smb_conn.c revision 184568
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 184568 2008-11-02 20:22:24Z rwatson $"); 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/kernel.h> 43#include <sys/malloc.h> 44#include <sys/priv.h> 45#include <sys/proc.h> 46#include <sys/lock.h> 47#include <sys/sysctl.h> 48#include <sys/socketvar.h> 49 50#include <sys/iconv.h> 51 52#include <netsmb/smb.h> 53#include <netsmb/smb_subr.h> 54#include <netsmb/smb_conn.h> 55#include <netsmb/smb_tran.h> 56#include <netsmb/smb_trantcp.h> 57 58static struct smb_connobj smb_vclist; 59static int smb_vcnext = 1; /* next unique id for VC */ 60 61SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol"); 62 63MALLOC_DEFINE(M_SMBCONN, "smb_conn", "SMB connection"); 64 65static void smb_co_init(struct smb_connobj *cp, int level, char *ilockname, 66 char *lockname, struct thread *td); 67static void smb_co_done(struct smb_connobj *cp); 68static int smb_co_lockstatus(struct smb_connobj *cp, struct thread *td); 69 70static int smb_vc_disconnect(struct smb_vc *vcp); 71static void smb_vc_free(struct smb_connobj *cp); 72static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred); 73static smb_co_free_t smb_share_free; 74static smb_co_gone_t smb_share_gone; 75 76static int smb_sysctl_treedump(SYSCTL_HANDLER_ARGS); 77 78SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE, 79 NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree"); 80 81int 82smb_sm_init(void) 83{ 84 85 smb_co_init(&smb_vclist, SMBL_SM, "smbsm ilock", "smbsm", curthread); 86 smb_co_unlock(&smb_vclist, 0, curthread); 87 return 0; 88} 89 90int 91smb_sm_done(void) 92{ 93 94 /* XXX: hold the mutex */ 95 if (smb_vclist.co_usecount > 1) { 96 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1); 97 return EBUSY; 98 } 99 lockmgr(&smb_vclist.co_lock, LK_DRAIN, 0); 100 smb_co_done(&smb_vclist); 101 return 0; 102} 103 104static int 105smb_sm_lockvclist(int flags, struct thread *td) 106{ 107 108 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE, td); 109} 110 111static void 112smb_sm_unlockvclist(struct thread *td) 113{ 114 115 smb_co_unlock(&smb_vclist, LK_RELEASE, td); 116} 117 118static int 119smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 120 struct smb_cred *scred, struct smb_vc **vcpp) 121{ 122 struct thread *td = scred->scr_td; 123 struct smb_connobj *scp; 124 struct smb_vc *vcp; 125 int exact = 1; 126 int error; 127 128 vcspec->shspec = shspec; 129 error = ENOENT; 130 vcp = NULL; 131 SMBCO_FOREACH(scp, &smb_vclist) { 132 vcp = (struct smb_vc *)scp; 133 error = smb_vc_lock(vcp, LK_EXCLUSIVE, td); 134 if (error) 135 continue; 136 137 if ((vcp->obj.co_flags & SMBV_PRIVATE) || 138 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) || 139 strcmp(vcp->vc_username, vcspec->username) != 0) 140 goto err1; 141 if (vcspec->owner != SMBM_ANY_OWNER) { 142 if (vcp->vc_uid != vcspec->owner) 143 goto err1; 144 } else 145 exact = 0; 146 if (vcspec->group != SMBM_ANY_GROUP) { 147 if (vcp->vc_grp != vcspec->group) 148 goto err1; 149 } else 150 exact = 0; 151 if (vcspec->mode & SMBM_EXACT) { 152 if (!exact || (vcspec->mode & SMBM_MASK) != 153 vcp->vc_mode) 154 goto err1; 155 } 156 if (smb_vc_access(vcp, scred, vcspec->mode) != 0) 157 goto err1; 158 vcspec->ssp = NULL; 159 if (shspec) { 160 error = (int)smb_vc_lookupshare(vcp, shspec, scred, 161 &vcspec->ssp); 162 if (error) 163 goto fail; 164 } 165 error = 0; 166 break; 167 err1: 168 error = 1; 169 fail: 170 smb_vc_unlock(vcp, 0, td); 171 } 172 if (vcp) { 173 smb_vc_ref(vcp); 174 *vcpp = vcp; 175 } 176 return (error); 177} 178 179int 180smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 181 struct smb_cred *scred, struct smb_vc **vcpp) 182{ 183 struct thread *td = scred->scr_td; 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(LK_EXCLUSIVE, td); 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(td); 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); 217out: 218 smb_sm_unlockvclist(td); 219 if (error == 0) 220 *vcpp = vcp; 221 else if (vcp) { 222 smb_vc_lock(vcp, LK_EXCLUSIVE, scred->scr_td); 223 smb_vc_put(vcp, scred); 224 } 225 return error; 226} 227 228/* 229 * Common code for connection object 230 */ 231static void 232smb_co_init(struct smb_connobj *cp, int level, char *ilockname, char *lockname, 233 struct thread *td) 234{ 235 SLIST_INIT(&cp->co_children); 236 smb_sl_init(&cp->co_interlock, ilockname); 237 lockinit(&cp->co_lock, PZERO, lockname, 0, 0); 238 cp->co_level = level; 239 cp->co_usecount = 1; 240 if (smb_co_lock(cp, LK_EXCLUSIVE, td) != 0) 241 panic("smb_co_init: lock failed"); 242} 243 244static void 245smb_co_done(struct smb_connobj *cp) 246{ 247 smb_sl_destroy(&cp->co_interlock); 248 lockmgr(&cp->co_lock, LK_RELEASE, 0); 249 lockdestroy(&cp->co_lock); 250} 251 252static void 253smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred) 254{ 255 struct smb_connobj *parent; 256 257 if (cp->co_gone) 258 cp->co_gone(cp, scred); 259 parent = cp->co_parent; 260 if (parent) { 261 smb_co_lock(parent, LK_EXCLUSIVE, scred->scr_td); 262 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next); 263 smb_co_put(parent, scred); 264 } 265 if (cp->co_free) 266 cp->co_free(cp); 267} 268 269void 270smb_co_ref(struct smb_connobj *cp) 271{ 272 273 SMB_CO_LOCK(cp); 274 cp->co_usecount++; 275 SMB_CO_UNLOCK(cp); 276} 277 278void 279smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred) 280{ 281 282 SMB_CO_LOCK(cp); 283 if (cp->co_usecount > 1) { 284 cp->co_usecount--; 285 SMB_CO_UNLOCK(cp); 286 return; 287 } 288 if (cp->co_usecount == 0) { 289 SMBERROR("negative use_count for object %d", cp->co_level); 290 SMB_CO_UNLOCK(cp); 291 return; 292 } 293 cp->co_usecount--; 294 cp->co_flags |= SMBO_GONE; 295 296 lockmgr(&cp->co_lock, LK_DRAIN | LK_INTERLOCK, &cp->co_interlock); 297 smb_co_gone(cp, scred); 298} 299 300int 301smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred) 302{ 303 int error; 304 305 if ((flags & LK_INTERLOCK) == 0) 306 SMB_CO_LOCK(cp); 307 cp->co_usecount++; 308 error = smb_co_lock(cp, flags | LK_INTERLOCK, scred->scr_td); 309 if (error) { 310 SMB_CO_LOCK(cp); 311 cp->co_usecount--; 312 SMB_CO_UNLOCK(cp); 313 return error; 314 } 315 return 0; 316} 317 318void 319smb_co_put(struct smb_connobj *cp, struct smb_cred *scred) 320{ 321 322 SMB_CO_LOCK(cp); 323 if (cp->co_usecount > 1) { 324 cp->co_usecount--; 325 } else if (cp->co_usecount == 1) { 326 cp->co_usecount--; 327 cp->co_flags |= SMBO_GONE; 328 } else { 329 SMBERROR("negative usecount"); 330 } 331 lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock); 332 if ((cp->co_flags & SMBO_GONE) == 0) 333 return; 334 lockmgr(&cp->co_lock, LK_DRAIN, NULL); 335 smb_co_gone(cp, scred); 336} 337 338int 339smb_co_lockstatus(struct smb_connobj *cp, struct thread *td) 340{ 341 return lockstatus(&cp->co_lock); 342} 343 344int 345smb_co_lock(struct smb_connobj *cp, int flags, struct thread *td) 346{ 347 348 if (cp->co_flags & SMBO_GONE) 349 return EINVAL; 350 if ((flags & LK_TYPE_MASK) == 0) 351 flags |= LK_EXCLUSIVE; 352 if (smb_co_lockstatus(cp, td) == LK_EXCLUSIVE && 353 (flags & LK_CANRECURSE) == 0) { 354 SMBERROR("recursive lock for object %d\n", cp->co_level); 355 return 0; 356 } 357 return lockmgr(&cp->co_lock, flags, &cp->co_interlock); 358} 359 360void 361smb_co_unlock(struct smb_connobj *cp, int flags, struct thread *td) 362{ 363 (void)lockmgr(&cp->co_lock, flags | LK_RELEASE, &cp->co_interlock); 364} 365 366static void 367smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child) 368{ 369 KASSERT(smb_co_lockstatus(parent, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: parent not locked")); 370 KASSERT(smb_co_lockstatus(child, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: child not locked")); 371 372 smb_co_ref(parent); 373 SLIST_INSERT_HEAD(&parent->co_children, child, co_next); 374 child->co_parent = parent; 375} 376 377/* 378 * Session implementation 379 */ 380 381int 382smb_vc_create(struct smb_vcspec *vcspec, 383 struct smb_cred *scred, struct smb_vc **vcpp) 384{ 385 struct smb_vc *vcp; 386 struct thread *td = scred->scr_td; 387 struct ucred *cred = scred->scr_cred; 388 uid_t uid = vcspec->owner; 389 gid_t gid = vcspec->group; 390 uid_t realuid = cred->cr_uid; 391 char *domain = vcspec->domain; 392 int error, isroot; 393 394 isroot = smb_suser(cred) == 0; 395 /* 396 * Only superuser can create VCs with different uid and gid 397 */ 398 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 399 return EPERM; 400 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 401 return EPERM; 402 403 vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK); 404 smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc ilock", "smb_vc", td); 405 vcp->obj.co_free = smb_vc_free; 406 vcp->obj.co_gone = smb_vc_gone; 407 vcp->vc_number = smb_vcnext++; 408 vcp->vc_timo = SMB_DEFRQTIMO; 409 vcp->vc_smbuid = SMB_UID_UNKNOWN; 410 vcp->vc_mode = vcspec->rights & SMBM_MASK; 411 vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE); 412 vcp->vc_tdesc = &smb_tran_nbtcp_desc; 413 vcp->vc_seqno = 0; 414 vcp->vc_mackey = NULL; 415 vcp->vc_mackeylen = 0; 416 417 if (uid == SMBM_ANY_OWNER) 418 uid = realuid; 419 if (gid == SMBM_ANY_GROUP) 420 gid = cred->cr_groups[0]; 421 vcp->vc_uid = uid; 422 vcp->vc_grp = gid; 423 424 smb_sl_init(&vcp->vc_stlock, "vcstlock"); 425 error = ENOMEM; 426 427 vcp->vc_paddr = sodupsockaddr(vcspec->sap, M_WAITOK); 428 if (vcp->vc_paddr == NULL) 429 goto fail; 430 vcp->vc_laddr = sodupsockaddr(vcspec->lap, M_WAITOK); 431 if (vcp->vc_laddr == NULL) 432 goto fail; 433 vcp->vc_pass = smb_strdup(vcspec->pass); 434 if (vcp->vc_pass == NULL) 435 goto fail; 436 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain : 437 "NODOMAIN"); 438 if (vcp->vc_domain == NULL) 439 goto fail; 440 vcp->vc_srvname = smb_strdup(vcspec->srvname); 441 if (vcp->vc_srvname == NULL) 442 goto fail; 443 vcp->vc_username = smb_strdup(vcspec->username); 444 if (vcp->vc_username == NULL) 445 goto fail; 446 error = (int)iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower); 447 if (error) 448 goto fail; 449 error = (int)iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper); 450 if (error) 451 goto fail; 452 if (vcspec->servercs[0]) { 453 error = (int)iconv_open(vcspec->servercs, vcspec->localcs, 454 &vcp->vc_toserver); 455 if (error) 456 goto fail; 457 error = (int)iconv_open(vcspec->localcs, vcspec->servercs, 458 &vcp->vc_tolocal); 459 if (error) 460 goto fail; 461 } 462 error = (int)smb_iod_create(vcp); 463 if (error) 464 goto fail; 465 *vcpp = vcp; 466 smb_co_addchild(&smb_vclist, VCTOCP(vcp)); 467 return (0); 468 469 fail: 470 smb_vc_put(vcp, scred); 471 return (error); 472} 473 474static void 475smb_vc_free(struct smb_connobj *cp) 476{ 477 struct smb_vc *vcp = CPTOVC(cp); 478 479 if (vcp->vc_iod) 480 smb_iod_destroy(vcp->vc_iod); 481 SMB_STRFREE(vcp->vc_username); 482 SMB_STRFREE(vcp->vc_srvname); 483 SMB_STRFREE(vcp->vc_pass); 484 SMB_STRFREE(vcp->vc_domain); 485 if (vcp->vc_mackey) 486 free(vcp->vc_mackey, M_SMBTEMP); 487 if (vcp->vc_paddr) 488 free(vcp->vc_paddr, M_SONAME); 489 if (vcp->vc_laddr) 490 free(vcp->vc_laddr, M_SONAME); 491 if (vcp->vc_tolower) 492 iconv_close(vcp->vc_tolower); 493 if (vcp->vc_toupper) 494 iconv_close(vcp->vc_toupper); 495 if (vcp->vc_tolocal) 496 iconv_close(vcp->vc_tolocal); 497 if (vcp->vc_toserver) 498 iconv_close(vcp->vc_toserver); 499 smb_co_done(VCTOCP(vcp)); 500 smb_sl_destroy(&vcp->vc_stlock); 501 free(vcp, M_SMBCONN); 502} 503 504/* 505 * Called when use count of VC dropped to zero. 506 * VC should be locked on enter with LK_DRAIN. 507 */ 508static void 509smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred) 510{ 511 struct smb_vc *vcp = CPTOVC(cp); 512 513 smb_vc_disconnect(vcp); 514} 515 516void 517smb_vc_ref(struct smb_vc *vcp) 518{ 519 smb_co_ref(VCTOCP(vcp)); 520} 521 522void 523smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred) 524{ 525 smb_co_rele(VCTOCP(vcp), scred); 526} 527 528int 529smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred) 530{ 531 return smb_co_get(VCTOCP(vcp), flags, scred); 532} 533 534void 535smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred) 536{ 537 smb_co_put(VCTOCP(vcp), scred); 538} 539 540int 541smb_vc_lock(struct smb_vc *vcp, int flags, struct thread *td) 542{ 543 return smb_co_lock(VCTOCP(vcp), flags, td); 544} 545 546void 547smb_vc_unlock(struct smb_vc *vcp, int flags, struct thread *td) 548{ 549 smb_co_unlock(VCTOCP(vcp), flags, td); 550} 551 552int 553smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode) 554{ 555 struct ucred *cred = scred->scr_cred; 556 557 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid) 558 return 0; 559 mode >>= 3; 560 if (!groupmember(vcp->vc_grp, cred)) 561 mode >>= 3; 562 return (vcp->vc_mode & mode) == mode ? 0 : EACCES; 563} 564 565static int 566smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp) 567{ 568 int exact = 1; 569 570 if (strcmp(ssp->ss_name, dp->name) != 0) 571 return 1; 572 if (dp->owner != SMBM_ANY_OWNER) { 573 if (ssp->ss_uid != dp->owner) 574 return 1; 575 } else 576 exact = 0; 577 if (dp->group != SMBM_ANY_GROUP) { 578 if (ssp->ss_grp != dp->group) 579 return 1; 580 } else 581 exact = 0; 582 583 if (dp->mode & SMBM_EXACT) { 584 if (!exact) 585 return 1; 586 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1; 587 } 588 if (smb_share_access(ssp, dp->scred, dp->mode) != 0) 589 return 1; 590 return 0; 591} 592 593/* 594 * Lookup share in the given VC. Share referenced and locked on return. 595 * VC expected to be locked on entry and will be left locked on exit. 596 */ 597int 598smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp, 599 struct smb_cred *scred, struct smb_share **sspp) 600{ 601 struct thread *td = scred->scr_td; 602 struct smb_connobj *scp = NULL; 603 struct smb_share *ssp = NULL; 604 int error; 605 606 *sspp = NULL; 607 dp->scred = scred; 608 SMBCO_FOREACH(scp, VCTOCP(vcp)) { 609 ssp = (struct smb_share *)scp; 610 error = smb_share_lock(ssp, LK_EXCLUSIVE, td); 611 if (error) 612 continue; 613 if (smb_vc_cmpshare(ssp, dp) == 0) 614 break; 615 smb_share_unlock(ssp, 0, td); 616 } 617 if (ssp) { 618 smb_share_ref(ssp); 619 *sspp = ssp; 620 error = 0; 621 } else 622 error = ENOENT; 623 return error; 624} 625 626int 627smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 628{ 629 630 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 631} 632 633/* 634 * Destroy VC to server, invalidate shares linked with it. 635 * Transport should be locked on entry. 636 */ 637int 638smb_vc_disconnect(struct smb_vc *vcp) 639{ 640 641 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 642 return 0; 643} 644 645static char smb_emptypass[] = ""; 646 647const char * 648smb_vc_getpass(struct smb_vc *vcp) 649{ 650 if (vcp->vc_pass) 651 return vcp->vc_pass; 652 return smb_emptypass; 653} 654 655static int 656smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip) 657{ 658 bzero(vip, sizeof(struct smb_vc_info)); 659 vip->itype = SMB_INFO_VC; 660 vip->usecount = vcp->obj.co_usecount; 661 vip->uid = vcp->vc_uid; 662 vip->gid = vcp->vc_grp; 663 vip->mode = vcp->vc_mode; 664 vip->flags = vcp->obj.co_flags; 665 vip->sopt = vcp->vc_sopt; 666 vip->iodstate = vcp->vc_iod->iod_state; 667 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey)); 668 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname); 669 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username); 670 return 0; 671} 672 673u_short 674smb_vc_nextmid(struct smb_vc *vcp) 675{ 676 u_short r; 677 678 SMB_CO_LOCK(&vcp->obj); 679 r = vcp->vc_mid++; 680 SMB_CO_UNLOCK(&vcp->obj); 681 return r; 682} 683 684/* 685 * Share implementation 686 */ 687/* 688 * Allocate share structure and attach it to the given VC 689 * Connection expected to be locked on entry. Share will be returned 690 * in locked state. 691 */ 692int 693smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 694 struct smb_cred *scred, struct smb_share **sspp) 695{ 696 struct smb_share *ssp; 697 struct thread *td = scred->scr_td; 698 struct ucred *cred = scred->scr_cred; 699 uid_t realuid = cred->cr_uid; 700 uid_t uid = shspec->owner; 701 gid_t gid = shspec->group; 702 int error, isroot; 703 704 isroot = smb_suser(cred) == 0; 705 /* 706 * Only superuser can create shares with different uid and gid 707 */ 708 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 709 return EPERM; 710 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 711 return EPERM; 712 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp); 713 if (!error) { 714 smb_share_put(ssp, scred); 715 return EEXIST; 716 } 717 if (uid == SMBM_ANY_OWNER) 718 uid = realuid; 719 if (gid == SMBM_ANY_GROUP) 720 gid = cred->cr_groups[0]; 721 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK); 722 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss ilock", "smbss", td); 723 ssp->obj.co_free = smb_share_free; 724 ssp->obj.co_gone = smb_share_gone; 725 smb_sl_init(&ssp->ss_stlock, "ssstlock"); 726 ssp->ss_name = smb_strdup(shspec->name); 727 if (shspec->pass && shspec->pass[0]) 728 ssp->ss_pass = smb_strdup(shspec->pass); 729 ssp->ss_type = shspec->stype; 730 ssp->ss_tid = SMB_TID_UNKNOWN; 731 ssp->ss_uid = uid; 732 ssp->ss_grp = gid; 733 ssp->ss_mode = shspec->rights & SMBM_MASK; 734 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp)); 735 *sspp = ssp; 736 return 0; 737} 738 739static void 740smb_share_free(struct smb_connobj *cp) 741{ 742 struct smb_share *ssp = CPTOSS(cp); 743 744 SMB_STRFREE(ssp->ss_name); 745 SMB_STRFREE(ssp->ss_pass); 746 smb_sl_destroy(&ssp->ss_stlock); 747 smb_co_done(SSTOCP(ssp)); 748 free(ssp, M_SMBCONN); 749} 750 751static void 752smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred) 753{ 754 struct smb_share *ssp = CPTOSS(cp); 755 756 smb_smb_treedisconnect(ssp, scred); 757} 758 759void 760smb_share_ref(struct smb_share *ssp) 761{ 762 smb_co_ref(SSTOCP(ssp)); 763} 764 765void 766smb_share_rele(struct smb_share *ssp, struct smb_cred *scred) 767{ 768 smb_co_rele(SSTOCP(ssp), scred); 769} 770 771int 772smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred) 773{ 774 return smb_co_get(SSTOCP(ssp), flags, scred); 775} 776 777void 778smb_share_put(struct smb_share *ssp, struct smb_cred *scred) 779{ 780 smb_co_put(SSTOCP(ssp), scred); 781} 782 783int 784smb_share_lock(struct smb_share *ssp, int flags, struct thread *td) 785{ 786 return smb_co_lock(SSTOCP(ssp), flags, td); 787} 788 789void 790smb_share_unlock(struct smb_share *ssp, int flags, struct thread *td) 791{ 792 smb_co_unlock(SSTOCP(ssp), flags, td); 793} 794 795int 796smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode) 797{ 798 struct ucred *cred = scred->scr_cred; 799 800 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid) 801 return 0; 802 mode >>= 3; 803 if (!groupmember(ssp->ss_grp, cred)) 804 mode >>= 3; 805 return (ssp->ss_mode & mode) == mode ? 0 : EACCES; 806} 807 808void 809smb_share_invalidate(struct smb_share *ssp) 810{ 811 ssp->ss_tid = SMB_TID_UNKNOWN; 812} 813 814int 815smb_share_valid(struct smb_share *ssp) 816{ 817 return ssp->ss_tid != SMB_TID_UNKNOWN && 818 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid; 819} 820 821const char* 822smb_share_getpass(struct smb_share *ssp) 823{ 824 struct smb_vc *vcp; 825 826 if (ssp->ss_pass) 827 return ssp->ss_pass; 828 vcp = SSTOVC(ssp); 829 if (vcp->vc_pass) 830 return vcp->vc_pass; 831 return smb_emptypass; 832} 833 834static int 835smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip) 836{ 837 bzero(sip, sizeof(struct smb_share_info)); 838 sip->itype = SMB_INFO_SHARE; 839 sip->usecount = ssp->obj.co_usecount; 840 sip->tid = ssp->ss_tid; 841 sip->type= ssp->ss_type; 842 sip->uid = ssp->ss_uid; 843 sip->gid = ssp->ss_grp; 844 sip->mode= ssp->ss_mode; 845 sip->flags = ssp->obj.co_flags; 846 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name); 847 return 0; 848} 849 850/* 851 * Dump an entire tree into sysctl call 852 */ 853static int 854smb_sysctl_treedump(SYSCTL_HANDLER_ARGS) 855{ 856 struct thread *td = req->td; 857 struct smb_cred scred; 858 struct smb_connobj *scp1, *scp2; 859 struct smb_vc *vcp; 860 struct smb_share *ssp; 861 struct smb_vc_info vci; 862 struct smb_share_info ssi; 863 int error, itype; 864 865 smb_makescred(&scred, td, td->td_ucred); 866 error = sysctl_wire_old_buffer(req, 0); 867 if (error) 868 return (error); 869 error = smb_sm_lockvclist(LK_SHARED, td); 870 if (error) 871 return error; 872 SMBCO_FOREACH(scp1, &smb_vclist) { 873 vcp = (struct smb_vc *)scp1; 874 error = smb_vc_lock(vcp, LK_SHARED, td); 875 if (error) 876 continue; 877 smb_vc_getinfo(vcp, &vci); 878 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info)); 879 if (error) { 880 smb_vc_unlock(vcp, 0, td); 881 break; 882 } 883 SMBCO_FOREACH(scp2, VCTOCP(vcp)) { 884 ssp = (struct smb_share *)scp2; 885 error = smb_share_lock(ssp, LK_SHARED, td); 886 if (error) { 887 error = 0; 888 continue; 889 } 890 smb_share_getinfo(ssp, &ssi); 891 smb_share_unlock(ssp, 0, td); 892 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info)); 893 if (error) 894 break; 895 } 896 smb_vc_unlock(vcp, 0, td); 897 if (error) 898 break; 899 } 900 if (!error) { 901 itype = SMB_INFO_NONE; 902 error = SYSCTL_OUT(req, &itype, sizeof(itype)); 903 } 904 smb_sm_unlockvclist(td); 905 return error; 906} 907