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sys/cam/ctl/ctl_frontend_iscsi.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 The FreeBSD Foundation 5 * 6 * This software was developed by Edward Tomasz Napierala under sponsorship 7 * from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 /* 34 * CTL frontend for the iSCSI protocol. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/capsicum.h> 42 #include <sys/condvar.h> 43 #include <sys/endian.h> 44 #include <sys/file.h> 45 #include <sys/kernel.h> 46 #include <sys/kthread.h> 47 #include <sys/lock.h> 48 #include <sys/malloc.h> 49 #include <sys/module.h> 50 #include <sys/mutex.h> 51 #include <sys/queue.h> 52 #include <sys/sbuf.h> 53 #include <sys/socket.h> 54 #include <sys/sysctl.h> 55 #include <sys/systm.h> 56 #include <sys/uio.h> 57 #include <sys/unistd.h> 58 #include <sys/nv.h> 59 #include <sys/dnv.h> 60 #include <vm/uma.h> 61 62 #include <cam/scsi/scsi_all.h> 63 #include <cam/scsi/scsi_da.h> 64 #include <cam/ctl/ctl_io.h> 65 #include <cam/ctl/ctl.h> 66 #include <cam/ctl/ctl_backend.h> 67 #include <cam/ctl/ctl_error.h> 68 #include <cam/ctl/ctl_frontend.h> 69 #include <cam/ctl/ctl_debug.h> 70 #include <cam/ctl/ctl_ha.h> 71 #include <cam/ctl/ctl_ioctl.h> 72 #include <cam/ctl/ctl_private.h> 73 74 #include <dev/iscsi/icl.h> 75 #include <dev/iscsi/icl_wrappers.h> 76 #include <dev/iscsi/iscsi_proto.h> 77 #include <cam/ctl/ctl_frontend_iscsi.h> 78 79 #ifdef ICL_KERNEL_PROXY 80 #include <sys/socketvar.h> 81 #endif 82 83 #ifdef ICL_KERNEL_PROXY 84 FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY"); 85 #endif 86 87 /* Used for internal nexus reset task. */ 88 #define ISCSI_BHS_OPCODE_INTERNAL 0x3e 89 90 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend"); 91 static uma_zone_t cfiscsi_data_wait_zone; 92 93 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 94 "CAM Target Layer iSCSI Frontend"); 95 static int debug = 1; 96 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN, 97 &debug, 1, "Enable debug messages"); 98 static int ping_timeout = 5; 99 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN, 100 &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds"); 101 static int login_timeout = 60; 102 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN, 103 &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds"); 104 static int maxtags = 256; 105 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxtags, CTLFLAG_RWTUN, 106 &maxtags, 0, "Max number of requests queued by initiator"); 107 108 #define CFISCSI_DEBUG(X, ...) \ 109 do { \ 110 if (debug > 1) { \ 111 printf("%s: " X "\n", \ 112 __func__, ## __VA_ARGS__); \ 113 } \ 114 } while (0) 115 116 #define CFISCSI_WARN(X, ...) \ 117 do { \ 118 if (debug > 0) { \ 119 printf("WARNING: %s: " X "\n", \ 120 __func__, ## __VA_ARGS__); \ 121 } \ 122 } while (0) 123 124 #define CFISCSI_SESSION_DEBUG(S, X, ...) \ 125 do { \ 126 if (debug > 1) { \ 127 printf("%s: %s (%s): " X "\n", \ 128 __func__, S->cs_initiator_addr, \ 129 S->cs_initiator_name, ## __VA_ARGS__); \ 130 } \ 131 } while (0) 132 133 #define CFISCSI_SESSION_WARN(S, X, ...) \ 134 do { \ 135 if (debug > 0) { \ 136 printf("WARNING: %s (%s): " X "\n", \ 137 S->cs_initiator_addr, \ 138 S->cs_initiator_name, ## __VA_ARGS__); \ 139 } \ 140 } while (0) 141 142 #define CFISCSI_SESSION_LOCK(X) mtx_lock(&X->cs_lock) 143 #define CFISCSI_SESSION_UNLOCK(X) mtx_unlock(&X->cs_lock) 144 #define CFISCSI_SESSION_LOCK_ASSERT(X) mtx_assert(&X->cs_lock, MA_OWNED) 145 146 #define CONN_SESSION(X) ((struct cfiscsi_session *)(X)->ic_prv0) 147 #define PDU_SESSION(X) CONN_SESSION((X)->ip_conn) 148 149 struct cfiscsi_priv { 150 void *request; 151 uint32_t expdatasn; 152 uint32_t r2tsn; 153 }; 154 #define PRIV(io) \ 155 ((struct cfiscsi_priv *)&(io)->io_hdr.ctl_private[CTL_PRIV_FRONTEND]) 156 #define PRIV_REQUEST(io) PRIV(io)->request 157 #define PRIV_EXPDATASN(io) PRIV(io)->expdatasn 158 #define PRIV_R2TSN(io) PRIV(io)->r2tsn 159 160 static int cfiscsi_init(void); 161 static int cfiscsi_shutdown(void); 162 static void cfiscsi_online(void *arg); 163 static void cfiscsi_offline(void *arg); 164 static int cfiscsi_info(void *arg, struct sbuf *sb); 165 static int cfiscsi_ioctl(struct cdev *dev, 166 u_long cmd, caddr_t addr, int flag, struct thread *td); 167 static void cfiscsi_datamove(union ctl_io *io); 168 static void cfiscsi_datamove_in(union ctl_io *io); 169 static void cfiscsi_datamove_out(union ctl_io *io); 170 static void cfiscsi_done(union ctl_io *io); 171 static bool cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request); 172 static void cfiscsi_pdu_handle_nop_out(struct icl_pdu *request); 173 static void cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request); 174 static void cfiscsi_pdu_handle_task_request(struct icl_pdu *request); 175 static void cfiscsi_pdu_handle_data_out(struct icl_pdu *request); 176 static void cfiscsi_pdu_handle_logout_request(struct icl_pdu *request); 177 static void cfiscsi_session_terminate(struct cfiscsi_session *cs); 178 static struct cfiscsi_data_wait *cfiscsi_data_wait_new( 179 struct cfiscsi_session *cs, union ctl_io *io, 180 uint32_t initiator_task_tag, 181 uint32_t *target_transfer_tagp); 182 static void cfiscsi_data_wait_free(struct cfiscsi_session *cs, 183 struct cfiscsi_data_wait *cdw); 184 static struct cfiscsi_target *cfiscsi_target_find(struct cfiscsi_softc 185 *softc, const char *name, uint16_t tag); 186 static struct cfiscsi_target *cfiscsi_target_find_or_create( 187 struct cfiscsi_softc *softc, const char *name, const char *alias, 188 uint16_t tag); 189 static void cfiscsi_target_release(struct cfiscsi_target *ct); 190 static void cfiscsi_session_delete(struct cfiscsi_session *cs); 191 192 static struct cfiscsi_softc cfiscsi_softc; 193 194 static struct ctl_frontend cfiscsi_frontend = 195 { 196 .name = "iscsi", 197 .init = cfiscsi_init, 198 .ioctl = cfiscsi_ioctl, 199 .shutdown = cfiscsi_shutdown, 200 }; 201 CTL_FRONTEND_DECLARE(cfiscsi, cfiscsi_frontend); 202 MODULE_DEPEND(cfiscsi, icl, 1, 1, 1); 203 204 static struct icl_pdu * 205 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags) 206 { 207 208 return (icl_pdu_new(request->ip_conn, flags)); 209 } 210 211 static bool 212 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request) 213 { 214 const struct iscsi_bhs_scsi_command *bhssc; 215 struct cfiscsi_session *cs; 216 uint32_t cmdsn, curcmdsn; 217 218 cs = PDU_SESSION(request); 219 220 /* 221 * Every incoming PDU - not just NOP-Out - resets the ping timer. 222 * The purpose of the timeout is to reset the connection when it stalls; 223 * we don't want this to happen when NOP-In or NOP-Out ends up delayed 224 * in some queue. 225 */ 226 cs->cs_timeout = 0; 227 228 /* 229 * Immediate commands carry cmdsn, but it is neither incremented nor 230 * verified. 231 */ 232 if (request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) 233 return (false); 234 235 /* 236 * Data-Out PDUs don't contain CmdSN. 237 */ 238 if (request->ip_bhs->bhs_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 239 return (false); 240 241 /* 242 * We're only using fields common for all the request 243 * (initiator -> target) PDUs. 244 */ 245 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 246 curcmdsn = cmdsn = ntohl(bhssc->bhssc_cmdsn); 247 248 /* 249 * Increment session cmdsn and exit if we received the expected value. 250 */ 251 do { 252 if (atomic_fcmpset_32(&cs->cs_cmdsn, &curcmdsn, cmdsn + 1)) 253 return (false); 254 } while (curcmdsn == cmdsn); 255 256 /* 257 * The target MUST silently ignore any non-immediate command outside 258 * of this range. 259 */ 260 if (ISCSI_SNLT(cmdsn, curcmdsn) || 261 ISCSI_SNGT(cmdsn, curcmdsn - 1 + maxtags)) { 262 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 263 "while expected %u", cmdsn, curcmdsn); 264 return (true); 265 } 266 267 /* 268 * We don't support multiple connections now, so any discontinuity in 269 * CmdSN means lost PDUs. Since we don't support PDU retransmission -- 270 * terminate the connection. 271 */ 272 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %u, " 273 "while expected %u; dropping connection", 274 cmdsn, curcmdsn); 275 cfiscsi_session_terminate(cs); 276 return (true); 277 } 278 279 static void 280 cfiscsi_pdu_handle(struct icl_pdu *request) 281 { 282 struct cfiscsi_session *cs; 283 bool ignore; 284 285 cs = PDU_SESSION(request); 286 287 ignore = cfiscsi_pdu_update_cmdsn(request); 288 if (ignore) { 289 icl_pdu_free(request); 290 return; 291 } 292 293 /* 294 * Handle the PDU; this includes e.g. receiving the remaining 295 * part of PDU and submitting the SCSI command to CTL 296 * or queueing a reply. The handling routine is responsible 297 * for freeing the PDU when it's no longer needed. 298 */ 299 switch (request->ip_bhs->bhs_opcode & 300 ~ISCSI_BHS_OPCODE_IMMEDIATE) { 301 case ISCSI_BHS_OPCODE_NOP_OUT: 302 cfiscsi_pdu_handle_nop_out(request); 303 break; 304 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 305 cfiscsi_pdu_handle_scsi_command(request); 306 break; 307 case ISCSI_BHS_OPCODE_TASK_REQUEST: 308 cfiscsi_pdu_handle_task_request(request); 309 break; 310 case ISCSI_BHS_OPCODE_SCSI_DATA_OUT: 311 cfiscsi_pdu_handle_data_out(request); 312 break; 313 case ISCSI_BHS_OPCODE_LOGOUT_REQUEST: 314 cfiscsi_pdu_handle_logout_request(request); 315 break; 316 default: 317 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported " 318 "opcode 0x%x; dropping connection", 319 request->ip_bhs->bhs_opcode); 320 icl_pdu_free(request); 321 cfiscsi_session_terminate(cs); 322 } 323 324 } 325 326 static void 327 cfiscsi_receive_callback(struct icl_pdu *request) 328 { 329 #ifdef ICL_KERNEL_PROXY 330 struct cfiscsi_session *cs; 331 332 cs = PDU_SESSION(request); 333 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 334 if (cs->cs_login_pdu == NULL) 335 cs->cs_login_pdu = request; 336 else 337 icl_pdu_free(request); 338 cv_signal(&cs->cs_login_cv); 339 return; 340 } 341 #endif 342 343 cfiscsi_pdu_handle(request); 344 } 345 346 static void 347 cfiscsi_error_callback(struct icl_conn *ic) 348 { 349 struct cfiscsi_session *cs; 350 351 cs = CONN_SESSION(ic); 352 353 CFISCSI_SESSION_WARN(cs, "connection error; dropping connection"); 354 cfiscsi_session_terminate(cs); 355 } 356 357 static int 358 cfiscsi_pdu_prepare(struct icl_pdu *response) 359 { 360 struct cfiscsi_session *cs; 361 struct iscsi_bhs_scsi_response *bhssr; 362 bool advance_statsn = true; 363 uint32_t cmdsn; 364 365 cs = PDU_SESSION(response); 366 367 CFISCSI_SESSION_LOCK_ASSERT(cs); 368 369 /* 370 * We're only using fields common for all the response 371 * (target -> initiator) PDUs. 372 */ 373 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 374 375 /* 376 * 10.8.3: "The StatSN for this connection is not advanced 377 * after this PDU is sent." 378 */ 379 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T) 380 advance_statsn = false; 381 382 /* 383 * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff, 384 * StatSN for the connection is not advanced after this PDU is sent." 385 */ 386 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN && 387 bhssr->bhssr_initiator_task_tag == 0xffffffff) 388 advance_statsn = false; 389 390 /* 391 * See the comment below - StatSN is not meaningful and must 392 * not be advanced. 393 */ 394 if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN && 395 (bhssr->bhssr_flags & BHSDI_FLAGS_S) == 0) 396 advance_statsn = false; 397 398 /* 399 * 10.7.3: "The fields StatSN, Status, and Residual Count 400 * only have meaningful content if the S bit is set to 1." 401 */ 402 if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN || 403 (bhssr->bhssr_flags & BHSDI_FLAGS_S)) 404 bhssr->bhssr_statsn = htonl(cs->cs_statsn); 405 cmdsn = cs->cs_cmdsn; 406 bhssr->bhssr_expcmdsn = htonl(cmdsn); 407 bhssr->bhssr_maxcmdsn = htonl(cmdsn - 1 + 408 imax(0, maxtags - cs->cs_outstanding_ctl_pdus)); 409 410 if (advance_statsn) 411 cs->cs_statsn++; 412 413 return (0); 414 } 415 416 static void 417 cfiscsi_pdu_queue(struct icl_pdu *response) 418 { 419 struct cfiscsi_session *cs; 420 421 cs = PDU_SESSION(response); 422 423 CFISCSI_SESSION_LOCK(cs); 424 cfiscsi_pdu_prepare(response); 425 icl_pdu_queue(response); 426 CFISCSI_SESSION_UNLOCK(cs); 427 } 428 429 static void 430 cfiscsi_pdu_queue_cb(struct icl_pdu *response, icl_pdu_cb cb) 431 { 432 struct cfiscsi_session *cs = PDU_SESSION(response); 433 434 CFISCSI_SESSION_LOCK(cs); 435 cfiscsi_pdu_prepare(response); 436 icl_pdu_queue_cb(response, cb); 437 CFISCSI_SESSION_UNLOCK(cs); 438 } 439 440 static void 441 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request) 442 { 443 struct cfiscsi_session *cs; 444 struct iscsi_bhs_nop_out *bhsno; 445 struct iscsi_bhs_nop_in *bhsni; 446 struct icl_pdu *response; 447 void *data = NULL; 448 size_t datasize; 449 int error; 450 451 cs = PDU_SESSION(request); 452 bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs; 453 454 if (bhsno->bhsno_initiator_task_tag == 0xffffffff) { 455 /* 456 * Nothing to do, iscsi_pdu_update_statsn() already 457 * zeroed the timeout. 458 */ 459 icl_pdu_free(request); 460 return; 461 } 462 463 datasize = icl_pdu_data_segment_length(request); 464 if (datasize > 0) { 465 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO); 466 if (data == NULL) { 467 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 468 "dropping connection"); 469 icl_pdu_free(request); 470 cfiscsi_session_terminate(cs); 471 return; 472 } 473 icl_pdu_get_data(request, 0, data, datasize); 474 } 475 476 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 477 if (response == NULL) { 478 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 479 "droppping connection"); 480 free(data, M_CFISCSI); 481 icl_pdu_free(request); 482 cfiscsi_session_terminate(cs); 483 return; 484 } 485 bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs; 486 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 487 bhsni->bhsni_flags = 0x80; 488 bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag; 489 bhsni->bhsni_target_transfer_tag = 0xffffffff; 490 if (datasize > 0) { 491 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT); 492 if (error != 0) { 493 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 494 "dropping connection"); 495 free(data, M_CFISCSI); 496 icl_pdu_free(request); 497 icl_pdu_free(response); 498 cfiscsi_session_terminate(cs); 499 return; 500 } 501 free(data, M_CFISCSI); 502 } 503 504 icl_pdu_free(request); 505 cfiscsi_pdu_queue(response); 506 } 507 508 static void 509 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request) 510 { 511 struct iscsi_bhs_scsi_command *bhssc; 512 struct cfiscsi_session *cs; 513 union ctl_io *io; 514 int error; 515 516 cs = PDU_SESSION(request); 517 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 518 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 519 // bhssc->bhssc_initiator_task_tag); 520 521 if (request->ip_data_len > 0 && cs->cs_immediate_data == false) { 522 CFISCSI_SESSION_WARN(cs, "unsolicited data with " 523 "ImmediateData=No; dropping connection"); 524 icl_pdu_free(request); 525 cfiscsi_session_terminate(cs); 526 return; 527 } 528 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 529 ctl_zero_io(io); 530 PRIV_REQUEST(io) = request; 531 io->io_hdr.io_type = CTL_IO_SCSI; 532 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 533 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 534 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhssc->bhssc_lun)); 535 io->scsiio.priority = (bhssc->bhssc_pri & BHSSC_PRI_MASK) >> 536 BHSSC_PRI_SHIFT; 537 io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag; 538 switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) { 539 case BHSSC_FLAGS_ATTR_UNTAGGED: 540 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 541 break; 542 case BHSSC_FLAGS_ATTR_SIMPLE: 543 io->scsiio.tag_type = CTL_TAG_SIMPLE; 544 break; 545 case BHSSC_FLAGS_ATTR_ORDERED: 546 io->scsiio.tag_type = CTL_TAG_ORDERED; 547 break; 548 case BHSSC_FLAGS_ATTR_HOQ: 549 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE; 550 break; 551 case BHSSC_FLAGS_ATTR_ACA: 552 io->scsiio.tag_type = CTL_TAG_ACA; 553 break; 554 default: 555 io->scsiio.tag_type = CTL_TAG_UNTAGGED; 556 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d", 557 bhssc->bhssc_flags & BHSSC_FLAGS_ATTR); 558 break; 559 } 560 io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */ 561 memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb)); 562 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 563 error = ctl_run(io); 564 if (error != CTL_RETVAL_COMPLETE) { 565 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; " 566 "dropping connection", error); 567 ctl_free_io(io); 568 refcount_release(&cs->cs_outstanding_ctl_pdus); 569 icl_pdu_free(request); 570 cfiscsi_session_terminate(cs); 571 } 572 } 573 574 static void 575 cfiscsi_pdu_handle_task_request(struct icl_pdu *request) 576 { 577 struct iscsi_bhs_task_management_request *bhstmr; 578 struct iscsi_bhs_task_management_response *bhstmr2; 579 struct icl_pdu *response; 580 struct cfiscsi_session *cs; 581 union ctl_io *io; 582 int error; 583 584 cs = PDU_SESSION(request); 585 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 586 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 587 ctl_zero_io(io); 588 PRIV_REQUEST(io) = request; 589 io->io_hdr.io_type = CTL_IO_TASK; 590 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 591 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 592 io->io_hdr.nexus.targ_lun = ctl_decode_lun(be64toh(bhstmr->bhstmr_lun)); 593 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 594 595 switch (bhstmr->bhstmr_function & ~0x80) { 596 case BHSTMR_FUNCTION_ABORT_TASK: 597 #if 0 598 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK"); 599 #endif 600 io->taskio.task_action = CTL_TASK_ABORT_TASK; 601 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 602 break; 603 case BHSTMR_FUNCTION_ABORT_TASK_SET: 604 #if 0 605 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK_SET"); 606 #endif 607 io->taskio.task_action = CTL_TASK_ABORT_TASK_SET; 608 break; 609 case BHSTMR_FUNCTION_CLEAR_TASK_SET: 610 #if 0 611 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_CLEAR_TASK_SET"); 612 #endif 613 io->taskio.task_action = CTL_TASK_CLEAR_TASK_SET; 614 break; 615 case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET: 616 #if 0 617 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET"); 618 #endif 619 io->taskio.task_action = CTL_TASK_LUN_RESET; 620 break; 621 case BHSTMR_FUNCTION_TARGET_WARM_RESET: 622 #if 0 623 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET"); 624 #endif 625 io->taskio.task_action = CTL_TASK_TARGET_RESET; 626 break; 627 case BHSTMR_FUNCTION_TARGET_COLD_RESET: 628 #if 0 629 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_COLD_RESET"); 630 #endif 631 io->taskio.task_action = CTL_TASK_TARGET_RESET; 632 break; 633 case BHSTMR_FUNCTION_QUERY_TASK: 634 #if 0 635 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK"); 636 #endif 637 io->taskio.task_action = CTL_TASK_QUERY_TASK; 638 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag; 639 break; 640 case BHSTMR_FUNCTION_QUERY_TASK_SET: 641 #if 0 642 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_TASK_SET"); 643 #endif 644 io->taskio.task_action = CTL_TASK_QUERY_TASK_SET; 645 break; 646 case BHSTMR_FUNCTION_I_T_NEXUS_RESET: 647 #if 0 648 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_I_T_NEXUS_RESET"); 649 #endif 650 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 651 break; 652 case BHSTMR_FUNCTION_QUERY_ASYNC_EVENT: 653 #if 0 654 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_QUERY_ASYNC_EVENT"); 655 #endif 656 io->taskio.task_action = CTL_TASK_QUERY_ASYNC_EVENT; 657 break; 658 default: 659 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x", 660 bhstmr->bhstmr_function & ~0x80); 661 ctl_free_io(io); 662 663 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 664 if (response == NULL) { 665 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; " 666 "dropping connection"); 667 icl_pdu_free(request); 668 cfiscsi_session_terminate(cs); 669 return; 670 } 671 bhstmr2 = (struct iscsi_bhs_task_management_response *) 672 response->ip_bhs; 673 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 674 bhstmr2->bhstmr_flags = 0x80; 675 bhstmr2->bhstmr_response = 676 BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 677 bhstmr2->bhstmr_initiator_task_tag = 678 bhstmr->bhstmr_initiator_task_tag; 679 icl_pdu_free(request); 680 cfiscsi_pdu_queue(response); 681 return; 682 } 683 684 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 685 error = ctl_run(io); 686 if (error != CTL_RETVAL_COMPLETE) { 687 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d; " 688 "dropping connection", error); 689 ctl_free_io(io); 690 refcount_release(&cs->cs_outstanding_ctl_pdus); 691 icl_pdu_free(request); 692 cfiscsi_session_terminate(cs); 693 } 694 } 695 696 static bool 697 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw) 698 { 699 struct iscsi_bhs_data_out *bhsdo; 700 struct cfiscsi_session *cs; 701 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 702 size_t copy_len, len, off, buffer_offset; 703 int ctl_sg_count; 704 union ctl_io *io; 705 706 cs = PDU_SESSION(request); 707 708 KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 709 ISCSI_BHS_OPCODE_SCSI_DATA_OUT || 710 (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 711 ISCSI_BHS_OPCODE_SCSI_COMMAND, 712 ("bad opcode 0x%x", request->ip_bhs->bhs_opcode)); 713 714 /* 715 * We're only using fields common for Data-Out and SCSI Command PDUs. 716 */ 717 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 718 719 io = cdw->cdw_ctl_io; 720 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 721 ("CTL_FLAG_DATA_IN")); 722 723 #if 0 724 CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d", 725 request->ip_data_len, io->scsiio.kern_total_len); 726 #endif 727 728 if (io->scsiio.kern_sg_entries > 0) { 729 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 730 ctl_sg_count = io->scsiio.kern_sg_entries; 731 } else { 732 ctl_sglist = &ctl_sg_entry; 733 ctl_sglist->addr = io->scsiio.kern_data_ptr; 734 ctl_sglist->len = io->scsiio.kern_data_len; 735 ctl_sg_count = 1; 736 } 737 738 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 739 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) 740 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset); 741 else 742 buffer_offset = 0; 743 len = icl_pdu_data_segment_length(request); 744 745 /* 746 * Make sure the offset, as sent by the initiator, matches the offset 747 * we're supposed to be at in the scatter-gather list. 748 */ 749 if (buffer_offset > 750 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled || 751 buffer_offset + len <= 752 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) { 753 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, " 754 "expected %zd; dropping connection", buffer_offset, 755 (size_t)io->scsiio.kern_rel_offset + 756 (size_t)io->scsiio.ext_data_filled); 757 ctl_set_data_phase_error(&io->scsiio); 758 cfiscsi_session_terminate(cs); 759 return (true); 760 } 761 762 /* 763 * This is the offset within the PDU data segment, as opposed 764 * to buffer_offset, which is the offset within the task (SCSI 765 * command). 766 */ 767 off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled - 768 buffer_offset; 769 770 /* 771 * Iterate over the scatter/gather segments, filling them with data 772 * from the PDU data segment. Note that this can get called multiple 773 * times for one SCSI command; the cdw structure holds state for the 774 * scatter/gather list. 775 */ 776 for (;;) { 777 KASSERT(cdw->cdw_sg_index < ctl_sg_count, 778 ("cdw->cdw_sg_index >= ctl_sg_count")); 779 if (cdw->cdw_sg_len == 0) { 780 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 781 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 782 } 783 KASSERT(off <= len, ("len > off")); 784 copy_len = len - off; 785 if (copy_len > cdw->cdw_sg_len) 786 copy_len = cdw->cdw_sg_len; 787 788 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len); 789 cdw->cdw_sg_addr += copy_len; 790 cdw->cdw_sg_len -= copy_len; 791 off += copy_len; 792 io->scsiio.ext_data_filled += copy_len; 793 io->scsiio.kern_data_resid -= copy_len; 794 795 if (cdw->cdw_sg_len == 0) { 796 /* 797 * End of current segment. 798 */ 799 if (cdw->cdw_sg_index == ctl_sg_count - 1) { 800 /* 801 * Last segment in scatter/gather list. 802 */ 803 break; 804 } 805 cdw->cdw_sg_index++; 806 } 807 808 if (off == len) { 809 /* 810 * End of PDU payload. 811 */ 812 break; 813 } 814 } 815 816 if (len > off) { 817 /* 818 * In case of unsolicited data, it's possible that the buffer 819 * provided by CTL is smaller than negotiated FirstBurstLength. 820 * Just ignore the superfluous data; will ask for them with R2T 821 * on next call to cfiscsi_datamove(). 822 * 823 * This obviously can only happen with SCSI Command PDU. 824 */ 825 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 826 ISCSI_BHS_OPCODE_SCSI_COMMAND) 827 return (true); 828 829 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, " 830 "expected %zd; dropping connection", 831 icl_pdu_data_segment_length(request), off); 832 ctl_set_data_phase_error(&io->scsiio); 833 cfiscsi_session_terminate(cs); 834 return (true); 835 } 836 837 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end && 838 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) { 839 CFISCSI_SESSION_WARN(cs, "got the final packet without " 840 "the F flag; flags = 0x%x; dropping connection", 841 bhsdo->bhsdo_flags); 842 ctl_set_data_phase_error(&io->scsiio); 843 cfiscsi_session_terminate(cs); 844 return (true); 845 } 846 847 if (io->scsiio.ext_data_filled != cdw->cdw_r2t_end && 848 (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) { 849 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 850 ISCSI_BHS_OPCODE_SCSI_DATA_OUT) { 851 CFISCSI_SESSION_WARN(cs, "got the final packet, but the " 852 "transmitted size was %zd bytes instead of %d; " 853 "dropping connection", 854 (size_t)io->scsiio.ext_data_filled, 855 cdw->cdw_r2t_end); 856 ctl_set_data_phase_error(&io->scsiio); 857 cfiscsi_session_terminate(cs); 858 return (true); 859 } else { 860 /* 861 * For SCSI Command PDU, this just means we need to 862 * solicit more data by sending R2T. 863 */ 864 return (false); 865 } 866 } 867 868 if (io->scsiio.ext_data_filled == cdw->cdw_r2t_end) { 869 #if 0 870 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target " 871 "transfer tag 0x%x", cdw->cdw_target_transfer_tag); 872 #endif 873 874 return (true); 875 } 876 877 return (false); 878 } 879 880 static void 881 cfiscsi_pdu_handle_data_out(struct icl_pdu *request) 882 { 883 struct iscsi_bhs_data_out *bhsdo; 884 struct cfiscsi_session *cs; 885 struct cfiscsi_data_wait *cdw = NULL; 886 union ctl_io *io; 887 bool done; 888 889 cs = PDU_SESSION(request); 890 bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs; 891 892 CFISCSI_SESSION_LOCK(cs); 893 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) { 894 #if 0 895 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for " 896 "ttt 0x%x, itt 0x%x", 897 bhsdo->bhsdo_target_transfer_tag, 898 bhsdo->bhsdo_initiator_task_tag, 899 cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag)); 900 #endif 901 if (bhsdo->bhsdo_target_transfer_tag == 902 cdw->cdw_target_transfer_tag) 903 break; 904 } 905 CFISCSI_SESSION_UNLOCK(cs); 906 if (cdw == NULL) { 907 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag " 908 "0x%x, not found; dropping connection", 909 bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag); 910 icl_pdu_free(request); 911 cfiscsi_session_terminate(cs); 912 return; 913 } 914 915 if (cdw->cdw_datasn != ntohl(bhsdo->bhsdo_datasn)) { 916 CFISCSI_SESSION_WARN(cs, "received Data-Out PDU with " 917 "DataSN %u, while expected %u; dropping connection", 918 ntohl(bhsdo->bhsdo_datasn), cdw->cdw_datasn); 919 icl_pdu_free(request); 920 cfiscsi_session_terminate(cs); 921 return; 922 } 923 cdw->cdw_datasn += request->ip_additional_pdus + 1; 924 925 io = cdw->cdw_ctl_io; 926 KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN, 927 ("CTL_FLAG_DATA_IN")); 928 929 done = cfiscsi_handle_data_segment(request, cdw); 930 if (done) { 931 CFISCSI_SESSION_LOCK(cs); 932 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 933 CFISCSI_SESSION_UNLOCK(cs); 934 done = (io->scsiio.ext_data_filled != cdw->cdw_r2t_end || 935 io->scsiio.ext_data_filled == io->scsiio.kern_data_len); 936 cfiscsi_data_wait_free(cs, cdw); 937 io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 938 if (done) 939 ctl_datamove_done(io, false); 940 else 941 cfiscsi_datamove_out(io); 942 } 943 944 icl_pdu_free(request); 945 } 946 947 static void 948 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request) 949 { 950 struct iscsi_bhs_logout_request *bhslr; 951 struct iscsi_bhs_logout_response *bhslr2; 952 struct icl_pdu *response; 953 struct cfiscsi_session *cs; 954 955 cs = PDU_SESSION(request); 956 bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs; 957 switch (bhslr->bhslr_reason & 0x7f) { 958 case BHSLR_REASON_CLOSE_SESSION: 959 case BHSLR_REASON_CLOSE_CONNECTION: 960 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 961 if (response == NULL) { 962 CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory"); 963 icl_pdu_free(request); 964 cfiscsi_session_terminate(cs); 965 return; 966 } 967 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 968 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 969 bhslr2->bhslr_flags = 0x80; 970 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY; 971 bhslr2->bhslr_initiator_task_tag = 972 bhslr->bhslr_initiator_task_tag; 973 icl_pdu_free(request); 974 cfiscsi_pdu_queue(response); 975 cfiscsi_session_terminate(cs); 976 break; 977 case BHSLR_REASON_REMOVE_FOR_RECOVERY: 978 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 979 if (response == NULL) { 980 CFISCSI_SESSION_WARN(cs, 981 "failed to allocate memory; dropping connection"); 982 icl_pdu_free(request); 983 cfiscsi_session_terminate(cs); 984 return; 985 } 986 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs; 987 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE; 988 bhslr2->bhslr_flags = 0x80; 989 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED; 990 bhslr2->bhslr_initiator_task_tag = 991 bhslr->bhslr_initiator_task_tag; 992 icl_pdu_free(request); 993 cfiscsi_pdu_queue(response); 994 break; 995 default: 996 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection", 997 bhslr->bhslr_reason); 998 icl_pdu_free(request); 999 cfiscsi_session_terminate(cs); 1000 break; 1001 } 1002 } 1003 1004 static void 1005 cfiscsi_callout(void *context) 1006 { 1007 struct icl_pdu *cp; 1008 struct iscsi_bhs_nop_in *bhsni; 1009 struct cfiscsi_session *cs; 1010 1011 cs = context; 1012 1013 if (cs->cs_terminating) 1014 return; 1015 1016 callout_schedule(&cs->cs_callout, 1 * hz); 1017 1018 atomic_add_int(&cs->cs_timeout, 1); 1019 1020 #ifdef ICL_KERNEL_PROXY 1021 if (cs->cs_waiting_for_ctld || cs->cs_login_phase) { 1022 if (login_timeout > 0 && cs->cs_timeout > login_timeout) { 1023 CFISCSI_SESSION_WARN(cs, "login timed out after " 1024 "%d seconds; dropping connection", cs->cs_timeout); 1025 cfiscsi_session_terminate(cs); 1026 } 1027 return; 1028 } 1029 #endif 1030 1031 if (ping_timeout <= 0) { 1032 /* 1033 * Pings are disabled. Don't send NOP-In in this case; 1034 * user might have disabled pings to work around problems 1035 * with certain initiators that can't properly handle 1036 * NOP-In, such as iPXE. Reset the timeout, to avoid 1037 * triggering reconnection, should the user decide to 1038 * reenable them. 1039 */ 1040 cs->cs_timeout = 0; 1041 return; 1042 } 1043 1044 if (cs->cs_timeout >= ping_timeout) { 1045 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; " 1046 "dropping connection", ping_timeout); 1047 cfiscsi_session_terminate(cs); 1048 return; 1049 } 1050 1051 /* 1052 * If the ping was reset less than one second ago - which means 1053 * that we've received some PDU during the last second - assume 1054 * the traffic flows correctly and don't bother sending a NOP-Out. 1055 * 1056 * (It's 2 - one for one second, and one for incrementing is_timeout 1057 * earlier in this routine.) 1058 */ 1059 if (cs->cs_timeout < 2) 1060 return; 1061 1062 cp = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1063 if (cp == NULL) { 1064 CFISCSI_SESSION_WARN(cs, "failed to allocate memory"); 1065 return; 1066 } 1067 bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs; 1068 bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN; 1069 bhsni->bhsni_flags = 0x80; 1070 bhsni->bhsni_initiator_task_tag = 0xffffffff; 1071 1072 cfiscsi_pdu_queue(cp); 1073 } 1074 1075 static struct cfiscsi_data_wait * 1076 cfiscsi_data_wait_new(struct cfiscsi_session *cs, union ctl_io *io, 1077 uint32_t initiator_task_tag, uint32_t *target_transfer_tagp) 1078 { 1079 struct cfiscsi_data_wait *cdw; 1080 int error; 1081 1082 cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO); 1083 if (cdw == NULL) { 1084 CFISCSI_SESSION_WARN(cs, 1085 "failed to allocate %zd bytes", sizeof(*cdw)); 1086 return (NULL); 1087 } 1088 1089 error = icl_conn_transfer_setup(cs->cs_conn, PRIV_REQUEST(io), io, 1090 target_transfer_tagp, &cdw->cdw_icl_prv); 1091 if (error != 0) { 1092 CFISCSI_SESSION_WARN(cs, 1093 "icl_conn_transfer_setup() failed with error %d", error); 1094 uma_zfree(cfiscsi_data_wait_zone, cdw); 1095 return (NULL); 1096 } 1097 1098 cdw->cdw_ctl_io = io; 1099 cdw->cdw_target_transfer_tag = *target_transfer_tagp; 1100 cdw->cdw_initiator_task_tag = initiator_task_tag; 1101 1102 return (cdw); 1103 } 1104 1105 static void 1106 cfiscsi_data_wait_free(struct cfiscsi_session *cs, 1107 struct cfiscsi_data_wait *cdw) 1108 { 1109 1110 icl_conn_transfer_done(cs->cs_conn, cdw->cdw_icl_prv); 1111 uma_zfree(cfiscsi_data_wait_zone, cdw); 1112 } 1113 1114 static void 1115 cfiscsi_data_wait_abort(struct cfiscsi_session *cs, 1116 struct cfiscsi_data_wait *cdw, int status) 1117 { 1118 union ctl_io *cdw_io; 1119 1120 /* 1121 * Set nonzero port status; this prevents backends from 1122 * assuming that the data transfer actually succeeded 1123 * and writing uninitialized data to disk. 1124 */ 1125 MPASS(status != 0); 1126 cdw_io = cdw->cdw_ctl_io; 1127 cdw_io->io_hdr.flags &= ~CTL_FLAG_DMA_INPROG; 1128 cdw_io->scsiio.io_hdr.port_status = status; 1129 cfiscsi_data_wait_free(cs, cdw); 1130 ctl_datamove_done(cdw_io, false); 1131 } 1132 1133 static void 1134 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs) 1135 { 1136 struct cfiscsi_data_wait *cdw; 1137 struct icl_pdu *ip; 1138 union ctl_io *io; 1139 int error, last, wait; 1140 1141 if (cs->cs_target == NULL) 1142 return; /* No target yet, so nothing to do. */ 1143 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 1144 ip->ip_bhs->bhs_opcode = ISCSI_BHS_OPCODE_INTERNAL; 1145 io = ctl_alloc_io(cs->cs_target->ct_port.ctl_pool_ref); 1146 ctl_zero_io(io); 1147 PRIV_REQUEST(io) = ip; 1148 io->io_hdr.io_type = CTL_IO_TASK; 1149 io->io_hdr.nexus.initid = cs->cs_ctl_initid; 1150 io->io_hdr.nexus.targ_port = cs->cs_target->ct_port.targ_port; 1151 io->io_hdr.nexus.targ_lun = 0; 1152 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */ 1153 io->taskio.task_action = CTL_TASK_I_T_NEXUS_RESET; 1154 wait = cs->cs_outstanding_ctl_pdus; 1155 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1156 error = ctl_run(io); 1157 if (error != CTL_RETVAL_COMPLETE) { 1158 CFISCSI_SESSION_WARN(cs, "ctl_run() failed; error %d", error); 1159 refcount_release(&cs->cs_outstanding_ctl_pdus); 1160 ctl_free_io(io); 1161 icl_pdu_free(ip); 1162 } 1163 1164 CFISCSI_SESSION_LOCK(cs); 1165 cs->cs_terminating_tasks = true; 1166 while ((cdw = TAILQ_FIRST(&cs->cs_waiting_for_data_out)) != NULL) { 1167 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next); 1168 CFISCSI_SESSION_UNLOCK(cs); 1169 cfiscsi_data_wait_abort(cs, cdw, 42); 1170 CFISCSI_SESSION_LOCK(cs); 1171 } 1172 CFISCSI_SESSION_UNLOCK(cs); 1173 1174 /* 1175 * Wait for CTL to terminate all the tasks. 1176 */ 1177 if (wait > 0) 1178 CFISCSI_SESSION_WARN(cs, 1179 "waiting for CTL to terminate %d tasks", wait); 1180 for (;;) { 1181 refcount_acquire(&cs->cs_outstanding_ctl_pdus); 1182 last = refcount_release(&cs->cs_outstanding_ctl_pdus); 1183 if (last != 0) 1184 break; 1185 tsleep(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus), 1186 0, "cfiscsi_terminate", hz / 100); 1187 } 1188 if (wait > 0) 1189 CFISCSI_SESSION_WARN(cs, "tasks terminated"); 1190 } 1191 1192 static void 1193 cfiscsi_maintenance_thread(void *arg) 1194 { 1195 struct cfiscsi_session *cs; 1196 1197 cs = arg; 1198 1199 for (;;) { 1200 CFISCSI_SESSION_LOCK(cs); 1201 if (cs->cs_terminating == false || cs->cs_handoff_in_progress) 1202 cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock); 1203 CFISCSI_SESSION_UNLOCK(cs); 1204 1205 if (cs->cs_terminating && cs->cs_handoff_in_progress == false) { 1206 /* 1207 * We used to wait up to 30 seconds to deliver queued 1208 * PDUs to the initiator. We also tried hard to deliver 1209 * SCSI Responses for the aborted PDUs. We don't do 1210 * that anymore. We might need to revisit that. 1211 */ 1212 callout_drain(&cs->cs_callout); 1213 icl_conn_close(cs->cs_conn); 1214 1215 /* 1216 * At this point ICL receive thread is no longer 1217 * running; no new tasks can be queued. 1218 */ 1219 cfiscsi_session_terminate_tasks(cs); 1220 cfiscsi_session_delete(cs); 1221 kthread_exit(); 1222 return; 1223 } 1224 CFISCSI_SESSION_DEBUG(cs, "nothing to do"); 1225 } 1226 } 1227 1228 static void 1229 cfiscsi_session_terminate(struct cfiscsi_session *cs) 1230 { 1231 1232 cs->cs_terminating = true; 1233 cv_signal(&cs->cs_maintenance_cv); 1234 #ifdef ICL_KERNEL_PROXY 1235 cv_signal(&cs->cs_login_cv); 1236 #endif 1237 } 1238 1239 static int 1240 cfiscsi_session_register_initiator(struct cfiscsi_session *cs) 1241 { 1242 struct cfiscsi_target *ct; 1243 char *name; 1244 int i; 1245 1246 KASSERT(cs->cs_ctl_initid == -1, ("already registered")); 1247 1248 ct = cs->cs_target; 1249 name = strdup(cs->cs_initiator_id, M_CTL); 1250 i = ctl_add_initiator(&ct->ct_port, -1, 0, name); 1251 if (i < 0) { 1252 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", 1253 i); 1254 cs->cs_ctl_initid = -1; 1255 return (1); 1256 } 1257 cs->cs_ctl_initid = i; 1258 #if 0 1259 CFISCSI_SESSION_DEBUG(cs, "added initiator id %d", i); 1260 #endif 1261 1262 return (0); 1263 } 1264 1265 static void 1266 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs) 1267 { 1268 int error; 1269 1270 if (cs->cs_ctl_initid == -1) 1271 return; 1272 1273 error = ctl_remove_initiator(&cs->cs_target->ct_port, cs->cs_ctl_initid); 1274 if (error != 0) { 1275 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d", 1276 error); 1277 } 1278 cs->cs_ctl_initid = -1; 1279 } 1280 1281 static struct cfiscsi_session * 1282 cfiscsi_session_new(struct cfiscsi_softc *softc, const char *offload) 1283 { 1284 struct cfiscsi_session *cs; 1285 int error; 1286 1287 cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO); 1288 if (cs == NULL) { 1289 CFISCSI_WARN("malloc failed"); 1290 return (NULL); 1291 } 1292 cs->cs_ctl_initid = -1; 1293 1294 refcount_init(&cs->cs_outstanding_ctl_pdus, 0); 1295 TAILQ_INIT(&cs->cs_waiting_for_data_out); 1296 mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF); 1297 cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt"); 1298 #ifdef ICL_KERNEL_PROXY 1299 cv_init(&cs->cs_login_cv, "cfiscsi_login"); 1300 #endif 1301 1302 /* 1303 * The purpose of this is to avoid racing with session shutdown. 1304 * Otherwise we could have the maintenance thread call icl_conn_close() 1305 * before we call icl_conn_handoff(). 1306 */ 1307 cs->cs_handoff_in_progress = true; 1308 1309 cs->cs_conn = icl_new_conn(offload, false, "cfiscsi", &cs->cs_lock); 1310 if (cs->cs_conn == NULL) { 1311 free(cs, M_CFISCSI); 1312 return (NULL); 1313 } 1314 cs->cs_conn->ic_receive = cfiscsi_receive_callback; 1315 cs->cs_conn->ic_error = cfiscsi_error_callback; 1316 cs->cs_conn->ic_prv0 = cs; 1317 1318 error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt"); 1319 if (error != 0) { 1320 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error); 1321 free(cs, M_CFISCSI); 1322 return (NULL); 1323 } 1324 1325 mtx_lock(&softc->lock); 1326 cs->cs_id = ++softc->last_session_id; 1327 TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next); 1328 mtx_unlock(&softc->lock); 1329 1330 /* 1331 * Start pinging the initiator. 1332 */ 1333 callout_init(&cs->cs_callout, 1); 1334 callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs); 1335 1336 return (cs); 1337 } 1338 1339 static void 1340 cfiscsi_session_delete(struct cfiscsi_session *cs) 1341 { 1342 struct cfiscsi_softc *softc; 1343 1344 softc = &cfiscsi_softc; 1345 1346 KASSERT(cs->cs_outstanding_ctl_pdus == 0, 1347 ("destroying session with outstanding CTL pdus")); 1348 KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out), 1349 ("destroying session with non-empty queue")); 1350 1351 mtx_lock(&softc->lock); 1352 TAILQ_REMOVE(&softc->sessions, cs, cs_next); 1353 mtx_unlock(&softc->lock); 1354 1355 cfiscsi_session_unregister_initiator(cs); 1356 if (cs->cs_target != NULL) 1357 cfiscsi_target_release(cs->cs_target); 1358 icl_conn_close(cs->cs_conn); 1359 icl_conn_free(cs->cs_conn); 1360 free(cs, M_CFISCSI); 1361 cv_signal(&softc->sessions_cv); 1362 } 1363 1364 static int 1365 cfiscsi_init(void) 1366 { 1367 struct cfiscsi_softc *softc; 1368 1369 softc = &cfiscsi_softc; 1370 bzero(softc, sizeof(*softc)); 1371 mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF); 1372 1373 cv_init(&softc->sessions_cv, "cfiscsi_sessions"); 1374 #ifdef ICL_KERNEL_PROXY 1375 cv_init(&softc->accept_cv, "cfiscsi_accept"); 1376 #endif 1377 TAILQ_INIT(&softc->sessions); 1378 TAILQ_INIT(&softc->targets); 1379 1380 cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait", 1381 sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL, 1382 UMA_ALIGN_PTR, 0); 1383 1384 return (0); 1385 } 1386 1387 static int 1388 cfiscsi_shutdown(void) 1389 { 1390 struct cfiscsi_softc *softc = &cfiscsi_softc; 1391 1392 if (!TAILQ_EMPTY(&softc->sessions) || !TAILQ_EMPTY(&softc->targets)) 1393 return (EBUSY); 1394 1395 uma_zdestroy(cfiscsi_data_wait_zone); 1396 #ifdef ICL_KERNEL_PROXY 1397 cv_destroy(&softc->accept_cv); 1398 #endif 1399 cv_destroy(&softc->sessions_cv); 1400 mtx_destroy(&softc->lock); 1401 return (0); 1402 } 1403 1404 #ifdef ICL_KERNEL_PROXY 1405 static void 1406 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id) 1407 { 1408 struct cfiscsi_session *cs; 1409 1410 cs = cfiscsi_session_new(&cfiscsi_softc, NULL); 1411 if (cs == NULL) { 1412 CFISCSI_WARN("failed to create session"); 1413 return; 1414 } 1415 1416 icl_conn_handoff_sock(cs->cs_conn, so); 1417 cs->cs_initiator_sa = sa; 1418 cs->cs_portal_id = portal_id; 1419 cs->cs_handoff_in_progress = false; 1420 cs->cs_waiting_for_ctld = true; 1421 cv_signal(&cfiscsi_softc.accept_cv); 1422 1423 CFISCSI_SESSION_LOCK(cs); 1424 /* 1425 * Wake up the maintenance thread if we got scheduled for termination 1426 * somewhere between cfiscsi_session_new() and icl_conn_handoff_sock(). 1427 */ 1428 if (cs->cs_terminating) 1429 cfiscsi_session_terminate(cs); 1430 CFISCSI_SESSION_UNLOCK(cs); 1431 } 1432 #endif 1433 1434 static void 1435 cfiscsi_online(void *arg) 1436 { 1437 struct cfiscsi_softc *softc; 1438 struct cfiscsi_target *ct; 1439 int online; 1440 1441 ct = (struct cfiscsi_target *)arg; 1442 softc = ct->ct_softc; 1443 1444 mtx_lock(&softc->lock); 1445 if (ct->ct_online) { 1446 mtx_unlock(&softc->lock); 1447 return; 1448 } 1449 ct->ct_online = 1; 1450 online = softc->online++; 1451 mtx_unlock(&softc->lock); 1452 if (online > 0) 1453 return; 1454 1455 #ifdef ICL_KERNEL_PROXY 1456 if (softc->listener != NULL) 1457 icl_listen_free(softc->listener); 1458 softc->listener = icl_listen_new(cfiscsi_accept); 1459 #endif 1460 } 1461 1462 static void 1463 cfiscsi_offline(void *arg) 1464 { 1465 struct cfiscsi_softc *softc; 1466 struct cfiscsi_target *ct; 1467 struct cfiscsi_session *cs; 1468 int error, online; 1469 1470 ct = (struct cfiscsi_target *)arg; 1471 softc = ct->ct_softc; 1472 1473 mtx_lock(&softc->lock); 1474 if (!ct->ct_online) { 1475 mtx_unlock(&softc->lock); 1476 return; 1477 } 1478 ct->ct_online = 0; 1479 online = --softc->online; 1480 1481 do { 1482 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1483 if (cs->cs_target == ct) 1484 cfiscsi_session_terminate(cs); 1485 } 1486 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1487 if (cs->cs_target == ct) 1488 break; 1489 } 1490 if (cs != NULL) { 1491 error = cv_wait_sig(&softc->sessions_cv, &softc->lock); 1492 if (error != 0) { 1493 CFISCSI_SESSION_DEBUG(cs, 1494 "cv_wait failed with error %d\n", error); 1495 break; 1496 } 1497 } 1498 } while (cs != NULL && ct->ct_online == 0); 1499 mtx_unlock(&softc->lock); 1500 if (online > 0) 1501 return; 1502 1503 #ifdef ICL_KERNEL_PROXY 1504 icl_listen_free(softc->listener); 1505 softc->listener = NULL; 1506 #endif 1507 } 1508 1509 static int 1510 cfiscsi_info(void *arg, struct sbuf *sb) 1511 { 1512 struct cfiscsi_target *ct = (struct cfiscsi_target *)arg; 1513 int retval; 1514 1515 retval = sbuf_printf(sb, "\t<cfiscsi_state>%d</cfiscsi_state>\n", 1516 ct->ct_state); 1517 return (retval); 1518 } 1519 1520 static void 1521 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci) 1522 { 1523 struct cfiscsi_softc *softc; 1524 struct cfiscsi_session *cs, *cs2; 1525 struct cfiscsi_target *ct; 1526 struct ctl_iscsi_handoff_params *cihp; 1527 int error; 1528 1529 cihp = (struct ctl_iscsi_handoff_params *)&(ci->data); 1530 softc = &cfiscsi_softc; 1531 1532 CFISCSI_DEBUG("new connection from %s (%s) to %s", 1533 cihp->initiator_name, cihp->initiator_addr, 1534 cihp->target_name); 1535 1536 ct = cfiscsi_target_find(softc, cihp->target_name, 1537 cihp->portal_group_tag); 1538 if (ct == NULL) { 1539 ci->status = CTL_ISCSI_ERROR; 1540 snprintf(ci->error_str, sizeof(ci->error_str), 1541 "%s: target not found", __func__); 1542 return; 1543 } 1544 1545 #ifdef ICL_KERNEL_PROXY 1546 if (cihp->socket > 0 && cihp->connection_id > 0) { 1547 snprintf(ci->error_str, sizeof(ci->error_str), 1548 "both socket and connection_id set"); 1549 ci->status = CTL_ISCSI_ERROR; 1550 cfiscsi_target_release(ct); 1551 return; 1552 } 1553 if (cihp->socket == 0) { 1554 mtx_lock(&cfiscsi_softc.lock); 1555 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1556 if (cs->cs_id == cihp->connection_id) 1557 break; 1558 } 1559 if (cs == NULL) { 1560 mtx_unlock(&cfiscsi_softc.lock); 1561 snprintf(ci->error_str, sizeof(ci->error_str), 1562 "connection not found"); 1563 ci->status = CTL_ISCSI_ERROR; 1564 cfiscsi_target_release(ct); 1565 return; 1566 } 1567 mtx_unlock(&cfiscsi_softc.lock); 1568 } else { 1569 #endif 1570 cs = cfiscsi_session_new(softc, cihp->offload); 1571 if (cs == NULL) { 1572 ci->status = CTL_ISCSI_ERROR; 1573 snprintf(ci->error_str, sizeof(ci->error_str), 1574 "%s: cfiscsi_session_new failed", __func__); 1575 cfiscsi_target_release(ct); 1576 return; 1577 } 1578 #ifdef ICL_KERNEL_PROXY 1579 } 1580 #endif 1581 1582 /* 1583 * First PDU of Full Feature phase has the same CmdSN as the last 1584 * PDU from the Login Phase received from the initiator. Thus, 1585 * the -1 below. 1586 */ 1587 cs->cs_cmdsn = cihp->cmdsn; 1588 cs->cs_statsn = cihp->statsn; 1589 cs->cs_conn->ic_max_recv_data_segment_length = 1590 cihp->max_recv_data_segment_length; 1591 cs->cs_conn->ic_max_send_data_segment_length = 1592 cihp->max_send_data_segment_length; 1593 cs->cs_max_burst_length = cihp->max_burst_length; 1594 cs->cs_first_burst_length = cihp->first_burst_length; 1595 cs->cs_immediate_data = !!cihp->immediate_data; 1596 if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C) 1597 cs->cs_conn->ic_header_crc32c = true; 1598 if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C) 1599 cs->cs_conn->ic_data_crc32c = true; 1600 1601 strlcpy(cs->cs_initiator_name, 1602 cihp->initiator_name, sizeof(cs->cs_initiator_name)); 1603 strlcpy(cs->cs_initiator_addr, 1604 cihp->initiator_addr, sizeof(cs->cs_initiator_addr)); 1605 strlcpy(cs->cs_initiator_alias, 1606 cihp->initiator_alias, sizeof(cs->cs_initiator_alias)); 1607 memcpy(cs->cs_initiator_isid, 1608 cihp->initiator_isid, sizeof(cs->cs_initiator_isid)); 1609 snprintf(cs->cs_initiator_id, sizeof(cs->cs_initiator_id), 1610 "%s,i,0x%02x%02x%02x%02x%02x%02x", cs->cs_initiator_name, 1611 cihp->initiator_isid[0], cihp->initiator_isid[1], 1612 cihp->initiator_isid[2], cihp->initiator_isid[3], 1613 cihp->initiator_isid[4], cihp->initiator_isid[5]); 1614 1615 mtx_lock(&softc->lock); 1616 if (ct->ct_online == 0) { 1617 mtx_unlock(&softc->lock); 1618 CFISCSI_SESSION_LOCK(cs); 1619 cs->cs_handoff_in_progress = false; 1620 cfiscsi_session_terminate(cs); 1621 CFISCSI_SESSION_UNLOCK(cs); 1622 cfiscsi_target_release(ct); 1623 ci->status = CTL_ISCSI_ERROR; 1624 snprintf(ci->error_str, sizeof(ci->error_str), 1625 "%s: port offline", __func__); 1626 return; 1627 } 1628 cs->cs_target = ct; 1629 mtx_unlock(&softc->lock); 1630 1631 restart: 1632 if (!cs->cs_terminating) { 1633 mtx_lock(&softc->lock); 1634 TAILQ_FOREACH(cs2, &softc->sessions, cs_next) { 1635 if (cs2 != cs && cs2->cs_tasks_aborted == false && 1636 cs->cs_target == cs2->cs_target && 1637 strcmp(cs->cs_initiator_id, cs2->cs_initiator_id) == 0) { 1638 if (strcmp(cs->cs_initiator_addr, 1639 cs2->cs_initiator_addr) != 0) { 1640 CFISCSI_SESSION_WARN(cs2, 1641 "session reinstatement from " 1642 "different address %s", 1643 cs->cs_initiator_addr); 1644 } else { 1645 CFISCSI_SESSION_DEBUG(cs2, 1646 "session reinstatement"); 1647 } 1648 cfiscsi_session_terminate(cs2); 1649 mtx_unlock(&softc->lock); 1650 pause("cfiscsi_reinstate", 1); 1651 goto restart; 1652 } 1653 } 1654 mtx_unlock(&softc->lock); 1655 } 1656 1657 /* 1658 * Register initiator with CTL. 1659 */ 1660 cfiscsi_session_register_initiator(cs); 1661 1662 #ifdef ICL_KERNEL_PROXY 1663 if (cihp->socket > 0) { 1664 #endif 1665 error = icl_conn_handoff(cs->cs_conn, cihp->socket); 1666 if (error != 0) { 1667 CFISCSI_SESSION_LOCK(cs); 1668 cs->cs_handoff_in_progress = false; 1669 cfiscsi_session_terminate(cs); 1670 CFISCSI_SESSION_UNLOCK(cs); 1671 ci->status = CTL_ISCSI_ERROR; 1672 snprintf(ci->error_str, sizeof(ci->error_str), 1673 "%s: icl_conn_handoff failed with error %d", 1674 __func__, error); 1675 return; 1676 } 1677 #ifdef ICL_KERNEL_PROXY 1678 } 1679 #endif 1680 1681 #ifdef ICL_KERNEL_PROXY 1682 cs->cs_login_phase = false; 1683 1684 /* 1685 * First PDU of the Full Feature phase has likely already arrived. 1686 * We have to pick it up and execute properly. 1687 */ 1688 if (cs->cs_login_pdu != NULL) { 1689 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU"); 1690 cfiscsi_pdu_handle(cs->cs_login_pdu); 1691 cs->cs_login_pdu = NULL; 1692 } 1693 #endif 1694 1695 CFISCSI_SESSION_LOCK(cs); 1696 cs->cs_handoff_in_progress = false; 1697 1698 /* 1699 * Wake up the maintenance thread if we got scheduled for termination. 1700 */ 1701 if (cs->cs_terminating) 1702 cfiscsi_session_terminate(cs); 1703 CFISCSI_SESSION_UNLOCK(cs); 1704 1705 ci->status = CTL_ISCSI_OK; 1706 } 1707 1708 static void 1709 cfiscsi_ioctl_list(struct ctl_iscsi *ci) 1710 { 1711 struct ctl_iscsi_list_params *cilp; 1712 struct cfiscsi_session *cs; 1713 struct cfiscsi_softc *softc; 1714 struct sbuf *sb; 1715 int error; 1716 1717 cilp = (struct ctl_iscsi_list_params *)&(ci->data); 1718 softc = &cfiscsi_softc; 1719 1720 sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN); 1721 if (sb == NULL) { 1722 ci->status = CTL_ISCSI_ERROR; 1723 snprintf(ci->error_str, sizeof(ci->error_str), 1724 "Unable to allocate %d bytes for iSCSI session list", 1725 cilp->alloc_len); 1726 return; 1727 } 1728 1729 sbuf_printf(sb, "<ctlislist>\n"); 1730 mtx_lock(&softc->lock); 1731 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1732 if (cs->cs_target == NULL) 1733 continue; 1734 error = sbuf_printf(sb, "<connection id=\"%d\">" 1735 "<initiator>%s</initiator>" 1736 "<initiator_addr>%s</initiator_addr>" 1737 "<initiator_alias>%s</initiator_alias>" 1738 "<target>%s</target>" 1739 "<target_alias>%s</target_alias>" 1740 "<target_portal_group_tag>%u</target_portal_group_tag>" 1741 "<header_digest>%s</header_digest>" 1742 "<data_digest>%s</data_digest>" 1743 "<max_recv_data_segment_length>%d</max_recv_data_segment_length>" 1744 "<max_send_data_segment_length>%d</max_send_data_segment_length>" 1745 "<max_burst_length>%d</max_burst_length>" 1746 "<first_burst_length>%d</first_burst_length>" 1747 "<immediate_data>%d</immediate_data>" 1748 "<iser>%d</iser>" 1749 "<offload>%s</offload>" 1750 "</connection>\n", 1751 cs->cs_id, 1752 cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias, 1753 cs->cs_target->ct_name, cs->cs_target->ct_alias, 1754 cs->cs_target->ct_tag, 1755 cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None", 1756 cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None", 1757 cs->cs_conn->ic_max_recv_data_segment_length, 1758 cs->cs_conn->ic_max_send_data_segment_length, 1759 cs->cs_max_burst_length, 1760 cs->cs_first_burst_length, 1761 cs->cs_immediate_data, 1762 cs->cs_conn->ic_iser, 1763 cs->cs_conn->ic_offload); 1764 if (error != 0) 1765 break; 1766 } 1767 mtx_unlock(&softc->lock); 1768 error = sbuf_printf(sb, "</ctlislist>\n"); 1769 if (error != 0) { 1770 sbuf_delete(sb); 1771 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE; 1772 snprintf(ci->error_str, sizeof(ci->error_str), 1773 "Out of space, %d bytes is too small", cilp->alloc_len); 1774 return; 1775 } 1776 sbuf_finish(sb); 1777 1778 error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1); 1779 if (error != 0) { 1780 sbuf_delete(sb); 1781 snprintf(ci->error_str, sizeof(ci->error_str), 1782 "copyout failed with error %d", error); 1783 ci->status = CTL_ISCSI_ERROR; 1784 return; 1785 } 1786 cilp->fill_len = sbuf_len(sb) + 1; 1787 ci->status = CTL_ISCSI_OK; 1788 sbuf_delete(sb); 1789 } 1790 1791 static void 1792 cfiscsi_ioctl_logout(struct ctl_iscsi *ci) 1793 { 1794 struct icl_pdu *response; 1795 struct iscsi_bhs_asynchronous_message *bhsam; 1796 struct ctl_iscsi_logout_params *cilp; 1797 struct cfiscsi_session *cs; 1798 struct cfiscsi_softc *softc; 1799 int found = 0; 1800 1801 cilp = (struct ctl_iscsi_logout_params *)&(ci->data); 1802 softc = &cfiscsi_softc; 1803 1804 mtx_lock(&softc->lock); 1805 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1806 if (cilp->all == 0 && cs->cs_id != cilp->connection_id && 1807 strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 && 1808 strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0) 1809 continue; 1810 1811 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1812 if (response == NULL) { 1813 ci->status = CTL_ISCSI_ERROR; 1814 snprintf(ci->error_str, sizeof(ci->error_str), 1815 "Unable to allocate memory"); 1816 mtx_unlock(&softc->lock); 1817 return; 1818 } 1819 bhsam = 1820 (struct iscsi_bhs_asynchronous_message *)response->ip_bhs; 1821 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1822 bhsam->bhsam_flags = 0x80; 1823 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT; 1824 bhsam->bhsam_parameter3 = htons(10); 1825 cfiscsi_pdu_queue(response); 1826 found++; 1827 } 1828 mtx_unlock(&softc->lock); 1829 1830 if (found == 0) { 1831 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1832 snprintf(ci->error_str, sizeof(ci->error_str), 1833 "No matching connections found"); 1834 return; 1835 } 1836 1837 ci->status = CTL_ISCSI_OK; 1838 } 1839 1840 static void 1841 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci) 1842 { 1843 struct icl_pdu *response; 1844 struct iscsi_bhs_asynchronous_message *bhsam; 1845 struct ctl_iscsi_terminate_params *citp; 1846 struct cfiscsi_session *cs; 1847 struct cfiscsi_softc *softc; 1848 int found = 0; 1849 1850 citp = (struct ctl_iscsi_terminate_params *)&(ci->data); 1851 softc = &cfiscsi_softc; 1852 1853 mtx_lock(&softc->lock); 1854 TAILQ_FOREACH(cs, &softc->sessions, cs_next) { 1855 if (citp->all == 0 && cs->cs_id != citp->connection_id && 1856 strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 && 1857 strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0) 1858 continue; 1859 1860 response = icl_pdu_new(cs->cs_conn, M_NOWAIT); 1861 if (response == NULL) { 1862 /* 1863 * Oh well. Just terminate the connection. 1864 */ 1865 } else { 1866 bhsam = (struct iscsi_bhs_asynchronous_message *) 1867 response->ip_bhs; 1868 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE; 1869 bhsam->bhsam_flags = 0x80; 1870 bhsam->bhsam_0xffffffff = 0xffffffff; 1871 bhsam->bhsam_async_event = 1872 BHSAM_EVENT_TARGET_TERMINATES_SESSION; 1873 cfiscsi_pdu_queue(response); 1874 } 1875 cfiscsi_session_terminate(cs); 1876 found++; 1877 } 1878 mtx_unlock(&softc->lock); 1879 1880 if (found == 0) { 1881 ci->status = CTL_ISCSI_SESSION_NOT_FOUND; 1882 snprintf(ci->error_str, sizeof(ci->error_str), 1883 "No matching connections found"); 1884 return; 1885 } 1886 1887 ci->status = CTL_ISCSI_OK; 1888 } 1889 1890 static void 1891 cfiscsi_ioctl_limits(struct ctl_iscsi *ci) 1892 { 1893 struct ctl_iscsi_limits_params *cilp; 1894 struct icl_drv_limits idl; 1895 int error; 1896 1897 cilp = (struct ctl_iscsi_limits_params *)&(ci->data); 1898 1899 error = icl_limits(cilp->offload, false, cilp->socket, &idl); 1900 if (error != 0) { 1901 ci->status = CTL_ISCSI_ERROR; 1902 snprintf(ci->error_str, sizeof(ci->error_str), 1903 "%s: icl_limits failed with error %d", 1904 __func__, error); 1905 return; 1906 } 1907 1908 cilp->max_recv_data_segment_length = 1909 idl.idl_max_recv_data_segment_length; 1910 cilp->max_send_data_segment_length = 1911 idl.idl_max_send_data_segment_length; 1912 cilp->max_burst_length = idl.idl_max_burst_length; 1913 cilp->first_burst_length = idl.idl_first_burst_length; 1914 1915 ci->status = CTL_ISCSI_OK; 1916 } 1917 1918 #ifdef ICL_KERNEL_PROXY 1919 static void 1920 cfiscsi_ioctl_listen(struct ctl_iscsi *ci) 1921 { 1922 struct ctl_iscsi_listen_params *cilp; 1923 struct sockaddr *sa; 1924 int error; 1925 1926 cilp = (struct ctl_iscsi_listen_params *)&(ci->data); 1927 1928 if (cfiscsi_softc.listener == NULL) { 1929 CFISCSI_DEBUG("no listener"); 1930 snprintf(ci->error_str, sizeof(ci->error_str), "no listener"); 1931 ci->status = CTL_ISCSI_ERROR; 1932 return; 1933 } 1934 1935 error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen); 1936 if (error != 0) { 1937 CFISCSI_DEBUG("getsockaddr, error %d", error); 1938 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed"); 1939 ci->status = CTL_ISCSI_ERROR; 1940 return; 1941 } 1942 1943 error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain, 1944 cilp->socktype, cilp->protocol, sa, cilp->portal_id); 1945 if (error != 0) { 1946 free(sa, M_SONAME); 1947 CFISCSI_DEBUG("icl_listen_add, error %d", error); 1948 snprintf(ci->error_str, sizeof(ci->error_str), 1949 "icl_listen_add failed, error %d", error); 1950 ci->status = CTL_ISCSI_ERROR; 1951 return; 1952 } 1953 1954 ci->status = CTL_ISCSI_OK; 1955 } 1956 1957 static void 1958 cfiscsi_ioctl_accept(struct ctl_iscsi *ci) 1959 { 1960 struct ctl_iscsi_accept_params *ciap; 1961 struct cfiscsi_session *cs; 1962 int error; 1963 1964 ciap = (struct ctl_iscsi_accept_params *)&(ci->data); 1965 1966 mtx_lock(&cfiscsi_softc.lock); 1967 for (;;) { 1968 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 1969 if (cs->cs_waiting_for_ctld) 1970 break; 1971 } 1972 if (cs != NULL) 1973 break; 1974 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock); 1975 if (error != 0) { 1976 mtx_unlock(&cfiscsi_softc.lock); 1977 snprintf(ci->error_str, sizeof(ci->error_str), "interrupted"); 1978 ci->status = CTL_ISCSI_ERROR; 1979 return; 1980 } 1981 } 1982 mtx_unlock(&cfiscsi_softc.lock); 1983 1984 cs->cs_waiting_for_ctld = false; 1985 cs->cs_login_phase = true; 1986 1987 ciap->connection_id = cs->cs_id; 1988 ciap->portal_id = cs->cs_portal_id; 1989 ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len; 1990 error = copyout(cs->cs_initiator_sa, ciap->initiator_addr, 1991 cs->cs_initiator_sa->sa_len); 1992 if (error != 0) { 1993 snprintf(ci->error_str, sizeof(ci->error_str), 1994 "copyout failed with error %d", error); 1995 ci->status = CTL_ISCSI_ERROR; 1996 return; 1997 } 1998 1999 ci->status = CTL_ISCSI_OK; 2000 } 2001 2002 static void 2003 cfiscsi_ioctl_send(struct ctl_iscsi *ci) 2004 { 2005 struct ctl_iscsi_send_params *cisp; 2006 struct cfiscsi_session *cs; 2007 struct icl_pdu *ip; 2008 size_t datalen; 2009 void *data; 2010 int error; 2011 2012 cisp = (struct ctl_iscsi_send_params *)&(ci->data); 2013 2014 mtx_lock(&cfiscsi_softc.lock); 2015 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2016 if (cs->cs_id == cisp->connection_id) 2017 break; 2018 } 2019 if (cs == NULL) { 2020 mtx_unlock(&cfiscsi_softc.lock); 2021 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found"); 2022 ci->status = CTL_ISCSI_ERROR; 2023 return; 2024 } 2025 mtx_unlock(&cfiscsi_softc.lock); 2026 2027 #if 0 2028 if (cs->cs_login_phase == false) 2029 return (EBUSY); 2030 #endif 2031 2032 if (cs->cs_terminating) { 2033 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating"); 2034 ci->status = CTL_ISCSI_ERROR; 2035 return; 2036 } 2037 2038 datalen = cisp->data_segment_len; 2039 /* 2040 * XXX 2041 */ 2042 //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) { 2043 if (datalen > 65535) { 2044 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big"); 2045 ci->status = CTL_ISCSI_ERROR; 2046 return; 2047 } 2048 if (datalen > 0) { 2049 data = malloc(datalen, M_CFISCSI, M_WAITOK); 2050 error = copyin(cisp->data_segment, data, datalen); 2051 if (error != 0) { 2052 free(data, M_CFISCSI); 2053 snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error); 2054 ci->status = CTL_ISCSI_ERROR; 2055 return; 2056 } 2057 } 2058 2059 ip = icl_pdu_new(cs->cs_conn, M_WAITOK); 2060 memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs)); 2061 if (datalen > 0) { 2062 icl_pdu_append_data(ip, data, datalen, M_WAITOK); 2063 free(data, M_CFISCSI); 2064 } 2065 CFISCSI_SESSION_LOCK(cs); 2066 icl_pdu_queue(ip); 2067 CFISCSI_SESSION_UNLOCK(cs); 2068 ci->status = CTL_ISCSI_OK; 2069 } 2070 2071 static void 2072 cfiscsi_ioctl_receive(struct ctl_iscsi *ci) 2073 { 2074 struct ctl_iscsi_receive_params *cirp; 2075 struct cfiscsi_session *cs; 2076 struct icl_pdu *ip; 2077 void *data; 2078 int error; 2079 2080 cirp = (struct ctl_iscsi_receive_params *)&(ci->data); 2081 2082 mtx_lock(&cfiscsi_softc.lock); 2083 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) { 2084 if (cs->cs_id == cirp->connection_id) 2085 break; 2086 } 2087 if (cs == NULL) { 2088 mtx_unlock(&cfiscsi_softc.lock); 2089 snprintf(ci->error_str, sizeof(ci->error_str), 2090 "connection not found"); 2091 ci->status = CTL_ISCSI_ERROR; 2092 return; 2093 } 2094 mtx_unlock(&cfiscsi_softc.lock); 2095 2096 #if 0 2097 if (is->is_login_phase == false) 2098 return (EBUSY); 2099 #endif 2100 2101 CFISCSI_SESSION_LOCK(cs); 2102 while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) { 2103 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock); 2104 if (error != 0) { 2105 CFISCSI_SESSION_UNLOCK(cs); 2106 snprintf(ci->error_str, sizeof(ci->error_str), 2107 "interrupted by signal"); 2108 ci->status = CTL_ISCSI_ERROR; 2109 return; 2110 } 2111 } 2112 2113 if (cs->cs_terminating) { 2114 CFISCSI_SESSION_UNLOCK(cs); 2115 snprintf(ci->error_str, sizeof(ci->error_str), 2116 "connection terminating"); 2117 ci->status = CTL_ISCSI_ERROR; 2118 return; 2119 } 2120 ip = cs->cs_login_pdu; 2121 cs->cs_login_pdu = NULL; 2122 CFISCSI_SESSION_UNLOCK(cs); 2123 2124 if (ip->ip_data_len > cirp->data_segment_len) { 2125 icl_pdu_free(ip); 2126 snprintf(ci->error_str, sizeof(ci->error_str), 2127 "data segment too big"); 2128 ci->status = CTL_ISCSI_ERROR; 2129 return; 2130 } 2131 2132 copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs)); 2133 if (ip->ip_data_len > 0) { 2134 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK); 2135 icl_pdu_get_data(ip, 0, data, ip->ip_data_len); 2136 copyout(data, cirp->data_segment, ip->ip_data_len); 2137 free(data, M_CFISCSI); 2138 } 2139 2140 icl_pdu_free(ip); 2141 ci->status = CTL_ISCSI_OK; 2142 } 2143 2144 #endif /* !ICL_KERNEL_PROXY */ 2145 2146 static void 2147 cfiscsi_ioctl_port_create(struct ctl_req *req) 2148 { 2149 struct cfiscsi_target *ct; 2150 struct ctl_port *port; 2151 const char *target, *alias, *val; 2152 struct scsi_vpd_id_descriptor *desc; 2153 int retval, len, idlen; 2154 uint16_t tag; 2155 2156 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2157 alias = dnvlist_get_string(req->args_nvl, "cfiscsi_target_alias", NULL); 2158 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2159 NULL); 2160 2161 if (target == NULL || val == NULL) { 2162 req->status = CTL_LUN_ERROR; 2163 snprintf(req->error_str, sizeof(req->error_str), 2164 "Missing required argument"); 2165 return; 2166 } 2167 2168 tag = strtoul(val, NULL, 0); 2169 ct = cfiscsi_target_find_or_create(&cfiscsi_softc, target, alias, tag); 2170 if (ct == NULL) { 2171 req->status = CTL_LUN_ERROR; 2172 snprintf(req->error_str, sizeof(req->error_str), 2173 "failed to create target \"%s\"", target); 2174 return; 2175 } 2176 if (ct->ct_state == CFISCSI_TARGET_STATE_ACTIVE) { 2177 req->status = CTL_LUN_ERROR; 2178 snprintf(req->error_str, sizeof(req->error_str), 2179 "target \"%s\" for portal group tag %u already exists", 2180 target, tag); 2181 cfiscsi_target_release(ct); 2182 return; 2183 } 2184 port = &ct->ct_port; 2185 // WAT 2186 if (ct->ct_state == CFISCSI_TARGET_STATE_DYING) 2187 goto done; 2188 2189 port->frontend = &cfiscsi_frontend; 2190 port->port_type = CTL_PORT_ISCSI; 2191 /* XXX KDM what should the real number be here? */ 2192 port->num_requested_ctl_io = 4096; 2193 port->port_name = "iscsi"; 2194 port->physical_port = (int)tag; 2195 port->virtual_port = ct->ct_target_id; 2196 port->port_online = cfiscsi_online; 2197 port->port_offline = cfiscsi_offline; 2198 port->port_info = cfiscsi_info; 2199 port->onoff_arg = ct; 2200 port->fe_datamove = cfiscsi_datamove; 2201 port->fe_done = cfiscsi_done; 2202 port->targ_port = -1; 2203 port->options = nvlist_clone(req->args_nvl); 2204 2205 /* Generate Port ID. */ 2206 idlen = strlen(target) + strlen(",t,0x0001") + 1; 2207 idlen = roundup2(idlen, 4); 2208 len = sizeof(struct scsi_vpd_device_id) + idlen; 2209 port->port_devid = malloc(sizeof(struct ctl_devid) + len, 2210 M_CTL, M_WAITOK | M_ZERO); 2211 port->port_devid->len = len; 2212 desc = (struct scsi_vpd_id_descriptor *)port->port_devid->data; 2213 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2214 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT | 2215 SVPD_ID_TYPE_SCSI_NAME; 2216 desc->length = idlen; 2217 snprintf(desc->identifier, idlen, "%s,t,0x%4.4x", target, tag); 2218 2219 /* Generate Target ID. */ 2220 idlen = strlen(target) + 1; 2221 idlen = roundup2(idlen, 4); 2222 len = sizeof(struct scsi_vpd_device_id) + idlen; 2223 port->target_devid = malloc(sizeof(struct ctl_devid) + len, 2224 M_CTL, M_WAITOK | M_ZERO); 2225 port->target_devid->len = len; 2226 desc = (struct scsi_vpd_id_descriptor *)port->target_devid->data; 2227 desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8; 2228 desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_TARGET | 2229 SVPD_ID_TYPE_SCSI_NAME; 2230 desc->length = idlen; 2231 strlcpy(desc->identifier, target, idlen); 2232 2233 retval = ctl_port_register(port); 2234 if (retval != 0) { 2235 free(port->port_devid, M_CFISCSI); 2236 free(port->target_devid, M_CFISCSI); 2237 cfiscsi_target_release(ct); 2238 req->status = CTL_LUN_ERROR; 2239 snprintf(req->error_str, sizeof(req->error_str), 2240 "ctl_port_register() failed with error %d", retval); 2241 return; 2242 } 2243 done: 2244 ct->ct_state = CFISCSI_TARGET_STATE_ACTIVE; 2245 req->status = CTL_LUN_OK; 2246 req->result_nvl = nvlist_create(0); 2247 nvlist_add_number(req->result_nvl, "port_id", port->targ_port); 2248 } 2249 2250 static void 2251 cfiscsi_ioctl_port_remove(struct ctl_req *req) 2252 { 2253 struct cfiscsi_target *ct; 2254 const char *target, *val; 2255 uint16_t tag; 2256 2257 target = dnvlist_get_string(req->args_nvl, "cfiscsi_target", NULL); 2258 val = dnvlist_get_string(req->args_nvl, "cfiscsi_portal_group_tag", 2259 NULL); 2260 2261 if (target == NULL || val == NULL) { 2262 req->status = CTL_LUN_ERROR; 2263 snprintf(req->error_str, sizeof(req->error_str), 2264 "Missing required argument"); 2265 return; 2266 } 2267 2268 tag = strtoul(val, NULL, 0); 2269 ct = cfiscsi_target_find(&cfiscsi_softc, target, tag); 2270 if (ct == NULL) { 2271 req->status = CTL_LUN_ERROR; 2272 snprintf(req->error_str, sizeof(req->error_str), 2273 "can't find target \"%s\"", target); 2274 return; 2275 } 2276 2277 ct->ct_state = CFISCSI_TARGET_STATE_DYING; 2278 ctl_port_offline(&ct->ct_port); 2279 cfiscsi_target_release(ct); 2280 cfiscsi_target_release(ct); 2281 req->status = CTL_LUN_OK; 2282 } 2283 2284 static int 2285 cfiscsi_ioctl(struct cdev *dev, 2286 u_long cmd, caddr_t addr, int flag, struct thread *td) 2287 { 2288 struct ctl_iscsi *ci; 2289 struct ctl_req *req; 2290 2291 if (cmd == CTL_PORT_REQ) { 2292 req = (struct ctl_req *)addr; 2293 switch (req->reqtype) { 2294 case CTL_REQ_CREATE: 2295 cfiscsi_ioctl_port_create(req); 2296 break; 2297 case CTL_REQ_REMOVE: 2298 cfiscsi_ioctl_port_remove(req); 2299 break; 2300 default: 2301 req->status = CTL_LUN_ERROR; 2302 snprintf(req->error_str, sizeof(req->error_str), 2303 "Unsupported request type %d", req->reqtype); 2304 } 2305 return (0); 2306 } 2307 2308 if (cmd != CTL_ISCSI) 2309 return (ENOTTY); 2310 2311 ci = (struct ctl_iscsi *)addr; 2312 switch (ci->type) { 2313 case CTL_ISCSI_HANDOFF: 2314 cfiscsi_ioctl_handoff(ci); 2315 break; 2316 case CTL_ISCSI_LIST: 2317 cfiscsi_ioctl_list(ci); 2318 break; 2319 case CTL_ISCSI_LOGOUT: 2320 cfiscsi_ioctl_logout(ci); 2321 break; 2322 case CTL_ISCSI_TERMINATE: 2323 cfiscsi_ioctl_terminate(ci); 2324 break; 2325 case CTL_ISCSI_LIMITS: 2326 cfiscsi_ioctl_limits(ci); 2327 break; 2328 #ifdef ICL_KERNEL_PROXY 2329 case CTL_ISCSI_LISTEN: 2330 cfiscsi_ioctl_listen(ci); 2331 break; 2332 case CTL_ISCSI_ACCEPT: 2333 cfiscsi_ioctl_accept(ci); 2334 break; 2335 case CTL_ISCSI_SEND: 2336 cfiscsi_ioctl_send(ci); 2337 break; 2338 case CTL_ISCSI_RECEIVE: 2339 cfiscsi_ioctl_receive(ci); 2340 break; 2341 #else 2342 case CTL_ISCSI_LISTEN: 2343 case CTL_ISCSI_ACCEPT: 2344 case CTL_ISCSI_SEND: 2345 case CTL_ISCSI_RECEIVE: 2346 ci->status = CTL_ISCSI_ERROR; 2347 snprintf(ci->error_str, sizeof(ci->error_str), 2348 "%s: CTL compiled without ICL_KERNEL_PROXY", 2349 __func__); 2350 break; 2351 #endif /* !ICL_KERNEL_PROXY */ 2352 default: 2353 ci->status = CTL_ISCSI_ERROR; 2354 snprintf(ci->error_str, sizeof(ci->error_str), 2355 "%s: invalid iSCSI request type %d", __func__, ci->type); 2356 break; 2357 } 2358 2359 return (0); 2360 } 2361 2362 static void 2363 cfiscsi_target_hold(struct cfiscsi_target *ct) 2364 { 2365 2366 refcount_acquire(&ct->ct_refcount); 2367 } 2368 2369 static void 2370 cfiscsi_target_release(struct cfiscsi_target *ct) 2371 { 2372 struct cfiscsi_softc *softc; 2373 2374 softc = ct->ct_softc; 2375 mtx_lock(&softc->lock); 2376 if (refcount_release(&ct->ct_refcount)) { 2377 TAILQ_REMOVE(&softc->targets, ct, ct_next); 2378 mtx_unlock(&softc->lock); 2379 if (ct->ct_state != CFISCSI_TARGET_STATE_INVALID) { 2380 ct->ct_state = CFISCSI_TARGET_STATE_INVALID; 2381 if (ctl_port_deregister(&ct->ct_port) != 0) 2382 printf("%s: ctl_port_deregister() failed\n", 2383 __func__); 2384 } 2385 free(ct, M_CFISCSI); 2386 2387 return; 2388 } 2389 mtx_unlock(&softc->lock); 2390 } 2391 2392 static struct cfiscsi_target * 2393 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name, uint16_t tag) 2394 { 2395 struct cfiscsi_target *ct; 2396 2397 mtx_lock(&softc->lock); 2398 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2399 if (ct->ct_tag != tag || 2400 strcmp(name, ct->ct_name) != 0 || 2401 ct->ct_state != CFISCSI_TARGET_STATE_ACTIVE) 2402 continue; 2403 cfiscsi_target_hold(ct); 2404 mtx_unlock(&softc->lock); 2405 return (ct); 2406 } 2407 mtx_unlock(&softc->lock); 2408 2409 return (NULL); 2410 } 2411 2412 static struct cfiscsi_target * 2413 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name, 2414 const char *alias, uint16_t tag) 2415 { 2416 struct cfiscsi_target *ct, *newct; 2417 2418 if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN) 2419 return (NULL); 2420 2421 newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO); 2422 2423 mtx_lock(&softc->lock); 2424 TAILQ_FOREACH(ct, &softc->targets, ct_next) { 2425 if (ct->ct_tag != tag || 2426 strcmp(name, ct->ct_name) != 0 || 2427 ct->ct_state == CFISCSI_TARGET_STATE_INVALID) 2428 continue; 2429 cfiscsi_target_hold(ct); 2430 mtx_unlock(&softc->lock); 2431 free(newct, M_CFISCSI); 2432 return (ct); 2433 } 2434 2435 strlcpy(newct->ct_name, name, sizeof(newct->ct_name)); 2436 if (alias != NULL) 2437 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias)); 2438 newct->ct_tag = tag; 2439 refcount_init(&newct->ct_refcount, 1); 2440 newct->ct_softc = softc; 2441 if (TAILQ_EMPTY(&softc->targets)) 2442 softc->last_target_id = 0; 2443 newct->ct_target_id = ++softc->last_target_id; 2444 TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next); 2445 mtx_unlock(&softc->lock); 2446 2447 return (newct); 2448 } 2449 2450 static void 2451 cfiscsi_pdu_done(struct icl_pdu *ip, int error) 2452 { 2453 2454 if (error != 0) 2455 ; // XXX: Do something on error? 2456 ((ctl_ref)ip->ip_prv0)(ip->ip_prv1, -1); 2457 } 2458 2459 static void 2460 cfiscsi_datamove_in(union ctl_io *io) 2461 { 2462 struct cfiscsi_session *cs; 2463 struct icl_pdu *request, *response; 2464 const struct iscsi_bhs_scsi_command *bhssc; 2465 struct iscsi_bhs_data_in *bhsdi; 2466 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2467 size_t len, expected_len, sg_len, buffer_offset; 2468 size_t max_send_data_segment_length; 2469 const char *sg_addr; 2470 icl_pdu_cb cb; 2471 int ctl_sg_count, error, i; 2472 2473 request = PRIV_REQUEST(io); 2474 cs = PDU_SESSION(request); 2475 2476 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2477 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2478 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2479 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2480 2481 if (io->scsiio.kern_sg_entries > 0) { 2482 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2483 ctl_sg_count = io->scsiio.kern_sg_entries; 2484 } else { 2485 ctl_sglist = &ctl_sg_entry; 2486 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2487 ctl_sglist->len = io->scsiio.kern_data_len; 2488 ctl_sg_count = 1; 2489 } 2490 2491 /* 2492 * This is the offset within the current SCSI command; for the first 2493 * call to cfiscsi_datamove() it will be 0, and for subsequent ones 2494 * it will be the sum of lengths of previous ones. 2495 */ 2496 buffer_offset = io->scsiio.kern_rel_offset; 2497 2498 /* 2499 * This is the transfer length expected by the initiator. It can be 2500 * different from the amount of data from the SCSI point of view. 2501 */ 2502 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2503 2504 /* 2505 * If the transfer is outside of expected length -- we are done. 2506 */ 2507 if (buffer_offset >= expected_len) { 2508 #if 0 2509 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, " 2510 "already sent the expected len", buffer_offset); 2511 #endif 2512 ctl_datamove_done(io, true); 2513 return; 2514 } 2515 2516 if (io->scsiio.kern_data_ref != NULL) 2517 cb = cfiscsi_pdu_done; 2518 else 2519 cb = NULL; 2520 2521 i = 0; 2522 sg_addr = NULL; 2523 sg_len = 0; 2524 response = NULL; 2525 bhsdi = NULL; 2526 if (cs->cs_conn->ic_hw_isomax != 0) 2527 max_send_data_segment_length = cs->cs_conn->ic_hw_isomax; 2528 else 2529 max_send_data_segment_length = 2530 cs->cs_conn->ic_max_send_data_segment_length; 2531 for (;;) { 2532 if (response == NULL) { 2533 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2534 if (response == NULL) { 2535 CFISCSI_SESSION_WARN(cs, "failed to " 2536 "allocate memory; dropping connection"); 2537 ctl_set_busy(&io->scsiio); 2538 ctl_datamove_done(io, true); 2539 cfiscsi_session_terminate(cs); 2540 return; 2541 } 2542 bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs; 2543 bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN; 2544 bhsdi->bhsdi_initiator_task_tag = 2545 bhssc->bhssc_initiator_task_tag; 2546 bhsdi->bhsdi_target_transfer_tag = 0xffffffff; 2547 bhsdi->bhsdi_datasn = htonl(PRIV_EXPDATASN(io)); 2548 bhsdi->bhsdi_buffer_offset = htonl(buffer_offset); 2549 } 2550 2551 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count")); 2552 if (sg_len == 0) { 2553 sg_addr = ctl_sglist[i].addr; 2554 sg_len = ctl_sglist[i].len; 2555 KASSERT(sg_len > 0, ("sg_len <= 0")); 2556 } 2557 2558 len = sg_len; 2559 2560 /* 2561 * Truncate to maximum data segment length. 2562 */ 2563 KASSERT(response->ip_data_len < max_send_data_segment_length, 2564 ("ip_data_len %zd >= max_send_data_segment_length %zd", 2565 response->ip_data_len, max_send_data_segment_length)); 2566 if (response->ip_data_len + len > max_send_data_segment_length) { 2567 len = max_send_data_segment_length - response->ip_data_len; 2568 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2569 len, sg_len)); 2570 } 2571 2572 /* 2573 * Truncate to expected data transfer length. 2574 */ 2575 KASSERT(buffer_offset + response->ip_data_len < expected_len, 2576 ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd", 2577 buffer_offset, response->ip_data_len, expected_len)); 2578 if (buffer_offset + response->ip_data_len + len > expected_len) { 2579 CFISCSI_SESSION_DEBUG(cs, "truncating from %zd " 2580 "to expected data transfer length %zd", 2581 buffer_offset + response->ip_data_len + len, expected_len); 2582 len = expected_len - (buffer_offset + response->ip_data_len); 2583 KASSERT(len <= sg_len, ("len %zd > sg_len %zd", 2584 len, sg_len)); 2585 } 2586 2587 error = icl_pdu_append_data(response, sg_addr, len, 2588 M_NOWAIT | (cb ? ICL_NOCOPY : 0)); 2589 if (error != 0) { 2590 CFISCSI_SESSION_WARN(cs, "failed to " 2591 "allocate memory; dropping connection"); 2592 icl_pdu_free(response); 2593 ctl_set_busy(&io->scsiio); 2594 ctl_datamove_done(io, true); 2595 cfiscsi_session_terminate(cs); 2596 return; 2597 } 2598 sg_addr += len; 2599 sg_len -= len; 2600 io->scsiio.kern_data_resid -= len; 2601 2602 KASSERT(buffer_offset + response->ip_data_len <= expected_len, 2603 ("buffer_offset %zd + ip_data_len %zd > expected_len %zd", 2604 buffer_offset, response->ip_data_len, expected_len)); 2605 if (buffer_offset + response->ip_data_len == expected_len) { 2606 /* 2607 * Already have the amount of data the initiator wanted. 2608 */ 2609 break; 2610 } 2611 2612 if (sg_len == 0) { 2613 /* 2614 * End of scatter-gather segment; 2615 * proceed to the next one... 2616 */ 2617 if (i == ctl_sg_count - 1) { 2618 /* 2619 * ... unless this was the last one. 2620 */ 2621 break; 2622 } 2623 i++; 2624 } 2625 2626 if (response->ip_data_len == max_send_data_segment_length) { 2627 /* 2628 * Can't stuff more data into the current PDU; 2629 * queue it. Note that's not enough to check 2630 * for kern_data_resid == 0 instead; there 2631 * may be several Data-In PDUs for the final 2632 * call to cfiscsi_datamove(), and we want 2633 * to set the F flag only on the last of them. 2634 */ 2635 buffer_offset += response->ip_data_len; 2636 if (buffer_offset == io->scsiio.kern_total_len || 2637 buffer_offset == expected_len) { 2638 buffer_offset -= response->ip_data_len; 2639 break; 2640 } 2641 PRIV_EXPDATASN(io) += howmany(response->ip_data_len, 2642 cs->cs_conn->ic_max_send_data_segment_length); 2643 if (cb != NULL) { 2644 response->ip_prv0 = io->scsiio.kern_data_ref; 2645 response->ip_prv1 = io->scsiio.kern_data_arg; 2646 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2647 } 2648 cfiscsi_pdu_queue_cb(response, cb); 2649 response = NULL; 2650 bhsdi = NULL; 2651 } 2652 } 2653 if (response != NULL) { 2654 buffer_offset += response->ip_data_len; 2655 if (buffer_offset == io->scsiio.kern_total_len || 2656 buffer_offset == expected_len) { 2657 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F; 2658 if (io->io_hdr.status == CTL_SUCCESS) { 2659 bhsdi->bhsdi_flags |= BHSDI_FLAGS_S; 2660 if (io->scsiio.kern_total_len < 2661 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2662 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2663 bhsdi->bhsdi_residual_count = 2664 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2665 io->scsiio.kern_total_len); 2666 } else if (io->scsiio.kern_total_len > 2667 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2668 bhsdi->bhsdi_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2669 bhsdi->bhsdi_residual_count = 2670 htonl(io->scsiio.kern_total_len - 2671 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2672 } 2673 bhsdi->bhsdi_status = io->scsiio.scsi_status; 2674 io->io_hdr.flags |= CTL_FLAG_STATUS_SENT; 2675 } 2676 } 2677 KASSERT(response->ip_data_len > 0, ("sending empty Data-In")); 2678 PRIV_EXPDATASN(io) += howmany(response->ip_data_len, 2679 cs->cs_conn->ic_max_send_data_segment_length); 2680 if (cb != NULL) { 2681 response->ip_prv0 = io->scsiio.kern_data_ref; 2682 response->ip_prv1 = io->scsiio.kern_data_arg; 2683 io->scsiio.kern_data_ref(io->scsiio.kern_data_arg, 1); 2684 } 2685 cfiscsi_pdu_queue_cb(response, cb); 2686 } 2687 2688 ctl_datamove_done(io, true); 2689 } 2690 2691 static void 2692 cfiscsi_datamove_out(union ctl_io *io) 2693 { 2694 struct cfiscsi_session *cs; 2695 struct icl_pdu *request, *response; 2696 const struct iscsi_bhs_scsi_command *bhssc; 2697 struct iscsi_bhs_r2t *bhsr2t; 2698 struct cfiscsi_data_wait *cdw; 2699 struct ctl_sg_entry ctl_sg_entry, *ctl_sglist; 2700 uint32_t expected_len, datamove_len, r2t_off, r2t_len; 2701 uint32_t target_transfer_tag; 2702 bool done; 2703 2704 request = PRIV_REQUEST(io); 2705 cs = PDU_SESSION(request); 2706 2707 bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs; 2708 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2709 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2710 ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND")); 2711 2712 /* 2713 * Complete write underflow. Not a single byte to read. Return. 2714 */ 2715 expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length); 2716 if (io->scsiio.kern_rel_offset >= expected_len) { 2717 ctl_datamove_done(io, true); 2718 return; 2719 } 2720 2721 datamove_len = MIN(io->scsiio.kern_data_len, 2722 expected_len - io->scsiio.kern_rel_offset); 2723 2724 target_transfer_tag = 2725 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2726 if (target_transfer_tag == 0xffffffff) { 2727 target_transfer_tag = 2728 atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1); 2729 } 2730 cdw = cfiscsi_data_wait_new(cs, io, bhssc->bhssc_initiator_task_tag, 2731 &target_transfer_tag); 2732 if (cdw == NULL) { 2733 CFISCSI_SESSION_WARN(cs, "failed to " 2734 "allocate memory; dropping connection"); 2735 ctl_set_busy(&io->scsiio); 2736 ctl_datamove_done(io, true); 2737 cfiscsi_session_terminate(cs); 2738 return; 2739 } 2740 #if 0 2741 CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator " 2742 "task tag 0x%x, target transfer tag 0x%x", 2743 bhssc->bhssc_initiator_task_tag, target_transfer_tag); 2744 #endif 2745 2746 cdw->cdw_ctl_io = io; 2747 cdw->cdw_target_transfer_tag = target_transfer_tag; 2748 cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2749 cdw->cdw_r2t_end = datamove_len; 2750 cdw->cdw_datasn = 0; 2751 2752 /* Set initial data pointer for the CDW respecting ext_data_filled. */ 2753 if (io->scsiio.kern_sg_entries > 0) { 2754 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 2755 } else { 2756 ctl_sglist = &ctl_sg_entry; 2757 ctl_sglist->addr = io->scsiio.kern_data_ptr; 2758 ctl_sglist->len = datamove_len; 2759 } 2760 cdw->cdw_sg_index = 0; 2761 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2762 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2763 r2t_off = io->scsiio.ext_data_filled; 2764 while (r2t_off > 0) { 2765 if (r2t_off >= cdw->cdw_sg_len) { 2766 r2t_off -= cdw->cdw_sg_len; 2767 cdw->cdw_sg_index++; 2768 cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr; 2769 cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len; 2770 continue; 2771 } 2772 cdw->cdw_sg_addr += r2t_off; 2773 cdw->cdw_sg_len -= r2t_off; 2774 r2t_off = 0; 2775 } 2776 2777 if (cs->cs_immediate_data && 2778 io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled < 2779 icl_pdu_data_segment_length(request)) { 2780 done = cfiscsi_handle_data_segment(request, cdw); 2781 if (done) { 2782 cfiscsi_data_wait_free(cs, cdw); 2783 ctl_datamove_done(io, true); 2784 return; 2785 } 2786 } 2787 2788 r2t_off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled; 2789 r2t_len = MIN(datamove_len - io->scsiio.ext_data_filled, 2790 cs->cs_max_burst_length); 2791 cdw->cdw_r2t_end = io->scsiio.ext_data_filled + r2t_len; 2792 2793 CFISCSI_SESSION_LOCK(cs); 2794 if (cs->cs_terminating_tasks) { 2795 CFISCSI_SESSION_UNLOCK(cs); 2796 KASSERT((io->io_hdr.flags & CTL_FLAG_ABORT) != 0, 2797 ("%s: I/O request %p on termating session %p not aborted", 2798 __func__, io, cs)); 2799 CFISCSI_SESSION_WARN(cs, "aborting data_wait for aborted I/O"); 2800 cfiscsi_data_wait_abort(cs, cdw, 44); 2801 return; 2802 } 2803 TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next); 2804 CFISCSI_SESSION_UNLOCK(cs); 2805 2806 /* 2807 * XXX: We should limit the number of outstanding R2T PDUs 2808 * per task to MaxOutstandingR2T. 2809 */ 2810 response = cfiscsi_pdu_new_response(request, M_NOWAIT); 2811 if (response == NULL) { 2812 CFISCSI_SESSION_WARN(cs, "failed to " 2813 "allocate memory; dropping connection"); 2814 ctl_set_busy(&io->scsiio); 2815 ctl_datamove_done(io, true); 2816 cfiscsi_session_terminate(cs); 2817 return; 2818 } 2819 io->io_hdr.flags |= CTL_FLAG_DMA_INPROG; 2820 bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs; 2821 bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T; 2822 bhsr2t->bhsr2t_flags = 0x80; 2823 bhsr2t->bhsr2t_lun = bhssc->bhssc_lun; 2824 bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2825 bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag; 2826 /* 2827 * XXX: Here we assume that cfiscsi_datamove() won't ever 2828 * be running concurrently on several CPUs for a given 2829 * command. 2830 */ 2831 bhsr2t->bhsr2t_r2tsn = htonl(PRIV_R2TSN(io)++); 2832 /* 2833 * This is the offset within the current SCSI command; 2834 * i.e. for the first call of datamove(), it will be 0, 2835 * and for subsequent ones it will be the sum of lengths 2836 * of previous ones. 2837 * 2838 * The ext_data_filled is to account for unsolicited 2839 * (immediate) data that might have already arrived. 2840 */ 2841 bhsr2t->bhsr2t_buffer_offset = htonl(r2t_off); 2842 /* 2843 * This is the total length (sum of S/G lengths) this call 2844 * to cfiscsi_datamove() is supposed to handle, limited by 2845 * MaxBurstLength. 2846 */ 2847 bhsr2t->bhsr2t_desired_data_transfer_length = htonl(r2t_len); 2848 cfiscsi_pdu_queue(response); 2849 } 2850 2851 static void 2852 cfiscsi_datamove(union ctl_io *io) 2853 { 2854 2855 if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) 2856 cfiscsi_datamove_in(io); 2857 else { 2858 /* We hadn't received anything during this datamove yet. */ 2859 io->scsiio.ext_data_filled = 0; 2860 cfiscsi_datamove_out(io); 2861 } 2862 } 2863 2864 static void 2865 cfiscsi_scsi_command_done(union ctl_io *io) 2866 { 2867 struct icl_pdu *request, *response; 2868 struct iscsi_bhs_scsi_command *bhssc; 2869 struct iscsi_bhs_scsi_response *bhssr; 2870 #ifdef DIAGNOSTIC 2871 struct cfiscsi_data_wait *cdw; 2872 struct cfiscsi_session *cs; 2873 #endif 2874 uint16_t sense_length; 2875 2876 request = PRIV_REQUEST(io); 2877 bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs; 2878 KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2879 ISCSI_BHS_OPCODE_SCSI_COMMAND, 2880 ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode)); 2881 2882 //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x", 2883 // bhssc->bhssc_initiator_task_tag); 2884 2885 #ifdef DIAGNOSTIC 2886 cs = PDU_SESSION(request); 2887 CFISCSI_SESSION_LOCK(cs); 2888 TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) 2889 KASSERT(bhssc->bhssc_initiator_task_tag != 2890 cdw->cdw_initiator_task_tag, ("dangling cdw")); 2891 CFISCSI_SESSION_UNLOCK(cs); 2892 #endif 2893 2894 /* 2895 * Do not return status for aborted commands. 2896 * There are exceptions, but none supported by CTL yet. 2897 */ 2898 if (((io->io_hdr.flags & CTL_FLAG_ABORT) && 2899 (io->io_hdr.flags & CTL_FLAG_ABORT_STATUS) == 0) || 2900 (io->io_hdr.flags & CTL_FLAG_STATUS_SENT)) { 2901 ctl_free_io(io); 2902 icl_pdu_free(request); 2903 return; 2904 } 2905 2906 response = cfiscsi_pdu_new_response(request, M_WAITOK); 2907 bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs; 2908 bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE; 2909 bhssr->bhssr_flags = 0x80; 2910 /* 2911 * XXX: We don't deal with bidirectional under/overflows; 2912 * does anything actually support those? 2913 */ 2914 if (io->scsiio.kern_total_len < 2915 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2916 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW; 2917 bhssr->bhssr_residual_count = 2918 htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) - 2919 io->scsiio.kern_total_len); 2920 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d", 2921 // ntohl(bhssr->bhssr_residual_count)); 2922 } else if (io->scsiio.kern_total_len > 2923 ntohl(bhssc->bhssc_expected_data_transfer_length)) { 2924 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW; 2925 bhssr->bhssr_residual_count = htonl(io->scsiio.kern_total_len - 2926 ntohl(bhssc->bhssc_expected_data_transfer_length)); 2927 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d", 2928 // ntohl(bhssr->bhssr_residual_count)); 2929 } 2930 bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED; 2931 bhssr->bhssr_status = io->scsiio.scsi_status; 2932 bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag; 2933 bhssr->bhssr_expdatasn = htonl(PRIV_EXPDATASN(io)); 2934 2935 if (io->scsiio.sense_len > 0) { 2936 #if 0 2937 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data", 2938 io->scsiio.sense_len); 2939 #endif 2940 sense_length = htons(io->scsiio.sense_len); 2941 icl_pdu_append_data(response, 2942 &sense_length, sizeof(sense_length), M_WAITOK); 2943 icl_pdu_append_data(response, 2944 &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK); 2945 } 2946 2947 ctl_free_io(io); 2948 icl_pdu_free(request); 2949 cfiscsi_pdu_queue(response); 2950 } 2951 2952 static void 2953 cfiscsi_task_management_done(union ctl_io *io) 2954 { 2955 struct icl_pdu *request, *response; 2956 struct iscsi_bhs_task_management_request *bhstmr; 2957 struct iscsi_bhs_task_management_response *bhstmr2; 2958 struct cfiscsi_data_wait *cdw, *tmpcdw; 2959 struct cfiscsi_session *cs, *tcs; 2960 struct cfiscsi_softc *softc; 2961 int cold_reset = 0; 2962 2963 request = PRIV_REQUEST(io); 2964 cs = PDU_SESSION(request); 2965 bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs; 2966 KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) == 2967 ISCSI_BHS_OPCODE_TASK_REQUEST, 2968 ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode)); 2969 2970 #if 0 2971 CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x", 2972 bhstmr->bhstmr_initiator_task_tag, 2973 bhstmr->bhstmr_referenced_task_tag); 2974 #endif 2975 2976 if ((bhstmr->bhstmr_function & ~0x80) == 2977 BHSTMR_FUNCTION_ABORT_TASK) { 2978 /* 2979 * Make sure we no longer wait for Data-Out for this command. 2980 */ 2981 CFISCSI_SESSION_LOCK(cs); 2982 TAILQ_FOREACH_SAFE(cdw, 2983 &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) { 2984 if (bhstmr->bhstmr_referenced_task_tag != 2985 cdw->cdw_initiator_task_tag) 2986 continue; 2987 2988 #if 0 2989 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task " 2990 "tag 0x%x", bhstmr->bhstmr_initiator_task_tag); 2991 #endif 2992 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, 2993 cdw, cdw_next); 2994 cfiscsi_data_wait_abort(cs, cdw, 43); 2995 } 2996 CFISCSI_SESSION_UNLOCK(cs); 2997 } 2998 if ((bhstmr->bhstmr_function & ~0x80) == 2999 BHSTMR_FUNCTION_TARGET_COLD_RESET && 3000 io->io_hdr.status == CTL_SUCCESS) 3001 cold_reset = 1; 3002 3003 response = cfiscsi_pdu_new_response(request, M_WAITOK); 3004 bhstmr2 = (struct iscsi_bhs_task_management_response *) 3005 response->ip_bhs; 3006 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE; 3007 bhstmr2->bhstmr_flags = 0x80; 3008 switch (io->taskio.task_status) { 3009 case CTL_TASK_FUNCTION_COMPLETE: 3010 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE; 3011 break; 3012 case CTL_TASK_FUNCTION_SUCCEEDED: 3013 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_SUCCEEDED; 3014 break; 3015 case CTL_TASK_LUN_DOES_NOT_EXIST: 3016 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_LUN_DOES_NOT_EXIST; 3017 break; 3018 case CTL_TASK_FUNCTION_NOT_SUPPORTED: 3019 default: 3020 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED; 3021 break; 3022 } 3023 memcpy(bhstmr2->bhstmr_additional_reponse_information, 3024 io->taskio.task_resp, sizeof(io->taskio.task_resp)); 3025 bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag; 3026 3027 ctl_free_io(io); 3028 icl_pdu_free(request); 3029 cfiscsi_pdu_queue(response); 3030 3031 if (cold_reset) { 3032 softc = cs->cs_target->ct_softc; 3033 mtx_lock(&softc->lock); 3034 TAILQ_FOREACH(tcs, &softc->sessions, cs_next) { 3035 if (tcs->cs_target == cs->cs_target) 3036 cfiscsi_session_terminate(tcs); 3037 } 3038 mtx_unlock(&softc->lock); 3039 } 3040 } 3041 3042 static void 3043 cfiscsi_done(union ctl_io *io) 3044 { 3045 struct icl_pdu *request; 3046 struct cfiscsi_session *cs; 3047 3048 KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE), 3049 ("invalid CTL status %#x", io->io_hdr.status)); 3050 3051 request = PRIV_REQUEST(io); 3052 cs = PDU_SESSION(request); 3053 3054 switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) { 3055 case ISCSI_BHS_OPCODE_SCSI_COMMAND: 3056 cfiscsi_scsi_command_done(io); 3057 break; 3058 case ISCSI_BHS_OPCODE_TASK_REQUEST: 3059 cfiscsi_task_management_done(io); 3060 break; 3061 case ISCSI_BHS_OPCODE_INTERNAL: 3062 /* 3063 * Implicit task termination has just completed; nothing to do. 3064 */ 3065 icl_pdu_free(request); 3066 cs->cs_tasks_aborted = true; 3067 refcount_release(&cs->cs_outstanding_ctl_pdus); 3068 wakeup(__DEVOLATILE(void *, &cs->cs_outstanding_ctl_pdus)); 3069 ctl_free_io(io); 3070 return; 3071 default: 3072 panic("cfiscsi_done called with wrong opcode 0x%x", 3073 request->ip_bhs->bhs_opcode); 3074 } 3075 3076 refcount_release(&cs->cs_outstanding_ctl_pdus); 3077 }
Cache object: df589a4e5598d0bb84b989cf0a673178
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