ctl_frontend_iscsi.c revision 268356
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 268356 2014-07-07 05:48:11Z mav $ 30 */ 31 32/* 33 * CTL frontend for the iSCSI protocol. 34 */ 35 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_frontend_iscsi.c 268356 2014-07-07 05:48:11Z mav $"); 38 39#include <sys/param.h> 40#include <sys/capsicum.h> 41#include <sys/condvar.h> 42#include <sys/file.h> 43#include <sys/kernel.h> 44#include <sys/kthread.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/module.h> 48#include <sys/mutex.h> 49#include <sys/queue.h> 50#include <sys/sbuf.h> 51#include <sys/sysctl.h> 52#include <sys/systm.h> 53#include <sys/uio.h> 54#include <sys/unistd.h> 55#include <vm/uma.h> 56 57#include <cam/scsi/scsi_all.h> 58#include <cam/scsi/scsi_da.h> 59#include <cam/ctl/ctl_io.h> 60#include <cam/ctl/ctl.h> 61#include <cam/ctl/ctl_backend.h> 62#include <cam/ctl/ctl_error.h> 63#include <cam/ctl/ctl_frontend.h> 64#include <cam/ctl/ctl_frontend_internal.h> 65#include <cam/ctl/ctl_debug.h> 66#include <cam/ctl/ctl_ha.h> 67#include <cam/ctl/ctl_ioctl.h> 68#include <cam/ctl/ctl_private.h> 69 70#include "../../dev/iscsi/icl.h" 71#include "../../dev/iscsi/iscsi_proto.h" 72#include "ctl_frontend_iscsi.h" 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 3; 88SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 89 &debug, 1, "Enable debug messages"); 90static int ping_timeout = 5; 91SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 92 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 93static int login_timeout = 60; 94SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 95 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 96static int maxcmdsn_delta = 256; 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 98 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 99 "without confirmation"); 100 101#define CFISCSI_DEBUG(X, ...) \ 102 do { \ 103 if (debug > 1) { \ 104 printf("%s: " X "\n", \ 105 __func__, ## __VA_ARGS__); \ 106 } \ 107 } while (0) 108 109#define CFISCSI_WARN(X, ...) \ 110 do { \ 111 if (debug > 0) { \ 112 printf("WARNING: %s: " X "\n", \ 113 __func__, ## __VA_ARGS__); \ 114 } \ 115 } while (0) 116 117#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 118 do { \ 119 if (debug > 1) { \ 120 printf("%s: %s (%s): " X "\n", \ 121 __func__, S->cs_initiator_addr, \ 122 S->cs_initiator_name, ## __VA_ARGS__); \ 123 } \ 124 } while (0) 125 126#define CFISCSI_SESSION_WARN(S, X, ...) \ 127 do { \ 128 if (debug > 0) { \ 129 printf("WARNING: %s (%s): " X "\n", \ 130 S->cs_initiator_addr, \ 131 S->cs_initiator_name, ## __VA_ARGS__); \ 132 } \ 133 } while (0) 134 135#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 136#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 137#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 138 139#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 140#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 141#define PDU_EXPDATASN(X) (X)->ip_prv0 142#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 143#define PDU_R2TSN(X) (X)->ip_prv2 144 145int cfiscsi_init(void); 146static void cfiscsi_online(void *arg); 147static void cfiscsi_offline(void *arg); 148static int cfiscsi_info(void *arg, struct sbuf *sb); 149static int cfiscsi_lun_enable(void *arg, 150 struct ctl_id target_id, int lun_id); 151static int cfiscsi_lun_disable(void *arg, 152 struct ctl_id target_id, int lun_id); 153static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 154static int cfiscsi_ioctl(struct cdev *dev, 155 u_long cmd, caddr_t addr, int flag, struct thread *td); 156static void cfiscsi_datamove(union ctl_io *io); 157static void cfiscsi_done(union ctl_io *io); 158static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 159static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 160static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 161static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 162static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 163static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 164static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 165static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 166 *softc, const char *name); 167static struct cfiscsi_target *cfiscsi_target_find_or_create( 168 struct cfiscsi_softc *softc, const char *name, const char *alias); 169static void cfiscsi_target_release(struct cfiscsi_target *ct); 170static void cfiscsi_session_delete(struct cfiscsi_session *cs); 171 172static struct cfiscsi_softc cfiscsi_softc; 173extern struct ctl_softc *control_softc; 174 175static struct ctl_frontend cfiscsi_frontend = 176{ 177 .name = "iscsi", 178 .init = cfiscsi_init, 179 .ioctl = cfiscsi_ioctl, 180}; 181CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 182 183static struct icl_pdu * 184cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 185{ 186 187 return (icl_pdu_new_bhs(request->ip_conn, flags)); 188} 189 190static bool 191cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 192{ 193 const struct iscsi_bhs_scsi_command *bhssc; 194 struct cfiscsi_session *cs; 195 uint32_t cmdsn, expstatsn; 196 197 cs = PDU_SESSION(request); 198 199 /* 200 * Every incoming PDU - not just NOP-Out - resets the ping timer. 201 * The purpose of the timeout is to reset the connection when it stalls; 202 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 203 * in some queue. 204 * 205 * XXX: Locking? 206 */ 207 cs->cs_timeout = 0; 208 209 /* 210 * Data-Out PDUs don't contain CmdSN. 211 */ 212 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 213 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 214 return (false); 215 216 /* 217 * We're only using fields common for all the request 218 * (initiator -> target) PDUs. 219 */ 220 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 221 cmdsn = ntohl(bhssc->bhssc_cmdsn); 222 expstatsn = ntohl(bhssc->bhssc_expstatsn); 223 224 CFISCSI_SESSION_LOCK(cs); 225#if 0 226 if (expstatsn != cs->cs_statsn) { 227 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 228 "while current StatSN is %d", expstatsn, 229 cs->cs_statsn); 230 } 231#endif 232 233 /* 234 * The target MUST silently ignore any non-immediate command outside 235 * of this range. 236 */ 237 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 238 CFISCSI_SESSION_UNLOCK(cs); 239 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 240 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 241 return (true); 242 } 243 244 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 245 cs->cs_cmdsn++; 246 247 CFISCSI_SESSION_UNLOCK(cs); 248 249 return (false); 250} 251 252static void 253cfiscsi_pdu_handle(struct icl_pdu *request) 254{ 255 struct cfiscsi_session *cs; 256 bool ignore; 257 258 cs = PDU_SESSION(request); 259 260 ignore = cfiscsi_pdu_update_cmdsn(request); 261 if (ignore) { 262 icl_pdu_free(request); 263 return; 264 } 265 266 /* 267 * Handle the PDU; this includes e.g. receiving the remaining 268 * part of PDU and submitting the SCSI command to CTL 269 * or queueing a reply. The handling routine is responsible 270 * for freeing the PDU when it's no longer needed. 271 */ 272 switch (request->ip_bhs->bhs_opcode & 273 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 274 case ISCSI_BHS_OPCODE_NOP_OUT: 275 cfiscsi_pdu_handle_nop_out(request); 276 break; 277 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 278 cfiscsi_pdu_handle_scsi_command(request); 279 break; 280 case ISCSI_BHS_OPCODE_TASK_REQUEST: 281 cfiscsi_pdu_handle_task_request(request); 282 break; 283 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 284 cfiscsi_pdu_handle_data_out(request); 285 break; 286 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 287 cfiscsi_pdu_handle_logout_request(request); 288 break; 289 default: 290 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 291 "opcode 0x%x; dropping connection", 292 request->ip_bhs->bhs_opcode); 293 icl_pdu_free(request); 294 cfiscsi_session_terminate(cs); 295 } 296 297} 298 299static void 300cfiscsi_receive_callback(struct icl_pdu *request) 301{ 302 struct cfiscsi_session *cs; 303 304 cs = PDU_SESSION(request); 305 306#ifdef ICL_KERNEL_PROXY 307 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 308 if (cs->cs_login_pdu == NULL) 309 cs->cs_login_pdu = request; 310 else 311 icl_pdu_free(request); 312 cv_signal(&cs->cs_login_cv); 313 return; 314 } 315#endif 316 317 cfiscsi_pdu_handle(request); 318} 319 320static void 321cfiscsi_error_callback(struct icl_conn *ic) 322{ 323 struct cfiscsi_session *cs; 324 325 cs = CONN_SESSION(ic); 326 327 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 328 cfiscsi_session_terminate(cs); 329} 330 331static int 332cfiscsi_pdu_prepare(struct icl_pdu *response) 333{ 334 struct cfiscsi_session *cs; 335 struct iscsi_bhs_scsi_response *bhssr; 336 bool advance_statsn = true; 337 338 cs = PDU_SESSION(response); 339 340 CFISCSI_SESSION_LOCK_ASSERT(cs); 341 342 /* 343 * We're only using fields common for all the response 344 * (target -> initiator) PDUs. 345 */ 346 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 347 348 /* 349 * 10.8.3: "The StatSN for this connection is not advanced 350 * after this PDU is sent." 351 */ 352 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 353 advance_statsn = false; 354 355 /* 356 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 357 * StatSN for the connection is not advanced after this PDU is sent." 358 */ 359 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 360 bhssr->bhssr_initiator_task_tag == 0xffffffff) 361 advance_statsn = false; 362 363 /* 364 * See the comment below - StatSN is not meaningful and must 365 * not be advanced. 366 */ 367 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 368 advance_statsn = false; 369 370 /* 371 * 10.7.3: "The fields StatSN, Status, and Residual Count 372 * only have meaningful content if the S bit is set to 1." 373 */ 374 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 375 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 376 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 377 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 378 379 if (advance_statsn) 380 cs->cs_statsn++; 381 382 return (0); 383} 384 385static void 386cfiscsi_pdu_queue(struct icl_pdu *response) 387{ 388 struct cfiscsi_session *cs; 389 390 cs = PDU_SESSION(response); 391 392 CFISCSI_SESSION_LOCK(cs); 393 cfiscsi_pdu_prepare(response); 394 icl_pdu_queue(response); 395 CFISCSI_SESSION_UNLOCK(cs); 396} 397 398static uint32_t 399cfiscsi_decode_lun(uint64_t encoded) 400{ 401 uint8_t lun[8]; 402 uint32_t result; 403 404 /* 405 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 406 * but is in fact an evil, multidimensional structure defined 407 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 408 */ 409 memcpy(lun, &encoded, sizeof(lun)); 410 switch (lun[0] & 0xC0) { 411 case 0x00: 412 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 413 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 414 CFISCSI_WARN("malformed LUN " 415 "(peripheral device addressing method): 0x%jx", 416 (uintmax_t)encoded); 417 result = 0xffffffff; 418 break; 419 } 420 result = lun[1]; 421 break; 422 case 0x40: 423 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 424 lun[6] != 0 || lun[7] != 0) { 425 CFISCSI_WARN("malformed LUN " 426 "(flat address space addressing method): 0x%jx", 427 (uintmax_t)encoded); 428 result = 0xffffffff; 429 break; 430 } 431 result = ((lun[0] & 0x3f) << 8) + lun[1]; 432 break; 433 case 0xC0: 434 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 435 lun[6] != 0 || lun[7] != 0) { 436 CFISCSI_WARN("malformed LUN (extended flat " 437 "address space addressing method): 0x%jx", 438 (uintmax_t)encoded); 439 result = 0xffffffff; 440 break; 441 } 442 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 443 default: 444 CFISCSI_WARN("unsupported LUN format 0x%jx", 445 (uintmax_t)encoded); 446 result = 0xffffffff; 447 break; 448 } 449 450 return (result); 451} 452 453static void 454cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 455{ 456 struct cfiscsi_session *cs; 457 struct iscsi_bhs_nop_out *bhsno; 458 struct iscsi_bhs_nop_in *bhsni; 459 struct icl_pdu *response; 460 void *data = NULL; 461 size_t datasize; 462 int error; 463 464 cs = PDU_SESSION(request); 465 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 466 467 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 468 /* 469 * Nothing to do, iscsi_pdu_update_statsn() already 470 * zeroed the timeout. 471 */ 472 icl_pdu_free(request); 473 return; 474 } 475 476 datasize = icl_pdu_data_segment_length(request); 477 if (datasize > 0) { 478 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 479 if (data == NULL) { 480 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 481 "dropping connection"); 482 icl_pdu_free(request); 483 cfiscsi_session_terminate(cs); 484 return; 485 } 486 icl_pdu_get_data(request, 0, data, datasize); 487 } 488 489 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 490 if (response == NULL) { 491 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 492 "droppping connection"); 493 free(data, M_CFISCSI); 494 icl_pdu_free(request); 495 cfiscsi_session_terminate(cs); 496 return; 497 } 498 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 499 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 500 bhsni->bhsni_flags = 0x80; 501 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 502 bhsni->bhsni_target_transfer_tag = 0xffffffff; 503 if (datasize > 0) { 504 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 505 if (error != 0) { 506 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 507 "dropping connection"); 508 free(data, M_CFISCSI); 509 icl_pdu_free(request); 510 icl_pdu_free(response); 511 cfiscsi_session_terminate(cs); 512 return; 513 } 514 free(data, M_CFISCSI); 515 } 516 517 icl_pdu_free(request); 518 cfiscsi_pdu_queue(response); 519} 520 521static void 522cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 523{ 524 struct iscsi_bhs_scsi_command *bhssc; 525 struct cfiscsi_session *cs; 526 union ctl_io *io; 527 int error; 528 529 cs = PDU_SESSION(request); 530 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 531 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 532 // bhssc->bhssc_initiator_task_tag); 533 534 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 535 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 536 "ImmediateData=No; dropping connection"); 537 icl_pdu_free(request); 538 cfiscsi_session_terminate(cs); 539 return; 540 } 541 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 542 if (io == NULL) { 543 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 544 "dropping connection"); 545 icl_pdu_free(request); 546 cfiscsi_session_terminate(cs); 547 return; 548 } 549 ctl_zero_io(io); 550 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 551 io->io_hdr.io_type = CTL_IO_SCSI; 552 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 553 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 554 io->io_hdr.nexus.targ_target.id = 0; 555 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 556 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 557 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 558 case BHSSC_FLAGS_ATTR_UNTAGGED: 559 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 560 break; 561 case BHSSC_FLAGS_ATTR_SIMPLE: 562 io->scsiio.tag_type = CTL_TAG_SIMPLE; 563 break; 564 case BHSSC_FLAGS_ATTR_ORDERED: 565 io->scsiio.tag_type = CTL_TAG_ORDERED; 566 break; 567 case BHSSC_FLAGS_ATTR_HOQ: 568 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 569 break; 570 case BHSSC_FLAGS_ATTR_ACA: 571 io->scsiio.tag_type = CTL_TAG_ACA; 572 break; 573 default: 574 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 575 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 576 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 577 break; 578 } 579 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 580 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 581 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 582 error = ctl_queue(io); 583 if (error != CTL_RETVAL_COMPLETE) { 584 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 585 "dropping connection", error); 586 ctl_free_io(io); 587 refcount_release(&cs->cs_outstanding_ctl_pdus); 588 icl_pdu_free(request); 589 cfiscsi_session_terminate(cs); 590 } 591} 592 593static void 594cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 595{ 596 struct iscsi_bhs_task_management_request *bhstmr; 597 struct iscsi_bhs_task_management_response *bhstmr2; 598 struct icl_pdu *response; 599 struct cfiscsi_session *cs; 600 union ctl_io *io; 601 int error; 602 603 cs = PDU_SESSION(request); 604 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 605 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 606 if (io == NULL) { 607 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 608 "dropping connection"); 609 icl_pdu_free(request); 610 cfiscsi_session_terminate(cs); 611 return; 612 } 613 ctl_zero_io(io); 614 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 615 io->io_hdr.io_type = CTL_IO_TASK; 616 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 617 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 618 io->io_hdr.nexus.targ_target.id = 0; 619 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 620 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 621 622 switch (bhstmr->bhstmr_function & ~0x80) { 623 case BHSTMR_FUNCTION_ABORT_TASK: 624#if 0 625 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 626#endif 627 io->taskio.task_action = CTL_TASK_ABORT_TASK; 628 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 629 break; 630 case BHSTMR_FUNCTION_ABORT_TASK_SET: 631#if 0 632 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 633#endif 634 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 635 break; 636 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 637#if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 639#endif 640 io->taskio.task_action = CTL_TASK_LUN_RESET; 641 break; 642 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 643#if 0 644 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 645#endif 646 io->taskio.task_action = CTL_TASK_TARGET_RESET; 647 break; 648 default: 649 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 650 bhstmr->bhstmr_function & ~0x80); 651 ctl_free_io(io); 652 653 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 654 if (response == NULL) { 655 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 656 "dropping connection"); 657 icl_pdu_free(request); 658 cfiscsi_session_terminate(cs); 659 return; 660 } 661 bhstmr2 = (struct iscsi_bhs_task_management_response *) 662 response->ip_bhs; 663 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 664 bhstmr2->bhstmr_flags = 0x80; 665 bhstmr2->bhstmr_response = 666 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 667 bhstmr2->bhstmr_initiator_task_tag = 668 bhstmr->bhstmr_initiator_task_tag; 669 icl_pdu_free(request); 670 cfiscsi_pdu_queue(response); 671 return; 672 } 673 674 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 675 error = ctl_queue(io); 676 if (error != CTL_RETVAL_COMPLETE) { 677 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 678 "dropping connection", error); 679 ctl_free_io(io); 680 refcount_release(&cs->cs_outstanding_ctl_pdus); 681 icl_pdu_free(request); 682 cfiscsi_session_terminate(cs); 683 } 684} 685 686static bool 687cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 688{ 689 struct iscsi_bhs_data_out *bhsdo; 690 struct cfiscsi_session *cs; 691 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 692 size_t copy_len, len, off, buffer_offset; 693 int ctl_sg_count; 694 union ctl_io *io; 695 696 cs = PDU_SESSION(request); 697 698 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 699 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 700 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 701 ISCSI_BHS_OPCODE_SCSI_COMMAND, 702 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 703 704 /* 705 * We're only using fields common for Data-Out and SCSI Command PDUs. 706 */ 707 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 708 709 io = cdw->cdw_ctl_io; 710 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 711 ("CTL_FLAG_DATA_IN")); 712 713#if 0 714 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 715 request->ip_data_len, io->scsiio.kern_total_len); 716#endif 717 718 if (io->scsiio.kern_sg_entries > 0) { 719 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 720 ctl_sg_count = io->scsiio.kern_sg_entries; 721 } else { 722 ctl_sglist = &ctl_sg_entry; 723 ctl_sglist->addr = io->scsiio.kern_data_ptr; 724 ctl_sglist->len = io->scsiio.kern_data_len; 725 ctl_sg_count = 1; 726 } 727 728 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 729 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 730 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 731 else 732 buffer_offset = 0; 733 len = icl_pdu_data_segment_length(request); 734 735 /* 736 * Make sure the offset, as sent by the initiator, matches the offset 737 * we're supposed to be at in the scatter-gather list. 738 */ 739 if (buffer_offset > 740 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 741 buffer_offset + len <= 742 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 743 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 744 "expected %zd; dropping connection", buffer_offset, 745 (size_t)io->scsiio.kern_rel_offset + 746 (size_t)io->scsiio.ext_data_filled); 747 ctl_set_data_phase_error(&io->scsiio); 748 cfiscsi_session_terminate(cs); 749 return (true); 750 } 751 752 /* 753 * This is the offset within the PDU data segment, as opposed 754 * to buffer_offset, which is the offset within the task (SCSI 755 * command). 756 */ 757 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 758 buffer_offset; 759 760 /* 761 * Iterate over the scatter/gather segments, filling them with data 762 * from the PDU data segment. Note that this can get called multiple 763 * times for one SCSI command; the cdw structure holds state for the 764 * scatter/gather list. 765 */ 766 for (;;) { 767 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 768 ("cdw->cdw_sg_index >= ctl_sg_count")); 769 if (cdw->cdw_sg_len == 0) { 770 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 771 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 772 } 773 KASSERT(off <= len, ("len > off")); 774 copy_len = len - off; 775 if (copy_len > cdw->cdw_sg_len) 776 copy_len = cdw->cdw_sg_len; 777 778 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 779 cdw->cdw_sg_addr += copy_len; 780 cdw->cdw_sg_len -= copy_len; 781 off += copy_len; 782 io->scsiio.ext_data_filled += copy_len; 783 784 if (cdw->cdw_sg_len == 0) { 785 /* 786 * End of current segment. 787 */ 788 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 789 /* 790 * Last segment in scatter/gather list. 791 */ 792 break; 793 } 794 cdw->cdw_sg_index++; 795 } 796 797 if (off == len) { 798 /* 799 * End of PDU payload. 800 */ 801 break; 802 } 803 } 804 805 if (len > off) { 806 /* 807 * In case of unsolicited data, it's possible that the buffer 808 * provided by CTL is smaller than negotiated FirstBurstLength. 809 * Just ignore the superfluous data; will ask for them with R2T 810 * on next call to cfiscsi_datamove(). 811 * 812 * This obviously can only happen with SCSI Command PDU. 813 */ 814 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 815 ISCSI_BHS_OPCODE_SCSI_COMMAND) 816 return (true); 817 818 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 819 "expected %zd; dropping connection", 820 icl_pdu_data_segment_length(request), off); 821 ctl_set_data_phase_error(&io->scsiio); 822 cfiscsi_session_terminate(cs); 823 return (true); 824 } 825 826 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len && 827 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 828 CFISCSI_SESSION_WARN(cs, "got the final packet without " 829 "the F flag; flags = 0x%x; dropping connection", 830 bhsdo->bhsdo_flags); 831 ctl_set_data_phase_error(&io->scsiio); 832 cfiscsi_session_terminate(cs); 833 return (true); 834 } 835 836 if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len && 837 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 838 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 839 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 840 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 841 "transmitted size was %zd bytes instead of %d; " 842 "dropping connection", 843 (size_t)io->scsiio.ext_data_filled, 844 io->scsiio.kern_data_len); 845 ctl_set_data_phase_error(&io->scsiio); 846 cfiscsi_session_terminate(cs); 847 return (true); 848 } else { 849 /* 850 * For SCSI Command PDU, this just means we need to 851 * solicit more data by sending R2T. 852 */ 853 return (false); 854 } 855 } 856 857 if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) { 858#if 0 859 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 860 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 861#endif 862 863 return (true); 864 } 865 866 return (false); 867} 868 869static void 870cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 871{ 872 struct iscsi_bhs_data_out *bhsdo; 873 struct cfiscsi_session *cs; 874 struct cfiscsi_data_wait *cdw = NULL; 875 union ctl_io *io; 876 bool done; 877 878 cs = PDU_SESSION(request); 879 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 880 881 CFISCSI_SESSION_LOCK(cs); 882 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 883#if 0 884 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 885 "ttt 0x%x, itt 0x%x", 886 bhsdo->bhsdo_target_transfer_tag, 887 bhsdo->bhsdo_initiator_task_tag, 888 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 889#endif 890 if (bhsdo->bhsdo_target_transfer_tag == 891 cdw->cdw_target_transfer_tag) 892 break; 893 } 894 CFISCSI_SESSION_UNLOCK(cs); 895 if (cdw == NULL) { 896 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 897 "0x%x, not found; dropping connection", 898 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 899 icl_pdu_free(request); 900 cfiscsi_session_terminate(cs); 901 return; 902 } 903 904 io = cdw->cdw_ctl_io; 905 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 906 ("CTL_FLAG_DATA_IN")); 907 908 done = cfiscsi_handle_data_segment(request, cdw); 909 if (done) { 910 CFISCSI_SESSION_LOCK(cs); 911 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 912 CFISCSI_SESSION_UNLOCK(cs); 913 uma_zfree(cfiscsi_data_wait_zone, cdw); 914 io->scsiio.be_move_done(io); 915 } 916 917 icl_pdu_free(request); 918} 919 920static void 921cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 922{ 923 struct iscsi_bhs_logout_request *bhslr; 924 struct iscsi_bhs_logout_response *bhslr2; 925 struct icl_pdu *response; 926 struct cfiscsi_session *cs; 927 928 cs = PDU_SESSION(request); 929 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 930 switch (bhslr->bhslr_reason & 0x7f) { 931 case BHSLR_REASON_CLOSE_SESSION: 932 case BHSLR_REASON_CLOSE_CONNECTION: 933 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 934 if (response == NULL) { 935 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 936 icl_pdu_free(request); 937 cfiscsi_session_terminate(cs); 938 return; 939 } 940 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 941 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 942 bhslr2->bhslr_flags = 0x80; 943 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 944 bhslr2->bhslr_initiator_task_tag = 945 bhslr->bhslr_initiator_task_tag; 946 icl_pdu_free(request); 947 cfiscsi_pdu_queue(response); 948 cfiscsi_session_terminate(cs); 949 break; 950 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 951 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 952 if (response == NULL) { 953 CFISCSI_SESSION_WARN(cs, 954 "failed to allocate memory; dropping connection"); 955 icl_pdu_free(request); 956 cfiscsi_session_terminate(cs); 957 return; 958 } 959 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 960 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 961 bhslr2->bhslr_flags = 0x80; 962 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 963 bhslr2->bhslr_initiator_task_tag = 964 bhslr->bhslr_initiator_task_tag; 965 icl_pdu_free(request); 966 cfiscsi_pdu_queue(response); 967 break; 968 default: 969 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 970 bhslr->bhslr_reason); 971 icl_pdu_free(request); 972 cfiscsi_session_terminate(cs); 973 break; 974 } 975} 976 977static void 978cfiscsi_callout(void *context) 979{ 980 struct icl_pdu *cp; 981 struct iscsi_bhs_nop_in *bhsni; 982 struct cfiscsi_session *cs; 983 984 cs = context; 985 986 if (cs->cs_terminating) 987 return; 988 989 callout_schedule(&cs->cs_callout, 1 * hz); 990 991 atomic_add_int(&cs->cs_timeout, 1); 992 993#ifdef ICL_KERNEL_PROXY 994 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 995 if (cs->cs_timeout > login_timeout) { 996 CFISCSI_SESSION_WARN(cs, "login timed out after " 997 "%d seconds; dropping connection", cs->cs_timeout); 998 cfiscsi_session_terminate(cs); 999 } 1000 return; 1001 } 1002#endif 1003 1004 if (cs->cs_timeout >= ping_timeout) { 1005 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1006 "dropping connection", ping_timeout); 1007 cfiscsi_session_terminate(cs); 1008 return; 1009 } 1010 1011 /* 1012 * If the ping was reset less than one second ago - which means 1013 * that we've received some PDU during the last second - assume 1014 * the traffic flows correctly and don't bother sending a NOP-Out. 1015 * 1016 * (It's 2 - one for one second, and one for incrementing is_timeout 1017 * earlier in this routine.) 1018 */ 1019 if (cs->cs_timeout < 2) 1020 return; 1021 1022 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1023 if (cp == NULL) { 1024 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1025 return; 1026 } 1027 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1028 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1029 bhsni->bhsni_flags = 0x80; 1030 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1031 1032 cfiscsi_pdu_queue(cp); 1033} 1034 1035static void 1036cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1037{ 1038 struct cfiscsi_data_wait *cdw; 1039 union ctl_io *io; 1040 int error, last; 1041 1042 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1043 if (io == NULL) { 1044 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1045 return; 1046 } 1047 ctl_zero_io(io); 1048 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1049 io->io_hdr.io_type = CTL_IO_TASK; 1050 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1051 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1052 io->io_hdr.nexus.targ_target.id = 0; 1053 io->io_hdr.nexus.targ_lun = 0; 1054 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1055 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1056 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1057 error = ctl_queue(io); 1058 if (error != CTL_RETVAL_COMPLETE) { 1059 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1060 refcount_release(&cs->cs_outstanding_ctl_pdus); 1061 ctl_free_io(io); 1062 } 1063 1064 CFISCSI_SESSION_LOCK(cs); 1065 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1066 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1067 CFISCSI_SESSION_UNLOCK(cs); 1068 /* 1069 * Set nonzero port status; this prevents backends from 1070 * assuming that the data transfer actually succeeded 1071 * and writing uninitialized data to disk. 1072 */ 1073 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1074 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1075 uma_zfree(cfiscsi_data_wait_zone, cdw); 1076 CFISCSI_SESSION_LOCK(cs); 1077 } 1078 CFISCSI_SESSION_UNLOCK(cs); 1079 1080 /* 1081 * Wait for CTL to terminate all the tasks. 1082 */ 1083 for (;;) { 1084 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1085 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1086 if (last != 0) 1087 break; 1088 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, " 1089 "%d remaining", cs->cs_outstanding_ctl_pdus); 1090 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1091 0, "cfiscsi_terminate", hz / 100); 1092 } 1093} 1094 1095static void 1096cfiscsi_maintenance_thread(void *arg) 1097{ 1098 struct cfiscsi_session *cs; 1099 1100 cs = arg; 1101 1102 for (;;) { 1103 CFISCSI_SESSION_LOCK(cs); 1104 if (cs->cs_terminating == false) 1105 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1106 CFISCSI_SESSION_UNLOCK(cs); 1107 1108 if (cs->cs_terminating) { 1109 1110 /* 1111 * We used to wait up to 30 seconds to deliver queued 1112 * PDUs to the initiator. We also tried hard to deliver 1113 * SCSI Responses for the aborted PDUs. We don't do 1114 * that anymore. We might need to revisit that. 1115 */ 1116 callout_drain(&cs->cs_callout); 1117 icl_conn_shutdown(cs->cs_conn); 1118 icl_conn_close(cs->cs_conn); 1119 1120 /* 1121 * At this point ICL receive thread is no longer 1122 * running; no new tasks can be queued. 1123 */ 1124 cfiscsi_session_terminate_tasks(cs); 1125 cfiscsi_session_delete(cs); 1126 kthread_exit(); 1127 return; 1128 } 1129 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1130 } 1131} 1132 1133static void 1134cfiscsi_session_terminate(struct cfiscsi_session *cs) 1135{ 1136 1137 if (cs->cs_terminating) 1138 return; 1139 cs->cs_terminating = true; 1140 cv_signal(&cs->cs_maintenance_cv); 1141#ifdef ICL_KERNEL_PROXY 1142 cv_signal(&cs->cs_login_cv); 1143#endif 1144} 1145 1146static int 1147cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1148{ 1149 int error, i; 1150 struct cfiscsi_softc *softc; 1151 1152 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1153 1154 softc = &cfiscsi_softc; 1155 1156 mtx_lock(&softc->lock); 1157 for (i = 0; i < softc->max_initiators; i++) { 1158 if (softc->ctl_initids[i] == 0) 1159 break; 1160 } 1161 if (i == softc->max_initiators) { 1162 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)", 1163 softc->max_initiators); 1164 mtx_unlock(&softc->lock); 1165 return (1); 1166 } 1167 softc->ctl_initids[i] = 1; 1168 mtx_unlock(&softc->lock); 1169 1170#if 0 1171 CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d", 1172 i, softc->max_initiators); 1173#endif 1174 cs->cs_ctl_initid = i; 1175 error = ctl_add_initiator(0x0, cs->cs_target->ct_port.targ_port, cs->cs_ctl_initid); 1176 if (error != 0) { 1177 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error); 1178 mtx_lock(&softc->lock); 1179 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1180 mtx_unlock(&softc->lock); 1181 cs->cs_ctl_initid = -1; 1182 return (1); 1183 } 1184 1185 return (0); 1186} 1187 1188static void 1189cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1190{ 1191 int error; 1192 struct cfiscsi_softc *softc; 1193 1194 if (cs->cs_ctl_initid == -1) 1195 return; 1196 1197 softc = &cfiscsi_softc; 1198 1199 error = ctl_remove_initiator(cs->cs_target->ct_port.targ_port, cs->cs_ctl_initid); 1200 if (error != 0) { 1201 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1202 error); 1203 } 1204 mtx_lock(&softc->lock); 1205 softc->ctl_initids[cs->cs_ctl_initid] = 0; 1206 mtx_unlock(&softc->lock); 1207 cs->cs_ctl_initid = -1; 1208} 1209 1210static struct cfiscsi_session * 1211cfiscsi_session_new(struct cfiscsi_softc *softc) 1212{ 1213 struct cfiscsi_session *cs; 1214 int error; 1215 1216 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1217 if (cs == NULL) { 1218 CFISCSI_WARN("malloc failed"); 1219 return (NULL); 1220 } 1221 cs->cs_ctl_initid = -1; 1222 1223 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1224 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1225 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1226 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1227#ifdef ICL_KERNEL_PROXY 1228 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1229#endif 1230 1231 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1232 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1233 cs->cs_conn->ic_error = cfiscsi_error_callback; 1234 cs->cs_conn->ic_prv0 = cs; 1235 1236 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1237 if (error != 0) { 1238 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1239 free(cs, M_CFISCSI); 1240 return (NULL); 1241 } 1242 1243 mtx_lock(&softc->lock); 1244 cs->cs_id = softc->last_session_id + 1; 1245 softc->last_session_id++; 1246 mtx_unlock(&softc->lock); 1247 1248 mtx_lock(&softc->lock); 1249 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1250 mtx_unlock(&softc->lock); 1251 1252 /* 1253 * Start pinging the initiator. 1254 */ 1255 callout_init(&cs->cs_callout, 1); 1256 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1257 1258 return (cs); 1259} 1260 1261static void 1262cfiscsi_session_delete(struct cfiscsi_session *cs) 1263{ 1264 struct cfiscsi_softc *softc; 1265 1266 softc = &cfiscsi_softc; 1267 1268 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1269 ("destroying session with outstanding CTL pdus")); 1270 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1271 ("destroying session with non-empty queue")); 1272 1273 cfiscsi_session_unregister_initiator(cs); 1274 if (cs->cs_target != NULL) 1275 cfiscsi_target_release(cs->cs_target); 1276 icl_conn_close(cs->cs_conn); 1277 icl_conn_free(cs->cs_conn); 1278 1279 mtx_lock(&softc->lock); 1280 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1281 mtx_unlock(&softc->lock); 1282 1283 free(cs, M_CFISCSI); 1284} 1285 1286int 1287cfiscsi_init(void) 1288{ 1289 struct cfiscsi_softc *softc; 1290 int retval; 1291 1292 softc = &cfiscsi_softc; 1293 retval = 0; 1294 bzero(softc, sizeof(*softc)); 1295 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1296 1297#ifdef ICL_KERNEL_PROXY 1298 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1299#endif 1300 TAILQ_INIT(&softc->sessions); 1301 TAILQ_INIT(&softc->targets); 1302 1303 softc->max_initiators = CTL_MAX_INIT_PER_PORT; 1304 1305 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1306 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1307 UMA_ALIGN_PTR, 0); 1308 1309 return (0); 1310} 1311 1312#ifdef ICL_KERNEL_PROXY 1313static void 1314cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1315{ 1316 struct cfiscsi_session *cs; 1317 1318 cs = cfiscsi_session_new(&cfiscsi_softc); 1319 if (cs == NULL) { 1320 CFISCSI_WARN("failed to create session"); 1321 return; 1322 } 1323 1324 icl_conn_handoff_sock(cs->cs_conn, so); 1325 cs->cs_initiator_sa = sa; 1326 cs->cs_portal_id = portal_id; 1327 cs->cs_waiting_for_ctld = true; 1328 cv_signal(&cfiscsi_softc.accept_cv); 1329} 1330#endif 1331 1332static void 1333cfiscsi_online(void *arg) 1334{ 1335 struct cfiscsi_softc *softc; 1336 struct cfiscsi_target *ct; 1337 int online; 1338 1339 ct = (struct cfiscsi_target *)arg; 1340 softc = ct->ct_softc; 1341 1342 mtx_lock(&softc->lock); 1343 if (ct->ct_online) { 1344 mtx_unlock(&softc->lock); 1345 return; 1346 } 1347 ct->ct_online = 1; 1348 online = softc->online++; 1349 mtx_unlock(&softc->lock); 1350 if (online > 0) 1351 return; 1352 1353#ifdef ICL_KERNEL_PROXY 1354 if (softc->listener != NULL) 1355 icl_listen_free(softc->listener); 1356 softc->listener = icl_listen_new(cfiscsi_accept); 1357#endif 1358} 1359 1360static void 1361cfiscsi_offline(void *arg) 1362{ 1363 struct cfiscsi_softc *softc; 1364 struct cfiscsi_target *ct; 1365 struct cfiscsi_session *cs; 1366 int online; 1367 1368 ct = (struct cfiscsi_target *)arg; 1369 softc = ct->ct_softc; 1370 1371 mtx_lock(&softc->lock); 1372 if (!ct->ct_online) { 1373 mtx_unlock(&softc->lock); 1374 return; 1375 } 1376 ct->ct_online = 0; 1377 online = --softc->online; 1378 1379 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1380 if (cs->cs_target == ct) 1381 cfiscsi_session_terminate(cs); 1382 } 1383 mtx_unlock(&softc->lock); 1384 if (online > 0) 1385 return; 1386 1387#ifdef ICL_KERNEL_PROXY 1388 icl_listen_free(softc->listener); 1389 softc->listener = NULL; 1390#endif 1391} 1392 1393static int 1394cfiscsi_info(void *arg, struct sbuf *sb) 1395{ 1396 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1397 int retval; 1398 1399 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1400 ct->ct_state); 1401 return (retval); 1402} 1403 1404static void 1405cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1406{ 1407 struct cfiscsi_softc *softc; 1408 struct cfiscsi_session *cs, *cs2; 1409 struct cfiscsi_target *ct; 1410 struct ctl_iscsi_handoff_params *cihp; 1411 int error; 1412 1413 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1414 softc = &cfiscsi_softc; 1415 1416 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1417 cihp->initiator_name, cihp->initiator_addr, 1418 cihp->target_name); 1419 1420 ct = cfiscsi_target_find(softc, cihp->target_name); 1421 if (ct == NULL) { 1422 ci->status = CTL_ISCSI_ERROR; 1423 snprintf(ci->error_str, sizeof(ci->error_str), 1424 "%s: target not found", __func__); 1425 return; 1426 } 1427 1428 if (ct->ct_online == 0) { 1429 ci->status = CTL_ISCSI_ERROR; 1430 snprintf(ci->error_str, sizeof(ci->error_str), 1431 "%s: port offline", __func__); 1432 cfiscsi_target_release(ct); 1433 return; 1434 } 1435 1436#ifdef ICL_KERNEL_PROXY 1437 if (cihp->socket > 0 && cihp->connection_id > 0) { 1438 snprintf(ci->error_str, sizeof(ci->error_str), 1439 "both socket and connection_id set"); 1440 ci->status = CTL_ISCSI_ERROR; 1441 cfiscsi_target_release(ct); 1442 return; 1443 } 1444 if (cihp->socket == 0) { 1445 mtx_lock(&cfiscsi_softc.lock); 1446 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1447 if (cs->cs_id == cihp->socket) 1448 break; 1449 } 1450 if (cs == NULL) { 1451 mtx_unlock(&cfiscsi_softc.lock); 1452 snprintf(ci->error_str, sizeof(ci->error_str), 1453 "connection not found"); 1454 ci->status = CTL_ISCSI_ERROR; 1455 cfiscsi_target_release(ct); 1456 return; 1457 } 1458 mtx_unlock(&cfiscsi_softc.lock); 1459 } else { 1460#endif 1461 cs = cfiscsi_session_new(softc); 1462 if (cs == NULL) { 1463 ci->status = CTL_ISCSI_ERROR; 1464 snprintf(ci->error_str, sizeof(ci->error_str), 1465 "%s: cfiscsi_session_new failed", __func__); 1466 cfiscsi_target_release(ct); 1467 return; 1468 } 1469#ifdef ICL_KERNEL_PROXY 1470 } 1471#endif 1472 cs->cs_target = ct; 1473 1474 /* 1475 * First PDU of Full Feature phase has the same CmdSN as the last 1476 * PDU from the Login Phase received from the initiator. Thus, 1477 * the -1 below. 1478 */ 1479 cs->cs_portal_group_tag = cihp->portal_group_tag; 1480 cs->cs_cmdsn = cihp->cmdsn; 1481 cs->cs_statsn = cihp->statsn; 1482 cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length; 1483 cs->cs_max_burst_length = cihp->max_burst_length; 1484 cs->cs_immediate_data = !!cihp->immediate_data; 1485 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1486 cs->cs_conn->ic_header_crc32c = true; 1487 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1488 cs->cs_conn->ic_data_crc32c = true; 1489 1490 strlcpy(cs->cs_initiator_name, 1491 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1492 strlcpy(cs->cs_initiator_addr, 1493 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1494 strlcpy(cs->cs_initiator_alias, 1495 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1496 memcpy(cs->cs_initiator_isid, 1497 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1498 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1499 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1500 cihp->initiator_isid[0], cihp->initiator_isid[1], 1501 cihp->initiator_isid[2], cihp->initiator_isid[3], 1502 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1503 1504 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1505restart: 1506 if (!cs->cs_terminating) { 1507 mtx_lock(&softc->lock); 1508 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1509 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1510 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1511 cfiscsi_session_terminate(cs2); 1512 mtx_unlock(&softc->lock); 1513 pause("cfiscsi_reinstate", 1); 1514 goto restart; 1515 } 1516 } 1517 mtx_unlock(&softc->lock); 1518 } 1519 1520 /* 1521 * Register initiator with CTL. 1522 */ 1523 cfiscsi_session_register_initiator(cs); 1524 1525#ifdef ICL_KERNEL_PROXY 1526 if (cihp->socket > 0) { 1527#endif 1528 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1529 if (error != 0) { 1530 cfiscsi_session_terminate(cs); 1531 refcount_release(&cs->cs_outstanding_ctl_pdus); 1532 ci->status = CTL_ISCSI_ERROR; 1533 snprintf(ci->error_str, sizeof(ci->error_str), 1534 "%s: icl_conn_handoff failed with error %d", 1535 __func__, error); 1536 return; 1537 } 1538#ifdef ICL_KERNEL_PROXY 1539 } 1540#endif 1541 1542#ifdef ICL_KERNEL_PROXY 1543 cs->cs_login_phase = false; 1544 1545 /* 1546 * First PDU of the Full Feature phase has likely already arrived. 1547 * We have to pick it up and execute properly. 1548 */ 1549 if (cs->cs_login_pdu != NULL) { 1550 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1551 cfiscsi_pdu_handle(cs->cs_login_pdu); 1552 cs->cs_login_pdu = NULL; 1553 } 1554#endif 1555 1556 refcount_release(&cs->cs_outstanding_ctl_pdus); 1557 ci->status = CTL_ISCSI_OK; 1558} 1559 1560static void 1561cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1562{ 1563 struct ctl_iscsi_list_params *cilp; 1564 struct cfiscsi_session *cs; 1565 struct cfiscsi_softc *softc; 1566 struct sbuf *sb; 1567 int error; 1568 1569 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1570 softc = &cfiscsi_softc; 1571 1572 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1573 if (sb == NULL) { 1574 ci->status = CTL_ISCSI_ERROR; 1575 snprintf(ci->error_str, sizeof(ci->error_str), 1576 "Unable to allocate %d bytes for iSCSI session list", 1577 cilp->alloc_len); 1578 return; 1579 } 1580 1581 sbuf_printf(sb, "<ctlislist>\n"); 1582 mtx_lock(&softc->lock); 1583 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1584#ifdef ICL_KERNEL_PROXY 1585 if (cs->cs_target == NULL) 1586 continue; 1587#endif 1588 error = sbuf_printf(sb, "<connection id=\"%d\">" 1589 "<initiator>%s</initiator>" 1590 "<initiator_addr>%s</initiator_addr>" 1591 "<initiator_alias>%s</initiator_alias>" 1592 "<target>%s</target>" 1593 "<target_alias>%s</target_alias>" 1594 "<header_digest>%s</header_digest>" 1595 "<data_digest>%s</data_digest>" 1596 "<max_data_segment_length>%zd</max_data_segment_length>" 1597 "<immediate_data>%d</immediate_data>" 1598 "<iser>%d</iser>" 1599 "</connection>\n", 1600 cs->cs_id, 1601 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1602 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1603 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1604 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1605 cs->cs_max_data_segment_length, 1606 cs->cs_immediate_data, 1607 cs->cs_conn->ic_iser); 1608 if (error != 0) 1609 break; 1610 } 1611 mtx_unlock(&softc->lock); 1612 error = sbuf_printf(sb, "</ctlislist>\n"); 1613 if (error != 0) { 1614 sbuf_delete(sb); 1615 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1616 snprintf(ci->error_str, sizeof(ci->error_str), 1617 "Out of space, %d bytes is too small", cilp->alloc_len); 1618 return; 1619 } 1620 sbuf_finish(sb); 1621 1622 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1623 cilp->fill_len = sbuf_len(sb) + 1; 1624 ci->status = CTL_ISCSI_OK; 1625 sbuf_delete(sb); 1626} 1627 1628static void 1629cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1630{ 1631 struct icl_pdu *response; 1632 struct iscsi_bhs_asynchronous_message *bhsam; 1633 struct ctl_iscsi_terminate_params *citp; 1634 struct cfiscsi_session *cs; 1635 struct cfiscsi_softc *softc; 1636 int found = 0; 1637 1638 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1639 softc = &cfiscsi_softc; 1640 1641 mtx_lock(&softc->lock); 1642 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1643 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1644 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1645 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1646 continue; 1647 1648 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1649 if (response == NULL) { 1650 /* 1651 * Oh well. Just terminate the connection. 1652 */ 1653 } else { 1654 bhsam = (struct iscsi_bhs_asynchronous_message *) 1655 response->ip_bhs; 1656 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1657 bhsam->bhsam_flags = 0x80; 1658 bhsam->bhsam_0xffffffff = 0xffffffff; 1659 bhsam->bhsam_async_event = 1660 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1661 cfiscsi_pdu_queue(response); 1662 } 1663 cfiscsi_session_terminate(cs); 1664 found++; 1665 } 1666 mtx_unlock(&softc->lock); 1667 1668 if (found == 0) { 1669 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1670 snprintf(ci->error_str, sizeof(ci->error_str), 1671 "No matching connections found"); 1672 return; 1673 } 1674 1675 ci->status = CTL_ISCSI_OK; 1676} 1677 1678static void 1679cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1680{ 1681 struct icl_pdu *response; 1682 struct iscsi_bhs_asynchronous_message *bhsam; 1683 struct ctl_iscsi_logout_params *cilp; 1684 struct cfiscsi_session *cs; 1685 struct cfiscsi_softc *softc; 1686 int found = 0; 1687 1688 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1689 softc = &cfiscsi_softc; 1690 1691 mtx_lock(&softc->lock); 1692 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1693 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1694 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1695 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1696 continue; 1697 1698 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1699 if (response == NULL) { 1700 ci->status = CTL_ISCSI_ERROR; 1701 snprintf(ci->error_str, sizeof(ci->error_str), 1702 "Unable to allocate memory"); 1703 mtx_unlock(&softc->lock); 1704 return; 1705 } 1706 bhsam = 1707 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1708 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1709 bhsam->bhsam_flags = 0x80; 1710 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1711 bhsam->bhsam_parameter3 = htons(10); 1712 cfiscsi_pdu_queue(response); 1713 found++; 1714 } 1715 mtx_unlock(&softc->lock); 1716 1717 if (found == 0) { 1718 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1719 snprintf(ci->error_str, sizeof(ci->error_str), 1720 "No matching connections found"); 1721 return; 1722 } 1723 1724 ci->status = CTL_ISCSI_OK; 1725} 1726 1727#ifdef ICL_KERNEL_PROXY 1728static void 1729cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1730{ 1731 struct ctl_iscsi_listen_params *cilp; 1732 struct sockaddr *sa; 1733 int error; 1734 1735 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1736 1737 if (cfiscsi_softc.listener == NULL) { 1738 CFISCSI_DEBUG("no listener"); 1739 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1740 ci->status = CTL_ISCSI_ERROR; 1741 return; 1742 } 1743 1744 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1745 if (error != 0) { 1746 CFISCSI_DEBUG("getsockaddr, error %d", error); 1747 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1748 ci->status = CTL_ISCSI_ERROR; 1749 return; 1750 } 1751 1752 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1753 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1754 if (error != 0) { 1755 free(sa, M_SONAME); 1756 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1757 snprintf(ci->error_str, sizeof(ci->error_str), 1758 "icl_listen_add failed, error %d", error); 1759 ci->status = CTL_ISCSI_ERROR; 1760 return; 1761 } 1762 1763 ci->status = CTL_ISCSI_OK; 1764} 1765 1766static void 1767cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1768{ 1769 struct ctl_iscsi_accept_params *ciap; 1770 struct cfiscsi_session *cs; 1771 int error; 1772 1773 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1774 1775 mtx_lock(&cfiscsi_softc.lock); 1776 for (;;) { 1777 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1778 if (cs->cs_waiting_for_ctld) 1779 break; 1780 } 1781 if (cs != NULL) 1782 break; 1783 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1784 if (error != 0) { 1785 mtx_unlock(&cfiscsi_softc.lock); 1786 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1787 ci->status = CTL_ISCSI_ERROR; 1788 return; 1789 } 1790 } 1791 mtx_unlock(&cfiscsi_softc.lock); 1792 1793 cs->cs_waiting_for_ctld = false; 1794 cs->cs_login_phase = true; 1795 1796 ciap->connection_id = cs->cs_id; 1797 ciap->portal_id = cs->cs_portal_id; 1798 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1799 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1800 cs->cs_initiator_sa->sa_len); 1801 if (error != 0) { 1802 snprintf(ci->error_str, sizeof(ci->error_str), 1803 "copyout failed with error %d", error); 1804 ci->status = CTL_ISCSI_ERROR; 1805 return; 1806 } 1807 1808 ci->status = CTL_ISCSI_OK; 1809} 1810 1811static void 1812cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1813{ 1814 struct ctl_iscsi_send_params *cisp; 1815 struct cfiscsi_session *cs; 1816 struct icl_pdu *ip; 1817 size_t datalen; 1818 void *data; 1819 int error; 1820 1821 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1822 1823 mtx_lock(&cfiscsi_softc.lock); 1824 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1825 if (cs->cs_id == cisp->connection_id) 1826 break; 1827 } 1828 if (cs == NULL) { 1829 mtx_unlock(&cfiscsi_softc.lock); 1830 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1831 ci->status = CTL_ISCSI_ERROR; 1832 return; 1833 } 1834 mtx_unlock(&cfiscsi_softc.lock); 1835 1836#if 0 1837 if (cs->cs_login_phase == false) 1838 return (EBUSY); 1839#endif 1840 1841 if (cs->cs_terminating) { 1842 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1843 ci->status = CTL_ISCSI_ERROR; 1844 return; 1845 } 1846 1847 datalen = cisp->data_segment_len; 1848 /* 1849 * XXX 1850 */ 1851 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1852 if (datalen > 65535) { 1853 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1854 ci->status = CTL_ISCSI_ERROR; 1855 return; 1856 } 1857 if (datalen > 0) { 1858 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1859 error = copyin(cisp->data_segment, data, datalen); 1860 if (error != 0) { 1861 free(data, M_CFISCSI); 1862 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1863 ci->status = CTL_ISCSI_ERROR; 1864 return; 1865 } 1866 } 1867 1868 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1869 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1870 if (datalen > 0) { 1871 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1872 free(data, M_CFISCSI); 1873 } 1874 CFISCSI_SESSION_LOCK(cs); 1875 icl_pdu_queue(ip); 1876 CFISCSI_SESSION_UNLOCK(cs); 1877 ci->status = CTL_ISCSI_OK; 1878} 1879 1880static void 1881cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1882{ 1883 struct ctl_iscsi_receive_params *cirp; 1884 struct cfiscsi_session *cs; 1885 struct icl_pdu *ip; 1886 void *data; 1887 int error; 1888 1889 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1890 1891 mtx_lock(&cfiscsi_softc.lock); 1892 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1893 if (cs->cs_id == cirp->connection_id) 1894 break; 1895 } 1896 if (cs == NULL) { 1897 mtx_unlock(&cfiscsi_softc.lock); 1898 snprintf(ci->error_str, sizeof(ci->error_str), 1899 "connection not found"); 1900 ci->status = CTL_ISCSI_ERROR; 1901 return; 1902 } 1903 mtx_unlock(&cfiscsi_softc.lock); 1904 1905#if 0 1906 if (is->is_login_phase == false) 1907 return (EBUSY); 1908#endif 1909 1910 CFISCSI_SESSION_LOCK(cs); 1911 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1912 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1913 if (error != 0) { 1914 CFISCSI_SESSION_UNLOCK(cs); 1915 snprintf(ci->error_str, sizeof(ci->error_str), 1916 "interrupted by signal"); 1917 ci->status = CTL_ISCSI_ERROR; 1918 return; 1919 } 1920 } 1921 1922 if (cs->cs_terminating) { 1923 CFISCSI_SESSION_UNLOCK(cs); 1924 snprintf(ci->error_str, sizeof(ci->error_str), 1925 "connection terminating"); 1926 ci->status = CTL_ISCSI_ERROR; 1927 return; 1928 } 1929 ip = cs->cs_login_pdu; 1930 cs->cs_login_pdu = NULL; 1931 CFISCSI_SESSION_UNLOCK(cs); 1932 1933 if (ip->ip_data_len > cirp->data_segment_len) { 1934 icl_pdu_free(ip); 1935 snprintf(ci->error_str, sizeof(ci->error_str), 1936 "data segment too big"); 1937 ci->status = CTL_ISCSI_ERROR; 1938 return; 1939 } 1940 1941 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1942 if (ip->ip_data_len > 0) { 1943 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1944 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1945 copyout(data, cirp->data_segment, ip->ip_data_len); 1946 free(data, M_CFISCSI); 1947 } 1948 1949 icl_pdu_free(ip); 1950 ci->status = CTL_ISCSI_OK; 1951} 1952 1953#endif /* !ICL_KERNEL_PROXY */ 1954 1955static void 1956cfiscsi_ioctl_port_create(struct ctl_req *req) 1957{ 1958 struct cfiscsi_target *ct; 1959 struct ctl_port *port; 1960 const char *target, *alias, *tag; 1961 struct scsi_vpd_id_descriptor *desc; 1962 ctl_options_t opts; 1963 int retval, len, idlen; 1964 1965 ctl_init_opts(&opts, req->num_args, req->kern_args); 1966 target = ctl_get_opt(&opts, "cfiscsi_target"); 1967 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1968 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1969 if (target == NULL || tag == NULL) { 1970 ctl_free_opts(&opts); 1971 req->status = CTL_LUN_ERROR; 1972 snprintf(req->error_str, sizeof(req->error_str), 1973 "Missing required argument"); 1974 return; 1975 } 1976 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1977 if (ct == NULL) { 1978 ctl_free_opts(&opts); 1979 req->status = CTL_LUN_ERROR; 1980 snprintf(req->error_str, sizeof(req->error_str), 1981 "failed to create target \"%s\"", target); 1982 return; 1983 } 1984 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1985 cfiscsi_target_release(ct); 1986 ctl_free_opts(&opts); 1987 req->status = CTL_LUN_ERROR; 1988 snprintf(req->error_str, sizeof(req->error_str), 1989 "target \"%s\" already exist", target); 1990 return; 1991 } 1992 port = &ct->ct_port; 1993 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 1994 goto done; 1995 1996 port->frontend = &cfiscsi_frontend; 1997 port->port_type = CTL_PORT_ISCSI; 1998 /* XXX KDM what should the real number be here? */ 1999 port->num_requested_ctl_io = 4096; 2000 port->port_name = "iscsi"; 2001 port->virtual_port = strtoul(tag, NULL, 0); 2002 port->port_online = cfiscsi_online; 2003 port->port_offline = cfiscsi_offline; 2004 port->port_info = cfiscsi_info; 2005 port->onoff_arg = ct; 2006 port->lun_enable = cfiscsi_lun_enable; 2007 port->lun_disable = cfiscsi_lun_disable; 2008 port->lun_map = cfiscsi_lun_map; 2009 port->targ_lun_arg = ct; 2010 port->fe_datamove = cfiscsi_datamove; 2011 port->fe_done = cfiscsi_done; 2012 2013 /* XXX KDM what should we report here? */ 2014 /* XXX These should probably be fetched from CTL. */ 2015 port->max_targets = 1; 2016 port->max_target_id = 15; 2017 2018 port->options = opts; 2019 STAILQ_INIT(&opts); 2020 2021 /* Generate Port ID. */ 2022 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2023 idlen = roundup2(idlen, 4); 2024 len = sizeof(struct scsi_vpd_device_id) + idlen; 2025 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2026 M_CTL, M_WAITOK | M_ZERO); 2027 port->port_devid->len = len; 2028 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2029 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2030 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2031 SVPD_ID_TYPE_SCSI_NAME; 2032 desc->length = idlen; 2033 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2034 target, port->virtual_port); 2035 2036 /* Generate Target ID. */ 2037 idlen = strlen(target) + 1; 2038 idlen = roundup2(idlen, 4); 2039 len = sizeof(struct scsi_vpd_device_id) + idlen; 2040 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2041 M_CTL, M_WAITOK | M_ZERO); 2042 port->target_devid->len = len; 2043 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2044 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2045 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2046 SVPD_ID_TYPE_SCSI_NAME; 2047 desc->length = idlen; 2048 strlcpy(desc->identifier, target, idlen); 2049 2050 retval = ctl_port_register(port, /*master_SC*/ 1); 2051 if (retval != 0) { 2052 ctl_free_opts(&port->options); 2053 cfiscsi_target_release(ct); 2054 free(port->port_devid, M_CFISCSI); 2055 free(port->target_devid, M_CFISCSI); 2056 req->status = CTL_LUN_ERROR; 2057 snprintf(req->error_str, sizeof(req->error_str), 2058 "ctl_frontend_register() failed with error %d", retval); 2059 return; 2060 } 2061done: 2062 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2063 req->status = CTL_LUN_OK; 2064 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2065 sizeof(port->targ_port)); //XXX 2066} 2067 2068static void 2069cfiscsi_ioctl_port_remove(struct ctl_req *req) 2070{ 2071 struct cfiscsi_target *ct; 2072 const char *target; 2073 ctl_options_t opts; 2074 2075 ctl_init_opts(&opts, req->num_args, req->kern_args); 2076 target = ctl_get_opt(&opts, "cfiscsi_target"); 2077 if (target == NULL) { 2078 ctl_free_opts(&opts); 2079 req->status = CTL_LUN_ERROR; 2080 snprintf(req->error_str, sizeof(req->error_str), 2081 "Missing required argument"); 2082 return; 2083 } 2084 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2085 if (ct == NULL) { 2086 ctl_free_opts(&opts); 2087 req->status = CTL_LUN_ERROR; 2088 snprintf(req->error_str, sizeof(req->error_str), 2089 "can't find target \"%s\"", target); 2090 return; 2091 } 2092 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2093 ctl_free_opts(&opts); 2094 req->status = CTL_LUN_ERROR; 2095 snprintf(req->error_str, sizeof(req->error_str), 2096 "target \"%s\" is already dying", target); 2097 return; 2098 } 2099 ctl_free_opts(&opts); 2100 2101 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2102 ctl_port_offline(&ct->ct_port); 2103 cfiscsi_target_release(ct); 2104 cfiscsi_target_release(ct); 2105} 2106 2107static int 2108cfiscsi_ioctl(struct cdev *dev, 2109 u_long cmd, caddr_t addr, int flag, struct thread *td) 2110{ 2111 struct ctl_iscsi *ci; 2112 struct ctl_req *req; 2113 2114 if (cmd == CTL_PORT_REQ) { 2115 req = (struct ctl_req *)addr; 2116 switch (req->reqtype) { 2117 case CTL_REQ_CREATE: 2118 cfiscsi_ioctl_port_create(req); 2119 break; 2120 case CTL_REQ_REMOVE: 2121 cfiscsi_ioctl_port_remove(req); 2122 break; 2123 default: 2124 req->status = CTL_LUN_ERROR; 2125 snprintf(req->error_str, sizeof(req->error_str), 2126 "Unsupported request type %d", req->reqtype); 2127 } 2128 return (0); 2129 } 2130 2131 if (cmd != CTL_ISCSI) 2132 return (ENOTTY); 2133 2134 ci = (struct ctl_iscsi *)addr; 2135 switch (ci->type) { 2136 case CTL_ISCSI_HANDOFF: 2137 cfiscsi_ioctl_handoff(ci); 2138 break; 2139 case CTL_ISCSI_LIST: 2140 cfiscsi_ioctl_list(ci); 2141 break; 2142 case CTL_ISCSI_TERMINATE: 2143 cfiscsi_ioctl_terminate(ci); 2144 break; 2145 case CTL_ISCSI_LOGOUT: 2146 cfiscsi_ioctl_logout(ci); 2147 break; 2148#ifdef ICL_KERNEL_PROXY 2149 case CTL_ISCSI_LISTEN: 2150 cfiscsi_ioctl_listen(ci); 2151 break; 2152 case CTL_ISCSI_ACCEPT: 2153 cfiscsi_ioctl_accept(ci); 2154 break; 2155 case CTL_ISCSI_SEND: 2156 cfiscsi_ioctl_send(ci); 2157 break; 2158 case CTL_ISCSI_RECEIVE: 2159 cfiscsi_ioctl_receive(ci); 2160 break; 2161#else 2162 case CTL_ISCSI_LISTEN: 2163 case CTL_ISCSI_ACCEPT: 2164 case CTL_ISCSI_SEND: 2165 case CTL_ISCSI_RECEIVE: 2166 ci->status = CTL_ISCSI_ERROR; 2167 snprintf(ci->error_str, sizeof(ci->error_str), 2168 "%s: CTL compiled without ICL_KERNEL_PROXY", 2169 __func__); 2170 break; 2171#endif /* !ICL_KERNEL_PROXY */ 2172 default: 2173 ci->status = CTL_ISCSI_ERROR; 2174 snprintf(ci->error_str, sizeof(ci->error_str), 2175 "%s: invalid iSCSI request type %d", __func__, ci->type); 2176 break; 2177 } 2178 2179 return (0); 2180} 2181 2182static void 2183cfiscsi_target_hold(struct cfiscsi_target *ct) 2184{ 2185 2186 refcount_acquire(&ct->ct_refcount); 2187} 2188 2189static void 2190cfiscsi_target_release(struct cfiscsi_target *ct) 2191{ 2192 struct cfiscsi_softc *softc; 2193 2194 softc = ct->ct_softc; 2195 mtx_lock(&softc->lock); 2196 if (refcount_release(&ct->ct_refcount)) { 2197 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2198 mtx_unlock(&softc->lock); 2199 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2200 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2201 if (ctl_port_deregister(&ct->ct_port) != 0) 2202 printf("%s: ctl_port_deregister() failed\n", 2203 __func__); 2204 } 2205 free(ct, M_CFISCSI); 2206 2207 return; 2208 } 2209 mtx_unlock(&softc->lock); 2210} 2211 2212static struct cfiscsi_target * 2213cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2214{ 2215 struct cfiscsi_target *ct; 2216 2217 mtx_lock(&softc->lock); 2218 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2219 if (strcmp(name, ct->ct_name) != 0 || 2220 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2221 continue; 2222 cfiscsi_target_hold(ct); 2223 mtx_unlock(&softc->lock); 2224 return (ct); 2225 } 2226 mtx_unlock(&softc->lock); 2227 2228 return (NULL); 2229} 2230 2231static struct cfiscsi_target * 2232cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2233 const char *alias) 2234{ 2235 struct cfiscsi_target *ct, *newct; 2236 int i; 2237 2238 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2239 return (NULL); 2240 2241 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2242 2243 mtx_lock(&softc->lock); 2244 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2245 if (strcmp(name, ct->ct_name) != 0 || 2246 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2247 continue; 2248 cfiscsi_target_hold(ct); 2249 mtx_unlock(&softc->lock); 2250 free(newct, M_CFISCSI); 2251 return (ct); 2252 } 2253 2254 for (i = 0; i < CTL_MAX_LUNS; i++) 2255 newct->ct_luns[i] = UINT32_MAX; 2256 2257 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2258 if (alias != NULL) 2259 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2260 refcount_init(&newct->ct_refcount, 1); 2261 newct->ct_softc = softc; 2262 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2263 mtx_unlock(&softc->lock); 2264 2265 return (newct); 2266} 2267 2268/* 2269 * Takes LUN from the target space and returns LUN from the CTL space. 2270 */ 2271static uint32_t 2272cfiscsi_lun_map(void *arg, uint32_t lun) 2273{ 2274 struct cfiscsi_target *ct = arg; 2275 2276 if (lun >= CTL_MAX_LUNS) { 2277 CFISCSI_DEBUG("requested lun number %d is higher " 2278 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2279 return (UINT32_MAX); 2280 } 2281 return (ct->ct_luns[lun]); 2282} 2283 2284static int 2285cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2286 unsigned long lun_id, unsigned long ctl_lun_id) 2287{ 2288 2289 if (lun_id >= CTL_MAX_LUNS) { 2290 CFISCSI_WARN("requested lun number %ld is higher " 2291 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2292 return (-1); 2293 } 2294 2295 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2296 /* 2297 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2298 * when the LUN is created, and a second time just before 2299 * the port is brought online; don't emit warnings 2300 * for that case. 2301 */ 2302 if (ct->ct_luns[lun_id] == ctl_lun_id) 2303 return (0); 2304 CFISCSI_WARN("lun %ld already allocated", lun_id); 2305 return (-1); 2306 } 2307 2308#if 0 2309 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2310 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2311#endif 2312 2313 ct->ct_luns[lun_id] = ctl_lun_id; 2314 2315 return (0); 2316} 2317 2318static int 2319cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2320{ 2321 struct cfiscsi_softc *softc; 2322 struct cfiscsi_target *ct; 2323 const char *target = NULL; 2324 const char *lun = NULL; 2325 unsigned long tmp; 2326 2327 ct = (struct cfiscsi_target *)arg; 2328 softc = ct->ct_softc; 2329 2330 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2331 "cfiscsi_target"); 2332 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2333 "cfiscsi_lun"); 2334 2335 if (target == NULL && lun == NULL) 2336 return (0); 2337 2338 if (target == NULL || lun == NULL) { 2339 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2340 "cfiscsi_lun, or the other way around; ignoring"); 2341 return (0); 2342 } 2343 2344 if (strcmp(target, ct->ct_name) != 0) 2345 return (0); 2346 2347 tmp = strtoul(lun, NULL, 10); 2348 cfiscsi_target_set_lun(ct, tmp, lun_id); 2349 return (0); 2350} 2351 2352static int 2353cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2354{ 2355 struct cfiscsi_softc *softc; 2356 struct cfiscsi_target *ct; 2357 int i; 2358 2359 ct = (struct cfiscsi_target *)arg; 2360 softc = ct->ct_softc; 2361 2362 mtx_lock(&softc->lock); 2363 for (i = 0; i < CTL_MAX_LUNS; i++) { 2364 if (ct->ct_luns[i] != lun_id) 2365 continue; 2366 ct->ct_luns[i] = UINT32_MAX; 2367 break; 2368 } 2369 mtx_unlock(&softc->lock); 2370 return (0); 2371} 2372 2373static void 2374cfiscsi_datamove_in(union ctl_io *io) 2375{ 2376 struct cfiscsi_session *cs; 2377 struct icl_pdu *request, *response; 2378 const struct iscsi_bhs_scsi_command *bhssc; 2379 struct iscsi_bhs_data_in *bhsdi; 2380 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2381 size_t len, expected_len, sg_len, buffer_offset; 2382 const char *sg_addr; 2383 int ctl_sg_count, error, i; 2384 2385 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2386 cs = PDU_SESSION(request); 2387 2388 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2389 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2390 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2391 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2392 2393 if (io->scsiio.kern_sg_entries > 0) { 2394 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2395 ctl_sg_count = io->scsiio.kern_sg_entries; 2396 } else { 2397 ctl_sglist = &ctl_sg_entry; 2398 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2399 ctl_sglist->len = io->scsiio.kern_data_len; 2400 ctl_sg_count = 1; 2401 } 2402 2403 /* 2404 * This is the total amount of data to be transferred within the current 2405 * SCSI command. We need to record it so that we can properly report 2406 * underflow/underflow. 2407 */ 2408 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2409 2410 /* 2411 * This is the offset within the current SCSI command; for the first 2412 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2413 * it will be the sum of lengths of previous ones. 2414 */ 2415 buffer_offset = io->scsiio.kern_rel_offset; 2416 2417 /* 2418 * This is the transfer length expected by the initiator. In theory, 2419 * it could be different from the correct amount of data from the SCSI 2420 * point of view, even if that doesn't make any sense. 2421 */ 2422 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2423#if 0 2424 if (expected_len != io->scsiio.kern_total_len) { 2425 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2426 "actual length %zd", expected_len, 2427 (size_t)io->scsiio.kern_total_len); 2428 } 2429#endif 2430 2431 if (buffer_offset >= expected_len) { 2432#if 0 2433 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2434 "already sent the expected len", buffer_offset); 2435#endif 2436 io->scsiio.be_move_done(io); 2437 return; 2438 } 2439 2440 i = 0; 2441 sg_addr = NULL; 2442 sg_len = 0; 2443 response = NULL; 2444 bhsdi = NULL; 2445 for (;;) { 2446 if (response == NULL) { 2447 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2448 if (response == NULL) { 2449 CFISCSI_SESSION_WARN(cs, "failed to " 2450 "allocate memory; dropping connection"); 2451 ctl_set_busy(&io->scsiio); 2452 io->scsiio.be_move_done(io); 2453 cfiscsi_session_terminate(cs); 2454 return; 2455 } 2456 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2457 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2458 bhsdi->bhsdi_initiator_task_tag = 2459 bhssc->bhssc_initiator_task_tag; 2460 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2461 PDU_EXPDATASN(request)++; 2462 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2463 } 2464 2465 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2466 if (sg_len == 0) { 2467 sg_addr = ctl_sglist[i].addr; 2468 sg_len = ctl_sglist[i].len; 2469 KASSERT(sg_len > 0, ("sg_len <= 0")); 2470 } 2471 2472 len = sg_len; 2473 2474 /* 2475 * Truncate to maximum data segment length. 2476 */ 2477 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2478 ("ip_data_len %zd >= max_data_segment_length %zd", 2479 response->ip_data_len, cs->cs_max_data_segment_length)); 2480 if (response->ip_data_len + len > 2481 cs->cs_max_data_segment_length) { 2482 len = cs->cs_max_data_segment_length - 2483 response->ip_data_len; 2484 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2485 len, sg_len)); 2486 } 2487 2488 /* 2489 * Truncate to expected data transfer length. 2490 */ 2491 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2492 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2493 buffer_offset, response->ip_data_len, expected_len)); 2494 if (buffer_offset + response->ip_data_len + len > expected_len) { 2495 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2496 "to expected data transfer length %zd", 2497 buffer_offset + response->ip_data_len + len, expected_len); 2498 len = expected_len - (buffer_offset + response->ip_data_len); 2499 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2500 len, sg_len)); 2501 } 2502 2503 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2504 if (error != 0) { 2505 CFISCSI_SESSION_WARN(cs, "failed to " 2506 "allocate memory; dropping connection"); 2507 icl_pdu_free(response); 2508 ctl_set_busy(&io->scsiio); 2509 io->scsiio.be_move_done(io); 2510 cfiscsi_session_terminate(cs); 2511 return; 2512 } 2513 sg_addr += len; 2514 sg_len -= len; 2515 2516 KASSERT(buffer_offset + request->ip_data_len <= expected_len, 2517 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2518 buffer_offset, request->ip_data_len, expected_len)); 2519 if (buffer_offset + request->ip_data_len == expected_len) { 2520 /* 2521 * Already have the amount of data the initiator wanted. 2522 */ 2523 break; 2524 } 2525 2526 if (sg_len == 0) { 2527 /* 2528 * End of scatter-gather segment; 2529 * proceed to the next one... 2530 */ 2531 if (i == ctl_sg_count - 1) { 2532 /* 2533 * ... unless this was the last one. 2534 */ 2535 break; 2536 } 2537 i++; 2538 } 2539 2540 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2541 /* 2542 * Can't stuff more data into the current PDU; 2543 * queue it. Note that's not enough to check 2544 * for kern_data_resid == 0 instead; there 2545 * may be several Data-In PDUs for the final 2546 * call to cfiscsi_datamove(), and we want 2547 * to set the F flag only on the last of them. 2548 */ 2549 buffer_offset += response->ip_data_len; 2550 if (buffer_offset == io->scsiio.kern_total_len || 2551 buffer_offset == expected_len) 2552 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2553 cfiscsi_pdu_queue(response); 2554 response = NULL; 2555 bhsdi = NULL; 2556 } 2557 } 2558 if (response != NULL) { 2559 buffer_offset += response->ip_data_len; 2560 if (buffer_offset == io->scsiio.kern_total_len || 2561 buffer_offset == expected_len) 2562 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2563 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2564 cfiscsi_pdu_queue(response); 2565 } 2566 2567 io->scsiio.be_move_done(io); 2568} 2569 2570static void 2571cfiscsi_datamove_out(union ctl_io *io) 2572{ 2573 struct cfiscsi_session *cs; 2574 struct icl_pdu *request, *response; 2575 const struct iscsi_bhs_scsi_command *bhssc; 2576 struct iscsi_bhs_r2t *bhsr2t; 2577 struct cfiscsi_data_wait *cdw; 2578 uint32_t target_transfer_tag; 2579 bool done; 2580 2581 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2582 cs = PDU_SESSION(request); 2583 2584 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2585 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2586 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2587 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2588 2589 /* 2590 * We need to record it so that we can properly report 2591 * underflow/underflow. 2592 */ 2593 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2594 2595 /* 2596 * We hadn't received anything during this datamove yet. 2597 */ 2598 io->scsiio.ext_data_filled = 0; 2599 2600 target_transfer_tag = 2601 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2602 2603#if 0 2604 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2605 "task tag 0x%x, target transfer tag 0x%x", 2606 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2607#endif 2608 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2609 if (cdw == NULL) { 2610 CFISCSI_SESSION_WARN(cs, "failed to " 2611 "allocate memory; dropping connection"); 2612 ctl_set_busy(&io->scsiio); 2613 io->scsiio.be_move_done(io); 2614 cfiscsi_session_terminate(cs); 2615 return; 2616 } 2617 cdw->cdw_ctl_io = io; 2618 cdw->cdw_target_transfer_tag = target_transfer_tag; 2619 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2620 2621 if (cs->cs_immediate_data && io->scsiio.kern_rel_offset < 2622 icl_pdu_data_segment_length(request)) { 2623 done = cfiscsi_handle_data_segment(request, cdw); 2624 if (done) { 2625 uma_zfree(cfiscsi_data_wait_zone, cdw); 2626 io->scsiio.be_move_done(io); 2627 return; 2628 } 2629 } 2630 2631 CFISCSI_SESSION_LOCK(cs); 2632 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2633 CFISCSI_SESSION_UNLOCK(cs); 2634 2635 /* 2636 * XXX: We should limit the number of outstanding R2T PDUs 2637 * per task to MaxOutstandingR2T. 2638 */ 2639 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2640 if (response == NULL) { 2641 CFISCSI_SESSION_WARN(cs, "failed to " 2642 "allocate memory; dropping connection"); 2643 ctl_set_busy(&io->scsiio); 2644 io->scsiio.be_move_done(io); 2645 cfiscsi_session_terminate(cs); 2646 return; 2647 } 2648 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2649 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2650 bhsr2t->bhsr2t_flags = 0x80; 2651 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2652 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2653 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2654 /* 2655 * XXX: Here we assume that cfiscsi_datamove() won't ever 2656 * be running concurrently on several CPUs for a given 2657 * command. 2658 */ 2659 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2660 PDU_R2TSN(request)++; 2661 /* 2662 * This is the offset within the current SCSI command; 2663 * i.e. for the first call of datamove(), it will be 0, 2664 * and for subsequent ones it will be the sum of lengths 2665 * of previous ones. 2666 * 2667 * The ext_data_filled is to account for unsolicited 2668 * (immediate) data that might have already arrived. 2669 */ 2670 bhsr2t->bhsr2t_buffer_offset = 2671 htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled); 2672 /* 2673 * This is the total length (sum of S/G lengths) this call 2674 * to cfiscsi_datamove() is supposed to handle. 2675 * 2676 * XXX: Limit it to MaxBurstLength. 2677 */ 2678 bhsr2t->bhsr2t_desired_data_transfer_length = 2679 htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled); 2680 cfiscsi_pdu_queue(response); 2681} 2682 2683static void 2684cfiscsi_datamove(union ctl_io *io) 2685{ 2686 2687 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2688 cfiscsi_datamove_in(io); 2689 else 2690 cfiscsi_datamove_out(io); 2691} 2692 2693static void 2694cfiscsi_scsi_command_done(union ctl_io *io) 2695{ 2696 struct icl_pdu *request, *response; 2697 struct iscsi_bhs_scsi_command *bhssc; 2698 struct iscsi_bhs_scsi_response *bhssr; 2699#ifdef DIAGNOSTIC 2700 struct cfiscsi_data_wait *cdw; 2701#endif 2702 struct cfiscsi_session *cs; 2703 uint16_t sense_length; 2704 2705 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2706 cs = PDU_SESSION(request); 2707 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2708 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2709 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2710 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2711 2712 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2713 // bhssc->bhssc_initiator_task_tag); 2714 2715#ifdef DIAGNOSTIC 2716 CFISCSI_SESSION_LOCK(cs); 2717 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2718 KASSERT(bhssc->bhssc_initiator_task_tag != 2719 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2720 CFISCSI_SESSION_UNLOCK(cs); 2721#endif 2722 2723 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2724 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2725 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2726 bhssr->bhssr_flags = 0x80; 2727 /* 2728 * XXX: We don't deal with bidirectional under/overflows; 2729 * does anything actually support those? 2730 */ 2731 if (PDU_TOTAL_TRANSFER_LEN(request) < 2732 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2733 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2734 bhssr->bhssr_residual_count = 2735 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2736 PDU_TOTAL_TRANSFER_LEN(request)); 2737 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2738 // ntohl(bhssr->bhssr_residual_count)); 2739 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2740 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2741 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2742 bhssr->bhssr_residual_count = 2743 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2744 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2745 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2746 // ntohl(bhssr->bhssr_residual_count)); 2747 } 2748 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2749 bhssr->bhssr_status = io->scsiio.scsi_status; 2750 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2751 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2752 2753 if (io->scsiio.sense_len > 0) { 2754#if 0 2755 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2756 io->scsiio.sense_len); 2757#endif 2758 sense_length = htons(io->scsiio.sense_len); 2759 icl_pdu_append_data(response, 2760 &sense_length, sizeof(sense_length), M_WAITOK); 2761 icl_pdu_append_data(response, 2762 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2763 } 2764 2765 ctl_free_io(io); 2766 icl_pdu_free(request); 2767 cfiscsi_pdu_queue(response); 2768} 2769 2770static void 2771cfiscsi_task_management_done(union ctl_io *io) 2772{ 2773 struct icl_pdu *request, *response; 2774 struct iscsi_bhs_task_management_request *bhstmr; 2775 struct iscsi_bhs_task_management_response *bhstmr2; 2776 struct cfiscsi_data_wait *cdw, *tmpcdw; 2777 struct cfiscsi_session *cs; 2778 2779 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2780 cs = PDU_SESSION(request); 2781 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2782 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2783 ISCSI_BHS_OPCODE_TASK_REQUEST, 2784 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2785 2786#if 0 2787 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2788 bhstmr->bhstmr_initiator_task_tag, 2789 bhstmr->bhstmr_referenced_task_tag); 2790#endif 2791 2792 if ((bhstmr->bhstmr_function & ~0x80) == 2793 BHSTMR_FUNCTION_ABORT_TASK) { 2794 /* 2795 * Make sure we no longer wait for Data-Out for this command. 2796 */ 2797 CFISCSI_SESSION_LOCK(cs); 2798 TAILQ_FOREACH_SAFE(cdw, 2799 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2800 if (bhstmr->bhstmr_referenced_task_tag != 2801 cdw->cdw_initiator_task_tag) 2802 continue; 2803 2804#if 0 2805 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2806 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2807#endif 2808 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2809 cdw, cdw_next); 2810 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2811 uma_zfree(cfiscsi_data_wait_zone, cdw); 2812 } 2813 CFISCSI_SESSION_UNLOCK(cs); 2814 } 2815 2816 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2817 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2818 response->ip_bhs; 2819 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2820 bhstmr2->bhstmr_flags = 0x80; 2821 if (io->io_hdr.status == CTL_SUCCESS) { 2822 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2823 } else { 2824 /* 2825 * XXX: How to figure out what exactly went wrong? iSCSI spec 2826 * expects us to provide detailed error, e.g. "Task does 2827 * not exist" or "LUN does not exist". 2828 */ 2829 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2830 bhstmr2->bhstmr_response = 2831 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2832 } 2833 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2834 2835 ctl_free_io(io); 2836 icl_pdu_free(request); 2837 cfiscsi_pdu_queue(response); 2838} 2839 2840static void 2841cfiscsi_done(union ctl_io *io) 2842{ 2843 struct icl_pdu *request; 2844 struct cfiscsi_session *cs; 2845 2846 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2847 ("invalid CTL status %#x", io->io_hdr.status)); 2848 2849 if (io->io_hdr.io_type == CTL_IO_TASK && 2850 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2851 /* 2852 * Implicit task termination has just completed; nothing to do. 2853 */ 2854 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2855 cs->cs_tasks_aborted = true; 2856 refcount_release(&cs->cs_outstanding_ctl_pdus); 2857 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2858 ctl_free_io(io); 2859 return; 2860 } 2861 2862 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2863 cs = PDU_SESSION(request); 2864 refcount_release(&cs->cs_outstanding_ctl_pdus); 2865 2866 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2867 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2868 cfiscsi_scsi_command_done(io); 2869 break; 2870 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2871 cfiscsi_task_management_done(io); 2872 break; 2873 default: 2874 panic("cfiscsi_done called with wrong opcode 0x%x", 2875 request->ip_bhs->bhs_opcode); 2876 } 2877} 2878