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_VOP_ELOCKED(vp, "fuse_internal_cache_attrs"); 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 fuse_vnode_clear_attr_cache(dvp); 482 vput(dvp); 483 return (0); 484 } 485 486 SDT_PROBE_DEFINE2(fusefs, , internal, invalidate_inode, 487 "struct vnode*", "struct fuse_notify_inval_inode_out *"); 488 int 489 fuse_internal_invalidate_inode(struct mount *mp, struct uio *uio) 490 { 491 struct fuse_notify_inval_inode_out fniio; 492 struct vnode *vp; 493 int err; 494 495 if ((err = uiomove(&fniio, sizeof(fniio), uio)) != 0) 496 return (err); 497 498 if (fniio.ino == FUSE_ROOT_ID) 499 err = VFS_ROOT(mp, LK_EXCLUSIVE, &vp); 500 else 501 err = fuse_internal_get_cached_vnode(mp, fniio.ino, LK_SHARED, 502 &vp); 503 SDT_PROBE2(fusefs, , internal, invalidate_inode, vp, &fniio); 504 if (err != 0 || vp == NULL) 505 return (err); 506 /* 507 * XXX we can't check vp's generation because the FUSE invalidate 508 * entry message doesn't include it. Worse case is that we invalidate 509 * an inode that didn't need to be invalidated. 510 */ 511 512 /* 513 * Flush and invalidate buffers if off >= 0. Technically we only need 514 * to flush and invalidate the range of offsets [off, off + len), but 515 * for simplicity's sake we do everything. 516 */ 517 if (fniio.off >= 0) 518 fuse_io_invalbuf(vp, curthread); 519 fuse_vnode_clear_attr_cache(vp); 520 vput(vp); 521 return (0); 522 } 523 524 /* mknod */ 525 int 526 fuse_internal_mknod(struct vnode *dvp, struct vnode **vpp, 527 struct componentname *cnp, struct vattr *vap) 528 { 529 struct fuse_data *data; 530 struct fuse_mknod_in fmni; 531 size_t insize; 532 533 data = fuse_get_mpdata(dvp->v_mount); 534 535 fmni.mode = MAKEIMODE(vap->va_type, vap->va_mode); 536 fmni.rdev = vap->va_rdev; 537 if (fuse_libabi_geq(data, 7, 12)) { 538 insize = sizeof(fmni); 539 fmni.umask = curthread->td_proc->p_pd->pd_cmask; 540 fmni.padding = 0; 541 } else { 542 insize = FUSE_COMPAT_MKNOD_IN_SIZE; 543 } 544 return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKNOD, &fmni, 545 insize, vap->va_type)); 546 } 547 548 /* readdir */ 549 550 int 551 fuse_internal_readdir(struct vnode *vp, 552 struct uio *uio, 553 struct fuse_filehandle *fufh, 554 struct fuse_iov *cookediov, 555 int *ncookies, 556 uint64_t *cookies) 557 { 558 int err = 0; 559 struct fuse_dispatcher fdi; 560 struct fuse_read_in *fri = NULL; 561 562 if (uio_resid(uio) == 0) 563 return 0; 564 fdisp_init(&fdi, 0); 565 566 /* 567 * Note that we DO NOT have a UIO_SYSSPACE here (so no need for p2p 568 * I/O). 569 */ 570 while (uio_resid(uio) > 0) { 571 fdi.iosize = sizeof(*fri); 572 fdisp_make_vp(&fdi, FUSE_READDIR, vp, NULL, NULL); 573 fri = fdi.indata; 574 fri->fh = fufh->fh_id; 575 fri->offset = uio_offset(uio); 576 fri->size = MIN(uio->uio_resid, 577 fuse_get_mpdata(vp->v_mount)->max_read); 578 579 if ((err = fdisp_wait_answ(&fdi))) 580 break; 581 if ((err = fuse_internal_readdir_processdata(uio, fri->size, 582 fdi.answ, fdi.iosize, cookediov, ncookies, &cookies))) 583 break; 584 } 585 586 fdisp_destroy(&fdi); 587 return ((err == -1) ? 0 : err); 588 } 589 590 /* 591 * Return -1 to indicate that this readdir is finished, 0 if it copied 592 * all the directory data read in and it may be possible to read more 593 * and greater than 0 for a failure. 594 */ 595 int 596 fuse_internal_readdir_processdata(struct uio *uio, 597 size_t reqsize, 598 void *buf, 599 size_t bufsize, 600 struct fuse_iov *cookediov, 601 int *ncookies, 602 uint64_t **cookiesp) 603 { 604 int err = 0; 605 int oreclen; 606 size_t freclen; 607 608 struct dirent *de; 609 struct fuse_dirent *fudge; 610 uint64_t *cookies; 611 612 cookies = *cookiesp; 613 if (bufsize < FUSE_NAME_OFFSET) 614 return -1; 615 for (;;) { 616 if (bufsize < FUSE_NAME_OFFSET) { 617 err = -1; 618 break; 619 } 620 fudge = (struct fuse_dirent *)buf; 621 freclen = FUSE_DIRENT_SIZE(fudge); 622 623 if (bufsize < freclen) { 624 /* 625 * This indicates a partial directory entry at the 626 * end of the directory data. 627 */ 628 err = -1; 629 break; 630 } 631 #ifdef ZERO_PAD_INCOMPLETE_BUFS 632 if (isbzero(buf, FUSE_NAME_OFFSET)) { 633 err = -1; 634 break; 635 } 636 #endif 637 638 if (!fudge->namelen || fudge->namelen > MAXNAMLEN) { 639 err = EINVAL; 640 break; 641 } 642 oreclen = GENERIC_DIRSIZ((struct pseudo_dirent *) 643 &fudge->namelen); 644 645 if (oreclen > uio_resid(uio)) { 646 /* Out of space for the dir so we are done. */ 647 err = -1; 648 break; 649 } 650 fiov_adjust(cookediov, oreclen); 651 bzero(cookediov->base, oreclen); 652 653 de = (struct dirent *)cookediov->base; 654 de->d_fileno = fudge->ino; 655 de->d_off = fudge->off; 656 de->d_reclen = oreclen; 657 de->d_type = fudge->type; 658 de->d_namlen = fudge->namelen; 659 memcpy((char *)cookediov->base + sizeof(struct dirent) - 660 MAXNAMLEN - 1, 661 (char *)buf + FUSE_NAME_OFFSET, fudge->namelen); 662 dirent_terminate(de); 663 664 err = uiomove(cookediov->base, cookediov->len, uio); 665 if (err) 666 break; 667 if (cookies != NULL) { 668 if (*ncookies == 0) { 669 err = -1; 670 break; 671 } 672 *cookies = fudge->off; 673 cookies++; 674 (*ncookies)--; 675 } 676 buf = (char *)buf + freclen; 677 bufsize -= freclen; 678 uio_setoffset(uio, fudge->off); 679 } 680 *cookiesp = cookies; 681 682 return err; 683 } 684 685 /* remove */ 686 687 int 688 fuse_internal_remove(struct vnode *dvp, 689 struct vnode *vp, 690 struct componentname *cnp, 691 enum fuse_opcode op) 692 { 693 struct fuse_dispatcher fdi; 694 nlink_t nlink; 695 int err = 0; 696 697 fdisp_init(&fdi, cnp->cn_namelen + 1); 698 fdisp_make_vp(&fdi, op, dvp, curthread, cnp->cn_cred); 699 700 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen); 701 ((char *)fdi.indata)[cnp->cn_namelen] = '\0'; 702 703 err = fdisp_wait_answ(&fdi); 704 fdisp_destroy(&fdi); 705 706 if (err) 707 return (err); 708 709 /* 710 * Access the cached nlink even if the attr cached has expired. If 711 * it's inaccurate, the worst that will happen is: 712 * 1) We'll recycle the vnode even though the file has another link we 713 * don't know about, costing a bit of cpu time, or 714 * 2) We won't recycle the vnode even though all of its links are gone. 715 * It will linger around until vnlru reclaims it, costing a bit of 716 * temporary memory. 717 */ 718 nlink = VTOFUD(vp)->cached_attrs.va_nlink--; 719 720 /* 721 * Purge the parent's attribute cache because the daemon 722 * should've updated its mtime and ctime. 723 */ 724 fuse_vnode_clear_attr_cache(dvp); 725 726 /* NB: nlink could be zero if it was never cached */ 727 if (nlink <= 1 || vnode_vtype(vp) == VDIR) { 728 fuse_internal_vnode_disappear(vp); 729 } else { 730 cache_purge(vp); 731 fuse_vnode_update(vp, FN_CTIMECHANGE); 732 } 733 734 return err; 735 } 736 737 /* rename */ 738 739 int 740 fuse_internal_rename(struct vnode *fdvp, 741 struct componentname *fcnp, 742 struct vnode *tdvp, 743 struct componentname *tcnp) 744 { 745 struct fuse_dispatcher fdi; 746 struct fuse_rename_in *fri; 747 int err = 0; 748 749 fdisp_init(&fdi, sizeof(*fri) + fcnp->cn_namelen + tcnp->cn_namelen + 2); 750 fdisp_make_vp(&fdi, FUSE_RENAME, fdvp, curthread, tcnp->cn_cred); 751 752 fri = fdi.indata; 753 fri->newdir = VTOI(tdvp); 754 memcpy((char *)fdi.indata + sizeof(*fri), fcnp->cn_nameptr, 755 fcnp->cn_namelen); 756 ((char *)fdi.indata)[sizeof(*fri) + fcnp->cn_namelen] = '\0'; 757 memcpy((char *)fdi.indata + sizeof(*fri) + fcnp->cn_namelen + 1, 758 tcnp->cn_nameptr, tcnp->cn_namelen); 759 ((char *)fdi.indata)[sizeof(*fri) + fcnp->cn_namelen + 760 tcnp->cn_namelen + 1] = '\0'; 761 762 err = fdisp_wait_answ(&fdi); 763 fdisp_destroy(&fdi); 764 return err; 765 } 766 767 /* strategy */ 768 769 /* entity creation */ 770 771 void 772 fuse_internal_newentry_makerequest(struct mount *mp, 773 uint64_t dnid, 774 struct componentname *cnp, 775 enum fuse_opcode op, 776 void *buf, 777 size_t bufsize, 778 struct fuse_dispatcher *fdip) 779 { 780 fdip->iosize = bufsize + cnp->cn_namelen + 1; 781 782 fdisp_make(fdip, op, mp, dnid, curthread, cnp->cn_cred); 783 memcpy(fdip->indata, buf, bufsize); 784 memcpy((char *)fdip->indata + bufsize, cnp->cn_nameptr, cnp->cn_namelen); 785 ((char *)fdip->indata)[bufsize + cnp->cn_namelen] = '\0'; 786 } 787 788 int 789 fuse_internal_newentry_core(struct vnode *dvp, 790 struct vnode **vpp, 791 struct componentname *cnp, 792 __enum_uint8(vtype) vtyp, 793 struct fuse_dispatcher *fdip) 794 { 795 int err = 0; 796 struct fuse_entry_out *feo; 797 struct mount *mp = vnode_mount(dvp); 798 799 if ((err = fdisp_wait_answ(fdip))) { 800 return err; 801 } 802 feo = fdip->answ; 803 804 if ((err = fuse_internal_checkentry(feo, vtyp))) { 805 return err; 806 } 807 err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, vtyp); 808 if (err) { 809 fuse_internal_forget_send(mp, curthread, cnp->cn_cred, 810 feo->nodeid, 1); 811 return err; 812 } 813 814 /* 815 * Purge the parent's attribute cache because the daemon should've 816 * updated its mtime and ctime 817 */ 818 fuse_vnode_clear_attr_cache(dvp); 819 820 fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid, 821 feo->attr_valid_nsec, NULL, true); 822 823 return err; 824 } 825 826 int 827 fuse_internal_newentry(struct vnode *dvp, 828 struct vnode **vpp, 829 struct componentname *cnp, 830 enum fuse_opcode op, 831 void *buf, 832 size_t bufsize, 833 __enum_uint8(vtype) vtype) 834 { 835 int err; 836 struct fuse_dispatcher fdi; 837 struct mount *mp = vnode_mount(dvp); 838 839 fdisp_init(&fdi, 0); 840 fuse_internal_newentry_makerequest(mp, VTOI(dvp), cnp, op, buf, 841 bufsize, &fdi); 842 err = fuse_internal_newentry_core(dvp, vpp, cnp, vtype, &fdi); 843 fdisp_destroy(&fdi); 844 845 return err; 846 } 847 848 /* entity destruction */ 849 850 int 851 fuse_internal_forget_callback(struct fuse_ticket *ftick, struct uio *uio) 852 { 853 fuse_internal_forget_send(ftick->tk_data->mp, curthread, NULL, 854 ((struct fuse_in_header *)ftick->tk_ms_fiov.base)->nodeid, 1); 855 856 return 0; 857 } 858 859 void 860 fuse_internal_forget_send(struct mount *mp, 861 struct thread *td, 862 struct ucred *cred, 863 uint64_t nodeid, 864 uint64_t nlookup) 865 { 866 867 struct fuse_dispatcher fdi; 868 struct fuse_forget_in *ffi; 869 870 /* 871 * KASSERT(nlookup > 0, ("zero-times forget for vp #%llu", 872 * (long long unsigned) nodeid)); 873 */ 874 875 fdisp_init(&fdi, sizeof(*ffi)); 876 fdisp_make(&fdi, FUSE_FORGET, mp, nodeid, td, cred); 877 878 ffi = fdi.indata; 879 ffi->nlookup = nlookup; 880 881 fuse_insert_message(fdi.tick, false); 882 fdisp_destroy(&fdi); 883 } 884 885 /* Fetch the vnode's attributes from the daemon*/ 886 int 887 fuse_internal_do_getattr(struct vnode *vp, struct vattr *vap, 888 struct ucred *cred, struct thread *td) 889 { 890 struct fuse_dispatcher fdi; 891 struct fuse_vnode_data *fvdat = VTOFUD(vp); 892 struct fuse_getattr_in *fgai; 893 struct fuse_attr_out *fao; 894 off_t old_filesize = fvdat->cached_attrs.va_size; 895 struct timespec old_atime = fvdat->cached_attrs.va_atime; 896 struct timespec old_ctime = fvdat->cached_attrs.va_ctime; 897 struct timespec old_mtime = fvdat->cached_attrs.va_mtime; 898 __enum_uint8(vtype) vtyp; 899 int err; 900 901 ASSERT_VOP_LOCKED(vp, __func__); 902 903 fdisp_init(&fdi, sizeof(*fgai)); 904 fdisp_make_vp(&fdi, FUSE_GETATTR, vp, td, cred); 905 fgai = fdi.indata; 906 /* 907 * We could look up a file handle and set it in fgai->fh, but that 908 * involves extra runtime work and I'm unaware of any file systems that 909 * care. 910 */ 911 fgai->getattr_flags = 0; 912 if ((err = fdisp_wait_answ(&fdi))) { 913 if (err == ENOENT) 914 fuse_internal_vnode_disappear(vp); 915 goto out; 916 } 917 918 fao = (struct fuse_attr_out *)fdi.answ; 919 vtyp = IFTOVT(fao->attr.mode); 920 if (fvdat->flag & FN_SIZECHANGE) 921 fao->attr.size = old_filesize; 922 if (fvdat->flag & FN_ATIMECHANGE) { 923 fao->attr.atime = old_atime.tv_sec; 924 fao->attr.atimensec = old_atime.tv_nsec; 925 } 926 if (fvdat->flag & FN_CTIMECHANGE) { 927 fao->attr.ctime = old_ctime.tv_sec; 928 fao->attr.ctimensec = old_ctime.tv_nsec; 929 } 930 if (fvdat->flag & FN_MTIMECHANGE) { 931 fao->attr.mtime = old_mtime.tv_sec; 932 fao->attr.mtimensec = old_mtime.tv_nsec; 933 } 934 fuse_internal_cache_attrs(vp, &fao->attr, fao->attr_valid, 935 fao->attr_valid_nsec, vap, true); 936 if (vtyp != vnode_vtype(vp)) { 937 fuse_internal_vnode_disappear(vp); 938 err = ENOENT; 939 } 940 941 out: 942 fdisp_destroy(&fdi); 943 return err; 944 } 945 946 /* Read a vnode's attributes from cache or fetch them from the fuse daemon */ 947 int 948 fuse_internal_getattr(struct vnode *vp, struct vattr *vap, struct ucred *cred, 949 struct thread *td) 950 { 951 struct vattr *attrs; 952 953 if ((attrs = VTOVA(vp)) != NULL) { 954 *vap = *attrs; /* struct copy */ 955 return 0; 956 } 957 958 return fuse_internal_do_getattr(vp, vap, cred, td); 959 } 960 961 void 962 fuse_internal_vnode_disappear(struct vnode *vp) 963 { 964 struct fuse_vnode_data *fvdat = VTOFUD(vp); 965 966 ASSERT_VOP_ELOCKED(vp, "fuse_internal_vnode_disappear"); 967 fvdat->flag |= FN_REVOKED; 968 cache_purge(vp); 969 } 970 971 /* fuse start/stop */ 972 973 SDT_PROBE_DEFINE2(fusefs, , internal, init_done, 974 "struct fuse_data*", "struct fuse_init_out*"); 975 int 976 fuse_internal_init_callback(struct fuse_ticket *tick, struct uio *uio) 977 { 978 int err = 0; 979 struct fuse_data *data = tick->tk_data; 980 struct fuse_init_out *fiio = NULL; 981 982 if ((err = tick->tk_aw_ohead.error)) { 983 goto out; 984 } 985 if ((err = fticket_pull(tick, uio))) { 986 goto out; 987 } 988 fiio = fticket_resp(tick)->base; 989 990 data->fuse_libabi_major = fiio->major; 991 data->fuse_libabi_minor = fiio->minor; 992 if (!fuse_libabi_geq(data, 7, 4)) { 993 /* 994 * With a little work we could support servers as old as 7.1. 995 * But there would be little payoff. 996 */ 997 SDT_PROBE2(fusefs, , internal, trace, 1, 998 "userspace version too low"); 999 err = EPROTONOSUPPORT; 1000 goto out; 1001 } 1002 1003 if (fuse_libabi_geq(data, 7, 5)) { 1004 if (fticket_resp(tick)->len == sizeof(struct fuse_init_out) || 1005 fticket_resp(tick)->len == FUSE_COMPAT_22_INIT_OUT_SIZE) { 1006 data->max_write = fiio->max_write; 1007 if (fiio->flags & FUSE_ASYNC_READ) 1008 data->dataflags |= FSESS_ASYNC_READ; 1009 if (fiio->flags & FUSE_POSIX_LOCKS) 1010 data->dataflags |= FSESS_POSIX_LOCKS; 1011 if (fiio->flags & FUSE_EXPORT_SUPPORT) 1012 data->dataflags |= FSESS_EXPORT_SUPPORT; 1013 if (fiio->flags & FUSE_NO_OPEN_SUPPORT) 1014 data->dataflags |= FSESS_NO_OPEN_SUPPORT; 1015 if (fiio->flags & FUSE_NO_OPENDIR_SUPPORT) 1016 data->dataflags |= FSESS_NO_OPENDIR_SUPPORT; 1017 /* 1018 * Don't bother to check FUSE_BIG_WRITES, because it's 1019 * redundant with max_write 1020 */ 1021 /* 1022 * max_background and congestion_threshold are not 1023 * implemented 1024 */ 1025 } else { 1026 err = EINVAL; 1027 } 1028 } else { 1029 /* Old fixed values */ 1030 data->max_write = 4096; 1031 } 1032 1033 if (fuse_libabi_geq(data, 7, 6)) 1034 data->max_readahead_blocks = fiio->max_readahead / maxbcachebuf; 1035 1036 if (!fuse_libabi_geq(data, 7, 7)) 1037 fsess_set_notimpl(data->mp, FUSE_INTERRUPT); 1038 1039 if (!fuse_libabi_geq(data, 7, 8)) { 1040 fsess_set_notimpl(data->mp, FUSE_BMAP); 1041 fsess_set_notimpl(data->mp, FUSE_DESTROY); 1042 } 1043 1044 if (!fuse_libabi_geq(data, 7, 19)) { 1045 fsess_set_notimpl(data->mp, FUSE_FALLOCATE); 1046 } 1047 1048 if (fuse_libabi_geq(data, 7, 23) && fiio->time_gran >= 1 && 1049 fiio->time_gran <= 1000000000) 1050 data->time_gran = fiio->time_gran; 1051 else 1052 data->time_gran = 1; 1053 1054 if (!fuse_libabi_geq(data, 7, 23)) 1055 data->cache_mode = fuse_data_cache_mode; 1056 else if (fiio->flags & FUSE_WRITEBACK_CACHE) 1057 data->cache_mode = FUSE_CACHE_WB; 1058 else 1059 data->cache_mode = FUSE_CACHE_WT; 1060 1061 if (!fuse_libabi_geq(data, 7, 24)) 1062 fsess_set_notimpl(data->mp, FUSE_LSEEK); 1063 1064 if (!fuse_libabi_geq(data, 7, 28)) 1065 fsess_set_notimpl(data->mp, FUSE_COPY_FILE_RANGE); 1066 1067 out: 1068 if (err) { 1069 fdata_set_dead(data); 1070 } 1071 FUSE_LOCK(); 1072 data->dataflags |= FSESS_INITED; 1073 SDT_PROBE2(fusefs, , internal, init_done, data, fiio); 1074 wakeup(&data->ticketer); 1075 FUSE_UNLOCK(); 1076 1077 return 0; 1078 } 1079 1080 void 1081 fuse_internal_send_init(struct fuse_data *data, struct thread *td) 1082 { 1083 struct fuse_init_in *fiii; 1084 struct fuse_dispatcher fdi; 1085 1086 fdisp_init(&fdi, sizeof(*fiii)); 1087 fdisp_make(&fdi, FUSE_INIT, data->mp, 0, td, NULL); 1088 fiii = fdi.indata; 1089 fiii->major = FUSE_KERNEL_VERSION; 1090 fiii->minor = FUSE_KERNEL_MINOR_VERSION; 1091 /* 1092 * fusefs currently reads ahead no more than one cache block at a time. 1093 * See fuse_read_biobackend 1094 */ 1095 fiii->max_readahead = maxbcachebuf; 1096 /* 1097 * Unsupported features: 1098 * FUSE_FILE_OPS: No known FUSE server or client supports it 1099 * FUSE_ATOMIC_O_TRUNC: our VFS cannot support it 1100 * FUSE_DONT_MASK: unlike Linux, FreeBSD always applies the umask, even 1101 * when default ACLs are in use. 1102 * FUSE_SPLICE_WRITE, FUSE_SPLICE_MOVE, FUSE_SPLICE_READ: FreeBSD 1103 * doesn't have splice(2). 1104 * FUSE_FLOCK_LOCKS: not yet implemented 1105 * FUSE_HAS_IOCTL_DIR: not yet implemented 1106 * FUSE_AUTO_INVAL_DATA: not yet implemented 1107 * FUSE_DO_READDIRPLUS: not yet implemented 1108 * FUSE_READDIRPLUS_AUTO: not yet implemented 1109 * FUSE_ASYNC_DIO: not yet implemented 1110 * FUSE_PARALLEL_DIROPS: not yet implemented 1111 * FUSE_HANDLE_KILLPRIV: not yet implemented 1112 * FUSE_POSIX_ACL: not yet implemented 1113 * FUSE_ABORT_ERROR: not yet implemented 1114 * FUSE_CACHE_SYMLINKS: not yet implemented 1115 * FUSE_MAX_PAGES: not yet implemented 1116 */ 1117 fiii->flags = FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_EXPORT_SUPPORT 1118 | FUSE_BIG_WRITES | FUSE_WRITEBACK_CACHE 1119 | FUSE_NO_OPEN_SUPPORT | FUSE_NO_OPENDIR_SUPPORT; 1120 1121 fuse_insert_callback(fdi.tick, fuse_internal_init_callback); 1122 fuse_insert_message(fdi.tick, false); 1123 fdisp_destroy(&fdi); 1124 } 1125 1126 /* 1127 * Send a FUSE_SETATTR operation with no permissions checks. If cred is NULL, 1128 * send the request with root credentials 1129 */ 1130 int fuse_internal_setattr(struct vnode *vp, struct vattr *vap, 1131 struct thread *td, struct ucred *cred) 1132 { 1133 struct fuse_vnode_data *fvdat; 1134 struct fuse_dispatcher fdi; 1135 struct fuse_setattr_in *fsai; 1136 struct mount *mp; 1137 pid_t pid = td->td_proc->p_pid; 1138 struct fuse_data *data; 1139 int err = 0; 1140 __enum_uint8(vtype) vtyp; 1141 1142 ASSERT_VOP_ELOCKED(vp, __func__); 1143 1144 mp = vnode_mount(vp); 1145 fvdat = VTOFUD(vp); 1146 data = fuse_get_mpdata(mp); 1147 1148 fdisp_init(&fdi, sizeof(*fsai)); 1149 fdisp_make_vp(&fdi, FUSE_SETATTR, vp, td, cred); 1150 if (!cred) { 1151 fdi.finh->uid = 0; 1152 fdi.finh->gid = 0; 1153 } 1154 fsai = fdi.indata; 1155 fsai->valid = 0; 1156 1157 if (vap->va_uid != (uid_t)VNOVAL) { 1158 fsai->uid = vap->va_uid; 1159 fsai->valid |= FATTR_UID; 1160 } 1161 if (vap->va_gid != (gid_t)VNOVAL) { 1162 fsai->gid = vap->va_gid; 1163 fsai->valid |= FATTR_GID; 1164 } 1165 if (vap->va_size != VNOVAL) { 1166 struct fuse_filehandle *fufh = NULL; 1167 1168 /*Truncate to a new value. */ 1169 fsai->size = vap->va_size; 1170 fsai->valid |= FATTR_SIZE; 1171 1172 fuse_filehandle_getrw(vp, FWRITE, &fufh, cred, pid); 1173 if (fufh) { 1174 fsai->fh = fufh->fh_id; 1175 fsai->valid |= FATTR_FH; 1176 } 1177 VTOFUD(vp)->flag &= ~FN_SIZECHANGE; 1178 } 1179 if (vap->va_atime.tv_sec != VNOVAL) { 1180 fsai->atime = vap->va_atime.tv_sec; 1181 fsai->atimensec = vap->va_atime.tv_nsec; 1182 fsai->valid |= FATTR_ATIME; 1183 if (vap->va_vaflags & VA_UTIMES_NULL) 1184 fsai->valid |= FATTR_ATIME_NOW; 1185 } else if (fvdat->flag & FN_ATIMECHANGE) { 1186 fsai->atime = fvdat->cached_attrs.va_atime.tv_sec; 1187 fsai->atimensec = fvdat->cached_attrs.va_atime.tv_nsec; 1188 fsai->valid |= FATTR_ATIME; 1189 } 1190 if (vap->va_mtime.tv_sec != VNOVAL) { 1191 fsai->mtime = vap->va_mtime.tv_sec; 1192 fsai->mtimensec = vap->va_mtime.tv_nsec; 1193 fsai->valid |= FATTR_MTIME; 1194 if (vap->va_vaflags & VA_UTIMES_NULL) 1195 fsai->valid |= FATTR_MTIME_NOW; 1196 } else if (fvdat->flag & FN_MTIMECHANGE) { 1197 fsai->mtime = fvdat->cached_attrs.va_mtime.tv_sec; 1198 fsai->mtimensec = fvdat->cached_attrs.va_mtime.tv_nsec; 1199 fsai->valid |= FATTR_MTIME; 1200 } 1201 if (fuse_libabi_geq(data, 7, 23) && fvdat->flag & FN_CTIMECHANGE) { 1202 fsai->ctime = fvdat->cached_attrs.va_ctime.tv_sec; 1203 fsai->ctimensec = fvdat->cached_attrs.va_ctime.tv_nsec; 1204 fsai->valid |= FATTR_CTIME; 1205 } 1206 if (vap->va_mode != (mode_t)VNOVAL) { 1207 fsai->mode = vap->va_mode & ALLPERMS; 1208 fsai->valid |= FATTR_MODE; 1209 } 1210 if (!fsai->valid) { 1211 goto out; 1212 } 1213 1214 if ((err = fdisp_wait_answ(&fdi))) 1215 goto out; 1216 vtyp = IFTOVT(((struct fuse_attr_out *)fdi.answ)->attr.mode); 1217 1218 if (vnode_vtype(vp) != vtyp) { 1219 if (vnode_vtype(vp) == VNON && vtyp != VNON) { 1220 SDT_PROBE2(fusefs, , internal, trace, 1, "FUSE: Dang! " 1221 "vnode_vtype is VNON and vtype isn't."); 1222 } else { 1223 /* 1224 * STALE vnode, ditch 1225 * 1226 * The vnode has changed its type "behind our back". 1227 * This probably means that the file got deleted and 1228 * recreated on the server, with the same inode. 1229 * There's nothing really we can do, so let us just 1230 * return ENOENT. After all, the entry must not have 1231 * existed in the recent past. If the user tries 1232 * again, it will work. 1233 */ 1234 fuse_internal_vnode_disappear(vp); 1235 err = ENOENT; 1236 } 1237 } 1238 if (err == 0) { 1239 struct fuse_attr_out *fao = (struct fuse_attr_out*)fdi.answ; 1240 fuse_vnode_undirty_cached_timestamps(vp, true); 1241 fuse_internal_cache_attrs(vp, &fao->attr, fao->attr_valid, 1242 fao->attr_valid_nsec, NULL, false); 1243 getnanouptime(&fvdat->last_local_modify); 1244 } 1245 1246 out: 1247 fdisp_destroy(&fdi); 1248 return err; 1249 } 1250 1251 /* 1252 * FreeBSD clears the SUID and SGID bits on any write by a non-root user. 1253 */ 1254 void 1255 fuse_internal_clear_suid_on_write(struct vnode *vp, struct ucred *cred, 1256 struct thread *td) 1257 { 1258 struct fuse_data *data; 1259 struct mount *mp; 1260 struct vattr va; 1261 int dataflags; 1262 1263 mp = vnode_mount(vp); 1264 data = fuse_get_mpdata(mp); 1265 dataflags = data->dataflags; 1266 1267 ASSERT_VOP_LOCKED(vp, __func__); 1268 1269 if (dataflags & FSESS_DEFAULT_PERMISSIONS) { 1270 if (priv_check_cred(cred, PRIV_VFS_RETAINSUGID)) { 1271 fuse_internal_getattr(vp, &va, cred, td); 1272 if (va.va_mode & (S_ISUID | S_ISGID)) { 1273 mode_t mode = va.va_mode & ~(S_ISUID | S_ISGID); 1274 /* Clear all vattr fields except mode */ 1275 vattr_null(&va); 1276 va.va_mode = mode; 1277 1278 /* 1279 * Ignore fuse_internal_setattr's return value, 1280 * because at this point the write operation has 1281 * already succeeded and we don't want to return 1282 * failing status for that. 1283 */ 1284 (void)fuse_internal_setattr(vp, &va, td, NULL); 1285 } 1286 } 1287 } 1288 } 1289 1290 #ifdef ZERO_PAD_INCOMPLETE_BUFS 1291 static int 1292 isbzero(void *buf, size_t len) 1293 { 1294 int i; 1295 1296 for (i = 0; i < len; i++) { 1297 if (((char *)buf)[i]) 1298 return (0); 1299 } 1300 1301 return (1); 1302 } 1303 1304 #endif 1305 1306 void 1307 fuse_internal_init(void) 1308 { 1309 fuse_lookup_cache_misses = counter_u64_alloc(M_WAITOK); 1310 fuse_lookup_cache_hits = counter_u64_alloc(M_WAITOK); 1311 } 1312 1313 void 1314 fuse_internal_destroy(void) 1315 { 1316 counter_u64_free(fuse_lookup_cache_hits); 1317 counter_u64_free(fuse_lookup_cache_misses); 1318 } 1319