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sys/netsmb/smb_conn.c
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1 /* $NetBSD: smb_conn.c,v 1.15 2004/03/21 10:09:52 jdolecek 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 1.15 2004/03/21 10:09:52 jdolecek 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_vc *vcp; 130 int exact = 1; 131 int fail = 1; 132 133 vcspec->shspec = shspec; 134 SMBCO_FOREACH((struct smb_connobj*)vcp, &smb_vclist) { 135 if (smb_vc_lock(vcp, LK_EXCLUSIVE) != 0) 136 continue; 137 138 do { 139 if ((vcp->obj.co_flags & SMBV_PRIVATE) || 140 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) || 141 strcmp(vcp->vc_username, vcspec->username) != 0) 142 break; 143 144 if (vcspec->owner != SMBM_ANY_OWNER) { 145 if (vcp->vc_uid != vcspec->owner) 146 break; 147 } else 148 exact = 0; 149 if (vcspec->group != SMBM_ANY_GROUP) { 150 if (vcp->vc_grp != vcspec->group) 151 break; 152 } else 153 exact = 0; 154 155 if (vcspec->mode & SMBM_EXACT) { 156 if (!exact || 157 (vcspec->mode & SMBM_MASK) != vcp->vc_mode) 158 break; 159 } 160 if (smb_vc_access(vcp, scred, vcspec->mode) != 0) 161 break; 162 vcspec->ssp = NULL; 163 if (shspec 164 &&smb_vc_lookupshare(vcp, shspec, scred, &vcspec->ssp) != 0) 165 break; 166 167 /* if we get here, all checks succeeded */ 168 smb_vc_ref(vcp); 169 *vcpp = vcp; 170 fail = 0; 171 goto out; 172 } while(0); 173 174 smb_vc_unlock(vcp, 0); 175 } 176 177 out: 178 return fail; 179 } 180 181 int 182 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 183 struct smb_cred *scred, struct smb_vc **vcpp) 184 { 185 struct smb_vc *vcp; 186 struct smb_share *ssp = NULL; 187 int fail, error; 188 189 *vcpp = vcp = NULL; 190 191 error = smb_sm_lockvclist(LK_EXCLUSIVE); 192 if (error) 193 return error; 194 fail = smb_sm_lookupint(vcspec, shspec, scred, vcpp); 195 if (!fail || (vcspec->flags & SMBV_CREATE) == 0) { 196 smb_sm_unlockvclist(); 197 return 0; 198 } 199 fail = smb_sm_lookupint(vcspec, NULL, scred, &vcp); 200 if (fail) { 201 error = smb_vc_create(vcspec, scred, &vcp); 202 if (error) 203 goto out; 204 error = smb_vc_connect(vcp, scred); 205 if (error) 206 goto out; 207 } 208 if (shspec == NULL) 209 goto out; 210 error = smb_share_create(vcp, shspec, scred, &ssp); 211 if (error) 212 goto out; 213 error = smb_smb_treeconnect(ssp, scred); 214 if (error == 0) 215 vcspec->ssp = ssp; 216 else 217 smb_share_put(ssp, scred); 218 out: 219 smb_sm_unlockvclist(); 220 if (error == 0) 221 *vcpp = vcp; 222 else if (vcp) 223 smb_vc_put(vcp, scred); 224 return error; 225 } 226 227 /* 228 * Common code for connection object 229 */ 230 static void 231 smb_co_init(struct smb_connobj *cp, int level, const char *objname) 232 { 233 SLIST_INIT(&cp->co_children); 234 smb_sl_init(&cp->co_interlock, objname); 235 lockinit(&cp->co_lock, PZERO, objname, 0, 0); 236 cp->co_level = level; 237 cp->co_usecount = 1; 238 KASSERT(smb_co_lock(cp, LK_EXCLUSIVE) == 0); 239 } 240 241 static void 242 smb_co_done(struct smb_connobj *cp) 243 { 244 smb_sl_destroy(&cp->co_interlock); 245 #ifdef __NetBSD__ 246 lockmgr(&cp->co_lock, LK_DRAIN, NULL); 247 #else 248 lockdestroy(&cp->co_lock); 249 #endif 250 } 251 252 static void 253 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred) 254 { 255 struct smb_connobj *parent; 256 257 if (cp->co_gone) 258 cp->co_gone(cp, scred); 259 parent = cp->co_parent; 260 if (parent) { 261 smb_co_lock(parent, LK_EXCLUSIVE|LK_CANRECURSE); 262 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next); 263 smb_co_put(parent, scred); 264 } 265 if (cp->co_free) 266 cp->co_free(cp); 267 } 268 269 void 270 smb_co_ref(struct smb_connobj *cp) 271 { 272 273 SMB_CO_LOCK(cp); 274 cp->co_usecount++; 275 SMB_CO_UNLOCK(cp); 276 } 277 278 void 279 smb_co_rele(struct smb_connobj *cp, struct smb_cred *scred) 280 { 281 SMB_CO_LOCK(cp); 282 lockmgr(&cp->co_lock, LK_RELEASE, NULL); 283 if (cp->co_usecount > 1) { 284 cp->co_usecount--; 285 SMB_CO_UNLOCK(cp); 286 return; 287 } 288 #ifdef DIAGNOSTIC 289 if (cp->co_usecount == 0) 290 panic("negative use_count for object %d", cp->co_level); 291 #endif 292 cp->co_usecount--; 293 cp->co_flags |= SMBO_GONE; 294 SMB_CO_UNLOCK(cp); 295 296 smb_co_gone(cp, scred); 297 } 298 299 int 300 smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred) 301 { 302 int error; 303 304 if ((flags & LK_INTERLOCK) == 0) 305 SMB_CO_LOCK(cp); 306 cp->co_usecount++; 307 error = smb_co_lock(cp, flags | LK_INTERLOCK); 308 if (error) { 309 SMB_CO_LOCK(cp); 310 cp->co_usecount--; 311 SMB_CO_UNLOCK(cp); 312 return error; 313 } 314 return 0; 315 } 316 317 void 318 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred) 319 { 320 321 SMB_CO_LOCK(cp); 322 if (cp->co_usecount > 1) { 323 cp->co_usecount--; 324 } else if (cp->co_usecount == 1) { 325 cp->co_usecount--; 326 cp->co_flags |= SMBO_GONE; 327 } 328 #ifdef DIAGNOSTIC 329 else 330 panic("smb_co_put: negative usecount"); 331 #endif 332 lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock); 333 if ((cp->co_flags & SMBO_GONE) == 0) 334 return; 335 smb_co_gone(cp, scred); 336 } 337 338 #ifdef DIAGNOSTIC 339 int 340 smb_co_lockstatus(struct smb_connobj *cp) 341 { 342 return lockstatus(&cp->co_lock); 343 } 344 #endif 345 346 int 347 smb_co_lock(struct smb_connobj *cp, int flags) 348 { 349 350 if (cp->co_flags & SMBO_GONE) 351 return EINVAL; 352 if ((flags & LK_TYPE_MASK) == 0) 353 flags |= LK_EXCLUSIVE; 354 return lockmgr(&cp->co_lock, flags, &cp->co_interlock); 355 } 356 357 void 358 smb_co_unlock(struct smb_connobj *cp, int flags) 359 { 360 (void)lockmgr(&cp->co_lock, flags | LK_RELEASE, &cp->co_interlock); 361 } 362 363 static void 364 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child) 365 { 366 KASSERT(smb_co_lockstatus(parent) == LK_EXCLUSIVE); 367 KASSERT(smb_co_lockstatus(child) == LK_EXCLUSIVE); 368 369 smb_co_ref(parent); 370 SLIST_INSERT_HEAD(&parent->co_children, child, co_next); 371 child->co_parent = parent; 372 } 373 374 /* 375 * Session implementation 376 */ 377 378 int 379 smb_vc_create(struct smb_vcspec *vcspec, 380 struct smb_cred *scred, struct smb_vc **vcpp) 381 { 382 struct smb_vc *vcp; 383 struct ucred *cred = scred->scr_cred; 384 uid_t uid = vcspec->owner; 385 gid_t gid = vcspec->group; 386 uid_t realuid = cred->cr_uid; 387 char *domain = vcspec->domain; 388 int error, isroot; 389 390 isroot = (smb_suser(cred) == 0); 391 /* 392 * Only superuser can create VCs with different uid and gid 393 */ 394 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 395 return EPERM; 396 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 397 return EPERM; 398 399 vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK); 400 smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc"); 401 vcp->obj.co_free = smb_vc_free; 402 vcp->obj.co_gone = smb_vc_gone; 403 vcp->vc_number = smb_vcnext++; 404 vcp->vc_smbuid = SMB_UID_UNKNOWN; 405 vcp->vc_mode = vcspec->rights & SMBM_MASK; 406 vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE); 407 vcp->vc_tdesc = &smb_tran_nbtcp_desc; 408 409 if (uid == SMBM_ANY_OWNER) 410 uid = realuid; 411 if (gid == SMBM_ANY_GROUP) 412 gid = cred->cr_groups[0]; 413 vcp->vc_uid = uid; 414 vcp->vc_grp = gid; 415 416 smb_sl_init(&vcp->vc_stlock, "vcstlock"); 417 error = ENOMEM; 418 if ((vcp->vc_paddr = dup_sockaddr(vcspec->sap, 1)) == NULL) 419 goto fail; 420 421 if ((vcp->vc_laddr = dup_sockaddr(vcspec->lap, 1)) == NULL) 422 goto fail; 423 424 if ((vcp->vc_pass = smb_strdup(vcspec->pass)) == NULL) 425 goto fail; 426 427 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain : "NODOMAIN"); 428 if (vcp->vc_domain == NULL) 429 goto fail; 430 431 if ((vcp->vc_srvname = smb_strdup(vcspec->srvname)) == NULL) 432 goto fail; 433 434 if ((vcp->vc_username = smb_strdup(vcspec->username)) == NULL) 435 goto fail; 436 437 #define ithrow(cmd) \ 438 if ((error = cmd)) \ 439 goto fail 440 441 ithrow(iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower)); 442 ithrow(iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper)); 443 if (vcspec->servercs[0]) { 444 ithrow(iconv_open(vcspec->servercs, vcspec->localcs, 445 &vcp->vc_toserver)); 446 ithrow(iconv_open(vcspec->localcs, vcspec->servercs, 447 &vcp->vc_tolocal)); 448 } 449 450 ithrow(smb_iod_create(vcp)); 451 452 #undef ithrow 453 454 /* all is well, return success */ 455 *vcpp = vcp; 456 smb_co_addchild(&smb_vclist, VCTOCP(vcp)); 457 458 return 0; 459 460 fail: 461 smb_vc_put(vcp, scred); 462 return (error); 463 464 } 465 466 static void 467 smb_vc_free(struct smb_connobj *cp) 468 { 469 struct smb_vc *vcp = CPTOVC(cp); 470 471 if (vcp->vc_iod) 472 smb_iod_destroy(vcp->vc_iod); 473 SMB_STRFREE(vcp->vc_username); 474 SMB_STRFREE(vcp->vc_srvname); 475 SMB_STRFREE(vcp->vc_pass); 476 SMB_STRFREE(vcp->vc_domain); 477 if (vcp->vc_paddr) 478 free(vcp->vc_paddr, M_SONAME); 479 if (vcp->vc_laddr) 480 free(vcp->vc_laddr, M_SONAME); 481 if (vcp->vc_tolower) 482 iconv_close(vcp->vc_tolower); 483 if (vcp->vc_toupper) 484 iconv_close(vcp->vc_toupper); 485 if (vcp->vc_tolocal) 486 iconv_close(vcp->vc_tolocal); 487 if (vcp->vc_toserver) 488 iconv_close(vcp->vc_toserver); 489 smb_co_done(VCTOCP(vcp)); 490 smb_sl_destroy(&vcp->vc_stlock); 491 free(vcp, M_SMBCONN); 492 } 493 494 /* 495 * Called when use count of VC dropped to zero. 496 * VC should be locked on enter with LK_DRAIN. 497 */ 498 static void 499 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred) 500 { 501 struct smb_vc *vcp = CPTOVC(cp); 502 503 smb_vc_disconnect(vcp); 504 } 505 506 void 507 smb_vc_ref(struct smb_vc *vcp) 508 { 509 smb_co_ref(VCTOCP(vcp)); 510 } 511 512 void 513 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred) 514 { 515 smb_co_rele(VCTOCP(vcp), scred); 516 } 517 518 int 519 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred) 520 { 521 return smb_co_get(VCTOCP(vcp), flags, scred); 522 } 523 524 void 525 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred) 526 { 527 smb_co_put(VCTOCP(vcp), scred); 528 } 529 530 int 531 smb_vc_lock(struct smb_vc *vcp, int flags) 532 { 533 return smb_co_lock(VCTOCP(vcp), flags); 534 } 535 536 void 537 smb_vc_unlock(struct smb_vc *vcp, int flags) 538 { 539 smb_co_unlock(VCTOCP(vcp), flags); 540 } 541 542 int 543 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode) 544 { 545 struct ucred *cred = scred->scr_cred; 546 547 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid) 548 return 0; 549 mode >>= 3; 550 if (!groupmember(vcp->vc_grp, cred)) 551 mode >>= 3; 552 return (vcp->vc_mode & mode) == mode ? 0 : EACCES; 553 } 554 555 static int 556 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp) 557 { 558 int exact = 1; 559 560 if (strcmp(ssp->ss_name, dp->name) != 0) 561 return 1; 562 if (dp->owner != SMBM_ANY_OWNER) { 563 if (ssp->ss_uid != dp->owner) 564 return 1; 565 } else 566 exact = 0; 567 if (dp->group != SMBM_ANY_GROUP) { 568 if (ssp->ss_grp != dp->group) 569 return 1; 570 } else 571 exact = 0; 572 573 if (dp->mode & SMBM_EXACT) { 574 if (!exact) 575 return 1; 576 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1; 577 } 578 if (smb_share_access(ssp, dp->scred, dp->mode) != 0) 579 return 1; 580 return 0; 581 } 582 583 /* 584 * Lookup share in the given VC. Share referenced and locked on return. 585 * VC expected to be locked on entry and will be left locked on exit. 586 */ 587 int 588 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp, 589 struct smb_cred *scred, struct smb_share **sspp) 590 { 591 struct smb_share *ssp = NULL; 592 int error; 593 594 *sspp = NULL; 595 dp->scred = scred; 596 SMBCO_FOREACH((struct smb_connobj*)ssp, VCTOCP(vcp)) { 597 error = smb_share_lock(ssp, LK_EXCLUSIVE); 598 if (error) 599 continue; 600 if (smb_vc_cmpshare(ssp, dp) == 0) 601 break; 602 smb_share_unlock(ssp, 0); 603 } 604 if (ssp) { 605 smb_share_ref(ssp); 606 *sspp = ssp; 607 error = 0; 608 } else 609 error = ENOENT; 610 return error; 611 } 612 613 int 614 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 615 { 616 617 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 618 } 619 620 /* 621 * Destroy VC to server, invalidate shares linked with it. 622 * Transport should be locked on entry. 623 */ 624 int 625 smb_vc_disconnect(struct smb_vc *vcp) 626 { 627 628 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 629 return 0; 630 } 631 632 static const char * const smb_emptypass = ""; 633 634 const char * 635 smb_vc_getpass(struct smb_vc *vcp) 636 { 637 if (vcp->vc_pass) 638 return vcp->vc_pass; 639 return smb_emptypass; 640 } 641 642 #ifndef __NetBSD__ 643 static int 644 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip) 645 { 646 bzero(vip, sizeof(struct smb_vc_info)); 647 vip->itype = SMB_INFO_VC; 648 vip->usecount = vcp->obj.co_usecount; 649 vip->uid = vcp->vc_uid; 650 vip->gid = vcp->vc_grp; 651 vip->mode = vcp->vc_mode; 652 vip->flags = vcp->obj.co_flags; 653 vip->sopt = vcp->vc_sopt; 654 vip->iodstate = vcp->vc_iod->iod_state; 655 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey)); 656 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname); 657 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username); 658 return 0; 659 } 660 #endif 661 662 u_short 663 smb_vc_nextmid(struct smb_vc *vcp) 664 { 665 u_short r; 666 667 SMB_CO_LOCK(&vcp->obj); 668 r = vcp->vc_mid++; 669 SMB_CO_UNLOCK(&vcp->obj); 670 return r; 671 } 672 673 /* 674 * Share implementation 675 */ 676 /* 677 * Allocate share structure and attach it to the given VC 678 * Connection expected to be locked on entry. Share will be returned 679 * in locked state. 680 */ 681 int 682 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 683 struct smb_cred *scred, struct smb_share **sspp) 684 { 685 struct smb_share *ssp; 686 struct ucred *cred = scred->scr_cred; 687 uid_t realuid = cred->cr_uid; 688 uid_t uid = shspec->owner; 689 gid_t gid = shspec->group; 690 int error, isroot; 691 692 isroot = smb_suser(cred) == 0; 693 /* 694 * Only superuser can create shares with different uid and gid 695 */ 696 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) { 697 printf("uid %d realuid %d isroot %d\n", uid, realuid, isroot); 698 return EPERM; 699 } 700 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) { 701 printf("gid %d groupmem %d isroot %d\n", uid, groupmember(gid, cred), isroot); 702 return EPERM; 703 } 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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