tdb/tools/tdbtorture.c

説明を見る。

/* this tests tdb by doing lots of ops from several simultaneous
   writers - that stresses the locking code. 
*/

#include "replace.h"
#include "tdb.h"
#include "system/time.h"
#include "system/wait.h"
#include "system/filesys.h"

#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif


#define REOPEN_PROB 30
#define DELETE_PROB 8
#define STORE_PROB 4
#define APPEND_PROB 6
#define TRANSACTION_PROB 10
#define LOCKSTORE_PROB 5
#define TRAVERSE_PROB 20
#define TRAVERSE_READ_PROB 20
#define CULL_PROB 100
#define KEYLEN 3
#define DATALEN 100

static struct tdb_context *db;
static int in_transaction;
static int error_count;

#ifdef PRINTF_ATTRIBUTE
static void tdb_log(struct tdb_context *tdb, enum tdb_debug_level level, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
#endif
static void tdb_log(struct tdb_context *tdb, enum tdb_debug_level level, const char *format, ...)
{
        va_list ap;
    
        error_count++;

        va_start(ap, format);
        vfprintf(stdout, format, ap);
        va_end(ap);
        fflush(stdout);
#if 0
        {
                char *ptr;
                asprintf(&ptr,"xterm -e gdb /proc/%d/exe %d", getpid(), getpid());
                system(ptr);
                free(ptr);
        }
#endif  
}

static void fatal(const char *why)
{
        perror(why);
        error_count++;
}

static char *randbuf(int len)
{
        char *buf;
        int i;
        buf = (char *)malloc(len+1);

        for (i=0;i<len;i++) {
                buf[i] = 'a' + (rand() % 26);
        }
        buf[i] = 0;
        return buf;
}

static int cull_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
                         void *state)
{
#if CULL_PROB
        if (random() % CULL_PROB == 0) {
                tdb_delete(tdb, key);
        }
#endif
        return 0;
}

static void addrec_db(void)
{
        int klen, dlen;
        char *k, *d;
        TDB_DATA key, data;

        klen = 1 + (rand() % KEYLEN);
        dlen = 1 + (rand() % DATALEN);

        k = randbuf(klen);
        d = randbuf(dlen);

        key.dptr = (unsigned char *)k;
        key.dsize = klen+1;

        data.dptr = (unsigned char *)d;
        data.dsize = dlen+1;

#if TRANSACTION_PROB
        if (in_transaction == 0 && random() % TRANSACTION_PROB == 0) {
                if (tdb_transaction_start(db) != 0) {
                        fatal("tdb_transaction_start failed");
                }
                in_transaction++;
                goto next;
        }
        if (in_transaction && random() % TRANSACTION_PROB == 0) {
                if (tdb_transaction_commit(db) != 0) {
                        fatal("tdb_transaction_commit failed");
                }
                in_transaction--;
                goto next;
        }
        if (in_transaction && random() % TRANSACTION_PROB == 0) {
                if (tdb_transaction_cancel(db) != 0) {
                        fatal("tdb_transaction_cancel failed");
                }
                in_transaction--;
                goto next;
        }
#endif

#if REOPEN_PROB
        if (in_transaction == 0 && random() % REOPEN_PROB == 0) {
                tdb_reopen_all(0);
                goto next;
        } 
#endif

#if DELETE_PROB
        if (random() % DELETE_PROB == 0) {
                tdb_delete(db, key);
                goto next;
        }
#endif

#if STORE_PROB
        if (random() % STORE_PROB == 0) {
                if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
                        fatal("tdb_store failed");
                }
                goto next;
        }
#endif

#if APPEND_PROB
        if (random() % APPEND_PROB == 0) {
                if (tdb_append(db, key, data) != 0) {
                        fatal("tdb_append failed");
                }
                goto next;
        }
#endif

#if LOCKSTORE_PROB
        if (random() % LOCKSTORE_PROB == 0) {
                tdb_chainlock(db, key);
                data = tdb_fetch(db, key);
                if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
                        fatal("tdb_store failed");
                }
                if (data.dptr) free(data.dptr);
                tdb_chainunlock(db, key);
                goto next;
        } 
#endif

#if TRAVERSE_PROB
        if (random() % TRAVERSE_PROB == 0) {
                tdb_traverse(db, cull_traverse, NULL);
                goto next;
        }
#endif

#if TRAVERSE_READ_PROB
        if (random() % TRAVERSE_READ_PROB == 0) {
                tdb_traverse_read(db, NULL, NULL);
                goto next;
        }
#endif

        data = tdb_fetch(db, key);
        if (data.dptr) free(data.dptr);

next:
        free(k);
        free(d);
}

static int traverse_fn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
                       void *state)
{
        tdb_delete(tdb, key);
        return 0;
}

static void usage(void)
{
        printf("Usage: tdbtorture [-n NUM_PROCS] [-l NUM_LOOPS] [-s SEED] [-H HASH_SIZE]\n");
        exit(0);
}

 int main(int argc, char * const *argv)
{
        int i, seed = -1;
        int num_procs = 3;
        int num_loops = 5000;
        int hash_size = 2;
        int c;
        extern char *optarg;
        pid_t *pids;

        struct tdb_logging_context log_ctx;
        log_ctx.log_fn = tdb_log;

        while ((c = getopt(argc, argv, "n:l:s:H:h")) != -1) {
                switch (c) {
                case 'n':
                        num_procs = strtol(optarg, NULL, 0);
                        break;
                case 'l':
                        num_loops = strtol(optarg, NULL, 0);
                        break;
                case 'H':
                        hash_size = strtol(optarg, NULL, 0);
                        break;
                case 's':
                        seed = strtol(optarg, NULL, 0);
                        break;
                default:
                        usage();
                }
        }

        unlink("torture.tdb");

        pids = calloc(sizeof(pid_t), num_procs);
        pids[0] = getpid();

        for (i=0;i<num_procs-1;i++) {
                if ((pids[i+1]=fork()) == 0) break;
        }

        db = tdb_open_ex("torture.tdb", hash_size, TDB_CLEAR_IF_FIRST, 
                         O_RDWR | O_CREAT, 0600, &log_ctx, NULL);
        if (!db) {
                fatal("db open failed");
        }

        if (seed == -1) {
                seed = (getpid() + time(NULL)) & 0x7FFFFFFF;
        }

        if (i == 0) {
                printf("testing with %d processes, %d loops, %d hash_size, seed=%d\n", 
                       num_procs, num_loops, hash_size, seed);
        }

        srand(seed + i);
        srandom(seed + i);

        for (i=0;i<num_loops && error_count == 0;i++) {
                addrec_db();
        }

        if (error_count == 0) {
                tdb_traverse_read(db, NULL, NULL);
                tdb_traverse(db, traverse_fn, NULL);
                tdb_traverse(db, traverse_fn, NULL);
        }

        tdb_close(db);

        if (getpid() != pids[0]) {
                return error_count;
        }

        for (i=1;i<num_procs;i++) {
                int status, j;
                pid_t pid;
                if (error_count != 0) {
                        /* try and stop the test on any failure */
                        for (j=1;j<num_procs;j++) {
                                if (pids[j] != 0) {
                                        kill(pids[j], SIGTERM);
                                }
                        }
                }
                pid = waitpid(-1, &status, 0);
                if (pid == -1) {
                        perror("failed to wait for child\n");
                        exit(1);
                }
                for (j=1;j<num_procs;j++) {
                        if (pids[j] == pid) break;
                }
                if (j == num_procs) {
                        printf("unknown child %d exited!?\n", (int)pid);
                        exit(1);
                }
                if (WEXITSTATUS(status) != 0) {
                        printf("child %d exited with status %d\n",
                               (int)pid, WEXITSTATUS(status));
                        error_count++;
                }
                pids[j] = 0;
        }

        if (error_count == 0) {
                printf("OK\n");
        }

        return error_count;
}

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