source: vendor/current/lib/tdb/test/run-3G-file.c

#include "../common/tdb_private.h"
#include "../common/io.c"
#include "../common/tdb.c"
#include "../common/lock.c"
#include "../common/freelist.c"
#include "../common/traverse.c"
#include "../common/transaction.c"
#include "../common/error.c"
#include "../common/open.c"
#include "../common/check.c"
#include "../common/hash.c"
#include "../common/mutex.c"
#include "tap-interface.h"
#include <stdlib.h>
#include "logging.h"

static int tdb_expand_file_sparse(struct tdb_context *tdb,
                                  tdb_off_t size,
                                  tdb_off_t addition)
{
        if (tdb->read_only || tdb->traverse_read) {
                tdb->ecode = TDB_ERR_RDONLY;
                return -1;
        }

        if (tdb_ftruncate(tdb, size+addition) == -1) {
                char b = 0;
                ssize_t written = tdb_pwrite(tdb,  &b, 1, (size+addition) - 1);
                if (written == 0) {
                        /* try once more, potentially revealing errno */
                        written = tdb_pwrite(tdb,  &b, 1, (size+addition) - 1);
                }
                if (written == 0) {
                        /* again - give up, guessing errno */
                        errno = ENOSPC;
                }
                if (written != 1) {
                        TDB_LOG((tdb, TDB_DEBUG_FATAL, "expand_file to %d failed (%s)\n",
                                 size+addition, strerror(errno)));
                        return -1;
                }
        }

        return 0;
}

static const struct tdb_methods large_io_methods = {
        tdb_read,
        tdb_write,
        tdb_next_hash_chain,
        tdb_oob,
        tdb_expand_file_sparse
};

static int test_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data,
                         void *_data)
{
        TDB_DATA *expect = _data;
        ok1(key.dsize == strlen("hi"));
        ok1(memcmp(key.dptr, "hi", strlen("hi")) == 0);
        ok1(data.dsize == expect->dsize);
        ok1(memcmp(data.dptr, expect->dptr, data.dsize) == 0);
        return 0;
}

int main(int argc, char *argv[])
{
        struct tdb_context *tdb;
        TDB_DATA key, orig_data, data;
        uint32_t hashval;
        tdb_off_t rec_ptr;
        struct tdb_record rec;
        int ret;

        plan_tests(24);
        tdb = tdb_open_ex("run-36-file.tdb", 1024, TDB_CLEAR_IF_FIRST,
                          O_CREAT|O_TRUNC|O_RDWR, 0600, &taplogctx, NULL);

        ok1(tdb);
        tdb->methods = &large_io_methods;

        key.dsize = strlen("hi");
        key.dptr = discard_const_p(uint8_t, "hi");
        orig_data.dsize = strlen("world");
        orig_data.dptr = discard_const_p(uint8_t, "world");

        /* Enlarge the file (internally multiplies by 2). */
        ret = tdb_expand(tdb, 1500000000);
#ifdef HAVE_INCOHERENT_MMAP
        /* This can fail due to mmap failure on 32 bit systems. */
        if (ret == -1) {
                /* These should now fail. */
                ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == -1);
                data = tdb_fetch(tdb, key);
                ok1(data.dptr == NULL);
                ok1(tdb_traverse(tdb, test_traverse, &orig_data) == -1);
                ok1(tdb_delete(tdb, key) == -1);
                ok1(tdb_traverse(tdb, test_traverse, NULL) == -1);
                /* Skip the rest... */
                for (ret = 0; ret < 24 - 6; ret++)
                        ok1(1);
                tdb_close(tdb);
                return exit_status();
        }
#endif
        ok1(ret == 0);

        /* Put an entry in, and check it. */
        ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == 0);

        data = tdb_fetch(tdb, key);
        ok1(data.dsize == strlen("world"));
        ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
        free(data.dptr);

        /* That currently fills at the end, make sure that's true. */
        hashval = tdb->hash_fn(&key);
        rec_ptr = tdb_find_lock_hash(tdb, key, hashval, F_RDLCK, &rec);
        ok1(rec_ptr);
        ok1(rec_ptr > 2U*1024*1024*1024);
        tdb_unlock(tdb, BUCKET(rec.full_hash), F_RDLCK);

        /* Traverse must work. */
        ok1(tdb_traverse(tdb, test_traverse, &orig_data) == 1);

        /* Delete should work. */
        ok1(tdb_delete(tdb, key) == 0);

        ok1(tdb_traverse(tdb, test_traverse, NULL) == 0);

        /* Transactions should work. */
        ok1(tdb_transaction_start(tdb) == 0);
        ok1(tdb_store(tdb, key, orig_data, TDB_INSERT) == 0);

        data = tdb_fetch(tdb, key);
        ok1(data.dsize == strlen("world"));
        ok1(memcmp(data.dptr, "world", strlen("world")) == 0);
        free(data.dptr);
        ok1(tdb_transaction_commit(tdb) == 0);

        ok1(tdb_traverse(tdb, test_traverse, &orig_data) == 1);
        tdb_close(tdb);

        return exit_status();
}