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 *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_cp_toserver); 454 if (error) 455 goto fail; 456 error = (int)iconv_open(vcspec->localcs, vcspec->servercs, 457 &vcp->vc_cp_tolocal); 458 if (error) 459 goto fail; 460 vcp->vc_toserver = vcp->vc_cp_toserver; 461 vcp->vc_tolocal = vcp->vc_cp_tolocal; 462 iconv_add(ENCODING_UNICODE, ENCODING_UNICODE, SMB_UNICODE_NAME); 463 iconv_add(ENCODING_UNICODE, SMB_UNICODE_NAME, ENCODING_UNICODE); 464 error = (int)iconv_open(SMB_UNICODE_NAME, vcspec->localcs, 465 &vcp->vc_ucs_toserver); 466 if (!error) { 467 error = (int)iconv_open(vcspec->localcs, SMB_UNICODE_NAME, 468 &vcp->vc_ucs_tolocal); 469 } 470 if (error) { 471 if (vcp->vc_ucs_toserver) 472 iconv_close(vcp->vc_ucs_toserver); 473 vcp->vc_ucs_toserver = NULL; 474 vcp->vc_ucs_tolocal = NULL; 475 } 476 } 477 error = (int)smb_iod_create(vcp); 478 if (error) 479 goto fail; 480 *vcpp = vcp; 481 smb_co_addchild(&smb_vclist, VCTOCP(vcp)); 482 return (0); 483 484 fail: 485 smb_vc_put(vcp, scred); 486 return (error); 487 } 488 489 static void 490 smb_vc_free(struct smb_connobj *cp) 491 { 492 struct smb_vc *vcp = CPTOVC(cp); 493 494 if (vcp->vc_iod) 495 smb_iod_destroy(vcp->vc_iod); 496 SMB_STRFREE(vcp->vc_username); 497 SMB_STRFREE(vcp->vc_srvname); 498 SMB_STRFREE(vcp->vc_pass); 499 SMB_STRFREE(vcp->vc_domain); 500 if (vcp->vc_mackey) 501 free(vcp->vc_mackey, M_SMBTEMP); 502 if (vcp->vc_paddr) 503 free(vcp->vc_paddr, M_SONAME); 504 if (vcp->vc_laddr) 505 free(vcp->vc_laddr, M_SONAME); 506 if (vcp->vc_tolower) 507 iconv_close(vcp->vc_tolower); 508 if (vcp->vc_toupper) 509 iconv_close(vcp->vc_toupper); 510 if (vcp->vc_tolocal) 511 vcp->vc_tolocal = NULL; 512 if (vcp->vc_toserver) 513 vcp->vc_toserver = NULL; 514 if (vcp->vc_cp_tolocal) 515 iconv_close(vcp->vc_cp_tolocal); 516 if (vcp->vc_cp_toserver) 517 iconv_close(vcp->vc_cp_toserver); 518 if (vcp->vc_ucs_tolocal) 519 iconv_close(vcp->vc_ucs_tolocal); 520 if (vcp->vc_ucs_toserver) 521 iconv_close(vcp->vc_ucs_toserver); 522 smb_co_done(VCTOCP(vcp)); 523 smb_sl_destroy(&vcp->vc_stlock); 524 free(vcp, M_SMBCONN); 525 } 526 527 /* 528 * Called when use count of VC dropped to zero. 529 * VC should be locked on enter with LK_DRAIN. 530 */ 531 static void 532 smb_vc_gone(struct smb_connobj *cp, struct smb_cred *scred) 533 { 534 struct smb_vc *vcp = CPTOVC(cp); 535 536 smb_vc_disconnect(vcp); 537 } 538 539 void 540 smb_vc_ref(struct smb_vc *vcp) 541 { 542 smb_co_ref(VCTOCP(vcp)); 543 } 544 545 void 546 smb_vc_rele(struct smb_vc *vcp, struct smb_cred *scred) 547 { 548 smb_co_rele(VCTOCP(vcp), scred); 549 } 550 551 int 552 smb_vc_get(struct smb_vc *vcp, int flags, struct smb_cred *scred) 553 { 554 return smb_co_get(VCTOCP(vcp), flags, scred); 555 } 556 557 void 558 smb_vc_put(struct smb_vc *vcp, struct smb_cred *scred) 559 { 560 smb_co_put(VCTOCP(vcp), scred); 561 } 562 563 int 564 smb_vc_lock(struct smb_vc *vcp, int flags) 565 { 566 return smb_co_lock(VCTOCP(vcp), flags); 567 } 568 569 void 570 smb_vc_unlock(struct smb_vc *vcp, int flags) 571 { 572 smb_co_unlock(VCTOCP(vcp), flags); 573 } 574 575 int 576 smb_vc_access(struct smb_vc *vcp, struct smb_cred *scred, mode_t mode) 577 { 578 struct ucred *cred = scred->scr_cred; 579 580 if (smb_suser(cred) == 0 || cred->cr_uid == vcp->vc_uid) 581 return 0; 582 mode >>= 3; 583 if (!groupmember(vcp->vc_grp, cred)) 584 mode >>= 3; 585 return (vcp->vc_mode & mode) == mode ? 0 : EACCES; 586 } 587 588 static int 589 smb_vc_cmpshare(struct smb_share *ssp, struct smb_sharespec *dp) 590 { 591 int exact = 1; 592 593 if (strcmp(ssp->ss_name, dp->name) != 0) 594 return 1; 595 if (dp->owner != SMBM_ANY_OWNER) { 596 if (ssp->ss_uid != dp->owner) 597 return 1; 598 } else 599 exact = 0; 600 if (dp->group != SMBM_ANY_GROUP) { 601 if (ssp->ss_grp != dp->group) 602 return 1; 603 } else 604 exact = 0; 605 606 if (dp->mode & SMBM_EXACT) { 607 if (!exact) 608 return 1; 609 return (dp->mode & SMBM_MASK) == ssp->ss_mode ? 0 : 1; 610 } 611 if (smb_share_access(ssp, dp->scred, dp->mode) != 0) 612 return 1; 613 return 0; 614 } 615 616 /* 617 * Lookup share in the given VC. Share referenced and locked on return. 618 * VC expected to be locked on entry and will be left locked on exit. 619 */ 620 int 621 smb_vc_lookupshare(struct smb_vc *vcp, struct smb_sharespec *dp, 622 struct smb_cred *scred, struct smb_share **sspp) 623 { 624 struct smb_connobj *scp = NULL; 625 struct smb_share *ssp = NULL; 626 int error; 627 628 *sspp = NULL; 629 dp->scred = scred; 630 SMBCO_FOREACH(scp, VCTOCP(vcp)) { 631 ssp = (struct smb_share *)scp; 632 error = smb_share_lock(ssp, LK_EXCLUSIVE); 633 if (error) 634 continue; 635 if (smb_vc_cmpshare(ssp, dp) == 0) 636 break; 637 smb_share_unlock(ssp, 0); 638 } 639 if (ssp) { 640 smb_share_ref(ssp); 641 *sspp = ssp; 642 error = 0; 643 } else 644 error = ENOENT; 645 return error; 646 } 647 648 int 649 smb_vc_connect(struct smb_vc *vcp, struct smb_cred *scred) 650 { 651 652 return smb_iod_request(vcp->vc_iod, SMBIOD_EV_CONNECT | SMBIOD_EV_SYNC, NULL); 653 } 654 655 /* 656 * Destroy VC to server, invalidate shares linked with it. 657 * Transport should be locked on entry. 658 */ 659 int 660 smb_vc_disconnect(struct smb_vc *vcp) 661 { 662 663 smb_iod_request(vcp->vc_iod, SMBIOD_EV_DISCONNECT | SMBIOD_EV_SYNC, NULL); 664 return 0; 665 } 666 667 static char smb_emptypass[] = ""; 668 669 const char * 670 smb_vc_getpass(struct smb_vc *vcp) 671 { 672 if (vcp->vc_pass) 673 return vcp->vc_pass; 674 return smb_emptypass; 675 } 676 677 static int 678 smb_vc_getinfo(struct smb_vc *vcp, struct smb_vc_info *vip) 679 { 680 bzero(vip, sizeof(struct smb_vc_info)); 681 vip->itype = SMB_INFO_VC; 682 vip->usecount = vcp->obj.co_usecount; 683 vip->uid = vcp->vc_uid; 684 vip->gid = vcp->vc_grp; 685 vip->mode = vcp->vc_mode; 686 vip->flags = vcp->obj.co_flags; 687 vip->sopt = vcp->vc_sopt; 688 vip->iodstate = vcp->vc_iod->iod_state; 689 bzero(&vip->sopt.sv_skey, sizeof(vip->sopt.sv_skey)); 690 snprintf(vip->srvname, sizeof(vip->srvname), "%s", vcp->vc_srvname); 691 snprintf(vip->vcname, sizeof(vip->vcname), "%s", vcp->vc_username); 692 return 0; 693 } 694 695 u_short 696 smb_vc_nextmid(struct smb_vc *vcp) 697 { 698 u_short r; 699 700 SMB_CO_LOCK(&vcp->obj); 701 r = vcp->vc_mid++; 702 SMB_CO_UNLOCK(&vcp->obj); 703 return r; 704 } 705 706 /* 707 * Share implementation 708 */ 709 /* 710 * Allocate share structure and attach it to the given VC 711 * Connection expected to be locked on entry. Share will be returned 712 * in locked state. 713 */ 714 int 715 smb_share_create(struct smb_vc *vcp, struct smb_sharespec *shspec, 716 struct smb_cred *scred, struct smb_share **sspp) 717 { 718 struct smb_share *ssp; 719 struct ucred *cred = scred->scr_cred; 720 uid_t realuid = cred->cr_uid; 721 uid_t uid = shspec->owner; 722 gid_t gid = shspec->group; 723 int error, isroot; 724 725 isroot = smb_suser(cred) == 0; 726 /* 727 * Only superuser can create shares with different uid and gid 728 */ 729 if (uid != SMBM_ANY_OWNER && uid != realuid && !isroot) 730 return EPERM; 731 if (gid != SMBM_ANY_GROUP && !groupmember(gid, cred) && !isroot) 732 return EPERM; 733 error = smb_vc_lookupshare(vcp, shspec, scred, &ssp); 734 if (!error) { 735 smb_share_put(ssp, scred); 736 return EEXIST; 737 } 738 if (uid == SMBM_ANY_OWNER) 739 uid = realuid; 740 if (gid == SMBM_ANY_GROUP) 741 gid = cred->cr_groups[0]; 742 ssp = smb_zmalloc(sizeof(*ssp), M_SMBCONN, M_WAITOK); 743 smb_co_init(SSTOCP(ssp), SMBL_SHARE, "smbss ilock", "smbss"); 744 ssp->obj.co_free = smb_share_free; 745 ssp->obj.co_gone = smb_share_gone; 746 smb_sl_init(&ssp->ss_stlock, "ssstlock"); 747 ssp->ss_name = smb_strdup(shspec->name); 748 if (shspec->pass && shspec->pass[0]) 749 ssp->ss_pass = smb_strdup(shspec->pass); 750 ssp->ss_type = shspec->stype; 751 ssp->ss_tid = SMB_TID_UNKNOWN; 752 ssp->ss_uid = uid; 753 ssp->ss_grp = gid; 754 ssp->ss_mode = shspec->rights & SMBM_MASK; 755 smb_co_addchild(VCTOCP(vcp), SSTOCP(ssp)); 756 *sspp = ssp; 757 return 0; 758 } 759 760 static void 761 smb_share_free(struct smb_connobj *cp) 762 { 763 struct smb_share *ssp = CPTOSS(cp); 764 765 SMB_STRFREE(ssp->ss_name); 766 SMB_STRFREE(ssp->ss_pass); 767 smb_sl_destroy(&ssp->ss_stlock); 768 smb_co_done(SSTOCP(ssp)); 769 free(ssp, M_SMBCONN); 770 } 771 772 static void 773 smb_share_gone(struct smb_connobj *cp, struct smb_cred *scred) 774 { 775 struct smb_share *ssp = CPTOSS(cp); 776 777 smb_smb_treedisconnect(ssp, scred); 778 } 779 780 void 781 smb_share_ref(struct smb_share *ssp) 782 { 783 smb_co_ref(SSTOCP(ssp)); 784 } 785 786 void 787 smb_share_rele(struct smb_share *ssp, struct smb_cred *scred) 788 { 789 smb_co_rele(SSTOCP(ssp), scred); 790 } 791 792 int 793 smb_share_get(struct smb_share *ssp, int flags, struct smb_cred *scred) 794 { 795 return smb_co_get(SSTOCP(ssp), flags, scred); 796 } 797 798 void 799 smb_share_put(struct smb_share *ssp, struct smb_cred *scred) 800 { 801 smb_co_put(SSTOCP(ssp), scred); 802 } 803 804 int 805 smb_share_lock(struct smb_share *ssp, int flags) 806 { 807 return smb_co_lock(SSTOCP(ssp), flags); 808 } 809 810 void 811 smb_share_unlock(struct smb_share *ssp, int flags) 812 { 813 smb_co_unlock(SSTOCP(ssp), flags); 814 } 815 816 int 817 smb_share_access(struct smb_share *ssp, struct smb_cred *scred, mode_t mode) 818 { 819 struct ucred *cred = scred->scr_cred; 820 821 if (smb_suser(cred) == 0 || cred->cr_uid == ssp->ss_uid) 822 return 0; 823 mode >>= 3; 824 if (!groupmember(ssp->ss_grp, cred)) 825 mode >>= 3; 826 return (ssp->ss_mode & mode) == mode ? 0 : EACCES; 827 } 828 829 void 830 smb_share_invalidate(struct smb_share *ssp) 831 { 832 ssp->ss_tid = SMB_TID_UNKNOWN; 833 } 834 835 int 836 smb_share_valid(struct smb_share *ssp) 837 { 838 return ssp->ss_tid != SMB_TID_UNKNOWN && 839 ssp->ss_vcgenid == SSTOVC(ssp)->vc_genid; 840 } 841 842 const char* 843 smb_share_getpass(struct smb_share *ssp) 844 { 845 struct smb_vc *vcp; 846 847 if (ssp->ss_pass) 848 return ssp->ss_pass; 849 vcp = SSTOVC(ssp); 850 if (vcp->vc_pass) 851 return vcp->vc_pass; 852 return smb_emptypass; 853 } 854 855 static int 856 smb_share_getinfo(struct smb_share *ssp, struct smb_share_info *sip) 857 { 858 bzero(sip, sizeof(struct smb_share_info)); 859 sip->itype = SMB_INFO_SHARE; 860 sip->usecount = ssp->obj.co_usecount; 861 sip->tid = ssp->ss_tid; 862 sip->type= ssp->ss_type; 863 sip->uid = ssp->ss_uid; 864 sip->gid = ssp->ss_grp; 865 sip->mode= ssp->ss_mode; 866 sip->flags = ssp->obj.co_flags; 867 snprintf(sip->sname, sizeof(sip->sname), "%s", ssp->ss_name); 868 return 0; 869 } 870 871 /* 872 * Dump an entire tree into sysctl call 873 */ 874 static int 875 smb_sysctl_treedump(SYSCTL_HANDLER_ARGS) 876 { 877 struct thread *td = req->td; 878 struct smb_cred scred; 879 struct smb_connobj *scp1, *scp2; 880 struct smb_vc *vcp; 881 struct smb_share *ssp; 882 struct smb_vc_info vci; 883 struct smb_share_info ssi; 884 int error, itype; 885 886 smb_makescred(&scred, td, td->td_ucred); 887 error = sysctl_wire_old_buffer(req, 0); 888 if (error) 889 return (error); 890 error = smb_sm_lockvclist(LK_SHARED); 891 if (error) 892 return error; 893 SMBCO_FOREACH(scp1, &smb_vclist) { 894 vcp = (struct smb_vc *)scp1; 895 error = smb_vc_lock(vcp, LK_SHARED); 896 if (error) 897 continue; 898 smb_vc_getinfo(vcp, &vci); 899 error = SYSCTL_OUT(req, &vci, sizeof(struct smb_vc_info)); 900 if (error) { 901 smb_vc_unlock(vcp, 0); 902 break; 903 } 904 SMBCO_FOREACH(scp2, VCTOCP(vcp)) { 905 ssp = (struct smb_share *)scp2; 906 error = smb_share_lock(ssp, LK_SHARED); 907 if (error) { 908 error = 0; 909 continue; 910 } 911 smb_share_getinfo(ssp, &ssi); 912 smb_share_unlock(ssp, 0); 913 error = SYSCTL_OUT(req, &ssi, sizeof(struct smb_share_info)); 914 if (error) 915 break; 916 } 917 smb_vc_unlock(vcp, 0); 918 if (error) 919 break; 920 } 921 if (!error) { 922 itype = SMB_INFO_NONE; 923 error = SYSCTL_OUT(req, &itype, sizeof(itype)); 924 } 925 smb_sm_unlockvclist(); 926 return error; 927 }
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