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: src/sys/netsmb/smb_conn.c,v 1.1.2.1 2001/05/22 08:32:33 bp Exp $ 33 * $DragonFly: src/sys/netproto/smb/smb_conn.c,v 1.5 2003/08/07 21:17:38 dillon Exp $ 34 */ 35 36 /* 37 * Connection engine. 38 */ 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 "smb.h" 52 #include "smb_subr.h" 53 #include "smb_conn.h" 54 #include "smb_tran.h" 55 #include "smb_trantcp.h" 56 57 static struct smb_connobj smb_vclist; 58 static int smb_vcnext = 1; /* next unique id for VC */ 59 60 extern struct linker_set sysctl_net_smb; 61 62 SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol"); 63 64 MALLOC_DEFINE(M_SMBCONN, "SMB conn", "SMB connection"); 65 66 static void smb_co_init(struct smb_connobj *cp, int level, char *objname, 67 struct thread *td); 68 static void smb_co_done(struct smb_connobj *cp); 69 static int smb_co_lockstatus(struct smb_connobj *cp, struct thread *td); 70 71 static int smb_vc_disconnect(struct smb_vc *vcp); 72 static void smb_vc_free(struct smb_connobj *cp); 73 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred); 74 static smb_co_free_t smb_share_free; 75 static smb_co_gone_t smb_share_gone; 76 77 static int smb_sysctl_treedump(SYSCTL_HANDLER_ARGS); 78 79 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE, 80 NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree"); 81 82 int 83 smb_sm_init(void) 84 { 85 86 smb_co_init(&smb_vclist, SMBL_SM, "smbsm", curthread); 87 smb_co_unlock(&smb_vclist, 0, curthread); 88 return 0; 89 } 90 91 int 92 smb_sm_done(void) 93 { 94 95 /* XXX: hold the mutex */ 96 if (smb_vclist.co_usecount > 1) { 97 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1); 98 return EBUSY; 99 } 100 smb_co_done(&smb_vclist); 101 return 0; 102 } 103 104 static int 105 smb_sm_lockvclist(int flags, struct thread *td) 106 { 107 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE, td); 108 } 109 110 static void 111 smb_sm_unlockvclist(struct thread *td) 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 itry { 132 if ((vcp->obj.co_flags & SMBV_PRIVATE) || 133 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) || 134 strcmp(vcp->vc_username, vcspec->username) != 0) 135 ithrow(1); 136 if (vcspec->owner != SMBM_ANY_OWNER) { 137 if (vcp->vc_uid != vcspec->owner) 138 ithrow(1); 139 } else 140 exact = 0; 141 if (vcspec->group != SMBM_ANY_GROUP) { 142 if (vcp->vc_grp != vcspec->group) 143 ithrow(1); 144 } else 145 exact = 0; 146 147 if (vcspec->mode & SMBM_EXACT) { 148 if (!exact || 149 (vcspec->mode & SMBM_MASK) != vcp->vc_mode) 150 ithrow(1); 151 } 152 if (smb_vc_access(vcp, scred, vcspec->mode) != 0) 153 ithrow(1); 154 vcspec->ssp = NULL; 155 if (shspec) 156 ithrow(smb_vc_lookupshare(vcp, shspec, scred, &vcspec->ssp)); 157 error = 0; 158 break; 159 } icatch(error) { 160 smb_vc_unlock(vcp, 0, td); 161 } ifinally { 162 } iendtry; 163 if (error == 0) 164 break; 165 } 166 if (vcp) { 167 smb_vc_ref(vcp, td); 168 *vcpp = vcp; 169 } 170 return error; 171 } 172 173 int 174 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 175 struct smb_cred *scred, struct smb_vc **vcpp) 176 { 177 struct thread *td = scred->scr_td; 178 struct smb_vc *vcp; 179 struct smb_share *ssp = NULL; 180 int error; 181 182 *vcpp = vcp = NULL; 183 184 error = smb_sm_lockvclist(LK_EXCLUSIVE, td); 185 if (error) 186 return error; 187 error = smb_sm_lookupint(vcspec, shspec, scred, vcpp); 188 if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) { 189 smb_sm_unlockvclist(td); 190 return error; 191 } 192 error = smb_sm_lookupint(vcspec, NULL, scred, &vcp); 193 if (error) { 194 error = smb_vc_create(vcspec, scred, &vcp); 195 if (error) 196 goto out; 197 error = smb_vc_connect(vcp, scred); 198 if (error) 199 goto out; 200 } 201 if (shspec == NULL) 202 goto out; 203 error = smb_share_create(vcp, shspec, scred, &ssp); 204 if (error) 205 goto out; 206 error = smb_smb_treeconnect(ssp, scred); 207 if (error == 0) 208 vcspec->ssp = ssp; 209 else 210 smb_share_put(ssp, scred); 211 out: 212 smb_sm_unlockvclist(td); 213 if (error == 0) 214 *vcpp = vcp; 215 else if (vcp) 216 smb_vc_put(vcp, scred); 217 return error; 218 } 219 220 /* 221 * Common code for connection object 222 */ 223 static void 224 smb_co_init(struct smb_connobj *cp, int level, char *objname, struct thread *td) 225 { 226 SLIST_INIT(&cp->co_children); 227 smb_sl_init(&cp->co_interlock, objname); 228 lockinit(&cp->co_lock, 0, objname, 0, 0); 229 cp->co_level = level; 230 cp->co_usecount = 1; 231 KASSERT(smb_co_lock(cp, LK_EXCLUSIVE, td) == 0, 232 ("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, struct thread *td) 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, curthread); 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 = 0; 418 itry { 419 vcp->vc_paddr = dup_sockaddr(vcspec->sap, 1); 420 ierror(vcp->vc_paddr == NULL, ENOMEM); 421 422 vcp->vc_laddr = dup_sockaddr(vcspec->lap, 1); 423 ierror(vcp->vc_laddr == NULL, ENOMEM); 424 425 ierror((vcp->vc_pass = smb_strdup(vcspec->pass)) == NULL, ENOMEM); 426 427 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain : "NODOMAIN"); 428 ierror(vcp->vc_domain == NULL, ENOMEM); 429 430 ierror((vcp->vc_srvname = smb_strdup(vcspec->srvname)) == NULL, ENOMEM); 431 ierror((vcp->vc_username = smb_strdup(vcspec->username)) == NULL, ENOMEM); 432 433 ithrow(iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower)); 434 ithrow(iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper)); 435 if (vcspec->servercs[0]) { 436 ithrow(iconv_open(vcspec->servercs, vcspec->localcs, 437 &vcp->vc_toserver)); 438 ithrow(iconv_open(vcspec->localcs, vcspec->servercs, 439 &vcp->vc_tolocal)); 440 } 441 442 ithrow(smb_iod_create(vcp)); 443 *vcpp = vcp; 444 smb_co_addchild(&smb_vclist, VCTOCP(vcp)); 445 } icatch(error) { 446 smb_vc_put(vcp, scred); 447 } ifinally { 448 } iendtry; 449 return error; 450 } 451 452 static void 453 smb_vc_free(struct smb_connobj *cp) 454 { 455 struct smb_vc *vcp = CPTOVC(cp); 456 457 if (vcp->vc_iod) 458 smb_iod_destroy(vcp->vc_iod); 459 SMB_STRFREE(vcp->vc_username); 460 SMB_STRFREE(vcp->vc_srvname); 461 SMB_STRFREE(vcp->vc_pass); 462 SMB_STRFREE(vcp->vc_domain); 463 if (vcp->vc_paddr) 464 free(vcp->vc_paddr, M_SONAME); 465 if (vcp->vc_laddr) 466 free(vcp->vc_laddr, M_SONAME); 467 if (vcp->vc_tolower) 468 iconv_close(vcp->vc_tolower); 469 if (vcp->vc_toupper) 470 iconv_close(vcp->vc_toupper); 471 if (vcp->vc_tolocal) 472 iconv_close(vcp->vc_tolocal); 473 if (vcp->vc_toserver) 474 iconv_close(vcp->vc_toserver); 475 smb_co_done(VCTOCP(vcp)); 476 smb_sl_destroy(&vcp->vc_stlock); 477 free(vcp, M_SMBCONN); 478 } 479 480 /* 481 * Called when use count of VC dropped to zero. 482 * VC should be locked on enter with LK_DRAIN. 483 */ 484 static void 485 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred) 486 { 487 struct smb_vc *vcp = CPTOVC(cp); 488 489 smb_vc_disconnect(vcp); 490 } 491 492 void 493 smb_vc_ref(struct smb_vc *vcp, struct thread *td) 494 { 495 smb_co_ref(VCTOCP(vcp), td); 496 } 497 498 void 499 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred) 500 { 501 smb_co_rele(VCTOCP(vcp), scred); 502 } 503 504 int 505 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred) 506 { 507 return smb_co_get(VCTOCP(vcp), flags, scred); 508 } 509 510 void 511 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred) 512 { 513 smb_co_put(VCTOCP(vcp), scred); 514 } 515 516 int 517 smb_vc_lock(struct smb_vc *vcp, int flags, struct thread *td) 518 { 519 return smb_co_lock(VCTOCP(vcp), flags, td); 520 } 521 522 void 523 smb_vc_unlock(struct smb_vc *vcp, int flags, struct thread *td) 524 { 525 smb_co_unlock(VCTOCP(vcp), flags, td); 526 } 527 528 int 529 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode) 530 { 531 struct ucred *cred = scred->scr_cred; 532 533 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid) 534 return 0; 535 mode >>= 3; 536 if (!groupmember(vcp->vc_grp, cred)) 537 mode >>= 3; 538 return (vcp->vc_mode & mode) == mode ? 0 : EACCES; 539 } 540 541 static int 542 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp) 543 { 544 int exact = 1; 545 546 if (strcmp(ssp->ss_name, dp->name) != 0) 547 return 1; 548 if (dp->owner != SMBM_ANY_OWNER) { 549 if (ssp->ss_uid != dp->owner) 550 return 1; 551 } else 552 exact = 0; 553 if (dp->group != SMBM_ANY_GROUP) { 554 if (ssp->ss_grp != dp->group) 555 return 1; 556 } else 557 exact = 0; 558 559 if (dp->mode & SMBM_EXACT) { 560 if (!exact) 561 return 1; 562 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1; 563 } 564 if (smb_share_access(ssp, dp->scred, dp->mode) != 0) 565 return 1; 566 return 0; 567 } 568 569 /* 570 * Lookup share in the given VC. Share referenced and locked on return. 571 * VC expected to be locked on entry and will be left locked on exit. 572 */ 573 int 574 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp, 575 struct smb_cred *scred, struct smb_share **sspp) 576 { 577 struct thread *td = scred->scr_td; 578 struct smb_share *ssp = NULL; 579 int error; 580 581 *sspp = NULL; 582 dp->scred = scred; 583 SMBCO_FOREACH((struct smb_connobj*)ssp, VCTOCP(vcp)) { 584 error = smb_share_lock(ssp, LK_EXCLUSIVE, td); 585 if (error) 586 continue; 587 if (smb_vc_cmpshare(ssp, dp) == 0) 588 break; 589 smb_share_unlock(ssp, 0, td); 590 } 591 if (ssp) { 592 smb_share_ref(ssp, td); 593 *sspp = ssp; 594 error = 0; 595 } else 596 error = ENOENT; 597 return error; 598 } 599 600 int 601 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 602 { 603 604 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 605 } 606 607 /* 608 * Destroy VC to server, invalidate shares linked with it. 609 * Transport should be locked on entry. 610 */ 611 int 612 smb_vc_disconnect(struct smb_vc *vcp) 613 { 614 615 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 616 return 0; 617 } 618 619 static char smb_emptypass[] = ""; 620 621 const char * 622 smb_vc_getpass(struct smb_vc *vcp) 623 { 624 if (vcp->vc_pass) 625 return vcp->vc_pass; 626 return smb_emptypass; 627 } 628 629 static int 630 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip) 631 { 632 bzero(vip, sizeof(struct smb_vc_info)); 633 vip->itype = SMB_INFO_VC; 634 vip->usecount = vcp->obj.co_usecount; 635 vip->uid = vcp->vc_uid; 636 vip->gid = vcp->vc_grp; 637 vip->mode = vcp->vc_mode; 638 vip->flags = vcp->obj.co_flags; 639 vip->sopt = vcp->vc_sopt; 640 vip->iodstate = vcp->vc_iod->iod_state; 641 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey)); 642 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname); 643 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username); 644 return 0; 645 } 646 647 u_short 648 smb_vc_nextmid(struct smb_vc *vcp) 649 { 650 u_short r; 651 652 SMB_CO_LOCK(&vcp->obj); 653 r = vcp->vc_mid++; 654 SMB_CO_UNLOCK(&vcp->obj); 655 return r; 656 } 657 658 /* 659 * Share implementation 660 */ 661 /* 662 * Allocate share structure and attach it to the given VC 663 * Connection expected to be locked on entry. Share will be returned 664 * in locked state. 665 */ 666 int 667 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 668 struct smb_cred *scred, struct smb_share **sspp) 669 { 670 struct smb_share *ssp; 671 struct thread *td = scred->scr_td; 672 struct ucred *cred = scred->scr_cred; 673 uid_t realuid = cred->cr_uid; 674 uid_t uid = shspec->owner; 675 gid_t gid = shspec->group; 676 int error, isroot; 677 678 isroot = smb_suser(cred) == 0; 679 /* 680 * Only superuser can create shares with different uid and gid 681 */ 682 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 683 return EPERM; 684 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 685 return EPERM; 686 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp); 687 if (!error) { 688 smb_share_put(ssp, scred); 689 return EEXIST; 690 } 691 if (uid == SMBM_ANY_OWNER) 692 uid = realuid; 693 if (gid == SMBM_ANY_GROUP) 694 gid = cred->cr_groups[0]; 695 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK); 696 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss", td); 697 ssp->obj.co_free = smb_share_free; 698 ssp->obj.co_gone = smb_share_gone; 699 smb_sl_init(&ssp->ss_stlock, "ssstlock"); 700 ssp->ss_name = smb_strdup(shspec->name); 701 if (shspec->pass && shspec->pass[0]) 702 ssp->ss_pass = smb_strdup(shspec->pass); 703 ssp->ss_type = shspec->stype; 704 ssp->ss_tid = SMB_TID_UNKNOWN; 705 ssp->ss_uid = uid; 706 ssp->ss_grp = gid; 707 ssp->ss_mode = shspec->rights & SMBM_MASK; 708 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp)); 709 *sspp = ssp; 710 return 0; 711 } 712 713 static void 714 smb_share_free(struct smb_connobj *cp) 715 { 716 struct smb_share *ssp = CPTOSS(cp); 717 718 SMB_STRFREE(ssp->ss_name); 719 SMB_STRFREE(ssp->ss_pass); 720 smb_sl_destroy(&ssp->ss_stlock); 721 smb_co_done(SSTOCP(ssp)); 722 free(ssp, M_SMBCONN); 723 } 724 725 static void 726 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred) 727 { 728 struct smb_share *ssp = CPTOSS(cp); 729 730 smb_smb_treedisconnect(ssp, scred); 731 } 732 733 void 734 smb_share_ref(struct smb_share *ssp, struct thread *td) 735 { 736 smb_co_ref(SSTOCP(ssp), td); 737 } 738 739 void 740 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred) 741 { 742 smb_co_rele(SSTOCP(ssp), scred); 743 } 744 745 int 746 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred) 747 { 748 return smb_co_get(SSTOCP(ssp), flags, scred); 749 } 750 751 void 752 smb_share_put(struct smb_share *ssp, struct smb_cred *scred) 753 { 754 smb_co_put(SSTOCP(ssp), scred); 755 } 756 757 int 758 smb_share_lock(struct smb_share *ssp, int flags, struct thread *td) 759 { 760 return smb_co_lock(SSTOCP(ssp), flags, td); 761 } 762 763 void 764 smb_share_unlock(struct smb_share *ssp, int flags, struct thread *td) 765 { 766 smb_co_unlock(SSTOCP(ssp), flags, td); 767 } 768 769 int 770 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode) 771 { 772 struct ucred *cred = scred->scr_cred; 773 774 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid) 775 return 0; 776 mode >>= 3; 777 if (!groupmember(ssp->ss_grp, cred)) 778 mode >>= 3; 779 return (ssp->ss_mode & mode) == mode ? 0 : EACCES; 780 } 781 782 void 783 smb_share_invalidate(struct smb_share *ssp) 784 { 785 ssp->ss_tid = SMB_TID_UNKNOWN; 786 } 787 788 int 789 smb_share_valid(struct smb_share *ssp) 790 { 791 return ssp->ss_tid != SMB_TID_UNKNOWN && 792 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid; 793 } 794 795 const char* 796 smb_share_getpass(struct smb_share *ssp) 797 { 798 struct smb_vc *vcp; 799 800 if (ssp->ss_pass) 801 return ssp->ss_pass; 802 vcp = SSTOVC(ssp); 803 if (vcp->vc_pass) 804 return vcp->vc_pass; 805 return smb_emptypass; 806 } 807 808 static int 809 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip) 810 { 811 bzero(sip, sizeof(struct smb_share_info)); 812 sip->itype = SMB_INFO_SHARE; 813 sip->usecount = ssp->obj.co_usecount; 814 sip->tid = ssp->ss_tid; 815 sip->type= ssp->ss_type; 816 sip->uid = ssp->ss_uid; 817 sip->gid = ssp->ss_grp; 818 sip->mode= ssp->ss_mode; 819 sip->flags = ssp->obj.co_flags; 820 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name); 821 return 0; 822 } 823 824 /* 825 * Dump an entire tree into sysctl call 826 */ 827 static int 828 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS) 829 { 830 struct thread *td = req->td; 831 struct ucred *ucred; 832 struct smb_cred scred; 833 struct smb_vc *vcp; 834 struct smb_share *ssp; 835 struct smb_vc_info vci; 836 struct smb_share_info ssi; 837 int error, itype; 838 839 KKASSERT(td->td_proc); 840 ucred = td->td_proc->p_ucred; 841 842 smb_makescred(&scred, td, ucred); 843 error = smb_sm_lockvclist(LK_SHARED, td); 844 if (error) 845 return error; 846 SMBCO_FOREACH((struct smb_connobj*)vcp, &smb_vclist) { 847 error = smb_vc_lock(vcp, LK_SHARED, td); 848 if (error) 849 continue; 850 smb_vc_getinfo(vcp, &vci); 851 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info)); 852 if (error) { 853 smb_vc_unlock(vcp, 0, td); 854 break; 855 } 856 SMBCO_FOREACH((struct smb_connobj*)ssp, VCTOCP(vcp)) { 857 error = smb_share_lock(ssp, LK_SHARED, td); 858 if (error) { 859 error = 0; 860 continue; 861 } 862 smb_share_getinfo(ssp, &ssi); 863 smb_share_unlock(ssp, 0, td); 864 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info)); 865 if (error) 866 break; 867 } 868 smb_vc_unlock(vcp, 0, td); 869 if (error) 870 break; 871 } 872 if (!error) { 873 itype = SMB_INFO_NONE; 874 error = SYSCTL_OUT(req, &itype, sizeof(itype)); 875 } 876 smb_sm_unlockvclist(td); 877 return error; 878 } 879