smb_conn.c revision 160436
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: head/sys/netsmb/smb_conn.c 160436 2006-07-17 16:12:59Z jhb $"); 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 57static struct smb_connobj smb_vclist; 58static int smb_vcnext = 1; /* next unique id for VC */ 59 60SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol"); 61 62MALLOC_DEFINE(M_SMBCONN, "smb_conn", "SMB connection"); 63 64static void smb_co_init(struct smb_connobj *cp, int level, char *objname, 65 struct thread *td); 66static void smb_co_done(struct smb_connobj *cp); 67static int smb_co_lockstatus(struct smb_connobj *cp, struct thread *td); 68 69static int smb_vc_disconnect(struct smb_vc *vcp); 70static void smb_vc_free(struct smb_connobj *cp); 71static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred); 72static smb_co_free_t smb_share_free; 73static smb_co_gone_t smb_share_gone; 74 75static int smb_sysctl_treedump(SYSCTL_HANDLER_ARGS); 76 77SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE, 78 NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree"); 79 80int 81smb_sm_init(void) 82{ 83 84 smb_co_init(&smb_vclist, SMBL_SM, "smbsm", curthread); 85 smb_co_unlock(&smb_vclist, 0, curthread); 86 return 0; 87} 88 89int 90smb_sm_done(void) 91{ 92 93 /* XXX: hold the mutex */ 94 if (smb_vclist.co_usecount > 1) { 95 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1); 96 return EBUSY; 97 } 98 lockmgr(&smb_vclist.co_lock, LK_DRAIN, 0, curthread); 99 smb_co_done(&smb_vclist); 100 return 0; 101} 102 103static int 104smb_sm_lockvclist(int flags, struct thread *td) 105{ 106 107 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE, td); 108} 109 110static void 111smb_sm_unlockvclist(struct thread *td) 112{ 113 114 smb_co_unlock(&smb_vclist, LK_RELEASE, td); 115} 116 117static int 118smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 119 struct smb_cred *scred, struct smb_vc **vcpp) 120{ 121 struct thread *td = scred->scr_td; 122 struct smb_connobj *scp; 123 struct smb_vc *vcp; 124 int exact = 1; 125 int error; 126 127 vcspec->shspec = shspec; 128 error = ENOENT; 129 vcp = NULL; 130 SMBCO_FOREACH(scp, &smb_vclist) { 131 vcp = (struct smb_vc *)scp; 132 error = smb_vc_lock(vcp, LK_EXCLUSIVE, td); 133 if (error) 134 continue; 135 136 if ((vcp->obj.co_flags & SMBV_PRIVATE) || 137 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) || 138 strcmp(vcp->vc_username, vcspec->username) != 0) 139 goto err1; 140 if (vcspec->owner != SMBM_ANY_OWNER) { 141 if (vcp->vc_uid != vcspec->owner) 142 goto err1; 143 } else 144 exact = 0; 145 if (vcspec->group != SMBM_ANY_GROUP) { 146 if (vcp->vc_grp != vcspec->group) 147 goto err1; 148 } else 149 exact = 0; 150 if (vcspec->mode & SMBM_EXACT) { 151 if (!exact || (vcspec->mode & SMBM_MASK) != 152 vcp->vc_mode) 153 goto err1; 154 } 155 if (smb_vc_access(vcp, scred, vcspec->mode) != 0) 156 goto err1; 157 vcspec->ssp = NULL; 158 if (shspec) { 159 error = (int)smb_vc_lookupshare(vcp, shspec, scred, 160 &vcspec->ssp); 161 if (error) 162 goto fail; 163 } 164 error = 0; 165 break; 166 err1: 167 error = 1; 168 fail: 169 smb_vc_unlock(vcp, 0, td); 170 } 171 if (vcp) { 172 smb_vc_ref(vcp); 173 *vcpp = vcp; 174 } 175 return (error); 176} 177 178int 179smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 180 struct smb_cred *scred, struct smb_vc **vcpp) 181{ 182 struct thread *td = scred->scr_td; 183 struct smb_vc *vcp; 184 struct smb_share *ssp = NULL; 185 int error; 186 187 *vcpp = vcp = NULL; 188 189 error = smb_sm_lockvclist(LK_EXCLUSIVE, td); 190 if (error) 191 return error; 192 error = smb_sm_lookupint(vcspec, shspec, scred, vcpp); 193 if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) { 194 smb_sm_unlockvclist(td); 195 return error; 196 } 197 error = smb_sm_lookupint(vcspec, NULL, scred, &vcp); 198 if (error) { 199 error = smb_vc_create(vcspec, scred, &vcp); 200 if (error) 201 goto out; 202 error = smb_vc_connect(vcp, scred); 203 if (error) 204 goto out; 205 } 206 if (shspec == NULL) 207 goto out; 208 error = smb_share_create(vcp, shspec, scred, &ssp); 209 if (error) 210 goto out; 211 error = smb_smb_treeconnect(ssp, scred); 212 if (error == 0) 213 vcspec->ssp = ssp; 214 else 215 smb_share_put(ssp, scred); 216out: 217 smb_sm_unlockvclist(td); 218 if (error == 0) 219 *vcpp = vcp; 220 else if (vcp) 221 smb_vc_put(vcp, scred); 222 return error; 223} 224 225/* 226 * Common code for connection object 227 */ 228static void 229smb_co_init(struct smb_connobj *cp, int level, char *objname, struct thread *td) 230{ 231 SLIST_INIT(&cp->co_children); 232 smb_sl_init(&cp->co_interlock, objname); 233 lockinit(&cp->co_lock, PZERO, objname, 0, 0); 234 cp->co_level = level; 235 cp->co_usecount = 1; 236 if (smb_co_lock(cp, LK_EXCLUSIVE, td) != 0) 237 panic("smb_co_init: lock failed"); 238} 239 240static void 241smb_co_done(struct smb_connobj *cp) 242{ 243 smb_sl_destroy(&cp->co_interlock); 244 lockmgr(&cp->co_lock, LK_RELEASE, 0, curthread); 245 lockdestroy(&cp->co_lock); 246} 247 248static void 249smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred) 250{ 251 struct smb_connobj *parent; 252 253 if (cp->co_gone) 254 cp->co_gone(cp, scred); 255 parent = cp->co_parent; 256 if (parent) { 257 smb_co_lock(parent, LK_EXCLUSIVE, scred->scr_td); 258 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next); 259 smb_co_put(parent, scred); 260 } 261 if (cp->co_free) 262 cp->co_free(cp); 263} 264 265void 266smb_co_ref(struct smb_connobj *cp) 267{ 268 269 SMB_CO_LOCK(cp); 270 cp->co_usecount++; 271 SMB_CO_UNLOCK(cp); 272} 273 274void 275smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred) 276{ 277 struct thread *td = scred->scr_td; 278 279 SMB_CO_LOCK(cp); 280 if (cp->co_usecount > 1) { 281 cp->co_usecount--; 282 SMB_CO_UNLOCK(cp); 283 return; 284 } 285 if (cp->co_usecount == 0) { 286 SMBERROR("negative use_count for object %d", cp->co_level); 287 SMB_CO_UNLOCK(cp); 288 return; 289 } 290 cp->co_usecount--; 291 cp->co_flags |= SMBO_GONE; 292 293 lockmgr(&cp->co_lock, LK_DRAIN | LK_INTERLOCK, &cp->co_interlock, td); 294 smb_co_gone(cp, scred); 295} 296 297int 298smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred) 299{ 300 int error; 301 302 if ((flags & LK_INTERLOCK) == 0) 303 SMB_CO_LOCK(cp); 304 cp->co_usecount++; 305 error = smb_co_lock(cp, flags | LK_INTERLOCK, scred->scr_td); 306 if (error) { 307 SMB_CO_LOCK(cp); 308 cp->co_usecount--; 309 SMB_CO_UNLOCK(cp); 310 return error; 311 } 312 return 0; 313} 314 315void 316smb_co_put(struct smb_connobj *cp, struct smb_cred *scred) 317{ 318 struct thread *td = scred->scr_td; 319 320 SMB_CO_LOCK(cp); 321 if (cp->co_usecount > 1) { 322 cp->co_usecount--; 323 } else if (cp->co_usecount == 1) { 324 cp->co_usecount--; 325 cp->co_flags |= SMBO_GONE; 326 } else { 327 SMBERROR("negative usecount"); 328 } 329 lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock, td); 330 if ((cp->co_flags & SMBO_GONE) == 0) 331 return; 332 lockmgr(&cp->co_lock, LK_DRAIN, NULL, td); 333 smb_co_gone(cp, scred); 334} 335 336int 337smb_co_lockstatus(struct smb_connobj *cp, struct thread *td) 338{ 339 return lockstatus(&cp->co_lock, td); 340} 341 342int 343smb_co_lock(struct smb_connobj *cp, int flags, struct thread *td) 344{ 345 346 if (cp->co_flags & SMBO_GONE) 347 return EINVAL; 348 if ((flags & LK_TYPE_MASK) == 0) 349 flags |= LK_EXCLUSIVE; 350 if (smb_co_lockstatus(cp, td) == LK_EXCLUSIVE && 351 (flags & LK_CANRECURSE) == 0) { 352 SMBERROR("recursive lock for object %d\n", cp->co_level); 353 return 0; 354 } 355 return lockmgr(&cp->co_lock, flags, &cp->co_interlock, td); 356} 357 358void 359smb_co_unlock(struct smb_connobj *cp, int flags, struct thread *td) 360{ 361 (void)lockmgr(&cp->co_lock, flags | LK_RELEASE, &cp->co_interlock, td); 362} 363 364static void 365smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child) 366{ 367 KASSERT(smb_co_lockstatus(parent, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: parent not locked")); 368 KASSERT(smb_co_lockstatus(child, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: child not locked")); 369 370 smb_co_ref(parent); 371 SLIST_INSERT_HEAD(&parent->co_children, child, co_next); 372 child->co_parent = parent; 373} 374 375/* 376 * Session implementation 377 */ 378 379int 380smb_vc_create(struct smb_vcspec *vcspec, 381 struct smb_cred *scred, struct smb_vc **vcpp) 382{ 383 struct smb_vc *vcp; 384 struct thread *td = scred->scr_td; 385 struct ucred *cred = scred->scr_cred; 386 uid_t uid = vcspec->owner; 387 gid_t gid = vcspec->group; 388 uid_t realuid = cred->cr_uid; 389 char *domain = vcspec->domain; 390 int error, isroot; 391 392 isroot = smb_suser(cred) == 0; 393 /* 394 * Only superuser can create VCs with different uid and gid 395 */ 396 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 397 return EPERM; 398 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 399 return EPERM; 400 401 vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK); 402 smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc", td); 403 vcp->obj.co_free = smb_vc_free; 404 vcp->obj.co_gone = smb_vc_gone; 405 vcp->vc_number = smb_vcnext++; 406 vcp->vc_timo = SMB_DEFRQTIMO; 407 vcp->vc_smbuid = SMB_UID_UNKNOWN; 408 vcp->vc_mode = vcspec->rights & SMBM_MASK; 409 vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE); 410 vcp->vc_tdesc = &smb_tran_nbtcp_desc; 411 vcp->vc_seqno = 0; 412 vcp->vc_mackey = NULL; 413 vcp->vc_mackeylen = 0; 414 415 if (uid == SMBM_ANY_OWNER) 416 uid = realuid; 417 if (gid == SMBM_ANY_GROUP) 418 gid = cred->cr_groups[0]; 419 vcp->vc_uid = uid; 420 vcp->vc_grp = gid; 421 422 smb_sl_init(&vcp->vc_stlock, "vcstlock"); 423 error = ENOMEM; 424 425 vcp->vc_paddr = sodupsockaddr(vcspec->sap, M_WAITOK); 426 if (vcp->vc_paddr == NULL) 427 goto fail; 428 vcp->vc_laddr = sodupsockaddr(vcspec->lap, M_WAITOK); 429 if (vcp->vc_laddr == NULL) 430 goto fail; 431 vcp->vc_pass = smb_strdup(vcspec->pass); 432 if (vcp->vc_pass == NULL) 433 goto fail; 434 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain : 435 "NODOMAIN"); 436 if (vcp->vc_domain == NULL) 437 goto fail; 438 vcp->vc_srvname = smb_strdup(vcspec->srvname); 439 if (vcp->vc_srvname == NULL) 440 goto fail; 441 vcp->vc_username = smb_strdup(vcspec->username); 442 if (vcp->vc_username == NULL) 443 goto fail; 444 error = (int)iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower); 445 if (error) 446 goto fail; 447 error = (int)iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper); 448 if (error) 449 goto fail; 450 if (vcspec->servercs[0]) { 451 error = (int)iconv_open(vcspec->servercs, vcspec->localcs, 452 &vcp->vc_toserver); 453 if (error) 454 goto fail; 455 error = (int)iconv_open(vcspec->localcs, vcspec->servercs, 456 &vcp->vc_tolocal); 457 if (error) 458 goto fail; 459 } 460 error = (int)smb_iod_create(vcp); 461 if (error) 462 goto fail; 463 *vcpp = vcp; 464 smb_co_addchild(&smb_vclist, VCTOCP(vcp)); 465 return (0); 466 467 fail: 468 smb_vc_put(vcp, scred); 469 return (error); 470} 471 472static void 473smb_vc_free(struct smb_connobj *cp) 474{ 475 struct smb_vc *vcp = CPTOVC(cp); 476 477 if (vcp->vc_iod) 478 smb_iod_destroy(vcp->vc_iod); 479 SMB_STRFREE(vcp->vc_username); 480 SMB_STRFREE(vcp->vc_srvname); 481 SMB_STRFREE(vcp->vc_pass); 482 SMB_STRFREE(vcp->vc_domain); 483 if (vcp->vc_mackey) 484 free(vcp->vc_mackey, M_SMBTEMP); 485 if (vcp->vc_paddr) 486 free(vcp->vc_paddr, M_SONAME); 487 if (vcp->vc_laddr) 488 free(vcp->vc_laddr, M_SONAME); 489 if (vcp->vc_tolower) 490 iconv_close(vcp->vc_tolower); 491 if (vcp->vc_toupper) 492 iconv_close(vcp->vc_toupper); 493 if (vcp->vc_tolocal) 494 iconv_close(vcp->vc_tolocal); 495 if (vcp->vc_toserver) 496 iconv_close(vcp->vc_toserver); 497 smb_co_done(VCTOCP(vcp)); 498 smb_sl_destroy(&vcp->vc_stlock); 499 free(vcp, M_SMBCONN); 500} 501 502/* 503 * Called when use count of VC dropped to zero. 504 * VC should be locked on enter with LK_DRAIN. 505 */ 506static void 507smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred) 508{ 509 struct smb_vc *vcp = CPTOVC(cp); 510 511 smb_vc_disconnect(vcp); 512} 513 514void 515smb_vc_ref(struct smb_vc *vcp) 516{ 517 smb_co_ref(VCTOCP(vcp)); 518} 519 520void 521smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred) 522{ 523 smb_co_rele(VCTOCP(vcp), scred); 524} 525 526int 527smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred) 528{ 529 return smb_co_get(VCTOCP(vcp), flags, scred); 530} 531 532void 533smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred) 534{ 535 smb_co_put(VCTOCP(vcp), scred); 536} 537 538int 539smb_vc_lock(struct smb_vc *vcp, int flags, struct thread *td) 540{ 541 return smb_co_lock(VCTOCP(vcp), flags, td); 542} 543 544void 545smb_vc_unlock(struct smb_vc *vcp, int flags, struct thread *td) 546{ 547 smb_co_unlock(VCTOCP(vcp), flags, td); 548} 549 550int 551smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode) 552{ 553 struct ucred *cred = scred->scr_cred; 554 555 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid) 556 return 0; 557 mode >>= 3; 558 if (!groupmember(vcp->vc_grp, cred)) 559 mode >>= 3; 560 return (vcp->vc_mode & mode) == mode ? 0 : EACCES; 561} 562 563static int 564smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp) 565{ 566 int exact = 1; 567 568 if (strcmp(ssp->ss_name, dp->name) != 0) 569 return 1; 570 if (dp->owner != SMBM_ANY_OWNER) { 571 if (ssp->ss_uid != dp->owner) 572 return 1; 573 } else 574 exact = 0; 575 if (dp->group != SMBM_ANY_GROUP) { 576 if (ssp->ss_grp != dp->group) 577 return 1; 578 } else 579 exact = 0; 580 581 if (dp->mode & SMBM_EXACT) { 582 if (!exact) 583 return 1; 584 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1; 585 } 586 if (smb_share_access(ssp, dp->scred, dp->mode) != 0) 587 return 1; 588 return 0; 589} 590 591/* 592 * Lookup share in the given VC. Share referenced and locked on return. 593 * VC expected to be locked on entry and will be left locked on exit. 594 */ 595int 596smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp, 597 struct smb_cred *scred, struct smb_share **sspp) 598{ 599 struct thread *td = scred->scr_td; 600 struct smb_connobj *scp = NULL; 601 struct smb_share *ssp = NULL; 602 int error; 603 604 *sspp = NULL; 605 dp->scred = scred; 606 SMBCO_FOREACH(scp, VCTOCP(vcp)) { 607 ssp = (struct smb_share *)scp; 608 error = smb_share_lock(ssp, LK_EXCLUSIVE, td); 609 if (error) 610 continue; 611 if (smb_vc_cmpshare(ssp, dp) == 0) 612 break; 613 smb_share_unlock(ssp, 0, td); 614 } 615 if (ssp) { 616 smb_share_ref(ssp); 617 *sspp = ssp; 618 error = 0; 619 } else 620 error = ENOENT; 621 return error; 622} 623 624int 625smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 626{ 627 628 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 629} 630 631/* 632 * Destroy VC to server, invalidate shares linked with it. 633 * Transport should be locked on entry. 634 */ 635int 636smb_vc_disconnect(struct smb_vc *vcp) 637{ 638 639 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 640 return 0; 641} 642 643static char smb_emptypass[] = ""; 644 645const char * 646smb_vc_getpass(struct smb_vc *vcp) 647{ 648 if (vcp->vc_pass) 649 return vcp->vc_pass; 650 return smb_emptypass; 651} 652 653static int 654smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip) 655{ 656 bzero(vip, sizeof(struct smb_vc_info)); 657 vip->itype = SMB_INFO_VC; 658 vip->usecount = vcp->obj.co_usecount; 659 vip->uid = vcp->vc_uid; 660 vip->gid = vcp->vc_grp; 661 vip->mode = vcp->vc_mode; 662 vip->flags = vcp->obj.co_flags; 663 vip->sopt = vcp->vc_sopt; 664 vip->iodstate = vcp->vc_iod->iod_state; 665 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey)); 666 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname); 667 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username); 668 return 0; 669} 670 671u_short 672smb_vc_nextmid(struct smb_vc *vcp) 673{ 674 u_short r; 675 676 SMB_CO_LOCK(&vcp->obj); 677 r = vcp->vc_mid++; 678 SMB_CO_UNLOCK(&vcp->obj); 679 return r; 680} 681 682/* 683 * Share implementation 684 */ 685/* 686 * Allocate share structure and attach it to the given VC 687 * Connection expected to be locked on entry. Share will be returned 688 * in locked state. 689 */ 690int 691smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 692 struct smb_cred *scred, struct smb_share **sspp) 693{ 694 struct smb_share *ssp; 695 struct thread *td = scred->scr_td; 696 struct ucred *cred = scred->scr_cred; 697 uid_t realuid = cred->cr_uid; 698 uid_t uid = shspec->owner; 699 gid_t gid = shspec->group; 700 int error, isroot; 701 702 isroot = smb_suser(cred) == 0; 703 /* 704 * Only superuser can create shares with different uid and gid 705 */ 706 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 707 return EPERM; 708 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 709 return EPERM; 710 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp); 711 if (!error) { 712 smb_share_put(ssp, scred); 713 return EEXIST; 714 } 715 if (uid == SMBM_ANY_OWNER) 716 uid = realuid; 717 if (gid == SMBM_ANY_GROUP) 718 gid = cred->cr_groups[0]; 719 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK); 720 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss", td); 721 ssp->obj.co_free = smb_share_free; 722 ssp->obj.co_gone = smb_share_gone; 723 smb_sl_init(&ssp->ss_stlock, "ssstlock"); 724 ssp->ss_name = smb_strdup(shspec->name); 725 if (shspec->pass && shspec->pass[0]) 726 ssp->ss_pass = smb_strdup(shspec->pass); 727 ssp->ss_type = shspec->stype; 728 ssp->ss_tid = SMB_TID_UNKNOWN; 729 ssp->ss_uid = uid; 730 ssp->ss_grp = gid; 731 ssp->ss_mode = shspec->rights & SMBM_MASK; 732 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp)); 733 *sspp = ssp; 734 return 0; 735} 736 737static void 738smb_share_free(struct smb_connobj *cp) 739{ 740 struct smb_share *ssp = CPTOSS(cp); 741 742 SMB_STRFREE(ssp->ss_name); 743 SMB_STRFREE(ssp->ss_pass); 744 smb_sl_destroy(&ssp->ss_stlock); 745 smb_co_done(SSTOCP(ssp)); 746 free(ssp, M_SMBCONN); 747} 748 749static void 750smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred) 751{ 752 struct smb_share *ssp = CPTOSS(cp); 753 754 smb_smb_treedisconnect(ssp, scred); 755} 756 757void 758smb_share_ref(struct smb_share *ssp) 759{ 760 smb_co_ref(SSTOCP(ssp)); 761} 762 763void 764smb_share_rele(struct smb_share *ssp, struct smb_cred *scred) 765{ 766 smb_co_rele(SSTOCP(ssp), scred); 767} 768 769int 770smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred) 771{ 772 return smb_co_get(SSTOCP(ssp), flags, scred); 773} 774 775void 776smb_share_put(struct smb_share *ssp, struct smb_cred *scred) 777{ 778 smb_co_put(SSTOCP(ssp), scred); 779} 780 781int 782smb_share_lock(struct smb_share *ssp, int flags, struct thread *td) 783{ 784 return smb_co_lock(SSTOCP(ssp), flags, td); 785} 786 787void 788smb_share_unlock(struct smb_share *ssp, int flags, struct thread *td) 789{ 790 smb_co_unlock(SSTOCP(ssp), flags, td); 791} 792 793int 794smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode) 795{ 796 struct ucred *cred = scred->scr_cred; 797 798 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid) 799 return 0; 800 mode >>= 3; 801 if (!groupmember(ssp->ss_grp, cred)) 802 mode >>= 3; 803 return (ssp->ss_mode & mode) == mode ? 0 : EACCES; 804} 805 806void 807smb_share_invalidate(struct smb_share *ssp) 808{ 809 ssp->ss_tid = SMB_TID_UNKNOWN; 810} 811 812int 813smb_share_valid(struct smb_share *ssp) 814{ 815 return ssp->ss_tid != SMB_TID_UNKNOWN && 816 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid; 817} 818 819const char* 820smb_share_getpass(struct smb_share *ssp) 821{ 822 struct smb_vc *vcp; 823 824 if (ssp->ss_pass) 825 return ssp->ss_pass; 826 vcp = SSTOVC(ssp); 827 if (vcp->vc_pass) 828 return vcp->vc_pass; 829 return smb_emptypass; 830} 831 832static int 833smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip) 834{ 835 bzero(sip, sizeof(struct smb_share_info)); 836 sip->itype = SMB_INFO_SHARE; 837 sip->usecount = ssp->obj.co_usecount; 838 sip->tid = ssp->ss_tid; 839 sip->type= ssp->ss_type; 840 sip->uid = ssp->ss_uid; 841 sip->gid = ssp->ss_grp; 842 sip->mode= ssp->ss_mode; 843 sip->flags = ssp->obj.co_flags; 844 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name); 845 return 0; 846} 847 848/* 849 * Dump an entire tree into sysctl call 850 */ 851static int 852smb_sysctl_treedump(SYSCTL_HANDLER_ARGS) 853{ 854 struct thread *td = req->td; 855 struct smb_cred scred; 856 struct smb_connobj *scp1, *scp2; 857 struct smb_vc *vcp; 858 struct smb_share *ssp; 859 struct smb_vc_info vci; 860 struct smb_share_info ssi; 861 int error, itype; 862 863 smb_makescred(&scred, td, td->td_ucred); 864 error = sysctl_wire_old_buffer(req, 0); 865 if (error) 866 return (error); 867 error = smb_sm_lockvclist(LK_SHARED, td); 868 if (error) 869 return error; 870 SMBCO_FOREACH(scp1, &smb_vclist) { 871 vcp = (struct smb_vc *)scp1; 872 error = smb_vc_lock(vcp, LK_SHARED, td); 873 if (error) 874 continue; 875 smb_vc_getinfo(vcp, &vci); 876 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info)); 877 if (error) { 878 smb_vc_unlock(vcp, 0, td); 879 break; 880 } 881 SMBCO_FOREACH(scp2, VCTOCP(vcp)) { 882 ssp = (struct smb_share *)scp2; 883 error = smb_share_lock(ssp, LK_SHARED, td); 884 if (error) { 885 error = 0; 886 continue; 887 } 888 smb_share_getinfo(ssp, &ssi); 889 smb_share_unlock(ssp, 0, td); 890 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info)); 891 if (error) 892 break; 893 } 894 smb_vc_unlock(vcp, 0, td); 895 if (error) 896 break; 897 } 898 if (!error) { 899 itype = SMB_INFO_NONE; 900 error = SYSCTL_OUT(req, &itype, sizeof(itype)); 901 } 902 smb_sm_unlockvclist(td); 903 return error; 904} 905