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 * $FreeBSD: releng/5.1/sys/netsmb/smb_conn.c 111119 2003-02-19 05:47:46Z imp $ 33 */ 34 35 /* 36 * Connection engine. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/malloc.h> 43 #include <sys/proc.h> 44 #include <sys/lock.h> 45 #include <sys/sysctl.h> 46 #include <sys/socketvar.h> 47 48 #include <sys/iconv.h> 49 50 #include <netsmb/smb.h> 51 #include <netsmb/smb_subr.h> 52 #include <netsmb/smb_conn.h> 53 #include <netsmb/smb_tran.h> 54 #include <netsmb/smb_trantcp.h> 55 56 static struct smb_connobj smb_vclist; 57 static int smb_vcnext = 1; /* next unique id for VC */ 58 59 SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol"); 60 61 MALLOC_DEFINE(M_SMBCONN, "SMB conn", "SMB connection"); 62 63 static void smb_co_init(struct smb_connobj *cp, int level, char *objname, 64 struct thread *td); 65 static void smb_co_done(struct smb_connobj *cp); 66 static int smb_co_lockstatus(struct smb_connobj *cp, struct thread *td); 67 68 static int smb_vc_disconnect(struct smb_vc *vcp); 69 static void smb_vc_free(struct smb_connobj *cp); 70 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred); 71 static smb_co_free_t smb_share_free; 72 static smb_co_gone_t smb_share_gone; 73 74 static int smb_sysctl_treedump(SYSCTL_HANDLER_ARGS); 75 76 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE, 77 NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree"); 78 79 int 80 smb_sm_init(void) 81 { 82 83 smb_co_init(&smb_vclist, SMBL_SM, "smbsm", curthread); 84 smb_co_unlock(&smb_vclist, 0, curthread); 85 return 0; 86 } 87 88 int 89 smb_sm_done(void) 90 { 91 92 /* XXX: hold the mutex */ 93 if (smb_vclist.co_usecount > 1) { 94 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1); 95 return EBUSY; 96 } 97 smb_co_done(&smb_vclist); 98 return 0; 99 } 100 101 static int 102 smb_sm_lockvclist(int flags, struct thread *td) 103 { 104 105 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE, td); 106 } 107 108 static void 109 smb_sm_unlockvclist(struct thread *td) 110 { 111 112 smb_co_unlock(&smb_vclist, LK_RELEASE, td); 113 } 114 115 static int 116 smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 117 struct smb_cred *scred, struct smb_vc **vcpp) 118 { 119 struct thread *td = scred->scr_td; 120 struct smb_vc *vcp; 121 int exact = 1; 122 int error; 123 124 vcspec->shspec = shspec; 125 error = ENOENT; 126 SMBCO_FOREACH((struct smb_connobj*)vcp, &smb_vclist) { 127 error = smb_vc_lock(vcp, LK_EXCLUSIVE, td); 128 if (error) 129 continue; 130 itry { 131 if ((vcp->obj.co_flags & SMBV_PRIVATE) || 132 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) || 133 strcmp(vcp->vc_username, vcspec->username) != 0) 134 ithrow(1); 135 if (vcspec->owner != SMBM_ANY_OWNER) { 136 if (vcp->vc_uid != vcspec->owner) 137 ithrow(1); 138 } else 139 exact = 0; 140 if (vcspec->group != SMBM_ANY_GROUP) { 141 if (vcp->vc_grp != vcspec->group) 142 ithrow(1); 143 } else 144 exact = 0; 145 146 if (vcspec->mode & SMBM_EXACT) { 147 if (!exact || 148 (vcspec->mode & SMBM_MASK) != vcp->vc_mode) 149 ithrow(1); 150 } 151 if (smb_vc_access(vcp, scred, vcspec->mode) != 0) 152 ithrow(1); 153 vcspec->ssp = NULL; 154 if (shspec) 155 ithrow(smb_vc_lookupshare(vcp, shspec, scred, &vcspec->ssp)); 156 error = 0; 157 break; 158 } icatch(error) { 159 smb_vc_unlock(vcp, 0, td); 160 } ifinally { 161 } iendtry; 162 if (error == 0) 163 break; 164 } 165 if (vcp) { 166 smb_vc_ref(vcp); 167 *vcpp = vcp; 168 } 169 return error; 170 } 171 172 int 173 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 174 struct smb_cred *scred, struct smb_vc **vcpp) 175 { 176 struct thread *td = scred->scr_td; 177 struct smb_vc *vcp; 178 struct smb_share *ssp = NULL; 179 int error; 180 181 *vcpp = vcp = NULL; 182 183 error = smb_sm_lockvclist(LK_EXCLUSIVE, td); 184 if (error) 185 return error; 186 error = smb_sm_lookupint(vcspec, shspec, scred, vcpp); 187 if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) { 188 smb_sm_unlockvclist(td); 189 return error; 190 } 191 error = smb_sm_lookupint(vcspec, NULL, scred, &vcp); 192 if (error) { 193 error = smb_vc_create(vcspec, scred, &vcp); 194 if (error) 195 goto out; 196 error = smb_vc_connect(vcp, scred); 197 if (error) 198 goto out; 199 } 200 if (shspec == NULL) 201 goto out; 202 error = smb_share_create(vcp, shspec, scred, &ssp); 203 if (error) 204 goto out; 205 error = smb_smb_treeconnect(ssp, scred); 206 if (error == 0) 207 vcspec->ssp = ssp; 208 else 209 smb_share_put(ssp, scred); 210 out: 211 smb_sm_unlockvclist(td); 212 if (error == 0) 213 *vcpp = vcp; 214 else if (vcp) 215 smb_vc_put(vcp, scred); 216 return error; 217 } 218 219 /* 220 * Common code for connection object 221 */ 222 static void 223 smb_co_init(struct smb_connobj *cp, int level, char *objname, struct thread *td) 224 { 225 SLIST_INIT(&cp->co_children); 226 smb_sl_init(&cp->co_interlock, objname); 227 lockinit(&cp->co_lock, PZERO, objname, 0, 0); 228 cp->co_level = level; 229 cp->co_usecount = 1; 230 KASSERT(smb_co_lock(cp, LK_EXCLUSIVE, td) == 0, ("smb_co_init: lock failed")); 231 } 232 233 static void 234 smb_co_done(struct smb_connobj *cp) 235 { 236 smb_sl_destroy(&cp->co_interlock); 237 lockdestroy(&cp->co_lock); 238 } 239 240 static void 241 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred) 242 { 243 struct smb_connobj *parent; 244 245 if (cp->co_gone) 246 cp->co_gone(cp, scred); 247 parent = cp->co_parent; 248 if (parent) { 249 smb_co_lock(parent, LK_EXCLUSIVE, scred->scr_td); 250 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next); 251 smb_co_put(parent, scred); 252 } 253 if (cp->co_free) 254 cp->co_free(cp); 255 } 256 257 void 258 smb_co_ref(struct smb_connobj *cp) 259 { 260 261 SMB_CO_LOCK(cp); 262 cp->co_usecount++; 263 SMB_CO_UNLOCK(cp); 264 } 265 266 void 267 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred) 268 { 269 struct thread *td = scred->scr_td; 270 271 SMB_CO_LOCK(cp); 272 if (cp->co_usecount > 1) { 273 cp->co_usecount--; 274 SMB_CO_UNLOCK(cp); 275 return; 276 } 277 if (cp->co_usecount == 0) { 278 SMBERROR("negative use_count for object %d", cp->co_level); 279 SMB_CO_UNLOCK(cp); 280 return; 281 } 282 cp->co_usecount--; 283 cp->co_flags |= SMBO_GONE; 284 285 lockmgr(&cp->co_lock, LK_DRAIN | LK_INTERLOCK, &cp->co_interlock, td); 286 smb_co_gone(cp, scred); 287 } 288 289 int 290 smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred) 291 { 292 int error; 293 294 if ((flags & LK_INTERLOCK) == 0) 295 SMB_CO_LOCK(cp); 296 cp->co_usecount++; 297 error = smb_co_lock(cp, flags | LK_INTERLOCK, scred->scr_td); 298 if (error) { 299 SMB_CO_LOCK(cp); 300 cp->co_usecount--; 301 SMB_CO_UNLOCK(cp); 302 return error; 303 } 304 return 0; 305 } 306 307 void 308 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred) 309 { 310 struct thread *td = scred->scr_td; 311 int flags; 312 313 flags = LK_RELEASE; 314 SMB_CO_LOCK(cp); 315 if (cp->co_usecount > 1) { 316 cp->co_usecount--; 317 } else if (cp->co_usecount == 1) { 318 cp->co_usecount--; 319 cp->co_flags |= SMBO_GONE; 320 flags = LK_DRAIN; 321 } else { 322 SMBERROR("negative usecount"); 323 } 324 lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock, td); 325 if ((cp->co_flags & SMBO_GONE) == 0) 326 return; 327 lockmgr(&cp->co_lock, LK_DRAIN, NULL, td); 328 smb_co_gone(cp, scred); 329 } 330 331 int 332 smb_co_lockstatus(struct smb_connobj *cp, struct thread *td) 333 { 334 return lockstatus(&cp->co_lock, td); 335 } 336 337 int 338 smb_co_lock(struct smb_connobj *cp, int flags, struct thread *td) 339 { 340 341 if (cp->co_flags & SMBO_GONE) 342 return EINVAL; 343 if ((flags & LK_TYPE_MASK) == 0) 344 flags |= LK_EXCLUSIVE; 345 if (smb_co_lockstatus(cp, td) == LK_EXCLUSIVE && 346 (flags & LK_CANRECURSE) == 0) { 347 SMBERROR("recursive lock for object %d\n", cp->co_level); 348 return 0; 349 } 350 return lockmgr(&cp->co_lock, flags, &cp->co_interlock, td); 351 } 352 353 void 354 smb_co_unlock(struct smb_connobj *cp, int flags, struct thread *td) 355 { 356 (void)lockmgr(&cp->co_lock, flags | LK_RELEASE, &cp->co_interlock, td); 357 } 358 359 static void 360 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child) 361 { 362 KASSERT(smb_co_lockstatus(parent, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: parent not locked")); 363 KASSERT(smb_co_lockstatus(child, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: child not locked")); 364 365 smb_co_ref(parent); 366 SLIST_INSERT_HEAD(&parent->co_children, child, co_next); 367 child->co_parent = parent; 368 } 369 370 /* 371 * Session implementation 372 */ 373 374 int 375 smb_vc_create(struct smb_vcspec *vcspec, 376 struct smb_cred *scred, struct smb_vc **vcpp) 377 { 378 struct smb_vc *vcp; 379 struct thread *td = scred->scr_td; 380 struct ucred *cred = scred->scr_cred; 381 uid_t uid = vcspec->owner; 382 gid_t gid = vcspec->group; 383 uid_t realuid = cred->cr_uid; 384 char *domain = vcspec->domain; 385 int error, isroot; 386 387 isroot = smb_suser(cred) == 0; 388 /* 389 * Only superuser can create VCs with different uid and gid 390 */ 391 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 392 return EPERM; 393 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 394 return EPERM; 395 396 vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK); 397 smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc", td); 398 vcp->obj.co_free = smb_vc_free; 399 vcp->obj.co_gone = smb_vc_gone; 400 vcp->vc_number = smb_vcnext++; 401 vcp->vc_timo = SMB_DEFRQTIMO; 402 vcp->vc_smbuid = SMB_UID_UNKNOWN; 403 vcp->vc_mode = vcspec->rights & SMBM_MASK; 404 vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE); 405 vcp->vc_tdesc = &smb_tran_nbtcp_desc; 406 407 if (uid == SMBM_ANY_OWNER) 408 uid = realuid; 409 if (gid == SMBM_ANY_GROUP) 410 gid = cred->cr_groups[0]; 411 vcp->vc_uid = uid; 412 vcp->vc_grp = gid; 413 414 smb_sl_init(&vcp->vc_stlock, "vcstlock"); 415 error = 0; 416 itry { 417 vcp->vc_paddr = dup_sockaddr(vcspec->sap, 1); 418 ierror(vcp->vc_paddr == NULL, ENOMEM); 419 420 vcp->vc_laddr = dup_sockaddr(vcspec->lap, 1); 421 ierror(vcp->vc_laddr == NULL, ENOMEM); 422 423 ierror((vcp->vc_pass = smb_strdup(vcspec->pass)) == NULL, ENOMEM); 424 425 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain : "NODOMAIN"); 426 ierror(vcp->vc_domain == NULL, ENOMEM); 427 428 ierror((vcp->vc_srvname = smb_strdup(vcspec->srvname)) == NULL, ENOMEM); 429 ierror((vcp->vc_username = smb_strdup(vcspec->username)) == NULL, ENOMEM); 430 431 ithrow(iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower)); 432 ithrow(iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper)); 433 if (vcspec->servercs[0]) { 434 ithrow(iconv_open(vcspec->servercs, vcspec->localcs, 435 &vcp->vc_toserver)); 436 ithrow(iconv_open(vcspec->localcs, vcspec->servercs, 437 &vcp->vc_tolocal)); 438 } 439 440 ithrow(smb_iod_create(vcp)); 441 *vcpp = vcp; 442 smb_co_addchild(&smb_vclist, VCTOCP(vcp)); 443 } icatch(error) { 444 smb_vc_put(vcp, scred); 445 } ifinally { 446 } iendtry; 447 return error; 448 } 449 450 static void 451 smb_vc_free(struct smb_connobj *cp) 452 { 453 struct smb_vc *vcp = CPTOVC(cp); 454 455 if (vcp->vc_iod) 456 smb_iod_destroy(vcp->vc_iod); 457 SMB_STRFREE(vcp->vc_username); 458 SMB_STRFREE(vcp->vc_srvname); 459 SMB_STRFREE(vcp->vc_pass); 460 SMB_STRFREE(vcp->vc_domain); 461 if (vcp->vc_paddr) 462 free(vcp->vc_paddr, M_SONAME); 463 if (vcp->vc_laddr) 464 free(vcp->vc_laddr, M_SONAME); 465 if (vcp->vc_tolower) 466 iconv_close(vcp->vc_tolower); 467 if (vcp->vc_toupper) 468 iconv_close(vcp->vc_toupper); 469 if (vcp->vc_tolocal) 470 iconv_close(vcp->vc_tolocal); 471 if (vcp->vc_toserver) 472 iconv_close(vcp->vc_toserver); 473 smb_co_done(VCTOCP(vcp)); 474 smb_sl_destroy(&vcp->vc_stlock); 475 free(vcp, M_SMBCONN); 476 } 477 478 /* 479 * Called when use count of VC dropped to zero. 480 * VC should be locked on enter with LK_DRAIN. 481 */ 482 static void 483 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred) 484 { 485 struct smb_vc *vcp = CPTOVC(cp); 486 487 smb_vc_disconnect(vcp); 488 } 489 490 void 491 smb_vc_ref(struct smb_vc *vcp) 492 { 493 smb_co_ref(VCTOCP(vcp)); 494 } 495 496 void 497 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred) 498 { 499 smb_co_rele(VCTOCP(vcp), scred); 500 } 501 502 int 503 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred) 504 { 505 return smb_co_get(VCTOCP(vcp), flags, scred); 506 } 507 508 void 509 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred) 510 { 511 smb_co_put(VCTOCP(vcp), scred); 512 } 513 514 int 515 smb_vc_lock(struct smb_vc *vcp, int flags, struct thread *td) 516 { 517 return smb_co_lock(VCTOCP(vcp), flags, td); 518 } 519 520 void 521 smb_vc_unlock(struct smb_vc *vcp, int flags, struct thread *td) 522 { 523 smb_co_unlock(VCTOCP(vcp), flags, td); 524 } 525 526 int 527 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode) 528 { 529 struct ucred *cred = scred->scr_cred; 530 531 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid) 532 return 0; 533 mode >>= 3; 534 if (!groupmember(vcp->vc_grp, cred)) 535 mode >>= 3; 536 return (vcp->vc_mode & mode) == mode ? 0 : EACCES; 537 } 538 539 static int 540 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp) 541 { 542 int exact = 1; 543 544 if (strcmp(ssp->ss_name, dp->name) != 0) 545 return 1; 546 if (dp->owner != SMBM_ANY_OWNER) { 547 if (ssp->ss_uid != dp->owner) 548 return 1; 549 } else 550 exact = 0; 551 if (dp->group != SMBM_ANY_GROUP) { 552 if (ssp->ss_grp != dp->group) 553 return 1; 554 } else 555 exact = 0; 556 557 if (dp->mode & SMBM_EXACT) { 558 if (!exact) 559 return 1; 560 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1; 561 } 562 if (smb_share_access(ssp, dp->scred, dp->mode) != 0) 563 return 1; 564 return 0; 565 } 566 567 /* 568 * Lookup share in the given VC. Share referenced and locked on return. 569 * VC expected to be locked on entry and will be left locked on exit. 570 */ 571 int 572 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp, 573 struct smb_cred *scred, struct smb_share **sspp) 574 { 575 struct thread *td = scred->scr_td; 576 struct smb_share *ssp = NULL; 577 int error; 578 579 *sspp = NULL; 580 dp->scred = scred; 581 SMBCO_FOREACH((struct smb_connobj*)ssp, VCTOCP(vcp)) { 582 error = smb_share_lock(ssp, LK_EXCLUSIVE, td); 583 if (error) 584 continue; 585 if (smb_vc_cmpshare(ssp, dp) == 0) 586 break; 587 smb_share_unlock(ssp, 0, td); 588 } 589 if (ssp) { 590 smb_share_ref(ssp); 591 *sspp = ssp; 592 error = 0; 593 } else 594 error = ENOENT; 595 return error; 596 } 597 598 int 599 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 600 { 601 602 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 603 } 604 605 /* 606 * Destroy VC to server, invalidate shares linked with it. 607 * Transport should be locked on entry. 608 */ 609 int 610 smb_vc_disconnect(struct smb_vc *vcp) 611 { 612 613 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 614 return 0; 615 } 616 617 static char smb_emptypass[] = ""; 618 619 const char * 620 smb_vc_getpass(struct smb_vc *vcp) 621 { 622 if (vcp->vc_pass) 623 return vcp->vc_pass; 624 return smb_emptypass; 625 } 626 627 static int 628 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip) 629 { 630 bzero(vip, sizeof(struct smb_vc_info)); 631 vip->itype = SMB_INFO_VC; 632 vip->usecount = vcp->obj.co_usecount; 633 vip->uid = vcp->vc_uid; 634 vip->gid = vcp->vc_grp; 635 vip->mode = vcp->vc_mode; 636 vip->flags = vcp->obj.co_flags; 637 vip->sopt = vcp->vc_sopt; 638 vip->iodstate = vcp->vc_iod->iod_state; 639 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey)); 640 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname); 641 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username); 642 return 0; 643 } 644 645 u_short 646 smb_vc_nextmid(struct smb_vc *vcp) 647 { 648 u_short r; 649 650 SMB_CO_LOCK(&vcp->obj); 651 r = vcp->vc_mid++; 652 SMB_CO_UNLOCK(&vcp->obj); 653 return r; 654 } 655 656 /* 657 * Share implementation 658 */ 659 /* 660 * Allocate share structure and attach it to the given VC 661 * Connection expected to be locked on entry. Share will be returned 662 * in locked state. 663 */ 664 int 665 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 666 struct smb_cred *scred, struct smb_share **sspp) 667 { 668 struct smb_share *ssp; 669 struct thread *td = scred->scr_td; 670 struct ucred *cred = scred->scr_cred; 671 uid_t realuid = cred->cr_uid; 672 uid_t uid = shspec->owner; 673 gid_t gid = shspec->group; 674 int error, isroot; 675 676 isroot = smb_suser(cred) == 0; 677 /* 678 * Only superuser can create shares with different uid and gid 679 */ 680 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 681 return EPERM; 682 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 683 return EPERM; 684 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp); 685 if (!error) { 686 smb_share_put(ssp, scred); 687 return EEXIST; 688 } 689 if (uid == SMBM_ANY_OWNER) 690 uid = realuid; 691 if (gid == SMBM_ANY_GROUP) 692 gid = cred->cr_groups[0]; 693 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK); 694 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss", td); 695 ssp->obj.co_free = smb_share_free; 696 ssp->obj.co_gone = smb_share_gone; 697 smb_sl_init(&ssp->ss_stlock, "ssstlock"); 698 ssp->ss_name = smb_strdup(shspec->name); 699 if (shspec->pass && shspec->pass[0]) 700 ssp->ss_pass = smb_strdup(shspec->pass); 701 ssp->ss_type = shspec->stype; 702 ssp->ss_tid = SMB_TID_UNKNOWN; 703 ssp->ss_uid = uid; 704 ssp->ss_grp = gid; 705 ssp->ss_mode = shspec->rights & SMBM_MASK; 706 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp)); 707 *sspp = ssp; 708 return 0; 709 } 710 711 static void 712 smb_share_free(struct smb_connobj *cp) 713 { 714 struct smb_share *ssp = CPTOSS(cp); 715 716 SMB_STRFREE(ssp->ss_name); 717 SMB_STRFREE(ssp->ss_pass); 718 smb_sl_destroy(&ssp->ss_stlock); 719 smb_co_done(SSTOCP(ssp)); 720 free(ssp, M_SMBCONN); 721 } 722 723 static void 724 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred) 725 { 726 struct smb_share *ssp = CPTOSS(cp); 727 728 smb_smb_treedisconnect(ssp, scred); 729 } 730 731 void 732 smb_share_ref(struct smb_share *ssp) 733 { 734 smb_co_ref(SSTOCP(ssp)); 735 } 736 737 void 738 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred) 739 { 740 smb_co_rele(SSTOCP(ssp), scred); 741 } 742 743 int 744 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred) 745 { 746 return smb_co_get(SSTOCP(ssp), flags, scred); 747 } 748 749 void 750 smb_share_put(struct smb_share *ssp, struct smb_cred *scred) 751 { 752 smb_co_put(SSTOCP(ssp), scred); 753 } 754 755 int 756 smb_share_lock(struct smb_share *ssp, int flags, struct thread *td) 757 { 758 return smb_co_lock(SSTOCP(ssp), flags, td); 759 } 760 761 void 762 smb_share_unlock(struct smb_share *ssp, int flags, struct thread *td) 763 { 764 smb_co_unlock(SSTOCP(ssp), flags, td); 765 } 766 767 int 768 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode) 769 { 770 struct ucred *cred = scred->scr_cred; 771 772 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid) 773 return 0; 774 mode >>= 3; 775 if (!groupmember(ssp->ss_grp, cred)) 776 mode >>= 3; 777 return (ssp->ss_mode & mode) == mode ? 0 : EACCES; 778 } 779 780 void 781 smb_share_invalidate(struct smb_share *ssp) 782 { 783 ssp->ss_tid = SMB_TID_UNKNOWN; 784 } 785 786 int 787 smb_share_valid(struct smb_share *ssp) 788 { 789 return ssp->ss_tid != SMB_TID_UNKNOWN && 790 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid; 791 } 792 793 const char* 794 smb_share_getpass(struct smb_share *ssp) 795 { 796 struct smb_vc *vcp; 797 798 if (ssp->ss_pass) 799 return ssp->ss_pass; 800 vcp = SSTOVC(ssp); 801 if (vcp->vc_pass) 802 return vcp->vc_pass; 803 return smb_emptypass; 804 } 805 806 static int 807 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip) 808 { 809 bzero(sip, sizeof(struct smb_share_info)); 810 sip->itype = SMB_INFO_SHARE; 811 sip->usecount = ssp->obj.co_usecount; 812 sip->tid = ssp->ss_tid; 813 sip->type= ssp->ss_type; 814 sip->uid = ssp->ss_uid; 815 sip->gid = ssp->ss_grp; 816 sip->mode= ssp->ss_mode; 817 sip->flags = ssp->obj.co_flags; 818 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name); 819 return 0; 820 } 821 822 /* 823 * Dump an entire tree into sysctl call 824 */ 825 static int 826 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS) 827 { 828 struct thread *td = req->td; 829 struct smb_cred scred; 830 struct smb_vc *vcp; 831 struct smb_share *ssp; 832 struct smb_vc_info vci; 833 struct smb_share_info ssi; 834 int error, itype; 835 836 smb_makescred(&scred, td, td->td_ucred); 837 sysctl_wire_old_buffer(req, 0); 838 error = smb_sm_lockvclist(LK_SHARED, td); 839 if (error) 840 return error; 841 SMBCO_FOREACH((struct smb_connobj*)vcp, &smb_vclist) { 842 error = smb_vc_lock(vcp, LK_SHARED, td); 843 if (error) 844 continue; 845 smb_vc_getinfo(vcp, &vci); 846 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info)); 847 if (error) { 848 smb_vc_unlock(vcp, 0, td); 849 break; 850 } 851 SMBCO_FOREACH((struct smb_connobj*)ssp, VCTOCP(vcp)) { 852 error = smb_share_lock(ssp, LK_SHARED, td); 853 if (error) { 854 error = 0; 855 continue; 856 } 857 smb_share_getinfo(ssp, &ssi); 858 smb_share_unlock(ssp, 0, td); 859 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info)); 860 if (error) 861 break; 862 } 863 smb_vc_unlock(vcp, 0, td); 864 if (error) 865 break; 866 } 867 if (!error) { 868 itype = SMB_INFO_NONE; 869 error = SYSCTL_OUT(req, &itype, sizeof(itype)); 870 } 871 smb_sm_unlockvclist(td); 872 return error; 873 }
Cache object: 29c6e572de6cc0c6610f347118a613f6
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