sys/netsmb/smb_conn.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 /*
  28  * Connection engine.
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #include <sys/malloc.h>
  38 #include <sys/priv.h>
  39 #include <sys/proc.h>
  40 #include <sys/lock.h>
  41 #include <sys/sysctl.h>
  42 #include <sys/socketvar.h>
  43
  44 #include <sys/iconv.h>
  45
  46 #include <netsmb/smb.h>
  47 #include <netsmb/smb_subr.h>
  48 #include <netsmb/smb_conn.h>
  49 #include <netsmb/smb_tran.h>
  50 #include <netsmb/smb_trantcp.h>
  51
  52 static struct smb_connobj smb_vclist;
  53 static int smb_vcnext = 1;      /* next unique id for VC */
  54
  55 SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol");
  56
  57 static MALLOC_DEFINE(M_SMBCONN, "smb_conn", "SMB connection");
  58
  59 static void smb_co_init(struct smb_connobj *cp, int level, char *ilockname,
  60     char *lockname);
  61 static void smb_co_done(struct smb_connobj *cp);
  62 static int  smb_vc_disconnect(struct smb_vc *vcp);
  63 static void smb_vc_free(struct smb_connobj *cp);
  64 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred);
  65 static smb_co_free_t smb_share_free;
  66 static smb_co_gone_t smb_share_gone;
  67
  68 static int  smb_sysctl_treedump(SYSCTL_HANDLER_ARGS);
  69
  70 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE,
  71             NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree");
  72
  73 int
  74 smb_sm_init(void)
  75 {
  76
  77         smb_co_init(&smb_vclist, SMBL_SM, "smbsm ilock", "smbsm");
  78         sx_xlock(&smb_vclist.co_interlock);
  79         smb_co_unlock(&smb_vclist);
  80         sx_unlock(&smb_vclist.co_interlock);
  81         return 0;
  82 }
  83
  84 int
  85 smb_sm_done(void)
  86 {
  87
  88         /* XXX: hold the mutex */
  89         if (smb_vclist.co_usecount > 1) {
  90                 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1);
  91                 return EBUSY;
  92         }
  93         smb_co_done(&smb_vclist);
  94         return 0;
  95 }
  96
  97 static int
  98 smb_sm_lockvclist(void)
  99 {
 100         int error;
 101
 102         sx_xlock(&smb_vclist.co_interlock);
 103         error = smb_co_lock(&smb_vclist);
 104         sx_unlock(&smb_vclist.co_interlock);
 105
 106         return error;
 107 }
 108
 109 static void
 110 smb_sm_unlockvclist(void)
 111 {
 112
 113         sx_xlock(&smb_vclist.co_interlock);
 114         smb_co_unlock(&smb_vclist);
 115         sx_unlock(&smb_vclist.co_interlock);
 116 }
 117
 118 static int
 119 smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
 120         struct smb_cred *scred, struct smb_vc **vcpp)
 121 {
 122         struct smb_connobj *scp;
 123         struct smb_vc *vcp;
 124         int exact = 1;
 125         int error;
 126
 127         vcspec->shspec = shspec;
 128         error = ENOENT;
 129         vcp = NULL;
 130         SMBCO_FOREACH(scp, &smb_vclist) {
 131                 vcp = (struct smb_vc *)scp;
 132                 error = smb_vc_lock(vcp);
 133                 if (error)
 134                         continue;
 135
 136                 if ((vcp->obj.co_flags & SMBV_PRIVATE) ||
 137                     !CONNADDREQ(vcp->vc_paddr, vcspec->sap) ||
 138                     strcmp(vcp->vc_username, vcspec->username) != 0)
 139                         goto err1;
 140                 if (vcspec->owner != SMBM_ANY_OWNER) {
 141                         if (vcp->vc_uid != vcspec->owner)
 142                                 goto err1;
 143                 } else
 144                         exact = 0;
 145                 if (vcspec->group != SMBM_ANY_GROUP) {
 146                         if (vcp->vc_grp != vcspec->group)
 147                                 goto err1;
 148                 } else
 149                         exact = 0;
 150                 if (vcspec->mode & SMBM_EXACT) {
 151                         if (!exact || (vcspec->mode & SMBM_MASK) !=
 152                             vcp->vc_mode)
 153                                 goto err1;
 154                 }
 155                 if (smb_vc_access(vcp, scred, vcspec->mode) != 0)
 156                         goto err1;
 157                 vcspec->ssp = NULL;
 158                 if (shspec) {
 159                         error = (int)smb_vc_lookupshare(vcp, shspec, scred,
 160                             &vcspec->ssp);
 161                         if (error)
 162                                 goto fail;
 163                 }
 164                 error = 0;
 165                 break;
 166         err1:
 167                 error = 1;
 168         fail:
 169                 smb_vc_unlock(vcp);
 170         }
 171         if (vcp) {
 172                 smb_vc_ref(vcp);
 173                 *vcpp = vcp;
 174         }
 175         return (error);
 176 }
 177
 178 int
 179 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
 180         struct smb_cred *scred, struct smb_vc **vcpp)
 181 {
 182         struct smb_vc *vcp;
 183         struct smb_share *ssp = NULL;
 184         int error;
 185
 186         *vcpp = vcp = NULL;
 187
 188         error = smb_sm_lockvclist();
 189         if (error)
 190                 return error;
 191         error = smb_sm_lookupint(vcspec, shspec, scred, vcpp);
 192         if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) {
 193                 smb_sm_unlockvclist();
 194                 return error;
 195         }
 196         error = smb_sm_lookupint(vcspec, NULL, scred, &vcp);
 197         if (error) {
 198                 error = smb_vc_create(vcspec, scred, &vcp);
 199                 if (error)
 200                         goto out;
 201                 error = smb_vc_connect(vcp, scred);
 202                 if (error)
 203                         goto out;
 204         }
 205         if (shspec == NULL)
 206                 goto out;
 207         error = smb_share_create(vcp, shspec, scred, &ssp);
 208         if (error)
 209                 goto out;
 210         error = smb_smb_treeconnect(ssp, scred);
 211         if (error == 0)
 212                 vcspec->ssp = ssp;
 213         else
 214                 smb_share_put(ssp, scred);
 215 out:
 216         smb_sm_unlockvclist();
 217         if (error == 0)
 218                 *vcpp = vcp;
 219         else if (vcp) {
 220                 smb_vc_lock(vcp);
 221                 smb_vc_put(vcp, scred);
 222         }
 223         return error;
 224 }
 225
 226 /*
 227  * Common code for connection object
 228  */
 229 static void
 230 smb_co_init(struct smb_connobj *cp, int level, char *ilockname, char *lockname)
 231 {
 232         SLIST_INIT(&cp->co_children);
 233         sx_init_flags(&cp->co_interlock, ilockname, SX_RECURSE);
 234         cv_init(&cp->co_lock, "smblock");
 235         cp->co_lockcnt = 0;
 236         cp->co_locker = NULL;
 237         cp->co_level = level;
 238         cp->co_usecount = 1;
 239         sx_xlock(&cp->co_interlock);
 240         smb_co_lock(cp);
 241         sx_unlock(&cp->co_interlock);
 242 }
 243
 244 static void
 245 smb_co_done(struct smb_connobj *cp)
 246 {
 247
 248         sx_destroy(&cp->co_interlock);
 249         cv_destroy(&cp->co_lock);
 250         cp->co_locker = NULL;
 251         cp->co_flags = 0;
 252         cp->co_lockcnt = 0;
 253 }
 254
 255 static void
 256 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred)
 257 {
 258         struct smb_connobj *parent;
 259
 260         if (cp->co_gone)
 261                 cp->co_gone(cp, scred);
 262         parent = cp->co_parent;
 263         if (parent) {
 264                 sx_xlock(&parent->co_interlock);
 265                 smb_co_lock(parent);
 266                 sx_unlock(&parent->co_interlock);
 267                 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next);
 268                 smb_co_put(parent, scred);
 269         }
 270         if (cp->co_free)
 271                 cp->co_free(cp);
 272 }
 273
 274 void
 275 smb_co_ref(struct smb_connobj *cp)
 276 {
 277
 278         sx_xlock(&cp->co_interlock);
 279         cp->co_usecount++;
 280         sx_unlock(&cp->co_interlock);
 281 }
 282
 283 void
 284 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred)
 285 {
 286
 287         sx_xlock(&cp->co_interlock);
 288         smb_co_unlock(cp);
 289         if (cp->co_usecount > 1) {
 290                 cp->co_usecount--;
 291                 sx_unlock(&cp->co_interlock);
 292                 return;
 293         }
 294         if (cp->co_usecount == 0) {
 295                 SMBERROR("negative use_count for object %d", cp->co_level);
 296                 sx_unlock(&cp->co_interlock);
 297                 return;
 298         }
 299         cp->co_usecount--;
 300         cp->co_flags |= SMBO_GONE;
 301         sx_unlock(&cp->co_interlock);
 302         smb_co_gone(cp, scred);
 303 }
 304
 305 int
 306 smb_co_get(struct smb_connobj *cp, struct smb_cred *scred)
 307 {
 308         int error;
 309
 310         MPASS(sx_xholder(&cp->co_interlock) == curthread);
 311         cp->co_usecount++;
 312         error = smb_co_lock(cp);
 313         if (error)
 314                 cp->co_usecount--;
 315         return error;
 316 }
 317
 318 void
 319 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred)
 320 {
 321
 322         sx_xlock(&cp->co_interlock);
 323         if (cp->co_usecount > 1) {
 324                 cp->co_usecount--;
 325         } else if (cp->co_usecount == 1) {
 326                 cp->co_usecount--;
 327                 cp->co_flags |= SMBO_GONE;
 328         } else {
 329                 SMBERROR("negative usecount");
 330         }
 331         smb_co_unlock(cp);
 332         sx_unlock(&cp->co_interlock);
 333         if ((cp->co_flags & SMBO_GONE) == 0)
 334                 return;
 335         smb_co_gone(cp, scred);
 336 }
 337
 338 int
 339 smb_co_lock(struct smb_connobj *cp)
 340 {
 341
 342         MPASS(sx_xholder(&cp->co_interlock) == curthread);
 343         for (;;) {
 344                 if (cp->co_flags & SMBO_GONE)
 345                         return EINVAL;
 346                 if (cp->co_locker == NULL) {
 347                         cp->co_locker = curthread;
 348                         return 0;
 349                 }
 350                 if (cp->co_locker == curthread) {
 351                         cp->co_lockcnt++;
 352                         return 0;
 353                 }
 354                 cv_wait(&cp->co_lock, &cp->co_interlock);
 355         }
 356 }
 357
 358 void
 359 smb_co_unlock(struct smb_connobj *cp)
 360 {
 361
 362         MPASS(sx_xholder(&cp->co_interlock) == curthread);
 363         MPASS(cp->co_locker == curthread);
 364         if (cp->co_lockcnt != 0) {
 365                 cp->co_lockcnt--;
 366                 return;
 367         }
 368         cp->co_locker = NULL;
 369         cv_signal(&cp->co_lock);
 370 }
 371
 372 static void
 373 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child)
 374 {
 375
 376         smb_co_ref(parent);
 377         SLIST_INSERT_HEAD(&parent->co_children, child, co_next);
 378         child->co_parent = parent;
 379 }
 380
 381 /*
 382  * Session implementation
 383  */
 384
 385 int
 386 smb_vc_create(struct smb_vcspec *vcspec,
 387         struct smb_cred *scred, struct smb_vc **vcpp)
 388 {
 389         struct smb_vc *vcp;
 390         struct ucred *cred = scred->scr_cred;
 391         uid_t uid = vcspec->owner;
 392         gid_t gid = vcspec->group;
 393         uid_t realuid = cred->cr_uid;
 394         char *domain = vcspec->domain;
 395         int error, isroot;
 396
 397         isroot = smb_suser(cred) == 0;
 398         /*
 399          * Only superuser can create VCs with different uid and gid
 400          */
 401         if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
 402                 return EPERM;
 403         if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
 404                 return EPERM;
 405
 406         vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK);
 407         smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc ilock", "smb_vc");
 408         vcp->obj.co_free = smb_vc_free;
 409         vcp->obj.co_gone = smb_vc_gone;
 410         vcp->vc_number = smb_vcnext++;
 411         vcp->vc_timo = SMB_DEFRQTIMO;
 412         vcp->vc_smbuid = SMB_UID_UNKNOWN;
 413         vcp->vc_mode = vcspec->rights & SMBM_MASK;
 414         vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE);
 415         vcp->vc_tdesc = &smb_tran_nbtcp_desc;
 416         vcp->vc_seqno = 0;
 417         vcp->vc_mackey = NULL;
 418         vcp->vc_mackeylen = 0;
 419
 420         if (uid == SMBM_ANY_OWNER)
 421                 uid = realuid;
 422         if (gid == SMBM_ANY_GROUP)
 423                 gid = cred->cr_groups[0];
 424         vcp->vc_uid = uid;
 425         vcp->vc_grp = gid;
 426
 427         smb_sl_init(&vcp->vc_stlock, "vcstlock");
 428         error = ENOMEM;
 429
 430         vcp->vc_paddr = sodupsockaddr(vcspec->sap, M_WAITOK);
 431         if (vcp->vc_paddr == NULL)
 432                 goto fail;
 433         vcp->vc_laddr = sodupsockaddr(vcspec->lap, M_WAITOK);
 434         if (vcp->vc_laddr == NULL)
 435                 goto fail;
 436         vcp->vc_pass = smb_strdup(vcspec->pass);
 437         if (vcp->vc_pass == NULL)
 438                 goto fail;
 439         vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain :
 440             "NODOMAIN");
 441         if (vcp->vc_domain == NULL)
 442                 goto fail;
 443         vcp->vc_srvname = smb_strdup(vcspec->srvname);
 444         if (vcp->vc_srvname == NULL)
 445                 goto fail;
 446         vcp->vc_username = smb_strdup(vcspec->username);
 447         if (vcp->vc_username == NULL)
 448                 goto fail;
 449         error = (int)iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower);
 450         if (error)
 451                 goto fail;
 452         error = (int)iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper);
 453         if (error)
 454                 goto fail;
 455         if (vcspec->servercs[0]) {
 456                 error = (int)iconv_open(vcspec->servercs, vcspec->localcs,
 457                     &vcp->vc_cp_toserver);
 458                 if (error)
 459                         goto fail;
 460                 error = (int)iconv_open(vcspec->localcs, vcspec->servercs,
 461                     &vcp->vc_cp_tolocal);
 462                 if (error)
 463                         goto fail;
 464                 vcp->vc_toserver = vcp->vc_cp_toserver;
 465                 vcp->vc_tolocal = vcp->vc_cp_tolocal;
 466                 iconv_add(ENCODING_UNICODE, ENCODING_UNICODE, SMB_UNICODE_NAME);
 467                 iconv_add(ENCODING_UNICODE, SMB_UNICODE_NAME, ENCODING_UNICODE);
 468                 error = (int)iconv_open(SMB_UNICODE_NAME, vcspec->localcs,
 469                     &vcp->vc_ucs_toserver);
 470                 if (!error) {
 471                         error = (int)iconv_open(vcspec->localcs, SMB_UNICODE_NAME,
 472                             &vcp->vc_ucs_tolocal);
 473                 }
 474                 if (error) {
 475                         if (vcp->vc_ucs_toserver)
 476                                 iconv_close(vcp->vc_ucs_toserver);
 477                         vcp->vc_ucs_toserver = NULL;
 478                         vcp->vc_ucs_tolocal = NULL;
 479                 }
 480         }
 481         error = (int)smb_iod_create(vcp);
 482         if (error)
 483                 goto fail;
 484         *vcpp = vcp;
 485         smb_co_addchild(&smb_vclist, VCTOCP(vcp));
 486         return (0);
 487
 488  fail:
 489         smb_vc_put(vcp, scred);
 490         return (error);
 491 }
 492
 493 static void
 494 smb_vc_free(struct smb_connobj *cp)
 495 {
 496         struct smb_vc *vcp = CPTOVC(cp);
 497
 498         if (vcp->vc_iod)
 499                 smb_iod_destroy(vcp->vc_iod);
 500         SMB_STRFREE(vcp->vc_username);
 501         SMB_STRFREE(vcp->vc_srvname);
 502         SMB_STRFREE(vcp->vc_pass);
 503         SMB_STRFREE(vcp->vc_domain);
 504         if (vcp->vc_mackey)
 505                 free(vcp->vc_mackey, M_SMBTEMP);
 506         if (vcp->vc_paddr)
 507                 free(vcp->vc_paddr, M_SONAME);
 508         if (vcp->vc_laddr)
 509                 free(vcp->vc_laddr, M_SONAME);
 510         if (vcp->vc_tolower)
 511                 iconv_close(vcp->vc_tolower);
 512         if (vcp->vc_toupper)
 513                 iconv_close(vcp->vc_toupper);
 514         if (vcp->vc_tolocal)
 515                 vcp->vc_tolocal = NULL;
 516         if (vcp->vc_toserver)
 517                 vcp->vc_toserver = NULL;
 518         if (vcp->vc_cp_tolocal)
 519                 iconv_close(vcp->vc_cp_tolocal);
 520         if (vcp->vc_cp_toserver)
 521                 iconv_close(vcp->vc_cp_toserver);
 522         if (vcp->vc_ucs_tolocal)
 523                 iconv_close(vcp->vc_ucs_tolocal);
 524         if (vcp->vc_ucs_toserver)
 525                 iconv_close(vcp->vc_ucs_toserver);
 526         smb_co_done(VCTOCP(vcp));
 527         smb_sl_destroy(&vcp->vc_stlock);
 528         free(vcp, M_SMBCONN);
 529 }
 530
 531 /*
 532  * Called when use count of VC dropped to zero.
 533  * VC should be locked on enter with LK_DRAIN.
 534  */
 535 static void
 536 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred)
 537 {
 538         struct smb_vc *vcp = CPTOVC(cp);
 539
 540         smb_vc_disconnect(vcp);
 541 }
 542
 543 void
 544 smb_vc_ref(struct smb_vc *vcp)
 545 {
 546         smb_co_ref(VCTOCP(vcp));
 547 }
 548
 549 void
 550 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred)
 551 {
 552         smb_co_rele(VCTOCP(vcp), scred);
 553 }
 554
 555 int
 556 smb_vc_get(struct smb_vc *vcp, struct smb_cred *scred)
 557 {
 558         struct smb_connobj *cp;
 559         int error;
 560
 561         cp = VCTOCP(vcp);
 562         sx_xlock(&cp->co_interlock);
 563         error = smb_co_get(cp, scred);
 564         sx_unlock(&cp->co_interlock);
 565         return error;
 566 }
 567
 568 void
 569 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred)
 570 {
 571         smb_co_put(VCTOCP(vcp), scred);
 572 }
 573
 574 int
 575 smb_vc_lock(struct smb_vc *vcp)
 576 {
 577         struct smb_connobj *cp;
 578         int error;
 579
 580         cp = VCTOCP(vcp);
 581         sx_xlock(&cp->co_interlock);
 582         error = smb_co_lock(cp);
 583         sx_unlock(&cp->co_interlock);
 584         return error;
 585 }
 586
 587 void
 588 smb_vc_unlock(struct smb_vc *vcp)
 589 {
 590
 591         struct smb_connobj *cp;
 592
 593         cp = VCTOCP(vcp);
 594         sx_xlock(&cp->co_interlock);
 595         smb_co_unlock(cp);
 596         sx_unlock(&cp->co_interlock);
 597 }
 598
 599 int
 600 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode)
 601 {
 602         struct ucred *cred = scred->scr_cred;
 603
 604         if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid)
 605                 return 0;
 606         mode >>= 3;
 607         if (!groupmember(vcp->vc_grp, cred))
 608                 mode >>= 3;
 609         return (vcp->vc_mode & mode) == mode ? 0 : EACCES;
 610 }
 611
 612 static int
 613 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp)
 614 {
 615         int exact = 1;
 616
 617         if (strcmp(ssp->ss_name, dp->name) != 0)
 618                 return 1;
 619         if (dp->owner != SMBM_ANY_OWNER) {
 620                 if (ssp->ss_uid != dp->owner)
 621                         return 1;
 622         } else
 623                 exact = 0;
 624         if (dp->group != SMBM_ANY_GROUP) {
 625                 if (ssp->ss_grp != dp->group)
 626                         return 1;
 627         } else
 628                 exact = 0;
 629
 630         if (dp->mode & SMBM_EXACT) {
 631                 if (!exact)
 632                         return 1;
 633                 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1;
 634         }
 635         if (smb_share_access(ssp, dp->scred, dp->mode) != 0)
 636                 return 1;
 637         return 0;
 638 }
 639
 640 /*
 641  * Lookup share in the given VC. Share referenced and locked on return.
 642  * VC expected to be locked on entry and will be left locked on exit.
 643  */
 644 int
 645 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp,
 646         struct smb_cred *scred, struct smb_share **sspp)
 647 {
 648         struct smb_connobj *scp = NULL;
 649         struct smb_share *ssp = NULL;
 650         int error;
 651
 652         *sspp = NULL;
 653         dp->scred = scred;
 654         SMBCO_FOREACH(scp, VCTOCP(vcp)) {
 655                 ssp = (struct smb_share *)scp;
 656                 error = smb_share_lock(ssp);
 657                 if (error)
 658                         continue;
 659                 if (smb_vc_cmpshare(ssp, dp) == 0)
 660                         break;
 661                 smb_share_unlock(ssp);
 662         }
 663         if (ssp) {
 664                 smb_share_ref(ssp);
 665                 *sspp = ssp;
 666                 error = 0;
 667         } else
 668                 error = ENOENT;
 669         return error;
 670 }
 671
 672 int
 673 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred)
 674 {
 675
 676         return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL);
 677 }
 678
 679 /*
 680  * Destroy VC to server, invalidate shares linked with it.
 681  * Transport should be locked on entry.
 682  */
 683 int
 684 smb_vc_disconnect(struct smb_vc *vcp)
 685 {
 686
 687         smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL);
 688         return 0;
 689 }
 690
 691 static char smb_emptypass[] = "";
 692
 693 const char *
 694 smb_vc_getpass(struct smb_vc *vcp)
 695 {
 696         if (vcp->vc_pass)
 697                 return vcp->vc_pass;
 698         return smb_emptypass;
 699 }
 700
 701 static int
 702 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip)
 703 {
 704         bzero(vip, sizeof(struct smb_vc_info));
 705         vip->itype = SMB_INFO_VC;
 706         vip->usecount = vcp->obj.co_usecount;
 707         vip->uid = vcp->vc_uid;
 708         vip->gid = vcp->vc_grp;
 709         vip->mode = vcp->vc_mode;
 710         vip->flags = vcp->obj.co_flags;
 711         vip->sopt = vcp->vc_sopt;
 712         vip->iodstate = vcp->vc_iod->iod_state;
 713         bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey));
 714         snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname);
 715         snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username);
 716         return 0;
 717 }
 718
 719 u_short
 720 smb_vc_nextmid(struct smb_vc *vcp)
 721 {
 722         u_short r;
 723
 724         sx_xlock(&vcp->obj.co_interlock);
 725         r = vcp->vc_mid++;
 726         sx_unlock(&vcp->obj.co_interlock);
 727         return r;
 728 }
 729
 730 /*
 731  * Share implementation
 732  */
 733 /*
 734  * Allocate share structure and attach it to the given VC
 735  * Connection expected to be locked on entry. Share will be returned
 736  * in locked state.
 737  */
 738 int
 739 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec,
 740         struct smb_cred *scred, struct smb_share **sspp)
 741 {
 742         struct smb_share *ssp;
 743         struct ucred *cred = scred->scr_cred;
 744         uid_t realuid = cred->cr_uid;
 745         uid_t uid = shspec->owner;
 746         gid_t gid = shspec->group;
 747         int error, isroot;
 748
 749         isroot = smb_suser(cred) == 0;
 750         /*
 751          * Only superuser can create shares with different uid and gid
 752          */
 753         if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
 754                 return EPERM;
 755         if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
 756                 return EPERM;
 757         error = smb_vc_lookupshare(vcp, shspec, scred, &ssp);
 758         if (!error) {
 759                 smb_share_put(ssp, scred);
 760                 return EEXIST;
 761         }
 762         if (uid == SMBM_ANY_OWNER)
 763                 uid = realuid;
 764         if (gid == SMBM_ANY_GROUP)
 765                 gid = cred->cr_groups[0];
 766         ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK);
 767         smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss ilock", "smbss");
 768         ssp->obj.co_free = smb_share_free;
 769         ssp->obj.co_gone = smb_share_gone;
 770         smb_sl_init(&ssp->ss_stlock, "ssstlock");
 771         ssp->ss_name = smb_strdup(shspec->name);
 772         if (shspec->pass && shspec->pass[0])
 773                 ssp->ss_pass = smb_strdup(shspec->pass);
 774         ssp->ss_type = shspec->stype;
 775         ssp->ss_tid = SMB_TID_UNKNOWN;
 776         ssp->ss_uid = uid;
 777         ssp->ss_grp = gid;
 778         ssp->ss_mode = shspec->rights & SMBM_MASK;
 779         smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp));
 780         *sspp = ssp;
 781         return 0;
 782 }
 783
 784 static void
 785 smb_share_free(struct smb_connobj *cp)
 786 {
 787         struct smb_share *ssp = CPTOSS(cp);
 788
 789         SMB_STRFREE(ssp->ss_name);
 790         SMB_STRFREE(ssp->ss_pass);
 791         smb_sl_destroy(&ssp->ss_stlock);
 792         smb_co_done(SSTOCP(ssp));
 793         free(ssp, M_SMBCONN);
 794 }
 795
 796 static void
 797 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred)
 798 {
 799         struct smb_share *ssp = CPTOSS(cp);
 800
 801         smb_smb_treedisconnect(ssp, scred);
 802 }
 803
 804 void
 805 smb_share_ref(struct smb_share *ssp)
 806 {
 807         smb_co_ref(SSTOCP(ssp));
 808 }
 809
 810 void
 811 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred)
 812 {
 813         smb_co_rele(SSTOCP(ssp), scred);
 814 }
 815
 816 int
 817 smb_share_get(struct smb_share *ssp, struct smb_cred *scred)
 818 {
 819         struct smb_connobj *cp = SSTOCP(ssp);
 820         int error;
 821
 822         sx_xlock(&cp->co_interlock);
 823         error = smb_co_get(cp, scred);
 824         sx_unlock(&cp->co_interlock);
 825         return error;
 826 }
 827
 828 void
 829 smb_share_put(struct smb_share *ssp, struct smb_cred *scred)
 830 {
 831
 832         smb_co_put(SSTOCP(ssp), scred);
 833 }
 834
 835 int
 836 smb_share_lock(struct smb_share *ssp)
 837 {
 838         struct smb_connobj *cp;
 839         int error;
 840
 841         cp = SSTOCP(ssp);
 842         sx_xlock(&cp->co_interlock);
 843         error = smb_co_lock(cp);
 844         sx_unlock(&cp->co_interlock);
 845         return error;
 846 }
 847
 848 void
 849 smb_share_unlock(struct smb_share *ssp)
 850 {
 851         struct smb_connobj *cp;
 852
 853         cp = SSTOCP(ssp);
 854         sx_xlock(&cp->co_interlock);
 855         smb_co_unlock(cp);
 856         sx_unlock(&cp->co_interlock);
 857 }
 858
 859 int
 860 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode)
 861 {
 862         struct ucred *cred = scred->scr_cred;
 863
 864         if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid)
 865                 return 0;
 866         mode >>= 3;
 867         if (!groupmember(ssp->ss_grp, cred))
 868                 mode >>= 3;
 869         return (ssp->ss_mode & mode) == mode ? 0 : EACCES;
 870 }
 871
 872 void
 873 smb_share_invalidate(struct smb_share *ssp)
 874 {
 875         ssp->ss_tid = SMB_TID_UNKNOWN;
 876 }
 877
 878 int
 879 smb_share_valid(struct smb_share *ssp)
 880 {
 881         return ssp->ss_tid != SMB_TID_UNKNOWN &&
 882             ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid;
 883 }
 884
 885 const char*
 886 smb_share_getpass(struct smb_share *ssp)
 887 {
 888         struct smb_vc *vcp;
 889
 890         if (ssp->ss_pass)
 891                 return ssp->ss_pass;
 892         vcp = SSTOVC(ssp);
 893         if (vcp->vc_pass)
 894                 return vcp->vc_pass;
 895         return smb_emptypass;
 896 }
 897
 898 static int
 899 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip)
 900 {
 901         bzero(sip, sizeof(struct smb_share_info));
 902         sip->itype = SMB_INFO_SHARE;
 903         sip->usecount = ssp->obj.co_usecount;
 904         sip->tid  = ssp->ss_tid;
 905         sip->type= ssp->ss_type;
 906         sip->uid = ssp->ss_uid;
 907         sip->gid = ssp->ss_grp;
 908         sip->mode= ssp->ss_mode;
 909         sip->flags = ssp->obj.co_flags;
 910         snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name);
 911         return 0;
 912 }
 913
 914 /*
 915  * Dump an entire tree into sysctl call
 916  */
 917 static int
 918 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS)
 919 {
 920         struct smb_connobj *scp1, *scp2;
 921         struct smb_vc *vcp;
 922         struct smb_share *ssp;
 923         struct smb_vc_info vci;
 924         struct smb_share_info ssi;
 925         int error, itype;
 926
 927         error = sysctl_wire_old_buffer(req, 0);
 928         if (error)
 929                 return (error);
 930         error = smb_sm_lockvclist();
 931         if (error)
 932                 return error;
 933         SMBCO_FOREACH(scp1, &smb_vclist) {
 934                 vcp = (struct smb_vc *)scp1;
 935                 error = smb_vc_lock(vcp);
 936                 if (error)
 937                         continue;
 938                 smb_vc_getinfo(vcp, &vci);
 939                 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info));
 940                 if (error) {
 941                         smb_vc_unlock(vcp);
 942                         break;
 943                 }
 944                 SMBCO_FOREACH(scp2, VCTOCP(vcp)) {
 945                         ssp = (struct smb_share *)scp2;
 946                         error = smb_share_lock(ssp);
 947                         if (error) {
 948                                 error = 0;
 949                                 continue;
 950                         }
 951                         smb_share_getinfo(ssp, &ssi);
 952                         smb_share_unlock(ssp);
 953                         error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info));
 954                         if (error)
 955                                 break;
 956                 }
 957                 smb_vc_unlock(vcp);
 958                 if (error)
 959                         break;
 960         }
 961         if (!error) {
 962                 itype = SMB_INFO_NONE;
 963                 error = SYSCTL_OUT(req, &itype, sizeof(itype));
 964         }
 965         smb_sm_unlockvclist();
 966         return error;
 967 }