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 * $FreeBSD: releng/10.4/sys/fs/fuse/fuse_internal.h 253498 2013-07-20 14:50:35Z pfg $
56 */
57
58 #ifndef _FUSE_INTERNAL_H_
59 #define _FUSE_INTERNAL_H_
60
61 #include <sys/types.h>
62 #include <sys/uio.h>
63 #include <sys/stat.h>
64 #include <sys/vnode.h>
65
66 #include "fuse_ipc.h"
67 #include "fuse_node.h"
68
69 static __inline int
70 vfs_isrdonly(struct mount *mp)
71 {
72 return ((mp->mnt_flag & MNT_RDONLY) != 0 ? 1 : 0);
73 }
74
75 static __inline struct mount *
76 vnode_mount(struct vnode *vp)
77 {
78 return (vp->v_mount);
79 }
80
81 static __inline int
82 vnode_mountedhere(struct vnode *vp)
83 {
84 return (vp->v_mountedhere != NULL ? 1 : 0);
85 }
86
87 static __inline enum vtype
88 vnode_vtype(struct vnode *vp)
89 {
90 return (vp->v_type);
91 }
92
93 static __inline int
94 vnode_isvroot(struct vnode *vp)
95 {
96 return ((vp->v_vflag & VV_ROOT) != 0 ? 1 : 0);
97 }
98
99 static __inline int
100 vnode_isreg(struct vnode *vp)
101 {
102 return (vp->v_type == VREG ? 1 : 0);
103 }
104
105 static __inline int
106 vnode_isdir(struct vnode *vp)
107 {
108 return (vp->v_type == VDIR ? 1 : 0);
109 }
110
111 static __inline int
112 vnode_islnk(struct vnode *vp)
113 {
114 return (vp->v_type == VLNK ? 1 : 0);
115 }
116
117 static __inline ssize_t
118 uio_resid(struct uio *uio)
119 {
120 return (uio->uio_resid);
121 }
122
123 static __inline off_t
124 uio_offset(struct uio *uio)
125 {
126 return (uio->uio_offset);
127 }
128
129 static __inline void
130 uio_setoffset(struct uio *uio, off_t offset)
131 {
132 uio->uio_offset = offset;
133 }
134
135 static __inline void
136 uio_setresid(struct uio *uio, ssize_t resid)
137 {
138 uio->uio_resid = resid;
139 }
140
141 /* miscellaneous */
142
143 static __inline__
144 int
145 fuse_isdeadfs(struct vnode *vp)
146 {
147 struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));
148
149 return (data->dataflags & FSESS_DEAD);
150 }
151
152 static __inline__
153 int
154 fuse_iosize(struct vnode *vp)
155 {
156 return vp->v_mount->mnt_stat.f_iosize;
157 }
158
159 /* access */
160
161 #define FVP_ACCESS_NOOP 0x01
162
163 #define FACCESS_VA_VALID 0x01
164 #define FACCESS_DO_ACCESS 0x02
165 #define FACCESS_STICKY 0x04
166 #define FACCESS_CHOWN 0x08
167 #define FACCESS_NOCHECKSPY 0x10
168 #define FACCESS_SETGID 0x12
169
170 #define FACCESS_XQUERIES FACCESS_STICKY | FACCESS_CHOWN | FACCESS_SETGID
171
172 struct fuse_access_param {
173 uid_t xuid;
174 gid_t xgid;
175 uint32_t facc_flags;
176 };
177
178 static __inline int
179 fuse_match_cred(struct ucred *basecred, struct ucred *usercred)
180 {
181 if (basecred->cr_uid == usercred->cr_uid &&
182 basecred->cr_uid == usercred->cr_ruid &&
183 basecred->cr_uid == usercred->cr_svuid &&
184 basecred->cr_groups[0] == usercred->cr_groups[0] &&
185 basecred->cr_groups[0] == usercred->cr_rgid &&
186 basecred->cr_groups[0] == usercred->cr_svgid)
187 return 0;
188
189 return EPERM;
190 }
191
192 int
193 fuse_internal_access(struct vnode *vp,
194 mode_t mode,
195 struct fuse_access_param *facp,
196 struct thread *td,
197 struct ucred *cred);
198
199 /* attributes */
200
201 static __inline
202 void
203 fuse_internal_attr_fat2vat(struct mount *mp,
204 struct fuse_attr *fat,
205 struct vattr *vap)
206 {
207 DEBUGX(FUSE_DEBUG_INTERNAL,
208 "node #%ju, mode 0%o\n", (uintmax_t)fat->ino, fat->mode);
209
210 vattr_null(vap);
211
212 vap->va_fsid = mp->mnt_stat.f_fsid.val[0];
213 vap->va_fileid = fat->ino; /* XXX cast from 64 bits to 32 */
214 vap->va_mode = fat->mode & ~S_IFMT;
215 vap->va_nlink = fat->nlink;
216 vap->va_uid = fat->uid;
217 vap->va_gid = fat->gid;
218 vap->va_rdev = fat->rdev;
219 vap->va_size = fat->size;
220 vap->va_atime.tv_sec = fat->atime; /* XXX on some platforms cast from 64 bits to 32 */
221 vap->va_atime.tv_nsec = fat->atimensec;
222 vap->va_mtime.tv_sec = fat->mtime;
223 vap->va_mtime.tv_nsec = fat->mtimensec;
224 vap->va_ctime.tv_sec = fat->ctime;
225 vap->va_ctime.tv_nsec = fat->ctimensec;
226 vap->va_blocksize = PAGE_SIZE;
227 vap->va_type = IFTOVT(fat->mode);
228
229 #if (S_BLKSIZE == 512)
230 /* Optimize this case */
231 vap->va_bytes = fat->blocks << 9;
232 #else
233 vap->va_bytes = fat->blocks * S_BLKSIZE;
234 #endif
235
236 vap->va_flags = 0;
237 }
238
239
240 #define cache_attrs(vp, fuse_out) \
241 fuse_internal_attr_fat2vat(vnode_mount(vp), &(fuse_out)->attr, \
242 VTOVA(vp));
243
244 /* fsync */
245
246 int
247 fuse_internal_fsync(struct vnode *vp,
248 struct thread *td,
249 struct ucred *cred,
250 struct fuse_filehandle *fufh);
251
252 int
253 fuse_internal_fsync_callback(struct fuse_ticket *tick, struct uio *uio);
254
255 /* readdir */
256
257 struct pseudo_dirent {
258 uint32_t d_namlen;
259 };
260
261 int
262 fuse_internal_readdir(struct vnode *vp,
263 struct uio *uio,
264 struct fuse_filehandle *fufh,
265 struct fuse_iov *cookediov);
266
267 int
268 fuse_internal_readdir_processdata(struct uio *uio,
269 size_t reqsize,
270 void *buf,
271 size_t bufsize,
272 void *param);
273
274 /* remove */
275
276 int
277 fuse_internal_remove(struct vnode *dvp,
278 struct vnode *vp,
279 struct componentname *cnp,
280 enum fuse_opcode op);
281
282 /* rename */
283
284 int
285 fuse_internal_rename(struct vnode *fdvp,
286 struct componentname *fcnp,
287 struct vnode *tdvp,
288 struct componentname *tcnp);
289 /* revoke */
290
291 void
292 fuse_internal_vnode_disappear(struct vnode *vp);
293
294 /* strategy */
295
296 /* entity creation */
297
298 static __inline
299 int
300 fuse_internal_checkentry(struct fuse_entry_out *feo, enum vtype vtyp)
301 {
302 DEBUGX(FUSE_DEBUG_INTERNAL,
303 "feo=%p, vtype=%d\n", feo, vtyp);
304
305 if (vtyp != IFTOVT(feo->attr.mode)) {
306 DEBUGX(FUSE_DEBUG_INTERNAL,
307 "EINVAL -- %x != %x\n", vtyp, IFTOVT(feo->attr.mode));
308 return EINVAL;
309 }
310
311 if (feo->nodeid == FUSE_NULL_ID) {
312 DEBUGX(FUSE_DEBUG_INTERNAL,
313 "EINVAL -- feo->nodeid is NULL\n");
314 return EINVAL;
315 }
316
317 if (feo->nodeid == FUSE_ROOT_ID) {
318 DEBUGX(FUSE_DEBUG_INTERNAL,
319 "EINVAL -- feo->nodeid is FUSE_ROOT_ID\n");
320 return EINVAL;
321 }
322
323 return 0;
324 }
325
326 int
327 fuse_internal_newentry(struct vnode *dvp,
328 struct vnode **vpp,
329 struct componentname *cnp,
330 enum fuse_opcode op,
331 void *buf,
332 size_t bufsize,
333 enum vtype vtyp);
334
335 void
336 fuse_internal_newentry_makerequest(struct mount *mp,
337 uint64_t dnid,
338 struct componentname *cnp,
339 enum fuse_opcode op,
340 void *buf,
341 size_t bufsize,
342 struct fuse_dispatcher *fdip);
343
344 int
345 fuse_internal_newentry_core(struct vnode *dvp,
346 struct vnode **vpp,
347 struct componentname *cnp,
348 enum vtype vtyp,
349 struct fuse_dispatcher *fdip);
350
351 /* entity destruction */
352
353 int
354 fuse_internal_forget_callback(struct fuse_ticket *tick, struct uio *uio);
355
356 void
357 fuse_internal_forget_send(struct mount *mp,
358 struct thread *td,
359 struct ucred *cred,
360 uint64_t nodeid,
361 uint64_t nlookup);
362
363 /* fuse start/stop */
364
365 int fuse_internal_init_callback(struct fuse_ticket *tick, struct uio *uio);
366 void fuse_internal_send_init(struct fuse_data *data, struct thread *td);
367
368 #endif /* _FUSE_INTERNAL_H_ */
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