2 * Copyright (c) 2007-2009 Google Inc. and Amit Singh
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
15 * * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * Copyright (C) 2005 Csaba Henk.
32 * All rights reserved.
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
37 * 1. Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * 2. Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in the
41 * documentation and/or other materials provided with the distribution.
43 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56 #include <sys/cdefs.h>
57 __FBSDID("$FreeBSD$");
59 #include <sys/types.h>
60 #include <sys/module.h>
61 #include <sys/systm.h>
62 #include <sys/errno.h>
63 #include <sys/param.h>
64 #include <sys/kernel.h>
67 #include <sys/malloc.h>
68 #include <sys/queue.h>
70 #include <sys/rwlock.h>
73 #include <sys/mount.h>
74 #include <sys/vnode.h>
75 #include <sys/namei.h>
77 #include <sys/unistd.h>
78 #include <sys/filedesc.h>
80 #include <sys/fcntl.h>
81 #include <sys/dirent.h>
84 #include <sys/sysctl.h>
87 #include <vm/vm_extern.h>
89 #include <vm/vm_map.h>
90 #include <vm/vm_page.h>
91 #include <vm/vm_param.h>
92 #include <vm/vm_object.h>
93 #include <vm/vm_pager.h>
94 #include <vm/vnode_pager.h>
95 #include <vm/vm_object.h>
98 #include "fuse_file.h"
99 #include "fuse_internal.h"
100 #include "fuse_ipc.h"
101 #include "fuse_node.h"
102 #include "fuse_param.h"
105 #include <sys/priv.h>
107 #define FUSE_DEBUG_MODULE VNOPS
108 #include "fuse_debug.h"
111 static vop_access_t fuse_vnop_access;
112 static vop_close_t fuse_vnop_close;
113 static vop_create_t fuse_vnop_create;
114 static vop_fsync_t fuse_vnop_fsync;
115 static vop_getattr_t fuse_vnop_getattr;
116 static vop_inactive_t fuse_vnop_inactive;
117 static vop_link_t fuse_vnop_link;
118 static vop_lookup_t fuse_vnop_lookup;
119 static vop_mkdir_t fuse_vnop_mkdir;
120 static vop_mknod_t fuse_vnop_mknod;
121 static vop_open_t fuse_vnop_open;
122 static vop_read_t fuse_vnop_read;
123 static vop_readdir_t fuse_vnop_readdir;
124 static vop_readlink_t fuse_vnop_readlink;
125 static vop_reclaim_t fuse_vnop_reclaim;
126 static vop_remove_t fuse_vnop_remove;
127 static vop_rename_t fuse_vnop_rename;
128 static vop_rmdir_t fuse_vnop_rmdir;
129 static vop_setattr_t fuse_vnop_setattr;
130 static vop_strategy_t fuse_vnop_strategy;
131 static vop_symlink_t fuse_vnop_symlink;
132 static vop_write_t fuse_vnop_write;
133 static vop_getpages_t fuse_vnop_getpages;
134 static vop_putpages_t fuse_vnop_putpages;
135 static vop_print_t fuse_vnop_print;
137 struct vop_vector fuse_vnops = {
138 .vop_default = &default_vnodeops,
139 .vop_access = fuse_vnop_access,
140 .vop_close = fuse_vnop_close,
141 .vop_create = fuse_vnop_create,
142 .vop_fsync = fuse_vnop_fsync,
143 .vop_getattr = fuse_vnop_getattr,
144 .vop_inactive = fuse_vnop_inactive,
145 .vop_link = fuse_vnop_link,
146 .vop_lookup = fuse_vnop_lookup,
147 .vop_mkdir = fuse_vnop_mkdir,
148 .vop_mknod = fuse_vnop_mknod,
149 .vop_open = fuse_vnop_open,
150 .vop_pathconf = vop_stdpathconf,
151 .vop_read = fuse_vnop_read,
152 .vop_readdir = fuse_vnop_readdir,
153 .vop_readlink = fuse_vnop_readlink,
154 .vop_reclaim = fuse_vnop_reclaim,
155 .vop_remove = fuse_vnop_remove,
156 .vop_rename = fuse_vnop_rename,
157 .vop_rmdir = fuse_vnop_rmdir,
158 .vop_setattr = fuse_vnop_setattr,
159 .vop_strategy = fuse_vnop_strategy,
160 .vop_symlink = fuse_vnop_symlink,
161 .vop_write = fuse_vnop_write,
162 .vop_getpages = fuse_vnop_getpages,
163 .vop_putpages = fuse_vnop_putpages,
164 .vop_print = fuse_vnop_print,
167 static u_long fuse_lookup_cache_hits = 0;
169 SYSCTL_ULONG(_vfs_fuse, OID_AUTO, lookup_cache_hits, CTLFLAG_RD,
170 &fuse_lookup_cache_hits, 0, "");
172 static u_long fuse_lookup_cache_misses = 0;
174 SYSCTL_ULONG(_vfs_fuse, OID_AUTO, lookup_cache_misses, CTLFLAG_RD,
175 &fuse_lookup_cache_misses, 0, "");
177 int fuse_lookup_cache_enable = 1;
179 SYSCTL_INT(_vfs_fuse, OID_AUTO, lookup_cache_enable, CTLFLAG_RW,
180 &fuse_lookup_cache_enable, 0, "");
183 * XXX: This feature is highly experimental and can bring to instabilities,
184 * needs revisiting before to be enabled by default.
186 static int fuse_reclaim_revoked = 0;
188 SYSCTL_INT(_vfs_fuse, OID_AUTO, reclaim_revoked, CTLFLAG_RW,
189 &fuse_reclaim_revoked, 0, "");
191 int fuse_pbuf_freecnt = -1;
193 #define fuse_vm_page_lock(m) vm_page_lock((m));
194 #define fuse_vm_page_unlock(m) vm_page_unlock((m));
195 #define fuse_vm_page_lock_queues() ((void)0)
196 #define fuse_vm_page_unlock_queues() ((void)0)
199 struct vnop_access_args {
201 #if VOP_ACCESS_TAKES_ACCMODE_T
206 struct ucred *a_cred;
211 fuse_vnop_access(struct vop_access_args *ap)
213 struct vnode *vp = ap->a_vp;
214 int accmode = ap->a_accmode;
215 struct ucred *cred = ap->a_cred;
217 struct fuse_access_param facp;
218 struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
222 FS_DEBUG2G("inode=%ju\n", (uintmax_t)VTOI(vp));
224 if (fuse_isdeadfs(vp)) {
225 if (vnode_isvroot(vp)) {
230 if (!(data->dataflags & FSESS_INITED)) {
231 if (vnode_isvroot(vp)) {
232 if (priv_check_cred(cred, PRIV_VFS_ADMIN, 0) ||
233 (fuse_match_cred(data->daemoncred, cred) == 0)) {
239 if (vnode_islnk(vp)) {
242 bzero(&facp, sizeof(facp));
244 err = fuse_internal_access(vp, accmode, &facp, ap->a_td, ap->a_cred);
245 FS_DEBUG2G("err=%d accmode=0x%x\n", err, accmode);
250 struct vnop_close_args {
253 struct ucred *a_cred;
258 fuse_vnop_close(struct vop_close_args *ap)
260 struct vnode *vp = ap->a_vp;
261 struct ucred *cred = ap->a_cred;
262 int fflag = ap->a_fflag;
263 fufh_type_t fufh_type;
265 fuse_trace_printf_vnop();
267 if (fuse_isdeadfs(vp)) {
270 if (vnode_isdir(vp)) {
271 if (fuse_filehandle_valid(vp, FUFH_RDONLY)) {
272 fuse_filehandle_close(vp, FUFH_RDONLY, NULL, cred);
276 if (fflag & IO_NDELAY) {
279 fufh_type = fuse_filehandle_xlate_from_fflags(fflag);
281 if (!fuse_filehandle_valid(vp, fufh_type)) {
284 for (i = 0; i < FUFH_MAXTYPE; i++)
285 if (fuse_filehandle_valid(vp, i))
287 if (i == FUFH_MAXTYPE)
288 panic("FUSE: fufh type %d found to be invalid in close"
292 if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {
293 fuse_vnode_savesize(vp, cred);
299 struct vnop_create_args {
301 struct vnode **a_vpp;
302 struct componentname *a_cnp;
307 fuse_vnop_create(struct vop_create_args *ap)
309 struct vnode *dvp = ap->a_dvp;
310 struct vnode **vpp = ap->a_vpp;
311 struct componentname *cnp = ap->a_cnp;
312 struct vattr *vap = ap->a_vap;
313 struct thread *td = cnp->cn_thread;
314 struct ucred *cred = cnp->cn_cred;
316 struct fuse_open_in *foi;
317 struct fuse_entry_out *feo;
318 struct fuse_dispatcher fdi;
319 struct fuse_dispatcher *fdip = &fdi;
323 struct mount *mp = vnode_mount(dvp);
324 uint64_t parentnid = VTOFUD(dvp)->nid;
325 mode_t mode = MAKEIMODE(vap->va_type, vap->va_mode);
327 uint32_t x_open_flags;
329 fuse_trace_printf_vnop();
331 if (fuse_isdeadfs(dvp)) {
334 bzero(&fdi, sizeof(fdi));
336 /* XXX: Will we ever want devices ? */
337 if ((vap->va_type != VREG)) {
338 printf("fuse_vnop_create: unsupported va_type %d\n",
342 debug_printf("parent nid = %ju, mode = %x\n", (uintmax_t)parentnid,
345 fdisp_init(fdip, sizeof(*foi) + cnp->cn_namelen + 1);
346 if (!fsess_isimpl(mp, FUSE_CREATE)) {
347 debug_printf("eh, daemon doesn't implement create?\n");
350 fdisp_make(fdip, FUSE_CREATE, vnode_mount(dvp), parentnid, td, cred);
354 foi->flags = O_CREAT | O_RDWR;
356 memcpy((char *)fdip->indata + sizeof(*foi), cnp->cn_nameptr,
358 ((char *)fdip->indata)[sizeof(*foi) + cnp->cn_namelen] = '\0';
360 err = fdisp_wait_answ(fdip);
364 fsess_set_notimpl(mp, FUSE_CREATE);
365 debug_printf("create: got err=%d from daemon\n", err);
371 if ((err = fuse_internal_checkentry(feo, VREG))) {
374 err = fuse_vnode_get(mp, feo->nodeid, dvp, vpp, cnp, VREG);
376 struct fuse_release_in *fri;
377 uint64_t nodeid = feo->nodeid;
378 uint64_t fh_id = ((struct fuse_open_out *)(feo + 1))->fh;
380 fdisp_init(fdip, sizeof(*fri));
381 fdisp_make(fdip, FUSE_RELEASE, mp, nodeid, td, cred);
384 fri->flags = OFLAGS(mode);
385 fuse_insert_callback(fdip->tick, fuse_internal_forget_callback);
386 fuse_insert_message(fdip->tick);
389 ASSERT_VOP_ELOCKED(*vpp, "fuse_vnop_create");
391 fdip->answ = feo + 1;
393 x_fh_id = ((struct fuse_open_out *)(feo + 1))->fh;
394 x_open_flags = ((struct fuse_open_out *)(feo + 1))->open_flags;
395 fuse_filehandle_init(*vpp, FUFH_RDWR, NULL, x_fh_id);
396 fuse_vnode_open(*vpp, x_open_flags, td);
397 cache_purge_negative(dvp);
405 * Our vnop_fsync roughly corresponds to the FUSE_FSYNC method. The Linux
406 * version of FUSE also has a FUSE_FLUSH method.
408 * On Linux, fsync() synchronizes a file's complete in-core state with that
409 * on disk. The call is not supposed to return until the system has completed
410 * that action or until an error is detected.
412 * Linux also has an fdatasync() call that is similar to fsync() but is not
413 * required to update the metadata such as access time and modification time.
417 struct vnop_fsync_args {
418 struct vnodeop_desc *a_desc;
420 struct ucred * a_cred;
422 struct thread * a_td;
426 fuse_vnop_fsync(struct vop_fsync_args *ap)
428 struct vnode *vp = ap->a_vp;
429 struct thread *td = ap->a_td;
431 struct fuse_filehandle *fufh;
432 struct fuse_vnode_data *fvdat = VTOFUD(vp);
436 fuse_trace_printf_vnop();
438 if (fuse_isdeadfs(vp)) {
441 if ((err = vop_stdfsync(ap)))
444 if (!fsess_isimpl(vnode_mount(vp),
445 (vnode_vtype(vp) == VDIR ? FUSE_FSYNCDIR : FUSE_FSYNC))) {
448 for (type = 0; type < FUFH_MAXTYPE; type++) {
449 fufh = &(fvdat->fufh[type]);
450 if (FUFH_IS_VALID(fufh)) {
451 fuse_internal_fsync(vp, td, NULL, fufh);
460 struct vnop_getattr_args {
463 struct ucred *a_cred;
468 fuse_vnop_getattr(struct vop_getattr_args *ap)
470 struct vnode *vp = ap->a_vp;
471 struct vattr *vap = ap->a_vap;
472 struct ucred *cred = ap->a_cred;
473 struct thread *td = curthread;
474 struct fuse_vnode_data *fvdat = VTOFUD(vp);
478 struct fuse_dispatcher fdi;
480 FS_DEBUG2G("inode=%ju\n", (uintmax_t)VTOI(vp));
482 dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;
484 /* Note that we are not bailing out on a dead file system just yet. */
486 if (!(dataflags & FSESS_INITED)) {
487 if (!vnode_isvroot(vp)) {
488 fdata_set_dead(fuse_get_mpdata(vnode_mount(vp)));
490 debug_printf("fuse_getattr b: returning ENOTCONN\n");
497 if ((err = fdisp_simple_putget_vp(&fdi, FUSE_GETATTR, vp, td, cred))) {
498 if ((err == ENOTCONN) && vnode_isvroot(vp)) {
499 /* see comment at similar place in fuse_statfs() */
504 fuse_internal_vnode_disappear(vp);
508 cache_attrs(vp, (struct fuse_attr_out *)fdi.answ);
509 if (vap != VTOVA(vp)) {
510 memcpy(vap, VTOVA(vp), sizeof(*vap));
512 if (vap->va_type != vnode_vtype(vp)) {
513 fuse_internal_vnode_disappear(vp);
517 if ((fvdat->flag & FN_SIZECHANGE) != 0)
518 vap->va_size = fvdat->filesize;
520 if (vnode_isreg(vp) && (fvdat->flag & FN_SIZECHANGE) == 0) {
522 * This is for those cases when the file size changed without us
523 * knowing, and we want to catch up.
525 off_t new_filesize = ((struct fuse_attr_out *)
526 fdi.answ)->attr.size;
528 if (fvdat->filesize != new_filesize) {
529 fuse_vnode_setsize(vp, cred, new_filesize);
532 debug_printf("fuse_getattr e: returning 0\n");
539 bzero(vap, sizeof(*vap));
540 vap->va_type = vnode_vtype(vp);
546 struct vnop_inactive_args {
552 fuse_vnop_inactive(struct vop_inactive_args *ap)
554 struct vnode *vp = ap->a_vp;
555 struct thread *td = ap->a_td;
557 struct fuse_vnode_data *fvdat = VTOFUD(vp);
558 struct fuse_filehandle *fufh = NULL;
560 int type, need_flush = 1;
562 FS_DEBUG("inode=%ju\n", (uintmax_t)VTOI(vp));
564 for (type = 0; type < FUFH_MAXTYPE; type++) {
565 fufh = &(fvdat->fufh[type]);
566 if (FUFH_IS_VALID(fufh)) {
567 if (need_flush && vp->v_type == VREG) {
568 if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {
569 fuse_vnode_savesize(vp, NULL);
571 if (fuse_data_cache_invalidate ||
572 (fvdat->flag & FN_REVOKED) != 0)
573 fuse_io_invalbuf(vp, td);
575 fuse_io_flushbuf(vp, MNT_WAIT, td);
578 fuse_filehandle_close(vp, type, td, NULL);
582 if ((fvdat->flag & FN_REVOKED) != 0 && fuse_reclaim_revoked) {
589 struct vnop_link_args {
590 struct vnode *a_tdvp;
592 struct componentname *a_cnp;
596 fuse_vnop_link(struct vop_link_args *ap)
598 struct vnode *vp = ap->a_vp;
599 struct vnode *tdvp = ap->a_tdvp;
600 struct componentname *cnp = ap->a_cnp;
602 struct vattr *vap = VTOVA(vp);
604 struct fuse_dispatcher fdi;
605 struct fuse_entry_out *feo;
606 struct fuse_link_in fli;
610 fuse_trace_printf_vnop();
612 if (fuse_isdeadfs(vp)) {
615 if (vnode_mount(tdvp) != vnode_mount(vp)) {
618 if (vap->va_nlink >= FUSE_LINK_MAX) {
621 fli.oldnodeid = VTOI(vp);
624 fuse_internal_newentry_makerequest(vnode_mount(tdvp), VTOI(tdvp), cnp,
625 FUSE_LINK, &fli, sizeof(fli), &fdi);
626 if ((err = fdisp_wait_answ(&fdi))) {
631 err = fuse_internal_checkentry(feo, vnode_vtype(vp));
638 struct vnop_lookup_args {
639 struct vnodeop_desc *a_desc;
641 struct vnode **a_vpp;
642 struct componentname *a_cnp;
646 fuse_vnop_lookup(struct vop_lookup_args *ap)
648 struct vnode *dvp = ap->a_dvp;
649 struct vnode **vpp = ap->a_vpp;
650 struct componentname *cnp = ap->a_cnp;
651 struct thread *td = cnp->cn_thread;
652 struct ucred *cred = cnp->cn_cred;
654 int nameiop = cnp->cn_nameiop;
655 int flags = cnp->cn_flags;
656 int wantparent = flags & (LOCKPARENT | WANTPARENT);
657 int islastcn = flags & ISLASTCN;
658 struct mount *mp = vnode_mount(dvp);
662 struct vnode *vp = NULL;
664 struct fuse_dispatcher fdi;
668 struct fuse_access_param facp;
670 FS_DEBUG2G("parent_inode=%ju - %*s\n",
671 (uintmax_t)VTOI(dvp), (int)cnp->cn_namelen, cnp->cn_nameptr);
673 if (fuse_isdeadfs(dvp)) {
677 if (!vnode_isdir(dvp)) {
680 if (islastcn && vfs_isrdonly(mp) && (nameiop != LOOKUP)) {
684 * We do access check prior to doing anything else only in the case
685 * when we are at fs root (we'd like to say, "we are at the first
686 * component", but that's not exactly the same... nevermind).
687 * See further comments at further access checks.
690 bzero(&facp, sizeof(facp));
691 if (vnode_isvroot(dvp)) { /* early permission check hack */
692 if ((err = fuse_internal_access(dvp, VEXEC, &facp, td, cred))) {
696 if (flags & ISDOTDOT) {
697 nid = VTOFUD(dvp)->parent_nid;
704 } else if (cnp->cn_namelen == 1 && *(cnp->cn_nameptr) == '.') {
709 } else if (fuse_lookup_cache_enable) {
710 err = cache_lookup(dvp, vpp, cnp, NULL, NULL);
713 case -1: /* positive match */
714 atomic_add_acq_long(&fuse_lookup_cache_hits, 1);
717 case 0: /* no match in cache */
718 atomic_add_acq_long(&fuse_lookup_cache_misses, 1);
721 case ENOENT: /* negative match */
728 fdisp_init(&fdi, cnp->cn_namelen + 1);
732 fdisp_make(&fdi, op, mp, nid, td, cred);
734 if (op == FUSE_LOOKUP) {
735 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
736 ((char *)fdi.indata)[cnp->cn_namelen] = '\0';
738 lookup_err = fdisp_wait_answ(&fdi);
740 if ((op == FUSE_LOOKUP) && !lookup_err) { /* lookup call succeeded */
741 nid = ((struct fuse_entry_out *)fdi.answ)->nodeid;
744 * zero nodeid is the same as "not found",
745 * but it's also cacheable (which we keep
746 * keep on doing not as of writing this)
749 } else if (nid == FUSE_ROOT_ID) {
754 (!fdi.answ_stat || lookup_err != ENOENT || op != FUSE_LOOKUP)) {
758 /* lookup_err, if non-zero, must be ENOENT at this point */
762 if ((nameiop == CREATE || nameiop == RENAME) && islastcn
763 /* && directory dvp has not been removed */ ) {
765 if (vfs_isrdonly(mp)) {
769 #if 0 /* THINK_ABOUT_THIS */
770 if ((err = fuse_internal_access(dvp, VWRITE, cred, td, &facp))) {
776 * Possibly record the position of a slot in the
777 * directory large enough for the new component name.
778 * This can be recorded in the vnode private data for
779 * dvp. Set the SAVENAME flag to hold onto the
780 * pathname for use later in VOP_CREATE or VOP_RENAME.
782 cnp->cn_flags |= SAVENAME;
787 /* Consider inserting name into cache. */
790 * No we can't use negative caching, as the fs
791 * changes are out of our control.
792 * False positives' falseness turns out just as things
793 * go by, but false negatives' falseness doesn't.
794 * (and aiding the caching mechanism with extra control
795 * mechanisms comes quite close to beating the whole purpose
799 if ((cnp->cn_flags & MAKEENTRY) != 0) {
800 FS_DEBUG("inserting NULL into cache\n");
801 cache_enter(dvp, NULL, cnp);
811 struct fuse_entry_out *feo = NULL;
812 struct fuse_attr *fattr = NULL;
814 if (op == FUSE_GETATTR) {
815 fattr = &((struct fuse_attr_out *)fdi.answ)->attr;
817 feo = (struct fuse_entry_out *)fdi.answ;
818 fattr = &(feo->attr);
822 * If deleting, and at end of pathname, return parameters
823 * which can be used to remove file. If the wantparent flag
824 * isn't set, we return only the directory, otherwise we go on
825 * and lock the inode, being careful with ".".
827 if (nameiop == DELETE && islastcn) {
829 * Check for write access on directory.
831 facp.xuid = fattr->uid;
832 facp.facc_flags |= FACCESS_STICKY;
833 err = fuse_internal_access(dvp, VWRITE, &facp, td, cred);
834 facp.facc_flags &= ~FACCESS_XQUERIES;
839 if (nid == VTOI(dvp)) {
843 err = fuse_vnode_get(dvp->v_mount, nid, dvp,
844 &vp, cnp, IFTOVT(fattr->mode));
851 * Save the name for use in VOP_RMDIR and VOP_REMOVE
854 cnp->cn_flags |= SAVENAME;
859 * If rewriting (RENAME), return the inode and the
860 * information required to rewrite the present directory
861 * Must get inode of directory entry to verify it's a
862 * regular file, or empty directory.
864 if (nameiop == RENAME && wantparent && islastcn) {
866 #if 0 /* THINK_ABOUT_THIS */
867 if ((err = fuse_internal_access(dvp, VWRITE, cred, td, &facp))) {
875 if (nid == VTOI(dvp)) {
879 err = fuse_vnode_get(vnode_mount(dvp),
884 IFTOVT(fattr->mode));
890 * Save the name for use in VOP_RENAME later.
892 cnp->cn_flags |= SAVENAME;
896 if (flags & ISDOTDOT) {
901 * Expanded copy of vn_vget_ino() so that
902 * fuse_vnode_get() can be used.
905 ltype = VOP_ISLOCKED(dvp);
906 err = vfs_busy(mp, MBF_NOWAIT);
910 err = vfs_busy(mp, 0);
911 vn_lock(dvp, ltype | LK_RETRY);
915 if ((dvp->v_iflag & VI_DOOMED) != 0) {
922 err = fuse_vnode_get(vnode_mount(dvp),
927 IFTOVT(fattr->mode));
929 vn_lock(dvp, ltype | LK_RETRY);
930 if ((dvp->v_iflag & VI_DOOMED) != 0) {
938 } else if (nid == VTOI(dvp)) {
942 err = fuse_vnode_get(vnode_mount(dvp),
947 IFTOVT(fattr->mode));
951 fuse_vnode_setparent(vp, dvp);
955 if (op == FUSE_GETATTR) {
956 cache_attrs(*vpp, (struct fuse_attr_out *)fdi.answ);
958 cache_attrs(*vpp, (struct fuse_entry_out *)fdi.answ);
961 /* Insert name into cache if appropriate. */
964 * Nooo, caching is evil. With caching, we can't avoid stale
965 * information taking over the playground (cached info is not
966 * just positive/negative, it does have qualitative aspects,
967 * too). And a (VOP/FUSE)_GETATTR is always thrown anyway, when
968 * walking down along cached path components, and that's not
969 * any cheaper than FUSE_LOOKUP. This might change with
970 * implementing kernel side attr caching, but... In Linux,
971 * lookup results are not cached, and the daemon is bombarded
972 * with FUSE_LOOKUPS on and on. This shows that by design, the
973 * daemon is expected to handle frequent lookup queries
974 * efficiently, do its caching in userspace, and so on.
976 * So just leave the name cache alone.
980 * Well, now I know, Linux caches lookups, but with a
981 * timeout... So it's the same thing as attribute caching:
982 * we can deal with it when implement timeouts.
985 if (cnp->cn_flags & MAKEENTRY) {
986 cache_enter(dvp, *vpp, cnp);
993 /* No lookup error; need to clean up. */
995 if (err) { /* Found inode; exit with no vnode. */
996 if (op == FUSE_LOOKUP) {
997 fuse_internal_forget_send(vnode_mount(dvp), td, cred,
1000 fdisp_destroy(&fdi);
1003 #ifndef NO_EARLY_PERM_CHECK_HACK
1006 * We have the attributes of the next item
1007 * *now*, and it's a fact, and we do not
1008 * have to do extra work for it (ie, beg the
1009 * daemon), and it neither depends on such
1010 * accidental things like attr caching. So
1011 * the big idea: check credentials *now*,
1012 * not at the beginning of the next call to
1015 * The first item of the lookup chain (fs root)
1016 * won't be checked then here, of course, as
1017 * its never "the next". But go and see that
1018 * the root is taken care about at the very
1019 * beginning of this function.
1021 * Now, given we want to do the access check
1022 * this way, one might ask: so then why not
1023 * do the access check just after fetching
1024 * the inode and its attributes from the
1025 * daemon? Why bother with producing the
1026 * corresponding vnode at all if something
1027 * is not OK? We know what's the deal as
1028 * soon as we get those attrs... There is
1029 * one bit of info though not given us by
1030 * the daemon: whether his response is
1031 * authoritative or not... His response should
1032 * be ignored if something is mounted over
1033 * the dir in question. But that can be
1034 * known only by having the vnode...
1036 int tmpvtype = vnode_vtype(*vpp);
1038 bzero(&facp, sizeof(facp));
1039 /*the early perm check hack */
1040 facp.facc_flags |= FACCESS_VA_VALID;
1042 if ((tmpvtype != VDIR) && (tmpvtype != VLNK)) {
1045 if (!err && !vnode_mountedhere(*vpp)) {
1046 err = fuse_internal_access(*vpp, VEXEC, &facp, td, cred);
1049 if (tmpvtype == VLNK)
1050 FS_DEBUG("weird, permission error with a symlink?\n");
1058 fdisp_destroy(&fdi);
1064 struct vnop_mkdir_args {
1065 struct vnode *a_dvp;
1066 struct vnode **a_vpp;
1067 struct componentname *a_cnp;
1068 struct vattr *a_vap;
1072 fuse_vnop_mkdir(struct vop_mkdir_args *ap)
1074 struct vnode *dvp = ap->a_dvp;
1075 struct vnode **vpp = ap->a_vpp;
1076 struct componentname *cnp = ap->a_cnp;
1077 struct vattr *vap = ap->a_vap;
1079 struct fuse_mkdir_in fmdi;
1081 fuse_trace_printf_vnop();
1083 if (fuse_isdeadfs(dvp)) {
1086 fmdi.mode = MAKEIMODE(vap->va_type, vap->va_mode);
1088 return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKDIR, &fmdi,
1089 sizeof(fmdi), VDIR));
1093 struct vnop_mknod_args {
1094 struct vnode *a_dvp;
1095 struct vnode **a_vpp;
1096 struct componentname *a_cnp;
1097 struct vattr *a_vap;
1101 fuse_vnop_mknod(struct vop_mknod_args *ap)
1109 struct vnop_open_args {
1112 struct ucred *a_cred;
1113 struct thread *a_td;
1114 int a_fdidx; / struct file *a_fp;
1118 fuse_vnop_open(struct vop_open_args *ap)
1120 struct vnode *vp = ap->a_vp;
1121 int mode = ap->a_mode;
1122 struct thread *td = ap->a_td;
1123 struct ucred *cred = ap->a_cred;
1125 fufh_type_t fufh_type;
1126 struct fuse_vnode_data *fvdat;
1128 int error, isdir = 0;
1129 int32_t fuse_open_flags;
1131 FS_DEBUG2G("inode=%ju mode=0x%x\n", (uintmax_t)VTOI(vp), mode);
1133 if (fuse_isdeadfs(vp)) {
1138 if (vnode_isdir(vp)) {
1141 fuse_open_flags = 0;
1143 fufh_type = FUFH_RDONLY;
1145 fufh_type = fuse_filehandle_xlate_from_fflags(mode);
1147 * For WRONLY opens, force DIRECT_IO. This is necessary
1148 * since writing a partial block through the buffer cache
1149 * will result in a read of the block and that read won't
1150 * be allowed by the WRONLY open.
1152 if (fufh_type == FUFH_WRONLY ||
1153 (fvdat->flag & FN_DIRECTIO) != 0)
1154 fuse_open_flags = FOPEN_DIRECT_IO;
1157 if (fuse_filehandle_validrw(vp, fufh_type) != FUFH_INVALID) {
1158 fuse_vnode_open(vp, fuse_open_flags, td);
1161 error = fuse_filehandle_open(vp, fufh_type, NULL, td, cred);
1167 struct vnop_read_args {
1171 struct ucred *a_cred;
1175 fuse_vnop_read(struct vop_read_args *ap)
1177 struct vnode *vp = ap->a_vp;
1178 struct uio *uio = ap->a_uio;
1179 int ioflag = ap->a_ioflag;
1180 struct ucred *cred = ap->a_cred;
1182 FS_DEBUG2G("inode=%ju offset=%jd resid=%zd\n",
1183 (uintmax_t)VTOI(vp), uio->uio_offset, uio->uio_resid);
1185 if (fuse_isdeadfs(vp)) {
1189 if (VTOFUD(vp)->flag & FN_DIRECTIO) {
1190 ioflag |= IO_DIRECT;
1193 return fuse_io_dispatch(vp, uio, ioflag, cred);
1197 struct vnop_readdir_args {
1200 struct ucred *a_cred;
1207 fuse_vnop_readdir(struct vop_readdir_args *ap)
1209 struct vnode *vp = ap->a_vp;
1210 struct uio *uio = ap->a_uio;
1211 struct ucred *cred = ap->a_cred;
1213 struct fuse_filehandle *fufh = NULL;
1214 struct fuse_vnode_data *fvdat;
1215 struct fuse_iov cookediov;
1220 FS_DEBUG2G("inode=%ju\n", (uintmax_t)VTOI(vp));
1222 if (fuse_isdeadfs(vp)) {
1225 if ( /* XXXIP ((uio_iovcnt(uio) > 1)) || */
1226 (uio_resid(uio) < sizeof(struct dirent))) {
1231 if (!fuse_filehandle_valid(vp, FUFH_RDONLY)) {
1232 FS_DEBUG("calling readdir() before open()");
1233 err = fuse_filehandle_open(vp, FUFH_RDONLY, &fufh, NULL, cred);
1236 err = fuse_filehandle_get(vp, FUFH_RDONLY, &fufh);
1241 #define DIRCOOKEDSIZE FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + MAXNAMLEN + 1)
1242 fiov_init(&cookediov, DIRCOOKEDSIZE);
1244 err = fuse_internal_readdir(vp, uio, fufh, &cookediov);
1246 fiov_teardown(&cookediov);
1248 fuse_filehandle_close(vp, FUFH_RDONLY, NULL, cred);
1254 struct vnop_readlink_args {
1257 struct ucred *a_cred;
1261 fuse_vnop_readlink(struct vop_readlink_args *ap)
1263 struct vnode *vp = ap->a_vp;
1264 struct uio *uio = ap->a_uio;
1265 struct ucred *cred = ap->a_cred;
1267 struct fuse_dispatcher fdi;
1270 FS_DEBUG2G("inode=%ju\n", (uintmax_t)VTOI(vp));
1272 if (fuse_isdeadfs(vp)) {
1275 if (!vnode_islnk(vp)) {
1278 fdisp_init(&fdi, 0);
1279 err = fdisp_simple_putget_vp(&fdi, FUSE_READLINK, vp, curthread, cred);
1283 if (((char *)fdi.answ)[0] == '/' &&
1284 fuse_get_mpdata(vnode_mount(vp))->dataflags & FSESS_PUSH_SYMLINKS_IN) {
1285 char *mpth = vnode_mount(vp)->mnt_stat.f_mntonname;
1287 err = uiomove(mpth, strlen(mpth), uio);
1290 err = uiomove(fdi.answ, fdi.iosize, uio);
1293 fdisp_destroy(&fdi);
1298 struct vnop_reclaim_args {
1300 struct thread *a_td;
1304 fuse_vnop_reclaim(struct vop_reclaim_args *ap)
1306 struct vnode *vp = ap->a_vp;
1307 struct thread *td = ap->a_td;
1309 struct fuse_vnode_data *fvdat = VTOFUD(vp);
1310 struct fuse_filehandle *fufh = NULL;
1315 panic("FUSE: no vnode data during recycling");
1317 FS_DEBUG("inode=%ju\n", (uintmax_t)VTOI(vp));
1319 for (type = 0; type < FUFH_MAXTYPE; type++) {
1320 fufh = &(fvdat->fufh[type]);
1321 if (FUFH_IS_VALID(fufh)) {
1322 printf("FUSE: vnode being reclaimed but fufh (type=%d) is valid",
1324 fuse_filehandle_close(vp, type, td, NULL);
1328 if ((!fuse_isdeadfs(vp)) && (fvdat->nlookup)) {
1329 fuse_internal_forget_send(vnode_mount(vp), td, NULL, VTOI(vp),
1332 fuse_vnode_setparent(vp, NULL);
1334 vfs_hash_remove(vp);
1335 vnode_destroy_vobject(vp);
1336 fuse_vnode_destroy(vp);
1342 struct vnop_remove_args {
1343 struct vnode *a_dvp;
1345 struct componentname *a_cnp;
1349 fuse_vnop_remove(struct vop_remove_args *ap)
1351 struct vnode *dvp = ap->a_dvp;
1352 struct vnode *vp = ap->a_vp;
1353 struct componentname *cnp = ap->a_cnp;
1357 FS_DEBUG2G("inode=%ju name=%*s\n",
1358 (uintmax_t)VTOI(vp), (int)cnp->cn_namelen, cnp->cn_nameptr);
1360 if (fuse_isdeadfs(vp)) {
1363 if (vnode_isdir(vp)) {
1368 err = fuse_internal_remove(dvp, vp, cnp, FUSE_UNLINK);
1371 fuse_internal_vnode_disappear(vp);
1376 struct vnop_rename_args {
1377 struct vnode *a_fdvp;
1378 struct vnode *a_fvp;
1379 struct componentname *a_fcnp;
1380 struct vnode *a_tdvp;
1381 struct vnode *a_tvp;
1382 struct componentname *a_tcnp;
1386 fuse_vnop_rename(struct vop_rename_args *ap)
1388 struct vnode *fdvp = ap->a_fdvp;
1389 struct vnode *fvp = ap->a_fvp;
1390 struct componentname *fcnp = ap->a_fcnp;
1391 struct vnode *tdvp = ap->a_tdvp;
1392 struct vnode *tvp = ap->a_tvp;
1393 struct componentname *tcnp = ap->a_tcnp;
1394 struct fuse_data *data;
1398 FS_DEBUG2G("from: inode=%ju name=%*s -> to: inode=%ju name=%*s\n",
1399 (uintmax_t)VTOI(fvp), (int)fcnp->cn_namelen, fcnp->cn_nameptr,
1400 (uintmax_t)(tvp == NULL ? -1 : VTOI(tvp)),
1401 (int)tcnp->cn_namelen, tcnp->cn_nameptr);
1403 if (fuse_isdeadfs(fdvp)) {
1406 if (fvp->v_mount != tdvp->v_mount ||
1407 (tvp && fvp->v_mount != tvp->v_mount)) {
1408 FS_DEBUG("cross-device rename: %s -> %s\n",
1409 fcnp->cn_nameptr, (tcnp != NULL ? tcnp->cn_nameptr : "(NULL)"));
1416 * FUSE library is expected to check if target directory is not
1417 * under the source directory in the file system tree.
1418 * Linux performs this check at VFS level.
1420 data = fuse_get_mpdata(vnode_mount(tdvp));
1421 sx_xlock(&data->rename_lock);
1422 err = fuse_internal_rename(fdvp, fcnp, tdvp, tcnp);
1425 fuse_vnode_setparent(fvp, tdvp);
1427 fuse_vnode_setparent(tvp, NULL);
1429 sx_unlock(&data->rename_lock);
1431 if (tvp != NULL && tvp != fvp) {
1434 if (vnode_isdir(fvp)) {
1435 if ((tvp != NULL) && vnode_isdir(tvp)) {
1456 struct vnop_rmdir_args {
1457 struct vnode *a_dvp;
1459 struct componentname *a_cnp;
1463 fuse_vnop_rmdir(struct vop_rmdir_args *ap)
1465 struct vnode *dvp = ap->a_dvp;
1466 struct vnode *vp = ap->a_vp;
1470 FS_DEBUG2G("inode=%ju\n", (uintmax_t)VTOI(vp));
1472 if (fuse_isdeadfs(vp)) {
1475 if (VTOFUD(vp) == VTOFUD(dvp)) {
1478 err = fuse_internal_remove(dvp, vp, ap->a_cnp, FUSE_RMDIR);
1481 fuse_internal_vnode_disappear(vp);
1486 struct vnop_setattr_args {
1488 struct vattr *a_vap;
1489 struct ucred *a_cred;
1490 struct thread *a_td;
1494 fuse_vnop_setattr(struct vop_setattr_args *ap)
1496 struct vnode *vp = ap->a_vp;
1497 struct vattr *vap = ap->a_vap;
1498 struct ucred *cred = ap->a_cred;
1499 struct thread *td = curthread;
1501 struct fuse_dispatcher fdi;
1502 struct fuse_setattr_in *fsai;
1503 struct fuse_access_param facp;
1507 int sizechanged = 0;
1508 uint64_t newsize = 0;
1510 FS_DEBUG2G("inode=%ju\n", (uintmax_t)VTOI(vp));
1512 if (fuse_isdeadfs(vp)) {
1515 fdisp_init(&fdi, sizeof(*fsai));
1516 fdisp_make_vp(&fdi, FUSE_SETATTR, vp, td, cred);
1520 bzero(&facp, sizeof(facp));
1522 facp.xuid = vap->va_uid;
1523 facp.xgid = vap->va_gid;
1525 if (vap->va_uid != (uid_t)VNOVAL) {
1526 facp.facc_flags |= FACCESS_CHOWN;
1527 fsai->uid = vap->va_uid;
1528 fsai->valid |= FATTR_UID;
1530 if (vap->va_gid != (gid_t)VNOVAL) {
1531 facp.facc_flags |= FACCESS_CHOWN;
1532 fsai->gid = vap->va_gid;
1533 fsai->valid |= FATTR_GID;
1535 if (vap->va_size != VNOVAL) {
1537 struct fuse_filehandle *fufh = NULL;
1539 /*Truncate to a new value. */
1540 fsai->size = vap->va_size;
1542 newsize = vap->va_size;
1543 fsai->valid |= FATTR_SIZE;
1545 fuse_filehandle_getrw(vp, FUFH_WRONLY, &fufh);
1547 fsai->fh = fufh->fh_id;
1548 fsai->valid |= FATTR_FH;
1551 if (vap->va_atime.tv_sec != VNOVAL) {
1552 fsai->atime = vap->va_atime.tv_sec;
1553 fsai->atimensec = vap->va_atime.tv_nsec;
1554 fsai->valid |= FATTR_ATIME;
1556 if (vap->va_mtime.tv_sec != VNOVAL) {
1557 fsai->mtime = vap->va_mtime.tv_sec;
1558 fsai->mtimensec = vap->va_mtime.tv_nsec;
1559 fsai->valid |= FATTR_MTIME;
1561 if (vap->va_mode != (mode_t)VNOVAL) {
1562 fsai->mode = vap->va_mode & ALLPERMS;
1563 fsai->valid |= FATTR_MODE;
1568 vtyp = vnode_vtype(vp);
1570 if (fsai->valid & FATTR_SIZE && vtyp == VDIR) {
1574 if (vfs_isrdonly(vnode_mount(vp)) && (fsai->valid & ~FATTR_SIZE || vtyp == VREG)) {
1578 if (fsai->valid & ~FATTR_SIZE) {
1579 /*err = fuse_internal_access(vp, VADMIN, context, &facp); */
1583 facp.facc_flags &= ~FACCESS_XQUERIES;
1585 if (err && !(fsai->valid & ~(FATTR_ATIME | FATTR_MTIME)) &&
1586 vap->va_vaflags & VA_UTIMES_NULL) {
1587 err = fuse_internal_access(vp, VWRITE, &facp, td, cred);
1591 if ((err = fdisp_wait_answ(&fdi)))
1593 vtyp = IFTOVT(((struct fuse_attr_out *)fdi.answ)->attr.mode);
1595 if (vnode_vtype(vp) != vtyp) {
1596 if (vnode_vtype(vp) == VNON && vtyp != VNON) {
1597 debug_printf("FUSE: Dang! vnode_vtype is VNON and vtype isn't.\n");
1600 * STALE vnode, ditch
1602 * The vnode has changed its type "behind our back". There's
1603 * nothing really we can do, so let us just force an internal
1604 * revocation and tell the caller to try again, if interested.
1606 fuse_internal_vnode_disappear(vp);
1610 if (!err && !sizechanged) {
1611 cache_attrs(vp, (struct fuse_attr_out *)fdi.answ);
1614 fdisp_destroy(&fdi);
1615 if (!err && sizechanged) {
1616 fuse_vnode_setsize(vp, cred, newsize);
1617 VTOFUD(vp)->flag &= ~FN_SIZECHANGE;
1623 struct vnop_strategy_args {
1629 fuse_vnop_strategy(struct vop_strategy_args *ap)
1631 struct vnode *vp = ap->a_vp;
1632 struct buf *bp = ap->a_bp;
1634 fuse_trace_printf_vnop();
1636 if (!vp || fuse_isdeadfs(vp)) {
1637 bp->b_ioflags |= BIO_ERROR;
1638 bp->b_error = ENXIO;
1642 if (bp->b_iocmd == BIO_WRITE)
1643 fuse_vnode_refreshsize(vp, NOCRED);
1645 (void)fuse_io_strategy(vp, bp);
1648 * This is a dangerous function. If returns error, that might mean a
1649 * panic. We prefer pretty much anything over being forced to panic
1650 * by a malicious daemon (a demon?). So we just return 0 anyway. You
1651 * should never mind this: this function has its own error
1652 * propagation mechanism via the argument buffer, so
1653 * not-that-melodramatic residents of the call chain still will be
1654 * able to know what to do.
1661 struct vnop_symlink_args {
1662 struct vnode *a_dvp;
1663 struct vnode **a_vpp;
1664 struct componentname *a_cnp;
1665 struct vattr *a_vap;
1670 fuse_vnop_symlink(struct vop_symlink_args *ap)
1672 struct vnode *dvp = ap->a_dvp;
1673 struct vnode **vpp = ap->a_vpp;
1674 struct componentname *cnp = ap->a_cnp;
1675 char *target = ap->a_target;
1677 struct fuse_dispatcher fdi;
1682 FS_DEBUG2G("inode=%ju name=%*s\n",
1683 (uintmax_t)VTOI(dvp), (int)cnp->cn_namelen, cnp->cn_nameptr);
1685 if (fuse_isdeadfs(dvp)) {
1689 * Unlike the other creator type calls, here we have to create a message
1690 * where the name of the new entry comes first, and the data describing
1691 * the entry comes second.
1692 * Hence we can't rely on our handy fuse_internal_newentry() routine,
1693 * but put together the message manually and just call the core part.
1696 len = strlen(target) + 1;
1697 fdisp_init(&fdi, len + cnp->cn_namelen + 1);
1698 fdisp_make_vp(&fdi, FUSE_SYMLINK, dvp, curthread, NULL);
1700 memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
1701 ((char *)fdi.indata)[cnp->cn_namelen] = '\0';
1702 memcpy((char *)fdi.indata + cnp->cn_namelen + 1, target, len);
1704 err = fuse_internal_newentry_core(dvp, vpp, cnp, VLNK, &fdi);
1705 fdisp_destroy(&fdi);
1710 struct vnop_write_args {
1714 struct ucred *a_cred;
1718 fuse_vnop_write(struct vop_write_args *ap)
1720 struct vnode *vp = ap->a_vp;
1721 struct uio *uio = ap->a_uio;
1722 int ioflag = ap->a_ioflag;
1723 struct ucred *cred = ap->a_cred;
1725 fuse_trace_printf_vnop();
1727 if (fuse_isdeadfs(vp)) {
1730 fuse_vnode_refreshsize(vp, cred);
1732 if (VTOFUD(vp)->flag & FN_DIRECTIO) {
1733 ioflag |= IO_DIRECT;
1736 return fuse_io_dispatch(vp, uio, ioflag, cred);
1740 struct vnop_getpages_args {
1748 fuse_vnop_getpages(struct vop_getpages_args *ap)
1750 int i, error, nextoff, size, toff, count, npages;
1760 FS_DEBUG2G("heh\n");
1763 KASSERT(vp->v_object, ("objectless vp passed to getpages"));
1764 td = curthread; /* XXX */
1765 cred = curthread->td_ucred; /* XXX */
1767 npages = ap->a_count;
1769 if (!fsess_opt_mmap(vnode_mount(vp))) {
1770 FS_DEBUG("called on non-cacheable vnode??\n");
1771 return (VM_PAGER_ERROR);
1775 * If the last page is partially valid, just return it and allow
1776 * the pager to zero-out the blanks. Partially valid pages can
1777 * only occur at the file EOF.
1779 * XXXGL: is that true for FUSE, which is a local filesystem,
1780 * but still somewhat disconnected from the kernel?
1782 VM_OBJECT_WLOCK(vp->v_object);
1783 if (pages[npages - 1]->valid != 0 && --npages == 0)
1785 VM_OBJECT_WUNLOCK(vp->v_object);
1788 * We use only the kva address for the buffer, but this is extremely
1789 * convenient and fast.
1791 bp = getpbuf(&fuse_pbuf_freecnt);
1793 kva = (vm_offset_t)bp->b_data;
1794 pmap_qenter(kva, pages, npages);
1795 PCPU_INC(cnt.v_vnodein);
1796 PCPU_ADD(cnt.v_vnodepgsin, npages);
1798 count = npages << PAGE_SHIFT;
1799 iov.iov_base = (caddr_t)kva;
1800 iov.iov_len = count;
1803 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
1804 uio.uio_resid = count;
1805 uio.uio_segflg = UIO_SYSSPACE;
1806 uio.uio_rw = UIO_READ;
1809 error = fuse_io_dispatch(vp, &uio, IO_DIRECT, cred);
1810 pmap_qremove(kva, npages);
1812 relpbuf(bp, &fuse_pbuf_freecnt);
1814 if (error && (uio.uio_resid == count)) {
1815 FS_DEBUG("error %d\n", error);
1816 return VM_PAGER_ERROR;
1819 * Calculate the number of bytes read and validate only that number
1820 * of bytes. Note that due to pending writes, size may be 0. This
1821 * does not mean that the remaining data is invalid!
1824 size = count - uio.uio_resid;
1825 VM_OBJECT_WLOCK(vp->v_object);
1826 fuse_vm_page_lock_queues();
1827 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
1830 nextoff = toff + PAGE_SIZE;
1833 if (nextoff <= size) {
1835 * Read operation filled an entire page
1837 m->valid = VM_PAGE_BITS_ALL;
1838 KASSERT(m->dirty == 0,
1839 ("fuse_getpages: page %p is dirty", m));
1840 } else if (size > toff) {
1842 * Read operation filled a partial page.
1845 vm_page_set_valid_range(m, 0, size - toff);
1846 KASSERT(m->dirty == 0,
1847 ("fuse_getpages: page %p is dirty", m));
1850 * Read operation was short. If no error occurred
1851 * we may have hit a zero-fill section. We simply
1852 * leave valid set to 0.
1857 fuse_vm_page_unlock_queues();
1859 VM_OBJECT_WUNLOCK(vp->v_object);
1864 return (VM_PAGER_OK);
1868 struct vnop_putpages_args {
1874 vm_ooffset_t a_offset;
1878 fuse_vnop_putpages(struct vop_putpages_args *ap)
1884 int i, error, npages, count;
1893 FS_DEBUG2G("heh\n");
1896 KASSERT(vp->v_object, ("objectless vp passed to putpages"));
1897 fsize = vp->v_object->un_pager.vnp.vnp_size;
1898 td = curthread; /* XXX */
1899 cred = curthread->td_ucred; /* XXX */
1901 count = ap->a_count;
1902 rtvals = ap->a_rtvals;
1903 npages = btoc(count);
1904 offset = IDX_TO_OFF(pages[0]->pindex);
1906 if (!fsess_opt_mmap(vnode_mount(vp))) {
1907 FS_DEBUG("called on non-cacheable vnode??\n");
1909 for (i = 0; i < npages; i++)
1910 rtvals[i] = VM_PAGER_AGAIN;
1913 * When putting pages, do not extend file past EOF.
1916 if (offset + count > fsize) {
1917 count = fsize - offset;
1922 * We use only the kva address for the buffer, but this is extremely
1923 * convenient and fast.
1925 bp = getpbuf(&fuse_pbuf_freecnt);
1927 kva = (vm_offset_t)bp->b_data;
1928 pmap_qenter(kva, pages, npages);
1929 PCPU_INC(cnt.v_vnodeout);
1930 PCPU_ADD(cnt.v_vnodepgsout, count);
1932 iov.iov_base = (caddr_t)kva;
1933 iov.iov_len = count;
1936 uio.uio_offset = offset;
1937 uio.uio_resid = count;
1938 uio.uio_segflg = UIO_SYSSPACE;
1939 uio.uio_rw = UIO_WRITE;
1942 error = fuse_io_dispatch(vp, &uio, IO_DIRECT, cred);
1944 pmap_qremove(kva, npages);
1945 relpbuf(bp, &fuse_pbuf_freecnt);
1948 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE;
1950 for (i = 0; i < nwritten; i++) {
1951 rtvals[i] = VM_PAGER_OK;
1952 VM_OBJECT_WLOCK(pages[i]->object);
1953 vm_page_undirty(pages[i]);
1954 VM_OBJECT_WUNLOCK(pages[i]->object);
1961 struct vnop_print_args {
1966 fuse_vnop_print(struct vop_print_args *ap)
1968 struct fuse_vnode_data *fvdat = VTOFUD(ap->a_vp);
1970 printf("nodeid: %ju, parent nodeid: %ju, nlookup: %ju, flag: %#x\n",
1971 (uintmax_t)VTOILLU(ap->a_vp), (uintmax_t)fvdat->parent_nid,
1972 (uintmax_t)fvdat->nlookup,