af_packet: packet_getsockopt() cleanup
Factorize code, since most fetched values are int type. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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900f65d361
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c06fff6e17
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@ -3224,10 +3224,10 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
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char __user *optval, int __user *optlen)
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char __user *optval, int __user *optlen)
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{
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{
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int len;
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int len;
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int val;
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int val, lv = sizeof(val);
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struct sock *sk = sock->sk;
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struct sock *sk = sock->sk;
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struct packet_sock *po = pkt_sk(sk);
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struct packet_sock *po = pkt_sk(sk);
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void *data;
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void *data = &val;
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struct tpacket_stats st;
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struct tpacket_stats st;
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union tpacket_stats_u st_u;
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union tpacket_stats_u st_u;
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@ -3242,21 +3242,17 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
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switch (optname) {
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switch (optname) {
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case PACKET_STATISTICS:
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case PACKET_STATISTICS:
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if (po->tp_version == TPACKET_V3) {
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len = sizeof(struct tpacket_stats_v3);
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} else {
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if (len > sizeof(struct tpacket_stats))
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len = sizeof(struct tpacket_stats);
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}
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spin_lock_bh(&sk->sk_receive_queue.lock);
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spin_lock_bh(&sk->sk_receive_queue.lock);
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if (po->tp_version == TPACKET_V3) {
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if (po->tp_version == TPACKET_V3) {
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lv = sizeof(struct tpacket_stats_v3);
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memcpy(&st_u.stats3, &po->stats,
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memcpy(&st_u.stats3, &po->stats,
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sizeof(struct tpacket_stats));
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sizeof(struct tpacket_stats));
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st_u.stats3.tp_freeze_q_cnt =
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st_u.stats3.tp_freeze_q_cnt =
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po->stats_u.stats3.tp_freeze_q_cnt;
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po->stats_u.stats3.tp_freeze_q_cnt;
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st_u.stats3.tp_packets += po->stats.tp_drops;
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st_u.stats3.tp_packets += po->stats.tp_drops;
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data = &st_u.stats3;
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data = &st_u.stats3;
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} else {
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} else {
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lv = sizeof(struct tpacket_stats);
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st = po->stats;
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st = po->stats;
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st.tp_packets += st.tp_drops;
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st.tp_packets += st.tp_drops;
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data = &st;
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data = &st;
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@ -3265,31 +3261,16 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
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spin_unlock_bh(&sk->sk_receive_queue.lock);
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spin_unlock_bh(&sk->sk_receive_queue.lock);
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break;
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break;
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case PACKET_AUXDATA:
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case PACKET_AUXDATA:
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if (len > sizeof(int))
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len = sizeof(int);
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val = po->auxdata;
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val = po->auxdata;
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data = &val;
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break;
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break;
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case PACKET_ORIGDEV:
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case PACKET_ORIGDEV:
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if (len > sizeof(int))
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len = sizeof(int);
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val = po->origdev;
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val = po->origdev;
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data = &val;
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break;
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break;
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case PACKET_VNET_HDR:
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case PACKET_VNET_HDR:
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if (len > sizeof(int))
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len = sizeof(int);
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val = po->has_vnet_hdr;
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val = po->has_vnet_hdr;
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data = &val;
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break;
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break;
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case PACKET_VERSION:
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case PACKET_VERSION:
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if (len > sizeof(int))
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len = sizeof(int);
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val = po->tp_version;
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val = po->tp_version;
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data = &val;
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break;
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break;
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case PACKET_HDRLEN:
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case PACKET_HDRLEN:
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if (len > sizeof(int))
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if (len > sizeof(int))
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@ -3309,39 +3290,28 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
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default:
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default:
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return -EINVAL;
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return -EINVAL;
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}
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}
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data = &val;
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break;
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break;
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case PACKET_RESERVE:
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case PACKET_RESERVE:
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if (len > sizeof(unsigned int))
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len = sizeof(unsigned int);
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val = po->tp_reserve;
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val = po->tp_reserve;
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data = &val;
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break;
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break;
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case PACKET_LOSS:
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case PACKET_LOSS:
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if (len > sizeof(unsigned int))
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len = sizeof(unsigned int);
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val = po->tp_loss;
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val = po->tp_loss;
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data = &val;
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break;
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break;
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case PACKET_TIMESTAMP:
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case PACKET_TIMESTAMP:
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if (len > sizeof(int))
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len = sizeof(int);
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val = po->tp_tstamp;
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val = po->tp_tstamp;
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data = &val;
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break;
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break;
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case PACKET_FANOUT:
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case PACKET_FANOUT:
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if (len > sizeof(int))
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len = sizeof(int);
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val = (po->fanout ?
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val = (po->fanout ?
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((u32)po->fanout->id |
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((u32)po->fanout->id |
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((u32)po->fanout->type << 16)) :
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((u32)po->fanout->type << 16)) :
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0);
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0);
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data = &val;
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break;
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break;
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default:
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default:
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return -ENOPROTOOPT;
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return -ENOPROTOOPT;
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}
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}
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if (len > lv)
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len = lv;
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if (put_user(len, optlen))
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if (put_user(len, optlen))
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return -EFAULT;
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return -EFAULT;
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if (copy_to_user(optval, data, len))
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if (copy_to_user(optval, data, len))
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