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
|
/* Copyright (c) 2005, 2012, Oracle and/or its affiliates.
Copyright (c) 2009, 2017, MariaDB Corporation.
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; version 2 of the License.
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 the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
#ifndef _sql_plugin_h
#define _sql_plugin_h
/*
the following #define adds server-only members to enum_mysql_show_type,
that is defined in plugin.h
*/
#define SHOW_always_last SHOW_KEY_CACHE_LONG, \
SHOW_HAVE, SHOW_MY_BOOL, SHOW_HA_ROWS, SHOW_SYS, \
SHOW_LONG_NOFLUSH, SHOW_LEX_STRING, \
/* SHOW_*_STATUS must be at the end, SHOW_LONG_STATUS being first */ \
SHOW_LONG_STATUS, SHOW_DOUBLE_STATUS, SHOW_LONGLONG_STATUS, \
SHOW_UINT32_STATUS
#include <my_global.h>
#undef SHOW_always_last
#include "m_string.h" /* LEX_STRING */
#include "my_alloc.h" /* MEM_ROOT */
class sys_var;
enum SHOW_COMP_OPTION { SHOW_OPTION_YES, SHOW_OPTION_NO, SHOW_OPTION_DISABLED};
enum enum_plugin_load_option { PLUGIN_OFF, PLUGIN_ON, PLUGIN_FORCE,
PLUGIN_FORCE_PLUS_PERMANENT };
extern const char *global_plugin_typelib_names[];
extern volatile int global_plugin_version;
extern ulong dlopen_count;
#include <my_sys.h>
#include "sql_list.h"
#ifdef DBUG_OFF
#define plugin_ref_to_int(A) A
#define plugin_int_to_ref(A) A
#else
#define plugin_ref_to_int(A) (A ? A[0] : NULL)
#define plugin_int_to_ref(A) &(A)
#endif
/*
the following flags are valid for plugin_init()
*/
#define PLUGIN_INIT_SKIP_DYNAMIC_LOADING 1U
#define PLUGIN_INIT_SKIP_PLUGIN_TABLE 2U
#define PLUGIN_INIT_SKIP_INITIALIZATION 4U
#define INITIAL_LEX_PLUGIN_LIST_SIZE 16
typedef enum enum_mysql_show_type SHOW_TYPE;
typedef struct st_mysql_show_var SHOW_VAR;
#define MYSQL_ANY_PLUGIN -1
/*
different values of st_plugin_int::state
though they look like a bitmap, plugin may only
be in one of those eigenstates, not in a superposition of them :)
It's a bitmap, because it makes it easier to test
"whether the state is one of those..."
*/
#define PLUGIN_IS_FREED 1U
#define PLUGIN_IS_DELETED 2U
#define PLUGIN_IS_UNINITIALIZED 4U
#define PLUGIN_IS_READY 8U
#define PLUGIN_IS_DYING 16U
#define PLUGIN_IS_DISABLED 32U
struct st_ptr_backup {
void **ptr;
void *value;
void save(void **p) { ptr= p; value= *p; }
void save(const char **p) { save((void**)p); }
void restore() { *ptr= value; }
};
/* A handle for the dynamic library containing a plugin or plugins. */
struct st_plugin_dl
{
LEX_CSTRING dl;
void *handle;
struct st_maria_plugin *plugins;
st_ptr_backup *ptr_backup;
uint nbackups;
uint ref_count; /* number of plugins loaded from the library */
int mysqlversion;
int mariaversion;
bool allocated;
};
/* A handle of a plugin */
struct st_plugin_int
{
LEX_CSTRING name;
struct st_maria_plugin *plugin;
struct st_plugin_dl *plugin_dl;
st_ptr_backup *ptr_backup;
uint nbackups;
uint state;
uint ref_count; /* number of threads using the plugin */
uint locks_total; /* how many times the plugin was locked */
void *data; /* plugin type specific, e.g. handlerton */
MEM_ROOT mem_root; /* memory for dynamic plugin structures */
sys_var *system_vars; /* server variables for this plugin */
enum enum_plugin_load_option load_option; /* OFF, ON, FORCE, F+PERMANENT */
};
extern mysql_mutex_t LOCK_plugin;
/*
See intern_plugin_lock() for the explanation for the
conditionally defined plugin_ref type
*/
#ifdef DBUG_OFF
typedef struct st_plugin_int *plugin_ref;
#define plugin_ref_to_int(A) A
#define plugin_int_to_ref(A) A
#define plugin_decl(pi) ((pi)->plugin)
#define plugin_dlib(pi) ((pi)->plugin_dl)
#define plugin_data(pi,cast) ((cast)((pi)->data))
#define plugin_name(pi) (&((pi)->name))
#define plugin_state(pi) ((pi)->state)
#define plugin_load_option(pi) ((pi)->load_option)
#define plugin_equals(p1,p2) ((p1) == (p2))
#else
typedef struct st_plugin_int **plugin_ref;
#define plugin_ref_to_int(A) (A ? A[0] : NULL)
#define plugin_int_to_ref(A) &(A)
#define plugin_decl(pi) ((pi)[0]->plugin)
#define plugin_dlib(pi) ((pi)[0]->plugin_dl)
#define plugin_data(pi,cast) ((cast)((pi)[0]->data))
#define plugin_name(pi) (&((pi)[0]->name))
#define plugin_state(pi) ((pi)[0]->state)
#define plugin_load_option(pi) ((pi)[0]->load_option)
#define plugin_equals(p1,p2) ((p1) && (p2) && (p1)[0] == (p2)[0])
#endif
typedef int (*plugin_type_init)(struct st_plugin_int *);
extern I_List<i_string> *opt_plugin_load_list_ptr;
extern char *opt_plugin_dir_ptr;
extern MYSQL_PLUGIN_IMPORT char opt_plugin_dir[FN_REFLEN];
extern const LEX_CSTRING plugin_type_names[];
extern ulong plugin_maturity;
extern TYPELIB plugin_maturity_values;
extern const char *plugin_maturity_names[];
extern int plugin_init(int *argc, char **argv, int init_flags);
extern void plugin_shutdown(void);
void add_plugin_options(DYNAMIC_ARRAY *options, MEM_ROOT *mem_root);
extern bool plugin_is_ready(const LEX_CSTRING *name, int type);
#define my_plugin_lock_by_name(A,B,C) plugin_lock_by_name(A,B,C)
#define my_plugin_lock(A,B) plugin_lock(A,B)
extern plugin_ref plugin_lock(THD *thd, plugin_ref ptr);
extern plugin_ref plugin_lock_by_name(THD *thd, const LEX_CSTRING *name,
int type);
extern void plugin_unlock(THD *thd, plugin_ref plugin);
extern void plugin_unlock_list(THD *thd, plugin_ref *list, uint count);
extern bool mysql_install_plugin(THD *thd, const LEX_CSTRING *name,
const LEX_CSTRING *dl);
extern bool mysql_uninstall_plugin(THD *thd, const LEX_CSTRING *name,
const LEX_CSTRING *dl);
extern bool plugin_register_builtin(struct st_mysql_plugin *plugin);
extern void plugin_thdvar_init(THD *thd);
extern void plugin_thdvar_cleanup(THD *thd);
sys_var *find_plugin_sysvar(st_plugin_int *plugin, st_mysql_sys_var *var);
void plugin_opt_set_limits(struct my_option *, const struct st_mysql_sys_var *);
extern SHOW_COMP_OPTION plugin_status(const char *name, size_t len, int type);
extern bool check_valid_path(const char *path, size_t length);
extern void plugin_mutex_init();
typedef my_bool (plugin_foreach_func)(THD *thd,
plugin_ref plugin,
void *arg);
#define plugin_foreach(A,B,C,D) plugin_foreach_with_mask(A,B,C,PLUGIN_IS_READY,D)
extern bool plugin_foreach_with_mask(THD *thd, plugin_foreach_func *func,
int type, uint state_mask, void *arg);
extern void sync_dynamic_session_variables(THD* thd, bool global_lock);
extern bool plugin_dl_foreach(THD *thd, const LEX_CSTRING *dl,
plugin_foreach_func *func, void *arg);
extern void sync_dynamic_session_variables(THD* thd, bool global_lock);
#endif
#ifdef WITH_WSREP
extern void wsrep_plugins_pre_init();
extern void wsrep_plugins_post_init();
#endif /* WITH_WSREP */
|
