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sys/netsmb/smb_conn.c
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1 /* $NetBSD: smb_conn.c,v 1.17 2004/06/24 16:45:47 drochner Exp $ */ 2 3 /* 4 * Copyright (c) 2000-2001 Boris Popov 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Boris Popov. 18 * 4. Neither the name of the author nor the names of any co-contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * FreeBSD: src/sys/netsmb/smb_conn.c,v 1.3 2001/12/02 08:47:29 bp Exp 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: smb_conn.c,v 1.17 2004/06/24 16:45:47 drochner Exp $"); 39 40 /* 41 * Connection engine. 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/malloc.h> 48 #include <sys/proc.h> 49 #include <sys/lock.h> 50 #include <sys/sysctl.h> 51 #include <sys/mbuf.h> /* for M_SONAME */ 52 53 #include <netsmb/iconv.h> 54 55 #include <netsmb/smb.h> 56 #include <netsmb/smb_subr.h> 57 #include <netsmb/smb_conn.h> 58 #include <netsmb/smb_tran.h> 59 #include <netsmb/smb_trantcp.h> 60 61 static struct smb_connobj smb_vclist; 62 static int smb_vcnext = 1; /* next unique id for VC */ 63 64 #ifndef __NetBSD__ 65 SYSCTL_NODE(_net, OID_AUTO, smb, CTLFLAG_RW, NULL, "SMB protocol"); 66 #endif 67 68 MALLOC_DEFINE(M_SMBCONN, "SMB conn", "SMB connection"); 69 70 static void smb_co_init(struct smb_connobj *cp, int level, const char *objname); 71 static void smb_co_done(struct smb_connobj *cp); 72 #ifdef DIAGNOSTIC 73 static int smb_co_lockstatus(struct smb_connobj *cp); 74 #endif 75 76 static int smb_vc_disconnect(struct smb_vc *vcp); 77 static void smb_vc_free(struct smb_connobj *cp); 78 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred); 79 static smb_co_free_t smb_share_free; 80 static smb_co_gone_t smb_share_gone; 81 82 #ifndef __NetBSD__ 83 static int smb_sysctl_treedump(SYSCTL_HANDLER_ARGS); 84 85 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE, 86 NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree"); 87 #endif 88 89 int 90 smb_sm_init(void) 91 { 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 #ifdef DIAGNOSTIC 104 if (smb_vclist.co_usecount > 1) 105 panic("%d connections still active\n", smb_vclist.co_usecount - 1); 106 #endif 107 smb_co_done(&smb_vclist); 108 return 0; 109 } 110 111 static int 112 smb_sm_lockvclist(int flags) 113 { 114 115 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE); 116 } 117 118 static void 119 smb_sm_unlockvclist(void) 120 { 121 122 smb_co_unlock(&smb_vclist, LK_RELEASE); 123 } 124 125 static int 126 smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 127 struct smb_cred *scred, struct smb_vc **vcpp) 128 { 129 struct smb_connobj *ocp; 130 int exact = 1; 131 int fail = 1; 132 133 vcspec->shspec = shspec; 134 SMBCO_FOREACH(ocp, &smb_vclist) { 135 struct smb_vc *vcp = (struct smb_vc *)ocp; 136 137 if (smb_vc_lock(vcp, LK_EXCLUSIVE) != 0) 138 continue; 139 140 do { 141 if ((ocp->co_flags & SMBV_PRIVATE) || 142 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) || 143 strcmp(vcp->vc_username, vcspec->username) != 0) 144 break; 145 146 if (vcspec->owner != SMBM_ANY_OWNER) { 147 if (vcp->vc_uid != vcspec->owner) 148 break; 149 } else 150 exact = 0; 151 if (vcspec->group != SMBM_ANY_GROUP) { 152 if (vcp->vc_grp != vcspec->group) 153 break; 154 } else 155 exact = 0; 156 157 if (vcspec->mode & SMBM_EXACT) { 158 if (!exact || 159 (vcspec->mode & SMBM_MASK) != vcp->vc_mode) 160 break; 161 } 162 if (smb_vc_access(vcp, scred, vcspec->mode) != 0) 163 break; 164 vcspec->ssp = NULL; 165 if (shspec 166 &&smb_vc_lookupshare(vcp, shspec, scred, &vcspec->ssp) != 0) 167 break; 168 169 /* if we get here, all checks succeeded */ 170 smb_vc_ref(vcp); 171 *vcpp = vcp; 172 fail = 0; 173 goto out; 174 } while(0); 175 176 smb_vc_unlock(vcp, 0); 177 } 178 179 out: 180 return fail; 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 fail, error; 190 191 *vcpp = vcp = NULL; 192 193 error = smb_sm_lockvclist(LK_EXCLUSIVE); 194 if (error) 195 return error; 196 fail = smb_sm_lookupint(vcspec, shspec, scred, vcpp); 197 if (!fail || (vcspec->flags & SMBV_CREATE) == 0) { 198 smb_sm_unlockvclist(); 199 return 0; 200 } 201 fail = smb_sm_lookupint(vcspec, NULL, scred, &vcp); 202 if (fail) { 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, const char *objname) 234 { 235 SLIST_INIT(&cp->co_children); 236 smb_sl_init(&cp->co_interlock, objname); 237 lockinit(&cp->co_lock, PZERO, objname, 0, 0); 238 cp->co_level = level; 239 cp->co_usecount = 1; 240 KASSERT(smb_co_lock(cp, LK_EXCLUSIVE) == 0); 241 } 242 243 static void 244 smb_co_done(struct smb_connobj *cp) 245 { 246 smb_sl_destroy(&cp->co_interlock); 247 #ifdef __NetBSD__ 248 lockmgr(&cp->co_lock, LK_DRAIN, NULL); 249 #else 250 lockdestroy(&cp->co_lock); 251 #endif 252 } 253 254 static void 255 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred) 256 { 257 struct smb_connobj *parent; 258 259 if (cp->co_gone) 260 cp->co_gone(cp, scred); 261 parent = cp->co_parent; 262 if (parent) { 263 smb_co_lock(parent, LK_EXCLUSIVE|LK_CANRECURSE); 264 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next); 265 smb_co_put(parent, scred); 266 } 267 if (cp->co_free) 268 cp->co_free(cp); 269 } 270 271 void 272 smb_co_ref(struct smb_connobj *cp) 273 { 274 275 SMB_CO_LOCK(cp); 276 cp->co_usecount++; 277 SMB_CO_UNLOCK(cp); 278 } 279 280 void 281 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred) 282 { 283 SMB_CO_LOCK(cp); 284 lockmgr(&cp->co_lock, LK_RELEASE, NULL); 285 if (cp->co_usecount > 1) { 286 cp->co_usecount--; 287 SMB_CO_UNLOCK(cp); 288 return; 289 } 290 #ifdef DIAGNOSTIC 291 if (cp->co_usecount == 0) 292 panic("negative use_count for object %d", cp->co_level); 293 #endif 294 cp->co_usecount--; 295 cp->co_flags |= SMBO_GONE; 296 SMB_CO_UNLOCK(cp); 297 298 smb_co_gone(cp, scred); 299 } 300 301 int 302 smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred) 303 { 304 int error; 305 306 if ((flags & LK_INTERLOCK) == 0) 307 SMB_CO_LOCK(cp); 308 cp->co_usecount++; 309 error = smb_co_lock(cp, flags | LK_INTERLOCK); 310 if (error) { 311 SMB_CO_LOCK(cp); 312 cp->co_usecount--; 313 SMB_CO_UNLOCK(cp); 314 return error; 315 } 316 return 0; 317 } 318 319 void 320 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred) 321 { 322 323 SMB_CO_LOCK(cp); 324 if (cp->co_usecount > 1) { 325 cp->co_usecount--; 326 } else if (cp->co_usecount == 1) { 327 cp->co_usecount--; 328 cp->co_flags |= SMBO_GONE; 329 } 330 #ifdef DIAGNOSTIC 331 else 332 panic("smb_co_put: negative usecount"); 333 #endif 334 lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock); 335 if ((cp->co_flags & SMBO_GONE) == 0) 336 return; 337 smb_co_gone(cp, scred); 338 } 339 340 #ifdef DIAGNOSTIC 341 int 342 smb_co_lockstatus(struct smb_connobj *cp) 343 { 344 return lockstatus(&cp->co_lock); 345 } 346 #endif 347 348 int 349 smb_co_lock(struct smb_connobj *cp, int flags) 350 { 351 352 if (cp->co_flags & SMBO_GONE) 353 return EINVAL; 354 if ((flags & LK_TYPE_MASK) == 0) 355 flags |= LK_EXCLUSIVE; 356 return lockmgr(&cp->co_lock, flags, &cp->co_interlock); 357 } 358 359 void 360 smb_co_unlock(struct smb_connobj *cp, int flags) 361 { 362 (void)lockmgr(&cp->co_lock, flags | LK_RELEASE, &cp->co_interlock); 363 } 364 365 static void 366 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child) 367 { 368 KASSERT(smb_co_lockstatus(parent) == LK_EXCLUSIVE); 369 KASSERT(smb_co_lockstatus(child) == LK_EXCLUSIVE); 370 371 smb_co_ref(parent); 372 SLIST_INSERT_HEAD(&parent->co_children, child, co_next); 373 child->co_parent = parent; 374 } 375 376 /* 377 * Session implementation 378 */ 379 380 int 381 smb_vc_create(struct smb_vcspec *vcspec, 382 struct smb_cred *scred, struct smb_vc **vcpp) 383 { 384 struct smb_vc *vcp; 385 struct ucred *cred = scred->scr_cred; 386 uid_t uid = vcspec->owner; 387 gid_t gid = vcspec->group; 388 uid_t realuid = cred->cr_uid; 389 char *domain = vcspec->domain; 390 int error, isroot; 391 392 isroot = (smb_suser(cred) == 0); 393 /* 394 * Only superuser can create VCs with different uid and gid 395 */ 396 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 397 return EPERM; 398 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 399 return EPERM; 400 401 vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK); 402 smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc"); 403 vcp->obj.co_free = smb_vc_free; 404 vcp->obj.co_gone = smb_vc_gone; 405 vcp->vc_number = smb_vcnext++; 406 vcp->vc_smbuid = SMB_UID_UNKNOWN; 407 vcp->vc_mode = vcspec->rights & SMBM_MASK; 408 vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE); 409 vcp->vc_tdesc = &smb_tran_nbtcp_desc; 410 411 if (uid == SMBM_ANY_OWNER) 412 uid = realuid; 413 if (gid == SMBM_ANY_GROUP) 414 gid = cred->cr_groups[0]; 415 vcp->vc_uid = uid; 416 vcp->vc_grp = gid; 417 418 smb_sl_init(&vcp->vc_stlock, "vcstlock"); 419 error = ENOMEM; 420 if ((vcp->vc_paddr = dup_sockaddr(vcspec->sap, 1)) == NULL) 421 goto fail; 422 423 if ((vcp->vc_laddr = dup_sockaddr(vcspec->lap, 1)) == NULL) 424 goto fail; 425 426 if ((vcp->vc_pass = smb_strdup(vcspec->pass)) == NULL) 427 goto fail; 428 429 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain : "NODOMAIN"); 430 if (vcp->vc_domain == NULL) 431 goto fail; 432 433 if ((vcp->vc_srvname = smb_strdup(vcspec->srvname)) == NULL) 434 goto fail; 435 436 if ((vcp->vc_username = smb_strdup(vcspec->username)) == NULL) 437 goto fail; 438 439 #define ithrow(cmd) \ 440 if ((error = cmd)) \ 441 goto fail 442 443 ithrow(iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower)); 444 ithrow(iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper)); 445 if (vcspec->servercs[0]) { 446 ithrow(iconv_open(vcspec->servercs, vcspec->localcs, 447 &vcp->vc_toserver)); 448 ithrow(iconv_open(vcspec->localcs, vcspec->servercs, 449 &vcp->vc_tolocal)); 450 } 451 452 ithrow(smb_iod_create(vcp)); 453 454 #undef ithrow 455 456 /* all is well, return success */ 457 *vcpp = vcp; 458 smb_co_addchild(&smb_vclist, VCTOCP(vcp)); 459 460 return 0; 461 462 fail: 463 smb_vc_put(vcp, scred); 464 return (error); 465 466 } 467 468 static void 469 smb_vc_free(struct smb_connobj *cp) 470 { 471 struct smb_vc *vcp = CPTOVC(cp); 472 473 if (vcp->vc_iod) 474 smb_iod_destroy(vcp->vc_iod); 475 SMB_STRFREE(vcp->vc_username); 476 SMB_STRFREE(vcp->vc_srvname); 477 SMB_STRFREE(vcp->vc_pass); 478 SMB_STRFREE(vcp->vc_domain); 479 if (vcp->vc_paddr) 480 free(vcp->vc_paddr, M_SONAME); 481 if (vcp->vc_laddr) 482 free(vcp->vc_laddr, M_SONAME); 483 if (vcp->vc_tolower) 484 iconv_close(vcp->vc_tolower); 485 if (vcp->vc_toupper) 486 iconv_close(vcp->vc_toupper); 487 if (vcp->vc_tolocal) 488 iconv_close(vcp->vc_tolocal); 489 if (vcp->vc_toserver) 490 iconv_close(vcp->vc_toserver); 491 smb_co_done(VCTOCP(vcp)); 492 smb_sl_destroy(&vcp->vc_stlock); 493 free(vcp, M_SMBCONN); 494 } 495 496 /* 497 * Called when use count of VC dropped to zero. 498 * VC should be locked on enter with LK_DRAIN. 499 */ 500 static void 501 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred) 502 { 503 struct smb_vc *vcp = CPTOVC(cp); 504 505 smb_vc_disconnect(vcp); 506 } 507 508 void 509 smb_vc_ref(struct smb_vc *vcp) 510 { 511 smb_co_ref(VCTOCP(vcp)); 512 } 513 514 void 515 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred) 516 { 517 smb_co_rele(VCTOCP(vcp), scred); 518 } 519 520 int 521 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred) 522 { 523 return smb_co_get(VCTOCP(vcp), flags, scred); 524 } 525 526 void 527 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred) 528 { 529 smb_co_put(VCTOCP(vcp), scred); 530 } 531 532 int 533 smb_vc_lock(struct smb_vc *vcp, int flags) 534 { 535 return smb_co_lock(VCTOCP(vcp), flags); 536 } 537 538 void 539 smb_vc_unlock(struct smb_vc *vcp, int flags) 540 { 541 smb_co_unlock(VCTOCP(vcp), flags); 542 } 543 544 int 545 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode) 546 { 547 struct ucred *cred = scred->scr_cred; 548 549 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid) 550 return 0; 551 mode >>= 3; 552 if (!groupmember(vcp->vc_grp, cred)) 553 mode >>= 3; 554 return (vcp->vc_mode & mode) == mode ? 0 : EACCES; 555 } 556 557 static int 558 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp) 559 { 560 int exact = 1; 561 562 if (strcmp(ssp->ss_name, dp->name) != 0) 563 return 1; 564 if (dp->owner != SMBM_ANY_OWNER) { 565 if (ssp->ss_uid != dp->owner) 566 return 1; 567 } else 568 exact = 0; 569 if (dp->group != SMBM_ANY_GROUP) { 570 if (ssp->ss_grp != dp->group) 571 return 1; 572 } else 573 exact = 0; 574 575 if (dp->mode & SMBM_EXACT) { 576 if (!exact) 577 return 1; 578 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1; 579 } 580 if (smb_share_access(ssp, dp->scred, dp->mode) != 0) 581 return 1; 582 return 0; 583 } 584 585 /* 586 * Lookup share in the given VC. Share referenced and locked on return. 587 * VC expected to be locked on entry and will be left locked on exit. 588 */ 589 int 590 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp, 591 struct smb_cred *scred, struct smb_share **sspp) 592 { 593 struct smb_connobj *osp; 594 struct smb_share *ssp = NULL; 595 int error; 596 597 *sspp = NULL; 598 dp->scred = scred; 599 SMBCO_FOREACH(osp, VCTOCP(vcp)) { 600 ssp = (struct smb_share *)osp; 601 error = smb_share_lock(ssp, LK_EXCLUSIVE); 602 if (error) 603 continue; 604 if (smb_vc_cmpshare(ssp, dp) == 0) 605 break; 606 smb_share_unlock(ssp, 0); 607 } 608 if (ssp) { 609 smb_share_ref(ssp); 610 *sspp = ssp; 611 error = 0; 612 } else 613 error = ENOENT; 614 return error; 615 } 616 617 int 618 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 619 { 620 621 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 622 } 623 624 /* 625 * Destroy VC to server, invalidate shares linked with it. 626 * Transport should be locked on entry. 627 */ 628 int 629 smb_vc_disconnect(struct smb_vc *vcp) 630 { 631 632 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 633 return 0; 634 } 635 636 static const char * const smb_emptypass = ""; 637 638 const char * 639 smb_vc_getpass(struct smb_vc *vcp) 640 { 641 if (vcp->vc_pass) 642 return vcp->vc_pass; 643 return smb_emptypass; 644 } 645 646 #ifndef __NetBSD__ 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 #endif 665 666 u_short 667 smb_vc_nextmid(struct smb_vc *vcp) 668 { 669 u_short r; 670 671 SMB_CO_LOCK(&vcp->obj); 672 r = vcp->vc_mid++; 673 SMB_CO_UNLOCK(&vcp->obj); 674 return r; 675 } 676 677 /* 678 * Share implementation 679 */ 680 /* 681 * Allocate share structure and attach it to the given VC 682 * Connection expected to be locked on entry. Share will be returned 683 * in locked state. 684 */ 685 int 686 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 687 struct smb_cred *scred, struct smb_share **sspp) 688 { 689 struct smb_share *ssp; 690 struct ucred *cred = scred->scr_cred; 691 uid_t realuid = cred->cr_uid; 692 uid_t uid = shspec->owner; 693 gid_t gid = shspec->group; 694 int error, isroot; 695 696 isroot = smb_suser(cred) == 0; 697 /* 698 * Only superuser can create shares with different uid and gid 699 */ 700 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 701 return EPERM; 702 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 703 return EPERM; 704 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp); 705 if (!error) { 706 smb_share_put(ssp, scred); 707 return EEXIST; 708 } 709 if (uid == SMBM_ANY_OWNER) 710 uid = realuid; 711 if (gid == SMBM_ANY_GROUP) 712 gid = cred->cr_groups[0]; 713 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK); 714 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss"); 715 ssp->obj.co_free = smb_share_free; 716 ssp->obj.co_gone = smb_share_gone; 717 smb_sl_init(&ssp->ss_stlock, "ssstlock"); 718 ssp->ss_name = smb_strdup(shspec->name); 719 if (shspec->pass && shspec->pass[0]) 720 ssp->ss_pass = smb_strdup(shspec->pass); 721 ssp->ss_type = shspec->stype; 722 ssp->ss_tid = SMB_TID_UNKNOWN; 723 ssp->ss_uid = uid; 724 ssp->ss_grp = gid; 725 ssp->ss_mode = shspec->rights & SMBM_MASK; 726 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp)); 727 *sspp = ssp; 728 return 0; 729 } 730 731 static void 732 smb_share_free(struct smb_connobj *cp) 733 { 734 struct smb_share *ssp = CPTOSS(cp); 735 736 SMB_STRFREE(ssp->ss_name); 737 SMB_STRFREE(ssp->ss_pass); 738 smb_sl_destroy(&ssp->ss_stlock); 739 smb_co_done(SSTOCP(ssp)); 740 free(ssp, M_SMBCONN); 741 } 742 743 static void 744 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred) 745 { 746 struct smb_share *ssp = CPTOSS(cp); 747 748 smb_smb_treedisconnect(ssp, scred); 749 } 750 751 void 752 smb_share_ref(struct smb_share *ssp) 753 { 754 smb_co_ref(SSTOCP(ssp)); 755 } 756 757 void 758 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred) 759 { 760 smb_co_rele(SSTOCP(ssp), scred); 761 } 762 763 int 764 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred) 765 { 766 return smb_co_get(SSTOCP(ssp), flags, scred); 767 } 768 769 void 770 smb_share_put(struct smb_share *ssp, struct smb_cred *scred) 771 { 772 smb_co_put(SSTOCP(ssp), scred); 773 } 774 775 int 776 smb_share_lock(struct smb_share *ssp, int flags) 777 { 778 return smb_co_lock(SSTOCP(ssp), flags); 779 } 780 781 void 782 smb_share_unlock(struct smb_share *ssp, int flags) 783 { 784 smb_co_unlock(SSTOCP(ssp), flags); 785 } 786 787 int 788 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode) 789 { 790 struct ucred *cred = scred->scr_cred; 791 792 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid) 793 return 0; 794 mode >>= 3; 795 if (!groupmember(ssp->ss_grp, cred)) 796 mode >>= 3; 797 return (ssp->ss_mode & mode) == mode ? 0 : EACCES; 798 } 799 800 int 801 smb_share_valid(struct smb_share *ssp) 802 { 803 return ssp->ss_tid != SMB_TID_UNKNOWN && 804 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid; 805 } 806 807 const char* 808 smb_share_getpass(struct smb_share *ssp) 809 { 810 struct smb_vc *vcp; 811 812 if (ssp->ss_pass) 813 return ssp->ss_pass; 814 vcp = SSTOVC(ssp); 815 if (vcp->vc_pass) 816 return vcp->vc_pass; 817 return smb_emptypass; 818 } 819 820 #ifndef __NetBSD__ 821 static int 822 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip) 823 { 824 bzero(sip, sizeof(struct smb_share_info)); 825 sip->itype = SMB_INFO_SHARE; 826 sip->usecount = ssp->obj.co_usecount; 827 sip->tid = ssp->ss_tid; 828 sip->type= ssp->ss_type; 829 sip->uid = ssp->ss_uid; 830 sip->gid = ssp->ss_grp; 831 sip->mode= ssp->ss_mode; 832 sip->flags = ssp->obj.co_flags; 833 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name); 834 return 0; 835 } 836 #endif 837 838 #ifndef __NetBSD__ 839 /* 840 * Dump an entire tree into sysctl call 841 */ 842 static int 843 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS) 844 { 845 struct smb_cred scred; 846 struct smb_vc *vcp; 847 struct smb_share *ssp; 848 struct smb_vc_info vci; 849 struct smb_share_info ssi; 850 int error, itype; 851 852 smb_makescred(&scred, td, td->td_proc->p_ucred); 853 error = smb_sm_lockvclist(LK_SHARED); 854 if (error) 855 return error; 856 SMBCO_FOREACH((struct smb_connobj*)vcp, &smb_vclist) { 857 error = smb_vc_lock(vcp, LK_SHARED); 858 if (error) 859 continue; 860 smb_vc_getinfo(vcp, &vci); 861 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info)); 862 if (error) { 863 smb_vc_unlock(vcp, 0); 864 break; 865 } 866 SMBCO_FOREACH((struct smb_connobj*)ssp, VCTOCP(vcp)) { 867 error = smb_share_lock(ssp, LK_SHARED); 868 if (error) { 869 error = 0; 870 continue; 871 } 872 smb_share_getinfo(ssp, &ssi); 873 smb_share_unlock(ssp, 0); 874 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info)); 875 if (error) 876 break; 877 } 878 smb_vc_unlock(vcp, 0); 879 if (error) 880 break; 881 } 882 if (!error) { 883 itype = SMB_INFO_NONE; 884 error = SYSCTL_OUT(req, &itype, sizeof(itype)); 885 } 886 smb_sm_unlockvclist(); 887 return error; 888 } 889 #endif
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