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https://github.com/samba-team/samba.git
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tdb: add -k option to tdbtorture
To test the case of death of a process during transaction commit, add
a -k (kill random) option to tdbtorture. The easiest way to do this
is to make every worker a child (unless there's only one child), which
is why this patch is bigger than you might expect.
Using -k without -t (always transactions) you expect corruption, though
it doesn't happen every time. With -t, we currently get corruption but
the next patch fixes that.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(Imported from commit ececeffd85)
(This used to be ctdb commit e5af0ce79c74f11daae2a8514e398c40535e2e67)
This commit is contained in:
Rusty Russell
parent
90480db96f
commit
5c58560d50
@ -30,6 +30,10 @@ static struct tdb_context *db;
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static int in_transaction;
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static int error_count;
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static int always_transaction = 0;
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static int hash_size = 2;
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static int loopnum;
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static int count_pipe;
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static struct tdb_logging_context log_ctx;
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#ifdef PRINTF_ATTRIBUTE
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static void tdb_log(struct tdb_context *tdb, enum tdb_debug_level level, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
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@ -48,8 +52,9 @@ static void tdb_log(struct tdb_context *tdb, enum tdb_debug_level level, const c
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va_end(ap);
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fflush(stdout);
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#if 0
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{
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if (level != TDB_DEBUG_TRACE) {
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char *ptr;
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signal(SIGUSR1, SIG_IGN);
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asprintf(&ptr,"xterm -e gdb /proc/%d/exe %d", getpid(), getpid());
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system(ptr);
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free(ptr);
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@ -211,73 +216,34 @@ static int traverse_fn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
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static void usage(void)
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{
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printf("Usage: tdbtorture [-t] [-n NUM_PROCS] [-l NUM_LOOPS] [-s SEED] [-H HASH_SIZE]\n");
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printf("Usage: tdbtorture [-t] [-k] [-n NUM_PROCS] [-l NUM_LOOPS] [-s SEED] [-H HASH_SIZE]\n");
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exit(0);
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}
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int main(int argc, char * const *argv)
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static void send_count_and_suicide(int sig)
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{
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int i, seed = -1;
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int num_procs = 3;
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int num_loops = 5000;
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int hash_size = 2;
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int c;
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extern char *optarg;
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pid_t *pids;
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/* This ensures our successor can continue where we left off. */
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write(count_pipe, &loopnum, sizeof(loopnum));
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/* This gives a unique signature. */
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kill(getpid(), SIGUSR2);
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}
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struct tdb_logging_context log_ctx;
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log_ctx.log_fn = tdb_log;
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while ((c = getopt(argc, argv, "n:l:s:H:th")) != -1) {
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switch (c) {
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case 'n':
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num_procs = strtol(optarg, NULL, 0);
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break;
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case 'l':
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num_loops = strtol(optarg, NULL, 0);
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break;
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case 'H':
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hash_size = strtol(optarg, NULL, 0);
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break;
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case 's':
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seed = strtol(optarg, NULL, 0);
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break;
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case 't':
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always_transaction = 1;
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break;
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default:
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usage();
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}
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}
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unlink("torture.tdb");
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pids = (pid_t *)calloc(sizeof(pid_t), num_procs);
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pids[0] = getpid();
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for (i=0;i<num_procs-1;i++) {
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if ((pids[i+1]=fork()) == 0) break;
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}
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db = tdb_open_ex("torture.tdb", hash_size, TDB_CLEAR_IF_FIRST,
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static int run_child(int i, int seed, unsigned num_loops, unsigned start)
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{
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db = tdb_open_ex("torture.tdb", hash_size, TDB_DEFAULT,
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O_RDWR | O_CREAT, 0600, &log_ctx, NULL);
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if (!db) {
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fatal("db open failed");
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}
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if (seed == -1) {
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seed = (getpid() + time(NULL)) & 0x7FFFFFFF;
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}
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if (i == 0) {
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printf("testing with %d processes, %d loops, %d hash_size, seed=%d%s\n",
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num_procs, num_loops, hash_size, seed, always_transaction ? " (all within transactions)" : "");
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}
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srand(seed + i);
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srandom(seed + i);
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for (i=0;i<num_loops && error_count == 0;i++) {
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/* Set global, then we're ready to handle being killed. */
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loopnum = start;
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signal(SIGUSR1, send_count_and_suicide);
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for (;loopnum<num_loops && error_count == 0;loopnum++) {
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addrec_db();
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}
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@ -301,44 +267,163 @@ static void usage(void)
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tdb_close(db);
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if (getpid() != pids[0]) {
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return error_count;
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return (error_count < 100 ? error_count : 100);
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}
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int main(int argc, char * const *argv)
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{
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int i, seed = -1;
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int num_loops = 5000;
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int num_procs = 3;
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int c, pfds[2];
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extern char *optarg;
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pid_t *pids;
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int kill_random = 0;
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int *done;
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log_ctx.log_fn = tdb_log;
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while ((c = getopt(argc, argv, "n:l:s:H:thk")) != -1) {
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switch (c) {
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case 'n':
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num_procs = strtol(optarg, NULL, 0);
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break;
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case 'l':
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num_loops = strtol(optarg, NULL, 0);
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break;
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case 'H':
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hash_size = strtol(optarg, NULL, 0);
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break;
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case 's':
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seed = strtol(optarg, NULL, 0);
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break;
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case 't':
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always_transaction = 1;
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break;
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case 'k':
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kill_random = 1;
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break;
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default:
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usage();
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}
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}
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for (i=1;i<num_procs;i++) {
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unlink("torture.tdb");
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if (seed == -1) {
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seed = (getpid() + time(NULL)) & 0x7FFFFFFF;
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}
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if (num_procs == 1 && !kill_random) {
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/* Don't fork for this case, makes debugging easier. */
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error_count = run_child(0, seed, num_loops, 0);
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goto done;
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}
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pids = (pid_t *)calloc(sizeof(pid_t), num_procs);
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done = (int *)calloc(sizeof(int), num_procs);
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if (pipe(pfds) != 0) {
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perror("Creating pipe");
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exit(1);
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}
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count_pipe = pfds[1];
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for (i=0;i<num_procs;i++) {
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if ((pids[i]=fork()) == 0) {
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close(pfds[0]);
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if (i == 0) {
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printf("testing with %d processes, %d loops, %d hash_size, seed=%d%s\n",
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num_procs, num_loops, hash_size, seed, always_transaction ? " (all within transactions)" : "");
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}
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exit(run_child(i, seed, num_loops, 0));
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}
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}
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while (num_procs) {
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int status, j;
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pid_t pid;
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if (error_count != 0) {
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/* try and stop the test on any failure */
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for (j=1;j<num_procs;j++) {
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for (j=0;j<num_procs;j++) {
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if (pids[j] != 0) {
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kill(pids[j], SIGTERM);
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}
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}
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}
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pid = waitpid(-1, &status, 0);
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pid = waitpid(-1, &status, kill_random ? WNOHANG : 0);
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if (pid == 0) {
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struct timespec ts;
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/* Sleep for 1/10 second. */
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ts.tv_sec = 0;
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ts.tv_nsec = 100000000;
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nanosleep(&ts, NULL);
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/* Kill someone. */
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kill(pids[random() % num_procs], SIGUSR1);
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continue;
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}
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if (pid == -1) {
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perror("failed to wait for child\n");
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exit(1);
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}
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for (j=1;j<num_procs;j++) {
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for (j=0;j<num_procs;j++) {
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if (pids[j] == pid) break;
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}
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if (j == num_procs) {
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printf("unknown child %d exited!?\n", (int)pid);
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exit(1);
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}
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if (WEXITSTATUS(status) != 0) {
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printf("child %d exited with status %d\n",
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(int)pid, WEXITSTATUS(status));
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if (WIFSIGNALED(status)) {
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if (WTERMSIG(status) == SIGUSR2
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|| WTERMSIG(status) == SIGUSR1) {
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/* SIGUSR2 means they wrote to pipe. */
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if (WTERMSIG(status) == SIGUSR2) {
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read(pfds[0], &done[j],
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sizeof(done[j]));
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}
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pids[j] = fork();
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if (pids[j] == 0)
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exit(run_child(j, seed, num_loops,
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done[j]));
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printf("Restarting child %i for %u-%u\n",
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j, done[j], num_loops);
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continue;
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}
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printf("child %d exited with signal %d\n",
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(int)pid, WTERMSIG(status));
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error_count++;
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} else {
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if (WEXITSTATUS(status) != 0) {
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printf("child %d exited with status %d\n",
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(int)pid, WEXITSTATUS(status));
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error_count++;
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}
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}
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pids[j] = 0;
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memmove(&pids[j], &pids[j+1],
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(num_procs - j - 1)*sizeof(pids[0]));
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num_procs--;
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}
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free(pids);
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done:
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if (error_count == 0) {
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db = tdb_open_ex("torture.tdb", hash_size, TDB_DEFAULT,
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O_RDWR, 0, &log_ctx, NULL);
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if (!db) {
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fatal("db open failed");
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}
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if (tdb_check(db, NULL, NULL) == -1) {
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printf("db check failed");
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exit(1);
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}
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tdb_close(db);
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printf("OK\n");
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}
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