sys/cam/ctl/ctl_frontend_iscsi.c

   1 /*-
   2  * Copyright (c) 2012 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Edward Tomasz Napierala under sponsorship
   6  * from the FreeBSD Foundation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD$
  30  */
  31
  32 /*
  33  * CTL frontend for the iSCSI protocol.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 __FBSDID("$FreeBSD$");
  38
  39 #include <sys/param.h>
  40 #include <sys/capability.h>
  41 #include <sys/condvar.h>
  42 #include <sys/file.h>
  43 #include <sys/kernel.h>
  44 #include <sys/kthread.h>
  45 #include <sys/lock.h>
  46 #include <sys/malloc.h>
  47 #include <sys/module.h>
  48 #include <sys/mutex.h>
  49 #include <sys/queue.h>
  50 #include <sys/sbuf.h>
  51 #include <sys/sysctl.h>
  52 #include <sys/systm.h>
  53 #include <sys/uio.h>
  54 #include <sys/unistd.h>
  55 #include <vm/uma.h>
  56
  57 #include <cam/scsi/scsi_all.h>
  58 #include <cam/scsi/scsi_da.h>
  59 #include <cam/ctl/ctl_io.h>
  60 #include <cam/ctl/ctl.h>
  61 #include <cam/ctl/ctl_backend.h>
  62 #include <cam/ctl/ctl_error.h>
  63 #include <cam/ctl/ctl_frontend.h>
  64 #include <cam/ctl/ctl_frontend_internal.h>
  65 #include <cam/ctl/ctl_debug.h>
  66 #include <cam/ctl/ctl_ha.h>
  67 #include <cam/ctl/ctl_ioctl.h>
  68 #include <cam/ctl/ctl_private.h>
  69
  70 #include "../../dev/iscsi/icl.h"
  71 #include "../../dev/iscsi/iscsi_proto.h"
  72 #include "ctl_frontend_iscsi.h"
  73
  74 #ifdef ICL_KERNEL_PROXY
  75 #include <sys/socketvar.h>
  76 #endif
  77
  78 #ifdef ICL_KERNEL_PROXY
  79 FEATURE(cfiscsi_kernel_proxy, "iSCSI target built with ICL_KERNEL_PROXY");
  80 #endif
  81
  82 static MALLOC_DEFINE(M_CFISCSI, "cfiscsi", "Memory used for CTL iSCSI frontend");
  83 static uma_zone_t cfiscsi_data_wait_zone;
  84
  85 SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, iscsi, CTLFLAG_RD, 0,
  86     "CAM Target Layer iSCSI Frontend");
  87 static int debug = 3;
  88 TUNABLE_INT("kern.cam.ctl.iscsi.debug", &debug);
  89 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, debug, CTLFLAG_RWTUN,
  90     &debug, 1, "Enable debug messages");
  91 static int ping_timeout = 5;
  92 TUNABLE_INT("kern.cam.ctl.iscsi.ping_timeout", &ping_timeout);
  93 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, ping_timeout, CTLFLAG_RWTUN,
  94     &ping_timeout, 5, "Interval between ping (NOP-Out) requests, in seconds");
  95 static int login_timeout = 60;
  96 TUNABLE_INT("kern.cam.ctl.iscsi.login_timeout", &login_timeout);
  97 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, login_timeout, CTLFLAG_RWTUN,
  98     &login_timeout, 60, "Time to wait for ctld(8) to finish Login Phase, in seconds");
  99 static int maxcmdsn_delta = 256;
 100 TUNABLE_INT("kern.cam.ctl.iscsi.maxcmdsn_delta", &maxcmdsn_delta);
 101 SYSCTL_INT(_kern_cam_ctl_iscsi, OID_AUTO, maxcmdsn_delta, CTLFLAG_RWTUN,
 102     &maxcmdsn_delta, 256, "Number of commands the initiator can send "
 103     "without confirmation");
 104
 105 #define CFISCSI_DEBUG(X, ...)                                           \
 106         do {                                                            \
 107                 if (debug > 1) {                                        \
 108                         printf("%s: " X "\n",                           \
 109                             __func__, ## __VA_ARGS__);                  \
 110                 }                                                       \
 111         } while (0)
 112
 113 #define CFISCSI_WARN(X, ...)                                            \
 114         do {                                                            \
 115                 if (debug > 0) {                                        \
 116                         printf("WARNING: %s: " X "\n",                  \
 117                             __func__, ## __VA_ARGS__);                  \
 118                 }                                                       \
 119         } while (0)
 120
 121 #define CFISCSI_SESSION_DEBUG(S, X, ...)                                \
 122         do {                                                            \
 123                 if (debug > 1) {                                        \
 124                         printf("%s: %s (%s): " X "\n",                  \
 125                             __func__, S->cs_initiator_addr,             \
 126                             S->cs_initiator_name, ## __VA_ARGS__);      \
 127                 }                                                       \
 128         } while (0)
 129
 130 #define CFISCSI_SESSION_WARN(S, X, ...)                                 \
 131         do  {                                                           \
 132                 if (debug > 0) {                                        \
 133                         printf("WARNING: %s (%s): " X "\n",             \
 134                             S->cs_initiator_addr,                       \
 135                             S->cs_initiator_name, ## __VA_ARGS__);      \
 136                 }                                                       \
 137         } while (0)
 138
 139 #define CFISCSI_SESSION_LOCK(X)         mtx_lock(&X->cs_lock)
 140 #define CFISCSI_SESSION_UNLOCK(X)       mtx_unlock(&X->cs_lock)
 141 #define CFISCSI_SESSION_LOCK_ASSERT(X)  mtx_assert(&X->cs_lock, MA_OWNED)
 142
 143 #define CONN_SESSION(X)                 ((struct cfiscsi_session *)(X)->ic_prv0)
 144 #define PDU_SESSION(X)                  CONN_SESSION((X)->ip_conn)
 145 #define PDU_EXPDATASN(X)                (X)->ip_prv0
 146 #define PDU_TOTAL_TRANSFER_LEN(X)       (X)->ip_prv1
 147 #define PDU_R2TSN(X)                    (X)->ip_prv2
 148
 149 int             cfiscsi_init(void);
 150 static void     cfiscsi_online(void *arg);
 151 static void     cfiscsi_offline(void *arg);
 152 static int      cfiscsi_targ_enable(void *arg, struct ctl_id targ_id);
 153 static int      cfiscsi_targ_disable(void *arg, struct ctl_id targ_id);
 154 static int      cfiscsi_lun_enable(void *arg,
 155                     struct ctl_id target_id, int lun_id);
 156 static int      cfiscsi_lun_disable(void *arg,
 157                     struct ctl_id target_id, int lun_id);
 158 static int      cfiscsi_ioctl(struct cdev *dev,
 159                     u_long cmd, caddr_t addr, int flag, struct thread *td);
 160 static int      cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len);
 161 static void     cfiscsi_datamove(union ctl_io *io);
 162 static void     cfiscsi_done(union ctl_io *io);
 163 static uint32_t cfiscsi_map_lun(void *arg, uint32_t lun);
 164 static bool     cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request);
 165 static void     cfiscsi_pdu_handle_nop_out(struct icl_pdu *request);
 166 static void     cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request);
 167 static void     cfiscsi_pdu_handle_task_request(struct icl_pdu *request);
 168 static void     cfiscsi_pdu_handle_data_out(struct icl_pdu *request);
 169 static void     cfiscsi_pdu_handle_logout_request(struct icl_pdu *request);
 170 static void     cfiscsi_session_terminate(struct cfiscsi_session *cs);
 171 static struct cfiscsi_target    *cfiscsi_target_find(struct cfiscsi_softc
 172                     *softc, const char *name);
 173 static void     cfiscsi_target_release(struct cfiscsi_target *ct);
 174 static void     cfiscsi_session_delete(struct cfiscsi_session *cs);
 175
 176 static struct cfiscsi_softc cfiscsi_softc;
 177 extern struct ctl_softc *control_softc;
 178
 179 static int cfiscsi_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 180
 181 static moduledata_t cfiscsi_moduledata = {
 182         "ctlcfiscsi",
 183         cfiscsi_module_event_handler,
 184         NULL
 185 };
 186
 187 DECLARE_MODULE(ctlcfiscsi, cfiscsi_moduledata, SI_SUB_CONFIGURE, SI_ORDER_FOURTH);
 188 MODULE_VERSION(ctlcfiscsi, 1);
 189 MODULE_DEPEND(ctlcfiscsi, ctl, 1, 1, 1);
 190 MODULE_DEPEND(ctlcfiscsi, icl, 1, 1, 1);
 191
 192 static struct icl_pdu *
 193 cfiscsi_pdu_new_response(struct icl_pdu *request, int flags)
 194 {
 195
 196         return (icl_pdu_new_bhs(request->ip_conn, flags));
 197 }
 198
 199 static bool
 200 cfiscsi_pdu_update_cmdsn(const struct icl_pdu *request)
 201 {
 202         const struct iscsi_bhs_scsi_command *bhssc;
 203         struct cfiscsi_session *cs;
 204         uint32_t cmdsn, expstatsn;
 205
 206         cs = PDU_SESSION(request);
 207
 208         /*
 209          * Every incoming PDU - not just NOP-Out - resets the ping timer.
 210          * The purpose of the timeout is to reset the connection when it stalls;
 211          * we don't want this to happen when NOP-In or NOP-Out ends up delayed
 212          * in some queue.
 213          *
 214          * XXX: Locking?
 215          */
 216         cs->cs_timeout = 0;
 217
 218         /*
 219          * Data-Out PDUs don't contain CmdSN.
 220          */
 221         if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 222             ISCSI_BHS_OPCODE_SCSI_DATA_OUT)
 223                 return (false);
 224
 225         /*
 226          * We're only using fields common for all the request
 227          * (initiator -> target) PDUs.
 228          */
 229         bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs;
 230         cmdsn = ntohl(bhssc->bhssc_cmdsn);
 231         expstatsn = ntohl(bhssc->bhssc_expstatsn);
 232
 233         CFISCSI_SESSION_LOCK(cs);
 234 #if 0
 235         if (expstatsn != cs->cs_statsn) {
 236                 CFISCSI_SESSION_DEBUG(cs, "received PDU with ExpStatSN %d, "
 237                     "while current StatSN is %d", expstatsn,
 238                     cs->cs_statsn);
 239         }
 240 #endif
 241
 242         /*
 243          * The target MUST silently ignore any non-immediate command outside
 244          * of this range.
 245          */
 246         if (cmdsn < cs->cs_cmdsn || cmdsn > cs->cs_cmdsn + maxcmdsn_delta) {
 247                 CFISCSI_SESSION_UNLOCK(cs);
 248                 CFISCSI_SESSION_WARN(cs, "received PDU with CmdSN %d, "
 249                     "while expected CmdSN was %d", cmdsn, cs->cs_cmdsn);
 250                 return (true);
 251         }
 252
 253         if ((request->ip_bhs->bhs_opcode & ISCSI_BHS_OPCODE_IMMEDIATE) == 0)
 254                 cs->cs_cmdsn++;
 255
 256         CFISCSI_SESSION_UNLOCK(cs);
 257
 258         return (false);
 259 }
 260
 261 static void
 262 cfiscsi_pdu_handle(struct icl_pdu *request)
 263 {
 264         struct cfiscsi_session *cs;
 265         bool ignore;
 266
 267         cs = PDU_SESSION(request);
 268
 269         ignore = cfiscsi_pdu_update_cmdsn(request);
 270         if (ignore) {
 271                 icl_pdu_free(request);
 272                 return;
 273         }
 274
 275         /*
 276          * Handle the PDU; this includes e.g. receiving the remaining
 277          * part of PDU and submitting the SCSI command to CTL
 278          * or queueing a reply.  The handling routine is responsible
 279          * for freeing the PDU when it's no longer needed.
 280          */
 281         switch (request->ip_bhs->bhs_opcode &
 282             ~ISCSI_BHS_OPCODE_IMMEDIATE) {
 283         case ISCSI_BHS_OPCODE_NOP_OUT:
 284                 cfiscsi_pdu_handle_nop_out(request);
 285                 break;
 286         case ISCSI_BHS_OPCODE_SCSI_COMMAND:
 287                 cfiscsi_pdu_handle_scsi_command(request);
 288                 break;
 289         case ISCSI_BHS_OPCODE_TASK_REQUEST:
 290                 cfiscsi_pdu_handle_task_request(request);
 291                 break;
 292         case ISCSI_BHS_OPCODE_SCSI_DATA_OUT:
 293                 cfiscsi_pdu_handle_data_out(request);
 294                 break;
 295         case ISCSI_BHS_OPCODE_LOGOUT_REQUEST:
 296                 cfiscsi_pdu_handle_logout_request(request);
 297                 break;
 298         default:
 299                 CFISCSI_SESSION_WARN(cs, "received PDU with unsupported "
 300                     "opcode 0x%x; dropping connection",
 301                     request->ip_bhs->bhs_opcode);
 302                 icl_pdu_free(request);
 303                 cfiscsi_session_terminate(cs);
 304         }
 305
 306 }
 307
 308 static void
 309 cfiscsi_receive_callback(struct icl_pdu *request)
 310 {
 311         struct cfiscsi_session *cs;
 312
 313         cs = PDU_SESSION(request);
 314
 315 #ifdef ICL_KERNEL_PROXY
 316         if (cs->cs_waiting_for_ctld || cs->cs_login_phase) {
 317                 if (cs->cs_login_pdu == NULL)
 318                         cs->cs_login_pdu = request;
 319                 else
 320                         icl_pdu_free(request);
 321                 cv_signal(&cs->cs_login_cv);
 322                 return;
 323         }
 324 #endif
 325
 326         cfiscsi_pdu_handle(request);
 327 }
 328
 329 static void
 330 cfiscsi_error_callback(struct icl_conn *ic)
 331 {
 332         struct cfiscsi_session *cs;
 333
 334         cs = CONN_SESSION(ic);
 335
 336         CFISCSI_SESSION_WARN(cs, "connection error; dropping connection");
 337         cfiscsi_session_terminate(cs);
 338 }
 339
 340 static int
 341 cfiscsi_pdu_prepare(struct icl_pdu *response)
 342 {
 343         struct cfiscsi_session *cs;
 344         struct iscsi_bhs_scsi_response *bhssr;
 345         bool advance_statsn = true;
 346
 347         cs = PDU_SESSION(response);
 348
 349         CFISCSI_SESSION_LOCK_ASSERT(cs);
 350
 351         /*
 352          * We're only using fields common for all the response
 353          * (target -> initiator) PDUs.
 354          */
 355         bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs;
 356
 357         /*
 358          * 10.8.3: "The StatSN for this connection is not advanced
 359          * after this PDU is sent."
 360          */
 361         if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_R2T)
 362                 advance_statsn = false;
 363
 364         /*
 365          * 10.19.2: "However, when the Initiator Task Tag is set to 0xffffffff,
 366          * StatSN for the connection is not advanced after this PDU is sent."
 367          */
 368         if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_NOP_IN &&
 369             bhssr->bhssr_initiator_task_tag == 0xffffffff)
 370                 advance_statsn = false;
 371
 372         /*
 373          * See the comment below - StatSN is not meaningful and must
 374          * not be advanced.
 375          */
 376         if (bhssr->bhssr_opcode == ISCSI_BHS_OPCODE_SCSI_DATA_IN)
 377                 advance_statsn = false;
 378
 379         /*
 380          * 10.7.3: "The fields StatSN, Status, and Residual Count
 381          * only have meaningful content if the S bit is set to 1."
 382          */
 383         if (bhssr->bhssr_opcode != ISCSI_BHS_OPCODE_SCSI_DATA_IN)
 384                 bhssr->bhssr_statsn = htonl(cs->cs_statsn);
 385         bhssr->bhssr_expcmdsn = htonl(cs->cs_cmdsn);
 386         bhssr->bhssr_maxcmdsn = htonl(cs->cs_cmdsn + maxcmdsn_delta);
 387
 388         if (advance_statsn)
 389                 cs->cs_statsn++;
 390
 391         return (0);
 392 }
 393
 394 static void
 395 cfiscsi_pdu_queue(struct icl_pdu *response)
 396 {
 397         struct cfiscsi_session *cs;
 398
 399         cs = PDU_SESSION(response);
 400
 401         CFISCSI_SESSION_LOCK(cs);
 402         cfiscsi_pdu_prepare(response);
 403         icl_pdu_queue(response);
 404         CFISCSI_SESSION_UNLOCK(cs);
 405 }
 406
 407 static uint32_t
 408 cfiscsi_decode_lun(uint64_t encoded)
 409 {
 410         uint8_t lun[8];
 411         uint32_t result;
 412
 413         /*
 414          * The LUN field in iSCSI PDUs may look like an ordinary 64 bit number,
 415          * but is in fact an evil, multidimensional structure defined
 416          * in SCSI Architecture Model 5 (SAM-5), section 4.6.
 417          */
 418         memcpy(lun, &encoded, sizeof(lun));
 419         switch (lun[0] & 0xC0) {
 420         case 0x00:
 421                 if ((lun[0] & 0x3f) != 0 || lun[2] != 0 || lun[3] != 0 ||
 422                     lun[4] != 0 || lun[5] != 0 || lun[6] != 0 || lun[7] != 0) {
 423                         CFISCSI_WARN("malformed LUN "
 424                             "(peripheral device addressing method): 0x%jx",
 425                             (uintmax_t)encoded);
 426                         result = 0xffffffff;
 427                         break;
 428                 }
 429                 result = lun[1];
 430                 break;
 431         case 0x40:
 432                 if (lun[2] != 0 || lun[3] != 0 || lun[4] != 0 || lun[5] != 0 ||
 433                     lun[6] != 0 || lun[7] != 0) {
 434                         CFISCSI_WARN("malformed LUN "
 435                             "(flat address space addressing method): 0x%jx",
 436                             (uintmax_t)encoded);
 437                         result = 0xffffffff;
 438                         break;
 439                 }
 440                 result = ((lun[0] & 0x3f) << 8) + lun[1];
 441                 break;
 442         case 0xC0:
 443                 if (lun[0] != 0xD2 || lun[4] != 0 || lun[5] != 0 ||
 444                     lun[6] != 0 || lun[7] != 0) {
 445                         CFISCSI_WARN("malformed LUN (extended flat "
 446                             "address space addressing method): 0x%jx",
 447                             (uintmax_t)encoded);
 448                         result = 0xffffffff;
 449                         break;
 450                 }
 451                 result = (lun[1] << 16) + (lun[2] << 8) + lun[3];
 452         default:
 453                 CFISCSI_WARN("unsupported LUN format 0x%jx",
 454                     (uintmax_t)encoded);
 455                 result = 0xffffffff;
 456                 break;
 457         }
 458
 459         return (result);
 460 }
 461
 462 static void
 463 cfiscsi_pdu_handle_nop_out(struct icl_pdu *request)
 464 {
 465         struct cfiscsi_session *cs;
 466         struct iscsi_bhs_nop_out *bhsno;
 467         struct iscsi_bhs_nop_in *bhsni;
 468         struct icl_pdu *response;
 469         void *data = NULL;
 470         size_t datasize;
 471         int error;
 472
 473         cs = PDU_SESSION(request);
 474         bhsno = (struct iscsi_bhs_nop_out *)request->ip_bhs;
 475
 476         if (bhsno->bhsno_initiator_task_tag == 0xffffffff) {
 477                 /*
 478                  * Nothing to do, iscsi_pdu_update_statsn() already
 479                  * zeroed the timeout.
 480                  */
 481                 icl_pdu_free(request);
 482                 return;
 483         }
 484
 485         datasize = icl_pdu_data_segment_length(request);
 486         if (datasize > 0) {
 487                 data = malloc(datasize, M_CFISCSI, M_NOWAIT | M_ZERO);
 488                 if (data == NULL) {
 489                         CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
 490                             "dropping connection");
 491                         icl_pdu_free(request);
 492                         cfiscsi_session_terminate(cs);
 493                         return;
 494                 }
 495                 icl_pdu_get_data(request, 0, data, datasize);
 496         }
 497
 498         response = cfiscsi_pdu_new_response(request, M_NOWAIT);
 499         if (response == NULL) {
 500                 CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
 501                     "droppping connection");
 502                 free(data, M_CFISCSI);
 503                 icl_pdu_free(request);
 504                 cfiscsi_session_terminate(cs);
 505                 return;
 506         }
 507         bhsni = (struct iscsi_bhs_nop_in *)response->ip_bhs;
 508         bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN;
 509         bhsni->bhsni_flags = 0x80;
 510         bhsni->bhsni_initiator_task_tag = bhsno->bhsno_initiator_task_tag;
 511         bhsni->bhsni_target_transfer_tag = 0xffffffff;
 512         if (datasize > 0) {
 513                 error = icl_pdu_append_data(response, data, datasize, M_NOWAIT);
 514                 if (error != 0) {
 515                         CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
 516                             "dropping connection");
 517                         free(data, M_CFISCSI);
 518                         icl_pdu_free(request);
 519                         icl_pdu_free(response);
 520                         cfiscsi_session_terminate(cs);
 521                         return;
 522                 }
 523                 free(data, M_CFISCSI);
 524         }
 525
 526         icl_pdu_free(request);
 527         cfiscsi_pdu_queue(response);
 528 }
 529
 530 static void
 531 cfiscsi_pdu_handle_scsi_command(struct icl_pdu *request)
 532 {
 533         struct iscsi_bhs_scsi_command *bhssc;
 534         struct cfiscsi_session *cs;
 535         union ctl_io *io;
 536         int error;
 537
 538         cs = PDU_SESSION(request);
 539         bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs;
 540         //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x",
 541         //    bhssc->bhssc_initiator_task_tag);
 542
 543         if (request->ip_data_len > 0 && cs->cs_immediate_data == false) {
 544                 CFISCSI_SESSION_WARN(cs, "unsolicited data with "
 545                     "ImmediateData=No; dropping connection");
 546                 icl_pdu_free(request);
 547                 cfiscsi_session_terminate(cs);
 548                 return;
 549         }
 550         io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref);
 551         if (io == NULL) {
 552                 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io; "
 553                     "dropping connection");
 554                 icl_pdu_free(request);
 555                 cfiscsi_session_terminate(cs);
 556                 return;
 557         }
 558         ctl_zero_io(io);
 559         io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request;
 560         io->io_hdr.io_type = CTL_IO_SCSI;
 561         io->io_hdr.nexus.initid.id = cs->cs_ctl_initid;
 562         io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port;
 563         io->io_hdr.nexus.targ_target.id = 0;
 564         io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhssc->bhssc_lun);
 565         io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun;
 566         io->io_hdr.nexus.lun_map_arg = cs;
 567         io->scsiio.tag_num = bhssc->bhssc_initiator_task_tag;
 568         switch ((bhssc->bhssc_flags & BHSSC_FLAGS_ATTR)) {
 569         case BHSSC_FLAGS_ATTR_UNTAGGED:
 570                 io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 571                 break;
 572         case BHSSC_FLAGS_ATTR_SIMPLE:
 573                 io->scsiio.tag_type = CTL_TAG_SIMPLE;
 574                 break;
 575         case BHSSC_FLAGS_ATTR_ORDERED:
 576                 io->scsiio.tag_type = CTL_TAG_ORDERED;
 577                 break;
 578         case BHSSC_FLAGS_ATTR_HOQ:
 579                 io->scsiio.tag_type = CTL_TAG_HEAD_OF_QUEUE;
 580                 break;
 581         case BHSSC_FLAGS_ATTR_ACA:
 582                 io->scsiio.tag_type = CTL_TAG_ACA;
 583                 break;
 584         default:
 585                 io->scsiio.tag_type = CTL_TAG_UNTAGGED;
 586                 CFISCSI_SESSION_WARN(cs, "unhandled tag type %d",
 587                     bhssc->bhssc_flags & BHSSC_FLAGS_ATTR);
 588                 break;
 589         }
 590         io->scsiio.cdb_len = sizeof(bhssc->bhssc_cdb); /* Which is 16. */
 591         memcpy(io->scsiio.cdb, bhssc->bhssc_cdb, sizeof(bhssc->bhssc_cdb));
 592         refcount_acquire(&cs->cs_outstanding_ctl_pdus);
 593         error = ctl_queue(io);
 594         if (error != CTL_RETVAL_COMPLETE) {
 595                 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; "
 596                     "dropping connection", error);
 597                 ctl_free_io(io);
 598                 refcount_release(&cs->cs_outstanding_ctl_pdus);
 599                 icl_pdu_free(request);
 600                 cfiscsi_session_terminate(cs);
 601         }
 602 }
 603
 604 static void
 605 cfiscsi_pdu_handle_task_request(struct icl_pdu *request)
 606 {
 607         struct iscsi_bhs_task_management_request *bhstmr;
 608         struct iscsi_bhs_task_management_response *bhstmr2;
 609         struct icl_pdu *response;
 610         struct cfiscsi_session *cs;
 611         union ctl_io *io;
 612         int error;
 613
 614         cs = PDU_SESSION(request);
 615         bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs;
 616         io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref);
 617         if (io == NULL) {
 618                 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io;"
 619                     "dropping connection");
 620                 icl_pdu_free(request);
 621                 cfiscsi_session_terminate(cs);
 622                 return;
 623         }
 624         ctl_zero_io(io);
 625         io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = request;
 626         io->io_hdr.io_type = CTL_IO_TASK;
 627         io->io_hdr.nexus.initid.id = cs->cs_ctl_initid;
 628         io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port;
 629         io->io_hdr.nexus.targ_target.id = 0;
 630         io->io_hdr.nexus.targ_lun = cfiscsi_decode_lun(bhstmr->bhstmr_lun);
 631         io->io_hdr.nexus.lun_map_fn = cfiscsi_map_lun;
 632         io->io_hdr.nexus.lun_map_arg = cs;
 633         io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */
 634
 635         switch (bhstmr->bhstmr_function & ~0x80) {
 636         case BHSTMR_FUNCTION_ABORT_TASK:
 637 #if 0
 638                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_ABORT_TASK");
 639 #endif
 640                 io->taskio.task_action = CTL_TASK_ABORT_TASK;
 641                 io->taskio.tag_num = bhstmr->bhstmr_referenced_task_tag;
 642                 break;
 643         case BHSTMR_FUNCTION_LOGICAL_UNIT_RESET:
 644 #if 0
 645                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_LOGICAL_UNIT_RESET");
 646 #endif
 647                 io->taskio.task_action = CTL_TASK_LUN_RESET;
 648                 break;
 649         case BHSTMR_FUNCTION_TARGET_WARM_RESET:
 650 #if 0
 651                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_FUNCTION_TARGET_WARM_RESET");
 652 #endif
 653                 io->taskio.task_action = CTL_TASK_TARGET_RESET;
 654                 break;
 655         default:
 656                 CFISCSI_SESSION_DEBUG(cs, "unsupported function 0x%x",
 657                     bhstmr->bhstmr_function & ~0x80);
 658                 ctl_free_io(io);
 659
 660                 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
 661                 if (response == NULL) {
 662                         CFISCSI_SESSION_WARN(cs, "failed to allocate memory; "
 663                             "dropping connection");
 664                         icl_pdu_free(request);
 665                         cfiscsi_session_terminate(cs);
 666                         return;
 667                 }
 668                 bhstmr2 = (struct iscsi_bhs_task_management_response *)
 669                     response->ip_bhs;
 670                 bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE;
 671                 bhstmr2->bhstmr_flags = 0x80;
 672                 bhstmr2->bhstmr_response =
 673                     BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED;
 674                 bhstmr2->bhstmr_initiator_task_tag =
 675                     bhstmr->bhstmr_initiator_task_tag;
 676                 icl_pdu_free(request);
 677                 cfiscsi_pdu_queue(response);
 678                 return;
 679         }
 680
 681         refcount_acquire(&cs->cs_outstanding_ctl_pdus);
 682         error = ctl_queue(io);
 683         if (error != CTL_RETVAL_COMPLETE) {
 684                 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d; "
 685                     "dropping connection", error);
 686                 ctl_free_io(io);
 687                 refcount_release(&cs->cs_outstanding_ctl_pdus);
 688                 icl_pdu_free(request);
 689                 cfiscsi_session_terminate(cs);
 690         }
 691 }
 692
 693 static bool
 694 cfiscsi_handle_data_segment(struct icl_pdu *request, struct cfiscsi_data_wait *cdw)
 695 {
 696         struct iscsi_bhs_data_out *bhsdo;
 697         struct cfiscsi_session *cs;
 698         struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
 699         size_t copy_len, len, off, buffer_offset;
 700         int ctl_sg_count;
 701         union ctl_io *io;
 702
 703         cs = PDU_SESSION(request);
 704
 705         KASSERT((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 706             ISCSI_BHS_OPCODE_SCSI_DATA_OUT ||
 707             (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 708             ISCSI_BHS_OPCODE_SCSI_COMMAND,
 709             ("bad opcode 0x%x", request->ip_bhs->bhs_opcode));
 710
 711         /*
 712          * We're only using fields common for Data-Out and SCSI Command PDUs.
 713          */
 714         bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs;
 715
 716         io = cdw->cdw_ctl_io;
 717         KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN,
 718             ("CTL_FLAG_DATA_IN"));
 719
 720 #if 0
 721         CFISCSI_SESSION_DEBUG(cs, "received %zd bytes out of %d",
 722             request->ip_data_len, io->scsiio.kern_total_len);
 723 #endif
 724
 725         if (io->scsiio.kern_sg_entries > 0) {
 726                 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
 727                 ctl_sg_count = io->scsiio.kern_sg_entries;
 728         } else {
 729                 ctl_sglist = &ctl_sg_entry;
 730                 ctl_sglist->addr = io->scsiio.kern_data_ptr;
 731                 ctl_sglist->len = io->scsiio.kern_data_len;
 732                 ctl_sg_count = 1;
 733         }
 734
 735         if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 736             ISCSI_BHS_OPCODE_SCSI_DATA_OUT)
 737                 buffer_offset = ntohl(bhsdo->bhsdo_buffer_offset);
 738         else
 739                 buffer_offset = 0;
 740         len = icl_pdu_data_segment_length(request);
 741
 742         /*
 743          * Make sure the offset, as sent by the initiator, matches the offset
 744          * we're supposed to be at in the scatter-gather list.
 745          */
 746         if (buffer_offset >
 747             io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled ||
 748             buffer_offset + len <=
 749             io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled) {
 750                 CFISCSI_SESSION_WARN(cs, "received bad buffer offset %zd, "
 751                     "expected %zd; dropping connection", buffer_offset,
 752                     (size_t)io->scsiio.kern_rel_offset +
 753                     (size_t)io->scsiio.ext_data_filled);
 754                 ctl_set_data_phase_error(&io->scsiio);
 755                 cfiscsi_session_terminate(cs);
 756                 return (true);
 757         }
 758
 759         /*
 760          * This is the offset within the PDU data segment, as opposed
 761          * to buffer_offset, which is the offset within the task (SCSI
 762          * command).
 763          */
 764         off = io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled -
 765             buffer_offset;
 766
 767         /*
 768          * Iterate over the scatter/gather segments, filling them with data
 769          * from the PDU data segment.  Note that this can get called multiple
 770          * times for one SCSI command; the cdw structure holds state for the
 771          * scatter/gather list.
 772          */
 773         for (;;) {
 774                 KASSERT(cdw->cdw_sg_index < ctl_sg_count,
 775                     ("cdw->cdw_sg_index >= ctl_sg_count"));
 776                 if (cdw->cdw_sg_len == 0) {
 777                         cdw->cdw_sg_addr = ctl_sglist[cdw->cdw_sg_index].addr;
 778                         cdw->cdw_sg_len = ctl_sglist[cdw->cdw_sg_index].len;
 779                 }
 780                 KASSERT(off <= len, ("len > off"));
 781                 copy_len = len - off;
 782                 if (copy_len > cdw->cdw_sg_len)
 783                         copy_len = cdw->cdw_sg_len;
 784
 785                 icl_pdu_get_data(request, off, cdw->cdw_sg_addr, copy_len);
 786                 cdw->cdw_sg_addr += copy_len;
 787                 cdw->cdw_sg_len -= copy_len;
 788                 off += copy_len;
 789                 io->scsiio.ext_data_filled += copy_len;
 790
 791                 if (cdw->cdw_sg_len == 0) {
 792                         /*
 793                          * End of current segment.
 794                          */
 795                         if (cdw->cdw_sg_index == ctl_sg_count - 1) {
 796                                 /*
 797                                  * Last segment in scatter/gather list.
 798                                  */
 799                                 break;
 800                         }
 801                         cdw->cdw_sg_index++;
 802                 }
 803
 804                 if (off == len) {
 805                         /*
 806                          * End of PDU payload.
 807                          */
 808                         break;
 809                 }
 810         }
 811
 812         if (len > off) {
 813                 /*
 814                  * In case of unsolicited data, it's possible that the buffer
 815                  * provided by CTL is smaller than negotiated FirstBurstLength.
 816                  * Just ignore the superfluous data; will ask for them with R2T
 817                  * on next call to cfiscsi_datamove().
 818                  *
 819                  * This obviously can only happen with SCSI Command PDU.
 820                  */
 821                 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 822                     ISCSI_BHS_OPCODE_SCSI_COMMAND)
 823                         return (true);
 824
 825                 CFISCSI_SESSION_WARN(cs, "received too much data: got %zd bytes, "
 826                     "expected %zd; dropping connection",
 827                     icl_pdu_data_segment_length(request), off);
 828                 ctl_set_data_phase_error(&io->scsiio);
 829                 cfiscsi_session_terminate(cs);
 830                 return (true);
 831         }
 832
 833         if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len &&
 834             (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) == 0) {
 835                 CFISCSI_SESSION_WARN(cs, "got the final packet without "
 836                     "the F flag; flags = 0x%x; dropping connection",
 837                     bhsdo->bhsdo_flags);
 838                 ctl_set_data_phase_error(&io->scsiio);
 839                 cfiscsi_session_terminate(cs);
 840                 return (true);
 841         }
 842
 843         if (io->scsiio.ext_data_filled != io->scsiio.kern_data_len &&
 844             (bhsdo->bhsdo_flags & BHSDO_FLAGS_F) != 0) {
 845                 if ((request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
 846                     ISCSI_BHS_OPCODE_SCSI_DATA_OUT) {
 847                         CFISCSI_SESSION_WARN(cs, "got the final packet, but the "
 848                             "transmitted size was %zd bytes instead of %d; "
 849                             "dropping connection",
 850                             (size_t)io->scsiio.ext_data_filled,
 851                             io->scsiio.kern_data_len);
 852                         ctl_set_data_phase_error(&io->scsiio);
 853                         cfiscsi_session_terminate(cs);
 854                         return (true);
 855                 } else {
 856                         /*
 857                          * For SCSI Command PDU, this just means we need to
 858                          * solicit more data by sending R2T.
 859                          */
 860                         return (false);
 861                 }
 862         }
 863
 864         if (io->scsiio.ext_data_filled == io->scsiio.kern_data_len) {
 865 #if 0
 866                 CFISCSI_SESSION_DEBUG(cs, "no longer expecting Data-Out with target "
 867                     "transfer tag 0x%x", cdw->cdw_target_transfer_tag);
 868 #endif
 869
 870                 return (true);
 871         }
 872
 873         return (false);
 874 }
 875
 876 static void
 877 cfiscsi_pdu_handle_data_out(struct icl_pdu *request)
 878 {
 879         struct iscsi_bhs_data_out *bhsdo;
 880         struct cfiscsi_session *cs;
 881         struct cfiscsi_data_wait *cdw = NULL;
 882         union ctl_io *io;
 883         bool done;
 884
 885         cs = PDU_SESSION(request);
 886         bhsdo = (struct iscsi_bhs_data_out *)request->ip_bhs;
 887
 888         CFISCSI_SESSION_LOCK(cs);
 889         TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next) {
 890 #if 0
 891                 CFISCSI_SESSION_DEBUG(cs, "have ttt 0x%x, itt 0x%x; looking for "
 892                     "ttt 0x%x, itt 0x%x",
 893                     bhsdo->bhsdo_target_transfer_tag,
 894                     bhsdo->bhsdo_initiator_task_tag,
 895                     cdw->cdw_target_transfer_tag, cdw->cdw_initiator_task_tag));
 896 #endif
 897                 if (bhsdo->bhsdo_target_transfer_tag ==
 898                     cdw->cdw_target_transfer_tag)
 899                         break;
 900         }
 901         CFISCSI_SESSION_UNLOCK(cs);
 902         if (cdw == NULL) {
 903                 CFISCSI_SESSION_WARN(cs, "data transfer tag 0x%x, initiator task tag "
 904                     "0x%x, not found; dropping connection",
 905                     bhsdo->bhsdo_target_transfer_tag, bhsdo->bhsdo_initiator_task_tag);
 906                 icl_pdu_free(request);
 907                 cfiscsi_session_terminate(cs);
 908                 return;
 909         }
 910
 911         io = cdw->cdw_ctl_io;
 912         KASSERT((io->io_hdr.flags & CTL_FLAG_DATA_MASK) != CTL_FLAG_DATA_IN,
 913             ("CTL_FLAG_DATA_IN"));
 914
 915         done = cfiscsi_handle_data_segment(request, cdw);
 916         if (done) {
 917                 CFISCSI_SESSION_LOCK(cs);
 918                 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next);
 919                 CFISCSI_SESSION_UNLOCK(cs);
 920                 uma_zfree(cfiscsi_data_wait_zone, cdw);
 921                 io->scsiio.be_move_done(io);
 922         }
 923
 924         icl_pdu_free(request);
 925 }
 926
 927 static void
 928 cfiscsi_pdu_handle_logout_request(struct icl_pdu *request)
 929 {
 930         struct iscsi_bhs_logout_request *bhslr;
 931         struct iscsi_bhs_logout_response *bhslr2;
 932         struct icl_pdu *response;
 933         struct cfiscsi_session *cs;
 934
 935         cs = PDU_SESSION(request);
 936         bhslr = (struct iscsi_bhs_logout_request *)request->ip_bhs;
 937         switch (bhslr->bhslr_reason & 0x7f) {
 938         case BHSLR_REASON_CLOSE_SESSION:
 939         case BHSLR_REASON_CLOSE_CONNECTION:
 940                 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
 941                 if (response == NULL) {
 942                         CFISCSI_SESSION_DEBUG(cs, "failed to allocate memory");
 943                         icl_pdu_free(request);
 944                         cfiscsi_session_terminate(cs);
 945                         return;
 946                 }
 947                 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs;
 948                 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE;
 949                 bhslr2->bhslr_flags = 0x80;
 950                 bhslr2->bhslr_response = BHSLR_RESPONSE_CLOSED_SUCCESSFULLY;
 951                 bhslr2->bhslr_initiator_task_tag =
 952                     bhslr->bhslr_initiator_task_tag;
 953                 icl_pdu_free(request);
 954                 cfiscsi_pdu_queue(response);
 955                 cfiscsi_session_terminate(cs);
 956                 break;
 957         case BHSLR_REASON_REMOVE_FOR_RECOVERY:
 958                 response = cfiscsi_pdu_new_response(request, M_NOWAIT);
 959                 if (response == NULL) {
 960                         CFISCSI_SESSION_WARN(cs,
 961                             "failed to allocate memory; dropping connection");
 962                         icl_pdu_free(request);
 963                         cfiscsi_session_terminate(cs);
 964                         return;
 965                 }
 966                 bhslr2 = (struct iscsi_bhs_logout_response *)response->ip_bhs;
 967                 bhslr2->bhslr_opcode = ISCSI_BHS_OPCODE_LOGOUT_RESPONSE;
 968                 bhslr2->bhslr_flags = 0x80;
 969                 bhslr2->bhslr_response = BHSLR_RESPONSE_RECOVERY_NOT_SUPPORTED;
 970                 bhslr2->bhslr_initiator_task_tag =
 971                     bhslr->bhslr_initiator_task_tag;
 972                 icl_pdu_free(request);
 973                 cfiscsi_pdu_queue(response);
 974                 break;
 975         default:
 976                 CFISCSI_SESSION_WARN(cs, "invalid reason 0%x; dropping connection",
 977                     bhslr->bhslr_reason);
 978                 icl_pdu_free(request);
 979                 cfiscsi_session_terminate(cs);
 980                 break;
 981         }
 982 }
 983
 984 static void
 985 cfiscsi_callout(void *context)
 986 {
 987         struct icl_pdu *cp;
 988         struct iscsi_bhs_nop_in *bhsni;
 989         struct cfiscsi_session *cs;
 990
 991         cs = context;
 992
 993         if (cs->cs_terminating)
 994                 return;
 995
 996         callout_schedule(&cs->cs_callout, 1 * hz);
 997
 998         atomic_add_int(&cs->cs_timeout, 1);
 999
1000 #ifdef ICL_KERNEL_PROXY
1001         if (cs->cs_waiting_for_ctld || cs->cs_login_phase) {
1002                 if (cs->cs_timeout > login_timeout) {
1003                         CFISCSI_SESSION_WARN(cs, "login timed out after "
1004                             "%d seconds; dropping connection", cs->cs_timeout);
1005                         cfiscsi_session_terminate(cs);
1006                 }
1007                 return;
1008         }
1009 #endif
1010
1011         if (cs->cs_timeout >= ping_timeout) {
1012                 CFISCSI_SESSION_WARN(cs, "no ping reply (NOP-Out) after %d seconds; "
1013                     "dropping connection",  ping_timeout);
1014                 cfiscsi_session_terminate(cs);
1015                 return;
1016         }
1017
1018         /*
1019          * If the ping was reset less than one second ago - which means
1020          * that we've received some PDU during the last second - assume
1021          * the traffic flows correctly and don't bother sending a NOP-Out.
1022          *
1023          * (It's 2 - one for one second, and one for incrementing is_timeout
1024          * earlier in this routine.)
1025          */
1026         if (cs->cs_timeout < 2)
1027                 return;
1028
1029         cp = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT);
1030         if (cp == NULL) {
1031                 CFISCSI_SESSION_WARN(cs, "failed to allocate memory");
1032                 return;
1033         }
1034         bhsni = (struct iscsi_bhs_nop_in *)cp->ip_bhs;
1035         bhsni->bhsni_opcode = ISCSI_BHS_OPCODE_NOP_IN;
1036         bhsni->bhsni_flags = 0x80;
1037         bhsni->bhsni_initiator_task_tag = 0xffffffff;
1038
1039         cfiscsi_pdu_queue(cp);
1040 }
1041
1042 static void
1043 cfiscsi_session_terminate_tasks(struct cfiscsi_session *cs)
1044 {
1045         struct cfiscsi_data_wait *cdw, *tmpcdw;
1046         union ctl_io *io;
1047         int error;
1048
1049 #ifdef notyet
1050         io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref);
1051         if (io == NULL) {
1052                 CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io");
1053                 return;
1054         }
1055         ctl_zero_io(io);
1056         io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL;
1057         io->io_hdr.io_type = CTL_IO_TASK;
1058         io->io_hdr.nexus.initid.id = cs->cs_ctl_initid;
1059         io->io_hdr.nexus.targ_port = cs->cs_target->ct_softc->fe.targ_port;
1060         io->io_hdr.nexus.targ_target.id = 0;
1061         io->io_hdr.nexus.targ_lun = lun;
1062         io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */
1063         io->taskio.task_action = CTL_TASK_ABORT_TASK_SET;
1064         error = ctl_queue(io);
1065         if (error != CTL_RETVAL_COMPLETE) {
1066                 CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error);
1067                 ctl_free_io(io);
1068         }
1069 #else
1070         /*
1071          * CTL doesn't currently support CTL_TASK_ABORT_TASK_SET, so instead
1072          * just iterate over tasks that are waiting for something - data - and
1073          * terminate those.
1074          */
1075         CFISCSI_SESSION_LOCK(cs);
1076         TAILQ_FOREACH_SAFE(cdw,
1077             &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) {
1078                 io = ctl_alloc_io(cs->cs_target->ct_softc->fe.ctl_pool_ref);
1079                 if (io == NULL) {
1080                         CFISCSI_SESSION_WARN(cs, "can't allocate ctl_io");
1081                         return;
1082                 }
1083                 ctl_zero_io(io);
1084                 io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = NULL;
1085                 io->io_hdr.io_type = CTL_IO_TASK;
1086                 io->io_hdr.nexus.initid.id = cs->cs_ctl_initid;
1087                 io->io_hdr.nexus.targ_port =
1088                     cs->cs_target->ct_softc->fe.targ_port;
1089                 io->io_hdr.nexus.targ_target.id = 0;
1090                 //io->io_hdr.nexus.targ_lun = lun; /* Not needed? */
1091                 io->taskio.tag_type = CTL_TAG_SIMPLE; /* XXX */
1092                 io->taskio.task_action = CTL_TASK_ABORT_TASK;
1093                 io->taskio.tag_num = cdw->cdw_initiator_task_tag;
1094                 error = ctl_queue(io);
1095                 if (error != CTL_RETVAL_COMPLETE) {
1096                         CFISCSI_SESSION_WARN(cs, "ctl_queue() failed; error %d", error);
1097                         ctl_free_io(io);
1098                         return;
1099                 }
1100 #if 0
1101                 CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task tag "
1102                     "0x%x", cdw->cdw_initiator_task_tag);
1103 #endif
1104                 cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io);
1105                 TAILQ_REMOVE(&cs->cs_waiting_for_data_out, cdw, cdw_next);
1106                 uma_zfree(cfiscsi_data_wait_zone, cdw);
1107         }
1108         CFISCSI_SESSION_UNLOCK(cs);
1109 #endif
1110 }
1111
1112 static void
1113 cfiscsi_maintenance_thread(void *arg)
1114 {
1115         struct cfiscsi_session *cs;
1116
1117         cs = arg;
1118
1119         for (;;) {
1120                 CFISCSI_SESSION_LOCK(cs);
1121                 if (cs->cs_terminating == false)
1122                         cv_wait(&cs->cs_maintenance_cv, &cs->cs_lock);
1123                 CFISCSI_SESSION_UNLOCK(cs);
1124
1125                 if (cs->cs_terminating) {
1126                         cfiscsi_session_terminate_tasks(cs);
1127                         callout_drain(&cs->cs_callout);
1128
1129                         icl_conn_shutdown(cs->cs_conn);
1130                         icl_conn_close(cs->cs_conn);
1131
1132                         cs->cs_terminating++;
1133
1134                         /*
1135                          * XXX: We used to wait up to 30 seconds to deliver queued PDUs
1136                          *      to the initiator.  We also tried hard to deliver SCSI Responses
1137                          *      for the aborted PDUs.  We don't do that anymore.  We might need
1138                          *      to revisit that.
1139                          */
1140
1141                         cfiscsi_session_delete(cs);
1142                         kthread_exit();
1143                         return;
1144                 }
1145                 CFISCSI_SESSION_DEBUG(cs, "nothing to do");
1146         }
1147 }
1148
1149 static void
1150 cfiscsi_session_terminate(struct cfiscsi_session *cs)
1151 {
1152
1153         if (cs->cs_terminating != 0)
1154                 return;
1155         cs->cs_terminating = 1;
1156         cv_signal(&cs->cs_maintenance_cv);
1157 #ifdef ICL_KERNEL_PROXY
1158         cv_signal(&cs->cs_login_cv);
1159 #endif
1160 }
1161
1162 static int
1163 cfiscsi_session_register_initiator(struct cfiscsi_session *cs)
1164 {
1165         int error, i;
1166         struct cfiscsi_softc *softc;
1167
1168         KASSERT(cs->cs_ctl_initid == -1, ("already registered"));
1169
1170         softc = &cfiscsi_softc;
1171
1172         mtx_lock(&softc->lock);
1173         for (i = 0; i < softc->max_initiators; i++) {
1174                 if (softc->ctl_initids[i] == 0)
1175                         break;
1176         }
1177         if (i == softc->max_initiators) {
1178                 CFISCSI_SESSION_WARN(cs, "too many concurrent sessions (%d)",
1179                     softc->max_initiators);
1180                 mtx_unlock(&softc->lock);
1181                 return (1);
1182         }
1183         softc->ctl_initids[i] = 1;
1184         mtx_unlock(&softc->lock);
1185
1186 #if 0
1187         CFISCSI_SESSION_DEBUG(cs, "adding initiator id %d, max %d",
1188             i, softc->max_initiators);
1189 #endif
1190         cs->cs_ctl_initid = i;
1191         error = ctl_add_initiator(0x0, softc->fe.targ_port, cs->cs_ctl_initid);
1192         if (error != 0) {
1193                 CFISCSI_SESSION_WARN(cs, "ctl_add_initiator failed with error %d", error);
1194                 mtx_lock(&softc->lock);
1195                 softc->ctl_initids[cs->cs_ctl_initid] = 0;
1196                 mtx_unlock(&softc->lock);
1197                 cs->cs_ctl_initid = -1;
1198                 return (1);
1199         }
1200
1201         return (0);
1202 }
1203
1204 static void
1205 cfiscsi_session_unregister_initiator(struct cfiscsi_session *cs)
1206 {
1207         int error;
1208         struct cfiscsi_softc *softc;
1209
1210         if (cs->cs_ctl_initid == -1)
1211                 return;
1212
1213         softc = &cfiscsi_softc;
1214
1215         error = ctl_remove_initiator(softc->fe.targ_port, cs->cs_ctl_initid);
1216         if (error != 0) {
1217                 CFISCSI_SESSION_WARN(cs, "ctl_remove_initiator failed with error %d",
1218                     error);
1219         }
1220         mtx_lock(&softc->lock);
1221         softc->ctl_initids[cs->cs_ctl_initid] = 0;
1222         mtx_unlock(&softc->lock);
1223         cs->cs_ctl_initid = -1;
1224 }
1225
1226 static struct cfiscsi_session *
1227 cfiscsi_session_new(struct cfiscsi_softc *softc)
1228 {
1229         struct cfiscsi_session *cs;
1230         int error;
1231
1232         cs = malloc(sizeof(*cs), M_CFISCSI, M_NOWAIT | M_ZERO);
1233         if (cs == NULL) {
1234                 CFISCSI_WARN("malloc failed");
1235                 return (NULL);
1236         }
1237         cs->cs_ctl_initid = -1;
1238
1239         refcount_init(&cs->cs_outstanding_ctl_pdus, 0);
1240         TAILQ_INIT(&cs->cs_waiting_for_data_out);
1241         mtx_init(&cs->cs_lock, "cfiscsi_lock", NULL, MTX_DEF);
1242         cv_init(&cs->cs_maintenance_cv, "cfiscsi_mt");
1243 #ifdef ICL_KERNEL_PROXY
1244         cv_init(&cs->cs_login_cv, "cfiscsi_login");
1245 #endif
1246
1247         cs->cs_conn = icl_conn_new("cfiscsi", &cs->cs_lock);
1248         cs->cs_conn->ic_receive = cfiscsi_receive_callback;
1249         cs->cs_conn->ic_error = cfiscsi_error_callback;
1250         cs->cs_conn->ic_prv0 = cs;
1251
1252         error = kthread_add(cfiscsi_maintenance_thread, cs, NULL, NULL, 0, 0, "cfiscsimt");
1253         if (error != 0) {
1254                 CFISCSI_SESSION_WARN(cs, "kthread_add(9) failed with error %d", error);
1255                 free(cs, M_CFISCSI);
1256                 return (NULL);
1257         }
1258
1259         mtx_lock(&softc->lock);
1260         cs->cs_id = softc->last_session_id + 1;
1261         softc->last_session_id++;
1262         mtx_unlock(&softc->lock);
1263
1264         mtx_lock(&softc->lock);
1265         TAILQ_INSERT_TAIL(&softc->sessions, cs, cs_next);
1266         mtx_unlock(&softc->lock);
1267
1268         /*
1269          * Start pinging the initiator.
1270          */
1271         callout_init(&cs->cs_callout, 1);
1272         callout_reset(&cs->cs_callout, 1 * hz, cfiscsi_callout, cs);
1273
1274         return (cs);
1275 }
1276
1277 static void
1278 cfiscsi_session_delete(struct cfiscsi_session *cs)
1279 {
1280         struct cfiscsi_softc *softc;
1281
1282         softc = &cfiscsi_softc;
1283
1284         KASSERT(cs->cs_outstanding_ctl_pdus == 0,
1285             ("destroying session with outstanding CTL pdus"));
1286         KASSERT(TAILQ_EMPTY(&cs->cs_waiting_for_data_out),
1287             ("destroying session with non-empty queue"));
1288
1289         cfiscsi_session_unregister_initiator(cs);
1290         if (cs->cs_target != NULL)
1291                 cfiscsi_target_release(cs->cs_target);
1292         icl_conn_close(cs->cs_conn);
1293         icl_conn_free(cs->cs_conn);
1294
1295         mtx_lock(&softc->lock);
1296         TAILQ_REMOVE(&softc->sessions, cs, cs_next);
1297         mtx_unlock(&softc->lock);
1298
1299         free(cs, M_CFISCSI);
1300 }
1301
1302 int
1303 cfiscsi_init(void)
1304 {
1305         struct cfiscsi_softc *softc;
1306         struct ctl_frontend *fe;
1307         int retval;
1308
1309         softc = &cfiscsi_softc;
1310         retval = 0;
1311         bzero(softc, sizeof(*softc));
1312         mtx_init(&softc->lock, "cfiscsi", NULL, MTX_DEF);
1313
1314 #ifdef ICL_KERNEL_PROXY
1315         cv_init(&softc->accept_cv, "cfiscsi_accept");
1316 #endif
1317         TAILQ_INIT(&softc->sessions);
1318         TAILQ_INIT(&softc->targets);
1319
1320         fe = &softc->fe;
1321         fe->port_type = CTL_PORT_ISCSI;
1322         /* XXX KDM what should the real number be here? */
1323         fe->num_requested_ctl_io = 4096;
1324         snprintf(softc->port_name, sizeof(softc->port_name), "iscsi");
1325         fe->port_name = softc->port_name;
1326         fe->port_online = cfiscsi_online;
1327         fe->port_offline = cfiscsi_offline;
1328         fe->onoff_arg = softc;
1329         fe->targ_enable = cfiscsi_targ_enable;
1330         fe->targ_disable = cfiscsi_targ_disable;
1331         fe->lun_enable = cfiscsi_lun_enable;
1332         fe->lun_disable = cfiscsi_lun_disable;
1333         fe->targ_lun_arg = softc;
1334         fe->ioctl = cfiscsi_ioctl;
1335         fe->devid = cfiscsi_devid;
1336         fe->fe_datamove = cfiscsi_datamove;
1337         fe->fe_done = cfiscsi_done;
1338
1339         /* XXX KDM what should we report here? */
1340         /* XXX These should probably be fetched from CTL. */
1341         fe->max_targets = 1;
1342         fe->max_target_id = 15;
1343
1344         retval = ctl_frontend_register(fe, /*master_SC*/ 1);
1345         if (retval != 0) {
1346                 CFISCSI_WARN("ctl_frontend_register() failed with error %d",
1347                     retval);
1348                 retval = 1;
1349                 goto bailout;
1350         }
1351
1352         softc->max_initiators = fe->max_initiators;
1353
1354         cfiscsi_data_wait_zone = uma_zcreate("cfiscsi_data_wait",
1355             sizeof(struct cfiscsi_data_wait), NULL, NULL, NULL, NULL,
1356             UMA_ALIGN_PTR, 0);
1357
1358         return (0);
1359
1360 bailout:
1361         return (retval);
1362 }
1363
1364 static int
1365 cfiscsi_module_event_handler(module_t mod, int what, void *arg)
1366 {
1367
1368         switch (what) {
1369         case MOD_LOAD:
1370                 return (cfiscsi_init());
1371         case MOD_UNLOAD:
1372                 return (EBUSY);
1373         default:
1374                 return (EOPNOTSUPP);
1375         }
1376 }
1377
1378 #ifdef ICL_KERNEL_PROXY
1379 static void
1380 cfiscsi_accept(struct socket *so, struct sockaddr *sa, int portal_id)
1381 {
1382         struct cfiscsi_session *cs;
1383
1384         cs = cfiscsi_session_new(&cfiscsi_softc);
1385         if (cs == NULL) {
1386                 CFISCSI_WARN("failed to create session");
1387                 return;
1388         }
1389
1390         icl_conn_handoff_sock(cs->cs_conn, so);
1391         cs->cs_initiator_sa = sa;
1392         cs->cs_portal_id = portal_id;
1393         cs->cs_waiting_for_ctld = true;
1394         cv_signal(&cfiscsi_softc.accept_cv);
1395 }
1396 #endif
1397
1398 static void
1399 cfiscsi_online(void *arg)
1400 {
1401         struct cfiscsi_softc *softc;
1402
1403         softc = (struct cfiscsi_softc *)arg;
1404
1405         softc->online = 1;
1406 #ifdef ICL_KERNEL_PROXY
1407         if (softc->listener != NULL)
1408                 icl_listen_free(softc->listener);
1409         softc->listener = icl_listen_new(cfiscsi_accept);
1410 #endif
1411 }
1412
1413 static void
1414 cfiscsi_offline(void *arg)
1415 {
1416         struct cfiscsi_softc *softc;
1417         struct cfiscsi_session *cs;
1418
1419         softc = (struct cfiscsi_softc *)arg;
1420
1421         softc->online = 0;
1422
1423         mtx_lock(&softc->lock);
1424         TAILQ_FOREACH(cs, &softc->sessions, cs_next)
1425                 cfiscsi_session_terminate(cs);
1426         mtx_unlock(&softc->lock);
1427
1428 #ifdef ICL_KERNEL_PROXY
1429         icl_listen_free(softc->listener);
1430         softc->listener = NULL;
1431 #endif
1432 }
1433
1434 static int
1435 cfiscsi_targ_enable(void *arg, struct ctl_id targ_id)
1436 {
1437
1438         return (0);
1439 }
1440
1441 static int
1442 cfiscsi_targ_disable(void *arg, struct ctl_id targ_id)
1443 {
1444
1445         return (0);
1446 }
1447
1448 static void
1449 cfiscsi_ioctl_handoff(struct ctl_iscsi *ci)
1450 {
1451         struct cfiscsi_softc *softc;
1452         struct cfiscsi_session *cs;
1453         struct cfiscsi_target *ct;
1454         struct ctl_iscsi_handoff_params *cihp;
1455         int error;
1456
1457         cihp = (struct ctl_iscsi_handoff_params *)&(ci->data);
1458         softc = &cfiscsi_softc;
1459
1460         CFISCSI_DEBUG("new connection from %s (%s) to %s",
1461             cihp->initiator_name, cihp->initiator_addr,
1462             cihp->target_name);
1463
1464         if (softc->online == 0) {
1465                 ci->status = CTL_ISCSI_ERROR;
1466                 snprintf(ci->error_str, sizeof(ci->error_str),
1467                     "%s: port offline", __func__);
1468                 return;
1469         }
1470
1471         ct = cfiscsi_target_find(softc, cihp->target_name);
1472         if (ct == NULL) {
1473                 ci->status = CTL_ISCSI_ERROR;
1474                 snprintf(ci->error_str, sizeof(ci->error_str),
1475                     "%s: target not found", __func__);
1476                 return;
1477         }
1478
1479 #ifdef ICL_KERNEL_PROXY
1480         if (cihp->socket > 0 && cihp->connection_id > 0) {
1481                 snprintf(ci->error_str, sizeof(ci->error_str),
1482                     "both socket and connection_id set");
1483                 ci->status = CTL_ISCSI_ERROR;
1484                 cfiscsi_target_release(ct);
1485                 return;
1486         }
1487         if (cihp->socket == 0) {
1488                 mtx_lock(&cfiscsi_softc.lock);
1489                 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1490                         if (cs->cs_id == cihp->socket)
1491                                 break;
1492                 }
1493                 if (cs == NULL) {
1494                         mtx_unlock(&cfiscsi_softc.lock);
1495                         snprintf(ci->error_str, sizeof(ci->error_str),
1496                             "connection not found");
1497                         ci->status = CTL_ISCSI_ERROR;
1498                         cfiscsi_target_release(ct);
1499                         return;
1500                 }
1501                 mtx_unlock(&cfiscsi_softc.lock);
1502         } else {
1503 #endif
1504                 cs = cfiscsi_session_new(softc);
1505                 if (cs == NULL) {
1506                         ci->status = CTL_ISCSI_ERROR;
1507                         snprintf(ci->error_str, sizeof(ci->error_str),
1508                             "%s: cfiscsi_session_new failed", __func__);
1509                         cfiscsi_target_release(ct);
1510                         return;
1511                 }
1512 #ifdef ICL_KERNEL_PROXY
1513         }
1514 #endif
1515         cs->cs_target = ct;
1516
1517         /*
1518          * First PDU of Full Feature phase has the same CmdSN as the last
1519          * PDU from the Login Phase received from the initiator.  Thus,
1520          * the -1 below.
1521          */
1522         cs->cs_portal_group_tag = cihp->portal_group_tag;
1523         cs->cs_cmdsn = cihp->cmdsn;
1524         cs->cs_statsn = cihp->statsn;
1525         cs->cs_max_data_segment_length = cihp->max_recv_data_segment_length;
1526         cs->cs_max_burst_length = cihp->max_burst_length;
1527         cs->cs_immediate_data = !!cihp->immediate_data;
1528         if (cihp->header_digest == CTL_ISCSI_DIGEST_CRC32C)
1529                 cs->cs_conn->ic_header_crc32c = true;
1530         if (cihp->data_digest == CTL_ISCSI_DIGEST_CRC32C)
1531                 cs->cs_conn->ic_data_crc32c = true;
1532
1533         strlcpy(cs->cs_initiator_name,
1534             cihp->initiator_name, sizeof(cs->cs_initiator_name));
1535         strlcpy(cs->cs_initiator_addr,
1536             cihp->initiator_addr, sizeof(cs->cs_initiator_addr));
1537         strlcpy(cs->cs_initiator_alias,
1538             cihp->initiator_alias, sizeof(cs->cs_initiator_alias));
1539
1540 #ifdef ICL_KERNEL_PROXY
1541         if (cihp->socket > 0) {
1542 #endif
1543                 error = icl_conn_handoff(cs->cs_conn, cihp->socket);
1544                 if (error != 0) {
1545                         cfiscsi_session_delete(cs);
1546                         ci->status = CTL_ISCSI_ERROR;
1547                         snprintf(ci->error_str, sizeof(ci->error_str),
1548                             "%s: icl_conn_handoff failed with error %d",
1549                             __func__, error);
1550                         return;
1551                 }
1552 #ifdef ICL_KERNEL_PROXY
1553         }
1554 #endif
1555
1556         /*
1557          * Register initiator with CTL.
1558          */
1559         cfiscsi_session_register_initiator(cs);
1560
1561 #ifdef ICL_KERNEL_PROXY
1562         cs->cs_login_phase = false;
1563
1564         /*
1565          * First PDU of the Full Feature phase has likely already arrived.
1566          * We have to pick it up and execute properly.
1567          */
1568         if (cs->cs_login_pdu != NULL) {
1569                 CFISCSI_SESSION_DEBUG(cs, "picking up first PDU");
1570                 cfiscsi_pdu_handle(cs->cs_login_pdu);
1571                 cs->cs_login_pdu = NULL;
1572         }
1573 #endif
1574
1575         ci->status = CTL_ISCSI_OK;
1576 }
1577
1578 static void
1579 cfiscsi_ioctl_list(struct ctl_iscsi *ci)
1580 {
1581         struct ctl_iscsi_list_params *cilp;
1582         struct cfiscsi_session *cs;
1583         struct cfiscsi_softc *softc;
1584         struct sbuf *sb;
1585         int error;
1586
1587         cilp = (struct ctl_iscsi_list_params *)&(ci->data);
1588         softc = &cfiscsi_softc;
1589
1590         sb = sbuf_new(NULL, NULL, cilp->alloc_len, SBUF_FIXEDLEN);
1591         if (sb == NULL) {
1592                 ci->status = CTL_ISCSI_ERROR;
1593                 snprintf(ci->error_str, sizeof(ci->error_str),
1594                     "Unable to allocate %d bytes for iSCSI session list",
1595                     cilp->alloc_len);
1596                 return;
1597         }
1598
1599         sbuf_printf(sb, "<ctlislist>\n");
1600         mtx_lock(&softc->lock);
1601         TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1602 #ifdef ICL_KERNEL_PROXY
1603                 if (cs->cs_target == NULL)
1604                         continue;
1605 #endif
1606                 error = sbuf_printf(sb, "<connection id=\"%d\">"
1607                     "<initiator>%s</initiator>"
1608                     "<initiator_addr>%s</initiator_addr>"
1609                     "<initiator_alias>%s</initiator_alias>"
1610                     "<target>%s</target>"
1611                     "<target_alias>%s</target_alias>"
1612                     "<header_digest>%s</header_digest>"
1613                     "<data_digest>%s</data_digest>"
1614                     "<max_data_segment_length>%zd</max_data_segment_length>"
1615                     "<immediate_data>%d</immediate_data>"
1616                     "<iser>%d</iser>"
1617                     "</connection>\n",
1618                     cs->cs_id,
1619                     cs->cs_initiator_name, cs->cs_initiator_addr, cs->cs_initiator_alias,
1620                     cs->cs_target->ct_name, cs->cs_target->ct_alias,
1621                     cs->cs_conn->ic_header_crc32c ? "CRC32C" : "None",
1622                     cs->cs_conn->ic_data_crc32c ? "CRC32C" : "None",
1623                     cs->cs_max_data_segment_length,
1624                     cs->cs_immediate_data,
1625                     cs->cs_conn->ic_iser);
1626                 if (error != 0)
1627                         break;
1628         }
1629         mtx_unlock(&softc->lock);
1630         error = sbuf_printf(sb, "</ctlislist>\n");
1631         if (error != 0) {
1632                 sbuf_delete(sb);
1633                 ci->status = CTL_ISCSI_LIST_NEED_MORE_SPACE;
1634                 snprintf(ci->error_str, sizeof(ci->error_str),
1635                     "Out of space, %d bytes is too small", cilp->alloc_len);
1636                 return;
1637         }
1638         sbuf_finish(sb);
1639
1640         error = copyout(sbuf_data(sb), cilp->conn_xml, sbuf_len(sb) + 1);
1641         cilp->fill_len = sbuf_len(sb) + 1;
1642         ci->status = CTL_ISCSI_OK;
1643         sbuf_delete(sb);
1644 }
1645
1646 static void
1647 cfiscsi_ioctl_terminate(struct ctl_iscsi *ci)
1648 {
1649         struct icl_pdu *response;
1650         struct iscsi_bhs_asynchronous_message *bhsam;
1651         struct ctl_iscsi_terminate_params *citp;
1652         struct cfiscsi_session *cs;
1653         struct cfiscsi_softc *softc;
1654         int found = 0;
1655
1656         citp = (struct ctl_iscsi_terminate_params *)&(ci->data);
1657         softc = &cfiscsi_softc;
1658
1659         mtx_lock(&softc->lock);
1660         TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1661                 if (citp->all == 0 && cs->cs_id != citp->connection_id &&
1662                     strcmp(cs->cs_initiator_name, citp->initiator_name) != 0 &&
1663                     strcmp(cs->cs_initiator_addr, citp->initiator_addr) != 0)
1664                         continue;
1665
1666                 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT);
1667                 if (response == NULL) {
1668                         /*
1669                          * Oh well.  Just terminate the connection.
1670                          */
1671                 } else {
1672                         bhsam = (struct iscsi_bhs_asynchronous_message *)
1673                             response->ip_bhs;
1674                         bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE;
1675                         bhsam->bhsam_flags = 0x80;
1676                         bhsam->bhsam_0xffffffff = 0xffffffff;
1677                         bhsam->bhsam_async_event =
1678                             BHSAM_EVENT_TARGET_TERMINATES_SESSION;
1679                         cfiscsi_pdu_queue(response);
1680                 }
1681                 cfiscsi_session_terminate(cs);
1682                 found++;
1683         }
1684         mtx_unlock(&softc->lock);
1685
1686         if (found == 0) {
1687                 ci->status = CTL_ISCSI_SESSION_NOT_FOUND;
1688                 snprintf(ci->error_str, sizeof(ci->error_str),
1689                     "No matching connections found");
1690                 return;
1691         }
1692
1693         ci->status = CTL_ISCSI_OK;
1694 }
1695
1696 static void
1697 cfiscsi_ioctl_logout(struct ctl_iscsi *ci)
1698 {
1699         struct icl_pdu *response;
1700         struct iscsi_bhs_asynchronous_message *bhsam;
1701         struct ctl_iscsi_logout_params *cilp;
1702         struct cfiscsi_session *cs;
1703         struct cfiscsi_softc *softc;
1704         int found = 0;
1705
1706         cilp = (struct ctl_iscsi_logout_params *)&(ci->data);
1707         softc = &cfiscsi_softc;
1708
1709         mtx_lock(&softc->lock);
1710         TAILQ_FOREACH(cs, &softc->sessions, cs_next) {
1711                 if (cilp->all == 0 && cs->cs_id != cilp->connection_id &&
1712                     strcmp(cs->cs_initiator_name, cilp->initiator_name) != 0 &&
1713                     strcmp(cs->cs_initiator_addr, cilp->initiator_addr) != 0)
1714                         continue;
1715
1716                 response = icl_pdu_new_bhs(cs->cs_conn, M_NOWAIT);
1717                 if (response == NULL) {
1718                         ci->status = CTL_ISCSI_ERROR;
1719                         snprintf(ci->error_str, sizeof(ci->error_str),
1720                             "Unable to allocate memory");
1721                         mtx_unlock(&softc->lock);
1722                         return;
1723                 }
1724                 bhsam =
1725                     (struct iscsi_bhs_asynchronous_message *)response->ip_bhs;
1726                 bhsam->bhsam_opcode = ISCSI_BHS_OPCODE_ASYNC_MESSAGE;
1727                 bhsam->bhsam_flags = 0x80;
1728                 bhsam->bhsam_async_event = BHSAM_EVENT_TARGET_REQUESTS_LOGOUT;
1729                 bhsam->bhsam_parameter3 = htons(10);
1730                 cfiscsi_pdu_queue(response);
1731                 found++;
1732         }
1733         mtx_unlock(&softc->lock);
1734
1735         if (found == 0) {
1736                 ci->status = CTL_ISCSI_SESSION_NOT_FOUND;
1737                 snprintf(ci->error_str, sizeof(ci->error_str),
1738                     "No matching connections found");
1739                 return;
1740         }
1741
1742         ci->status = CTL_ISCSI_OK;
1743 }
1744
1745 #ifdef ICL_KERNEL_PROXY
1746 static void
1747 cfiscsi_ioctl_listen(struct ctl_iscsi *ci)
1748 {
1749         struct ctl_iscsi_listen_params *cilp;
1750         struct sockaddr *sa;
1751         int error;
1752
1753         cilp = (struct ctl_iscsi_listen_params *)&(ci->data);
1754
1755         if (cfiscsi_softc.listener == NULL) {
1756                 CFISCSI_DEBUG("no listener");
1757                 snprintf(ci->error_str, sizeof(ci->error_str), "no listener");
1758                 ci->status = CTL_ISCSI_ERROR;
1759                 return;
1760         }
1761
1762         error = getsockaddr(&sa, (void *)cilp->addr, cilp->addrlen);
1763         if (error != 0) {
1764                 CFISCSI_DEBUG("getsockaddr, error %d", error);
1765                 snprintf(ci->error_str, sizeof(ci->error_str), "getsockaddr failed");
1766                 ci->status = CTL_ISCSI_ERROR;
1767                 return;
1768         }
1769
1770         error = icl_listen_add(cfiscsi_softc.listener, cilp->iser, cilp->domain,
1771             cilp->socktype, cilp->protocol, sa, cilp->portal_id);
1772         if (error != 0) {
1773                 free(sa, M_SONAME);
1774                 CFISCSI_DEBUG("icl_listen_add, error %d", error);
1775                 snprintf(ci->error_str, sizeof(ci->error_str),
1776                     "icl_listen_add failed, error %d", error);
1777                 ci->status = CTL_ISCSI_ERROR;
1778                 return;
1779         }
1780
1781         ci->status = CTL_ISCSI_OK;
1782 }
1783
1784 static void
1785 cfiscsi_ioctl_accept(struct ctl_iscsi *ci)
1786 {
1787         struct ctl_iscsi_accept_params *ciap;
1788         struct cfiscsi_session *cs;
1789         int error;
1790
1791         ciap = (struct ctl_iscsi_accept_params *)&(ci->data);
1792
1793         mtx_lock(&cfiscsi_softc.lock);
1794         for (;;) {
1795                 TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1796                         if (cs->cs_waiting_for_ctld)
1797                                 break;
1798                 }
1799                 if (cs != NULL)
1800                         break;
1801                 error = cv_wait_sig(&cfiscsi_softc.accept_cv, &cfiscsi_softc.lock);
1802                 if (error != 0) {
1803                         mtx_unlock(&cfiscsi_softc.lock);
1804                         snprintf(ci->error_str, sizeof(ci->error_str), "interrupted");
1805                         ci->status = CTL_ISCSI_ERROR;
1806                         return;
1807                 }
1808         }
1809         mtx_unlock(&cfiscsi_softc.lock);
1810
1811         cs->cs_waiting_for_ctld = false;
1812         cs->cs_login_phase = true;
1813
1814         ciap->connection_id = cs->cs_id;
1815         ciap->portal_id = cs->cs_portal_id;
1816         ciap->initiator_addrlen = cs->cs_initiator_sa->sa_len;
1817         error = copyout(cs->cs_initiator_sa, ciap->initiator_addr,
1818             cs->cs_initiator_sa->sa_len);
1819         if (error != 0) {
1820                 snprintf(ci->error_str, sizeof(ci->error_str),
1821                     "copyout failed with error %d", error);
1822                 ci->status = CTL_ISCSI_ERROR;
1823                 return;
1824         }
1825
1826         ci->status = CTL_ISCSI_OK;
1827 }
1828
1829 static void
1830 cfiscsi_ioctl_send(struct ctl_iscsi *ci)
1831 {
1832         struct ctl_iscsi_send_params *cisp;
1833         struct cfiscsi_session *cs;
1834         struct icl_pdu *ip;
1835         size_t datalen;
1836         void *data;
1837         int error;
1838
1839         cisp = (struct ctl_iscsi_send_params *)&(ci->data);
1840
1841         mtx_lock(&cfiscsi_softc.lock);
1842         TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1843                 if (cs->cs_id == cisp->connection_id)
1844                         break;
1845         }
1846         if (cs == NULL) {
1847                 mtx_unlock(&cfiscsi_softc.lock);
1848                 snprintf(ci->error_str, sizeof(ci->error_str), "connection not found");
1849                 ci->status = CTL_ISCSI_ERROR;
1850                 return;
1851         }
1852         mtx_unlock(&cfiscsi_softc.lock);
1853
1854 #if 0
1855         if (cs->cs_login_phase == false)
1856                 return (EBUSY);
1857 #endif
1858
1859         if (cs->cs_terminating) {
1860                 snprintf(ci->error_str, sizeof(ci->error_str), "connection is terminating");
1861                 ci->status = CTL_ISCSI_ERROR;
1862                 return;
1863         }
1864
1865         datalen = cisp->data_segment_len;
1866         /*
1867          * XXX
1868          */
1869         //if (datalen > CFISCSI_MAX_DATA_SEGMENT_LENGTH) {
1870         if (datalen > 65535) {
1871                 snprintf(ci->error_str, sizeof(ci->error_str), "data segment too big");
1872                 ci->status = CTL_ISCSI_ERROR;
1873                 return;
1874         }
1875         if (datalen > 0) {
1876                 data = malloc(datalen, M_CFISCSI, M_WAITOK);
1877                 error = copyin(cisp->data_segment, data, datalen);
1878                 if (error != 0) {
1879                         free(data, M_CFISCSI);
1880                         snprintf(ci->error_str, sizeof(ci->error_str), "copyin error %d", error);
1881                         ci->status = CTL_ISCSI_ERROR;
1882                         return;
1883                 }
1884         }
1885
1886         ip = icl_pdu_new_bhs(cs->cs_conn, M_WAITOK);
1887         memcpy(ip->ip_bhs, cisp->bhs, sizeof(*ip->ip_bhs));
1888         if (datalen > 0) {
1889                 icl_pdu_append_data(ip, data, datalen, M_WAITOK);
1890                 free(data, M_CFISCSI);
1891         }
1892         CFISCSI_SESSION_LOCK(cs);
1893         icl_pdu_queue(ip);
1894         CFISCSI_SESSION_UNLOCK(cs);
1895         ci->status = CTL_ISCSI_OK;
1896 }
1897
1898 static void
1899 cfiscsi_ioctl_receive(struct ctl_iscsi *ci)
1900 {
1901         struct ctl_iscsi_receive_params *cirp;
1902         struct cfiscsi_session *cs;
1903         struct icl_pdu *ip;
1904         void *data;
1905         int error;
1906
1907         cirp = (struct ctl_iscsi_receive_params *)&(ci->data);
1908
1909         mtx_lock(&cfiscsi_softc.lock);
1910         TAILQ_FOREACH(cs, &cfiscsi_softc.sessions, cs_next) {
1911                 if (cs->cs_id == cirp->connection_id)
1912                         break;
1913         }
1914         if (cs == NULL) {
1915                 mtx_unlock(&cfiscsi_softc.lock);
1916                 snprintf(ci->error_str, sizeof(ci->error_str),
1917                     "connection not found");
1918                 ci->status = CTL_ISCSI_ERROR;
1919                 return;
1920         }
1921         mtx_unlock(&cfiscsi_softc.lock);
1922
1923 #if 0
1924         if (is->is_login_phase == false)
1925                 return (EBUSY);
1926 #endif
1927
1928         CFISCSI_SESSION_LOCK(cs);
1929         while (cs->cs_login_pdu == NULL && cs->cs_terminating == false) {
1930                 error = cv_wait_sig(&cs->cs_login_cv, &cs->cs_lock);
1931                 if (error != 0) {
1932                         CFISCSI_SESSION_UNLOCK(cs);
1933                         snprintf(ci->error_str, sizeof(ci->error_str),
1934                             "interrupted by signal");
1935                         ci->status = CTL_ISCSI_ERROR;
1936                         return;
1937                 }
1938         }
1939
1940         if (cs->cs_terminating) {
1941                 CFISCSI_SESSION_UNLOCK(cs);
1942                 snprintf(ci->error_str, sizeof(ci->error_str),
1943                     "connection terminating");
1944                 ci->status = CTL_ISCSI_ERROR;
1945                 return;
1946         }
1947         ip = cs->cs_login_pdu;
1948         cs->cs_login_pdu = NULL;
1949         CFISCSI_SESSION_UNLOCK(cs);
1950
1951         if (ip->ip_data_len > cirp->data_segment_len) {
1952                 icl_pdu_free(ip);
1953                 snprintf(ci->error_str, sizeof(ci->error_str),
1954                     "data segment too big");
1955                 ci->status = CTL_ISCSI_ERROR;
1956                 return;
1957         }
1958
1959         copyout(ip->ip_bhs, cirp->bhs, sizeof(*ip->ip_bhs));
1960         if (ip->ip_data_len > 0) {
1961                 data = malloc(ip->ip_data_len, M_CFISCSI, M_WAITOK);
1962                 icl_pdu_get_data(ip, 0, data, ip->ip_data_len);
1963                 copyout(data, cirp->data_segment, ip->ip_data_len);
1964                 free(data, M_CFISCSI);
1965         }
1966
1967         icl_pdu_free(ip);
1968         ci->status = CTL_ISCSI_OK;
1969 }
1970
1971 #endif /* !ICL_KERNEL_PROXY */
1972
1973 static int
1974 cfiscsi_ioctl(struct cdev *dev,
1975     u_long cmd, caddr_t addr, int flag, struct thread *td)
1976 {
1977         struct ctl_iscsi *ci;
1978
1979         if (cmd != CTL_ISCSI)
1980                 return (ENOTTY);
1981
1982         ci = (struct ctl_iscsi *)addr;
1983         switch (ci->type) {
1984         case CTL_ISCSI_HANDOFF:
1985                 cfiscsi_ioctl_handoff(ci);
1986                 break;
1987         case CTL_ISCSI_LIST:
1988                 cfiscsi_ioctl_list(ci);
1989                 break;
1990         case CTL_ISCSI_TERMINATE:
1991                 cfiscsi_ioctl_terminate(ci);
1992                 break;
1993         case CTL_ISCSI_LOGOUT:
1994                 cfiscsi_ioctl_logout(ci);
1995                 break;
1996 #ifdef ICL_KERNEL_PROXY
1997         case CTL_ISCSI_LISTEN:
1998                 cfiscsi_ioctl_listen(ci);
1999                 break;
2000         case CTL_ISCSI_ACCEPT:
2001                 cfiscsi_ioctl_accept(ci);
2002                 break;
2003         case CTL_ISCSI_SEND:
2004                 cfiscsi_ioctl_send(ci);
2005                 break;
2006         case CTL_ISCSI_RECEIVE:
2007                 cfiscsi_ioctl_receive(ci);
2008                 break;
2009 #else
2010         case CTL_ISCSI_LISTEN:
2011         case CTL_ISCSI_ACCEPT:
2012         case CTL_ISCSI_SEND:
2013         case CTL_ISCSI_RECEIVE:
2014                 ci->status = CTL_ISCSI_ERROR;
2015                 snprintf(ci->error_str, sizeof(ci->error_str),
2016                     "%s: CTL compiled without ICL_KERNEL_PROXY",
2017                     __func__);
2018                 break;
2019 #endif /* !ICL_KERNEL_PROXY */
2020         default:
2021                 ci->status = CTL_ISCSI_ERROR;
2022                 snprintf(ci->error_str, sizeof(ci->error_str),
2023                     "%s: invalid iSCSI request type %d", __func__, ci->type);
2024                 break;
2025         }
2026
2027         return (0);
2028 }
2029
2030 static int
2031 cfiscsi_devid(struct ctl_scsiio *ctsio, int alloc_len)
2032 {
2033         struct cfiscsi_session *cs;
2034         struct scsi_vpd_device_id *devid_ptr;
2035         struct scsi_vpd_id_descriptor *desc, *desc1;
2036         struct scsi_vpd_id_descriptor *desc2, *desc3; /* for types 4h and 5h */
2037         struct scsi_vpd_id_t10 *t10id;
2038         struct ctl_lun *lun;
2039         const struct icl_pdu *request;
2040         char *val;
2041         size_t devid_len, wwpn_len;
2042
2043         lun = (struct ctl_lun *)ctsio->io_hdr.ctl_private[CTL_PRIV_LUN].ptr;
2044         request = ctsio->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2045         cs = PDU_SESSION(request);
2046
2047         wwpn_len = strlen(cs->cs_target->ct_name);
2048         wwpn_len += strlen(",t,0x0001");
2049         wwpn_len += 1; /* '\0' */
2050         if ((wwpn_len % 4) != 0)
2051                 wwpn_len += (4 - (wwpn_len % 4));
2052
2053         devid_len = sizeof(struct scsi_vpd_device_id) +
2054                 sizeof(struct scsi_vpd_id_descriptor) +
2055                 sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN +
2056                 sizeof(struct scsi_vpd_id_descriptor) + wwpn_len +
2057                 sizeof(struct scsi_vpd_id_descriptor) +
2058                 sizeof(struct scsi_vpd_id_rel_trgt_port_id) +
2059                 sizeof(struct scsi_vpd_id_descriptor) +
2060                 sizeof(struct scsi_vpd_id_trgt_port_grp_id);
2061
2062         ctsio->kern_data_ptr = malloc(devid_len, M_CTL, M_WAITOK | M_ZERO);
2063         devid_ptr = (struct scsi_vpd_device_id *)ctsio->kern_data_ptr;
2064         ctsio->kern_sg_entries = 0;
2065
2066         if (devid_len < alloc_len) {
2067                 ctsio->residual = alloc_len - devid_len;
2068                 ctsio->kern_data_len = devid_len;
2069                 ctsio->kern_total_len = devid_len;
2070         } else {
2071                 ctsio->residual = 0;
2072                 ctsio->kern_data_len = alloc_len;
2073                 ctsio->kern_total_len = alloc_len;
2074         }
2075         ctsio->kern_data_resid = 0;
2076         ctsio->kern_rel_offset = 0;
2077         ctsio->kern_sg_entries = 0;
2078
2079         desc = (struct scsi_vpd_id_descriptor *)devid_ptr->desc_list;
2080         t10id = (struct scsi_vpd_id_t10 *)&desc->identifier[0];
2081         desc1 = (struct scsi_vpd_id_descriptor *)(&desc->identifier[0] +
2082             sizeof(struct scsi_vpd_id_t10) + CTL_DEVID_LEN);
2083         desc2 = (struct scsi_vpd_id_descriptor *)(&desc1->identifier[0] +
2084             wwpn_len);
2085         desc3 = (struct scsi_vpd_id_descriptor *)(&desc2->identifier[0] +
2086             sizeof(struct scsi_vpd_id_rel_trgt_port_id));
2087
2088         if (lun != NULL)
2089                 devid_ptr->device = (SID_QUAL_LU_CONNECTED << 5) |
2090                     lun->be_lun->lun_type;
2091         else
2092                 devid_ptr->device = (SID_QUAL_LU_OFFLINE << 5) | T_DIRECT;
2093
2094         devid_ptr->page_code = SVPD_DEVICE_ID;
2095
2096         scsi_ulto2b(devid_len - 4, devid_ptr->length);
2097
2098         /*
2099          * We're using a LUN association here.  i.e., this device ID is a
2100          * per-LUN identifier.
2101          */
2102         desc->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_ASCII;
2103         desc->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_LUN | SVPD_ID_TYPE_T10;
2104         desc->length = sizeof(*t10id) + CTL_DEVID_LEN;
2105         if (lun == NULL || (val = ctl_get_opt(lun->be_lun, "vendor")) == NULL) {
2106                 strncpy((char *)t10id->vendor, CTL_VENDOR, sizeof(t10id->vendor));
2107         } else {
2108                 memset(t10id->vendor, ' ', sizeof(t10id->vendor));
2109                 strncpy(t10id->vendor, val,
2110                     min(sizeof(t10id->vendor), strlen(val)));
2111         }
2112
2113         /*
2114          * If we've actually got a backend, copy the device id from the
2115          * per-LUN data.  Otherwise, set it to all spaces.
2116          */
2117         if (lun != NULL) {
2118                 /*
2119                  * Copy the backend's LUN ID.
2120                  */
2121                 strncpy((char *)t10id->vendor_spec_id,
2122                     (char *)lun->be_lun->device_id, CTL_DEVID_LEN);
2123         } else {
2124                 /*
2125                  * No backend, set this to spaces.
2126                  */
2127                 memset(t10id->vendor_spec_id, 0x20, CTL_DEVID_LEN);
2128         }
2129
2130         /*
2131          * desc1 is for the WWPN which is a port asscociation.
2132          */
2133         desc1->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_UTF8;
2134         desc1->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT |
2135             SVPD_ID_TYPE_SCSI_NAME;
2136         desc1->length = wwpn_len;
2137         snprintf(desc1->identifier, wwpn_len, "%s,t,0x%4.4x",
2138             cs->cs_target->ct_name, cs->cs_portal_group_tag);
2139
2140         /*
2141          * desc2 is for the Relative Target Port(type 4h) identifier
2142          */
2143         desc2->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY;
2144         desc2->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT |
2145             SVPD_ID_TYPE_RELTARG;
2146         desc2->length = 4;
2147         desc2->identifier[3] = 1;
2148
2149         /*
2150          * desc3 is for the Target Port Group(type 5h) identifier
2151          */
2152         desc3->proto_codeset = (SCSI_PROTO_ISCSI << 4) | SVPD_ID_CODESET_BINARY;
2153         desc3->id_type = SVPD_ID_PIV | SVPD_ID_ASSOC_PORT |
2154             SVPD_ID_TYPE_TPORTGRP;
2155         desc3->length = 4;
2156         desc3->identifier[3] = 1;
2157
2158         ctsio->scsi_status = SCSI_STATUS_OK;
2159
2160         ctsio->be_move_done = ctl_config_move_done;
2161         ctl_datamove((union ctl_io *)ctsio);
2162
2163         return (CTL_RETVAL_COMPLETE);
2164 }
2165
2166 static void
2167 cfiscsi_target_hold(struct cfiscsi_target *ct)
2168 {
2169
2170         refcount_acquire(&ct->ct_refcount);
2171 }
2172
2173 static void
2174 cfiscsi_target_release(struct cfiscsi_target *ct)
2175 {
2176         struct cfiscsi_softc *softc;
2177
2178         softc = ct->ct_softc;
2179         mtx_lock(&softc->lock);
2180         if (refcount_release(&ct->ct_refcount)) {
2181                 TAILQ_REMOVE(&softc->targets, ct, ct_next);
2182                 mtx_unlock(&softc->lock);
2183                 free(ct, M_CFISCSI);
2184
2185                 return;
2186         }
2187         mtx_unlock(&softc->lock);
2188 }
2189
2190 static struct cfiscsi_target *
2191 cfiscsi_target_find(struct cfiscsi_softc *softc, const char *name)
2192 {
2193         struct cfiscsi_target *ct;
2194
2195         mtx_lock(&softc->lock);
2196         TAILQ_FOREACH(ct, &softc->targets, ct_next) {
2197                 if (strcmp(name, ct->ct_name) != 0)
2198                         continue;
2199                 cfiscsi_target_hold(ct);
2200                 mtx_unlock(&softc->lock);
2201                 return (ct);
2202         }
2203         mtx_unlock(&softc->lock);
2204
2205         return (NULL);
2206 }
2207
2208 static struct cfiscsi_target *
2209 cfiscsi_target_find_or_create(struct cfiscsi_softc *softc, const char *name,
2210     const char *alias)
2211 {
2212         struct cfiscsi_target *ct, *newct;
2213         int i;
2214
2215         if (name[0] == '\0' || strlen(name) >= CTL_ISCSI_NAME_LEN)
2216                 return (NULL);
2217
2218         newct = malloc(sizeof(*newct), M_CFISCSI, M_WAITOK | M_ZERO);
2219
2220         mtx_lock(&softc->lock);
2221         TAILQ_FOREACH(ct, &softc->targets, ct_next) {
2222                 if (strcmp(name, ct->ct_name) != 0)
2223                         continue;
2224                 cfiscsi_target_hold(ct);
2225                 mtx_unlock(&softc->lock);
2226                 free(newct, M_CFISCSI);
2227                 return (ct);
2228         }
2229
2230         for (i = 0; i < CTL_MAX_LUNS; i++)
2231                 newct->ct_luns[i] = -1;
2232
2233         strlcpy(newct->ct_name, name, sizeof(newct->ct_name));
2234         if (alias != NULL)
2235                 strlcpy(newct->ct_alias, alias, sizeof(newct->ct_alias));
2236         refcount_init(&newct->ct_refcount, 1);
2237         newct->ct_softc = softc;
2238         TAILQ_INSERT_TAIL(&softc->targets, newct, ct_next);
2239         mtx_unlock(&softc->lock);
2240
2241         return (newct);
2242 }
2243
2244 /*
2245  * Takes LUN from the target space and returns LUN from the CTL space.
2246  */
2247 static uint32_t
2248 cfiscsi_map_lun(void *arg, uint32_t lun)
2249 {
2250         struct cfiscsi_session *cs;
2251
2252         cs = arg;
2253
2254         if (lun >= CTL_MAX_LUNS) {
2255                 CFISCSI_DEBUG("requested lun number %d is higher "
2256                     "than maximum %d", lun, CTL_MAX_LUNS - 1);
2257                 return (0xffffffff);
2258         }
2259
2260         if (cs->cs_target->ct_luns[lun] < 0)
2261                 return (0xffffffff);
2262
2263         return (cs->cs_target->ct_luns[lun]);
2264 }
2265
2266 static int
2267 cfiscsi_target_set_lun(struct cfiscsi_target *ct,
2268     unsigned long lun_id, unsigned long ctl_lun_id)
2269 {
2270
2271         if (lun_id >= CTL_MAX_LUNS) {
2272                 CFISCSI_WARN("requested lun number %ld is higher "
2273                     "than maximum %d", lun_id, CTL_MAX_LUNS - 1);
2274                 return (-1);
2275         }
2276
2277         if (ct->ct_luns[lun_id] >= 0) {
2278                 /*
2279                  * CTL calls cfiscsi_lun_enable() twice for each LUN - once
2280                  * when the LUN is created, and a second time just before
2281                  * the port is brought online; don't emit warnings
2282                  * for that case.
2283                  */
2284                 if (ct->ct_luns[lun_id] == ctl_lun_id)
2285                         return (0);
2286                 CFISCSI_WARN("lun %ld already allocated", lun_id);
2287                 return (-1);
2288         }
2289
2290 #if 0
2291         CFISCSI_DEBUG("adding mapping for lun %ld, target %s "
2292             "to ctl lun %ld", lun_id, ct->ct_name, ctl_lun_id);
2293 #endif
2294
2295         ct->ct_luns[lun_id] = ctl_lun_id;
2296         cfiscsi_target_hold(ct);
2297
2298         return (0);
2299 }
2300
2301 static int
2302 cfiscsi_target_unset_lun(struct cfiscsi_target *ct, unsigned long lun_id)
2303 {
2304
2305         if (ct->ct_luns[lun_id] < 0) {
2306                 CFISCSI_WARN("lun %ld not allocated", lun_id);
2307                 return (-1);
2308         }
2309
2310         ct->ct_luns[lun_id] = -1;
2311         cfiscsi_target_release(ct);
2312
2313         return (0);
2314 }
2315
2316 static int
2317 cfiscsi_lun_enable(void *arg, struct ctl_id target_id, int lun_id)
2318 {
2319         struct cfiscsi_softc *softc;
2320         struct cfiscsi_target *ct;
2321         const char *target = NULL, *target_alias = NULL;
2322         const char *lun = NULL;
2323         unsigned long tmp;
2324
2325         softc = (struct cfiscsi_softc *)arg;
2326
2327         target = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun,
2328             "cfiscsi_target");
2329         target_alias = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun,
2330             "cfiscsi_target_alias");
2331         lun = ctl_get_opt(control_softc->ctl_luns[lun_id]->be_lun,
2332             "cfiscsi_lun");
2333
2334         if (target == NULL && lun == NULL)
2335                 return (0);
2336
2337         if (target == NULL || lun == NULL) {
2338                 CFISCSI_WARN("lun added with cfiscsi_target, but without "
2339                     "cfiscsi_lun, or the other way around; ignoring");
2340                 return (0);
2341         }
2342
2343         ct = cfiscsi_target_find_or_create(softc, target, target_alias);
2344         if (ct == NULL) {
2345                 CFISCSI_WARN("failed to create target \"%s\"", target);
2346                 return (0);
2347         }
2348
2349         tmp = strtoul(lun, NULL, 10);
2350         cfiscsi_target_set_lun(ct, tmp, lun_id);
2351         cfiscsi_target_release(ct);
2352         return (0);
2353 }
2354
2355 static int
2356 cfiscsi_lun_disable(void *arg, struct ctl_id target_id, int lun_id)
2357 {
2358         struct cfiscsi_softc *softc;
2359         struct cfiscsi_target *ct;
2360         int i;
2361
2362         softc = (struct cfiscsi_softc *)arg;
2363
2364         mtx_lock(&softc->lock);
2365         TAILQ_FOREACH(ct, &softc->targets, ct_next) {
2366                 for (i = 0; i < CTL_MAX_LUNS; i++) {
2367                         if (ct->ct_luns[i] < 0)
2368                                 continue;
2369                         if (ct->ct_luns[i] != lun_id)
2370                                 continue;
2371                         mtx_unlock(&softc->lock);
2372                         cfiscsi_target_unset_lun(ct, i);
2373                         return (0);
2374                 }
2375         }
2376         mtx_unlock(&softc->lock);
2377         return (0);
2378 }
2379
2380 static void
2381 cfiscsi_datamove_in(union ctl_io *io)
2382 {
2383         struct cfiscsi_session *cs;
2384         struct icl_pdu *request, *response;
2385         const struct iscsi_bhs_scsi_command *bhssc;
2386         struct iscsi_bhs_data_in *bhsdi;
2387         struct ctl_sg_entry ctl_sg_entry, *ctl_sglist;
2388         size_t len, expected_len, sg_len, buffer_offset;
2389         const char *sg_addr;
2390         int ctl_sg_count, error, i;
2391
2392         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2393         cs = PDU_SESSION(request);
2394
2395         bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs;
2396         KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2397             ISCSI_BHS_OPCODE_SCSI_COMMAND,
2398             ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND"));
2399
2400         if (io->scsiio.kern_sg_entries > 0) {
2401                 ctl_sglist = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr;
2402                 ctl_sg_count = io->scsiio.kern_sg_entries;
2403         } else {
2404                 ctl_sglist = &ctl_sg_entry;
2405                 ctl_sglist->addr = io->scsiio.kern_data_ptr;
2406                 ctl_sglist->len = io->scsiio.kern_data_len;
2407                 ctl_sg_count = 1;
2408         }
2409
2410         /*
2411          * This is the total amount of data to be transferred within the current
2412          * SCSI command.  We need to record it so that we can properly report
2413          * underflow/underflow.
2414          */
2415         PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len;
2416
2417         /*
2418          * This is the offset within the current SCSI command; for the first
2419          * call to cfiscsi_datamove() it will be 0, and for subsequent ones
2420          * it will be the sum of lengths of previous ones.
2421          */
2422         buffer_offset = io->scsiio.kern_rel_offset;
2423
2424         /*
2425          * This is the transfer length expected by the initiator.  In theory,
2426          * it could be different from the correct amount of data from the SCSI
2427          * point of view, even if that doesn't make any sense.
2428          */
2429         expected_len = ntohl(bhssc->bhssc_expected_data_transfer_length);
2430 #if 0
2431         if (expected_len != io->scsiio.kern_total_len) {
2432                 CFISCSI_SESSION_DEBUG(cs, "expected transfer length %zd, "
2433                     "actual length %zd", expected_len,
2434                     (size_t)io->scsiio.kern_total_len);
2435         }
2436 #endif
2437
2438         if (buffer_offset >= expected_len) {
2439 #if 0
2440                 CFISCSI_SESSION_DEBUG(cs, "buffer_offset = %zd, "
2441                     "already sent the expected len", buffer_offset);
2442 #endif
2443                 io->scsiio.be_move_done(io);
2444                 return;
2445         }
2446
2447         i = 0;
2448         sg_addr = NULL;
2449         sg_len = 0;
2450         response = NULL;
2451         bhsdi = NULL;
2452         for (;;) {
2453                 if (response == NULL) {
2454                         response = cfiscsi_pdu_new_response(request, M_NOWAIT);
2455                         if (response == NULL) {
2456                                 CFISCSI_SESSION_WARN(cs, "failed to "
2457                                     "allocate memory; dropping connection");
2458                                 ctl_set_busy(&io->scsiio);
2459                                 io->scsiio.be_move_done(io);
2460                                 cfiscsi_session_terminate(cs);
2461                                 return;
2462                         }
2463                         bhsdi = (struct iscsi_bhs_data_in *)response->ip_bhs;
2464                         bhsdi->bhsdi_opcode = ISCSI_BHS_OPCODE_SCSI_DATA_IN;
2465                         bhsdi->bhsdi_initiator_task_tag =
2466                             bhssc->bhssc_initiator_task_tag;
2467                         bhsdi->bhsdi_datasn = htonl(PDU_EXPDATASN(request));
2468                         PDU_EXPDATASN(request)++;
2469                         bhsdi->bhsdi_buffer_offset = htonl(buffer_offset);
2470                 }
2471
2472                 KASSERT(i < ctl_sg_count, ("i >= ctl_sg_count"));
2473                 if (sg_len == 0) {
2474                         sg_addr = ctl_sglist[i].addr;
2475                         sg_len = ctl_sglist[i].len;
2476                         KASSERT(sg_len > 0, ("sg_len <= 0"));
2477                 }
2478
2479                 len = sg_len;
2480
2481                 /*
2482                  * Truncate to maximum data segment length.
2483                  */
2484                 KASSERT(response->ip_data_len < cs->cs_max_data_segment_length,
2485                     ("ip_data_len %zd >= max_data_segment_length %zd",
2486                     response->ip_data_len, cs->cs_max_data_segment_length));
2487                 if (response->ip_data_len + len >
2488                     cs->cs_max_data_segment_length) {
2489                         len = cs->cs_max_data_segment_length -
2490                             response->ip_data_len;
2491                         KASSERT(len <= sg_len, ("len %zd > sg_len %zd",
2492                             len, sg_len));
2493                 }
2494
2495                 /*
2496                  * Truncate to expected data transfer length.
2497                  */
2498                 KASSERT(buffer_offset + response->ip_data_len < expected_len,
2499                     ("buffer_offset %zd + ip_data_len %zd >= expected_len %zd",
2500                     buffer_offset, response->ip_data_len, expected_len));
2501                 if (buffer_offset + response->ip_data_len + len > expected_len) {
2502                         CFISCSI_SESSION_DEBUG(cs, "truncating from %zd "
2503                             "to expected data transfer length %zd",
2504                             buffer_offset + response->ip_data_len + len, expected_len);
2505                         len = expected_len - (buffer_offset + response->ip_data_len);
2506                         KASSERT(len <= sg_len, ("len %zd > sg_len %zd",
2507                             len, sg_len));
2508                 }
2509
2510                 error = icl_pdu_append_data(response, sg_addr, len, M_NOWAIT);
2511                 if (error != 0) {
2512                         CFISCSI_SESSION_WARN(cs, "failed to "
2513                             "allocate memory; dropping connection");
2514                         icl_pdu_free(response);
2515                         ctl_set_busy(&io->scsiio);
2516                         io->scsiio.be_move_done(io);
2517                         cfiscsi_session_terminate(cs);
2518                         return;
2519                 }
2520                 sg_addr += len;
2521                 sg_len -= len;
2522
2523                 KASSERT(buffer_offset + request->ip_data_len <= expected_len,
2524                     ("buffer_offset %zd + ip_data_len %zd > expected_len %zd",
2525                     buffer_offset, request->ip_data_len, expected_len));
2526                 if (buffer_offset + request->ip_data_len == expected_len) {
2527                         /*
2528                          * Already have the amount of data the initiator wanted.
2529                          */
2530                         break;
2531                 }
2532
2533                 if (sg_len == 0) {
2534                         /*
2535                          * End of scatter-gather segment;
2536                          * proceed to the next one...
2537                          */
2538                         if (i == ctl_sg_count - 1) {
2539                                 /*
2540                                  * ... unless this was the last one.
2541                                  */
2542                                 break;
2543                         }
2544                         i++;
2545                 }
2546
2547                 if (response->ip_data_len == cs->cs_max_data_segment_length) {
2548                         /*
2549                          * Can't stuff more data into the current PDU;
2550                          * queue it.  Note that's not enough to check
2551                          * for kern_data_resid == 0 instead; there
2552                          * may be several Data-In PDUs for the final
2553                          * call to cfiscsi_datamove(), and we want
2554                          * to set the F flag only on the last of them.
2555                          */
2556                         buffer_offset += response->ip_data_len;
2557                         if (buffer_offset == io->scsiio.kern_total_len ||
2558                             buffer_offset == expected_len)
2559                                 bhsdi->bhsdi_flags |= BHSDI_FLAGS_F;
2560                         cfiscsi_pdu_queue(response);
2561                         response = NULL;
2562                         bhsdi = NULL;
2563                 }
2564         }
2565         if (response != NULL) {
2566                 buffer_offset += response->ip_data_len;
2567                 if (buffer_offset == io->scsiio.kern_total_len ||
2568                     buffer_offset == expected_len)
2569                         bhsdi->bhsdi_flags |= BHSDI_FLAGS_F;
2570                 KASSERT(response->ip_data_len > 0, ("sending empty Data-In"));
2571                 cfiscsi_pdu_queue(response);
2572         }
2573
2574         io->scsiio.be_move_done(io);
2575 }
2576
2577 static void
2578 cfiscsi_datamove_out(union ctl_io *io)
2579 {
2580         struct cfiscsi_session *cs;
2581         struct icl_pdu *request, *response;
2582         const struct iscsi_bhs_scsi_command *bhssc;
2583         struct iscsi_bhs_r2t *bhsr2t;
2584         struct cfiscsi_data_wait *cdw;
2585         uint32_t target_transfer_tag;
2586         bool done;
2587
2588         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2589         cs = PDU_SESSION(request);
2590
2591         bhssc = (const struct iscsi_bhs_scsi_command *)request->ip_bhs;
2592         KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2593             ISCSI_BHS_OPCODE_SCSI_COMMAND,
2594             ("bhssc->bhssc_opcode != ISCSI_BHS_OPCODE_SCSI_COMMAND"));
2595
2596         /*
2597          * We need to record it so that we can properly report
2598          * underflow/underflow.
2599          */
2600         PDU_TOTAL_TRANSFER_LEN(request) = io->scsiio.kern_total_len;
2601
2602         /*
2603          * We hadn't received anything during this datamove yet.
2604          */
2605         io->scsiio.ext_data_filled = 0;
2606
2607         target_transfer_tag =
2608             atomic_fetchadd_32(&cs->cs_target_transfer_tag, 1);
2609
2610 #if 0
2611         CFISCSI_SESSION_DEBUG(cs, "expecting Data-Out with initiator "
2612             "task tag 0x%x, target transfer tag 0x%x",
2613             bhssc->bhssc_initiator_task_tag, target_transfer_tag);
2614 #endif
2615         cdw = uma_zalloc(cfiscsi_data_wait_zone, M_NOWAIT | M_ZERO);
2616         if (cdw == NULL) {
2617                 CFISCSI_SESSION_WARN(cs, "failed to "
2618                     "allocate memory; dropping connection");
2619                 ctl_set_busy(&io->scsiio);
2620                 io->scsiio.be_move_done(io);
2621                 cfiscsi_session_terminate(cs);
2622                 return;
2623         }
2624         cdw->cdw_ctl_io = io;
2625         cdw->cdw_target_transfer_tag = target_transfer_tag;
2626         cdw->cdw_initiator_task_tag = bhssc->bhssc_initiator_task_tag;
2627
2628         if (cs->cs_immediate_data && io->scsiio.kern_rel_offset <
2629             icl_pdu_data_segment_length(request)) {
2630                 done = cfiscsi_handle_data_segment(request, cdw);
2631                 if (done) {
2632                         uma_zfree(cfiscsi_data_wait_zone, cdw);
2633                         io->scsiio.be_move_done(io);
2634                         return;
2635                 }
2636         }
2637
2638         CFISCSI_SESSION_LOCK(cs);
2639         TAILQ_INSERT_TAIL(&cs->cs_waiting_for_data_out, cdw, cdw_next);
2640         CFISCSI_SESSION_UNLOCK(cs);
2641
2642         /*
2643          * XXX: We should limit the number of outstanding R2T PDUs
2644          *      per task to MaxOutstandingR2T.
2645          */
2646         response = cfiscsi_pdu_new_response(request, M_NOWAIT);
2647         if (response == NULL) {
2648                 CFISCSI_SESSION_WARN(cs, "failed to "
2649                     "allocate memory; dropping connection");
2650                 ctl_set_busy(&io->scsiio);
2651                 io->scsiio.be_move_done(io);
2652                 cfiscsi_session_terminate(cs);
2653                 return;
2654         }
2655         bhsr2t = (struct iscsi_bhs_r2t *)response->ip_bhs;
2656         bhsr2t->bhsr2t_opcode = ISCSI_BHS_OPCODE_R2T;
2657         bhsr2t->bhsr2t_flags = 0x80;
2658         bhsr2t->bhsr2t_lun = bhssc->bhssc_lun;
2659         bhsr2t->bhsr2t_initiator_task_tag = bhssc->bhssc_initiator_task_tag;
2660         bhsr2t->bhsr2t_target_transfer_tag = target_transfer_tag;
2661         /*
2662          * XXX: Here we assume that cfiscsi_datamove() won't ever
2663          *      be running concurrently on several CPUs for a given
2664          *      command.
2665          */
2666         bhsr2t->bhsr2t_r2tsn = htonl(PDU_R2TSN(request));
2667         PDU_R2TSN(request)++;
2668         /*
2669          * This is the offset within the current SCSI command;
2670          * i.e. for the first call of datamove(), it will be 0,
2671          * and for subsequent ones it will be the sum of lengths
2672          * of previous ones.
2673          *
2674          * The ext_data_filled is to account for unsolicited
2675          * (immediate) data that might have already arrived.
2676          */
2677         bhsr2t->bhsr2t_buffer_offset =
2678             htonl(io->scsiio.kern_rel_offset + io->scsiio.ext_data_filled);
2679         /*
2680          * This is the total length (sum of S/G lengths) this call
2681          * to cfiscsi_datamove() is supposed to handle.
2682          *
2683          * XXX: Limit it to MaxBurstLength.
2684          */
2685         bhsr2t->bhsr2t_desired_data_transfer_length =
2686             htonl(io->scsiio.kern_data_len - io->scsiio.ext_data_filled);
2687         cfiscsi_pdu_queue(response);
2688 }
2689
2690 static void
2691 cfiscsi_datamove(union ctl_io *io)
2692 {
2693
2694         if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN)
2695                 cfiscsi_datamove_in(io);
2696         else
2697                 cfiscsi_datamove_out(io);
2698 }
2699
2700 static void
2701 cfiscsi_scsi_command_done(union ctl_io *io)
2702 {
2703         struct icl_pdu *request, *response;
2704         struct iscsi_bhs_scsi_command *bhssc;
2705         struct iscsi_bhs_scsi_response *bhssr;
2706 #ifdef DIAGNOSTIC
2707         struct cfiscsi_data_wait *cdw;
2708 #endif
2709         struct cfiscsi_session *cs;
2710         uint16_t sense_length;
2711
2712         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2713         cs = PDU_SESSION(request);
2714         bhssc = (struct iscsi_bhs_scsi_command *)request->ip_bhs;
2715         KASSERT((bhssc->bhssc_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2716             ISCSI_BHS_OPCODE_SCSI_COMMAND,
2717             ("replying to wrong opcode 0x%x", bhssc->bhssc_opcode));
2718
2719         //CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x",
2720         //    bhssc->bhssc_initiator_task_tag);
2721
2722 #ifdef DIAGNOSTIC
2723         CFISCSI_SESSION_LOCK(cs);
2724         TAILQ_FOREACH(cdw, &cs->cs_waiting_for_data_out, cdw_next)
2725                 KASSERT(bhssc->bhssc_initiator_task_tag !=
2726                     cdw->cdw_initiator_task_tag, ("dangling cdw"));
2727         CFISCSI_SESSION_UNLOCK(cs);
2728 #endif
2729
2730         response = cfiscsi_pdu_new_response(request, M_WAITOK);
2731         bhssr = (struct iscsi_bhs_scsi_response *)response->ip_bhs;
2732         bhssr->bhssr_opcode = ISCSI_BHS_OPCODE_SCSI_RESPONSE;
2733         bhssr->bhssr_flags = 0x80;
2734         /*
2735          * XXX: We don't deal with bidirectional under/overflows;
2736          *      does anything actually support those?
2737          */
2738         if (PDU_TOTAL_TRANSFER_LEN(request) <
2739             ntohl(bhssc->bhssc_expected_data_transfer_length)) {
2740                 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_UNDERFLOW;
2741                 bhssr->bhssr_residual_count =
2742                     htonl(ntohl(bhssc->bhssc_expected_data_transfer_length) -
2743                     PDU_TOTAL_TRANSFER_LEN(request));
2744                 //CFISCSI_SESSION_DEBUG(cs, "underflow; residual count %d",
2745                 //    ntohl(bhssr->bhssr_residual_count));
2746         } else if (PDU_TOTAL_TRANSFER_LEN(request) >
2747             ntohl(bhssc->bhssc_expected_data_transfer_length)) {
2748                 bhssr->bhssr_flags |= BHSSR_FLAGS_RESIDUAL_OVERFLOW;
2749                 bhssr->bhssr_residual_count =
2750                     htonl(PDU_TOTAL_TRANSFER_LEN(request) -
2751                     ntohl(bhssc->bhssc_expected_data_transfer_length));
2752                 //CFISCSI_SESSION_DEBUG(cs, "overflow; residual count %d",
2753                 //    ntohl(bhssr->bhssr_residual_count));
2754         }
2755         bhssr->bhssr_response = BHSSR_RESPONSE_COMMAND_COMPLETED;
2756         bhssr->bhssr_status = io->scsiio.scsi_status;
2757         bhssr->bhssr_initiator_task_tag = bhssc->bhssc_initiator_task_tag;
2758         bhssr->bhssr_expdatasn = htonl(PDU_EXPDATASN(request));
2759
2760         if (io->scsiio.sense_len > 0) {
2761 #if 0
2762                 CFISCSI_SESSION_DEBUG(cs, "returning %d bytes of sense data",
2763                     io->scsiio.sense_len);
2764 #endif
2765                 sense_length = htons(io->scsiio.sense_len);
2766                 icl_pdu_append_data(response,
2767                     &sense_length, sizeof(sense_length), M_WAITOK);
2768                 icl_pdu_append_data(response,
2769                     &io->scsiio.sense_data, io->scsiio.sense_len, M_WAITOK);
2770         }
2771
2772         ctl_free_io(io);
2773         icl_pdu_free(request);
2774         cfiscsi_pdu_queue(response);
2775 }
2776
2777 static void
2778 cfiscsi_task_management_done(union ctl_io *io)
2779 {
2780         struct icl_pdu *request, *response;
2781         struct iscsi_bhs_task_management_request *bhstmr;
2782         struct iscsi_bhs_task_management_response *bhstmr2;
2783         struct cfiscsi_data_wait *cdw, *tmpcdw;
2784         struct cfiscsi_session *cs;
2785
2786         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2787         cs = PDU_SESSION(request);
2788         bhstmr = (struct iscsi_bhs_task_management_request *)request->ip_bhs;
2789         KASSERT((bhstmr->bhstmr_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) ==
2790             ISCSI_BHS_OPCODE_TASK_REQUEST,
2791             ("replying to wrong opcode 0x%x", bhstmr->bhstmr_opcode));
2792
2793 #if 0
2794         CFISCSI_SESSION_DEBUG(cs, "initiator task tag 0x%x; referenced task tag 0x%x",
2795             bhstmr->bhstmr_initiator_task_tag,
2796             bhstmr->bhstmr_referenced_task_tag);
2797 #endif
2798
2799         if ((bhstmr->bhstmr_function & ~0x80) ==
2800             BHSTMR_FUNCTION_ABORT_TASK) {
2801                 /*
2802                  * Make sure we no longer wait for Data-Out for this command.
2803                  */
2804                 CFISCSI_SESSION_LOCK(cs);
2805                 TAILQ_FOREACH_SAFE(cdw,
2806                     &cs->cs_waiting_for_data_out, cdw_next, tmpcdw) {
2807                         if (bhstmr->bhstmr_referenced_task_tag !=
2808                             cdw->cdw_initiator_task_tag)
2809                                 continue;
2810
2811 #if 0
2812                         CFISCSI_SESSION_DEBUG(cs, "removing csw for initiator task "
2813                             "tag 0x%x", bhstmr->bhstmr_initiator_task_tag);
2814 #endif
2815                         TAILQ_REMOVE(&cs->cs_waiting_for_data_out,
2816                             cdw, cdw_next);
2817                         cdw->cdw_ctl_io->scsiio.be_move_done(cdw->cdw_ctl_io);
2818                         uma_zfree(cfiscsi_data_wait_zone, cdw);
2819                 }
2820                 CFISCSI_SESSION_UNLOCK(cs);
2821         }
2822
2823         response = cfiscsi_pdu_new_response(request, M_WAITOK);
2824         bhstmr2 = (struct iscsi_bhs_task_management_response *)
2825             response->ip_bhs;
2826         bhstmr2->bhstmr_opcode = ISCSI_BHS_OPCODE_TASK_RESPONSE;
2827         bhstmr2->bhstmr_flags = 0x80;
2828         if (io->io_hdr.status == CTL_SUCCESS) {
2829                 bhstmr2->bhstmr_response = BHSTMR_RESPONSE_FUNCTION_COMPLETE;
2830         } else {
2831                 /*
2832                  * XXX: How to figure out what exactly went wrong?  iSCSI spec
2833                  *      expects us to provide detailed error, e.g. "Task does
2834                  *      not exist" or "LUN does not exist".
2835                  */
2836                 CFISCSI_SESSION_DEBUG(cs, "BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED");
2837                 bhstmr2->bhstmr_response =
2838                     BHSTMR_RESPONSE_FUNCTION_NOT_SUPPORTED;
2839         }
2840         bhstmr2->bhstmr_initiator_task_tag = bhstmr->bhstmr_initiator_task_tag;
2841
2842         ctl_free_io(io);
2843         icl_pdu_free(request);
2844         cfiscsi_pdu_queue(response);
2845 }
2846
2847 static void
2848 cfiscsi_done(union ctl_io *io)
2849 {
2850         struct icl_pdu *request;
2851         struct cfiscsi_session *cs;
2852
2853         KASSERT(((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE),
2854                 ("invalid CTL status %#x", io->io_hdr.status));
2855
2856         request = io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr;
2857         if (request == NULL) {
2858                 /*
2859                  * Implicit task termination has just completed; nothing to do.
2860                  */
2861                 return;
2862         }
2863
2864         cs = PDU_SESSION(request);
2865         refcount_release(&cs->cs_outstanding_ctl_pdus);
2866
2867         switch (request->ip_bhs->bhs_opcode & ~ISCSI_BHS_OPCODE_IMMEDIATE) {
2868         case ISCSI_BHS_OPCODE_SCSI_COMMAND:
2869                 cfiscsi_scsi_command_done(io);
2870                 break;
2871         case ISCSI_BHS_OPCODE_TASK_REQUEST:
2872                 cfiscsi_task_management_done(io);
2873                 break;
2874         default:
2875                 panic("cfiscsi_done called with wrong opcode 0x%x",
2876                     request->ip_bhs->bhs_opcode);
2877         }
2878 }