aboutsummaryrefslogtreecommitdiff
path: root/fs/9p/9p.h
blob: 6355392786e2fab0cee8fa040334e13dd47e5abc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
/*
 * linux/fs/9p/9p.h
 *
 * 9P protocol definitions.
 *
 *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
 *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to:
 *  Free Software Foundation
 *  51 Franklin Street, Fifth Floor
 *  Boston, MA  02111-1301  USA
 *
 */

/* Message Types */
enum {
	TVERSION = 100,
	RVERSION,
	TAUTH = 102,
	RAUTH,
	TATTACH = 104,
	RATTACH,
	TERROR = 106,
	RERROR,
	TFLUSH = 108,
	RFLUSH,
	TWALK = 110,
	RWALK,
	TOPEN = 112,
	ROPEN,
	TCREATE = 114,
	RCREATE,
	TREAD = 116,
	RREAD,
	TWRITE = 118,
	RWRITE,
	TCLUNK = 120,
	RCLUNK,
	TREMOVE = 122,
	RREMOVE,
	TSTAT = 124,
	RSTAT,
	TWSTAT = 126,
	RWSTAT,
};

/* modes */
enum {
	V9FS_OREAD = 0x00,
	V9FS_OWRITE = 0x01,
	V9FS_ORDWR = 0x02,
	V9FS_OEXEC = 0x03,
	V9FS_OEXCL = 0x04,
	V9FS_OTRUNC = 0x10,
	V9FS_OREXEC = 0x20,
	V9FS_ORCLOSE = 0x40,
	V9FS_OAPPEND = 0x80,
};

/* permissions */
enum {
	V9FS_DMDIR = 0x80000000,
	V9FS_DMAPPEND = 0x40000000,
	V9FS_DMEXCL = 0x20000000,
	V9FS_DMMOUNT = 0x10000000,
	V9FS_DMAUTH = 0x08000000,
	V9FS_DMTMP = 0x04000000,
	V9FS_DMSYMLINK = 0x02000000,
	V9FS_DMLINK = 0x01000000,
	/* 9P2000.u extensions */
	V9FS_DMDEVICE = 0x00800000,
	V9FS_DMNAMEDPIPE = 0x00200000,
	V9FS_DMSOCKET = 0x00100000,
	V9FS_DMSETUID = 0x00080000,
	V9FS_DMSETGID = 0x00040000,
};

/* qid.types */
enum {
	V9FS_QTDIR = 0x80,
	V9FS_QTAPPEND = 0x40,
	V9FS_QTEXCL = 0x20,
	V9FS_QTMOUNT = 0x10,
	V9FS_QTAUTH = 0x08,
	V9FS_QTTMP = 0x04,
	V9FS_QTSYMLINK = 0x02,
	V9FS_QTLINK = 0x01,
	V9FS_QTFILE = 0x00,
};

#define V9FS_NOTAG	(u16)(~0)
#define V9FS_NOFID	(u32)(~0)

/* ample room for Twrite/Rread header (iounit) */
#define V9FS_IOHDRSZ	24

/* qids are the unique ID for a file (like an inode */
struct v9fs_qid {
	u8 type;
	u32 version;
	u64 path;
};

/* Plan 9 file metadata (stat) structure */
struct v9fs_stat {
	u16 size;
	u16 type;
	u32 dev;
	struct v9fs_qid qid;
	u32 mode;
	u32 atime;
	u32 mtime;
	u64 length;
	char *name;
	char *uid;
	char *gid;
	char *muid;
	char *extension;	/* 9p2000.u extensions */
	u32 n_uid;		/* 9p2000.u extensions */
	u32 n_gid;		/* 9p2000.u extensions */
	u32 n_muid;		/* 9p2000.u extensions */
	char data[0];
};

/* Structures for Protocol Operations */

struct Tversion {
	u32 msize;
	char *version;
};

struct Rversion {
	u32 msize;
	char *version;
};

struct Tauth {
	u32 afid;
	char *uname;
	char *aname;
};

struct Rauth {
	struct v9fs_qid qid;
};

struct Rerror {
	char *error;
	u32 errno;		/* 9p2000.u extension */
};

struct Tflush {
	u32 oldtag;
};

struct Rflush {
};

struct Tattach {
	u32 fid;
	u32 afid;
	char *uname;
	char *aname;
};

struct Rattach {
	struct v9fs_qid qid;
};

struct Twalk {
	u32 fid;
	u32 newfid;
	u32 nwname;
	char **wnames;
};

struct Rwalk {
	u32 nwqid;
	struct v9fs_qid *wqids;
};

struct Topen {
	u32 fid;
	u8 mode;
};

struct Ropen {
	struct v9fs_qid qid;
	u32 iounit;
};

struct Tcreate {
	u32 fid;
	char *name;
	u32 perm;
	u8 mode;
};

struct Rcreate {
	struct v9fs_qid qid;
	u32 iounit;
};

struct Tread {
	u32 fid;
	u64 offset;
	u32 count;
};

struct Rread {
	u32 count;
	u8 *data;
};

struct Twrite {
	u32 fid;
	u64 offset;
	u32 count;
	u8 *data;
};

struct Rwrite {
	u32 count;
};

struct Tclunk {
	u32 fid;
};

struct Rclunk {
};

struct Tremove {
	u32 fid;
};

struct Rremove {
};

struct Tstat {
	u32 fid;
};

struct Rstat {
	struct v9fs_stat *stat;
};

struct Twstat {
	u32 fid;
	struct v9fs_stat *stat;
};

struct Rwstat {
};

/*
  * fcall is the primary packet structure
  *
  */

struct v9fs_fcall {
	u32 size;
	u8 id;
	u16 tag;

	union {
		struct Tversion tversion;
		struct Rversion rversion;
		struct Tauth tauth;
		struct Rauth rauth;
		struct Rerror rerror;
		struct Tflush tflush;
		struct Rflush rflush;
		struct Tattach tattach;
		struct Rattach rattach;
		struct Twalk twalk;
		struct Rwalk rwalk;
		struct Topen topen;
		struct Ropen ropen;
		struct Tcreate tcreate;
		struct Rcreate rcreate;
		struct Tread tread;
		struct Rread rread;
		struct Twrite twrite;
		struct Rwrite rwrite;
		struct Tclunk tclunk;
		struct Rclunk rclunk;
		struct Tremove tremove;
		struct Rremove rremove;
		struct Tstat tstat;
		struct Rstat rstat;
		struct Twstat twstat;
		struct Rwstat rwstat;
	} params;
};

#define V9FS_FCALLHDRSZ (sizeof(struct v9fs_fcall) + \
	sizeof(struct v9fs_stat) + 16*sizeof(struct v9fs_qid) + 16)

#define FCALL_ERROR(fcall) (fcall ? fcall->params.rerror.error : "")

int v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
		   char *version, struct v9fs_fcall **rcall);

int v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
		  u32 fid, u32 afid, struct v9fs_fcall **rcall);

int v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid);

int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 oldtag);

int v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid,
		struct v9fs_fcall **rcall);

int v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
		 struct v9fs_stat *stat, struct v9fs_fcall **rcall);

int v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
		char *name, struct v9fs_fcall **rcall);

int v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
		struct v9fs_fcall **rcall);

int v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
		  struct v9fs_fcall **rcall);

int v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name,
		  u32 perm, u8 mode, struct v9fs_fcall **rcall);

int v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid,
		u64 offset, u32 count, struct v9fs_fcall **rcall);

int v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
		 u32 count, void *data, struct v9fs_fcall **rcall);