ctl_frontend_iscsi.c revision 256195
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 256195 2013-10-09 16:55:52Z trasz $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 256195 2013-10-09 16:55:52Z trasz $"); 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 78static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 79static uma_zone_t cfiscsi_data_wait_zone; 80 81SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 82 "CAM Target Layer iSCSI Frontend"); 83static int debug = 3; 84TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 85SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RW, 86 &debug, 1, "Enable debug messages"); 87static int ping_timeout = 5; 88TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RW, 90 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 91static int login_timeout = 60; 92TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RW, 94 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 95static int maxcmdsn_delta = 256; 96TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RW, 98 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 99 "without confirmation"); 100 101#define CFISCSI_DEBUG(X, ...) \ 102 if (debug > 1) { \ 103 printf("%s: " X "\n", __func__, ## __VA_ARGS__);\ 104 } while (0) 105 106#define CFISCSI_WARN(X, ...) \ 107 if (debug > 0) { \ 108 printf("WARNING: %s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } while (0) 111 112#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 113 if (debug > 1) { \ 114 printf("%s: %s (%s): " X "\n", \ 115 __func__, S->cs_initiator_addr, \ 116 S->cs_initiator_name, ## __VA_ARGS__); \ 117 } while (0) 118 119#define CFISCSI_SESSION_WARN(S, X, ...) \ 120 if (debug > 0) { \ 121 printf("WARNING: %s (%s): " X "\n", \ 122 S->cs_initiator_addr, \ 123 S->cs_initiator_name, ## __VA_ARGS__); \ 124 } while (0) 125 126#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 127#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 128#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 129 130#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 131#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 132#define PDU_EXPDATASN(X) (X)->ip_prv0 133#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 134#define PDU_R2TSN(X) (X)->ip_prv2 135 136int cfiscsi_init(void); 137static void cfiscsi_online(void *arg); 138static void cfiscsi_offline(void *arg); 139static int cfiscsi_targ_enable(void *arg, struct ctl_id targ_id); 140static int cfiscsi_targ_disable(void *arg, struct ctl_id targ_id); 141static int cfiscsi_lun_enable(void *arg, 142 struct ctl_id target_id, int lun_id); 143static int cfiscsi_lun_disable(void *arg, 144 struct ctl_id target_id, int lun_id); 145static int cfiscsi_ioctl(struct cdev *dev, 146 u_long cmd, caddr_t addr, int flag, struct thread *td); 147static int cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len); 148static void cfiscsi_datamove(union ctl_io *io); 149static void cfiscsi_done(union ctl_io *io); 150static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun); 151static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 152static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 153static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 154static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 155static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 156static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 157static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 158static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 159 *softc, const char *name); 160static void cfiscsi_target_release(struct cfiscsi_target *ct); 161static void cfiscsi_session_delete(struct cfiscsi_session *cs); 162 163static struct cfiscsi_softc cfiscsi_softc; 164extern struct ctl_softc *control_softc; 165 166static int cfiscsi_module_event_handler(module_t, int /*modeventtype_t*/, void *); 167 168static moduledata_t cfiscsi_moduledata = { 169 "ctlcfiscsi", 170 cfiscsi_module_event_handler, 171 NULL 172}; 173 174DECLARE_MODULE(ctlcfiscsi, cfiscsi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH); 175MODULE_VERSION(ctlcfiscsi, 1); 176MODULE_DEPEND(ctlcfiscsi, ctl, 1, 1, 1); 177MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 178 179static struct icl_pdu * 180cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 181{ 182 183 return (icl_pdu_new_bhs(request->ip_conn, flags)); 184} 185 186static bool 187cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 188{ 189 const struct iscsi_bhs_scsi_command *bhssc; 190 struct cfiscsi_session *cs; 191 uint32_t cmdsn, expstatsn; 192 193 cs = PDU_SESSION(request); 194 195 /* 196 * Every incoming PDU - not just NOP-Out - resets the ping timer. 197 * The purpose of the timeout is to reset the connection when it stalls; 198 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 199 * in some queue. 200 * 201 * XXX: Locking? 202 */ 203 cs->cs_timeout = 0; 204 205 /* 206 * Data-Out PDUs don't contain CmdSN. 207 */ 208 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 209 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 210 return (false); 211 212 /* 213 * We're only using fields common for all the request 214 * (initiator -> target) PDUs. 215 */ 216 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 217 cmdsn = ntohl(bhssc->bhssc_cmdsn); 218 expstatsn = ntohl(bhssc->bhssc_expstatsn); 219 220 CFISCSI_SESSION_LOCK(cs); 221#if 0 222 if (expstatsn != cs->cs_statsn) { 223 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 224 "while current StatSN is %d", expstatsn, 225 cs->cs_statsn); 226 } 227#endif 228 229 /* 230 * The target MUST silently ignore any non-immediate command outside 231 * of this range. 232 * 233 * XXX: ... or non-immediate duplicates within the range. 234 */ 235 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 236 CFISCSI_SESSION_UNLOCK(cs); 237 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 238 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 239 return (true); 240 } 241 242 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 243 cs->cs_cmdsn++; 244 245 CFISCSI_SESSION_UNLOCK(cs); 246 247 return (false); 248} 249 250static void 251cfiscsi_pdu_handle(struct icl_pdu *request) 252{ 253 struct cfiscsi_session *cs; 254 bool ignore; 255 256 cs = PDU_SESSION(request); 257 258 ignore = cfiscsi_pdu_update_cmdsn(request); 259 if (ignore) { 260 icl_pdu_free(request); 261 return; 262 } 263 264 /* 265 * Handle the PDU; this includes e.g. receiving the remaining 266 * part of PDU and submitting the SCSI command to CTL 267 * or queueing a reply. The handling routine is responsible 268 * for freeing the PDU when it's no longer needed. 269 */ 270 switch (request->ip_bhs->bhs_opcode & 271 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 272 case ISCSI_BHS_OPCODE_NOP_OUT: 273 cfiscsi_pdu_handle_nop_out(request); 274 break; 275 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 276 cfiscsi_pdu_handle_scsi_command(request); 277 break; 278 case ISCSI_BHS_OPCODE_TASK_REQUEST: 279 cfiscsi_pdu_handle_task_request(request); 280 break; 281 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 282 cfiscsi_pdu_handle_data_out(request); 283 break; 284 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 285 cfiscsi_pdu_handle_logout_request(request); 286 break; 287 default: 288 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 289 "opcode 0x%x; dropping connection", 290 request->ip_bhs->bhs_opcode); 291 cfiscsi_session_terminate(cs); 292 icl_pdu_free(request); 293 } 294 295} 296 297static void 298cfiscsi_receive_callback(struct icl_pdu *request) 299{ 300 struct cfiscsi_session *cs; 301 302 cs = PDU_SESSION(request); 303 304#ifdef ICL_KERNEL_PROXY 305 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 306 if (cs->cs_login_pdu == NULL) 307 cs->cs_login_pdu = request; 308 else 309 icl_pdu_free(request); 310 cv_signal(&cs->cs_login_cv); 311 return; 312 } 313#endif 314 315 cfiscsi_pdu_handle(request); 316} 317 318static void 319cfiscsi_error_callback(struct icl_conn *ic) 320{ 321 struct cfiscsi_session *cs; 322 323 cs = CONN_SESSION(ic); 324 325 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 326 cfiscsi_session_terminate(cs); 327} 328 329static int 330cfiscsi_pdu_prepare(struct icl_pdu *response) 331{ 332 struct cfiscsi_session *cs; 333 struct iscsi_bhs_scsi_response *bhssr; 334 bool advance_statsn = true; 335 336 cs = PDU_SESSION(response); 337 338 CFISCSI_SESSION_LOCK_ASSERT(cs); 339 340 /* 341 * We're only using fields common for all the response 342 * (target -> initiator) PDUs. 343 */ 344 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 345 346 /* 347 * 10.8.3: "The StatSN for this connection is not advanced 348 * after this PDU is sent." 349 */ 350 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 351 advance_statsn = false; 352 353 /* 354 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 355 * StatSN for the connection is not advanced after this PDU is sent." 356 */ 357 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 358 bhssr->bhssr_initiator_task_tag == 0xffffffff) 359 advance_statsn = false; 360 361 /* 362 * See the comment below - StatSN is not meaningful and must 363 * not be advanced. 364 */ 365 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 366 advance_statsn = false; 367 368 /* 369 * 10.7.3: "The fields StatSN, Status, and Residual Count 370 * only have meaningful content if the S bit is set to 1." 371 */ 372 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 373 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 374 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 375 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 376 377 if (advance_statsn) 378 cs->cs_statsn++; 379 380 return (0); 381} 382 383static void 384cfiscsi_pdu_queue(struct icl_pdu *response) 385{ 386 struct cfiscsi_session *cs; 387 388 cs = PDU_SESSION(response); 389 390 CFISCSI_SESSION_LOCK(cs); 391 cfiscsi_pdu_prepare(response); 392 icl_pdu_queue(response); 393 CFISCSI_SESSION_UNLOCK(cs); 394} 395 396static uint32_t 397cfiscsi_decode_lun(uint64_t encoded) 398{ 399 uint8_t lun[8]; 400 uint32_t result; 401 402 /* 403 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 404 * but is in fact an evil, multidimensional structure defined 405 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 406 */ 407 memcpy(lun, &encoded, sizeof(lun)); 408 switch (lun[0] & 0xC0) { 409 case 0x00: 410 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 411 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 412 CFISCSI_WARN("malformed LUN " 413 "(peripheral device addressing method): 0x%jx", 414 (uintmax_t)encoded); 415 result = 0xffffffff; 416 break; 417 } 418 result = lun[1]; 419 break; 420 case 0x40: 421 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 422 lun[6] != 0 || lun[7] != 0) { 423 CFISCSI_WARN("malformed LUN " 424 "(flat address space addressing method): 0x%jx", 425 (uintmax_t)encoded); 426 result = 0xffffffff; 427 break; 428 } 429 result = ((lun[0] & 0x3f) << 8) + lun[1]; 430 break; 431 case 0xC0: 432 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 433 lun[6] != 0 || lun[7] != 0) { 434 CFISCSI_WARN("malformed LUN (extended flat " 435 "address space addressing method): 0x%jx", 436 (uintmax_t)encoded); 437 result = 0xffffffff; 438 break; 439 } 440 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 441 default: 442 CFISCSI_WARN("unsupported LUN format 0x%jx", 443 (uintmax_t)encoded); 444 result = 0xffffffff; 445 break; 446 } 447 448 return (result); 449} 450 451static void 452cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 453{ 454 struct cfiscsi_session *cs; 455 struct iscsi_bhs_nop_out *bhsno; 456 struct iscsi_bhs_nop_in *bhsni; 457 struct icl_pdu *response; 458 void *data = NULL; 459 size_t datasize; 460 int error; 461 462 cs = PDU_SESSION(request); 463 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 464 465 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 466 /* 467 * Nothing to do, iscsi_pdu_update_statsn() already 468 * zeroed the timeout. 469 */ 470 icl_pdu_free(request); 471 return; 472 } 473 474 datasize = icl_pdu_data_segment_length(request); 475 if (datasize > 0) { 476 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 477 if (data == NULL) { 478 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 479 "dropping connection"); 480 icl_pdu_free(request); 481 cfiscsi_session_terminate(cs); 482 return; 483 } 484 icl_pdu_get_data(request, 0, data, datasize); 485 } 486 487 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 488 if (response == NULL) { 489 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 490 "droppping connection"); 491 free(data, M_CFISCSI); 492 icl_pdu_free(request); 493 cfiscsi_session_terminate(cs); 494 return; 495 } 496 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 497 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 498 bhsni->bhsni_flags = 0x80; 499 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 500 bhsni->bhsni_target_transfer_tag = 0xffffffff; 501 if (datasize > 0) { 502 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 503 if (error != 0) { 504 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 505 "dropping connection"); 506 free(data, M_CFISCSI); 507 icl_pdu_free(request); 508 icl_pdu_free(response); 509 cfiscsi_session_terminate(cs); 510 return; 511 } 512 free(data, M_CFISCSI); 513 } 514 515 icl_pdu_free(request); 516 cfiscsi_pdu_queue(response); 517} 518 519static void 520cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 521{ 522 struct iscsi_bhs_scsi_command *bhssc; 523 struct cfiscsi_session *cs; 524 union ctl_io *io; 525 int error; 526 527 cs = PDU_SESSION(request); 528 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 529 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 530 // bhssc->bhssc_initiator_task_tag); 531 532 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 533 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 534 "ImmediateData=No; dropping connection"); 535 cfiscsi_session_terminate(cs); 536 icl_pdu_free(request); 537 return; 538 } 539 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 540 if (io == NULL) { 541 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 542 icl_pdu_free(request); 543 return; 544 } 545 ctl_zero_io(io); 546 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 547 io->io_hdr.io_type = CTL_IO_SCSI; 548 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 549 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 550 io->io_hdr.nexus.targ_target.id = 0; 551 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 552 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 553 io->io_hdr.nexus.lun_map_arg = cs; 554 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 555 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 556 case BHSSC_FLAGS_ATTR_UNTAGGED: 557 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 558 break; 559 case BHSSC_FLAGS_ATTR_SIMPLE: 560 io->scsiio.tag_type = CTL_TAG_SIMPLE; 561 break; 562 case BHSSC_FLAGS_ATTR_ORDERED: 563 io->scsiio.tag_type = CTL_TAG_ORDERED; 564 break; 565 case BHSSC_FLAGS_ATTR_HOQ: 566 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 567 break; 568 case BHSSC_FLAGS_ATTR_ACA: 569 io->scsiio.tag_type = CTL_TAG_ACA; 570 break; 571 default: 572 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 573 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 574 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 575 break; 576 } 577 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 578 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 579 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 580 error = ctl_queue(io); 581 if (error != CTL_RETVAL_COMPLETE) { 582 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 583 ctl_free_io(io); 584 refcount_release(&cs->cs_outstanding_ctl_pdus); 585 icl_pdu_free(request); 586 } 587} 588 589static void 590cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 591{ 592 struct iscsi_bhs_task_management_request *bhstmr; 593 struct iscsi_bhs_task_management_response *bhstmr2; 594 struct icl_pdu *response; 595 struct cfiscsi_session *cs; 596 union ctl_io *io; 597 int error; 598 599 cs = PDU_SESSION(request); 600 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 601 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 602 if (io == NULL) { 603 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 604 icl_pdu_free(request); 605 return; 606 } 607 ctl_zero_io(io); 608 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 609 io->io_hdr.io_type = CTL_IO_TASK; 610 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 611 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 612 io->io_hdr.nexus.targ_target.id = 0; 613 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 614 io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun; 615 io->io_hdr.nexus.lun_map_arg = cs; 616 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 617 618 switch (bhstmr->bhstmr_function & ~0x80) { 619 case BHSTMR_FUNCTION_ABORT_TASK: 620#if 0 621 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 622#endif 623 io->taskio.task_action = CTL_TASK_ABORT_TASK; 624 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 625 break; 626 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 627#if 0 628 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 629#endif 630 io->taskio.task_action = CTL_TASK_LUN_RESET; 631 break; 632 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 633#if 0 634 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 635#endif 636 io->taskio.task_action = CTL_TASK_BUS_RESET; 637 break; 638 default: 639 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 640 bhstmr->bhstmr_function & ~0x80); 641 ctl_free_io(io); 642 643 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 644 if (response == NULL) { 645 icl_pdu_free(request); 646 return; 647 } 648 bhstmr2 = (struct iscsi_bhs_task_management_response *) 649 response->ip_bhs; 650 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 651 bhstmr2->bhstmr_flags = 0x80; 652 bhstmr2->bhstmr_response = 653 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 654 bhstmr2->bhstmr_initiator_task_tag = 655 bhstmr->bhstmr_initiator_task_tag; 656 icl_pdu_free(request); 657 cfiscsi_pdu_queue(response); 658 return; 659 } 660 661 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 662 error = ctl_queue(io); 663 if (error != CTL_RETVAL_COMPLETE) { 664 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 665 ctl_free_io(io); 666 refcount_release(&cs->cs_outstanding_ctl_pdus); 667 icl_pdu_free(request); 668 } 669} 670 671static bool 672cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 673{ 674 struct iscsi_bhs_data_out *bhsdo; 675 struct cfiscsi_session *cs; 676 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 677 size_t copy_len, len, off, buffer_offset; 678 int ctl_sg_count; 679 union ctl_io *io; 680 681 cs = PDU_SESSION(request); 682 683 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 684 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 685 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 686 ISCSI_BHS_OPCODE_SCSI_COMMAND, 687 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 688 689 /* 690 * We're only using fields common for Data Out and SCSI Command PDUs. 691 */ 692 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 693 694 io = cdw->cdw_ctl_io; 695 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 696 ("CTL_FLAG_DATA_IN")); 697 698#if 0 699 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 700 request->ip_data_len, io->scsiio.kern_total_len); 701#endif 702 703 if (io->scsiio.kern_sg_entries > 0) { 704 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 705 ctl_sg_count = io->scsiio.kern_sg_entries; 706 } else { 707 ctl_sglist = &ctl_sg_entry; 708 ctl_sglist->addr = io->scsiio.kern_data_ptr; 709 ctl_sglist->len = io->scsiio.kern_data_len; 710 ctl_sg_count = 1; 711 } 712#if 0 713 if (ctl_sg_count > 1) 714 CFISCSI_SESSION_DEBUG(cs, "ctl_sg_count = %d", ctl_sg_count); 715#endif 716 717 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 718 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 719 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 720 else 721 buffer_offset = 0; 722 723 /* 724 * Make sure the offset, as sent by the initiator, matches the offset 725 * we're supposed to be at in the scatter-gather list. 726 */ 727 if (buffer_offset != io->scsiio.ext_data_filled) { 728 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 729 "expected %zd", buffer_offset, 730 (size_t)io->scsiio.ext_data_filled); 731 cfiscsi_session_terminate(cs); 732 return (true); 733 } 734 735 /* 736 * This is the offset within the PDU data segment, as opposed 737 * to buffer_offset, which is the offset within the task (SCSI 738 * command). 739 */ 740 off = 0; 741 len = icl_pdu_data_segment_length(request); 742 743 /* 744 * Iterate over the scatter/gather segments, filling them with data 745 * from the PDU data segment. Note that this can get called multiple 746 * times for one SCSI command; the cdw structure holds state for the 747 * scatter/gather list. 748 */ 749 for (;;) { 750 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 751 ("cdw->cdw_sg_index >= ctl_sg_count")); 752 if (cdw->cdw_sg_len == 0) { 753 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 754 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 755 } 756 KASSERT(off <= len, ("len > off")); 757 copy_len = len - off; 758 if (copy_len > cdw->cdw_sg_len) 759 copy_len = cdw->cdw_sg_len; 760 761 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 762 cdw->cdw_sg_addr += copy_len; 763 cdw->cdw_sg_len -= copy_len; 764 off += copy_len; 765 io->scsiio.ext_data_filled += copy_len; 766 767 if (cdw->cdw_sg_len == 0) { 768 /* 769 * End of current segment. 770 */ 771 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 772 /* 773 * Last segment in scatter/gather list. 774 */ 775 break; 776 } 777 cdw->cdw_sg_index++; 778 } 779 780 if (off == len) { 781 /* 782 * End of PDU payload. 783 */ 784 break; 785 } 786 } 787 788 if (len > off) { 789 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 790 "expected %zd", icl_pdu_data_segment_length(request), off); 791 cfiscsi_session_terminate(cs); 792 return (true); 793 } 794 795 if (bhsdo->bhsdo_flags & BHSDO_FLAGS_F || 796 io->scsiio.ext_data_filled == io->scsiio.kern_total_len) { 797 if ((bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 798 CFISCSI_SESSION_WARN(cs, "got the final packet without " 799 "the F flag; flags = 0x%x; dropping connection", 800 bhsdo->bhsdo_flags); 801 cfiscsi_session_terminate(cs); 802 return (true); 803 } 804 805 if (io->scsiio.ext_data_filled != io->scsiio.kern_total_len) { 806 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 807 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 808 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 809 "transmitted size was %zd bytes instead of %d; " 810 "dropping connection", 811 (size_t)io->scsiio.ext_data_filled, 812 io->scsiio.kern_total_len); 813 cfiscsi_session_terminate(cs); 814 return (true); 815 } else { 816 /* 817 * For SCSI Command PDU, this just means we need to 818 * solicit more data by sending R2T. 819 */ 820 return (false); 821 } 822 } 823#if 0 824 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 825 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 826#endif 827 828 return (true); 829 } 830 831 return (false); 832} 833 834static void 835cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 836{ 837 struct iscsi_bhs_data_out *bhsdo; 838 struct cfiscsi_session *cs; 839 struct cfiscsi_data_wait *cdw = NULL; 840 union ctl_io *io; 841 bool done; 842 843 cs = PDU_SESSION(request); 844 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 845 846 CFISCSI_SESSION_LOCK(cs); 847 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 848#if 0 849 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 850 "ttt 0x%x, itt 0x%x", 851 bhsdo->bhsdo_target_transfer_tag, 852 bhsdo->bhsdo_initiator_task_tag, 853 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 854#endif 855 if (bhsdo->bhsdo_target_transfer_tag == 856 cdw->cdw_target_transfer_tag) 857 break; 858 } 859 CFISCSI_SESSION_UNLOCK(cs); 860 if (cdw == NULL) { 861 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 862 "0x%x, not found", bhsdo->bhsdo_target_transfer_tag, 863 bhsdo->bhsdo_initiator_task_tag); 864 icl_pdu_free(request); 865 cfiscsi_session_terminate(cs); 866 return; 867 } 868 869 io = cdw->cdw_ctl_io; 870 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 871 ("CTL_FLAG_DATA_IN")); 872 873 done = cfiscsi_handle_data_segment(request, cdw); 874 if (done) { 875 CFISCSI_SESSION_LOCK(cs); 876 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 877 CFISCSI_SESSION_UNLOCK(cs); 878 uma_zfree(cfiscsi_data_wait_zone, cdw); 879 io->scsiio.be_move_done(io); 880 } 881 882 icl_pdu_free(request); 883} 884 885static void 886cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 887{ 888 struct iscsi_bhs_logout_request *bhslr; 889 struct iscsi_bhs_logout_response *bhslr2; 890 struct icl_pdu *response; 891 struct cfiscsi_session *cs; 892 893 cs = PDU_SESSION(request); 894 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 895 switch (bhslr->bhslr_reason & 0x7f) { 896 case BHSLR_REASON_CLOSE_SESSION: 897 case BHSLR_REASON_CLOSE_CONNECTION: 898 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 899 if (response == NULL) { 900 icl_pdu_free(request); 901 cfiscsi_session_terminate(cs); 902 return; 903 } 904 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 905 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 906 bhslr2->bhslr_flags = 0x80; 907 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 908 bhslr2->bhslr_initiator_task_tag = 909 bhslr->bhslr_initiator_task_tag; 910 icl_pdu_free(request); 911 cfiscsi_pdu_queue(response); 912 cfiscsi_session_terminate(cs); 913 break; 914 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 915 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 916 if (response == NULL) { 917 icl_pdu_free(request); 918 cfiscsi_session_terminate(cs); 919 return; 920 } 921 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 922 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 923 bhslr2->bhslr_flags = 0x80; 924 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 925 bhslr2->bhslr_initiator_task_tag = 926 bhslr->bhslr_initiator_task_tag; 927 icl_pdu_free(request); 928 cfiscsi_pdu_queue(response); 929 break; 930 default: 931 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 932 bhslr->bhslr_reason); 933 icl_pdu_free(request); 934 cfiscsi_session_terminate(cs); 935 break; 936 } 937} 938 939static void 940cfiscsi_callout(void *context) 941{ 942 struct icl_pdu *cp; 943 struct iscsi_bhs_nop_in *bhsni; 944 struct cfiscsi_session *cs; 945 946 cs = context; 947 948 if (cs->cs_terminating) 949 return; 950 951 callout_schedule(&cs->cs_callout, 1 * hz); 952 953 CFISCSI_SESSION_LOCK(cs); 954 cs->cs_timeout++; 955 CFISCSI_SESSION_UNLOCK(cs); 956 957#ifdef ICL_KERNEL_PROXY 958 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 959 if (cs->cs_timeout > login_timeout) { 960 CFISCSI_SESSION_WARN(cs, "login timed out after " 961 "%d seconds; dropping connection", cs->cs_timeout); 962 cfiscsi_session_terminate(cs); 963 } 964 return; 965 } 966#endif 967 968 if (cs->cs_timeout >= ping_timeout) { 969 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 970 "dropping connection", ping_timeout); 971 cfiscsi_session_terminate(cs); 972 return; 973 } 974 975 /* 976 * If the ping was reset less than one second ago - which means 977 * that we've received some PDU during the last second - assume 978 * the traffic flows correctly and don't bother sending a NOP-Out. 979 * 980 * (It's 2 - one for one second, and one for incrementing is_timeout 981 * earlier in this routine.) 982 */ 983 if (cs->cs_timeout < 2) 984 return; 985 986 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 987 if (cp == NULL) { 988 CFISCSI_SESSION_WARN(cs, "failed to allocate PDU"); 989 return; 990 } 991 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 992 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 993 bhsni->bhsni_flags = 0x80; 994 bhsni->bhsni_initiator_task_tag = 0xffffffff; 995 996 cfiscsi_pdu_queue(cp); 997} 998 999static void 1000cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1001{ 1002 struct cfiscsi_data_wait *cdw, *tmpcdw; 1003 union ctl_io *io; 1004 int error; 1005 1006#ifdef notyet 1007 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1008 if (io == NULL) { 1009 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1010 return; 1011 } 1012 ctl_zero_io(io); 1013 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1014 io->io_hdr.io_type = CTL_IO_TASK; 1015 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1016 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 1017 io->io_hdr.nexus.targ_target.id = 0; 1018 io->io_hdr.nexus.targ_lun = lun; 1019 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1020 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 1021 error = ctl_queue(io); 1022 if (error != CTL_RETVAL_COMPLETE) { 1023 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1024 ctl_free_io(io); 1025 } 1026#else 1027 /* 1028 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1029 * just iterate over tasks that are waiting for something - data - and 1030 * terminate those. 1031 */ 1032 CFISCSI_SESSION_LOCK(cs); 1033 TAILQ_FOREACH_SAFE(cdw, 1034 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1035 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1036 if (io == NULL) { 1037 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1038 return; 1039 } 1040 ctl_zero_io(io); 1041 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1042 io->io_hdr.io_type = CTL_IO_TASK; 1043 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1044 io->io_hdr.nexus.targ_port = 1045 cs->cs_target->ct_softc->fe.targ_port; 1046 io->io_hdr.nexus.targ_target.id = 0; 1047 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1048 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1049 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1050 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 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 return; 1056 } 1057#if 0 1058 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1059 "0x%x", cdw->cdw_initiator_task_tag); 1060#endif 1061 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1062 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1063 uma_zfree(cfiscsi_data_wait_zone, cdw); 1064 } 1065 CFISCSI_SESSION_UNLOCK(cs); 1066#endif 1067} 1068 1069static void 1070cfiscsi_maintenance_thread(void *arg) 1071{ 1072 struct cfiscsi_session *cs; 1073 1074 cs = arg; 1075 1076 for (;;) { 1077 CFISCSI_SESSION_LOCK(cs); 1078 if (cs->cs_terminating == false) 1079 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1080 CFISCSI_SESSION_UNLOCK(cs); 1081 1082 if (cs->cs_terminating) { 1083 cfiscsi_session_terminate_tasks(cs); 1084 callout_drain(&cs->cs_callout); 1085 1086 icl_conn_shutdown(cs->cs_conn); 1087 icl_conn_close(cs->cs_conn); 1088 1089 cs->cs_terminating++; 1090 1091 /* 1092 * XXX: We used to wait up to 30 seconds to deliver queued PDUs 1093 * to the initiator. We also tried hard to deliver SCSI Responses 1094 * for the aborted PDUs. We don't do that anymore. We might need 1095 * to revisit that. 1096 */ 1097 1098 cfiscsi_session_delete(cs); 1099 kthread_exit(); 1100 return; 1101 } 1102 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1103 } 1104} 1105 1106static void 1107cfiscsi_session_terminate(struct cfiscsi_session *cs) 1108{ 1109 1110 if (cs->cs_terminating != 0) 1111 return; 1112 cs->cs_terminating = 1; 1113 cv_signal(&cs->cs_maintenance_cv); 1114} 1115 1116static int 1117cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1118{ 1119 int error, i; 1120 struct cfiscsi_softc *softc; 1121 1122 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1123 1124 softc = &cfiscsi_softc; 1125 1126 mtx_lock(&softc->lock); 1127 for (i = 0; i < softc->max_initiators; i++) { 1128 if (softc->ctl_initids[i] == 0) 1129 break; 1130 } 1131 if (i == softc->max_initiators) { 1132 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1133 softc->max_initiators); 1134 mtx_unlock(&softc->lock); 1135 return (1); 1136 } 1137 softc->ctl_initids[i] = 1; 1138 mtx_unlock(&softc->lock); 1139 1140#if 0 1141 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1142 i, softc->max_initiators); 1143#endif 1144 cs->cs_ctl_initid = i; 1145 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1146 if (error != 0) { 1147 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1148 mtx_lock(&softc->lock); 1149 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1150 mtx_unlock(&softc->lock); 1151 cs->cs_ctl_initid = -1; 1152 return (1); 1153 } 1154 1155 return (0); 1156} 1157 1158static void 1159cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1160{ 1161 int error; 1162 struct cfiscsi_softc *softc; 1163 1164 if (cs->cs_ctl_initid == -1) 1165 return; 1166 1167 softc = &cfiscsi_softc; 1168 1169 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1170 if (error != 0) { 1171 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1172 error); 1173 } 1174 mtx_lock(&softc->lock); 1175 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1176 mtx_unlock(&softc->lock); 1177 cs->cs_ctl_initid = -1; 1178} 1179 1180static struct cfiscsi_session * 1181cfiscsi_session_new(struct cfiscsi_softc *softc) 1182{ 1183 struct cfiscsi_session *cs; 1184 int error; 1185 1186 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1187 if (cs == NULL) { 1188 CFISCSI_WARN("malloc failed"); 1189 return (NULL); 1190 } 1191 cs->cs_ctl_initid = -1; 1192 1193 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1194 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1195 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1196 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1197#ifdef ICL_KERNEL_PROXY 1198 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1199#endif 1200 1201 cs->cs_conn = icl_conn_new(); 1202 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1203 cs->cs_conn->ic_error = cfiscsi_error_callback; 1204 cs->cs_conn->ic_prv0 = cs; 1205 1206 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1207 if (error != 0) { 1208 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1209 free(cs, M_CFISCSI); 1210 return (NULL); 1211 } 1212 1213 mtx_lock(&softc->lock); 1214 cs->cs_id = softc->last_session_id + 1; 1215 softc->last_session_id++; 1216 mtx_unlock(&softc->lock); 1217 1218 mtx_lock(&softc->lock); 1219 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1220 mtx_unlock(&softc->lock); 1221 1222 /* 1223 * Start pinging the initiator. 1224 */ 1225 callout_init(&cs->cs_callout, 1); 1226 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1227 1228 return (cs); 1229} 1230 1231static void 1232cfiscsi_session_delete(struct cfiscsi_session *cs) 1233{ 1234 struct cfiscsi_softc *softc; 1235 1236 softc = &cfiscsi_softc; 1237 1238 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1239 ("destroying session with outstanding CTL pdus")); 1240 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1241 ("destroying session with non-empty queue")); 1242 1243 cfiscsi_session_unregister_initiator(cs); 1244 if (cs->cs_target != NULL) 1245 cfiscsi_target_release(cs->cs_target); 1246 icl_conn_close(cs->cs_conn); 1247 icl_conn_free(cs->cs_conn); 1248 1249 mtx_lock(&softc->lock); 1250 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1251 mtx_unlock(&softc->lock); 1252 1253 free(cs, M_CFISCSI); 1254} 1255 1256int 1257cfiscsi_init(void) 1258{ 1259 struct cfiscsi_softc *softc; 1260 struct ctl_frontend *fe; 1261 int retval; 1262 1263 softc = &cfiscsi_softc; 1264 retval = 0; 1265 bzero(softc, sizeof(*softc)); 1266 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1267 1268#ifdef ICL_KERNEL_PROXY 1269 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1270#endif 1271 TAILQ_INIT(&softc->sessions); 1272 TAILQ_INIT(&softc->targets); 1273 1274 fe = &softc->fe; 1275 fe->port_type = CTL_PORT_ISCSI; 1276 /* XXX KDM what should the real number be here? */ 1277 fe->num_requested_ctl_io = 4096; 1278 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1279 fe->port_name = softc->port_name; 1280 fe->port_online = cfiscsi_online; 1281 fe->port_offline = cfiscsi_offline; 1282 fe->onoff_arg = softc; 1283 fe->targ_enable = cfiscsi_targ_enable; 1284 fe->targ_disable = cfiscsi_targ_disable; 1285 fe->lun_enable = cfiscsi_lun_enable; 1286 fe->lun_disable = cfiscsi_lun_disable; 1287 fe->targ_lun_arg = softc; 1288 fe->ioctl = cfiscsi_ioctl; 1289 fe->devid = cfiscsi_devid; 1290 fe->fe_datamove = cfiscsi_datamove; 1291 fe->fe_done = cfiscsi_done; 1292 1293 /* XXX KDM what should we report here? */ 1294 /* XXX These should probably be fetched from CTL. */ 1295 fe->max_targets = 1; 1296 fe->max_target_id = 15; 1297 1298 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1299 if (retval != 0) { 1300 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1301 retval); 1302 retval = 1; 1303 goto bailout; 1304 } 1305 1306 softc->max_initiators = fe->max_initiators; 1307 1308 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1309 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1310 UMA_ALIGN_PTR, 0); 1311 1312 return (0); 1313 1314bailout: 1315 return (retval); 1316} 1317 1318static int 1319cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1320{ 1321 1322 switch (what) { 1323 case MOD_LOAD: 1324 return (cfiscsi_init()); 1325 case MOD_UNLOAD: 1326 return (EBUSY); 1327 default: 1328 return (EOPNOTSUPP); 1329 } 1330} 1331 1332#ifdef ICL_KERNEL_PROXY 1333static void 1334cfiscsi_accept(struct socket *so) 1335{ 1336 struct cfiscsi_session *cs; 1337 1338 cs = cfiscsi_session_new(&cfiscsi_softc); 1339 if (cs == NULL) { 1340 CFISCSI_WARN("failed to create session"); 1341 return; 1342 } 1343 1344 icl_conn_handoff_sock(cs->cs_conn, so); 1345 cs->cs_waiting_for_ctld = true; 1346 cv_signal(&cfiscsi_softc.accept_cv); 1347} 1348#endif 1349 1350static void 1351cfiscsi_online(void *arg) 1352{ 1353 struct cfiscsi_softc *softc; 1354 1355 softc = (struct cfiscsi_softc *)arg; 1356 1357 softc->online = 1; 1358#ifdef ICL_KERNEL_PROXY 1359 if (softc->listener != NULL) 1360 icl_listen_free(softc->listener); 1361 softc->listener = icl_listen_new(cfiscsi_accept); 1362#endif 1363} 1364 1365static void 1366cfiscsi_offline(void *arg) 1367{ 1368 struct cfiscsi_softc *softc; 1369 struct cfiscsi_session *cs; 1370 1371 softc = (struct cfiscsi_softc *)arg; 1372 1373 softc->online = 0; 1374 1375 mtx_lock(&softc->lock); 1376 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1377 cfiscsi_session_terminate(cs); 1378 mtx_unlock(&softc->lock); 1379 1380#ifdef ICL_KERNEL_PROXY 1381 icl_listen_free(softc->listener); 1382 softc->listener = NULL; 1383#endif 1384} 1385 1386static int 1387cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1388{ 1389 1390 return (0); 1391} 1392 1393static int 1394cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1395{ 1396 1397 return (0); 1398} 1399 1400static void 1401cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1402{ 1403 struct cfiscsi_softc *softc; 1404 struct cfiscsi_session *cs; 1405 struct cfiscsi_target *ct; 1406 struct ctl_iscsi_handoff_params *cihp; 1407#ifndef ICL_KERNEL_PROXY 1408 int error; 1409#endif 1410 1411 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1412 softc = &cfiscsi_softc; 1413 1414 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1415 cihp->initiator_name, cihp->initiator_addr, 1416 cihp->target_name); 1417 1418 if (softc->online == 0) { 1419 ci->status = CTL_ISCSI_ERROR; 1420 snprintf(ci->error_str, sizeof(ci->error_str), 1421 "%s: port offline", __func__); 1422 return; 1423 } 1424 1425 ct = cfiscsi_target_find(softc, cihp->target_name); 1426 if (ct == NULL) { 1427 ci->status = CTL_ISCSI_ERROR; 1428 snprintf(ci->error_str, sizeof(ci->error_str), 1429 "%s: target not found", __func__); 1430 return; 1431 } 1432 1433#ifdef ICL_KERNEL_PROXY 1434 mtx_lock(&cfiscsi_softc.lock); 1435 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1436 if (cs->cs_id == cihp->socket) 1437 break; 1438 } 1439 if (cs == NULL) { 1440 mtx_unlock(&cfiscsi_softc.lock); 1441 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1442 ci->status = CTL_ISCSI_ERROR; 1443 return; 1444 } 1445 mtx_unlock(&cfiscsi_softc.lock); 1446#else 1447 cs = cfiscsi_session_new(softc); 1448 if (cs == NULL) { 1449 ci->status = CTL_ISCSI_ERROR; 1450 snprintf(ci->error_str, sizeof(ci->error_str), 1451 "%s: cfiscsi_session_new failed", __func__); 1452 cfiscsi_target_release(ct); 1453 return; 1454 } 1455#endif 1456 cs->cs_target = ct; 1457 1458 /* 1459 * First PDU of Full Feature phase has the same CmdSN as the last 1460 * PDU from the Login Phase received from the initiator. Thus, 1461 * the -1 below. 1462 */ 1463 cs->cs_portal_group_tag = cihp->portal_group_tag; 1464 cs->cs_cmdsn = cihp->cmdsn; 1465 cs->cs_statsn = cihp->statsn; 1466 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1467 cs->cs_max_burst_length = cihp->max_burst_length; 1468 cs->cs_immediate_data = !!cihp->immediate_data; 1469 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1470 cs->cs_conn->ic_header_crc32c = true; 1471 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1472 cs->cs_conn->ic_data_crc32c = true; 1473 1474 strlcpy(cs->cs_initiator_name, 1475 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1476 strlcpy(cs->cs_initiator_addr, 1477 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1478 strlcpy(cs->cs_initiator_alias, 1479 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1480 1481#ifdef ICL_KERNEL_PROXY 1482 cs->cs_login_phase = false; 1483#else 1484 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1485 if (error != 0) { 1486 cfiscsi_session_delete(cs); 1487 ci->status = CTL_ISCSI_ERROR; 1488 snprintf(ci->error_str, sizeof(ci->error_str), 1489 "%s: icl_conn_handoff failed with error %d", 1490 __func__, error); 1491 return; 1492 } 1493#endif 1494 1495 /* 1496 * Register initiator with CTL. 1497 */ 1498 cfiscsi_session_register_initiator(cs); 1499 1500#ifdef ICL_KERNEL_PROXY 1501 /* 1502 * First PDU of the Full Feature phase has likely already arrived. 1503 * We have to pick it up and execute properly. 1504 */ 1505 if (cs->cs_login_pdu != NULL) { 1506 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1507 cfiscsi_pdu_handle(cs->cs_login_pdu); 1508 cs->cs_login_pdu = NULL; 1509 } 1510#endif 1511 1512 ci->status = CTL_ISCSI_OK; 1513} 1514 1515static void 1516cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1517{ 1518 struct ctl_iscsi_list_params *cilp; 1519 struct cfiscsi_session *cs; 1520 struct cfiscsi_softc *softc; 1521 struct sbuf *sb; 1522 int error; 1523 1524 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1525 softc = &cfiscsi_softc; 1526 1527 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1528 if (sb == NULL) { 1529 ci->status = CTL_ISCSI_ERROR; 1530 snprintf(ci->error_str, sizeof(ci->error_str), 1531 "Unable to allocate %d bytes for iSCSI session list", 1532 cilp->alloc_len); 1533 return; 1534 } 1535 1536 sbuf_printf(sb, "<ctlislist>\n"); 1537 mtx_lock(&softc->lock); 1538 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1539#ifdef ICL_KERNEL_PROXY 1540 if (cs->cs_target == NULL) 1541 continue; 1542#endif 1543 error = sbuf_printf(sb, "<connection id=\"%d\">" 1544 "<initiator>%s</initiator>" 1545 "<initiator_addr>%s</initiator_addr>" 1546 "<initiator_alias>%s</initiator_alias>" 1547 "<target>%s</target>" 1548 "<target_alias>%s</target_alias>" 1549 "<header_digest>%s</header_digest>" 1550 "<data_digest>%s</data_digest>" 1551 "<max_data_segment_length>%zd</max_data_segment_length>" 1552 "<immediate_data>%d</immediate_data>" 1553 "<iser>%d</iser>" 1554 "</connection>\n", 1555 cs->cs_id, 1556 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1557 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1558 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1559 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1560 cs->cs_max_data_segment_length, 1561 cs->cs_immediate_data, 1562 cs->cs_conn->ic_iser); 1563 if (error != 0) 1564 break; 1565 } 1566 mtx_unlock(&softc->lock); 1567 error = sbuf_printf(sb, "</ctlislist>\n"); 1568 if (error != 0) { 1569 sbuf_delete(sb); 1570 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1571 snprintf(ci->error_str, sizeof(ci->error_str), 1572 "Out of space, %d bytes is too small", cilp->alloc_len); 1573 return; 1574 } 1575 sbuf_finish(sb); 1576 1577 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1578 cilp->fill_len = sbuf_len(sb) + 1; 1579 ci->status = CTL_ISCSI_OK; 1580 sbuf_delete(sb); 1581} 1582 1583static void 1584cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1585{ 1586 struct icl_pdu *response; 1587 struct iscsi_bhs_asynchronous_message *bhsam; 1588 struct ctl_iscsi_terminate_params *citp; 1589 struct cfiscsi_session *cs; 1590 struct cfiscsi_softc *softc; 1591 int found = 0; 1592 1593 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1594 softc = &cfiscsi_softc; 1595 1596 mtx_lock(&softc->lock); 1597 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1598 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1599 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1600 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1601 continue; 1602 1603 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1604 if (response == NULL) { 1605 /* 1606 * Oh well. Just terminate the connection. 1607 */ 1608 } else { 1609 bhsam = (struct iscsi_bhs_asynchronous_message *) 1610 response->ip_bhs; 1611 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1612 bhsam->bhsam_flags = 0x80; 1613 bhsam->bhsam_0xffffffff = 0xffffffff; 1614 bhsam->bhsam_async_event = 1615 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1616 cfiscsi_pdu_queue(response); 1617 } 1618 cfiscsi_session_terminate(cs); 1619 found++; 1620 } 1621 mtx_unlock(&softc->lock); 1622 1623 if (found == 0) { 1624 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1625 snprintf(ci->error_str, sizeof(ci->error_str), 1626 "No matching connections found"); 1627 return; 1628 } 1629 1630 ci->status = CTL_ISCSI_OK; 1631} 1632 1633static void 1634cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1635{ 1636 struct icl_pdu *response; 1637 struct iscsi_bhs_asynchronous_message *bhsam; 1638 struct ctl_iscsi_logout_params *cilp; 1639 struct cfiscsi_session *cs; 1640 struct cfiscsi_softc *softc; 1641 int found = 0; 1642 1643 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1644 softc = &cfiscsi_softc; 1645 1646 mtx_lock(&softc->lock); 1647 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1648 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1649 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1650 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1651 continue; 1652 1653 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1654 if (response == NULL) { 1655 ci->status = CTL_ISCSI_ERROR; 1656 snprintf(ci->error_str, sizeof(ci->error_str), 1657 "Unable to allocate memory"); 1658 mtx_unlock(&softc->lock); 1659 return; 1660 } 1661 bhsam = 1662 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1663 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1664 bhsam->bhsam_flags = 0x80; 1665 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1666 bhsam->bhsam_parameter3 = htons(10); 1667 cfiscsi_pdu_queue(response); 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 1682#ifdef ICL_KERNEL_PROXY 1683static void 1684cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1685{ 1686 struct ctl_iscsi_listen_params *cilp; 1687 struct sockaddr *sa; 1688 int error; 1689 1690 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1691 1692 if (cfiscsi_softc.listener == NULL) { 1693 CFISCSI_DEBUG("no listener"); 1694 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1695 ci->status = CTL_ISCSI_ERROR; 1696 return; 1697 } 1698 1699 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1700 if (error != 0) { 1701 CFISCSI_DEBUG("getsockaddr, error %d", error); 1702 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1703 ci->status = CTL_ISCSI_ERROR; 1704 return; 1705 } 1706 1707 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1708 cilp->socktype, cilp->protocol, sa); 1709 if (error != 0) { 1710 free(sa, M_SONAME); 1711 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1712 snprintf(ci->error_str, sizeof(ci->error_str), 1713 "icl_listen_add failed, error %d", error); 1714 ci->status = CTL_ISCSI_ERROR; 1715 return; 1716 } 1717 1718 ci->status = CTL_ISCSI_OK; 1719} 1720 1721static void 1722cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1723{ 1724 struct ctl_iscsi_accept_params *ciap; 1725 struct cfiscsi_session *cs; 1726 int error; 1727 1728 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1729 1730 mtx_lock(&cfiscsi_softc.lock); 1731 for (;;) { 1732 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1733 if (cs->cs_waiting_for_ctld) 1734 break; 1735 } 1736 if (cs != NULL) 1737 break; 1738 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1739 if (error != 0) { 1740 mtx_unlock(&cfiscsi_softc.lock); 1741 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1742 ci->status = CTL_ISCSI_ERROR; 1743 return; 1744 } 1745 } 1746 mtx_unlock(&cfiscsi_softc.lock); 1747 1748 cs->cs_waiting_for_ctld = false; 1749 cs->cs_login_phase = true; 1750 1751 ciap->connection_id = cs->cs_id; 1752 ci->status = CTL_ISCSI_OK; 1753} 1754 1755static void 1756cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1757{ 1758 struct ctl_iscsi_send_params *cisp; 1759 struct cfiscsi_session *cs; 1760 struct icl_pdu *ip; 1761 size_t datalen; 1762 void *data; 1763 int error; 1764 1765 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1766 1767 mtx_lock(&cfiscsi_softc.lock); 1768 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1769 if (cs->cs_id == cisp->connection_id) 1770 break; 1771 } 1772 if (cs == NULL) { 1773 mtx_unlock(&cfiscsi_softc.lock); 1774 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1775 ci->status = CTL_ISCSI_ERROR; 1776 return; 1777 } 1778 mtx_unlock(&cfiscsi_softc.lock); 1779 1780#if 0 1781 if (cs->cs_login_phase == false) 1782 return (EBUSY); 1783#endif 1784 1785 if (cs->cs_terminating) { 1786 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1787 ci->status = CTL_ISCSI_ERROR; 1788 return; 1789 } 1790 1791 datalen = cisp->data_segment_len; 1792 /* 1793 * XXX 1794 */ 1795 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1796 if (datalen > 65535) { 1797 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1798 ci->status = CTL_ISCSI_ERROR; 1799 return; 1800 } 1801 if (datalen > 0) { 1802 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1803 error = copyin(cisp->data_segment, data, datalen); 1804 if (error != 0) { 1805 free(data, M_CFISCSI); 1806 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1807 ci->status = CTL_ISCSI_ERROR; 1808 return; 1809 } 1810 } 1811 1812 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1813 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1814 if (datalen > 0) { 1815 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1816 free(data, M_CFISCSI); 1817 } 1818 icl_pdu_queue(ip); 1819 ci->status = CTL_ISCSI_OK; 1820} 1821 1822static void 1823cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1824{ 1825 struct ctl_iscsi_receive_params *cirp; 1826 struct cfiscsi_session *cs; 1827 struct icl_pdu *ip; 1828 void *data; 1829 1830 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1831 1832 mtx_lock(&cfiscsi_softc.lock); 1833 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1834 if (cs->cs_id == cirp->connection_id) 1835 break; 1836 } 1837 if (cs == NULL) { 1838 mtx_unlock(&cfiscsi_softc.lock); 1839 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1840 ci->status = CTL_ISCSI_ERROR; 1841 return; 1842 } 1843 mtx_unlock(&cfiscsi_softc.lock); 1844 1845#if 0 1846 if (is->is_login_phase == false) 1847 return (EBUSY); 1848#endif 1849 1850 CFISCSI_SESSION_LOCK(cs); 1851 while (cs->cs_login_pdu == NULL && 1852 cs->cs_terminating == false) 1853 cv_wait(&cs->cs_login_cv, &cs->cs_lock); 1854 if (cs->cs_terminating) { 1855 CFISCSI_SESSION_UNLOCK(cs); 1856 snprintf(ci->error_str, sizeof(ci->error_str), "connection terminating"); 1857 ci->status = CTL_ISCSI_ERROR; 1858 return; 1859 } 1860 ip = cs->cs_login_pdu; 1861 cs->cs_login_pdu = NULL; 1862 CFISCSI_SESSION_UNLOCK(cs); 1863 1864 if (ip->ip_data_len > cirp->data_segment_len) { 1865 icl_pdu_free(ip); 1866 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1867 ci->status = CTL_ISCSI_ERROR; 1868 return; 1869 } 1870 1871 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1872 if (ip->ip_data_len > 0) { 1873 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1874 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1875 copyout(data, cirp->data_segment, ip->ip_data_len); 1876 free(data, M_CFISCSI); 1877 } 1878 1879 icl_pdu_free(ip); 1880 ci->status = CTL_ISCSI_OK; 1881} 1882 1883static void 1884cfiscsi_ioctl_close(struct ctl_iscsi *ci) 1885{ 1886 /* 1887 * XXX 1888 */ 1889} 1890#endif /* !ICL_KERNEL_PROXY */ 1891 1892static int 1893cfiscsi_ioctl(struct cdev *dev, 1894 u_long cmd, caddr_t addr, int flag, struct thread *td) 1895{ 1896 struct ctl_iscsi *ci; 1897 1898 if (cmd != CTL_ISCSI) 1899 return (ENOTTY); 1900 1901 ci = (struct ctl_iscsi *)addr; 1902 switch (ci->type) { 1903 case CTL_ISCSI_HANDOFF: 1904 cfiscsi_ioctl_handoff(ci); 1905 break; 1906 case CTL_ISCSI_LIST: 1907 cfiscsi_ioctl_list(ci); 1908 break; 1909 case CTL_ISCSI_TERMINATE: 1910 cfiscsi_ioctl_terminate(ci); 1911 break; 1912 case CTL_ISCSI_LOGOUT: 1913 cfiscsi_ioctl_logout(ci); 1914 break; 1915#ifdef ICL_KERNEL_PROXY 1916 case CTL_ISCSI_LISTEN: 1917 cfiscsi_ioctl_listen(ci); 1918 break; 1919 case CTL_ISCSI_ACCEPT: 1920 cfiscsi_ioctl_accept(ci); 1921 break; 1922 case CTL_ISCSI_SEND: 1923 cfiscsi_ioctl_send(ci); 1924 break; 1925 case CTL_ISCSI_RECEIVE: 1926 cfiscsi_ioctl_receive(ci); 1927 break; 1928 case CTL_ISCSI_CLOSE: 1929 cfiscsi_ioctl_close(ci); 1930 break; 1931#endif /* ICL_KERNEL_PROXY */ 1932 default: 1933 ci->status = CTL_ISCSI_ERROR; 1934 snprintf(ci->error_str, sizeof(ci->error_str), 1935 "%s: invalid iSCSI request type %d", __func__, ci->type); 1936 break; 1937 } 1938 1939 return (0); 1940} 1941 1942static int 1943cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 1944{ 1945 struct cfiscsi_session *cs; 1946 struct scsi_vpd_device_id *devid_ptr; 1947 struct scsi_vpd_id_descriptor *desc, *desc1; 1948 struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */ 1949 struct scsi_vpd_id_t10 *t10id; 1950 struct ctl_lun *lun; 1951 const struct icl_pdu *request; 1952 size_t devid_len, wwpn_len; 1953 1954 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 1955 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 1956 cs = PDU_SESSION(request); 1957 1958 wwpn_len = strlen(cs->cs_target->ct_name); 1959 wwpn_len += strlen(",t,0x01"); 1960 wwpn_len += 1; /* '\0' */ 1961 if ((wwpn_len % 4) != 0) 1962 wwpn_len += (4 - (wwpn_len % 4)); 1963 1964 devid_len = sizeof(struct scsi_vpd_device_id) + 1965 sizeof(struct scsi_vpd_id_descriptor) + 1966 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 1967 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 1968 sizeof(struct scsi_vpd_id_descriptor) + 1969 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 1970 sizeof(struct scsi_vpd_id_descriptor) + 1971 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 1972 1973 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 1974 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 1975 ctsio->kern_sg_entries = 0; 1976 1977 if (devid_len < alloc_len) { 1978 ctsio->residual = alloc_len - devid_len; 1979 ctsio->kern_data_len = devid_len; 1980 ctsio->kern_total_len = devid_len; 1981 } else { 1982 ctsio->residual = 0; 1983 ctsio->kern_data_len = alloc_len; 1984 ctsio->kern_total_len = alloc_len; 1985 } 1986 ctsio->kern_data_resid = 0; 1987 ctsio->kern_rel_offset = 0; 1988 ctsio->kern_sg_entries = 0; 1989 1990 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 1991 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 1992 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 1993 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 1994 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 1995 wwpn_len); 1996 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 1997 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 1998 1999 if (lun != NULL) 2000 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 2001 lun->be_lun->lun_type; 2002 else 2003 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 2004 2005 devid_ptr->page_code = SVPD_DEVICE_ID; 2006 2007 scsi_ulto2b(devid_len - 4, devid_ptr->length); 2008 2009 /* 2010 * We're using a LUN association here. i.e., this device ID is a 2011 * per-LUN identifier. 2012 */ 2013 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 2014 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 2015 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 2016 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 2017 2018 /* 2019 * If we've actually got a backend, copy the device id from the 2020 * per-LUN data. Otherwise, set it to all spaces. 2021 */ 2022 if (lun != NULL) { 2023 /* 2024 * Copy the backend's LUN ID. 2025 */ 2026 strncpy((char *)t10id->vendor_spec_id, 2027 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2028 } else { 2029 /* 2030 * No backend, set this to spaces. 2031 */ 2032 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2033 } 2034 2035 /* 2036 * desc1 is for the WWPN which is a port asscociation. 2037 */ 2038 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2039 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2040 SVPD_ID_TYPE_SCSI_NAME; 2041 desc1->length = wwpn_len; 2042 snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x", 2043 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2044 2045 /* 2046 * desc2 is for the Relative Target Port(type 4h) identifier 2047 */ 2048 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2049 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2050 SVPD_ID_TYPE_RELTARG; 2051 desc2->length = 4; 2052 desc2->identifier[3] = 1; 2053 2054 /* 2055 * desc3 is for the Target Port Group(type 5h) identifier 2056 */ 2057 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2058 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2059 SVPD_ID_TYPE_TPORTGRP; 2060 desc3->length = 4; 2061 desc3->identifier[3] = 1; 2062 2063 ctsio->scsi_status = SCSI_STATUS_OK; 2064 2065 ctsio->be_move_done = ctl_config_move_done; 2066 ctl_datamove((union ctl_io *)ctsio); 2067 2068 return (CTL_RETVAL_COMPLETE); 2069} 2070 2071static void 2072cfiscsi_target_hold(struct cfiscsi_target *ct) 2073{ 2074 2075 refcount_acquire(&ct->ct_refcount); 2076} 2077 2078static void 2079cfiscsi_target_release(struct cfiscsi_target *ct) 2080{ 2081 int old; 2082 struct cfiscsi_softc *softc; 2083 2084 softc = ct->ct_softc; 2085 2086 old = ct->ct_refcount; 2087 if (old > 1 && atomic_cmpset_int(&ct->ct_refcount, old, old - 1)) 2088 return; 2089 2090 mtx_lock(&softc->lock); 2091 if (refcount_release(&ct->ct_refcount)) { 2092 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2093 mtx_unlock(&softc->lock); 2094 free(ct, M_CFISCSI); 2095 2096 return; 2097 } 2098 mtx_unlock(&softc->lock); 2099} 2100 2101static struct cfiscsi_target * 2102cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2103{ 2104 struct cfiscsi_target *ct; 2105 2106 mtx_lock(&softc->lock); 2107 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2108 if (strcmp(name, ct->ct_name) != 0) 2109 continue; 2110 cfiscsi_target_hold(ct); 2111 mtx_unlock(&softc->lock); 2112 return (ct); 2113 } 2114 mtx_unlock(&softc->lock); 2115 2116 return (NULL); 2117} 2118 2119static struct cfiscsi_target * 2120cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2121 const char *alias) 2122{ 2123 struct cfiscsi_target *ct, *newct; 2124 int i; 2125 2126 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2127 return (NULL); 2128 2129 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2130 2131 mtx_lock(&softc->lock); 2132 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2133 if (strcmp(name, ct->ct_name) != 0) 2134 continue; 2135 cfiscsi_target_hold(ct); 2136 mtx_unlock(&softc->lock); 2137 free(newct, M_CFISCSI); 2138 return (ct); 2139 } 2140 2141 for (i = 0; i < CTL_MAX_LUNS; i++) 2142 newct->ct_luns[i] = -1; 2143 2144 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2145 if (alias != NULL) 2146 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2147 refcount_init(&newct->ct_refcount, 1); 2148 newct->ct_softc = softc; 2149 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2150 mtx_unlock(&softc->lock); 2151 2152 return (newct); 2153} 2154 2155/* 2156 * Takes LUN from the target space and returns LUN from the CTL space. 2157 */ 2158static uint32_t 2159cfiscsi_map_lun(void *arg, uint32_t lun) 2160{ 2161 struct cfiscsi_session *cs; 2162 2163 cs = arg; 2164 2165 if (lun >= CTL_MAX_LUNS) { 2166 CFISCSI_DEBUG("requested lun number %d is higher " 2167 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2168 return (0xffffffff); 2169 } 2170 2171 if (cs->cs_target->ct_luns[lun] < 0) 2172 return (0xffffffff); 2173 2174 return (cs->cs_target->ct_luns[lun]); 2175} 2176 2177static int 2178cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2179 unsigned long lun_id, unsigned long ctl_lun_id) 2180{ 2181 2182 if (lun_id >= CTL_MAX_LUNS) { 2183 CFISCSI_WARN("requested lun number %ld is higher " 2184 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2185 return (-1); 2186 } 2187 2188 if (ct->ct_luns[lun_id] >= 0) { 2189 /* 2190 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2191 * when the LUN is created, and a second time just before 2192 * the port is brought online; don't emit warnings 2193 * for that case. 2194 */ 2195 if (ct->ct_luns[lun_id] == ctl_lun_id) 2196 return (0); 2197 CFISCSI_WARN("lun %ld already allocated", lun_id); 2198 return (-1); 2199 } 2200 2201#if 0 2202 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2203 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2204#endif 2205 2206 ct->ct_luns[lun_id] = ctl_lun_id; 2207 cfiscsi_target_hold(ct); 2208 2209 return (0); 2210} 2211 2212static int 2213cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2214{ 2215 2216 if (ct->ct_luns[lun_id] < 0) { 2217 CFISCSI_WARN("lun %ld not allocated", lun_id); 2218 return (-1); 2219 } 2220 2221 ct->ct_luns[lun_id] = -1; 2222 cfiscsi_target_release(ct); 2223 2224 return (0); 2225} 2226 2227static int 2228cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2229{ 2230 struct cfiscsi_softc *softc; 2231 struct cfiscsi_target *ct; 2232 struct ctl_be_lun_option *opt; 2233 const char *target = NULL, *target_alias = NULL; 2234 const char *lun = NULL; 2235 unsigned long tmp; 2236 2237 softc = (struct cfiscsi_softc *)arg; 2238 2239 STAILQ_FOREACH(opt, 2240 &control_softc->ctl_luns[lun_id]->be_lun->options, links) { 2241 if (strcmp(opt->name, "cfiscsi_target") == 0) 2242 target = opt->value; 2243 else if (strcmp(opt->name, "cfiscsi_target_alias") == 0) 2244 target_alias = opt->value; 2245 else if (strcmp(opt->name, "cfiscsi_lun") == 0) 2246 lun = opt->value; 2247 } 2248 2249 if (target == NULL && lun == NULL) 2250 return (0); 2251 2252 if (target == NULL || lun == NULL) { 2253 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2254 "cfiscsi_lun, or the other way around; ignoring"); 2255 return (0); 2256 } 2257 2258 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2259 if (ct == NULL) { 2260 CFISCSI_WARN("failed to create target \"%s\"", target); 2261 return (0); 2262 } 2263 2264 tmp = strtoul(lun, NULL, 10); 2265 cfiscsi_target_set_lun(ct, tmp, lun_id); 2266 return (0); 2267} 2268 2269static int 2270cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2271{ 2272 struct cfiscsi_softc *softc; 2273 struct cfiscsi_target *ct; 2274 int i; 2275 2276 softc = (struct cfiscsi_softc *)arg; 2277 2278 mtx_lock(&softc->lock); 2279 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2280 for (i = 0; i < CTL_MAX_LUNS; i++) { 2281 if (ct->ct_luns[i] < 0) 2282 continue; 2283 if (ct->ct_luns[i] != lun_id) 2284 continue; 2285 cfiscsi_target_unset_lun(ct, i); 2286 break; 2287 } 2288 } 2289 mtx_unlock(&softc->lock); 2290 return (0); 2291} 2292 2293static void 2294cfiscsi_datamove_in(union ctl_io *io) 2295{ 2296 struct cfiscsi_session *cs; 2297 struct icl_pdu *request, *response; 2298 const struct iscsi_bhs_scsi_command *bhssc; 2299 struct iscsi_bhs_data_in *bhsdi; 2300 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2301 size_t copy_len, len, off; 2302 const char *addr; 2303 int ctl_sg_count, error, i; 2304 2305 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2306 cs = PDU_SESSION(request); 2307 2308 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2309 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2310 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2311 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2312 2313 if (io->scsiio.kern_sg_entries > 0) { 2314 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2315 ctl_sg_count = io->scsiio.kern_sg_entries; 2316 } else { 2317 ctl_sglist = &ctl_sg_entry; 2318 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2319 ctl_sglist->len = io->scsiio.kern_data_len; 2320 ctl_sg_count = 1; 2321 } 2322 2323 /* 2324 * We need to record it so that we can properly report 2325 * underflow/underflow. 2326 */ 2327 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2328 2329#if 0 2330 if (ctl_sg_count > 1) 2331 CFISCSI_SESSION_DEBUG(cs, "ctl_sg_count = %d", ctl_sg_count); 2332#endif 2333 2334 /* 2335 * This is the offset within the current SCSI command; 2336 * i.e. for the first call of datamove(), it will be 0, 2337 * and for subsequent ones it will be the sum of lengths 2338 * of previous ones. 2339 */ 2340 off = htonl(io->scsiio.kern_rel_offset); 2341 if (off > 1) 2342 CFISCSI_SESSION_DEBUG(cs, "off = %zd", off); 2343 2344 i = 0; 2345 addr = NULL; 2346 len = 0; 2347 response = NULL; 2348 bhsdi = NULL; 2349 for (;;) { 2350 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2351 if (response == NULL) { 2352 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2353 if (response == NULL) { 2354 CFISCSI_SESSION_WARN(cs, "failed to " 2355 "allocate memory; dropping connection"); 2356 ctl_set_busy(&io->scsiio); 2357 io->scsiio.be_move_done(io); 2358 cfiscsi_session_terminate(cs); 2359 return; 2360 } 2361 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2362 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2363 bhsdi->bhsdi_initiator_task_tag = 2364 bhssc->bhssc_initiator_task_tag; 2365 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2366 PDU_EXPDATASN(request)++; 2367 bhsdi->bhsdi_buffer_offset = htonl(off); 2368 } 2369 2370 if (len == 0) { 2371 addr = ctl_sglist[i].addr; 2372 len = ctl_sglist[i].len; 2373 KASSERT(len > 0, ("len <= 0")); 2374 } 2375 2376 copy_len = len; 2377 if (response->ip_data_len + copy_len > 2378 cs->cs_max_data_segment_length) 2379 copy_len = cs->cs_max_data_segment_length - 2380 response->ip_data_len; 2381 KASSERT(copy_len <= len, ("copy_len > len")); 2382 error = icl_pdu_append_data(response, addr, copy_len, M_NOWAIT); 2383 if (error != 0) { 2384 CFISCSI_SESSION_WARN(cs, "failed to " 2385 "allocate memory; dropping connection"); 2386 icl_pdu_free(response); 2387 ctl_set_busy(&io->scsiio); 2388 io->scsiio.be_move_done(io); 2389 cfiscsi_session_terminate(cs); 2390 return; 2391 } 2392 addr += copy_len; 2393 len -= copy_len; 2394 off += copy_len; 2395 io->scsiio.ext_data_filled += copy_len; 2396 2397 if (len == 0) { 2398 /* 2399 * End of scatter-gather segment; 2400 * proceed to the next one... 2401 */ 2402 if (i == ctl_sg_count - 1) { 2403 /* 2404 * ... unless this was the last one. 2405 */ 2406 break; 2407 } 2408 i++; 2409 } 2410 2411 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2412 /* 2413 * Can't stuff more data into the current PDU; 2414 * queue it. Note that's not enough to check 2415 * for kern_data_resid == 0 instead; there 2416 * may be several Data-In PDUs for the final 2417 * call to cfiscsi_datamove(), and we want 2418 * to set the F flag only on the last of them. 2419 */ 2420 if (off == io->scsiio.kern_total_len) 2421 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2422 KASSERT(response->ip_data_len > 0, 2423 ("sending empty Data-In")); 2424 cfiscsi_pdu_queue(response); 2425 response = NULL; 2426 bhsdi = NULL; 2427 } 2428 } 2429 KASSERT(i == ctl_sg_count - 1, ("missed SG segment")); 2430 KASSERT(len == 0, ("missed data from SG segment")); 2431 if (response != NULL) { 2432 if (off == io->scsiio.kern_total_len) { 2433 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2434 } else { 2435 CFISCSI_SESSION_DEBUG(cs, "not setting the F flag; " 2436 "have %zd, need %zd", off, 2437 (size_t)io->scsiio.kern_total_len); 2438 } 2439 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2440 cfiscsi_pdu_queue(response); 2441 } 2442 2443 io->scsiio.be_move_done(io); 2444} 2445 2446static void 2447cfiscsi_datamove_out(union ctl_io *io) 2448{ 2449 struct cfiscsi_session *cs; 2450 struct icl_pdu *request, *response; 2451 const struct iscsi_bhs_scsi_command *bhssc; 2452 struct iscsi_bhs_r2t *bhsr2t; 2453 struct cfiscsi_data_wait *cdw; 2454 uint32_t target_transfer_tag; 2455 bool done; 2456 2457 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2458 cs = PDU_SESSION(request); 2459 2460 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2461 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2462 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2463 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2464 2465 /* 2466 * We need to record it so that we can properly report 2467 * underflow/underflow. 2468 */ 2469 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2470 2471 CFISCSI_SESSION_LOCK(cs); 2472 target_transfer_tag = cs->cs_target_transfer_tag; 2473 cs->cs_target_transfer_tag++; 2474 CFISCSI_SESSION_UNLOCK(cs); 2475 2476#if 0 2477 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2478 "task tag 0x%x, target transfer tag 0x%x", 2479 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2480#endif 2481 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2482 if (cdw == NULL) { 2483 CFISCSI_SESSION_WARN(cs, "failed to " 2484 "allocate memory; dropping connection"); 2485 ctl_set_busy(&io->scsiio); 2486 io->scsiio.be_move_done(io); 2487 cfiscsi_session_terminate(cs); 2488 return; 2489 } 2490 cdw->cdw_ctl_io = io; 2491 cdw->cdw_target_transfer_tag = htonl(target_transfer_tag); 2492 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2493 2494 if (cs->cs_immediate_data && icl_pdu_data_segment_length(request) > 0) { 2495 done = cfiscsi_handle_data_segment(request, cdw); 2496 if (done) { 2497 uma_zfree(cfiscsi_data_wait_zone, cdw); 2498 io->scsiio.be_move_done(io); 2499 return; 2500 } 2501 2502#if 0 2503 if (io->scsiio.ext_data_filled != 0) 2504 CFISCSI_SESSION_DEBUG(cs, "got %zd bytes of immediate data, need %zd", 2505 io->scsiio.ext_data_filled, io->scsiio.kern_data_len); 2506#endif 2507 } 2508 2509 CFISCSI_SESSION_LOCK(cs); 2510 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2511 CFISCSI_SESSION_UNLOCK(cs); 2512 2513 /* 2514 * XXX: We should limit the number of outstanding R2T PDUs 2515 * per task to MaxOutstandingR2T. 2516 */ 2517 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2518 if (response == NULL) { 2519 CFISCSI_SESSION_WARN(cs, "failed to " 2520 "allocate memory; dropping connection"); 2521 ctl_set_busy(&io->scsiio); 2522 io->scsiio.be_move_done(io); 2523 cfiscsi_session_terminate(cs); 2524 return; 2525 } 2526 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2527 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2528 bhsr2t->bhsr2t_flags = 0x80; 2529 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2530 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2531 bhsr2t->bhsr2t_target_transfer_tag = htonl(target_transfer_tag); 2532 /* 2533 * XXX: Here we assume that cfiscsi_datamove() won't ever 2534 * be running concurrently on several CPUs for a given 2535 * command. 2536 */ 2537 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2538 PDU_R2TSN(request)++; 2539 /* 2540 * This is the offset within the current SCSI command; 2541 * i.e. for the first call of datamove(), it will be 0, 2542 * and for subsequent ones it will be the sum of lengths 2543 * of previous ones. 2544 * 2545 * The ext_data_filled is to account for unsolicited 2546 * (immediate) data that might have already arrived. 2547 */ 2548 bhsr2t->bhsr2t_buffer_offset = 2549 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2550 /* 2551 * This is the total length (sum of S/G lengths) this call 2552 * to cfiscsi_datamove() is supposed to handle. 2553 * 2554 * XXX: Limit it to MaxBurstLength. 2555 */ 2556 bhsr2t->bhsr2t_desired_data_transfer_length = 2557 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2558 cfiscsi_pdu_queue(response); 2559} 2560 2561static void 2562cfiscsi_datamove(union ctl_io *io) 2563{ 2564 2565 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2566 cfiscsi_datamove_in(io); 2567 else 2568 cfiscsi_datamove_out(io); 2569} 2570 2571static void 2572cfiscsi_scsi_command_done(union ctl_io *io) 2573{ 2574 struct icl_pdu *request, *response; 2575 struct iscsi_bhs_scsi_command *bhssc; 2576 struct iscsi_bhs_scsi_response *bhssr; 2577#ifdef DIAGNOSTIC 2578 struct cfiscsi_data_wait *cdw; 2579#endif 2580 struct cfiscsi_session *cs; 2581 uint16_t sense_length; 2582 2583 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2584 cs = PDU_SESSION(request); 2585 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2586 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2587 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2588 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2589 2590 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2591 // bhssc->bhssc_initiator_task_tag); 2592 2593#ifdef DIAGNOSTIC 2594 CFISCSI_SESSION_LOCK(cs); 2595 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2596 KASSERT(bhssc->bhssc_initiator_task_tag != 2597 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2598 CFISCSI_SESSION_UNLOCK(cs); 2599#endif 2600 2601 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2602 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2603 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2604 bhssr->bhssr_flags = 0x80; 2605 /* 2606 * XXX: We don't deal with bidirectional under/overflows; 2607 * does anything actually support those? 2608 */ 2609 if (PDU_TOTAL_TRANSFER_LEN(request) < 2610 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2611 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2612 bhssr->bhssr_residual_count = 2613 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2614 PDU_TOTAL_TRANSFER_LEN(request)); 2615 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2616 // ntohl(bhssr->bhssr_residual_count)); 2617 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2618 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2619 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2620 bhssr->bhssr_residual_count = 2621 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2622 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2623 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2624 // ntohl(bhssr->bhssr_residual_count)); 2625 } 2626 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2627 bhssr->bhssr_status = io->scsiio.scsi_status; 2628 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2629 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2630 2631 if (io->scsiio.sense_len > 0) { 2632#if 0 2633 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2634 io->scsiio.sense_len); 2635#endif 2636 sense_length = htons(io->scsiio.sense_len); 2637 icl_pdu_append_data(response, 2638 &sense_length, sizeof(sense_length), M_WAITOK); 2639 icl_pdu_append_data(response, 2640 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2641 } 2642 2643 ctl_free_io(io); 2644 icl_pdu_free(request); 2645 cfiscsi_pdu_queue(response); 2646} 2647 2648static void 2649cfiscsi_task_management_done(union ctl_io *io) 2650{ 2651 struct icl_pdu *request, *response; 2652 struct iscsi_bhs_task_management_request *bhstmr; 2653 struct iscsi_bhs_task_management_response *bhstmr2; 2654 struct cfiscsi_data_wait *cdw, *tmpcdw; 2655 struct cfiscsi_session *cs; 2656 2657 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2658 cs = PDU_SESSION(request); 2659 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2660 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2661 ISCSI_BHS_OPCODE_TASK_REQUEST, 2662 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2663 2664#if 0 2665 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2666 bhstmr->bhstmr_initiator_task_tag, 2667 bhstmr->bhstmr_referenced_task_tag); 2668#endif 2669 2670 if ((bhstmr->bhstmr_function & ~0x80) == 2671 BHSTMR_FUNCTION_ABORT_TASK) { 2672 /* 2673 * Make sure we no longer wait for Data-Out for this command. 2674 */ 2675 CFISCSI_SESSION_LOCK(cs); 2676 TAILQ_FOREACH_SAFE(cdw, 2677 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2678 if (bhstmr->bhstmr_referenced_task_tag != 2679 cdw->cdw_initiator_task_tag) 2680 continue; 2681 2682#if 0 2683 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2684 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2685#endif 2686 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2687 cdw, cdw_next); 2688 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2689 uma_zfree(cfiscsi_data_wait_zone, cdw); 2690 } 2691 CFISCSI_SESSION_UNLOCK(cs); 2692 } 2693 2694 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2695 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2696 response->ip_bhs; 2697 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2698 bhstmr2->bhstmr_flags = 0x80; 2699 if (io->io_hdr.status == CTL_SUCCESS) { 2700 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2701 } else { 2702 /* 2703 * XXX: How to figure out what exactly went wrong? iSCSI spec 2704 * expects us to provide detailed error, e.g. "Task does 2705 * not exist" or "LUN does not exist". 2706 */ 2707 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2708 bhstmr2->bhstmr_response = 2709 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2710 } 2711 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2712 2713 ctl_free_io(io); 2714 icl_pdu_free(request); 2715 cfiscsi_pdu_queue(response); 2716} 2717 2718static void 2719cfiscsi_done(union ctl_io *io) 2720{ 2721 struct icl_pdu *request; 2722 struct cfiscsi_session *cs; 2723 2724 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2725 ("invalid CTL status %#x", io->io_hdr.status)); 2726 2727 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2728 if (request == NULL) { 2729 /* 2730 * Implicit task termination has just completed; nothing to do. 2731 */ 2732 return; 2733 } 2734 2735 cs = PDU_SESSION(request); 2736 refcount_release(&cs->cs_outstanding_ctl_pdus); 2737 2738 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2739 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2740 cfiscsi_scsi_command_done(io); 2741 break; 2742 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2743 cfiscsi_task_management_done(io); 2744 break; 2745 default: 2746 panic("cfiscsi_done called with wrong opcode 0x%x", 2747 request->ip_bhs->bhs_opcode); 2748 } 2749} 2750