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Commit c06fff6e authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

af_packet: packet_getsockopt() cleanup 



Factorize code, since most fetched values are int type.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 900f65d3

net/packet/af_packet.c

+8 −38
Original line number Diff line number Diff line
@@ -3224,10 +3224,10 @@ static int packet_getsockopt(struct socket *sock, int level, int optname, 
			     char __user *optval, int __user *optlen)

{

	int len;

	int val;

	int val, lv = sizeof(val);

	struct sock *sk = sock->sk;

	struct packet_sock *po = pkt_sk(sk);

	void *data;

	void *data = &val;

	struct tpacket_stats st;

	union tpacket_stats_u st_u;
@@ -3242,14 +3242,9 @@ static int packet_getsockopt(struct socket *sock, int level, int optname, 


	switch (optname) {

	case PACKET_STATISTICS:

		if (po->tp_version == TPACKET_V3) {

			len = sizeof(struct tpacket_stats_v3);

		} else {

			if (len > sizeof(struct tpacket_stats))

				len = sizeof(struct tpacket_stats);

		}

		spin_lock_bh(&sk->sk_receive_queue.lock);

		if (po->tp_version == TPACKET_V3) {

			lv = sizeof(struct tpacket_stats_v3);

			memcpy(&st_u.stats3, &po->stats,

			       sizeof(struct tpacket_stats));

			st_u.stats3.tp_freeze_q_cnt =
@@ -3257,6 +3252,7 @@ static int packet_getsockopt(struct socket *sock, int level, int optname, 
			st_u.stats3.tp_packets += po->stats.tp_drops;

			data = &st_u.stats3;

		} else {

			lv = sizeof(struct tpacket_stats);

			st = po->stats;

			st.tp_packets += st.tp_drops;

			data = &st;
@@ -3265,31 +3261,16 @@ static int packet_getsockopt(struct socket *sock, int level, int optname, 
		spin_unlock_bh(&sk->sk_receive_queue.lock);

		break;

	case PACKET_AUXDATA:

		if (len > sizeof(int))

			len = sizeof(int);

		val = po->auxdata;



		data = &val;

		break;

	case PACKET_ORIGDEV:

		if (len > sizeof(int))

			len = sizeof(int);

		val = po->origdev;



		data = &val;

		break;

	case PACKET_VNET_HDR:

		if (len > sizeof(int))

			len = sizeof(int);

		val = po->has_vnet_hdr;



		data = &val;

		break;

	case PACKET_VERSION:

		if (len > sizeof(int))

			len = sizeof(int);

		val = po->tp_version;

		data = &val;

		break;

	case PACKET_HDRLEN:

		if (len > sizeof(int))
@@ -3309,39 +3290,28 @@ static int packet_getsockopt(struct socket *sock, int level, int optname, 
		default:

			return -EINVAL;

		}

		data = &val;

		break;

	case PACKET_RESERVE:

		if (len > sizeof(unsigned int))

			len = sizeof(unsigned int);

		val = po->tp_reserve;

		data = &val;

		break;

	case PACKET_LOSS:

		if (len > sizeof(unsigned int))

			len = sizeof(unsigned int);

		val = po->tp_loss;

		data = &val;

		break;

	case PACKET_TIMESTAMP:

		if (len > sizeof(int))

			len = sizeof(int);

		val = po->tp_tstamp;

		data = &val;

		break;

	case PACKET_FANOUT:

		if (len > sizeof(int))

			len = sizeof(int);

		val = (po->fanout ?

		       ((u32)po->fanout->id |

			((u32)po->fanout->type << 16)) :

		       0);

		data = &val;

		break;

	default:

		return -ENOPROTOOPT;

	}



	if (len > lv)

		len = lv;

	if (put_user(len, optlen))

		return -EFAULT;

	if (copy_to_user(optval, data, len))