The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netsmb/smb_conn.c

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    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  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *    This product includes software developed by Boris Popov.
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 /*
   34  * Connection engine.
   35  */
   36 
   37 #include <sys/cdefs.h>
   38 __FBSDID("$FreeBSD$");
   39 
   40 #include <sys/param.h>
   41 #include <sys/systm.h>
   42 #include <sys/kernel.h>
   43 #include <sys/malloc.h>
   44 #include <sys/proc.h>
   45 #include <sys/lock.h>
   46 #include <sys/sysctl.h>
   47 #include <sys/socketvar.h>
   48 
   49 #include <sys/iconv.h>
   50 
   51 #include <netsmb/smb.h>
   52 #include <netsmb/smb_subr.h>
   53 #include <netsmb/smb_conn.h>
   54 #include <netsmb/smb_tran.h>
   55 #include <netsmb/smb_trantcp.h>
   56 
   57 static struct smb_connobj smb_vclist;
   58 static int smb_vcnext = 1;      /* next unique id for VC */
   59 
   60 extern struct linker_set sysctl_net_smb;
   61 
   62 SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol");
   63 
   64 MALLOC_DEFINE(M_SMBCONN, "SMB conn", "SMB connection");
   65 
   66 static void smb_co_init(struct smb_connobj *cp, int level, char *objname,
   67         struct proc *p);
   68 static void smb_co_done(struct smb_connobj *cp);
   69 static int  smb_co_lockstatus(struct smb_connobj *cp, struct proc *p);
   70 
   71 static int  smb_vc_disconnect(struct smb_vc *vcp);
   72 static void smb_vc_free(struct smb_connobj *cp);
   73 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred);
   74 static smb_co_free_t smb_share_free;
   75 static smb_co_gone_t smb_share_gone;
   76 
   77 static int  smb_sysctl_treedump(SYSCTL_HANDLER_ARGS);
   78 
   79 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE,
   80             NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree");
   81 
   82 int
   83 smb_sm_init(void)
   84 {
   85 
   86         smb_co_init(&smb_vclist, SMBL_SM, "smbsm", curproc);
   87         smb_co_unlock(&smb_vclist, 0, curproc);
   88         return 0;
   89 }
   90 
   91 int
   92 smb_sm_done(void)
   93 {
   94 
   95         /* XXX: hold the mutex */
   96         if (smb_vclist.co_usecount > 1) {
   97                 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1);
   98                 return EBUSY;
   99         }
  100         smb_co_done(&smb_vclist);
  101         return 0;
  102 }
  103 
  104 static int
  105 smb_sm_lockvclist(int flags, struct proc *p)
  106 {
  107 
  108         return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE, p);
  109 }
  110 
  111 static void
  112 smb_sm_unlockvclist(struct proc *p)
  113 {
  114 
  115         smb_co_unlock(&smb_vclist, LK_RELEASE, p);
  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 proc *p = scred->scr_p;
  123         struct smb_vc *vcp;
  124         int exact = 1;
  125         int error;
  126 
  127         vcspec->shspec = shspec;
  128         error = ENOENT;
  129         SMBCO_FOREACH((struct smb_connobj*)vcp, &smb_vclist) {
  130                 error = smb_vc_lock(vcp, LK_EXCLUSIVE, p);
  131                 if (error)
  132                         continue;
  133 
  134                 if ((vcp->obj.co_flags & SMBV_PRIVATE) ||
  135                     !CONNADDREQ(vcp->vc_paddr, vcspec->sap) ||
  136                     strcmp(vcp->vc_username, vcspec->username) != 0)
  137                         goto err1;
  138                 if (vcspec->owner != SMBM_ANY_OWNER) {
  139                         if (vcp->vc_uid != vcspec->owner)
  140                                 goto err1;
  141                 } else
  142                         exact = 0;
  143                 if (vcspec->group != SMBM_ANY_GROUP) {
  144                         if (vcp->vc_grp != vcspec->group)
  145                                 goto err1;
  146                 } else
  147                         exact = 0;
  148                 if (vcspec->mode & SMBM_EXACT) {
  149                         if (!exact || (vcspec->mode & SMBM_MASK) !=
  150                             vcp->vc_mode)
  151                                 goto err1;
  152                 }
  153                 if (smb_vc_access(vcp, scred, vcspec->mode) != 0)
  154                         goto err1;
  155                 vcspec->ssp = NULL;
  156                 if (shspec) {
  157                         error = (int)smb_vc_lookupshare(vcp, shspec, scred,
  158                             &vcspec->ssp);
  159                         if (error)
  160                                 goto fail;
  161                 }
  162                 error = 0;
  163                 break;
  164         err1:
  165                 error = 1;
  166         fail:
  167                 smb_vc_unlock(vcp, 0, p);
  168         }
  169         if (vcp) {
  170                 smb_vc_ref(vcp, p);
  171                 *vcpp = vcp;
  172         }
  173         return (error);
  174 }
  175 
  176 int
  177 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec,
  178         struct smb_cred *scred, struct smb_vc **vcpp)
  179 {
  180         struct proc *p = scred->scr_p;
  181         struct smb_vc *vcp;
  182         struct smb_share *ssp = NULL;
  183         int error;
  184 
  185         *vcpp = vcp = NULL;
  186 
  187         error = smb_sm_lockvclist(LK_EXCLUSIVE, p);
  188         if (error)
  189                 return error;
  190         error = smb_sm_lookupint(vcspec, shspec, scred, vcpp);
  191         if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) {
  192                 smb_sm_unlockvclist(p);
  193                 return error;
  194         }
  195         error = smb_sm_lookupint(vcspec, NULL, scred, &vcp);
  196         if (error) {
  197                 error = smb_vc_create(vcspec, scred, &vcp);
  198                 if (error)
  199                         goto out;
  200                 error = smb_vc_connect(vcp, scred);
  201                 if (error)
  202                         goto out;
  203         }
  204         if (shspec == NULL)
  205                 goto out;
  206         error = smb_share_create(vcp, shspec, scred, &ssp);
  207         if (error)
  208                 goto out;
  209         error = smb_smb_treeconnect(ssp, scred);
  210         if (error == 0)
  211                 vcspec->ssp = ssp;
  212         else
  213                 smb_share_put(ssp, scred);
  214 out:
  215         smb_sm_unlockvclist(p);
  216         if (error == 0)
  217                 *vcpp = vcp;
  218         else if (vcp)
  219                 smb_vc_put(vcp, scred);
  220         return error;
  221 }
  222 
  223 /*
  224  * Common code for connection object
  225  */
  226 static void
  227 smb_co_init(struct smb_connobj *cp, int level, char *objname, struct proc *p)
  228 {
  229         SLIST_INIT(&cp->co_children);
  230         smb_sl_init(&cp->co_interlock, objname);
  231         lockinit(&cp->co_lock, PZERO, objname, 0, 0);
  232         cp->co_level = level;
  233         cp->co_usecount = 1;
  234         KASSERT(smb_co_lock(cp, LK_EXCLUSIVE, p) == 0, ("smb_co_init: lock failed"));
  235 }
  236 
  237 static void
  238 smb_co_done(struct smb_connobj *cp)
  239 {
  240         smb_sl_destroy(&cp->co_interlock);
  241         lockdestroy(&cp->co_lock);
  242 }
  243 
  244 static void
  245 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred)
  246 {
  247         struct smb_connobj *parent;
  248 
  249         if (cp->co_gone)
  250                 cp->co_gone(cp, scred);
  251         parent = cp->co_parent;
  252         if (parent) {
  253                 smb_co_lock(parent, LK_EXCLUSIVE, scred->scr_p);
  254                 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next);
  255                 smb_co_put(parent, scred);
  256         }
  257         if (cp->co_free)
  258                 cp->co_free(cp);
  259 }
  260 
  261 void
  262 smb_co_ref(struct smb_connobj *cp, struct proc *p)
  263 {
  264 
  265         SMB_CO_LOCK(cp);
  266         cp->co_usecount++;
  267         SMB_CO_UNLOCK(cp);
  268 }
  269 
  270 void
  271 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred)
  272 {
  273         struct proc *p = scred->scr_p;
  274 
  275         SMB_CO_LOCK(cp);
  276         if (cp->co_usecount > 1) {
  277                 cp->co_usecount--;
  278                 SMB_CO_UNLOCK(cp);
  279                 return;
  280         }
  281         if (cp->co_usecount == 0) {
  282                 SMBERROR("negative use_count for object %d", cp->co_level);
  283                 SMB_CO_UNLOCK(cp);
  284                 return;
  285         }
  286         cp->co_usecount--;
  287         cp->co_flags |= SMBO_GONE;
  288 
  289         lockmgr(&cp->co_lock, LK_DRAIN | LK_INTERLOCK, &cp->co_interlock, p);
  290         smb_co_gone(cp, scred);
  291 }
  292 
  293 int
  294 smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred)
  295 {
  296         int error;
  297 
  298         if ((flags & LK_INTERLOCK) == 0)
  299                 SMB_CO_LOCK(cp);
  300         cp->co_usecount++;
  301         error = smb_co_lock(cp, flags | LK_INTERLOCK, scred->scr_p);
  302         if (error) {
  303                 SMB_CO_LOCK(cp);
  304                 cp->co_usecount--;
  305                 SMB_CO_UNLOCK(cp);
  306                 return error;
  307         }
  308         return 0;
  309 }
  310 
  311 void
  312 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred)
  313 {
  314         struct proc *p = scred->scr_p;
  315         int flags;
  316 
  317         flags = LK_RELEASE;
  318         SMB_CO_LOCK(cp);
  319         if (cp->co_usecount > 1) {
  320                 cp->co_usecount--;
  321         } else if (cp->co_usecount == 1) {
  322                 cp->co_usecount--;
  323                 cp->co_flags |= SMBO_GONE;
  324                 flags = LK_DRAIN;
  325         } else {
  326                 SMBERROR("negative usecount");
  327         }
  328         lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock, p);
  329         if ((cp->co_flags & SMBO_GONE) == 0)
  330                 return;
  331         lockmgr(&cp->co_lock, LK_DRAIN, NULL, p);
  332         smb_co_gone(cp, scred);
  333 }
  334 
  335 int
  336 smb_co_lockstatus(struct smb_connobj *cp, struct proc *p)
  337 {
  338         return lockstatus(&cp->co_lock, p);
  339 }
  340 
  341 int
  342 smb_co_lock(struct smb_connobj *cp, int flags, struct proc *p)
  343 {
  344 
  345         if (cp->co_flags & SMBO_GONE)
  346                 return EINVAL;
  347         if ((flags & LK_TYPE_MASK) == 0)
  348                 flags |= LK_EXCLUSIVE;
  349         if (smb_co_lockstatus(cp, p) == LK_EXCLUSIVE && 
  350             (flags & LK_CANRECURSE) == 0) {
  351                 SMBERROR("recursive lock for object %d\n", cp->co_level);
  352                 return 0;
  353         }
  354         return lockmgr(&cp->co_lock, flags, &cp->co_interlock, p);
  355 }
  356 
  357 void
  358 smb_co_unlock(struct smb_connobj *cp, int flags, struct proc *p)
  359 {
  360         (void)lockmgr(&cp->co_lock, flags | LK_RELEASE, &cp->co_interlock, p);
  361 }
  362 
  363 static void
  364 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child)
  365 {
  366         KASSERT(smb_co_lockstatus(parent, curproc) == LK_EXCLUSIVE, ("smb_co_addchild: parent not locked"));
  367         KASSERT(smb_co_lockstatus(child, curproc) == LK_EXCLUSIVE, ("smb_co_addchild: child not locked"));
  368 
  369         smb_co_ref(parent, curproc);
  370         SLIST_INSERT_HEAD(&parent->co_children, child, co_next);
  371         child->co_parent = parent;
  372 }
  373 
  374 /*
  375  * Session implementation
  376  */
  377 
  378 int
  379 smb_vc_create(struct smb_vcspec *vcspec,
  380         struct smb_cred *scred, struct smb_vc **vcpp)
  381 {
  382         struct smb_vc *vcp;
  383         struct proc *p = scred->scr_p;
  384         struct ucred *cred = scred->scr_cred;
  385         uid_t uid = vcspec->owner;
  386         gid_t gid = vcspec->group;
  387         uid_t realuid = cred->cr_uid;
  388         char *domain = vcspec->domain;
  389         int error, isroot;
  390 
  391         isroot = smb_suser(cred) == 0;
  392         /*
  393          * Only superuser can create VCs with different uid and gid
  394          */
  395         if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
  396                 return EPERM;
  397         if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
  398                 return EPERM;
  399 
  400         vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK);
  401         smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc", p);
  402         vcp->obj.co_free = smb_vc_free;
  403         vcp->obj.co_gone = smb_vc_gone;
  404         vcp->vc_number = smb_vcnext++;
  405         vcp->vc_timo = SMB_DEFRQTIMO;
  406         vcp->vc_smbuid = SMB_UID_UNKNOWN;
  407         vcp->vc_mode = vcspec->rights & SMBM_MASK;
  408         vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE);
  409         vcp->vc_tdesc = &smb_tran_nbtcp_desc;
  410         vcp->vc_seqno = 0;
  411         vcp->vc_mackey = NULL;
  412         vcp->vc_mackeylen = 0;
  413 
  414         if (uid == SMBM_ANY_OWNER)
  415                 uid = realuid;
  416         if (gid == SMBM_ANY_GROUP)
  417                 gid = cred->cr_groups[0];
  418         vcp->vc_uid = uid;
  419         vcp->vc_grp = gid;
  420 
  421         smb_sl_init(&vcp->vc_stlock, "vcstlock");
  422         error = ENOMEM;
  423 
  424         vcp->vc_paddr = dup_sockaddr(vcspec->sap, 1);
  425         if (vcp->vc_paddr == NULL)
  426                 goto fail;
  427         vcp->vc_laddr = dup_sockaddr(vcspec->lap, 1);
  428         if (vcp->vc_laddr == NULL)
  429                 goto fail;
  430         vcp->vc_pass = smb_strdup(vcspec->pass);
  431         if (vcp->vc_pass == NULL)
  432                 goto fail;
  433         vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain :
  434             "NODOMAIN");
  435         if (vcp->vc_domain == NULL)
  436                 goto fail;
  437         vcp->vc_srvname = smb_strdup(vcspec->srvname);
  438         if (vcp->vc_srvname == NULL)
  439                 goto fail;
  440         vcp->vc_username = smb_strdup(vcspec->username);
  441         if (vcp->vc_username == NULL)
  442                 goto fail;
  443         error = (int)iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower);
  444         if (error)
  445                 goto fail;
  446         error = (int)iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper);
  447         if (error)
  448                 goto fail;
  449         if (vcspec->servercs[0]) {
  450                 error = (int)iconv_open(vcspec->servercs, vcspec->localcs,
  451                     &vcp->vc_toserver);
  452                 if (error)
  453                         goto fail;
  454                 error = (int)iconv_open(vcspec->localcs, vcspec->servercs,
  455                     &vcp->vc_tolocal);
  456                 if (error)
  457                         goto fail;
  458         }
  459         error = (int)smb_iod_create(vcp);
  460         if (error)
  461                 goto fail;
  462         *vcpp = vcp;
  463         smb_co_addchild(&smb_vclist, VCTOCP(vcp));
  464         return (0);
  465 
  466  fail:
  467         smb_vc_put(vcp, scred);
  468         return (error);
  469 }
  470 
  471 static void
  472 smb_vc_free(struct smb_connobj *cp)
  473 {
  474         struct smb_vc *vcp = CPTOVC(cp);
  475 
  476         if (vcp->vc_iod)
  477                 smb_iod_destroy(vcp->vc_iod);
  478         SMB_STRFREE(vcp->vc_username);
  479         SMB_STRFREE(vcp->vc_srvname);
  480         SMB_STRFREE(vcp->vc_pass);
  481         SMB_STRFREE(vcp->vc_domain);
  482         if (vcp->vc_mackey)
  483                 free(vcp->vc_mackey, M_SMBTEMP);
  484         if (vcp->vc_paddr)
  485                 free(vcp->vc_paddr, M_SONAME);
  486         if (vcp->vc_laddr)
  487                 free(vcp->vc_laddr, M_SONAME);
  488         if (vcp->vc_tolower)
  489                 iconv_close(vcp->vc_tolower);
  490         if (vcp->vc_toupper)
  491                 iconv_close(vcp->vc_toupper);
  492         if (vcp->vc_tolocal)
  493                 iconv_close(vcp->vc_tolocal);
  494         if (vcp->vc_toserver)
  495                 iconv_close(vcp->vc_toserver);
  496         smb_co_done(VCTOCP(vcp));
  497         smb_sl_destroy(&vcp->vc_stlock);
  498         free(vcp, M_SMBCONN);
  499 }
  500 
  501 /*
  502  * Called when use count of VC dropped to zero.
  503  * VC should be locked on enter with LK_DRAIN.
  504  */
  505 static void
  506 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred)
  507 {
  508         struct smb_vc *vcp = CPTOVC(cp);
  509 
  510         smb_vc_disconnect(vcp);
  511 }
  512 
  513 void
  514 smb_vc_ref(struct smb_vc *vcp, struct proc *p)
  515 {
  516         smb_co_ref(VCTOCP(vcp), p);
  517 }
  518 
  519 void
  520 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred)
  521 {
  522         smb_co_rele(VCTOCP(vcp), scred);
  523 }
  524 
  525 int
  526 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred)
  527 {
  528         return smb_co_get(VCTOCP(vcp), flags, scred);
  529 }
  530 
  531 void
  532 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred)
  533 {
  534         smb_co_put(VCTOCP(vcp), scred);
  535 }
  536 
  537 int
  538 smb_vc_lock(struct smb_vc *vcp, int flags, struct proc *p)
  539 {
  540         return smb_co_lock(VCTOCP(vcp), flags, p);
  541 }
  542 
  543 void
  544 smb_vc_unlock(struct smb_vc *vcp, int flags, struct proc *p)
  545 {
  546         smb_co_unlock(VCTOCP(vcp), flags, p);
  547 }
  548 
  549 int
  550 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode)
  551 {
  552         struct ucred *cred = scred->scr_cred;
  553 
  554         if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid)
  555                 return 0;
  556         mode >>= 3;
  557         if (!groupmember(vcp->vc_grp, cred))
  558                 mode >>= 3;
  559         return (vcp->vc_mode & mode) == mode ? 0 : EACCES;
  560 }
  561 
  562 static int
  563 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp)
  564 {
  565         int exact = 1;
  566 
  567         if (strcmp(ssp->ss_name, dp->name) != 0)
  568                 return 1;
  569         if (dp->owner != SMBM_ANY_OWNER) {
  570                 if (ssp->ss_uid != dp->owner)
  571                         return 1;
  572         } else
  573                 exact = 0;
  574         if (dp->group != SMBM_ANY_GROUP) {
  575                 if (ssp->ss_grp != dp->group)
  576                         return 1;
  577         } else
  578                 exact = 0;
  579 
  580         if (dp->mode & SMBM_EXACT) {
  581                 if (!exact)
  582                         return 1;
  583                 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1;
  584         }
  585         if (smb_share_access(ssp, dp->scred, dp->mode) != 0)
  586                 return 1;
  587         return 0;
  588 }
  589 
  590 /*
  591  * Lookup share in the given VC. Share referenced and locked on return.
  592  * VC expected to be locked on entry and will be left locked on exit.
  593  */
  594 int
  595 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp,
  596         struct smb_cred *scred, struct smb_share **sspp)
  597 {
  598         struct proc *p = scred->scr_p;
  599         struct smb_share *ssp = NULL;
  600         int error;
  601 
  602         *sspp = NULL;
  603         dp->scred = scred;
  604         SMBCO_FOREACH((struct smb_connobj*)ssp, VCTOCP(vcp)) {
  605                 error = smb_share_lock(ssp, LK_EXCLUSIVE, p);
  606                 if (error)
  607                         continue;
  608                 if (smb_vc_cmpshare(ssp, dp) == 0)
  609                         break;
  610                 smb_share_unlock(ssp, 0, p);
  611         }
  612         if (ssp) {
  613                 smb_share_ref(ssp, p);
  614                 *sspp = ssp;
  615                 error = 0;
  616         } else
  617                 error = ENOENT;
  618         return error;
  619 }
  620 
  621 int
  622 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred)
  623 {
  624 
  625         return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL);
  626 }
  627 
  628 /*
  629  * Destroy VC to server, invalidate shares linked with it.
  630  * Transport should be locked on entry.
  631  */
  632 int
  633 smb_vc_disconnect(struct smb_vc *vcp)
  634 {
  635 
  636         smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL);
  637         return 0;
  638 }
  639 
  640 static char smb_emptypass[] = "";
  641 
  642 const char *
  643 smb_vc_getpass(struct smb_vc *vcp)
  644 {
  645         if (vcp->vc_pass)
  646                 return vcp->vc_pass;
  647         return smb_emptypass;
  648 }
  649 
  650 static int
  651 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip)
  652 {
  653         bzero(vip, sizeof(struct smb_vc_info));
  654         vip->itype = SMB_INFO_VC;
  655         vip->usecount = vcp->obj.co_usecount;
  656         vip->uid = vcp->vc_uid;
  657         vip->gid = vcp->vc_grp;
  658         vip->mode = vcp->vc_mode;
  659         vip->flags = vcp->obj.co_flags;
  660         vip->sopt = vcp->vc_sopt;
  661         vip->iodstate = vcp->vc_iod->iod_state;
  662         bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey));
  663         snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname);
  664         snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username);
  665         return 0;
  666 }
  667 
  668 u_short
  669 smb_vc_nextmid(struct smb_vc *vcp)
  670 {
  671         u_short r;
  672 
  673         SMB_CO_LOCK(&vcp->obj);
  674         r = vcp->vc_mid++;
  675         SMB_CO_UNLOCK(&vcp->obj);
  676         return r;
  677 }
  678 
  679 /*
  680  * Share implementation
  681  */
  682 /*
  683  * Allocate share structure and attach it to the given VC
  684  * Connection expected to be locked on entry. Share will be returned
  685  * in locked state.
  686  */
  687 int
  688 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec,
  689         struct smb_cred *scred, struct smb_share **sspp)
  690 {
  691         struct smb_share *ssp;
  692         struct proc *p = scred->scr_p;
  693         struct ucred *cred = scred->scr_cred;
  694         uid_t realuid = cred->cr_uid;
  695         uid_t uid = shspec->owner;
  696         gid_t gid = shspec->group;
  697         int error, isroot;
  698 
  699         isroot = smb_suser(cred) == 0;
  700         /*
  701          * Only superuser can create shares with different uid and gid
  702          */
  703         if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot)
  704                 return EPERM;
  705         if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot)
  706                 return EPERM;
  707         error = smb_vc_lookupshare(vcp, shspec, scred, &ssp);
  708         if (!error) {
  709                 smb_share_put(ssp, scred);
  710                 return EEXIST;
  711         }
  712         if (uid == SMBM_ANY_OWNER)
  713                 uid = realuid;
  714         if (gid == SMBM_ANY_GROUP)
  715                 gid = cred->cr_groups[0];
  716         ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK);
  717         smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss", p);
  718         ssp->obj.co_free = smb_share_free;
  719         ssp->obj.co_gone = smb_share_gone;
  720         smb_sl_init(&ssp->ss_stlock, "ssstlock");
  721         ssp->ss_name = smb_strdup(shspec->name);
  722         if (shspec->pass && shspec->pass[0])
  723                 ssp->ss_pass = smb_strdup(shspec->pass);
  724         ssp->ss_type = shspec->stype;
  725         ssp->ss_tid = SMB_TID_UNKNOWN;
  726         ssp->ss_uid = uid;
  727         ssp->ss_grp = gid;
  728         ssp->ss_mode = shspec->rights & SMBM_MASK;
  729         smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp));
  730         *sspp = ssp;
  731         return 0;
  732 }
  733 
  734 static void
  735 smb_share_free(struct smb_connobj *cp)
  736 {
  737         struct smb_share *ssp = CPTOSS(cp);
  738 
  739         SMB_STRFREE(ssp->ss_name);
  740         SMB_STRFREE(ssp->ss_pass);
  741         smb_sl_destroy(&ssp->ss_stlock);
  742         smb_co_done(SSTOCP(ssp));
  743         free(ssp, M_SMBCONN);
  744 }
  745 
  746 static void
  747 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred)
  748 {
  749         struct smb_share *ssp = CPTOSS(cp);
  750 
  751         smb_smb_treedisconnect(ssp, scred);
  752 }
  753 
  754 void
  755 smb_share_ref(struct smb_share *ssp, struct proc *p)
  756 {
  757         smb_co_ref(SSTOCP(ssp), p);
  758 }
  759 
  760 void
  761 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred)
  762 {
  763         smb_co_rele(SSTOCP(ssp), scred);
  764 }
  765 
  766 int
  767 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred)
  768 {
  769         return smb_co_get(SSTOCP(ssp), flags, scred);
  770 }
  771 
  772 void
  773 smb_share_put(struct smb_share *ssp, struct smb_cred *scred)
  774 {
  775         smb_co_put(SSTOCP(ssp), scred);
  776 }
  777 
  778 int
  779 smb_share_lock(struct smb_share *ssp, int flags, struct proc *p)
  780 {
  781         return smb_co_lock(SSTOCP(ssp), flags, p);
  782 }
  783 
  784 void
  785 smb_share_unlock(struct smb_share *ssp, int flags, struct proc *p)
  786 {
  787         smb_co_unlock(SSTOCP(ssp), flags, p);
  788 }
  789 
  790 int
  791 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode)
  792 {
  793         struct ucred *cred = scred->scr_cred;
  794 
  795         if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid)
  796                 return 0;
  797         mode >>= 3;
  798         if (!groupmember(ssp->ss_grp, cred))
  799                 mode >>= 3;
  800         return (ssp->ss_mode & mode) == mode ? 0 : EACCES;
  801 }
  802 
  803 void
  804 smb_share_invalidate(struct smb_share *ssp)
  805 {
  806         ssp->ss_tid = SMB_TID_UNKNOWN;
  807 }
  808 
  809 int
  810 smb_share_valid(struct smb_share *ssp)
  811 {
  812         return ssp->ss_tid != SMB_TID_UNKNOWN &&
  813             ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid;
  814 }
  815 
  816 const char*
  817 smb_share_getpass(struct smb_share *ssp)
  818 {
  819         struct smb_vc *vcp;
  820 
  821         if (ssp->ss_pass)
  822                 return ssp->ss_pass;
  823         vcp = SSTOVC(ssp);
  824         if (vcp->vc_pass)
  825                 return vcp->vc_pass;
  826         return smb_emptypass;
  827 }
  828 
  829 static int
  830 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip)
  831 {
  832         bzero(sip, sizeof(struct smb_share_info));
  833         sip->itype = SMB_INFO_SHARE;
  834         sip->usecount = ssp->obj.co_usecount;
  835         sip->tid  = ssp->ss_tid;
  836         sip->type= ssp->ss_type;
  837         sip->uid = ssp->ss_uid;
  838         sip->gid = ssp->ss_grp;
  839         sip->mode= ssp->ss_mode;
  840         sip->flags = ssp->obj.co_flags;
  841         snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name);
  842         return 0;
  843 }
  844 
  845 /*
  846  * Dump an entire tree into sysctl call
  847  */
  848 static int
  849 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS)
  850 {
  851         struct proc *p = req->p;
  852         struct smb_cred scred;
  853         struct smb_vc *vcp;
  854         struct smb_share *ssp;
  855         struct smb_vc_info vci;
  856         struct smb_share_info ssi;
  857         int error, itype;
  858 
  859         smb_makescred(&scred, p, p->p_ucred);
  860         error = smb_sm_lockvclist(LK_SHARED, p);
  861         if (error)
  862                 return error;
  863         SMBCO_FOREACH((struct smb_connobj*)vcp, &smb_vclist) {
  864                 error = smb_vc_lock(vcp, LK_SHARED, p);
  865                 if (error)
  866                         continue;
  867                 smb_vc_getinfo(vcp, &vci);
  868                 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info));
  869                 if (error) {
  870                         smb_vc_unlock(vcp, 0, p);
  871                         break;
  872                 }
  873                 SMBCO_FOREACH((struct smb_connobj*)ssp, VCTOCP(vcp)) {
  874                         error = smb_share_lock(ssp, LK_SHARED, p);
  875                         if (error) {
  876                                 error = 0;
  877                                 continue;
  878                         }
  879                         smb_share_getinfo(ssp, &ssi);
  880                         smb_share_unlock(ssp, 0, p);
  881                         error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info));
  882                         if (error)
  883                                 break;
  884                 }
  885                 smb_vc_unlock(vcp, 0, p);
  886                 if (error)
  887                         break;
  888         }
  889         if (!error) {
  890                 itype = SMB_INFO_NONE;
  891                 error = SYSCTL_OUT(req, &itype, sizeof(itype));
  892         }
  893         smb_sm_unlockvclist(p);
  894         return error;
  895 }

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