsdo; 880 struct cfiscsi_session *cs; 881 struct cfiscsi_data_wait *cdw = NULL; 882 union ctl_io *io; 883 bool done; 884 885 cs = PDU_SESSION(request); 886 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 887 888 CFISCSI_SESSION_LOCK(cs); 889 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 890#if 0 891 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 892 "ttt 0x%x, itt 0x%x", 893 bhsdo->bhsdo_target_transfer_tag, 894 bhsdo->bhsdo_initiator_task_tag, 895 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 896#endif 897 if (bhsdo->bhsdo_target_transfer_tag == 898 cdw->cdw_target_transfer_tag) 899 break; 900 } 901 CFISCSI_SESSION_UNLOCK(cs); 902 if (cdw == NULL) { 903 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 904 "0x%x, not found; dropping connection", 905 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 906 icl_pdu_free(request); 907 cfiscsi_session_terminate(cs); 908 return; 909 } 910 911 io = cdw->cdw_ctl_io; 912 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 913 ("CTL_FLAG_DATA_IN")); 914 915 done = cfiscsi_handle_data_segment(request, cdw); 916 if (done) { 917 CFISCSI_SESSION_LOCK(cs); 918 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 919 CFISCSI_SESSION_UNLOCK(cs); 920 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 921 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 922 uma_zfree(cfiscsi_data_wait_zone, cdw); 923 if (done) 924 io->scsiio.be_move_done(io); 925 else 926 cfiscsi_datamove_out(io); 927 } 928 929 icl_pdu_free(request); 930} 931 932static void 933cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 934{ 935 struct iscsi_bhs_logout_request *bhslr; 936 struct iscsi_bhs_logout_response *bhslr2; 937 struct icl_pdu *response; 938 struct cfiscsi_session *cs; 939 940 cs = PDU_SESSION(request); 941 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 942 switch (bhslr->bhslr_reason & 0x7f) { 943 case BHSLR_REASON_CLOSE_SESSION: 944 case BHSLR_REASON_CLOSE_CONNECTION: 945 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 946 if (response == NULL) { 947 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 948 icl_pdu_free(request); 949 cfiscsi_session_terminate(cs); 950 return; 951 } 952 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 953 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 954 bhslr2->bhslr_flags = 0x80; 955 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 956 bhslr2->bhslr_initiator_task_tag = 957 bhslr->bhslr_initiator_task_tag; 958 icl_pdu_free(request); 959 cfiscsi_pdu_queue(response); 960 cfiscsi_session_terminate(cs); 961 break; 962 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 963 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 964 if (response == NULL) { 965 CFISCSI_SESSION_WARN(cs, 966 "failed to allocate memory; dropping connection"); 967 icl_pdu_free(request); 968 cfiscsi_session_terminate(cs); 969 return; 970 } 971 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 972 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 973 bhslr2->bhslr_flags = 0x80; 974 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 975 bhslr2->bhslr_initiator_task_tag = 976 bhslr->bhslr_initiator_task_tag; 977 icl_pdu_free(request); 978 cfiscsi_pdu_queue(response); 979 break; 980 default: 981 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 982 bhslr->bhslr_reason); 983 icl_pdu_free(request); 984 cfiscsi_session_terminate(cs); 985 break; 986 } 987} 988 989static void 990cfiscsi_callout(void *context) 991{ 992 struct icl_pdu *cp; 993 struct iscsi_bhs_nop_in *bhsni; 994 struct cfiscsi_session *cs; 995 996 cs = context; 997 998 if (cs->cs_terminating) 999 return; 1000 1001 callout_schedule(&cs->cs_callout, 1 * hz); 1002 1003 atomic_add_int(&cs->cs_timeout, 1); 1004 1005#ifdef ICL_KERNEL_PROXY 1006 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1007 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1008 CFISCSI_SESSION_WARN(cs, "login timed out after " 1009 "%d seconds; dropping connection", cs->cs_timeout); 1010 cfiscsi_session_terminate(cs); 1011 } 1012 return; 1013 } 1014#endif 1015 1016 if (ping_timeout <= 0) { 1017 /* 1018 * Pings are disabled. Don't send NOP-In in this case; 1019 * user might have disabled pings to work around problems 1020 * with certain initiators that can't properly handle 1021 * NOP-In, such as iPXE. Reset the timeout, to avoid 1022 * triggering reconnection, should the user decide to 1023 * reenable them. 1024 */ 1025 cs->cs_timeout = 0; 1026 return; 1027 } 1028 1029 if (cs->cs_timeout >= ping_timeout) { 1030 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1031 "dropping connection", ping_timeout); 1032 cfiscsi_session_terminate(cs); 1033 return; 1034 } 1035 1036 /* 1037 * If the ping was reset less than one second ago - which means 1038 * that we've received some PDU during the last second - assume 1039 * the traffic flows correctly and don't bother sending a NOP-Out. 1040 * 1041 * (It's 2 - one for one second, and one for incrementing is_timeout 1042 * earlier in this routine.) 1043 */ 1044 if (cs->cs_timeout < 2) 1045 return; 1046 1047 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1048 if (cp == NULL) { 1049 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1050 return; 1051 } 1052 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1053 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1054 bhsni->bhsni_flags = 0x80; 1055 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1056 1057 cfiscsi_pdu_queue(cp); 1058} 1059 1060static void 1061cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1062{ 1063 struct cfiscsi_data_wait *cdw; 1064 union ctl_io *io; 1065 int error, last, wait; 1066 1067 if (cs->cs_target == NULL) 1068 return; /* No target yet, so nothing to do. */ 1069 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1070 if (io == NULL) { 1071 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1072 return; 1073 } 1074 ctl_zero_io(io); 1075 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1076 io->io_hdr.io_type = CTL_IO_TASK; 1077 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1078 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1079 io->io_hdr.nexus.targ_target.id = 0; 1080 io->io_hdr.nexus.targ_lun = 0; 1081 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1082 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1083 wait = cs->cs_outstanding_ctl_pdus; 1084 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1085 error = ctl_queue(io); 1086 if (error != CTL_RETVAL_COMPLETE) { 1087 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1088 refcount_release(&cs->cs_outstanding_ctl_pdus); 1089 ctl_free_io(io); 1090 } 1091 1092 CFISCSI_SESSION_LOCK(cs); 1093 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1094 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1095 CFISCSI_SESSION_UNLOCK(cs); 1096 /* 1097 * Set nonzero port status; this prevents backends from 1098 * assuming that the data transfer actually succeeded 1099 * and writing uninitialized data to disk. 1100 */ 1101 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1102 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1103 uma_zfree(cfiscsi_data_wait_zone, cdw); 1104 CFISCSI_SESSION_LOCK(cs); 1105 } 1106 CFISCSI_SESSION_UNLOCK(cs); 1107 1108 /* 1109 * Wait for CTL to terminate all the tasks. 1110 */ 1111 if (wait > 0) 1112 CFISCSI_SESSION_WARN(cs, 1113 "waiting for CTL to terminate %d tasks", wait); 1114 for (;;) { 1115 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1116 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1117 if (last != 0) 1118 break; 1119 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1120 0, "cfiscsi_terminate", hz / 100); 1121 } 1122 if (wait > 0) 1123 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1124} 1125 1126static void 1127cfiscsi_maintenance_thread(void *arg) 1128{ 1129 struct cfiscsi_session *cs; 1130 1131 cs = arg; 1132 1133 for (;;) { 1134 CFISCSI_SESSION_LOCK(cs); 1135 if (cs->cs_terminating == false) 1136 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1137 CFISCSI_SESSION_UNLOCK(cs); 1138 1139 if (cs->cs_terminating) { 1140 1141 /* 1142 * We used to wait up to 30 seconds to deliver queued 1143 * PDUs to the initiator. We also tried hard to deliver 1144 * SCSI Responses for the aborted PDUs. We don't do 1145 * that anymore. We might need to revisit that. 1146 */ 1147 callout_drain(&cs->cs_callout); 1148 icl_conn_close(cs->cs_conn); 1149 1150 /* 1151 * At this point ICL receive thread is no longer 1152 * running; no new tasks can be queued. 1153 */ 1154 cfiscsi_session_terminate_tasks(cs); 1155 cfiscsi_session_delete(cs); 1156 kthread_exit(); 1157 return; 1158 } 1159 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1160 } 1161} 1162 1163static void 1164cfiscsi_session_terminate(struct cfiscsi_session *cs) 1165{ 1166 1167 if (cs->cs_terminating) 1168 return; 1169 cs->cs_terminating = true; 1170 cv_signal(&cs->cs_maintenance_cv); 1171#ifdef ICL_KERNEL_PROXY 1172 cv_signal(&cs->cs_login_cv); 1173#endif 1174} 1175 1176static int 1177cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1178{ 1179 struct cfiscsi_target *ct; 1180 char *name; 1181 int i; 1182 1183 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1184 1185 ct = cs->cs_target; 1186 name = strdup(cs->cs_initiator_id, M_CTL); 1187 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1188 if (i < 0) { 1189 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1190 i); 1191 cs->cs_ctl_initid = -1; 1192 return (1); 1193 } 1194 cs->cs_ctl_initid = i; 1195#if 0 1196 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1197#endif 1198 1199 return (0); 1200} 1201 1202static void 1203cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1204{ 1205 int error; 1206 1207 if (cs->cs_ctl_initid == -1) 1208 return; 1209 1210 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1211 if (error != 0) { 1212 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1213 error); 1214 } 1215 cs->cs_ctl_initid = -1; 1216} 1217 1218static struct cfiscsi_session * 1219cfiscsi_session_new(struct cfiscsi_softc *softc) 1220{ 1221 struct cfiscsi_session *cs; 1222 int error; 1223 1224 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1225 if (cs == NULL) { 1226 CFISCSI_WARN("malloc failed"); 1227 return (NULL); 1228 } 1229 cs->cs_ctl_initid = -1; 1230 1231 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1232 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1233 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1234 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1235#ifdef ICL_KERNEL_PROXY 1236 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1237#endif 1238 1239 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1240 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1241 cs->cs_conn->ic_error = cfiscsi_error_callback; 1242 cs->cs_conn->ic_prv0 = cs; 1243 1244 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1245 if (error != 0) { 1246 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1247 free(cs, M_CFISCSI); 1248 return (NULL); 1249 } 1250 1251 mtx_lock(&softc->lock); 1252 cs->cs_id = ++softc->last_session_id; 1253 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1254 mtx_unlock(&softc->lock); 1255 1256 /* 1257 * Start pinging the initiator. 1258 */ 1259 callout_init(&cs->cs_callout, 1); 1260 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1261 1262 return (cs); 1263} 1264 1265static void 1266cfiscsi_session_delete(struct cfiscsi_session *cs) 1267{ 1268 struct cfiscsi_softc *softc; 1269 1270 softc = &cfiscsi_softc; 1271 1272 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1273 ("destroying session with outstanding CTL pdus")); 1274 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1275 ("destroying session with non-empty queue")); 1276 1277 cfiscsi_session_unregister_initiator(cs); 1278 if (cs->cs_target != NULL) 1279 cfiscsi_target_release(cs->cs_target); 1280 icl_conn_close(cs->cs_conn); 1281 icl_conn_free(cs->cs_conn); 1282 1283 mtx_lock(&softc->lock); 1284 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1285 cv_signal(&softc->sessions_cv); 1286 mtx_unlock(&softc->lock); 1287 1288 free(cs, M_CFISCSI); 1289} 1290 1291int 1292cfiscsi_init(void) 1293{ 1294 struct cfiscsi_softc *softc; 1295 int retval; 1296 1297 softc = &cfiscsi_softc; 1298 retval = 0; 1299 bzero(softc, sizeof(*softc)); 1300 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1301 1302 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 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 do { 1388 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1389 if (cs->cs_target == ct) 1390 break; 1391 } 1392 if (cs != NULL) 1393 cv_wait(&softc->sessions_cv, &softc->lock); 1394 } while (cs != NULL && ct->ct_online == 0); 1395 mtx_unlock(&softc->lock); 1396 if (online > 0) 1397 return; 1398 1399#ifdef ICL_KERNEL_PROXY 1400 icl_listen_free(softc->listener); 1401 softc->listener = NULL; 1402#endif 1403} 1404 1405static int 1406cfiscsi_info(void *arg, struct sbuf *sb) 1407{ 1408 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1409 int retval; 1410 1411 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1412 ct->ct_state); 1413 return (retval); 1414} 1415 1416static void 1417cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1418{ 1419 struct cfiscsi_softc *softc; 1420 struct cfiscsi_session *cs, *cs2; 1421 struct cfiscsi_target *ct; 1422 struct ctl_iscsi_handoff_params *cihp; 1423 int error; 1424 1425 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1426 softc = &cfiscsi_softc; 1427 1428 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1429 cihp->initiator_name, cihp->initiator_addr, 1430 cihp->target_name); 1431 1432 ct = cfiscsi_target_find(softc, cihp->target_name); 1433 if (ct == NULL) { 1434 ci->status = CTL_ISCSI_ERROR; 1435 snprintf(ci->error_str, sizeof(ci->error_str), 1436 "%s: target not found", __func__); 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->connection_id) 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 1477 /* 1478 * First PDU of Full Feature phase has the same CmdSN as the last 1479 * PDU from the Login Phase received from the initiator. Thus, 1480 * the -1 below. 1481 */ 1482 cs->cs_portal_group_tag = cihp->portal_group_tag; 1483 cs->cs_cmdsn = cihp->cmdsn; 1484 cs->cs_statsn = cihp->statsn; 1485 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1486 cs->cs_max_burst_length = cihp->max_burst_length; 1487 cs->cs_immediate_data = !!cihp->immediate_data; 1488 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1489 cs->cs_conn->ic_header_crc32c = true; 1490 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1491 cs->cs_conn->ic_data_crc32c = true; 1492 1493 strlcpy(cs->cs_initiator_name, 1494 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1495 strlcpy(cs->cs_initiator_addr, 1496 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1497 strlcpy(cs->cs_initiator_alias, 1498 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1499 memcpy(cs->cs_initiator_isid, 1500 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1501 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1502 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1503 cihp->initiator_isid[0], cihp->initiator_isid[1], 1504 cihp->initiator_isid[2], cihp->initiator_isid[3], 1505 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1506 1507 mtx_lock(&softc->lock); 1508 if (ct->ct_online == 0) { 1509 mtx_unlock(&softc->lock); 1510 cfiscsi_session_terminate(cs); 1511 cfiscsi_target_release(ct); 1512 ci->status = CTL_ISCSI_ERROR; 1513 snprintf(ci->error_str, sizeof(ci->error_str), 1514 "%s: port offline", __func__); 1515 return; 1516 } 1517 cs->cs_target = ct; 1518 mtx_unlock(&softc->lock); 1519 1520 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1521restart: 1522 if (!cs->cs_terminating) { 1523 mtx_lock(&softc->lock); 1524 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1525 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1526 cs->cs_target == cs2->cs_target && 1527 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1528 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1529 cfiscsi_session_terminate(cs2); 1530 mtx_unlock(&softc->lock); 1531 pause("cfiscsi_reinstate", 1); 1532 goto restart; 1533 } 1534 } 1535 mtx_unlock(&softc->lock); 1536 } 1537 1538 /* 1539 * Register initiator with CTL. 1540 */ 1541 cfiscsi_session_register_initiator(cs); 1542 1543#ifdef ICL_KERNEL_PROXY 1544 if (cihp->socket > 0) { 1545#endif 1546 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1547 if (error != 0) { 1548 cfiscsi_session_terminate(cs); 1549 refcount_release(&cs->cs_outstanding_ctl_pdus); 1550 ci->status = CTL_ISCSI_ERROR; 1551 snprintf(ci->error_str, sizeof(ci->error_str), 1552 "%s: icl_conn_handoff failed with error %d", 1553 __func__, error); 1554 return; 1555 } 1556#ifdef ICL_KERNEL_PROXY 1557 } 1558#endif 1559 1560#ifdef ICL_KERNEL_PROXY 1561 cs->cs_login_phase = false; 1562 1563 /* 1564 * First PDU of the Full Feature phase has likely already arrived. 1565 * We have to pick it up and execute properly. 1566 */ 1567 if (cs->cs_login_pdu != NULL) { 1568 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1569 cfiscsi_pdu_handle(cs->cs_login_pdu); 1570 cs->cs_login_pdu = NULL; 1571 } 1572#endif 1573 1574 refcount_release(&cs->cs_outstanding_ctl_pdus); 1575 ci->status = CTL_ISCSI_OK; 1576} 1577 1578static void 1579cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1580{ 1581 struct ctl_iscsi_list_params *cilp; 1582 struct cfiscsi_session *cs; 1583 struct cfiscsi_softc *softc; 1584 struct sbuf *sb; 1585 int error; 1586 1587 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1588 softc = &cfiscsi_softc; 1589 1590 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1591 if (sb == NULL) { 1592 ci->status = CTL_ISCSI_ERROR; 1593 snprintf(ci->error_str, sizeof(ci->error_str), 1594 "Unable to allocate %d bytes for iSCSI session list", 1595 cilp->alloc_len); 1596 return; 1597 } 1598 1599 sbuf_printf(sb, "<ctlislist>\n"); 1600 mtx_lock(&softc->lock); 1601 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1602#ifdef ICL_KERNEL_PROXY 1603 if (cs->cs_target == NULL) 1604 continue; 1605#endif 1606 error = sbuf_printf(sb, "<connection id=\"%d\">" 1607 "<initiator>%s</initiator>" 1608 "<initiator_addr>%s</initiator_addr>" 1609 "<initiator_alias>%s</initiator_alias>" 1610 "<target>%s</target>" 1611 "<target_alias>%s</target_alias>" 1612 "<header_digest>%s</header_digest>" 1613 "<data_digest>%s</data_digest>" 1614 "<max_data_segment_length>%zd</max_data_segment_length>" 1615 "<immediate_data>%d</immediate_data>" 1616 "<iser>%d</iser>" 1617 "</connection>\n", 1618 cs->cs_id, 1619 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1620 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1621 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1622 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1623 cs->cs_max_data_segment_length, 1624 cs->cs_immediate_data, 1625 cs->cs_conn->ic_iser); 1626 if (error != 0) 1627 break; 1628 } 1629 mtx_unlock(&softc->lock); 1630 error = sbuf_printf(sb, "</ctlislist>\n"); 1631 if (error != 0) { 1632 sbuf_delete(sb); 1633 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1634 snprintf(ci->error_str, sizeof(ci->error_str), 1635 "Out of space, %d bytes is too small", cilp->alloc_len); 1636 return; 1637 } 1638 sbuf_finish(sb); 1639 1640 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1641 cilp->fill_len = sbuf_len(sb) + 1; 1642 ci->status = CTL_ISCSI_OK; 1643 sbuf_delete(sb); 1644} 1645 1646static void 1647cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1648{ 1649 struct icl_pdu *response; 1650 struct iscsi_bhs_asynchronous_message *bhsam; 1651 struct ctl_iscsi_terminate_params *citp; 1652 struct cfiscsi_session *cs; 1653 struct cfiscsi_softc *softc; 1654 int found = 0; 1655 1656 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1657 softc = &cfiscsi_softc; 1658 1659 mtx_lock(&softc->lock); 1660 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1661 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1662 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1663 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1664 continue; 1665 1666 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1667 if (response == NULL) { 1668 /* 1669 * Oh well. Just terminate the connection. 1670 */ 1671 } else { 1672 bhsam = (struct iscsi_bhs_asynchronous_message *) 1673 response->ip_bhs; 1674 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1675 bhsam->bhsam_flags = 0x80; 1676 bhsam->bhsam_0xffffffff = 0xffffffff; 1677 bhsam->bhsam_async_event = 1678 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1679 cfiscsi_pdu_queue(response); 1680 } 1681 cfiscsi_session_terminate(cs); 1682 found++; 1683 } 1684 mtx_unlock(&softc->lock); 1685 1686 if (found == 0) { 1687 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1688 snprintf(ci->error_str, sizeof(ci->error_str), 1689 "No matching connections found"); 1690 return; 1691 } 1692 1693 ci->status = CTL_ISCSI_OK; 1694} 1695 1696static void 1697cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1698{ 1699 struct icl_pdu *response; 1700 struct iscsi_bhs_asynchronous_message *bhsam; 1701 struct ctl_iscsi_logout_params *cilp; 1702 struct cfiscsi_session *cs; 1703 struct cfiscsi_softc *softc; 1704 int found = 0; 1705 1706 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1707 softc = &cfiscsi_softc; 1708 1709 mtx_lock(&softc->lock); 1710 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1711 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1712 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1713 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1714 continue; 1715 1716 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1717 if (response == NULL) { 1718 ci->status = CTL_ISCSI_ERROR; 1719 snprintf(ci->error_str, sizeof(ci->error_str), 1720 "Unable to allocate memory"); 1721 mtx_unlock(&softc->lock); 1722 return; 1723 } 1724 bhsam = 1725 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1726 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1727 bhsam->bhsam_flags = 0x80; 1728 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1729 bhsam->bhsam_parameter3 = htons(10); 1730 cfiscsi_pdu_queue(response); 1731 found++; 1732 } 1733 mtx_unlock(&softc->lock); 1734 1735 if (found == 0) { 1736 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1737 snprintf(ci->error_str, sizeof(ci->error_str), 1738 "No matching connections found"); 1739 return; 1740 } 1741 1742 ci->status = CTL_ISCSI_OK; 1743} 1744 1745#ifdef ICL_KERNEL_PROXY 1746static void 1747cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1748{ 1749 struct ctl_iscsi_listen_params *cilp; 1750 struct sockaddr *sa; 1751 int error; 1752 1753 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1754 1755 if (cfiscsi_softc.listener == NULL) { 1756 CFISCSI_DEBUG("no listener"); 1757 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1758 ci->status = CTL_ISCSI_ERROR; 1759 return; 1760 } 1761 1762 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1763 if (error != 0) { 1764 CFISCSI_DEBUG("getsockaddr, error %d", error); 1765 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1766 ci->status = CTL_ISCSI_ERROR; 1767 return; 1768 } 1769 1770 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1771 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1772 if (error != 0) { 1773 free(sa, M_SONAME); 1774 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1775 snprintf(ci->error_str, sizeof(ci->error_str), 1776 "icl_listen_add failed, error %d", error); 1777 ci->status = CTL_ISCSI_ERROR; 1778 return; 1779 } 1780 1781 ci->status = CTL_ISCSI_OK; 1782} 1783 1784static void 1785cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1786{ 1787 struct ctl_iscsi_accept_params *ciap; 1788 struct cfiscsi_session *cs; 1789 int error; 1790 1791 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1792 1793 mtx_lock(&cfiscsi_softc.lock); 1794 for (;;) { 1795 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1796 if (cs->cs_waiting_for_ctld) 1797 break; 1798 } 1799 if (cs != NULL) 1800 break; 1801 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1802 if (error != 0) { 1803 mtx_unlock(&cfiscsi_softc.lock); 1804 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1805 ci->status = CTL_ISCSI_ERROR; 1806 return; 1807 } 1808 } 1809 mtx_unlock(&cfiscsi_softc.lock); 1810 1811 cs->cs_waiting_for_ctld = false; 1812 cs->cs_login_phase = true; 1813 1814 ciap->connection_id = cs->cs_id; 1815 ciap->portal_id = cs->cs_portal_id; 1816 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1817 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1818 cs->cs_initiator_sa->sa_len); 1819 if (error != 0) { 1820 snprintf(ci->error_str, sizeof(ci->error_str), 1821 "copyout failed with error %d", error); 1822 ci->status = CTL_ISCSI_ERROR; 1823 return; 1824 } 1825 1826 ci->status = CTL_ISCSI_OK; 1827} 1828 1829static void 1830cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1831{ 1832 struct ctl_iscsi_send_params *cisp; 1833 struct cfiscsi_session *cs; 1834 struct icl_pdu *ip; 1835 size_t datalen; 1836 void *data; 1837 int error; 1838 1839 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1840 1841 mtx_lock(&cfiscsi_softc.lock); 1842 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1843 if (cs->cs_id == cisp->connection_id) 1844 break; 1845 } 1846 if (cs == NULL) { 1847 mtx_unlock(&cfiscsi_softc.lock); 1848 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1849 ci->status = CTL_ISCSI_ERROR; 1850 return; 1851 } 1852 mtx_unlock(&cfiscsi_softc.lock); 1853 1854#if 0 1855 if (cs->cs_login_phase == false) 1856 return (EBUSY); 1857#endif 1858 1859 if (cs->cs_terminating) { 1860 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1861 ci->status = CTL_ISCSI_ERROR; 1862 return; 1863 } 1864 1865 datalen = cisp->data_segment_len; 1866 /* 1867 * XXX 1868 */ 1869 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1870 if (datalen > 65535) { 1871 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1872 ci->status = CTL_ISCSI_ERROR; 1873 return; 1874 } 1875 if (datalen > 0) { 1876 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1877 error = copyin(cisp->data_segment, data, datalen); 1878 if (error != 0) { 1879 free(data, M_CFISCSI); 1880 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1881 ci->status = CTL_ISCSI_ERROR; 1882 return; 1883 } 1884 } 1885 1886 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1887 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1888 if (datalen > 0) { 1889 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1890 free(data, M_CFISCSI); 1891 } 1892 CFISCSI_SESSION_LOCK(cs); 1893 icl_pdu_queue(ip); 1894 CFISCSI_SESSION_UNLOCK(cs); 1895 ci->status = CTL_ISCSI_OK; 1896} 1897 1898static void 1899cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1900{ 1901 struct ctl_iscsi_receive_params *cirp; 1902 struct cfiscsi_session *cs; 1903 struct icl_pdu *ip; 1904 void *data; 1905 int error; 1906 1907 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1908 1909 mtx_lock(&cfiscsi_softc.lock); 1910 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1911 if (cs->cs_id == cirp->connection_id) 1912 break; 1913 } 1914 if (cs == NULL) { 1915 mtx_unlock(&cfiscsi_softc.lock); 1916 snprintf(ci->error_str, sizeof(ci->error_str), 1917 "connection not found"); 1918 ci->status = CTL_ISCSI_ERROR; 1919 return; 1920 } 1921 mtx_unlock(&cfiscsi_softc.lock); 1922 1923#if 0 1924 if (is->is_login_phase == false) 1925 return (EBUSY); 1926#endif 1927 1928 CFISCSI_SESSION_LOCK(cs); 1929 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1930 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1931 if (error != 0) { 1932 CFISCSI_SESSION_UNLOCK(cs); 1933 snprintf(ci->error_str, sizeof(ci->error_str), 1934 "interrupted by signal"); 1935 ci->status = CTL_ISCSI_ERROR; 1936 return; 1937 } 1938 } 1939 1940 if (cs->cs_terminating) { 1941 CFISCSI_SESSION_UNLOCK(cs); 1942 snprintf(ci->error_str, sizeof(ci->error_str), 1943 "connection terminating"); 1944 ci->status = CTL_ISCSI_ERROR; 1945 return; 1946 } 1947 ip = cs->cs_login_pdu; 1948 cs->cs_login_pdu = NULL; 1949 CFISCSI_SESSION_UNLOCK(cs); 1950 1951 if (ip->ip_data_len > cirp->data_segment_len) { 1952 icl_pdu_free(ip); 1953 snprintf(ci->error_str, sizeof(ci->error_str), 1954 "data segment too big"); 1955 ci->status = CTL_ISCSI_ERROR; 1956 return; 1957 } 1958 1959 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1960 if (ip->ip_data_len > 0) { 1961 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1962 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1963 copyout(data, cirp->data_segment, ip->ip_data_len); 1964 free(data, M_CFISCSI); 1965 } 1966 1967 icl_pdu_free(ip); 1968 ci->status = CTL_ISCSI_OK; 1969} 1970 1971#endif /* !ICL_KERNEL_PROXY */ 1972 1973static void 1974cfiscsi_ioctl_port_create(struct ctl_req *req) 1975{ 1976 struct cfiscsi_target *ct; 1977 struct ctl_port *port; 1978 const char *target, *alias, *tag; 1979 struct scsi_vpd_id_descriptor *desc; 1980 ctl_options_t opts; 1981 int retval, len, idlen; 1982 1983 ctl_init_opts(&opts, req->num_args, req->kern_args); 1984 target = ctl_get_opt(&opts, "cfiscsi_target"); 1985 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1986 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1987 if (target == NULL || tag == NULL) { 1988 req->status = CTL_LUN_ERROR; 1989 snprintf(req->error_str, sizeof(req->error_str), 1990 "Missing required argument"); 1991 ctl_free_opts(&opts); 1992 return; 1993 } 1994 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1995 if (ct == NULL) { 1996 req->status = CTL_LUN_ERROR; 1997 snprintf(req->error_str, sizeof(req->error_str), 1998 "failed to create target \"%s\"", target); 1999 ctl_free_opts(&opts); 2000 return; 2001 } 2002 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2003 req->status = CTL_LUN_ERROR; 2004 snprintf(req->error_str, sizeof(req->error_str), 2005 "target \"%s\" already exists", target); 2006 cfiscsi_target_release(ct); 2007 ctl_free_opts(&opts); 2008 return; 2009 } 2010 port = &ct->ct_port; 2011 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2012 goto done; 2013 2014 port->frontend = &cfiscsi_frontend; 2015 port->port_type = CTL_PORT_ISCSI; 2016 /* XXX KDM what should the real number be here? */ 2017 port->num_requested_ctl_io = 4096; 2018 port->port_name = "iscsi"; 2019 port->physical_port = strtoul(tag, NULL, 0); 2020 port->virtual_port = ct->ct_target_id; 2021 port->port_online = cfiscsi_online; 2022 port->port_offline = cfiscsi_offline; 2023 port->port_info = cfiscsi_info; 2024 port->onoff_arg = ct; 2025 port->lun_enable = cfiscsi_lun_enable; 2026 port->lun_disable = cfiscsi_lun_disable; 2027 port->lun_map = cfiscsi_lun_map; 2028 port->targ_lun_arg = ct; 2029 port->fe_datamove = cfiscsi_datamove; 2030 port->fe_done = cfiscsi_done; 2031 2032 /* XXX KDM what should we report here? */ 2033 /* XXX These should probably be fetched from CTL. */ 2034 port->max_targets = 1; 2035 port->max_target_id = 15; 2036 2037 port->options = opts; 2038 STAILQ_INIT(&opts); 2039 2040 /* Generate Port ID. */ 2041 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2042 idlen = roundup2(idlen, 4); 2043 len = sizeof(struct scsi_vpd_device_id) + idlen; 2044 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2045 M_CTL, M_WAITOK | M_ZERO); 2046 port->port_devid->len = len; 2047 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2048 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2049 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2050 SVPD_ID_TYPE_SCSI_NAME; 2051 desc->length = idlen; 2052 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2053 target, port->physical_port); 2054 2055 /* Generate Target ID. */ 2056 idlen = strlen(target) + 1; 2057 idlen = roundup2(idlen, 4); 2058 len = sizeof(struct scsi_vpd_device_id) + idlen; 2059 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2060 M_CTL, M_WAITOK | M_ZERO); 2061 port->target_devid->len = len; 2062 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2063 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2064 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2065 SVPD_ID_TYPE_SCSI_NAME; 2066 desc->length = idlen; 2067 strlcpy(desc->identifier, target, idlen); 2068 2069 retval = ctl_port_register(port); 2070 if (retval != 0) { 2071 ctl_free_opts(&port->options); 2072 cfiscsi_target_release(ct); 2073 free(port->port_devid, M_CFISCSI); 2074 free(port->target_devid, M_CFISCSI); 2075 req->status = CTL_LUN_ERROR; 2076 snprintf(req->error_str, sizeof(req->error_str), 2077 "ctl_frontend_register() failed with error %d", retval); 2078 return; 2079 } 2080done: 2081 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2082 req->status = CTL_LUN_OK; 2083 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2084 sizeof(port->targ_port)); //XXX 2085} 2086 2087static void 2088cfiscsi_ioctl_port_remove(struct ctl_req *req) 2089{ 2090 struct cfiscsi_target *ct; 2091 const char *target; 2092 ctl_options_t opts; 2093 2094 ctl_init_opts(&opts, req->num_args, req->kern_args); 2095 target = ctl_get_opt(&opts, "cfiscsi_target"); 2096 if (target == NULL) { 2097 ctl_free_opts(&opts); 2098 req->status = CTL_LUN_ERROR; 2099 snprintf(req->error_str, sizeof(req->error_str), 2100 "Missing required argument"); 2101 return; 2102 } 2103 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2104 if (ct == NULL) { 2105 ctl_free_opts(&opts); 2106 req->status = CTL_LUN_ERROR; 2107 snprintf(req->error_str, sizeof(req->error_str), 2108 "can't find target \"%s\"", target); 2109 return; 2110 } 2111 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2112 ctl_free_opts(&opts); 2113 req->status = CTL_LUN_ERROR; 2114 snprintf(req->error_str, sizeof(req->error_str), 2115 "target \"%s\" is already dying", target); 2116 return; 2117 } 2118 ctl_free_opts(&opts); 2119 2120 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2121 ctl_port_offline(&ct->ct_port); 2122 cfiscsi_target_release(ct); 2123 cfiscsi_target_release(ct); 2124} 2125 2126static int 2127cfiscsi_ioctl(struct cdev *dev, 2128 u_long cmd, caddr_t addr, int flag, struct thread *td) 2129{ 2130 struct ctl_iscsi *ci; 2131 struct ctl_req *req; 2132 2133 if (cmd == CTL_PORT_REQ) { 2134 req = (struct ctl_req *)addr; 2135 switch (req->reqtype) { 2136 case CTL_REQ_CREATE: 2137 cfiscsi_ioctl_port_create(req); 2138 break; 2139 case CTL_REQ_REMOVE: 2140 cfiscsi_ioctl_port_remove(req); 2141 break; 2142 default: 2143 req->status = CTL_LUN_ERROR; 2144 snprintf(req->error_str, sizeof(req->error_str), 2145 "Unsupported request type %d", req->reqtype); 2146 } 2147 return (0); 2148 } 2149 2150 if (cmd != CTL_ISCSI) 2151 return (ENOTTY); 2152 2153 ci = (struct ctl_iscsi *)addr; 2154 switch (ci->type) { 2155 case CTL_ISCSI_HANDOFF: 2156 cfiscsi_ioctl_handoff(ci); 2157 break; 2158 case CTL_ISCSI_LIST: 2159 cfiscsi_ioctl_list(ci); 2160 break; 2161 case CTL_ISCSI_TERMINATE: 2162 cfiscsi_ioctl_terminate(ci); 2163 break; 2164 case CTL_ISCSI_LOGOUT: 2165 cfiscsi_ioctl_logout(ci); 2166 break; 2167#ifdef ICL_KERNEL_PROXY 2168 case CTL_ISCSI_LISTEN: 2169 cfiscsi_ioctl_listen(ci); 2170 break; 2171 case CTL_ISCSI_ACCEPT: 2172 cfiscsi_ioctl_accept(ci); 2173 break; 2174 case CTL_ISCSI_SEND: 2175 cfiscsi_ioctl_send(ci); 2176 break; 2177 case CTL_ISCSI_RECEIVE: 2178 cfiscsi_ioctl_receive(ci); 2179 break; 2180#else 2181 case CTL_ISCSI_LISTEN: 2182 case CTL_ISCSI_ACCEPT: 2183 case CTL_ISCSI_SEND: 2184 case CTL_ISCSI_RECEIVE: 2185 ci->status = CTL_ISCSI_ERROR; 2186 snprintf(ci->error_str, sizeof(ci->error_str), 2187 "%s: CTL compiled without ICL_KERNEL_PROXY", 2188 __func__); 2189 break; 2190#endif /* !ICL_KERNEL_PROXY */ 2191 default: 2192 ci->status = CTL_ISCSI_ERROR; 2193 snprintf(ci->error_str, sizeof(ci->error_str), 2194 "%s: invalid iSCSI request type %d", __func__, ci->type); 2195 break; 2196 } 2197 2198 return (0); 2199} 2200 2201static void 2202cfiscsi_target_hold(struct cfiscsi_target *ct) 2203{ 2204 2205 refcount_acquire(&ct->ct_refcount); 2206} 2207 2208static void 2209cfiscsi_target_release(struct cfiscsi_target *ct) 2210{ 2211 struct cfiscsi_softc *softc; 2212 2213 softc = ct->ct_softc; 2214 mtx_lock(&softc->lock); 2215 if (refcount_release(&ct->ct_refcount)) { 2216 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2217 mtx_unlock(&softc->lock); 2218 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2219 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2220 if (ctl_port_deregister(&ct->ct_port) != 0) 2221 printf("%s: ctl_port_deregister() failed\n", 2222 __func__); 2223 } 2224 free(ct, M_CFISCSI); 2225 2226 return; 2227 } 2228 mtx_unlock(&softc->lock); 2229} 2230 2231static struct cfiscsi_target * 2232cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2233{ 2234 struct cfiscsi_target *ct; 2235 2236 mtx_lock(&softc->lock); 2237 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2238 if (strcmp(name, ct->ct_name) != 0 || 2239 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2240 continue; 2241 cfiscsi_target_hold(ct); 2242 mtx_unlock(&softc->lock); 2243 return (ct); 2244 } 2245 mtx_unlock(&softc->lock); 2246 2247 return (NULL); 2248} 2249 2250static struct cfiscsi_target * 2251cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2252 const char *alias) 2253{ 2254 struct cfiscsi_target *ct, *newct; 2255 int i; 2256 2257 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2258 return (NULL); 2259 2260 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2261 2262 mtx_lock(&softc->lock); 2263 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2264 if (strcmp(name, ct->ct_name) != 0 || 2265 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2266 continue; 2267 cfiscsi_target_hold(ct); 2268 mtx_unlock(&softc->lock); 2269 free(newct, M_CFISCSI); 2270 return (ct); 2271 } 2272 2273 for (i = 0; i < CTL_MAX_LUNS; i++) 2274 newct->ct_luns[i] = UINT32_MAX; 2275 2276 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2277 if (alias != NULL) 2278 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2279 refcount_init(&newct->ct_refcount, 1); 2280 newct->ct_softc = softc; 2281 if (TAILQ_EMPTY(&softc->targets)) 2282 softc->last_target_id = 0; 2283 newct->ct_target_id = ++softc->last_target_id; 2284 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2285 mtx_unlock(&softc->lock); 2286 2287 return (newct); 2288} 2289 2290/* 2291 * Takes LUN from the target space and returns LUN from the CTL space. 2292 */ 2293static uint32_t 2294cfiscsi_lun_map(void *arg, uint32_t lun) 2295{ 2296 struct cfiscsi_target *ct = arg; 2297 2298 if (lun >= CTL_MAX_LUNS) { 2299 CFISCSI_DEBUG("requested lun number %d is higher " 2300 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2301 return (UINT32_MAX); 2302 } 2303 return (ct->ct_luns[lun]); 2304} 2305 2306static int 2307cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2308 unsigned long lun_id, unsigned long ctl_lun_id) 2309{ 2310 2311 if (lun_id >= CTL_MAX_LUNS) { 2312 CFISCSI_WARN("requested lun number %ld is higher " 2313 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2314 return (-1); 2315 } 2316 2317 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2318 /* 2319 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2320 * when the LUN is created, and a second time just before 2321 * the port is brought online; don't emit warnings 2322 * for that case. 2323 */ 2324 if (ct->ct_luns[lun_id] == ctl_lun_id) 2325 return (0); 2326 CFISCSI_WARN("lun %ld already allocated", lun_id); 2327 return (-1); 2328 } 2329 2330#if 0 2331 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2332 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2333#endif 2334 2335 ct->ct_luns[lun_id] = ctl_lun_id; 2336 2337 return (0); 2338} 2339 2340static int 2341cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2342{ 2343 struct cfiscsi_softc *softc; 2344 struct cfiscsi_target *ct; 2345 const char *target = NULL; 2346 const char *lun = NULL; 2347 unsigned long tmp; 2348 2349 ct = (struct cfiscsi_target *)arg; 2350 softc = ct->ct_softc; 2351 2352 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2353 "cfiscsi_target"); 2354 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2355 "cfiscsi_lun"); 2356 2357 if (target == NULL && lun == NULL) 2358 return (0); 2359 2360 if (target == NULL || lun == NULL) { 2361 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2362 "cfiscsi_lun, or the other way around; ignoring"); 2363 return (0); 2364 } 2365 2366 if (strcmp(target, ct->ct_name) != 0) 2367 return (0); 2368 2369 tmp = strtoul(lun, NULL, 10); 2370 cfiscsi_target_set_lun(ct, tmp, lun_id); 2371 return (0); 2372} 2373 2374static int 2375cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2376{ 2377 struct cfiscsi_softc *softc; 2378 struct cfiscsi_target *ct; 2379 int i; 2380 2381 ct = (struct cfiscsi_target *)arg; 2382 softc = ct->ct_softc; 2383 2384 mtx_lock(&softc->lock); 2385 for (i = 0; i < CTL_MAX_LUNS; i++) { 2386 if (ct->ct_luns[i] != lun_id) 2387 continue; 2388 ct->ct_luns[i] = UINT32_MAX; 2389 break; 2390 } 2391 mtx_unlock(&softc->lock); 2392 return (0); 2393} 2394 2395static void 2396cfiscsi_datamove_in(union ctl_io *io) 2397{ 2398 struct cfiscsi_session *cs; 2399 struct icl_pdu *request, *response; 2400 const struct iscsi_bhs_scsi_command *bhssc; 2401 struct iscsi_bhs_data_in *bhsdi; 2402 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2403 size_t len, expected_len, sg_len, buffer_offset; 2404 const char *sg_addr; 2405 int ctl_sg_count, error, i; 2406 2407 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2408 cs = PDU_SESSION(request); 2409 2410 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2411 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2412 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2413 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2414 2415 if (io->scsiio.kern_sg_entries > 0) { 2416 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2417 ctl_sg_count = io->scsiio.kern_sg_entries; 2418 } else { 2419 ctl_sglist = &ctl_sg_entry; 2420 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2421 ctl_sglist->len = io->scsiio.kern_data_len; 2422 ctl_sg_count = 1; 2423 } 2424 2425 /* 2426 * This is the total amount of data to be transferred within the current 2427 * SCSI command. We need to record it so that we can properly report 2428 * underflow/underflow. 2429 */ 2430 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2431 2432 /* 2433 * This is the offset within the current SCSI command; for the first 2434 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2435 * it will be the sum of lengths of previous ones. 2436 */ 2437 buffer_offset = io->scsiio.kern_rel_offset; 2438 2439 /* 2440 * This is the transfer length expected by the initiator. In theory, 2441 * it could be different from the correct amount of data from the SCSI 2442 * point of view, even if that doesn't make any sense. 2443 */ 2444 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2445#if 0 2446 if (expected_len != io->scsiio.kern_total_len) { 2447 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2448 "actual length %zd", expected_len, 2449 (size_t)io->scsiio.kern_total_len); 2450 } 2451#endif 2452 2453 if (buffer_offset >= expected_len) { 2454#if 0 2455 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2456 "already sent the expected len", buffer_offset); 2457#endif 2458 io->scsiio.be_move_done(io); 2459 return; 2460 } 2461 2462 i = 0; 2463 sg_addr = NULL; 2464 sg_len = 0; 2465 response = NULL; 2466 bhsdi = NULL; 2467 for (;;) { 2468 if (response == NULL) { 2469 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2470 if (response == NULL) { 2471 CFISCSI_SESSION_WARN(cs, "failed to " 2472 "allocate memory; dropping connection"); 2473 ctl_set_busy(&io->scsiio); 2474 io->scsiio.be_move_done(io); 2475 cfiscsi_session_terminate(cs); 2476 return; 2477 } 2478 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2479 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2480 bhsdi->bhsdi_initiator_task_tag = 2481 bhssc->bhssc_initiator_task_tag; 2482 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2483 PDU_EXPDATASN(request)++; 2484 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2485 } 2486 2487 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2488 if (sg_len == 0) { 2489 sg_addr = ctl_sglist[i].addr; 2490 sg_len = ctl_sglist[i].len; 2491 KASSERT(sg_len > 0, ("sg_len <= 0")); 2492 } 2493 2494 len = sg_len; 2495 2496 /* 2497 * Truncate to maximum data segment length. 2498 */ 2499 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2500 ("ip_data_len %zd >= max_data_segment_length %zd", 2501 response->ip_data_len, cs->cs_max_data_segment_length)); 2502 if (response->ip_data_len + len > 2503 cs->cs_max_data_segment_length) { 2504 len = cs->cs_max_data_segment_length - 2505 response->ip_data_len; 2506 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2507 len, sg_len)); 2508 } 2509 2510 /* 2511 * Truncate to expected data transfer length. 2512 */ 2513 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2514 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2515 buffer_offset, response->ip_data_len, expected_len)); 2516 if (buffer_offset + response->ip_data_len + len > expected_len) { 2517 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2518 "to expected data transfer length %zd", 2519 buffer_offset + response->ip_data_len + len, expected_len); 2520 len = expected_len - (buffer_offset + response->ip_data_len); 2521 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2522 len, sg_len)); 2523 } 2524 2525 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2526 if (error != 0) { 2527 CFISCSI_SESSION_WARN(cs, "failed to " 2528 "allocate memory; dropping connection"); 2529 icl_pdu_free(response); 2530 ctl_set_busy(&io->scsiio); 2531 io->scsiio.be_move_done(io); 2532 cfiscsi_session_terminate(cs); 2533 return; 2534 } 2535 sg_addr += len; 2536 sg_len -= len; 2537 2538 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2539 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2540 buffer_offset, response->ip_data_len, expected_len)); 2541 if (buffer_offset + response->ip_data_len == expected_len) { 2542 /* 2543 * Already have the amount of data the initiator wanted. 2544 */ 2545 break; 2546 } 2547 2548 if (sg_len == 0) { 2549 /* 2550 * End of scatter-gather segment; 2551 * proceed to the next one... 2552 */ 2553 if (i == ctl_sg_count - 1) { 2554 /* 2555 * ... unless this was the last one. 2556 */ 2557 break; 2558 } 2559 i++; 2560 } 2561 2562 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2563 /* 2564 * Can't stuff more data into the current PDU; 2565 * queue it. Note that's not enough to check 2566 * for kern_data_resid == 0 instead; there 2567 * may be several Data-In PDUs for the final 2568 * call to cfiscsi_datamove(), and we want 2569 * to set the F flag only on the last of them. 2570 */ 2571 buffer_offset += response->ip_data_len; 2572 if (buffer_offset == io->scsiio.kern_total_len || 2573 buffer_offset == expected_len) 2574 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2575 cfiscsi_pdu_queue(response); 2576 response = NULL; 2577 bhsdi = NULL; 2578 } 2579 } 2580 if (response != NULL) { 2581 buffer_offset += response->ip_data_len; 2582 if (buffer_offset == io->scsiio.kern_total_len || 2583 buffer_offset == expected_len) 2584 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2585 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2586 cfiscsi_pdu_queue(response); 2587 } 2588 2589 io->scsiio.be_move_done(io); 2590} 2591 2592static void 2593cfiscsi_datamove_out(union ctl_io *io) 2594{ 2595 struct cfiscsi_session *cs; 2596 struct icl_pdu *request, *response; 2597 const struct iscsi_bhs_scsi_command *bhssc; 2598 struct iscsi_bhs_r2t *bhsr2t; 2599 struct cfiscsi_data_wait *cdw; 2600 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2601 uint32_t expected_len, r2t_off, r2t_len; 2602 uint32_t target_transfer_tag; 2603 bool done; 2604 2605 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2606 cs = PDU_SESSION(request); 2607 2608 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2609 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2610 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2611 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2612 2613 /* 2614 * We need to record it so that we can properly report 2615 * underflow/underflow. 2616 */ 2617 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2618 2619 /* 2620 * Report write underflow as error since CTL and backends don't 2621 * really support it, and SCSI does not tell how to do it right. 2622 */ 2623 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2624 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2625 expected_len) { 2626 io->scsiio.io_hdr.port_status = 43; 2627 io->scsiio.be_move_done(io); 2628 return; 2629 } 2630 2631 target_transfer_tag = 2632 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2633 2634#if 0 2635 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2636 "task tag 0x%x, target transfer tag 0x%x", 2637 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2638#endif 2639 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2640 if (cdw == NULL) { 2641 CFISCSI_SESSION_WARN(cs, "failed to " 2642 "allocate memory; dropping connection"); 2643 ctl_set_busy(&io->scsiio); 2644 io->scsiio.be_move_done(io); 2645 cfiscsi_session_terminate(cs); 2646 return; 2647 } 2648 cdw->cdw_ctl_io = io; 2649 cdw->cdw_target_transfer_tag = target_transfer_tag; 2650 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2651 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2652 2653 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2654 if (io->scsiio.kern_sg_entries > 0) { 2655 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2656 } else { 2657 ctl_sglist = &ctl_sg_entry; 2658 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2659 ctl_sglist->len = io->scsiio.kern_data_len; 2660 } 2661 cdw->cdw_sg_index = 0; 2662 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2663 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2664 r2t_off = io->scsiio.ext_data_filled; 2665 while (r2t_off > 0) { 2666 if (r2t_off >= cdw->cdw_sg_len) { 2667 r2t_off -= cdw->cdw_sg_len; 2668 cdw->cdw_sg_index++; 2669 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2670 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2671 continue; 2672 } 2673 cdw->cdw_sg_addr += r2t_off; 2674 cdw->cdw_sg_len -= r2t_off; 2675 r2t_off = 0; 2676 } 2677 2678 if (cs->cs_immediate_data && 2679 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2680 icl_pdu_data_segment_length(request)) { 2681 done = cfiscsi_handle_data_segment(request, cdw); 2682 if (done) { 2683 uma_zfree(cfiscsi_data_wait_zone, cdw); 2684 io->scsiio.be_move_done(io); 2685 return; 2686 } 2687 } 2688 2689 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2690 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2691 cs->cs_max_burst_length); 2692 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2693 2694 CFISCSI_SESSION_LOCK(cs); 2695 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2696 CFISCSI_SESSION_UNLOCK(cs); 2697 2698 /* 2699 * XXX: We should limit the number of outstanding R2T PDUs 2700 * per task to MaxOutstandingR2T. 2701 */ 2702 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2703 if (response == NULL) { 2704 CFISCSI_SESSION_WARN(cs, "failed to " 2705 "allocate memory; dropping connection"); 2706 ctl_set_busy(&io->scsiio); 2707 io->scsiio.be_move_done(io); 2708 cfiscsi_session_terminate(cs); 2709 return; 2710 } 2711 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2712 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2713 bhsr2t->bhsr2t_flags = 0x80; 2714 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2715 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2716 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2717 /* 2718 * XXX: Here we assume that cfiscsi_datamove() won't ever 2719 * be running concurrently on several CPUs for a given 2720 * command. 2721 */ 2722 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2723 PDU_R2TSN(request)++; 2724 /* 2725 * This is the offset within the current SCSI command; 2726 * i.e. for the first call of datamove(), it will be 0, 2727 * and for subsequent ones it will be the sum of lengths 2728 * of previous ones. 2729 * 2730 * The ext_data_filled is to account for unsolicited 2731 * (immediate) data that might have already arrived. 2732 */ 2733 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2734 /* 2735 * This is the total length (sum of S/G lengths) this call 2736 * to cfiscsi_datamove() is supposed to handle, limited by 2737 * MaxBurstLength. 2738 */ 2739 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2740 cfiscsi_pdu_queue(response); 2741} 2742 2743static void 2744cfiscsi_datamove(union ctl_io *io) 2745{ 2746 2747 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2748 cfiscsi_datamove_in(io); 2749 else { 2750 /* We hadn't received anything during this datamove yet. */ 2751 io->scsiio.ext_data_filled = 0; 2752 cfiscsi_datamove_out(io); 2753 } 2754} 2755 2756static void 2757cfiscsi_scsi_command_done(union ctl_io *io) 2758{ 2759 struct icl_pdu *request, *response; 2760 struct iscsi_bhs_scsi_command *bhssc; 2761 struct iscsi_bhs_scsi_response *bhssr; 2762#ifdef DIAGNOSTIC 2763 struct cfiscsi_data_wait *cdw; 2764#endif 2765 struct cfiscsi_session *cs; 2766 uint16_t sense_length; 2767 2768 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2769 cs = PDU_SESSION(request); 2770 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2771 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2772 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2773 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2774 2775 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2776 // bhssc->bhssc_initiator_task_tag); 2777 2778#ifdef DIAGNOSTIC 2779 CFISCSI_SESSION_LOCK(cs); 2780 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2781 KASSERT(bhssc->bhssc_initiator_task_tag != 2782 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2783 CFISCSI_SESSION_UNLOCK(cs); 2784#endif 2785 2786 /* 2787 * Do not return status for aborted commands. 2788 * There are exceptions, but none supported by CTL yet. 2789 */ 2790 if ((io->io_hdr.flags & CTL_FLAG_ABORT) && 2791 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) { 2792 ctl_free_io(io); 2793 icl_pdu_free(request); 2794 return; 2795 } 2796 2797 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2798 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2799 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2800 bhssr->bhssr_flags = 0x80; 2801 /* 2802 * XXX: We don't deal with bidirectional under/overflows; 2803 * does anything actually support those? 2804 */ 2805 if (PDU_TOTAL_TRANSFER_LEN(request) < 2806 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2807 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2808 bhssr->bhssr_residual_count = 2809 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2810 PDU_TOTAL_TRANSFER_LEN(request)); 2811 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2812 // ntohl(bhssr->bhssr_residual_count)); 2813 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2814 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2815 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2816 bhssr->bhssr_residual_count = 2817 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2818 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2819 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2820 // ntohl(bhssr->bhssr_residual_count)); 2821 } 2822 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2823 bhssr->bhssr_status = io->scsiio.scsi_status; 2824 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2825 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2826 2827 if (io->scsiio.sense_len > 0) { 2828#if 0 2829 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2830 io->scsiio.sense_len); 2831#endif 2832 sense_length = htons(io->scsiio.sense_len); 2833 icl_pdu_append_data(response, 2834 &sense_length, sizeof(sense_length), M_WAITOK); 2835 icl_pdu_append_data(response, 2836 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2837 } 2838 2839 ctl_free_io(io); 2840 icl_pdu_free(request); 2841 cfiscsi_pdu_queue(response); 2842} 2843 2844static void 2845cfiscsi_task_management_done(union ctl_io *io) 2846{ 2847 struct icl_pdu *request, *response; 2848 struct iscsi_bhs_task_management_request *bhstmr; 2849 struct iscsi_bhs_task_management_response *bhstmr2; 2850 struct cfiscsi_data_wait *cdw, *tmpcdw; 2851 struct cfiscsi_session *cs; 2852 2853 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2854 cs = PDU_SESSION(request); 2855 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2856 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2857 ISCSI_BHS_OPCODE_TASK_REQUEST, 2858 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2859 2860#if 0 2861 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2862 bhstmr->bhstmr_initiator_task_tag, 2863 bhstmr->bhstmr_referenced_task_tag); 2864#endif 2865 2866 if ((bhstmr->bhstmr_function & ~0x80) == 2867 BHSTMR_FUNCTION_ABORT_TASK) { 2868 /* 2869 * Make sure we no longer wait for Data-Out for this command. 2870 */ 2871 CFISCSI_SESSION_LOCK(cs); 2872 TAILQ_FOREACH_SAFE(cdw, 2873 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2874 if (bhstmr->bhstmr_referenced_task_tag != 2875 cdw->cdw_initiator_task_tag) 2876 continue; 2877 2878#if 0 2879 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2880 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2881#endif 2882 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2883 cdw, cdw_next); 2884 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2885 uma_zfree(cfiscsi_data_wait_zone, cdw); 2886 } 2887 CFISCSI_SESSION_UNLOCK(cs); 2888 } 2889 2890 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2891 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2892 response->ip_bhs; 2893 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2894 bhstmr2->bhstmr_flags = 0x80; 2895 if (io->io_hdr.status == CTL_SUCCESS) { 2896 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2897 } else { 2898 /* 2899 * XXX: How to figure out what exactly went wrong? iSCSI spec 2900 * expects us to provide detailed error, e.g. "Task does 2901 * not exist" or "LUN does not exist". 2902 */ 2903 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2904 bhstmr2->bhstmr_response = 2905 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2906 } 2907 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2908 2909 ctl_free_io(io); 2910 icl_pdu_free(request); 2911 cfiscsi_pdu_queue(response); 2912} 2913 2914static void 2915cfiscsi_done(union ctl_io *io) 2916{ 2917 struct icl_pdu *request; 2918 struct cfiscsi_session *cs; 2919 2920 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2921 ("invalid CTL status %#x", io->io_hdr.status)); 2922 2923 if (io->io_hdr.io_type == CTL_IO_TASK && 2924 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2925 /* 2926 * Implicit task termination has just completed; nothing to do. 2927 */ 2928 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2929 cs->cs_tasks_aborted = true; 2930 refcount_release(&cs->cs_outstanding_ctl_pdus); 2931 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2932 ctl_free_io(io); 2933 return; 2934 } 2935 2936 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2937 cs = PDU_SESSION(request); 2938 refcount_release(&cs->cs_outstanding_ctl_pdus); 2939 2940 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2941 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2942 cfiscsi_scsi_command_done(io); 2943 break; 2944 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2945 cfiscsi_task_management_done(io); 2946 break; 2947 default: 2948 panic("cfiscsi_done called with wrong opcode 0x%x", 2949 request->ip_bhs->bhs_opcode); 2950 } 2951} 2952