Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/netsmb/smb_conn.c
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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 33 /* 34 * Connection engine. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/malloc.h> 44 #include <sys/priv.h> 45 #include <sys/proc.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 <netsmb/smb.h> 53 #include <netsmb/smb_subr.h> 54 #include <netsmb/smb_conn.h> 55 #include <netsmb/smb_tran.h> 56 #include <netsmb/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 struct thread *td); 67 static void smb_co_done(struct smb_connobj *cp); 68 static int smb_co_lockstatus(struct smb_connobj *cp, struct thread *td); 69 70 static int smb_vc_disconnect(struct smb_vc *vcp); 71 static void smb_vc_free(struct smb_connobj *cp); 72 static void smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred); 73 static smb_co_free_t smb_share_free; 74 static smb_co_gone_t smb_share_gone; 75 76 static int smb_sysctl_treedump(SYSCTL_HANDLER_ARGS); 77 78 SYSCTL_PROC(_net_smb, OID_AUTO, treedump, CTLFLAG_RD | CTLTYPE_OPAQUE, 79 NULL, 0, smb_sysctl_treedump, "S,treedump", "Requester tree"); 80 81 int 82 smb_sm_init(void) 83 { 84 85 smb_co_init(&smb_vclist, SMBL_SM, "smbsm", curthread); 86 smb_co_unlock(&smb_vclist, 0, curthread); 87 return 0; 88 } 89 90 int 91 smb_sm_done(void) 92 { 93 94 /* XXX: hold the mutex */ 95 if (smb_vclist.co_usecount > 1) { 96 SMBERROR("%d connections still active\n", smb_vclist.co_usecount - 1); 97 return EBUSY; 98 } 99 lockmgr(&smb_vclist.co_lock, LK_DRAIN, 0, curthread); 100 smb_co_done(&smb_vclist); 101 return 0; 102 } 103 104 static int 105 smb_sm_lockvclist(int flags, struct thread *td) 106 { 107 108 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE, td); 109 } 110 111 static void 112 smb_sm_unlockvclist(struct thread *td) 113 { 114 115 smb_co_unlock(&smb_vclist, LK_RELEASE, td); 116 } 117 118 static int 119 smb_sm_lookupint(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 120 struct smb_cred *scred, struct smb_vc **vcpp) 121 { 122 struct thread *td = scred->scr_td; 123 struct smb_connobj *scp; 124 struct smb_vc *vcp; 125 int exact = 1; 126 int error; 127 128 vcspec->shspec = shspec; 129 error = ENOENT; 130 vcp = NULL; 131 SMBCO_FOREACH(scp, &smb_vclist) { 132 vcp = (struct smb_vc *)scp; 133 error = smb_vc_lock(vcp, LK_EXCLUSIVE, td); 134 if (error) 135 continue; 136 137 if ((vcp->obj.co_flags & SMBV_PRIVATE) || 138 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) || 139 strcmp(vcp->vc_username, vcspec->username) != 0) 140 goto err1; 141 if (vcspec->owner != SMBM_ANY_OWNER) { 142 if (vcp->vc_uid != vcspec->owner) 143 goto err1; 144 } else 145 exact = 0; 146 if (vcspec->group != SMBM_ANY_GROUP) { 147 if (vcp->vc_grp != vcspec->group) 148 goto err1; 149 } else 150 exact = 0; 151 if (vcspec->mode & SMBM_EXACT) { 152 if (!exact || (vcspec->mode & SMBM_MASK) != 153 vcp->vc_mode) 154 goto err1; 155 } 156 if (smb_vc_access(vcp, scred, vcspec->mode) != 0) 157 goto err1; 158 vcspec->ssp = NULL; 159 if (shspec) { 160 error = (int)smb_vc_lookupshare(vcp, shspec, scred, 161 &vcspec->ssp); 162 if (error) 163 goto fail; 164 } 165 error = 0; 166 break; 167 err1: 168 error = 1; 169 fail: 170 smb_vc_unlock(vcp, 0, td); 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 thread *td = scred->scr_td; 184 struct smb_vc *vcp; 185 struct smb_share *ssp = NULL; 186 int error; 187 188 *vcpp = vcp = NULL; 189 190 error = smb_sm_lockvclist(LK_EXCLUSIVE, td); 191 if (error) 192 return error; 193 error = smb_sm_lookupint(vcspec, shspec, scred, vcpp); 194 if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) { 195 smb_sm_unlockvclist(td); 196 return error; 197 } 198 error = smb_sm_lookupint(vcspec, NULL, scred, &vcp); 199 if (error) { 200 error = smb_vc_create(vcspec, scred, &vcp); 201 if (error) 202 goto out; 203 error = smb_vc_connect(vcp, scred); 204 if (error) 205 goto out; 206 } 207 if (shspec == NULL) 208 goto out; 209 error = smb_share_create(vcp, shspec, scred, &ssp); 210 if (error) 211 goto out; 212 error = smb_smb_treeconnect(ssp, scred); 213 if (error == 0) 214 vcspec->ssp = ssp; 215 else 216 smb_share_put(ssp, scred); 217 out: 218 smb_sm_unlockvclist(td); 219 if (error == 0) 220 *vcpp = vcp; 221 else if (vcp) 222 smb_vc_put(vcp, scred); 223 return error; 224 } 225 226 /* 227 * Common code for connection object 228 */ 229 static void 230 smb_co_init(struct smb_connobj *cp, int level, char *objname, struct thread *td) 231 { 232 SLIST_INIT(&cp->co_children); 233 smb_sl_init(&cp->co_interlock, objname); 234 lockinit(&cp->co_lock, PZERO, objname, 0, 0); 235 cp->co_level = level; 236 cp->co_usecount = 1; 237 if (smb_co_lock(cp, LK_EXCLUSIVE, td) != 0) 238 panic("smb_co_init: lock failed"); 239 } 240 241 static void 242 smb_co_done(struct smb_connobj *cp) 243 { 244 smb_sl_destroy(&cp->co_interlock); 245 lockmgr(&cp->co_lock, LK_RELEASE, 0, curthread); 246 lockdestroy(&cp->co_lock); 247 } 248 249 static void 250 smb_co_gone(struct smb_connobj *cp, struct smb_cred *scred) 251 { 252 struct smb_connobj *parent; 253 254 if (cp->co_gone) 255 cp->co_gone(cp, scred); 256 parent = cp->co_parent; 257 if (parent) { 258 smb_co_lock(parent, LK_EXCLUSIVE, scred->scr_td); 259 SLIST_REMOVE(&parent->co_children, cp, smb_connobj, co_next); 260 smb_co_put(parent, scred); 261 } 262 if (cp->co_free) 263 cp->co_free(cp); 264 } 265 266 void 267 smb_co_ref(struct smb_connobj *cp) 268 { 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 struct thread *td = scred->scr_td; 279 280 SMB_CO_LOCK(cp); 281 if (cp->co_usecount > 1) { 282 cp->co_usecount--; 283 SMB_CO_UNLOCK(cp); 284 return; 285 } 286 if (cp->co_usecount == 0) { 287 SMBERROR("negative use_count for object %d", cp->co_level); 288 SMB_CO_UNLOCK(cp); 289 return; 290 } 291 cp->co_usecount--; 292 cp->co_flags |= SMBO_GONE; 293 294 lockmgr(&cp->co_lock, LK_DRAIN | LK_INTERLOCK, &cp->co_interlock, td); 295 smb_co_gone(cp, scred); 296 } 297 298 int 299 smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred) 300 { 301 int error; 302 303 if ((flags & LK_INTERLOCK) == 0) 304 SMB_CO_LOCK(cp); 305 cp->co_usecount++; 306 error = smb_co_lock(cp, flags | LK_INTERLOCK, scred->scr_td); 307 if (error) { 308 SMB_CO_LOCK(cp); 309 cp->co_usecount--; 310 SMB_CO_UNLOCK(cp); 311 return error; 312 } 313 return 0; 314 } 315 316 void 317 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred) 318 { 319 struct thread *td = scred->scr_td; 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 } else { 328 SMBERROR("negative usecount"); 329 } 330 lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock, td); 331 if ((cp->co_flags & SMBO_GONE) == 0) 332 return; 333 lockmgr(&cp->co_lock, LK_DRAIN, NULL, td); 334 smb_co_gone(cp, scred); 335 } 336 337 int 338 smb_co_lockstatus(struct smb_connobj *cp, struct thread *td) 339 { 340 return lockstatus(&cp->co_lock, td); 341 } 342 343 int 344 smb_co_lock(struct smb_connobj *cp, int flags, struct thread *td) 345 { 346 347 if (cp->co_flags & SMBO_GONE) 348 return EINVAL; 349 if ((flags & LK_TYPE_MASK) == 0) 350 flags |= LK_EXCLUSIVE; 351 if (smb_co_lockstatus(cp, td) == LK_EXCLUSIVE && 352 (flags & LK_CANRECURSE) == 0) { 353 SMBERROR("recursive lock for object %d\n", cp->co_level); 354 return 0; 355 } 356 return lockmgr(&cp->co_lock, flags, &cp->co_interlock, td); 357 } 358 359 void 360 smb_co_unlock(struct smb_connobj *cp, int flags, struct thread *td) 361 { 362 (void)lockmgr(&cp->co_lock, flags | LK_RELEASE, &cp->co_interlock, td); 363 } 364 365 static void 366 smb_co_addchild(struct smb_connobj *parent, struct smb_connobj *child) 367 { 368 KASSERT(smb_co_lockstatus(parent, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: parent not locked")); 369 KASSERT(smb_co_lockstatus(child, curthread) == LK_EXCLUSIVE, ("smb_co_addchild: child not locked")); 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 thread *td = scred->scr_td; 386 struct ucred *cred = scred->scr_cred; 387 uid_t uid = vcspec->owner; 388 gid_t gid = vcspec->group; 389 uid_t realuid = cred->cr_uid; 390 char *domain = vcspec->domain; 391 int error, isroot; 392 393 isroot = smb_suser(cred) == 0; 394 /* 395 * Only superuser can create VCs with different uid and gid 396 */ 397 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 398 return EPERM; 399 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 400 return EPERM; 401 402 vcp = smb_zmalloc(sizeof(*vcp), M_SMBCONN, M_WAITOK); 403 smb_co_init(VCTOCP(vcp), SMBL_VC, "smb_vc", td); 404 vcp->obj.co_free = smb_vc_free; 405 vcp->obj.co_gone = smb_vc_gone; 406 vcp->vc_number = smb_vcnext++; 407 vcp->vc_timo = SMB_DEFRQTIMO; 408 vcp->vc_smbuid = SMB_UID_UNKNOWN; 409 vcp->vc_mode = vcspec->rights & SMBM_MASK; 410 vcp->obj.co_flags = vcspec->flags & (SMBV_PRIVATE | SMBV_SINGLESHARE); 411 vcp->vc_tdesc = &smb_tran_nbtcp_desc; 412 vcp->vc_seqno = 0; 413 vcp->vc_mackey = NULL; 414 vcp->vc_mackeylen = 0; 415 416 if (uid == SMBM_ANY_OWNER) 417 uid = realuid; 418 if (gid == SMBM_ANY_GROUP) 419 gid = cred->cr_groups[0]; 420 vcp->vc_uid = uid; 421 vcp->vc_grp = gid; 422 423 smb_sl_init(&vcp->vc_stlock, "vcstlock"); 424 error = ENOMEM; 425 426 vcp->vc_paddr = sodupsockaddr(vcspec->sap, M_WAITOK); 427 if (vcp->vc_paddr == NULL) 428 goto fail; 429 vcp->vc_laddr = sodupsockaddr(vcspec->lap, M_WAITOK); 430 if (vcp->vc_laddr == NULL) 431 goto fail; 432 vcp->vc_pass = smb_strdup(vcspec->pass); 433 if (vcp->vc_pass == NULL) 434 goto fail; 435 vcp->vc_domain = smb_strdup((domain && domain[0]) ? domain : 436 "NODOMAIN"); 437 if (vcp->vc_domain == NULL) 438 goto fail; 439 vcp->vc_srvname = smb_strdup(vcspec->srvname); 440 if (vcp->vc_srvname == NULL) 441 goto fail; 442 vcp->vc_username = smb_strdup(vcspec->username); 443 if (vcp->vc_username == NULL) 444 goto fail; 445 error = (int)iconv_open("tolower", vcspec->localcs, &vcp->vc_tolower); 446 if (error) 447 goto fail; 448 error = (int)iconv_open("toupper", vcspec->localcs, &vcp->vc_toupper); 449 if (error) 450 goto fail; 451 if (vcspec->servercs[0]) { 452 error = (int)iconv_open(vcspec->servercs, vcspec->localcs, 453 &vcp->vc_toserver); 454 if (error) 455 goto fail; 456 error = (int)iconv_open(vcspec->localcs, vcspec->servercs, 457 &vcp->vc_tolocal); 458 if (error) 459 goto fail; 460 } 461 error = (int)smb_iod_create(vcp); 462 if (error) 463 goto fail; 464 *vcpp = vcp; 465 smb_co_addchild(&smb_vclist, VCTOCP(vcp)); 466 return (0); 467 468 fail: 469 smb_vc_put(vcp, scred); 470 return (error); 471 } 472 473 static void 474 smb_vc_free(struct smb_connobj *cp) 475 { 476 struct smb_vc *vcp = CPTOVC(cp); 477 478 if (vcp->vc_iod) 479 smb_iod_destroy(vcp->vc_iod); 480 SMB_STRFREE(vcp->vc_username); 481 SMB_STRFREE(vcp->vc_srvname); 482 SMB_STRFREE(vcp->vc_pass); 483 SMB_STRFREE(vcp->vc_domain); 484 if (vcp->vc_mackey) 485 free(vcp->vc_mackey, M_SMBTEMP); 486 if (vcp->vc_paddr) 487 free(vcp->vc_paddr, M_SONAME); 488 if (vcp->vc_laddr) 489 free(vcp->vc_laddr, M_SONAME); 490 if (vcp->vc_tolower) 491 iconv_close(vcp->vc_tolower); 492 if (vcp->vc_toupper) 493 iconv_close(vcp->vc_toupper); 494 if (vcp->vc_tolocal) 495 iconv_close(vcp->vc_tolocal); 496 if (vcp->vc_toserver) 497 iconv_close(vcp->vc_toserver); 498 smb_co_done(VCTOCP(vcp)); 499 smb_sl_destroy(&vcp->vc_stlock); 500 free(vcp, M_SMBCONN); 501 } 502 503 /* 504 * Called when use count of VC dropped to zero. 505 * VC should be locked on enter with LK_DRAIN. 506 */ 507 static void 508 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred) 509 { 510 struct smb_vc *vcp = CPTOVC(cp); 511 512 smb_vc_disconnect(vcp); 513 } 514 515 void 516 smb_vc_ref(struct smb_vc *vcp) 517 { 518 smb_co_ref(VCTOCP(vcp)); 519 } 520 521 void 522 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred) 523 { 524 smb_co_rele(VCTOCP(vcp), scred); 525 } 526 527 int 528 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred) 529 { 530 return smb_co_get(VCTOCP(vcp), flags, scred); 531 } 532 533 void 534 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred) 535 { 536 smb_co_put(VCTOCP(vcp), scred); 537 } 538 539 int 540 smb_vc_lock(struct smb_vc *vcp, int flags, struct thread *td) 541 { 542 return smb_co_lock(VCTOCP(vcp), flags, td); 543 } 544 545 void 546 smb_vc_unlock(struct smb_vc *vcp, int flags, struct thread *td) 547 { 548 smb_co_unlock(VCTOCP(vcp), flags, td); 549 } 550 551 int 552 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode) 553 { 554 struct ucred *cred = scred->scr_cred; 555 556 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid) 557 return 0; 558 mode >>= 3; 559 if (!groupmember(vcp->vc_grp, cred)) 560 mode >>= 3; 561 return (vcp->vc_mode & mode) == mode ? 0 : EACCES; 562 } 563 564 static int 565 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp) 566 { 567 int exact = 1; 568 569 if (strcmp(ssp->ss_name, dp->name) != 0) 570 return 1; 571 if (dp->owner != SMBM_ANY_OWNER) { 572 if (ssp->ss_uid != dp->owner) 573 return 1; 574 } else 575 exact = 0; 576 if (dp->group != SMBM_ANY_GROUP) { 577 if (ssp->ss_grp != dp->group) 578 return 1; 579 } else 580 exact = 0; 581 582 if (dp->mode & SMBM_EXACT) { 583 if (!exact) 584 return 1; 585 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1; 586 } 587 if (smb_share_access(ssp, dp->scred, dp->mode) != 0) 588 return 1; 589 return 0; 590 } 591 592 /* 593 * Lookup share in the given VC. Share referenced and locked on return. 594 * VC expected to be locked on entry and will be left locked on exit. 595 */ 596 int 597 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp, 598 struct smb_cred *scred, struct smb_share **sspp) 599 { 600 struct thread *td = scred->scr_td; 601 struct smb_connobj *scp = NULL; 602 struct smb_share *ssp = NULL; 603 int error; 604 605 *sspp = NULL; 606 dp->scred = scred; 607 SMBCO_FOREACH(scp, VCTOCP(vcp)) { 608 ssp = (struct smb_share *)scp; 609 error = smb_share_lock(ssp, LK_EXCLUSIVE, td); 610 if (error) 611 continue; 612 if (smb_vc_cmpshare(ssp, dp) == 0) 613 break; 614 smb_share_unlock(ssp, 0, td); 615 } 616 if (ssp) { 617 smb_share_ref(ssp); 618 *sspp = ssp; 619 error = 0; 620 } else 621 error = ENOENT; 622 return error; 623 } 624 625 int 626 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 627 { 628 629 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 630 } 631 632 /* 633 * Destroy VC to server, invalidate shares linked with it. 634 * Transport should be locked on entry. 635 */ 636 int 637 smb_vc_disconnect(struct smb_vc *vcp) 638 { 639 640 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 641 return 0; 642 } 643 644 static char smb_emptypass[] = ""; 645 646 const char * 647 smb_vc_getpass(struct smb_vc *vcp) 648 { 649 if (vcp->vc_pass) 650 return vcp->vc_pass; 651 return smb_emptypass; 652 } 653 654 static int 655 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip) 656 { 657 bzero(vip, sizeof(struct smb_vc_info)); 658 vip->itype = SMB_INFO_VC; 659 vip->usecount = vcp->obj.co_usecount; 660 vip->uid = vcp->vc_uid; 661 vip->gid = vcp->vc_grp; 662 vip->mode = vcp->vc_mode; 663 vip->flags = vcp->obj.co_flags; 664 vip->sopt = vcp->vc_sopt; 665 vip->iodstate = vcp->vc_iod->iod_state; 666 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey)); 667 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname); 668 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username); 669 return 0; 670 } 671 672 u_short 673 smb_vc_nextmid(struct smb_vc *vcp) 674 { 675 u_short r; 676 677 SMB_CO_LOCK(&vcp->obj); 678 r = vcp->vc_mid++; 679 SMB_CO_UNLOCK(&vcp->obj); 680 return r; 681 } 682 683 /* 684 * Share implementation 685 */ 686 /* 687 * Allocate share structure and attach it to the given VC 688 * Connection expected to be locked on entry. Share will be returned 689 * in locked state. 690 */ 691 int 692 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 693 struct smb_cred *scred, struct smb_share **sspp) 694 { 695 struct smb_share *ssp; 696 struct thread *td = scred->scr_td; 697 struct ucred *cred = scred->scr_cred; 698 uid_t realuid = cred->cr_uid; 699 uid_t uid = shspec->owner; 700 gid_t gid = shspec->group; 701 int error, isroot; 702 703 isroot = smb_suser(cred) == 0; 704 /* 705 * Only superuser can create shares with different uid and gid 706 */ 707 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 708 return EPERM; 709 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 710 return EPERM; 711 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp); 712 if (!error) { 713 smb_share_put(ssp, scred); 714 return EEXIST; 715 } 716 if (uid == SMBM_ANY_OWNER) 717 uid = realuid; 718 if (gid == SMBM_ANY_GROUP) 719 gid = cred->cr_groups[0]; 720 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK); 721 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss", td); 722 ssp->obj.co_free = smb_share_free; 723 ssp->obj.co_gone = smb_share_gone; 724 smb_sl_init(&ssp->ss_stlock, "ssstlock"); 725 ssp->ss_name = smb_strdup(shspec->name); 726 if (shspec->pass && shspec->pass[0]) 727 ssp->ss_pass = smb_strdup(shspec->pass); 728 ssp->ss_type = shspec->stype; 729 ssp->ss_tid = SMB_TID_UNKNOWN; 730 ssp->ss_uid = uid; 731 ssp->ss_grp = gid; 732 ssp->ss_mode = shspec->rights & SMBM_MASK; 733 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp)); 734 *sspp = ssp; 735 return 0; 736 } 737 738 static void 739 smb_share_free(struct smb_connobj *cp) 740 { 741 struct smb_share *ssp = CPTOSS(cp); 742 743 SMB_STRFREE(ssp->ss_name); 744 SMB_STRFREE(ssp->ss_pass); 745 smb_sl_destroy(&ssp->ss_stlock); 746 smb_co_done(SSTOCP(ssp)); 747 free(ssp, M_SMBCONN); 748 } 749 750 static void 751 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred) 752 { 753 struct smb_share *ssp = CPTOSS(cp); 754 755 smb_smb_treedisconnect(ssp, scred); 756 } 757 758 void 759 smb_share_ref(struct smb_share *ssp) 760 { 761 smb_co_ref(SSTOCP(ssp)); 762 } 763 764 void 765 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred) 766 { 767 smb_co_rele(SSTOCP(ssp), scred); 768 } 769 770 int 771 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred) 772 { 773 return smb_co_get(SSTOCP(ssp), flags, scred); 774 } 775 776 void 777 smb_share_put(struct smb_share *ssp, struct smb_cred *scred) 778 { 779 smb_co_put(SSTOCP(ssp), scred); 780 } 781 782 int 783 smb_share_lock(struct smb_share *ssp, int flags, struct thread *td) 784 { 785 return smb_co_lock(SSTOCP(ssp), flags, td); 786 } 787 788 void 789 smb_share_unlock(struct smb_share *ssp, int flags, struct thread *td) 790 { 791 smb_co_unlock(SSTOCP(ssp), flags, td); 792 } 793 794 int 795 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode) 796 { 797 struct ucred *cred = scred->scr_cred; 798 799 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid) 800 return 0; 801 mode >>= 3; 802 if (!groupmember(ssp->ss_grp, cred)) 803 mode >>= 3; 804 return (ssp->ss_mode & mode) == mode ? 0 : EACCES; 805 } 806 807 void 808 smb_share_invalidate(struct smb_share *ssp) 809 { 810 ssp->ss_tid = SMB_TID_UNKNOWN; 811 } 812 813 int 814 smb_share_valid(struct smb_share *ssp) 815 { 816 return ssp->ss_tid != SMB_TID_UNKNOWN && 817 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid; 818 } 819 820 const char* 821 smb_share_getpass(struct smb_share *ssp) 822 { 823 struct smb_vc *vcp; 824 825 if (ssp->ss_pass) 826 return ssp->ss_pass; 827 vcp = SSTOVC(ssp); 828 if (vcp->vc_pass) 829 return vcp->vc_pass; 830 return smb_emptypass; 831 } 832 833 static int 834 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip) 835 { 836 bzero(sip, sizeof(struct smb_share_info)); 837 sip->itype = SMB_INFO_SHARE; 838 sip->usecount = ssp->obj.co_usecount; 839 sip->tid = ssp->ss_tid; 840 sip->type= ssp->ss_type; 841 sip->uid = ssp->ss_uid; 842 sip->gid = ssp->ss_grp; 843 sip->mode= ssp->ss_mode; 844 sip->flags = ssp->obj.co_flags; 845 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name); 846 return 0; 847 } 848 849 /* 850 * Dump an entire tree into sysctl call 851 */ 852 static int 853 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS) 854 { 855 struct thread *td = req->td; 856 struct smb_cred scred; 857 struct smb_connobj *scp1, *scp2; 858 struct smb_vc *vcp; 859 struct smb_share *ssp; 860 struct smb_vc_info vci; 861 struct smb_share_info ssi; 862 int error, itype; 863 864 smb_makescred(&scred, td, td->td_ucred); 865 error = sysctl_wire_old_buffer(req, 0); 866 if (error) 867 return (error); 868 error = smb_sm_lockvclist(LK_SHARED, td); 869 if (error) 870 return error; 871 SMBCO_FOREACH(scp1, &smb_vclist) { 872 vcp = (struct smb_vc *)scp1; 873 error = smb_vc_lock(vcp, LK_SHARED, td); 874 if (error) 875 continue; 876 smb_vc_getinfo(vcp, &vci); 877 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info)); 878 if (error) { 879 smb_vc_unlock(vcp, 0, td); 880 break; 881 } 882 SMBCO_FOREACH(scp2, VCTOCP(vcp)) { 883 ssp = (struct smb_share *)scp2; 884 error = smb_share_lock(ssp, LK_SHARED, td); 885 if (error) { 886 error = 0; 887 continue; 888 } 889 smb_share_getinfo(ssp, &ssi); 890 smb_share_unlock(ssp, 0, td); 891 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info)); 892 if (error) 893 break; 894 } 895 smb_vc_unlock(vcp, 0, td); 896 if (error) 897 break; 898 } 899 if (!error) { 900 itype = SMB_INFO_NONE; 901 error = SYSCTL_OUT(req, &itype, sizeof(itype)); 902 } 903 smb_sm_unlockvclist(td); 904 return error; 905 }
Cache object: 8b8830a1f0bc0a9f06682e3c376654f8
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