2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2007-2009 Google Inc. and Amit Singh
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
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
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.
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.
33 * Copyright (C) 2005 Csaba Henk.
34 * All rights reserved.
36 * Copyright (c) 2019 The FreeBSD Foundation
38 * Portions of this software were developed by BFF Storage Systems, LLC under
39 * sponsorship from the FreeBSD Foundation.
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
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.
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
63 #include <sys/cdefs.h>
64 __FBSDID("$FreeBSD$");
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>
74 #include <sys/malloc.h>
75 #include <sys/queue.h>
77 #include <sys/mutex.h>
81 #include <sys/mount.h>
82 #include <sys/vnode.h>
83 #include <sys/namei.h>
85 #include <sys/unistd.h>
86 #include <sys/filedesc.h>
88 #include <sys/fcntl.h>
89 #include <sys/dirent.h>
92 #include <sys/sysctl.h>
96 #include "fuse_file.h"
97 #include "fuse_internal.h"
100 #include "fuse_node.h"
101 #include "fuse_file.h"
103 SDT_PROVIDER_DECLARE(fusefs);
106 * arg0: verbosity. Higher numbers give more verbose messages
107 * arg1: Textual message
109 SDT_PROBE_DEFINE2(fusefs, , internal, trace, "int", "char*");
111 #ifdef ZERO_PAD_INCOMPLETE_BUFS
112 static int isbzero(void *buf, size_t len);
116 counter_u64_t fuse_lookup_cache_hits;
117 counter_u64_t fuse_lookup_cache_misses;
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");
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");
126 fuse_internal_get_cached_vnode(struct mount* mp, ino_t ino, int flags,
130 struct thread *td = curthread;
131 uint64_t nodeid = ino;
136 error = vfs_hash_get(mp, fuse_vnode_hash(nodeid), flags, td, vpp,
137 fuse_vnode_cmp, &nodeid);
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
147 if (bintime_cmp(&(VTOFUD(*vpp)->entry_cache_timeout), &now, >)){
148 counter_u64_add(fuse_lookup_cache_hits, 1);
151 /* Entry cache timeout */
152 counter_u64_add(fuse_lookup_cache_misses, 1);
161 /* Synchronously send a FUSE_ACCESS operation */
163 fuse_internal_access(struct vnode *vp,
169 uint32_t mask = F_OK;
173 struct fuse_dispatcher fdi;
174 struct fuse_access_in *fai;
175 struct fuse_data *data;
177 mp = vnode_mount(vp);
178 vtype = vnode_vtype(vp);
180 data = fuse_get_mpdata(mp);
181 dataflags = data->dataflags;
186 if (mode & VMODIFY_PERMS && vfs_isrdonly(mp)) {
187 switch (vp->v_type) {
199 /* Unless explicitly permitted, deny everyone except the fs owner. */
200 if (!(dataflags & FSESS_DAEMON_CAN_SPY)) {
201 if (fuse_match_cred(data->daemoncred, cred))
205 if (dataflags & FSESS_DEFAULT_PERMISSIONS) {
208 fuse_internal_getattr(vp, &va, cred, td);
209 return vaccess(vp->v_type, va.va_mode, va.va_uid,
210 va.va_gid, mode, cred, NULL);
213 if (!fsess_isimpl(mp, FUSE_ACCESS))
216 if ((mode & (VWRITE | VAPPEND | VADMIN)) != 0)
218 if ((mode & VREAD) != 0)
220 if ((mode & VEXEC) != 0)
223 fdisp_init(&fdi, sizeof(*fai));
224 fdisp_make_vp(&fdi, FUSE_ACCESS, vp, td, cred);
229 err = fdisp_wait_answ(&fdi);
233 fsess_set_notimpl(mp, FUSE_ACCESS);
240 * Cache FUSE attributes from attr, in attribute cache associated with vnode
241 * 'vp'. Optionally, if argument 'vap' is not NULL, store a copy of the
242 * converted attributes there as well.
244 * If the nominal attribute cache TTL is zero, do not cache on the 'vp' (but do
245 * return the result to the caller).
248 fuse_internal_cache_attrs(struct vnode *vp, struct fuse_attr *attr,
249 uint64_t attr_valid, uint32_t attr_valid_nsec, struct vattr *vap)
252 struct fuse_vnode_data *fvdat;
253 struct fuse_data *data;
254 struct vattr *vp_cache_at;
256 mp = vnode_mount(vp);
258 data = fuse_get_mpdata(mp);
260 ASSERT_VOP_ELOCKED(vp, "fuse_internal_cache_attrs");
262 fuse_validity_2_bintime(attr_valid, attr_valid_nsec,
263 &fvdat->attr_cache_timeout);
265 /* Fix our buffers if the filesize changed without us knowing */
266 if (vnode_isreg(vp) && attr->size != fvdat->cached_attrs.va_size) {
267 (void)fuse_vnode_setsize(vp, attr->size);
268 fvdat->cached_attrs.va_size = attr->size;
271 if (attr_valid > 0 || attr_valid_nsec > 0)
272 vp_cache_at = &(fvdat->cached_attrs);
273 else if (vap != NULL)
278 vattr_null(vp_cache_at);
279 vp_cache_at->va_fsid = mp->mnt_stat.f_fsid.val[0];
280 vp_cache_at->va_fileid = attr->ino;
281 vp_cache_at->va_mode = attr->mode & ~S_IFMT;
282 vp_cache_at->va_nlink = attr->nlink;
283 vp_cache_at->va_uid = attr->uid;
284 vp_cache_at->va_gid = attr->gid;
285 vp_cache_at->va_rdev = attr->rdev;
286 vp_cache_at->va_size = attr->size;
287 /* XXX on i386, seconds are truncated to 32 bits */
288 vp_cache_at->va_atime.tv_sec = attr->atime;
289 vp_cache_at->va_atime.tv_nsec = attr->atimensec;
290 vp_cache_at->va_mtime.tv_sec = attr->mtime;
291 vp_cache_at->va_mtime.tv_nsec = attr->mtimensec;
292 vp_cache_at->va_ctime.tv_sec = attr->ctime;
293 vp_cache_at->va_ctime.tv_nsec = attr->ctimensec;
294 if (fuse_libabi_geq(data, 7, 9) && attr->blksize > 0)
295 vp_cache_at->va_blocksize = attr->blksize;
297 vp_cache_at->va_blocksize = PAGE_SIZE;
298 vp_cache_at->va_type = IFTOVT(attr->mode);
299 vp_cache_at->va_bytes = attr->blocks * S_BLKSIZE;
300 vp_cache_at->va_flags = 0;
302 if (vap != vp_cache_at && vap != NULL)
303 memcpy(vap, vp_cache_at, sizeof(*vap));
310 fuse_internal_fsync_callback(struct fuse_ticket *tick, struct uio *uio)
312 if (tick->tk_aw_ohead.error == ENOSYS) {
313 fsess_set_notimpl(tick->tk_data->mp, fticket_opcode(tick));
319 fuse_internal_fsync(struct vnode *vp,
324 struct fuse_fsync_in *ffsi = NULL;
325 struct fuse_dispatcher fdi;
326 struct fuse_filehandle *fufh;
327 struct fuse_vnode_data *fvdat = VTOFUD(vp);
328 struct mount *mp = vnode_mount(vp);
332 if (!fsess_isimpl(vnode_mount(vp),
333 (vnode_vtype(vp) == VDIR ? FUSE_FSYNCDIR : FUSE_FSYNC))) {
339 if (!fsess_isimpl(mp, op))
342 fdisp_init(&fdi, sizeof(*ffsi));
344 * fsync every open file handle for this file, because we can't be sure
345 * which file handle the caller is really referring to.
347 LIST_FOREACH(fufh, &fvdat->handles, next) {
349 fdisp_make_vp(&fdi, op, vp, td, NULL);
351 fdisp_refresh_vp(&fdi, op, vp, td, NULL);
353 ffsi->fh = fufh->fh_id;
354 ffsi->fsync_flags = 0;
357 ffsi->fsync_flags = 1;
359 if (waitfor == MNT_WAIT) {
360 err = fdisp_wait_answ(&fdi);
362 fuse_insert_callback(fdi.tick,
363 fuse_internal_fsync_callback);
364 fuse_insert_message(fdi.tick, false);
367 /* ENOSYS means "success, and don't call again" */
368 fsess_set_notimpl(mp, op);
378 /* Asynchronous invalidation */
379 SDT_PROBE_DEFINE2(fusefs, , internal, invalidate_cache_hit,
380 "struct vnode*", "struct vnode*");
382 fuse_internal_invalidate_entry(struct mount *mp, struct uio *uio)
384 struct fuse_notify_inval_entry_out fnieo;
385 struct componentname cn;
386 struct vnode *dvp, *vp;
390 if ((err = uiomove(&fnieo, sizeof(fnieo), uio)) != 0)
393 if (fnieo.namelen >= sizeof(name))
396 if ((err = uiomove(name, fnieo.namelen, uio)) != 0)
398 name[fnieo.namelen] = '\0';
399 /* fusefs does not cache "." or ".." entries */
400 if (strncmp(name, ".", sizeof(".")) == 0 ||
401 strncmp(name, "..", sizeof("..")) == 0)
404 if (fnieo.parent == FUSE_ROOT_ID)
405 err = VFS_ROOT(mp, LK_SHARED, &dvp);
407 err = fuse_internal_get_cached_vnode( mp, fnieo.parent,
410 * If dvp is not in the cache, then it must've been reclaimed. And
411 * since fuse_vnop_reclaim does a cache_purge, name's entry must've
412 * been invalidated already. So we can safely return if dvp == NULL
414 if (err != 0 || dvp == NULL)
417 * XXX we can't check dvp's generation because the FUSE invalidate
418 * entry message doesn't include it. Worse case is that we invalidate
419 * an entry that didn't need to be invalidated.
422 cn.cn_nameiop = LOOKUP;
423 cn.cn_flags = 0; /* !MAKEENTRY means free cached entry */
424 cn.cn_thread = curthread;
425 cn.cn_cred = curthread->td_ucred;
426 cn.cn_lkflags = LK_SHARED;
428 cn.cn_nameptr = name;
429 cn.cn_namelen = fnieo.namelen;
430 err = cache_lookup(dvp, &vp, &cn, NULL, NULL);
432 fuse_vnode_clear_attr_cache(dvp);
438 fuse_internal_invalidate_inode(struct mount *mp, struct uio *uio)
440 struct fuse_notify_inval_inode_out fniio;
444 if ((err = uiomove(&fniio, sizeof(fniio), uio)) != 0)
447 if (fniio.ino == FUSE_ROOT_ID)
448 err = VFS_ROOT(mp, LK_EXCLUSIVE, &vp);
450 err = fuse_internal_get_cached_vnode(mp, fniio.ino, LK_SHARED,
452 if (err != 0 || vp == NULL)
455 * XXX we can't check vp's generation because the FUSE invalidate
456 * entry message doesn't include it. Worse case is that we invalidate
457 * an inode that didn't need to be invalidated.
461 * Flush and invalidate buffers if off >= 0. Technically we only need
462 * to flush and invalidate the range of offsets [off, off + len), but
463 * for simplicity's sake we do everything.
466 fuse_io_invalbuf(vp, curthread);
467 fuse_vnode_clear_attr_cache(vp);
474 fuse_internal_mknod(struct vnode *dvp, struct vnode **vpp,
475 struct componentname *cnp, struct vattr *vap)
477 struct fuse_data *data;
478 struct fuse_mknod_in fmni;
481 data = fuse_get_mpdata(dvp->v_mount);
483 fmni.mode = MAKEIMODE(vap->va_type, vap->va_mode);
484 fmni.rdev = vap->va_rdev;
485 if (fuse_libabi_geq(data, 7, 12)) {
486 insize = sizeof(fmni);
487 fmni.umask = curthread->td_proc->p_fd->fd_cmask;
489 insize = FUSE_COMPAT_MKNOD_IN_SIZE;
491 return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKNOD, &fmni,
492 insize, vap->va_type));
498 fuse_internal_readdir(struct vnode *vp,
501 struct fuse_filehandle *fufh,
502 struct fuse_iov *cookediov,
507 struct fuse_dispatcher fdi;
508 struct fuse_read_in *fri = NULL;
511 if (uio_resid(uio) == 0)
516 * Note that we DO NOT have a UIO_SYSSPACE here (so no need for p2p
521 * fnd_start is set non-zero once the offset in the directory gets
522 * to the startoff. This is done because directories must be read
523 * from the beginning (offset == 0) when fuse_vnop_readdir() needs
524 * to do an open of the directory.
525 * If it is not set non-zero here, it will be set non-zero in
526 * fuse_internal_readdir_processdata() when uio_offset == startoff.
529 if (uio->uio_offset == startoff)
531 while (uio_resid(uio) > 0) {
532 fdi.iosize = sizeof(*fri);
534 fdisp_make_vp(&fdi, FUSE_READDIR, vp, NULL, NULL);
536 fdisp_refresh_vp(&fdi, FUSE_READDIR, vp, NULL, NULL);
539 fri->fh = fufh->fh_id;
540 fri->offset = uio_offset(uio);
541 fri->size = MIN(uio->uio_resid,
542 fuse_get_mpdata(vp->v_mount)->max_read);
544 if ((err = fdisp_wait_answ(&fdi)))
546 if ((err = fuse_internal_readdir_processdata(uio, startoff,
547 &fnd_start, fri->size, fdi.answ, fdi.iosize, cookediov,
548 ncookies, &cookies)))
553 return ((err == -1) ? 0 : err);
557 * Return -1 to indicate that this readdir is finished, 0 if it copied
558 * all the directory data read in and it may be possible to read more
559 * and greater than 0 for a failure.
562 fuse_internal_readdir_processdata(struct uio *uio,
568 struct fuse_iov *cookediov,
577 struct fuse_dirent *fudge;
581 if (bufsize < FUSE_NAME_OFFSET)
584 if (bufsize < FUSE_NAME_OFFSET) {
588 fudge = (struct fuse_dirent *)buf;
589 freclen = FUSE_DIRENT_SIZE(fudge);
591 if (bufsize < freclen) {
593 * This indicates a partial directory entry at the
594 * end of the directory data.
599 #ifdef ZERO_PAD_INCOMPLETE_BUFS
600 if (isbzero(buf, FUSE_NAME_OFFSET)) {
606 if (!fudge->namelen || fudge->namelen > MAXNAMLEN) {
610 bytesavail = GENERIC_DIRSIZ((struct pseudo_dirent *)
613 if (bytesavail > uio_resid(uio)) {
614 /* Out of space for the dir so we are done. */
619 * Don't start to copy the directory entries out until
620 * the requested offset in the directory is found.
622 if (*fnd_start != 0) {
623 fiov_adjust(cookediov, bytesavail);
624 bzero(cookediov->base, bytesavail);
626 de = (struct dirent *)cookediov->base;
627 de->d_fileno = fudge->ino;
628 de->d_reclen = bytesavail;
629 de->d_type = fudge->type;
630 de->d_namlen = fudge->namelen;
631 memcpy((char *)cookediov->base + sizeof(struct dirent) -
633 (char *)buf + FUSE_NAME_OFFSET, fudge->namelen);
634 dirent_terminate(de);
636 err = uiomove(cookediov->base, cookediov->len, uio);
639 if (cookies != NULL) {
640 if (*ncookies == 0) {
644 *cookies = fudge->off;
648 } else if (startoff == fudge->off)
650 buf = (char *)buf + freclen;
652 uio_setoffset(uio, fudge->off);
662 fuse_internal_remove(struct vnode *dvp,
664 struct componentname *cnp,
667 struct fuse_dispatcher fdi;
671 fdisp_init(&fdi, cnp->cn_namelen + 1);
672 fdisp_make_vp(&fdi, op, dvp, cnp->cn_thread, cnp->cn_cred);
674 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
675 ((char *)fdi.indata)[cnp->cn_namelen] = '\0';
677 err = fdisp_wait_answ(&fdi);
684 * Access the cached nlink even if the attr cached has expired. If
685 * it's inaccurate, the worst that will happen is:
686 * 1) We'll recycle the vnode even though the file has another link we
687 * don't know about, costing a bit of cpu time, or
688 * 2) We won't recycle the vnode even though all of its links are gone.
689 * It will linger around until vnlru reclaims it, costing a bit of
692 nlink = VTOFUD(vp)->cached_attrs.va_nlink--;
695 * Purge the parent's attribute cache because the daemon
696 * should've updated its mtime and ctime.
698 fuse_vnode_clear_attr_cache(dvp);
700 /* NB: nlink could be zero if it was never cached */
701 if (nlink <= 1 || vnode_vtype(vp) == VDIR) {
702 fuse_internal_vnode_disappear(vp);
705 fuse_vnode_update(vp, FN_CTIMECHANGE);
714 fuse_internal_rename(struct vnode *fdvp,
715 struct componentname *fcnp,
717 struct componentname *tcnp)
719 struct fuse_dispatcher fdi;
720 struct fuse_rename_in *fri;
723 fdisp_init(&fdi, sizeof(*fri) + fcnp->cn_namelen + tcnp->cn_namelen + 2);
724 fdisp_make_vp(&fdi, FUSE_RENAME, fdvp, tcnp->cn_thread, tcnp->cn_cred);
727 fri->newdir = VTOI(tdvp);
728 memcpy((char *)fdi.indata + sizeof(*fri), fcnp->cn_nameptr,
730 ((char *)fdi.indata)[sizeof(*fri) + fcnp->cn_namelen] = '\0';
731 memcpy((char *)fdi.indata + sizeof(*fri) + fcnp->cn_namelen + 1,
732 tcnp->cn_nameptr, tcnp->cn_namelen);
733 ((char *)fdi.indata)[sizeof(*fri) + fcnp->cn_namelen +
734 tcnp->cn_namelen + 1] = '\0';
736 err = fdisp_wait_answ(&fdi);
743 /* entity creation */
746 fuse_internal_newentry_makerequest(struct mount *mp,
748 struct componentname *cnp,
752 struct fuse_dispatcher *fdip)
754 fdip->iosize = bufsize + cnp->cn_namelen + 1;
756 fdisp_make(fdip, op, mp, dnid, cnp->cn_thread, cnp->cn_cred);
757 memcpy(fdip->indata, buf, bufsize);
758 memcpy((char *)fdip->indata + bufsize, cnp->cn_nameptr, cnp->cn_namelen);
759 ((char *)fdip->indata)[bufsize + cnp->cn_namelen] = '\0';
763 fuse_internal_newentry_core(struct vnode *dvp,
765 struct componentname *cnp,
767 struct fuse_dispatcher *fdip)
770 struct fuse_entry_out *feo;
771 struct mount *mp = vnode_mount(dvp);
773 if ((err = fdisp_wait_answ(fdip))) {
778 if ((err = fuse_internal_checkentry(feo, vtyp))) {
781 err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, vtyp);
783 fuse_internal_forget_send(mp, cnp->cn_thread, cnp->cn_cred,
789 * Purge the parent's attribute cache because the daemon should've
790 * updated its mtime and ctime
792 fuse_vnode_clear_attr_cache(dvp);
794 fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid,
795 feo->attr_valid_nsec, NULL);
801 fuse_internal_newentry(struct vnode *dvp,
803 struct componentname *cnp,
810 struct fuse_dispatcher fdi;
811 struct mount *mp = vnode_mount(dvp);
814 fuse_internal_newentry_makerequest(mp, VTOI(dvp), cnp, op, buf,
816 err = fuse_internal_newentry_core(dvp, vpp, cnp, vtype, &fdi);
822 /* entity destruction */
825 fuse_internal_forget_callback(struct fuse_ticket *ftick, struct uio *uio)
827 fuse_internal_forget_send(ftick->tk_data->mp, curthread, NULL,
828 ((struct fuse_in_header *)ftick->tk_ms_fiov.base)->nodeid, 1);
834 fuse_internal_forget_send(struct mount *mp,
841 struct fuse_dispatcher fdi;
842 struct fuse_forget_in *ffi;
845 * KASSERT(nlookup > 0, ("zero-times forget for vp #%llu",
846 * (long long unsigned) nodeid));
849 fdisp_init(&fdi, sizeof(*ffi));
850 fdisp_make(&fdi, FUSE_FORGET, mp, nodeid, td, cred);
853 ffi->nlookup = nlookup;
855 fuse_insert_message(fdi.tick, false);
859 /* Fetch the vnode's attributes from the daemon*/
861 fuse_internal_do_getattr(struct vnode *vp, struct vattr *vap,
862 struct ucred *cred, struct thread *td)
864 struct fuse_dispatcher fdi;
865 struct fuse_vnode_data *fvdat = VTOFUD(vp);
866 struct fuse_getattr_in *fgai;
867 struct fuse_attr_out *fao;
868 off_t old_filesize = fvdat->cached_attrs.va_size;
869 struct timespec old_ctime = fvdat->cached_attrs.va_ctime;
870 struct timespec old_mtime = fvdat->cached_attrs.va_mtime;
874 fdisp_init(&fdi, sizeof(*fgai));
875 fdisp_make_vp(&fdi, FUSE_GETATTR, vp, td, cred);
878 * We could look up a file handle and set it in fgai->fh, but that
879 * involves extra runtime work and I'm unaware of any file systems that
882 fgai->getattr_flags = 0;
883 if ((err = fdisp_wait_answ(&fdi))) {
885 fuse_internal_vnode_disappear(vp);
889 fao = (struct fuse_attr_out *)fdi.answ;
890 vtyp = IFTOVT(fao->attr.mode);
891 if (fvdat->flag & FN_SIZECHANGE)
892 fao->attr.size = old_filesize;
893 if (fvdat->flag & FN_CTIMECHANGE) {
894 fao->attr.ctime = old_ctime.tv_sec;
895 fao->attr.ctimensec = old_ctime.tv_nsec;
897 if (fvdat->flag & FN_MTIMECHANGE) {
898 fao->attr.mtime = old_mtime.tv_sec;
899 fao->attr.mtimensec = old_mtime.tv_nsec;
901 fuse_internal_cache_attrs(vp, &fao->attr, fao->attr_valid,
902 fao->attr_valid_nsec, vap);
903 if (vtyp != vnode_vtype(vp)) {
904 fuse_internal_vnode_disappear(vp);
913 /* Read a vnode's attributes from cache or fetch them from the fuse daemon */
915 fuse_internal_getattr(struct vnode *vp, struct vattr *vap, struct ucred *cred,
920 if ((attrs = VTOVA(vp)) != NULL) {
921 *vap = *attrs; /* struct copy */
925 return fuse_internal_do_getattr(vp, vap, cred, td);
929 fuse_internal_vnode_disappear(struct vnode *vp)
931 struct fuse_vnode_data *fvdat = VTOFUD(vp);
933 ASSERT_VOP_ELOCKED(vp, "fuse_internal_vnode_disappear");
934 fvdat->flag |= FN_REVOKED;
938 /* fuse start/stop */
941 fuse_internal_init_callback(struct fuse_ticket *tick, struct uio *uio)
944 struct fuse_data *data = tick->tk_data;
945 struct fuse_init_out *fiio;
947 if ((err = tick->tk_aw_ohead.error)) {
950 if ((err = fticket_pull(tick, uio))) {
953 fiio = fticket_resp(tick)->base;
955 data->fuse_libabi_major = fiio->major;
956 data->fuse_libabi_minor = fiio->minor;
957 if (!fuse_libabi_geq(data, 7, 4)) {
959 * With a little work we could support servers as old as 7.1.
960 * But there would be little payoff.
962 SDT_PROBE2(fusefs, , internal, trace, 1,
963 "userpace version too low");
964 err = EPROTONOSUPPORT;
968 if (fuse_libabi_geq(data, 7, 5)) {
969 if (fticket_resp(tick)->len == sizeof(struct fuse_init_out) ||
970 fticket_resp(tick)->len == FUSE_COMPAT_22_INIT_OUT_SIZE) {
971 data->max_write = fiio->max_write;
972 if (fiio->flags & FUSE_ASYNC_READ)
973 data->dataflags |= FSESS_ASYNC_READ;
974 if (fiio->flags & FUSE_POSIX_LOCKS)
975 data->dataflags |= FSESS_POSIX_LOCKS;
976 if (fiio->flags & FUSE_EXPORT_SUPPORT)
977 data->dataflags |= FSESS_EXPORT_SUPPORT;
979 * Don't bother to check FUSE_BIG_WRITES, because it's
980 * redundant with max_write
983 * max_background and congestion_threshold are not
990 /* Old fixed values */
991 data->max_write = 4096;
994 if (fuse_libabi_geq(data, 7, 6))
995 data->max_readahead_blocks = fiio->max_readahead / maxbcachebuf;
997 if (!fuse_libabi_geq(data, 7, 7))
998 fsess_set_notimpl(data->mp, FUSE_INTERRUPT);
1000 if (!fuse_libabi_geq(data, 7, 8)) {
1001 fsess_set_notimpl(data->mp, FUSE_BMAP);
1002 fsess_set_notimpl(data->mp, FUSE_DESTROY);
1005 if (fuse_libabi_geq(data, 7, 23) && fiio->time_gran >= 1 &&
1006 fiio->time_gran <= 1000000000)
1007 data->time_gran = fiio->time_gran;
1009 data->time_gran = 1;
1011 if (!fuse_libabi_geq(data, 7, 23))
1012 data->cache_mode = fuse_data_cache_mode;
1013 else if (fiio->flags & FUSE_WRITEBACK_CACHE)
1014 data->cache_mode = FUSE_CACHE_WB;
1016 data->cache_mode = FUSE_CACHE_WT;
1020 fdata_set_dead(data);
1023 data->dataflags |= FSESS_INITED;
1024 wakeup(&data->ticketer);
1031 fuse_internal_send_init(struct fuse_data *data, struct thread *td)
1033 struct fuse_init_in *fiii;
1034 struct fuse_dispatcher fdi;
1036 fdisp_init(&fdi, sizeof(*fiii));
1037 fdisp_make(&fdi, FUSE_INIT, data->mp, 0, td, NULL);
1039 fiii->major = FUSE_KERNEL_VERSION;
1040 fiii->minor = FUSE_KERNEL_MINOR_VERSION;
1042 * fusefs currently reads ahead no more than one cache block at a time.
1043 * See fuse_read_biobackend
1045 fiii->max_readahead = maxbcachebuf;
1047 * Unsupported features:
1048 * FUSE_FILE_OPS: No known FUSE server or client supports it
1049 * FUSE_ATOMIC_O_TRUNC: our VFS cannot support it
1050 * FUSE_DONT_MASK: unlike Linux, FreeBSD always applies the umask, even
1051 * when default ACLs are in use.
1052 * FUSE_SPLICE_WRITE, FUSE_SPLICE_MOVE, FUSE_SPLICE_READ: FreeBSD
1053 * doesn't have splice(2).
1054 * FUSE_FLOCK_LOCKS: not yet implemented
1055 * FUSE_HAS_IOCTL_DIR: not yet implemented
1056 * FUSE_AUTO_INVAL_DATA: not yet implemented
1057 * FUSE_DO_READDIRPLUS: not yet implemented
1058 * FUSE_READDIRPLUS_AUTO: not yet implemented
1059 * FUSE_ASYNC_DIO: not yet implemented
1060 * FUSE_NO_OPEN_SUPPORT: not yet implemented
1062 fiii->flags = FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_EXPORT_SUPPORT
1063 | FUSE_BIG_WRITES | FUSE_WRITEBACK_CACHE;
1065 fuse_insert_callback(fdi.tick, fuse_internal_init_callback);
1066 fuse_insert_message(fdi.tick, false);
1067 fdisp_destroy(&fdi);
1071 * Send a FUSE_SETATTR operation with no permissions checks. If cred is NULL,
1072 * send the request with root credentials
1074 int fuse_internal_setattr(struct vnode *vp, struct vattr *vap,
1075 struct thread *td, struct ucred *cred)
1077 struct fuse_vnode_data *fvdat;
1078 struct fuse_dispatcher fdi;
1079 struct fuse_setattr_in *fsai;
1081 pid_t pid = td->td_proc->p_pid;
1082 struct fuse_data *data;
1086 int sizechanged = -1;
1087 uint64_t newsize = 0;
1089 mp = vnode_mount(vp);
1091 data = fuse_get_mpdata(mp);
1092 dataflags = data->dataflags;
1094 fdisp_init(&fdi, sizeof(*fsai));
1095 fdisp_make_vp(&fdi, FUSE_SETATTR, vp, td, cred);
1103 if (vap->va_uid != (uid_t)VNOVAL) {
1104 fsai->uid = vap->va_uid;
1105 fsai->valid |= FATTR_UID;
1107 if (vap->va_gid != (gid_t)VNOVAL) {
1108 fsai->gid = vap->va_gid;
1109 fsai->valid |= FATTR_GID;
1111 if (vap->va_size != VNOVAL) {
1112 struct fuse_filehandle *fufh = NULL;
1114 /*Truncate to a new value. */
1115 fsai->size = vap->va_size;
1117 newsize = vap->va_size;
1118 fsai->valid |= FATTR_SIZE;
1120 fuse_filehandle_getrw(vp, FWRITE, &fufh, cred, pid);
1122 fsai->fh = fufh->fh_id;
1123 fsai->valid |= FATTR_FH;
1125 VTOFUD(vp)->flag &= ~FN_SIZECHANGE;
1127 if (vap->va_atime.tv_sec != VNOVAL) {
1128 fsai->atime = vap->va_atime.tv_sec;
1129 fsai->atimensec = vap->va_atime.tv_nsec;
1130 fsai->valid |= FATTR_ATIME;
1131 if (vap->va_vaflags & VA_UTIMES_NULL)
1132 fsai->valid |= FATTR_ATIME_NOW;
1134 if (vap->va_mtime.tv_sec != VNOVAL) {
1135 fsai->mtime = vap->va_mtime.tv_sec;
1136 fsai->mtimensec = vap->va_mtime.tv_nsec;
1137 fsai->valid |= FATTR_MTIME;
1138 if (vap->va_vaflags & VA_UTIMES_NULL)
1139 fsai->valid |= FATTR_MTIME_NOW;
1140 } else if (fvdat->flag & FN_MTIMECHANGE) {
1141 fsai->mtime = fvdat->cached_attrs.va_mtime.tv_sec;
1142 fsai->mtimensec = fvdat->cached_attrs.va_mtime.tv_nsec;
1143 fsai->valid |= FATTR_MTIME;
1145 if (fuse_libabi_geq(data, 7, 23) && fvdat->flag & FN_CTIMECHANGE) {
1146 fsai->ctime = fvdat->cached_attrs.va_ctime.tv_sec;
1147 fsai->ctimensec = fvdat->cached_attrs.va_ctime.tv_nsec;
1148 fsai->valid |= FATTR_CTIME;
1150 if (vap->va_mode != (mode_t)VNOVAL) {
1151 fsai->mode = vap->va_mode & ALLPERMS;
1152 fsai->valid |= FATTR_MODE;
1158 if ((err = fdisp_wait_answ(&fdi)))
1160 vtyp = IFTOVT(((struct fuse_attr_out *)fdi.answ)->attr.mode);
1162 if (vnode_vtype(vp) != vtyp) {
1163 if (vnode_vtype(vp) == VNON && vtyp != VNON) {
1164 SDT_PROBE2(fusefs, , internal, trace, 1, "FUSE: Dang! "
1165 "vnode_vtype is VNON and vtype isn't.");
1168 * STALE vnode, ditch
1170 * The vnode has changed its type "behind our back".
1171 * There's nothing really we can do, so let us just
1172 * force an internal revocation and tell the caller to
1173 * try again, if interested.
1175 fuse_internal_vnode_disappear(vp);
1180 struct fuse_attr_out *fao = (struct fuse_attr_out*)fdi.answ;
1181 fuse_vnode_undirty_cached_timestamps(vp);
1182 fuse_internal_cache_attrs(vp, &fao->attr, fao->attr_valid,
1183 fao->attr_valid_nsec, NULL);
1187 fdisp_destroy(&fdi);
1191 #ifdef ZERO_PAD_INCOMPLETE_BUFS
1193 isbzero(void *buf, size_t len)
1197 for (i = 0; i < len; i++) {
1198 if (((char *)buf)[i])
1208 fuse_internal_init(void)
1210 fuse_lookup_cache_misses = counter_u64_alloc(M_WAITOK);
1211 fuse_lookup_cache_hits = counter_u64_alloc(M_WAITOK);
1215 fuse_internal_destroy(void)
1217 counter_u64_free(fuse_lookup_cache_hits);
1218 counter_u64_free(fuse_lookup_cache_misses);