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drbd: Add drbd_recv_all(): Receive an entire buffer
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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@ -565,6 +565,19 @@ static int drbd_recv(struct drbd_tconn *tconn, void *buf, size_t size)
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return rv;
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}
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static int drbd_recv_all(struct drbd_tconn *tconn, void *buf, size_t size)
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{
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int err;
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err = drbd_recv(tconn, buf, size);
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if (err != size) {
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if (err >= 0)
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err = -EIO;
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} else
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err = 0;
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return err;
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}
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/* quoting tcp(7):
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* On individual connections, the socket buffer size must be set prior to the
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* listen(2) or connect(2) calls in order to have it take effect.
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