lib/tdb/test/run-transaction-expand.c

   1 #include "../common/tdb_private.h"
   2
   3 /* Speed up the tests, but do the actual sync tests. */
   4 static unsigned int sync_counts = 0;
   5 static inline int fake_fsync(int fd)
   6 {
   7         sync_counts++;
   8         return 0;
   9 }
  10 #define fsync fake_fsync
  11
  12 #ifdef MS_SYNC
  13 static inline int fake_msync(void *addr, size_t length, int flags)
  14 {
  15         sync_counts++;
  16         return 0;
  17 }
  18 #define msync fake_msync
  19 #endif
  20
  21 #ifdef HAVE_FDATASYNC
  22 static inline int fake_fdatasync(int fd)
  23 {
  24         sync_counts++;
  25         return 0;
  26 }
  27 #define fdatasync fake_fdatasync
  28 #endif
  29
  30 #include "../common/io.c"
  31 #include "../common/tdb.c"
  32 #include "../common/lock.c"
  33 #include "../common/freelist.c"
  34 #include "../common/traverse.c"
  35 #include "../common/transaction.c"
  36 #include "../common/error.c"
  37 #include "../common/open.c"
  38 #include "../common/check.c"
  39 #include "../common/hash.c"
  40 #include "tap-interface.h"
  41 #include <stdlib.h>
  42 #include "logging.h"
  43
  44 static void write_record(struct tdb_context *tdb, size_t extra_len,
  45                          TDB_DATA *data)
  46 {
  47         TDB_DATA key;
  48         key.dsize = strlen("hi");
  49         key.dptr = (void *)"hi";
  50
  51         data->dsize += extra_len;
  52         tdb_transaction_start(tdb);
  53         tdb_store(tdb, key, *data, TDB_REPLACE);
  54         tdb_transaction_commit(tdb);
  55 }
  56
  57 int main(int argc, char *argv[])
  58 {
  59         struct tdb_context *tdb;
  60         size_t i;
  61         TDB_DATA data;
  62         struct tdb_record rec;
  63         tdb_off_t off;
  64
  65         /* Do *not* suppress sync for this test; we do it ourselves. */
  66         unsetenv("TDB_NO_FSYNC");
  67
  68         plan_tests(5);
  69         tdb = tdb_open_ex("run-transaction-expand.tdb",
  70                           1024, TDB_CLEAR_IF_FIRST,
  71                           O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
  72         ok1(tdb);
  73
  74         data.dsize = 0;
  75         data.dptr = calloc(1000, getpagesize());
  76         if (data.dptr == NULL) {
  77                 diag("Unable to allocate memory for data.dptr");
  78                 tdb_close(tdb);
  79                 exit(1);
  80         }
  81
  82         /* Simulate a slowly growing record. */
  83         for (i = 0; i < 1000; i++)
  84                 write_record(tdb, getpagesize(), &data);
  85
  86         tdb_ofs_read(tdb, TDB_RECOVERY_HEAD, &off);
  87         tdb_read(tdb, off, &rec, sizeof(rec), DOCONV());
  88         diag("TDB size = %zu, recovery = %llu-%llu",
  89              (size_t)tdb->map_size, (unsigned long long)off, (unsigned long long)(off + sizeof(rec) + rec.rec_len));
  90
  91         /* We should only be about 5 times larger than largest record. */
  92         ok1(tdb->map_size < 6 * i * getpagesize());
  93         tdb_close(tdb);
  94
  95         tdb = tdb_open_ex("run-transaction-expand.tdb",
  96                           1024, TDB_CLEAR_IF_FIRST,
  97                           O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
  98         ok1(tdb);
  99
 100         data.dsize = 0;
 101
 102         /* Simulate a slowly growing record, repacking to keep
 103          * recovery area at end. */
 104         for (i = 0; i < 1000; i++) {
 105                 write_record(tdb, getpagesize(), &data);
 106                 if (i % 10 == 0)
 107                         tdb_repack(tdb);
 108         }
 109
 110         tdb_ofs_read(tdb, TDB_RECOVERY_HEAD, &off);
 111         tdb_read(tdb, off, &rec, sizeof(rec), DOCONV());
 112         diag("TDB size = %zu, recovery = %llu-%llu",
 113              (size_t)tdb->map_size, (unsigned long long)off, (unsigned long long)(off + sizeof(rec) + rec.rec_len));
 114
 115         /* We should only be about 4 times larger than largest record. */
 116         ok1(tdb->map_size < 5 * i * getpagesize());
 117
 118         /* We should have synchronized multiple times. */
 119         ok1(sync_counts);
 120         tdb_close(tdb);
 121         free(data.dptr);
 122
 123         return exit_status();
 124 }