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
|
#ifndef __9P_H__
#define __9P_H__ 1
#ifdef __cplusplus
extern "C" {
#endif
/*
#pragma src "/sys/src/lib9p"
#pragma lib "lib9p.a"
*/
AUTOLIB(9p)
/*
* Maps from ulongs to void*s.
*/
typedef struct Intmap Intmap;
Intmap* allocmap(void (*inc)(void*));
void freemap(Intmap*, void (*destroy)(void*));
void* lookupkey(Intmap*, ulong);
void* insertkey(Intmap*, ulong, void*);
int caninsertkey(Intmap*, ulong, void*);
void* deletekey(Intmap*, ulong);
/*
* Fid and Request structures.
*/
typedef struct Fid Fid;
typedef struct Req Req;
typedef struct Fidpool Fidpool;
typedef struct Reqpool Reqpool;
typedef struct File File;
typedef struct Filelist Filelist;
typedef struct Tree Tree;
typedef struct Readdir Readdir;
typedef struct Srv Srv;
struct Fid
{
ulong fid;
int omode; /* -1 = not open */
File* file;
char* uid;
Qid qid;
void* aux;
/* below is implementation-specific; don't use */
Readdir* rdir;
Ref ref;
Fidpool* pool;
vlong diroffset;
long dirindex;
};
struct Req
{
ulong tag;
void* aux;
Fcall ifcall;
Fcall ofcall;
Dir d;
Req* oldreq;
Fid* fid;
Fid* afid;
Fid* newfid;
Srv* srv;
/* below is implementation-specific; don't use */
QLock lk;
Ref ref;
Reqpool* pool;
uchar* buf;
uchar type;
uchar responded;
char* error;
void* rbuf;
Req** flush;
int nflush;
};
/*
* Pools to maintain Fid <-> fid and Req <-> tag maps.
*/
struct Fidpool {
Intmap *map;
void (*destroy)(Fid*);
Srv *srv;
};
struct Reqpool {
Intmap *map;
void (*destroy)(Req*);
Srv *srv;
};
Fidpool* allocfidpool(void (*destroy)(Fid*));
void freefidpool(Fidpool*);
Fid* allocfid(Fidpool*, ulong);
Fid* lookupfid(Fidpool*, ulong);
void closefid(Fid*);
Fid* removefid(Fidpool*, ulong);
Reqpool* allocreqpool(void (*destroy)(Req*));
void freereqpool(Reqpool*);
Req* allocreq(Reqpool*, ulong);
Req* lookupreq(Reqpool*, ulong);
void closereq(Req*);
Req* removereq(Reqpool*, ulong);
typedef int Dirgen(int, Dir*, void*);
void dirread9p(Req*, Dirgen*, void*);
/*
* File trees.
*/
struct File {
Ref ref;
Dir dir;
File *parent;
void *aux;
/* below is implementation-specific; don't use */
RWLock rwlock;
Filelist *filelist;
Tree *tree;
int nchild;
int allocd;
};
struct Tree {
File *root;
void (*destroy)(File *file);
/* below is implementation-specific; don't use */
Lock genlock;
ulong qidgen;
ulong dirqidgen;
};
Tree* alloctree(char*, char*, ulong, void(*destroy)(File*));
void freetree(Tree*);
File* createfile(File*, char*, char*, ulong, void*);
int removefile(File*);
void closefile(File*);
File* walkfile(File*, char*);
Readdir* opendirfile(File*);
long readdirfile(Readdir*, uchar*, long);
void closedirfile(Readdir*);
/*
* Kernel-style command parser
*/
typedef struct Cmdbuf Cmdbuf;
typedef struct Cmdtab Cmdtab;
Cmdbuf* parsecmd(char *a, int n);
void respondcmderror(Req*, Cmdbuf*, char*, ...);
Cmdtab* lookupcmd(Cmdbuf*, Cmdtab*, int);
/*
#pragma varargck argpos respondcmderr 3
*/
struct Cmdbuf
{
char *buf;
char **f;
int nf;
};
struct Cmdtab
{
int index; /* used by client to switch on result */
char *cmd; /* command name */
int narg; /* expected #args; 0 ==> variadic */
};
/*
* File service loop.
*/
struct Srv {
Tree* tree;
void (*destroyfid)(Fid*);
void (*destroyreq)(Req*);
void (*start)(Srv*);
void (*end)(Srv*);
void* aux;
void (*attach)(Req*);
void (*auth)(Req*);
void (*open)(Req*);
void (*create)(Req*);
void (*read)(Req*);
void (*write)(Req*);
void (*remove)(Req*);
void (*flush)(Req*);
void (*stat)(Req*);
void (*wstat)(Req*);
void (*walk)(Req*);
char* (*clone)(Fid*, Fid*);
char* (*walk1)(Fid*, char*, Qid*);
int infd;
int outfd;
int nopipe;
int srvfd;
int leavefdsopen; /* magic for acme win */
int foreground; /* run in foreground */
int fake;
/* below is implementation-specific; don't use */
Fidpool* fpool;
Reqpool* rpool;
uint msize;
uchar* rbuf;
QLock rlock;
uchar* wbuf;
QLock wlock;
};
void srv(Srv*);
void postmountsrv(Srv*, char*, char*, int);
int postfd(char*, int);
extern int chatty9p;
void respond(Req*, char*);
void threadpostmountsrv(Srv*, char*, char*, int);
/*
* Helper. Assumes user is same as group.
*/
int hasperm(File*, char*, int);
void* emalloc9p(ulong);
void* erealloc9p(void*, ulong);
char* estrdup9p(char*);
enum {
OMASK = 3
};
void readstr(Req*, char*);
void readbuf(Req*, void*, long);
void walkandclone(Req*, char*(*walk1)(Fid*,char*,void*), char*(*clone)(Fid*,Fid*,void*), void*);
#ifdef __cplusplus
}
#endif
#endif
|