sys/netsmb/smb_iod.c

   1 /*-
   2  * Copyright (c) 2000-2001 Boris Popov
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/endian.h>
  33 #include <sys/proc.h>
  34 #include <sys/kernel.h>
  35 #include <sys/kthread.h>
  36 #include <sys/malloc.h>
  37 #include <sys/mbuf.h>
  38 #include <sys/unistd.h>
  39
  40 #include <netsmb/smb.h>
  41 #include <netsmb/smb_conn.h>
  42 #include <netsmb/smb_rq.h>
  43 #include <netsmb/smb_tran.h>
  44 #include <netsmb/smb_trantcp.h>
  45
  46
  47 #define SMBIOD_SLEEP_TIMO       2
  48 #define SMBIOD_PING_TIMO        60      /* seconds */
  49
  50 #define SMB_IOD_EVLOCKPTR(iod)  (&((iod)->iod_evlock))
  51 #define SMB_IOD_EVLOCK(iod)     smb_sl_lock(&((iod)->iod_evlock))
  52 #define SMB_IOD_EVUNLOCK(iod)   smb_sl_unlock(&((iod)->iod_evlock))
  53
  54 #define SMB_IOD_RQLOCKPTR(iod)  (&((iod)->iod_rqlock))
  55 #define SMB_IOD_RQLOCK(iod)     smb_sl_lock(&((iod)->iod_rqlock))
  56 #define SMB_IOD_RQUNLOCK(iod)   smb_sl_unlock(&((iod)->iod_rqlock))
  57
  58 #define smb_iod_wakeup(iod)     wakeup(&(iod)->iod_flags)
  59
  60
  61 static MALLOC_DEFINE(M_SMBIOD, "SMBIOD", "SMB network io daemon");
  62
  63 static int smb_iod_next;
  64
  65 static int  smb_iod_sendall(struct smbiod *iod);
  66 static int  smb_iod_disconnect(struct smbiod *iod);
  67 static void smb_iod_thread(void *);
  68
  69 static __inline void
  70 smb_iod_rqprocessed(struct smb_rq *rqp, int error)
  71 {
  72         SMBRQ_SLOCK(rqp);
  73         rqp->sr_lerror = error;
  74         rqp->sr_rpgen++;
  75         rqp->sr_state = SMBRQ_NOTIFIED;
  76         wakeup(&rqp->sr_state);
  77         SMBRQ_SUNLOCK(rqp);
  78 }
  79
  80 static void
  81 smb_iod_invrq(struct smbiod *iod)
  82 {
  83         struct smb_rq *rqp;
  84
  85         /*
  86          * Invalidate all outstanding requests for this connection
  87          */
  88         SMB_IOD_RQLOCK(iod);
  89         TAILQ_FOREACH(rqp, &iod->iod_rqlist, sr_link) {
  90                 if (rqp->sr_flags & SMBR_INTERNAL)
  91                         SMBRQ_SUNLOCK(rqp);
  92                 rqp->sr_flags |= SMBR_RESTART;
  93                 smb_iod_rqprocessed(rqp, ENOTCONN);
  94         }
  95         SMB_IOD_RQUNLOCK(iod);
  96 }
  97
  98 static void
  99 smb_iod_closetran(struct smbiod *iod)
 100 {
 101         struct smb_vc *vcp = iod->iod_vc;
 102         struct thread *td = iod->iod_td;
 103
 104         if (vcp->vc_tdata == NULL)
 105                 return;
 106         SMB_TRAN_DISCONNECT(vcp, td);
 107         SMB_TRAN_DONE(vcp, td);
 108         vcp->vc_tdata = NULL;
 109 }
 110
 111 static void
 112 smb_iod_dead(struct smbiod *iod)
 113 {
 114         iod->iod_state = SMBIOD_ST_DEAD;
 115         smb_iod_closetran(iod);
 116         smb_iod_invrq(iod);
 117 }
 118
 119 static int
 120 smb_iod_connect(struct smbiod *iod)
 121 {
 122         struct smb_vc *vcp = iod->iod_vc;
 123         struct thread *td = iod->iod_td;
 124         int error;
 125
 126         SMBIODEBUG("%d\n", iod->iod_state);
 127         switch(iod->iod_state) {
 128             case SMBIOD_ST_VCACTIVE:
 129                 SMBERROR("called for already opened connection\n");
 130                 return EISCONN;
 131             case SMBIOD_ST_DEAD:
 132                 return ENOTCONN;        /* XXX: last error code ? */
 133             default:
 134                 break;
 135         }
 136         vcp->vc_genid++;
 137         error = 0;
 138
 139         error = (int)SMB_TRAN_CREATE(vcp, td);
 140         if (error)
 141                 goto fail;
 142         SMBIODEBUG("tcreate\n");
 143         if (vcp->vc_laddr) {
 144                 error = (int)SMB_TRAN_BIND(vcp, vcp->vc_laddr, td);
 145                 if (error)
 146                         goto fail;
 147         }
 148         SMBIODEBUG("tbind\n");
 149         error = (int)SMB_TRAN_CONNECT(vcp, vcp->vc_paddr, td);
 150         if (error)
 151                 goto fail;
 152         SMB_TRAN_SETPARAM(vcp, SMBTP_SELECTID, &iod->iod_flags);
 153         iod->iod_state = SMBIOD_ST_TRANACTIVE;
 154         SMBIODEBUG("tconnect\n");
 155         /* vcp->vc_mid = 0;*/
 156         error = (int)smb_smb_negotiate(vcp, &iod->iod_scred);
 157         if (error)
 158                 goto fail;
 159         SMBIODEBUG("snegotiate\n");
 160         error = (int)smb_smb_ssnsetup(vcp, &iod->iod_scred);
 161         if (error)
 162                 goto fail;
 163         iod->iod_state = SMBIOD_ST_VCACTIVE;
 164         SMBIODEBUG("completed\n");
 165         smb_iod_invrq(iod);
 166         return (0);
 167
 168  fail:
 169         smb_iod_dead(iod);
 170         return (error);
 171 }
 172
 173 static int
 174 smb_iod_disconnect(struct smbiod *iod)
 175 {
 176         struct smb_vc *vcp = iod->iod_vc;
 177
 178         SMBIODEBUG("\n");
 179         if (iod->iod_state == SMBIOD_ST_VCACTIVE) {
 180                 smb_smb_ssnclose(vcp, &iod->iod_scred);
 181                 iod->iod_state = SMBIOD_ST_TRANACTIVE;
 182         }
 183         vcp->vc_smbuid = SMB_UID_UNKNOWN;
 184         smb_iod_closetran(iod);
 185         iod->iod_state = SMBIOD_ST_NOTCONN;
 186         return 0;
 187 }
 188
 189 static int
 190 smb_iod_treeconnect(struct smbiod *iod, struct smb_share *ssp)
 191 {
 192         int error;
 193
 194         if (iod->iod_state != SMBIOD_ST_VCACTIVE) {
 195                 if (iod->iod_state != SMBIOD_ST_DEAD)
 196                         return ENOTCONN;
 197                 iod->iod_state = SMBIOD_ST_RECONNECT;
 198                 error = smb_iod_connect(iod);
 199                 if (error)
 200                         return error;
 201         }
 202         SMBIODEBUG("tree reconnect\n");
 203         SMBS_ST_LOCK(ssp);
 204         ssp->ss_flags |= SMBS_RECONNECTING;
 205         SMBS_ST_UNLOCK(ssp);
 206         error = smb_smb_treeconnect(ssp, &iod->iod_scred);
 207         SMBS_ST_LOCK(ssp);
 208         ssp->ss_flags &= ~SMBS_RECONNECTING;
 209         SMBS_ST_UNLOCK(ssp);
 210         wakeup(&ssp->ss_vcgenid);
 211         return error;
 212 }
 213
 214 static int
 215 smb_iod_sendrq(struct smbiod *iod, struct smb_rq *rqp)
 216 {
 217         struct thread *td = iod->iod_td;
 218         struct smb_vc *vcp = iod->iod_vc;
 219         struct smb_share *ssp = rqp->sr_share;
 220         struct mbuf *m;
 221         int error;
 222
 223         SMBIODEBUG("iod_state = %d\n", iod->iod_state);
 224         switch (iod->iod_state) {
 225             case SMBIOD_ST_NOTCONN:
 226                 smb_iod_rqprocessed(rqp, ENOTCONN);
 227                 return 0;
 228             case SMBIOD_ST_DEAD:
 229                 iod->iod_state = SMBIOD_ST_RECONNECT;
 230                 return 0;
 231             case SMBIOD_ST_RECONNECT:
 232                 return 0;
 233             default:
 234                 break;
 235         }
 236         if (rqp->sr_sendcnt == 0) {
 237 #ifdef movedtoanotherplace
 238                 if (vcp->vc_maxmux != 0 && iod->iod_muxcnt >= vcp->vc_maxmux)
 239                         return 0;
 240 #endif
 241                 le16enc(rqp->sr_rqtid, ssp ? ssp->ss_tid : SMB_TID_UNKNOWN);
 242                 le16enc(rqp->sr_rquid, vcp ? vcp->vc_smbuid : 0);
 243                 mb_fixhdr(&rqp->sr_rq);
 244                 if (vcp->vc_hflags2 & SMB_FLAGS2_SECURITY_SIGNATURE)
 245                         smb_rq_sign(rqp);
 246         }
 247         if (rqp->sr_sendcnt++ > 5) {
 248                 rqp->sr_flags |= SMBR_RESTART;
 249                 smb_iod_rqprocessed(rqp, rqp->sr_lerror);
 250                 /*
 251                  * If all attempts to send a request failed, then
 252                  * something is seriously hosed.
 253                  */
 254                 return ENOTCONN;
 255         }
 256         SMBSDEBUG("M:%04x, P:%04x, U:%04x, T:%04x\n", rqp->sr_mid, 0, 0, 0);
 257         m_dumpm(rqp->sr_rq.mb_top);
 258         m = m_copym(rqp->sr_rq.mb_top, 0, M_COPYALL, M_WAIT);
 259         error = rqp->sr_lerror = SMB_TRAN_SEND(vcp, m, td);
 260         if (error == 0) {
 261                 getnanotime(&rqp->sr_timesent);
 262                 iod->iod_lastrqsent = rqp->sr_timesent;
 263                 rqp->sr_flags |= SMBR_SENT;
 264                 rqp->sr_state = SMBRQ_SENT;
 265                 return 0;
 266         }
 267         /*
 268          * Check for fatal errors
 269          */
 270         if (SMB_TRAN_FATAL(vcp, error)) {
 271                 /*
 272                  * No further attempts should be made
 273                  */
 274                 return ENOTCONN;
 275         }
 276         if (smb_rq_intr(rqp))
 277                 smb_iod_rqprocessed(rqp, EINTR);
 278         return 0;
 279 }
 280
 281 /*
 282  * Process incoming packets
 283  */
 284 static int
 285 smb_iod_recvall(struct smbiod *iod)
 286 {
 287         struct smb_vc *vcp = iod->iod_vc;
 288         struct thread *td = iod->iod_td;
 289         struct smb_rq *rqp;
 290         struct mbuf *m;
 291         u_char *hp;
 292         u_short mid;
 293         int error;
 294
 295         switch (iod->iod_state) {
 296             case SMBIOD_ST_NOTCONN:
 297             case SMBIOD_ST_DEAD:
 298             case SMBIOD_ST_RECONNECT:
 299                 return 0;
 300             default:
 301                 break;
 302         }
 303         for (;;) {
 304                 m = NULL;
 305                 error = SMB_TRAN_RECV(vcp, &m, td);
 306                 if (error == EWOULDBLOCK)
 307                         break;
 308                 if (SMB_TRAN_FATAL(vcp, error)) {
 309                         smb_iod_dead(iod);
 310                         break;
 311                 }
 312                 if (error)
 313                         break;
 314                 if (m == NULL) {
 315                         SMBERROR("tran return NULL without error\n");
 316                         error = EPIPE;
 317                         continue;
 318                 }
 319                 m = m_pullup(m, SMB_HDRLEN);
 320                 if (m == NULL)
 321                         continue;       /* wait for a good packet */
 322                 /*
 323                  * Now we got an entire and possibly invalid SMB packet.
 324                  * Be careful while parsing it.
 325                  */
 326                 m_dumpm(m);
 327                 hp = mtod(m, u_char*);
 328                 if (bcmp(hp, SMB_SIGNATURE, SMB_SIGLEN) != 0) {
 329                         m_freem(m);
 330                         continue;
 331                 }
 332                 mid = SMB_HDRMID(hp);
 333                 SMBSDEBUG("mid %04x\n", (u_int)mid);
 334                 SMB_IOD_RQLOCK(iod);
 335                 TAILQ_FOREACH(rqp, &iod->iod_rqlist, sr_link) {
 336                         if (rqp->sr_mid != mid)
 337                                 continue;
 338                         SMBRQ_SLOCK(rqp);
 339                         if (rqp->sr_rp.md_top == NULL) {
 340                                 md_initm(&rqp->sr_rp, m);
 341                         } else {
 342                                 if (rqp->sr_flags & SMBR_MULTIPACKET) {
 343                                         md_append_record(&rqp->sr_rp, m);
 344                                 } else {
 345                                         SMBRQ_SUNLOCK(rqp);
 346                                         SMBERROR("duplicate response %d (ignored)\n", mid);
 347                                         break;
 348                                 }
 349                         }
 350                         SMBRQ_SUNLOCK(rqp);
 351                         smb_iod_rqprocessed(rqp, 0);
 352                         break;
 353                 }
 354                 SMB_IOD_RQUNLOCK(iod);
 355                 if (rqp == NULL) {
 356                         SMBERROR("drop resp with mid %d\n", (u_int)mid);
 357 /*                      smb_printrqlist(vcp);*/
 358                         m_freem(m);
 359                 }
 360         }
 361         /*
 362          * check for interrupts
 363          */
 364         SMB_IOD_RQLOCK(iod);
 365         TAILQ_FOREACH(rqp, &iod->iod_rqlist, sr_link) {
 366                 if (smb_td_intr(rqp->sr_cred->scr_td)) {
 367                         smb_iod_rqprocessed(rqp, EINTR);
 368                 }
 369         }
 370         SMB_IOD_RQUNLOCK(iod);
 371         return 0;
 372 }
 373
 374 int
 375 smb_iod_request(struct smbiod *iod, int event, void *ident)
 376 {
 377         struct smbiod_event *evp;
 378         int error;
 379
 380         SMBIODEBUG("\n");
 381         evp = smb_zmalloc(sizeof(*evp), M_SMBIOD, M_WAITOK);
 382         evp->ev_type = event;
 383         evp->ev_ident = ident;
 384         SMB_IOD_EVLOCK(iod);
 385         STAILQ_INSERT_TAIL(&iod->iod_evlist, evp, ev_link);
 386         if ((event & SMBIOD_EV_SYNC) == 0) {
 387                 SMB_IOD_EVUNLOCK(iod);
 388                 smb_iod_wakeup(iod);
 389                 return 0;
 390         }
 391         smb_iod_wakeup(iod);
 392         msleep(evp, SMB_IOD_EVLOCKPTR(iod), PWAIT | PDROP, "90evw", 0);
 393         error = evp->ev_error;
 394         free(evp, M_SMBIOD);
 395         return error;
 396 }
 397
 398 /*
 399  * Place request in the queue.
 400  * Request from smbiod have a high priority.
 401  */
 402 int
 403 smb_iod_addrq(struct smb_rq *rqp)
 404 {
 405         struct smb_vc *vcp = rqp->sr_vc;
 406         struct smbiod *iod = vcp->vc_iod;
 407         int error;
 408
 409         SMBIODEBUG("\n");
 410         if (rqp->sr_cred->scr_td != NULL &&
 411             rqp->sr_cred->scr_td->td_proc == iod->iod_p) {
 412                 rqp->sr_flags |= SMBR_INTERNAL;
 413                 SMB_IOD_RQLOCK(iod);
 414                 TAILQ_INSERT_HEAD(&iod->iod_rqlist, rqp, sr_link);
 415                 SMB_IOD_RQUNLOCK(iod);
 416                 for (;;) {
 417                         if (smb_iod_sendrq(iod, rqp) != 0) {
 418                                 smb_iod_dead(iod);
 419                                 break;
 420                         }
 421                         /*
 422                          * we don't need to lock state field here
 423                          */
 424                         if (rqp->sr_state != SMBRQ_NOTSENT)
 425                                 break;
 426                         tsleep(&iod->iod_flags, PWAIT, "90sndw", hz);
 427                 }
 428                 if (rqp->sr_lerror)
 429                         smb_iod_removerq(rqp);
 430                 return rqp->sr_lerror;
 431         }
 432
 433         switch (iod->iod_state) {
 434             case SMBIOD_ST_NOTCONN:
 435                 return ENOTCONN;
 436             case SMBIOD_ST_DEAD:
 437                 error = smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL);
 438                 if (error)
 439                         return error;
 440                 return EXDEV;
 441             default:
 442                 break;
 443         }
 444
 445         SMB_IOD_RQLOCK(iod);
 446         for (;;) {
 447                 if (vcp->vc_maxmux == 0) {
 448                         SMBERROR("maxmux == 0\n");
 449                         break;
 450                 }
 451                 if (iod->iod_muxcnt < vcp->vc_maxmux)
 452                         break;
 453                 iod->iod_muxwant++;
 454                 msleep(&iod->iod_muxwant, SMB_IOD_RQLOCKPTR(iod),
 455                     PWAIT, "90mux", 0);
 456         }
 457         iod->iod_muxcnt++;
 458         TAILQ_INSERT_TAIL(&iod->iod_rqlist, rqp, sr_link);
 459         SMB_IOD_RQUNLOCK(iod);
 460         smb_iod_wakeup(iod);
 461         return 0;
 462 }
 463
 464 int
 465 smb_iod_removerq(struct smb_rq *rqp)
 466 {
 467         struct smb_vc *vcp = rqp->sr_vc;
 468         struct smbiod *iod = vcp->vc_iod;
 469
 470         SMBIODEBUG("\n");
 471         if (rqp->sr_flags & SMBR_INTERNAL) {
 472                 SMB_IOD_RQLOCK(iod);
 473                 TAILQ_REMOVE(&iod->iod_rqlist, rqp, sr_link);
 474                 SMB_IOD_RQUNLOCK(iod);
 475                 return 0;
 476         }
 477         SMB_IOD_RQLOCK(iod);
 478         while (rqp->sr_flags & SMBR_XLOCK) {
 479                 rqp->sr_flags |= SMBR_XLOCKWANT;
 480                 msleep(rqp, SMB_IOD_RQLOCKPTR(iod), PWAIT, "90xrm", 0);
 481         }
 482         TAILQ_REMOVE(&iod->iod_rqlist, rqp, sr_link);
 483         iod->iod_muxcnt--;
 484         if (iod->iod_muxwant) {
 485                 iod->iod_muxwant--;
 486                 wakeup(&iod->iod_muxwant);
 487         }
 488         SMB_IOD_RQUNLOCK(iod);
 489         return 0;
 490 }
 491
 492 int
 493 smb_iod_waitrq(struct smb_rq *rqp)
 494 {
 495         struct smbiod *iod = rqp->sr_vc->vc_iod;
 496         int error;
 497
 498         SMBIODEBUG("\n");
 499         if (rqp->sr_flags & SMBR_INTERNAL) {
 500                 for (;;) {
 501                         smb_iod_sendall(iod);
 502                         smb_iod_recvall(iod);
 503                         if (rqp->sr_rpgen != rqp->sr_rplast)
 504                                 break;
 505                         tsleep(&iod->iod_flags, PWAIT, "90irq", hz);
 506                 }
 507                 smb_iod_removerq(rqp);
 508                 return rqp->sr_lerror;
 509
 510         }
 511         SMBRQ_SLOCK(rqp);
 512         if (rqp->sr_rpgen == rqp->sr_rplast)
 513                 msleep(&rqp->sr_state, SMBRQ_SLOCKPTR(rqp), PWAIT, "90wrq", 0);
 514         rqp->sr_rplast++;
 515         SMBRQ_SUNLOCK(rqp);
 516         error = rqp->sr_lerror;
 517         if (rqp->sr_flags & SMBR_MULTIPACKET) {
 518                 /*
 519                  * If request should stay in the list, then reinsert it
 520                  * at the end of queue so other waiters have chance to concur
 521                  */
 522                 SMB_IOD_RQLOCK(iod);
 523                 TAILQ_REMOVE(&iod->iod_rqlist, rqp, sr_link);
 524                 TAILQ_INSERT_TAIL(&iod->iod_rqlist, rqp, sr_link);
 525                 SMB_IOD_RQUNLOCK(iod);
 526         } else
 527                 smb_iod_removerq(rqp);
 528         return error;
 529 }
 530
 531
 532 static int
 533 smb_iod_sendall(struct smbiod *iod)
 534 {
 535         struct smb_vc *vcp = iod->iod_vc;
 536         struct smb_rq *rqp;
 537         struct timespec ts, tstimeout;
 538         int herror;
 539
 540         herror = 0;
 541         /*
 542          * Loop through the list of requests and send them if possible
 543          */
 544         SMB_IOD_RQLOCK(iod);
 545         TAILQ_FOREACH(rqp, &iod->iod_rqlist, sr_link) {
 546                 switch (rqp->sr_state) {
 547                     case SMBRQ_NOTSENT:
 548                         rqp->sr_flags |= SMBR_XLOCK;
 549                         SMB_IOD_RQUNLOCK(iod);
 550                         herror = smb_iod_sendrq(iod, rqp);
 551                         SMB_IOD_RQLOCK(iod);
 552                         rqp->sr_flags &= ~SMBR_XLOCK;
 553                         if (rqp->sr_flags & SMBR_XLOCKWANT) {
 554                                 rqp->sr_flags &= ~SMBR_XLOCKWANT;
 555                                 wakeup(rqp);
 556                         }
 557                         break;
 558                     case SMBRQ_SENT:
 559                         SMB_TRAN_GETPARAM(vcp, SMBTP_TIMEOUT, &tstimeout);
 560                         timespecadd(&tstimeout, &tstimeout);
 561                         getnanotime(&ts);
 562                         timespecsub(&ts, &tstimeout);
 563                         if (timespeccmp(&ts, &rqp->sr_timesent, >)) {
 564                                 smb_iod_rqprocessed(rqp, ETIMEDOUT);
 565                         }
 566                         break;
 567                     default:
 568                         break;
 569                 }
 570                 if (herror)
 571                         break;
 572         }
 573         SMB_IOD_RQUNLOCK(iod);
 574         if (herror == ENOTCONN)
 575                 smb_iod_dead(iod);
 576         return 0;
 577 }
 578
 579 /*
 580  * "main" function for smbiod daemon
 581  */
 582 static __inline void
 583 smb_iod_main(struct smbiod *iod)
 584 {
 585 /*      struct smb_vc *vcp = iod->iod_vc;*/
 586         struct smbiod_event *evp;
 587 /*      struct timespec tsnow;*/
 588         int error;
 589
 590         SMBIODEBUG("\n");
 591         error = 0;
 592
 593         /*
 594          * Check all interesting events
 595          */
 596         for (;;) {
 597                 SMB_IOD_EVLOCK(iod);
 598                 evp = STAILQ_FIRST(&iod->iod_evlist);
 599                 if (evp == NULL) {
 600                         SMB_IOD_EVUNLOCK(iod);
 601                         break;
 602                 }
 603                 STAILQ_REMOVE_HEAD(&iod->iod_evlist, ev_link);
 604                 evp->ev_type |= SMBIOD_EV_PROCESSING;
 605                 SMB_IOD_EVUNLOCK(iod);
 606                 switch (evp->ev_type & SMBIOD_EV_MASK) {
 607                     case SMBIOD_EV_CONNECT:
 608                         iod->iod_state = SMBIOD_ST_RECONNECT;
 609                         evp->ev_error = smb_iod_connect(iod);
 610                         break;
 611                     case SMBIOD_EV_DISCONNECT:
 612                         evp->ev_error = smb_iod_disconnect(iod);
 613                         break;
 614                     case SMBIOD_EV_TREECONNECT:
 615                         evp->ev_error = smb_iod_treeconnect(iod, evp->ev_ident);
 616                         break;
 617                     case SMBIOD_EV_SHUTDOWN:
 618                         iod->iod_flags |= SMBIOD_SHUTDOWN;
 619                         break;
 620                     case SMBIOD_EV_NEWRQ:
 621                         break;
 622                 }
 623                 if (evp->ev_type & SMBIOD_EV_SYNC) {
 624                         SMB_IOD_EVLOCK(iod);
 625                         wakeup(evp);
 626                         SMB_IOD_EVUNLOCK(iod);
 627                 } else
 628                         free(evp, M_SMBIOD);
 629         }
 630 #if 0
 631         if (iod->iod_state == SMBIOD_ST_VCACTIVE) {
 632                 getnanotime(&tsnow);
 633                 timespecsub(&tsnow, &iod->iod_pingtimo);
 634                 if (timespeccmp(&tsnow, &iod->iod_lastrqsent, >)) {
 635                         smb_smb_echo(vcp, &iod->iod_scred);
 636                 }
 637         }
 638 #endif
 639         smb_iod_sendall(iod);
 640         smb_iod_recvall(iod);
 641         return;
 642 }
 643
 644 void
 645 smb_iod_thread(void *arg)
 646 {
 647         struct smbiod *iod = arg;
 648
 649         mtx_lock(&Giant);
 650
 651         /*
 652          * Here we assume that the thread structure will be the same
 653          * for an entire kthread (kproc, to be more precise) life.
 654          */
 655         iod->iod_td = curthread;
 656         smb_makescred(&iod->iod_scred, iod->iod_td, NULL);
 657         while ((iod->iod_flags & SMBIOD_SHUTDOWN) == 0) {
 658                 smb_iod_main(iod);
 659                 SMBIODEBUG("going to sleep for %d ticks\n", iod->iod_sleeptimo);
 660                 if (iod->iod_flags & SMBIOD_SHUTDOWN)
 661                         break;
 662                 tsleep(&iod->iod_flags, PWAIT, "90idle", iod->iod_sleeptimo);
 663         }
 664         mtx_unlock(&Giant);
 665         kproc_exit(0);
 666 }
 667
 668 int
 669 smb_iod_create(struct smb_vc *vcp)
 670 {
 671         struct smbiod *iod;
 672         int error;
 673
 674         iod = smb_zmalloc(sizeof(*iod), M_SMBIOD, M_WAITOK);
 675         iod->iod_id = smb_iod_next++;
 676         iod->iod_state = SMBIOD_ST_NOTCONN;
 677         iod->iod_vc = vcp;
 678         iod->iod_sleeptimo = hz * SMBIOD_SLEEP_TIMO;
 679         iod->iod_pingtimo.tv_sec = SMBIOD_PING_TIMO;
 680         getnanotime(&iod->iod_lastrqsent);
 681         vcp->vc_iod = iod;
 682         smb_sl_init(&iod->iod_rqlock, "90rql");
 683         TAILQ_INIT(&iod->iod_rqlist);
 684         smb_sl_init(&iod->iod_evlock, "90evl");
 685         STAILQ_INIT(&iod->iod_evlist);
 686         error = kproc_create(smb_iod_thread, iod, &iod->iod_p,
 687             RFNOWAIT, 0, "smbiod%d", iod->iod_id);
 688         if (error) {
 689                 SMBERROR("can't start smbiod: %d", error);
 690                 free(iod, M_SMBIOD);
 691                 return error;
 692         }
 693         return 0;
 694 }
 695
 696 int
 697 smb_iod_destroy(struct smbiod *iod)
 698 {
 699         smb_iod_request(iod, SMBIOD_EV_SHUTDOWN | SMBIOD_EV_SYNC, NULL);
 700         smb_sl_destroy(&iod->iod_rqlock);
 701         smb_sl_destroy(&iod->iod_evlock);
 702         free(iod, M_SMBIOD);
 703         return 0;
 704 }
 705
 706 int
 707 smb_iod_init(void)
 708 {
 709         return 0;
 710 }
 711
 712 int
 713 smb_iod_done(void)
 714 {
 715         return 0;
 716 }
 717