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 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
45 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 #include <sys/cdefs.h>
59 __FBSDID("$FreeBSD$");
61 #include <sys/types.h>
62 #include <sys/module.h>
63 #include <sys/systm.h>
64 #include <sys/errno.h>
65 #include <sys/param.h>
66 #include <sys/kernel.h>
69 #include <sys/malloc.h>
70 #include <sys/queue.h>
73 #include <sys/mutex.h>
75 #include <sys/mount.h>
76 #include <sys/vnode.h>
77 #include <sys/sysctl.h>
80 #include "fuse_file.h"
81 #include "fuse_internal.h"
83 #include "fuse_node.h"
85 #define FUSE_DEBUG_MODULE FILE
86 #include "fuse_debug.h"
88 static int fuse_fh_count = 0;
90 SYSCTL_INT(_vfs_fuse, OID_AUTO, filehandle_count, CTLFLAG_RD,
91 &fuse_fh_count, 0, "number of open FUSE filehandles");
94 fuse_filehandle_open(struct vnode *vp, fufh_type_t fufh_type,
95 struct fuse_filehandle **fufhp, struct thread *td, struct ucred *cred)
97 struct fuse_dispatcher fdi;
98 struct fuse_open_in *foi;
99 struct fuse_open_out *foo;
105 fuse_trace_printf("fuse_filehandle_open(vp=%p, fufh_type=%d)\n",
108 if (fuse_filehandle_valid(vp, fufh_type)) {
109 panic("FUSE: filehandle_open called despite valid fufh (type=%d)",
114 * Note that this means we are effectively FILTERING OUT open() flags.
116 oflags = fuse_filehandle_xlate_to_oflags(fufh_type);
118 if (vnode_isdir(vp)) {
120 if (fufh_type != FUFH_RDONLY) {
121 printf("FUSE:non-rdonly fh requested for a directory?\n");
122 fufh_type = FUFH_RDONLY;
125 fdisp_init(&fdi, sizeof(*foi));
126 fdisp_make_vp(&fdi, op, vp, td, cred);
131 if ((err = fdisp_wait_answ(&fdi))) {
132 debug_printf("OUCH ... daemon didn't give fh (err = %d)\n", err);
134 fuse_internal_vnode_disappear(vp);
140 fuse_filehandle_init(vp, fufh_type, fufhp, foo->fh);
143 * For WRONLY opens, force DIRECT_IO. This is necessary
144 * since writing a partial block through the buffer cache
145 * will result in a read of the block and that read won't
146 * be allowed by the WRONLY open.
148 if (fufh_type == FUFH_WRONLY)
149 fuse_vnode_open(vp, foo->open_flags | FOPEN_DIRECT_IO, td);
151 fuse_vnode_open(vp, foo->open_flags, td);
159 fuse_filehandle_close(struct vnode *vp, fufh_type_t fufh_type,
160 struct thread *td, struct ucred *cred)
162 struct fuse_dispatcher fdi;
163 struct fuse_release_in *fri;
164 struct fuse_vnode_data *fvdat = VTOFUD(vp);
165 struct fuse_filehandle *fufh = NULL;
168 int op = FUSE_RELEASE;
170 fuse_trace_printf("fuse_filehandle_put(vp=%p, fufh_type=%d)\n",
173 fufh = &(fvdat->fufh[fufh_type]);
174 if (!FUFH_IS_VALID(fufh)) {
175 panic("FUSE: filehandle_put called on invalid fufh (type=%d)",
179 if (fuse_isdeadfs(vp)) {
183 op = FUSE_RELEASEDIR;
184 fdisp_init(&fdi, sizeof(*fri));
185 fdisp_make_vp(&fdi, op, vp, td, cred);
187 fri->fh = fufh->fh_id;
188 fri->flags = fuse_filehandle_xlate_to_oflags(fufh_type);
190 err = fdisp_wait_answ(&fdi);
194 atomic_subtract_acq_int(&fuse_fh_count, 1);
195 fufh->fh_id = (uint64_t)-1;
196 fufh->fh_type = FUFH_INVALID;
202 fuse_filehandle_valid(struct vnode *vp, fufh_type_t fufh_type)
204 struct fuse_vnode_data *fvdat = VTOFUD(vp);
205 struct fuse_filehandle *fufh;
207 fufh = &(fvdat->fufh[fufh_type]);
208 return FUFH_IS_VALID(fufh);
212 * Check for a valid file handle, first the type requested, but if that
213 * isn't valid, try for FUFH_RDWR.
214 * Return the FUFH type that is valid or FUFH_INVALID if there are none.
215 * This is a variant of fuse_filehandle_vaild() analogous to
216 * fuse_filehandle_getrw().
219 fuse_filehandle_validrw(struct vnode *vp, fufh_type_t fufh_type)
221 struct fuse_vnode_data *fvdat = VTOFUD(vp);
222 struct fuse_filehandle *fufh;
224 fufh = &fvdat->fufh[fufh_type];
225 if (FUFH_IS_VALID(fufh) != 0)
227 fufh = &fvdat->fufh[FUFH_RDWR];
228 if (FUFH_IS_VALID(fufh) != 0)
230 return (FUFH_INVALID);
234 fuse_filehandle_get(struct vnode *vp, fufh_type_t fufh_type,
235 struct fuse_filehandle **fufhp)
237 struct fuse_vnode_data *fvdat = VTOFUD(vp);
238 struct fuse_filehandle *fufh;
240 fufh = &(fvdat->fufh[fufh_type]);
241 if (!FUFH_IS_VALID(fufh))
249 fuse_filehandle_getrw(struct vnode *vp, fufh_type_t fufh_type,
250 struct fuse_filehandle **fufhp)
252 struct fuse_vnode_data *fvdat = VTOFUD(vp);
253 struct fuse_filehandle *fufh;
255 fufh = &(fvdat->fufh[fufh_type]);
256 if (!FUFH_IS_VALID(fufh)) {
257 fufh_type = FUFH_RDWR;
259 return fuse_filehandle_get(vp, fufh_type, fufhp);
263 fuse_filehandle_init(struct vnode *vp, fufh_type_t fufh_type,
264 struct fuse_filehandle **fufhp, uint64_t fh_id)
266 struct fuse_vnode_data *fvdat = VTOFUD(vp);
267 struct fuse_filehandle *fufh;
269 FS_DEBUG("id=%jd type=%d\n", (intmax_t)fh_id, fufh_type);
270 fufh = &(fvdat->fufh[fufh_type]);
271 MPASS(!FUFH_IS_VALID(fufh));
273 fufh->fh_type = fufh_type;
274 if (!FUFH_IS_VALID(fufh)) {
275 panic("FUSE: init: invalid filehandle id (type=%d)", fufh_type);
280 atomic_add_acq_int(&fuse_fh_count, 1);