ctl_frontend_iscsi.c revision 274940
1199458Sjilles/*- 2199458Sjilles * Copyright (c) 2012 The FreeBSD Foundation 3199458Sjilles * All rights reserved. 4199458Sjilles * 5199458Sjilles * This software was developed by Edward Tomasz Napierala under sponsorship 6199458Sjilles * from the FreeBSD Foundation. 7199458Sjilles * 8199458Sjilles * Redistribution and use in source and binary forms, with or without 9199458Sjilles * modification, are permitted provided that the following conditions 10199458Sjilles * are met: 11199458Sjilles * 1. Redistributions of source code must retain the above copyright 12199458Sjilles * notice, this list of conditions and the following disclaimer. 13199458Sjilles * 2. Redistributions in binary form must reproduce the above copyright 14199458Sjilles * notice, this list of conditions and the following disclaimer in the 15199458Sjilles * documentation and/or other materials provided with the distribution. 16199458Sjilles * 17199458Sjilles * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18199458Sjilles * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19199458Sjilles * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20199458Sjilles * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21199458Sjilles * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22199458Sjilles * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23199458Sjilles * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24199458Sjilles * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25199458Sjilles * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26199458Sjilles * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27199458Sjilles * SUCH DAMAGE. 28199458Sjilles * 29199458Sjilles * $FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 274940 2014-11-24 00:59:51Z mav $ 30199458Sjilles */ 31199458Sjilles 32199458Sjilles/* 33199458Sjilles * CTL frontend for the iSCSI protocol. 34199458Sjilles */ 35199458Sjilles 36206622Suqs#include <sys/cdefs.h> 37199458Sjilles__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 274940 2014-11-24 00:59:51Z mav $"); 38199458Sjilles 39199458Sjilles#include <sys/param.h> 40199458Sjilles#include <sys/capsicum.h> 41199458Sjilles#include <sys/condvar.h> 42199458Sjilles#include <sys/file.h> 43199458Sjilles#include <sys/kernel.h> 44199458Sjilles#include <sys/kthread.h> 45199458Sjilles#include <sys/lock.h> 46199458Sjilles#include <sys/malloc.h> 47199458Sjilles#include <sys/module.h> 48199458Sjilles#include <sys/mutex.h> 49233648Seadler#include <sys/queue.h> 50199458Sjilles#include <sys/sbuf.h> 51199458Sjilles#include <sys/sysctl.h> 52199458Sjilles#include <sys/systm.h> 53199458Sjilles#include <sys/uio.h> 54199458Sjilles#include <sys/unistd.h> 55199458Sjilles#include <vm/uma.h> 56199458Sjilles 57199458Sjilles#include <cam/scsi/scsi_all.h> 58199458Sjilles#include <cam/scsi/scsi_da.h> 59199458Sjilles#include <cam/ctl/ctl_io.h> 60199458Sjilles#include <cam/ctl/ctl.h> 61199458Sjilles#include <cam/ctl/ctl_backend.h> 62199458Sjilles#include <cam/ctl/ctl_error.h> 63199458Sjilles#include <cam/ctl/ctl_frontend.h> 64199458Sjilles#include <cam/ctl/ctl_frontend_internal.h> 65199458Sjilles#include <cam/ctl/ctl_debug.h> 66199458Sjilles#include <cam/ctl/ctl_ha.h> 67199458Sjilles#include <cam/ctl/ctl_ioctl.h> 68199458Sjilles#include <cam/ctl/ctl_private.h> 69199458Sjilles 70199458Sjilles#include <dev/iscsi/icl.h> 71199458Sjilles#include <dev/iscsi/iscsi_proto.h> 72199458Sjilles#include <cam/ctl/ctl_frontend_iscsi.h> 73199458Sjilles 74199458Sjilles#ifdef ICL_KERNEL_PROXY 75199458Sjilles#include <sys/socketvar.h> 76199458Sjilles#endif 77199458Sjilles 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 1; 88SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 89 &debug, 1, "Enable debug messages"); 90static int ping_timeout = 5; 91SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 92 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 93static int login_timeout = 60; 94SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 95 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 96static int maxcmdsn_delta = 256; 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 98 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 99 "without confirmation"); 100 101#define CFISCSI_DEBUG(X, ...) \ 102 do { \ 103 if (debug > 1) { \ 104 printf("%s: " X "\n", \ 105 __func__, ## __VA_ARGS__); \ 106 } \ 107 } while (0) 108 109#define CFISCSI_WARN(X, ...) \ 110 do { \ 111 if (debug > 0) { \ 112 printf("WARNING: %s: " X "\n", \ 113 __func__, ## __VA_ARGS__); \ 114 } \ 115 } while (0) 116 117#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 118 do { \ 119 if (debug > 1) { \ 120 printf("%s: %s (%s): " X "\n", \ 121 __func__, S->cs_initiator_addr, \ 122 S->cs_initiator_name, ## __VA_ARGS__); \ 123 } \ 124 } while (0) 125 126#define CFISCSI_SESSION_WARN(S, X, ...) \ 127 do { \ 128 if (debug > 0) { \ 129 printf("WARNING: %s (%s): " X "\n", \ 130 S->cs_initiator_addr, \ 131 S->cs_initiator_name, ## __VA_ARGS__); \ 132 } \ 133 } while (0) 134 135#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 136#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 137#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 138 139#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 140#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 141#define PDU_EXPDATASN(X) (X)->ip_prv0 142#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 143#define PDU_R2TSN(X) (X)->ip_prv2 144 145int cfiscsi_init(void); 146static void cfiscsi_online(void *arg); 147static void cfiscsi_offline(void *arg); 148static int cfiscsi_info(void *arg, struct sbuf *sb); 149static int cfiscsi_lun_enable(void *arg, 150 struct ctl_id target_id, int lun_id); 151static int cfiscsi_lun_disable(void *arg, 152 struct ctl_id target_id, int lun_id); 153static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 154static int cfiscsi_ioctl(struct cdev *dev, 155 u_long cmd, caddr_t addr, int flag, struct thread *td); 156static void cfiscsi_datamove(union ctl_io *io); 157static void cfiscsi_datamove_in(union ctl_io *io); 158static void cfiscsi_datamove_out(union ctl_io *io); 159static void cfiscsi_done(union ctl_io *io); 160static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 161static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 162static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 163static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 164static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 165static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 166static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 167static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 168 *softc, const char *name); 169static struct cfiscsi_target *cfiscsi_target_find_or_create( 170 struct cfiscsi_softc *softc, const char *name, const char *alias); 171static void cfiscsi_target_release(struct cfiscsi_target *ct); 172static void cfiscsi_session_delete(struct cfiscsi_session *cs); 173 174static struct cfiscsi_softc cfiscsi_softc; 175extern struct ctl_softc *control_softc; 176 177static struct ctl_frontend cfiscsi_frontend = 178{ 179 .name = "iscsi", 180 .init = cfiscsi_init, 181 .ioctl = cfiscsi_ioctl, 182}; 183CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 184MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 185 186static struct icl_pdu * 187cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 188{ 189 190 return (icl_pdu_new(request->ip_conn, flags)); 191} 192 193static bool 194cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 195{ 196 const struct iscsi_bhs_scsi_command *bhssc; 197 struct cfiscsi_session *cs; 198 uint32_t cmdsn, expstatsn; 199 200 cs = PDU_SESSION(request); 201 202 /* 203 * Every incoming PDU - not just NOP-Out - resets the ping timer. 204 * The purpose of the timeout is to reset the connection when it stalls; 205 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 206 * in some queue. 207 * 208 * XXX: Locking? 209 */ 210 cs->cs_timeout = 0; 211 212 /* 213 * Data-Out PDUs don't contain CmdSN. 214 */ 215 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 216 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 217 return (false); 218 219 /* 220 * We're only using fields common for all the request 221 * (initiator -> target) PDUs. 222 */ 223 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 224 cmdsn = ntohl(bhssc->bhssc_cmdsn); 225 expstatsn = ntohl(bhssc->bhssc_expstatsn); 226 227 CFISCSI_SESSION_LOCK(cs); 228#if 0 229 if (expstatsn != cs->cs_statsn) { 230 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 231 "while current StatSN is %d", expstatsn, 232 cs->cs_statsn); 233 } 234#endif 235 236 /* 237 * The target MUST silently ignore any non-immediate command outside 238 * of this range. 239 */ 240 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 241 CFISCSI_SESSION_UNLOCK(cs); 242 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 243 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 244 return (true); 245 } 246 247 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 248 cs->cs_cmdsn++; 249 250 CFISCSI_SESSION_UNLOCK(cs); 251 252 return (false); 253} 254 255static void 256cfiscsi_pdu_handle(struct icl_pdu *request) 257{ 258 struct cfiscsi_session *cs; 259 bool ignore; 260 261 cs = PDU_SESSION(request); 262 263 ignore = cfiscsi_pdu_update_cmdsn(request); 264 if (ignore) { 265 icl_pdu_free(request); 266 return; 267 } 268 269 /* 270 * Handle the PDU; this includes e.g. receiving the remaining 271 * part of PDU and submitting the SCSI command to CTL 272 * or queueing a reply. The handling routine is responsible 273 * for freeing the PDU when it's no longer needed. 274 */ 275 switch (request->ip_bhs->bhs_opcode & 276 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 277 case ISCSI_BHS_OPCODE_NOP_OUT: 278 cfiscsi_pdu_handle_nop_out(request); 279 break; 280 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 281 cfiscsi_pdu_handle_scsi_command(request); 282 break; 283 case ISCSI_BHS_OPCODE_TASK_REQUEST: 284 cfiscsi_pdu_handle_task_request(request); 285 break; 286 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 287 cfiscsi_pdu_handle_data_out(request); 288 break; 289 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 290 cfiscsi_pdu_handle_logout_request(request); 291 break; 292 default: 293 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 294 "opcode 0x%x; dropping connection", 295 request->ip_bhs->bhs_opcode); 296 icl_pdu_free(request); 297 cfiscsi_session_terminate(cs); 298 } 299 300} 301 302static void 303cfiscsi_receive_callback(struct icl_pdu *request) 304{ 305 struct cfiscsi_session *cs; 306 307 cs = PDU_SESSION(request); 308 309#ifdef ICL_KERNEL_PROXY 310 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 311 if (cs->cs_login_pdu == NULL) 312 cs->cs_login_pdu = request; 313 else 314 icl_pdu_free(request); 315 cv_signal(&cs->cs_login_cv); 316 return; 317 } 318#endif 319 320 cfiscsi_pdu_handle(request); 321} 322 323static void 324cfiscsi_error_callback(struct icl_conn *ic) 325{ 326 struct cfiscsi_session *cs; 327 328 cs = CONN_SESSION(ic); 329 330 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 331 cfiscsi_session_terminate(cs); 332} 333 334static int 335cfiscsi_pdu_prepare(struct icl_pdu *response) 336{ 337 struct cfiscsi_session *cs; 338 struct iscsi_bhs_scsi_response *bhssr; 339 bool advance_statsn = true; 340 341 cs = PDU_SESSION(response); 342 343 CFISCSI_SESSION_LOCK_ASSERT(cs); 344 345 /* 346 * We're only using fields common for all the response 347 * (target -> initiator) PDUs. 348 */ 349 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 350 351 /* 352 * 10.8.3: "The StatSN for this connection is not advanced 353 * after this PDU is sent." 354 */ 355 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 356 advance_statsn = false; 357 358 /* 359 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 360 * StatSN for the connection is not advanced after this PDU is sent." 361 */ 362 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 363 bhssr->bhssr_initiator_task_tag == 0xffffffff) 364 advance_statsn = false; 365 366 /* 367 * See the comment below - StatSN is not meaningful and must 368 * not be advanced. 369 */ 370 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 371 advance_statsn = false; 372 373 /* 374 * 10.7.3: "The fields StatSN, Status, and Residual Count 375 * only have meaningful content if the S bit is set to 1." 376 */ 377 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 378 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 379 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 380 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 381 382 if (advance_statsn) 383 cs->cs_statsn++; 384 385 return (0); 386} 387 388static void 389cfiscsi_pdu_queue(struct icl_pdu *response) 390{ 391 struct cfiscsi_session *cs; 392 393 cs = PDU_SESSION(response); 394 395 CFISCSI_SESSION_LOCK(cs); 396 cfiscsi_pdu_prepare(response); 397 icl_pdu_queue(response); 398 CFISCSI_SESSION_UNLOCK(cs); 399} 400 401static uint32_t 402cfiscsi_decode_lun(uint64_t encoded) 403{ 404 uint8_t lun[8]; 405 uint32_t result; 406 407 /* 408 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 409 * but is in fact an evil, multidimensional structure defined 410 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 411 */ 412 memcpy(lun, &encoded, sizeof(lun)); 413 switch (lun[0] & 0xC0) { 414 case 0x00: 415 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 416 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 417 CFISCSI_WARN("malformed LUN " 418 "(peripheral device addressing method): 0x%jx", 419 (uintmax_t)encoded); 420 result = 0xffffffff; 421 break; 422 } 423 result = lun[1]; 424 break; 425 case 0x40: 426 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 427 lun[6] != 0 || lun[7] != 0) { 428 CFISCSI_WARN("malformed LUN " 429 "(flat address space addressing method): 0x%jx", 430 (uintmax_t)encoded); 431 result = 0xffffffff; 432 break; 433 } 434 result = ((lun[0] & 0x3f) << 8) + lun[1]; 435 break; 436 case 0xC0: 437 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 438 lun[6] != 0 || lun[7] != 0) { 439 CFISCSI_WARN("malformed LUN (extended flat " 440 "address space addressing method): 0x%jx", 441 (uintmax_t)encoded); 442 result = 0xffffffff; 443 break; 444 } 445 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 446 default: 447 CFISCSI_WARN("unsupported LUN format 0x%jx", 448 (uintmax_t)encoded); 449 result = 0xffffffff; 450 break; 451 } 452 453 return (result); 454} 455 456static void 457cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 458{ 459 struct cfiscsi_session *cs; 460 struct iscsi_bhs_nop_out *bhsno; 461 struct iscsi_bhs_nop_in *bhsni; 462 struct icl_pdu *response; 463 void *data = NULL; 464 size_t datasize; 465 int error; 466 467 cs = PDU_SESSION(request); 468 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 469 470 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 471 /* 472 * Nothing to do, iscsi_pdu_update_statsn() already 473 * zeroed the timeout. 474 */ 475 icl_pdu_free(request); 476 return; 477 } 478 479 datasize = icl_pdu_data_segment_length(request); 480 if (datasize > 0) { 481 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 482 if (data == NULL) { 483 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 484 "dropping connection"); 485 icl_pdu_free(request); 486 cfiscsi_session_terminate(cs); 487 return; 488 } 489 icl_pdu_get_data(request, 0, data, datasize); 490 } 491 492 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 493 if (response == NULL) { 494 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 495 "droppping connection"); 496 free(data, M_CFISCSI); 497 icl_pdu_free(request); 498 cfiscsi_session_terminate(cs); 499 return; 500 } 501 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 502 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 503 bhsni->bhsni_flags = 0x80; 504 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 505 bhsni->bhsni_target_transfer_tag = 0xffffffff; 506 if (datasize > 0) { 507 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 508 if (error != 0) { 509 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 510 "dropping connection"); 511 free(data, M_CFISCSI); 512 icl_pdu_free(request); 513 icl_pdu_free(response); 514 cfiscsi_session_terminate(cs); 515 return; 516 } 517 free(data, M_CFISCSI); 518 } 519 520 icl_pdu_free(request); 521 cfiscsi_pdu_queue(response); 522} 523 524static void 525cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 526{ 527 struct iscsi_bhs_scsi_command *bhssc; 528 struct cfiscsi_session *cs; 529 union ctl_io *io; 530 int error; 531 532 cs = PDU_SESSION(request); 533 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 534 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 535 // bhssc->bhssc_initiator_task_tag); 536 537 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 538 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 539 "ImmediateData=No; dropping connection"); 540 icl_pdu_free(request); 541 cfiscsi_session_terminate(cs); 542 return; 543 } 544 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 545 if (io == NULL) { 546 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 547 "dropping connection"); 548 icl_pdu_free(request); 549 cfiscsi_session_terminate(cs); 550 return; 551 } 552 ctl_zero_io(io); 553 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 554 io->io_hdr.io_type = CTL_IO_SCSI; 555 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 556 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 557 io->io_hdr.nexus.targ_target.id = 0; 558 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 559 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 560 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 561 case BHSSC_FLAGS_ATTR_UNTAGGED: 562 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 563 break; 564 case BHSSC_FLAGS_ATTR_SIMPLE: 565 io->scsiio.tag_type = CTL_TAG_SIMPLE; 566 break; 567 case BHSSC_FLAGS_ATTR_ORDERED: 568 io->scsiio.tag_type = CTL_TAG_ORDERED; 569 break; 570 case BHSSC_FLAGS_ATTR_HOQ: 571 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 572 break; 573 case BHSSC_FLAGS_ATTR_ACA: 574 io->scsiio.tag_type = CTL_TAG_ACA; 575 break; 576 default: 577 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 578 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 579 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 580 break; 581 } 582 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 583 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 584 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 585 error = ctl_queue(io); 586 if (error != CTL_RETVAL_COMPLETE) { 587 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 588 "dropping connection", error); 589 ctl_free_io(io); 590 refcount_release(&cs->cs_outstanding_ctl_pdus); 591 icl_pdu_free(request); 592 cfiscsi_session_terminate(cs); 593 } 594} 595 596static void 597cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 598{ 599 struct iscsi_bhs_task_management_request *bhstmr; 600 struct iscsi_bhs_task_management_response *bhstmr2; 601 struct icl_pdu *response; 602 struct cfiscsi_session *cs; 603 union ctl_io *io; 604 int error; 605 606 cs = PDU_SESSION(request); 607 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 608 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 609 if (io == NULL) { 610 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 611 "dropping connection"); 612 icl_pdu_free(request); 613 cfiscsi_session_terminate(cs); 614 return; 615 } 616 ctl_zero_io(io); 617 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 618 io->io_hdr.io_type = CTL_IO_TASK; 619 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 620 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 621 io->io_hdr.nexus.targ_target.id = 0; 622 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 623 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 624 625 switch (bhstmr->bhstmr_function & ~0x80) { 626 case BHSTMR_FUNCTION_ABORT_TASK: 627#if 0 628 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 629#endif 630 io->taskio.task_action = CTL_TASK_ABORT_TASK; 631 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 632 break; 633 case BHSTMR_FUNCTION_ABORT_TASK_SET: 634#if 0 635 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 636#endif 637 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 638 break; 639 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 640#if 0 641 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 642#endif 643 io->taskio.task_action = CTL_TASK_LUN_RESET; 644 break; 645 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 646#if 0 647 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 648#endif 649 io->taskio.task_action = CTL_TASK_TARGET_RESET; 650 break; 651 default: 652 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 653 bhstmr->bhstmr_function & ~0x80); 654 ctl_free_io(io); 655 656 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 657 if (response == NULL) { 658 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 659 "dropping connection"); 660 icl_pdu_free(request); 661 cfiscsi_session_terminate(cs); 662 return; 663 } 664 bhstmr2 = (struct iscsi_bhs_task_management_response *) 665 response->ip_bhs; 666 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 667 bhstmr2->bhstmr_flags = 0x80; 668 bhstmr2->bhstmr_response = 669 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 670 bhstmr2->bhstmr_initiator_task_tag = 671 bhstmr->bhstmr_initiator_task_tag; 672 icl_pdu_free(request); 673 cfiscsi_pdu_queue(response); 674 return; 675 } 676 677 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 678 error = ctl_queue(io); 679 if (error != CTL_RETVAL_COMPLETE) { 680 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 681 "dropping connection", error); 682 ctl_free_io(io); 683 refcount_release(&cs->cs_outstanding_ctl_pdus); 684 icl_pdu_free(request); 685 cfiscsi_session_terminate(cs); 686 } 687} 688 689static bool 690cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 691{ 692 struct iscsi_bhs_data_out *bhsdo; 693 struct cfiscsi_session *cs; 694 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 695 size_t copy_len, len, off, buffer_offset; 696 int ctl_sg_count; 697 union ctl_io *io; 698 699 cs = PDU_SESSION(request); 700 701 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 702 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 703 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 704 ISCSI_BHS_OPCODE_SCSI_COMMAND, 705 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 706 707 /* 708 * We're only using fields common for Data-Out and SCSI Command PDUs. 709 */ 710 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 711 712 io = cdw->cdw_ctl_io; 713 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 714 ("CTL_FLAG_DATA_IN")); 715 716#if 0 717 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 718 request->ip_data_len, io->scsiio.kern_total_len); 719#endif 720 721 if (io->scsiio.kern_sg_entries > 0) { 722 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 723 ctl_sg_count = io->scsiio.kern_sg_entries; 724 } else { 725 ctl_sglist = &ctl_sg_entry; 726 ctl_sglist->addr = io->scsiio.kern_data_ptr; 727 ctl_sglist->len = io->scsiio.kern_data_len; 728 ctl_sg_count = 1; 729 } 730 731 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 732 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 733 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 734 else 735 buffer_offset = 0; 736 len = icl_pdu_data_segment_length(request); 737 738 /* 739 * Make sure the offset, as sent by the initiator, matches the offset 740 * we're supposed to be at in the scatter-gather list. 741 */ 742 if (buffer_offset > 743 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 744 buffer_offset + len <= 745 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 746 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 747 "expected %zd; dropping connection", buffer_offset, 748 (size_t)io->scsiio.kern_rel_offset + 749 (size_t)io->scsiio.ext_data_filled); 750 ctl_set_data_phase_error(&io->scsiio); 751 cfiscsi_session_terminate(cs); 752 return (true); 753 } 754 755 /* 756 * This is the offset within the PDU data segment, as opposed 757 * to buffer_offset, which is the offset within the task (SCSI 758 * command). 759 */ 760 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 761 buffer_offset; 762 763 /* 764 * Iterate over the scatter/gather segments, filling them with data 765 * from the PDU data segment. Note that this can get called multiple 766 * times for one SCSI command; the cdw structure holds state for the 767 * scatter/gather list. 768 */ 769 for (;;) { 770 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 771 ("cdw->cdw_sg_index >= ctl_sg_count")); 772 if (cdw->cdw_sg_len == 0) { 773 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 774 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 775 } 776 KASSERT(off <= len, ("len > off")); 777 copy_len = len - off; 778 if (copy_len > cdw->cdw_sg_len) 779 copy_len = cdw->cdw_sg_len; 780 781 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 782 cdw->cdw_sg_addr += copy_len; 783 cdw->cdw_sg_len -= copy_len; 784 off += copy_len; 785 io->scsiio.ext_data_filled += copy_len; 786 787 if (cdw->cdw_sg_len == 0) { 788 /* 789 * End of current segment. 790 */ 791 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 792 /* 793 * Last segment in scatter/gather list. 794 */ 795 break; 796 } 797 cdw->cdw_sg_index++; 798 } 799 800 if (off == len) { 801 /* 802 * End of PDU payload. 803 */ 804 break; 805 } 806 } 807 808 if (len > off) { 809 /* 810 * In case of unsolicited data, it's possible that the buffer 811 * provided by CTL is smaller than negotiated FirstBurstLength. 812 * Just ignore the superfluous data; will ask for them with R2T 813 * on next call to cfiscsi_datamove(). 814 * 815 * This obviously can only happen with SCSI Command PDU. 816 */ 817 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 818 ISCSI_BHS_OPCODE_SCSI_COMMAND) 819 return (true); 820 821 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 822 "expected %zd; dropping connection", 823 icl_pdu_data_segment_length(request), off); 824 ctl_set_data_phase_error(&io->scsiio); 825 cfiscsi_session_terminate(cs); 826 return (true); 827 } 828 829 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 830 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 831 CFISCSI_SESSION_WARN(cs, "got the final packet without " 832 "the F flag; flags = 0x%x; dropping connection", 833 bhsdo->bhsdo_flags); 834 ctl_set_data_phase_error(&io->scsiio); 835 cfiscsi_session_terminate(cs); 836 return (true); 837 } 838 839 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 840 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 841 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 842 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 843 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 844 "transmitted size was %zd bytes instead of %d; " 845 "dropping connection", 846 (size_t)io->scsiio.ext_data_filled, 847 cdw->cdw_r2t_end); 848 ctl_set_data_phase_error(&io->scsiio); 849 cfiscsi_session_terminate(cs); 850 return (true); 851 } else { 852 /* 853 * For SCSI Command PDU, this just means we need to 854 * solicit more data by sending R2T. 855 */ 856 return (false); 857 } 858 } 859 860 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 861#if 0 862 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 863 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 864#endif 865 866 return (true); 867 } 868 869 return (false); 870} 871 872static void 873cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 874{ 875 struct iscsi_bhs_data_out *bhsdo; 876 struct cfiscsi_session *cs; 877 struct cfiscsi_data_wait *cdw = NULL; 878 union ctl_io *io; 879 bool done; 880 881 cs = PDU_SESSION(request); 882 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 883 884 CFISCSI_SESSION_LOCK(cs); 885 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 886#if 0 887 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 888 "ttt 0x%x, itt 0x%x", 889 bhsdo->bhsdo_target_transfer_tag, 890 bhsdo->bhsdo_initiator_task_tag, 891 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 892#endif 893 if (bhsdo->bhsdo_target_transfer_tag == 894 cdw->cdw_target_transfer_tag) 895 break; 896 } 897 CFISCSI_SESSION_UNLOCK(cs); 898 if (cdw == NULL) { 899 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 900 "0x%x, not found; dropping connection", 901 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 902 icl_pdu_free(request); 903 cfiscsi_session_terminate(cs); 904 return; 905 } 906 907 io = cdw->cdw_ctl_io; 908 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 909 ("CTL_FLAG_DATA_IN")); 910 911 done = cfiscsi_handle_data_segment(request, cdw); 912 if (done) { 913 CFISCSI_SESSION_LOCK(cs); 914 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 915 CFISCSI_SESSION_UNLOCK(cs); 916 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 917 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 918 uma_zfree(cfiscsi_data_wait_zone, cdw); 919 if (done) 920 io->scsiio.be_move_done(io); 921 else 922 cfiscsi_datamove_out(io); 923 } 924 925 icl_pdu_free(request); 926} 927 928static void 929cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 930{ 931 struct iscsi_bhs_logout_request *bhslr; 932 struct iscsi_bhs_logout_response *bhslr2; 933 struct icl_pdu *response; 934 struct cfiscsi_session *cs; 935 936 cs = PDU_SESSION(request); 937 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 938 switch (bhslr->bhslr_reason & 0x7f) { 939 case BHSLR_REASON_CLOSE_SESSION: 940 case BHSLR_REASON_CLOSE_CONNECTION: 941 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 942 if (response == NULL) { 943 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 944 icl_pdu_free(request); 945 cfiscsi_session_terminate(cs); 946 return; 947 } 948 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 949 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 950 bhslr2->bhslr_flags = 0x80; 951 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 952 bhslr2->bhslr_initiator_task_tag = 953 bhslr->bhslr_initiator_task_tag; 954 icl_pdu_free(request); 955 cfiscsi_pdu_queue(response); 956 cfiscsi_session_terminate(cs); 957 break; 958 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 959 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 960 if (response == NULL) { 961 CFISCSI_SESSION_WARN(cs, 962 "failed to allocate memory; dropping connection"); 963 icl_pdu_free(request); 964 cfiscsi_session_terminate(cs); 965 return; 966 } 967 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 968 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 969 bhslr2->bhslr_flags = 0x80; 970 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 971 bhslr2->bhslr_initiator_task_tag = 972 bhslr->bhslr_initiator_task_tag; 973 icl_pdu_free(request); 974 cfiscsi_pdu_queue(response); 975 break; 976 default: 977 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 978 bhslr->bhslr_reason); 979 icl_pdu_free(request); 980 cfiscsi_session_terminate(cs); 981 break; 982 } 983} 984 985static void 986cfiscsi_callout(void *context) 987{ 988 struct icl_pdu *cp; 989 struct iscsi_bhs_nop_in *bhsni; 990 struct cfiscsi_session *cs; 991 992 cs = context; 993 994 if (cs->cs_terminating) 995 return; 996 997 callout_schedule(&cs->cs_callout, 1 * hz); 998 999 atomic_add_int(&cs->cs_timeout, 1); 1000 1001#ifdef ICL_KERNEL_PROXY 1002 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1003 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1004 CFISCSI_SESSION_WARN(cs, "login timed out after " 1005 "%d seconds; dropping connection", cs->cs_timeout); 1006 cfiscsi_session_terminate(cs); 1007 } 1008 return; 1009 } 1010#endif 1011 1012 if (ping_timeout <= 0) { 1013 /* 1014 * Pings are disabled. Don't send NOP-In in this case; 1015 * user might have disabled pings to work around problems 1016 * with certain initiators that can't properly handle 1017 * NOP-In, such as iPXE. Reset the timeout, to avoid 1018 * triggering reconnection, should the user decide to 1019 * reenable them. 1020 */ 1021 cs->cs_timeout = 0; 1022 return; 1023 } 1024 1025 if (cs->cs_timeout >= ping_timeout) { 1026 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1027 "dropping connection", ping_timeout); 1028 cfiscsi_session_terminate(cs); 1029 return; 1030 } 1031 1032 /* 1033 * If the ping was reset less than one second ago - which means 1034 * that we've received some PDU during the last second - assume 1035 * the traffic flows correctly and don't bother sending a NOP-Out. 1036 * 1037 * (It's 2 - one for one second, and one for incrementing is_timeout 1038 * earlier in this routine.) 1039 */ 1040 if (cs->cs_timeout < 2) 1041 return; 1042 1043 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1044 if (cp == NULL) { 1045 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1046 return; 1047 } 1048 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1049 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1050 bhsni->bhsni_flags = 0x80; 1051 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1052 1053 cfiscsi_pdu_queue(cp); 1054} 1055 1056static void 1057cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1058{ 1059 struct cfiscsi_data_wait *cdw; 1060 union ctl_io *io; 1061 int error, last, wait; 1062 1063 if (cs->cs_target == NULL) 1064 return; /* No target yet, so nothing to do. */ 1065 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1066 if (io == NULL) { 1067 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1068 return; 1069 } 1070 ctl_zero_io(io); 1071 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1072 io->io_hdr.io_type = CTL_IO_TASK; 1073 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1074 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1075 io->io_hdr.nexus.targ_target.id = 0; 1076 io->io_hdr.nexus.targ_lun = 0; 1077 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1078 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1079 wait = cs->cs_outstanding_ctl_pdus; 1080 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1081 error = ctl_queue(io); 1082 if (error != CTL_RETVAL_COMPLETE) { 1083 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1084 refcount_release(&cs->cs_outstanding_ctl_pdus); 1085 ctl_free_io(io); 1086 } 1087 1088 CFISCSI_SESSION_LOCK(cs); 1089 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1090 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1091 CFISCSI_SESSION_UNLOCK(cs); 1092 /* 1093 * Set nonzero port status; this prevents backends from 1094 * assuming that the data transfer actually succeeded 1095 * and writing uninitialized data to disk. 1096 */ 1097 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1098 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1099 uma_zfree(cfiscsi_data_wait_zone, cdw); 1100 CFISCSI_SESSION_LOCK(cs); 1101 } 1102 CFISCSI_SESSION_UNLOCK(cs); 1103 1104 /* 1105 * Wait for CTL to terminate all the tasks. 1106 */ 1107 if (wait > 0) 1108 CFISCSI_SESSION_WARN(cs, 1109 "waiting for CTL to terminate %d tasks", wait); 1110 for (;;) { 1111 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1112 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1113 if (last != 0) 1114 break; 1115 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1116 0, "cfiscsi_terminate", hz / 100); 1117 } 1118 if (wait > 0) 1119 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1120} 1121 1122static void 1123cfiscsi_maintenance_thread(void *arg) 1124{ 1125 struct cfiscsi_session *cs; 1126 1127 cs = arg; 1128 1129 for (;;) { 1130 CFISCSI_SESSION_LOCK(cs); 1131 if (cs->cs_terminating == false) 1132 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1133 CFISCSI_SESSION_UNLOCK(cs); 1134 1135 if (cs->cs_terminating) { 1136 1137 /* 1138 * We used to wait up to 30 seconds to deliver queued 1139 * PDUs to the initiator. We also tried hard to deliver 1140 * SCSI Responses for the aborted PDUs. We don't do 1141 * that anymore. We might need to revisit that. 1142 */ 1143 callout_drain(&cs->cs_callout); 1144 icl_conn_close(cs->cs_conn); 1145 1146 /* 1147 * At this point ICL receive thread is no longer 1148 * running; no new tasks can be queued. 1149 */ 1150 cfiscsi_session_terminate_tasks(cs); 1151 cfiscsi_session_delete(cs); 1152 kthread_exit(); 1153 return; 1154 } 1155 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1156 } 1157} 1158 1159static void 1160cfiscsi_session_terminate(struct cfiscsi_session *cs) 1161{ 1162 1163 if (cs->cs_terminating) 1164 return; 1165 cs->cs_terminating = true; 1166 cv_signal(&cs->cs_maintenance_cv); 1167#ifdef ICL_KERNEL_PROXY 1168 cv_signal(&cs->cs_login_cv); 1169#endif 1170} 1171 1172static int 1173cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1174{ 1175 struct cfiscsi_target *ct; 1176 char *name; 1177 int i; 1178 1179 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1180 1181 ct = cs->cs_target; 1182 name = strdup(cs->cs_initiator_id, M_CTL); 1183 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1184 if (i < 0) { 1185 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1186 i); 1187 cs->cs_ctl_initid = -1; 1188 return (1); 1189 } 1190 cs->cs_ctl_initid = i; 1191#if 0 1192 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1193#endif 1194 1195 return (0); 1196} 1197 1198static void 1199cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1200{ 1201 int error; 1202 1203 if (cs->cs_ctl_initid == -1) 1204 return; 1205 1206 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1207 if (error != 0) { 1208 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1209 error); 1210 } 1211 cs->cs_ctl_initid = -1; 1212} 1213 1214static struct cfiscsi_session * 1215cfiscsi_session_new(struct cfiscsi_softc *softc) 1216{ 1217 struct cfiscsi_session *cs; 1218 int error; 1219 1220 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1221 if (cs == NULL) { 1222 CFISCSI_WARN("malloc failed"); 1223 return (NULL); 1224 } 1225 cs->cs_ctl_initid = -1; 1226 1227 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1228 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1229 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1230 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1231#ifdef ICL_KERNEL_PROXY 1232 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1233#endif 1234 1235 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1236 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1237 cs->cs_conn->ic_error = cfiscsi_error_callback; 1238 cs->cs_conn->ic_prv0 = cs; 1239 1240 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1241 if (error != 0) { 1242 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1243 free(cs, M_CFISCSI); 1244 return (NULL); 1245 } 1246 1247 mtx_lock(&softc->lock); 1248 cs->cs_id = ++softc->last_session_id; 1249 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1250 mtx_unlock(&softc->lock); 1251 1252 /* 1253 * Start pinging the initiator. 1254 */ 1255 callout_init(&cs->cs_callout, 1); 1256 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1257 1258 return (cs); 1259} 1260 1261static void 1262cfiscsi_session_delete(struct cfiscsi_session *cs) 1263{ 1264 struct cfiscsi_softc *softc; 1265 1266 softc = &cfiscsi_softc; 1267 1268 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1269 ("destroying session with outstanding CTL pdus")); 1270 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1271 ("destroying session with non-empty queue")); 1272 1273 cfiscsi_session_unregister_initiator(cs); 1274 if (cs->cs_target != NULL) 1275 cfiscsi_target_release(cs->cs_target); 1276 icl_conn_close(cs->cs_conn); 1277 icl_conn_free(cs->cs_conn); 1278 1279 mtx_lock(&softc->lock); 1280 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1281 cv_signal(&softc->sessions_cv); 1282 mtx_unlock(&softc->lock); 1283 1284 free(cs, M_CFISCSI); 1285} 1286 1287int 1288cfiscsi_init(void) 1289{ 1290 struct cfiscsi_softc *softc; 1291 int retval; 1292 1293 softc = &cfiscsi_softc; 1294 retval = 0; 1295 bzero(softc, sizeof(*softc)); 1296 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1297 1298 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1299#ifdef ICL_KERNEL_PROXY 1300 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1301#endif 1302 TAILQ_INIT(&softc->sessions); 1303 TAILQ_INIT(&softc->targets); 1304 1305 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1306 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1307 UMA_ALIGN_PTR, 0); 1308 1309 return (0); 1310} 1311 1312#ifdef ICL_KERNEL_PROXY 1313static void 1314cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1315{ 1316 struct cfiscsi_session *cs; 1317 1318 cs = cfiscsi_session_new(&cfiscsi_softc); 1319 if (cs == NULL) { 1320 CFISCSI_WARN("failed to create session"); 1321 return; 1322 } 1323 1324 icl_conn_handoff_sock(cs->cs_conn, so); 1325 cs->cs_initiator_sa = sa; 1326 cs->cs_portal_id = portal_id; 1327 cs->cs_waiting_for_ctld = true; 1328 cv_signal(&cfiscsi_softc.accept_cv); 1329} 1330#endif 1331 1332static void 1333cfiscsi_online(void *arg) 1334{ 1335 struct cfiscsi_softc *softc; 1336 struct cfiscsi_target *ct; 1337 int online; 1338 1339 ct = (struct cfiscsi_target *)arg; 1340 softc = ct->ct_softc; 1341 1342 mtx_lock(&softc->lock); 1343 if (ct->ct_online) { 1344 mtx_unlock(&softc->lock); 1345 return; 1346 } 1347 ct->ct_online = 1; 1348 online = softc->online++; 1349 mtx_unlock(&softc->lock); 1350 if (online > 0) 1351 return; 1352 1353#ifdef ICL_KERNEL_PROXY 1354 if (softc->listener != NULL) 1355 icl_listen_free(softc->listener); 1356 softc->listener = icl_listen_new(cfiscsi_accept); 1357#endif 1358} 1359 1360static void 1361cfiscsi_offline(void *arg) 1362{ 1363 struct cfiscsi_softc *softc; 1364 struct cfiscsi_target *ct; 1365 struct cfiscsi_session *cs; 1366 int online; 1367 1368 ct = (struct cfiscsi_target *)arg; 1369 softc = ct->ct_softc; 1370 1371 mtx_lock(&softc->lock); 1372 if (!ct->ct_online) { 1373 mtx_unlock(&softc->lock); 1374 return; 1375 } 1376 ct->ct_online = 0; 1377 online = --softc->online; 1378 1379 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1380 if (cs->cs_target == ct) 1381 cfiscsi_session_terminate(cs); 1382 } 1383 do { 1384 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1385 if (cs->cs_target == ct) 1386 break; 1387 } 1388 if (cs != NULL) 1389 cv_wait(&softc->sessions_cv, &softc->lock); 1390 } while (cs != NULL && ct->ct_online == 0); 1391 mtx_unlock(&softc->lock); 1392 if (online > 0) 1393 return; 1394 1395#ifdef ICL_KERNEL_PROXY 1396 icl_listen_free(softc->listener); 1397 softc->listener = NULL; 1398#endif 1399} 1400 1401static int 1402cfiscsi_info(void *arg, struct sbuf *sb) 1403{ 1404 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1405 int retval; 1406 1407 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1408 ct->ct_state); 1409 return (retval); 1410} 1411 1412static void 1413cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1414{ 1415 struct cfiscsi_softc *softc; 1416 struct cfiscsi_session *cs, *cs2; 1417 struct cfiscsi_target *ct; 1418 struct ctl_iscsi_handoff_params *cihp; 1419 int error; 1420 1421 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1422 softc = &cfiscsi_softc; 1423 1424 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1425 cihp->initiator_name, cihp->initiator_addr, 1426 cihp->target_name); 1427 1428 ct = cfiscsi_target_find(softc, cihp->target_name); 1429 if (ct == NULL) { 1430 ci->status = CTL_ISCSI_ERROR; 1431 snprintf(ci->error_str, sizeof(ci->error_str), 1432 "%s: target not found", __func__); 1433 return; 1434 } 1435 1436#ifdef ICL_KERNEL_PROXY 1437 if (cihp->socket > 0 && cihp->connection_id > 0) { 1438 snprintf(ci->error_str, sizeof(ci->error_str), 1439 "both socket and connection_id set"); 1440 ci->status = CTL_ISCSI_ERROR; 1441 cfiscsi_target_release(ct); 1442 return; 1443 } 1444 if (cihp->socket == 0) { 1445 mtx_lock(&cfiscsi_softc.lock); 1446 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1447 if (cs->cs_id == cihp->connection_id) 1448 break; 1449 } 1450 if (cs == NULL) { 1451 mtx_unlock(&cfiscsi_softc.lock); 1452 snprintf(ci->error_str, sizeof(ci->error_str), 1453 "connection not found"); 1454 ci->status = CTL_ISCSI_ERROR; 1455 cfiscsi_target_release(ct); 1456 return; 1457 } 1458 mtx_unlock(&cfiscsi_softc.lock); 1459 } else { 1460#endif 1461 cs = cfiscsi_session_new(softc); 1462 if (cs == NULL) { 1463 ci->status = CTL_ISCSI_ERROR; 1464 snprintf(ci->error_str, sizeof(ci->error_str), 1465 "%s: cfiscsi_session_new failed", __func__); 1466 cfiscsi_target_release(ct); 1467 return; 1468 } 1469#ifdef ICL_KERNEL_PROXY 1470 } 1471#endif 1472 1473 /* 1474 * First PDU of Full Feature phase has the same CmdSN as the last 1475 * PDU from the Login Phase received from the initiator. Thus, 1476 * the -1 below. 1477 */ 1478 cs->cs_portal_group_tag = cihp->portal_group_tag; 1479 cs->cs_cmdsn = cihp->cmdsn; 1480 cs->cs_statsn = cihp->statsn; 1481 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1482 cs->cs_max_burst_length = cihp->max_burst_length; 1483 cs->cs_immediate_data = !!cihp->immediate_data; 1484 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1485 cs->cs_conn->ic_header_crc32c = true; 1486 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1487 cs->cs_conn->ic_data_crc32c = true; 1488 1489 strlcpy(cs->cs_initiator_name, 1490 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1491 strlcpy(cs->cs_initiator_addr, 1492 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1493 strlcpy(cs->cs_initiator_alias, 1494 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1495 memcpy(cs->cs_initiator_isid, 1496 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1497 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1498 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1499 cihp->initiator_isid[0], cihp->initiator_isid[1], 1500 cihp->initiator_isid[2], cihp->initiator_isid[3], 1501 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1502 1503 mtx_lock(&softc->lock); 1504 if (ct->ct_online == 0) { 1505 mtx_unlock(&softc->lock); 1506 cfiscsi_session_terminate(cs); 1507 cfiscsi_target_release(ct); 1508 ci->status = CTL_ISCSI_ERROR; 1509 snprintf(ci->error_str, sizeof(ci->error_str), 1510 "%s: port offline", __func__); 1511 return; 1512 } 1513 cs->cs_target = ct; 1514 mtx_unlock(&softc->lock); 1515 1516 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1517restart: 1518 if (!cs->cs_terminating) { 1519 mtx_lock(&softc->lock); 1520 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1521 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1522 cs->cs_target == cs2->cs_target && 1523 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1524 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1525 cfiscsi_session_terminate(cs2); 1526 mtx_unlock(&softc->lock); 1527 pause("cfiscsi_reinstate", 1); 1528 goto restart; 1529 } 1530 } 1531 mtx_unlock(&softc->lock); 1532 } 1533 1534 /* 1535 * Register initiator with CTL. 1536 */ 1537 cfiscsi_session_register_initiator(cs); 1538 1539#ifdef ICL_KERNEL_PROXY 1540 if (cihp->socket > 0) { 1541#endif 1542 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1543 if (error != 0) { 1544 cfiscsi_session_terminate(cs); 1545 refcount_release(&cs->cs_outstanding_ctl_pdus); 1546 ci->status = CTL_ISCSI_ERROR; 1547 snprintf(ci->error_str, sizeof(ci->error_str), 1548 "%s: icl_conn_handoff failed with error %d", 1549 __func__, error); 1550 return; 1551 } 1552#ifdef ICL_KERNEL_PROXY 1553 } 1554#endif 1555 1556#ifdef ICL_KERNEL_PROXY 1557 cs->cs_login_phase = false; 1558 1559 /* 1560 * First PDU of the Full Feature phase has likely already arrived. 1561 * We have to pick it up and execute properly. 1562 */ 1563 if (cs->cs_login_pdu != NULL) { 1564 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1565 cfiscsi_pdu_handle(cs->cs_login_pdu); 1566 cs->cs_login_pdu = NULL; 1567 } 1568#endif 1569 1570 refcount_release(&cs->cs_outstanding_ctl_pdus); 1571 ci->status = CTL_ISCSI_OK; 1572} 1573 1574static void 1575cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1576{ 1577 struct ctl_iscsi_list_params *cilp; 1578 struct cfiscsi_session *cs; 1579 struct cfiscsi_softc *softc; 1580 struct sbuf *sb; 1581 int error; 1582 1583 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1584 softc = &cfiscsi_softc; 1585 1586 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1587 if (sb == NULL) { 1588 ci->status = CTL_ISCSI_ERROR; 1589 snprintf(ci->error_str, sizeof(ci->error_str), 1590 "Unable to allocate %d bytes for iSCSI session list", 1591 cilp->alloc_len); 1592 return; 1593 } 1594 1595 sbuf_printf(sb, "<ctlislist>\n"); 1596 mtx_lock(&softc->lock); 1597 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1598#ifdef ICL_KERNEL_PROXY 1599 if (cs->cs_target == NULL) 1600 continue; 1601#endif 1602 error = sbuf_printf(sb, "<connection id=\"%d\">" 1603 "<initiator>%s</initiator>" 1604 "<initiator_addr>%s</initiator_addr>" 1605 "<initiator_alias>%s</initiator_alias>" 1606 "<target>%s</target>" 1607 "<target_alias>%s</target_alias>" 1608 "<header_digest>%s</header_digest>" 1609 "<data_digest>%s</data_digest>" 1610 "<max_data_segment_length>%zd</max_data_segment_length>" 1611 "<immediate_data>%d</immediate_data>" 1612 "<iser>%d</iser>" 1613 "</connection>\n", 1614 cs->cs_id, 1615 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1616 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1617 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1618 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1619 cs->cs_max_data_segment_length, 1620 cs->cs_immediate_data, 1621 cs->cs_conn->ic_iser); 1622 if (error != 0) 1623 break; 1624 } 1625 mtx_unlock(&softc->lock); 1626 error = sbuf_printf(sb, "</ctlislist>\n"); 1627 if (error != 0) { 1628 sbuf_delete(sb); 1629 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1630 snprintf(ci->error_str, sizeof(ci->error_str), 1631 "Out of space, %d bytes is too small", cilp->alloc_len); 1632 return; 1633 } 1634 sbuf_finish(sb); 1635 1636 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1637 cilp->fill_len = sbuf_len(sb) + 1; 1638 ci->status = CTL_ISCSI_OK; 1639 sbuf_delete(sb); 1640} 1641 1642static void 1643cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1644{ 1645 struct icl_pdu *response; 1646 struct iscsi_bhs_asynchronous_message *bhsam; 1647 struct ctl_iscsi_terminate_params *citp; 1648 struct cfiscsi_session *cs; 1649 struct cfiscsi_softc *softc; 1650 int found = 0; 1651 1652 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1653 softc = &cfiscsi_softc; 1654 1655 mtx_lock(&softc->lock); 1656 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1657 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1658 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1659 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1660 continue; 1661 1662 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1663 if (response == NULL) { 1664 /* 1665 * Oh well. Just terminate the connection. 1666 */ 1667 } else { 1668 bhsam = (struct iscsi_bhs_asynchronous_message *) 1669 response->ip_bhs; 1670 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1671 bhsam->bhsam_flags = 0x80; 1672 bhsam->bhsam_0xffffffff = 0xffffffff; 1673 bhsam->bhsam_async_event = 1674 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1675 cfiscsi_pdu_queue(response); 1676 } 1677 cfiscsi_session_terminate(cs); 1678 found++; 1679 } 1680 mtx_unlock(&softc->lock); 1681 1682 if (found == 0) { 1683 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1684 snprintf(ci->error_str, sizeof(ci->error_str), 1685 "No matching connections found"); 1686 return; 1687 } 1688 1689 ci->status = CTL_ISCSI_OK; 1690} 1691 1692static void 1693cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1694{ 1695 struct icl_pdu *response; 1696 struct iscsi_bhs_asynchronous_message *bhsam; 1697 struct ctl_iscsi_logout_params *cilp; 1698 struct cfiscsi_session *cs; 1699 struct cfiscsi_softc *softc; 1700 int found = 0; 1701 1702 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1703 softc = &cfiscsi_softc; 1704 1705 mtx_lock(&softc->lock); 1706 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1707 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1708 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1709 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1710 continue; 1711 1712 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1713 if (response == NULL) { 1714 ci->status = CTL_ISCSI_ERROR; 1715 snprintf(ci->error_str, sizeof(ci->error_str), 1716 "Unable to allocate memory"); 1717 mtx_unlock(&softc->lock); 1718 return; 1719 } 1720 bhsam = 1721 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1722 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1723 bhsam->bhsam_flags = 0x80; 1724 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1725 bhsam->bhsam_parameter3 = htons(10); 1726 cfiscsi_pdu_queue(response); 1727 found++; 1728 } 1729 mtx_unlock(&softc->lock); 1730 1731 if (found == 0) { 1732 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1733 snprintf(ci->error_str, sizeof(ci->error_str), 1734 "No matching connections found"); 1735 return; 1736 } 1737 1738 ci->status = CTL_ISCSI_OK; 1739} 1740 1741#ifdef ICL_KERNEL_PROXY 1742static void 1743cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1744{ 1745 struct ctl_iscsi_listen_params *cilp; 1746 struct sockaddr *sa; 1747 int error; 1748 1749 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1750 1751 if (cfiscsi_softc.listener == NULL) { 1752 CFISCSI_DEBUG("no listener"); 1753 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1754 ci->status = CTL_ISCSI_ERROR; 1755 return; 1756 } 1757 1758 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1759 if (error != 0) { 1760 CFISCSI_DEBUG("getsockaddr, error %d", error); 1761 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1762 ci->status = CTL_ISCSI_ERROR; 1763 return; 1764 } 1765 1766 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1767 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1768 if (error != 0) { 1769 free(sa, M_SONAME); 1770 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1771 snprintf(ci->error_str, sizeof(ci->error_str), 1772 "icl_listen_add failed, error %d", error); 1773 ci->status = CTL_ISCSI_ERROR; 1774 return; 1775 } 1776 1777 ci->status = CTL_ISCSI_OK; 1778} 1779 1780static void 1781cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1782{ 1783 struct ctl_iscsi_accept_params *ciap; 1784 struct cfiscsi_session *cs; 1785 int error; 1786 1787 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1788 1789 mtx_lock(&cfiscsi_softc.lock); 1790 for (;;) { 1791 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1792 if (cs->cs_waiting_for_ctld) 1793 break; 1794 } 1795 if (cs != NULL) 1796 break; 1797 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1798 if (error != 0) { 1799 mtx_unlock(&cfiscsi_softc.lock); 1800 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1801 ci->status = CTL_ISCSI_ERROR; 1802 return; 1803 } 1804 } 1805 mtx_unlock(&cfiscsi_softc.lock); 1806 1807 cs->cs_waiting_for_ctld = false; 1808 cs->cs_login_phase = true; 1809 1810 ciap->connection_id = cs->cs_id; 1811 ciap->portal_id = cs->cs_portal_id; 1812 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1813 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1814 cs->cs_initiator_sa->sa_len); 1815 if (error != 0) { 1816 snprintf(ci->error_str, sizeof(ci->error_str), 1817 "copyout failed with error %d", error); 1818 ci->status = CTL_ISCSI_ERROR; 1819 return; 1820 } 1821 1822 ci->status = CTL_ISCSI_OK; 1823} 1824 1825static void 1826cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1827{ 1828 struct ctl_iscsi_send_params *cisp; 1829 struct cfiscsi_session *cs; 1830 struct icl_pdu *ip; 1831 size_t datalen; 1832 void *data; 1833 int error; 1834 1835 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1836 1837 mtx_lock(&cfiscsi_softc.lock); 1838 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1839 if (cs->cs_id == cisp->connection_id) 1840 break; 1841 } 1842 if (cs == NULL) { 1843 mtx_unlock(&cfiscsi_softc.lock); 1844 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1845 ci->status = CTL_ISCSI_ERROR; 1846 return; 1847 } 1848 mtx_unlock(&cfiscsi_softc.lock); 1849 1850#if 0 1851 if (cs->cs_login_phase == false) 1852 return (EBUSY); 1853#endif 1854 1855 if (cs->cs_terminating) { 1856 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1857 ci->status = CTL_ISCSI_ERROR; 1858 return; 1859 } 1860 1861 datalen = cisp->data_segment_len; 1862 /* 1863 * XXX 1864 */ 1865 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1866 if (datalen > 65535) { 1867 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1868 ci->status = CTL_ISCSI_ERROR; 1869 return; 1870 } 1871 if (datalen > 0) { 1872 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1873 error = copyin(cisp->data_segment, data, datalen); 1874 if (error != 0) { 1875 free(data, M_CFISCSI); 1876 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1877 ci->status = CTL_ISCSI_ERROR; 1878 return; 1879 } 1880 } 1881 1882 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1883 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1884 if (datalen > 0) { 1885 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1886 free(data, M_CFISCSI); 1887 } 1888 CFISCSI_SESSION_LOCK(cs); 1889 icl_pdu_queue(ip); 1890 CFISCSI_SESSION_UNLOCK(cs); 1891 ci->status = CTL_ISCSI_OK; 1892} 1893 1894static void 1895cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1896{ 1897 struct ctl_iscsi_receive_params *cirp; 1898 struct cfiscsi_session *cs; 1899 struct icl_pdu *ip; 1900 void *data; 1901 int error; 1902 1903 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1904 1905 mtx_lock(&cfiscsi_softc.lock); 1906 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1907 if (cs->cs_id == cirp->connection_id) 1908 break; 1909 } 1910 if (cs == NULL) { 1911 mtx_unlock(&cfiscsi_softc.lock); 1912 snprintf(ci->error_str, sizeof(ci->error_str), 1913 "connection not found"); 1914 ci->status = CTL_ISCSI_ERROR; 1915 return; 1916 } 1917 mtx_unlock(&cfiscsi_softc.lock); 1918 1919#if 0 1920 if (is->is_login_phase == false) 1921 return (EBUSY); 1922#endif 1923 1924 CFISCSI_SESSION_LOCK(cs); 1925 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1926 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1927 if (error != 0) { 1928 CFISCSI_SESSION_UNLOCK(cs); 1929 snprintf(ci->error_str, sizeof(ci->error_str), 1930 "interrupted by signal"); 1931 ci->status = CTL_ISCSI_ERROR; 1932 return; 1933 } 1934 } 1935 1936 if (cs->cs_terminating) { 1937 CFISCSI_SESSION_UNLOCK(cs); 1938 snprintf(ci->error_str, sizeof(ci->error_str), 1939 "connection terminating"); 1940 ci->status = CTL_ISCSI_ERROR; 1941 return; 1942 } 1943 ip = cs->cs_login_pdu; 1944 cs->cs_login_pdu = NULL; 1945 CFISCSI_SESSION_UNLOCK(cs); 1946 1947 if (ip->ip_data_len > cirp->data_segment_len) { 1948 icl_pdu_free(ip); 1949 snprintf(ci->error_str, sizeof(ci->error_str), 1950 "data segment too big"); 1951 ci->status = CTL_ISCSI_ERROR; 1952 return; 1953 } 1954 1955 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1956 if (ip->ip_data_len > 0) { 1957 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1958 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1959 copyout(data, cirp->data_segment, ip->ip_data_len); 1960 free(data, M_CFISCSI); 1961 } 1962 1963 icl_pdu_free(ip); 1964 ci->status = CTL_ISCSI_OK; 1965} 1966 1967#endif /* !ICL_KERNEL_PROXY */ 1968 1969static void 1970cfiscsi_ioctl_port_create(struct ctl_req *req) 1971{ 1972 struct cfiscsi_target *ct; 1973 struct ctl_port *port; 1974 const char *target, *alias, *tag; 1975 struct scsi_vpd_id_descriptor *desc; 1976 ctl_options_t opts; 1977 int retval, len, idlen; 1978 1979 ctl_init_opts(&opts, req->num_args, req->kern_args); 1980 target = ctl_get_opt(&opts, "cfiscsi_target"); 1981 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1982 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1983 if (target == NULL || tag == NULL) { 1984 req->status = CTL_LUN_ERROR; 1985 snprintf(req->error_str, sizeof(req->error_str), 1986 "Missing required argument"); 1987 ctl_free_opts(&opts); 1988 return; 1989 } 1990 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1991 if (ct == NULL) { 1992 req->status = CTL_LUN_ERROR; 1993 snprintf(req->error_str, sizeof(req->error_str), 1994 "failed to create target \"%s\"", target); 1995 ctl_free_opts(&opts); 1996 return; 1997 } 1998 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1999 req->status = CTL_LUN_ERROR; 2000 snprintf(req->error_str, sizeof(req->error_str), 2001 "target \"%s\" already exists", target); 2002 cfiscsi_target_release(ct); 2003 ctl_free_opts(&opts); 2004 return; 2005 } 2006 port = &ct->ct_port; 2007 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2008 goto done; 2009 2010 port->frontend = &cfiscsi_frontend; 2011 port->port_type = CTL_PORT_ISCSI; 2012 /* XXX KDM what should the real number be here? */ 2013 port->num_requested_ctl_io = 4096; 2014 port->port_name = "iscsi"; 2015 port->physical_port = strtoul(tag, NULL, 0); 2016 port->virtual_port = ct->ct_target_id; 2017 port->port_online = cfiscsi_online; 2018 port->port_offline = cfiscsi_offline; 2019 port->port_info = cfiscsi_info; 2020 port->onoff_arg = ct; 2021 port->lun_enable = cfiscsi_lun_enable; 2022 port->lun_disable = cfiscsi_lun_disable; 2023 port->lun_map = cfiscsi_lun_map; 2024 port->targ_lun_arg = ct; 2025 port->fe_datamove = cfiscsi_datamove; 2026 port->fe_done = cfiscsi_done; 2027 2028 /* XXX KDM what should we report here? */ 2029 /* XXX These should probably be fetched from CTL. */ 2030 port->max_targets = 1; 2031 port->max_target_id = 15; 2032 2033 port->options = opts; 2034 STAILQ_INIT(&opts); 2035 2036 /* Generate Port ID. */ 2037 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2038 idlen = roundup2(idlen, 4); 2039 len = sizeof(struct scsi_vpd_device_id) + idlen; 2040 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2041 M_CTL, M_WAITOK | M_ZERO); 2042 port->port_devid->len = len; 2043 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2044 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2045 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2046 SVPD_ID_TYPE_SCSI_NAME; 2047 desc->length = idlen; 2048 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2049 target, port->physical_port); 2050 2051 /* Generate Target ID. */ 2052 idlen = strlen(target) + 1; 2053 idlen = roundup2(idlen, 4); 2054 len = sizeof(struct scsi_vpd_device_id) + idlen; 2055 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2056 M_CTL, M_WAITOK | M_ZERO); 2057 port->target_devid->len = len; 2058 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2059 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2060 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2061 SVPD_ID_TYPE_SCSI_NAME; 2062 desc->length = idlen; 2063 strlcpy(desc->identifier, target, idlen); 2064 2065 retval = ctl_port_register(port); 2066 if (retval != 0) { 2067 ctl_free_opts(&port->options); 2068 cfiscsi_target_release(ct); 2069 free(port->port_devid, M_CFISCSI); 2070 free(port->target_devid, M_CFISCSI); 2071 req->status = CTL_LUN_ERROR; 2072 snprintf(req->error_str, sizeof(req->error_str), 2073 "ctl_frontend_register() failed with error %d", retval); 2074 return; 2075 } 2076done: 2077 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2078 req->status = CTL_LUN_OK; 2079 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2080 sizeof(port->targ_port)); //XXX 2081} 2082 2083static void 2084cfiscsi_ioctl_port_remove(struct ctl_req *req) 2085{ 2086 struct cfiscsi_target *ct; 2087 const char *target; 2088 ctl_options_t opts; 2089 2090 ctl_init_opts(&opts, req->num_args, req->kern_args); 2091 target = ctl_get_opt(&opts, "cfiscsi_target"); 2092 if (target == NULL) { 2093 ctl_free_opts(&opts); 2094 req->status = CTL_LUN_ERROR; 2095 snprintf(req->error_str, sizeof(req->error_str), 2096 "Missing required argument"); 2097 return; 2098 } 2099 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2100 if (ct == NULL) { 2101 ctl_free_opts(&opts); 2102 req->status = CTL_LUN_ERROR; 2103 snprintf(req->error_str, sizeof(req->error_str), 2104 "can't find target \"%s\"", target); 2105 return; 2106 } 2107 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2108 ctl_free_opts(&opts); 2109 req->status = CTL_LUN_ERROR; 2110 snprintf(req->error_str, sizeof(req->error_str), 2111 "target \"%s\" is already dying", target); 2112 return; 2113 } 2114 ctl_free_opts(&opts); 2115 2116 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2117 ctl_port_offline(&ct->ct_port); 2118 cfiscsi_target_release(ct); 2119 cfiscsi_target_release(ct); 2120} 2121 2122static int 2123cfiscsi_ioctl(struct cdev *dev, 2124 u_long cmd, caddr_t addr, int flag, struct thread *td) 2125{ 2126 struct ctl_iscsi *ci; 2127 struct ctl_req *req; 2128 2129 if (cmd == CTL_PORT_REQ) { 2130 req = (struct ctl_req *)addr; 2131 switch (req->reqtype) { 2132 case CTL_REQ_CREATE: 2133 cfiscsi_ioctl_port_create(req); 2134 break; 2135 case CTL_REQ_REMOVE: 2136 cfiscsi_ioctl_port_remove(req); 2137 break; 2138 default: 2139 req->status = CTL_LUN_ERROR; 2140 snprintf(req->error_str, sizeof(req->error_str), 2141 "Unsupported request type %d", req->reqtype); 2142 } 2143 return (0); 2144 } 2145 2146 if (cmd != CTL_ISCSI) 2147 return (ENOTTY); 2148 2149 ci = (struct ctl_iscsi *)addr; 2150 switch (ci->type) { 2151 case CTL_ISCSI_HANDOFF: 2152 cfiscsi_ioctl_handoff(ci); 2153 break; 2154 case CTL_ISCSI_LIST: 2155 cfiscsi_ioctl_list(ci); 2156 break; 2157 case CTL_ISCSI_TERMINATE: 2158 cfiscsi_ioctl_terminate(ci); 2159 break; 2160 case CTL_ISCSI_LOGOUT: 2161 cfiscsi_ioctl_logout(ci); 2162 break; 2163#ifdef ICL_KERNEL_PROXY 2164 case CTL_ISCSI_LISTEN: 2165 cfiscsi_ioctl_listen(ci); 2166 break; 2167 case CTL_ISCSI_ACCEPT: 2168 cfiscsi_ioctl_accept(ci); 2169 break; 2170 case CTL_ISCSI_SEND: 2171 cfiscsi_ioctl_send(ci); 2172 break; 2173 case CTL_ISCSI_RECEIVE: 2174 cfiscsi_ioctl_receive(ci); 2175 break; 2176#else 2177 case CTL_ISCSI_LISTEN: 2178 case CTL_ISCSI_ACCEPT: 2179 case CTL_ISCSI_SEND: 2180 case CTL_ISCSI_RECEIVE: 2181 ci->status = CTL_ISCSI_ERROR; 2182 snprintf(ci->error_str, sizeof(ci->error_str), 2183 "%s: CTL compiled without ICL_KERNEL_PROXY", 2184 __func__); 2185 break; 2186#endif /* !ICL_KERNEL_PROXY */ 2187 default: 2188 ci->status = CTL_ISCSI_ERROR; 2189 snprintf(ci->error_str, sizeof(ci->error_str), 2190 "%s: invalid iSCSI request type %d", __func__, ci->type); 2191 break; 2192 } 2193 2194 return (0); 2195} 2196 2197static void 2198cfiscsi_target_hold(struct cfiscsi_target *ct) 2199{ 2200 2201 refcount_acquire(&ct->ct_refcount); 2202} 2203 2204static void 2205cfiscsi_target_release(struct cfiscsi_target *ct) 2206{ 2207 struct cfiscsi_softc *softc; 2208 2209 softc = ct->ct_softc; 2210 mtx_lock(&softc->lock); 2211 if (refcount_release(&ct->ct_refcount)) { 2212 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2213 mtx_unlock(&softc->lock); 2214 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2215 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2216 if (ctl_port_deregister(&ct->ct_port) != 0) 2217 printf("%s: ctl_port_deregister() failed\n", 2218 __func__); 2219 } 2220 free(ct, M_CFISCSI); 2221 2222 return; 2223 } 2224 mtx_unlock(&softc->lock); 2225} 2226 2227static struct cfiscsi_target * 2228cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2229{ 2230 struct cfiscsi_target *ct; 2231 2232 mtx_lock(&softc->lock); 2233 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2234 if (strcmp(name, ct->ct_name) != 0 || 2235 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2236 continue; 2237 cfiscsi_target_hold(ct); 2238 mtx_unlock(&softc->lock); 2239 return (ct); 2240 } 2241 mtx_unlock(&softc->lock); 2242 2243 return (NULL); 2244} 2245 2246static struct cfiscsi_target * 2247cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2248 const char *alias) 2249{ 2250 struct cfiscsi_target *ct, *newct; 2251 int i; 2252 2253 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2254 return (NULL); 2255 2256 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2257 2258 mtx_lock(&softc->lock); 2259 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2260 if (strcmp(name, ct->ct_name) != 0 || 2261 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2262 continue; 2263 cfiscsi_target_hold(ct); 2264 mtx_unlock(&softc->lock); 2265 free(newct, M_CFISCSI); 2266 return (ct); 2267 } 2268 2269 for (i = 0; i < CTL_MAX_LUNS; i++) 2270 newct->ct_luns[i] = UINT32_MAX; 2271 2272 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2273 if (alias != NULL) 2274 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2275 refcount_init(&newct->ct_refcount, 1); 2276 newct->ct_softc = softc; 2277 if (TAILQ_EMPTY(&softc->targets)) 2278 softc->last_target_id = 0; 2279 newct->ct_target_id = ++softc->last_target_id; 2280 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2281 mtx_unlock(&softc->lock); 2282 2283 return (newct); 2284} 2285 2286/* 2287 * Takes LUN from the target space and returns LUN from the CTL space. 2288 */ 2289static uint32_t 2290cfiscsi_lun_map(void *arg, uint32_t lun) 2291{ 2292 struct cfiscsi_target *ct = arg; 2293 2294 if (lun >= CTL_MAX_LUNS) { 2295 CFISCSI_DEBUG("requested lun number %d is higher " 2296 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2297 return (UINT32_MAX); 2298 } 2299 return (ct->ct_luns[lun]); 2300} 2301 2302static int 2303cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2304 unsigned long lun_id, unsigned long ctl_lun_id) 2305{ 2306 2307 if (lun_id >= CTL_MAX_LUNS) { 2308 CFISCSI_WARN("requested lun number %ld is higher " 2309 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2310 return (-1); 2311 } 2312 2313 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2314 /* 2315 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2316 * when the LUN is created, and a second time just before 2317 * the port is brought online; don't emit warnings 2318 * for that case. 2319 */ 2320 if (ct->ct_luns[lun_id] == ctl_lun_id) 2321 return (0); 2322 CFISCSI_WARN("lun %ld already allocated", lun_id); 2323 return (-1); 2324 } 2325 2326#if 0 2327 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2328 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2329#endif 2330 2331 ct->ct_luns[lun_id] = ctl_lun_id; 2332 2333 return (0); 2334} 2335 2336static int 2337cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2338{ 2339 struct cfiscsi_softc *softc; 2340 struct cfiscsi_target *ct; 2341 const char *target = NULL; 2342 const char *lun = NULL; 2343 unsigned long tmp; 2344 2345 ct = (struct cfiscsi_target *)arg; 2346 softc = ct->ct_softc; 2347 2348 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2349 "cfiscsi_target"); 2350 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2351 "cfiscsi_lun"); 2352 2353 if (target == NULL && lun == NULL) 2354 return (0); 2355 2356 if (target == NULL || lun == NULL) { 2357 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2358 "cfiscsi_lun, or the other way around; ignoring"); 2359 return (0); 2360 } 2361 2362 if (strcmp(target, ct->ct_name) != 0) 2363 return (0); 2364 2365 tmp = strtoul(lun, NULL, 10); 2366 cfiscsi_target_set_lun(ct, tmp, lun_id); 2367 return (0); 2368} 2369 2370static int 2371cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2372{ 2373 struct cfiscsi_softc *softc; 2374 struct cfiscsi_target *ct; 2375 int i; 2376 2377 ct = (struct cfiscsi_target *)arg; 2378 softc = ct->ct_softc; 2379 2380 mtx_lock(&softc->lock); 2381 for (i = 0; i < CTL_MAX_LUNS; i++) { 2382 if (ct->ct_luns[i] != lun_id) 2383 continue; 2384 ct->ct_luns[i] = UINT32_MAX; 2385 break; 2386 } 2387 mtx_unlock(&softc->lock); 2388 return (0); 2389} 2390 2391static void 2392cfiscsi_datamove_in(union ctl_io *io) 2393{ 2394 struct cfiscsi_session *cs; 2395 struct icl_pdu *request, *response; 2396 const struct iscsi_bhs_scsi_command *bhssc; 2397 struct iscsi_bhs_data_in *bhsdi; 2398 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2399 size_t len, expected_len, sg_len, buffer_offset; 2400 const char *sg_addr; 2401 int ctl_sg_count, error, i; 2402 2403 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2404 cs = PDU_SESSION(request); 2405 2406 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2407 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2408 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2409 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2410 2411 if (io->scsiio.kern_sg_entries > 0) { 2412 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2413 ctl_sg_count = io->scsiio.kern_sg_entries; 2414 } else { 2415 ctl_sglist = &ctl_sg_entry; 2416 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2417 ctl_sglist->len = io->scsiio.kern_data_len; 2418 ctl_sg_count = 1; 2419 } 2420 2421 /* 2422 * This is the total amount of data to be transferred within the current 2423 * SCSI command. We need to record it so that we can properly report 2424 * underflow/underflow. 2425 */ 2426 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2427 2428 /* 2429 * This is the offset within the current SCSI command; for the first 2430 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2431 * it will be the sum of lengths of previous ones. 2432 */ 2433 buffer_offset = io->scsiio.kern_rel_offset; 2434 2435 /* 2436 * This is the transfer length expected by the initiator. In theory, 2437 * it could be different from the correct amount of data from the SCSI 2438 * point of view, even if that doesn't make any sense. 2439 */ 2440 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2441#if 0 2442 if (expected_len != io->scsiio.kern_total_len) { 2443 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2444 "actual length %zd", expected_len, 2445 (size_t)io->scsiio.kern_total_len); 2446 } 2447#endif 2448 2449 if (buffer_offset >= expected_len) { 2450#if 0 2451 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2452 "already sent the expected len", buffer_offset); 2453#endif 2454 io->scsiio.be_move_done(io); 2455 return; 2456 } 2457 2458 i = 0; 2459 sg_addr = NULL; 2460 sg_len = 0; 2461 response = NULL; 2462 bhsdi = NULL; 2463 for (;;) { 2464 if (response == NULL) { 2465 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2466 if (response == NULL) { 2467 CFISCSI_SESSION_WARN(cs, "failed to " 2468 "allocate memory; dropping connection"); 2469 ctl_set_busy(&io->scsiio); 2470 io->scsiio.be_move_done(io); 2471 cfiscsi_session_terminate(cs); 2472 return; 2473 } 2474 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2475 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2476 bhsdi->bhsdi_initiator_task_tag = 2477 bhssc->bhssc_initiator_task_tag; 2478 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2479 PDU_EXPDATASN(request)++; 2480 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2481 } 2482 2483 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2484 if (sg_len == 0) { 2485 sg_addr = ctl_sglist[i].addr; 2486 sg_len = ctl_sglist[i].len; 2487 KASSERT(sg_len > 0, ("sg_len <= 0")); 2488 } 2489 2490 len = sg_len; 2491 2492 /* 2493 * Truncate to maximum data segment length. 2494 */ 2495 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2496 ("ip_data_len %zd >= max_data_segment_length %zd", 2497 response->ip_data_len, cs->cs_max_data_segment_length)); 2498 if (response->ip_data_len + len > 2499 cs->cs_max_data_segment_length) { 2500 len = cs->cs_max_data_segment_length - 2501 response->ip_data_len; 2502 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2503 len, sg_len)); 2504 } 2505 2506 /* 2507 * Truncate to expected data transfer length. 2508 */ 2509 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2510 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2511 buffer_offset, response->ip_data_len, expected_len)); 2512 if (buffer_offset + response->ip_data_len + len > expected_len) { 2513 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2514 "to expected data transfer length %zd", 2515 buffer_offset + response->ip_data_len + len, expected_len); 2516 len = expected_len - (buffer_offset + response->ip_data_len); 2517 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2518 len, sg_len)); 2519 } 2520 2521 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2522 if (error != 0) { 2523 CFISCSI_SESSION_WARN(cs, "failed to " 2524 "allocate memory; dropping connection"); 2525 icl_pdu_free(response); 2526 ctl_set_busy(&io->scsiio); 2527 io->scsiio.be_move_done(io); 2528 cfiscsi_session_terminate(cs); 2529 return; 2530 } 2531 sg_addr += len; 2532 sg_len -= len; 2533 2534 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2535 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2536 buffer_offset, response->ip_data_len, expected_len)); 2537 if (buffer_offset + response->ip_data_len == expected_len) { 2538 /* 2539 * Already have the amount of data the initiator wanted. 2540 */ 2541 break; 2542 } 2543 2544 if (sg_len == 0) { 2545 /* 2546 * End of scatter-gather segment; 2547 * proceed to the next one... 2548 */ 2549 if (i == ctl_sg_count - 1) { 2550 /* 2551 * ... unless this was the last one. 2552 */ 2553 break; 2554 } 2555 i++; 2556 } 2557 2558 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2559 /* 2560 * Can't stuff more data into the current PDU; 2561 * queue it. Note that's not enough to check 2562 * for kern_data_resid == 0 instead; there 2563 * may be several Data-In PDUs for the final 2564 * call to cfiscsi_datamove(), and we want 2565 * to set the F flag only on the last of them. 2566 */ 2567 buffer_offset += response->ip_data_len; 2568 if (buffer_offset == io->scsiio.kern_total_len || 2569 buffer_offset == expected_len) 2570 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2571 cfiscsi_pdu_queue(response); 2572 response = NULL; 2573 bhsdi = NULL; 2574 } 2575 } 2576 if (response != NULL) { 2577 buffer_offset += response->ip_data_len; 2578 if (buffer_offset == io->scsiio.kern_total_len || 2579 buffer_offset == expected_len) 2580 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2581 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2582 cfiscsi_pdu_queue(response); 2583 } 2584 2585 io->scsiio.be_move_done(io); 2586} 2587 2588static void 2589cfiscsi_datamove_out(union ctl_io *io) 2590{ 2591 struct cfiscsi_session *cs; 2592 struct icl_pdu *request, *response; 2593 const struct iscsi_bhs_scsi_command *bhssc; 2594 struct iscsi_bhs_r2t *bhsr2t; 2595 struct cfiscsi_data_wait *cdw; 2596 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2597 uint32_t expected_len, r2t_off, r2t_len; 2598 uint32_t target_transfer_tag; 2599 bool done; 2600 2601 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2602 cs = PDU_SESSION(request); 2603 2604 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2605 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2606 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2607 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2608 2609 /* 2610 * We need to record it so that we can properly report 2611 * underflow/underflow. 2612 */ 2613 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2614 2615 /* 2616 * Report write underflow as error since CTL and backends don't 2617 * really support it, and SCSI does not tell how to do it right. 2618 */ 2619 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2620 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2621 expected_len) { 2622 io->scsiio.io_hdr.port_status = 43; 2623 io->scsiio.be_move_done(io); 2624 return; 2625 } 2626 2627 target_transfer_tag = 2628 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2629 2630#if 0 2631 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2632 "task tag 0x%x, target transfer tag 0x%x", 2633 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2634#endif 2635 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2636 if (cdw == NULL) { 2637 CFISCSI_SESSION_WARN(cs, "failed to " 2638 "allocate memory; dropping connection"); 2639 ctl_set_busy(&io->scsiio); 2640 io->scsiio.be_move_done(io); 2641 cfiscsi_session_terminate(cs); 2642 return; 2643 } 2644 cdw->cdw_ctl_io = io; 2645 cdw->cdw_target_transfer_tag = target_transfer_tag; 2646 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2647 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2648 2649 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2650 if (io->scsiio.kern_sg_entries > 0) { 2651 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2652 } else { 2653 ctl_sglist = &ctl_sg_entry; 2654 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2655 ctl_sglist->len = io->scsiio.kern_data_len; 2656 } 2657 cdw->cdw_sg_index = 0; 2658 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2659 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2660 r2t_off = io->scsiio.ext_data_filled; 2661 while (r2t_off > 0) { 2662 if (r2t_off >= cdw->cdw_sg_len) { 2663 r2t_off -= cdw->cdw_sg_len; 2664 cdw->cdw_sg_index++; 2665 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2666 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2667 continue; 2668 } 2669 cdw->cdw_sg_addr += r2t_off; 2670 cdw->cdw_sg_len -= r2t_off; 2671 r2t_off = 0; 2672 } 2673 2674 if (cs->cs_immediate_data && 2675 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2676 icl_pdu_data_segment_length(request)) { 2677 done = cfiscsi_handle_data_segment(request, cdw); 2678 if (done) { 2679 uma_zfree(cfiscsi_data_wait_zone, cdw); 2680 io->scsiio.be_move_done(io); 2681 return; 2682 } 2683 } 2684 2685 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2686 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2687 cs->cs_max_burst_length); 2688 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2689 2690 CFISCSI_SESSION_LOCK(cs); 2691 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2692 CFISCSI_SESSION_UNLOCK(cs); 2693 2694 /* 2695 * XXX: We should limit the number of outstanding R2T PDUs 2696 * per task to MaxOutstandingR2T. 2697 */ 2698 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2699 if (response == NULL) { 2700 CFISCSI_SESSION_WARN(cs, "failed to " 2701 "allocate memory; dropping connection"); 2702 ctl_set_busy(&io->scsiio); 2703 io->scsiio.be_move_done(io); 2704 cfiscsi_session_terminate(cs); 2705 return; 2706 } 2707 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2708 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2709 bhsr2t->bhsr2t_flags = 0x80; 2710 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2711 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2712 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2713 /* 2714 * XXX: Here we assume that cfiscsi_datamove() won't ever 2715 * be running concurrently on several CPUs for a given 2716 * command. 2717 */ 2718 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2719 PDU_R2TSN(request)++; 2720 /* 2721 * This is the offset within the current SCSI command; 2722 * i.e. for the first call of datamove(), it will be 0, 2723 * and for subsequent ones it will be the sum of lengths 2724 * of previous ones. 2725 * 2726 * The ext_data_filled is to account for unsolicited 2727 * (immediate) data that might have already arrived. 2728 */ 2729 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2730 /* 2731 * This is the total length (sum of S/G lengths) this call 2732 * to cfiscsi_datamove() is supposed to handle, limited by 2733 * MaxBurstLength. 2734 */ 2735 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2736 cfiscsi_pdu_queue(response); 2737} 2738 2739static void 2740cfiscsi_datamove(union ctl_io *io) 2741{ 2742 2743 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2744 cfiscsi_datamove_in(io); 2745 else { 2746 /* We hadn't received anything during this datamove yet. */ 2747 io->scsiio.ext_data_filled = 0; 2748 cfiscsi_datamove_out(io); 2749 } 2750} 2751 2752static void 2753cfiscsi_scsi_command_done(union ctl_io *io) 2754{ 2755 struct icl_pdu *request, *response; 2756 struct iscsi_bhs_scsi_command *bhssc; 2757 struct iscsi_bhs_scsi_response *bhssr; 2758#ifdef DIAGNOSTIC 2759 struct cfiscsi_data_wait *cdw; 2760#endif 2761 struct cfiscsi_session *cs; 2762 uint16_t sense_length; 2763 2764 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2765 cs = PDU_SESSION(request); 2766 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2767 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2768 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2769 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2770 2771 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2772 // bhssc->bhssc_initiator_task_tag); 2773 2774#ifdef DIAGNOSTIC 2775 CFISCSI_SESSION_LOCK(cs); 2776 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2777 KASSERT(bhssc->bhssc_initiator_task_tag != 2778 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2779 CFISCSI_SESSION_UNLOCK(cs); 2780#endif 2781 2782 /* 2783 * Do not return status for aborted commands. 2784 * There are exceptions, but none supported by CTL yet. 2785 */ 2786 if ((io->io_hdr.flags & CTL_FLAG_ABORT) && 2787 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) { 2788 ctl_free_io(io); 2789 icl_pdu_free(request); 2790 return; 2791 } 2792 2793 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2794 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2795 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2796 bhssr->bhssr_flags = 0x80; 2797 /* 2798 * XXX: We don't deal with bidirectional under/overflows; 2799 * does anything actually support those? 2800 */ 2801 if (PDU_TOTAL_TRANSFER_LEN(request) < 2802 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2803 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2804 bhssr->bhssr_residual_count = 2805 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2806 PDU_TOTAL_TRANSFER_LEN(request)); 2807 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2808 // ntohl(bhssr->bhssr_residual_count)); 2809 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2810 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2811 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2812 bhssr->bhssr_residual_count = 2813 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2814 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2815 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2816 // ntohl(bhssr->bhssr_residual_count)); 2817 } 2818 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2819 bhssr->bhssr_status = io->scsiio.scsi_status; 2820 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2821 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2822 2823 if (io->scsiio.sense_len > 0) { 2824#if 0 2825 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2826 io->scsiio.sense_len); 2827#endif 2828 sense_length = htons(io->scsiio.sense_len); 2829 icl_pdu_append_data(response, 2830 &sense_length, sizeof(sense_length), M_WAITOK); 2831 icl_pdu_append_data(response, 2832 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2833 } 2834 2835 ctl_free_io(io); 2836 icl_pdu_free(request); 2837 cfiscsi_pdu_queue(response); 2838} 2839 2840static void 2841cfiscsi_task_management_done(union ctl_io *io) 2842{ 2843 struct icl_pdu *request, *response; 2844 struct iscsi_bhs_task_management_request *bhstmr; 2845 struct iscsi_bhs_task_management_response *bhstmr2; 2846 struct cfiscsi_data_wait *cdw, *tmpcdw; 2847 struct cfiscsi_session *cs; 2848 2849 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2850 cs = PDU_SESSION(request); 2851 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2852 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2853 ISCSI_BHS_OPCODE_TASK_REQUEST, 2854 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2855 2856#if 0 2857 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2858 bhstmr->bhstmr_initiator_task_tag, 2859 bhstmr->bhstmr_referenced_task_tag); 2860#endif 2861 2862 if ((bhstmr->bhstmr_function & ~0x80) == 2863 BHSTMR_FUNCTION_ABORT_TASK) { 2864 /* 2865 * Make sure we no longer wait for Data-Out for this command. 2866 */ 2867 CFISCSI_SESSION_LOCK(cs); 2868 TAILQ_FOREACH_SAFE(cdw, 2869 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2870 if (bhstmr->bhstmr_referenced_task_tag != 2871 cdw->cdw_initiator_task_tag) 2872 continue; 2873 2874#if 0 2875 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2876 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2877#endif 2878 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2879 cdw, cdw_next); 2880 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2881 uma_zfree(cfiscsi_data_wait_zone, cdw); 2882 } 2883 CFISCSI_SESSION_UNLOCK(cs); 2884 } 2885 2886 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2887 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2888 response->ip_bhs; 2889 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2890 bhstmr2->bhstmr_flags = 0x80; 2891 if (io->io_hdr.status == CTL_SUCCESS) { 2892 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2893 } else { 2894 /* 2895 * XXX: How to figure out what exactly went wrong? iSCSI spec 2896 * expects us to provide detailed error, e.g. "Task does 2897 * not exist" or "LUN does not exist". 2898 */ 2899 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2900 bhstmr2->bhstmr_response = 2901 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2902 } 2903 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2904 2905 ctl_free_io(io); 2906 icl_pdu_free(request); 2907 cfiscsi_pdu_queue(response); 2908} 2909 2910static void 2911cfiscsi_done(union ctl_io *io) 2912{ 2913 struct icl_pdu *request; 2914 struct cfiscsi_session *cs; 2915 2916 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2917 ("invalid CTL status %#x", io->io_hdr.status)); 2918 2919 if (io->io_hdr.io_type == CTL_IO_TASK && 2920 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2921 /* 2922 * Implicit task termination has just completed; nothing to do. 2923 */ 2924 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2925 cs->cs_tasks_aborted = true; 2926 refcount_release(&cs->cs_outstanding_ctl_pdus); 2927 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2928 ctl_free_io(io); 2929 return; 2930 } 2931 2932 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2933 cs = PDU_SESSION(request); 2934 refcount_release(&cs->cs_outstanding_ctl_pdus); 2935 2936 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2937 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2938 cfiscsi_scsi_command_done(io); 2939 break; 2940 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2941 cfiscsi_task_management_done(io); 2942 break; 2943 default: 2944 panic("cfiscsi_done called with wrong opcode 0x%x", 2945 request->ip_bhs->bhs_opcode); 2946 } 2947} 2948