sys/netsmb/smb_conn.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   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 __FBSDID("$FreeBSD$");
  35
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/kernel.h>
  39 #include <sys/malloc.h>
  40 #include <sys/priv.h>
  41 #include <sys/proc.h>
  42 #include <sys/lock.h>
  43 #include <sys/sysctl.h>
  44 #include <sys/socketvar.h>
  45
  46 #include <sys/iconv.h>
  47
  48 #include <netsmb/smb.h>
  49 #include <netsmb/smb_subr.h>
  50 #include <netsmb/smb_conn.h>
  51 #include <netsmb/smb_tran.h>
  52 #include <netsmb/smb_trantcp.h>
  53
  54 static struct smb_connobj smb_vclist;
  55 static int smb_vcnext = 1;      /* next unique id for VC */
  56
  57 SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol");
  58
  59 static MALLOC_DEFINE(M_SMBCONN, "smb_conn", "SMB connection");
  60
  61 static void smb_co_init(struct smb_connobj *cp, int level, char *ilockname,
  62     char *lockname);
  63 static void smb_co_done(struct smb_connobj *cp);
  64 static int  smb_vc_disconnect(struct smb_vc *vcp);
  65 static void smb_vc_free(struct smb_connobj *cp);
  66 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred);
  67 static smb_co_free_t smb_share_free;
  68 static smb_co_gone_t smb_share_gone;
  69
  70 static int  smb_sysctl_treedump(SYSCTL_HANDLER_ARGS);
  71
  72 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE,
  73             NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree");
  74
  75 int
  76 smb_sm_init(void)
  77 {
  78
  79         smb_co_init(&smb_vclist, SMBL_SM, "smbsm ilock", "smbsm");
  80         sx_xlock(&smb_vclist.co_interlock);
  81         smb_co_unlock(&smb_vclist);
  82         sx_unlock(&smb_vclist.co_interlock);
  83         return 0;
  84 }
  85
  86 int
  87 smb_sm_done(void)
  88 {
  89
  90         /* XXX: hold the mutex */
  91         if (smb_vclist.co_usecount > 1) {
  92                 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1);
  93                 return EBUSY;
  94         }
  95         smb_co_done(&smb_vclist);
  96         return 0;
  97 }
  98
  99 static int
 100 smb_sm_lockvclist(void)
 101 {
 102         int error;
 103
 104         sx_xlock(&smb_vclist.co_interlock);
 105         error = smb_co_lock(&smb_vclist);
 106         sx_unlock(&smb_vclist.co_interlock);
 107
 108         return error;
 109 }
 110
 111 static void
 112 smb_sm_unlockvclist(void)
 113 {
 114
 115         sx_xlock(&smb_vclist.co_interlock);
 116         smb_co_unlock(&smb_vclist);
 117         sx_unlock(&smb_vclist.co_interlock);
 118 }
 119
 120 static int
 121 smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
 122         struct smb_cred *scred, struct smb_vc **vcpp)
 123 {
 124         struct smb_connobj *scp;
 125         struct smb_vc *vcp;
 126         int exact = 1;
 127         int error;
 128
 129         vcspec->shspec = shspec;
 130         error = ENOENT;
 131         vcp = NULL;
 132         SMBCO_FOREACH(scp, &smb_vclist) {
 133                 vcp = (struct smb_vc *)scp;
 134                 error = smb_vc_lock(vcp);
 135                 if (error)
 136                         continue;
 137
 138                 if ((vcp->obj.co_flags & SMBV_PRIVATE) ||
 139                     !CONNADDREQ(vcp->vc_paddr, vcspec->sap) ||
 140                     strcmp(vcp->vc_username, vcspec->username) != 0)
 141                         goto err1;
 142                 if (vcspec->owner != SMBM_ANY_OWNER) {
 143                         if (vcp->vc_uid != vcspec->owner)
 144                                 goto err1;
 145                 } else
 146                         exact = 0;
 147                 if (vcspec->group != SMBM_ANY_GROUP) {
 148                         if (vcp->vc_grp != vcspec->group)
 149                                 goto err1;
 150                 } else
 151                         exact = 0;
 152                 if (vcspec->mode & SMBM_EXACT) {
 153                         if (!exact || (vcspec->mode & SMBM_MASK) !=
 154                             vcp->vc_mode)
 155                                 goto err1;
 156                 }
 157                 if (smb_vc_access(vcp, scred, vcspec->mode) != 0)
 158                         goto err1;
 159                 vcspec->ssp = NULL;
 160                 if (shspec) {
 161                         error = (int)smb_vc_lookupshare(vcp, shspec, scred,
 162                             &vcspec->ssp);
 163                         if (error)
 164                                 goto fail;
 165                 }
 166                 error = 0;
 167                 break;
 168         err1:
 169                 error = 1;
 170         fail:
 171                 smb_vc_unlock(vcp);
 172         }
 173         if (vcp) {
 174                 smb_vc_ref(vcp);
 175                 *vcpp = vcp;
 176         }
 177         return (error);
 178 }
 179
 180 int
 181 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
 182         struct smb_cred *scred, struct smb_vc **vcpp)
 183 {
 184         struct smb_vc *vcp;
 185         struct smb_share *ssp = NULL;
 186         int error;
 187
 188         *vcpp = vcp = NULL;
 189
 190         error = smb_sm_lockvclist();
 191         if (error)
 192                 return error;
 193         error = smb_sm_lookupint(vcspec, shspec, scred, vcpp);
 194         if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) {
 195                 smb_sm_unlockvclist();
 196                 return error;
 197         }
 198         error = smb_sm_lookupint(vcspec, NULL, scred, &vcp);
 199         if (error) {
 200                 error = smb_vc_create(vcspec, scred, &vcp);
 201                 if (error)
 202                         goto out;
 203                 error = smb_vc_connect(vcp, scred);
 204                 if (error)
 205                         goto out;
 206         }
 207         if (shspec == NULL)
 208                 goto out;
 209         error = smb_share_create(vcp, shspec, scred, &ssp);
 210         if (error)
 211                 goto out;
 212         error = smb_smb_treeconnect(ssp, scred);
 213         if (error == 0)
 214                 vcspec->ssp = ssp;
 215         else
 216                 smb_share_put(ssp, scred);
 217 out:
 218         smb_sm_unlockvclist();
 219         if (error == 0)
 220                 *vcpp = vcp;
 221         else if (vcp) {
 222                 smb_vc_lock(vcp);
 223                 smb_vc_put(vcp, scred);
 224         }
 225         return error;
 226 }
 227
 228 /*
 229  * Common code for connection object
 230  */
 231 static void
 232 smb_co_init(struct smb_connobj *cp, int level, char *ilockname, char *lockname)
 233 {
 234         SLIST_INIT(&cp->co_children);
 235         sx_init_flags(&cp->co_interlock, ilockname, SX_RECURSE);
 236         cv_init(&cp->co_lock, "smblock");
 237         cp->co_lockcnt = 0;
 238         cp->co_locker = NULL;
 239         cp->co_level = level;
 240         cp->co_usecount = 1;
 241         sx_xlock(&cp->co_interlock);
 242         smb_co_lock(cp);
 243         sx_unlock(&cp->co_interlock);
 244 }
 245
 246 static void
 247 smb_co_done(struct smb_connobj *cp)
 248 {
 249
 250         sx_destroy(&cp->co_interlock);
 251         cv_destroy(&cp->co_lock);
 252         cp->co_locker = NULL;
 253         cp->co_flags = 0;
 254         cp->co_lockcnt = 0;
 255 }
 256
 257 static void
 258 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred)
 259 {
 260         struct smb_connobj *parent;
 261
 262         if (cp->co_gone)
 263                 cp->co_gone(cp, scred);
 264         parent = cp->co_parent;
 265         if (parent) {
 266                 sx_xlock(&parent->co_interlock);
 267                 smb_co_lock(parent);
 268                 sx_unlock(&parent->co_interlock);
 269                 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next);
 270                 smb_co_put(parent, scred);
 271         }
 272         if (cp->co_free)
 273                 cp->co_free(cp);
 274 }
 275
 276 void
 277 smb_co_ref(struct smb_connobj *cp)
 278 {
 279
 280         sx_xlock(&cp->co_interlock);
 281         cp->co_usecount++;
 282         sx_unlock(&cp->co_interlock);
 283 }
 284
 285 void
 286 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred)
 287 {
 288
 289         sx_xlock(&cp->co_interlock);
 290         smb_co_unlock(cp);
 291         if (cp->co_usecount > 1) {
 292                 cp->co_usecount--;
 293                 sx_unlock(&cp->co_interlock);
 294                 return;
 295         }
 296         if (cp->co_usecount == 0) {
 297                 SMBERROR("negative use_count for object %d", cp->co_level);
 298                 sx_unlock(&cp->co_interlock);
 299                 return;
 300         }
 301         cp->co_usecount--;
 302         cp->co_flags |= SMBO_GONE;
 303         sx_unlock(&cp->co_interlock);
 304         smb_co_gone(cp, scred);
 305 }
 306
 307 int
 308 smb_co_get(struct smb_connobj *cp, struct smb_cred *scred)
 309 {
 310         int error;
 311
 312         MPASS(sx_xholder(&cp->co_interlock) == curthread);
 313         cp->co_usecount++;
 314         error = smb_co_lock(cp);
 315         if (error)
 316                 cp->co_usecount--;
 317         return error;
 318 }
 319
 320 void
 321 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred)
 322 {
 323
 324         sx_xlock(&cp->co_interlock);
 325         if (cp->co_usecount > 1) {
 326                 cp->co_usecount--;
 327         } else if (cp->co_usecount == 1) {
 328                 cp->co_usecount--;
 329                 cp->co_flags |= SMBO_GONE;
 330         } else {
 331                 SMBERROR("negative usecount");
 332         }
 333         smb_co_unlock(cp);
 334         sx_unlock(&cp->co_interlock);
 335         if ((cp->co_flags & SMBO_GONE) == 0)
 336                 return;
 337         smb_co_gone(cp, scred);
 338 }
 339
 340 int
 341 smb_co_lock(struct smb_connobj *cp)
 342 {
 343
 344         MPASS(sx_xholder(&cp->co_interlock) == curthread);
 345         for (;;) {
 346                 if (cp->co_flags & SMBO_GONE)
 347                         return EINVAL;
 348                 if (cp->co_locker == NULL) {
 349                         cp->co_locker = curthread;
 350                         return 0;
 351                 }
 352                 if (cp->co_locker == curthread) {
 353                         cp->co_lockcnt++;
 354                         return 0;
 355                 }
 356                 cv_wait(&cp->co_lock, &cp->co_interlock);
 357         }
 358 }
 359
 360 void
 361 smb_co_unlock(struct smb_connobj *cp)
 362 {
 363
 364         MPASS(sx_xholder(&cp->co_interlock) == curthread);
 365         MPASS(cp->co_locker == curthread);
 366         if (cp->co_lockcnt != 0) {
 367                 cp->co_lockcnt--;
 368                 return;
 369         }
 370         cp->co_locker = NULL;
 371         cv_signal(&cp->co_lock);
 372 }
 373
 374 static void
 375 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child)
 376 {
 377
 378         smb_co_ref(parent);
 379         SLIST_INSERT_HEAD(&parent->co_children, child, co_next);
 380         child->co_parent = parent;
 381 }
 382
 383 /*
 384  * Session implementation
 385  */
 386
 387 int
 388 smb_vc_create(struct smb_vcspec *vcspec,
 389         struct smb_cred *scred, struct smb_vc **vcpp)
 390 {
 391         struct smb_vc *vcp;
 392         struct ucred *cred = scred->scr_cred;
 393         uid_t uid = vcspec->owner;
 394         gid_t gid = vcspec->group;
 395         uid_t realuid = cred->cr_uid;
 396         char *domain = vcspec->domain;
 397         int error, isroot;
 398
 399         isroot = smb_suser(cred) == 0;
 400         /*
 401          * Only superuser can create VCs with different uid and gid
 402          */
 403         if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
 404                 return EPERM;
 405         if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
 406                 return EPERM;
 407
 408         vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK);
 409         smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc ilock", "smb_vc");
 410         vcp->obj.co_free = smb_vc_free;
 411         vcp->obj.co_gone = smb_vc_gone;
 412         vcp->vc_number = smb_vcnext++;
 413         vcp->vc_timo = SMB_DEFRQTIMO;
 414         vcp->vc_smbuid = SMB_UID_UNKNOWN;
 415         vcp->vc_mode = vcspec->rights & SMBM_MASK;
 416         vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE);
 417         vcp->vc_tdesc = &smb_tran_nbtcp_desc;
 418         vcp->vc_seqno = 0;
 419         vcp->vc_mackey = NULL;
 420         vcp->vc_mackeylen = 0;
 421
 422         if (uid == SMBM_ANY_OWNER)
 423                 uid = realuid;
 424         if (gid == SMBM_ANY_GROUP)
 425                 gid = cred->cr_groups[0];
 426         vcp->vc_uid = uid;
 427         vcp->vc_grp = gid;
 428
 429         smb_sl_init(&vcp->vc_stlock, "vcstlock");
 430         error = ENOMEM;
 431
 432         vcp->vc_paddr = sodupsockaddr(vcspec->sap, M_WAITOK);
 433         if (vcp->vc_paddr == NULL)
 434                 goto fail;
 435         vcp->vc_laddr = sodupsockaddr(vcspec->lap, M_WAITOK);
 436         if (vcp->vc_laddr == NULL)
 437                 goto fail;
 438         vcp->vc_pass = smb_strdup(vcspec->pass);
 439         if (vcp->vc_pass == NULL)
 440                 goto fail;
 441         vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain :
 442             "NODOMAIN");
 443         if (vcp->vc_domain == NULL)
 444                 goto fail;
 445         vcp->vc_srvname = smb_strdup(vcspec->srvname);
 446         if (vcp->vc_srvname == NULL)
 447                 goto fail;
 448         vcp->vc_username = smb_strdup(vcspec->username);
 449         if (vcp->vc_username == NULL)
 450                 goto fail;
 451         error = (int)iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower);
 452         if (error)
 453                 goto fail;
 454         error = (int)iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper);
 455         if (error)
 456                 goto fail;
 457         if (vcspec->servercs[0]) {
 458                 error = (int)iconv_open(vcspec->servercs, vcspec->localcs,
 459                     &vcp->vc_cp_toserver);
 460                 if (error)
 461                         goto fail;
 462                 error = (int)iconv_open(vcspec->localcs, vcspec->servercs,
 463                     &vcp->vc_cp_tolocal);
 464                 if (error)
 465                         goto fail;
 466                 vcp->vc_toserver = vcp->vc_cp_toserver;
 467                 vcp->vc_tolocal = vcp->vc_cp_tolocal;
 468                 iconv_add(ENCODING_UNICODE, ENCODING_UNICODE, SMB_UNICODE_NAME);
 469                 iconv_add(ENCODING_UNICODE, SMB_UNICODE_NAME, ENCODING_UNICODE);
 470                 error = (int)iconv_open(SMB_UNICODE_NAME, vcspec->localcs,
 471                     &vcp->vc_ucs_toserver);
 472                 if (!error) {
 473                         error = (int)iconv_open(vcspec->localcs, SMB_UNICODE_NAME,
 474                             &vcp->vc_ucs_tolocal);
 475                 }
 476                 if (error) {
 477                         if (vcp->vc_ucs_toserver)
 478                                 iconv_close(vcp->vc_ucs_toserver);
 479                         vcp->vc_ucs_toserver = NULL;
 480                         vcp->vc_ucs_tolocal = NULL;
 481                 }
 482         }
 483         error = (int)smb_iod_create(vcp);
 484         if (error)
 485                 goto fail;
 486         *vcpp = vcp;
 487         smb_co_addchild(&smb_vclist, VCTOCP(vcp));
 488         return (0);
 489
 490  fail:
 491         smb_vc_put(vcp, scred);
 492         return (error);
 493 }
 494
 495 static void
 496 smb_vc_free(struct smb_connobj *cp)
 497 {
 498         struct smb_vc *vcp = CPTOVC(cp);
 499
 500         if (vcp->vc_iod)
 501                 smb_iod_destroy(vcp->vc_iod);
 502         SMB_STRFREE(vcp->vc_username);
 503         SMB_STRFREE(vcp->vc_srvname);
 504         SMB_STRFREE(vcp->vc_pass);
 505         SMB_STRFREE(vcp->vc_domain);
 506         if (vcp->vc_mackey)
 507                 free(vcp->vc_mackey, M_SMBTEMP);
 508         if (vcp->vc_paddr)
 509                 free(vcp->vc_paddr, M_SONAME);
 510         if (vcp->vc_laddr)
 511                 free(vcp->vc_laddr, M_SONAME);
 512         if (vcp->vc_tolower)
 513                 iconv_close(vcp->vc_tolower);
 514         if (vcp->vc_toupper)
 515                 iconv_close(vcp->vc_toupper);
 516         if (vcp->vc_tolocal)
 517                 vcp->vc_tolocal = NULL;
 518         if (vcp->vc_toserver)
 519                 vcp->vc_toserver = NULL;
 520         if (vcp->vc_cp_tolocal)
 521                 iconv_close(vcp->vc_cp_tolocal);
 522         if (vcp->vc_cp_toserver)
 523                 iconv_close(vcp->vc_cp_toserver);
 524         if (vcp->vc_ucs_tolocal)
 525                 iconv_close(vcp->vc_ucs_tolocal);
 526         if (vcp->vc_ucs_toserver)
 527                 iconv_close(vcp->vc_ucs_toserver);
 528         smb_co_done(VCTOCP(vcp));
 529         smb_sl_destroy(&vcp->vc_stlock);
 530         free(vcp, M_SMBCONN);
 531 }
 532
 533 /*
 534  * Called when use count of VC dropped to zero.
 535  */
 536 static void
 537 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred)
 538 {
 539         struct smb_vc *vcp = CPTOVC(cp);
 540
 541         smb_vc_disconnect(vcp);
 542 }
 543
 544 void
 545 smb_vc_ref(struct smb_vc *vcp)
 546 {
 547         smb_co_ref(VCTOCP(vcp));
 548 }
 549
 550 void
 551 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred)
 552 {
 553         smb_co_rele(VCTOCP(vcp), scred);
 554 }
 555
 556 int
 557 smb_vc_get(struct smb_vc *vcp, struct smb_cred *scred)
 558 {
 559         struct smb_connobj *cp;
 560         int error;
 561
 562         cp = VCTOCP(vcp);
 563         sx_xlock(&cp->co_interlock);
 564         error = smb_co_get(cp, scred);
 565         sx_unlock(&cp->co_interlock);
 566         return error;
 567 }
 568
 569 void
 570 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred)
 571 {
 572         smb_co_put(VCTOCP(vcp), scred);
 573 }
 574
 575 int
 576 smb_vc_lock(struct smb_vc *vcp)
 577 {
 578         struct smb_connobj *cp;
 579         int error;
 580
 581         cp = VCTOCP(vcp);
 582         sx_xlock(&cp->co_interlock);
 583         error = smb_co_lock(cp);
 584         sx_unlock(&cp->co_interlock);
 585         return error;
 586 }
 587
 588 void
 589 smb_vc_unlock(struct smb_vc *vcp)
 590 {
 591
 592         struct smb_connobj *cp;
 593
 594         cp = VCTOCP(vcp);
 595         sx_xlock(&cp->co_interlock);
 596         smb_co_unlock(cp);
 597         sx_unlock(&cp->co_interlock);
 598 }
 599
 600 int
 601 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode)
 602 {
 603         struct ucred *cred = scred->scr_cred;
 604
 605         if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid)
 606                 return 0;
 607         mode >>= 3;
 608         if (!groupmember(vcp->vc_grp, cred))
 609                 mode >>= 3;
 610         return (vcp->vc_mode & mode) == mode ? 0 : EACCES;
 611 }
 612
 613 static int
 614 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp)
 615 {
 616         int exact = 1;
 617
 618         if (strcmp(ssp->ss_name, dp->name) != 0)
 619                 return 1;
 620         if (dp->owner != SMBM_ANY_OWNER) {
 621                 if (ssp->ss_uid != dp->owner)
 622                         return 1;
 623         } else
 624                 exact = 0;
 625         if (dp->group != SMBM_ANY_GROUP) {
 626                 if (ssp->ss_grp != dp->group)
 627                         return 1;
 628         } else
 629                 exact = 0;
 630
 631         if (dp->mode & SMBM_EXACT) {
 632                 if (!exact)
 633                         return 1;
 634                 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1;
 635         }
 636         if (smb_share_access(ssp, dp->scred, dp->mode) != 0)
 637                 return 1;
 638         return 0;
 639 }
 640
 641 /*
 642  * Lookup share in the given VC. Share referenced and locked on return.
 643  * VC expected to be locked on entry and will be left locked on exit.
 644  */
 645 int
 646 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp,
 647         struct smb_cred *scred, struct smb_share **sspp)
 648 {
 649         struct smb_connobj *scp = NULL;
 650         struct smb_share *ssp = NULL;
 651         int error;
 652
 653         *sspp = NULL;
 654         dp->scred = scred;
 655         SMBCO_FOREACH(scp, VCTOCP(vcp)) {
 656                 ssp = (struct smb_share *)scp;
 657                 error = smb_share_lock(ssp);
 658                 if (error)
 659                         continue;
 660                 if (smb_vc_cmpshare(ssp, dp) == 0)
 661                         break;
 662                 smb_share_unlock(ssp);
 663         }
 664         if (ssp) {
 665                 smb_share_ref(ssp);
 666                 *sspp = ssp;
 667                 error = 0;
 668         } else
 669                 error = ENOENT;
 670         return error;
 671 }
 672
 673 int
 674 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred)
 675 {
 676
 677         return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL);
 678 }
 679
 680 /*
 681  * Destroy VC to server, invalidate shares linked with it.
 682  * Transport should be locked on entry.
 683  */
 684 int
 685 smb_vc_disconnect(struct smb_vc *vcp)
 686 {
 687
 688         if (vcp->vc_iod != NULL)
 689                 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT |
 690                     SMBIOD_EV_SYNC, NULL);
 691         return 0;
 692 }
 693
 694 static char smb_emptypass[] = "";
 695
 696 const char *
 697 smb_vc_getpass(struct smb_vc *vcp)
 698 {
 699         if (vcp->vc_pass)
 700                 return vcp->vc_pass;
 701         return smb_emptypass;
 702 }
 703
 704 static int
 705 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip)
 706 {
 707         bzero(vip, sizeof(struct smb_vc_info));
 708         vip->itype = SMB_INFO_VC;
 709         vip->usecount = vcp->obj.co_usecount;
 710         vip->uid = vcp->vc_uid;
 711         vip->gid = vcp->vc_grp;
 712         vip->mode = vcp->vc_mode;
 713         vip->flags = vcp->obj.co_flags;
 714         vip->sopt = vcp->vc_sopt;
 715         vip->iodstate = vcp->vc_iod->iod_state;
 716         bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey));
 717         snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname);
 718         snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username);
 719         return 0;
 720 }
 721
 722 u_short
 723 smb_vc_nextmid(struct smb_vc *vcp)
 724 {
 725         u_short r;
 726
 727         sx_xlock(&vcp->obj.co_interlock);
 728         r = vcp->vc_mid++;
 729         sx_unlock(&vcp->obj.co_interlock);
 730         return r;
 731 }
 732
 733 /*
 734  * Share implementation
 735  */
 736 /*
 737  * Allocate share structure and attach it to the given VC
 738  * Connection expected to be locked on entry. Share will be returned
 739  * in locked state.
 740  */
 741 int
 742 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec,
 743         struct smb_cred *scred, struct smb_share **sspp)
 744 {
 745         struct smb_share *ssp;
 746         struct ucred *cred = scred->scr_cred;
 747         uid_t realuid = cred->cr_uid;
 748         uid_t uid = shspec->owner;
 749         gid_t gid = shspec->group;
 750         int error, isroot;
 751
 752         isroot = smb_suser(cred) == 0;
 753         /*
 754          * Only superuser can create shares with different uid and gid
 755          */
 756         if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
 757                 return EPERM;
 758         if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
 759                 return EPERM;
 760         error = smb_vc_lookupshare(vcp, shspec, scred, &ssp);
 761         if (!error) {
 762                 smb_share_put(ssp, scred);
 763                 return EEXIST;
 764         }
 765         if (uid == SMBM_ANY_OWNER)
 766                 uid = realuid;
 767         if (gid == SMBM_ANY_GROUP)
 768                 gid = cred->cr_groups[0];
 769         ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK);
 770         smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss ilock", "smbss");
 771         ssp->obj.co_free = smb_share_free;
 772         ssp->obj.co_gone = smb_share_gone;
 773         smb_sl_init(&ssp->ss_stlock, "ssstlock");
 774         ssp->ss_name = smb_strdup(shspec->name);
 775         if (shspec->pass && shspec->pass[0])
 776                 ssp->ss_pass = smb_strdup(shspec->pass);
 777         ssp->ss_type = shspec->stype;
 778         ssp->ss_tid = SMB_TID_UNKNOWN;
 779         ssp->ss_uid = uid;
 780         ssp->ss_grp = gid;
 781         ssp->ss_mode = shspec->rights & SMBM_MASK;
 782         smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp));
 783         *sspp = ssp;
 784         return 0;
 785 }
 786
 787 static void
 788 smb_share_free(struct smb_connobj *cp)
 789 {
 790         struct smb_share *ssp = CPTOSS(cp);
 791
 792         SMB_STRFREE(ssp->ss_name);
 793         SMB_STRFREE(ssp->ss_pass);
 794         smb_sl_destroy(&ssp->ss_stlock);
 795         smb_co_done(SSTOCP(ssp));
 796         free(ssp, M_SMBCONN);
 797 }
 798
 799 static void
 800 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred)
 801 {
 802         struct smb_share *ssp = CPTOSS(cp);
 803
 804         smb_smb_treedisconnect(ssp, scred);
 805 }
 806
 807 void
 808 smb_share_ref(struct smb_share *ssp)
 809 {
 810         smb_co_ref(SSTOCP(ssp));
 811 }
 812
 813 void
 814 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred)
 815 {
 816         smb_co_rele(SSTOCP(ssp), scred);
 817 }
 818
 819 int
 820 smb_share_get(struct smb_share *ssp, struct smb_cred *scred)
 821 {
 822         struct smb_connobj *cp = SSTOCP(ssp);
 823         int error;
 824
 825         sx_xlock(&cp->co_interlock);
 826         error = smb_co_get(cp, scred);
 827         sx_unlock(&cp->co_interlock);
 828         return error;
 829 }
 830
 831 void
 832 smb_share_put(struct smb_share *ssp, struct smb_cred *scred)
 833 {
 834
 835         smb_co_put(SSTOCP(ssp), scred);
 836 }
 837
 838 int
 839 smb_share_lock(struct smb_share *ssp)
 840 {
 841         struct smb_connobj *cp;
 842         int error;
 843
 844         cp = SSTOCP(ssp);
 845         sx_xlock(&cp->co_interlock);
 846         error = smb_co_lock(cp);
 847         sx_unlock(&cp->co_interlock);
 848         return error;
 849 }
 850
 851 void
 852 smb_share_unlock(struct smb_share *ssp)
 853 {
 854         struct smb_connobj *cp;
 855
 856         cp = SSTOCP(ssp);
 857         sx_xlock(&cp->co_interlock);
 858         smb_co_unlock(cp);
 859         sx_unlock(&cp->co_interlock);
 860 }
 861
 862 int
 863 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode)
 864 {
 865         struct ucred *cred = scred->scr_cred;
 866
 867         if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid)
 868                 return 0;
 869         mode >>= 3;
 870         if (!groupmember(ssp->ss_grp, cred))
 871                 mode >>= 3;
 872         return (ssp->ss_mode & mode) == mode ? 0 : EACCES;
 873 }
 874
 875 void
 876 smb_share_invalidate(struct smb_share *ssp)
 877 {
 878         ssp->ss_tid = SMB_TID_UNKNOWN;
 879 }
 880
 881 int
 882 smb_share_valid(struct smb_share *ssp)
 883 {
 884         return ssp->ss_tid != SMB_TID_UNKNOWN &&
 885             ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid;
 886 }
 887
 888 const char*
 889 smb_share_getpass(struct smb_share *ssp)
 890 {
 891         struct smb_vc *vcp;
 892
 893         if (ssp->ss_pass)
 894                 return ssp->ss_pass;
 895         vcp = SSTOVC(ssp);
 896         if (vcp->vc_pass)
 897                 return vcp->vc_pass;
 898         return smb_emptypass;
 899 }
 900
 901 static int
 902 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip)
 903 {
 904         bzero(sip, sizeof(struct smb_share_info));
 905         sip->itype = SMB_INFO_SHARE;
 906         sip->usecount = ssp->obj.co_usecount;
 907         sip->tid  = ssp->ss_tid;
 908         sip->type= ssp->ss_type;
 909         sip->uid = ssp->ss_uid;
 910         sip->gid = ssp->ss_grp;
 911         sip->mode= ssp->ss_mode;
 912         sip->flags = ssp->obj.co_flags;
 913         snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name);
 914         return 0;
 915 }
 916
 917 /*
 918  * Dump an entire tree into sysctl call
 919  */
 920 static int
 921 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS)
 922 {
 923         struct smb_connobj *scp1, *scp2;
 924         struct smb_vc *vcp;
 925         struct smb_share *ssp;
 926         struct smb_vc_info vci;
 927         struct smb_share_info ssi;
 928         int error, itype;
 929
 930         error = sysctl_wire_old_buffer(req, 0);
 931         if (error)
 932                 return (error);
 933         error = smb_sm_lockvclist();
 934         if (error)
 935                 return error;
 936         SMBCO_FOREACH(scp1, &smb_vclist) {
 937                 vcp = (struct smb_vc *)scp1;
 938                 error = smb_vc_lock(vcp);
 939                 if (error)
 940                         continue;
 941                 smb_vc_getinfo(vcp, &vci);
 942                 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info));
 943                 if (error) {
 944                         smb_vc_unlock(vcp);
 945                         break;
 946                 }
 947                 SMBCO_FOREACH(scp2, VCTOCP(vcp)) {
 948                         ssp = (struct smb_share *)scp2;
 949                         error = smb_share_lock(ssp);
 950                         if (error) {
 951                                 error = 0;
 952                                 continue;
 953                         }
 954                         smb_share_getinfo(ssp, &ssi);
 955                         smb_share_unlock(ssp);
 956                         error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info));
 957                         if (error)
 958                                 break;
 959                 }
 960                 smb_vc_unlock(vcp);
 961                 if (error)
 962                         break;
 963         }
 964         if (!error) {
 965                 itype = SMB_INFO_NONE;
 966                 error = SYSCTL_OUT(req, &itype, sizeof(itype));
 967         }
 968         smb_sm_unlockvclist();
 969         return error;
 970 }