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 int fuse_pbuf_freecnt = -1;
229 /* Check permission for extattr operations, much like extattr_check_cred */
231 fuse_extattr_check_cred(struct vnode *vp, int ns, struct ucred *cred,
232 struct thread *td, accmode_t accmode)
234 struct mount *mp = vnode_mount(vp);
235 struct fuse_data *data = fuse_get_mpdata(mp);
238 * Kernel-invoked always succeeds.
244 * Do not allow privileged processes in jail to directly manipulate
248 case EXTATTR_NAMESPACE_SYSTEM:
249 if (data->dataflags & FSESS_DEFAULT_PERMISSIONS) {
250 return (priv_check_cred(cred, PRIV_VFS_EXTATTR_SYSTEM,
254 case EXTATTR_NAMESPACE_USER:
255 return (fuse_internal_access(vp, accmode, td, cred));
261 /* Get a filehandle for a directory */
263 fuse_filehandle_get_dir(struct vnode *vp, struct fuse_filehandle **fufhp,
264 struct ucred *cred, pid_t pid)
266 if (fuse_filehandle_get(vp, FREAD, fufhp, cred, pid) == 0)
268 return fuse_filehandle_get(vp, FEXEC, fufhp, cred, pid);
271 /* Send FUSE_FLUSH for this vnode */
273 fuse_flush(struct vnode *vp, struct ucred *cred, pid_t pid, int fflag)
275 struct fuse_flush_in *ffi;
276 struct fuse_filehandle *fufh;
277 struct fuse_dispatcher fdi;
278 struct thread *td = curthread;
279 struct mount *mp = vnode_mount(vp);
282 if (!fsess_isimpl(vnode_mount(vp), FUSE_FLUSH))
285 err = fuse_filehandle_getrw(vp, fflag, &fufh, cred, pid);
289 fdisp_init(&fdi, sizeof(*ffi));
290 fdisp_make_vp(&fdi, FUSE_FLUSH, vp, td, cred);
292 ffi->fh = fufh->fh_id;
294 * If the file has a POSIX lock then we're supposed to set lock_owner.
295 * If not, then lock_owner is undefined. So we may as well always set
298 ffi->lock_owner = td->td_proc->p_pid;
300 err = fdisp_wait_answ(&fdi);
302 fsess_set_notimpl(mp, FUSE_FLUSH);
309 /* Close wrapper for fifos. */
311 fuse_fifo_close(struct vop_close_args *ap)
313 return (fifo_specops.vop_close(ap));
317 struct vnop_access_args {
319 #if VOP_ACCESS_TAKES_ACCMODE_T
324 struct ucred *a_cred;
329 fuse_vnop_access(struct vop_access_args *ap)
331 struct vnode *vp = ap->a_vp;
332 int accmode = ap->a_accmode;
333 struct ucred *cred = ap->a_cred;
335 struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
339 if (fuse_isdeadfs(vp)) {
340 if (vnode_isvroot(vp)) {
345 if (!(data->dataflags & FSESS_INITED)) {
346 if (vnode_isvroot(vp)) {
347 if (priv_check_cred(cred, PRIV_VFS_ADMIN, 0) ||
348 (fuse_match_cred(data->daemoncred, cred) == 0)) {
354 if (vnode_islnk(vp)) {
358 err = fuse_internal_access(vp, accmode, ap->a_td, ap->a_cred);
363 * struct vop_advlock_args {
364 * struct vop_generic_args a_gen;
365 * struct vnode *a_vp;
368 * struct flock *a_fl;
373 fuse_vnop_advlock(struct vop_advlock_args *ap)
375 struct vnode *vp = ap->a_vp;
376 struct flock *fl = ap->a_fl;
377 struct thread *td = curthread;
378 struct ucred *cred = td->td_ucred;
379 pid_t pid = td->td_proc->p_pid;
380 struct fuse_filehandle *fufh;
381 struct fuse_dispatcher fdi;
382 struct fuse_lk_in *fli;
383 struct fuse_lk_out *flo;
386 int flags = ap->a_flags;
388 dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;
390 if (fuse_isdeadfs(vp)) {
394 if (!(dataflags & FSESS_POSIX_LOCKS))
395 return vop_stdadvlock(ap);
396 /* FUSE doesn't properly support flock until protocol 7.17 */
398 return vop_stdadvlock(ap);
400 err = fuse_filehandle_get_anyflags(vp, &fufh, cred, pid);
404 fdisp_init(&fdi, sizeof(*fli));
420 fdisp_make_vp(&fdi, op, vp, td, cred);
422 fli->fh = fufh->fh_id;
423 fli->owner = fl->l_pid;
424 fli->lk.start = fl->l_start;
426 fli->lk.end = fl->l_start + fl->l_len - 1;
428 fli->lk.end = INT64_MAX;
429 fli->lk.type = fl->l_type;
430 fli->lk.pid = fl->l_pid;
432 err = fdisp_wait_answ(&fdi);
435 if (err == 0 && op == FUSE_GETLK) {
437 fl->l_type = flo->lk.type;
438 fl->l_pid = flo->lk.pid;
439 if (flo->lk.type != F_UNLCK) {
440 fl->l_start = flo->lk.start;
441 if (flo->lk.end == INT64_MAX)
444 fl->l_len = flo->lk.end - flo->lk.start + 1;
445 fl->l_start = flo->lk.start;
455 struct bufobj **a_bop;
461 fuse_vnop_bmap(struct vop_bmap_args *ap)
463 struct vnode *vp = ap->a_vp;
464 struct bufobj **bo = ap->a_bop;
465 struct thread *td = curthread;
467 struct fuse_dispatcher fdi;
468 struct fuse_bmap_in *fbi;
469 struct fuse_bmap_out *fbo;
470 struct fuse_data *data;
473 daddr_t lbn = ap->a_bn;
474 daddr_t *pbn = ap->a_bnp;
475 int *runp = ap->a_runp;
476 int *runb = ap->a_runb;
480 if (fuse_isdeadfs(vp)) {
484 mp = vnode_mount(vp);
485 data = fuse_get_mpdata(mp);
486 biosize = fuse_iosize(vp);
487 maxrun = MIN(vp->v_mount->mnt_iosize_max / biosize - 1,
488 data->max_readahead_blocks);
494 * The FUSE_BMAP operation does not include the runp and runb
495 * variables, so we must guess. Report nonzero contiguous runs so
496 * cluster_read will combine adjacent reads. It's worthwhile to reduce
497 * upcalls even if we don't know the true physical layout of the file.
499 * FUSE file systems may opt out of read clustering in two ways:
500 * * mounting with -onoclusterr
501 * * Setting max_readahead <= maxbcachebuf during FUSE_INIT
504 *runb = MIN(lbn, maxrun);
506 error = fuse_vnode_size(vp, &filesize, td->td_ucred, td);
508 *runp = MIN(MAX(0, filesize / (off_t)biosize - lbn - 1),
514 if (fsess_isimpl(mp, FUSE_BMAP)) {
515 fdisp_init(&fdi, sizeof(*fbi));
516 fdisp_make_vp(&fdi, FUSE_BMAP, vp, td, td->td_ucred);
519 fbi->blocksize = biosize;
520 error = fdisp_wait_answ(&fdi);
521 if (error == ENOSYS) {
523 fsess_set_notimpl(mp, FUSE_BMAP);
527 if (error == 0 && pbn != NULL)
534 /* If the daemon doesn't support BMAP, make up a sensible default */
536 *pbn = lbn * btodb(biosize);
541 struct vop_close_args {
544 struct ucred *a_cred;
549 fuse_vnop_close(struct vop_close_args *ap)
551 struct vnode *vp = ap->a_vp;
552 struct ucred *cred = ap->a_cred;
553 int fflag = ap->a_fflag;
554 struct thread *td = ap->a_td;
555 pid_t pid = td->td_proc->p_pid;
558 if (fuse_isdeadfs(vp))
562 if (fflag & IO_NDELAY)
565 err = fuse_flush(vp, cred, pid, fflag);
566 /* TODO: close the file handle, if we're sure it's no longer used */
567 if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {
568 fuse_vnode_savesize(vp, cred, td->td_proc->p_pid);
574 fdisp_make_mknod_for_fallback(
575 struct fuse_dispatcher *fdip,
576 struct componentname *cnp,
582 enum fuse_opcode *op)
584 struct fuse_mknod_in *fmni;
586 fdisp_init(fdip, sizeof(*fmni) + cnp->cn_namelen + 1);
588 fdisp_make(fdip, *op, vnode_mount(dvp), parentnid, td, cred);
592 memcpy((char *)fdip->indata + sizeof(*fmni), cnp->cn_nameptr,
594 ((char *)fdip->indata)[sizeof(*fmni) + cnp->cn_namelen] = '\0';
597 struct vnop_create_args {
599 struct vnode **a_vpp;
600 struct componentname *a_cnp;
605 fuse_vnop_create(struct vop_create_args *ap)
607 struct vnode *dvp = ap->a_dvp;
608 struct vnode **vpp = ap->a_vpp;
609 struct componentname *cnp = ap->a_cnp;
610 struct vattr *vap = ap->a_vap;
611 struct thread *td = cnp->cn_thread;
612 struct ucred *cred = cnp->cn_cred;
614 struct fuse_data *data;
615 struct fuse_create_in *fci;
616 struct fuse_entry_out *feo;
617 struct fuse_open_out *foo;
618 struct fuse_dispatcher fdi, fdi2;
619 struct fuse_dispatcher *fdip = &fdi;
620 struct fuse_dispatcher *fdip2 = NULL;
624 struct mount *mp = vnode_mount(dvp);
625 data = fuse_get_mpdata(mp);
626 uint64_t parentnid = VTOFUD(dvp)->nid;
627 mode_t mode = MAKEIMODE(vap->va_type, vap->va_mode);
631 if (fuse_isdeadfs(dvp))
634 /* FUSE expects sockets to be created with FUSE_MKNOD */
635 if (vap->va_type == VSOCK)
636 return fuse_internal_mknod(dvp, vpp, cnp, vap);
639 * VOP_CREATE doesn't tell us the open(2) flags, so we guess. Only a
640 * writable mode makes sense, and we might as well include readability
645 bzero(&fdi, sizeof(fdi));
647 if (vap->va_type != VREG)
650 if (!fsess_isimpl(mp, FUSE_CREATE) || vap->va_type == VSOCK) {
651 /* Fallback to FUSE_MKNOD/FUSE_OPEN */
652 fdisp_make_mknod_for_fallback(fdip, cnp, dvp, parentnid, td,
655 /* Use FUSE_CREATE */
659 fdisp_init(fdip, sizeof(*fci) + cnp->cn_namelen + 1);
660 fdisp_make(fdip, op, vnode_mount(dvp), parentnid, td, cred);
663 fci->flags = O_CREAT | flags;
664 if (fuse_libabi_geq(data, 7, 12)) {
665 insize = sizeof(*fci);
666 fci->umask = td->td_proc->p_fd->fd_cmask;
668 insize = sizeof(struct fuse_open_in);
671 memcpy((char *)fdip->indata + insize, cnp->cn_nameptr,
673 ((char *)fdip->indata)[insize + cnp->cn_namelen] = '\0';
676 err = fdisp_wait_answ(fdip);
679 if (err == ENOSYS && op == FUSE_CREATE) {
680 fsess_set_notimpl(mp, FUSE_CREATE);
682 fdisp_make_mknod_for_fallback(fdip, cnp, dvp,
683 parentnid, td, cred, mode, &op);
684 err = fdisp_wait_answ(fdip);
692 if ((err = fuse_internal_checkentry(feo, vap->va_type))) {
696 if (op == FUSE_CREATE) {
697 foo = (struct fuse_open_out*)(feo + 1);
699 /* Issue a separate FUSE_OPEN */
700 struct fuse_open_in *foi;
703 fdisp_init(fdip2, sizeof(*foi));
704 fdisp_make(fdip2, FUSE_OPEN, vnode_mount(dvp), feo->nodeid, td,
708 err = fdisp_wait_answ(fdip2);
713 err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, vap->va_type);
715 struct fuse_release_in *fri;
716 uint64_t nodeid = feo->nodeid;
717 uint64_t fh_id = foo->fh;
719 fdisp_init(fdip, sizeof(*fri));
720 fdisp_make(fdip, FUSE_RELEASE, mp, nodeid, td, cred);
724 fuse_insert_callback(fdip->tick, fuse_internal_forget_callback);
725 fuse_insert_message(fdip->tick, false);
728 ASSERT_VOP_ELOCKED(*vpp, "fuse_vnop_create");
729 fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid,
730 feo->attr_valid_nsec, NULL);
732 fuse_filehandle_init(*vpp, FUFH_RDWR, NULL, td, cred, foo);
733 fuse_vnode_open(*vpp, foo->open_flags, td);
735 * Purge the parent's attribute cache because the daemon should've
736 * updated its mtime and ctime
738 fuse_vnode_clear_attr_cache(dvp);
739 cache_purge_negative(dvp);
743 fdisp_destroy(fdip2);
749 struct vnop_fdatasync_args {
750 struct vop_generic_args a_gen;
752 struct thread * a_td;
756 fuse_vnop_fdatasync(struct vop_fdatasync_args *ap)
758 struct vnode *vp = ap->a_vp;
759 struct thread *td = ap->a_td;
760 int waitfor = MNT_WAIT;
764 if (fuse_isdeadfs(vp)) {
767 if ((err = vop_stdfdatasync_buf(ap)))
770 return fuse_internal_fsync(vp, td, waitfor, true);
774 struct vnop_fsync_args {
775 struct vop_generic_args a_gen;
778 struct thread * a_td;
782 fuse_vnop_fsync(struct vop_fsync_args *ap)
784 struct vnode *vp = ap->a_vp;
785 struct thread *td = ap->a_td;
786 int waitfor = ap->a_waitfor;
789 if (fuse_isdeadfs(vp)) {
792 if ((err = vop_stdfsync(ap)))
795 return fuse_internal_fsync(vp, td, waitfor, false);
799 struct vnop_getattr_args {
802 struct ucred *a_cred;
807 fuse_vnop_getattr(struct vop_getattr_args *ap)
809 struct vnode *vp = ap->a_vp;
810 struct vattr *vap = ap->a_vap;
811 struct ucred *cred = ap->a_cred;
812 struct thread *td = curthread;
817 dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;
819 /* Note that we are not bailing out on a dead file system just yet. */
821 if (!(dataflags & FSESS_INITED)) {
822 if (!vnode_isvroot(vp)) {
823 fdata_set_dead(fuse_get_mpdata(vnode_mount(vp)));
830 err = fuse_internal_getattr(vp, vap, cred, td);
831 if (err == ENOTCONN && vnode_isvroot(vp)) {
832 /* see comment in fuse_vfsop_statfs() */
839 bzero(vap, sizeof(*vap));
840 vap->va_type = vnode_vtype(vp);
846 struct vnop_inactive_args {
852 fuse_vnop_inactive(struct vop_inactive_args *ap)
854 struct vnode *vp = ap->a_vp;
855 struct thread *td = ap->a_td;
857 struct fuse_vnode_data *fvdat = VTOFUD(vp);
858 struct fuse_filehandle *fufh, *fufh_tmp;
862 LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) {
863 if (need_flush && vp->v_type == VREG) {
864 if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {
865 fuse_vnode_savesize(vp, NULL, 0);
867 if ((fvdat->flag & FN_REVOKED) != 0)
868 fuse_io_invalbuf(vp, td);
870 fuse_io_flushbuf(vp, MNT_WAIT, td);
873 fuse_filehandle_close(vp, fufh, td, NULL);
876 if ((fvdat->flag & FN_REVOKED) != 0)
883 struct vnop_link_args {
884 struct vnode *a_tdvp;
886 struct componentname *a_cnp;
890 fuse_vnop_link(struct vop_link_args *ap)
892 struct vnode *vp = ap->a_vp;
893 struct vnode *tdvp = ap->a_tdvp;
894 struct componentname *cnp = ap->a_cnp;
896 struct vattr *vap = VTOVA(vp);
898 struct fuse_dispatcher fdi;
899 struct fuse_entry_out *feo;
900 struct fuse_link_in fli;
904 if (fuse_isdeadfs(vp)) {
907 if (vnode_mount(tdvp) != vnode_mount(vp)) {
912 * This is a seatbelt check to protect naive userspace filesystems from
913 * themselves and the limitations of the FUSE IPC protocol. If a
914 * filesystem does not allow attribute caching, assume it is capable of
915 * validating that nlink does not overflow.
917 if (vap != NULL && vap->va_nlink >= FUSE_LINK_MAX)
919 fli.oldnodeid = VTOI(vp);
922 fuse_internal_newentry_makerequest(vnode_mount(tdvp), VTOI(tdvp), cnp,
923 FUSE_LINK, &fli, sizeof(fli), &fdi);
924 if ((err = fdisp_wait_answ(&fdi))) {
929 err = fuse_internal_checkentry(feo, vnode_vtype(vp));
932 * Purge the parent's attribute cache because the daemon
933 * should've updated its mtime and ctime
935 fuse_vnode_clear_attr_cache(tdvp);
936 fuse_internal_cache_attrs(vp, &feo->attr, feo->attr_valid,
937 feo->attr_valid_nsec, NULL);
944 struct fuse_lookup_alloc_arg {
945 struct fuse_entry_out *feo;
946 struct componentname *cnp;
951 /* Callback for vn_get_ino */
953 fuse_lookup_alloc(struct mount *mp, void *arg, int lkflags, struct vnode **vpp)
955 struct fuse_lookup_alloc_arg *flaa = arg;
957 return fuse_vnode_get(mp, flaa->feo, flaa->nid, NULL, vpp, flaa->cnp,
961 SDT_PROBE_DEFINE3(fusefs, , vnops, cache_lookup,
962 "int", "struct timespec*", "struct timespec*");
964 struct vnop_lookup_args {
965 struct vnodeop_desc *a_desc;
967 struct vnode **a_vpp;
968 struct componentname *a_cnp;
972 fuse_vnop_lookup(struct vop_lookup_args *ap)
974 struct vnode *dvp = ap->a_dvp;
975 struct vnode **vpp = ap->a_vpp;
976 struct componentname *cnp = ap->a_cnp;
977 struct thread *td = cnp->cn_thread;
978 struct ucred *cred = cnp->cn_cred;
980 int nameiop = cnp->cn_nameiop;
981 int flags = cnp->cn_flags;
982 int wantparent = flags & (LOCKPARENT | WANTPARENT);
983 int islastcn = flags & ISLASTCN;
984 struct mount *mp = vnode_mount(dvp);
988 struct vnode *vp = NULL;
990 struct fuse_dispatcher fdi;
991 bool did_lookup = false;
992 struct fuse_entry_out *feo = NULL;
993 enum vtype vtyp; /* vnode type of target */
994 off_t filesize; /* filesize of target */
998 if (fuse_isdeadfs(dvp)) {
1002 if (!vnode_isdir(dvp))
1005 if (islastcn && vfs_isrdonly(mp) && (nameiop != LOOKUP))
1008 if ((err = fuse_internal_access(dvp, VEXEC, td, cred)))
1011 if (flags & ISDOTDOT) {
1012 KASSERT(VTOFUD(dvp)->flag & FN_PARENT_NID,
1013 ("Looking up .. is TODO"));
1014 nid = VTOFUD(dvp)->parent_nid;
1017 /* .. is obviously a directory */
1020 } else if (cnp->cn_namelen == 1 && *(cnp->cn_nameptr) == '.') {
1022 /* . is obviously a directory */
1026 struct timespec now, timeout;
1028 err = cache_lookup(dvp, vpp, cnp, &timeout, NULL);
1029 getnanouptime(&now);
1030 SDT_PROBE3(fusefs, , vnops, cache_lookup, err, &timeout, &now);
1032 case -1: /* positive match */
1033 if (timespeccmp(&timeout, &now, >)) {
1034 counter_u64_add(fuse_lookup_cache_hits, 1);
1037 counter_u64_add(fuse_lookup_cache_misses, 1);
1039 &VTOFUD(*vpp)->entry_cache_timeout);
1050 case 0: /* no match in cache */
1051 counter_u64_add(fuse_lookup_cache_misses, 1);
1054 case ENOENT: /* negative match */
1055 getnanouptime(&now);
1056 if (timespeccmp(&timeout, &now, <=)) {
1058 cache_purge_negative(dvp);
1067 fdisp_init(&fdi, cnp->cn_namelen + 1);
1068 fdisp_make(&fdi, FUSE_LOOKUP, mp, nid, td, cred);
1070 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
1071 ((char *)fdi.indata)[cnp->cn_namelen] = '\0';
1072 lookup_err = fdisp_wait_answ(&fdi);
1076 /* lookup call succeeded */
1077 feo = (struct fuse_entry_out *)fdi.answ;
1080 /* zero nodeid means ENOENT and cache it */
1081 struct timespec timeout;
1083 fdi.answ_stat = ENOENT;
1084 lookup_err = ENOENT;
1085 if (cnp->cn_flags & MAKEENTRY) {
1086 fuse_validity_2_timespec(feo, &timeout);
1087 cache_enter_time(dvp, *vpp, cnp,
1090 } else if (nid == FUSE_ROOT_ID) {
1091 lookup_err = EINVAL;
1093 vtyp = IFTOVT(feo->attr.mode);
1094 filesize = feo->attr.size;
1096 if (lookup_err && (!fdi.answ_stat || lookup_err != ENOENT)) {
1097 fdisp_destroy(&fdi);
1101 /* lookup_err, if non-zero, must be ENOENT at this point */
1104 /* Entry not found */
1105 if ((nameiop == CREATE || nameiop == RENAME) && islastcn) {
1106 err = fuse_internal_access(dvp, VWRITE, td, cred);
1109 * Set the SAVENAME flag to hold onto the
1110 * pathname for use later in VOP_CREATE or
1113 cnp->cn_flags |= SAVENAME;
1121 /* Entry was found */
1122 if (flags & ISDOTDOT) {
1123 struct fuse_lookup_alloc_arg flaa;
1129 err = vn_vget_ino_gen(dvp, fuse_lookup_alloc, &flaa, 0,
1132 } else if (nid == VTOI(dvp)) {
1136 struct fuse_vnode_data *fvdat;
1138 err = fuse_vnode_get(vnode_mount(dvp), feo, nid, dvp,
1145 * In the case where we are looking up a FUSE node
1146 * represented by an existing cached vnode, and the
1147 * true size reported by FUSE_LOOKUP doesn't match
1148 * the vnode's cached size, then any cached writes
1149 * beyond the file's current size are lost.
1152 * * following attribute cache expiration, or
1153 * * due a bug in the daemon, or
1156 if (vnode_isreg(vp) &&
1157 filesize != fvdat->cached_attrs.va_size &&
1158 fvdat->flag & FN_SIZECHANGE) {
1160 * The FN_SIZECHANGE flag reflects a dirty
1161 * append. If userspace lets us know our cache
1162 * is invalid, that write was lost. (Dirty
1163 * writes that do not cause append are also
1164 * lost, but we don't detect them here.)
1166 * XXX: Maybe disable WB caching on this mount.
1168 printf("%s: WB cache incoherent on %s!\n",
1170 vnode_mount(vp)->mnt_stat.f_mntonname);
1172 fvdat->flag &= ~FN_SIZECHANGE;
1176 fuse_internal_cache_attrs(*vpp, &feo->attr,
1177 feo->attr_valid, feo->attr_valid_nsec, NULL);
1178 fuse_validity_2_bintime(feo->entry_valid,
1179 feo->entry_valid_nsec,
1180 &fvdat->entry_cache_timeout);
1182 if ((nameiop == DELETE || nameiop == RENAME) &&
1185 struct vattr dvattr;
1187 err = fuse_internal_access(dvp, VWRITE, td,
1192 * if the parent's sticky bit is set, check
1193 * whether we're allowed to remove the file.
1194 * Need to figure out the vnode locking to make
1197 fuse_internal_getattr(dvp, &dvattr, cred, td);
1198 if ((dvattr.va_mode & S_ISTXT) &&
1199 fuse_internal_access(dvp, VADMIN, td,
1201 fuse_internal_access(*vpp, VADMIN, td,
1209 (nameiop == DELETE) ||
1210 (nameiop == RENAME && wantparent))) {
1211 cnp->cn_flags |= SAVENAME;
1218 if (vp != NULL && dvp != vp)
1220 else if (vp != NULL)
1225 fdisp_destroy(&fdi);
1231 struct vnop_mkdir_args {
1232 struct vnode *a_dvp;
1233 struct vnode **a_vpp;
1234 struct componentname *a_cnp;
1235 struct vattr *a_vap;
1239 fuse_vnop_mkdir(struct vop_mkdir_args *ap)
1241 struct vnode *dvp = ap->a_dvp;
1242 struct vnode **vpp = ap->a_vpp;
1243 struct componentname *cnp = ap->a_cnp;
1244 struct vattr *vap = ap->a_vap;
1246 struct fuse_mkdir_in fmdi;
1248 if (fuse_isdeadfs(dvp)) {
1251 fmdi.mode = MAKEIMODE(vap->va_type, vap->va_mode);
1252 fmdi.umask = curthread->td_proc->p_fd->fd_cmask;
1254 return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKDIR, &fmdi,
1255 sizeof(fmdi), VDIR));
1259 struct vnop_mknod_args {
1260 struct vnode *a_dvp;
1261 struct vnode **a_vpp;
1262 struct componentname *a_cnp;
1263 struct vattr *a_vap;
1267 fuse_vnop_mknod(struct vop_mknod_args *ap)
1270 struct vnode *dvp = ap->a_dvp;
1271 struct vnode **vpp = ap->a_vpp;
1272 struct componentname *cnp = ap->a_cnp;
1273 struct vattr *vap = ap->a_vap;
1275 if (fuse_isdeadfs(dvp))
1278 return fuse_internal_mknod(dvp, vpp, cnp, vap);
1282 struct vop_open_args {
1285 struct ucred *a_cred;
1286 struct thread *a_td;
1287 int a_fdidx; / struct file *a_fp;
1291 fuse_vnop_open(struct vop_open_args *ap)
1293 struct vnode *vp = ap->a_vp;
1294 int a_mode = ap->a_mode;
1295 struct thread *td = ap->a_td;
1296 struct ucred *cred = ap->a_cred;
1297 pid_t pid = td->td_proc->p_pid;
1298 struct fuse_vnode_data *fvdat;
1300 if (fuse_isdeadfs(vp))
1302 if (vp->v_type == VCHR || vp->v_type == VBLK || vp->v_type == VFIFO)
1303 return (EOPNOTSUPP);
1304 if ((a_mode & (FREAD | FWRITE | FEXEC)) == 0)
1309 if (fuse_filehandle_validrw(vp, a_mode, cred, pid)) {
1310 fuse_vnode_open(vp, 0, td);
1314 return fuse_filehandle_open(vp, a_mode, NULL, td, cred);
1318 fuse_vnop_pathconf(struct vop_pathconf_args *ap)
1321 switch (ap->a_name) {
1322 case _PC_FILESIZEBITS:
1326 *ap->a_retval = NAME_MAX;
1329 *ap->a_retval = MIN(LONG_MAX, FUSE_LINK_MAX);
1331 case _PC_SYMLINK_MAX:
1332 *ap->a_retval = MAXPATHLEN;
1338 return (vop_stdpathconf(ap));
1343 struct vnop_read_args {
1347 struct ucred *a_cred;
1351 fuse_vnop_read(struct vop_read_args *ap)
1353 struct vnode *vp = ap->a_vp;
1354 struct uio *uio = ap->a_uio;
1355 int ioflag = ap->a_ioflag;
1356 struct ucred *cred = ap->a_cred;
1357 pid_t pid = curthread->td_proc->p_pid;
1359 if (fuse_isdeadfs(vp)) {
1363 if (VTOFUD(vp)->flag & FN_DIRECTIO) {
1364 ioflag |= IO_DIRECT;
1367 return fuse_io_dispatch(vp, uio, ioflag, cred, pid);
1371 struct vnop_readdir_args {
1374 struct ucred *a_cred;
1381 fuse_vnop_readdir(struct vop_readdir_args *ap)
1383 struct vnode *vp = ap->a_vp;
1384 struct uio *uio = ap->a_uio;
1385 struct ucred *cred = ap->a_cred;
1386 struct fuse_filehandle *fufh = NULL;
1387 struct fuse_iov cookediov;
1393 bool closefufh = false;
1394 pid_t pid = curthread->td_proc->p_pid;
1398 if (fuse_isdeadfs(vp)) {
1401 if ( /* XXXIP ((uio_iovcnt(uio) > 1)) || */
1402 (uio_resid(uio) < sizeof(struct dirent))) {
1406 tresid = uio->uio_resid;
1407 startoff = uio->uio_offset;
1408 err = fuse_filehandle_get_dir(vp, &fufh, cred, pid);
1409 if (err == EBADF && vnode_mount(vp)->mnt_flag & MNT_EXPORTED) {
1411 * nfsd will do VOP_READDIR without first doing VOP_OPEN. We
1412 * must implicitly open the directory here
1414 err = fuse_filehandle_open(vp, FREAD, &fufh, curthread, cred);
1417 * When a directory is opened, it must be read from
1418 * the beginning. Hopefully, the "startoff" still
1419 * exists as an offset cookie for the directory.
1420 * If not, it will read the entire directory without
1421 * returning any entries and just return eof.
1423 uio->uio_offset = 0;
1429 if (ap->a_ncookies != NULL) {
1430 ncookies = uio->uio_resid /
1431 (offsetof(struct dirent, d_name) + 4) + 1;
1432 cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK);
1433 *ap->a_ncookies = ncookies;
1434 *ap->a_cookies = cookies;
1439 #define DIRCOOKEDSIZE FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + MAXNAMLEN + 1)
1440 fiov_init(&cookediov, DIRCOOKEDSIZE);
1442 err = fuse_internal_readdir(vp, uio, startoff, fufh, &cookediov,
1443 &ncookies, cookies);
1445 fiov_teardown(&cookediov);
1447 fuse_filehandle_close(vp, fufh, curthread, cred);
1449 if (ap->a_ncookies != NULL) {
1451 *ap->a_ncookies -= ncookies;
1453 free(*ap->a_cookies, M_TEMP);
1454 *ap->a_ncookies = 0;
1455 *ap->a_cookies = NULL;
1458 if (err == 0 && tresid == uio->uio_resid)
1465 struct vnop_readlink_args {
1468 struct ucred *a_cred;
1472 fuse_vnop_readlink(struct vop_readlink_args *ap)
1474 struct vnode *vp = ap->a_vp;
1475 struct uio *uio = ap->a_uio;
1476 struct ucred *cred = ap->a_cred;
1478 struct fuse_dispatcher fdi;
1481 if (fuse_isdeadfs(vp)) {
1484 if (!vnode_islnk(vp)) {
1487 fdisp_init(&fdi, 0);
1488 err = fdisp_simple_putget_vp(&fdi, FUSE_READLINK, vp, curthread, cred);
1492 if (((char *)fdi.answ)[0] == '/' &&
1493 fuse_get_mpdata(vnode_mount(vp))->dataflags & FSESS_PUSH_SYMLINKS_IN) {
1494 char *mpth = vnode_mount(vp)->mnt_stat.f_mntonname;
1496 err = uiomove(mpth, strlen(mpth), uio);
1499 err = uiomove(fdi.answ, fdi.iosize, uio);
1502 fdisp_destroy(&fdi);
1507 struct vnop_reclaim_args {
1509 struct thread *a_td;
1513 fuse_vnop_reclaim(struct vop_reclaim_args *ap)
1515 struct vnode *vp = ap->a_vp;
1516 struct thread *td = ap->a_td;
1517 struct fuse_vnode_data *fvdat = VTOFUD(vp);
1518 struct fuse_filehandle *fufh, *fufh_tmp;
1521 panic("FUSE: no vnode data during recycling");
1523 LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) {
1524 printf("FUSE: vnode being reclaimed with open fufh "
1525 "(type=%#x)", fufh->fufh_type);
1526 fuse_filehandle_close(vp, fufh, td, NULL);
1529 if ((!fuse_isdeadfs(vp)) && (fvdat->nlookup)) {
1530 fuse_internal_forget_send(vnode_mount(vp), td, NULL, VTOI(vp),
1533 fuse_vnode_setparent(vp, NULL);
1535 vfs_hash_remove(vp);
1536 vnode_destroy_vobject(vp);
1537 fuse_vnode_destroy(vp);
1543 struct vnop_remove_args {
1544 struct vnode *a_dvp;
1546 struct componentname *a_cnp;
1550 fuse_vnop_remove(struct vop_remove_args *ap)
1552 struct vnode *dvp = ap->a_dvp;
1553 struct vnode *vp = ap->a_vp;
1554 struct componentname *cnp = ap->a_cnp;
1558 if (fuse_isdeadfs(vp)) {
1561 if (vnode_isdir(vp)) {
1565 err = fuse_internal_remove(dvp, vp, cnp, FUSE_UNLINK);
1571 struct vnop_rename_args {
1572 struct vnode *a_fdvp;
1573 struct vnode *a_fvp;
1574 struct componentname *a_fcnp;
1575 struct vnode *a_tdvp;
1576 struct vnode *a_tvp;
1577 struct componentname *a_tcnp;
1581 fuse_vnop_rename(struct vop_rename_args *ap)
1583 struct vnode *fdvp = ap->a_fdvp;
1584 struct vnode *fvp = ap->a_fvp;
1585 struct componentname *fcnp = ap->a_fcnp;
1586 struct vnode *tdvp = ap->a_tdvp;
1587 struct vnode *tvp = ap->a_tvp;
1588 struct componentname *tcnp = ap->a_tcnp;
1589 struct fuse_data *data;
1590 bool newparent = fdvp != tdvp;
1591 bool isdir = fvp->v_type == VDIR;
1594 if (fuse_isdeadfs(fdvp)) {
1597 if (fvp->v_mount != tdvp->v_mount ||
1598 (tvp && fvp->v_mount != tvp->v_mount)) {
1599 SDT_PROBE2(fusefs, , vnops, trace, 1, "cross-device rename");
1606 * FUSE library is expected to check if target directory is not
1607 * under the source directory in the file system tree.
1608 * Linux performs this check at VFS level.
1611 * If source is a directory, and it will get a new parent, user must
1612 * have write permission to it, so ".." can be modified.
1614 data = fuse_get_mpdata(vnode_mount(tdvp));
1615 if (data->dataflags & FSESS_DEFAULT_PERMISSIONS && isdir && newparent) {
1616 err = fuse_internal_access(fvp, VWRITE,
1617 tcnp->cn_thread, tcnp->cn_cred);
1621 sx_xlock(&data->rename_lock);
1622 err = fuse_internal_rename(fdvp, fcnp, tdvp, tcnp);
1625 fuse_vnode_setparent(fvp, tdvp);
1627 fuse_vnode_setparent(tvp, NULL);
1629 sx_unlock(&data->rename_lock);
1631 if (tvp != NULL && tvp != fvp) {
1634 if (vnode_isdir(fvp)) {
1635 if ((tvp != NULL) && vnode_isdir(tvp)) {
1656 struct vnop_rmdir_args {
1657 struct vnode *a_dvp;
1659 struct componentname *a_cnp;
1663 fuse_vnop_rmdir(struct vop_rmdir_args *ap)
1665 struct vnode *dvp = ap->a_dvp;
1666 struct vnode *vp = ap->a_vp;
1670 if (fuse_isdeadfs(vp)) {
1673 if (VTOFUD(vp) == VTOFUD(dvp)) {
1676 err = fuse_internal_remove(dvp, vp, ap->a_cnp, FUSE_RMDIR);
1682 struct vnop_setattr_args {
1684 struct vattr *a_vap;
1685 struct ucred *a_cred;
1686 struct thread *a_td;
1690 fuse_vnop_setattr(struct vop_setattr_args *ap)
1692 struct vnode *vp = ap->a_vp;
1693 struct vattr *vap = ap->a_vap;
1694 struct ucred *cred = ap->a_cred;
1695 struct thread *td = curthread;
1697 struct fuse_data *data;
1698 struct vattr old_va;
1701 accmode_t accmode = 0;
1703 bool drop_suid = false;
1706 mp = vnode_mount(vp);
1707 data = fuse_get_mpdata(mp);
1708 dataflags = data->dataflags;
1709 checkperm = dataflags & FSESS_DEFAULT_PERMISSIONS;
1710 if (cred->cr_ngroups > 0)
1711 cr_gid = cred->cr_groups[0];
1715 if (fuse_isdeadfs(vp)) {
1719 if (vap->va_uid != (uid_t)VNOVAL) {
1721 /* Only root may change a file's owner */
1722 err = priv_check_cred(cred, PRIV_VFS_CHOWN, 0);
1724 /* As a special case, allow the null chown */
1725 err2 = fuse_internal_getattr(vp, &old_va, cred,
1729 if (vap->va_uid != old_va.va_uid)
1739 if (vap->va_gid != (gid_t)VNOVAL) {
1740 if (checkperm && priv_check_cred(cred, PRIV_VFS_CHOWN, 0))
1742 if (checkperm && !groupmember(vap->va_gid, cred))
1745 * Non-root users may only chgrp to one of their own
1748 err = priv_check_cred(cred, PRIV_VFS_CHOWN, 0);
1750 /* As a special case, allow the null chgrp */
1751 err2 = fuse_internal_getattr(vp, &old_va, cred,
1755 if (vap->va_gid != old_va.va_gid)
1763 if (vap->va_size != VNOVAL) {
1764 switch (vp->v_type) {
1769 if (vfs_isrdonly(mp))
1774 * According to POSIX, the result is unspecified
1775 * for file types other than regular files,
1776 * directories and shared memory objects. We
1777 * don't support shared memory objects in the file
1778 * system, and have dubious support for truncating
1779 * symlinks. Just ignore the request in other cases.
1783 /* Don't set accmode. Permission to trunc is checked upstack */
1785 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
1786 if (vap->va_vaflags & VA_UTIMES_NULL)
1792 if (vap->va_mode != (mode_t)VNOVAL)
1793 vap->va_mode &= ~(S_ISUID | S_ISGID);
1795 err = fuse_internal_getattr(vp, &old_va, cred, td);
1798 vap->va_mode = old_va.va_mode & ~(S_ISUID | S_ISGID);
1801 if (vap->va_mode != (mode_t)VNOVAL) {
1802 /* Only root may set the sticky bit on non-directories */
1803 if (checkperm && vp->v_type != VDIR && (vap->va_mode & S_ISTXT)
1804 && priv_check_cred(cred, PRIV_VFS_STICKYFILE, 0))
1806 if (checkperm && (vap->va_mode & S_ISGID)) {
1807 err = fuse_internal_getattr(vp, &old_va, cred, td);
1810 if (!groupmember(old_va.va_gid, cred)) {
1811 err = priv_check_cred(cred, PRIV_VFS_SETGID, 0);
1819 if (vfs_isrdonly(mp))
1822 err = fuse_internal_access(vp, accmode, td, cred);
1826 return fuse_internal_setattr(vp, vap, td, cred);
1830 struct vnop_strategy_args {
1836 fuse_vnop_strategy(struct vop_strategy_args *ap)
1838 struct vnode *vp = ap->a_vp;
1839 struct buf *bp = ap->a_bp;
1841 if (!vp || fuse_isdeadfs(vp)) {
1842 bp->b_ioflags |= BIO_ERROR;
1843 bp->b_error = ENXIO;
1849 * VOP_STRATEGY always returns zero and signals error via bp->b_ioflags.
1850 * fuse_io_strategy sets bp's error fields
1852 (void)fuse_io_strategy(vp, bp);
1859 struct vnop_symlink_args {
1860 struct vnode *a_dvp;
1861 struct vnode **a_vpp;
1862 struct componentname *a_cnp;
1863 struct vattr *a_vap;
1868 fuse_vnop_symlink(struct vop_symlink_args *ap)
1870 struct vnode *dvp = ap->a_dvp;
1871 struct vnode **vpp = ap->a_vpp;
1872 struct componentname *cnp = ap->a_cnp;
1873 char *target = ap->a_target;
1875 struct fuse_dispatcher fdi;
1880 if (fuse_isdeadfs(dvp)) {
1884 * Unlike the other creator type calls, here we have to create a message
1885 * where the name of the new entry comes first, and the data describing
1886 * the entry comes second.
1887 * Hence we can't rely on our handy fuse_internal_newentry() routine,
1888 * but put together the message manually and just call the core part.
1891 len = strlen(target) + 1;
1892 fdisp_init(&fdi, len + cnp->cn_namelen + 1);
1893 fdisp_make_vp(&fdi, FUSE_SYMLINK, dvp, curthread, NULL);
1895 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
1896 ((char *)fdi.indata)[cnp->cn_namelen] = '\0';
1897 memcpy((char *)fdi.indata + cnp->cn_namelen + 1, target, len);
1899 err = fuse_internal_newentry_core(dvp, vpp, cnp, VLNK, &fdi);
1900 fdisp_destroy(&fdi);
1905 struct vnop_write_args {
1909 struct ucred *a_cred;
1913 fuse_vnop_write(struct vop_write_args *ap)
1915 struct vnode *vp = ap->a_vp;
1916 struct uio *uio = ap->a_uio;
1917 int ioflag = ap->a_ioflag;
1918 struct ucred *cred = ap->a_cred;
1919 pid_t pid = curthread->td_proc->p_pid;
1921 if (fuse_isdeadfs(vp)) {
1925 if (VTOFUD(vp)->flag & FN_DIRECTIO) {
1926 ioflag |= IO_DIRECT;
1929 return fuse_io_dispatch(vp, uio, ioflag, cred, pid);
1933 fuse_gbp_getblkno(struct vnode *vp, vm_ooffset_t off)
1935 const int biosize = fuse_iosize(vp);
1937 return (off / biosize);
1941 fuse_gbp_getblksz(struct vnode *vp, daddr_t lbn)
1945 const int biosize = fuse_iosize(vp);
1947 err = fuse_vnode_size(vp, &filesize, NULL, NULL);
1948 KASSERT(err == 0, ("vfs_bio_getpages can't handle errors here"));
1952 if ((off_t)lbn * biosize >= filesize) {
1954 } else if ((off_t)(lbn + 1) * biosize > filesize) {
1955 blksz = filesize - (off_t)lbn *biosize;
1963 struct vnop_getpages_args {
1971 fuse_vnop_getpages(struct vop_getpages_args *ap)
1973 struct vnode *vp = ap->a_vp;
1975 if (!fsess_opt_mmap(vnode_mount(vp))) {
1976 SDT_PROBE2(fusefs, , vnops, trace, 1,
1977 "called on non-cacheable vnode??\n");
1978 return (VM_PAGER_ERROR);
1981 return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, ap->a_rbehind,
1982 ap->a_rahead, fuse_gbp_getblkno, fuse_gbp_getblksz));
1985 static const char extattr_namespace_separator = '.';
1988 struct vop_getextattr_args {
1989 struct vop_generic_args a_gen;
1991 int a_attrnamespace;
1995 struct ucred *a_cred;
1996 struct thread *a_td;
2000 fuse_vnop_getextattr(struct vop_getextattr_args *ap)
2002 struct vnode *vp = ap->a_vp;
2003 struct uio *uio = ap->a_uio;
2004 struct fuse_dispatcher fdi;
2005 struct fuse_getxattr_in *get_xattr_in;
2006 struct fuse_getxattr_out *get_xattr_out;
2007 struct mount *mp = vnode_mount(vp);
2008 struct thread *td = ap->a_td;
2009 struct ucred *cred = ap->a_cred;
2015 if (fuse_isdeadfs(vp))
2018 if (!fsess_isimpl(mp, FUSE_GETXATTR))
2021 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD);
2025 /* Default to looking for user attributes. */
2026 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2027 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2029 prefix = EXTATTR_NAMESPACE_USER_STRING;
2031 len = strlen(prefix) + sizeof(extattr_namespace_separator) +
2032 strlen(ap->a_name) + 1;
2034 fdisp_init(&fdi, len + sizeof(*get_xattr_in));
2035 fdisp_make_vp(&fdi, FUSE_GETXATTR, vp, td, cred);
2037 get_xattr_in = fdi.indata;
2039 * Check to see whether we're querying the available size or
2040 * issuing the actual request. If we pass in 0, we get back struct
2041 * fuse_getxattr_out. If we pass in a non-zero size, we get back
2042 * that much data, without the struct fuse_getxattr_out header.
2045 get_xattr_in->size = 0;
2047 get_xattr_in->size = uio->uio_resid;
2049 attr_str = (char *)fdi.indata + sizeof(*get_xattr_in);
2050 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
2053 err = fdisp_wait_answ(&fdi);
2055 if (err == ENOSYS) {
2056 fsess_set_notimpl(mp, FUSE_GETXATTR);
2062 get_xattr_out = fdi.answ;
2064 if (ap->a_size != NULL)
2065 *ap->a_size = get_xattr_out->size;
2068 err = uiomove(fdi.answ, fdi.iosize, uio);
2071 fdisp_destroy(&fdi);
2076 struct vop_setextattr_args {
2077 struct vop_generic_args a_gen;
2079 int a_attrnamespace;
2082 struct ucred *a_cred;
2083 struct thread *a_td;
2087 fuse_vnop_setextattr(struct vop_setextattr_args *ap)
2089 struct vnode *vp = ap->a_vp;
2090 struct uio *uio = ap->a_uio;
2091 struct fuse_dispatcher fdi;
2092 struct fuse_setxattr_in *set_xattr_in;
2093 struct mount *mp = vnode_mount(vp);
2094 struct thread *td = ap->a_td;
2095 struct ucred *cred = ap->a_cred;
2101 if (fuse_isdeadfs(vp))
2104 if (!fsess_isimpl(mp, FUSE_SETXATTR))
2107 if (vfs_isrdonly(mp))
2110 /* Deleting xattrs must use VOP_DELETEEXTATTR instead */
2111 if (ap->a_uio == NULL) {
2113 * If we got here as fallback from VOP_DELETEEXTATTR, then
2114 * return EOPNOTSUPP.
2116 if (!fsess_isimpl(mp, FUSE_REMOVEXATTR))
2117 return (EOPNOTSUPP);
2122 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td,
2127 /* Default to looking for user attributes. */
2128 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2129 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2131 prefix = EXTATTR_NAMESPACE_USER_STRING;
2133 len = strlen(prefix) + sizeof(extattr_namespace_separator) +
2134 strlen(ap->a_name) + 1;
2136 fdisp_init(&fdi, len + sizeof(*set_xattr_in) + uio->uio_resid);
2137 fdisp_make_vp(&fdi, FUSE_SETXATTR, vp, td, cred);
2139 set_xattr_in = fdi.indata;
2140 set_xattr_in->size = uio->uio_resid;
2142 attr_str = (char *)fdi.indata + sizeof(*set_xattr_in);
2143 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
2146 err = uiomove((char *)fdi.indata + sizeof(*set_xattr_in) + len,
2147 uio->uio_resid, uio);
2152 err = fdisp_wait_answ(&fdi);
2154 if (err == ENOSYS) {
2155 fsess_set_notimpl(mp, FUSE_SETXATTR);
2158 if (err == ERESTART) {
2159 /* Can't restart after calling uiomove */
2164 fdisp_destroy(&fdi);
2169 * The Linux / FUSE extended attribute list is simply a collection of
2170 * NUL-terminated strings. The FreeBSD extended attribute list is a single
2171 * byte length followed by a non-NUL terminated string. So, this allows
2172 * conversion of the Linux / FUSE format to the FreeBSD format in place.
2173 * Linux attribute names are reported with the namespace as a prefix (e.g.
2174 * "user.attribute_name"), but in FreeBSD they are reported without the
2175 * namespace prefix (e.g. "attribute_name"). So, we're going from:
2177 * user.attr_name1\0user.attr_name2\0
2181 * <num>attr_name1<num>attr_name2
2183 * Where "<num>" is a single byte number of characters in the attribute name.
2186 * prefix - exattr namespace prefix string
2187 * list, list_len - input list with namespace prefixes
2188 * bsd_list, bsd_list_len - output list compatible with bsd vfs
2191 fuse_xattrlist_convert(char *prefix, const char *list, int list_len,
2192 char *bsd_list, int *bsd_list_len)
2194 int len, pos, dist_to_next, prefix_len;
2198 prefix_len = strlen(prefix);
2200 while (pos < list_len && list[pos] != '\0') {
2201 dist_to_next = strlen(&list[pos]) + 1;
2202 if (bcmp(&list[pos], prefix, prefix_len) == 0 &&
2203 list[pos + prefix_len] == extattr_namespace_separator) {
2204 len = dist_to_next -
2205 (prefix_len + sizeof(extattr_namespace_separator)) - 1;
2206 if (len >= EXTATTR_MAXNAMELEN)
2207 return (ENAMETOOLONG);
2209 bsd_list[*bsd_list_len] = len;
2210 memcpy(&bsd_list[*bsd_list_len + 1],
2211 &list[pos + prefix_len +
2212 sizeof(extattr_namespace_separator)], len);
2214 *bsd_list_len += len + 1;
2217 pos += dist_to_next;
2224 * List extended attributes
2226 * The FUSE_LISTXATTR operation is based on Linux's listxattr(2) syscall, which
2227 * has a number of differences compared to its FreeBSD equivalent,
2228 * extattr_list_file:
2230 * - FUSE_LISTXATTR returns all extended attributes across all namespaces,
2231 * whereas listxattr(2) only returns attributes for a single namespace
2232 * - FUSE_LISTXATTR prepends each attribute name with "namespace."
2233 * - If the provided buffer is not large enough to hold the result,
2234 * FUSE_LISTXATTR should return ERANGE, whereas listxattr is expected to
2235 * return as many results as will fit.
2238 struct vop_listextattr_args {
2239 struct vop_generic_args a_gen;
2241 int a_attrnamespace;
2244 struct ucred *a_cred;
2245 struct thread *a_td;
2249 fuse_vnop_listextattr(struct vop_listextattr_args *ap)
2251 struct vnode *vp = ap->a_vp;
2252 struct uio *uio = ap->a_uio;
2253 struct fuse_dispatcher fdi;
2254 struct fuse_listxattr_in *list_xattr_in;
2255 struct fuse_listxattr_out *list_xattr_out;
2256 struct mount *mp = vnode_mount(vp);
2257 struct thread *td = ap->a_td;
2258 struct ucred *cred = ap->a_cred;
2260 char *bsd_list = NULL;
2266 if (fuse_isdeadfs(vp))
2269 if (!fsess_isimpl(mp, FUSE_LISTXATTR))
2272 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD);
2277 * Add space for a NUL and the period separator if enabled.
2278 * Default to looking for user attributes.
2280 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2281 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2283 prefix = EXTATTR_NAMESPACE_USER_STRING;
2285 fdisp_init(&fdi, sizeof(*list_xattr_in));
2286 fdisp_make_vp(&fdi, FUSE_LISTXATTR, vp, td, cred);
2289 * Retrieve Linux / FUSE compatible list size.
2291 list_xattr_in = fdi.indata;
2292 list_xattr_in->size = 0;
2294 err = fdisp_wait_answ(&fdi);
2296 if (err == ENOSYS) {
2297 fsess_set_notimpl(mp, FUSE_LISTXATTR);
2303 list_xattr_out = fdi.answ;
2304 linux_list_len = list_xattr_out->size;
2305 if (linux_list_len == 0) {
2306 if (ap->a_size != NULL)
2307 *ap->a_size = linux_list_len;
2312 * Retrieve Linux / FUSE compatible list values.
2314 fdisp_refresh_vp(&fdi, FUSE_LISTXATTR, vp, td, cred);
2315 list_xattr_in = fdi.indata;
2316 list_xattr_in->size = linux_list_len;
2318 err = fdisp_wait_answ(&fdi);
2319 if (err == ERANGE) {
2321 * Race detected. The attribute list must've grown since the
2322 * first FUSE_LISTXATTR call. Start over. Go all the way back
2323 * to userland so we can process signals, if necessary, before
2328 } else if (err != 0)
2331 linux_list = fdi.answ;
2332 /* FUSE doesn't allow the server to return more data than requested */
2333 if (fdi.iosize > linux_list_len) {
2334 printf("WARNING: FUSE protocol violation. Server returned "
2335 "more extended attribute data than requested; "
2336 "should've returned ERANGE instead");
2338 /* But returning less data is fine */
2339 linux_list_len = fdi.iosize;
2343 * Retrieve the BSD compatible list values.
2344 * The Linux / FUSE attribute list format isn't the same
2345 * as FreeBSD's format. So we need to transform it into
2346 * FreeBSD's format before giving it to the user.
2348 bsd_list = malloc(linux_list_len, M_TEMP, M_WAITOK);
2349 err = fuse_xattrlist_convert(prefix, linux_list, linux_list_len,
2350 bsd_list, &bsd_list_len);
2354 if (ap->a_size != NULL)
2355 *ap->a_size = bsd_list_len;
2358 err = uiomove(bsd_list, bsd_list_len, uio);
2361 free(bsd_list, M_TEMP);
2362 fdisp_destroy(&fdi);
2367 struct vop_deleteextattr_args {
2368 struct vop_generic_args a_gen;
2370 int a_attrnamespace;
2372 struct ucred *a_cred;
2373 struct thread *a_td;
2377 fuse_vnop_deleteextattr(struct vop_deleteextattr_args *ap)
2379 struct vnode *vp = ap->a_vp;
2380 struct fuse_dispatcher fdi;
2381 struct mount *mp = vnode_mount(vp);
2382 struct thread *td = ap->a_td;
2383 struct ucred *cred = ap->a_cred;
2389 if (fuse_isdeadfs(vp))
2392 if (!fsess_isimpl(mp, FUSE_REMOVEXATTR))
2395 if (vfs_isrdonly(mp))
2398 err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td,
2403 /* Default to looking for user attributes. */
2404 if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
2405 prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
2407 prefix = EXTATTR_NAMESPACE_USER_STRING;
2409 len = strlen(prefix) + sizeof(extattr_namespace_separator) +
2410 strlen(ap->a_name) + 1;
2412 fdisp_init(&fdi, len);
2413 fdisp_make_vp(&fdi, FUSE_REMOVEXATTR, vp, td, cred);
2415 attr_str = fdi.indata;
2416 snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
2419 err = fdisp_wait_answ(&fdi);
2420 if (err == ENOSYS) {
2421 fsess_set_notimpl(mp, FUSE_REMOVEXATTR);
2425 fdisp_destroy(&fdi);
2430 struct vnop_print_args {
2435 fuse_vnop_print(struct vop_print_args *ap)
2437 struct fuse_vnode_data *fvdat = VTOFUD(ap->a_vp);
2439 printf("nodeid: %ju, parent nodeid: %ju, nlookup: %ju, flag: %#x\n",
2440 (uintmax_t)VTOILLU(ap->a_vp), (uintmax_t)fvdat->parent_nid,
2441 (uintmax_t)fvdat->nlookup,
2448 * Get an NFS filehandle for a FUSE file.
2450 * This will only work for FUSE file systems that guarantee the uniqueness of
2451 * nodeid:generation, which most don't.
2455 IN struct vnode *a_vp;
2456 IN struct fid *a_fhp;
2460 fuse_vnop_vptofh(struct vop_vptofh_args *ap)
2462 struct vnode *vp = ap->a_vp;
2463 struct fuse_vnode_data *fvdat = VTOFUD(vp);
2464 struct fuse_fid *fhp = (struct fuse_fid *)(ap->a_fhp);
2465 _Static_assert(sizeof(struct fuse_fid) <= sizeof(struct fid),
2466 "FUSE fid type is too big");
2467 struct mount *mp = vnode_mount(vp);
2468 struct fuse_data *data = fuse_get_mpdata(mp);
2472 if (!(data->dataflags & FSESS_EXPORT_SUPPORT))
2475 err = fuse_internal_getattr(vp, &va, curthread->td_ucred, curthread);
2479 /*ip = VTOI(ap->a_vp);*/
2480 /*ufhp = (struct ufid *)ap->a_fhp;*/
2481 fhp->len = sizeof(struct fuse_fid);
2482 fhp->nid = fvdat->nid;
2483 if (fvdat->generation <= UINT32_MAX)
2484 fhp->gen = fvdat->generation;