1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2007-2009 Google Inc. and Amit Singh 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are 9 * met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above 14 * copyright notice, this list of conditions and the following disclaimer 15 * in the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Google Inc. nor the names of its 18 * contributors may be used to endorse or promote products derived from 19 * this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 * Copyright (C) 2005 Csaba Henk. 34 * All rights reserved. 35 * 36 * Copyright (c) 2019 The FreeBSD Foundation 37 * 38 * Portions of this software were developed by BFF Storage Systems, LLC under 39 * sponsorship from the FreeBSD Foundation. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 50 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 */ 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/counter.h> 66 #include <sys/module.h> 67 #include <sys/errno.h> 68 #include <sys/kernel.h> 69 #include <sys/conf.h> 70 #include <sys/uio.h> 71 #include <sys/malloc.h> 72 #include <sys/queue.h> 73 #include <sys/lock.h> 74 #include <sys/mutex.h> 75 #include <sys/sdt.h> 76 #include <sys/sx.h> 77 #include <sys/proc.h> 78 #include <sys/mount.h> 79 #include <sys/vnode.h> 80 #include <sys/namei.h> 81 #include <sys/stat.h> 82 #include <sys/unistd.h> 83 #include <sys/filedesc.h> 84 #include <sys/file.h> 85 #include <sys/fcntl.h> 86 #include <sys/dirent.h> 87 #include <sys/bio.h> 88 #include <sys/buf.h> 89 #include <sys/sysctl.h> 90 #include <sys/priv.h> 91 92 #include "fuse.h" 93 #include "fuse_file.h" 94 #include "fuse_internal.h" 95 #include "fuse_io.h" 96 #include "fuse_ipc.h" 97 #include "fuse_node.h" 98 #include "fuse_file.h" 99 100 SDT_PROVIDER_DECLARE(fusefs); 101 /* 102 * Fuse trace probe: 103 * arg0: verbosity. Higher numbers give more verbose messages 104 * arg1: Textual message 105 */ 106 SDT_PROBE_DEFINE2(fusefs, , internal, trace, "int", "char*"); 107 108 #ifdef ZERO_PAD_INCOMPLETE_BUFS 109 static int isbzero(void *buf, size_t len); 110 111 #endif 112 113 counter_u64_t fuse_lookup_cache_hits; 114 counter_u64_t fuse_lookup_cache_misses; 115 116 SYSCTL_COUNTER_U64(_vfs_fusefs_stats, OID_AUTO, lookup_cache_hits, CTLFLAG_RD, 117 &fuse_lookup_cache_hits, "number of positive cache hits in lookup"); 118 119 SYSCTL_COUNTER_U64(_vfs_fusefs_stats, OID_AUTO, lookup_cache_misses, CTLFLAG_RD, 120 &fuse_lookup_cache_misses, "number of cache misses in lookup"); 121 122 int 123 fuse_internal_get_cached_vnode(struct mount* mp, ino_t ino, int flags, 124 struct vnode **vpp) 125 { 126 struct bintime now; 127 struct thread *td = curthread; 128 uint64_t nodeid = ino; 129 int error; 130 131 *vpp = NULL; 132 133 error = vfs_hash_get(mp, fuse_vnode_hash(nodeid), flags, td, vpp, 134 fuse_vnode_cmp, &nodeid); 135 if (error) 136 return error; 137 /* 138 * Check the entry cache timeout. We have to do this within fusefs 139 * instead of by using cache_enter_time/cache_lookup because those 140 * routines are only intended to work with pathnames, not inodes 141 */ 142 if (*vpp != NULL) { 143 getbinuptime(&now); 144 if (bintime_cmp(&(VTOFUD(*vpp)->entry_cache_timeout), &now, >)){ 145 counter_u64_add(fuse_lookup_cache_hits, 1); 146 return 0; 147 } else { 148 /* Entry cache timeout */ 149 counter_u64_add(fuse_lookup_cache_misses, 1); 150 cache_purge(*vpp); 151 vput(*vpp); 152 *vpp = NULL; 153 } 154 } 155 return 0; 156 } 157 158 SDT_PROBE_DEFINE0(fusefs, , internal, access_vadmin); 159 /* Synchronously send a FUSE_ACCESS operation */ 160 int 161 fuse_internal_access(struct vnode *vp, 162 accmode_t mode, 163 struct thread *td, 164 struct ucred *cred) 165 { 166 int err = 0; 167 uint32_t mask = F_OK; 168 int dataflags; 169 struct mount *mp; 170 struct fuse_dispatcher fdi; 171 struct fuse_access_in *fai; 172 struct fuse_data *data; 173 174 mp = vnode_mount(vp); 175 176 data = fuse_get_mpdata(mp); 177 dataflags = data->dataflags; 178 179 if (mode == 0) 180 return 0; 181 182 if (mode & VMODIFY_PERMS && vfs_isrdonly(mp)) { 183 switch (vp->v_type) { 184 case VDIR: 185 /* FALLTHROUGH */ 186 case VLNK: 187 /* FALLTHROUGH */ 188 case VREG: 189 return EROFS; 190 default: 191 break; 192 } 193 } 194 195 /* Unless explicitly permitted, deny everyone except the fs owner. */ 196 if (!(dataflags & FSESS_DAEMON_CAN_SPY)) { 197 if (fuse_match_cred(data->daemoncred, cred)) 198 return EPERM; 199 } 200 201 if (dataflags & FSESS_DEFAULT_PERMISSIONS) { 202 struct vattr va; 203 204 fuse_internal_getattr(vp, &va, cred, td); 205 return vaccess(vp->v_type, va.va_mode, va.va_uid, 206 va.va_gid, mode, cred); 207 } 208 209 if (mode & VADMIN) { 210 /* 211 * The FUSE protocol doesn't have an equivalent of VADMIN, so 212 * it's a bug if we ever reach this point with that bit set. 213 */ 214 SDT_PROBE0(fusefs, , internal, access_vadmin); 215 } 216 217 if (fsess_not_impl(mp, FUSE_ACCESS)) 218 return 0; 219 220 if ((mode & (VWRITE | VAPPEND)) != 0) 221 mask |= W_OK; 222 if ((mode & VREAD) != 0) 223 mask |= R_OK; 224 if ((mode & VEXEC) != 0) 225 mask |= X_OK; 226 227 fdisp_init(&fdi, sizeof(*fai)); 228 fdisp_make_vp(&fdi, FUSE_ACCESS, vp, td, cred); 229 230 fai = fdi.indata; 231 fai->mask = mask; 232 233 err = fdisp_wait_answ(&fdi); 234 fdisp_destroy(&fdi); 235 236 if (err == ENOSYS) { 237 fsess_set_notimpl(mp, FUSE_ACCESS); 238 err = 0; 239 } 240 return err; 241 } 242 243 /* 244 * Cache FUSE attributes from attr, in attribute cache associated with vnode 245 * 'vp'. Optionally, if argument 'vap' is not NULL, store a copy of the 246 * converted attributes there as well. 247 * 248 * If the nominal attribute cache TTL is zero, do not cache on the 'vp' (but do 249 * return the result to the caller). 250 */ 251 void 252 fuse_internal_cache_attrs(struct vnode *vp, struct fuse_attr *attr, 253 uint64_t attr_valid, uint32_t attr_valid_nsec, struct vattr *vap, 254 bool from_server) 255 { 256 struct mount *mp; 257 struct fuse_vnode_data *fvdat; 258 struct fuse_data *data; 259 struct vattr *vp_cache_at; 260 261 mp = vnode_mount(vp); 262 fvdat = VTOFUD(vp); 263 data = fuse_get_mpdata(mp); 264 265 ASSERT_CACHED_ATTRS_LOCKED(vp); 266 267 fuse_validity_2_bintime(attr_valid, attr_valid_nsec, 268 &fvdat->attr_cache_timeout); 269 270 if (vnode_isreg(vp) && 271 fvdat->cached_attrs.va_size != VNOVAL && 272 fvdat->flag & FN_SIZECHANGE && 273 attr->size != fvdat->cached_attrs.va_size) 274 { 275 if (data->cache_mode == FUSE_CACHE_WB) 276 { 277 const char *msg; 278 279 /* 280 * The server changed the file's size even though we're 281 * using writeback cacheing and and we have outstanding 282 * dirty writes! That's a server bug. 283 */ 284 if (fuse_libabi_geq(data, 7, 23)) { 285 msg = "writeback cache incoherent! " 286 "To prevent data corruption, disable " 287 "the writeback cache according to your " 288 "FUSE server's documentation."; 289 } else { 290 msg = "writeback cache incoherent! " 291 "To prevent data corruption, disable " 292 "the writeback cache by setting " 293 "vfs.fusefs.data_cache_mode to 0 or 1."; 294 } 295 fuse_warn(data, FSESS_WARN_WB_CACHE_INCOHERENT, msg); 296 } 297 if (fuse_vnode_attr_cache_valid(vp) && 298 data->cache_mode != FUSE_CACHE_UC) 299 { 300 /* 301 * The server changed the file's size even though we 302 * have it cached and our cache has not yet expired. 303 * That's a bug. 304 */ 305 fuse_warn(data, FSESS_WARN_CACHE_INCOHERENT, 306 "cache incoherent! " 307 "To prevent " 308 "data corruption, disable the data cache " 309 "by mounting with -o direct_io, or as " 310 "directed otherwise by your FUSE server's " 311 "documentation."); 312 } 313 } 314 315 /* Fix our buffers if the filesize changed without us knowing */ 316 if (vnode_isreg(vp) && attr->size != fvdat->cached_attrs.va_size) { 317 (void)fuse_vnode_setsize(vp, attr->size, from_server); 318 fvdat->cached_attrs.va_size = attr->size; 319 } 320 321 if (attr_valid > 0 || attr_valid_nsec > 0) 322 vp_cache_at = &(fvdat->cached_attrs); 323 else if (vap != NULL) 324 vp_cache_at = vap; 325 else 326 return; 327 328 vp_cache_at->va_fsid = mp->mnt_stat.f_fsid.val[0]; 329 vp_cache_at->va_fileid = attr->ino; 330 vp_cache_at->va_mode = attr->mode & ~S_IFMT; 331 vp_cache_at->va_nlink = attr->nlink; 332 vp_cache_at->va_uid = attr->uid; 333 vp_cache_at->va_gid = attr->gid; 334 vp_cache_at->va_rdev = attr->rdev; 335 vp_cache_at->va_size = attr->size; 336 /* XXX on i386, seconds are truncated to 32 bits */ 337 vp_cache_at->va_atime.tv_sec = attr->atime; 338 vp_cache_at->va_atime.tv_nsec = attr->atimensec; 339 vp_cache_at->va_mtime.tv_sec = attr->mtime; 340 vp_cache_at->va_mtime.tv_nsec = attr->mtimensec; 341 vp_cache_at->va_ctime.tv_sec = attr->ctime; 342 vp_cache_at->va_ctime.tv_nsec = attr->ctimensec; 343 if (fuse_libabi_geq(data, 7, 9) && attr->blksize > 0) 344 vp_cache_at->va_blocksize = attr->blksize; 345 else 346 vp_cache_at->va_blocksize = PAGE_SIZE; 347 vp_cache_at->va_type = IFTOVT(attr->mode); 348 vp_cache_at->va_bytes = attr->blocks * S_BLKSIZE; 349 vp_cache_at->va_flags = 0; 350 351 if (vap != vp_cache_at && vap != NULL) 352 memcpy(vap, vp_cache_at, sizeof(*vap)); 353 } 354 355 /* fsync */ 356 357 int 358 fuse_internal_fsync_callback(struct fuse_ticket *tick, struct uio *uio) 359 { 360 if (tick->tk_aw_ohead.error == ENOSYS) { 361 fsess_set_notimpl(tick->tk_data->mp, fticket_opcode(tick)); 362 } 363 return 0; 364 } 365 366 int 367 fuse_internal_fsync(struct vnode *vp, 368 struct thread *td, 369 int waitfor, 370 bool datasync) 371 { 372 struct fuse_fsync_in *ffsi = NULL; 373 struct fuse_dispatcher fdi; 374 struct fuse_filehandle *fufh; 375 struct fuse_vnode_data *fvdat = VTOFUD(vp); 376 struct mount *mp = vnode_mount(vp); 377 int op = FUSE_FSYNC; 378 int err = 0; 379 380 if (fsess_not_impl(vnode_mount(vp), 381 (vnode_vtype(vp) == VDIR ? FUSE_FSYNCDIR : FUSE_FSYNC))) { 382 return 0; 383 } 384 if (vnode_isdir(vp)) 385 op = FUSE_FSYNCDIR; 386 387 if (fsess_not_impl(mp, op)) 388 return 0; 389 390 fdisp_init(&fdi, sizeof(*ffsi)); 391 /* 392 * fsync every open file handle for this file, because we can't be sure 393 * which file handle the caller is really referring to. 394 */ 395 LIST_FOREACH(fufh, &fvdat->handles, next) { 396 fdi.iosize = sizeof(*ffsi); 397 if (ffsi == NULL) 398 fdisp_make_vp(&fdi, op, vp, td, NULL); 399 else 400 fdisp_refresh_vp(&fdi, op, vp, td, NULL); 401 ffsi = fdi.indata; 402 ffsi->fh = fufh->fh_id; 403 ffsi->fsync_flags = 0; 404 405 if (datasync) 406 ffsi->fsync_flags = FUSE_FSYNC_FDATASYNC; 407 408 if (waitfor == MNT_WAIT) { 409 err = fdisp_wait_answ(&fdi); 410 } else { 411 fuse_insert_callback(fdi.tick, 412 fuse_internal_fsync_callback); 413 fuse_insert_message(fdi.tick, false); 414 } 415 if (err == ENOSYS) { 416 /* ENOSYS means "success, and don't call again" */ 417 fsess_set_notimpl(mp, op); 418 err = 0; 419 break; 420 } 421 } 422 fdisp_destroy(&fdi); 423 424 return err; 425 } 426 427 /* Asynchronous invalidation */ 428 SDT_PROBE_DEFINE3(fusefs, , internal, invalidate_entry, 429 "struct vnode*", "struct fuse_notify_inval_entry_out*", "char*"); 430 int 431 fuse_internal_invalidate_entry(struct mount *mp, struct uio *uio) 432 { 433 struct fuse_notify_inval_entry_out fnieo; 434 struct componentname cn; 435 struct vnode *dvp, *vp; 436 char name[PATH_MAX]; 437 int err; 438 439 if ((err = uiomove(&fnieo, sizeof(fnieo), uio)) != 0) 440 return (err); 441 442 if (fnieo.namelen >= sizeof(name)) 443 return (EINVAL); 444 445 if ((err = uiomove(name, fnieo.namelen, uio)) != 0) 446 return (err); 447 name[fnieo.namelen] = '\0'; 448 /* fusefs does not cache "." or ".." entries */ 449 if (strncmp(name, ".", sizeof(".")) == 0 || 450 strncmp(name, "..", sizeof("..")) == 0) 451 return (0); 452 453 if (fnieo.parent == FUSE_ROOT_ID) 454 err = VFS_ROOT(mp, LK_SHARED, &dvp); 455 else 456 err = fuse_internal_get_cached_vnode( mp, fnieo.parent, 457 LK_SHARED, &dvp); 458 SDT_PROBE3(fusefs, , internal, invalidate_entry, dvp, &fnieo, name); 459 /* 460 * If dvp is not in the cache, then it must've been reclaimed. And 461 * since fuse_vnop_reclaim does a cache_purge, name's entry must've 462 * been invalidated already. So we can safely return if dvp == NULL 463 */ 464 if (err != 0 || dvp == NULL) 465 return (err); 466 /* 467 * XXX we can't check dvp's generation because the FUSE invalidate 468 * entry message doesn't include it. Worse case is that we invalidate 469 * an entry that didn't need to be invalidated. 470 */ 471 472 cn.cn_nameiop = LOOKUP; 473 cn.cn_flags = 0; /* !MAKEENTRY means free cached entry */ 474 cn.cn_cred = curthread->td_ucred; 475 cn.cn_lkflags = LK_SHARED; 476 cn.cn_pnbuf = NULL; 477 cn.cn_nameptr = name; 478 cn.cn_namelen = fnieo.namelen; 479 err = cache_lookup(dvp, &vp, &cn, NULL, NULL); 480 MPASS(err == 0); 481 CACHED_ATTR_LOCK(dvp); 482 fuse_vnode_clear_attr_cache(dvp); 483 CACHED_ATTR_UNLOCK(dvp); 484 vput(dvp); 485 return (0); 486 } 487 488 SDT_PROBE_DEFINE2(fusefs, , internal, invalidate_inode, 489 "struct vnode*", "struct fuse_notify_inval_inode_out *"); 490 int 491 fuse_internal_invalidate_inode(struct mount *mp, struct uio *uio) 492 { 493 struct fuse_notify_inval_inode_out fniio; 494 struct vnode *vp; 495 int err; 496 497 if ((err = uiomove(&fniio, sizeof(fniio), uio)) != 0) 498 return (err); 499 500 if (fniio.ino == FUSE_ROOT_ID) 501 err = VFS_ROOT(mp, LK_EXCLUSIVE, &vp); 502 else 503 err = fuse_internal_get_cached_vnode(mp, fniio.ino, 504 LK_EXCLUSIVE, &vp); 505 SDT_PROBE2(fusefs, , internal, invalidate_inode, vp, &fniio); 506 if (err != 0 || vp == NULL) 507 return (err); 508 /* 509 * XXX we can't check vp's generation because the FUSE invalidate 510 * entry message doesn't include it. Worse case is that we invalidate 511 * an inode that didn't need to be invalidated. 512 */ 513 514 /* 515 * Flush and invalidate buffers if off >= 0. Technically we only need 516 * to flush and invalidate the range of offsets [off, off + len), but 517 * for simplicity's sake we do everything. 518 */ 519 if (fniio.off >= 0) 520 fuse_io_invalbuf(vp, curthread); 521 fuse_vnode_clear_attr_cache(vp); 522 vput(vp); 523 return (0); 524 } 525 526 /* mknod */ 527 int 528 fuse_internal_mknod(struct vnode *dvp, struct vnode **vpp, 529 struct componentname *cnp, struct vattr *vap) 530 { 531 struct fuse_data *data; 532 struct fuse_mknod_in fmni; 533 size_t insize; 534 535 data = fuse_get_mpdata(dvp->v_mount); 536 537 fmni.mode = MAKEIMODE(vap->va_type, vap->va_mode); 538 fmni.rdev = vap->va_rdev; 539 if (fuse_libabi_geq(data, 7, 12)) { 540 insize = sizeof(fmni); 541 fmni.umask = curthread->td_proc->p_pd->pd_cmask; 542 fmni.padding = 0; 543 } else { 544 insize = FUSE_COMPAT_MKNOD_IN_SIZE; 545 } 546 return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKNOD, &fmni, 547 insize, vap->va_type)); 548 } 549 550 /* readdir */ 551 552 int 553 fuse_internal_readdir(struct vnode *vp, 554 struct uio *uio, 555 struct fuse_filehandle *fufh, 556 struct fuse_iov *cookediov, 557 int *ncookies, 558 uint64_t *cookies) 559 { 560 int err = 0; 561 struct fuse_dispatcher fdi; 562 struct fuse_read_in *fri = NULL; 563 564 if (uio_resid(uio) == 0) 565 return 0; 566 fdisp_init(&fdi, 0); 567 568 /* 569 * Note that we DO NOT have a UIO_SYSSPACE here (so no need for p2p 570 * I/O). 571 */ 572 while (uio_resid(uio) > 0) { 573 fdi.iosize = sizeof(*fri); 574 fdisp_make_vp(&fdi, FUSE_READDIR, vp, NULL, NULL); 575 fri = fdi.indata; 576 fri->fh = fufh->fh_id; 577 fri->offset = uio_offset(uio); 578 fri->size = MIN(uio->uio_resid, 579 fuse_get_mpdata(vp->v_mount)->max_read); 580 581 if ((err = fdisp_wait_answ(&fdi))) 582 break; 583 if ((err = fuse_internal_readdir_processdata(uio, fri->size, 584 fdi.answ, fdi.iosize, cookediov, ncookies, &cookies))) 585 break; 586 } 587 588 fdisp_destroy(&fdi); 589 return ((err == -1) ? 0 : err); 590 } 591 592 /* 593 * Return -1 to indicate that this readdir is finished, 0 if it copied 594 * all the directory data read in and it may be possible to read more 595 * and greater than 0 for a failure. 596 */ 597 int 598 fuse_internal_readdir_processdata(struct uio *uio, 599 size_t reqsize, 600 void *buf, 601 size_t bufsize, 602 struct fuse_iov *cookediov, 603 int *ncookies, 604 uint64_t **cookiesp) 605 { 606 int err = 0; 607 int oreclen; 608 size_t freclen; 609 610 struct dirent *de; 611 struct fuse_dirent *fudge; 612 uint64_t *cookies; 613 614 cookies = *cookiesp; 615 if (bufsize < FUSE_NAME_OFFSET) 616 return -1; 617 for (;;) { 618 if (bufsize < FUSE_NAME_OFFSET) { 619 err = -1; 620 break; 621 } 622 fudge = (struct fuse_dirent *)buf; 623 freclen = FUSE_DIRENT_SIZE(fudge); 624 625 if (bufsize < freclen) { 626 /* 627 * This indicates a partial directory entry at the 628 * end of the directory data. 629 */ 630 err = -1; 631 break; 632 } 633 #ifdef ZERO_PAD_INCOMPLETE_BUFS 634 if (isbzero(buf, FUSE_NAME_OFFSET)) { 635 err = -1; 636 break; 637 } 638 #endif 639 640 if (!fudge->namelen || fudge->namelen > MAXNAMLEN) { 641 err = EINVAL; 642 break; 643 } 644 oreclen = GENERIC_DIRSIZ((struct pseudo_dirent *) 645 &fudge->namelen); 646 647 if (oreclen > uio_resid(uio)) { 648 /* Out of space for the dir so we are done. */ 649 err = -1; 650 break; 651 } 652 fiov_adjust(cookediov, oreclen); 653 bzero(cookediov->base, oreclen); 654 655 de = (struct dirent *)cookediov->base; 656 de->d_fileno = fudge->ino; 657 de->d_off = fudge->off; 658 de->d_reclen = oreclen; 659 de->d_type = fudge->type; 660 de->d_namlen = fudge->namelen; 661 memcpy((char *)cookediov->base + sizeof(struct dirent) - 662 MAXNAMLEN - 1, 663 (char *)buf + FUSE_NAME_OFFSET, fudge->namelen); 664 dirent_terminate(de); 665 666 err = uiomove(cookediov->base, cookediov->len, uio); 667 if (err) 668 break; 669 if (cookies != NULL) { 670 if (*ncookies == 0) { 671 err = -1; 672 break; 673 } 674 *cookies = fudge->off; 675 cookies++; 676 (*ncookies)--; 677 } 678 buf = (char *)buf + freclen; 679 bufsize -= freclen; 680 uio_setoffset(uio, fudge->off); 681 } 682 *cookiesp = cookies; 683 684 return err; 685 } 686 687 /* remove */ 688 689 int 690 fuse_internal_remove(struct vnode *dvp, 691 struct vnode *vp, 692 struct componentname *cnp, 693 enum fuse_opcode op) 694 { 695 struct fuse_dispatcher fdi; 696 nlink_t nlink; 697 int err = 0; 698 699 ASSERT_CACHED_ATTRS_LOCKED(vp); 700 701 fdisp_init(&fdi, cnp->cn_namelen + 1); 702 fdisp_make_vp(&fdi, op, dvp, curthread, cnp->cn_cred); 703 704 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen); 705 ((char *)fdi.indata)[cnp->cn_namelen] = '\0'; 706 707 err = fdisp_wait_answ(&fdi); 708 fdisp_destroy(&fdi); 709 710 if (err) 711 return (err); 712 713 /* 714 * Access the cached nlink even if the attr cached has expired. If 715 * it's inaccurate, the worst that will happen is: 716 * 1) We'll recycle the vnode even though the file has another link we 717 * don't know about, costing a bit of cpu time, or 718 * 2) We won't recycle the vnode even though all of its links are gone. 719 * It will linger around until vnlru reclaims it, costing a bit of 720 * temporary memory. 721 */ 722 nlink = VTOFUD(vp)->cached_attrs.va_nlink--; 723 724 /* 725 * Purge the parent's attribute cache because the daemon 726 * should've updated its mtime and ctime. 727 */ 728 fuse_vnode_clear_attr_cache(dvp); 729 730 /* NB: nlink could be zero if it was never cached */ 731 if (nlink <= 1 || vnode_vtype(vp) == VDIR) { 732 fuse_internal_vnode_disappear(vp); 733 } else { 734 cache_purge(vp); 735 fuse_vnode_update(vp, FN_CTIMECHANGE); 736 } 737 738 return err; 739 } 740 741 /* rename */ 742 743 int 744 fuse_internal_rename(struct vnode *fdvp, 745 struct componentname *fcnp, 746 struct vnode *tdvp, 747 struct componentname *tcnp) 748 { 749 struct fuse_dispatcher fdi; 750 struct fuse_rename_in *fri; 751 int err = 0; 752 753 fdisp_init(&fdi, sizeof(*fri) + fcnp->cn_namelen + tcnp->cn_namelen + 2); 754 fdisp_make_vp(&fdi, FUSE_RENAME, fdvp, curthread, tcnp->cn_cred); 755 756 fri = fdi.indata; 757 fri->newdir = VTOI(tdvp); 758 memcpy((char *)fdi.indata + sizeof(*fri), fcnp->cn_nameptr, 759 fcnp->cn_namelen); 760 ((char *)fdi.indata)[sizeof(*fri) + fcnp->cn_namelen] = '\0'; 761 memcpy((char *)fdi.indata + sizeof(*fri) + fcnp->cn_namelen + 1, 762 tcnp->cn_nameptr, tcnp->cn_namelen); 763 ((char *)fdi.indata)[sizeof(*fri) + fcnp->cn_namelen + 764 tcnp->cn_namelen + 1] = '\0'; 765 766 err = fdisp_wait_answ(&fdi); 767 fdisp_destroy(&fdi); 768 return err; 769 } 770 771 /* strategy */ 772 773 /* entity creation */ 774 775 void 776 fuse_internal_newentry_makerequest(struct mount *mp, 777 uint64_t dnid, 778 struct componentname *cnp, 779 enum fuse_opcode op, 780 void *buf, 781 size_t bufsize, 782 struct fuse_dispatcher *fdip) 783 { 784 fdip->iosize = bufsize + cnp->cn_namelen + 1; 785 786 fdisp_make(fdip, op, mp, dnid, curthread, cnp->cn_cred); 787 memcpy(fdip->indata, buf, bufsize); 788 memcpy((char *)fdip->indata + bufsize, cnp->cn_nameptr, cnp->cn_namelen); 789 ((char *)fdip->indata)[bufsize + cnp->cn_namelen] = '\0'; 790 } 791 792 int 793 fuse_internal_newentry_core(struct vnode *dvp, 794 struct vnode **vpp, 795 struct componentname *cnp, 796 __enum_uint8(vtype) vtyp, 797 struct fuse_dispatcher *fdip) 798 { 799 int err = 0; 800 struct fuse_entry_out *feo; 801 struct mount *mp = vnode_mount(dvp); 802 803 if ((err = fdisp_wait_answ(fdip))) { 804 return err; 805 } 806 feo = fdip->answ; 807 808 if ((err = fuse_internal_checkentry(feo, vtyp))) { 809 return err; 810 } 811 err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, vtyp); 812 if (err) { 813 fuse_internal_forget_send(mp, curthread, cnp->cn_cred, 814 feo->nodeid, 1); 815 return err; 816 } 817 818 /* 819 * Purge the parent's attribute cache because the daemon should've 820 * updated its mtime and ctime 821 */ 822 fuse_vnode_clear_attr_cache(dvp); 823 824 fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid, 825 feo->attr_valid_nsec, NULL, true); 826 827 return err; 828 } 829 830 int 831 fuse_internal_newentry(struct vnode *dvp, 832 struct vnode **vpp, 833 struct componentname *cnp, 834 enum fuse_opcode op, 835 void *buf, 836 size_t bufsize, 837 __enum_uint8(vtype) vtype) 838 { 839 int err; 840 struct fuse_dispatcher fdi; 841 struct mount *mp = vnode_mount(dvp); 842 843 fdisp_init(&fdi, 0); 844 fuse_internal_newentry_makerequest(mp, VTOI(dvp), cnp, op, buf, 845 bufsize, &fdi); 846 err = fuse_internal_newentry_core(dvp, vpp, cnp, vtype, &fdi); 847 fdisp_destroy(&fdi); 848 849 return err; 850 } 851 852 /* entity destruction */ 853 854 int 855 fuse_internal_forget_callback(struct fuse_ticket *ftick, struct uio *uio) 856 { 857 fuse_internal_forget_send(ftick->tk_data->mp, curthread, NULL, 858 ((struct fuse_in_header *)ftick->tk_ms_fiov.base)->nodeid, 1); 859 860 return 0; 861 } 862 863 void 864 fuse_internal_forget_send(struct mount *mp, 865 struct thread *td, 866 struct ucred *cred, 867 uint64_t nodeid, 868 uint64_t nlookup) 869 { 870 871 struct fuse_dispatcher fdi; 872 struct fuse_forget_in *ffi; 873 874 /* 875 * KASSERT(nlookup > 0, ("zero-times forget for vp #%llu", 876 * (long long unsigned) nodeid)); 877 */ 878 879 fdisp_init(&fdi, sizeof(*ffi)); 880 fdisp_make(&fdi, FUSE_FORGET, mp, nodeid, td, cred); 881 882 ffi = fdi.indata; 883 ffi->nlookup = nlookup; 884 885 fuse_insert_message(fdi.tick, false); 886 fdisp_destroy(&fdi); 887 } 888 889 /* Fetch the vnode's attributes from the daemon*/ 890 int 891 fuse_internal_do_getattr(struct vnode *vp, struct vattr *vap, 892 struct ucred *cred, struct thread *td) 893 { 894 struct fuse_dispatcher fdi; 895 struct fuse_vnode_data *fvdat = VTOFUD(vp); 896 struct fuse_getattr_in *fgai; 897 struct fuse_attr_out *fao; 898 __enum_uint8(vtype) vtyp; 899 int err; 900 901 fdisp_init(&fdi, sizeof(*fgai)); 902 fdisp_make_vp(&fdi, FUSE_GETATTR, vp, td, cred); 903 fgai = fdi.indata; 904 /* 905 * We could look up a file handle and set it in fgai->fh, but that 906 * involves extra runtime work and I'm unaware of any file systems that 907 * care. 908 */ 909 fgai->getattr_flags = 0; 910 if ((err = fdisp_wait_answ(&fdi))) { 911 if (err == ENOENT) 912 fuse_internal_vnode_disappear(vp); 913 goto out; 914 } 915 916 fao = (struct fuse_attr_out *)fdi.answ; 917 vtyp = IFTOVT(fao->attr.mode); 918 919 CACHED_ATTR_LOCK(vp); 920 if (fvdat->flag & FN_SIZECHANGE) 921 fao->attr.size = fvdat->cached_attrs.va_size; 922 if (fvdat->flag & FN_ATIMECHANGE) { 923 fao->attr.atime = fvdat->cached_attrs.va_atime.tv_sec; 924 fao->attr.atimensec = fvdat->cached_attrs.va_atime.tv_nsec; 925 } 926 if (fvdat->flag & FN_CTIMECHANGE) { 927 fao->attr.ctime = fvdat->cached_attrs.va_ctime.tv_sec; 928 fao->attr.ctimensec = fvdat->cached_attrs.va_ctime.tv_nsec; 929 } 930 if (fvdat->flag & FN_MTIMECHANGE) { 931 fao->attr.mtime = fvdat->cached_attrs.va_mtime.tv_sec; 932 fao->attr.mtimensec = fvdat->cached_attrs.va_mtime.tv_nsec; 933 } 934 935 fuse_internal_cache_attrs(vp, &fao->attr, fao->attr_valid, 936 fao->attr_valid_nsec, vap, true); 937 938 CACHED_ATTR_UNLOCK(vp); 939 if (vtyp != vnode_vtype(vp)) { 940 fuse_internal_vnode_disappear(vp); 941 err = ENOENT; 942 } 943 944 out: 945 fdisp_destroy(&fdi); 946 return err; 947 } 948 949 /* Read a vnode's attributes from cache or fetch them from the fuse daemon */ 950 int 951 fuse_internal_getattr(struct vnode *vp, struct vattr *vap, struct ucred *cred, 952 struct thread *td) 953 { 954 struct vattr *attrs; 955 956 CACHED_ATTR_LOCK(vp); 957 if ((attrs = VTOVA(vp)) != NULL) { 958 *vap = *attrs; /* struct copy */ 959 CACHED_ATTR_UNLOCK(vp); 960 return 0; 961 } else 962 CACHED_ATTR_UNLOCK(vp); 963 964 return fuse_internal_do_getattr(vp, vap, cred, td); 965 } 966 967 void 968 fuse_internal_vnode_disappear(struct vnode *vp) 969 { 970 struct fuse_vnode_data *fvdat = VTOFUD(vp); 971 972 ASSERT_VOP_ELOCKED(vp, "fuse_internal_vnode_disappear"); 973 fvdat->flag |= FN_REVOKED; 974 cache_purge(vp); 975 } 976 977 /* fuse start/stop */ 978 979 SDT_PROBE_DEFINE2(fusefs, , internal, init_done, 980 "struct fuse_data*", "struct fuse_init_out*"); 981 int 982 fuse_internal_init_callback(struct fuse_ticket *tick, struct uio *uio) 983 { 984 int err = 0; 985 struct fuse_data *data = tick->tk_data; 986 struct fuse_init_out *fiio = NULL; 987 988 if (fdata_get_dead(data)) 989 goto out; 990 991 if ((err = tick->tk_aw_ohead.error)) { 992 goto out; 993 } 994 if ((err = fticket_pull(tick, uio))) { 995 goto out; 996 } 997 fiio = fticket_resp(tick)->base; 998 999 data->fuse_libabi_major = fiio->major; 1000 data->fuse_libabi_minor = fiio->minor; 1001 if (!fuse_libabi_geq(data, 7, 4)) { 1002 /* 1003 * With a little work we could support servers as old as 7.1. 1004 * But there would be little payoff. 1005 */ 1006 SDT_PROBE2(fusefs, , internal, trace, 1, 1007 "userspace version too low"); 1008 err = EPROTONOSUPPORT; 1009 goto out; 1010 } 1011 1012 if (fuse_libabi_geq(data, 7, 5)) { 1013 if (fticket_resp(tick)->len == sizeof(struct fuse_init_out) || 1014 fticket_resp(tick)->len == FUSE_COMPAT_22_INIT_OUT_SIZE) { 1015 data->max_write = fiio->max_write; 1016 if (fiio->flags & FUSE_ASYNC_READ) 1017 data->dataflags |= FSESS_ASYNC_READ; 1018 if (fiio->flags & FUSE_POSIX_LOCKS) 1019 data->dataflags |= FSESS_POSIX_LOCKS; 1020 if (fiio->flags & FUSE_EXPORT_SUPPORT) 1021 data->dataflags |= FSESS_EXPORT_SUPPORT; 1022 /* 1023 * Don't bother to check FUSE_BIG_WRITES, because it's 1024 * redundant with max_write 1025 */ 1026 /* 1027 * max_background and congestion_threshold are not 1028 * implemented 1029 */ 1030 } else { 1031 err = EINVAL; 1032 } 1033 } else { 1034 /* Old fixed values */ 1035 data->max_write = 4096; 1036 } 1037 1038 if (fuse_libabi_geq(data, 7, 6)) 1039 data->max_readahead_blocks = fiio->max_readahead / maxbcachebuf; 1040 1041 if (!fuse_libabi_geq(data, 7, 7)) 1042 fsess_set_notimpl(data->mp, FUSE_INTERRUPT); 1043 1044 if (!fuse_libabi_geq(data, 7, 8)) { 1045 fsess_set_notimpl(data->mp, FUSE_BMAP); 1046 fsess_set_notimpl(data->mp, FUSE_DESTROY); 1047 } 1048 1049 if (!fuse_libabi_geq(data, 7, 19)) { 1050 fsess_set_notimpl(data->mp, FUSE_FALLOCATE); 1051 } 1052 1053 if (fuse_libabi_geq(data, 7, 23) && fiio->time_gran >= 1 && 1054 fiio->time_gran <= 1000000000) 1055 data->time_gran = fiio->time_gran; 1056 else 1057 data->time_gran = 1; 1058 1059 if (!fuse_libabi_geq(data, 7, 23)) 1060 data->cache_mode = fuse_data_cache_mode; 1061 else if (fiio->flags & FUSE_WRITEBACK_CACHE) 1062 data->cache_mode = FUSE_CACHE_WB; 1063 else 1064 data->cache_mode = FUSE_CACHE_WT; 1065 1066 if (!fuse_libabi_geq(data, 7, 24)) 1067 fsess_set_notimpl(data->mp, FUSE_LSEEK); 1068 1069 if (!fuse_libabi_geq(data, 7, 28)) 1070 fsess_set_notimpl(data->mp, FUSE_COPY_FILE_RANGE); 1071 1072 if (fuse_libabi_geq(data, 7, 33) && (fiio->flags & FUSE_SETXATTR_EXT)) 1073 data->dataflags |= FSESS_SETXATTR_EXT; 1074 out: 1075 if (err) { 1076 fdata_set_dead(data); 1077 } 1078 FUSE_LOCK(); 1079 data->dataflags |= FSESS_INITED; 1080 SDT_PROBE2(fusefs, , internal, init_done, data, fiio); 1081 wakeup(&data->ticketer); 1082 FUSE_UNLOCK(); 1083 1084 return 0; 1085 } 1086 1087 void 1088 fuse_internal_send_init(struct fuse_data *data, struct thread *td) 1089 { 1090 struct fuse_init_in *fiii; 1091 struct fuse_dispatcher fdi; 1092 1093 fdisp_init(&fdi, sizeof(*fiii)); 1094 fdisp_make(&fdi, FUSE_INIT, data->mp, 0, td, NULL); 1095 fiii = fdi.indata; 1096 fiii->major = FUSE_KERNEL_VERSION; 1097 fiii->minor = FUSE_KERNEL_MINOR_VERSION; 1098 /* 1099 * fusefs currently reads ahead no more than one cache block at a time. 1100 * See fuse_read_biobackend 1101 */ 1102 fiii->max_readahead = maxbcachebuf; 1103 /* 1104 * Unsupported features: 1105 * FUSE_FILE_OPS: No known FUSE server or client supports it 1106 * FUSE_ATOMIC_O_TRUNC: our VFS cannot support it 1107 * FUSE_DONT_MASK: unlike Linux, FreeBSD always applies the umask, even 1108 * when default ACLs are in use. 1109 * FUSE_SPLICE_WRITE, FUSE_SPLICE_MOVE, FUSE_SPLICE_READ: FreeBSD 1110 * doesn't have splice(2). 1111 * FUSE_FLOCK_LOCKS: not yet implemented 1112 * FUSE_AUTO_INVAL_DATA: not yet implemented 1113 * FUSE_DO_READDIRPLUS: not yet implemented 1114 * FUSE_READDIRPLUS_AUTO: not yet implemented 1115 * FUSE_ASYNC_DIO: not yet implemented 1116 * FUSE_PARALLEL_DIROPS: not yet implemented 1117 * FUSE_HANDLE_KILLPRIV: not yet implemented 1118 * FUSE_POSIX_ACL: not yet implemented 1119 * FUSE_ABORT_ERROR: not yet implemented 1120 * FUSE_CACHE_SYMLINKS: not yet implemented 1121 * FUSE_MAX_PAGES: not yet implemented 1122 */ 1123 fiii->flags = FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_EXPORT_SUPPORT 1124 | FUSE_BIG_WRITES | FUSE_HAS_IOCTL_DIR | FUSE_WRITEBACK_CACHE 1125 | FUSE_NO_OPEN_SUPPORT | FUSE_NO_OPENDIR_SUPPORT 1126 | FUSE_SETXATTR_EXT; 1127 1128 fuse_insert_callback(fdi.tick, fuse_internal_init_callback); 1129 fuse_insert_message(fdi.tick, false); 1130 fdisp_destroy(&fdi); 1131 } 1132 1133 /* 1134 * Send a FUSE_SETATTR operation with no permissions checks. If cred is NULL, 1135 * send the request with root credentials 1136 */ 1137 int fuse_internal_setattr(struct vnode *vp, struct vattr *vap, 1138 struct thread *td, struct ucred *cred) 1139 { 1140 struct fuse_vnode_data *fvdat; 1141 struct fuse_dispatcher fdi; 1142 struct fuse_setattr_in *fsai; 1143 struct mount *mp; 1144 pid_t pid = td->td_proc->p_pid; 1145 struct fuse_data *data; 1146 int err = 0; 1147 __enum_uint8(vtype) vtyp; 1148 1149 ASSERT_CACHED_ATTRS_LOCKED(vp); 1150 1151 mp = vnode_mount(vp); 1152 fvdat = VTOFUD(vp); 1153 data = fuse_get_mpdata(mp); 1154 1155 fdisp_init(&fdi, sizeof(*fsai)); 1156 fdisp_make_vp(&fdi, FUSE_SETATTR, vp, td, cred); 1157 if (!cred) { 1158 fdi.finh->uid = 0; 1159 fdi.finh->gid = 0; 1160 } 1161 fsai = fdi.indata; 1162 fsai->valid = 0; 1163 1164 if (vap->va_uid != (uid_t)VNOVAL) { 1165 fsai->uid = vap->va_uid; 1166 fsai->valid |= FATTR_UID; 1167 } 1168 if (vap->va_gid != (gid_t)VNOVAL) { 1169 fsai->gid = vap->va_gid; 1170 fsai->valid |= FATTR_GID; 1171 } 1172 if (vap->va_size != VNOVAL) { 1173 struct fuse_filehandle *fufh = NULL; 1174 1175 /*Truncate to a new value. */ 1176 fsai->size = vap->va_size; 1177 fsai->valid |= FATTR_SIZE; 1178 1179 fuse_filehandle_getrw(vp, FWRITE, &fufh, cred, pid); 1180 if (fufh) { 1181 fsai->fh = fufh->fh_id; 1182 fsai->valid |= FATTR_FH; 1183 } 1184 VTOFUD(vp)->flag &= ~FN_SIZECHANGE; 1185 } 1186 if (vap->va_atime.tv_sec != VNOVAL) { 1187 fsai->atime = vap->va_atime.tv_sec; 1188 fsai->atimensec = vap->va_atime.tv_nsec; 1189 fsai->valid |= FATTR_ATIME; 1190 if (vap->va_vaflags & VA_UTIMES_NULL) 1191 fsai->valid |= FATTR_ATIME_NOW; 1192 } else if (fvdat->flag & FN_ATIMECHANGE) { 1193 fsai->atime = fvdat->cached_attrs.va_atime.tv_sec; 1194 fsai->atimensec = fvdat->cached_attrs.va_atime.tv_nsec; 1195 fsai->valid |= FATTR_ATIME; 1196 } 1197 if (vap->va_mtime.tv_sec != VNOVAL) { 1198 fsai->mtime = vap->va_mtime.tv_sec; 1199 fsai->mtimensec = vap->va_mtime.tv_nsec; 1200 fsai->valid |= FATTR_MTIME; 1201 if (vap->va_vaflags & VA_UTIMES_NULL) 1202 fsai->valid |= FATTR_MTIME_NOW; 1203 } else if (fvdat->flag & FN_MTIMECHANGE) { 1204 fsai->mtime = fvdat->cached_attrs.va_mtime.tv_sec; 1205 fsai->mtimensec = fvdat->cached_attrs.va_mtime.tv_nsec; 1206 fsai->valid |= FATTR_MTIME; 1207 } 1208 if (fuse_libabi_geq(data, 7, 23) && fvdat->flag & FN_CTIMECHANGE) { 1209 fsai->ctime = fvdat->cached_attrs.va_ctime.tv_sec; 1210 fsai->ctimensec = fvdat->cached_attrs.va_ctime.tv_nsec; 1211 fsai->valid |= FATTR_CTIME; 1212 } 1213 if (vap->va_mode != (mode_t)VNOVAL) { 1214 fsai->mode = vap->va_mode & ALLPERMS; 1215 fsai->valid |= FATTR_MODE; 1216 } 1217 if (!fsai->valid) { 1218 goto out; 1219 } 1220 1221 if ((err = fdisp_wait_answ(&fdi))) 1222 goto out; 1223 vtyp = IFTOVT(((struct fuse_attr_out *)fdi.answ)->attr.mode); 1224 1225 if (vnode_vtype(vp) != vtyp) { 1226 if (vnode_vtype(vp) == VNON && vtyp != VNON) { 1227 SDT_PROBE2(fusefs, , internal, trace, 1, "FUSE: Dang! " 1228 "vnode_vtype is VNON and vtype isn't."); 1229 } else { 1230 /* 1231 * STALE vnode, ditch 1232 * 1233 * The vnode has changed its type "behind our back". 1234 * This probably means that the file got deleted and 1235 * recreated on the server, with the same inode. 1236 * There's nothing really we can do, so let us just 1237 * return ENOENT. After all, the entry must not have 1238 * existed in the recent past. If the user tries 1239 * again, it will work. 1240 */ 1241 fuse_internal_vnode_disappear(vp); 1242 err = ENOENT; 1243 } 1244 } 1245 if (err == 0) { 1246 struct fuse_attr_out *fao = (struct fuse_attr_out*)fdi.answ; 1247 fuse_vnode_undirty_cached_timestamps(vp, true); 1248 fuse_internal_cache_attrs(vp, &fao->attr, fao->attr_valid, 1249 fao->attr_valid_nsec, NULL, false); 1250 getnanouptime(&fvdat->last_local_modify); 1251 } 1252 1253 out: 1254 fdisp_destroy(&fdi); 1255 return err; 1256 } 1257 1258 /* 1259 * FreeBSD clears the SUID and SGID bits on any write by a non-root user. 1260 */ 1261 void 1262 fuse_internal_clear_suid_on_write(struct vnode *vp, struct ucred *cred, 1263 struct thread *td) 1264 { 1265 struct fuse_data *data; 1266 struct mount *mp; 1267 struct vattr va; 1268 int dataflags; 1269 1270 mp = vnode_mount(vp); 1271 data = fuse_get_mpdata(mp); 1272 dataflags = data->dataflags; 1273 1274 ASSERT_VOP_LOCKED(vp, __func__); 1275 1276 if (dataflags & FSESS_DEFAULT_PERMISSIONS) { 1277 if (priv_check_cred(cred, PRIV_VFS_RETAINSUGID)) { 1278 fuse_internal_getattr(vp, &va, cred, td); 1279 if (va.va_mode & (S_ISUID | S_ISGID)) { 1280 mode_t mode = va.va_mode & ~(S_ISUID | S_ISGID); 1281 /* Clear all vattr fields except mode */ 1282 vattr_null(&va); 1283 va.va_mode = mode; 1284 1285 /* 1286 * Ignore fuse_internal_setattr's return value, 1287 * because at this point the write operation has 1288 * already succeeded and we don't want to return 1289 * failing status for that. 1290 */ 1291 (void)fuse_internal_setattr(vp, &va, td, NULL); 1292 } 1293 } 1294 } 1295 } 1296 1297 #ifdef ZERO_PAD_INCOMPLETE_BUFS 1298 static int 1299 isbzero(void *buf, size_t len) 1300 { 1301 int i; 1302 1303 for (i = 0; i < len; i++) { 1304 if (((char *)buf)[i]) 1305 return (0); 1306 } 1307 1308 return (1); 1309 } 1310 1311 #endif 1312 1313 void 1314 fuse_internal_init(void) 1315 { 1316 fuse_lookup_cache_misses = counter_u64_alloc(M_WAITOK); 1317 fuse_lookup_cache_hits = counter_u64_alloc(M_WAITOK); 1318 } 1319 1320 void 1321 fuse_internal_destroy(void) 1322 { 1323 counter_u64_free(fuse_lookup_cache_hits); 1324 counter_u64_free(fuse_lookup_cache_misses); 1325 } 1326