static int send_image_block(struct ploop_copy_handle *h, __u64 size,
__u64 pos, ssize_t *nread)
{
struct delta *idelta = &h->idelta;
void *iobuf = get_free_iobuf(h);
ploop_dbg(4, "READ size=%llu pos=%llu", size, pos);
*nread = pread(idelta->fd, iobuf, size, pos);
if (*nread == 0)
return 0;
if (*nread < 0) {
ploop_err(errno, "Error from read");
return SYSEXIT_READ;
}
return send_async(h, iobuf, *nread, pos);
}
int ploop_copy_stop(struct ploop_copy_handle *h,
struct ploop_copy_stat *stat)
{
int ret;
int iter;
ploop_log(3, "pcopy last");
ret = freeze(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;
}
}
if (!h->raw) {
/* Must clear dirty flag on ploop1 image. */
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(3, "Update header");
ret = send_buf(h, vh, 4096, 0);
if (ret)
goto err;
ret = send_optional_header(h);
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(3, "SEND 0 0 (close)");
send_async(h, NULL, 0, 0);
pthread_join(h->send_th, NULL);
h->send_th = 0;
ploop_dbg(3, "pcopy stop done");
err:
ploop_copy_release(h);
return ret;
}
