ccan/ntdb: demote to junkcode.
[ccan] / junkcode / rusty@rustcorp.com.au-ntdb / tools / ntdbtorture.c
1 /* this tests ntdb by doing lots of ops from several simultaneous
2    writers - that stresses the locking code.
3 */
4
5 #include "config.h"
6 #include "ntdb.h"
7 #include "private.h"
8 #include <ccan/err/err.h>
9
10 //#define REOPEN_PROB 30
11 #define DELETE_PROB 8
12 #define STORE_PROB 4
13 #define APPEND_PROB 6
14 #define TRANSACTION_PROB 10
15 #define TRANSACTION_PREPARE_PROB 2
16 #define LOCKSTORE_PROB 5
17 #define TRAVERSE_PROB 20
18 #define TRAVERSE_MOD_PROB 100
19 #define TRAVERSE_ABORT_PROB 500
20 #define CULL_PROB 100
21 #define KEYLEN 3
22 #define DATALEN 100
23
24 static struct ntdb_context *db;
25 static int in_transaction;
26 static int in_traverse;
27 static int error_count;
28 #if TRANSACTION_PROB
29 static int always_transaction = 0;
30 #endif
31 static int loopnum;
32 static int count_pipe;
33 static union ntdb_attribute log_attr;
34 static union ntdb_attribute seed_attr;
35 static union ntdb_attribute hsize_attr;
36
37 static void ntdb_log(struct ntdb_context *ntdb,
38                     enum ntdb_log_level level,
39                     enum NTDB_ERROR ecode,
40                     const char *message,
41                     void *data)
42 {
43         printf("ntdb:%s:%s:%s\n",
44                ntdb_name(ntdb), ntdb_errorstr(ecode), message);
45         fflush(stdout);
46 #if 0
47         {
48                 char str[200];
49                 signal(SIGUSR1, SIG_IGN);
50                 sprintf(str,"xterm -e gdb /proc/%u/exe %u", (unsigned int)getpid(), (unsigned int)getpid());
51                 system(str);
52         }
53 #endif
54 }
55
56 #include "../private.h"
57
58 static void segv_handler(int sig, siginfo_t *info, void *p)
59 {
60         char string[100];
61
62         sprintf(string, "%u: death at %p (map_ptr %p, map_size %zu)\n",
63                 (unsigned int)getpid(), info->si_addr, db->file->map_ptr,
64                 (size_t)db->file->map_size);
65         if (write(2, string, strlen(string)) > 0)
66                 sleep(60);
67         _exit(11);
68 }
69
70 static void warn_on_err(enum NTDB_ERROR e, struct ntdb_context *ntdb,
71                         const char *why)
72 {
73         if (e != NTDB_SUCCESS) {
74                 fprintf(stderr, "%u:%s:%s\n", (unsigned int)getpid(), why,
75                         ntdb ? ntdb_errorstr(e) : "(no ntdb)");
76                 error_count++;
77         }
78 }
79
80 static char *randbuf(int len)
81 {
82         char *buf;
83         int i;
84         buf = (char *)malloc(len+1);
85         if (buf == NULL) {
86                 perror("randbuf: unable to allocate memory for buffer.\n");
87                 exit(1);
88         }
89
90         for (i=0;i<len;i++) {
91                 buf[i] = 'a' + (rand() % 26);
92         }
93         buf[i] = 0;
94         return buf;
95 }
96
97 static void addrec_db(void);
98 static int modify_traverse(struct ntdb_context *ntdb, NTDB_DATA key, NTDB_DATA dbuf,
99                            void *state)
100 {
101 #if CULL_PROB
102         if (random() % CULL_PROB == 0) {
103                 ntdb_delete(ntdb, key);
104         }
105 #endif
106
107 #if TRAVERSE_MOD_PROB
108         if (random() % TRAVERSE_MOD_PROB == 0) {
109                 addrec_db();
110         }
111 #endif
112
113 #if TRAVERSE_ABORT_PROB
114         if (random() % TRAVERSE_ABORT_PROB == 0)
115                 return 1;
116 #endif
117
118         return 0;
119 }
120
121 static void addrec_db(void)
122 {
123         int klen, dlen;
124         char *k, *d;
125         NTDB_DATA key, data;
126         enum NTDB_ERROR e;
127
128         klen = 1 + (rand() % KEYLEN);
129         dlen = 1 + (rand() % DATALEN);
130
131         k = randbuf(klen);
132         d = randbuf(dlen);
133
134         key.dptr = (unsigned char *)k;
135         key.dsize = klen+1;
136
137         data.dptr = (unsigned char *)d;
138         data.dsize = dlen+1;
139
140 #if REOPEN_PROB
141         if (in_traverse == 0 && in_transaction == 0 && random() % REOPEN_PROB == 0) {
142                 ntdb_reopen_all(0);
143                 goto next;
144         }
145 #endif
146
147 #if TRANSACTION_PROB
148         if (in_traverse == 0 && in_transaction == 0 && (always_transaction || random() % TRANSACTION_PROB == 0)) {
149                 e = ntdb_transaction_start(db);
150                 warn_on_err(e, db, "ntdb_transaction_start failed");
151                 in_transaction++;
152                 goto next;
153         }
154         if (in_traverse == 0 && in_transaction && random() % TRANSACTION_PROB == 0) {
155                 if (random() % TRANSACTION_PREPARE_PROB == 0) {
156                         e = ntdb_transaction_prepare_commit(db);
157                         warn_on_err(e, db, "ntdb_transaction_prepare_commit failed");
158                 }
159                 e = ntdb_transaction_commit(db);
160                 warn_on_err(e, db, "ntdb_transaction_commit failed");
161                 in_transaction--;
162                 goto next;
163         }
164
165         if (in_traverse == 0 && in_transaction && random() % TRANSACTION_PROB == 0) {
166                 ntdb_transaction_cancel(db);
167                 in_transaction--;
168                 goto next;
169         }
170 #endif
171
172 #if DELETE_PROB
173         if (random() % DELETE_PROB == 0) {
174                 ntdb_delete(db, key);
175                 goto next;
176         }
177 #endif
178
179 #if STORE_PROB
180         if (random() % STORE_PROB == 0) {
181                 e = ntdb_store(db, key, data, NTDB_REPLACE);
182                 warn_on_err(e, db, "ntdb_store failed");
183                 goto next;
184         }
185 #endif
186
187 #if APPEND_PROB
188         if (random() % APPEND_PROB == 0) {
189                 e = ntdb_append(db, key, data);
190                 warn_on_err(e, db, "ntdb_append failed");
191                 goto next;
192         }
193 #endif
194
195 #if LOCKSTORE_PROB
196         if (random() % LOCKSTORE_PROB == 0) {
197                 ntdb_chainlock(db, key);
198                 if (ntdb_fetch(db, key, &data) != NTDB_SUCCESS) {
199                         data.dsize = 0;
200                         data.dptr = NULL;
201                 }
202                 e = ntdb_store(db, key, data, NTDB_REPLACE);
203                 warn_on_err(e, db, "ntdb_store failed");
204                 if (data.dptr) free(data.dptr);
205                 ntdb_chainunlock(db, key);
206                 goto next;
207         }
208 #endif
209
210 #if TRAVERSE_PROB
211         /* FIXME: recursive traverses break transactions? */
212         if (in_traverse == 0 && random() % TRAVERSE_PROB == 0) {
213                 in_traverse++;
214                 ntdb_traverse(db, modify_traverse, NULL);
215                 in_traverse--;
216                 goto next;
217         }
218 #endif
219
220         if (ntdb_fetch(db, key, &data) == NTDB_SUCCESS)
221                 free(data.dptr);
222
223 next:
224         free(k);
225         free(d);
226 }
227
228 static int traverse_fn(struct ntdb_context *ntdb, NTDB_DATA key, NTDB_DATA dbuf,
229                        void *state)
230 {
231         ntdb_delete(ntdb, key);
232         return 0;
233 }
234
235 static void usage(void)
236 {
237         printf("Usage: ntdbtorture"
238 #if TRANSACTION_PROB
239                " [-t]"
240 #endif
241                " [-k] [-n NUM_PROCS] [-l NUM_LOOPS] [-s SEED] [-S] [-H HASH_SIZE]\n");
242         exit(0);
243 }
244
245 static void send_count_and_suicide(int sig)
246 {
247         /* This ensures our successor can continue where we left off. */
248         if (write(count_pipe, &loopnum, sizeof(loopnum)) != sizeof(loopnum))
249                 exit(2);
250         /* This gives a unique signature. */
251         kill(getpid(), SIGUSR2);
252 }
253
254 static int run_child(const char *filename, int i, int seed, unsigned num_loops,
255                      unsigned start, int ntdb_flags)
256 {
257         struct sigaction act = { .sa_sigaction = segv_handler,
258                                  .sa_flags = SA_SIGINFO };
259         sigaction(11, &act, NULL);
260
261         db = ntdb_open(filename, ntdb_flags, O_RDWR | O_CREAT, 0600,
262                       &log_attr);
263         if (!db) {
264                 fprintf(stderr, "%u:%s:%s\n", (unsigned int)getpid(), filename,
265                         "db open failed");
266                 exit(1);
267         }
268
269 #if 0
270         if (i == 0) {
271                 printf("pid %u\n", (unsigned int)getpid());
272                 sleep(9);
273         } else
274                 sleep(10);
275 #endif
276
277         srand(seed + i);
278         srandom(seed + i);
279
280         /* Set global, then we're ready to handle being killed. */
281         loopnum = start;
282         signal(SIGUSR1, send_count_and_suicide);
283
284         for (;loopnum<num_loops && error_count == 0;loopnum++) {
285                 addrec_db();
286         }
287
288         if (error_count == 0) {
289                 enum NTDB_ERROR e;
290
291                 ntdb_traverse(db, NULL, NULL);
292 #if TRANSACTION_PROB
293                 if (always_transaction) {
294                         while (in_transaction) {
295                                 ntdb_transaction_cancel(db);
296                                 in_transaction--;
297                         }
298                         e = ntdb_transaction_start(db);
299                         if (e) {
300                                 warn_on_err(e, db,
301                                             "ntdb_transaction_start failed");
302                                 exit(1);
303                         }
304                 }
305 #endif
306                 ntdb_traverse(db, traverse_fn, NULL);
307                 ntdb_traverse(db, traverse_fn, NULL);
308
309 #if TRANSACTION_PROB
310                 if (always_transaction) {
311                         e = ntdb_transaction_commit(db);
312                         warn_on_err(e, db, "ntdb_transaction_commit failed");
313                 }
314 #endif
315         }
316
317         ntdb_close(db);
318
319         return (error_count < 100 ? error_count : 100);
320 }
321
322 static char *test_path(const char *filename)
323 {
324         const char *prefix = getenv("TEST_DATA_PREFIX");
325
326         if (prefix) {
327                 char *path = NULL;
328                 int ret;
329
330                 ret = asprintf(&path, "%s/%s", prefix, filename);
331                 if (ret == -1) {
332                         return NULL;
333                 }
334                 return path;
335         }
336
337         return strdup(filename);
338 }
339
340 int main(int argc, char * const *argv)
341 {
342         int i, seed = -1;
343         int num_loops = 5000;
344         int num_procs = 3;
345         int c, pfds[2];
346         extern char *optarg;
347         pid_t *pids;
348         int kill_random = 0;
349         int *done;
350         int ntdb_flags = NTDB_DEFAULT;
351         char *test_ntdb;
352         enum NTDB_ERROR e;
353
354         log_attr.base.attr = NTDB_ATTRIBUTE_LOG;
355         log_attr.base.next = &seed_attr;
356         log_attr.log.fn = ntdb_log;
357         seed_attr.base.attr = NTDB_ATTRIBUTE_SEED;
358         seed_attr.base.next = &hsize_attr;
359         hsize_attr.base.attr = NTDB_ATTRIBUTE_HASHSIZE;
360         hsize_attr.base.next = NULL;
361         hsize_attr.hashsize.size = 2; /* stress it by default. */
362
363         while ((c = getopt(argc, argv, "n:l:s:thkSH:")) != -1) {
364                 switch (c) {
365                 case 'n':
366                         num_procs = strtol(optarg, NULL, 0);
367                         break;
368                 case 'l':
369                         num_loops = strtol(optarg, NULL, 0);
370                         break;
371                 case 's':
372                         seed = strtol(optarg, NULL, 0);
373                         break;
374                 case 'S':
375                         ntdb_flags = NTDB_NOSYNC;
376                         break;
377                 case 't':
378 #if TRANSACTION_PROB
379                         always_transaction = 1;
380 #else
381                         fprintf(stderr, "Transactions not supported\n");
382                         usage();
383 #endif
384                         break;
385                 case 'k':
386                         kill_random = 1;
387                         break;
388                 case 'H':
389                         hsize_attr.hashsize.size = strtol(optarg, NULL, 0);
390                         break;
391                 default:
392                         usage();
393                 }
394         }
395
396         test_ntdb = test_path("torture.ntdb");
397
398         unlink(test_ntdb);
399
400         if (seed == -1) {
401                 seed = (getpid() + time(NULL)) & 0x7FFFFFFF;
402         }
403         seed_attr.seed.seed = (((uint64_t)seed) << 32) | seed;
404
405         if (num_procs == 1 && !kill_random) {
406                 /* Don't fork for this case, makes debugging easier. */
407                 error_count = run_child(test_ntdb, 0, seed, num_loops, 0,
408                                         ntdb_flags);
409                 goto done;
410         }
411
412         pids = (pid_t *)calloc(sizeof(pid_t), num_procs);
413         done = (int *)calloc(sizeof(int), num_procs);
414
415         if (pipe(pfds) != 0) {
416                 perror("Creating pipe");
417                 exit(1);
418         }
419         count_pipe = pfds[1];
420
421         for (i=0;i<num_procs;i++) {
422                 if ((pids[i]=fork()) == 0) {
423                         close(pfds[0]);
424                         if (i == 0) {
425                                 printf("testing with %d processes, %d loops, seed=%d%s\n",
426                                        num_procs, num_loops, seed,
427 #if TRANSACTION_PROB
428                                        always_transaction ? " (all within transactions)" : ""
429 #else
430                                        ""
431 #endif
432                                         );
433                         }
434                         exit(run_child(test_ntdb, i, seed, num_loops, 0,
435                                        ntdb_flags));
436                 }
437         }
438
439         while (num_procs) {
440                 int status, j;
441                 pid_t pid;
442
443                 if (error_count != 0) {
444                         /* try and stop the test on any failure */
445                         for (j=0;j<num_procs;j++) {
446                                 if (pids[j] != 0) {
447                                         kill(pids[j], SIGTERM);
448                                 }
449                         }
450                 }
451
452                 pid = waitpid(-1, &status, kill_random ? WNOHANG : 0);
453                 if (pid == 0) {
454                         struct timespec ts;
455
456                         /* Sleep for 1/10 second. */
457                         ts.tv_sec = 0;
458                         ts.tv_nsec = 100000000;
459                         nanosleep(&ts, NULL);
460
461                         /* Kill someone. */
462                         kill(pids[random() % num_procs], SIGUSR1);
463                         continue;
464                 }
465
466                 if (pid == -1) {
467                         perror("failed to wait for child\n");
468                         exit(1);
469                 }
470
471                 for (j=0;j<num_procs;j++) {
472                         if (pids[j] == pid) break;
473                 }
474                 if (j == num_procs) {
475                         printf("unknown child %d exited!?\n", (int)pid);
476                         exit(1);
477                 }
478                 if (WIFSIGNALED(status)) {
479                         if (WTERMSIG(status) == SIGUSR2
480                             || WTERMSIG(status) == SIGUSR1) {
481                                 /* SIGUSR2 means they wrote to pipe. */
482                                 if (WTERMSIG(status) == SIGUSR2) {
483                                         if (read(pfds[0], &done[j],
484                                                  sizeof(done[j]))
485                                             != sizeof(done[j]))
486                                                 err(1,
487                                                     "Short read from child?");
488                                 }
489                                 pids[j] = fork();
490                                 if (pids[j] == 0)
491                                         exit(run_child(test_ntdb, j, seed,
492                                                        num_loops, done[j],
493                                                        ntdb_flags));
494                                 printf("Restarting child %i for %u-%u\n",
495                                        j, done[j], num_loops);
496                                 continue;
497                         }
498                         printf("child %d exited with signal %d\n",
499                                (int)pid, WTERMSIG(status));
500                         error_count++;
501                 } else {
502                         if (WEXITSTATUS(status) != 0) {
503                                 printf("child %d exited with status %d\n",
504                                        (int)pid, WEXITSTATUS(status));
505                                 error_count++;
506                         }
507                 }
508                 memmove(&pids[j], &pids[j+1],
509                         (num_procs - j - 1)*sizeof(pids[0]));
510                 num_procs--;
511         }
512
513         free(pids);
514
515 done:
516         if (error_count == 0) {
517                 db = ntdb_open(test_ntdb, NTDB_DEFAULT, O_RDWR | O_CREAT,
518                               0600, &log_attr);
519                 if (!db) {
520                         fprintf(stderr, "%u:%s:%s\n", (unsigned int)getpid(), test_ntdb,
521                                 "db open failed");
522                         exit(1);
523                 }
524                 e = ntdb_check(db, NULL, NULL);
525                 if (e) {
526                         warn_on_err(e, db, "db check failed");
527                         exit(1);
528                 }
529                 ntdb_close(db);
530                 printf("OK\n");
531         }
532
533         free(test_ntdb);
534         return error_count;
535 }