1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 The FreeBSD Foundation 5 * 6 * This software was developed by Edward Tomasz Napierala under sponsorship 7 * from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 /* 34 * CTL frontend for the iSCSI protocol. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/capsicum.h> 42 #include <sys/condvar.h> 43 #include <sys/endian.h> 44 #include <sys/file.h> 45 #include <sys/kernel.h> 46 #include <sys/kthread.h> 47 #include <sys/lock.h> 48 #include <sys/malloc.h> 49 #include <sys/module.h> 50 #include <sys/mutex.h> 51 #include <sys/queue.h> 52 #include <sys/sbuf.h> 53 #include <sys/socket.h> 54 #include <sys/sysctl.h> 55 #include <sys/systm.h> 56 #include <sys/uio.h> 57 #include <sys/unistd.h> 58 #include <sys/nv.h> 59 #include <sys/dnv.h> 60 #include <vm/uma.h> 61 62 #include <cam/scsi/scsi_all.h> 63 #include <cam/scsi/scsi_da.h> 64 #include <cam/ctl/ctl_io.h> 65 #include <cam/ctl/ctl.h> 66 #include <cam/ctl/ctl_backend.h> 67 #include <cam/ctl/ctl_error.h> 68 #include <cam/ctl/ctl_frontend.h> 69 #include <cam/ctl/ctl_debug.h> 70 #include <cam/ctl/ctl_ha.h> 71 #include <cam/ctl/ctl_ioctl.h> 72 #include <cam/ctl/ctl_private.h> 73 74 #include <dev/iscsi/icl.h> 75 #include <dev/iscsi/icl_wrappers.h> 76 #include <dev/iscsi/iscsi_proto.h> 77 #include <cam/ctl/ctl_frontend_iscsi.h> 78 79 #ifdef ICL_KERNEL_PROXY 80 #include <sys/socketvar.h> 81 #endif 82 83 #ifdef ICL_KERNEL_PROXY 84 FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 85 #endif 86 87 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 88 static uma_zone_t cfiscsi_data_wait_zone; 89 90 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 91 "CAM Target Layer iSCSI Frontend"); 92 static int debug = 1; 93 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 94 &debug, 1, "Enable debug messages"); 95 static int ping_timeout = 5; 96 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 97 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 98 static int login_timeout = 60; 99 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 100 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 101 static int maxtags = 256; 102 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxtags, CTLFLAG_RWTUN, 103 &maxtags, 0, "Max number of requests queued by initiator"); 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) 145 146 struct cfiscsi_priv { 147 void *request; 148 uint32_t expdatasn; 149 uint32_t r2tsn; 150 }; 151 #define PRIV(io) \ 152 ((struct cfiscsi_priv *)&(io)->io_hdr.ctl_private[CTL_PRIV_FRONTEND]) 153 #define PRIV_REQUEST(io) PRIV(io)->request 154 #define PRIV_EXPDATASN(io) PRIV(io)->expdatasn 155 #define PRIV_R2TSN(io) PRIV(io)->r2tsn 156 157 static int cfiscsi_init(void); 158 static int cfiscsi_shutdown(void); 159 static void cfiscsi_online(void *arg); 160 static void cfiscsi_offline(void *arg); 161 static int cfiscsi_info(void *arg, struct sbuf *sb); 162 static int cfiscsi_ioctl(struct cdev *dev, 163 u_long cmd, caddr_t addr, int flag, struct thread *td); 164 static void cfiscsi_datamove(union ctl_io *io); 165 static void cfiscsi_datamove_in(union ctl_io *io); 166 static void cfiscsi_datamove_out(union ctl_io *io); 167 static void cfiscsi_done(union ctl_io *io); 168 static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 169 static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 170 static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 171 static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 172 static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 173 static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 174 static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 175 static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 176 struct cfiscsi_session *cs, union ctl_io *io, 177 uint32_t initiator_task_tag, 178 uint32_t *target_transfer_tagp); 179 static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 180 struct cfiscsi_data_wait *cdw); 181 static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 182 *softc, const char *name, uint16_t tag); 183 static struct cfiscsi_target *cfiscsi_target_find_or_create( 184 struct cfiscsi_softc *softc, const char *name, const char *alias, 185 uint16_t tag); 186 static void cfiscsi_target_release(struct cfiscsi_target *ct); 187 static void cfiscsi_session_delete(struct cfiscsi_session *cs); 188 189 static struct cfiscsi_softc cfiscsi_softc; 190 191 static struct ctl_frontend cfiscsi_frontend = 192 { 193 .name = "iscsi", 194 .init = cfiscsi_init, 195 .ioctl = cfiscsi_ioctl, 196 .shutdown = cfiscsi_shutdown, 197 }; 198 CTL_FRONTEND_DECLARE(cfiscsi, cfiscsi_frontend); 199 MODULE_DEPEND(cfiscsi, icl, 1, 1, 1); 200 201 static struct icl_pdu * 202 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 203 { 204 205 return (icl_pdu_new(request->ip_conn, flags)); 206 } 207 208 static bool 209 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 210 { 211 const struct iscsi_bhs_scsi_command *bhssc; 212 struct cfiscsi_session *cs; 213 uint32_t cmdsn, curcmdsn; 214 215 cs = PDU_SESSION(request); 216 217 /* 218 * Every incoming PDU - not just NOP-Out - resets the ping timer. 219 * The purpose of the timeout is to reset the connection when it stalls; 220 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 221 * in some queue. 222 */ 223 cs->cs_timeout = 0; 224 225 /* 226 * Immediate commands carry cmdsn, but it is neither incremented nor 227 * verified. 228 */ 229 if (request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) 230 return (false); 231 232 /* 233 * Data-Out PDUs don't contain CmdSN. 234 */ 235 if (request->ip_bhs->bhs_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 236 return (false); 237 238 /* 239 * We're only using fields common for all the request 240 * (initiator -> target) PDUs. 241 */ 242 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 243 curcmdsn = cmdsn = ntohl(bhssc->bhssc_cmdsn); 244 245 /* 246 * Increment session cmdsn and exit if we received the expected value. 247 */ 248 do { 249 if (atomic_fcmpset_32(&cs->cs_cmdsn, &curcmdsn, cmdsn + 1)) 250 return (false); 251 } while (curcmdsn == cmdsn); 252 253 /* 254 * The target MUST silently ignore any non-immediate command outside 255 * of this range. 256 */ 257 if (ISCSI_SNLT(cmdsn, curcmdsn) || 258 ISCSI_SNGT(cmdsn, curcmdsn - 1 + maxtags)) { 259 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 260 "while expected %u", cmdsn, curcmdsn); 261 return (true); 262 } 263 264 /* 265 * We don't support multiple connections now, so any discontinuity in 266 * CmdSN means lost PDUs. Since we don't support PDU retransmission -- 267 * terminate the connection. 268 */ 269 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 270 "while expected %u; dropping connection", 271 cmdsn, curcmdsn); 272 cfiscsi_session_terminate(cs); 273 return (true); 274 } 275 276 static void 277 cfiscsi_pdu_handle(struct icl_pdu *request) 278 { 279 struct cfiscsi_session *cs; 280 bool ignore; 281 282 cs = PDU_SESSION(request); 283 284 ignore = cfiscsi_pdu_update_cmdsn(request); 285 if (ignore) { 286 icl_pdu_free(request); 287 return; 288 } 289 290 /* 291 * Handle the PDU; this includes e.g. receiving the remaining 292 * part of PDU and submitting the SCSI command to CTL 293 * or queueing a reply. The handling routine is responsible 294 * for freeing the PDU when it's no longer needed. 295 */ 296 switch (request->ip_bhs->bhs_opcode & 297 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 298 case ISCSI_BHS_OPCODE_NOP_OUT: 299 cfiscsi_pdu_handle_nop_out(request); 300 break; 301 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 302 cfiscsi_pdu_handle_scsi_command(request); 303 break; 304 case ISCSI_BHS_OPCODE_TASK_REQUEST: 305 cfiscsi_pdu_handle_task_request(request); 306 break; 307 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 308 cfiscsi_pdu_handle_data_out(request); 309 break; 310 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 311 cfiscsi_pdu_handle_logout_request(request); 312 break; 313 default: 314 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 315 "opcode 0x%x; dropping connection", 316 request->ip_bhs->bhs_opcode); 317 icl_pdu_free(request); 318 cfiscsi_session_terminate(cs); 319 } 320 321 } 322 323 static void 324 cfiscsi_receive_callback(struct icl_pdu *request) 325 { 326 #ifdef ICL_KERNEL_PROXY 327 struct cfiscsi_session *cs; 328 329 cs = PDU_SESSION(request); 330 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 331 if (cs->cs_login_pdu == NULL) 332 cs->cs_login_pdu = request; 333 else 334 icl_pdu_free(request); 335 cv_signal(&cs->cs_login_cv); 336 return; 337 } 338 #endif 339 340 cfiscsi_pdu_handle(request); 341 } 342 343 static void 344 cfiscsi_error_callback(struct icl_conn *ic) 345 { 346 struct cfiscsi_session *cs; 347 348 cs = CONN_SESSION(ic); 349 350 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 351 cfiscsi_session_terminate(cs); 352 } 353 354 static int 355 cfiscsi_pdu_prepare(struct icl_pdu *response) 356 { 357 struct cfiscsi_session *cs; 358 struct iscsi_bhs_scsi_response *bhssr; 359 bool advance_statsn = true; 360 uint32_t cmdsn; 361 362 cs = PDU_SESSION(response); 363 364 CFISCSI_SESSION_LOCK_ASSERT(cs); 365 366 /* 367 * We're only using fields common for all the response 368 * (target -> initiator) PDUs. 369 */ 370 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 371 372 /* 373 * 10.8.3: "The StatSN for this connection is not advanced 374 * after this PDU is sent." 375 */ 376 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 377 advance_statsn = false; 378 379 /* 380 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 381 * StatSN for the connection is not advanced after this PDU is sent." 382 */ 383 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 384 bhssr->bhssr_initiator_task_tag == 0xffffffff) 385 advance_statsn = false; 386 387 /* 388 * See the comment below - StatSN is not meaningful and must 389 * not be advanced. 390 */ 391 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 392 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 393 advance_statsn = false; 394 395 /* 396 * 10.7.3: "The fields StatSN, Status, and Residual Count 397 * only have meaningful content if the S bit is set to 1." 398 */ 399 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 400 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 401 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 402 cmdsn = cs->cs_cmdsn; 403 bhssr->bhssr_expcmdsn = htonl(cmdsn); 404 bhssr->bhssr_maxcmdsn = htonl(cmdsn - 1 + 405 imax(0, maxtags - cs->cs_outstanding_ctl_pdus)); 406 407 if (advance_statsn) 408 cs->cs_statsn++; 409 410 return (0); 411 } 412 413 static void 414 cfiscsi_pdu_queue(struct icl_pdu *response) 415 { 416 struct cfiscsi_session *cs; 417 418 cs = PDU_SESSION(response); 419 420 CFISCSI_SESSION_LOCK(cs); 421 cfiscsi_pdu_prepare(response); 422 icl_pdu_queue(response); 423 CFISCSI_SESSION_UNLOCK(cs); 424 } 425 426 static void 427 cfiscsi_pdu_queue_cb(struct icl_pdu *response, icl_pdu_cb cb) 428 { 429 struct cfiscsi_session *cs = PDU_SESSION(response); 430 431 CFISCSI_SESSION_LOCK(cs); 432 cfiscsi_pdu_prepare(response); 433 icl_pdu_queue_cb(response, cb); 434 CFISCSI_SESSION_UNLOCK(cs); 435 } 436 437 static void 438 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 439 { 440 struct cfiscsi_session *cs; 441 struct iscsi_bhs_nop_out *bhsno; 442 struct iscsi_bhs_nop_in *bhsni; 443 struct icl_pdu *response; 444 void *data = NULL; 445 size_t datasize; 446 int error; 447 448 cs = PDU_SESSION(request); 449 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 450 451 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 452 /* 453 * Nothing to do, iscsi_pdu_update_statsn() already 454 * zeroed the timeout. 455 */ 456 icl_pdu_free(request); 457 return; 458 } 459 460 datasize = icl_pdu_data_segment_length(request); 461 if (datasize > 0) { 462 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 463 if (data == NULL) { 464 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 465 "dropping connection"); 466 icl_pdu_free(request); 467 cfiscsi_session_terminate(cs); 468 return; 469 } 470 icl_pdu_get_data(request, 0, data, datasize); 471 } 472 473 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 474 if (response == NULL) { 475 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 476 "droppping connection"); 477 free(data, M_CFISCSI); 478 icl_pdu_free(request); 479 cfiscsi_session_terminate(cs); 480 return; 481 } 482 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 483 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 484 bhsni->bhsni_flags = 0x80; 485 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 486 bhsni->bhsni_target_transfer_tag = 0xffffffff; 487 if (datasize > 0) { 488 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 489 if (error != 0) { 490 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 491 "dropping connection"); 492 free(data, M_CFISCSI); 493 icl_pdu_free(request); 494 icl_pdu_free(response); 495 cfiscsi_session_terminate(cs); 496 return; 497 } 498 free(data, M_CFISCSI); 499 } 500 501 icl_pdu_free(request); 502 cfiscsi_pdu_queue(response); 503 } 504 505 static void 506 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 507 { 508 struct iscsi_bhs_scsi_command *bhssc; 509 struct cfiscsi_session *cs; 510 union ctl_io *io; 511 int error; 512 513 cs = PDU_SESSION(request); 514 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 515 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 516 // bhssc->bhssc_initiator_task_tag); 517 518 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 519 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 520 "ImmediateData=No; dropping connection"); 521 icl_pdu_free(request); 522 cfiscsi_session_terminate(cs); 523 return; 524 } 525 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 526 ctl_zero_io(io); 527 PRIV_REQUEST(io) = request; 528 io->io_hdr.io_type = CTL_IO_SCSI; 529 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 530 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 531 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 532 io->scsiio.priority = (bhssc->bhssc_pri & BHSSC_PRI_MASK) >> 533 BHSSC_PRI_SHIFT; 534 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 535 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 536 case BHSSC_FLAGS_ATTR_UNTAGGED: 537 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 538 break; 539 case BHSSC_FLAGS_ATTR_SIMPLE: 540 io->scsiio.tag_type = CTL_TAG_SIMPLE; 541 break; 542 case BHSSC_FLAGS_ATTR_ORDERED: 543 io->scsiio.tag_type = CTL_TAG_ORDERED; 544 break; 545 case BHSSC_FLAGS_ATTR_HOQ: 546 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 547 break; 548 case BHSSC_FLAGS_ATTR_ACA: 549 io->scsiio.tag_type = CTL_TAG_ACA; 550 break; 551 default: 552 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 553 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 554 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 555 break; 556 } 557 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 558 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 559 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 560 error = ctl_run(io); 561 if (error != CTL_RETVAL_COMPLETE) { 562 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; " 563 "dropping connection", error); 564 ctl_free_io(io); 565 refcount_release(&cs->cs_outstanding_ctl_pdus); 566 icl_pdu_free(request); 567 cfiscsi_session_terminate(cs); 568 } 569 } 570 571 static void 572 cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 573 { 574 struct iscsi_bhs_task_management_request *bhstmr; 575 struct iscsi_bhs_task_management_response *bhstmr2; 576 struct icl_pdu *response; 577 struct cfiscsi_session *cs; 578 union ctl_io *io; 579 int error; 580 581 cs = PDU_SESSION(request); 582 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 583 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 584 ctl_zero_io(io); 585 PRIV_REQUEST(io) = request; 586 io->io_hdr.io_type = CTL_IO_TASK; 587 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 588 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 589 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 590 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 591 592 switch (bhstmr->bhstmr_function & ~0x80) { 593 case BHSTMR_FUNCTION_ABORT_TASK: 594 #if 0 595 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 596 #endif 597 io->taskio.task_action = CTL_TASK_ABORT_TASK; 598 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 599 break; 600 case BHSTMR_FUNCTION_ABORT_TASK_SET: 601 #if 0 602 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 603 #endif 604 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 605 break; 606 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 607 #if 0 608 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 609 #endif 610 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 611 break; 612 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 613 #if 0 614 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 615 #endif 616 io->taskio.task_action = CTL_TASK_LUN_RESET; 617 break; 618 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 619 #if 0 620 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 621 #endif 622 io->taskio.task_action = CTL_TASK_TARGET_RESET; 623 break; 624 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 625 #if 0 626 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 627 #endif 628 io->taskio.task_action = CTL_TASK_TARGET_RESET; 629 break; 630 case BHSTMR_FUNCTION_QUERY_TASK: 631 #if 0 632 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 633 #endif 634 io->taskio.task_action = CTL_TASK_QUERY_TASK; 635 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 636 break; 637 case BHSTMR_FUNCTION_QUERY_TASK_SET: 638 #if 0 639 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 640 #endif 641 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 642 break; 643 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 644 #if 0 645 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 646 #endif 647 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 648 break; 649 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 650 #if 0 651 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 652 #endif 653 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 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_run(io); 683 if (error != CTL_RETVAL_COMPLETE) { 684 CFISCSI_SESSION_WARN(cs, "ctl_run() 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 } 692 693 static bool 694 cfiscsi_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 io->scsiio.kern_data_resid -= copy_len; 791 792 if (cdw->cdw_sg_len == 0) { 793 /* 794 * End of current segment. 795 */ 796 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 797 /* 798 * Last segment in scatter/gather list. 799 */ 800 break; 801 } 802 cdw->cdw_sg_index++; 803 } 804 805 if (off == len) { 806 /* 807 * End of PDU payload. 808 */ 809 break; 810 } 811 } 812 813 if (len > off) { 814 /* 815 * In case of unsolicited data, it's possible that the buffer 816 * provided by CTL is smaller than negotiated FirstBurstLength. 817 * Just ignore the superfluous data; will ask for them with R2T 818 * on next call to cfiscsi_datamove(). 819 * 820 * This obviously can only happen with SCSI Command PDU. 821 */ 822 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 823 ISCSI_BHS_OPCODE_SCSI_COMMAND) 824 return (true); 825 826 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 827 "expected %zd; dropping connection", 828 icl_pdu_data_segment_length(request), off); 829 ctl_set_data_phase_error(&io->scsiio); 830 cfiscsi_session_terminate(cs); 831 return (true); 832 } 833 834 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 835 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 836 CFISCSI_SESSION_WARN(cs, "got the final packet without " 837 "the F flag; flags = 0x%x; dropping connection", 838 bhsdo->bhsdo_flags); 839 ctl_set_data_phase_error(&io->scsiio); 840 cfiscsi_session_terminate(cs); 841 return (true); 842 } 843 844 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 845 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 846 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 847 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 848 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 849 "transmitted size was %zd bytes instead of %d; " 850 "dropping connection", 851 (size_t)io->scsiio.ext_data_filled, 852 cdw->cdw_r2t_end); 853 ctl_set_data_phase_error(&io->scsiio); 854 cfiscsi_session_terminate(cs); 855 return (true); 856 } else { 857 /* 858 * For SCSI Command PDU, this just means we need to 859 * solicit more data by sending R2T. 860 */ 861 return (false); 862 } 863 } 864 865 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 866 #if 0 867 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 868 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 869 #endif 870 871 return (true); 872 } 873 874 return (false); 875 } 876 877 static void 878 cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 879 { 880 struct iscsi_bhs_data_out *bhsdo; 881 struct cfiscsi_session *cs; 882 struct cfiscsi_data_wait *cdw = NULL; 883 union ctl_io *io; 884 bool done; 885 886 cs = PDU_SESSION(request); 887 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 888 889 CFISCSI_SESSION_LOCK(cs); 890 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 891 #if 0 892 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 893 "ttt 0x%x, itt 0x%x", 894 bhsdo->bhsdo_target_transfer_tag, 895 bhsdo->bhsdo_initiator_task_tag, 896 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 897 #endif 898 if (bhsdo->bhsdo_target_transfer_tag == 899 cdw->cdw_target_transfer_tag) 900 break; 901 } 902 CFISCSI_SESSION_UNLOCK(cs); 903 if (cdw == NULL) { 904 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 905 "0x%x, not found; dropping connection", 906 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 907 icl_pdu_free(request); 908 cfiscsi_session_terminate(cs); 909 return; 910 } 911 912 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 913 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 914 "DataSN %u, while expected %u; dropping connection", 915 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 916 icl_pdu_free(request); 917 cfiscsi_session_terminate(cs); 918 return; 919 } 920 cdw->cdw_datasn += request->ip_additional_pdus + 1; 921 922 io = cdw->cdw_ctl_io; 923 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 924 ("CTL_FLAG_DATA_IN")); 925 926 done = cfiscsi_handle_data_segment(request, cdw); 927 if (done) { 928 CFISCSI_SESSION_LOCK(cs); 929 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 930 CFISCSI_SESSION_UNLOCK(cs); 931 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 932 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 933 cfiscsi_data_wait_free(cs, cdw); 934 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 935 if (done) 936 ctl_datamove_done(io, false); 937 else 938 cfiscsi_datamove_out(io); 939 } 940 941 icl_pdu_free(request); 942 } 943 944 static void 945 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 946 { 947 struct iscsi_bhs_logout_request *bhslr; 948 struct iscsi_bhs_logout_response *bhslr2; 949 struct icl_pdu *response; 950 struct cfiscsi_session *cs; 951 952 cs = PDU_SESSION(request); 953 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 954 switch (bhslr->bhslr_reason & 0x7f) { 955 case BHSLR_REASON_CLOSE_SESSION: 956 case BHSLR_REASON_CLOSE_CONNECTION: 957 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 958 if (response == NULL) { 959 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 960 icl_pdu_free(request); 961 cfiscsi_session_terminate(cs); 962 return; 963 } 964 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 965 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 966 bhslr2->bhslr_flags = 0x80; 967 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 968 bhslr2->bhslr_initiator_task_tag = 969 bhslr->bhslr_initiator_task_tag; 970 icl_pdu_free(request); 971 cfiscsi_pdu_queue(response); 972 cfiscsi_session_terminate(cs); 973 break; 974 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 975 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 976 if (response == NULL) { 977 CFISCSI_SESSION_WARN(cs, 978 "failed to allocate memory; dropping connection"); 979 icl_pdu_free(request); 980 cfiscsi_session_terminate(cs); 981 return; 982 } 983 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 984 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 985 bhslr2->bhslr_flags = 0x80; 986 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 987 bhslr2->bhslr_initiator_task_tag = 988 bhslr->bhslr_initiator_task_tag; 989 icl_pdu_free(request); 990 cfiscsi_pdu_queue(response); 991 break; 992 default: 993 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 994 bhslr->bhslr_reason); 995 icl_pdu_free(request); 996 cfiscsi_session_terminate(cs); 997 break; 998 } 999 } 1000 1001 static void 1002 cfiscsi_callout(void *context) 1003 { 1004 struct icl_pdu *cp; 1005 struct iscsi_bhs_nop_in *bhsni; 1006 struct cfiscsi_session *cs; 1007 1008 cs = context; 1009 1010 if (cs->cs_terminating) 1011 return; 1012 1013 callout_schedule(&cs->cs_callout, 1 * hz); 1014 1015 atomic_add_int(&cs->cs_timeout, 1); 1016 1017 #ifdef ICL_KERNEL_PROXY 1018 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1019 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1020 CFISCSI_SESSION_WARN(cs, "login timed out after " 1021 "%d seconds; dropping connection", cs->cs_timeout); 1022 cfiscsi_session_terminate(cs); 1023 } 1024 return; 1025 } 1026 #endif 1027 1028 if (ping_timeout <= 0) { 1029 /* 1030 * Pings are disabled. Don't send NOP-In in this case; 1031 * user might have disabled pings to work around problems 1032 * with certain initiators that can't properly handle 1033 * NOP-In, such as iPXE. Reset the timeout, to avoid 1034 * triggering reconnection, should the user decide to 1035 * reenable them. 1036 */ 1037 cs->cs_timeout = 0; 1038 return; 1039 } 1040 1041 if (cs->cs_timeout >= ping_timeout) { 1042 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1043 "dropping connection", ping_timeout); 1044 cfiscsi_session_terminate(cs); 1045 return; 1046 } 1047 1048 /* 1049 * If the ping was reset less than one second ago - which means 1050 * that we've received some PDU during the last second - assume 1051 * the traffic flows correctly and don't bother sending a NOP-Out. 1052 * 1053 * (It's 2 - one for one second, and one for incrementing is_timeout 1054 * earlier in this routine.) 1055 */ 1056 if (cs->cs_timeout < 2) 1057 return; 1058 1059 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1060 if (cp == NULL) { 1061 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1062 return; 1063 } 1064 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1065 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1066 bhsni->bhsni_flags = 0x80; 1067 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1068 1069 cfiscsi_pdu_queue(cp); 1070 } 1071 1072 static struct cfiscsi_data_wait * 1073 cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1074 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1075 { 1076 struct cfiscsi_data_wait *cdw; 1077 int error; 1078 1079 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1080 if (cdw == NULL) { 1081 CFISCSI_SESSION_WARN(cs, 1082 "failed to allocate %zd bytes", sizeof(*cdw)); 1083 return (NULL); 1084 } 1085 1086 error = icl_conn_transfer_setup(cs->cs_conn, PRIV_REQUEST(io), io, 1087 target_transfer_tagp, &cdw->cdw_icl_prv); 1088 if (error != 0) { 1089 CFISCSI_SESSION_WARN(cs, 1090 "icl_conn_transfer_setup() failed with error %d", error); 1091 uma_zfree(cfiscsi_data_wait_zone, cdw); 1092 return (NULL); 1093 } 1094 1095 cdw->cdw_ctl_io = io; 1096 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1097 cdw->cdw_initiator_task_tag = initiator_task_tag; 1098 1099 return (cdw); 1100 } 1101 1102 static void 1103 cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1104 struct cfiscsi_data_wait *cdw) 1105 { 1106 1107 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1108 uma_zfree(cfiscsi_data_wait_zone, cdw); 1109 } 1110 1111 static void 1112 cfiscsi_data_wait_abort(struct cfiscsi_session *cs, 1113 struct cfiscsi_data_wait *cdw, int status) 1114 { 1115 union ctl_io *cdw_io; 1116 1117 /* 1118 * Set nonzero port status; this prevents backends from 1119 * assuming that the data transfer actually succeeded 1120 * and writing uninitialized data to disk. 1121 */ 1122 MPASS(status != 0); 1123 cdw_io = cdw->cdw_ctl_io; 1124 cdw_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1125 cdw_io->scsiio.io_hdr.port_status = status; 1126 cfiscsi_data_wait_free(cs, cdw); 1127 ctl_datamove_done(cdw_io, false); 1128 } 1129 1130 static void 1131 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1132 { 1133 struct cfiscsi_data_wait *cdw; 1134 union ctl_io *io; 1135 int error, last, wait; 1136 1137 if (cs->cs_target == NULL) 1138 return; /* No target yet, so nothing to do. */ 1139 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1140 ctl_zero_io(io); 1141 PRIV_REQUEST(io) = cs; 1142 io->io_hdr.io_type = CTL_IO_TASK; 1143 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1144 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1145 io->io_hdr.nexus.targ_lun = 0; 1146 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1147 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1148 wait = cs->cs_outstanding_ctl_pdus; 1149 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1150 error = ctl_run(io); 1151 if (error != CTL_RETVAL_COMPLETE) { 1152 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d", error); 1153 refcount_release(&cs->cs_outstanding_ctl_pdus); 1154 ctl_free_io(io); 1155 } 1156 1157 CFISCSI_SESSION_LOCK(cs); 1158 cs->cs_terminating_tasks = true; 1159 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1160 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1161 CFISCSI_SESSION_UNLOCK(cs); 1162 cfiscsi_data_wait_abort(cs, cdw, 42); 1163 CFISCSI_SESSION_LOCK(cs); 1164 } 1165 CFISCSI_SESSION_UNLOCK(cs); 1166 1167 /* 1168 * Wait for CTL to terminate all the tasks. 1169 */ 1170 if (wait > 0) 1171 CFISCSI_SESSION_WARN(cs, 1172 "waiting for CTL to terminate %d tasks", wait); 1173 for (;;) { 1174 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1175 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1176 if (last != 0) 1177 break; 1178 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1179 0, "cfiscsi_terminate", hz / 100); 1180 } 1181 if (wait > 0) 1182 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1183 } 1184 1185 static void 1186 cfiscsi_maintenance_thread(void *arg) 1187 { 1188 struct cfiscsi_session *cs; 1189 1190 cs = arg; 1191 1192 for (;;) { 1193 CFISCSI_SESSION_LOCK(cs); 1194 if (cs->cs_terminating == false || cs->cs_handoff_in_progress) 1195 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1196 CFISCSI_SESSION_UNLOCK(cs); 1197 1198 if (cs->cs_terminating && cs->cs_handoff_in_progress == false) { 1199 /* 1200 * We used to wait up to 30 seconds to deliver queued 1201 * PDUs to the initiator. We also tried hard to deliver 1202 * SCSI Responses for the aborted PDUs. We don't do 1203 * that anymore. We might need to revisit that. 1204 */ 1205 callout_drain(&cs->cs_callout); 1206 icl_conn_close(cs->cs_conn); 1207 1208 /* 1209 * At this point ICL receive thread is no longer 1210 * running; no new tasks can be queued. 1211 */ 1212 cfiscsi_session_terminate_tasks(cs); 1213 cfiscsi_session_delete(cs); 1214 kthread_exit(); 1215 return; 1216 } 1217 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1218 } 1219 } 1220 1221 static void 1222 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1223 { 1224 1225 cs->cs_terminating = true; 1226 cv_signal(&cs->cs_maintenance_cv); 1227 #ifdef ICL_KERNEL_PROXY 1228 cv_signal(&cs->cs_login_cv); 1229 #endif 1230 } 1231 1232 static int 1233 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1234 { 1235 struct cfiscsi_target *ct; 1236 char *name; 1237 int i; 1238 1239 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1240 1241 ct = cs->cs_target; 1242 name = strdup(cs->cs_initiator_id, M_CTL); 1243 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1244 if (i < 0) { 1245 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1246 i); 1247 cs->cs_ctl_initid = -1; 1248 return (1); 1249 } 1250 cs->cs_ctl_initid = i; 1251 #if 0 1252 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1253 #endif 1254 1255 return (0); 1256 } 1257 1258 static void 1259 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1260 { 1261 int error; 1262 1263 if (cs->cs_ctl_initid == -1) 1264 return; 1265 1266 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1267 if (error != 0) { 1268 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1269 error); 1270 } 1271 cs->cs_ctl_initid = -1; 1272 } 1273 1274 static struct cfiscsi_session * 1275 cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1276 { 1277 struct cfiscsi_session *cs; 1278 int error; 1279 1280 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1281 if (cs == NULL) { 1282 CFISCSI_WARN("malloc failed"); 1283 return (NULL); 1284 } 1285 cs->cs_ctl_initid = -1; 1286 1287 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1288 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1289 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1290 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1291 #ifdef ICL_KERNEL_PROXY 1292 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1293 #endif 1294 1295 /* 1296 * The purpose of this is to avoid racing with session shutdown. 1297 * Otherwise we could have the maintenance thread call icl_conn_close() 1298 * before we call icl_conn_handoff(). 1299 */ 1300 cs->cs_handoff_in_progress = true; 1301 1302 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); 1303 if (cs->cs_conn == NULL) { 1304 free(cs, M_CFISCSI); 1305 return (NULL); 1306 } 1307 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1308 cs->cs_conn->ic_error = cfiscsi_error_callback; 1309 cs->cs_conn->ic_prv0 = cs; 1310 1311 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1312 if (error != 0) { 1313 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1314 free(cs, M_CFISCSI); 1315 return (NULL); 1316 } 1317 1318 mtx_lock(&softc->lock); 1319 cs->cs_id = ++softc->last_session_id; 1320 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1321 mtx_unlock(&softc->lock); 1322 1323 /* 1324 * Start pinging the initiator. 1325 */ 1326 callout_init(&cs->cs_callout, 1); 1327 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1328 1329 return (cs); 1330 } 1331 1332 static void 1333 cfiscsi_session_delete(struct cfiscsi_session *cs) 1334 { 1335 struct cfiscsi_softc *softc; 1336 1337 softc = &cfiscsi_softc; 1338 1339 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1340 ("destroying session with outstanding CTL pdus")); 1341 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1342 ("destroying session with non-empty queue")); 1343 1344 mtx_lock(&softc->lock); 1345 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1346 mtx_unlock(&softc->lock); 1347 1348 cfiscsi_session_unregister_initiator(cs); 1349 if (cs->cs_target != NULL) 1350 cfiscsi_target_release(cs->cs_target); 1351 icl_conn_close(cs->cs_conn); 1352 icl_conn_free(cs->cs_conn); 1353 free(cs, M_CFISCSI); 1354 cv_signal(&softc->sessions_cv); 1355 } 1356 1357 static int 1358 cfiscsi_init(void) 1359 { 1360 struct cfiscsi_softc *softc; 1361 1362 softc = &cfiscsi_softc; 1363 bzero(softc, sizeof(*softc)); 1364 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1365 1366 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1367 #ifdef ICL_KERNEL_PROXY 1368 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1369 #endif 1370 TAILQ_INIT(&softc->sessions); 1371 TAILQ_INIT(&softc->targets); 1372 1373 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1374 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1375 UMA_ALIGN_PTR, 0); 1376 1377 return (0); 1378 } 1379 1380 static int 1381 cfiscsi_shutdown(void) 1382 { 1383 struct cfiscsi_softc *softc = &cfiscsi_softc; 1384 1385 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) 1386 return (EBUSY); 1387 1388 uma_zdestroy(cfiscsi_data_wait_zone); 1389 #ifdef ICL_KERNEL_PROXY 1390 cv_destroy(&softc->accept_cv); 1391 #endif 1392 cv_destroy(&softc->sessions_cv); 1393 mtx_destroy(&softc->lock); 1394 return (0); 1395 } 1396 1397 #ifdef ICL_KERNEL_PROXY 1398 static void 1399 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1400 { 1401 struct cfiscsi_session *cs; 1402 1403 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1404 if (cs == NULL) { 1405 CFISCSI_WARN("failed to create session"); 1406 return; 1407 } 1408 1409 icl_conn_handoff_sock(cs->cs_conn, so); 1410 cs->cs_initiator_sa = sa; 1411 cs->cs_portal_id = portal_id; 1412 cs->cs_handoff_in_progress = false; 1413 cs->cs_waiting_for_ctld = true; 1414 cv_signal(&cfiscsi_softc.accept_cv); 1415 1416 CFISCSI_SESSION_LOCK(cs); 1417 /* 1418 * Wake up the maintenance thread if we got scheduled for termination 1419 * somewhere between cfiscsi_session_new() and icl_conn_handoff_sock(). 1420 */ 1421 if (cs->cs_terminating) 1422 cfiscsi_session_terminate(cs); 1423 CFISCSI_SESSION_UNLOCK(cs); 1424 } 1425 #endif 1426 1427 static void 1428 cfiscsi_online(void *arg) 1429 { 1430 struct cfiscsi_softc *softc; 1431 struct cfiscsi_target *ct; 1432 int online; 1433 1434 ct = (struct cfiscsi_target *)arg; 1435 softc = ct->ct_softc; 1436 1437 mtx_lock(&softc->lock); 1438 if (ct->ct_online) { 1439 mtx_unlock(&softc->lock); 1440 return; 1441 } 1442 ct->ct_online = 1; 1443 online = softc->online++; 1444 mtx_unlock(&softc->lock); 1445 if (online > 0) 1446 return; 1447 1448 #ifdef ICL_KERNEL_PROXY 1449 if (softc->listener != NULL) 1450 icl_listen_free(softc->listener); 1451 softc->listener = icl_listen_new(cfiscsi_accept); 1452 #endif 1453 } 1454 1455 static void 1456 cfiscsi_offline(void *arg) 1457 { 1458 struct cfiscsi_softc *softc; 1459 struct cfiscsi_target *ct; 1460 struct cfiscsi_session *cs; 1461 int error, online; 1462 1463 ct = (struct cfiscsi_target *)arg; 1464 softc = ct->ct_softc; 1465 1466 mtx_lock(&softc->lock); 1467 if (!ct->ct_online) { 1468 mtx_unlock(&softc->lock); 1469 return; 1470 } 1471 ct->ct_online = 0; 1472 online = --softc->online; 1473 1474 do { 1475 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1476 if (cs->cs_target == ct) 1477 cfiscsi_session_terminate(cs); 1478 } 1479 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1480 if (cs->cs_target == ct) 1481 break; 1482 } 1483 if (cs != NULL) { 1484 error = cv_wait_sig(&softc->sessions_cv, &softc->lock); 1485 if (error != 0) { 1486 CFISCSI_SESSION_DEBUG(cs, 1487 "cv_wait failed with error %d\n", error); 1488 break; 1489 } 1490 } 1491 } while (cs != NULL && ct->ct_online == 0); 1492 mtx_unlock(&softc->lock); 1493 if (online > 0) 1494 return; 1495 1496 #ifdef ICL_KERNEL_PROXY 1497 icl_listen_free(softc->listener); 1498 softc->listener = NULL; 1499 #endif 1500 } 1501 1502 static int 1503 cfiscsi_info(void *arg, struct sbuf *sb) 1504 { 1505 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1506 int retval; 1507 1508 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1509 ct->ct_state); 1510 return (retval); 1511 } 1512 1513 static void 1514 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1515 { 1516 struct cfiscsi_softc *softc; 1517 struct cfiscsi_session *cs, *cs2; 1518 struct cfiscsi_target *ct; 1519 struct ctl_iscsi_handoff_params *cihp; 1520 int error; 1521 1522 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1523 softc = &cfiscsi_softc; 1524 1525 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1526 cihp->initiator_name, cihp->initiator_addr, 1527 cihp->target_name); 1528 1529 ct = cfiscsi_target_find(softc, cihp->target_name, 1530 cihp->portal_group_tag); 1531 if (ct == NULL) { 1532 ci->status = CTL_ISCSI_ERROR; 1533 snprintf(ci->error_str, sizeof(ci->error_str), 1534 "%s: target not found", __func__); 1535 return; 1536 } 1537 1538 #ifdef ICL_KERNEL_PROXY 1539 if (cihp->socket > 0 && cihp->connection_id > 0) { 1540 snprintf(ci->error_str, sizeof(ci->error_str), 1541 "both socket and connection_id set"); 1542 ci->status = CTL_ISCSI_ERROR; 1543 cfiscsi_target_release(ct); 1544 return; 1545 } 1546 if (cihp->socket == 0) { 1547 mtx_lock(&cfiscsi_softc.lock); 1548 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1549 if (cs->cs_id == cihp->connection_id) 1550 break; 1551 } 1552 if (cs == NULL) { 1553 mtx_unlock(&cfiscsi_softc.lock); 1554 snprintf(ci->error_str, sizeof(ci->error_str), 1555 "connection not found"); 1556 ci->status = CTL_ISCSI_ERROR; 1557 cfiscsi_target_release(ct); 1558 return; 1559 } 1560 mtx_unlock(&cfiscsi_softc.lock); 1561 } else { 1562 #endif 1563 cs = cfiscsi_session_new(softc, cihp->offload); 1564 if (cs == NULL) { 1565 ci->status = CTL_ISCSI_ERROR; 1566 snprintf(ci->error_str, sizeof(ci->error_str), 1567 "%s: cfiscsi_session_new failed", __func__); 1568 cfiscsi_target_release(ct); 1569 return; 1570 } 1571 #ifdef ICL_KERNEL_PROXY 1572 } 1573 #endif 1574 1575 /* 1576 * First PDU of Full Feature phase has the same CmdSN as the last 1577 * PDU from the Login Phase received from the initiator. Thus, 1578 * the -1 below. 1579 */ 1580 cs->cs_cmdsn = cihp->cmdsn; 1581 cs->cs_statsn = cihp->statsn; 1582 cs->cs_conn->ic_max_recv_data_segment_length = 1583 cihp->max_recv_data_segment_length; 1584 cs->cs_conn->ic_max_send_data_segment_length = 1585 cihp->max_send_data_segment_length; 1586 cs->cs_max_burst_length = cihp->max_burst_length; 1587 cs->cs_first_burst_length = cihp->first_burst_length; 1588 cs->cs_immediate_data = !!cihp->immediate_data; 1589 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1590 cs->cs_conn->ic_header_crc32c = true; 1591 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1592 cs->cs_conn->ic_data_crc32c = true; 1593 1594 strlcpy(cs->cs_initiator_name, 1595 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1596 strlcpy(cs->cs_initiator_addr, 1597 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1598 strlcpy(cs->cs_initiator_alias, 1599 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1600 memcpy(cs->cs_initiator_isid, 1601 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1602 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1603 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1604 cihp->initiator_isid[0], cihp->initiator_isid[1], 1605 cihp->initiator_isid[2], cihp->initiator_isid[3], 1606 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1607 1608 mtx_lock(&softc->lock); 1609 if (ct->ct_online == 0) { 1610 mtx_unlock(&softc->lock); 1611 CFISCSI_SESSION_LOCK(cs); 1612 cs->cs_handoff_in_progress = false; 1613 cfiscsi_session_terminate(cs); 1614 CFISCSI_SESSION_UNLOCK(cs); 1615 cfiscsi_target_release(ct); 1616 ci->status = CTL_ISCSI_ERROR; 1617 snprintf(ci->error_str, sizeof(ci->error_str), 1618 "%s: port offline", __func__); 1619 return; 1620 } 1621 cs->cs_target = ct; 1622 mtx_unlock(&softc->lock); 1623 1624 restart: 1625 if (!cs->cs_terminating) { 1626 mtx_lock(&softc->lock); 1627 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1628 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1629 cs->cs_target == cs2->cs_target && 1630 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1631 if (strcmp(cs->cs_initiator_addr, 1632 cs2->cs_initiator_addr) != 0) { 1633 CFISCSI_SESSION_WARN(cs2, 1634 "session reinstatement from " 1635 "different address %s", 1636 cs->cs_initiator_addr); 1637 } else { 1638 CFISCSI_SESSION_DEBUG(cs2, 1639 "session reinstatement"); 1640 } 1641 cfiscsi_session_terminate(cs2); 1642 mtx_unlock(&softc->lock); 1643 pause("cfiscsi_reinstate", 1); 1644 goto restart; 1645 } 1646 } 1647 mtx_unlock(&softc->lock); 1648 } 1649 1650 /* 1651 * Register initiator with CTL. 1652 */ 1653 cfiscsi_session_register_initiator(cs); 1654 1655 #ifdef ICL_KERNEL_PROXY 1656 if (cihp->socket > 0) { 1657 #endif 1658 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1659 if (error != 0) { 1660 CFISCSI_SESSION_LOCK(cs); 1661 cs->cs_handoff_in_progress = false; 1662 cfiscsi_session_terminate(cs); 1663 CFISCSI_SESSION_UNLOCK(cs); 1664 ci->status = CTL_ISCSI_ERROR; 1665 snprintf(ci->error_str, sizeof(ci->error_str), 1666 "%s: icl_conn_handoff failed with error %d", 1667 __func__, error); 1668 return; 1669 } 1670 #ifdef ICL_KERNEL_PROXY 1671 } 1672 #endif 1673 1674 #ifdef ICL_KERNEL_PROXY 1675 cs->cs_login_phase = false; 1676 1677 /* 1678 * First PDU of the Full Feature phase has likely already arrived. 1679 * We have to pick it up and execute properly. 1680 */ 1681 if (cs->cs_login_pdu != NULL) { 1682 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1683 cfiscsi_pdu_handle(cs->cs_login_pdu); 1684 cs->cs_login_pdu = NULL; 1685 } 1686 #endif 1687 1688 CFISCSI_SESSION_LOCK(cs); 1689 cs->cs_handoff_in_progress = false; 1690 1691 /* 1692 * Wake up the maintenance thread if we got scheduled for termination. 1693 */ 1694 if (cs->cs_terminating) 1695 cfiscsi_session_terminate(cs); 1696 CFISCSI_SESSION_UNLOCK(cs); 1697 1698 ci->status = CTL_ISCSI_OK; 1699 } 1700 1701 static void 1702 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1703 { 1704 struct ctl_iscsi_list_params *cilp; 1705 struct cfiscsi_session *cs; 1706 struct cfiscsi_softc *softc; 1707 struct sbuf *sb; 1708 int error; 1709 1710 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1711 softc = &cfiscsi_softc; 1712 1713 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1714 if (sb == NULL) { 1715 ci->status = CTL_ISCSI_ERROR; 1716 snprintf(ci->error_str, sizeof(ci->error_str), 1717 "Unable to allocate %d bytes for iSCSI session list", 1718 cilp->alloc_len); 1719 return; 1720 } 1721 1722 sbuf_printf(sb, "<ctlislist>\n"); 1723 mtx_lock(&softc->lock); 1724 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1725 if (cs->cs_target == NULL) 1726 continue; 1727 error = sbuf_printf(sb, "<connection id=\"%d\">" 1728 "<initiator>%s</initiator>" 1729 "<initiator_addr>%s</initiator_addr>" 1730 "<initiator_alias>%s</initiator_alias>" 1731 "<target>%s</target>" 1732 "<target_alias>%s</target_alias>" 1733 "<target_portal_group_tag>%u</target_portal_group_tag>" 1734 "<header_digest>%s</header_digest>" 1735 "<data_digest>%s</data_digest>" 1736 "<max_recv_data_segment_length>%d</max_recv_data_segment_length>" 1737 "<max_send_data_segment_length>%d</max_send_data_segment_length>" 1738 "<max_burst_length>%d</max_burst_length>" 1739 "<first_burst_length>%d</first_burst_length>" 1740 "<immediate_data>%d</immediate_data>" 1741 "<iser>%d</iser>" 1742 "<offload>%s</offload>" 1743 "</connection>\n", 1744 cs->cs_id, 1745 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1746 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1747 cs->cs_target->ct_tag, 1748 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1749 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1750 cs->cs_conn->ic_max_recv_data_segment_length, 1751 cs->cs_conn->ic_max_send_data_segment_length, 1752 cs->cs_max_burst_length, 1753 cs->cs_first_burst_length, 1754 cs->cs_immediate_data, 1755 cs->cs_conn->ic_iser, 1756 cs->cs_conn->ic_offload); 1757 if (error != 0) 1758 break; 1759 } 1760 mtx_unlock(&softc->lock); 1761 error = sbuf_printf(sb, "</ctlislist>\n"); 1762 if (error != 0) { 1763 sbuf_delete(sb); 1764 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1765 snprintf(ci->error_str, sizeof(ci->error_str), 1766 "Out of space, %d bytes is too small", cilp->alloc_len); 1767 return; 1768 } 1769 sbuf_finish(sb); 1770 1771 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1772 if (error != 0) { 1773 sbuf_delete(sb); 1774 snprintf(ci->error_str, sizeof(ci->error_str), 1775 "copyout failed with error %d", error); 1776 ci->status = CTL_ISCSI_ERROR; 1777 return; 1778 } 1779 cilp->fill_len = sbuf_len(sb) + 1; 1780 ci->status = CTL_ISCSI_OK; 1781 sbuf_delete(sb); 1782 } 1783 1784 static void 1785 cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1786 { 1787 struct icl_pdu *response; 1788 struct iscsi_bhs_asynchronous_message *bhsam; 1789 struct ctl_iscsi_logout_params *cilp; 1790 struct cfiscsi_session *cs; 1791 struct cfiscsi_softc *softc; 1792 int found = 0; 1793 1794 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1795 softc = &cfiscsi_softc; 1796 1797 mtx_lock(&softc->lock); 1798 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1799 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1800 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1801 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1802 continue; 1803 1804 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1805 if (response == NULL) { 1806 ci->status = CTL_ISCSI_ERROR; 1807 snprintf(ci->error_str, sizeof(ci->error_str), 1808 "Unable to allocate memory"); 1809 mtx_unlock(&softc->lock); 1810 return; 1811 } 1812 bhsam = 1813 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1814 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1815 bhsam->bhsam_flags = 0x80; 1816 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1817 bhsam->bhsam_parameter3 = htons(10); 1818 cfiscsi_pdu_queue(response); 1819 found++; 1820 } 1821 mtx_unlock(&softc->lock); 1822 1823 if (found == 0) { 1824 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1825 snprintf(ci->error_str, sizeof(ci->error_str), 1826 "No matching connections found"); 1827 return; 1828 } 1829 1830 ci->status = CTL_ISCSI_OK; 1831 } 1832 1833 static void 1834 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1835 { 1836 struct icl_pdu *response; 1837 struct iscsi_bhs_asynchronous_message *bhsam; 1838 struct ctl_iscsi_terminate_params *citp; 1839 struct cfiscsi_session *cs; 1840 struct cfiscsi_softc *softc; 1841 int found = 0; 1842 1843 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1844 softc = &cfiscsi_softc; 1845 1846 mtx_lock(&softc->lock); 1847 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1848 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1849 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1850 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1851 continue; 1852 1853 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1854 if (response == NULL) { 1855 /* 1856 * Oh well. Just terminate the connection. 1857 */ 1858 } else { 1859 bhsam = (struct iscsi_bhs_asynchronous_message *) 1860 response->ip_bhs; 1861 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1862 bhsam->bhsam_flags = 0x80; 1863 bhsam->bhsam_0xffffffff = 0xffffffff; 1864 bhsam->bhsam_async_event = 1865 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1866 cfiscsi_pdu_queue(response); 1867 } 1868 cfiscsi_session_terminate(cs); 1869 found++; 1870 } 1871 mtx_unlock(&softc->lock); 1872 1873 if (found == 0) { 1874 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1875 snprintf(ci->error_str, sizeof(ci->error_str), 1876 "No matching connections found"); 1877 return; 1878 } 1879 1880 ci->status = CTL_ISCSI_OK; 1881 } 1882 1883 static void 1884 cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1885 { 1886 struct ctl_iscsi_limits_params *cilp; 1887 struct icl_drv_limits idl; 1888 int error; 1889 1890 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1891 1892 error = icl_limits(cilp->offload, false, &idl); 1893 if (error != 0) { 1894 ci->status = CTL_ISCSI_ERROR; 1895 snprintf(ci->error_str, sizeof(ci->error_str), 1896 "%s: icl_limits failed with error %d", 1897 __func__, error); 1898 return; 1899 } 1900 1901 cilp->max_recv_data_segment_length = 1902 idl.idl_max_recv_data_segment_length; 1903 cilp->max_send_data_segment_length = 1904 idl.idl_max_send_data_segment_length; 1905 cilp->max_burst_length = idl.idl_max_burst_length; 1906 cilp->first_burst_length = idl.idl_first_burst_length; 1907 1908 ci->status = CTL_ISCSI_OK; 1909 } 1910 1911 #ifdef ICL_KERNEL_PROXY 1912 static void 1913 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1914 { 1915 struct ctl_iscsi_listen_params *cilp; 1916 struct sockaddr *sa; 1917 int error; 1918 1919 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1920 1921 if (cfiscsi_softc.listener == NULL) { 1922 CFISCSI_DEBUG("no listener"); 1923 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1924 ci->status = CTL_ISCSI_ERROR; 1925 return; 1926 } 1927 1928 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1929 if (error != 0) { 1930 CFISCSI_DEBUG("getsockaddr, error %d", error); 1931 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1932 ci->status = CTL_ISCSI_ERROR; 1933 return; 1934 } 1935 1936 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1937 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1938 if (error != 0) { 1939 free(sa, M_SONAME); 1940 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1941 snprintf(ci->error_str, sizeof(ci->error_str), 1942 "icl_listen_add failed, error %d", error); 1943 ci->status = CTL_ISCSI_ERROR; 1944 return; 1945 } 1946 1947 ci->status = CTL_ISCSI_OK; 1948 } 1949 1950 static void 1951 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1952 { 1953 struct ctl_iscsi_accept_params *ciap; 1954 struct cfiscsi_session *cs; 1955 int error; 1956 1957 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1958 1959 mtx_lock(&cfiscsi_softc.lock); 1960 for (;;) { 1961 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1962 if (cs->cs_waiting_for_ctld) 1963 break; 1964 } 1965 if (cs != NULL) 1966 break; 1967 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1968 if (error != 0) { 1969 mtx_unlock(&cfiscsi_softc.lock); 1970 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1971 ci->status = CTL_ISCSI_ERROR; 1972 return; 1973 } 1974 } 1975 mtx_unlock(&cfiscsi_softc.lock); 1976 1977 cs->cs_waiting_for_ctld = false; 1978 cs->cs_login_phase = true; 1979 1980 ciap->connection_id = cs->cs_id; 1981 ciap->portal_id = cs->cs_portal_id; 1982 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1983 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1984 cs->cs_initiator_sa->sa_len); 1985 if (error != 0) { 1986 snprintf(ci->error_str, sizeof(ci->error_str), 1987 "copyout failed with error %d", error); 1988 ci->status = CTL_ISCSI_ERROR; 1989 return; 1990 } 1991 1992 ci->status = CTL_ISCSI_OK; 1993 } 1994 1995 static void 1996 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1997 { 1998 struct ctl_iscsi_send_params *cisp; 1999 struct cfiscsi_session *cs; 2000 struct icl_pdu *ip; 2001 size_t datalen; 2002 void *data; 2003 int error; 2004 2005 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 2006 2007 mtx_lock(&cfiscsi_softc.lock); 2008 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2009 if (cs->cs_id == cisp->connection_id) 2010 break; 2011 } 2012 if (cs == NULL) { 2013 mtx_unlock(&cfiscsi_softc.lock); 2014 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 2015 ci->status = CTL_ISCSI_ERROR; 2016 return; 2017 } 2018 mtx_unlock(&cfiscsi_softc.lock); 2019 2020 #if 0 2021 if (cs->cs_login_phase == false) 2022 return (EBUSY); 2023 #endif 2024 2025 if (cs->cs_terminating) { 2026 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 2027 ci->status = CTL_ISCSI_ERROR; 2028 return; 2029 } 2030 2031 datalen = cisp->data_segment_len; 2032 /* 2033 * XXX 2034 */ 2035 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 2036 if (datalen > 65535) { 2037 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 2038 ci->status = CTL_ISCSI_ERROR; 2039 return; 2040 } 2041 if (datalen > 0) { 2042 data = malloc(datalen, M_CFISCSI, M_WAITOK); 2043 error = copyin(cisp->data_segment, data, datalen); 2044 if (error != 0) { 2045 free(data, M_CFISCSI); 2046 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 2047 ci->status = CTL_ISCSI_ERROR; 2048 return; 2049 } 2050 } 2051 2052 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 2053 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 2054 if (datalen > 0) { 2055 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 2056 free(data, M_CFISCSI); 2057 } 2058 CFISCSI_SESSION_LOCK(cs); 2059 icl_pdu_queue(ip); 2060 CFISCSI_SESSION_UNLOCK(cs); 2061 ci->status = CTL_ISCSI_OK; 2062 } 2063 2064 static void 2065 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 2066 { 2067 struct ctl_iscsi_receive_params *cirp; 2068 struct cfiscsi_session *cs; 2069 struct icl_pdu *ip; 2070 void *data; 2071 int error; 2072 2073 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2074 2075 mtx_lock(&cfiscsi_softc.lock); 2076 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2077 if (cs->cs_id == cirp->connection_id) 2078 break; 2079 } 2080 if (cs == NULL) { 2081 mtx_unlock(&cfiscsi_softc.lock); 2082 snprintf(ci->error_str, sizeof(ci->error_str), 2083 "connection not found"); 2084 ci->status = CTL_ISCSI_ERROR; 2085 return; 2086 } 2087 mtx_unlock(&cfiscsi_softc.lock); 2088 2089 #if 0 2090 if (is->is_login_phase == false) 2091 return (EBUSY); 2092 #endif 2093 2094 CFISCSI_SESSION_LOCK(cs); 2095 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2096 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2097 if (error != 0) { 2098 CFISCSI_SESSION_UNLOCK(cs); 2099 snprintf(ci->error_str, sizeof(ci->error_str), 2100 "interrupted by signal"); 2101 ci->status = CTL_ISCSI_ERROR; 2102 return; 2103 } 2104 } 2105 2106 if (cs->cs_terminating) { 2107 CFISCSI_SESSION_UNLOCK(cs); 2108 snprintf(ci->error_str, sizeof(ci->error_str), 2109 "connection terminating"); 2110 ci->status = CTL_ISCSI_ERROR; 2111 return; 2112 } 2113 ip = cs->cs_login_pdu; 2114 cs->cs_login_pdu = NULL; 2115 CFISCSI_SESSION_UNLOCK(cs); 2116 2117 if (ip->ip_data_len > cirp->data_segment_len) { 2118 icl_pdu_free(ip); 2119 snprintf(ci->error_str, sizeof(ci->error_str), 2120 "data segment too big"); 2121 ci->status = CTL_ISCSI_ERROR; 2122 return; 2123 } 2124 2125 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2126 if (ip->ip_data_len > 0) { 2127 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2128 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2129 copyout(data, cirp->data_segment, ip->ip_data_len); 2130 free(data, M_CFISCSI); 2131 } 2132 2133 icl_pdu_free(ip); 2134 ci->status = CTL_ISCSI_OK; 2135 } 2136 2137 #endif /* !ICL_KERNEL_PROXY */ 2138 2139 static void 2140 cfiscsi_ioctl_port_create(struct ctl_req *req) 2141 { 2142 struct cfiscsi_target *ct; 2143 struct ctl_port *port; 2144 const char *target, *alias, *val; 2145 struct scsi_vpd_id_descriptor *desc; 2146 int retval, len, idlen; 2147 uint16_t tag; 2148 2149 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2150 alias = dnvlist_get_string(req->args_nvl, "cfiscsi_target_alias", NULL); 2151 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2152 NULL); 2153 2154 if (target == NULL || val == NULL) { 2155 req->status = CTL_LUN_ERROR; 2156 snprintf(req->error_str, sizeof(req->error_str), 2157 "Missing required argument"); 2158 return; 2159 } 2160 2161 tag = strtoul(val, NULL, 0); 2162 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2163 if (ct == NULL) { 2164 req->status = CTL_LUN_ERROR; 2165 snprintf(req->error_str, sizeof(req->error_str), 2166 "failed to create target \"%s\"", target); 2167 return; 2168 } 2169 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2170 req->status = CTL_LUN_ERROR; 2171 snprintf(req->error_str, sizeof(req->error_str), 2172 "target \"%s\" for portal group tag %u already exists", 2173 target, tag); 2174 cfiscsi_target_release(ct); 2175 return; 2176 } 2177 port = &ct->ct_port; 2178 // WAT 2179 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2180 goto done; 2181 2182 port->frontend = &cfiscsi_frontend; 2183 port->port_type = CTL_PORT_ISCSI; 2184 /* XXX KDM what should the real number be here? */ 2185 port->num_requested_ctl_io = 4096; 2186 port->port_name = "iscsi"; 2187 port->physical_port = (int)tag; 2188 port->virtual_port = ct->ct_target_id; 2189 port->port_online = cfiscsi_online; 2190 port->port_offline = cfiscsi_offline; 2191 port->port_info = cfiscsi_info; 2192 port->onoff_arg = ct; 2193 port->fe_datamove = cfiscsi_datamove; 2194 port->fe_done = cfiscsi_done; 2195 port->targ_port = -1; 2196 port->options = nvlist_clone(req->args_nvl); 2197 2198 /* Generate Port ID. */ 2199 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2200 idlen = roundup2(idlen, 4); 2201 len = sizeof(struct scsi_vpd_device_id) + idlen; 2202 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2203 M_CTL, M_WAITOK | M_ZERO); 2204 port->port_devid->len = len; 2205 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2206 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2207 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2208 SVPD_ID_TYPE_SCSI_NAME; 2209 desc->length = idlen; 2210 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2211 2212 /* Generate Target ID. */ 2213 idlen = strlen(target) + 1; 2214 idlen = roundup2(idlen, 4); 2215 len = sizeof(struct scsi_vpd_device_id) + idlen; 2216 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2217 M_CTL, M_WAITOK | M_ZERO); 2218 port->target_devid->len = len; 2219 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2220 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2221 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2222 SVPD_ID_TYPE_SCSI_NAME; 2223 desc->length = idlen; 2224 strlcpy(desc->identifier, target, idlen); 2225 2226 retval = ctl_port_register(port); 2227 if (retval != 0) { 2228 free(port->port_devid, M_CFISCSI); 2229 free(port->target_devid, M_CFISCSI); 2230 cfiscsi_target_release(ct); 2231 req->status = CTL_LUN_ERROR; 2232 snprintf(req->error_str, sizeof(req->error_str), 2233 "ctl_port_register() failed with error %d", retval); 2234 return; 2235 } 2236 done: 2237 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2238 req->status = CTL_LUN_OK; 2239 req->result_nvl = nvlist_create(0); 2240 nvlist_add_number(req->result_nvl, "port_id", port->targ_port); 2241 } 2242 2243 static void 2244 cfiscsi_ioctl_port_remove(struct ctl_req *req) 2245 { 2246 struct cfiscsi_target *ct; 2247 const char *target, *val; 2248 uint16_t tag; 2249 2250 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2251 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2252 NULL); 2253 2254 if (target == NULL || val == NULL) { 2255 req->status = CTL_LUN_ERROR; 2256 snprintf(req->error_str, sizeof(req->error_str), 2257 "Missing required argument"); 2258 return; 2259 } 2260 2261 tag = strtoul(val, NULL, 0); 2262 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2263 if (ct == NULL) { 2264 req->status = CTL_LUN_ERROR; 2265 snprintf(req->error_str, sizeof(req->error_str), 2266 "can't find target \"%s\"", target); 2267 return; 2268 } 2269 2270 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2271 ctl_port_offline(&ct->ct_port); 2272 cfiscsi_target_release(ct); 2273 cfiscsi_target_release(ct); 2274 req->status = CTL_LUN_OK; 2275 } 2276 2277 static int 2278 cfiscsi_ioctl(struct cdev *dev, 2279 u_long cmd, caddr_t addr, int flag, struct thread *td) 2280 { 2281 struct ctl_iscsi *ci; 2282 struct ctl_req *req; 2283 2284 if (cmd == CTL_PORT_REQ) { 2285 req = (struct ctl_req *)addr; 2286 switch (req->reqtype) { 2287 case CTL_REQ_CREATE: 2288 cfiscsi_ioctl_port_create(req); 2289 break; 2290 case CTL_REQ_REMOVE: 2291 cfiscsi_ioctl_port_remove(req); 2292 break; 2293 default: 2294 req->status = CTL_LUN_ERROR; 2295 snprintf(req->error_str, sizeof(req->error_str), 2296 "Unsupported request type %d", req->reqtype); 2297 } 2298 return (0); 2299 } 2300 2301 if (cmd != CTL_ISCSI) 2302 return (ENOTTY); 2303 2304 ci = (struct ctl_iscsi *)addr; 2305 switch (ci->type) { 2306 case CTL_ISCSI_HANDOFF: 2307 cfiscsi_ioctl_handoff(ci); 2308 break; 2309 case CTL_ISCSI_LIST: 2310 cfiscsi_ioctl_list(ci); 2311 break; 2312 case CTL_ISCSI_LOGOUT: 2313 cfiscsi_ioctl_logout(ci); 2314 break; 2315 case CTL_ISCSI_TERMINATE: 2316 cfiscsi_ioctl_terminate(ci); 2317 break; 2318 case CTL_ISCSI_LIMITS: 2319 cfiscsi_ioctl_limits(ci); 2320 break; 2321 #ifdef ICL_KERNEL_PROXY 2322 case CTL_ISCSI_LISTEN: 2323 cfiscsi_ioctl_listen(ci); 2324 break; 2325 case CTL_ISCSI_ACCEPT: 2326 cfiscsi_ioctl_accept(ci); 2327 break; 2328 case CTL_ISCSI_SEND: 2329 cfiscsi_ioctl_send(ci); 2330 break; 2331 case CTL_ISCSI_RECEIVE: 2332 cfiscsi_ioctl_receive(ci); 2333 break; 2334 #else 2335 case CTL_ISCSI_LISTEN: 2336 case CTL_ISCSI_ACCEPT: 2337 case CTL_ISCSI_SEND: 2338 case CTL_ISCSI_RECEIVE: 2339 ci->status = CTL_ISCSI_ERROR; 2340 snprintf(ci->error_str, sizeof(ci->error_str), 2341 "%s: CTL compiled without ICL_KERNEL_PROXY", 2342 __func__); 2343 break; 2344 #endif /* !ICL_KERNEL_PROXY */ 2345 default: 2346 ci->status = CTL_ISCSI_ERROR; 2347 snprintf(ci->error_str, sizeof(ci->error_str), 2348 "%s: invalid iSCSI request type %d", __func__, ci->type); 2349 break; 2350 } 2351 2352 return (0); 2353 } 2354 2355 static void 2356 cfiscsi_target_hold(struct cfiscsi_target *ct) 2357 { 2358 2359 refcount_acquire(&ct->ct_refcount); 2360 } 2361 2362 static void 2363 cfiscsi_target_release(struct cfiscsi_target *ct) 2364 { 2365 struct cfiscsi_softc *softc; 2366 2367 softc = ct->ct_softc; 2368 mtx_lock(&softc->lock); 2369 if (refcount_release(&ct->ct_refcount)) { 2370 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2371 mtx_unlock(&softc->lock); 2372 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2373 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2374 if (ctl_port_deregister(&ct->ct_port) != 0) 2375 printf("%s: ctl_port_deregister() failed\n", 2376 __func__); 2377 } 2378 free(ct, M_CFISCSI); 2379 2380 return; 2381 } 2382 mtx_unlock(&softc->lock); 2383 } 2384 2385 static struct cfiscsi_target * 2386 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2387 { 2388 struct cfiscsi_target *ct; 2389 2390 mtx_lock(&softc->lock); 2391 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2392 if (ct->ct_tag != tag || 2393 strcmp(name, ct->ct_name) != 0 || 2394 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2395 continue; 2396 cfiscsi_target_hold(ct); 2397 mtx_unlock(&softc->lock); 2398 return (ct); 2399 } 2400 mtx_unlock(&softc->lock); 2401 2402 return (NULL); 2403 } 2404 2405 static struct cfiscsi_target * 2406 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2407 const char *alias, uint16_t tag) 2408 { 2409 struct cfiscsi_target *ct, *newct; 2410 2411 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2412 return (NULL); 2413 2414 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2415 2416 mtx_lock(&softc->lock); 2417 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2418 if (ct->ct_tag != tag || 2419 strcmp(name, ct->ct_name) != 0 || 2420 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2421 continue; 2422 cfiscsi_target_hold(ct); 2423 mtx_unlock(&softc->lock); 2424 free(newct, M_CFISCSI); 2425 return (ct); 2426 } 2427 2428 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2429 if (alias != NULL) 2430 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2431 newct->ct_tag = tag; 2432 refcount_init(&newct->ct_refcount, 1); 2433 newct->ct_softc = softc; 2434 if (TAILQ_EMPTY(&softc->targets)) 2435 softc->last_target_id = 0; 2436 newct->ct_target_id = ++softc->last_target_id; 2437 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2438 mtx_unlock(&softc->lock); 2439 2440 return (newct); 2441 } 2442 2443 static void 2444 cfiscsi_pdu_done(struct icl_pdu *ip, int error) 2445 { 2446 2447 if (error != 0) 2448 ; // XXX: Do something on error? 2449 ((ctl_ref)ip->ip_prv0)(ip->ip_prv1, -1); 2450 } 2451 2452 static void 2453 cfiscsi_datamove_in(union ctl_io *io) 2454 { 2455 struct cfiscsi_session *cs; 2456 struct icl_pdu *request, *response; 2457 const struct iscsi_bhs_scsi_command *bhssc; 2458 struct iscsi_bhs_data_in *bhsdi; 2459 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2460 size_t len, expected_len, sg_len, buffer_offset; 2461 size_t max_send_data_segment_length; 2462 const char *sg_addr; 2463 icl_pdu_cb cb; 2464 int ctl_sg_count, error, i; 2465 2466 request = PRIV_REQUEST(io); 2467 cs = PDU_SESSION(request); 2468 2469 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2470 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2471 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2472 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2473 2474 if (io->scsiio.kern_sg_entries > 0) { 2475 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2476 ctl_sg_count = io->scsiio.kern_sg_entries; 2477 } else { 2478 ctl_sglist = &ctl_sg_entry; 2479 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2480 ctl_sglist->len = io->scsiio.kern_data_len; 2481 ctl_sg_count = 1; 2482 } 2483 2484 /* 2485 * This is the offset within the current SCSI command; for the first 2486 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2487 * it will be the sum of lengths of previous ones. 2488 */ 2489 buffer_offset = io->scsiio.kern_rel_offset; 2490 2491 /* 2492 * This is the transfer length expected by the initiator. It can be 2493 * different from the amount of data from the SCSI point of view. 2494 */ 2495 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2496 2497 /* 2498 * If the transfer is outside of expected length -- we are done. 2499 */ 2500 if (buffer_offset >= expected_len) { 2501 #if 0 2502 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2503 "already sent the expected len", buffer_offset); 2504 #endif 2505 ctl_datamove_done(io, true); 2506 return; 2507 } 2508 2509 if (io->scsiio.kern_data_ref != NULL) 2510 cb = cfiscsi_pdu_done; 2511 else 2512 cb = NULL; 2513 2514 i = 0; 2515 sg_addr = NULL; 2516 sg_len = 0; 2517 response = NULL; 2518 bhsdi = NULL; 2519 if (cs->cs_conn->ic_hw_isomax != 0) 2520 max_send_data_segment_length = cs->cs_conn->ic_hw_isomax; 2521 else 2522 max_send_data_segment_length = 2523 cs->cs_conn->ic_max_send_data_segment_length; 2524 for (;;) { 2525 if (response == NULL) { 2526 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2527 if (response == NULL) { 2528 CFISCSI_SESSION_WARN(cs, "failed to " 2529 "allocate memory; dropping connection"); 2530 ctl_set_busy(&io->scsiio); 2531 ctl_datamove_done(io, true); 2532 cfiscsi_session_terminate(cs); 2533 return; 2534 } 2535 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2536 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2537 bhsdi->bhsdi_initiator_task_tag = 2538 bhssc->bhssc_initiator_task_tag; 2539 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2540 bhsdi->bhsdi_datasn = htonl(PRIV_EXPDATASN(io)); 2541 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2542 } 2543 2544 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2545 if (sg_len == 0) { 2546 sg_addr = ctl_sglist[i].addr; 2547 sg_len = ctl_sglist[i].len; 2548 KASSERT(sg_len > 0, ("sg_len <= 0")); 2549 } 2550 2551 len = sg_len; 2552 2553 /* 2554 * Truncate to maximum data segment length. 2555 */ 2556 KASSERT(response->ip_data_len < max_send_data_segment_length, 2557 ("ip_data_len %zd >= max_send_data_segment_length %zd", 2558 response->ip_data_len, max_send_data_segment_length)); 2559 if (response->ip_data_len + len > max_send_data_segment_length) { 2560 len = max_send_data_segment_length - response->ip_data_len; 2561 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2562 len, sg_len)); 2563 } 2564 2565 /* 2566 * Truncate to expected data transfer length. 2567 */ 2568 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2569 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2570 buffer_offset, response->ip_data_len, expected_len)); 2571 if (buffer_offset + response->ip_data_len + len > expected_len) { 2572 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2573 "to expected data transfer length %zd", 2574 buffer_offset + response->ip_data_len + len, expected_len); 2575 len = expected_len - (buffer_offset + response->ip_data_len); 2576 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2577 len, sg_len)); 2578 } 2579 2580 error = icl_pdu_append_data(response, sg_addr, len, 2581 M_NOWAIT | (cb ? ICL_NOCOPY : 0)); 2582 if (error != 0) { 2583 CFISCSI_SESSION_WARN(cs, "failed to " 2584 "allocate memory; dropping connection"); 2585 icl_pdu_free(response); 2586 ctl_set_busy(&io->scsiio); 2587 ctl_datamove_done(io, true); 2588 cfiscsi_session_terminate(cs); 2589 return; 2590 } 2591 sg_addr += len; 2592 sg_len -= len; 2593 io->scsiio.kern_data_resid -= len; 2594 2595 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2596 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2597 buffer_offset, response->ip_data_len, expected_len)); 2598 if (buffer_offset + response->ip_data_len == expected_len) { 2599 /* 2600 * Already have the amount of data the initiator wanted. 2601 */ 2602 break; 2603 } 2604 2605 if (sg_len == 0) { 2606 /* 2607 * End of scatter-gather segment; 2608 * proceed to the next one... 2609 */ 2610 if (i == ctl_sg_count - 1) { 2611 /* 2612 * ... unless this was the last one. 2613 */ 2614 break; 2615 } 2616 i++; 2617 } 2618 2619 if (response->ip_data_len == max_send_data_segment_length) { 2620 /* 2621 * Can't stuff more data into the current PDU; 2622 * queue it. Note that's not enough to check 2623 * for kern_data_resid == 0 instead; there 2624 * may be several Data-In PDUs for the final 2625 * call to cfiscsi_datamove(), and we want 2626 * to set the F flag only on the last of them. 2627 */ 2628 buffer_offset += response->ip_data_len; 2629 if (buffer_offset == io->scsiio.kern_total_len || 2630 buffer_offset == expected_len) { 2631 buffer_offset -= response->ip_data_len; 2632 break; 2633 } 2634 PRIV_EXPDATASN(io) += howmany(response->ip_data_len, 2635 cs->cs_conn->ic_max_send_data_segment_length); 2636 if (cb != NULL) { 2637 response->ip_prv0 = io->scsiio.kern_data_ref; 2638 response->ip_prv1 = io->scsiio.kern_data_arg; 2639 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2640 } 2641 cfiscsi_pdu_queue_cb(response, cb); 2642 response = NULL; 2643 bhsdi = NULL; 2644 } 2645 } 2646 if (response != NULL) { 2647 buffer_offset += response->ip_data_len; 2648 if (buffer_offset == io->scsiio.kern_total_len || 2649 buffer_offset == expected_len) { 2650 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2651 if (io->io_hdr.status == CTL_SUCCESS) { 2652 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2653 if (io->scsiio.kern_total_len < 2654 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2655 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2656 bhsdi->bhsdi_residual_count = 2657 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2658 io->scsiio.kern_total_len); 2659 } else if (io->scsiio.kern_total_len > 2660 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2661 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2662 bhsdi->bhsdi_residual_count = 2663 htonl(io->scsiio.kern_total_len - 2664 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2665 } 2666 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2667 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2668 } 2669 } 2670 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2671 PRIV_EXPDATASN(io) += howmany(response->ip_data_len, 2672 cs->cs_conn->ic_max_send_data_segment_length); 2673 if (cb != NULL) { 2674 response->ip_prv0 = io->scsiio.kern_data_ref; 2675 response->ip_prv1 = io->scsiio.kern_data_arg; 2676 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2677 } 2678 cfiscsi_pdu_queue_cb(response, cb); 2679 } 2680 2681 ctl_datamove_done(io, true); 2682 } 2683 2684 static void 2685 cfiscsi_datamove_out(union ctl_io *io) 2686 { 2687 struct cfiscsi_session *cs; 2688 struct icl_pdu *request, *response; 2689 const struct iscsi_bhs_scsi_command *bhssc; 2690 struct iscsi_bhs_r2t *bhsr2t; 2691 struct cfiscsi_data_wait *cdw; 2692 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2693 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2694 uint32_t target_transfer_tag; 2695 bool done; 2696 2697 request = PRIV_REQUEST(io); 2698 cs = PDU_SESSION(request); 2699 2700 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2701 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2702 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2703 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2704 2705 /* 2706 * Complete write underflow. Not a single byte to read. Return. 2707 */ 2708 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2709 if (io->scsiio.kern_rel_offset >= expected_len) { 2710 ctl_datamove_done(io, true); 2711 return; 2712 } 2713 2714 datamove_len = MIN(io->scsiio.kern_data_len, 2715 expected_len - io->scsiio.kern_rel_offset); 2716 2717 target_transfer_tag = 2718 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2719 if (target_transfer_tag == 0xffffffff) { 2720 target_transfer_tag = 2721 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2722 } 2723 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2724 &target_transfer_tag); 2725 if (cdw == NULL) { 2726 CFISCSI_SESSION_WARN(cs, "failed to " 2727 "allocate memory; dropping connection"); 2728 ctl_set_busy(&io->scsiio); 2729 ctl_datamove_done(io, true); 2730 cfiscsi_session_terminate(cs); 2731 return; 2732 } 2733 #if 0 2734 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2735 "task tag 0x%x, target transfer tag 0x%x", 2736 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2737 #endif 2738 2739 cdw->cdw_ctl_io = io; 2740 cdw->cdw_target_transfer_tag = target_transfer_tag; 2741 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2742 cdw->cdw_r2t_end = datamove_len; 2743 cdw->cdw_datasn = 0; 2744 2745 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2746 if (io->scsiio.kern_sg_entries > 0) { 2747 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2748 } else { 2749 ctl_sglist = &ctl_sg_entry; 2750 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2751 ctl_sglist->len = datamove_len; 2752 } 2753 cdw->cdw_sg_index = 0; 2754 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2755 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2756 r2t_off = io->scsiio.ext_data_filled; 2757 while (r2t_off > 0) { 2758 if (r2t_off >= cdw->cdw_sg_len) { 2759 r2t_off -= cdw->cdw_sg_len; 2760 cdw->cdw_sg_index++; 2761 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2762 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2763 continue; 2764 } 2765 cdw->cdw_sg_addr += r2t_off; 2766 cdw->cdw_sg_len -= r2t_off; 2767 r2t_off = 0; 2768 } 2769 2770 if (cs->cs_immediate_data && 2771 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2772 icl_pdu_data_segment_length(request)) { 2773 done = cfiscsi_handle_data_segment(request, cdw); 2774 if (done) { 2775 cfiscsi_data_wait_free(cs, cdw); 2776 ctl_datamove_done(io, true); 2777 return; 2778 } 2779 } 2780 2781 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2782 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2783 cs->cs_max_burst_length); 2784 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2785 2786 CFISCSI_SESSION_LOCK(cs); 2787 if (cs->cs_terminating_tasks) { 2788 CFISCSI_SESSION_UNLOCK(cs); 2789 KASSERT((io->io_hdr.flags & CTL_FLAG_ABORT) != 0, 2790 ("%s: I/O request %p on termating session %p not aborted", 2791 __func__, io, cs)); 2792 CFISCSI_SESSION_WARN(cs, "aborting data_wait for aborted I/O"); 2793 cfiscsi_data_wait_abort(cs, cdw, 44); 2794 return; 2795 } 2796 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2797 CFISCSI_SESSION_UNLOCK(cs); 2798 2799 /* 2800 * XXX: We should limit the number of outstanding R2T PDUs 2801 * per task to MaxOutstandingR2T. 2802 */ 2803 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2804 if (response == NULL) { 2805 CFISCSI_SESSION_WARN(cs, "failed to " 2806 "allocate memory; dropping connection"); 2807 ctl_set_busy(&io->scsiio); 2808 ctl_datamove_done(io, true); 2809 cfiscsi_session_terminate(cs); 2810 return; 2811 } 2812 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2813 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2814 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2815 bhsr2t->bhsr2t_flags = 0x80; 2816 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2817 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2818 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2819 /* 2820 * XXX: Here we assume that cfiscsi_datamove() won't ever 2821 * be running concurrently on several CPUs for a given 2822 * command. 2823 */ 2824 bhsr2t->bhsr2t_r2tsn = htonl(PRIV_R2TSN(io)++); 2825 /* 2826 * This is the offset within the current SCSI command; 2827 * i.e. for the first call of datamove(), it will be 0, 2828 * and for subsequent ones it will be the sum of lengths 2829 * of previous ones. 2830 * 2831 * The ext_data_filled is to account for unsolicited 2832 * (immediate) data that might have already arrived. 2833 */ 2834 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2835 /* 2836 * This is the total length (sum of S/G lengths) this call 2837 * to cfiscsi_datamove() is supposed to handle, limited by 2838 * MaxBurstLength. 2839 */ 2840 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2841 cfiscsi_pdu_queue(response); 2842 } 2843 2844 static void 2845 cfiscsi_datamove(union ctl_io *io) 2846 { 2847 2848 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2849 cfiscsi_datamove_in(io); 2850 else { 2851 /* We hadn't received anything during this datamove yet. */ 2852 io->scsiio.ext_data_filled = 0; 2853 cfiscsi_datamove_out(io); 2854 } 2855 } 2856 2857 static void 2858 cfiscsi_scsi_command_done(union ctl_io *io) 2859 { 2860 struct icl_pdu *request, *response; 2861 struct iscsi_bhs_scsi_command *bhssc; 2862 struct iscsi_bhs_scsi_response *bhssr; 2863 #ifdef DIAGNOSTIC 2864 struct cfiscsi_data_wait *cdw; 2865 struct cfiscsi_session *cs; 2866 #endif 2867 uint16_t sense_length; 2868 2869 request = PRIV_REQUEST(io); 2870 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2871 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2872 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2873 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2874 2875 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2876 // bhssc->bhssc_initiator_task_tag); 2877 2878 #ifdef DIAGNOSTIC 2879 cs = PDU_SESSION(request); 2880 CFISCSI_SESSION_LOCK(cs); 2881 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2882 KASSERT(bhssc->bhssc_initiator_task_tag != 2883 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2884 CFISCSI_SESSION_UNLOCK(cs); 2885 #endif 2886 2887 /* 2888 * Do not return status for aborted commands. 2889 * There are exceptions, but none supported by CTL yet. 2890 */ 2891 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2892 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2893 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2894 ctl_free_io(io); 2895 icl_pdu_free(request); 2896 return; 2897 } 2898 2899 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2900 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2901 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2902 bhssr->bhssr_flags = 0x80; 2903 /* 2904 * XXX: We don't deal with bidirectional under/overflows; 2905 * does anything actually support those? 2906 */ 2907 if (io->scsiio.kern_total_len < 2908 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2909 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2910 bhssr->bhssr_residual_count = 2911 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2912 io->scsiio.kern_total_len); 2913 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2914 // ntohl(bhssr->bhssr_residual_count)); 2915 } else if (io->scsiio.kern_total_len > 2916 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2917 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2918 bhssr->bhssr_residual_count = htonl(io->scsiio.kern_total_len - 2919 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2920 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2921 // ntohl(bhssr->bhssr_residual_count)); 2922 } 2923 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2924 bhssr->bhssr_status = io->scsiio.scsi_status; 2925 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2926 bhssr->bhssr_expdatasn = htonl(PRIV_EXPDATASN(io)); 2927 2928 if (io->scsiio.sense_len > 0) { 2929 #if 0 2930 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2931 io->scsiio.sense_len); 2932 #endif 2933 sense_length = htons(io->scsiio.sense_len); 2934 icl_pdu_append_data(response, 2935 &sense_length, sizeof(sense_length), M_WAITOK); 2936 icl_pdu_append_data(response, 2937 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2938 } 2939 2940 ctl_free_io(io); 2941 icl_pdu_free(request); 2942 cfiscsi_pdu_queue(response); 2943 } 2944 2945 static void 2946 cfiscsi_task_management_done(union ctl_io *io) 2947 { 2948 struct icl_pdu *request, *response; 2949 struct iscsi_bhs_task_management_request *bhstmr; 2950 struct iscsi_bhs_task_management_response *bhstmr2; 2951 struct cfiscsi_data_wait *cdw, *tmpcdw; 2952 struct cfiscsi_session *cs, *tcs; 2953 struct cfiscsi_softc *softc; 2954 int cold_reset = 0; 2955 2956 request = PRIV_REQUEST(io); 2957 cs = PDU_SESSION(request); 2958 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2959 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2960 ISCSI_BHS_OPCODE_TASK_REQUEST, 2961 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2962 2963 #if 0 2964 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2965 bhstmr->bhstmr_initiator_task_tag, 2966 bhstmr->bhstmr_referenced_task_tag); 2967 #endif 2968 2969 if ((bhstmr->bhstmr_function & ~0x80) == 2970 BHSTMR_FUNCTION_ABORT_TASK) { 2971 /* 2972 * Make sure we no longer wait for Data-Out for this command. 2973 */ 2974 CFISCSI_SESSION_LOCK(cs); 2975 TAILQ_FOREACH_SAFE(cdw, 2976 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2977 if (bhstmr->bhstmr_referenced_task_tag != 2978 cdw->cdw_initiator_task_tag) 2979 continue; 2980 2981 #if 0 2982 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2983 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2984 #endif 2985 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2986 cdw, cdw_next); 2987 cfiscsi_data_wait_abort(cs, cdw, 43); 2988 } 2989 CFISCSI_SESSION_UNLOCK(cs); 2990 } 2991 if ((bhstmr->bhstmr_function & ~0x80) == 2992 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2993 io->io_hdr.status == CTL_SUCCESS) 2994 cold_reset = 1; 2995 2996 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2997 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2998 response->ip_bhs; 2999 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 3000 bhstmr2->bhstmr_flags = 0x80; 3001 switch (io->taskio.task_status) { 3002 case CTL_TASK_FUNCTION_COMPLETE: 3003 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 3004 break; 3005 case CTL_TASK_FUNCTION_SUCCEEDED: 3006 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 3007 break; 3008 case CTL_TASK_LUN_DOES_NOT_EXIST: 3009 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 3010 break; 3011 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 3012 default: 3013 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 3014 break; 3015 } 3016 memcpy(bhstmr2->bhstmr_additional_reponse_information, 3017 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 3018 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 3019 3020 ctl_free_io(io); 3021 icl_pdu_free(request); 3022 cfiscsi_pdu_queue(response); 3023 3024 if (cold_reset) { 3025 softc = cs->cs_target->ct_softc; 3026 mtx_lock(&softc->lock); 3027 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 3028 if (tcs->cs_target == cs->cs_target) 3029 cfiscsi_session_terminate(tcs); 3030 } 3031 mtx_unlock(&softc->lock); 3032 } 3033 } 3034 3035 static void 3036 cfiscsi_done(union ctl_io *io) 3037 { 3038 struct icl_pdu *request; 3039 struct cfiscsi_session *cs; 3040 3041 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 3042 ("invalid CTL status %#x", io->io_hdr.status)); 3043 3044 if (io->io_hdr.io_type == CTL_IO_TASK && 3045 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 3046 /* 3047 * Implicit task termination has just completed; nothing to do. 3048 */ 3049 cs = PRIV_REQUEST(io); 3050 cs->cs_tasks_aborted = true; 3051 refcount_release(&cs->cs_outstanding_ctl_pdus); 3052 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 3053 ctl_free_io(io); 3054 return; 3055 } 3056 3057 request = PRIV_REQUEST(io); 3058 cs = PDU_SESSION(request); 3059 3060 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 3061 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 3062 cfiscsi_scsi_command_done(io); 3063 break; 3064 case ISCSI_BHS_OPCODE_TASK_REQUEST: 3065 cfiscsi_task_management_done(io); 3066 break; 3067 default: 3068 panic("cfiscsi_done called with wrong opcode 0x%x", 3069 request->ip_bhs->bhs_opcode); 3070 } 3071 3072 refcount_release(&cs->cs_outstanding_ctl_pdus); 3073 } 3074