ctl_frontend_iscsi.c revision 284640
1/*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 284640 2015-06-20 12:43:54Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 284640 2015-06-20 12:43:54Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capsicum.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include <dev/iscsi/icl.h> 71#include <dev/iscsi/icl_wrappers.h> 72#include <dev/iscsi/iscsi_proto.h> 73#include <cam/ctl/ctl_frontend_iscsi.h> 74 75#ifdef ICL_KERNEL_PROXY 76#include <sys/socketvar.h> 77#endif 78 79#ifdef ICL_KERNEL_PROXY 80FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 81#endif 82 83static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 84static uma_zone_t cfiscsi_data_wait_zone; 85 86SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 87 "CAM Target Layer iSCSI Frontend"); 88static int debug = 1; 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 93 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 94static int login_timeout = 60; 95SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 96 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 97static int maxcmdsn_delta = 256; 98SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 99 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 100 "without confirmation"); 101 102#define CFISCSI_DEBUG(X, ...) \ 103 do { \ 104 if (debug > 1) { \ 105 printf("%s: " X "\n", \ 106 __func__, ## __VA_ARGS__); \ 107 } \ 108 } while (0) 109 110#define CFISCSI_WARN(X, ...) \ 111 do { \ 112 if (debug > 0) { \ 113 printf("WARNING: %s: " X "\n", \ 114 __func__, ## __VA_ARGS__); \ 115 } \ 116 } while (0) 117 118#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 119 do { \ 120 if (debug > 1) { \ 121 printf("%s: %s (%s): " X "\n", \ 122 __func__, S->cs_initiator_addr, \ 123 S->cs_initiator_name, ## __VA_ARGS__); \ 124 } \ 125 } while (0) 126 127#define CFISCSI_SESSION_WARN(S, X, ...) \ 128 do { \ 129 if (debug > 0) { \ 130 printf("WARNING: %s (%s): " X "\n", \ 131 S->cs_initiator_addr, \ 132 S->cs_initiator_name, ## __VA_ARGS__); \ 133 } \ 134 } while (0) 135 136#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 137#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 138#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 139 140#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 141#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 142#define PDU_EXPDATASN(X) (X)->ip_prv0 143#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 144#define PDU_R2TSN(X) (X)->ip_prv2 145 146int cfiscsi_init(void); 147static void cfiscsi_online(void *arg); 148static void cfiscsi_offline(void *arg); 149static int cfiscsi_info(void *arg, struct sbuf *sb); 150static int cfiscsi_lun_enable(void *arg, int lun_id); 151static int cfiscsi_lun_disable(void *arg, int lun_id); 152static int cfiscsi_ioctl(struct cdev *dev, 153 u_long cmd, caddr_t addr, int flag, struct thread *td); 154static void cfiscsi_datamove(union ctl_io *io); 155static void cfiscsi_datamove_in(union ctl_io *io); 156static void cfiscsi_datamove_out(union ctl_io *io); 157static void cfiscsi_done(union ctl_io *io); 158static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 159static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 160static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 161static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 162static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 163static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 164static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 165static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 166 struct cfiscsi_session *cs, union ctl_io *io, 167 uint32_t initiator_task_tag, 168 uint32_t *target_transfer_tagp); 169static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 170 struct cfiscsi_data_wait *cdw); 171static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 172 *softc, const char *name, uint16_t tag); 173static struct cfiscsi_target *cfiscsi_target_find_or_create( 174 struct cfiscsi_softc *softc, const char *name, const char *alias, 175 uint16_t tag); 176static void cfiscsi_target_release(struct cfiscsi_target *ct); 177static void cfiscsi_session_delete(struct cfiscsi_session *cs); 178 179static struct cfiscsi_softc cfiscsi_softc; 180extern struct ctl_softc *control_softc; 181 182static struct ctl_frontend cfiscsi_frontend = 183{ 184 .name = "iscsi", 185 .init = cfiscsi_init, 186 .ioctl = cfiscsi_ioctl, 187}; 188CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 189MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 190 191static struct icl_pdu * 192cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 193{ 194 195 return (icl_pdu_new(request->ip_conn, flags)); 196} 197 198static bool 199cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 200{ 201 const struct iscsi_bhs_scsi_command *bhssc; 202 struct cfiscsi_session *cs; 203 uint32_t cmdsn, expstatsn; 204 205 cs = PDU_SESSION(request); 206 207 /* 208 * Every incoming PDU - not just NOP-Out - resets the ping timer. 209 * The purpose of the timeout is to reset the connection when it stalls; 210 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 211 * in some queue. 212 * 213 * XXX: Locking? 214 */ 215 cs->cs_timeout = 0; 216 217 /* 218 * Data-Out PDUs don't contain CmdSN. 219 */ 220 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 221 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 222 return (false); 223 224 /* 225 * We're only using fields common for all the request 226 * (initiator -> target) PDUs. 227 */ 228 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 229 cmdsn = ntohl(bhssc->bhssc_cmdsn); 230 expstatsn = ntohl(bhssc->bhssc_expstatsn); 231 232 CFISCSI_SESSION_LOCK(cs); 233#if 0 234 if (expstatsn != cs->cs_statsn) { 235 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 236 "while current StatSN is %d", expstatsn, 237 cs->cs_statsn); 238 } 239#endif 240 241 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 242 /* 243 * The target MUST silently ignore any non-immediate command 244 * outside of this range. 245 */ 246 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 247 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 248 CFISCSI_SESSION_UNLOCK(cs); 249 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 250 "while expected %u", cmdsn, cs->cs_cmdsn); 251 return (true); 252 } 253 254 /* 255 * We don't support multiple connections now, so any 256 * discontinuity in CmdSN means lost PDUs. Since we don't 257 * support PDU retransmission -- terminate the connection. 258 */ 259 if (cmdsn != cs->cs_cmdsn) { 260 CFISCSI_SESSION_UNLOCK(cs); 261 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 262 "while expected %u; dropping connection", 263 cmdsn, cs->cs_cmdsn); 264 cfiscsi_session_terminate(cs); 265 return (true); 266 } 267 cs->cs_cmdsn++; 268 } 269 270 CFISCSI_SESSION_UNLOCK(cs); 271 272 return (false); 273} 274 275static void 276cfiscsi_pdu_handle(struct icl_pdu *request) 277{ 278 struct cfiscsi_session *cs; 279 bool ignore; 280 281 cs = PDU_SESSION(request); 282 283 ignore = cfiscsi_pdu_update_cmdsn(request); 284 if (ignore) { 285 icl_pdu_free(request); 286 return; 287 } 288 289 /* 290 * Handle the PDU; this includes e.g. receiving the remaining 291 * part of PDU and submitting the SCSI command to CTL 292 * or queueing a reply. The handling routine is responsible 293 * for freeing the PDU when it's no longer needed. 294 */ 295 switch (request->ip_bhs->bhs_opcode & 296 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 297 case ISCSI_BHS_OPCODE_NOP_OUT: 298 cfiscsi_pdu_handle_nop_out(request); 299 break; 300 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 301 cfiscsi_pdu_handle_scsi_command(request); 302 break; 303 case ISCSI_BHS_OPCODE_TASK_REQUEST: 304 cfiscsi_pdu_handle_task_request(request); 305 break; 306 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 307 cfiscsi_pdu_handle_data_out(request); 308 break; 309 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 310 cfiscsi_pdu_handle_logout_request(request); 311 break; 312 default: 313 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 314 "opcode 0x%x; dropping connection", 315 request->ip_bhs->bhs_opcode); 316 icl_pdu_free(request); 317 cfiscsi_session_terminate(cs); 318 } 319 320} 321 322static void 323cfiscsi_receive_callback(struct icl_pdu *request) 324{ 325 struct cfiscsi_session *cs; 326 327 cs = PDU_SESSION(request); 328 329#ifdef ICL_KERNEL_PROXY 330 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 331 if (cs->cs_login_pdu == NULL) 332 cs->cs_login_pdu = request; 333 else 334 icl_pdu_free(request); 335 cv_signal(&cs->cs_login_cv); 336 return; 337 } 338#endif 339 340 cfiscsi_pdu_handle(request); 341} 342 343static void 344cfiscsi_error_callback(struct icl_conn *ic) 345{ 346 struct cfiscsi_session *cs; 347 348 cs = CONN_SESSION(ic); 349 350 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 351 cfiscsi_session_terminate(cs); 352} 353 354static int 355cfiscsi_pdu_prepare(struct icl_pdu *response) 356{ 357 struct cfiscsi_session *cs; 358 struct iscsi_bhs_scsi_response *bhssr; 359 bool advance_statsn = true; 360 361 cs = PDU_SESSION(response); 362 363 CFISCSI_SESSION_LOCK_ASSERT(cs); 364 365 /* 366 * We're only using fields common for all the response 367 * (target -> initiator) PDUs. 368 */ 369 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 370 371 /* 372 * 10.8.3: "The StatSN for this connection is not advanced 373 * after this PDU is sent." 374 */ 375 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 376 advance_statsn = false; 377 378 /* 379 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 380 * StatSN for the connection is not advanced after this PDU is sent." 381 */ 382 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 383 bhssr->bhssr_initiator_task_tag == 0xffffffff) 384 advance_statsn = false; 385 386 /* 387 * See the comment below - StatSN is not meaningful and must 388 * not be advanced. 389 */ 390 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 391 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 392 advance_statsn = false; 393 394 /* 395 * 10.7.3: "The fields StatSN, Status, and Residual Count 396 * only have meaningful content if the S bit is set to 1." 397 */ 398 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 399 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 400 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 401 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 402 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 403 404 if (advance_statsn) 405 cs->cs_statsn++; 406 407 return (0); 408} 409 410static void 411cfiscsi_pdu_queue(struct icl_pdu *response) 412{ 413 struct cfiscsi_session *cs; 414 415 cs = PDU_SESSION(response); 416 417 CFISCSI_SESSION_LOCK(cs); 418 cfiscsi_pdu_prepare(response); 419 icl_pdu_queue(response); 420 CFISCSI_SESSION_UNLOCK(cs); 421} 422 423static uint32_t 424cfiscsi_decode_lun(uint64_t encoded) 425{ 426 uint8_t lun[8]; 427 uint32_t result; 428 429 /* 430 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 431 * but is in fact an evil, multidimensional structure defined 432 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 433 */ 434 memcpy(lun, &encoded, sizeof(lun)); 435 switch (lun[0] & 0xC0) { 436 case 0x00: 437 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 438 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 439 CFISCSI_WARN("malformed LUN " 440 "(peripheral device addressing method): 0x%jx", 441 (uintmax_t)encoded); 442 result = 0xffffffff; 443 break; 444 } 445 result = lun[1]; 446 break; 447 case 0x40: 448 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 449 lun[6] != 0 || lun[7] != 0) { 450 CFISCSI_WARN("malformed LUN " 451 "(flat address space addressing method): 0x%jx", 452 (uintmax_t)encoded); 453 result = 0xffffffff; 454 break; 455 } 456 result = ((lun[0] & 0x3f) << 8) + lun[1]; 457 break; 458 case 0xC0: 459 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 460 lun[6] != 0 || lun[7] != 0) { 461 CFISCSI_WARN("malformed LUN (extended flat " 462 "address space addressing method): 0x%jx", 463 (uintmax_t)encoded); 464 result = 0xffffffff; 465 break; 466 } 467 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 468 default: 469 CFISCSI_WARN("unsupported LUN format 0x%jx", 470 (uintmax_t)encoded); 471 result = 0xffffffff; 472 break; 473 } 474 475 return (result); 476} 477 478static void 479cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 480{ 481 struct cfiscsi_session *cs; 482 struct iscsi_bhs_nop_out *bhsno; 483 struct iscsi_bhs_nop_in *bhsni; 484 struct icl_pdu *response; 485 void *data = NULL; 486 size_t datasize; 487 int error; 488 489 cs = PDU_SESSION(request); 490 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 491 492 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 493 /* 494 * Nothing to do, iscsi_pdu_update_statsn() already 495 * zeroed the timeout. 496 */ 497 icl_pdu_free(request); 498 return; 499 } 500 501 datasize = icl_pdu_data_segment_length(request); 502 if (datasize > 0) { 503 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 504 if (data == NULL) { 505 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 506 "dropping connection"); 507 icl_pdu_free(request); 508 cfiscsi_session_terminate(cs); 509 return; 510 } 511 icl_pdu_get_data(request, 0, data, datasize); 512 } 513 514 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 515 if (response == NULL) { 516 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 517 "droppping connection"); 518 free(data, M_CFISCSI); 519 icl_pdu_free(request); 520 cfiscsi_session_terminate(cs); 521 return; 522 } 523 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 524 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 525 bhsni->bhsni_flags = 0x80; 526 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 527 bhsni->bhsni_target_transfer_tag = 0xffffffff; 528 if (datasize > 0) { 529 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 530 if (error != 0) { 531 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 532 "dropping connection"); 533 free(data, M_CFISCSI); 534 icl_pdu_free(request); 535 icl_pdu_free(response); 536 cfiscsi_session_terminate(cs); 537 return; 538 } 539 free(data, M_CFISCSI); 540 } 541 542 icl_pdu_free(request); 543 cfiscsi_pdu_queue(response); 544} 545 546static void 547cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 548{ 549 struct iscsi_bhs_scsi_command *bhssc; 550 struct cfiscsi_session *cs; 551 union ctl_io *io; 552 int error; 553 554 cs = PDU_SESSION(request); 555 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 556 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 557 // bhssc->bhssc_initiator_task_tag); 558 559 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 560 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 561 "ImmediateData=No; dropping connection"); 562 icl_pdu_free(request); 563 cfiscsi_session_terminate(cs); 564 return; 565 } 566 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 567 ctl_zero_io(io); 568 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 569 io->io_hdr.io_type = CTL_IO_SCSI; 570 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 571 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 572 io->io_hdr.nexus.targ_target.id = 0; 573 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 574 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 575 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 576 case BHSSC_FLAGS_ATTR_UNTAGGED: 577 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 578 break; 579 case BHSSC_FLAGS_ATTR_SIMPLE: 580 io->scsiio.tag_type = CTL_TAG_SIMPLE; 581 break; 582 case BHSSC_FLAGS_ATTR_ORDERED: 583 io->scsiio.tag_type = CTL_TAG_ORDERED; 584 break; 585 case BHSSC_FLAGS_ATTR_HOQ: 586 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 587 break; 588 case BHSSC_FLAGS_ATTR_ACA: 589 io->scsiio.tag_type = CTL_TAG_ACA; 590 break; 591 default: 592 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 593 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 594 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 595 break; 596 } 597 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 598 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 599 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 600 error = ctl_queue(io); 601 if (error != CTL_RETVAL_COMPLETE) { 602 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 603 "dropping connection", error); 604 ctl_free_io(io); 605 refcount_release(&cs->cs_outstanding_ctl_pdus); 606 icl_pdu_free(request); 607 cfiscsi_session_terminate(cs); 608 } 609} 610 611static void 612cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 613{ 614 struct iscsi_bhs_task_management_request *bhstmr; 615 struct iscsi_bhs_task_management_response *bhstmr2; 616 struct icl_pdu *response; 617 struct cfiscsi_session *cs; 618 union ctl_io *io; 619 int error; 620 621 cs = PDU_SESSION(request); 622 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 623 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 624 ctl_zero_io(io); 625 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 626 io->io_hdr.io_type = CTL_IO_TASK; 627 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 628 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 629 io->io_hdr.nexus.targ_target.id = 0; 630 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 631 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 632 633 switch (bhstmr->bhstmr_function & ~0x80) { 634 case BHSTMR_FUNCTION_ABORT_TASK: 635#if 0 636 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 637#endif 638 io->taskio.task_action = CTL_TASK_ABORT_TASK; 639 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 640 break; 641 case BHSTMR_FUNCTION_ABORT_TASK_SET: 642#if 0 643 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 644#endif 645 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 646 break; 647 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 648#if 0 649 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 650#endif 651 io->taskio.task_action = CTL_TASK_LUN_RESET; 652 break; 653 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 654#if 0 655 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 656#endif 657 io->taskio.task_action = CTL_TASK_TARGET_RESET; 658 break; 659 default: 660 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 661 bhstmr->bhstmr_function & ~0x80); 662 ctl_free_io(io); 663 664 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 665 if (response == NULL) { 666 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 667 "dropping connection"); 668 icl_pdu_free(request); 669 cfiscsi_session_terminate(cs); 670 return; 671 } 672 bhstmr2 = (struct iscsi_bhs_task_management_response *) 673 response->ip_bhs; 674 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 675 bhstmr2->bhstmr_flags = 0x80; 676 bhstmr2->bhstmr_response = 677 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 678 bhstmr2->bhstmr_initiator_task_tag = 679 bhstmr->bhstmr_initiator_task_tag; 680 icl_pdu_free(request); 681 cfiscsi_pdu_queue(response); 682 return; 683 } 684 685 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 686 error = ctl_queue(io); 687 if (error != CTL_RETVAL_COMPLETE) { 688 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 689 "dropping connection", error); 690 ctl_free_io(io); 691 refcount_release(&cs->cs_outstanding_ctl_pdus); 692 icl_pdu_free(request); 693 cfiscsi_session_terminate(cs); 694 } 695} 696 697static bool 698cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 699{ 700 struct iscsi_bhs_data_out *bhsdo; 701 struct cfiscsi_session *cs; 702 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 703 size_t copy_len, len, off, buffer_offset; 704 int ctl_sg_count; 705 union ctl_io *io; 706 707 cs = PDU_SESSION(request); 708 709 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 710 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 711 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 712 ISCSI_BHS_OPCODE_SCSI_COMMAND, 713 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 714 715 /* 716 * We're only using fields common for Data-Out and SCSI Command PDUs. 717 */ 718 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 719 720 io = cdw->cdw_ctl_io; 721 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 722 ("CTL_FLAG_DATA_IN")); 723 724#if 0 725 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 726 request->ip_data_len, io->scsiio.kern_total_len); 727#endif 728 729 if (io->scsiio.kern_sg_entries > 0) { 730 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 731 ctl_sg_count = io->scsiio.kern_sg_entries; 732 } else { 733 ctl_sglist = &ctl_sg_entry; 734 ctl_sglist->addr = io->scsiio.kern_data_ptr; 735 ctl_sglist->len = io->scsiio.kern_data_len; 736 ctl_sg_count = 1; 737 } 738 739 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 740 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 741 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 742 else 743 buffer_offset = 0; 744 len = icl_pdu_data_segment_length(request); 745 746 /* 747 * Make sure the offset, as sent by the initiator, matches the offset 748 * we're supposed to be at in the scatter-gather list. 749 */ 750 if (buffer_offset > 751 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 752 buffer_offset + len <= 753 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 754 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 755 "expected %zd; dropping connection", buffer_offset, 756 (size_t)io->scsiio.kern_rel_offset + 757 (size_t)io->scsiio.ext_data_filled); 758 ctl_set_data_phase_error(&io->scsiio); 759 cfiscsi_session_terminate(cs); 760 return (true); 761 } 762 763 /* 764 * This is the offset within the PDU data segment, as opposed 765 * to buffer_offset, which is the offset within the task (SCSI 766 * command). 767 */ 768 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 769 buffer_offset; 770 771 /* 772 * Iterate over the scatter/gather segments, filling them with data 773 * from the PDU data segment. Note that this can get called multiple 774 * times for one SCSI command; the cdw structure holds state for the 775 * scatter/gather list. 776 */ 777 for (;;) { 778 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 779 ("cdw->cdw_sg_index >= ctl_sg_count")); 780 if (cdw->cdw_sg_len == 0) { 781 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 782 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 783 } 784 KASSERT(off <= len, ("len > off")); 785 copy_len = len - off; 786 if (copy_len > cdw->cdw_sg_len) 787 copy_len = cdw->cdw_sg_len; 788 789 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 790 cdw->cdw_sg_addr += copy_len; 791 cdw->cdw_sg_len -= copy_len; 792 off += copy_len; 793 io->scsiio.ext_data_filled += copy_len; 794 795 if (cdw->cdw_sg_len == 0) { 796 /* 797 * End of current segment. 798 */ 799 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 800 /* 801 * Last segment in scatter/gather list. 802 */ 803 break; 804 } 805 cdw->cdw_sg_index++; 806 } 807 808 if (off == len) { 809 /* 810 * End of PDU payload. 811 */ 812 break; 813 } 814 } 815 816 if (len > off) { 817 /* 818 * In case of unsolicited data, it's possible that the buffer 819 * provided by CTL is smaller than negotiated FirstBurstLength. 820 * Just ignore the superfluous data; will ask for them with R2T 821 * on next call to cfiscsi_datamove(). 822 * 823 * This obviously can only happen with SCSI Command PDU. 824 */ 825 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 826 ISCSI_BHS_OPCODE_SCSI_COMMAND) 827 return (true); 828 829 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 830 "expected %zd; dropping connection", 831 icl_pdu_data_segment_length(request), off); 832 ctl_set_data_phase_error(&io->scsiio); 833 cfiscsi_session_terminate(cs); 834 return (true); 835 } 836 837 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 838 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 839 CFISCSI_SESSION_WARN(cs, "got the final packet without " 840 "the F flag; flags = 0x%x; dropping connection", 841 bhsdo->bhsdo_flags); 842 ctl_set_data_phase_error(&io->scsiio); 843 cfiscsi_session_terminate(cs); 844 return (true); 845 } 846 847 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 848 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 849 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 850 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 851 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 852 "transmitted size was %zd bytes instead of %d; " 853 "dropping connection", 854 (size_t)io->scsiio.ext_data_filled, 855 cdw->cdw_r2t_end); 856 ctl_set_data_phase_error(&io->scsiio); 857 cfiscsi_session_terminate(cs); 858 return (true); 859 } else { 860 /* 861 * For SCSI Command PDU, this just means we need to 862 * solicit more data by sending R2T. 863 */ 864 return (false); 865 } 866 } 867 868 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 869#if 0 870 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 871 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 872#endif 873 874 return (true); 875 } 876 877 return (false); 878} 879 880static void 881cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 882{ 883 struct iscsi_bhs_data_out *bhsdo; 884 struct cfiscsi_session *cs; 885 struct cfiscsi_data_wait *cdw = NULL; 886 union ctl_io *io; 887 bool done; 888 889 cs = PDU_SESSION(request); 890 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 891 892 CFISCSI_SESSION_LOCK(cs); 893 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 894#if 0 895 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 896 "ttt 0x%x, itt 0x%x", 897 bhsdo->bhsdo_target_transfer_tag, 898 bhsdo->bhsdo_initiator_task_tag, 899 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 900#endif 901 if (bhsdo->bhsdo_target_transfer_tag == 902 cdw->cdw_target_transfer_tag) 903 break; 904 } 905 CFISCSI_SESSION_UNLOCK(cs); 906 if (cdw == NULL) { 907 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 908 "0x%x, not found; dropping connection", 909 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 910 icl_pdu_free(request); 911 cfiscsi_session_terminate(cs); 912 return; 913 } 914 915 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 916 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 917 "DataSN %u, while expected %u; dropping connection", 918 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 919 icl_pdu_free(request); 920 cfiscsi_session_terminate(cs); 921 return; 922 } 923 cdw->cdw_datasn++; 924 925 io = cdw->cdw_ctl_io; 926 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 927 ("CTL_FLAG_DATA_IN")); 928 929 done = cfiscsi_handle_data_segment(request, cdw); 930 if (done) { 931 CFISCSI_SESSION_LOCK(cs); 932 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 933 CFISCSI_SESSION_UNLOCK(cs); 934 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 935 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 936 cfiscsi_data_wait_free(cs, cdw); 937 if (done) 938 io->scsiio.be_move_done(io); 939 else 940 cfiscsi_datamove_out(io); 941 } 942 943 icl_pdu_free(request); 944} 945 946static void 947cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 948{ 949 struct iscsi_bhs_logout_request *bhslr; 950 struct iscsi_bhs_logout_response *bhslr2; 951 struct icl_pdu *response; 952 struct cfiscsi_session *cs; 953 954 cs = PDU_SESSION(request); 955 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 956 switch (bhslr->bhslr_reason & 0x7f) { 957 case BHSLR_REASON_CLOSE_SESSION: 958 case BHSLR_REASON_CLOSE_CONNECTION: 959 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 960 if (response == NULL) { 961 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 962 icl_pdu_free(request); 963 cfiscsi_session_terminate(cs); 964 return; 965 } 966 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 967 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 968 bhslr2->bhslr_flags = 0x80; 969 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 970 bhslr2->bhslr_initiator_task_tag = 971 bhslr->bhslr_initiator_task_tag; 972 icl_pdu_free(request); 973 cfiscsi_pdu_queue(response); 974 cfiscsi_session_terminate(cs); 975 break; 976 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 977 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 978 if (response == NULL) { 979 CFISCSI_SESSION_WARN(cs, 980 "failed to allocate memory; dropping connection"); 981 icl_pdu_free(request); 982 cfiscsi_session_terminate(cs); 983 return; 984 } 985 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 986 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 987 bhslr2->bhslr_flags = 0x80; 988 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 989 bhslr2->bhslr_initiator_task_tag = 990 bhslr->bhslr_initiator_task_tag; 991 icl_pdu_free(request); 992 cfiscsi_pdu_queue(response); 993 break; 994 default: 995 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 996 bhslr->bhslr_reason); 997 icl_pdu_free(request); 998 cfiscsi_session_terminate(cs); 999 break; 1000 } 1001} 1002 1003static void 1004cfiscsi_callout(void *context) 1005{ 1006 struct icl_pdu *cp; 1007 struct iscsi_bhs_nop_in *bhsni; 1008 struct cfiscsi_session *cs; 1009 1010 cs = context; 1011 1012 if (cs->cs_terminating) 1013 return; 1014 1015 callout_schedule(&cs->cs_callout, 1 * hz); 1016 1017 atomic_add_int(&cs->cs_timeout, 1); 1018 1019#ifdef ICL_KERNEL_PROXY 1020 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1021 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1022 CFISCSI_SESSION_WARN(cs, "login timed out after " 1023 "%d seconds; dropping connection", cs->cs_timeout); 1024 cfiscsi_session_terminate(cs); 1025 } 1026 return; 1027 } 1028#endif 1029 1030 if (ping_timeout <= 0) { 1031 /* 1032 * Pings are disabled. Don't send NOP-In in this case; 1033 * user might have disabled pings to work around problems 1034 * with certain initiators that can't properly handle 1035 * NOP-In, such as iPXE. Reset the timeout, to avoid 1036 * triggering reconnection, should the user decide to 1037 * reenable them. 1038 */ 1039 cs->cs_timeout = 0; 1040 return; 1041 } 1042 1043 if (cs->cs_timeout >= ping_timeout) { 1044 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1045 "dropping connection", ping_timeout); 1046 cfiscsi_session_terminate(cs); 1047 return; 1048 } 1049 1050 /* 1051 * If the ping was reset less than one second ago - which means 1052 * that we've received some PDU during the last second - assume 1053 * the traffic flows correctly and don't bother sending a NOP-Out. 1054 * 1055 * (It's 2 - one for one second, and one for incrementing is_timeout 1056 * earlier in this routine.) 1057 */ 1058 if (cs->cs_timeout < 2) 1059 return; 1060 1061 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1062 if (cp == NULL) { 1063 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1064 return; 1065 } 1066 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1067 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1068 bhsni->bhsni_flags = 0x80; 1069 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1070 1071 cfiscsi_pdu_queue(cp); 1072} 1073 1074static struct cfiscsi_data_wait * 1075cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1076 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1077{ 1078 struct cfiscsi_data_wait *cdw; 1079 int error; 1080 1081 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1082 if (cdw == NULL) { 1083 CFISCSI_SESSION_WARN(cs, 1084 "failed to allocate %zd bytes", sizeof(*cdw)); 1085 return (NULL); 1086 } 1087 1088 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1089 &cdw->cdw_icl_prv); 1090 if (error != 0) { 1091 CFISCSI_SESSION_WARN(cs, 1092 "icl_conn_transfer_setup() failed with error %d", error); 1093 uma_zfree(cfiscsi_data_wait_zone, cdw); 1094 return (NULL); 1095 } 1096 1097 cdw->cdw_ctl_io = io; 1098 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1099 cdw->cdw_initiator_task_tag = initiator_task_tag; 1100 1101 return (cdw); 1102} 1103 1104static void 1105cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1106 struct cfiscsi_data_wait *cdw) 1107{ 1108 1109 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1110 uma_zfree(cfiscsi_data_wait_zone, cdw); 1111} 1112 1113static void 1114cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1115{ 1116 struct cfiscsi_data_wait *cdw; 1117 union ctl_io *io; 1118 int error, last, wait; 1119 1120 if (cs->cs_target == NULL) 1121 return; /* No target yet, so nothing to do. */ 1122 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1123 ctl_zero_io(io); 1124 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1125 io->io_hdr.io_type = CTL_IO_TASK; 1126 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1127 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1128 io->io_hdr.nexus.targ_target.id = 0; 1129 io->io_hdr.nexus.targ_lun = 0; 1130 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1131 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1132 wait = cs->cs_outstanding_ctl_pdus; 1133 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1134 error = ctl_queue(io); 1135 if (error != CTL_RETVAL_COMPLETE) { 1136 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1137 refcount_release(&cs->cs_outstanding_ctl_pdus); 1138 ctl_free_io(io); 1139 } 1140 1141 CFISCSI_SESSION_LOCK(cs); 1142 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1143 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1144 CFISCSI_SESSION_UNLOCK(cs); 1145 /* 1146 * Set nonzero port status; this prevents backends from 1147 * assuming that the data transfer actually succeeded 1148 * and writing uninitialized data to disk. 1149 */ 1150 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1151 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1152 cfiscsi_data_wait_free(cs, cdw); 1153 CFISCSI_SESSION_LOCK(cs); 1154 } 1155 CFISCSI_SESSION_UNLOCK(cs); 1156 1157 /* 1158 * Wait for CTL to terminate all the tasks. 1159 */ 1160 if (wait > 0) 1161 CFISCSI_SESSION_WARN(cs, 1162 "waiting for CTL to terminate %d tasks", wait); 1163 for (;;) { 1164 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1165 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1166 if (last != 0) 1167 break; 1168 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1169 0, "cfiscsi_terminate", hz / 100); 1170 } 1171 if (wait > 0) 1172 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1173} 1174 1175static void 1176cfiscsi_maintenance_thread(void *arg) 1177{ 1178 struct cfiscsi_session *cs; 1179 1180 cs = arg; 1181 1182 for (;;) { 1183 CFISCSI_SESSION_LOCK(cs); 1184 if (cs->cs_terminating == false) 1185 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1186 CFISCSI_SESSION_UNLOCK(cs); 1187 1188 if (cs->cs_terminating) { 1189 1190 /* 1191 * We used to wait up to 30 seconds to deliver queued 1192 * PDUs to the initiator. We also tried hard to deliver 1193 * SCSI Responses for the aborted PDUs. We don't do 1194 * that anymore. We might need to revisit that. 1195 */ 1196 callout_drain(&cs->cs_callout); 1197 icl_conn_close(cs->cs_conn); 1198 1199 /* 1200 * At this point ICL receive thread is no longer 1201 * running; no new tasks can be queued. 1202 */ 1203 cfiscsi_session_terminate_tasks(cs); 1204 cfiscsi_session_delete(cs); 1205 kthread_exit(); 1206 return; 1207 } 1208 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1209 } 1210} 1211 1212static void 1213cfiscsi_session_terminate(struct cfiscsi_session *cs) 1214{ 1215 1216 if (cs->cs_terminating) 1217 return; 1218 cs->cs_terminating = true; 1219 cv_signal(&cs->cs_maintenance_cv); 1220#ifdef ICL_KERNEL_PROXY 1221 cv_signal(&cs->cs_login_cv); 1222#endif 1223} 1224 1225static int 1226cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1227{ 1228 struct cfiscsi_target *ct; 1229 char *name; 1230 int i; 1231 1232 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1233 1234 ct = cs->cs_target; 1235 name = strdup(cs->cs_initiator_id, M_CTL); 1236 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1237 if (i < 0) { 1238 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1239 i); 1240 cs->cs_ctl_initid = -1; 1241 return (1); 1242 } 1243 cs->cs_ctl_initid = i; 1244#if 0 1245 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1246#endif 1247 1248 return (0); 1249} 1250 1251static void 1252cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1253{ 1254 int error; 1255 1256 if (cs->cs_ctl_initid == -1) 1257 return; 1258 1259 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1260 if (error != 0) { 1261 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1262 error); 1263 } 1264 cs->cs_ctl_initid = -1; 1265} 1266 1267static struct cfiscsi_session * 1268cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1269{ 1270 struct cfiscsi_session *cs; 1271 int error; 1272 1273 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1274 if (cs == NULL) { 1275 CFISCSI_WARN("malloc failed"); 1276 return (NULL); 1277 } 1278 cs->cs_ctl_initid = -1; 1279 1280 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1281 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1282 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1283 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1284#ifdef ICL_KERNEL_PROXY 1285 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1286#endif 1287 1288 cs->cs_conn = icl_new_conn(offload, "cfiscsi", &cs->cs_lock); 1289 if (cs->cs_conn == NULL) { 1290 free(cs, M_CFISCSI); 1291 return (NULL); 1292 } 1293 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1294 cs->cs_conn->ic_error = cfiscsi_error_callback; 1295 cs->cs_conn->ic_prv0 = cs; 1296 1297 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1298 if (error != 0) { 1299 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1300 free(cs, M_CFISCSI); 1301 return (NULL); 1302 } 1303 1304 mtx_lock(&softc->lock); 1305 cs->cs_id = ++softc->last_session_id; 1306 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1307 mtx_unlock(&softc->lock); 1308 1309 /* 1310 * Start pinging the initiator. 1311 */ 1312 callout_init(&cs->cs_callout, 1); 1313 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1314 1315 return (cs); 1316} 1317 1318static void 1319cfiscsi_session_delete(struct cfiscsi_session *cs) 1320{ 1321 struct cfiscsi_softc *softc; 1322 1323 softc = &cfiscsi_softc; 1324 1325 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1326 ("destroying session with outstanding CTL pdus")); 1327 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1328 ("destroying session with non-empty queue")); 1329 1330 cfiscsi_session_unregister_initiator(cs); 1331 if (cs->cs_target != NULL) 1332 cfiscsi_target_release(cs->cs_target); 1333 icl_conn_close(cs->cs_conn); 1334 icl_conn_free(cs->cs_conn); 1335 1336 mtx_lock(&softc->lock); 1337 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1338 cv_signal(&softc->sessions_cv); 1339 mtx_unlock(&softc->lock); 1340 1341 free(cs, M_CFISCSI); 1342} 1343 1344int 1345cfiscsi_init(void) 1346{ 1347 struct cfiscsi_softc *softc; 1348 int retval; 1349 1350 softc = &cfiscsi_softc; 1351 retval = 0; 1352 bzero(softc, sizeof(*softc)); 1353 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1354 1355 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1356#ifdef ICL_KERNEL_PROXY 1357 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1358#endif 1359 TAILQ_INIT(&softc->sessions); 1360 TAILQ_INIT(&softc->targets); 1361 1362 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1363 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1364 UMA_ALIGN_PTR, 0); 1365 1366 return (0); 1367} 1368 1369#ifdef ICL_KERNEL_PROXY 1370static void 1371cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1372{ 1373 struct cfiscsi_session *cs; 1374 1375 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1376 if (cs == NULL) { 1377 CFISCSI_WARN("failed to create session"); 1378 return; 1379 } 1380 1381 icl_conn_handoff_sock(cs->cs_conn, so); 1382 cs->cs_initiator_sa = sa; 1383 cs->cs_portal_id = portal_id; 1384 cs->cs_waiting_for_ctld = true; 1385 cv_signal(&cfiscsi_softc.accept_cv); 1386} 1387#endif 1388 1389static void 1390cfiscsi_online(void *arg) 1391{ 1392 struct cfiscsi_softc *softc; 1393 struct cfiscsi_target *ct; 1394 int online; 1395 1396 ct = (struct cfiscsi_target *)arg; 1397 softc = ct->ct_softc; 1398 1399 mtx_lock(&softc->lock); 1400 if (ct->ct_online) { 1401 mtx_unlock(&softc->lock); 1402 return; 1403 } 1404 ct->ct_online = 1; 1405 online = softc->online++; 1406 mtx_unlock(&softc->lock); 1407 if (online > 0) 1408 return; 1409 1410#ifdef ICL_KERNEL_PROXY 1411 if (softc->listener != NULL) 1412 icl_listen_free(softc->listener); 1413 softc->listener = icl_listen_new(cfiscsi_accept); 1414#endif 1415} 1416 1417static void 1418cfiscsi_offline(void *arg) 1419{ 1420 struct cfiscsi_softc *softc; 1421 struct cfiscsi_target *ct; 1422 struct cfiscsi_session *cs; 1423 int online; 1424 1425 ct = (struct cfiscsi_target *)arg; 1426 softc = ct->ct_softc; 1427 1428 mtx_lock(&softc->lock); 1429 if (!ct->ct_online) { 1430 mtx_unlock(&softc->lock); 1431 return; 1432 } 1433 ct->ct_online = 0; 1434 online = --softc->online; 1435 1436 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1437 if (cs->cs_target == ct) 1438 cfiscsi_session_terminate(cs); 1439 } 1440 do { 1441 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1442 if (cs->cs_target == ct) 1443 break; 1444 } 1445 if (cs != NULL) 1446 cv_wait(&softc->sessions_cv, &softc->lock); 1447 } while (cs != NULL && ct->ct_online == 0); 1448 mtx_unlock(&softc->lock); 1449 if (online > 0) 1450 return; 1451 1452#ifdef ICL_KERNEL_PROXY 1453 icl_listen_free(softc->listener); 1454 softc->listener = NULL; 1455#endif 1456} 1457 1458static int 1459cfiscsi_info(void *arg, struct sbuf *sb) 1460{ 1461 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1462 int retval; 1463 1464 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1465 ct->ct_state); 1466 return (retval); 1467} 1468 1469static void 1470cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1471{ 1472 struct cfiscsi_softc *softc; 1473 struct cfiscsi_session *cs, *cs2; 1474 struct cfiscsi_target *ct; 1475 struct ctl_iscsi_handoff_params *cihp; 1476 int error; 1477 1478 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1479 softc = &cfiscsi_softc; 1480 1481 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1482 cihp->initiator_name, cihp->initiator_addr, 1483 cihp->target_name); 1484 1485 ct = cfiscsi_target_find(softc, cihp->target_name, 1486 cihp->portal_group_tag); 1487 if (ct == NULL) { 1488 ci->status = CTL_ISCSI_ERROR; 1489 snprintf(ci->error_str, sizeof(ci->error_str), 1490 "%s: target not found", __func__); 1491 return; 1492 } 1493 1494#ifdef ICL_KERNEL_PROXY 1495 if (cihp->socket > 0 && cihp->connection_id > 0) { 1496 snprintf(ci->error_str, sizeof(ci->error_str), 1497 "both socket and connection_id set"); 1498 ci->status = CTL_ISCSI_ERROR; 1499 cfiscsi_target_release(ct); 1500 return; 1501 } 1502 if (cihp->socket == 0) { 1503 mtx_lock(&cfiscsi_softc.lock); 1504 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1505 if (cs->cs_id == cihp->connection_id) 1506 break; 1507 } 1508 if (cs == NULL) { 1509 mtx_unlock(&cfiscsi_softc.lock); 1510 snprintf(ci->error_str, sizeof(ci->error_str), 1511 "connection not found"); 1512 ci->status = CTL_ISCSI_ERROR; 1513 cfiscsi_target_release(ct); 1514 return; 1515 } 1516 mtx_unlock(&cfiscsi_softc.lock); 1517 } else { 1518#endif 1519 cs = cfiscsi_session_new(softc, cihp->offload); 1520 if (cs == NULL) { 1521 ci->status = CTL_ISCSI_ERROR; 1522 snprintf(ci->error_str, sizeof(ci->error_str), 1523 "%s: cfiscsi_session_new failed", __func__); 1524 cfiscsi_target_release(ct); 1525 return; 1526 } 1527#ifdef ICL_KERNEL_PROXY 1528 } 1529#endif 1530 1531 /* 1532 * First PDU of Full Feature phase has the same CmdSN as the last 1533 * PDU from the Login Phase received from the initiator. Thus, 1534 * the -1 below. 1535 */ 1536 cs->cs_cmdsn = cihp->cmdsn; 1537 cs->cs_statsn = cihp->statsn; 1538 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1539 cs->cs_max_burst_length = cihp->max_burst_length; 1540 cs->cs_immediate_data = !!cihp->immediate_data; 1541 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1542 cs->cs_conn->ic_header_crc32c = true; 1543 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1544 cs->cs_conn->ic_data_crc32c = true; 1545 1546 strlcpy(cs->cs_initiator_name, 1547 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1548 strlcpy(cs->cs_initiator_addr, 1549 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1550 strlcpy(cs->cs_initiator_alias, 1551 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1552 memcpy(cs->cs_initiator_isid, 1553 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1554 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1555 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1556 cihp->initiator_isid[0], cihp->initiator_isid[1], 1557 cihp->initiator_isid[2], cihp->initiator_isid[3], 1558 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1559 1560 mtx_lock(&softc->lock); 1561 if (ct->ct_online == 0) { 1562 mtx_unlock(&softc->lock); 1563 cfiscsi_session_terminate(cs); 1564 cfiscsi_target_release(ct); 1565 ci->status = CTL_ISCSI_ERROR; 1566 snprintf(ci->error_str, sizeof(ci->error_str), 1567 "%s: port offline", __func__); 1568 return; 1569 } 1570 cs->cs_target = ct; 1571 mtx_unlock(&softc->lock); 1572 1573 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1574restart: 1575 if (!cs->cs_terminating) { 1576 mtx_lock(&softc->lock); 1577 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1578 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1579 cs->cs_target == cs2->cs_target && 1580 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1581 cfiscsi_session_terminate(cs2); 1582 mtx_unlock(&softc->lock); 1583 pause("cfiscsi_reinstate", 1); 1584 goto restart; 1585 } 1586 } 1587 mtx_unlock(&softc->lock); 1588 } 1589 1590 /* 1591 * Register initiator with CTL. 1592 */ 1593 cfiscsi_session_register_initiator(cs); 1594 1595#ifdef ICL_KERNEL_PROXY 1596 if (cihp->socket > 0) { 1597#endif 1598 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1599 if (error != 0) { 1600 cfiscsi_session_terminate(cs); 1601 refcount_release(&cs->cs_outstanding_ctl_pdus); 1602 ci->status = CTL_ISCSI_ERROR; 1603 snprintf(ci->error_str, sizeof(ci->error_str), 1604 "%s: icl_conn_handoff failed with error %d", 1605 __func__, error); 1606 return; 1607 } 1608#ifdef ICL_KERNEL_PROXY 1609 } 1610#endif 1611 1612#ifdef ICL_KERNEL_PROXY 1613 cs->cs_login_phase = false; 1614 1615 /* 1616 * First PDU of the Full Feature phase has likely already arrived. 1617 * We have to pick it up and execute properly. 1618 */ 1619 if (cs->cs_login_pdu != NULL) { 1620 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1621 cfiscsi_pdu_handle(cs->cs_login_pdu); 1622 cs->cs_login_pdu = NULL; 1623 } 1624#endif 1625 1626 refcount_release(&cs->cs_outstanding_ctl_pdus); 1627 ci->status = CTL_ISCSI_OK; 1628} 1629 1630static void 1631cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1632{ 1633 struct ctl_iscsi_list_params *cilp; 1634 struct cfiscsi_session *cs; 1635 struct cfiscsi_softc *softc; 1636 struct sbuf *sb; 1637 int error; 1638 1639 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1640 softc = &cfiscsi_softc; 1641 1642 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1643 if (sb == NULL) { 1644 ci->status = CTL_ISCSI_ERROR; 1645 snprintf(ci->error_str, sizeof(ci->error_str), 1646 "Unable to allocate %d bytes for iSCSI session list", 1647 cilp->alloc_len); 1648 return; 1649 } 1650 1651 sbuf_printf(sb, "<ctlislist>\n"); 1652 mtx_lock(&softc->lock); 1653 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1654#ifdef ICL_KERNEL_PROXY 1655 if (cs->cs_target == NULL) 1656 continue; 1657#endif 1658 error = sbuf_printf(sb, "<connection id=\"%d\">" 1659 "<initiator>%s</initiator>" 1660 "<initiator_addr>%s</initiator_addr>" 1661 "<initiator_alias>%s</initiator_alias>" 1662 "<target>%s</target>" 1663 "<target_alias>%s</target_alias>" 1664 "<target_portal_group_tag>%u</target_portal_group_tag>" 1665 "<header_digest>%s</header_digest>" 1666 "<data_digest>%s</data_digest>" 1667 "<max_data_segment_length>%zd</max_data_segment_length>" 1668 "<immediate_data>%d</immediate_data>" 1669 "<iser>%d</iser>" 1670 "<offload>%s</offload>" 1671 "</connection>\n", 1672 cs->cs_id, 1673 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1674 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1675 cs->cs_target->ct_tag, 1676 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1677 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1678 cs->cs_max_data_segment_length, 1679 cs->cs_immediate_data, 1680 cs->cs_conn->ic_iser, 1681 cs->cs_conn->ic_offload); 1682 if (error != 0) 1683 break; 1684 } 1685 mtx_unlock(&softc->lock); 1686 error = sbuf_printf(sb, "</ctlislist>\n"); 1687 if (error != 0) { 1688 sbuf_delete(sb); 1689 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1690 snprintf(ci->error_str, sizeof(ci->error_str), 1691 "Out of space, %d bytes is too small", cilp->alloc_len); 1692 return; 1693 } 1694 sbuf_finish(sb); 1695 1696 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1697 cilp->fill_len = sbuf_len(sb) + 1; 1698 ci->status = CTL_ISCSI_OK; 1699 sbuf_delete(sb); 1700} 1701 1702static void 1703cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1704{ 1705 struct icl_pdu *response; 1706 struct iscsi_bhs_asynchronous_message *bhsam; 1707 struct ctl_iscsi_logout_params *cilp; 1708 struct cfiscsi_session *cs; 1709 struct cfiscsi_softc *softc; 1710 int found = 0; 1711 1712 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1713 softc = &cfiscsi_softc; 1714 1715 mtx_lock(&softc->lock); 1716 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1717 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1718 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1719 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1720 continue; 1721 1722 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1723 if (response == NULL) { 1724 ci->status = CTL_ISCSI_ERROR; 1725 snprintf(ci->error_str, sizeof(ci->error_str), 1726 "Unable to allocate memory"); 1727 mtx_unlock(&softc->lock); 1728 return; 1729 } 1730 bhsam = 1731 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1732 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1733 bhsam->bhsam_flags = 0x80; 1734 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1735 bhsam->bhsam_parameter3 = htons(10); 1736 cfiscsi_pdu_queue(response); 1737 found++; 1738 } 1739 mtx_unlock(&softc->lock); 1740 1741 if (found == 0) { 1742 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1743 snprintf(ci->error_str, sizeof(ci->error_str), 1744 "No matching connections found"); 1745 return; 1746 } 1747 1748 ci->status = CTL_ISCSI_OK; 1749} 1750 1751static void 1752cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1753{ 1754 struct icl_pdu *response; 1755 struct iscsi_bhs_asynchronous_message *bhsam; 1756 struct ctl_iscsi_terminate_params *citp; 1757 struct cfiscsi_session *cs; 1758 struct cfiscsi_softc *softc; 1759 int found = 0; 1760 1761 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1762 softc = &cfiscsi_softc; 1763 1764 mtx_lock(&softc->lock); 1765 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1766 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1767 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1768 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1769 continue; 1770 1771 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1772 if (response == NULL) { 1773 /* 1774 * Oh well. Just terminate the connection. 1775 */ 1776 } else { 1777 bhsam = (struct iscsi_bhs_asynchronous_message *) 1778 response->ip_bhs; 1779 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1780 bhsam->bhsam_flags = 0x80; 1781 bhsam->bhsam_0xffffffff = 0xffffffff; 1782 bhsam->bhsam_async_event = 1783 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1784 cfiscsi_pdu_queue(response); 1785 } 1786 cfiscsi_session_terminate(cs); 1787 found++; 1788 } 1789 mtx_unlock(&softc->lock); 1790 1791 if (found == 0) { 1792 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1793 snprintf(ci->error_str, sizeof(ci->error_str), 1794 "No matching connections found"); 1795 return; 1796 } 1797 1798 ci->status = CTL_ISCSI_OK; 1799} 1800 1801static void 1802cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1803{ 1804 struct ctl_iscsi_limits_params *cilp; 1805 int error; 1806 1807 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1808 1809 error = icl_limits(cilp->offload, &cilp->data_segment_limit); 1810 if (error != 0) { 1811 ci->status = CTL_ISCSI_ERROR; 1812 snprintf(ci->error_str, sizeof(ci->error_str), 1813 "%s: icl_limits failed with error %d", 1814 __func__, error); 1815 return; 1816 } 1817 1818 ci->status = CTL_ISCSI_OK; 1819} 1820 1821#ifdef ICL_KERNEL_PROXY 1822static void 1823cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1824{ 1825 struct ctl_iscsi_listen_params *cilp; 1826 struct sockaddr *sa; 1827 int error; 1828 1829 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1830 1831 if (cfiscsi_softc.listener == NULL) { 1832 CFISCSI_DEBUG("no listener"); 1833 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1834 ci->status = CTL_ISCSI_ERROR; 1835 return; 1836 } 1837 1838 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1839 if (error != 0) { 1840 CFISCSI_DEBUG("getsockaddr, error %d", error); 1841 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1842 ci->status = CTL_ISCSI_ERROR; 1843 return; 1844 } 1845 1846 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1847 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1848 if (error != 0) { 1849 free(sa, M_SONAME); 1850 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1851 snprintf(ci->error_str, sizeof(ci->error_str), 1852 "icl_listen_add failed, error %d", error); 1853 ci->status = CTL_ISCSI_ERROR; 1854 return; 1855 } 1856 1857 ci->status = CTL_ISCSI_OK; 1858} 1859 1860static void 1861cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1862{ 1863 struct ctl_iscsi_accept_params *ciap; 1864 struct cfiscsi_session *cs; 1865 int error; 1866 1867 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1868 1869 mtx_lock(&cfiscsi_softc.lock); 1870 for (;;) { 1871 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1872 if (cs->cs_waiting_for_ctld) 1873 break; 1874 } 1875 if (cs != NULL) 1876 break; 1877 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1878 if (error != 0) { 1879 mtx_unlock(&cfiscsi_softc.lock); 1880 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1881 ci->status = CTL_ISCSI_ERROR; 1882 return; 1883 } 1884 } 1885 mtx_unlock(&cfiscsi_softc.lock); 1886 1887 cs->cs_waiting_for_ctld = false; 1888 cs->cs_login_phase = true; 1889 1890 ciap->connection_id = cs->cs_id; 1891 ciap->portal_id = cs->cs_portal_id; 1892 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1893 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1894 cs->cs_initiator_sa->sa_len); 1895 if (error != 0) { 1896 snprintf(ci->error_str, sizeof(ci->error_str), 1897 "copyout failed with error %d", error); 1898 ci->status = CTL_ISCSI_ERROR; 1899 return; 1900 } 1901 1902 ci->status = CTL_ISCSI_OK; 1903} 1904 1905static void 1906cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1907{ 1908 struct ctl_iscsi_send_params *cisp; 1909 struct cfiscsi_session *cs; 1910 struct icl_pdu *ip; 1911 size_t datalen; 1912 void *data; 1913 int error; 1914 1915 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1916 1917 mtx_lock(&cfiscsi_softc.lock); 1918 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1919 if (cs->cs_id == cisp->connection_id) 1920 break; 1921 } 1922 if (cs == NULL) { 1923 mtx_unlock(&cfiscsi_softc.lock); 1924 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1925 ci->status = CTL_ISCSI_ERROR; 1926 return; 1927 } 1928 mtx_unlock(&cfiscsi_softc.lock); 1929 1930#if 0 1931 if (cs->cs_login_phase == false) 1932 return (EBUSY); 1933#endif 1934 1935 if (cs->cs_terminating) { 1936 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1937 ci->status = CTL_ISCSI_ERROR; 1938 return; 1939 } 1940 1941 datalen = cisp->data_segment_len; 1942 /* 1943 * XXX 1944 */ 1945 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1946 if (datalen > 65535) { 1947 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1948 ci->status = CTL_ISCSI_ERROR; 1949 return; 1950 } 1951 if (datalen > 0) { 1952 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1953 error = copyin(cisp->data_segment, data, datalen); 1954 if (error != 0) { 1955 free(data, M_CFISCSI); 1956 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1957 ci->status = CTL_ISCSI_ERROR; 1958 return; 1959 } 1960 } 1961 1962 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1963 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1964 if (datalen > 0) { 1965 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1966 free(data, M_CFISCSI); 1967 } 1968 CFISCSI_SESSION_LOCK(cs); 1969 icl_pdu_queue(ip); 1970 CFISCSI_SESSION_UNLOCK(cs); 1971 ci->status = CTL_ISCSI_OK; 1972} 1973 1974static void 1975cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1976{ 1977 struct ctl_iscsi_receive_params *cirp; 1978 struct cfiscsi_session *cs; 1979 struct icl_pdu *ip; 1980 void *data; 1981 int error; 1982 1983 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1984 1985 mtx_lock(&cfiscsi_softc.lock); 1986 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1987 if (cs->cs_id == cirp->connection_id) 1988 break; 1989 } 1990 if (cs == NULL) { 1991 mtx_unlock(&cfiscsi_softc.lock); 1992 snprintf(ci->error_str, sizeof(ci->error_str), 1993 "connection not found"); 1994 ci->status = CTL_ISCSI_ERROR; 1995 return; 1996 } 1997 mtx_unlock(&cfiscsi_softc.lock); 1998 1999#if 0 2000 if (is->is_login_phase == false) 2001 return (EBUSY); 2002#endif 2003 2004 CFISCSI_SESSION_LOCK(cs); 2005 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2006 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2007 if (error != 0) { 2008 CFISCSI_SESSION_UNLOCK(cs); 2009 snprintf(ci->error_str, sizeof(ci->error_str), 2010 "interrupted by signal"); 2011 ci->status = CTL_ISCSI_ERROR; 2012 return; 2013 } 2014 } 2015 2016 if (cs->cs_terminating) { 2017 CFISCSI_SESSION_UNLOCK(cs); 2018 snprintf(ci->error_str, sizeof(ci->error_str), 2019 "connection terminating"); 2020 ci->status = CTL_ISCSI_ERROR; 2021 return; 2022 } 2023 ip = cs->cs_login_pdu; 2024 cs->cs_login_pdu = NULL; 2025 CFISCSI_SESSION_UNLOCK(cs); 2026 2027 if (ip->ip_data_len > cirp->data_segment_len) { 2028 icl_pdu_free(ip); 2029 snprintf(ci->error_str, sizeof(ci->error_str), 2030 "data segment too big"); 2031 ci->status = CTL_ISCSI_ERROR; 2032 return; 2033 } 2034 2035 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2036 if (ip->ip_data_len > 0) { 2037 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2038 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2039 copyout(data, cirp->data_segment, ip->ip_data_len); 2040 free(data, M_CFISCSI); 2041 } 2042 2043 icl_pdu_free(ip); 2044 ci->status = CTL_ISCSI_OK; 2045} 2046 2047#endif /* !ICL_KERNEL_PROXY */ 2048 2049static void 2050cfiscsi_ioctl_port_create(struct ctl_req *req) 2051{ 2052 struct cfiscsi_target *ct; 2053 struct ctl_port *port; 2054 const char *target, *alias, *tags; 2055 struct scsi_vpd_id_descriptor *desc; 2056 ctl_options_t opts; 2057 int retval, len, idlen; 2058 uint16_t tag; 2059 2060 ctl_init_opts(&opts, req->num_args, req->kern_args); 2061 target = ctl_get_opt(&opts, "cfiscsi_target"); 2062 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2063 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2064 if (target == NULL || tags == NULL) { 2065 req->status = CTL_LUN_ERROR; 2066 snprintf(req->error_str, sizeof(req->error_str), 2067 "Missing required argument"); 2068 ctl_free_opts(&opts); 2069 return; 2070 } 2071 tag = strtol(tags, (char **)NULL, 10); 2072 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2073 if (ct == NULL) { 2074 req->status = CTL_LUN_ERROR; 2075 snprintf(req->error_str, sizeof(req->error_str), 2076 "failed to create target \"%s\"", target); 2077 ctl_free_opts(&opts); 2078 return; 2079 } 2080 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2081 req->status = CTL_LUN_ERROR; 2082 snprintf(req->error_str, sizeof(req->error_str), 2083 "target \"%s\" already exists", target); 2084 cfiscsi_target_release(ct); 2085 ctl_free_opts(&opts); 2086 return; 2087 } 2088 port = &ct->ct_port; 2089 // WAT 2090 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2091 goto done; 2092 2093 port->frontend = &cfiscsi_frontend; 2094 port->port_type = CTL_PORT_ISCSI; 2095 /* XXX KDM what should the real number be here? */ 2096 port->num_requested_ctl_io = 4096; 2097 port->port_name = "iscsi"; 2098 port->physical_port = tag; 2099 port->virtual_port = ct->ct_target_id; 2100 port->port_online = cfiscsi_online; 2101 port->port_offline = cfiscsi_offline; 2102 port->port_info = cfiscsi_info; 2103 port->onoff_arg = ct; 2104 port->lun_enable = cfiscsi_lun_enable; 2105 port->lun_disable = cfiscsi_lun_disable; 2106 port->targ_lun_arg = ct; 2107 port->fe_datamove = cfiscsi_datamove; 2108 port->fe_done = cfiscsi_done; 2109 2110 /* XXX KDM what should we report here? */ 2111 /* XXX These should probably be fetched from CTL. */ 2112 port->max_targets = 1; 2113 port->max_target_id = 15; 2114 2115 port->options = opts; 2116 STAILQ_INIT(&opts); 2117 2118 /* Generate Port ID. */ 2119 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2120 idlen = roundup2(idlen, 4); 2121 len = sizeof(struct scsi_vpd_device_id) + idlen; 2122 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2123 M_CTL, M_WAITOK | M_ZERO); 2124 port->port_devid->len = len; 2125 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2126 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2127 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2128 SVPD_ID_TYPE_SCSI_NAME; 2129 desc->length = idlen; 2130 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2131 2132 /* Generate Target ID. */ 2133 idlen = strlen(target) + 1; 2134 idlen = roundup2(idlen, 4); 2135 len = sizeof(struct scsi_vpd_device_id) + idlen; 2136 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2137 M_CTL, M_WAITOK | M_ZERO); 2138 port->target_devid->len = len; 2139 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2140 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2141 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2142 SVPD_ID_TYPE_SCSI_NAME; 2143 desc->length = idlen; 2144 strlcpy(desc->identifier, target, idlen); 2145 2146 retval = ctl_port_register(port); 2147 if (retval != 0) { 2148 ctl_free_opts(&port->options); 2149 cfiscsi_target_release(ct); 2150 free(port->port_devid, M_CFISCSI); 2151 free(port->target_devid, M_CFISCSI); 2152 req->status = CTL_LUN_ERROR; 2153 snprintf(req->error_str, sizeof(req->error_str), 2154 "ctl_port_register() failed with error %d", retval); 2155 return; 2156 } 2157done: 2158 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2159 req->status = CTL_LUN_OK; 2160 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2161 sizeof(port->targ_port)); //XXX 2162} 2163 2164static void 2165cfiscsi_ioctl_port_remove(struct ctl_req *req) 2166{ 2167 struct cfiscsi_target *ct; 2168 const char *target, *tags; 2169 ctl_options_t opts; 2170 uint16_t tag; 2171 2172 ctl_init_opts(&opts, req->num_args, req->kern_args); 2173 target = ctl_get_opt(&opts, "cfiscsi_target"); 2174 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2175 if (target == NULL || tags == NULL) { 2176 ctl_free_opts(&opts); 2177 req->status = CTL_LUN_ERROR; 2178 snprintf(req->error_str, sizeof(req->error_str), 2179 "Missing required argument"); 2180 return; 2181 } 2182 tag = strtol(tags, (char **)NULL, 10); 2183 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2184 if (ct == NULL) { 2185 ctl_free_opts(&opts); 2186 req->status = CTL_LUN_ERROR; 2187 snprintf(req->error_str, sizeof(req->error_str), 2188 "can't find target \"%s\"", target); 2189 return; 2190 } 2191 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2192 ctl_free_opts(&opts); 2193 req->status = CTL_LUN_ERROR; 2194 snprintf(req->error_str, sizeof(req->error_str), 2195 "target \"%s\" is already dying", target); 2196 return; 2197 } 2198 ctl_free_opts(&opts); 2199 2200 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2201 ctl_port_offline(&ct->ct_port); 2202 cfiscsi_target_release(ct); 2203 cfiscsi_target_release(ct); 2204 req->status = CTL_LUN_OK; 2205} 2206 2207static int 2208cfiscsi_ioctl(struct cdev *dev, 2209 u_long cmd, caddr_t addr, int flag, struct thread *td) 2210{ 2211 struct ctl_iscsi *ci; 2212 struct ctl_req *req; 2213 2214 if (cmd == CTL_PORT_REQ) { 2215 req = (struct ctl_req *)addr; 2216 switch (req->reqtype) { 2217 case CTL_REQ_CREATE: 2218 cfiscsi_ioctl_port_create(req); 2219 break; 2220 case CTL_REQ_REMOVE: 2221 cfiscsi_ioctl_port_remove(req); 2222 break; 2223 default: 2224 req->status = CTL_LUN_ERROR; 2225 snprintf(req->error_str, sizeof(req->error_str), 2226 "Unsupported request type %d", req->reqtype); 2227 } 2228 return (0); 2229 } 2230 2231 if (cmd != CTL_ISCSI) 2232 return (ENOTTY); 2233 2234 ci = (struct ctl_iscsi *)addr; 2235 switch (ci->type) { 2236 case CTL_ISCSI_HANDOFF: 2237 cfiscsi_ioctl_handoff(ci); 2238 break; 2239 case CTL_ISCSI_LIST: 2240 cfiscsi_ioctl_list(ci); 2241 break; 2242 case CTL_ISCSI_LOGOUT: 2243 cfiscsi_ioctl_logout(ci); 2244 break; 2245 case CTL_ISCSI_TERMINATE: 2246 cfiscsi_ioctl_terminate(ci); 2247 break; 2248 case CTL_ISCSI_LIMITS: 2249 cfiscsi_ioctl_limits(ci); 2250 break; 2251#ifdef ICL_KERNEL_PROXY 2252 case CTL_ISCSI_LISTEN: 2253 cfiscsi_ioctl_listen(ci); 2254 break; 2255 case CTL_ISCSI_ACCEPT: 2256 cfiscsi_ioctl_accept(ci); 2257 break; 2258 case CTL_ISCSI_SEND: 2259 cfiscsi_ioctl_send(ci); 2260 break; 2261 case CTL_ISCSI_RECEIVE: 2262 cfiscsi_ioctl_receive(ci); 2263 break; 2264#else 2265 case CTL_ISCSI_LISTEN: 2266 case CTL_ISCSI_ACCEPT: 2267 case CTL_ISCSI_SEND: 2268 case CTL_ISCSI_RECEIVE: 2269 ci->status = CTL_ISCSI_ERROR; 2270 snprintf(ci->error_str, sizeof(ci->error_str), 2271 "%s: CTL compiled without ICL_KERNEL_PROXY", 2272 __func__); 2273 break; 2274#endif /* !ICL_KERNEL_PROXY */ 2275 default: 2276 ci->status = CTL_ISCSI_ERROR; 2277 snprintf(ci->error_str, sizeof(ci->error_str), 2278 "%s: invalid iSCSI request type %d", __func__, ci->type); 2279 break; 2280 } 2281 2282 return (0); 2283} 2284 2285static void 2286cfiscsi_target_hold(struct cfiscsi_target *ct) 2287{ 2288 2289 refcount_acquire(&ct->ct_refcount); 2290} 2291 2292static void 2293cfiscsi_target_release(struct cfiscsi_target *ct) 2294{ 2295 struct cfiscsi_softc *softc; 2296 2297 softc = ct->ct_softc; 2298 mtx_lock(&softc->lock); 2299 if (refcount_release(&ct->ct_refcount)) { 2300 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2301 mtx_unlock(&softc->lock); 2302 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2303 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2304 if (ctl_port_deregister(&ct->ct_port) != 0) 2305 printf("%s: ctl_port_deregister() failed\n", 2306 __func__); 2307 } 2308 free(ct, M_CFISCSI); 2309 2310 return; 2311 } 2312 mtx_unlock(&softc->lock); 2313} 2314 2315static struct cfiscsi_target * 2316cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2317{ 2318 struct cfiscsi_target *ct; 2319 2320 mtx_lock(&softc->lock); 2321 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2322 if (ct->ct_tag != tag || 2323 strcmp(name, ct->ct_name) != 0 || 2324 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2325 continue; 2326 cfiscsi_target_hold(ct); 2327 mtx_unlock(&softc->lock); 2328 return (ct); 2329 } 2330 mtx_unlock(&softc->lock); 2331 2332 return (NULL); 2333} 2334 2335static struct cfiscsi_target * 2336cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2337 const char *alias, uint16_t tag) 2338{ 2339 struct cfiscsi_target *ct, *newct; 2340 2341 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2342 return (NULL); 2343 2344 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2345 2346 mtx_lock(&softc->lock); 2347 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2348 if (ct->ct_tag != tag || 2349 strcmp(name, ct->ct_name) != 0 || 2350 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2351 continue; 2352 cfiscsi_target_hold(ct); 2353 mtx_unlock(&softc->lock); 2354 free(newct, M_CFISCSI); 2355 return (ct); 2356 } 2357 2358 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2359 if (alias != NULL) 2360 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2361 newct->ct_tag = tag; 2362 refcount_init(&newct->ct_refcount, 1); 2363 newct->ct_softc = softc; 2364 if (TAILQ_EMPTY(&softc->targets)) 2365 softc->last_target_id = 0; 2366 newct->ct_target_id = ++softc->last_target_id; 2367 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2368 mtx_unlock(&softc->lock); 2369 2370 return (newct); 2371} 2372 2373static int 2374cfiscsi_lun_enable(void *arg, int lun_id) 2375{ 2376 2377 return (0); 2378} 2379 2380static int 2381cfiscsi_lun_disable(void *arg, int lun_id) 2382{ 2383 2384 return (0); 2385} 2386 2387static void 2388cfiscsi_datamove_in(union ctl_io *io) 2389{ 2390 struct cfiscsi_session *cs; 2391 struct icl_pdu *request, *response; 2392 const struct iscsi_bhs_scsi_command *bhssc; 2393 struct iscsi_bhs_data_in *bhsdi; 2394 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2395 size_t len, expected_len, sg_len, buffer_offset; 2396 const char *sg_addr; 2397 int ctl_sg_count, error, i; 2398 2399 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2400 cs = PDU_SESSION(request); 2401 2402 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2403 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2404 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2405 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2406 2407 if (io->scsiio.kern_sg_entries > 0) { 2408 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2409 ctl_sg_count = io->scsiio.kern_sg_entries; 2410 } else { 2411 ctl_sglist = &ctl_sg_entry; 2412 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2413 ctl_sglist->len = io->scsiio.kern_data_len; 2414 ctl_sg_count = 1; 2415 } 2416 2417 /* 2418 * This is the total amount of data to be transferred within the current 2419 * SCSI command. We need to record it so that we can properly report 2420 * underflow/underflow. 2421 */ 2422 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2423 2424 /* 2425 * This is the offset within the current SCSI command; for the first 2426 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2427 * it will be the sum of lengths of previous ones. 2428 */ 2429 buffer_offset = io->scsiio.kern_rel_offset; 2430 2431 /* 2432 * This is the transfer length expected by the initiator. In theory, 2433 * it could be different from the correct amount of data from the SCSI 2434 * point of view, even if that doesn't make any sense. 2435 */ 2436 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2437#if 0 2438 if (expected_len != io->scsiio.kern_total_len) { 2439 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2440 "actual length %zd", expected_len, 2441 (size_t)io->scsiio.kern_total_len); 2442 } 2443#endif 2444 2445 if (buffer_offset >= expected_len) { 2446#if 0 2447 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2448 "already sent the expected len", buffer_offset); 2449#endif 2450 io->scsiio.be_move_done(io); 2451 return; 2452 } 2453 2454 i = 0; 2455 sg_addr = NULL; 2456 sg_len = 0; 2457 response = NULL; 2458 bhsdi = NULL; 2459 for (;;) { 2460 if (response == NULL) { 2461 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2462 if (response == NULL) { 2463 CFISCSI_SESSION_WARN(cs, "failed to " 2464 "allocate memory; dropping connection"); 2465 ctl_set_busy(&io->scsiio); 2466 io->scsiio.be_move_done(io); 2467 cfiscsi_session_terminate(cs); 2468 return; 2469 } 2470 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2471 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2472 bhsdi->bhsdi_initiator_task_tag = 2473 bhssc->bhssc_initiator_task_tag; 2474 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2475 PDU_EXPDATASN(request)++; 2476 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2477 } 2478 2479 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2480 if (sg_len == 0) { 2481 sg_addr = ctl_sglist[i].addr; 2482 sg_len = ctl_sglist[i].len; 2483 KASSERT(sg_len > 0, ("sg_len <= 0")); 2484 } 2485 2486 len = sg_len; 2487 2488 /* 2489 * Truncate to maximum data segment length. 2490 */ 2491 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2492 ("ip_data_len %zd >= max_data_segment_length %zd", 2493 response->ip_data_len, cs->cs_max_data_segment_length)); 2494 if (response->ip_data_len + len > 2495 cs->cs_max_data_segment_length) { 2496 len = cs->cs_max_data_segment_length - 2497 response->ip_data_len; 2498 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2499 len, sg_len)); 2500 } 2501 2502 /* 2503 * Truncate to expected data transfer length. 2504 */ 2505 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2506 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2507 buffer_offset, response->ip_data_len, expected_len)); 2508 if (buffer_offset + response->ip_data_len + len > expected_len) { 2509 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2510 "to expected data transfer length %zd", 2511 buffer_offset + response->ip_data_len + len, expected_len); 2512 len = expected_len - (buffer_offset + response->ip_data_len); 2513 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2514 len, sg_len)); 2515 } 2516 2517 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2518 if (error != 0) { 2519 CFISCSI_SESSION_WARN(cs, "failed to " 2520 "allocate memory; dropping connection"); 2521 icl_pdu_free(response); 2522 ctl_set_busy(&io->scsiio); 2523 io->scsiio.be_move_done(io); 2524 cfiscsi_session_terminate(cs); 2525 return; 2526 } 2527 sg_addr += len; 2528 sg_len -= len; 2529 2530 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2531 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2532 buffer_offset, response->ip_data_len, expected_len)); 2533 if (buffer_offset + response->ip_data_len == expected_len) { 2534 /* 2535 * Already have the amount of data the initiator wanted. 2536 */ 2537 break; 2538 } 2539 2540 if (sg_len == 0) { 2541 /* 2542 * End of scatter-gather segment; 2543 * proceed to the next one... 2544 */ 2545 if (i == ctl_sg_count - 1) { 2546 /* 2547 * ... unless this was the last one. 2548 */ 2549 break; 2550 } 2551 i++; 2552 } 2553 2554 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2555 /* 2556 * Can't stuff more data into the current PDU; 2557 * queue it. Note that's not enough to check 2558 * for kern_data_resid == 0 instead; there 2559 * may be several Data-In PDUs for the final 2560 * call to cfiscsi_datamove(), and we want 2561 * to set the F flag only on the last of them. 2562 */ 2563 buffer_offset += response->ip_data_len; 2564 if (buffer_offset == io->scsiio.kern_total_len || 2565 buffer_offset == expected_len) { 2566 buffer_offset -= response->ip_data_len; 2567 break; 2568 } 2569 cfiscsi_pdu_queue(response); 2570 response = NULL; 2571 bhsdi = NULL; 2572 } 2573 } 2574 if (response != NULL) { 2575 buffer_offset += response->ip_data_len; 2576 if (buffer_offset == io->scsiio.kern_total_len || 2577 buffer_offset == expected_len) { 2578 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2579 if (io->io_hdr.status == CTL_SUCCESS) { 2580 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2581 if (PDU_TOTAL_TRANSFER_LEN(request) < 2582 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2583 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2584 bhsdi->bhsdi_residual_count = 2585 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2586 PDU_TOTAL_TRANSFER_LEN(request)); 2587 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2588 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2589 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2590 bhsdi->bhsdi_residual_count = 2591 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2592 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2593 } 2594 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2595 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2596 } 2597 } 2598 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2599 cfiscsi_pdu_queue(response); 2600 } 2601 2602 io->scsiio.be_move_done(io); 2603} 2604 2605static void 2606cfiscsi_datamove_out(union ctl_io *io) 2607{ 2608 struct cfiscsi_session *cs; 2609 struct icl_pdu *request, *response; 2610 const struct iscsi_bhs_scsi_command *bhssc; 2611 struct iscsi_bhs_r2t *bhsr2t; 2612 struct cfiscsi_data_wait *cdw; 2613 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2614 uint32_t expected_len, r2t_off, r2t_len; 2615 uint32_t target_transfer_tag; 2616 bool done; 2617 2618 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2619 cs = PDU_SESSION(request); 2620 2621 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2622 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2623 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2624 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2625 2626 /* 2627 * We need to record it so that we can properly report 2628 * underflow/underflow. 2629 */ 2630 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2631 2632 /* 2633 * Report write underflow as error since CTL and backends don't 2634 * really support it, and SCSI does not tell how to do it right. 2635 */ 2636 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2637 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2638 expected_len) { 2639 io->scsiio.io_hdr.port_status = 43; 2640 io->scsiio.be_move_done(io); 2641 return; 2642 } 2643 2644 target_transfer_tag = 2645 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2646 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2647 &target_transfer_tag); 2648 if (cdw == NULL) { 2649 CFISCSI_SESSION_WARN(cs, "failed to " 2650 "allocate memory; dropping connection"); 2651 ctl_set_busy(&io->scsiio); 2652 io->scsiio.be_move_done(io); 2653 cfiscsi_session_terminate(cs); 2654 return; 2655 } 2656#if 0 2657 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2658 "task tag 0x%x, target transfer tag 0x%x", 2659 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2660#endif 2661 2662 cdw->cdw_ctl_io = io; 2663 cdw->cdw_target_transfer_tag = target_transfer_tag; 2664 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2665 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2666 cdw->cdw_datasn = 0; 2667 2668 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2669 if (io->scsiio.kern_sg_entries > 0) { 2670 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2671 } else { 2672 ctl_sglist = &ctl_sg_entry; 2673 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2674 ctl_sglist->len = io->scsiio.kern_data_len; 2675 } 2676 cdw->cdw_sg_index = 0; 2677 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2678 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2679 r2t_off = io->scsiio.ext_data_filled; 2680 while (r2t_off > 0) { 2681 if (r2t_off >= cdw->cdw_sg_len) { 2682 r2t_off -= cdw->cdw_sg_len; 2683 cdw->cdw_sg_index++; 2684 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2685 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2686 continue; 2687 } 2688 cdw->cdw_sg_addr += r2t_off; 2689 cdw->cdw_sg_len -= r2t_off; 2690 r2t_off = 0; 2691 } 2692 2693 if (cs->cs_immediate_data && 2694 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2695 icl_pdu_data_segment_length(request)) { 2696 done = cfiscsi_handle_data_segment(request, cdw); 2697 if (done) { 2698 cfiscsi_data_wait_free(cs, cdw); 2699 io->scsiio.be_move_done(io); 2700 return; 2701 } 2702 } 2703 2704 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2705 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2706 cs->cs_max_burst_length); 2707 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2708 2709 CFISCSI_SESSION_LOCK(cs); 2710 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2711 CFISCSI_SESSION_UNLOCK(cs); 2712 2713 /* 2714 * XXX: We should limit the number of outstanding R2T PDUs 2715 * per task to MaxOutstandingR2T. 2716 */ 2717 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2718 if (response == NULL) { 2719 CFISCSI_SESSION_WARN(cs, "failed to " 2720 "allocate memory; dropping connection"); 2721 ctl_set_busy(&io->scsiio); 2722 io->scsiio.be_move_done(io); 2723 cfiscsi_session_terminate(cs); 2724 return; 2725 } 2726 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2727 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2728 bhsr2t->bhsr2t_flags = 0x80; 2729 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2730 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2731 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2732 /* 2733 * XXX: Here we assume that cfiscsi_datamove() won't ever 2734 * be running concurrently on several CPUs for a given 2735 * command. 2736 */ 2737 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2738 PDU_R2TSN(request)++; 2739 /* 2740 * This is the offset within the current SCSI command; 2741 * i.e. for the first call of datamove(), it will be 0, 2742 * and for subsequent ones it will be the sum of lengths 2743 * of previous ones. 2744 * 2745 * The ext_data_filled is to account for unsolicited 2746 * (immediate) data that might have already arrived. 2747 */ 2748 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2749 /* 2750 * This is the total length (sum of S/G lengths) this call 2751 * to cfiscsi_datamove() is supposed to handle, limited by 2752 * MaxBurstLength. 2753 */ 2754 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2755 cfiscsi_pdu_queue(response); 2756} 2757 2758static void 2759cfiscsi_datamove(union ctl_io *io) 2760{ 2761 2762 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2763 cfiscsi_datamove_in(io); 2764 else { 2765 /* We hadn't received anything during this datamove yet. */ 2766 io->scsiio.ext_data_filled = 0; 2767 cfiscsi_datamove_out(io); 2768 } 2769} 2770 2771static void 2772cfiscsi_scsi_command_done(union ctl_io *io) 2773{ 2774 struct icl_pdu *request, *response; 2775 struct iscsi_bhs_scsi_command *bhssc; 2776 struct iscsi_bhs_scsi_response *bhssr; 2777#ifdef DIAGNOSTIC 2778 struct cfiscsi_data_wait *cdw; 2779#endif 2780 struct cfiscsi_session *cs; 2781 uint16_t sense_length; 2782 2783 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2784 cs = PDU_SESSION(request); 2785 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2786 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2787 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2788 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2789 2790 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2791 // bhssc->bhssc_initiator_task_tag); 2792 2793#ifdef DIAGNOSTIC 2794 CFISCSI_SESSION_LOCK(cs); 2795 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2796 KASSERT(bhssc->bhssc_initiator_task_tag != 2797 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2798 CFISCSI_SESSION_UNLOCK(cs); 2799#endif 2800 2801 /* 2802 * Do not return status for aborted commands. 2803 * There are exceptions, but none supported by CTL yet. 2804 */ 2805 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2806 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2807 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2808 ctl_free_io(io); 2809 icl_pdu_free(request); 2810 return; 2811 } 2812 2813 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2814 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2815 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2816 bhssr->bhssr_flags = 0x80; 2817 /* 2818 * XXX: We don't deal with bidirectional under/overflows; 2819 * does anything actually support those? 2820 */ 2821 if (PDU_TOTAL_TRANSFER_LEN(request) < 2822 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2823 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2824 bhssr->bhssr_residual_count = 2825 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2826 PDU_TOTAL_TRANSFER_LEN(request)); 2827 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2828 // ntohl(bhssr->bhssr_residual_count)); 2829 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2830 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2831 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2832 bhssr->bhssr_residual_count = 2833 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2834 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2835 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2836 // ntohl(bhssr->bhssr_residual_count)); 2837 } 2838 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2839 bhssr->bhssr_status = io->scsiio.scsi_status; 2840 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2841 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2842 2843 if (io->scsiio.sense_len > 0) { 2844#if 0 2845 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2846 io->scsiio.sense_len); 2847#endif 2848 sense_length = htons(io->scsiio.sense_len); 2849 icl_pdu_append_data(response, 2850 &sense_length, sizeof(sense_length), M_WAITOK); 2851 icl_pdu_append_data(response, 2852 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2853 } 2854 2855 ctl_free_io(io); 2856 icl_pdu_free(request); 2857 cfiscsi_pdu_queue(response); 2858} 2859 2860static void 2861cfiscsi_task_management_done(union ctl_io *io) 2862{ 2863 struct icl_pdu *request, *response; 2864 struct iscsi_bhs_task_management_request *bhstmr; 2865 struct iscsi_bhs_task_management_response *bhstmr2; 2866 struct cfiscsi_data_wait *cdw, *tmpcdw; 2867 struct cfiscsi_session *cs; 2868 2869 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2870 cs = PDU_SESSION(request); 2871 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2872 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2873 ISCSI_BHS_OPCODE_TASK_REQUEST, 2874 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2875 2876#if 0 2877 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2878 bhstmr->bhstmr_initiator_task_tag, 2879 bhstmr->bhstmr_referenced_task_tag); 2880#endif 2881 2882 if ((bhstmr->bhstmr_function & ~0x80) == 2883 BHSTMR_FUNCTION_ABORT_TASK) { 2884 /* 2885 * Make sure we no longer wait for Data-Out for this command. 2886 */ 2887 CFISCSI_SESSION_LOCK(cs); 2888 TAILQ_FOREACH_SAFE(cdw, 2889 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2890 if (bhstmr->bhstmr_referenced_task_tag != 2891 cdw->cdw_initiator_task_tag) 2892 continue; 2893 2894#if 0 2895 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2896 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2897#endif 2898 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2899 cdw, cdw_next); 2900 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2901 cfiscsi_data_wait_free(cs, cdw); 2902 } 2903 CFISCSI_SESSION_UNLOCK(cs); 2904 } 2905 2906 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2907 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2908 response->ip_bhs; 2909 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2910 bhstmr2->bhstmr_flags = 0x80; 2911 if (io->io_hdr.status == CTL_SUCCESS) { 2912 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2913 } else { 2914 /* 2915 * XXX: How to figure out what exactly went wrong? iSCSI spec 2916 * expects us to provide detailed error, e.g. "Task does 2917 * not exist" or "LUN does not exist". 2918 */ 2919 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2920 bhstmr2->bhstmr_response = 2921 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2922 } 2923 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2924 2925 ctl_free_io(io); 2926 icl_pdu_free(request); 2927 cfiscsi_pdu_queue(response); 2928} 2929 2930static void 2931cfiscsi_done(union ctl_io *io) 2932{ 2933 struct icl_pdu *request; 2934 struct cfiscsi_session *cs; 2935 2936 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2937 ("invalid CTL status %#x", io->io_hdr.status)); 2938 2939 if (io->io_hdr.io_type == CTL_IO_TASK && 2940 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2941 /* 2942 * Implicit task termination has just completed; nothing to do. 2943 */ 2944 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2945 cs->cs_tasks_aborted = true; 2946 refcount_release(&cs->cs_outstanding_ctl_pdus); 2947 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2948 ctl_free_io(io); 2949 return; 2950 } 2951 2952 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2953 cs = PDU_SESSION(request); 2954 refcount_release(&cs->cs_outstanding_ctl_pdus); 2955 2956 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2957 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2958 cfiscsi_scsi_command_done(io); 2959 break; 2960 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2961 cfiscsi_task_management_done(io); 2962 break; 2963 default: 2964 panic("cfiscsi_done called with wrong opcode 0x%x", 2965 request->ip_bhs->bhs_opcode); 2966 } 2967} 2968