ctl_frontend_iscsi.c revision 275881
1/*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 275881 2014-12-18 08:25:00Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 275881 2014-12-18 08:25:00Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capability.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include <dev/iscsi/icl.h> 71#include <dev/iscsi/iscsi_proto.h> 72#include <cam/ctl/ctl_frontend_iscsi.h> 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 1; 88TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95static int login_timeout = 60; 96TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99static int maxcmdsn_delta = 256; 100TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105#define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113#define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130#define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145#define PDU_EXPDATASN(X) (X)->ip_prv0 146#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147#define PDU_R2TSN(X) (X)->ip_prv2 148 149int cfiscsi_init(void); 150static void cfiscsi_online(void *arg); 151static void cfiscsi_offline(void *arg); 152static int cfiscsi_info(void *arg, struct sbuf *sb); 153static int cfiscsi_lun_enable(void *arg, 154 struct ctl_id target_id, int lun_id); 155static int cfiscsi_lun_disable(void *arg, 156 struct ctl_id target_id, int lun_id); 157static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 158static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160static void cfiscsi_datamove(union ctl_io *io); 161static void cfiscsi_datamove_in(union ctl_io *io); 162static void cfiscsi_datamove_out(union ctl_io *io); 163static void cfiscsi_done(union ctl_io *io); 164static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 165static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 168static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 169static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 170static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 171static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 172 *softc, const char *name); 173static struct cfiscsi_target *cfiscsi_target_find_or_create( 174 struct cfiscsi_softc *softc, const char *name, const char *alias); 175static void cfiscsi_target_release(struct cfiscsi_target *ct); 176static void cfiscsi_session_delete(struct cfiscsi_session *cs); 177 178static struct cfiscsi_softc cfiscsi_softc; 179extern struct ctl_softc *control_softc; 180 181static struct ctl_frontend cfiscsi_frontend = 182{ 183 .name = "iscsi", 184 .init = cfiscsi_init, 185 .ioctl = cfiscsi_ioctl, 186}; 187CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 188MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 189 190static struct icl_pdu * 191cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 192{ 193 194 return (icl_pdu_new_bhs(request->ip_conn, flags)); 195} 196 197static bool 198cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 199{ 200 const struct iscsi_bhs_scsi_command *bhssc; 201 struct cfiscsi_session *cs; 202 uint32_t cmdsn, expstatsn; 203 204 cs = PDU_SESSION(request); 205 206 /* 207 * Every incoming PDU - not just NOP-Out - resets the ping timer. 208 * The purpose of the timeout is to reset the connection when it stalls; 209 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 210 * in some queue. 211 * 212 * XXX: Locking? 213 */ 214 cs->cs_timeout = 0; 215 216 /* 217 * Data-Out PDUs don't contain CmdSN. 218 */ 219 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 220 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 221 return (false); 222 223 /* 224 * We're only using fields common for all the request 225 * (initiator -> target) PDUs. 226 */ 227 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 228 cmdsn = ntohl(bhssc->bhssc_cmdsn); 229 expstatsn = ntohl(bhssc->bhssc_expstatsn); 230 231 CFISCSI_SESSION_LOCK(cs); 232#if 0 233 if (expstatsn != cs->cs_statsn) { 234 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 235 "while current StatSN is %d", expstatsn, 236 cs->cs_statsn); 237 } 238#endif 239 240 /* 241 * The target MUST silently ignore any non-immediate command outside 242 * of this range. 243 */ 244 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 245 CFISCSI_SESSION_UNLOCK(cs); 246 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 247 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 248 return (true); 249 } 250 251 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 252 cs->cs_cmdsn++; 253 254 CFISCSI_SESSION_UNLOCK(cs); 255 256 return (false); 257} 258 259static void 260cfiscsi_pdu_handle(struct icl_pdu *request) 261{ 262 struct cfiscsi_session *cs; 263 bool ignore; 264 265 cs = PDU_SESSION(request); 266 267 ignore = cfiscsi_pdu_update_cmdsn(request); 268 if (ignore) { 269 icl_pdu_free(request); 270 return; 271 } 272 273 /* 274 * Handle the PDU; this includes e.g. receiving the remaining 275 * part of PDU and submitting the SCSI command to CTL 276 * or queueing a reply. The handling routine is responsible 277 * for freeing the PDU when it's no longer needed. 278 */ 279 switch (request->ip_bhs->bhs_opcode & 280 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 281 case ISCSI_BHS_OPCODE_NOP_OUT: 282 cfiscsi_pdu_handle_nop_out(request); 283 break; 284 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 285 cfiscsi_pdu_handle_scsi_command(request); 286 break; 287 case ISCSI_BHS_OPCODE_TASK_REQUEST: 288 cfiscsi_pdu_handle_task_request(request); 289 break; 290 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 291 cfiscsi_pdu_handle_data_out(request); 292 break; 293 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 294 cfiscsi_pdu_handle_logout_request(request); 295 break; 296 default: 297 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 298 "opcode 0x%x; dropping connection", 299 request->ip_bhs->bhs_opcode); 300 icl_pdu_free(request); 301 cfiscsi_session_terminate(cs); 302 } 303 304} 305 306static void 307cfiscsi_receive_callback(struct icl_pdu *request) 308{ 309 struct cfiscsi_session *cs; 310 311 cs = PDU_SESSION(request); 312 313#ifdef ICL_KERNEL_PROXY 314 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 315 if (cs->cs_login_pdu == NULL) 316 cs->cs_login_pdu = request; 317 else 318 icl_pdu_free(request); 319 cv_signal(&cs->cs_login_cv); 320 return; 321 } 322#endif 323 324 cfiscsi_pdu_handle(request); 325} 326 327static void 328cfiscsi_error_callback(struct icl_conn *ic) 329{ 330 struct cfiscsi_session *cs; 331 332 cs = CONN_SESSION(ic); 333 334 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 335 cfiscsi_session_terminate(cs); 336} 337 338static int 339cfiscsi_pdu_prepare(struct icl_pdu *response) 340{ 341 struct cfiscsi_session *cs; 342 struct iscsi_bhs_scsi_response *bhssr; 343 bool advance_statsn = true; 344 345 cs = PDU_SESSION(response); 346 347 CFISCSI_SESSION_LOCK_ASSERT(cs); 348 349 /* 350 * We're only using fields common for all the response 351 * (target -> initiator) PDUs. 352 */ 353 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 354 355 /* 356 * 10.8.3: "The StatSN for this connection is not advanced 357 * after this PDU is sent." 358 */ 359 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 360 advance_statsn = false; 361 362 /* 363 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 364 * StatSN for the connection is not advanced after this PDU is sent." 365 */ 366 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 367 bhssr->bhssr_initiator_task_tag == 0xffffffff) 368 advance_statsn = false; 369 370 /* 371 * See the comment below - StatSN is not meaningful and must 372 * not be advanced. 373 */ 374 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 375 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 376 advance_statsn = false; 377 378 /* 379 * 10.7.3: "The fields StatSN, Status, and Residual Count 380 * only have meaningful content if the S bit is set to 1." 381 */ 382 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 383 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 384 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 385 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 386 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 387 388 if (advance_statsn) 389 cs->cs_statsn++; 390 391 return (0); 392} 393 394static void 395cfiscsi_pdu_queue(struct icl_pdu *response) 396{ 397 struct cfiscsi_session *cs; 398 399 cs = PDU_SESSION(response); 400 401 CFISCSI_SESSION_LOCK(cs); 402 cfiscsi_pdu_prepare(response); 403 icl_pdu_queue(response); 404 CFISCSI_SESSION_UNLOCK(cs); 405} 406 407static uint32_t 408cfiscsi_decode_lun(uint64_t encoded) 409{ 410 uint8_t lun[8]; 411 uint32_t result; 412 413 /* 414 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 415 * but is in fact an evil, multidimensional structure defined 416 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 417 */ 418 memcpy(lun, &encoded, sizeof(lun)); 419 switch (lun[0] & 0xC0) { 420 case 0x00: 421 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 422 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 423 CFISCSI_WARN("malformed LUN " 424 "(peripheral device addressing method): 0x%jx", 425 (uintmax_t)encoded); 426 result = 0xffffffff; 427 break; 428 } 429 result = lun[1]; 430 break; 431 case 0x40: 432 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 433 lun[6] != 0 || lun[7] != 0) { 434 CFISCSI_WARN("malformed LUN " 435 "(flat address space addressing method): 0x%jx", 436 (uintmax_t)encoded); 437 result = 0xffffffff; 438 break; 439 } 440 result = ((lun[0] & 0x3f) << 8) + lun[1]; 441 break; 442 case 0xC0: 443 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 444 lun[6] != 0 || lun[7] != 0) { 445 CFISCSI_WARN("malformed LUN (extended flat " 446 "address space addressing method): 0x%jx", 447 (uintmax_t)encoded); 448 result = 0xffffffff; 449 break; 450 } 451 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 452 default: 453 CFISCSI_WARN("unsupported LUN format 0x%jx", 454 (uintmax_t)encoded); 455 result = 0xffffffff; 456 break; 457 } 458 459 return (result); 460} 461 462static void 463cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 464{ 465 struct cfiscsi_session *cs; 466 struct iscsi_bhs_nop_out *bhsno; 467 struct iscsi_bhs_nop_in *bhsni; 468 struct icl_pdu *response; 469 void *data = NULL; 470 size_t datasize; 471 int error; 472 473 cs = PDU_SESSION(request); 474 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 475 476 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 477 /* 478 * Nothing to do, iscsi_pdu_update_statsn() already 479 * zeroed the timeout. 480 */ 481 icl_pdu_free(request); 482 return; 483 } 484 485 datasize = icl_pdu_data_segment_length(request); 486 if (datasize > 0) { 487 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 488 if (data == NULL) { 489 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 490 "dropping connection"); 491 icl_pdu_free(request); 492 cfiscsi_session_terminate(cs); 493 return; 494 } 495 icl_pdu_get_data(request, 0, data, datasize); 496 } 497 498 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 499 if (response == NULL) { 500 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 501 "droppping connection"); 502 free(data, M_CFISCSI); 503 icl_pdu_free(request); 504 cfiscsi_session_terminate(cs); 505 return; 506 } 507 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 508 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 509 bhsni->bhsni_flags = 0x80; 510 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 511 bhsni->bhsni_target_transfer_tag = 0xffffffff; 512 if (datasize > 0) { 513 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 514 if (error != 0) { 515 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 516 "dropping connection"); 517 free(data, M_CFISCSI); 518 icl_pdu_free(request); 519 icl_pdu_free(response); 520 cfiscsi_session_terminate(cs); 521 return; 522 } 523 free(data, M_CFISCSI); 524 } 525 526 icl_pdu_free(request); 527 cfiscsi_pdu_queue(response); 528} 529 530static void 531cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 532{ 533 struct iscsi_bhs_scsi_command *bhssc; 534 struct cfiscsi_session *cs; 535 union ctl_io *io; 536 int error; 537 538 cs = PDU_SESSION(request); 539 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 540 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 541 // bhssc->bhssc_initiator_task_tag); 542 543 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 544 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 545 "ImmediateData=No; dropping connection"); 546 icl_pdu_free(request); 547 cfiscsi_session_terminate(cs); 548 return; 549 } 550 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 551 ctl_zero_io(io); 552 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 553 io->io_hdr.io_type = CTL_IO_SCSI; 554 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 555 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 556 io->io_hdr.nexus.targ_target.id = 0; 557 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 558 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 559 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 560 case BHSSC_FLAGS_ATTR_UNTAGGED: 561 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 562 break; 563 case BHSSC_FLAGS_ATTR_SIMPLE: 564 io->scsiio.tag_type = CTL_TAG_SIMPLE; 565 break; 566 case BHSSC_FLAGS_ATTR_ORDERED: 567 io->scsiio.tag_type = CTL_TAG_ORDERED; 568 break; 569 case BHSSC_FLAGS_ATTR_HOQ: 570 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 571 break; 572 case BHSSC_FLAGS_ATTR_ACA: 573 io->scsiio.tag_type = CTL_TAG_ACA; 574 break; 575 default: 576 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 577 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 578 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 579 break; 580 } 581 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 582 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 583 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 584 error = ctl_queue(io); 585 if (error != CTL_RETVAL_COMPLETE) { 586 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 587 "dropping connection", error); 588 ctl_free_io(io); 589 refcount_release(&cs->cs_outstanding_ctl_pdus); 590 icl_pdu_free(request); 591 cfiscsi_session_terminate(cs); 592 } 593} 594 595static void 596cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 597{ 598 struct iscsi_bhs_task_management_request *bhstmr; 599 struct iscsi_bhs_task_management_response *bhstmr2; 600 struct icl_pdu *response; 601 struct cfiscsi_session *cs; 602 union ctl_io *io; 603 int error; 604 605 cs = PDU_SESSION(request); 606 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 607 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 608 ctl_zero_io(io); 609 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 610 io->io_hdr.io_type = CTL_IO_TASK; 611 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 612 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 613 io->io_hdr.nexus.targ_target.id = 0; 614 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 615 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 616 617 switch (bhstmr->bhstmr_function & ~0x80) { 618 case BHSTMR_FUNCTION_ABORT_TASK: 619#if 0 620 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 621#endif 622 io->taskio.task_action = CTL_TASK_ABORT_TASK; 623 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 624 break; 625 case BHSTMR_FUNCTION_ABORT_TASK_SET: 626#if 0 627 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 628#endif 629 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 630 break; 631 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 632#if 0 633 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 634#endif 635 io->taskio.task_action = CTL_TASK_LUN_RESET; 636 break; 637 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 638#if 0 639 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 640#endif 641 io->taskio.task_action = CTL_TASK_TARGET_RESET; 642 break; 643 default: 644 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 645 bhstmr->bhstmr_function & ~0x80); 646 ctl_free_io(io); 647 648 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 649 if (response == NULL) { 650 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 651 "dropping connection"); 652 icl_pdu_free(request); 653 cfiscsi_session_terminate(cs); 654 return; 655 } 656 bhstmr2 = (struct iscsi_bhs_task_management_response *) 657 response->ip_bhs; 658 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 659 bhstmr2->bhstmr_flags = 0x80; 660 bhstmr2->bhstmr_response = 661 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 662 bhstmr2->bhstmr_initiator_task_tag = 663 bhstmr->bhstmr_initiator_task_tag; 664 icl_pdu_free(request); 665 cfiscsi_pdu_queue(response); 666 return; 667 } 668 669 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 670 error = ctl_queue(io); 671 if (error != CTL_RETVAL_COMPLETE) { 672 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 673 "dropping connection", error); 674 ctl_free_io(io); 675 refcount_release(&cs->cs_outstanding_ctl_pdus); 676 icl_pdu_free(request); 677 cfiscsi_session_terminate(cs); 678 } 679} 680 681static bool 682cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 683{ 684 struct iscsi_bhs_data_out *bhsdo; 685 struct cfiscsi_session *cs; 686 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 687 size_t copy_len, len, off, buffer_offset; 688 int ctl_sg_count; 689 union ctl_io *io; 690 691 cs = PDU_SESSION(request); 692 693 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 694 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 695 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 696 ISCSI_BHS_OPCODE_SCSI_COMMAND, 697 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 698 699 /* 700 * We're only using fields common for Data-Out and SCSI Command PDUs. 701 */ 702 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 703 704 io = cdw->cdw_ctl_io; 705 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 706 ("CTL_FLAG_DATA_IN")); 707 708#if 0 709 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 710 request->ip_data_len, io->scsiio.kern_total_len); 711#endif 712 713 if (io->scsiio.kern_sg_entries > 0) { 714 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 715 ctl_sg_count = io->scsiio.kern_sg_entries; 716 } else { 717 ctl_sglist = &ctl_sg_entry; 718 ctl_sglist->addr = io->scsiio.kern_data_ptr; 719 ctl_sglist->len = io->scsiio.kern_data_len; 720 ctl_sg_count = 1; 721 } 722 723 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 724 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 725 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 726 else 727 buffer_offset = 0; 728 len = icl_pdu_data_segment_length(request); 729 730 /* 731 * Make sure the offset, as sent by the initiator, matches the offset 732 * we're supposed to be at in the scatter-gather list. 733 */ 734 if (buffer_offset > 735 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 736 buffer_offset + len <= 737 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 738 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 739 "expected %zd; dropping connection", buffer_offset, 740 (size_t)io->scsiio.kern_rel_offset + 741 (size_t)io->scsiio.ext_data_filled); 742 ctl_set_data_phase_error(&io->scsiio); 743 cfiscsi_session_terminate(cs); 744 return (true); 745 } 746 747 /* 748 * This is the offset within the PDU data segment, as opposed 749 * to buffer_offset, which is the offset within the task (SCSI 750 * command). 751 */ 752 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 753 buffer_offset; 754 755 /* 756 * Iterate over the scatter/gather segments, filling them with data 757 * from the PDU data segment. Note that this can get called multiple 758 * times for one SCSI command; the cdw structure holds state for the 759 * scatter/gather list. 760 */ 761 for (;;) { 762 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 763 ("cdw->cdw_sg_index >= ctl_sg_count")); 764 if (cdw->cdw_sg_len == 0) { 765 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 766 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 767 } 768 KASSERT(off <= len, ("len > off")); 769 copy_len = len - off; 770 if (copy_len > cdw->cdw_sg_len) 771 copy_len = cdw->cdw_sg_len; 772 773 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 774 cdw->cdw_sg_addr += copy_len; 775 cdw->cdw_sg_len -= copy_len; 776 off += copy_len; 777 io->scsiio.ext_data_filled += copy_len; 778 779 if (cdw->cdw_sg_len == 0) { 780 /* 781 * End of current segment. 782 */ 783 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 784 /* 785 * Last segment in scatter/gather list. 786 */ 787 break; 788 } 789 cdw->cdw_sg_index++; 790 } 791 792 if (off == len) { 793 /* 794 * End of PDU payload. 795 */ 796 break; 797 } 798 } 799 800 if (len > off) { 801 /* 802 * In case of unsolicited data, it's possible that the buffer 803 * provided by CTL is smaller than negotiated FirstBurstLength. 804 * Just ignore the superfluous data; will ask for them with R2T 805 * on next call to cfiscsi_datamove(). 806 * 807 * This obviously can only happen with SCSI Command PDU. 808 */ 809 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 810 ISCSI_BHS_OPCODE_SCSI_COMMAND) 811 return (true); 812 813 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 814 "expected %zd; dropping connection", 815 icl_pdu_data_segment_length(request), off); 816 ctl_set_data_phase_error(&io->scsiio); 817 cfiscsi_session_terminate(cs); 818 return (true); 819 } 820 821 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 822 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 823 CFISCSI_SESSION_WARN(cs, "got the final packet without " 824 "the F flag; flags = 0x%x; dropping connection", 825 bhsdo->bhsdo_flags); 826 ctl_set_data_phase_error(&io->scsiio); 827 cfiscsi_session_terminate(cs); 828 return (true); 829 } 830 831 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 832 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 833 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 834 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 835 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 836 "transmitted size was %zd bytes instead of %d; " 837 "dropping connection", 838 (size_t)io->scsiio.ext_data_filled, 839 cdw->cdw_r2t_end); 840 ctl_set_data_phase_error(&io->scsiio); 841 cfiscsi_session_terminate(cs); 842 return (true); 843 } else { 844 /* 845 * For SCSI Command PDU, this just means we need to 846 * solicit more data by sending R2T. 847 */ 848 return (false); 849 } 850 } 851 852 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 853#if 0 854 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 855 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 856#endif 857 858 return (true); 859 } 860 861 return (false); 862} 863 864static void 865cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 866{ 867 struct iscsi_bhs_data_out *bhsdo; 868 struct cfiscsi_session *cs; 869 struct cfiscsi_data_wait *cdw = NULL; 870 union ctl_io *io; 871 bool done; 872 873 cs = PDU_SESSION(request); 874 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 875 876 CFISCSI_SESSION_LOCK(cs); 877 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 878#if 0 879 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 880 "ttt 0x%x, itt 0x%x", 881 bhsdo->bhsdo_target_transfer_tag, 882 bhsdo->bhsdo_initiator_task_tag, 883 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 884#endif 885 if (bhsdo->bhsdo_target_transfer_tag == 886 cdw->cdw_target_transfer_tag) 887 break; 888 } 889 CFISCSI_SESSION_UNLOCK(cs); 890 if (cdw == NULL) { 891 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 892 "0x%x, not found; dropping connection", 893 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 894 icl_pdu_free(request); 895 cfiscsi_session_terminate(cs); 896 return; 897 } 898 899 io = cdw->cdw_ctl_io; 900 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 901 ("CTL_FLAG_DATA_IN")); 902 903 done = cfiscsi_handle_data_segment(request, cdw); 904 if (done) { 905 CFISCSI_SESSION_LOCK(cs); 906 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 907 CFISCSI_SESSION_UNLOCK(cs); 908 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 909 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 910 uma_zfree(cfiscsi_data_wait_zone, cdw); 911 if (done) 912 io->scsiio.be_move_done(io); 913 else 914 cfiscsi_datamove_out(io); 915 } 916 917 icl_pdu_free(request); 918} 919 920static void 921cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 922{ 923 struct iscsi_bhs_logout_request *bhslr; 924 struct iscsi_bhs_logout_response *bhslr2; 925 struct icl_pdu *response; 926 struct cfiscsi_session *cs; 927 928 cs = PDU_SESSION(request); 929 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 930 switch (bhslr->bhslr_reason & 0x7f) { 931 case BHSLR_REASON_CLOSE_SESSION: 932 case BHSLR_REASON_CLOSE_CONNECTION: 933 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 934 if (response == NULL) { 935 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 936 icl_pdu_free(request); 937 cfiscsi_session_terminate(cs); 938 return; 939 } 940 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 941 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 942 bhslr2->bhslr_flags = 0x80; 943 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 944 bhslr2->bhslr_initiator_task_tag = 945 bhslr->bhslr_initiator_task_tag; 946 icl_pdu_free(request); 947 cfiscsi_pdu_queue(response); 948 cfiscsi_session_terminate(cs); 949 break; 950 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 951 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 952 if (response == NULL) { 953 CFISCSI_SESSION_WARN(cs, 954 "failed to allocate memory; dropping connection"); 955 icl_pdu_free(request); 956 cfiscsi_session_terminate(cs); 957 return; 958 } 959 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 960 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 961 bhslr2->bhslr_flags = 0x80; 962 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 963 bhslr2->bhslr_initiator_task_tag = 964 bhslr->bhslr_initiator_task_tag; 965 icl_pdu_free(request); 966 cfiscsi_pdu_queue(response); 967 break; 968 default: 969 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 970 bhslr->bhslr_reason); 971 icl_pdu_free(request); 972 cfiscsi_session_terminate(cs); 973 break; 974 } 975} 976 977static void 978cfiscsi_callout(void *context) 979{ 980 struct icl_pdu *cp; 981 struct iscsi_bhs_nop_in *bhsni; 982 struct cfiscsi_session *cs; 983 984 cs = context; 985 986 if (cs->cs_terminating) 987 return; 988 989 callout_schedule(&cs->cs_callout, 1 * hz); 990 991 atomic_add_int(&cs->cs_timeout, 1); 992 993#ifdef ICL_KERNEL_PROXY 994 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 995 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 996 CFISCSI_SESSION_WARN(cs, "login timed out after " 997 "%d seconds; dropping connection", cs->cs_timeout); 998 cfiscsi_session_terminate(cs); 999 } 1000 return; 1001 } 1002#endif 1003 1004 if (ping_timeout <= 0) { 1005 /* 1006 * Pings are disabled. Don't send NOP-In in this case; 1007 * user might have disabled pings to work around problems 1008 * with certain initiators that can't properly handle 1009 * NOP-In, such as iPXE. Reset the timeout, to avoid 1010 * triggering reconnection, should the user decide to 1011 * reenable them. 1012 */ 1013 cs->cs_timeout = 0; 1014 return; 1015 } 1016 1017 if (cs->cs_timeout >= ping_timeout) { 1018 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1019 "dropping connection", ping_timeout); 1020 cfiscsi_session_terminate(cs); 1021 return; 1022 } 1023 1024 /* 1025 * If the ping was reset less than one second ago - which means 1026 * that we've received some PDU during the last second - assume 1027 * the traffic flows correctly and don't bother sending a NOP-Out. 1028 * 1029 * (It's 2 - one for one second, and one for incrementing is_timeout 1030 * earlier in this routine.) 1031 */ 1032 if (cs->cs_timeout < 2) 1033 return; 1034 1035 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1036 if (cp == NULL) { 1037 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1038 return; 1039 } 1040 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1041 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1042 bhsni->bhsni_flags = 0x80; 1043 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1044 1045 cfiscsi_pdu_queue(cp); 1046} 1047 1048static void 1049cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1050{ 1051 struct cfiscsi_data_wait *cdw; 1052 union ctl_io *io; 1053 int error, last, wait; 1054 1055 if (cs->cs_target == NULL) 1056 return; /* No target yet, so nothing to do. */ 1057 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1058 ctl_zero_io(io); 1059 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1060 io->io_hdr.io_type = CTL_IO_TASK; 1061 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1062 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1063 io->io_hdr.nexus.targ_target.id = 0; 1064 io->io_hdr.nexus.targ_lun = 0; 1065 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1066 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1067 wait = cs->cs_outstanding_ctl_pdus; 1068 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1069 error = ctl_queue(io); 1070 if (error != CTL_RETVAL_COMPLETE) { 1071 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1072 refcount_release(&cs->cs_outstanding_ctl_pdus); 1073 ctl_free_io(io); 1074 } 1075 1076 CFISCSI_SESSION_LOCK(cs); 1077 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1078 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1079 CFISCSI_SESSION_UNLOCK(cs); 1080 /* 1081 * Set nonzero port status; this prevents backends from 1082 * assuming that the data transfer actually succeeded 1083 * and writing uninitialized data to disk. 1084 */ 1085 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1086 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1087 uma_zfree(cfiscsi_data_wait_zone, cdw); 1088 CFISCSI_SESSION_LOCK(cs); 1089 } 1090 CFISCSI_SESSION_UNLOCK(cs); 1091 1092 /* 1093 * Wait for CTL to terminate all the tasks. 1094 */ 1095 if (wait > 0) 1096 CFISCSI_SESSION_WARN(cs, 1097 "waiting for CTL to terminate %d tasks", wait); 1098 for (;;) { 1099 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1100 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1101 if (last != 0) 1102 break; 1103 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1104 0, "cfiscsi_terminate", hz / 100); 1105 } 1106 if (wait > 0) 1107 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1108} 1109 1110static void 1111cfiscsi_maintenance_thread(void *arg) 1112{ 1113 struct cfiscsi_session *cs; 1114 1115 cs = arg; 1116 1117 for (;;) { 1118 CFISCSI_SESSION_LOCK(cs); 1119 if (cs->cs_terminating == false) 1120 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1121 CFISCSI_SESSION_UNLOCK(cs); 1122 1123 if (cs->cs_terminating) { 1124 1125 /* 1126 * We used to wait up to 30 seconds to deliver queued 1127 * PDUs to the initiator. We also tried hard to deliver 1128 * SCSI Responses for the aborted PDUs. We don't do 1129 * that anymore. We might need to revisit that. 1130 */ 1131 callout_drain(&cs->cs_callout); 1132 icl_conn_close(cs->cs_conn); 1133 1134 /* 1135 * At this point ICL receive thread is no longer 1136 * running; no new tasks can be queued. 1137 */ 1138 cfiscsi_session_terminate_tasks(cs); 1139 cfiscsi_session_delete(cs); 1140 kthread_exit(); 1141 return; 1142 } 1143 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1144 } 1145} 1146 1147static void 1148cfiscsi_session_terminate(struct cfiscsi_session *cs) 1149{ 1150 1151 if (cs->cs_terminating) 1152 return; 1153 cs->cs_terminating = true; 1154 cv_signal(&cs->cs_maintenance_cv); 1155#ifdef ICL_KERNEL_PROXY 1156 cv_signal(&cs->cs_login_cv); 1157#endif 1158} 1159 1160static int 1161cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1162{ 1163 struct cfiscsi_target *ct; 1164 char *name; 1165 int i; 1166 1167 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1168 1169 ct = cs->cs_target; 1170 name = strdup(cs->cs_initiator_id, M_CTL); 1171 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1172 if (i < 0) { 1173 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1174 i); 1175 cs->cs_ctl_initid = -1; 1176 return (1); 1177 } 1178 cs->cs_ctl_initid = i; 1179#if 0 1180 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1181#endif 1182 1183 return (0); 1184} 1185 1186static void 1187cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1188{ 1189 int error; 1190 1191 if (cs->cs_ctl_initid == -1) 1192 return; 1193 1194 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1195 if (error != 0) { 1196 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1197 error); 1198 } 1199 cs->cs_ctl_initid = -1; 1200} 1201 1202static struct cfiscsi_session * 1203cfiscsi_session_new(struct cfiscsi_softc *softc) 1204{ 1205 struct cfiscsi_session *cs; 1206 int error; 1207 1208 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1209 if (cs == NULL) { 1210 CFISCSI_WARN("malloc failed"); 1211 return (NULL); 1212 } 1213 cs->cs_ctl_initid = -1; 1214 1215 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1216 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1217 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1218 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1219#ifdef ICL_KERNEL_PROXY 1220 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1221#endif 1222 1223 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1224 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1225 cs->cs_conn->ic_error = cfiscsi_error_callback; 1226 cs->cs_conn->ic_prv0 = cs; 1227 1228 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1229 if (error != 0) { 1230 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1231 free(cs, M_CFISCSI); 1232 return (NULL); 1233 } 1234 1235 mtx_lock(&softc->lock); 1236 cs->cs_id = ++softc->last_session_id; 1237 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1238 mtx_unlock(&softc->lock); 1239 1240 /* 1241 * Start pinging the initiator. 1242 */ 1243 callout_init(&cs->cs_callout, 1); 1244 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1245 1246 return (cs); 1247} 1248 1249static void 1250cfiscsi_session_delete(struct cfiscsi_session *cs) 1251{ 1252 struct cfiscsi_softc *softc; 1253 1254 softc = &cfiscsi_softc; 1255 1256 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1257 ("destroying session with outstanding CTL pdus")); 1258 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1259 ("destroying session with non-empty queue")); 1260 1261 cfiscsi_session_unregister_initiator(cs); 1262 if (cs->cs_target != NULL) 1263 cfiscsi_target_release(cs->cs_target); 1264 icl_conn_close(cs->cs_conn); 1265 icl_conn_free(cs->cs_conn); 1266 1267 mtx_lock(&softc->lock); 1268 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1269 cv_signal(&softc->sessions_cv); 1270 mtx_unlock(&softc->lock); 1271 1272 free(cs, M_CFISCSI); 1273} 1274 1275int 1276cfiscsi_init(void) 1277{ 1278 struct cfiscsi_softc *softc; 1279 int retval; 1280 1281 softc = &cfiscsi_softc; 1282 retval = 0; 1283 bzero(softc, sizeof(*softc)); 1284 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1285 1286 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1287#ifdef ICL_KERNEL_PROXY 1288 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1289#endif 1290 TAILQ_INIT(&softc->sessions); 1291 TAILQ_INIT(&softc->targets); 1292 1293 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1294 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1295 UMA_ALIGN_PTR, 0); 1296 1297 return (0); 1298} 1299 1300#ifdef ICL_KERNEL_PROXY 1301static void 1302cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1303{ 1304 struct cfiscsi_session *cs; 1305 1306 cs = cfiscsi_session_new(&cfiscsi_softc); 1307 if (cs == NULL) { 1308 CFISCSI_WARN("failed to create session"); 1309 return; 1310 } 1311 1312 icl_conn_handoff_sock(cs->cs_conn, so); 1313 cs->cs_initiator_sa = sa; 1314 cs->cs_portal_id = portal_id; 1315 cs->cs_waiting_for_ctld = true; 1316 cv_signal(&cfiscsi_softc.accept_cv); 1317} 1318#endif 1319 1320static void 1321cfiscsi_online(void *arg) 1322{ 1323 struct cfiscsi_softc *softc; 1324 struct cfiscsi_target *ct; 1325 int online; 1326 1327 ct = (struct cfiscsi_target *)arg; 1328 softc = ct->ct_softc; 1329 1330 mtx_lock(&softc->lock); 1331 if (ct->ct_online) { 1332 mtx_unlock(&softc->lock); 1333 return; 1334 } 1335 ct->ct_online = 1; 1336 online = softc->online++; 1337 mtx_unlock(&softc->lock); 1338 if (online > 0) 1339 return; 1340 1341#ifdef ICL_KERNEL_PROXY 1342 if (softc->listener != NULL) 1343 icl_listen_free(softc->listener); 1344 softc->listener = icl_listen_new(cfiscsi_accept); 1345#endif 1346} 1347 1348static void 1349cfiscsi_offline(void *arg) 1350{ 1351 struct cfiscsi_softc *softc; 1352 struct cfiscsi_target *ct; 1353 struct cfiscsi_session *cs; 1354 int online; 1355 1356 ct = (struct cfiscsi_target *)arg; 1357 softc = ct->ct_softc; 1358 1359 mtx_lock(&softc->lock); 1360 if (!ct->ct_online) { 1361 mtx_unlock(&softc->lock); 1362 return; 1363 } 1364 ct->ct_online = 0; 1365 online = --softc->online; 1366 1367 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1368 if (cs->cs_target == ct) 1369 cfiscsi_session_terminate(cs); 1370 } 1371 do { 1372 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1373 if (cs->cs_target == ct) 1374 break; 1375 } 1376 if (cs != NULL) 1377 cv_wait(&softc->sessions_cv, &softc->lock); 1378 } while (cs != NULL && ct->ct_online == 0); 1379 mtx_unlock(&softc->lock); 1380 if (online > 0) 1381 return; 1382 1383#ifdef ICL_KERNEL_PROXY 1384 icl_listen_free(softc->listener); 1385 softc->listener = NULL; 1386#endif 1387} 1388 1389static int 1390cfiscsi_info(void *arg, struct sbuf *sb) 1391{ 1392 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1393 int retval; 1394 1395 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1396 ct->ct_state); 1397 return (retval); 1398} 1399 1400static void 1401cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1402{ 1403 struct cfiscsi_softc *softc; 1404 struct cfiscsi_session *cs, *cs2; 1405 struct cfiscsi_target *ct; 1406 struct ctl_iscsi_handoff_params *cihp; 1407 int error; 1408 1409 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1410 softc = &cfiscsi_softc; 1411 1412 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1413 cihp->initiator_name, cihp->initiator_addr, 1414 cihp->target_name); 1415 1416 ct = cfiscsi_target_find(softc, cihp->target_name); 1417 if (ct == NULL) { 1418 ci->status = CTL_ISCSI_ERROR; 1419 snprintf(ci->error_str, sizeof(ci->error_str), 1420 "%s: target not found", __func__); 1421 return; 1422 } 1423 1424#ifdef ICL_KERNEL_PROXY 1425 if (cihp->socket > 0 && cihp->connection_id > 0) { 1426 snprintf(ci->error_str, sizeof(ci->error_str), 1427 "both socket and connection_id set"); 1428 ci->status = CTL_ISCSI_ERROR; 1429 cfiscsi_target_release(ct); 1430 return; 1431 } 1432 if (cihp->socket == 0) { 1433 mtx_lock(&cfiscsi_softc.lock); 1434 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1435 if (cs->cs_id == cihp->connection_id) 1436 break; 1437 } 1438 if (cs == NULL) { 1439 mtx_unlock(&cfiscsi_softc.lock); 1440 snprintf(ci->error_str, sizeof(ci->error_str), 1441 "connection not found"); 1442 ci->status = CTL_ISCSI_ERROR; 1443 cfiscsi_target_release(ct); 1444 return; 1445 } 1446 mtx_unlock(&cfiscsi_softc.lock); 1447 } else { 1448#endif 1449 cs = cfiscsi_session_new(softc); 1450 if (cs == NULL) { 1451 ci->status = CTL_ISCSI_ERROR; 1452 snprintf(ci->error_str, sizeof(ci->error_str), 1453 "%s: cfiscsi_session_new failed", __func__); 1454 cfiscsi_target_release(ct); 1455 return; 1456 } 1457#ifdef ICL_KERNEL_PROXY 1458 } 1459#endif 1460 1461 /* 1462 * First PDU of Full Feature phase has the same CmdSN as the last 1463 * PDU from the Login Phase received from the initiator. Thus, 1464 * the -1 below. 1465 */ 1466 cs->cs_portal_group_tag = cihp->portal_group_tag; 1467 cs->cs_cmdsn = cihp->cmdsn; 1468 cs->cs_statsn = cihp->statsn; 1469 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1470 cs->cs_max_burst_length = cihp->max_burst_length; 1471 cs->cs_immediate_data = !!cihp->immediate_data; 1472 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1473 cs->cs_conn->ic_header_crc32c = true; 1474 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1475 cs->cs_conn->ic_data_crc32c = true; 1476 1477 strlcpy(cs->cs_initiator_name, 1478 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1479 strlcpy(cs->cs_initiator_addr, 1480 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1481 strlcpy(cs->cs_initiator_alias, 1482 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1483 memcpy(cs->cs_initiator_isid, 1484 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1485 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1486 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1487 cihp->initiator_isid[0], cihp->initiator_isid[1], 1488 cihp->initiator_isid[2], cihp->initiator_isid[3], 1489 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1490 1491 mtx_lock(&softc->lock); 1492 if (ct->ct_online == 0) { 1493 mtx_unlock(&softc->lock); 1494 cfiscsi_session_terminate(cs); 1495 cfiscsi_target_release(ct); 1496 ci->status = CTL_ISCSI_ERROR; 1497 snprintf(ci->error_str, sizeof(ci->error_str), 1498 "%s: port offline", __func__); 1499 return; 1500 } 1501 cs->cs_target = ct; 1502 mtx_unlock(&softc->lock); 1503 1504 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1505restart: 1506 if (!cs->cs_terminating) { 1507 mtx_lock(&softc->lock); 1508 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1509 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1510 cs->cs_target == cs2->cs_target && 1511 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1512 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1513 cfiscsi_session_terminate(cs2); 1514 mtx_unlock(&softc->lock); 1515 pause("cfiscsi_reinstate", 1); 1516 goto restart; 1517 } 1518 } 1519 mtx_unlock(&softc->lock); 1520 } 1521 1522 /* 1523 * Register initiator with CTL. 1524 */ 1525 cfiscsi_session_register_initiator(cs); 1526 1527#ifdef ICL_KERNEL_PROXY 1528 if (cihp->socket > 0) { 1529#endif 1530 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1531 if (error != 0) { 1532 cfiscsi_session_terminate(cs); 1533 refcount_release(&cs->cs_outstanding_ctl_pdus); 1534 ci->status = CTL_ISCSI_ERROR; 1535 snprintf(ci->error_str, sizeof(ci->error_str), 1536 "%s: icl_conn_handoff failed with error %d", 1537 __func__, error); 1538 return; 1539 } 1540#ifdef ICL_KERNEL_PROXY 1541 } 1542#endif 1543 1544#ifdef ICL_KERNEL_PROXY 1545 cs->cs_login_phase = false; 1546 1547 /* 1548 * First PDU of the Full Feature phase has likely already arrived. 1549 * We have to pick it up and execute properly. 1550 */ 1551 if (cs->cs_login_pdu != NULL) { 1552 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1553 cfiscsi_pdu_handle(cs->cs_login_pdu); 1554 cs->cs_login_pdu = NULL; 1555 } 1556#endif 1557 1558 refcount_release(&cs->cs_outstanding_ctl_pdus); 1559 ci->status = CTL_ISCSI_OK; 1560} 1561 1562static void 1563cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1564{ 1565 struct ctl_iscsi_list_params *cilp; 1566 struct cfiscsi_session *cs; 1567 struct cfiscsi_softc *softc; 1568 struct sbuf *sb; 1569 int error; 1570 1571 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1572 softc = &cfiscsi_softc; 1573 1574 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1575 if (sb == NULL) { 1576 ci->status = CTL_ISCSI_ERROR; 1577 snprintf(ci->error_str, sizeof(ci->error_str), 1578 "Unable to allocate %d bytes for iSCSI session list", 1579 cilp->alloc_len); 1580 return; 1581 } 1582 1583 sbuf_printf(sb, "<ctlislist>\n"); 1584 mtx_lock(&softc->lock); 1585 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1586#ifdef ICL_KERNEL_PROXY 1587 if (cs->cs_target == NULL) 1588 continue; 1589#endif 1590 error = sbuf_printf(sb, "<connection id=\"%d\">" 1591 "<initiator>%s</initiator>" 1592 "<initiator_addr>%s</initiator_addr>" 1593 "<initiator_alias>%s</initiator_alias>" 1594 "<target>%s</target>" 1595 "<target_alias>%s</target_alias>" 1596 "<header_digest>%s</header_digest>" 1597 "<data_digest>%s</data_digest>" 1598 "<max_data_segment_length>%zd</max_data_segment_length>" 1599 "<immediate_data>%d</immediate_data>" 1600 "<iser>%d</iser>" 1601 "</connection>\n", 1602 cs->cs_id, 1603 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1604 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1605 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1606 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1607 cs->cs_max_data_segment_length, 1608 cs->cs_immediate_data, 1609 cs->cs_conn->ic_iser); 1610 if (error != 0) 1611 break; 1612 } 1613 mtx_unlock(&softc->lock); 1614 error = sbuf_printf(sb, "</ctlislist>\n"); 1615 if (error != 0) { 1616 sbuf_delete(sb); 1617 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1618 snprintf(ci->error_str, sizeof(ci->error_str), 1619 "Out of space, %d bytes is too small", cilp->alloc_len); 1620 return; 1621 } 1622 sbuf_finish(sb); 1623 1624 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1625 cilp->fill_len = sbuf_len(sb) + 1; 1626 ci->status = CTL_ISCSI_OK; 1627 sbuf_delete(sb); 1628} 1629 1630static void 1631cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1632{ 1633 struct icl_pdu *response; 1634 struct iscsi_bhs_asynchronous_message *bhsam; 1635 struct ctl_iscsi_terminate_params *citp; 1636 struct cfiscsi_session *cs; 1637 struct cfiscsi_softc *softc; 1638 int found = 0; 1639 1640 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1641 softc = &cfiscsi_softc; 1642 1643 mtx_lock(&softc->lock); 1644 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1645 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1646 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1647 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1648 continue; 1649 1650 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1651 if (response == NULL) { 1652 /* 1653 * Oh well. Just terminate the connection. 1654 */ 1655 } else { 1656 bhsam = (struct iscsi_bhs_asynchronous_message *) 1657 response->ip_bhs; 1658 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1659 bhsam->bhsam_flags = 0x80; 1660 bhsam->bhsam_0xffffffff = 0xffffffff; 1661 bhsam->bhsam_async_event = 1662 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1663 cfiscsi_pdu_queue(response); 1664 } 1665 cfiscsi_session_terminate(cs); 1666 found++; 1667 } 1668 mtx_unlock(&softc->lock); 1669 1670 if (found == 0) { 1671 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1672 snprintf(ci->error_str, sizeof(ci->error_str), 1673 "No matching connections found"); 1674 return; 1675 } 1676 1677 ci->status = CTL_ISCSI_OK; 1678} 1679 1680static void 1681cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1682{ 1683 struct icl_pdu *response; 1684 struct iscsi_bhs_asynchronous_message *bhsam; 1685 struct ctl_iscsi_logout_params *cilp; 1686 struct cfiscsi_session *cs; 1687 struct cfiscsi_softc *softc; 1688 int found = 0; 1689 1690 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1691 softc = &cfiscsi_softc; 1692 1693 mtx_lock(&softc->lock); 1694 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1695 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1696 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1697 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1698 continue; 1699 1700 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1701 if (response == NULL) { 1702 ci->status = CTL_ISCSI_ERROR; 1703 snprintf(ci->error_str, sizeof(ci->error_str), 1704 "Unable to allocate memory"); 1705 mtx_unlock(&softc->lock); 1706 return; 1707 } 1708 bhsam = 1709 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1710 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1711 bhsam->bhsam_flags = 0x80; 1712 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1713 bhsam->bhsam_parameter3 = htons(10); 1714 cfiscsi_pdu_queue(response); 1715 found++; 1716 } 1717 mtx_unlock(&softc->lock); 1718 1719 if (found == 0) { 1720 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1721 snprintf(ci->error_str, sizeof(ci->error_str), 1722 "No matching connections found"); 1723 return; 1724 } 1725 1726 ci->status = CTL_ISCSI_OK; 1727} 1728 1729#ifdef ICL_KERNEL_PROXY 1730static void 1731cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1732{ 1733 struct ctl_iscsi_listen_params *cilp; 1734 struct sockaddr *sa; 1735 int error; 1736 1737 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1738 1739 if (cfiscsi_softc.listener == NULL) { 1740 CFISCSI_DEBUG("no listener"); 1741 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1742 ci->status = CTL_ISCSI_ERROR; 1743 return; 1744 } 1745 1746 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1747 if (error != 0) { 1748 CFISCSI_DEBUG("getsockaddr, error %d", error); 1749 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1750 ci->status = CTL_ISCSI_ERROR; 1751 return; 1752 } 1753 1754 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1755 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1756 if (error != 0) { 1757 free(sa, M_SONAME); 1758 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1759 snprintf(ci->error_str, sizeof(ci->error_str), 1760 "icl_listen_add failed, error %d", error); 1761 ci->status = CTL_ISCSI_ERROR; 1762 return; 1763 } 1764 1765 ci->status = CTL_ISCSI_OK; 1766} 1767 1768static void 1769cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1770{ 1771 struct ctl_iscsi_accept_params *ciap; 1772 struct cfiscsi_session *cs; 1773 int error; 1774 1775 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1776 1777 mtx_lock(&cfiscsi_softc.lock); 1778 for (;;) { 1779 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1780 if (cs->cs_waiting_for_ctld) 1781 break; 1782 } 1783 if (cs != NULL) 1784 break; 1785 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1786 if (error != 0) { 1787 mtx_unlock(&cfiscsi_softc.lock); 1788 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1789 ci->status = CTL_ISCSI_ERROR; 1790 return; 1791 } 1792 } 1793 mtx_unlock(&cfiscsi_softc.lock); 1794 1795 cs->cs_waiting_for_ctld = false; 1796 cs->cs_login_phase = true; 1797 1798 ciap->connection_id = cs->cs_id; 1799 ciap->portal_id = cs->cs_portal_id; 1800 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1801 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1802 cs->cs_initiator_sa->sa_len); 1803 if (error != 0) { 1804 snprintf(ci->error_str, sizeof(ci->error_str), 1805 "copyout failed with error %d", error); 1806 ci->status = CTL_ISCSI_ERROR; 1807 return; 1808 } 1809 1810 ci->status = CTL_ISCSI_OK; 1811} 1812 1813static void 1814cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1815{ 1816 struct ctl_iscsi_send_params *cisp; 1817 struct cfiscsi_session *cs; 1818 struct icl_pdu *ip; 1819 size_t datalen; 1820 void *data; 1821 int error; 1822 1823 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1824 1825 mtx_lock(&cfiscsi_softc.lock); 1826 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1827 if (cs->cs_id == cisp->connection_id) 1828 break; 1829 } 1830 if (cs == NULL) { 1831 mtx_unlock(&cfiscsi_softc.lock); 1832 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1833 ci->status = CTL_ISCSI_ERROR; 1834 return; 1835 } 1836 mtx_unlock(&cfiscsi_softc.lock); 1837 1838#if 0 1839 if (cs->cs_login_phase == false) 1840 return (EBUSY); 1841#endif 1842 1843 if (cs->cs_terminating) { 1844 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1845 ci->status = CTL_ISCSI_ERROR; 1846 return; 1847 } 1848 1849 datalen = cisp->data_segment_len; 1850 /* 1851 * XXX 1852 */ 1853 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1854 if (datalen > 65535) { 1855 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1856 ci->status = CTL_ISCSI_ERROR; 1857 return; 1858 } 1859 if (datalen > 0) { 1860 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1861 error = copyin(cisp->data_segment, data, datalen); 1862 if (error != 0) { 1863 free(data, M_CFISCSI); 1864 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1865 ci->status = CTL_ISCSI_ERROR; 1866 return; 1867 } 1868 } 1869 1870 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1871 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1872 if (datalen > 0) { 1873 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1874 free(data, M_CFISCSI); 1875 } 1876 CFISCSI_SESSION_LOCK(cs); 1877 icl_pdu_queue(ip); 1878 CFISCSI_SESSION_UNLOCK(cs); 1879 ci->status = CTL_ISCSI_OK; 1880} 1881 1882static void 1883cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1884{ 1885 struct ctl_iscsi_receive_params *cirp; 1886 struct cfiscsi_session *cs; 1887 struct icl_pdu *ip; 1888 void *data; 1889 int error; 1890 1891 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1892 1893 mtx_lock(&cfiscsi_softc.lock); 1894 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1895 if (cs->cs_id == cirp->connection_id) 1896 break; 1897 } 1898 if (cs == NULL) { 1899 mtx_unlock(&cfiscsi_softc.lock); 1900 snprintf(ci->error_str, sizeof(ci->error_str), 1901 "connection not found"); 1902 ci->status = CTL_ISCSI_ERROR; 1903 return; 1904 } 1905 mtx_unlock(&cfiscsi_softc.lock); 1906 1907#if 0 1908 if (is->is_login_phase == false) 1909 return (EBUSY); 1910#endif 1911 1912 CFISCSI_SESSION_LOCK(cs); 1913 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1914 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1915 if (error != 0) { 1916 CFISCSI_SESSION_UNLOCK(cs); 1917 snprintf(ci->error_str, sizeof(ci->error_str), 1918 "interrupted by signal"); 1919 ci->status = CTL_ISCSI_ERROR; 1920 return; 1921 } 1922 } 1923 1924 if (cs->cs_terminating) { 1925 CFISCSI_SESSION_UNLOCK(cs); 1926 snprintf(ci->error_str, sizeof(ci->error_str), 1927 "connection terminating"); 1928 ci->status = CTL_ISCSI_ERROR; 1929 return; 1930 } 1931 ip = cs->cs_login_pdu; 1932 cs->cs_login_pdu = NULL; 1933 CFISCSI_SESSION_UNLOCK(cs); 1934 1935 if (ip->ip_data_len > cirp->data_segment_len) { 1936 icl_pdu_free(ip); 1937 snprintf(ci->error_str, sizeof(ci->error_str), 1938 "data segment too big"); 1939 ci->status = CTL_ISCSI_ERROR; 1940 return; 1941 } 1942 1943 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1944 if (ip->ip_data_len > 0) { 1945 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1946 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1947 copyout(data, cirp->data_segment, ip->ip_data_len); 1948 free(data, M_CFISCSI); 1949 } 1950 1951 icl_pdu_free(ip); 1952 ci->status = CTL_ISCSI_OK; 1953} 1954 1955#endif /* !ICL_KERNEL_PROXY */ 1956 1957static void 1958cfiscsi_ioctl_port_create(struct ctl_req *req) 1959{ 1960 struct cfiscsi_target *ct; 1961 struct ctl_port *port; 1962 const char *target, *alias, *tag; 1963 struct scsi_vpd_id_descriptor *desc; 1964 ctl_options_t opts; 1965 int retval, len, idlen; 1966 1967 ctl_init_opts(&opts, req->num_args, req->kern_args); 1968 target = ctl_get_opt(&opts, "cfiscsi_target"); 1969 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1970 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1971 if (target == NULL || tag == NULL) { 1972 req->status = CTL_LUN_ERROR; 1973 snprintf(req->error_str, sizeof(req->error_str), 1974 "Missing required argument"); 1975 ctl_free_opts(&opts); 1976 return; 1977 } 1978 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1979 if (ct == NULL) { 1980 req->status = CTL_LUN_ERROR; 1981 snprintf(req->error_str, sizeof(req->error_str), 1982 "failed to create target \"%s\"", target); 1983 ctl_free_opts(&opts); 1984 return; 1985 } 1986 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1987 req->status = CTL_LUN_ERROR; 1988 snprintf(req->error_str, sizeof(req->error_str), 1989 "target \"%s\" already exists", target); 1990 cfiscsi_target_release(ct); 1991 ctl_free_opts(&opts); 1992 return; 1993 } 1994 port = &ct->ct_port; 1995 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 1996 goto done; 1997 1998 port->frontend = &cfiscsi_frontend; 1999 port->port_type = CTL_PORT_ISCSI; 2000 /* XXX KDM what should the real number be here? */ 2001 port->num_requested_ctl_io = 4096; 2002 port->port_name = "iscsi"; 2003 port->physical_port = strtoul(tag, NULL, 0); 2004 port->virtual_port = ct->ct_target_id; 2005 port->port_online = cfiscsi_online; 2006 port->port_offline = cfiscsi_offline; 2007 port->port_info = cfiscsi_info; 2008 port->onoff_arg = ct; 2009 port->lun_enable = cfiscsi_lun_enable; 2010 port->lun_disable = cfiscsi_lun_disable; 2011 port->lun_map = cfiscsi_lun_map; 2012 port->targ_lun_arg = ct; 2013 port->fe_datamove = cfiscsi_datamove; 2014 port->fe_done = cfiscsi_done; 2015 2016 /* XXX KDM what should we report here? */ 2017 /* XXX These should probably be fetched from CTL. */ 2018 port->max_targets = 1; 2019 port->max_target_id = 15; 2020 2021 port->options = opts; 2022 STAILQ_INIT(&opts); 2023 2024 /* Generate Port ID. */ 2025 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2026 idlen = roundup2(idlen, 4); 2027 len = sizeof(struct scsi_vpd_device_id) + idlen; 2028 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2029 M_CTL, M_WAITOK | M_ZERO); 2030 port->port_devid->len = len; 2031 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2032 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2033 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2034 SVPD_ID_TYPE_SCSI_NAME; 2035 desc->length = idlen; 2036 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2037 target, port->physical_port); 2038 2039 /* Generate Target ID. */ 2040 idlen = strlen(target) + 1; 2041 idlen = roundup2(idlen, 4); 2042 len = sizeof(struct scsi_vpd_device_id) + idlen; 2043 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2044 M_CTL, M_WAITOK | M_ZERO); 2045 port->target_devid->len = len; 2046 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2047 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2048 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2049 SVPD_ID_TYPE_SCSI_NAME; 2050 desc->length = idlen; 2051 strlcpy(desc->identifier, target, idlen); 2052 2053 retval = ctl_port_register(port); 2054 if (retval != 0) { 2055 ctl_free_opts(&port->options); 2056 cfiscsi_target_release(ct); 2057 free(port->port_devid, M_CFISCSI); 2058 free(port->target_devid, M_CFISCSI); 2059 req->status = CTL_LUN_ERROR; 2060 snprintf(req->error_str, sizeof(req->error_str), 2061 "ctl_frontend_register() failed with error %d", retval); 2062 return; 2063 } 2064done: 2065 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2066 req->status = CTL_LUN_OK; 2067 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2068 sizeof(port->targ_port)); //XXX 2069} 2070 2071static void 2072cfiscsi_ioctl_port_remove(struct ctl_req *req) 2073{ 2074 struct cfiscsi_target *ct; 2075 const char *target; 2076 ctl_options_t opts; 2077 2078 ctl_init_opts(&opts, req->num_args, req->kern_args); 2079 target = ctl_get_opt(&opts, "cfiscsi_target"); 2080 if (target == NULL) { 2081 ctl_free_opts(&opts); 2082 req->status = CTL_LUN_ERROR; 2083 snprintf(req->error_str, sizeof(req->error_str), 2084 "Missing required argument"); 2085 return; 2086 } 2087 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2088 if (ct == NULL) { 2089 ctl_free_opts(&opts); 2090 req->status = CTL_LUN_ERROR; 2091 snprintf(req->error_str, sizeof(req->error_str), 2092 "can't find target \"%s\"", target); 2093 return; 2094 } 2095 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2096 ctl_free_opts(&opts); 2097 req->status = CTL_LUN_ERROR; 2098 snprintf(req->error_str, sizeof(req->error_str), 2099 "target \"%s\" is already dying", target); 2100 return; 2101 } 2102 ctl_free_opts(&opts); 2103 2104 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2105 ctl_port_offline(&ct->ct_port); 2106 cfiscsi_target_release(ct); 2107 cfiscsi_target_release(ct); 2108} 2109 2110static int 2111cfiscsi_ioctl(struct cdev *dev, 2112 u_long cmd, caddr_t addr, int flag, struct thread *td) 2113{ 2114 struct ctl_iscsi *ci; 2115 struct ctl_req *req; 2116 2117 if (cmd == CTL_PORT_REQ) { 2118 req = (struct ctl_req *)addr; 2119 switch (req->reqtype) { 2120 case CTL_REQ_CREATE: 2121 cfiscsi_ioctl_port_create(req); 2122 break; 2123 case CTL_REQ_REMOVE: 2124 cfiscsi_ioctl_port_remove(req); 2125 break; 2126 default: 2127 req->status = CTL_LUN_ERROR; 2128 snprintf(req->error_str, sizeof(req->error_str), 2129 "Unsupported request type %d", req->reqtype); 2130 } 2131 return (0); 2132 } 2133 2134 if (cmd != CTL_ISCSI) 2135 return (ENOTTY); 2136 2137 ci = (struct ctl_iscsi *)addr; 2138 switch (ci->type) { 2139 case CTL_ISCSI_HANDOFF: 2140 cfiscsi_ioctl_handoff(ci); 2141 break; 2142 case CTL_ISCSI_LIST: 2143 cfiscsi_ioctl_list(ci); 2144 break; 2145 case CTL_ISCSI_TERMINATE: 2146 cfiscsi_ioctl_terminate(ci); 2147 break; 2148 case CTL_ISCSI_LOGOUT: 2149 cfiscsi_ioctl_logout(ci); 2150 break; 2151#ifdef ICL_KERNEL_PROXY 2152 case CTL_ISCSI_LISTEN: 2153 cfiscsi_ioctl_listen(ci); 2154 break; 2155 case CTL_ISCSI_ACCEPT: 2156 cfiscsi_ioctl_accept(ci); 2157 break; 2158 case CTL_ISCSI_SEND: 2159 cfiscsi_ioctl_send(ci); 2160 break; 2161 case CTL_ISCSI_RECEIVE: 2162 cfiscsi_ioctl_receive(ci); 2163 break; 2164#else 2165 case CTL_ISCSI_LISTEN: 2166 case CTL_ISCSI_ACCEPT: 2167 case CTL_ISCSI_SEND: 2168 case CTL_ISCSI_RECEIVE: 2169 ci->status = CTL_ISCSI_ERROR; 2170 snprintf(ci->error_str, sizeof(ci->error_str), 2171 "%s: CTL compiled without ICL_KERNEL_PROXY", 2172 __func__); 2173 break; 2174#endif /* !ICL_KERNEL_PROXY */ 2175 default: 2176 ci->status = CTL_ISCSI_ERROR; 2177 snprintf(ci->error_str, sizeof(ci->error_str), 2178 "%s: invalid iSCSI request type %d", __func__, ci->type); 2179 break; 2180 } 2181 2182 return (0); 2183} 2184 2185static void 2186cfiscsi_target_hold(struct cfiscsi_target *ct) 2187{ 2188 2189 refcount_acquire(&ct->ct_refcount); 2190} 2191 2192static void 2193cfiscsi_target_release(struct cfiscsi_target *ct) 2194{ 2195 struct cfiscsi_softc *softc; 2196 2197 softc = ct->ct_softc; 2198 mtx_lock(&softc->lock); 2199 if (refcount_release(&ct->ct_refcount)) { 2200 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2201 mtx_unlock(&softc->lock); 2202 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2203 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2204 if (ctl_port_deregister(&ct->ct_port) != 0) 2205 printf("%s: ctl_port_deregister() failed\n", 2206 __func__); 2207 } 2208 free(ct, M_CFISCSI); 2209 2210 return; 2211 } 2212 mtx_unlock(&softc->lock); 2213} 2214 2215static struct cfiscsi_target * 2216cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2217{ 2218 struct cfiscsi_target *ct; 2219 2220 mtx_lock(&softc->lock); 2221 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2222 if (strcmp(name, ct->ct_name) != 0 || 2223 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2224 continue; 2225 cfiscsi_target_hold(ct); 2226 mtx_unlock(&softc->lock); 2227 return (ct); 2228 } 2229 mtx_unlock(&softc->lock); 2230 2231 return (NULL); 2232} 2233 2234static struct cfiscsi_target * 2235cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2236 const char *alias) 2237{ 2238 struct cfiscsi_target *ct, *newct; 2239 int i; 2240 2241 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2242 return (NULL); 2243 2244 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2245 2246 mtx_lock(&softc->lock); 2247 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2248 if (strcmp(name, ct->ct_name) != 0 || 2249 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2250 continue; 2251 cfiscsi_target_hold(ct); 2252 mtx_unlock(&softc->lock); 2253 free(newct, M_CFISCSI); 2254 return (ct); 2255 } 2256 2257 for (i = 0; i < CTL_MAX_LUNS; i++) 2258 newct->ct_luns[i] = UINT32_MAX; 2259 2260 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2261 if (alias != NULL) 2262 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2263 refcount_init(&newct->ct_refcount, 1); 2264 newct->ct_softc = softc; 2265 if (TAILQ_EMPTY(&softc->targets)) 2266 softc->last_target_id = 0; 2267 newct->ct_target_id = ++softc->last_target_id; 2268 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2269 mtx_unlock(&softc->lock); 2270 2271 return (newct); 2272} 2273 2274/* 2275 * Takes LUN from the target space and returns LUN from the CTL space. 2276 */ 2277static uint32_t 2278cfiscsi_lun_map(void *arg, uint32_t lun) 2279{ 2280 struct cfiscsi_target *ct = arg; 2281 2282 if (lun >= CTL_MAX_LUNS) { 2283 CFISCSI_DEBUG("requested lun number %d is higher " 2284 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2285 return (UINT32_MAX); 2286 } 2287 return (ct->ct_luns[lun]); 2288} 2289 2290static int 2291cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2292 unsigned long lun_id, unsigned long ctl_lun_id) 2293{ 2294 2295 if (lun_id >= CTL_MAX_LUNS) { 2296 CFISCSI_WARN("requested lun number %ld is higher " 2297 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2298 return (-1); 2299 } 2300 2301 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2302 /* 2303 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2304 * when the LUN is created, and a second time just before 2305 * the port is brought online; don't emit warnings 2306 * for that case. 2307 */ 2308 if (ct->ct_luns[lun_id] == ctl_lun_id) 2309 return (0); 2310 CFISCSI_WARN("lun %ld already allocated", lun_id); 2311 return (-1); 2312 } 2313 2314#if 0 2315 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2316 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2317#endif 2318 2319 ct->ct_luns[lun_id] = ctl_lun_id; 2320 2321 return (0); 2322} 2323 2324static int 2325cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2326{ 2327 struct cfiscsi_softc *softc; 2328 struct cfiscsi_target *ct; 2329 const char *target = NULL; 2330 const char *lun = NULL; 2331 unsigned long tmp; 2332 2333 ct = (struct cfiscsi_target *)arg; 2334 softc = ct->ct_softc; 2335 2336 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2337 "cfiscsi_target"); 2338 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2339 "cfiscsi_lun"); 2340 2341 if (target == NULL && lun == NULL) 2342 return (0); 2343 2344 if (target == NULL || lun == NULL) { 2345 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2346 "cfiscsi_lun, or the other way around; ignoring"); 2347 return (0); 2348 } 2349 2350 if (strcmp(target, ct->ct_name) != 0) 2351 return (0); 2352 2353 tmp = strtoul(lun, NULL, 10); 2354 cfiscsi_target_set_lun(ct, tmp, lun_id); 2355 return (0); 2356} 2357 2358static int 2359cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2360{ 2361 struct cfiscsi_softc *softc; 2362 struct cfiscsi_target *ct; 2363 int i; 2364 2365 ct = (struct cfiscsi_target *)arg; 2366 softc = ct->ct_softc; 2367 2368 mtx_lock(&softc->lock); 2369 for (i = 0; i < CTL_MAX_LUNS; i++) { 2370 if (ct->ct_luns[i] != lun_id) 2371 continue; 2372 ct->ct_luns[i] = UINT32_MAX; 2373 break; 2374 } 2375 mtx_unlock(&softc->lock); 2376 return (0); 2377} 2378 2379static void 2380cfiscsi_datamove_in(union ctl_io *io) 2381{ 2382 struct cfiscsi_session *cs; 2383 struct icl_pdu *request, *response; 2384 const struct iscsi_bhs_scsi_command *bhssc; 2385 struct iscsi_bhs_data_in *bhsdi; 2386 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2387 size_t len, expected_len, sg_len, buffer_offset; 2388 const char *sg_addr; 2389 int ctl_sg_count, error, i; 2390 2391 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2392 cs = PDU_SESSION(request); 2393 2394 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2395 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2396 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2397 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2398 2399 if (io->scsiio.kern_sg_entries > 0) { 2400 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2401 ctl_sg_count = io->scsiio.kern_sg_entries; 2402 } else { 2403 ctl_sglist = &ctl_sg_entry; 2404 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2405 ctl_sglist->len = io->scsiio.kern_data_len; 2406 ctl_sg_count = 1; 2407 } 2408 2409 /* 2410 * This is the total amount of data to be transferred within the current 2411 * SCSI command. We need to record it so that we can properly report 2412 * underflow/underflow. 2413 */ 2414 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2415 2416 /* 2417 * This is the offset within the current SCSI command; for the first 2418 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2419 * it will be the sum of lengths of previous ones. 2420 */ 2421 buffer_offset = io->scsiio.kern_rel_offset; 2422 2423 /* 2424 * This is the transfer length expected by the initiator. In theory, 2425 * it could be different from the correct amount of data from the SCSI 2426 * point of view, even if that doesn't make any sense. 2427 */ 2428 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2429#if 0 2430 if (expected_len != io->scsiio.kern_total_len) { 2431 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2432 "actual length %zd", expected_len, 2433 (size_t)io->scsiio.kern_total_len); 2434 } 2435#endif 2436 2437 if (buffer_offset >= expected_len) { 2438#if 0 2439 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2440 "already sent the expected len", buffer_offset); 2441#endif 2442 io->scsiio.be_move_done(io); 2443 return; 2444 } 2445 2446 i = 0; 2447 sg_addr = NULL; 2448 sg_len = 0; 2449 response = NULL; 2450 bhsdi = NULL; 2451 for (;;) { 2452 if (response == NULL) { 2453 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2454 if (response == NULL) { 2455 CFISCSI_SESSION_WARN(cs, "failed to " 2456 "allocate memory; dropping connection"); 2457 ctl_set_busy(&io->scsiio); 2458 io->scsiio.be_move_done(io); 2459 cfiscsi_session_terminate(cs); 2460 return; 2461 } 2462 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2463 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2464 bhsdi->bhsdi_initiator_task_tag = 2465 bhssc->bhssc_initiator_task_tag; 2466 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2467 PDU_EXPDATASN(request)++; 2468 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2469 } 2470 2471 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2472 if (sg_len == 0) { 2473 sg_addr = ctl_sglist[i].addr; 2474 sg_len = ctl_sglist[i].len; 2475 KASSERT(sg_len > 0, ("sg_len <= 0")); 2476 } 2477 2478 len = sg_len; 2479 2480 /* 2481 * Truncate to maximum data segment length. 2482 */ 2483 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2484 ("ip_data_len %zd >= max_data_segment_length %zd", 2485 response->ip_data_len, cs->cs_max_data_segment_length)); 2486 if (response->ip_data_len + len > 2487 cs->cs_max_data_segment_length) { 2488 len = cs->cs_max_data_segment_length - 2489 response->ip_data_len; 2490 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2491 len, sg_len)); 2492 } 2493 2494 /* 2495 * Truncate to expected data transfer length. 2496 */ 2497 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2498 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2499 buffer_offset, response->ip_data_len, expected_len)); 2500 if (buffer_offset + response->ip_data_len + len > expected_len) { 2501 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2502 "to expected data transfer length %zd", 2503 buffer_offset + response->ip_data_len + len, expected_len); 2504 len = expected_len - (buffer_offset + response->ip_data_len); 2505 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2506 len, sg_len)); 2507 } 2508 2509 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2510 if (error != 0) { 2511 CFISCSI_SESSION_WARN(cs, "failed to " 2512 "allocate memory; dropping connection"); 2513 icl_pdu_free(response); 2514 ctl_set_busy(&io->scsiio); 2515 io->scsiio.be_move_done(io); 2516 cfiscsi_session_terminate(cs); 2517 return; 2518 } 2519 sg_addr += len; 2520 sg_len -= len; 2521 2522 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2523 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2524 buffer_offset, response->ip_data_len, expected_len)); 2525 if (buffer_offset + response->ip_data_len == expected_len) { 2526 /* 2527 * Already have the amount of data the initiator wanted. 2528 */ 2529 break; 2530 } 2531 2532 if (sg_len == 0) { 2533 /* 2534 * End of scatter-gather segment; 2535 * proceed to the next one... 2536 */ 2537 if (i == ctl_sg_count - 1) { 2538 /* 2539 * ... unless this was the last one. 2540 */ 2541 break; 2542 } 2543 i++; 2544 } 2545 2546 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2547 /* 2548 * Can't stuff more data into the current PDU; 2549 * queue it. Note that's not enough to check 2550 * for kern_data_resid == 0 instead; there 2551 * may be several Data-In PDUs for the final 2552 * call to cfiscsi_datamove(), and we want 2553 * to set the F flag only on the last of them. 2554 */ 2555 buffer_offset += response->ip_data_len; 2556 if (buffer_offset == io->scsiio.kern_total_len || 2557 buffer_offset == expected_len) { 2558 buffer_offset -= response->ip_data_len; 2559 break; 2560 } 2561 cfiscsi_pdu_queue(response); 2562 response = NULL; 2563 bhsdi = NULL; 2564 } 2565 } 2566 if (response != NULL) { 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 if (io->io_hdr.status == CTL_SUCCESS) { 2572 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2573 if (PDU_TOTAL_TRANSFER_LEN(request) < 2574 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2575 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2576 bhsdi->bhsdi_residual_count = 2577 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2578 PDU_TOTAL_TRANSFER_LEN(request)); 2579 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2580 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2581 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2582 bhsdi->bhsdi_residual_count = 2583 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2584 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2585 } 2586 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2587 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2588 } 2589 } 2590 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2591 cfiscsi_pdu_queue(response); 2592 } 2593 2594 io->scsiio.be_move_done(io); 2595} 2596 2597static void 2598cfiscsi_datamove_out(union ctl_io *io) 2599{ 2600 struct cfiscsi_session *cs; 2601 struct icl_pdu *request, *response; 2602 const struct iscsi_bhs_scsi_command *bhssc; 2603 struct iscsi_bhs_r2t *bhsr2t; 2604 struct cfiscsi_data_wait *cdw; 2605 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2606 uint32_t expected_len, r2t_off, r2t_len; 2607 uint32_t target_transfer_tag; 2608 bool done; 2609 2610 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2611 cs = PDU_SESSION(request); 2612 2613 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2614 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2615 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2616 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2617 2618 /* 2619 * We need to record it so that we can properly report 2620 * underflow/underflow. 2621 */ 2622 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2623 2624 /* 2625 * Report write underflow as error since CTL and backends don't 2626 * really support it, and SCSI does not tell how to do it right. 2627 */ 2628 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2629 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2630 expected_len) { 2631 io->scsiio.io_hdr.port_status = 43; 2632 io->scsiio.be_move_done(io); 2633 return; 2634 } 2635 2636 target_transfer_tag = 2637 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2638 2639#if 0 2640 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2641 "task tag 0x%x, target transfer tag 0x%x", 2642 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2643#endif 2644 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2645 if (cdw == NULL) { 2646 CFISCSI_SESSION_WARN(cs, "failed to " 2647 "allocate memory; dropping connection"); 2648 ctl_set_busy(&io->scsiio); 2649 io->scsiio.be_move_done(io); 2650 cfiscsi_session_terminate(cs); 2651 return; 2652 } 2653 cdw->cdw_ctl_io = io; 2654 cdw->cdw_target_transfer_tag = target_transfer_tag; 2655 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2656 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2657 2658 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2659 if (io->scsiio.kern_sg_entries > 0) { 2660 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2661 } else { 2662 ctl_sglist = &ctl_sg_entry; 2663 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2664 ctl_sglist->len = io->scsiio.kern_data_len; 2665 } 2666 cdw->cdw_sg_index = 0; 2667 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2668 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2669 r2t_off = io->scsiio.ext_data_filled; 2670 while (r2t_off > 0) { 2671 if (r2t_off >= cdw->cdw_sg_len) { 2672 r2t_off -= cdw->cdw_sg_len; 2673 cdw->cdw_sg_index++; 2674 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2675 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2676 continue; 2677 } 2678 cdw->cdw_sg_addr += r2t_off; 2679 cdw->cdw_sg_len -= r2t_off; 2680 r2t_off = 0; 2681 } 2682 2683 if (cs->cs_immediate_data && 2684 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2685 icl_pdu_data_segment_length(request)) { 2686 done = cfiscsi_handle_data_segment(request, cdw); 2687 if (done) { 2688 uma_zfree(cfiscsi_data_wait_zone, cdw); 2689 io->scsiio.be_move_done(io); 2690 return; 2691 } 2692 } 2693 2694 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2695 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2696 cs->cs_max_burst_length); 2697 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2698 2699 CFISCSI_SESSION_LOCK(cs); 2700 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2701 CFISCSI_SESSION_UNLOCK(cs); 2702 2703 /* 2704 * XXX: We should limit the number of outstanding R2T PDUs 2705 * per task to MaxOutstandingR2T. 2706 */ 2707 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2708 if (response == NULL) { 2709 CFISCSI_SESSION_WARN(cs, "failed to " 2710 "allocate memory; dropping connection"); 2711 ctl_set_busy(&io->scsiio); 2712 io->scsiio.be_move_done(io); 2713 cfiscsi_session_terminate(cs); 2714 return; 2715 } 2716 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2717 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2718 bhsr2t->bhsr2t_flags = 0x80; 2719 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2720 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2721 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2722 /* 2723 * XXX: Here we assume that cfiscsi_datamove() won't ever 2724 * be running concurrently on several CPUs for a given 2725 * command. 2726 */ 2727 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2728 PDU_R2TSN(request)++; 2729 /* 2730 * This is the offset within the current SCSI command; 2731 * i.e. for the first call of datamove(), it will be 0, 2732 * and for subsequent ones it will be the sum of lengths 2733 * of previous ones. 2734 * 2735 * The ext_data_filled is to account for unsolicited 2736 * (immediate) data that might have already arrived. 2737 */ 2738 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2739 /* 2740 * This is the total length (sum of S/G lengths) this call 2741 * to cfiscsi_datamove() is supposed to handle, limited by 2742 * MaxBurstLength. 2743 */ 2744 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2745 cfiscsi_pdu_queue(response); 2746} 2747 2748static void 2749cfiscsi_datamove(union ctl_io *io) 2750{ 2751 2752 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2753 cfiscsi_datamove_in(io); 2754 else { 2755 /* We hadn't received anything during this datamove yet. */ 2756 io->scsiio.ext_data_filled = 0; 2757 cfiscsi_datamove_out(io); 2758 } 2759} 2760 2761static void 2762cfiscsi_scsi_command_done(union ctl_io *io) 2763{ 2764 struct icl_pdu *request, *response; 2765 struct iscsi_bhs_scsi_command *bhssc; 2766 struct iscsi_bhs_scsi_response *bhssr; 2767#ifdef DIAGNOSTIC 2768 struct cfiscsi_data_wait *cdw; 2769#endif 2770 struct cfiscsi_session *cs; 2771 uint16_t sense_length; 2772 2773 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2774 cs = PDU_SESSION(request); 2775 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2776 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2777 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2778 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2779 2780 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2781 // bhssc->bhssc_initiator_task_tag); 2782 2783#ifdef DIAGNOSTIC 2784 CFISCSI_SESSION_LOCK(cs); 2785 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2786 KASSERT(bhssc->bhssc_initiator_task_tag != 2787 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2788 CFISCSI_SESSION_UNLOCK(cs); 2789#endif 2790 2791 /* 2792 * Do not return status for aborted commands. 2793 * There are exceptions, but none supported by CTL yet. 2794 */ 2795 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2796 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2797 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2798 ctl_free_io(io); 2799 icl_pdu_free(request); 2800 return; 2801 } 2802 2803 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2804 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2805 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2806 bhssr->bhssr_flags = 0x80; 2807 /* 2808 * XXX: We don't deal with bidirectional under/overflows; 2809 * does anything actually support those? 2810 */ 2811 if (PDU_TOTAL_TRANSFER_LEN(request) < 2812 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2813 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2814 bhssr->bhssr_residual_count = 2815 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2816 PDU_TOTAL_TRANSFER_LEN(request)); 2817 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2818 // ntohl(bhssr->bhssr_residual_count)); 2819 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2820 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2821 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2822 bhssr->bhssr_residual_count = 2823 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2824 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2825 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2826 // ntohl(bhssr->bhssr_residual_count)); 2827 } 2828 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2829 bhssr->bhssr_status = io->scsiio.scsi_status; 2830 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2831 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2832 2833 if (io->scsiio.sense_len > 0) { 2834#if 0 2835 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2836 io->scsiio.sense_len); 2837#endif 2838 sense_length = htons(io->scsiio.sense_len); 2839 icl_pdu_append_data(response, 2840 &sense_length, sizeof(sense_length), M_WAITOK); 2841 icl_pdu_append_data(response, 2842 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2843 } 2844 2845 ctl_free_io(io); 2846 icl_pdu_free(request); 2847 cfiscsi_pdu_queue(response); 2848} 2849 2850static void 2851cfiscsi_task_management_done(union ctl_io *io) 2852{ 2853 struct icl_pdu *request, *response; 2854 struct iscsi_bhs_task_management_request *bhstmr; 2855 struct iscsi_bhs_task_management_response *bhstmr2; 2856 struct cfiscsi_data_wait *cdw, *tmpcdw; 2857 struct cfiscsi_session *cs; 2858 2859 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2860 cs = PDU_SESSION(request); 2861 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2862 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2863 ISCSI_BHS_OPCODE_TASK_REQUEST, 2864 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2865 2866#if 0 2867 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2868 bhstmr->bhstmr_initiator_task_tag, 2869 bhstmr->bhstmr_referenced_task_tag); 2870#endif 2871 2872 if ((bhstmr->bhstmr_function & ~0x80) == 2873 BHSTMR_FUNCTION_ABORT_TASK) { 2874 /* 2875 * Make sure we no longer wait for Data-Out for this command. 2876 */ 2877 CFISCSI_SESSION_LOCK(cs); 2878 TAILQ_FOREACH_SAFE(cdw, 2879 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2880 if (bhstmr->bhstmr_referenced_task_tag != 2881 cdw->cdw_initiator_task_tag) 2882 continue; 2883 2884#if 0 2885 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2886 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2887#endif 2888 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2889 cdw, cdw_next); 2890 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2891 uma_zfree(cfiscsi_data_wait_zone, cdw); 2892 } 2893 CFISCSI_SESSION_UNLOCK(cs); 2894 } 2895 2896 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2897 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2898 response->ip_bhs; 2899 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2900 bhstmr2->bhstmr_flags = 0x80; 2901 if (io->io_hdr.status == CTL_SUCCESS) { 2902 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2903 } else { 2904 /* 2905 * XXX: How to figure out what exactly went wrong? iSCSI spec 2906 * expects us to provide detailed error, e.g. "Task does 2907 * not exist" or "LUN does not exist". 2908 */ 2909 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2910 bhstmr2->bhstmr_response = 2911 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2912 } 2913 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2914 2915 ctl_free_io(io); 2916 icl_pdu_free(request); 2917 cfiscsi_pdu_queue(response); 2918} 2919 2920static void 2921cfiscsi_done(union ctl_io *io) 2922{ 2923 struct icl_pdu *request; 2924 struct cfiscsi_session *cs; 2925 2926 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2927 ("invalid CTL status %#x", io->io_hdr.status)); 2928 2929 if (io->io_hdr.io_type == CTL_IO_TASK && 2930 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2931 /* 2932 * Implicit task termination has just completed; nothing to do. 2933 */ 2934 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2935 cs->cs_tasks_aborted = true; 2936 refcount_release(&cs->cs_outstanding_ctl_pdus); 2937 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2938 ctl_free_io(io); 2939 return; 2940 } 2941 2942 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2943 cs = PDU_SESSION(request); 2944 refcount_release(&cs->cs_outstanding_ctl_pdus); 2945 2946 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2947 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2948 cfiscsi_scsi_command_done(io); 2949 break; 2950 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2951 cfiscsi_task_management_done(io); 2952 break; 2953 default: 2954 panic("cfiscsi_done called with wrong opcode 0x%x", 2955 request->ip_bhs->bhs_opcode); 2956 } 2957} 2958