aboutsummaryrefslogtreecommitdiff
path: root/src/datastore/gnunet-datastore.c
blob: 9daad04c7eec8a0aaa682ddf2d48ca29cc57613a (plain) (blame)
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
254
255
256
257
258
259
260
261
262
/*
     This file is part of GNUnet.
     (C) 2010, 2013 Christian Grothoff (and other contributing authors)

     GNUnet 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; either version 3, or (at your
     option) any later version.

     GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
*/

/**
 * @file datastore/gnunet-datastore.c
 * @brief tool to manipulate datastores
 * @author Christian Grothoff
 */
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_datastore_service.h"


/**
 * Name of the second configuration file.
 */
static char *alternative_cfg;

/**
 * Global return value.
 */
static int ret;

/**
 * Our offset on 'get'.
 */
static uint64_t offset;

/**
 * First UID ever returned.
 */
static uint64_t first_uid;

/**
 * Configuration for the source database.
 */
static struct GNUNET_CONFIGURATION_Handle *scfg;

/**
 * Handle for database source.
 */
static struct GNUNET_DATASTORE_Handle *db_src;

/**
 * Handle for database destination.
 */
static struct GNUNET_DATASTORE_Handle *db_dst;

/**
 * Current operation.
 */
static struct GNUNET_DATASTORE_QueueEntry *qe;


static void
do_shutdown (void *cls,
	     const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  if (NULL != qe)
    GNUNET_DATASTORE_cancel (qe);
  GNUNET_DATASTORE_disconnect (db_src, GNUNET_NO);
  GNUNET_DATASTORE_disconnect (db_dst, GNUNET_NO);
  GNUNET_CONFIGURATION_destroy (scfg);
}


/**
 * Perform next GET operation.
 */
static void
do_get (void);


/**
 * Continuation called to notify client about result of the
 * operation.
 *
 * @param cls closure
 * @param success GNUNET_SYSERR on failure (including timeout/queue drop)
 *                GNUNET_NO if content was already there
 *                GNUNET_YES (or other positive value) on success
 * @param min_expiration minimum expiration time required for 0-priority content to be stored
 *                by the datacache at this time, zero for unknown, forever if we have no
 *                space for 0-priority content
 * @param msg NULL on success, otherwise an error message
 */
static void
do_finish (void *cls,
	   int32_t success,
	   struct GNUNET_TIME_Absolute min_expiration,
	   const char *msg)
{
  qe = NULL;
  if (GNUNET_SYSERR == success)
  {
    fprintf (stderr,
	     _("Failed to store item: %s, aborting\n"),
	     msg);
    ret = 1;
    GNUNET_SCHEDULER_shutdown ();
    return;
  }
  do_get ();
}


/**
 * Process a datum that was stored in the datastore.
 *
 * @param cls closure
 * @param key key for the content
 * @param size number of bytes in data
 * @param data content stored
 * @param type type of the content
 * @param priority priority of the content
 * @param anonymity anonymity-level for the content
 * @param expiration expiration time for the content
 * @param uid unique identifier for the datum;
 *        maybe 0 if no unique identifier is available
 */
static void
do_put (void *cls,
	const struct GNUNET_HashCode *key,
	size_t size, const void *data,
	enum GNUNET_BLOCK_Type type,
	uint32_t priority,
	uint32_t anonymity,
	struct GNUNET_TIME_Absolute
	expiration, uint64_t uid)
{
  qe = NULL;
  if ( (0 != offset) &&
       (uid == first_uid) )
  {
    GNUNET_SCHEDULER_shutdown ();
    return;
  }
  if (0 == offset)
    first_uid = uid;
  qe = GNUNET_DATASTORE_put (db_dst, 0,
			     key, size, data, type,
			     priority, anonymity,
			     0 /* FIXME: replication is lost... */,
			     expiration,
			     0, 1, GNUNET_TIME_UNIT_FOREVER_REL,
			     &do_finish, NULL);
}


/**
 * Perform next GET operation.
 */
static void
do_get ()
{
  qe = GNUNET_DATASTORE_get_key (db_src,
				 offset,
				 NULL, GNUNET_BLOCK_TYPE_ANY,
				 0, 1,
				 GNUNET_TIME_UNIT_FOREVER_REL,
				 &do_put, NULL);
}



/**
 * Main function that will be run by the scheduler.
 *
 * @param cls closure
 * @param args remaining command-line arguments
 * @param cfgfile name of the configuration file used
 * @param cfg configuration -- for destination datastore
 */
static void
run (void *cls, char *const *args, const char *cfgfile,
     const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  if (NULL == alternative_cfg)
    return; /* nothing to be done */
  if (0 == strcmp (cfgfile, alternative_cfg))
  {
    fprintf (stderr,
	     _("Cannot use the same configuration for source and destination\n"));
    ret = 1;
    return;
  }
  scfg = GNUNET_CONFIGURATION_create ();
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_load (scfg,
				 alternative_cfg))
  {
    GNUNET_CONFIGURATION_destroy (scfg);
    ret = 1;
    return;
  }
  db_src = GNUNET_DATASTORE_connect (scfg);
  if (NULL == db_src)
  {
    GNUNET_CONFIGURATION_destroy (scfg);
    ret = 1;
    return;
  }
  db_dst = GNUNET_DATASTORE_connect (cfg);
  if (NULL == db_dst)
  {
    GNUNET_DATASTORE_disconnect (db_src, GNUNET_NO);
    GNUNET_CONFIGURATION_destroy (scfg);
    ret = 1;
    return;
  }
  GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
				&do_shutdown, NULL);
  do_get ();
}


/**
 * The main function to manipulate datastores.
 *
 * @param argc number of arguments from the command line
 * @param argv command line arguments
 * @return 0 ok, 1 on error
 */
int
main (int argc, char *const *argv)
{
  static const struct GNUNET_GETOPT_CommandLineOption options[] = {
    { 's', "sourcecfg", "FILENAME",
      gettext_noop ("specifies the configuration to use to access an alternative datastore; will merge that datastore into our current datastore"),
      1, &GNUNET_GETOPT_set_filename, &alternative_cfg },
    GNUNET_GETOPT_OPTION_END
  };
  if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
    return 2;

  if (GNUNET_OK !=
      GNUNET_PROGRAM_run (argc, argv, "gnunet-datastore",
			  gettext_noop ("Manipulate GNUnet datastore"),
			  options, &run, NULL))
    ret = 1;
  GNUNET_free ((void*) argv);
  return ret;
}

/* end of gnunet-datastore.c */