1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 31 /* 32 * CTL frontend for the iSCSI protocol. 33 */ 34 35 #include <sys/cdefs.h> 36 #include <sys/param.h> 37 #include <sys/capsicum.h> 38 #include <sys/condvar.h> 39 #include <sys/endian.h> 40 #include <sys/file.h> 41 #include <sys/kernel.h> 42 #include <sys/kthread.h> 43 #include <sys/lock.h> 44 #include <sys/malloc.h> 45 #include <sys/module.h> 46 #include <sys/mutex.h> 47 #include <sys/queue.h> 48 #include <sys/sbuf.h> 49 #include <sys/socket.h> 50 #include <sys/sysctl.h> 51 #include <sys/systm.h> 52 #include <sys/uio.h> 53 #include <sys/unistd.h> 54 #include <sys/nv.h> 55 #include <sys/dnv.h> 56 #include <vm/uma.h> 57 58 #include <cam/scsi/scsi_all.h> 59 #include <cam/scsi/scsi_da.h> 60 #include <cam/ctl/ctl_io.h> 61 #include <cam/ctl/ctl.h> 62 #include <cam/ctl/ctl_backend.h> 63 #include <cam/ctl/ctl_error.h> 64 #include <cam/ctl/ctl_frontend.h> 65 #include <cam/ctl/ctl_debug.h> 66 #include <cam/ctl/ctl_ha.h> 67 #include <cam/ctl/ctl_ioctl.h> 68 #include <cam/ctl/ctl_private.h> 69 70 #include <dev/iscsi/icl.h> 71 #include <dev/iscsi/icl_wrappers.h> 72 #include <dev/iscsi/iscsi_proto.h> 73 #include <cam/ctl/ctl_frontend_iscsi.h> 74 75 #ifdef ICL_KERNEL_PROXY 76 #include <sys/socketvar.h> 77 #endif 78 79 #ifdef ICL_KERNEL_PROXY 80 FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 81 #endif 82 83 /* Used for internal nexus reset task. */ 84 #define ISCSI_BHS_OPCODE_INTERNAL 0x3e 85 86 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 87 static uma_zone_t cfiscsi_data_wait_zone; 88 89 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 90 "CAM Target Layer iSCSI Frontend"); 91 static int debug = 1; 92 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 93 &debug, 1, "Enable debug messages"); 94 static int ping_timeout = 5; 95 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 96 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 97 static int login_timeout = 60; 98 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 99 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 100 static int maxtags = 256; 101 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxtags, CTLFLAG_RWTUN, 102 &maxtags, 0, "Max number of requests queued by initiator"); 103 104 #define CFISCSI_DEBUG(X, ...) \ 105 do { \ 106 if (debug > 1) { \ 107 printf("%s: " X "\n", \ 108 __func__, ## __VA_ARGS__); \ 109 } \ 110 } while (0) 111 112 #define CFISCSI_WARN(X, ...) \ 113 do { \ 114 if (debug > 0) { \ 115 printf("WARNING: %s: " X "\n", \ 116 __func__, ## __VA_ARGS__); \ 117 } \ 118 } while (0) 119 120 #define CFISCSI_SESSION_DEBUG(S, X, ...) \ 121 do { \ 122 if (debug > 1) { \ 123 printf("%s: %s (%s): " X "\n", \ 124 __func__, S->cs_initiator_addr, \ 125 S->cs_initiator_name, ## __VA_ARGS__); \ 126 } \ 127 } while (0) 128 129 #define CFISCSI_SESSION_WARN(S, X, ...) \ 130 do { \ 131 if (debug > 0) { \ 132 printf("WARNING: %s (%s): " X "\n", \ 133 S->cs_initiator_addr, \ 134 S->cs_initiator_name, ## __VA_ARGS__); \ 135 } \ 136 } while (0) 137 138 #define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 139 #define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 140 #define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 141 142 #define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 143 #define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 144 145 struct cfiscsi_priv { 146 void *request; 147 uint32_t expdatasn; 148 uint32_t r2tsn; 149 }; 150 #define PRIV(io) \ 151 ((struct cfiscsi_priv *)&(io)->io_hdr.ctl_private[CTL_PRIV_FRONTEND]) 152 #define PRIV_REQUEST(io) PRIV(io)->request 153 #define PRIV_EXPDATASN(io) PRIV(io)->expdatasn 154 #define PRIV_R2TSN(io) PRIV(io)->r2tsn 155 156 static int cfiscsi_init(void); 157 static int cfiscsi_shutdown(void); 158 static void cfiscsi_online(void *arg); 159 static void cfiscsi_offline(void *arg); 160 static int cfiscsi_info(void *arg, struct sbuf *sb); 161 static int cfiscsi_ioctl(struct cdev *dev, 162 u_long cmd, caddr_t addr, int flag, struct thread *td); 163 static void cfiscsi_datamove(union ctl_io *io); 164 static void cfiscsi_datamove_in(union ctl_io *io); 165 static void cfiscsi_datamove_out(union ctl_io *io); 166 static void cfiscsi_done(union ctl_io *io); 167 static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 168 static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 169 static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 170 static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 171 static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 172 static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 173 static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 174 static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 175 struct cfiscsi_session *cs, union ctl_io *io, 176 uint32_t initiator_task_tag, 177 uint32_t *target_transfer_tagp); 178 static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 179 struct cfiscsi_data_wait *cdw); 180 static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 181 *softc, const char *name, uint16_t tag); 182 static struct cfiscsi_target *cfiscsi_target_find_or_create( 183 struct cfiscsi_softc *softc, const char *name, const char *alias, 184 uint16_t tag); 185 static void cfiscsi_target_release(struct cfiscsi_target *ct); 186 static void cfiscsi_session_delete(struct cfiscsi_session *cs); 187 188 static struct cfiscsi_softc cfiscsi_softc; 189 190 static struct ctl_frontend cfiscsi_frontend = 191 { 192 .name = "iscsi", 193 .init = cfiscsi_init, 194 .ioctl = cfiscsi_ioctl, 195 .shutdown = cfiscsi_shutdown, 196 }; 197 CTL_FRONTEND_DECLARE(cfiscsi, cfiscsi_frontend); 198 MODULE_DEPEND(cfiscsi, icl, 1, 1, 1); 199 200 static struct icl_pdu * 201 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 202 { 203 204 return (icl_pdu_new(request->ip_conn, flags)); 205 } 206 207 static bool 208 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 209 { 210 const struct iscsi_bhs_scsi_command *bhssc; 211 struct cfiscsi_session *cs; 212 uint32_t cmdsn, curcmdsn; 213 214 cs = PDU_SESSION(request); 215 216 /* 217 * Every incoming PDU - not just NOP-Out - resets the ping timer. 218 * The purpose of the timeout is to reset the connection when it stalls; 219 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 220 * in some queue. 221 */ 222 cs->cs_timeout = 0; 223 224 /* 225 * Immediate commands carry cmdsn, but it is neither incremented nor 226 * verified. 227 */ 228 if (request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) 229 return (false); 230 231 /* 232 * Data-Out PDUs don't contain CmdSN. 233 */ 234 if (request->ip_bhs->bhs_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 235 return (false); 236 237 /* 238 * We're only using fields common for all the request 239 * (initiator -> target) PDUs. 240 */ 241 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 242 curcmdsn = cmdsn = ntohl(bhssc->bhssc_cmdsn); 243 244 /* 245 * Increment session cmdsn and exit if we received the expected value. 246 */ 247 do { 248 if (atomic_fcmpset_32(&cs->cs_cmdsn, &curcmdsn, cmdsn + 1)) 249 return (false); 250 } while (curcmdsn == cmdsn); 251 252 /* 253 * The target MUST silently ignore any non-immediate command outside 254 * of this range. 255 */ 256 if (ISCSI_SNLT(cmdsn, curcmdsn) || 257 ISCSI_SNGT(cmdsn, curcmdsn - 1 + maxtags)) { 258 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 259 "while expected %u", cmdsn, curcmdsn); 260 return (true); 261 } 262 263 /* 264 * We don't support multiple connections now, so any discontinuity in 265 * CmdSN means lost PDUs. Since we don't support PDU retransmission -- 266 * terminate the connection. 267 */ 268 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 269 "while expected %u; dropping connection", 270 cmdsn, curcmdsn); 271 cfiscsi_session_terminate(cs); 272 return (true); 273 } 274 275 static void 276 cfiscsi_pdu_handle(struct icl_pdu *request) 277 { 278 struct cfiscsi_session *cs; 279 bool ignore; 280 281 cs = PDU_SESSION(request); 282 283 ignore = cfiscsi_pdu_update_cmdsn(request); 284 if (ignore) { 285 icl_pdu_free(request); 286 return; 287 } 288 289 /* 290 * Handle the PDU; this includes e.g. receiving the remaining 291 * part of PDU and submitting the SCSI command to CTL 292 * or queueing a reply. The handling routine is responsible 293 * for freeing the PDU when it's no longer needed. 294 */ 295 switch (request->ip_bhs->bhs_opcode & 296 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 297 case ISCSI_BHS_OPCODE_NOP_OUT: 298 cfiscsi_pdu_handle_nop_out(request); 299 break; 300 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 301 cfiscsi_pdu_handle_scsi_command(request); 302 break; 303 case ISCSI_BHS_OPCODE_TASK_REQUEST: 304 cfiscsi_pdu_handle_task_request(request); 305 break; 306 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 307 cfiscsi_pdu_handle_data_out(request); 308 break; 309 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 310 cfiscsi_pdu_handle_logout_request(request); 311 break; 312 default: 313 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 314 "opcode 0x%x; dropping connection", 315 request->ip_bhs->bhs_opcode); 316 icl_pdu_free(request); 317 cfiscsi_session_terminate(cs); 318 } 319 320 } 321 322 static void 323 cfiscsi_receive_callback(struct icl_pdu *request) 324 { 325 #ifdef ICL_KERNEL_PROXY 326 struct cfiscsi_session *cs; 327 328 cs = PDU_SESSION(request); 329 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 330 if (cs->cs_login_pdu == NULL) 331 cs->cs_login_pdu = request; 332 else 333 icl_pdu_free(request); 334 cv_signal(&cs->cs_login_cv); 335 return; 336 } 337 #endif 338 339 cfiscsi_pdu_handle(request); 340 } 341 342 static void 343 cfiscsi_error_callback(struct icl_conn *ic) 344 { 345 struct cfiscsi_session *cs; 346 347 cs = CONN_SESSION(ic); 348 349 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 350 cfiscsi_session_terminate(cs); 351 } 352 353 static int 354 cfiscsi_pdu_prepare(struct icl_pdu *response) 355 { 356 struct cfiscsi_session *cs; 357 struct iscsi_bhs_scsi_response *bhssr; 358 bool advance_statsn = true; 359 uint32_t cmdsn; 360 361 cs = PDU_SESSION(response); 362 363 CFISCSI_SESSION_LOCK_ASSERT(cs); 364 365 /* 366 * We're only using fields common for all the response 367 * (target -> initiator) PDUs. 368 */ 369 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 370 371 /* 372 * 10.8.3: "The StatSN for this connection is not advanced 373 * after this PDU is sent." 374 */ 375 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 376 advance_statsn = false; 377 378 /* 379 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 380 * StatSN for the connection is not advanced after this PDU is sent." 381 */ 382 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 383 bhssr->bhssr_initiator_task_tag == 0xffffffff) 384 advance_statsn = false; 385 386 /* 387 * See the comment below - StatSN is not meaningful and must 388 * not be advanced. 389 */ 390 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 391 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 392 advance_statsn = false; 393 394 /* 395 * 10.7.3: "The fields StatSN, Status, and Residual Count 396 * only have meaningful content if the S bit is set to 1." 397 */ 398 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 399 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 400 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 401 cmdsn = cs->cs_cmdsn; 402 bhssr->bhssr_expcmdsn = htonl(cmdsn); 403 bhssr->bhssr_maxcmdsn = htonl(cmdsn - 1 + 404 imax(0, maxtags - cs->cs_outstanding_ctl_pdus)); 405 406 if (advance_statsn) 407 cs->cs_statsn++; 408 409 return (0); 410 } 411 412 static void 413 cfiscsi_pdu_queue(struct icl_pdu *response) 414 { 415 struct cfiscsi_session *cs; 416 417 cs = PDU_SESSION(response); 418 419 CFISCSI_SESSION_LOCK(cs); 420 cfiscsi_pdu_prepare(response); 421 icl_pdu_queue(response); 422 CFISCSI_SESSION_UNLOCK(cs); 423 } 424 425 static void 426 cfiscsi_pdu_queue_cb(struct icl_pdu *response, icl_pdu_cb cb) 427 { 428 struct cfiscsi_session *cs = PDU_SESSION(response); 429 430 CFISCSI_SESSION_LOCK(cs); 431 cfiscsi_pdu_prepare(response); 432 icl_pdu_queue_cb(response, cb); 433 CFISCSI_SESSION_UNLOCK(cs); 434 } 435 436 static void 437 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 438 { 439 struct cfiscsi_session *cs; 440 struct iscsi_bhs_nop_out *bhsno; 441 struct iscsi_bhs_nop_in *bhsni; 442 struct icl_pdu *response; 443 void *data = NULL; 444 size_t datasize; 445 int error; 446 447 cs = PDU_SESSION(request); 448 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 449 450 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 451 /* 452 * Nothing to do, iscsi_pdu_update_statsn() already 453 * zeroed the timeout. 454 */ 455 icl_pdu_free(request); 456 return; 457 } 458 459 datasize = icl_pdu_data_segment_length(request); 460 if (datasize > 0) { 461 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 462 if (data == NULL) { 463 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 464 "dropping connection"); 465 icl_pdu_free(request); 466 cfiscsi_session_terminate(cs); 467 return; 468 } 469 icl_pdu_get_data(request, 0, data, datasize); 470 } 471 472 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 473 if (response == NULL) { 474 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 475 "droppping connection"); 476 free(data, M_CFISCSI); 477 icl_pdu_free(request); 478 cfiscsi_session_terminate(cs); 479 return; 480 } 481 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 482 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 483 bhsni->bhsni_flags = 0x80; 484 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 485 bhsni->bhsni_target_transfer_tag = 0xffffffff; 486 if (datasize > 0) { 487 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 488 if (error != 0) { 489 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 490 "dropping connection"); 491 free(data, M_CFISCSI); 492 icl_pdu_free(request); 493 icl_pdu_free(response); 494 cfiscsi_session_terminate(cs); 495 return; 496 } 497 free(data, M_CFISCSI); 498 } 499 500 icl_pdu_free(request); 501 cfiscsi_pdu_queue(response); 502 } 503 504 static void 505 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 506 { 507 struct iscsi_bhs_scsi_command *bhssc; 508 struct cfiscsi_session *cs; 509 union ctl_io *io; 510 int error; 511 512 cs = PDU_SESSION(request); 513 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 514 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 515 // bhssc->bhssc_initiator_task_tag); 516 517 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 518 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 519 "ImmediateData=No; dropping connection"); 520 icl_pdu_free(request); 521 cfiscsi_session_terminate(cs); 522 return; 523 } 524 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 525 ctl_zero_io(io); 526 PRIV_REQUEST(io) = request; 527 io->io_hdr.io_type = CTL_IO_SCSI; 528 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 529 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 530 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 531 io->scsiio.priority = (bhssc->bhssc_pri & BHSSC_PRI_MASK) >> 532 BHSSC_PRI_SHIFT; 533 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 534 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 535 case BHSSC_FLAGS_ATTR_UNTAGGED: 536 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 537 break; 538 case BHSSC_FLAGS_ATTR_SIMPLE: 539 io->scsiio.tag_type = CTL_TAG_SIMPLE; 540 break; 541 case BHSSC_FLAGS_ATTR_ORDERED: 542 io->scsiio.tag_type = CTL_TAG_ORDERED; 543 break; 544 case BHSSC_FLAGS_ATTR_HOQ: 545 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 546 break; 547 case BHSSC_FLAGS_ATTR_ACA: 548 io->scsiio.tag_type = CTL_TAG_ACA; 549 break; 550 default: 551 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 552 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 553 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 554 break; 555 } 556 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 557 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 558 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 559 error = ctl_run(io); 560 if (error != CTL_RETVAL_COMPLETE) { 561 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; " 562 "dropping connection", error); 563 ctl_free_io(io); 564 refcount_release(&cs->cs_outstanding_ctl_pdus); 565 icl_pdu_free(request); 566 cfiscsi_session_terminate(cs); 567 } 568 } 569 570 static void 571 cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 572 { 573 struct iscsi_bhs_task_management_request *bhstmr; 574 struct iscsi_bhs_task_management_response *bhstmr2; 575 struct icl_pdu *response; 576 struct cfiscsi_session *cs; 577 union ctl_io *io; 578 int error; 579 580 cs = PDU_SESSION(request); 581 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 582 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 583 ctl_zero_io(io); 584 PRIV_REQUEST(io) = request; 585 io->io_hdr.io_type = CTL_IO_TASK; 586 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 587 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 588 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 589 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 590 591 switch (bhstmr->bhstmr_function & ~0x80) { 592 case BHSTMR_FUNCTION_ABORT_TASK: 593 #if 0 594 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 595 #endif 596 io->taskio.task_action = CTL_TASK_ABORT_TASK; 597 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 598 break; 599 case BHSTMR_FUNCTION_ABORT_TASK_SET: 600 #if 0 601 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 602 #endif 603 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 604 break; 605 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 606 #if 0 607 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 608 #endif 609 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 610 break; 611 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 612 #if 0 613 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 614 #endif 615 io->taskio.task_action = CTL_TASK_LUN_RESET; 616 break; 617 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 618 #if 0 619 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 620 #endif 621 io->taskio.task_action = CTL_TASK_TARGET_RESET; 622 break; 623 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 624 #if 0 625 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 626 #endif 627 io->taskio.task_action = CTL_TASK_TARGET_RESET; 628 break; 629 case BHSTMR_FUNCTION_QUERY_TASK: 630 #if 0 631 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 632 #endif 633 io->taskio.task_action = CTL_TASK_QUERY_TASK; 634 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 635 break; 636 case BHSTMR_FUNCTION_QUERY_TASK_SET: 637 #if 0 638 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 639 #endif 640 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 641 break; 642 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 643 #if 0 644 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 645 #endif 646 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 647 break; 648 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 649 #if 0 650 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 651 #endif 652 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 653 break; 654 default: 655 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 656 bhstmr->bhstmr_function & ~0x80); 657 ctl_free_io(io); 658 659 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 660 if (response == NULL) { 661 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 662 "dropping connection"); 663 icl_pdu_free(request); 664 cfiscsi_session_terminate(cs); 665 return; 666 } 667 bhstmr2 = (struct iscsi_bhs_task_management_response *) 668 response->ip_bhs; 669 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 670 bhstmr2->bhstmr_flags = 0x80; 671 bhstmr2->bhstmr_response = 672 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 673 bhstmr2->bhstmr_initiator_task_tag = 674 bhstmr->bhstmr_initiator_task_tag; 675 icl_pdu_free(request); 676 cfiscsi_pdu_queue(response); 677 return; 678 } 679 680 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 681 error = ctl_run(io); 682 if (error != CTL_RETVAL_COMPLETE) { 683 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; " 684 "dropping connection", error); 685 ctl_free_io(io); 686 refcount_release(&cs->cs_outstanding_ctl_pdus); 687 icl_pdu_free(request); 688 cfiscsi_session_terminate(cs); 689 } 690 } 691 692 static bool 693 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 694 { 695 struct iscsi_bhs_data_out *bhsdo; 696 struct cfiscsi_session *cs; 697 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 698 size_t copy_len, len, off, buffer_offset; 699 int ctl_sg_count; 700 union ctl_io *io; 701 702 cs = PDU_SESSION(request); 703 704 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 705 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 706 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 707 ISCSI_BHS_OPCODE_SCSI_COMMAND, 708 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 709 710 /* 711 * We're only using fields common for Data-Out and SCSI Command PDUs. 712 */ 713 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 714 715 io = cdw->cdw_ctl_io; 716 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 717 ("CTL_FLAG_DATA_IN")); 718 719 #if 0 720 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 721 request->ip_data_len, io->scsiio.kern_total_len); 722 #endif 723 724 if (io->scsiio.kern_sg_entries > 0) { 725 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 726 ctl_sg_count = io->scsiio.kern_sg_entries; 727 } else { 728 ctl_sglist = &ctl_sg_entry; 729 ctl_sglist->addr = io->scsiio.kern_data_ptr; 730 ctl_sglist->len = io->scsiio.kern_data_len; 731 ctl_sg_count = 1; 732 } 733 734 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 735 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 736 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 737 else 738 buffer_offset = 0; 739 len = icl_pdu_data_segment_length(request); 740 741 /* 742 * Make sure the offset, as sent by the initiator, matches the offset 743 * we're supposed to be at in the scatter-gather list. 744 */ 745 if (buffer_offset > 746 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 747 buffer_offset + len <= 748 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 749 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 750 "expected %zd; dropping connection", buffer_offset, 751 (size_t)io->scsiio.kern_rel_offset + 752 (size_t)io->scsiio.ext_data_filled); 753 ctl_set_data_phase_error(&io->scsiio); 754 cfiscsi_session_terminate(cs); 755 return (true); 756 } 757 758 /* 759 * This is the offset within the PDU data segment, as opposed 760 * to buffer_offset, which is the offset within the task (SCSI 761 * command). 762 */ 763 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 764 buffer_offset; 765 766 /* 767 * Iterate over the scatter/gather segments, filling them with data 768 * from the PDU data segment. Note that this can get called multiple 769 * times for one SCSI command; the cdw structure holds state for the 770 * scatter/gather list. 771 */ 772 for (;;) { 773 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 774 ("cdw->cdw_sg_index >= ctl_sg_count")); 775 if (cdw->cdw_sg_len == 0) { 776 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 777 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 778 } 779 KASSERT(off <= len, ("len > off")); 780 copy_len = len - off; 781 if (copy_len > cdw->cdw_sg_len) 782 copy_len = cdw->cdw_sg_len; 783 784 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 785 cdw->cdw_sg_addr += copy_len; 786 cdw->cdw_sg_len -= copy_len; 787 off += copy_len; 788 io->scsiio.ext_data_filled += copy_len; 789 io->scsiio.kern_data_resid -= copy_len; 790 791 if (cdw->cdw_sg_len == 0) { 792 /* 793 * End of current segment. 794 */ 795 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 796 /* 797 * Last segment in scatter/gather list. 798 */ 799 break; 800 } 801 cdw->cdw_sg_index++; 802 } 803 804 if (off == len) { 805 /* 806 * End of PDU payload. 807 */ 808 break; 809 } 810 } 811 812 if (len > off) { 813 /* 814 * In case of unsolicited data, it's possible that the buffer 815 * provided by CTL is smaller than negotiated FirstBurstLength. 816 * Just ignore the superfluous data; will ask for them with R2T 817 * on next call to cfiscsi_datamove(). 818 * 819 * This obviously can only happen with SCSI Command PDU. 820 */ 821 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 822 ISCSI_BHS_OPCODE_SCSI_COMMAND) 823 return (true); 824 825 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 826 "expected %zd; dropping connection", 827 icl_pdu_data_segment_length(request), off); 828 ctl_set_data_phase_error(&io->scsiio); 829 cfiscsi_session_terminate(cs); 830 return (true); 831 } 832 833 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 834 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 835 CFISCSI_SESSION_WARN(cs, "got the final packet without " 836 "the F flag; flags = 0x%x; dropping connection", 837 bhsdo->bhsdo_flags); 838 ctl_set_data_phase_error(&io->scsiio); 839 cfiscsi_session_terminate(cs); 840 return (true); 841 } 842 843 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 844 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 845 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 846 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 847 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 848 "transmitted size was %zd bytes instead of %d; " 849 "dropping connection", 850 (size_t)io->scsiio.ext_data_filled, 851 cdw->cdw_r2t_end); 852 ctl_set_data_phase_error(&io->scsiio); 853 cfiscsi_session_terminate(cs); 854 return (true); 855 } else { 856 /* 857 * For SCSI Command PDU, this just means we need to 858 * solicit more data by sending R2T. 859 */ 860 return (false); 861 } 862 } 863 864 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 865 #if 0 866 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 867 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 868 #endif 869 870 return (true); 871 } 872 873 return (false); 874 } 875 876 static void 877 cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 878 { 879 struct iscsi_bhs_data_out *bhsdo; 880 struct cfiscsi_session *cs; 881 struct cfiscsi_data_wait *cdw = NULL; 882 union ctl_io *io; 883 bool done; 884 885 cs = PDU_SESSION(request); 886 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 887 888 CFISCSI_SESSION_LOCK(cs); 889 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 890 #if 0 891 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 892 "ttt 0x%x, itt 0x%x", 893 bhsdo->bhsdo_target_transfer_tag, 894 bhsdo->bhsdo_initiator_task_tag, 895 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 896 #endif 897 if (bhsdo->bhsdo_target_transfer_tag == 898 cdw->cdw_target_transfer_tag) 899 break; 900 } 901 CFISCSI_SESSION_UNLOCK(cs); 902 if (cdw == NULL) { 903 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 904 "0x%x, not found; dropping connection", 905 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 906 icl_pdu_free(request); 907 cfiscsi_session_terminate(cs); 908 return; 909 } 910 911 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 912 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 913 "DataSN %u, while expected %u; dropping connection", 914 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 915 icl_pdu_free(request); 916 cfiscsi_session_terminate(cs); 917 return; 918 } 919 cdw->cdw_datasn += request->ip_additional_pdus + 1; 920 921 io = cdw->cdw_ctl_io; 922 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 923 ("CTL_FLAG_DATA_IN")); 924 925 done = cfiscsi_handle_data_segment(request, cdw); 926 if (done) { 927 CFISCSI_SESSION_LOCK(cs); 928 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 929 CFISCSI_SESSION_UNLOCK(cs); 930 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 931 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 932 cfiscsi_data_wait_free(cs, cdw); 933 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 934 if (done) 935 ctl_datamove_done(io, false); 936 else 937 cfiscsi_datamove_out(io); 938 } 939 940 icl_pdu_free(request); 941 } 942 943 static void 944 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 945 { 946 struct iscsi_bhs_logout_request *bhslr; 947 struct iscsi_bhs_logout_response *bhslr2; 948 struct icl_pdu *response; 949 struct cfiscsi_session *cs; 950 951 cs = PDU_SESSION(request); 952 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 953 switch (bhslr->bhslr_reason & 0x7f) { 954 case BHSLR_REASON_CLOSE_SESSION: 955 case BHSLR_REASON_CLOSE_CONNECTION: 956 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 957 if (response == NULL) { 958 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 959 icl_pdu_free(request); 960 cfiscsi_session_terminate(cs); 961 return; 962 } 963 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 964 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 965 bhslr2->bhslr_flags = 0x80; 966 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 967 bhslr2->bhslr_initiator_task_tag = 968 bhslr->bhslr_initiator_task_tag; 969 icl_pdu_free(request); 970 cfiscsi_pdu_queue(response); 971 cfiscsi_session_terminate(cs); 972 break; 973 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 974 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 975 if (response == NULL) { 976 CFISCSI_SESSION_WARN(cs, 977 "failed to allocate memory; dropping connection"); 978 icl_pdu_free(request); 979 cfiscsi_session_terminate(cs); 980 return; 981 } 982 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 983 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 984 bhslr2->bhslr_flags = 0x80; 985 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 986 bhslr2->bhslr_initiator_task_tag = 987 bhslr->bhslr_initiator_task_tag; 988 icl_pdu_free(request); 989 cfiscsi_pdu_queue(response); 990 break; 991 default: 992 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 993 bhslr->bhslr_reason); 994 icl_pdu_free(request); 995 cfiscsi_session_terminate(cs); 996 break; 997 } 998 } 999 1000 static void 1001 cfiscsi_callout(void *context) 1002 { 1003 struct icl_pdu *cp; 1004 struct iscsi_bhs_nop_in *bhsni; 1005 struct cfiscsi_session *cs; 1006 1007 cs = context; 1008 1009 if (cs->cs_terminating) 1010 return; 1011 1012 callout_schedule(&cs->cs_callout, 1 * hz); 1013 1014 atomic_add_int(&cs->cs_timeout, 1); 1015 1016 #ifdef ICL_KERNEL_PROXY 1017 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1018 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1019 CFISCSI_SESSION_WARN(cs, "login timed out after " 1020 "%d seconds; dropping connection", cs->cs_timeout); 1021 cfiscsi_session_terminate(cs); 1022 } 1023 return; 1024 } 1025 #endif 1026 1027 if (ping_timeout <= 0) { 1028 /* 1029 * Pings are disabled. Don't send NOP-In in this case; 1030 * user might have disabled pings to work around problems 1031 * with certain initiators that can't properly handle 1032 * NOP-In, such as iPXE. Reset the timeout, to avoid 1033 * triggering reconnection, should the user decide to 1034 * reenable them. 1035 */ 1036 cs->cs_timeout = 0; 1037 return; 1038 } 1039 1040 if (cs->cs_timeout >= ping_timeout) { 1041 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1042 "dropping connection", ping_timeout); 1043 cfiscsi_session_terminate(cs); 1044 return; 1045 } 1046 1047 /* 1048 * If the ping was reset less than one second ago - which means 1049 * that we've received some PDU during the last second - assume 1050 * the traffic flows correctly and don't bother sending a NOP-Out. 1051 * 1052 * (It's 2 - one for one second, and one for incrementing is_timeout 1053 * earlier in this routine.) 1054 */ 1055 if (cs->cs_timeout < 2) 1056 return; 1057 1058 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1059 if (cp == NULL) { 1060 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1061 return; 1062 } 1063 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1064 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1065 bhsni->bhsni_flags = 0x80; 1066 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1067 1068 cfiscsi_pdu_queue(cp); 1069 } 1070 1071 static struct cfiscsi_data_wait * 1072 cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1073 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1074 { 1075 struct cfiscsi_data_wait *cdw; 1076 int error; 1077 1078 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1079 if (cdw == NULL) { 1080 CFISCSI_SESSION_WARN(cs, 1081 "failed to allocate %zd bytes", sizeof(*cdw)); 1082 return (NULL); 1083 } 1084 1085 error = icl_conn_transfer_setup(cs->cs_conn, PRIV_REQUEST(io), io, 1086 target_transfer_tagp, &cdw->cdw_icl_prv); 1087 if (error != 0) { 1088 CFISCSI_SESSION_WARN(cs, 1089 "icl_conn_transfer_setup() failed with error %d", error); 1090 uma_zfree(cfiscsi_data_wait_zone, cdw); 1091 return (NULL); 1092 } 1093 1094 cdw->cdw_ctl_io = io; 1095 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1096 cdw->cdw_initiator_task_tag = initiator_task_tag; 1097 1098 return (cdw); 1099 } 1100 1101 static void 1102 cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1103 struct cfiscsi_data_wait *cdw) 1104 { 1105 1106 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1107 uma_zfree(cfiscsi_data_wait_zone, cdw); 1108 } 1109 1110 static void 1111 cfiscsi_data_wait_abort(struct cfiscsi_session *cs, 1112 struct cfiscsi_data_wait *cdw, int status) 1113 { 1114 union ctl_io *cdw_io; 1115 1116 /* 1117 * Set nonzero port status; this prevents backends from 1118 * assuming that the data transfer actually succeeded 1119 * and writing uninitialized data to disk. 1120 */ 1121 MPASS(status != 0); 1122 cdw_io = cdw->cdw_ctl_io; 1123 cdw_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1124 cdw_io->scsiio.io_hdr.port_status = status; 1125 cfiscsi_data_wait_free(cs, cdw); 1126 ctl_datamove_done(cdw_io, false); 1127 } 1128 1129 static void 1130 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1131 { 1132 struct cfiscsi_data_wait *cdw; 1133 struct icl_pdu *ip; 1134 union ctl_io *io; 1135 int error, last, wait; 1136 1137 if (cs->cs_target == NULL) 1138 return; /* No target yet, so nothing to do. */ 1139 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1140 ip->ip_bhs->bhs_opcode = ISCSI_BHS_OPCODE_INTERNAL; 1141 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1142 ctl_zero_io(io); 1143 PRIV_REQUEST(io) = ip; 1144 io->io_hdr.io_type = CTL_IO_TASK; 1145 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1146 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1147 io->io_hdr.nexus.targ_lun = 0; 1148 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1149 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1150 wait = cs->cs_outstanding_ctl_pdus; 1151 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1152 error = ctl_run(io); 1153 if (error != CTL_RETVAL_COMPLETE) { 1154 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d", error); 1155 refcount_release(&cs->cs_outstanding_ctl_pdus); 1156 ctl_free_io(io); 1157 icl_pdu_free(ip); 1158 } 1159 1160 CFISCSI_SESSION_LOCK(cs); 1161 cs->cs_terminating_tasks = true; 1162 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1163 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1164 CFISCSI_SESSION_UNLOCK(cs); 1165 cfiscsi_data_wait_abort(cs, cdw, 42); 1166 CFISCSI_SESSION_LOCK(cs); 1167 } 1168 CFISCSI_SESSION_UNLOCK(cs); 1169 1170 /* 1171 * Wait for CTL to terminate all the tasks. 1172 */ 1173 if (wait > 0) 1174 CFISCSI_SESSION_WARN(cs, 1175 "waiting for CTL to terminate %d tasks", wait); 1176 for (;;) { 1177 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1178 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1179 if (last != 0) 1180 break; 1181 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1182 0, "cfiscsi_terminate", hz / 100); 1183 } 1184 if (wait > 0) 1185 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1186 } 1187 1188 static void 1189 cfiscsi_maintenance_thread(void *arg) 1190 { 1191 struct cfiscsi_session *cs; 1192 1193 cs = arg; 1194 1195 for (;;) { 1196 CFISCSI_SESSION_LOCK(cs); 1197 if (cs->cs_terminating == false || cs->cs_handoff_in_progress) 1198 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1199 CFISCSI_SESSION_UNLOCK(cs); 1200 1201 if (cs->cs_terminating && cs->cs_handoff_in_progress == false) { 1202 /* 1203 * We used to wait up to 30 seconds to deliver queued 1204 * PDUs to the initiator. We also tried hard to deliver 1205 * SCSI Responses for the aborted PDUs. We don't do 1206 * that anymore. We might need to revisit that. 1207 */ 1208 callout_drain(&cs->cs_callout); 1209 icl_conn_close(cs->cs_conn); 1210 1211 /* 1212 * At this point ICL receive thread is no longer 1213 * running; no new tasks can be queued. 1214 */ 1215 cfiscsi_session_terminate_tasks(cs); 1216 cfiscsi_session_delete(cs); 1217 kthread_exit(); 1218 return; 1219 } 1220 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1221 } 1222 } 1223 1224 static void 1225 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1226 { 1227 1228 cs->cs_terminating = true; 1229 cv_signal(&cs->cs_maintenance_cv); 1230 #ifdef ICL_KERNEL_PROXY 1231 cv_signal(&cs->cs_login_cv); 1232 #endif 1233 } 1234 1235 static int 1236 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1237 { 1238 struct cfiscsi_target *ct; 1239 char *name; 1240 int i; 1241 1242 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1243 1244 ct = cs->cs_target; 1245 name = strdup(cs->cs_initiator_id, M_CTL); 1246 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1247 if (i < 0) { 1248 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1249 i); 1250 cs->cs_ctl_initid = -1; 1251 return (1); 1252 } 1253 cs->cs_ctl_initid = i; 1254 #if 0 1255 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1256 #endif 1257 1258 return (0); 1259 } 1260 1261 static void 1262 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1263 { 1264 int error; 1265 1266 if (cs->cs_ctl_initid == -1) 1267 return; 1268 1269 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1270 if (error != 0) { 1271 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1272 error); 1273 } 1274 cs->cs_ctl_initid = -1; 1275 } 1276 1277 static struct cfiscsi_session * 1278 cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1279 { 1280 struct cfiscsi_session *cs; 1281 int error; 1282 1283 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1284 if (cs == NULL) { 1285 CFISCSI_WARN("malloc failed"); 1286 return (NULL); 1287 } 1288 cs->cs_ctl_initid = -1; 1289 1290 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1291 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1292 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1293 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1294 #ifdef ICL_KERNEL_PROXY 1295 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1296 #endif 1297 1298 /* 1299 * The purpose of this is to avoid racing with session shutdown. 1300 * Otherwise we could have the maintenance thread call icl_conn_close() 1301 * before we call icl_conn_handoff(). 1302 */ 1303 cs->cs_handoff_in_progress = true; 1304 1305 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); 1306 if (cs->cs_conn == NULL) { 1307 free(cs, M_CFISCSI); 1308 return (NULL); 1309 } 1310 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1311 cs->cs_conn->ic_error = cfiscsi_error_callback; 1312 cs->cs_conn->ic_prv0 = cs; 1313 1314 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1315 if (error != 0) { 1316 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1317 free(cs, M_CFISCSI); 1318 return (NULL); 1319 } 1320 1321 mtx_lock(&softc->lock); 1322 cs->cs_id = ++softc->last_session_id; 1323 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1324 mtx_unlock(&softc->lock); 1325 1326 /* 1327 * Start pinging the initiator. 1328 */ 1329 callout_init(&cs->cs_callout, 1); 1330 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1331 1332 return (cs); 1333 } 1334 1335 static void 1336 cfiscsi_session_delete(struct cfiscsi_session *cs) 1337 { 1338 struct cfiscsi_softc *softc; 1339 1340 softc = &cfiscsi_softc; 1341 1342 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1343 ("destroying session with outstanding CTL pdus")); 1344 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1345 ("destroying session with non-empty queue")); 1346 1347 mtx_lock(&softc->lock); 1348 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1349 mtx_unlock(&softc->lock); 1350 1351 cfiscsi_session_unregister_initiator(cs); 1352 if (cs->cs_target != NULL) 1353 cfiscsi_target_release(cs->cs_target); 1354 icl_conn_close(cs->cs_conn); 1355 icl_conn_free(cs->cs_conn); 1356 free(cs, M_CFISCSI); 1357 cv_signal(&softc->sessions_cv); 1358 } 1359 1360 static int 1361 cfiscsi_init(void) 1362 { 1363 struct cfiscsi_softc *softc; 1364 1365 softc = &cfiscsi_softc; 1366 bzero(softc, sizeof(*softc)); 1367 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1368 1369 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1370 #ifdef ICL_KERNEL_PROXY 1371 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1372 #endif 1373 TAILQ_INIT(&softc->sessions); 1374 TAILQ_INIT(&softc->targets); 1375 1376 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1377 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1378 UMA_ALIGN_PTR, 0); 1379 1380 return (0); 1381 } 1382 1383 static int 1384 cfiscsi_shutdown(void) 1385 { 1386 struct cfiscsi_softc *softc = &cfiscsi_softc; 1387 1388 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) 1389 return (EBUSY); 1390 1391 uma_zdestroy(cfiscsi_data_wait_zone); 1392 #ifdef ICL_KERNEL_PROXY 1393 cv_destroy(&softc->accept_cv); 1394 #endif 1395 cv_destroy(&softc->sessions_cv); 1396 mtx_destroy(&softc->lock); 1397 return (0); 1398 } 1399 1400 #ifdef ICL_KERNEL_PROXY 1401 static void 1402 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1403 { 1404 struct cfiscsi_session *cs; 1405 1406 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1407 if (cs == NULL) { 1408 CFISCSI_WARN("failed to create session"); 1409 return; 1410 } 1411 1412 icl_conn_handoff_sock(cs->cs_conn, so); 1413 cs->cs_initiator_sa = sa; 1414 cs->cs_portal_id = portal_id; 1415 cs->cs_handoff_in_progress = false; 1416 cs->cs_waiting_for_ctld = true; 1417 cv_signal(&cfiscsi_softc.accept_cv); 1418 1419 CFISCSI_SESSION_LOCK(cs); 1420 /* 1421 * Wake up the maintenance thread if we got scheduled for termination 1422 * somewhere between cfiscsi_session_new() and icl_conn_handoff_sock(). 1423 */ 1424 if (cs->cs_terminating) 1425 cfiscsi_session_terminate(cs); 1426 CFISCSI_SESSION_UNLOCK(cs); 1427 } 1428 #endif 1429 1430 static void 1431 cfiscsi_online(void *arg) 1432 { 1433 struct cfiscsi_softc *softc; 1434 struct cfiscsi_target *ct; 1435 int online; 1436 1437 ct = (struct cfiscsi_target *)arg; 1438 softc = ct->ct_softc; 1439 1440 mtx_lock(&softc->lock); 1441 if (ct->ct_online) { 1442 mtx_unlock(&softc->lock); 1443 return; 1444 } 1445 ct->ct_online = 1; 1446 online = softc->online++; 1447 mtx_unlock(&softc->lock); 1448 if (online > 0) 1449 return; 1450 1451 #ifdef ICL_KERNEL_PROXY 1452 if (softc->listener != NULL) 1453 icl_listen_free(softc->listener); 1454 softc->listener = icl_listen_new(cfiscsi_accept); 1455 #endif 1456 } 1457 1458 static void 1459 cfiscsi_offline(void *arg) 1460 { 1461 struct cfiscsi_softc *softc; 1462 struct cfiscsi_target *ct; 1463 struct cfiscsi_session *cs; 1464 int error, online; 1465 1466 ct = (struct cfiscsi_target *)arg; 1467 softc = ct->ct_softc; 1468 1469 mtx_lock(&softc->lock); 1470 if (!ct->ct_online) { 1471 mtx_unlock(&softc->lock); 1472 return; 1473 } 1474 ct->ct_online = 0; 1475 online = --softc->online; 1476 1477 do { 1478 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1479 if (cs->cs_target == ct) 1480 cfiscsi_session_terminate(cs); 1481 } 1482 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1483 if (cs->cs_target == ct) 1484 break; 1485 } 1486 if (cs != NULL) { 1487 error = cv_wait_sig(&softc->sessions_cv, &softc->lock); 1488 if (error != 0) { 1489 CFISCSI_SESSION_DEBUG(cs, 1490 "cv_wait failed with error %d\n", error); 1491 break; 1492 } 1493 } 1494 } while (cs != NULL && ct->ct_online == 0); 1495 mtx_unlock(&softc->lock); 1496 if (online > 0) 1497 return; 1498 1499 #ifdef ICL_KERNEL_PROXY 1500 icl_listen_free(softc->listener); 1501 softc->listener = NULL; 1502 #endif 1503 } 1504 1505 static int 1506 cfiscsi_info(void *arg, struct sbuf *sb) 1507 { 1508 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1509 int retval; 1510 1511 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1512 ct->ct_state); 1513 return (retval); 1514 } 1515 1516 static void 1517 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1518 { 1519 struct cfiscsi_softc *softc; 1520 struct cfiscsi_session *cs, *cs2; 1521 struct cfiscsi_target *ct; 1522 struct ctl_iscsi_handoff_params *cihp; 1523 int error; 1524 1525 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1526 softc = &cfiscsi_softc; 1527 1528 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1529 cihp->initiator_name, cihp->initiator_addr, 1530 cihp->target_name); 1531 1532 ct = cfiscsi_target_find(softc, cihp->target_name, 1533 cihp->portal_group_tag); 1534 if (ct == NULL) { 1535 ci->status = CTL_ISCSI_ERROR; 1536 snprintf(ci->error_str, sizeof(ci->error_str), 1537 "%s: target not found", __func__); 1538 return; 1539 } 1540 1541 #ifdef ICL_KERNEL_PROXY 1542 if (cihp->socket > 0 && cihp->connection_id > 0) { 1543 snprintf(ci->error_str, sizeof(ci->error_str), 1544 "both socket and connection_id set"); 1545 ci->status = CTL_ISCSI_ERROR; 1546 cfiscsi_target_release(ct); 1547 return; 1548 } 1549 if (cihp->socket == 0) { 1550 mtx_lock(&cfiscsi_softc.lock); 1551 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1552 if (cs->cs_id == cihp->connection_id) 1553 break; 1554 } 1555 if (cs == NULL) { 1556 mtx_unlock(&cfiscsi_softc.lock); 1557 snprintf(ci->error_str, sizeof(ci->error_str), 1558 "connection not found"); 1559 ci->status = CTL_ISCSI_ERROR; 1560 cfiscsi_target_release(ct); 1561 return; 1562 } 1563 mtx_unlock(&cfiscsi_softc.lock); 1564 } else { 1565 #endif 1566 cs = cfiscsi_session_new(softc, cihp->offload); 1567 if (cs == NULL) { 1568 ci->status = CTL_ISCSI_ERROR; 1569 snprintf(ci->error_str, sizeof(ci->error_str), 1570 "%s: cfiscsi_session_new failed", __func__); 1571 cfiscsi_target_release(ct); 1572 return; 1573 } 1574 #ifdef ICL_KERNEL_PROXY 1575 } 1576 #endif 1577 1578 /* 1579 * First PDU of Full Feature phase has the same CmdSN as the last 1580 * PDU from the Login Phase received from the initiator. Thus, 1581 * the -1 below. 1582 */ 1583 cs->cs_cmdsn = cihp->cmdsn; 1584 cs->cs_statsn = cihp->statsn; 1585 cs->cs_conn->ic_max_recv_data_segment_length = 1586 cihp->max_recv_data_segment_length; 1587 cs->cs_conn->ic_max_send_data_segment_length = 1588 cihp->max_send_data_segment_length; 1589 cs->cs_max_burst_length = cihp->max_burst_length; 1590 cs->cs_first_burst_length = cihp->first_burst_length; 1591 cs->cs_immediate_data = !!cihp->immediate_data; 1592 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1593 cs->cs_conn->ic_header_crc32c = true; 1594 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1595 cs->cs_conn->ic_data_crc32c = true; 1596 1597 strlcpy(cs->cs_initiator_name, 1598 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1599 strlcpy(cs->cs_initiator_addr, 1600 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1601 strlcpy(cs->cs_initiator_alias, 1602 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1603 memcpy(cs->cs_initiator_isid, 1604 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1605 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1606 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1607 cihp->initiator_isid[0], cihp->initiator_isid[1], 1608 cihp->initiator_isid[2], cihp->initiator_isid[3], 1609 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1610 1611 mtx_lock(&softc->lock); 1612 if (ct->ct_online == 0) { 1613 mtx_unlock(&softc->lock); 1614 CFISCSI_SESSION_LOCK(cs); 1615 cs->cs_handoff_in_progress = false; 1616 cfiscsi_session_terminate(cs); 1617 CFISCSI_SESSION_UNLOCK(cs); 1618 cfiscsi_target_release(ct); 1619 ci->status = CTL_ISCSI_ERROR; 1620 snprintf(ci->error_str, sizeof(ci->error_str), 1621 "%s: port offline", __func__); 1622 return; 1623 } 1624 cs->cs_target = ct; 1625 mtx_unlock(&softc->lock); 1626 1627 restart: 1628 if (!cs->cs_terminating) { 1629 mtx_lock(&softc->lock); 1630 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1631 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1632 cs->cs_target == cs2->cs_target && 1633 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1634 if (strcmp(cs->cs_initiator_addr, 1635 cs2->cs_initiator_addr) != 0) { 1636 CFISCSI_SESSION_WARN(cs2, 1637 "session reinstatement from " 1638 "different address %s", 1639 cs->cs_initiator_addr); 1640 } else { 1641 CFISCSI_SESSION_DEBUG(cs2, 1642 "session reinstatement"); 1643 } 1644 cfiscsi_session_terminate(cs2); 1645 mtx_unlock(&softc->lock); 1646 pause("cfiscsi_reinstate", 1); 1647 goto restart; 1648 } 1649 } 1650 mtx_unlock(&softc->lock); 1651 } 1652 1653 /* 1654 * Register initiator with CTL. 1655 */ 1656 cfiscsi_session_register_initiator(cs); 1657 1658 #ifdef ICL_KERNEL_PROXY 1659 if (cihp->socket > 0) { 1660 #endif 1661 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1662 if (error != 0) { 1663 CFISCSI_SESSION_LOCK(cs); 1664 cs->cs_handoff_in_progress = false; 1665 cfiscsi_session_terminate(cs); 1666 CFISCSI_SESSION_UNLOCK(cs); 1667 ci->status = CTL_ISCSI_ERROR; 1668 snprintf(ci->error_str, sizeof(ci->error_str), 1669 "%s: icl_conn_handoff failed with error %d", 1670 __func__, error); 1671 return; 1672 } 1673 #ifdef ICL_KERNEL_PROXY 1674 } 1675 #endif 1676 1677 #ifdef ICL_KERNEL_PROXY 1678 cs->cs_login_phase = false; 1679 1680 /* 1681 * First PDU of the Full Feature phase has likely already arrived. 1682 * We have to pick it up and execute properly. 1683 */ 1684 if (cs->cs_login_pdu != NULL) { 1685 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1686 cfiscsi_pdu_handle(cs->cs_login_pdu); 1687 cs->cs_login_pdu = NULL; 1688 } 1689 #endif 1690 1691 CFISCSI_SESSION_LOCK(cs); 1692 cs->cs_handoff_in_progress = false; 1693 1694 /* 1695 * Wake up the maintenance thread if we got scheduled for termination. 1696 */ 1697 if (cs->cs_terminating) 1698 cfiscsi_session_terminate(cs); 1699 CFISCSI_SESSION_UNLOCK(cs); 1700 1701 ci->status = CTL_ISCSI_OK; 1702 } 1703 1704 static void 1705 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1706 { 1707 struct ctl_iscsi_list_params *cilp; 1708 struct cfiscsi_session *cs; 1709 struct cfiscsi_softc *softc; 1710 struct sbuf *sb; 1711 int error; 1712 1713 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1714 softc = &cfiscsi_softc; 1715 1716 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1717 if (sb == NULL) { 1718 ci->status = CTL_ISCSI_ERROR; 1719 snprintf(ci->error_str, sizeof(ci->error_str), 1720 "Unable to allocate %d bytes for iSCSI session list", 1721 cilp->alloc_len); 1722 return; 1723 } 1724 1725 sbuf_printf(sb, "<ctlislist>\n"); 1726 mtx_lock(&softc->lock); 1727 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1728 if (cs->cs_target == NULL) 1729 continue; 1730 error = sbuf_printf(sb, "<connection id=\"%d\">" 1731 "<initiator>%s</initiator>" 1732 "<initiator_addr>%s</initiator_addr>" 1733 "<initiator_alias>%s</initiator_alias>" 1734 "<target>%s</target>" 1735 "<target_alias>%s</target_alias>" 1736 "<target_portal_group_tag>%u</target_portal_group_tag>" 1737 "<header_digest>%s</header_digest>" 1738 "<data_digest>%s</data_digest>" 1739 "<max_recv_data_segment_length>%d</max_recv_data_segment_length>" 1740 "<max_send_data_segment_length>%d</max_send_data_segment_length>" 1741 "<max_burst_length>%d</max_burst_length>" 1742 "<first_burst_length>%d</first_burst_length>" 1743 "<immediate_data>%d</immediate_data>" 1744 "<iser>%d</iser>" 1745 "<offload>%s</offload>" 1746 "</connection>\n", 1747 cs->cs_id, 1748 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1749 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1750 cs->cs_target->ct_tag, 1751 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1752 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1753 cs->cs_conn->ic_max_recv_data_segment_length, 1754 cs->cs_conn->ic_max_send_data_segment_length, 1755 cs->cs_max_burst_length, 1756 cs->cs_first_burst_length, 1757 cs->cs_immediate_data, 1758 cs->cs_conn->ic_iser, 1759 cs->cs_conn->ic_offload); 1760 if (error != 0) 1761 break; 1762 } 1763 mtx_unlock(&softc->lock); 1764 error = sbuf_printf(sb, "</ctlislist>\n"); 1765 if (error != 0) { 1766 sbuf_delete(sb); 1767 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1768 snprintf(ci->error_str, sizeof(ci->error_str), 1769 "Out of space, %d bytes is too small", cilp->alloc_len); 1770 return; 1771 } 1772 sbuf_finish(sb); 1773 1774 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1775 if (error != 0) { 1776 sbuf_delete(sb); 1777 snprintf(ci->error_str, sizeof(ci->error_str), 1778 "copyout failed with error %d", error); 1779 ci->status = CTL_ISCSI_ERROR; 1780 return; 1781 } 1782 cilp->fill_len = sbuf_len(sb) + 1; 1783 ci->status = CTL_ISCSI_OK; 1784 sbuf_delete(sb); 1785 } 1786 1787 static void 1788 cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1789 { 1790 struct icl_pdu *response; 1791 struct iscsi_bhs_asynchronous_message *bhsam; 1792 struct ctl_iscsi_logout_params *cilp; 1793 struct cfiscsi_session *cs; 1794 struct cfiscsi_softc *softc; 1795 int found = 0; 1796 1797 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1798 softc = &cfiscsi_softc; 1799 1800 mtx_lock(&softc->lock); 1801 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1802 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1803 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1804 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1805 continue; 1806 1807 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1808 if (response == NULL) { 1809 ci->status = CTL_ISCSI_ERROR; 1810 snprintf(ci->error_str, sizeof(ci->error_str), 1811 "Unable to allocate memory"); 1812 mtx_unlock(&softc->lock); 1813 return; 1814 } 1815 bhsam = 1816 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1817 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1818 bhsam->bhsam_flags = 0x80; 1819 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1820 bhsam->bhsam_parameter3 = htons(10); 1821 cfiscsi_pdu_queue(response); 1822 found++; 1823 } 1824 mtx_unlock(&softc->lock); 1825 1826 if (found == 0) { 1827 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1828 snprintf(ci->error_str, sizeof(ci->error_str), 1829 "No matching connections found"); 1830 return; 1831 } 1832 1833 ci->status = CTL_ISCSI_OK; 1834 } 1835 1836 static void 1837 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1838 { 1839 struct icl_pdu *response; 1840 struct iscsi_bhs_asynchronous_message *bhsam; 1841 struct ctl_iscsi_terminate_params *citp; 1842 struct cfiscsi_session *cs; 1843 struct cfiscsi_softc *softc; 1844 int found = 0; 1845 1846 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1847 softc = &cfiscsi_softc; 1848 1849 mtx_lock(&softc->lock); 1850 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1851 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1852 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1853 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1854 continue; 1855 1856 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1857 if (response == NULL) { 1858 /* 1859 * Oh well. Just terminate the connection. 1860 */ 1861 } else { 1862 bhsam = (struct iscsi_bhs_asynchronous_message *) 1863 response->ip_bhs; 1864 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1865 bhsam->bhsam_flags = 0x80; 1866 bhsam->bhsam_0xffffffff = 0xffffffff; 1867 bhsam->bhsam_async_event = 1868 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1869 cfiscsi_pdu_queue(response); 1870 } 1871 cfiscsi_session_terminate(cs); 1872 found++; 1873 } 1874 mtx_unlock(&softc->lock); 1875 1876 if (found == 0) { 1877 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1878 snprintf(ci->error_str, sizeof(ci->error_str), 1879 "No matching connections found"); 1880 return; 1881 } 1882 1883 ci->status = CTL_ISCSI_OK; 1884 } 1885 1886 static void 1887 cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1888 { 1889 struct ctl_iscsi_limits_params *cilp; 1890 struct icl_drv_limits idl; 1891 int error; 1892 1893 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1894 1895 error = icl_limits(cilp->offload, false, cilp->socket, &idl); 1896 if (error != 0) { 1897 ci->status = CTL_ISCSI_ERROR; 1898 snprintf(ci->error_str, sizeof(ci->error_str), 1899 "%s: icl_limits failed with error %d", 1900 __func__, error); 1901 return; 1902 } 1903 1904 cilp->max_recv_data_segment_length = 1905 idl.idl_max_recv_data_segment_length; 1906 cilp->max_send_data_segment_length = 1907 idl.idl_max_send_data_segment_length; 1908 cilp->max_burst_length = idl.idl_max_burst_length; 1909 cilp->first_burst_length = idl.idl_first_burst_length; 1910 1911 ci->status = CTL_ISCSI_OK; 1912 } 1913 1914 #ifdef ICL_KERNEL_PROXY 1915 static void 1916 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1917 { 1918 struct ctl_iscsi_listen_params *cilp; 1919 struct sockaddr *sa; 1920 int error; 1921 1922 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1923 1924 if (cfiscsi_softc.listener == NULL) { 1925 CFISCSI_DEBUG("no listener"); 1926 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1927 ci->status = CTL_ISCSI_ERROR; 1928 return; 1929 } 1930 1931 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1932 if (error != 0) { 1933 CFISCSI_DEBUG("getsockaddr, error %d", error); 1934 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1935 ci->status = CTL_ISCSI_ERROR; 1936 return; 1937 } 1938 1939 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1940 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1941 if (error != 0) { 1942 free(sa, M_SONAME); 1943 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1944 snprintf(ci->error_str, sizeof(ci->error_str), 1945 "icl_listen_add failed, error %d", error); 1946 ci->status = CTL_ISCSI_ERROR; 1947 return; 1948 } 1949 1950 ci->status = CTL_ISCSI_OK; 1951 } 1952 1953 static void 1954 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1955 { 1956 struct ctl_iscsi_accept_params *ciap; 1957 struct cfiscsi_session *cs; 1958 int error; 1959 1960 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1961 1962 mtx_lock(&cfiscsi_softc.lock); 1963 for (;;) { 1964 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1965 if (cs->cs_waiting_for_ctld) 1966 break; 1967 } 1968 if (cs != NULL) 1969 break; 1970 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1971 if (error != 0) { 1972 mtx_unlock(&cfiscsi_softc.lock); 1973 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1974 ci->status = CTL_ISCSI_ERROR; 1975 return; 1976 } 1977 } 1978 mtx_unlock(&cfiscsi_softc.lock); 1979 1980 cs->cs_waiting_for_ctld = false; 1981 cs->cs_login_phase = true; 1982 1983 ciap->connection_id = cs->cs_id; 1984 ciap->portal_id = cs->cs_portal_id; 1985 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1986 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1987 cs->cs_initiator_sa->sa_len); 1988 if (error != 0) { 1989 snprintf(ci->error_str, sizeof(ci->error_str), 1990 "copyout failed with error %d", error); 1991 ci->status = CTL_ISCSI_ERROR; 1992 return; 1993 } 1994 1995 ci->status = CTL_ISCSI_OK; 1996 } 1997 1998 static void 1999 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 2000 { 2001 struct ctl_iscsi_send_params *cisp; 2002 struct cfiscsi_session *cs; 2003 struct icl_pdu *ip; 2004 size_t datalen; 2005 void *data; 2006 int error; 2007 2008 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 2009 2010 mtx_lock(&cfiscsi_softc.lock); 2011 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2012 if (cs->cs_id == cisp->connection_id) 2013 break; 2014 } 2015 if (cs == NULL) { 2016 mtx_unlock(&cfiscsi_softc.lock); 2017 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 2018 ci->status = CTL_ISCSI_ERROR; 2019 return; 2020 } 2021 mtx_unlock(&cfiscsi_softc.lock); 2022 2023 #if 0 2024 if (cs->cs_login_phase == false) 2025 return (EBUSY); 2026 #endif 2027 2028 if (cs->cs_terminating) { 2029 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 2030 ci->status = CTL_ISCSI_ERROR; 2031 return; 2032 } 2033 2034 datalen = cisp->data_segment_len; 2035 /* 2036 * XXX 2037 */ 2038 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 2039 if (datalen > 65535) { 2040 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 2041 ci->status = CTL_ISCSI_ERROR; 2042 return; 2043 } 2044 if (datalen > 0) { 2045 data = malloc(datalen, M_CFISCSI, M_WAITOK); 2046 error = copyin(cisp->data_segment, data, datalen); 2047 if (error != 0) { 2048 free(data, M_CFISCSI); 2049 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 2050 ci->status = CTL_ISCSI_ERROR; 2051 return; 2052 } 2053 } 2054 2055 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 2056 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 2057 if (datalen > 0) { 2058 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 2059 free(data, M_CFISCSI); 2060 } 2061 CFISCSI_SESSION_LOCK(cs); 2062 icl_pdu_queue(ip); 2063 CFISCSI_SESSION_UNLOCK(cs); 2064 ci->status = CTL_ISCSI_OK; 2065 } 2066 2067 static void 2068 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 2069 { 2070 struct ctl_iscsi_receive_params *cirp; 2071 struct cfiscsi_session *cs; 2072 struct icl_pdu *ip; 2073 void *data; 2074 int error; 2075 2076 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2077 2078 mtx_lock(&cfiscsi_softc.lock); 2079 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2080 if (cs->cs_id == cirp->connection_id) 2081 break; 2082 } 2083 if (cs == NULL) { 2084 mtx_unlock(&cfiscsi_softc.lock); 2085 snprintf(ci->error_str, sizeof(ci->error_str), 2086 "connection not found"); 2087 ci->status = CTL_ISCSI_ERROR; 2088 return; 2089 } 2090 mtx_unlock(&cfiscsi_softc.lock); 2091 2092 #if 0 2093 if (is->is_login_phase == false) 2094 return (EBUSY); 2095 #endif 2096 2097 CFISCSI_SESSION_LOCK(cs); 2098 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2099 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2100 if (error != 0) { 2101 CFISCSI_SESSION_UNLOCK(cs); 2102 snprintf(ci->error_str, sizeof(ci->error_str), 2103 "interrupted by signal"); 2104 ci->status = CTL_ISCSI_ERROR; 2105 return; 2106 } 2107 } 2108 2109 if (cs->cs_terminating) { 2110 CFISCSI_SESSION_UNLOCK(cs); 2111 snprintf(ci->error_str, sizeof(ci->error_str), 2112 "connection terminating"); 2113 ci->status = CTL_ISCSI_ERROR; 2114 return; 2115 } 2116 ip = cs->cs_login_pdu; 2117 cs->cs_login_pdu = NULL; 2118 CFISCSI_SESSION_UNLOCK(cs); 2119 2120 if (ip->ip_data_len > cirp->data_segment_len) { 2121 icl_pdu_free(ip); 2122 snprintf(ci->error_str, sizeof(ci->error_str), 2123 "data segment too big"); 2124 ci->status = CTL_ISCSI_ERROR; 2125 return; 2126 } 2127 2128 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2129 if (ip->ip_data_len > 0) { 2130 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2131 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2132 copyout(data, cirp->data_segment, ip->ip_data_len); 2133 free(data, M_CFISCSI); 2134 } 2135 2136 icl_pdu_free(ip); 2137 ci->status = CTL_ISCSI_OK; 2138 } 2139 2140 #endif /* !ICL_KERNEL_PROXY */ 2141 2142 static void 2143 cfiscsi_ioctl_port_create(struct ctl_req *req) 2144 { 2145 struct cfiscsi_target *ct; 2146 struct ctl_port *port; 2147 const char *target, *alias, *val; 2148 struct scsi_vpd_id_descriptor *desc; 2149 int retval, len, idlen; 2150 uint16_t tag; 2151 2152 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2153 alias = dnvlist_get_string(req->args_nvl, "cfiscsi_target_alias", NULL); 2154 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2155 NULL); 2156 2157 if (target == NULL || val == NULL) { 2158 req->status = CTL_LUN_ERROR; 2159 snprintf(req->error_str, sizeof(req->error_str), 2160 "Missing required argument"); 2161 return; 2162 } 2163 2164 tag = strtoul(val, NULL, 0); 2165 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2166 if (ct == NULL) { 2167 req->status = CTL_LUN_ERROR; 2168 snprintf(req->error_str, sizeof(req->error_str), 2169 "failed to create target \"%s\"", target); 2170 return; 2171 } 2172 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2173 req->status = CTL_LUN_ERROR; 2174 snprintf(req->error_str, sizeof(req->error_str), 2175 "target \"%s\" for portal group tag %u already exists", 2176 target, tag); 2177 cfiscsi_target_release(ct); 2178 return; 2179 } 2180 port = &ct->ct_port; 2181 // WAT 2182 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2183 goto done; 2184 2185 port->frontend = &cfiscsi_frontend; 2186 port->port_type = CTL_PORT_ISCSI; 2187 /* XXX KDM what should the real number be here? */ 2188 port->num_requested_ctl_io = 4096; 2189 port->port_name = "iscsi"; 2190 port->physical_port = (int)tag; 2191 port->virtual_port = ct->ct_target_id; 2192 port->port_online = cfiscsi_online; 2193 port->port_offline = cfiscsi_offline; 2194 port->port_info = cfiscsi_info; 2195 port->onoff_arg = ct; 2196 port->fe_datamove = cfiscsi_datamove; 2197 port->fe_done = cfiscsi_done; 2198 port->targ_port = -1; 2199 port->options = nvlist_clone(req->args_nvl); 2200 2201 /* Generate Port ID. */ 2202 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2203 idlen = roundup2(idlen, 4); 2204 len = sizeof(struct scsi_vpd_device_id) + idlen; 2205 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2206 M_CTL, M_WAITOK | M_ZERO); 2207 port->port_devid->len = len; 2208 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2209 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2210 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2211 SVPD_ID_TYPE_SCSI_NAME; 2212 desc->length = idlen; 2213 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2214 2215 /* Generate Target ID. */ 2216 idlen = strlen(target) + 1; 2217 idlen = roundup2(idlen, 4); 2218 len = sizeof(struct scsi_vpd_device_id) + idlen; 2219 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2220 M_CTL, M_WAITOK | M_ZERO); 2221 port->target_devid->len = len; 2222 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2223 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2224 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2225 SVPD_ID_TYPE_SCSI_NAME; 2226 desc->length = idlen; 2227 strlcpy(desc->identifier, target, idlen); 2228 2229 retval = ctl_port_register(port); 2230 if (retval != 0) { 2231 free(port->port_devid, M_CFISCSI); 2232 free(port->target_devid, M_CFISCSI); 2233 cfiscsi_target_release(ct); 2234 req->status = CTL_LUN_ERROR; 2235 snprintf(req->error_str, sizeof(req->error_str), 2236 "ctl_port_register() failed with error %d", retval); 2237 return; 2238 } 2239 done: 2240 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2241 req->status = CTL_LUN_OK; 2242 req->result_nvl = nvlist_create(0); 2243 nvlist_add_number(req->result_nvl, "port_id", port->targ_port); 2244 } 2245 2246 static void 2247 cfiscsi_ioctl_port_remove(struct ctl_req *req) 2248 { 2249 struct cfiscsi_target *ct; 2250 const char *target, *val; 2251 uint16_t tag; 2252 2253 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2254 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2255 NULL); 2256 2257 if (target == NULL || val == NULL) { 2258 req->status = CTL_LUN_ERROR; 2259 snprintf(req->error_str, sizeof(req->error_str), 2260 "Missing required argument"); 2261 return; 2262 } 2263 2264 tag = strtoul(val, NULL, 0); 2265 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2266 if (ct == NULL) { 2267 req->status = CTL_LUN_ERROR; 2268 snprintf(req->error_str, sizeof(req->error_str), 2269 "can't find target \"%s\"", target); 2270 return; 2271 } 2272 2273 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2274 ctl_port_offline(&ct->ct_port); 2275 cfiscsi_target_release(ct); 2276 cfiscsi_target_release(ct); 2277 req->status = CTL_LUN_OK; 2278 } 2279 2280 static int 2281 cfiscsi_ioctl(struct cdev *dev, 2282 u_long cmd, caddr_t addr, int flag, struct thread *td) 2283 { 2284 struct ctl_iscsi *ci; 2285 struct ctl_req *req; 2286 2287 if (cmd == CTL_PORT_REQ) { 2288 req = (struct ctl_req *)addr; 2289 switch (req->reqtype) { 2290 case CTL_REQ_CREATE: 2291 cfiscsi_ioctl_port_create(req); 2292 break; 2293 case CTL_REQ_REMOVE: 2294 cfiscsi_ioctl_port_remove(req); 2295 break; 2296 default: 2297 req->status = CTL_LUN_ERROR; 2298 snprintf(req->error_str, sizeof(req->error_str), 2299 "Unsupported request type %d", req->reqtype); 2300 } 2301 return (0); 2302 } 2303 2304 if (cmd != CTL_ISCSI) 2305 return (ENOTTY); 2306 2307 ci = (struct ctl_iscsi *)addr; 2308 switch (ci->type) { 2309 case CTL_ISCSI_HANDOFF: 2310 cfiscsi_ioctl_handoff(ci); 2311 break; 2312 case CTL_ISCSI_LIST: 2313 cfiscsi_ioctl_list(ci); 2314 break; 2315 case CTL_ISCSI_LOGOUT: 2316 cfiscsi_ioctl_logout(ci); 2317 break; 2318 case CTL_ISCSI_TERMINATE: 2319 cfiscsi_ioctl_terminate(ci); 2320 break; 2321 case CTL_ISCSI_LIMITS: 2322 cfiscsi_ioctl_limits(ci); 2323 break; 2324 #ifdef ICL_KERNEL_PROXY 2325 case CTL_ISCSI_LISTEN: 2326 cfiscsi_ioctl_listen(ci); 2327 break; 2328 case CTL_ISCSI_ACCEPT: 2329 cfiscsi_ioctl_accept(ci); 2330 break; 2331 case CTL_ISCSI_SEND: 2332 cfiscsi_ioctl_send(ci); 2333 break; 2334 case CTL_ISCSI_RECEIVE: 2335 cfiscsi_ioctl_receive(ci); 2336 break; 2337 #else 2338 case CTL_ISCSI_LISTEN: 2339 case CTL_ISCSI_ACCEPT: 2340 case CTL_ISCSI_SEND: 2341 case CTL_ISCSI_RECEIVE: 2342 ci->status = CTL_ISCSI_ERROR; 2343 snprintf(ci->error_str, sizeof(ci->error_str), 2344 "%s: CTL compiled without ICL_KERNEL_PROXY", 2345 __func__); 2346 break; 2347 #endif /* !ICL_KERNEL_PROXY */ 2348 default: 2349 ci->status = CTL_ISCSI_ERROR; 2350 snprintf(ci->error_str, sizeof(ci->error_str), 2351 "%s: invalid iSCSI request type %d", __func__, ci->type); 2352 break; 2353 } 2354 2355 return (0); 2356 } 2357 2358 static void 2359 cfiscsi_target_hold(struct cfiscsi_target *ct) 2360 { 2361 2362 refcount_acquire(&ct->ct_refcount); 2363 } 2364 2365 static void 2366 cfiscsi_target_release(struct cfiscsi_target *ct) 2367 { 2368 struct cfiscsi_softc *softc; 2369 2370 softc = ct->ct_softc; 2371 mtx_lock(&softc->lock); 2372 if (refcount_release(&ct->ct_refcount)) { 2373 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2374 mtx_unlock(&softc->lock); 2375 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2376 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2377 if (ctl_port_deregister(&ct->ct_port) != 0) 2378 printf("%s: ctl_port_deregister() failed\n", 2379 __func__); 2380 } 2381 free(ct, M_CFISCSI); 2382 2383 return; 2384 } 2385 mtx_unlock(&softc->lock); 2386 } 2387 2388 static struct cfiscsi_target * 2389 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2390 { 2391 struct cfiscsi_target *ct; 2392 2393 mtx_lock(&softc->lock); 2394 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2395 if (ct->ct_tag != tag || 2396 strcmp(name, ct->ct_name) != 0 || 2397 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2398 continue; 2399 cfiscsi_target_hold(ct); 2400 mtx_unlock(&softc->lock); 2401 return (ct); 2402 } 2403 mtx_unlock(&softc->lock); 2404 2405 return (NULL); 2406 } 2407 2408 static struct cfiscsi_target * 2409 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2410 const char *alias, uint16_t tag) 2411 { 2412 struct cfiscsi_target *ct, *newct; 2413 2414 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2415 return (NULL); 2416 2417 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2418 2419 mtx_lock(&softc->lock); 2420 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2421 if (ct->ct_tag != tag || 2422 strcmp(name, ct->ct_name) != 0 || 2423 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2424 continue; 2425 cfiscsi_target_hold(ct); 2426 mtx_unlock(&softc->lock); 2427 free(newct, M_CFISCSI); 2428 return (ct); 2429 } 2430 2431 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2432 if (alias != NULL) 2433 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2434 newct->ct_tag = tag; 2435 refcount_init(&newct->ct_refcount, 1); 2436 newct->ct_softc = softc; 2437 if (TAILQ_EMPTY(&softc->targets)) 2438 softc->last_target_id = 0; 2439 newct->ct_target_id = ++softc->last_target_id; 2440 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2441 mtx_unlock(&softc->lock); 2442 2443 return (newct); 2444 } 2445 2446 static void 2447 cfiscsi_pdu_done(struct icl_pdu *ip, int error) 2448 { 2449 2450 if (error != 0) 2451 ; // XXX: Do something on error? 2452 ((ctl_ref)ip->ip_prv0)(ip->ip_prv1, -1); 2453 } 2454 2455 static void 2456 cfiscsi_datamove_in(union ctl_io *io) 2457 { 2458 struct cfiscsi_session *cs; 2459 struct icl_pdu *request, *response; 2460 const struct iscsi_bhs_scsi_command *bhssc; 2461 struct iscsi_bhs_data_in *bhsdi; 2462 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2463 size_t len, expected_len, sg_len, buffer_offset; 2464 size_t max_send_data_segment_length; 2465 const char *sg_addr; 2466 icl_pdu_cb cb; 2467 int ctl_sg_count, error, i; 2468 2469 request = PRIV_REQUEST(io); 2470 cs = PDU_SESSION(request); 2471 2472 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2473 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2474 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2475 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2476 2477 if (io->scsiio.kern_sg_entries > 0) { 2478 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2479 ctl_sg_count = io->scsiio.kern_sg_entries; 2480 } else { 2481 ctl_sglist = &ctl_sg_entry; 2482 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2483 ctl_sglist->len = io->scsiio.kern_data_len; 2484 ctl_sg_count = 1; 2485 } 2486 2487 /* 2488 * This is the offset within the current SCSI command; for the first 2489 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2490 * it will be the sum of lengths of previous ones. 2491 */ 2492 buffer_offset = io->scsiio.kern_rel_offset; 2493 2494 /* 2495 * This is the transfer length expected by the initiator. It can be 2496 * different from the amount of data from the SCSI point of view. 2497 */ 2498 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2499 2500 /* 2501 * If the transfer is outside of expected length -- we are done. 2502 */ 2503 if (buffer_offset >= expected_len) { 2504 #if 0 2505 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2506 "already sent the expected len", buffer_offset); 2507 #endif 2508 ctl_datamove_done(io, true); 2509 return; 2510 } 2511 2512 if (io->scsiio.kern_data_ref != NULL) 2513 cb = cfiscsi_pdu_done; 2514 else 2515 cb = NULL; 2516 2517 i = 0; 2518 sg_addr = NULL; 2519 sg_len = 0; 2520 response = NULL; 2521 bhsdi = NULL; 2522 if (cs->cs_conn->ic_hw_isomax != 0) 2523 max_send_data_segment_length = cs->cs_conn->ic_hw_isomax; 2524 else 2525 max_send_data_segment_length = 2526 cs->cs_conn->ic_max_send_data_segment_length; 2527 for (;;) { 2528 if (response == NULL) { 2529 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2530 if (response == NULL) { 2531 CFISCSI_SESSION_WARN(cs, "failed to " 2532 "allocate memory; dropping connection"); 2533 ctl_set_busy(&io->scsiio); 2534 ctl_datamove_done(io, true); 2535 cfiscsi_session_terminate(cs); 2536 return; 2537 } 2538 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2539 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2540 bhsdi->bhsdi_initiator_task_tag = 2541 bhssc->bhssc_initiator_task_tag; 2542 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2543 bhsdi->bhsdi_datasn = htonl(PRIV_EXPDATASN(io)); 2544 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2545 } 2546 2547 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2548 if (sg_len == 0) { 2549 sg_addr = ctl_sglist[i].addr; 2550 sg_len = ctl_sglist[i].len; 2551 KASSERT(sg_len > 0, ("sg_len <= 0")); 2552 } 2553 2554 len = sg_len; 2555 2556 /* 2557 * Truncate to maximum data segment length. 2558 */ 2559 KASSERT(response->ip_data_len < max_send_data_segment_length, 2560 ("ip_data_len %zd >= max_send_data_segment_length %zd", 2561 response->ip_data_len, max_send_data_segment_length)); 2562 if (response->ip_data_len + len > max_send_data_segment_length) { 2563 len = max_send_data_segment_length - response->ip_data_len; 2564 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2565 len, sg_len)); 2566 } 2567 2568 /* 2569 * Truncate to expected data transfer length. 2570 */ 2571 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2572 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2573 buffer_offset, response->ip_data_len, expected_len)); 2574 if (buffer_offset + response->ip_data_len + len > expected_len) { 2575 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2576 "to expected data transfer length %zd", 2577 buffer_offset + response->ip_data_len + len, expected_len); 2578 len = expected_len - (buffer_offset + response->ip_data_len); 2579 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2580 len, sg_len)); 2581 } 2582 2583 error = icl_pdu_append_data(response, sg_addr, len, 2584 M_NOWAIT | (cb ? ICL_NOCOPY : 0)); 2585 if (error != 0) { 2586 CFISCSI_SESSION_WARN(cs, "failed to " 2587 "allocate memory; dropping connection"); 2588 icl_pdu_free(response); 2589 ctl_set_busy(&io->scsiio); 2590 ctl_datamove_done(io, true); 2591 cfiscsi_session_terminate(cs); 2592 return; 2593 } 2594 sg_addr += len; 2595 sg_len -= len; 2596 io->scsiio.kern_data_resid -= len; 2597 2598 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2599 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2600 buffer_offset, response->ip_data_len, expected_len)); 2601 if (buffer_offset + response->ip_data_len == expected_len) { 2602 /* 2603 * Already have the amount of data the initiator wanted. 2604 */ 2605 break; 2606 } 2607 2608 if (sg_len == 0) { 2609 /* 2610 * End of scatter-gather segment; 2611 * proceed to the next one... 2612 */ 2613 if (i == ctl_sg_count - 1) { 2614 /* 2615 * ... unless this was the last one. 2616 */ 2617 break; 2618 } 2619 i++; 2620 } 2621 2622 if (response->ip_data_len == max_send_data_segment_length) { 2623 /* 2624 * Can't stuff more data into the current PDU; 2625 * queue it. Note that's not enough to check 2626 * for kern_data_resid == 0 instead; there 2627 * may be several Data-In PDUs for the final 2628 * call to cfiscsi_datamove(), and we want 2629 * to set the F flag only on the last of them. 2630 */ 2631 buffer_offset += response->ip_data_len; 2632 if (buffer_offset == io->scsiio.kern_total_len || 2633 buffer_offset == expected_len) { 2634 buffer_offset -= response->ip_data_len; 2635 break; 2636 } 2637 PRIV_EXPDATASN(io) += howmany(response->ip_data_len, 2638 cs->cs_conn->ic_max_send_data_segment_length); 2639 if (cb != NULL) { 2640 response->ip_prv0 = io->scsiio.kern_data_ref; 2641 response->ip_prv1 = io->scsiio.kern_data_arg; 2642 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2643 } 2644 cfiscsi_pdu_queue_cb(response, cb); 2645 response = NULL; 2646 bhsdi = NULL; 2647 } 2648 } 2649 if (response != NULL) { 2650 buffer_offset += response->ip_data_len; 2651 if (buffer_offset == io->scsiio.kern_total_len || 2652 buffer_offset == expected_len) { 2653 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2654 if (io->io_hdr.status == CTL_SUCCESS) { 2655 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2656 if (io->scsiio.kern_total_len < 2657 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2658 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2659 bhsdi->bhsdi_residual_count = 2660 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2661 io->scsiio.kern_total_len); 2662 } else if (io->scsiio.kern_total_len > 2663 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2664 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2665 bhsdi->bhsdi_residual_count = 2666 htonl(io->scsiio.kern_total_len - 2667 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2668 } 2669 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2670 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2671 } 2672 } 2673 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2674 PRIV_EXPDATASN(io) += howmany(response->ip_data_len, 2675 cs->cs_conn->ic_max_send_data_segment_length); 2676 if (cb != NULL) { 2677 response->ip_prv0 = io->scsiio.kern_data_ref; 2678 response->ip_prv1 = io->scsiio.kern_data_arg; 2679 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2680 } 2681 cfiscsi_pdu_queue_cb(response, cb); 2682 } 2683 2684 ctl_datamove_done(io, true); 2685 } 2686 2687 static void 2688 cfiscsi_datamove_out(union ctl_io *io) 2689 { 2690 struct cfiscsi_session *cs; 2691 struct icl_pdu *request, *response; 2692 const struct iscsi_bhs_scsi_command *bhssc; 2693 struct iscsi_bhs_r2t *bhsr2t; 2694 struct cfiscsi_data_wait *cdw; 2695 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2696 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2697 uint32_t target_transfer_tag; 2698 bool done; 2699 2700 request = PRIV_REQUEST(io); 2701 cs = PDU_SESSION(request); 2702 2703 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2704 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2705 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2706 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2707 2708 /* 2709 * Complete write underflow. Not a single byte to read. Return. 2710 */ 2711 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2712 if (io->scsiio.kern_rel_offset >= expected_len) { 2713 ctl_datamove_done(io, true); 2714 return; 2715 } 2716 2717 datamove_len = MIN(io->scsiio.kern_data_len, 2718 expected_len - io->scsiio.kern_rel_offset); 2719 2720 target_transfer_tag = 2721 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2722 if (target_transfer_tag == 0xffffffff) { 2723 target_transfer_tag = 2724 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2725 } 2726 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2727 &target_transfer_tag); 2728 if (cdw == NULL) { 2729 CFISCSI_SESSION_WARN(cs, "failed to " 2730 "allocate memory; dropping connection"); 2731 ctl_set_busy(&io->scsiio); 2732 ctl_datamove_done(io, true); 2733 cfiscsi_session_terminate(cs); 2734 return; 2735 } 2736 #if 0 2737 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2738 "task tag 0x%x, target transfer tag 0x%x", 2739 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2740 #endif 2741 2742 cdw->cdw_ctl_io = io; 2743 cdw->cdw_target_transfer_tag = target_transfer_tag; 2744 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2745 cdw->cdw_r2t_end = datamove_len; 2746 cdw->cdw_datasn = 0; 2747 2748 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2749 if (io->scsiio.kern_sg_entries > 0) { 2750 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2751 } else { 2752 ctl_sglist = &ctl_sg_entry; 2753 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2754 ctl_sglist->len = datamove_len; 2755 } 2756 cdw->cdw_sg_index = 0; 2757 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2758 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2759 r2t_off = io->scsiio.ext_data_filled; 2760 while (r2t_off > 0) { 2761 if (r2t_off >= cdw->cdw_sg_len) { 2762 r2t_off -= cdw->cdw_sg_len; 2763 cdw->cdw_sg_index++; 2764 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2765 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2766 continue; 2767 } 2768 cdw->cdw_sg_addr += r2t_off; 2769 cdw->cdw_sg_len -= r2t_off; 2770 r2t_off = 0; 2771 } 2772 2773 if (cs->cs_immediate_data && 2774 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2775 icl_pdu_data_segment_length(request)) { 2776 done = cfiscsi_handle_data_segment(request, cdw); 2777 if (done) { 2778 cfiscsi_data_wait_free(cs, cdw); 2779 ctl_datamove_done(io, true); 2780 return; 2781 } 2782 } 2783 2784 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2785 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2786 cs->cs_max_burst_length); 2787 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2788 2789 CFISCSI_SESSION_LOCK(cs); 2790 if (cs->cs_terminating_tasks) { 2791 CFISCSI_SESSION_UNLOCK(cs); 2792 KASSERT((io->io_hdr.flags & CTL_FLAG_ABORT) != 0, 2793 ("%s: I/O request %p on termating session %p not aborted", 2794 __func__, io, cs)); 2795 CFISCSI_SESSION_WARN(cs, "aborting data_wait for aborted I/O"); 2796 cfiscsi_data_wait_abort(cs, cdw, 44); 2797 return; 2798 } 2799 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2800 CFISCSI_SESSION_UNLOCK(cs); 2801 2802 /* 2803 * XXX: We should limit the number of outstanding R2T PDUs 2804 * per task to MaxOutstandingR2T. 2805 */ 2806 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2807 if (response == NULL) { 2808 CFISCSI_SESSION_WARN(cs, "failed to " 2809 "allocate memory; dropping connection"); 2810 ctl_set_busy(&io->scsiio); 2811 ctl_datamove_done(io, true); 2812 cfiscsi_session_terminate(cs); 2813 return; 2814 } 2815 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2816 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2817 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2818 bhsr2t->bhsr2t_flags = 0x80; 2819 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2820 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2821 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2822 /* 2823 * XXX: Here we assume that cfiscsi_datamove() won't ever 2824 * be running concurrently on several CPUs for a given 2825 * command. 2826 */ 2827 bhsr2t->bhsr2t_r2tsn = htonl(PRIV_R2TSN(io)++); 2828 /* 2829 * This is the offset within the current SCSI command; 2830 * i.e. for the first call of datamove(), it will be 0, 2831 * and for subsequent ones it will be the sum of lengths 2832 * of previous ones. 2833 * 2834 * The ext_data_filled is to account for unsolicited 2835 * (immediate) data that might have already arrived. 2836 */ 2837 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2838 /* 2839 * This is the total length (sum of S/G lengths) this call 2840 * to cfiscsi_datamove() is supposed to handle, limited by 2841 * MaxBurstLength. 2842 */ 2843 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2844 cfiscsi_pdu_queue(response); 2845 } 2846 2847 static void 2848 cfiscsi_datamove(union ctl_io *io) 2849 { 2850 2851 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2852 cfiscsi_datamove_in(io); 2853 else { 2854 /* We hadn't received anything during this datamove yet. */ 2855 io->scsiio.ext_data_filled = 0; 2856 cfiscsi_datamove_out(io); 2857 } 2858 } 2859 2860 static void 2861 cfiscsi_scsi_command_done(union ctl_io *io) 2862 { 2863 struct icl_pdu *request, *response; 2864 struct iscsi_bhs_scsi_command *bhssc; 2865 struct iscsi_bhs_scsi_response *bhssr; 2866 #ifdef DIAGNOSTIC 2867 struct cfiscsi_data_wait *cdw; 2868 struct cfiscsi_session *cs; 2869 #endif 2870 uint16_t sense_length; 2871 2872 request = PRIV_REQUEST(io); 2873 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2874 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2875 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2876 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2877 2878 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2879 // bhssc->bhssc_initiator_task_tag); 2880 2881 #ifdef DIAGNOSTIC 2882 cs = PDU_SESSION(request); 2883 CFISCSI_SESSION_LOCK(cs); 2884 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2885 KASSERT(bhssc->bhssc_initiator_task_tag != 2886 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2887 CFISCSI_SESSION_UNLOCK(cs); 2888 #endif 2889 2890 /* 2891 * Do not return status for aborted commands. 2892 * There are exceptions, but none supported by CTL yet. 2893 */ 2894 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2895 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2896 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2897 ctl_free_io(io); 2898 icl_pdu_free(request); 2899 return; 2900 } 2901 2902 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2903 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2904 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2905 bhssr->bhssr_flags = 0x80; 2906 /* 2907 * XXX: We don't deal with bidirectional under/overflows; 2908 * does anything actually support those? 2909 */ 2910 if (io->scsiio.kern_total_len < 2911 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2912 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2913 bhssr->bhssr_residual_count = 2914 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2915 io->scsiio.kern_total_len); 2916 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2917 // ntohl(bhssr->bhssr_residual_count)); 2918 } else if (io->scsiio.kern_total_len > 2919 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2920 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2921 bhssr->bhssr_residual_count = htonl(io->scsiio.kern_total_len - 2922 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2923 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2924 // ntohl(bhssr->bhssr_residual_count)); 2925 } 2926 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2927 bhssr->bhssr_status = io->scsiio.scsi_status; 2928 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2929 bhssr->bhssr_expdatasn = htonl(PRIV_EXPDATASN(io)); 2930 2931 if (io->scsiio.sense_len > 0) { 2932 #if 0 2933 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2934 io->scsiio.sense_len); 2935 #endif 2936 sense_length = htons(io->scsiio.sense_len); 2937 icl_pdu_append_data(response, 2938 &sense_length, sizeof(sense_length), M_WAITOK); 2939 icl_pdu_append_data(response, 2940 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2941 } 2942 2943 ctl_free_io(io); 2944 icl_pdu_free(request); 2945 cfiscsi_pdu_queue(response); 2946 } 2947 2948 static void 2949 cfiscsi_task_management_done(union ctl_io *io) 2950 { 2951 struct icl_pdu *request, *response; 2952 struct iscsi_bhs_task_management_request *bhstmr; 2953 struct iscsi_bhs_task_management_response *bhstmr2; 2954 struct cfiscsi_data_wait *cdw, *tmpcdw; 2955 struct cfiscsi_session *cs, *tcs; 2956 struct cfiscsi_softc *softc; 2957 int cold_reset = 0; 2958 2959 request = PRIV_REQUEST(io); 2960 cs = PDU_SESSION(request); 2961 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2962 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2963 ISCSI_BHS_OPCODE_TASK_REQUEST, 2964 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2965 2966 #if 0 2967 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2968 bhstmr->bhstmr_initiator_task_tag, 2969 bhstmr->bhstmr_referenced_task_tag); 2970 #endif 2971 2972 if ((bhstmr->bhstmr_function & ~0x80) == 2973 BHSTMR_FUNCTION_ABORT_TASK) { 2974 /* 2975 * Make sure we no longer wait for Data-Out for this command. 2976 */ 2977 CFISCSI_SESSION_LOCK(cs); 2978 TAILQ_FOREACH_SAFE(cdw, 2979 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2980 if (bhstmr->bhstmr_referenced_task_tag != 2981 cdw->cdw_initiator_task_tag) 2982 continue; 2983 2984 #if 0 2985 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2986 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2987 #endif 2988 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2989 cdw, cdw_next); 2990 cfiscsi_data_wait_abort(cs, cdw, 43); 2991 } 2992 CFISCSI_SESSION_UNLOCK(cs); 2993 } 2994 if ((bhstmr->bhstmr_function & ~0x80) == 2995 BHSTMR_FUNCTION_TARGET_COLD_RESET && 2996 io->io_hdr.status == CTL_SUCCESS) 2997 cold_reset = 1; 2998 2999 response = cfiscsi_pdu_new_response(request, M_WAITOK); 3000 bhstmr2 = (struct iscsi_bhs_task_management_response *) 3001 response->ip_bhs; 3002 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 3003 bhstmr2->bhstmr_flags = 0x80; 3004 switch (io->taskio.task_status) { 3005 case CTL_TASK_FUNCTION_COMPLETE: 3006 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 3007 break; 3008 case CTL_TASK_FUNCTION_SUCCEEDED: 3009 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 3010 break; 3011 case CTL_TASK_LUN_DOES_NOT_EXIST: 3012 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 3013 break; 3014 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 3015 default: 3016 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 3017 break; 3018 } 3019 memcpy(bhstmr2->bhstmr_additional_reponse_information, 3020 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 3021 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 3022 3023 ctl_free_io(io); 3024 icl_pdu_free(request); 3025 cfiscsi_pdu_queue(response); 3026 3027 if (cold_reset) { 3028 softc = cs->cs_target->ct_softc; 3029 mtx_lock(&softc->lock); 3030 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 3031 if (tcs->cs_target == cs->cs_target) 3032 cfiscsi_session_terminate(tcs); 3033 } 3034 mtx_unlock(&softc->lock); 3035 } 3036 } 3037 3038 static void 3039 cfiscsi_done(union ctl_io *io) 3040 { 3041 struct icl_pdu *request; 3042 struct cfiscsi_session *cs; 3043 3044 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 3045 ("invalid CTL status %#x", io->io_hdr.status)); 3046 3047 request = PRIV_REQUEST(io); 3048 cs = PDU_SESSION(request); 3049 3050 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 3051 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 3052 cfiscsi_scsi_command_done(io); 3053 break; 3054 case ISCSI_BHS_OPCODE_TASK_REQUEST: 3055 cfiscsi_task_management_done(io); 3056 break; 3057 case ISCSI_BHS_OPCODE_INTERNAL: 3058 /* 3059 * Implicit task termination has just completed; nothing to do. 3060 */ 3061 icl_pdu_free(request); 3062 cs->cs_tasks_aborted = true; 3063 refcount_release(&cs->cs_outstanding_ctl_pdus); 3064 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 3065 ctl_free_io(io); 3066 return; 3067 default: 3068 panic("cfiscsi_done called with wrong opcode 0x%x", 3069 request->ip_bhs->bhs_opcode); 3070 } 3071 3072 refcount_release(&cs->cs_outstanding_ctl_pdus); 3073 } 3074