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
|
/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef _CLIENT_T_H
#define _CLIENT_T_H
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "glusterfs.h"
#include "locking.h" /* for gf_lock_t, not included by glusterfs.h */
struct client_ctx {
void *ctx_key;
void *ctx_value;
};
typedef struct _client_t {
struct {
/* e.g. protocol/server stashes its ctx here */
gf_lock_t lock;
unsigned short count;
struct client_ctx *ctx;
} scratch_ctx;
struct {
gf_lock_t lock;
volatile int bind;
volatile int count;
} ref;
xlator_t *bound_xl;
xlator_t *this;
int tbl_index;
char *client_uid;
struct {
int flavour;
size_t len;
char *data;
char *username;
char *passwd;
} auth;
} client_t;
#define GF_CLIENTCTX_INITIAL_SIZE 8
struct client_table_entry {
client_t *client;
int next_free;
};
typedef struct client_table_entry cliententry_t;
struct clienttable {
unsigned int max_clients;
gf_lock_t lock;
cliententry_t *cliententries;
int first_free;
client_t *local;
};
typedef struct clienttable clienttable_t;
#define GF_CLIENTTABLE_INITIAL_SIZE 128
/* Signifies no more entries in the client table. */
#define GF_CLIENTTABLE_END -1
/* This is used to invalidate
* the next_free value in an cliententry that has been allocated
*/
#define GF_CLIENTENTRY_ALLOCATED -2
struct rpcsvc_auth_data;
/*
* a more comprehensive feature test is shown at
* http://lists.iptel.org/pipermail/semsdev/2010-October/005075.html
* this is sufficient for RHEL5 i386 builds
*/
#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)) && !defined(__i386__)
# define INCREMENT_ATOMIC(lk,op) __sync_add_and_fetch(&op, 1)
# define DECREMENT_ATOMIC(lk,op) __sync_sub_and_fetch(&op, 1)
#else
/* These are only here for old gcc, e.g. on RHEL5 i386.
* We're not ever going to use this in an if stmt,
* but let's be pedantically correct for style points */
# define INCREMENT_ATOMIC(lk,op) do { LOCK (&lk); ++op; UNLOCK (&lk); } while (0)
/* this is a gcc 'statement expression', it works with llvm/clang too */
# define DECREMENT_ATOMIC(lk,op) ({ LOCK (&lk); --op; UNLOCK (&lk); op; })
#endif
client_t *
gf_client_get (xlator_t *this, struct rpcsvc_auth_data *cred, char *client_uid);
void
gf_client_put (client_t *client, gf_boolean_t *detached);
clienttable_t *
gf_clienttable_alloc (void);
void
gf_client_clienttable_destroy (clienttable_t *clienttable);
client_t *
gf_client_ref (client_t *client);
void
gf_client_unref (client_t *client);
int
gf_client_dump_fdtable_to_dict (xlator_t *this, dict_t *dict);
int
gf_client_dump_fdtable (xlator_t *this);
int
gf_client_dump_inodes_to_dict (xlator_t *this, dict_t *dict);
int
gf_client_dump_inodes (xlator_t *this);
int
client_ctx_set (client_t *client, void *key, void *value);
int
client_ctx_get (client_t *client, void *key, void **value);
int
client_ctx_del (client_t *client, void *key, void **value);
void
client_ctx_dump (client_t *client, char *prefix);
int
gf_client_dump_fdtables_to_dict (xlator_t *this, dict_t *dict);
int
gf_client_dump_fdtables (xlator_t *this);
int
gf_client_dump_inodes_to_dict (xlator_t *this, dict_t *dict);
int
gf_client_dump_inodes (xlator_t *this);
int
gf_client_disconnect (client_t *client);
#endif /* _CLIENT_T_H */
|
