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
|
#ifndef __CODA_PSDEV_H
#define __CODA_PSDEV_H
#define CODA_PSDEV_MAJOR 67
#define MAX_CODADEVS 5 /* how many do we allow */
extern struct vcomm psdev_vcomm[];
/* queue stuff; the rest is static to psdev.c */
struct queue {
struct queue *forw, *back;
};
void coda_q_insert(struct queue *el, struct queue *q);
void coda_q_remove(struct queue *q);
#define CODA_SUPER_MAGIC 0x73757245
struct coda_sb_info
{
struct inode * sbi_psdev; /* /dev/cfs? Venus/kernel device */
struct inode * sbi_ctlcp; /* control magic file */
int sbi_refct;
struct vcomm * sbi_vcomm;
struct inode * sbi_root;
struct list_head sbi_cchead;
struct list_head sbi_volroothead;
};
/* communication pending/processing queues queues */
struct vcomm {
u_long vc_seq;
struct wait_queue *vc_waitq; /* Venus wait queue */
struct queue vc_pending;
struct queue vc_processing;
struct super_block *vc_sb;
int vc_inuse;
};
static inline int vcomm_open(struct vcomm *vcp)
{
return ((vcp)->vc_pending.forw != NULL);
}
static inline void mark_vcomm_closed(struct vcomm *vcp)
{
(vcp)->vc_pending.forw = NULL;
}
static inline struct coda_sb_info *coda_sbp(struct super_block *sb)
{
return ((struct coda_sb_info *)((sb)->u.generic_sbp));
}
extern void coda_psdev_detach(int unit);
extern int init_coda_psdev(void);
/* upcalls */
int venus_rootfid(struct super_block *sb, ViceFid *fidp);
int venus_getattr(struct super_block *sb, struct ViceFid *fid,
struct coda_vattr *attr);
int venus_setattr(struct super_block *, struct ViceFid *,
struct coda_vattr *);
int venus_lookup(struct super_block *sb, struct ViceFid *fid,
const char *name, int length, int *type,
struct ViceFid *resfid);
int venus_release(struct super_block *sb, struct ViceFid *fid, int flags);
int venus_open(struct super_block *sb, struct ViceFid *fid,
int flags, ino_t *ino, dev_t *dev);
int venus_mkdir(struct super_block *sb, struct ViceFid *dirfid,
const char *name, int length,
struct ViceFid *newfid, struct coda_vattr *attrs);
int venus_create(struct super_block *sb, struct ViceFid *dirfid,
const char *name, int length, int excl, int mode,
struct ViceFid *newfid, struct coda_vattr *attrs) ;
int venus_rmdir(struct super_block *sb, struct ViceFid *dirfid,
const char *name, int length);
int venus_remove(struct super_block *sb, struct ViceFid *dirfid,
const char *name, int length);
int venus_readlink(struct super_block *sb, struct ViceFid *fid,
char *buffer, int *length);
int venus_rename(struct super_block *, struct ViceFid *new_fid,
struct ViceFid *old_fid, size_t old_length,
size_t new_length, const char *old_name,
const char *new_name);
int venus_link(struct super_block *sb, struct ViceFid *fid,
struct ViceFid *dirfid, const char *name, int len );
int venus_symlink(struct super_block *sb, struct ViceFid *fid,
const char *name, int len, const char *symname, int symlen);
int venus_access(struct super_block *sb, struct ViceFid *fid, int mask);
int venus_pioctl(struct super_block *sb, struct ViceFid *fid,
unsigned int cmd, struct PioctlData *data);
int coda_downcall(int opcode, union outputArgs *out, struct super_block *sb);
int coda_upcall(struct coda_sb_info *mntinfo, int inSize,
int *outSize, union inputArgs *buffer);
int venus_fsync(struct super_block *sb, struct ViceFid *fid);
/* messages between coda filesystem in kernel and Venus */
extern int coda_hard;
extern unsigned long coda_timeout;
struct vmsg {
struct queue vm_chain;
caddr_t vm_data;
u_short vm_flags;
u_short vm_inSize; /* Size is at most 5000 bytes */
u_short vm_outSize;
u_short vm_opcode; /* copied from data to save lookup */
int vm_unique;
struct wait_queue *vm_sleep; /* process' wait queue */
unsigned long vm_posttime;
};
/*
* Statistics
*/
struct coda_upcallstats {
int ncalls; /* client requests */
int nbadcalls; /* upcall failures */
int reqs[CFS_NCALLS]; /* count of each request */
} ;
extern struct coda_upcallstats coda_callstats;
static inline void clstats(int opcode)
{
coda_callstats.ncalls++;
if ( (0 <= opcode) && (opcode <= CFS_NCALLS) )
coda_callstats.reqs[opcode]++;
else
printk("clstats called with bad opcode %d\n", opcode);
}
static inline void badclstats(void)
{
coda_callstats.nbadcalls++;
}
#endif
|
