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,
178 struct vop_vector fuse_vnops = {
179 .vop_allocate = VOP_EINVAL,
180 .vop_default = &default_vnodeops,
181 .vop_access = fuse_vnop_access,
182 .vop_advlock = fuse_vnop_advlock,
183 .vop_bmap = fuse_vnop_bmap,
184 .vop_close = fuse_vnop_close,
185 .vop_create = fuse_vnop_create,
186 .vop_deleteextattr = fuse_vnop_deleteextattr,
187 .vop_fsync = fuse_vnop_fsync,
188 .vop_fdatasync = fuse_vnop_fdatasync,
189 .vop_getattr = fuse_vnop_getattr,
190 .vop_getextattr = fuse_vnop_getextattr,
191 .vop_inactive = fuse_vnop_inactive,
193 * TODO: implement vop_ioctl after upgrading to protocol 7.16.
194 * FUSE_IOCTL was added in 7.11, but 32-bit compat is broken until
197 .vop_link = fuse_vnop_link,
198 .vop_listextattr = fuse_vnop_listextattr,
199 .vop_lookup = fuse_vnop_lookup,
200 .vop_mkdir = fuse_vnop_mkdir,
201 .vop_mknod = fuse_vnop_mknod,
202 .vop_open = fuse_vnop_open,
203 .vop_pathconf = fuse_vnop_pathconf,
205 * TODO: implement vop_poll after upgrading to protocol 7.21.
206 * FUSE_POLL was added in protocol 7.11, but it's kind of broken until
207 * 7.21, which adds the ability for the client to choose which poll
208 * events it wants, and for a client to deregister a file handle
210 .vop_read = fuse_vnop_read,
211 .vop_readdir = fuse_vnop_readdir,
212 .vop_readlink = fuse_vnop_readlink,
213 .vop_reclaim = fuse_vnop_reclaim,
214 .vop_remove = fuse_vnop_remove,
215 .vop_rename = fuse_vnop_rename,
216 .vop_rmdir = fuse_vnop_rmdir,
217 .vop_setattr = fuse_vnop_setattr,
218 .vop_setextattr = fuse_vnop_setextattr,
219 .vop_strategy = fuse_vnop_strategy,
220 .vop_symlink = fuse_vnop_symlink,
221 .vop_write = fuse_vnop_write,
222 .vop_getpages = fuse_vnop_getpages,
223 .vop_print = fuse_vnop_print,
224 .vop_vptofh = fuse_vnop_vptofh,
227 uma_zone_t fuse_pbuf_zone;
229 #define fuse_vm_page_lock(m) vm_page_lock((m));
230 #define fuse_vm_page_unlock(m) vm_page_unlock((m));
231 #define fuse_vm_page_lock_queues() ((void)0)
232 #define fuse_vm_page_unlock_queues() ((void)0)
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);
243 * Kernel-invoked always succeeds.
249 * Do not allow privileged processes in jail to directly manipulate
253 case EXTATTR_NAMESPACE_SYSTEM:
254 if (data->dataflags & FSESS_DEFAULT_PERMISSIONS) {
255 return (priv_check_cred(cred, PRIV_VFS_EXTATTR_SYSTEM));
258 case EXTATTR_NAMESPACE_USER:
259 return (fuse_internal_access(vp, accmode, td, cred));
265 /* Get a filehandle for a directory */
267 fuse_filehandle_get_dir(struct vnode *vp, struct fuse_filehandle **fufhp,
268 struct ucred *cred, pid_t pid)
270 if (fuse_filehandle_get(vp, FREAD, fufhp, cred, pid) == 0)
272 return fuse_filehandle_get(vp, FEXEC, fufhp, cred, pid);
275 /* Send FUSE_FLUSH for this vnode */
277 fuse_flush(struct vnode *vp, struct ucred *cred, pid_t pid, int fflag)
279 struct fuse_flush_in *ffi;
280 struct fuse_filehandle *fufh;
281 struct fuse_dispatcher fdi;
282 struct thread *td = curthread;
283 struct mount *mp = vnode_mount(vp);
286 if (!fsess_isimpl(vnode_mount(vp), FUSE_FLUSH))
289 err = fuse_filehandle_getrw(vp, fflag, &fufh, cred, pid);
293 fdisp_init(&fdi, sizeof(*ffi));
294 fdisp_make_vp(&fdi, FUSE_FLUSH, vp, td, cred);
296 ffi->fh = fufh->fh_id;
298 * If the file has a POSIX lock then we're supposed to set lock_owner.
299 * If not, then lock_owner is undefined. So we may as well always set
302 ffi->lock_owner = td->td_proc->p_pid;
304 err = fdisp_wait_answ(&fdi);
306 fsess_set_notimpl(mp, FUSE_FLUSH);
313 /* Close wrapper for fifos. */
315 fuse_fifo_close(struct vop_close_args *ap)
317 return (fifo_specops.vop_close(ap));
321 struct vnop_access_args {
323 #if VOP_ACCESS_TAKES_ACCMODE_T
328 struct ucred *a_cred;
333 fuse_vnop_access(struct vop_access_args *ap)
335 struct vnode *vp = ap->a_vp;
336 int accmode = ap->a_accmode;
337 struct ucred *cred = ap->a_cred;
339 struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
343 if (fuse_isdeadfs(vp)) {
344 if (vnode_isvroot(vp)) {
349 if (!(data->dataflags & FSESS_INITED)) {
350 if (vnode_isvroot(vp)) {
351 if (priv_check_cred(cred, PRIV_VFS_ADMIN) ||
352 (fuse_match_cred(data->daemoncred, cred) == 0)) {
358 if (vnode_islnk(vp)) {
362 err = fuse_internal_access(vp, accmode, ap->a_td, ap->a_cred);
367 * struct vop_advlock_args {
368 * struct vop_generic_args a_gen;
369 * struct vnode *a_vp;
372 * struct flock *a_fl;
377 fuse_vnop_advlock(struct vop_advlock_args *ap)
379 struct vnode *vp = ap->a_vp;
380 struct flock *fl = ap->a_fl;
381 struct thread *td = curthread;
382 struct ucred *cred = td->td_ucred;
383 pid_t pid = td->td_proc->p_pid;
384 struct fuse_filehandle *fufh;
385 struct fuse_dispatcher fdi;
386 struct fuse_lk_in *fli;
387 struct fuse_lk_out *flo;
390 int flags = ap->a_flags;
392 dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;
394 if (fuse_isdeadfs(vp)) {
398 if (!(dataflags & FSESS_POSIX_LOCKS))
399 return vop_stdadvlock(ap);
400 /* FUSE doesn't properly support flock until protocol 7.17 */
402 return vop_stdadvlock(ap);
404 err = fuse_filehandle_get_anyflags(vp, &fufh, cred, pid);
408 fdisp_init(&fdi, sizeof(*fli));
424 fdisp_make_vp(&fdi, op, vp, td, cred);
426 fli->fh = fufh->fh_id;
427 fli->owner = fl->l_pid;
428 fli->lk.start = fl->l_start;
430 fli->lk.end = fl->l_start + fl->l_len - 1;
432 fli->lk.end = INT64_MAX;
433 fli->lk.type = fl->l_type;
434 fli->lk.pid = fl->l_pid;
436 err = fdisp_wait_answ(&fdi);
439 if (err == 0 && op == FUSE_GETLK) {
441 fl->l_type = flo->lk.type;
442 fl->l_pid = flo->lk.pid;
443 if (flo->lk.type != F_UNLCK) {
444 fl->l_start = flo->lk.start;
445 if (flo->lk.end == INT64_MAX)
448 fl->l_len = flo->lk.end - flo->lk.start + 1;
449 fl->l_start = flo->lk.start;
459 struct bufobj **a_bop;
465 fuse_vnop_bmap(struct vop_bmap_args *ap)
467 struct vnode *vp = ap->a_vp;
468 struct bufobj **bo = ap->a_bop;
469 struct thread *td = curthread;
471 struct fuse_dispatcher fdi;
472 struct fuse_bmap_in *fbi;
473 struct fuse_bmap_out *fbo;
474 struct fuse_data *data;
477 daddr_t lbn = ap->a_bn;
478 daddr_t *pbn = ap->a_bnp;
479 int *runp = ap->a_runp;
480 int *runb = ap->a_runb;
484 if (fuse_isdeadfs(vp)) {
488 mp = vnode_mount(vp);
489 data = fuse_get_mpdata(mp);
490 biosize = fuse_iosize(vp);
491 maxrun = MIN(vp->v_mount->mnt_iosize_max / biosize - 1,
492 data->max_readahead_blocks);
498 * The FUSE_BMAP operation does not include the runp and runb
499 * variables, so we must guess. Report nonzero contiguous runs so
500 * cluster_read will combine adjacent reads. It's worthwhile to reduce
501 * upcalls even if we don't know the true physical layout of the file.
503 * FUSE file systems may opt out of read clustering in two ways:
504 * * mounting with -onoclusterr
505 * * Setting max_readahead <= maxbcachebuf during FUSE_INIT
508 *runb = MIN(lbn, maxrun);
510 error = fuse_vnode_size(vp, &filesize, td->td_ucred, td);
512 *runp = MIN(MAX(0, filesize / biosize - lbn - 1),
518 if (fsess_isimpl(mp, FUSE_BMAP)) {
519 fdisp_init(&fdi, sizeof(*fbi));
520 fdisp_make_vp(&fdi, FUSE_BMAP, vp, td, td->td_ucred);
523 fbi->blocksize = biosize;
524 error = fdisp_wait_answ(&fdi);
525 if (error == ENOSYS) {
527 fsess_set_notimpl(mp, FUSE_BMAP);
531 if (error == 0 && pbn != NULL)
538 /* If the daemon doesn't support BMAP, make up a sensible default */
540 *pbn = lbn * btodb(biosize);
545 struct vop_close_args {
548 struct ucred *a_cred;
553 fuse_vnop_close(struct vop_close_args *ap)
555 struct vnode *vp = ap->a_vp;
556 struct ucred *cred = ap->a_cred;
557 int fflag = ap->a_fflag;
558 struct thread *td = ap->a_td;
559 pid_t pid = td->td_proc->p_pid;
562 if (fuse_isdeadfs(vp))
566 if (fflag & IO_NDELAY)
569 err = fuse_flush(vp, cred, pid, fflag);
570 /* TODO: close the file handle, if we're sure it's no longer used */
571 if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {
572 fuse_vnode_savesize(vp, cred, td->td_proc->p_pid);
578 fdisp_make_mknod_for_fallback(
579 struct fuse_dispatcher *fdip,
580 struct componentname *cnp,
586 enum fuse_opcode *op)
588 struct fuse_mknod_in *fmni;
590 fdisp_init(fdip, sizeof(*fmni) + cnp->cn_namelen + 1);
592 fdisp_make(fdip, *op, vnode_mount(dvp), parentnid, td, cred);
596 memcpy((char *)fdip->indata + sizeof(*fmni), cnp->cn_nameptr,
598 ((char *)fdip->indata)[sizeof(*fmni) + cnp->cn_namelen] = '\0';
601 struct vnop_create_args {
603 struct vnode **a_vpp;
604 struct componentname *a_cnp;
609 fuse_vnop_create(struct vop_create_args *ap)
611 struct vnode *dvp = ap->a_dvp;
612 struct vnode **vpp = ap->a_vpp;
613 struct componentname *cnp = ap->a_cnp;
614 struct vattr *vap = ap->a_vap;
615 struct thread *td = cnp->cn_thread;
616 struct ucred *cred = cnp->cn_cred;
618 struct fuse_data *data;
619 struct fuse_create_in *fci;
620 struct fuse_entry_out *feo;
621 struct fuse_open_out *foo;
622 struct fuse_dispatcher fdi, fdi2;
623 struct fuse_dispatcher *fdip = &fdi;
624 struct fuse_dispatcher *fdip2 = NULL;
628 struct mount *mp = vnode_mount(dvp);
629 data = fuse_get_mpdata(mp);
630 uint64_t parentnid = VTOFUD(dvp)->nid;
631 mode_t mode = MAKEIMODE(vap->va_type, vap->va_mode);
635 if (fuse_isdeadfs(dvp))
638 /* FUSE expects sockets to be created with FUSE_MKNOD */
639 if (vap->va_type == VSOCK)
640 return fuse_internal_mknod(dvp, vpp, cnp, vap);
643 * VOP_CREATE doesn't tell us the open(2) flags, so we guess. Only a
644 * writable mode makes sense, and we might as well include readability
649 bzero(&fdi, sizeof(fdi));
651 if (vap->va_type != VREG)
654 if (!fsess_isimpl(mp, FUSE_CREATE) || vap->va_type == VSOCK) {
655 /* Fallback to FUSE_MKNOD/FUSE_OPEN */
656 fdisp_make_mknod_for_fallback(fdip, cnp, dvp, parentnid, td,
659 /* Use FUSE_CREATE */
663 fdisp_init(fdip, sizeof(*fci) + cnp->cn_namelen + 1);
664 fdisp_make(fdip, op, vnode_mount(dvp), parentnid, td, cred);
667 fci->flags = O_CREAT | flags;
668 if (fuse_libabi_geq(data, 7, 12)) {
669 insize = sizeof(*fci);
670 fci->umask = td->td_proc->p_fd->fd_cmask;
672 insize = sizeof(struct fuse_open_in);
675 memcpy((char *)fdip->indata + insize, cnp->cn_nameptr,
677 ((char *)fdip->indata)[insize + cnp->cn_namelen] = '\0';
680 err = fdisp_wait_answ(fdip);
683 if (err == ENOSYS && op == FUSE_CREATE) {
684 fsess_set_notimpl(mp, FUSE_CREATE);
686 fdisp_make_mknod_for_fallback(fdip, cnp, dvp,
687 parentnid, td, cred, mode, &op);
688 err = fdisp_wait_answ(fdip);
696 if ((err = fuse_internal_checkentry(feo, vap->va_type))) {
700 if (op == FUSE_CREATE) {
701 foo = (struct fuse_open_out*)(feo + 1);
703 /* Issue a separate FUSE_OPEN */
704 struct fuse_open_in *foi;
707 fdisp_init(fdip2, sizeof(*foi));
708 fdisp_make(fdip2, FUSE_OPEN, vnode_mount(dvp), feo->nodeid, td,
712 err = fdisp_wait_answ(fdip2);
717 err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, vap->va_type);
719 struct fuse_release_in *fri;
720 uint64_t nodeid = feo->nodeid;
721 uint64_t fh_id = foo->fh;
723 fdisp_init(fdip, sizeof(*fri));
724 fdisp_make(fdip, FUSE_RELEASE, mp, nodeid, td, cred);
728 fuse_insert_callback(fdip->tick, fuse_internal_forget_callback);
729 fuse_insert_message(fdip->tick, false);
732 ASSERT_VOP_ELOCKED(*vpp, "fuse_vnop_create");
733 fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid,
734 feo->attr_valid_nsec, NULL);
736 fuse_filehandle_init(*vpp, FUFH_RDWR, NULL, td, cred, foo);
737 fuse_vnode_open(*vpp, foo->open_flags, td);
739 * Purge the parent's attribute cache because the daemon should've
740 * updated its mtime and ctime
742 fuse_vnode_clear_attr_cache(dvp);
743 cache_purge_negative(dvp);
747 fdisp_destroy(fdip2);
753 struct vnop_fdatasync_args {
754 struct vop_generic_args a_gen;
756 struct thread * a_td;
760 fuse_vnop_fdatasync(struct vop_fdatasync_args *ap)
762 struct vnode *vp = ap->a_vp;
763 struct thread *td = ap->a_td;
764 int waitfor = MNT_WAIT;
768 if (fuse_isdeadfs(vp)) {
771 if ((err = vop_stdfdatasync_buf(ap)))
774 return fuse_internal_fsync(vp, td, waitfor, true);
778 struct vnop_fsync_args {
779 struct vop_generic_args a_gen;
782 struct thread * a_td;
786 fuse_vnop_fsync(struct vop_fsync_args *ap)
788 struct vnode *vp = ap->a_vp;
789 struct thread *td = ap->a_td;
790 int waitfor = ap->a_waitfor;
793 if (fuse_isdeadfs(vp)) {
796 if ((err = vop_stdfsync(ap)))
799 return fuse_internal_fsync(vp, td, waitfor, false);
803 struct vnop_getattr_args {
806 struct ucred *a_cred;
811 fuse_vnop_getattr(struct vop_getattr_args *ap)
813 struct vnode *vp = ap->a_vp;
814 struct vattr *vap = ap->a_vap;
815 struct ucred *cred = ap->a_cred;
816 struct thread *td = curthread;
821 dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;
823 /* Note that we are not bailing out on a dead file system just yet. */
825 if (!(dataflags & FSESS_INITED)) {
826 if (!vnode_isvroot(vp)) {
827 fdata_set_dead(fuse_get_mpdata(vnode_mount(vp)));
834 err = fuse_internal_getattr(vp, vap, cred, td);
835 if (err == ENOTCONN && vnode_isvroot(vp)) {
836 /* see comment in fuse_vfsop_statfs() */
843 bzero(vap, sizeof(*vap));
844 vap->va_type = vnode_vtype(vp);
850 struct vnop_inactive_args {
856 fuse_vnop_inactive(struct vop_inactive_args *ap)
858 struct vnode *vp = ap->a_vp;
859 struct thread *td = ap->a_td;
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*");
968 struct vnop_lookup_args {
969 struct vnodeop_desc *a_desc;
971 struct vnode **a_vpp;
972 struct componentname *a_cnp;
976 fuse_vnop_lookup(struct vop_lookup_args *ap)
978 struct vnode *dvp = ap->a_dvp;
979 struct vnode **vpp = ap->a_vpp;
980 struct componentname *cnp = ap->a_cnp;
981 struct thread *td = cnp->cn_thread;
982 struct ucred *cred = cnp->cn_cred;
984 int nameiop = cnp->cn_nameiop;
985 int flags = cnp->cn_flags;
986 int wantparent = flags & (LOCKPARENT | WANTPARENT);
987 int islastcn = flags & ISLASTCN;
988 struct mount *mp = vnode_mount(dvp);
992 struct vnode *vp = NULL;
994 struct fuse_dispatcher fdi;
995 bool did_lookup = false;
996 struct fuse_entry_out *feo = NULL;
997 enum vtype vtyp; /* vnode type of target */
998 off_t filesize; /* filesize of target */
1002 if (fuse_isdeadfs(dvp)) {
1006 if (!vnode_isdir(dvp))
1009 if (islastcn && vfs_isrdonly(mp) && (nameiop != LOOKUP))
1012 if ((err = fuse_internal_access(dvp, VEXEC, td, cred)))
1015 if (flags & ISDOTDOT) {
1016 KASSERT(VTOFUD(dvp)->flag & FN_PARENT_NID,
1017 ("Looking up .. is TODO"));
1018 nid = VTOFUD(dvp)->parent_nid;
1021 /* .. is obviously a directory */
1024 } else if (cnp->cn_namelen == 1 && *(cnp->cn_nameptr) == '.') {
1026 /* . is obviously a directory */
1030 struct timespec now, timeout;
1032 err = cache_lookup(dvp, vpp, cnp, &timeout, NULL);
1033 getnanouptime(&now);
1034 SDT_PROBE3(fusefs, , vnops, cache_lookup, err, &timeout, &now);
1036 case -1: /* positive match */
1037 if (timespeccmp(&timeout, &now, >)) {
1038 counter_u64_add(fuse_lookup_cache_hits, 1);
1041 counter_u64_add(fuse_lookup_cache_misses, 1);
1043 &VTOFUD(*vpp)->entry_cache_timeout);
1054 case 0: /* no match in cache */
1055 counter_u64_add(fuse_lookup_cache_misses, 1);
1058 case ENOENT: /* negative match */
1059 getnanouptime(&now);
1060 if (timespeccmp(&timeout, &now, <=)) {
1062 cache_purge_negative(dvp);
1071 fdisp_init(&fdi, cnp->cn_namelen + 1);
1072 fdisp_make(&fdi, FUSE_LOOKUP, mp, nid, td, cred);
1074 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
1075 ((char *)fdi.indata)[cnp->cn_namelen] = '\0';
1076 lookup_err = fdisp_wait_answ(&fdi);
1080 /* lookup call succeeded */
1081 feo = (struct fuse_entry_out *)fdi.answ;
1084 /* zero nodeid means ENOENT and cache it */
1085 struct timespec timeout;
1087 fdi.answ_stat = ENOENT;
1088 lookup_err = ENOENT;
1089 if (cnp->cn_flags & MAKEENTRY) {
1090 fuse_validity_2_timespec(feo, &timeout);
1091 cache_enter_time(dvp, *vpp, cnp,
1094 } else if (nid == FUSE_ROOT_ID) {
1095 lookup_err = EINVAL;
1097 vtyp = IFTOVT(feo->attr.mode);
1098 filesize = feo->attr.size;
1100 if (lookup_err && (!fdi.answ_stat || lookup_err != ENOENT)) {
1101 fdisp_destroy(&fdi);
1105 /* lookup_err, if non-zero, must be ENOENT at this point */
1108 /* Entry not found */
1109 if ((nameiop == CREATE || nameiop == RENAME) && islastcn) {
1110 err = fuse_internal_access(dvp, VWRITE, td, cred);
1113 * Set the SAVENAME flag to hold onto the
1114 * pathname for use later in VOP_CREATE or
1117 cnp->cn_flags |= SAVENAME;
1125 /* Entry was found */
1126 if (flags & ISDOTDOT) {
1127 struct fuse_lookup_alloc_arg flaa;
1133 err = vn_vget_ino_gen(dvp, fuse_lookup_alloc, &flaa, 0,
1136 } else if (nid == VTOI(dvp)) {
1140 struct fuse_vnode_data *fvdat;
1142 err = fuse_vnode_get(vnode_mount(dvp), feo, nid, dvp,
1149 * In the case where we are looking up a FUSE node
1150 * represented by an existing cached vnode, and the
1151 * true size reported by FUSE_LOOKUP doesn't match
1152 * the vnode's cached size, then any cached writes
1153 * beyond the file's current size are lost.
1156 * * following attribute cache expiration, or
1157 * * due a bug in the daemon, or
1160 if (vnode_isreg(vp) &&
1161 filesize != fvdat->cached_attrs.va_size &&
1162 fvdat->flag & FN_SIZECHANGE) {
1164 * The FN_SIZECHANGE flag reflects a dirty
1165 * append. If userspace lets us know our cache
1166 * is invalid, that write was lost. (Dirty
1167 * writes that do not cause append are also
1168 * lost, but we don't detect them here.)
1170 * XXX: Maybe disable WB caching on this mount.
1172 printf("%s: WB cache incoherent on %s!\n",
1174 vnode_mount(vp)->mnt_stat.f_mntonname);
1176 fvdat->flag &= ~FN_SIZECHANGE;
1180 fuse_internal_cache_attrs(*vpp, &feo->attr,
1181 feo->attr_valid, feo->attr_valid_nsec, NULL);
1182 fuse_validity_2_bintime(feo->entry_valid,
1183 feo->entry_valid_nsec,
1184 &fvdat->entry_cache_timeout);
1186 if ((nameiop == DELETE || nameiop == RENAME) &&
1189 struct vattr dvattr;
1191 err = fuse_internal_access(dvp, VWRITE, td,
1196 * if the parent's sticky bit is set, check
1197 * whether we're allowed to remove the file.
1198 * Need to figure out the vnode locking to make
1201 fuse_internal_getattr(dvp, &dvattr, cred, td);
1202 if ((dvattr.va_mode & S_ISTXT) &&
1203 fuse_internal_access(dvp, VADMIN, td,
1205 fuse_internal_access(*vpp, VADMIN, td,
1213 (nameiop == DELETE) ||
1214 (nameiop == RENAME && wantparent))) {
1215 cnp->cn_flags |= SAVENAME;
1222 if (vp != NULL && dvp != vp)
1224 else if (vp != NULL)
1229 fdisp_destroy(&fdi);
1235 struct vnop_mkdir_args {
1236 struct vnode *a_dvp;
1237 struct vnode **a_vpp;
1238 struct componentname *a_cnp;
1239 struct vattr *a_vap;
1243 fuse_vnop_mkdir(struct vop_mkdir_args *ap)
1245 struct vnode *dvp = ap->a_dvp;
1246 struct vnode **vpp = ap->a_vpp;
1247 struct componentname *cnp = ap->a_cnp;
1248 struct vattr *vap = ap->a_vap;
1250 struct fuse_mkdir_in fmdi;
1252 if (fuse_isdeadfs(dvp)) {
1255 fmdi.mode = MAKEIMODE(vap->va_type, vap->va_mode);
1256 fmdi.umask = curthread->td_proc->p_fd->fd_cmask;
1258 return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKDIR, &fmdi,
1259 sizeof(fmdi), VDIR));
1263 struct vnop_mknod_args {
1264 struct vnode *a_dvp;
1265 struct vnode **a_vpp;
1266 struct componentname *a_cnp;
1267 struct vattr *a_vap;
1271 fuse_vnop_mknod(struct vop_mknod_args *ap)
1274 struct vnode *dvp = ap->a_dvp;
1275 struct vnode **vpp = ap->a_vpp;
1276 struct componentname *cnp = ap->a_cnp;
1277 struct vattr *vap = ap->a_vap;
1279 if (fuse_isdeadfs(dvp))
1282 return fuse_internal_mknod(dvp, vpp, cnp, vap);
1286 struct vop_open_args {
1289 struct ucred *a_cred;
1290 struct thread *a_td;
1291 int a_fdidx; / struct file *a_fp;
1295 fuse_vnop_open(struct vop_open_args *ap)
1297 struct vnode *vp = ap->a_vp;
1298 int a_mode = ap->a_mode;
1299 struct thread *td = ap->a_td;
1300 struct ucred *cred = ap->a_cred;
1301 pid_t pid = td->td_proc->p_pid;
1302 struct fuse_vnode_data *fvdat;
1304 if (fuse_isdeadfs(vp))
1306 if (vp->v_type == VCHR || vp->v_type == VBLK || vp->v_type == VFIFO)
1307 return (EOPNOTSUPP);
1308 if ((a_mode & (FREAD | FWRITE | FEXEC)) == 0)
1313 if (fuse_filehandle_validrw(vp, a_mode, cred, pid)) {
1314 fuse_vnode_open(vp, 0, td);
1318 return fuse_filehandle_open(vp, a_mode, NULL, td, cred);
1322 fuse_vnop_pathconf(struct vop_pathconf_args *ap)
1325 switch (ap->a_name) {
1326 case _PC_FILESIZEBITS:
1330 *ap->a_retval = NAME_MAX;
1333 *ap->a_retval = MIN(LONG_MAX, FUSE_LINK_MAX);
1335 case _PC_SYMLINK_MAX:
1336 *ap->a_retval = MAXPATHLEN;
1342 return (vop_stdpathconf(ap));
1347 struct vnop_read_args {
1351 struct ucred *a_cred;
1355 fuse_vnop_read(struct vop_read_args *ap)
1357 struct vnode *vp = ap->a_vp;
1358 struct uio *uio = ap->a_uio;
1359 int ioflag = ap->a_ioflag;
1360 struct ucred *cred = ap->a_cred;
1361 pid_t pid = curthread->td_proc->p_pid;
1363 if (fuse_isdeadfs(vp)) {
1367 if (VTOFUD(vp)->flag & FN_DIRECTIO) {
1368 ioflag |= IO_DIRECT;
1371 return fuse_io_dispatch(vp, uio, ioflag, cred, pid);
1375 struct vnop_readdir_args {
1378 struct ucred *a_cred;
1385 fuse_vnop_readdir(struct vop_readdir_args *ap)
1387 struct vnode *vp = ap->a_vp;
1388 struct uio *uio = ap->a_uio;
1389 struct ucred *cred = ap->a_cred;
1390 struct fuse_filehandle *fufh = NULL;
1391 struct fuse_iov cookediov;
1397 bool closefufh = false;
1398 pid_t pid = curthread->td_proc->p_pid;
1402 if (fuse_isdeadfs(vp)) {
1405 if ( /* XXXIP ((uio_iovcnt(uio) > 1)) || */
1406 (uio_resid(uio) < sizeof(struct dirent))) {
1410 tresid = uio->uio_resid;
1411 startoff = uio->uio_offset;
1412 err = fuse_filehandle_get_dir(vp, &fufh, cred, pid);
1413 if (err == EBADF && vnode_mount(vp)->mnt_flag & MNT_EXPORTED) {
1415 * nfsd will do VOP_READDIR without first doing VOP_OPEN. We
1416 * must implicitly open the directory here
1418 err = fuse_filehandle_open(vp, FREAD, &fufh, curthread, cred);
1421 * When a directory is opened, it must be read from
1422 * the beginning. Hopefully, the "startoff" still
1423 * exists as an offset cookie for the directory.
1424 * If not, it will read the entire directory without
1425 * returning any entries and just return eof.
1427 uio->uio_offset = 0;
1433 if (ap->a_ncookies != NULL) {
1434 ncookies = uio->uio_resid /
1435 (offsetof(struct dirent, d_name) + 4) + 1;
1436 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK);
1437 *ap->a_ncookies = ncookies;
1438 *ap->a_cookies = cookies;
1443 #define DIRCOOKEDSIZE FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + MAXNAMLEN + 1)
1444 fiov_init(&cookediov, DIRCOOKEDSIZE);
1446 err = fuse_internal_readdir(vp, uio, startoff, fufh, &cookediov,
1447 &ncookies, cookies);
1449 fiov_teardown(&cookediov);
1451 fuse_filehandle_close(vp, fufh, curthread, cred);
1453 if (ap->a_ncookies != NULL) {
1455 *ap->a_ncookies -= ncookies;
1457 free(*ap->a_cookies, M_TEMP);
1458 *ap->a_ncookies = 0;
1459 *ap->a_cookies = NULL;
1462 if (err == 0 && tresid == uio->uio_resid)
1469 struct vnop_readlink_args {
1472 struct ucred *a_cred;
1476 fuse_vnop_readlink(struct vop_readlink_args *ap)
1478 struct vnode *vp = ap->a_vp;
1479 struct uio *uio = ap->a_uio;
1480 struct ucred *cred = ap->a_cred;
1482 struct fuse_dispatcher fdi;
1485 if (fuse_isdeadfs(vp)) {
1488 if (!vnode_islnk(vp)) {
1491 fdisp_init(&fdi, 0);
1492 err = fdisp_simple_putget_vp(&fdi, FUSE_READLINK, vp, curthread, cred);
1496 if (((char *)fdi.answ)[0] == '/' &&
1497 fuse_get_mpdata(vnode_mount(vp))->dataflags & FSESS_PUSH_SYMLINKS_IN) {
1498 char *mpth = vnode_mount(vp)->mnt_stat.f_mntonname;
1500 err = uiomove(mpth, strlen(mpth), uio);
1503 err = uiomove(fdi.answ, fdi.iosize, uio);
1506 fdisp_destroy(&fdi);
1511 struct vnop_reclaim_args {
1513 struct thread *a_td;
1517 fuse_vnop_reclaim(struct vop_reclaim_args *ap)
1519 struct vnode *vp = ap->a_vp;
1520 struct thread *td = ap->a_td;
1521 struct fuse_vnode_data *fvdat = VTOFUD(vp);
1522 struct fuse_filehandle *fufh, *fufh_tmp;
1525 panic("FUSE: no vnode data during recycling");
1527 LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) {
1528 printf("FUSE: vnode being reclaimed with open fufh "
1529 "(type=%#x)", fufh->fufh_type);
1530 fuse_filehandle_close(vp, fufh, td, NULL);
1533 if ((!fuse_isdeadfs(vp)) && (fvdat->nlookup)) {
1534 fuse_internal_forget_send(vnode_mount(vp), td, NULL, VTOI(vp),
1537 fuse_vnode_setparent(vp, NULL);
1539 vfs_hash_remove(vp);
1540 vnode_destroy_vobject(vp);
1541 fuse_vnode_destroy(vp);
1547 struct vnop_remove_args {
1548 struct vnode *a_dvp;
1550 struct componentname *a_cnp;
1554 fuse_vnop_remove(struct vop_remove_args *ap)
1556 struct vnode *dvp = ap->a_dvp;
1557 struct vnode *vp = ap->a_vp;
1558 struct componentname *cnp = ap->a_cnp;
1562 if (fuse_isdeadfs(vp)) {
1565 if (vnode_isdir(vp)) {
1569 err = fuse_internal_remove(dvp, vp, cnp, FUSE_UNLINK);
1575 struct vnop_rename_args {
1576 struct vnode *a_fdvp;
1577 struct vnode *a_fvp;
1578 struct componentname *a_fcnp;
1579 struct vnode *a_tdvp;
1580 struct vnode *a_tvp;
1581 struct componentname *a_tcnp;
1585 fuse_vnop_rename(struct vop_rename_args *ap)
1587 struct vnode *fdvp = ap->a_fdvp;
1588 struct vnode *fvp = ap->a_fvp;
1589 struct componentname *fcnp = ap->a_fcnp;
1590 struct vnode *tdvp = ap->a_tdvp;
1591 struct vnode *tvp = ap->a_tvp;
1592 struct componentname *tcnp = ap->a_tcnp;
1593 struct fuse_data *data;
1594 bool newparent = fdvp != tdvp;
1595 bool isdir = fvp->v_type == VDIR;
1598 if (fuse_isdeadfs(fdvp)) {
1601 if (fvp->v_mount != tdvp->v_mount ||
1602 (tvp && fvp->v_mount != tvp->v_mount)) {
1603 SDT_PROBE2(fusefs, , vnops, trace, 1, "cross-device rename");
1610 * FUSE library is expected to check if target directory is not
1611 * under the source directory in the file system tree.
1612 * Linux performs this check at VFS level.
1615 * If source is a directory, and it will get a new parent, user must
1616 * have write permission to it, so ".." can be modified.
1618 data = fuse_get_mpdata(vnode_mount(tdvp));
1619 if (data->dataflags & FSESS_DEFAULT_PERMISSIONS && isdir && newparent) {
1620 err = fuse_internal_access(fvp, VWRITE,
1621 tcnp->cn_thread, tcnp->cn_cred);
1625 sx_xlock(&data->rename_lock);
1626 err = fuse_internal_rename(fdvp, fcnp, tdvp, tcnp);
1629 fuse_vnode_setparent(fvp, tdvp);
1631 fuse_vnode_setparent(tvp, NULL);
1633 sx_unlock(&data->rename_lock);
1635 if (tvp != NULL && tvp != fvp) {
1638 if (vnode_isdir(fvp)) {
1639 if ((tvp != NULL) && vnode_isdir(tvp)) {
1660 struct vnop_rmdir_args {
1661 struct vnode *a_dvp;
1663 struct componentname *a_cnp;
1667 fuse_vnop_rmdir(struct vop_rmdir_args *ap)
1669 struct vnode *dvp = ap->a_dvp;
1670 struct vnode *vp = ap->a_vp;
1674 if (fuse_isdeadfs(vp)) {
1677 if (VTOFUD(vp) == VTOFUD(dvp)) {
1680 err = fuse_internal_remove(dvp, vp, ap->a_cnp, FUSE_RMDIR);
1686 struct vnop_setattr_args {
1688 struct vattr *a_vap;
1689 struct ucred *a_cred;
1690 struct thread *a_td;
1694 fuse_vnop_setattr(struct vop_setattr_args *ap)
1696 struct vnode *vp = ap->a_vp;
1697 struct vattr *vap = ap->a_vap;
1698 struct ucred *cred = ap->a_cred;
1699 struct thread *td = curthread;
1701 struct fuse_data *data;
1702 struct vattr old_va;
1705 accmode_t accmode = 0;
1707 bool drop_suid = false;
1710 mp = vnode_mount(vp);
1711 data = fuse_get_mpdata(mp);
1712 dataflags = data->dataflags;
1713 checkperm = dataflags & FSESS_DEFAULT_PERMISSIONS;
1714 if (cred->cr_ngroups > 0)
1715 cr_gid = cred->cr_groups[0];
1719 if (fuse_isdeadfs(vp)) {
1723 if (vap->va_uid != (uid_t)VNOVAL) {
1725 /* Only root may change a file's owner */
1726 err = priv_check_cred(cred, PRIV_VFS_CHOWN);
1728 /* As a special case, allow the null chown */
1729 err2 = fuse_internal_getattr(vp, &old_va, cred,
1733 if (vap->va_uid != old_va.va_uid)
1743 if (vap->va_gid != (gid_t)VNOVAL) {
1744 if (checkperm && priv_check_cred(cred, PRIV_VFS_CHOWN))
1746 if (checkperm && !groupmember(vap->va_gid, cred))
1749 * Non-root users may only chgrp to one of their own
1752 err = priv_check_cred(cred, PRIV_VFS_CHOWN);
1754 /* As a special case, allow the null chgrp */
1755 err2 = fuse_internal_getattr(vp, &old_va, cred,
1759 if (vap->va_gid != old_va.va_gid)
1767 if (vap->va_size != VNOVAL) {
1768 switch (vp->v_type) {
1773 if (vfs_isrdonly(mp))
1778 * According to POSIX, the result is unspecified
1779 * for file types other than regular files,
1780 * directories and shared memory objects. We
1781 * don't support shared memory objects in the file
1782 * system, and have dubious support for truncating
1783 * symlinks. Just ignore the request in other cases.
1787 /* Don't set accmode. Permission to trunc is checked upstack */
1789 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
1790 if (vap->va_vaflags & VA_UTIMES_NULL)
1796 if (vap->va_mode != (mode_t)VNOVAL)
1797 vap->va_mode &= ~(S_ISUID | S_ISGID);
1799 err = fuse_internal_getattr(vp, &old_va, cred, td);
1802 vap->va_mode = old_va.va_mode & ~(S_ISUID | S_ISGID);
1805 if (vap->va_mode != (mode_t)VNOVAL) {
1806 /* Only root may set the sticky bit on non-directories */
1807 if (checkperm && vp->v_type != VDIR && (vap->va_mode & S_ISTXT)
1808 && priv_check_cred(cred, PRIV_VFS_STICKYFILE))
1810 if (checkperm && (vap->va_mode & S_ISGID)) {
1811 err = fuse_internal_getattr(vp, &old_va, cred, td);
1814 if (!groupmember(old_va.va_gid, cred)) {
1815 err = priv_check_cred(cred, PRIV_VFS_SETGID);
1823 if (vfs_isrdonly(mp))
1826 err = fuse_internal_access(vp, accmode, td, cred);
1830 return fuse_internal_setattr(vp, vap, td, cred);
1834 struct vnop_strategy_args {
1840 fuse_vnop_strategy(struct vop_strategy_args *ap)
1842 struct vnode *vp = ap->a_vp;
1843 struct buf *bp = ap->a_bp;
1845 if (!vp || fuse_isdeadfs(vp)) {
1846 bp->b_ioflags |= BIO_ERROR;
1847 bp->b_error = ENXIO;
1853 * VOP_STRATEGY always returns zero and signals error via bp->b_ioflags.
1854 * fuse_io_strategy sets bp's error fields
1856 (void)fuse_io_strategy(vp, bp);
1863 struct vnop_symlink_args {
1864 struct vnode *a_dvp;
1865 struct vnode **a_vpp;
1866 struct componentname *a_cnp;
1867 struct vattr *a_vap;
1872 fuse_vnop_symlink(struct vop_symlink_args *ap)
1874 struct vnode *dvp = ap->a_dvp;
1875 struct vnode **vpp = ap->a_vpp;
1876 struct componentname *cnp = ap->a_cnp;
1877 const char *target = ap->a_target;
1879 struct fuse_dispatcher fdi;
1884 if (fuse_isdeadfs(dvp)) {
1888 * Unlike the other creator type calls, here we have to create a message
1889 * where the name of the new entry comes first, and the data describing
1890 * the entry comes second.
1891 * Hence we can't rely on our handy fuse_internal_newentry() routine,
1892 * but put together the message manually and just call the core part.
1895 len = strlen(target) + 1;
1896 fdisp_init(&fdi, len + cnp->cn_namelen + 1);
1897 fdisp_make_vp(&fdi, FUSE_SYMLINK, dvp, curthread, NULL);
1899 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
1900 ((char *)fdi.indata)[cnp->cn_namelen] = '\0';
1901 memcpy((char *)fdi.indata + cnp->cn_namelen + 1, target, len);
1903 err = fuse_internal_newentry_core(dvp, vpp, cnp, VLNK, &fdi);
1904 fdisp_destroy(&fdi);
1909 struct vnop_write_args {
1913 struct ucred *a_cred;
1917 fuse_vnop_write(struct vop_write_args *ap)
1919 struct vnode *vp = ap->a_vp;
1920 struct uio *uio = ap->a_uio;
1921 int ioflag = ap->a_ioflag;
1922 struct ucred *cred = ap->a_cred;
1923 pid_t pid = curthread->td_proc->p_pid;
1925 if (fuse_isdeadfs(vp)) {
1929 if (VTOFUD(vp)->flag & FN_DIRECTIO) {
1930 ioflag |= IO_DIRECT;
1933 return fuse_io_dispatch(vp, uio, ioflag, cred, pid);
1937 fuse_gbp_getblkno(struct vnode *vp, vm_ooffset_t off)
1939 const int biosize = fuse_iosize(vp);
1941 return (off / biosize);
1945 fuse_gbp_getblksz(struct vnode *vp, daddr_t lbn)
1949 const int biosize = fuse_iosize(vp);
1951 err = fuse_vnode_size(vp, &filesize, NULL, NULL);
1952 KASSERT(err == 0, ("vfs_bio_getpages can't handle errors here"));
1956 if ((off_t)lbn * biosize >= filesize) {
1958 } else if ((off_t)(lbn + 1) * biosize > filesize) {
1959 blksz = filesize - (off_t)lbn *biosize;
1967 struct vnop_getpages_args {
1975 fuse_vnop_getpages(struct vop_getpages_args *ap)
1977 struct vnode *vp = ap->a_vp;
1979 if (!fsess_opt_mmap(vnode_mount(vp))) {
1980 SDT_PROBE2(fusefs, , vnops, trace, 1,
1981 "called on non-cacheable vnode??\n");
1982 return (VM_PAGER_ERROR);
1985 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, ap->a_rbehind,
1986 ap->a_rahead, fuse_gbp_getblkno, fuse_gbp_getblksz));
1989 static const char extattr_namespace_separator = '.';
1992 struct vop_getextattr_args {
1993 struct vop_generic_args a_gen;
1995 int a_attrnamespace;
1999 struct ucred *a_cred;
2000 struct thread *a_td;
2004 fuse_vnop_getextattr(struct vop_getextattr_args *ap)
2006 struct vnode *vp = ap->a_vp;
2007 struct uio *uio = ap->a_uio;
2008 struct fuse_dispatcher fdi;
2009 struct fuse_getxattr_in *get_xattr_in;
2010 struct fuse_getxattr_out *get_xattr_out;
2011 struct mount *mp = vnode_mount(vp);
2012 struct thread *td = ap->a_td;
2013 struct ucred *cred = ap->a_cred;
2019 if (fuse_isdeadfs(vp))
2022 if (!fsess_isimpl(mp, FUSE_GETXATTR))
2025 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD);
2029 /* Default to looking for user attributes. */
2030 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2031 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2033 prefix = EXTATTR_NAMESPACE_USER_STRING;
2035 len = strlen(prefix) + sizeof(extattr_namespace_separator) +
2036 strlen(ap->a_name) + 1;
2038 fdisp_init(&fdi, len + sizeof(*get_xattr_in));
2039 fdisp_make_vp(&fdi, FUSE_GETXATTR, vp, td, cred);
2041 get_xattr_in = fdi.indata;
2043 * Check to see whether we're querying the available size or
2044 * issuing the actual request. If we pass in 0, we get back struct
2045 * fuse_getxattr_out. If we pass in a non-zero size, we get back
2046 * that much data, without the struct fuse_getxattr_out header.
2049 get_xattr_in->size = 0;
2051 get_xattr_in->size = uio->uio_resid;
2053 attr_str = (char *)fdi.indata + sizeof(*get_xattr_in);
2054 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
2057 err = fdisp_wait_answ(&fdi);
2059 if (err == ENOSYS) {
2060 fsess_set_notimpl(mp, FUSE_GETXATTR);
2066 get_xattr_out = fdi.answ;
2068 if (ap->a_size != NULL)
2069 *ap->a_size = get_xattr_out->size;
2072 err = uiomove(fdi.answ, fdi.iosize, uio);
2075 fdisp_destroy(&fdi);
2080 struct vop_setextattr_args {
2081 struct vop_generic_args a_gen;
2083 int a_attrnamespace;
2086 struct ucred *a_cred;
2087 struct thread *a_td;
2091 fuse_vnop_setextattr(struct vop_setextattr_args *ap)
2093 struct vnode *vp = ap->a_vp;
2094 struct uio *uio = ap->a_uio;
2095 struct fuse_dispatcher fdi;
2096 struct fuse_setxattr_in *set_xattr_in;
2097 struct mount *mp = vnode_mount(vp);
2098 struct thread *td = ap->a_td;
2099 struct ucred *cred = ap->a_cred;
2105 if (fuse_isdeadfs(vp))
2108 if (!fsess_isimpl(mp, FUSE_SETXATTR))
2111 if (vfs_isrdonly(mp))
2114 /* Deleting xattrs must use VOP_DELETEEXTATTR instead */
2115 if (ap->a_uio == NULL) {
2117 * If we got here as fallback from VOP_DELETEEXTATTR, then
2118 * return EOPNOTSUPP.
2120 if (!fsess_isimpl(mp, FUSE_REMOVEXATTR))
2121 return (EOPNOTSUPP);
2126 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td,
2131 /* Default to looking for user attributes. */
2132 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2133 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2135 prefix = EXTATTR_NAMESPACE_USER_STRING;
2137 len = strlen(prefix) + sizeof(extattr_namespace_separator) +
2138 strlen(ap->a_name) + 1;
2140 fdisp_init(&fdi, len + sizeof(*set_xattr_in) + uio->uio_resid);
2141 fdisp_make_vp(&fdi, FUSE_SETXATTR, vp, td, cred);
2143 set_xattr_in = fdi.indata;
2144 set_xattr_in->size = uio->uio_resid;
2146 attr_str = (char *)fdi.indata + sizeof(*set_xattr_in);
2147 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
2150 err = uiomove((char *)fdi.indata + sizeof(*set_xattr_in) + len,
2151 uio->uio_resid, uio);
2156 err = fdisp_wait_answ(&fdi);
2158 if (err == ENOSYS) {
2159 fsess_set_notimpl(mp, FUSE_SETXATTR);
2162 if (err == ERESTART) {
2163 /* Can't restart after calling uiomove */
2168 fdisp_destroy(&fdi);
2173 * The Linux / FUSE extended attribute list is simply a collection of
2174 * NUL-terminated strings. The FreeBSD extended attribute list is a single
2175 * byte length followed by a non-NUL terminated string. So, this allows
2176 * conversion of the Linux / FUSE format to the FreeBSD format in place.
2177 * Linux attribute names are reported with the namespace as a prefix (e.g.
2178 * "user.attribute_name"), but in FreeBSD they are reported without the
2179 * namespace prefix (e.g. "attribute_name"). So, we're going from:
2181 * user.attr_name1\0user.attr_name2\0
2185 * <num>attr_name1<num>attr_name2
2187 * Where "<num>" is a single byte number of characters in the attribute name.
2190 * prefix - exattr namespace prefix string
2191 * list, list_len - input list with namespace prefixes
2192 * bsd_list, bsd_list_len - output list compatible with bsd vfs
2195 fuse_xattrlist_convert(char *prefix, const char *list, int list_len,
2196 char *bsd_list, int *bsd_list_len)
2198 int len, pos, dist_to_next, prefix_len;
2202 prefix_len = strlen(prefix);
2204 while (pos < list_len && list[pos] != '\0') {
2205 dist_to_next = strlen(&list[pos]) + 1;
2206 if (bcmp(&list[pos], prefix, prefix_len) == 0 &&
2207 list[pos + prefix_len] == extattr_namespace_separator) {
2208 len = dist_to_next -
2209 (prefix_len + sizeof(extattr_namespace_separator)) - 1;
2210 if (len >= EXTATTR_MAXNAMELEN)
2211 return (ENAMETOOLONG);
2213 bsd_list[*bsd_list_len] = len;
2214 memcpy(&bsd_list[*bsd_list_len + 1],
2215 &list[pos + prefix_len +
2216 sizeof(extattr_namespace_separator)], len);
2218 *bsd_list_len += len + 1;
2221 pos += dist_to_next;
2228 struct vop_listextattr_args {
2229 struct vop_generic_args a_gen;
2231 int a_attrnamespace;
2234 struct ucred *a_cred;
2235 struct thread *a_td;
2239 fuse_vnop_listextattr(struct vop_listextattr_args *ap)
2241 struct vnode *vp = ap->a_vp;
2242 struct uio *uio = ap->a_uio;
2243 struct fuse_dispatcher fdi;
2244 struct fuse_listxattr_in *list_xattr_in;
2245 struct fuse_listxattr_out *list_xattr_out;
2246 struct mount *mp = vnode_mount(vp);
2247 struct thread *td = ap->a_td;
2248 struct ucred *cred = ap->a_cred;
2252 char *bsd_list = NULL;
2258 if (fuse_isdeadfs(vp))
2261 if (!fsess_isimpl(mp, FUSE_LISTXATTR))
2264 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD);
2269 * Add space for a NUL and the period separator if enabled.
2270 * Default to looking for user attributes.
2272 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2273 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2275 prefix = EXTATTR_NAMESPACE_USER_STRING;
2277 len = strlen(prefix) + sizeof(extattr_namespace_separator) + 1;
2279 fdisp_init(&fdi, sizeof(*list_xattr_in) + len);
2280 fdisp_make_vp(&fdi, FUSE_LISTXATTR, vp, td, cred);
2283 * Retrieve Linux / FUSE compatible list size.
2285 list_xattr_in = fdi.indata;
2286 list_xattr_in->size = 0;
2287 attr_str = (char *)fdi.indata + sizeof(*list_xattr_in);
2288 snprintf(attr_str, len, "%s%c", prefix, extattr_namespace_separator);
2290 err = fdisp_wait_answ(&fdi);
2292 if (err == ENOSYS) {
2293 fsess_set_notimpl(mp, FUSE_LISTXATTR);
2299 list_xattr_out = fdi.answ;
2300 linux_list_len = list_xattr_out->size;
2301 if (linux_list_len == 0) {
2302 if (ap->a_size != NULL)
2303 *ap->a_size = linux_list_len;
2308 * Retrieve Linux / FUSE compatible list values.
2310 fdisp_refresh_vp(&fdi, FUSE_LISTXATTR, vp, td, cred);
2311 list_xattr_in = fdi.indata;
2312 list_xattr_in->size = linux_list_len + sizeof(*list_xattr_out);
2313 attr_str = (char *)fdi.indata + sizeof(*list_xattr_in);
2314 snprintf(attr_str, len, "%s%c", prefix, extattr_namespace_separator);
2316 err = fdisp_wait_answ(&fdi);
2320 linux_list = fdi.answ;
2321 linux_list_len = fdi.iosize;
2324 * Retrieve the BSD compatible list values.
2325 * The Linux / FUSE attribute list format isn't the same
2326 * as FreeBSD's format. So we need to transform it into
2327 * FreeBSD's format before giving it to the user.
2329 bsd_list = malloc(linux_list_len, M_TEMP, M_WAITOK);
2330 err = fuse_xattrlist_convert(prefix, linux_list, linux_list_len,
2331 bsd_list, &bsd_list_len);
2335 if (ap->a_size != NULL)
2336 *ap->a_size = bsd_list_len;
2339 err = uiomove(bsd_list, bsd_list_len, uio);
2342 free(bsd_list, M_TEMP);
2343 fdisp_destroy(&fdi);
2348 struct vop_deleteextattr_args {
2349 struct vop_generic_args a_gen;
2351 int a_attrnamespace;
2353 struct ucred *a_cred;
2354 struct thread *a_td;
2358 fuse_vnop_deleteextattr(struct vop_deleteextattr_args *ap)
2360 struct vnode *vp = ap->a_vp;
2361 struct fuse_dispatcher fdi;
2362 struct mount *mp = vnode_mount(vp);
2363 struct thread *td = ap->a_td;
2364 struct ucred *cred = ap->a_cred;
2370 if (fuse_isdeadfs(vp))
2373 if (!fsess_isimpl(mp, FUSE_REMOVEXATTR))
2376 if (vfs_isrdonly(mp))
2379 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td,
2384 /* Default to looking for user attributes. */
2385 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2386 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2388 prefix = EXTATTR_NAMESPACE_USER_STRING;
2390 len = strlen(prefix) + sizeof(extattr_namespace_separator) +
2391 strlen(ap->a_name) + 1;
2393 fdisp_init(&fdi, len);
2394 fdisp_make_vp(&fdi, FUSE_REMOVEXATTR, vp, td, cred);
2396 attr_str = fdi.indata;
2397 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
2400 err = fdisp_wait_answ(&fdi);
2401 if (err == ENOSYS) {
2402 fsess_set_notimpl(mp, FUSE_REMOVEXATTR);
2406 fdisp_destroy(&fdi);
2411 struct vnop_print_args {
2416 fuse_vnop_print(struct vop_print_args *ap)
2418 struct fuse_vnode_data *fvdat = VTOFUD(ap->a_vp);
2420 printf("nodeid: %ju, parent nodeid: %ju, nlookup: %ju, flag: %#x\n",
2421 (uintmax_t)VTOILLU(ap->a_vp), (uintmax_t)fvdat->parent_nid,
2422 (uintmax_t)fvdat->nlookup,
2429 * Get an NFS filehandle for a FUSE file.
2431 * This will only work for FUSE file systems that guarantee the uniqueness of
2432 * nodeid:generation, which most don't.
2436 IN struct vnode *a_vp;
2437 IN struct fid *a_fhp;
2441 fuse_vnop_vptofh(struct vop_vptofh_args *ap)
2443 struct vnode *vp = ap->a_vp;
2444 struct fuse_vnode_data *fvdat = VTOFUD(vp);
2445 struct fuse_fid *fhp = (struct fuse_fid *)(ap->a_fhp);
2446 _Static_assert(sizeof(struct fuse_fid) <= sizeof(struct fid),
2447 "FUSE fid type is too big");
2448 struct mount *mp = vnode_mount(vp);
2449 struct fuse_data *data = fuse_get_mpdata(mp);
2453 if (!(data->dataflags & FSESS_EXPORT_SUPPORT))
2456 err = fuse_internal_getattr(vp, &va, curthread->td_ucred, curthread);
2460 /*ip = VTOI(ap->a_vp);*/
2461 /*ufhp = (struct ufid *)ap->a_fhp;*/
2462 fhp->len = sizeof(struct fuse_fid);
2463 fhp->nid = fvdat->nid;
2464 if (fvdat->generation <= UINT32_MAX)
2465 fhp->gen = fvdat->generation;