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/module.h>
68 #include <sys/systm.h>
69 #include <sys/errno.h>
70 #include <sys/kernel.h>
72 #include <sys/filio.h>
74 #include <sys/malloc.h>
75 #include <sys/queue.h>
76 #include <sys/limits.h>
78 #include <sys/rwlock.h>
81 #include <sys/mount.h>
82 #include <sys/vnode.h>
83 #include <sys/namei.h>
84 #include <sys/extattr.h>
86 #include <sys/unistd.h>
87 #include <sys/filedesc.h>
89 #include <sys/fcntl.h>
90 #include <sys/dirent.h>
93 #include <sys/sysctl.h>
94 #include <sys/vmmeter.h>
97 #include <vm/vm_extern.h>
99 #include <vm/vm_map.h>
100 #include <vm/vm_page.h>
101 #include <vm/vm_param.h>
102 #include <vm/vm_object.h>
103 #include <vm/vm_pager.h>
104 #include <vm/vnode_pager.h>
105 #include <vm/vm_object.h>
108 #include "fuse_file.h"
109 #include "fuse_internal.h"
110 #include "fuse_ipc.h"
111 #include "fuse_node.h"
114 #include <sys/priv.h>
116 /* Maximum number of hardlinks to a single FUSE file */
117 #define FUSE_LINK_MAX UINT32_MAX
119 SDT_PROVIDER_DECLARE(fusefs);
122 * arg0: verbosity. Higher numbers give more verbose messages
123 * arg1: Textual message
125 SDT_PROBE_DEFINE2(fusefs, , vnops, trace, "int", "char*");
128 static vop_access_t fuse_vnop_access;
129 static vop_advlock_t fuse_vnop_advlock;
130 static vop_allocate_t fuse_vnop_allocate;
131 static vop_bmap_t fuse_vnop_bmap;
132 static vop_close_t fuse_fifo_close;
133 static vop_close_t fuse_vnop_close;
134 static vop_copy_file_range_t fuse_vnop_copy_file_range;
135 static vop_create_t fuse_vnop_create;
136 static vop_deallocate_t fuse_vnop_deallocate;
137 static vop_deleteextattr_t fuse_vnop_deleteextattr;
138 static vop_fdatasync_t fuse_vnop_fdatasync;
139 static vop_fsync_t fuse_vnop_fsync;
140 static vop_getattr_t fuse_vnop_getattr;
141 static vop_getextattr_t fuse_vnop_getextattr;
142 static vop_inactive_t fuse_vnop_inactive;
143 static vop_ioctl_t fuse_vnop_ioctl;
144 static vop_link_t fuse_vnop_link;
145 static vop_listextattr_t fuse_vnop_listextattr;
146 static vop_lookup_t fuse_vnop_lookup;
147 static vop_mkdir_t fuse_vnop_mkdir;
148 static vop_mknod_t fuse_vnop_mknod;
149 static vop_open_t fuse_vnop_open;
150 static vop_pathconf_t fuse_vnop_pathconf;
151 static vop_read_t fuse_vnop_read;
152 static vop_readdir_t fuse_vnop_readdir;
153 static vop_readlink_t fuse_vnop_readlink;
154 static vop_reclaim_t fuse_vnop_reclaim;
155 static vop_remove_t fuse_vnop_remove;
156 static vop_rename_t fuse_vnop_rename;
157 static vop_rmdir_t fuse_vnop_rmdir;
158 static vop_setattr_t fuse_vnop_setattr;
159 static vop_setextattr_t fuse_vnop_setextattr;
160 static vop_strategy_t fuse_vnop_strategy;
161 static vop_symlink_t fuse_vnop_symlink;
162 static vop_write_t fuse_vnop_write;
163 static vop_getpages_t fuse_vnop_getpages;
164 static vop_print_t fuse_vnop_print;
165 static vop_vptofh_t fuse_vnop_vptofh;
167 struct vop_vector fuse_fifoops = {
168 .vop_default = &fifo_specops,
169 .vop_access = fuse_vnop_access,
170 .vop_close = fuse_fifo_close,
171 .vop_fsync = fuse_vnop_fsync,
172 .vop_getattr = fuse_vnop_getattr,
173 .vop_inactive = fuse_vnop_inactive,
174 .vop_pathconf = fuse_vnop_pathconf,
175 .vop_print = fuse_vnop_print,
176 .vop_read = VOP_PANIC,
177 .vop_reclaim = fuse_vnop_reclaim,
178 .vop_setattr = fuse_vnop_setattr,
179 .vop_write = VOP_PANIC,
180 .vop_vptofh = fuse_vnop_vptofh,
182 VFS_VOP_VECTOR_REGISTER(fuse_fifoops);
184 struct vop_vector fuse_vnops = {
185 .vop_allocate = fuse_vnop_allocate,
186 .vop_default = &default_vnodeops,
187 .vop_access = fuse_vnop_access,
188 .vop_advlock = fuse_vnop_advlock,
189 .vop_bmap = fuse_vnop_bmap,
190 .vop_close = fuse_vnop_close,
191 .vop_copy_file_range = fuse_vnop_copy_file_range,
192 .vop_create = fuse_vnop_create,
193 .vop_deallocate = fuse_vnop_deallocate,
194 .vop_deleteextattr = fuse_vnop_deleteextattr,
195 .vop_fsync = fuse_vnop_fsync,
196 .vop_fdatasync = fuse_vnop_fdatasync,
197 .vop_getattr = fuse_vnop_getattr,
198 .vop_getextattr = fuse_vnop_getextattr,
199 .vop_inactive = fuse_vnop_inactive,
200 .vop_ioctl = fuse_vnop_ioctl,
201 .vop_link = fuse_vnop_link,
202 .vop_listextattr = fuse_vnop_listextattr,
203 .vop_lookup = fuse_vnop_lookup,
204 .vop_mkdir = fuse_vnop_mkdir,
205 .vop_mknod = fuse_vnop_mknod,
206 .vop_open = fuse_vnop_open,
207 .vop_pathconf = fuse_vnop_pathconf,
209 * TODO: implement vop_poll after upgrading to protocol 7.21.
210 * FUSE_POLL was added in protocol 7.11, but it's kind of broken until
211 * 7.21, which adds the ability for the client to choose which poll
212 * events it wants, and for a client to deregister a file handle
214 .vop_read = fuse_vnop_read,
215 .vop_readdir = fuse_vnop_readdir,
216 .vop_readlink = fuse_vnop_readlink,
217 .vop_reclaim = fuse_vnop_reclaim,
218 .vop_remove = fuse_vnop_remove,
219 .vop_rename = fuse_vnop_rename,
220 .vop_rmdir = fuse_vnop_rmdir,
221 .vop_setattr = fuse_vnop_setattr,
222 .vop_setextattr = fuse_vnop_setextattr,
223 .vop_strategy = fuse_vnop_strategy,
224 .vop_symlink = fuse_vnop_symlink,
225 .vop_write = fuse_vnop_write,
226 .vop_getpages = fuse_vnop_getpages,
227 .vop_print = fuse_vnop_print,
228 .vop_vptofh = fuse_vnop_vptofh,
230 VFS_VOP_VECTOR_REGISTER(fuse_vnops);
232 uma_zone_t fuse_pbuf_zone;
234 /* Check permission for extattr operations, much like extattr_check_cred */
236 fuse_extattr_check_cred(struct vnode *vp, int ns, struct ucred *cred,
237 struct thread *td, accmode_t accmode)
239 struct mount *mp = vnode_mount(vp);
240 struct fuse_data *data = fuse_get_mpdata(mp);
241 int default_permissions = data->dataflags & FSESS_DEFAULT_PERMISSIONS;
244 * Kernel-invoked always succeeds.
250 * Do not allow privileged processes in jail to directly manipulate
254 case EXTATTR_NAMESPACE_SYSTEM:
255 if (default_permissions) {
256 return (priv_check_cred(cred, PRIV_VFS_EXTATTR_SYSTEM));
259 case EXTATTR_NAMESPACE_USER:
260 if (default_permissions) {
261 return (fuse_internal_access(vp, accmode, td, cred));
269 /* Get a filehandle for a directory */
271 fuse_filehandle_get_dir(struct vnode *vp, struct fuse_filehandle **fufhp,
272 struct ucred *cred, pid_t pid)
274 if (fuse_filehandle_get(vp, FREAD, fufhp, cred, pid) == 0)
276 return fuse_filehandle_get(vp, FEXEC, fufhp, cred, pid);
279 /* Send FUSE_FLUSH for this vnode */
281 fuse_flush(struct vnode *vp, struct ucred *cred, pid_t pid, int fflag)
283 struct fuse_flush_in *ffi;
284 struct fuse_filehandle *fufh;
285 struct fuse_dispatcher fdi;
286 struct thread *td = curthread;
287 struct mount *mp = vnode_mount(vp);
290 if (fsess_not_impl(vnode_mount(vp), FUSE_FLUSH))
293 err = fuse_filehandle_getrw(vp, fflag, &fufh, cred, pid);
297 fdisp_init(&fdi, sizeof(*ffi));
298 fdisp_make_vp(&fdi, FUSE_FLUSH, vp, td, cred);
300 ffi->fh = fufh->fh_id;
302 * If the file has a POSIX lock then we're supposed to set lock_owner.
303 * If not, then lock_owner is undefined. So we may as well always set
306 ffi->lock_owner = td->td_proc->p_pid;
308 err = fdisp_wait_answ(&fdi);
310 fsess_set_notimpl(mp, FUSE_FLUSH);
317 /* Close wrapper for fifos. */
319 fuse_fifo_close(struct vop_close_args *ap)
321 return (fifo_specops.vop_close(ap));
324 /* Invalidate a range of cached data, whether dirty of not */
326 fuse_inval_buf_range(struct vnode *vp, off_t filesize, off_t start, off_t end)
329 daddr_t left_lbn, end_lbn, right_lbn;
331 int iosize, left_on, right_on, right_blksize;
333 iosize = fuse_iosize(vp);
334 left_lbn = start / iosize;
335 end_lbn = howmany(end, iosize);
336 left_on = start & (iosize - 1);
338 bp = getblk(vp, left_lbn, iosize, PCATCH, 0, 0);
339 if ((bp->b_flags & B_CACHE) != 0 && bp->b_dirtyend >= left_on) {
341 * Flush the dirty buffer, because we don't have a
342 * byte-granular way to record which parts of the
347 return (bp->b_error);
352 right_on = end & (iosize - 1);
354 right_lbn = end / iosize;
355 new_filesize = MAX(filesize, end);
356 right_blksize = MIN(iosize, new_filesize - iosize * right_lbn);
357 bp = getblk(vp, right_lbn, right_blksize, PCATCH, 0, 0);
358 if ((bp->b_flags & B_CACHE) != 0 && bp->b_dirtyoff < right_on) {
360 * Flush the dirty buffer, because we don't have a
361 * byte-granular way to record which parts of the
366 return (bp->b_error);
372 v_inval_buf_range(vp, left_lbn, end_lbn, iosize);
377 /* Send FUSE_LSEEK for this node */
379 fuse_vnop_do_lseek(struct vnode *vp, struct thread *td, struct ucred *cred,
380 pid_t pid, off_t *offp, int whence)
382 struct fuse_dispatcher fdi;
383 struct fuse_filehandle *fufh;
384 struct fuse_lseek_in *flsi;
385 struct fuse_lseek_out *flso;
386 struct mount *mp = vnode_mount(vp);
389 ASSERT_VOP_LOCKED(vp, __func__);
391 err = fuse_filehandle_getrw(vp, FREAD, &fufh, cred, pid);
394 fdisp_init(&fdi, sizeof(*flsi));
395 fdisp_make_vp(&fdi, FUSE_LSEEK, vp, td, cred);
397 flsi->fh = fufh->fh_id;
398 flsi->offset = *offp;
399 flsi->whence = whence;
400 err = fdisp_wait_answ(&fdi);
402 fsess_set_notimpl(mp, FUSE_LSEEK);
403 } else if (err == 0) {
404 fsess_set_impl(mp, FUSE_LSEEK);
406 *offp = flso->offset;
414 struct vnop_access_args {
416 #if VOP_ACCESS_TAKES_ACCMODE_T
421 struct ucred *a_cred;
426 fuse_vnop_access(struct vop_access_args *ap)
428 struct vnode *vp = ap->a_vp;
429 int accmode = ap->a_accmode;
430 struct ucred *cred = ap->a_cred;
432 struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
436 if (fuse_isdeadfs(vp)) {
437 if (vnode_isvroot(vp)) {
442 if (!(data->dataflags & FSESS_INITED)) {
443 if (vnode_isvroot(vp)) {
444 if (priv_check_cred(cred, PRIV_VFS_ADMIN) ||
445 (fuse_match_cred(data->daemoncred, cred) == 0)) {
451 if (vnode_islnk(vp)) {
455 err = fuse_internal_access(vp, accmode, ap->a_td, ap->a_cred);
460 * struct vop_advlock_args {
461 * struct vop_generic_args a_gen;
462 * struct vnode *a_vp;
465 * struct flock *a_fl;
470 fuse_vnop_advlock(struct vop_advlock_args *ap)
472 struct vnode *vp = ap->a_vp;
473 struct flock *fl = ap->a_fl;
474 struct thread *td = curthread;
475 struct ucred *cred = td->td_ucred;
476 pid_t pid = td->td_proc->p_pid;
477 struct fuse_filehandle *fufh;
478 struct fuse_dispatcher fdi;
479 struct fuse_lk_in *fli;
480 struct fuse_lk_out *flo;
485 int flags = ap->a_flags;
487 dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;
489 if (fuse_isdeadfs(vp)) {
510 if (!(dataflags & FSESS_POSIX_LOCKS))
511 return vop_stdadvlock(ap);
512 /* FUSE doesn't properly support flock until protocol 7.17 */
514 return vop_stdadvlock(ap);
516 vn_lock(vp, LK_SHARED | LK_RETRY);
518 switch (fl->l_whence) {
522 * Caller is responsible for adding any necessary offset
523 * when SEEK_CUR is used.
529 err = fuse_internal_getattr(vp, &vattr, cred, td);
532 size = vattr.va_size;
533 if (size > OFF_MAX ||
534 (fl->l_start > 0 && size > OFF_MAX - fl->l_start)) {
538 start = size + fl->l_start;
545 err = fuse_filehandle_get_anyflags(vp, &fufh, cred, pid);
549 fdisp_init(&fdi, sizeof(*fli));
551 fdisp_make_vp(&fdi, op, vp, td, cred);
553 fli->fh = fufh->fh_id;
554 fli->owner = td->td_proc->p_pid;
555 fli->lk.start = start;
557 fli->lk.end = start + fl->l_len - 1;
559 fli->lk.end = INT64_MAX;
560 fli->lk.type = fl->l_type;
561 fli->lk.pid = td->td_proc->p_pid;
563 err = fdisp_wait_answ(&fdi);
566 if (err == 0 && op == FUSE_GETLK) {
568 fl->l_type = flo->lk.type;
569 fl->l_whence = SEEK_SET;
570 if (flo->lk.type != F_UNLCK) {
571 fl->l_pid = flo->lk.pid;
572 fl->l_start = flo->lk.start;
573 if (flo->lk.end == INT64_MAX)
576 fl->l_len = flo->lk.end - flo->lk.start + 1;
577 fl->l_start = flo->lk.start;
587 fuse_vnop_allocate(struct vop_allocate_args *ap)
589 struct vnode *vp = ap->a_vp;
590 off_t *len = ap->a_len;
591 off_t *offset = ap->a_offset;
592 struct ucred *cred = ap->a_cred;
593 struct fuse_filehandle *fufh;
594 struct mount *mp = vnode_mount(vp);
595 struct fuse_dispatcher fdi;
596 struct fuse_fallocate_in *ffi;
598 pid_t pid = curthread->td_proc->p_pid;
599 struct fuse_vnode_data *fvdat = VTOFUD(vp);
603 if (fuse_isdeadfs(vp))
606 switch (vp->v_type) {
611 if (vfs_isrdonly(mp))
618 if (vfs_isrdonly(mp))
621 if (fsess_not_impl(mp, FUSE_FALLOCATE))
624 io.uio_offset = *offset;
626 err = vn_rlimit_fsize(vp, &io, curthread);
630 err = fuse_filehandle_getrw(vp, FWRITE, &fufh, cred, pid);
634 fuse_vnode_update(vp, FN_MTIMECHANGE | FN_CTIMECHANGE);
636 err = fuse_vnode_size(vp, &filesize, cred, curthread);
639 fuse_inval_buf_range(vp, filesize, *offset, *offset + *len);
641 fdisp_init(&fdi, sizeof(*ffi));
642 fdisp_make_vp(&fdi, FUSE_FALLOCATE, vp, curthread, cred);
644 ffi->fh = fufh->fh_id;
645 ffi->offset = *offset;
648 err = fdisp_wait_answ(&fdi);
651 fsess_set_notimpl(mp, FUSE_FALLOCATE);
653 } else if (err == EOPNOTSUPP) {
655 * The file system server does not support FUSE_FALLOCATE with
656 * the supplied mode for this particular file.
662 fuse_vnode_undirty_cached_timestamps(vp, false);
663 fuse_internal_clear_suid_on_write(vp, cred, curthread);
664 if (*offset > fvdat->cached_attrs.va_size) {
665 fuse_vnode_setsize(vp, *offset, false);
666 getnanouptime(&fvdat->last_local_modify);
677 struct bufobj **a_bop;
683 fuse_vnop_bmap(struct vop_bmap_args *ap)
685 struct vnode *vp = ap->a_vp;
686 struct bufobj **bo = ap->a_bop;
687 struct thread *td = curthread;
689 struct fuse_dispatcher fdi;
690 struct fuse_bmap_in *fbi;
691 struct fuse_bmap_out *fbo;
692 struct fuse_data *data;
693 struct fuse_vnode_data *fvdat = VTOFUD(vp);
696 daddr_t lbn = ap->a_bn;
697 daddr_t *pbn = ap->a_bnp;
698 int *runp = ap->a_runp;
699 int *runb = ap->a_runb;
703 if (fuse_isdeadfs(vp)) {
707 mp = vnode_mount(vp);
708 data = fuse_get_mpdata(mp);
709 biosize = fuse_iosize(vp);
710 maxrun = MIN(vp->v_mount->mnt_iosize_max / biosize - 1,
711 data->max_readahead_blocks);
717 * The FUSE_BMAP operation does not include the runp and runb
718 * variables, so we must guess. Report nonzero contiguous runs so
719 * cluster_read will combine adjacent reads. It's worthwhile to reduce
720 * upcalls even if we don't know the true physical layout of the file.
722 * FUSE file systems may opt out of read clustering in two ways:
723 * * mounting with -onoclusterr
724 * * Setting max_readahead <= maxbcachebuf during FUSE_INIT
727 *runb = MIN(lbn, maxrun);
728 if (runp != NULL && maxrun == 0)
730 else if (runp != NULL) {
732 * If the file's size is cached, use that value to calculate
733 * runp, even if the cache is expired. runp is only advisory,
734 * and the risk of getting it wrong is not worth the cost of
737 if (fvdat->cached_attrs.va_size != VNOVAL)
738 fsize = fvdat->cached_attrs.va_size;
740 error = fuse_vnode_size(vp, &fsize, td->td_ucred, td);
742 *runp = MIN(MAX(0, fsize / (off_t)biosize - lbn - 1),
748 if (fsess_maybe_impl(mp, FUSE_BMAP)) {
749 fdisp_init(&fdi, sizeof(*fbi));
750 fdisp_make_vp(&fdi, FUSE_BMAP, vp, td, td->td_ucred);
753 fbi->blocksize = biosize;
754 error = fdisp_wait_answ(&fdi);
755 if (error == ENOSYS) {
757 fsess_set_notimpl(mp, FUSE_BMAP);
761 if (error == 0 && pbn != NULL)
768 /* If the daemon doesn't support BMAP, make up a sensible default */
770 *pbn = lbn * btodb(biosize);
775 struct vop_close_args {
778 struct ucred *a_cred;
783 fuse_vnop_close(struct vop_close_args *ap)
785 struct vnode *vp = ap->a_vp;
786 struct ucred *cred = ap->a_cred;
787 int fflag = ap->a_fflag;
788 struct thread *td = ap->a_td;
789 pid_t pid = td->td_proc->p_pid;
790 struct fuse_vnode_data *fvdat = VTOFUD(vp);
793 if (fuse_isdeadfs(vp))
797 if (fflag & IO_NDELAY)
800 err = fuse_flush(vp, cred, pid, fflag);
801 if (err == 0 && (fvdat->flag & FN_ATIMECHANGE)) {
805 vap.va_atime = fvdat->cached_attrs.va_atime;
806 err = fuse_internal_setattr(vp, &vap, td, NULL);
808 /* TODO: close the file handle, if we're sure it's no longer used */
809 if ((fvdat->flag & FN_SIZECHANGE) != 0) {
810 fuse_vnode_savesize(vp, cred, td->td_proc->p_pid);
816 struct vop_copy_file_range_args {
817 struct vop_generic_args a_gen;
818 struct vnode *a_invp;
820 struct vnode *a_outvp;
823 unsigned int a_flags;
824 struct ucred *a_incred;
825 struct ucred *a_outcred;
826 struct thread *a_fsizetd;
830 fuse_vnop_copy_file_range(struct vop_copy_file_range_args *ap)
832 struct vnode *invp = ap->a_invp;
833 struct vnode *outvp = ap->a_outvp;
834 struct mount *mp = vnode_mount(invp);
835 struct fuse_vnode_data *outfvdat = VTOFUD(outvp);
836 struct fuse_dispatcher fdi;
837 struct fuse_filehandle *infufh, *outfufh;
838 struct fuse_copy_file_range_in *fcfri;
839 struct ucred *incred = ap->a_incred;
840 struct ucred *outcred = ap->a_outcred;
841 struct fuse_write_out *fwo;
849 if (mp != vnode_mount(outvp))
852 if (incred->cr_uid != outcred->cr_uid)
855 if (incred->cr_groups[0] != outcred->cr_groups[0])
858 if (fsess_not_impl(mp, FUSE_COPY_FILE_RANGE))
861 if (ap->a_fsizetd == NULL)
865 pid = td->td_proc->p_pid;
867 /* Lock both vnodes, avoiding risk of deadlock. */
869 err = vn_lock(outvp, LK_EXCLUSIVE);
873 err = vn_lock(invp, LK_SHARED | LK_NOWAIT);
877 err = vn_lock(invp, LK_SHARED);
885 err = fuse_filehandle_getrw(invp, FREAD, &infufh, incred, pid);
889 err = fuse_filehandle_getrw(outvp, FWRITE, &outfufh, outcred, pid);
893 io.uio_resid = *ap->a_lenp;
895 io.uio_offset = *ap->a_outoffp;
896 err = vn_rlimit_fsizex(outvp, &io, 0, &r, ap->a_fsizetd);
901 err = fuse_vnode_size(outvp, &outfilesize, outcred, curthread);
905 err = fuse_inval_buf_range(outvp, outfilesize, *ap->a_outoffp,
906 *ap->a_outoffp + io.uio_resid);
910 fdisp_init(&fdi, sizeof(*fcfri));
911 fdisp_make_vp(&fdi, FUSE_COPY_FILE_RANGE, invp, td, incred);
913 fcfri->fh_in = infufh->fh_id;
914 fcfri->off_in = *ap->a_inoffp;
915 fcfri->nodeid_out = VTOI(outvp);
916 fcfri->fh_out = outfufh->fh_id;
917 fcfri->off_out = *ap->a_outoffp;
918 fcfri->len = io.uio_resid;
921 err = fdisp_wait_answ(&fdi);
924 *ap->a_lenp = fwo->size;
925 *ap->a_inoffp += fwo->size;
926 *ap->a_outoffp += fwo->size;
927 fuse_internal_clear_suid_on_write(outvp, outcred, td);
928 if (*ap->a_outoffp > outfvdat->cached_attrs.va_size) {
929 fuse_vnode_setsize(outvp, *ap->a_outoffp, false);
930 getnanouptime(&outfvdat->last_local_modify);
932 fuse_vnode_update(invp, FN_ATIMECHANGE);
933 fuse_vnode_update(outvp, FN_MTIMECHANGE | FN_CTIMECHANGE);
943 fsess_set_notimpl(mp, FUSE_COPY_FILE_RANGE);
945 err = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
946 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
947 ap->a_incred, ap->a_outcred, ap->a_fsizetd);
951 * No need to call vn_rlimit_fsizex_res before return, since the uio is
958 fdisp_make_mknod_for_fallback(
959 struct fuse_dispatcher *fdip,
960 struct componentname *cnp,
966 enum fuse_opcode *op)
968 struct fuse_mknod_in *fmni;
970 fdisp_init(fdip, sizeof(*fmni) + cnp->cn_namelen + 1);
972 fdisp_make(fdip, *op, vnode_mount(dvp), parentnid, td, cred);
976 memcpy((char *)fdip->indata + sizeof(*fmni), cnp->cn_nameptr,
978 ((char *)fdip->indata)[sizeof(*fmni) + cnp->cn_namelen] = '\0';
981 struct vnop_create_args {
983 struct vnode **a_vpp;
984 struct componentname *a_cnp;
989 fuse_vnop_create(struct vop_create_args *ap)
991 struct vnode *dvp = ap->a_dvp;
992 struct vnode **vpp = ap->a_vpp;
993 struct componentname *cnp = ap->a_cnp;
994 struct vattr *vap = ap->a_vap;
995 struct thread *td = curthread;
996 struct ucred *cred = cnp->cn_cred;
998 struct fuse_data *data;
999 struct fuse_create_in *fci;
1000 struct fuse_entry_out *feo;
1001 struct fuse_open_out *foo;
1002 struct fuse_dispatcher fdi, fdi2;
1003 struct fuse_dispatcher *fdip = &fdi;
1004 struct fuse_dispatcher *fdip2 = NULL;
1008 struct mount *mp = vnode_mount(dvp);
1009 data = fuse_get_mpdata(mp);
1010 uint64_t parentnid = VTOFUD(dvp)->nid;
1011 mode_t mode = MAKEIMODE(vap->va_type, vap->va_mode);
1012 enum fuse_opcode op;
1015 if (fuse_isdeadfs(dvp))
1018 /* FUSE expects sockets to be created with FUSE_MKNOD */
1019 if (vap->va_type == VSOCK)
1020 return fuse_internal_mknod(dvp, vpp, cnp, vap);
1023 * VOP_CREATE doesn't tell us the open(2) flags, so we guess. Only a
1024 * writable mode makes sense, and we might as well include readability
1029 bzero(&fdi, sizeof(fdi));
1031 if (vap->va_type != VREG)
1034 if (fsess_not_impl(mp, FUSE_CREATE) || vap->va_type == VSOCK) {
1035 /* Fallback to FUSE_MKNOD/FUSE_OPEN */
1036 fdisp_make_mknod_for_fallback(fdip, cnp, dvp, parentnid, td,
1039 /* Use FUSE_CREATE */
1043 fdisp_init(fdip, sizeof(*fci) + cnp->cn_namelen + 1);
1044 fdisp_make(fdip, op, vnode_mount(dvp), parentnid, td, cred);
1047 fci->flags = O_CREAT | flags;
1048 if (fuse_libabi_geq(data, 7, 12)) {
1049 insize = sizeof(*fci);
1050 fci->umask = td->td_proc->p_pd->pd_cmask;
1052 insize = sizeof(struct fuse_open_in);
1055 memcpy((char *)fdip->indata + insize, cnp->cn_nameptr,
1057 ((char *)fdip->indata)[insize + cnp->cn_namelen] = '\0';
1060 err = fdisp_wait_answ(fdip);
1063 if (err == ENOSYS && op == FUSE_CREATE) {
1064 fsess_set_notimpl(mp, FUSE_CREATE);
1065 fdisp_destroy(fdip);
1066 fdisp_make_mknod_for_fallback(fdip, cnp, dvp,
1067 parentnid, td, cred, mode, &op);
1068 err = fdisp_wait_answ(fdip);
1076 if ((err = fuse_internal_checkentry(feo, vap->va_type))) {
1080 if (op == FUSE_CREATE) {
1081 if (fuse_libabi_geq(data, 7, 9))
1082 foo = (struct fuse_open_out*)(feo + 1);
1084 foo = (struct fuse_open_out*)((char*)feo +
1085 FUSE_COMPAT_ENTRY_OUT_SIZE);
1087 /* Issue a separate FUSE_OPEN */
1088 struct fuse_open_in *foi;
1091 fdisp_init(fdip2, sizeof(*foi));
1092 fdisp_make(fdip2, FUSE_OPEN, vnode_mount(dvp), feo->nodeid, td,
1094 foi = fdip2->indata;
1096 err = fdisp_wait_answ(fdip2);
1101 err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, vap->va_type);
1103 struct fuse_release_in *fri;
1104 uint64_t nodeid = feo->nodeid;
1105 uint64_t fh_id = foo->fh;
1107 fdisp_destroy(fdip);
1108 fdisp_init(fdip, sizeof(*fri));
1109 fdisp_make(fdip, FUSE_RELEASE, mp, nodeid, td, cred);
1113 fuse_insert_callback(fdip->tick, fuse_internal_forget_callback);
1114 fuse_insert_message(fdip->tick, false);
1117 ASSERT_VOP_ELOCKED(*vpp, "fuse_vnop_create");
1118 fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid,
1119 feo->attr_valid_nsec, NULL, true);
1121 fuse_filehandle_init(*vpp, FUFH_RDWR, NULL, td, cred, foo);
1122 fuse_vnode_open(*vpp, foo->open_flags, td);
1124 * Purge the parent's attribute cache because the daemon should've
1125 * updated its mtime and ctime
1127 fuse_vnode_clear_attr_cache(dvp);
1128 cache_purge_negative(dvp);
1132 fdisp_destroy(fdip2);
1133 fdisp_destroy(fdip);
1138 struct vnop_fdatasync_args {
1139 struct vop_generic_args a_gen;
1140 struct vnode * a_vp;
1141 struct thread * a_td;
1145 fuse_vnop_fdatasync(struct vop_fdatasync_args *ap)
1147 struct vnode *vp = ap->a_vp;
1148 struct thread *td = ap->a_td;
1149 int waitfor = MNT_WAIT;
1153 if (fuse_isdeadfs(vp)) {
1156 if ((err = vop_stdfdatasync_buf(ap)))
1159 return fuse_internal_fsync(vp, td, waitfor, true);
1163 struct vnop_fsync_args {
1164 struct vop_generic_args a_gen;
1165 struct vnode * a_vp;
1167 struct thread * a_td;
1171 fuse_vnop_fsync(struct vop_fsync_args *ap)
1173 struct vnode *vp = ap->a_vp;
1174 struct thread *td = ap->a_td;
1175 int waitfor = ap->a_waitfor;
1178 if (fuse_isdeadfs(vp)) {
1181 if ((err = vop_stdfsync(ap)))
1184 return fuse_internal_fsync(vp, td, waitfor, false);
1188 struct vnop_getattr_args {
1190 struct vattr *a_vap;
1191 struct ucred *a_cred;
1192 struct thread *a_td;
1196 fuse_vnop_getattr(struct vop_getattr_args *ap)
1198 struct vnode *vp = ap->a_vp;
1199 struct vattr *vap = ap->a_vap;
1200 struct ucred *cred = ap->a_cred;
1201 struct thread *td = curthread;
1206 dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;
1208 /* Note that we are not bailing out on a dead file system just yet. */
1210 if (!(dataflags & FSESS_INITED)) {
1211 if (!vnode_isvroot(vp)) {
1212 fdata_set_dead(fuse_get_mpdata(vnode_mount(vp)));
1219 err = fuse_internal_getattr(vp, vap, cred, td);
1220 if (err == ENOTCONN && vnode_isvroot(vp)) {
1221 /* see comment in fuse_vfsop_statfs() */
1228 bzero(vap, sizeof(*vap));
1229 vap->va_type = vnode_vtype(vp);
1235 struct vnop_inactive_args {
1240 fuse_vnop_inactive(struct vop_inactive_args *ap)
1242 struct vnode *vp = ap->a_vp;
1243 struct thread *td = curthread;
1245 struct fuse_vnode_data *fvdat = VTOFUD(vp);
1246 struct fuse_filehandle *fufh, *fufh_tmp;
1250 LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) {
1251 if (need_flush && vp->v_type == VREG) {
1252 if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {
1253 fuse_vnode_savesize(vp, NULL, 0);
1255 if ((fvdat->flag & FN_REVOKED) != 0)
1256 fuse_io_invalbuf(vp, td);
1258 fuse_io_flushbuf(vp, MNT_WAIT, td);
1261 fuse_filehandle_close(vp, fufh, td, NULL);
1264 if ((fvdat->flag & FN_REVOKED) != 0)
1271 struct vnop_ioctl_args {
1276 struct ucred *a_cred;
1277 struct thread *a_td;
1281 fuse_vnop_ioctl(struct vop_ioctl_args *ap)
1283 struct vnode *vp = ap->a_vp;
1284 struct mount *mp = vnode_mount(vp);
1285 struct ucred *cred = ap->a_cred;
1287 pid_t pid = ap->a_td->td_proc->p_pid;
1290 switch (ap->a_command) {
1293 /* Call FUSE_LSEEK, if we can, or fall back to vop_stdioctl */
1294 if (fsess_maybe_impl(mp, FUSE_LSEEK)) {
1298 if (ap->a_command == FIOSEEKDATA)
1303 vn_lock(vp, LK_SHARED | LK_RETRY);
1304 err = fuse_vnop_do_lseek(vp, ap->a_td, cred, pid, offp,
1308 if (fsess_not_impl(mp, FUSE_LSEEK))
1309 err = vop_stdioctl(ap);
1312 /* TODO: implement FUSE_IOCTL */
1321 struct vnop_link_args {
1322 struct vnode *a_tdvp;
1324 struct componentname *a_cnp;
1328 fuse_vnop_link(struct vop_link_args *ap)
1330 struct vnode *vp = ap->a_vp;
1331 struct vnode *tdvp = ap->a_tdvp;
1332 struct componentname *cnp = ap->a_cnp;
1334 struct vattr *vap = VTOVA(vp);
1336 struct fuse_dispatcher fdi;
1337 struct fuse_entry_out *feo;
1338 struct fuse_link_in fli;
1342 if (fuse_isdeadfs(vp)) {
1345 if (vnode_mount(tdvp) != vnode_mount(vp)) {
1350 * This is a seatbelt check to protect naive userspace filesystems from
1351 * themselves and the limitations of the FUSE IPC protocol. If a
1352 * filesystem does not allow attribute caching, assume it is capable of
1353 * validating that nlink does not overflow.
1355 if (vap != NULL && vap->va_nlink >= FUSE_LINK_MAX)
1357 fli.oldnodeid = VTOI(vp);
1359 fdisp_init(&fdi, 0);
1360 fuse_internal_newentry_makerequest(vnode_mount(tdvp), VTOI(tdvp), cnp,
1361 FUSE_LINK, &fli, sizeof(fli), &fdi);
1362 if ((err = fdisp_wait_answ(&fdi))) {
1367 if (fli.oldnodeid != feo->nodeid) {
1368 struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
1369 fuse_warn(data, FSESS_WARN_ILLEGAL_INODE,
1370 "Assigned wrong inode for a hard link.");
1371 fuse_vnode_clear_attr_cache(vp);
1372 fuse_vnode_clear_attr_cache(tdvp);
1377 err = fuse_internal_checkentry(feo, vnode_vtype(vp));
1380 * Purge the parent's attribute cache because the daemon
1381 * should've updated its mtime and ctime
1383 fuse_vnode_clear_attr_cache(tdvp);
1384 fuse_internal_cache_attrs(vp, &feo->attr, feo->attr_valid,
1385 feo->attr_valid_nsec, NULL, true);
1388 fdisp_destroy(&fdi);
1392 struct fuse_lookup_alloc_arg {
1393 struct fuse_entry_out *feo;
1394 struct componentname *cnp;
1399 /* Callback for vn_get_ino */
1401 fuse_lookup_alloc(struct mount *mp, void *arg, int lkflags, struct vnode **vpp)
1403 struct fuse_lookup_alloc_arg *flaa = arg;
1405 return fuse_vnode_get(mp, flaa->feo, flaa->nid, NULL, vpp, flaa->cnp,
1409 SDT_PROBE_DEFINE3(fusefs, , vnops, cache_lookup,
1410 "int", "struct timespec*", "struct timespec*");
1412 struct vnop_lookup_args {
1413 struct vnodeop_desc *a_desc;
1414 struct vnode *a_dvp;
1415 struct vnode **a_vpp;
1416 struct componentname *a_cnp;
1420 fuse_vnop_lookup(struct vop_lookup_args *ap)
1422 struct vnode *dvp = ap->a_dvp;
1423 struct vnode **vpp = ap->a_vpp;
1424 struct componentname *cnp = ap->a_cnp;
1425 struct thread *td = curthread;
1426 struct ucred *cred = cnp->cn_cred;
1427 struct timespec now;
1429 int nameiop = cnp->cn_nameiop;
1430 int flags = cnp->cn_flags;
1431 int islastcn = flags & ISLASTCN;
1432 struct mount *mp = vnode_mount(dvp);
1433 struct fuse_data *data = fuse_get_mpdata(mp);
1434 int default_permissions = data->dataflags & FSESS_DEFAULT_PERMISSIONS;
1439 struct vnode *vp = NULL;
1441 struct fuse_dispatcher fdi;
1442 bool did_lookup = false;
1443 struct fuse_entry_out *feo = NULL;
1444 enum vtype vtyp; /* vnode type of target */
1448 if (fuse_isdeadfs(dvp)) {
1452 if (!vnode_isdir(dvp))
1455 if (islastcn && vfs_isrdonly(mp) && (nameiop != LOOKUP))
1458 if ((cnp->cn_flags & NOEXECCHECK) != 0)
1459 cnp->cn_flags &= ~NOEXECCHECK;
1460 else if ((err = fuse_internal_access(dvp, VEXEC, td, cred)))
1463 is_dot = cnp->cn_namelen == 1 && *(cnp->cn_nameptr) == '.';
1464 if ((flags & ISDOTDOT) && !(data->dataflags & FSESS_EXPORT_SUPPORT))
1466 if (!(VTOFUD(dvp)->flag & FN_PARENT_NID)) {
1468 * Since the file system doesn't support ".." lookups,
1469 * we have no way to find this entry.
1473 nid = VTOFUD(dvp)->parent_nid;
1476 /* .. is obviously a directory */
1478 } else if (is_dot) {
1480 /* . is obviously a directory */
1483 struct timespec timeout;
1484 int ncpticks; /* here to accommodate for API contract */
1486 err = cache_lookup(dvp, vpp, cnp, &timeout, &ncpticks);
1487 getnanouptime(&now);
1488 SDT_PROBE3(fusefs, , vnops, cache_lookup, err, &timeout, &now);
1490 case -1: /* positive match */
1491 if (timespeccmp(&timeout, &now, >)) {
1492 counter_u64_add(fuse_lookup_cache_hits, 1);
1495 counter_u64_add(fuse_lookup_cache_misses, 1);
1497 &VTOFUD(*vpp)->entry_cache_timeout);
1508 case 0: /* no match in cache */
1509 counter_u64_add(fuse_lookup_cache_misses, 1);
1512 case ENOENT: /* negative match */
1513 if (timespeccmp(&timeout, &now, <=)) {
1515 cache_purge_negative(dvp);
1523 fdisp_init(&fdi, cnp->cn_namelen + 1);
1524 fdisp_make(&fdi, FUSE_LOOKUP, mp, VTOI(dvp), td, cred);
1526 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
1527 ((char *)fdi.indata)[cnp->cn_namelen] = '\0';
1528 lookup_err = fdisp_wait_answ(&fdi);
1532 /* lookup call succeeded */
1533 feo = (struct fuse_entry_out *)fdi.answ;
1536 /* zero nodeid means ENOENT and cache it */
1537 struct timespec timeout;
1539 fdi.answ_stat = ENOENT;
1540 lookup_err = ENOENT;
1541 if (cnp->cn_flags & MAKEENTRY) {
1542 fuse_validity_2_timespec(feo, &timeout);
1543 /* Use the same entry_time for .. as for
1544 * the file itself. That doesn't honor
1545 * exactly what the fuse server tells
1546 * us, but to do otherwise would require
1547 * another cache lookup at this point.
1549 struct timespec *dtsp = NULL;
1550 cache_enter_time(dvp, *vpp, cnp,
1554 vtyp = IFTOVT(feo->attr.mode);
1556 if (lookup_err && (!fdi.answ_stat || lookup_err != ENOENT)) {
1557 fdisp_destroy(&fdi);
1561 /* lookup_err, if non-zero, must be ENOENT at this point */
1564 /* Entry not found */
1565 if ((nameiop == CREATE || nameiop == RENAME) && islastcn) {
1566 if (default_permissions)
1567 err = fuse_internal_access(dvp, VWRITE, td,
1578 /* Entry was found */
1579 if (flags & ISDOTDOT) {
1580 struct fuse_lookup_alloc_arg flaa;
1586 err = vn_vget_ino_gen(dvp, fuse_lookup_alloc, &flaa, 0,
1589 } else if (nid == VTOI(dvp)) {
1594 fuse_warn(fuse_get_mpdata(mp),
1595 FSESS_WARN_ILLEGAL_INODE,
1596 "Assigned same inode to both parent and "
1602 struct fuse_vnode_data *fvdat;
1604 err = fuse_vnode_get(vnode_mount(dvp), feo, nid, dvp,
1612 if (timespeccmp(&now, &fvdat->last_local_modify, >)) {
1614 * Attributes from the server are definitely
1615 * newer than the last attributes we sent to
1616 * the server, so cache them.
1618 fuse_internal_cache_attrs(*vpp, &feo->attr,
1619 feo->attr_valid, feo->attr_valid_nsec,
1622 fuse_validity_2_bintime(feo->entry_valid,
1623 feo->entry_valid_nsec,
1624 &fvdat->entry_cache_timeout);
1626 if ((nameiop == DELETE || nameiop == RENAME) &&
1627 islastcn && default_permissions)
1629 struct vattr dvattr;
1631 err = fuse_internal_access(dvp, VWRITE, td,
1636 * if the parent's sticky bit is set, check
1637 * whether we're allowed to remove the file.
1638 * Need to figure out the vnode locking to make
1641 fuse_internal_getattr(dvp, &dvattr, cred, td);
1642 if ((dvattr.va_mode & S_ISTXT) &&
1643 fuse_internal_access(dvp, VADMIN, td,
1645 fuse_internal_access(*vpp, VADMIN, td,
1655 if (vp != NULL && dvp != vp)
1657 else if (vp != NULL)
1662 fdisp_destroy(&fdi);
1668 struct vnop_mkdir_args {
1669 struct vnode *a_dvp;
1670 struct vnode **a_vpp;
1671 struct componentname *a_cnp;
1672 struct vattr *a_vap;
1676 fuse_vnop_mkdir(struct vop_mkdir_args *ap)
1678 struct vnode *dvp = ap->a_dvp;
1679 struct vnode **vpp = ap->a_vpp;
1680 struct componentname *cnp = ap->a_cnp;
1681 struct vattr *vap = ap->a_vap;
1683 struct fuse_mkdir_in fmdi;
1685 if (fuse_isdeadfs(dvp)) {
1688 fmdi.mode = MAKEIMODE(vap->va_type, vap->va_mode);
1689 fmdi.umask = curthread->td_proc->p_pd->pd_cmask;
1691 return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKDIR, &fmdi,
1692 sizeof(fmdi), VDIR));
1696 struct vnop_mknod_args {
1697 struct vnode *a_dvp;
1698 struct vnode **a_vpp;
1699 struct componentname *a_cnp;
1700 struct vattr *a_vap;
1704 fuse_vnop_mknod(struct vop_mknod_args *ap)
1707 struct vnode *dvp = ap->a_dvp;
1708 struct vnode **vpp = ap->a_vpp;
1709 struct componentname *cnp = ap->a_cnp;
1710 struct vattr *vap = ap->a_vap;
1712 if (fuse_isdeadfs(dvp))
1715 return fuse_internal_mknod(dvp, vpp, cnp, vap);
1719 struct vop_open_args {
1722 struct ucred *a_cred;
1723 struct thread *a_td;
1724 int a_fdidx; / struct file *a_fp;
1728 fuse_vnop_open(struct vop_open_args *ap)
1730 struct vnode *vp = ap->a_vp;
1731 int a_mode = ap->a_mode;
1732 struct thread *td = ap->a_td;
1733 struct ucred *cred = ap->a_cred;
1734 pid_t pid = td->td_proc->p_pid;
1736 if (fuse_isdeadfs(vp))
1738 if (vp->v_type == VCHR || vp->v_type == VBLK || vp->v_type == VFIFO)
1739 return (EOPNOTSUPP);
1740 if ((a_mode & (FREAD | FWRITE | FEXEC)) == 0)
1743 if (fuse_filehandle_validrw(vp, a_mode, cred, pid)) {
1744 fuse_vnode_open(vp, 0, td);
1748 return fuse_filehandle_open(vp, a_mode, NULL, td, cred);
1752 fuse_vnop_pathconf(struct vop_pathconf_args *ap)
1754 struct vnode *vp = ap->a_vp;
1757 switch (ap->a_name) {
1758 case _PC_FILESIZEBITS:
1762 *ap->a_retval = NAME_MAX;
1765 *ap->a_retval = MIN(LONG_MAX, FUSE_LINK_MAX);
1767 case _PC_SYMLINK_MAX:
1768 *ap->a_retval = MAXPATHLEN;
1773 case _PC_MIN_HOLE_SIZE:
1775 * The FUSE protocol provides no mechanism for a server to
1776 * report _PC_MIN_HOLE_SIZE. It's a protocol bug. Instead,
1777 * return EINVAL if the server does not support FUSE_LSEEK, or
1780 mp = vnode_mount(vp);
1781 if (!fsess_is_impl(mp, FUSE_LSEEK) &&
1782 !fsess_not_impl(mp, FUSE_LSEEK)) {
1785 /* Issue a FUSE_LSEEK to find out if it's implemented */
1786 fuse_vnop_do_lseek(vp, curthread, curthread->td_ucred,
1787 curthread->td_proc->p_pid, &offset, SEEK_DATA);
1790 if (fsess_is_impl(mp, FUSE_LSEEK)) {
1795 * Probably FUSE_LSEEK is not implemented. It might
1796 * be, if the FUSE_LSEEK above returned an error like
1797 * EACCES, but in that case we can't tell, so it's
1798 * safest to report EINVAL anyway.
1803 return (vop_stdpathconf(ap));
1807 SDT_PROBE_DEFINE3(fusefs, , vnops, filehandles_closed, "struct vnode*",
1808 "struct uio*", "struct ucred*");
1810 struct vnop_read_args {
1814 struct ucred *a_cred;
1818 fuse_vnop_read(struct vop_read_args *ap)
1820 struct vnode *vp = ap->a_vp;
1821 struct uio *uio = ap->a_uio;
1822 int ioflag = ap->a_ioflag;
1823 struct ucred *cred = ap->a_cred;
1824 pid_t pid = curthread->td_proc->p_pid;
1825 struct fuse_filehandle *fufh;
1827 bool closefufh = false, directio;
1829 MPASS(vp->v_type == VREG || vp->v_type == VDIR);
1831 if (fuse_isdeadfs(vp)) {
1835 if (VTOFUD(vp)->flag & FN_DIRECTIO) {
1836 ioflag |= IO_DIRECT;
1839 err = fuse_filehandle_getrw(vp, FREAD, &fufh, cred, pid);
1840 if (err == EBADF && vnode_mount(vp)->mnt_flag & MNT_EXPORTED) {
1842 * nfsd will do I/O without first doing VOP_OPEN. We
1843 * must implicitly open the file here
1845 err = fuse_filehandle_open(vp, FREAD, &fufh, curthread, cred);
1849 SDT_PROBE3(fusefs, , vnops, filehandles_closed, vp, uio, cred);
1854 * Ideally, when the daemon asks for direct io at open time, the
1855 * standard file flag should be set according to this, so that would
1856 * just change the default mode, which later on could be changed via
1858 * But this doesn't work, the O_DIRECT flag gets cleared at some point
1859 * (don't know where). So to make any use of the Fuse direct_io option,
1860 * we hardwire it into the file's private data (similarly to Linux,
1863 directio = (ioflag & IO_DIRECT) || !fsess_opt_datacache(vnode_mount(vp));
1865 fuse_vnode_update(vp, FN_ATIMECHANGE);
1867 SDT_PROBE2(fusefs, , vnops, trace, 1, "direct read of vnode");
1868 err = fuse_read_directbackend(vp, uio, cred, fufh);
1870 SDT_PROBE2(fusefs, , vnops, trace, 1, "buffered read of vnode");
1871 err = fuse_read_biobackend(vp, uio, ioflag, cred, fufh, pid);
1875 fuse_filehandle_close(vp, fufh, curthread, cred);
1881 struct vnop_readdir_args {
1884 struct ucred *a_cred;
1887 uint64_t **a_cookies;
1891 fuse_vnop_readdir(struct vop_readdir_args *ap)
1893 struct vnode *vp = ap->a_vp;
1894 struct uio *uio = ap->a_uio;
1895 struct ucred *cred = ap->a_cred;
1896 struct fuse_filehandle *fufh = NULL;
1897 struct mount *mp = vnode_mount(vp);
1898 struct fuse_iov cookediov;
1903 bool closefufh = false;
1904 pid_t pid = curthread->td_proc->p_pid;
1908 if (fuse_isdeadfs(vp)) {
1911 if ( /* XXXIP ((uio_iovcnt(uio) > 1)) || */
1912 (uio_resid(uio) < sizeof(struct dirent))) {
1916 tresid = uio->uio_resid;
1917 err = fuse_filehandle_get_dir(vp, &fufh, cred, pid);
1918 if (err == EBADF && mp->mnt_flag & MNT_EXPORTED) {
1919 KASSERT(fuse_get_mpdata(mp)->dataflags
1920 & FSESS_NO_OPENDIR_SUPPORT,
1921 ("FUSE file systems that don't set "
1922 "FUSE_NO_OPENDIR_SUPPORT should not be exported"));
1924 * nfsd will do VOP_READDIR without first doing VOP_OPEN. We
1925 * must implicitly open the directory here.
1927 err = fuse_filehandle_open(vp, FREAD, &fufh, curthread, cred);
1932 if (ap->a_ncookies != NULL) {
1933 ncookies = uio->uio_resid /
1934 (offsetof(struct dirent, d_name) + 4) + 1;
1935 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK);
1936 *ap->a_ncookies = ncookies;
1937 *ap->a_cookies = cookies;
1942 #define DIRCOOKEDSIZE FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + MAXNAMLEN + 1)
1943 fiov_init(&cookediov, DIRCOOKEDSIZE);
1945 err = fuse_internal_readdir(vp, uio, fufh, &cookediov,
1946 &ncookies, cookies);
1948 fiov_teardown(&cookediov);
1950 fuse_filehandle_close(vp, fufh, curthread, cred);
1952 if (ap->a_ncookies != NULL) {
1954 *ap->a_ncookies -= ncookies;
1956 free(*ap->a_cookies, M_TEMP);
1957 *ap->a_ncookies = 0;
1958 *ap->a_cookies = NULL;
1961 if (err == 0 && tresid == uio->uio_resid)
1968 struct vnop_readlink_args {
1971 struct ucred *a_cred;
1975 fuse_vnop_readlink(struct vop_readlink_args *ap)
1977 struct vnode *vp = ap->a_vp;
1978 struct uio *uio = ap->a_uio;
1979 struct ucred *cred = ap->a_cred;
1981 struct fuse_dispatcher fdi;
1984 if (fuse_isdeadfs(vp)) {
1987 if (!vnode_islnk(vp)) {
1990 fdisp_init(&fdi, 0);
1991 err = fdisp_simple_putget_vp(&fdi, FUSE_READLINK, vp, curthread, cred);
1995 if (((char *)fdi.answ)[0] == '/' &&
1996 fuse_get_mpdata(vnode_mount(vp))->dataflags & FSESS_PUSH_SYMLINKS_IN) {
1997 char *mpth = vnode_mount(vp)->mnt_stat.f_mntonname;
1999 err = uiomove(mpth, strlen(mpth), uio);
2002 err = uiomove(fdi.answ, fdi.iosize, uio);
2005 fdisp_destroy(&fdi);
2010 struct vnop_reclaim_args {
2015 fuse_vnop_reclaim(struct vop_reclaim_args *ap)
2017 struct vnode *vp = ap->a_vp;
2018 struct thread *td = curthread;
2019 struct fuse_vnode_data *fvdat = VTOFUD(vp);
2020 struct fuse_filehandle *fufh, *fufh_tmp;
2023 panic("FUSE: no vnode data during recycling");
2025 LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) {
2026 printf("FUSE: vnode being reclaimed with open fufh "
2027 "(type=%#x)", fufh->fufh_type);
2028 fuse_filehandle_close(vp, fufh, td, NULL);
2031 if (VTOI(vp) == 1) {
2033 * Don't send FUSE_FORGET for the root inode, because
2034 * we never send FUSE_LOOKUP for it (see
2035 * fuse_vfsop_root) and we don't want the server to see
2036 * mismatched lookup counts.
2038 struct fuse_data *data;
2039 struct vnode *vroot;
2041 data = fuse_get_mpdata(vnode_mount(vp));
2043 vroot = data->vroot;
2048 } else if (!fuse_isdeadfs(vp) && fvdat->nlookup > 0) {
2049 fuse_internal_forget_send(vnode_mount(vp), td, NULL, VTOI(vp),
2053 vfs_hash_remove(vp);
2054 fuse_vnode_destroy(vp);
2060 struct vnop_remove_args {
2061 struct vnode *a_dvp;
2063 struct componentname *a_cnp;
2067 fuse_vnop_remove(struct vop_remove_args *ap)
2069 struct vnode *dvp = ap->a_dvp;
2070 struct vnode *vp = ap->a_vp;
2071 struct componentname *cnp = ap->a_cnp;
2075 if (fuse_isdeadfs(vp)) {
2078 if (vnode_isdir(vp)) {
2082 err = fuse_internal_remove(dvp, vp, cnp, FUSE_UNLINK);
2088 struct vnop_rename_args {
2089 struct vnode *a_fdvp;
2090 struct vnode *a_fvp;
2091 struct componentname *a_fcnp;
2092 struct vnode *a_tdvp;
2093 struct vnode *a_tvp;
2094 struct componentname *a_tcnp;
2098 fuse_vnop_rename(struct vop_rename_args *ap)
2100 struct vnode *fdvp = ap->a_fdvp;
2101 struct vnode *fvp = ap->a_fvp;
2102 struct componentname *fcnp = ap->a_fcnp;
2103 struct vnode *tdvp = ap->a_tdvp;
2104 struct vnode *tvp = ap->a_tvp;
2105 struct componentname *tcnp = ap->a_tcnp;
2106 struct fuse_data *data;
2107 bool newparent = fdvp != tdvp;
2108 bool isdir = fvp->v_type == VDIR;
2111 if (fuse_isdeadfs(fdvp)) {
2114 if (fvp->v_mount != tdvp->v_mount ||
2115 (tvp && fvp->v_mount != tvp->v_mount)) {
2116 SDT_PROBE2(fusefs, , vnops, trace, 1, "cross-device rename");
2123 * FUSE library is expected to check if target directory is not
2124 * under the source directory in the file system tree.
2125 * Linux performs this check at VFS level.
2128 * If source is a directory, and it will get a new parent, user must
2129 * have write permission to it, so ".." can be modified.
2131 data = fuse_get_mpdata(vnode_mount(tdvp));
2132 if (data->dataflags & FSESS_DEFAULT_PERMISSIONS && isdir && newparent) {
2133 err = fuse_internal_access(fvp, VWRITE,
2134 curthread, tcnp->cn_cred);
2138 sx_xlock(&data->rename_lock);
2139 err = fuse_internal_rename(fdvp, fcnp, tdvp, tcnp);
2142 fuse_vnode_setparent(fvp, tdvp);
2144 fuse_vnode_setparent(tvp, NULL);
2146 sx_unlock(&data->rename_lock);
2148 if (tvp != NULL && tvp != fvp) {
2151 if (vnode_isdir(fvp)) {
2152 if (((tvp != NULL) && vnode_isdir(tvp)) || vnode_isdir(fvp)) {
2173 struct vnop_rmdir_args {
2174 struct vnode *a_dvp;
2176 struct componentname *a_cnp;
2180 fuse_vnop_rmdir(struct vop_rmdir_args *ap)
2182 struct vnode *dvp = ap->a_dvp;
2183 struct vnode *vp = ap->a_vp;
2187 if (fuse_isdeadfs(vp)) {
2190 if (VTOFUD(vp) == VTOFUD(dvp)) {
2193 err = fuse_internal_remove(dvp, vp, ap->a_cnp, FUSE_RMDIR);
2199 struct vnop_setattr_args {
2201 struct vattr *a_vap;
2202 struct ucred *a_cred;
2203 struct thread *a_td;
2207 fuse_vnop_setattr(struct vop_setattr_args *ap)
2209 struct vnode *vp = ap->a_vp;
2210 struct vattr *vap = ap->a_vap;
2211 struct ucred *cred = ap->a_cred;
2212 struct thread *td = curthread;
2214 struct fuse_data *data;
2215 struct vattr old_va;
2218 accmode_t accmode = 0;
2220 bool drop_suid = false;
2223 mp = vnode_mount(vp);
2224 data = fuse_get_mpdata(mp);
2225 dataflags = data->dataflags;
2226 checkperm = dataflags & FSESS_DEFAULT_PERMISSIONS;
2227 if (cred->cr_ngroups > 0)
2228 cr_gid = cred->cr_groups[0];
2232 if (fuse_isdeadfs(vp)) {
2236 if (vap->va_uid != (uid_t)VNOVAL) {
2238 /* Only root may change a file's owner */
2239 err = priv_check_cred(cred, PRIV_VFS_CHOWN);
2241 /* As a special case, allow the null chown */
2242 err2 = fuse_internal_getattr(vp, &old_va, cred,
2246 if (vap->va_uid != old_va.va_uid)
2256 if (vap->va_gid != (gid_t)VNOVAL) {
2257 if (checkperm && priv_check_cred(cred, PRIV_VFS_CHOWN))
2259 if (checkperm && !groupmember(vap->va_gid, cred))
2262 * Non-root users may only chgrp to one of their own
2265 err = priv_check_cred(cred, PRIV_VFS_CHOWN);
2267 /* As a special case, allow the null chgrp */
2268 err2 = fuse_internal_getattr(vp, &old_va, cred,
2272 if (vap->va_gid != old_va.va_gid)
2280 if (vap->va_size != VNOVAL) {
2281 switch (vp->v_type) {
2286 if (vfs_isrdonly(mp))
2288 err = vn_rlimit_trunc(vap->va_size, td);
2294 * According to POSIX, the result is unspecified
2295 * for file types other than regular files,
2296 * directories and shared memory objects. We
2297 * don't support shared memory objects in the file
2298 * system, and have dubious support for truncating
2299 * symlinks. Just ignore the request in other cases.
2303 /* Don't set accmode. Permission to trunc is checked upstack */
2305 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
2306 if (vap->va_vaflags & VA_UTIMES_NULL)
2312 if (vap->va_mode != (mode_t)VNOVAL)
2313 vap->va_mode &= ~(S_ISUID | S_ISGID);
2315 err = fuse_internal_getattr(vp, &old_va, cred, td);
2318 vap->va_mode = old_va.va_mode & ~(S_ISUID | S_ISGID);
2321 if (vap->va_mode != (mode_t)VNOVAL) {
2322 /* Only root may set the sticky bit on non-directories */
2323 if (checkperm && vp->v_type != VDIR && (vap->va_mode & S_ISTXT)
2324 && priv_check_cred(cred, PRIV_VFS_STICKYFILE))
2326 if (checkperm && (vap->va_mode & S_ISGID)) {
2327 err = fuse_internal_getattr(vp, &old_va, cred, td);
2330 if (!groupmember(old_va.va_gid, cred)) {
2331 err = priv_check_cred(cred, PRIV_VFS_SETGID);
2339 if (vfs_isrdonly(mp))
2343 err = fuse_internal_access(vp, accmode, td, cred);
2350 return fuse_internal_setattr(vp, vap, td, cred);
2354 struct vnop_strategy_args {
2360 fuse_vnop_strategy(struct vop_strategy_args *ap)
2362 struct vnode *vp = ap->a_vp;
2363 struct buf *bp = ap->a_bp;
2365 if (!vp || fuse_isdeadfs(vp)) {
2366 bp->b_ioflags |= BIO_ERROR;
2367 bp->b_error = ENXIO;
2373 * VOP_STRATEGY always returns zero and signals error via bp->b_ioflags.
2374 * fuse_io_strategy sets bp's error fields
2376 (void)fuse_io_strategy(vp, bp);
2382 struct vnop_symlink_args {
2383 struct vnode *a_dvp;
2384 struct vnode **a_vpp;
2385 struct componentname *a_cnp;
2386 struct vattr *a_vap;
2391 fuse_vnop_symlink(struct vop_symlink_args *ap)
2393 struct vnode *dvp = ap->a_dvp;
2394 struct vnode **vpp = ap->a_vpp;
2395 struct componentname *cnp = ap->a_cnp;
2396 const char *target = ap->a_target;
2398 struct fuse_dispatcher fdi;
2403 if (fuse_isdeadfs(dvp)) {
2407 * Unlike the other creator type calls, here we have to create a message
2408 * where the name of the new entry comes first, and the data describing
2409 * the entry comes second.
2410 * Hence we can't rely on our handy fuse_internal_newentry() routine,
2411 * but put together the message manually and just call the core part.
2414 len = strlen(target) + 1;
2415 fdisp_init(&fdi, len + cnp->cn_namelen + 1);
2416 fdisp_make_vp(&fdi, FUSE_SYMLINK, dvp, curthread, NULL);
2418 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
2419 ((char *)fdi.indata)[cnp->cn_namelen] = '\0';
2420 memcpy((char *)fdi.indata + cnp->cn_namelen + 1, target, len);
2422 err = fuse_internal_newentry_core(dvp, vpp, cnp, VLNK, &fdi);
2423 fdisp_destroy(&fdi);
2428 struct vnop_write_args {
2432 struct ucred *a_cred;
2436 fuse_vnop_write(struct vop_write_args *ap)
2438 struct vnode *vp = ap->a_vp;
2439 struct uio *uio = ap->a_uio;
2440 int ioflag = ap->a_ioflag;
2441 struct ucred *cred = ap->a_cred;
2442 pid_t pid = curthread->td_proc->p_pid;
2443 struct fuse_filehandle *fufh;
2445 bool closefufh = false, directio;
2447 MPASS(vp->v_type == VREG || vp->v_type == VDIR);
2449 if (fuse_isdeadfs(vp)) {
2453 if (VTOFUD(vp)->flag & FN_DIRECTIO) {
2454 ioflag |= IO_DIRECT;
2457 err = fuse_filehandle_getrw(vp, FWRITE, &fufh, cred, pid);
2458 if (err == EBADF && vnode_mount(vp)->mnt_flag & MNT_EXPORTED) {
2460 * nfsd will do I/O without first doing VOP_OPEN. We
2461 * must implicitly open the file here
2463 err = fuse_filehandle_open(vp, FWRITE, &fufh, curthread, cred);
2467 SDT_PROBE3(fusefs, , vnops, filehandles_closed, vp, uio, cred);
2472 * Ideally, when the daemon asks for direct io at open time, the
2473 * standard file flag should be set according to this, so that would
2474 * just change the default mode, which later on could be changed via
2476 * But this doesn't work, the O_DIRECT flag gets cleared at some point
2477 * (don't know where). So to make any use of the Fuse direct_io option,
2478 * we hardwire it into the file's private data (similarly to Linux,
2481 directio = (ioflag & IO_DIRECT) || !fsess_opt_datacache(vnode_mount(vp));
2483 fuse_vnode_update(vp, FN_MTIMECHANGE | FN_CTIMECHANGE);
2485 off_t start, end, filesize;
2486 bool pages = (ioflag & IO_VMIO) != 0;
2488 SDT_PROBE2(fusefs, , vnops, trace, 1, "direct write of vnode");
2490 err = fuse_vnode_size(vp, &filesize, cred, curthread);
2494 start = uio->uio_offset;
2495 end = start + uio->uio_resid;
2497 err = fuse_inval_buf_range(vp, filesize, start,
2502 err = fuse_write_directbackend(vp, uio, cred, fufh,
2503 filesize, ioflag, pages);
2505 SDT_PROBE2(fusefs, , vnops, trace, 1,
2506 "buffered write of vnode");
2507 if (!fsess_opt_writeback(vnode_mount(vp)))
2509 err = fuse_write_biobackend(vp, uio, cred, fufh, ioflag, pid);
2511 fuse_internal_clear_suid_on_write(vp, cred, uio->uio_td);
2515 fuse_filehandle_close(vp, fufh, curthread, cred);
2521 fuse_gbp_getblkno(struct vnode *vp, vm_ooffset_t off)
2523 const int biosize = fuse_iosize(vp);
2525 return (off / biosize);
2529 fuse_gbp_getblksz(struct vnode *vp, daddr_t lbn, long *blksz)
2533 const int biosize = fuse_iosize(vp);
2535 err = fuse_vnode_size(vp, &filesize, NULL, NULL);
2537 /* This will turn into a SIGBUS */
2539 } else if ((off_t)lbn * biosize >= filesize) {
2541 } else if ((off_t)(lbn + 1) * biosize > filesize) {
2542 *blksz = filesize - (off_t)lbn *biosize;
2550 struct vnop_getpages_args {
2558 fuse_vnop_getpages(struct vop_getpages_args *ap)
2560 struct vnode *vp = ap->a_vp;
2562 if (!fsess_opt_mmap(vnode_mount(vp))) {
2563 SDT_PROBE2(fusefs, , vnops, trace, 1,
2564 "called on non-cacheable vnode??\n");
2565 return (VM_PAGER_ERROR);
2568 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, ap->a_rbehind,
2569 ap->a_rahead, fuse_gbp_getblkno, fuse_gbp_getblksz));
2572 static const char extattr_namespace_separator = '.';
2575 struct vop_getextattr_args {
2576 struct vop_generic_args a_gen;
2578 int a_attrnamespace;
2582 struct ucred *a_cred;
2583 struct thread *a_td;
2587 fuse_vnop_getextattr(struct vop_getextattr_args *ap)
2589 struct vnode *vp = ap->a_vp;
2590 struct uio *uio = ap->a_uio;
2591 struct fuse_dispatcher fdi;
2592 struct fuse_getxattr_in *get_xattr_in;
2593 struct fuse_getxattr_out *get_xattr_out;
2594 struct mount *mp = vnode_mount(vp);
2595 struct thread *td = ap->a_td;
2596 struct ucred *cred = ap->a_cred;
2602 if (fuse_isdeadfs(vp))
2605 if (fsess_not_impl(mp, FUSE_GETXATTR))
2608 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD);
2612 /* Default to looking for user attributes. */
2613 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2614 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2616 prefix = EXTATTR_NAMESPACE_USER_STRING;
2618 len = strlen(prefix) + sizeof(extattr_namespace_separator) +
2619 strlen(ap->a_name) + 1;
2621 fdisp_init(&fdi, len + sizeof(*get_xattr_in));
2622 fdisp_make_vp(&fdi, FUSE_GETXATTR, vp, td, cred);
2624 get_xattr_in = fdi.indata;
2626 * Check to see whether we're querying the available size or
2627 * issuing the actual request. If we pass in 0, we get back struct
2628 * fuse_getxattr_out. If we pass in a non-zero size, we get back
2629 * that much data, without the struct fuse_getxattr_out header.
2632 get_xattr_in->size = 0;
2634 get_xattr_in->size = uio->uio_resid;
2636 attr_str = (char *)fdi.indata + sizeof(*get_xattr_in);
2637 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
2640 err = fdisp_wait_answ(&fdi);
2642 if (err == ENOSYS) {
2643 fsess_set_notimpl(mp, FUSE_GETXATTR);
2649 get_xattr_out = fdi.answ;
2651 if (ap->a_size != NULL)
2652 *ap->a_size = get_xattr_out->size;
2655 err = uiomove(fdi.answ, fdi.iosize, uio);
2658 fdisp_destroy(&fdi);
2663 struct vop_setextattr_args {
2664 struct vop_generic_args a_gen;
2666 int a_attrnamespace;
2669 struct ucred *a_cred;
2670 struct thread *a_td;
2674 fuse_vnop_setextattr(struct vop_setextattr_args *ap)
2676 struct vnode *vp = ap->a_vp;
2677 struct uio *uio = ap->a_uio;
2678 struct fuse_dispatcher fdi;
2679 struct fuse_setxattr_in *set_xattr_in;
2680 struct mount *mp = vnode_mount(vp);
2681 struct thread *td = ap->a_td;
2682 struct ucred *cred = ap->a_cred;
2688 if (fuse_isdeadfs(vp))
2691 if (fsess_not_impl(mp, FUSE_SETXATTR))
2694 if (vfs_isrdonly(mp))
2697 /* Deleting xattrs must use VOP_DELETEEXTATTR instead */
2698 if (ap->a_uio == NULL) {
2700 * If we got here as fallback from VOP_DELETEEXTATTR, then
2701 * return EOPNOTSUPP.
2703 if (fsess_not_impl(mp, FUSE_REMOVEXATTR))
2704 return (EOPNOTSUPP);
2709 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td,
2714 /* Default to looking for user attributes. */
2715 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2716 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2718 prefix = EXTATTR_NAMESPACE_USER_STRING;
2720 len = strlen(prefix) + sizeof(extattr_namespace_separator) +
2721 strlen(ap->a_name) + 1;
2723 fdisp_init(&fdi, len + sizeof(*set_xattr_in) + uio->uio_resid);
2724 fdisp_make_vp(&fdi, FUSE_SETXATTR, vp, td, cred);
2726 set_xattr_in = fdi.indata;
2727 set_xattr_in->size = uio->uio_resid;
2729 attr_str = (char *)fdi.indata + sizeof(*set_xattr_in);
2730 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
2733 err = uiomove((char *)fdi.indata + sizeof(*set_xattr_in) + len,
2734 uio->uio_resid, uio);
2739 err = fdisp_wait_answ(&fdi);
2741 if (err == ENOSYS) {
2742 fsess_set_notimpl(mp, FUSE_SETXATTR);
2745 if (err == ERESTART) {
2746 /* Can't restart after calling uiomove */
2751 fdisp_destroy(&fdi);
2756 * The Linux / FUSE extended attribute list is simply a collection of
2757 * NUL-terminated strings. The FreeBSD extended attribute list is a single
2758 * byte length followed by a non-NUL terminated string. So, this allows
2759 * conversion of the Linux / FUSE format to the FreeBSD format in place.
2760 * Linux attribute names are reported with the namespace as a prefix (e.g.
2761 * "user.attribute_name"), but in FreeBSD they are reported without the
2762 * namespace prefix (e.g. "attribute_name"). So, we're going from:
2764 * user.attr_name1\0user.attr_name2\0
2768 * <num>attr_name1<num>attr_name2
2770 * Where "<num>" is a single byte number of characters in the attribute name.
2773 * prefix - exattr namespace prefix string
2774 * list, list_len - input list with namespace prefixes
2775 * bsd_list, bsd_list_len - output list compatible with bsd vfs
2778 fuse_xattrlist_convert(char *prefix, const char *list, int list_len,
2779 char *bsd_list, int *bsd_list_len)
2781 int len, pos, dist_to_next, prefix_len;
2785 prefix_len = strlen(prefix);
2787 while (pos < list_len && list[pos] != '\0') {
2788 dist_to_next = strlen(&list[pos]) + 1;
2789 if (bcmp(&list[pos], prefix, prefix_len) == 0 &&
2790 list[pos + prefix_len] == extattr_namespace_separator) {
2791 len = dist_to_next -
2792 (prefix_len + sizeof(extattr_namespace_separator)) - 1;
2793 if (len >= EXTATTR_MAXNAMELEN)
2794 return (ENAMETOOLONG);
2796 bsd_list[*bsd_list_len] = len;
2797 memcpy(&bsd_list[*bsd_list_len + 1],
2798 &list[pos + prefix_len +
2799 sizeof(extattr_namespace_separator)], len);
2801 *bsd_list_len += len + 1;
2804 pos += dist_to_next;
2811 * List extended attributes
2813 * The FUSE_LISTXATTR operation is based on Linux's listxattr(2) syscall, which
2814 * has a number of differences compared to its FreeBSD equivalent,
2815 * extattr_list_file:
2817 * - FUSE_LISTXATTR returns all extended attributes across all namespaces,
2818 * whereas listxattr(2) only returns attributes for a single namespace
2819 * - FUSE_LISTXATTR prepends each attribute name with "namespace."
2820 * - If the provided buffer is not large enough to hold the result,
2821 * FUSE_LISTXATTR should return ERANGE, whereas listxattr is expected to
2822 * return as many results as will fit.
2825 struct vop_listextattr_args {
2826 struct vop_generic_args a_gen;
2828 int a_attrnamespace;
2831 struct ucred *a_cred;
2832 struct thread *a_td;
2836 fuse_vnop_listextattr(struct vop_listextattr_args *ap)
2838 struct vnode *vp = ap->a_vp;
2839 struct uio *uio = ap->a_uio;
2840 struct fuse_dispatcher fdi;
2841 struct fuse_listxattr_in *list_xattr_in;
2842 struct fuse_listxattr_out *list_xattr_out;
2843 struct mount *mp = vnode_mount(vp);
2844 struct thread *td = ap->a_td;
2845 struct ucred *cred = ap->a_cred;
2847 char *bsd_list = NULL;
2853 if (fuse_isdeadfs(vp))
2856 if (fsess_not_impl(mp, FUSE_LISTXATTR))
2859 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD);
2864 * Add space for a NUL and the period separator if enabled.
2865 * Default to looking for user attributes.
2867 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2868 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2870 prefix = EXTATTR_NAMESPACE_USER_STRING;
2872 fdisp_init(&fdi, sizeof(*list_xattr_in));
2873 fdisp_make_vp(&fdi, FUSE_LISTXATTR, vp, td, cred);
2876 * Retrieve Linux / FUSE compatible list size.
2878 list_xattr_in = fdi.indata;
2879 list_xattr_in->size = 0;
2881 err = fdisp_wait_answ(&fdi);
2883 if (err == ENOSYS) {
2884 fsess_set_notimpl(mp, FUSE_LISTXATTR);
2890 list_xattr_out = fdi.answ;
2891 linux_list_len = list_xattr_out->size;
2892 if (linux_list_len == 0) {
2893 if (ap->a_size != NULL)
2894 *ap->a_size = linux_list_len;
2899 * Retrieve Linux / FUSE compatible list values.
2901 fdisp_refresh_vp(&fdi, FUSE_LISTXATTR, vp, td, cred);
2902 list_xattr_in = fdi.indata;
2903 list_xattr_in->size = linux_list_len;
2905 err = fdisp_wait_answ(&fdi);
2906 if (err == ERANGE) {
2908 * Race detected. The attribute list must've grown since the
2909 * first FUSE_LISTXATTR call. Start over. Go all the way back
2910 * to userland so we can process signals, if necessary, before
2915 } else if (err != 0)
2918 linux_list = fdi.answ;
2919 /* FUSE doesn't allow the server to return more data than requested */
2920 if (fdi.iosize > linux_list_len) {
2921 struct fuse_data *data = fuse_get_mpdata(mp);
2923 fuse_warn(data, FSESS_WARN_LSEXTATTR_LONG,
2925 "more extended attribute data than requested; "
2926 "should've returned ERANGE instead.");
2928 /* But returning less data is fine */
2929 linux_list_len = fdi.iosize;
2933 * Retrieve the BSD compatible list values.
2934 * The Linux / FUSE attribute list format isn't the same
2935 * as FreeBSD's format. So we need to transform it into
2936 * FreeBSD's format before giving it to the user.
2938 bsd_list = malloc(linux_list_len, M_TEMP, M_WAITOK);
2939 err = fuse_xattrlist_convert(prefix, linux_list, linux_list_len,
2940 bsd_list, &bsd_list_len);
2944 if (ap->a_size != NULL)
2945 *ap->a_size = bsd_list_len;
2948 err = uiomove(bsd_list, bsd_list_len, uio);
2951 free(bsd_list, M_TEMP);
2952 fdisp_destroy(&fdi);
2957 struct vop_deallocate_args {
2958 struct vop_generic_args a_gen;
2964 struct ucred *a_cred;
2968 fuse_vnop_deallocate(struct vop_deallocate_args *ap)
2970 struct vnode *vp = ap->a_vp;
2971 struct mount *mp = vnode_mount(vp);
2972 struct fuse_filehandle *fufh;
2973 struct fuse_dispatcher fdi;
2974 struct fuse_fallocate_in *ffi;
2975 struct ucred *cred = ap->a_cred;
2976 pid_t pid = curthread->td_proc->p_pid;
2977 off_t *len = ap->a_len;
2978 off_t *offset = ap->a_offset;
2979 int ioflag = ap->a_ioflag;
2982 bool closefufh = false;
2984 if (fuse_isdeadfs(vp))
2987 if (vfs_isrdonly(mp))
2990 if (fsess_not_impl(mp, FUSE_FALLOCATE))
2993 err = fuse_filehandle_getrw(vp, FWRITE, &fufh, cred, pid);
2994 if (err == EBADF && vnode_mount(vp)->mnt_flag & MNT_EXPORTED) {
2996 * nfsd will do I/O without first doing VOP_OPEN. We
2997 * must implicitly open the file here
2999 err = fuse_filehandle_open(vp, FWRITE, &fufh, curthread, cred);
3005 fuse_vnode_update(vp, FN_MTIMECHANGE | FN_CTIMECHANGE);
3007 err = fuse_vnode_size(vp, &filesize, cred, curthread);
3010 fuse_inval_buf_range(vp, filesize, *offset, *offset + *len);
3012 fdisp_init(&fdi, sizeof(*ffi));
3013 fdisp_make_vp(&fdi, FUSE_FALLOCATE, vp, curthread, cred);
3015 ffi->fh = fufh->fh_id;
3016 ffi->offset = *offset;
3019 * FreeBSD's fspacectl is equivalent to Linux's fallocate with
3020 * mode == FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE
3022 ffi->mode = FUSE_FALLOC_FL_PUNCH_HOLE | FUSE_FALLOC_FL_KEEP_SIZE;
3023 err = fdisp_wait_answ(&fdi);
3025 if (err == ENOSYS) {
3026 fdisp_destroy(&fdi);
3027 fsess_set_notimpl(mp, FUSE_FALLOCATE);
3029 } else if (err == EOPNOTSUPP) {
3031 * The file system server does not support FUSE_FALLOCATE with
3032 * the supplied mode for this particular file.
3034 fdisp_destroy(&fdi);
3038 * Clip the returned offset to EoF. Do it here rather than
3039 * before FUSE_FALLOCATE just in case the kernel's cached file
3040 * size is out of date. Unfortunately, FUSE does not return
3041 * any information about filesize from that operation.
3043 *offset = MIN(*offset + *len, filesize);
3045 fuse_vnode_undirty_cached_timestamps(vp, false);
3046 fuse_internal_clear_suid_on_write(vp, cred, curthread);
3048 if (ioflag & IO_SYNC)
3049 err = fuse_internal_fsync(vp, curthread, MNT_WAIT,
3054 fdisp_destroy(&fdi);
3056 fuse_filehandle_close(vp, fufh, curthread, cred);
3062 fuse_filehandle_close(vp, fufh, curthread, cred);
3064 return (vop_stddeallocate(ap));
3068 struct vop_deleteextattr_args {
3069 struct vop_generic_args a_gen;
3071 int a_attrnamespace;
3073 struct ucred *a_cred;
3074 struct thread *a_td;
3078 fuse_vnop_deleteextattr(struct vop_deleteextattr_args *ap)
3080 struct vnode *vp = ap->a_vp;
3081 struct fuse_dispatcher fdi;
3082 struct mount *mp = vnode_mount(vp);
3083 struct thread *td = ap->a_td;
3084 struct ucred *cred = ap->a_cred;
3090 if (fuse_isdeadfs(vp))
3093 if (fsess_not_impl(mp, FUSE_REMOVEXATTR))
3096 if (vfs_isrdonly(mp))
3099 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td,
3104 /* Default to looking for user attributes. */
3105 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
3106 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
3108 prefix = EXTATTR_NAMESPACE_USER_STRING;
3110 len = strlen(prefix) + sizeof(extattr_namespace_separator) +
3111 strlen(ap->a_name) + 1;
3113 fdisp_init(&fdi, len);
3114 fdisp_make_vp(&fdi, FUSE_REMOVEXATTR, vp, td, cred);
3116 attr_str = fdi.indata;
3117 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
3120 err = fdisp_wait_answ(&fdi);
3121 if (err == ENOSYS) {
3122 fsess_set_notimpl(mp, FUSE_REMOVEXATTR);
3126 fdisp_destroy(&fdi);
3131 struct vnop_print_args {
3136 fuse_vnop_print(struct vop_print_args *ap)
3138 struct fuse_vnode_data *fvdat = VTOFUD(ap->a_vp);
3140 printf("nodeid: %ju, parent nodeid: %ju, nlookup: %ju, flag: %#x\n",
3141 (uintmax_t)VTOILLU(ap->a_vp), (uintmax_t)fvdat->parent_nid,
3142 (uintmax_t)fvdat->nlookup,
3149 * Get an NFS filehandle for a FUSE file.
3151 * This will only work for FUSE file systems that guarantee the uniqueness of
3152 * nodeid:generation, which most don't.
3156 IN struct vnode *a_vp;
3157 IN struct fid *a_fhp;
3161 fuse_vnop_vptofh(struct vop_vptofh_args *ap)
3163 struct vnode *vp = ap->a_vp;
3164 struct fuse_vnode_data *fvdat = VTOFUD(vp);
3165 struct fuse_fid *fhp = (struct fuse_fid *)(ap->a_fhp);
3166 _Static_assert(sizeof(struct fuse_fid) <= sizeof(struct fid),
3167 "FUSE fid type is too big");
3168 struct mount *mp = vnode_mount(vp);
3169 struct fuse_data *data = fuse_get_mpdata(mp);
3173 if (!(data->dataflags & FSESS_EXPORT_SUPPORT)) {
3174 /* NFS requires lookups for "." and ".." */
3175 SDT_PROBE2(fusefs, , vnops, trace, 1,
3176 "VOP_VPTOFH without FUSE_EXPORT_SUPPORT");
3179 if ((mp->mnt_flag & MNT_EXPORTED) &&
3180 !(data->dataflags & FSESS_NO_OPENDIR_SUPPORT))
3183 * NFS is stateless, so nfsd must reopen a directory on every
3184 * call to VOP_READDIR, passing in the d_off field from the
3185 * final dirent of the previous invocation. But without
3186 * FUSE_NO_OPENDIR_SUPPORT, the FUSE protocol does not
3187 * guarantee that d_off will be valid after a directory is
3188 * closed and reopened. So prohibit exporting FUSE file
3189 * systems that don't set that flag.
3191 * But userspace NFS servers don't have this problem.
3193 SDT_PROBE2(fusefs, , vnops, trace, 1,
3194 "VOP_VPTOFH without FUSE_NO_OPENDIR_SUPPORT");
3198 err = fuse_internal_getattr(vp, &va, curthread->td_ucred, curthread);
3202 /*ip = VTOI(ap->a_vp);*/
3203 /*ufhp = (struct ufid *)ap->a_fhp;*/
3204 fhp->len = sizeof(struct fuse_fid);
3205 fhp->nid = fvdat->nid;
3206 if (fvdat->generation <= UINT32_MAX)
3207 fhp->gen = fvdat->generation;