forked from luck/tmp_suning_uos_patched
udp: Neaten and reduce size of compute_score functions
The compute_score functions are a bit difficult to read. Neaten them a bit to reduce object sizes and make them a bit more intelligible. Return early to avoid indentation and avoid unnecessary initializations. (allyesconfig, but w/ -O2 and no profiling) $ size net/ipv[46]/udp.o.* text data bss dec hex filename 28680 1184 25 29889 74c1 net/ipv4/udp.o.new 28756 1184 25 29965 750d net/ipv4/udp.o.old 17600 1010 2 18612 48b4 net/ipv6/udp.o.new 17632 1010 2 18644 48d4 net/ipv6/udp.o.old Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joe Perches
David S. Miller
parent
b0ba512e25
commit
60c04aecd8
115
net/ipv4/udp.c
115
net/ipv4/udp.c
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@ -336,38 +336,45 @@ int udp_v4_get_port(struct sock *sk, unsigned short snum)
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return udp_lib_get_port(sk, snum, ipv4_rcv_saddr_equal, hash2_nulladdr);
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}
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static inline int compute_score(struct sock *sk, struct net *net, __be32 saddr,
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unsigned short hnum,
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__be16 sport, __be32 daddr, __be16 dport, int dif)
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static inline int compute_score(struct sock *sk, struct net *net,
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__be32 saddr, unsigned short hnum, __be16 sport,
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__be32 daddr, __be16 dport, int dif)
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{
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int score = -1;
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int score;
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struct inet_sock *inet;
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if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum &&
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!ipv6_only_sock(sk)) {
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struct inet_sock *inet = inet_sk(sk);
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if (!net_eq(sock_net(sk), net) ||
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udp_sk(sk)->udp_port_hash != hnum ||
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ipv6_only_sock(sk))
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return -1;
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score = (sk->sk_family == PF_INET ? 2 : 1);
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if (inet->inet_rcv_saddr) {
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if (inet->inet_rcv_saddr != daddr)
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return -1;
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score += 4;
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}
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if (inet->inet_daddr) {
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if (inet->inet_daddr != saddr)
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return -1;
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score += 4;
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}
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if (inet->inet_dport) {
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if (inet->inet_dport != sport)
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return -1;
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score += 4;
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}
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if (sk->sk_bound_dev_if) {
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if (sk->sk_bound_dev_if != dif)
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return -1;
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score += 4;
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}
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score = (sk->sk_family == PF_INET) ? 2 : 1;
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inet = inet_sk(sk);
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if (inet->inet_rcv_saddr) {
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if (inet->inet_rcv_saddr != daddr)
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return -1;
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score += 4;
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}
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if (inet->inet_daddr) {
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if (inet->inet_daddr != saddr)
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return -1;
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score += 4;
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}
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if (inet->inet_dport) {
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if (inet->inet_dport != sport)
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return -1;
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score += 4;
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}
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if (sk->sk_bound_dev_if) {
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if (sk->sk_bound_dev_if != dif)
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return -1;
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score += 4;
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}
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return score;
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}
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@ -378,33 +385,39 @@ static inline int compute_score2(struct sock *sk, struct net *net,
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__be32 saddr, __be16 sport,
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__be32 daddr, unsigned int hnum, int dif)
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{
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int score = -1;
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int score;
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struct inet_sock *inet;
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if (net_eq(sock_net(sk), net) && !ipv6_only_sock(sk)) {
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struct inet_sock *inet = inet_sk(sk);
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if (!net_eq(sock_net(sk), net) ||
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ipv6_only_sock(sk))
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return -1;
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if (inet->inet_rcv_saddr != daddr)
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inet = inet_sk(sk);
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if (inet->inet_rcv_saddr != daddr ||
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inet->inet_num != hnum)
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return -1;
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score = (sk->sk_family == PF_INET) ? 2 : 1;
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if (inet->inet_daddr) {
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if (inet->inet_daddr != saddr)
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return -1;
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if (inet->inet_num != hnum)
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return -1;
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score = (sk->sk_family == PF_INET ? 2 : 1);
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if (inet->inet_daddr) {
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if (inet->inet_daddr != saddr)
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return -1;
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score += 4;
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}
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if (inet->inet_dport) {
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if (inet->inet_dport != sport)
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return -1;
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score += 4;
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}
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if (sk->sk_bound_dev_if) {
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if (sk->sk_bound_dev_if != dif)
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return -1;
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score += 4;
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}
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score += 4;
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}
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if (inet->inet_dport) {
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if (inet->inet_dport != sport)
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return -1;
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score += 4;
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}
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if (sk->sk_bound_dev_if) {
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if (sk->sk_bound_dev_if != dif)
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return -1;
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score += 4;
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}
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return score;
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}
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113
net/ipv6/udp.c
113
net/ipv6/udp.c
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@ -148,72 +148,85 @@ static inline int compute_score(struct sock *sk, struct net *net,
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const struct in6_addr *daddr, __be16 dport,
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int dif)
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{
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int score = -1;
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int score;
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struct inet_sock *inet;
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if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum &&
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sk->sk_family == PF_INET6) {
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struct inet_sock *inet = inet_sk(sk);
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if (!net_eq(sock_net(sk), net) ||
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udp_sk(sk)->udp_port_hash != hnum ||
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sk->sk_family != PF_INET6)
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return -1;
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score = 0;
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if (inet->inet_dport) {
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if (inet->inet_dport != sport)
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return -1;
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score++;
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}
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if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
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if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr))
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return -1;
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score++;
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}
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if (!ipv6_addr_any(&sk->sk_v6_daddr)) {
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if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr))
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return -1;
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score++;
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}
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if (sk->sk_bound_dev_if) {
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if (sk->sk_bound_dev_if != dif)
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return -1;
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score++;
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}
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score = 0;
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inet = inet_sk(sk);
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if (inet->inet_dport) {
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if (inet->inet_dport != sport)
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return -1;
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score++;
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}
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if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
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if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr))
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return -1;
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score++;
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}
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if (!ipv6_addr_any(&sk->sk_v6_daddr)) {
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if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr))
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return -1;
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score++;
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}
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if (sk->sk_bound_dev_if) {
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if (sk->sk_bound_dev_if != dif)
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return -1;
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score++;
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}
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return score;
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}
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#define SCORE2_MAX (1 + 1 + 1)
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static inline int compute_score2(struct sock *sk, struct net *net,
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const struct in6_addr *saddr, __be16 sport,
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const struct in6_addr *daddr, unsigned short hnum,
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int dif)
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const struct in6_addr *saddr, __be16 sport,
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const struct in6_addr *daddr,
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unsigned short hnum, int dif)
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{
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int score = -1;
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int score;
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struct inet_sock *inet;
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if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum &&
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sk->sk_family == PF_INET6) {
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struct inet_sock *inet = inet_sk(sk);
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if (!net_eq(sock_net(sk), net) ||
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udp_sk(sk)->udp_port_hash != hnum ||
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sk->sk_family != PF_INET6)
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return -1;
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if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr))
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if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr))
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return -1;
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score = 0;
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inet = inet_sk(sk);
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if (inet->inet_dport) {
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if (inet->inet_dport != sport)
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return -1;
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score = 0;
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if (inet->inet_dport) {
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if (inet->inet_dport != sport)
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return -1;
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score++;
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}
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if (!ipv6_addr_any(&sk->sk_v6_daddr)) {
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if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr))
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return -1;
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score++;
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}
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if (sk->sk_bound_dev_if) {
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if (sk->sk_bound_dev_if != dif)
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return -1;
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score++;
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}
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score++;
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}
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if (!ipv6_addr_any(&sk->sk_v6_daddr)) {
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if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr))
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return -1;
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score++;
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}
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if (sk->sk_bound_dev_if) {
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if (sk->sk_bound_dev_if != dif)
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return -1;
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score++;
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}
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return score;
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}
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/* called with read_rcu_lock() */
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static struct sock *udp6_lib_lookup2(struct net *net,
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const struct in6_addr *saddr, __be16 sport,
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