ctl_frontend_iscsi.c revision 256187
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 256187 2013-10-09 12:03:04Z 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 256187 2013-10-09 12:03:04Z 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, 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 off = 0; 736 for (;;) { 737 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 738 ("cdw->cdw_sg_index >= ctl_sg_count")); 739 if (cdw->cdw_sg_len == 0) { 740 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 741 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 742 } 743 copy_len = icl_pdu_data_segment_length(request) - off; 744 if (copy_len > cdw->cdw_sg_len) 745 copy_len = cdw->cdw_sg_len; 746 747 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 748 cdw->cdw_sg_addr += copy_len; 749 cdw->cdw_sg_len -= copy_len; 750 off += copy_len; 751 io->scsiio.ext_data_filled += copy_len; 752 753 if (cdw->cdw_sg_len == 0) { 754 if (cdw->cdw_sg_index == ctl_sg_count - 1) 755 break; 756 cdw->cdw_sg_index++; 757 } 758 if (off == icl_pdu_data_segment_length(request)) 759 break; 760 } 761 762 if (off < icl_pdu_data_segment_length(request)) { 763 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 764 "expected %zd", icl_pdu_data_segment_length(request), off); 765 cfiscsi_session_terminate(cs); 766 return (true); 767 } 768 769 if (bhsdo->bhsdo_flags & BHSDO_FLAGS_F || 770 io->scsiio.ext_data_filled == io->scsiio.kern_total_len) { 771 if ((bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 772 CFISCSI_SESSION_WARN(cs, "got the final packet without " 773 "the F flag; flags = 0x%x; dropping connection", 774 bhsdo->bhsdo_flags); 775 cfiscsi_session_terminate(cs); 776 return (true); 777 } 778 779 if (io->scsiio.ext_data_filled != io->scsiio.kern_total_len) { 780 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 781 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 782 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 783 "transmitted size was %zd bytes instead of %d; " 784 "dropping connection", 785 (size_t)io->scsiio.ext_data_filled, 786 io->scsiio.kern_total_len); 787 cfiscsi_session_terminate(cs); 788 return (true); 789 } else { 790 /* 791 * For SCSI Command PDU, this just means we need to 792 * solicit more data by sending R2T. 793 */ 794 return (false); 795 } 796 } 797#if 0 798 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 799 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 800#endif 801 802 return (true); 803 } 804 805 return (false); 806} 807 808static void 809cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 810{ 811 struct iscsi_bhs_data_out *bhsdo; 812 struct cfiscsi_session *cs; 813 struct cfiscsi_data_wait *cdw = NULL; 814 union ctl_io *io; 815 bool done; 816 817 cs = PDU_SESSION(request); 818 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 819 820 CFISCSI_SESSION_LOCK(cs); 821 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 822#if 0 823 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 824 "ttt 0x%x, itt 0x%x", 825 bhsdo->bhsdo_target_transfer_tag, 826 bhsdo->bhsdo_initiator_task_tag, 827 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 828#endif 829 if (bhsdo->bhsdo_target_transfer_tag == 830 cdw->cdw_target_transfer_tag) 831 break; 832 } 833 CFISCSI_SESSION_UNLOCK(cs); 834 if (cdw == NULL) { 835 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 836 "0x%x, not found", bhsdo->bhsdo_target_transfer_tag, 837 bhsdo->bhsdo_initiator_task_tag); 838 icl_pdu_free(request); 839 cfiscsi_session_terminate(cs); 840 return; 841 } 842 843 io = cdw->cdw_ctl_io; 844 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 845 ("CTL_FLAG_DATA_IN")); 846 847 done = cfiscsi_handle_data_segment(request, cdw); 848 if (done) { 849 CFISCSI_SESSION_LOCK(cs); 850 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 851 CFISCSI_SESSION_UNLOCK(cs); 852 uma_zfree(cfiscsi_data_wait_zone, cdw); 853 io->scsiio.be_move_done(io); 854 } 855 856 icl_pdu_free(request); 857} 858 859static void 860cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 861{ 862 struct iscsi_bhs_logout_request *bhslr; 863 struct iscsi_bhs_logout_response *bhslr2; 864 struct icl_pdu *response; 865 struct cfiscsi_session *cs; 866 867 cs = PDU_SESSION(request); 868 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 869 switch (bhslr->bhslr_reason & 0x7f) { 870 case BHSLR_REASON_CLOSE_SESSION: 871 case BHSLR_REASON_CLOSE_CONNECTION: 872 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 873 if (response == NULL) { 874 icl_pdu_free(request); 875 cfiscsi_session_terminate(cs); 876 return; 877 } 878 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 879 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 880 bhslr2->bhslr_flags = 0x80; 881 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 882 bhslr2->bhslr_initiator_task_tag = 883 bhslr->bhslr_initiator_task_tag; 884 icl_pdu_free(request); 885 cfiscsi_pdu_queue(response); 886 cfiscsi_session_terminate(cs); 887 break; 888 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 889 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 890 if (response == NULL) { 891 icl_pdu_free(request); 892 cfiscsi_session_terminate(cs); 893 return; 894 } 895 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 896 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 897 bhslr2->bhslr_flags = 0x80; 898 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 899 bhslr2->bhslr_initiator_task_tag = 900 bhslr->bhslr_initiator_task_tag; 901 icl_pdu_free(request); 902 cfiscsi_pdu_queue(response); 903 break; 904 default: 905 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 906 bhslr->bhslr_reason); 907 icl_pdu_free(request); 908 cfiscsi_session_terminate(cs); 909 break; 910 } 911} 912 913static void 914cfiscsi_callout(void *context) 915{ 916 struct icl_pdu *cp; 917 struct iscsi_bhs_nop_in *bhsni; 918 struct cfiscsi_session *cs; 919 920 cs = context; 921 922 if (cs->cs_terminating) 923 return; 924 925 callout_schedule(&cs->cs_callout, 1 * hz); 926 927 CFISCSI_SESSION_LOCK(cs); 928 cs->cs_timeout++; 929 CFISCSI_SESSION_UNLOCK(cs); 930 931#ifdef ICL_KERNEL_PROXY 932 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 933 if (cs->cs_timeout > login_timeout) { 934 CFISCSI_SESSION_WARN(cs, "login timed out after " 935 "%d seconds; dropping connection", cs->cs_timeout); 936 cfiscsi_session_terminate(cs); 937 } 938 return; 939 } 940#endif 941 942 if (cs->cs_timeout >= ping_timeout) { 943 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 944 "dropping connection", ping_timeout); 945 cfiscsi_session_terminate(cs); 946 return; 947 } 948 949 /* 950 * If the ping was reset less than one second ago - which means 951 * that we've received some PDU during the last second - assume 952 * the traffic flows correctly and don't bother sending a NOP-Out. 953 * 954 * (It's 2 - one for one second, and one for incrementing is_timeout 955 * earlier in this routine.) 956 */ 957 if (cs->cs_timeout < 2) 958 return; 959 960 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 961 if (cp == NULL) { 962 CFISCSI_SESSION_WARN(cs, "failed to allocate PDU"); 963 return; 964 } 965 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 966 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 967 bhsni->bhsni_flags = 0x80; 968 bhsni->bhsni_initiator_task_tag = 0xffffffff; 969 970 cfiscsi_pdu_queue(cp); 971} 972 973static void 974cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 975{ 976 struct cfiscsi_data_wait *cdw, *tmpcdw; 977 union ctl_io *io; 978 int error; 979 980#ifdef notyet 981 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 982 if (io == NULL) { 983 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 984 return; 985 } 986 ctl_zero_io(io); 987 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 988 io->io_hdr.io_type = CTL_IO_TASK; 989 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 990 io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port; 991 io->io_hdr.nexus.targ_target.id = 0; 992 io->io_hdr.nexus.targ_lun = lun; 993 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 994 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 995 error = ctl_queue(io); 996 if (error != CTL_RETVAL_COMPLETE) { 997 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 998 ctl_free_io(io); 999 } 1000#else 1001 /* 1002 * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead 1003 * just iterate over tasks that are waiting for something - data - and 1004 * terminate those. 1005 */ 1006 CFISCSI_SESSION_LOCK(cs); 1007 TAILQ_FOREACH_SAFE(cdw, 1008 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 1009 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref); 1010 if (io == NULL) { 1011 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1012 return; 1013 } 1014 ctl_zero_io(io); 1015 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL; 1016 io->io_hdr.io_type = CTL_IO_TASK; 1017 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1018 io->io_hdr.nexus.targ_port = 1019 cs->cs_target->ct_softc->fe.targ_port; 1020 io->io_hdr.nexus.targ_target.id = 0; 1021 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */ 1022 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1023 io->taskio.task_action = CTL_TASK_ABORT_TASK; 1024 io->taskio.tag_num = cdw->cdw_initiator_task_tag; 1025 error = ctl_queue(io); 1026 if (error != CTL_RETVAL_COMPLETE) { 1027 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1028 ctl_free_io(io); 1029 return; 1030 } 1031#if 0 1032 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag " 1033 "0x%x", cdw->cdw_initiator_task_tag); 1034#endif 1035 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1036 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1037 uma_zfree(cfiscsi_data_wait_zone, cdw); 1038 } 1039 CFISCSI_SESSION_UNLOCK(cs); 1040#endif 1041} 1042 1043static void 1044cfiscsi_maintenance_thread(void *arg) 1045{ 1046 struct cfiscsi_session *cs; 1047 1048 cs = arg; 1049 1050 for (;;) { 1051 CFISCSI_SESSION_LOCK(cs); 1052 if (cs->cs_terminating == false) 1053 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1054 CFISCSI_SESSION_UNLOCK(cs); 1055 1056 if (cs->cs_terminating) { 1057 cfiscsi_session_terminate_tasks(cs); 1058 callout_drain(&cs->cs_callout); 1059 1060 icl_conn_shutdown(cs->cs_conn); 1061 icl_conn_close(cs->cs_conn); 1062 1063 cs->cs_terminating++; 1064 1065 /* 1066 * XXX: We used to wait up to 30 seconds to deliver queued PDUs 1067 * to the initiator. We also tried hard to deliver SCSI Responses 1068 * for the aborted PDUs. We don't do that anymore. We might need 1069 * to revisit that. 1070 */ 1071 1072 cfiscsi_session_delete(cs); 1073 kthread_exit(); 1074 return; 1075 } 1076 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1077 } 1078} 1079 1080static void 1081cfiscsi_session_terminate(struct cfiscsi_session *cs) 1082{ 1083 1084 if (cs->cs_terminating != 0) 1085 return; 1086 cs->cs_terminating = 1; 1087 cv_signal(&cs->cs_maintenance_cv); 1088} 1089 1090static int 1091cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1092{ 1093 int error, i; 1094 struct cfiscsi_softc *softc; 1095 1096 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1097 1098 softc = &cfiscsi_softc; 1099 1100 mtx_lock(&softc->lock); 1101 for (i = 0; i < softc->max_initiators; i++) { 1102 if (softc->ctl_initids[i] == 0) 1103 break; 1104 } 1105 if (i == softc->max_initiators) { 1106 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1107 softc->max_initiators); 1108 mtx_unlock(&softc->lock); 1109 return (1); 1110 } 1111 softc->ctl_initids[i] = 1; 1112 mtx_unlock(&softc->lock); 1113 1114#if 0 1115 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1116 i, softc->max_initiators); 1117#endif 1118 cs->cs_ctl_initid = i; 1119 error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid); 1120 if (error != 0) { 1121 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1122 mtx_lock(&softc->lock); 1123 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1124 mtx_unlock(&softc->lock); 1125 cs->cs_ctl_initid = -1; 1126 return (1); 1127 } 1128 1129 return (0); 1130} 1131 1132static void 1133cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1134{ 1135 int error; 1136 struct cfiscsi_softc *softc; 1137 1138 if (cs->cs_ctl_initid == -1) 1139 return; 1140 1141 softc = &cfiscsi_softc; 1142 1143 error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid); 1144 if (error != 0) { 1145 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1146 error); 1147 } 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} 1153 1154static struct cfiscsi_session * 1155cfiscsi_session_new(struct cfiscsi_softc *softc) 1156{ 1157 struct cfiscsi_session *cs; 1158 int error; 1159 1160 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1161 if (cs == NULL) { 1162 CFISCSI_WARN("malloc failed"); 1163 return (NULL); 1164 } 1165 cs->cs_ctl_initid = -1; 1166 1167 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1168 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1169 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1170 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1171#ifdef ICL_KERNEL_PROXY 1172 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1173#endif 1174 1175 cs->cs_conn = icl_conn_new(); 1176 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1177 cs->cs_conn->ic_error = cfiscsi_error_callback; 1178 cs->cs_conn->ic_prv0 = cs; 1179 1180 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1181 if (error != 0) { 1182 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1183 free(cs, M_CFISCSI); 1184 return (NULL); 1185 } 1186 1187 mtx_lock(&softc->lock); 1188 cs->cs_id = softc->last_session_id + 1; 1189 softc->last_session_id++; 1190 mtx_unlock(&softc->lock); 1191 1192 mtx_lock(&softc->lock); 1193 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1194 mtx_unlock(&softc->lock); 1195 1196 /* 1197 * Start pinging the initiator. 1198 */ 1199 callout_init(&cs->cs_callout, 1); 1200 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1201 1202 return (cs); 1203} 1204 1205static void 1206cfiscsi_session_delete(struct cfiscsi_session *cs) 1207{ 1208 struct cfiscsi_softc *softc; 1209 1210 softc = &cfiscsi_softc; 1211 1212 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1213 ("destroying session with outstanding CTL pdus")); 1214 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1215 ("destroying session with non-empty queue")); 1216 1217 cfiscsi_session_unregister_initiator(cs); 1218 if (cs->cs_target != NULL) 1219 cfiscsi_target_release(cs->cs_target); 1220 icl_conn_close(cs->cs_conn); 1221 icl_conn_free(cs->cs_conn); 1222 1223 mtx_lock(&softc->lock); 1224 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1225 mtx_unlock(&softc->lock); 1226 1227 free(cs, M_CFISCSI); 1228} 1229 1230int 1231cfiscsi_init(void) 1232{ 1233 struct cfiscsi_softc *softc; 1234 struct ctl_frontend *fe; 1235 int retval; 1236 1237 softc = &cfiscsi_softc; 1238 retval = 0; 1239 bzero(softc, sizeof(*softc)); 1240 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1241 1242#ifdef ICL_KERNEL_PROXY 1243 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1244#endif 1245 TAILQ_INIT(&softc->sessions); 1246 TAILQ_INIT(&softc->targets); 1247 1248 fe = &softc->fe; 1249 fe->port_type = CTL_PORT_ISCSI; 1250 /* XXX KDM what should the real number be here? */ 1251 fe->num_requested_ctl_io = 4096; 1252 snprintf(softc->port_name, sizeof(softc->port_name), "iscsi"); 1253 fe->port_name = softc->port_name; 1254 fe->port_online = cfiscsi_online; 1255 fe->port_offline = cfiscsi_offline; 1256 fe->onoff_arg = softc; 1257 fe->targ_enable = cfiscsi_targ_enable; 1258 fe->targ_disable = cfiscsi_targ_disable; 1259 fe->lun_enable = cfiscsi_lun_enable; 1260 fe->lun_disable = cfiscsi_lun_disable; 1261 fe->targ_lun_arg = softc; 1262 fe->ioctl = cfiscsi_ioctl; 1263 fe->devid = cfiscsi_devid; 1264 fe->fe_datamove = cfiscsi_datamove; 1265 fe->fe_done = cfiscsi_done; 1266 1267 /* XXX KDM what should we report here? */ 1268 /* XXX These should probably be fetched from CTL. */ 1269 fe->max_targets = 1; 1270 fe->max_target_id = 15; 1271 1272 retval = ctl_frontend_register(fe, /*master_SC*/ 1); 1273 if (retval != 0) { 1274 CFISCSI_WARN("ctl_frontend_register() failed with error %d", 1275 retval); 1276 retval = 1; 1277 goto bailout; 1278 } 1279 1280 softc->max_initiators = fe->max_initiators; 1281 1282 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1283 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1284 UMA_ALIGN_PTR, 0); 1285 1286 return (0); 1287 1288bailout: 1289 return (retval); 1290} 1291 1292static int 1293cfiscsi_module_event_handler(module_t mod, int what, void *arg) 1294{ 1295 1296 switch (what) { 1297 case MOD_LOAD: 1298 return (cfiscsi_init()); 1299 case MOD_UNLOAD: 1300 return (EBUSY); 1301 default: 1302 return (EOPNOTSUPP); 1303 } 1304} 1305 1306#ifdef ICL_KERNEL_PROXY 1307static void 1308cfiscsi_accept(struct socket *so) 1309{ 1310 struct cfiscsi_session *cs; 1311 1312 cs = cfiscsi_session_new(&cfiscsi_softc); 1313 if (cs == NULL) { 1314 CFISCSI_WARN("failed to create session"); 1315 return; 1316 } 1317 1318 icl_conn_handoff_sock(cs->cs_conn, so); 1319 cs->cs_waiting_for_ctld = true; 1320 cv_signal(&cfiscsi_softc.accept_cv); 1321} 1322#endif 1323 1324static void 1325cfiscsi_online(void *arg) 1326{ 1327 struct cfiscsi_softc *softc; 1328 1329 softc = (struct cfiscsi_softc *)arg; 1330 1331 softc->online = 1; 1332#ifdef ICL_KERNEL_PROXY 1333 if (softc->listener != NULL) 1334 icl_listen_free(softc->listener); 1335 softc->listener = icl_listen_new(cfiscsi_accept); 1336#endif 1337} 1338 1339static void 1340cfiscsi_offline(void *arg) 1341{ 1342 struct cfiscsi_softc *softc; 1343 struct cfiscsi_session *cs; 1344 1345 softc = (struct cfiscsi_softc *)arg; 1346 1347 softc->online = 0; 1348 1349 mtx_lock(&softc->lock); 1350 TAILQ_FOREACH(cs, &softc->sessions, cs_next) 1351 cfiscsi_session_terminate(cs); 1352 mtx_unlock(&softc->lock); 1353 1354#ifdef ICL_KERNEL_PROXY 1355 icl_listen_free(softc->listener); 1356 softc->listener = NULL; 1357#endif 1358} 1359 1360static int 1361cfiscsi_targ_enable(void *arg, struct ctl_id targ_id) 1362{ 1363 1364 return (0); 1365} 1366 1367static int 1368cfiscsi_targ_disable(void *arg, struct ctl_id targ_id) 1369{ 1370 1371 return (0); 1372} 1373 1374static void 1375cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1376{ 1377 struct cfiscsi_softc *softc; 1378 struct cfiscsi_session *cs; 1379 struct cfiscsi_target *ct; 1380 struct ctl_iscsi_handoff_params *cihp; 1381#ifndef ICL_KERNEL_PROXY 1382 int error; 1383#endif 1384 1385 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1386 softc = &cfiscsi_softc; 1387 1388 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1389 cihp->initiator_name, cihp->initiator_addr, 1390 cihp->target_name); 1391 1392 if (softc->online == 0) { 1393 ci->status = CTL_ISCSI_ERROR; 1394 snprintf(ci->error_str, sizeof(ci->error_str), 1395 "%s: port offline", __func__); 1396 return; 1397 } 1398 1399 ct = cfiscsi_target_find(softc, cihp->target_name); 1400 if (ct == NULL) { 1401 ci->status = CTL_ISCSI_ERROR; 1402 snprintf(ci->error_str, sizeof(ci->error_str), 1403 "%s: target not found", __func__); 1404 return; 1405 } 1406 1407#ifdef ICL_KERNEL_PROXY 1408 mtx_lock(&cfiscsi_softc.lock); 1409 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1410 if (cs->cs_id == cihp->socket) 1411 break; 1412 } 1413 if (cs == NULL) { 1414 mtx_unlock(&cfiscsi_softc.lock); 1415 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1416 ci->status = CTL_ISCSI_ERROR; 1417 return; 1418 } 1419 mtx_unlock(&cfiscsi_softc.lock); 1420#else 1421 cs = cfiscsi_session_new(softc); 1422 if (cs == NULL) { 1423 ci->status = CTL_ISCSI_ERROR; 1424 snprintf(ci->error_str, sizeof(ci->error_str), 1425 "%s: cfiscsi_session_new failed", __func__); 1426 cfiscsi_target_release(ct); 1427 return; 1428 } 1429#endif 1430 cs->cs_target = ct; 1431 1432 /* 1433 * First PDU of Full Feature phase has the same CmdSN as the last 1434 * PDU from the Login Phase received from the initiator. Thus, 1435 * the -1 below. 1436 */ 1437 cs->cs_portal_group_tag = cihp->portal_group_tag; 1438 cs->cs_cmdsn = cihp->cmdsn; 1439 cs->cs_statsn = cihp->statsn; 1440 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1441 cs->cs_max_burst_length = cihp->max_burst_length; 1442 cs->cs_immediate_data = !!cihp->immediate_data; 1443 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1444 cs->cs_conn->ic_header_crc32c = true; 1445 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1446 cs->cs_conn->ic_data_crc32c = true; 1447 1448 strlcpy(cs->cs_initiator_name, 1449 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1450 strlcpy(cs->cs_initiator_addr, 1451 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1452 strlcpy(cs->cs_initiator_alias, 1453 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1454 1455#ifdef ICL_KERNEL_PROXY 1456 cs->cs_login_phase = false; 1457#else 1458 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1459 if (error != 0) { 1460 cfiscsi_session_delete(cs); 1461 ci->status = CTL_ISCSI_ERROR; 1462 snprintf(ci->error_str, sizeof(ci->error_str), 1463 "%s: icl_conn_handoff failed with error %d", 1464 __func__, error); 1465 return; 1466 } 1467#endif 1468 1469 /* 1470 * Register initiator with CTL. 1471 */ 1472 cfiscsi_session_register_initiator(cs); 1473 1474#ifdef ICL_KERNEL_PROXY 1475 /* 1476 * First PDU of the Full Feature phase has likely already arrived. 1477 * We have to pick it up and execute properly. 1478 */ 1479 if (cs->cs_login_pdu != NULL) { 1480 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1481 cfiscsi_pdu_handle(cs->cs_login_pdu); 1482 cs->cs_login_pdu = NULL; 1483 } 1484#endif 1485 1486 ci->status = CTL_ISCSI_OK; 1487} 1488 1489static void 1490cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1491{ 1492 struct ctl_iscsi_list_params *cilp; 1493 struct cfiscsi_session *cs; 1494 struct cfiscsi_softc *softc; 1495 struct sbuf *sb; 1496 int error; 1497 1498 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1499 softc = &cfiscsi_softc; 1500 1501 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1502 if (sb == NULL) { 1503 ci->status = CTL_ISCSI_ERROR; 1504 snprintf(ci->error_str, sizeof(ci->error_str), 1505 "Unable to allocate %d bytes for iSCSI session list", 1506 cilp->alloc_len); 1507 return; 1508 } 1509 1510 sbuf_printf(sb, "<ctlislist>\n"); 1511 mtx_lock(&softc->lock); 1512 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1513#ifdef ICL_KERNEL_PROXY 1514 if (cs->cs_target == NULL) 1515 continue; 1516#endif 1517 error = sbuf_printf(sb, "<connection id=\"%d\">" 1518 "<initiator>%s</initiator>" 1519 "<initiator_addr>%s</initiator_addr>" 1520 "<initiator_alias>%s</initiator_alias>" 1521 "<target>%s</target>" 1522 "<target_alias>%s</target_alias>" 1523 "<header_digest>%s</header_digest>" 1524 "<data_digest>%s</data_digest>" 1525 "<max_data_segment_length>%zd</max_data_segment_length>" 1526 "<immediate_data>%d</immediate_data>" 1527 "<iser>%d</iser>" 1528 "</connection>\n", 1529 cs->cs_id, 1530 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1531 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1532 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1533 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1534 cs->cs_max_data_segment_length, 1535 cs->cs_immediate_data, 1536 cs->cs_conn->ic_iser); 1537 if (error != 0) 1538 break; 1539 } 1540 mtx_unlock(&softc->lock); 1541 error = sbuf_printf(sb, "</ctlislist>\n"); 1542 if (error != 0) { 1543 sbuf_delete(sb); 1544 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1545 snprintf(ci->error_str, sizeof(ci->error_str), 1546 "Out of space, %d bytes is too small", cilp->alloc_len); 1547 return; 1548 } 1549 sbuf_finish(sb); 1550 1551 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1552 cilp->fill_len = sbuf_len(sb) + 1; 1553 ci->status = CTL_ISCSI_OK; 1554 sbuf_delete(sb); 1555} 1556 1557static void 1558cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1559{ 1560 struct icl_pdu *response; 1561 struct iscsi_bhs_asynchronous_message *bhsam; 1562 struct ctl_iscsi_terminate_params *citp; 1563 struct cfiscsi_session *cs; 1564 struct cfiscsi_softc *softc; 1565 int found = 0; 1566 1567 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1568 softc = &cfiscsi_softc; 1569 1570 mtx_lock(&softc->lock); 1571 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1572 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1573 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1574 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1575 continue; 1576 1577 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1578 if (response == NULL) { 1579 /* 1580 * Oh well. Just terminate the connection. 1581 */ 1582 } else { 1583 bhsam = (struct iscsi_bhs_asynchronous_message *) 1584 response->ip_bhs; 1585 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1586 bhsam->bhsam_flags = 0x80; 1587 bhsam->bhsam_0xffffffff = 0xffffffff; 1588 bhsam->bhsam_async_event = 1589 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1590 cfiscsi_pdu_queue(response); 1591 } 1592 cfiscsi_session_terminate(cs); 1593 found++; 1594 } 1595 mtx_unlock(&softc->lock); 1596 1597 if (found == 0) { 1598 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1599 snprintf(ci->error_str, sizeof(ci->error_str), 1600 "No matching connections found"); 1601 return; 1602 } 1603 1604 ci->status = CTL_ISCSI_OK; 1605} 1606 1607static void 1608cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1609{ 1610 struct icl_pdu *response; 1611 struct iscsi_bhs_asynchronous_message *bhsam; 1612 struct ctl_iscsi_logout_params *cilp; 1613 struct cfiscsi_session *cs; 1614 struct cfiscsi_softc *softc; 1615 int found = 0; 1616 1617 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1618 softc = &cfiscsi_softc; 1619 1620 mtx_lock(&softc->lock); 1621 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1622 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1623 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1624 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1625 continue; 1626 1627 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1628 if (response == NULL) { 1629 ci->status = CTL_ISCSI_ERROR; 1630 snprintf(ci->error_str, sizeof(ci->error_str), 1631 "Unable to allocate memory"); 1632 mtx_unlock(&softc->lock); 1633 return; 1634 } 1635 bhsam = 1636 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1637 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1638 bhsam->bhsam_flags = 0x80; 1639 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1640 bhsam->bhsam_parameter3 = htons(10); 1641 cfiscsi_pdu_queue(response); 1642 found++; 1643 } 1644 mtx_unlock(&softc->lock); 1645 1646 if (found == 0) { 1647 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1648 snprintf(ci->error_str, sizeof(ci->error_str), 1649 "No matching connections found"); 1650 return; 1651 } 1652 1653 ci->status = CTL_ISCSI_OK; 1654} 1655 1656#ifdef ICL_KERNEL_PROXY 1657static void 1658cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1659{ 1660 struct ctl_iscsi_listen_params *cilp; 1661 struct sockaddr *sa; 1662 int error; 1663 1664 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1665 1666 if (cfiscsi_softc.listener == NULL) { 1667 CFISCSI_DEBUG("no listener"); 1668 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1669 ci->status = CTL_ISCSI_ERROR; 1670 return; 1671 } 1672 1673 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1674 if (error != 0) { 1675 CFISCSI_DEBUG("getsockaddr, error %d", error); 1676 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1677 ci->status = CTL_ISCSI_ERROR; 1678 return; 1679 } 1680 1681 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1682 cilp->socktype, cilp->protocol, sa); 1683 if (error != 0) { 1684 free(sa, M_SONAME); 1685 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1686 snprintf(ci->error_str, sizeof(ci->error_str), 1687 "icl_listen_add failed, error %d", error); 1688 ci->status = CTL_ISCSI_ERROR; 1689 return; 1690 } 1691 1692 ci->status = CTL_ISCSI_OK; 1693} 1694 1695static void 1696cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1697{ 1698 struct ctl_iscsi_accept_params *ciap; 1699 struct cfiscsi_session *cs; 1700 int error; 1701 1702 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1703 1704 mtx_lock(&cfiscsi_softc.lock); 1705 for (;;) { 1706 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1707 if (cs->cs_waiting_for_ctld) 1708 break; 1709 } 1710 if (cs != NULL) 1711 break; 1712 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1713 if (error != 0) { 1714 mtx_unlock(&cfiscsi_softc.lock); 1715 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1716 ci->status = CTL_ISCSI_ERROR; 1717 return; 1718 } 1719 } 1720 mtx_unlock(&cfiscsi_softc.lock); 1721 1722 cs->cs_waiting_for_ctld = false; 1723 cs->cs_login_phase = true; 1724 1725 ciap->connection_id = cs->cs_id; 1726 ci->status = CTL_ISCSI_OK; 1727} 1728 1729static void 1730cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1731{ 1732 struct ctl_iscsi_send_params *cisp; 1733 struct cfiscsi_session *cs; 1734 struct icl_pdu *ip; 1735 size_t datalen; 1736 void *data; 1737 int error; 1738 1739 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1740 1741 mtx_lock(&cfiscsi_softc.lock); 1742 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1743 if (cs->cs_id == cisp->connection_id) 1744 break; 1745 } 1746 if (cs == NULL) { 1747 mtx_unlock(&cfiscsi_softc.lock); 1748 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1749 ci->status = CTL_ISCSI_ERROR; 1750 return; 1751 } 1752 mtx_unlock(&cfiscsi_softc.lock); 1753 1754#if 0 1755 if (cs->cs_login_phase == false) 1756 return (EBUSY); 1757#endif 1758 1759 if (cs->cs_terminating) { 1760 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1761 ci->status = CTL_ISCSI_ERROR; 1762 return; 1763 } 1764 1765 datalen = cisp->data_segment_len; 1766 /* 1767 * XXX 1768 */ 1769 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1770 if (datalen > 65535) { 1771 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1772 ci->status = CTL_ISCSI_ERROR; 1773 return; 1774 } 1775 if (datalen > 0) { 1776 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1777 error = copyin(cisp->data_segment, data, datalen); 1778 if (error != 0) { 1779 free(data, M_CFISCSI); 1780 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1781 ci->status = CTL_ISCSI_ERROR; 1782 return; 1783 } 1784 } 1785 1786 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1787 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1788 if (datalen > 0) { 1789 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1790 free(data, M_CFISCSI); 1791 } 1792 icl_pdu_queue(ip); 1793 ci->status = CTL_ISCSI_OK; 1794} 1795 1796static void 1797cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1798{ 1799 struct ctl_iscsi_receive_params *cirp; 1800 struct cfiscsi_session *cs; 1801 struct icl_pdu *ip; 1802 void *data; 1803 1804 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1805 1806 mtx_lock(&cfiscsi_softc.lock); 1807 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1808 if (cs->cs_id == cirp->connection_id) 1809 break; 1810 } 1811 if (cs == NULL) { 1812 mtx_unlock(&cfiscsi_softc.lock); 1813 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1814 ci->status = CTL_ISCSI_ERROR; 1815 return; 1816 } 1817 mtx_unlock(&cfiscsi_softc.lock); 1818 1819#if 0 1820 if (is->is_login_phase == false) 1821 return (EBUSY); 1822#endif 1823 1824 CFISCSI_SESSION_LOCK(cs); 1825 while (cs->cs_login_pdu == NULL && 1826 cs->cs_terminating == false) 1827 cv_wait(&cs->cs_login_cv, &cs->cs_lock); 1828 if (cs->cs_terminating) { 1829 CFISCSI_SESSION_UNLOCK(cs); 1830 snprintf(ci->error_str, sizeof(ci->error_str), "connection terminating"); 1831 ci->status = CTL_ISCSI_ERROR; 1832 return; 1833 } 1834 ip = cs->cs_login_pdu; 1835 cs->cs_login_pdu = NULL; 1836 CFISCSI_SESSION_UNLOCK(cs); 1837 1838 if (ip->ip_data_len > cirp->data_segment_len) { 1839 icl_pdu_free(ip); 1840 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1841 ci->status = CTL_ISCSI_ERROR; 1842 return; 1843 } 1844 1845 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1846 if (ip->ip_data_len > 0) { 1847 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1848 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1849 copyout(data, cirp->data_segment, ip->ip_data_len); 1850 free(data, M_CFISCSI); 1851 } 1852 1853 icl_pdu_free(ip); 1854 ci->status = CTL_ISCSI_OK; 1855} 1856 1857static void 1858cfiscsi_ioctl_close(struct ctl_iscsi *ci) 1859{ 1860 /* 1861 * XXX 1862 */ 1863} 1864#endif /* !ICL_KERNEL_PROXY */ 1865 1866static int 1867cfiscsi_ioctl(struct cdev *dev, 1868 u_long cmd, caddr_t addr, int flag, struct thread *td) 1869{ 1870 struct ctl_iscsi *ci; 1871 1872 if (cmd != CTL_ISCSI) 1873 return (ENOTTY); 1874 1875 ci = (struct ctl_iscsi *)addr; 1876 switch (ci->type) { 1877 case CTL_ISCSI_HANDOFF: 1878 cfiscsi_ioctl_handoff(ci); 1879 break; 1880 case CTL_ISCSI_LIST: 1881 cfiscsi_ioctl_list(ci); 1882 break; 1883 case CTL_ISCSI_TERMINATE: 1884 cfiscsi_ioctl_terminate(ci); 1885 break; 1886 case CTL_ISCSI_LOGOUT: 1887 cfiscsi_ioctl_logout(ci); 1888 break; 1889#ifdef ICL_KERNEL_PROXY 1890 case CTL_ISCSI_LISTEN: 1891 cfiscsi_ioctl_listen(ci); 1892 break; 1893 case CTL_ISCSI_ACCEPT: 1894 cfiscsi_ioctl_accept(ci); 1895 break; 1896 case CTL_ISCSI_SEND: 1897 cfiscsi_ioctl_send(ci); 1898 break; 1899 case CTL_ISCSI_RECEIVE: 1900 cfiscsi_ioctl_receive(ci); 1901 break; 1902 case CTL_ISCSI_CLOSE: 1903 cfiscsi_ioctl_close(ci); 1904 break; 1905#endif /* ICL_KERNEL_PROXY */ 1906 default: 1907 ci->status = CTL_ISCSI_ERROR; 1908 snprintf(ci->error_str, sizeof(ci->error_str), 1909 "%s: invalid iSCSI request type %d", __func__, ci->type); 1910 break; 1911 } 1912 1913 return (0); 1914} 1915 1916static int 1917cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len) 1918{ 1919 struct cfiscsi_session *cs; 1920 struct scsi_vpd_device_id *devid_ptr; 1921 struct scsi_vpd_id_descriptor *desc, *desc1; 1922 struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */ 1923 struct scsi_vpd_id_t10 *t10id; 1924 struct ctl_lun *lun; 1925 const struct icl_pdu *request; 1926 size_t devid_len, wwpn_len; 1927 1928 lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr; 1929 request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 1930 cs = PDU_SESSION(request); 1931 1932 wwpn_len = strlen(cs->cs_target->ct_name); 1933 wwpn_len += strlen(",t,0x01"); 1934 wwpn_len += 1; /* '\0' */ 1935 if ((wwpn_len % 4) != 0) 1936 wwpn_len += (4 - (wwpn_len % 4)); 1937 1938 devid_len = sizeof(struct scsi_vpd_device_id) + 1939 sizeof(struct scsi_vpd_id_descriptor) + 1940 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN + 1941 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len + 1942 sizeof(struct scsi_vpd_id_descriptor) + 1943 sizeof(struct scsi_vpd_id_rel_trgt_port_id) + 1944 sizeof(struct scsi_vpd_id_descriptor) + 1945 sizeof(struct scsi_vpd_id_trgt_port_grp_id); 1946 1947 ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO); 1948 devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr; 1949 ctsio->kern_sg_entries = 0; 1950 1951 if (devid_len < alloc_len) { 1952 ctsio->residual = alloc_len - devid_len; 1953 ctsio->kern_data_len = devid_len; 1954 ctsio->kern_total_len = devid_len; 1955 } else { 1956 ctsio->residual = 0; 1957 ctsio->kern_data_len = alloc_len; 1958 ctsio->kern_total_len = alloc_len; 1959 } 1960 ctsio->kern_data_resid = 0; 1961 ctsio->kern_rel_offset = 0; 1962 ctsio->kern_sg_entries = 0; 1963 1964 desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list; 1965 t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0]; 1966 desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] + 1967 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN); 1968 desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] + 1969 wwpn_len); 1970 desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] + 1971 sizeof(struct scsi_vpd_id_rel_trgt_port_id)); 1972 1973 if (lun != NULL) 1974 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) | 1975 lun->be_lun->lun_type; 1976 else 1977 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT; 1978 1979 devid_ptr->page_code = SVPD_DEVICE_ID; 1980 1981 scsi_ulto2b(devid_len - 4, devid_ptr->length); 1982 1983 /* 1984 * We're using a LUN association here. i.e., this device ID is a 1985 * per-LUN identifier. 1986 */ 1987 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII; 1988 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10; 1989 desc->length = sizeof(*t10id) + CTL_DEVID_LEN; 1990 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor)); 1991 1992 /* 1993 * If we've actually got a backend, copy the device id from the 1994 * per-LUN data. Otherwise, set it to all spaces. 1995 */ 1996 if (lun != NULL) { 1997 /* 1998 * Copy the backend's LUN ID. 1999 */ 2000 strncpy((char *)t10id->vendor_spec_id, 2001 (char *)lun->be_lun->device_id, CTL_DEVID_LEN); 2002 } else { 2003 /* 2004 * No backend, set this to spaces. 2005 */ 2006 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN); 2007 } 2008 2009 /* 2010 * desc1 is for the WWPN which is a port asscociation. 2011 */ 2012 desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2013 desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2014 SVPD_ID_TYPE_SCSI_NAME; 2015 desc1->length = wwpn_len; 2016 snprintf(desc1->identifier, wwpn_len, "%s,t,0x%x", 2017 cs->cs_target->ct_name, cs->cs_portal_group_tag); 2018 2019 /* 2020 * desc2 is for the Relative Target Port(type 4h) identifier 2021 */ 2022 desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2023 desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2024 SVPD_ID_TYPE_RELTARG; 2025 desc2->length = 4; 2026 desc2->identifier[3] = 1; 2027 2028 /* 2029 * desc3 is for the Target Port Group(type 5h) identifier 2030 */ 2031 desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY; 2032 desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2033 SVPD_ID_TYPE_TPORTGRP; 2034 desc3->length = 4; 2035 desc3->identifier[3] = 1; 2036 2037 ctsio->scsi_status = SCSI_STATUS_OK; 2038 2039 ctsio->be_move_done = ctl_config_move_done; 2040 ctl_datamove((union ctl_io *)ctsio); 2041 2042 return (CTL_RETVAL_COMPLETE); 2043} 2044 2045static void 2046cfiscsi_target_hold(struct cfiscsi_target *ct) 2047{ 2048 2049 refcount_acquire(&ct->ct_refcount); 2050} 2051 2052static void 2053cfiscsi_target_release(struct cfiscsi_target *ct) 2054{ 2055 int old; 2056 struct cfiscsi_softc *softc; 2057 2058 softc = ct->ct_softc; 2059 2060 old = ct->ct_refcount; 2061 if (old > 1 && atomic_cmpset_int(&ct->ct_refcount, old, old - 1)) 2062 return; 2063 2064 mtx_lock(&softc->lock); 2065 if (refcount_release(&ct->ct_refcount)) { 2066 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2067 mtx_unlock(&softc->lock); 2068 free(ct, M_CFISCSI); 2069 2070 return; 2071 } 2072 mtx_unlock(&softc->lock); 2073} 2074 2075static struct cfiscsi_target * 2076cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2077{ 2078 struct cfiscsi_target *ct; 2079 2080 mtx_lock(&softc->lock); 2081 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2082 if (strcmp(name, ct->ct_name) != 0) 2083 continue; 2084 cfiscsi_target_hold(ct); 2085 mtx_unlock(&softc->lock); 2086 return (ct); 2087 } 2088 mtx_unlock(&softc->lock); 2089 2090 return (NULL); 2091} 2092 2093static struct cfiscsi_target * 2094cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2095 const char *alias) 2096{ 2097 struct cfiscsi_target *ct, *newct; 2098 int i; 2099 2100 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2101 return (NULL); 2102 2103 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2104 2105 mtx_lock(&softc->lock); 2106 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2107 if (strcmp(name, ct->ct_name) != 0) 2108 continue; 2109 cfiscsi_target_hold(ct); 2110 mtx_unlock(&softc->lock); 2111 free(newct, M_CFISCSI); 2112 return (ct); 2113 } 2114 2115 for (i = 0; i < CTL_MAX_LUNS; i++) 2116 newct->ct_luns[i] = -1; 2117 2118 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2119 if (alias != NULL) 2120 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2121 refcount_init(&newct->ct_refcount, 1); 2122 newct->ct_softc = softc; 2123 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2124 mtx_unlock(&softc->lock); 2125 2126 return (newct); 2127} 2128 2129/* 2130 * Takes LUN from the target space and returns LUN from the CTL space. 2131 */ 2132static uint32_t 2133cfiscsi_map_lun(void *arg, uint32_t lun) 2134{ 2135 struct cfiscsi_session *cs; 2136 2137 cs = arg; 2138 2139 if (lun >= CTL_MAX_LUNS) { 2140 CFISCSI_DEBUG("requested lun number %d is higher " 2141 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2142 return (0xffffffff); 2143 } 2144 2145 if (cs->cs_target->ct_luns[lun] < 0) 2146 return (0xffffffff); 2147 2148 return (cs->cs_target->ct_luns[lun]); 2149} 2150 2151static int 2152cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2153 unsigned long lun_id, unsigned long ctl_lun_id) 2154{ 2155 2156 if (lun_id >= CTL_MAX_LUNS) { 2157 CFISCSI_WARN("requested lun number %ld is higher " 2158 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2159 return (-1); 2160 } 2161 2162 if (ct->ct_luns[lun_id] >= 0) { 2163 /* 2164 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2165 * when the LUN is created, and a second time just before 2166 * the port is brought online; don't emit warnings 2167 * for that case. 2168 */ 2169 if (ct->ct_luns[lun_id] == ctl_lun_id) 2170 return (0); 2171 CFISCSI_WARN("lun %ld already allocated", lun_id); 2172 return (-1); 2173 } 2174 2175#if 0 2176 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2177 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2178#endif 2179 2180 ct->ct_luns[lun_id] = ctl_lun_id; 2181 cfiscsi_target_hold(ct); 2182 2183 return (0); 2184} 2185 2186static int 2187cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id) 2188{ 2189 2190 if (ct->ct_luns[lun_id] < 0) { 2191 CFISCSI_WARN("lun %ld not allocated", lun_id); 2192 return (-1); 2193 } 2194 2195 ct->ct_luns[lun_id] = -1; 2196 cfiscsi_target_release(ct); 2197 2198 return (0); 2199} 2200 2201static int 2202cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2203{ 2204 struct cfiscsi_softc *softc; 2205 struct cfiscsi_target *ct; 2206 struct ctl_be_lun_option *opt; 2207 const char *target = NULL, *target_alias = NULL; 2208 const char *lun = NULL; 2209 unsigned long tmp; 2210 2211 softc = (struct cfiscsi_softc *)arg; 2212 2213 STAILQ_FOREACH(opt, 2214 &control_softc->ctl_luns[lun_id]->be_lun->options, links) { 2215 if (strcmp(opt->name, "cfiscsi_target") == 0) 2216 target = opt->value; 2217 else if (strcmp(opt->name, "cfiscsi_target_alias") == 0) 2218 target_alias = opt->value; 2219 else if (strcmp(opt->name, "cfiscsi_lun") == 0) 2220 lun = opt->value; 2221 } 2222 2223 if (target == NULL && lun == NULL) 2224 return (0); 2225 2226 if (target == NULL || lun == NULL) { 2227 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2228 "cfiscsi_lun, or the other way around; ignoring"); 2229 return (0); 2230 } 2231 2232 ct = cfiscsi_target_find_or_create(softc, target, target_alias); 2233 if (ct == NULL) { 2234 CFISCSI_WARN("failed to create target \"%s\"", target); 2235 return (0); 2236 } 2237 2238 tmp = strtoul(lun, NULL, 10); 2239 cfiscsi_target_set_lun(ct, tmp, lun_id); 2240 return (0); 2241} 2242 2243static int 2244cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2245{ 2246 struct cfiscsi_softc *softc; 2247 struct cfiscsi_target *ct; 2248 int i; 2249 2250 softc = (struct cfiscsi_softc *)arg; 2251 2252 mtx_lock(&softc->lock); 2253 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2254 for (i = 0; i < CTL_MAX_LUNS; i++) { 2255 if (ct->ct_luns[i] < 0) 2256 continue; 2257 if (ct->ct_luns[i] != lun_id) 2258 continue; 2259 cfiscsi_target_unset_lun(ct, i); 2260 break; 2261 } 2262 } 2263 mtx_unlock(&softc->lock); 2264 return (0); 2265} 2266 2267static void 2268cfiscsi_datamove_in(union ctl_io *io) 2269{ 2270 struct cfiscsi_session *cs; 2271 struct icl_pdu *request, *response; 2272 const struct iscsi_bhs_scsi_command *bhssc; 2273 struct iscsi_bhs_data_in *bhsdi; 2274 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2275 size_t copy_len, len, off; 2276 const char *addr; 2277 int ctl_sg_count, error, i; 2278 2279 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2280 cs = PDU_SESSION(request); 2281 2282 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2283 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2284 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2285 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2286 2287 if (io->scsiio.kern_sg_entries > 0) { 2288 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2289 ctl_sg_count = io->scsiio.kern_sg_entries; 2290 } else { 2291 ctl_sglist = &ctl_sg_entry; 2292 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2293 ctl_sglist->len = io->scsiio.kern_data_len; 2294 ctl_sg_count = 1; 2295 } 2296 2297 /* 2298 * We need to record it so that we can properly report 2299 * underflow/underflow. 2300 */ 2301 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2302 2303#if 0 2304 if (ctl_sg_count > 1) 2305 CFISCSI_SESSION_DEBUG(cs, "ctl_sg_count = %d", ctl_sg_count); 2306#endif 2307 2308 /* 2309 * This is the offset within the current SCSI command; 2310 * i.e. for the first call of datamove(), it will be 0, 2311 * and for subsequent ones it will be the sum of lengths 2312 * of previous ones. 2313 */ 2314 off = htonl(io->scsiio.kern_rel_offset); 2315 if (off > 1) 2316 CFISCSI_SESSION_DEBUG(cs, "off = %zd", off); 2317 2318 i = 0; 2319 addr = NULL; 2320 len = 0; 2321 response = NULL; 2322 bhsdi = NULL; 2323 for (;;) { 2324 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2325 if (response == NULL) { 2326 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2327 if (response == NULL) { 2328 CFISCSI_SESSION_WARN(cs, "failed to " 2329 "allocate memory; dropping connection"); 2330 ctl_set_busy(&io->scsiio); 2331 io->scsiio.be_move_done(io); 2332 cfiscsi_session_terminate(cs); 2333 return; 2334 } 2335 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2336 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2337 bhsdi->bhsdi_initiator_task_tag = 2338 bhssc->bhssc_initiator_task_tag; 2339 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2340 PDU_EXPDATASN(request)++; 2341 bhsdi->bhsdi_buffer_offset = htonl(off); 2342 } 2343 2344 if (len == 0) { 2345 addr = ctl_sglist[i].addr; 2346 len = ctl_sglist[i].len; 2347 KASSERT(len > 0, ("len <= 0")); 2348 } 2349 2350 copy_len = len; 2351 if (response->ip_data_len + copy_len > 2352 cs->cs_max_data_segment_length) 2353 copy_len = cs->cs_max_data_segment_length - 2354 response->ip_data_len; 2355 KASSERT(copy_len <= len, ("copy_len > len")); 2356 error = icl_pdu_append_data(response, addr, copy_len, M_NOWAIT); 2357 if (error != 0) { 2358 CFISCSI_SESSION_WARN(cs, "failed to " 2359 "allocate memory; dropping connection"); 2360 icl_pdu_free(response); 2361 ctl_set_busy(&io->scsiio); 2362 io->scsiio.be_move_done(io); 2363 cfiscsi_session_terminate(cs); 2364 return; 2365 } 2366 addr += copy_len; 2367 len -= copy_len; 2368 off += copy_len; 2369 io->scsiio.ext_data_filled += copy_len; 2370 2371 if (len == 0) { 2372 /* 2373 * End of scatter-gather segment; 2374 * proceed to the next one... 2375 */ 2376 if (i == ctl_sg_count - 1) { 2377 /* 2378 * ... unless this was the last one. 2379 */ 2380 break; 2381 } 2382 i++; 2383 } 2384 2385 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2386 /* 2387 * Can't stuff more data into the current PDU; 2388 * queue it. Note that's not enough to check 2389 * for kern_data_resid == 0 instead; there 2390 * may be several Data-In PDUs for the final 2391 * call to cfiscsi_datamove(), and we want 2392 * to set the F flag only on the last of them. 2393 */ 2394 if (off == io->scsiio.kern_total_len) 2395 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2396 KASSERT(response->ip_data_len > 0, 2397 ("sending empty Data-In")); 2398 cfiscsi_pdu_queue(response); 2399 response = NULL; 2400 bhsdi = NULL; 2401 } 2402 } 2403 KASSERT(i == ctl_sg_count - 1, ("missed SG segment")); 2404 KASSERT(len == 0, ("missed data from SG segment")); 2405 if (response != NULL) { 2406 if (off == io->scsiio.kern_total_len) { 2407 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2408 } else { 2409 CFISCSI_SESSION_DEBUG(cs, "not setting the F flag; " 2410 "have %zd, need %zd", off, 2411 (size_t)io->scsiio.kern_total_len); 2412 } 2413 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2414 cfiscsi_pdu_queue(response); 2415 } 2416 2417 io->scsiio.be_move_done(io); 2418} 2419 2420static void 2421cfiscsi_datamove_out(union ctl_io *io) 2422{ 2423 struct cfiscsi_session *cs; 2424 struct icl_pdu *request, *response; 2425 const struct iscsi_bhs_scsi_command *bhssc; 2426 struct iscsi_bhs_r2t *bhsr2t; 2427 struct cfiscsi_data_wait *cdw; 2428 uint32_t target_transfer_tag; 2429 bool done; 2430 2431 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2432 cs = PDU_SESSION(request); 2433 2434 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2435 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2436 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2437 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2438 2439 /* 2440 * We need to record it so that we can properly report 2441 * underflow/underflow. 2442 */ 2443 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2444 2445 CFISCSI_SESSION_LOCK(cs); 2446 target_transfer_tag = cs->cs_target_transfer_tag; 2447 cs->cs_target_transfer_tag++; 2448 CFISCSI_SESSION_UNLOCK(cs); 2449 2450#if 0 2451 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2452 "task tag 0x%x, target transfer tag 0x%x", 2453 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2454#endif 2455 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2456 if (cdw == NULL) { 2457 CFISCSI_SESSION_WARN(cs, "failed to " 2458 "allocate memory; dropping connection"); 2459 ctl_set_busy(&io->scsiio); 2460 io->scsiio.be_move_done(io); 2461 cfiscsi_session_terminate(cs); 2462 return; 2463 } 2464 cdw->cdw_ctl_io = io; 2465 cdw->cdw_target_transfer_tag = htonl(target_transfer_tag); 2466 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2467 2468 if (cs->cs_immediate_data && icl_pdu_data_segment_length(request) > 0) { 2469 done = cfiscsi_handle_data_segment(request, cdw); 2470 if (done) { 2471 uma_zfree(cfiscsi_data_wait_zone, cdw); 2472 io->scsiio.be_move_done(io); 2473 return; 2474 } 2475 2476#if 0 2477 if (io->scsiio.ext_data_filled != 0) 2478 CFISCSI_SESSION_DEBUG(cs, "got %zd bytes of immediate data, need %zd", 2479 io->scsiio.ext_data_filled, io->scsiio.kern_data_len); 2480#endif 2481 } 2482 2483 CFISCSI_SESSION_LOCK(cs); 2484 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2485 CFISCSI_SESSION_UNLOCK(cs); 2486 2487 /* 2488 * XXX: We should limit the number of outstanding R2T PDUs 2489 * per task to MaxOutstandingR2T. 2490 */ 2491 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2492 if (response == NULL) { 2493 CFISCSI_SESSION_WARN(cs, "failed to " 2494 "allocate memory; dropping connection"); 2495 ctl_set_busy(&io->scsiio); 2496 io->scsiio.be_move_done(io); 2497 cfiscsi_session_terminate(cs); 2498 return; 2499 } 2500 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2501 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2502 bhsr2t->bhsr2t_flags = 0x80; 2503 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2504 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2505 bhsr2t->bhsr2t_target_transfer_tag = htonl(target_transfer_tag); 2506 /* 2507 * XXX: Here we assume that cfiscsi_datamove() won't ever 2508 * be running concurrently on several CPUs for a given 2509 * command. 2510 */ 2511 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2512 PDU_R2TSN(request)++; 2513 /* 2514 * This is the offset within the current SCSI command; 2515 * i.e. for the first call of datamove(), it will be 0, 2516 * and for subsequent ones it will be the sum of lengths 2517 * of previous ones. 2518 * 2519 * The ext_data_filled is to account for unsolicited 2520 * (immediate) data that might have already arrived. 2521 */ 2522 bhsr2t->bhsr2t_buffer_offset = 2523 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2524 /* 2525 * This is the total length (sum of S/G lengths) this call 2526 * to cfiscsi_datamove() is supposed to handle. 2527 * 2528 * XXX: Limit it to MaxBurstLength. 2529 */ 2530 bhsr2t->bhsr2t_desired_data_transfer_length = 2531 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2532 cfiscsi_pdu_queue(response); 2533} 2534 2535static void 2536cfiscsi_datamove(union ctl_io *io) 2537{ 2538 2539 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2540 cfiscsi_datamove_in(io); 2541 else 2542 cfiscsi_datamove_out(io); 2543} 2544 2545static void 2546cfiscsi_scsi_command_done(union ctl_io *io) 2547{ 2548 struct icl_pdu *request, *response; 2549 struct iscsi_bhs_scsi_command *bhssc; 2550 struct iscsi_bhs_scsi_response *bhssr; 2551#ifdef DIAGNOSTIC 2552 struct cfiscsi_data_wait *cdw; 2553#endif 2554 struct cfiscsi_session *cs; 2555 uint16_t sense_length; 2556 2557 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2558 cs = PDU_SESSION(request); 2559 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2560 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2561 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2562 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2563 2564 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2565 // bhssc->bhssc_initiator_task_tag); 2566 2567#ifdef DIAGNOSTIC 2568 CFISCSI_SESSION_LOCK(cs); 2569 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2570 KASSERT(bhssc->bhssc_initiator_task_tag != 2571 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2572 CFISCSI_SESSION_UNLOCK(cs); 2573#endif 2574 2575 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2576 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2577 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2578 bhssr->bhssr_flags = 0x80; 2579 /* 2580 * XXX: We don't deal with bidirectional under/overflows; 2581 * does anything actually support those? 2582 */ 2583 if (PDU_TOTAL_TRANSFER_LEN(request) < 2584 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2585 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2586 bhssr->bhssr_residual_count = 2587 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2588 PDU_TOTAL_TRANSFER_LEN(request)); 2589 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2590 // ntohl(bhssr->bhssr_residual_count)); 2591 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2592 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2593 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2594 bhssr->bhssr_residual_count = 2595 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2596 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2597 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2598 // ntohl(bhssr->bhssr_residual_count)); 2599 } 2600 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2601 bhssr->bhssr_status = io->scsiio.scsi_status; 2602 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2603 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2604 2605 if (io->scsiio.sense_len > 0) { 2606#if 0 2607 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2608 io->scsiio.sense_len); 2609#endif 2610 sense_length = htons(io->scsiio.sense_len); 2611 icl_pdu_append_data(response, 2612 &sense_length, sizeof(sense_length), M_WAITOK); 2613 icl_pdu_append_data(response, 2614 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2615 } 2616 2617 ctl_free_io(io); 2618 icl_pdu_free(request); 2619 cfiscsi_pdu_queue(response); 2620} 2621 2622static void 2623cfiscsi_task_management_done(union ctl_io *io) 2624{ 2625 struct icl_pdu *request, *response; 2626 struct iscsi_bhs_task_management_request *bhstmr; 2627 struct iscsi_bhs_task_management_response *bhstmr2; 2628 struct cfiscsi_data_wait *cdw, *tmpcdw; 2629 struct cfiscsi_session *cs; 2630 2631 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2632 cs = PDU_SESSION(request); 2633 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2634 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2635 ISCSI_BHS_OPCODE_TASK_REQUEST, 2636 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2637 2638#if 0 2639 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2640 bhstmr->bhstmr_initiator_task_tag, 2641 bhstmr->bhstmr_referenced_task_tag); 2642#endif 2643 2644 if ((bhstmr->bhstmr_function & ~0x80) == 2645 BHSTMR_FUNCTION_ABORT_TASK) { 2646 /* 2647 * Make sure we no longer wait for Data-Out for this command. 2648 */ 2649 CFISCSI_SESSION_LOCK(cs); 2650 TAILQ_FOREACH_SAFE(cdw, 2651 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2652 if (bhstmr->bhstmr_referenced_task_tag != 2653 cdw->cdw_initiator_task_tag) 2654 continue; 2655 2656#if 0 2657 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2658 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2659#endif 2660 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2661 cdw, cdw_next); 2662 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2663 uma_zfree(cfiscsi_data_wait_zone, cdw); 2664 } 2665 CFISCSI_SESSION_UNLOCK(cs); 2666 } 2667 2668 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2669 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2670 response->ip_bhs; 2671 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2672 bhstmr2->bhstmr_flags = 0x80; 2673 if (io->io_hdr.status == CTL_SUCCESS) { 2674 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2675 } else { 2676 /* 2677 * XXX: How to figure out what exactly went wrong? iSCSI spec 2678 * expects us to provide detailed error, e.g. "Task does 2679 * not exist" or "LUN does not exist". 2680 */ 2681 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2682 bhstmr2->bhstmr_response = 2683 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2684 } 2685 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2686 2687 ctl_free_io(io); 2688 icl_pdu_free(request); 2689 cfiscsi_pdu_queue(response); 2690} 2691 2692static void 2693cfiscsi_done(union ctl_io *io) 2694{ 2695 struct icl_pdu *request; 2696 struct cfiscsi_session *cs; 2697 2698 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2699 ("invalid CTL status %#x", io->io_hdr.status)); 2700 2701 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2702 if (request == NULL) { 2703 /* 2704 * Implicit task termination has just completed; nothing to do. 2705 */ 2706 return; 2707 } 2708 2709 cs = PDU_SESSION(request); 2710 refcount_release(&cs->cs_outstanding_ctl_pdus); 2711 2712 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2713 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2714 cfiscsi_scsi_command_done(io); 2715 break; 2716 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2717 cfiscsi_task_management_done(io); 2718 break; 2719 default: 2720 panic("cfiscsi_done called with wrong opcode 0x%x", 2721 request->ip_bhs->bhs_opcode); 2722 } 2723} 2724