aboutsummaryrefslogtreecommitdiffstats
path: root/include/net/9p/9p.h
blob: 7726ff41c3e68722026bd91469fe2148c633c1e2 (plain) (blame)
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
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
/*
 * include/net/9p/9p.h
 *
 * 9P protocol definitions.
 *
 *  Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
 *  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 version 2
 *  as published by the Free Software Foundation.
 *
 *  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
 *
 */

#ifndef NET_9P_H
#define NET_9P_H

#ifdef CONFIG_NET_9P_DEBUG

#define P9_DEBUG_ERROR		(1<<0)
#define P9_DEBUG_9P	        (1<<2)
#define P9_DEBUG_VFS	        (1<<3)
#define P9_DEBUG_CONV		(1<<4)
#define P9_DEBUG_MUX		(1<<5)
#define P9_DEBUG_TRANS		(1<<6)
#define P9_DEBUG_SLABS	      	(1<<7)
#define P9_DEBUG_FCALL		(1<<8)

extern unsigned int p9_debug_level;

#define P9_DPRINTK(level, format, arg...) \
do {  \
	if ((p9_debug_level & level) == level) \
		printk(KERN_NOTICE "-- %s (%d): " \
		format , __FUNCTION__, current->pid , ## arg); \
} while (0)

#define PRINT_FCALL_ERROR(s, fcall) P9_DPRINTK(P9_DEBUG_ERROR,   \
	"%s: %.*s\n", s, fcall?fcall->params.rerror.error.len:0, \
	fcall?fcall->params.rerror.error.str:"");

#else
#define P9_DPRINTK(level, format, arg...)  do { } while (0)
#define PRINT_FCALL_ERROR(s, fcall) do { } while (0)
#endif

#define P9_EPRINTK(level, format, arg...) \
do { \
	printk(level "9p: %s (%d): " \
		format , __FUNCTION__, current->pid , ## arg); \
} while (0)


/* Message Types */
enum {
	P9_TVERSION = 100,
	P9_RVERSION,
	P9_TAUTH = 102,
	P9_RAUTH,
	P9_TATTACH = 104,
	P9_RATTACH,
	P9_TERROR = 106,
	P9_RERROR,
	P9_TFLUSH = 108,
	P9_RFLUSH,
	P9_TWALK = 110,
	P9_RWALK,
	P9_TOPEN = 112,
	P9_ROPEN,
	P9_TCREATE = 114,
	P9_RCREATE,
	P9_TREAD = 116,
	P9_RREAD,
	P9_TWRITE = 118,
	P9_RWRITE,
	P9_TCLUNK = 120,
	P9_RCLUNK,
	P9_TREMOVE = 122,
	P9_RREMOVE,
	P9_TSTAT = 124,
	P9_RSTAT,
	P9_TWSTAT = 126,
	P9_RWSTAT,
};

/* open modes */
enum {
	P9_OREAD = 0x00,
	P9_OWRITE = 0x01,
	P9_ORDWR = 0x02,
	P9_OEXEC = 0x03,
	P9_OEXCL = 0x04,
	P9_OTRUNC = 0x10,
	P9_OREXEC = 0x20,
	P9_ORCLOSE = 0x40,
	P9_OAPPEND = 0x80,
};

/* permissions */
enum {
	P9_DMDIR = 0x80000000,
	P9_DMAPPEND = 0x40000000,
	P9_DMEXCL = 0x20000000,
	P9_DMMOUNT = 0x10000000,
	P9_DMAUTH = 0x08000000,
	P9_DMTMP = 0x04000000,
	P9_DMSYMLINK = 0x02000000,
	P9_DMLINK = 0x01000000,
	/* 9P2000.u extensions */
	P9_DMDEVICE = 0x00800000,
	P9_DMNAMEDPIPE = 0x00200000,
	P9_DMSOCKET = 0x00100000,
	P9_DMSETUID = 0x00080000,
	P9_DMSETGID = 0x00040000,
};

/* qid.types */
enum {
	P9_QTDIR = 0x80,
	P9_QTAPPEND = 0x40,
	P9_QTEXCL = 0x20,
	P9_QTMOUNT = 0x10,
	P9_QTAUTH = 0x08,
	P9_QTTMP = 0x04,
	P9_QTSYMLINK = 0x02,
	P9_QTLINK = 0x01,
	P9_QTFILE = 0x00,
};

#define P9_NOTAG	(u16)(~0)
#define P9_NOFID	(u32)(~0)
#define P9_MAXWELEM	16

/* ample room for Twrite/Rread header */
#define P9_IOHDRSZ	24

struct p9_str {
	u16 len;
	char *str;
};

/* qids are the unique ID for a file (like an inode */
struct p9_qid {
	u8 type;
	u32 version;
	u64 path;
};

/* Plan 9 file metadata (stat) structure */
struct p9_stat {
	u16 size;
	u16 type;
	u32 dev;
	struct p9_qid qid;
	u32 mode;
	u32 atime;
	u32 mtime;
	u64 length;
	struct p9_str name;
	struct p9_str uid;
	struct p9_str gid;
	struct p9_str muid;
	struct p9_str extension;	/* 9p2000.u extensions */
	u32 n_uid;			/* 9p2000.u extensions */
	u32 n_gid;			/* 9p2000.u extensions */
	u32 n_muid;			/* 9p2000.u extensions */
};

/* file metadata (stat) structure used to create Twstat message
   The is similar to p9_stat, but the strings don't point to
   the same memory block and should be freed separately
*/
struct p9_wstat {
	u16 size;
	u16 type;
	u32 dev;
	struct p9_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 */
};

/* Structures for Protocol Operations */
struct p9_tversion {
	u32 msize;
	struct p9_str version;
};

struct p9_rversion {
	u32 msize;
	struct p9_str version;
};

struct p9_tauth {
	u32 afid;
	struct p9_str uname;
	struct p9_str aname;
};

struct p9_rauth {
	struct p9_qid qid;
};

struct p9_rerror {
	struct p9_str error;
	u32 errno;		/* 9p2000.u extension */
};

struct p9_tflush {
	u16 oldtag;
};

struct p9_rflush {
};

struct p9_tattach {
	u32 fid;
	u32 afid;
	struct p9_str uname;
	struct p9_str aname;
};

struct p9_rattach {
	struct p9_qid qid;
};

struct p9_twalk {
	u32 fid;
	u32 newfid;
	u16 nwname;
	struct p9_str wnames[16];
};

struct p9_rwalk {
	u16 nwqid;
	struct p9_qid wqids[16];
};

struct p9_topen {
	u32 fid;
	u8 mode;
};

struct p9_ropen {
	struct p9_qid qid;
	u32 iounit;
};

struct p9_tcreate {
	u32 fid;
	struct p9_str name;
	u32 perm;
	u8 mode;
	struct p9_str extension;
};

struct p9_rcreate {
	struct p9_qid qid;
	u32 iounit;
};

struct p9_tread {
	u32 fid;
	u64 offset;
	u32 count;
};

struct p9_rread {
	u32 count;
	u8 *data;
};

struct p9_twrite {
	u32 fid;
	u64 offset;
	u32 count;
	u8 *data;
};

struct p9_rwrite {
	u32 count;
};

struct p9_tclunk {
	u32 fid;
};

struct p9_rclunk {
};

struct p9_tremove {
	u32 fid;
};

struct p9_rremove {
};

struct p9_tstat {
	u32 fid;
};

struct p9_rstat {
	struct p9_stat stat;
};

struct p9_twstat {
	u32 fid;
	struct p9_stat stat;
};

struct p9_rwstat {
};

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

struct p9_fcall {
	u32 size;
	u8 id;
	u16 tag;
	void *sdata;

	union {
		struct p9_tversion tversion;
		struct p9_rversion rversion;
		struct p9_tauth tauth;
		struct p9_rauth rauth;
		struct p9_rerror rerror;
		struct p9_tflush tflush;
		struct p9_rflush rflush;
		struct p9_tattach tattach;
		struct p9_rattach rattach;
		struct p9_twalk twalk;
		struct p9_rwalk rwalk;
		struct p9_topen topen;
		struct p9_ropen ropen;
		struct p9_tcreate tcreate;
		struct p9_rcreate rcreate;
		struct p9_tread tread;
		struct p9_rread rread;
		struct p9_twrite twrite;
		struct p9_rwrite rwrite;
		struct p9_tclunk tclunk;
		struct p9_rclunk rclunk;
		struct p9_tremove tremove;
		struct p9_rremove rremove;
		struct p9_tstat tstat;
		struct p9_rstat rstat;
		struct p9_twstat twstat;
		struct p9_rwstat rwstat;
	} params;
};

struct p9_idpool;

int p9_deserialize_stat(void *buf, u32 buflen, struct p9_stat *stat,
	int dotu);
int p9_deserialize_fcall(void *buf, u32 buflen, struct p9_fcall *fc, int dotu);
void p9_set_tag(struct p9_fcall *fc, u16 tag);
struct p9_fcall *p9_create_tversion(u32 msize, char *version);
struct p9_fcall *p9_create_tattach(u32 fid, u32 afid, char *uname,
	char *aname);
struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname);
struct p9_fcall *p9_create_tflush(u16 oldtag);
struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname,
	char **wnames);
struct p9_fcall *p9_create_topen(u32 fid, u8 mode);
struct p9_fcall *p9_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
	char *extension, int dotu);
struct p9_fcall *p9_create_tread(u32 fid, u64 offset, u32 count);
struct p9_fcall *p9_create_twrite(u32 fid, u64 offset, u32 count,
	const char *data);
struct p9_fcall *p9_create_twrite_u(u32 fid, u64 offset, u32 count,
	const char __user *data);
struct p9_fcall *p9_create_tclunk(u32 fid);
struct p9_fcall *p9_create_tremove(u32 fid);
struct p9_fcall *p9_create_tstat(u32 fid);
struct p9_fcall *p9_create_twstat(u32 fid, struct p9_wstat *wstat,
	int dotu);

int p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int dotu);
int p9_errstr2errno(char *errstr, int len);

struct p9_idpool *p9_idpool_create(void);
void p9_idpool_destroy(struct p9_idpool *);
int p9_idpool_get(struct p9_idpool *p);
void p9_idpool_put(int id, struct p9_idpool *p);
int p9_idpool_check(int id, struct p9_idpool *p);

int p9_error_init(void);
int p9_errstr2errno(char *, int);

#ifdef CONFIG_SYSCTL
int __init p9_sysctl_register(void);
void __exit p9_sysctl_unregister(void);
#else
static inline int p9_sysctl_register(void)
{
	return 0;
}
static inline void p9_sysctl_unregister(void)
{
}
#endif

#endif /* NET_9P_H */