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 1.17 2006/07/28 02:17:41 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 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 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 72 /* 73 * Connection object 74 */ 75 static void smb_co_ref(struct smb_connobj *cp); 76 static void smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred); 77 static int smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred); 78 static void smb_co_put(struct smb_connobj *cp, struct smb_cred *scred); 79 static int smb_co_lock(struct smb_connobj *cp, int flags); 80 static void smb_co_unlock(struct smb_connobj *cp, int flags); 81 82 static smb_co_free_t smb_share_free; 83 static smb_co_gone_t smb_share_gone; 84 85 static int smb_sysctl_treedump(SYSCTL_HANDLER_ARGS); 86 87 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE, 88 NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree"); 89 90 int 91 smb_sm_init(void) 92 { 93 smb_co_init(&smb_vclist, SMBL_SM, "smbsm"); 94 smb_co_unlock(&smb_vclist, 0); 95 return 0; 96 } 97 98 int 99 smb_sm_done(void) 100 { 101 102 /* XXX: hold the mutex */ 103 if (smb_vclist.co_usecount > 1) { 104 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1); 105 return EBUSY; 106 } 107 smb_co_done(&smb_vclist); 108 return 0; 109 } 110 111 static int 112 smb_sm_lockvclist(int flags) 113 { 114 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE); 115 } 116 117 static void 118 smb_sm_unlockvclist(void) 119 { 120 smb_co_unlock(&smb_vclist, LK_RELEASE); 121 } 122 123 static int 124 smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 125 struct smb_cred *scred, struct smb_vc **vcpp) 126 { 127 struct smb_vc *vcp; 128 int exact = 1; 129 int error; 130 131 vcspec->shspec = shspec; 132 error = ENOENT; 133 SMBCO_FOREACH((struct smb_connobj*)vcp, &smb_vclist) { 134 error = smb_vc_lock(vcp, LK_EXCLUSIVE); 135 if (error) 136 continue; 137 itry { 138 if ((vcp->obj.co_flags & SMBV_PRIVATE) || 139 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) || 140 strcmp(vcp->vc_username, vcspec->username) != 0) 141 ithrow(1); 142 if (vcspec->owner != SMBM_ANY_OWNER) { 143 if (vcp->vc_uid != vcspec->owner) 144 ithrow(1); 145 } else 146 exact = 0; 147 if (vcspec->group != SMBM_ANY_GROUP) { 148 if (vcp->vc_grp != vcspec->group) 149 ithrow(1); 150 } else 151 exact = 0; 152 153 if (vcspec->mode & SMBM_EXACT) { 154 if (!exact || 155 (vcspec->mode & SMBM_MASK) != vcp->vc_mode) 156 ithrow(1); 157 } 158 if (smb_vc_access(vcp, scred, vcspec->mode) != 0) 159 ithrow(1); 160 vcspec->ssp = NULL; 161 if (shspec) 162 ithrow(smb_vc_lookupshare(vcp, shspec, scred, &vcspec->ssp)); 163 error = 0; 164 break; 165 } icatch(error) { 166 smb_vc_unlock(vcp, 0); 167 } ifinally { 168 } iendtry; 169 if (error == 0) 170 break; 171 } 172 if (vcp) { 173 smb_vc_ref(vcp); 174 *vcpp = vcp; 175 } 176 return error; 177 } 178 179 int 180 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 181 struct smb_cred *scred, struct smb_vc **vcpp) 182 { 183 struct smb_vc *vcp; 184 struct smb_share *ssp = NULL; 185 int error; 186 187 *vcpp = vcp = NULL; 188 189 error = smb_sm_lockvclist(LK_EXCLUSIVE); 190 if (error) 191 return error; 192 error = smb_sm_lookupint(vcspec, shspec, scred, vcpp); 193 if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) { 194 smb_sm_unlockvclist(); 195 return error; 196 } 197 error = smb_sm_lookupint(vcspec, NULL, scred, &vcp); 198 if (error) { 199 error = smb_vc_create(vcspec, scred, &vcp); 200 if (error) 201 goto out; 202 error = smb_vc_connect(vcp, scred); 203 if (error) 204 goto out; 205 } 206 if (shspec == NULL) 207 goto out; 208 error = smb_share_create(vcp, shspec, scred, &ssp); 209 if (error) 210 goto out; 211 error = smb_smb_treeconnect(ssp, scred); 212 if (error == 0) 213 vcspec->ssp = ssp; 214 else 215 smb_share_put(ssp, scred); 216 out: 217 smb_sm_unlockvclist(); 218 if (error == 0) 219 *vcpp = vcp; 220 else if (vcp) 221 smb_vc_put(vcp, scred); 222 return error; 223 } 224 225 /* 226 * Common code for connection object 227 */ 228 static void 229 smb_co_init(struct smb_connobj *cp, int level, char *objname) 230 { 231 SLIST_INIT(&cp->co_children); 232 smb_sl_init(&cp->co_interlock, objname); 233 lockinit(&cp->co_lock, objname, 0, 0); 234 cp->co_level = level; 235 cp->co_usecount = 1; 236 smb_co_lock(cp, LK_EXCLUSIVE); 237 } 238 239 static void 240 smb_co_done(struct smb_connobj *cp) 241 { 242 smb_sl_destroy(&cp->co_interlock); 243 lockdestroy(&cp->co_lock); 244 } 245 246 static void 247 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred) 248 { 249 struct smb_connobj *parent; 250 251 if (cp->co_gone) 252 cp->co_gone(cp, scred); 253 parent = cp->co_parent; 254 if (parent) { 255 smb_co_lock(parent, LK_EXCLUSIVE); 256 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next); 257 smb_co_put(parent, scred); 258 } 259 lockmgr(&cp->co_lock, LK_RELEASE); 260 while (cp->co_usecount > 0) { 261 tsleep(&cp->co_lock, 0, "smbgone", hz); 262 } 263 if (cp->co_free) 264 cp->co_free(cp); 265 } 266 267 void 268 smb_co_ref(struct smb_connobj *cp) 269 { 270 SMB_CO_LOCK(cp); 271 cp->co_usecount++; 272 SMB_CO_UNLOCK(cp); 273 } 274 275 void 276 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred) 277 { 278 SMB_CO_LOCK(cp); 279 if (cp->co_usecount > 1) { 280 cp->co_usecount--; 281 SMB_CO_UNLOCK(cp); 282 return; 283 } 284 if (cp->co_usecount <= 0) { 285 SMBERROR("negative use_count for object %d", cp->co_level); 286 SMB_CO_UNLOCK(cp); 287 return; 288 } 289 cp->co_usecount = 0; 290 if ((cp->co_flags & SMBO_GONE) == 0) { 291 cp->co_flags |= SMBO_GONE; 292 SMB_CO_UNLOCK(cp); 293 lockmgr(&cp->co_lock, LK_EXCLUSIVE); 294 smb_co_gone(cp, scred); 295 } else { 296 SMB_CO_UNLOCK(cp); 297 wakeup(&cp->co_lock); 298 } 299 } 300 301 int 302 smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred) 303 { 304 int error; 305 306 SMB_CO_LOCK(cp); 307 cp->co_usecount++; 308 SMB_CO_UNLOCK(cp); 309 error = smb_co_lock(cp, flags); 310 if (error) { 311 SMB_CO_LOCK(cp); 312 if (cp->co_usecount > 1) { 313 cp->co_usecount--; 314 SMB_CO_UNLOCK(cp); 315 } else if (cp->co_usecount <= 0) { 316 SMBERROR("negative use_count for object %d", cp->co_level); 317 SMB_CO_UNLOCK(cp); 318 } else { 319 cp->co_usecount = 0; 320 if ((cp->co_flags & SMBO_GONE) == 0) { 321 cp->co_flags |= SMBO_GONE; 322 SMB_CO_UNLOCK(cp); 323 lockmgr(&cp->co_lock, LK_EXCLUSIVE); 324 smb_co_gone(cp, scred); 325 } else { 326 SMB_CO_UNLOCK(cp); 327 } 328 } 329 return error; 330 } 331 return 0; 332 } 333 334 void 335 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred) 336 { 337 SMB_CO_LOCK(cp); 338 if (cp->co_usecount > 1) { 339 cp->co_usecount--; 340 SMB_CO_UNLOCK(cp); 341 lockmgr(&cp->co_lock, LK_RELEASE); 342 return; 343 } 344 if (cp->co_usecount <= 0) { 345 SMBERROR("negative use_count for object %d", cp->co_level); 346 SMB_CO_UNLOCK(cp); 347 return; 348 } 349 cp->co_usecount = 0; 350 if ((cp->co_flags & SMBO_GONE) == 0) { 351 cp->co_flags |= SMBO_GONE; 352 SMB_CO_UNLOCK(cp); 353 lockmgr(&cp->co_lock, LK_RELEASE); 354 lockmgr(&cp->co_lock, LK_EXCLUSIVE); 355 smb_co_gone(cp, scred); 356 } else { 357 SMB_CO_UNLOCK(cp); 358 lockmgr(&cp->co_lock, LK_RELEASE); 359 wakeup(&cp->co_lock); 360 } 361 } 362 363 int 364 smb_co_lockstatus(struct smb_connobj *cp, struct thread *td) 365 { 366 return lockstatus(&cp->co_lock, td); 367 } 368 369 int 370 smb_co_lock(struct smb_connobj *cp, int flags) 371 { 372 int error; 373 374 KKASSERT(cp->co_usecount > 0); 375 if (cp->co_flags & SMBO_GONE) 376 return EINVAL; 377 if ((flags & LK_TYPE_MASK) == 0) 378 flags |= LK_EXCLUSIVE; 379 if (smb_co_lockstatus(cp, curthread) == LK_EXCLUSIVE && 380 (flags & LK_CANRECURSE) == 0) { 381 SMBERROR("recursive lock for object %d\n", cp->co_level); 382 return 0; 383 } 384 error = lockmgr(&cp->co_lock, flags); 385 if (error == 0 && (cp->co_flags & SMBO_GONE)) { 386 lockmgr(&cp->co_lock, LK_RELEASE); 387 error = EINVAL; 388 } 389 return (error); 390 } 391 392 void 393 smb_co_unlock(struct smb_connobj *cp, int flags) 394 { 395 lockmgr(&cp->co_lock, flags | LK_RELEASE); 396 } 397 398 static void 399 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child) 400 { 401 KASSERT(smb_co_lockstatus(parent, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: parent not locked")); 402 KASSERT(smb_co_lockstatus(child, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: child not locked")); 403 404 smb_co_ref(parent); 405 SLIST_INSERT_HEAD(&parent->co_children, child, co_next); 406 child->co_parent = parent; 407 } 408 409 /* 410 * Session implementation 411 */ 412 413 int 414 smb_vc_create(struct smb_vcspec *vcspec, 415 struct smb_cred *scred, struct smb_vc **vcpp) 416 { 417 struct smb_vc *vcp; 418 struct ucred *cred = scred->scr_cred; 419 uid_t uid = vcspec->owner; 420 gid_t gid = vcspec->group; 421 uid_t realuid = cred->cr_uid; 422 char *domain = vcspec->domain; 423 int error, isroot; 424 425 isroot = smb_suser(cred) == 0; 426 /* 427 * Only superuser can create VCs with different uid and gid 428 */ 429 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 430 return EPERM; 431 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 432 return EPERM; 433 434 vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK); 435 smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc"); 436 vcp->obj.co_free = smb_vc_free; 437 vcp->obj.co_gone = smb_vc_gone; 438 vcp->vc_number = smb_vcnext++; 439 vcp->vc_timo = SMB_DEFRQTIMO; 440 vcp->vc_smbuid = SMB_UID_UNKNOWN; 441 vcp->vc_mode = vcspec->rights & SMBM_MASK; 442 vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE); 443 vcp->vc_tdesc = &smb_tran_nbtcp_desc; 444 445 if (uid == SMBM_ANY_OWNER) 446 uid = realuid; 447 if (gid == SMBM_ANY_GROUP) 448 gid = cred->cr_groups[0]; 449 vcp->vc_uid = uid; 450 vcp->vc_grp = gid; 451 452 smb_sl_init(&vcp->vc_stlock, "vcstlock"); 453 error = 0; 454 itry { 455 vcp->vc_paddr = dup_sockaddr(vcspec->sap); 456 ierror(vcp->vc_paddr == NULL, ENOMEM); 457 458 vcp->vc_laddr = dup_sockaddr(vcspec->lap); 459 ierror(vcp->vc_laddr == NULL, ENOMEM); 460 461 ierror((vcp->vc_pass = smb_strdup(vcspec->pass)) == NULL, ENOMEM); 462 463 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain : "NODOMAIN"); 464 ierror(vcp->vc_domain == NULL, ENOMEM); 465 466 ierror((vcp->vc_srvname = smb_strdup(vcspec->srvname)) == NULL, ENOMEM); 467 ierror((vcp->vc_username = smb_strdup(vcspec->username)) == NULL, ENOMEM); 468 469 ithrow(iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower)); 470 ithrow(iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper)); 471 if (vcspec->servercs[0]) { 472 ithrow(iconv_open(vcspec->servercs, vcspec->localcs, 473 &vcp->vc_toserver)); 474 ithrow(iconv_open(vcspec->localcs, vcspec->servercs, 475 &vcp->vc_tolocal)); 476 } 477 478 ithrow(smb_iod_create(vcp)); 479 *vcpp = vcp; 480 smb_co_addchild(&smb_vclist, VCTOCP(vcp)); 481 } icatch(error) { 482 smb_vc_put(vcp, scred); 483 } ifinally { 484 } iendtry; 485 return error; 486 } 487 488 static void 489 smb_vc_free(struct smb_connobj *cp) 490 { 491 struct smb_vc *vcp = CPTOVC(cp); 492 493 if (vcp->vc_iod) 494 smb_iod_destroy(vcp->vc_iod); 495 SMB_STRFREE(vcp->vc_username); 496 SMB_STRFREE(vcp->vc_srvname); 497 SMB_STRFREE(vcp->vc_pass); 498 SMB_STRFREE(vcp->vc_domain); 499 if (vcp->vc_paddr) 500 free(vcp->vc_paddr, M_SONAME); 501 if (vcp->vc_laddr) 502 free(vcp->vc_laddr, M_SONAME); 503 if (vcp->vc_tolower) 504 iconv_close(vcp->vc_tolower); 505 if (vcp->vc_toupper) 506 iconv_close(vcp->vc_toupper); 507 if (vcp->vc_tolocal) 508 iconv_close(vcp->vc_tolocal); 509 if (vcp->vc_toserver) 510 iconv_close(vcp->vc_toserver); 511 smb_co_done(VCTOCP(vcp)); 512 smb_sl_destroy(&vcp->vc_stlock); 513 free(vcp, M_SMBCONN); 514 } 515 516 /* 517 * Called when use count of VC dropped to zero. 518 */ 519 static void 520 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred) 521 { 522 struct smb_vc *vcp = CPTOVC(cp); 523 524 smb_vc_disconnect(vcp); 525 } 526 527 void 528 smb_vc_ref(struct smb_vc *vcp) 529 { 530 smb_co_ref(VCTOCP(vcp)); 531 } 532 533 void 534 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred) 535 { 536 smb_co_rele(VCTOCP(vcp), scred); 537 } 538 539 int 540 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred) 541 { 542 return smb_co_get(VCTOCP(vcp), flags, scred); 543 } 544 545 void 546 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred) 547 { 548 smb_co_put(VCTOCP(vcp), scred); 549 } 550 551 int 552 smb_vc_lock(struct smb_vc *vcp, int flags) 553 { 554 return smb_co_lock(VCTOCP(vcp), flags); 555 } 556 557 void 558 smb_vc_unlock(struct smb_vc *vcp, int flags) 559 { 560 smb_co_unlock(VCTOCP(vcp), flags); 561 } 562 563 int 564 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode) 565 { 566 struct ucred *cred = scred->scr_cred; 567 568 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid) 569 return 0; 570 mode >>= 3; 571 if (!groupmember(vcp->vc_grp, cred)) 572 mode >>= 3; 573 return (vcp->vc_mode & mode) == mode ? 0 : EACCES; 574 } 575 576 static int 577 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp) 578 { 579 int exact = 1; 580 581 if (strcmp(ssp->ss_name, dp->name) != 0) 582 return 1; 583 if (dp->owner != SMBM_ANY_OWNER) { 584 if (ssp->ss_uid != dp->owner) 585 return 1; 586 } else 587 exact = 0; 588 if (dp->group != SMBM_ANY_GROUP) { 589 if (ssp->ss_grp != dp->group) 590 return 1; 591 } else 592 exact = 0; 593 594 if (dp->mode & SMBM_EXACT) { 595 if (!exact) 596 return 1; 597 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1; 598 } 599 if (smb_share_access(ssp, dp->scred, dp->mode) != 0) 600 return 1; 601 return 0; 602 } 603 604 /* 605 * Lookup share in the given VC. Share referenced and locked on return. 606 * VC expected to be locked on entry and will be left locked on exit. 607 */ 608 int 609 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp, 610 struct smb_cred *scred, struct smb_share **sspp) 611 { 612 struct smb_share *ssp = NULL; 613 int error; 614 615 *sspp = NULL; 616 dp->scred = scred; 617 SMBCO_FOREACH((struct smb_connobj*)ssp, VCTOCP(vcp)) { 618 error = smb_share_lock(ssp, LK_EXCLUSIVE); 619 if (error) 620 continue; 621 if (smb_vc_cmpshare(ssp, dp) == 0) 622 break; 623 smb_share_unlock(ssp, 0); 624 } 625 if (ssp) { 626 smb_share_ref(ssp); 627 *sspp = ssp; 628 error = 0; 629 } else 630 error = ENOENT; 631 return error; 632 } 633 634 int 635 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 636 { 637 638 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 639 } 640 641 /* 642 * Destroy VC to server, invalidate shares linked with it. 643 * Transport should be locked on entry. 644 */ 645 int 646 smb_vc_disconnect(struct smb_vc *vcp) 647 { 648 649 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 650 return 0; 651 } 652 653 static char smb_emptypass[] = ""; 654 655 const char * 656 smb_vc_getpass(struct smb_vc *vcp) 657 { 658 if (vcp->vc_pass) 659 return vcp->vc_pass; 660 return smb_emptypass; 661 } 662 663 static int 664 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip) 665 { 666 bzero(vip, sizeof(struct smb_vc_info)); 667 vip->itype = SMB_INFO_VC; 668 vip->usecount = vcp->obj.co_usecount; 669 vip->uid = vcp->vc_uid; 670 vip->gid = vcp->vc_grp; 671 vip->mode = vcp->vc_mode; 672 vip->flags = vcp->obj.co_flags; 673 vip->sopt = vcp->vc_sopt; 674 vip->iodstate = vcp->vc_iod->iod_state; 675 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey)); 676 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname); 677 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username); 678 return 0; 679 } 680 681 u_short 682 smb_vc_nextmid(struct smb_vc *vcp) 683 { 684 u_short r; 685 686 SMB_CO_LOCK(&vcp->obj); 687 r = vcp->vc_mid++; 688 SMB_CO_UNLOCK(&vcp->obj); 689 return r; 690 } 691 692 /* 693 * Share implementation 694 */ 695 /* 696 * Allocate share structure and attach it to the given VC 697 * Connection expected to be locked on entry. Share will be returned 698 * in locked state. 699 */ 700 int 701 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 702 struct smb_cred *scred, struct smb_share **sspp) 703 { 704 struct smb_share *ssp; 705 struct ucred *cred = scred->scr_cred; 706 uid_t realuid = cred->cr_uid; 707 uid_t uid = shspec->owner; 708 gid_t gid = shspec->group; 709 int error, isroot; 710 711 isroot = smb_suser(cred) == 0; 712 /* 713 * Only superuser can create shares with different uid and gid 714 */ 715 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 716 return EPERM; 717 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 718 return EPERM; 719 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp); 720 if (!error) { 721 smb_share_put(ssp, scred); 722 return EEXIST; 723 } 724 if (uid == SMBM_ANY_OWNER) 725 uid = realuid; 726 if (gid == SMBM_ANY_GROUP) 727 gid = cred->cr_groups[0]; 728 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK); 729 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss"); 730 ssp->obj.co_free = smb_share_free; 731 ssp->obj.co_gone = smb_share_gone; 732 smb_sl_init(&ssp->ss_stlock, "ssstlock"); 733 ssp->ss_name = smb_strdup(shspec->name); 734 if (shspec->pass && shspec->pass[0]) 735 ssp->ss_pass = smb_strdup(shspec->pass); 736 ssp->ss_type = shspec->stype; 737 ssp->ss_tid = SMB_TID_UNKNOWN; 738 ssp->ss_uid = uid; 739 ssp->ss_grp = gid; 740 ssp->ss_mode = shspec->rights & SMBM_MASK; 741 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp)); 742 *sspp = ssp; 743 return 0; 744 } 745 746 static void 747 smb_share_free(struct smb_connobj *cp) 748 { 749 struct smb_share *ssp = CPTOSS(cp); 750 751 SMB_STRFREE(ssp->ss_name); 752 SMB_STRFREE(ssp->ss_pass); 753 smb_sl_destroy(&ssp->ss_stlock); 754 smb_co_done(SSTOCP(ssp)); 755 free(ssp, M_SMBCONN); 756 } 757 758 static void 759 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred) 760 { 761 struct smb_share *ssp = CPTOSS(cp); 762 763 smb_smb_treedisconnect(ssp, scred); 764 } 765 766 void 767 smb_share_ref(struct smb_share *ssp) 768 { 769 smb_co_ref(SSTOCP(ssp)); 770 } 771 772 void 773 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred) 774 { 775 smb_co_rele(SSTOCP(ssp), scred); 776 } 777 778 int 779 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred) 780 { 781 return smb_co_get(SSTOCP(ssp), flags, scred); 782 } 783 784 void 785 smb_share_put(struct smb_share *ssp, struct smb_cred *scred) 786 { 787 smb_co_put(SSTOCP(ssp), scred); 788 } 789 790 int 791 smb_share_lock(struct smb_share *ssp, int flags) 792 { 793 return smb_co_lock(SSTOCP(ssp), flags); 794 } 795 796 void 797 smb_share_unlock(struct smb_share *ssp, int flags) 798 { 799 smb_co_unlock(SSTOCP(ssp), flags); 800 } 801 802 int 803 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode) 804 { 805 struct ucred *cred = scred->scr_cred; 806 807 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid) 808 return 0; 809 mode >>= 3; 810 if (!groupmember(ssp->ss_grp, cred)) 811 mode >>= 3; 812 return (ssp->ss_mode & mode) == mode ? 0 : EACCES; 813 } 814 815 void 816 smb_share_invalidate(struct smb_share *ssp) 817 { 818 ssp->ss_tid = SMB_TID_UNKNOWN; 819 } 820 821 int 822 smb_share_valid(struct smb_share *ssp) 823 { 824 return ssp->ss_tid != SMB_TID_UNKNOWN && 825 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid; 826 } 827 828 const char* 829 smb_share_getpass(struct smb_share *ssp) 830 { 831 struct smb_vc *vcp; 832 833 if (ssp->ss_pass) 834 return ssp->ss_pass; 835 vcp = SSTOVC(ssp); 836 if (vcp->vc_pass) 837 return vcp->vc_pass; 838 return smb_emptypass; 839 } 840 841 static int 842 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip) 843 { 844 bzero(sip, sizeof(struct smb_share_info)); 845 sip->itype = SMB_INFO_SHARE; 846 sip->usecount = ssp->obj.co_usecount; 847 sip->tid = ssp->ss_tid; 848 sip->type= ssp->ss_type; 849 sip->uid = ssp->ss_uid; 850 sip->gid = ssp->ss_grp; 851 sip->mode= ssp->ss_mode; 852 sip->flags = ssp->obj.co_flags; 853 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name); 854 return 0; 855 } 856 857 /* 858 * Dump an entire tree into sysctl call 859 */ 860 static int 861 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS) 862 { 863 struct thread *td = req->td; 864 struct ucred *ucred; 865 struct smb_cred scred; 866 struct smb_vc *vcp; 867 struct smb_share *ssp; 868 struct smb_vc_info vci; 869 struct smb_share_info ssi; 870 int error, itype; 871 872 KKASSERT(td->td_proc); 873 ucred = td->td_proc->p_ucred; 874 875 smb_makescred(&scred, td, ucred); 876 error = smb_sm_lockvclist(LK_SHARED); 877 if (error) 878 return error; 879 SMBCO_FOREACH((struct smb_connobj*)vcp, &smb_vclist) { 880 error = smb_vc_lock(vcp, LK_SHARED); 881 if (error) 882 continue; 883 smb_vc_getinfo(vcp, &vci); 884 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info)); 885 if (error) { 886 smb_vc_unlock(vcp, 0); 887 break; 888 } 889 SMBCO_FOREACH((struct smb_connobj*)ssp, VCTOCP(vcp)) { 890 error = smb_share_lock(ssp, LK_SHARED); 891 if (error) { 892 error = 0; 893 continue; 894 } 895 smb_share_getinfo(ssp, &ssi); 896 smb_share_unlock(ssp, 0); 897 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info)); 898 if (error) 899 break; 900 } 901 smb_vc_unlock(vcp, 0); 902 if (error) 903 break; 904 } 905 if (!error) { 906 itype = SMB_INFO_NONE; 907 error = SYSCTL_OUT(req, &itype, sizeof(itype)); 908 } 909 smb_sm_unlockvclist(); 910 return error; 911 } 912