ctl_frontend_iscsi.c revision 268676
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 268676 2014-07-15 16:55:13Z 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 268676 2014-07-15 16:55:13Z 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 "ctl_frontend_iscsi.h" 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 3; 88TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95static int login_timeout = 60; 96TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99static int maxcmdsn_delta = 256; 100TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105#define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113#define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130#define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145#define PDU_EXPDATASN(X) (X)->ip_prv0 146#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147#define PDU_R2TSN(X) (X)->ip_prv2 148 149int cfiscsi_init(void); 150static void cfiscsi_online(void *arg); 151static void cfiscsi_offline(void *arg); 152static int cfiscsi_lun_enable(void *arg, 153 struct ctl_id target_id, int lun_id); 154static int cfiscsi_lun_disable(void *arg, 155 struct ctl_id target_id, int lun_id); 156static int cfiscsi_ioctl(struct cdev *dev, 157 u_long cmd, caddr_t addr, int flag, struct thread *td); 158static int cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len); 159static void cfiscsi_datamove(union ctl_io *io); 160static void cfiscsi_done(union ctl_io *io); 161static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun); 162static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 163static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 164static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 165static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 168static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 169static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 170 *softc, const char *name); 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 int cfiscsi_module_event_handler(module_t, int /*modeventtype_t*/, void *); 178 179static moduledata_t cfiscsi_moduledata = { 180 "ctlcfiscsi", 181 cfiscsi_module_event_handler, 182 NULL 183}; 184 185DECLARE_MODULE(ctlcfiscsi, cfiscsi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH); 186MODULE_VERSION(ctlcfiscsi, 1); 187MODULE_DEPEND(ctlcfiscsi, ctl, 1, 1, 1); 188MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 189 190static struct icl_pdu * 191cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 192{ 193 194 return (icl_pdu_new_bhs(request->ip_conn, flags)); 195} 196 197static bool 198cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 199{ 200 const struct iscsi_bhs_scsi_command *bhssc; 201 struct cfiscsi_session *cs; 202 uint32_t cmdsn, expstatsn; 203 204 cs = PDU_SESSION(request); 205 206 /* 207 * Every incoming PDU - not just NOP-Out - resets the ping timer. 208 * The purpose of the timeout is to reset the connection when it stalls; 209 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 210 * in some queue. 211 * 212 * XXX: Locking? 213 */ 214 cs->cs_timeout = 0; 215 216 /* 217 * Data-Out PDUs don't contain CmdSN. 218 */ 219 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 220 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 221 return (false); 222 223 /* 224 * We're only using fields common for all the request 225 * (initiator -> target) PDUs. 226 */ 227 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 228 cmdsn = ntohl(bhssc->bhssc_cmdsn); 229 expstatsn = ntohl(bhssc->bhssc_expstatsn); 230 231 CFISCSI_SESSION_LOCK(cs); 232#if 0 233 if (expstatsn != cs->cs_statsn) { 234 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 235 "while current StatSN is %d", expstatsn, 236 cs->cs_statsn); 237 } 238#endif 239 240 /* 241 * The target MUST silently ignore any non-immediate command outside 242 * of this range. 243 */ 244 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 245 CFISCSI_SESSION_UNLOCK(cs); 246 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 247 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 248 return (true); 249 } 250 251 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 252 cs->cs_cmdsn++; 253 254 CFISCSI_SESSION_UNLOCK(cs); 255 256 return (false); 257} 258 259static void 260cfiscsi_pdu_handle(struct icl_pdu *request) 261{ 262 struct cfiscsi_session *cs; 263 bool ignore; 264 265 cs = PDU_SESSION(request); 266 267 ignore = cfiscsi_pdu_update_cmdsn(request); 268 if (ignore) { 269 icl_pdu_free(request); 270 return; 271 } 272 273 /* 274 * Handle the PDU; this includes e.g. receiving the remaining 275 * part of PDU and submitting the SCSI command to CTL 276 * or queueing a reply. The handling routine is responsible 277 * for freeing the PDU when it's no longer needed. 278 */ 279 switch (request->ip_bhs->bhs_opcode & 280 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 281 case ISCSI_BHS_OPCODE_NOP_OUT: 282 cfiscsi_pdu_handle_nop_out(request); 283 break; 284 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 285 cfiscsi_pdu_handle_scsi_command(request); 286 break; 287 case ISCSI_BHS_OPCODE_TASK_REQUEST: 288 cfiscsi_pdu_handle_task_request(request); 289 break; 290 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 291 cfiscsi_pdu_handle_data_out(request); 292 break; 293 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 294 cfiscsi_pdu_handle_logout_request(request); 295 break; 296 default: 297 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 298 "opcode 0x%x; dropping connection", 299 request->ip_bhs->bhs_opcode); 300 icl_pdu_free(request); 301 cfiscsi_session_terminate(cs); 302 } 303 304} 305 306static void 307cfiscsi_receive_callback(struct icl_pdu *request) 308{ 309 struct cfiscsi_session *cs; 310 311 cs = PDU_SESSION(request); 312 313#ifdef ICL_KERNEL_PROXY 314 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 315 if (cs->cs_login_pdu == NULL) 316 cs->cs_login_pdu = request; 317 else 318 icl_pdu_free(request); 319 cv_signal(&cs->cs_login_cv); 320 return; 321 } 322#endif 323 324 cfiscsi_pdu_handle(request); 325} 326 327static void 328cfiscsi_error_callback(struct icl_conn *ic) 329{ 330 struct cfiscsi_session *cs; 331 332 cs = CONN_SESSION(ic); 333 334 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 335 cfiscsi_session_terminate(cs); 336} 337 338static int 339cfiscsi_pdu_prepare(struct icl_pdu *response) 340{ 341 struct cfiscsi_session *cs; 342 struct iscsi_bhs_scsi_response *bhssr; 343 bool advance_statsn = true; 344 345 cs = PDU_SESSION(response); 346 347 CFISCSI_SESSION_LOCK_ASSERT(cs); 348 349 /* 350 * We're only using fields common for all the response 351 * (target -> initiator) PDUs. 352 */ 353 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 354 355 /* 356 * 10.8.3: "The StatSN for this connection is not advanced 357 * after this PDU is sent." 358 */ 359 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 360 advance_statsn = false; 361 362 /* 363 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 364 * StatSN for the connection is not advanced after this PDU is sent." 365 */ 366 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 367 bhssr->bhssr_initiator_task_tag == 0xffffffff) 368 advance_statsn = false; 369 370 /* 371 * See the comment below - StatSN is not meaningful and must 372 * not be advanced. 373 */ 374 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 375 advance_statsn = false; 376 377 /* 378 * 10.7.3: "The fields StatSN, Status, and Residual Count 379 * only have meaningful content if the S bit is set to 1." 380 */ 381 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 382 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 383 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 384 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 385 386 if (advance_statsn) 387 cs->cs_statsn++; 388 389 return (0); 390} 391 392static void 393cfiscsi_pdu_queue(struct icl_pdu *response) 394{ 395 struct cfiscsi_session *cs; 396 397 cs = PDU_SESSION(response); 398 399 CFISCSI_SESSION_LOCK(cs); 400 cfiscsi_pdu_prepare(response); 401 icl_pdu_queue(response); 402 CFISCSI_SESSION_UNLOCK(cs); 403} 404 405static uint32_t 406cfiscsi_decode_lun(uint64_t encoded) 407{ 408 uint8_t lun[8]; 409 uint32_t result; 410 411 /* 412 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 413 * but is in fact an evil, multidimensional structure defined 414 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 415 */ 416 memcpy(lun, &encoded, sizeof(lun)); 417 switch (lun[0] & 0xC0) { 418 case 0x00: 419 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 420 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 421 CFISCSI_WARN("malformed LUN " 422 "(peripheral device addressing method): 0x%jx", 423 (uintmax_t)encoded); 424 result = 0xffffffff; 425 break; 426 } 427 result = lun[1]; 428 break; 429 case 0x40: 430 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 431 lun[6] != 0 || lun[7] != 0) { 432 CFISCSI_WARN("malformed LUN " 433 "(flat address space addressing method): 0x%jx", 434 (uintmax_t)encoded); 435 result = 0xffffffff; 436 break; 437 } 438 result = ((lun[0] & 0x3f) << 8) + lun[1]; 439 break; 440 case 0xC0: 441 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 442 lun[6] != 0 || lun[7] != 0) { 443 CFISCSI_WARN("malformed LUN (extended flat " 444 "address space addressing method): 0x%jx", 445 (uintmax_t)encoded); 446 result = 0xffffffff; 447 break; 448 } 449 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 450 default: 451 CFISCSI_WARN("unsupported LUN format 0x%jx", 452 (uintmax_t)encoded); 453 result = 0xffffffff; 454 break; 455 } 456 457 return (result); 458} 459 460static void 461cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 462{ 463 struct cfiscsi_session *cs; 464 struct iscsi_bhs_nop_out *bhsno; 465 struct iscsi_bhs_nop_in *bhsni; 466 struct icl_pdu *response; 467 void *data = NULL; 468 size_t datasize; 469 int error; 470 471 cs = PDU_SESSION(request); 472 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 473 474 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 475 /* 476 * Nothing to do, iscsi_pdu_update_statsn() already 477 * zeroed the timeout. 478 */ 479 icl_pdu_free(request); 480 return; 481 } 482 483 datasize = icl_pdu_data_segment_length(request); 484 if (datasize > 0) { 485 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 486 if (data == NULL) { 487 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 488 "dropping connection"); 489 icl_pdu_free(request); 490 cfiscsi_session_terminate(cs); 491 return; 492 } 493 icl_pdu_get_data(request, 0, data, datasize); 494 } 495 496 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 497 if (response == NULL) { 498 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 499 "droppping connection"); 500 free(data, M_CFISCSI); 501 icl_pdu_free(request); 502 cfiscsi_session_terminate(cs); 503 return; 504 } 505 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 506 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 507 bhsni->bhsni_flags = 0x80; 508 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 509 bhsni->bhsni_target_transfer_tag = 0xffffffff; 510 if (datasize > 0) { 511 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 512 if (error != 0) { 513 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 514 "dropping connection"); 515 free(data, M_CFISCSI); 516 icl_pdu_free(request); 517 icl_pdu_free(response); 518 cfiscsi_session_terminate(cs); 519 return; 520 } 521 free(data, M_CFISCSI); 522 } 523 524 icl_pdu_free(request); 525 cfiscsi_pdu_queue(response); 526} 527 528static void 529cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 530{ 531 struct iscsi_bhs_scsi_command *bhssc; 532 struct cfiscsi_session *cs; 533 union ctl_io *io; 534 int error; 535 536 cs = PDU_SESSION(request); 537 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 538 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 539 // bhssc->bhssc_initiator_task_tag); 540 541 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 542 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 543 "ImmediateData=No; dropping connection"); 544 icl_pdu_free(request); 545 cfiscsi_session_terminate(cs); 546 return; 547 } 548 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 549 if (io == NULL) { 550 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 551 "dropping connection"); 552 icl_pdu_free(request); 553 cfiscsi_session_terminate(cs); 554 return; 555 } 556 ctl_zero_io(io); 557 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 558 io->io_hdr.io_type = CTL_IO_SCSI; 559 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 560 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 561 io->io_hdr.nexus.targ_target.id = 0; 562 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 563 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 564 io->io_hdr.nexus.lun_map_arg = cs; 565 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 566 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 567 case BHSSC_FLAGS_ATTR_UNTAGGED: 568 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 569 break; 570 case BHSSC_FLAGS_ATTR_SIMPLE: 571 io->scsiio.tag_type = CTL_TAG_SIMPLE; 572 break; 573 case BHSSC_FLAGS_ATTR_ORDERED: 574 io->scsiio.tag_type = CTL_TAG_ORDERED; 575 break; 576 case BHSSC_FLAGS_ATTR_HOQ: 577 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 578 break; 579 case BHSSC_FLAGS_ATTR_ACA: 580 io->scsiio.tag_type = CTL_TAG_ACA; 581 break; 582 default: 583 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 584 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 585 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 586 break; 587 } 588 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 589 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 590 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 591 error = ctl_queue(io); 592 if (error != CTL_RETVAL_COMPLETE) { 593 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 594 "dropping connection", error); 595 ctl_free_io(io); 596 refcount_release(&cs->cs_outstanding_ctl_pdus); 597 icl_pdu_free(request); 598 cfiscsi_session_terminate(cs); 599 } 600} 601 602static void 603cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 604{ 605 struct iscsi_bhs_task_management_request *bhstmr; 606 struct iscsi_bhs_task_management_response *bhstmr2; 607 struct icl_pdu *response; 608 struct cfiscsi_session *cs; 609 union ctl_io *io; 610 int error; 611 612 cs = PDU_SESSION(request); 613 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 614 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 615 if (io == NULL) { 616 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 617 "dropping connection"); 618 icl_pdu_free(request); 619 cfiscsi_session_terminate(cs); 620 return; 621 } 622 ctl_zero_io(io); 623 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 624 io->io_hdr.io_type = CTL_IO_TASK; 625 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 626 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 627 io->io_hdr.nexus.targ_target.id = 0; 628 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 629 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 630 io->io_hdr.nexus.lun_map_arg = cs; 631 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 632 633 switch (bhstmr->bhstmr_function & ~0x80) { 634 case BHSTMR_FUNCTION_ABORT_TASK: 635#if 0 636 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 637#endif 638 io->taskio.task_action = CTL_TASK_ABORT_TASK; 639 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 640 break; 641 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 642#if 0 643 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 644#endif 645 io->taskio.task_action = CTL_TASK_LUN_RESET; 646 break; 647 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 648#if 0 649 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 650#endif 651 io->taskio.task_action = CTL_TASK_TARGET_RESET; 652 break; 653 default: 654 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 655 bhstmr->bhstmr_function & ~0x80); 656 ctl_free_io(io); 657 658 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 659 if (response == NULL) { 660 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 661 "dropping connection"); 662 icl_pdu_free(request); 663 cfiscsi_session_terminate(cs); 664 return; 665 } 666 bhstmr2 = (struct iscsi_bhs_task_management_response *) 667 response->ip_bhs; 668 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 669 bhstmr2->bhstmr_flags = 0x80; 670 bhstmr2->bhstmr_response = 671 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 672 bhstmr2->bhstmr_initiator_task_tag = 673 bhstmr->bhstmr_initiator_task_tag; 674 icl_pdu_free(request); 675 cfiscsi_pdu_queue(response); 676 return; 677 } 678 679 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 680 error = ctl_queue(io); 681 if (error != CTL_RETVAL_COMPLETE) { 682 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 683 "dropping connection", error); 684 ctl_free_io(io); 685 refcount_release(&cs->cs_outstanding_ctl_pdus); 686 icl_pdu_free(request); 687 cfiscsi_session_terminate(cs); 688 } 689} 690 691static bool 692cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 693{ 694 struct iscsi_bhs_data_out *bhsdo; 695 struct cfiscsi_session *cs; 696 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 697 size_t copy_len, len, off, buffer_offset; 698 int ctl_sg_count; 699 union ctl_io *io; 700 701 cs = PDU_SESSION(request); 702 703 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 704 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 705 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 706 ISCSI_BHS_OPCODE_SCSI_COMMAND, 707 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 708 709 /* 710 * We're only using fields common for Data-Out and SCSI Command PDUs. 711 */ 712 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 713 714 io = cdw->cdw_ctl_io; 715 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 716 ("CTL_FLAG_DATA_IN")); 717 718#if 0 719 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 720 request->ip_data_len, io->scsiio.kern_total_len); 721#endif 722 723 if (io->scsiio.kern_sg_entries > 0) { 724 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 725 ctl_sg_count = io->scsiio.kern_sg_entries; 726 } else { 727 ctl_sglist = &ctl_sg_entry; 728 ctl_sglist->addr = io->scsiio.kern_data_ptr; 729 ctl_sglist->len = io->scsiio.kern_data_len; 730 ctl_sg_count = 1; 731 } 732 733 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 734 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 735 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 736 else 737 buffer_offset = 0; 738 len = icl_pdu_data_segment_length(request); 739 740 /* 741 * Make sure the offset, as sent by the initiator, matches the offset 742 * we're supposed to be at in the scatter-gather list. 743 */ 744 if (buffer_offset > 745 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 746 buffer_offset + len <= 747 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 748 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 749 "expected %zd; dropping connection", buffer_offset, 750 (size_t)io->scsiio.kern_rel_offset + 751 (size_t)io->scsiio.ext_data_filled); 752 ctl_set_data_phase_error(&io->scsiio); 753 cfiscsi_session_terminate(cs); 754 return (true); 755 } 756 757 /* 758 * This is the offset within the PDU data segment, as opposed 759 * to buffer_offset, which is the offset within the task (SCSI 760 * command). 761 */ 762 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 763 buffer_offset; 764 765 /* 766 * Iterate over the scatter/gather segments, filling them with data 767 * from the PDU data segment. Note that this can get called multiple 768 * times for one SCSI command; the cdw structure holds state for the 769 * scatter/gather list. 770 */ 771 for (;;) { 772 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 773 ("cdw->cdw_sg_index >= ctl_sg_count")); 774 if (cdw->cdw_sg_len == 0) { 775 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 776 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 777 } 778 KASSERT(off <= len, ("len > off")); 779 copy_len = len - off; 780 if (copy_len > cdw->cdw_sg_len) 781 copy_len = cdw->cdw_sg_len; 782 783 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 784 cdw->cdw_sg_addr += copy_len; 785 cdw->cdw_sg_len -= copy_len; 786 off += copy_len; 787 io->scsiio.ext_data_filled += copy_len; 788 789 if (cdw->cdw_sg_len == 0) { 790 /* 791 * End of current segment. 792 */ 793 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 794 /* 795 * Last segment in scatter/gather list. 796 */ 797 break; 798 } 799 cdw->cdw_sg_index++; 800 } 801 802 if (off == len) { 803 /* 804 * End of PDU payload. 805 */ 806 break; 807 } 808 } 809 810 if (len > off) { 811 /* 812 * In case of unsolicited data, it's possible that the buffer 813 * provided by CTL is smaller than negotiated FirstBurstLength. 814 * Just ignore the superfluous data; will ask for them with R2T 815 * on next call to cfiscsi_datamove(). 816 * 817 * This obviously can only happen with SCSI Command PDU. 818 */ 819 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 820 ISCSI_BHS_OPCODE_SCSI_COMMAND) 821 return (true); 822 823 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 824 "expected %zd; dropping connection", 825 icl_pdu_data_segment_length(request), off); 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 == io->scsiio.kern_data_len && 832 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 833 CFISCSI_SESSION_WARN(cs, "got the final packet without " 834 "the F flag; flags = 0x%x; dropping connection", 835 bhsdo->bhsdo_flags); 836 ctl_set_data_phase_error(&io->scsiio); 837 cfiscsi_session_terminate(cs); 838 return (true); 839 } 840 841 if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len && 842 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 843 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 844 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 845 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 846 "transmitted size was %zd bytes instead of %d; " 847 "dropping connection", 848 (size_t)io->scsiio.ext_data_filled, 849 io->scsiio.kern_data_len); 850 ctl_set_data_phase_error(&io->scsiio); 851 cfiscsi_session_terminate(cs); 852 return (true); 853 } else { 854 /* 855 * For SCSI Command PDU, this just means we need to 856 * solicit more data by sending R2T. 857 */ 858 return (false); 859 } 860 } 861 862 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) { 863#if 0 864 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 865 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 866#endif 867 868 return (true); 869 } 870 871 return (false); 872} 873 874static void 875cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 876{ 877 struct iscsi_bhs_data_out *bhsdo; 878 struct cfiscsi_session *cs; 879 struct cfiscsi_data_wait *cdw = NULL; 880 union ctl_io *io; 881 bool done; 882 883 cs = PDU_SESSION(request); 884 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 885 886 CFISCSI_SESSION_LOCK(cs); 887 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 888#if 0 889 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 890 "ttt 0x%x, itt 0x%x", 891 bhsdo->bhsdo_target_transfer_tag, 892 bhsdo->bhsdo_initiator_task_tag, 893 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 894#endif 895 if (bhsdo->bhsdo_target_transfer_tag == 896 cdw->cdw_target_transfer_tag) 897 break; 898 } 899 CFISCSI_SESSION_UNLOCK(cs); 900 if (cdw == NULL) { 901 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 902 "0x%x, not found; dropping connection", 903 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 904 icl_pdu_free(request); 905 cfiscsi_session_terminate(cs); 906 return; 907 } 908 909 io = cdw->cdw_ctl_io; 910 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 911 ("CTL_FLAG_DATA_IN")); 912 913 done = cfiscsi_handle_data_segment(request, cdw); 914 if (done) { 915 CFISCSI_SESSION_LOCK(cs); 916 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 917 CFISCSI_SESSION_UNLOCK(cs); 918 uma_zfree(cfiscsi_data_wait_zone, cdw); 919 io->scsiio.be_move_done(io); 920 } 921 922 icl_pdu_free(request); 923} 924 925static void 926cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 927{ 928 struct iscsi_bhs_logout_request *bhslr; 929 struct iscsi_bhs_logout_response *bhslr2; 930 struct icl_pdu *response; 931 struct cfiscsi_session *cs; 932 933 cs = PDU_SESSION(request); 934 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 935 switch (bhslr->bhslr_reason & 0x7f) { 936 case BHSLR_REASON_CLOSE_SESSION: 937 case BHSLR_REASON_CLOSE_CONNECTION: 938 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 939 if (response == NULL) { 940 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 941 icl_pdu_free(request); 942 cfiscsi_session_terminate(cs); 943 return; 944 } 945 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 946 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 947 bhslr2->bhslr_flags = 0x80; 948 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 949 bhslr2->bhslr_initiator_task_tag = 950 bhslr->bhslr_initiator_task_tag; 951 icl_pdu_free(request); 952 cfiscsi_pdu_queue(response); 953 cfiscsi_session_terminate(cs); 954 break; 955 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 956 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 957 if (response == NULL) { 958 CFISCSI_SESSION_WARN(cs, 959 "failed to allocate memory; dropping connection"); 960 icl_pdu_free(request); 961 cfiscsi_session_terminate(cs); 962 return; 963 } 964 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 965 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 966 bhslr2->bhslr_flags = 0x80; 967 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 968 bhslr2->bhslr_initiator_task_tag = 969 bhslr->bhslr_initiator_task_tag; 970 icl_pdu_free(request); 971 cfiscsi_pdu_queue(response); 972 break; 973 default: 974 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 975 bhslr->bhslr_reason); 976 icl_pdu_free(request); 977 cfiscsi_session_terminate(cs); 978 break; 979 } 980} 981 982static void 983cfiscsi_callout(void *context) 984{ 985 struct icl_pdu *cp; 986 struct iscsi_bhs_nop_in *bhsni; 987 struct cfiscsi_session *cs; 988 989 cs = context; 990 991 if (cs->cs_terminating) 992 return; 993 994 callout_schedule(&cs->cs_callout, 1 * hz); 995 996 atomic_add_int(&cs->cs_timeout, 1); 997 998#ifdef ICL_KERNEL_PROXY 999 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1000 if (cs->cs_timeout > login_timeout) { 1001 CFISCSI_SESSION_WARN(cs, "login timed out after " 1002 "%d seconds; dropping connection", cs->cs_timeout); 1003 cfiscsi_session_terminate(cs); 1004 } 1005 return; 1006 } 1007#endif 1008 1009 if (cs->cs_timeout >= ping_timeout) { 1010 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1011 "dropping connection", ping_timeout); 1012 cfiscsi_session_terminate(cs); 1013 return; 1014 } 1015 1016 /* 1017 * If the ping was reset less than one second ago - which means 1018 * that we've received some PDU during the last second - assume 1019 * the traffic flows correctly and don't bother sending a NOP-Out. 1020 * 1021 * (It's 2 - one for one second, and one for incrementing is_timeout 1022 * earlier in this routine.) 1023 */ 1024 if (cs->cs_timeout < 2) 1025 return; 1026 1027 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1028 if (cp == NULL) { 1029 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1030 return; 1031 } 1032 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1033 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1034 bhsni->bhsni_flags = 0x80; 1035 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1036 1037 cfiscsi_pdu_queue(cp); 1038} 1039 1040static void 1041cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1042{ 1043 struct cfiscsi_data_wait *cdw, *tmpcdw; 1044 union ctl_io *io; 1045 int error, last; 1046 1047#ifdef notyet 1048 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1049 if (io == NULL) { 1050 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1051 return; 1052 } 1053 ctl_zero_io(io); 1054 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1055 io->io_hdr.io_type = CTL_IO_TASK; 1056 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1057 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1058 io->io_hdr.nexus.targ_target.id = 0; 1059 io->io_hdr.nexus.targ_lun = lun; 1060 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1061 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1062 error = ctl_queue(io); 1063 if (error != CTL_RETVAL_COMPLETE) { 1064 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1065 ctl_free_io(io); 1066 } 1067#else 1068 /* 1069 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1070 * just iterate over tasks that are waiting for something - data - and 1071 * terminate those. 1072 */ 1073 CFISCSI_SESSION_LOCK(cs); 1074 TAILQ_FOREACH_SAFE(cdw, 1075 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1076 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1077 if (io == NULL) { 1078 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1079 return; 1080 } 1081 ctl_zero_io(io); 1082 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1083 io->io_hdr.io_type = CTL_IO_TASK; 1084 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1085 io->io_hdr.nexus.targ_port = 1086 cs->cs_target->ct_softc->fe.targ_port; 1087 io->io_hdr.nexus.targ_target.id = 0; 1088 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1089 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1090 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1091 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1092 error = ctl_queue(io); 1093 if (error != CTL_RETVAL_COMPLETE) { 1094 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1095 ctl_free_io(io); 1096 return; 1097 } 1098#if 0 1099 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1100 "0x%x", cdw->cdw_initiator_task_tag); 1101#endif 1102 /* 1103 * Set nonzero port status; this prevents backends from 1104 * assuming that the data transfer actually succeeded 1105 * and writing uninitialized data to disk. 1106 */ 1107 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1108 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1109 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1110 uma_zfree(cfiscsi_data_wait_zone, cdw); 1111 } 1112 CFISCSI_SESSION_UNLOCK(cs); 1113#endif 1114 1115 /* 1116 * Wait for CTL to terminate all the tasks. 1117 */ 1118 for (;;) { 1119 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1120 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1121 if (last != 0) 1122 break; 1123 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, " 1124 "%d remaining", cs->cs_outstanding_ctl_pdus); 1125 pause("cfiscsi_terminate", 1); 1126 } 1127} 1128 1129static void 1130cfiscsi_maintenance_thread(void *arg) 1131{ 1132 struct cfiscsi_session *cs; 1133 1134 cs = arg; 1135 1136 for (;;) { 1137 CFISCSI_SESSION_LOCK(cs); 1138 if (cs->cs_terminating == false) 1139 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1140 CFISCSI_SESSION_UNLOCK(cs); 1141 1142 if (cs->cs_terminating) { 1143 1144 /* 1145 * We used to wait up to 30 seconds to deliver queued 1146 * PDUs to the initiator. We also tried hard to deliver 1147 * SCSI Responses for the aborted PDUs. We don't do 1148 * that anymore. We might need to revisit that. 1149 */ 1150 callout_drain(&cs->cs_callout); 1151 icl_conn_shutdown(cs->cs_conn); 1152 icl_conn_close(cs->cs_conn); 1153 1154 /* 1155 * At this point ICL receive thread is no longer 1156 * running; no new tasks can be queued. 1157 */ 1158 cfiscsi_session_terminate_tasks(cs); 1159 cfiscsi_session_delete(cs); 1160 kthread_exit(); 1161 return; 1162 } 1163 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1164 } 1165} 1166 1167static void 1168cfiscsi_session_terminate(struct cfiscsi_session *cs) 1169{ 1170 1171 if (cs->cs_terminating) 1172 return; 1173 cs->cs_terminating = true; 1174 cv_signal(&cs->cs_maintenance_cv); 1175#ifdef ICL_KERNEL_PROXY 1176 cv_signal(&cs->cs_login_cv); 1177#endif 1178} 1179 1180static int 1181cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1182{ 1183 int error, i; 1184 struct cfiscsi_softc *softc; 1185 1186 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1187 1188 softc = &cfiscsi_softc; 1189 1190 mtx_lock(&softc->lock); 1191 for (i = 0; i < softc->max_initiators; i++) { 1192 if (softc->ctl_initids[i] == 0) 1193 break; 1194 } 1195 if (i == softc->max_initiators) { 1196 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1197 softc->max_initiators); 1198 mtx_unlock(&softc->lock); 1199 return (1); 1200 } 1201 softc->ctl_initids[i] = 1; 1202 mtx_unlock(&softc->lock); 1203 1204#if 0 1205 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1206 i, softc->max_initiators); 1207#endif 1208 cs->cs_ctl_initid = i; 1209 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1210 if (error != 0) { 1211 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1212 mtx_lock(&softc->lock); 1213 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1214 mtx_unlock(&softc->lock); 1215 cs->cs_ctl_initid = -1; 1216 return (1); 1217 } 1218 1219 return (0); 1220} 1221 1222static void 1223cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1224{ 1225 int error; 1226 struct cfiscsi_softc *softc; 1227 1228 if (cs->cs_ctl_initid == -1) 1229 return; 1230 1231 softc = &cfiscsi_softc; 1232 1233 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1234 if (error != 0) { 1235 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1236 error); 1237 } 1238 mtx_lock(&softc->lock); 1239 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1240 mtx_unlock(&softc->lock); 1241 cs->cs_ctl_initid = -1; 1242} 1243 1244static struct cfiscsi_session * 1245cfiscsi_session_new(struct cfiscsi_softc *softc) 1246{ 1247 struct cfiscsi_session *cs; 1248 int error; 1249 1250 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1251 if (cs == NULL) { 1252 CFISCSI_WARN("malloc failed"); 1253 return (NULL); 1254 } 1255 cs->cs_ctl_initid = -1; 1256 1257 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1258 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1259 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1260 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1261#ifdef ICL_KERNEL_PROXY 1262 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1263#endif 1264 1265 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1266 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1267 cs->cs_conn->ic_error = cfiscsi_error_callback; 1268 cs->cs_conn->ic_prv0 = cs; 1269 1270 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1271 if (error != 0) { 1272 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1273 free(cs, M_CFISCSI); 1274 return (NULL); 1275 } 1276 1277 mtx_lock(&softc->lock); 1278 cs->cs_id = softc->last_session_id + 1; 1279 softc->last_session_id++; 1280 mtx_unlock(&softc->lock); 1281 1282 mtx_lock(&softc->lock); 1283 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1284 mtx_unlock(&softc->lock); 1285 1286 /* 1287 * Start pinging the initiator. 1288 */ 1289 callout_init(&cs->cs_callout, 1); 1290 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1291 1292 return (cs); 1293} 1294 1295static void 1296cfiscsi_session_delete(struct cfiscsi_session *cs) 1297{ 1298 struct cfiscsi_softc *softc; 1299 1300 softc = &cfiscsi_softc; 1301 1302 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1303 ("destroying session with outstanding CTL pdus")); 1304 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1305 ("destroying session with non-empty queue")); 1306 1307 cfiscsi_session_unregister_initiator(cs); 1308 if (cs->cs_target != NULL) 1309 cfiscsi_target_release(cs->cs_target); 1310 icl_conn_close(cs->cs_conn); 1311 icl_conn_free(cs->cs_conn); 1312 1313 mtx_lock(&softc->lock); 1314 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1315 mtx_unlock(&softc->lock); 1316 1317 free(cs, M_CFISCSI); 1318} 1319 1320int 1321cfiscsi_init(void) 1322{ 1323 struct cfiscsi_softc *softc; 1324 struct ctl_frontend *fe; 1325 int retval; 1326 1327 softc = &cfiscsi_softc; 1328 retval = 0; 1329 bzero(softc, sizeof(*softc)); 1330 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1331 1332#ifdef ICL_KERNEL_PROXY 1333 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1334#endif 1335 TAILQ_INIT(&softc->sessions); 1336 TAILQ_INIT(&softc->targets); 1337 1338 fe = &softc->fe; 1339 fe->port_type = CTL_PORT_ISCSI; 1340 /* XXX KDM what should the real number be here? */ 1341 fe->num_requested_ctl_io = 4096; 1342 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1343 fe->port_name = softc->port_name; 1344 fe->port_online = cfiscsi_online; 1345 fe->port_offline = cfiscsi_offline; 1346 fe->onoff_arg = softc; 1347 fe->lun_enable = cfiscsi_lun_enable; 1348 fe->lun_disable = cfiscsi_lun_disable; 1349 fe->targ_lun_arg = softc; 1350 fe->ioctl = cfiscsi_ioctl; 1351 fe->devid = cfiscsi_devid; 1352 fe->fe_datamove = cfiscsi_datamove; 1353 fe->fe_done = cfiscsi_done; 1354 1355 /* XXX KDM what should we report here? */ 1356 /* XXX These should probably be fetched from CTL. */ 1357 fe->max_targets = 1; 1358 fe->max_target_id = 15; 1359 1360 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1361 if (retval != 0) { 1362 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1363 retval); 1364 retval = 1; 1365 goto bailout; 1366 } 1367 1368 softc->max_initiators = fe->max_initiators; 1369 1370 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1371 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1372 UMA_ALIGN_PTR, 0); 1373 1374 return (0); 1375 1376bailout: 1377 return (retval); 1378} 1379 1380static int 1381cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1382{ 1383 1384 switch (what) { 1385 case MOD_LOAD: 1386 return (cfiscsi_init()); 1387 case MOD_UNLOAD: 1388 return (EBUSY); 1389 default: 1390 return (EOPNOTSUPP); 1391 } 1392} 1393 1394#ifdef ICL_KERNEL_PROXY 1395static void 1396cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1397{ 1398 struct cfiscsi_session *cs; 1399 1400 cs = cfiscsi_session_new(&cfiscsi_softc); 1401 if (cs == NULL) { 1402 CFISCSI_WARN("failed to create session"); 1403 return; 1404 } 1405 1406 icl_conn_handoff_sock(cs->cs_conn, so); 1407 cs->cs_initiator_sa = sa; 1408 cs->cs_portal_id = portal_id; 1409 cs->cs_waiting_for_ctld = true; 1410 cv_signal(&cfiscsi_softc.accept_cv); 1411} 1412#endif 1413 1414static void 1415cfiscsi_online(void *arg) 1416{ 1417 struct cfiscsi_softc *softc; 1418 1419 softc = (struct cfiscsi_softc *)arg; 1420 1421 softc->online = 1; 1422#ifdef ICL_KERNEL_PROXY 1423 if (softc->listener != NULL) 1424 icl_listen_free(softc->listener); 1425 softc->listener = icl_listen_new(cfiscsi_accept); 1426#endif 1427} 1428 1429static void 1430cfiscsi_offline(void *arg) 1431{ 1432 struct cfiscsi_softc *softc; 1433 struct cfiscsi_session *cs; 1434 1435 softc = (struct cfiscsi_softc *)arg; 1436 1437 softc->online = 0; 1438 1439 mtx_lock(&softc->lock); 1440 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1441 cfiscsi_session_terminate(cs); 1442 mtx_unlock(&softc->lock); 1443 1444#ifdef ICL_KERNEL_PROXY 1445 icl_listen_free(softc->listener); 1446 softc->listener = NULL; 1447#endif 1448} 1449 1450static void 1451cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1452{ 1453 struct cfiscsi_softc *softc; 1454 struct cfiscsi_session *cs; 1455 struct cfiscsi_target *ct; 1456 struct ctl_iscsi_handoff_params *cihp; 1457 int error; 1458 1459 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1460 softc = &cfiscsi_softc; 1461 1462 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1463 cihp->initiator_name, cihp->initiator_addr, 1464 cihp->target_name); 1465 1466 if (softc->online == 0) { 1467 ci->status = CTL_ISCSI_ERROR; 1468 snprintf(ci->error_str, sizeof(ci->error_str), 1469 "%s: port offline", __func__); 1470 return; 1471 } 1472 1473 ct = cfiscsi_target_find(softc, cihp->target_name); 1474 if (ct == NULL) { 1475 ci->status = CTL_ISCSI_ERROR; 1476 snprintf(ci->error_str, sizeof(ci->error_str), 1477 "%s: target not found", __func__); 1478 return; 1479 } 1480 1481#ifdef ICL_KERNEL_PROXY 1482 if (cihp->socket > 0 && cihp->connection_id > 0) { 1483 snprintf(ci->error_str, sizeof(ci->error_str), 1484 "both socket and connection_id set"); 1485 ci->status = CTL_ISCSI_ERROR; 1486 cfiscsi_target_release(ct); 1487 return; 1488 } 1489 if (cihp->socket == 0) { 1490 mtx_lock(&cfiscsi_softc.lock); 1491 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1492 if (cs->cs_id == cihp->socket) 1493 break; 1494 } 1495 if (cs == NULL) { 1496 mtx_unlock(&cfiscsi_softc.lock); 1497 snprintf(ci->error_str, sizeof(ci->error_str), 1498 "connection not found"); 1499 ci->status = CTL_ISCSI_ERROR; 1500 cfiscsi_target_release(ct); 1501 return; 1502 } 1503 mtx_unlock(&cfiscsi_softc.lock); 1504 } else { 1505#endif 1506 cs = cfiscsi_session_new(softc); 1507 if (cs == NULL) { 1508 ci->status = CTL_ISCSI_ERROR; 1509 snprintf(ci->error_str, sizeof(ci->error_str), 1510 "%s: cfiscsi_session_new failed", __func__); 1511 cfiscsi_target_release(ct); 1512 return; 1513 } 1514#ifdef ICL_KERNEL_PROXY 1515 } 1516#endif 1517 cs->cs_target = ct; 1518 1519 /* 1520 * First PDU of Full Feature phase has the same CmdSN as the last 1521 * PDU from the Login Phase received from the initiator. Thus, 1522 * the -1 below. 1523 */ 1524 cs->cs_portal_group_tag = cihp->portal_group_tag; 1525 cs->cs_cmdsn = cihp->cmdsn; 1526 cs->cs_statsn = cihp->statsn; 1527 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1528 cs->cs_max_burst_length = cihp->max_burst_length; 1529 cs->cs_immediate_data = !!cihp->immediate_data; 1530 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1531 cs->cs_conn->ic_header_crc32c = true; 1532 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1533 cs->cs_conn->ic_data_crc32c = true; 1534 1535 strlcpy(cs->cs_initiator_name, 1536 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1537 strlcpy(cs->cs_initiator_addr, 1538 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1539 strlcpy(cs->cs_initiator_alias, 1540 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1541 1542#ifdef ICL_KERNEL_PROXY 1543 if (cihp->socket > 0) { 1544#endif 1545 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1546 if (error != 0) { 1547 cfiscsi_session_delete(cs); 1548 ci->status = CTL_ISCSI_ERROR; 1549 snprintf(ci->error_str, sizeof(ci->error_str), 1550 "%s: icl_conn_handoff failed with error %d", 1551 __func__, error); 1552 return; 1553 } 1554#ifdef ICL_KERNEL_PROXY 1555 } 1556#endif 1557 1558 /* 1559 * Register initiator with CTL. 1560 */ 1561 cfiscsi_session_register_initiator(cs); 1562 1563#ifdef ICL_KERNEL_PROXY 1564 cs->cs_login_phase = false; 1565 1566 /* 1567 * First PDU of the Full Feature phase has likely already arrived. 1568 * We have to pick it up and execute properly. 1569 */ 1570 if (cs->cs_login_pdu != NULL) { 1571 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1572 cfiscsi_pdu_handle(cs->cs_login_pdu); 1573 cs->cs_login_pdu = NULL; 1574 } 1575#endif 1576 1577 ci->status = CTL_ISCSI_OK; 1578} 1579 1580static void 1581cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1582{ 1583 struct ctl_iscsi_list_params *cilp; 1584 struct cfiscsi_session *cs; 1585 struct cfiscsi_softc *softc; 1586 struct sbuf *sb; 1587 int error; 1588 1589 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1590 softc = &cfiscsi_softc; 1591 1592 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1593 if (sb == NULL) { 1594 ci->status = CTL_ISCSI_ERROR; 1595 snprintf(ci->error_str, sizeof(ci->error_str), 1596 "Unable to allocate %d bytes for iSCSI session list", 1597 cilp->alloc_len); 1598 return; 1599 } 1600 1601 sbuf_printf(sb, "<ctlislist>\n"); 1602 mtx_lock(&softc->lock); 1603 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1604#ifdef ICL_KERNEL_PROXY 1605 if (cs->cs_target == NULL) 1606 continue; 1607#endif 1608 error = sbuf_printf(sb, "<connection id=\"%d\">" 1609 "<initiator>%s</initiator>" 1610 "<initiator_addr>%s</initiator_addr>" 1611 "<initiator_alias>%s</initiator_alias>" 1612 "<target>%s</target>" 1613 "<target_alias>%s</target_alias>" 1614 "<header_digest>%s</header_digest>" 1615 "<data_digest>%s</data_digest>" 1616 "<max_data_segment_length>%zd</max_data_segment_length>" 1617 "<immediate_data>%d</immediate_data>" 1618 "<iser>%d</iser>" 1619 "</connection>\n", 1620 cs->cs_id, 1621 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1622 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1623 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1624 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1625 cs->cs_max_data_segment_length, 1626 cs->cs_immediate_data, 1627 cs->cs_conn->ic_iser); 1628 if (error != 0) 1629 break; 1630 } 1631 mtx_unlock(&softc->lock); 1632 error = sbuf_printf(sb, "</ctlislist>\n"); 1633 if (error != 0) { 1634 sbuf_delete(sb); 1635 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1636 snprintf(ci->error_str, sizeof(ci->error_str), 1637 "Out of space, %d bytes is too small", cilp->alloc_len); 1638 return; 1639 } 1640 sbuf_finish(sb); 1641 1642 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1643 cilp->fill_len = sbuf_len(sb) + 1; 1644 ci->status = CTL_ISCSI_OK; 1645 sbuf_delete(sb); 1646} 1647 1648static void 1649cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1650{ 1651 struct icl_pdu *response; 1652 struct iscsi_bhs_asynchronous_message *bhsam; 1653 struct ctl_iscsi_terminate_params *citp; 1654 struct cfiscsi_session *cs; 1655 struct cfiscsi_softc *softc; 1656 int found = 0; 1657 1658 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1659 softc = &cfiscsi_softc; 1660 1661 mtx_lock(&softc->lock); 1662 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1663 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1664 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1665 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1666 continue; 1667 1668 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1669 if (response == NULL) { 1670 /* 1671 * Oh well. Just terminate the connection. 1672 */ 1673 } else { 1674 bhsam = (struct iscsi_bhs_asynchronous_message *) 1675 response->ip_bhs; 1676 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1677 bhsam->bhsam_flags = 0x80; 1678 bhsam->bhsam_0xffffffff = 0xffffffff; 1679 bhsam->bhsam_async_event = 1680 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1681 cfiscsi_pdu_queue(response); 1682 } 1683 cfiscsi_session_terminate(cs); 1684 found++; 1685 } 1686 mtx_unlock(&softc->lock); 1687 1688 if (found == 0) { 1689 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1690 snprintf(ci->error_str, sizeof(ci->error_str), 1691 "No matching connections found"); 1692 return; 1693 } 1694 1695 ci->status = CTL_ISCSI_OK; 1696} 1697 1698static void 1699cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1700{ 1701 struct icl_pdu *response; 1702 struct iscsi_bhs_asynchronous_message *bhsam; 1703 struct ctl_iscsi_logout_params *cilp; 1704 struct cfiscsi_session *cs; 1705 struct cfiscsi_softc *softc; 1706 int found = 0; 1707 1708 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1709 softc = &cfiscsi_softc; 1710 1711 mtx_lock(&softc->lock); 1712 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1713 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1714 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1715 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1716 continue; 1717 1718 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1719 if (response == NULL) { 1720 ci->status = CTL_ISCSI_ERROR; 1721 snprintf(ci->error_str, sizeof(ci->error_str), 1722 "Unable to allocate memory"); 1723 mtx_unlock(&softc->lock); 1724 return; 1725 } 1726 bhsam = 1727 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1728 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1729 bhsam->bhsam_flags = 0x80; 1730 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1731 bhsam->bhsam_parameter3 = htons(10); 1732 cfiscsi_pdu_queue(response); 1733 found++; 1734 } 1735 mtx_unlock(&softc->lock); 1736 1737 if (found == 0) { 1738 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1739 snprintf(ci->error_str, sizeof(ci->error_str), 1740 "No matching connections found"); 1741 return; 1742 } 1743 1744 ci->status = CTL_ISCSI_OK; 1745} 1746 1747#ifdef ICL_KERNEL_PROXY 1748static void 1749cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1750{ 1751 struct ctl_iscsi_listen_params *cilp; 1752 struct sockaddr *sa; 1753 int error; 1754 1755 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1756 1757 if (cfiscsi_softc.listener == NULL) { 1758 CFISCSI_DEBUG("no listener"); 1759 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1760 ci->status = CTL_ISCSI_ERROR; 1761 return; 1762 } 1763 1764 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1765 if (error != 0) { 1766 CFISCSI_DEBUG("getsockaddr, error %d", error); 1767 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1768 ci->status = CTL_ISCSI_ERROR; 1769 return; 1770 } 1771 1772 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1773 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1774 if (error != 0) { 1775 free(sa, M_SONAME); 1776 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1777 snprintf(ci->error_str, sizeof(ci->error_str), 1778 "icl_listen_add failed, error %d", error); 1779 ci->status = CTL_ISCSI_ERROR; 1780 return; 1781 } 1782 1783 ci->status = CTL_ISCSI_OK; 1784} 1785 1786static void 1787cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1788{ 1789 struct ctl_iscsi_accept_params *ciap; 1790 struct cfiscsi_session *cs; 1791 int error; 1792 1793 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1794 1795 mtx_lock(&cfiscsi_softc.lock); 1796 for (;;) { 1797 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1798 if (cs->cs_waiting_for_ctld) 1799 break; 1800 } 1801 if (cs != NULL) 1802 break; 1803 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1804 if (error != 0) { 1805 mtx_unlock(&cfiscsi_softc.lock); 1806 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1807 ci->status = CTL_ISCSI_ERROR; 1808 return; 1809 } 1810 } 1811 mtx_unlock(&cfiscsi_softc.lock); 1812 1813 cs->cs_waiting_for_ctld = false; 1814 cs->cs_login_phase = true; 1815 1816 ciap->connection_id = cs->cs_id; 1817 ciap->portal_id = cs->cs_portal_id; 1818 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1819 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1820 cs->cs_initiator_sa->sa_len); 1821 if (error != 0) { 1822 snprintf(ci->error_str, sizeof(ci->error_str), 1823 "copyout failed with error %d", error); 1824 ci->status = CTL_ISCSI_ERROR; 1825 return; 1826 } 1827 1828 ci->status = CTL_ISCSI_OK; 1829} 1830 1831static void 1832cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1833{ 1834 struct ctl_iscsi_send_params *cisp; 1835 struct cfiscsi_session *cs; 1836 struct icl_pdu *ip; 1837 size_t datalen; 1838 void *data; 1839 int error; 1840 1841 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1842 1843 mtx_lock(&cfiscsi_softc.lock); 1844 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1845 if (cs->cs_id == cisp->connection_id) 1846 break; 1847 } 1848 if (cs == NULL) { 1849 mtx_unlock(&cfiscsi_softc.lock); 1850 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1851 ci->status = CTL_ISCSI_ERROR; 1852 return; 1853 } 1854 mtx_unlock(&cfiscsi_softc.lock); 1855 1856#if 0 1857 if (cs->cs_login_phase == false) 1858 return (EBUSY); 1859#endif 1860 1861 if (cs->cs_terminating) { 1862 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1863 ci->status = CTL_ISCSI_ERROR; 1864 return; 1865 } 1866 1867 datalen = cisp->data_segment_len; 1868 /* 1869 * XXX 1870 */ 1871 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1872 if (datalen > 65535) { 1873 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1874 ci->status = CTL_ISCSI_ERROR; 1875 return; 1876 } 1877 if (datalen > 0) { 1878 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1879 error = copyin(cisp->data_segment, data, datalen); 1880 if (error != 0) { 1881 free(data, M_CFISCSI); 1882 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1883 ci->status = CTL_ISCSI_ERROR; 1884 return; 1885 } 1886 } 1887 1888 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1889 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1890 if (datalen > 0) { 1891 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1892 free(data, M_CFISCSI); 1893 } 1894 CFISCSI_SESSION_LOCK(cs); 1895 icl_pdu_queue(ip); 1896 CFISCSI_SESSION_UNLOCK(cs); 1897 ci->status = CTL_ISCSI_OK; 1898} 1899 1900static void 1901cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1902{ 1903 struct ctl_iscsi_receive_params *cirp; 1904 struct cfiscsi_session *cs; 1905 struct icl_pdu *ip; 1906 void *data; 1907 int error; 1908 1909 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1910 1911 mtx_lock(&cfiscsi_softc.lock); 1912 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1913 if (cs->cs_id == cirp->connection_id) 1914 break; 1915 } 1916 if (cs == NULL) { 1917 mtx_unlock(&cfiscsi_softc.lock); 1918 snprintf(ci->error_str, sizeof(ci->error_str), 1919 "connection not found"); 1920 ci->status = CTL_ISCSI_ERROR; 1921 return; 1922 } 1923 mtx_unlock(&cfiscsi_softc.lock); 1924 1925#if 0 1926 if (is->is_login_phase == false) 1927 return (EBUSY); 1928#endif 1929 1930 CFISCSI_SESSION_LOCK(cs); 1931 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1932 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1933 if (error != 0) { 1934 CFISCSI_SESSION_UNLOCK(cs); 1935 snprintf(ci->error_str, sizeof(ci->error_str), 1936 "interrupted by signal"); 1937 ci->status = CTL_ISCSI_ERROR; 1938 return; 1939 } 1940 } 1941 1942 if (cs->cs_terminating) { 1943 CFISCSI_SESSION_UNLOCK(cs); 1944 snprintf(ci->error_str, sizeof(ci->error_str), 1945 "connection terminating"); 1946 ci->status = CTL_ISCSI_ERROR; 1947 return; 1948 } 1949 ip = cs->cs_login_pdu; 1950 cs->cs_login_pdu = NULL; 1951 CFISCSI_SESSION_UNLOCK(cs); 1952 1953 if (ip->ip_data_len > cirp->data_segment_len) { 1954 icl_pdu_free(ip); 1955 snprintf(ci->error_str, sizeof(ci->error_str), 1956 "data segment too big"); 1957 ci->status = CTL_ISCSI_ERROR; 1958 return; 1959 } 1960 1961 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1962 if (ip->ip_data_len > 0) { 1963 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1964 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1965 copyout(data, cirp->data_segment, ip->ip_data_len); 1966 free(data, M_CFISCSI); 1967 } 1968 1969 icl_pdu_free(ip); 1970 ci->status = CTL_ISCSI_OK; 1971} 1972 1973#endif /* !ICL_KERNEL_PROXY */ 1974 1975static int 1976cfiscsi_ioctl(struct cdev *dev, 1977 u_long cmd, caddr_t addr, int flag, struct thread *td) 1978{ 1979 struct ctl_iscsi *ci; 1980 1981 if (cmd != CTL_ISCSI) 1982 return (ENOTTY); 1983 1984 ci = (struct ctl_iscsi *)addr; 1985 switch (ci->type) { 1986 case CTL_ISCSI_HANDOFF: 1987 cfiscsi_ioctl_handoff(ci); 1988 break; 1989 case CTL_ISCSI_LIST: 1990 cfiscsi_ioctl_list(ci); 1991 break; 1992 case CTL_ISCSI_TERMINATE: 1993 cfiscsi_ioctl_terminate(ci); 1994 break; 1995 case CTL_ISCSI_LOGOUT: 1996 cfiscsi_ioctl_logout(ci); 1997 break; 1998#ifdef ICL_KERNEL_PROXY 1999 case CTL_ISCSI_LISTEN: 2000 cfiscsi_ioctl_listen(ci); 2001 break; 2002 case CTL_ISCSI_ACCEPT: 2003 cfiscsi_ioctl_accept(ci); 2004 break; 2005 case CTL_ISCSI_SEND: 2006 cfiscsi_ioctl_send(ci); 2007 break; 2008 case CTL_ISCSI_RECEIVE: 2009 cfiscsi_ioctl_receive(ci); 2010 break; 2011#else 2012 case CTL_ISCSI_LISTEN: 2013 case CTL_ISCSI_ACCEPT: 2014 case CTL_ISCSI_SEND: 2015 case CTL_ISCSI_RECEIVE: 2016 ci->status = CTL_ISCSI_ERROR; 2017 snprintf(ci->error_str, sizeof(ci->error_str), 2018 "%s: CTL compiled without ICL_KERNEL_PROXY", 2019 __func__); 2020 break; 2021#endif /* !ICL_KERNEL_PROXY */ 2022 default: 2023 ci->status = CTL_ISCSI_ERROR; 2024 snprintf(ci->error_str, sizeof(ci->error_str), 2025 "%s: invalid iSCSI request type %d", __func__, ci->type); 2026 break; 2027 } 2028 2029 return (0); 2030} 2031 2032static int 2033cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 2034{ 2035 struct cfiscsi_session *cs; 2036 struct scsi_vpd_device_id *devid_ptr; 2037 struct scsi_vpd_id_descriptor *desc, *desc1, *desc2, *desc3, *desc4; 2038 struct scsi_vpd_id_descriptor *desc5; 2039 struct scsi_vpd_id_t10 *t10id; 2040 struct ctl_lun *lun; 2041 const struct icl_pdu *request; 2042 int i, ret; 2043 char *val; 2044 size_t data_len, devid_len, wwnn_len, wwpn_len, lun_name_len; 2045 2046 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 2047 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2048 cs = PDU_SESSION(request); 2049 2050 wwpn_len = strlen(cs->cs_target->ct_name); 2051 wwpn_len += strlen(",t,0x0001"); 2052 wwpn_len += 1; /* '\0' */ 2053 if ((wwpn_len % 4) != 0) 2054 wwpn_len += (4 - (wwpn_len % 4)); 2055 2056 wwnn_len = strlen(cs->cs_target->ct_name); 2057 wwnn_len += 1; /* '\0' */ 2058 if ((wwnn_len % 4) != 0) 2059 wwnn_len += (4 - (wwnn_len % 4)); 2060 2061 if (lun == NULL) { 2062 devid_len = CTL_DEVID_MIN_LEN; 2063 lun_name_len = 0; 2064 } else { 2065 devid_len = max(CTL_DEVID_MIN_LEN, 2066 strnlen(lun->be_lun->device_id, CTL_DEVID_LEN)); 2067 lun_name_len = strlen(cs->cs_target->ct_name); 2068 lun_name_len += strlen(",lun,XXXXXXXX"); 2069 lun_name_len += 1; /* '\0' */ 2070 if ((lun_name_len % 4) != 0) 2071 lun_name_len += (4 - (lun_name_len % 4)); 2072 } 2073 2074 data_len = sizeof(struct scsi_vpd_device_id) + 2075 sizeof(struct scsi_vpd_id_descriptor) + 2076 sizeof(struct scsi_vpd_id_t10) + devid_len + 2077 sizeof(struct scsi_vpd_id_descriptor) + lun_name_len + 2078 sizeof(struct scsi_vpd_id_descriptor) + wwnn_len + 2079 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 2080 sizeof(struct scsi_vpd_id_descriptor) + 2081 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 2082 sizeof(struct scsi_vpd_id_descriptor) + 2083 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 2084 2085 ctsio->kern_data_ptr = malloc(data_len, M_CTL, M_WAITOK | M_ZERO); 2086 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 2087 ctsio->kern_sg_entries = 0; 2088 2089 if (data_len < alloc_len) { 2090 ctsio->residual = alloc_len - data_len; 2091 ctsio->kern_data_len = data_len; 2092 ctsio->kern_total_len = data_len; 2093 } else { 2094 ctsio->residual = 0; 2095 ctsio->kern_data_len = alloc_len; 2096 ctsio->kern_total_len = alloc_len; 2097 } 2098 ctsio->kern_data_resid = 0; 2099 ctsio->kern_rel_offset = 0; 2100 ctsio->kern_sg_entries = 0; 2101 2102 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2103 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2104 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2105 sizeof(struct scsi_vpd_id_t10) + devid_len); 2106 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2107 lun_name_len); 2108 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2109 wwnn_len); 2110 desc4 = (struct scsi_vpd_id_descriptor *)(&desc3->identifier[0] + 2111 wwpn_len); 2112 desc5 = (struct scsi_vpd_id_descriptor *)(&desc4->identifier[0] + 2113 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2114 2115 if (lun != NULL) 2116 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2117 lun->be_lun->lun_type; 2118 else 2119 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2120 2121 devid_ptr->page_code = SVPD_DEVICE_ID; 2122 2123 scsi_ulto2b(data_len - 4, devid_ptr->length); 2124 2125 /* 2126 * We're using a LUN association here. i.e., this device ID is a 2127 * per-LUN identifier. 2128 */ 2129 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2130 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2131 desc->length = sizeof(*t10id) + devid_len; 2132 if (lun == NULL || (val = ctl_get_opt(lun->be_lun, "vendor")) == NULL) { 2133 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2134 } else { 2135 memset(t10id->vendor, ' ', sizeof(t10id->vendor)); 2136 strncpy(t10id->vendor, val, 2137 min(sizeof(t10id->vendor), strlen(val))); 2138 } 2139 2140 /* 2141 * If we've actually got a backend, copy the device id from the 2142 * per-LUN data. Otherwise, set it to all spaces. 2143 */ 2144 if (lun != NULL) { 2145 /* 2146 * Copy the backend's LUN ID. 2147 */ 2148 strncpy((char *)t10id->vendor_spec_id, 2149 (char *)lun->be_lun->device_id, devid_len); 2150 } else { 2151 /* 2152 * No backend, set this to spaces. 2153 */ 2154 memset(t10id->vendor_spec_id, 0x20, devid_len); 2155 } 2156 2157 /* 2158 * desc1 is for the unique LUN name. 2159 * 2160 * XXX: According to SPC-3, LUN must report the same ID through 2161 * all the ports. The code below, however, reports the 2162 * ID only via iSCSI. 2163 */ 2164 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2165 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | 2166 SVPD_ID_TYPE_SCSI_NAME; 2167 desc1->length = lun_name_len; 2168 if (lun != NULL) { 2169 /* 2170 * Find the per-target LUN number. 2171 */ 2172 for (i = 0; i < CTL_MAX_LUNS; i++) { 2173 if (cs->cs_target->ct_luns[i] == lun->lun) 2174 break; 2175 } 2176 KASSERT(i < CTL_MAX_LUNS, 2177 ("lun %jd not found", (uintmax_t)lun->lun)); 2178 ret = snprintf(desc1->identifier, lun_name_len, "%s,lun,%d", 2179 cs->cs_target->ct_name, i); 2180 KASSERT(ret > 0 && ret <= lun_name_len, ("bad snprintf")); 2181 } else { 2182 KASSERT(lun_name_len == 0, ("no lun, but lun_name_len != 0")); 2183 } 2184 2185 /* 2186 * desc2 is for the Target Name. 2187 */ 2188 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2189 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2190 SVPD_ID_TYPE_SCSI_NAME; 2191 desc2->length = wwnn_len; 2192 snprintf(desc2->identifier, wwnn_len, "%s", cs->cs_target->ct_name); 2193 2194 /* 2195 * desc3 is for the WWPN which is a port asscociation. 2196 */ 2197 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2198 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2199 SVPD_ID_TYPE_SCSI_NAME; 2200 desc3->length = wwpn_len; 2201 snprintf(desc3->identifier, wwpn_len, "%s,t,0x%4.4x", 2202 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2203 2204 /* 2205 * desc3 is for the Relative Target Port(type 4h) identifier 2206 */ 2207 desc4->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2208 desc4->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2209 SVPD_ID_TYPE_RELTARG; 2210 desc4->length = 4; 2211 desc4->identifier[3] = 1; 2212 2213 /* 2214 * desc4 is for the Target Port Group(type 5h) identifier 2215 */ 2216 desc5->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2217 desc5->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2218 SVPD_ID_TYPE_TPORTGRP; 2219 desc5->length = 4; 2220 desc5->identifier[3] = 1; 2221 2222 ctsio->scsi_status = SCSI_STATUS_OK; 2223 2224 ctsio->io_hdr.flags |= CTL_FLAG_ALLOCATED; 2225 ctsio->be_move_done = ctl_config_move_done; 2226 ctl_datamove((union ctl_io *)ctsio); 2227 2228 return (CTL_RETVAL_COMPLETE); 2229} 2230 2231static void 2232cfiscsi_target_hold(struct cfiscsi_target *ct) 2233{ 2234 2235 refcount_acquire(&ct->ct_refcount); 2236} 2237 2238static void 2239cfiscsi_target_release(struct cfiscsi_target *ct) 2240{ 2241 struct cfiscsi_softc *softc; 2242 2243 softc = ct->ct_softc; 2244 mtx_lock(&softc->lock); 2245 if (refcount_release(&ct->ct_refcount)) { 2246 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2247 mtx_unlock(&softc->lock); 2248 free(ct, M_CFISCSI); 2249 2250 return; 2251 } 2252 mtx_unlock(&softc->lock); 2253} 2254 2255static struct cfiscsi_target * 2256cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2257{ 2258 struct cfiscsi_target *ct; 2259 2260 mtx_lock(&softc->lock); 2261 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2262 if (strcmp(name, ct->ct_name) != 0) 2263 continue; 2264 cfiscsi_target_hold(ct); 2265 mtx_unlock(&softc->lock); 2266 return (ct); 2267 } 2268 mtx_unlock(&softc->lock); 2269 2270 return (NULL); 2271} 2272 2273static struct cfiscsi_target * 2274cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2275 const char *alias) 2276{ 2277 struct cfiscsi_target *ct, *newct; 2278 int i; 2279 2280 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2281 return (NULL); 2282 2283 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2284 2285 mtx_lock(&softc->lock); 2286 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2287 if (strcmp(name, ct->ct_name) != 0) 2288 continue; 2289 cfiscsi_target_hold(ct); 2290 mtx_unlock(&softc->lock); 2291 free(newct, M_CFISCSI); 2292 return (ct); 2293 } 2294 2295 for (i = 0; i < CTL_MAX_LUNS; i++) 2296 newct->ct_luns[i] = -1; 2297 2298 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2299 if (alias != NULL) 2300 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2301 refcount_init(&newct->ct_refcount, 1); 2302 newct->ct_softc = softc; 2303 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2304 mtx_unlock(&softc->lock); 2305 2306 return (newct); 2307} 2308 2309/* 2310 * Takes LUN from the target space and returns LUN from the CTL space. 2311 */ 2312static uint32_t 2313cfiscsi_map_lun(void *arg, uint32_t lun) 2314{ 2315 struct cfiscsi_session *cs; 2316 2317 cs = arg; 2318 2319 if (lun >= CTL_MAX_LUNS) { 2320 CFISCSI_DEBUG("requested lun number %d is higher " 2321 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2322 return (0xffffffff); 2323 } 2324 2325 if (cs->cs_target->ct_luns[lun] < 0) 2326 return (0xffffffff); 2327 2328 return (cs->cs_target->ct_luns[lun]); 2329} 2330 2331static int 2332cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2333 unsigned long lun_id, unsigned long ctl_lun_id) 2334{ 2335 2336 if (lun_id >= CTL_MAX_LUNS) { 2337 CFISCSI_WARN("requested lun number %ld is higher " 2338 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2339 return (-1); 2340 } 2341 2342 if (ct->ct_luns[lun_id] >= 0) { 2343 /* 2344 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2345 * when the LUN is created, and a second time just before 2346 * the port is brought online; don't emit warnings 2347 * for that case. 2348 */ 2349 if (ct->ct_luns[lun_id] == ctl_lun_id) 2350 return (0); 2351 CFISCSI_WARN("lun %ld already allocated", lun_id); 2352 return (-1); 2353 } 2354 2355#if 0 2356 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2357 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2358#endif 2359 2360 ct->ct_luns[lun_id] = ctl_lun_id; 2361 cfiscsi_target_hold(ct); 2362 2363 return (0); 2364} 2365 2366static int 2367cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2368{ 2369 2370 if (ct->ct_luns[lun_id] < 0) { 2371 CFISCSI_WARN("lun %ld not allocated", lun_id); 2372 return (-1); 2373 } 2374 2375 ct->ct_luns[lun_id] = -1; 2376 cfiscsi_target_release(ct); 2377 2378 return (0); 2379} 2380 2381static int 2382cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2383{ 2384 struct cfiscsi_softc *softc; 2385 struct cfiscsi_target *ct; 2386 const char *target = NULL, *target_alias = NULL; 2387 const char *lun = NULL; 2388 unsigned long tmp; 2389 2390 softc = (struct cfiscsi_softc *)arg; 2391 2392 target = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun, 2393 "cfiscsi_target"); 2394 target_alias = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun, 2395 "cfiscsi_target_alias"); 2396 lun = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun, 2397 "cfiscsi_lun"); 2398 2399 if (target == NULL && lun == NULL) 2400 return (0); 2401 2402 if (target == NULL || lun == NULL) { 2403 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2404 "cfiscsi_lun, or the other way around; ignoring"); 2405 return (0); 2406 } 2407 2408 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2409 if (ct == NULL) { 2410 CFISCSI_WARN("failed to create target \"%s\"", target); 2411 return (0); 2412 } 2413 2414 tmp = strtoul(lun, NULL, 10); 2415 cfiscsi_target_set_lun(ct, tmp, lun_id); 2416 cfiscsi_target_release(ct); 2417 return (0); 2418} 2419 2420static int 2421cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2422{ 2423 struct cfiscsi_softc *softc; 2424 struct cfiscsi_target *ct; 2425 int i; 2426 2427 softc = (struct cfiscsi_softc *)arg; 2428 2429 mtx_lock(&softc->lock); 2430 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2431 for (i = 0; i < CTL_MAX_LUNS; i++) { 2432 if (ct->ct_luns[i] < 0) 2433 continue; 2434 if (ct->ct_luns[i] != lun_id) 2435 continue; 2436 mtx_unlock(&softc->lock); 2437 cfiscsi_target_unset_lun(ct, i); 2438 return (0); 2439 } 2440 } 2441 mtx_unlock(&softc->lock); 2442 return (0); 2443} 2444 2445static void 2446cfiscsi_datamove_in(union ctl_io *io) 2447{ 2448 struct cfiscsi_session *cs; 2449 struct icl_pdu *request, *response; 2450 const struct iscsi_bhs_scsi_command *bhssc; 2451 struct iscsi_bhs_data_in *bhsdi; 2452 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2453 size_t len, expected_len, sg_len, buffer_offset; 2454 const char *sg_addr; 2455 int ctl_sg_count, error, i; 2456 2457 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2458 cs = PDU_SESSION(request); 2459 2460 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2461 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2462 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2463 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2464 2465 if (io->scsiio.kern_sg_entries > 0) { 2466 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2467 ctl_sg_count = io->scsiio.kern_sg_entries; 2468 } else { 2469 ctl_sglist = &ctl_sg_entry; 2470 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2471 ctl_sglist->len = io->scsiio.kern_data_len; 2472 ctl_sg_count = 1; 2473 } 2474 2475 /* 2476 * This is the total amount of data to be transferred within the current 2477 * SCSI command. We need to record it so that we can properly report 2478 * underflow/underflow. 2479 */ 2480 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2481 2482 /* 2483 * This is the offset within the current SCSI command; for the first 2484 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2485 * it will be the sum of lengths of previous ones. 2486 */ 2487 buffer_offset = io->scsiio.kern_rel_offset; 2488 2489 /* 2490 * This is the transfer length expected by the initiator. In theory, 2491 * it could be different from the correct amount of data from the SCSI 2492 * point of view, even if that doesn't make any sense. 2493 */ 2494 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2495#if 0 2496 if (expected_len != io->scsiio.kern_total_len) { 2497 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2498 "actual length %zd", expected_len, 2499 (size_t)io->scsiio.kern_total_len); 2500 } 2501#endif 2502 2503 if (buffer_offset >= expected_len) { 2504#if 0 2505 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2506 "already sent the expected len", buffer_offset); 2507#endif 2508 io->scsiio.be_move_done(io); 2509 return; 2510 } 2511 2512 i = 0; 2513 sg_addr = NULL; 2514 sg_len = 0; 2515 response = NULL; 2516 bhsdi = NULL; 2517 for (;;) { 2518 if (response == NULL) { 2519 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2520 if (response == NULL) { 2521 CFISCSI_SESSION_WARN(cs, "failed to " 2522 "allocate memory; dropping connection"); 2523 ctl_set_busy(&io->scsiio); 2524 io->scsiio.be_move_done(io); 2525 cfiscsi_session_terminate(cs); 2526 return; 2527 } 2528 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2529 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2530 bhsdi->bhsdi_initiator_task_tag = 2531 bhssc->bhssc_initiator_task_tag; 2532 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2533 PDU_EXPDATASN(request)++; 2534 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2535 } 2536 2537 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2538 if (sg_len == 0) { 2539 sg_addr = ctl_sglist[i].addr; 2540 sg_len = ctl_sglist[i].len; 2541 KASSERT(sg_len > 0, ("sg_len <= 0")); 2542 } 2543 2544 len = sg_len; 2545 2546 /* 2547 * Truncate to maximum data segment length. 2548 */ 2549 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2550 ("ip_data_len %zd >= max_data_segment_length %zd", 2551 response->ip_data_len, cs->cs_max_data_segment_length)); 2552 if (response->ip_data_len + len > 2553 cs->cs_max_data_segment_length) { 2554 len = cs->cs_max_data_segment_length - 2555 response->ip_data_len; 2556 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2557 len, sg_len)); 2558 } 2559 2560 /* 2561 * Truncate to expected data transfer length. 2562 */ 2563 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2564 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2565 buffer_offset, response->ip_data_len, expected_len)); 2566 if (buffer_offset + response->ip_data_len + len > expected_len) { 2567 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2568 "to expected data transfer length %zd", 2569 buffer_offset + response->ip_data_len + len, expected_len); 2570 len = expected_len - (buffer_offset + response->ip_data_len); 2571 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2572 len, sg_len)); 2573 } 2574 2575 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2576 if (error != 0) { 2577 CFISCSI_SESSION_WARN(cs, "failed to " 2578 "allocate memory; dropping connection"); 2579 icl_pdu_free(response); 2580 ctl_set_busy(&io->scsiio); 2581 io->scsiio.be_move_done(io); 2582 cfiscsi_session_terminate(cs); 2583 return; 2584 } 2585 sg_addr += len; 2586 sg_len -= len; 2587 2588 KASSERT(buffer_offset + request->ip_data_len <= expected_len, 2589 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2590 buffer_offset, request->ip_data_len, expected_len)); 2591 if (buffer_offset + request->ip_data_len == expected_len) { 2592 /* 2593 * Already have the amount of data the initiator wanted. 2594 */ 2595 break; 2596 } 2597 2598 if (sg_len == 0) { 2599 /* 2600 * End of scatter-gather segment; 2601 * proceed to the next one... 2602 */ 2603 if (i == ctl_sg_count - 1) { 2604 /* 2605 * ... unless this was the last one. 2606 */ 2607 break; 2608 } 2609 i++; 2610 } 2611 2612 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2613 /* 2614 * Can't stuff more data into the current PDU; 2615 * queue it. Note that's not enough to check 2616 * for kern_data_resid == 0 instead; there 2617 * may be several Data-In PDUs for the final 2618 * call to cfiscsi_datamove(), and we want 2619 * to set the F flag only on the last of them. 2620 */ 2621 buffer_offset += response->ip_data_len; 2622 if (buffer_offset == io->scsiio.kern_total_len || 2623 buffer_offset == expected_len) 2624 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2625 cfiscsi_pdu_queue(response); 2626 response = NULL; 2627 bhsdi = NULL; 2628 } 2629 } 2630 if (response != NULL) { 2631 buffer_offset += response->ip_data_len; 2632 if (buffer_offset == io->scsiio.kern_total_len || 2633 buffer_offset == expected_len) 2634 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2635 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2636 cfiscsi_pdu_queue(response); 2637 } 2638 2639 io->scsiio.be_move_done(io); 2640} 2641 2642static void 2643cfiscsi_datamove_out(union ctl_io *io) 2644{ 2645 struct cfiscsi_session *cs; 2646 struct icl_pdu *request, *response; 2647 const struct iscsi_bhs_scsi_command *bhssc; 2648 struct iscsi_bhs_r2t *bhsr2t; 2649 struct cfiscsi_data_wait *cdw; 2650 uint32_t target_transfer_tag; 2651 bool done; 2652 2653 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2654 cs = PDU_SESSION(request); 2655 2656 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2657 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2658 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2659 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2660 2661 /* 2662 * We need to record it so that we can properly report 2663 * underflow/underflow. 2664 */ 2665 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2666 2667 /* 2668 * We hadn't received anything during this datamove yet. 2669 */ 2670 io->scsiio.ext_data_filled = 0; 2671 2672 target_transfer_tag = 2673 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2674 2675#if 0 2676 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2677 "task tag 0x%x, target transfer tag 0x%x", 2678 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2679#endif 2680 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2681 if (cdw == NULL) { 2682 CFISCSI_SESSION_WARN(cs, "failed to " 2683 "allocate memory; dropping connection"); 2684 ctl_set_busy(&io->scsiio); 2685 io->scsiio.be_move_done(io); 2686 cfiscsi_session_terminate(cs); 2687 return; 2688 } 2689 cdw->cdw_ctl_io = io; 2690 cdw->cdw_target_transfer_tag = target_transfer_tag; 2691 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2692 2693 if (cs->cs_immediate_data && io->scsiio.kern_rel_offset < 2694 icl_pdu_data_segment_length(request)) { 2695 done = cfiscsi_handle_data_segment(request, cdw); 2696 if (done) { 2697 uma_zfree(cfiscsi_data_wait_zone, cdw); 2698 io->scsiio.be_move_done(io); 2699 return; 2700 } 2701 } 2702 2703 CFISCSI_SESSION_LOCK(cs); 2704 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2705 CFISCSI_SESSION_UNLOCK(cs); 2706 2707 /* 2708 * XXX: We should limit the number of outstanding R2T PDUs 2709 * per task to MaxOutstandingR2T. 2710 */ 2711 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2712 if (response == NULL) { 2713 CFISCSI_SESSION_WARN(cs, "failed to " 2714 "allocate memory; dropping connection"); 2715 ctl_set_busy(&io->scsiio); 2716 io->scsiio.be_move_done(io); 2717 cfiscsi_session_terminate(cs); 2718 return; 2719 } 2720 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2721 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2722 bhsr2t->bhsr2t_flags = 0x80; 2723 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2724 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2725 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2726 /* 2727 * XXX: Here we assume that cfiscsi_datamove() won't ever 2728 * be running concurrently on several CPUs for a given 2729 * command. 2730 */ 2731 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2732 PDU_R2TSN(request)++; 2733 /* 2734 * This is the offset within the current SCSI command; 2735 * i.e. for the first call of datamove(), it will be 0, 2736 * and for subsequent ones it will be the sum of lengths 2737 * of previous ones. 2738 * 2739 * The ext_data_filled is to account for unsolicited 2740 * (immediate) data that might have already arrived. 2741 */ 2742 bhsr2t->bhsr2t_buffer_offset = 2743 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2744 /* 2745 * This is the total length (sum of S/G lengths) this call 2746 * to cfiscsi_datamove() is supposed to handle. 2747 * 2748 * XXX: Limit it to MaxBurstLength. 2749 */ 2750 bhsr2t->bhsr2t_desired_data_transfer_length = 2751 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2752 cfiscsi_pdu_queue(response); 2753} 2754 2755static void 2756cfiscsi_datamove(union ctl_io *io) 2757{ 2758 2759 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2760 cfiscsi_datamove_in(io); 2761 else 2762 cfiscsi_datamove_out(io); 2763} 2764 2765static void 2766cfiscsi_scsi_command_done(union ctl_io *io) 2767{ 2768 struct icl_pdu *request, *response; 2769 struct iscsi_bhs_scsi_command *bhssc; 2770 struct iscsi_bhs_scsi_response *bhssr; 2771#ifdef DIAGNOSTIC 2772 struct cfiscsi_data_wait *cdw; 2773#endif 2774 struct cfiscsi_session *cs; 2775 uint16_t sense_length; 2776 2777 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2778 cs = PDU_SESSION(request); 2779 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2780 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2781 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2782 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2783 2784 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2785 // bhssc->bhssc_initiator_task_tag); 2786 2787#ifdef DIAGNOSTIC 2788 CFISCSI_SESSION_LOCK(cs); 2789 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2790 KASSERT(bhssc->bhssc_initiator_task_tag != 2791 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2792 CFISCSI_SESSION_UNLOCK(cs); 2793#endif 2794 2795 /* 2796 * Do not return status for aborted commands. 2797 * There are exceptions, but none supported by CTL yet. 2798 */ 2799 if (io->io_hdr.status == CTL_CMD_ABORTED) { 2800 ctl_free_io(io); 2801 icl_pdu_free(request); 2802 return; 2803 } 2804 2805 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2806 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2807 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2808 bhssr->bhssr_flags = 0x80; 2809 /* 2810 * XXX: We don't deal with bidirectional under/overflows; 2811 * does anything actually support those? 2812 */ 2813 if (PDU_TOTAL_TRANSFER_LEN(request) < 2814 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2815 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2816 bhssr->bhssr_residual_count = 2817 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2818 PDU_TOTAL_TRANSFER_LEN(request)); 2819 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2820 // ntohl(bhssr->bhssr_residual_count)); 2821 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2822 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2823 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2824 bhssr->bhssr_residual_count = 2825 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2826 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2827 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2828 // ntohl(bhssr->bhssr_residual_count)); 2829 } 2830 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2831 bhssr->bhssr_status = io->scsiio.scsi_status; 2832 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2833 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2834 2835 if (io->scsiio.sense_len > 0) { 2836#if 0 2837 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2838 io->scsiio.sense_len); 2839#endif 2840 sense_length = htons(io->scsiio.sense_len); 2841 icl_pdu_append_data(response, 2842 &sense_length, sizeof(sense_length), M_WAITOK); 2843 icl_pdu_append_data(response, 2844 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2845 } 2846 2847 ctl_free_io(io); 2848 icl_pdu_free(request); 2849 cfiscsi_pdu_queue(response); 2850} 2851 2852static void 2853cfiscsi_task_management_done(union ctl_io *io) 2854{ 2855 struct icl_pdu *request, *response; 2856 struct iscsi_bhs_task_management_request *bhstmr; 2857 struct iscsi_bhs_task_management_response *bhstmr2; 2858 struct cfiscsi_data_wait *cdw, *tmpcdw; 2859 struct cfiscsi_session *cs; 2860 2861 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2862 cs = PDU_SESSION(request); 2863 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2864 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2865 ISCSI_BHS_OPCODE_TASK_REQUEST, 2866 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2867 2868#if 0 2869 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2870 bhstmr->bhstmr_initiator_task_tag, 2871 bhstmr->bhstmr_referenced_task_tag); 2872#endif 2873 2874 if ((bhstmr->bhstmr_function & ~0x80) == 2875 BHSTMR_FUNCTION_ABORT_TASK) { 2876 /* 2877 * Make sure we no longer wait for Data-Out for this command. 2878 */ 2879 CFISCSI_SESSION_LOCK(cs); 2880 TAILQ_FOREACH_SAFE(cdw, 2881 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2882 if (bhstmr->bhstmr_referenced_task_tag != 2883 cdw->cdw_initiator_task_tag) 2884 continue; 2885 2886#if 0 2887 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2888 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2889#endif 2890 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2891 cdw, cdw_next); 2892 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2893 uma_zfree(cfiscsi_data_wait_zone, cdw); 2894 } 2895 CFISCSI_SESSION_UNLOCK(cs); 2896 } 2897 2898 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2899 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2900 response->ip_bhs; 2901 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2902 bhstmr2->bhstmr_flags = 0x80; 2903 if (io->io_hdr.status == CTL_SUCCESS) { 2904 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2905 } else { 2906 /* 2907 * XXX: How to figure out what exactly went wrong? iSCSI spec 2908 * expects us to provide detailed error, e.g. "Task does 2909 * not exist" or "LUN does not exist". 2910 */ 2911 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2912 bhstmr2->bhstmr_response = 2913 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2914 } 2915 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2916 2917 ctl_free_io(io); 2918 icl_pdu_free(request); 2919 cfiscsi_pdu_queue(response); 2920} 2921 2922static void 2923cfiscsi_done(union ctl_io *io) 2924{ 2925 struct icl_pdu *request; 2926 struct cfiscsi_session *cs; 2927 2928 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2929 ("invalid CTL status %#x", io->io_hdr.status)); 2930 2931 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2932 if (request == NULL) { 2933 /* 2934 * Implicit task termination has just completed; nothing to do. 2935 */ 2936 return; 2937 } 2938 2939 cs = PDU_SESSION(request); 2940 refcount_release(&cs->cs_outstanding_ctl_pdus); 2941 2942 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2943 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2944 cfiscsi_scsi_command_done(io); 2945 break; 2946 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2947 cfiscsi_task_management_done(io); 2948 break; 2949 default: 2950 panic("cfiscsi_done called with wrong opcode 0x%x", 2951 request->ip_bhs->bhs_opcode); 2952 } 2953} 2954