ctl_frontend_iscsi.c revision 279003
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 279003 2015-02-19 14:33:46Z 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 279003 2015-02-19 14:33:46Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capability.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include <dev/iscsi/icl.h> 71#include <dev/iscsi/iscsi_proto.h> 72#include <cam/ctl/ctl_frontend_iscsi.h> 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 1; 88TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95static int login_timeout = 60; 96TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99static int maxcmdsn_delta = 256; 100TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105#define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113#define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130#define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145#define PDU_EXPDATASN(X) (X)->ip_prv0 146#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147#define PDU_R2TSN(X) (X)->ip_prv2 148 149int cfiscsi_init(void); 150static void cfiscsi_online(void *arg); 151static void cfiscsi_offline(void *arg); 152static int cfiscsi_info(void *arg, struct sbuf *sb); 153static int cfiscsi_lun_enable(void *arg, 154 struct ctl_id target_id, int lun_id); 155static int cfiscsi_lun_disable(void *arg, 156 struct ctl_id target_id, int lun_id); 157static int cfiscsi_ioctl(struct cdev *dev, 158 u_long cmd, caddr_t addr, int flag, struct thread *td); 159static void cfiscsi_datamove(union ctl_io *io); 160static void cfiscsi_datamove_in(union ctl_io *io); 161static void cfiscsi_datamove_out(union ctl_io *io); 162static void cfiscsi_done(union ctl_io *io); 163static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 164static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 165static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 168static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 169static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 170static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 171 *softc, const char *name, uint16_t tag); 172static struct cfiscsi_target *cfiscsi_target_find_or_create( 173 struct cfiscsi_softc *softc, const char *name, const char *alias, 174 uint16_t tag); 175static void cfiscsi_target_release(struct cfiscsi_target *ct); 176static void cfiscsi_session_delete(struct cfiscsi_session *cs); 177 178static struct cfiscsi_softc cfiscsi_softc; 179extern struct ctl_softc *control_softc; 180 181static struct ctl_frontend cfiscsi_frontend = 182{ 183 .name = "iscsi", 184 .init = cfiscsi_init, 185 .ioctl = cfiscsi_ioctl, 186}; 187CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 188MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 189 190static struct icl_pdu * 191cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 192{ 193 194 return (icl_pdu_new(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 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 241 /* 242 * The target MUST silently ignore any non-immediate command 243 * outside of this range. 244 */ 245 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 246 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 247 CFISCSI_SESSION_UNLOCK(cs); 248 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 249 "while expected %u", cmdsn, cs->cs_cmdsn); 250 return (true); 251 } 252 253 /* 254 * We don't support multiple connections now, so any 255 * discontinuity in CmdSN means lost PDUs. Since we don't 256 * support PDU retransmission -- terminate the connection. 257 */ 258 if (cmdsn != cs->cs_cmdsn) { 259 CFISCSI_SESSION_UNLOCK(cs); 260 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 261 "while expected %u; dropping connection", 262 cmdsn, cs->cs_cmdsn); 263 cfiscsi_session_terminate(cs); 264 return (true); 265 } 266 cs->cs_cmdsn++; 267 } 268 269 CFISCSI_SESSION_UNLOCK(cs); 270 271 return (false); 272} 273 274static void 275cfiscsi_pdu_handle(struct icl_pdu *request) 276{ 277 struct cfiscsi_session *cs; 278 bool ignore; 279 280 cs = PDU_SESSION(request); 281 282 ignore = cfiscsi_pdu_update_cmdsn(request); 283 if (ignore) { 284 icl_pdu_free(request); 285 return; 286 } 287 288 /* 289 * Handle the PDU; this includes e.g. receiving the remaining 290 * part of PDU and submitting the SCSI command to CTL 291 * or queueing a reply. The handling routine is responsible 292 * for freeing the PDU when it's no longer needed. 293 */ 294 switch (request->ip_bhs->bhs_opcode & 295 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 296 case ISCSI_BHS_OPCODE_NOP_OUT: 297 cfiscsi_pdu_handle_nop_out(request); 298 break; 299 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 300 cfiscsi_pdu_handle_scsi_command(request); 301 break; 302 case ISCSI_BHS_OPCODE_TASK_REQUEST: 303 cfiscsi_pdu_handle_task_request(request); 304 break; 305 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 306 cfiscsi_pdu_handle_data_out(request); 307 break; 308 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 309 cfiscsi_pdu_handle_logout_request(request); 310 break; 311 default: 312 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 313 "opcode 0x%x; dropping connection", 314 request->ip_bhs->bhs_opcode); 315 icl_pdu_free(request); 316 cfiscsi_session_terminate(cs); 317 } 318 319} 320 321static void 322cfiscsi_receive_callback(struct icl_pdu *request) 323{ 324 struct cfiscsi_session *cs; 325 326 cs = PDU_SESSION(request); 327 328#ifdef ICL_KERNEL_PROXY 329 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 330 if (cs->cs_login_pdu == NULL) 331 cs->cs_login_pdu = request; 332 else 333 icl_pdu_free(request); 334 cv_signal(&cs->cs_login_cv); 335 return; 336 } 337#endif 338 339 cfiscsi_pdu_handle(request); 340} 341 342static void 343cfiscsi_error_callback(struct icl_conn *ic) 344{ 345 struct cfiscsi_session *cs; 346 347 cs = CONN_SESSION(ic); 348 349 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 350 cfiscsi_session_terminate(cs); 351} 352 353static int 354cfiscsi_pdu_prepare(struct icl_pdu *response) 355{ 356 struct cfiscsi_session *cs; 357 struct iscsi_bhs_scsi_response *bhssr; 358 bool advance_statsn = true; 359 360 cs = PDU_SESSION(response); 361 362 CFISCSI_SESSION_LOCK_ASSERT(cs); 363 364 /* 365 * We're only using fields common for all the response 366 * (target -> initiator) PDUs. 367 */ 368 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 369 370 /* 371 * 10.8.3: "The StatSN for this connection is not advanced 372 * after this PDU is sent." 373 */ 374 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 375 advance_statsn = false; 376 377 /* 378 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 379 * StatSN for the connection is not advanced after this PDU is sent." 380 */ 381 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 382 bhssr->bhssr_initiator_task_tag == 0xffffffff) 383 advance_statsn = false; 384 385 /* 386 * See the comment below - StatSN is not meaningful and must 387 * not be advanced. 388 */ 389 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 390 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 391 advance_statsn = false; 392 393 /* 394 * 10.7.3: "The fields StatSN, Status, and Residual Count 395 * only have meaningful content if the S bit is set to 1." 396 */ 397 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 398 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 399 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 400 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 401 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 402 403 if (advance_statsn) 404 cs->cs_statsn++; 405 406 return (0); 407} 408 409static void 410cfiscsi_pdu_queue(struct icl_pdu *response) 411{ 412 struct cfiscsi_session *cs; 413 414 cs = PDU_SESSION(response); 415 416 CFISCSI_SESSION_LOCK(cs); 417 cfiscsi_pdu_prepare(response); 418 icl_pdu_queue(response); 419 CFISCSI_SESSION_UNLOCK(cs); 420} 421 422static uint32_t 423cfiscsi_decode_lun(uint64_t encoded) 424{ 425 uint8_t lun[8]; 426 uint32_t result; 427 428 /* 429 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 430 * but is in fact an evil, multidimensional structure defined 431 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 432 */ 433 memcpy(lun, &encoded, sizeof(lun)); 434 switch (lun[0] & 0xC0) { 435 case 0x00: 436 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 437 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 438 CFISCSI_WARN("malformed LUN " 439 "(peripheral device addressing method): 0x%jx", 440 (uintmax_t)encoded); 441 result = 0xffffffff; 442 break; 443 } 444 result = lun[1]; 445 break; 446 case 0x40: 447 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 448 lun[6] != 0 || lun[7] != 0) { 449 CFISCSI_WARN("malformed LUN " 450 "(flat address space addressing method): 0x%jx", 451 (uintmax_t)encoded); 452 result = 0xffffffff; 453 break; 454 } 455 result = ((lun[0] & 0x3f) << 8) + lun[1]; 456 break; 457 case 0xC0: 458 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 459 lun[6] != 0 || lun[7] != 0) { 460 CFISCSI_WARN("malformed LUN (extended flat " 461 "address space addressing method): 0x%jx", 462 (uintmax_t)encoded); 463 result = 0xffffffff; 464 break; 465 } 466 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 467 default: 468 CFISCSI_WARN("unsupported LUN format 0x%jx", 469 (uintmax_t)encoded); 470 result = 0xffffffff; 471 break; 472 } 473 474 return (result); 475} 476 477static void 478cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 479{ 480 struct cfiscsi_session *cs; 481 struct iscsi_bhs_nop_out *bhsno; 482 struct iscsi_bhs_nop_in *bhsni; 483 struct icl_pdu *response; 484 void *data = NULL; 485 size_t datasize; 486 int error; 487 488 cs = PDU_SESSION(request); 489 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 490 491 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 492 /* 493 * Nothing to do, iscsi_pdu_update_statsn() already 494 * zeroed the timeout. 495 */ 496 icl_pdu_free(request); 497 return; 498 } 499 500 datasize = icl_pdu_data_segment_length(request); 501 if (datasize > 0) { 502 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 503 if (data == NULL) { 504 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 505 "dropping connection"); 506 icl_pdu_free(request); 507 cfiscsi_session_terminate(cs); 508 return; 509 } 510 icl_pdu_get_data(request, 0, data, datasize); 511 } 512 513 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 514 if (response == NULL) { 515 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 516 "droppping connection"); 517 free(data, M_CFISCSI); 518 icl_pdu_free(request); 519 cfiscsi_session_terminate(cs); 520 return; 521 } 522 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 523 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 524 bhsni->bhsni_flags = 0x80; 525 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 526 bhsni->bhsni_target_transfer_tag = 0xffffffff; 527 if (datasize > 0) { 528 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 529 if (error != 0) { 530 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 531 "dropping connection"); 532 free(data, M_CFISCSI); 533 icl_pdu_free(request); 534 icl_pdu_free(response); 535 cfiscsi_session_terminate(cs); 536 return; 537 } 538 free(data, M_CFISCSI); 539 } 540 541 icl_pdu_free(request); 542 cfiscsi_pdu_queue(response); 543} 544 545static void 546cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 547{ 548 struct iscsi_bhs_scsi_command *bhssc; 549 struct cfiscsi_session *cs; 550 union ctl_io *io; 551 int error; 552 553 cs = PDU_SESSION(request); 554 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 555 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 556 // bhssc->bhssc_initiator_task_tag); 557 558 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 559 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 560 "ImmediateData=No; dropping connection"); 561 icl_pdu_free(request); 562 cfiscsi_session_terminate(cs); 563 return; 564 } 565 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 566 ctl_zero_io(io); 567 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 568 io->io_hdr.io_type = CTL_IO_SCSI; 569 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 570 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 571 io->io_hdr.nexus.targ_target.id = 0; 572 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 573 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 574 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 575 case BHSSC_FLAGS_ATTR_UNTAGGED: 576 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 577 break; 578 case BHSSC_FLAGS_ATTR_SIMPLE: 579 io->scsiio.tag_type = CTL_TAG_SIMPLE; 580 break; 581 case BHSSC_FLAGS_ATTR_ORDERED: 582 io->scsiio.tag_type = CTL_TAG_ORDERED; 583 break; 584 case BHSSC_FLAGS_ATTR_HOQ: 585 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 586 break; 587 case BHSSC_FLAGS_ATTR_ACA: 588 io->scsiio.tag_type = CTL_TAG_ACA; 589 break; 590 default: 591 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 592 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 593 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 594 break; 595 } 596 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 597 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 598 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 599 error = ctl_queue(io); 600 if (error != CTL_RETVAL_COMPLETE) { 601 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 602 "dropping connection", error); 603 ctl_free_io(io); 604 refcount_release(&cs->cs_outstanding_ctl_pdus); 605 icl_pdu_free(request); 606 cfiscsi_session_terminate(cs); 607 } 608} 609 610static void 611cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 612{ 613 struct iscsi_bhs_task_management_request *bhstmr; 614 struct iscsi_bhs_task_management_response *bhstmr2; 615 struct icl_pdu *response; 616 struct cfiscsi_session *cs; 617 union ctl_io *io; 618 int error; 619 620 cs = PDU_SESSION(request); 621 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 622 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 623 ctl_zero_io(io); 624 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 625 io->io_hdr.io_type = CTL_IO_TASK; 626 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 627 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 628 io->io_hdr.nexus.targ_target.id = 0; 629 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 630 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 631 632 switch (bhstmr->bhstmr_function & ~0x80) { 633 case BHSTMR_FUNCTION_ABORT_TASK: 634#if 0 635 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 636#endif 637 io->taskio.task_action = CTL_TASK_ABORT_TASK; 638 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 639 break; 640 case BHSTMR_FUNCTION_ABORT_TASK_SET: 641#if 0 642 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 643#endif 644 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 645 break; 646 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 647#if 0 648 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 649#endif 650 io->taskio.task_action = CTL_TASK_LUN_RESET; 651 break; 652 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 653#if 0 654 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 655#endif 656 io->taskio.task_action = CTL_TASK_TARGET_RESET; 657 break; 658 default: 659 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 660 bhstmr->bhstmr_function & ~0x80); 661 ctl_free_io(io); 662 663 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 664 if (response == NULL) { 665 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 666 "dropping connection"); 667 icl_pdu_free(request); 668 cfiscsi_session_terminate(cs); 669 return; 670 } 671 bhstmr2 = (struct iscsi_bhs_task_management_response *) 672 response->ip_bhs; 673 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 674 bhstmr2->bhstmr_flags = 0x80; 675 bhstmr2->bhstmr_response = 676 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 677 bhstmr2->bhstmr_initiator_task_tag = 678 bhstmr->bhstmr_initiator_task_tag; 679 icl_pdu_free(request); 680 cfiscsi_pdu_queue(response); 681 return; 682 } 683 684 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 685 error = ctl_queue(io); 686 if (error != CTL_RETVAL_COMPLETE) { 687 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 688 "dropping connection", error); 689 ctl_free_io(io); 690 refcount_release(&cs->cs_outstanding_ctl_pdus); 691 icl_pdu_free(request); 692 cfiscsi_session_terminate(cs); 693 } 694} 695 696static bool 697cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 698{ 699 struct iscsi_bhs_data_out *bhsdo; 700 struct cfiscsi_session *cs; 701 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 702 size_t copy_len, len, off, buffer_offset; 703 int ctl_sg_count; 704 union ctl_io *io; 705 706 cs = PDU_SESSION(request); 707 708 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 709 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 710 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 711 ISCSI_BHS_OPCODE_SCSI_COMMAND, 712 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 713 714 /* 715 * We're only using fields common for Data-Out and SCSI Command PDUs. 716 */ 717 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 718 719 io = cdw->cdw_ctl_io; 720 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 721 ("CTL_FLAG_DATA_IN")); 722 723#if 0 724 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 725 request->ip_data_len, io->scsiio.kern_total_len); 726#endif 727 728 if (io->scsiio.kern_sg_entries > 0) { 729 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 730 ctl_sg_count = io->scsiio.kern_sg_entries; 731 } else { 732 ctl_sglist = &ctl_sg_entry; 733 ctl_sglist->addr = io->scsiio.kern_data_ptr; 734 ctl_sglist->len = io->scsiio.kern_data_len; 735 ctl_sg_count = 1; 736 } 737 738 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 739 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 740 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 741 else 742 buffer_offset = 0; 743 len = icl_pdu_data_segment_length(request); 744 745 /* 746 * Make sure the offset, as sent by the initiator, matches the offset 747 * we're supposed to be at in the scatter-gather list. 748 */ 749 if (buffer_offset > 750 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 751 buffer_offset + len <= 752 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 753 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 754 "expected %zd; dropping connection", buffer_offset, 755 (size_t)io->scsiio.kern_rel_offset + 756 (size_t)io->scsiio.ext_data_filled); 757 ctl_set_data_phase_error(&io->scsiio); 758 cfiscsi_session_terminate(cs); 759 return (true); 760 } 761 762 /* 763 * This is the offset within the PDU data segment, as opposed 764 * to buffer_offset, which is the offset within the task (SCSI 765 * command). 766 */ 767 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 768 buffer_offset; 769 770 /* 771 * Iterate over the scatter/gather segments, filling them with data 772 * from the PDU data segment. Note that this can get called multiple 773 * times for one SCSI command; the cdw structure holds state for the 774 * scatter/gather list. 775 */ 776 for (;;) { 777 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 778 ("cdw->cdw_sg_index >= ctl_sg_count")); 779 if (cdw->cdw_sg_len == 0) { 780 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 781 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 782 } 783 KASSERT(off <= len, ("len > off")); 784 copy_len = len - off; 785 if (copy_len > cdw->cdw_sg_len) 786 copy_len = cdw->cdw_sg_len; 787 788 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 789 cdw->cdw_sg_addr += copy_len; 790 cdw->cdw_sg_len -= copy_len; 791 off += copy_len; 792 io->scsiio.ext_data_filled += copy_len; 793 794 if (cdw->cdw_sg_len == 0) { 795 /* 796 * End of current segment. 797 */ 798 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 799 /* 800 * Last segment in scatter/gather list. 801 */ 802 break; 803 } 804 cdw->cdw_sg_index++; 805 } 806 807 if (off == len) { 808 /* 809 * End of PDU payload. 810 */ 811 break; 812 } 813 } 814 815 if (len > off) { 816 /* 817 * In case of unsolicited data, it's possible that the buffer 818 * provided by CTL is smaller than negotiated FirstBurstLength. 819 * Just ignore the superfluous data; will ask for them with R2T 820 * on next call to cfiscsi_datamove(). 821 * 822 * This obviously can only happen with SCSI Command PDU. 823 */ 824 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 825 ISCSI_BHS_OPCODE_SCSI_COMMAND) 826 return (true); 827 828 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 829 "expected %zd; dropping connection", 830 icl_pdu_data_segment_length(request), off); 831 ctl_set_data_phase_error(&io->scsiio); 832 cfiscsi_session_terminate(cs); 833 return (true); 834 } 835 836 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 837 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 838 CFISCSI_SESSION_WARN(cs, "got the final packet without " 839 "the F flag; flags = 0x%x; dropping connection", 840 bhsdo->bhsdo_flags); 841 ctl_set_data_phase_error(&io->scsiio); 842 cfiscsi_session_terminate(cs); 843 return (true); 844 } 845 846 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 847 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 848 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 849 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 850 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 851 "transmitted size was %zd bytes instead of %d; " 852 "dropping connection", 853 (size_t)io->scsiio.ext_data_filled, 854 cdw->cdw_r2t_end); 855 ctl_set_data_phase_error(&io->scsiio); 856 cfiscsi_session_terminate(cs); 857 return (true); 858 } else { 859 /* 860 * For SCSI Command PDU, this just means we need to 861 * solicit more data by sending R2T. 862 */ 863 return (false); 864 } 865 } 866 867 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 868#if 0 869 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 870 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 871#endif 872 873 return (true); 874 } 875 876 return (false); 877} 878 879static void 880cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 881{ 882 struct iscsi_bhs_data_out *bhsdo; 883 struct cfiscsi_session *cs; 884 struct cfiscsi_data_wait *cdw = NULL; 885 union ctl_io *io; 886 bool done; 887 888 cs = PDU_SESSION(request); 889 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 890 891 CFISCSI_SESSION_LOCK(cs); 892 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 893#if 0 894 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 895 "ttt 0x%x, itt 0x%x", 896 bhsdo->bhsdo_target_transfer_tag, 897 bhsdo->bhsdo_initiator_task_tag, 898 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 899#endif 900 if (bhsdo->bhsdo_target_transfer_tag == 901 cdw->cdw_target_transfer_tag) 902 break; 903 } 904 CFISCSI_SESSION_UNLOCK(cs); 905 if (cdw == NULL) { 906 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 907 "0x%x, not found; dropping connection", 908 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 909 icl_pdu_free(request); 910 cfiscsi_session_terminate(cs); 911 return; 912 } 913 914 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 915 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 916 "DataSN %u, while expected %u; dropping connection", 917 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 918 icl_pdu_free(request); 919 cfiscsi_session_terminate(cs); 920 return; 921 } 922 cdw->cdw_datasn++; 923 924 io = cdw->cdw_ctl_io; 925 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 926 ("CTL_FLAG_DATA_IN")); 927 928 done = cfiscsi_handle_data_segment(request, cdw); 929 if (done) { 930 CFISCSI_SESSION_LOCK(cs); 931 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 932 CFISCSI_SESSION_UNLOCK(cs); 933 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 934 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 935 uma_zfree(cfiscsi_data_wait_zone, cdw); 936 if (done) 937 io->scsiio.be_move_done(io); 938 else 939 cfiscsi_datamove_out(io); 940 } 941 942 icl_pdu_free(request); 943} 944 945static void 946cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 947{ 948 struct iscsi_bhs_logout_request *bhslr; 949 struct iscsi_bhs_logout_response *bhslr2; 950 struct icl_pdu *response; 951 struct cfiscsi_session *cs; 952 953 cs = PDU_SESSION(request); 954 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 955 switch (bhslr->bhslr_reason & 0x7f) { 956 case BHSLR_REASON_CLOSE_SESSION: 957 case BHSLR_REASON_CLOSE_CONNECTION: 958 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 959 if (response == NULL) { 960 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 961 icl_pdu_free(request); 962 cfiscsi_session_terminate(cs); 963 return; 964 } 965 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 966 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 967 bhslr2->bhslr_flags = 0x80; 968 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 969 bhslr2->bhslr_initiator_task_tag = 970 bhslr->bhslr_initiator_task_tag; 971 icl_pdu_free(request); 972 cfiscsi_pdu_queue(response); 973 cfiscsi_session_terminate(cs); 974 break; 975 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 976 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 977 if (response == NULL) { 978 CFISCSI_SESSION_WARN(cs, 979 "failed to allocate memory; dropping connection"); 980 icl_pdu_free(request); 981 cfiscsi_session_terminate(cs); 982 return; 983 } 984 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 985 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 986 bhslr2->bhslr_flags = 0x80; 987 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 988 bhslr2->bhslr_initiator_task_tag = 989 bhslr->bhslr_initiator_task_tag; 990 icl_pdu_free(request); 991 cfiscsi_pdu_queue(response); 992 break; 993 default: 994 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 995 bhslr->bhslr_reason); 996 icl_pdu_free(request); 997 cfiscsi_session_terminate(cs); 998 break; 999 } 1000} 1001 1002static void 1003cfiscsi_callout(void *context) 1004{ 1005 struct icl_pdu *cp; 1006 struct iscsi_bhs_nop_in *bhsni; 1007 struct cfiscsi_session *cs; 1008 1009 cs = context; 1010 1011 if (cs->cs_terminating) 1012 return; 1013 1014 callout_schedule(&cs->cs_callout, 1 * hz); 1015 1016 atomic_add_int(&cs->cs_timeout, 1); 1017 1018#ifdef ICL_KERNEL_PROXY 1019 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1020 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1021 CFISCSI_SESSION_WARN(cs, "login timed out after " 1022 "%d seconds; dropping connection", cs->cs_timeout); 1023 cfiscsi_session_terminate(cs); 1024 } 1025 return; 1026 } 1027#endif 1028 1029 if (ping_timeout <= 0) { 1030 /* 1031 * Pings are disabled. Don't send NOP-In in this case; 1032 * user might have disabled pings to work around problems 1033 * with certain initiators that can't properly handle 1034 * NOP-In, such as iPXE. Reset the timeout, to avoid 1035 * triggering reconnection, should the user decide to 1036 * reenable them. 1037 */ 1038 cs->cs_timeout = 0; 1039 return; 1040 } 1041 1042 if (cs->cs_timeout >= ping_timeout) { 1043 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1044 "dropping connection", ping_timeout); 1045 cfiscsi_session_terminate(cs); 1046 return; 1047 } 1048 1049 /* 1050 * If the ping was reset less than one second ago - which means 1051 * that we've received some PDU during the last second - assume 1052 * the traffic flows correctly and don't bother sending a NOP-Out. 1053 * 1054 * (It's 2 - one for one second, and one for incrementing is_timeout 1055 * earlier in this routine.) 1056 */ 1057 if (cs->cs_timeout < 2) 1058 return; 1059 1060 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1061 if (cp == NULL) { 1062 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1063 return; 1064 } 1065 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1066 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1067 bhsni->bhsni_flags = 0x80; 1068 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1069 1070 cfiscsi_pdu_queue(cp); 1071} 1072 1073static void 1074cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1075{ 1076 struct cfiscsi_data_wait *cdw; 1077 union ctl_io *io; 1078 int error, last, wait; 1079 1080 if (cs->cs_target == NULL) 1081 return; /* No target yet, so nothing to do. */ 1082 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1083 ctl_zero_io(io); 1084 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1085 io->io_hdr.io_type = CTL_IO_TASK; 1086 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1087 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1088 io->io_hdr.nexus.targ_target.id = 0; 1089 io->io_hdr.nexus.targ_lun = 0; 1090 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1091 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1092 wait = cs->cs_outstanding_ctl_pdus; 1093 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1094 error = ctl_queue(io); 1095 if (error != CTL_RETVAL_COMPLETE) { 1096 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1097 refcount_release(&cs->cs_outstanding_ctl_pdus); 1098 ctl_free_io(io); 1099 } 1100 1101 CFISCSI_SESSION_LOCK(cs); 1102 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1103 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1104 CFISCSI_SESSION_UNLOCK(cs); 1105 /* 1106 * Set nonzero port status; this prevents backends from 1107 * assuming that the data transfer actually succeeded 1108 * and writing uninitialized data to disk. 1109 */ 1110 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1111 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1112 uma_zfree(cfiscsi_data_wait_zone, cdw); 1113 CFISCSI_SESSION_LOCK(cs); 1114 } 1115 CFISCSI_SESSION_UNLOCK(cs); 1116 1117 /* 1118 * Wait for CTL to terminate all the tasks. 1119 */ 1120 if (wait > 0) 1121 CFISCSI_SESSION_WARN(cs, 1122 "waiting for CTL to terminate %d tasks", wait); 1123 for (;;) { 1124 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1125 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1126 if (last != 0) 1127 break; 1128 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1129 0, "cfiscsi_terminate", hz / 100); 1130 } 1131 if (wait > 0) 1132 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1133} 1134 1135static void 1136cfiscsi_maintenance_thread(void *arg) 1137{ 1138 struct cfiscsi_session *cs; 1139 1140 cs = arg; 1141 1142 for (;;) { 1143 CFISCSI_SESSION_LOCK(cs); 1144 if (cs->cs_terminating == false) 1145 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1146 CFISCSI_SESSION_UNLOCK(cs); 1147 1148 if (cs->cs_terminating) { 1149 1150 /* 1151 * We used to wait up to 30 seconds to deliver queued 1152 * PDUs to the initiator. We also tried hard to deliver 1153 * SCSI Responses for the aborted PDUs. We don't do 1154 * that anymore. We might need to revisit that. 1155 */ 1156 callout_drain(&cs->cs_callout); 1157 icl_conn_close(cs->cs_conn); 1158 1159 /* 1160 * At this point ICL receive thread is no longer 1161 * running; no new tasks can be queued. 1162 */ 1163 cfiscsi_session_terminate_tasks(cs); 1164 cfiscsi_session_delete(cs); 1165 kthread_exit(); 1166 return; 1167 } 1168 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1169 } 1170} 1171 1172static void 1173cfiscsi_session_terminate(struct cfiscsi_session *cs) 1174{ 1175 1176 if (cs->cs_terminating) 1177 return; 1178 cs->cs_terminating = true; 1179 cv_signal(&cs->cs_maintenance_cv); 1180#ifdef ICL_KERNEL_PROXY 1181 cv_signal(&cs->cs_login_cv); 1182#endif 1183} 1184 1185static int 1186cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1187{ 1188 struct cfiscsi_target *ct; 1189 char *name; 1190 int i; 1191 1192 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1193 1194 ct = cs->cs_target; 1195 name = strdup(cs->cs_initiator_id, M_CTL); 1196 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1197 if (i < 0) { 1198 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1199 i); 1200 cs->cs_ctl_initid = -1; 1201 return (1); 1202 } 1203 cs->cs_ctl_initid = i; 1204#if 0 1205 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1206#endif 1207 1208 return (0); 1209} 1210 1211static void 1212cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1213{ 1214 int error; 1215 1216 if (cs->cs_ctl_initid == -1) 1217 return; 1218 1219 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1220 if (error != 0) { 1221 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1222 error); 1223 } 1224 cs->cs_ctl_initid = -1; 1225} 1226 1227static struct cfiscsi_session * 1228cfiscsi_session_new(struct cfiscsi_softc *softc) 1229{ 1230 struct cfiscsi_session *cs; 1231 int error; 1232 1233 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1234 if (cs == NULL) { 1235 CFISCSI_WARN("malloc failed"); 1236 return (NULL); 1237 } 1238 cs->cs_ctl_initid = -1; 1239 1240 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1241 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1242 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1243 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1244#ifdef ICL_KERNEL_PROXY 1245 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1246#endif 1247 1248 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1249 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1250 cs->cs_conn->ic_error = cfiscsi_error_callback; 1251 cs->cs_conn->ic_prv0 = cs; 1252 1253 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1254 if (error != 0) { 1255 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1256 free(cs, M_CFISCSI); 1257 return (NULL); 1258 } 1259 1260 mtx_lock(&softc->lock); 1261 cs->cs_id = ++softc->last_session_id; 1262 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1263 mtx_unlock(&softc->lock); 1264 1265 /* 1266 * Start pinging the initiator. 1267 */ 1268 callout_init(&cs->cs_callout, 1); 1269 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1270 1271 return (cs); 1272} 1273 1274static void 1275cfiscsi_session_delete(struct cfiscsi_session *cs) 1276{ 1277 struct cfiscsi_softc *softc; 1278 1279 softc = &cfiscsi_softc; 1280 1281 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1282 ("destroying session with outstanding CTL pdus")); 1283 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1284 ("destroying session with non-empty queue")); 1285 1286 cfiscsi_session_unregister_initiator(cs); 1287 if (cs->cs_target != NULL) 1288 cfiscsi_target_release(cs->cs_target); 1289 icl_conn_close(cs->cs_conn); 1290 icl_conn_free(cs->cs_conn); 1291 1292 mtx_lock(&softc->lock); 1293 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1294 cv_signal(&softc->sessions_cv); 1295 mtx_unlock(&softc->lock); 1296 1297 free(cs, M_CFISCSI); 1298} 1299 1300int 1301cfiscsi_init(void) 1302{ 1303 struct cfiscsi_softc *softc; 1304 int retval; 1305 1306 softc = &cfiscsi_softc; 1307 retval = 0; 1308 bzero(softc, sizeof(*softc)); 1309 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1310 1311 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1312#ifdef ICL_KERNEL_PROXY 1313 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1314#endif 1315 TAILQ_INIT(&softc->sessions); 1316 TAILQ_INIT(&softc->targets); 1317 1318 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1319 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1320 UMA_ALIGN_PTR, 0); 1321 1322 return (0); 1323} 1324 1325#ifdef ICL_KERNEL_PROXY 1326static void 1327cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1328{ 1329 struct cfiscsi_session *cs; 1330 1331 cs = cfiscsi_session_new(&cfiscsi_softc); 1332 if (cs == NULL) { 1333 CFISCSI_WARN("failed to create session"); 1334 return; 1335 } 1336 1337 icl_conn_handoff_sock(cs->cs_conn, so); 1338 cs->cs_initiator_sa = sa; 1339 cs->cs_portal_id = portal_id; 1340 cs->cs_waiting_for_ctld = true; 1341 cv_signal(&cfiscsi_softc.accept_cv); 1342} 1343#endif 1344 1345static void 1346cfiscsi_online(void *arg) 1347{ 1348 struct cfiscsi_softc *softc; 1349 struct cfiscsi_target *ct; 1350 int online; 1351 1352 ct = (struct cfiscsi_target *)arg; 1353 softc = ct->ct_softc; 1354 1355 mtx_lock(&softc->lock); 1356 if (ct->ct_online) { 1357 mtx_unlock(&softc->lock); 1358 return; 1359 } 1360 ct->ct_online = 1; 1361 online = softc->online++; 1362 mtx_unlock(&softc->lock); 1363 if (online > 0) 1364 return; 1365 1366#ifdef ICL_KERNEL_PROXY 1367 if (softc->listener != NULL) 1368 icl_listen_free(softc->listener); 1369 softc->listener = icl_listen_new(cfiscsi_accept); 1370#endif 1371} 1372 1373static void 1374cfiscsi_offline(void *arg) 1375{ 1376 struct cfiscsi_softc *softc; 1377 struct cfiscsi_target *ct; 1378 struct cfiscsi_session *cs; 1379 int online; 1380 1381 ct = (struct cfiscsi_target *)arg; 1382 softc = ct->ct_softc; 1383 1384 mtx_lock(&softc->lock); 1385 if (!ct->ct_online) { 1386 mtx_unlock(&softc->lock); 1387 return; 1388 } 1389 ct->ct_online = 0; 1390 online = --softc->online; 1391 1392 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1393 if (cs->cs_target == ct) 1394 cfiscsi_session_terminate(cs); 1395 } 1396 do { 1397 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1398 if (cs->cs_target == ct) 1399 break; 1400 } 1401 if (cs != NULL) 1402 cv_wait(&softc->sessions_cv, &softc->lock); 1403 } while (cs != NULL && ct->ct_online == 0); 1404 mtx_unlock(&softc->lock); 1405 if (online > 0) 1406 return; 1407 1408#ifdef ICL_KERNEL_PROXY 1409 icl_listen_free(softc->listener); 1410 softc->listener = NULL; 1411#endif 1412} 1413 1414static int 1415cfiscsi_info(void *arg, struct sbuf *sb) 1416{ 1417 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1418 int retval; 1419 1420 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1421 ct->ct_state); 1422 return (retval); 1423} 1424 1425static void 1426cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1427{ 1428 struct cfiscsi_softc *softc; 1429 struct cfiscsi_session *cs, *cs2; 1430 struct cfiscsi_target *ct; 1431 struct ctl_iscsi_handoff_params *cihp; 1432 int error; 1433 1434 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1435 softc = &cfiscsi_softc; 1436 1437 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1438 cihp->initiator_name, cihp->initiator_addr, 1439 cihp->target_name); 1440 1441 ct = cfiscsi_target_find(softc, cihp->target_name, 1442 cihp->portal_group_tag); 1443 if (ct == NULL) { 1444 ci->status = CTL_ISCSI_ERROR; 1445 snprintf(ci->error_str, sizeof(ci->error_str), 1446 "%s: target not found", __func__); 1447 return; 1448 } 1449 1450#ifdef ICL_KERNEL_PROXY 1451 if (cihp->socket > 0 && cihp->connection_id > 0) { 1452 snprintf(ci->error_str, sizeof(ci->error_str), 1453 "both socket and connection_id set"); 1454 ci->status = CTL_ISCSI_ERROR; 1455 cfiscsi_target_release(ct); 1456 return; 1457 } 1458 if (cihp->socket == 0) { 1459 mtx_lock(&cfiscsi_softc.lock); 1460 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1461 if (cs->cs_id == cihp->connection_id) 1462 break; 1463 } 1464 if (cs == NULL) { 1465 mtx_unlock(&cfiscsi_softc.lock); 1466 snprintf(ci->error_str, sizeof(ci->error_str), 1467 "connection not found"); 1468 ci->status = CTL_ISCSI_ERROR; 1469 cfiscsi_target_release(ct); 1470 return; 1471 } 1472 mtx_unlock(&cfiscsi_softc.lock); 1473 } else { 1474#endif 1475 cs = cfiscsi_session_new(softc); 1476 if (cs == NULL) { 1477 ci->status = CTL_ISCSI_ERROR; 1478 snprintf(ci->error_str, sizeof(ci->error_str), 1479 "%s: cfiscsi_session_new failed", __func__); 1480 cfiscsi_target_release(ct); 1481 return; 1482 } 1483#ifdef ICL_KERNEL_PROXY 1484 } 1485#endif 1486 1487 /* 1488 * First PDU of Full Feature phase has the same CmdSN as the last 1489 * PDU from the Login Phase received from the initiator. Thus, 1490 * the -1 below. 1491 */ 1492 cs->cs_cmdsn = cihp->cmdsn; 1493 cs->cs_statsn = cihp->statsn; 1494 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1495 cs->cs_max_burst_length = cihp->max_burst_length; 1496 cs->cs_immediate_data = !!cihp->immediate_data; 1497 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1498 cs->cs_conn->ic_header_crc32c = true; 1499 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1500 cs->cs_conn->ic_data_crc32c = true; 1501 1502 strlcpy(cs->cs_initiator_name, 1503 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1504 strlcpy(cs->cs_initiator_addr, 1505 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1506 strlcpy(cs->cs_initiator_alias, 1507 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1508 memcpy(cs->cs_initiator_isid, 1509 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1510 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1511 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1512 cihp->initiator_isid[0], cihp->initiator_isid[1], 1513 cihp->initiator_isid[2], cihp->initiator_isid[3], 1514 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1515 1516 mtx_lock(&softc->lock); 1517 if (ct->ct_online == 0) { 1518 mtx_unlock(&softc->lock); 1519 cfiscsi_session_terminate(cs); 1520 cfiscsi_target_release(ct); 1521 ci->status = CTL_ISCSI_ERROR; 1522 snprintf(ci->error_str, sizeof(ci->error_str), 1523 "%s: port offline", __func__); 1524 return; 1525 } 1526 cs->cs_target = ct; 1527 mtx_unlock(&softc->lock); 1528 1529 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1530restart: 1531 if (!cs->cs_terminating) { 1532 mtx_lock(&softc->lock); 1533 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1534 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1535 cs->cs_target == cs2->cs_target && 1536 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1537 cfiscsi_session_terminate(cs2); 1538 mtx_unlock(&softc->lock); 1539 pause("cfiscsi_reinstate", 1); 1540 goto restart; 1541 } 1542 } 1543 mtx_unlock(&softc->lock); 1544 } 1545 1546 /* 1547 * Register initiator with CTL. 1548 */ 1549 cfiscsi_session_register_initiator(cs); 1550 1551#ifdef ICL_KERNEL_PROXY 1552 if (cihp->socket > 0) { 1553#endif 1554 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1555 if (error != 0) { 1556 cfiscsi_session_terminate(cs); 1557 refcount_release(&cs->cs_outstanding_ctl_pdus); 1558 ci->status = CTL_ISCSI_ERROR; 1559 snprintf(ci->error_str, sizeof(ci->error_str), 1560 "%s: icl_conn_handoff failed with error %d", 1561 __func__, error); 1562 return; 1563 } 1564#ifdef ICL_KERNEL_PROXY 1565 } 1566#endif 1567 1568#ifdef ICL_KERNEL_PROXY 1569 cs->cs_login_phase = false; 1570 1571 /* 1572 * First PDU of the Full Feature phase has likely already arrived. 1573 * We have to pick it up and execute properly. 1574 */ 1575 if (cs->cs_login_pdu != NULL) { 1576 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1577 cfiscsi_pdu_handle(cs->cs_login_pdu); 1578 cs->cs_login_pdu = NULL; 1579 } 1580#endif 1581 1582 refcount_release(&cs->cs_outstanding_ctl_pdus); 1583 ci->status = CTL_ISCSI_OK; 1584} 1585 1586static void 1587cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1588{ 1589 struct ctl_iscsi_list_params *cilp; 1590 struct cfiscsi_session *cs; 1591 struct cfiscsi_softc *softc; 1592 struct sbuf *sb; 1593 int error; 1594 1595 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1596 softc = &cfiscsi_softc; 1597 1598 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1599 if (sb == NULL) { 1600 ci->status = CTL_ISCSI_ERROR; 1601 snprintf(ci->error_str, sizeof(ci->error_str), 1602 "Unable to allocate %d bytes for iSCSI session list", 1603 cilp->alloc_len); 1604 return; 1605 } 1606 1607 sbuf_printf(sb, "<ctlislist>\n"); 1608 mtx_lock(&softc->lock); 1609 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1610#ifdef ICL_KERNEL_PROXY 1611 if (cs->cs_target == NULL) 1612 continue; 1613#endif 1614 error = sbuf_printf(sb, "<connection id=\"%d\">" 1615 "<initiator>%s</initiator>" 1616 "<initiator_addr>%s</initiator_addr>" 1617 "<initiator_alias>%s</initiator_alias>" 1618 "<target>%s</target>" 1619 "<target_alias>%s</target_alias>" 1620 "<target_portal_group_tag>%u</target_portal_group_tag>" 1621 "<header_digest>%s</header_digest>" 1622 "<data_digest>%s</data_digest>" 1623 "<max_data_segment_length>%zd</max_data_segment_length>" 1624 "<immediate_data>%d</immediate_data>" 1625 "<iser>%d</iser>" 1626 "</connection>\n", 1627 cs->cs_id, 1628 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1629 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1630 cs->cs_target->ct_tag, 1631 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1632 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1633 cs->cs_max_data_segment_length, 1634 cs->cs_immediate_data, 1635 cs->cs_conn->ic_iser); 1636 if (error != 0) 1637 break; 1638 } 1639 mtx_unlock(&softc->lock); 1640 error = sbuf_printf(sb, "</ctlislist>\n"); 1641 if (error != 0) { 1642 sbuf_delete(sb); 1643 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1644 snprintf(ci->error_str, sizeof(ci->error_str), 1645 "Out of space, %d bytes is too small", cilp->alloc_len); 1646 return; 1647 } 1648 sbuf_finish(sb); 1649 1650 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1651 cilp->fill_len = sbuf_len(sb) + 1; 1652 ci->status = CTL_ISCSI_OK; 1653 sbuf_delete(sb); 1654} 1655 1656static void 1657cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1658{ 1659 struct icl_pdu *response; 1660 struct iscsi_bhs_asynchronous_message *bhsam; 1661 struct ctl_iscsi_terminate_params *citp; 1662 struct cfiscsi_session *cs; 1663 struct cfiscsi_softc *softc; 1664 int found = 0; 1665 1666 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1667 softc = &cfiscsi_softc; 1668 1669 mtx_lock(&softc->lock); 1670 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1671 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1672 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1673 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1674 continue; 1675 1676 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1677 if (response == NULL) { 1678 /* 1679 * Oh well. Just terminate the connection. 1680 */ 1681 } else { 1682 bhsam = (struct iscsi_bhs_asynchronous_message *) 1683 response->ip_bhs; 1684 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1685 bhsam->bhsam_flags = 0x80; 1686 bhsam->bhsam_0xffffffff = 0xffffffff; 1687 bhsam->bhsam_async_event = 1688 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1689 cfiscsi_pdu_queue(response); 1690 } 1691 cfiscsi_session_terminate(cs); 1692 found++; 1693 } 1694 mtx_unlock(&softc->lock); 1695 1696 if (found == 0) { 1697 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1698 snprintf(ci->error_str, sizeof(ci->error_str), 1699 "No matching connections found"); 1700 return; 1701 } 1702 1703 ci->status = CTL_ISCSI_OK; 1704} 1705 1706static void 1707cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1708{ 1709 struct icl_pdu *response; 1710 struct iscsi_bhs_asynchronous_message *bhsam; 1711 struct ctl_iscsi_logout_params *cilp; 1712 struct cfiscsi_session *cs; 1713 struct cfiscsi_softc *softc; 1714 int found = 0; 1715 1716 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1717 softc = &cfiscsi_softc; 1718 1719 mtx_lock(&softc->lock); 1720 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1721 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1722 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1723 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1724 continue; 1725 1726 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1727 if (response == NULL) { 1728 ci->status = CTL_ISCSI_ERROR; 1729 snprintf(ci->error_str, sizeof(ci->error_str), 1730 "Unable to allocate memory"); 1731 mtx_unlock(&softc->lock); 1732 return; 1733 } 1734 bhsam = 1735 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1736 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1737 bhsam->bhsam_flags = 0x80; 1738 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1739 bhsam->bhsam_parameter3 = htons(10); 1740 cfiscsi_pdu_queue(response); 1741 found++; 1742 } 1743 mtx_unlock(&softc->lock); 1744 1745 if (found == 0) { 1746 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1747 snprintf(ci->error_str, sizeof(ci->error_str), 1748 "No matching connections found"); 1749 return; 1750 } 1751 1752 ci->status = CTL_ISCSI_OK; 1753} 1754 1755#ifdef ICL_KERNEL_PROXY 1756static void 1757cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1758{ 1759 struct ctl_iscsi_listen_params *cilp; 1760 struct sockaddr *sa; 1761 int error; 1762 1763 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1764 1765 if (cfiscsi_softc.listener == NULL) { 1766 CFISCSI_DEBUG("no listener"); 1767 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1768 ci->status = CTL_ISCSI_ERROR; 1769 return; 1770 } 1771 1772 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1773 if (error != 0) { 1774 CFISCSI_DEBUG("getsockaddr, error %d", error); 1775 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1776 ci->status = CTL_ISCSI_ERROR; 1777 return; 1778 } 1779 1780 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1781 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1782 if (error != 0) { 1783 free(sa, M_SONAME); 1784 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1785 snprintf(ci->error_str, sizeof(ci->error_str), 1786 "icl_listen_add failed, error %d", error); 1787 ci->status = CTL_ISCSI_ERROR; 1788 return; 1789 } 1790 1791 ci->status = CTL_ISCSI_OK; 1792} 1793 1794static void 1795cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1796{ 1797 struct ctl_iscsi_accept_params *ciap; 1798 struct cfiscsi_session *cs; 1799 int error; 1800 1801 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1802 1803 mtx_lock(&cfiscsi_softc.lock); 1804 for (;;) { 1805 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1806 if (cs->cs_waiting_for_ctld) 1807 break; 1808 } 1809 if (cs != NULL) 1810 break; 1811 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1812 if (error != 0) { 1813 mtx_unlock(&cfiscsi_softc.lock); 1814 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1815 ci->status = CTL_ISCSI_ERROR; 1816 return; 1817 } 1818 } 1819 mtx_unlock(&cfiscsi_softc.lock); 1820 1821 cs->cs_waiting_for_ctld = false; 1822 cs->cs_login_phase = true; 1823 1824 ciap->connection_id = cs->cs_id; 1825 ciap->portal_id = cs->cs_portal_id; 1826 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1827 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1828 cs->cs_initiator_sa->sa_len); 1829 if (error != 0) { 1830 snprintf(ci->error_str, sizeof(ci->error_str), 1831 "copyout failed with error %d", error); 1832 ci->status = CTL_ISCSI_ERROR; 1833 return; 1834 } 1835 1836 ci->status = CTL_ISCSI_OK; 1837} 1838 1839static void 1840cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1841{ 1842 struct ctl_iscsi_send_params *cisp; 1843 struct cfiscsi_session *cs; 1844 struct icl_pdu *ip; 1845 size_t datalen; 1846 void *data; 1847 int error; 1848 1849 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1850 1851 mtx_lock(&cfiscsi_softc.lock); 1852 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1853 if (cs->cs_id == cisp->connection_id) 1854 break; 1855 } 1856 if (cs == NULL) { 1857 mtx_unlock(&cfiscsi_softc.lock); 1858 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1859 ci->status = CTL_ISCSI_ERROR; 1860 return; 1861 } 1862 mtx_unlock(&cfiscsi_softc.lock); 1863 1864#if 0 1865 if (cs->cs_login_phase == false) 1866 return (EBUSY); 1867#endif 1868 1869 if (cs->cs_terminating) { 1870 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1871 ci->status = CTL_ISCSI_ERROR; 1872 return; 1873 } 1874 1875 datalen = cisp->data_segment_len; 1876 /* 1877 * XXX 1878 */ 1879 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1880 if (datalen > 65535) { 1881 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1882 ci->status = CTL_ISCSI_ERROR; 1883 return; 1884 } 1885 if (datalen > 0) { 1886 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1887 error = copyin(cisp->data_segment, data, datalen); 1888 if (error != 0) { 1889 free(data, M_CFISCSI); 1890 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1891 ci->status = CTL_ISCSI_ERROR; 1892 return; 1893 } 1894 } 1895 1896 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1897 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1898 if (datalen > 0) { 1899 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1900 free(data, M_CFISCSI); 1901 } 1902 CFISCSI_SESSION_LOCK(cs); 1903 icl_pdu_queue(ip); 1904 CFISCSI_SESSION_UNLOCK(cs); 1905 ci->status = CTL_ISCSI_OK; 1906} 1907 1908static void 1909cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1910{ 1911 struct ctl_iscsi_receive_params *cirp; 1912 struct cfiscsi_session *cs; 1913 struct icl_pdu *ip; 1914 void *data; 1915 int error; 1916 1917 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1918 1919 mtx_lock(&cfiscsi_softc.lock); 1920 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1921 if (cs->cs_id == cirp->connection_id) 1922 break; 1923 } 1924 if (cs == NULL) { 1925 mtx_unlock(&cfiscsi_softc.lock); 1926 snprintf(ci->error_str, sizeof(ci->error_str), 1927 "connection not found"); 1928 ci->status = CTL_ISCSI_ERROR; 1929 return; 1930 } 1931 mtx_unlock(&cfiscsi_softc.lock); 1932 1933#if 0 1934 if (is->is_login_phase == false) 1935 return (EBUSY); 1936#endif 1937 1938 CFISCSI_SESSION_LOCK(cs); 1939 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1940 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1941 if (error != 0) { 1942 CFISCSI_SESSION_UNLOCK(cs); 1943 snprintf(ci->error_str, sizeof(ci->error_str), 1944 "interrupted by signal"); 1945 ci->status = CTL_ISCSI_ERROR; 1946 return; 1947 } 1948 } 1949 1950 if (cs->cs_terminating) { 1951 CFISCSI_SESSION_UNLOCK(cs); 1952 snprintf(ci->error_str, sizeof(ci->error_str), 1953 "connection terminating"); 1954 ci->status = CTL_ISCSI_ERROR; 1955 return; 1956 } 1957 ip = cs->cs_login_pdu; 1958 cs->cs_login_pdu = NULL; 1959 CFISCSI_SESSION_UNLOCK(cs); 1960 1961 if (ip->ip_data_len > cirp->data_segment_len) { 1962 icl_pdu_free(ip); 1963 snprintf(ci->error_str, sizeof(ci->error_str), 1964 "data segment too big"); 1965 ci->status = CTL_ISCSI_ERROR; 1966 return; 1967 } 1968 1969 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1970 if (ip->ip_data_len > 0) { 1971 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1972 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1973 copyout(data, cirp->data_segment, ip->ip_data_len); 1974 free(data, M_CFISCSI); 1975 } 1976 1977 icl_pdu_free(ip); 1978 ci->status = CTL_ISCSI_OK; 1979} 1980 1981#endif /* !ICL_KERNEL_PROXY */ 1982 1983static void 1984cfiscsi_ioctl_port_create(struct ctl_req *req) 1985{ 1986 struct cfiscsi_target *ct; 1987 struct ctl_port *port; 1988 const char *target, *alias, *tags; 1989 struct scsi_vpd_id_descriptor *desc; 1990 ctl_options_t opts; 1991 int retval, len, idlen; 1992 uint16_t tag; 1993 1994 ctl_init_opts(&opts, req->num_args, req->kern_args); 1995 target = ctl_get_opt(&opts, "cfiscsi_target"); 1996 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1997 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1998 if (target == NULL || tags == NULL) { 1999 req->status = CTL_LUN_ERROR; 2000 snprintf(req->error_str, sizeof(req->error_str), 2001 "Missing required argument"); 2002 ctl_free_opts(&opts); 2003 return; 2004 } 2005 tag = strtol(tags, (char **)NULL, 10); 2006 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2007 if (ct == NULL) { 2008 req->status = CTL_LUN_ERROR; 2009 snprintf(req->error_str, sizeof(req->error_str), 2010 "failed to create target \"%s\"", target); 2011 ctl_free_opts(&opts); 2012 return; 2013 } 2014 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2015 req->status = CTL_LUN_ERROR; 2016 snprintf(req->error_str, sizeof(req->error_str), 2017 "target \"%s\" already exists", target); 2018 cfiscsi_target_release(ct); 2019 ctl_free_opts(&opts); 2020 return; 2021 } 2022 port = &ct->ct_port; 2023 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2024 goto done; 2025 2026 port->frontend = &cfiscsi_frontend; 2027 port->port_type = CTL_PORT_ISCSI; 2028 /* XXX KDM what should the real number be here? */ 2029 port->num_requested_ctl_io = 4096; 2030 port->port_name = "iscsi"; 2031 port->physical_port = tag; 2032 port->virtual_port = ct->ct_target_id; 2033 port->port_online = cfiscsi_online; 2034 port->port_offline = cfiscsi_offline; 2035 port->port_info = cfiscsi_info; 2036 port->onoff_arg = ct; 2037 port->lun_enable = cfiscsi_lun_enable; 2038 port->lun_disable = cfiscsi_lun_disable; 2039 port->targ_lun_arg = ct; 2040 port->fe_datamove = cfiscsi_datamove; 2041 port->fe_done = cfiscsi_done; 2042 2043 /* XXX KDM what should we report here? */ 2044 /* XXX These should probably be fetched from CTL. */ 2045 port->max_targets = 1; 2046 port->max_target_id = 15; 2047 2048 port->options = opts; 2049 STAILQ_INIT(&opts); 2050 2051 /* Generate Port ID. */ 2052 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2053 idlen = roundup2(idlen, 4); 2054 len = sizeof(struct scsi_vpd_device_id) + idlen; 2055 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2056 M_CTL, M_WAITOK | M_ZERO); 2057 port->port_devid->len = len; 2058 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2059 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2060 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2061 SVPD_ID_TYPE_SCSI_NAME; 2062 desc->length = idlen; 2063 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2064 2065 /* Generate Target ID. */ 2066 idlen = strlen(target) + 1; 2067 idlen = roundup2(idlen, 4); 2068 len = sizeof(struct scsi_vpd_device_id) + idlen; 2069 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2070 M_CTL, M_WAITOK | M_ZERO); 2071 port->target_devid->len = len; 2072 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2073 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2074 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2075 SVPD_ID_TYPE_SCSI_NAME; 2076 desc->length = idlen; 2077 strlcpy(desc->identifier, target, idlen); 2078 2079 retval = ctl_port_register(port); 2080 if (retval != 0) { 2081 ctl_free_opts(&port->options); 2082 cfiscsi_target_release(ct); 2083 free(port->port_devid, M_CFISCSI); 2084 free(port->target_devid, M_CFISCSI); 2085 req->status = CTL_LUN_ERROR; 2086 snprintf(req->error_str, sizeof(req->error_str), 2087 "ctl_port_register() failed with error %d", retval); 2088 return; 2089 } 2090done: 2091 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2092 req->status = CTL_LUN_OK; 2093 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2094 sizeof(port->targ_port)); //XXX 2095} 2096 2097static void 2098cfiscsi_ioctl_port_remove(struct ctl_req *req) 2099{ 2100 struct cfiscsi_target *ct; 2101 const char *target, *tags; 2102 ctl_options_t opts; 2103 uint16_t tag; 2104 2105 ctl_init_opts(&opts, req->num_args, req->kern_args); 2106 target = ctl_get_opt(&opts, "cfiscsi_target"); 2107 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2108 if (target == NULL || tags == NULL) { 2109 ctl_free_opts(&opts); 2110 req->status = CTL_LUN_ERROR; 2111 snprintf(req->error_str, sizeof(req->error_str), 2112 "Missing required argument"); 2113 return; 2114 } 2115 tag = strtol(tags, (char **)NULL, 10); 2116 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2117 if (ct == NULL) { 2118 ctl_free_opts(&opts); 2119 req->status = CTL_LUN_ERROR; 2120 snprintf(req->error_str, sizeof(req->error_str), 2121 "can't find target \"%s\"", target); 2122 return; 2123 } 2124 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2125 ctl_free_opts(&opts); 2126 req->status = CTL_LUN_ERROR; 2127 snprintf(req->error_str, sizeof(req->error_str), 2128 "target \"%s\" is already dying", target); 2129 return; 2130 } 2131 ctl_free_opts(&opts); 2132 2133 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2134 ctl_port_offline(&ct->ct_port); 2135 cfiscsi_target_release(ct); 2136 cfiscsi_target_release(ct); 2137 req->status = CTL_LUN_OK; 2138} 2139 2140static int 2141cfiscsi_ioctl(struct cdev *dev, 2142 u_long cmd, caddr_t addr, int flag, struct thread *td) 2143{ 2144 struct ctl_iscsi *ci; 2145 struct ctl_req *req; 2146 2147 if (cmd == CTL_PORT_REQ) { 2148 req = (struct ctl_req *)addr; 2149 switch (req->reqtype) { 2150 case CTL_REQ_CREATE: 2151 cfiscsi_ioctl_port_create(req); 2152 break; 2153 case CTL_REQ_REMOVE: 2154 cfiscsi_ioctl_port_remove(req); 2155 break; 2156 default: 2157 req->status = CTL_LUN_ERROR; 2158 snprintf(req->error_str, sizeof(req->error_str), 2159 "Unsupported request type %d", req->reqtype); 2160 } 2161 return (0); 2162 } 2163 2164 if (cmd != CTL_ISCSI) 2165 return (ENOTTY); 2166 2167 ci = (struct ctl_iscsi *)addr; 2168 switch (ci->type) { 2169 case CTL_ISCSI_HANDOFF: 2170 cfiscsi_ioctl_handoff(ci); 2171 break; 2172 case CTL_ISCSI_LIST: 2173 cfiscsi_ioctl_list(ci); 2174 break; 2175 case CTL_ISCSI_TERMINATE: 2176 cfiscsi_ioctl_terminate(ci); 2177 break; 2178 case CTL_ISCSI_LOGOUT: 2179 cfiscsi_ioctl_logout(ci); 2180 break; 2181#ifdef ICL_KERNEL_PROXY 2182 case CTL_ISCSI_LISTEN: 2183 cfiscsi_ioctl_listen(ci); 2184 break; 2185 case CTL_ISCSI_ACCEPT: 2186 cfiscsi_ioctl_accept(ci); 2187 break; 2188 case CTL_ISCSI_SEND: 2189 cfiscsi_ioctl_send(ci); 2190 break; 2191 case CTL_ISCSI_RECEIVE: 2192 cfiscsi_ioctl_receive(ci); 2193 break; 2194#else 2195 case CTL_ISCSI_LISTEN: 2196 case CTL_ISCSI_ACCEPT: 2197 case CTL_ISCSI_SEND: 2198 case CTL_ISCSI_RECEIVE: 2199 ci->status = CTL_ISCSI_ERROR; 2200 snprintf(ci->error_str, sizeof(ci->error_str), 2201 "%s: CTL compiled without ICL_KERNEL_PROXY", 2202 __func__); 2203 break; 2204#endif /* !ICL_KERNEL_PROXY */ 2205 default: 2206 ci->status = CTL_ISCSI_ERROR; 2207 snprintf(ci->error_str, sizeof(ci->error_str), 2208 "%s: invalid iSCSI request type %d", __func__, ci->type); 2209 break; 2210 } 2211 2212 return (0); 2213} 2214 2215static void 2216cfiscsi_target_hold(struct cfiscsi_target *ct) 2217{ 2218 2219 refcount_acquire(&ct->ct_refcount); 2220} 2221 2222static void 2223cfiscsi_target_release(struct cfiscsi_target *ct) 2224{ 2225 struct cfiscsi_softc *softc; 2226 2227 softc = ct->ct_softc; 2228 mtx_lock(&softc->lock); 2229 if (refcount_release(&ct->ct_refcount)) { 2230 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2231 mtx_unlock(&softc->lock); 2232 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2233 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2234 if (ctl_port_deregister(&ct->ct_port) != 0) 2235 printf("%s: ctl_port_deregister() failed\n", 2236 __func__); 2237 } 2238 free(ct, M_CFISCSI); 2239 2240 return; 2241 } 2242 mtx_unlock(&softc->lock); 2243} 2244 2245static struct cfiscsi_target * 2246cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2247{ 2248 struct cfiscsi_target *ct; 2249 2250 mtx_lock(&softc->lock); 2251 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2252 if (ct->ct_tag != tag || 2253 strcmp(name, ct->ct_name) != 0 || 2254 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2255 continue; 2256 cfiscsi_target_hold(ct); 2257 mtx_unlock(&softc->lock); 2258 return (ct); 2259 } 2260 mtx_unlock(&softc->lock); 2261 2262 return (NULL); 2263} 2264 2265static struct cfiscsi_target * 2266cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2267 const char *alias, uint16_t tag) 2268{ 2269 struct cfiscsi_target *ct, *newct; 2270 2271 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2272 return (NULL); 2273 2274 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2275 2276 mtx_lock(&softc->lock); 2277 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2278 if (ct->ct_tag != tag || 2279 strcmp(name, ct->ct_name) != 0 || 2280 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2281 continue; 2282 cfiscsi_target_hold(ct); 2283 mtx_unlock(&softc->lock); 2284 free(newct, M_CFISCSI); 2285 return (ct); 2286 } 2287 2288 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2289 if (alias != NULL) 2290 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2291 newct->ct_tag = tag; 2292 refcount_init(&newct->ct_refcount, 1); 2293 newct->ct_softc = softc; 2294 if (TAILQ_EMPTY(&softc->targets)) 2295 softc->last_target_id = 0; 2296 newct->ct_target_id = ++softc->last_target_id; 2297 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2298 mtx_unlock(&softc->lock); 2299 2300 return (newct); 2301} 2302 2303static int 2304cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2305{ 2306 2307 return (0); 2308} 2309 2310static int 2311cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2312{ 2313 2314 return (0); 2315} 2316 2317static void 2318cfiscsi_datamove_in(union ctl_io *io) 2319{ 2320 struct cfiscsi_session *cs; 2321 struct icl_pdu *request, *response; 2322 const struct iscsi_bhs_scsi_command *bhssc; 2323 struct iscsi_bhs_data_in *bhsdi; 2324 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2325 size_t len, expected_len, sg_len, buffer_offset; 2326 const char *sg_addr; 2327 int ctl_sg_count, error, i; 2328 2329 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2330 cs = PDU_SESSION(request); 2331 2332 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2333 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2334 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2335 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2336 2337 if (io->scsiio.kern_sg_entries > 0) { 2338 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2339 ctl_sg_count = io->scsiio.kern_sg_entries; 2340 } else { 2341 ctl_sglist = &ctl_sg_entry; 2342 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2343 ctl_sglist->len = io->scsiio.kern_data_len; 2344 ctl_sg_count = 1; 2345 } 2346 2347 /* 2348 * This is the total amount of data to be transferred within the current 2349 * SCSI command. We need to record it so that we can properly report 2350 * underflow/underflow. 2351 */ 2352 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2353 2354 /* 2355 * This is the offset within the current SCSI command; for the first 2356 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2357 * it will be the sum of lengths of previous ones. 2358 */ 2359 buffer_offset = io->scsiio.kern_rel_offset; 2360 2361 /* 2362 * This is the transfer length expected by the initiator. In theory, 2363 * it could be different from the correct amount of data from the SCSI 2364 * point of view, even if that doesn't make any sense. 2365 */ 2366 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2367#if 0 2368 if (expected_len != io->scsiio.kern_total_len) { 2369 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2370 "actual length %zd", expected_len, 2371 (size_t)io->scsiio.kern_total_len); 2372 } 2373#endif 2374 2375 if (buffer_offset >= expected_len) { 2376#if 0 2377 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2378 "already sent the expected len", buffer_offset); 2379#endif 2380 io->scsiio.be_move_done(io); 2381 return; 2382 } 2383 2384 i = 0; 2385 sg_addr = NULL; 2386 sg_len = 0; 2387 response = NULL; 2388 bhsdi = NULL; 2389 for (;;) { 2390 if (response == NULL) { 2391 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2392 if (response == NULL) { 2393 CFISCSI_SESSION_WARN(cs, "failed to " 2394 "allocate memory; dropping connection"); 2395 ctl_set_busy(&io->scsiio); 2396 io->scsiio.be_move_done(io); 2397 cfiscsi_session_terminate(cs); 2398 return; 2399 } 2400 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2401 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2402 bhsdi->bhsdi_initiator_task_tag = 2403 bhssc->bhssc_initiator_task_tag; 2404 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2405 PDU_EXPDATASN(request)++; 2406 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2407 } 2408 2409 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2410 if (sg_len == 0) { 2411 sg_addr = ctl_sglist[i].addr; 2412 sg_len = ctl_sglist[i].len; 2413 KASSERT(sg_len > 0, ("sg_len <= 0")); 2414 } 2415 2416 len = sg_len; 2417 2418 /* 2419 * Truncate to maximum data segment length. 2420 */ 2421 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2422 ("ip_data_len %zd >= max_data_segment_length %zd", 2423 response->ip_data_len, cs->cs_max_data_segment_length)); 2424 if (response->ip_data_len + len > 2425 cs->cs_max_data_segment_length) { 2426 len = cs->cs_max_data_segment_length - 2427 response->ip_data_len; 2428 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2429 len, sg_len)); 2430 } 2431 2432 /* 2433 * Truncate to expected data transfer length. 2434 */ 2435 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2436 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2437 buffer_offset, response->ip_data_len, expected_len)); 2438 if (buffer_offset + response->ip_data_len + len > expected_len) { 2439 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2440 "to expected data transfer length %zd", 2441 buffer_offset + response->ip_data_len + len, expected_len); 2442 len = expected_len - (buffer_offset + response->ip_data_len); 2443 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2444 len, sg_len)); 2445 } 2446 2447 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2448 if (error != 0) { 2449 CFISCSI_SESSION_WARN(cs, "failed to " 2450 "allocate memory; dropping connection"); 2451 icl_pdu_free(response); 2452 ctl_set_busy(&io->scsiio); 2453 io->scsiio.be_move_done(io); 2454 cfiscsi_session_terminate(cs); 2455 return; 2456 } 2457 sg_addr += len; 2458 sg_len -= len; 2459 2460 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2461 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2462 buffer_offset, response->ip_data_len, expected_len)); 2463 if (buffer_offset + response->ip_data_len == expected_len) { 2464 /* 2465 * Already have the amount of data the initiator wanted. 2466 */ 2467 break; 2468 } 2469 2470 if (sg_len == 0) { 2471 /* 2472 * End of scatter-gather segment; 2473 * proceed to the next one... 2474 */ 2475 if (i == ctl_sg_count - 1) { 2476 /* 2477 * ... unless this was the last one. 2478 */ 2479 break; 2480 } 2481 i++; 2482 } 2483 2484 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2485 /* 2486 * Can't stuff more data into the current PDU; 2487 * queue it. Note that's not enough to check 2488 * for kern_data_resid == 0 instead; there 2489 * may be several Data-In PDUs for the final 2490 * call to cfiscsi_datamove(), and we want 2491 * to set the F flag only on the last of them. 2492 */ 2493 buffer_offset += response->ip_data_len; 2494 if (buffer_offset == io->scsiio.kern_total_len || 2495 buffer_offset == expected_len) { 2496 buffer_offset -= response->ip_data_len; 2497 break; 2498 } 2499 cfiscsi_pdu_queue(response); 2500 response = NULL; 2501 bhsdi = NULL; 2502 } 2503 } 2504 if (response != NULL) { 2505 buffer_offset += response->ip_data_len; 2506 if (buffer_offset == io->scsiio.kern_total_len || 2507 buffer_offset == expected_len) { 2508 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2509 if (io->io_hdr.status == CTL_SUCCESS) { 2510 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2511 if (PDU_TOTAL_TRANSFER_LEN(request) < 2512 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2513 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2514 bhsdi->bhsdi_residual_count = 2515 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2516 PDU_TOTAL_TRANSFER_LEN(request)); 2517 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2518 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2519 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2520 bhsdi->bhsdi_residual_count = 2521 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2522 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2523 } 2524 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2525 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2526 } 2527 } 2528 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2529 cfiscsi_pdu_queue(response); 2530 } 2531 2532 io->scsiio.be_move_done(io); 2533} 2534 2535static void 2536cfiscsi_datamove_out(union ctl_io *io) 2537{ 2538 struct cfiscsi_session *cs; 2539 struct icl_pdu *request, *response; 2540 const struct iscsi_bhs_scsi_command *bhssc; 2541 struct iscsi_bhs_r2t *bhsr2t; 2542 struct cfiscsi_data_wait *cdw; 2543 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2544 uint32_t expected_len, r2t_off, r2t_len; 2545 uint32_t target_transfer_tag; 2546 bool done; 2547 2548 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2549 cs = PDU_SESSION(request); 2550 2551 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2552 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2553 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2554 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2555 2556 /* 2557 * We need to record it so that we can properly report 2558 * underflow/underflow. 2559 */ 2560 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2561 2562 /* 2563 * Report write underflow as error since CTL and backends don't 2564 * really support it, and SCSI does not tell how to do it right. 2565 */ 2566 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2567 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2568 expected_len) { 2569 io->scsiio.io_hdr.port_status = 43; 2570 io->scsiio.be_move_done(io); 2571 return; 2572 } 2573 2574 target_transfer_tag = 2575 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2576 2577#if 0 2578 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2579 "task tag 0x%x, target transfer tag 0x%x", 2580 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2581#endif 2582 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2583 if (cdw == NULL) { 2584 CFISCSI_SESSION_WARN(cs, "failed to " 2585 "allocate memory; dropping connection"); 2586 ctl_set_busy(&io->scsiio); 2587 io->scsiio.be_move_done(io); 2588 cfiscsi_session_terminate(cs); 2589 return; 2590 } 2591 cdw->cdw_ctl_io = io; 2592 cdw->cdw_target_transfer_tag = target_transfer_tag; 2593 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2594 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2595 cdw->cdw_datasn = 0; 2596 2597 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2598 if (io->scsiio.kern_sg_entries > 0) { 2599 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2600 } else { 2601 ctl_sglist = &ctl_sg_entry; 2602 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2603 ctl_sglist->len = io->scsiio.kern_data_len; 2604 } 2605 cdw->cdw_sg_index = 0; 2606 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2607 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2608 r2t_off = io->scsiio.ext_data_filled; 2609 while (r2t_off > 0) { 2610 if (r2t_off >= cdw->cdw_sg_len) { 2611 r2t_off -= cdw->cdw_sg_len; 2612 cdw->cdw_sg_index++; 2613 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2614 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2615 continue; 2616 } 2617 cdw->cdw_sg_addr += r2t_off; 2618 cdw->cdw_sg_len -= r2t_off; 2619 r2t_off = 0; 2620 } 2621 2622 if (cs->cs_immediate_data && 2623 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2624 icl_pdu_data_segment_length(request)) { 2625 done = cfiscsi_handle_data_segment(request, cdw); 2626 if (done) { 2627 uma_zfree(cfiscsi_data_wait_zone, cdw); 2628 io->scsiio.be_move_done(io); 2629 return; 2630 } 2631 } 2632 2633 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2634 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2635 cs->cs_max_burst_length); 2636 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2637 2638 CFISCSI_SESSION_LOCK(cs); 2639 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2640 CFISCSI_SESSION_UNLOCK(cs); 2641 2642 /* 2643 * XXX: We should limit the number of outstanding R2T PDUs 2644 * per task to MaxOutstandingR2T. 2645 */ 2646 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2647 if (response == NULL) { 2648 CFISCSI_SESSION_WARN(cs, "failed to " 2649 "allocate memory; dropping connection"); 2650 ctl_set_busy(&io->scsiio); 2651 io->scsiio.be_move_done(io); 2652 cfiscsi_session_terminate(cs); 2653 return; 2654 } 2655 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2656 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2657 bhsr2t->bhsr2t_flags = 0x80; 2658 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2659 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2660 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2661 /* 2662 * XXX: Here we assume that cfiscsi_datamove() won't ever 2663 * be running concurrently on several CPUs for a given 2664 * command. 2665 */ 2666 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2667 PDU_R2TSN(request)++; 2668 /* 2669 * This is the offset within the current SCSI command; 2670 * i.e. for the first call of datamove(), it will be 0, 2671 * and for subsequent ones it will be the sum of lengths 2672 * of previous ones. 2673 * 2674 * The ext_data_filled is to account for unsolicited 2675 * (immediate) data that might have already arrived. 2676 */ 2677 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2678 /* 2679 * This is the total length (sum of S/G lengths) this call 2680 * to cfiscsi_datamove() is supposed to handle, limited by 2681 * MaxBurstLength. 2682 */ 2683 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2684 cfiscsi_pdu_queue(response); 2685} 2686 2687static void 2688cfiscsi_datamove(union ctl_io *io) 2689{ 2690 2691 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2692 cfiscsi_datamove_in(io); 2693 else { 2694 /* We hadn't received anything during this datamove yet. */ 2695 io->scsiio.ext_data_filled = 0; 2696 cfiscsi_datamove_out(io); 2697 } 2698} 2699 2700static void 2701cfiscsi_scsi_command_done(union ctl_io *io) 2702{ 2703 struct icl_pdu *request, *response; 2704 struct iscsi_bhs_scsi_command *bhssc; 2705 struct iscsi_bhs_scsi_response *bhssr; 2706#ifdef DIAGNOSTIC 2707 struct cfiscsi_data_wait *cdw; 2708#endif 2709 struct cfiscsi_session *cs; 2710 uint16_t sense_length; 2711 2712 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2713 cs = PDU_SESSION(request); 2714 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2715 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2716 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2717 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2718 2719 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2720 // bhssc->bhssc_initiator_task_tag); 2721 2722#ifdef DIAGNOSTIC 2723 CFISCSI_SESSION_LOCK(cs); 2724 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2725 KASSERT(bhssc->bhssc_initiator_task_tag != 2726 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2727 CFISCSI_SESSION_UNLOCK(cs); 2728#endif 2729 2730 /* 2731 * Do not return status for aborted commands. 2732 * There are exceptions, but none supported by CTL yet. 2733 */ 2734 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2735 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2736 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2737 ctl_free_io(io); 2738 icl_pdu_free(request); 2739 return; 2740 } 2741 2742 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2743 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2744 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2745 bhssr->bhssr_flags = 0x80; 2746 /* 2747 * XXX: We don't deal with bidirectional under/overflows; 2748 * does anything actually support those? 2749 */ 2750 if (PDU_TOTAL_TRANSFER_LEN(request) < 2751 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2752 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2753 bhssr->bhssr_residual_count = 2754 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2755 PDU_TOTAL_TRANSFER_LEN(request)); 2756 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2757 // ntohl(bhssr->bhssr_residual_count)); 2758 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2759 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2760 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2761 bhssr->bhssr_residual_count = 2762 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2763 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2764 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2765 // ntohl(bhssr->bhssr_residual_count)); 2766 } 2767 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2768 bhssr->bhssr_status = io->scsiio.scsi_status; 2769 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2770 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2771 2772 if (io->scsiio.sense_len > 0) { 2773#if 0 2774 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2775 io->scsiio.sense_len); 2776#endif 2777 sense_length = htons(io->scsiio.sense_len); 2778 icl_pdu_append_data(response, 2779 &sense_length, sizeof(sense_length), M_WAITOK); 2780 icl_pdu_append_data(response, 2781 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2782 } 2783 2784 ctl_free_io(io); 2785 icl_pdu_free(request); 2786 cfiscsi_pdu_queue(response); 2787} 2788 2789static void 2790cfiscsi_task_management_done(union ctl_io *io) 2791{ 2792 struct icl_pdu *request, *response; 2793 struct iscsi_bhs_task_management_request *bhstmr; 2794 struct iscsi_bhs_task_management_response *bhstmr2; 2795 struct cfiscsi_data_wait *cdw, *tmpcdw; 2796 struct cfiscsi_session *cs; 2797 2798 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2799 cs = PDU_SESSION(request); 2800 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2801 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2802 ISCSI_BHS_OPCODE_TASK_REQUEST, 2803 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2804 2805#if 0 2806 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2807 bhstmr->bhstmr_initiator_task_tag, 2808 bhstmr->bhstmr_referenced_task_tag); 2809#endif 2810 2811 if ((bhstmr->bhstmr_function & ~0x80) == 2812 BHSTMR_FUNCTION_ABORT_TASK) { 2813 /* 2814 * Make sure we no longer wait for Data-Out for this command. 2815 */ 2816 CFISCSI_SESSION_LOCK(cs); 2817 TAILQ_FOREACH_SAFE(cdw, 2818 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2819 if (bhstmr->bhstmr_referenced_task_tag != 2820 cdw->cdw_initiator_task_tag) 2821 continue; 2822 2823#if 0 2824 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2825 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2826#endif 2827 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2828 cdw, cdw_next); 2829 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2830 uma_zfree(cfiscsi_data_wait_zone, cdw); 2831 } 2832 CFISCSI_SESSION_UNLOCK(cs); 2833 } 2834 2835 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2836 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2837 response->ip_bhs; 2838 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2839 bhstmr2->bhstmr_flags = 0x80; 2840 if (io->io_hdr.status == CTL_SUCCESS) { 2841 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2842 } else { 2843 /* 2844 * XXX: How to figure out what exactly went wrong? iSCSI spec 2845 * expects us to provide detailed error, e.g. "Task does 2846 * not exist" or "LUN does not exist". 2847 */ 2848 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2849 bhstmr2->bhstmr_response = 2850 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2851 } 2852 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2853 2854 ctl_free_io(io); 2855 icl_pdu_free(request); 2856 cfiscsi_pdu_queue(response); 2857} 2858 2859static void 2860cfiscsi_done(union ctl_io *io) 2861{ 2862 struct icl_pdu *request; 2863 struct cfiscsi_session *cs; 2864 2865 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2866 ("invalid CTL status %#x", io->io_hdr.status)); 2867 2868 if (io->io_hdr.io_type == CTL_IO_TASK && 2869 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2870 /* 2871 * Implicit task termination has just completed; nothing to do. 2872 */ 2873 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2874 cs->cs_tasks_aborted = true; 2875 refcount_release(&cs->cs_outstanding_ctl_pdus); 2876 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2877 ctl_free_io(io); 2878 return; 2879 } 2880 2881 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2882 cs = PDU_SESSION(request); 2883 refcount_release(&cs->cs_outstanding_ctl_pdus); 2884 2885 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2886 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2887 cfiscsi_scsi_command_done(io); 2888 break; 2889 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2890 cfiscsi_task_management_done(io); 2891 break; 2892 default: 2893 panic("cfiscsi_done called with wrong opcode 0x%x", 2894 request->ip_bhs->bhs_opcode); 2895 } 2896} 2897