static int freeze(struct ploop_copy_handle *h)
{
int ret;
ret = ioctl(h->partfd, PLOOP_IOC_FREEZE);
if (ret) {
if (errno == EINVAL)
ret = freeze_fs(h);
else
ploop_err(errno, "Failed to freeze device");
if (ret)
goto err;
} else {
ploop_log(0, "Freezing device...");
h->dev_frozen = 1;
}
ploop_dbg(3, "IOC_SYNC");
ret = ioctl_device(h->devfd, PLOOP_IOC_SYNC, 0);
if (ret)
goto err;
return 0;
err:
ploop_copy_release(h);
return ret;
}
int ploop_copy_stop(struct ploop_copy_handle *h)
{
int ret;
struct ploop_copy_stat stat = {};
int iter;
ploop_log(3, "pcopy last");
ret = freeze_fs(h);
if (ret)
goto err;
iter = 1;
for (;;) {
ret = ploop_copy_next_iteration(h, &stat);
if (ret)
goto err;
else if (stat.xferred == 0)
break;
if (iter++ > 2) {
ploop_err(0, "Too many iterations on frozen FS, aborting");
return SYSEXIT_LOOP;
}
}
/* Must clear dirty flag on ploop1 image. */
if (!h->raw) {
struct ploop_pvd_header *vh = get_free_iobuf(h);
if (PREAD(&h->idelta, vh, 4096, 0)) {
ret = SYSEXIT_READ;
goto err;
}
vh->m_DiskInUse = 0;
ploop_dbg(4, "Update header");
ret = send_buf(h, vh, 4096, 0);
if (ret)
goto err;
}
ploop_dbg(4, "IOCTL TRACK_STOP");
ret = ioctl(h->devfd, PLOOP_IOC_TRACK_STOP, 0);
if (ret)
goto err;
h->tracker_on = 0;
ploop_dbg(4, "SEND 0 0 (close)");
send_async(h, NULL, 0, 0);
pthread_join(h->send_th, NULL);
h->send_th = 0;
ploop_dbg(4, "pcopy stop done");
err:
ploop_copy_release(h);
return ret;
}