summaryrefslogtreecommitdiff
path: root/source4/cluster/ctdb/tests/ctdb_fetch1.c
blob: b92e7fcda3273a1287a997466ca622bb41de6f65 (plain)
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
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
/* 
   simple ctdb fetch test

   Copyright (C) Andrew Tridgell  2006

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "includes.h"
#include "lib/events/events.h"
#include "system/filesys.h"
#include "popt.h"
#include "ctdb.h"
#include "ctdb_private.h"
#include "cmdline.h"
#include <sys/time.h>

#define PARENT_SRVID	0
#define CHILD1_SRVID	1
#define CHILD2_SRVID	2

int num_msg=0;

static struct timeval tp1,tp2;

static void start_timer(void)
{
	gettimeofday(&tp1,NULL);
}

static double end_timer(void)
{
	gettimeofday(&tp2,NULL);
	return (tp2.tv_sec + (tp2.tv_usec*1.0e-6)) - 
		(tp1.tv_sec + (tp1.tv_usec*1.0e-6));
}

static void message_handler(struct ctdb_context *ctdb, uint32_t srvid, 
			    TDB_DATA data, void *private_data)
{
	num_msg++;
}
static void child_handler(struct ctdb_context *ctdb, uint32_t srvid, 
			    TDB_DATA data, void *private_data)
{
	num_msg++;
}

void test1(struct ctdb_db_context *ctdb_db)
{
	TDB_DATA key, data, data2, store_data;
	int ret;
	struct ctdb_record_handle *h;
 
	/* 
	   test 1 : write data and read it back.   should all be the same
	 */
	printf("Test1: write and verify we can read it back: ");
	key.dptr  = discard_const("Record");
	key.dsize = strlen((const char *)key.dptr)+1;
	h = ctdb_fetch_lock(ctdb_db, ctdb_db, key, &data);
	if (h == NULL) {
		printf("test1: ctdb_fetch_lock() failed\n");
		exit(1);
	}

	store_data.dptr  = discard_const("data to store");
	store_data.dsize = strlen((const char *)store_data.dptr)+1;
	ret = ctdb_record_store(h, store_data);
	talloc_free(h);
	if (ret!=0) {
		printf("test1: ctdb_record_store() failed\n");
		exit(1);
	}

	h = ctdb_fetch_lock(ctdb_db, ctdb_db, key, &data2);
	if (h == NULL) {
		printf("test1: ctdb_fetch_lock() failed\n");
		exit(1);
	}

	/* hopefully   data2 will now contain the record written above */
	if (!strcmp("data to store", (const char *)data2.dptr)) {
		printf("SUCCESS\n");
	} else {
		printf("FAILURE\n");
		exit(10);
	}
	
	/* just write it back to unlock it */
	ret = ctdb_record_store(h, store_data);
	talloc_free(h);
	if (ret!=0) {
		printf("test1: ctdb_record_store() failed\n");
		exit(1);
	}
}

void child(int srvid, struct event_context *ev, struct ctdb_context *ctdb, struct ctdb_db_context *ctdb_db)
{
	TDB_DATA data;
	TDB_DATA key, data2;
	struct ctdb_record_handle *h;

	data.dptr=discard_const("dummy message");
	data.dsize=strlen((const char *)data.dptr)+1;

	ctdb_set_message_handler(ctdb, srvid, child_handler, NULL);

	ctdb_send_message(ctdb, ctdb_get_vnn(ctdb), PARENT_SRVID, data);
	while (num_msg==0) {
		event_loop_once(ev);
	}


	/* fetch and lock the record */
	key.dptr  = discard_const("Record");
	key.dsize = strlen((const char *)key.dptr)+1;
	printf("client:%d fetching the record\n",srvid);
	h = ctdb_fetch_lock(ctdb_db, ctdb_db, key, &data2);
	printf("client:%d the record is fetched and locked\n",srvid);
	if (h == NULL) {
		printf("client: ctdb_fetch_lock() failed\n");
		exit(1);
	}
	ctdb_send_message(ctdb, ctdb_get_vnn(ctdb), PARENT_SRVID, data);

	/* wait until parent tells us to release the lock */
	while (num_msg==1) {
		event_loop_once(ev);
	}

	printf("child %d terminating\n",srvid);
	exit(10);
	   
}

/*
  main program
*/
int main(int argc, const char *argv[])
{
	struct ctdb_context *ctdb;
	struct ctdb_db_context *ctdb_db;
	TDB_DATA data;

	struct poptOption popt_options[] = {
		POPT_AUTOHELP
		POPT_CTDB_CMDLINE
		POPT_TABLEEND
	};
	int opt;
	const char **extra_argv;
	int extra_argc = 0;
	int ret;
	poptContext pc;
	struct event_context *ev;

	pc = poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_KEEP_FIRST);

	while ((opt = poptGetNextOpt(pc)) != -1) {
		switch (opt) {
		default:
			fprintf(stderr, "Invalid option %s: %s\n", 
				poptBadOption(pc, 0), poptStrerror(opt));
			exit(1);
		}
	}

	/* setup the remaining options for the main program to use */
	extra_argv = poptGetArgs(pc);
	if (extra_argv) {
		extra_argv++;
		while (extra_argv[extra_argc]) extra_argc++;
	}

	ev = event_context_init(NULL);

	/* initialise ctdb */
	ctdb = ctdb_cmdline_init(ev);
	if (ctdb == NULL) {
		printf("Failed to init ctdb\n");
		exit(1);
	}

	/* attach to a specific database */
	ctdb_db = ctdb_attach(ctdb, "test.tdb", TDB_DEFAULT, O_RDWR|O_CREAT|O_TRUNC, 0666);
	if (!ctdb_db) {
		printf("ctdb_attach failed - %s\n", ctdb_errstr(ctdb));
		exit(1);
	}

	/* start the protocol running */
	ret = ctdb_start(ctdb);

#if 0
	/* wait until all nodes are connected (should not be needed
	   outside of test code) */
	ctdb_connect_wait(ctdb);
#endif

	/*
	   start two child processes
	 */
	if(fork()){
		/* 
		   set up a message handler so our child processes can talk to us
		 */
		ctdb_set_message_handler(ctdb, PARENT_SRVID, message_handler, NULL);
	} else {
		sleep(3);
		if(!fork()){
			child(CHILD1_SRVID, ev, ctdb, ctdb_db);
		} else {
			child(CHILD2_SRVID, ev, ctdb, ctdb_db);
		}
	}

	/* 
	   test 1 : write data and read it back.
	 */
	test1(ctdb_db); 

	/* 
	   wait until both children have sent us a message they have started
	 */
	printf("Wait for both child processes to start: ");
	while (num_msg!=2) {
		event_loop_once(ev);
	}
	printf("STARTED\n");


	/*
	   send message to child 1 to make it to fetch and lock the record 
	 */
	data.dptr=discard_const("dummy message");
	data.dsize=strlen((const char *)data.dptr)+1;
	ctdb_send_message(ctdb, ctdb_get_vnn(ctdb), CHILD1_SRVID, data);

	/* wait for child 1 to complete fetching and locking the record */
	while (num_msg!=3) {
		event_loop_once(ev);
	}

	/* now tell child 2 to fetch and lock the same record */
	ctdb_send_message(ctdb, ctdb_get_vnn(ctdb), CHILD2_SRVID, data);

	/* wait a while for child 2 to complete fetching and locking the 
	   record, this should fail since the record is already locked
	   by the first child */
	start_timer();
	while ( (end_timer() < 1.0) && (num_msg!=4) ) {
		event_loop_once(ev);
	}
	if (num_msg!=4) {
		printf("Child 2 did not get the lock since it is held by client 1:SUCCESS\n");
	} else {
		printf("Child 2 did get the lock:FAILURE\n");
		exit(10);
	}

	/* send message to child 1 to terminate, which should let child 2
	   get the lock.
	 */
	ctdb_send_message(ctdb, ctdb_get_vnn(ctdb), CHILD1_SRVID, data);


	/* wait for a final message from child 2 it has received the lock
	   which indicates success */
	while (num_msg!=4) {
		event_loop_once(ev);
	}
	printf("child 2 aquired the lock after child 1 terminated:SUCCESS\n");

	/* send a message to child 2 to tell it to terminate too */
	ctdb_send_message(ctdb, ctdb_get_vnn(ctdb), CHILD2_SRVID, data);


	printf("Test was SUCCESSFUL\n");

	/* shut it down */
	talloc_free(ctdb);
	return 0;
}