1/*
2 * Copyright (c) 2007-2009 Google Inc. and Amit Singh
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
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
14 * distribution.
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.
18 *
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.
30 *
31 * Copyright (C) 2005 Csaba Henk.
32 * All rights reserved.
33 *
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
36 * are met:
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.
42 *
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
53 * SUCH DAMAGE.
54 */
55
56#include <sys/cdefs.h>
| 1/*
2 * Copyright (c) 2007-2009 Google Inc. and Amit Singh
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
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
14 * distribution.
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.
18 *
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.
30 *
31 * Copyright (C) 2005 Csaba Henk.
32 * All rights reserved.
33 *
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
36 * are met:
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.
42 *
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
53 * SUCH DAMAGE.
54 */
55
56#include <sys/cdefs.h>
|
57__FBSDID("$FreeBSD: head/sys/fs/fuse/fuse_file.c 242727 2012-11-08 00:32:49Z attilio $");
| 57__FBSDID("$FreeBSD: head/sys/fs/fuse/fuse_file.c 299753 2016-05-14 20:03:22Z rmacklem $");
|
58
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>
65#include <sys/conf.h>
66#include <sys/uio.h>
67#include <sys/malloc.h>
68#include <sys/queue.h>
69#include <sys/lock.h>
70#include <sys/sx.h>
71#include <sys/mutex.h>
72#include <sys/proc.h>
73#include <sys/mount.h>
74#include <sys/vnode.h>
75#include <sys/sysctl.h>
76
77#include "fuse.h"
78#include "fuse_file.h"
79#include "fuse_internal.h"
80#include "fuse_ipc.h"
81#include "fuse_node.h"
82
83#define FUSE_DEBUG_MODULE FILE
84#include "fuse_debug.h"
85
86static int fuse_fh_count = 0;
87
88SYSCTL_INT(_vfs_fuse, OID_AUTO, filehandle_count, CTLFLAG_RD,
89 &fuse_fh_count, 0, "");
90
91int
92fuse_filehandle_open(struct vnode *vp,
93 fufh_type_t fufh_type,
94 struct fuse_filehandle **fufhp,
95 struct thread *td,
96 struct ucred *cred)
97{
98 struct fuse_dispatcher fdi;
99 struct fuse_open_in *foi;
100 struct fuse_open_out *foo;
101
102 int err = 0;
103 int isdir = 0;
104 int oflags = 0;
105 int op = FUSE_OPEN;
106
107 fuse_trace_printf("fuse_filehandle_open(vp=%p, fufh_type=%d)\n",
108 vp, fufh_type);
109
110 if (fuse_filehandle_valid(vp, fufh_type)) {
111 panic("FUSE: filehandle_open called despite valid fufh (type=%d)",
112 fufh_type);
113 /* NOTREACHED */
114 }
115 /*
116 * Note that this means we are effectively FILTERING OUT open() flags.
117 */
118 oflags = fuse_filehandle_xlate_to_oflags(fufh_type);
119
120 if (vnode_isdir(vp)) {
121 isdir = 1;
122 op = FUSE_OPENDIR;
123 if (fufh_type != FUFH_RDONLY) {
124 printf("FUSE:non-rdonly fh requested for a directory?\n");
125 fufh_type = FUFH_RDONLY;
126 }
127 }
128 fdisp_init(&fdi, sizeof(*foi));
129 fdisp_make_vp(&fdi, op, vp, td, cred);
130
131 foi = fdi.indata;
132 foi->flags = oflags;
133
134 if ((err = fdisp_wait_answ(&fdi))) {
135 debug_printf("OUCH ... daemon didn't give fh (err = %d)\n", err);
136 if (err == ENOENT) {
137 fuse_internal_vnode_disappear(vp);
138 }
139 goto out;
140 }
141 foo = fdi.answ;
142
143 fuse_filehandle_init(vp, fufh_type, fufhp, foo->fh);
| 58
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>
65#include <sys/conf.h>
66#include <sys/uio.h>
67#include <sys/malloc.h>
68#include <sys/queue.h>
69#include <sys/lock.h>
70#include <sys/sx.h>
71#include <sys/mutex.h>
72#include <sys/proc.h>
73#include <sys/mount.h>
74#include <sys/vnode.h>
75#include <sys/sysctl.h>
76
77#include "fuse.h"
78#include "fuse_file.h"
79#include "fuse_internal.h"
80#include "fuse_ipc.h"
81#include "fuse_node.h"
82
83#define FUSE_DEBUG_MODULE FILE
84#include "fuse_debug.h"
85
86static int fuse_fh_count = 0;
87
88SYSCTL_INT(_vfs_fuse, OID_AUTO, filehandle_count, CTLFLAG_RD,
89 &fuse_fh_count, 0, "");
90
91int
92fuse_filehandle_open(struct vnode *vp,
93 fufh_type_t fufh_type,
94 struct fuse_filehandle **fufhp,
95 struct thread *td,
96 struct ucred *cred)
97{
98 struct fuse_dispatcher fdi;
99 struct fuse_open_in *foi;
100 struct fuse_open_out *foo;
101
102 int err = 0;
103 int isdir = 0;
104 int oflags = 0;
105 int op = FUSE_OPEN;
106
107 fuse_trace_printf("fuse_filehandle_open(vp=%p, fufh_type=%d)\n",
108 vp, fufh_type);
109
110 if (fuse_filehandle_valid(vp, fufh_type)) {
111 panic("FUSE: filehandle_open called despite valid fufh (type=%d)",
112 fufh_type);
113 /* NOTREACHED */
114 }
115 /*
116 * Note that this means we are effectively FILTERING OUT open() flags.
117 */
118 oflags = fuse_filehandle_xlate_to_oflags(fufh_type);
119
120 if (vnode_isdir(vp)) {
121 isdir = 1;
122 op = FUSE_OPENDIR;
123 if (fufh_type != FUFH_RDONLY) {
124 printf("FUSE:non-rdonly fh requested for a directory?\n");
125 fufh_type = FUFH_RDONLY;
126 }
127 }
128 fdisp_init(&fdi, sizeof(*foi));
129 fdisp_make_vp(&fdi, op, vp, td, cred);
130
131 foi = fdi.indata;
132 foi->flags = oflags;
133
134 if ((err = fdisp_wait_answ(&fdi))) {
135 debug_printf("OUCH ... daemon didn't give fh (err = %d)\n", err);
136 if (err == ENOENT) {
137 fuse_internal_vnode_disappear(vp);
138 }
139 goto out;
140 }
141 foo = fdi.answ;
142
143 fuse_filehandle_init(vp, fufh_type, fufhp, foo->fh);
|
144 fuse_vnode_open(vp, foo->open_flags, td);
| |
145
| 144
|
| 145 /*
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.
150 */
151 if (fufh_type == FUFH_WRONLY)
152 fuse_vnode_open(vp, foo->open_flags | FOPEN_DIRECT_IO, td);
153 else
154 fuse_vnode_open(vp, foo->open_flags, td);
155
|
146out:
147 fdisp_destroy(&fdi);
148 return err;
149}
150
151int
152fuse_filehandle_close(struct vnode *vp,
153 fufh_type_t fufh_type,
154 struct thread *td,
155 struct ucred *cred)
156{
157 struct fuse_dispatcher fdi;
158 struct fuse_release_in *fri;
159 struct fuse_vnode_data *fvdat = VTOFUD(vp);
160 struct fuse_filehandle *fufh = NULL;
161
162 int err = 0;
163 int isdir = 0;
164 int op = FUSE_RELEASE;
165
166 fuse_trace_printf("fuse_filehandle_put(vp=%p, fufh_type=%d)\n",
167 vp, fufh_type);
168
169 fufh = &(fvdat->fufh[fufh_type]);
170 if (!FUFH_IS_VALID(fufh)) {
171 panic("FUSE: filehandle_put called on invalid fufh (type=%d)",
172 fufh_type);
173 /* NOTREACHED */
174 }
175 if (fuse_isdeadfs(vp)) {
176 goto out;
177 }
178 if (vnode_isdir(vp)) {
179 op = FUSE_RELEASEDIR;
180 isdir = 1;
181 }
182 fdisp_init(&fdi, sizeof(*fri));
183 fdisp_make_vp(&fdi, op, vp, td, cred);
184 fri = fdi.indata;
185 fri->fh = fufh->fh_id;
186 fri->flags = fuse_filehandle_xlate_to_oflags(fufh_type);
187
188 err = fdisp_wait_answ(&fdi);
189 fdisp_destroy(&fdi);
190
191out:
192 atomic_subtract_acq_int(&fuse_fh_count, 1);
193 fufh->fh_id = (uint64_t)-1;
194 fufh->fh_type = FUFH_INVALID;
195
196 return err;
197}
198
199int
200fuse_filehandle_valid(struct vnode *vp, fufh_type_t fufh_type)
201{
202 struct fuse_vnode_data *fvdat = VTOFUD(vp);
203 struct fuse_filehandle *fufh;
204
205 fufh = &(fvdat->fufh[fufh_type]);
206 return FUFH_IS_VALID(fufh);
207}
208
209int
210fuse_filehandle_get(struct vnode *vp, fufh_type_t fufh_type,
211 struct fuse_filehandle **fufhp)
212{
213 struct fuse_vnode_data *fvdat = VTOFUD(vp);
214 struct fuse_filehandle *fufh;
215
216 fufh = &(fvdat->fufh[fufh_type]);
217 if (!FUFH_IS_VALID(fufh))
218 return EBADF;
219 if (fufhp != NULL)
220 *fufhp = fufh;
221 return 0;
222}
223
224int
225fuse_filehandle_getrw(struct vnode *vp, fufh_type_t fufh_type,
226 struct fuse_filehandle **fufhp)
227{
228 struct fuse_vnode_data *fvdat = VTOFUD(vp);
229 struct fuse_filehandle *fufh;
230
231 fufh = &(fvdat->fufh[fufh_type]);
232 if (!FUFH_IS_VALID(fufh)) {
233 fufh_type = FUFH_RDWR;
234 }
235 return fuse_filehandle_get(vp, fufh_type, fufhp);
236}
237
238void
239fuse_filehandle_init(struct vnode *vp,
240 fufh_type_t fufh_type,
241 struct fuse_filehandle **fufhp,
242 uint64_t fh_id)
243{
244 struct fuse_vnode_data *fvdat = VTOFUD(vp);
245 struct fuse_filehandle *fufh;
246
247 FS_DEBUG("id=%jd type=%d\n", (intmax_t)fh_id, fufh_type);
248 fufh = &(fvdat->fufh[fufh_type]);
249 MPASS(!FUFH_IS_VALID(fufh));
250 fufh->fh_id = fh_id;
251 fufh->fh_type = fufh_type;
252 if (!FUFH_IS_VALID(fufh)) {
253 panic("FUSE: init: invalid filehandle id (type=%d)", fufh_type);
254 }
255 if (fufhp != NULL)
256 *fufhp = fufh;
257
258 atomic_add_acq_int(&fuse_fh_count, 1);
259}
| 156out:
157 fdisp_destroy(&fdi);
158 return err;
159}
160
161int
162fuse_filehandle_close(struct vnode *vp,
163 fufh_type_t fufh_type,
164 struct thread *td,
165 struct ucred *cred)
166{
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;
171
172 int err = 0;
173 int isdir = 0;
174 int op = FUSE_RELEASE;
175
176 fuse_trace_printf("fuse_filehandle_put(vp=%p, fufh_type=%d)\n",
177 vp, fufh_type);
178
179 fufh = &(fvdat->fufh[fufh_type]);
180 if (!FUFH_IS_VALID(fufh)) {
181 panic("FUSE: filehandle_put called on invalid fufh (type=%d)",
182 fufh_type);
183 /* NOTREACHED */
184 }
185 if (fuse_isdeadfs(vp)) {
186 goto out;
187 }
188 if (vnode_isdir(vp)) {
189 op = FUSE_RELEASEDIR;
190 isdir = 1;
191 }
192 fdisp_init(&fdi, sizeof(*fri));
193 fdisp_make_vp(&fdi, op, vp, td, cred);
194 fri = fdi.indata;
195 fri->fh = fufh->fh_id;
196 fri->flags = fuse_filehandle_xlate_to_oflags(fufh_type);
197
198 err = fdisp_wait_answ(&fdi);
199 fdisp_destroy(&fdi);
200
201out:
202 atomic_subtract_acq_int(&fuse_fh_count, 1);
203 fufh->fh_id = (uint64_t)-1;
204 fufh->fh_type = FUFH_INVALID;
205
206 return err;
207}
208
209int
210fuse_filehandle_valid(struct vnode *vp, fufh_type_t fufh_type)
211{
212 struct fuse_vnode_data *fvdat = VTOFUD(vp);
213 struct fuse_filehandle *fufh;
214
215 fufh = &(fvdat->fufh[fufh_type]);
216 return FUFH_IS_VALID(fufh);
217}
218
219int
220fuse_filehandle_get(struct vnode *vp, fufh_type_t fufh_type,
221 struct fuse_filehandle **fufhp)
222{
223 struct fuse_vnode_data *fvdat = VTOFUD(vp);
224 struct fuse_filehandle *fufh;
225
226 fufh = &(fvdat->fufh[fufh_type]);
227 if (!FUFH_IS_VALID(fufh))
228 return EBADF;
229 if (fufhp != NULL)
230 *fufhp = fufh;
231 return 0;
232}
233
234int
235fuse_filehandle_getrw(struct vnode *vp, fufh_type_t fufh_type,
236 struct fuse_filehandle **fufhp)
237{
238 struct fuse_vnode_data *fvdat = VTOFUD(vp);
239 struct fuse_filehandle *fufh;
240
241 fufh = &(fvdat->fufh[fufh_type]);
242 if (!FUFH_IS_VALID(fufh)) {
243 fufh_type = FUFH_RDWR;
244 }
245 return fuse_filehandle_get(vp, fufh_type, fufhp);
246}
247
248void
249fuse_filehandle_init(struct vnode *vp,
250 fufh_type_t fufh_type,
251 struct fuse_filehandle **fufhp,
252 uint64_t fh_id)
253{
254 struct fuse_vnode_data *fvdat = VTOFUD(vp);
255 struct fuse_filehandle *fufh;
256
257 FS_DEBUG("id=%jd type=%d\n", (intmax_t)fh_id, fufh_type);
258 fufh = &(fvdat->fufh[fufh_type]);
259 MPASS(!FUFH_IS_VALID(fufh));
260 fufh->fh_id = fh_id;
261 fufh->fh_type = fufh_type;
262 if (!FUFH_IS_VALID(fufh)) {
263 panic("FUSE: init: invalid filehandle id (type=%d)", fufh_type);
264 }
265 if (fufhp != NULL)
266 *fufhp = fufh;
267
268 atomic_add_acq_int(&fuse_fh_count, 1);
269}
|