From 1e3cf6834e7db1eac94314338c9e30c2103ac409 Mon Sep 17 00:00:00 2001 From: "Denis V. Lunev" Date: Fri, 29 Feb 2008 11:15:42 -0800 Subject: [PATCH] [ICMP]: Optimize icmp_socket usage. Use this macro only once in a function to save a bit of space. add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-98 (-98) function old new delta icmp_reply 562 561 -1 icmp_push_reply 305 258 -47 icmp_init 273 223 -50 Signed-off-by: Denis V. Lunev Acked-by: Daniel Lezcano Signed-off-by: David S. Miller --- net/ipv4/icmp.c | 29 +++++++++++++++++------------ 1 file changed, 17 insertions(+), 12 deletions(-) diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index b345b3d9bcaa..831b6adbe4e0 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -346,19 +346,21 @@ static int icmp_glue_bits(void *from, char *to, int offset, int len, int odd, static void icmp_push_reply(struct icmp_bxm *icmp_param, struct ipcm_cookie *ipc, struct rtable *rt) { + struct sock *sk; struct sk_buff *skb; - if (ip_append_data(icmp_socket->sk, icmp_glue_bits, icmp_param, + sk = icmp_socket->sk; + if (ip_append_data(sk, icmp_glue_bits, icmp_param, icmp_param->data_len+icmp_param->head_len, icmp_param->head_len, ipc, rt, MSG_DONTWAIT) < 0) - ip_flush_pending_frames(icmp_socket->sk); - else if ((skb = skb_peek(&icmp_socket->sk->sk_write_queue)) != NULL) { + ip_flush_pending_frames(sk); + else if ((skb = skb_peek(&sk->sk_write_queue)) != NULL) { struct icmphdr *icmph = icmp_hdr(skb); __wsum csum = 0; struct sk_buff *skb1; - skb_queue_walk(&icmp_socket->sk->sk_write_queue, skb1) { + skb_queue_walk(&sk->sk_write_queue, skb1) { csum = csum_add(csum, skb1->csum); } csum = csum_partial_copy_nocheck((void *)&icmp_param->data, @@ -366,7 +368,7 @@ static void icmp_push_reply(struct icmp_bxm *icmp_param, icmp_param->head_len, csum); icmph->checksum = csum_fold(csum); skb->ip_summed = CHECKSUM_NONE; - ip_push_pending_frames(icmp_socket->sk); + ip_push_pending_frames(sk); } } @@ -1156,25 +1158,28 @@ static void __exit icmp_exit(void) int __init icmp_init(void) { - struct inet_sock *inet; int i, err; for_each_possible_cpu(i) { - err = sock_create_kern(PF_INET, SOCK_RAW, IPPROTO_ICMP, - &per_cpu(__icmp_socket, i)); + struct sock *sk; + struct socket *sock; + struct inet_sock *inet; + err = sock_create_kern(PF_INET, SOCK_RAW, IPPROTO_ICMP, &sock); if (err < 0) goto fail; - per_cpu(__icmp_socket, i)->sk->sk_allocation = GFP_ATOMIC; + per_cpu(__icmp_socket, i) = sock; + sk = sock->sk; + sk->sk_allocation = GFP_ATOMIC; /* Enough space for 2 64K ICMP packets, including * sk_buff struct overhead. */ - per_cpu(__icmp_socket, i)->sk->sk_sndbuf = + sk->sk_sndbuf = (2 * ((64 * 1024) + sizeof(struct sk_buff))); - inet = inet_sk(per_cpu(__icmp_socket, i)->sk); + inet = inet_sk(sk); inet->uc_ttl = -1; inet->pmtudisc = IP_PMTUDISC_DONT; @@ -1182,7 +1187,7 @@ int __init icmp_init(void) * see it, we do not wish this socket to see incoming * packets. */ - per_cpu(__icmp_socket, i)->sk->sk_prot->unhash(per_cpu(__icmp_socket, i)->sk); + sk->sk_prot->unhash(sk); } return 0; -- 2.39.5