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: releng/8.0/sys/netsmb/smb_conn.c 184571 2008-11-02 23:15:32Z rwatson $"); 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 *ilockname, 66 char *lockname); 67 static void smb_co_done(struct smb_connobj *cp); 68 static int smb_co_lockstatus(struct smb_connobj *cp); 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 ilock", "smbsm"); 86 smb_co_unlock(&smb_vclist, 0); 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, NULL); 100 smb_co_done(&smb_vclist); 101 return 0; 102 } 103 104 static int 105 smb_sm_lockvclist(int flags) 106 { 107 108 return smb_co_lock(&smb_vclist, flags | LK_CANRECURSE); 109 } 110 111 static void 112 smb_sm_unlockvclist(void) 113 { 114 115 smb_co_unlock(&smb_vclist, LK_RELEASE); 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 smb_connobj *scp; 123 struct smb_vc *vcp; 124 int exact = 1; 125 int error; 126 127 vcspec->shspec = shspec; 128 error = ENOENT; 129 vcp = NULL; 130 SMBCO_FOREACH(scp, &smb_vclist) { 131 vcp = (struct smb_vc *)scp; 132 error = smb_vc_lock(vcp, LK_EXCLUSIVE); 133 if (error) 134 continue; 135 136 if ((vcp->obj.co_flags & SMBV_PRIVATE) || 137 !CONNADDREQ(vcp->vc_paddr, vcspec->sap) || 138 strcmp(vcp->vc_username, vcspec->username) != 0) 139 goto err1; 140 if (vcspec->owner != SMBM_ANY_OWNER) { 141 if (vcp->vc_uid != vcspec->owner) 142 goto err1; 143 } else 144 exact = 0; 145 if (vcspec->group != SMBM_ANY_GROUP) { 146 if (vcp->vc_grp != vcspec->group) 147 goto err1; 148 } else 149 exact = 0; 150 if (vcspec->mode & SMBM_EXACT) { 151 if (!exact || (vcspec->mode & SMBM_MASK) != 152 vcp->vc_mode) 153 goto err1; 154 } 155 if (smb_vc_access(vcp, scred, vcspec->mode) != 0) 156 goto err1; 157 vcspec->ssp = NULL; 158 if (shspec) { 159 error = (int)smb_vc_lookupshare(vcp, shspec, scred, 160 &vcspec->ssp); 161 if (error) 162 goto fail; 163 } 164 error = 0; 165 break; 166 err1: 167 error = 1; 168 fail: 169 smb_vc_unlock(vcp, 0); 170 } 171 if (vcp) { 172 smb_vc_ref(vcp); 173 *vcpp = vcp; 174 } 175 return (error); 176 } 177 178 int 179 smb_sm_lookup(struct smb_vcspec *vcspec, struct smb_sharespec *shspec, 180 struct smb_cred *scred, struct smb_vc **vcpp) 181 { 182 struct smb_vc *vcp; 183 struct smb_share *ssp = NULL; 184 int error; 185 186 *vcpp = vcp = NULL; 187 188 error = smb_sm_lockvclist(LK_EXCLUSIVE); 189 if (error) 190 return error; 191 error = smb_sm_lookupint(vcspec, shspec, scred, vcpp); 192 if (error == 0 || (vcspec->flags & SMBV_CREATE) == 0) { 193 smb_sm_unlockvclist(); 194 return error; 195 } 196 error = smb_sm_lookupint(vcspec, NULL, scred, &vcp); 197 if (error) { 198 error = smb_vc_create(vcspec, scred, &vcp); 199 if (error) 200 goto out; 201 error = smb_vc_connect(vcp, scred); 202 if (error) 203 goto out; 204 } 205 if (shspec == NULL) 206 goto out; 207 error = smb_share_create(vcp, shspec, scred, &ssp); 208 if (error) 209 goto out; 210 error = smb_smb_treeconnect(ssp, scred); 211 if (error == 0) 212 vcspec->ssp = ssp; 213 else 214 smb_share_put(ssp, scred); 215 out: 216 smb_sm_unlockvclist(); 217 if (error == 0) 218 *vcpp = vcp; 219 else if (vcp) { 220 smb_vc_lock(vcp, LK_EXCLUSIVE); 221 smb_vc_put(vcp, scred); 222 } 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 *ilockname, char *lockname) 231 { 232 SLIST_INIT(&cp->co_children); 233 smb_sl_init(&cp->co_interlock, ilockname); 234 lockinit(&cp->co_lock, PZERO, lockname, 0, 0); 235 cp->co_level = level; 236 cp->co_usecount = 1; 237 if (smb_co_lock(cp, LK_EXCLUSIVE) != 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, NULL); 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); 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 { 278 279 SMB_CO_LOCK(cp); 280 if (cp->co_usecount > 1) { 281 cp->co_usecount--; 282 SMB_CO_UNLOCK(cp); 283 return; 284 } 285 if (cp->co_usecount == 0) { 286 SMBERROR("negative use_count for object %d", cp->co_level); 287 SMB_CO_UNLOCK(cp); 288 return; 289 } 290 cp->co_usecount--; 291 cp->co_flags |= SMBO_GONE; 292 293 lockmgr(&cp->co_lock, LK_DRAIN | LK_INTERLOCK, &cp->co_interlock); 294 smb_co_gone(cp, scred); 295 } 296 297 int 298 smb_co_get(struct smb_connobj *cp, int flags, struct smb_cred *scred) 299 { 300 int error; 301 302 if ((flags & LK_INTERLOCK) == 0) 303 SMB_CO_LOCK(cp); 304 cp->co_usecount++; 305 error = smb_co_lock(cp, flags | LK_INTERLOCK); 306 if (error) { 307 SMB_CO_LOCK(cp); 308 cp->co_usecount--; 309 SMB_CO_UNLOCK(cp); 310 return error; 311 } 312 return 0; 313 } 314 315 void 316 smb_co_put(struct smb_connobj *cp, struct smb_cred *scred) 317 { 318 319 SMB_CO_LOCK(cp); 320 if (cp->co_usecount > 1) { 321 cp->co_usecount--; 322 } else if (cp->co_usecount == 1) { 323 cp->co_usecount--; 324 cp->co_flags |= SMBO_GONE; 325 } else { 326 SMBERROR("negative usecount"); 327 } 328 lockmgr(&cp->co_lock, LK_RELEASE | LK_INTERLOCK, &cp->co_interlock); 329 if ((cp->co_flags & SMBO_GONE) == 0) 330 return; 331 lockmgr(&cp->co_lock, LK_DRAIN, NULL); 332 smb_co_gone(cp, scred); 333 } 334 335 int 336 smb_co_lockstatus(struct smb_connobj *cp) 337 { 338 return lockstatus(&cp->co_lock); 339 } 340 341 int 342 smb_co_lock(struct smb_connobj *cp, int flags) 343 { 344 345 if (cp->co_flags & SMBO_GONE) 346 return EINVAL; 347 if ((flags & LK_TYPE_MASK) == 0) 348 flags |= LK_EXCLUSIVE; 349 if (smb_co_lockstatus(cp) == LK_EXCLUSIVE && 350 (flags & LK_CANRECURSE) == 0) { 351 SMBERROR("recursive lock for object %d\n", cp->co_level); 352 return 0; 353 } 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 { 366 367 KASSERT(smb_co_lockstatus(parent) == LK_EXCLUSIVE, 368 ("smb_co_addchild: parent not locked")); 369 KASSERT(smb_co_lockstatus(child) == LK_EXCLUSIVE, 370 ("smb_co_addchild: child not locked")); 371 372 smb_co_ref(parent); 373 SLIST_INSERT_HEAD(&parent->co_children, child, co_next); 374 child->co_parent = parent; 375 } 376 377 /* 378 * Session implementation 379 */ 380 381 int 382 smb_vc_create(struct smb_vcspec *vcspec, 383 struct smb_cred *scred, struct smb_vc **vcpp) 384 { 385 struct smb_vc *vcp; 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 ilock", "smb_vc"); 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) 541 { 542 return smb_co_lock(VCTOCP(vcp), flags); 543 } 544 545 void 546 smb_vc_unlock(struct smb_vc *vcp, int flags) 547 { 548 smb_co_unlock(VCTOCP(vcp), flags); 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 smb_connobj *scp = NULL; 601 struct smb_share *ssp = NULL; 602 int error; 603 604 *sspp = NULL; 605 dp->scred = scred; 606 SMBCO_FOREACH(scp, VCTOCP(vcp)) { 607 ssp = (struct smb_share *)scp; 608 error = smb_share_lock(ssp, LK_EXCLUSIVE); 609 if (error) 610 continue; 611 if (smb_vc_cmpshare(ssp, dp) == 0) 612 break; 613 smb_share_unlock(ssp, 0); 614 } 615 if (ssp) { 616 smb_share_ref(ssp); 617 *sspp = ssp; 618 error = 0; 619 } else 620 error = ENOENT; 621 return error; 622 } 623 624 int 625 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 626 { 627 628 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 629 } 630 631 /* 632 * Destroy VC to server, invalidate shares linked with it. 633 * Transport should be locked on entry. 634 */ 635 int 636 smb_vc_disconnect(struct smb_vc *vcp) 637 { 638 639 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 640 return 0; 641 } 642 643 static char smb_emptypass[] = ""; 644 645 const char * 646 smb_vc_getpass(struct smb_vc *vcp) 647 { 648 if (vcp->vc_pass) 649 return vcp->vc_pass; 650 return smb_emptypass; 651 } 652 653 static int 654 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip) 655 { 656 bzero(vip, sizeof(struct smb_vc_info)); 657 vip->itype = SMB_INFO_VC; 658 vip->usecount = vcp->obj.co_usecount; 659 vip->uid = vcp->vc_uid; 660 vip->gid = vcp->vc_grp; 661 vip->mode = vcp->vc_mode; 662 vip->flags = vcp->obj.co_flags; 663 vip->sopt = vcp->vc_sopt; 664 vip->iodstate = vcp->vc_iod->iod_state; 665 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey)); 666 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname); 667 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username); 668 return 0; 669 } 670 671 u_short 672 smb_vc_nextmid(struct smb_vc *vcp) 673 { 674 u_short r; 675 676 SMB_CO_LOCK(&vcp->obj); 677 r = vcp->vc_mid++; 678 SMB_CO_UNLOCK(&vcp->obj); 679 return r; 680 } 681 682 /* 683 * Share implementation 684 */ 685 /* 686 * Allocate share structure and attach it to the given VC 687 * Connection expected to be locked on entry. Share will be returned 688 * in locked state. 689 */ 690 int 691 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 692 struct smb_cred *scred, struct smb_share **sspp) 693 { 694 struct smb_share *ssp; 695 struct ucred *cred = scred->scr_cred; 696 uid_t realuid = cred->cr_uid; 697 uid_t uid = shspec->owner; 698 gid_t gid = shspec->group; 699 int error, isroot; 700 701 isroot = smb_suser(cred) == 0; 702 /* 703 * Only superuser can create shares with different uid and gid 704 */ 705 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 706 return EPERM; 707 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 708 return EPERM; 709 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp); 710 if (!error) { 711 smb_share_put(ssp, scred); 712 return EEXIST; 713 } 714 if (uid == SMBM_ANY_OWNER) 715 uid = realuid; 716 if (gid == SMBM_ANY_GROUP) 717 gid = cred->cr_groups[0]; 718 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK); 719 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss ilock", "smbss"); 720 ssp->obj.co_free = smb_share_free; 721 ssp->obj.co_gone = smb_share_gone; 722 smb_sl_init(&ssp->ss_stlock, "ssstlock"); 723 ssp->ss_name = smb_strdup(shspec->name); 724 if (shspec->pass && shspec->pass[0]) 725 ssp->ss_pass = smb_strdup(shspec->pass); 726 ssp->ss_type = shspec->stype; 727 ssp->ss_tid = SMB_TID_UNKNOWN; 728 ssp->ss_uid = uid; 729 ssp->ss_grp = gid; 730 ssp->ss_mode = shspec->rights & SMBM_MASK; 731 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp)); 732 *sspp = ssp; 733 return 0; 734 } 735 736 static void 737 smb_share_free(struct smb_connobj *cp) 738 { 739 struct smb_share *ssp = CPTOSS(cp); 740 741 SMB_STRFREE(ssp->ss_name); 742 SMB_STRFREE(ssp->ss_pass); 743 smb_sl_destroy(&ssp->ss_stlock); 744 smb_co_done(SSTOCP(ssp)); 745 free(ssp, M_SMBCONN); 746 } 747 748 static void 749 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred) 750 { 751 struct smb_share *ssp = CPTOSS(cp); 752 753 smb_smb_treedisconnect(ssp, scred); 754 } 755 756 void 757 smb_share_ref(struct smb_share *ssp) 758 { 759 smb_co_ref(SSTOCP(ssp)); 760 } 761 762 void 763 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred) 764 { 765 smb_co_rele(SSTOCP(ssp), scred); 766 } 767 768 int 769 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred) 770 { 771 return smb_co_get(SSTOCP(ssp), flags, scred); 772 } 773 774 void 775 smb_share_put(struct smb_share *ssp, struct smb_cred *scred) 776 { 777 smb_co_put(SSTOCP(ssp), scred); 778 } 779 780 int 781 smb_share_lock(struct smb_share *ssp, int flags) 782 { 783 return smb_co_lock(SSTOCP(ssp), flags); 784 } 785 786 void 787 smb_share_unlock(struct smb_share *ssp, int flags) 788 { 789 smb_co_unlock(SSTOCP(ssp), flags); 790 } 791 792 int 793 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode) 794 { 795 struct ucred *cred = scred->scr_cred; 796 797 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid) 798 return 0; 799 mode >>= 3; 800 if (!groupmember(ssp->ss_grp, cred)) 801 mode >>= 3; 802 return (ssp->ss_mode & mode) == mode ? 0 : EACCES; 803 } 804 805 void 806 smb_share_invalidate(struct smb_share *ssp) 807 { 808 ssp->ss_tid = SMB_TID_UNKNOWN; 809 } 810 811 int 812 smb_share_valid(struct smb_share *ssp) 813 { 814 return ssp->ss_tid != SMB_TID_UNKNOWN && 815 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid; 816 } 817 818 const char* 819 smb_share_getpass(struct smb_share *ssp) 820 { 821 struct smb_vc *vcp; 822 823 if (ssp->ss_pass) 824 return ssp->ss_pass; 825 vcp = SSTOVC(ssp); 826 if (vcp->vc_pass) 827 return vcp->vc_pass; 828 return smb_emptypass; 829 } 830 831 static int 832 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip) 833 { 834 bzero(sip, sizeof(struct smb_share_info)); 835 sip->itype = SMB_INFO_SHARE; 836 sip->usecount = ssp->obj.co_usecount; 837 sip->tid = ssp->ss_tid; 838 sip->type= ssp->ss_type; 839 sip->uid = ssp->ss_uid; 840 sip->gid = ssp->ss_grp; 841 sip->mode= ssp->ss_mode; 842 sip->flags = ssp->obj.co_flags; 843 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name); 844 return 0; 845 } 846 847 /* 848 * Dump an entire tree into sysctl call 849 */ 850 static int 851 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS) 852 { 853 struct thread *td = req->td; 854 struct smb_cred scred; 855 struct smb_connobj *scp1, *scp2; 856 struct smb_vc *vcp; 857 struct smb_share *ssp; 858 struct smb_vc_info vci; 859 struct smb_share_info ssi; 860 int error, itype; 861 862 smb_makescred(&scred, td, td->td_ucred); 863 error = sysctl_wire_old_buffer(req, 0); 864 if (error) 865 return (error); 866 error = smb_sm_lockvclist(LK_SHARED); 867 if (error) 868 return error; 869 SMBCO_FOREACH(scp1, &smb_vclist) { 870 vcp = (struct smb_vc *)scp1; 871 error = smb_vc_lock(vcp, LK_SHARED); 872 if (error) 873 continue; 874 smb_vc_getinfo(vcp, &vci); 875 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info)); 876 if (error) { 877 smb_vc_unlock(vcp, 0); 878 break; 879 } 880 SMBCO_FOREACH(scp2, VCTOCP(vcp)) { 881 ssp = (struct smb_share *)scp2; 882 error = smb_share_lock(ssp, LK_SHARED); 883 if (error) { 884 error = 0; 885 continue; 886 } 887 smb_share_getinfo(ssp, &ssi); 888 smb_share_unlock(ssp, 0); 889 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info)); 890 if (error) 891 break; 892 } 893 smb_vc_unlock(vcp, 0); 894 if (error) 895 break; 896 } 897 if (!error) { 898 itype = SMB_INFO_NONE; 899 error = SYSCTL_OUT(req, &itype, sizeof(itype)); 900 } 901 smb_sm_unlockvclist(); 902 return error; 903 }
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