lib/tdb/test/run-3G-file.c

   1 #include "../common/tdb_private.h"
   2 #include "../common/io.c"
   3 #include "../common/tdb.c"
   4 #include "../common/lock.c"
   5 #include "../common/freelist.c"
   6 #include "../common/traverse.c"
   7 #include "../common/transaction.c"
   8 #include "../common/error.c"
   9 #include "../common/open.c"
  10 #include "../common/check.c"
  11 #include "../common/hash.c"
  12 #include "tap-interface.h"
  13 #include <stdlib.h>
  14 #include <err.h>
  15 #include "logging.h"
  16
  17 static int tdb_expand_file_sparse(struct tdb_context *tdb,
  18                                   tdb_off_t size,
  19                                   tdb_off_t addition)
  20 {
  21         if (tdb->read_only || tdb->traverse_read) {
  22                 tdb->ecode = TDB_ERR_RDONLY;
  23                 return -1;
  24         }
  25
  26         if (ftruncate(tdb->fd, size+addition) == -1) {
  27                 char b = 0;
  28                 ssize_t written = pwrite(tdb->fd,  &b, 1, (size+addition) - 1);
  29                 if (written == 0) {
  30                         /* try once more, potentially revealing errno */
  31                         written = pwrite(tdb->fd,  &b, 1, (size+addition) - 1);
  32                 }
  33                 if (written == 0) {
  34                         /* again - give up, guessing errno */
  35                         errno = ENOSPC;
  36                 }
  37                 if (written != 1) {
  38                         TDB_LOG((tdb, TDB_DEBUG_FATAL, "expand_file to %d failed (%s)\n",
  39                                  size+addition, strerror(errno)));
  40                         return -1;
  41                 }
  42         }
  43
  44         return 0;
  45 }
  46
  47 static const struct tdb_methods large_io_methods = {
  48         tdb_read,
  49         tdb_write,
  50         tdb_next_hash_chain,
  51         tdb_oob,
  52         tdb_expand_file_sparse
  53 };
  54
  55 static int test_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data,
  56                          void *_data)
  57 {
  58         TDB_DATA *expect = _data;
  59         ok1(key.dsize == strlen("hi"));
  60         ok1(memcmp(key.dptr, "hi", strlen("hi")) == 0);
  61         ok1(data.dsize == expect->dsize);
  62         ok1(memcmp(data.dptr, expect->dptr, data.dsize) == 0);
  63         return 0;
  64 }
  65
  66 int main(int argc, char *argv[])
  67 {
  68         struct tdb_context *tdb;
  69         TDB_DATA key, orig_data, data;
  70         uint32_t hash;
  71         tdb_off_t rec_ptr;
  72         struct tdb_record rec;
  73
  74         plan_tests(24);
  75         tdb = tdb_open_ex("run-36-file.tdb", 1024, TDB_CLEAR_IF_FIRST,
  76                           O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
  77
  78         ok1(tdb);
  79         tdb->methods = &large_io_methods;
  80
  81         /* Enlarge the file (internally multiplies by 2). */
  82         ok1(tdb_expand(tdb, 1500000000) == 0);
  83
  84         /* Put an entry in, and check it. */
  85         key.dsize = strlen("hi");
  86         key.dptr = (void *)"hi";
  87         orig_data.dsize = strlen("world");
  88         orig_data.dptr = (void *)"world";
  89
  90         ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == 0);
  91
  92         data = tdb_fetch(tdb, key);
  93         ok1(data.dsize == strlen("world"));
  94         ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
  95         free(data.dptr);
  96
  97         /* That currently fills at the end, make sure that's true. */
  98         hash = tdb->hash_fn(&key);
  99         rec_ptr = tdb_find_lock_hash(tdb, key, hash, F_RDLCK, &rec);
 100         ok1(rec_ptr);
 101         ok1(rec_ptr > 2U*1024*1024*1024);
 102         tdb_unlock(tdb, BUCKET(rec.full_hash), F_RDLCK);
 103
 104         /* Traverse must work. */
 105         ok1(tdb_traverse(tdb, test_traverse, &orig_data) == 1);
 106
 107         /* Delete should work. */
 108         ok1(tdb_delete(tdb, key) == 0);
 109
 110         ok1(tdb_traverse(tdb, test_traverse, NULL) == 0);
 111
 112         /* Transactions should work. */
 113         ok1(tdb_transaction_start(tdb) == 0);
 114         ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == 0);
 115
 116         data = tdb_fetch(tdb, key);
 117         ok1(data.dsize == strlen("world"));
 118         ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
 119         free(data.dptr);
 120         ok1(tdb_transaction_commit(tdb) == 0);
 121
 122         ok1(tdb_traverse(tdb, test_traverse, &orig_data) == 1);
 123         tdb_close(tdb);
 124
 125         return exit_status();
 126 }