ctl_frontend_iscsi.c revision 273319
1178354Ssam/*- 2178354Ssam * Copyright (c) 2012 The FreeBSD Foundation 3178354Ssam * All rights reserved. 4178354Ssam * 5178354Ssam * This software was developed by Edward Tomasz Napierala under sponsorship 6178354Ssam * from the FreeBSD Foundation. 7178354Ssam * 8178354Ssam * Redistribution and use in source and binary forms, with or without 9178354Ssam * modification, are permitted provided that the following conditions 10178354Ssam * are met: 11178354Ssam * 1. Redistributions of source code must retain the above copyright 12178354Ssam * notice, this list of conditions and the following disclaimer. 13178354Ssam * 2. Redistributions in binary form must reproduce the above copyright 14178354Ssam * notice, this list of conditions and the following disclaimer in the 15178354Ssam * documentation and/or other materials provided with the distribution. 16178354Ssam * 17178354Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18178354Ssam * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19178354Ssam * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20178354Ssam * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21178354Ssam * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22178354Ssam * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23178354Ssam * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24178354Ssam * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25178354Ssam * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26178354Ssam * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27178354Ssam * SUCH DAMAGE. 28178354Ssam * 29178354Ssam * $FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 273319 2014-10-20 07:59:29Z mav $ 30178354Ssam */ 31178354Ssam 32178354Ssam/* 33178354Ssam * CTL frontend for the iSCSI protocol. 34178354Ssam */ 35178354Ssam 36244060Sadrian#include <sys/cdefs.h> 37244060Sadrian__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_frontend_iscsi.c 273319 2014-10-20 07:59:29Z mav $"); 38244060Sadrian 39244060Sadrian#include <sys/param.h> 40244060Sadrian#include <sys/capability.h> 41244060Sadrian#include <sys/condvar.h> 42178354Ssam#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 <cam/ctl/ctl_frontend_iscsi.h> 73 74#ifdef ICL_KERNEL_PROXY 75#include <sys/socketvar.h> 76#endif 77 78#ifdef ICL_KERNEL_PROXY 79FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 80#endif 81 82static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 83static uma_zone_t cfiscsi_data_wait_zone; 84 85SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0, 86 "CAM Target Layer iSCSI Frontend"); 87static int debug = 3; 88TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug); 89SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 90 &debug, 1, "Enable debug messages"); 91static int ping_timeout = 5; 92TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout); 93SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 94 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 95static int login_timeout = 60; 96TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout); 97SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 98 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 99static int maxcmdsn_delta = 256; 100TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta); 101SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN, 102 &maxcmdsn_delta, 256, "Number of commands the initiator can send " 103 "without confirmation"); 104 105#define CFISCSI_DEBUG(X, ...) \ 106 do { \ 107 if (debug > 1) { \ 108 printf("%s: " X "\n", \ 109 __func__, ## __VA_ARGS__); \ 110 } \ 111 } while (0) 112 113#define CFISCSI_WARN(X, ...) \ 114 do { \ 115 if (debug > 0) { \ 116 printf("WARNING: %s: " X "\n", \ 117 __func__, ## __VA_ARGS__); \ 118 } \ 119 } while (0) 120 121#define CFISCSI_SESSION_DEBUG(S, X, ...) \ 122 do { \ 123 if (debug > 1) { \ 124 printf("%s: %s (%s): " X "\n", \ 125 __func__, S->cs_initiator_addr, \ 126 S->cs_initiator_name, ## __VA_ARGS__); \ 127 } \ 128 } while (0) 129 130#define CFISCSI_SESSION_WARN(S, X, ...) \ 131 do { \ 132 if (debug > 0) { \ 133 printf("WARNING: %s (%s): " X "\n", \ 134 S->cs_initiator_addr, \ 135 S->cs_initiator_name, ## __VA_ARGS__); \ 136 } \ 137 } while (0) 138 139#define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 140#define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 141#define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 142 143#define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 144#define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 145#define PDU_EXPDATASN(X) (X)->ip_prv0 146#define PDU_TOTAL_TRANSFER_LEN(X) (X)->ip_prv1 147#define PDU_R2TSN(X) (X)->ip_prv2 148 149int cfiscsi_init(void); 150static void cfiscsi_online(void *arg); 151static void cfiscsi_offline(void *arg); 152static int cfiscsi_info(void *arg, struct sbuf *sb); 153static int cfiscsi_lun_enable(void *arg, 154 struct ctl_id target_id, int lun_id); 155static int cfiscsi_lun_disable(void *arg, 156 struct ctl_id target_id, int lun_id); 157static uint32_t cfiscsi_lun_map(void *arg, uint32_t lun); 158static int cfiscsi_ioctl(struct cdev *dev, 159 u_long cmd, caddr_t addr, int flag, struct thread *td); 160static void cfiscsi_datamove(union ctl_io *io); 161static void cfiscsi_datamove_in(union ctl_io *io); 162static void cfiscsi_datamove_out(union ctl_io *io); 163static void cfiscsi_done(union ctl_io *io); 164static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 165static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 166static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 167static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 168static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 169static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 170static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 171static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 172 *softc, const char *name); 173static struct cfiscsi_target *cfiscsi_target_find_or_create( 174 struct cfiscsi_softc *softc, const char *name, const char *alias); 175static void cfiscsi_target_release(struct cfiscsi_target *ct); 176static void cfiscsi_session_delete(struct cfiscsi_session *cs); 177 178static struct cfiscsi_softc cfiscsi_softc; 179extern struct ctl_softc *control_softc; 180 181static struct ctl_frontend cfiscsi_frontend = 182{ 183 .name = "iscsi", 184 .init = cfiscsi_init, 185 .ioctl = cfiscsi_ioctl, 186}; 187CTL_FRONTEND_DECLARE(ctlcfiscsi, cfiscsi_frontend); 188MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1); 189 190static struct icl_pdu * 191cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 192{ 193 194 return (icl_pdu_new_bhs(request->ip_conn, flags)); 195} 196 197static bool 198cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 199{ 200 const struct iscsi_bhs_scsi_command *bhssc; 201 struct cfiscsi_session *cs; 202 uint32_t cmdsn, expstatsn; 203 204 cs = PDU_SESSION(request); 205 206 /* 207 * Every incoming PDU - not just NOP-Out - resets the ping timer. 208 * The purpose of the timeout is to reset the connection when it stalls; 209 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 210 * in some queue. 211 * 212 * XXX: Locking? 213 */ 214 cs->cs_timeout = 0; 215 216 /* 217 * Data-Out PDUs don't contain CmdSN. 218 */ 219 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 220 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 221 return (false); 222 223 /* 224 * We're only using fields common for all the request 225 * (initiator -> target) PDUs. 226 */ 227 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 228 cmdsn = ntohl(bhssc->bhssc_cmdsn); 229 expstatsn = ntohl(bhssc->bhssc_expstatsn); 230 231 CFISCSI_SESSION_LOCK(cs); 232#if 0 233 if (expstatsn != cs->cs_statsn) { 234 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, " 235 "while current StatSN is %d", expstatsn, 236 cs->cs_statsn); 237 } 238#endif 239 240 /* 241 * The target MUST silently ignore any non-immediate command outside 242 * of this range. 243 */ 244 if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) { 245 CFISCSI_SESSION_UNLOCK(cs); 246 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, " 247 "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn); 248 return (true); 249 } 250 251 if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0) 252 cs->cs_cmdsn++; 253 254 CFISCSI_SESSION_UNLOCK(cs); 255 256 return (false); 257} 258 259static void 260cfiscsi_pdu_handle(struct icl_pdu *request) 261{ 262 struct cfiscsi_session *cs; 263 bool ignore; 264 265 cs = PDU_SESSION(request); 266 267 ignore = cfiscsi_pdu_update_cmdsn(request); 268 if (ignore) { 269 icl_pdu_free(request); 270 return; 271 } 272 273 /* 274 * Handle the PDU; this includes e.g. receiving the remaining 275 * part of PDU and submitting the SCSI command to CTL 276 * or queueing a reply. The handling routine is responsible 277 * for freeing the PDU when it's no longer needed. 278 */ 279 switch (request->ip_bhs->bhs_opcode & 280 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 281 case ISCSI_BHS_OPCODE_NOP_OUT: 282 cfiscsi_pdu_handle_nop_out(request); 283 break; 284 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 285 cfiscsi_pdu_handle_scsi_command(request); 286 break; 287 case ISCSI_BHS_OPCODE_TASK_REQUEST: 288 cfiscsi_pdu_handle_task_request(request); 289 break; 290 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 291 cfiscsi_pdu_handle_data_out(request); 292 break; 293 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 294 cfiscsi_pdu_handle_logout_request(request); 295 break; 296 default: 297 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 298 "opcode 0x%x; dropping connection", 299 request->ip_bhs->bhs_opcode); 300 icl_pdu_free(request); 301 cfiscsi_session_terminate(cs); 302 } 303 304} 305 306static void 307cfiscsi_receive_callback(struct icl_pdu *request) 308{ 309 struct cfiscsi_session *cs; 310 311 cs = PDU_SESSION(request); 312 313#ifdef ICL_KERNEL_PROXY 314 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 315 if (cs->cs_login_pdu == NULL) 316 cs->cs_login_pdu = request; 317 else 318 icl_pdu_free(request); 319 cv_signal(&cs->cs_login_cv); 320 return; 321 } 322#endif 323 324 cfiscsi_pdu_handle(request); 325} 326 327static void 328cfiscsi_error_callback(struct icl_conn *ic) 329{ 330 struct cfiscsi_session *cs; 331 332 cs = CONN_SESSION(ic); 333 334 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 335 cfiscsi_session_terminate(cs); 336} 337 338static int 339cfiscsi_pdu_prepare(struct icl_pdu *response) 340{ 341 struct cfiscsi_session *cs; 342 struct iscsi_bhs_scsi_response *bhssr; 343 bool advance_statsn = true; 344 345 cs = PDU_SESSION(response); 346 347 CFISCSI_SESSION_LOCK_ASSERT(cs); 348 349 /* 350 * We're only using fields common for all the response 351 * (target -> initiator) PDUs. 352 */ 353 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 354 355 /* 356 * 10.8.3: "The StatSN for this connection is not advanced 357 * after this PDU is sent." 358 */ 359 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 360 advance_statsn = false; 361 362 /* 363 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 364 * StatSN for the connection is not advanced after this PDU is sent." 365 */ 366 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 367 bhssr->bhssr_initiator_task_tag == 0xffffffff) 368 advance_statsn = false; 369 370 /* 371 * See the comment below - StatSN is not meaningful and must 372 * not be advanced. 373 */ 374 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN) 375 advance_statsn = false; 376 377 /* 378 * 10.7.3: "The fields StatSN, Status, and Residual Count 379 * only have meaningful content if the S bit is set to 1." 380 */ 381 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN) 382 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 383 bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn); 384 bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta); 385 386 if (advance_statsn) 387 cs->cs_statsn++; 388 389 return (0); 390} 391 392static void 393cfiscsi_pdu_queue(struct icl_pdu *response) 394{ 395 struct cfiscsi_session *cs; 396 397 cs = PDU_SESSION(response); 398 399 CFISCSI_SESSION_LOCK(cs); 400 cfiscsi_pdu_prepare(response); 401 icl_pdu_queue(response); 402 CFISCSI_SESSION_UNLOCK(cs); 403} 404 405static uint32_t 406cfiscsi_decode_lun(uint64_t encoded) 407{ 408 uint8_t lun[8]; 409 uint32_t result; 410 411 /* 412 * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number, 413 * but is in fact an evil, multidimensional structure defined 414 * in SCSI Architecture Model 5 (SAM-5), section 4.6. 415 */ 416 memcpy(lun, &encoded, sizeof(lun)); 417 switch (lun[0] & 0xC0) { 418 case 0x00: 419 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 || 420 lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) { 421 CFISCSI_WARN("malformed LUN " 422 "(peripheral device addressing method): 0x%jx", 423 (uintmax_t)encoded); 424 result = 0xffffffff; 425 break; 426 } 427 result = lun[1]; 428 break; 429 case 0x40: 430 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 || 431 lun[6] != 0 || lun[7] != 0) { 432 CFISCSI_WARN("malformed LUN " 433 "(flat address space addressing method): 0x%jx", 434 (uintmax_t)encoded); 435 result = 0xffffffff; 436 break; 437 } 438 result = ((lun[0] & 0x3f) << 8) + lun[1]; 439 break; 440 case 0xC0: 441 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 || 442 lun[6] != 0 || lun[7] != 0) { 443 CFISCSI_WARN("malformed LUN (extended flat " 444 "address space addressing method): 0x%jx", 445 (uintmax_t)encoded); 446 result = 0xffffffff; 447 break; 448 } 449 result = (lun[1] << 16) + (lun[2] << 8) + lun[3]; 450 default: 451 CFISCSI_WARN("unsupported LUN format 0x%jx", 452 (uintmax_t)encoded); 453 result = 0xffffffff; 454 break; 455 } 456 457 return (result); 458} 459 460static void 461cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 462{ 463 struct cfiscsi_session *cs; 464 struct iscsi_bhs_nop_out *bhsno; 465 struct iscsi_bhs_nop_in *bhsni; 466 struct icl_pdu *response; 467 void *data = NULL; 468 size_t datasize; 469 int error; 470 471 cs = PDU_SESSION(request); 472 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 473 474 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 475 /* 476 * Nothing to do, iscsi_pdu_update_statsn() already 477 * zeroed the timeout. 478 */ 479 icl_pdu_free(request); 480 return; 481 } 482 483 datasize = icl_pdu_data_segment_length(request); 484 if (datasize > 0) { 485 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 486 if (data == NULL) { 487 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 488 "dropping connection"); 489 icl_pdu_free(request); 490 cfiscsi_session_terminate(cs); 491 return; 492 } 493 icl_pdu_get_data(request, 0, data, datasize); 494 } 495 496 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 497 if (response == NULL) { 498 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 499 "droppping connection"); 500 free(data, M_CFISCSI); 501 icl_pdu_free(request); 502 cfiscsi_session_terminate(cs); 503 return; 504 } 505 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 506 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 507 bhsni->bhsni_flags = 0x80; 508 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 509 bhsni->bhsni_target_transfer_tag = 0xffffffff; 510 if (datasize > 0) { 511 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 512 if (error != 0) { 513 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 514 "dropping connection"); 515 free(data, M_CFISCSI); 516 icl_pdu_free(request); 517 icl_pdu_free(response); 518 cfiscsi_session_terminate(cs); 519 return; 520 } 521 free(data, M_CFISCSI); 522 } 523 524 icl_pdu_free(request); 525 cfiscsi_pdu_queue(response); 526} 527 528static void 529cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 530{ 531 struct iscsi_bhs_scsi_command *bhssc; 532 struct cfiscsi_session *cs; 533 union ctl_io *io; 534 int error; 535 536 cs = PDU_SESSION(request); 537 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 538 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 539 // bhssc->bhssc_initiator_task_tag); 540 541 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 542 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 543 "ImmediateData=No; dropping connection"); 544 icl_pdu_free(request); 545 cfiscsi_session_terminate(cs); 546 return; 547 } 548 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 549 if (io == NULL) { 550 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; " 551 "dropping connection"); 552 icl_pdu_free(request); 553 cfiscsi_session_terminate(cs); 554 return; 555 } 556 ctl_zero_io(io); 557 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 558 io->io_hdr.io_type = CTL_IO_SCSI; 559 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 560 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 561 io->io_hdr.nexus.targ_target.id = 0; 562 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun); 563 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 564 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 565 case BHSSC_FLAGS_ATTR_UNTAGGED: 566 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 567 break; 568 case BHSSC_FLAGS_ATTR_SIMPLE: 569 io->scsiio.tag_type = CTL_TAG_SIMPLE; 570 break; 571 case BHSSC_FLAGS_ATTR_ORDERED: 572 io->scsiio.tag_type = CTL_TAG_ORDERED; 573 break; 574 case BHSSC_FLAGS_ATTR_HOQ: 575 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 576 break; 577 case BHSSC_FLAGS_ATTR_ACA: 578 io->scsiio.tag_type = CTL_TAG_ACA; 579 break; 580 default: 581 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 582 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 583 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 584 break; 585 } 586 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 587 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 588 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 589 error = ctl_queue(io); 590 if (error != CTL_RETVAL_COMPLETE) { 591 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 592 "dropping connection", error); 593 ctl_free_io(io); 594 refcount_release(&cs->cs_outstanding_ctl_pdus); 595 icl_pdu_free(request); 596 cfiscsi_session_terminate(cs); 597 } 598} 599 600static void 601cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 602{ 603 struct iscsi_bhs_task_management_request *bhstmr; 604 struct iscsi_bhs_task_management_response *bhstmr2; 605 struct icl_pdu *response; 606 struct cfiscsi_session *cs; 607 union ctl_io *io; 608 int error; 609 610 cs = PDU_SESSION(request); 611 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 612 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 613 if (io == NULL) { 614 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;" 615 "dropping connection"); 616 icl_pdu_free(request); 617 cfiscsi_session_terminate(cs); 618 return; 619 } 620 ctl_zero_io(io); 621 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request; 622 io->io_hdr.io_type = CTL_IO_TASK; 623 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 624 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 625 io->io_hdr.nexus.targ_target.id = 0; 626 io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun); 627 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 628 629 switch (bhstmr->bhstmr_function & ~0x80) { 630 case BHSTMR_FUNCTION_ABORT_TASK: 631#if 0 632 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 633#endif 634 io->taskio.task_action = CTL_TASK_ABORT_TASK; 635 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 636 break; 637 case BHSTMR_FUNCTION_ABORT_TASK_SET: 638#if 0 639 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 640#endif 641 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 642 break; 643 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 644#if 0 645 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 646#endif 647 io->taskio.task_action = CTL_TASK_LUN_RESET; 648 break; 649 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 650#if 0 651 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 652#endif 653 io->taskio.task_action = CTL_TASK_TARGET_RESET; 654 break; 655 default: 656 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 657 bhstmr->bhstmr_function & ~0x80); 658 ctl_free_io(io); 659 660 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 661 if (response == NULL) { 662 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 663 "dropping connection"); 664 icl_pdu_free(request); 665 cfiscsi_session_terminate(cs); 666 return; 667 } 668 bhstmr2 = (struct iscsi_bhs_task_management_response *) 669 response->ip_bhs; 670 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 671 bhstmr2->bhstmr_flags = 0x80; 672 bhstmr2->bhstmr_response = 673 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 674 bhstmr2->bhstmr_initiator_task_tag = 675 bhstmr->bhstmr_initiator_task_tag; 676 icl_pdu_free(request); 677 cfiscsi_pdu_queue(response); 678 return; 679 } 680 681 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 682 error = ctl_queue(io); 683 if (error != CTL_RETVAL_COMPLETE) { 684 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 685 "dropping connection", error); 686 ctl_free_io(io); 687 refcount_release(&cs->cs_outstanding_ctl_pdus); 688 icl_pdu_free(request); 689 cfiscsi_session_terminate(cs); 690 } 691} 692 693static bool 694cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 695{ 696 struct iscsi_bhs_data_out *bhsdo; 697 struct cfiscsi_session *cs; 698 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 699 size_t copy_len, len, off, buffer_offset; 700 int ctl_sg_count; 701 union ctl_io *io; 702 703 cs = PDU_SESSION(request); 704 705 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 706 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 707 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 708 ISCSI_BHS_OPCODE_SCSI_COMMAND, 709 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 710 711 /* 712 * We're only using fields common for Data-Out and SCSI Command PDUs. 713 */ 714 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 715 716 io = cdw->cdw_ctl_io; 717 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 718 ("CTL_FLAG_DATA_IN")); 719 720#if 0 721 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 722 request->ip_data_len, io->scsiio.kern_total_len); 723#endif 724 725 if (io->scsiio.kern_sg_entries > 0) { 726 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 727 ctl_sg_count = io->scsiio.kern_sg_entries; 728 } else { 729 ctl_sglist = &ctl_sg_entry; 730 ctl_sglist->addr = io->scsiio.kern_data_ptr; 731 ctl_sglist->len = io->scsiio.kern_data_len; 732 ctl_sg_count = 1; 733 } 734 735 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 736 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 737 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 738 else 739 buffer_offset = 0; 740 len = icl_pdu_data_segment_length(request); 741 742 /* 743 * Make sure the offset, as sent by the initiator, matches the offset 744 * we're supposed to be at in the scatter-gather list. 745 */ 746 if (buffer_offset > 747 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 748 buffer_offset + len <= 749 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 750 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 751 "expected %zd; dropping connection", buffer_offset, 752 (size_t)io->scsiio.kern_rel_offset + 753 (size_t)io->scsiio.ext_data_filled); 754 ctl_set_data_phase_error(&io->scsiio); 755 cfiscsi_session_terminate(cs); 756 return (true); 757 } 758 759 /* 760 * This is the offset within the PDU data segment, as opposed 761 * to buffer_offset, which is the offset within the task (SCSI 762 * command). 763 */ 764 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 765 buffer_offset; 766 767 /* 768 * Iterate over the scatter/gather segments, filling them with data 769 * from the PDU data segment. Note that this can get called multiple 770 * times for one SCSI command; the cdw structure holds state for the 771 * scatter/gather list. 772 */ 773 for (;;) { 774 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 775 ("cdw->cdw_sg_index >= ctl_sg_count")); 776 if (cdw->cdw_sg_len == 0) { 777 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 778 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 779 } 780 KASSERT(off <= len, ("len > off")); 781 copy_len = len - off; 782 if (copy_len > cdw->cdw_sg_len) 783 copy_len = cdw->cdw_sg_len; 784 785 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 786 cdw->cdw_sg_addr += copy_len; 787 cdw->cdw_sg_len -= copy_len; 788 off += copy_len; 789 io->scsiio.ext_data_filled += copy_len; 790 791 if (cdw->cdw_sg_len == 0) { 792 /* 793 * End of current segment. 794 */ 795 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 796 /* 797 * Last segment in scatter/gather list. 798 */ 799 break; 800 } 801 cdw->cdw_sg_index++; 802 } 803 804 if (off == len) { 805 /* 806 * End of PDU payload. 807 */ 808 break; 809 } 810 } 811 812 if (len > off) { 813 /* 814 * In case of unsolicited data, it's possible that the buffer 815 * provided by CTL is smaller than negotiated FirstBurstLength. 816 * Just ignore the superfluous data; will ask for them with R2T 817 * on next call to cfiscsi_datamove(). 818 * 819 * This obviously can only happen with SCSI Command PDU. 820 */ 821 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 822 ISCSI_BHS_OPCODE_SCSI_COMMAND) 823 return (true); 824 825 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 826 "expected %zd; dropping connection", 827 icl_pdu_data_segment_length(request), off); 828 ctl_set_data_phase_error(&io->scsiio); 829 cfiscsi_session_terminate(cs); 830 return (true); 831 } 832 833 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 834 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 835 CFISCSI_SESSION_WARN(cs, "got the final packet without " 836 "the F flag; flags = 0x%x; dropping connection", 837 bhsdo->bhsdo_flags); 838 ctl_set_data_phase_error(&io->scsiio); 839 cfiscsi_session_terminate(cs); 840 return (true); 841 } 842 843 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 844 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 845 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 846 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 847 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 848 "transmitted size was %zd bytes instead of %d; " 849 "dropping connection", 850 (size_t)io->scsiio.ext_data_filled, 851 cdw->cdw_r2t_end); 852 ctl_set_data_phase_error(&io->scsiio); 853 cfiscsi_session_terminate(cs); 854 return (true); 855 } else { 856 /* 857 * For SCSI Command PDU, this just means we need to 858 * solicit more data by sending R2T. 859 */ 860 return (false); 861 } 862 } 863 864 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 865#if 0 866 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 867 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 868#endif 869 870 return (true); 871 } 872 873 return (false); 874} 875 876static void 877cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 878{ 879 struct iscsi_bhs_data_out *bhsdo; 880 struct cfiscsi_session *cs; 881 struct cfiscsi_data_wait *cdw = NULL; 882 union ctl_io *io; 883 bool done; 884 885 cs = PDU_SESSION(request); 886 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 887 888 CFISCSI_SESSION_LOCK(cs); 889 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 890#if 0 891 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 892 "ttt 0x%x, itt 0x%x", 893 bhsdo->bhsdo_target_transfer_tag, 894 bhsdo->bhsdo_initiator_task_tag, 895 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 896#endif 897 if (bhsdo->bhsdo_target_transfer_tag == 898 cdw->cdw_target_transfer_tag) 899 break; 900 } 901 CFISCSI_SESSION_UNLOCK(cs); 902 if (cdw == NULL) { 903 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 904 "0x%x, not found; dropping connection", 905 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 906 icl_pdu_free(request); 907 cfiscsi_session_terminate(cs); 908 return; 909 } 910 911 io = cdw->cdw_ctl_io; 912 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 913 ("CTL_FLAG_DATA_IN")); 914 915 done = cfiscsi_handle_data_segment(request, cdw); 916 if (done) { 917 CFISCSI_SESSION_LOCK(cs); 918 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 919 CFISCSI_SESSION_UNLOCK(cs); 920 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 921 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 922 uma_zfree(cfiscsi_data_wait_zone, cdw); 923 if (done) 924 io->scsiio.be_move_done(io); 925 else 926 cfiscsi_datamove_out(io); 927 } 928 929 icl_pdu_free(request); 930} 931 932static void 933cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 934{ 935 struct iscsi_bhs_logout_request *bhslr; 936 struct iscsi_bhs_logout_response *bhslr2; 937 struct icl_pdu *response; 938 struct cfiscsi_session *cs; 939 940 cs = PDU_SESSION(request); 941 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 942 switch (bhslr->bhslr_reason & 0x7f) { 943 case BHSLR_REASON_CLOSE_SESSION: 944 case BHSLR_REASON_CLOSE_CONNECTION: 945 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 946 if (response == NULL) { 947 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 948 icl_pdu_free(request); 949 cfiscsi_session_terminate(cs); 950 return; 951 } 952 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 953 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 954 bhslr2->bhslr_flags = 0x80; 955 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 956 bhslr2->bhslr_initiator_task_tag = 957 bhslr->bhslr_initiator_task_tag; 958 icl_pdu_free(request); 959 cfiscsi_pdu_queue(response); 960 cfiscsi_session_terminate(cs); 961 break; 962 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 963 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 964 if (response == NULL) { 965 CFISCSI_SESSION_WARN(cs, 966 "failed to allocate memory; dropping connection"); 967 icl_pdu_free(request); 968 cfiscsi_session_terminate(cs); 969 return; 970 } 971 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 972 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 973 bhslr2->bhslr_flags = 0x80; 974 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 975 bhslr2->bhslr_initiator_task_tag = 976 bhslr->bhslr_initiator_task_tag; 977 icl_pdu_free(request); 978 cfiscsi_pdu_queue(response); 979 break; 980 default: 981 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 982 bhslr->bhslr_reason); 983 icl_pdu_free(request); 984 cfiscsi_session_terminate(cs); 985 break; 986 } 987} 988 989static void 990cfiscsi_callout(void *context) 991{ 992 struct icl_pdu *cp; 993 struct iscsi_bhs_nop_in *bhsni; 994 struct cfiscsi_session *cs; 995 996 cs = context; 997 998 if (cs->cs_terminating) 999 return; 1000 1001 callout_schedule(&cs->cs_callout, 1 * hz); 1002 1003 atomic_add_int(&cs->cs_timeout, 1); 1004 1005#ifdef ICL_KERNEL_PROXY 1006 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1007 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1008 CFISCSI_SESSION_WARN(cs, "login timed out after " 1009 "%d seconds; dropping connection", cs->cs_timeout); 1010 cfiscsi_session_terminate(cs); 1011 } 1012 return; 1013 } 1014#endif 1015 1016 if (ping_timeout <= 0) { 1017 /* 1018 * Pings are disabled. Don't send NOP-In in this case; 1019 * user might have disabled pings to work around problems 1020 * with certain initiators that can't properly handle 1021 * NOP-In, such as iPXE. Reset the timeout, to avoid 1022 * triggering reconnection, should the user decide to 1023 * reenable them. 1024 */ 1025 cs->cs_timeout = 0; 1026 return; 1027 } 1028 1029 if (cs->cs_timeout >= ping_timeout) { 1030 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1031 "dropping connection", ping_timeout); 1032 cfiscsi_session_terminate(cs); 1033 return; 1034 } 1035 1036 /* 1037 * If the ping was reset less than one second ago - which means 1038 * that we've received some PDU during the last second - assume 1039 * the traffic flows correctly and don't bother sending a NOP-Out. 1040 * 1041 * (It's 2 - one for one second, and one for incrementing is_timeout 1042 * earlier in this routine.) 1043 */ 1044 if (cs->cs_timeout < 2) 1045 return; 1046 1047 cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1048 if (cp == NULL) { 1049 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1050 return; 1051 } 1052 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1053 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1054 bhsni->bhsni_flags = 0x80; 1055 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1056 1057 cfiscsi_pdu_queue(cp); 1058} 1059 1060static void 1061cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1062{ 1063 struct cfiscsi_data_wait *cdw; 1064 union ctl_io *io; 1065 int error, last; 1066 1067 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1068 if (io == NULL) { 1069 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io"); 1070 return; 1071 } 1072 ctl_zero_io(io); 1073 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = cs; 1074 io->io_hdr.io_type = CTL_IO_TASK; 1075 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid; 1076 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1077 io->io_hdr.nexus.targ_target.id = 0; 1078 io->io_hdr.nexus.targ_lun = 0; 1079 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1080 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1081 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1082 error = ctl_queue(io); 1083 if (error != CTL_RETVAL_COMPLETE) { 1084 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1085 refcount_release(&cs->cs_outstanding_ctl_pdus); 1086 ctl_free_io(io); 1087 } 1088 1089 CFISCSI_SESSION_LOCK(cs); 1090 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1091 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1092 CFISCSI_SESSION_UNLOCK(cs); 1093 /* 1094 * Set nonzero port status; this prevents backends from 1095 * assuming that the data transfer actually succeeded 1096 * and writing uninitialized data to disk. 1097 */ 1098 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1099 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1100 uma_zfree(cfiscsi_data_wait_zone, cdw); 1101 CFISCSI_SESSION_LOCK(cs); 1102 } 1103 CFISCSI_SESSION_UNLOCK(cs); 1104 1105 /* 1106 * Wait for CTL to terminate all the tasks. 1107 */ 1108 for (;;) { 1109 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1110 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1111 if (last != 0) 1112 break; 1113 CFISCSI_SESSION_WARN(cs, "waiting for CTL to terminate tasks, " 1114 "%d remaining", cs->cs_outstanding_ctl_pdus); 1115 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1116 0, "cfiscsi_terminate", hz / 100); 1117 } 1118} 1119 1120static void 1121cfiscsi_maintenance_thread(void *arg) 1122{ 1123 struct cfiscsi_session *cs; 1124 1125 cs = arg; 1126 1127 for (;;) { 1128 CFISCSI_SESSION_LOCK(cs); 1129 if (cs->cs_terminating == false) 1130 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1131 CFISCSI_SESSION_UNLOCK(cs); 1132 1133 if (cs->cs_terminating) { 1134 1135 /* 1136 * We used to wait up to 30 seconds to deliver queued 1137 * PDUs to the initiator. We also tried hard to deliver 1138 * SCSI Responses for the aborted PDUs. We don't do 1139 * that anymore. We might need to revisit that. 1140 */ 1141 callout_drain(&cs->cs_callout); 1142 icl_conn_close(cs->cs_conn); 1143 1144 /* 1145 * At this point ICL receive thread is no longer 1146 * running; no new tasks can be queued. 1147 */ 1148 cfiscsi_session_terminate_tasks(cs); 1149 cfiscsi_session_delete(cs); 1150 kthread_exit(); 1151 return; 1152 } 1153 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1154 } 1155} 1156 1157static void 1158cfiscsi_session_terminate(struct cfiscsi_session *cs) 1159{ 1160 1161 if (cs->cs_terminating) 1162 return; 1163 cs->cs_terminating = true; 1164 cv_signal(&cs->cs_maintenance_cv); 1165#ifdef ICL_KERNEL_PROXY 1166 cv_signal(&cs->cs_login_cv); 1167#endif 1168} 1169 1170static int 1171cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1172{ 1173 struct cfiscsi_target *ct; 1174 char *name; 1175 int i; 1176 1177 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1178 1179 ct = cs->cs_target; 1180 name = strdup(cs->cs_initiator_id, M_CTL); 1181 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1182 if (i < 0) { 1183 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1184 i); 1185 cs->cs_ctl_initid = -1; 1186 return (1); 1187 } 1188 cs->cs_ctl_initid = i; 1189#if 0 1190 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1191#endif 1192 1193 return (0); 1194} 1195 1196static void 1197cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1198{ 1199 int error; 1200 1201 if (cs->cs_ctl_initid == -1) 1202 return; 1203 1204 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1205 if (error != 0) { 1206 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1207 error); 1208 } 1209 cs->cs_ctl_initid = -1; 1210} 1211 1212static struct cfiscsi_session * 1213cfiscsi_session_new(struct cfiscsi_softc *softc) 1214{ 1215 struct cfiscsi_session *cs; 1216 int error; 1217 1218 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1219 if (cs == NULL) { 1220 CFISCSI_WARN("malloc failed"); 1221 return (NULL); 1222 } 1223 cs->cs_ctl_initid = -1; 1224 1225 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1226 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1227 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1228 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1229#ifdef ICL_KERNEL_PROXY 1230 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1231#endif 1232 1233 cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock); 1234 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1235 cs->cs_conn->ic_error = cfiscsi_error_callback; 1236 cs->cs_conn->ic_prv0 = cs; 1237 1238 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1239 if (error != 0) { 1240 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1241 free(cs, M_CFISCSI); 1242 return (NULL); 1243 } 1244 1245 mtx_lock(&softc->lock); 1246 cs->cs_id = softc->last_session_id + 1; 1247 softc->last_session_id++; 1248 mtx_unlock(&softc->lock); 1249 1250 mtx_lock(&softc->lock); 1251 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1252 mtx_unlock(&softc->lock); 1253 1254 /* 1255 * Start pinging the initiator. 1256 */ 1257 callout_init(&cs->cs_callout, 1); 1258 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1259 1260 return (cs); 1261} 1262 1263static void 1264cfiscsi_session_delete(struct cfiscsi_session *cs) 1265{ 1266 struct cfiscsi_softc *softc; 1267 1268 softc = &cfiscsi_softc; 1269 1270 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1271 ("destroying session with outstanding CTL pdus")); 1272 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1273 ("destroying session with non-empty queue")); 1274 1275 cfiscsi_session_unregister_initiator(cs); 1276 if (cs->cs_target != NULL) 1277 cfiscsi_target_release(cs->cs_target); 1278 icl_conn_close(cs->cs_conn); 1279 icl_conn_free(cs->cs_conn); 1280 1281 mtx_lock(&softc->lock); 1282 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1283 mtx_unlock(&softc->lock); 1284 1285 free(cs, M_CFISCSI); 1286} 1287 1288int 1289cfiscsi_init(void) 1290{ 1291 struct cfiscsi_softc *softc; 1292 int retval; 1293 1294 softc = &cfiscsi_softc; 1295 retval = 0; 1296 bzero(softc, sizeof(*softc)); 1297 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1298 1299#ifdef ICL_KERNEL_PROXY 1300 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1301#endif 1302 TAILQ_INIT(&softc->sessions); 1303 TAILQ_INIT(&softc->targets); 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 cs->cs_target == cs2->cs_target && 1511 cs->cs_portal_group_tag == cs2->cs_portal_group_tag && 1512 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1513 cfiscsi_session_terminate(cs2); 1514 mtx_unlock(&softc->lock); 1515 pause("cfiscsi_reinstate", 1); 1516 goto restart; 1517 } 1518 } 1519 mtx_unlock(&softc->lock); 1520 } 1521 1522 /* 1523 * Register initiator with CTL. 1524 */ 1525 cfiscsi_session_register_initiator(cs); 1526 1527#ifdef ICL_KERNEL_PROXY 1528 if (cihp->socket > 0) { 1529#endif 1530 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1531 if (error != 0) { 1532 cfiscsi_session_terminate(cs); 1533 refcount_release(&cs->cs_outstanding_ctl_pdus); 1534 ci->status = CTL_ISCSI_ERROR; 1535 snprintf(ci->error_str, sizeof(ci->error_str), 1536 "%s: icl_conn_handoff failed with error %d", 1537 __func__, error); 1538 return; 1539 } 1540#ifdef ICL_KERNEL_PROXY 1541 } 1542#endif 1543 1544#ifdef ICL_KERNEL_PROXY 1545 cs->cs_login_phase = false; 1546 1547 /* 1548 * First PDU of the Full Feature phase has likely already arrived. 1549 * We have to pick it up and execute properly. 1550 */ 1551 if (cs->cs_login_pdu != NULL) { 1552 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1553 cfiscsi_pdu_handle(cs->cs_login_pdu); 1554 cs->cs_login_pdu = NULL; 1555 } 1556#endif 1557 1558 refcount_release(&cs->cs_outstanding_ctl_pdus); 1559 ci->status = CTL_ISCSI_OK; 1560} 1561 1562static void 1563cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1564{ 1565 struct ctl_iscsi_list_params *cilp; 1566 struct cfiscsi_session *cs; 1567 struct cfiscsi_softc *softc; 1568 struct sbuf *sb; 1569 int error; 1570 1571 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1572 softc = &cfiscsi_softc; 1573 1574 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1575 if (sb == NULL) { 1576 ci->status = CTL_ISCSI_ERROR; 1577 snprintf(ci->error_str, sizeof(ci->error_str), 1578 "Unable to allocate %d bytes for iSCSI session list", 1579 cilp->alloc_len); 1580 return; 1581 } 1582 1583 sbuf_printf(sb, "<ctlislist>\n"); 1584 mtx_lock(&softc->lock); 1585 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1586#ifdef ICL_KERNEL_PROXY 1587 if (cs->cs_target == NULL) 1588 continue; 1589#endif 1590 error = sbuf_printf(sb, "<connection id=\"%d\">" 1591 "<initiator>%s</initiator>" 1592 "<initiator_addr>%s</initiator_addr>" 1593 "<initiator_alias>%s</initiator_alias>" 1594 "<target>%s</target>" 1595 "<target_alias>%s</target_alias>" 1596 "<header_digest>%s</header_digest>" 1597 "<data_digest>%s</data_digest>" 1598 "<max_data_segment_length>%zd</max_data_segment_length>" 1599 "<immediate_data>%d</immediate_data>" 1600 "<iser>%d</iser>" 1601 "</connection>\n", 1602 cs->cs_id, 1603 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1604 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1605 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1606 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1607 cs->cs_max_data_segment_length, 1608 cs->cs_immediate_data, 1609 cs->cs_conn->ic_iser); 1610 if (error != 0) 1611 break; 1612 } 1613 mtx_unlock(&softc->lock); 1614 error = sbuf_printf(sb, "</ctlislist>\n"); 1615 if (error != 0) { 1616 sbuf_delete(sb); 1617 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1618 snprintf(ci->error_str, sizeof(ci->error_str), 1619 "Out of space, %d bytes is too small", cilp->alloc_len); 1620 return; 1621 } 1622 sbuf_finish(sb); 1623 1624 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1625 cilp->fill_len = sbuf_len(sb) + 1; 1626 ci->status = CTL_ISCSI_OK; 1627 sbuf_delete(sb); 1628} 1629 1630static void 1631cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1632{ 1633 struct icl_pdu *response; 1634 struct iscsi_bhs_asynchronous_message *bhsam; 1635 struct ctl_iscsi_terminate_params *citp; 1636 struct cfiscsi_session *cs; 1637 struct cfiscsi_softc *softc; 1638 int found = 0; 1639 1640 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1641 softc = &cfiscsi_softc; 1642 1643 mtx_lock(&softc->lock); 1644 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1645 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1646 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1647 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1648 continue; 1649 1650 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1651 if (response == NULL) { 1652 /* 1653 * Oh well. Just terminate the connection. 1654 */ 1655 } else { 1656 bhsam = (struct iscsi_bhs_asynchronous_message *) 1657 response->ip_bhs; 1658 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1659 bhsam->bhsam_flags = 0x80; 1660 bhsam->bhsam_0xffffffff = 0xffffffff; 1661 bhsam->bhsam_async_event = 1662 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1663 cfiscsi_pdu_queue(response); 1664 } 1665 cfiscsi_session_terminate(cs); 1666 found++; 1667 } 1668 mtx_unlock(&softc->lock); 1669 1670 if (found == 0) { 1671 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1672 snprintf(ci->error_str, sizeof(ci->error_str), 1673 "No matching connections found"); 1674 return; 1675 } 1676 1677 ci->status = CTL_ISCSI_OK; 1678} 1679 1680static void 1681cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1682{ 1683 struct icl_pdu *response; 1684 struct iscsi_bhs_asynchronous_message *bhsam; 1685 struct ctl_iscsi_logout_params *cilp; 1686 struct cfiscsi_session *cs; 1687 struct cfiscsi_softc *softc; 1688 int found = 0; 1689 1690 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1691 softc = &cfiscsi_softc; 1692 1693 mtx_lock(&softc->lock); 1694 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1695 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1696 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1697 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1698 continue; 1699 1700 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT); 1701 if (response == NULL) { 1702 ci->status = CTL_ISCSI_ERROR; 1703 snprintf(ci->error_str, sizeof(ci->error_str), 1704 "Unable to allocate memory"); 1705 mtx_unlock(&softc->lock); 1706 return; 1707 } 1708 bhsam = 1709 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1710 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1711 bhsam->bhsam_flags = 0x80; 1712 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1713 bhsam->bhsam_parameter3 = htons(10); 1714 cfiscsi_pdu_queue(response); 1715 found++; 1716 } 1717 mtx_unlock(&softc->lock); 1718 1719 if (found == 0) { 1720 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1721 snprintf(ci->error_str, sizeof(ci->error_str), 1722 "No matching connections found"); 1723 return; 1724 } 1725 1726 ci->status = CTL_ISCSI_OK; 1727} 1728 1729#ifdef ICL_KERNEL_PROXY 1730static void 1731cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1732{ 1733 struct ctl_iscsi_listen_params *cilp; 1734 struct sockaddr *sa; 1735 int error; 1736 1737 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1738 1739 if (cfiscsi_softc.listener == NULL) { 1740 CFISCSI_DEBUG("no listener"); 1741 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1742 ci->status = CTL_ISCSI_ERROR; 1743 return; 1744 } 1745 1746 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1747 if (error != 0) { 1748 CFISCSI_DEBUG("getsockaddr, error %d", error); 1749 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1750 ci->status = CTL_ISCSI_ERROR; 1751 return; 1752 } 1753 1754 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1755 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1756 if (error != 0) { 1757 free(sa, M_SONAME); 1758 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1759 snprintf(ci->error_str, sizeof(ci->error_str), 1760 "icl_listen_add failed, error %d", error); 1761 ci->status = CTL_ISCSI_ERROR; 1762 return; 1763 } 1764 1765 ci->status = CTL_ISCSI_OK; 1766} 1767 1768static void 1769cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1770{ 1771 struct ctl_iscsi_accept_params *ciap; 1772 struct cfiscsi_session *cs; 1773 int error; 1774 1775 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1776 1777 mtx_lock(&cfiscsi_softc.lock); 1778 for (;;) { 1779 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1780 if (cs->cs_waiting_for_ctld) 1781 break; 1782 } 1783 if (cs != NULL) 1784 break; 1785 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1786 if (error != 0) { 1787 mtx_unlock(&cfiscsi_softc.lock); 1788 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1789 ci->status = CTL_ISCSI_ERROR; 1790 return; 1791 } 1792 } 1793 mtx_unlock(&cfiscsi_softc.lock); 1794 1795 cs->cs_waiting_for_ctld = false; 1796 cs->cs_login_phase = true; 1797 1798 ciap->connection_id = cs->cs_id; 1799 ciap->portal_id = cs->cs_portal_id; 1800 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1801 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1802 cs->cs_initiator_sa->sa_len); 1803 if (error != 0) { 1804 snprintf(ci->error_str, sizeof(ci->error_str), 1805 "copyout failed with error %d", error); 1806 ci->status = CTL_ISCSI_ERROR; 1807 return; 1808 } 1809 1810 ci->status = CTL_ISCSI_OK; 1811} 1812 1813static void 1814cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1815{ 1816 struct ctl_iscsi_send_params *cisp; 1817 struct cfiscsi_session *cs; 1818 struct icl_pdu *ip; 1819 size_t datalen; 1820 void *data; 1821 int error; 1822 1823 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1824 1825 mtx_lock(&cfiscsi_softc.lock); 1826 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1827 if (cs->cs_id == cisp->connection_id) 1828 break; 1829 } 1830 if (cs == NULL) { 1831 mtx_unlock(&cfiscsi_softc.lock); 1832 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 1833 ci->status = CTL_ISCSI_ERROR; 1834 return; 1835 } 1836 mtx_unlock(&cfiscsi_softc.lock); 1837 1838#if 0 1839 if (cs->cs_login_phase == false) 1840 return (EBUSY); 1841#endif 1842 1843 if (cs->cs_terminating) { 1844 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 1845 ci->status = CTL_ISCSI_ERROR; 1846 return; 1847 } 1848 1849 datalen = cisp->data_segment_len; 1850 /* 1851 * XXX 1852 */ 1853 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 1854 if (datalen > 65535) { 1855 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 1856 ci->status = CTL_ISCSI_ERROR; 1857 return; 1858 } 1859 if (datalen > 0) { 1860 data = malloc(datalen, M_CFISCSI, M_WAITOK); 1861 error = copyin(cisp->data_segment, data, datalen); 1862 if (error != 0) { 1863 free(data, M_CFISCSI); 1864 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 1865 ci->status = CTL_ISCSI_ERROR; 1866 return; 1867 } 1868 } 1869 1870 ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK); 1871 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 1872 if (datalen > 0) { 1873 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 1874 free(data, M_CFISCSI); 1875 } 1876 CFISCSI_SESSION_LOCK(cs); 1877 icl_pdu_queue(ip); 1878 CFISCSI_SESSION_UNLOCK(cs); 1879 ci->status = CTL_ISCSI_OK; 1880} 1881 1882static void 1883cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 1884{ 1885 struct ctl_iscsi_receive_params *cirp; 1886 struct cfiscsi_session *cs; 1887 struct icl_pdu *ip; 1888 void *data; 1889 int error; 1890 1891 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 1892 1893 mtx_lock(&cfiscsi_softc.lock); 1894 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1895 if (cs->cs_id == cirp->connection_id) 1896 break; 1897 } 1898 if (cs == NULL) { 1899 mtx_unlock(&cfiscsi_softc.lock); 1900 snprintf(ci->error_str, sizeof(ci->error_str), 1901 "connection not found"); 1902 ci->status = CTL_ISCSI_ERROR; 1903 return; 1904 } 1905 mtx_unlock(&cfiscsi_softc.lock); 1906 1907#if 0 1908 if (is->is_login_phase == false) 1909 return (EBUSY); 1910#endif 1911 1912 CFISCSI_SESSION_LOCK(cs); 1913 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 1914 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 1915 if (error != 0) { 1916 CFISCSI_SESSION_UNLOCK(cs); 1917 snprintf(ci->error_str, sizeof(ci->error_str), 1918 "interrupted by signal"); 1919 ci->status = CTL_ISCSI_ERROR; 1920 return; 1921 } 1922 } 1923 1924 if (cs->cs_terminating) { 1925 CFISCSI_SESSION_UNLOCK(cs); 1926 snprintf(ci->error_str, sizeof(ci->error_str), 1927 "connection terminating"); 1928 ci->status = CTL_ISCSI_ERROR; 1929 return; 1930 } 1931 ip = cs->cs_login_pdu; 1932 cs->cs_login_pdu = NULL; 1933 CFISCSI_SESSION_UNLOCK(cs); 1934 1935 if (ip->ip_data_len > cirp->data_segment_len) { 1936 icl_pdu_free(ip); 1937 snprintf(ci->error_str, sizeof(ci->error_str), 1938 "data segment too big"); 1939 ci->status = CTL_ISCSI_ERROR; 1940 return; 1941 } 1942 1943 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 1944 if (ip->ip_data_len > 0) { 1945 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 1946 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 1947 copyout(data, cirp->data_segment, ip->ip_data_len); 1948 free(data, M_CFISCSI); 1949 } 1950 1951 icl_pdu_free(ip); 1952 ci->status = CTL_ISCSI_OK; 1953} 1954 1955#endif /* !ICL_KERNEL_PROXY */ 1956 1957static void 1958cfiscsi_ioctl_port_create(struct ctl_req *req) 1959{ 1960 struct cfiscsi_target *ct; 1961 struct ctl_port *port; 1962 const char *target, *alias, *tag; 1963 struct scsi_vpd_id_descriptor *desc; 1964 ctl_options_t opts; 1965 int retval, len, idlen; 1966 1967 ctl_init_opts(&opts, req->num_args, req->kern_args); 1968 target = ctl_get_opt(&opts, "cfiscsi_target"); 1969 alias = ctl_get_opt(&opts, "cfiscsi_target_alias"); 1970 tag = ctl_get_opt(&opts, "cfiscsi_portal_group_tag"); 1971 if (target == NULL || tag == NULL) { 1972 req->status = CTL_LUN_ERROR; 1973 snprintf(req->error_str, sizeof(req->error_str), 1974 "Missing required argument"); 1975 ctl_free_opts(&opts); 1976 return; 1977 } 1978 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias); 1979 if (ct == NULL) { 1980 req->status = CTL_LUN_ERROR; 1981 snprintf(req->error_str, sizeof(req->error_str), 1982 "failed to create target \"%s\"", target); 1983 ctl_free_opts(&opts); 1984 return; 1985 } 1986 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 1987 req->status = CTL_LUN_ERROR; 1988 snprintf(req->error_str, sizeof(req->error_str), 1989 "target \"%s\" already exist", target); 1990 cfiscsi_target_release(ct); 1991 ctl_free_opts(&opts); 1992 return; 1993 } 1994 port = &ct->ct_port; 1995 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 1996 goto done; 1997 1998 port->frontend = &cfiscsi_frontend; 1999 port->port_type = CTL_PORT_ISCSI; 2000 /* XXX KDM what should the real number be here? */ 2001 port->num_requested_ctl_io = 4096; 2002 port->port_name = "iscsi"; 2003 port->physical_port = strtoul(tag, NULL, 0); 2004 port->virtual_port = ct->ct_target_id; 2005 port->port_online = cfiscsi_online; 2006 port->port_offline = cfiscsi_offline; 2007 port->port_info = cfiscsi_info; 2008 port->onoff_arg = ct; 2009 port->lun_enable = cfiscsi_lun_enable; 2010 port->lun_disable = cfiscsi_lun_disable; 2011 port->lun_map = cfiscsi_lun_map; 2012 port->targ_lun_arg = ct; 2013 port->fe_datamove = cfiscsi_datamove; 2014 port->fe_done = cfiscsi_done; 2015 2016 /* XXX KDM what should we report here? */ 2017 /* XXX These should probably be fetched from CTL. */ 2018 port->max_targets = 1; 2019 port->max_target_id = 15; 2020 2021 port->options = opts; 2022 STAILQ_INIT(&opts); 2023 2024 /* Generate Port ID. */ 2025 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2026 idlen = roundup2(idlen, 4); 2027 len = sizeof(struct scsi_vpd_device_id) + idlen; 2028 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2029 M_CTL, M_WAITOK | M_ZERO); 2030 port->port_devid->len = len; 2031 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2032 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2033 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2034 SVPD_ID_TYPE_SCSI_NAME; 2035 desc->length = idlen; 2036 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", 2037 target, port->physical_port); 2038 2039 /* Generate Target ID. */ 2040 idlen = strlen(target) + 1; 2041 idlen = roundup2(idlen, 4); 2042 len = sizeof(struct scsi_vpd_device_id) + idlen; 2043 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2044 M_CTL, M_WAITOK | M_ZERO); 2045 port->target_devid->len = len; 2046 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2047 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2048 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2049 SVPD_ID_TYPE_SCSI_NAME; 2050 desc->length = idlen; 2051 strlcpy(desc->identifier, target, idlen); 2052 2053 retval = ctl_port_register(port, /*master_SC*/ 1); 2054 if (retval != 0) { 2055 ctl_free_opts(&port->options); 2056 cfiscsi_target_release(ct); 2057 free(port->port_devid, M_CFISCSI); 2058 free(port->target_devid, M_CFISCSI); 2059 req->status = CTL_LUN_ERROR; 2060 snprintf(req->error_str, sizeof(req->error_str), 2061 "ctl_frontend_register() failed with error %d", retval); 2062 return; 2063 } 2064done: 2065 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2066 req->status = CTL_LUN_OK; 2067 memcpy(req->kern_args[0].kvalue, &port->targ_port, 2068 sizeof(port->targ_port)); //XXX 2069} 2070 2071static void 2072cfiscsi_ioctl_port_remove(struct ctl_req *req) 2073{ 2074 struct cfiscsi_target *ct; 2075 const char *target; 2076 ctl_options_t opts; 2077 2078 ctl_init_opts(&opts, req->num_args, req->kern_args); 2079 target = ctl_get_opt(&opts, "cfiscsi_target"); 2080 if (target == NULL) { 2081 ctl_free_opts(&opts); 2082 req->status = CTL_LUN_ERROR; 2083 snprintf(req->error_str, sizeof(req->error_str), 2084 "Missing required argument"); 2085 return; 2086 } 2087 ct = cfiscsi_target_find(&cfiscsi_softc, target); 2088 if (ct == NULL) { 2089 ctl_free_opts(&opts); 2090 req->status = CTL_LUN_ERROR; 2091 snprintf(req->error_str, sizeof(req->error_str), 2092 "can't find target \"%s\"", target); 2093 return; 2094 } 2095 if (ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) { 2096 ctl_free_opts(&opts); 2097 req->status = CTL_LUN_ERROR; 2098 snprintf(req->error_str, sizeof(req->error_str), 2099 "target \"%s\" is already dying", target); 2100 return; 2101 } 2102 ctl_free_opts(&opts); 2103 2104 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2105 ctl_port_offline(&ct->ct_port); 2106 cfiscsi_target_release(ct); 2107 cfiscsi_target_release(ct); 2108} 2109 2110static int 2111cfiscsi_ioctl(struct cdev *dev, 2112 u_long cmd, caddr_t addr, int flag, struct thread *td) 2113{ 2114 struct ctl_iscsi *ci; 2115 struct ctl_req *req; 2116 2117 if (cmd == CTL_PORT_REQ) { 2118 req = (struct ctl_req *)addr; 2119 switch (req->reqtype) { 2120 case CTL_REQ_CREATE: 2121 cfiscsi_ioctl_port_create(req); 2122 break; 2123 case CTL_REQ_REMOVE: 2124 cfiscsi_ioctl_port_remove(req); 2125 break; 2126 default: 2127 req->status = CTL_LUN_ERROR; 2128 snprintf(req->error_str, sizeof(req->error_str), 2129 "Unsupported request type %d", req->reqtype); 2130 } 2131 return (0); 2132 } 2133 2134 if (cmd != CTL_ISCSI) 2135 return (ENOTTY); 2136 2137 ci = (struct ctl_iscsi *)addr; 2138 switch (ci->type) { 2139 case CTL_ISCSI_HANDOFF: 2140 cfiscsi_ioctl_handoff(ci); 2141 break; 2142 case CTL_ISCSI_LIST: 2143 cfiscsi_ioctl_list(ci); 2144 break; 2145 case CTL_ISCSI_TERMINATE: 2146 cfiscsi_ioctl_terminate(ci); 2147 break; 2148 case CTL_ISCSI_LOGOUT: 2149 cfiscsi_ioctl_logout(ci); 2150 break; 2151#ifdef ICL_KERNEL_PROXY 2152 case CTL_ISCSI_LISTEN: 2153 cfiscsi_ioctl_listen(ci); 2154 break; 2155 case CTL_ISCSI_ACCEPT: 2156 cfiscsi_ioctl_accept(ci); 2157 break; 2158 case CTL_ISCSI_SEND: 2159 cfiscsi_ioctl_send(ci); 2160 break; 2161 case CTL_ISCSI_RECEIVE: 2162 cfiscsi_ioctl_receive(ci); 2163 break; 2164#else 2165 case CTL_ISCSI_LISTEN: 2166 case CTL_ISCSI_ACCEPT: 2167 case CTL_ISCSI_SEND: 2168 case CTL_ISCSI_RECEIVE: 2169 ci->status = CTL_ISCSI_ERROR; 2170 snprintf(ci->error_str, sizeof(ci->error_str), 2171 "%s: CTL compiled without ICL_KERNEL_PROXY", 2172 __func__); 2173 break; 2174#endif /* !ICL_KERNEL_PROXY */ 2175 default: 2176 ci->status = CTL_ISCSI_ERROR; 2177 snprintf(ci->error_str, sizeof(ci->error_str), 2178 "%s: invalid iSCSI request type %d", __func__, ci->type); 2179 break; 2180 } 2181 2182 return (0); 2183} 2184 2185static void 2186cfiscsi_target_hold(struct cfiscsi_target *ct) 2187{ 2188 2189 refcount_acquire(&ct->ct_refcount); 2190} 2191 2192static void 2193cfiscsi_target_release(struct cfiscsi_target *ct) 2194{ 2195 struct cfiscsi_softc *softc; 2196 2197 softc = ct->ct_softc; 2198 mtx_lock(&softc->lock); 2199 if (refcount_release(&ct->ct_refcount)) { 2200 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2201 mtx_unlock(&softc->lock); 2202 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2203 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2204 if (ctl_port_deregister(&ct->ct_port) != 0) 2205 printf("%s: ctl_port_deregister() failed\n", 2206 __func__); 2207 } 2208 free(ct, M_CFISCSI); 2209 2210 return; 2211 } 2212 mtx_unlock(&softc->lock); 2213} 2214 2215static struct cfiscsi_target * 2216cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name) 2217{ 2218 struct cfiscsi_target *ct; 2219 2220 mtx_lock(&softc->lock); 2221 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2222 if (strcmp(name, ct->ct_name) != 0 || 2223 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2224 continue; 2225 cfiscsi_target_hold(ct); 2226 mtx_unlock(&softc->lock); 2227 return (ct); 2228 } 2229 mtx_unlock(&softc->lock); 2230 2231 return (NULL); 2232} 2233 2234static struct cfiscsi_target * 2235cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2236 const char *alias) 2237{ 2238 struct cfiscsi_target *ct, *newct; 2239 int i; 2240 2241 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2242 return (NULL); 2243 2244 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2245 2246 mtx_lock(&softc->lock); 2247 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2248 if (strcmp(name, ct->ct_name) != 0 || 2249 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2250 continue; 2251 cfiscsi_target_hold(ct); 2252 mtx_unlock(&softc->lock); 2253 free(newct, M_CFISCSI); 2254 return (ct); 2255 } 2256 2257 for (i = 0; i < CTL_MAX_LUNS; i++) 2258 newct->ct_luns[i] = UINT32_MAX; 2259 2260 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2261 if (alias != NULL) 2262 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2263 refcount_init(&newct->ct_refcount, 1); 2264 newct->ct_softc = softc; 2265 if (TAILQ_EMPTY(&softc->targets)) 2266 softc->last_target_id = 0; 2267 newct->ct_target_id = ++softc->last_target_id; 2268 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2269 mtx_unlock(&softc->lock); 2270 2271 return (newct); 2272} 2273 2274/* 2275 * Takes LUN from the target space and returns LUN from the CTL space. 2276 */ 2277static uint32_t 2278cfiscsi_lun_map(void *arg, uint32_t lun) 2279{ 2280 struct cfiscsi_target *ct = arg; 2281 2282 if (lun >= CTL_MAX_LUNS) { 2283 CFISCSI_DEBUG("requested lun number %d is higher " 2284 "than maximum %d", lun, CTL_MAX_LUNS - 1); 2285 return (UINT32_MAX); 2286 } 2287 return (ct->ct_luns[lun]); 2288} 2289 2290static int 2291cfiscsi_target_set_lun(struct cfiscsi_target *ct, 2292 unsigned long lun_id, unsigned long ctl_lun_id) 2293{ 2294 2295 if (lun_id >= CTL_MAX_LUNS) { 2296 CFISCSI_WARN("requested lun number %ld is higher " 2297 "than maximum %d", lun_id, CTL_MAX_LUNS - 1); 2298 return (-1); 2299 } 2300 2301 if (ct->ct_luns[lun_id] < CTL_MAX_LUNS) { 2302 /* 2303 * CTL calls cfiscsi_lun_enable() twice for each LUN - once 2304 * when the LUN is created, and a second time just before 2305 * the port is brought online; don't emit warnings 2306 * for that case. 2307 */ 2308 if (ct->ct_luns[lun_id] == ctl_lun_id) 2309 return (0); 2310 CFISCSI_WARN("lun %ld already allocated", lun_id); 2311 return (-1); 2312 } 2313 2314#if 0 2315 CFISCSI_DEBUG("adding mapping for lun %ld, target %s " 2316 "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id); 2317#endif 2318 2319 ct->ct_luns[lun_id] = ctl_lun_id; 2320 2321 return (0); 2322} 2323 2324static int 2325cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id) 2326{ 2327 struct cfiscsi_softc *softc; 2328 struct cfiscsi_target *ct; 2329 const char *target = NULL; 2330 const char *lun = NULL; 2331 unsigned long tmp; 2332 2333 ct = (struct cfiscsi_target *)arg; 2334 softc = ct->ct_softc; 2335 2336 target = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2337 "cfiscsi_target"); 2338 lun = ctl_get_opt(&control_softc->ctl_luns[lun_id]->be_lun->options, 2339 "cfiscsi_lun"); 2340 2341 if (target == NULL && lun == NULL) 2342 return (0); 2343 2344 if (target == NULL || lun == NULL) { 2345 CFISCSI_WARN("lun added with cfiscsi_target, but without " 2346 "cfiscsi_lun, or the other way around; ignoring"); 2347 return (0); 2348 } 2349 2350 if (strcmp(target, ct->ct_name) != 0) 2351 return (0); 2352 2353 tmp = strtoul(lun, NULL, 10); 2354 cfiscsi_target_set_lun(ct, tmp, lun_id); 2355 return (0); 2356} 2357 2358static int 2359cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id) 2360{ 2361 struct cfiscsi_softc *softc; 2362 struct cfiscsi_target *ct; 2363 int i; 2364 2365 ct = (struct cfiscsi_target *)arg; 2366 softc = ct->ct_softc; 2367 2368 mtx_lock(&softc->lock); 2369 for (i = 0; i < CTL_MAX_LUNS; i++) { 2370 if (ct->ct_luns[i] != lun_id) 2371 continue; 2372 ct->ct_luns[i] = UINT32_MAX; 2373 break; 2374 } 2375 mtx_unlock(&softc->lock); 2376 return (0); 2377} 2378 2379static void 2380cfiscsi_datamove_in(union ctl_io *io) 2381{ 2382 struct cfiscsi_session *cs; 2383 struct icl_pdu *request, *response; 2384 const struct iscsi_bhs_scsi_command *bhssc; 2385 struct iscsi_bhs_data_in *bhsdi; 2386 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2387 size_t len, expected_len, sg_len, buffer_offset; 2388 const char *sg_addr; 2389 int ctl_sg_count, error, i; 2390 2391 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2392 cs = PDU_SESSION(request); 2393 2394 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2395 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2396 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2397 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2398 2399 if (io->scsiio.kern_sg_entries > 0) { 2400 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2401 ctl_sg_count = io->scsiio.kern_sg_entries; 2402 } else { 2403 ctl_sglist = &ctl_sg_entry; 2404 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2405 ctl_sglist->len = io->scsiio.kern_data_len; 2406 ctl_sg_count = 1; 2407 } 2408 2409 /* 2410 * This is the total amount of data to be transferred within the current 2411 * SCSI command. We need to record it so that we can properly report 2412 * underflow/underflow. 2413 */ 2414 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2415 2416 /* 2417 * This is the offset within the current SCSI command; for the first 2418 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2419 * it will be the sum of lengths of previous ones. 2420 */ 2421 buffer_offset = io->scsiio.kern_rel_offset; 2422 2423 /* 2424 * This is the transfer length expected by the initiator. In theory, 2425 * it could be different from the correct amount of data from the SCSI 2426 * point of view, even if that doesn't make any sense. 2427 */ 2428 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2429#if 0 2430 if (expected_len != io->scsiio.kern_total_len) { 2431 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, " 2432 "actual length %zd", expected_len, 2433 (size_t)io->scsiio.kern_total_len); 2434 } 2435#endif 2436 2437 if (buffer_offset >= expected_len) { 2438#if 0 2439 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2440 "already sent the expected len", buffer_offset); 2441#endif 2442 io->scsiio.be_move_done(io); 2443 return; 2444 } 2445 2446 i = 0; 2447 sg_addr = NULL; 2448 sg_len = 0; 2449 response = NULL; 2450 bhsdi = NULL; 2451 for (;;) { 2452 if (response == NULL) { 2453 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2454 if (response == NULL) { 2455 CFISCSI_SESSION_WARN(cs, "failed to " 2456 "allocate memory; dropping connection"); 2457 ctl_set_busy(&io->scsiio); 2458 io->scsiio.be_move_done(io); 2459 cfiscsi_session_terminate(cs); 2460 return; 2461 } 2462 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2463 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2464 bhsdi->bhsdi_initiator_task_tag = 2465 bhssc->bhssc_initiator_task_tag; 2466 bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request)); 2467 PDU_EXPDATASN(request)++; 2468 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2469 } 2470 2471 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2472 if (sg_len == 0) { 2473 sg_addr = ctl_sglist[i].addr; 2474 sg_len = ctl_sglist[i].len; 2475 KASSERT(sg_len > 0, ("sg_len <= 0")); 2476 } 2477 2478 len = sg_len; 2479 2480 /* 2481 * Truncate to maximum data segment length. 2482 */ 2483 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length, 2484 ("ip_data_len %zd >= max_data_segment_length %zd", 2485 response->ip_data_len, cs->cs_max_data_segment_length)); 2486 if (response->ip_data_len + len > 2487 cs->cs_max_data_segment_length) { 2488 len = cs->cs_max_data_segment_length - 2489 response->ip_data_len; 2490 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2491 len, sg_len)); 2492 } 2493 2494 /* 2495 * Truncate to expected data transfer length. 2496 */ 2497 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2498 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2499 buffer_offset, response->ip_data_len, expected_len)); 2500 if (buffer_offset + response->ip_data_len + len > expected_len) { 2501 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2502 "to expected data transfer length %zd", 2503 buffer_offset + response->ip_data_len + len, expected_len); 2504 len = expected_len - (buffer_offset + response->ip_data_len); 2505 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2506 len, sg_len)); 2507 } 2508 2509 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT); 2510 if (error != 0) { 2511 CFISCSI_SESSION_WARN(cs, "failed to " 2512 "allocate memory; dropping connection"); 2513 icl_pdu_free(response); 2514 ctl_set_busy(&io->scsiio); 2515 io->scsiio.be_move_done(io); 2516 cfiscsi_session_terminate(cs); 2517 return; 2518 } 2519 sg_addr += len; 2520 sg_len -= len; 2521 2522 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2523 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2524 buffer_offset, response->ip_data_len, expected_len)); 2525 if (buffer_offset + response->ip_data_len == expected_len) { 2526 /* 2527 * Already have the amount of data the initiator wanted. 2528 */ 2529 break; 2530 } 2531 2532 if (sg_len == 0) { 2533 /* 2534 * End of scatter-gather segment; 2535 * proceed to the next one... 2536 */ 2537 if (i == ctl_sg_count - 1) { 2538 /* 2539 * ... unless this was the last one. 2540 */ 2541 break; 2542 } 2543 i++; 2544 } 2545 2546 if (response->ip_data_len == cs->cs_max_data_segment_length) { 2547 /* 2548 * Can't stuff more data into the current PDU; 2549 * queue it. Note that's not enough to check 2550 * for kern_data_resid == 0 instead; there 2551 * may be several Data-In PDUs for the final 2552 * call to cfiscsi_datamove(), and we want 2553 * to set the F flag only on the last of them. 2554 */ 2555 buffer_offset += response->ip_data_len; 2556 if (buffer_offset == io->scsiio.kern_total_len || 2557 buffer_offset == expected_len) 2558 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2559 cfiscsi_pdu_queue(response); 2560 response = NULL; 2561 bhsdi = NULL; 2562 } 2563 } 2564 if (response != NULL) { 2565 buffer_offset += response->ip_data_len; 2566 if (buffer_offset == io->scsiio.kern_total_len || 2567 buffer_offset == expected_len) 2568 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2569 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2570 cfiscsi_pdu_queue(response); 2571 } 2572 2573 io->scsiio.be_move_done(io); 2574} 2575 2576static void 2577cfiscsi_datamove_out(union ctl_io *io) 2578{ 2579 struct cfiscsi_session *cs; 2580 struct icl_pdu *request, *response; 2581 const struct iscsi_bhs_scsi_command *bhssc; 2582 struct iscsi_bhs_r2t *bhsr2t; 2583 struct cfiscsi_data_wait *cdw; 2584 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2585 uint32_t expected_len, r2t_off, r2t_len; 2586 uint32_t target_transfer_tag; 2587 bool done; 2588 2589 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2590 cs = PDU_SESSION(request); 2591 2592 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2593 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2594 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2595 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2596 2597 /* 2598 * We need to record it so that we can properly report 2599 * underflow/underflow. 2600 */ 2601 PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len; 2602 2603 /* 2604 * Report write underflow as error since CTL and backends don't 2605 * really support it, and SCSI does not tell how to do it right. 2606 */ 2607 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2608 if (io->scsiio.kern_rel_offset + io->scsiio.kern_data_len > 2609 expected_len) { 2610 io->scsiio.io_hdr.port_status = 43; 2611 io->scsiio.be_move_done(io); 2612 return; 2613 } 2614 2615 target_transfer_tag = 2616 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2617 2618#if 0 2619 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2620 "task tag 0x%x, target transfer tag 0x%x", 2621 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2622#endif 2623 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 2624 if (cdw == NULL) { 2625 CFISCSI_SESSION_WARN(cs, "failed to " 2626 "allocate memory; dropping connection"); 2627 ctl_set_busy(&io->scsiio); 2628 io->scsiio.be_move_done(io); 2629 cfiscsi_session_terminate(cs); 2630 return; 2631 } 2632 cdw->cdw_ctl_io = io; 2633 cdw->cdw_target_transfer_tag = target_transfer_tag; 2634 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2635 cdw->cdw_r2t_end = io->scsiio.kern_data_len; 2636 2637 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2638 if (io->scsiio.kern_sg_entries > 0) { 2639 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2640 } else { 2641 ctl_sglist = &ctl_sg_entry; 2642 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2643 ctl_sglist->len = io->scsiio.kern_data_len; 2644 } 2645 cdw->cdw_sg_index = 0; 2646 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2647 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2648 r2t_off = io->scsiio.ext_data_filled; 2649 while (r2t_off > 0) { 2650 if (r2t_off >= cdw->cdw_sg_len) { 2651 r2t_off -= cdw->cdw_sg_len; 2652 cdw->cdw_sg_index++; 2653 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2654 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2655 continue; 2656 } 2657 cdw->cdw_sg_addr += r2t_off; 2658 cdw->cdw_sg_len -= r2t_off; 2659 r2t_off = 0; 2660 } 2661 2662 if (cs->cs_immediate_data && 2663 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2664 icl_pdu_data_segment_length(request)) { 2665 done = cfiscsi_handle_data_segment(request, cdw); 2666 if (done) { 2667 uma_zfree(cfiscsi_data_wait_zone, cdw); 2668 io->scsiio.be_move_done(io); 2669 return; 2670 } 2671 } 2672 2673 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2674 r2t_len = MIN(io->scsiio.kern_data_len - io->scsiio.ext_data_filled, 2675 cs->cs_max_burst_length); 2676 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2677 2678 CFISCSI_SESSION_LOCK(cs); 2679 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2680 CFISCSI_SESSION_UNLOCK(cs); 2681 2682 /* 2683 * XXX: We should limit the number of outstanding R2T PDUs 2684 * per task to MaxOutstandingR2T. 2685 */ 2686 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2687 if (response == NULL) { 2688 CFISCSI_SESSION_WARN(cs, "failed to " 2689 "allocate memory; dropping connection"); 2690 ctl_set_busy(&io->scsiio); 2691 io->scsiio.be_move_done(io); 2692 cfiscsi_session_terminate(cs); 2693 return; 2694 } 2695 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2696 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2697 bhsr2t->bhsr2t_flags = 0x80; 2698 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2699 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2700 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2701 /* 2702 * XXX: Here we assume that cfiscsi_datamove() won't ever 2703 * be running concurrently on several CPUs for a given 2704 * command. 2705 */ 2706 bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request)); 2707 PDU_R2TSN(request)++; 2708 /* 2709 * This is the offset within the current SCSI command; 2710 * i.e. for the first call of datamove(), it will be 0, 2711 * and for subsequent ones it will be the sum of lengths 2712 * of previous ones. 2713 * 2714 * The ext_data_filled is to account for unsolicited 2715 * (immediate) data that might have already arrived. 2716 */ 2717 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2718 /* 2719 * This is the total length (sum of S/G lengths) this call 2720 * to cfiscsi_datamove() is supposed to handle, limited by 2721 * MaxBurstLength. 2722 */ 2723 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2724 cfiscsi_pdu_queue(response); 2725} 2726 2727static void 2728cfiscsi_datamove(union ctl_io *io) 2729{ 2730 2731 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2732 cfiscsi_datamove_in(io); 2733 else { 2734 /* We hadn't received anything during this datamove yet. */ 2735 io->scsiio.ext_data_filled = 0; 2736 cfiscsi_datamove_out(io); 2737 } 2738} 2739 2740static void 2741cfiscsi_scsi_command_done(union ctl_io *io) 2742{ 2743 struct icl_pdu *request, *response; 2744 struct iscsi_bhs_scsi_command *bhssc; 2745 struct iscsi_bhs_scsi_response *bhssr; 2746#ifdef DIAGNOSTIC 2747 struct cfiscsi_data_wait *cdw; 2748#endif 2749 struct cfiscsi_session *cs; 2750 uint16_t sense_length; 2751 2752 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2753 cs = PDU_SESSION(request); 2754 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2755 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2756 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2757 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2758 2759 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2760 // bhssc->bhssc_initiator_task_tag); 2761 2762#ifdef DIAGNOSTIC 2763 CFISCSI_SESSION_LOCK(cs); 2764 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2765 KASSERT(bhssc->bhssc_initiator_task_tag != 2766 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2767 CFISCSI_SESSION_UNLOCK(cs); 2768#endif 2769 2770 /* 2771 * Do not return status for aborted commands. 2772 * There are exceptions, but none supported by CTL yet. 2773 */ 2774 if ((io->io_hdr.flags & CTL_FLAG_ABORT) && 2775 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) { 2776 ctl_free_io(io); 2777 icl_pdu_free(request); 2778 return; 2779 } 2780 2781 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2782 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2783 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2784 bhssr->bhssr_flags = 0x80; 2785 /* 2786 * XXX: We don't deal with bidirectional under/overflows; 2787 * does anything actually support those? 2788 */ 2789 if (PDU_TOTAL_TRANSFER_LEN(request) < 2790 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2791 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2792 bhssr->bhssr_residual_count = 2793 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2794 PDU_TOTAL_TRANSFER_LEN(request)); 2795 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2796 // ntohl(bhssr->bhssr_residual_count)); 2797 } else if (PDU_TOTAL_TRANSFER_LEN(request) > 2798 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2799 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2800 bhssr->bhssr_residual_count = 2801 htonl(PDU_TOTAL_TRANSFER_LEN(request) - 2802 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2803 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2804 // ntohl(bhssr->bhssr_residual_count)); 2805 } 2806 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2807 bhssr->bhssr_status = io->scsiio.scsi_status; 2808 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2809 bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request)); 2810 2811 if (io->scsiio.sense_len > 0) { 2812#if 0 2813 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2814 io->scsiio.sense_len); 2815#endif 2816 sense_length = htons(io->scsiio.sense_len); 2817 icl_pdu_append_data(response, 2818 &sense_length, sizeof(sense_length), M_WAITOK); 2819 icl_pdu_append_data(response, 2820 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2821 } 2822 2823 ctl_free_io(io); 2824 icl_pdu_free(request); 2825 cfiscsi_pdu_queue(response); 2826} 2827 2828static void 2829cfiscsi_task_management_done(union ctl_io *io) 2830{ 2831 struct icl_pdu *request, *response; 2832 struct iscsi_bhs_task_management_request *bhstmr; 2833 struct iscsi_bhs_task_management_response *bhstmr2; 2834 struct cfiscsi_data_wait *cdw, *tmpcdw; 2835 struct cfiscsi_session *cs; 2836 2837 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2838 cs = PDU_SESSION(request); 2839 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2840 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2841 ISCSI_BHS_OPCODE_TASK_REQUEST, 2842 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2843 2844#if 0 2845 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2846 bhstmr->bhstmr_initiator_task_tag, 2847 bhstmr->bhstmr_referenced_task_tag); 2848#endif 2849 2850 if ((bhstmr->bhstmr_function & ~0x80) == 2851 BHSTMR_FUNCTION_ABORT_TASK) { 2852 /* 2853 * Make sure we no longer wait for Data-Out for this command. 2854 */ 2855 CFISCSI_SESSION_LOCK(cs); 2856 TAILQ_FOREACH_SAFE(cdw, 2857 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2858 if (bhstmr->bhstmr_referenced_task_tag != 2859 cdw->cdw_initiator_task_tag) 2860 continue; 2861 2862#if 0 2863 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2864 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2865#endif 2866 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2867 cdw, cdw_next); 2868 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2869 uma_zfree(cfiscsi_data_wait_zone, cdw); 2870 } 2871 CFISCSI_SESSION_UNLOCK(cs); 2872 } 2873 2874 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2875 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2876 response->ip_bhs; 2877 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2878 bhstmr2->bhstmr_flags = 0x80; 2879 if (io->io_hdr.status == CTL_SUCCESS) { 2880 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2881 } else { 2882 /* 2883 * XXX: How to figure out what exactly went wrong? iSCSI spec 2884 * expects us to provide detailed error, e.g. "Task does 2885 * not exist" or "LUN does not exist". 2886 */ 2887 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED"); 2888 bhstmr2->bhstmr_response = 2889 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2890 } 2891 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2892 2893 ctl_free_io(io); 2894 icl_pdu_free(request); 2895 cfiscsi_pdu_queue(response); 2896} 2897 2898static void 2899cfiscsi_done(union ctl_io *io) 2900{ 2901 struct icl_pdu *request; 2902 struct cfiscsi_session *cs; 2903 2904 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 2905 ("invalid CTL status %#x", io->io_hdr.status)); 2906 2907 if (io->io_hdr.io_type == CTL_IO_TASK && 2908 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 2909 /* 2910 * Implicit task termination has just completed; nothing to do. 2911 */ 2912 cs = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2913 cs->cs_tasks_aborted = true; 2914 refcount_release(&cs->cs_outstanding_ctl_pdus); 2915 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 2916 ctl_free_io(io); 2917 return; 2918 } 2919 2920 request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr; 2921 cs = PDU_SESSION(request); 2922 refcount_release(&cs->cs_outstanding_ctl_pdus); 2923 2924 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 2925 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 2926 cfiscsi_scsi_command_done(io); 2927 break; 2928 case ISCSI_BHS_OPCODE_TASK_REQUEST: 2929 cfiscsi_task_management_done(io); 2930 break; 2931 default: 2932 panic("cfiscsi_done called with wrong opcode 0x%x", 2933 request->ip_bhs->bhs_opcode); 2934 } 2935} 2936