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
|
/*
Copyright (c) 2015 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 __GFDB_DATA_STORE_H
#define __GFDB_DATA_STORE_H
#include "glusterfs.h"
#include "xlator.h"
#include "logging.h"
#include "common-utils.h"
#include <time.h>
#include <sys/time.h>
#include "gfdb_data_store_types.h"
/* GFDB Connection Node:
* ~~~~~~~~~~~~~~~~~~~~
* Represents the connection to the database while using libgfdb
* The connection node is not thread safe as far as fini_db is concerned.
* You can use a single connection node
* to do multithreaded db operations like insert/delete/find of records.
* But you need to wait for all the operating threads to complete i.e
* pthread_join() and then do fini_db() to kill the connection node.
* gfdb_conn_node_t is an opaque structure.
* */
typedef struct gfdb_conn_node_t gfdb_conn_node_t;
/*Libgfdb API Function: Used to initialize db connection
* Arguments:
* args : Dictionary containing database specific parameters
* eg: For sqlite3, pagesize, cachesize, db name, db path
etc
* gfdb_db_type : Type of data base used i.e sqlite or hyperdex etc
* Returns : if successful return the GFDB Connection Node to the caller or
* NULL value in case of failure*/
gfdb_conn_node_t *
init_db(dict_t *arg, gfdb_db_type_t db_type);
typedef gfdb_conn_node_t * (*init_db_t) (dict_t *args,
gfdb_db_type_t gfdb_db_type);
/*Libgfdb API Function: Used to terminate/de-initialize db connection
* (Destructor function for db connection object)
* Arguments:
* _conn_node : DB Connection Index of the DB Connection
* Returns : if successful return 0 or
* -ve value in case of failure*/
int
fini_db(gfdb_conn_node_t *);
typedef int (*fini_db_t) (gfdb_conn_node_t *_conn_node);
/*Libgfdb API Function: Used to insert/updated records in the database
* NOTE: In current gfdb_sqlite plugin we use that
* same function to delete the record. Set the
* gfdb_fop_path to GFDB_FOP_UNDEL to delete the
* link of inode from GF_FLINK_TB and
* GFDB_FOP_UNDEL_ALL to delete all the records from
* GF_FLINK_TB and GF_FILE_TB.
* TODO: Should seperate this function into the
* delete_record function
* Refer CTR Xlator features/changetimerecorder for usage
* Arguments:
* _conn_node : GFDB Connection node
* gfdb_db_record : Record to be inserted/updated
* Returns : if successful return 0 or
* -ve value in case of failure*/
int
insert_record(gfdb_conn_node_t *, gfdb_db_record_t *gfdb_db_record);
/*Libgfdb API Function: Used to delete record from the database
* NOTE: In the current gfdb_sqlite3 plugin
* implementation this function is dummy.
* Use the insert_record function.
* Refer CTR Xlator features/changetimerecorder for usage
* Arguments:
* _conn_node : GFDB Connection node
* gfdb_db_record : Record to be deleted
* Returns : if successful return 0 or
* -ve value in case of failure*/
int
delete_record(gfdb_conn_node_t *, gfdb_db_record_t *gfdb_db_record);
/*Libgfdb API Function: Query all the records from the database
* Arguments:
* _conn_node : GFDB Connection node
* query_callback : Call back function that will be called
* for every record found
* _query_cbk_args : Custom argument passed for the call back
* function query_callback
* Returns : if successful return 0 or
* -ve value in case of failure*/
int find_all(gfdb_conn_node_t *, gf_query_callback_t query_callback,
void *_query_cbk_args);
/*Libgfdb API Function: Query records/files that have not changed/accessed
* from a time in past to current time
* Arguments:
* _conn_node : GFDB Connection node
* query_callback : Call back function that will be called
* for every record found
* _query_cbk_args : Custom argument passed for the call back
* function query_callback
* for_time : Time from where the file/s are not
* changed/accessed
* Returns : if successful return 0 or
* -ve value in case of failure*/
int find_unchanged_for_time(gfdb_conn_node_t *,
gf_query_callback_t query_callback,
void *_query_cbk_args, gfdb_time_t *for_time);
typedef int (*find_unchanged_for_time_t) (gfdb_conn_node_t *_conn_node,
gf_query_callback_t query_callback,
void *_query_cbk_args,
gfdb_time_t *for_time);
/*Libgfdb API Function: Query records/files that have changed/accessed from a
* time in past to current time
* Arguments:
* _conn_node : GFDB Connection node
* query_callback : Call back function that will be called
* for every record found
* _query_cbk_args : Custom argument passed for the call back
* function query_callback
* for_time : Time from where the file/s are
* changed/accessed
* Returns : if successful return 0 or
* -ve value in case of failure*/
int find_recently_changed_files(gfdb_conn_node_t *_conn,
gf_query_callback_t query_callback, void *_query_cbk_args,
gfdb_time_t *from_time);
typedef int (*find_recently_changed_files_t) (gfdb_conn_node_t *_conn_node,
gf_query_callback_t query_callback,
void *_query_cbk_args,
gfdb_time_t *from_time);
/*Libgfdb API Function: Query records/files that have not changed/accessed
* from a time in past to current time, with
* a desired frequency
* Arguments:
* _conn_node : GFDB Connection node
* query_callback : Call back function that will be called
* for every record found
* _query_cbk_args : Custom argument passed for the call back
* function query_callback
* for_time : Time from where the file/s are not
* changed/accessed
* write_freq_thresold : Desired Write Frequency lower limit
* read_freq_thresold : Desired Read Frequency lower limit
* _clear_counters : If true, Clears all the frequency counters of
* all files.
* Returns : if successful return 0 or
* -ve value in case of failure*/
int find_unchanged_for_time_freq(gfdb_conn_node_t *_conn,
gf_query_callback_t query_callback,
void *_query_cbk_args,
gfdb_time_t *for_time,
int write_freq_thresold,
int read_freq_thresold,
gf_boolean_t _clear_counters);
typedef int (*find_unchanged_for_time_freq_t) (gfdb_conn_node_t *_conn_node,
gf_query_callback_t query_callback,
void *_query_cbk_args,
gfdb_time_t *for_time,
int write_freq_thresold,
int read_freq_thresold,
gf_boolean_t _clear_counters);
/*Libgfdb API Function: Query records/files that have changed/accessed from a
* time in past to current time, with
* a desired frequency
* Arguments:
* _conn_node : GFDB Connection node
* query_callback : Call back function that will be called
* for every record found
* _query_cbk_args : Custom argument passed for the call back
* function query_callback
* for_time : Time from where the file/s are
* changed/accessed
* write_freq_thresold : Desired Write Frequency lower limit
* read_freq_thresold : Desired Read Frequency lower limit
* _clear_counters : If true, Clears all the frequency counters of
* all files.
* Returns : if successful return 0 or
* -ve value in case of failure*/
int find_recently_changed_files_freq(gfdb_conn_node_t *_conn,
gf_query_callback_t query_callback,
void *_query_cbk_args,
gfdb_time_t *from_time,
int write_freq_thresold,
int read_freq_thresold,
gf_boolean_t _clear_counters);
typedef int (*find_recently_changed_files_freq_t) (gfdb_conn_node_t *_conn_node,
gf_query_callback_t query_callback,
void *_query_cbk_args,
gfdb_time_t *from_time,
int write_freq_thresold,
int read_freq_thresold,
gf_boolean_t _clear_counters);
typedef struct gfdb_methods_s {
init_db_t init_db;
fini_db_t fini_db;
find_unchanged_for_time_t find_unchanged_for_time;
find_recently_changed_files_t find_recently_changed_files;
find_unchanged_for_time_freq_t find_unchanged_for_time_freq;
find_recently_changed_files_freq_t find_recently_changed_files_freq;
char *dbpath;
} gfdb_methods_t;
void get_gfdb_methods (gfdb_methods_t *methods);
typedef void (*get_gfdb_methods_t) (gfdb_methods_t *methods);
#endif
|
