ctl_frontend_iscsi.c revision 267574
1/*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 267574 2014-06-17 09:02:10Z trasz $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 267574 2014-06-17 09:02:10Z trasz $"); 38 39#include <sys/param.h> 40#include <sys/capsicum.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include "../../dev/iscsi/icl.h" 71#include "../../dev/iscsi/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_targ_enable(void *arg, struct ctl_id targ_id); 153static int cfiscsi_targ_disable(void *arg, struct ctl_id targ_id); 154static int cfiscsi_lun_enable(void *arg, 155 struct ctl_id target_id, int lun_id); 156static int cfiscsi_lun_disable(void *arg, 157 struct ctl_id target_id, int lun_id); 158static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160static int cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len); 161static void cfiscsi_datamove(union ctl_io *io); 162static void cfiscsi_done(union ctl_io *io); 163static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun); 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 void cfiscsi_target_release(struct cfiscsi_target *ct); 174static void cfiscsi_session_delete(struct cfiscsi_session *cs); 175 176static struct cfiscsi_softc cfiscsi_softc; 177extern struct ctl_softc *control_softc; 178 179static int cfiscsi_module_event_handler(module_t, int /*modeventtype_t*/, void *); 180 181static moduledata_t cfiscsi_moduledata = { 182 "ctlcfiscsi", 183 cfiscsi_module_event_handler, 184 NULL 185}; 186 187DECLARE_MODULE(ctlcfiscsi, cfiscsi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH); 188MODULE_VERSION(ctlcfiscsi, 1); 189MODULE_DEPEND(ctlcfiscsi, ctl, 1, 1, 1); 190MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 191 192static struct icl_pdu * 193cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 194{ 195 196 return (icl_pdu_new_bhs(request->ip_conn, flags)); 197} 198 199static bool 200cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 201{ 202 const struct iscsi_bhs_scsi_command *bhssc; 203 struct cfiscsi_session *cs; 204 uint32_t cmdsn, expstatsn; 205 206 cs = PDU_SESSION(request); 207 208 /* 209 * Every incoming PDU - not just NOP-Out - resets the ping timer. 210 * The purpose of the timeout is to reset the connection when it stalls; 211 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 212 * in some queue. 213 * 214 * XXX: Locking? 215 */ 216 cs->cs_timeout = 0; 217 218 /* 219 * Data-Out PDUs don't contain CmdSN. 220 */ 221 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 222 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 223 return (false); 224 225 /* 226 * We're only using fields common for all the request 227 * (initiator -> target) PDUs. 228 */ 229 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 230 cmdsn = ntohl(bhssc->bhssc_cmdsn); 231 expstatsn = ntohl(bhssc->bhssc_expstatsn); 232 233 CFISCSI_SESSION_LOCK(cs); 234#if 0 235 if (expstatsn != cs->cs_statsn) { 236 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 237 "while current StatSN is %d", expstatsn, 238 cs->cs_statsn); 239 } 240#endif 241 242 /* 243 * The target MUST silently ignore any non-immediate command outside 244 * of this range. 245 */ 246 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 247 CFISCSI_SESSION_UNLOCK(cs); 248 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 249 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 250 return (true); 251 } 252 253 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 254 cs->cs_cmdsn++; 255 256 CFISCSI_SESSION_UNLOCK(cs); 257 258 return (false); 259} 260 261static void 262cfiscsi_pdu_handle(struct icl_pdu *request) 263{ 264 struct cfiscsi_session *cs; 265 bool ignore; 266 267 cs = PDU_SESSION(request); 268 269 ignore = cfiscsi_pdu_update_cmdsn(request); 270 if (ignore) { 271 icl_pdu_free(request); 272 return; 273 } 274 275 /* 276 * Handle the PDU; this includes e.g. receiving the remaining 277 * part of PDU and submitting the SCSI command to CTL 278 * or queueing a reply. The handling routine is responsible 279 * for freeing the PDU when it's no longer needed. 280 */ 281 switch (request->ip_bhs->bhs_opcode & 282 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 283 case ISCSI_BHS_OPCODE_NOP_OUT: 284 cfiscsi_pdu_handle_nop_out(request); 285 break; 286 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 287 cfiscsi_pdu_handle_scsi_command(request); 288 break; 289 case ISCSI_BHS_OPCODE_TASK_REQUEST: 290 cfiscsi_pdu_handle_task_request(request); 291 break; 292 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 293 cfiscsi_pdu_handle_data_out(request); 294 break; 295 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 296 cfiscsi_pdu_handle_logout_request(request); 297 break; 298 default: 299 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 300 "opcode 0x%x; dropping connection", 301 request->ip_bhs->bhs_opcode); 302 icl_pdu_free(request); 303 cfiscsi_session_terminate(cs); 304 } 305 306} 307 308static void 309cfiscsi_receive_callback(struct icl_pdu *request) 310{ 311 struct cfiscsi_session *cs; 312 313 cs = PDU_SESSION(request); 314 315#ifdef ICL_KERNEL_PROXY 316 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 317 if (cs->cs_login_pdu == NULL) 318 cs->cs_login_pdu = request; 319 else 320 icl_pdu_free(request); 321 cv_signal(&cs->cs_login_cv); 322 return; 323 } 324#endif 325 326 cfiscsi_pdu_handle(request); 327} 328 329static void 330cfiscsi_error_callback(struct icl_conn *ic) 331{ 332 struct cfiscsi_session *cs; 333 334 cs = CONN_SESSION(ic); 335 336 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 337 cfiscsi_session_terminate(cs); 338} 339 340static int 341cfiscsi_pdu_prepare(struct icl_pdu *response) 342{ 343 struct cfiscsi_session *cs; 344 struct iscsi_bhs_scsi_response *bhssr; 345 bool advance_statsn = true; 346 347 cs = PDU_SESSION(response); 348 349 CFISCSI_SESSION_LOCK_ASSERT(cs); 350 351 /* 352 * We're only using fields common for all the response 353 * (target -> initiator) PDUs. 354 */ 355 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 356 357 /* 358 * 10.8.3: "The StatSN for this connection is not advanced 359 * after this PDU is sent." 360 */ 361 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 362 advance_statsn = false; 363 364 /* 365 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 366 * StatSN for the connection is not advanced after this PDU is sent." 367 */ 368 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 369 bhssr->bhssr_initiator_task_tag == 0xffffffff) 370 advance_statsn = false; 371 372 /* 373 * See the comment below - StatSN is not meaningful and must 374 * not be advanced. 375 */ 376 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 377 advance_statsn = false; 378 379 /* 380 * 10.7.3: "The fields StatSN, Status, and Residual Count 381 * only have meaningful content if the S bit is set to 1." 382 */ 383 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 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_softc->fe.ctl_pool_ref); 551 if (io == NULL) { 552 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 553 "dropping connection"); 554 icl_pdu_free(request); 555 cfiscsi_session_terminate(cs); 556 return; 557 } 558 ctl_zero_io(io); 559 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 560 io->io_hdr.io_type = CTL_IO_SCSI; 561 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 562 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 563 io->io_hdr.nexus.targ_target.id = 0; 564 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 565 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 566 io->io_hdr.nexus.lun_map_arg = cs; 567 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 568 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 569 case BHSSC_FLAGS_ATTR_UNTAGGED: 570 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 571 break; 572 case BHSSC_FLAGS_ATTR_SIMPLE: 573 io->scsiio.tag_type = CTL_TAG_SIMPLE; 574 break; 575 case BHSSC_FLAGS_ATTR_ORDERED: 576 io->scsiio.tag_type = CTL_TAG_ORDERED; 577 break; 578 case BHSSC_FLAGS_ATTR_HOQ: 579 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 580 break; 581 case BHSSC_FLAGS_ATTR_ACA: 582 io->scsiio.tag_type = CTL_TAG_ACA; 583 break; 584 default: 585 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 586 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 587 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 588 break; 589 } 590 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 591 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 592 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 593 error = ctl_queue(io); 594 if (error != CTL_RETVAL_COMPLETE) { 595 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 596 "dropping connection", error); 597 ctl_free_io(io); 598 refcount_release(&cs->cs_outstanding_ctl_pdus); 599 icl_pdu_free(request); 600 cfiscsi_session_terminate(cs); 601 } 602} 603 604static void 605cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 606{ 607 struct iscsi_bhs_task_management_request *bhstmr; 608 struct iscsi_bhs_task_management_response *bhstmr2; 609 struct icl_pdu *response; 610 struct cfiscsi_session *cs; 611 union ctl_io *io; 612 int error; 613 614 cs = PDU_SESSION(request); 615 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 616 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 617 if (io == NULL) { 618 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 619 "dropping connection"); 620 icl_pdu_free(request); 621 cfiscsi_session_terminate(cs); 622 return; 623 } 624 ctl_zero_io(io); 625 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 626 io->io_hdr.io_type = CTL_IO_TASK; 627 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 628 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 629 io->io_hdr.nexus.targ_target.id = 0; 630 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 631 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 632 io->io_hdr.nexus.lun_map_arg = cs; 633 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 634 635 switch (bhstmr->bhstmr_function & ~0x80) { 636 case BHSTMR_FUNCTION_ABORT_TASK: 637#if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 639#endif 640 io->taskio.task_action = CTL_TASK_ABORT_TASK; 641 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 642 break; 643 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 644#if 0 645 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 646#endif 647 io->taskio.task_action = CTL_TASK_LUN_RESET; 648 break; 649 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 650#if 0 651 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 652#endif 653 io->taskio.task_action = CTL_TASK_TARGET_RESET; 654 break; 655 default: 656 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 657 bhstmr->bhstmr_function & ~0x80); 658 ctl_free_io(io); 659 660 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 661 if (response == NULL) { 662 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 663 "dropping connection"); 664 icl_pdu_free(request); 665 cfiscsi_session_terminate(cs); 666 return; 667 } 668 bhstmr2 = (struct iscsi_bhs_task_management_response *) 669 response->ip_bhs; 670 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 671 bhstmr2->bhstmr_flags = 0x80; 672 bhstmr2->bhstmr_response = 673 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 674 bhstmr2->bhstmr_initiator_task_tag = 675 bhstmr->bhstmr_initiator_task_tag; 676 icl_pdu_free(request); 677 cfiscsi_pdu_queue(response); 678 return; 679 } 680 681 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 682 error = ctl_queue(io); 683 if (error != CTL_RETVAL_COMPLETE) { 684 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 685 "dropping connection", error); 686 ctl_free_io(io); 687 refcount_release(&cs->cs_outstanding_ctl_pdus); 688 icl_pdu_free(request); 689 cfiscsi_session_terminate(cs); 690 } 691} 692 693static bool 694cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 695{ 696 struct iscsi_bhs_data_out *bhsdo; 697 struct cfiscsi_session *cs; 698 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 699 size_t copy_len, len, off, buffer_offset; 700 int ctl_sg_count; 701 union ctl_io *io; 702 703 cs = PDU_SESSION(request); 704 705 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 706 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 707 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 708 ISCSI_BHS_OPCODE_SCSI_COMMAND, 709 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 710 711 /* 712 * We're only using fields common for Data-Out and SCSI Command PDUs. 713 */ 714 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 715 716 io = cdw->cdw_ctl_io; 717 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 718 ("CTL_FLAG_DATA_IN")); 719 720#if 0 721 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 722 request->ip_data_len, io->scsiio.kern_total_len); 723#endif 724 725 if (io->scsiio.kern_sg_entries > 0) { 726 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 727 ctl_sg_count = io->scsiio.kern_sg_entries; 728 } else { 729 ctl_sglist = &ctl_sg_entry; 730 ctl_sglist->addr = io->scsiio.kern_data_ptr; 731 ctl_sglist->len = io->scsiio.kern_data_len; 732 ctl_sg_count = 1; 733 } 734 735 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 736 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 737 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 738 else 739 buffer_offset = 0; 740 741 /* 742 * Make sure the offset, as sent by the initiator, matches the offset 743 * we're supposed to be at in the scatter-gather list. 744 */ 745 if (buffer_offset != 746 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 747 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 748 "expected %zd; dropping connection", buffer_offset, 749 (size_t)io->scsiio.kern_rel_offset + 750 (size_t)io->scsiio.ext_data_filled); 751 ctl_set_data_phase_error(&io->scsiio); 752 cfiscsi_session_terminate(cs); 753 return (true); 754 } 755 756 /* 757 * This is the offset within the PDU data segment, as opposed 758 * to buffer_offset, which is the offset within the task (SCSI 759 * command). 760 */ 761 off = 0; 762 len = icl_pdu_data_segment_length(request); 763 764 /* 765 * Iterate over the scatter/gather segments, filling them with data 766 * from the PDU data segment. Note that this can get called multiple 767 * times for one SCSI command; the cdw structure holds state for the 768 * scatter/gather list. 769 */ 770 for (;;) { 771 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 772 ("cdw->cdw_sg_index >= ctl_sg_count")); 773 if (cdw->cdw_sg_len == 0) { 774 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 775 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 776 } 777 KASSERT(off <= len, ("len > off")); 778 copy_len = len - off; 779 if (copy_len > cdw->cdw_sg_len) 780 copy_len = cdw->cdw_sg_len; 781 782 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 783 cdw->cdw_sg_addr += copy_len; 784 cdw->cdw_sg_len -= copy_len; 785 off += copy_len; 786 io->scsiio.ext_data_filled += copy_len; 787 788 if (cdw->cdw_sg_len == 0) { 789 /* 790 * End of current segment. 791 */ 792 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 793 /* 794 * Last segment in scatter/gather list. 795 */ 796 break; 797 } 798 cdw->cdw_sg_index++; 799 } 800 801 if (off == len) { 802 /* 803 * End of PDU payload. 804 */ 805 break; 806 } 807 } 808 809 if (len > off) { 810 /* 811 * In case of unsolicited data, it's possible that the buffer 812 * provided by CTL is smaller than negotiated FirstBurstLength. 813 * Just ignore the superfluous data; will ask for them with R2T 814 * on next call to cfiscsi_datamove(). 815 * 816 * This obviously can only happen with SCSI Command PDU. 817 */ 818 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 819 ISCSI_BHS_OPCODE_SCSI_COMMAND) { 820 CFISCSI_SESSION_DEBUG(cs, "received too much immediate " 821 "data: got %zd bytes, expected %zd", 822 icl_pdu_data_segment_length(request), off); 823 return (true); 824 } 825 826 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 827 "expected %zd; dropping connection", 828 icl_pdu_data_segment_length(request), off); 829 ctl_set_data_phase_error(&io->scsiio); 830 cfiscsi_session_terminate(cs); 831 return (true); 832 } 833 834 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len && 835 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 836 CFISCSI_SESSION_WARN(cs, "got the final packet without " 837 "the F flag; flags = 0x%x; dropping connection", 838 bhsdo->bhsdo_flags); 839 ctl_set_data_phase_error(&io->scsiio); 840 cfiscsi_session_terminate(cs); 841 return (true); 842 } 843 844 if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len && 845 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 846 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 847 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 848 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 849 "transmitted size was %zd bytes instead of %d; " 850 "dropping connection", 851 (size_t)io->scsiio.ext_data_filled, 852 io->scsiio.kern_data_len); 853 ctl_set_data_phase_error(&io->scsiio); 854 cfiscsi_session_terminate(cs); 855 return (true); 856 } else { 857 /* 858 * For SCSI Command PDU, this just means we need to 859 * solicit more data by sending R2T. 860 */ 861 return (false); 862 } 863 } 864 865 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) { 866#if 0 867 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 868 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 869#endif 870 871 return (true); 872 } 873 874 return (false); 875} 876 877static void 878cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 879{ 880 struct iscsi_bhs_data_out *bhsdo; 881 struct cfiscsi_session *cs; 882 struct cfiscsi_data_wait *cdw = NULL; 883 union ctl_io *io; 884 bool done; 885 886 cs = PDU_SESSION(request); 887 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 888 889 CFISCSI_SESSION_LOCK(cs); 890 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 891#if 0 892 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 893 "ttt 0x%x, itt 0x%x", 894 bhsdo->bhsdo_target_transfer_tag, 895 bhsdo->bhsdo_initiator_task_tag, 896 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 897#endif 898 if (bhsdo->bhsdo_target_transfer_tag == 899 cdw->cdw_target_transfer_tag) 900 break; 901 } 902 CFISCSI_SESSION_UNLOCK(cs); 903 if (cdw == NULL) { 904 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 905 "0x%x, not found; dropping connection", 906 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 907 icl_pdu_free(request); 908 cfiscsi_session_terminate(cs); 909 return; 910 } 911 912 io = cdw->cdw_ctl_io; 913 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 914 ("CTL_FLAG_DATA_IN")); 915 916 done = cfiscsi_handle_data_segment(request, cdw); 917 if (done) { 918 CFISCSI_SESSION_LOCK(cs); 919 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 920 CFISCSI_SESSION_UNLOCK(cs); 921 uma_zfree(cfiscsi_data_wait_zone, cdw); 922 io->scsiio.be_move_done(io); 923 } 924 925 icl_pdu_free(request); 926} 927 928static void 929cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 930{ 931 struct iscsi_bhs_logout_request *bhslr; 932 struct iscsi_bhs_logout_response *bhslr2; 933 struct icl_pdu *response; 934 struct cfiscsi_session *cs; 935 936 cs = PDU_SESSION(request); 937 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 938 switch (bhslr->bhslr_reason & 0x7f) { 939 case BHSLR_REASON_CLOSE_SESSION: 940 case BHSLR_REASON_CLOSE_CONNECTION: 941 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 942 if (response == NULL) { 943 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 944 icl_pdu_free(request); 945 cfiscsi_session_terminate(cs); 946 return; 947 } 948 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 949 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 950 bhslr2->bhslr_flags = 0x80; 951 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 952 bhslr2->bhslr_initiator_task_tag = 953 bhslr->bhslr_initiator_task_tag; 954 icl_pdu_free(request); 955 cfiscsi_pdu_queue(response); 956 cfiscsi_session_terminate(cs); 957 break; 958 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 959 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 960 if (response == NULL) { 961 CFISCSI_SESSION_WARN(cs, 962 "failed to allocate memory; dropping connection"); 963 icl_pdu_free(request); 964 cfiscsi_session_terminate(cs); 965 return; 966 } 967 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 968 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 969 bhslr2->bhslr_flags = 0x80; 970 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 971 bhslr2->bhslr_initiator_task_tag = 972 bhslr->bhslr_initiator_task_tag; 973 icl_pdu_free(request); 974 cfiscsi_pdu_queue(response); 975 break; 976 default: 977 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 978 bhslr->bhslr_reason); 979 icl_pdu_free(request); 980 cfiscsi_session_terminate(cs); 981 break; 982 } 983} 984 985static void 986cfiscsi_callout(void *context) 987{ 988 struct icl_pdu *cp; 989 struct iscsi_bhs_nop_in *bhsni; 990 struct cfiscsi_session *cs; 991 992 cs = context; 993 994 if (cs->cs_terminating) 995 return; 996 997 callout_schedule(&cs->cs_callout, 1 * hz); 998 999 atomic_add_int(&cs->cs_timeout, 1); 1000 1001#ifdef ICL_KERNEL_PROXY 1002 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1003 if (cs->cs_timeout > login_timeout) { 1004 CFISCSI_SESSION_WARN(cs, "login timed out after " 1005 "%d seconds; dropping connection", cs->cs_timeout); 1006 cfiscsi_session_terminate(cs); 1007 } 1008 return; 1009 } 1010#endif 1011 1012 if (cs->cs_timeout >= ping_timeout) { 1013 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1014 "dropping connection", ping_timeout); 1015 cfiscsi_session_terminate(cs); 1016 return; 1017 } 1018 1019 /* 1020 * If the ping was reset less than one second ago - which means 1021 * that we've received some PDU during the last second - assume 1022 * the traffic flows correctly and don't bother sending a NOP-Out. 1023 * 1024 * (It's 2 - one for one second, and one for incrementing is_timeout 1025 * earlier in this routine.) 1026 */ 1027 if (cs->cs_timeout < 2) 1028 return; 1029 1030 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1031 if (cp == NULL) { 1032 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1033 return; 1034 } 1035 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1036 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1037 bhsni->bhsni_flags = 0x80; 1038 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1039 1040 cfiscsi_pdu_queue(cp); 1041} 1042 1043static void 1044cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1045{ 1046 struct cfiscsi_data_wait *cdw, *tmpcdw; 1047 union ctl_io *io; 1048 int error; 1049 1050#ifdef notyet 1051 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1052 if (io == NULL) { 1053 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1054 return; 1055 } 1056 ctl_zero_io(io); 1057 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1058 io->io_hdr.io_type = CTL_IO_TASK; 1059 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1060 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1061 io->io_hdr.nexus.targ_target.id = 0; 1062 io->io_hdr.nexus.targ_lun = lun; 1063 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1064 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1065 error = ctl_queue(io); 1066 if (error != CTL_RETVAL_COMPLETE) { 1067 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1068 ctl_free_io(io); 1069 } 1070#else 1071 /* 1072 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1073 * just iterate over tasks that are waiting for something - data - and 1074 * terminate those. 1075 */ 1076 CFISCSI_SESSION_LOCK(cs); 1077 TAILQ_FOREACH_SAFE(cdw, 1078 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1079 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1080 if (io == NULL) { 1081 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1082 return; 1083 } 1084 ctl_zero_io(io); 1085 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1086 io->io_hdr.io_type = CTL_IO_TASK; 1087 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1088 io->io_hdr.nexus.targ_port = 1089 cs->cs_target->ct_softc->fe.targ_port; 1090 io->io_hdr.nexus.targ_target.id = 0; 1091 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1092 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1093 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1094 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1095 error = ctl_queue(io); 1096 if (error != CTL_RETVAL_COMPLETE) { 1097 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1098 ctl_free_io(io); 1099 return; 1100 } 1101#if 0 1102 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1103 "0x%x", cdw->cdw_initiator_task_tag); 1104#endif 1105 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1106 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1107 uma_zfree(cfiscsi_data_wait_zone, cdw); 1108 } 1109 CFISCSI_SESSION_UNLOCK(cs); 1110#endif 1111} 1112 1113static void 1114cfiscsi_maintenance_thread(void *arg) 1115{ 1116 struct cfiscsi_session *cs; 1117 1118 cs = arg; 1119 1120 for (;;) { 1121 CFISCSI_SESSION_LOCK(cs); 1122 if (cs->cs_terminating == false) 1123 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1124 CFISCSI_SESSION_UNLOCK(cs); 1125 1126 if (cs->cs_terminating) { 1127 cfiscsi_session_terminate_tasks(cs); 1128 callout_drain(&cs->cs_callout); 1129 1130 icl_conn_shutdown(cs->cs_conn); 1131 icl_conn_close(cs->cs_conn); 1132 1133 /* 1134 * XXX: We used to wait up to 30 seconds to deliver queued PDUs 1135 * to the initiator. We also tried hard to deliver SCSI Responses 1136 * for the aborted PDUs. We don't do that anymore. We might need 1137 * to revisit that. 1138 */ 1139 1140 cfiscsi_session_delete(cs); 1141 kthread_exit(); 1142 return; 1143 } 1144 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1145 } 1146} 1147 1148static void 1149cfiscsi_session_terminate(struct cfiscsi_session *cs) 1150{ 1151 1152 if (cs->cs_terminating) 1153 return; 1154 cs->cs_terminating = true; 1155 cv_signal(&cs->cs_maintenance_cv); 1156#ifdef ICL_KERNEL_PROXY 1157 cv_signal(&cs->cs_login_cv); 1158#endif 1159} 1160 1161static int 1162cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1163{ 1164 int error, i; 1165 struct cfiscsi_softc *softc; 1166 1167 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1168 1169 softc = &cfiscsi_softc; 1170 1171 mtx_lock(&softc->lock); 1172 for (i = 0; i < softc->max_initiators; i++) { 1173 if (softc->ctl_initids[i] == 0) 1174 break; 1175 } 1176 if (i == softc->max_initiators) { 1177 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1178 softc->max_initiators); 1179 mtx_unlock(&softc->lock); 1180 return (1); 1181 } 1182 softc->ctl_initids[i] = 1; 1183 mtx_unlock(&softc->lock); 1184 1185#if 0 1186 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1187 i, softc->max_initiators); 1188#endif 1189 cs->cs_ctl_initid = i; 1190 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1191 if (error != 0) { 1192 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1193 mtx_lock(&softc->lock); 1194 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1195 mtx_unlock(&softc->lock); 1196 cs->cs_ctl_initid = -1; 1197 return (1); 1198 } 1199 1200 return (0); 1201} 1202 1203static void 1204cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1205{ 1206 int error; 1207 struct cfiscsi_softc *softc; 1208 1209 if (cs->cs_ctl_initid == -1) 1210 return; 1211 1212 softc = &cfiscsi_softc; 1213 1214 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1215 if (error != 0) { 1216 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1217 error); 1218 } 1219 mtx_lock(&softc->lock); 1220 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1221 mtx_unlock(&softc->lock); 1222 cs->cs_ctl_initid = -1; 1223} 1224 1225static struct cfiscsi_session * 1226cfiscsi_session_new(struct cfiscsi_softc *softc) 1227{ 1228 struct cfiscsi_session *cs; 1229 int error; 1230 1231 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1232 if (cs == NULL) { 1233 CFISCSI_WARN("malloc failed"); 1234 return (NULL); 1235 } 1236 cs->cs_ctl_initid = -1; 1237 1238 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1239 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1240 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1241 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1242#ifdef ICL_KERNEL_PROXY 1243 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1244#endif 1245 1246 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1247 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1248 cs->cs_conn->ic_error = cfiscsi_error_callback; 1249 cs->cs_conn->ic_prv0 = cs; 1250 1251 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1252 if (error != 0) { 1253 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1254 free(cs, M_CFISCSI); 1255 return (NULL); 1256 } 1257 1258 mtx_lock(&softc->lock); 1259 cs->cs_id = softc->last_session_id + 1; 1260 softc->last_session_id++; 1261 mtx_unlock(&softc->lock); 1262 1263 mtx_lock(&softc->lock); 1264 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1265 mtx_unlock(&softc->lock); 1266 1267 /* 1268 * Start pinging the initiator. 1269 */ 1270 callout_init(&cs->cs_callout, 1); 1271 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1272 1273 return (cs); 1274} 1275 1276static void 1277cfiscsi_session_delete(struct cfiscsi_session *cs) 1278{ 1279 struct cfiscsi_softc *softc; 1280 1281 softc = &cfiscsi_softc; 1282 1283 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1284 ("destroying session with outstanding CTL pdus")); 1285 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1286 ("destroying session with non-empty queue")); 1287 1288 cfiscsi_session_unregister_initiator(cs); 1289 if (cs->cs_target != NULL) 1290 cfiscsi_target_release(cs->cs_target); 1291 icl_conn_close(cs->cs_conn); 1292 icl_conn_free(cs->cs_conn); 1293 1294 mtx_lock(&softc->lock); 1295 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1296 mtx_unlock(&softc->lock); 1297 1298 free(cs, M_CFISCSI); 1299} 1300 1301int 1302cfiscsi_init(void) 1303{ 1304 struct cfiscsi_softc *softc; 1305 struct ctl_frontend *fe; 1306 int retval; 1307 1308 softc = &cfiscsi_softc; 1309 retval = 0; 1310 bzero(softc, sizeof(*softc)); 1311 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1312 1313#ifdef ICL_KERNEL_PROXY 1314 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1315#endif 1316 TAILQ_INIT(&softc->sessions); 1317 TAILQ_INIT(&softc->targets); 1318 1319 fe = &softc->fe; 1320 fe->port_type = CTL_PORT_ISCSI; 1321 /* XXX KDM what should the real number be here? */ 1322 fe->num_requested_ctl_io = 4096; 1323 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1324 fe->port_name = softc->port_name; 1325 fe->port_online = cfiscsi_online; 1326 fe->port_offline = cfiscsi_offline; 1327 fe->onoff_arg = softc; 1328 fe->targ_enable = cfiscsi_targ_enable; 1329 fe->targ_disable = cfiscsi_targ_disable; 1330 fe->lun_enable = cfiscsi_lun_enable; 1331 fe->lun_disable = cfiscsi_lun_disable; 1332 fe->targ_lun_arg = softc; 1333 fe->ioctl = cfiscsi_ioctl; 1334 fe->devid = cfiscsi_devid; 1335 fe->fe_datamove = cfiscsi_datamove; 1336 fe->fe_done = cfiscsi_done; 1337 1338 /* XXX KDM what should we report here? */ 1339 /* XXX These should probably be fetched from CTL. */ 1340 fe->max_targets = 1; 1341 fe->max_target_id = 15; 1342 1343 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1344 if (retval != 0) { 1345 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1346 retval); 1347 retval = 1; 1348 goto bailout; 1349 } 1350 1351 softc->max_initiators = fe->max_initiators; 1352 1353 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1354 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1355 UMA_ALIGN_PTR, 0); 1356 1357 return (0); 1358 1359bailout: 1360 return (retval); 1361} 1362 1363static int 1364cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1365{ 1366 1367 switch (what) { 1368 case MOD_LOAD: 1369 return (cfiscsi_init()); 1370 case MOD_UNLOAD: 1371 return (EBUSY); 1372 default: 1373 return (EOPNOTSUPP); 1374 } 1375} 1376 1377#ifdef ICL_KERNEL_PROXY 1378static void 1379cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1380{ 1381 struct cfiscsi_session *cs; 1382 1383 cs = cfiscsi_session_new(&cfiscsi_softc); 1384 if (cs == NULL) { 1385 CFISCSI_WARN("failed to create session"); 1386 return; 1387 } 1388 1389 icl_conn_handoff_sock(cs->cs_conn, so); 1390 cs->cs_initiator_sa = sa; 1391 cs->cs_portal_id = portal_id; 1392 cs->cs_waiting_for_ctld = true; 1393 cv_signal(&cfiscsi_softc.accept_cv); 1394} 1395#endif 1396 1397static void 1398cfiscsi_online(void *arg) 1399{ 1400 struct cfiscsi_softc *softc; 1401 1402 softc = (struct cfiscsi_softc *)arg; 1403 1404 softc->online = 1; 1405#ifdef ICL_KERNEL_PROXY 1406 if (softc->listener != NULL) 1407 icl_listen_free(softc->listener); 1408 softc->listener = icl_listen_new(cfiscsi_accept); 1409#endif 1410} 1411 1412static void 1413cfiscsi_offline(void *arg) 1414{ 1415 struct cfiscsi_softc *softc; 1416 struct cfiscsi_session *cs; 1417 1418 softc = (struct cfiscsi_softc *)arg; 1419 1420 softc->online = 0; 1421 1422 mtx_lock(&softc->lock); 1423 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1424 cfiscsi_session_terminate(cs); 1425 mtx_unlock(&softc->lock); 1426 1427#ifdef ICL_KERNEL_PROXY 1428 icl_listen_free(softc->listener); 1429 softc->listener = NULL; 1430#endif 1431} 1432 1433static int 1434cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1435{ 1436 1437 return (0); 1438} 1439 1440static int 1441cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1442{ 1443 1444 return (0); 1445} 1446 1447static void 1448cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1449{ 1450 struct cfiscsi_softc *softc; 1451 struct cfiscsi_session *cs; 1452 struct cfiscsi_target *ct; 1453 struct ctl_iscsi_handoff_params *cihp; 1454 int error; 1455 1456 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1457 softc = &cfiscsi_softc; 1458 1459 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1460 cihp->initiator_name, cihp->initiator_addr, 1461 cihp->target_name); 1462 1463 if (softc->online == 0) { 1464 ci->status = CTL_ISCSI_ERROR; 1465 snprintf(ci->error_str, sizeof(ci->error_str), 1466 "%s: port offline", __func__); 1467 return; 1468 } 1469 1470 ct = cfiscsi_target_find(softc, cihp->target_name); 1471 if (ct == NULL) { 1472 ci->status = CTL_ISCSI_ERROR; 1473 snprintf(ci->error_str, sizeof(ci->error_str), 1474 "%s: target not found", __func__); 1475 return; 1476 } 1477 1478#ifdef ICL_KERNEL_PROXY 1479 if (cihp->socket > 0 && cihp->connection_id > 0) { 1480 snprintf(ci->error_str, sizeof(ci->error_str), 1481 "both socket and connection_id set"); 1482 ci->status = CTL_ISCSI_ERROR; 1483 cfiscsi_target_release(ct); 1484 return; 1485 } 1486 if (cihp->socket == 0) { 1487 mtx_lock(&cfiscsi_softc.lock); 1488 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1489 if (cs->cs_id == cihp->socket) 1490 break; 1491 } 1492 if (cs == NULL) { 1493 mtx_unlock(&cfiscsi_softc.lock); 1494 snprintf(ci->error_str, sizeof(ci->error_str), 1495 "connection not found"); 1496 ci->status = CTL_ISCSI_ERROR; 1497 cfiscsi_target_release(ct); 1498 return; 1499 } 1500 mtx_unlock(&cfiscsi_softc.lock); 1501 } else { 1502#endif 1503 cs = cfiscsi_session_new(softc); 1504 if (cs == NULL) { 1505 ci->status = CTL_ISCSI_ERROR; 1506 snprintf(ci->error_str, sizeof(ci->error_str), 1507 "%s: cfiscsi_session_new failed", __func__); 1508 cfiscsi_target_release(ct); 1509 return; 1510 } 1511#ifdef ICL_KERNEL_PROXY 1512 } 1513#endif 1514 cs->cs_target = ct; 1515 1516 /* 1517 * First PDU of Full Feature phase has the same CmdSN as the last 1518 * PDU from the Login Phase received from the initiator. Thus, 1519 * the -1 below. 1520 */ 1521 cs->cs_portal_group_tag = cihp->portal_group_tag; 1522 cs->cs_cmdsn = cihp->cmdsn; 1523 cs->cs_statsn = cihp->statsn; 1524 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1525 cs->cs_max_burst_length = cihp->max_burst_length; 1526 cs->cs_immediate_data = !!cihp->immediate_data; 1527 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1528 cs->cs_conn->ic_header_crc32c = true; 1529 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1530 cs->cs_conn->ic_data_crc32c = true; 1531 1532 strlcpy(cs->cs_initiator_name, 1533 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1534 strlcpy(cs->cs_initiator_addr, 1535 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1536 strlcpy(cs->cs_initiator_alias, 1537 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1538 1539#ifdef ICL_KERNEL_PROXY 1540 if (cihp->socket > 0) { 1541#endif 1542 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1543 if (error != 0) { 1544 cfiscsi_session_delete(cs); 1545 ci->status = CTL_ISCSI_ERROR; 1546 snprintf(ci->error_str, sizeof(ci->error_str), 1547 "%s: icl_conn_handoff failed with error %d", 1548 __func__, error); 1549 return; 1550 } 1551#ifdef ICL_KERNEL_PROXY 1552 } 1553#endif 1554 1555 /* 1556 * Register initiator with CTL. 1557 */ 1558 cfiscsi_session_register_initiator(cs); 1559 1560#ifdef ICL_KERNEL_PROXY 1561 cs->cs_login_phase = false; 1562 1563 /* 1564 * First PDU of the Full Feature phase has likely already arrived. 1565 * We have to pick it up and execute properly. 1566 */ 1567 if (cs->cs_login_pdu != NULL) { 1568 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1569 cfiscsi_pdu_handle(cs->cs_login_pdu); 1570 cs->cs_login_pdu = NULL; 1571 } 1572#endif 1573 1574 ci->status = CTL_ISCSI_OK; 1575} 1576 1577static void 1578cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1579{ 1580 struct ctl_iscsi_list_params *cilp; 1581 struct cfiscsi_session *cs; 1582 struct cfiscsi_softc *softc; 1583 struct sbuf *sb; 1584 int error; 1585 1586 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1587 softc = &cfiscsi_softc; 1588 1589 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1590 if (sb == NULL) { 1591 ci->status = CTL_ISCSI_ERROR; 1592 snprintf(ci->error_str, sizeof(ci->error_str), 1593 "Unable to allocate %d bytes for iSCSI session list", 1594 cilp->alloc_len); 1595 return; 1596 } 1597 1598 sbuf_printf(sb, "<ctlislist>\n"); 1599 mtx_lock(&softc->lock); 1600 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1601#ifdef ICL_KERNEL_PROXY 1602 if (cs->cs_target == NULL) 1603 continue; 1604#endif 1605 error = sbuf_printf(sb, "<connection id=\"%d\">" 1606 "<initiator>%s</initiator>" 1607 "<initiator_addr>%s</initiator_addr>" 1608 "<initiator_alias>%s</initiator_alias>" 1609 "<target>%s</target>" 1610 "<target_alias>%s</target_alias>" 1611 "<header_digest>%s</header_digest>" 1612 "<data_digest>%s</data_digest>" 1613 "<max_data_segment_length>%zd</max_data_segment_length>" 1614 "<immediate_data>%d</immediate_data>" 1615 "<iser>%d</iser>" 1616 "</connection>\n", 1617 cs->cs_id, 1618 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1619 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1620 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1621 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1622 cs->cs_max_data_segment_length, 1623 cs->cs_immediate_data, 1624 cs->cs_conn->ic_iser); 1625 if (error != 0) 1626 break; 1627 } 1628 mtx_unlock(&softc->lock); 1629 error = sbuf_printf(sb, "</ctlislist>\n"); 1630 if (error != 0) { 1631 sbuf_delete(sb); 1632 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1633 snprintf(ci->error_str, sizeof(ci->error_str), 1634 "Out of space, %d bytes is too small", cilp->alloc_len); 1635 return; 1636 } 1637 sbuf_finish(sb); 1638 1639 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1640 cilp->fill_len = sbuf_len(sb) + 1; 1641 ci->status = CTL_ISCSI_OK; 1642 sbuf_delete(sb); 1643} 1644 1645static void 1646cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1647{ 1648 struct icl_pdu *response; 1649 struct iscsi_bhs_asynchronous_message *bhsam; 1650 struct ctl_iscsi_terminate_params *citp; 1651 struct cfiscsi_session *cs; 1652 struct cfiscsi_softc *softc; 1653 int found = 0; 1654 1655 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1656 softc = &cfiscsi_softc; 1657 1658 mtx_lock(&softc->lock); 1659 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1660 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1661 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1662 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1663 continue; 1664 1665 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1666 if (response == NULL) { 1667 /* 1668 * Oh well. Just terminate the connection. 1669 */ 1670 } else { 1671 bhsam = (struct iscsi_bhs_asynchronous_message *) 1672 response->ip_bhs; 1673 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1674 bhsam->bhsam_flags = 0x80; 1675 bhsam->bhsam_0xffffffff = 0xffffffff; 1676 bhsam->bhsam_async_event = 1677 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1678 cfiscsi_pdu_queue(response); 1679 } 1680 cfiscsi_session_terminate(cs); 1681 found++; 1682 } 1683 mtx_unlock(&softc->lock); 1684 1685 if (found == 0) { 1686 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1687 snprintf(ci->error_str, sizeof(ci->error_str), 1688 "No matching connections found"); 1689 return; 1690 } 1691 1692 ci->status = CTL_ISCSI_OK; 1693} 1694 1695static void 1696cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1697{ 1698 struct icl_pdu *response; 1699 struct iscsi_bhs_asynchronous_message *bhsam; 1700 struct ctl_iscsi_logout_params *cilp; 1701 struct cfiscsi_session *cs; 1702 struct cfiscsi_softc *softc; 1703 int found = 0; 1704 1705 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1706 softc = &cfiscsi_softc; 1707 1708 mtx_lock(&softc->lock); 1709 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1710 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1711 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1712 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1713 continue; 1714 1715 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1716 if (response == NULL) { 1717 ci->status = CTL_ISCSI_ERROR; 1718 snprintf(ci->error_str, sizeof(ci->error_str), 1719 "Unable to allocate memory"); 1720 mtx_unlock(&softc->lock); 1721 return; 1722 } 1723 bhsam = 1724 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1725 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1726 bhsam->bhsam_flags = 0x80; 1727 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1728 bhsam->bhsam_parameter3 = htons(10); 1729 cfiscsi_pdu_queue(response); 1730 found++; 1731 } 1732 mtx_unlock(&softc->lock); 1733 1734 if (found == 0) { 1735 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1736 snprintf(ci->error_str, sizeof(ci->error_str), 1737 "No matching connections found"); 1738 return; 1739 } 1740 1741 ci->status = CTL_ISCSI_OK; 1742} 1743 1744#ifdef ICL_KERNEL_PROXY 1745static void 1746cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1747{ 1748 struct ctl_iscsi_listen_params *cilp; 1749 struct sockaddr *sa; 1750 int error; 1751 1752 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1753 1754 if (cfiscsi_softc.listener == NULL) { 1755 CFISCSI_DEBUG("no listener"); 1756 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1757 ci->status = CTL_ISCSI_ERROR; 1758 return; 1759 } 1760 1761 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1762 if (error != 0) { 1763 CFISCSI_DEBUG("getsockaddr, error %d", error); 1764 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1765 ci->status = CTL_ISCSI_ERROR; 1766 return; 1767 } 1768 1769 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1770 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1771 if (error != 0) { 1772 free(sa, M_SONAME); 1773 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1774 snprintf(ci->error_str, sizeof(ci->error_str), 1775 "icl_listen_add failed, error %d", error); 1776 ci->status = CTL_ISCSI_ERROR; 1777 return; 1778 } 1779 1780 ci->status = CTL_ISCSI_OK; 1781} 1782 1783static void 1784cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1785{ 1786 struct ctl_iscsi_accept_params *ciap; 1787 struct cfiscsi_session *cs; 1788 int error; 1789 1790 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1791 1792 mtx_lock(&cfiscsi_softc.lock); 1793 for (;;) { 1794 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1795 if (cs->cs_waiting_for_ctld) 1796 break; 1797 } 1798 if (cs != NULL) 1799 break; 1800 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1801 if (error != 0) { 1802 mtx_unlock(&cfiscsi_softc.lock); 1803 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1804 ci->status = CTL_ISCSI_ERROR; 1805 return; 1806 } 1807 } 1808 mtx_unlock(&cfiscsi_softc.lock); 1809 1810 cs->cs_waiting_for_ctld = false; 1811 cs->cs_login_phase = true; 1812 1813 ciap->connection_id = cs->cs_id; 1814 ciap->portal_id = cs->cs_portal_id; 1815 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1816 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1817 cs->cs_initiator_sa->sa_len); 1818 if (error != 0) { 1819 snprintf(ci->error_str, sizeof(ci->error_str), 1820 "copyout failed with error %d", error); 1821 ci->status = CTL_ISCSI_ERROR; 1822 return; 1823 } 1824 1825 ci->status = CTL_ISCSI_OK; 1826} 1827 1828static void 1829cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1830{ 1831 struct ctl_iscsi_send_params *cisp; 1832 struct cfiscsi_session *cs; 1833 struct icl_pdu *ip; 1834 size_t datalen; 1835 void *data; 1836 int error; 1837 1838 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1839 1840 mtx_lock(&cfiscsi_softc.lock); 1841 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1842 if (cs->cs_id == cisp->connection_id) 1843 break; 1844 } 1845 if (cs == NULL) { 1846 mtx_unlock(&cfiscsi_softc.lock); 1847 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1848 ci->status = CTL_ISCSI_ERROR; 1849 return; 1850 } 1851 mtx_unlock(&cfiscsi_softc.lock); 1852 1853#if 0 1854 if (cs->cs_login_phase == false) 1855 return (EBUSY); 1856#endif 1857 1858 if (cs->cs_terminating) { 1859 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1860 ci->status = CTL_ISCSI_ERROR; 1861 return; 1862 } 1863 1864 datalen = cisp->data_segment_len; 1865 /* 1866 * XXX 1867 */ 1868 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1869 if (datalen > 65535) { 1870 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1871 ci->status = CTL_ISCSI_ERROR; 1872 return; 1873 } 1874 if (datalen > 0) { 1875 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1876 error = copyin(cisp->data_segment, data, datalen); 1877 if (error != 0) { 1878 free(data, M_CFISCSI); 1879 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1880 ci->status = CTL_ISCSI_ERROR; 1881 return; 1882 } 1883 } 1884 1885 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1886 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1887 if (datalen > 0) { 1888 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1889 free(data, M_CFISCSI); 1890 } 1891 CFISCSI_SESSION_LOCK(cs); 1892 icl_pdu_queue(ip); 1893 CFISCSI_SESSION_UNLOCK(cs); 1894 ci->status = CTL_ISCSI_OK; 1895} 1896 1897static void 1898cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1899{ 1900 struct ctl_iscsi_receive_params *cirp; 1901 struct cfiscsi_session *cs; 1902 struct icl_pdu *ip; 1903 void *data; 1904 int error; 1905 1906 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1907 1908 mtx_lock(&cfiscsi_softc.lock); 1909 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1910 if (cs->cs_id == cirp->connection_id) 1911 break; 1912 } 1913 if (cs == NULL) { 1914 mtx_unlock(&cfiscsi_softc.lock); 1915 snprintf(ci->error_str, sizeof(ci->error_str), 1916 "connection not found"); 1917 ci->status = CTL_ISCSI_ERROR; 1918 return; 1919 } 1920 mtx_unlock(&cfiscsi_softc.lock); 1921 1922#if 0 1923 if (is->is_login_phase == false) 1924 return (EBUSY); 1925#endif 1926 1927 CFISCSI_SESSION_LOCK(cs); 1928 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1929 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1930 if (error != 0) { 1931 CFISCSI_SESSION_UNLOCK(cs); 1932 snprintf(ci->error_str, sizeof(ci->error_str), 1933 "interrupted by signal"); 1934 ci->status = CTL_ISCSI_ERROR; 1935 return; 1936 } 1937 } 1938 1939 if (cs->cs_terminating) { 1940 CFISCSI_SESSION_UNLOCK(cs); 1941 snprintf(ci->error_str, sizeof(ci->error_str), 1942 "connection terminating"); 1943 ci->status = CTL_ISCSI_ERROR; 1944 return; 1945 } 1946 ip = cs->cs_login_pdu; 1947 cs->cs_login_pdu = NULL; 1948 CFISCSI_SESSION_UNLOCK(cs); 1949 1950 if (ip->ip_data_len > cirp->data_segment_len) { 1951 icl_pdu_free(ip); 1952 snprintf(ci->error_str, sizeof(ci->error_str), 1953 "data segment too big"); 1954 ci->status = CTL_ISCSI_ERROR; 1955 return; 1956 } 1957 1958 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1959 if (ip->ip_data_len > 0) { 1960 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1961 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1962 copyout(data, cirp->data_segment, ip->ip_data_len); 1963 free(data, M_CFISCSI); 1964 } 1965 1966 icl_pdu_free(ip); 1967 ci->status = CTL_ISCSI_OK; 1968} 1969 1970#endif /* !ICL_KERNEL_PROXY */ 1971 1972static int 1973cfiscsi_ioctl(struct cdev *dev, 1974 u_long cmd, caddr_t addr, int flag, struct thread *td) 1975{ 1976 struct ctl_iscsi *ci; 1977 1978 if (cmd != CTL_ISCSI) 1979 return (ENOTTY); 1980 1981 ci = (struct ctl_iscsi *)addr; 1982 switch (ci->type) { 1983 case CTL_ISCSI_HANDOFF: 1984 cfiscsi_ioctl_handoff(ci); 1985 break; 1986 case CTL_ISCSI_LIST: 1987 cfiscsi_ioctl_list(ci); 1988 break; 1989 case CTL_ISCSI_TERMINATE: 1990 cfiscsi_ioctl_terminate(ci); 1991 break; 1992 case CTL_ISCSI_LOGOUT: 1993 cfiscsi_ioctl_logout(ci); 1994 break; 1995#ifdef ICL_KERNEL_PROXY 1996 case CTL_ISCSI_LISTEN: 1997 cfiscsi_ioctl_listen(ci); 1998 break; 1999 case CTL_ISCSI_ACCEPT: 2000 cfiscsi_ioctl_accept(ci); 2001 break; 2002 case CTL_ISCSI_SEND: 2003 cfiscsi_ioctl_send(ci); 2004 break; 2005 case CTL_ISCSI_RECEIVE: 2006 cfiscsi_ioctl_receive(ci); 2007 break; 2008#else 2009 case CTL_ISCSI_LISTEN: 2010 case CTL_ISCSI_ACCEPT: 2011 case CTL_ISCSI_SEND: 2012 case CTL_ISCSI_RECEIVE: 2013 ci->status = CTL_ISCSI_ERROR; 2014 snprintf(ci->error_str, sizeof(ci->error_str), 2015 "%s: CTL compiled without ICL_KERNEL_PROXY", 2016 __func__); 2017 break; 2018#endif /* !ICL_KERNEL_PROXY */ 2019 default: 2020 ci->status = CTL_ISCSI_ERROR; 2021 snprintf(ci->error_str, sizeof(ci->error_str), 2022 "%s: invalid iSCSI request type %d", __func__, ci->type); 2023 break; 2024 } 2025 2026 return (0); 2027} 2028 2029static int 2030cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 2031{ 2032 struct cfiscsi_session *cs; 2033 struct scsi_vpd_device_id *devid_ptr; 2034 struct scsi_vpd_id_descriptor *desc, *desc1, *desc2, *desc3, *desc4; 2035 struct scsi_vpd_id_t10 *t10id; 2036 struct ctl_lun *lun; 2037 const struct icl_pdu *request; 2038 int i, ret; 2039 char *val; 2040 size_t devid_len, wwpn_len, lun_name_len; 2041 2042 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 2043 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2044 cs = PDU_SESSION(request); 2045 2046 wwpn_len = strlen(cs->cs_target->ct_name); 2047 wwpn_len += strlen(",t,0x0001"); 2048 wwpn_len += 1; /* '\0' */ 2049 if ((wwpn_len % 4) != 0) 2050 wwpn_len += (4 - (wwpn_len % 4)); 2051 2052 if (lun == NULL) { 2053 lun_name_len = 0; 2054 } else { 2055 lun_name_len = strlen(cs->cs_target->ct_name); 2056 lun_name_len += strlen(",lun,XXXXXXXX"); 2057 lun_name_len += 1; /* '\0' */ 2058 if ((lun_name_len % 4) != 0) 2059 lun_name_len += (4 - (lun_name_len % 4)); 2060 } 2061 2062 devid_len = sizeof(struct scsi_vpd_device_id) + 2063 sizeof(struct scsi_vpd_id_descriptor) + 2064 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 2065 sizeof(struct scsi_vpd_id_descriptor) + lun_name_len + 2066 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 2067 sizeof(struct scsi_vpd_id_descriptor) + 2068 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 2069 sizeof(struct scsi_vpd_id_descriptor) + 2070 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 2071 2072 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 2073 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 2074 ctsio->kern_sg_entries = 0; 2075 2076 if (devid_len < alloc_len) { 2077 ctsio->residual = alloc_len - devid_len; 2078 ctsio->kern_data_len = devid_len; 2079 ctsio->kern_total_len = devid_len; 2080 } else { 2081 ctsio->residual = 0; 2082 ctsio->kern_data_len = alloc_len; 2083 ctsio->kern_total_len = alloc_len; 2084 } 2085 ctsio->kern_data_resid = 0; 2086 ctsio->kern_rel_offset = 0; 2087 ctsio->kern_sg_entries = 0; 2088 2089 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 2090 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 2091 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 2092 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 2093 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 2094 lun_name_len); 2095 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 2096 wwpn_len); 2097 desc4 = (struct scsi_vpd_id_descriptor *)(&desc3->identifier[0] + 2098 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 2099 2100 if (lun != NULL) 2101 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2102 lun->be_lun->lun_type; 2103 else 2104 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2105 2106 devid_ptr->page_code = SVPD_DEVICE_ID; 2107 2108 scsi_ulto2b(devid_len - 4, devid_ptr->length); 2109 2110 /* 2111 * We're using a LUN association here. i.e., this device ID is a 2112 * per-LUN identifier. 2113 */ 2114 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2115 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2116 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 2117 if (lun == NULL || (val = ctl_get_opt(lun->be_lun, "vendor")) == NULL) { 2118 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2119 } else { 2120 memset(t10id->vendor, ' ', sizeof(t10id->vendor)); 2121 strncpy(t10id->vendor, val, 2122 min(sizeof(t10id->vendor), strlen(val))); 2123 } 2124 2125 /* 2126 * If we've actually got a backend, copy the device id from the 2127 * per-LUN data. Otherwise, set it to all spaces. 2128 */ 2129 if (lun != NULL) { 2130 /* 2131 * Copy the backend's LUN ID. 2132 */ 2133 strncpy((char *)t10id->vendor_spec_id, 2134 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2135 } else { 2136 /* 2137 * No backend, set this to spaces. 2138 */ 2139 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2140 } 2141 2142 /* 2143 * desc1 is for the unique LUN name. 2144 * 2145 * XXX: According to SPC-3, LUN must report the same ID through 2146 * all the ports. The code below, however, reports the 2147 * ID only via iSCSI. 2148 */ 2149 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2150 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | 2151 SVPD_ID_TYPE_SCSI_NAME; 2152 desc1->length = lun_name_len; 2153 if (lun != NULL) { 2154 /* 2155 * Find the per-target LUN number. 2156 */ 2157 for (i = 0; i < CTL_MAX_LUNS; i++) { 2158 if (cs->cs_target->ct_luns[i] == lun->lun) 2159 break; 2160 } 2161 KASSERT(i < CTL_MAX_LUNS, 2162 ("lun %jd not found", (uintmax_t)lun->lun)); 2163 ret = snprintf(desc1->identifier, lun_name_len, "%s,lun,%d", 2164 cs->cs_target->ct_name, i); 2165 KASSERT(ret > 0 && ret <= lun_name_len, ("bad snprintf")); 2166 } else { 2167 KASSERT(lun_name_len == 0, ("no lun, but lun_name_len != 0")); 2168 } 2169 2170 /* 2171 * desc2 is for the WWPN which is a port asscociation. 2172 */ 2173 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2174 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2175 SVPD_ID_TYPE_SCSI_NAME; 2176 desc2->length = wwpn_len; 2177 snprintf(desc2->identifier, wwpn_len, "%s,t,0x%4.4x", 2178 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2179 2180 /* 2181 * desc3 is for the Relative Target Port(type 4h) identifier 2182 */ 2183 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2184 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2185 SVPD_ID_TYPE_RELTARG; 2186 desc3->length = 4; 2187 desc3->identifier[3] = 1; 2188 2189 /* 2190 * desc4 is for the Target Port Group(type 5h) identifier 2191 */ 2192 desc4->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2193 desc4->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2194 SVPD_ID_TYPE_TPORTGRP; 2195 desc4->length = 4; 2196 desc4->identifier[3] = 1; 2197 2198 ctsio->scsi_status = SCSI_STATUS_OK; 2199 2200 ctsio->be_move_done = ctl_config_move_done; 2201 ctl_datamove((union ctl_io *)ctsio); 2202 2203 return (CTL_RETVAL_COMPLETE); 2204} 2205 2206static void 2207cfiscsi_target_hold(struct cfiscsi_target *ct) 2208{ 2209 2210 refcount_acquire(&ct->ct_refcount); 2211} 2212 2213static void 2214cfiscsi_target_release(struct cfiscsi_target *ct) 2215{ 2216 struct cfiscsi_softc *softc; 2217 2218 softc = ct->ct_softc; 2219 mtx_lock(&softc->lock); 2220 if (refcount_release(&ct->ct_refcount)) { 2221 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2222 mtx_unlock(&softc->lock); 2223 free(ct, M_CFISCSI); 2224 2225 return; 2226 } 2227 mtx_unlock(&softc->lock); 2228} 2229 2230static struct cfiscsi_target * 2231cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2232{ 2233 struct cfiscsi_target *ct; 2234 2235 mtx_lock(&softc->lock); 2236 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2237 if (strcmp(name, ct->ct_name) != 0) 2238 continue; 2239 cfiscsi_target_hold(ct); 2240 mtx_unlock(&softc->lock); 2241 return (ct); 2242 } 2243 mtx_unlock(&softc->lock); 2244 2245 return (NULL); 2246} 2247 2248static struct cfiscsi_target * 2249cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2250 const char *alias) 2251{ 2252 struct cfiscsi_target *ct, *newct; 2253 int i; 2254 2255 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2256 return (NULL); 2257 2258 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 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 free(newct, M_CFISCSI); 2267 return (ct); 2268 } 2269 2270 for (i = 0; i < CTL_MAX_LUNS; i++) 2271 newct->ct_luns[i] = -1; 2272 2273 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2274 if (alias != NULL) 2275 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2276 refcount_init(&newct->ct_refcount, 1); 2277 newct->ct_softc = softc; 2278 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2279 mtx_unlock(&softc->lock); 2280 2281 return (newct); 2282} 2283 2284/* 2285 * Takes LUN from the target space and returns LUN from the CTL space. 2286 */ 2287static uint32_t 2288cfiscsi_map_lun(void *arg, uint32_t lun) 2289{ 2290 struct cfiscsi_session *cs; 2291 2292 cs = arg; 2293 2294 if (lun >= CTL_MAX_LUNS) { 2295 CFISCSI_DEBUG("requested lun number %d is higher " 2296 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2297 return (0xffffffff); 2298 } 2299 2300 if (cs->cs_target->ct_luns[lun] < 0) 2301 return (0xffffffff); 2302 2303 return (cs->cs_target->ct_luns[lun]); 2304} 2305 2306static int 2307cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2308 unsigned long lun_id, unsigned long ctl_lun_id) 2309{ 2310 2311 if (lun_id >= CTL_MAX_LUNS) { 2312 CFISCSI_WARN("requested lun number %ld is higher " 2313 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2314 return (-1); 2315 } 2316 2317 if (ct->ct_luns[lun_id] >= 0) { 2318 /* 2319 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2320 * when the LUN is created, and a second time just before 2321 * the port is brought online; don't emit warnings 2322 * for that case. 2323 */ 2324 if (ct->ct_luns[lun_id] == ctl_lun_id) 2325 return (0); 2326 CFISCSI_WARN("lun %ld already allocated", lun_id); 2327 return (-1); 2328 } 2329 2330#if 0 2331 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2332 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2333#endif 2334 2335 ct->ct_luns[lun_id] = ctl_lun_id; 2336 cfiscsi_target_hold(ct); 2337 2338 return (0); 2339} 2340 2341static int 2342cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2343{ 2344 2345 if (ct->ct_luns[lun_id] < 0) { 2346 CFISCSI_WARN("lun %ld not allocated", lun_id); 2347 return (-1); 2348 } 2349 2350 ct->ct_luns[lun_id] = -1; 2351 cfiscsi_target_release(ct); 2352 2353 return (0); 2354} 2355 2356static int 2357cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2358{ 2359 struct cfiscsi_softc *softc; 2360 struct cfiscsi_target *ct; 2361 const char *target = NULL, *target_alias = NULL; 2362 const char *lun = NULL; 2363 unsigned long tmp; 2364 2365 softc = (struct cfiscsi_softc *)arg; 2366 2367 target = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun, 2368 "cfiscsi_target"); 2369 target_alias = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun, 2370 "cfiscsi_target)alias"); 2371 lun = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun, 2372 "cfiscsi_lun"); 2373 2374 if (target == NULL && lun == NULL) 2375 return (0); 2376 2377 if (target == NULL || lun == NULL) { 2378 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2379 "cfiscsi_lun, or the other way around; ignoring"); 2380 return (0); 2381 } 2382 2383 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2384 if (ct == NULL) { 2385 CFISCSI_WARN("failed to create target \"%s\"", target); 2386 return (0); 2387 } 2388 2389 tmp = strtoul(lun, NULL, 10); 2390 cfiscsi_target_set_lun(ct, tmp, lun_id); 2391 cfiscsi_target_release(ct); 2392 return (0); 2393} 2394 2395static int 2396cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2397{ 2398 struct cfiscsi_softc *softc; 2399 struct cfiscsi_target *ct; 2400 int i; 2401 2402 softc = (struct cfiscsi_softc *)arg; 2403 2404 mtx_lock(&softc->lock); 2405 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2406 for (i = 0; i < CTL_MAX_LUNS; i++) { 2407 if (ct->ct_luns[i] < 0) 2408 continue; 2409 if (ct->ct_luns[i] != lun_id) 2410 continue; 2411 mtx_unlock(&softc->lock); 2412 cfiscsi_target_unset_lun(ct, i); 2413 return (0); 2414 } 2415 } 2416 mtx_unlock(&softc->lock); 2417 return (0); 2418} 2419 2420static void 2421cfiscsi_datamove_in(union ctl_io *io) 2422{ 2423 struct cfiscsi_session *cs; 2424 struct icl_pdu *request, *response; 2425 const struct iscsi_bhs_scsi_command *bhssc; 2426 struct iscsi_bhs_data_in *bhsdi; 2427 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2428 size_t len, expected_len, sg_len, buffer_offset; 2429 const char *sg_addr; 2430 int ctl_sg_count, error, i; 2431 2432 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2433 cs = PDU_SESSION(request); 2434 2435 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2436 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2437 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2438 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2439 2440 if (io->scsiio.kern_sg_entries > 0) { 2441 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2442 ctl_sg_count = io->scsiio.kern_sg_entries; 2443 } else { 2444 ctl_sglist = &ctl_sg_entry; 2445 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2446 ctl_sglist->len = io->scsiio.kern_data_len; 2447 ctl_sg_count = 1; 2448 } 2449 2450 /* 2451 * This is the total amount of data to be transferred within the current 2452 * SCSI command. We need to record it so that we can properly report 2453 * underflow/underflow. 2454 */ 2455 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2456 2457 /* 2458 * This is the offset within the current SCSI command; for the first 2459 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2460 * it will be the sum of lengths of previous ones. 2461 */ 2462 buffer_offset = io->scsiio.kern_rel_offset; 2463 2464 /* 2465 * This is the transfer length expected by the initiator. In theory, 2466 * it could be different from the correct amount of data from the SCSI 2467 * point of view, even if that doesn't make any sense. 2468 */ 2469 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2470#if 0 2471 if (expected_len != io->scsiio.kern_total_len) { 2472 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2473 "actual length %zd", expected_len, 2474 (size_t)io->scsiio.kern_total_len); 2475 } 2476#endif 2477 2478 if (buffer_offset >= expected_len) { 2479#if 0 2480 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2481 "already sent the expected len", buffer_offset); 2482#endif 2483 io->scsiio.be_move_done(io); 2484 return; 2485 } 2486 2487 i = 0; 2488 sg_addr = NULL; 2489 sg_len = 0; 2490 response = NULL; 2491 bhsdi = NULL; 2492 for (;;) { 2493 if (response == NULL) { 2494 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2495 if (response == NULL) { 2496 CFISCSI_SESSION_WARN(cs, "failed to " 2497 "allocate memory; dropping connection"); 2498 ctl_set_busy(&io->scsiio); 2499 io->scsiio.be_move_done(io); 2500 cfiscsi_session_terminate(cs); 2501 return; 2502 } 2503 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2504 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2505 bhsdi->bhsdi_initiator_task_tag = 2506 bhssc->bhssc_initiator_task_tag; 2507 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2508 PDU_EXPDATASN(request)++; 2509 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2510 } 2511 2512 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2513 if (sg_len == 0) { 2514 sg_addr = ctl_sglist[i].addr; 2515 sg_len = ctl_sglist[i].len; 2516 KASSERT(sg_len > 0, ("sg_len <= 0")); 2517 } 2518 2519 len = sg_len; 2520 2521 /* 2522 * Truncate to maximum data segment length. 2523 */ 2524 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2525 ("ip_data_len %zd >= max_data_segment_length %zd", 2526 response->ip_data_len, cs->cs_max_data_segment_length)); 2527 if (response->ip_data_len + len > 2528 cs->cs_max_data_segment_length) { 2529 len = cs->cs_max_data_segment_length - 2530 response->ip_data_len; 2531 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2532 len, sg_len)); 2533 } 2534 2535 /* 2536 * Truncate to expected data transfer length. 2537 */ 2538 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2539 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2540 buffer_offset, response->ip_data_len, expected_len)); 2541 if (buffer_offset + response->ip_data_len + len > expected_len) { 2542 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2543 "to expected data transfer length %zd", 2544 buffer_offset + response->ip_data_len + len, expected_len); 2545 len = expected_len - (buffer_offset + response->ip_data_len); 2546 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2547 len, sg_len)); 2548 } 2549 2550 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2551 if (error != 0) { 2552 CFISCSI_SESSION_WARN(cs, "failed to " 2553 "allocate memory; dropping connection"); 2554 icl_pdu_free(response); 2555 ctl_set_busy(&io->scsiio); 2556 io->scsiio.be_move_done(io); 2557 cfiscsi_session_terminate(cs); 2558 return; 2559 } 2560 sg_addr += len; 2561 sg_len -= len; 2562 2563 KASSERT(buffer_offset + request->ip_data_len <= expected_len, 2564 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2565 buffer_offset, request->ip_data_len, expected_len)); 2566 if (buffer_offset + request->ip_data_len == expected_len) { 2567 /* 2568 * Already have the amount of data the initiator wanted. 2569 */ 2570 break; 2571 } 2572 2573 if (sg_len == 0) { 2574 /* 2575 * End of scatter-gather segment; 2576 * proceed to the next one... 2577 */ 2578 if (i == ctl_sg_count - 1) { 2579 /* 2580 * ... unless this was the last one. 2581 */ 2582 break; 2583 } 2584 i++; 2585 } 2586 2587 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2588 /* 2589 * Can't stuff more data into the current PDU; 2590 * queue it. Note that's not enough to check 2591 * for kern_data_resid == 0 instead; there 2592 * may be several Data-In PDUs for the final 2593 * call to cfiscsi_datamove(), and we want 2594 * to set the F flag only on the last of them. 2595 */ 2596 buffer_offset += response->ip_data_len; 2597 if (buffer_offset == io->scsiio.kern_total_len || 2598 buffer_offset == expected_len) 2599 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2600 cfiscsi_pdu_queue(response); 2601 response = NULL; 2602 bhsdi = NULL; 2603 } 2604 } 2605 if (response != NULL) { 2606 buffer_offset += response->ip_data_len; 2607 if (buffer_offset == io->scsiio.kern_total_len || 2608 buffer_offset == expected_len) 2609 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2610 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2611 cfiscsi_pdu_queue(response); 2612 } 2613 2614 io->scsiio.be_move_done(io); 2615} 2616 2617static void 2618cfiscsi_datamove_out(union ctl_io *io) 2619{ 2620 struct cfiscsi_session *cs; 2621 struct icl_pdu *request, *response; 2622 const struct iscsi_bhs_scsi_command *bhssc; 2623 struct iscsi_bhs_r2t *bhsr2t; 2624 struct cfiscsi_data_wait *cdw; 2625 uint32_t target_transfer_tag; 2626 bool done; 2627 2628 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2629 cs = PDU_SESSION(request); 2630 2631 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2632 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2633 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2634 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2635 2636 /* 2637 * We need to record it so that we can properly report 2638 * underflow/underflow. 2639 */ 2640 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2641 2642 /* 2643 * We hadn't received anything during this datamove yet. 2644 */ 2645 io->scsiio.ext_data_filled = 0; 2646 2647 target_transfer_tag = 2648 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2649 2650#if 0 2651 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2652 "task tag 0x%x, target transfer tag 0x%x", 2653 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2654#endif 2655 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2656 if (cdw == NULL) { 2657 CFISCSI_SESSION_WARN(cs, "failed to " 2658 "allocate memory; dropping connection"); 2659 ctl_set_busy(&io->scsiio); 2660 io->scsiio.be_move_done(io); 2661 cfiscsi_session_terminate(cs); 2662 return; 2663 } 2664 cdw->cdw_ctl_io = io; 2665 cdw->cdw_target_transfer_tag = target_transfer_tag; 2666 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2667 2668 if (cs->cs_immediate_data && io->scsiio.kern_rel_offset == 0 && 2669 icl_pdu_data_segment_length(request) > 0) { 2670 done = cfiscsi_handle_data_segment(request, cdw); 2671 if (done) { 2672 uma_zfree(cfiscsi_data_wait_zone, cdw); 2673 io->scsiio.be_move_done(io); 2674 return; 2675 } 2676 } 2677 2678 CFISCSI_SESSION_LOCK(cs); 2679 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2680 CFISCSI_SESSION_UNLOCK(cs); 2681 2682 /* 2683 * XXX: We should limit the number of outstanding R2T PDUs 2684 * per task to MaxOutstandingR2T. 2685 */ 2686 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2687 if (response == NULL) { 2688 CFISCSI_SESSION_WARN(cs, "failed to " 2689 "allocate memory; dropping connection"); 2690 ctl_set_busy(&io->scsiio); 2691 io->scsiio.be_move_done(io); 2692 cfiscsi_session_terminate(cs); 2693 return; 2694 } 2695 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2696 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2697 bhsr2t->bhsr2t_flags = 0x80; 2698 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2699 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2700 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2701 /* 2702 * XXX: Here we assume that cfiscsi_datamove() won't ever 2703 * be running concurrently on several CPUs for a given 2704 * command. 2705 */ 2706 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2707 PDU_R2TSN(request)++; 2708 /* 2709 * This is the offset within the current SCSI command; 2710 * i.e. for the first call of datamove(), it will be 0, 2711 * and for subsequent ones it will be the sum of lengths 2712 * of previous ones. 2713 * 2714 * The ext_data_filled is to account for unsolicited 2715 * (immediate) data that might have already arrived. 2716 */ 2717 bhsr2t->bhsr2t_buffer_offset = 2718 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2719 /* 2720 * This is the total length (sum of S/G lengths) this call 2721 * to cfiscsi_datamove() is supposed to handle. 2722 * 2723 * XXX: Limit it to MaxBurstLength. 2724 */ 2725 bhsr2t->bhsr2t_desired_data_transfer_length = 2726 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2727 cfiscsi_pdu_queue(response); 2728} 2729 2730static void 2731cfiscsi_datamove(union ctl_io *io) 2732{ 2733 2734 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2735 cfiscsi_datamove_in(io); 2736 else 2737 cfiscsi_datamove_out(io); 2738} 2739 2740static void 2741cfiscsi_scsi_command_done(union ctl_io *io) 2742{ 2743 struct icl_pdu *request, *response; 2744 struct iscsi_bhs_scsi_command *bhssc; 2745 struct iscsi_bhs_scsi_response *bhssr; 2746#ifdef DIAGNOSTIC 2747 struct cfiscsi_data_wait *cdw; 2748#endif 2749 struct cfiscsi_session *cs; 2750 uint16_t sense_length; 2751 2752 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2753 cs = PDU_SESSION(request); 2754 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2755 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2756 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2757 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2758 2759 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2760 // bhssc->bhssc_initiator_task_tag); 2761 2762#ifdef DIAGNOSTIC 2763 CFISCSI_SESSION_LOCK(cs); 2764 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2765 KASSERT(bhssc->bhssc_initiator_task_tag != 2766 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2767 CFISCSI_SESSION_UNLOCK(cs); 2768#endif 2769 2770 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2771 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2772 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2773 bhssr->bhssr_flags = 0x80; 2774 /* 2775 * XXX: We don't deal with bidirectional under/overflows; 2776 * does anything actually support those? 2777 */ 2778 if (PDU_TOTAL_TRANSFER_LEN(request) < 2779 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2780 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2781 bhssr->bhssr_residual_count = 2782 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2783 PDU_TOTAL_TRANSFER_LEN(request)); 2784 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2785 // ntohl(bhssr->bhssr_residual_count)); 2786 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2787 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2788 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2789 bhssr->bhssr_residual_count = 2790 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2791 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2792 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2793 // ntohl(bhssr->bhssr_residual_count)); 2794 } 2795 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2796 bhssr->bhssr_status = io->scsiio.scsi_status; 2797 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2798 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2799 2800 if (io->scsiio.sense_len > 0) { 2801#if 0 2802 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2803 io->scsiio.sense_len); 2804#endif 2805 sense_length = htons(io->scsiio.sense_len); 2806 icl_pdu_append_data(response, 2807 &sense_length, sizeof(sense_length), M_WAITOK); 2808 icl_pdu_append_data(response, 2809 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2810 } 2811 2812 ctl_free_io(io); 2813 icl_pdu_free(request); 2814 cfiscsi_pdu_queue(response); 2815} 2816 2817static void 2818cfiscsi_task_management_done(union ctl_io *io) 2819{ 2820 struct icl_pdu *request, *response; 2821 struct iscsi_bhs_task_management_request *bhstmr; 2822 struct iscsi_bhs_task_management_response *bhstmr2; 2823 struct cfiscsi_data_wait *cdw, *tmpcdw; 2824 struct cfiscsi_session *cs; 2825 2826 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2827 cs = PDU_SESSION(request); 2828 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2829 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2830 ISCSI_BHS_OPCODE_TASK_REQUEST, 2831 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2832 2833#if 0 2834 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2835 bhstmr->bhstmr_initiator_task_tag, 2836 bhstmr->bhstmr_referenced_task_tag); 2837#endif 2838 2839 if ((bhstmr->bhstmr_function & ~0x80) == 2840 BHSTMR_FUNCTION_ABORT_TASK) { 2841 /* 2842 * Make sure we no longer wait for Data-Out for this command. 2843 */ 2844 CFISCSI_SESSION_LOCK(cs); 2845 TAILQ_FOREACH_SAFE(cdw, 2846 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2847 if (bhstmr->bhstmr_referenced_task_tag != 2848 cdw->cdw_initiator_task_tag) 2849 continue; 2850 2851#if 0 2852 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2853 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2854#endif 2855 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2856 cdw, cdw_next); 2857 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2858 uma_zfree(cfiscsi_data_wait_zone, cdw); 2859 } 2860 CFISCSI_SESSION_UNLOCK(cs); 2861 } 2862 2863 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2864 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2865 response->ip_bhs; 2866 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2867 bhstmr2->bhstmr_flags = 0x80; 2868 if (io->io_hdr.status == CTL_SUCCESS) { 2869 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2870 } else { 2871 /* 2872 * XXX: How to figure out what exactly went wrong? iSCSI spec 2873 * expects us to provide detailed error, e.g. "Task does 2874 * not exist" or "LUN does not exist". 2875 */ 2876 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2877 bhstmr2->bhstmr_response = 2878 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2879 } 2880 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2881 2882 ctl_free_io(io); 2883 icl_pdu_free(request); 2884 cfiscsi_pdu_queue(response); 2885} 2886 2887static void 2888cfiscsi_done(union ctl_io *io) 2889{ 2890 struct icl_pdu *request; 2891 struct cfiscsi_session *cs; 2892 2893 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2894 ("invalid CTL status %#x", io->io_hdr.status)); 2895 2896 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2897 if (request == NULL) { 2898 /* 2899 * Implicit task termination has just completed; nothing to do. 2900 */ 2901 return; 2902 } 2903 2904 cs = PDU_SESSION(request); 2905 refcount_release(&cs->cs_outstanding_ctl_pdus); 2906 2907 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2908 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2909 cfiscsi_scsi_command_done(io); 2910 break; 2911 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2912 cfiscsi_task_management_done(io); 2913 break; 2914 default: 2915 panic("cfiscsi_done called with wrong opcode 0x%x", 2916 request->ip_bhs->bhs_opcode); 2917 } 2918} 2919