Now available: 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: releng/5.2/sys/netsmb/smb_conn.c 119376 2003-08-23 21:43:33Z marcel $"); 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 SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol"); 61 62 MALLOC_DEFINE(M_SMBCONN, "SMB conn", "SMB connection"); 63 64 static void smb_co_init(struct smb_connobj *cp, int level, char *objname, 65 struct thread *td); 66 static void smb_co_done(struct smb_connobj *cp); 67 static int smb_co_lockstatus(struct smb_connobj *cp, struct thread *td); 68 69 static int smb_vc_disconnect(struct smb_vc *vcp); 70 static void smb_vc_free(struct smb_connobj *cp); 71 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred); 72 static smb_co_free_t smb_share_free; 73 static smb_co_gone_t smb_share_gone; 74 75 static int smb_sysctl_treedump(SYSCTL_HANDLER_ARGS); 76 77 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE, 78 NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree"); 79 80 int 81 smb_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 89 int 90 smb_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 smb_co_done(&smb_vclist); 99 return 0; 100 } 101 102 static int 103 smb_sm_lockvclist(int flags, struct thread *td) 104 { 105 106 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE, td); 107 } 108 109 static void 110 smb_sm_unlockvclist(struct thread *td) 111 { 112 113 smb_co_unlock(&smb_vclist, LK_RELEASE, td); 114 } 115 116 static int 117 smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 118 struct smb_cred *scred, struct smb_vc **vcpp) 119 { 120 struct thread *td = scred->scr_td; 121 struct smb_vc *vcp; 122 int exact = 1; 123 int error; 124 125 vcspec->shspec = shspec; 126 error = ENOENT; 127 SMBCO_FOREACH((struct smb_connobj*)vcp, &smb_vclist) { 128 error = smb_vc_lock(vcp, LK_EXCLUSIVE, td); 129 if (error) 130 continue; 131 132 if ((vcp->obj.co_flags & SMBV_PRIVATE) || 133 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) || 134 strcmp(vcp->vc_username, vcspec->username) != 0) 135 goto err1; 136 if (vcspec->owner != SMBM_ANY_OWNER) { 137 if (vcp->vc_uid != vcspec->owner) 138 goto err1; 139 } else 140 exact = 0; 141 if (vcspec->group != SMBM_ANY_GROUP) { 142 if (vcp->vc_grp != vcspec->group) 143 goto err1; 144 } else 145 exact = 0; 146 if (vcspec->mode & SMBM_EXACT) { 147 if (!exact || (vcspec->mode & SMBM_MASK) != 148 vcp->vc_mode) 149 goto err1; 150 } 151 if (smb_vc_access(vcp, scred, vcspec->mode) != 0) 152 goto err1; 153 vcspec->ssp = NULL; 154 if (shspec) { 155 error = (int)smb_vc_lookupshare(vcp, shspec, scred, 156 &vcspec->ssp); 157 if (error) 158 goto fail; 159 } 160 error = 0; 161 break; 162 err1: 163 error = 1; 164 fail: 165 smb_vc_unlock(vcp, 0, td); 166 } 167 if (vcp) { 168 smb_vc_ref(vcp); 169 *vcpp = vcp; 170 } 171 return (error); 172 } 173 174 int 175 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 176 struct smb_cred *scred, struct smb_vc **vcpp) 177 { 178 struct thread *td = scred->scr_td; 179 struct smb_vc *vcp; 180 struct smb_share *ssp = NULL; 181 int error; 182 183 *vcpp = vcp = NULL; 184 185 error = smb_sm_lockvclist(LK_EXCLUSIVE, td); 186 if (error) 187 return error; 188 error = smb_sm_lookupint(vcspec, shspec, scred, vcpp); 189 if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) { 190 smb_sm_unlockvclist(td); 191 return error; 192 } 193 error = smb_sm_lookupint(vcspec, NULL, scred, &vcp); 194 if (error) { 195 error = smb_vc_create(vcspec, scred, &vcp); 196 if (error) 197 goto out; 198 error = smb_vc_connect(vcp, scred); 199 if (error) 200 goto out; 201 } 202 if (shspec == NULL) 203 goto out; 204 error = smb_share_create(vcp, shspec, scred, &ssp); 205 if (error) 206 goto out; 207 error = smb_smb_treeconnect(ssp, scred); 208 if (error == 0) 209 vcspec->ssp = ssp; 210 else 211 smb_share_put(ssp, scred); 212 out: 213 smb_sm_unlockvclist(td); 214 if (error == 0) 215 *vcpp = vcp; 216 else if (vcp) 217 smb_vc_put(vcp, scred); 218 return error; 219 } 220 221 /* 222 * Common code for connection object 223 */ 224 static void 225 smb_co_init(struct smb_connobj *cp, int level, char *objname, struct thread *td) 226 { 227 SLIST_INIT(&cp->co_children); 228 smb_sl_init(&cp->co_interlock, objname); 229 lockinit(&cp->co_lock, PZERO, objname, 0, 0); 230 cp->co_level = level; 231 cp->co_usecount = 1; 232 KASSERT(smb_co_lock(cp, LK_EXCLUSIVE, td) == 0, ("smb_co_init: lock failed")); 233 } 234 235 static void 236 smb_co_done(struct smb_connobj *cp) 237 { 238 smb_sl_destroy(&cp->co_interlock); 239 lockdestroy(&cp->co_lock); 240 } 241 242 static void 243 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred) 244 { 245 struct smb_connobj *parent; 246 247 if (cp->co_gone) 248 cp->co_gone(cp, scred); 249 parent = cp->co_parent; 250 if (parent) { 251 smb_co_lock(parent, LK_EXCLUSIVE, scred->scr_td); 252 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next); 253 smb_co_put(parent, scred); 254 } 255 if (cp->co_free) 256 cp->co_free(cp); 257 } 258 259 void 260 smb_co_ref(struct smb_connobj *cp) 261 { 262 263 SMB_CO_LOCK(cp); 264 cp->co_usecount++; 265 SMB_CO_UNLOCK(cp); 266 } 267 268 void 269 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred) 270 { 271 struct thread *td = scred->scr_td; 272 273 SMB_CO_LOCK(cp); 274 if (cp->co_usecount > 1) { 275 cp->co_usecount--; 276 SMB_CO_UNLOCK(cp); 277 return; 278 } 279 if (cp->co_usecount == 0) { 280 SMBERROR("negative use_count for object %d", cp->co_level); 281 SMB_CO_UNLOCK(cp); 282 return; 283 } 284 cp->co_usecount--; 285 cp->co_flags |= SMBO_GONE; 286 287 lockmgr(&cp->co_lock, LK_DRAIN | LK_INTERLOCK, &cp->co_interlock, td); 288 smb_co_gone(cp, scred); 289 } 290 291 int 292 smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred) 293 { 294 int error; 295 296 if ((flags & LK_INTERLOCK) == 0) 297 SMB_CO_LOCK(cp); 298 cp->co_usecount++; 299 error = smb_co_lock(cp, flags | LK_INTERLOCK, scred->scr_td); 300 if (error) { 301 SMB_CO_LOCK(cp); 302 cp->co_usecount--; 303 SMB_CO_UNLOCK(cp); 304 return error; 305 } 306 return 0; 307 } 308 309 void 310 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred) 311 { 312 struct thread *td = scred->scr_td; 313 int flags; 314 315 flags = LK_RELEASE; 316 SMB_CO_LOCK(cp); 317 if (cp->co_usecount > 1) { 318 cp->co_usecount--; 319 } else if (cp->co_usecount == 1) { 320 cp->co_usecount--; 321 cp->co_flags |= SMBO_GONE; 322 flags = LK_DRAIN; 323 } else { 324 SMBERROR("negative usecount"); 325 } 326 lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock, td); 327 if ((cp->co_flags & SMBO_GONE) == 0) 328 return; 329 lockmgr(&cp->co_lock, LK_DRAIN, NULL, td); 330 smb_co_gone(cp, scred); 331 } 332 333 int 334 smb_co_lockstatus(struct smb_connobj *cp, struct thread *td) 335 { 336 return lockstatus(&cp->co_lock, td); 337 } 338 339 int 340 smb_co_lock(struct smb_connobj *cp, int flags, struct thread *td) 341 { 342 343 if (cp->co_flags & SMBO_GONE) 344 return EINVAL; 345 if ((flags & LK_TYPE_MASK) == 0) 346 flags |= LK_EXCLUSIVE; 347 if (smb_co_lockstatus(cp, td) == LK_EXCLUSIVE && 348 (flags & LK_CANRECURSE) == 0) { 349 SMBERROR("recursive lock for object %d\n", cp->co_level); 350 return 0; 351 } 352 return lockmgr(&cp->co_lock, flags, &cp->co_interlock, td); 353 } 354 355 void 356 smb_co_unlock(struct smb_connobj *cp, int flags, struct thread *td) 357 { 358 (void)lockmgr(&cp->co_lock, flags | LK_RELEASE, &cp->co_interlock, td); 359 } 360 361 static void 362 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child) 363 { 364 KASSERT(smb_co_lockstatus(parent, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: parent not locked")); 365 KASSERT(smb_co_lockstatus(child, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: child not locked")); 366 367 smb_co_ref(parent); 368 SLIST_INSERT_HEAD(&parent->co_children, child, co_next); 369 child->co_parent = parent; 370 } 371 372 /* 373 * Session implementation 374 */ 375 376 int 377 smb_vc_create(struct smb_vcspec *vcspec, 378 struct smb_cred *scred, struct smb_vc **vcpp) 379 { 380 struct smb_vc *vcp; 381 struct thread *td = scred->scr_td; 382 struct ucred *cred = scred->scr_cred; 383 uid_t uid = vcspec->owner; 384 gid_t gid = vcspec->group; 385 uid_t realuid = cred->cr_uid; 386 char *domain = vcspec->domain; 387 int error, isroot; 388 389 isroot = smb_suser(cred) == 0; 390 /* 391 * Only superuser can create VCs with different uid and gid 392 */ 393 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 394 return EPERM; 395 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 396 return EPERM; 397 398 vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK); 399 smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc", td); 400 vcp->obj.co_free = smb_vc_free; 401 vcp->obj.co_gone = smb_vc_gone; 402 vcp->vc_number = smb_vcnext++; 403 vcp->vc_timo = SMB_DEFRQTIMO; 404 vcp->vc_smbuid = SMB_UID_UNKNOWN; 405 vcp->vc_mode = vcspec->rights & SMBM_MASK; 406 vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE); 407 vcp->vc_tdesc = &smb_tran_nbtcp_desc; 408 409 if (uid == SMBM_ANY_OWNER) 410 uid = realuid; 411 if (gid == SMBM_ANY_GROUP) 412 gid = cred->cr_groups[0]; 413 vcp->vc_uid = uid; 414 vcp->vc_grp = gid; 415 416 smb_sl_init(&vcp->vc_stlock, "vcstlock"); 417 error = ENOMEM; 418 419 vcp->vc_paddr = dup_sockaddr(vcspec->sap, 1); 420 if (vcp->vc_paddr == NULL) 421 goto fail; 422 vcp->vc_laddr = dup_sockaddr(vcspec->lap, 1); 423 if (vcp->vc_laddr == NULL) 424 goto fail; 425 vcp->vc_pass = smb_strdup(vcspec->pass); 426 if (vcp->vc_pass == NULL) 427 goto fail; 428 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain : 429 "NODOMAIN"); 430 if (vcp->vc_domain == NULL) 431 goto fail; 432 vcp->vc_srvname = smb_strdup(vcspec->srvname); 433 if (vcp->vc_srvname == NULL) 434 goto fail; 435 vcp->vc_username = smb_strdup(vcspec->username); 436 if (vcp->vc_username == NULL) 437 goto fail; 438 error = (int)iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower); 439 if (error) 440 goto fail; 441 error = (int)iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper); 442 if (error) 443 goto fail; 444 if (vcspec->servercs[0]) { 445 error = (int)iconv_open(vcspec->servercs, vcspec->localcs, 446 &vcp->vc_toserver); 447 if (error) 448 goto fail; 449 error = (int)iconv_open(vcspec->localcs, vcspec->servercs, 450 &vcp->vc_tolocal); 451 if (error) 452 goto fail; 453 } 454 error = (int)smb_iod_create(vcp); 455 if (error) 456 goto fail; 457 *vcpp = vcp; 458 smb_co_addchild(&smb_vclist, VCTOCP(vcp)); 459 return (0); 460 461 fail: 462 smb_vc_put(vcp, scred); 463 return (error); 464 } 465 466 static void 467 smb_vc_free(struct smb_connobj *cp) 468 { 469 struct smb_vc *vcp = CPTOVC(cp); 470 471 if (vcp->vc_iod) 472 smb_iod_destroy(vcp->vc_iod); 473 SMB_STRFREE(vcp->vc_username); 474 SMB_STRFREE(vcp->vc_srvname); 475 SMB_STRFREE(vcp->vc_pass); 476 SMB_STRFREE(vcp->vc_domain); 477 if (vcp->vc_paddr) 478 free(vcp->vc_paddr, M_SONAME); 479 if (vcp->vc_laddr) 480 free(vcp->vc_laddr, M_SONAME); 481 if (vcp->vc_tolower) 482 iconv_close(vcp->vc_tolower); 483 if (vcp->vc_toupper) 484 iconv_close(vcp->vc_toupper); 485 if (vcp->vc_tolocal) 486 iconv_close(vcp->vc_tolocal); 487 if (vcp->vc_toserver) 488 iconv_close(vcp->vc_toserver); 489 smb_co_done(VCTOCP(vcp)); 490 smb_sl_destroy(&vcp->vc_stlock); 491 free(vcp, M_SMBCONN); 492 } 493 494 /* 495 * Called when use count of VC dropped to zero. 496 * VC should be locked on enter with LK_DRAIN. 497 */ 498 static void 499 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred) 500 { 501 struct smb_vc *vcp = CPTOVC(cp); 502 503 smb_vc_disconnect(vcp); 504 } 505 506 void 507 smb_vc_ref(struct smb_vc *vcp) 508 { 509 smb_co_ref(VCTOCP(vcp)); 510 } 511 512 void 513 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred) 514 { 515 smb_co_rele(VCTOCP(vcp), scred); 516 } 517 518 int 519 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred) 520 { 521 return smb_co_get(VCTOCP(vcp), flags, scred); 522 } 523 524 void 525 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred) 526 { 527 smb_co_put(VCTOCP(vcp), scred); 528 } 529 530 int 531 smb_vc_lock(struct smb_vc *vcp, int flags, struct thread *td) 532 { 533 return smb_co_lock(VCTOCP(vcp), flags, td); 534 } 535 536 void 537 smb_vc_unlock(struct smb_vc *vcp, int flags, struct thread *td) 538 { 539 smb_co_unlock(VCTOCP(vcp), flags, td); 540 } 541 542 int 543 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode) 544 { 545 struct ucred *cred = scred->scr_cred; 546 547 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid) 548 return 0; 549 mode >>= 3; 550 if (!groupmember(vcp->vc_grp, cred)) 551 mode >>= 3; 552 return (vcp->vc_mode & mode) == mode ? 0 : EACCES; 553 } 554 555 static int 556 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp) 557 { 558 int exact = 1; 559 560 if (strcmp(ssp->ss_name, dp->name) != 0) 561 return 1; 562 if (dp->owner != SMBM_ANY_OWNER) { 563 if (ssp->ss_uid != dp->owner) 564 return 1; 565 } else 566 exact = 0; 567 if (dp->group != SMBM_ANY_GROUP) { 568 if (ssp->ss_grp != dp->group) 569 return 1; 570 } else 571 exact = 0; 572 573 if (dp->mode & SMBM_EXACT) { 574 if (!exact) 575 return 1; 576 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1; 577 } 578 if (smb_share_access(ssp, dp->scred, dp->mode) != 0) 579 return 1; 580 return 0; 581 } 582 583 /* 584 * Lookup share in the given VC. Share referenced and locked on return. 585 * VC expected to be locked on entry and will be left locked on exit. 586 */ 587 int 588 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp, 589 struct smb_cred *scred, struct smb_share **sspp) 590 { 591 struct thread *td = scred->scr_td; 592 struct smb_share *ssp = NULL; 593 int error; 594 595 *sspp = NULL; 596 dp->scred = scred; 597 SMBCO_FOREACH((struct smb_connobj*)ssp, VCTOCP(vcp)) { 598 error = smb_share_lock(ssp, LK_EXCLUSIVE, td); 599 if (error) 600 continue; 601 if (smb_vc_cmpshare(ssp, dp) == 0) 602 break; 603 smb_share_unlock(ssp, 0, td); 604 } 605 if (ssp) { 606 smb_share_ref(ssp); 607 *sspp = ssp; 608 error = 0; 609 } else 610 error = ENOENT; 611 return error; 612 } 613 614 int 615 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 616 { 617 618 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 619 } 620 621 /* 622 * Destroy VC to server, invalidate shares linked with it. 623 * Transport should be locked on entry. 624 */ 625 int 626 smb_vc_disconnect(struct smb_vc *vcp) 627 { 628 629 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 630 return 0; 631 } 632 633 static char smb_emptypass[] = ""; 634 635 const char * 636 smb_vc_getpass(struct smb_vc *vcp) 637 { 638 if (vcp->vc_pass) 639 return vcp->vc_pass; 640 return smb_emptypass; 641 } 642 643 static int 644 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip) 645 { 646 bzero(vip, sizeof(struct smb_vc_info)); 647 vip->itype = SMB_INFO_VC; 648 vip->usecount = vcp->obj.co_usecount; 649 vip->uid = vcp->vc_uid; 650 vip->gid = vcp->vc_grp; 651 vip->mode = vcp->vc_mode; 652 vip->flags = vcp->obj.co_flags; 653 vip->sopt = vcp->vc_sopt; 654 vip->iodstate = vcp->vc_iod->iod_state; 655 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey)); 656 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname); 657 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username); 658 return 0; 659 } 660 661 u_short 662 smb_vc_nextmid(struct smb_vc *vcp) 663 { 664 u_short r; 665 666 SMB_CO_LOCK(&vcp->obj); 667 r = vcp->vc_mid++; 668 SMB_CO_UNLOCK(&vcp->obj); 669 return r; 670 } 671 672 /* 673 * Share implementation 674 */ 675 /* 676 * Allocate share structure and attach it to the given VC 677 * Connection expected to be locked on entry. Share will be returned 678 * in locked state. 679 */ 680 int 681 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 682 struct smb_cred *scred, struct smb_share **sspp) 683 { 684 struct smb_share *ssp; 685 struct thread *td = scred->scr_td; 686 struct ucred *cred = scred->scr_cred; 687 uid_t realuid = cred->cr_uid; 688 uid_t uid = shspec->owner; 689 gid_t gid = shspec->group; 690 int error, isroot; 691 692 isroot = smb_suser(cred) == 0; 693 /* 694 * Only superuser can create shares with different uid and gid 695 */ 696 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 697 return EPERM; 698 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 699 return EPERM; 700 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp); 701 if (!error) { 702 smb_share_put(ssp, scred); 703 return EEXIST; 704 } 705 if (uid == SMBM_ANY_OWNER) 706 uid = realuid; 707 if (gid == SMBM_ANY_GROUP) 708 gid = cred->cr_groups[0]; 709 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK); 710 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss", td); 711 ssp->obj.co_free = smb_share_free; 712 ssp->obj.co_gone = smb_share_gone; 713 smb_sl_init(&ssp->ss_stlock, "ssstlock"); 714 ssp->ss_name = smb_strdup(shspec->name); 715 if (shspec->pass && shspec->pass[0]) 716 ssp->ss_pass = smb_strdup(shspec->pass); 717 ssp->ss_type = shspec->stype; 718 ssp->ss_tid = SMB_TID_UNKNOWN; 719 ssp->ss_uid = uid; 720 ssp->ss_grp = gid; 721 ssp->ss_mode = shspec->rights & SMBM_MASK; 722 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp)); 723 *sspp = ssp; 724 return 0; 725 } 726 727 static void 728 smb_share_free(struct smb_connobj *cp) 729 { 730 struct smb_share *ssp = CPTOSS(cp); 731 732 SMB_STRFREE(ssp->ss_name); 733 SMB_STRFREE(ssp->ss_pass); 734 smb_sl_destroy(&ssp->ss_stlock); 735 smb_co_done(SSTOCP(ssp)); 736 free(ssp, M_SMBCONN); 737 } 738 739 static void 740 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred) 741 { 742 struct smb_share *ssp = CPTOSS(cp); 743 744 smb_smb_treedisconnect(ssp, scred); 745 } 746 747 void 748 smb_share_ref(struct smb_share *ssp) 749 { 750 smb_co_ref(SSTOCP(ssp)); 751 } 752 753 void 754 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred) 755 { 756 smb_co_rele(SSTOCP(ssp), scred); 757 } 758 759 int 760 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred) 761 { 762 return smb_co_get(SSTOCP(ssp), flags, scred); 763 } 764 765 void 766 smb_share_put(struct smb_share *ssp, struct smb_cred *scred) 767 { 768 smb_co_put(SSTOCP(ssp), scred); 769 } 770 771 int 772 smb_share_lock(struct smb_share *ssp, int flags, struct thread *td) 773 { 774 return smb_co_lock(SSTOCP(ssp), flags, td); 775 } 776 777 void 778 smb_share_unlock(struct smb_share *ssp, int flags, struct thread *td) 779 { 780 smb_co_unlock(SSTOCP(ssp), flags, td); 781 } 782 783 int 784 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode) 785 { 786 struct ucred *cred = scred->scr_cred; 787 788 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid) 789 return 0; 790 mode >>= 3; 791 if (!groupmember(ssp->ss_grp, cred)) 792 mode >>= 3; 793 return (ssp->ss_mode & mode) == mode ? 0 : EACCES; 794 } 795 796 void 797 smb_share_invalidate(struct smb_share *ssp) 798 { 799 ssp->ss_tid = SMB_TID_UNKNOWN; 800 } 801 802 int 803 smb_share_valid(struct smb_share *ssp) 804 { 805 return ssp->ss_tid != SMB_TID_UNKNOWN && 806 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid; 807 } 808 809 const char* 810 smb_share_getpass(struct smb_share *ssp) 811 { 812 struct smb_vc *vcp; 813 814 if (ssp->ss_pass) 815 return ssp->ss_pass; 816 vcp = SSTOVC(ssp); 817 if (vcp->vc_pass) 818 return vcp->vc_pass; 819 return smb_emptypass; 820 } 821 822 static int 823 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip) 824 { 825 bzero(sip, sizeof(struct smb_share_info)); 826 sip->itype = SMB_INFO_SHARE; 827 sip->usecount = ssp->obj.co_usecount; 828 sip->tid = ssp->ss_tid; 829 sip->type= ssp->ss_type; 830 sip->uid = ssp->ss_uid; 831 sip->gid = ssp->ss_grp; 832 sip->mode= ssp->ss_mode; 833 sip->flags = ssp->obj.co_flags; 834 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name); 835 return 0; 836 } 837 838 /* 839 * Dump an entire tree into sysctl call 840 */ 841 static int 842 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS) 843 { 844 struct thread *td = req->td; 845 struct smb_cred scred; 846 struct smb_vc *vcp; 847 struct smb_share *ssp; 848 struct smb_vc_info vci; 849 struct smb_share_info ssi; 850 int error, itype; 851 852 smb_makescred(&scred, td, td->td_ucred); 853 sysctl_wire_old_buffer(req, 0); 854 error = smb_sm_lockvclist(LK_SHARED, td); 855 if (error) 856 return error; 857 SMBCO_FOREACH((struct smb_connobj*)vcp, &smb_vclist) { 858 error = smb_vc_lock(vcp, LK_SHARED, td); 859 if (error) 860 continue; 861 smb_vc_getinfo(vcp, &vci); 862 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info)); 863 if (error) { 864 smb_vc_unlock(vcp, 0, td); 865 break; 866 } 867 SMBCO_FOREACH((struct smb_connobj*)ssp, VCTOCP(vcp)) { 868 error = smb_share_lock(ssp, LK_SHARED, td); 869 if (error) { 870 error = 0; 871 continue; 872 } 873 smb_share_getinfo(ssp, &ssi); 874 smb_share_unlock(ssp, 0, td); 875 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info)); 876 if (error) 877 break; 878 } 879 smb_vc_unlock(vcp, 0, td); 880 if (error) 881 break; 882 } 883 if (!error) { 884 itype = SMB_INFO_NONE; 885 error = SYSCTL_OUT(req, &itype, sizeof(itype)); 886 } 887 smb_sm_unlockvclist(td); 888 return error; 889 }
Cache object: 0ad1acf8558db8c478e66d239c863262
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