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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * Connection engine. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/priv.h> 39 #include <sys/proc.h> 40 #include <sys/lock.h> 41 #include <sys/sysctl.h> 42 #include <sys/socketvar.h> 43 44 #include <sys/iconv.h> 45 46 #include <netsmb/smb.h> 47 #include <netsmb/smb_subr.h> 48 #include <netsmb/smb_conn.h> 49 #include <netsmb/smb_tran.h> 50 #include <netsmb/smb_trantcp.h> 51 52 static struct smb_connobj smb_vclist; 53 static int smb_vcnext = 1; /* next unique id for VC */ 54 55 SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol"); 56 57 MALLOC_DEFINE(M_SMBCONN, "smb_conn", "SMB connection"); 58 59 static void smb_co_init(struct smb_connobj *cp, int level, char *ilockname, 60 char *lockname); 61 static void smb_co_done(struct smb_connobj *cp); 62 static int smb_co_lockstatus(struct smb_connobj *cp); 63 64 static int smb_vc_disconnect(struct smb_vc *vcp); 65 static void smb_vc_free(struct smb_connobj *cp); 66 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred); 67 static smb_co_free_t smb_share_free; 68 static smb_co_gone_t smb_share_gone; 69 70 static int smb_sysctl_treedump(SYSCTL_HANDLER_ARGS); 71 72 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE, 73 NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree"); 74 75 int 76 smb_sm_init(void) 77 { 78 79 smb_co_init(&smb_vclist, SMBL_SM, "smbsm ilock", "smbsm"); 80 smb_co_unlock(&smb_vclist, 0); 81 return 0; 82 } 83 84 int 85 smb_sm_done(void) 86 { 87 88 /* XXX: hold the mutex */ 89 if (smb_vclist.co_usecount > 1) { 90 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1); 91 return EBUSY; 92 } 93 lockmgr(&smb_vclist.co_lock, LK_DRAIN, NULL); 94 smb_co_done(&smb_vclist); 95 return 0; 96 } 97 98 static int 99 smb_sm_lockvclist(int flags) 100 { 101 102 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE); 103 } 104 105 static void 106 smb_sm_unlockvclist(void) 107 { 108 109 smb_co_unlock(&smb_vclist, LK_RELEASE); 110 } 111 112 static int 113 smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 114 struct smb_cred *scred, struct smb_vc **vcpp) 115 { 116 struct smb_connobj *scp; 117 struct smb_vc *vcp; 118 int exact = 1; 119 int error; 120 121 vcspec->shspec = shspec; 122 error = ENOENT; 123 vcp = NULL; 124 SMBCO_FOREACH(scp, &smb_vclist) { 125 vcp = (struct smb_vc *)scp; 126 error = smb_vc_lock(vcp, LK_EXCLUSIVE); 127 if (error) 128 continue; 129 130 if ((vcp->obj.co_flags & SMBV_PRIVATE) || 131 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) || 132 strcmp(vcp->vc_username, vcspec->username) != 0) 133 goto err1; 134 if (vcspec->owner != SMBM_ANY_OWNER) { 135 if (vcp->vc_uid != vcspec->owner) 136 goto err1; 137 } else 138 exact = 0; 139 if (vcspec->group != SMBM_ANY_GROUP) { 140 if (vcp->vc_grp != vcspec->group) 141 goto err1; 142 } else 143 exact = 0; 144 if (vcspec->mode & SMBM_EXACT) { 145 if (!exact || (vcspec->mode & SMBM_MASK) != 146 vcp->vc_mode) 147 goto err1; 148 } 149 if (smb_vc_access(vcp, scred, vcspec->mode) != 0) 150 goto err1; 151 vcspec->ssp = NULL; 152 if (shspec) { 153 error = (int)smb_vc_lookupshare(vcp, shspec, scred, 154 &vcspec->ssp); 155 if (error) 156 goto fail; 157 } 158 error = 0; 159 break; 160 err1: 161 error = 1; 162 fail: 163 smb_vc_unlock(vcp, 0); 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 smb_vc *vcp; 177 struct smb_share *ssp = NULL; 178 int error; 179 180 *vcpp = vcp = NULL; 181 182 error = smb_sm_lockvclist(LK_EXCLUSIVE); 183 if (error) 184 return error; 185 error = smb_sm_lookupint(vcspec, shspec, scred, vcpp); 186 if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) { 187 smb_sm_unlockvclist(); 188 return error; 189 } 190 error = smb_sm_lookupint(vcspec, NULL, scred, &vcp); 191 if (error) { 192 error = smb_vc_create(vcspec, scred, &vcp); 193 if (error) 194 goto out; 195 error = smb_vc_connect(vcp, scred); 196 if (error) 197 goto out; 198 } 199 if (shspec == NULL) 200 goto out; 201 error = smb_share_create(vcp, shspec, scred, &ssp); 202 if (error) 203 goto out; 204 error = smb_smb_treeconnect(ssp, scred); 205 if (error == 0) 206 vcspec->ssp = ssp; 207 else 208 smb_share_put(ssp, scred); 209 out: 210 smb_sm_unlockvclist(); 211 if (error == 0) 212 *vcpp = vcp; 213 else if (vcp) { 214 smb_vc_lock(vcp, LK_EXCLUSIVE); 215 smb_vc_put(vcp, scred); 216 } 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 *ilockname, char *lockname) 225 { 226 SLIST_INIT(&cp->co_children); 227 smb_sl_init(&cp->co_interlock, ilockname); 228 lockinit(&cp->co_lock, PZERO, lockname, 0, 0); 229 cp->co_level = level; 230 cp->co_usecount = 1; 231 if (smb_co_lock(cp, LK_EXCLUSIVE) != 0) 232 panic("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 lockmgr(&cp->co_lock, LK_RELEASE, NULL); 240 lockdestroy(&cp->co_lock); 241 } 242 243 static void 244 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred) 245 { 246 struct smb_connobj *parent; 247 248 if (cp->co_gone) 249 cp->co_gone(cp, scred); 250 parent = cp->co_parent; 251 if (parent) { 252 smb_co_lock(parent, LK_EXCLUSIVE); 253 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next); 254 smb_co_put(parent, scred); 255 } 256 if (cp->co_free) 257 cp->co_free(cp); 258 } 259 260 void 261 smb_co_ref(struct smb_connobj *cp) 262 { 263 264 SMB_CO_LOCK(cp); 265 cp->co_usecount++; 266 SMB_CO_UNLOCK(cp); 267 } 268 269 void 270 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred) 271 { 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); 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); 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 { 312 313 SMB_CO_LOCK(cp); 314 if (cp->co_usecount > 1) { 315 cp->co_usecount--; 316 } else if (cp->co_usecount == 1) { 317 cp->co_usecount--; 318 cp->co_flags |= SMBO_GONE; 319 } else { 320 SMBERROR("negative usecount"); 321 } 322 lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock); 323 if ((cp->co_flags & SMBO_GONE) == 0) 324 return; 325 lockmgr(&cp->co_lock, LK_DRAIN, NULL); 326 smb_co_gone(cp, scred); 327 } 328 329 int 330 smb_co_lockstatus(struct smb_connobj *cp) 331 { 332 return lockstatus(&cp->co_lock); 333 } 334 335 int 336 smb_co_lock(struct smb_connobj *cp, int flags) 337 { 338 339 if (cp->co_flags & SMBO_GONE) 340 return EINVAL; 341 if ((flags & LK_TYPE_MASK) == 0) 342 flags |= LK_EXCLUSIVE; 343 if (smb_co_lockstatus(cp) == LK_EXCLUSIVE && 344 (flags & LK_CANRECURSE) == 0) { 345 SMBERROR("recursive lock for object %d\n", cp->co_level); 346 return 0; 347 } 348 return lockmgr(&cp->co_lock, flags, &cp->co_interlock); 349 } 350 351 void 352 smb_co_unlock(struct smb_connobj *cp, int flags) 353 { 354 (void)lockmgr(&cp->co_lock, flags | LK_RELEASE, &cp->co_interlock); 355 } 356 357 static void 358 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child) 359 { 360 361 KASSERT(smb_co_lockstatus(parent) == LK_EXCLUSIVE, 362 ("smb_co_addchild: parent not locked")); 363 KASSERT(smb_co_lockstatus(child) == LK_EXCLUSIVE, 364 ("smb_co_addchild: child not locked")); 365 366 smb_co_ref(parent); 367 SLIST_INSERT_HEAD(&parent->co_children, child, co_next); 368 child->co_parent = parent; 369 } 370 371 /* 372 * Session implementation 373 */ 374 375 int 376 smb_vc_create(struct smb_vcspec *vcspec, 377 struct smb_cred *scred, struct smb_vc **vcpp) 378 { 379 struct smb_vc *vcp; 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 ilock", "smb_vc"); 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 vcp->vc_seqno = 0; 407 vcp->vc_mackey = NULL; 408 vcp->vc_mackeylen = 0; 409 410 if (uid == SMBM_ANY_OWNER) 411 uid = realuid; 412 if (gid == SMBM_ANY_GROUP) 413 gid = cred->cr_groups[0]; 414 vcp->vc_uid = uid; 415 vcp->vc_grp = gid; 416 417 smb_sl_init(&vcp->vc_stlock, "vcstlock"); 418 error = ENOMEM; 419 420 vcp->vc_paddr = sodupsockaddr(vcspec->sap, M_WAITOK); 421 if (vcp->vc_paddr == NULL) 422 goto fail; 423 vcp->vc_laddr = sodupsockaddr(vcspec->lap, M_WAITOK); 424 if (vcp->vc_laddr == NULL) 425 goto fail; 426 vcp->vc_pass = smb_strdup(vcspec->pass); 427 if (vcp->vc_pass == NULL) 428 goto fail; 429 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain : 430 "NODOMAIN"); 431 if (vcp->vc_domain == NULL) 432 goto fail; 433 vcp->vc_srvname = smb_strdup(vcspec->srvname); 434 if (vcp->vc_srvname == NULL) 435 goto fail; 436 vcp->vc_username = smb_strdup(vcspec->username); 437 if (vcp->vc_username == NULL) 438 goto fail; 439 error = (int)iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower); 440 if (error) 441 goto fail; 442 error = (int)iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper); 443 if (error) 444 goto fail; 445 if (vcspec->servercs[0]) { 446 error = (int)iconv_open(vcspec->servercs, vcspec->localcs, 447 &vcp->vc_toserver); 448 if (error) 449 goto fail; 450 error = (int)iconv_open(vcspec->localcs, vcspec->servercs, 451 &vcp->vc_tolocal); 452 if (error) 453 goto fail; 454 } 455 error = (int)smb_iod_create(vcp); 456 if (error) 457 goto fail; 458 *vcpp = vcp; 459 smb_co_addchild(&smb_vclist, VCTOCP(vcp)); 460 return (0); 461 462 fail: 463 smb_vc_put(vcp, scred); 464 return (error); 465 } 466 467 static void 468 smb_vc_free(struct smb_connobj *cp) 469 { 470 struct smb_vc *vcp = CPTOVC(cp); 471 472 if (vcp->vc_iod) 473 smb_iod_destroy(vcp->vc_iod); 474 SMB_STRFREE(vcp->vc_username); 475 SMB_STRFREE(vcp->vc_srvname); 476 SMB_STRFREE(vcp->vc_pass); 477 SMB_STRFREE(vcp->vc_domain); 478 if (vcp->vc_mackey) 479 free(vcp->vc_mackey, M_SMBTEMP); 480 if (vcp->vc_paddr) 481 free(vcp->vc_paddr, M_SONAME); 482 if (vcp->vc_laddr) 483 free(vcp->vc_laddr, M_SONAME); 484 if (vcp->vc_tolower) 485 iconv_close(vcp->vc_tolower); 486 if (vcp->vc_toupper) 487 iconv_close(vcp->vc_toupper); 488 if (vcp->vc_tolocal) 489 iconv_close(vcp->vc_tolocal); 490 if (vcp->vc_toserver) 491 iconv_close(vcp->vc_toserver); 492 smb_co_done(VCTOCP(vcp)); 493 smb_sl_destroy(&vcp->vc_stlock); 494 free(vcp, M_SMBCONN); 495 } 496 497 /* 498 * Called when use count of VC dropped to zero. 499 * VC should be locked on enter with LK_DRAIN. 500 */ 501 static void 502 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred) 503 { 504 struct smb_vc *vcp = CPTOVC(cp); 505 506 smb_vc_disconnect(vcp); 507 } 508 509 void 510 smb_vc_ref(struct smb_vc *vcp) 511 { 512 smb_co_ref(VCTOCP(vcp)); 513 } 514 515 void 516 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred) 517 { 518 smb_co_rele(VCTOCP(vcp), scred); 519 } 520 521 int 522 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred) 523 { 524 return smb_co_get(VCTOCP(vcp), flags, scred); 525 } 526 527 void 528 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred) 529 { 530 smb_co_put(VCTOCP(vcp), scred); 531 } 532 533 int 534 smb_vc_lock(struct smb_vc *vcp, int flags) 535 { 536 return smb_co_lock(VCTOCP(vcp), flags); 537 } 538 539 void 540 smb_vc_unlock(struct smb_vc *vcp, int flags) 541 { 542 smb_co_unlock(VCTOCP(vcp), flags); 543 } 544 545 int 546 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode) 547 { 548 struct ucred *cred = scred->scr_cred; 549 550 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid) 551 return 0; 552 mode >>= 3; 553 if (!groupmember(vcp->vc_grp, cred)) 554 mode >>= 3; 555 return (vcp->vc_mode & mode) == mode ? 0 : EACCES; 556 } 557 558 static int 559 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp) 560 { 561 int exact = 1; 562 563 if (strcmp(ssp->ss_name, dp->name) != 0) 564 return 1; 565 if (dp->owner != SMBM_ANY_OWNER) { 566 if (ssp->ss_uid != dp->owner) 567 return 1; 568 } else 569 exact = 0; 570 if (dp->group != SMBM_ANY_GROUP) { 571 if (ssp->ss_grp != dp->group) 572 return 1; 573 } else 574 exact = 0; 575 576 if (dp->mode & SMBM_EXACT) { 577 if (!exact) 578 return 1; 579 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1; 580 } 581 if (smb_share_access(ssp, dp->scred, dp->mode) != 0) 582 return 1; 583 return 0; 584 } 585 586 /* 587 * Lookup share in the given VC. Share referenced and locked on return. 588 * VC expected to be locked on entry and will be left locked on exit. 589 */ 590 int 591 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp, 592 struct smb_cred *scred, struct smb_share **sspp) 593 { 594 struct smb_connobj *scp = NULL; 595 struct smb_share *ssp = NULL; 596 int error; 597 598 *sspp = NULL; 599 dp->scred = scred; 600 SMBCO_FOREACH(scp, VCTOCP(vcp)) { 601 ssp = (struct smb_share *)scp; 602 error = smb_share_lock(ssp, LK_EXCLUSIVE); 603 if (error) 604 continue; 605 if (smb_vc_cmpshare(ssp, dp) == 0) 606 break; 607 smb_share_unlock(ssp, 0); 608 } 609 if (ssp) { 610 smb_share_ref(ssp); 611 *sspp = ssp; 612 error = 0; 613 } else 614 error = ENOENT; 615 return error; 616 } 617 618 int 619 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 620 { 621 622 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 623 } 624 625 /* 626 * Destroy VC to server, invalidate shares linked with it. 627 * Transport should be locked on entry. 628 */ 629 int 630 smb_vc_disconnect(struct smb_vc *vcp) 631 { 632 633 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 634 return 0; 635 } 636 637 static char smb_emptypass[] = ""; 638 639 const char * 640 smb_vc_getpass(struct smb_vc *vcp) 641 { 642 if (vcp->vc_pass) 643 return vcp->vc_pass; 644 return smb_emptypass; 645 } 646 647 static int 648 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip) 649 { 650 bzero(vip, sizeof(struct smb_vc_info)); 651 vip->itype = SMB_INFO_VC; 652 vip->usecount = vcp->obj.co_usecount; 653 vip->uid = vcp->vc_uid; 654 vip->gid = vcp->vc_grp; 655 vip->mode = vcp->vc_mode; 656 vip->flags = vcp->obj.co_flags; 657 vip->sopt = vcp->vc_sopt; 658 vip->iodstate = vcp->vc_iod->iod_state; 659 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey)); 660 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname); 661 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username); 662 return 0; 663 } 664 665 u_short 666 smb_vc_nextmid(struct smb_vc *vcp) 667 { 668 u_short r; 669 670 SMB_CO_LOCK(&vcp->obj); 671 r = vcp->vc_mid++; 672 SMB_CO_UNLOCK(&vcp->obj); 673 return r; 674 } 675 676 /* 677 * Share implementation 678 */ 679 /* 680 * Allocate share structure and attach it to the given VC 681 * Connection expected to be locked on entry. Share will be returned 682 * in locked state. 683 */ 684 int 685 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 686 struct smb_cred *scred, struct smb_share **sspp) 687 { 688 struct smb_share *ssp; 689 struct ucred *cred = scred->scr_cred; 690 uid_t realuid = cred->cr_uid; 691 uid_t uid = shspec->owner; 692 gid_t gid = shspec->group; 693 int error, isroot; 694 695 isroot = smb_suser(cred) == 0; 696 /* 697 * Only superuser can create shares with different uid and gid 698 */ 699 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 700 return EPERM; 701 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 702 return EPERM; 703 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp); 704 if (!error) { 705 smb_share_put(ssp, scred); 706 return EEXIST; 707 } 708 if (uid == SMBM_ANY_OWNER) 709 uid = realuid; 710 if (gid == SMBM_ANY_GROUP) 711 gid = cred->cr_groups[0]; 712 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK); 713 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss ilock", "smbss"); 714 ssp->obj.co_free = smb_share_free; 715 ssp->obj.co_gone = smb_share_gone; 716 smb_sl_init(&ssp->ss_stlock, "ssstlock"); 717 ssp->ss_name = smb_strdup(shspec->name); 718 if (shspec->pass && shspec->pass[0]) 719 ssp->ss_pass = smb_strdup(shspec->pass); 720 ssp->ss_type = shspec->stype; 721 ssp->ss_tid = SMB_TID_UNKNOWN; 722 ssp->ss_uid = uid; 723 ssp->ss_grp = gid; 724 ssp->ss_mode = shspec->rights & SMBM_MASK; 725 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp)); 726 *sspp = ssp; 727 return 0; 728 } 729 730 static void 731 smb_share_free(struct smb_connobj *cp) 732 { 733 struct smb_share *ssp = CPTOSS(cp); 734 735 SMB_STRFREE(ssp->ss_name); 736 SMB_STRFREE(ssp->ss_pass); 737 smb_sl_destroy(&ssp->ss_stlock); 738 smb_co_done(SSTOCP(ssp)); 739 free(ssp, M_SMBCONN); 740 } 741 742 static void 743 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred) 744 { 745 struct smb_share *ssp = CPTOSS(cp); 746 747 smb_smb_treedisconnect(ssp, scred); 748 } 749 750 void 751 smb_share_ref(struct smb_share *ssp) 752 { 753 smb_co_ref(SSTOCP(ssp)); 754 } 755 756 void 757 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred) 758 { 759 smb_co_rele(SSTOCP(ssp), scred); 760 } 761 762 int 763 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred) 764 { 765 return smb_co_get(SSTOCP(ssp), flags, scred); 766 } 767 768 void 769 smb_share_put(struct smb_share *ssp, struct smb_cred *scred) 770 { 771 smb_co_put(SSTOCP(ssp), scred); 772 } 773 774 int 775 smb_share_lock(struct smb_share *ssp, int flags) 776 { 777 return smb_co_lock(SSTOCP(ssp), flags); 778 } 779 780 void 781 smb_share_unlock(struct smb_share *ssp, int flags) 782 { 783 smb_co_unlock(SSTOCP(ssp), flags); 784 } 785 786 int 787 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode) 788 { 789 struct ucred *cred = scred->scr_cred; 790 791 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid) 792 return 0; 793 mode >>= 3; 794 if (!groupmember(ssp->ss_grp, cred)) 795 mode >>= 3; 796 return (ssp->ss_mode & mode) == mode ? 0 : EACCES; 797 } 798 799 void 800 smb_share_invalidate(struct smb_share *ssp) 801 { 802 ssp->ss_tid = SMB_TID_UNKNOWN; 803 } 804 805 int 806 smb_share_valid(struct smb_share *ssp) 807 { 808 return ssp->ss_tid != SMB_TID_UNKNOWN && 809 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid; 810 } 811 812 const char* 813 smb_share_getpass(struct smb_share *ssp) 814 { 815 struct smb_vc *vcp; 816 817 if (ssp->ss_pass) 818 return ssp->ss_pass; 819 vcp = SSTOVC(ssp); 820 if (vcp->vc_pass) 821 return vcp->vc_pass; 822 return smb_emptypass; 823 } 824 825 static int 826 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip) 827 { 828 bzero(sip, sizeof(struct smb_share_info)); 829 sip->itype = SMB_INFO_SHARE; 830 sip->usecount = ssp->obj.co_usecount; 831 sip->tid = ssp->ss_tid; 832 sip->type= ssp->ss_type; 833 sip->uid = ssp->ss_uid; 834 sip->gid = ssp->ss_grp; 835 sip->mode= ssp->ss_mode; 836 sip->flags = ssp->obj.co_flags; 837 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name); 838 return 0; 839 } 840 841 /* 842 * Dump an entire tree into sysctl call 843 */ 844 static int 845 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS) 846 { 847 struct thread *td = req->td; 848 struct smb_cred scred; 849 struct smb_connobj *scp1, *scp2; 850 struct smb_vc *vcp; 851 struct smb_share *ssp; 852 struct smb_vc_info vci; 853 struct smb_share_info ssi; 854 int error, itype; 855 856 smb_makescred(&scred, td, td->td_ucred); 857 error = sysctl_wire_old_buffer(req, 0); 858 if (error) 859 return (error); 860 error = smb_sm_lockvclist(LK_SHARED); 861 if (error) 862 return error; 863 SMBCO_FOREACH(scp1, &smb_vclist) { 864 vcp = (struct smb_vc *)scp1; 865 error = smb_vc_lock(vcp, LK_SHARED); 866 if (error) 867 continue; 868 smb_vc_getinfo(vcp, &vci); 869 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info)); 870 if (error) { 871 smb_vc_unlock(vcp, 0); 872 break; 873 } 874 SMBCO_FOREACH(scp2, VCTOCP(vcp)) { 875 ssp = (struct smb_share *)scp2; 876 error = smb_share_lock(ssp, LK_SHARED); 877 if (error) { 878 error = 0; 879 continue; 880 } 881 smb_share_getinfo(ssp, &ssi); 882 smb_share_unlock(ssp, 0); 883 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info)); 884 if (error) 885 break; 886 } 887 smb_vc_unlock(vcp, 0); 888 if (error) 889 break; 890 } 891 if (!error) { 892 itype = SMB_INFO_NONE; 893 error = SYSCTL_OUT(req, &itype, sizeof(itype)); 894 } 895 smb_sm_unlockvclist(); 896 return error; 897 } 898