s3: add dbwrap_torture - a tool to stress test tdb transactions through dbwrap

This can be used to also test tdb transactions on clustered installations
throught ctdb. The test is modeled after the ctdb_transaction.c test program
from the ctdb source code. It runs transactions in a tight loop on a test
database called "transactions.tdb" (by default), increasing a counter in each
iteration. In a clustered environment, a counter is maintained for each node.

Michael

1 files changed, 350 insertions, 0 deletions

diff --git a/source3/utils/dbwrap_torture.c b/source3/utils/dbwrap_torture.c
new file mode 100644
index 0000000000..2077eea567
--- /dev/null
+++ b/source3/utils/dbwrap_torture.c
@@ -0,0 +1,350 @@
+/*
+   Samba Linux/Unix CIFS implementation
+
+   simple tool to test persistent databases
+
+   Copyright (C) Michael Adam     2009
+
+   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; either version 3 of the License, or
+   (at your option) any later version.
+
+   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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+
+#if 0
+#include "lib/events/events.h"
+#include "system/filesys.h"
+#include "popt.h"
+#include "cmdline.h"
+
+#include <sys/time.h>
+#include <time.h>
+#endif
+
+extern bool AllowDebugChange;
+
+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));
+}
+
+#define DEFAULT_DB_NAME "transaction.tdb"
+
+static int timelimit = 10;
+static int delay = 0;
+static int verbose = 0;
+static int no_trans = 0;
+static char *db_name = (char *)discard_const(DEFAULT_DB_NAME);
+
+
+static unsigned int pnn;
+
+static TDB_DATA old_data;
+
+static int success = true;
+
+static void print_counters(void)
+{
+	int i;
+	uint32_t *old_counters;
+
+	printf("[%4u] Counters: ", getpid());
+	old_counters = (uint32_t *)old_data.dptr;
+	for (i=0; i < old_data.dsize/sizeof(uint32_t); i++) {
+		printf("%6u ", old_counters[i]);
+	}
+	printf("\n");
+}
+
+static void each_second(struct tevent_context *ev,
+			struct tevent_timer *te,
+			struct timeval t,
+			void *private_data)
+{
+	struct db_context *db = talloc_get_type(private_data, struct db_context);
+
+	print_counters();
+
+	tevent_add_timer(ev, db, timeval_current_ofs(1, 0), each_second, db);
+}
+
+static bool check_counters(struct db_context *db, TDB_DATA data)
+{
+	int i;
+	uint32_t *counters, *old_counters;
+
+	counters     = (uint32_t *)data.dptr;
+	old_counters = (uint32_t *)old_data.dptr;
+
+	/* check that all the counters are monotonic increasing */
+	for (i=0; i < old_data.dsize/sizeof(uint32_t); i++) {
+		if (counters[i] < old_counters[i]) {
+			printf("[%4u] ERROR: counters has decreased for node %u  From %u to %u\n",
+			       getpid(), i, old_counters[i], counters[i]);
+			success = false;
+			return false;
+		}
+	}
+
+	if (old_data.dsize != data.dsize) {
+		old_data.dsize = data.dsize;
+		old_data.dptr = (unsigned char*)talloc_realloc_size(db, old_data.dptr, old_data.dsize);
+	}
+
+	memcpy(old_data.dptr, data.dptr, data.dsize);
+	if (verbose) print_counters();
+
+	return true;
+}
+
+
+static void do_sleep(unsigned int sec)
+{
+	unsigned int i;
+
+	if (sec == 0) {
+		return;
+	}
+
+	for (i=0; i<sec; i++) {
+		if (verbose) printf(".");
+		sleep(1);
+	}
+
+	if (verbose) printf("\n");
+}
+
+static void test_store_records(struct db_context *db, struct tevent_context *ev)
+{
+	TDB_DATA key;
+	uint32_t *counters;
+	TALLOC_CTX *tmp_ctx = talloc_stackframe();
+
+	key.dptr = (unsigned char *)discard_const("testkey");
+	key.dsize = strlen((const char *)key.dptr)+1;
+
+	start_timer();
+	while ((timelimit == 0) || (end_timer() < timelimit)) {
+		struct db_record *rec;
+		TDB_DATA data;
+		int ret;
+		NTSTATUS status;
+
+		if (!no_trans) {
+			if (verbose) DEBUG(1, ("starting transaction\n"));
+			ret = db->transaction_start(db);
+			if (ret != 0) {
+				DEBUG(0, ("Failed to start transaction on node "
+					  "%d\n", pnn));
+				goto fail;
+			}
+			if (verbose) DEBUG(1, ("transaction started\n"));
+			do_sleep(delay);
+		}
+
+		if (verbose) DEBUG(1, ("calling fetch_lock\n"));
+		rec = db->fetch_locked(db, tmp_ctx, key);
+		if (rec == NULL) {
+			DEBUG(0, ("Failed to fetch record\n"));
+			goto fail;
+		}
+		if (verbose) DEBUG(1, ("fetched record ok\n"));
+		do_sleep(delay);
+
+		data.dsize = MAX(rec->value.dsize, sizeof(uint32_t) * (pnn+1));
+		data.dptr = (unsigned char *)talloc_zero_size(tmp_ctx,
+							      data.dsize);
+		if (data.dptr == NULL) {
+			DEBUG(0, ("Failed to allocate data\n"));
+			goto fail;
+		}
+		memcpy(data.dptr, rec->value.dptr,rec->value.dsize);
+
+		counters = (uint32_t *)data.dptr;
+
+		/* bump our counter */
+		counters[pnn]++;
+
+		if (verbose) DEBUG(1, ("storing data\n"));
+		status = rec->store(rec, data, TDB_REPLACE);
+		if (!NT_STATUS_IS_OK(status)) {
+			DEBUG(0, ("Failed to store record\n"));
+			if (!no_trans) {
+				ret = db->transaction_cancel(db);
+				if (ret != 0) {
+					DEBUG(0, ("Error cancelling transaction.\n"));
+				}
+			}
+			goto fail;
+		}
+		talloc_free(rec);
+		if (verbose) DEBUG(1, ("stored data ok\n"));
+		do_sleep(delay);
+
+		if (!no_trans) {
+			if (verbose) DEBUG(1, ("calling transaction_commit\n"));
+			ret = db->transaction_commit(db);
+			if (ret != 0) {
+				DEBUG(0, ("Failed to commit transaction\n"));
+				goto fail;
+			}
+			if (verbose) DEBUG(1, ("transaction committed\n"));
+		}
+
+		/* store the counters and verify that they are sane */
+		if (verbose || (pnn == 0)) {
+			if (!check_counters(db, data)) {
+				goto fail;
+			}
+		}
+		talloc_free(data.dptr);
+
+		do_sleep(delay);
+	}
+
+	goto done;
+
+fail:
+	success = false;
+
+done:
+	talloc_free(tmp_ctx);
+	return;
+}
+
+/*
+  main program
+*/
+int main(int argc, const char *argv[])
+{
+	TALLOC_CTX *mem_ctx;
+	struct tevent_context *ev_ctx;
+	struct messaging_context *msg_ctx;
+	struct db_context *db;
+
+	int unsafe_writes = 0;
+	struct poptOption popt_options[] = {
+		POPT_AUTOHELP
+		POPT_COMMON_SAMBA
+		{ "timelimit", 't', POPT_ARG_INT, &timelimit, 0, "timelimit", "INTEGER" },
+		{ "delay", 'D', POPT_ARG_INT, &delay, 0, "delay (in seconds) between operations", "INTEGER" },
+		{ "verbose", 'v', POPT_ARG_NONE,  &verbose, 0, "switch on verbose mode", NULL },
+		{ "db-name", 'N', POPT_ARG_STRING, &db_name, 0, "name of the test db", "NAME" },
+		{ "no-trans", 'n', POPT_ARG_NONE, &no_trans, 0, "use fetch_lock/record store instead of transactions", NULL },
+		{ "unsafe-writes", 'u', POPT_ARG_NONE, &unsafe_writes, 0, "do not use tdb transactions when writing", NULL },
+		POPT_TABLEEND
+	};
+	int opt;
+	const char **extra_argv;
+	int extra_argc = 0;
+	poptContext pc;
+	int tdb_flags;
+
+	int ret = 1;
+
+	mem_ctx = talloc_stackframe();
+
+	if (verbose) {
+		setbuf(stdout, (char *)NULL); /* don't buffer */
+	} else {
+		setlinebuf(stdout);
+	}
+
+	DEBUGLEVEL_CLASS[DBGC_ALL] = 0;
+
+	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));
+			goto done;
+		}
+	}
+
+	/* 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++;
+	}
+
+	load_case_tables();
+	dbf = x_stderr;
+	AllowDebugChange = false;
+	lp_load(get_dyn_CONFIGFILE(), true, false, false, true);
+
+	ev_ctx = tevent_context_init(mem_ctx);
+	if (ev_ctx == NULL) {
+		d_fprintf(stderr, "ERROR: could not init event context\n");
+		goto done;
+	}
+
+	msg_ctx = messaging_init(mem_ctx, server_id_self(), ev_ctx);
+	if (msg_ctx == NULL) {
+		d_fprintf(stderr, "ERROR: could not init messaging context\n");
+		goto done;
+	}
+
+	if (unsafe_writes == 1) {
+		tdb_flags = TDB_NOSYNC;
+	} else {
+		tdb_flags = TDB_DEFAULT;
+	}
+
+	db = db_open(mem_ctx, db_name, 0, tdb_flags,  O_RDWR | O_CREAT, 0644);
+
+	if (db == NULL) {
+		d_fprintf(stderr, "failed to open db '%s': %s\n", db_name,
+			  strerror(errno));
+		goto done;
+	}
+
+	if (get_my_vnn() == NONCLUSTER_VNN) {
+		set_my_vnn(0);
+	}
+	pnn = get_my_vnn();
+
+	printf("Starting test on node %u. running for %u seconds. "
+	       "sleep delay: %u seconds.\n", pnn, timelimit, delay);
+
+	if (!verbose && (pnn == 0)) {
+		tevent_add_timer(ev_ctx, db, timeval_current_ofs(1, 0), each_second, db);
+	}
+
+	test_store_records(db, ev_ctx);
+
+	if (verbose || (pnn == 0)) {
+		if (success != true) {
+			printf("The test FAILED\n");
+			ret = 2;
+		} else {
+			printf("SUCCESS!\n");
+			ret = 0;
+		}
+	}
+
+done:
+	talloc_free(mem_ctx);
+	return ret;
+}