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/tdb/check.c>
  14 #include <ccan/tdb/hash.c>
  15 #include <ccan/tap/tap.h>
  16 #include <stdlib.h>
  17 #include <err.h>
  18 #include "logging.h"
  19
  20 static int tdb_expand_file_sparse(struct tdb_context *tdb,
  21                                   tdb_off_t size,
  22                                   tdb_off_t addition)
  23 {
  24         if (tdb->read_only || tdb->traverse_read) {
  25                 tdb->ecode = TDB_ERR_RDONLY;
  26                 return -1;
  27         }
  28
  29         if (ftruncate(tdb->fd, size+addition) == -1) {
  30                 char b = 0;
  31                 ssize_t written = pwrite(tdb->fd,  &b, 1, (size+addition) - 1);
  32                 if (written == 0) {
  33                         /* try once more, potentially revealing errno */
  34                         written = pwrite(tdb->fd,  &b, 1, (size+addition) - 1);
  35                 }
  36                 if (written == 0) {
  37                         /* again - give up, guessing errno */
  38                         errno = ENOSPC;
  39                 }
  40                 if (written != 1) {
  41                         TDB_LOG((tdb, TDB_DEBUG_FATAL, "expand_file to %d failed (%s)\n",
  42                                  size+addition, strerror(errno)));
  43                         return -1;
  44                 }
  45         }
  46
  47         return 0;
  48 }
  49
  50 static const struct tdb_methods large_io_methods = {
  51         tdb_read,
  52         tdb_write,
  53         tdb_next_hash_chain,
  54         tdb_oob,
  55         tdb_expand_file_sparse
  56 };
  57
  58 static int test_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data,
  59                          void *_data)
  60 {
  61         TDB_DATA *expect = _data;
  62         ok1(key.dsize == strlen("hi"));
  63         ok1(memcmp(key.dptr, "hi", strlen("hi")) == 0);
  64         ok1(data.dsize == expect->dsize);
  65         ok1(memcmp(data.dptr, expect->dptr, data.dsize) == 0);
  66         return 0;
  67 }
  68
  69 int main(int argc, char *argv[])
  70 {
  71         struct tdb_context *tdb;
  72         TDB_DATA key, orig_data, data;
  73         uint32_t hash;
  74         tdb_off_t rec_ptr;
  75         struct tdb_record rec;
  76
  77         plan_tests(24);
  78         tdb = tdb_open_ex("run-36-file.tdb", 1024, TDB_CLEAR_IF_FIRST,
  79                           O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);
  80
  81         ok1(tdb);
  82         tdb->methods = &large_io_methods;
  83
  84         /* Enlarge the file (internally multiplies by 100). */
  85         ok1(tdb_expand(tdb, 30000000) == 0);
  86
  87         /* Put an entry in, and check it. */
  88         key.dsize = strlen("hi");
  89         key.dptr = (void *)"hi";
  90         orig_data.dsize = strlen("world");
  91         orig_data.dptr = (void *)"world";
  92
  93         ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == 0);
  94
  95         data = tdb_fetch(tdb, key);
  96         ok1(data.dsize == strlen("world"));
  97         ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
  98         free(data.dptr);
  99
 100         /* That currently fills at the end, make sure that's true. */
 101         hash = tdb->hash_fn(&key);
 102         rec_ptr = tdb_find_lock_hash(tdb, key, hash, F_RDLCK, &rec);
 103         ok1(rec_ptr);
 104         ok1(rec_ptr > 2U*1024*1024*1024);
 105         tdb_unlock(tdb, BUCKET(rec.full_hash), F_RDLCK);
 106
 107         /* Traverse must work. */
 108         ok1(tdb_traverse(tdb, test_traverse, &orig_data) == 1);
 109
 110         /* Delete should work. */
 111         ok1(tdb_delete(tdb, key) == 0);
 112
 113         ok1(tdb_traverse(tdb, test_traverse, NULL) == 0);
 114
 115         /* Transactions should work. */
 116         ok1(tdb_transaction_start(tdb) == 0);
 117         ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == 0);
 118
 119         data = tdb_fetch(tdb, key);
 120         ok1(data.dsize == strlen("world"));
 121         ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
 122         free(data.dptr);
 123         ok1(tdb_transaction_commit(tdb) == 0);
 124
 125         ok1(tdb_traverse(tdb, test_traverse, &orig_data) == 1);
 126         tdb_close(tdb);
 127
 128         return exit_status();
 129 }