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 1.20 2006/12/20 18:14:44 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/priv.h> 46 #include <sys/lock.h> 47 #include <sys/sysctl.h> 48 #include <sys/socketvar.h> 49 50 #include <sys/iconv.h> 51 52 #include "smb.h" 53 #include "smb_subr.h" 54 #include "smb_conn.h" 55 #include "smb_tran.h" 56 #include "smb_trantcp.h" 57 58 static struct smb_connobj smb_vclist; 59 static int smb_vcnext = 1; /* next unique id for VC */ 60 61 SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol"); 62 63 MALLOC_DEFINE(M_SMBCONN, "SMB conn", "SMB connection"); 64 65 static void smb_co_init(struct smb_connobj *cp, int level, char *objname); 66 static void smb_co_done(struct smb_connobj *cp); 67 static int smb_co_lockstatus(struct smb_connobj *cp, struct thread *td); 68 69 static int smb_vc_disconnect(struct smb_vc *vcp); 70 static void smb_vc_free(struct smb_connobj *cp); 71 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred); 72 73 /* 74 * Connection object 75 */ 76 static void smb_co_ref(struct smb_connobj *cp); 77 static void smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred); 78 static int smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred); 79 static void smb_co_put(struct smb_connobj *cp, struct smb_cred *scred); 80 static int smb_co_lock(struct smb_connobj *cp, int flags); 81 static void smb_co_unlock(struct smb_connobj *cp, int flags); 82 83 static smb_co_free_t smb_share_free; 84 static smb_co_gone_t smb_share_gone; 85 86 static int smb_sysctl_treedump(SYSCTL_HANDLER_ARGS); 87 88 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE, 89 NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree"); 90 91 int 92 smb_sm_init(void) 93 { 94 smb_co_init(&smb_vclist, SMBL_SM, "smbsm"); 95 smb_co_unlock(&smb_vclist, 0); 96 return 0; 97 } 98 99 int 100 smb_sm_done(void) 101 { 102 103 /* XXX: hold the mutex */ 104 if (smb_vclist.co_usecount > 1) { 105 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1); 106 return EBUSY; 107 } 108 smb_co_done(&smb_vclist); 109 return 0; 110 } 111 112 static int 113 smb_sm_lockvclist(int flags) 114 { 115 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE); 116 } 117 118 static void 119 smb_sm_unlockvclist(void) 120 { 121 smb_co_unlock(&smb_vclist, LK_RELEASE); 122 } 123 124 static int 125 smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 126 struct smb_cred *scred, struct smb_vc **vcpp) 127 { 128 struct smb_connobj *scp; 129 struct smb_vc *vcp; 130 int exact = 1; 131 int error; 132 133 vcspec->shspec = shspec; 134 error = ENOENT; 135 vcp = NULL; 136 SMBCO_FOREACH(scp, &smb_vclist) { 137 vcp = (struct smb_vc *)scp; 138 error = smb_vc_lock(vcp, LK_EXCLUSIVE); 139 if (error) 140 continue; 141 142 error = 1; 143 if ((vcp->obj.co_flags & SMBV_PRIVATE) || 144 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) || 145 strcmp(vcp->vc_username, vcspec->username) != 0) 146 goto unlock; 147 if (vcspec->owner != SMBM_ANY_OWNER) { 148 if (vcp->vc_uid != vcspec->owner) 149 goto unlock; 150 } else 151 exact = 0; 152 if (vcspec->group != SMBM_ANY_GROUP) { 153 if (vcp->vc_grp != vcspec->group) 154 goto unlock; 155 } else 156 exact = 0; 157 158 if (vcspec->mode & SMBM_EXACT) { 159 if (!exact || 160 (vcspec->mode & SMBM_MASK) != vcp->vc_mode) 161 goto unlock; 162 } 163 if (smb_vc_access(vcp, scred, vcspec->mode) != 0) 164 goto unlock; 165 vcspec->ssp = NULL; 166 if (shspec) { 167 error = smb_vc_lookupshare(vcp, shspec, scred, &vcspec->ssp); 168 if (error != 0) 169 goto unlock; 170 } 171 error = 0; 172 break; 173 unlock: 174 smb_vc_unlock(vcp, 0); 175 } 176 if (vcp) { 177 smb_vc_ref(vcp); 178 *vcpp = vcp; 179 } 180 return error; 181 } 182 183 int 184 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 185 struct smb_cred *scred, struct smb_vc **vcpp) 186 { 187 struct smb_vc *vcp; 188 struct smb_share *ssp = NULL; 189 int error; 190 191 *vcpp = vcp = NULL; 192 193 error = smb_sm_lockvclist(LK_EXCLUSIVE); 194 if (error) 195 return error; 196 error = smb_sm_lookupint(vcspec, shspec, scred, vcpp); 197 if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) { 198 smb_sm_unlockvclist(); 199 return error; 200 } 201 error = smb_sm_lookupint(vcspec, NULL, scred, &vcp); 202 if (error) { 203 error = smb_vc_create(vcspec, scred, &vcp); 204 if (error) 205 goto out; 206 error = smb_vc_connect(vcp, scred); 207 if (error) 208 goto out; 209 } 210 if (shspec == NULL) 211 goto out; 212 error = smb_share_create(vcp, shspec, scred, &ssp); 213 if (error) 214 goto out; 215 error = smb_smb_treeconnect(ssp, scred); 216 if (error == 0) 217 vcspec->ssp = ssp; 218 else 219 smb_share_put(ssp, scred); 220 out: 221 smb_sm_unlockvclist(); 222 if (error == 0) 223 *vcpp = vcp; 224 else if (vcp) 225 smb_vc_put(vcp, scred); 226 return error; 227 } 228 229 /* 230 * Common code for connection object 231 */ 232 static void 233 smb_co_init(struct smb_connobj *cp, int level, char *objname) 234 { 235 SLIST_INIT(&cp->co_children); 236 smb_sl_init(&cp->co_interlock, objname); 237 lockinit(&cp->co_lock, objname, 0, 0); 238 cp->co_level = level; 239 cp->co_usecount = 1; 240 smb_co_lock(cp, LK_EXCLUSIVE); 241 } 242 243 static void 244 smb_co_done(struct smb_connobj *cp) 245 { 246 smb_sl_destroy(&cp->co_interlock); 247 lockdestroy(&cp->co_lock); 248 } 249 250 static void 251 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred) 252 { 253 struct smb_connobj *parent; 254 255 if (cp->co_gone) 256 cp->co_gone(cp, scred); 257 parent = cp->co_parent; 258 if (parent) { 259 smb_co_lock(parent, LK_EXCLUSIVE); 260 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next); 261 smb_co_put(parent, scred); 262 } 263 lockmgr(&cp->co_lock, LK_RELEASE); 264 while (cp->co_usecount > 0) { 265 tsleep(&cp->co_lock, 0, "smbgone", hz); 266 } 267 if (cp->co_free) 268 cp->co_free(cp); 269 } 270 271 void 272 smb_co_ref(struct smb_connobj *cp) 273 { 274 SMB_CO_LOCK(cp); 275 cp->co_usecount++; 276 SMB_CO_UNLOCK(cp); 277 } 278 279 void 280 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred) 281 { 282 SMB_CO_LOCK(cp); 283 if (cp->co_usecount > 1) { 284 cp->co_usecount--; 285 SMB_CO_UNLOCK(cp); 286 return; 287 } 288 if (cp->co_usecount <= 0) { 289 SMBERROR("negative use_count for object %d", cp->co_level); 290 SMB_CO_UNLOCK(cp); 291 return; 292 } 293 cp->co_usecount = 0; 294 if ((cp->co_flags & SMBO_GONE) == 0) { 295 cp->co_flags |= SMBO_GONE; 296 SMB_CO_UNLOCK(cp); 297 lockmgr(&cp->co_lock, LK_EXCLUSIVE); 298 smb_co_gone(cp, scred); 299 } else { 300 SMB_CO_UNLOCK(cp); 301 wakeup(&cp->co_lock); 302 } 303 } 304 305 int 306 smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred) 307 { 308 int error; 309 310 SMB_CO_LOCK(cp); 311 cp->co_usecount++; 312 SMB_CO_UNLOCK(cp); 313 error = smb_co_lock(cp, flags); 314 if (error) { 315 SMB_CO_LOCK(cp); 316 if (cp->co_usecount > 1) { 317 cp->co_usecount--; 318 SMB_CO_UNLOCK(cp); 319 } else if (cp->co_usecount <= 0) { 320 SMBERROR("negative use_count for object %d", cp->co_level); 321 SMB_CO_UNLOCK(cp); 322 } else { 323 cp->co_usecount = 0; 324 if ((cp->co_flags & SMBO_GONE) == 0) { 325 cp->co_flags |= SMBO_GONE; 326 SMB_CO_UNLOCK(cp); 327 lockmgr(&cp->co_lock, LK_EXCLUSIVE); 328 smb_co_gone(cp, scred); 329 } else { 330 SMB_CO_UNLOCK(cp); 331 } 332 } 333 return error; 334 } 335 return 0; 336 } 337 338 void 339 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred) 340 { 341 SMB_CO_LOCK(cp); 342 if (cp->co_usecount > 1) { 343 cp->co_usecount--; 344 SMB_CO_UNLOCK(cp); 345 lockmgr(&cp->co_lock, LK_RELEASE); 346 return; 347 } 348 if (cp->co_usecount <= 0) { 349 SMBERROR("negative use_count for object %d", cp->co_level); 350 SMB_CO_UNLOCK(cp); 351 return; 352 } 353 cp->co_usecount = 0; 354 if ((cp->co_flags & SMBO_GONE) == 0) { 355 cp->co_flags |= SMBO_GONE; 356 SMB_CO_UNLOCK(cp); 357 lockmgr(&cp->co_lock, LK_RELEASE); 358 lockmgr(&cp->co_lock, LK_EXCLUSIVE); 359 smb_co_gone(cp, scred); 360 } else { 361 SMB_CO_UNLOCK(cp); 362 lockmgr(&cp->co_lock, LK_RELEASE); 363 wakeup(&cp->co_lock); 364 } 365 } 366 367 int 368 smb_co_lockstatus(struct smb_connobj *cp, struct thread *td) 369 { 370 return lockstatus(&cp->co_lock, td); 371 } 372 373 int 374 smb_co_lock(struct smb_connobj *cp, int flags) 375 { 376 int error; 377 378 KKASSERT(cp->co_usecount > 0); 379 if (cp->co_flags & SMBO_GONE) 380 return EINVAL; 381 if ((flags & LK_TYPE_MASK) == 0) 382 flags |= LK_EXCLUSIVE; 383 if (smb_co_lockstatus(cp, curthread) == LK_EXCLUSIVE && 384 (flags & LK_CANRECURSE) == 0) { 385 SMBERROR("recursive lock for object %d\n", cp->co_level); 386 return 0; 387 } 388 error = lockmgr(&cp->co_lock, flags); 389 if (error == 0 && (cp->co_flags & SMBO_GONE)) { 390 lockmgr(&cp->co_lock, LK_RELEASE); 391 error = EINVAL; 392 } 393 return (error); 394 } 395 396 void 397 smb_co_unlock(struct smb_connobj *cp, int flags) 398 { 399 lockmgr(&cp->co_lock, flags | LK_RELEASE); 400 } 401 402 static void 403 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child) 404 { 405 KASSERT(smb_co_lockstatus(parent, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: parent not locked")); 406 KASSERT(smb_co_lockstatus(child, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: child not locked")); 407 408 smb_co_ref(parent); 409 SLIST_INSERT_HEAD(&parent->co_children, child, co_next); 410 child->co_parent = parent; 411 } 412 413 /* 414 * Session implementation 415 */ 416 417 int 418 smb_vc_create(struct smb_vcspec *vcspec, 419 struct smb_cred *scred, struct smb_vc **vcpp) 420 { 421 struct smb_vc *vcp; 422 struct ucred *cred = scred->scr_cred; 423 uid_t uid = vcspec->owner; 424 gid_t gid = vcspec->group; 425 uid_t realuid = cred->cr_uid; 426 char *domain = vcspec->domain; 427 int error, isroot; 428 429 isroot = smb_suser(cred) == 0; 430 /* 431 * Only superuser can create VCs with different uid and gid 432 */ 433 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 434 return EPERM; 435 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 436 return EPERM; 437 438 vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK); 439 smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc"); 440 vcp->obj.co_free = smb_vc_free; 441 vcp->obj.co_gone = smb_vc_gone; 442 vcp->vc_number = smb_vcnext++; 443 vcp->vc_timo = SMB_DEFRQTIMO; 444 vcp->vc_smbuid = SMB_UID_UNKNOWN; 445 vcp->vc_mode = vcspec->rights & SMBM_MASK; 446 vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE); 447 vcp->vc_tdesc = &smb_tran_nbtcp_desc; 448 449 if (uid == SMBM_ANY_OWNER) 450 uid = realuid; 451 if (gid == SMBM_ANY_GROUP) 452 gid = cred->cr_groups[0]; 453 vcp->vc_uid = uid; 454 vcp->vc_grp = gid; 455 456 smb_sl_init(&vcp->vc_stlock, "vcstlock"); 457 458 do { 459 error = ENOMEM; 460 vcp->vc_paddr = dup_sockaddr(vcspec->sap); 461 if (vcp->vc_paddr == NULL) 462 break; 463 464 vcp->vc_laddr = dup_sockaddr(vcspec->lap); 465 if (vcp->vc_laddr == NULL) 466 break; 467 468 vcp->vc_pass = smb_strdup(vcspec->pass); 469 if (vcp->vc_pass == NULL) 470 break; 471 472 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain 473 : "NODOMAIN"); 474 if (vcp->vc_domain == NULL) 475 break; 476 477 vcp->vc_srvname = smb_strdup(vcspec->srvname); 478 if (vcp->vc_srvname == NULL) 479 break; 480 vcp->vc_username = smb_strdup(vcspec->username); 481 if (vcp->vc_username == NULL) 482 break; 483 484 error = iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower); 485 if (error != 0) 486 break; 487 error = iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper); 488 if (error != 0) 489 break; 490 491 if (vcspec->servercs[0]) { 492 error = iconv_open(vcspec->servercs, vcspec->localcs, 493 &vcp->vc_toserver); 494 if (error != 0) 495 break; 496 error = iconv_open(vcspec->localcs, vcspec->servercs, 497 &vcp->vc_tolocal); 498 if (error != 0) 499 break; 500 } 501 502 error = smb_iod_create(vcp); 503 if (error != 0) 504 break; 505 *vcpp = vcp; 506 smb_co_addchild(&smb_vclist, VCTOCP(vcp)); 507 error = 0; 508 } while (0); 509 510 if (error) 511 smb_vc_put(vcp, scred); 512 return error; 513 } 514 515 static void 516 smb_vc_free(struct smb_connobj *cp) 517 { 518 struct smb_vc *vcp = CPTOVC(cp); 519 520 if (vcp->vc_iod) 521 smb_iod_destroy(vcp->vc_iod); 522 SMB_STRFREE(vcp->vc_username); 523 SMB_STRFREE(vcp->vc_srvname); 524 SMB_STRFREE(vcp->vc_pass); 525 SMB_STRFREE(vcp->vc_domain); 526 if (vcp->vc_paddr) 527 kfree(vcp->vc_paddr, M_SONAME); 528 if (vcp->vc_laddr) 529 kfree(vcp->vc_laddr, M_SONAME); 530 if (vcp->vc_tolower) 531 iconv_close(vcp->vc_tolower); 532 if (vcp->vc_toupper) 533 iconv_close(vcp->vc_toupper); 534 if (vcp->vc_tolocal) 535 iconv_close(vcp->vc_tolocal); 536 if (vcp->vc_toserver) 537 iconv_close(vcp->vc_toserver); 538 smb_co_done(VCTOCP(vcp)); 539 smb_sl_destroy(&vcp->vc_stlock); 540 kfree(vcp, M_SMBCONN); 541 } 542 543 /* 544 * Called when use count of VC dropped to zero. 545 */ 546 static void 547 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred) 548 { 549 struct smb_vc *vcp = CPTOVC(cp); 550 551 smb_vc_disconnect(vcp); 552 } 553 554 void 555 smb_vc_ref(struct smb_vc *vcp) 556 { 557 smb_co_ref(VCTOCP(vcp)); 558 } 559 560 void 561 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred) 562 { 563 smb_co_rele(VCTOCP(vcp), scred); 564 } 565 566 int 567 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred) 568 { 569 return smb_co_get(VCTOCP(vcp), flags, scred); 570 } 571 572 void 573 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred) 574 { 575 smb_co_put(VCTOCP(vcp), scred); 576 } 577 578 int 579 smb_vc_lock(struct smb_vc *vcp, int flags) 580 { 581 return smb_co_lock(VCTOCP(vcp), flags); 582 } 583 584 void 585 smb_vc_unlock(struct smb_vc *vcp, int flags) 586 { 587 smb_co_unlock(VCTOCP(vcp), flags); 588 } 589 590 int 591 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode) 592 { 593 struct ucred *cred = scred->scr_cred; 594 595 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid) 596 return 0; 597 mode >>= 3; 598 if (!groupmember(vcp->vc_grp, cred)) 599 mode >>= 3; 600 return (vcp->vc_mode & mode) == mode ? 0 : EACCES; 601 } 602 603 static int 604 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp) 605 { 606 int exact = 1; 607 608 if (strcmp(ssp->ss_name, dp->name) != 0) 609 return 1; 610 if (dp->owner != SMBM_ANY_OWNER) { 611 if (ssp->ss_uid != dp->owner) 612 return 1; 613 } else 614 exact = 0; 615 if (dp->group != SMBM_ANY_GROUP) { 616 if (ssp->ss_grp != dp->group) 617 return 1; 618 } else 619 exact = 0; 620 621 if (dp->mode & SMBM_EXACT) { 622 if (!exact) 623 return 1; 624 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1; 625 } 626 if (smb_share_access(ssp, dp->scred, dp->mode) != 0) 627 return 1; 628 return 0; 629 } 630 631 /* 632 * Lookup share in the given VC. Share referenced and locked on return. 633 * VC expected to be locked on entry and will be left locked on exit. 634 */ 635 int 636 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp, 637 struct smb_cred *scred, struct smb_share **sspp) 638 { 639 struct smb_connobj *scp = NULL; 640 struct smb_share *ssp = NULL; 641 int error; 642 643 *sspp = NULL; 644 dp->scred = scred; 645 SMBCO_FOREACH(scp, VCTOCP(vcp)) { 646 ssp = (struct smb_share *)scp; 647 error = smb_share_lock(ssp, LK_EXCLUSIVE); 648 if (error) 649 continue; 650 if (smb_vc_cmpshare(ssp, dp) == 0) 651 break; 652 smb_share_unlock(ssp, 0); 653 } 654 if (ssp) { 655 smb_share_ref(ssp); 656 *sspp = ssp; 657 error = 0; 658 } else 659 error = ENOENT; 660 return error; 661 } 662 663 int 664 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 665 { 666 667 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 668 } 669 670 /* 671 * Destroy VC to server, invalidate shares linked with it. 672 * Transport should be locked on entry. 673 */ 674 int 675 smb_vc_disconnect(struct smb_vc *vcp) 676 { 677 678 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 679 return 0; 680 } 681 682 static char smb_emptypass[] = ""; 683 684 const char * 685 smb_vc_getpass(struct smb_vc *vcp) 686 { 687 if (vcp->vc_pass) 688 return vcp->vc_pass; 689 return smb_emptypass; 690 } 691 692 static int 693 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip) 694 { 695 bzero(vip, sizeof(struct smb_vc_info)); 696 vip->itype = SMB_INFO_VC; 697 vip->usecount = vcp->obj.co_usecount; 698 vip->uid = vcp->vc_uid; 699 vip->gid = vcp->vc_grp; 700 vip->mode = vcp->vc_mode; 701 vip->flags = vcp->obj.co_flags; 702 vip->sopt = vcp->vc_sopt; 703 vip->iodstate = vcp->vc_iod->iod_state; 704 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey)); 705 ksnprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname); 706 ksnprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username); 707 return 0; 708 } 709 710 u_short 711 smb_vc_nextmid(struct smb_vc *vcp) 712 { 713 u_short r; 714 715 SMB_CO_LOCK(&vcp->obj); 716 r = vcp->vc_mid++; 717 SMB_CO_UNLOCK(&vcp->obj); 718 return r; 719 } 720 721 /* 722 * Share implementation 723 */ 724 /* 725 * Allocate share structure and attach it to the given VC 726 * Connection expected to be locked on entry. Share will be returned 727 * in locked state. 728 */ 729 int 730 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 731 struct smb_cred *scred, struct smb_share **sspp) 732 { 733 struct smb_share *ssp; 734 struct ucred *cred = scred->scr_cred; 735 uid_t realuid = cred->cr_uid; 736 uid_t uid = shspec->owner; 737 gid_t gid = shspec->group; 738 int error, isroot; 739 740 isroot = smb_suser(cred) == 0; 741 /* 742 * Only superuser can create shares with different uid and gid 743 */ 744 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 745 return EPERM; 746 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 747 return EPERM; 748 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp); 749 if (!error) { 750 smb_share_put(ssp, scred); 751 return EEXIST; 752 } 753 if (uid == SMBM_ANY_OWNER) 754 uid = realuid; 755 if (gid == SMBM_ANY_GROUP) 756 gid = cred->cr_groups[0]; 757 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK); 758 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss"); 759 ssp->obj.co_free = smb_share_free; 760 ssp->obj.co_gone = smb_share_gone; 761 smb_sl_init(&ssp->ss_stlock, "ssstlock"); 762 ssp->ss_name = smb_strdup(shspec->name); 763 if (shspec->pass && shspec->pass[0]) 764 ssp->ss_pass = smb_strdup(shspec->pass); 765 ssp->ss_type = shspec->stype; 766 ssp->ss_tid = SMB_TID_UNKNOWN; 767 ssp->ss_uid = uid; 768 ssp->ss_grp = gid; 769 ssp->ss_mode = shspec->rights & SMBM_MASK; 770 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp)); 771 *sspp = ssp; 772 return 0; 773 } 774 775 static void 776 smb_share_free(struct smb_connobj *cp) 777 { 778 struct smb_share *ssp = CPTOSS(cp); 779 780 SMB_STRFREE(ssp->ss_name); 781 SMB_STRFREE(ssp->ss_pass); 782 smb_sl_destroy(&ssp->ss_stlock); 783 smb_co_done(SSTOCP(ssp)); 784 kfree(ssp, M_SMBCONN); 785 } 786 787 static void 788 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred) 789 { 790 struct smb_share *ssp = CPTOSS(cp); 791 792 smb_smb_treedisconnect(ssp, scred); 793 } 794 795 void 796 smb_share_ref(struct smb_share *ssp) 797 { 798 smb_co_ref(SSTOCP(ssp)); 799 } 800 801 void 802 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred) 803 { 804 smb_co_rele(SSTOCP(ssp), scred); 805 } 806 807 int 808 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred) 809 { 810 return smb_co_get(SSTOCP(ssp), flags, scred); 811 } 812 813 void 814 smb_share_put(struct smb_share *ssp, struct smb_cred *scred) 815 { 816 smb_co_put(SSTOCP(ssp), scred); 817 } 818 819 int 820 smb_share_lock(struct smb_share *ssp, int flags) 821 { 822 return smb_co_lock(SSTOCP(ssp), flags); 823 } 824 825 void 826 smb_share_unlock(struct smb_share *ssp, int flags) 827 { 828 smb_co_unlock(SSTOCP(ssp), flags); 829 } 830 831 int 832 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode) 833 { 834 struct ucred *cred = scred->scr_cred; 835 836 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid) 837 return 0; 838 mode >>= 3; 839 if (!groupmember(ssp->ss_grp, cred)) 840 mode >>= 3; 841 return (ssp->ss_mode & mode) == mode ? 0 : EACCES; 842 } 843 844 void 845 smb_share_invalidate(struct smb_share *ssp) 846 { 847 ssp->ss_tid = SMB_TID_UNKNOWN; 848 } 849 850 int 851 smb_share_valid(struct smb_share *ssp) 852 { 853 return ssp->ss_tid != SMB_TID_UNKNOWN && 854 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid; 855 } 856 857 const char* 858 smb_share_getpass(struct smb_share *ssp) 859 { 860 struct smb_vc *vcp; 861 862 if (ssp->ss_pass) 863 return ssp->ss_pass; 864 vcp = SSTOVC(ssp); 865 if (vcp->vc_pass) 866 return vcp->vc_pass; 867 return smb_emptypass; 868 } 869 870 static int 871 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip) 872 { 873 bzero(sip, sizeof(struct smb_share_info)); 874 sip->itype = SMB_INFO_SHARE; 875 sip->usecount = ssp->obj.co_usecount; 876 sip->tid = ssp->ss_tid; 877 sip->type= ssp->ss_type; 878 sip->uid = ssp->ss_uid; 879 sip->gid = ssp->ss_grp; 880 sip->mode= ssp->ss_mode; 881 sip->flags = ssp->obj.co_flags; 882 ksnprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name); 883 return 0; 884 } 885 886 /* 887 * Dump an entire tree into sysctl call 888 */ 889 static int 890 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS) 891 { 892 struct thread *td = req->td; 893 struct ucred *ucred; 894 struct smb_cred scred; 895 struct smb_connobj *scp1, *scp2; 896 struct smb_vc *vcp; 897 struct smb_share *ssp; 898 struct smb_vc_info vci; 899 struct smb_share_info ssi; 900 int error, itype; 901 902 KKASSERT(td->td_proc); 903 ucred = td->td_proc->p_ucred; 904 905 smb_makescred(&scred, td, ucred); 906 error = smb_sm_lockvclist(LK_SHARED); 907 if (error) 908 return error; 909 SMBCO_FOREACH(scp1, &smb_vclist) { 910 vcp = (struct smb_vc *)scp1; 911 error = smb_vc_lock(vcp, LK_SHARED); 912 if (error) 913 continue; 914 smb_vc_getinfo(vcp, &vci); 915 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info)); 916 if (error) { 917 smb_vc_unlock(vcp, 0); 918 break; 919 } 920 SMBCO_FOREACH(scp2, VCTOCP(vcp)) { 921 ssp = (struct smb_share *)scp2; 922 error = smb_share_lock(ssp, LK_SHARED); 923 if (error) { 924 error = 0; 925 continue; 926 } 927 smb_share_getinfo(ssp, &ssi); 928 smb_share_unlock(ssp, 0); 929 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info)); 930 if (error) 931 break; 932 } 933 smb_vc_unlock(vcp, 0); 934 if (error) 935 break; 936 } 937 if (!error) { 938 itype = SMB_INFO_NONE; 939 error = SYSCTL_OUT(req, &itype, sizeof(itype)); 940 } 941 smb_sm_unlockvclist(); 942 return error; 943 } 944