sys/netsmb/smb_conn.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause
   3  *
   4  * Copyright (c) 2000-2001 Boris Popov
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 /*
  30  * Connection engine.
  31  */
  32
  33 #include <sys/cdefs.h>
  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 | CTLFLAG_MPSAFE, NULL,
  56     "SMB protocol");
  57
  58 static MALLOC_DEFINE(M_SMBCONN, "smb_conn", "SMB connection");
  59
  60 static void smb_co_init(struct smb_connobj *cp, int level, char *ilockname,
  61     char *lockname);
  62 static void smb_co_done(struct smb_connobj *cp);
  63 static int  smb_vc_disconnect(struct smb_vc *vcp);
  64 static void smb_vc_free(struct smb_connobj *cp);
  65 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred);
  66 static smb_co_free_t smb_share_free;
  67 static smb_co_gone_t smb_share_gone;
  68
  69 static int  smb_sysctl_treedump(SYSCTL_HANDLER_ARGS);
  70
  71 SYSCTL_PROC(_net_smb, OID_AUTO, treedump,
  72     CTLFLAG_RD | CTLTYPE_OPAQUE | CTLFLAG_MPSAFE,
  73     NULL, 0, smb_sysctl_treedump, "S,treedump",
  74     "Requester tree");
  75
  76 int
  77 smb_sm_init(void)
  78 {
  79
  80         smb_co_init(&smb_vclist, SMBL_SM, "smbsm ilock", "smbsm");
  81         sx_xlock(&smb_vclist.co_interlock);
  82         smb_co_unlock(&smb_vclist);
  83         sx_unlock(&smb_vclist.co_interlock);
  84         return 0;
  85 }
  86
  87 int
  88 smb_sm_done(void)
  89 {
  90
  91         /* XXX: hold the mutex */
  92         if (smb_vclist.co_usecount > 1) {
  93                 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1);
  94                 return EBUSY;
  95         }
  96         smb_co_done(&smb_vclist);
  97         return 0;
  98 }
  99
 100 static int
 101 smb_sm_lockvclist(void)
 102 {
 103         int error;
 104
 105         sx_xlock(&smb_vclist.co_interlock);
 106         error = smb_co_lock(&smb_vclist);
 107         sx_unlock(&smb_vclist.co_interlock);
 108
 109         return error;
 110 }
 111
 112 static void
 113 smb_sm_unlockvclist(void)
 114 {
 115
 116         sx_xlock(&smb_vclist.co_interlock);
 117         smb_co_unlock(&smb_vclist);
 118         sx_unlock(&smb_vclist.co_interlock);
 119 }
 120
 121 static int
 122 smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
 123         struct smb_cred *scred, struct smb_vc **vcpp)
 124 {
 125         struct smb_connobj *scp;
 126         struct smb_vc *vcp;
 127         int exact = 1;
 128         int error;
 129
 130         vcspec->shspec = shspec;
 131         error = ENOENT;
 132         vcp = NULL;
 133         SMBCO_FOREACH(scp, &smb_vclist) {
 134                 vcp = (struct smb_vc *)scp;
 135                 error = smb_vc_lock(vcp);
 136                 if (error)
 137                         continue;
 138
 139                 if ((vcp->obj.co_flags & SMBV_PRIVATE) ||
 140                     !CONNADDREQ(vcp->vc_paddr, vcspec->sap) ||
 141                     strcmp(vcp->vc_username, vcspec->username) != 0)
 142                         goto err1;
 143                 if (vcspec->owner != SMBM_ANY_OWNER) {
 144                         if (vcp->vc_uid != vcspec->owner)
 145                                 goto err1;
 146                 } else
 147                         exact = 0;
 148                 if (vcspec->group != SMBM_ANY_GROUP) {
 149                         if (vcp->vc_grp != vcspec->group)
 150                                 goto err1;
 151                 } else
 152                         exact = 0;
 153                 if (vcspec->mode & SMBM_EXACT) {
 154                         if (!exact || (vcspec->mode & SMBM_MASK) !=
 155                             vcp->vc_mode)
 156                                 goto err1;
 157                 }
 158                 if (smb_vc_access(vcp, scred, vcspec->mode) != 0)
 159                         goto err1;
 160                 vcspec->ssp = NULL;
 161                 if (shspec) {
 162                         error = (int)smb_vc_lookupshare(vcp, shspec, scred,
 163                             &vcspec->ssp);
 164                         if (error)
 165                                 goto fail;
 166                 }
 167                 error = 0;
 168                 break;
 169         err1:
 170                 error = 1;
 171         fail:
 172                 smb_vc_unlock(vcp);
 173         }
 174         if (vcp) {
 175                 smb_vc_ref(vcp);
 176                 *vcpp = vcp;
 177         }
 178         return (error);
 179 }
 180
 181 int
 182 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
 183         struct smb_cred *scred, struct smb_vc **vcpp)
 184 {
 185         struct smb_vc *vcp;
 186         struct smb_share *ssp = NULL;
 187         int error;
 188
 189         *vcpp = vcp = NULL;
 190
 191         error = smb_sm_lockvclist();
 192         if (error)
 193                 return error;
 194         error = smb_sm_lookupint(vcspec, shspec, scred, vcpp);
 195         if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) {
 196                 smb_sm_unlockvclist();
 197                 return error;
 198         }
 199         error = smb_sm_lookupint(vcspec, NULL, scred, &vcp);
 200         if (error) {
 201                 error = smb_vc_create(vcspec, scred, &vcp);
 202                 if (error)
 203                         goto out;
 204                 error = smb_vc_connect(vcp, scred);
 205                 if (error)
 206                         goto out;
 207         }
 208         if (shspec == NULL)
 209                 goto out;
 210         error = smb_share_create(vcp, shspec, scred, &ssp);
 211         if (error)
 212                 goto out;
 213         error = smb_smb_treeconnect(ssp, scred);
 214         if (error == 0)
 215                 vcspec->ssp = ssp;
 216         else
 217                 smb_share_put(ssp, scred);
 218 out:
 219         smb_sm_unlockvclist();
 220         if (error == 0)
 221                 *vcpp = vcp;
 222         else if (vcp) {
 223                 smb_vc_lock(vcp);
 224                 smb_vc_put(vcp, scred);
 225         }
 226         return error;
 227 }
 228
 229 /*
 230  * Common code for connection object
 231  */
 232 static void
 233 smb_co_init(struct smb_connobj *cp, int level, char *ilockname, char *lockname)
 234 {
 235         SLIST_INIT(&cp->co_children);
 236         sx_init_flags(&cp->co_interlock, ilockname, SX_RECURSE);
 237         cv_init(&cp->co_lock, "smblock");
 238         cp->co_lockcnt = 0;
 239         cp->co_locker = NULL;
 240         cp->co_level = level;
 241         cp->co_usecount = 1;
 242         sx_xlock(&cp->co_interlock);
 243         smb_co_lock(cp);
 244         sx_unlock(&cp->co_interlock);
 245 }
 246
 247 static void
 248 smb_co_done(struct smb_connobj *cp)
 249 {
 250
 251         sx_destroy(&cp->co_interlock);
 252         cv_destroy(&cp->co_lock);
 253         cp->co_locker = NULL;
 254         cp->co_flags = 0;
 255         cp->co_lockcnt = 0;
 256 }
 257
 258 static void
 259 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred)
 260 {
 261         struct smb_connobj *parent;
 262
 263         if (cp->co_gone)
 264                 cp->co_gone(cp, scred);
 265         parent = cp->co_parent;
 266         if (parent) {
 267                 sx_xlock(&parent->co_interlock);
 268                 smb_co_lock(parent);
 269                 sx_unlock(&parent->co_interlock);
 270                 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next);
 271                 smb_co_put(parent, scred);
 272         }
 273         if (cp->co_free)
 274                 cp->co_free(cp);
 275 }
 276
 277 void
 278 smb_co_ref(struct smb_connobj *cp)
 279 {
 280
 281         sx_xlock(&cp->co_interlock);
 282         cp->co_usecount++;
 283         sx_unlock(&cp->co_interlock);
 284 }
 285
 286 void
 287 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred)
 288 {
 289
 290         sx_xlock(&cp->co_interlock);
 291         smb_co_unlock(cp);
 292         if (cp->co_usecount > 1) {
 293                 cp->co_usecount--;
 294                 sx_unlock(&cp->co_interlock);
 295                 return;
 296         }
 297         if (cp->co_usecount == 0) {
 298                 SMBERROR("negative use_count for object %d", cp->co_level);
 299                 sx_unlock(&cp->co_interlock);
 300                 return;
 301         }
 302         cp->co_usecount--;
 303         cp->co_flags |= SMBO_GONE;
 304         sx_unlock(&cp->co_interlock);
 305         smb_co_gone(cp, scred);
 306 }
 307
 308 int
 309 smb_co_get(struct smb_connobj *cp, struct smb_cred *scred)
 310 {
 311         int error;
 312
 313         MPASS(sx_xholder(&cp->co_interlock) == curthread);
 314         cp->co_usecount++;
 315         error = smb_co_lock(cp);
 316         if (error)
 317                 cp->co_usecount--;
 318         return error;
 319 }
 320
 321 void
 322 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred)
 323 {
 324
 325         sx_xlock(&cp->co_interlock);
 326         if (cp->co_usecount > 1) {
 327                 cp->co_usecount--;
 328         } else if (cp->co_usecount == 1) {
 329                 cp->co_usecount--;
 330                 cp->co_flags |= SMBO_GONE;
 331         } else {
 332                 SMBERROR("negative usecount");
 333         }
 334         smb_co_unlock(cp);
 335         sx_unlock(&cp->co_interlock);
 336         if ((cp->co_flags & SMBO_GONE) == 0)
 337                 return;
 338         smb_co_gone(cp, scred);
 339 }
 340
 341 int
 342 smb_co_lock(struct smb_connobj *cp)
 343 {
 344
 345         MPASS(sx_xholder(&cp->co_interlock) == curthread);
 346         for (;;) {
 347                 if (cp->co_flags & SMBO_GONE)
 348                         return EINVAL;
 349                 if (cp->co_locker == NULL) {
 350                         cp->co_locker = curthread;
 351                         return 0;
 352                 }
 353                 if (cp->co_locker == curthread) {
 354                         cp->co_lockcnt++;
 355                         return 0;
 356                 }
 357                 cv_wait(&cp->co_lock, &cp->co_interlock);
 358         }
 359 }
 360
 361 void
 362 smb_co_unlock(struct smb_connobj *cp)
 363 {
 364
 365         MPASS(sx_xholder(&cp->co_interlock) == curthread);
 366         MPASS(cp->co_locker == curthread);
 367         if (cp->co_lockcnt != 0) {
 368                 cp->co_lockcnt--;
 369                 return;
 370         }
 371         cp->co_locker = NULL;
 372         cv_signal(&cp->co_lock);
 373 }
 374
 375 static void
 376 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child)
 377 {
 378
 379         smb_co_ref(parent);
 380         SLIST_INSERT_HEAD(&parent->co_children, child, co_next);
 381         child->co_parent = parent;
 382 }
 383
 384 /*
 385  * Session implementation
 386  */
 387
 388 int
 389 smb_vc_create(struct smb_vcspec *vcspec,
 390         struct smb_cred *scred, struct smb_vc **vcpp)
 391 {
 392         struct smb_vc *vcp;
 393         struct ucred *cred = scred->scr_cred;
 394         uid_t uid = vcspec->owner;
 395         gid_t gid = vcspec->group;
 396         uid_t realuid = cred->cr_uid;
 397         char *domain = vcspec->domain;
 398         int error, isroot;
 399
 400         isroot = smb_suser(cred) == 0;
 401         /*
 402          * Only superuser can create VCs with different uid and gid
 403          */
 404         if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
 405                 return EPERM;
 406         if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
 407                 return EPERM;
 408
 409         vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK);
 410         smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc ilock", "smb_vc");
 411         vcp->obj.co_free = smb_vc_free;
 412         vcp->obj.co_gone = smb_vc_gone;
 413         vcp->vc_number = smb_vcnext++;
 414         vcp->vc_timo = SMB_DEFRQTIMO;
 415         vcp->vc_smbuid = SMB_UID_UNKNOWN;
 416         vcp->vc_mode = vcspec->rights & SMBM_MASK;
 417         vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE);
 418         vcp->vc_tdesc = &smb_tran_nbtcp_desc;
 419         vcp->vc_seqno = 0;
 420         vcp->vc_mackey = NULL;
 421         vcp->vc_mackeylen = 0;
 422
 423         if (uid == SMBM_ANY_OWNER)
 424                 uid = realuid;
 425         if (gid == SMBM_ANY_GROUP)
 426                 gid = cred->cr_groups[0];
 427         vcp->vc_uid = uid;
 428         vcp->vc_grp = gid;
 429
 430         smb_sl_init(&vcp->vc_stlock, "vcstlock");
 431         error = ENOMEM;
 432
 433         vcp->vc_paddr = sodupsockaddr(vcspec->sap, M_WAITOK);
 434         if (vcp->vc_paddr == NULL)
 435                 goto fail;
 436         vcp->vc_laddr = sodupsockaddr(vcspec->lap, M_WAITOK);
 437         if (vcp->vc_laddr == NULL)
 438                 goto fail;
 439         vcp->vc_pass = smb_strdup(vcspec->pass);
 440         if (vcp->vc_pass == NULL)
 441                 goto fail;
 442         vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain :
 443             "NODOMAIN");
 444         if (vcp->vc_domain == NULL)
 445                 goto fail;
 446         vcp->vc_srvname = smb_strdup(vcspec->srvname);
 447         if (vcp->vc_srvname == NULL)
 448                 goto fail;
 449         vcp->vc_username = smb_strdup(vcspec->username);
 450         if (vcp->vc_username == NULL)
 451                 goto fail;
 452         error = (int)iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower);
 453         if (error)
 454                 goto fail;
 455         error = (int)iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper);
 456         if (error)
 457                 goto fail;
 458         if (vcspec->servercs[0]) {
 459                 error = (int)iconv_open(vcspec->servercs, vcspec->localcs,
 460                     &vcp->vc_cp_toserver);
 461                 if (error)
 462                         goto fail;
 463                 error = (int)iconv_open(vcspec->localcs, vcspec->servercs,
 464                     &vcp->vc_cp_tolocal);
 465                 if (error)
 466                         goto fail;
 467                 vcp->vc_toserver = vcp->vc_cp_toserver;
 468                 vcp->vc_tolocal = vcp->vc_cp_tolocal;
 469                 iconv_add(ENCODING_UNICODE, ENCODING_UNICODE, SMB_UNICODE_NAME);
 470                 iconv_add(ENCODING_UNICODE, SMB_UNICODE_NAME, ENCODING_UNICODE);
 471                 error = (int)iconv_open(SMB_UNICODE_NAME, vcspec->localcs,
 472                     &vcp->vc_ucs_toserver);
 473                 if (!error) {
 474                         error = (int)iconv_open(vcspec->localcs, SMB_UNICODE_NAME,
 475                             &vcp->vc_ucs_tolocal);
 476                 }
 477                 if (error) {
 478                         if (vcp->vc_ucs_toserver)
 479                                 iconv_close(vcp->vc_ucs_toserver);
 480                         vcp->vc_ucs_toserver = NULL;
 481                         vcp->vc_ucs_tolocal = NULL;
 482                 }
 483         }
 484         error = (int)smb_iod_create(vcp);
 485         if (error)
 486                 goto fail;
 487         *vcpp = vcp;
 488         smb_co_addchild(&smb_vclist, VCTOCP(vcp));
 489         return (0);
 490
 491  fail:
 492         smb_vc_put(vcp, scred);
 493         return (error);
 494 }
 495
 496 static void
 497 smb_vc_free(struct smb_connobj *cp)
 498 {
 499         struct smb_vc *vcp = CPTOVC(cp);
 500
 501         if (vcp->vc_iod)
 502                 smb_iod_destroy(vcp->vc_iod);
 503         SMB_STRFREE(vcp->vc_username);
 504         SMB_STRFREE(vcp->vc_srvname);
 505         SMB_STRFREE(vcp->vc_pass);
 506         SMB_STRFREE(vcp->vc_domain);
 507         if (vcp->vc_mackey)
 508                 free(vcp->vc_mackey, M_SMBTEMP);
 509         if (vcp->vc_paddr)
 510                 free(vcp->vc_paddr, M_SONAME);
 511         if (vcp->vc_laddr)
 512                 free(vcp->vc_laddr, M_SONAME);
 513         if (vcp->vc_tolower)
 514                 iconv_close(vcp->vc_tolower);
 515         if (vcp->vc_toupper)
 516                 iconv_close(vcp->vc_toupper);
 517         if (vcp->vc_tolocal)
 518                 vcp->vc_tolocal = NULL;
 519         if (vcp->vc_toserver)
 520                 vcp->vc_toserver = NULL;
 521         if (vcp->vc_cp_tolocal)
 522                 iconv_close(vcp->vc_cp_tolocal);
 523         if (vcp->vc_cp_toserver)
 524                 iconv_close(vcp->vc_cp_toserver);
 525         if (vcp->vc_ucs_tolocal)
 526                 iconv_close(vcp->vc_ucs_tolocal);
 527         if (vcp->vc_ucs_toserver)
 528                 iconv_close(vcp->vc_ucs_toserver);
 529         smb_co_done(VCTOCP(vcp));
 530         smb_sl_destroy(&vcp->vc_stlock);
 531         free(vcp, M_SMBCONN);
 532 }
 533
 534 /*
 535  * Called when use count of VC dropped to zero.
 536  */
 537 static void
 538 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred)
 539 {
 540         struct smb_vc *vcp = CPTOVC(cp);
 541
 542         smb_vc_disconnect(vcp);
 543 }
 544
 545 void
 546 smb_vc_ref(struct smb_vc *vcp)
 547 {
 548         smb_co_ref(VCTOCP(vcp));
 549 }
 550
 551 void
 552 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred)
 553 {
 554         smb_co_rele(VCTOCP(vcp), scred);
 555 }
 556
 557 int
 558 smb_vc_get(struct smb_vc *vcp, struct smb_cred *scred)
 559 {
 560         struct smb_connobj *cp;
 561         int error;
 562
 563         cp = VCTOCP(vcp);
 564         sx_xlock(&cp->co_interlock);
 565         error = smb_co_get(cp, scred);
 566         sx_unlock(&cp->co_interlock);
 567         return error;
 568 }
 569
 570 void
 571 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred)
 572 {
 573         smb_co_put(VCTOCP(vcp), scred);
 574 }
 575
 576 int
 577 smb_vc_lock(struct smb_vc *vcp)
 578 {
 579         struct smb_connobj *cp;
 580         int error;
 581
 582         cp = VCTOCP(vcp);
 583         sx_xlock(&cp->co_interlock);
 584         error = smb_co_lock(cp);
 585         sx_unlock(&cp->co_interlock);
 586         return error;
 587 }
 588
 589 void
 590 smb_vc_unlock(struct smb_vc *vcp)
 591 {
 592
 593         struct smb_connobj *cp;
 594
 595         cp = VCTOCP(vcp);
 596         sx_xlock(&cp->co_interlock);
 597         smb_co_unlock(cp);
 598         sx_unlock(&cp->co_interlock);
 599 }
 600
 601 int
 602 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode)
 603 {
 604         struct ucred *cred = scred->scr_cred;
 605
 606         if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid)
 607                 return 0;
 608         mode >>= 3;
 609         if (!groupmember(vcp->vc_grp, cred))
 610                 mode >>= 3;
 611         return (vcp->vc_mode & mode) == mode ? 0 : EACCES;
 612 }
 613
 614 static int
 615 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp)
 616 {
 617         int exact = 1;
 618
 619         if (strcmp(ssp->ss_name, dp->name) != 0)
 620                 return 1;
 621         if (dp->owner != SMBM_ANY_OWNER) {
 622                 if (ssp->ss_uid != dp->owner)
 623                         return 1;
 624         } else
 625                 exact = 0;
 626         if (dp->group != SMBM_ANY_GROUP) {
 627                 if (ssp->ss_grp != dp->group)
 628                         return 1;
 629         } else
 630                 exact = 0;
 631
 632         if (dp->mode & SMBM_EXACT) {
 633                 if (!exact)
 634                         return 1;
 635                 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1;
 636         }
 637         if (smb_share_access(ssp, dp->scred, dp->mode) != 0)
 638                 return 1;
 639         return 0;
 640 }
 641
 642 /*
 643  * Lookup share in the given VC. Share referenced and locked on return.
 644  * VC expected to be locked on entry and will be left locked on exit.
 645  */
 646 int
 647 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp,
 648         struct smb_cred *scred, struct smb_share **sspp)
 649 {
 650         struct smb_connobj *scp = NULL;
 651         struct smb_share *ssp = NULL;
 652         int error;
 653
 654         *sspp = NULL;
 655         dp->scred = scred;
 656         SMBCO_FOREACH(scp, VCTOCP(vcp)) {
 657                 ssp = (struct smb_share *)scp;
 658                 error = smb_share_lock(ssp);
 659                 if (error)
 660                         continue;
 661                 if (smb_vc_cmpshare(ssp, dp) == 0)
 662                         break;
 663                 smb_share_unlock(ssp);
 664         }
 665         if (ssp) {
 666                 smb_share_ref(ssp);
 667                 *sspp = ssp;
 668                 error = 0;
 669         } else
 670                 error = ENOENT;
 671         return error;
 672 }
 673
 674 int
 675 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred)
 676 {
 677
 678         return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL);
 679 }
 680
 681 /*
 682  * Destroy VC to server, invalidate shares linked with it.
 683  * Transport should be locked on entry.
 684  */
 685 int
 686 smb_vc_disconnect(struct smb_vc *vcp)
 687 {
 688
 689         if (vcp->vc_iod != NULL)
 690                 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT |
 691                     SMBIOD_EV_SYNC, NULL);
 692         return 0;
 693 }
 694
 695 static char smb_emptypass[] = "";
 696
 697 const char *
 698 smb_vc_getpass(struct smb_vc *vcp)
 699 {
 700         if (vcp->vc_pass)
 701                 return vcp->vc_pass;
 702         return smb_emptypass;
 703 }
 704
 705 static int
 706 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip)
 707 {
 708         bzero(vip, sizeof(struct smb_vc_info));
 709         vip->itype = SMB_INFO_VC;
 710         vip->usecount = vcp->obj.co_usecount;
 711         vip->uid = vcp->vc_uid;
 712         vip->gid = vcp->vc_grp;
 713         vip->mode = vcp->vc_mode;
 714         vip->flags = vcp->obj.co_flags;
 715         vip->sopt = vcp->vc_sopt;
 716         vip->iodstate = vcp->vc_iod->iod_state;
 717         bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey));
 718         snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname);
 719         snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username);
 720         return 0;
 721 }
 722
 723 u_short
 724 smb_vc_nextmid(struct smb_vc *vcp)
 725 {
 726         u_short r;
 727
 728         sx_xlock(&vcp->obj.co_interlock);
 729         r = vcp->vc_mid++;
 730         sx_unlock(&vcp->obj.co_interlock);
 731         return r;
 732 }
 733
 734 /*
 735  * Share implementation
 736  */
 737 /*
 738  * Allocate share structure and attach it to the given VC
 739  * Connection expected to be locked on entry. Share will be returned
 740  * in locked state.
 741  */
 742 int
 743 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec,
 744         struct smb_cred *scred, struct smb_share **sspp)
 745 {
 746         struct smb_share *ssp;
 747         struct ucred *cred = scred->scr_cred;
 748         uid_t realuid = cred->cr_uid;
 749         uid_t uid = shspec->owner;
 750         gid_t gid = shspec->group;
 751         int error, isroot;
 752
 753         isroot = smb_suser(cred) == 0;
 754         /*
 755          * Only superuser can create shares with different uid and gid
 756          */
 757         if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
 758                 return EPERM;
 759         if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
 760                 return EPERM;
 761         error = smb_vc_lookupshare(vcp, shspec, scred, &ssp);
 762         if (!error) {
 763                 smb_share_put(ssp, scred);
 764                 return EEXIST;
 765         }
 766         if (uid == SMBM_ANY_OWNER)
 767                 uid = realuid;
 768         if (gid == SMBM_ANY_GROUP)
 769                 gid = cred->cr_groups[0];
 770         ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK);
 771         smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss ilock", "smbss");
 772         ssp->obj.co_free = smb_share_free;
 773         ssp->obj.co_gone = smb_share_gone;
 774         smb_sl_init(&ssp->ss_stlock, "ssstlock");
 775         ssp->ss_name = smb_strdup(shspec->name);
 776         if (shspec->pass && shspec->pass[0])
 777                 ssp->ss_pass = smb_strdup(shspec->pass);
 778         ssp->ss_type = shspec->stype;
 779         ssp->ss_tid = SMB_TID_UNKNOWN;
 780         ssp->ss_uid = uid;
 781         ssp->ss_grp = gid;
 782         ssp->ss_mode = shspec->rights & SMBM_MASK;
 783         smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp));
 784         *sspp = ssp;
 785         return 0;
 786 }
 787
 788 static void
 789 smb_share_free(struct smb_connobj *cp)
 790 {
 791         struct smb_share *ssp = CPTOSS(cp);
 792
 793         SMB_STRFREE(ssp->ss_name);
 794         SMB_STRFREE(ssp->ss_pass);
 795         smb_sl_destroy(&ssp->ss_stlock);
 796         smb_co_done(SSTOCP(ssp));
 797         free(ssp, M_SMBCONN);
 798 }
 799
 800 static void
 801 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred)
 802 {
 803         struct smb_share *ssp = CPTOSS(cp);
 804
 805         smb_smb_treedisconnect(ssp, scred);
 806 }
 807
 808 void
 809 smb_share_ref(struct smb_share *ssp)
 810 {
 811         smb_co_ref(SSTOCP(ssp));
 812 }
 813
 814 void
 815 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred)
 816 {
 817         smb_co_rele(SSTOCP(ssp), scred);
 818 }
 819
 820 int
 821 smb_share_get(struct smb_share *ssp, struct smb_cred *scred)
 822 {
 823         struct smb_connobj *cp = SSTOCP(ssp);
 824         int error;
 825
 826         sx_xlock(&cp->co_interlock);
 827         error = smb_co_get(cp, scred);
 828         sx_unlock(&cp->co_interlock);
 829         return error;
 830 }
 831
 832 void
 833 smb_share_put(struct smb_share *ssp, struct smb_cred *scred)
 834 {
 835
 836         smb_co_put(SSTOCP(ssp), scred);
 837 }
 838
 839 int
 840 smb_share_lock(struct smb_share *ssp)
 841 {
 842         struct smb_connobj *cp;
 843         int error;
 844
 845         cp = SSTOCP(ssp);
 846         sx_xlock(&cp->co_interlock);
 847         error = smb_co_lock(cp);
 848         sx_unlock(&cp->co_interlock);
 849         return error;
 850 }
 851
 852 void
 853 smb_share_unlock(struct smb_share *ssp)
 854 {
 855         struct smb_connobj *cp;
 856
 857         cp = SSTOCP(ssp);
 858         sx_xlock(&cp->co_interlock);
 859         smb_co_unlock(cp);
 860         sx_unlock(&cp->co_interlock);
 861 }
 862
 863 int
 864 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode)
 865 {
 866         struct ucred *cred = scred->scr_cred;
 867
 868         if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid)
 869                 return 0;
 870         mode >>= 3;
 871         if (!groupmember(ssp->ss_grp, cred))
 872                 mode >>= 3;
 873         return (ssp->ss_mode & mode) == mode ? 0 : EACCES;
 874 }
 875
 876 void
 877 smb_share_invalidate(struct smb_share *ssp)
 878 {
 879         ssp->ss_tid = SMB_TID_UNKNOWN;
 880 }
 881
 882 int
 883 smb_share_valid(struct smb_share *ssp)
 884 {
 885         return ssp->ss_tid != SMB_TID_UNKNOWN &&
 886             ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid;
 887 }
 888
 889 const char*
 890 smb_share_getpass(struct smb_share *ssp)
 891 {
 892         struct smb_vc *vcp;
 893
 894         if (ssp->ss_pass)
 895                 return ssp->ss_pass;
 896         vcp = SSTOVC(ssp);
 897         if (vcp->vc_pass)
 898                 return vcp->vc_pass;
 899         return smb_emptypass;
 900 }
 901
 902 static int
 903 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip)
 904 {
 905         bzero(sip, sizeof(struct smb_share_info));
 906         sip->itype = SMB_INFO_SHARE;
 907         sip->usecount = ssp->obj.co_usecount;
 908         sip->tid  = ssp->ss_tid;
 909         sip->type= ssp->ss_type;
 910         sip->uid = ssp->ss_uid;
 911         sip->gid = ssp->ss_grp;
 912         sip->mode= ssp->ss_mode;
 913         sip->flags = ssp->obj.co_flags;
 914         snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name);
 915         return 0;
 916 }
 917
 918 /*
 919  * Dump an entire tree into sysctl call
 920  */
 921 static int
 922 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS)
 923 {
 924         struct smb_connobj *scp1, *scp2;
 925         struct smb_vc *vcp;
 926         struct smb_share *ssp;
 927         struct smb_vc_info vci;
 928         struct smb_share_info ssi;
 929         int error, itype;
 930
 931         error = sysctl_wire_old_buffer(req, 0);
 932         if (error)
 933                 return (error);
 934         error = smb_sm_lockvclist();
 935         if (error)
 936                 return error;
 937         SMBCO_FOREACH(scp1, &smb_vclist) {
 938                 vcp = (struct smb_vc *)scp1;
 939                 error = smb_vc_lock(vcp);
 940                 if (error)
 941                         continue;
 942                 smb_vc_getinfo(vcp, &vci);
 943                 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info));
 944                 if (error) {
 945                         smb_vc_unlock(vcp);
 946                         break;
 947                 }
 948                 SMBCO_FOREACH(scp2, VCTOCP(vcp)) {
 949                         ssp = (struct smb_share *)scp2;
 950                         error = smb_share_lock(ssp);
 951                         if (error) {
 952                                 error = 0;
 953                                 continue;
 954                         }
 955                         smb_share_getinfo(ssp, &ssi);
 956                         smb_share_unlock(ssp);
 957                         error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info));
 958                         if (error)
 959                                 break;
 960                 }
 961                 smb_vc_unlock(vcp);
 962                 if (error)
 963                         break;
 964         }
 965         if (!error) {
 966                 itype = SMB_INFO_NONE;
 967                 error = SYSCTL_OUT(req, &itype, sizeof(itype));
 968         }
 969         smb_sm_unlockvclist();
 970         return error;
 971 }