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[ICMP]: Store sock rather than socket for ICMP flow control. 

Basically, there is no difference, what to store: socket or sock. Though,
sock looks better as there will be 1 less dereferrence on the fast path.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Denis V. Lunev 2008-02-29 11:16:08 -08:00 committed by David S. Miller
parent 1e3cf6834e
commit b7e729c4b4
2 changed files with 26 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
net/ipv4/icmp.c
View File

@ -229,14 +229,14 @@ static const struct icmp_control icmp_pointers[NR_ICMP_TYPES+1];
* *
* On SMP we have one ICMP socket per-cpu. * On SMP we have one ICMP socket per-cpu.
*/ */
static DEFINE_PER_CPU(struct socket *, __icmp_socket) = NULL; static DEFINE_PER_CPU(struct sock *, __icmp_sk) = NULL;
#define icmp_socket __get_cpu_var(__icmp_socket) #define icmp_sk __get_cpu_var(__icmp_sk)
static inline int icmp_xmit_lock(void) static inline int icmp_xmit_lock(void)
{ {
local_bh_disable(); local_bh_disable();
if (unlikely(!spin_trylock(&icmp_socket->sk->sk_lock.slock))) { if (unlikely(!spin_trylock(&icmp_sk->sk_lock.slock))) {
/* This can happen if the output path signals a /* This can happen if the output path signals a
* dst_link_failure() for an outgoing ICMP packet. * dst_link_failure() for an outgoing ICMP packet.
*/ */
@ -248,7 +248,7 @@ static inline int icmp_xmit_lock(void)
static inline void icmp_xmit_unlock(void) static inline void icmp_xmit_unlock(void)
{ {
spin_unlock_bh(&icmp_socket->sk->sk_lock.slock); spin_unlock_bh(&icmp_sk->sk_lock.slock);
} }
/* /*
@ -349,7 +349,7 @@ static void icmp_push_reply(struct icmp_bxm *icmp_param,
struct sock *sk; struct sock *sk;
struct sk_buff *skb; struct sk_buff *skb;
sk = icmp_socket->sk; sk = icmp_sk;
if (ip_append_data(sk, icmp_glue_bits, icmp_param, if (ip_append_data(sk, icmp_glue_bits, icmp_param,
icmp_param->data_len+icmp_param->head_len, icmp_param->data_len+icmp_param->head_len,
icmp_param->head_len, icmp_param->head_len,
@ -378,7 +378,7 @@ static void icmp_push_reply(struct icmp_bxm *icmp_param,
static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb) static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb)
{ {
struct sock *sk = icmp_socket->sk; struct sock *sk = icmp_sk;
struct inet_sock *inet = inet_sk(sk); struct inet_sock *inet = inet_sk(sk);
struct ipcm_cookie ipc; struct ipcm_cookie ipc;
struct rtable *rt = (struct rtable *)skb->dst; struct rtable *rt = (struct rtable *)skb->dst;
@ -546,7 +546,7 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
icmp_param.data.icmph.checksum = 0; icmp_param.data.icmph.checksum = 0;
icmp_param.skb = skb_in; icmp_param.skb = skb_in;
icmp_param.offset = skb_network_offset(skb_in); icmp_param.offset = skb_network_offset(skb_in);
inet_sk(icmp_socket->sk)->tos = tos; inet_sk(icmp_sk)->tos = tos;
ipc.addr = iph->saddr; ipc.addr = iph->saddr;
ipc.opt = &icmp_param.replyopts; ipc.opt = &icmp_param.replyopts;
@ -1146,13 +1146,13 @@ static void __exit icmp_exit(void)
int i; int i;
for_each_possible_cpu(i) { for_each_possible_cpu(i) {
struct socket *sock; struct sock *sk;
sock = per_cpu(__icmp_socket, i); sk = per_cpu(__icmp_sk, i);
if (sock == NULL) if (sk == NULL)
continue; continue;
per_cpu(__icmp_socket, i) = NULL; per_cpu(__icmp_sk, i) = NULL;
sock_release(sock); sock_release(sk->sk_socket);
} }
} }
@ -1169,8 +1169,7 @@ int __init icmp_init(void)
if (err < 0) if (err < 0)
goto fail; goto fail;
per_cpu(__icmp_socket, i) = sock; per_cpu(__icmp_sk, i) = sk = sock->sk;
sk = sock->sk;
sk->sk_allocation = GFP_ATOMIC; sk->sk_allocation = GFP_ATOMIC;
/* Enough space for 2 64K ICMP packets, including /* Enough space for 2 64K ICMP packets, including

25
net/ipv6/icmp.c
View File

@ -80,8 +80,8 @@ EXPORT_SYMBOL(icmpv6msg_statistics);
* *
* On SMP we have one ICMP socket per-cpu. * On SMP we have one ICMP socket per-cpu.
*/ */
static DEFINE_PER_CPU(struct socket *, __icmpv6_socket) = NULL; static DEFINE_PER_CPU(struct sock *, __icmpv6_sk) = NULL;
#define icmpv6_socket __get_cpu_var(__icmpv6_socket) #define icmpv6_sk __get_cpu_var(__icmpv6_sk)
static int icmpv6_rcv(struct sk_buff *skb); static int icmpv6_rcv(struct sk_buff *skb);
@ -94,7 +94,7 @@ static __inline__ int icmpv6_xmit_lock(void)
{ {
local_bh_disable(); local_bh_disable();
if (unlikely(!spin_trylock(&icmpv6_socket->sk->sk_lock.slock))) { if (unlikely(!spin_trylock(&icmpv6_sk->sk_lock.slock))) {
/* This can happen if the output path (f.e. SIT or /* This can happen if the output path (f.e. SIT or
* ip6ip6 tunnel) signals dst_link_failure() for an * ip6ip6 tunnel) signals dst_link_failure() for an
* outgoing ICMP6 packet. * outgoing ICMP6 packet.
@ -107,7 +107,7 @@ static __inline__ int icmpv6_xmit_lock(void)
static __inline__ void icmpv6_xmit_unlock(void) static __inline__ void icmpv6_xmit_unlock(void)
{ {
spin_unlock_bh(&icmpv6_socket->sk->sk_lock.slock); spin_unlock_bh(&icmpv6_sk->sk_lock.slock);
} }
/* /*
@ -392,7 +392,7 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
if (icmpv6_xmit_lock()) if (icmpv6_xmit_lock())
return; return;
sk = icmpv6_socket->sk; sk = icmpv6_sk;
np = inet6_sk(sk); np = inet6_sk(sk);
if (!icmpv6_xrlim_allow(sk, type, &fl)) if (!icmpv6_xrlim_allow(sk, type, &fl))
@ -538,7 +538,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
if (icmpv6_xmit_lock()) if (icmpv6_xmit_lock())
return; return;
sk = icmpv6_socket->sk; sk = icmpv6_sk;
np = inet6_sk(sk); np = inet6_sk(sk);
if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
@ -776,7 +776,7 @@ drop_no_count:
} }
/* /*
* Special lock-class for __icmpv6_socket: * Special lock-class for __icmpv6_sk:
*/ */
static struct lock_class_key icmpv6_socket_sk_dst_lock_key; static struct lock_class_key icmpv6_socket_sk_dst_lock_key;
@ -786,8 +786,9 @@ int __init icmpv6_init(void)
int err, i, j; int err, i, j;
for_each_possible_cpu(i) { for_each_possible_cpu(i) {
struct socket *sock;
err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6,
&per_cpu(__icmpv6_socket, i)); &sock);
if (err < 0) { if (err < 0) {
printk(KERN_ERR printk(KERN_ERR
"Failed to initialize the ICMP6 control socket " "Failed to initialize the ICMP6 control socket "
@ -796,12 +797,12 @@ int __init icmpv6_init(void)
goto fail; goto fail;
} }
sk = per_cpu(__icmpv6_socket, i)->sk; per_cpu(__icmpv6_sk, i) = sk = sock->sk;
sk->sk_allocation = GFP_ATOMIC; sk->sk_allocation = GFP_ATOMIC;
/* /*
* Split off their lock-class, because sk->sk_dst_lock * Split off their lock-class, because sk->sk_dst_lock
* gets used from softirqs, which is safe for * gets used from softirqs, which is safe for
* __icmpv6_socket (because those never get directly used * __icmpv6_sk (because those never get directly used
* via userspace syscalls), but unsafe for normal sockets. * via userspace syscalls), but unsafe for normal sockets.
*/ */
lockdep_set_class(&sk->sk_dst_lock, lockdep_set_class(&sk->sk_dst_lock,
@ -829,7 +830,7 @@ int __init icmpv6_init(void)
for (j = 0; j < i; j++) { for (j = 0; j < i; j++) {
if (!cpu_possible(j)) if (!cpu_possible(j))
continue; continue;
sock_release(per_cpu(__icmpv6_socket, j)); sock_release(per_cpu(__icmpv6_sk, j)->sk_socket);
} }
return err; return err;
@ -840,7 +841,7 @@ void icmpv6_cleanup(void)
int i; int i;
for_each_possible_cpu(i) { for_each_possible_cpu(i) {
sock_release(per_cpu(__icmpv6_socket, i)); sock_release(per_cpu(__icmpv6_sk, i)->sk_socket);
} }
inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6); inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
} }