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 * $Id: smbfs_vnops.c,v 1.128.36.1 2005/05/27 02:35:28 lindak Exp $ 33 */ 34 35 /* 36 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 37 * Use is subject to license terms. 38 */ 39 40 #include <sys/systm.h> 41 #include <sys/cred.h> 42 #include <sys/vnode.h> 43 #include <sys/vfs.h> 44 #include <sys/filio.h> 45 #include <sys/uio.h> 46 #include <sys/dirent.h> 47 #include <sys/errno.h> 48 #include <sys/sysmacros.h> 49 #include <sys/kmem.h> 50 #include <sys/cmn_err.h> 51 #include <sys/dnlc.h> 52 #include <sys/vfs_opreg.h> 53 #include <sys/policy.h> 54 55 #include <netsmb/smb_osdep.h> 56 #include <netsmb/smb.h> 57 #include <netsmb/smb_conn.h> 58 #include <netsmb/smb_subr.h> 59 60 #include <smbfs/smbfs.h> 61 #include <smbfs/smbfs_node.h> 62 #include <smbfs/smbfs_subr.h> 63 64 #include <sys/fs/smbfs_ioctl.h> 65 #include <fs/fs_subr.h> 66 67 /* 68 * These characters are illegal in NTFS file names. 69 * ref: http://support.microsoft.com/kb/147438 70 * 71 * Careful! The check in the XATTR case skips the 72 * first character to allow colon in XATTR names. 73 */ 74 static const char illegal_chars[] = { 75 ':', /* colon - keep this first! */ 76 '\\', /* back slash */ 77 '/', /* slash */ 78 '*', /* asterisk */ 79 '?', /* question mark */ 80 '"', /* double quote */ 81 '<', /* less than sign */ 82 '>', /* greater than sign */ 83 '|', /* vertical bar */ 84 0 85 }; 86 87 /* 88 * Turning this on causes nodes to be created in the cache 89 * during directory listings. The "fast" claim is debatable, 90 * and the effects on the cache can be undesirable. 91 */ 92 93 /* local static function defines */ 94 95 #ifdef USE_DNLC 96 static int smbfslookup_dnlc(vnode_t *dvp, char *nm, vnode_t **vpp, 97 cred_t *cr); 98 #endif 99 static int smbfslookup(vnode_t *dvp, char *nm, vnode_t **vpp, cred_t *cr, 100 int dnlc, caller_context_t *); 101 static int smbfsrename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, 102 cred_t *cr, caller_context_t *); 103 static int smbfssetattr(vnode_t *, struct vattr *, int, cred_t *); 104 static int smbfs_accessx(void *, int, cred_t *); 105 static int smbfs_readvdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp, 106 caller_context_t *); 107 /* 108 * These are the vnode ops routines which implement the vnode interface to 109 * the networked file system. These routines just take their parameters, 110 * make them look networkish by putting the right info into interface structs, 111 * and then calling the appropriate remote routine(s) to do the work. 112 * 113 * Note on directory name lookup cacheing: If we detect a stale fhandle, 114 * we purge the directory cache relative to that vnode. This way, the 115 * user won't get burned by the cache repeatedly. See <smbfs/smbnode.h> for 116 * more details on smbnode locking. 117 */ 118 119 static int smbfs_open(vnode_t **, int, cred_t *, caller_context_t *); 120 static int smbfs_close(vnode_t *, int, int, offset_t, cred_t *, 121 caller_context_t *); 122 static int smbfs_read(vnode_t *, struct uio *, int, cred_t *, 123 caller_context_t *); 124 static int smbfs_write(vnode_t *, struct uio *, int, cred_t *, 125 caller_context_t *); 126 static int smbfs_ioctl(vnode_t *, int, intptr_t, int, cred_t *, int *, 127 caller_context_t *); 128 static int smbfs_getattr(vnode_t *, struct vattr *, int, cred_t *, 129 caller_context_t *); 130 static int smbfs_setattr(vnode_t *, struct vattr *, int, cred_t *, 131 caller_context_t *); 132 static int smbfs_access(vnode_t *, int, int, cred_t *, caller_context_t *); 133 static int smbfs_fsync(vnode_t *, int, cred_t *, caller_context_t *); 134 static void smbfs_inactive(vnode_t *, cred_t *, caller_context_t *); 135 static int smbfs_lookup(vnode_t *, char *, vnode_t **, struct pathname *, 136 int, vnode_t *, cred_t *, caller_context_t *, 137 int *, pathname_t *); 138 static int smbfs_create(vnode_t *, char *, struct vattr *, enum vcexcl, 139 int, vnode_t **, cred_t *, int, caller_context_t *, 140 vsecattr_t *); 141 static int smbfs_remove(vnode_t *, char *, cred_t *, caller_context_t *, 142 int); 143 static int smbfs_rename(vnode_t *, char *, vnode_t *, char *, cred_t *, 144 caller_context_t *, int); 145 static int smbfs_mkdir(vnode_t *, char *, struct vattr *, vnode_t **, 146 cred_t *, caller_context_t *, int, vsecattr_t *); 147 static int smbfs_rmdir(vnode_t *, char *, vnode_t *, cred_t *, 148 caller_context_t *, int); 149 static int smbfs_readdir(vnode_t *, struct uio *, cred_t *, int *, 150 caller_context_t *, int); 151 static int smbfs_rwlock(vnode_t *, int, caller_context_t *); 152 static void smbfs_rwunlock(vnode_t *, int, caller_context_t *); 153 static int smbfs_seek(vnode_t *, offset_t, offset_t *, caller_context_t *); 154 static int smbfs_frlock(vnode_t *, int, struct flock64 *, int, offset_t, 155 struct flk_callback *, cred_t *, caller_context_t *); 156 static int smbfs_space(vnode_t *, int, struct flock64 *, int, offset_t, 157 cred_t *, caller_context_t *); 158 static int smbfs_pathconf(vnode_t *, int, ulong_t *, cred_t *, 159 caller_context_t *); 160 static int smbfs_setsecattr(vnode_t *, vsecattr_t *, int, cred_t *, 161 caller_context_t *); 162 static int smbfs_getsecattr(vnode_t *, vsecattr_t *, int, cred_t *, 163 caller_context_t *); 164 static int smbfs_shrlock(vnode_t *, int, struct shrlock *, int, cred_t *, 165 caller_context_t *); 166 167 /* Dummy function to use until correct function is ported in */ 168 int noop_vnodeop() { 169 return (0); 170 } 171 172 struct vnodeops *smbfs_vnodeops = NULL; 173 174 /* 175 * Most unimplemented ops will return ENOSYS because of fs_nosys(). 176 * The only ops where that won't work are ACCESS (due to open(2) 177 * failures) and ... (anything else left?) 178 */ 179 const fs_operation_def_t smbfs_vnodeops_template[] = { 180 { VOPNAME_OPEN, { .vop_open = smbfs_open } }, 181 { VOPNAME_CLOSE, { .vop_close = smbfs_close } }, 182 { VOPNAME_READ, { .vop_read = smbfs_read } }, 183 { VOPNAME_WRITE, { .vop_write = smbfs_write } }, 184 { VOPNAME_IOCTL, { .vop_ioctl = smbfs_ioctl } }, 185 { VOPNAME_GETATTR, { .vop_getattr = smbfs_getattr } }, 186 { VOPNAME_SETATTR, { .vop_setattr = smbfs_setattr } }, 187 { VOPNAME_ACCESS, { .vop_access = smbfs_access } }, 188 { VOPNAME_LOOKUP, { .vop_lookup = smbfs_lookup } }, 189 { VOPNAME_CREATE, { .vop_create = smbfs_create } }, 190 { VOPNAME_REMOVE, { .vop_remove = smbfs_remove } }, 191 { VOPNAME_LINK, { .error = fs_nosys } }, /* smbfs_link, */ 192 { VOPNAME_RENAME, { .vop_rename = smbfs_rename } }, 193 { VOPNAME_MKDIR, { .vop_mkdir = smbfs_mkdir } }, 194 { VOPNAME_RMDIR, { .vop_rmdir = smbfs_rmdir } }, 195 { VOPNAME_READDIR, { .vop_readdir = smbfs_readdir } }, 196 { VOPNAME_SYMLINK, { .error = fs_nosys } }, /* smbfs_symlink, */ 197 { VOPNAME_READLINK, { .error = fs_nosys } }, /* smbfs_readlink, */ 198 { VOPNAME_FSYNC, { .vop_fsync = smbfs_fsync } }, 199 { VOPNAME_INACTIVE, { .vop_inactive = smbfs_inactive } }, 200 { VOPNAME_FID, { .error = fs_nosys } }, /* smbfs_fid, */ 201 { VOPNAME_RWLOCK, { .vop_rwlock = smbfs_rwlock } }, 202 { VOPNAME_RWUNLOCK, { .vop_rwunlock = smbfs_rwunlock } }, 203 { VOPNAME_SEEK, { .vop_seek = smbfs_seek } }, 204 { VOPNAME_FRLOCK, { .vop_frlock = smbfs_frlock } }, 205 { VOPNAME_SPACE, { .vop_space = smbfs_space } }, 206 { VOPNAME_REALVP, { .error = fs_nosys } }, /* smbfs_realvp, */ 207 { VOPNAME_GETPAGE, { .error = fs_nosys } }, /* smbfs_getpage, */ 208 { VOPNAME_PUTPAGE, { .error = fs_nosys } }, /* smbfs_putpage, */ 209 { VOPNAME_MAP, { .error = fs_nosys } }, /* smbfs_map, */ 210 { VOPNAME_ADDMAP, { .error = fs_nosys } }, /* smbfs_addmap, */ 211 { VOPNAME_DELMAP, { .error = fs_nosys } }, /* smbfs_delmap, */ 212 { VOPNAME_DUMP, { .error = fs_nosys } }, /* smbfs_dump, */ 213 { VOPNAME_PATHCONF, { .vop_pathconf = smbfs_pathconf } }, 214 { VOPNAME_PAGEIO, { .error = fs_nosys } }, /* smbfs_pageio, */ 215 { VOPNAME_SETSECATTR, { .vop_setsecattr = smbfs_setsecattr } }, 216 { VOPNAME_GETSECATTR, { .vop_getsecattr = smbfs_getsecattr } }, 217 { VOPNAME_SHRLOCK, { .vop_shrlock = smbfs_shrlock } }, 218 { NULL, NULL } 219 }; 220 221 /* 222 * XXX 223 * When new and relevant functionality is enabled, we should be 224 * calling vfs_set_feature() to inform callers that pieces of 225 * functionality are available, per PSARC 2007/227. 226 */ 227 /* ARGSUSED */ 228 static int 229 smbfs_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct) 230 { 231 struct vattr va; 232 smbnode_t *np; 233 vnode_t *vp; 234 u_int32_t rights, rightsrcvd; 235 u_int16_t fid, oldfid; 236 struct smb_cred scred; 237 smbmntinfo_t *smi; 238 cred_t *oldcr; 239 int attrcacheupdated = 0; 240 int tmperror; 241 int error = 0; 242 243 vp = *vpp; 244 np = VTOSMB(vp); 245 smi = VTOSMI(vp); 246 247 if (curproc->p_zone != smi->smi_zone) 248 return (EIO); 249 250 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 251 return (EIO); 252 253 if (vp->v_type != VREG && vp->v_type != VDIR) { /* XXX VLNK? */ 254 SMBVDEBUG("open eacces vtype=%d\n", vp->v_type); 255 return (EACCES); 256 } 257 258 /* 259 * Get exclusive access to n_fid and related stuff. 260 * No returns after this until out. 261 */ 262 if (smbfs_rw_enter_sig(&np->r_lkserlock, RW_WRITER, SMBINTR(vp))) 263 return (EINTR); 264 smb_credinit(&scred, curproc, cr); 265 266 /* 267 * Keep track of the vnode type at first open. 268 * It may change later, and we need close to do 269 * cleanup for the type we opened. Also deny 270 * open of new types until old type is closed. 271 * XXX: Per-open instance nodes whould help. 272 */ 273 if (np->n_ovtype == VNON) { 274 ASSERT(np->n_dirrefs == 0); 275 ASSERT(np->n_fidrefs == 0); 276 } else if (np->n_ovtype != vp->v_type) { 277 SMBVDEBUG("open n_ovtype=%d v_type=%d\n", 278 np->n_ovtype, vp->v_type); 279 error = EACCES; 280 goto out; 281 } 282 283 /* 284 * Directory open is easy. 285 */ 286 if (vp->v_type == VDIR) { 287 np->n_dirrefs++; 288 goto have_fid; 289 } 290 291 /* 292 * If caller specified O_TRUNC/FTRUNC, then be sure to set 293 * FWRITE (to drive successful setattr(size=0) after open) 294 */ 295 if (flag & FTRUNC) 296 flag |= FWRITE; 297 298 /* 299 * If we already have it open, check to see if current rights 300 * are sufficient for this open. 301 */ 302 if (np->n_fidrefs) { 303 int upgrade = 0; 304 305 /* BEGIN CSTYLED */ 306 if ((flag & FWRITE) && 307 !(np->n_rights & (SA_RIGHT_FILE_WRITE_DATA | 308 GENERIC_RIGHT_ALL_ACCESS | 309 GENERIC_RIGHT_WRITE_ACCESS))) 310 upgrade = 1; 311 if ((flag & FREAD) && 312 !(np->n_rights & (SA_RIGHT_FILE_READ_DATA | 313 GENERIC_RIGHT_ALL_ACCESS | 314 GENERIC_RIGHT_READ_ACCESS))) 315 upgrade = 1; 316 /* END CSTYLED */ 317 if (!upgrade) { 318 /* 319 * the existing open is good enough 320 */ 321 np->n_fidrefs++; 322 goto have_fid; 323 } 324 } 325 rights = np->n_fidrefs ? np->n_rights : 0; 326 327 /* 328 * we always ask for READ_CONTROL so we can always get the 329 * owner/group IDs to satisfy a stat. Ditto attributes. 330 * XXX: verify that works with "drop boxes" 331 */ 332 rights |= (STD_RIGHT_READ_CONTROL_ACCESS | 333 SA_RIGHT_FILE_READ_ATTRIBUTES); 334 if ((flag & FREAD)) 335 rights |= SA_RIGHT_FILE_READ_DATA; 336 if ((flag & FWRITE)) 337 rights |= SA_RIGHT_FILE_APPEND_DATA | SA_RIGHT_FILE_WRITE_DATA; 338 339 /* XXX: open gets the current size, but we don't use it. */ 340 error = smbfs_smb_open(np, rights, &scred, &attrcacheupdated, &fid, 341 NULL, 0, 0, NULL, &rightsrcvd); 342 if (error) 343 goto out; 344 345 /* 346 * We have a new FID and access rights. 347 */ 348 oldfid = np->n_fid; 349 np->n_fid = fid; 350 np->n_rights = rightsrcvd; 351 np->n_fidrefs++; 352 if (np->n_fidrefs > 1) { 353 /* 354 * We already had it open (presumably because 355 * it was open with insufficient rights.) 356 * Close old wire-open. 357 */ 358 tmperror = smbfs_smb_close(smi->smi_share, 359 oldfid, &np->n_mtime, &scred); 360 if (tmperror) 361 SMBVDEBUG("error %d closing %s\n", 362 tmperror, np->n_rpath); 363 } 364 365 /* 366 * This thread did the open. 367 * Save our credentials too. 368 */ 369 mutex_enter(&np->r_statelock); 370 oldcr = np->r_cred; 371 np->r_cred = cr; 372 crhold(cr); 373 if (oldcr) 374 crfree(oldcr); 375 mutex_exit(&np->r_statelock); 376 377 have_fid: 378 /* 379 * Keep track of the vnode type at first open. 380 * (see comments above) 381 */ 382 if (np->n_ovtype == VNON) 383 np->n_ovtype = vp->v_type; 384 385 /* Get attributes (maybe). */ 386 387 /* Darwin (derived) code. */ 388 389 va.va_mask = AT_MTIME; 390 if (np->n_flag & NMODIFIED) 391 smbfs_attr_cacheremove(np); 392 393 /* 394 * Try to get attributes, but don't bail on error. 395 * We already hold r_lkserlock/reader so note: 396 * this call will recursively take r_lkserlock. 397 */ 398 tmperror = smbfsgetattr(vp, &va, cr); 399 if (tmperror) 400 SMBERROR("getattr failed, error=%d", tmperror); 401 else 402 np->n_mtime.tv_sec = va.va_mtime.tv_sec; 403 404 out: 405 smb_credrele(&scred); 406 smbfs_rw_exit(&np->r_lkserlock); 407 return (error); 408 } 409 410 /*ARGSUSED*/ 411 static int 412 smbfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr, 413 caller_context_t *ct) 414 { 415 smbnode_t *np; 416 int error = 0; 417 struct smb_cred scred; 418 419 np = VTOSMB(vp); 420 421 /* 422 * Don't "bail out" for VFS_UNMOUNTED here, 423 * as we want to do cleanup, etc. 424 */ 425 426 /* 427 * zone_enter(2) prevents processes from changing zones with SMBFS files 428 * open; if we happen to get here from the wrong zone we can't do 429 * anything over the wire. 430 */ 431 if (VTOSMI(vp)->smi_zone != curproc->p_zone) { 432 /* 433 * We could attempt to clean up locks, except we're sure 434 * that the current process didn't acquire any locks on 435 * the file: any attempt to lock a file belong to another zone 436 * will fail, and one can't lock an SMBFS file and then change 437 * zones, as that fails too. 438 * 439 * Returning an error here is the sane thing to do. A 440 * subsequent call to VN_RELE() which translates to a 441 * smbfs_inactive() will clean up state: if the zone of the 442 * vnode's origin is still alive and kicking, an async worker 443 * thread will handle the request (from the correct zone), and 444 * everything (minus the final smbfs_getattr_otw() call) should 445 * be OK. If the zone is going away smbfs_async_inactive() will 446 * throw away cached pages inline. 447 */ 448 return (EIO); 449 } 450 451 /* 452 * If we are using local locking for this filesystem, then 453 * release all of the SYSV style record locks. Otherwise, 454 * we are doing network locking and we need to release all 455 * of the network locks. All of the locks held by this 456 * process on this file are released no matter what the 457 * incoming reference count is. 458 */ 459 if (VTOSMI(vp)->smi_flags & SMI_LLOCK) { 460 cleanlocks(vp, ttoproc(curthread)->p_pid, 0); 461 cleanshares(vp, ttoproc(curthread)->p_pid); 462 } 463 464 if (count > 1) 465 return (0); 466 /* 467 * OK, do "last close" stuff. 468 */ 469 470 471 /* 472 * Do the CIFS close. 473 * Darwin code 474 */ 475 476 /* 477 * Exclusive lock for modifying n_fid stuff. 478 * Don't want this one ever interruptible. 479 */ 480 (void) smbfs_rw_enter_sig(&np->r_lkserlock, RW_WRITER, 0); 481 smb_credinit(&scred, curproc, cr); 482 483 error = 0; 484 485 /* 486 * Note that vp->v_type may change if a remote node 487 * is deleted and recreated as a different type, and 488 * our getattr may change v_type accordingly. 489 * Now use n_ovtype to keep track of the v_type 490 * we had during open (see comments above). 491 */ 492 if (np->n_ovtype == VDIR) { 493 struct smbfs_fctx *fctx; 494 ASSERT(np->n_dirrefs > 0); 495 if (--np->n_dirrefs) 496 goto out; 497 if ((fctx = np->n_dirseq) != NULL) { 498 np->n_dirseq = NULL; 499 error = smbfs_smb_findclose(fctx, &scred); 500 } 501 } else { 502 uint16_t ofid; 503 ASSERT(np->n_fidrefs > 0); 504 if (--np->n_fidrefs) 505 goto out; 506 if ((ofid = np->n_fid) != SMB_FID_UNUSED) { 507 np->n_fid = SMB_FID_UNUSED; 508 error = smbfs_smb_close(np->n_mount->smi_share, 509 ofid, NULL, &scred); 510 } 511 } 512 if (error) { 513 SMBERROR("error %d closing %s\n", 514 error, np->n_rpath); 515 } 516 517 /* Allow next open to use any v_type. */ 518 np->n_ovtype = VNON; 519 520 if (np->n_flag & NATTRCHANGED) 521 smbfs_attr_cacheremove(np); 522 523 out: 524 smb_credrele(&scred); 525 smbfs_rw_exit(&np->r_lkserlock); 526 527 /* don't return any errors */ 528 return (0); 529 } 530 531 /* ARGSUSED */ 532 static int 533 smbfs_read(vnode_t *vp, struct uio *uiop, int ioflag, cred_t *cr, 534 caller_context_t *ct) 535 { 536 smbmntinfo_t *smi; 537 smbnode_t *np; 538 struct smb_cred scred; 539 struct vattr va; 540 /* u_offset_t off; */ 541 /* offset_t diff; */ 542 offset_t endoff; 543 ssize_t past_eof; 544 int error; 545 546 np = VTOSMB(vp); 547 smi = VTOSMI(vp); 548 549 if (curproc->p_zone != smi->smi_zone) 550 return (EIO); 551 552 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 553 return (EIO); 554 555 ASSERT(smbfs_rw_lock_held(&np->r_rwlock, RW_READER)); 556 557 if (vp->v_type != VREG) 558 return (EISDIR); 559 560 if (uiop->uio_resid == 0) 561 return (0); 562 563 /* 564 * Like NFS3, just check for 63-bit overflow. 565 * Our SMB layer takes care to return EFBIG 566 * when it has to fallback to a 32-bit call. 567 */ 568 if (uiop->uio_loffset < 0 || 569 uiop->uio_loffset + uiop->uio_resid < 0) 570 return (EINVAL); 571 572 /* get vnode attributes from server */ 573 va.va_mask = AT_SIZE | AT_MTIME; 574 if (error = smbfsgetattr(vp, &va, cr)) 575 return (error); 576 577 /* Update mtime with mtime from server here? */ 578 579 /* if offset is beyond EOF, read nothing */ 580 if (uiop->uio_loffset >= va.va_size) 581 return (0); 582 583 /* 584 * Limit the read to the remaining file size. 585 * Do this by temporarily reducing uio_resid 586 * by the amount the lies beyoned the EOF. 587 */ 588 endoff = uiop->uio_loffset + uiop->uio_resid; 589 if (endoff > va.va_size) { 590 past_eof = (ssize_t)(endoff - va.va_size); 591 uiop->uio_resid -= past_eof; 592 } else 593 past_eof = 0; 594 595 /* Shared lock for n_fid use in smb_rwuio */ 596 if (smbfs_rw_enter_sig(&np->r_lkserlock, RW_READER, SMBINTR(vp))) 597 return (EINTR); 598 smb_credinit(&scred, curproc, cr); 599 600 error = smb_rwuio(smi->smi_share, np->n_fid, UIO_READ, uiop, 601 &scred, smb_timo_read); 602 603 smb_credrele(&scred); 604 smbfs_rw_exit(&np->r_lkserlock); 605 606 /* undo adjustment of resid */ 607 uiop->uio_resid += past_eof; 608 609 return (error); 610 } 611 612 613 /* ARGSUSED */ 614 static int 615 smbfs_write(vnode_t *vp, struct uio *uiop, int ioflag, cred_t *cr, 616 caller_context_t *ct) 617 { 618 smbmntinfo_t *smi; 619 smbnode_t *np; 620 struct smb_cred scred; 621 struct vattr va; 622 offset_t endoff, limit; 623 ssize_t past_limit; 624 int error, timo; 625 626 np = VTOSMB(vp); 627 smi = VTOSMI(vp); 628 629 if (curproc->p_zone != smi->smi_zone) 630 return (EIO); 631 632 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 633 return (EIO); 634 635 ASSERT(smbfs_rw_lock_held(&np->r_rwlock, RW_WRITER)); 636 637 if (vp->v_type != VREG) 638 return (EISDIR); 639 640 if (uiop->uio_resid == 0) 641 return (0); 642 643 /* 644 * Handle ioflag bits: (FAPPEND|FSYNC|FDSYNC) 645 */ 646 if (ioflag & (FAPPEND | FSYNC)) { 647 if (np->n_flag & NMODIFIED) { 648 smbfs_attr_cacheremove(np); 649 /* XXX: smbfs_vinvalbuf? */ 650 } 651 } 652 if (ioflag & FAPPEND) { 653 /* 654 * File size can be changed by another client 655 */ 656 va.va_mask = AT_SIZE; 657 if (error = smbfsgetattr(vp, &va, cr)) 658 return (error); 659 uiop->uio_loffset = va.va_size; 660 } 661 662 /* 663 * Like NFS3, just check for 63-bit overflow. 664 */ 665 endoff = uiop->uio_loffset + uiop->uio_resid; 666 if (uiop->uio_loffset < 0 || endoff < 0) 667 return (EINVAL); 668 669 /* 670 * Check to make sure that the process will not exceed 671 * its limit on file size. It is okay to write up to 672 * the limit, but not beyond. Thus, the write which 673 * reaches the limit will be short and the next write 674 * will return an error. 675 * 676 * So if we're starting at or beyond the limit, EFBIG. 677 * Otherwise, temporarily reduce resid to the amount 678 * the falls after the limit. 679 */ 680 limit = uiop->uio_llimit; 681 if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 682 limit = MAXOFFSET_T; 683 if (uiop->uio_loffset >= limit) 684 return (EFBIG); 685 if (endoff > limit) { 686 past_limit = (ssize_t)(endoff - limit); 687 uiop->uio_resid -= past_limit; 688 } else 689 past_limit = 0; 690 691 /* Timeout: longer for append. */ 692 timo = smb_timo_write; 693 if (endoff > np->n_size) 694 timo = smb_timo_append; 695 696 /* Shared lock for n_fid use in smb_rwuio */ 697 if (smbfs_rw_enter_sig(&np->r_lkserlock, RW_READER, SMBINTR(vp))) 698 return (EINTR); 699 smb_credinit(&scred, curproc, cr); 700 701 error = smb_rwuio(smi->smi_share, np->n_fid, UIO_WRITE, uiop, 702 &scred, timo); 703 704 if (error == 0) { 705 mutex_enter(&np->r_statelock); 706 np->n_flag |= (NFLUSHWIRE | NATTRCHANGED); 707 if (uiop->uio_loffset > (offset_t)np->n_size) 708 np->n_size = (len_t)uiop->uio_loffset; 709 mutex_exit(&np->r_statelock); 710 if (ioflag & (FSYNC|FDSYNC)) { 711 /* Don't error the I/O if this fails. */ 712 (void) smbfs_smb_flush(np, &scred); 713 } 714 } 715 716 smb_credrele(&scred); 717 smbfs_rw_exit(&np->r_lkserlock); 718 719 /* undo adjustment of resid */ 720 uiop->uio_resid += past_limit; 721 722 return (error); 723 } 724 725 726 /* ARGSUSED */ 727 static int 728 smbfs_ioctl(vnode_t *vp, int cmd, intptr_t arg, int flag, 729 cred_t *cr, int *rvalp, caller_context_t *ct) 730 { 731 int error; 732 smbmntinfo_t *smi; 733 734 smi = VTOSMI(vp); 735 736 if (curproc->p_zone != smi->smi_zone) 737 return (EIO); 738 739 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 740 return (EIO); 741 742 switch (cmd) { 743 /* First three from ZFS. XXX - need these? */ 744 745 case _FIOFFS: 746 error = smbfs_fsync(vp, 0, cr, ct); 747 break; 748 749 /* 750 * The following two ioctls are used by bfu. 751 * Silently ignore to avoid bfu errors. 752 */ 753 case _FIOGDIO: 754 case _FIOSDIO: 755 error = 0; 756 break; 757 758 #ifdef NOT_YET /* XXX - from the NFS code. */ 759 case _FIODIRECTIO: 760 error = smbfs_directio(vp, (int)arg, cr); 761 #endif 762 763 /* 764 * Allow get/set with "raw" security descriptor (SD) data. 765 * Useful for testing, diagnosing idmap problems, etc. 766 */ 767 case SMBFSIO_GETSD: 768 error = smbfs_ioc_getsd(vp, arg, flag, cr); 769 break; 770 771 case SMBFSIO_SETSD: 772 error = smbfs_ioc_setsd(vp, arg, flag, cr); 773 break; 774 775 default: 776 error = ENOTTY; 777 break; 778 } 779 780 return (error); 781 } 782 783 784 /* 785 * Return either cached or remote attributes. If get remote attr 786 * use them to check and invalidate caches, then cache the new attributes. 787 * 788 * XXX 789 * This op should eventually support PSARC 2007/315, Extensible Attribute 790 * Interfaces, for richer metadata. 791 */ 792 /* ARGSUSED */ 793 static int 794 smbfs_getattr(vnode_t *vp, struct vattr *vap, int flags, cred_t *cr, 795 caller_context_t *ct) 796 { 797 smbnode_t *np; 798 smbmntinfo_t *smi; 799 800 smi = VTOSMI(vp); 801 802 if (curproc->p_zone != smi->smi_zone) 803 return (EIO); 804 805 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 806 return (EIO); 807 808 /* 809 * If it has been specified that the return value will 810 * just be used as a hint, and we are only being asked 811 * for size, fsid or rdevid, then return the client's 812 * notion of these values without checking to make sure 813 * that the attribute cache is up to date. 814 * The whole point is to avoid an over the wire GETATTR 815 * call. 816 */ 817 np = VTOSMB(vp); 818 if (flags & ATTR_HINT) { 819 if (vap->va_mask == 820 (vap->va_mask & (AT_SIZE | AT_FSID | AT_RDEV))) { 821 mutex_enter(&np->r_statelock); 822 if (vap->va_mask | AT_SIZE) 823 vap->va_size = np->r_size; 824 if (vap->va_mask | AT_FSID) 825 vap->va_fsid = np->r_attr.va_fsid; 826 if (vap->va_mask | AT_RDEV) 827 vap->va_rdev = np->r_attr.va_rdev; 828 mutex_exit(&np->r_statelock); 829 return (0); 830 } 831 } 832 833 834 return (smbfsgetattr(vp, vap, cr)); 835 } 836 837 /* 838 * Mostly from Darwin smbfs_getattr() 839 */ 840 int 841 smbfsgetattr(vnode_t *vp, struct vattr *vap, cred_t *cr) 842 { 843 int error; 844 smbnode_t *np; 845 struct smb_cred scred; 846 struct smbfattr fattr; 847 848 ASSERT(curproc->p_zone == VTOSMI(vp)->smi_zone); 849 850 np = VTOSMB(vp); 851 852 /* 853 * If we've got cached attributes, we're done, otherwise go 854 * to the server to get attributes, which will update the cache 855 * in the process. 856 * 857 * This section from Darwin smbfs_getattr, 858 * but then modified a lot. 859 */ 860 error = smbfs_attr_cachelookup(vp, vap); 861 if (error != ENOENT) 862 return (error); 863 864 /* Shared lock for (possible) n_fid use. */ 865 if (smbfs_rw_enter_sig(&np->r_lkserlock, RW_READER, SMBINTR(vp))) 866 return (EINTR); 867 smb_credinit(&scred, curproc, cr); 868 869 bzero(&fattr, sizeof (fattr)); 870 error = smbfs_smb_getfattr(np, &fattr, &scred); 871 872 smb_credrele(&scred); 873 smbfs_rw_exit(&np->r_lkserlock); 874 875 if (!error) { 876 smbfs_attr_cacheenter(vp, &fattr); 877 error = smbfs_attr_cachelookup(vp, vap); 878 } 879 return (error); 880 } 881 882 /* 883 * XXX 884 * This op should eventually support PSARC 2007/315, Extensible Attribute 885 * Interfaces, for richer metadata. 886 */ 887 /*ARGSUSED4*/ 888 static int 889 smbfs_setattr(vnode_t *vp, struct vattr *vap, int flags, cred_t *cr, 890 caller_context_t *ct) 891 { 892 int error; 893 uint_t mask; 894 struct vattr oldva; 895 smbmntinfo_t *smi; 896 897 smi = VTOSMI(vp); 898 899 if (curproc->p_zone != smi->smi_zone) 900 return (EIO); 901 902 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 903 return (EIO); 904 905 mask = vap->va_mask; 906 if (mask & AT_NOSET) 907 return (EINVAL); 908 909 oldva.va_mask = AT_TYPE | AT_MODE | AT_UID | AT_GID; 910 error = smbfsgetattr(vp, &oldva, cr); 911 if (error) 912 return (error); 913 914 error = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 915 smbfs_accessx, vp); 916 if (error) 917 return (error); 918 919 return (smbfssetattr(vp, vap, flags, cr)); 920 } 921 922 /* 923 * Mostly from Darwin smbfs_setattr() 924 * but then modified a lot. 925 */ 926 /* ARGSUSED */ 927 static int 928 smbfssetattr(vnode_t *vp, struct vattr *vap, int flags, cred_t *cr) 929 { 930 int error = 0; 931 smbnode_t *np = VTOSMB(vp); 932 smbmntinfo_t *smi = VTOSMI(vp); 933 uint_t mask = vap->va_mask; 934 struct timespec *mtime, *atime; 935 struct smb_cred scred; 936 int cerror, modified = 0; 937 unsigned short fid; 938 int have_fid = 0; 939 uint32_t rights = 0; 940 941 ASSERT(curproc->p_zone == smi->smi_zone); 942 943 /* 944 * There are no settable attributes on the XATTR dir, 945 * so just silently ignore these. On XATTR files, 946 * you can set the size but nothing else. 947 */ 948 if (vp->v_flag & V_XATTRDIR) 949 return (0); 950 if (np->n_flag & N_XATTR) { 951 if (mask & AT_TIMES) 952 SMBVDEBUG("ignore set time on xattr\n"); 953 mask &= AT_SIZE; 954 } 955 956 /* 957 * If our caller is trying to set multiple attributes, they 958 * can make no assumption about what order they are done in. 959 * Here we try to do them in order of decreasing likelihood 960 * of failure, just to minimize the chance we'll wind up 961 * with a partially complete request. 962 */ 963 964 /* Shared lock for (possible) n_fid use. */ 965 if (smbfs_rw_enter_sig(&np->r_lkserlock, RW_READER, SMBINTR(vp))) 966 return (EINTR); 967 smb_credinit(&scred, curproc, cr); 968 969 /* 970 * Will we need an open handle for this setattr? 971 * If so, what rights will we need? 972 */ 973 if (mask & (AT_ATIME | AT_MTIME)) { 974 rights |= 975 SA_RIGHT_FILE_WRITE_ATTRIBUTES | 976 GENERIC_RIGHT_ALL_ACCESS | 977 GENERIC_RIGHT_WRITE_ACCESS; 978 } 979 if (mask & AT_SIZE) { 980 rights |= 981 SA_RIGHT_FILE_WRITE_DATA | 982 SA_RIGHT_FILE_APPEND_DATA; 983 /* 984 * Only SIZE requires a handle. 985 * XXX May be more reliable to just 986 * always get the file handle here. 987 */ 988 error = smbfs_smb_tmpopen(np, rights, &scred, &fid); 989 if (error) { 990 SMBVDEBUG("error %d opening %s\n", 991 error, np->n_rpath); 992 goto out; 993 } 994 have_fid = 1; 995 } 996 997 998 /* 999 * If the server supports the UNIX extensions, right here is where 1000 * we'd support changes to uid, gid, mode, and possibly va_flags. 1001 * For now we claim to have made any such changes. 1002 */ 1003 1004 if (mask & AT_SIZE) { 1005 /* 1006 * If the new file size is less than what the client sees as 1007 * the file size, then just change the size and invalidate 1008 * the pages. 1009 * I am commenting this code at present because the function 1010 * smbfs_putapage() is not yet implemented. 1011 */ 1012 1013 /* 1014 * Set the file size to vap->va_size. 1015 */ 1016 ASSERT(have_fid); 1017 error = smbfs_smb_setfsize(np, fid, vap->va_size, &scred); 1018 if (error) { 1019 SMBVDEBUG("setsize error %d file %s\n", 1020 error, np->n_rpath); 1021 } else { 1022 /* 1023 * Darwin had code here to zero-extend. 1024 * Tests indicate the server will zero-fill, 1025 * so looks like we don't need to do this. 1026 * Good thing, as this could take forever. 1027 */ 1028 mutex_enter(&np->r_statelock); 1029 np->r_size = vap->va_size; 1030 mutex_exit(&np->r_statelock); 1031 modified = 1; 1032 } 1033 } 1034 1035 /* 1036 * XXX: When Solaris has create_time, set that too. 1037 * Note: create_time is different from ctime. 1038 */ 1039 mtime = ((mask & AT_MTIME) ? &vap->va_mtime : 0); 1040 atime = ((mask & AT_ATIME) ? &vap->va_atime : 0); 1041 1042 if (mtime || atime) { 1043 /* 1044 * If file is opened with write-attributes capability, 1045 * we use handle-based calls. If not, we use path-based ones. 1046 */ 1047 if (have_fid) { 1048 error = smbfs_smb_setfattr(np, fid, 1049 np->n_dosattr, mtime, atime, &scred); 1050 } else { 1051 error = smbfs_smb_setpattr(np, 1052 np->n_dosattr, mtime, atime, &scred); 1053 } 1054 if (error) { 1055 SMBVDEBUG("set times error %d file %s\n", 1056 error, np->n_rpath); 1057 } else { 1058 /* XXX: set np->n_mtime, etc? */ 1059 modified = 1; 1060 } 1061 } 1062 1063 out: 1064 if (modified) { 1065 /* 1066 * Invalidate attribute cache in case if server doesn't set 1067 * required attributes. 1068 */ 1069 smbfs_attr_cacheremove(np); 1070 /* 1071 * XXX Darwin called _getattr here to 1072 * update the mtime. Should we? 1073 */ 1074 } 1075 1076 if (have_fid) { 1077 cerror = smbfs_smb_tmpclose(np, fid, &scred); 1078 if (cerror) 1079 SMBERROR("error %d closing %s\n", 1080 cerror, np->n_rpath); 1081 } 1082 1083 smb_credrele(&scred); 1084 smbfs_rw_exit(&np->r_lkserlock); 1085 1086 return (error); 1087 } 1088 1089 /* 1090 * smbfs_access_rwx() 1091 * Common function for smbfs_access, etc. 1092 * 1093 * The security model implemented by the FS is unusual 1094 * due to our "single user mounts" restriction. 1095 * 1096 * All access under a given mount point uses the CIFS 1097 * credentials established by the owner of the mount. 1098 * The Unix uid/gid/mode information is not (easily) 1099 * provided by CIFS, and is instead fabricated using 1100 * settings held in the mount structure. 1101 * 1102 * Most access checking is handled by the CIFS server, 1103 * but we need sufficient Unix access checks here to 1104 * prevent other local Unix users from having access 1105 * to objects under this mount that the uid/gid/mode 1106 * settings in the mount would not allow. 1107 * 1108 * With this model, there is a case where we need the 1109 * ability to do an access check before we have the 1110 * vnode for an object. This function takes advantage 1111 * of the fact that the uid/gid/mode is per mount, and 1112 * avoids the need for a vnode. 1113 * 1114 * We still (sort of) need a vnode when we call 1115 * secpolicy_vnode_access, but that only uses 1116 * the vtype field, so we can use a pair of fake 1117 * vnodes that have only v_type filled in. 1118 * 1119 * XXX: Later, add a new secpolicy_vtype_access() 1120 * that takes the vtype instead of a vnode, and 1121 * get rid of the tmpl_vxxx fake vnodes below. 1122 */ 1123 static int 1124 smbfs_access_rwx(vfs_t *vfsp, int vtype, int mode, cred_t *cr) 1125 { 1126 /* See the secpolicy call below. */ 1127 static const vnode_t tmpl_vdir = { .v_type = VDIR }; 1128 static const vnode_t tmpl_vreg = { .v_type = VREG }; 1129 vattr_t va; 1130 vnode_t *tvp; 1131 struct smbmntinfo *smi = VFTOSMI(vfsp); 1132 int shift = 0; 1133 1134 /* 1135 * Build our (fabricated) vnode attributes. 1136 * XXX: Could make these templates in the 1137 * per-mount struct and use them here. 1138 */ 1139 bzero(&va, sizeof (va)); 1140 va.va_mask = AT_TYPE | AT_MODE | AT_UID | AT_GID; 1141 va.va_type = vtype; 1142 va.va_mode = (vtype == VDIR) ? 1143 smi->smi_args.dir_mode : 1144 smi->smi_args.file_mode; 1145 va.va_uid = smi->smi_args.uid; 1146 va.va_gid = smi->smi_args.gid; 1147 1148 /* 1149 * Disallow write attempts on read-only file systems, 1150 * unless the file is a device or fifo node. Note: 1151 * Inline vn_is_readonly and IS_DEVVP here because 1152 * we may not have a vnode ptr. Original expr. was: 1153 * (mode & VWRITE) && vn_is_readonly(vp) && !IS_DEVVP(vp)) 1154 */ 1155 if ((mode & VWRITE) && 1156 (vfsp->vfs_flag & VFS_RDONLY) && 1157 !(vtype == VCHR || vtype == VBLK || vtype == VFIFO)) 1158 return (EROFS); 1159 1160 /* 1161 * Disallow attempts to access mandatory lock files. 1162 * Similarly, expand MANDLOCK here. 1163 * XXX: not sure we need this. 1164 */ 1165 if ((mode & (VWRITE | VREAD | VEXEC)) && 1166 va.va_type == VREG && MANDMODE(va.va_mode)) 1167 return (EACCES); 1168 1169 /* 1170 * Access check is based on only 1171 * one of owner, group, public. 1172 * If not owner, then check group. 1173 * If not a member of the group, 1174 * then check public access. 1175 */ 1176 if (crgetuid(cr) != va.va_uid) { 1177 shift += 3; 1178 if (!groupmember(va.va_gid, cr)) 1179 shift += 3; 1180 } 1181 mode &= ~(va.va_mode << shift); 1182 if (mode == 0) 1183 return (0); 1184 1185 /* 1186 * We need a vnode for secpolicy_vnode_access, 1187 * but the only thing it looks at is v_type, 1188 * so pass one of the templates above. 1189 */ 1190 tvp = (va.va_type == VDIR) ? 1191 (vnode_t *)&tmpl_vdir : 1192 (vnode_t *)&tmpl_vreg; 1193 return (secpolicy_vnode_access(cr, tvp, va.va_uid, mode)); 1194 } 1195 1196 /* 1197 * See smbfs_setattr 1198 */ 1199 static int 1200 smbfs_accessx(void *arg, int mode, cred_t *cr) 1201 { 1202 vnode_t *vp = arg; 1203 /* 1204 * Note: The caller has checked the current zone, 1205 * the SMI_DEAD and VFS_UNMOUNTED flags, etc. 1206 */ 1207 return (smbfs_access_rwx(vp->v_vfsp, vp->v_type, mode, cr)); 1208 } 1209 1210 /* 1211 * XXX 1212 * This op should support PSARC 2007/403, Modified Access Checks for CIFS 1213 */ 1214 /* ARGSUSED */ 1215 static int 1216 smbfs_access(vnode_t *vp, int mode, int flags, cred_t *cr, caller_context_t *ct) 1217 { 1218 vfs_t *vfsp; 1219 smbmntinfo_t *smi; 1220 1221 vfsp = vp->v_vfsp; 1222 smi = VFTOSMI(vfsp); 1223 1224 if (curproc->p_zone != smi->smi_zone) 1225 return (EIO); 1226 1227 if (smi->smi_flags & SMI_DEAD || vfsp->vfs_flag & VFS_UNMOUNTED) 1228 return (EIO); 1229 1230 return (smbfs_access_rwx(vfsp, vp->v_type, mode, cr)); 1231 } 1232 1233 1234 /* 1235 * Flush local dirty pages to stable storage on the server. 1236 * 1237 * If FNODSYNC is specified, then there is nothing to do because 1238 * metadata changes are not cached on the client before being 1239 * sent to the server. 1240 * 1241 * Currently, this is a no-op since we don't cache data, either. 1242 */ 1243 /* ARGSUSED */ 1244 static int 1245 smbfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct) 1246 { 1247 int error = 0; 1248 smbmntinfo_t *smi; 1249 1250 smi = VTOSMI(vp); 1251 1252 if (curproc->p_zone != smi->smi_zone) 1253 return (EIO); 1254 1255 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 1256 return (EIO); 1257 1258 if ((syncflag & FNODSYNC) || IS_SWAPVP(vp)) 1259 return (0); 1260 1261 return (error); 1262 } 1263 1264 /* 1265 * Last reference to vnode went away. 1266 */ 1267 /* ARGSUSED */ 1268 static void 1269 smbfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) 1270 { 1271 smbnode_t *np; 1272 1273 /* 1274 * Don't "bail out" for VFS_UNMOUNTED here, 1275 * as we want to do cleanup, etc. 1276 * See also pcfs_inactive 1277 */ 1278 1279 np = VTOSMB(vp); 1280 1281 /* 1282 * If this is coming from the wrong zone, we let someone in the right 1283 * zone take care of it asynchronously. We can get here due to 1284 * VN_RELE() being called from pageout() or fsflush(). This call may 1285 * potentially turn into an expensive no-op if, for instance, v_count 1286 * gets incremented in the meantime, but it's still correct. 1287 */ 1288 1289 /* 1290 * Some paranoia from the Darwin code: 1291 * Make sure the FID was closed. 1292 * If we see this, it's a bug! 1293 * 1294 * No rw_enter here, as this should be the 1295 * last ref, and we're just looking... 1296 */ 1297 if (np->n_fidrefs > 0) { 1298 SMBVDEBUG("opencount %d fid %d file %s\n", 1299 np->n_fidrefs, np->n_fid, np->n_rpath); 1300 } 1301 if (np->n_dirrefs > 0) { 1302 uint_t fid = (np->n_dirseq) ? 1303 np->n_dirseq->f_Sid : 0; 1304 SMBVDEBUG("opencount %d fid %d dir %s\n", 1305 np->n_dirrefs, fid, np->n_rpath); 1306 } 1307 1308 smb_addfree(np); 1309 } 1310 1311 /* 1312 * Remote file system operations having to do with directory manipulation. 1313 */ 1314 /* ARGSUSED */ 1315 static int 1316 smbfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp, 1317 int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct, 1318 int *direntflags, pathname_t *realpnp) 1319 { 1320 vfs_t *vfs; 1321 smbmntinfo_t *smi; 1322 smbnode_t *dnp; 1323 int error; 1324 1325 vfs = dvp->v_vfsp; 1326 smi = VFTOSMI(vfs); 1327 1328 if (curproc->p_zone != smi->smi_zone) 1329 return (EPERM); 1330 1331 if (smi->smi_flags & SMI_DEAD || vfs->vfs_flag & VFS_UNMOUNTED) 1332 return (EIO); 1333 1334 dnp = VTOSMB(dvp); 1335 1336 /* 1337 * Are we looking up extended attributes? If so, "dvp" is 1338 * the file or directory for which we want attributes, and 1339 * we need a lookup of the (faked up) attribute directory 1340 * before we lookup the rest of the path. 1341 */ 1342 if (flags & LOOKUP_XATTR) { 1343 /* 1344 * Require the xattr mount option. 1345 */ 1346 if ((vfs->vfs_flag & VFS_XATTR) == 0) 1347 return (EINVAL); 1348 1349 /* 1350 * We don't allow recursive attributes. 1351 */ 1352 if (dnp->n_flag & N_XATTR) 1353 return (EINVAL); 1354 1355 error = smbfs_get_xattrdir(dvp, vpp, cr, flags); 1356 return (error); 1357 } 1358 1359 if (smbfs_rw_enter_sig(&dnp->r_rwlock, RW_READER, SMBINTR(dvp))) { 1360 error = EINTR; 1361 goto out; 1362 } 1363 1364 error = smbfslookup(dvp, nm, vpp, cr, 1, ct); 1365 1366 smbfs_rw_exit(&dnp->r_rwlock); 1367 1368 out: 1369 return (error); 1370 } 1371 1372 /* ARGSUSED */ 1373 static int 1374 smbfslookup(vnode_t *dvp, char *nm, vnode_t **vpp, cred_t *cr, int dnlc, 1375 caller_context_t *ct) 1376 { 1377 int error; 1378 int supplen; /* supported length */ 1379 vnode_t *vp; 1380 smbnode_t *dnp; 1381 smbmntinfo_t *smi; 1382 /* struct smb_vc *vcp; */ 1383 const char *ill; 1384 const char *name = (const char *)nm; 1385 int nmlen = strlen(nm); 1386 int rplen; 1387 struct smb_cred scred; 1388 struct smbfattr fa; 1389 1390 smi = VTOSMI(dvp); 1391 dnp = VTOSMB(dvp); 1392 1393 ASSERT(curproc->p_zone == smi->smi_zone); 1394 1395 #ifdef NOT_YET 1396 vcp = SSTOVC(smi->smi_share); 1397 1398 /* XXX: Should compute this once and store it in smbmntinfo_t */ 1399 supplen = (SMB_DIALECT(vcp) >= SMB_DIALECT_LANMAN2_0) ? 255 : 12; 1400 #else 1401 supplen = 255; 1402 #endif 1403 1404 /* 1405 * RWlock must be held, either reader or writer. 1406 * XXX: Can we check without looking directly 1407 * inside the struct smbfs_rwlock_t? 1408 */ 1409 ASSERT(dnp->r_rwlock.count != 0); 1410 1411 /* 1412 * If lookup is for "", just return dvp. Don't need 1413 * to send it over the wire, look it up in the dnlc, 1414 * or perform any access checks. 1415 */ 1416 if (nmlen == 0) { 1417 VN_HOLD(dvp); 1418 *vpp = dvp; 1419 return (0); 1420 } 1421 1422 /* 1423 * Can't do lookups in non-directories. 1424 */ 1425 if (dvp->v_type != VDIR) 1426 return (ENOTDIR); 1427 1428 /* 1429 * Need search permission in the directory. 1430 */ 1431 error = smbfs_access(dvp, VEXEC, 0, cr, ct); 1432 if (error) 1433 return (error); 1434 1435 /* 1436 * If lookup is for ".", just return dvp. Don't need 1437 * to send it over the wire or look it up in the dnlc, 1438 * just need to check access (done above). 1439 */ 1440 if (nmlen == 1 && name[0] == '.') { 1441 VN_HOLD(dvp); 1442 *vpp = dvp; 1443 return (0); 1444 } 1445 1446 /* 1447 * Now some sanity checks on the name. 1448 * First check the length. 1449 */ 1450 if (nmlen > supplen) 1451 return (ENAMETOOLONG); 1452 1453 /* 1454 * Avoid surprises with characters that are 1455 * illegal in Windows file names. 1456 * Todo: CATIA mappings XXX 1457 */ 1458 ill = illegal_chars; 1459 if (dnp->n_flag & N_XATTR) 1460 ill++; /* allow colon */ 1461 if (strpbrk(nm, ill)) 1462 return (EINVAL); 1463 1464 #ifdef USE_DNLC 1465 if (dnlc) { 1466 /* 1467 * Lookup this name in the DNLC. If there was a valid entry, 1468 * then return the results of the lookup. 1469 */ 1470 error = smbfslookup_dnlc(dvp, nm, vpp, cr); 1471 if (error || *vpp != NULL) 1472 return (error); 1473 } 1474 #endif /* USE_DNLC */ 1475 1476 /* 1477 * Handle lookup of ".." which is quite tricky, 1478 * because the protocol gives us little help. 1479 * 1480 * We keep full pathnames (as seen on the server) 1481 * so we can just trim off the last component to 1482 * get the full pathname of the parent. Note: 1483 * We don't actually copy and modify, but just 1484 * compute the trimmed length and pass that with 1485 * the current dir path (not null terminated). 1486 * 1487 * We don't go over-the-wire to get attributes 1488 * for ".." because we know it's a directory, 1489 * and we can just leave the rest "stale" 1490 * until someone does a getattr. 1491 */ 1492 if (nmlen == 2 && name[0] == '.' && name[1] == '.') { 1493 if (dvp->v_flag & VROOT) { 1494 /* 1495 * Already at the root. This can happen 1496 * with directory listings at the root, 1497 * which lookup "." and ".." to get the 1498 * inode numbers. Let ".." be the same 1499 * as "." in the FS root. 1500 */ 1501 VN_HOLD(dvp); 1502 *vpp = dvp; 1503 return (0); 1504 } 1505 1506 /* 1507 * Special case for XATTR directory 1508 */ 1509 if (dvp->v_flag & V_XATTRDIR) { 1510 error = smbfs_xa_parent(dvp, vpp); 1511 /* Intentionally no dnlc_update */ 1512 return (error); 1513 } 1514 1515 /* 1516 * Find the parent path length. 1517 */ 1518 rplen = dnp->n_rplen; 1519 ASSERT(rplen > 0); 1520 while (--rplen >= 0) { 1521 if (dnp->n_rpath[rplen] == '\\') 1522 break; 1523 } 1524 if (rplen == 0) { 1525 /* Found our way to the root. */ 1526 vp = SMBTOV(smi->smi_root); 1527 VN_HOLD(vp); 1528 *vpp = vp; 1529 return (0); 1530 } 1531 vp = smbfs_make_node(dvp->v_vfsp, 1532 dnp->n_rpath, rplen, 1533 NULL, 0, 0, NULL); 1534 ASSERT(vp); 1535 vp->v_type = VDIR; 1536 #ifdef USE_DNLC 1537 dnlc_update(dvp, nm, vp); 1538 #endif 1539 1540 /* Success! */ 1541 *vpp = vp; 1542 return (0); 1543 } 1544 1545 /* 1546 * Normal lookup of a child node. 1547 * Note we handled "." and ".." above. 1548 * 1549 * First, go over-the-wire to get the 1550 * node type (and attributes). 1551 */ 1552 smb_credinit(&scred, curproc, cr); 1553 /* Note: this can allocate a new "name" */ 1554 error = smbfs_smb_lookup(dnp, &name, &nmlen, &fa, &scred); 1555 smb_credrele(&scred); 1556 #ifdef USE_DNLC 1557 if (error == ENOENT) 1558 dnlc_enter(dvp, nm, DNLC_NO_VNODE); 1559 #endif 1560 if (error) 1561 goto out; 1562 1563 /* 1564 * Find or create the node. 1565 */ 1566 error = smbfs_nget(dvp, name, nmlen, &fa, &vp); 1567 if (error) 1568 goto out; 1569 1570 #ifdef USE_DNLC 1571 dnlc_update(dvp, nm, vp); 1572 #endif 1573 1574 /* Success! */ 1575 *vpp = vp; 1576 1577 out: 1578 /* smbfs_smb_lookup may have allocated name. */ 1579 if (name != nm) 1580 smbfs_name_free(name, nmlen); 1581 1582 return (error); 1583 } 1584 1585 #ifdef USE_DNLC 1586 #ifdef DEBUG 1587 static int smbfs_lookup_dnlc_hits = 0; 1588 static int smbfs_lookup_dnlc_misses = 0; 1589 static int smbfs_lookup_dnlc_neg_hits = 0; 1590 static int smbfs_lookup_dnlc_disappears = 0; 1591 static int smbfs_lookup_dnlc_lookups = 0; 1592 #endif 1593 1594 /* ARGSUSED */ 1595 static int 1596 smbfslookup_dnlc(vnode_t *dvp, char *nm, vnode_t **vpp, cred_t *cr) 1597 { 1598 int error; 1599 vnode_t *vp; 1600 struct vattr va; 1601 smbnode_t *dnp; 1602 1603 dnp = VTOSMB(dvp); 1604 1605 ASSERT(*nm != '\0'); 1606 ASSERT(curproc->p_zone == VTOSMI(dvp)->smi_zone); 1607 1608 /* 1609 * Lookup this name in the DNLC. If successful, then validate 1610 * the caches and then recheck the DNLC. The DNLC is rechecked 1611 * just in case this entry got invalidated during the call 1612 * to smbfsgetattr(). 1613 * An assumption is being made that it is safe to say that a 1614 * file exists which may not on the server. Any operations to 1615 * the server will fail with ESTALE. 1616 */ 1617 1618 #ifdef DEBUG 1619 smbfs_lookup_dnlc_lookups++; 1620 #endif 1621 vp = dnlc_lookup(dvp, nm); 1622 if (vp != NULL) { 1623 if (vp == DNLC_NO_VNODE && !vn_is_readonly(dvp)) 1624 smbfs_attr_cacheremove(dnp); 1625 VN_RELE(vp); 1626 error = smbfsgetattr(dvp, &va, cr); 1627 if (error) 1628 return (error); 1629 vp = dnlc_lookup(dvp, nm); 1630 if (vp != NULL) { 1631 /* 1632 * NFS checks VEXEC access here, 1633 * but we've already done that 1634 * in the caller. 1635 */ 1636 if (vp == DNLC_NO_VNODE) { 1637 VN_RELE(vp); 1638 #ifdef DEBUG 1639 smbfs_lookup_dnlc_neg_hits++; 1640 #endif 1641 return (ENOENT); 1642 } 1643 *vpp = vp; 1644 #ifdef DEBUG 1645 smbfs_lookup_dnlc_hits++; 1646 #endif 1647 return (0); 1648 } 1649 #ifdef DEBUG 1650 smbfs_lookup_dnlc_disappears++; 1651 #endif 1652 } 1653 #ifdef DEBUG 1654 else 1655 smbfs_lookup_dnlc_misses++; 1656 #endif 1657 *vpp = NULL; 1658 1659 return (0); 1660 } 1661 #endif /* USE_DNLC */ 1662 1663 /* 1664 * XXX 1665 * vsecattr_t is new to build 77, and we need to eventually support 1666 * it in order to create an ACL when an object is created. 1667 * 1668 * This op should support the new FIGNORECASE flag for case-insensitive 1669 * lookups, per PSARC 2007/244. 1670 */ 1671 /* ARGSUSED */ 1672 static int 1673 smbfs_create(vnode_t *dvp, char *nm, struct vattr *va, enum vcexcl exclusive, 1674 int mode, vnode_t **vpp, cred_t *cr, int lfaware, caller_context_t *ct, 1675 vsecattr_t *vsecp) 1676 { 1677 int error; 1678 int cerror; 1679 vfs_t *vfsp; 1680 vnode_t *vp; 1681 #ifdef NOT_YET 1682 smbnode_t *np; 1683 #endif 1684 smbnode_t *dnp; 1685 smbmntinfo_t *smi; 1686 struct vattr vattr; 1687 struct smbfattr fattr; 1688 struct smb_cred scred; 1689 const char *name = (const char *)nm; 1690 int nmlen = strlen(nm); 1691 uint32_t disp; 1692 uint16_t fid; 1693 int xattr; 1694 1695 vfsp = dvp->v_vfsp; 1696 smi = VFTOSMI(vfsp); 1697 dnp = VTOSMB(dvp); 1698 vp = NULL; 1699 1700 if (curproc->p_zone != smi->smi_zone) 1701 return (EPERM); 1702 1703 if (smi->smi_flags & SMI_DEAD || vfsp->vfs_flag & VFS_UNMOUNTED) 1704 return (EIO); 1705 1706 /* 1707 * Note: this may break mknod(2) calls to create a directory, 1708 * but that's obscure use. Some other filesystems do this. 1709 * XXX: Later, redirect VDIR type here to _mkdir. 1710 */ 1711 if (va->va_type != VREG) 1712 return (EINVAL); 1713 1714 /* 1715 * If the pathname is "", just use dvp, no checks. 1716 * Do this outside of the rwlock (like zfs). 1717 */ 1718 if (nmlen == 0) { 1719 VN_HOLD(dvp); 1720 *vpp = dvp; 1721 return (0); 1722 } 1723 1724 /* Don't allow "." or ".." through here. */ 1725 if ((nmlen == 1 && name[0] == '.') || 1726 (nmlen == 2 && name[0] == '.' && name[1] == '.')) 1727 return (EISDIR); 1728 1729 /* 1730 * We make a copy of the attributes because the caller does not 1731 * expect us to change what va points to. 1732 */ 1733 vattr = *va; 1734 1735 if (smbfs_rw_enter_sig(&dnp->r_rwlock, RW_WRITER, SMBINTR(dvp))) 1736 return (EINTR); 1737 smb_credinit(&scred, curproc, cr); 1738 1739 /* 1740 * XXX: Do we need r_lkserlock too? 1741 * No use of any shared fid or fctx... 1742 */ 1743 1744 /* 1745 * NFS needs to go over the wire, just to be sure whether the 1746 * file exists or not. Using the DNLC can be dangerous in 1747 * this case when making a decision regarding existence. 1748 * 1749 * The SMB protocol does NOT really need to go OTW here 1750 * thanks to the expressive NTCREATE disposition values. 1751 * Unfortunately, to do Unix access checks correctly, 1752 * we need to know if the object already exists. 1753 * When the object does not exist, we need VWRITE on 1754 * the directory. Note: smbfslookup() checks VEXEC. 1755 */ 1756 error = smbfslookup(dvp, nm, &vp, cr, 0, ct); 1757 if (error == 0) { 1758 /* 1759 * The file already exists. Error? 1760 * NB: have a hold from smbfslookup 1761 */ 1762 if (exclusive == EXCL) { 1763 error = EEXIST; 1764 VN_RELE(vp); 1765 goto out; 1766 } 1767 /* 1768 * Verify requested access. 1769 */ 1770 error = smbfs_access(vp, mode, 0, cr, ct); 1771 if (error) { 1772 VN_RELE(vp); 1773 goto out; 1774 } 1775 1776 /* 1777 * Truncate (if requested). 1778 */ 1779 if ((vattr.va_mask & AT_SIZE) && vattr.va_size == 0) { 1780 vattr.va_mask = AT_SIZE; 1781 error = smbfssetattr(vp, &vattr, 0, cr); 1782 if (error) { 1783 VN_RELE(vp); 1784 goto out; 1785 } 1786 } 1787 /* Success! */ 1788 #ifdef NOT_YET 1789 vnevent_create(vp, ct); 1790 #endif 1791 *vpp = vp; 1792 goto out; 1793 } 1794 1795 /* 1796 * The file did not exist. Need VWRITE in the directory. 1797 */ 1798 error = smbfs_access(dvp, VWRITE, 0, cr, ct); 1799 if (error) 1800 goto out; 1801 1802 /* 1803 * Now things get tricky. We also need to check the 1804 * requested open mode against the file we may create. 1805 * See comments at smbfs_access_rwx 1806 */ 1807 error = smbfs_access_rwx(vfsp, VREG, mode, cr); 1808 if (error) 1809 goto out; 1810 1811 /* remove possible negative entry from the dnlc */ 1812 dnlc_remove(dvp, nm); 1813 1814 /* 1815 * Now the code derived from Darwin, 1816 * but with greater use of NT_CREATE 1817 * disposition options. Much changed. 1818 * 1819 * Create (or open) a new child node. 1820 * Note we handled "." and ".." above. 1821 */ 1822 1823 if (exclusive == EXCL) 1824 disp = NTCREATEX_DISP_CREATE; 1825 else { 1826 /* Truncate regular files if requested. */ 1827 if ((va->va_type == VREG) && 1828 (va->va_mask & AT_SIZE) && 1829 (va->va_size == 0)) 1830 disp = NTCREATEX_DISP_OVERWRITE_IF; 1831 else 1832 disp = NTCREATEX_DISP_OPEN_IF; 1833 } 1834 xattr = (dnp->n_flag & N_XATTR) ? 1 : 0; 1835 error = smbfs_smb_create(dnp, name, nmlen, &scred, &fid, disp, xattr); 1836 if (error) 1837 goto out; 1838 1839 /* 1840 * XXX: Missing some code here to deal with 1841 * the case where we opened an existing file, 1842 * it's size is larger than 32-bits, and we're 1843 * setting the size from a process that's not 1844 * aware of large file offsets. i.e. 1845 * from the NFS3 code: 1846 */ 1847 #if NOT_YET /* XXX */ 1848 if ((vattr.va_mask & AT_SIZE) && 1849 vp->v_type == VREG) { 1850 np = VTOSMB(vp); 1851 /* 1852 * Check here for large file handled 1853 * by LF-unaware process (as 1854 * ufs_create() does) 1855 */ 1856 if (!(lfaware & FOFFMAX)) { 1857 mutex_enter(&np->r_statelock); 1858 if (np->r_size > MAXOFF32_T) 1859 error = EOVERFLOW; 1860 mutex_exit(&np->r_statelock); 1861 } 1862 if (!error) { 1863 vattr.va_mask = AT_SIZE; 1864 error = smbfssetattr(vp, 1865 &vattr, 0, cr); 1866 } 1867 } 1868 #endif /* XXX */ 1869 /* 1870 * Should use the fid to get/set the size 1871 * while we have it opened here. See above. 1872 */ 1873 1874 cerror = smbfs_smb_close(smi->smi_share, fid, NULL, &scred); 1875 if (cerror) 1876 SMBERROR("error %d closing %s\\%s\n", 1877 cerror, dnp->n_rpath, name); 1878 1879 /* 1880 * In the open case, the name may differ a little 1881 * from what we passed to create (case, etc.) 1882 * so call lookup to get the (opened) name. 1883 * 1884 * XXX: Could avoid this extra lookup if the 1885 * "createact" result from NT_CREATE says we 1886 * created the object. 1887 */ 1888 error = smbfs_smb_lookup(dnp, &name, &nmlen, &fattr, &scred); 1889 if (error) 1890 goto out; 1891 1892 /* update attr and directory cache */ 1893 smbfs_attr_touchdir(dnp); 1894 1895 error = smbfs_nget(dvp, name, nmlen, &fattr, &vp); 1896 if (error) 1897 goto out; 1898 1899 #ifdef USE_DNLC 1900 dnlc_update(dvp, nm, vp); 1901 #endif 1902 1903 /* XXX invalidate pages if we truncated? */ 1904 1905 /* Success! */ 1906 *vpp = vp; 1907 error = 0; 1908 1909 out: 1910 smb_credrele(&scred); 1911 if (name != nm) 1912 smbfs_name_free(name, nmlen); 1913 smbfs_rw_exit(&dnp->r_rwlock); 1914 return (error); 1915 } 1916 1917 /* 1918 * XXX 1919 * This op should support the new FIGNORECASE flag for case-insensitive 1920 * lookups, per PSARC 2007/244. 1921 */ 1922 /* ARGSUSED */ 1923 static int 1924 smbfs_remove(vnode_t *dvp, char *nm, cred_t *cr, caller_context_t *ct, 1925 int flags) 1926 { 1927 int error; 1928 vnode_t *vp; 1929 smbnode_t *np; 1930 smbnode_t *dnp; 1931 struct smb_cred scred; 1932 /* enum smbfsstat status; */ 1933 smbmntinfo_t *smi; 1934 1935 smi = VTOSMI(dvp); 1936 1937 if (curproc->p_zone != smi->smi_zone) 1938 return (EPERM); 1939 1940 if (smi->smi_flags & SMI_DEAD || dvp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 1941 return (EIO); 1942 1943 dnp = VTOSMB(dvp); 1944 if (smbfs_rw_enter_sig(&dnp->r_rwlock, RW_WRITER, SMBINTR(dvp))) 1945 return (EINTR); 1946 1947 /* 1948 * Verify access to the dirctory. 1949 */ 1950 error = smbfs_access(dvp, VWRITE|VEXEC, 0, cr, ct); 1951 if (error) 1952 goto out; 1953 1954 /* 1955 * NOTE: the darwin code gets the "vp" passed in so it looks 1956 * like the "vp" has probably been "lookup"ed by the VFS layer. 1957 * It looks like we will need to lookup the vp to check the 1958 * caches and check if the object being deleted is a directory. 1959 */ 1960 error = smbfslookup(dvp, nm, &vp, cr, 0, ct); 1961 if (error) 1962 goto out; 1963 1964 /* Never allow link/unlink directories on CIFS. */ 1965 if (vp->v_type == VDIR) { 1966 VN_RELE(vp); 1967 error = EPERM; 1968 goto out; 1969 } 1970 1971 /* 1972 * First just remove the entry from the name cache, as it 1973 * is most likely the only entry for this vp. 1974 */ 1975 dnlc_remove(dvp, nm); 1976 1977 /* 1978 * If the file has a v_count > 1 then there may be more than one 1979 * entry in the name cache due multiple links or an open file, 1980 * but we don't have the real reference count so flush all 1981 * possible entries. 1982 */ 1983 if (vp->v_count > 1) 1984 dnlc_purge_vp(vp); 1985 1986 /* 1987 * Now we have the real reference count on the vnode 1988 */ 1989 np = VTOSMB(vp); 1990 mutex_enter(&np->r_statelock); 1991 if (vp->v_count > 1) { 1992 /* 1993 * NFS does a rename on remove here. 1994 * Probably not applicable for SMB. 1995 * Like Darwin, just return EBUSY. 1996 * 1997 * XXX: Todo - Ask the server to set the 1998 * set the delete-on-close flag. 1999 */ 2000 mutex_exit(&np->r_statelock); 2001 error = EBUSY; 2002 } else { 2003 mutex_exit(&np->r_statelock); 2004 2005 smb_credinit(&scred, curproc, cr); 2006 error = smbfs_smb_delete(np, &scred, NULL, 0, 0); 2007 smb_credrele(&scred); 2008 2009 } 2010 2011 VN_RELE(vp); 2012 2013 out: 2014 smbfs_rw_exit(&dnp->r_rwlock); 2015 2016 return (error); 2017 } 2018 2019 2020 /* 2021 * XXX 2022 * This op should support the new FIGNORECASE flag for case-insensitive 2023 * lookups, per PSARC 2007/244. 2024 */ 2025 /* ARGSUSED */ 2026 static int 2027 smbfs_rename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr, 2028 caller_context_t *ct, int flags) 2029 { 2030 /* vnode_t *realvp; */ 2031 2032 if (curproc->p_zone != VTOSMI(odvp)->smi_zone || 2033 curproc->p_zone != VTOSMI(ndvp)->smi_zone) 2034 return (EPERM); 2035 2036 if (VTOSMI(odvp)->smi_flags & SMI_DEAD || 2037 VTOSMI(ndvp)->smi_flags & SMI_DEAD || 2038 odvp->v_vfsp->vfs_flag & VFS_UNMOUNTED || 2039 ndvp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 2040 return (EIO); 2041 2042 return (smbfsrename(odvp, onm, ndvp, nnm, cr, ct)); 2043 } 2044 2045 /* 2046 * smbfsrename does the real work of renaming in SMBFS 2047 */ 2048 /* ARGSUSED */ 2049 static int 2050 smbfsrename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr, 2051 caller_context_t *ct) 2052 { 2053 int error; 2054 int nvp_locked = 0; 2055 vnode_t *nvp = NULL; 2056 vnode_t *ovp = NULL; 2057 smbnode_t *onp; 2058 smbnode_t *nnp; 2059 smbnode_t *odnp; 2060 smbnode_t *ndnp; 2061 struct smb_cred scred; 2062 /* enum smbfsstat status; */ 2063 2064 ASSERT(curproc->p_zone == VTOSMI(odvp)->smi_zone); 2065 2066 if (strcmp(onm, ".") == 0 || strcmp(onm, "..") == 0 || 2067 strcmp(nnm, ".") == 0 || strcmp(nnm, "..") == 0) 2068 return (EINVAL); 2069 2070 /* 2071 * Check that everything is on the same filesystem. 2072 * vn_rename checks the fsid's, but in case we don't 2073 * fill those in correctly, check here too. 2074 */ 2075 if (odvp->v_vfsp != ndvp->v_vfsp) 2076 return (EXDEV); 2077 2078 odnp = VTOSMB(odvp); 2079 ndnp = VTOSMB(ndvp); 2080 2081 /* 2082 * Avoid deadlock here on old vs new directory nodes 2083 * by always taking the locks in order of address. 2084 * The order is arbitrary, but must be consistent. 2085 */ 2086 if (odnp < ndnp) { 2087 if (smbfs_rw_enter_sig(&odnp->r_rwlock, RW_WRITER, 2088 SMBINTR(odvp))) 2089 return (EINTR); 2090 if (smbfs_rw_enter_sig(&ndnp->r_rwlock, RW_WRITER, 2091 SMBINTR(ndvp))) { 2092 smbfs_rw_exit(&odnp->r_rwlock); 2093 return (EINTR); 2094 } 2095 } else { 2096 if (smbfs_rw_enter_sig(&ndnp->r_rwlock, RW_WRITER, 2097 SMBINTR(ndvp))) 2098 return (EINTR); 2099 if (smbfs_rw_enter_sig(&odnp->r_rwlock, RW_WRITER, 2100 SMBINTR(odvp))) { 2101 smbfs_rw_exit(&ndnp->r_rwlock); 2102 return (EINTR); 2103 } 2104 } 2105 /* 2106 * No returns after this point (goto out) 2107 */ 2108 2109 /* 2110 * Need write access on source and target. 2111 * Server takes care of most checks. 2112 */ 2113 error = smbfs_access(odvp, VWRITE|VEXEC, 0, cr, ct); 2114 if (error) 2115 goto out; 2116 if (odvp != ndvp) { 2117 error = smbfs_access(ndvp, VWRITE, 0, cr, ct); 2118 if (error) 2119 goto out; 2120 } 2121 2122 /* 2123 * Lookup the source name. Must already exist. 2124 */ 2125 error = smbfslookup(odvp, onm, &ovp, cr, 0, ct); 2126 if (error) 2127 goto out; 2128 2129 /* 2130 * Lookup the target file. If it exists, it needs to be 2131 * checked to see whether it is a mount point and whether 2132 * it is active (open). 2133 */ 2134 error = smbfslookup(ndvp, nnm, &nvp, cr, 0, ct); 2135 if (!error) { 2136 /* 2137 * Target (nvp) already exists. Check that it 2138 * has the same type as the source. The server 2139 * will check this also, (and more reliably) but 2140 * this lets us return the correct error codes. 2141 */ 2142 if (ovp->v_type == VDIR) { 2143 if (nvp->v_type != VDIR) { 2144 error = ENOTDIR; 2145 goto out; 2146 } 2147 } else { 2148 if (nvp->v_type == VDIR) { 2149 error = EISDIR; 2150 goto out; 2151 } 2152 } 2153 2154 /* 2155 * POSIX dictates that when the source and target 2156 * entries refer to the same file object, rename 2157 * must do nothing and exit without error. 2158 */ 2159 if (ovp == nvp) { 2160 error = 0; 2161 goto out; 2162 } 2163 2164 /* 2165 * Also must ensure the target is not a mount point, 2166 * and keep mount/umount away until we're done. 2167 */ 2168 if (vn_vfsrlock(nvp)) { 2169 error = EBUSY; 2170 goto out; 2171 } 2172 nvp_locked = 1; 2173 if (vn_mountedvfs(nvp) != NULL) { 2174 error = EBUSY; 2175 goto out; 2176 } 2177 2178 /* 2179 * Purge the name cache of all references to this vnode 2180 * so that we can check the reference count to infer 2181 * whether it is active or not. 2182 */ 2183 /* 2184 * First just remove the entry from the name cache, as it 2185 * is most likely the only entry for this vp. 2186 */ 2187 dnlc_remove(ndvp, nnm); 2188 /* 2189 * If the file has a v_count > 1 then there may be more 2190 * than one entry in the name cache due multiple links 2191 * or an open file, but we don't have the real reference 2192 * count so flush all possible entries. 2193 */ 2194 if (nvp->v_count > 1) 2195 dnlc_purge_vp(nvp); 2196 /* 2197 * when renaming directories to be a subdirectory of a 2198 * different parent, the dnlc entry for ".." will no 2199 * longer be valid, so it must be removed 2200 */ 2201 if (ndvp != odvp) { 2202 if (ovp->v_type == VDIR) { 2203 dnlc_remove(ovp, ".."); 2204 } 2205 } 2206 2207 /* 2208 * CIFS gives a SHARING_VIOLATION error when 2209 * trying to rename onto an exising object, 2210 * so try to remove the target first. 2211 * (Only for files, not directories.) 2212 */ 2213 if (nvp->v_type == VDIR) { 2214 error = EEXIST; 2215 goto out; 2216 } 2217 2218 /* 2219 * Nodes that are "not active" here have v_count=2 2220 * because vn_renameat (our caller) did a lookup on 2221 * both the source and target before this call. 2222 * Otherwise this similar to smbfs_remove. 2223 */ 2224 nnp = VTOSMB(nvp); 2225 mutex_enter(&nnp->r_statelock); 2226 if (nvp->v_count > 2) { 2227 /* 2228 * The target file exists, is not the same as 2229 * the source file, and is active. Other FS 2230 * implementations unlink the target here. 2231 * For SMB, we don't assume we can remove an 2232 * open file. Return an error instead. 2233 */ 2234 mutex_exit(&nnp->r_statelock); 2235 error = EBUSY; 2236 goto out; 2237 } 2238 mutex_exit(&nnp->r_statelock); 2239 2240 /* 2241 * Target file is not active. Try to remove it. 2242 */ 2243 smb_credinit(&scred, curproc, cr); 2244 error = smbfs_smb_delete(nnp, &scred, NULL, 0, 0); 2245 smb_credrele(&scred); 2246 if (error) 2247 goto out; 2248 /* 2249 * OK, removed the target file. Continue as if 2250 * lookup target had failed (nvp == NULL). 2251 */ 2252 vn_vfsunlock(nvp); 2253 nvp_locked = 0; 2254 VN_RELE(nvp); 2255 nvp = NULL; 2256 } /* nvp */ 2257 2258 dnlc_remove(odvp, onm); 2259 dnlc_remove(ndvp, nnm); 2260 2261 onp = VTOSMB(ovp); 2262 smb_credinit(&scred, curproc, cr); 2263 error = smbfs_smb_rename(onp, ndnp, nnm, strlen(nnm), &scred); 2264 smb_credrele(&scred); 2265 2266 2267 out: 2268 if (nvp) { 2269 if (nvp_locked) 2270 vn_vfsunlock(nvp); 2271 VN_RELE(nvp); 2272 } 2273 if (ovp) 2274 VN_RELE(ovp); 2275 2276 smbfs_rw_exit(&odnp->r_rwlock); 2277 smbfs_rw_exit(&ndnp->r_rwlock); 2278 2279 return (error); 2280 } 2281 2282 /* 2283 * XXX 2284 * vsecattr_t is new to build 77, and we need to eventually support 2285 * it in order to create an ACL when an object is created. 2286 * 2287 * This op should support the new FIGNORECASE flag for case-insensitive 2288 * lookups, per PSARC 2007/244. 2289 */ 2290 /* ARGSUSED */ 2291 static int 2292 smbfs_mkdir(vnode_t *dvp, char *nm, struct vattr *va, vnode_t **vpp, 2293 cred_t *cr, caller_context_t *ct, int flags, vsecattr_t *vsecp) 2294 { 2295 vnode_t *vp; 2296 struct smbnode *dnp = VTOSMB(dvp); 2297 struct smbmntinfo *smi = VTOSMI(dvp); 2298 struct smb_cred scred; 2299 struct smbfattr fattr; 2300 const char *name = (const char *) nm; 2301 int nmlen = strlen(name); 2302 int error, hiderr; 2303 2304 if (curproc->p_zone != smi->smi_zone) 2305 return (EPERM); 2306 2307 if (smi->smi_flags & SMI_DEAD || dvp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 2308 return (EIO); 2309 2310 if ((nmlen == 1 && name[0] == '.') || 2311 (nmlen == 2 && name[0] == '.' && name[1] == '.')) 2312 return (EEXIST); 2313 2314 /* Only plain files are allowed in V_XATTRDIR. */ 2315 if (dvp->v_flag & V_XATTRDIR) 2316 return (EINVAL); 2317 2318 if (smbfs_rw_enter_sig(&dnp->r_rwlock, RW_WRITER, SMBINTR(dvp))) 2319 return (EINTR); 2320 smb_credinit(&scred, curproc, cr); 2321 2322 /* 2323 * XXX: Do we need r_lkserlock too? 2324 * No use of any shared fid or fctx... 2325 */ 2326 2327 /* 2328 * Require write access in the containing directory. 2329 */ 2330 error = smbfs_access(dvp, VWRITE, 0, cr, ct); 2331 if (error) 2332 goto out; 2333 2334 /* remove possible negative entry from the dnlc */ 2335 dnlc_remove(dvp, nm); 2336 2337 error = smbfs_smb_mkdir(dnp, name, nmlen, &scred); 2338 if (error) 2339 goto out; 2340 2341 error = smbfs_smb_lookup(dnp, &name, &nmlen, &fattr, &scred); 2342 if (error) 2343 goto out; 2344 2345 smbfs_attr_touchdir(dnp); 2346 2347 error = smbfs_nget(dvp, name, nmlen, &fattr, &vp); 2348 if (error) 2349 goto out; 2350 2351 #ifdef USE_DNLC 2352 dnlc_update(dvp, nm, vp); 2353 #endif 2354 2355 if (name[0] == '.') 2356 if ((hiderr = smbfs_smb_hideit(VTOSMB(vp), NULL, 0, &scred))) 2357 SMBVDEBUG("hide failure %d\n", hiderr); 2358 2359 /* Success! */ 2360 *vpp = vp; 2361 error = 0; 2362 out: 2363 smb_credrele(&scred); 2364 smbfs_rw_exit(&dnp->r_rwlock); 2365 2366 if (name != nm) 2367 smbfs_name_free(name, nmlen); 2368 2369 return (error); 2370 } 2371 2372 /* 2373 * XXX 2374 * This op should support the new FIGNORECASE flag for case-insensitive 2375 * lookups, per PSARC 2007/244. 2376 */ 2377 /* ARGSUSED */ 2378 static int 2379 smbfs_rmdir(vnode_t *dvp, char *nm, vnode_t *cdir, cred_t *cr, 2380 caller_context_t *ct, int flags) 2381 { 2382 vnode_t *vp = NULL; 2383 int vp_locked = 0; 2384 struct smbmntinfo *smi = VTOSMI(dvp); 2385 struct smbnode *dnp = VTOSMB(dvp); 2386 struct smbnode *np; 2387 struct smb_cred scred; 2388 int error; 2389 2390 if (curproc->p_zone != smi->smi_zone) 2391 return (EPERM); 2392 2393 if (smi->smi_flags & SMI_DEAD || dvp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 2394 return (EIO); 2395 2396 if (smbfs_rw_enter_sig(&dnp->r_rwlock, RW_WRITER, SMBINTR(dvp))) 2397 return (EINTR); 2398 smb_credinit(&scred, curproc, cr); 2399 2400 /* 2401 * Require w/x access in the containing directory. 2402 * Server handles all other access checks. 2403 */ 2404 error = smbfs_access(dvp, VEXEC|VWRITE, 0, cr, ct); 2405 if (error) 2406 goto out; 2407 2408 /* 2409 * First lookup the entry to be removed. 2410 */ 2411 error = smbfslookup(dvp, nm, &vp, cr, 0, ct); 2412 if (error) 2413 goto out; 2414 np = VTOSMB(vp); 2415 2416 /* 2417 * Disallow rmdir of "." or current dir, or the FS root. 2418 * Also make sure it's a directory, not a mount point, 2419 * and lock to keep mount/umount away until we're done. 2420 */ 2421 if ((vp == dvp) || (vp == cdir) || (vp->v_flag & VROOT)) { 2422 error = EINVAL; 2423 goto out; 2424 } 2425 if (vp->v_type != VDIR) { 2426 error = ENOTDIR; 2427 goto out; 2428 } 2429 if (vn_vfsrlock(vp)) { 2430 error = EBUSY; 2431 goto out; 2432 } 2433 vp_locked = 1; 2434 if (vn_mountedvfs(vp) != NULL) { 2435 error = EBUSY; 2436 goto out; 2437 } 2438 2439 /* 2440 * First just remove the entry from the name cache, as it 2441 * is most likely an entry for this vp. 2442 */ 2443 dnlc_remove(dvp, nm); 2444 2445 /* 2446 * If there vnode reference count is greater than one, then 2447 * there may be additional references in the DNLC which will 2448 * need to be purged. First, trying removing the entry for 2449 * the parent directory and see if that removes the additional 2450 * reference(s). If that doesn't do it, then use dnlc_purge_vp 2451 * to completely remove any references to the directory which 2452 * might still exist in the DNLC. 2453 */ 2454 if (vp->v_count > 1) { 2455 dnlc_remove(vp, ".."); 2456 if (vp->v_count > 1) 2457 dnlc_purge_vp(vp); 2458 } 2459 2460 error = smbfs_smb_rmdir(np, &scred); 2461 if (error) 2462 goto out; 2463 2464 mutex_enter(&np->r_statelock); 2465 dnp->n_flag |= NMODIFIED; 2466 mutex_exit(&np->r_statelock); 2467 smbfs_attr_touchdir(dnp); 2468 smb_rmhash(np); 2469 2470 out: 2471 if (vp) { 2472 if (vp_locked) 2473 vn_vfsunlock(vp); 2474 VN_RELE(vp); 2475 } 2476 smb_credrele(&scred); 2477 smbfs_rw_exit(&dnp->r_rwlock); 2478 2479 return (error); 2480 } 2481 2482 2483 /* ARGSUSED */ 2484 static int 2485 smbfs_readdir(vnode_t *vp, struct uio *uiop, cred_t *cr, int *eofp, 2486 caller_context_t *ct, int flags) 2487 { 2488 struct smbnode *np = VTOSMB(vp); 2489 int error = 0; 2490 smbmntinfo_t *smi; 2491 2492 smi = VTOSMI(vp); 2493 2494 if (curproc->p_zone != smi->smi_zone) 2495 return (EIO); 2496 2497 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 2498 return (EIO); 2499 2500 /* 2501 * Require read access in the directory. 2502 */ 2503 error = smbfs_access(vp, VREAD, 0, cr, ct); 2504 if (error) 2505 return (error); 2506 2507 ASSERT(smbfs_rw_lock_held(&np->r_rwlock, RW_READER)); 2508 2509 /* 2510 * XXX: Todo readdir cache here 2511 * Note: NFS code is just below this. 2512 * 2513 * I am serializing the entire readdir opreation 2514 * now since we have not yet implemented readdir 2515 * cache. This fix needs to be revisited once 2516 * we implement readdir cache. 2517 */ 2518 if (smbfs_rw_enter_sig(&np->r_lkserlock, RW_WRITER, SMBINTR(vp))) 2519 return (EINTR); 2520 2521 error = smbfs_readvdir(vp, uiop, cr, eofp, ct); 2522 2523 smbfs_rw_exit(&np->r_lkserlock); 2524 2525 return (error); 2526 } 2527 2528 /* ARGSUSED */ 2529 static int 2530 smbfs_readvdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp, 2531 caller_context_t *ct) 2532 { 2533 size_t dbufsiz; 2534 struct dirent64 *dp; 2535 struct smb_cred scred; 2536 vnode_t *newvp; 2537 struct smbnode *np = VTOSMB(vp); 2538 int nmlen, reclen, error = 0; 2539 long offset, limit; 2540 struct smbfs_fctx *ctx; 2541 2542 ASSERT(curproc->p_zone == VTOSMI(vp)->smi_zone); 2543 2544 /* Make sure we serialize for n_dirseq use. */ 2545 ASSERT(smbfs_rw_lock_held(&np->r_lkserlock, RW_WRITER)); 2546 2547 /* Min size is DIRENT64_RECLEN(256) rounded up. */ 2548 if (uio->uio_resid < 512 || uio->uio_offset < 0) 2549 return (EINVAL); 2550 2551 /* 2552 * This dnlc_purge_vp ensures that name cache for this dir will be 2553 * current - it'll only have the items for which the smbfs_nget 2554 * MAKEENTRY happened. 2555 */ 2556 #ifdef NOT_YET 2557 if (smbfs_fastlookup) 2558 dnlc_purge_vp(vp); 2559 #endif 2560 SMBVDEBUG("dirname='%s'\n", np->n_rpath); 2561 smb_credinit(&scred, curproc, cr); 2562 dbufsiz = DIRENT64_RECLEN(MAXNAMELEN); 2563 dp = kmem_alloc(dbufsiz, KM_SLEEP); 2564 2565 offset = uio->uio_offset; /* NB: "cookie" */ 2566 limit = uio->uio_resid / DIRENT64_RECLEN(1); 2567 SMBVDEBUG("offset=0x%ld, limit=0x%ld\n", offset, limit); 2568 2569 if (offset == 0) { 2570 /* Don't know EOF until findclose */ 2571 np->n_direof = -1; 2572 } else if (offset == np->n_direof) { 2573 /* Arrived at end of directory. */ 2574 goto out; 2575 } 2576 2577 /* 2578 * Generate the "." and ".." entries here so we can 2579 * (1) make sure they appear (but only once), and 2580 * (2) deal with getting their I numbers which the 2581 * findnext below does only for normal names. 2582 */ 2583 while (limit && offset < 2) { 2584 limit--; 2585 reclen = DIRENT64_RECLEN(offset + 1); 2586 bzero(dp, reclen); 2587 /*LINTED*/ 2588 dp->d_reclen = reclen; 2589 /* Tricky: offset 0 is ".", offset 1 is ".." */ 2590 dp->d_name[0] = '.'; 2591 dp->d_name[1] = '.'; 2592 dp->d_name[offset + 1] = '\0'; 2593 /* 2594 * Want the real I-numbers for the "." and ".." 2595 * entries. For these two names, we know that 2596 * smbfslookup can do this all locally. 2597 */ 2598 error = smbfslookup(vp, dp->d_name, &newvp, cr, 1, ct); 2599 if (error) { 2600 dp->d_ino = np->n_ino + offset; /* fiction */ 2601 } else { 2602 dp->d_ino = VTOSMB(newvp)->n_ino; 2603 VN_RELE(newvp); 2604 } 2605 dp->d_off = offset + 1; /* see d_off below */ 2606 error = uiomove(dp, dp->d_reclen, UIO_READ, uio); 2607 if (error) 2608 goto out; 2609 uio->uio_offset = ++offset; 2610 } 2611 if (limit == 0) 2612 goto out; 2613 if (offset != np->n_dirofs || np->n_dirseq == NULL) { 2614 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs); 2615 if (np->n_dirseq) { 2616 (void) smbfs_smb_findclose(np->n_dirseq, &scred); 2617 np->n_dirseq = NULL; 2618 } 2619 np->n_dirofs = 2; 2620 error = smbfs_smb_findopen(np, "*", 1, 2621 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR, 2622 &scred, &ctx); 2623 if (error) { 2624 SMBVDEBUG("can not open search, error = %d", error); 2625 goto out; 2626 } 2627 np->n_dirseq = ctx; 2628 } else 2629 ctx = np->n_dirseq; 2630 while (np->n_dirofs < offset) { 2631 if (smbfs_smb_findnext(ctx, offset - np->n_dirofs++, 2632 &scred) != 0) { 2633 (void) smbfs_smb_findclose(np->n_dirseq, &scred); 2634 np->n_dirseq = NULL; 2635 np->n_direof = np->n_dirofs; 2636 np->n_dirofs = 0; 2637 *eofp = 1; 2638 error = 0; 2639 goto out; 2640 } 2641 } 2642 error = 0; 2643 for (; limit; limit--) { 2644 error = smbfs_smb_findnext(ctx, limit, &scred); 2645 if (error) { 2646 if (error == EBADRPC) 2647 error = ENOENT; 2648 (void) smbfs_smb_findclose(np->n_dirseq, &scred); 2649 np->n_dirseq = NULL; 2650 np->n_direof = np->n_dirofs; 2651 np->n_dirofs = 0; 2652 *eofp = 1; 2653 error = 0; 2654 break; 2655 } 2656 np->n_dirofs++; 2657 /* Sanity check the name length. */ 2658 nmlen = ctx->f_nmlen; 2659 if (nmlen > (MAXNAMELEN - 1)) { 2660 nmlen = MAXNAMELEN - 1; 2661 SMBVDEBUG("Truncating name: %s\n", ctx->f_name); 2662 } 2663 reclen = DIRENT64_RECLEN(nmlen); 2664 if (uio->uio_resid < reclen) 2665 break; 2666 bzero(dp, reclen); 2667 /*LINTED*/ 2668 dp->d_reclen = reclen; 2669 dp->d_ino = ctx->f_attr.fa_ino; 2670 /* 2671 * Note: d_off is the offset that a user-level program 2672 * should seek to for reading the _next_ directory entry. 2673 * See libc: readdir, telldir, seekdir 2674 */ 2675 dp->d_off = offset + 1; 2676 bcopy(ctx->f_name, dp->d_name, nmlen); 2677 dp->d_name[nmlen] = '\0'; 2678 #ifdef NOT_YET 2679 if (smbfs_fastlookup) { 2680 if (smbfs_nget(vp, ctx->f_name, 2681 ctx->f_nmlen, &ctx->f_attr, &newvp) == 0) 2682 VN_RELE(newvp); 2683 } 2684 #endif /* NOT_YET */ 2685 error = uiomove(dp, dp->d_reclen, UIO_READ, uio); 2686 if (error) 2687 break; 2688 uio->uio_offset = ++offset; 2689 } 2690 if (error == ENOENT) 2691 error = 0; 2692 out: 2693 kmem_free(dp, dbufsiz); 2694 smb_credrele(&scred); 2695 return (error); 2696 } 2697 2698 2699 /* 2700 * The pair of functions VOP_RWLOCK, VOP_RWUNLOCK 2701 * are optional functions that are called by: 2702 * getdents, before/after VOP_READDIR 2703 * pread, before/after ... VOP_READ 2704 * pwrite, before/after ... VOP_WRITE 2705 * (other places) 2706 * 2707 * Careful here: None of the above check for any 2708 * error returns from VOP_RWLOCK / VOP_RWUNLOCK! 2709 * In fact, the return value from _rwlock is NOT 2710 * an error code, but V_WRITELOCK_TRUE / _FALSE. 2711 * 2712 * Therefore, it's up to _this_ code to make sure 2713 * the lock state remains balanced, which means 2714 * we can't "bail out" on interrupts, etc. 2715 */ 2716 2717 /* ARGSUSED2 */ 2718 static int 2719 smbfs_rwlock(vnode_t *vp, int write_lock, caller_context_t *ctp) 2720 { 2721 smbnode_t *np = VTOSMB(vp); 2722 2723 if (!write_lock) { 2724 (void) smbfs_rw_enter_sig(&np->r_rwlock, RW_READER, FALSE); 2725 return (V_WRITELOCK_FALSE); 2726 } 2727 2728 2729 (void) smbfs_rw_enter_sig(&np->r_rwlock, RW_WRITER, FALSE); 2730 return (V_WRITELOCK_TRUE); 2731 } 2732 2733 /* ARGSUSED */ 2734 static void 2735 smbfs_rwunlock(vnode_t *vp, int write_lock, caller_context_t *ctp) 2736 { 2737 smbnode_t *np = VTOSMB(vp); 2738 2739 smbfs_rw_exit(&np->r_rwlock); 2740 } 2741 2742 2743 /* ARGSUSED */ 2744 static int 2745 smbfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, caller_context_t *ct) 2746 { 2747 smbmntinfo_t *smi; 2748 2749 smi = VTOSMI(vp); 2750 2751 if (curproc->p_zone != smi->smi_zone) 2752 return (EPERM); 2753 2754 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 2755 return (EIO); 2756 2757 /* 2758 * Because we stuff the readdir cookie into the offset field 2759 * someone may attempt to do an lseek with the cookie which 2760 * we want to succeed. 2761 */ 2762 if (vp->v_type == VDIR) 2763 return (0); 2764 2765 /* Like NFS3, just check for 63-bit overflow. */ 2766 if (*noffp < 0) 2767 return (EINVAL); 2768 2769 return (0); 2770 } 2771 2772 2773 /* 2774 * XXX 2775 * This op may need to support PSARC 2007/440, nbmand changes for CIFS Service. 2776 */ 2777 static int 2778 smbfs_frlock(vnode_t *vp, int cmd, struct flock64 *bfp, int flag, 2779 offset_t offset, struct flk_callback *flk_cbp, cred_t *cr, 2780 caller_context_t *ct) 2781 { 2782 if (curproc->p_zone != VTOSMI(vp)->smi_zone) 2783 return (EIO); 2784 2785 if (VTOSMI(vp)->smi_flags & SMI_LLOCK) 2786 return (fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct)); 2787 else 2788 return (ENOSYS); 2789 } 2790 2791 /* 2792 * Free storage space associated with the specified vnode. The portion 2793 * to be freed is specified by bfp->l_start and bfp->l_len (already 2794 * normalized to a "whence" of 0). 2795 * 2796 * Called by fcntl(fd, F_FREESP, lkp) for libc:ftruncate, etc. 2797 */ 2798 /* ARGSUSED */ 2799 static int 2800 smbfs_space(vnode_t *vp, int cmd, struct flock64 *bfp, int flag, 2801 offset_t offset, cred_t *cr, caller_context_t *ct) 2802 { 2803 int error; 2804 smbmntinfo_t *smi; 2805 2806 smi = VTOSMI(vp); 2807 2808 if (curproc->p_zone != smi->smi_zone) 2809 return (EIO); 2810 2811 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 2812 return (EIO); 2813 2814 /* Caller (fcntl) has checked v_type */ 2815 ASSERT(vp->v_type == VREG); 2816 if (cmd != F_FREESP) 2817 return (EINVAL); 2818 2819 /* 2820 * Like NFS3, no 32-bit offset checks here. 2821 * Our SMB layer takes care to return EFBIG 2822 * when it has to fallback to a 32-bit call. 2823 */ 2824 2825 error = convoff(vp, bfp, 0, offset); 2826 if (!error) { 2827 ASSERT(bfp->l_start >= 0); 2828 if (bfp->l_len == 0) { 2829 struct vattr va; 2830 2831 /* 2832 * ftruncate should not change the ctime and 2833 * mtime if we truncate the file to its 2834 * previous size. 2835 */ 2836 va.va_mask = AT_SIZE; 2837 error = smbfsgetattr(vp, &va, cr); 2838 if (error || va.va_size == bfp->l_start) 2839 return (error); 2840 va.va_mask = AT_SIZE; 2841 va.va_size = bfp->l_start; 2842 error = smbfssetattr(vp, &va, 0, cr); 2843 } else 2844 error = EINVAL; 2845 } 2846 2847 return (error); 2848 } 2849 2850 /* ARGSUSED */ 2851 static int 2852 smbfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr, 2853 caller_context_t *ct) 2854 { 2855 vfs_t *vfs; 2856 smbmntinfo_t *smi; 2857 struct smb_share *ssp; 2858 2859 vfs = vp->v_vfsp; 2860 smi = VFTOSMI(vfs); 2861 2862 if (curproc->p_zone != smi->smi_zone) 2863 return (EIO); 2864 2865 if (smi->smi_flags & SMI_DEAD || vp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 2866 return (EIO); 2867 2868 switch (cmd) { 2869 case _PC_FILESIZEBITS: 2870 ssp = smi->smi_share; 2871 if (SSTOVC(ssp)->vc_sopt.sv_caps & SMB_CAP_LARGE_FILES) 2872 *valp = 64; 2873 else 2874 *valp = 32; 2875 break; 2876 2877 case _PC_LINK_MAX: 2878 /* We only ever report one link to an object */ 2879 *valp = 1; 2880 break; 2881 2882 case _PC_ACL_ENABLED: 2883 /* 2884 * Always say "yes" here. Our _getsecattr 2885 * will build a trivial ACL when needed, 2886 * i.e. when server does not have ACLs. 2887 */ 2888 *valp = _ACL_ACE_ENABLED; 2889 break; 2890 2891 case _PC_SYMLINK_MAX: /* No symlinks until we do Unix extensions */ 2892 *valp = 0; 2893 break; 2894 2895 case _PC_XATTR_EXISTS: 2896 if (vfs->vfs_flag & VFS_XATTR) { 2897 *valp = smbfs_xa_exists(vp, cr); 2898 break; 2899 } 2900 return (EINVAL); 2901 2902 default: 2903 return (fs_pathconf(vp, cmd, valp, cr, ct)); 2904 } 2905 return (0); 2906 } 2907 2908 /* ARGSUSED */ 2909 static int 2910 smbfs_getsecattr(vnode_t *vp, vsecattr_t *vsa, int flag, cred_t *cr, 2911 caller_context_t *ct) 2912 { 2913 vfs_t *vfsp; 2914 smbmntinfo_t *smi; 2915 int error, uid, gid; 2916 uint_t mask; 2917 2918 vfsp = vp->v_vfsp; 2919 smi = VFTOSMI(vfsp); 2920 2921 if (curproc->p_zone != smi->smi_zone) 2922 return (EIO); 2923 2924 if (smi->smi_flags & SMI_DEAD || vfsp->vfs_flag & VFS_UNMOUNTED) 2925 return (EIO); 2926 2927 /* 2928 * Our _pathconf indicates _ACL_ACE_ENABLED, 2929 * so we should only see VSA_ACE, etc here. 2930 * Note: vn_create asks for VSA_DFACLCNT, 2931 * and it expects ENOSYS and empty data. 2932 */ 2933 mask = vsa->vsa_mask & (VSA_ACE | VSA_ACECNT | 2934 VSA_ACE_ACLFLAGS | VSA_ACE_ALLTYPES); 2935 if (mask == 0) 2936 return (ENOSYS); 2937 2938 /* XXX - access check ACE_READ_ACL? */ 2939 2940 if (smi->smi_fsattr & FILE_PERSISTENT_ACLS) { 2941 error = smbfs_getacl(vp, vsa, &uid, &gid, flag, cr); 2942 /* XXX: Save uid/gid somewhere? */ 2943 } else 2944 error = ENOSYS; 2945 2946 if (error == ENOSYS) 2947 error = fs_fab_acl(vp, vsa, flag, cr, ct); 2948 2949 return (error); 2950 } 2951 2952 /* ARGSUSED */ 2953 static int 2954 smbfs_setsecattr(vnode_t *vp, vsecattr_t *vsa, int flag, cred_t *cr, 2955 caller_context_t *ct) 2956 { 2957 vfs_t *vfsp; 2958 smbmntinfo_t *smi; 2959 int error; 2960 uint_t mask; 2961 2962 vfsp = vp->v_vfsp; 2963 smi = VFTOSMI(vfsp); 2964 2965 if (curproc->p_zone != smi->smi_zone) 2966 return (EIO); 2967 2968 if (smi->smi_flags & SMI_DEAD || vfsp->vfs_flag & VFS_UNMOUNTED) 2969 return (EIO); 2970 2971 /* 2972 * Our _pathconf indicates _ACL_ACE_ENABLED, 2973 * so we should only see VSA_ACE, etc here. 2974 */ 2975 mask = vsa->vsa_mask & (VSA_ACE | VSA_ACECNT); 2976 if (mask == 0) 2977 return (ENOSYS); 2978 2979 /* 2980 * If and when smbfs_access is extended, we can 2981 * check ACE_WRITE_ACL here instead. (XXX todo) 2982 * For now, in-line parts of smbfs_access, 2983 * i.e. only allow _setacl by the owner, 2984 * and check for read-only FS. 2985 */ 2986 if (vfsp->vfs_flag & VFS_RDONLY) 2987 return (EROFS); 2988 if (crgetuid(cr) != smi->smi_args.uid) 2989 return (EACCES); 2990 2991 if (smi->smi_fsattr & FILE_PERSISTENT_ACLS) { 2992 error = smbfs_setacl(vp, vsa, -1, -1, flag, cr); 2993 } else 2994 error = ENOSYS; 2995 2996 return (error); 2997 } 2998 2999 3000 /* 3001 * XXX 3002 * This op should eventually support PSARC 2007/268. 3003 */ 3004 static int 3005 smbfs_shrlock(vnode_t *vp, int cmd, struct shrlock *shr, int flag, cred_t *cr, 3006 caller_context_t *ct) 3007 { 3008 if (curproc->p_zone != VTOSMI(vp)->smi_zone) 3009 return (EIO); 3010 3011 if (VTOSMI(vp)->smi_flags & SMI_LLOCK) 3012 return (fs_shrlock(vp, cmd, shr, flag, cr, ct)); 3013 else 3014 return (ENOSYS); 3015 } 3016