net: support 64bit values for setsockopt(SO_MAX_PACING_RATE) (6bdef102) · Commits · 戴 / test

64bit kernels now support 64bit pacing rates. This commit changes setsockopt() to accept 64bit values provided by applications. Old applications providing 32bit value are still supported, but limited to the old 34Gbit limitation. Signed-off-by:

Eric Dumazet <edumazet@google.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

net/core/sock.c

+13 −5

Original line number	Diff line number	Diff line
		@@ -1108,15 +1108,23 @@ set_rcvbuf:
		#endif

		case SO_MAX_PACING_RATE:
		if (val != ~0U)
		{
		unsigned long ulval = (val == ~0U) ? ~0UL : val;

		if (sizeof(ulval) != sizeof(val) &&
		optlen >= sizeof(ulval) &&
		get_user(ulval, (unsigned long __user *)optval)) {
		ret = -EFAULT;
		break;
		}
		if (ulval != ~0UL)
		cmpxchg(&sk->sk_pacing_status,
		SK_PACING_NONE,
		SK_PACING_NEEDED);
		sk->sk_max_pacing_rate = (val == ~0U) ? ~0UL : val;
		sk->sk_pacing_rate = min(sk->sk_pacing_rate,
		sk->sk_max_pacing_rate);
		sk->sk_max_pacing_rate = ulval;
		sk->sk_pacing_rate = min(sk->sk_pacing_rate, ulval);
		break;

		}
		case SO_INCOMING_CPU:
		sk->sk_incoming_cpu = val;
		break;

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