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nbd: take tx_lock before disconnecting
We need to take the tx_lock so we don't interleave our disconnect request between real data going down the wire. Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -978,11 +978,15 @@ static void send_disconnects(struct nbd_device *nbd)
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int i, ret;
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for (i = 0; i < config->num_connections; i++) {
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struct nbd_sock *nsock = config->socks[i];
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iov_iter_kvec(&from, WRITE | ITER_KVEC, &iov, 1, sizeof(request));
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mutex_lock(&nsock->tx_lock);
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ret = sock_xmit(nbd, i, 1, &from, 0, NULL);
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if (ret <= 0)
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dev_err(disk_to_dev(nbd->disk),
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"Send disconnect failed %d\n", ret);
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mutex_unlock(&nsock->tx_lock);
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}
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}
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