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 <ccan/tdb/tdb.h>
   5 #include <ccan/tdb/io.c>
   6 #include <ccan/tdb/tdb.c>
   7 #include <ccan/tdb/lock.c>
   8 #include <ccan/tdb/freelist.c>
   9 #include <ccan/tdb/traverse.c>
  10 #include <ccan/tdb/transaction.c>
  11 #include <ccan/tdb/error.c>
  12 #include <ccan/tdb/open.c>
  13 #include <ccan/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         tdb_brunlock
  55 };
  56
  57 static int test_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data,
  58                          void *_data)
  59 {
  60         TDB_DATA *expect = _data;
  61         ok1(key.dsize == strlen("hi"));
  62         ok1(memcmp(key.dptr, "hi", strlen("hi")) == 0);
  63         ok1(data.dsize == expect->dsize);
  64         ok1(memcmp(data.dptr, expect->dptr, data.dsize) == 0);
  65         return 0;
  66 }
  67
  68 int main(int argc, char *argv[])
  69 {
  70         struct tdb_context *tdb;
  71         TDB_DATA key, orig_data, data;
  72         uint32_t hash;
  73         tdb_off_t rec_ptr;
  74         struct tdb_record rec;
  75
  76         plan_tests(24);
  77         tdb = tdb_open("/tmp/test.tdb", 1024, TDB_CLEAR_IF_FIRST,
  78                        O_CREAT|O_TRUNC|O_RDWR, 0600);
  79
  80         ok1(tdb);
  81         tdb->methods = &large_io_methods;
  82
  83         /* Enlarge the file (internally multiplies by 100). */
  84         ok1(tdb_expand(tdb, 30000000) == 0);
  85
  86         /* Put an entry in, and check it. */
  87         key.dsize = strlen("hi");
  88         key.dptr = (void *)"hi";
  89         orig_data.dsize = strlen("world");
  90         orig_data.dptr = (void *)"world";
  91
  92         ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == 0);
  93
  94         data = tdb_fetch(tdb, key);
  95         ok1(data.dsize == strlen("world"));
  96         ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
  97         free(data.dptr);
  98
  99         /* That currently fills at the end, make sure that's true. */
 100         hash = tdb->hash_fn(&key);
 101         rec_ptr = tdb_find_lock_hash(tdb, key, hash, F_RDLCK, &rec);
 102         ok1(rec_ptr);
 103         ok1(rec_ptr > 2U*1024*1024*1024);
 104         tdb_unlock(tdb, BUCKET(rec.full_hash), F_RDLCK);
 105
 106         /* Traverse must work. */
 107         ok1(tdb_traverse(tdb, test_traverse, &orig_data) == 1);
 108
 109         /* Delete should work. */
 110         ok1(tdb_delete(tdb, key) == 0);
 111
 112         ok1(tdb_traverse(tdb, test_traverse, NULL) == 0);
 113
 114         /* Transactions should work. */
 115         ok1(tdb_transaction_start(tdb) == 0);
 116         ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == 0);
 117
 118         data = tdb_fetch(tdb, key);
 119         ok1(data.dsize == strlen("world"));
 120         ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
 121         free(data.dptr);
 122         ok1(tdb_transaction_commit(tdb) == 0);
 123
 124         ok1(tdb_traverse(tdb, test_traverse, &orig_data) == 1);
 125         tdb_close(tdb);
 126
 127         return exit_status();
 128 }