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>
73 #include <sys/malloc.h>
74 #include <sys/queue.h>
75 #include <sys/limits.h>
77 #include <sys/rwlock.h>
80 #include <sys/mount.h>
81 #include <sys/vnode.h>
82 #include <sys/namei.h>
83 #include <sys/extattr.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>
93 #include <sys/vmmeter.h>
96 #include <vm/vm_extern.h>
98 #include <vm/vm_map.h>
99 #include <vm/vm_page.h>
100 #include <vm/vm_param.h>
101 #include <vm/vm_object.h>
102 #include <vm/vm_pager.h>
103 #include <vm/vnode_pager.h>
104 #include <vm/vm_object.h>
107 #include "fuse_file.h"
108 #include "fuse_internal.h"
109 #include "fuse_ipc.h"
110 #include "fuse_node.h"
113 #include <sys/priv.h>
115 /* Maximum number of hardlinks to a single FUSE file */
116 #define FUSE_LINK_MAX UINT32_MAX
118 SDT_PROVIDER_DECLARE(fusefs);
121 * arg0: verbosity. Higher numbers give more verbose messages
122 * arg1: Textual message
124 SDT_PROBE_DEFINE2(fusefs, , vnops, trace, "int", "char*");
127 static vop_access_t fuse_vnop_access;
128 static vop_advlock_t fuse_vnop_advlock;
129 static vop_bmap_t fuse_vnop_bmap;
130 static vop_close_t fuse_fifo_close;
131 static vop_close_t fuse_vnop_close;
132 static vop_create_t fuse_vnop_create;
133 static vop_deleteextattr_t fuse_vnop_deleteextattr;
134 static vop_fdatasync_t fuse_vnop_fdatasync;
135 static vop_fsync_t fuse_vnop_fsync;
136 static vop_getattr_t fuse_vnop_getattr;
137 static vop_getextattr_t fuse_vnop_getextattr;
138 static vop_inactive_t fuse_vnop_inactive;
139 static vop_link_t fuse_vnop_link;
140 static vop_listextattr_t fuse_vnop_listextattr;
141 static vop_lookup_t fuse_vnop_lookup;
142 static vop_mkdir_t fuse_vnop_mkdir;
143 static vop_mknod_t fuse_vnop_mknod;
144 static vop_open_t fuse_vnop_open;
145 static vop_pathconf_t fuse_vnop_pathconf;
146 static vop_read_t fuse_vnop_read;
147 static vop_readdir_t fuse_vnop_readdir;
148 static vop_readlink_t fuse_vnop_readlink;
149 static vop_reclaim_t fuse_vnop_reclaim;
150 static vop_remove_t fuse_vnop_remove;
151 static vop_rename_t fuse_vnop_rename;
152 static vop_rmdir_t fuse_vnop_rmdir;
153 static vop_setattr_t fuse_vnop_setattr;
154 static vop_setextattr_t fuse_vnop_setextattr;
155 static vop_strategy_t fuse_vnop_strategy;
156 static vop_symlink_t fuse_vnop_symlink;
157 static vop_write_t fuse_vnop_write;
158 static vop_getpages_t fuse_vnop_getpages;
159 static vop_print_t fuse_vnop_print;
160 static vop_vptofh_t fuse_vnop_vptofh;
162 struct vop_vector fuse_fifoops = {
163 .vop_default = &fifo_specops,
164 .vop_access = fuse_vnop_access,
165 .vop_close = fuse_fifo_close,
166 .vop_fsync = fuse_vnop_fsync,
167 .vop_getattr = fuse_vnop_getattr,
168 .vop_inactive = fuse_vnop_inactive,
169 .vop_pathconf = fuse_vnop_pathconf,
170 .vop_print = fuse_vnop_print,
171 .vop_read = VOP_PANIC,
172 .vop_reclaim = fuse_vnop_reclaim,
173 .vop_setattr = fuse_vnop_setattr,
174 .vop_write = VOP_PANIC,
175 .vop_vptofh = fuse_vnop_vptofh,
177 VFS_VOP_VECTOR_REGISTER(fuse_fifoops);
179 struct vop_vector fuse_vnops = {
180 .vop_allocate = VOP_EINVAL,
181 .vop_default = &default_vnodeops,
182 .vop_access = fuse_vnop_access,
183 .vop_advlock = fuse_vnop_advlock,
184 .vop_bmap = fuse_vnop_bmap,
185 .vop_close = fuse_vnop_close,
186 .vop_create = fuse_vnop_create,
187 .vop_deleteextattr = fuse_vnop_deleteextattr,
188 .vop_fsync = fuse_vnop_fsync,
189 .vop_fdatasync = fuse_vnop_fdatasync,
190 .vop_getattr = fuse_vnop_getattr,
191 .vop_getextattr = fuse_vnop_getextattr,
192 .vop_inactive = fuse_vnop_inactive,
194 * TODO: implement vop_ioctl after upgrading to protocol 7.16.
195 * FUSE_IOCTL was added in 7.11, but 32-bit compat is broken until
198 .vop_link = fuse_vnop_link,
199 .vop_listextattr = fuse_vnop_listextattr,
200 .vop_lookup = fuse_vnop_lookup,
201 .vop_mkdir = fuse_vnop_mkdir,
202 .vop_mknod = fuse_vnop_mknod,
203 .vop_open = fuse_vnop_open,
204 .vop_pathconf = fuse_vnop_pathconf,
206 * TODO: implement vop_poll after upgrading to protocol 7.21.
207 * FUSE_POLL was added in protocol 7.11, but it's kind of broken until
208 * 7.21, which adds the ability for the client to choose which poll
209 * events it wants, and for a client to deregister a file handle
211 .vop_read = fuse_vnop_read,
212 .vop_readdir = fuse_vnop_readdir,
213 .vop_readlink = fuse_vnop_readlink,
214 .vop_reclaim = fuse_vnop_reclaim,
215 .vop_remove = fuse_vnop_remove,
216 .vop_rename = fuse_vnop_rename,
217 .vop_rmdir = fuse_vnop_rmdir,
218 .vop_setattr = fuse_vnop_setattr,
219 .vop_setextattr = fuse_vnop_setextattr,
220 .vop_strategy = fuse_vnop_strategy,
221 .vop_symlink = fuse_vnop_symlink,
222 .vop_write = fuse_vnop_write,
223 .vop_getpages = fuse_vnop_getpages,
224 .vop_print = fuse_vnop_print,
225 .vop_vptofh = fuse_vnop_vptofh,
227 VFS_VOP_VECTOR_REGISTER(fuse_vnops);
229 uma_zone_t fuse_pbuf_zone;
231 /* Check permission for extattr operations, much like extattr_check_cred */
233 fuse_extattr_check_cred(struct vnode *vp, int ns, struct ucred *cred,
234 struct thread *td, accmode_t accmode)
236 struct mount *mp = vnode_mount(vp);
237 struct fuse_data *data = fuse_get_mpdata(mp);
238 int default_permissions = data->dataflags & FSESS_DEFAULT_PERMISSIONS;
241 * Kernel-invoked always succeeds.
247 * Do not allow privileged processes in jail to directly manipulate
251 case EXTATTR_NAMESPACE_SYSTEM:
252 if (default_permissions) {
253 return (priv_check_cred(cred, PRIV_VFS_EXTATTR_SYSTEM));
256 case EXTATTR_NAMESPACE_USER:
257 if (default_permissions) {
258 return (fuse_internal_access(vp, accmode, td, cred));
266 /* Get a filehandle for a directory */
268 fuse_filehandle_get_dir(struct vnode *vp, struct fuse_filehandle **fufhp,
269 struct ucred *cred, pid_t pid)
271 if (fuse_filehandle_get(vp, FREAD, fufhp, cred, pid) == 0)
273 return fuse_filehandle_get(vp, FEXEC, fufhp, cred, pid);
276 /* Send FUSE_FLUSH for this vnode */
278 fuse_flush(struct vnode *vp, struct ucred *cred, pid_t pid, int fflag)
280 struct fuse_flush_in *ffi;
281 struct fuse_filehandle *fufh;
282 struct fuse_dispatcher fdi;
283 struct thread *td = curthread;
284 struct mount *mp = vnode_mount(vp);
287 if (!fsess_isimpl(vnode_mount(vp), FUSE_FLUSH))
290 err = fuse_filehandle_getrw(vp, fflag, &fufh, cred, pid);
294 fdisp_init(&fdi, sizeof(*ffi));
295 fdisp_make_vp(&fdi, FUSE_FLUSH, vp, td, cred);
297 ffi->fh = fufh->fh_id;
299 * If the file has a POSIX lock then we're supposed to set lock_owner.
300 * If not, then lock_owner is undefined. So we may as well always set
303 ffi->lock_owner = td->td_proc->p_pid;
305 err = fdisp_wait_answ(&fdi);
307 fsess_set_notimpl(mp, FUSE_FLUSH);
314 /* Close wrapper for fifos. */
316 fuse_fifo_close(struct vop_close_args *ap)
318 return (fifo_specops.vop_close(ap));
322 struct vnop_access_args {
324 #if VOP_ACCESS_TAKES_ACCMODE_T
329 struct ucred *a_cred;
334 fuse_vnop_access(struct vop_access_args *ap)
336 struct vnode *vp = ap->a_vp;
337 int accmode = ap->a_accmode;
338 struct ucred *cred = ap->a_cred;
340 struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
344 if (fuse_isdeadfs(vp)) {
345 if (vnode_isvroot(vp)) {
350 if (!(data->dataflags & FSESS_INITED)) {
351 if (vnode_isvroot(vp)) {
352 if (priv_check_cred(cred, PRIV_VFS_ADMIN) ||
353 (fuse_match_cred(data->daemoncred, cred) == 0)) {
359 if (vnode_islnk(vp)) {
363 err = fuse_internal_access(vp, accmode, ap->a_td, ap->a_cred);
368 * struct vop_advlock_args {
369 * struct vop_generic_args a_gen;
370 * struct vnode *a_vp;
373 * struct flock *a_fl;
378 fuse_vnop_advlock(struct vop_advlock_args *ap)
380 struct vnode *vp = ap->a_vp;
381 struct flock *fl = ap->a_fl;
382 struct thread *td = curthread;
383 struct ucred *cred = td->td_ucred;
384 pid_t pid = td->td_proc->p_pid;
385 struct fuse_filehandle *fufh;
386 struct fuse_dispatcher fdi;
387 struct fuse_lk_in *fli;
388 struct fuse_lk_out *flo;
391 int flags = ap->a_flags;
393 dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;
395 if (fuse_isdeadfs(vp)) {
399 if (!(dataflags & FSESS_POSIX_LOCKS))
400 return vop_stdadvlock(ap);
401 /* FUSE doesn't properly support flock until protocol 7.17 */
403 return vop_stdadvlock(ap);
405 err = fuse_filehandle_get_anyflags(vp, &fufh, cred, pid);
409 fdisp_init(&fdi, sizeof(*fli));
425 fdisp_make_vp(&fdi, op, vp, td, cred);
427 fli->fh = fufh->fh_id;
428 fli->owner = fl->l_pid;
429 fli->lk.start = fl->l_start;
431 fli->lk.end = fl->l_start + fl->l_len - 1;
433 fli->lk.end = INT64_MAX;
434 fli->lk.type = fl->l_type;
435 fli->lk.pid = fl->l_pid;
437 err = fdisp_wait_answ(&fdi);
440 if (err == 0 && op == FUSE_GETLK) {
442 fl->l_type = flo->lk.type;
443 fl->l_pid = flo->lk.pid;
444 if (flo->lk.type != F_UNLCK) {
445 fl->l_start = flo->lk.start;
446 if (flo->lk.end == INT64_MAX)
449 fl->l_len = flo->lk.end - flo->lk.start + 1;
450 fl->l_start = flo->lk.start;
460 struct bufobj **a_bop;
466 fuse_vnop_bmap(struct vop_bmap_args *ap)
468 struct vnode *vp = ap->a_vp;
469 struct bufobj **bo = ap->a_bop;
470 struct thread *td = curthread;
472 struct fuse_dispatcher fdi;
473 struct fuse_bmap_in *fbi;
474 struct fuse_bmap_out *fbo;
475 struct fuse_data *data;
478 daddr_t lbn = ap->a_bn;
479 daddr_t *pbn = ap->a_bnp;
480 int *runp = ap->a_runp;
481 int *runb = ap->a_runb;
485 if (fuse_isdeadfs(vp)) {
489 mp = vnode_mount(vp);
490 data = fuse_get_mpdata(mp);
491 biosize = fuse_iosize(vp);
492 maxrun = MIN(vp->v_mount->mnt_iosize_max / biosize - 1,
493 data->max_readahead_blocks);
499 * The FUSE_BMAP operation does not include the runp and runb
500 * variables, so we must guess. Report nonzero contiguous runs so
501 * cluster_read will combine adjacent reads. It's worthwhile to reduce
502 * upcalls even if we don't know the true physical layout of the file.
504 * FUSE file systems may opt out of read clustering in two ways:
505 * * mounting with -onoclusterr
506 * * Setting max_readahead <= maxbcachebuf during FUSE_INIT
509 *runb = MIN(lbn, maxrun);
511 error = fuse_vnode_size(vp, &filesize, td->td_ucred, td);
513 *runp = MIN(MAX(0, filesize / (off_t)biosize - lbn - 1),
519 if (fsess_isimpl(mp, FUSE_BMAP)) {
520 fdisp_init(&fdi, sizeof(*fbi));
521 fdisp_make_vp(&fdi, FUSE_BMAP, vp, td, td->td_ucred);
524 fbi->blocksize = biosize;
525 error = fdisp_wait_answ(&fdi);
526 if (error == ENOSYS) {
528 fsess_set_notimpl(mp, FUSE_BMAP);
532 if (error == 0 && pbn != NULL)
539 /* If the daemon doesn't support BMAP, make up a sensible default */
541 *pbn = lbn * btodb(biosize);
546 struct vop_close_args {
549 struct ucred *a_cred;
554 fuse_vnop_close(struct vop_close_args *ap)
556 struct vnode *vp = ap->a_vp;
557 struct ucred *cred = ap->a_cred;
558 int fflag = ap->a_fflag;
559 struct thread *td = ap->a_td;
560 pid_t pid = td->td_proc->p_pid;
563 if (fuse_isdeadfs(vp))
567 if (fflag & IO_NDELAY)
570 err = fuse_flush(vp, cred, pid, fflag);
571 /* TODO: close the file handle, if we're sure it's no longer used */
572 if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {
573 fuse_vnode_savesize(vp, cred, td->td_proc->p_pid);
579 fdisp_make_mknod_for_fallback(
580 struct fuse_dispatcher *fdip,
581 struct componentname *cnp,
587 enum fuse_opcode *op)
589 struct fuse_mknod_in *fmni;
591 fdisp_init(fdip, sizeof(*fmni) + cnp->cn_namelen + 1);
593 fdisp_make(fdip, *op, vnode_mount(dvp), parentnid, td, cred);
597 memcpy((char *)fdip->indata + sizeof(*fmni), cnp->cn_nameptr,
599 ((char *)fdip->indata)[sizeof(*fmni) + cnp->cn_namelen] = '\0';
602 struct vnop_create_args {
604 struct vnode **a_vpp;
605 struct componentname *a_cnp;
610 fuse_vnop_create(struct vop_create_args *ap)
612 struct vnode *dvp = ap->a_dvp;
613 struct vnode **vpp = ap->a_vpp;
614 struct componentname *cnp = ap->a_cnp;
615 struct vattr *vap = ap->a_vap;
616 struct thread *td = cnp->cn_thread;
617 struct ucred *cred = cnp->cn_cred;
619 struct fuse_data *data;
620 struct fuse_create_in *fci;
621 struct fuse_entry_out *feo;
622 struct fuse_open_out *foo;
623 struct fuse_dispatcher fdi, fdi2;
624 struct fuse_dispatcher *fdip = &fdi;
625 struct fuse_dispatcher *fdip2 = NULL;
629 struct mount *mp = vnode_mount(dvp);
630 data = fuse_get_mpdata(mp);
631 uint64_t parentnid = VTOFUD(dvp)->nid;
632 mode_t mode = MAKEIMODE(vap->va_type, vap->va_mode);
636 if (fuse_isdeadfs(dvp))
639 /* FUSE expects sockets to be created with FUSE_MKNOD */
640 if (vap->va_type == VSOCK)
641 return fuse_internal_mknod(dvp, vpp, cnp, vap);
644 * VOP_CREATE doesn't tell us the open(2) flags, so we guess. Only a
645 * writable mode makes sense, and we might as well include readability
650 bzero(&fdi, sizeof(fdi));
652 if (vap->va_type != VREG)
655 if (!fsess_isimpl(mp, FUSE_CREATE) || vap->va_type == VSOCK) {
656 /* Fallback to FUSE_MKNOD/FUSE_OPEN */
657 fdisp_make_mknod_for_fallback(fdip, cnp, dvp, parentnid, td,
660 /* Use FUSE_CREATE */
664 fdisp_init(fdip, sizeof(*fci) + cnp->cn_namelen + 1);
665 fdisp_make(fdip, op, vnode_mount(dvp), parentnid, td, cred);
668 fci->flags = O_CREAT | flags;
669 if (fuse_libabi_geq(data, 7, 12)) {
670 insize = sizeof(*fci);
671 fci->umask = td->td_proc->p_pd->pd_cmask;
673 insize = sizeof(struct fuse_open_in);
676 memcpy((char *)fdip->indata + insize, cnp->cn_nameptr,
678 ((char *)fdip->indata)[insize + cnp->cn_namelen] = '\0';
681 err = fdisp_wait_answ(fdip);
684 if (err == ENOSYS && op == FUSE_CREATE) {
685 fsess_set_notimpl(mp, FUSE_CREATE);
687 fdisp_make_mknod_for_fallback(fdip, cnp, dvp,
688 parentnid, td, cred, mode, &op);
689 err = fdisp_wait_answ(fdip);
697 if ((err = fuse_internal_checkentry(feo, vap->va_type))) {
701 if (op == FUSE_CREATE) {
702 foo = (struct fuse_open_out*)(feo + 1);
704 /* Issue a separate FUSE_OPEN */
705 struct fuse_open_in *foi;
708 fdisp_init(fdip2, sizeof(*foi));
709 fdisp_make(fdip2, FUSE_OPEN, vnode_mount(dvp), feo->nodeid, td,
713 err = fdisp_wait_answ(fdip2);
718 err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, vap->va_type);
720 struct fuse_release_in *fri;
721 uint64_t nodeid = feo->nodeid;
722 uint64_t fh_id = foo->fh;
724 fdisp_init(fdip, sizeof(*fri));
725 fdisp_make(fdip, FUSE_RELEASE, mp, nodeid, td, cred);
729 fuse_insert_callback(fdip->tick, fuse_internal_forget_callback);
730 fuse_insert_message(fdip->tick, false);
733 ASSERT_VOP_ELOCKED(*vpp, "fuse_vnop_create");
734 fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid,
735 feo->attr_valid_nsec, NULL);
737 fuse_filehandle_init(*vpp, FUFH_RDWR, NULL, td, cred, foo);
738 fuse_vnode_open(*vpp, foo->open_flags, td);
740 * Purge the parent's attribute cache because the daemon should've
741 * updated its mtime and ctime
743 fuse_vnode_clear_attr_cache(dvp);
744 cache_purge_negative(dvp);
748 fdisp_destroy(fdip2);
754 struct vnop_fdatasync_args {
755 struct vop_generic_args a_gen;
757 struct thread * a_td;
761 fuse_vnop_fdatasync(struct vop_fdatasync_args *ap)
763 struct vnode *vp = ap->a_vp;
764 struct thread *td = ap->a_td;
765 int waitfor = MNT_WAIT;
769 if (fuse_isdeadfs(vp)) {
772 if ((err = vop_stdfdatasync_buf(ap)))
775 return fuse_internal_fsync(vp, td, waitfor, true);
779 struct vnop_fsync_args {
780 struct vop_generic_args a_gen;
783 struct thread * a_td;
787 fuse_vnop_fsync(struct vop_fsync_args *ap)
789 struct vnode *vp = ap->a_vp;
790 struct thread *td = ap->a_td;
791 int waitfor = ap->a_waitfor;
794 if (fuse_isdeadfs(vp)) {
797 if ((err = vop_stdfsync(ap)))
800 return fuse_internal_fsync(vp, td, waitfor, false);
804 struct vnop_getattr_args {
807 struct ucred *a_cred;
812 fuse_vnop_getattr(struct vop_getattr_args *ap)
814 struct vnode *vp = ap->a_vp;
815 struct vattr *vap = ap->a_vap;
816 struct ucred *cred = ap->a_cred;
817 struct thread *td = curthread;
822 dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;
824 /* Note that we are not bailing out on a dead file system just yet. */
826 if (!(dataflags & FSESS_INITED)) {
827 if (!vnode_isvroot(vp)) {
828 fdata_set_dead(fuse_get_mpdata(vnode_mount(vp)));
835 err = fuse_internal_getattr(vp, vap, cred, td);
836 if (err == ENOTCONN && vnode_isvroot(vp)) {
837 /* see comment in fuse_vfsop_statfs() */
844 bzero(vap, sizeof(*vap));
845 vap->va_type = vnode_vtype(vp);
851 struct vnop_inactive_args {
856 fuse_vnop_inactive(struct vop_inactive_args *ap)
858 struct vnode *vp = ap->a_vp;
859 struct thread *td = curthread;
861 struct fuse_vnode_data *fvdat = VTOFUD(vp);
862 struct fuse_filehandle *fufh, *fufh_tmp;
866 LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) {
867 if (need_flush && vp->v_type == VREG) {
868 if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {
869 fuse_vnode_savesize(vp, NULL, 0);
871 if ((fvdat->flag & FN_REVOKED) != 0)
872 fuse_io_invalbuf(vp, td);
874 fuse_io_flushbuf(vp, MNT_WAIT, td);
877 fuse_filehandle_close(vp, fufh, td, NULL);
880 if ((fvdat->flag & FN_REVOKED) != 0)
887 struct vnop_link_args {
888 struct vnode *a_tdvp;
890 struct componentname *a_cnp;
894 fuse_vnop_link(struct vop_link_args *ap)
896 struct vnode *vp = ap->a_vp;
897 struct vnode *tdvp = ap->a_tdvp;
898 struct componentname *cnp = ap->a_cnp;
900 struct vattr *vap = VTOVA(vp);
902 struct fuse_dispatcher fdi;
903 struct fuse_entry_out *feo;
904 struct fuse_link_in fli;
908 if (fuse_isdeadfs(vp)) {
911 if (vnode_mount(tdvp) != vnode_mount(vp)) {
916 * This is a seatbelt check to protect naive userspace filesystems from
917 * themselves and the limitations of the FUSE IPC protocol. If a
918 * filesystem does not allow attribute caching, assume it is capable of
919 * validating that nlink does not overflow.
921 if (vap != NULL && vap->va_nlink >= FUSE_LINK_MAX)
923 fli.oldnodeid = VTOI(vp);
926 fuse_internal_newentry_makerequest(vnode_mount(tdvp), VTOI(tdvp), cnp,
927 FUSE_LINK, &fli, sizeof(fli), &fdi);
928 if ((err = fdisp_wait_answ(&fdi))) {
933 err = fuse_internal_checkentry(feo, vnode_vtype(vp));
936 * Purge the parent's attribute cache because the daemon
937 * should've updated its mtime and ctime
939 fuse_vnode_clear_attr_cache(tdvp);
940 fuse_internal_cache_attrs(vp, &feo->attr, feo->attr_valid,
941 feo->attr_valid_nsec, NULL);
948 struct fuse_lookup_alloc_arg {
949 struct fuse_entry_out *feo;
950 struct componentname *cnp;
955 /* Callback for vn_get_ino */
957 fuse_lookup_alloc(struct mount *mp, void *arg, int lkflags, struct vnode **vpp)
959 struct fuse_lookup_alloc_arg *flaa = arg;
961 return fuse_vnode_get(mp, flaa->feo, flaa->nid, NULL, vpp, flaa->cnp,
965 SDT_PROBE_DEFINE3(fusefs, , vnops, cache_lookup,
966 "int", "struct timespec*", "struct timespec*");
967 SDT_PROBE_DEFINE2(fusefs, , vnops, lookup_cache_incoherent,
968 "struct vnode*", "struct fuse_entry_out*");
970 struct vnop_lookup_args {
971 struct vnodeop_desc *a_desc;
973 struct vnode **a_vpp;
974 struct componentname *a_cnp;
978 fuse_vnop_lookup(struct vop_lookup_args *ap)
980 struct vnode *dvp = ap->a_dvp;
981 struct vnode **vpp = ap->a_vpp;
982 struct componentname *cnp = ap->a_cnp;
983 struct thread *td = cnp->cn_thread;
984 struct ucred *cred = cnp->cn_cred;
986 int nameiop = cnp->cn_nameiop;
987 int flags = cnp->cn_flags;
988 int wantparent = flags & (LOCKPARENT | WANTPARENT);
989 int islastcn = flags & ISLASTCN;
990 struct mount *mp = vnode_mount(dvp);
991 struct fuse_data *data = fuse_get_mpdata(mp);
992 int default_permissions = data->dataflags & FSESS_DEFAULT_PERMISSIONS;
996 struct vnode *vp = NULL;
998 struct fuse_dispatcher fdi;
999 bool did_lookup = false;
1000 struct fuse_entry_out *feo = NULL;
1001 enum vtype vtyp; /* vnode type of target */
1002 off_t filesize; /* filesize of target */
1006 if (fuse_isdeadfs(dvp)) {
1010 if (!vnode_isdir(dvp))
1013 if (islastcn && vfs_isrdonly(mp) && (nameiop != LOOKUP))
1016 if ((cnp->cn_flags & NOEXECCHECK) != 0)
1017 cnp->cn_flags &= ~NOEXECCHECK;
1018 else if ((err = fuse_internal_access(dvp, VEXEC, td, cred)))
1021 if (flags & ISDOTDOT) {
1022 KASSERT(VTOFUD(dvp)->flag & FN_PARENT_NID,
1023 ("Looking up .. is TODO"));
1024 nid = VTOFUD(dvp)->parent_nid;
1027 /* .. is obviously a directory */
1030 } else if (cnp->cn_namelen == 1 && *(cnp->cn_nameptr) == '.') {
1032 /* . is obviously a directory */
1036 struct timespec now, timeout;
1037 int ncpticks; /* here to accomodate for API contract */
1039 err = cache_lookup(dvp, vpp, cnp, &timeout, &ncpticks);
1040 getnanouptime(&now);
1041 SDT_PROBE3(fusefs, , vnops, cache_lookup, err, &timeout, &now);
1043 case -1: /* positive match */
1044 if (timespeccmp(&timeout, &now, >)) {
1045 counter_u64_add(fuse_lookup_cache_hits, 1);
1048 counter_u64_add(fuse_lookup_cache_misses, 1);
1050 &VTOFUD(*vpp)->entry_cache_timeout);
1061 case 0: /* no match in cache */
1062 counter_u64_add(fuse_lookup_cache_misses, 1);
1065 case ENOENT: /* negative match */
1066 getnanouptime(&now);
1067 if (timespeccmp(&timeout, &now, <=)) {
1069 cache_purge_negative(dvp);
1078 fdisp_init(&fdi, cnp->cn_namelen + 1);
1079 fdisp_make(&fdi, FUSE_LOOKUP, mp, nid, td, cred);
1081 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
1082 ((char *)fdi.indata)[cnp->cn_namelen] = '\0';
1083 lookup_err = fdisp_wait_answ(&fdi);
1087 /* lookup call succeeded */
1088 feo = (struct fuse_entry_out *)fdi.answ;
1091 /* zero nodeid means ENOENT and cache it */
1092 struct timespec timeout;
1094 fdi.answ_stat = ENOENT;
1095 lookup_err = ENOENT;
1096 if (cnp->cn_flags & MAKEENTRY) {
1097 fuse_validity_2_timespec(feo, &timeout);
1098 cache_enter_time(dvp, *vpp, cnp,
1101 } else if (nid == FUSE_ROOT_ID) {
1102 lookup_err = EINVAL;
1104 vtyp = IFTOVT(feo->attr.mode);
1105 filesize = feo->attr.size;
1107 if (lookup_err && (!fdi.answ_stat || lookup_err != ENOENT)) {
1108 fdisp_destroy(&fdi);
1112 /* lookup_err, if non-zero, must be ENOENT at this point */
1115 /* Entry not found */
1116 if ((nameiop == CREATE || nameiop == RENAME) && islastcn) {
1117 if (default_permissions)
1118 err = fuse_internal_access(dvp, VWRITE, td,
1124 * Set the SAVENAME flag to hold onto the
1125 * pathname for use later in VOP_CREATE or
1128 cnp->cn_flags |= SAVENAME;
1136 /* Entry was found */
1137 if (flags & ISDOTDOT) {
1138 struct fuse_lookup_alloc_arg flaa;
1144 err = vn_vget_ino_gen(dvp, fuse_lookup_alloc, &flaa, 0,
1147 } else if (nid == VTOI(dvp)) {
1151 struct fuse_vnode_data *fvdat;
1154 err = fuse_vnode_get(vnode_mount(dvp), feo, nid, dvp,
1161 * In the case where we are looking up a FUSE node
1162 * represented by an existing cached vnode, and the
1163 * true size reported by FUSE_LOOKUP doesn't match
1164 * the vnode's cached size, then any cached writes
1165 * beyond the file's current size are lost.
1168 * * following attribute cache expiration, or
1169 * * due a bug in the daemon, or
1172 if (vnode_isreg(vp) &&
1173 ((filesize != fvdat->cached_attrs.va_size &&
1174 fvdat->flag & FN_SIZECHANGE) ||
1175 ((vap = VTOVA(vp)) &&
1176 filesize != vap->va_size)))
1178 SDT_PROBE2(fusefs, , vnops, lookup_cache_incoherent, vp, feo);
1179 fvdat->flag &= ~FN_SIZECHANGE;
1181 * The server changed the file's size even
1182 * though we had it cached, or had dirty writes
1185 printf("%s: cache incoherent on %s! "
1186 "Buggy FUSE server detected. To prevent "
1187 "data corruption, disable the data cache "
1188 "by mounting with -o direct_io, or as "
1189 "directed otherwise by your FUSE server's "
1190 "documentation\n", __func__,
1191 vnode_mount(vp)->mnt_stat.f_mntonname);
1192 int iosize = fuse_iosize(vp);
1193 v_inval_buf_range(vp, 0, INT64_MAX, iosize);
1197 fuse_internal_cache_attrs(*vpp, &feo->attr,
1198 feo->attr_valid, feo->attr_valid_nsec, NULL);
1199 fuse_validity_2_bintime(feo->entry_valid,
1200 feo->entry_valid_nsec,
1201 &fvdat->entry_cache_timeout);
1203 if ((nameiop == DELETE || nameiop == RENAME) &&
1204 islastcn && default_permissions)
1206 struct vattr dvattr;
1208 err = fuse_internal_access(dvp, VWRITE, td,
1213 * if the parent's sticky bit is set, check
1214 * whether we're allowed to remove the file.
1215 * Need to figure out the vnode locking to make
1218 fuse_internal_getattr(dvp, &dvattr, cred, td);
1219 if ((dvattr.va_mode & S_ISTXT) &&
1220 fuse_internal_access(dvp, VADMIN, td,
1222 fuse_internal_access(*vpp, VADMIN, td,
1230 (nameiop == DELETE) ||
1231 (nameiop == RENAME && wantparent))) {
1232 cnp->cn_flags |= SAVENAME;
1238 if (vp != NULL && dvp != vp)
1240 else if (vp != NULL)
1245 fdisp_destroy(&fdi);
1251 struct vnop_mkdir_args {
1252 struct vnode *a_dvp;
1253 struct vnode **a_vpp;
1254 struct componentname *a_cnp;
1255 struct vattr *a_vap;
1259 fuse_vnop_mkdir(struct vop_mkdir_args *ap)
1261 struct vnode *dvp = ap->a_dvp;
1262 struct vnode **vpp = ap->a_vpp;
1263 struct componentname *cnp = ap->a_cnp;
1264 struct vattr *vap = ap->a_vap;
1266 struct fuse_mkdir_in fmdi;
1268 if (fuse_isdeadfs(dvp)) {
1271 fmdi.mode = MAKEIMODE(vap->va_type, vap->va_mode);
1272 fmdi.umask = curthread->td_proc->p_pd->pd_cmask;
1274 return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKDIR, &fmdi,
1275 sizeof(fmdi), VDIR));
1279 struct vnop_mknod_args {
1280 struct vnode *a_dvp;
1281 struct vnode **a_vpp;
1282 struct componentname *a_cnp;
1283 struct vattr *a_vap;
1287 fuse_vnop_mknod(struct vop_mknod_args *ap)
1290 struct vnode *dvp = ap->a_dvp;
1291 struct vnode **vpp = ap->a_vpp;
1292 struct componentname *cnp = ap->a_cnp;
1293 struct vattr *vap = ap->a_vap;
1295 if (fuse_isdeadfs(dvp))
1298 return fuse_internal_mknod(dvp, vpp, cnp, vap);
1302 struct vop_open_args {
1305 struct ucred *a_cred;
1306 struct thread *a_td;
1307 int a_fdidx; / struct file *a_fp;
1311 fuse_vnop_open(struct vop_open_args *ap)
1313 struct vnode *vp = ap->a_vp;
1314 int a_mode = ap->a_mode;
1315 struct thread *td = ap->a_td;
1316 struct ucred *cred = ap->a_cred;
1317 pid_t pid = td->td_proc->p_pid;
1318 struct fuse_vnode_data *fvdat;
1320 if (fuse_isdeadfs(vp))
1322 if (vp->v_type == VCHR || vp->v_type == VBLK || vp->v_type == VFIFO)
1323 return (EOPNOTSUPP);
1324 if ((a_mode & (FREAD | FWRITE | FEXEC)) == 0)
1329 if (fuse_filehandle_validrw(vp, a_mode, cred, pid)) {
1330 fuse_vnode_open(vp, 0, td);
1334 return fuse_filehandle_open(vp, a_mode, NULL, td, cred);
1338 fuse_vnop_pathconf(struct vop_pathconf_args *ap)
1341 switch (ap->a_name) {
1342 case _PC_FILESIZEBITS:
1346 *ap->a_retval = NAME_MAX;
1349 *ap->a_retval = MIN(LONG_MAX, FUSE_LINK_MAX);
1351 case _PC_SYMLINK_MAX:
1352 *ap->a_retval = MAXPATHLEN;
1358 return (vop_stdpathconf(ap));
1363 struct vnop_read_args {
1367 struct ucred *a_cred;
1371 fuse_vnop_read(struct vop_read_args *ap)
1373 struct vnode *vp = ap->a_vp;
1374 struct uio *uio = ap->a_uio;
1375 int ioflag = ap->a_ioflag;
1376 struct ucred *cred = ap->a_cred;
1377 pid_t pid = curthread->td_proc->p_pid;
1379 if (fuse_isdeadfs(vp)) {
1383 if (VTOFUD(vp)->flag & FN_DIRECTIO) {
1384 ioflag |= IO_DIRECT;
1387 return fuse_io_dispatch(vp, uio, ioflag, cred, pid);
1391 struct vnop_readdir_args {
1394 struct ucred *a_cred;
1401 fuse_vnop_readdir(struct vop_readdir_args *ap)
1403 struct vnode *vp = ap->a_vp;
1404 struct uio *uio = ap->a_uio;
1405 struct ucred *cred = ap->a_cred;
1406 struct fuse_filehandle *fufh = NULL;
1407 struct fuse_iov cookediov;
1413 bool closefufh = false;
1414 pid_t pid = curthread->td_proc->p_pid;
1418 if (fuse_isdeadfs(vp)) {
1421 if ( /* XXXIP ((uio_iovcnt(uio) > 1)) || */
1422 (uio_resid(uio) < sizeof(struct dirent))) {
1426 tresid = uio->uio_resid;
1427 startoff = uio->uio_offset;
1428 err = fuse_filehandle_get_dir(vp, &fufh, cred, pid);
1429 if (err == EBADF && vnode_mount(vp)->mnt_flag & MNT_EXPORTED) {
1431 * nfsd will do VOP_READDIR without first doing VOP_OPEN. We
1432 * must implicitly open the directory here
1434 err = fuse_filehandle_open(vp, FREAD, &fufh, curthread, cred);
1437 * When a directory is opened, it must be read from
1438 * the beginning. Hopefully, the "startoff" still
1439 * exists as an offset cookie for the directory.
1440 * If not, it will read the entire directory without
1441 * returning any entries and just return eof.
1443 uio->uio_offset = 0;
1449 if (ap->a_ncookies != NULL) {
1450 ncookies = uio->uio_resid /
1451 (offsetof(struct dirent, d_name) + 4) + 1;
1452 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK);
1453 *ap->a_ncookies = ncookies;
1454 *ap->a_cookies = cookies;
1459 #define DIRCOOKEDSIZE FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + MAXNAMLEN + 1)
1460 fiov_init(&cookediov, DIRCOOKEDSIZE);
1462 err = fuse_internal_readdir(vp, uio, startoff, fufh, &cookediov,
1463 &ncookies, cookies);
1465 fiov_teardown(&cookediov);
1467 fuse_filehandle_close(vp, fufh, curthread, cred);
1469 if (ap->a_ncookies != NULL) {
1471 *ap->a_ncookies -= ncookies;
1473 free(*ap->a_cookies, M_TEMP);
1474 *ap->a_ncookies = 0;
1475 *ap->a_cookies = NULL;
1478 if (err == 0 && tresid == uio->uio_resid)
1485 struct vnop_readlink_args {
1488 struct ucred *a_cred;
1492 fuse_vnop_readlink(struct vop_readlink_args *ap)
1494 struct vnode *vp = ap->a_vp;
1495 struct uio *uio = ap->a_uio;
1496 struct ucred *cred = ap->a_cred;
1498 struct fuse_dispatcher fdi;
1501 if (fuse_isdeadfs(vp)) {
1504 if (!vnode_islnk(vp)) {
1507 fdisp_init(&fdi, 0);
1508 err = fdisp_simple_putget_vp(&fdi, FUSE_READLINK, vp, curthread, cred);
1512 if (((char *)fdi.answ)[0] == '/' &&
1513 fuse_get_mpdata(vnode_mount(vp))->dataflags & FSESS_PUSH_SYMLINKS_IN) {
1514 char *mpth = vnode_mount(vp)->mnt_stat.f_mntonname;
1516 err = uiomove(mpth, strlen(mpth), uio);
1519 err = uiomove(fdi.answ, fdi.iosize, uio);
1522 fdisp_destroy(&fdi);
1527 struct vnop_reclaim_args {
1532 fuse_vnop_reclaim(struct vop_reclaim_args *ap)
1534 struct vnode *vp = ap->a_vp;
1535 struct thread *td = curthread;
1536 struct fuse_vnode_data *fvdat = VTOFUD(vp);
1537 struct fuse_filehandle *fufh, *fufh_tmp;
1540 panic("FUSE: no vnode data during recycling");
1542 LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) {
1543 printf("FUSE: vnode being reclaimed with open fufh "
1544 "(type=%#x)", fufh->fufh_type);
1545 fuse_filehandle_close(vp, fufh, td, NULL);
1548 if (!fuse_isdeadfs(vp) && fvdat->nlookup > 0) {
1549 fuse_internal_forget_send(vnode_mount(vp), td, NULL, VTOI(vp),
1553 vfs_hash_remove(vp);
1554 fuse_vnode_destroy(vp);
1560 struct vnop_remove_args {
1561 struct vnode *a_dvp;
1563 struct componentname *a_cnp;
1567 fuse_vnop_remove(struct vop_remove_args *ap)
1569 struct vnode *dvp = ap->a_dvp;
1570 struct vnode *vp = ap->a_vp;
1571 struct componentname *cnp = ap->a_cnp;
1575 if (fuse_isdeadfs(vp)) {
1578 if (vnode_isdir(vp)) {
1582 err = fuse_internal_remove(dvp, vp, cnp, FUSE_UNLINK);
1588 struct vnop_rename_args {
1589 struct vnode *a_fdvp;
1590 struct vnode *a_fvp;
1591 struct componentname *a_fcnp;
1592 struct vnode *a_tdvp;
1593 struct vnode *a_tvp;
1594 struct componentname *a_tcnp;
1598 fuse_vnop_rename(struct vop_rename_args *ap)
1600 struct vnode *fdvp = ap->a_fdvp;
1601 struct vnode *fvp = ap->a_fvp;
1602 struct componentname *fcnp = ap->a_fcnp;
1603 struct vnode *tdvp = ap->a_tdvp;
1604 struct vnode *tvp = ap->a_tvp;
1605 struct componentname *tcnp = ap->a_tcnp;
1606 struct fuse_data *data;
1607 bool newparent = fdvp != tdvp;
1608 bool isdir = fvp->v_type == VDIR;
1611 if (fuse_isdeadfs(fdvp)) {
1614 if (fvp->v_mount != tdvp->v_mount ||
1615 (tvp && fvp->v_mount != tvp->v_mount)) {
1616 SDT_PROBE2(fusefs, , vnops, trace, 1, "cross-device rename");
1623 * FUSE library is expected to check if target directory is not
1624 * under the source directory in the file system tree.
1625 * Linux performs this check at VFS level.
1628 * If source is a directory, and it will get a new parent, user must
1629 * have write permission to it, so ".." can be modified.
1631 data = fuse_get_mpdata(vnode_mount(tdvp));
1632 if (data->dataflags & FSESS_DEFAULT_PERMISSIONS && isdir && newparent) {
1633 err = fuse_internal_access(fvp, VWRITE,
1634 tcnp->cn_thread, tcnp->cn_cred);
1638 sx_xlock(&data->rename_lock);
1639 err = fuse_internal_rename(fdvp, fcnp, tdvp, tcnp);
1642 fuse_vnode_setparent(fvp, tdvp);
1644 fuse_vnode_setparent(tvp, NULL);
1646 sx_unlock(&data->rename_lock);
1648 if (tvp != NULL && tvp != fvp) {
1651 if (vnode_isdir(fvp)) {
1652 if ((tvp != NULL) && vnode_isdir(tvp)) {
1673 struct vnop_rmdir_args {
1674 struct vnode *a_dvp;
1676 struct componentname *a_cnp;
1680 fuse_vnop_rmdir(struct vop_rmdir_args *ap)
1682 struct vnode *dvp = ap->a_dvp;
1683 struct vnode *vp = ap->a_vp;
1687 if (fuse_isdeadfs(vp)) {
1690 if (VTOFUD(vp) == VTOFUD(dvp)) {
1693 err = fuse_internal_remove(dvp, vp, ap->a_cnp, FUSE_RMDIR);
1699 struct vnop_setattr_args {
1701 struct vattr *a_vap;
1702 struct ucred *a_cred;
1703 struct thread *a_td;
1707 fuse_vnop_setattr(struct vop_setattr_args *ap)
1709 struct vnode *vp = ap->a_vp;
1710 struct vattr *vap = ap->a_vap;
1711 struct ucred *cred = ap->a_cred;
1712 struct thread *td = curthread;
1714 struct fuse_data *data;
1715 struct vattr old_va;
1718 accmode_t accmode = 0;
1720 bool drop_suid = false;
1723 mp = vnode_mount(vp);
1724 data = fuse_get_mpdata(mp);
1725 dataflags = data->dataflags;
1726 checkperm = dataflags & FSESS_DEFAULT_PERMISSIONS;
1727 if (cred->cr_ngroups > 0)
1728 cr_gid = cred->cr_groups[0];
1732 if (fuse_isdeadfs(vp)) {
1736 if (vap->va_uid != (uid_t)VNOVAL) {
1738 /* Only root may change a file's owner */
1739 err = priv_check_cred(cred, PRIV_VFS_CHOWN);
1741 /* As a special case, allow the null chown */
1742 err2 = fuse_internal_getattr(vp, &old_va, cred,
1746 if (vap->va_uid != old_va.va_uid)
1756 if (vap->va_gid != (gid_t)VNOVAL) {
1757 if (checkperm && priv_check_cred(cred, PRIV_VFS_CHOWN))
1759 if (checkperm && !groupmember(vap->va_gid, cred))
1762 * Non-root users may only chgrp to one of their own
1765 err = priv_check_cred(cred, PRIV_VFS_CHOWN);
1767 /* As a special case, allow the null chgrp */
1768 err2 = fuse_internal_getattr(vp, &old_va, cred,
1772 if (vap->va_gid != old_va.va_gid)
1780 if (vap->va_size != VNOVAL) {
1781 switch (vp->v_type) {
1786 if (vfs_isrdonly(mp))
1791 * According to POSIX, the result is unspecified
1792 * for file types other than regular files,
1793 * directories and shared memory objects. We
1794 * don't support shared memory objects in the file
1795 * system, and have dubious support for truncating
1796 * symlinks. Just ignore the request in other cases.
1800 /* Don't set accmode. Permission to trunc is checked upstack */
1802 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
1803 if (vap->va_vaflags & VA_UTIMES_NULL)
1809 if (vap->va_mode != (mode_t)VNOVAL)
1810 vap->va_mode &= ~(S_ISUID | S_ISGID);
1812 err = fuse_internal_getattr(vp, &old_va, cred, td);
1815 vap->va_mode = old_va.va_mode & ~(S_ISUID | S_ISGID);
1818 if (vap->va_mode != (mode_t)VNOVAL) {
1819 /* Only root may set the sticky bit on non-directories */
1820 if (checkperm && vp->v_type != VDIR && (vap->va_mode & S_ISTXT)
1821 && priv_check_cred(cred, PRIV_VFS_STICKYFILE))
1823 if (checkperm && (vap->va_mode & S_ISGID)) {
1824 err = fuse_internal_getattr(vp, &old_va, cred, td);
1827 if (!groupmember(old_va.va_gid, cred)) {
1828 err = priv_check_cred(cred, PRIV_VFS_SETGID);
1836 if (vfs_isrdonly(mp))
1840 err = fuse_internal_access(vp, accmode, td, cred);
1847 return fuse_internal_setattr(vp, vap, td, cred);
1851 struct vnop_strategy_args {
1857 fuse_vnop_strategy(struct vop_strategy_args *ap)
1859 struct vnode *vp = ap->a_vp;
1860 struct buf *bp = ap->a_bp;
1862 if (!vp || fuse_isdeadfs(vp)) {
1863 bp->b_ioflags |= BIO_ERROR;
1864 bp->b_error = ENXIO;
1870 * VOP_STRATEGY always returns zero and signals error via bp->b_ioflags.
1871 * fuse_io_strategy sets bp's error fields
1873 (void)fuse_io_strategy(vp, bp);
1879 struct vnop_symlink_args {
1880 struct vnode *a_dvp;
1881 struct vnode **a_vpp;
1882 struct componentname *a_cnp;
1883 struct vattr *a_vap;
1888 fuse_vnop_symlink(struct vop_symlink_args *ap)
1890 struct vnode *dvp = ap->a_dvp;
1891 struct vnode **vpp = ap->a_vpp;
1892 struct componentname *cnp = ap->a_cnp;
1893 const char *target = ap->a_target;
1895 struct fuse_dispatcher fdi;
1900 if (fuse_isdeadfs(dvp)) {
1904 * Unlike the other creator type calls, here we have to create a message
1905 * where the name of the new entry comes first, and the data describing
1906 * the entry comes second.
1907 * Hence we can't rely on our handy fuse_internal_newentry() routine,
1908 * but put together the message manually and just call the core part.
1911 len = strlen(target) + 1;
1912 fdisp_init(&fdi, len + cnp->cn_namelen + 1);
1913 fdisp_make_vp(&fdi, FUSE_SYMLINK, dvp, curthread, NULL);
1915 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
1916 ((char *)fdi.indata)[cnp->cn_namelen] = '\0';
1917 memcpy((char *)fdi.indata + cnp->cn_namelen + 1, target, len);
1919 err = fuse_internal_newentry_core(dvp, vpp, cnp, VLNK, &fdi);
1920 fdisp_destroy(&fdi);
1925 struct vnop_write_args {
1929 struct ucred *a_cred;
1933 fuse_vnop_write(struct vop_write_args *ap)
1935 struct vnode *vp = ap->a_vp;
1936 struct uio *uio = ap->a_uio;
1937 int ioflag = ap->a_ioflag;
1938 struct ucred *cred = ap->a_cred;
1939 pid_t pid = curthread->td_proc->p_pid;
1941 if (fuse_isdeadfs(vp)) {
1945 if (VTOFUD(vp)->flag & FN_DIRECTIO) {
1946 ioflag |= IO_DIRECT;
1949 return fuse_io_dispatch(vp, uio, ioflag, cred, pid);
1953 fuse_gbp_getblkno(struct vnode *vp, vm_ooffset_t off)
1955 const int biosize = fuse_iosize(vp);
1957 return (off / biosize);
1961 fuse_gbp_getblksz(struct vnode *vp, daddr_t lbn)
1965 const int biosize = fuse_iosize(vp);
1967 err = fuse_vnode_size(vp, &filesize, NULL, NULL);
1968 KASSERT(err == 0, ("vfs_bio_getpages can't handle errors here"));
1972 if ((off_t)lbn * biosize >= filesize) {
1974 } else if ((off_t)(lbn + 1) * biosize > filesize) {
1975 blksz = filesize - (off_t)lbn *biosize;
1983 struct vnop_getpages_args {
1991 fuse_vnop_getpages(struct vop_getpages_args *ap)
1993 struct vnode *vp = ap->a_vp;
1995 if (!fsess_opt_mmap(vnode_mount(vp))) {
1996 SDT_PROBE2(fusefs, , vnops, trace, 1,
1997 "called on non-cacheable vnode??\n");
1998 return (VM_PAGER_ERROR);
2001 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, ap->a_rbehind,
2002 ap->a_rahead, fuse_gbp_getblkno, fuse_gbp_getblksz));
2005 static const char extattr_namespace_separator = '.';
2008 struct vop_getextattr_args {
2009 struct vop_generic_args a_gen;
2011 int a_attrnamespace;
2015 struct ucred *a_cred;
2016 struct thread *a_td;
2020 fuse_vnop_getextattr(struct vop_getextattr_args *ap)
2022 struct vnode *vp = ap->a_vp;
2023 struct uio *uio = ap->a_uio;
2024 struct fuse_dispatcher fdi;
2025 struct fuse_getxattr_in *get_xattr_in;
2026 struct fuse_getxattr_out *get_xattr_out;
2027 struct mount *mp = vnode_mount(vp);
2028 struct thread *td = ap->a_td;
2029 struct ucred *cred = ap->a_cred;
2035 if (fuse_isdeadfs(vp))
2038 if (!fsess_isimpl(mp, FUSE_GETXATTR))
2041 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD);
2045 /* Default to looking for user attributes. */
2046 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2047 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2049 prefix = EXTATTR_NAMESPACE_USER_STRING;
2051 len = strlen(prefix) + sizeof(extattr_namespace_separator) +
2052 strlen(ap->a_name) + 1;
2054 fdisp_init(&fdi, len + sizeof(*get_xattr_in));
2055 fdisp_make_vp(&fdi, FUSE_GETXATTR, vp, td, cred);
2057 get_xattr_in = fdi.indata;
2059 * Check to see whether we're querying the available size or
2060 * issuing the actual request. If we pass in 0, we get back struct
2061 * fuse_getxattr_out. If we pass in a non-zero size, we get back
2062 * that much data, without the struct fuse_getxattr_out header.
2065 get_xattr_in->size = 0;
2067 get_xattr_in->size = uio->uio_resid;
2069 attr_str = (char *)fdi.indata + sizeof(*get_xattr_in);
2070 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
2073 err = fdisp_wait_answ(&fdi);
2075 if (err == ENOSYS) {
2076 fsess_set_notimpl(mp, FUSE_GETXATTR);
2082 get_xattr_out = fdi.answ;
2084 if (ap->a_size != NULL)
2085 *ap->a_size = get_xattr_out->size;
2088 err = uiomove(fdi.answ, fdi.iosize, uio);
2091 fdisp_destroy(&fdi);
2096 struct vop_setextattr_args {
2097 struct vop_generic_args a_gen;
2099 int a_attrnamespace;
2102 struct ucred *a_cred;
2103 struct thread *a_td;
2107 fuse_vnop_setextattr(struct vop_setextattr_args *ap)
2109 struct vnode *vp = ap->a_vp;
2110 struct uio *uio = ap->a_uio;
2111 struct fuse_dispatcher fdi;
2112 struct fuse_setxattr_in *set_xattr_in;
2113 struct mount *mp = vnode_mount(vp);
2114 struct thread *td = ap->a_td;
2115 struct ucred *cred = ap->a_cred;
2121 if (fuse_isdeadfs(vp))
2124 if (!fsess_isimpl(mp, FUSE_SETXATTR))
2127 if (vfs_isrdonly(mp))
2130 /* Deleting xattrs must use VOP_DELETEEXTATTR instead */
2131 if (ap->a_uio == NULL) {
2133 * If we got here as fallback from VOP_DELETEEXTATTR, then
2134 * return EOPNOTSUPP.
2136 if (!fsess_isimpl(mp, FUSE_REMOVEXATTR))
2137 return (EOPNOTSUPP);
2142 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td,
2147 /* Default to looking for user attributes. */
2148 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2149 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2151 prefix = EXTATTR_NAMESPACE_USER_STRING;
2153 len = strlen(prefix) + sizeof(extattr_namespace_separator) +
2154 strlen(ap->a_name) + 1;
2156 fdisp_init(&fdi, len + sizeof(*set_xattr_in) + uio->uio_resid);
2157 fdisp_make_vp(&fdi, FUSE_SETXATTR, vp, td, cred);
2159 set_xattr_in = fdi.indata;
2160 set_xattr_in->size = uio->uio_resid;
2162 attr_str = (char *)fdi.indata + sizeof(*set_xattr_in);
2163 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
2166 err = uiomove((char *)fdi.indata + sizeof(*set_xattr_in) + len,
2167 uio->uio_resid, uio);
2172 err = fdisp_wait_answ(&fdi);
2174 if (err == ENOSYS) {
2175 fsess_set_notimpl(mp, FUSE_SETXATTR);
2178 if (err == ERESTART) {
2179 /* Can't restart after calling uiomove */
2184 fdisp_destroy(&fdi);
2189 * The Linux / FUSE extended attribute list is simply a collection of
2190 * NUL-terminated strings. The FreeBSD extended attribute list is a single
2191 * byte length followed by a non-NUL terminated string. So, this allows
2192 * conversion of the Linux / FUSE format to the FreeBSD format in place.
2193 * Linux attribute names are reported with the namespace as a prefix (e.g.
2194 * "user.attribute_name"), but in FreeBSD they are reported without the
2195 * namespace prefix (e.g. "attribute_name"). So, we're going from:
2197 * user.attr_name1\0user.attr_name2\0
2201 * <num>attr_name1<num>attr_name2
2203 * Where "<num>" is a single byte number of characters in the attribute name.
2206 * prefix - exattr namespace prefix string
2207 * list, list_len - input list with namespace prefixes
2208 * bsd_list, bsd_list_len - output list compatible with bsd vfs
2211 fuse_xattrlist_convert(char *prefix, const char *list, int list_len,
2212 char *bsd_list, int *bsd_list_len)
2214 int len, pos, dist_to_next, prefix_len;
2218 prefix_len = strlen(prefix);
2220 while (pos < list_len && list[pos] != '\0') {
2221 dist_to_next = strlen(&list[pos]) + 1;
2222 if (bcmp(&list[pos], prefix, prefix_len) == 0 &&
2223 list[pos + prefix_len] == extattr_namespace_separator) {
2224 len = dist_to_next -
2225 (prefix_len + sizeof(extattr_namespace_separator)) - 1;
2226 if (len >= EXTATTR_MAXNAMELEN)
2227 return (ENAMETOOLONG);
2229 bsd_list[*bsd_list_len] = len;
2230 memcpy(&bsd_list[*bsd_list_len + 1],
2231 &list[pos + prefix_len +
2232 sizeof(extattr_namespace_separator)], len);
2234 *bsd_list_len += len + 1;
2237 pos += dist_to_next;
2244 * List extended attributes
2246 * The FUSE_LISTXATTR operation is based on Linux's listxattr(2) syscall, which
2247 * has a number of differences compared to its FreeBSD equivalent,
2248 * extattr_list_file:
2250 * - FUSE_LISTXATTR returns all extended attributes across all namespaces,
2251 * whereas listxattr(2) only returns attributes for a single namespace
2252 * - FUSE_LISTXATTR prepends each attribute name with "namespace."
2253 * - If the provided buffer is not large enough to hold the result,
2254 * FUSE_LISTXATTR should return ERANGE, whereas listxattr is expected to
2255 * return as many results as will fit.
2258 struct vop_listextattr_args {
2259 struct vop_generic_args a_gen;
2261 int a_attrnamespace;
2264 struct ucred *a_cred;
2265 struct thread *a_td;
2269 fuse_vnop_listextattr(struct vop_listextattr_args *ap)
2271 struct vnode *vp = ap->a_vp;
2272 struct uio *uio = ap->a_uio;
2273 struct fuse_dispatcher fdi;
2274 struct fuse_listxattr_in *list_xattr_in;
2275 struct fuse_listxattr_out *list_xattr_out;
2276 struct mount *mp = vnode_mount(vp);
2277 struct thread *td = ap->a_td;
2278 struct ucred *cred = ap->a_cred;
2280 char *bsd_list = NULL;
2286 if (fuse_isdeadfs(vp))
2289 if (!fsess_isimpl(mp, FUSE_LISTXATTR))
2292 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD);
2297 * Add space for a NUL and the period separator if enabled.
2298 * Default to looking for user attributes.
2300 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2301 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2303 prefix = EXTATTR_NAMESPACE_USER_STRING;
2305 fdisp_init(&fdi, sizeof(*list_xattr_in));
2306 fdisp_make_vp(&fdi, FUSE_LISTXATTR, vp, td, cred);
2309 * Retrieve Linux / FUSE compatible list size.
2311 list_xattr_in = fdi.indata;
2312 list_xattr_in->size = 0;
2314 err = fdisp_wait_answ(&fdi);
2316 if (err == ENOSYS) {
2317 fsess_set_notimpl(mp, FUSE_LISTXATTR);
2323 list_xattr_out = fdi.answ;
2324 linux_list_len = list_xattr_out->size;
2325 if (linux_list_len == 0) {
2326 if (ap->a_size != NULL)
2327 *ap->a_size = linux_list_len;
2332 * Retrieve Linux / FUSE compatible list values.
2334 fdisp_refresh_vp(&fdi, FUSE_LISTXATTR, vp, td, cred);
2335 list_xattr_in = fdi.indata;
2336 list_xattr_in->size = linux_list_len;
2338 err = fdisp_wait_answ(&fdi);
2339 if (err == ERANGE) {
2341 * Race detected. The attribute list must've grown since the
2342 * first FUSE_LISTXATTR call. Start over. Go all the way back
2343 * to userland so we can process signals, if necessary, before
2348 } else if (err != 0)
2351 linux_list = fdi.answ;
2352 /* FUSE doesn't allow the server to return more data than requested */
2353 if (fdi.iosize > linux_list_len) {
2354 printf("WARNING: FUSE protocol violation. Server returned "
2355 "more extended attribute data than requested; "
2356 "should've returned ERANGE instead");
2358 /* But returning less data is fine */
2359 linux_list_len = fdi.iosize;
2363 * Retrieve the BSD compatible list values.
2364 * The Linux / FUSE attribute list format isn't the same
2365 * as FreeBSD's format. So we need to transform it into
2366 * FreeBSD's format before giving it to the user.
2368 bsd_list = malloc(linux_list_len, M_TEMP, M_WAITOK);
2369 err = fuse_xattrlist_convert(prefix, linux_list, linux_list_len,
2370 bsd_list, &bsd_list_len);
2374 if (ap->a_size != NULL)
2375 *ap->a_size = bsd_list_len;
2378 err = uiomove(bsd_list, bsd_list_len, uio);
2381 free(bsd_list, M_TEMP);
2382 fdisp_destroy(&fdi);
2387 struct vop_deleteextattr_args {
2388 struct vop_generic_args a_gen;
2390 int a_attrnamespace;
2392 struct ucred *a_cred;
2393 struct thread *a_td;
2397 fuse_vnop_deleteextattr(struct vop_deleteextattr_args *ap)
2399 struct vnode *vp = ap->a_vp;
2400 struct fuse_dispatcher fdi;
2401 struct mount *mp = vnode_mount(vp);
2402 struct thread *td = ap->a_td;
2403 struct ucred *cred = ap->a_cred;
2409 if (fuse_isdeadfs(vp))
2412 if (!fsess_isimpl(mp, FUSE_REMOVEXATTR))
2415 if (vfs_isrdonly(mp))
2418 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td,
2423 /* Default to looking for user attributes. */
2424 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2425 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2427 prefix = EXTATTR_NAMESPACE_USER_STRING;
2429 len = strlen(prefix) + sizeof(extattr_namespace_separator) +
2430 strlen(ap->a_name) + 1;
2432 fdisp_init(&fdi, len);
2433 fdisp_make_vp(&fdi, FUSE_REMOVEXATTR, vp, td, cred);
2435 attr_str = fdi.indata;
2436 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
2439 err = fdisp_wait_answ(&fdi);
2440 if (err == ENOSYS) {
2441 fsess_set_notimpl(mp, FUSE_REMOVEXATTR);
2445 fdisp_destroy(&fdi);
2450 struct vnop_print_args {
2455 fuse_vnop_print(struct vop_print_args *ap)
2457 struct fuse_vnode_data *fvdat = VTOFUD(ap->a_vp);
2459 printf("nodeid: %ju, parent nodeid: %ju, nlookup: %ju, flag: %#x\n",
2460 (uintmax_t)VTOILLU(ap->a_vp), (uintmax_t)fvdat->parent_nid,
2461 (uintmax_t)fvdat->nlookup,
2468 * Get an NFS filehandle for a FUSE file.
2470 * This will only work for FUSE file systems that guarantee the uniqueness of
2471 * nodeid:generation, which most don't.
2475 IN struct vnode *a_vp;
2476 IN struct fid *a_fhp;
2480 fuse_vnop_vptofh(struct vop_vptofh_args *ap)
2482 struct vnode *vp = ap->a_vp;
2483 struct fuse_vnode_data *fvdat = VTOFUD(vp);
2484 struct fuse_fid *fhp = (struct fuse_fid *)(ap->a_fhp);
2485 _Static_assert(sizeof(struct fuse_fid) <= sizeof(struct fid),
2486 "FUSE fid type is too big");
2487 struct mount *mp = vnode_mount(vp);
2488 struct fuse_data *data = fuse_get_mpdata(mp);
2492 if (!(data->dataflags & FSESS_EXPORT_SUPPORT))
2495 err = fuse_internal_getattr(vp, &va, curthread->td_ucred, curthread);
2499 /*ip = VTOI(ap->a_vp);*/
2500 /*ufhp = (struct ufid *)ap->a_fhp;*/
2501 fhp->len = sizeof(struct fuse_fid);
2502 fhp->nid = fvdat->nid;
2503 if (fvdat->generation <= UINT32_MAX)
2504 fhp->gen = fvdat->generation;