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>
71 #include <sys/mutex.h>
73 #include <sys/mount.h>
74 #include <sys/vnode.h>
75 #include <sys/sysctl.h>
78 #include "fuse_file.h"
79 #include "fuse_internal.h"
81 #include "fuse_node.h"
83 #define FUSE_DEBUG_MODULE FILE
84 #include "fuse_debug.h"
86 static int fuse_fh_count = 0;
88 SYSCTL_INT(_vfs_fuse, OID_AUTO, filehandle_count, CTLFLAG_RD,
89 &fuse_fh_count, 0, "");
92 fuse_filehandle_open(struct vnode *vp,
93 fufh_type_t fufh_type,
94 struct fuse_filehandle **fufhp,
98 struct fuse_dispatcher fdi;
99 struct fuse_open_in *foi;
100 struct fuse_open_out *foo;
107 fuse_trace_printf("fuse_filehandle_open(vp=%p, fufh_type=%d)\n",
110 if (fuse_filehandle_valid(vp, fufh_type)) {
111 panic("FUSE: filehandle_open called despite valid fufh (type=%d)",
116 * Note that this means we are effectively FILTERING OUT open() flags.
118 oflags = fuse_filehandle_xlate_to_oflags(fufh_type);
120 if (vnode_isdir(vp)) {
123 if (fufh_type != FUFH_RDONLY) {
124 printf("FUSE:non-rdonly fh requested for a directory?\n");
125 fufh_type = FUFH_RDONLY;
128 fdisp_init(&fdi, sizeof(*foi));
129 fdisp_make_vp(&fdi, op, vp, td, cred);
134 if ((err = fdisp_wait_answ(&fdi))) {
135 debug_printf("OUCH ... daemon didn't give fh (err = %d)\n", err);
137 fuse_internal_vnode_disappear(vp);
143 fuse_filehandle_init(vp, fufh_type, fufhp, foo->fh);
146 * For WRONLY opens, force DIRECT_IO. This is necessary
147 * since writing a partial block through the buffer cache
148 * will result in a read of the block and that read won't
149 * be allowed by the WRONLY open.
151 if (fufh_type == FUFH_WRONLY)
152 fuse_vnode_open(vp, foo->open_flags | FOPEN_DIRECT_IO, td);
154 fuse_vnode_open(vp, foo->open_flags, td);
162 fuse_filehandle_close(struct vnode *vp,
163 fufh_type_t fufh_type,
167 struct fuse_dispatcher fdi;
168 struct fuse_release_in *fri;
169 struct fuse_vnode_data *fvdat = VTOFUD(vp);
170 struct fuse_filehandle *fufh = NULL;
174 int op = FUSE_RELEASE;
176 fuse_trace_printf("fuse_filehandle_put(vp=%p, fufh_type=%d)\n",
179 fufh = &(fvdat->fufh[fufh_type]);
180 if (!FUFH_IS_VALID(fufh)) {
181 panic("FUSE: filehandle_put called on invalid fufh (type=%d)",
185 if (fuse_isdeadfs(vp)) {
188 if (vnode_isdir(vp)) {
189 op = FUSE_RELEASEDIR;
192 fdisp_init(&fdi, sizeof(*fri));
193 fdisp_make_vp(&fdi, op, vp, td, cred);
195 fri->fh = fufh->fh_id;
196 fri->flags = fuse_filehandle_xlate_to_oflags(fufh_type);
198 err = fdisp_wait_answ(&fdi);
202 atomic_subtract_acq_int(&fuse_fh_count, 1);
203 fufh->fh_id = (uint64_t)-1;
204 fufh->fh_type = FUFH_INVALID;
210 fuse_filehandle_valid(struct vnode *vp, fufh_type_t fufh_type)
212 struct fuse_vnode_data *fvdat = VTOFUD(vp);
213 struct fuse_filehandle *fufh;
215 fufh = &(fvdat->fufh[fufh_type]);
216 return FUFH_IS_VALID(fufh);
220 * Check for a valid file handle, first the type requested, but if that
221 * isn't valid, try for FUFH_RDWR.
222 * Return the FUFH type that is valid or FUFH_INVALID if there are none.
223 * This is a variant of fuse_filehandle_vaild() analogous to
224 * fuse_filehandle_getrw().
227 fuse_filehandle_validrw(struct vnode *vp, fufh_type_t fufh_type)
229 struct fuse_vnode_data *fvdat = VTOFUD(vp);
230 struct fuse_filehandle *fufh;
232 fufh = &fvdat->fufh[fufh_type];
233 if (FUFH_IS_VALID(fufh) != 0)
235 fufh = &fvdat->fufh[FUFH_RDWR];
236 if (FUFH_IS_VALID(fufh) != 0)
238 return (FUFH_INVALID);
242 fuse_filehandle_get(struct vnode *vp, fufh_type_t fufh_type,
243 struct fuse_filehandle **fufhp)
245 struct fuse_vnode_data *fvdat = VTOFUD(vp);
246 struct fuse_filehandle *fufh;
248 fufh = &(fvdat->fufh[fufh_type]);
249 if (!FUFH_IS_VALID(fufh))
257 fuse_filehandle_getrw(struct vnode *vp, fufh_type_t fufh_type,
258 struct fuse_filehandle **fufhp)
260 struct fuse_vnode_data *fvdat = VTOFUD(vp);
261 struct fuse_filehandle *fufh;
263 fufh = &(fvdat->fufh[fufh_type]);
264 if (!FUFH_IS_VALID(fufh)) {
265 fufh_type = FUFH_RDWR;
267 return fuse_filehandle_get(vp, fufh_type, fufhp);
271 fuse_filehandle_init(struct vnode *vp,
272 fufh_type_t fufh_type,
273 struct fuse_filehandle **fufhp,
276 struct fuse_vnode_data *fvdat = VTOFUD(vp);
277 struct fuse_filehandle *fufh;
279 FS_DEBUG("id=%jd type=%d\n", (intmax_t)fh_id, fufh_type);
280 fufh = &(fvdat->fufh[fufh_type]);
281 MPASS(!FUFH_IS_VALID(fufh));
283 fufh->fh_type = fufh_type;
284 if (!FUFH_IS_VALID(fufh)) {
285 panic("FUSE: init: invalid filehandle id (type=%d)", fufh_type);
290 atomic_add_acq_int(&fuse_fh_count, 1);