int
vhd_util_revert(int argc, char **argv)
{
char *name, *jname;
vhd_journal_t journal;
int c, err;
name = NULL;
jname = NULL;
optind = 0;
while ((c = getopt(argc, argv, "n:j:h")) != -1) {
switch (c) {
case 'n':
name = optarg;
break;
case 'j':
jname = optarg;
break;
case 'h':
default:
goto usage;
}
}
if (!name || !jname || argc != optind)
goto usage;
libvhd_set_log_level(1);
err = vhd_journal_open(&journal, name, jname);
if (err) {
printf("opening journal failed: %d\n", err);
return err;
}
err = vhd_journal_revert(&journal);
if (err) {
printf("reverting journal failed: %d\n", err);
vhd_journal_close(&journal);
return err;
}
err = vhd_journal_remove(&journal);
if (err) {
printf("removing journal failed: %d\n", err);
vhd_journal_close(&journal);
return err;
}
return 0;
usage:
printf("options: <-n name> <-j journal> [-h help]\n");
return -EINVAL;
}
int
vhd_journal_open(vhd_journal_t *j, const char *file, const char *jfile)
{
int err;
vhd_context_t *vhd;
memset(j, 0, sizeof(vhd_journal_t));
j->jfd = -1;
vhd = &j->vhd;
j->jname = strdup(jfile);
if (j->jname == NULL)
return -ENOMEM;
j->jfd = open(j->jname, O_LARGEFILE | O_RDWR);
if (j->jfd == -1) {
err = -errno;
goto fail;
}
err = vhd_test_file_fixed(j->jname, &j->is_block);
if (err)
goto fail;
vhd->fd = open(file, O_LARGEFILE | O_RDWR | O_DIRECT);
if (vhd->fd == -1) {
err = -errno;
goto fail;
}
err = vhd_test_file_fixed(file, &vhd->is_block);
if (err)
goto fail;
err = vhd_journal_read_journal_header(j, &j->header);
if (err)
goto fail;
err = vhd_journal_restore_metadata(j);
if (err)
goto fail;
close(vhd->fd);
free(vhd->bat.bat);
free(vhd->batmap.map);
err = vhd_open(vhd, file, VHD_OPEN_RDWR);
if (err)
goto fail;
err = vhd_get_bat(vhd);
if (err)
goto fail;
if (vhd_has_batmap(vhd)) {
err = vhd_get_batmap(vhd);
if (err)
goto fail;
}
err = vhd_journal_disable_vhd(j);
if (err)
goto fail;
return 0;
fail:
vhd_journal_close(j);
return err;
}