ctl_frontend_iscsi.c revision 269296
1/*- 2 * Copyright (c) 2012 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 269296 2014-07-30 07:18:32Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 269296 2014-07-30 07:18:32Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capability.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include "../../dev/iscsi/icl.h" 71#include "../../dev/iscsi/iscsi_proto.h" 72#include "ctl_frontend_iscsi.h" 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 3; 88TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95static int login_timeout = 60; 96TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99static int maxcmdsn_delta = 256; 100TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105#define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113#define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130#define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145#define PDU_EXPDATASN(X) (X)->ip_prv0 146#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147#define PDU_R2TSN(X) (X)->ip_prv2 148 149int cfiscsi_init(void); 150static void cfiscsi_online(void *arg); 151static void cfiscsi_offline(void *arg); 152static int cfiscsi_info(void *arg, struct sbuf *sb); 153static int cfiscsi_lun_enable(void *arg, 154 struct ctl_id target_id, int lun_id); 155static int cfiscsi_lun_disable(void *arg, 156 struct ctl_id target_id, int lun_id); 157static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 158static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160static void cfiscsi_datamove(union ctl_io *io); 161static void cfiscsi_done(union ctl_io *io); 162static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 163static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 164static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 165static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 168static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 169static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 170 *softc, const char *name); 171static struct cfiscsi_target *cfiscsi_target_find_or_create( 172 struct cfiscsi_softc *softc, const char *name, const char *alias); 173static void cfiscsi_target_release(struct cfiscsi_target *ct); 174static void cfiscsi_session_delete(struct cfiscsi_session *cs); 175 176static struct cfiscsi_softc cfiscsi_softc; 177extern struct ctl_softc *control_softc; 178 179static struct ctl_frontend cfiscsi_frontend = 180{ 181 .name = "iscsi", 182 .init = cfiscsi_init, 183 .ioctl = cfiscsi_ioctl, 184}; 185CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 186MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 187 188static struct icl_pdu * 189cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 190{ 191 192 return (icl_pdu_new_bhs(request->ip_conn, flags)); 193} 194 195static bool 196cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 197{ 198 const struct iscsi_bhs_scsi_command *bhssc; 199 struct cfiscsi_session *cs; 200 uint32_t cmdsn, expstatsn; 201 202 cs = PDU_SESSION(request); 203 204 /* 205 * Every incoming PDU - not just NOP-Out - resets the ping timer. 206 * The purpose of the timeout is to reset the connection when it stalls; 207 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 208 * in some queue. 209 * 210 * XXX: Locking? 211 */ 212 cs->cs_timeout = 0; 213 214 /* 215 * Data-Out PDUs don't contain CmdSN. 216 */ 217 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 218 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 219 return (false); 220 221 /* 222 * We're only using fields common for all the request 223 * (initiator -> target) PDUs. 224 */ 225 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 226 cmdsn = ntohl(bhssc->bhssc_cmdsn); 227 expstatsn = ntohl(bhssc->bhssc_expstatsn); 228 229 CFISCSI_SESSION_LOCK(cs); 230#if 0 231 if (expstatsn != cs->cs_statsn) { 232 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 233 "while current StatSN is %d", expstatsn, 234 cs->cs_statsn); 235 } 236#endif 237 238 /* 239 * The target MUST silently ignore any non-immediate command outside 240 * of this range. 241 */ 242 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 243 CFISCSI_SESSION_UNLOCK(cs); 244 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 245 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 246 return (true); 247 } 248 249 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 250 cs->cs_cmdsn++; 251 252 CFISCSI_SESSION_UNLOCK(cs); 253 254 return (false); 255} 256 257static void 258cfiscsi_pdu_handle(struct icl_pdu *request) 259{ 260 struct cfiscsi_session *cs; 261 bool ignore; 262 263 cs = PDU_SESSION(request); 264 265 ignore = cfiscsi_pdu_update_cmdsn(request); 266 if (ignore) { 267 icl_pdu_free(request); 268 return; 269 } 270 271 /* 272 * Handle the PDU; this includes e.g. receiving the remaining 273 * part of PDU and submitting the SCSI command to CTL 274 * or queueing a reply. The handling routine is responsible 275 * for freeing the PDU when it's no longer needed. 276 */ 277 switch (request->ip_bhs->bhs_opcode & 278 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 279 case ISCSI_BHS_OPCODE_NOP_OUT: 280 cfiscsi_pdu_handle_nop_out(request); 281 break; 282 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 283 cfiscsi_pdu_handle_scsi_command(request); 284 break; 285 case ISCSI_BHS_OPCODE_TASK_REQUEST: 286 cfiscsi_pdu_handle_task_request(request); 287 break; 288 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 289 cfiscsi_pdu_handle_data_out(request); 290 break; 291 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 292 cfiscsi_pdu_handle_logout_request(request); 293 break; 294 default: 295 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 296 "opcode 0x%x; dropping connection", 297 request->ip_bhs->bhs_opcode); 298 icl_pdu_free(request); 299 cfiscsi_session_terminate(cs); 300 } 301 302} 303 304static void 305cfiscsi_receive_callback(struct icl_pdu *request) 306{ 307 struct cfiscsi_session *cs; 308 309 cs = PDU_SESSION(request); 310 311#ifdef ICL_KERNEL_PROXY 312 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 313 if (cs->cs_login_pdu == NULL) 314 cs->cs_login_pdu = request; 315 else 316 icl_pdu_free(request); 317 cv_signal(&cs->cs_login_cv); 318 return; 319 } 320#endif 321 322 cfiscsi_pdu_handle(request); 323} 324 325static void 326cfiscsi_error_callback(struct icl_conn *ic) 327{ 328 struct cfiscsi_session *cs; 329 330 cs = CONN_SESSION(ic); 331 332 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 333 cfiscsi_session_terminate(cs); 334} 335 336static int 337cfiscsi_pdu_prepare(struct icl_pdu *response) 338{ 339 struct cfiscsi_session *cs; 340 struct iscsi_bhs_scsi_response *bhssr; 341 bool advance_statsn = true; 342 343 cs = PDU_SESSION(response); 344 345 CFISCSI_SESSION_LOCK_ASSERT(cs); 346 347 /* 348 * We're only using fields common for all the response 349 * (target -> initiator) PDUs. 350 */ 351 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 352 353 /* 354 * 10.8.3: "The StatSN for this connection is not advanced 355 * after this PDU is sent." 356 */ 357 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 358 advance_statsn = false; 359 360 /* 361 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 362 * StatSN for the connection is not advanced after this PDU is sent." 363 */ 364 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 365 bhssr->bhssr_initiator_task_tag == 0xffffffff) 366 advance_statsn = false; 367 368 /* 369 * See the comment below - StatSN is not meaningful and must 370 * not be advanced. 371 */ 372 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 373 advance_statsn = false; 374 375 /* 376 * 10.7.3: "The fields StatSN, Status, and Residual Count 377 * only have meaningful content if the S bit is set to 1." 378 */ 379 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 380 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 381 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 382 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 383 384 if (advance_statsn) 385 cs->cs_statsn++; 386 387 return (0); 388} 389 390static void 391cfiscsi_pdu_queue(struct icl_pdu *response) 392{ 393 struct cfiscsi_session *cs; 394 395 cs = PDU_SESSION(response); 396 397 CFISCSI_SESSION_LOCK(cs); 398 cfiscsi_pdu_prepare(response); 399 icl_pdu_queue(response); 400 CFISCSI_SESSION_UNLOCK(cs); 401} 402 403static uint32_t 404cfiscsi_decode_lun(uint64_t encoded) 405{ 406 uint8_t lun[8]; 407 uint32_t result; 408 409 /* 410 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 411 * but is in fact an evil, multidimensional structure defined 412 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 413 */ 414 memcpy(lun, &encoded, sizeof(lun)); 415 switch (lun[0] & 0xC0) { 416 case 0x00: 417 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 418 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 419 CFISCSI_WARN("malformed LUN " 420 "(peripheral device addressing method): 0x%jx", 421 (uintmax_t)encoded); 422 result = 0xffffffff; 423 break; 424 } 425 result = lun[1]; 426 break; 427 case 0x40: 428 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 429 lun[6] != 0 || lun[7] != 0) { 430 CFISCSI_WARN("malformed LUN " 431 "(flat address space addressing method): 0x%jx", 432 (uintmax_t)encoded); 433 result = 0xffffffff; 434 break; 435 } 436 result = ((lun[0] & 0x3f) << 8) + lun[1]; 437 break; 438 case 0xC0: 439 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 440 lun[6] != 0 || lun[7] != 0) { 441 CFISCSI_WARN("malformed LUN (extended flat " 442 "address space addressing method): 0x%jx", 443 (uintmax_t)encoded); 444 result = 0xffffffff; 445 break; 446 } 447 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 448 default: 449 CFISCSI_WARN("unsupported LUN format 0x%jx", 450 (uintmax_t)encoded); 451 result = 0xffffffff; 452 break; 453 } 454 455 return (result); 456} 457 458static void 459cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 460{ 461 struct cfiscsi_session *cs; 462 struct iscsi_bhs_nop_out *bhsno; 463 struct iscsi_bhs_nop_in *bhsni; 464 struct icl_pdu *response; 465 void *data = NULL; 466 size_t datasize; 467 int error; 468 469 cs = PDU_SESSION(request); 470 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 471 472 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 473 /* 474 * Nothing to do, iscsi_pdu_update_statsn() already 475 * zeroed the timeout. 476 */ 477 icl_pdu_free(request); 478 return; 479 } 480 481 datasize = icl_pdu_data_segment_length(request); 482 if (datasize > 0) { 483 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 484 if (data == NULL) { 485 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 486 "dropping connection"); 487 icl_pdu_free(request); 488 cfiscsi_session_terminate(cs); 489 return; 490 } 491 icl_pdu_get_data(request, 0, data, datasize); 492 } 493 494 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 495 if (response == NULL) { 496 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 497 "droppping connection"); 498 free(data, M_CFISCSI); 499 icl_pdu_free(request); 500 cfiscsi_session_terminate(cs); 501 return; 502 } 503 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 504 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 505 bhsni->bhsni_flags = 0x80; 506 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 507 bhsni->bhsni_target_transfer_tag = 0xffffffff; 508 if (datasize > 0) { 509 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 510 if (error != 0) { 511 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 512 "dropping connection"); 513 free(data, M_CFISCSI); 514 icl_pdu_free(request); 515 icl_pdu_free(response); 516 cfiscsi_session_terminate(cs); 517 return; 518 } 519 free(data, M_CFISCSI); 520 } 521 522 icl_pdu_free(request); 523 cfiscsi_pdu_queue(response); 524} 525 526static void 527cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 528{ 529 struct iscsi_bhs_scsi_command *bhssc; 530 struct cfiscsi_session *cs; 531 union ctl_io *io; 532 int error; 533 534 cs = PDU_SESSION(request); 535 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 536 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 537 // bhssc->bhssc_initiator_task_tag); 538 539 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 540 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 541 "ImmediateData=No; dropping connection"); 542 icl_pdu_free(request); 543 cfiscsi_session_terminate(cs); 544 return; 545 } 546 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 547 if (io == NULL) { 548 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 549 "dropping connection"); 550 icl_pdu_free(request); 551 cfiscsi_session_terminate(cs); 552 return; 553 } 554 ctl_zero_io(io); 555 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 556 io->io_hdr.io_type = CTL_IO_SCSI; 557 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 558 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 559 io->io_hdr.nexus.targ_target.id = 0; 560 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 561 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 562 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 563 case BHSSC_FLAGS_ATTR_UNTAGGED: 564 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 565 break; 566 case BHSSC_FLAGS_ATTR_SIMPLE: 567 io->scsiio.tag_type = CTL_TAG_SIMPLE; 568 break; 569 case BHSSC_FLAGS_ATTR_ORDERED: 570 io->scsiio.tag_type = CTL_TAG_ORDERED; 571 break; 572 case BHSSC_FLAGS_ATTR_HOQ: 573 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 574 break; 575 case BHSSC_FLAGS_ATTR_ACA: 576 io->scsiio.tag_type = CTL_TAG_ACA; 577 break; 578 default: 579 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 580 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 581 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 582 break; 583 } 584 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 585 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 586 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 587 error = ctl_queue(io); 588 if (error != CTL_RETVAL_COMPLETE) { 589 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 590 "dropping connection", error); 591 ctl_free_io(io); 592 refcount_release(&cs->cs_outstanding_ctl_pdus); 593 icl_pdu_free(request); 594 cfiscsi_session_terminate(cs); 595 } 596} 597 598static void 599cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 600{ 601 struct iscsi_bhs_task_management_request *bhstmr; 602 struct iscsi_bhs_task_management_response *bhstmr2; 603 struct icl_pdu *response; 604 struct cfiscsi_session *cs; 605 union ctl_io *io; 606 int error; 607 608 cs = PDU_SESSION(request); 609 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 610 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 611 if (io == NULL) { 612 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 613 "dropping connection"); 614 icl_pdu_free(request); 615 cfiscsi_session_terminate(cs); 616 return; 617 } 618 ctl_zero_io(io); 619 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 620 io->io_hdr.io_type = CTL_IO_TASK; 621 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 622 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 623 io->io_hdr.nexus.targ_target.id = 0; 624 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 625 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 626 627 switch (bhstmr->bhstmr_function & ~0x80) { 628 case BHSTMR_FUNCTION_ABORT_TASK: 629#if 0 630 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 631#endif 632 io->taskio.task_action = CTL_TASK_ABORT_TASK; 633 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 634 break; 635 case BHSTMR_FUNCTION_ABORT_TASK_SET: 636#if 0 637 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 638#endif 639 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 640 break; 641 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 642#if 0 643 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 644#endif 645 io->taskio.task_action = CTL_TASK_LUN_RESET; 646 break; 647 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 648#if 0 649 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 650#endif 651 io->taskio.task_action = CTL_TASK_TARGET_RESET; 652 break; 653 default: 654 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 655 bhstmr->bhstmr_function & ~0x80); 656 ctl_free_io(io); 657 658 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 659 if (response == NULL) { 660 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 661 "dropping connection"); 662 icl_pdu_free(request); 663 cfiscsi_session_terminate(cs); 664 return; 665 } 666 bhstmr2 = (struct iscsi_bhs_task_management_response *) 667 response->ip_bhs; 668 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 669 bhstmr2->bhstmr_flags = 0x80; 670 bhstmr2->bhstmr_response = 671 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 672 bhstmr2->bhstmr_initiator_task_tag = 673 bhstmr->bhstmr_initiator_task_tag; 674 icl_pdu_free(request); 675 cfiscsi_pdu_queue(response); 676 return; 677 } 678 679 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 680 error = ctl_queue(io); 681 if (error != CTL_RETVAL_COMPLETE) { 682 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 683 "dropping connection", error); 684 ctl_free_io(io); 685 refcount_release(&cs->cs_outstanding_ctl_pdus); 686 icl_pdu_free(request); 687 cfiscsi_session_terminate(cs); 688 } 689} 690 691static bool 692cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 693{ 694 struct iscsi_bhs_data_out *bhsdo; 695 struct cfiscsi_session *cs; 696 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 697 size_t copy_len, len, off, buffer_offset; 698 int ctl_sg_count; 699 union ctl_io *io; 700 701 cs = PDU_SESSION(request); 702 703 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 704 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 705 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 706 ISCSI_BHS_OPCODE_SCSI_COMMAND, 707 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 708 709 /* 710 * We're only using fields common for Data-Out and SCSI Command PDUs. 711 */ 712 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 713 714 io = cdw->cdw_ctl_io; 715 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 716 ("CTL_FLAG_DATA_IN")); 717 718#if 0 719 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 720 request->ip_data_len, io->scsiio.kern_total_len); 721#endif 722 723 if (io->scsiio.kern_sg_entries > 0) { 724 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 725 ctl_sg_count = io->scsiio.kern_sg_entries; 726 } else { 727 ctl_sglist = &ctl_sg_entry; 728 ctl_sglist->addr = io->scsiio.kern_data_ptr; 729 ctl_sglist->len = io->scsiio.kern_data_len; 730 ctl_sg_count = 1; 731 } 732 733 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 734 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 735 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 736 else 737 buffer_offset = 0; 738 len = icl_pdu_data_segment_length(request); 739 740 /* 741 * Make sure the offset, as sent by the initiator, matches the offset 742 * we're supposed to be at in the scatter-gather list. 743 */ 744 if (buffer_offset > 745 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 746 buffer_offset + len <= 747 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 748 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 749 "expected %zd; dropping connection", buffer_offset, 750 (size_t)io->scsiio.kern_rel_offset + 751 (size_t)io->scsiio.ext_data_filled); 752 ctl_set_data_phase_error(&io->scsiio); 753 cfiscsi_session_terminate(cs); 754 return (true); 755 } 756 757 /* 758 * This is the offset within the PDU data segment, as opposed 759 * to buffer_offset, which is the offset within the task (SCSI 760 * command). 761 */ 762 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 763 buffer_offset; 764 765 /* 766 * Iterate over the scatter/gather segments, filling them with data 767 * from the PDU data segment. Note that this can get called multiple 768 * times for one SCSI command; the cdw structure holds state for the 769 * scatter/gather list. 770 */ 771 for (;;) { 772 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 773 ("cdw->cdw_sg_index >= ctl_sg_count")); 774 if (cdw->cdw_sg_len == 0) { 775 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 776 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 777 } 778 KASSERT(off <= len, ("len > off")); 779 copy_len = len - off; 780 if (copy_len > cdw->cdw_sg_len) 781 copy_len = cdw->cdw_sg_len; 782 783 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 784 cdw->cdw_sg_addr += copy_len; 785 cdw->cdw_sg_len -= copy_len; 786 off += copy_len; 787 io->scsiio.ext_data_filled += copy_len; 788 789 if (cdw->cdw_sg_len == 0) { 790 /* 791 * End of current segment. 792 */ 793 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 794 /* 795 * Last segment in scatter/gather list. 796 */ 797 break; 798 } 799 cdw->cdw_sg_index++; 800 } 801 802 if (off == len) { 803 /* 804 * End of PDU payload. 805 */ 806 break; 807 } 808 } 809 810 if (len > off) { 811 /* 812 * In case of unsolicited data, it's possible that the buffer 813 * provided by CTL is smaller than negotiated FirstBurstLength. 814 * Just ignore the superfluous data; will ask for them with R2T 815 * on next call to cfiscsi_datamove(). 816 * 817 * This obviously can only happen with SCSI Command PDU. 818 */ 819 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 820 ISCSI_BHS_OPCODE_SCSI_COMMAND) 821 return (true); 822 823 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 824 "expected %zd; dropping connection", 825 icl_pdu_data_segment_length(request), off); 826 ctl_set_data_phase_error(&io->scsiio); 827 cfiscsi_session_terminate(cs); 828 return (true); 829 } 830 831 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len && 832 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 833 CFISCSI_SESSION_WARN(cs, "got the final packet without " 834 "the F flag; flags = 0x%x; dropping connection", 835 bhsdo->bhsdo_flags); 836 ctl_set_data_phase_error(&io->scsiio); 837 cfiscsi_session_terminate(cs); 838 return (true); 839 } 840 841 if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len && 842 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 843 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 844 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 845 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 846 "transmitted size was %zd bytes instead of %d; " 847 "dropping connection", 848 (size_t)io->scsiio.ext_data_filled, 849 io->scsiio.kern_data_len); 850 ctl_set_data_phase_error(&io->scsiio); 851 cfiscsi_session_terminate(cs); 852 return (true); 853 } else { 854 /* 855 * For SCSI Command PDU, this just means we need to 856 * solicit more data by sending R2T. 857 */ 858 return (false); 859 } 860 } 861 862 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) { 863#if 0 864 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 865 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 866#endif 867 868 return (true); 869 } 870 871 return (false); 872} 873 874static void 875cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 876{ 877 struct iscsi_bhs_data_out *bhsdo; 878 struct cfiscsi_session *cs; 879 struct cfiscsi_data_wait *cdw = NULL; 880 union ctl_io *io; 881 bool done; 882 883 cs = PDU_SESSION(request); 884 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 885 886 CFISCSI_SESSION_LOCK(cs); 887 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 888#if 0 889 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 890 "ttt 0x%x, itt 0x%x", 891 bhsdo->bhsdo_target_transfer_tag, 892 bhsdo->bhsdo_initiator_task_tag, 893 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 894#endif 895 if (bhsdo->bhsdo_target_transfer_tag == 896 cdw->cdw_target_transfer_tag) 897 break; 898 } 899 CFISCSI_SESSION_UNLOCK(cs); 900 if (cdw == NULL) { 901 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 902 "0x%x, not found; dropping connection", 903 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 904 icl_pdu_free(request); 905 cfiscsi_session_terminate(cs); 906 return; 907 } 908 909 io = cdw->cdw_ctl_io; 910 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 911 ("CTL_FLAG_DATA_IN")); 912 913 done = cfiscsi_handle_data_segment(request, cdw); 914 if (done) { 915 CFISCSI_SESSION_LOCK(cs); 916 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 917 CFISCSI_SESSION_UNLOCK(cs); 918 uma_zfree(cfiscsi_data_wait_zone, cdw); 919 io->scsiio.be_move_done(io); 920 } 921 922 icl_pdu_free(request); 923} 924 925static void 926cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 927{ 928 struct iscsi_bhs_logout_request *bhslr; 929 struct iscsi_bhs_logout_response *bhslr2; 930 struct icl_pdu *response; 931 struct cfiscsi_session *cs; 932 933 cs = PDU_SESSION(request); 934 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 935 switch (bhslr->bhslr_reason & 0x7f) { 936 case BHSLR_REASON_CLOSE_SESSION: 937 case BHSLR_REASON_CLOSE_CONNECTION: 938 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 939 if (response == NULL) { 940 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 941 icl_pdu_free(request); 942 cfiscsi_session_terminate(cs); 943 return; 944 } 945 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 946 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 947 bhslr2->bhslr_flags = 0x80; 948 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 949 bhslr2->bhslr_initiator_task_tag = 950 bhslr->bhslr_initiator_task_tag; 951 icl_pdu_free(request); 952 cfiscsi_pdu_queue(response); 953 cfiscsi_session_terminate(cs); 954 break; 955 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 956 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 957 if (response == NULL) { 958 CFISCSI_SESSION_WARN(cs, 959 "failed to allocate memory; dropping connection"); 960 icl_pdu_free(request); 961 cfiscsi_session_terminate(cs); 962 return; 963 } 964 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 965 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 966 bhslr2->bhslr_flags = 0x80; 967 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 968 bhslr2->bhslr_initiator_task_tag = 969 bhslr->bhslr_initiator_task_tag; 970 icl_pdu_free(request); 971 cfiscsi_pdu_queue(response); 972 break; 973 default: 974 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 975 bhslr->bhslr_reason); 976 icl_pdu_free(request); 977 cfiscsi_session_terminate(cs); 978 break; 979 } 980} 981 982static void 983cfiscsi_callout(void *context) 984{ 985 struct icl_pdu *cp; 986 struct iscsi_bhs_nop_in *bhsni; 987 struct cfiscsi_session *cs; 988 989 cs = context; 990 991 if (cs->cs_terminating) 992 return; 993 994 callout_schedule(&cs->cs_callout, 1 * hz); 995 996 atomic_add_int(&cs->cs_timeout, 1); 997 998#ifdef ICL_KERNEL_PROXY 999 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1000 if (cs->cs_timeout > login_timeout) { 1001 CFISCSI_SESSION_WARN(cs, "login timed out after " 1002 "%d seconds; dropping connection", cs->cs_timeout); 1003 cfiscsi_session_terminate(cs); 1004 } 1005 return; 1006 } 1007#endif 1008 1009 if (cs->cs_timeout >= ping_timeout) { 1010 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1011 "dropping connection", ping_timeout); 1012 cfiscsi_session_terminate(cs); 1013 return; 1014 } 1015 1016 /* 1017 * If the ping was reset less than one second ago - which means 1018 * that we've received some PDU during the last second - assume 1019 * the traffic flows correctly and don't bother sending a NOP-Out. 1020 * 1021 * (It's 2 - one for one second, and one for incrementing is_timeout 1022 * earlier in this routine.) 1023 */ 1024 if (cs->cs_timeout < 2) 1025 return; 1026 1027 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1028 if (cp == NULL) { 1029 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1030 return; 1031 } 1032 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1033 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1034 bhsni->bhsni_flags = 0x80; 1035 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1036 1037 cfiscsi_pdu_queue(cp); 1038} 1039 1040static void 1041cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1042{ 1043 struct cfiscsi_data_wait *cdw; 1044 union ctl_io *io; 1045 int error, last; 1046 1047 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1048 if (io == NULL) { 1049 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1050 return; 1051 } 1052 ctl_zero_io(io); 1053 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1054 io->io_hdr.io_type = CTL_IO_TASK; 1055 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1056 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1057 io->io_hdr.nexus.targ_target.id = 0; 1058 io->io_hdr.nexus.targ_lun = 0; 1059 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1060 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1061 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1062 error = ctl_queue(io); 1063 if (error != CTL_RETVAL_COMPLETE) { 1064 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1065 refcount_release(&cs->cs_outstanding_ctl_pdus); 1066 ctl_free_io(io); 1067 } 1068 1069 CFISCSI_SESSION_LOCK(cs); 1070 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1071 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1072 CFISCSI_SESSION_UNLOCK(cs); 1073 /* 1074 * Set nonzero port status; this prevents backends from 1075 * assuming that the data transfer actually succeeded 1076 * and writing uninitialized data to disk. 1077 */ 1078 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1079 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1080 uma_zfree(cfiscsi_data_wait_zone, cdw); 1081 CFISCSI_SESSION_LOCK(cs); 1082 } 1083 CFISCSI_SESSION_UNLOCK(cs); 1084 1085 /* 1086 * Wait for CTL to terminate all the tasks. 1087 */ 1088 for (;;) { 1089 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1090 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1091 if (last != 0) 1092 break; 1093 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, " 1094 "%d remaining", cs->cs_outstanding_ctl_pdus); 1095 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1096 0, "cfiscsi_terminate", hz / 100); 1097 } 1098} 1099 1100static void 1101cfiscsi_maintenance_thread(void *arg) 1102{ 1103 struct cfiscsi_session *cs; 1104 1105 cs = arg; 1106 1107 for (;;) { 1108 CFISCSI_SESSION_LOCK(cs); 1109 if (cs->cs_terminating == false) 1110 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1111 CFISCSI_SESSION_UNLOCK(cs); 1112 1113 if (cs->cs_terminating) { 1114 1115 /* 1116 * We used to wait up to 30 seconds to deliver queued 1117 * PDUs to the initiator. We also tried hard to deliver 1118 * SCSI Responses for the aborted PDUs. We don't do 1119 * that anymore. We might need to revisit that. 1120 */ 1121 callout_drain(&cs->cs_callout); 1122 icl_conn_shutdown(cs->cs_conn); 1123 icl_conn_close(cs->cs_conn); 1124 1125 /* 1126 * At this point ICL receive thread is no longer 1127 * running; no new tasks can be queued. 1128 */ 1129 cfiscsi_session_terminate_tasks(cs); 1130 cfiscsi_session_delete(cs); 1131 kthread_exit(); 1132 return; 1133 } 1134 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1135 } 1136} 1137 1138static void 1139cfiscsi_session_terminate(struct cfiscsi_session *cs) 1140{ 1141 1142 if (cs->cs_terminating) 1143 return; 1144 cs->cs_terminating = true; 1145 cv_signal(&cs->cs_maintenance_cv); 1146#ifdef ICL_KERNEL_PROXY 1147 cv_signal(&cs->cs_login_cv); 1148#endif 1149} 1150 1151static int 1152cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1153{ 1154 struct cfiscsi_target *ct; 1155 char *name; 1156 int i; 1157 1158 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1159 1160 ct = cs->cs_target; 1161 name = strdup(cs->cs_initiator_id, M_CTL); 1162 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1163 if (i < 0) { 1164 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1165 i); 1166 cs->cs_ctl_initid = -1; 1167 return (1); 1168 } 1169 cs->cs_ctl_initid = i; 1170#if 0 1171 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1172#endif 1173 1174 return (0); 1175} 1176 1177static void 1178cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1179{ 1180 int error; 1181 1182 if (cs->cs_ctl_initid == -1) 1183 return; 1184 1185 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1186 if (error != 0) { 1187 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1188 error); 1189 } 1190 cs->cs_ctl_initid = -1; 1191} 1192 1193static struct cfiscsi_session * 1194cfiscsi_session_new(struct cfiscsi_softc *softc) 1195{ 1196 struct cfiscsi_session *cs; 1197 int error; 1198 1199 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1200 if (cs == NULL) { 1201 CFISCSI_WARN("malloc failed"); 1202 return (NULL); 1203 } 1204 cs->cs_ctl_initid = -1; 1205 1206 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1207 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1208 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1209 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1210#ifdef ICL_KERNEL_PROXY 1211 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1212#endif 1213 1214 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1215 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1216 cs->cs_conn->ic_error = cfiscsi_error_callback; 1217 cs->cs_conn->ic_prv0 = cs; 1218 1219 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1220 if (error != 0) { 1221 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1222 free(cs, M_CFISCSI); 1223 return (NULL); 1224 } 1225 1226 mtx_lock(&softc->lock); 1227 cs->cs_id = softc->last_session_id + 1; 1228 softc->last_session_id++; 1229 mtx_unlock(&softc->lock); 1230 1231 mtx_lock(&softc->lock); 1232 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1233 mtx_unlock(&softc->lock); 1234 1235 /* 1236 * Start pinging the initiator. 1237 */ 1238 callout_init(&cs->cs_callout, 1); 1239 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1240 1241 return (cs); 1242} 1243 1244static void 1245cfiscsi_session_delete(struct cfiscsi_session *cs) 1246{ 1247 struct cfiscsi_softc *softc; 1248 1249 softc = &cfiscsi_softc; 1250 1251 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1252 ("destroying session with outstanding CTL pdus")); 1253 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1254 ("destroying session with non-empty queue")); 1255 1256 cfiscsi_session_unregister_initiator(cs); 1257 if (cs->cs_target != NULL) 1258 cfiscsi_target_release(cs->cs_target); 1259 icl_conn_close(cs->cs_conn); 1260 icl_conn_free(cs->cs_conn); 1261 1262 mtx_lock(&softc->lock); 1263 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1264 mtx_unlock(&softc->lock); 1265 1266 free(cs, M_CFISCSI); 1267} 1268 1269int 1270cfiscsi_init(void) 1271{ 1272 struct cfiscsi_softc *softc; 1273 int retval; 1274 1275 softc = &cfiscsi_softc; 1276 retval = 0; 1277 bzero(softc, sizeof(*softc)); 1278 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1279 1280#ifdef ICL_KERNEL_PROXY 1281 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1282#endif 1283 TAILQ_INIT(&softc->sessions); 1284 TAILQ_INIT(&softc->targets); 1285 1286 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1287 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1288 UMA_ALIGN_PTR, 0); 1289 1290 return (0); 1291} 1292 1293#ifdef ICL_KERNEL_PROXY 1294static void 1295cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1296{ 1297 struct cfiscsi_session *cs; 1298 1299 cs = cfiscsi_session_new(&cfiscsi_softc); 1300 if (cs == NULL) { 1301 CFISCSI_WARN("failed to create session"); 1302 return; 1303 } 1304 1305 icl_conn_handoff_sock(cs->cs_conn, so); 1306 cs->cs_initiator_sa = sa; 1307 cs->cs_portal_id = portal_id; 1308 cs->cs_waiting_for_ctld = true; 1309 cv_signal(&cfiscsi_softc.accept_cv); 1310} 1311#endif 1312 1313static void 1314cfiscsi_online(void *arg) 1315{ 1316 struct cfiscsi_softc *softc; 1317 struct cfiscsi_target *ct; 1318 int online; 1319 1320 ct = (struct cfiscsi_target *)arg; 1321 softc = ct->ct_softc; 1322 1323 mtx_lock(&softc->lock); 1324 if (ct->ct_online) { 1325 mtx_unlock(&softc->lock); 1326 return; 1327 } 1328 ct->ct_online = 1; 1329 online = softc->online++; 1330 mtx_unlock(&softc->lock); 1331 if (online > 0) 1332 return; 1333 1334#ifdef ICL_KERNEL_PROXY 1335 if (softc->listener != NULL) 1336 icl_listen_free(softc->listener); 1337 softc->listener = icl_listen_new(cfiscsi_accept); 1338#endif 1339} 1340 1341static void 1342cfiscsi_offline(void *arg) 1343{ 1344 struct cfiscsi_softc *softc; 1345 struct cfiscsi_target *ct; 1346 struct cfiscsi_session *cs; 1347 int online; 1348 1349 ct = (struct cfiscsi_target *)arg; 1350 softc = ct->ct_softc; 1351 1352 mtx_lock(&softc->lock); 1353 if (!ct->ct_online) { 1354 mtx_unlock(&softc->lock); 1355 return; 1356 } 1357 ct->ct_online = 0; 1358 online = --softc->online; 1359 1360 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1361 if (cs->cs_target == ct) 1362 cfiscsi_session_terminate(cs); 1363 } 1364 mtx_unlock(&softc->lock); 1365 if (online > 0) 1366 return; 1367 1368#ifdef ICL_KERNEL_PROXY 1369 icl_listen_free(softc->listener); 1370 softc->listener = NULL; 1371#endif 1372} 1373 1374static int 1375cfiscsi_info(void *arg, struct sbuf *sb) 1376{ 1377 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1378 int retval; 1379 1380 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1381 ct->ct_state); 1382 return (retval); 1383} 1384 1385static void 1386cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1387{ 1388 struct cfiscsi_softc *softc; 1389 struct cfiscsi_session *cs, *cs2; 1390 struct cfiscsi_target *ct; 1391 struct ctl_iscsi_handoff_params *cihp; 1392 int error; 1393 1394 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1395 softc = &cfiscsi_softc; 1396 1397 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1398 cihp->initiator_name, cihp->initiator_addr, 1399 cihp->target_name); 1400 1401 ct = cfiscsi_target_find(softc, cihp->target_name); 1402 if (ct == NULL) { 1403 ci->status = CTL_ISCSI_ERROR; 1404 snprintf(ci->error_str, sizeof(ci->error_str), 1405 "%s: target not found", __func__); 1406 return; 1407 } 1408 1409 if (ct->ct_online == 0) { 1410 ci->status = CTL_ISCSI_ERROR; 1411 snprintf(ci->error_str, sizeof(ci->error_str), 1412 "%s: port offline", __func__); 1413 cfiscsi_target_release(ct); 1414 return; 1415 } 1416 1417#ifdef ICL_KERNEL_PROXY 1418 if (cihp->socket > 0 && cihp->connection_id > 0) { 1419 snprintf(ci->error_str, sizeof(ci->error_str), 1420 "both socket and connection_id set"); 1421 ci->status = CTL_ISCSI_ERROR; 1422 cfiscsi_target_release(ct); 1423 return; 1424 } 1425 if (cihp->socket == 0) { 1426 mtx_lock(&cfiscsi_softc.lock); 1427 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1428 if (cs->cs_id == cihp->socket) 1429 break; 1430 } 1431 if (cs == NULL) { 1432 mtx_unlock(&cfiscsi_softc.lock); 1433 snprintf(ci->error_str, sizeof(ci->error_str), 1434 "connection not found"); 1435 ci->status = CTL_ISCSI_ERROR; 1436 cfiscsi_target_release(ct); 1437 return; 1438 } 1439 mtx_unlock(&cfiscsi_softc.lock); 1440 } else { 1441#endif 1442 cs = cfiscsi_session_new(softc); 1443 if (cs == NULL) { 1444 ci->status = CTL_ISCSI_ERROR; 1445 snprintf(ci->error_str, sizeof(ci->error_str), 1446 "%s: cfiscsi_session_new failed", __func__); 1447 cfiscsi_target_release(ct); 1448 return; 1449 } 1450#ifdef ICL_KERNEL_PROXY 1451 } 1452#endif 1453 cs->cs_target = ct; 1454 1455 /* 1456 * First PDU of Full Feature phase has the same CmdSN as the last 1457 * PDU from the Login Phase received from the initiator. Thus, 1458 * the -1 below. 1459 */ 1460 cs->cs_portal_group_tag = cihp->portal_group_tag; 1461 cs->cs_cmdsn = cihp->cmdsn; 1462 cs->cs_statsn = cihp->statsn; 1463 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1464 cs->cs_max_burst_length = cihp->max_burst_length; 1465 cs->cs_immediate_data = !!cihp->immediate_data; 1466 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1467 cs->cs_conn->ic_header_crc32c = true; 1468 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1469 cs->cs_conn->ic_data_crc32c = true; 1470 1471 strlcpy(cs->cs_initiator_name, 1472 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1473 strlcpy(cs->cs_initiator_addr, 1474 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1475 strlcpy(cs->cs_initiator_alias, 1476 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1477 memcpy(cs->cs_initiator_isid, 1478 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1479 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1480 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1481 cihp->initiator_isid[0], cihp->initiator_isid[1], 1482 cihp->initiator_isid[2], cihp->initiator_isid[3], 1483 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1484 1485 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1486restart: 1487 if (!cs->cs_terminating) { 1488 mtx_lock(&softc->lock); 1489 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1490 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1491 cs->cs_target == cs2->cs_target && 1492 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1493 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1494 cfiscsi_session_terminate(cs2); 1495 mtx_unlock(&softc->lock); 1496 pause("cfiscsi_reinstate", 1); 1497 goto restart; 1498 } 1499 } 1500 mtx_unlock(&softc->lock); 1501 } 1502 1503 /* 1504 * Register initiator with CTL. 1505 */ 1506 cfiscsi_session_register_initiator(cs); 1507 1508#ifdef ICL_KERNEL_PROXY 1509 if (cihp->socket > 0) { 1510#endif 1511 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1512 if (error != 0) { 1513 cfiscsi_session_terminate(cs); 1514 refcount_release(&cs->cs_outstanding_ctl_pdus); 1515 ci->status = CTL_ISCSI_ERROR; 1516 snprintf(ci->error_str, sizeof(ci->error_str), 1517 "%s: icl_conn_handoff failed with error %d", 1518 __func__, error); 1519 return; 1520 } 1521#ifdef ICL_KERNEL_PROXY 1522 } 1523#endif 1524 1525#ifdef ICL_KERNEL_PROXY 1526 cs->cs_login_phase = false; 1527 1528 /* 1529 * First PDU of the Full Feature phase has likely already arrived. 1530 * We have to pick it up and execute properly. 1531 */ 1532 if (cs->cs_login_pdu != NULL) { 1533 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1534 cfiscsi_pdu_handle(cs->cs_login_pdu); 1535 cs->cs_login_pdu = NULL; 1536 } 1537#endif 1538 1539 refcount_release(&cs->cs_outstanding_ctl_pdus); 1540 ci->status = CTL_ISCSI_OK; 1541} 1542 1543static void 1544cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1545{ 1546 struct ctl_iscsi_list_params *cilp; 1547 struct cfiscsi_session *cs; 1548 struct cfiscsi_softc *softc; 1549 struct sbuf *sb; 1550 int error; 1551 1552 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1553 softc = &cfiscsi_softc; 1554 1555 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1556 if (sb == NULL) { 1557 ci->status = CTL_ISCSI_ERROR; 1558 snprintf(ci->error_str, sizeof(ci->error_str), 1559 "Unable to allocate %d bytes for iSCSI session list", 1560 cilp->alloc_len); 1561 return; 1562 } 1563 1564 sbuf_printf(sb, "<ctlislist>\n"); 1565 mtx_lock(&softc->lock); 1566 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1567#ifdef ICL_KERNEL_PROXY 1568 if (cs->cs_target == NULL) 1569 continue; 1570#endif 1571 error = sbuf_printf(sb, "<connection id=\"%d\">" 1572 "<initiator>%s</initiator>" 1573 "<initiator_addr>%s</initiator_addr>" 1574 "<initiator_alias>%s</initiator_alias>" 1575 "<target>%s</target>" 1576 "<target_alias>%s</target_alias>" 1577 "<header_digest>%s</header_digest>" 1578 "<data_digest>%s</data_digest>" 1579 "<max_data_segment_length>%zd</max_data_segment_length>" 1580 "<immediate_data>%d</immediate_data>" 1581 "<iser>%d</iser>" 1582 "</connection>\n", 1583 cs->cs_id, 1584 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1585 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1586 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1587 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1588 cs->cs_max_data_segment_length, 1589 cs->cs_immediate_data, 1590 cs->cs_conn->ic_iser); 1591 if (error != 0) 1592 break; 1593 } 1594 mtx_unlock(&softc->lock); 1595 error = sbuf_printf(sb, "</ctlislist>\n"); 1596 if (error != 0) { 1597 sbuf_delete(sb); 1598 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1599 snprintf(ci->error_str, sizeof(ci->error_str), 1600 "Out of space, %d bytes is too small", cilp->alloc_len); 1601 return; 1602 } 1603 sbuf_finish(sb); 1604 1605 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1606 cilp->fill_len = sbuf_len(sb) + 1; 1607 ci->status = CTL_ISCSI_OK; 1608 sbuf_delete(sb); 1609} 1610 1611static void 1612cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1613{ 1614 struct icl_pdu *response; 1615 struct iscsi_bhs_asynchronous_message *bhsam; 1616 struct ctl_iscsi_terminate_params *citp; 1617 struct cfiscsi_session *cs; 1618 struct cfiscsi_softc *softc; 1619 int found = 0; 1620 1621 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1622 softc = &cfiscsi_softc; 1623 1624 mtx_lock(&softc->lock); 1625 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1626 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1627 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1628 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1629 continue; 1630 1631 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1632 if (response == NULL) { 1633 /* 1634 * Oh well. Just terminate the connection. 1635 */ 1636 } else { 1637 bhsam = (struct iscsi_bhs_asynchronous_message *) 1638 response->ip_bhs; 1639 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1640 bhsam->bhsam_flags = 0x80; 1641 bhsam->bhsam_0xffffffff = 0xffffffff; 1642 bhsam->bhsam_async_event = 1643 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1644 cfiscsi_pdu_queue(response); 1645 } 1646 cfiscsi_session_terminate(cs); 1647 found++; 1648 } 1649 mtx_unlock(&softc->lock); 1650 1651 if (found == 0) { 1652 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1653 snprintf(ci->error_str, sizeof(ci->error_str), 1654 "No matching connections found"); 1655 return; 1656 } 1657 1658 ci->status = CTL_ISCSI_OK; 1659} 1660 1661static void 1662cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1663{ 1664 struct icl_pdu *response; 1665 struct iscsi_bhs_asynchronous_message *bhsam; 1666 struct ctl_iscsi_logout_params *cilp; 1667 struct cfiscsi_session *cs; 1668 struct cfiscsi_softc *softc; 1669 int found = 0; 1670 1671 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1672 softc = &cfiscsi_softc; 1673 1674 mtx_lock(&softc->lock); 1675 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1676 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1677 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1678 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1679 continue; 1680 1681 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1682 if (response == NULL) { 1683 ci->status = CTL_ISCSI_ERROR; 1684 snprintf(ci->error_str, sizeof(ci->error_str), 1685 "Unable to allocate memory"); 1686 mtx_unlock(&softc->lock); 1687 return; 1688 } 1689 bhsam = 1690 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1691 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1692 bhsam->bhsam_flags = 0x80; 1693 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1694 bhsam->bhsam_parameter3 = htons(10); 1695 cfiscsi_pdu_queue(response); 1696 found++; 1697 } 1698 mtx_unlock(&softc->lock); 1699 1700 if (found == 0) { 1701 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1702 snprintf(ci->error_str, sizeof(ci->error_str), 1703 "No matching connections found"); 1704 return; 1705 } 1706 1707 ci->status = CTL_ISCSI_OK; 1708} 1709 1710#ifdef ICL_KERNEL_PROXY 1711static void 1712cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1713{ 1714 struct ctl_iscsi_listen_params *cilp; 1715 struct sockaddr *sa; 1716 int error; 1717 1718 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1719 1720 if (cfiscsi_softc.listener == NULL) { 1721 CFISCSI_DEBUG("no listener"); 1722 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1723 ci->status = CTL_ISCSI_ERROR; 1724 return; 1725 } 1726 1727 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1728 if (error != 0) { 1729 CFISCSI_DEBUG("getsockaddr, error %d", error); 1730 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1731 ci->status = CTL_ISCSI_ERROR; 1732 return; 1733 } 1734 1735 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1736 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1737 if (error != 0) { 1738 free(sa, M_SONAME); 1739 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1740 snprintf(ci->error_str, sizeof(ci->error_str), 1741 "icl_listen_add failed, error %d", error); 1742 ci->status = CTL_ISCSI_ERROR; 1743 return; 1744 } 1745 1746 ci->status = CTL_ISCSI_OK; 1747} 1748 1749static void 1750cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1751{ 1752 struct ctl_iscsi_accept_params *ciap; 1753 struct cfiscsi_session *cs; 1754 int error; 1755 1756 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1757 1758 mtx_lock(&cfiscsi_softc.lock); 1759 for (;;) { 1760 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1761 if (cs->cs_waiting_for_ctld) 1762 break; 1763 } 1764 if (cs != NULL) 1765 break; 1766 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1767 if (error != 0) { 1768 mtx_unlock(&cfiscsi_softc.lock); 1769 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1770 ci->status = CTL_ISCSI_ERROR; 1771 return; 1772 } 1773 } 1774 mtx_unlock(&cfiscsi_softc.lock); 1775 1776 cs->cs_waiting_for_ctld = false; 1777 cs->cs_login_phase = true; 1778 1779 ciap->connection_id = cs->cs_id; 1780 ciap->portal_id = cs->cs_portal_id; 1781 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1782 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1783 cs->cs_initiator_sa->sa_len); 1784 if (error != 0) { 1785 snprintf(ci->error_str, sizeof(ci->error_str), 1786 "copyout failed with error %d", error); 1787 ci->status = CTL_ISCSI_ERROR; 1788 return; 1789 } 1790 1791 ci->status = CTL_ISCSI_OK; 1792} 1793 1794static void 1795cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1796{ 1797 struct ctl_iscsi_send_params *cisp; 1798 struct cfiscsi_session *cs; 1799 struct icl_pdu *ip; 1800 size_t datalen; 1801 void *data; 1802 int error; 1803 1804 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1805 1806 mtx_lock(&cfiscsi_softc.lock); 1807 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1808 if (cs->cs_id == cisp->connection_id) 1809 break; 1810 } 1811 if (cs == NULL) { 1812 mtx_unlock(&cfiscsi_softc.lock); 1813 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1814 ci->status = CTL_ISCSI_ERROR; 1815 return; 1816 } 1817 mtx_unlock(&cfiscsi_softc.lock); 1818 1819#if 0 1820 if (cs->cs_login_phase == false) 1821 return (EBUSY); 1822#endif 1823 1824 if (cs->cs_terminating) { 1825 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1826 ci->status = CTL_ISCSI_ERROR; 1827 return; 1828 } 1829 1830 datalen = cisp->data_segment_len; 1831 /* 1832 * XXX 1833 */ 1834 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1835 if (datalen > 65535) { 1836 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1837 ci->status = CTL_ISCSI_ERROR; 1838 return; 1839 } 1840 if (datalen > 0) { 1841 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1842 error = copyin(cisp->data_segment, data, datalen); 1843 if (error != 0) { 1844 free(data, M_CFISCSI); 1845 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1846 ci->status = CTL_ISCSI_ERROR; 1847 return; 1848 } 1849 } 1850 1851 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1852 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1853 if (datalen > 0) { 1854 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1855 free(data, M_CFISCSI); 1856 } 1857 CFISCSI_SESSION_LOCK(cs); 1858 icl_pdu_queue(ip); 1859 CFISCSI_SESSION_UNLOCK(cs); 1860 ci->status = CTL_ISCSI_OK; 1861} 1862 1863static void 1864cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1865{ 1866 struct ctl_iscsi_receive_params *cirp; 1867 struct cfiscsi_session *cs; 1868 struct icl_pdu *ip; 1869 void *data; 1870 int error; 1871 1872 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1873 1874 mtx_lock(&cfiscsi_softc.lock); 1875 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1876 if (cs->cs_id == cirp->connection_id) 1877 break; 1878 } 1879 if (cs == NULL) { 1880 mtx_unlock(&cfiscsi_softc.lock); 1881 snprintf(ci->error_str, sizeof(ci->error_str), 1882 "connection not found"); 1883 ci->status = CTL_ISCSI_ERROR; 1884 return; 1885 } 1886 mtx_unlock(&cfiscsi_softc.lock); 1887 1888#if 0 1889 if (is->is_login_phase == false) 1890 return (EBUSY); 1891#endif 1892 1893 CFISCSI_SESSION_LOCK(cs); 1894 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1895 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1896 if (error != 0) { 1897 CFISCSI_SESSION_UNLOCK(cs); 1898 snprintf(ci->error_str, sizeof(ci->error_str), 1899 "interrupted by signal"); 1900 ci->status = CTL_ISCSI_ERROR; 1901 return; 1902 } 1903 } 1904 1905 if (cs->cs_terminating) { 1906 CFISCSI_SESSION_UNLOCK(cs); 1907 snprintf(ci->error_str, sizeof(ci->error_str), 1908 "connection terminating"); 1909 ci->status = CTL_ISCSI_ERROR; 1910 return; 1911 } 1912 ip = cs->cs_login_pdu; 1913 cs->cs_login_pdu = NULL; 1914 CFISCSI_SESSION_UNLOCK(cs); 1915 1916 if (ip->ip_data_len > cirp->data_segment_len) { 1917 icl_pdu_free(ip); 1918 snprintf(ci->error_str, sizeof(ci->error_str), 1919 "data segment too big"); 1920 ci->status = CTL_ISCSI_ERROR; 1921 return; 1922 } 1923 1924 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1925 if (ip->ip_data_len > 0) { 1926 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1927 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1928 copyout(data, cirp->data_segment, ip->ip_data_len); 1929 free(data, M_CFISCSI); 1930 } 1931 1932 icl_pdu_free(ip); 1933 ci->status = CTL_ISCSI_OK; 1934} 1935 1936#endif /* !ICL_KERNEL_PROXY */ 1937 1938static void 1939cfiscsi_ioctl_port_create(struct ctl_req *req) 1940{ 1941 struct cfiscsi_target *ct; 1942 struct ctl_port *port; 1943 const char *target, *alias, *tag; 1944 struct scsi_vpd_id_descriptor *desc; 1945 ctl_options_t opts; 1946 int retval, len, idlen; 1947 1948 ctl_init_opts(&opts, req->num_args, req->kern_args); 1949 target = ctl_get_opt(&opts, "cfiscsi_target"); 1950 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1951 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1952 if (target == NULL || tag == NULL) { 1953 req->status = CTL_LUN_ERROR; 1954 snprintf(req->error_str, sizeof(req->error_str), 1955 "Missing required argument"); 1956 ctl_free_opts(&opts); 1957 return; 1958 } 1959 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1960 if (ct == NULL) { 1961 req->status = CTL_LUN_ERROR; 1962 snprintf(req->error_str, sizeof(req->error_str), 1963 "failed to create target \"%s\"", target); 1964 ctl_free_opts(&opts); 1965 return; 1966 } 1967 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1968 req->status = CTL_LUN_ERROR; 1969 snprintf(req->error_str, sizeof(req->error_str), 1970 "target \"%s\" already exist", target); 1971 cfiscsi_target_release(ct); 1972 ctl_free_opts(&opts); 1973 return; 1974 } 1975 port = &ct->ct_port; 1976 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 1977 goto done; 1978 1979 port->frontend = &cfiscsi_frontend; 1980 port->port_type = CTL_PORT_ISCSI; 1981 /* XXX KDM what should the real number be here? */ 1982 port->num_requested_ctl_io = 4096; 1983 port->port_name = "iscsi"; 1984 port->virtual_port = strtoul(tag, NULL, 0); 1985 port->port_online = cfiscsi_online; 1986 port->port_offline = cfiscsi_offline; 1987 port->port_info = cfiscsi_info; 1988 port->onoff_arg = ct; 1989 port->lun_enable = cfiscsi_lun_enable; 1990 port->lun_disable = cfiscsi_lun_disable; 1991 port->lun_map = cfiscsi_lun_map; 1992 port->targ_lun_arg = ct; 1993 port->fe_datamove = cfiscsi_datamove; 1994 port->fe_done = cfiscsi_done; 1995 1996 /* XXX KDM what should we report here? */ 1997 /* XXX These should probably be fetched from CTL. */ 1998 port->max_targets = 1; 1999 port->max_target_id = 15; 2000 2001 port->options = opts; 2002 STAILQ_INIT(&opts); 2003 2004 /* Generate Port ID. */ 2005 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2006 idlen = roundup2(idlen, 4); 2007 len = sizeof(struct scsi_vpd_device_id) + idlen; 2008 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2009 M_CTL, M_WAITOK | M_ZERO); 2010 port->port_devid->len = len; 2011 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2012 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2013 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2014 SVPD_ID_TYPE_SCSI_NAME; 2015 desc->length = idlen; 2016 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2017 target, port->virtual_port); 2018 2019 /* Generate Target ID. */ 2020 idlen = strlen(target) + 1; 2021 idlen = roundup2(idlen, 4); 2022 len = sizeof(struct scsi_vpd_device_id) + idlen; 2023 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2024 M_CTL, M_WAITOK | M_ZERO); 2025 port->target_devid->len = len; 2026 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2027 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2028 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2029 SVPD_ID_TYPE_SCSI_NAME; 2030 desc->length = idlen; 2031 strlcpy(desc->identifier, target, idlen); 2032 2033 retval = ctl_port_register(port, /*master_SC*/ 1); 2034 if (retval != 0) { 2035 ctl_free_opts(&port->options); 2036 cfiscsi_target_release(ct); 2037 free(port->port_devid, M_CFISCSI); 2038 free(port->target_devid, M_CFISCSI); 2039 req->status = CTL_LUN_ERROR; 2040 snprintf(req->error_str, sizeof(req->error_str), 2041 "ctl_frontend_register() failed with error %d", retval); 2042 return; 2043 } 2044done: 2045 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2046 req->status = CTL_LUN_OK; 2047 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2048 sizeof(port->targ_port)); //XXX 2049} 2050 2051static void 2052cfiscsi_ioctl_port_remove(struct ctl_req *req) 2053{ 2054 struct cfiscsi_target *ct; 2055 const char *target; 2056 ctl_options_t opts; 2057 2058 ctl_init_opts(&opts, req->num_args, req->kern_args); 2059 target = ctl_get_opt(&opts, "cfiscsi_target"); 2060 if (target == NULL) { 2061 ctl_free_opts(&opts); 2062 req->status = CTL_LUN_ERROR; 2063 snprintf(req->error_str, sizeof(req->error_str), 2064 "Missing required argument"); 2065 return; 2066 } 2067 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2068 if (ct == NULL) { 2069 ctl_free_opts(&opts); 2070 req->status = CTL_LUN_ERROR; 2071 snprintf(req->error_str, sizeof(req->error_str), 2072 "can't find target \"%s\"", target); 2073 return; 2074 } 2075 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2076 ctl_free_opts(&opts); 2077 req->status = CTL_LUN_ERROR; 2078 snprintf(req->error_str, sizeof(req->error_str), 2079 "target \"%s\" is already dying", target); 2080 return; 2081 } 2082 ctl_free_opts(&opts); 2083 2084 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2085 ctl_port_offline(&ct->ct_port); 2086 cfiscsi_target_release(ct); 2087 cfiscsi_target_release(ct); 2088} 2089 2090static int 2091cfiscsi_ioctl(struct cdev *dev, 2092 u_long cmd, caddr_t addr, int flag, struct thread *td) 2093{ 2094 struct ctl_iscsi *ci; 2095 struct ctl_req *req; 2096 2097 if (cmd == CTL_PORT_REQ) { 2098 req = (struct ctl_req *)addr; 2099 switch (req->reqtype) { 2100 case CTL_REQ_CREATE: 2101 cfiscsi_ioctl_port_create(req); 2102 break; 2103 case CTL_REQ_REMOVE: 2104 cfiscsi_ioctl_port_remove(req); 2105 break; 2106 default: 2107 req->status = CTL_LUN_ERROR; 2108 snprintf(req->error_str, sizeof(req->error_str), 2109 "Unsupported request type %d", req->reqtype); 2110 } 2111 return (0); 2112 } 2113 2114 if (cmd != CTL_ISCSI) 2115 return (ENOTTY); 2116 2117 ci = (struct ctl_iscsi *)addr; 2118 switch (ci->type) { 2119 case CTL_ISCSI_HANDOFF: 2120 cfiscsi_ioctl_handoff(ci); 2121 break; 2122 case CTL_ISCSI_LIST: 2123 cfiscsi_ioctl_list(ci); 2124 break; 2125 case CTL_ISCSI_TERMINATE: 2126 cfiscsi_ioctl_terminate(ci); 2127 break; 2128 case CTL_ISCSI_LOGOUT: 2129 cfiscsi_ioctl_logout(ci); 2130 break; 2131#ifdef ICL_KERNEL_PROXY 2132 case CTL_ISCSI_LISTEN: 2133 cfiscsi_ioctl_listen(ci); 2134 break; 2135 case CTL_ISCSI_ACCEPT: 2136 cfiscsi_ioctl_accept(ci); 2137 break; 2138 case CTL_ISCSI_SEND: 2139 cfiscsi_ioctl_send(ci); 2140 break; 2141 case CTL_ISCSI_RECEIVE: 2142 cfiscsi_ioctl_receive(ci); 2143 break; 2144#else 2145 case CTL_ISCSI_LISTEN: 2146 case CTL_ISCSI_ACCEPT: 2147 case CTL_ISCSI_SEND: 2148 case CTL_ISCSI_RECEIVE: 2149 ci->status = CTL_ISCSI_ERROR; 2150 snprintf(ci->error_str, sizeof(ci->error_str), 2151 "%s: CTL compiled without ICL_KERNEL_PROXY", 2152 __func__); 2153 break; 2154#endif /* !ICL_KERNEL_PROXY */ 2155 default: 2156 ci->status = CTL_ISCSI_ERROR; 2157 snprintf(ci->error_str, sizeof(ci->error_str), 2158 "%s: invalid iSCSI request type %d", __func__, ci->type); 2159 break; 2160 } 2161 2162 return (0); 2163} 2164 2165static void 2166cfiscsi_target_hold(struct cfiscsi_target *ct) 2167{ 2168 2169 refcount_acquire(&ct->ct_refcount); 2170} 2171 2172static void 2173cfiscsi_target_release(struct cfiscsi_target *ct) 2174{ 2175 struct cfiscsi_softc *softc; 2176 2177 softc = ct->ct_softc; 2178 mtx_lock(&softc->lock); 2179 if (refcount_release(&ct->ct_refcount)) { 2180 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2181 mtx_unlock(&softc->lock); 2182 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2183 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2184 if (ctl_port_deregister(&ct->ct_port) != 0) 2185 printf("%s: ctl_port_deregister() failed\n", 2186 __func__); 2187 } 2188 free(ct, M_CFISCSI); 2189 2190 return; 2191 } 2192 mtx_unlock(&softc->lock); 2193} 2194 2195static struct cfiscsi_target * 2196cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2197{ 2198 struct cfiscsi_target *ct; 2199 2200 mtx_lock(&softc->lock); 2201 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2202 if (strcmp(name, ct->ct_name) != 0 || 2203 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2204 continue; 2205 cfiscsi_target_hold(ct); 2206 mtx_unlock(&softc->lock); 2207 return (ct); 2208 } 2209 mtx_unlock(&softc->lock); 2210 2211 return (NULL); 2212} 2213 2214static struct cfiscsi_target * 2215cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2216 const char *alias) 2217{ 2218 struct cfiscsi_target *ct, *newct; 2219 int i; 2220 2221 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2222 return (NULL); 2223 2224 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2225 2226 mtx_lock(&softc->lock); 2227 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2228 if (strcmp(name, ct->ct_name) != 0 || 2229 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2230 continue; 2231 cfiscsi_target_hold(ct); 2232 mtx_unlock(&softc->lock); 2233 free(newct, M_CFISCSI); 2234 return (ct); 2235 } 2236 2237 for (i = 0; i < CTL_MAX_LUNS; i++) 2238 newct->ct_luns[i] = UINT32_MAX; 2239 2240 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2241 if (alias != NULL) 2242 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2243 refcount_init(&newct->ct_refcount, 1); 2244 newct->ct_softc = softc; 2245 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2246 mtx_unlock(&softc->lock); 2247 2248 return (newct); 2249} 2250 2251/* 2252 * Takes LUN from the target space and returns LUN from the CTL space. 2253 */ 2254static uint32_t 2255cfiscsi_lun_map(void *arg, uint32_t lun) 2256{ 2257 struct cfiscsi_target *ct = arg; 2258 2259 if (lun >= CTL_MAX_LUNS) { 2260 CFISCSI_DEBUG("requested lun number %d is higher " 2261 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2262 return (UINT32_MAX); 2263 } 2264 return (ct->ct_luns[lun]); 2265} 2266 2267static int 2268cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2269 unsigned long lun_id, unsigned long ctl_lun_id) 2270{ 2271 2272 if (lun_id >= CTL_MAX_LUNS) { 2273 CFISCSI_WARN("requested lun number %ld is higher " 2274 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2275 return (-1); 2276 } 2277 2278 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2279 /* 2280 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2281 * when the LUN is created, and a second time just before 2282 * the port is brought online; don't emit warnings 2283 * for that case. 2284 */ 2285 if (ct->ct_luns[lun_id] == ctl_lun_id) 2286 return (0); 2287 CFISCSI_WARN("lun %ld already allocated", lun_id); 2288 return (-1); 2289 } 2290 2291#if 0 2292 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2293 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2294#endif 2295 2296 ct->ct_luns[lun_id] = ctl_lun_id; 2297 2298 return (0); 2299} 2300 2301static int 2302cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2303{ 2304 struct cfiscsi_softc *softc; 2305 struct cfiscsi_target *ct; 2306 const char *target = NULL; 2307 const char *lun = NULL; 2308 unsigned long tmp; 2309 2310 ct = (struct cfiscsi_target *)arg; 2311 softc = ct->ct_softc; 2312 2313 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2314 "cfiscsi_target"); 2315 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2316 "cfiscsi_lun"); 2317 2318 if (target == NULL && lun == NULL) 2319 return (0); 2320 2321 if (target == NULL || lun == NULL) { 2322 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2323 "cfiscsi_lun, or the other way around; ignoring"); 2324 return (0); 2325 } 2326 2327 if (strcmp(target, ct->ct_name) != 0) 2328 return (0); 2329 2330 tmp = strtoul(lun, NULL, 10); 2331 cfiscsi_target_set_lun(ct, tmp, lun_id); 2332 return (0); 2333} 2334 2335static int 2336cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2337{ 2338 struct cfiscsi_softc *softc; 2339 struct cfiscsi_target *ct; 2340 int i; 2341 2342 ct = (struct cfiscsi_target *)arg; 2343 softc = ct->ct_softc; 2344 2345 mtx_lock(&softc->lock); 2346 for (i = 0; i < CTL_MAX_LUNS; i++) { 2347 if (ct->ct_luns[i] != lun_id) 2348 continue; 2349 ct->ct_luns[i] = UINT32_MAX; 2350 break; 2351 } 2352 mtx_unlock(&softc->lock); 2353 return (0); 2354} 2355 2356static void 2357cfiscsi_datamove_in(union ctl_io *io) 2358{ 2359 struct cfiscsi_session *cs; 2360 struct icl_pdu *request, *response; 2361 const struct iscsi_bhs_scsi_command *bhssc; 2362 struct iscsi_bhs_data_in *bhsdi; 2363 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2364 size_t len, expected_len, sg_len, buffer_offset; 2365 const char *sg_addr; 2366 int ctl_sg_count, error, i; 2367 2368 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2369 cs = PDU_SESSION(request); 2370 2371 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2372 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2373 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2374 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2375 2376 if (io->scsiio.kern_sg_entries > 0) { 2377 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2378 ctl_sg_count = io->scsiio.kern_sg_entries; 2379 } else { 2380 ctl_sglist = &ctl_sg_entry; 2381 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2382 ctl_sglist->len = io->scsiio.kern_data_len; 2383 ctl_sg_count = 1; 2384 } 2385 2386 /* 2387 * This is the total amount of data to be transferred within the current 2388 * SCSI command. We need to record it so that we can properly report 2389 * underflow/underflow. 2390 */ 2391 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2392 2393 /* 2394 * This is the offset within the current SCSI command; for the first 2395 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2396 * it will be the sum of lengths of previous ones. 2397 */ 2398 buffer_offset = io->scsiio.kern_rel_offset; 2399 2400 /* 2401 * This is the transfer length expected by the initiator. In theory, 2402 * it could be different from the correct amount of data from the SCSI 2403 * point of view, even if that doesn't make any sense. 2404 */ 2405 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2406#if 0 2407 if (expected_len != io->scsiio.kern_total_len) { 2408 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2409 "actual length %zd", expected_len, 2410 (size_t)io->scsiio.kern_total_len); 2411 } 2412#endif 2413 2414 if (buffer_offset >= expected_len) { 2415#if 0 2416 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2417 "already sent the expected len", buffer_offset); 2418#endif 2419 io->scsiio.be_move_done(io); 2420 return; 2421 } 2422 2423 i = 0; 2424 sg_addr = NULL; 2425 sg_len = 0; 2426 response = NULL; 2427 bhsdi = NULL; 2428 for (;;) { 2429 if (response == NULL) { 2430 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2431 if (response == NULL) { 2432 CFISCSI_SESSION_WARN(cs, "failed to " 2433 "allocate memory; dropping connection"); 2434 ctl_set_busy(&io->scsiio); 2435 io->scsiio.be_move_done(io); 2436 cfiscsi_session_terminate(cs); 2437 return; 2438 } 2439 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2440 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2441 bhsdi->bhsdi_initiator_task_tag = 2442 bhssc->bhssc_initiator_task_tag; 2443 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2444 PDU_EXPDATASN(request)++; 2445 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2446 } 2447 2448 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2449 if (sg_len == 0) { 2450 sg_addr = ctl_sglist[i].addr; 2451 sg_len = ctl_sglist[i].len; 2452 KASSERT(sg_len > 0, ("sg_len <= 0")); 2453 } 2454 2455 len = sg_len; 2456 2457 /* 2458 * Truncate to maximum data segment length. 2459 */ 2460 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2461 ("ip_data_len %zd >= max_data_segment_length %zd", 2462 response->ip_data_len, cs->cs_max_data_segment_length)); 2463 if (response->ip_data_len + len > 2464 cs->cs_max_data_segment_length) { 2465 len = cs->cs_max_data_segment_length - 2466 response->ip_data_len; 2467 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2468 len, sg_len)); 2469 } 2470 2471 /* 2472 * Truncate to expected data transfer length. 2473 */ 2474 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2475 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2476 buffer_offset, response->ip_data_len, expected_len)); 2477 if (buffer_offset + response->ip_data_len + len > expected_len) { 2478 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2479 "to expected data transfer length %zd", 2480 buffer_offset + response->ip_data_len + len, expected_len); 2481 len = expected_len - (buffer_offset + response->ip_data_len); 2482 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2483 len, sg_len)); 2484 } 2485 2486 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2487 if (error != 0) { 2488 CFISCSI_SESSION_WARN(cs, "failed to " 2489 "allocate memory; dropping connection"); 2490 icl_pdu_free(response); 2491 ctl_set_busy(&io->scsiio); 2492 io->scsiio.be_move_done(io); 2493 cfiscsi_session_terminate(cs); 2494 return; 2495 } 2496 sg_addr += len; 2497 sg_len -= len; 2498 2499 KASSERT(buffer_offset + request->ip_data_len <= expected_len, 2500 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2501 buffer_offset, request->ip_data_len, expected_len)); 2502 if (buffer_offset + request->ip_data_len == expected_len) { 2503 /* 2504 * Already have the amount of data the initiator wanted. 2505 */ 2506 break; 2507 } 2508 2509 if (sg_len == 0) { 2510 /* 2511 * End of scatter-gather segment; 2512 * proceed to the next one... 2513 */ 2514 if (i == ctl_sg_count - 1) { 2515 /* 2516 * ... unless this was the last one. 2517 */ 2518 break; 2519 } 2520 i++; 2521 } 2522 2523 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2524 /* 2525 * Can't stuff more data into the current PDU; 2526 * queue it. Note that's not enough to check 2527 * for kern_data_resid == 0 instead; there 2528 * may be several Data-In PDUs for the final 2529 * call to cfiscsi_datamove(), and we want 2530 * to set the F flag only on the last of them. 2531 */ 2532 buffer_offset += response->ip_data_len; 2533 if (buffer_offset == io->scsiio.kern_total_len || 2534 buffer_offset == expected_len) 2535 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2536 cfiscsi_pdu_queue(response); 2537 response = NULL; 2538 bhsdi = NULL; 2539 } 2540 } 2541 if (response != NULL) { 2542 buffer_offset += response->ip_data_len; 2543 if (buffer_offset == io->scsiio.kern_total_len || 2544 buffer_offset == expected_len) 2545 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2546 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2547 cfiscsi_pdu_queue(response); 2548 } 2549 2550 io->scsiio.be_move_done(io); 2551} 2552 2553static void 2554cfiscsi_datamove_out(union ctl_io *io) 2555{ 2556 struct cfiscsi_session *cs; 2557 struct icl_pdu *request, *response; 2558 const struct iscsi_bhs_scsi_command *bhssc; 2559 struct iscsi_bhs_r2t *bhsr2t; 2560 struct cfiscsi_data_wait *cdw; 2561 uint32_t target_transfer_tag; 2562 bool done; 2563 2564 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2565 cs = PDU_SESSION(request); 2566 2567 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2568 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2569 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2570 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2571 2572 /* 2573 * We need to record it so that we can properly report 2574 * underflow/underflow. 2575 */ 2576 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2577 2578 /* 2579 * We hadn't received anything during this datamove yet. 2580 */ 2581 io->scsiio.ext_data_filled = 0; 2582 2583 target_transfer_tag = 2584 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2585 2586#if 0 2587 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2588 "task tag 0x%x, target transfer tag 0x%x", 2589 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2590#endif 2591 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2592 if (cdw == NULL) { 2593 CFISCSI_SESSION_WARN(cs, "failed to " 2594 "allocate memory; dropping connection"); 2595 ctl_set_busy(&io->scsiio); 2596 io->scsiio.be_move_done(io); 2597 cfiscsi_session_terminate(cs); 2598 return; 2599 } 2600 cdw->cdw_ctl_io = io; 2601 cdw->cdw_target_transfer_tag = target_transfer_tag; 2602 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2603 2604 if (cs->cs_immediate_data && io->scsiio.kern_rel_offset < 2605 icl_pdu_data_segment_length(request)) { 2606 done = cfiscsi_handle_data_segment(request, cdw); 2607 if (done) { 2608 uma_zfree(cfiscsi_data_wait_zone, cdw); 2609 io->scsiio.be_move_done(io); 2610 return; 2611 } 2612 } 2613 2614 CFISCSI_SESSION_LOCK(cs); 2615 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2616 CFISCSI_SESSION_UNLOCK(cs); 2617 2618 /* 2619 * XXX: We should limit the number of outstanding R2T PDUs 2620 * per task to MaxOutstandingR2T. 2621 */ 2622 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2623 if (response == NULL) { 2624 CFISCSI_SESSION_WARN(cs, "failed to " 2625 "allocate memory; dropping connection"); 2626 ctl_set_busy(&io->scsiio); 2627 io->scsiio.be_move_done(io); 2628 cfiscsi_session_terminate(cs); 2629 return; 2630 } 2631 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2632 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2633 bhsr2t->bhsr2t_flags = 0x80; 2634 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2635 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2636 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2637 /* 2638 * XXX: Here we assume that cfiscsi_datamove() won't ever 2639 * be running concurrently on several CPUs for a given 2640 * command. 2641 */ 2642 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2643 PDU_R2TSN(request)++; 2644 /* 2645 * This is the offset within the current SCSI command; 2646 * i.e. for the first call of datamove(), it will be 0, 2647 * and for subsequent ones it will be the sum of lengths 2648 * of previous ones. 2649 * 2650 * The ext_data_filled is to account for unsolicited 2651 * (immediate) data that might have already arrived. 2652 */ 2653 bhsr2t->bhsr2t_buffer_offset = 2654 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2655 /* 2656 * This is the total length (sum of S/G lengths) this call 2657 * to cfiscsi_datamove() is supposed to handle. 2658 * 2659 * XXX: Limit it to MaxBurstLength. 2660 */ 2661 bhsr2t->bhsr2t_desired_data_transfer_length = 2662 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2663 cfiscsi_pdu_queue(response); 2664} 2665 2666static void 2667cfiscsi_datamove(union ctl_io *io) 2668{ 2669 2670 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2671 cfiscsi_datamove_in(io); 2672 else 2673 cfiscsi_datamove_out(io); 2674} 2675 2676static void 2677cfiscsi_scsi_command_done(union ctl_io *io) 2678{ 2679 struct icl_pdu *request, *response; 2680 struct iscsi_bhs_scsi_command *bhssc; 2681 struct iscsi_bhs_scsi_response *bhssr; 2682#ifdef DIAGNOSTIC 2683 struct cfiscsi_data_wait *cdw; 2684#endif 2685 struct cfiscsi_session *cs; 2686 uint16_t sense_length; 2687 2688 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2689 cs = PDU_SESSION(request); 2690 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2691 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2692 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2693 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2694 2695 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2696 // bhssc->bhssc_initiator_task_tag); 2697 2698#ifdef DIAGNOSTIC 2699 CFISCSI_SESSION_LOCK(cs); 2700 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2701 KASSERT(bhssc->bhssc_initiator_task_tag != 2702 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2703 CFISCSI_SESSION_UNLOCK(cs); 2704#endif 2705 2706 /* 2707 * Do not return status for aborted commands. 2708 * There are exceptions, but none supported by CTL yet. 2709 */ 2710 if ((io->io_hdr.flags & CTL_FLAG_ABORT) && 2711 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) { 2712 ctl_free_io(io); 2713 icl_pdu_free(request); 2714 return; 2715 } 2716 2717 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2718 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2719 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2720 bhssr->bhssr_flags = 0x80; 2721 /* 2722 * XXX: We don't deal with bidirectional under/overflows; 2723 * does anything actually support those? 2724 */ 2725 if (PDU_TOTAL_TRANSFER_LEN(request) < 2726 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2727 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2728 bhssr->bhssr_residual_count = 2729 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2730 PDU_TOTAL_TRANSFER_LEN(request)); 2731 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2732 // ntohl(bhssr->bhssr_residual_count)); 2733 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2734 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2735 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2736 bhssr->bhssr_residual_count = 2737 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2738 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2739 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2740 // ntohl(bhssr->bhssr_residual_count)); 2741 } 2742 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2743 bhssr->bhssr_status = io->scsiio.scsi_status; 2744 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2745 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2746 2747 if (io->scsiio.sense_len > 0) { 2748#if 0 2749 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2750 io->scsiio.sense_len); 2751#endif 2752 sense_length = htons(io->scsiio.sense_len); 2753 icl_pdu_append_data(response, 2754 &sense_length, sizeof(sense_length), M_WAITOK); 2755 icl_pdu_append_data(response, 2756 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2757 } 2758 2759 ctl_free_io(io); 2760 icl_pdu_free(request); 2761 cfiscsi_pdu_queue(response); 2762} 2763 2764static void 2765cfiscsi_task_management_done(union ctl_io *io) 2766{ 2767 struct icl_pdu *request, *response; 2768 struct iscsi_bhs_task_management_request *bhstmr; 2769 struct iscsi_bhs_task_management_response *bhstmr2; 2770 struct cfiscsi_data_wait *cdw, *tmpcdw; 2771 struct cfiscsi_session *cs; 2772 2773 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2774 cs = PDU_SESSION(request); 2775 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2776 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2777 ISCSI_BHS_OPCODE_TASK_REQUEST, 2778 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2779 2780#if 0 2781 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2782 bhstmr->bhstmr_initiator_task_tag, 2783 bhstmr->bhstmr_referenced_task_tag); 2784#endif 2785 2786 if ((bhstmr->bhstmr_function & ~0x80) == 2787 BHSTMR_FUNCTION_ABORT_TASK) { 2788 /* 2789 * Make sure we no longer wait for Data-Out for this command. 2790 */ 2791 CFISCSI_SESSION_LOCK(cs); 2792 TAILQ_FOREACH_SAFE(cdw, 2793 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2794 if (bhstmr->bhstmr_referenced_task_tag != 2795 cdw->cdw_initiator_task_tag) 2796 continue; 2797 2798#if 0 2799 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2800 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2801#endif 2802 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2803 cdw, cdw_next); 2804 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2805 uma_zfree(cfiscsi_data_wait_zone, cdw); 2806 } 2807 CFISCSI_SESSION_UNLOCK(cs); 2808 } 2809 2810 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2811 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2812 response->ip_bhs; 2813 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2814 bhstmr2->bhstmr_flags = 0x80; 2815 if (io->io_hdr.status == CTL_SUCCESS) { 2816 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2817 } else { 2818 /* 2819 * XXX: How to figure out what exactly went wrong? iSCSI spec 2820 * expects us to provide detailed error, e.g. "Task does 2821 * not exist" or "LUN does not exist". 2822 */ 2823 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2824 bhstmr2->bhstmr_response = 2825 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2826 } 2827 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2828 2829 ctl_free_io(io); 2830 icl_pdu_free(request); 2831 cfiscsi_pdu_queue(response); 2832} 2833 2834static void 2835cfiscsi_done(union ctl_io *io) 2836{ 2837 struct icl_pdu *request; 2838 struct cfiscsi_session *cs; 2839 2840 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2841 ("invalid CTL status %#x", io->io_hdr.status)); 2842 2843 if (io->io_hdr.io_type == CTL_IO_TASK && 2844 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2845 /* 2846 * Implicit task termination has just completed; nothing to do. 2847 */ 2848 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2849 cs->cs_tasks_aborted = true; 2850 refcount_release(&cs->cs_outstanding_ctl_pdus); 2851 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2852 ctl_free_io(io); 2853 return; 2854 } 2855 2856 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2857 cs = PDU_SESSION(request); 2858 refcount_release(&cs->cs_outstanding_ctl_pdus); 2859 2860 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2861 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2862 cfiscsi_scsi_command_done(io); 2863 break; 2864 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2865 cfiscsi_task_management_done(io); 2866 break; 2867 default: 2868 panic("cfiscsi_done called with wrong opcode 0x%x", 2869 request->ip_bhs->bhs_opcode); 2870 } 2871} 2872