ctl_frontend_iscsi.c revision 300044
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 300044 2016-05-17 11:10:44Z 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 300044 2016-05-17 11:10:44Z trasz $"); 38 39#include <sys/param.h> 40#include <sys/capsicum.h> 41#include <sys/condvar.h> 42#include <sys/endian.h> 43#include <sys/file.h> 44#include <sys/kernel.h> 45#include <sys/kthread.h> 46#include <sys/lock.h> 47#include <sys/malloc.h> 48#include <sys/module.h> 49#include <sys/mutex.h> 50#include <sys/queue.h> 51#include <sys/sbuf.h> 52#include <sys/socket.h> 53#include <sys/sysctl.h> 54#include <sys/systm.h> 55#include <sys/uio.h> 56#include <sys/unistd.h> 57#include <vm/uma.h> 58 59#include <cam/scsi/scsi_all.h> 60#include <cam/scsi/scsi_da.h> 61#include <cam/ctl/ctl_io.h> 62#include <cam/ctl/ctl.h> 63#include <cam/ctl/ctl_backend.h> 64#include <cam/ctl/ctl_error.h> 65#include <cam/ctl/ctl_frontend.h> 66#include <cam/ctl/ctl_debug.h> 67#include <cam/ctl/ctl_ha.h> 68#include <cam/ctl/ctl_ioctl.h> 69#include <cam/ctl/ctl_private.h> 70 71#include <dev/iscsi/icl.h> 72#include <dev/iscsi/icl_wrappers.h> 73#include <dev/iscsi/iscsi_proto.h> 74#include <cam/ctl/ctl_frontend_iscsi.h> 75 76#ifdef ICL_KERNEL_PROXY 77#include <sys/socketvar.h> 78#endif 79 80#ifdef ICL_KERNEL_PROXY 81FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 82#endif 83 84static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 85static uma_zone_t cfiscsi_data_wait_zone; 86 87SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 88 "CAM Target Layer iSCSI Frontend"); 89static int debug = 1; 90SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 91 &debug, 1, "Enable debug messages"); 92static int ping_timeout = 5; 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; 96SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 97 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 98static int maxcmdsn_delta = 256; 99SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 100 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 101 "without confirmation"); 102 103#define CFISCSI_DEBUG(X, ...) \ 104 do { \ 105 if (debug > 1) { \ 106 printf("%s: " X "\n", \ 107 __func__, ## __VA_ARGS__); \ 108 } \ 109 } while (0) 110 111#define CFISCSI_WARN(X, ...) \ 112 do { \ 113 if (debug > 0) { \ 114 printf("WARNING: %s: " X "\n", \ 115 __func__, ## __VA_ARGS__); \ 116 } \ 117 } while (0) 118 119#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 120 do { \ 121 if (debug > 1) { \ 122 printf("%s: %s (%s): " X "\n", \ 123 __func__, S->cs_initiator_addr, \ 124 S->cs_initiator_name, ## __VA_ARGS__); \ 125 } \ 126 } while (0) 127 128#define CFISCSI_SESSION_WARN(S, X, ...) \ 129 do { \ 130 if (debug > 0) { \ 131 printf("WARNING: %s (%s): " X "\n", \ 132 S->cs_initiator_addr, \ 133 S->cs_initiator_name, ## __VA_ARGS__); \ 134 } \ 135 } while (0) 136 137#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 138#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 139#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 140 141#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 142#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 143#define PDU_EXPDATASN(X) (X)->ip_prv0 144#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 145#define PDU_R2TSN(X) (X)->ip_prv2 146 147int cfiscsi_init(void); 148static void cfiscsi_online(void *arg); 149static void cfiscsi_offline(void *arg); 150static int cfiscsi_info(void *arg, struct sbuf *sb); 151static int cfiscsi_ioctl(struct cdev *dev, 152 u_long cmd, caddr_t addr, int flag, struct thread *td); 153static void cfiscsi_datamove(union ctl_io *io); 154static void cfiscsi_datamove_in(union ctl_io *io); 155static void cfiscsi_datamove_out(union ctl_io *io); 156static void cfiscsi_done(union ctl_io *io); 157static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 158static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 159static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 160static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 161static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 162static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 163static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 164static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 165 struct cfiscsi_session *cs, union ctl_io *io, 166 uint32_t initiator_task_tag, 167 uint32_t *target_transfer_tagp); 168static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 169 struct cfiscsi_data_wait *cdw); 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; 179 180static struct ctl_frontend cfiscsi_frontend = 181{ 182 .name = "iscsi", 183 .init = cfiscsi_init, 184 .ioctl = cfiscsi_ioctl, 185}; 186CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 187MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 188 189static struct icl_pdu * 190cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 191{ 192 193 return (icl_pdu_new(request->ip_conn, flags)); 194} 195 196static bool 197cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 198{ 199 const struct iscsi_bhs_scsi_command *bhssc; 200 struct cfiscsi_session *cs; 201 uint32_t cmdsn, expstatsn; 202 203 cs = PDU_SESSION(request); 204 205 /* 206 * Every incoming PDU - not just NOP-Out - resets the ping timer. 207 * The purpose of the timeout is to reset the connection when it stalls; 208 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 209 * in some queue. 210 * 211 * XXX: Locking? 212 */ 213 cs->cs_timeout = 0; 214 215 /* 216 * Data-Out PDUs don't contain CmdSN. 217 */ 218 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 219 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 220 return (false); 221 222 /* 223 * We're only using fields common for all the request 224 * (initiator -> target) PDUs. 225 */ 226 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 227 cmdsn = ntohl(bhssc->bhssc_cmdsn); 228 expstatsn = ntohl(bhssc->bhssc_expstatsn); 229 230 CFISCSI_SESSION_LOCK(cs); 231#if 0 232 if (expstatsn != cs->cs_statsn) { 233 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 234 "while current StatSN is %d", expstatsn, 235 cs->cs_statsn); 236 } 237#endif 238 239 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) { 240 /* 241 * The target MUST silently ignore any non-immediate command 242 * outside of this range. 243 */ 244 if (ISCSI_SNLT(cmdsn, cs->cs_cmdsn) || 245 ISCSI_SNGT(cmdsn, cs->cs_cmdsn + maxcmdsn_delta)) { 246 CFISCSI_SESSION_UNLOCK(cs); 247 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 248 "while expected %u", cmdsn, cs->cs_cmdsn); 249 return (true); 250 } 251 252 /* 253 * We don't support multiple connections now, so any 254 * discontinuity in CmdSN means lost PDUs. Since we don't 255 * support PDU retransmission -- terminate the connection. 256 */ 257 if (cmdsn != cs->cs_cmdsn) { 258 CFISCSI_SESSION_UNLOCK(cs); 259 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 260 "while expected %u; dropping connection", 261 cmdsn, cs->cs_cmdsn); 262 cfiscsi_session_terminate(cs); 263 return (true); 264 } 265 cs->cs_cmdsn++; 266 } 267 268 CFISCSI_SESSION_UNLOCK(cs); 269 270 return (false); 271} 272 273static void 274cfiscsi_pdu_handle(struct icl_pdu *request) 275{ 276 struct cfiscsi_session *cs; 277 bool ignore; 278 279 cs = PDU_SESSION(request); 280 281 ignore = cfiscsi_pdu_update_cmdsn(request); 282 if (ignore) { 283 icl_pdu_free(request); 284 return; 285 } 286 287 /* 288 * Handle the PDU; this includes e.g. receiving the remaining 289 * part of PDU and submitting the SCSI command to CTL 290 * or queueing a reply. The handling routine is responsible 291 * for freeing the PDU when it's no longer needed. 292 */ 293 switch (request->ip_bhs->bhs_opcode & 294 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 295 case ISCSI_BHS_OPCODE_NOP_OUT: 296 cfiscsi_pdu_handle_nop_out(request); 297 break; 298 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 299 cfiscsi_pdu_handle_scsi_command(request); 300 break; 301 case ISCSI_BHS_OPCODE_TASK_REQUEST: 302 cfiscsi_pdu_handle_task_request(request); 303 break; 304 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 305 cfiscsi_pdu_handle_data_out(request); 306 break; 307 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 308 cfiscsi_pdu_handle_logout_request(request); 309 break; 310 default: 311 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 312 "opcode 0x%x; dropping connection", 313 request->ip_bhs->bhs_opcode); 314 icl_pdu_free(request); 315 cfiscsi_session_terminate(cs); 316 } 317 318} 319 320static void 321cfiscsi_receive_callback(struct icl_pdu *request) 322{ 323 struct cfiscsi_session *cs; 324 325 cs = PDU_SESSION(request); 326 327#ifdef ICL_KERNEL_PROXY 328 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 329 if (cs->cs_login_pdu == NULL) 330 cs->cs_login_pdu = request; 331 else 332 icl_pdu_free(request); 333 cv_signal(&cs->cs_login_cv); 334 return; 335 } 336#endif 337 338 cfiscsi_pdu_handle(request); 339} 340 341static void 342cfiscsi_error_callback(struct icl_conn *ic) 343{ 344 struct cfiscsi_session *cs; 345 346 cs = CONN_SESSION(ic); 347 348 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 349 cfiscsi_session_terminate(cs); 350} 351 352static int 353cfiscsi_pdu_prepare(struct icl_pdu *response) 354{ 355 struct cfiscsi_session *cs; 356 struct iscsi_bhs_scsi_response *bhssr; 357 bool advance_statsn = true; 358 359 cs = PDU_SESSION(response); 360 361 CFISCSI_SESSION_LOCK_ASSERT(cs); 362 363 /* 364 * We're only using fields common for all the response 365 * (target -> initiator) PDUs. 366 */ 367 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 368 369 /* 370 * 10.8.3: "The StatSN for this connection is not advanced 371 * after this PDU is sent." 372 */ 373 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 374 advance_statsn = false; 375 376 /* 377 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 378 * StatSN for the connection is not advanced after this PDU is sent." 379 */ 380 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 381 bhssr->bhssr_initiator_task_tag == 0xffffffff) 382 advance_statsn = false; 383 384 /* 385 * See the comment below - StatSN is not meaningful and must 386 * not be advanced. 387 */ 388 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 389 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 390 advance_statsn = false; 391 392 /* 393 * 10.7.3: "The fields StatSN, Status, and Residual Count 394 * only have meaningful content if the S bit is set to 1." 395 */ 396 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 397 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 398 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 399 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 400 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 401 402 if (advance_statsn) 403 cs->cs_statsn++; 404 405 return (0); 406} 407 408static void 409cfiscsi_pdu_queue(struct icl_pdu *response) 410{ 411 struct cfiscsi_session *cs; 412 413 cs = PDU_SESSION(response); 414 415 CFISCSI_SESSION_LOCK(cs); 416 cfiscsi_pdu_prepare(response); 417 icl_pdu_queue(response); 418 CFISCSI_SESSION_UNLOCK(cs); 419} 420 421static void 422cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 423{ 424 struct cfiscsi_session *cs; 425 struct iscsi_bhs_nop_out *bhsno; 426 struct iscsi_bhs_nop_in *bhsni; 427 struct icl_pdu *response; 428 void *data = NULL; 429 size_t datasize; 430 int error; 431 432 cs = PDU_SESSION(request); 433 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 434 435 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 436 /* 437 * Nothing to do, iscsi_pdu_update_statsn() already 438 * zeroed the timeout. 439 */ 440 icl_pdu_free(request); 441 return; 442 } 443 444 datasize = icl_pdu_data_segment_length(request); 445 if (datasize > 0) { 446 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 447 if (data == NULL) { 448 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 449 "dropping connection"); 450 icl_pdu_free(request); 451 cfiscsi_session_terminate(cs); 452 return; 453 } 454 icl_pdu_get_data(request, 0, data, datasize); 455 } 456 457 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 458 if (response == NULL) { 459 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 460 "droppping connection"); 461 free(data, M_CFISCSI); 462 icl_pdu_free(request); 463 cfiscsi_session_terminate(cs); 464 return; 465 } 466 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 467 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 468 bhsni->bhsni_flags = 0x80; 469 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 470 bhsni->bhsni_target_transfer_tag = 0xffffffff; 471 if (datasize > 0) { 472 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 473 if (error != 0) { 474 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 475 "dropping connection"); 476 free(data, M_CFISCSI); 477 icl_pdu_free(request); 478 icl_pdu_free(response); 479 cfiscsi_session_terminate(cs); 480 return; 481 } 482 free(data, M_CFISCSI); 483 } 484 485 icl_pdu_free(request); 486 cfiscsi_pdu_queue(response); 487} 488 489static void 490cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 491{ 492 struct iscsi_bhs_scsi_command *bhssc; 493 struct cfiscsi_session *cs; 494 union ctl_io *io; 495 int error; 496 497 cs = PDU_SESSION(request); 498 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 499 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 500 // bhssc->bhssc_initiator_task_tag); 501 502 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 503 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 504 "ImmediateData=No; dropping connection"); 505 icl_pdu_free(request); 506 cfiscsi_session_terminate(cs); 507 return; 508 } 509 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 510 ctl_zero_io(io); 511 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 512 io->io_hdr.io_type = CTL_IO_SCSI; 513 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 514 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 515 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 516 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 517 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 518 case BHSSC_FLAGS_ATTR_UNTAGGED: 519 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 520 break; 521 case BHSSC_FLAGS_ATTR_SIMPLE: 522 io->scsiio.tag_type = CTL_TAG_SIMPLE; 523 break; 524 case BHSSC_FLAGS_ATTR_ORDERED: 525 io->scsiio.tag_type = CTL_TAG_ORDERED; 526 break; 527 case BHSSC_FLAGS_ATTR_HOQ: 528 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 529 break; 530 case BHSSC_FLAGS_ATTR_ACA: 531 io->scsiio.tag_type = CTL_TAG_ACA; 532 break; 533 default: 534 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 535 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 536 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 537 break; 538 } 539 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 540 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 541 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 542 error = ctl_queue(io); 543 if (error != CTL_RETVAL_COMPLETE) { 544 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 545 "dropping connection", error); 546 ctl_free_io(io); 547 refcount_release(&cs->cs_outstanding_ctl_pdus); 548 icl_pdu_free(request); 549 cfiscsi_session_terminate(cs); 550 } 551} 552 553static void 554cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 555{ 556 struct iscsi_bhs_task_management_request *bhstmr; 557 struct iscsi_bhs_task_management_response *bhstmr2; 558 struct icl_pdu *response; 559 struct cfiscsi_session *cs; 560 union ctl_io *io; 561 int error; 562 563 cs = PDU_SESSION(request); 564 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 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_TASK; 569 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 570 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 571 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 572 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 573 574 switch (bhstmr->bhstmr_function & ~0x80) { 575 case BHSTMR_FUNCTION_ABORT_TASK: 576#if 0 577 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 578#endif 579 io->taskio.task_action = CTL_TASK_ABORT_TASK; 580 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 581 break; 582 case BHSTMR_FUNCTION_ABORT_TASK_SET: 583#if 0 584 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 585#endif 586 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 587 break; 588 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 589#if 0 590 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 591#endif 592 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 593 break; 594 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 595#if 0 596 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 597#endif 598 io->taskio.task_action = CTL_TASK_LUN_RESET; 599 break; 600 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 601#if 0 602 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 603#endif 604 io->taskio.task_action = CTL_TASK_TARGET_RESET; 605 break; 606 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 607#if 0 608 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 609#endif 610 io->taskio.task_action = CTL_TASK_TARGET_RESET; 611 break; 612 case BHSTMR_FUNCTION_QUERY_TASK: 613#if 0 614 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 615#endif 616 io->taskio.task_action = CTL_TASK_QUERY_TASK; 617 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 618 break; 619 case BHSTMR_FUNCTION_QUERY_TASK_SET: 620#if 0 621 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 622#endif 623 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 624 break; 625 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 626#if 0 627 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 628#endif 629 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 630 break; 631 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 632#if 0 633 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 634#endif 635 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 636 break; 637 default: 638 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 639 bhstmr->bhstmr_function & ~0x80); 640 ctl_free_io(io); 641 642 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 643 if (response == NULL) { 644 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 645 "dropping connection"); 646 icl_pdu_free(request); 647 cfiscsi_session_terminate(cs); 648 return; 649 } 650 bhstmr2 = (struct iscsi_bhs_task_management_response *) 651 response->ip_bhs; 652 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 653 bhstmr2->bhstmr_flags = 0x80; 654 bhstmr2->bhstmr_response = 655 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 656 bhstmr2->bhstmr_initiator_task_tag = 657 bhstmr->bhstmr_initiator_task_tag; 658 icl_pdu_free(request); 659 cfiscsi_pdu_queue(response); 660 return; 661 } 662 663 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 664 error = ctl_queue(io); 665 if (error != CTL_RETVAL_COMPLETE) { 666 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 667 "dropping connection", error); 668 ctl_free_io(io); 669 refcount_release(&cs->cs_outstanding_ctl_pdus); 670 icl_pdu_free(request); 671 cfiscsi_session_terminate(cs); 672 } 673} 674 675static bool 676cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 677{ 678 struct iscsi_bhs_data_out *bhsdo; 679 struct cfiscsi_session *cs; 680 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 681 size_t copy_len, len, off, buffer_offset; 682 int ctl_sg_count; 683 union ctl_io *io; 684 685 cs = PDU_SESSION(request); 686 687 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 688 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 689 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 690 ISCSI_BHS_OPCODE_SCSI_COMMAND, 691 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 692 693 /* 694 * We're only using fields common for Data-Out and SCSI Command PDUs. 695 */ 696 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 697 698 io = cdw->cdw_ctl_io; 699 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 700 ("CTL_FLAG_DATA_IN")); 701 702#if 0 703 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 704 request->ip_data_len, io->scsiio.kern_total_len); 705#endif 706 707 if (io->scsiio.kern_sg_entries > 0) { 708 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 709 ctl_sg_count = io->scsiio.kern_sg_entries; 710 } else { 711 ctl_sglist = &ctl_sg_entry; 712 ctl_sglist->addr = io->scsiio.kern_data_ptr; 713 ctl_sglist->len = io->scsiio.kern_data_len; 714 ctl_sg_count = 1; 715 } 716 717 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 718 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 719 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 720 else 721 buffer_offset = 0; 722 len = icl_pdu_data_segment_length(request); 723 724 /* 725 * Make sure the offset, as sent by the initiator, matches the offset 726 * we're supposed to be at in the scatter-gather list. 727 */ 728 if (buffer_offset > 729 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 730 buffer_offset + len <= 731 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 732 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 733 "expected %zd; dropping connection", buffer_offset, 734 (size_t)io->scsiio.kern_rel_offset + 735 (size_t)io->scsiio.ext_data_filled); 736 ctl_set_data_phase_error(&io->scsiio); 737 cfiscsi_session_terminate(cs); 738 return (true); 739 } 740 741 /* 742 * This is the offset within the PDU data segment, as opposed 743 * to buffer_offset, which is the offset within the task (SCSI 744 * command). 745 */ 746 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 747 buffer_offset; 748 749 /* 750 * Iterate over the scatter/gather segments, filling them with data 751 * from the PDU data segment. Note that this can get called multiple 752 * times for one SCSI command; the cdw structure holds state for the 753 * scatter/gather list. 754 */ 755 for (;;) { 756 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 757 ("cdw->cdw_sg_index >= ctl_sg_count")); 758 if (cdw->cdw_sg_len == 0) { 759 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 760 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 761 } 762 KASSERT(off <= len, ("len > off")); 763 copy_len = len - off; 764 if (copy_len > cdw->cdw_sg_len) 765 copy_len = cdw->cdw_sg_len; 766 767 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 768 cdw->cdw_sg_addr += copy_len; 769 cdw->cdw_sg_len -= copy_len; 770 off += copy_len; 771 io->scsiio.ext_data_filled += copy_len; 772 773 if (cdw->cdw_sg_len == 0) { 774 /* 775 * End of current segment. 776 */ 777 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 778 /* 779 * Last segment in scatter/gather list. 780 */ 781 break; 782 } 783 cdw->cdw_sg_index++; 784 } 785 786 if (off == len) { 787 /* 788 * End of PDU payload. 789 */ 790 break; 791 } 792 } 793 794 if (len > off) { 795 /* 796 * In case of unsolicited data, it's possible that the buffer 797 * provided by CTL is smaller than negotiated FirstBurstLength. 798 * Just ignore the superfluous data; will ask for them with R2T 799 * on next call to cfiscsi_datamove(). 800 * 801 * This obviously can only happen with SCSI Command PDU. 802 */ 803 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 804 ISCSI_BHS_OPCODE_SCSI_COMMAND) 805 return (true); 806 807 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 808 "expected %zd; dropping connection", 809 icl_pdu_data_segment_length(request), off); 810 ctl_set_data_phase_error(&io->scsiio); 811 cfiscsi_session_terminate(cs); 812 return (true); 813 } 814 815 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 816 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 817 CFISCSI_SESSION_WARN(cs, "got the final packet without " 818 "the F flag; flags = 0x%x; dropping connection", 819 bhsdo->bhsdo_flags); 820 ctl_set_data_phase_error(&io->scsiio); 821 cfiscsi_session_terminate(cs); 822 return (true); 823 } 824 825 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 826 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 827 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 828 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 829 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 830 "transmitted size was %zd bytes instead of %d; " 831 "dropping connection", 832 (size_t)io->scsiio.ext_data_filled, 833 cdw->cdw_r2t_end); 834 ctl_set_data_phase_error(&io->scsiio); 835 cfiscsi_session_terminate(cs); 836 return (true); 837 } else { 838 /* 839 * For SCSI Command PDU, this just means we need to 840 * solicit more data by sending R2T. 841 */ 842 return (false); 843 } 844 } 845 846 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 847#if 0 848 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 849 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 850#endif 851 852 return (true); 853 } 854 855 return (false); 856} 857 858static void 859cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 860{ 861 struct iscsi_bhs_data_out *bhsdo; 862 struct cfiscsi_session *cs; 863 struct cfiscsi_data_wait *cdw = NULL; 864 union ctl_io *io; 865 bool done; 866 867 cs = PDU_SESSION(request); 868 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 869 870 CFISCSI_SESSION_LOCK(cs); 871 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 872#if 0 873 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 874 "ttt 0x%x, itt 0x%x", 875 bhsdo->bhsdo_target_transfer_tag, 876 bhsdo->bhsdo_initiator_task_tag, 877 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 878#endif 879 if (bhsdo->bhsdo_target_transfer_tag == 880 cdw->cdw_target_transfer_tag) 881 break; 882 } 883 CFISCSI_SESSION_UNLOCK(cs); 884 if (cdw == NULL) { 885 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 886 "0x%x, not found; dropping connection", 887 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 888 icl_pdu_free(request); 889 cfiscsi_session_terminate(cs); 890 return; 891 } 892 893 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 894 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 895 "DataSN %u, while expected %u; dropping connection", 896 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 897 icl_pdu_free(request); 898 cfiscsi_session_terminate(cs); 899 return; 900 } 901 cdw->cdw_datasn++; 902 903 io = cdw->cdw_ctl_io; 904 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 905 ("CTL_FLAG_DATA_IN")); 906 907 done = cfiscsi_handle_data_segment(request, cdw); 908 if (done) { 909 CFISCSI_SESSION_LOCK(cs); 910 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 911 CFISCSI_SESSION_UNLOCK(cs); 912 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 913 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 914 cfiscsi_data_wait_free(cs, cdw); 915 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 916 if (done) 917 io->scsiio.be_move_done(io); 918 else 919 cfiscsi_datamove_out(io); 920 } 921 922 icl_pdu_free(request); 923} 924 925static void 926cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 927{ 928 struct iscsi_bhs_logout_request *bhslr; 929 struct iscsi_bhs_logout_response *bhslr2; 930 struct icl_pdu *response; 931 struct cfiscsi_session *cs; 932 933 cs = PDU_SESSION(request); 934 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 935 switch (bhslr->bhslr_reason & 0x7f) { 936 case BHSLR_REASON_CLOSE_SESSION: 937 case BHSLR_REASON_CLOSE_CONNECTION: 938 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 939 if (response == NULL) { 940 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 941 icl_pdu_free(request); 942 cfiscsi_session_terminate(cs); 943 return; 944 } 945 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 946 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 947 bhslr2->bhslr_flags = 0x80; 948 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 949 bhslr2->bhslr_initiator_task_tag = 950 bhslr->bhslr_initiator_task_tag; 951 icl_pdu_free(request); 952 cfiscsi_pdu_queue(response); 953 cfiscsi_session_terminate(cs); 954 break; 955 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 956 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 957 if (response == NULL) { 958 CFISCSI_SESSION_WARN(cs, 959 "failed to allocate memory; dropping connection"); 960 icl_pdu_free(request); 961 cfiscsi_session_terminate(cs); 962 return; 963 } 964 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 965 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 966 bhslr2->bhslr_flags = 0x80; 967 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 968 bhslr2->bhslr_initiator_task_tag = 969 bhslr->bhslr_initiator_task_tag; 970 icl_pdu_free(request); 971 cfiscsi_pdu_queue(response); 972 break; 973 default: 974 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 975 bhslr->bhslr_reason); 976 icl_pdu_free(request); 977 cfiscsi_session_terminate(cs); 978 break; 979 } 980} 981 982static void 983cfiscsi_callout(void *context) 984{ 985 struct icl_pdu *cp; 986 struct iscsi_bhs_nop_in *bhsni; 987 struct cfiscsi_session *cs; 988 989 cs = context; 990 991 if (cs->cs_terminating) 992 return; 993 994 callout_schedule(&cs->cs_callout, 1 * hz); 995 996 atomic_add_int(&cs->cs_timeout, 1); 997 998#ifdef ICL_KERNEL_PROXY 999 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1000 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1001 CFISCSI_SESSION_WARN(cs, "login timed out after " 1002 "%d seconds; dropping connection", cs->cs_timeout); 1003 cfiscsi_session_terminate(cs); 1004 } 1005 return; 1006 } 1007#endif 1008 1009 if (ping_timeout <= 0) { 1010 /* 1011 * Pings are disabled. Don't send NOP-In in this case; 1012 * user might have disabled pings to work around problems 1013 * with certain initiators that can't properly handle 1014 * NOP-In, such as iPXE. Reset the timeout, to avoid 1015 * triggering reconnection, should the user decide to 1016 * reenable them. 1017 */ 1018 cs->cs_timeout = 0; 1019 return; 1020 } 1021 1022 if (cs->cs_timeout >= ping_timeout) { 1023 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1024 "dropping connection", ping_timeout); 1025 cfiscsi_session_terminate(cs); 1026 return; 1027 } 1028 1029 /* 1030 * If the ping was reset less than one second ago - which means 1031 * that we've received some PDU during the last second - assume 1032 * the traffic flows correctly and don't bother sending a NOP-Out. 1033 * 1034 * (It's 2 - one for one second, and one for incrementing is_timeout 1035 * earlier in this routine.) 1036 */ 1037 if (cs->cs_timeout < 2) 1038 return; 1039 1040 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1041 if (cp == NULL) { 1042 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1043 return; 1044 } 1045 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1046 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1047 bhsni->bhsni_flags = 0x80; 1048 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1049 1050 cfiscsi_pdu_queue(cp); 1051} 1052 1053static struct cfiscsi_data_wait * 1054cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1055 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1056{ 1057 struct cfiscsi_data_wait *cdw; 1058 int error; 1059 1060 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1061 if (cdw == NULL) { 1062 CFISCSI_SESSION_WARN(cs, 1063 "failed to allocate %zd bytes", sizeof(*cdw)); 1064 return (NULL); 1065 } 1066 1067 error = icl_conn_transfer_setup(cs->cs_conn, io, target_transfer_tagp, 1068 &cdw->cdw_icl_prv); 1069 if (error != 0) { 1070 CFISCSI_SESSION_WARN(cs, 1071 "icl_conn_transfer_setup() failed with error %d", error); 1072 uma_zfree(cfiscsi_data_wait_zone, cdw); 1073 return (NULL); 1074 } 1075 1076 cdw->cdw_ctl_io = io; 1077 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1078 cdw->cdw_initiator_task_tag = initiator_task_tag; 1079 1080 return (cdw); 1081} 1082 1083static void 1084cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1085 struct cfiscsi_data_wait *cdw) 1086{ 1087 1088 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1089 uma_zfree(cfiscsi_data_wait_zone, cdw); 1090} 1091 1092static void 1093cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1094{ 1095 struct cfiscsi_data_wait *cdw; 1096 union ctl_io *io; 1097 int error, last, wait; 1098 1099 if (cs->cs_target == NULL) 1100 return; /* No target yet, so nothing to do. */ 1101 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1102 ctl_zero_io(io); 1103 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1104 io->io_hdr.io_type = CTL_IO_TASK; 1105 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1106 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1107 io->io_hdr.nexus.targ_lun = 0; 1108 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1109 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1110 wait = cs->cs_outstanding_ctl_pdus; 1111 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1112 error = ctl_queue(io); 1113 if (error != CTL_RETVAL_COMPLETE) { 1114 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1115 refcount_release(&cs->cs_outstanding_ctl_pdus); 1116 ctl_free_io(io); 1117 } 1118 1119 CFISCSI_SESSION_LOCK(cs); 1120 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1121 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1122 CFISCSI_SESSION_UNLOCK(cs); 1123 /* 1124 * Set nonzero port status; this prevents backends from 1125 * assuming that the data transfer actually succeeded 1126 * and writing uninitialized data to disk. 1127 */ 1128 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1129 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1130 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1131 cfiscsi_data_wait_free(cs, cdw); 1132 CFISCSI_SESSION_LOCK(cs); 1133 } 1134 CFISCSI_SESSION_UNLOCK(cs); 1135 1136 /* 1137 * Wait for CTL to terminate all the tasks. 1138 */ 1139 if (wait > 0) 1140 CFISCSI_SESSION_WARN(cs, 1141 "waiting for CTL to terminate %d tasks", wait); 1142 for (;;) { 1143 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1144 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1145 if (last != 0) 1146 break; 1147 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1148 0, "cfiscsi_terminate", hz / 100); 1149 } 1150 if (wait > 0) 1151 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1152} 1153 1154static void 1155cfiscsi_maintenance_thread(void *arg) 1156{ 1157 struct cfiscsi_session *cs; 1158 1159 cs = arg; 1160 1161 for (;;) { 1162 CFISCSI_SESSION_LOCK(cs); 1163 if (cs->cs_terminating == false) 1164 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1165 CFISCSI_SESSION_UNLOCK(cs); 1166 1167 if (cs->cs_terminating) { 1168 1169 /* 1170 * We used to wait up to 30 seconds to deliver queued 1171 * PDUs to the initiator. We also tried hard to deliver 1172 * SCSI Responses for the aborted PDUs. We don't do 1173 * that anymore. We might need to revisit that. 1174 */ 1175 callout_drain(&cs->cs_callout); 1176 icl_conn_close(cs->cs_conn); 1177 1178 /* 1179 * At this point ICL receive thread is no longer 1180 * running; no new tasks can be queued. 1181 */ 1182 cfiscsi_session_terminate_tasks(cs); 1183 cfiscsi_session_delete(cs); 1184 kthread_exit(); 1185 return; 1186 } 1187 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1188 } 1189} 1190 1191static void 1192cfiscsi_session_terminate(struct cfiscsi_session *cs) 1193{ 1194 1195 if (cs->cs_terminating) 1196 return; 1197 cs->cs_terminating = true; 1198 cv_signal(&cs->cs_maintenance_cv); 1199#ifdef ICL_KERNEL_PROXY 1200 cv_signal(&cs->cs_login_cv); 1201#endif 1202} 1203 1204static int 1205cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1206{ 1207 struct cfiscsi_target *ct; 1208 char *name; 1209 int i; 1210 1211 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1212 1213 ct = cs->cs_target; 1214 name = strdup(cs->cs_initiator_id, M_CTL); 1215 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1216 if (i < 0) { 1217 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1218 i); 1219 cs->cs_ctl_initid = -1; 1220 return (1); 1221 } 1222 cs->cs_ctl_initid = i; 1223#if 0 1224 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1225#endif 1226 1227 return (0); 1228} 1229 1230static void 1231cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1232{ 1233 int error; 1234 1235 if (cs->cs_ctl_initid == -1) 1236 return; 1237 1238 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1239 if (error != 0) { 1240 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1241 error); 1242 } 1243 cs->cs_ctl_initid = -1; 1244} 1245 1246static struct cfiscsi_session * 1247cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1248{ 1249 struct cfiscsi_session *cs; 1250 int error; 1251 1252 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1253 if (cs == NULL) { 1254 CFISCSI_WARN("malloc failed"); 1255 return (NULL); 1256 } 1257 cs->cs_ctl_initid = -1; 1258 1259 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1260 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1261 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1262 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1263#ifdef ICL_KERNEL_PROXY 1264 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1265#endif 1266 1267 cs->cs_conn = icl_new_conn(offload, "cfiscsi", &cs->cs_lock); 1268 if (cs->cs_conn == NULL) { 1269 free(cs, M_CFISCSI); 1270 return (NULL); 1271 } 1272 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1273 cs->cs_conn->ic_error = cfiscsi_error_callback; 1274 cs->cs_conn->ic_prv0 = cs; 1275 1276 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1277 if (error != 0) { 1278 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1279 free(cs, M_CFISCSI); 1280 return (NULL); 1281 } 1282 1283 mtx_lock(&softc->lock); 1284 cs->cs_id = ++softc->last_session_id; 1285 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1286 mtx_unlock(&softc->lock); 1287 1288 /* 1289 * Start pinging the initiator. 1290 */ 1291 callout_init(&cs->cs_callout, 1); 1292 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1293 1294 return (cs); 1295} 1296 1297static void 1298cfiscsi_session_delete(struct cfiscsi_session *cs) 1299{ 1300 struct cfiscsi_softc *softc; 1301 1302 softc = &cfiscsi_softc; 1303 1304 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1305 ("destroying session with outstanding CTL pdus")); 1306 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1307 ("destroying session with non-empty queue")); 1308 1309 cfiscsi_session_unregister_initiator(cs); 1310 if (cs->cs_target != NULL) 1311 cfiscsi_target_release(cs->cs_target); 1312 icl_conn_close(cs->cs_conn); 1313 icl_conn_free(cs->cs_conn); 1314 1315 mtx_lock(&softc->lock); 1316 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1317 cv_signal(&softc->sessions_cv); 1318 mtx_unlock(&softc->lock); 1319 1320 free(cs, M_CFISCSI); 1321} 1322 1323int 1324cfiscsi_init(void) 1325{ 1326 struct cfiscsi_softc *softc; 1327 1328 softc = &cfiscsi_softc; 1329 bzero(softc, sizeof(*softc)); 1330 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1331 1332 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1333#ifdef ICL_KERNEL_PROXY 1334 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1335#endif 1336 TAILQ_INIT(&softc->sessions); 1337 TAILQ_INIT(&softc->targets); 1338 1339 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1340 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1341 UMA_ALIGN_PTR, 0); 1342 1343 return (0); 1344} 1345 1346#ifdef ICL_KERNEL_PROXY 1347static void 1348cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1349{ 1350 struct cfiscsi_session *cs; 1351 1352 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1353 if (cs == NULL) { 1354 CFISCSI_WARN("failed to create session"); 1355 return; 1356 } 1357 1358 icl_conn_handoff_sock(cs->cs_conn, so); 1359 cs->cs_initiator_sa = sa; 1360 cs->cs_portal_id = portal_id; 1361 cs->cs_waiting_for_ctld = true; 1362 cv_signal(&cfiscsi_softc.accept_cv); 1363} 1364#endif 1365 1366static void 1367cfiscsi_online(void *arg) 1368{ 1369 struct cfiscsi_softc *softc; 1370 struct cfiscsi_target *ct; 1371 int online; 1372 1373 ct = (struct cfiscsi_target *)arg; 1374 softc = ct->ct_softc; 1375 1376 mtx_lock(&softc->lock); 1377 if (ct->ct_online) { 1378 mtx_unlock(&softc->lock); 1379 return; 1380 } 1381 ct->ct_online = 1; 1382 online = softc->online++; 1383 mtx_unlock(&softc->lock); 1384 if (online > 0) 1385 return; 1386 1387#ifdef ICL_KERNEL_PROXY 1388 if (softc->listener != NULL) 1389 icl_listen_free(softc->listener); 1390 softc->listener = icl_listen_new(cfiscsi_accept); 1391#endif 1392} 1393 1394static void 1395cfiscsi_offline(void *arg) 1396{ 1397 struct cfiscsi_softc *softc; 1398 struct cfiscsi_target *ct; 1399 struct cfiscsi_session *cs; 1400 int online; 1401 1402 ct = (struct cfiscsi_target *)arg; 1403 softc = ct->ct_softc; 1404 1405 mtx_lock(&softc->lock); 1406 if (!ct->ct_online) { 1407 mtx_unlock(&softc->lock); 1408 return; 1409 } 1410 ct->ct_online = 0; 1411 online = --softc->online; 1412 1413 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1414 if (cs->cs_target == ct) 1415 cfiscsi_session_terminate(cs); 1416 } 1417 do { 1418 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1419 if (cs->cs_target == ct) 1420 break; 1421 } 1422 if (cs != NULL) 1423 cv_wait(&softc->sessions_cv, &softc->lock); 1424 } while (cs != NULL && ct->ct_online == 0); 1425 mtx_unlock(&softc->lock); 1426 if (online > 0) 1427 return; 1428 1429#ifdef ICL_KERNEL_PROXY 1430 icl_listen_free(softc->listener); 1431 softc->listener = NULL; 1432#endif 1433} 1434 1435static int 1436cfiscsi_info(void *arg, struct sbuf *sb) 1437{ 1438 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1439 int retval; 1440 1441 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1442 ct->ct_state); 1443 return (retval); 1444} 1445 1446static void 1447cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1448{ 1449 struct cfiscsi_softc *softc; 1450 struct cfiscsi_session *cs, *cs2; 1451 struct cfiscsi_target *ct; 1452 struct ctl_iscsi_handoff_params *cihp; 1453 int error; 1454 1455 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1456 softc = &cfiscsi_softc; 1457 1458 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1459 cihp->initiator_name, cihp->initiator_addr, 1460 cihp->target_name); 1461 1462 ct = cfiscsi_target_find(softc, cihp->target_name, 1463 cihp->portal_group_tag); 1464 if (ct == NULL) { 1465 ci->status = CTL_ISCSI_ERROR; 1466 snprintf(ci->error_str, sizeof(ci->error_str), 1467 "%s: target not found", __func__); 1468 return; 1469 } 1470 1471#ifdef ICL_KERNEL_PROXY 1472 if (cihp->socket > 0 && cihp->connection_id > 0) { 1473 snprintf(ci->error_str, sizeof(ci->error_str), 1474 "both socket and connection_id set"); 1475 ci->status = CTL_ISCSI_ERROR; 1476 cfiscsi_target_release(ct); 1477 return; 1478 } 1479 if (cihp->socket == 0) { 1480 mtx_lock(&cfiscsi_softc.lock); 1481 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1482 if (cs->cs_id == cihp->connection_id) 1483 break; 1484 } 1485 if (cs == NULL) { 1486 mtx_unlock(&cfiscsi_softc.lock); 1487 snprintf(ci->error_str, sizeof(ci->error_str), 1488 "connection not found"); 1489 ci->status = CTL_ISCSI_ERROR; 1490 cfiscsi_target_release(ct); 1491 return; 1492 } 1493 mtx_unlock(&cfiscsi_softc.lock); 1494 } else { 1495#endif 1496 cs = cfiscsi_session_new(softc, cihp->offload); 1497 if (cs == NULL) { 1498 ci->status = CTL_ISCSI_ERROR; 1499 snprintf(ci->error_str, sizeof(ci->error_str), 1500 "%s: cfiscsi_session_new failed", __func__); 1501 cfiscsi_target_release(ct); 1502 return; 1503 } 1504#ifdef ICL_KERNEL_PROXY 1505 } 1506#endif 1507 1508 /* 1509 * First PDU of Full Feature phase has the same CmdSN as the last 1510 * PDU from the Login Phase received from the initiator. Thus, 1511 * the -1 below. 1512 */ 1513 cs->cs_cmdsn = cihp->cmdsn; 1514 cs->cs_statsn = cihp->statsn; 1515 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1516 cs->cs_max_burst_length = cihp->max_burst_length; 1517 cs->cs_immediate_data = !!cihp->immediate_data; 1518 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1519 cs->cs_conn->ic_header_crc32c = true; 1520 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1521 cs->cs_conn->ic_data_crc32c = true; 1522 1523 strlcpy(cs->cs_initiator_name, 1524 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1525 strlcpy(cs->cs_initiator_addr, 1526 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1527 strlcpy(cs->cs_initiator_alias, 1528 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1529 memcpy(cs->cs_initiator_isid, 1530 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1531 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1532 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1533 cihp->initiator_isid[0], cihp->initiator_isid[1], 1534 cihp->initiator_isid[2], cihp->initiator_isid[3], 1535 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1536 1537 mtx_lock(&softc->lock); 1538 if (ct->ct_online == 0) { 1539 mtx_unlock(&softc->lock); 1540 cfiscsi_session_terminate(cs); 1541 cfiscsi_target_release(ct); 1542 ci->status = CTL_ISCSI_ERROR; 1543 snprintf(ci->error_str, sizeof(ci->error_str), 1544 "%s: port offline", __func__); 1545 return; 1546 } 1547 cs->cs_target = ct; 1548 mtx_unlock(&softc->lock); 1549 1550 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1551restart: 1552 if (!cs->cs_terminating) { 1553 mtx_lock(&softc->lock); 1554 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1555 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1556 cs->cs_target == cs2->cs_target && 1557 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1558 if (strcmp(cs->cs_initiator_addr, 1559 cs2->cs_initiator_addr) != 0) { 1560 CFISCSI_SESSION_WARN(cs2, 1561 "session reinstatement from " 1562 "different address %s", 1563 cs->cs_initiator_addr); 1564 } else { 1565 CFISCSI_SESSION_DEBUG(cs2, 1566 "session reinstatement"); 1567 } 1568 cfiscsi_session_terminate(cs2); 1569 mtx_unlock(&softc->lock); 1570 pause("cfiscsi_reinstate", 1); 1571 goto restart; 1572 } 1573 } 1574 mtx_unlock(&softc->lock); 1575 } 1576 1577 /* 1578 * Register initiator with CTL. 1579 */ 1580 cfiscsi_session_register_initiator(cs); 1581 1582#ifdef ICL_KERNEL_PROXY 1583 if (cihp->socket > 0) { 1584#endif 1585 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1586 if (error != 0) { 1587 cfiscsi_session_terminate(cs); 1588 refcount_release(&cs->cs_outstanding_ctl_pdus); 1589 ci->status = CTL_ISCSI_ERROR; 1590 snprintf(ci->error_str, sizeof(ci->error_str), 1591 "%s: icl_conn_handoff failed with error %d", 1592 __func__, error); 1593 return; 1594 } 1595#ifdef ICL_KERNEL_PROXY 1596 } 1597#endif 1598 1599#ifdef ICL_KERNEL_PROXY 1600 cs->cs_login_phase = false; 1601 1602 /* 1603 * First PDU of the Full Feature phase has likely already arrived. 1604 * We have to pick it up and execute properly. 1605 */ 1606 if (cs->cs_login_pdu != NULL) { 1607 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1608 cfiscsi_pdu_handle(cs->cs_login_pdu); 1609 cs->cs_login_pdu = NULL; 1610 } 1611#endif 1612 1613 refcount_release(&cs->cs_outstanding_ctl_pdus); 1614 ci->status = CTL_ISCSI_OK; 1615} 1616 1617static void 1618cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1619{ 1620 struct ctl_iscsi_list_params *cilp; 1621 struct cfiscsi_session *cs; 1622 struct cfiscsi_softc *softc; 1623 struct sbuf *sb; 1624 int error; 1625 1626 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1627 softc = &cfiscsi_softc; 1628 1629 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1630 if (sb == NULL) { 1631 ci->status = CTL_ISCSI_ERROR; 1632 snprintf(ci->error_str, sizeof(ci->error_str), 1633 "Unable to allocate %d bytes for iSCSI session list", 1634 cilp->alloc_len); 1635 return; 1636 } 1637 1638 sbuf_printf(sb, "<ctlislist>\n"); 1639 mtx_lock(&softc->lock); 1640 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1641#ifdef ICL_KERNEL_PROXY 1642 if (cs->cs_target == NULL) 1643 continue; 1644#endif 1645 error = sbuf_printf(sb, "<connection id=\"%d\">" 1646 "<initiator>%s</initiator>" 1647 "<initiator_addr>%s</initiator_addr>" 1648 "<initiator_alias>%s</initiator_alias>" 1649 "<target>%s</target>" 1650 "<target_alias>%s</target_alias>" 1651 "<target_portal_group_tag>%u</target_portal_group_tag>" 1652 "<header_digest>%s</header_digest>" 1653 "<data_digest>%s</data_digest>" 1654 "<max_data_segment_length>%zd</max_data_segment_length>" 1655 "<immediate_data>%d</immediate_data>" 1656 "<iser>%d</iser>" 1657 "<offload>%s</offload>" 1658 "</connection>\n", 1659 cs->cs_id, 1660 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1661 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1662 cs->cs_target->ct_tag, 1663 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1664 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1665 cs->cs_max_data_segment_length, 1666 cs->cs_immediate_data, 1667 cs->cs_conn->ic_iser, 1668 cs->cs_conn->ic_offload); 1669 if (error != 0) 1670 break; 1671 } 1672 mtx_unlock(&softc->lock); 1673 error = sbuf_printf(sb, "</ctlislist>\n"); 1674 if (error != 0) { 1675 sbuf_delete(sb); 1676 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1677 snprintf(ci->error_str, sizeof(ci->error_str), 1678 "Out of space, %d bytes is too small", cilp->alloc_len); 1679 return; 1680 } 1681 sbuf_finish(sb); 1682 1683 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1684 cilp->fill_len = sbuf_len(sb) + 1; 1685 ci->status = CTL_ISCSI_OK; 1686 sbuf_delete(sb); 1687} 1688 1689static void 1690cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1691{ 1692 struct icl_pdu *response; 1693 struct iscsi_bhs_asynchronous_message *bhsam; 1694 struct ctl_iscsi_logout_params *cilp; 1695 struct cfiscsi_session *cs; 1696 struct cfiscsi_softc *softc; 1697 int found = 0; 1698 1699 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1700 softc = &cfiscsi_softc; 1701 1702 mtx_lock(&softc->lock); 1703 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1704 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1705 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1706 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1707 continue; 1708 1709 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1710 if (response == NULL) { 1711 ci->status = CTL_ISCSI_ERROR; 1712 snprintf(ci->error_str, sizeof(ci->error_str), 1713 "Unable to allocate memory"); 1714 mtx_unlock(&softc->lock); 1715 return; 1716 } 1717 bhsam = 1718 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1719 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1720 bhsam->bhsam_flags = 0x80; 1721 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1722 bhsam->bhsam_parameter3 = htons(10); 1723 cfiscsi_pdu_queue(response); 1724 found++; 1725 } 1726 mtx_unlock(&softc->lock); 1727 1728 if (found == 0) { 1729 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1730 snprintf(ci->error_str, sizeof(ci->error_str), 1731 "No matching connections found"); 1732 return; 1733 } 1734 1735 ci->status = CTL_ISCSI_OK; 1736} 1737 1738static void 1739cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1740{ 1741 struct icl_pdu *response; 1742 struct iscsi_bhs_asynchronous_message *bhsam; 1743 struct ctl_iscsi_terminate_params *citp; 1744 struct cfiscsi_session *cs; 1745 struct cfiscsi_softc *softc; 1746 int found = 0; 1747 1748 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1749 softc = &cfiscsi_softc; 1750 1751 mtx_lock(&softc->lock); 1752 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1753 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1754 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1755 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1756 continue; 1757 1758 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1759 if (response == NULL) { 1760 /* 1761 * Oh well. Just terminate the connection. 1762 */ 1763 } else { 1764 bhsam = (struct iscsi_bhs_asynchronous_message *) 1765 response->ip_bhs; 1766 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1767 bhsam->bhsam_flags = 0x80; 1768 bhsam->bhsam_0xffffffff = 0xffffffff; 1769 bhsam->bhsam_async_event = 1770 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1771 cfiscsi_pdu_queue(response); 1772 } 1773 cfiscsi_session_terminate(cs); 1774 found++; 1775 } 1776 mtx_unlock(&softc->lock); 1777 1778 if (found == 0) { 1779 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1780 snprintf(ci->error_str, sizeof(ci->error_str), 1781 "No matching connections found"); 1782 return; 1783 } 1784 1785 ci->status = CTL_ISCSI_OK; 1786} 1787 1788static void 1789cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1790{ 1791 struct ctl_iscsi_limits_params *cilp; 1792 int error; 1793 1794 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1795 1796 error = icl_limits(cilp->offload, &cilp->data_segment_limit); 1797 if (error != 0) { 1798 ci->status = CTL_ISCSI_ERROR; 1799 snprintf(ci->error_str, sizeof(ci->error_str), 1800 "%s: icl_limits failed with error %d", 1801 __func__, error); 1802 return; 1803 } 1804 1805 ci->status = CTL_ISCSI_OK; 1806} 1807 1808#ifdef ICL_KERNEL_PROXY 1809static void 1810cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1811{ 1812 struct ctl_iscsi_listen_params *cilp; 1813 struct sockaddr *sa; 1814 int error; 1815 1816 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1817 1818 if (cfiscsi_softc.listener == NULL) { 1819 CFISCSI_DEBUG("no listener"); 1820 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1821 ci->status = CTL_ISCSI_ERROR; 1822 return; 1823 } 1824 1825 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1826 if (error != 0) { 1827 CFISCSI_DEBUG("getsockaddr, error %d", error); 1828 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1829 ci->status = CTL_ISCSI_ERROR; 1830 return; 1831 } 1832 1833 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1834 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1835 if (error != 0) { 1836 free(sa, M_SONAME); 1837 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1838 snprintf(ci->error_str, sizeof(ci->error_str), 1839 "icl_listen_add failed, error %d", error); 1840 ci->status = CTL_ISCSI_ERROR; 1841 return; 1842 } 1843 1844 ci->status = CTL_ISCSI_OK; 1845} 1846 1847static void 1848cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1849{ 1850 struct ctl_iscsi_accept_params *ciap; 1851 struct cfiscsi_session *cs; 1852 int error; 1853 1854 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1855 1856 mtx_lock(&cfiscsi_softc.lock); 1857 for (;;) { 1858 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1859 if (cs->cs_waiting_for_ctld) 1860 break; 1861 } 1862 if (cs != NULL) 1863 break; 1864 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1865 if (error != 0) { 1866 mtx_unlock(&cfiscsi_softc.lock); 1867 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1868 ci->status = CTL_ISCSI_ERROR; 1869 return; 1870 } 1871 } 1872 mtx_unlock(&cfiscsi_softc.lock); 1873 1874 cs->cs_waiting_for_ctld = false; 1875 cs->cs_login_phase = true; 1876 1877 ciap->connection_id = cs->cs_id; 1878 ciap->portal_id = cs->cs_portal_id; 1879 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1880 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1881 cs->cs_initiator_sa->sa_len); 1882 if (error != 0) { 1883 snprintf(ci->error_str, sizeof(ci->error_str), 1884 "copyout failed with error %d", error); 1885 ci->status = CTL_ISCSI_ERROR; 1886 return; 1887 } 1888 1889 ci->status = CTL_ISCSI_OK; 1890} 1891 1892static void 1893cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1894{ 1895 struct ctl_iscsi_send_params *cisp; 1896 struct cfiscsi_session *cs; 1897 struct icl_pdu *ip; 1898 size_t datalen; 1899 void *data; 1900 int error; 1901 1902 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1903 1904 mtx_lock(&cfiscsi_softc.lock); 1905 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1906 if (cs->cs_id == cisp->connection_id) 1907 break; 1908 } 1909 if (cs == NULL) { 1910 mtx_unlock(&cfiscsi_softc.lock); 1911 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1912 ci->status = CTL_ISCSI_ERROR; 1913 return; 1914 } 1915 mtx_unlock(&cfiscsi_softc.lock); 1916 1917#if 0 1918 if (cs->cs_login_phase == false) 1919 return (EBUSY); 1920#endif 1921 1922 if (cs->cs_terminating) { 1923 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1924 ci->status = CTL_ISCSI_ERROR; 1925 return; 1926 } 1927 1928 datalen = cisp->data_segment_len; 1929 /* 1930 * XXX 1931 */ 1932 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1933 if (datalen > 65535) { 1934 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1935 ci->status = CTL_ISCSI_ERROR; 1936 return; 1937 } 1938 if (datalen > 0) { 1939 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1940 error = copyin(cisp->data_segment, data, datalen); 1941 if (error != 0) { 1942 free(data, M_CFISCSI); 1943 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1944 ci->status = CTL_ISCSI_ERROR; 1945 return; 1946 } 1947 } 1948 1949 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1950 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1951 if (datalen > 0) { 1952 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1953 free(data, M_CFISCSI); 1954 } 1955 CFISCSI_SESSION_LOCK(cs); 1956 icl_pdu_queue(ip); 1957 CFISCSI_SESSION_UNLOCK(cs); 1958 ci->status = CTL_ISCSI_OK; 1959} 1960 1961static void 1962cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1963{ 1964 struct ctl_iscsi_receive_params *cirp; 1965 struct cfiscsi_session *cs; 1966 struct icl_pdu *ip; 1967 void *data; 1968 int error; 1969 1970 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1971 1972 mtx_lock(&cfiscsi_softc.lock); 1973 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1974 if (cs->cs_id == cirp->connection_id) 1975 break; 1976 } 1977 if (cs == NULL) { 1978 mtx_unlock(&cfiscsi_softc.lock); 1979 snprintf(ci->error_str, sizeof(ci->error_str), 1980 "connection not found"); 1981 ci->status = CTL_ISCSI_ERROR; 1982 return; 1983 } 1984 mtx_unlock(&cfiscsi_softc.lock); 1985 1986#if 0 1987 if (is->is_login_phase == false) 1988 return (EBUSY); 1989#endif 1990 1991 CFISCSI_SESSION_LOCK(cs); 1992 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1993 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1994 if (error != 0) { 1995 CFISCSI_SESSION_UNLOCK(cs); 1996 snprintf(ci->error_str, sizeof(ci->error_str), 1997 "interrupted by signal"); 1998 ci->status = CTL_ISCSI_ERROR; 1999 return; 2000 } 2001 } 2002 2003 if (cs->cs_terminating) { 2004 CFISCSI_SESSION_UNLOCK(cs); 2005 snprintf(ci->error_str, sizeof(ci->error_str), 2006 "connection terminating"); 2007 ci->status = CTL_ISCSI_ERROR; 2008 return; 2009 } 2010 ip = cs->cs_login_pdu; 2011 cs->cs_login_pdu = NULL; 2012 CFISCSI_SESSION_UNLOCK(cs); 2013 2014 if (ip->ip_data_len > cirp->data_segment_len) { 2015 icl_pdu_free(ip); 2016 snprintf(ci->error_str, sizeof(ci->error_str), 2017 "data segment too big"); 2018 ci->status = CTL_ISCSI_ERROR; 2019 return; 2020 } 2021 2022 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2023 if (ip->ip_data_len > 0) { 2024 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2025 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2026 copyout(data, cirp->data_segment, ip->ip_data_len); 2027 free(data, M_CFISCSI); 2028 } 2029 2030 icl_pdu_free(ip); 2031 ci->status = CTL_ISCSI_OK; 2032} 2033 2034#endif /* !ICL_KERNEL_PROXY */ 2035 2036static void 2037cfiscsi_ioctl_port_create(struct ctl_req *req) 2038{ 2039 struct cfiscsi_target *ct; 2040 struct ctl_port *port; 2041 const char *target, *alias, *tags; 2042 struct scsi_vpd_id_descriptor *desc; 2043 ctl_options_t opts; 2044 int retval, len, idlen; 2045 uint16_t tag; 2046 2047 ctl_init_opts(&opts, req->num_args, req->kern_args); 2048 target = ctl_get_opt(&opts, "cfiscsi_target"); 2049 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 2050 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2051 if (target == NULL || tags == NULL) { 2052 req->status = CTL_LUN_ERROR; 2053 snprintf(req->error_str, sizeof(req->error_str), 2054 "Missing required argument"); 2055 ctl_free_opts(&opts); 2056 return; 2057 } 2058 tag = strtol(tags, (char **)NULL, 10); 2059 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2060 if (ct == NULL) { 2061 req->status = CTL_LUN_ERROR; 2062 snprintf(req->error_str, sizeof(req->error_str), 2063 "failed to create target \"%s\"", target); 2064 ctl_free_opts(&opts); 2065 return; 2066 } 2067 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2068 req->status = CTL_LUN_ERROR; 2069 snprintf(req->error_str, sizeof(req->error_str), 2070 "target \"%s\" already exists", target); 2071 cfiscsi_target_release(ct); 2072 ctl_free_opts(&opts); 2073 return; 2074 } 2075 port = &ct->ct_port; 2076 // WAT 2077 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2078 goto done; 2079 2080 port->frontend = &cfiscsi_frontend; 2081 port->port_type = CTL_PORT_ISCSI; 2082 /* XXX KDM what should the real number be here? */ 2083 port->num_requested_ctl_io = 4096; 2084 port->port_name = "iscsi"; 2085 port->physical_port = tag; 2086 port->virtual_port = ct->ct_target_id; 2087 port->port_online = cfiscsi_online; 2088 port->port_offline = cfiscsi_offline; 2089 port->port_info = cfiscsi_info; 2090 port->onoff_arg = ct; 2091 port->fe_datamove = cfiscsi_datamove; 2092 port->fe_done = cfiscsi_done; 2093 2094 /* XXX KDM what should we report here? */ 2095 /* XXX These should probably be fetched from CTL. */ 2096 port->max_targets = 1; 2097 port->max_target_id = 15; 2098 port->targ_port = -1; 2099 2100 port->options = opts; 2101 STAILQ_INIT(&opts); 2102 2103 /* Generate Port ID. */ 2104 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2105 idlen = roundup2(idlen, 4); 2106 len = sizeof(struct scsi_vpd_device_id) + idlen; 2107 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2108 M_CTL, M_WAITOK | M_ZERO); 2109 port->port_devid->len = len; 2110 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2111 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2112 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2113 SVPD_ID_TYPE_SCSI_NAME; 2114 desc->length = idlen; 2115 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2116 2117 /* Generate Target ID. */ 2118 idlen = strlen(target) + 1; 2119 idlen = roundup2(idlen, 4); 2120 len = sizeof(struct scsi_vpd_device_id) + idlen; 2121 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2122 M_CTL, M_WAITOK | M_ZERO); 2123 port->target_devid->len = len; 2124 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2125 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2126 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2127 SVPD_ID_TYPE_SCSI_NAME; 2128 desc->length = idlen; 2129 strlcpy(desc->identifier, target, idlen); 2130 2131 retval = ctl_port_register(port); 2132 if (retval != 0) { 2133 ctl_free_opts(&port->options); 2134 cfiscsi_target_release(ct); 2135 free(port->port_devid, M_CFISCSI); 2136 free(port->target_devid, M_CFISCSI); 2137 req->status = CTL_LUN_ERROR; 2138 snprintf(req->error_str, sizeof(req->error_str), 2139 "ctl_port_register() failed with error %d", retval); 2140 return; 2141 } 2142done: 2143 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2144 req->status = CTL_LUN_OK; 2145 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2146 sizeof(port->targ_port)); //XXX 2147} 2148 2149static void 2150cfiscsi_ioctl_port_remove(struct ctl_req *req) 2151{ 2152 struct cfiscsi_target *ct; 2153 const char *target, *tags; 2154 ctl_options_t opts; 2155 uint16_t tag; 2156 2157 ctl_init_opts(&opts, req->num_args, req->kern_args); 2158 target = ctl_get_opt(&opts, "cfiscsi_target"); 2159 tags = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 2160 if (target == NULL || tags == NULL) { 2161 ctl_free_opts(&opts); 2162 req->status = CTL_LUN_ERROR; 2163 snprintf(req->error_str, sizeof(req->error_str), 2164 "Missing required argument"); 2165 return; 2166 } 2167 tag = strtol(tags, (char **)NULL, 10); 2168 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2169 if (ct == NULL) { 2170 ctl_free_opts(&opts); 2171 req->status = CTL_LUN_ERROR; 2172 snprintf(req->error_str, sizeof(req->error_str), 2173 "can't find target \"%s\"", target); 2174 return; 2175 } 2176 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2177 ctl_free_opts(&opts); 2178 req->status = CTL_LUN_ERROR; 2179 snprintf(req->error_str, sizeof(req->error_str), 2180 "target \"%s\" is already dying", target); 2181 return; 2182 } 2183 ctl_free_opts(&opts); 2184 2185 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2186 ctl_port_offline(&ct->ct_port); 2187 cfiscsi_target_release(ct); 2188 cfiscsi_target_release(ct); 2189 req->status = CTL_LUN_OK; 2190} 2191 2192static int 2193cfiscsi_ioctl(struct cdev *dev, 2194 u_long cmd, caddr_t addr, int flag, struct thread *td) 2195{ 2196 struct ctl_iscsi *ci; 2197 struct ctl_req *req; 2198 2199 if (cmd == CTL_PORT_REQ) { 2200 req = (struct ctl_req *)addr; 2201 switch (req->reqtype) { 2202 case CTL_REQ_CREATE: 2203 cfiscsi_ioctl_port_create(req); 2204 break; 2205 case CTL_REQ_REMOVE: 2206 cfiscsi_ioctl_port_remove(req); 2207 break; 2208 default: 2209 req->status = CTL_LUN_ERROR; 2210 snprintf(req->error_str, sizeof(req->error_str), 2211 "Unsupported request type %d", req->reqtype); 2212 } 2213 return (0); 2214 } 2215 2216 if (cmd != CTL_ISCSI) 2217 return (ENOTTY); 2218 2219 ci = (struct ctl_iscsi *)addr; 2220 switch (ci->type) { 2221 case CTL_ISCSI_HANDOFF: 2222 cfiscsi_ioctl_handoff(ci); 2223 break; 2224 case CTL_ISCSI_LIST: 2225 cfiscsi_ioctl_list(ci); 2226 break; 2227 case CTL_ISCSI_LOGOUT: 2228 cfiscsi_ioctl_logout(ci); 2229 break; 2230 case CTL_ISCSI_TERMINATE: 2231 cfiscsi_ioctl_terminate(ci); 2232 break; 2233 case CTL_ISCSI_LIMITS: 2234 cfiscsi_ioctl_limits(ci); 2235 break; 2236#ifdef ICL_KERNEL_PROXY 2237 case CTL_ISCSI_LISTEN: 2238 cfiscsi_ioctl_listen(ci); 2239 break; 2240 case CTL_ISCSI_ACCEPT: 2241 cfiscsi_ioctl_accept(ci); 2242 break; 2243 case CTL_ISCSI_SEND: 2244 cfiscsi_ioctl_send(ci); 2245 break; 2246 case CTL_ISCSI_RECEIVE: 2247 cfiscsi_ioctl_receive(ci); 2248 break; 2249#else 2250 case CTL_ISCSI_LISTEN: 2251 case CTL_ISCSI_ACCEPT: 2252 case CTL_ISCSI_SEND: 2253 case CTL_ISCSI_RECEIVE: 2254 ci->status = CTL_ISCSI_ERROR; 2255 snprintf(ci->error_str, sizeof(ci->error_str), 2256 "%s: CTL compiled without ICL_KERNEL_PROXY", 2257 __func__); 2258 break; 2259#endif /* !ICL_KERNEL_PROXY */ 2260 default: 2261 ci->status = CTL_ISCSI_ERROR; 2262 snprintf(ci->error_str, sizeof(ci->error_str), 2263 "%s: invalid iSCSI request type %d", __func__, ci->type); 2264 break; 2265 } 2266 2267 return (0); 2268} 2269 2270static void 2271cfiscsi_target_hold(struct cfiscsi_target *ct) 2272{ 2273 2274 refcount_acquire(&ct->ct_refcount); 2275} 2276 2277static void 2278cfiscsi_target_release(struct cfiscsi_target *ct) 2279{ 2280 struct cfiscsi_softc *softc; 2281 2282 softc = ct->ct_softc; 2283 mtx_lock(&softc->lock); 2284 if (refcount_release(&ct->ct_refcount)) { 2285 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2286 mtx_unlock(&softc->lock); 2287 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2288 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2289 if (ctl_port_deregister(&ct->ct_port) != 0) 2290 printf("%s: ctl_port_deregister() failed\n", 2291 __func__); 2292 } 2293 free(ct, M_CFISCSI); 2294 2295 return; 2296 } 2297 mtx_unlock(&softc->lock); 2298} 2299 2300static struct cfiscsi_target * 2301cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2302{ 2303 struct cfiscsi_target *ct; 2304 2305 mtx_lock(&softc->lock); 2306 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2307 if (ct->ct_tag != tag || 2308 strcmp(name, ct->ct_name) != 0 || 2309 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2310 continue; 2311 cfiscsi_target_hold(ct); 2312 mtx_unlock(&softc->lock); 2313 return (ct); 2314 } 2315 mtx_unlock(&softc->lock); 2316 2317 return (NULL); 2318} 2319 2320static struct cfiscsi_target * 2321cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2322 const char *alias, uint16_t tag) 2323{ 2324 struct cfiscsi_target *ct, *newct; 2325 2326 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2327 return (NULL); 2328 2329 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2330 2331 mtx_lock(&softc->lock); 2332 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2333 if (ct->ct_tag != tag || 2334 strcmp(name, ct->ct_name) != 0 || 2335 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2336 continue; 2337 cfiscsi_target_hold(ct); 2338 mtx_unlock(&softc->lock); 2339 free(newct, M_CFISCSI); 2340 return (ct); 2341 } 2342 2343 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2344 if (alias != NULL) 2345 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2346 newct->ct_tag = tag; 2347 refcount_init(&newct->ct_refcount, 1); 2348 newct->ct_softc = softc; 2349 if (TAILQ_EMPTY(&softc->targets)) 2350 softc->last_target_id = 0; 2351 newct->ct_target_id = ++softc->last_target_id; 2352 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2353 mtx_unlock(&softc->lock); 2354 2355 return (newct); 2356} 2357 2358static void 2359cfiscsi_datamove_in(union ctl_io *io) 2360{ 2361 struct cfiscsi_session *cs; 2362 struct icl_pdu *request, *response; 2363 const struct iscsi_bhs_scsi_command *bhssc; 2364 struct iscsi_bhs_data_in *bhsdi; 2365 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2366 size_t len, expected_len, sg_len, buffer_offset; 2367 const char *sg_addr; 2368 int ctl_sg_count, error, i; 2369 2370 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2371 cs = PDU_SESSION(request); 2372 2373 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2374 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2375 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2376 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2377 2378 if (io->scsiio.kern_sg_entries > 0) { 2379 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2380 ctl_sg_count = io->scsiio.kern_sg_entries; 2381 } else { 2382 ctl_sglist = &ctl_sg_entry; 2383 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2384 ctl_sglist->len = io->scsiio.kern_data_len; 2385 ctl_sg_count = 1; 2386 } 2387 2388 /* 2389 * This is the total amount of data to be transferred within the current 2390 * SCSI command. We need to record it so that we can properly report 2391 * underflow/underflow. 2392 */ 2393 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2394 2395 /* 2396 * This is the offset within the current SCSI command; for the first 2397 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2398 * it will be the sum of lengths of previous ones. 2399 */ 2400 buffer_offset = io->scsiio.kern_rel_offset; 2401 2402 /* 2403 * This is the transfer length expected by the initiator. In theory, 2404 * it could be different from the correct amount of data from the SCSI 2405 * point of view, even if that doesn't make any sense. 2406 */ 2407 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2408#if 0 2409 if (expected_len != io->scsiio.kern_total_len) { 2410 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2411 "actual length %zd", expected_len, 2412 (size_t)io->scsiio.kern_total_len); 2413 } 2414#endif 2415 2416 if (buffer_offset >= expected_len) { 2417#if 0 2418 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2419 "already sent the expected len", buffer_offset); 2420#endif 2421 io->scsiio.be_move_done(io); 2422 return; 2423 } 2424 2425 i = 0; 2426 sg_addr = NULL; 2427 sg_len = 0; 2428 response = NULL; 2429 bhsdi = NULL; 2430 for (;;) { 2431 if (response == NULL) { 2432 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2433 if (response == NULL) { 2434 CFISCSI_SESSION_WARN(cs, "failed to " 2435 "allocate memory; dropping connection"); 2436 ctl_set_busy(&io->scsiio); 2437 io->scsiio.be_move_done(io); 2438 cfiscsi_session_terminate(cs); 2439 return; 2440 } 2441 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2442 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2443 bhsdi->bhsdi_initiator_task_tag = 2444 bhssc->bhssc_initiator_task_tag; 2445 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2446 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2447 PDU_EXPDATASN(request)++; 2448 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2449 } 2450 2451 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2452 if (sg_len == 0) { 2453 sg_addr = ctl_sglist[i].addr; 2454 sg_len = ctl_sglist[i].len; 2455 KASSERT(sg_len > 0, ("sg_len <= 0")); 2456 } 2457 2458 len = sg_len; 2459 2460 /* 2461 * Truncate to maximum data segment length. 2462 */ 2463 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2464 ("ip_data_len %zd >= max_data_segment_length %zd", 2465 response->ip_data_len, cs->cs_max_data_segment_length)); 2466 if (response->ip_data_len + len > 2467 cs->cs_max_data_segment_length) { 2468 len = cs->cs_max_data_segment_length - 2469 response->ip_data_len; 2470 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2471 len, sg_len)); 2472 } 2473 2474 /* 2475 * Truncate to expected data transfer length. 2476 */ 2477 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2478 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2479 buffer_offset, response->ip_data_len, expected_len)); 2480 if (buffer_offset + response->ip_data_len + len > expected_len) { 2481 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2482 "to expected data transfer length %zd", 2483 buffer_offset + response->ip_data_len + len, expected_len); 2484 len = expected_len - (buffer_offset + response->ip_data_len); 2485 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2486 len, sg_len)); 2487 } 2488 2489 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2490 if (error != 0) { 2491 CFISCSI_SESSION_WARN(cs, "failed to " 2492 "allocate memory; dropping connection"); 2493 icl_pdu_free(response); 2494 ctl_set_busy(&io->scsiio); 2495 io->scsiio.be_move_done(io); 2496 cfiscsi_session_terminate(cs); 2497 return; 2498 } 2499 sg_addr += len; 2500 sg_len -= len; 2501 2502 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2503 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2504 buffer_offset, response->ip_data_len, expected_len)); 2505 if (buffer_offset + response->ip_data_len == expected_len) { 2506 /* 2507 * Already have the amount of data the initiator wanted. 2508 */ 2509 break; 2510 } 2511 2512 if (sg_len == 0) { 2513 /* 2514 * End of scatter-gather segment; 2515 * proceed to the next one... 2516 */ 2517 if (i == ctl_sg_count - 1) { 2518 /* 2519 * ... unless this was the last one. 2520 */ 2521 break; 2522 } 2523 i++; 2524 } 2525 2526 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2527 /* 2528 * Can't stuff more data into the current PDU; 2529 * queue it. Note that's not enough to check 2530 * for kern_data_resid == 0 instead; there 2531 * may be several Data-In PDUs for the final 2532 * call to cfiscsi_datamove(), and we want 2533 * to set the F flag only on the last of them. 2534 */ 2535 buffer_offset += response->ip_data_len; 2536 if (buffer_offset == io->scsiio.kern_total_len || 2537 buffer_offset == expected_len) { 2538 buffer_offset -= response->ip_data_len; 2539 break; 2540 } 2541 cfiscsi_pdu_queue(response); 2542 response = NULL; 2543 bhsdi = NULL; 2544 } 2545 } 2546 if (response != NULL) { 2547 buffer_offset += response->ip_data_len; 2548 if (buffer_offset == io->scsiio.kern_total_len || 2549 buffer_offset == expected_len) { 2550 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2551 if (io->io_hdr.status == CTL_SUCCESS) { 2552 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2553 if (PDU_TOTAL_TRANSFER_LEN(request) < 2554 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2555 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2556 bhsdi->bhsdi_residual_count = 2557 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2558 PDU_TOTAL_TRANSFER_LEN(request)); 2559 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2560 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2561 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2562 bhsdi->bhsdi_residual_count = 2563 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2564 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2565 } 2566 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2567 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2568 } 2569 } 2570 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2571 cfiscsi_pdu_queue(response); 2572 } 2573 2574 io->scsiio.be_move_done(io); 2575} 2576 2577static void 2578cfiscsi_datamove_out(union ctl_io *io) 2579{ 2580 struct cfiscsi_session *cs; 2581 struct icl_pdu *request, *response; 2582 const struct iscsi_bhs_scsi_command *bhssc; 2583 struct iscsi_bhs_r2t *bhsr2t; 2584 struct cfiscsi_data_wait *cdw; 2585 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2586 uint32_t expected_len, r2t_off, r2t_len; 2587 uint32_t target_transfer_tag; 2588 bool done; 2589 2590 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2591 cs = PDU_SESSION(request); 2592 2593 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2594 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2595 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2596 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2597 2598 /* 2599 * We need to record it so that we can properly report 2600 * underflow/underflow. 2601 */ 2602 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2603 2604 /* 2605 * Report write underflow as error since CTL and backends don't 2606 * really support it, and SCSI does not tell how to do it right. 2607 */ 2608 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2609 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2610 expected_len) { 2611 io->scsiio.io_hdr.port_status = 43; 2612 io->scsiio.be_move_done(io); 2613 return; 2614 } 2615 2616 target_transfer_tag = 2617 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2618 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2619 &target_transfer_tag); 2620 if (cdw == NULL) { 2621 CFISCSI_SESSION_WARN(cs, "failed to " 2622 "allocate memory; dropping connection"); 2623 ctl_set_busy(&io->scsiio); 2624 io->scsiio.be_move_done(io); 2625 cfiscsi_session_terminate(cs); 2626 return; 2627 } 2628#if 0 2629 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2630 "task tag 0x%x, target transfer tag 0x%x", 2631 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2632#endif 2633 2634 cdw->cdw_ctl_io = io; 2635 cdw->cdw_target_transfer_tag = target_transfer_tag; 2636 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2637 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2638 cdw->cdw_datasn = 0; 2639 2640 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2641 if (io->scsiio.kern_sg_entries > 0) { 2642 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2643 } else { 2644 ctl_sglist = &ctl_sg_entry; 2645 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2646 ctl_sglist->len = io->scsiio.kern_data_len; 2647 } 2648 cdw->cdw_sg_index = 0; 2649 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2650 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2651 r2t_off = io->scsiio.ext_data_filled; 2652 while (r2t_off > 0) { 2653 if (r2t_off >= cdw->cdw_sg_len) { 2654 r2t_off -= cdw->cdw_sg_len; 2655 cdw->cdw_sg_index++; 2656 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2657 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2658 continue; 2659 } 2660 cdw->cdw_sg_addr += r2t_off; 2661 cdw->cdw_sg_len -= r2t_off; 2662 r2t_off = 0; 2663 } 2664 2665 if (cs->cs_immediate_data && 2666 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2667 icl_pdu_data_segment_length(request)) { 2668 done = cfiscsi_handle_data_segment(request, cdw); 2669 if (done) { 2670 cfiscsi_data_wait_free(cs, cdw); 2671 io->scsiio.be_move_done(io); 2672 return; 2673 } 2674 } 2675 2676 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2677 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2678 cs->cs_max_burst_length); 2679 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2680 2681 CFISCSI_SESSION_LOCK(cs); 2682 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2683 CFISCSI_SESSION_UNLOCK(cs); 2684 2685 /* 2686 * XXX: We should limit the number of outstanding R2T PDUs 2687 * per task to MaxOutstandingR2T. 2688 */ 2689 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2690 if (response == NULL) { 2691 CFISCSI_SESSION_WARN(cs, "failed to " 2692 "allocate memory; dropping connection"); 2693 ctl_set_busy(&io->scsiio); 2694 io->scsiio.be_move_done(io); 2695 cfiscsi_session_terminate(cs); 2696 return; 2697 } 2698 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2699 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2700 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2701 bhsr2t->bhsr2t_flags = 0x80; 2702 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2703 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2704 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2705 /* 2706 * XXX: Here we assume that cfiscsi_datamove() won't ever 2707 * be running concurrently on several CPUs for a given 2708 * command. 2709 */ 2710 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2711 PDU_R2TSN(request)++; 2712 /* 2713 * This is the offset within the current SCSI command; 2714 * i.e. for the first call of datamove(), it will be 0, 2715 * and for subsequent ones it will be the sum of lengths 2716 * of previous ones. 2717 * 2718 * The ext_data_filled is to account for unsolicited 2719 * (immediate) data that might have already arrived. 2720 */ 2721 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2722 /* 2723 * This is the total length (sum of S/G lengths) this call 2724 * to cfiscsi_datamove() is supposed to handle, limited by 2725 * MaxBurstLength. 2726 */ 2727 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2728 cfiscsi_pdu_queue(response); 2729} 2730 2731static void 2732cfiscsi_datamove(union ctl_io *io) 2733{ 2734 2735 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2736 cfiscsi_datamove_in(io); 2737 else { 2738 /* We hadn't received anything during this datamove yet. */ 2739 io->scsiio.ext_data_filled = 0; 2740 cfiscsi_datamove_out(io); 2741 } 2742} 2743 2744static void 2745cfiscsi_scsi_command_done(union ctl_io *io) 2746{ 2747 struct icl_pdu *request, *response; 2748 struct iscsi_bhs_scsi_command *bhssc; 2749 struct iscsi_bhs_scsi_response *bhssr; 2750#ifdef DIAGNOSTIC 2751 struct cfiscsi_data_wait *cdw; 2752#endif 2753 struct cfiscsi_session *cs; 2754 uint16_t sense_length; 2755 2756 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2757 cs = PDU_SESSION(request); 2758 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2759 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2760 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2761 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2762 2763 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2764 // bhssc->bhssc_initiator_task_tag); 2765 2766#ifdef DIAGNOSTIC 2767 CFISCSI_SESSION_LOCK(cs); 2768 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2769 KASSERT(bhssc->bhssc_initiator_task_tag != 2770 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2771 CFISCSI_SESSION_UNLOCK(cs); 2772#endif 2773 2774 /* 2775 * Do not return status for aborted commands. 2776 * There are exceptions, but none supported by CTL yet. 2777 */ 2778 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2779 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2780 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2781 ctl_free_io(io); 2782 icl_pdu_free(request); 2783 return; 2784 } 2785 2786 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2787 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2788 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2789 bhssr->bhssr_flags = 0x80; 2790 /* 2791 * XXX: We don't deal with bidirectional under/overflows; 2792 * does anything actually support those? 2793 */ 2794 if (PDU_TOTAL_TRANSFER_LEN(request) < 2795 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2796 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2797 bhssr->bhssr_residual_count = 2798 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2799 PDU_TOTAL_TRANSFER_LEN(request)); 2800 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2801 // ntohl(bhssr->bhssr_residual_count)); 2802 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2803 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2804 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2805 bhssr->bhssr_residual_count = 2806 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2807 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2808 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2809 // ntohl(bhssr->bhssr_residual_count)); 2810 } 2811 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2812 bhssr->bhssr_status = io->scsiio.scsi_status; 2813 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2814 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2815 2816 if (io->scsiio.sense_len > 0) { 2817#if 0 2818 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2819 io->scsiio.sense_len); 2820#endif 2821 sense_length = htons(io->scsiio.sense_len); 2822 icl_pdu_append_data(response, 2823 &sense_length, sizeof(sense_length), M_WAITOK); 2824 icl_pdu_append_data(response, 2825 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2826 } 2827 2828 ctl_free_io(io); 2829 icl_pdu_free(request); 2830 cfiscsi_pdu_queue(response); 2831} 2832 2833static void 2834cfiscsi_task_management_done(union ctl_io *io) 2835{ 2836 struct icl_pdu *request, *response; 2837 struct iscsi_bhs_task_management_request *bhstmr; 2838 struct iscsi_bhs_task_management_response *bhstmr2; 2839 struct cfiscsi_data_wait *cdw, *tmpcdw; 2840 struct cfiscsi_session *cs, *tcs; 2841 struct cfiscsi_softc *softc; 2842 int cold_reset = 0; 2843 2844 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2845 cs = PDU_SESSION(request); 2846 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2847 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2848 ISCSI_BHS_OPCODE_TASK_REQUEST, 2849 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2850 2851#if 0 2852 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2853 bhstmr->bhstmr_initiator_task_tag, 2854 bhstmr->bhstmr_referenced_task_tag); 2855#endif 2856 2857 if ((bhstmr->bhstmr_function & ~0x80) == 2858 BHSTMR_FUNCTION_ABORT_TASK) { 2859 /* 2860 * Make sure we no longer wait for Data-Out for this command. 2861 */ 2862 CFISCSI_SESSION_LOCK(cs); 2863 TAILQ_FOREACH_SAFE(cdw, 2864 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2865 if (bhstmr->bhstmr_referenced_task_tag != 2866 cdw->cdw_initiator_task_tag) 2867 continue; 2868 2869#if 0 2870 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2871 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2872#endif 2873 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2874 cdw, cdw_next); 2875 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2876 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2877 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2878 cfiscsi_data_wait_free(cs, cdw); 2879 } 2880 CFISCSI_SESSION_UNLOCK(cs); 2881 } 2882 if ((bhstmr->bhstmr_function & ~0x80) == 2883 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2884 io->io_hdr.status == CTL_SUCCESS) 2885 cold_reset = 1; 2886 2887 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2888 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2889 response->ip_bhs; 2890 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2891 bhstmr2->bhstmr_flags = 0x80; 2892 switch (io->taskio.task_status) { 2893 case CTL_TASK_FUNCTION_COMPLETE: 2894 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2895 break; 2896 case CTL_TASK_FUNCTION_SUCCEEDED: 2897 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2898 break; 2899 case CTL_TASK_LUN_DOES_NOT_EXIST: 2900 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2901 break; 2902 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2903 default: 2904 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2905 break; 2906 } 2907 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2908 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2909 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2910 2911 ctl_free_io(io); 2912 icl_pdu_free(request); 2913 cfiscsi_pdu_queue(response); 2914 2915 if (cold_reset) { 2916 softc = cs->cs_target->ct_softc; 2917 mtx_lock(&softc->lock); 2918 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2919 if (tcs->cs_target == cs->cs_target) 2920 cfiscsi_session_terminate(tcs); 2921 } 2922 mtx_unlock(&softc->lock); 2923 } 2924} 2925 2926static void 2927cfiscsi_done(union ctl_io *io) 2928{ 2929 struct icl_pdu *request; 2930 struct cfiscsi_session *cs; 2931 2932 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2933 ("invalid CTL status %#x", io->io_hdr.status)); 2934 2935 if (io->io_hdr.io_type == CTL_IO_TASK && 2936 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2937 /* 2938 * Implicit task termination has just completed; nothing to do. 2939 */ 2940 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2941 cs->cs_tasks_aborted = true; 2942 refcount_release(&cs->cs_outstanding_ctl_pdus); 2943 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2944 ctl_free_io(io); 2945 return; 2946 } 2947 2948 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2949 cs = PDU_SESSION(request); 2950 refcount_release(&cs->cs_outstanding_ctl_pdus); 2951 2952 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2953 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2954 cfiscsi_scsi_command_done(io); 2955 break; 2956 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2957 cfiscsi_task_management_done(io); 2958 break; 2959 default: 2960 panic("cfiscsi_done called with wrong opcode 0x%x", 2961 request->ip_bhs->bhs_opcode); 2962 } 2963} 2964