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drbd: drbd_recv_header(): Return 0 upon success and an error code otherwise

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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Andreas Gruenbacher 2011-03-16 17:31:52 +01:00 committed by Philipp Reisner
parent 8172f3e9bf
commit 69bc7bc351
1 changed files with 22 additions and 16 deletions
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38
drivers/block/drbd/drbd_receiver.c
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@ -971,19 +971,21 @@ static int decode_header(struct drbd_tconn *tconn, struct p_header *h, struct pa
static int drbd_recv_header(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct p_header *h = &tconn->data.rbuf.header;
int r;
int err;
r = drbd_recv(tconn, h, sizeof(*h));
if (unlikely(r != sizeof(*h))) {
err = drbd_recv(tconn, h, sizeof(*h));
if (unlikely(err != sizeof(*h))) {
if (!signal_pending(current))
conn_warn(tconn, "short read expecting header on sock: r=%d\n", r);
return false;
conn_warn(tconn, "short read expecting header on sock: r=%d\n", err);
if (err >= 0)
err = -EIO;
return err;
}
r = !decode_header(tconn, h, pi);
err = decode_header(tconn, h, pi);
tconn->last_received = jiffies;
return r;
return err;
}
static void drbd_flush(struct drbd_conf *mdev)
@ -3790,7 +3792,7 @@ static int receive_bitmap(struct drbd_conf *mdev, enum drbd_packet cmd,
goto out;
break;
}
if (!drbd_recv_header(mdev->tconn, &pi))
if (drbd_recv_header(mdev->tconn, &pi))
goto out;
cmd = pi.cmd;
data_size = pi.size;
@ -3941,7 +3943,7 @@ static void drbdd(struct drbd_tconn *tconn)
while (get_t_state(&tconn->receiver) == RUNNING) {
drbd_thread_current_set_cpu(&tconn->receiver);
if (!drbd_recv_header(tconn, &pi))
if (drbd_recv_header(tconn, &pi))
goto err_out;
if (unlikely(pi.cmd >= ARRAY_SIZE(drbd_cmd_handler) ||
@ -4179,8 +4181,8 @@ static int drbd_do_handshake(struct drbd_tconn *tconn)
if (err)
return 0;
rv = drbd_recv_header(tconn, &pi);
if (!rv)
err = drbd_recv_header(tconn, &pi);
if (err)
return 0;
if (pi.cmd != P_HAND_SHAKE) {
@ -4254,7 +4256,7 @@ static int drbd_do_auth(struct drbd_tconn *tconn)
unsigned int resp_size;
struct hash_desc desc;
struct packet_info pi;
int rv;
int err, rv;
desc.tfm = tconn->cram_hmac_tfm;
desc.flags = 0;
@ -4273,9 +4275,11 @@ static int drbd_do_auth(struct drbd_tconn *tconn)
if (!rv)
goto fail;
rv = drbd_recv_header(tconn, &pi);
if (!rv)
err = drbd_recv_header(tconn, &pi);
if (err) {
rv = 0;
goto fail;
}
if (pi.cmd != P_AUTH_CHALLENGE) {
conn_err(tconn, "expected AuthChallenge packet, received: %s (0x%04x)\n",
@ -4328,9 +4332,11 @@ static int drbd_do_auth(struct drbd_tconn *tconn)
if (!rv)
goto fail;
rv = drbd_recv_header(tconn, &pi);
if (!rv)
err = drbd_recv_header(tconn, &pi);
if (err) {
rv = 0;
goto fail;
}
if (pi.cmd != P_AUTH_RESPONSE) {
conn_err(tconn, "expected AuthResponse packet, received: %s (0x%04x)\n",