git.ozlabs.org Git - ccan/blob - ccan/tdb/test/run-3G-file.c

   1 /* We need this otherwise fcntl locking fails. */
   2 #define _FILE_OFFSET_BITS 64
   3 #define _XOPEN_SOURCE 500
   4 #include "tdb/tdb.h"
   5 #include "tdb/io.c"
   6 #include "tdb/tdb.c"
   7 #include "tdb/lock.c"
   8 #include "tdb/freelist.c"
   9 #include "tdb/traverse.c"
  10 #include "tdb/transaction.c"
  11 #include "tdb/error.c"
  12 #include "tdb/open.c"
  13 #include "tap/tap.h"
  14 #include <stdlib.h>
  15 #include <err.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         tdb_brlock
  54 };
  55
  56 static int test_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data,
  57                          void *_data)
  58 {
  59         TDB_DATA *expect = _data;
  60         ok1(key.dsize == strlen("hi"));
  61         ok1(memcmp(key.dptr, "hi", strlen("hi")) == 0);
  62         ok1(data.dsize == expect->dsize);
  63         ok1(memcmp(data.dptr, expect->dptr, data.dsize) == 0);
  64         return 0;
  65 }
  66
  67 int main(int argc, char *argv[])
  68 {
  69         struct tdb_context *tdb;
  70         TDB_DATA key, orig_data, data;
  71         uint32_t hash;
  72         tdb_off_t rec_ptr;
  73         struct list_struct rec;
  74
  75         plan_tests(24);
  76         tdb = tdb_open("/tmp/test.tdb", 1024, TDB_CLEAR_IF_FIRST,
  77                        O_CREAT|O_TRUNC|O_RDWR, 0600);
  78
  79         ok1(tdb);
  80         tdb->methods = &large_io_methods;
  81
  82         /* Enlarge the file (internally multiplies by 100). */
  83         ok1(tdb_expand(tdb, 30000000) == 0);
  84
  85         /* Put an entry in, and check it. */
  86         key.dsize = strlen("hi");
  87         key.dptr = (void *)"hi";
  88         orig_data.dsize = strlen("world");
  89         orig_data.dptr = (void *)"world";
  90
  91         ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == 0);
  92
  93         data = tdb_fetch(tdb, key);
  94         ok1(data.dsize == strlen("world"));
  95         ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
  96         free(data.dptr);
  97
  98         /* That currently fills at the end, make sure that's true. */
  99         hash = tdb->hash_fn(&key);
 100         rec_ptr = tdb_find_lock_hash(tdb, key, hash, F_RDLCK, &rec);
 101         ok1(rec_ptr);
 102         ok1(rec_ptr > 2U*1024*1024*1024);
 103         tdb_unlock(tdb, BUCKET(rec.full_hash), F_RDLCK);
 104
 105         /* Traverse must work. */
 106         ok1(tdb_traverse(tdb, test_traverse, &orig_data) == 1);
 107
 108         /* Delete should work. */
 109         ok1(tdb_delete(tdb, key) == 0);
 110
 111         ok1(tdb_traverse(tdb, test_traverse, NULL) == 0);
 112
 113         /* Transactions should work. */
 114         ok1(tdb_transaction_start(tdb) == 0);
 115         ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == 0);
 116
 117         data = tdb_fetch(tdb, key);
 118         ok1(data.dsize == strlen("world"));
 119         ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
 120         free(data.dptr);
 121         ok1(tdb_transaction_commit(tdb) == 0);
 122
 123         ok1(tdb_traverse(tdb, test_traverse, &orig_data) == 1);
 124         tdb_close(tdb);
 125
 126         return exit_status();
 127 }