/*
* Wait for all forward requests completion.
*
* Even if something goes wrong, we have to wait forward requests completion to
* avoid interleaved requests.
*
* Return error code if any one request fails.
*/
static int wait_forward_request(struct write_info *wi, struct request *req)
{
int nr_sent, err_ret = SD_RES_SUCCESS, ret, pollret, i;
struct pfd_info pi;
struct sd_rsp *rsp = &req->rp;
again:
pfd_info_init(wi, &pi);
pollret = poll(pi.pfds, pi.nr, 5000);
if (pollret < 0) {
if (errno == EINTR)
goto again;
panic("%m\n");
} else if (pollret == 0) {
eprintf("poll timeout %d\n", wi->nr_sent);
if (req->rq.epoch == sys_epoch())
goto again;
nr_sent = wi->nr_sent;
/* XXX Blinedly close all the connections */
for (i = 0; i < nr_sent; i++)
finish_one_write_err(wi, i);
err_ret = SD_RES_NETWORK_ERROR;
goto finish_write;
}
nr_sent = wi->nr_sent;
for (i = 0; i < nr_sent; i++)
if (pi.pfds[i].revents & POLLIN)
break;
if (i < nr_sent) {
int re = pi.pfds[i].revents;
dprintf("%d, revents %x\n", i, re);
if (re & (POLLERR | POLLHUP | POLLNVAL)) {
err_ret = SD_RES_NETWORK_ERROR;
finish_one_write_err(wi, i);
goto finish_write;
}
if (do_read(pi.pfds[i].fd, rsp, sizeof(*rsp))) {
eprintf("remote node might have gone away\n");
err_ret = SD_RES_NETWORK_ERROR;
finish_one_write_err(wi, i);
goto finish_write;
}
ret = rsp->result;
if (ret != SD_RES_SUCCESS) {
eprintf("fail %"PRIx32"\n", ret);
err_ret = ret;
}
finish_one_write(wi, i);
}
finish_write:
if (wi->nr_sent > 0)
goto again;
return err_ret;
}
/*
* Wait for all forward requests completion.
*
* Even if something goes wrong, we have to wait forward requests completion to
* avoid interleaved requests.
*
* Return error code if any one request fails.
*/
static int wait_forward_request(struct write_info *wi, struct request *req)
{
int nr_sent, err_ret = SD_RES_SUCCESS, ret, pollret, i,
repeat = MAX_RETRY_COUNT;
struct pfd_info pi;
struct sd_rsp *rsp = &req->rp;
again:
pfd_info_init(wi, &pi);
pollret = poll(pi.pfds, pi.nr, 1000 * POLL_TIMEOUT);
if (pollret < 0) {
if (errno == EINTR)
goto again;
panic("%m");
} else if (pollret == 0) {
/*
* If IO NIC is down, epoch isn't incremented, so we can't retry
* for ever.
*/
if (sheep_need_retry(req->rq.epoch) && repeat) {
repeat--;
sd_warn("poll timeout %d, disks of some nodes or "
"network is busy. Going to poll-wait again",
wi->nr_sent);
goto again;
}
nr_sent = wi->nr_sent;
/* XXX Blinedly close all the connections */
for (i = 0; i < nr_sent; i++)
sockfd_cache_del(wi->ent[i].nid, wi->ent[i].sfd);
return SD_RES_NETWORK_ERROR;
}
nr_sent = wi->nr_sent;
for (i = 0; i < nr_sent; i++)
if (pi.pfds[i].revents & POLLIN)
break;
if (i < nr_sent) {
int re = pi.pfds[i].revents;
sd_debug("%d, revents %x", i, re);
if (re & (POLLERR | POLLHUP | POLLNVAL)) {
err_ret = SD_RES_NETWORK_ERROR;
finish_one_write_err(wi, i);
goto finish_write;
}
if (do_read(pi.pfds[i].fd, rsp, sizeof(*rsp), sheep_need_retry,
req->rq.epoch, MAX_RETRY_COUNT)) {
sd_err("remote node might have gone away");
err_ret = SD_RES_NETWORK_ERROR;
finish_one_write_err(wi, i);
goto finish_write;
}
ret = rsp->result;
if (ret != SD_RES_SUCCESS) {
sd_err("fail %"PRIx64", %s", req->rq.obj.oid,
sd_strerror(ret));
err_ret = ret;
}
finish_one_write(wi, i);
}
finish_write:
if (wi->nr_sent > 0)
goto again;
return err_ret;
}
