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_queue(io); 561 if (error != CTL_RETVAL_COMPLETE) { 562 CFISCSI_SESSION_WARN(cs, "ctl_queue() 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_queue(io); 683 if (error != CTL_RETVAL_COMPLETE) { 684 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; " 685 "dropping connection", error); 686 ctl_free_io(io); 687 refcount_release(&cs->cs_outstanding_ctl_pdus); 688 icl_pdu_free(request); 689 cfiscsi_session_terminate(cs); 690 } 691 } 692 693 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++; 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 io->scsiio.be_move_done(io); 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, io, target_transfer_tagp, 1087 &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_session_terminate_tasks(struct cfiscsi_session *cs) 1113 { 1114 struct cfiscsi_data_wait *cdw; 1115 union ctl_io *io; 1116 int error, last, wait; 1117 1118 if (cs->cs_target == NULL) 1119 return; /* No target yet, so nothing to do. */ 1120 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1121 ctl_zero_io(io); 1122 PRIV_REQUEST(io) = cs; 1123 io->io_hdr.io_type = CTL_IO_TASK; 1124 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1125 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1126 io->io_hdr.nexus.targ_lun = 0; 1127 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1128 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1129 wait = cs->cs_outstanding_ctl_pdus; 1130 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1131 error = ctl_queue(io); 1132 if (error != CTL_RETVAL_COMPLETE) { 1133 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error); 1134 refcount_release(&cs->cs_outstanding_ctl_pdus); 1135 ctl_free_io(io); 1136 } 1137 1138 CFISCSI_SESSION_LOCK(cs); 1139 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1140 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1141 CFISCSI_SESSION_UNLOCK(cs); 1142 /* 1143 * Set nonzero port status; this prevents backends from 1144 * assuming that the data transfer actually succeeded 1145 * and writing uninitialized data to disk. 1146 */ 1147 cdw->cdw_ctl_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1148 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 42; 1149 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 1150 cfiscsi_data_wait_free(cs, cdw); 1151 CFISCSI_SESSION_LOCK(cs); 1152 } 1153 CFISCSI_SESSION_UNLOCK(cs); 1154 1155 /* 1156 * Wait for CTL to terminate all the tasks. 1157 */ 1158 if (wait > 0) 1159 CFISCSI_SESSION_WARN(cs, 1160 "waiting for CTL to terminate %d tasks", wait); 1161 for (;;) { 1162 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1163 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1164 if (last != 0) 1165 break; 1166 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1167 0, "cfiscsi_terminate", hz / 100); 1168 } 1169 if (wait > 0) 1170 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1171 } 1172 1173 static void 1174 cfiscsi_maintenance_thread(void *arg) 1175 { 1176 struct cfiscsi_session *cs; 1177 1178 cs = arg; 1179 1180 for (;;) { 1181 CFISCSI_SESSION_LOCK(cs); 1182 if (cs->cs_terminating == false || cs->cs_handoff_in_progress) 1183 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1184 CFISCSI_SESSION_UNLOCK(cs); 1185 1186 if (cs->cs_terminating && cs->cs_handoff_in_progress == false) { 1187 /* 1188 * We used to wait up to 30 seconds to deliver queued 1189 * PDUs to the initiator. We also tried hard to deliver 1190 * SCSI Responses for the aborted PDUs. We don't do 1191 * that anymore. We might need to revisit that. 1192 */ 1193 callout_drain(&cs->cs_callout); 1194 icl_conn_close(cs->cs_conn); 1195 1196 /* 1197 * At this point ICL receive thread is no longer 1198 * running; no new tasks can be queued. 1199 */ 1200 cfiscsi_session_terminate_tasks(cs); 1201 cfiscsi_session_delete(cs); 1202 kthread_exit(); 1203 return; 1204 } 1205 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1206 } 1207 } 1208 1209 static void 1210 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1211 { 1212 1213 cs->cs_terminating = true; 1214 cv_signal(&cs->cs_maintenance_cv); 1215 #ifdef ICL_KERNEL_PROXY 1216 cv_signal(&cs->cs_login_cv); 1217 #endif 1218 } 1219 1220 static int 1221 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1222 { 1223 struct cfiscsi_target *ct; 1224 char *name; 1225 int i; 1226 1227 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1228 1229 ct = cs->cs_target; 1230 name = strdup(cs->cs_initiator_id, M_CTL); 1231 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1232 if (i < 0) { 1233 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1234 i); 1235 cs->cs_ctl_initid = -1; 1236 return (1); 1237 } 1238 cs->cs_ctl_initid = i; 1239 #if 0 1240 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1241 #endif 1242 1243 return (0); 1244 } 1245 1246 static void 1247 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1248 { 1249 int error; 1250 1251 if (cs->cs_ctl_initid == -1) 1252 return; 1253 1254 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1255 if (error != 0) { 1256 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1257 error); 1258 } 1259 cs->cs_ctl_initid = -1; 1260 } 1261 1262 static struct cfiscsi_session * 1263 cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1264 { 1265 struct cfiscsi_session *cs; 1266 int error; 1267 1268 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1269 if (cs == NULL) { 1270 CFISCSI_WARN("malloc failed"); 1271 return (NULL); 1272 } 1273 cs->cs_ctl_initid = -1; 1274 1275 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1276 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1277 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1278 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1279 #ifdef ICL_KERNEL_PROXY 1280 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1281 #endif 1282 1283 /* 1284 * The purpose of this is to avoid racing with session shutdown. 1285 * Otherwise we could have the maintenance thread call icl_conn_close() 1286 * before we call icl_conn_handoff(). 1287 */ 1288 cs->cs_handoff_in_progress = true; 1289 1290 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); 1291 if (cs->cs_conn == NULL) { 1292 free(cs, M_CFISCSI); 1293 return (NULL); 1294 } 1295 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1296 cs->cs_conn->ic_error = cfiscsi_error_callback; 1297 cs->cs_conn->ic_prv0 = cs; 1298 1299 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1300 if (error != 0) { 1301 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1302 free(cs, M_CFISCSI); 1303 return (NULL); 1304 } 1305 1306 mtx_lock(&softc->lock); 1307 cs->cs_id = ++softc->last_session_id; 1308 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1309 mtx_unlock(&softc->lock); 1310 1311 /* 1312 * Start pinging the initiator. 1313 */ 1314 callout_init(&cs->cs_callout, 1); 1315 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1316 1317 return (cs); 1318 } 1319 1320 static void 1321 cfiscsi_session_delete(struct cfiscsi_session *cs) 1322 { 1323 struct cfiscsi_softc *softc; 1324 1325 softc = &cfiscsi_softc; 1326 1327 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1328 ("destroying session with outstanding CTL pdus")); 1329 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1330 ("destroying session with non-empty queue")); 1331 1332 mtx_lock(&softc->lock); 1333 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1334 mtx_unlock(&softc->lock); 1335 1336 cfiscsi_session_unregister_initiator(cs); 1337 if (cs->cs_target != NULL) 1338 cfiscsi_target_release(cs->cs_target); 1339 icl_conn_close(cs->cs_conn); 1340 icl_conn_free(cs->cs_conn); 1341 free(cs, M_CFISCSI); 1342 cv_signal(&softc->sessions_cv); 1343 } 1344 1345 static int 1346 cfiscsi_init(void) 1347 { 1348 struct cfiscsi_softc *softc; 1349 1350 softc = &cfiscsi_softc; 1351 bzero(softc, sizeof(*softc)); 1352 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1353 1354 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1355 #ifdef ICL_KERNEL_PROXY 1356 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1357 #endif 1358 TAILQ_INIT(&softc->sessions); 1359 TAILQ_INIT(&softc->targets); 1360 1361 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1362 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1363 UMA_ALIGN_PTR, 0); 1364 1365 return (0); 1366 } 1367 1368 static int 1369 cfiscsi_shutdown(void) 1370 { 1371 struct cfiscsi_softc *softc = &cfiscsi_softc; 1372 1373 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) 1374 return (EBUSY); 1375 1376 uma_zdestroy(cfiscsi_data_wait_zone); 1377 #ifdef ICL_KERNEL_PROXY 1378 cv_destroy(&softc->accept_cv); 1379 #endif 1380 cv_destroy(&softc->sessions_cv); 1381 mtx_destroy(&softc->lock); 1382 return (0); 1383 } 1384 1385 #ifdef ICL_KERNEL_PROXY 1386 static void 1387 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1388 { 1389 struct cfiscsi_session *cs; 1390 1391 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1392 if (cs == NULL) { 1393 CFISCSI_WARN("failed to create session"); 1394 return; 1395 } 1396 1397 icl_conn_handoff_sock(cs->cs_conn, so); 1398 cs->cs_initiator_sa = sa; 1399 cs->cs_portal_id = portal_id; 1400 cs->cs_handoff_in_progress = false; 1401 cs->cs_waiting_for_ctld = true; 1402 cv_signal(&cfiscsi_softc.accept_cv); 1403 1404 CFISCSI_SESSION_LOCK(cs); 1405 /* 1406 * Wake up the maintenance thread if we got scheduled for termination 1407 * somewhere between cfiscsi_session_new() and icl_conn_handoff_sock(). 1408 */ 1409 if (cs->cs_terminating) 1410 cfiscsi_session_terminate(cs); 1411 CFISCSI_SESSION_UNLOCK(cs); 1412 } 1413 #endif 1414 1415 static void 1416 cfiscsi_online(void *arg) 1417 { 1418 struct cfiscsi_softc *softc; 1419 struct cfiscsi_target *ct; 1420 int online; 1421 1422 ct = (struct cfiscsi_target *)arg; 1423 softc = ct->ct_softc; 1424 1425 mtx_lock(&softc->lock); 1426 if (ct->ct_online) { 1427 mtx_unlock(&softc->lock); 1428 return; 1429 } 1430 ct->ct_online = 1; 1431 online = softc->online++; 1432 mtx_unlock(&softc->lock); 1433 if (online > 0) 1434 return; 1435 1436 #ifdef ICL_KERNEL_PROXY 1437 if (softc->listener != NULL) 1438 icl_listen_free(softc->listener); 1439 softc->listener = icl_listen_new(cfiscsi_accept); 1440 #endif 1441 } 1442 1443 static void 1444 cfiscsi_offline(void *arg) 1445 { 1446 struct cfiscsi_softc *softc; 1447 struct cfiscsi_target *ct; 1448 struct cfiscsi_session *cs; 1449 int error, online; 1450 1451 ct = (struct cfiscsi_target *)arg; 1452 softc = ct->ct_softc; 1453 1454 mtx_lock(&softc->lock); 1455 if (!ct->ct_online) { 1456 mtx_unlock(&softc->lock); 1457 return; 1458 } 1459 ct->ct_online = 0; 1460 online = --softc->online; 1461 1462 do { 1463 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1464 if (cs->cs_target == ct) 1465 cfiscsi_session_terminate(cs); 1466 } 1467 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1468 if (cs->cs_target == ct) 1469 break; 1470 } 1471 if (cs != NULL) { 1472 error = cv_wait_sig(&softc->sessions_cv, &softc->lock); 1473 if (error != 0) { 1474 CFISCSI_SESSION_DEBUG(cs, 1475 "cv_wait failed with error %d\n", error); 1476 break; 1477 } 1478 } 1479 } while (cs != NULL && ct->ct_online == 0); 1480 mtx_unlock(&softc->lock); 1481 if (online > 0) 1482 return; 1483 1484 #ifdef ICL_KERNEL_PROXY 1485 icl_listen_free(softc->listener); 1486 softc->listener = NULL; 1487 #endif 1488 } 1489 1490 static int 1491 cfiscsi_info(void *arg, struct sbuf *sb) 1492 { 1493 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1494 int retval; 1495 1496 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1497 ct->ct_state); 1498 return (retval); 1499 } 1500 1501 static void 1502 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1503 { 1504 struct cfiscsi_softc *softc; 1505 struct cfiscsi_session *cs, *cs2; 1506 struct cfiscsi_target *ct; 1507 struct ctl_iscsi_handoff_params *cihp; 1508 int error; 1509 1510 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1511 softc = &cfiscsi_softc; 1512 1513 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1514 cihp->initiator_name, cihp->initiator_addr, 1515 cihp->target_name); 1516 1517 ct = cfiscsi_target_find(softc, cihp->target_name, 1518 cihp->portal_group_tag); 1519 if (ct == NULL) { 1520 ci->status = CTL_ISCSI_ERROR; 1521 snprintf(ci->error_str, sizeof(ci->error_str), 1522 "%s: target not found", __func__); 1523 return; 1524 } 1525 1526 #ifdef ICL_KERNEL_PROXY 1527 if (cihp->socket > 0 && cihp->connection_id > 0) { 1528 snprintf(ci->error_str, sizeof(ci->error_str), 1529 "both socket and connection_id set"); 1530 ci->status = CTL_ISCSI_ERROR; 1531 cfiscsi_target_release(ct); 1532 return; 1533 } 1534 if (cihp->socket == 0) { 1535 mtx_lock(&cfiscsi_softc.lock); 1536 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1537 if (cs->cs_id == cihp->connection_id) 1538 break; 1539 } 1540 if (cs == NULL) { 1541 mtx_unlock(&cfiscsi_softc.lock); 1542 snprintf(ci->error_str, sizeof(ci->error_str), 1543 "connection not found"); 1544 ci->status = CTL_ISCSI_ERROR; 1545 cfiscsi_target_release(ct); 1546 return; 1547 } 1548 mtx_unlock(&cfiscsi_softc.lock); 1549 } else { 1550 #endif 1551 cs = cfiscsi_session_new(softc, cihp->offload); 1552 if (cs == NULL) { 1553 ci->status = CTL_ISCSI_ERROR; 1554 snprintf(ci->error_str, sizeof(ci->error_str), 1555 "%s: cfiscsi_session_new failed", __func__); 1556 cfiscsi_target_release(ct); 1557 return; 1558 } 1559 #ifdef ICL_KERNEL_PROXY 1560 } 1561 #endif 1562 1563 /* 1564 * First PDU of Full Feature phase has the same CmdSN as the last 1565 * PDU from the Login Phase received from the initiator. Thus, 1566 * the -1 below. 1567 */ 1568 cs->cs_cmdsn = cihp->cmdsn; 1569 cs->cs_statsn = cihp->statsn; 1570 cs->cs_max_recv_data_segment_length = cihp->max_recv_data_segment_length; 1571 cs->cs_max_send_data_segment_length = cihp->max_send_data_segment_length; 1572 cs->cs_max_burst_length = cihp->max_burst_length; 1573 cs->cs_first_burst_length = cihp->first_burst_length; 1574 cs->cs_immediate_data = !!cihp->immediate_data; 1575 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1576 cs->cs_conn->ic_header_crc32c = true; 1577 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1578 cs->cs_conn->ic_data_crc32c = true; 1579 1580 strlcpy(cs->cs_initiator_name, 1581 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1582 strlcpy(cs->cs_initiator_addr, 1583 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1584 strlcpy(cs->cs_initiator_alias, 1585 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1586 memcpy(cs->cs_initiator_isid, 1587 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1588 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1589 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1590 cihp->initiator_isid[0], cihp->initiator_isid[1], 1591 cihp->initiator_isid[2], cihp->initiator_isid[3], 1592 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1593 1594 mtx_lock(&softc->lock); 1595 if (ct->ct_online == 0) { 1596 mtx_unlock(&softc->lock); 1597 CFISCSI_SESSION_LOCK(cs); 1598 cs->cs_handoff_in_progress = false; 1599 cfiscsi_session_terminate(cs); 1600 CFISCSI_SESSION_UNLOCK(cs); 1601 cfiscsi_target_release(ct); 1602 ci->status = CTL_ISCSI_ERROR; 1603 snprintf(ci->error_str, sizeof(ci->error_str), 1604 "%s: port offline", __func__); 1605 return; 1606 } 1607 cs->cs_target = ct; 1608 mtx_unlock(&softc->lock); 1609 1610 restart: 1611 if (!cs->cs_terminating) { 1612 mtx_lock(&softc->lock); 1613 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1614 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1615 cs->cs_target == cs2->cs_target && 1616 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1617 if (strcmp(cs->cs_initiator_addr, 1618 cs2->cs_initiator_addr) != 0) { 1619 CFISCSI_SESSION_WARN(cs2, 1620 "session reinstatement from " 1621 "different address %s", 1622 cs->cs_initiator_addr); 1623 } else { 1624 CFISCSI_SESSION_DEBUG(cs2, 1625 "session reinstatement"); 1626 } 1627 cfiscsi_session_terminate(cs2); 1628 mtx_unlock(&softc->lock); 1629 pause("cfiscsi_reinstate", 1); 1630 goto restart; 1631 } 1632 } 1633 mtx_unlock(&softc->lock); 1634 } 1635 1636 /* 1637 * Register initiator with CTL. 1638 */ 1639 cfiscsi_session_register_initiator(cs); 1640 1641 #ifdef ICL_KERNEL_PROXY 1642 if (cihp->socket > 0) { 1643 #endif 1644 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1645 if (error != 0) { 1646 CFISCSI_SESSION_LOCK(cs); 1647 cs->cs_handoff_in_progress = false; 1648 cfiscsi_session_terminate(cs); 1649 CFISCSI_SESSION_UNLOCK(cs); 1650 ci->status = CTL_ISCSI_ERROR; 1651 snprintf(ci->error_str, sizeof(ci->error_str), 1652 "%s: icl_conn_handoff failed with error %d", 1653 __func__, error); 1654 return; 1655 } 1656 #ifdef ICL_KERNEL_PROXY 1657 } 1658 #endif 1659 1660 #ifdef ICL_KERNEL_PROXY 1661 cs->cs_login_phase = false; 1662 1663 /* 1664 * First PDU of the Full Feature phase has likely already arrived. 1665 * We have to pick it up and execute properly. 1666 */ 1667 if (cs->cs_login_pdu != NULL) { 1668 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1669 cfiscsi_pdu_handle(cs->cs_login_pdu); 1670 cs->cs_login_pdu = NULL; 1671 } 1672 #endif 1673 1674 CFISCSI_SESSION_LOCK(cs); 1675 cs->cs_handoff_in_progress = false; 1676 1677 /* 1678 * Wake up the maintenance thread if we got scheduled for termination. 1679 */ 1680 if (cs->cs_terminating) 1681 cfiscsi_session_terminate(cs); 1682 CFISCSI_SESSION_UNLOCK(cs); 1683 1684 ci->status = CTL_ISCSI_OK; 1685 } 1686 1687 static void 1688 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1689 { 1690 struct ctl_iscsi_list_params *cilp; 1691 struct cfiscsi_session *cs; 1692 struct cfiscsi_softc *softc; 1693 struct sbuf *sb; 1694 int error; 1695 1696 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1697 softc = &cfiscsi_softc; 1698 1699 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1700 if (sb == NULL) { 1701 ci->status = CTL_ISCSI_ERROR; 1702 snprintf(ci->error_str, sizeof(ci->error_str), 1703 "Unable to allocate %d bytes for iSCSI session list", 1704 cilp->alloc_len); 1705 return; 1706 } 1707 1708 sbuf_printf(sb, "<ctlislist>\n"); 1709 mtx_lock(&softc->lock); 1710 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1711 if (cs->cs_target == NULL) 1712 continue; 1713 error = sbuf_printf(sb, "<connection id=\"%d\">" 1714 "<initiator>%s</initiator>" 1715 "<initiator_addr>%s</initiator_addr>" 1716 "<initiator_alias>%s</initiator_alias>" 1717 "<target>%s</target>" 1718 "<target_alias>%s</target_alias>" 1719 "<target_portal_group_tag>%u</target_portal_group_tag>" 1720 "<header_digest>%s</header_digest>" 1721 "<data_digest>%s</data_digest>" 1722 "<max_recv_data_segment_length>%d</max_recv_data_segment_length>" 1723 "<max_send_data_segment_length>%d</max_send_data_segment_length>" 1724 "<max_burst_length>%d</max_burst_length>" 1725 "<first_burst_length>%d</first_burst_length>" 1726 "<immediate_data>%d</immediate_data>" 1727 "<iser>%d</iser>" 1728 "<offload>%s</offload>" 1729 "</connection>\n", 1730 cs->cs_id, 1731 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1732 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1733 cs->cs_target->ct_tag, 1734 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1735 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1736 cs->cs_max_recv_data_segment_length, 1737 cs->cs_max_send_data_segment_length, 1738 cs->cs_max_burst_length, 1739 cs->cs_first_burst_length, 1740 cs->cs_immediate_data, 1741 cs->cs_conn->ic_iser, 1742 cs->cs_conn->ic_offload); 1743 if (error != 0) 1744 break; 1745 } 1746 mtx_unlock(&softc->lock); 1747 error = sbuf_printf(sb, "</ctlislist>\n"); 1748 if (error != 0) { 1749 sbuf_delete(sb); 1750 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1751 snprintf(ci->error_str, sizeof(ci->error_str), 1752 "Out of space, %d bytes is too small", cilp->alloc_len); 1753 return; 1754 } 1755 sbuf_finish(sb); 1756 1757 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1758 if (error != 0) { 1759 sbuf_delete(sb); 1760 snprintf(ci->error_str, sizeof(ci->error_str), 1761 "copyout failed with error %d", error); 1762 ci->status = CTL_ISCSI_ERROR; 1763 return; 1764 } 1765 cilp->fill_len = sbuf_len(sb) + 1; 1766 ci->status = CTL_ISCSI_OK; 1767 sbuf_delete(sb); 1768 } 1769 1770 static void 1771 cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1772 { 1773 struct icl_pdu *response; 1774 struct iscsi_bhs_asynchronous_message *bhsam; 1775 struct ctl_iscsi_logout_params *cilp; 1776 struct cfiscsi_session *cs; 1777 struct cfiscsi_softc *softc; 1778 int found = 0; 1779 1780 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1781 softc = &cfiscsi_softc; 1782 1783 mtx_lock(&softc->lock); 1784 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1785 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1786 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1787 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1788 continue; 1789 1790 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1791 if (response == NULL) { 1792 ci->status = CTL_ISCSI_ERROR; 1793 snprintf(ci->error_str, sizeof(ci->error_str), 1794 "Unable to allocate memory"); 1795 mtx_unlock(&softc->lock); 1796 return; 1797 } 1798 bhsam = 1799 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1800 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1801 bhsam->bhsam_flags = 0x80; 1802 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1803 bhsam->bhsam_parameter3 = htons(10); 1804 cfiscsi_pdu_queue(response); 1805 found++; 1806 } 1807 mtx_unlock(&softc->lock); 1808 1809 if (found == 0) { 1810 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1811 snprintf(ci->error_str, sizeof(ci->error_str), 1812 "No matching connections found"); 1813 return; 1814 } 1815 1816 ci->status = CTL_ISCSI_OK; 1817 } 1818 1819 static void 1820 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1821 { 1822 struct icl_pdu *response; 1823 struct iscsi_bhs_asynchronous_message *bhsam; 1824 struct ctl_iscsi_terminate_params *citp; 1825 struct cfiscsi_session *cs; 1826 struct cfiscsi_softc *softc; 1827 int found = 0; 1828 1829 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1830 softc = &cfiscsi_softc; 1831 1832 mtx_lock(&softc->lock); 1833 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1834 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1835 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1836 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1837 continue; 1838 1839 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1840 if (response == NULL) { 1841 /* 1842 * Oh well. Just terminate the connection. 1843 */ 1844 } else { 1845 bhsam = (struct iscsi_bhs_asynchronous_message *) 1846 response->ip_bhs; 1847 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1848 bhsam->bhsam_flags = 0x80; 1849 bhsam->bhsam_0xffffffff = 0xffffffff; 1850 bhsam->bhsam_async_event = 1851 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1852 cfiscsi_pdu_queue(response); 1853 } 1854 cfiscsi_session_terminate(cs); 1855 found++; 1856 } 1857 mtx_unlock(&softc->lock); 1858 1859 if (found == 0) { 1860 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1861 snprintf(ci->error_str, sizeof(ci->error_str), 1862 "No matching connections found"); 1863 return; 1864 } 1865 1866 ci->status = CTL_ISCSI_OK; 1867 } 1868 1869 static void 1870 cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1871 { 1872 struct ctl_iscsi_limits_params *cilp; 1873 struct icl_drv_limits idl; 1874 int error; 1875 1876 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1877 1878 error = icl_limits(cilp->offload, false, &idl); 1879 if (error != 0) { 1880 ci->status = CTL_ISCSI_ERROR; 1881 snprintf(ci->error_str, sizeof(ci->error_str), 1882 "%s: icl_limits failed with error %d", 1883 __func__, error); 1884 return; 1885 } 1886 1887 cilp->max_recv_data_segment_length = 1888 idl.idl_max_recv_data_segment_length; 1889 cilp->max_send_data_segment_length = 1890 idl.idl_max_send_data_segment_length; 1891 cilp->max_burst_length = idl.idl_max_burst_length; 1892 cilp->first_burst_length = idl.idl_first_burst_length; 1893 1894 ci->status = CTL_ISCSI_OK; 1895 } 1896 1897 #ifdef ICL_KERNEL_PROXY 1898 static void 1899 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1900 { 1901 struct ctl_iscsi_listen_params *cilp; 1902 struct sockaddr *sa; 1903 int error; 1904 1905 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1906 1907 if (cfiscsi_softc.listener == NULL) { 1908 CFISCSI_DEBUG("no listener"); 1909 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1910 ci->status = CTL_ISCSI_ERROR; 1911 return; 1912 } 1913 1914 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1915 if (error != 0) { 1916 CFISCSI_DEBUG("getsockaddr, error %d", error); 1917 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1918 ci->status = CTL_ISCSI_ERROR; 1919 return; 1920 } 1921 1922 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1923 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1924 if (error != 0) { 1925 free(sa, M_SONAME); 1926 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1927 snprintf(ci->error_str, sizeof(ci->error_str), 1928 "icl_listen_add failed, error %d", error); 1929 ci->status = CTL_ISCSI_ERROR; 1930 return; 1931 } 1932 1933 ci->status = CTL_ISCSI_OK; 1934 } 1935 1936 static void 1937 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1938 { 1939 struct ctl_iscsi_accept_params *ciap; 1940 struct cfiscsi_session *cs; 1941 int error; 1942 1943 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1944 1945 mtx_lock(&cfiscsi_softc.lock); 1946 for (;;) { 1947 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1948 if (cs->cs_waiting_for_ctld) 1949 break; 1950 } 1951 if (cs != NULL) 1952 break; 1953 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1954 if (error != 0) { 1955 mtx_unlock(&cfiscsi_softc.lock); 1956 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1957 ci->status = CTL_ISCSI_ERROR; 1958 return; 1959 } 1960 } 1961 mtx_unlock(&cfiscsi_softc.lock); 1962 1963 cs->cs_waiting_for_ctld = false; 1964 cs->cs_login_phase = true; 1965 1966 ciap->connection_id = cs->cs_id; 1967 ciap->portal_id = cs->cs_portal_id; 1968 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1969 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1970 cs->cs_initiator_sa->sa_len); 1971 if (error != 0) { 1972 snprintf(ci->error_str, sizeof(ci->error_str), 1973 "copyout failed with error %d", error); 1974 ci->status = CTL_ISCSI_ERROR; 1975 return; 1976 } 1977 1978 ci->status = CTL_ISCSI_OK; 1979 } 1980 1981 static void 1982 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 1983 { 1984 struct ctl_iscsi_send_params *cisp; 1985 struct cfiscsi_session *cs; 1986 struct icl_pdu *ip; 1987 size_t datalen; 1988 void *data; 1989 int error; 1990 1991 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 1992 1993 mtx_lock(&cfiscsi_softc.lock); 1994 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1995 if (cs->cs_id == cisp->connection_id) 1996 break; 1997 } 1998 if (cs == NULL) { 1999 mtx_unlock(&cfiscsi_softc.lock); 2000 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 2001 ci->status = CTL_ISCSI_ERROR; 2002 return; 2003 } 2004 mtx_unlock(&cfiscsi_softc.lock); 2005 2006 #if 0 2007 if (cs->cs_login_phase == false) 2008 return (EBUSY); 2009 #endif 2010 2011 if (cs->cs_terminating) { 2012 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 2013 ci->status = CTL_ISCSI_ERROR; 2014 return; 2015 } 2016 2017 datalen = cisp->data_segment_len; 2018 /* 2019 * XXX 2020 */ 2021 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 2022 if (datalen > 65535) { 2023 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 2024 ci->status = CTL_ISCSI_ERROR; 2025 return; 2026 } 2027 if (datalen > 0) { 2028 data = malloc(datalen, M_CFISCSI, M_WAITOK); 2029 error = copyin(cisp->data_segment, data, datalen); 2030 if (error != 0) { 2031 free(data, M_CFISCSI); 2032 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 2033 ci->status = CTL_ISCSI_ERROR; 2034 return; 2035 } 2036 } 2037 2038 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 2039 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 2040 if (datalen > 0) { 2041 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 2042 free(data, M_CFISCSI); 2043 } 2044 CFISCSI_SESSION_LOCK(cs); 2045 icl_pdu_queue(ip); 2046 CFISCSI_SESSION_UNLOCK(cs); 2047 ci->status = CTL_ISCSI_OK; 2048 } 2049 2050 static void 2051 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 2052 { 2053 struct ctl_iscsi_receive_params *cirp; 2054 struct cfiscsi_session *cs; 2055 struct icl_pdu *ip; 2056 void *data; 2057 int error; 2058 2059 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2060 2061 mtx_lock(&cfiscsi_softc.lock); 2062 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2063 if (cs->cs_id == cirp->connection_id) 2064 break; 2065 } 2066 if (cs == NULL) { 2067 mtx_unlock(&cfiscsi_softc.lock); 2068 snprintf(ci->error_str, sizeof(ci->error_str), 2069 "connection not found"); 2070 ci->status = CTL_ISCSI_ERROR; 2071 return; 2072 } 2073 mtx_unlock(&cfiscsi_softc.lock); 2074 2075 #if 0 2076 if (is->is_login_phase == false) 2077 return (EBUSY); 2078 #endif 2079 2080 CFISCSI_SESSION_LOCK(cs); 2081 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2082 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2083 if (error != 0) { 2084 CFISCSI_SESSION_UNLOCK(cs); 2085 snprintf(ci->error_str, sizeof(ci->error_str), 2086 "interrupted by signal"); 2087 ci->status = CTL_ISCSI_ERROR; 2088 return; 2089 } 2090 } 2091 2092 if (cs->cs_terminating) { 2093 CFISCSI_SESSION_UNLOCK(cs); 2094 snprintf(ci->error_str, sizeof(ci->error_str), 2095 "connection terminating"); 2096 ci->status = CTL_ISCSI_ERROR; 2097 return; 2098 } 2099 ip = cs->cs_login_pdu; 2100 cs->cs_login_pdu = NULL; 2101 CFISCSI_SESSION_UNLOCK(cs); 2102 2103 if (ip->ip_data_len > cirp->data_segment_len) { 2104 icl_pdu_free(ip); 2105 snprintf(ci->error_str, sizeof(ci->error_str), 2106 "data segment too big"); 2107 ci->status = CTL_ISCSI_ERROR; 2108 return; 2109 } 2110 2111 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2112 if (ip->ip_data_len > 0) { 2113 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2114 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2115 copyout(data, cirp->data_segment, ip->ip_data_len); 2116 free(data, M_CFISCSI); 2117 } 2118 2119 icl_pdu_free(ip); 2120 ci->status = CTL_ISCSI_OK; 2121 } 2122 2123 #endif /* !ICL_KERNEL_PROXY */ 2124 2125 static void 2126 cfiscsi_ioctl_port_create(struct ctl_req *req) 2127 { 2128 struct cfiscsi_target *ct; 2129 struct ctl_port *port; 2130 const char *target, *alias, *val; 2131 struct scsi_vpd_id_descriptor *desc; 2132 int retval, len, idlen; 2133 uint16_t tag; 2134 2135 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2136 alias = dnvlist_get_string(req->args_nvl, "cfiscsi_target_alias", NULL); 2137 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2138 NULL); 2139 2140 if (target == NULL || val == NULL) { 2141 req->status = CTL_LUN_ERROR; 2142 snprintf(req->error_str, sizeof(req->error_str), 2143 "Missing required argument"); 2144 return; 2145 } 2146 2147 tag = strtoul(val, NULL, 0); 2148 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2149 if (ct == NULL) { 2150 req->status = CTL_LUN_ERROR; 2151 snprintf(req->error_str, sizeof(req->error_str), 2152 "failed to create target \"%s\"", target); 2153 return; 2154 } 2155 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2156 req->status = CTL_LUN_ERROR; 2157 snprintf(req->error_str, sizeof(req->error_str), 2158 "target \"%s\" for portal group tag %u already exists", 2159 target, tag); 2160 cfiscsi_target_release(ct); 2161 return; 2162 } 2163 port = &ct->ct_port; 2164 // WAT 2165 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2166 goto done; 2167 2168 port->frontend = &cfiscsi_frontend; 2169 port->port_type = CTL_PORT_ISCSI; 2170 /* XXX KDM what should the real number be here? */ 2171 port->num_requested_ctl_io = 4096; 2172 port->port_name = "iscsi"; 2173 port->physical_port = (int)tag; 2174 port->virtual_port = ct->ct_target_id; 2175 port->port_online = cfiscsi_online; 2176 port->port_offline = cfiscsi_offline; 2177 port->port_info = cfiscsi_info; 2178 port->onoff_arg = ct; 2179 port->fe_datamove = cfiscsi_datamove; 2180 port->fe_done = cfiscsi_done; 2181 port->targ_port = -1; 2182 port->options = nvlist_clone(req->args_nvl); 2183 2184 /* Generate Port ID. */ 2185 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2186 idlen = roundup2(idlen, 4); 2187 len = sizeof(struct scsi_vpd_device_id) + idlen; 2188 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2189 M_CTL, M_WAITOK | M_ZERO); 2190 port->port_devid->len = len; 2191 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2192 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2193 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2194 SVPD_ID_TYPE_SCSI_NAME; 2195 desc->length = idlen; 2196 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2197 2198 /* Generate Target ID. */ 2199 idlen = strlen(target) + 1; 2200 idlen = roundup2(idlen, 4); 2201 len = sizeof(struct scsi_vpd_device_id) + idlen; 2202 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2203 M_CTL, M_WAITOK | M_ZERO); 2204 port->target_devid->len = len; 2205 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2206 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2207 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2208 SVPD_ID_TYPE_SCSI_NAME; 2209 desc->length = idlen; 2210 strlcpy(desc->identifier, target, idlen); 2211 2212 retval = ctl_port_register(port); 2213 if (retval != 0) { 2214 free(port->port_devid, M_CFISCSI); 2215 free(port->target_devid, M_CFISCSI); 2216 cfiscsi_target_release(ct); 2217 req->status = CTL_LUN_ERROR; 2218 snprintf(req->error_str, sizeof(req->error_str), 2219 "ctl_port_register() failed with error %d", retval); 2220 return; 2221 } 2222 done: 2223 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2224 req->status = CTL_LUN_OK; 2225 req->result_nvl = nvlist_create(0); 2226 nvlist_add_number(req->result_nvl, "port_id", port->targ_port); 2227 } 2228 2229 static void 2230 cfiscsi_ioctl_port_remove(struct ctl_req *req) 2231 { 2232 struct cfiscsi_target *ct; 2233 const char *target, *val; 2234 uint16_t tag; 2235 2236 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2237 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2238 NULL); 2239 2240 if (target == NULL || val == NULL) { 2241 req->status = CTL_LUN_ERROR; 2242 snprintf(req->error_str, sizeof(req->error_str), 2243 "Missing required argument"); 2244 return; 2245 } 2246 2247 tag = strtoul(val, NULL, 0); 2248 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2249 if (ct == NULL) { 2250 req->status = CTL_LUN_ERROR; 2251 snprintf(req->error_str, sizeof(req->error_str), 2252 "can't find target \"%s\"", target); 2253 return; 2254 } 2255 2256 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2257 ctl_port_offline(&ct->ct_port); 2258 cfiscsi_target_release(ct); 2259 cfiscsi_target_release(ct); 2260 req->status = CTL_LUN_OK; 2261 } 2262 2263 static int 2264 cfiscsi_ioctl(struct cdev *dev, 2265 u_long cmd, caddr_t addr, int flag, struct thread *td) 2266 { 2267 struct ctl_iscsi *ci; 2268 struct ctl_req *req; 2269 2270 if (cmd == CTL_PORT_REQ) { 2271 req = (struct ctl_req *)addr; 2272 switch (req->reqtype) { 2273 case CTL_REQ_CREATE: 2274 cfiscsi_ioctl_port_create(req); 2275 break; 2276 case CTL_REQ_REMOVE: 2277 cfiscsi_ioctl_port_remove(req); 2278 break; 2279 default: 2280 req->status = CTL_LUN_ERROR; 2281 snprintf(req->error_str, sizeof(req->error_str), 2282 "Unsupported request type %d", req->reqtype); 2283 } 2284 return (0); 2285 } 2286 2287 if (cmd != CTL_ISCSI) 2288 return (ENOTTY); 2289 2290 ci = (struct ctl_iscsi *)addr; 2291 switch (ci->type) { 2292 case CTL_ISCSI_HANDOFF: 2293 cfiscsi_ioctl_handoff(ci); 2294 break; 2295 case CTL_ISCSI_LIST: 2296 cfiscsi_ioctl_list(ci); 2297 break; 2298 case CTL_ISCSI_LOGOUT: 2299 cfiscsi_ioctl_logout(ci); 2300 break; 2301 case CTL_ISCSI_TERMINATE: 2302 cfiscsi_ioctl_terminate(ci); 2303 break; 2304 case CTL_ISCSI_LIMITS: 2305 cfiscsi_ioctl_limits(ci); 2306 break; 2307 #ifdef ICL_KERNEL_PROXY 2308 case CTL_ISCSI_LISTEN: 2309 cfiscsi_ioctl_listen(ci); 2310 break; 2311 case CTL_ISCSI_ACCEPT: 2312 cfiscsi_ioctl_accept(ci); 2313 break; 2314 case CTL_ISCSI_SEND: 2315 cfiscsi_ioctl_send(ci); 2316 break; 2317 case CTL_ISCSI_RECEIVE: 2318 cfiscsi_ioctl_receive(ci); 2319 break; 2320 #else 2321 case CTL_ISCSI_LISTEN: 2322 case CTL_ISCSI_ACCEPT: 2323 case CTL_ISCSI_SEND: 2324 case CTL_ISCSI_RECEIVE: 2325 ci->status = CTL_ISCSI_ERROR; 2326 snprintf(ci->error_str, sizeof(ci->error_str), 2327 "%s: CTL compiled without ICL_KERNEL_PROXY", 2328 __func__); 2329 break; 2330 #endif /* !ICL_KERNEL_PROXY */ 2331 default: 2332 ci->status = CTL_ISCSI_ERROR; 2333 snprintf(ci->error_str, sizeof(ci->error_str), 2334 "%s: invalid iSCSI request type %d", __func__, ci->type); 2335 break; 2336 } 2337 2338 return (0); 2339 } 2340 2341 static void 2342 cfiscsi_target_hold(struct cfiscsi_target *ct) 2343 { 2344 2345 refcount_acquire(&ct->ct_refcount); 2346 } 2347 2348 static void 2349 cfiscsi_target_release(struct cfiscsi_target *ct) 2350 { 2351 struct cfiscsi_softc *softc; 2352 2353 softc = ct->ct_softc; 2354 mtx_lock(&softc->lock); 2355 if (refcount_release(&ct->ct_refcount)) { 2356 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2357 mtx_unlock(&softc->lock); 2358 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2359 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2360 if (ctl_port_deregister(&ct->ct_port) != 0) 2361 printf("%s: ctl_port_deregister() failed\n", 2362 __func__); 2363 } 2364 free(ct, M_CFISCSI); 2365 2366 return; 2367 } 2368 mtx_unlock(&softc->lock); 2369 } 2370 2371 static struct cfiscsi_target * 2372 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2373 { 2374 struct cfiscsi_target *ct; 2375 2376 mtx_lock(&softc->lock); 2377 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2378 if (ct->ct_tag != tag || 2379 strcmp(name, ct->ct_name) != 0 || 2380 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2381 continue; 2382 cfiscsi_target_hold(ct); 2383 mtx_unlock(&softc->lock); 2384 return (ct); 2385 } 2386 mtx_unlock(&softc->lock); 2387 2388 return (NULL); 2389 } 2390 2391 static struct cfiscsi_target * 2392 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2393 const char *alias, uint16_t tag) 2394 { 2395 struct cfiscsi_target *ct, *newct; 2396 2397 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2398 return (NULL); 2399 2400 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2401 2402 mtx_lock(&softc->lock); 2403 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2404 if (ct->ct_tag != tag || 2405 strcmp(name, ct->ct_name) != 0 || 2406 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2407 continue; 2408 cfiscsi_target_hold(ct); 2409 mtx_unlock(&softc->lock); 2410 free(newct, M_CFISCSI); 2411 return (ct); 2412 } 2413 2414 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2415 if (alias != NULL) 2416 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2417 newct->ct_tag = tag; 2418 refcount_init(&newct->ct_refcount, 1); 2419 newct->ct_softc = softc; 2420 if (TAILQ_EMPTY(&softc->targets)) 2421 softc->last_target_id = 0; 2422 newct->ct_target_id = ++softc->last_target_id; 2423 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2424 mtx_unlock(&softc->lock); 2425 2426 return (newct); 2427 } 2428 2429 static void 2430 cfiscsi_pdu_done(struct icl_pdu *ip, int error) 2431 { 2432 2433 if (error != 0) 2434 ; // XXX: Do something on error? 2435 ((ctl_ref)ip->ip_prv0)(ip->ip_prv1, -1); 2436 } 2437 2438 static void 2439 cfiscsi_datamove_in(union ctl_io *io) 2440 { 2441 struct cfiscsi_session *cs; 2442 struct icl_pdu *request, *response; 2443 const struct iscsi_bhs_scsi_command *bhssc; 2444 struct iscsi_bhs_data_in *bhsdi; 2445 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2446 size_t len, expected_len, sg_len, buffer_offset; 2447 const char *sg_addr; 2448 icl_pdu_cb cb; 2449 int ctl_sg_count, error, i; 2450 2451 request = PRIV_REQUEST(io); 2452 cs = PDU_SESSION(request); 2453 2454 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2455 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2456 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2457 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2458 2459 if (io->scsiio.kern_sg_entries > 0) { 2460 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2461 ctl_sg_count = io->scsiio.kern_sg_entries; 2462 } else { 2463 ctl_sglist = &ctl_sg_entry; 2464 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2465 ctl_sglist->len = io->scsiio.kern_data_len; 2466 ctl_sg_count = 1; 2467 } 2468 2469 /* 2470 * This is the offset within the current SCSI command; for the first 2471 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2472 * it will be the sum of lengths of previous ones. 2473 */ 2474 buffer_offset = io->scsiio.kern_rel_offset; 2475 2476 /* 2477 * This is the transfer length expected by the initiator. It can be 2478 * different from the amount of data from the SCSI point of view. 2479 */ 2480 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2481 2482 /* 2483 * If the transfer is outside of expected length -- we are done. 2484 */ 2485 if (buffer_offset >= expected_len) { 2486 #if 0 2487 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2488 "already sent the expected len", buffer_offset); 2489 #endif 2490 io->scsiio.be_move_done(io); 2491 return; 2492 } 2493 2494 if (io->scsiio.kern_data_ref != NULL) 2495 cb = cfiscsi_pdu_done; 2496 else 2497 cb = NULL; 2498 2499 i = 0; 2500 sg_addr = NULL; 2501 sg_len = 0; 2502 response = NULL; 2503 bhsdi = NULL; 2504 for (;;) { 2505 if (response == NULL) { 2506 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2507 if (response == NULL) { 2508 CFISCSI_SESSION_WARN(cs, "failed to " 2509 "allocate memory; dropping connection"); 2510 ctl_set_busy(&io->scsiio); 2511 io->scsiio.be_move_done(io); 2512 cfiscsi_session_terminate(cs); 2513 return; 2514 } 2515 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2516 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2517 bhsdi->bhsdi_initiator_task_tag = 2518 bhssc->bhssc_initiator_task_tag; 2519 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2520 bhsdi->bhsdi_datasn = htonl(PRIV_EXPDATASN(io)++); 2521 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2522 } 2523 2524 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2525 if (sg_len == 0) { 2526 sg_addr = ctl_sglist[i].addr; 2527 sg_len = ctl_sglist[i].len; 2528 KASSERT(sg_len > 0, ("sg_len <= 0")); 2529 } 2530 2531 len = sg_len; 2532 2533 /* 2534 * Truncate to maximum data segment length. 2535 */ 2536 KASSERT(response->ip_data_len < cs->cs_max_send_data_segment_length, 2537 ("ip_data_len %zd >= max_send_data_segment_length %d", 2538 response->ip_data_len, cs->cs_max_send_data_segment_length)); 2539 if (response->ip_data_len + len > 2540 cs->cs_max_send_data_segment_length) { 2541 len = cs->cs_max_send_data_segment_length - 2542 response->ip_data_len; 2543 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2544 len, sg_len)); 2545 } 2546 2547 /* 2548 * Truncate to expected data transfer length. 2549 */ 2550 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2551 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2552 buffer_offset, response->ip_data_len, expected_len)); 2553 if (buffer_offset + response->ip_data_len + len > expected_len) { 2554 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2555 "to expected data transfer length %zd", 2556 buffer_offset + response->ip_data_len + len, expected_len); 2557 len = expected_len - (buffer_offset + response->ip_data_len); 2558 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2559 len, sg_len)); 2560 } 2561 2562 error = icl_pdu_append_data(response, sg_addr, len, 2563 M_NOWAIT | (cb ? ICL_NOCOPY : 0)); 2564 if (error != 0) { 2565 CFISCSI_SESSION_WARN(cs, "failed to " 2566 "allocate memory; dropping connection"); 2567 icl_pdu_free(response); 2568 ctl_set_busy(&io->scsiio); 2569 io->scsiio.be_move_done(io); 2570 cfiscsi_session_terminate(cs); 2571 return; 2572 } 2573 sg_addr += len; 2574 sg_len -= len; 2575 io->scsiio.kern_data_resid -= len; 2576 2577 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2578 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2579 buffer_offset, response->ip_data_len, expected_len)); 2580 if (buffer_offset + response->ip_data_len == expected_len) { 2581 /* 2582 * Already have the amount of data the initiator wanted. 2583 */ 2584 break; 2585 } 2586 2587 if (sg_len == 0) { 2588 /* 2589 * End of scatter-gather segment; 2590 * proceed to the next one... 2591 */ 2592 if (i == ctl_sg_count - 1) { 2593 /* 2594 * ... unless this was the last one. 2595 */ 2596 break; 2597 } 2598 i++; 2599 } 2600 2601 if (response->ip_data_len == cs->cs_max_send_data_segment_length) { 2602 /* 2603 * Can't stuff more data into the current PDU; 2604 * queue it. Note that's not enough to check 2605 * for kern_data_resid == 0 instead; there 2606 * may be several Data-In PDUs for the final 2607 * call to cfiscsi_datamove(), and we want 2608 * to set the F flag only on the last of them. 2609 */ 2610 buffer_offset += response->ip_data_len; 2611 if (buffer_offset == io->scsiio.kern_total_len || 2612 buffer_offset == expected_len) { 2613 buffer_offset -= response->ip_data_len; 2614 break; 2615 } 2616 if (cb != NULL) { 2617 response->ip_prv0 = io->scsiio.kern_data_ref; 2618 response->ip_prv1 = io->scsiio.kern_data_arg; 2619 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2620 } 2621 cfiscsi_pdu_queue_cb(response, cb); 2622 response = NULL; 2623 bhsdi = NULL; 2624 } 2625 } 2626 if (response != NULL) { 2627 buffer_offset += response->ip_data_len; 2628 if (buffer_offset == io->scsiio.kern_total_len || 2629 buffer_offset == expected_len) { 2630 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2631 if (io->io_hdr.status == CTL_SUCCESS) { 2632 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2633 if (io->scsiio.kern_total_len < 2634 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2635 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2636 bhsdi->bhsdi_residual_count = 2637 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2638 io->scsiio.kern_total_len); 2639 } else if (io->scsiio.kern_total_len > 2640 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2641 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2642 bhsdi->bhsdi_residual_count = 2643 htonl(io->scsiio.kern_total_len - 2644 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2645 } 2646 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2647 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2648 } 2649 } 2650 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2651 if (cb != NULL) { 2652 response->ip_prv0 = io->scsiio.kern_data_ref; 2653 response->ip_prv1 = io->scsiio.kern_data_arg; 2654 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2655 } 2656 cfiscsi_pdu_queue_cb(response, cb); 2657 } 2658 2659 io->scsiio.be_move_done(io); 2660 } 2661 2662 static void 2663 cfiscsi_datamove_out(union ctl_io *io) 2664 { 2665 struct cfiscsi_session *cs; 2666 struct icl_pdu *request, *response; 2667 const struct iscsi_bhs_scsi_command *bhssc; 2668 struct iscsi_bhs_r2t *bhsr2t; 2669 struct cfiscsi_data_wait *cdw; 2670 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2671 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2672 uint32_t target_transfer_tag; 2673 bool done; 2674 2675 request = PRIV_REQUEST(io); 2676 cs = PDU_SESSION(request); 2677 2678 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2679 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2680 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2681 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2682 2683 /* 2684 * Complete write underflow. Not a single byte to read. Return. 2685 */ 2686 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2687 if (io->scsiio.kern_rel_offset >= expected_len) { 2688 io->scsiio.be_move_done(io); 2689 return; 2690 } 2691 datamove_len = MIN(io->scsiio.kern_data_len, 2692 expected_len - io->scsiio.kern_rel_offset); 2693 2694 target_transfer_tag = 2695 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2696 if (target_transfer_tag == 0xffffffff) { 2697 target_transfer_tag = 2698 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2699 } 2700 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2701 &target_transfer_tag); 2702 if (cdw == NULL) { 2703 CFISCSI_SESSION_WARN(cs, "failed to " 2704 "allocate memory; dropping connection"); 2705 ctl_set_busy(&io->scsiio); 2706 io->scsiio.be_move_done(io); 2707 cfiscsi_session_terminate(cs); 2708 return; 2709 } 2710 #if 0 2711 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2712 "task tag 0x%x, target transfer tag 0x%x", 2713 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2714 #endif 2715 2716 cdw->cdw_ctl_io = io; 2717 cdw->cdw_target_transfer_tag = target_transfer_tag; 2718 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2719 cdw->cdw_r2t_end = datamove_len; 2720 cdw->cdw_datasn = 0; 2721 2722 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2723 if (io->scsiio.kern_sg_entries > 0) { 2724 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2725 } else { 2726 ctl_sglist = &ctl_sg_entry; 2727 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2728 ctl_sglist->len = datamove_len; 2729 } 2730 cdw->cdw_sg_index = 0; 2731 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2732 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2733 r2t_off = io->scsiio.ext_data_filled; 2734 while (r2t_off > 0) { 2735 if (r2t_off >= cdw->cdw_sg_len) { 2736 r2t_off -= cdw->cdw_sg_len; 2737 cdw->cdw_sg_index++; 2738 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2739 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2740 continue; 2741 } 2742 cdw->cdw_sg_addr += r2t_off; 2743 cdw->cdw_sg_len -= r2t_off; 2744 r2t_off = 0; 2745 } 2746 2747 if (cs->cs_immediate_data && 2748 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2749 icl_pdu_data_segment_length(request)) { 2750 done = cfiscsi_handle_data_segment(request, cdw); 2751 if (done) { 2752 cfiscsi_data_wait_free(cs, cdw); 2753 io->scsiio.be_move_done(io); 2754 return; 2755 } 2756 } 2757 2758 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2759 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2760 cs->cs_max_burst_length); 2761 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2762 2763 CFISCSI_SESSION_LOCK(cs); 2764 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2765 CFISCSI_SESSION_UNLOCK(cs); 2766 2767 /* 2768 * XXX: We should limit the number of outstanding R2T PDUs 2769 * per task to MaxOutstandingR2T. 2770 */ 2771 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2772 if (response == NULL) { 2773 CFISCSI_SESSION_WARN(cs, "failed to " 2774 "allocate memory; dropping connection"); 2775 ctl_set_busy(&io->scsiio); 2776 io->scsiio.be_move_done(io); 2777 cfiscsi_session_terminate(cs); 2778 return; 2779 } 2780 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2781 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2782 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2783 bhsr2t->bhsr2t_flags = 0x80; 2784 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2785 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2786 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2787 /* 2788 * XXX: Here we assume that cfiscsi_datamove() won't ever 2789 * be running concurrently on several CPUs for a given 2790 * command. 2791 */ 2792 bhsr2t->bhsr2t_r2tsn = htonl(PRIV_R2TSN(io)++); 2793 /* 2794 * This is the offset within the current SCSI command; 2795 * i.e. for the first call of datamove(), it will be 0, 2796 * and for subsequent ones it will be the sum of lengths 2797 * of previous ones. 2798 * 2799 * The ext_data_filled is to account for unsolicited 2800 * (immediate) data that might have already arrived. 2801 */ 2802 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2803 /* 2804 * This is the total length (sum of S/G lengths) this call 2805 * to cfiscsi_datamove() is supposed to handle, limited by 2806 * MaxBurstLength. 2807 */ 2808 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2809 cfiscsi_pdu_queue(response); 2810 } 2811 2812 static void 2813 cfiscsi_datamove(union ctl_io *io) 2814 { 2815 2816 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2817 cfiscsi_datamove_in(io); 2818 else { 2819 /* We hadn't received anything during this datamove yet. */ 2820 io->scsiio.ext_data_filled = 0; 2821 cfiscsi_datamove_out(io); 2822 } 2823 } 2824 2825 static void 2826 cfiscsi_scsi_command_done(union ctl_io *io) 2827 { 2828 struct icl_pdu *request, *response; 2829 struct iscsi_bhs_scsi_command *bhssc; 2830 struct iscsi_bhs_scsi_response *bhssr; 2831 #ifdef DIAGNOSTIC 2832 struct cfiscsi_data_wait *cdw; 2833 #endif 2834 struct cfiscsi_session *cs; 2835 uint16_t sense_length; 2836 2837 request = PRIV_REQUEST(io); 2838 cs = PDU_SESSION(request); 2839 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2840 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2841 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2842 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2843 2844 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2845 // bhssc->bhssc_initiator_task_tag); 2846 2847 #ifdef DIAGNOSTIC 2848 CFISCSI_SESSION_LOCK(cs); 2849 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2850 KASSERT(bhssc->bhssc_initiator_task_tag != 2851 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2852 CFISCSI_SESSION_UNLOCK(cs); 2853 #endif 2854 2855 /* 2856 * Do not return status for aborted commands. 2857 * There are exceptions, but none supported by CTL yet. 2858 */ 2859 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2860 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2861 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2862 ctl_free_io(io); 2863 icl_pdu_free(request); 2864 return; 2865 } 2866 2867 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2868 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2869 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2870 bhssr->bhssr_flags = 0x80; 2871 /* 2872 * XXX: We don't deal with bidirectional under/overflows; 2873 * does anything actually support those? 2874 */ 2875 if (io->scsiio.kern_total_len < 2876 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2877 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2878 bhssr->bhssr_residual_count = 2879 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2880 io->scsiio.kern_total_len); 2881 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2882 // ntohl(bhssr->bhssr_residual_count)); 2883 } else if (io->scsiio.kern_total_len > 2884 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2885 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2886 bhssr->bhssr_residual_count = htonl(io->scsiio.kern_total_len - 2887 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2888 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2889 // ntohl(bhssr->bhssr_residual_count)); 2890 } 2891 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2892 bhssr->bhssr_status = io->scsiio.scsi_status; 2893 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2894 bhssr->bhssr_expdatasn = htonl(PRIV_EXPDATASN(io)); 2895 2896 if (io->scsiio.sense_len > 0) { 2897 #if 0 2898 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2899 io->scsiio.sense_len); 2900 #endif 2901 sense_length = htons(io->scsiio.sense_len); 2902 icl_pdu_append_data(response, 2903 &sense_length, sizeof(sense_length), M_WAITOK); 2904 icl_pdu_append_data(response, 2905 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2906 } 2907 2908 ctl_free_io(io); 2909 icl_pdu_free(request); 2910 cfiscsi_pdu_queue(response); 2911 } 2912 2913 static void 2914 cfiscsi_task_management_done(union ctl_io *io) 2915 { 2916 struct icl_pdu *request, *response; 2917 struct iscsi_bhs_task_management_request *bhstmr; 2918 struct iscsi_bhs_task_management_response *bhstmr2; 2919 struct cfiscsi_data_wait *cdw, *tmpcdw; 2920 struct cfiscsi_session *cs, *tcs; 2921 struct cfiscsi_softc *softc; 2922 int cold_reset = 0; 2923 2924 request = PRIV_REQUEST(io); 2925 cs = PDU_SESSION(request); 2926 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2927 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2928 ISCSI_BHS_OPCODE_TASK_REQUEST, 2929 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2930 2931 #if 0 2932 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2933 bhstmr->bhstmr_initiator_task_tag, 2934 bhstmr->bhstmr_referenced_task_tag); 2935 #endif 2936 2937 if ((bhstmr->bhstmr_function & ~0x80) == 2938 BHSTMR_FUNCTION_ABORT_TASK) { 2939 /* 2940 * Make sure we no longer wait for Data-Out for this command. 2941 */ 2942 CFISCSI_SESSION_LOCK(cs); 2943 TAILQ_FOREACH_SAFE(cdw, 2944 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2945 if (bhstmr->bhstmr_referenced_task_tag != 2946 cdw->cdw_initiator_task_tag) 2947 continue; 2948 2949 #if 0 2950 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2951 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2952 #endif 2953 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2954 cdw, cdw_next); 2955 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 2956 cdw->cdw_ctl_io->scsiio.io_hdr.port_status = 43; 2957 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io); 2958 cfiscsi_data_wait_free(cs, cdw); 2959 } 2960 CFISCSI_SESSION_UNLOCK(cs); 2961 } 2962 if ((bhstmr->bhstmr_function & ~0x80) == 2963 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2964 io->io_hdr.status == CTL_SUCCESS) 2965 cold_reset = 1; 2966 2967 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2968 bhstmr2 = (struct iscsi_bhs_task_management_response *) 2969 response->ip_bhs; 2970 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 2971 bhstmr2->bhstmr_flags = 0x80; 2972 switch (io->taskio.task_status) { 2973 case CTL_TASK_FUNCTION_COMPLETE: 2974 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 2975 break; 2976 case CTL_TASK_FUNCTION_SUCCEEDED: 2977 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 2978 break; 2979 case CTL_TASK_LUN_DOES_NOT_EXIST: 2980 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 2981 break; 2982 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 2983 default: 2984 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 2985 break; 2986 } 2987 memcpy(bhstmr2->bhstmr_additional_reponse_information, 2988 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 2989 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 2990 2991 ctl_free_io(io); 2992 icl_pdu_free(request); 2993 cfiscsi_pdu_queue(response); 2994 2995 if (cold_reset) { 2996 softc = cs->cs_target->ct_softc; 2997 mtx_lock(&softc->lock); 2998 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 2999 if (tcs->cs_target == cs->cs_target) 3000 cfiscsi_session_terminate(tcs); 3001 } 3002 mtx_unlock(&softc->lock); 3003 } 3004 } 3005 3006 static void 3007 cfiscsi_done(union ctl_io *io) 3008 { 3009 struct icl_pdu *request; 3010 struct cfiscsi_session *cs; 3011 3012 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 3013 ("invalid CTL status %#x", io->io_hdr.status)); 3014 3015 if (io->io_hdr.io_type == CTL_IO_TASK && 3016 io->taskio.task_action == CTL_TASK_I_T_NEXUS_RESET) { 3017 /* 3018 * Implicit task termination has just completed; nothing to do. 3019 */ 3020 cs = PRIV_REQUEST(io); 3021 cs->cs_tasks_aborted = true; 3022 refcount_release(&cs->cs_outstanding_ctl_pdus); 3023 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 3024 ctl_free_io(io); 3025 return; 3026 } 3027 3028 request = PRIV_REQUEST(io); 3029 cs = PDU_SESSION(request); 3030 3031 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 3032 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 3033 cfiscsi_scsi_command_done(io); 3034 break; 3035 case ISCSI_BHS_OPCODE_TASK_REQUEST: 3036 cfiscsi_task_management_done(io); 3037 break; 3038 default: 3039 panic("cfiscsi_done called with wrong opcode 0x%x", 3040 request->ip_bhs->bhs_opcode); 3041 } 3042 3043 refcount_release(&cs->cs_outstanding_ctl_pdus); 3044 } 3045