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 int vtype; 173 struct mount *mp; 174 struct fuse_dispatcher fdi; 175 struct fuse_access_in *fai; 176 struct fuse_data *data; 177 178 mp = vnode_mount(vp); 179 vtype = vnode_vtype(vp); 180 181 data = fuse_get_mpdata(mp); 182 dataflags = data->dataflags; 183 184 if (mode == 0) 185 return 0; 186 187 if (mode & VMODIFY_PERMS && vfs_isrdonly(mp)) { 188 switch (vp->v_type) { 189 case VDIR: 190 /* FALLTHROUGH */ 191 case VLNK: 192 /* FALLTHROUGH */ 193 case VREG: 194 return EROFS; 195 default: 196 break; 197 } 198 } 199 200 /* Unless explicitly permitted, deny everyone except the fs owner. */ 201 if (!(dataflags & FSESS_DAEMON_CAN_SPY)) { 202 if (fuse_match_cred(data->daemoncred, cred)) 203 return EPERM; 204 } 205 206 if (dataflags & FSESS_DEFAULT_PERMISSIONS) { 207 struct vattr va; 208 209 fuse_internal_getattr(vp, &va, cred, td); 210 return vaccess(vp->v_type, va.va_mode, va.va_uid, 211 va.va_gid, mode, cred); 212 } 213 214 if (mode & VADMIN) { 215 /* 216 * The FUSE protocol doesn't have an equivalent of VADMIN, so 217 * it's a bug if we ever reach this point with that bit set. 218 */ 219 SDT_PROBE0(fusefs, , internal, access_vadmin); 220 } 221 222 if (fsess_not_impl(mp, FUSE_ACCESS)) 223 return 0; 224 225 if ((mode & (VWRITE | VAPPEND)) != 0) 226 mask |= W_OK; 227 if ((mode & VREAD) != 0) 228 mask |= R_OK; 229 if ((mode & VEXEC) != 0) 230 mask |= X_OK; 231 232 fdisp_init(&fdi, sizeof(*fai)); 233 fdisp_make_vp(&fdi, FUSE_ACCESS, vp, td, cred); 234 235 fai = fdi.indata; 236 fai->mask = mask; 237 238 err = fdisp_wait_answ(&fdi); 239 fdisp_destroy(&fdi); 240 241 if (err == ENOSYS) { 242 fsess_set_notimpl(mp, FUSE_ACCESS); 243 err = 0; 244 } 245 return err; 246 } 247 248 /* 249 * Cache FUSE attributes from attr, in attribute cache associated with vnode 250 * 'vp'. Optionally, if argument 'vap' is not NULL, store a copy of the 251 * converted attributes there as well. 252 * 253 * If the nominal attribute cache TTL is zero, do not cache on the 'vp' (but do 254 * return the result to the caller). 255 */ 256 void 257 fuse_internal_cache_attrs(struct vnode *vp, struct fuse_attr *attr, 258 uint64_t attr_valid, uint32_t attr_valid_nsec, struct vattr *vap) 259 { 260 struct mount *mp; 261 struct fuse_vnode_data *fvdat; 262 struct fuse_data *data; 263 struct vattr *vp_cache_at; 264 265 mp = vnode_mount(vp); 266 fvdat = VTOFUD(vp); 267 data = fuse_get_mpdata(mp); 268 269 ASSERT_VOP_ELOCKED(vp, "fuse_internal_cache_attrs"); 270 271 fuse_validity_2_bintime(attr_valid, attr_valid_nsec, 272 &fvdat->attr_cache_timeout); 273 274 /* Fix our buffers if the filesize changed without us knowing */ 275 if (vnode_isreg(vp) && attr->size != fvdat->cached_attrs.va_size) { 276 (void)fuse_vnode_setsize(vp, attr->size); 277 fvdat->cached_attrs.va_size = attr->size; 278 } 279 280 if (attr_valid > 0 || attr_valid_nsec > 0) 281 vp_cache_at = &(fvdat->cached_attrs); 282 else if (vap != NULL) 283 vp_cache_at = vap; 284 else 285 return; 286 287 vattr_null(vp_cache_at); 288 vp_cache_at->va_fsid = mp->mnt_stat.f_fsid.val[0]; 289 vp_cache_at->va_fileid = attr->ino; 290 vp_cache_at->va_mode = attr->mode & ~S_IFMT; 291 vp_cache_at->va_nlink = attr->nlink; 292 vp_cache_at->va_uid = attr->uid; 293 vp_cache_at->va_gid = attr->gid; 294 vp_cache_at->va_rdev = attr->rdev; 295 vp_cache_at->va_size = attr->size; 296 /* XXX on i386, seconds are truncated to 32 bits */ 297 vp_cache_at->va_atime.tv_sec = attr->atime; 298 vp_cache_at->va_atime.tv_nsec = attr->atimensec; 299 vp_cache_at->va_mtime.tv_sec = attr->mtime; 300 vp_cache_at->va_mtime.tv_nsec = attr->mtimensec; 301 vp_cache_at->va_ctime.tv_sec = attr->ctime; 302 vp_cache_at->va_ctime.tv_nsec = attr->ctimensec; 303 if (fuse_libabi_geq(data, 7, 9) && attr->blksize > 0) 304 vp_cache_at->va_blocksize = attr->blksize; 305 else 306 vp_cache_at->va_blocksize = PAGE_SIZE; 307 vp_cache_at->va_type = IFTOVT(attr->mode); 308 vp_cache_at->va_bytes = attr->blocks * S_BLKSIZE; 309 vp_cache_at->va_flags = 0; 310 311 if (vap != vp_cache_at && vap != NULL) 312 memcpy(vap, vp_cache_at, sizeof(*vap)); 313 } 314 315 /* fsync */ 316 317 int 318 fuse_internal_fsync_callback(struct fuse_ticket *tick, struct uio *uio) 319 { 320 if (tick->tk_aw_ohead.error == ENOSYS) { 321 fsess_set_notimpl(tick->tk_data->mp, fticket_opcode(tick)); 322 } 323 return 0; 324 } 325 326 int 327 fuse_internal_fsync(struct vnode *vp, 328 struct thread *td, 329 int waitfor, 330 bool datasync) 331 { 332 struct fuse_fsync_in *ffsi = NULL; 333 struct fuse_dispatcher fdi; 334 struct fuse_filehandle *fufh; 335 struct fuse_vnode_data *fvdat = VTOFUD(vp); 336 struct mount *mp = vnode_mount(vp); 337 int op = FUSE_FSYNC; 338 int err = 0; 339 340 if (fsess_not_impl(vnode_mount(vp), 341 (vnode_vtype(vp) == VDIR ? FUSE_FSYNCDIR : FUSE_FSYNC))) { 342 return 0; 343 } 344 if (vnode_isdir(vp)) 345 op = FUSE_FSYNCDIR; 346 347 if (fsess_not_impl(mp, op)) 348 return 0; 349 350 fdisp_init(&fdi, sizeof(*ffsi)); 351 /* 352 * fsync every open file handle for this file, because we can't be sure 353 * which file handle the caller is really referring to. 354 */ 355 LIST_FOREACH(fufh, &fvdat->handles, next) { 356 fdi.iosize = sizeof(*ffsi); 357 if (ffsi == NULL) 358 fdisp_make_vp(&fdi, op, vp, td, NULL); 359 else 360 fdisp_refresh_vp(&fdi, op, vp, td, NULL); 361 ffsi = fdi.indata; 362 ffsi->fh = fufh->fh_id; 363 ffsi->fsync_flags = 0; 364 365 if (datasync) 366 ffsi->fsync_flags = 1; 367 368 if (waitfor == MNT_WAIT) { 369 err = fdisp_wait_answ(&fdi); 370 } else { 371 fuse_insert_callback(fdi.tick, 372 fuse_internal_fsync_callback); 373 fuse_insert_message(fdi.tick, false); 374 } 375 if (err == ENOSYS) { 376 /* ENOSYS means "success, and don't call again" */ 377 fsess_set_notimpl(mp, op); 378 err = 0; 379 break; 380 } 381 } 382 fdisp_destroy(&fdi); 383 384 return err; 385 } 386 387 /* Asynchronous invalidation */ 388 SDT_PROBE_DEFINE3(fusefs, , internal, invalidate_entry, 389 "struct vnode*", "struct fuse_notify_inval_entry_out*", "char*"); 390 int 391 fuse_internal_invalidate_entry(struct mount *mp, struct uio *uio) 392 { 393 struct fuse_notify_inval_entry_out fnieo; 394 struct componentname cn; 395 struct vnode *dvp, *vp; 396 char name[PATH_MAX]; 397 int err; 398 399 if ((err = uiomove(&fnieo, sizeof(fnieo), uio)) != 0) 400 return (err); 401 402 if (fnieo.namelen >= sizeof(name)) 403 return (EINVAL); 404 405 if ((err = uiomove(name, fnieo.namelen, uio)) != 0) 406 return (err); 407 name[fnieo.namelen] = '\0'; 408 /* fusefs does not cache "." or ".." entries */ 409 if (strncmp(name, ".", sizeof(".")) == 0 || 410 strncmp(name, "..", sizeof("..")) == 0) 411 return (0); 412 413 if (fnieo.parent == FUSE_ROOT_ID) 414 err = VFS_ROOT(mp, LK_SHARED, &dvp); 415 else 416 err = fuse_internal_get_cached_vnode( mp, fnieo.parent, 417 LK_SHARED, &dvp); 418 SDT_PROBE3(fusefs, , internal, invalidate_entry, dvp, &fnieo, name); 419 /* 420 * If dvp is not in the cache, then it must've been reclaimed. And 421 * since fuse_vnop_reclaim does a cache_purge, name's entry must've 422 * been invalidated already. So we can safely return if dvp == NULL 423 */ 424 if (err != 0 || dvp == NULL) 425 return (err); 426 /* 427 * XXX we can't check dvp's generation because the FUSE invalidate 428 * entry message doesn't include it. Worse case is that we invalidate 429 * an entry that didn't need to be invalidated. 430 */ 431 432 cn.cn_nameiop = LOOKUP; 433 cn.cn_flags = 0; /* !MAKEENTRY means free cached entry */ 434 cn.cn_thread = curthread; 435 cn.cn_cred = curthread->td_ucred; 436 cn.cn_lkflags = LK_SHARED; 437 cn.cn_pnbuf = NULL; 438 cn.cn_nameptr = name; 439 cn.cn_namelen = fnieo.namelen; 440 err = cache_lookup(dvp, &vp, &cn, NULL, NULL); 441 MPASS(err == 0); 442 fuse_vnode_clear_attr_cache(dvp); 443 vput(dvp); 444 return (0); 445 } 446 447 SDT_PROBE_DEFINE2(fusefs, , internal, invalidate_inode, 448 "struct vnode*", "struct fuse_notify_inval_inode_out *"); 449 int 450 fuse_internal_invalidate_inode(struct mount *mp, struct uio *uio) 451 { 452 struct fuse_notify_inval_inode_out fniio; 453 struct vnode *vp; 454 int err; 455 456 if ((err = uiomove(&fniio, sizeof(fniio), uio)) != 0) 457 return (err); 458 459 if (fniio.ino == FUSE_ROOT_ID) 460 err = VFS_ROOT(mp, LK_EXCLUSIVE, &vp); 461 else 462 err = fuse_internal_get_cached_vnode(mp, fniio.ino, LK_SHARED, 463 &vp); 464 SDT_PROBE2(fusefs, , internal, invalidate_inode, vp, &fniio); 465 if (err != 0 || vp == NULL) 466 return (err); 467 /* 468 * XXX we can't check vp's generation because the FUSE invalidate 469 * entry message doesn't include it. Worse case is that we invalidate 470 * an inode that didn't need to be invalidated. 471 */ 472 473 /* 474 * Flush and invalidate buffers if off >= 0. Technically we only need 475 * to flush and invalidate the range of offsets [off, off + len), but 476 * for simplicity's sake we do everything. 477 */ 478 if (fniio.off >= 0) 479 fuse_io_invalbuf(vp, curthread); 480 fuse_vnode_clear_attr_cache(vp); 481 vput(vp); 482 return (0); 483 } 484 485 /* mknod */ 486 int 487 fuse_internal_mknod(struct vnode *dvp, struct vnode **vpp, 488 struct componentname *cnp, struct vattr *vap) 489 { 490 struct fuse_data *data; 491 struct fuse_mknod_in fmni; 492 size_t insize; 493 494 data = fuse_get_mpdata(dvp->v_mount); 495 496 fmni.mode = MAKEIMODE(vap->va_type, vap->va_mode); 497 fmni.rdev = vap->va_rdev; 498 if (fuse_libabi_geq(data, 7, 12)) { 499 insize = sizeof(fmni); 500 fmni.umask = curthread->td_proc->p_pd->pd_cmask; 501 } else { 502 insize = FUSE_COMPAT_MKNOD_IN_SIZE; 503 } 504 return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKNOD, &fmni, 505 insize, vap->va_type)); 506 } 507 508 /* readdir */ 509 510 int 511 fuse_internal_readdir(struct vnode *vp, 512 struct uio *uio, 513 off_t startoff, 514 struct fuse_filehandle *fufh, 515 struct fuse_iov *cookediov, 516 int *ncookies, 517 u_long *cookies) 518 { 519 int err = 0; 520 struct fuse_dispatcher fdi; 521 struct fuse_read_in *fri = NULL; 522 int fnd_start; 523 524 if (uio_resid(uio) == 0) 525 return 0; 526 fdisp_init(&fdi, 0); 527 528 /* 529 * Note that we DO NOT have a UIO_SYSSPACE here (so no need for p2p 530 * I/O). 531 */ 532 533 /* 534 * fnd_start is set non-zero once the offset in the directory gets 535 * to the startoff. This is done because directories must be read 536 * from the beginning (offset == 0) when fuse_vnop_readdir() needs 537 * to do an open of the directory. 538 * If it is not set non-zero here, it will be set non-zero in 539 * fuse_internal_readdir_processdata() when uio_offset == startoff. 540 */ 541 fnd_start = 0; 542 if (uio->uio_offset == startoff) 543 fnd_start = 1; 544 while (uio_resid(uio) > 0) { 545 fdi.iosize = sizeof(*fri); 546 if (fri == NULL) 547 fdisp_make_vp(&fdi, FUSE_READDIR, vp, NULL, NULL); 548 else 549 fdisp_refresh_vp(&fdi, FUSE_READDIR, vp, NULL, NULL); 550 551 fri = fdi.indata; 552 fri->fh = fufh->fh_id; 553 fri->offset = uio_offset(uio); 554 fri->size = MIN(uio->uio_resid, 555 fuse_get_mpdata(vp->v_mount)->max_read); 556 557 if ((err = fdisp_wait_answ(&fdi))) 558 break; 559 if ((err = fuse_internal_readdir_processdata(uio, startoff, 560 &fnd_start, fri->size, fdi.answ, fdi.iosize, cookediov, 561 ncookies, &cookies))) 562 break; 563 } 564 565 fdisp_destroy(&fdi); 566 return ((err == -1) ? 0 : err); 567 } 568 569 /* 570 * Return -1 to indicate that this readdir is finished, 0 if it copied 571 * all the directory data read in and it may be possible to read more 572 * and greater than 0 for a failure. 573 */ 574 int 575 fuse_internal_readdir_processdata(struct uio *uio, 576 off_t startoff, 577 int *fnd_start, 578 size_t reqsize, 579 void *buf, 580 size_t bufsize, 581 struct fuse_iov *cookediov, 582 int *ncookies, 583 u_long **cookiesp) 584 { 585 int err = 0; 586 int bytesavail; 587 size_t freclen; 588 589 struct dirent *de; 590 struct fuse_dirent *fudge; 591 u_long *cookies; 592 593 cookies = *cookiesp; 594 if (bufsize < FUSE_NAME_OFFSET) 595 return -1; 596 for (;;) { 597 if (bufsize < FUSE_NAME_OFFSET) { 598 err = -1; 599 break; 600 } 601 fudge = (struct fuse_dirent *)buf; 602 freclen = FUSE_DIRENT_SIZE(fudge); 603 604 if (bufsize < freclen) { 605 /* 606 * This indicates a partial directory entry at the 607 * end of the directory data. 608 */ 609 err = -1; 610 break; 611 } 612 #ifdef ZERO_PAD_INCOMPLETE_BUFS 613 if (isbzero(buf, FUSE_NAME_OFFSET)) { 614 err = -1; 615 break; 616 } 617 #endif 618 619 if (!fudge->namelen || fudge->namelen > MAXNAMLEN) { 620 err = EINVAL; 621 break; 622 } 623 bytesavail = GENERIC_DIRSIZ((struct pseudo_dirent *) 624 &fudge->namelen); 625 626 if (bytesavail > uio_resid(uio)) { 627 /* Out of space for the dir so we are done. */ 628 err = -1; 629 break; 630 } 631 /* 632 * Don't start to copy the directory entries out until 633 * the requested offset in the directory is found. 634 */ 635 if (*fnd_start != 0) { 636 fiov_adjust(cookediov, bytesavail); 637 bzero(cookediov->base, bytesavail); 638 639 de = (struct dirent *)cookediov->base; 640 de->d_fileno = fudge->ino; 641 de->d_reclen = bytesavail; 642 de->d_type = fudge->type; 643 de->d_namlen = fudge->namelen; 644 memcpy((char *)cookediov->base + sizeof(struct dirent) - 645 MAXNAMLEN - 1, 646 (char *)buf + FUSE_NAME_OFFSET, fudge->namelen); 647 dirent_terminate(de); 648 649 err = uiomove(cookediov->base, cookediov->len, uio); 650 if (err) 651 break; 652 if (cookies != NULL) { 653 if (*ncookies == 0) { 654 err = -1; 655 break; 656 } 657 *cookies = fudge->off; 658 cookies++; 659 (*ncookies)--; 660 } 661 } else if (startoff == fudge->off) 662 *fnd_start = 1; 663 buf = (char *)buf + freclen; 664 bufsize -= freclen; 665 uio_setoffset(uio, fudge->off); 666 } 667 *cookiesp = cookies; 668 669 return err; 670 } 671 672 /* remove */ 673 674 int 675 fuse_internal_remove(struct vnode *dvp, 676 struct vnode *vp, 677 struct componentname *cnp, 678 enum fuse_opcode op) 679 { 680 struct fuse_dispatcher fdi; 681 nlink_t nlink; 682 int err = 0; 683 684 fdisp_init(&fdi, cnp->cn_namelen + 1); 685 fdisp_make_vp(&fdi, op, dvp, cnp->cn_thread, cnp->cn_cred); 686 687 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen); 688 ((char *)fdi.indata)[cnp->cn_namelen] = '\0'; 689 690 err = fdisp_wait_answ(&fdi); 691 fdisp_destroy(&fdi); 692 693 if (err) 694 return (err); 695 696 /* 697 * Access the cached nlink even if the attr cached has expired. If 698 * it's inaccurate, the worst that will happen is: 699 * 1) We'll recycle the vnode even though the file has another link we 700 * don't know about, costing a bit of cpu time, or 701 * 2) We won't recycle the vnode even though all of its links are gone. 702 * It will linger around until vnlru reclaims it, costing a bit of 703 * temporary memory. 704 */ 705 nlink = VTOFUD(vp)->cached_attrs.va_nlink--; 706 707 /* 708 * Purge the parent's attribute cache because the daemon 709 * should've updated its mtime and ctime. 710 */ 711 fuse_vnode_clear_attr_cache(dvp); 712 713 /* NB: nlink could be zero if it was never cached */ 714 if (nlink <= 1 || vnode_vtype(vp) == VDIR) { 715 fuse_internal_vnode_disappear(vp); 716 } else { 717 cache_purge(vp); 718 fuse_vnode_update(vp, FN_CTIMECHANGE); 719 } 720 721 return err; 722 } 723 724 /* rename */ 725 726 int 727 fuse_internal_rename(struct vnode *fdvp, 728 struct componentname *fcnp, 729 struct vnode *tdvp, 730 struct componentname *tcnp) 731 { 732 struct fuse_dispatcher fdi; 733 struct fuse_rename_in *fri; 734 int err = 0; 735 736 fdisp_init(&fdi, sizeof(*fri) + fcnp->cn_namelen + tcnp->cn_namelen + 2); 737 fdisp_make_vp(&fdi, FUSE_RENAME, fdvp, tcnp->cn_thread, tcnp->cn_cred); 738 739 fri = fdi.indata; 740 fri->newdir = VTOI(tdvp); 741 memcpy((char *)fdi.indata + sizeof(*fri), fcnp->cn_nameptr, 742 fcnp->cn_namelen); 743 ((char *)fdi.indata)[sizeof(*fri) + fcnp->cn_namelen] = '\0'; 744 memcpy((char *)fdi.indata + sizeof(*fri) + fcnp->cn_namelen + 1, 745 tcnp->cn_nameptr, tcnp->cn_namelen); 746 ((char *)fdi.indata)[sizeof(*fri) + fcnp->cn_namelen + 747 tcnp->cn_namelen + 1] = '\0'; 748 749 err = fdisp_wait_answ(&fdi); 750 fdisp_destroy(&fdi); 751 return err; 752 } 753 754 /* strategy */ 755 756 /* entity creation */ 757 758 void 759 fuse_internal_newentry_makerequest(struct mount *mp, 760 uint64_t dnid, 761 struct componentname *cnp, 762 enum fuse_opcode op, 763 void *buf, 764 size_t bufsize, 765 struct fuse_dispatcher *fdip) 766 { 767 fdip->iosize = bufsize + cnp->cn_namelen + 1; 768 769 fdisp_make(fdip, op, mp, dnid, cnp->cn_thread, cnp->cn_cred); 770 memcpy(fdip->indata, buf, bufsize); 771 memcpy((char *)fdip->indata + bufsize, cnp->cn_nameptr, cnp->cn_namelen); 772 ((char *)fdip->indata)[bufsize + cnp->cn_namelen] = '\0'; 773 } 774 775 int 776 fuse_internal_newentry_core(struct vnode *dvp, 777 struct vnode **vpp, 778 struct componentname *cnp, 779 enum vtype vtyp, 780 struct fuse_dispatcher *fdip) 781 { 782 int err = 0; 783 struct fuse_entry_out *feo; 784 struct mount *mp = vnode_mount(dvp); 785 786 if ((err = fdisp_wait_answ(fdip))) { 787 return err; 788 } 789 feo = fdip->answ; 790 791 if ((err = fuse_internal_checkentry(feo, vtyp))) { 792 return err; 793 } 794 err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, vtyp); 795 if (err) { 796 fuse_internal_forget_send(mp, cnp->cn_thread, cnp->cn_cred, 797 feo->nodeid, 1); 798 return err; 799 } 800 801 /* 802 * Purge the parent's attribute cache because the daemon should've 803 * updated its mtime and ctime 804 */ 805 fuse_vnode_clear_attr_cache(dvp); 806 807 fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid, 808 feo->attr_valid_nsec, NULL); 809 810 return err; 811 } 812 813 int 814 fuse_internal_newentry(struct vnode *dvp, 815 struct vnode **vpp, 816 struct componentname *cnp, 817 enum fuse_opcode op, 818 void *buf, 819 size_t bufsize, 820 enum vtype vtype) 821 { 822 int err; 823 struct fuse_dispatcher fdi; 824 struct mount *mp = vnode_mount(dvp); 825 826 fdisp_init(&fdi, 0); 827 fuse_internal_newentry_makerequest(mp, VTOI(dvp), cnp, op, buf, 828 bufsize, &fdi); 829 err = fuse_internal_newentry_core(dvp, vpp, cnp, vtype, &fdi); 830 fdisp_destroy(&fdi); 831 832 return err; 833 } 834 835 /* entity destruction */ 836 837 int 838 fuse_internal_forget_callback(struct fuse_ticket *ftick, struct uio *uio) 839 { 840 fuse_internal_forget_send(ftick->tk_data->mp, curthread, NULL, 841 ((struct fuse_in_header *)ftick->tk_ms_fiov.base)->nodeid, 1); 842 843 return 0; 844 } 845 846 void 847 fuse_internal_forget_send(struct mount *mp, 848 struct thread *td, 849 struct ucred *cred, 850 uint64_t nodeid, 851 uint64_t nlookup) 852 { 853 854 struct fuse_dispatcher fdi; 855 struct fuse_forget_in *ffi; 856 857 /* 858 * KASSERT(nlookup > 0, ("zero-times forget for vp #%llu", 859 * (long long unsigned) nodeid)); 860 */ 861 862 fdisp_init(&fdi, sizeof(*ffi)); 863 fdisp_make(&fdi, FUSE_FORGET, mp, nodeid, td, cred); 864 865 ffi = fdi.indata; 866 ffi->nlookup = nlookup; 867 868 fuse_insert_message(fdi.tick, false); 869 fdisp_destroy(&fdi); 870 } 871 872 SDT_PROBE_DEFINE2(fusefs, , internal, getattr_cache_incoherent, 873 "struct vnode*", "struct fuse_attr_out*"); 874 875 /* Fetch the vnode's attributes from the daemon*/ 876 int 877 fuse_internal_do_getattr(struct vnode *vp, struct vattr *vap, 878 struct ucred *cred, struct thread *td) 879 { 880 struct fuse_dispatcher fdi; 881 struct fuse_vnode_data *fvdat = VTOFUD(vp); 882 struct fuse_getattr_in *fgai; 883 struct fuse_attr_out *fao; 884 off_t old_filesize = fvdat->cached_attrs.va_size; 885 struct timespec old_ctime = fvdat->cached_attrs.va_ctime; 886 struct timespec old_mtime = fvdat->cached_attrs.va_mtime; 887 enum vtype vtyp; 888 int err; 889 890 fdisp_init(&fdi, sizeof(*fgai)); 891 fdisp_make_vp(&fdi, FUSE_GETATTR, vp, td, cred); 892 fgai = fdi.indata; 893 /* 894 * We could look up a file handle and set it in fgai->fh, but that 895 * involves extra runtime work and I'm unaware of any file systems that 896 * care. 897 */ 898 fgai->getattr_flags = 0; 899 if ((err = fdisp_wait_answ(&fdi))) { 900 if (err == ENOENT) 901 fuse_internal_vnode_disappear(vp); 902 goto out; 903 } 904 905 fao = (struct fuse_attr_out *)fdi.answ; 906 vtyp = IFTOVT(fao->attr.mode); 907 if (fvdat->flag & FN_SIZECHANGE) 908 fao->attr.size = old_filesize; 909 if (fvdat->flag & FN_CTIMECHANGE) { 910 fao->attr.ctime = old_ctime.tv_sec; 911 fao->attr.ctimensec = old_ctime.tv_nsec; 912 } 913 if (fvdat->flag & FN_MTIMECHANGE) { 914 fao->attr.mtime = old_mtime.tv_sec; 915 fao->attr.mtimensec = old_mtime.tv_nsec; 916 } 917 if (vnode_isreg(vp) && 918 fvdat->cached_attrs.va_size != VNOVAL && 919 fao->attr.size != fvdat->cached_attrs.va_size) { 920 /* 921 * The server changed the file's size even though we had it 922 * cached! That's a server bug. 923 */ 924 SDT_PROBE2(fusefs, , internal, getattr_cache_incoherent, vp, 925 fao); 926 printf("%s: cache incoherent on %s! " 927 "Buggy FUSE server detected. To prevent data corruption, " 928 "disable the data cache by mounting with -o direct_io, or " 929 "as directed otherwise by your FUSE server's " 930 "documentation\n", __func__, 931 vnode_mount(vp)->mnt_stat.f_mntonname); 932 int iosize = fuse_iosize(vp); 933 v_inval_buf_range(vp, 0, INT64_MAX, iosize); 934 } 935 fuse_internal_cache_attrs(vp, &fao->attr, fao->attr_valid, 936 fao->attr_valid_nsec, vap); 937 if (vtyp != vnode_vtype(vp)) { 938 fuse_internal_vnode_disappear(vp); 939 err = ENOENT; 940 } 941 942 out: 943 fdisp_destroy(&fdi); 944 return err; 945 } 946 947 /* Read a vnode's attributes from cache or fetch them from the fuse daemon */ 948 int 949 fuse_internal_getattr(struct vnode *vp, struct vattr *vap, struct ucred *cred, 950 struct thread *td) 951 { 952 struct vattr *attrs; 953 954 if ((attrs = VTOVA(vp)) != NULL) { 955 *vap = *attrs; /* struct copy */ 956 return 0; 957 } 958 959 return fuse_internal_do_getattr(vp, vap, cred, td); 960 } 961 962 void 963 fuse_internal_vnode_disappear(struct vnode *vp) 964 { 965 struct fuse_vnode_data *fvdat = VTOFUD(vp); 966 967 ASSERT_VOP_ELOCKED(vp, "fuse_internal_vnode_disappear"); 968 fvdat->flag |= FN_REVOKED; 969 cache_purge(vp); 970 } 971 972 /* fuse start/stop */ 973 974 SDT_PROBE_DEFINE2(fusefs, , internal, init_done, 975 "struct fuse_data*", "struct fuse_init_out*"); 976 int 977 fuse_internal_init_callback(struct fuse_ticket *tick, struct uio *uio) 978 { 979 int err = 0; 980 struct fuse_data *data = tick->tk_data; 981 struct fuse_init_out *fiio; 982 983 if ((err = tick->tk_aw_ohead.error)) { 984 goto out; 985 } 986 if ((err = fticket_pull(tick, uio))) { 987 goto out; 988 } 989 fiio = fticket_resp(tick)->base; 990 991 data->fuse_libabi_major = fiio->major; 992 data->fuse_libabi_minor = fiio->minor; 993 if (!fuse_libabi_geq(data, 7, 4)) { 994 /* 995 * With a little work we could support servers as old as 7.1. 996 * But there would be little payoff. 997 */ 998 SDT_PROBE2(fusefs, , internal, trace, 1, 999 "userpace version too low"); 1000 err = EPROTONOSUPPORT; 1001 goto out; 1002 } 1003 1004 if (fuse_libabi_geq(data, 7, 5)) { 1005 if (fticket_resp(tick)->len == sizeof(struct fuse_init_out) || 1006 fticket_resp(tick)->len == FUSE_COMPAT_22_INIT_OUT_SIZE) { 1007 data->max_write = fiio->max_write; 1008 if (fiio->flags & FUSE_ASYNC_READ) 1009 data->dataflags |= FSESS_ASYNC_READ; 1010 if (fiio->flags & FUSE_POSIX_LOCKS) 1011 data->dataflags |= FSESS_POSIX_LOCKS; 1012 if (fiio->flags & FUSE_EXPORT_SUPPORT) 1013 data->dataflags |= FSESS_EXPORT_SUPPORT; 1014 /* 1015 * Don't bother to check FUSE_BIG_WRITES, because it's 1016 * redundant with max_write 1017 */ 1018 /* 1019 * max_background and congestion_threshold are not 1020 * implemented 1021 */ 1022 } else { 1023 err = EINVAL; 1024 } 1025 } else { 1026 /* Old fixed values */ 1027 data->max_write = 4096; 1028 } 1029 1030 if (fuse_libabi_geq(data, 7, 6)) 1031 data->max_readahead_blocks = fiio->max_readahead / maxbcachebuf; 1032 1033 if (!fuse_libabi_geq(data, 7, 7)) 1034 fsess_set_notimpl(data->mp, FUSE_INTERRUPT); 1035 1036 if (!fuse_libabi_geq(data, 7, 8)) { 1037 fsess_set_notimpl(data->mp, FUSE_BMAP); 1038 fsess_set_notimpl(data->mp, FUSE_DESTROY); 1039 } 1040 1041 if (fuse_libabi_geq(data, 7, 23) && fiio->time_gran >= 1 && 1042 fiio->time_gran <= 1000000000) 1043 data->time_gran = fiio->time_gran; 1044 else 1045 data->time_gran = 1; 1046 1047 if (!fuse_libabi_geq(data, 7, 23)) 1048 data->cache_mode = fuse_data_cache_mode; 1049 else if (fiio->flags & FUSE_WRITEBACK_CACHE) 1050 data->cache_mode = FUSE_CACHE_WB; 1051 else 1052 data->cache_mode = FUSE_CACHE_WT; 1053 1054 if (!fuse_libabi_geq(data, 7, 24)) 1055 fsess_set_notimpl(data->mp, FUSE_LSEEK); 1056 1057 if (!fuse_libabi_geq(data, 7, 28)) 1058 fsess_set_notimpl(data->mp, FUSE_COPY_FILE_RANGE); 1059 1060 out: 1061 if (err) { 1062 fdata_set_dead(data); 1063 } 1064 FUSE_LOCK(); 1065 data->dataflags |= FSESS_INITED; 1066 SDT_PROBE2(fusefs, , internal, init_done, data, fiio); 1067 wakeup(&data->ticketer); 1068 FUSE_UNLOCK(); 1069 1070 return 0; 1071 } 1072 1073 void 1074 fuse_internal_send_init(struct fuse_data *data, struct thread *td) 1075 { 1076 struct fuse_init_in *fiii; 1077 struct fuse_dispatcher fdi; 1078 1079 fdisp_init(&fdi, sizeof(*fiii)); 1080 fdisp_make(&fdi, FUSE_INIT, data->mp, 0, td, NULL); 1081 fiii = fdi.indata; 1082 fiii->major = FUSE_KERNEL_VERSION; 1083 fiii->minor = FUSE_KERNEL_MINOR_VERSION; 1084 /* 1085 * fusefs currently reads ahead no more than one cache block at a time. 1086 * See fuse_read_biobackend 1087 */ 1088 fiii->max_readahead = maxbcachebuf; 1089 /* 1090 * Unsupported features: 1091 * FUSE_FILE_OPS: No known FUSE server or client supports it 1092 * FUSE_ATOMIC_O_TRUNC: our VFS cannot support it 1093 * FUSE_DONT_MASK: unlike Linux, FreeBSD always applies the umask, even 1094 * when default ACLs are in use. 1095 * FUSE_SPLICE_WRITE, FUSE_SPLICE_MOVE, FUSE_SPLICE_READ: FreeBSD 1096 * doesn't have splice(2). 1097 * FUSE_FLOCK_LOCKS: not yet implemented 1098 * FUSE_HAS_IOCTL_DIR: not yet implemented 1099 * FUSE_AUTO_INVAL_DATA: not yet implemented 1100 * FUSE_DO_READDIRPLUS: not yet implemented 1101 * FUSE_READDIRPLUS_AUTO: not yet implemented 1102 * FUSE_ASYNC_DIO: not yet implemented 1103 * FUSE_NO_OPEN_SUPPORT: not yet implemented 1104 * FUSE_PARALLEL_DIROPS: not yet implemented 1105 * FUSE_HANDLE_KILLPRIV: not yet implemented 1106 * FUSE_POSIX_ACL: not yet implemented 1107 * FUSE_ABORT_ERROR: not yet implemented 1108 * FUSE_CACHE_SYMLINKS: not yet implemented 1109 * FUSE_MAX_PAGES: not yet implemented 1110 */ 1111 fiii->flags = FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_EXPORT_SUPPORT 1112 | FUSE_BIG_WRITES | FUSE_WRITEBACK_CACHE; 1113 1114 fuse_insert_callback(fdi.tick, fuse_internal_init_callback); 1115 fuse_insert_message(fdi.tick, false); 1116 fdisp_destroy(&fdi); 1117 } 1118 1119 /* 1120 * Send a FUSE_SETATTR operation with no permissions checks. If cred is NULL, 1121 * send the request with root credentials 1122 */ 1123 int fuse_internal_setattr(struct vnode *vp, struct vattr *vap, 1124 struct thread *td, struct ucred *cred) 1125 { 1126 struct fuse_vnode_data *fvdat; 1127 struct fuse_dispatcher fdi; 1128 struct fuse_setattr_in *fsai; 1129 struct mount *mp; 1130 pid_t pid = td->td_proc->p_pid; 1131 struct fuse_data *data; 1132 int dataflags; 1133 int err = 0; 1134 enum vtype vtyp; 1135 int sizechanged = -1; 1136 uint64_t newsize = 0; 1137 1138 mp = vnode_mount(vp); 1139 fvdat = VTOFUD(vp); 1140 data = fuse_get_mpdata(mp); 1141 dataflags = data->dataflags; 1142 1143 fdisp_init(&fdi, sizeof(*fsai)); 1144 fdisp_make_vp(&fdi, FUSE_SETATTR, vp, td, cred); 1145 if (!cred) { 1146 fdi.finh->uid = 0; 1147 fdi.finh->gid = 0; 1148 } 1149 fsai = fdi.indata; 1150 fsai->valid = 0; 1151 1152 if (vap->va_uid != (uid_t)VNOVAL) { 1153 fsai->uid = vap->va_uid; 1154 fsai->valid |= FATTR_UID; 1155 } 1156 if (vap->va_gid != (gid_t)VNOVAL) { 1157 fsai->gid = vap->va_gid; 1158 fsai->valid |= FATTR_GID; 1159 } 1160 if (vap->va_size != VNOVAL) { 1161 struct fuse_filehandle *fufh = NULL; 1162 1163 /*Truncate to a new value. */ 1164 fsai->size = vap->va_size; 1165 sizechanged = 1; 1166 newsize = vap->va_size; 1167 fsai->valid |= FATTR_SIZE; 1168 1169 fuse_filehandle_getrw(vp, FWRITE, &fufh, cred, pid); 1170 if (fufh) { 1171 fsai->fh = fufh->fh_id; 1172 fsai->valid |= FATTR_FH; 1173 } 1174 VTOFUD(vp)->flag &= ~FN_SIZECHANGE; 1175 } 1176 if (vap->va_atime.tv_sec != VNOVAL) { 1177 fsai->atime = vap->va_atime.tv_sec; 1178 fsai->atimensec = vap->va_atime.tv_nsec; 1179 fsai->valid |= FATTR_ATIME; 1180 if (vap->va_vaflags & VA_UTIMES_NULL) 1181 fsai->valid |= FATTR_ATIME_NOW; 1182 } 1183 if (vap->va_mtime.tv_sec != VNOVAL) { 1184 fsai->mtime = vap->va_mtime.tv_sec; 1185 fsai->mtimensec = vap->va_mtime.tv_nsec; 1186 fsai->valid |= FATTR_MTIME; 1187 if (vap->va_vaflags & VA_UTIMES_NULL) 1188 fsai->valid |= FATTR_MTIME_NOW; 1189 } else if (fvdat->flag & FN_MTIMECHANGE) { 1190 fsai->mtime = fvdat->cached_attrs.va_mtime.tv_sec; 1191 fsai->mtimensec = fvdat->cached_attrs.va_mtime.tv_nsec; 1192 fsai->valid |= FATTR_MTIME; 1193 } 1194 if (fuse_libabi_geq(data, 7, 23) && fvdat->flag & FN_CTIMECHANGE) { 1195 fsai->ctime = fvdat->cached_attrs.va_ctime.tv_sec; 1196 fsai->ctimensec = fvdat->cached_attrs.va_ctime.tv_nsec; 1197 fsai->valid |= FATTR_CTIME; 1198 } 1199 if (vap->va_mode != (mode_t)VNOVAL) { 1200 fsai->mode = vap->va_mode & ALLPERMS; 1201 fsai->valid |= FATTR_MODE; 1202 } 1203 if (!fsai->valid) { 1204 goto out; 1205 } 1206 1207 if ((err = fdisp_wait_answ(&fdi))) 1208 goto out; 1209 vtyp = IFTOVT(((struct fuse_attr_out *)fdi.answ)->attr.mode); 1210 1211 if (vnode_vtype(vp) != vtyp) { 1212 if (vnode_vtype(vp) == VNON && vtyp != VNON) { 1213 SDT_PROBE2(fusefs, , internal, trace, 1, "FUSE: Dang! " 1214 "vnode_vtype is VNON and vtype isn't."); 1215 } else { 1216 /* 1217 * STALE vnode, ditch 1218 * 1219 * The vnode has changed its type "behind our back". 1220 * There's nothing really we can do, so let us just 1221 * force an internal revocation and tell the caller to 1222 * try again, if interested. 1223 */ 1224 fuse_internal_vnode_disappear(vp); 1225 err = EAGAIN; 1226 } 1227 } 1228 if (err == 0) { 1229 struct fuse_attr_out *fao = (struct fuse_attr_out*)fdi.answ; 1230 fuse_vnode_undirty_cached_timestamps(vp); 1231 fuse_internal_cache_attrs(vp, &fao->attr, fao->attr_valid, 1232 fao->attr_valid_nsec, NULL); 1233 } 1234 1235 out: 1236 fdisp_destroy(&fdi); 1237 return err; 1238 } 1239 1240 /* 1241 * FreeBSD clears the SUID and SGID bits on any write by a non-root user. 1242 */ 1243 void 1244 fuse_internal_clear_suid_on_write(struct vnode *vp, struct ucred *cred, 1245 struct thread *td) 1246 { 1247 struct fuse_data *data; 1248 struct mount *mp; 1249 struct vattr va; 1250 int dataflags; 1251 1252 mp = vnode_mount(vp); 1253 data = fuse_get_mpdata(mp); 1254 dataflags = data->dataflags; 1255 1256 ASSERT_VOP_LOCKED(vp, __func__); 1257 1258 if (dataflags & FSESS_DEFAULT_PERMISSIONS) { 1259 if (priv_check_cred(cred, PRIV_VFS_RETAINSUGID)) { 1260 fuse_internal_getattr(vp, &va, cred, td); 1261 if (va.va_mode & (S_ISUID | S_ISGID)) { 1262 mode_t mode = va.va_mode & ~(S_ISUID | S_ISGID); 1263 /* Clear all vattr fields except mode */ 1264 vattr_null(&va); 1265 va.va_mode = mode; 1266 1267 /* 1268 * Ignore fuse_internal_setattr's return value, 1269 * because at this point the write operation has 1270 * already succeeded and we don't want to return 1271 * failing status for that. 1272 */ 1273 (void)fuse_internal_setattr(vp, &va, td, NULL); 1274 } 1275 } 1276 } 1277 } 1278 1279 #ifdef ZERO_PAD_INCOMPLETE_BUFS 1280 static int 1281 isbzero(void *buf, size_t len) 1282 { 1283 int i; 1284 1285 for (i = 0; i < len; i++) { 1286 if (((char *)buf)[i]) 1287 return (0); 1288 } 1289 1290 return (1); 1291 } 1292 1293 #endif 1294 1295 void 1296 fuse_internal_init(void) 1297 { 1298 fuse_lookup_cache_misses = counter_u64_alloc(M_WAITOK); 1299 fuse_lookup_cache_hits = counter_u64_alloc(M_WAITOK); 1300 } 1301 1302 void 1303 fuse_internal_destroy(void) 1304 { 1305 counter_u64_free(fuse_lookup_cache_hits); 1306 counter_u64_free(fuse_lookup_cache_misses); 1307 } 1308