Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/fs/fuse/fuse_internal.c
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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/cdefs.h> 64 __FBSDID("$FreeBSD$"); 65 66 #include <sys/param.h> 67 #include <sys/systm.h> 68 #include <sys/counter.h> 69 #include <sys/module.h> 70 #include <sys/errno.h> 71 #include <sys/kernel.h> 72 #include <sys/conf.h> 73 #include <sys/uio.h> 74 #include <sys/malloc.h> 75 #include <sys/queue.h> 76 #include <sys/lock.h> 77 #include <sys/mutex.h> 78 #include <sys/sdt.h> 79 #include <sys/sx.h> 80 #include <sys/proc.h> 81 #include <sys/mount.h> 82 #include <sys/vnode.h> 83 #include <sys/namei.h> 84 #include <sys/stat.h> 85 #include <sys/unistd.h> 86 #include <sys/filedesc.h> 87 #include <sys/file.h> 88 #include <sys/fcntl.h> 89 #include <sys/dirent.h> 90 #include <sys/bio.h> 91 #include <sys/buf.h> 92 #include <sys/sysctl.h> 93 #include <sys/priv.h> 94 95 #include "fuse.h" 96 #include "fuse_file.h" 97 #include "fuse_internal.h" 98 #include "fuse_io.h" 99 #include "fuse_ipc.h" 100 #include "fuse_node.h" 101 #include "fuse_file.h" 102 103 SDT_PROVIDER_DECLARE(fusefs); 104 /* 105 * Fuse trace probe: 106 * arg0: verbosity. Higher numbers give more verbose messages 107 * arg1: Textual message 108 */ 109 SDT_PROBE_DEFINE2(fusefs, , internal, trace, "int", "char*"); 110 111 #ifdef ZERO_PAD_INCOMPLETE_BUFS 112 static int isbzero(void *buf, size_t len); 113 114 #endif 115 116 counter_u64_t fuse_lookup_cache_hits; 117 counter_u64_t fuse_lookup_cache_misses; 118 119 SYSCTL_COUNTER_U64(_vfs_fusefs_stats, OID_AUTO, lookup_cache_hits, CTLFLAG_RD, 120 &fuse_lookup_cache_hits, "number of positive cache hits in lookup"); 121 122 SYSCTL_COUNTER_U64(_vfs_fusefs_stats, OID_AUTO, lookup_cache_misses, CTLFLAG_RD, 123 &fuse_lookup_cache_misses, "number of cache misses in lookup"); 124 125 int 126 fuse_internal_get_cached_vnode(struct mount* mp, ino_t ino, int flags, 127 struct vnode **vpp) 128 { 129 struct bintime now; 130 struct thread *td = curthread; 131 uint64_t nodeid = ino; 132 int error; 133 134 *vpp = NULL; 135 136 error = vfs_hash_get(mp, fuse_vnode_hash(nodeid), flags, td, vpp, 137 fuse_vnode_cmp, &nodeid); 138 if (error) 139 return error; 140 /* 141 * Check the entry cache timeout. We have to do this within fusefs 142 * instead of by using cache_enter_time/cache_lookup because those 143 * routines are only intended to work with pathnames, not inodes 144 */ 145 if (*vpp != NULL) { 146 getbinuptime(&now); 147 if (bintime_cmp(&(VTOFUD(*vpp)->entry_cache_timeout), &now, >)){ 148 counter_u64_add(fuse_lookup_cache_hits, 1); 149 return 0; 150 } else { 151 /* Entry cache timeout */ 152 counter_u64_add(fuse_lookup_cache_misses, 1); 153 cache_purge(*vpp); 154 vput(*vpp); 155 *vpp = NULL; 156 } 157 } 158 return 0; 159 } 160 161 SDT_PROBE_DEFINE0(fusefs, , internal, access_vadmin); 162 /* Synchronously send a FUSE_ACCESS operation */ 163 int 164 fuse_internal_access(struct vnode *vp, 165 accmode_t mode, 166 struct thread *td, 167 struct ucred *cred) 168 { 169 int err = 0; 170 uint32_t mask = F_OK; 171 int dataflags; 172 struct mount *mp; 173 struct fuse_dispatcher fdi; 174 struct fuse_access_in *fai; 175 struct fuse_data *data; 176 177 mp = vnode_mount(vp); 178 179 data = fuse_get_mpdata(mp); 180 dataflags = data->dataflags; 181 182 if (mode == 0) 183 return 0; 184 185 if (mode & VMODIFY_PERMS && vfs_isrdonly(mp)) { 186 switch (vp->v_type) { 187 case VDIR: 188 /* FALLTHROUGH */ 189 case VLNK: 190 /* FALLTHROUGH */ 191 case VREG: 192 return EROFS; 193 default: 194 break; 195 } 196 } 197 198 /* Unless explicitly permitted, deny everyone except the fs owner. */ 199 if (!(dataflags & FSESS_DAEMON_CAN_SPY)) { 200 if (fuse_match_cred(data->daemoncred, cred)) 201 return EPERM; 202 } 203 204 if (dataflags & FSESS_DEFAULT_PERMISSIONS) { 205 struct vattr va; 206 207 fuse_internal_getattr(vp, &va, cred, td); 208 return vaccess(vp->v_type, va.va_mode, va.va_uid, 209 va.va_gid, mode, cred); 210 } 211 212 if (mode & VADMIN) { 213 /* 214 * The FUSE protocol doesn't have an equivalent of VADMIN, so 215 * it's a bug if we ever reach this point with that bit set. 216 */ 217 SDT_PROBE0(fusefs, , internal, access_vadmin); 218 } 219 220 if (fsess_not_impl(mp, FUSE_ACCESS)) 221 return 0; 222 223 if ((mode & (VWRITE | VAPPEND)) != 0) 224 mask |= W_OK; 225 if ((mode & VREAD) != 0) 226 mask |= R_OK; 227 if ((mode & VEXEC) != 0) 228 mask |= X_OK; 229 230 fdisp_init(&fdi, sizeof(*fai)); 231 fdisp_make_vp(&fdi, FUSE_ACCESS, vp, td, cred); 232 233 fai = fdi.indata; 234 fai->mask = mask; 235 236 err = fdisp_wait_answ(&fdi); 237 fdisp_destroy(&fdi); 238 239 if (err == ENOSYS) { 240 fsess_set_notimpl(mp, FUSE_ACCESS); 241 err = 0; 242 } 243 return err; 244 } 245 246 /* 247 * Cache FUSE attributes from attr, in attribute cache associated with vnode 248 * 'vp'. Optionally, if argument 'vap' is not NULL, store a copy of the 249 * converted attributes there as well. 250 * 251 * If the nominal attribute cache TTL is zero, do not cache on the 'vp' (but do 252 * return the result to the caller). 253 */ 254 void 255 fuse_internal_cache_attrs(struct vnode *vp, struct fuse_attr *attr, 256 uint64_t attr_valid, uint32_t attr_valid_nsec, struct vattr *vap, 257 bool from_server) 258 { 259 struct mount *mp; 260 struct fuse_vnode_data *fvdat; 261 struct fuse_data *data; 262 struct vattr *vp_cache_at; 263 264 mp = vnode_mount(vp); 265 fvdat = VTOFUD(vp); 266 data = fuse_get_mpdata(mp); 267 268 ASSERT_VOP_ELOCKED(vp, "fuse_internal_cache_attrs"); 269 270 fuse_validity_2_bintime(attr_valid, attr_valid_nsec, 271 &fvdat->attr_cache_timeout); 272 273 if (vnode_isreg(vp) && 274 fvdat->cached_attrs.va_size != VNOVAL && 275 attr->size != fvdat->cached_attrs.va_size) 276 { 277 if ( data->cache_mode == FUSE_CACHE_WB && 278 fvdat->flag & FN_SIZECHANGE) 279 { 280 const char *msg; 281 282 /* 283 * The server changed the file's size even though we're 284 * using writeback cacheing and and we have outstanding 285 * dirty writes! That's a server bug. 286 */ 287 if (fuse_libabi_geq(data, 7, 23)) { 288 msg = "writeback cache incoherent!." 289 "To prevent data corruption, disable " 290 "the writeback cache according to your " 291 "FUSE server's documentation."; 292 } else { 293 msg = "writeback cache incoherent!." 294 "To prevent data corruption, disable " 295 "the writeback cache by setting " 296 "vfs.fusefs.data_cache_mode to 0 or 1."; 297 } 298 fuse_warn(data, FSESS_WARN_WB_CACHE_INCOHERENT, msg); 299 } 300 if (fuse_vnode_attr_cache_valid(vp) && 301 data->cache_mode != FUSE_CACHE_UC) 302 { 303 /* 304 * The server changed the file's size even though we 305 * have it cached and our cache has not yet expired. 306 * That's a bug. 307 */ 308 fuse_warn(data, FSESS_WARN_CACHE_INCOHERENT, 309 "cache incoherent! " 310 "To prevent " 311 "data corruption, disable the data cache " 312 "by mounting with -o direct_io, or as " 313 "directed otherwise by your FUSE server's " 314 "documentation."); 315 } 316 } 317 318 /* Fix our buffers if the filesize changed without us knowing */ 319 if (vnode_isreg(vp) && attr->size != fvdat->cached_attrs.va_size) { 320 (void)fuse_vnode_setsize(vp, attr->size, from_server); 321 fvdat->cached_attrs.va_size = attr->size; 322 } 323 324 if (attr_valid > 0 || attr_valid_nsec > 0) 325 vp_cache_at = &(fvdat->cached_attrs); 326 else if (vap != NULL) 327 vp_cache_at = vap; 328 else 329 return; 330 331 vattr_null(vp_cache_at); 332 vp_cache_at->va_fsid = mp->mnt_stat.f_fsid.val[0]; 333 vp_cache_at->va_fileid = attr->ino; 334 vp_cache_at->va_mode = attr->mode & ~S_IFMT; 335 vp_cache_at->va_nlink = attr->nlink; 336 vp_cache_at->va_uid = attr->uid; 337 vp_cache_at->va_gid = attr->gid; 338 vp_cache_at->va_rdev = attr->rdev; 339 vp_cache_at->va_size = attr->size; 340 /* XXX on i386, seconds are truncated to 32 bits */ 341 vp_cache_at->va_atime.tv_sec = attr->atime; 342 vp_cache_at->va_atime.tv_nsec = attr->atimensec; 343 vp_cache_at->va_mtime.tv_sec = attr->mtime; 344 vp_cache_at->va_mtime.tv_nsec = attr->mtimensec; 345 vp_cache_at->va_ctime.tv_sec = attr->ctime; 346 vp_cache_at->va_ctime.tv_nsec = attr->ctimensec; 347 if (fuse_libabi_geq(data, 7, 9) && attr->blksize > 0) 348 vp_cache_at->va_blocksize = attr->blksize; 349 else 350 vp_cache_at->va_blocksize = PAGE_SIZE; 351 vp_cache_at->va_type = IFTOVT(attr->mode); 352 vp_cache_at->va_bytes = attr->blocks * S_BLKSIZE; 353 vp_cache_at->va_flags = 0; 354 355 if (vap != vp_cache_at && vap != NULL) 356 memcpy(vap, vp_cache_at, sizeof(*vap)); 357 } 358 359 /* fsync */ 360 361 int 362 fuse_internal_fsync_callback(struct fuse_ticket *tick, struct uio *uio) 363 { 364 if (tick->tk_aw_ohead.error == ENOSYS) { 365 fsess_set_notimpl(tick->tk_data->mp, fticket_opcode(tick)); 366 } 367 return 0; 368 } 369 370 int 371 fuse_internal_fsync(struct vnode *vp, 372 struct thread *td, 373 int waitfor, 374 bool datasync) 375 { 376 struct fuse_fsync_in *ffsi = NULL; 377 struct fuse_dispatcher fdi; 378 struct fuse_filehandle *fufh; 379 struct fuse_vnode_data *fvdat = VTOFUD(vp); 380 struct mount *mp = vnode_mount(vp); 381 int op = FUSE_FSYNC; 382 int err = 0; 383 384 if (fsess_not_impl(vnode_mount(vp), 385 (vnode_vtype(vp) == VDIR ? FUSE_FSYNCDIR : FUSE_FSYNC))) { 386 return 0; 387 } 388 if (vnode_isdir(vp)) 389 op = FUSE_FSYNCDIR; 390 391 if (fsess_not_impl(mp, op)) 392 return 0; 393 394 fdisp_init(&fdi, sizeof(*ffsi)); 395 /* 396 * fsync every open file handle for this file, because we can't be sure 397 * which file handle the caller is really referring to. 398 */ 399 LIST_FOREACH(fufh, &fvdat->handles, next) { 400 fdi.iosize = sizeof(*ffsi); 401 if (ffsi == NULL) 402 fdisp_make_vp(&fdi, op, vp, td, NULL); 403 else 404 fdisp_refresh_vp(&fdi, op, vp, td, NULL); 405 ffsi = fdi.indata; 406 ffsi->fh = fufh->fh_id; 407 ffsi->fsync_flags = 0; 408 409 if (datasync) 410 ffsi->fsync_flags = FUSE_FSYNC_FDATASYNC; 411 412 if (waitfor == MNT_WAIT) { 413 err = fdisp_wait_answ(&fdi); 414 } else { 415 fuse_insert_callback(fdi.tick, 416 fuse_internal_fsync_callback); 417 fuse_insert_message(fdi.tick, false); 418 } 419 if (err == ENOSYS) { 420 /* ENOSYS means "success, and don't call again" */ 421 fsess_set_notimpl(mp, op); 422 err = 0; 423 break; 424 } 425 } 426 fdisp_destroy(&fdi); 427 428 return err; 429 } 430 431 /* Asynchronous invalidation */ 432 SDT_PROBE_DEFINE3(fusefs, , internal, invalidate_entry, 433 "struct vnode*", "struct fuse_notify_inval_entry_out*", "char*"); 434 int 435 fuse_internal_invalidate_entry(struct mount *mp, struct uio *uio) 436 { 437 struct fuse_notify_inval_entry_out fnieo; 438 struct componentname cn; 439 struct vnode *dvp, *vp; 440 char name[PATH_MAX]; 441 int err; 442 443 if ((err = uiomove(&fnieo, sizeof(fnieo), uio)) != 0) 444 return (err); 445 446 if (fnieo.namelen >= sizeof(name)) 447 return (EINVAL); 448 449 if ((err = uiomove(name, fnieo.namelen, uio)) != 0) 450 return (err); 451 name[fnieo.namelen] = '\0'; 452 /* fusefs does not cache "." or ".." entries */ 453 if (strncmp(name, ".", sizeof(".")) == 0 || 454 strncmp(name, "..", sizeof("..")) == 0) 455 return (0); 456 457 if (fnieo.parent == FUSE_ROOT_ID) 458 err = VFS_ROOT(mp, LK_SHARED, &dvp); 459 else 460 err = fuse_internal_get_cached_vnode( mp, fnieo.parent, 461 LK_SHARED, &dvp); 462 SDT_PROBE3(fusefs, , internal, invalidate_entry, dvp, &fnieo, name); 463 /* 464 * If dvp is not in the cache, then it must've been reclaimed. And 465 * since fuse_vnop_reclaim does a cache_purge, name's entry must've 466 * been invalidated already. So we can safely return if dvp == NULL 467 */ 468 if (err != 0 || dvp == NULL) 469 return (err); 470 /* 471 * XXX we can't check dvp's generation because the FUSE invalidate 472 * entry message doesn't include it. Worse case is that we invalidate 473 * an entry that didn't need to be invalidated. 474 */ 475 476 cn.cn_nameiop = LOOKUP; 477 cn.cn_flags = 0; /* !MAKEENTRY means free cached entry */ 478 cn.cn_cred = curthread->td_ucred; 479 cn.cn_lkflags = LK_SHARED; 480 cn.cn_pnbuf = NULL; 481 cn.cn_nameptr = name; 482 cn.cn_namelen = fnieo.namelen; 483 err = cache_lookup(dvp, &vp, &cn, NULL, NULL); 484 MPASS(err == 0); 485 fuse_vnode_clear_attr_cache(dvp); 486 vput(dvp); 487 return (0); 488 } 489 490 SDT_PROBE_DEFINE2(fusefs, , internal, invalidate_inode, 491 "struct vnode*", "struct fuse_notify_inval_inode_out *"); 492 int 493 fuse_internal_invalidate_inode(struct mount *mp, struct uio *uio) 494 { 495 struct fuse_notify_inval_inode_out fniio; 496 struct vnode *vp; 497 int err; 498 499 if ((err = uiomove(&fniio, sizeof(fniio), uio)) != 0) 500 return (err); 501 502 if (fniio.ino == FUSE_ROOT_ID) 503 err = VFS_ROOT(mp, LK_EXCLUSIVE, &vp); 504 else 505 err = fuse_internal_get_cached_vnode(mp, fniio.ino, LK_SHARED, 506 &vp); 507 SDT_PROBE2(fusefs, , internal, invalidate_inode, vp, &fniio); 508 if (err != 0 || vp == NULL) 509 return (err); 510 /* 511 * XXX we can't check vp's generation because the FUSE invalidate 512 * entry message doesn't include it. Worse case is that we invalidate 513 * an inode that didn't need to be invalidated. 514 */ 515 516 /* 517 * Flush and invalidate buffers if off >= 0. Technically we only need 518 * to flush and invalidate the range of offsets [off, off + len), but 519 * for simplicity's sake we do everything. 520 */ 521 if (fniio.off >= 0) 522 fuse_io_invalbuf(vp, curthread); 523 fuse_vnode_clear_attr_cache(vp); 524 vput(vp); 525 return (0); 526 } 527 528 /* mknod */ 529 int 530 fuse_internal_mknod(struct vnode *dvp, struct vnode **vpp, 531 struct componentname *cnp, struct vattr *vap) 532 { 533 struct fuse_data *data; 534 struct fuse_mknod_in fmni; 535 size_t insize; 536 537 data = fuse_get_mpdata(dvp->v_mount); 538 539 fmni.mode = MAKEIMODE(vap->va_type, vap->va_mode); 540 fmni.rdev = vap->va_rdev; 541 if (fuse_libabi_geq(data, 7, 12)) { 542 insize = sizeof(fmni); 543 fmni.umask = curthread->td_proc->p_pd->pd_cmask; 544 fmni.padding = 0; 545 } else { 546 insize = FUSE_COMPAT_MKNOD_IN_SIZE; 547 } 548 return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKNOD, &fmni, 549 insize, vap->va_type)); 550 } 551 552 /* readdir */ 553 554 int 555 fuse_internal_readdir(struct vnode *vp, 556 struct uio *uio, 557 struct fuse_filehandle *fufh, 558 struct fuse_iov *cookediov, 559 int *ncookies, 560 uint64_t *cookies) 561 { 562 int err = 0; 563 struct fuse_dispatcher fdi; 564 struct fuse_read_in *fri = NULL; 565 566 if (uio_resid(uio) == 0) 567 return 0; 568 fdisp_init(&fdi, 0); 569 570 /* 571 * Note that we DO NOT have a UIO_SYSSPACE here (so no need for p2p 572 * I/O). 573 */ 574 while (uio_resid(uio) > 0) { 575 fdi.iosize = sizeof(*fri); 576 fdisp_make_vp(&fdi, FUSE_READDIR, vp, NULL, NULL); 577 fri = fdi.indata; 578 fri->fh = fufh->fh_id; 579 fri->offset = uio_offset(uio); 580 fri->size = MIN(uio->uio_resid, 581 fuse_get_mpdata(vp->v_mount)->max_read); 582 583 if ((err = fdisp_wait_answ(&fdi))) 584 break; 585 if ((err = fuse_internal_readdir_processdata(uio, fri->size, 586 fdi.answ, fdi.iosize, cookediov, ncookies, &cookies))) 587 break; 588 } 589 590 fdisp_destroy(&fdi); 591 return ((err == -1) ? 0 : err); 592 } 593 594 /* 595 * Return -1 to indicate that this readdir is finished, 0 if it copied 596 * all the directory data read in and it may be possible to read more 597 * and greater than 0 for a failure. 598 */ 599 int 600 fuse_internal_readdir_processdata(struct uio *uio, 601 size_t reqsize, 602 void *buf, 603 size_t bufsize, 604 struct fuse_iov *cookediov, 605 int *ncookies, 606 uint64_t **cookiesp) 607 { 608 int err = 0; 609 int oreclen; 610 size_t freclen; 611 612 struct dirent *de; 613 struct fuse_dirent *fudge; 614 uint64_t *cookies; 615 616 cookies = *cookiesp; 617 if (bufsize < FUSE_NAME_OFFSET) 618 return -1; 619 for (;;) { 620 if (bufsize < FUSE_NAME_OFFSET) { 621 err = -1; 622 break; 623 } 624 fudge = (struct fuse_dirent *)buf; 625 freclen = FUSE_DIRENT_SIZE(fudge); 626 627 if (bufsize < freclen) { 628 /* 629 * This indicates a partial directory entry at the 630 * end of the directory data. 631 */ 632 err = -1; 633 break; 634 } 635 #ifdef ZERO_PAD_INCOMPLETE_BUFS 636 if (isbzero(buf, FUSE_NAME_OFFSET)) { 637 err = -1; 638 break; 639 } 640 #endif 641 642 if (!fudge->namelen || fudge->namelen > MAXNAMLEN) { 643 err = EINVAL; 644 break; 645 } 646 oreclen = GENERIC_DIRSIZ((struct pseudo_dirent *) 647 &fudge->namelen); 648 649 if (oreclen > uio_resid(uio)) { 650 /* Out of space for the dir so we are done. */ 651 err = -1; 652 break; 653 } 654 fiov_adjust(cookediov, oreclen); 655 bzero(cookediov->base, oreclen); 656 657 de = (struct dirent *)cookediov->base; 658 de->d_fileno = fudge->ino; 659 de->d_off = fudge->off; 660 de->d_reclen = oreclen; 661 de->d_type = fudge->type; 662 de->d_namlen = fudge->namelen; 663 memcpy((char *)cookediov->base + sizeof(struct dirent) - 664 MAXNAMLEN - 1, 665 (char *)buf + FUSE_NAME_OFFSET, fudge->namelen); 666 dirent_terminate(de); 667 668 err = uiomove(cookediov->base, cookediov->len, uio); 669 if (err) 670 break; 671 if (cookies != NULL) { 672 if (*ncookies == 0) { 673 err = -1; 674 break; 675 } 676 *cookies = fudge->off; 677 cookies++; 678 (*ncookies)--; 679 } 680 buf = (char *)buf + freclen; 681 bufsize -= freclen; 682 uio_setoffset(uio, fudge->off); 683 } 684 *cookiesp = cookies; 685 686 return err; 687 } 688 689 /* remove */ 690 691 int 692 fuse_internal_remove(struct vnode *dvp, 693 struct vnode *vp, 694 struct componentname *cnp, 695 enum fuse_opcode op) 696 { 697 struct fuse_dispatcher fdi; 698 nlink_t nlink; 699 int err = 0; 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 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 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 off_t old_filesize = fvdat->cached_attrs.va_size; 899 struct timespec old_atime = fvdat->cached_attrs.va_atime; 900 struct timespec old_ctime = fvdat->cached_attrs.va_ctime; 901 struct timespec old_mtime = fvdat->cached_attrs.va_mtime; 902 enum vtype vtyp; 903 int err; 904 905 ASSERT_VOP_LOCKED(vp, __func__); 906 907 fdisp_init(&fdi, sizeof(*fgai)); 908 fdisp_make_vp(&fdi, FUSE_GETATTR, vp, td, cred); 909 fgai = fdi.indata; 910 /* 911 * We could look up a file handle and set it in fgai->fh, but that 912 * involves extra runtime work and I'm unaware of any file systems that 913 * care. 914 */ 915 fgai->getattr_flags = 0; 916 if ((err = fdisp_wait_answ(&fdi))) { 917 if (err == ENOENT) 918 fuse_internal_vnode_disappear(vp); 919 goto out; 920 } 921 922 fao = (struct fuse_attr_out *)fdi.answ; 923 vtyp = IFTOVT(fao->attr.mode); 924 if (fvdat->flag & FN_SIZECHANGE) 925 fao->attr.size = old_filesize; 926 if (fvdat->flag & FN_ATIMECHANGE) { 927 fao->attr.atime = old_atime.tv_sec; 928 fao->attr.atimensec = old_atime.tv_nsec; 929 } 930 if (fvdat->flag & FN_CTIMECHANGE) { 931 fao->attr.ctime = old_ctime.tv_sec; 932 fao->attr.ctimensec = old_ctime.tv_nsec; 933 } 934 if (fvdat->flag & FN_MTIMECHANGE) { 935 fao->attr.mtime = old_mtime.tv_sec; 936 fao->attr.mtimensec = old_mtime.tv_nsec; 937 } 938 fuse_internal_cache_attrs(vp, &fao->attr, fao->attr_valid, 939 fao->attr_valid_nsec, vap, true); 940 if (vtyp != vnode_vtype(vp)) { 941 fuse_internal_vnode_disappear(vp); 942 err = ENOENT; 943 } 944 945 out: 946 fdisp_destroy(&fdi); 947 return err; 948 } 949 950 /* Read a vnode's attributes from cache or fetch them from the fuse daemon */ 951 int 952 fuse_internal_getattr(struct vnode *vp, struct vattr *vap, struct ucred *cred, 953 struct thread *td) 954 { 955 struct vattr *attrs; 956 957 if ((attrs = VTOVA(vp)) != NULL) { 958 *vap = *attrs; /* struct copy */ 959 return 0; 960 } 961 962 return fuse_internal_do_getattr(vp, vap, cred, td); 963 } 964 965 void 966 fuse_internal_vnode_disappear(struct vnode *vp) 967 { 968 struct fuse_vnode_data *fvdat = VTOFUD(vp); 969 970 ASSERT_VOP_ELOCKED(vp, "fuse_internal_vnode_disappear"); 971 fvdat->flag |= FN_REVOKED; 972 cache_purge(vp); 973 } 974 975 /* fuse start/stop */ 976 977 SDT_PROBE_DEFINE2(fusefs, , internal, init_done, 978 "struct fuse_data*", "struct fuse_init_out*"); 979 int 980 fuse_internal_init_callback(struct fuse_ticket *tick, struct uio *uio) 981 { 982 int err = 0; 983 struct fuse_data *data = tick->tk_data; 984 struct fuse_init_out *fiio = NULL; 985 986 if ((err = tick->tk_aw_ohead.error)) { 987 goto out; 988 } 989 if ((err = fticket_pull(tick, uio))) { 990 goto out; 991 } 992 fiio = fticket_resp(tick)->base; 993 994 data->fuse_libabi_major = fiio->major; 995 data->fuse_libabi_minor = fiio->minor; 996 if (!fuse_libabi_geq(data, 7, 4)) { 997 /* 998 * With a little work we could support servers as old as 7.1. 999 * But there would be little payoff. 1000 */ 1001 SDT_PROBE2(fusefs, , internal, trace, 1, 1002 "userpace version too low"); 1003 err = EPROTONOSUPPORT; 1004 goto out; 1005 } 1006 1007 if (fuse_libabi_geq(data, 7, 5)) { 1008 if (fticket_resp(tick)->len == sizeof(struct fuse_init_out) || 1009 fticket_resp(tick)->len == FUSE_COMPAT_22_INIT_OUT_SIZE) { 1010 data->max_write = fiio->max_write; 1011 if (fiio->flags & FUSE_ASYNC_READ) 1012 data->dataflags |= FSESS_ASYNC_READ; 1013 if (fiio->flags & FUSE_POSIX_LOCKS) 1014 data->dataflags |= FSESS_POSIX_LOCKS; 1015 if (fiio->flags & FUSE_EXPORT_SUPPORT) 1016 data->dataflags |= FSESS_EXPORT_SUPPORT; 1017 if (fiio->flags & FUSE_NO_OPEN_SUPPORT) 1018 data->dataflags |= FSESS_NO_OPEN_SUPPORT; 1019 if (fiio->flags & FUSE_NO_OPENDIR_SUPPORT) 1020 data->dataflags |= FSESS_NO_OPENDIR_SUPPORT; 1021 /* 1022 * Don't bother to check FUSE_BIG_WRITES, because it's 1023 * redundant with max_write 1024 */ 1025 /* 1026 * max_background and congestion_threshold are not 1027 * implemented 1028 */ 1029 } else { 1030 err = EINVAL; 1031 } 1032 } else { 1033 /* Old fixed values */ 1034 data->max_write = 4096; 1035 } 1036 1037 if (fuse_libabi_geq(data, 7, 6)) 1038 data->max_readahead_blocks = fiio->max_readahead / maxbcachebuf; 1039 1040 if (!fuse_libabi_geq(data, 7, 7)) 1041 fsess_set_notimpl(data->mp, FUSE_INTERRUPT); 1042 1043 if (!fuse_libabi_geq(data, 7, 8)) { 1044 fsess_set_notimpl(data->mp, FUSE_BMAP); 1045 fsess_set_notimpl(data->mp, FUSE_DESTROY); 1046 } 1047 1048 if (!fuse_libabi_geq(data, 7, 19)) { 1049 fsess_set_notimpl(data->mp, FUSE_FALLOCATE); 1050 } 1051 1052 if (fuse_libabi_geq(data, 7, 23) && fiio->time_gran >= 1 && 1053 fiio->time_gran <= 1000000000) 1054 data->time_gran = fiio->time_gran; 1055 else 1056 data->time_gran = 1; 1057 1058 if (!fuse_libabi_geq(data, 7, 23)) 1059 data->cache_mode = fuse_data_cache_mode; 1060 else if (fiio->flags & FUSE_WRITEBACK_CACHE) 1061 data->cache_mode = FUSE_CACHE_WB; 1062 else 1063 data->cache_mode = FUSE_CACHE_WT; 1064 1065 if (!fuse_libabi_geq(data, 7, 24)) 1066 fsess_set_notimpl(data->mp, FUSE_LSEEK); 1067 1068 if (!fuse_libabi_geq(data, 7, 28)) 1069 fsess_set_notimpl(data->mp, FUSE_COPY_FILE_RANGE); 1070 1071 out: 1072 if (err) { 1073 fdata_set_dead(data); 1074 } 1075 FUSE_LOCK(); 1076 data->dataflags |= FSESS_INITED; 1077 SDT_PROBE2(fusefs, , internal, init_done, data, fiio); 1078 wakeup(&data->ticketer); 1079 FUSE_UNLOCK(); 1080 1081 return 0; 1082 } 1083 1084 void 1085 fuse_internal_send_init(struct fuse_data *data, struct thread *td) 1086 { 1087 struct fuse_init_in *fiii; 1088 struct fuse_dispatcher fdi; 1089 1090 fdisp_init(&fdi, sizeof(*fiii)); 1091 fdisp_make(&fdi, FUSE_INIT, data->mp, 0, td, NULL); 1092 fiii = fdi.indata; 1093 fiii->major = FUSE_KERNEL_VERSION; 1094 fiii->minor = FUSE_KERNEL_MINOR_VERSION; 1095 /* 1096 * fusefs currently reads ahead no more than one cache block at a time. 1097 * See fuse_read_biobackend 1098 */ 1099 fiii->max_readahead = maxbcachebuf; 1100 /* 1101 * Unsupported features: 1102 * FUSE_FILE_OPS: No known FUSE server or client supports it 1103 * FUSE_ATOMIC_O_TRUNC: our VFS cannot support it 1104 * FUSE_DONT_MASK: unlike Linux, FreeBSD always applies the umask, even 1105 * when default ACLs are in use. 1106 * FUSE_SPLICE_WRITE, FUSE_SPLICE_MOVE, FUSE_SPLICE_READ: FreeBSD 1107 * doesn't have splice(2). 1108 * FUSE_FLOCK_LOCKS: not yet implemented 1109 * FUSE_HAS_IOCTL_DIR: not yet implemented 1110 * FUSE_AUTO_INVAL_DATA: not yet implemented 1111 * FUSE_DO_READDIRPLUS: not yet implemented 1112 * FUSE_READDIRPLUS_AUTO: not yet implemented 1113 * FUSE_ASYNC_DIO: not yet implemented 1114 * FUSE_PARALLEL_DIROPS: not yet implemented 1115 * FUSE_HANDLE_KILLPRIV: not yet implemented 1116 * FUSE_POSIX_ACL: not yet implemented 1117 * FUSE_ABORT_ERROR: not yet implemented 1118 * FUSE_CACHE_SYMLINKS: not yet implemented 1119 * FUSE_MAX_PAGES: not yet implemented 1120 */ 1121 fiii->flags = FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_EXPORT_SUPPORT 1122 | FUSE_BIG_WRITES | FUSE_WRITEBACK_CACHE 1123 | FUSE_NO_OPEN_SUPPORT | FUSE_NO_OPENDIR_SUPPORT; 1124 1125 fuse_insert_callback(fdi.tick, fuse_internal_init_callback); 1126 fuse_insert_message(fdi.tick, false); 1127 fdisp_destroy(&fdi); 1128 } 1129 1130 /* 1131 * Send a FUSE_SETATTR operation with no permissions checks. If cred is NULL, 1132 * send the request with root credentials 1133 */ 1134 int fuse_internal_setattr(struct vnode *vp, struct vattr *vap, 1135 struct thread *td, struct ucred *cred) 1136 { 1137 struct fuse_vnode_data *fvdat; 1138 struct fuse_dispatcher fdi; 1139 struct fuse_setattr_in *fsai; 1140 struct mount *mp; 1141 pid_t pid = td->td_proc->p_pid; 1142 struct fuse_data *data; 1143 int err = 0; 1144 enum vtype vtyp; 1145 1146 ASSERT_VOP_ELOCKED(vp, __func__); 1147 1148 mp = vnode_mount(vp); 1149 fvdat = VTOFUD(vp); 1150 data = fuse_get_mpdata(mp); 1151 1152 fdisp_init(&fdi, sizeof(*fsai)); 1153 fdisp_make_vp(&fdi, FUSE_SETATTR, vp, td, cred); 1154 if (!cred) { 1155 fdi.finh->uid = 0; 1156 fdi.finh->gid = 0; 1157 } 1158 fsai = fdi.indata; 1159 fsai->valid = 0; 1160 1161 if (vap->va_uid != (uid_t)VNOVAL) { 1162 fsai->uid = vap->va_uid; 1163 fsai->valid |= FATTR_UID; 1164 } 1165 if (vap->va_gid != (gid_t)VNOVAL) { 1166 fsai->gid = vap->va_gid; 1167 fsai->valid |= FATTR_GID; 1168 } 1169 if (vap->va_size != VNOVAL) { 1170 struct fuse_filehandle *fufh = NULL; 1171 1172 /*Truncate to a new value. */ 1173 fsai->size = vap->va_size; 1174 fsai->valid |= FATTR_SIZE; 1175 1176 fuse_filehandle_getrw(vp, FWRITE, &fufh, cred, pid); 1177 if (fufh) { 1178 fsai->fh = fufh->fh_id; 1179 fsai->valid |= FATTR_FH; 1180 } 1181 VTOFUD(vp)->flag &= ~FN_SIZECHANGE; 1182 } 1183 if (vap->va_atime.tv_sec != VNOVAL) { 1184 fsai->atime = vap->va_atime.tv_sec; 1185 fsai->atimensec = vap->va_atime.tv_nsec; 1186 fsai->valid |= FATTR_ATIME; 1187 if (vap->va_vaflags & VA_UTIMES_NULL) 1188 fsai->valid |= FATTR_ATIME_NOW; 1189 } else if (fvdat->flag & FN_ATIMECHANGE) { 1190 fsai->atime = fvdat->cached_attrs.va_atime.tv_sec; 1191 fsai->atimensec = fvdat->cached_attrs.va_atime.tv_nsec; 1192 fsai->valid |= FATTR_ATIME; 1193 } 1194 if (vap->va_mtime.tv_sec != VNOVAL) { 1195 fsai->mtime = vap->va_mtime.tv_sec; 1196 fsai->mtimensec = vap->va_mtime.tv_nsec; 1197 fsai->valid |= FATTR_MTIME; 1198 if (vap->va_vaflags & VA_UTIMES_NULL) 1199 fsai->valid |= FATTR_MTIME_NOW; 1200 } else if (fvdat->flag & FN_MTIMECHANGE) { 1201 fsai->mtime = fvdat->cached_attrs.va_mtime.tv_sec; 1202 fsai->mtimensec = fvdat->cached_attrs.va_mtime.tv_nsec; 1203 fsai->valid |= FATTR_MTIME; 1204 } 1205 if (fuse_libabi_geq(data, 7, 23) && fvdat->flag & FN_CTIMECHANGE) { 1206 fsai->ctime = fvdat->cached_attrs.va_ctime.tv_sec; 1207 fsai->ctimensec = fvdat->cached_attrs.va_ctime.tv_nsec; 1208 fsai->valid |= FATTR_CTIME; 1209 } 1210 if (vap->va_mode != (mode_t)VNOVAL) { 1211 fsai->mode = vap->va_mode & ALLPERMS; 1212 fsai->valid |= FATTR_MODE; 1213 } 1214 if (!fsai->valid) { 1215 goto out; 1216 } 1217 1218 if ((err = fdisp_wait_answ(&fdi))) 1219 goto out; 1220 vtyp = IFTOVT(((struct fuse_attr_out *)fdi.answ)->attr.mode); 1221 1222 if (vnode_vtype(vp) != vtyp) { 1223 if (vnode_vtype(vp) == VNON && vtyp != VNON) { 1224 SDT_PROBE2(fusefs, , internal, trace, 1, "FUSE: Dang! " 1225 "vnode_vtype is VNON and vtype isn't."); 1226 } else { 1227 /* 1228 * STALE vnode, ditch 1229 * 1230 * The vnode has changed its type "behind our back". 1231 * This probably means that the file got deleted and 1232 * recreated on the server, with the same inode. 1233 * There's nothing really we can do, so let us just 1234 * return ENOENT. After all, the entry must not have 1235 * existed in the recent past. If the user tries 1236 * again, it will work. 1237 */ 1238 fuse_internal_vnode_disappear(vp); 1239 err = ENOENT; 1240 } 1241 } 1242 if (err == 0) { 1243 struct fuse_attr_out *fao = (struct fuse_attr_out*)fdi.answ; 1244 fuse_vnode_undirty_cached_timestamps(vp, true); 1245 fuse_internal_cache_attrs(vp, &fao->attr, fao->attr_valid, 1246 fao->attr_valid_nsec, NULL, false); 1247 getnanouptime(&fvdat->last_local_modify); 1248 } 1249 1250 out: 1251 fdisp_destroy(&fdi); 1252 return err; 1253 } 1254 1255 /* 1256 * FreeBSD clears the SUID and SGID bits on any write by a non-root user. 1257 */ 1258 void 1259 fuse_internal_clear_suid_on_write(struct vnode *vp, struct ucred *cred, 1260 struct thread *td) 1261 { 1262 struct fuse_data *data; 1263 struct mount *mp; 1264 struct vattr va; 1265 int dataflags; 1266 1267 mp = vnode_mount(vp); 1268 data = fuse_get_mpdata(mp); 1269 dataflags = data->dataflags; 1270 1271 ASSERT_VOP_LOCKED(vp, __func__); 1272 1273 if (dataflags & FSESS_DEFAULT_PERMISSIONS) { 1274 if (priv_check_cred(cred, PRIV_VFS_RETAINSUGID)) { 1275 fuse_internal_getattr(vp, &va, cred, td); 1276 if (va.va_mode & (S_ISUID | S_ISGID)) { 1277 mode_t mode = va.va_mode & ~(S_ISUID | S_ISGID); 1278 /* Clear all vattr fields except mode */ 1279 vattr_null(&va); 1280 va.va_mode = mode; 1281 1282 /* 1283 * Ignore fuse_internal_setattr's return value, 1284 * because at this point the write operation has 1285 * already succeeded and we don't want to return 1286 * failing status for that. 1287 */ 1288 (void)fuse_internal_setattr(vp, &va, td, NULL); 1289 } 1290 } 1291 } 1292 } 1293 1294 #ifdef ZERO_PAD_INCOMPLETE_BUFS 1295 static int 1296 isbzero(void *buf, size_t len) 1297 { 1298 int i; 1299 1300 for (i = 0; i < len; i++) { 1301 if (((char *)buf)[i]) 1302 return (0); 1303 } 1304 1305 return (1); 1306 } 1307 1308 #endif 1309 1310 void 1311 fuse_internal_init(void) 1312 { 1313 fuse_lookup_cache_misses = counter_u64_alloc(M_WAITOK); 1314 fuse_lookup_cache_hits = counter_u64_alloc(M_WAITOK); 1315 } 1316 1317 void 1318 fuse_internal_destroy(void) 1319 { 1320 counter_u64_free(fuse_lookup_cache_hits); 1321 counter_u64_free(fuse_lookup_cache_misses); 1322 }
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