ctl_frontend_iscsi.c revision 268328
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 268328 2014-07-06 17:57:59Z mav $ 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 268328 2014-07-06 17:57:59Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capsicum.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include "../../dev/iscsi/icl.h" 71#include "../../dev/iscsi/iscsi_proto.h" 72#include "ctl_frontend_iscsi.h" 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 3; 88SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 89 &debug, 1, "Enable debug messages"); 90static int ping_timeout = 5; 91SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 92 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 93static int login_timeout = 60; 94SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 95 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 96static int maxcmdsn_delta = 256; 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 98 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 99 "without confirmation"); 100 101#define CFISCSI_DEBUG(X, ...) \ 102 do { \ 103 if (debug > 1) { \ 104 printf("%s: " X "\n", \ 105 __func__, ## __VA_ARGS__); \ 106 } \ 107 } while (0) 108 109#define CFISCSI_WARN(X, ...) \ 110 do { \ 111 if (debug > 0) { \ 112 printf("WARNING: %s: " X "\n", \ 113 __func__, ## __VA_ARGS__); \ 114 } \ 115 } while (0) 116 117#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 118 do { \ 119 if (debug > 1) { \ 120 printf("%s: %s (%s): " X "\n", \ 121 __func__, S->cs_initiator_addr, \ 122 S->cs_initiator_name, ## __VA_ARGS__); \ 123 } \ 124 } while (0) 125 126#define CFISCSI_SESSION_WARN(S, X, ...) \ 127 do { \ 128 if (debug > 0) { \ 129 printf("WARNING: %s (%s): " X "\n", \ 130 S->cs_initiator_addr, \ 131 S->cs_initiator_name, ## __VA_ARGS__); \ 132 } \ 133 } while (0) 134 135#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 136#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 137#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 138 139#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 140#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 141#define PDU_EXPDATASN(X) (X)->ip_prv0 142#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 143#define PDU_R2TSN(X) (X)->ip_prv2 144 145int cfiscsi_init(void); 146static void cfiscsi_online(void *arg); 147static void cfiscsi_offline(void *arg); 148static int cfiscsi_info(void *arg, struct sbuf *sb); 149static int cfiscsi_lun_enable(void *arg, 150 struct ctl_id target_id, int lun_id); 151static int cfiscsi_lun_disable(void *arg, 152 struct ctl_id target_id, int lun_id); 153static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 154static int cfiscsi_ioctl(struct cdev *dev, 155 u_long cmd, caddr_t addr, int flag, struct thread *td); 156static void cfiscsi_datamove(union ctl_io *io); 157static void cfiscsi_done(union ctl_io *io); 158static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 159static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 160static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 161static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 162static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 163static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 164static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 165static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 166 *softc, const char *name); 167static struct cfiscsi_target *cfiscsi_target_find_or_create( 168 struct cfiscsi_softc *softc, const char *name, const char *alias); 169static void cfiscsi_target_release(struct cfiscsi_target *ct); 170static void cfiscsi_session_delete(struct cfiscsi_session *cs); 171 172static struct cfiscsi_softc cfiscsi_softc; 173extern struct ctl_softc *control_softc; 174 175static struct ctl_frontend cfiscsi_frontend = 176{ 177 .name = "iscsi", 178 .init = cfiscsi_init, 179 .ioctl = cfiscsi_ioctl, 180}; 181CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 182 183static struct icl_pdu * 184cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 185{ 186 187 return (icl_pdu_new_bhs(request->ip_conn, flags)); 188} 189 190static bool 191cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 192{ 193 const struct iscsi_bhs_scsi_command *bhssc; 194 struct cfiscsi_session *cs; 195 uint32_t cmdsn, expstatsn; 196 197 cs = PDU_SESSION(request); 198 199 /* 200 * Every incoming PDU - not just NOP-Out - resets the ping timer. 201 * The purpose of the timeout is to reset the connection when it stalls; 202 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 203 * in some queue. 204 * 205 * XXX: Locking? 206 */ 207 cs->cs_timeout = 0; 208 209 /* 210 * Data-Out PDUs don't contain CmdSN. 211 */ 212 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 213 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 214 return (false); 215 216 /* 217 * We're only using fields common for all the request 218 * (initiator -> target) PDUs. 219 */ 220 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 221 cmdsn = ntohl(bhssc->bhssc_cmdsn); 222 expstatsn = ntohl(bhssc->bhssc_expstatsn); 223 224 CFISCSI_SESSION_LOCK(cs); 225#if 0 226 if (expstatsn != cs->cs_statsn) { 227 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 228 "while current StatSN is %d", expstatsn, 229 cs->cs_statsn); 230 } 231#endif 232 233 /* 234 * The target MUST silently ignore any non-immediate command outside 235 * of this range. 236 */ 237 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 238 CFISCSI_SESSION_UNLOCK(cs); 239 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 240 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 241 return (true); 242 } 243 244 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 245 cs->cs_cmdsn++; 246 247 CFISCSI_SESSION_UNLOCK(cs); 248 249 return (false); 250} 251 252static void 253cfiscsi_pdu_handle(struct icl_pdu *request) 254{ 255 struct cfiscsi_session *cs; 256 bool ignore; 257 258 cs = PDU_SESSION(request); 259 260 ignore = cfiscsi_pdu_update_cmdsn(request); 261 if (ignore) { 262 icl_pdu_free(request); 263 return; 264 } 265 266 /* 267 * Handle the PDU; this includes e.g. receiving the remaining 268 * part of PDU and submitting the SCSI command to CTL 269 * or queueing a reply. The handling routine is responsible 270 * for freeing the PDU when it's no longer needed. 271 */ 272 switch (request->ip_bhs->bhs_opcode & 273 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 274 case ISCSI_BHS_OPCODE_NOP_OUT: 275 cfiscsi_pdu_handle_nop_out(request); 276 break; 277 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 278 cfiscsi_pdu_handle_scsi_command(request); 279 break; 280 case ISCSI_BHS_OPCODE_TASK_REQUEST: 281 cfiscsi_pdu_handle_task_request(request); 282 break; 283 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 284 cfiscsi_pdu_handle_data_out(request); 285 break; 286 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 287 cfiscsi_pdu_handle_logout_request(request); 288 break; 289 default: 290 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 291 "opcode 0x%x; dropping connection", 292 request->ip_bhs->bhs_opcode); 293 icl_pdu_free(request); 294 cfiscsi_session_terminate(cs); 295 } 296 297} 298 299static void 300cfiscsi_receive_callback(struct icl_pdu *request) 301{ 302 struct cfiscsi_session *cs; 303 304 cs = PDU_SESSION(request); 305 306#ifdef ICL_KERNEL_PROXY 307 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 308 if (cs->cs_login_pdu == NULL) 309 cs->cs_login_pdu = request; 310 else 311 icl_pdu_free(request); 312 cv_signal(&cs->cs_login_cv); 313 return; 314 } 315#endif 316 317 cfiscsi_pdu_handle(request); 318} 319 320static void 321cfiscsi_error_callback(struct icl_conn *ic) 322{ 323 struct cfiscsi_session *cs; 324 325 cs = CONN_SESSION(ic); 326 327 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 328 cfiscsi_session_terminate(cs); 329} 330 331static int 332cfiscsi_pdu_prepare(struct icl_pdu *response) 333{ 334 struct cfiscsi_session *cs; 335 struct iscsi_bhs_scsi_response *bhssr; 336 bool advance_statsn = true; 337 338 cs = PDU_SESSION(response); 339 340 CFISCSI_SESSION_LOCK_ASSERT(cs); 341 342 /* 343 * We're only using fields common for all the response 344 * (target -> initiator) PDUs. 345 */ 346 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 347 348 /* 349 * 10.8.3: "The StatSN for this connection is not advanced 350 * after this PDU is sent." 351 */ 352 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 353 advance_statsn = false; 354 355 /* 356 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 357 * StatSN for the connection is not advanced after this PDU is sent." 358 */ 359 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 360 bhssr->bhssr_initiator_task_tag == 0xffffffff) 361 advance_statsn = false; 362 363 /* 364 * See the comment below - StatSN is not meaningful and must 365 * not be advanced. 366 */ 367 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 368 advance_statsn = false; 369 370 /* 371 * 10.7.3: "The fields StatSN, Status, and Residual Count 372 * only have meaningful content if the S bit is set to 1." 373 */ 374 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 375 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 376 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 377 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 378 379 if (advance_statsn) 380 cs->cs_statsn++; 381 382 return (0); 383} 384 385static void 386cfiscsi_pdu_queue(struct icl_pdu *response) 387{ 388 struct cfiscsi_session *cs; 389 390 cs = PDU_SESSION(response); 391 392 CFISCSI_SESSION_LOCK(cs); 393 cfiscsi_pdu_prepare(response); 394 icl_pdu_queue(response); 395 CFISCSI_SESSION_UNLOCK(cs); 396} 397 398static uint32_t 399cfiscsi_decode_lun(uint64_t encoded) 400{ 401 uint8_t lun[8]; 402 uint32_t result; 403 404 /* 405 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 406 * but is in fact an evil, multidimensional structure defined 407 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 408 */ 409 memcpy(lun, &encoded, sizeof(lun)); 410 switch (lun[0] & 0xC0) { 411 case 0x00: 412 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 413 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 414 CFISCSI_WARN("malformed LUN " 415 "(peripheral device addressing method): 0x%jx", 416 (uintmax_t)encoded); 417 result = 0xffffffff; 418 break; 419 } 420 result = lun[1]; 421 break; 422 case 0x40: 423 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 424 lun[6] != 0 || lun[7] != 0) { 425 CFISCSI_WARN("malformed LUN " 426 "(flat address space addressing method): 0x%jx", 427 (uintmax_t)encoded); 428 result = 0xffffffff; 429 break; 430 } 431 result = ((lun[0] & 0x3f) << 8) + lun[1]; 432 break; 433 case 0xC0: 434 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 435 lun[6] != 0 || lun[7] != 0) { 436 CFISCSI_WARN("malformed LUN (extended flat " 437 "address space addressing method): 0x%jx", 438 (uintmax_t)encoded); 439 result = 0xffffffff; 440 break; 441 } 442 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 443 default: 444 CFISCSI_WARN("unsupported LUN format 0x%jx", 445 (uintmax_t)encoded); 446 result = 0xffffffff; 447 break; 448 } 449 450 return (result); 451} 452 453static void 454cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 455{ 456 struct cfiscsi_session *cs; 457 struct iscsi_bhs_nop_out *bhsno; 458 struct iscsi_bhs_nop_in *bhsni; 459 struct icl_pdu *response; 460 void *data = NULL; 461 size_t datasize; 462 int error; 463 464 cs = PDU_SESSION(request); 465 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 466 467 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 468 /* 469 * Nothing to do, iscsi_pdu_update_statsn() already 470 * zeroed the timeout. 471 */ 472 icl_pdu_free(request); 473 return; 474 } 475 476 datasize = icl_pdu_data_segment_length(request); 477 if (datasize > 0) { 478 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 479 if (data == NULL) { 480 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 481 "dropping connection"); 482 icl_pdu_free(request); 483 cfiscsi_session_terminate(cs); 484 return; 485 } 486 icl_pdu_get_data(request, 0, data, datasize); 487 } 488 489 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 490 if (response == NULL) { 491 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 492 "droppping connection"); 493 free(data, M_CFISCSI); 494 icl_pdu_free(request); 495 cfiscsi_session_terminate(cs); 496 return; 497 } 498 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 499 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 500 bhsni->bhsni_flags = 0x80; 501 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 502 bhsni->bhsni_target_transfer_tag = 0xffffffff; 503 if (datasize > 0) { 504 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 505 if (error != 0) { 506 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 507 "dropping connection"); 508 free(data, M_CFISCSI); 509 icl_pdu_free(request); 510 icl_pdu_free(response); 511 cfiscsi_session_terminate(cs); 512 return; 513 } 514 free(data, M_CFISCSI); 515 } 516 517 icl_pdu_free(request); 518 cfiscsi_pdu_queue(response); 519} 520 521static void 522cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 523{ 524 struct iscsi_bhs_scsi_command *bhssc; 525 struct cfiscsi_session *cs; 526 union ctl_io *io; 527 int error; 528 529 cs = PDU_SESSION(request); 530 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 531 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 532 // bhssc->bhssc_initiator_task_tag); 533 534 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 535 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 536 "ImmediateData=No; dropping connection"); 537 icl_pdu_free(request); 538 cfiscsi_session_terminate(cs); 539 return; 540 } 541 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 542 if (io == NULL) { 543 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 544 "dropping connection"); 545 icl_pdu_free(request); 546 cfiscsi_session_terminate(cs); 547 return; 548 } 549 ctl_zero_io(io); 550 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 551 io->io_hdr.io_type = CTL_IO_SCSI; 552 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 553 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 554 io->io_hdr.nexus.targ_target.id = 0; 555 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 556 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 557 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 558 case BHSSC_FLAGS_ATTR_UNTAGGED: 559 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 560 break; 561 case BHSSC_FLAGS_ATTR_SIMPLE: 562 io->scsiio.tag_type = CTL_TAG_SIMPLE; 563 break; 564 case BHSSC_FLAGS_ATTR_ORDERED: 565 io->scsiio.tag_type = CTL_TAG_ORDERED; 566 break; 567 case BHSSC_FLAGS_ATTR_HOQ: 568 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 569 break; 570 case BHSSC_FLAGS_ATTR_ACA: 571 io->scsiio.tag_type = CTL_TAG_ACA; 572 break; 573 default: 574 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 575 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 576 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 577 break; 578 } 579 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 580 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 581 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 582 error = ctl_queue(io); 583 if (error != CTL_RETVAL_COMPLETE) { 584 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 585 "dropping connection", error); 586 ctl_free_io(io); 587 refcount_release(&cs->cs_outstanding_ctl_pdus); 588 icl_pdu_free(request); 589 cfiscsi_session_terminate(cs); 590 } 591} 592 593static void 594cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 595{ 596 struct iscsi_bhs_task_management_request *bhstmr; 597 struct iscsi_bhs_task_management_response *bhstmr2; 598 struct icl_pdu *response; 599 struct cfiscsi_session *cs; 600 union ctl_io *io; 601 int error; 602 603 cs = PDU_SESSION(request); 604 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 605 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 606 if (io == NULL) { 607 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 608 "dropping connection"); 609 icl_pdu_free(request); 610 cfiscsi_session_terminate(cs); 611 return; 612 } 613 ctl_zero_io(io); 614 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 615 io->io_hdr.io_type = CTL_IO_TASK; 616 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 617 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 618 io->io_hdr.nexus.targ_target.id = 0; 619 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 620 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 621 622 switch (bhstmr->bhstmr_function & ~0x80) { 623 case BHSTMR_FUNCTION_ABORT_TASK: 624#if 0 625 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 626#endif 627 io->taskio.task_action = CTL_TASK_ABORT_TASK; 628 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 629 break; 630 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 631#if 0 632 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 633#endif 634 io->taskio.task_action = CTL_TASK_LUN_RESET; 635 break; 636 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 637#if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 639#endif 640 io->taskio.task_action = CTL_TASK_TARGET_RESET; 641 break; 642 default: 643 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 644 bhstmr->bhstmr_function & ~0x80); 645 ctl_free_io(io); 646 647 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 648 if (response == NULL) { 649 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 650 "dropping connection"); 651 icl_pdu_free(request); 652 cfiscsi_session_terminate(cs); 653 return; 654 } 655 bhstmr2 = (struct iscsi_bhs_task_management_response *) 656 response->ip_bhs; 657 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 658 bhstmr2->bhstmr_flags = 0x80; 659 bhstmr2->bhstmr_response = 660 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 661 bhstmr2->bhstmr_initiator_task_tag = 662 bhstmr->bhstmr_initiator_task_tag; 663 icl_pdu_free(request); 664 cfiscsi_pdu_queue(response); 665 return; 666 } 667 668 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 669 error = ctl_queue(io); 670 if (error != CTL_RETVAL_COMPLETE) { 671 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 672 "dropping connection", error); 673 ctl_free_io(io); 674 refcount_release(&cs->cs_outstanding_ctl_pdus); 675 icl_pdu_free(request); 676 cfiscsi_session_terminate(cs); 677 } 678} 679 680static bool 681cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 682{ 683 struct iscsi_bhs_data_out *bhsdo; 684 struct cfiscsi_session *cs; 685 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 686 size_t copy_len, len, off, buffer_offset; 687 int ctl_sg_count; 688 union ctl_io *io; 689 690 cs = PDU_SESSION(request); 691 692 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 693 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 694 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 695 ISCSI_BHS_OPCODE_SCSI_COMMAND, 696 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 697 698 /* 699 * We're only using fields common for Data-Out and SCSI Command PDUs. 700 */ 701 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 702 703 io = cdw->cdw_ctl_io; 704 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 705 ("CTL_FLAG_DATA_IN")); 706 707#if 0 708 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 709 request->ip_data_len, io->scsiio.kern_total_len); 710#endif 711 712 if (io->scsiio.kern_sg_entries > 0) { 713 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 714 ctl_sg_count = io->scsiio.kern_sg_entries; 715 } else { 716 ctl_sglist = &ctl_sg_entry; 717 ctl_sglist->addr = io->scsiio.kern_data_ptr; 718 ctl_sglist->len = io->scsiio.kern_data_len; 719 ctl_sg_count = 1; 720 } 721 722 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 723 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 724 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 725 else 726 buffer_offset = 0; 727 len = icl_pdu_data_segment_length(request); 728 729 /* 730 * Make sure the offset, as sent by the initiator, matches the offset 731 * we're supposed to be at in the scatter-gather list. 732 */ 733 if (buffer_offset > 734 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 735 buffer_offset + len <= 736 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 737 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 738 "expected %zd; dropping connection", buffer_offset, 739 (size_t)io->scsiio.kern_rel_offset + 740 (size_t)io->scsiio.ext_data_filled); 741 ctl_set_data_phase_error(&io->scsiio); 742 cfiscsi_session_terminate(cs); 743 return (true); 744 } 745 746 /* 747 * This is the offset within the PDU data segment, as opposed 748 * to buffer_offset, which is the offset within the task (SCSI 749 * command). 750 */ 751 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 752 buffer_offset; 753 754 /* 755 * Iterate over the scatter/gather segments, filling them with data 756 * from the PDU data segment. Note that this can get called multiple 757 * times for one SCSI command; the cdw structure holds state for the 758 * scatter/gather list. 759 */ 760 for (;;) { 761 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 762 ("cdw->cdw_sg_index >= ctl_sg_count")); 763 if (cdw->cdw_sg_len == 0) { 764 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 765 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 766 } 767 KASSERT(off <= len, ("len > off")); 768 copy_len = len - off; 769 if (copy_len > cdw->cdw_sg_len) 770 copy_len = cdw->cdw_sg_len; 771 772 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 773 cdw->cdw_sg_addr += copy_len; 774 cdw->cdw_sg_len -= copy_len; 775 off += copy_len; 776 io->scsiio.ext_data_filled += copy_len; 777 778 if (cdw->cdw_sg_len == 0) { 779 /* 780 * End of current segment. 781 */ 782 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 783 /* 784 * Last segment in scatter/gather list. 785 */ 786 break; 787 } 788 cdw->cdw_sg_index++; 789 } 790 791 if (off == len) { 792 /* 793 * End of PDU payload. 794 */ 795 break; 796 } 797 } 798 799 if (len > off) { 800 /* 801 * In case of unsolicited data, it's possible that the buffer 802 * provided by CTL is smaller than negotiated FirstBurstLength. 803 * Just ignore the superfluous data; will ask for them with R2T 804 * on next call to cfiscsi_datamove(). 805 * 806 * This obviously can only happen with SCSI Command PDU. 807 */ 808 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 809 ISCSI_BHS_OPCODE_SCSI_COMMAND) 810 return (true); 811 812 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 813 "expected %zd; dropping connection", 814 icl_pdu_data_segment_length(request), off); 815 ctl_set_data_phase_error(&io->scsiio); 816 cfiscsi_session_terminate(cs); 817 return (true); 818 } 819 820 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len && 821 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 822 CFISCSI_SESSION_WARN(cs, "got the final packet without " 823 "the F flag; flags = 0x%x; dropping connection", 824 bhsdo->bhsdo_flags); 825 ctl_set_data_phase_error(&io->scsiio); 826 cfiscsi_session_terminate(cs); 827 return (true); 828 } 829 830 if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len && 831 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 832 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 833 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 834 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 835 "transmitted size was %zd bytes instead of %d; " 836 "dropping connection", 837 (size_t)io->scsiio.ext_data_filled, 838 io->scsiio.kern_data_len); 839 ctl_set_data_phase_error(&io->scsiio); 840 cfiscsi_session_terminate(cs); 841 return (true); 842 } else { 843 /* 844 * For SCSI Command PDU, this just means we need to 845 * solicit more data by sending R2T. 846 */ 847 return (false); 848 } 849 } 850 851 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) { 852#if 0 853 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 854 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 855#endif 856 857 return (true); 858 } 859 860 return (false); 861} 862 863static void 864cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 865{ 866 struct iscsi_bhs_data_out *bhsdo; 867 struct cfiscsi_session *cs; 868 struct cfiscsi_data_wait *cdw = NULL; 869 union ctl_io *io; 870 bool done; 871 872 cs = PDU_SESSION(request); 873 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 874 875 CFISCSI_SESSION_LOCK(cs); 876 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 877#if 0 878 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 879 "ttt 0x%x, itt 0x%x", 880 bhsdo->bhsdo_target_transfer_tag, 881 bhsdo->bhsdo_initiator_task_tag, 882 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 883#endif 884 if (bhsdo->bhsdo_target_transfer_tag == 885 cdw->cdw_target_transfer_tag) 886 break; 887 } 888 CFISCSI_SESSION_UNLOCK(cs); 889 if (cdw == NULL) { 890 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 891 "0x%x, not found; dropping connection", 892 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 893 icl_pdu_free(request); 894 cfiscsi_session_terminate(cs); 895 return; 896 } 897 898 io = cdw->cdw_ctl_io; 899 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 900 ("CTL_FLAG_DATA_IN")); 901 902 done = cfiscsi_handle_data_segment(request, cdw); 903 if (done) { 904 CFISCSI_SESSION_LOCK(cs); 905 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 906 CFISCSI_SESSION_UNLOCK(cs); 907 uma_zfree(cfiscsi_data_wait_zone, cdw); 908 io->scsiio.be_move_done(io); 909 } 910 911 icl_pdu_free(request); 912} 913 914static void 915cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 916{ 917 struct iscsi_bhs_logout_request *bhslr; 918 struct iscsi_bhs_logout_response *bhslr2; 919 struct icl_pdu *response; 920 struct cfiscsi_session *cs; 921 922 cs = PDU_SESSION(request); 923 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 924 switch (bhslr->bhslr_reason & 0x7f) { 925 case BHSLR_REASON_CLOSE_SESSION: 926 case BHSLR_REASON_CLOSE_CONNECTION: 927 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 928 if (response == NULL) { 929 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 930 icl_pdu_free(request); 931 cfiscsi_session_terminate(cs); 932 return; 933 } 934 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 935 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 936 bhslr2->bhslr_flags = 0x80; 937 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 938 bhslr2->bhslr_initiator_task_tag = 939 bhslr->bhslr_initiator_task_tag; 940 icl_pdu_free(request); 941 cfiscsi_pdu_queue(response); 942 cfiscsi_session_terminate(cs); 943 break; 944 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 945 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 946 if (response == NULL) { 947 CFISCSI_SESSION_WARN(cs, 948 "failed to allocate memory; dropping connection"); 949 icl_pdu_free(request); 950 cfiscsi_session_terminate(cs); 951 return; 952 } 953 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 954 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 955 bhslr2->bhslr_flags = 0x80; 956 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 957 bhslr2->bhslr_initiator_task_tag = 958 bhslr->bhslr_initiator_task_tag; 959 icl_pdu_free(request); 960 cfiscsi_pdu_queue(response); 961 break; 962 default: 963 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 964 bhslr->bhslr_reason); 965 icl_pdu_free(request); 966 cfiscsi_session_terminate(cs); 967 break; 968 } 969} 970 971static void 972cfiscsi_callout(void *context) 973{ 974 struct icl_pdu *cp; 975 struct iscsi_bhs_nop_in *bhsni; 976 struct cfiscsi_session *cs; 977 978 cs = context; 979 980 if (cs->cs_terminating) 981 return; 982 983 callout_schedule(&cs->cs_callout, 1 * hz); 984 985 atomic_add_int(&cs->cs_timeout, 1); 986 987#ifdef ICL_KERNEL_PROXY 988 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 989 if (cs->cs_timeout > login_timeout) { 990 CFISCSI_SESSION_WARN(cs, "login timed out after " 991 "%d seconds; dropping connection", cs->cs_timeout); 992 cfiscsi_session_terminate(cs); 993 } 994 return; 995 } 996#endif 997 998 if (cs->cs_timeout >= ping_timeout) { 999 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1000 "dropping connection", ping_timeout); 1001 cfiscsi_session_terminate(cs); 1002 return; 1003 } 1004 1005 /* 1006 * If the ping was reset less than one second ago - which means 1007 * that we've received some PDU during the last second - assume 1008 * the traffic flows correctly and don't bother sending a NOP-Out. 1009 * 1010 * (It's 2 - one for one second, and one for incrementing is_timeout 1011 * earlier in this routine.) 1012 */ 1013 if (cs->cs_timeout < 2) 1014 return; 1015 1016 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1017 if (cp == NULL) { 1018 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1019 return; 1020 } 1021 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1022 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1023 bhsni->bhsni_flags = 0x80; 1024 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1025 1026 cfiscsi_pdu_queue(cp); 1027} 1028 1029static void 1030cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1031{ 1032 struct cfiscsi_data_wait *cdw, *tmpcdw; 1033 union ctl_io *io; 1034 int error, last; 1035 1036#ifdef notyet 1037 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1038 if (io == NULL) { 1039 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1040 return; 1041 } 1042 ctl_zero_io(io); 1043 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1044 io->io_hdr.io_type = CTL_IO_TASK; 1045 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1046 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1047 io->io_hdr.nexus.targ_target.id = 0; 1048 io->io_hdr.nexus.targ_lun = lun; 1049 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1050 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1051 error = ctl_queue(io); 1052 if (error != CTL_RETVAL_COMPLETE) { 1053 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1054 ctl_free_io(io); 1055 } 1056#else 1057 /* 1058 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1059 * just iterate over tasks that are waiting for something - data - and 1060 * terminate those. 1061 */ 1062 CFISCSI_SESSION_LOCK(cs); 1063 TAILQ_FOREACH_SAFE(cdw, 1064 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1065 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1066 if (io == NULL) { 1067 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1068 return; 1069 } 1070 ctl_zero_io(io); 1071 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1072 io->io_hdr.io_type = CTL_IO_TASK; 1073 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1074 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1075 io->io_hdr.nexus.targ_target.id = 0; 1076 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1077 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1078 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1079 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1080 error = ctl_queue(io); 1081 if (error != CTL_RETVAL_COMPLETE) { 1082 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1083 ctl_free_io(io); 1084 return; 1085 } 1086#if 0 1087 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1088 "0x%x", cdw->cdw_initiator_task_tag); 1089#endif 1090 /* 1091 * Set nonzero port status; this prevents backends from 1092 * assuming that the data transfer actually succeeded 1093 * and writing uninitialized data to disk. 1094 */ 1095 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1096 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1097 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1098 uma_zfree(cfiscsi_data_wait_zone, cdw); 1099 } 1100 CFISCSI_SESSION_UNLOCK(cs); 1101#endif 1102 1103 /* 1104 * Wait for CTL to terminate all the tasks. 1105 */ 1106 for (;;) { 1107 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1108 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1109 if (last != 0) 1110 break; 1111 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, " 1112 "%d remaining", cs->cs_outstanding_ctl_pdus); 1113 pause("cfiscsi_terminate", 1); 1114 } 1115} 1116 1117static void 1118cfiscsi_maintenance_thread(void *arg) 1119{ 1120 struct cfiscsi_session *cs; 1121 1122 cs = arg; 1123 1124 for (;;) { 1125 CFISCSI_SESSION_LOCK(cs); 1126 if (cs->cs_terminating == false) 1127 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1128 CFISCSI_SESSION_UNLOCK(cs); 1129 1130 if (cs->cs_terminating) { 1131 1132 /* 1133 * We used to wait up to 30 seconds to deliver queued 1134 * PDUs to the initiator. We also tried hard to deliver 1135 * SCSI Responses for the aborted PDUs. We don't do 1136 * that anymore. We might need to revisit that. 1137 */ 1138 callout_drain(&cs->cs_callout); 1139 icl_conn_shutdown(cs->cs_conn); 1140 icl_conn_close(cs->cs_conn); 1141 1142 /* 1143 * At this point ICL receive thread is no longer 1144 * running; no new tasks can be queued. 1145 */ 1146 cfiscsi_session_terminate_tasks(cs); 1147 cfiscsi_session_delete(cs); 1148 kthread_exit(); 1149 return; 1150 } 1151 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1152 } 1153} 1154 1155static void 1156cfiscsi_session_terminate(struct cfiscsi_session *cs) 1157{ 1158 1159 if (cs->cs_terminating) 1160 return; 1161 cs->cs_terminating = true; 1162 cv_signal(&cs->cs_maintenance_cv); 1163#ifdef ICL_KERNEL_PROXY 1164 cv_signal(&cs->cs_login_cv); 1165#endif 1166} 1167 1168static int 1169cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1170{ 1171 int error, i; 1172 struct cfiscsi_softc *softc; 1173 1174 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1175 1176 softc = &cfiscsi_softc; 1177 1178 mtx_lock(&softc->lock); 1179 for (i = 0; i < softc->max_initiators; i++) { 1180 if (softc->ctl_initids[i] == 0) 1181 break; 1182 } 1183 if (i == softc->max_initiators) { 1184 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1185 softc->max_initiators); 1186 mtx_unlock(&softc->lock); 1187 return (1); 1188 } 1189 softc->ctl_initids[i] = 1; 1190 mtx_unlock(&softc->lock); 1191 1192#if 0 1193 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1194 i, softc->max_initiators); 1195#endif 1196 cs->cs_ctl_initid = i; 1197 error = ctl_add_initiator(0x0, cs->cs_target->ct_port.targ_port, cs->cs_ctl_initid); 1198 if (error != 0) { 1199 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1200 mtx_lock(&softc->lock); 1201 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1202 mtx_unlock(&softc->lock); 1203 cs->cs_ctl_initid = -1; 1204 return (1); 1205 } 1206 1207 return (0); 1208} 1209 1210static void 1211cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1212{ 1213 int error; 1214 struct cfiscsi_softc *softc; 1215 1216 if (cs->cs_ctl_initid == -1) 1217 return; 1218 1219 softc = &cfiscsi_softc; 1220 1221 error = ctl_remove_initiator(cs->cs_target->ct_port.targ_port, cs->cs_ctl_initid); 1222 if (error != 0) { 1223 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1224 error); 1225 } 1226 mtx_lock(&softc->lock); 1227 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1228 mtx_unlock(&softc->lock); 1229 cs->cs_ctl_initid = -1; 1230} 1231 1232static struct cfiscsi_session * 1233cfiscsi_session_new(struct cfiscsi_softc *softc) 1234{ 1235 struct cfiscsi_session *cs; 1236 int error; 1237 1238 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1239 if (cs == NULL) { 1240 CFISCSI_WARN("malloc failed"); 1241 return (NULL); 1242 } 1243 cs->cs_ctl_initid = -1; 1244 1245 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1246 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1247 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1248 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1249#ifdef ICL_KERNEL_PROXY 1250 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1251#endif 1252 1253 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1254 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1255 cs->cs_conn->ic_error = cfiscsi_error_callback; 1256 cs->cs_conn->ic_prv0 = cs; 1257 1258 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1259 if (error != 0) { 1260 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1261 free(cs, M_CFISCSI); 1262 return (NULL); 1263 } 1264 1265 mtx_lock(&softc->lock); 1266 cs->cs_id = softc->last_session_id + 1; 1267 softc->last_session_id++; 1268 mtx_unlock(&softc->lock); 1269 1270 mtx_lock(&softc->lock); 1271 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1272 mtx_unlock(&softc->lock); 1273 1274 /* 1275 * Start pinging the initiator. 1276 */ 1277 callout_init(&cs->cs_callout, 1); 1278 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1279 1280 return (cs); 1281} 1282 1283static void 1284cfiscsi_session_delete(struct cfiscsi_session *cs) 1285{ 1286 struct cfiscsi_softc *softc; 1287 1288 softc = &cfiscsi_softc; 1289 1290 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1291 ("destroying session with outstanding CTL pdus")); 1292 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1293 ("destroying session with non-empty queue")); 1294 1295 cfiscsi_session_unregister_initiator(cs); 1296 if (cs->cs_target != NULL) 1297 cfiscsi_target_release(cs->cs_target); 1298 icl_conn_close(cs->cs_conn); 1299 icl_conn_free(cs->cs_conn); 1300 1301 mtx_lock(&softc->lock); 1302 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1303 mtx_unlock(&softc->lock); 1304 1305 free(cs, M_CFISCSI); 1306} 1307 1308int 1309cfiscsi_init(void) 1310{ 1311 struct cfiscsi_softc *softc; 1312 int retval; 1313 1314 softc = &cfiscsi_softc; 1315 retval = 0; 1316 bzero(softc, sizeof(*softc)); 1317 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1318 1319#ifdef ICL_KERNEL_PROXY 1320 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1321#endif 1322 TAILQ_INIT(&softc->sessions); 1323 TAILQ_INIT(&softc->targets); 1324 1325 softc->max_initiators = CTL_MAX_INIT_PER_PORT; 1326 1327 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1328 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1329 UMA_ALIGN_PTR, 0); 1330 1331 return (0); 1332} 1333 1334#ifdef ICL_KERNEL_PROXY 1335static void 1336cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1337{ 1338 struct cfiscsi_session *cs; 1339 1340 cs = cfiscsi_session_new(&cfiscsi_softc); 1341 if (cs == NULL) { 1342 CFISCSI_WARN("failed to create session"); 1343 return; 1344 } 1345 1346 icl_conn_handoff_sock(cs->cs_conn, so); 1347 cs->cs_initiator_sa = sa; 1348 cs->cs_portal_id = portal_id; 1349 cs->cs_waiting_for_ctld = true; 1350 cv_signal(&cfiscsi_softc.accept_cv); 1351} 1352#endif 1353 1354static void 1355cfiscsi_online(void *arg) 1356{ 1357 struct cfiscsi_softc *softc; 1358 struct cfiscsi_target *ct; 1359 int online; 1360 1361 ct = (struct cfiscsi_target *)arg; 1362 softc = ct->ct_softc; 1363 1364 mtx_lock(&softc->lock); 1365 if (ct->ct_online) { 1366 mtx_unlock(&softc->lock); 1367 return; 1368 } 1369 ct->ct_online = 1; 1370 online = softc->online++; 1371 mtx_unlock(&softc->lock); 1372 if (online > 0) 1373 return; 1374 1375#ifdef ICL_KERNEL_PROXY 1376 if (softc->listener != NULL) 1377 icl_listen_free(softc->listener); 1378 softc->listener = icl_listen_new(cfiscsi_accept); 1379#endif 1380} 1381 1382static void 1383cfiscsi_offline(void *arg) 1384{ 1385 struct cfiscsi_softc *softc; 1386 struct cfiscsi_target *ct; 1387 struct cfiscsi_session *cs; 1388 int online; 1389 1390 ct = (struct cfiscsi_target *)arg; 1391 softc = ct->ct_softc; 1392 1393 mtx_lock(&softc->lock); 1394 if (!ct->ct_online) { 1395 mtx_unlock(&softc->lock); 1396 return; 1397 } 1398 ct->ct_online = 0; 1399 online = --softc->online; 1400 1401 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1402 if (cs->cs_target == ct) 1403 cfiscsi_session_terminate(cs); 1404 } 1405 mtx_unlock(&softc->lock); 1406 if (online > 0) 1407 return; 1408 1409#ifdef ICL_KERNEL_PROXY 1410 icl_listen_free(softc->listener); 1411 softc->listener = NULL; 1412#endif 1413} 1414 1415static int 1416cfiscsi_info(void *arg, struct sbuf *sb) 1417{ 1418 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1419 int retval; 1420 1421 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1422 ct->ct_state); 1423 return (retval); 1424} 1425 1426static void 1427cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1428{ 1429 struct cfiscsi_softc *softc; 1430 struct cfiscsi_session *cs; 1431 struct cfiscsi_target *ct; 1432 struct ctl_iscsi_handoff_params *cihp; 1433 int error; 1434 1435 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1436 softc = &cfiscsi_softc; 1437 1438 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1439 cihp->initiator_name, cihp->initiator_addr, 1440 cihp->target_name); 1441 1442 ct = cfiscsi_target_find(softc, cihp->target_name); 1443 if (ct == NULL) { 1444 ci->status = CTL_ISCSI_ERROR; 1445 snprintf(ci->error_str, sizeof(ci->error_str), 1446 "%s: target not found", __func__); 1447 return; 1448 } 1449 1450 if (ct->ct_online == 0) { 1451 ci->status = CTL_ISCSI_ERROR; 1452 snprintf(ci->error_str, sizeof(ci->error_str), 1453 "%s: port offline", __func__); 1454 cfiscsi_target_release(ct); 1455 return; 1456 } 1457 1458#ifdef ICL_KERNEL_PROXY 1459 if (cihp->socket > 0 && cihp->connection_id > 0) { 1460 snprintf(ci->error_str, sizeof(ci->error_str), 1461 "both socket and connection_id set"); 1462 ci->status = CTL_ISCSI_ERROR; 1463 cfiscsi_target_release(ct); 1464 return; 1465 } 1466 if (cihp->socket == 0) { 1467 mtx_lock(&cfiscsi_softc.lock); 1468 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1469 if (cs->cs_id == cihp->socket) 1470 break; 1471 } 1472 if (cs == NULL) { 1473 mtx_unlock(&cfiscsi_softc.lock); 1474 snprintf(ci->error_str, sizeof(ci->error_str), 1475 "connection not found"); 1476 ci->status = CTL_ISCSI_ERROR; 1477 cfiscsi_target_release(ct); 1478 return; 1479 } 1480 mtx_unlock(&cfiscsi_softc.lock); 1481 } else { 1482#endif 1483 cs = cfiscsi_session_new(softc); 1484 if (cs == NULL) { 1485 ci->status = CTL_ISCSI_ERROR; 1486 snprintf(ci->error_str, sizeof(ci->error_str), 1487 "%s: cfiscsi_session_new failed", __func__); 1488 cfiscsi_target_release(ct); 1489 return; 1490 } 1491#ifdef ICL_KERNEL_PROXY 1492 } 1493#endif 1494 cs->cs_target = ct; 1495 1496 /* 1497 * First PDU of Full Feature phase has the same CmdSN as the last 1498 * PDU from the Login Phase received from the initiator. Thus, 1499 * the -1 below. 1500 */ 1501 cs->cs_portal_group_tag = cihp->portal_group_tag; 1502 cs->cs_cmdsn = cihp->cmdsn; 1503 cs->cs_statsn = cihp->statsn; 1504 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1505 cs->cs_max_burst_length = cihp->max_burst_length; 1506 cs->cs_immediate_data = !!cihp->immediate_data; 1507 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1508 cs->cs_conn->ic_header_crc32c = true; 1509 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1510 cs->cs_conn->ic_data_crc32c = true; 1511 1512 strlcpy(cs->cs_initiator_name, 1513 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1514 strlcpy(cs->cs_initiator_addr, 1515 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1516 strlcpy(cs->cs_initiator_alias, 1517 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1518 memcpy(cs->cs_initiator_isid, 1519 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1520 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1521 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1522 cihp->initiator_isid[0], cihp->initiator_isid[1], 1523 cihp->initiator_isid[2], cihp->initiator_isid[3], 1524 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1525 1526#ifdef ICL_KERNEL_PROXY 1527 if (cihp->socket > 0) { 1528#endif 1529 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1530 if (error != 0) { 1531 cfiscsi_session_delete(cs); 1532 ci->status = CTL_ISCSI_ERROR; 1533 snprintf(ci->error_str, sizeof(ci->error_str), 1534 "%s: icl_conn_handoff failed with error %d", 1535 __func__, error); 1536 return; 1537 } 1538#ifdef ICL_KERNEL_PROXY 1539 } 1540#endif 1541 1542 /* 1543 * Register initiator with CTL. 1544 */ 1545 cfiscsi_session_register_initiator(cs); 1546 1547#ifdef ICL_KERNEL_PROXY 1548 cs->cs_login_phase = false; 1549 1550 /* 1551 * First PDU of the Full Feature phase has likely already arrived. 1552 * We have to pick it up and execute properly. 1553 */ 1554 if (cs->cs_login_pdu != NULL) { 1555 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1556 cfiscsi_pdu_handle(cs->cs_login_pdu); 1557 cs->cs_login_pdu = NULL; 1558 } 1559#endif 1560 1561 ci->status = CTL_ISCSI_OK; 1562} 1563 1564static void 1565cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1566{ 1567 struct ctl_iscsi_list_params *cilp; 1568 struct cfiscsi_session *cs; 1569 struct cfiscsi_softc *softc; 1570 struct sbuf *sb; 1571 int error; 1572 1573 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1574 softc = &cfiscsi_softc; 1575 1576 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1577 if (sb == NULL) { 1578 ci->status = CTL_ISCSI_ERROR; 1579 snprintf(ci->error_str, sizeof(ci->error_str), 1580 "Unable to allocate %d bytes for iSCSI session list", 1581 cilp->alloc_len); 1582 return; 1583 } 1584 1585 sbuf_printf(sb, "<ctlislist>\n"); 1586 mtx_lock(&softc->lock); 1587 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1588#ifdef ICL_KERNEL_PROXY 1589 if (cs->cs_target == NULL) 1590 continue; 1591#endif 1592 error = sbuf_printf(sb, "<connection id=\"%d\">" 1593 "<initiator>%s</initiator>" 1594 "<initiator_addr>%s</initiator_addr>" 1595 "<initiator_alias>%s</initiator_alias>" 1596 "<target>%s</target>" 1597 "<target_alias>%s</target_alias>" 1598 "<header_digest>%s</header_digest>" 1599 "<data_digest>%s</data_digest>" 1600 "<max_data_segment_length>%zd</max_data_segment_length>" 1601 "<immediate_data>%d</immediate_data>" 1602 "<iser>%d</iser>" 1603 "</connection>\n", 1604 cs->cs_id, 1605 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1606 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1607 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1608 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1609 cs->cs_max_data_segment_length, 1610 cs->cs_immediate_data, 1611 cs->cs_conn->ic_iser); 1612 if (error != 0) 1613 break; 1614 } 1615 mtx_unlock(&softc->lock); 1616 error = sbuf_printf(sb, "</ctlislist>\n"); 1617 if (error != 0) { 1618 sbuf_delete(sb); 1619 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1620 snprintf(ci->error_str, sizeof(ci->error_str), 1621 "Out of space, %d bytes is too small", cilp->alloc_len); 1622 return; 1623 } 1624 sbuf_finish(sb); 1625 1626 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1627 cilp->fill_len = sbuf_len(sb) + 1; 1628 ci->status = CTL_ISCSI_OK; 1629 sbuf_delete(sb); 1630} 1631 1632static void 1633cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1634{ 1635 struct icl_pdu *response; 1636 struct iscsi_bhs_asynchronous_message *bhsam; 1637 struct ctl_iscsi_terminate_params *citp; 1638 struct cfiscsi_session *cs; 1639 struct cfiscsi_softc *softc; 1640 int found = 0; 1641 1642 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1643 softc = &cfiscsi_softc; 1644 1645 mtx_lock(&softc->lock); 1646 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1647 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1648 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1649 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1650 continue; 1651 1652 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1653 if (response == NULL) { 1654 /* 1655 * Oh well. Just terminate the connection. 1656 */ 1657 } else { 1658 bhsam = (struct iscsi_bhs_asynchronous_message *) 1659 response->ip_bhs; 1660 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1661 bhsam->bhsam_flags = 0x80; 1662 bhsam->bhsam_0xffffffff = 0xffffffff; 1663 bhsam->bhsam_async_event = 1664 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1665 cfiscsi_pdu_queue(response); 1666 } 1667 cfiscsi_session_terminate(cs); 1668 found++; 1669 } 1670 mtx_unlock(&softc->lock); 1671 1672 if (found == 0) { 1673 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1674 snprintf(ci->error_str, sizeof(ci->error_str), 1675 "No matching connections found"); 1676 return; 1677 } 1678 1679 ci->status = CTL_ISCSI_OK; 1680} 1681 1682static void 1683cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1684{ 1685 struct icl_pdu *response; 1686 struct iscsi_bhs_asynchronous_message *bhsam; 1687 struct ctl_iscsi_logout_params *cilp; 1688 struct cfiscsi_session *cs; 1689 struct cfiscsi_softc *softc; 1690 int found = 0; 1691 1692 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1693 softc = &cfiscsi_softc; 1694 1695 mtx_lock(&softc->lock); 1696 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1697 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1698 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1699 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1700 continue; 1701 1702 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1703 if (response == NULL) { 1704 ci->status = CTL_ISCSI_ERROR; 1705 snprintf(ci->error_str, sizeof(ci->error_str), 1706 "Unable to allocate memory"); 1707 mtx_unlock(&softc->lock); 1708 return; 1709 } 1710 bhsam = 1711 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1712 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1713 bhsam->bhsam_flags = 0x80; 1714 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1715 bhsam->bhsam_parameter3 = htons(10); 1716 cfiscsi_pdu_queue(response); 1717 found++; 1718 } 1719 mtx_unlock(&softc->lock); 1720 1721 if (found == 0) { 1722 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1723 snprintf(ci->error_str, sizeof(ci->error_str), 1724 "No matching connections found"); 1725 return; 1726 } 1727 1728 ci->status = CTL_ISCSI_OK; 1729} 1730 1731#ifdef ICL_KERNEL_PROXY 1732static void 1733cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1734{ 1735 struct ctl_iscsi_listen_params *cilp; 1736 struct sockaddr *sa; 1737 int error; 1738 1739 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1740 1741 if (cfiscsi_softc.listener == NULL) { 1742 CFISCSI_DEBUG("no listener"); 1743 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1744 ci->status = CTL_ISCSI_ERROR; 1745 return; 1746 } 1747 1748 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1749 if (error != 0) { 1750 CFISCSI_DEBUG("getsockaddr, error %d", error); 1751 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1752 ci->status = CTL_ISCSI_ERROR; 1753 return; 1754 } 1755 1756 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1757 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1758 if (error != 0) { 1759 free(sa, M_SONAME); 1760 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1761 snprintf(ci->error_str, sizeof(ci->error_str), 1762 "icl_listen_add failed, error %d", error); 1763 ci->status = CTL_ISCSI_ERROR; 1764 return; 1765 } 1766 1767 ci->status = CTL_ISCSI_OK; 1768} 1769 1770static void 1771cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1772{ 1773 struct ctl_iscsi_accept_params *ciap; 1774 struct cfiscsi_session *cs; 1775 int error; 1776 1777 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1778 1779 mtx_lock(&cfiscsi_softc.lock); 1780 for (;;) { 1781 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1782 if (cs->cs_waiting_for_ctld) 1783 break; 1784 } 1785 if (cs != NULL) 1786 break; 1787 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1788 if (error != 0) { 1789 mtx_unlock(&cfiscsi_softc.lock); 1790 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1791 ci->status = CTL_ISCSI_ERROR; 1792 return; 1793 } 1794 } 1795 mtx_unlock(&cfiscsi_softc.lock); 1796 1797 cs->cs_waiting_for_ctld = false; 1798 cs->cs_login_phase = true; 1799 1800 ciap->connection_id = cs->cs_id; 1801 ciap->portal_id = cs->cs_portal_id; 1802 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1803 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1804 cs->cs_initiator_sa->sa_len); 1805 if (error != 0) { 1806 snprintf(ci->error_str, sizeof(ci->error_str), 1807 "copyout failed with error %d", error); 1808 ci->status = CTL_ISCSI_ERROR; 1809 return; 1810 } 1811 1812 ci->status = CTL_ISCSI_OK; 1813} 1814 1815static void 1816cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1817{ 1818 struct ctl_iscsi_send_params *cisp; 1819 struct cfiscsi_session *cs; 1820 struct icl_pdu *ip; 1821 size_t datalen; 1822 void *data; 1823 int error; 1824 1825 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1826 1827 mtx_lock(&cfiscsi_softc.lock); 1828 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1829 if (cs->cs_id == cisp->connection_id) 1830 break; 1831 } 1832 if (cs == NULL) { 1833 mtx_unlock(&cfiscsi_softc.lock); 1834 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1835 ci->status = CTL_ISCSI_ERROR; 1836 return; 1837 } 1838 mtx_unlock(&cfiscsi_softc.lock); 1839 1840#if 0 1841 if (cs->cs_login_phase == false) 1842 return (EBUSY); 1843#endif 1844 1845 if (cs->cs_terminating) { 1846 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1847 ci->status = CTL_ISCSI_ERROR; 1848 return; 1849 } 1850 1851 datalen = cisp->data_segment_len; 1852 /* 1853 * XXX 1854 */ 1855 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1856 if (datalen > 65535) { 1857 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1858 ci->status = CTL_ISCSI_ERROR; 1859 return; 1860 } 1861 if (datalen > 0) { 1862 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1863 error = copyin(cisp->data_segment, data, datalen); 1864 if (error != 0) { 1865 free(data, M_CFISCSI); 1866 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1867 ci->status = CTL_ISCSI_ERROR; 1868 return; 1869 } 1870 } 1871 1872 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1873 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1874 if (datalen > 0) { 1875 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1876 free(data, M_CFISCSI); 1877 } 1878 CFISCSI_SESSION_LOCK(cs); 1879 icl_pdu_queue(ip); 1880 CFISCSI_SESSION_UNLOCK(cs); 1881 ci->status = CTL_ISCSI_OK; 1882} 1883 1884static void 1885cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1886{ 1887 struct ctl_iscsi_receive_params *cirp; 1888 struct cfiscsi_session *cs; 1889 struct icl_pdu *ip; 1890 void *data; 1891 int error; 1892 1893 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1894 1895 mtx_lock(&cfiscsi_softc.lock); 1896 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1897 if (cs->cs_id == cirp->connection_id) 1898 break; 1899 } 1900 if (cs == NULL) { 1901 mtx_unlock(&cfiscsi_softc.lock); 1902 snprintf(ci->error_str, sizeof(ci->error_str), 1903 "connection not found"); 1904 ci->status = CTL_ISCSI_ERROR; 1905 return; 1906 } 1907 mtx_unlock(&cfiscsi_softc.lock); 1908 1909#if 0 1910 if (is->is_login_phase == false) 1911 return (EBUSY); 1912#endif 1913 1914 CFISCSI_SESSION_LOCK(cs); 1915 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1916 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1917 if (error != 0) { 1918 CFISCSI_SESSION_UNLOCK(cs); 1919 snprintf(ci->error_str, sizeof(ci->error_str), 1920 "interrupted by signal"); 1921 ci->status = CTL_ISCSI_ERROR; 1922 return; 1923 } 1924 } 1925 1926 if (cs->cs_terminating) { 1927 CFISCSI_SESSION_UNLOCK(cs); 1928 snprintf(ci->error_str, sizeof(ci->error_str), 1929 "connection terminating"); 1930 ci->status = CTL_ISCSI_ERROR; 1931 return; 1932 } 1933 ip = cs->cs_login_pdu; 1934 cs->cs_login_pdu = NULL; 1935 CFISCSI_SESSION_UNLOCK(cs); 1936 1937 if (ip->ip_data_len > cirp->data_segment_len) { 1938 icl_pdu_free(ip); 1939 snprintf(ci->error_str, sizeof(ci->error_str), 1940 "data segment too big"); 1941 ci->status = CTL_ISCSI_ERROR; 1942 return; 1943 } 1944 1945 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1946 if (ip->ip_data_len > 0) { 1947 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1948 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1949 copyout(data, cirp->data_segment, ip->ip_data_len); 1950 free(data, M_CFISCSI); 1951 } 1952 1953 icl_pdu_free(ip); 1954 ci->status = CTL_ISCSI_OK; 1955} 1956 1957#endif /* !ICL_KERNEL_PROXY */ 1958 1959static void 1960cfiscsi_ioctl_port_create(struct ctl_req *req) 1961{ 1962 struct cfiscsi_target *ct; 1963 struct ctl_port *port; 1964 const char *target, *alias, *tag; 1965 struct scsi_vpd_id_descriptor *desc; 1966 ctl_options_t opts; 1967 int retval, len, idlen; 1968 1969 ctl_init_opts(&opts, req->num_args, req->kern_args); 1970 target = ctl_get_opt(&opts, "cfiscsi_target"); 1971 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1972 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1973 if (target == NULL || tag == NULL) { 1974 ctl_free_opts(&opts); 1975 req->status = CTL_LUN_ERROR; 1976 snprintf(req->error_str, sizeof(req->error_str), 1977 "Missing required argument"); 1978 return; 1979 } 1980 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1981 if (ct == NULL) { 1982 ctl_free_opts(&opts); 1983 req->status = CTL_LUN_ERROR; 1984 snprintf(req->error_str, sizeof(req->error_str), 1985 "failed to create target \"%s\"", target); 1986 return; 1987 } 1988 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1989 cfiscsi_target_release(ct); 1990 ctl_free_opts(&opts); 1991 req->status = CTL_LUN_ERROR; 1992 snprintf(req->error_str, sizeof(req->error_str), 1993 "target \"%s\" already exist", target); 1994 return; 1995 } 1996 port = &ct->ct_port; 1997 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 1998 goto done; 1999 2000 port->frontend = &cfiscsi_frontend; 2001 port->port_type = CTL_PORT_ISCSI; 2002 /* XXX KDM what should the real number be here? */ 2003 port->num_requested_ctl_io = 4096; 2004 port->port_name = "iscsi"; 2005 port->virtual_port = strtoul(tag, NULL, 0); 2006 port->port_online = cfiscsi_online; 2007 port->port_offline = cfiscsi_offline; 2008 port->port_info = cfiscsi_info; 2009 port->onoff_arg = ct; 2010 port->lun_enable = cfiscsi_lun_enable; 2011 port->lun_disable = cfiscsi_lun_disable; 2012 port->lun_map = cfiscsi_lun_map; 2013 port->targ_lun_arg = ct; 2014 port->fe_datamove = cfiscsi_datamove; 2015 port->fe_done = cfiscsi_done; 2016 2017 /* XXX KDM what should we report here? */ 2018 /* XXX These should probably be fetched from CTL. */ 2019 port->max_targets = 1; 2020 port->max_target_id = 15; 2021 2022 port->options = opts; 2023 STAILQ_INIT(&opts); 2024 2025 /* Generate Port ID. */ 2026 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2027 idlen = roundup2(idlen, 4); 2028 len = sizeof(struct scsi_vpd_device_id) + idlen; 2029 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2030 M_CTL, M_WAITOK | M_ZERO); 2031 port->port_devid->len = len; 2032 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2033 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2034 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2035 SVPD_ID_TYPE_SCSI_NAME; 2036 desc->length = idlen; 2037 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2038 target, port->virtual_port); 2039 2040 /* Generate Target ID. */ 2041 idlen = strlen(target) + 1; 2042 idlen = roundup2(idlen, 4); 2043 len = sizeof(struct scsi_vpd_device_id) + idlen; 2044 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2045 M_CTL, M_WAITOK | M_ZERO); 2046 port->target_devid->len = len; 2047 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2048 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2049 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2050 SVPD_ID_TYPE_SCSI_NAME; 2051 desc->length = idlen; 2052 strlcpy(desc->identifier, target, idlen); 2053 2054 retval = ctl_port_register(port, /*master_SC*/ 1); 2055 if (retval != 0) { 2056 ctl_free_opts(&port->options); 2057 cfiscsi_target_release(ct); 2058 free(port->port_devid, M_CFISCSI); 2059 free(port->target_devid, M_CFISCSI); 2060 req->status = CTL_LUN_ERROR; 2061 snprintf(req->error_str, sizeof(req->error_str), 2062 "ctl_frontend_register() failed with error %d", retval); 2063 return; 2064 } 2065done: 2066 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2067 req->status = CTL_LUN_OK; 2068 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2069 sizeof(port->targ_port)); //XXX 2070} 2071 2072static void 2073cfiscsi_ioctl_port_remove(struct ctl_req *req) 2074{ 2075 struct cfiscsi_target *ct; 2076 const char *target; 2077 ctl_options_t opts; 2078 2079 ctl_init_opts(&opts, req->num_args, req->kern_args); 2080 target = ctl_get_opt(&opts, "cfiscsi_target"); 2081 if (target == NULL) { 2082 ctl_free_opts(&opts); 2083 req->status = CTL_LUN_ERROR; 2084 snprintf(req->error_str, sizeof(req->error_str), 2085 "Missing required argument"); 2086 return; 2087 } 2088 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2089 if (ct == NULL) { 2090 ctl_free_opts(&opts); 2091 req->status = CTL_LUN_ERROR; 2092 snprintf(req->error_str, sizeof(req->error_str), 2093 "can't find target \"%s\"", target); 2094 return; 2095 } 2096 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2097 ctl_free_opts(&opts); 2098 req->status = CTL_LUN_ERROR; 2099 snprintf(req->error_str, sizeof(req->error_str), 2100 "target \"%s\" is already dying", target); 2101 return; 2102 } 2103 ctl_free_opts(&opts); 2104 2105 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2106 ctl_port_offline(&ct->ct_port); 2107 cfiscsi_target_release(ct); 2108 cfiscsi_target_release(ct); 2109} 2110 2111static int 2112cfiscsi_ioctl(struct cdev *dev, 2113 u_long cmd, caddr_t addr, int flag, struct thread *td) 2114{ 2115 struct ctl_iscsi *ci; 2116 struct ctl_req *req; 2117 2118 if (cmd == CTL_PORT_REQ) { 2119 req = (struct ctl_req *)addr; 2120 switch (req->reqtype) { 2121 case CTL_REQ_CREATE: 2122 cfiscsi_ioctl_port_create(req); 2123 break; 2124 case CTL_REQ_REMOVE: 2125 cfiscsi_ioctl_port_remove(req); 2126 break; 2127 default: 2128 req->status = CTL_LUN_ERROR; 2129 snprintf(req->error_str, sizeof(req->error_str), 2130 "Unsupported request type %d", req->reqtype); 2131 } 2132 return (0); 2133 } 2134 2135 if (cmd != CTL_ISCSI) 2136 return (ENOTTY); 2137 2138 ci = (struct ctl_iscsi *)addr; 2139 switch (ci->type) { 2140 case CTL_ISCSI_HANDOFF: 2141 cfiscsi_ioctl_handoff(ci); 2142 break; 2143 case CTL_ISCSI_LIST: 2144 cfiscsi_ioctl_list(ci); 2145 break; 2146 case CTL_ISCSI_TERMINATE: 2147 cfiscsi_ioctl_terminate(ci); 2148 break; 2149 case CTL_ISCSI_LOGOUT: 2150 cfiscsi_ioctl_logout(ci); 2151 break; 2152#ifdef ICL_KERNEL_PROXY 2153 case CTL_ISCSI_LISTEN: 2154 cfiscsi_ioctl_listen(ci); 2155 break; 2156 case CTL_ISCSI_ACCEPT: 2157 cfiscsi_ioctl_accept(ci); 2158 break; 2159 case CTL_ISCSI_SEND: 2160 cfiscsi_ioctl_send(ci); 2161 break; 2162 case CTL_ISCSI_RECEIVE: 2163 cfiscsi_ioctl_receive(ci); 2164 break; 2165#else 2166 case CTL_ISCSI_LISTEN: 2167 case CTL_ISCSI_ACCEPT: 2168 case CTL_ISCSI_SEND: 2169 case CTL_ISCSI_RECEIVE: 2170 ci->status = CTL_ISCSI_ERROR; 2171 snprintf(ci->error_str, sizeof(ci->error_str), 2172 "%s: CTL compiled without ICL_KERNEL_PROXY", 2173 __func__); 2174 break; 2175#endif /* !ICL_KERNEL_PROXY */ 2176 default: 2177 ci->status = CTL_ISCSI_ERROR; 2178 snprintf(ci->error_str, sizeof(ci->error_str), 2179 "%s: invalid iSCSI request type %d", __func__, ci->type); 2180 break; 2181 } 2182 2183 return (0); 2184} 2185 2186static void 2187cfiscsi_target_hold(struct cfiscsi_target *ct) 2188{ 2189 2190 refcount_acquire(&ct->ct_refcount); 2191} 2192 2193static void 2194cfiscsi_target_release(struct cfiscsi_target *ct) 2195{ 2196 struct cfiscsi_softc *softc; 2197 2198 softc = ct->ct_softc; 2199 mtx_lock(&softc->lock); 2200 if (refcount_release(&ct->ct_refcount)) { 2201 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2202 mtx_unlock(&softc->lock); 2203 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2204 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2205 if (ctl_port_deregister(&ct->ct_port) != 0) 2206 printf("%s: ctl_port_deregister() failed\n", 2207 __func__); 2208 } 2209 free(ct, M_CFISCSI); 2210 2211 return; 2212 } 2213 mtx_unlock(&softc->lock); 2214} 2215 2216static struct cfiscsi_target * 2217cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2218{ 2219 struct cfiscsi_target *ct; 2220 2221 mtx_lock(&softc->lock); 2222 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2223 if (strcmp(name, ct->ct_name) != 0 || 2224 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2225 continue; 2226 cfiscsi_target_hold(ct); 2227 mtx_unlock(&softc->lock); 2228 return (ct); 2229 } 2230 mtx_unlock(&softc->lock); 2231 2232 return (NULL); 2233} 2234 2235static struct cfiscsi_target * 2236cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2237 const char *alias) 2238{ 2239 struct cfiscsi_target *ct, *newct; 2240 int i; 2241 2242 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2243 return (NULL); 2244 2245 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2246 2247 mtx_lock(&softc->lock); 2248 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2249 if (strcmp(name, ct->ct_name) != 0 || 2250 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2251 continue; 2252 cfiscsi_target_hold(ct); 2253 mtx_unlock(&softc->lock); 2254 free(newct, M_CFISCSI); 2255 return (ct); 2256 } 2257 2258 for (i = 0; i < CTL_MAX_LUNS; i++) 2259 newct->ct_luns[i] = UINT32_MAX; 2260 2261 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2262 if (alias != NULL) 2263 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2264 refcount_init(&newct->ct_refcount, 1); 2265 newct->ct_softc = softc; 2266 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2267 mtx_unlock(&softc->lock); 2268 2269 return (newct); 2270} 2271 2272/* 2273 * Takes LUN from the target space and returns LUN from the CTL space. 2274 */ 2275static uint32_t 2276cfiscsi_lun_map(void *arg, uint32_t lun) 2277{ 2278 struct cfiscsi_target *ct = arg; 2279 2280 if (lun >= CTL_MAX_LUNS) { 2281 CFISCSI_DEBUG("requested lun number %d is higher " 2282 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2283 return (UINT32_MAX); 2284 } 2285 return (ct->ct_luns[lun]); 2286} 2287 2288static int 2289cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2290 unsigned long lun_id, unsigned long ctl_lun_id) 2291{ 2292 2293 if (lun_id >= CTL_MAX_LUNS) { 2294 CFISCSI_WARN("requested lun number %ld is higher " 2295 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2296 return (-1); 2297 } 2298 2299 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2300 /* 2301 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2302 * when the LUN is created, and a second time just before 2303 * the port is brought online; don't emit warnings 2304 * for that case. 2305 */ 2306 if (ct->ct_luns[lun_id] == ctl_lun_id) 2307 return (0); 2308 CFISCSI_WARN("lun %ld already allocated", lun_id); 2309 return (-1); 2310 } 2311 2312#if 0 2313 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2314 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2315#endif 2316 2317 ct->ct_luns[lun_id] = ctl_lun_id; 2318 2319 return (0); 2320} 2321 2322static int 2323cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2324{ 2325 struct cfiscsi_softc *softc; 2326 struct cfiscsi_target *ct; 2327 const char *target = NULL; 2328 const char *lun = NULL; 2329 unsigned long tmp; 2330 2331 ct = (struct cfiscsi_target *)arg; 2332 softc = ct->ct_softc; 2333 2334 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2335 "cfiscsi_target"); 2336 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2337 "cfiscsi_lun"); 2338 2339 if (target == NULL && lun == NULL) 2340 return (0); 2341 2342 if (target == NULL || lun == NULL) { 2343 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2344 "cfiscsi_lun, or the other way around; ignoring"); 2345 return (0); 2346 } 2347 2348 if (strcmp(target, ct->ct_name) != 0) 2349 return (0); 2350 2351 tmp = strtoul(lun, NULL, 10); 2352 cfiscsi_target_set_lun(ct, tmp, lun_id); 2353 return (0); 2354} 2355 2356static int 2357cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2358{ 2359 struct cfiscsi_softc *softc; 2360 struct cfiscsi_target *ct; 2361 int i; 2362 2363 ct = (struct cfiscsi_target *)arg; 2364 softc = ct->ct_softc; 2365 2366 mtx_lock(&softc->lock); 2367 for (i = 0; i < CTL_MAX_LUNS; i++) { 2368 if (ct->ct_luns[i] != lun_id) 2369 continue; 2370 ct->ct_luns[i] = UINT32_MAX; 2371 break; 2372 } 2373 mtx_unlock(&softc->lock); 2374 return (0); 2375} 2376 2377static void 2378cfiscsi_datamove_in(union ctl_io *io) 2379{ 2380 struct cfiscsi_session *cs; 2381 struct icl_pdu *request, *response; 2382 const struct iscsi_bhs_scsi_command *bhssc; 2383 struct iscsi_bhs_data_in *bhsdi; 2384 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2385 size_t len, expected_len, sg_len, buffer_offset; 2386 const char *sg_addr; 2387 int ctl_sg_count, error, i; 2388 2389 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2390 cs = PDU_SESSION(request); 2391 2392 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2393 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2394 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2395 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2396 2397 if (io->scsiio.kern_sg_entries > 0) { 2398 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2399 ctl_sg_count = io->scsiio.kern_sg_entries; 2400 } else { 2401 ctl_sglist = &ctl_sg_entry; 2402 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2403 ctl_sglist->len = io->scsiio.kern_data_len; 2404 ctl_sg_count = 1; 2405 } 2406 2407 /* 2408 * This is the total amount of data to be transferred within the current 2409 * SCSI command. We need to record it so that we can properly report 2410 * underflow/underflow. 2411 */ 2412 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2413 2414 /* 2415 * This is the offset within the current SCSI command; for the first 2416 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2417 * it will be the sum of lengths of previous ones. 2418 */ 2419 buffer_offset = io->scsiio.kern_rel_offset; 2420 2421 /* 2422 * This is the transfer length expected by the initiator. In theory, 2423 * it could be different from the correct amount of data from the SCSI 2424 * point of view, even if that doesn't make any sense. 2425 */ 2426 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2427#if 0 2428 if (expected_len != io->scsiio.kern_total_len) { 2429 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2430 "actual length %zd", expected_len, 2431 (size_t)io->scsiio.kern_total_len); 2432 } 2433#endif 2434 2435 if (buffer_offset >= expected_len) { 2436#if 0 2437 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2438 "already sent the expected len", buffer_offset); 2439#endif 2440 io->scsiio.be_move_done(io); 2441 return; 2442 } 2443 2444 i = 0; 2445 sg_addr = NULL; 2446 sg_len = 0; 2447 response = NULL; 2448 bhsdi = NULL; 2449 for (;;) { 2450 if (response == NULL) { 2451 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2452 if (response == NULL) { 2453 CFISCSI_SESSION_WARN(cs, "failed to " 2454 "allocate memory; dropping connection"); 2455 ctl_set_busy(&io->scsiio); 2456 io->scsiio.be_move_done(io); 2457 cfiscsi_session_terminate(cs); 2458 return; 2459 } 2460 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2461 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2462 bhsdi->bhsdi_initiator_task_tag = 2463 bhssc->bhssc_initiator_task_tag; 2464 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2465 PDU_EXPDATASN(request)++; 2466 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2467 } 2468 2469 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2470 if (sg_len == 0) { 2471 sg_addr = ctl_sglist[i].addr; 2472 sg_len = ctl_sglist[i].len; 2473 KASSERT(sg_len > 0, ("sg_len <= 0")); 2474 } 2475 2476 len = sg_len; 2477 2478 /* 2479 * Truncate to maximum data segment length. 2480 */ 2481 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2482 ("ip_data_len %zd >= max_data_segment_length %zd", 2483 response->ip_data_len, cs->cs_max_data_segment_length)); 2484 if (response->ip_data_len + len > 2485 cs->cs_max_data_segment_length) { 2486 len = cs->cs_max_data_segment_length - 2487 response->ip_data_len; 2488 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2489 len, sg_len)); 2490 } 2491 2492 /* 2493 * Truncate to expected data transfer length. 2494 */ 2495 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2496 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2497 buffer_offset, response->ip_data_len, expected_len)); 2498 if (buffer_offset + response->ip_data_len + len > expected_len) { 2499 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2500 "to expected data transfer length %zd", 2501 buffer_offset + response->ip_data_len + len, expected_len); 2502 len = expected_len - (buffer_offset + response->ip_data_len); 2503 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2504 len, sg_len)); 2505 } 2506 2507 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2508 if (error != 0) { 2509 CFISCSI_SESSION_WARN(cs, "failed to " 2510 "allocate memory; dropping connection"); 2511 icl_pdu_free(response); 2512 ctl_set_busy(&io->scsiio); 2513 io->scsiio.be_move_done(io); 2514 cfiscsi_session_terminate(cs); 2515 return; 2516 } 2517 sg_addr += len; 2518 sg_len -= len; 2519 2520 KASSERT(buffer_offset + request->ip_data_len <= expected_len, 2521 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2522 buffer_offset, request->ip_data_len, expected_len)); 2523 if (buffer_offset + request->ip_data_len == expected_len) { 2524 /* 2525 * Already have the amount of data the initiator wanted. 2526 */ 2527 break; 2528 } 2529 2530 if (sg_len == 0) { 2531 /* 2532 * End of scatter-gather segment; 2533 * proceed to the next one... 2534 */ 2535 if (i == ctl_sg_count - 1) { 2536 /* 2537 * ... unless this was the last one. 2538 */ 2539 break; 2540 } 2541 i++; 2542 } 2543 2544 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2545 /* 2546 * Can't stuff more data into the current PDU; 2547 * queue it. Note that's not enough to check 2548 * for kern_data_resid == 0 instead; there 2549 * may be several Data-In PDUs for the final 2550 * call to cfiscsi_datamove(), and we want 2551 * to set the F flag only on the last of them. 2552 */ 2553 buffer_offset += response->ip_data_len; 2554 if (buffer_offset == io->scsiio.kern_total_len || 2555 buffer_offset == expected_len) 2556 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2557 cfiscsi_pdu_queue(response); 2558 response = NULL; 2559 bhsdi = NULL; 2560 } 2561 } 2562 if (response != NULL) { 2563 buffer_offset += response->ip_data_len; 2564 if (buffer_offset == io->scsiio.kern_total_len || 2565 buffer_offset == expected_len) 2566 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2567 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2568 cfiscsi_pdu_queue(response); 2569 } 2570 2571 io->scsiio.be_move_done(io); 2572} 2573 2574static void 2575cfiscsi_datamove_out(union ctl_io *io) 2576{ 2577 struct cfiscsi_session *cs; 2578 struct icl_pdu *request, *response; 2579 const struct iscsi_bhs_scsi_command *bhssc; 2580 struct iscsi_bhs_r2t *bhsr2t; 2581 struct cfiscsi_data_wait *cdw; 2582 uint32_t target_transfer_tag; 2583 bool done; 2584 2585 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2586 cs = PDU_SESSION(request); 2587 2588 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2589 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2590 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2591 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2592 2593 /* 2594 * We need to record it so that we can properly report 2595 * underflow/underflow. 2596 */ 2597 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2598 2599 /* 2600 * We hadn't received anything during this datamove yet. 2601 */ 2602 io->scsiio.ext_data_filled = 0; 2603 2604 target_transfer_tag = 2605 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2606 2607#if 0 2608 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2609 "task tag 0x%x, target transfer tag 0x%x", 2610 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2611#endif 2612 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2613 if (cdw == NULL) { 2614 CFISCSI_SESSION_WARN(cs, "failed to " 2615 "allocate memory; dropping connection"); 2616 ctl_set_busy(&io->scsiio); 2617 io->scsiio.be_move_done(io); 2618 cfiscsi_session_terminate(cs); 2619 return; 2620 } 2621 cdw->cdw_ctl_io = io; 2622 cdw->cdw_target_transfer_tag = target_transfer_tag; 2623 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2624 2625 if (cs->cs_immediate_data && io->scsiio.kern_rel_offset < 2626 icl_pdu_data_segment_length(request)) { 2627 done = cfiscsi_handle_data_segment(request, cdw); 2628 if (done) { 2629 uma_zfree(cfiscsi_data_wait_zone, cdw); 2630 io->scsiio.be_move_done(io); 2631 return; 2632 } 2633 } 2634 2635 CFISCSI_SESSION_LOCK(cs); 2636 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2637 CFISCSI_SESSION_UNLOCK(cs); 2638 2639 /* 2640 * XXX: We should limit the number of outstanding R2T PDUs 2641 * per task to MaxOutstandingR2T. 2642 */ 2643 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2644 if (response == NULL) { 2645 CFISCSI_SESSION_WARN(cs, "failed to " 2646 "allocate memory; dropping connection"); 2647 ctl_set_busy(&io->scsiio); 2648 io->scsiio.be_move_done(io); 2649 cfiscsi_session_terminate(cs); 2650 return; 2651 } 2652 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2653 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2654 bhsr2t->bhsr2t_flags = 0x80; 2655 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2656 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2657 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2658 /* 2659 * XXX: Here we assume that cfiscsi_datamove() won't ever 2660 * be running concurrently on several CPUs for a given 2661 * command. 2662 */ 2663 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2664 PDU_R2TSN(request)++; 2665 /* 2666 * This is the offset within the current SCSI command; 2667 * i.e. for the first call of datamove(), it will be 0, 2668 * and for subsequent ones it will be the sum of lengths 2669 * of previous ones. 2670 * 2671 * The ext_data_filled is to account for unsolicited 2672 * (immediate) data that might have already arrived. 2673 */ 2674 bhsr2t->bhsr2t_buffer_offset = 2675 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2676 /* 2677 * This is the total length (sum of S/G lengths) this call 2678 * to cfiscsi_datamove() is supposed to handle. 2679 * 2680 * XXX: Limit it to MaxBurstLength. 2681 */ 2682 bhsr2t->bhsr2t_desired_data_transfer_length = 2683 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2684 cfiscsi_pdu_queue(response); 2685} 2686 2687static void 2688cfiscsi_datamove(union ctl_io *io) 2689{ 2690 2691 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2692 cfiscsi_datamove_in(io); 2693 else 2694 cfiscsi_datamove_out(io); 2695} 2696 2697static void 2698cfiscsi_scsi_command_done(union ctl_io *io) 2699{ 2700 struct icl_pdu *request, *response; 2701 struct iscsi_bhs_scsi_command *bhssc; 2702 struct iscsi_bhs_scsi_response *bhssr; 2703#ifdef DIAGNOSTIC 2704 struct cfiscsi_data_wait *cdw; 2705#endif 2706 struct cfiscsi_session *cs; 2707 uint16_t sense_length; 2708 2709 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2710 cs = PDU_SESSION(request); 2711 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2712 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2713 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2714 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2715 2716 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2717 // bhssc->bhssc_initiator_task_tag); 2718 2719#ifdef DIAGNOSTIC 2720 CFISCSI_SESSION_LOCK(cs); 2721 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2722 KASSERT(bhssc->bhssc_initiator_task_tag != 2723 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2724 CFISCSI_SESSION_UNLOCK(cs); 2725#endif 2726 2727 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2728 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2729 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2730 bhssr->bhssr_flags = 0x80; 2731 /* 2732 * XXX: We don't deal with bidirectional under/overflows; 2733 * does anything actually support those? 2734 */ 2735 if (PDU_TOTAL_TRANSFER_LEN(request) < 2736 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2737 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2738 bhssr->bhssr_residual_count = 2739 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2740 PDU_TOTAL_TRANSFER_LEN(request)); 2741 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2742 // ntohl(bhssr->bhssr_residual_count)); 2743 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2744 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2745 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2746 bhssr->bhssr_residual_count = 2747 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2748 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2749 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2750 // ntohl(bhssr->bhssr_residual_count)); 2751 } 2752 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2753 bhssr->bhssr_status = io->scsiio.scsi_status; 2754 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2755 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2756 2757 if (io->scsiio.sense_len > 0) { 2758#if 0 2759 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2760 io->scsiio.sense_len); 2761#endif 2762 sense_length = htons(io->scsiio.sense_len); 2763 icl_pdu_append_data(response, 2764 &sense_length, sizeof(sense_length), M_WAITOK); 2765 icl_pdu_append_data(response, 2766 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2767 } 2768 2769 ctl_free_io(io); 2770 icl_pdu_free(request); 2771 cfiscsi_pdu_queue(response); 2772} 2773 2774static void 2775cfiscsi_task_management_done(union ctl_io *io) 2776{ 2777 struct icl_pdu *request, *response; 2778 struct iscsi_bhs_task_management_request *bhstmr; 2779 struct iscsi_bhs_task_management_response *bhstmr2; 2780 struct cfiscsi_data_wait *cdw, *tmpcdw; 2781 struct cfiscsi_session *cs; 2782 2783 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2784 cs = PDU_SESSION(request); 2785 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2786 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2787 ISCSI_BHS_OPCODE_TASK_REQUEST, 2788 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2789 2790#if 0 2791 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2792 bhstmr->bhstmr_initiator_task_tag, 2793 bhstmr->bhstmr_referenced_task_tag); 2794#endif 2795 2796 if ((bhstmr->bhstmr_function & ~0x80) == 2797 BHSTMR_FUNCTION_ABORT_TASK) { 2798 /* 2799 * Make sure we no longer wait for Data-Out for this command. 2800 */ 2801 CFISCSI_SESSION_LOCK(cs); 2802 TAILQ_FOREACH_SAFE(cdw, 2803 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2804 if (bhstmr->bhstmr_referenced_task_tag != 2805 cdw->cdw_initiator_task_tag) 2806 continue; 2807 2808#if 0 2809 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2810 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2811#endif 2812 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2813 cdw, cdw_next); 2814 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2815 uma_zfree(cfiscsi_data_wait_zone, cdw); 2816 } 2817 CFISCSI_SESSION_UNLOCK(cs); 2818 } 2819 2820 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2821 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2822 response->ip_bhs; 2823 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2824 bhstmr2->bhstmr_flags = 0x80; 2825 if (io->io_hdr.status == CTL_SUCCESS) { 2826 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2827 } else { 2828 /* 2829 * XXX: How to figure out what exactly went wrong? iSCSI spec 2830 * expects us to provide detailed error, e.g. "Task does 2831 * not exist" or "LUN does not exist". 2832 */ 2833 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2834 bhstmr2->bhstmr_response = 2835 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2836 } 2837 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2838 2839 ctl_free_io(io); 2840 icl_pdu_free(request); 2841 cfiscsi_pdu_queue(response); 2842} 2843 2844static void 2845cfiscsi_done(union ctl_io *io) 2846{ 2847 struct icl_pdu *request; 2848 struct cfiscsi_session *cs; 2849 2850 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2851 ("invalid CTL status %#x", io->io_hdr.status)); 2852 2853 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2854 if (request == NULL) { 2855 /* 2856 * Implicit task termination has just completed; nothing to do. 2857 */ 2858 return; 2859 } 2860 2861 cs = PDU_SESSION(request); 2862 refcount_release(&cs->cs_outstanding_ctl_pdus); 2863 2864 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2865 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2866 cfiscsi_scsi_command_done(io); 2867 break; 2868 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2869 cfiscsi_task_management_done(io); 2870 break; 2871 default: 2872 panic("cfiscsi_done called with wrong opcode 0x%x", 2873 request->ip_bhs->bhs_opcode); 2874 } 2875} 2876