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[RAW]: Introduce raw_hashinfo structure

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The ipv4/raw.c and ipv6/raw.c contain many common code (most
of which is proc interface) which can be consolidated.

Most of the places to consolidate deal with the raw sockets
hashtable, so introduce a struct raw_hashinfo which describes
the raw sockets hash.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2007-11-19 22:36:45 -08:00 • committed by David S. Miller
parent 69d6da0b0f
commit b673e4dfc8
3 changed files with 57 additions and 49 deletions
Download patch file Download diff file Expand all files Collapse all files

50
net/ipv4/raw.c
View file

@ -80,28 +80,27 @@
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#define RAWV4_HTABLE_SIZE MAX_INET_PROTOS
static struct hlist_head raw_v4_htable[RAWV4_HTABLE_SIZE];
static DEFINE_RWLOCK(raw_v4_lock);
static struct raw_hashinfo raw_v4_hashinfo = {
.lock = __RW_LOCK_UNLOCKED(),
};
static void raw_v4_hash(struct sock *sk)
{
struct hlist_head *head = &raw_v4_htable[inet_sk(sk)->num &
(RAWV4_HTABLE_SIZE - 1)];
struct hlist_head *head = &raw_v4_hashinfo.ht[inet_sk(sk)->num &
(RAW_HTABLE_SIZE - 1)];
write_lock_bh(&raw_v4_lock);
write_lock_bh(&raw_v4_hashinfo.lock);
sk_add_node(sk, head);
sock_prot_inc_use(sk->sk_prot);
write_unlock_bh(&raw_v4_lock);
write_unlock_bh(&raw_v4_hashinfo.lock);
}
static void raw_v4_unhash(struct sock *sk)
{
write_lock_bh(&raw_v4_lock);
write_lock_bh(&raw_v4_hashinfo.lock);
if (sk_del_node_init(sk))
sock_prot_dec_use(sk->sk_prot);
write_unlock_bh(&raw_v4_lock);
write_unlock_bh(&raw_v4_hashinfo.lock);
}
static struct sock *__raw_v4_lookup(struct sock *sk, unsigned short num,
@ -158,8 +157,8 @@ static int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
struct hlist_head *head;
int delivered = 0;
read_lock(&raw_v4_lock);
head = &raw_v4_htable[hash];
read_lock(&raw_v4_hashinfo.lock);
head = &raw_v4_hashinfo.ht[hash];
if (hlist_empty(head))
goto out;
sk = __raw_v4_lookup(__sk_head(head), iph->protocol,
@ -180,7 +179,7 @@ static int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
skb->dev->ifindex);
}
out:
read_unlock(&raw_v4_lock);
read_unlock(&raw_v4_hashinfo.lock);
return delivered;
}
@ -189,8 +188,8 @@ int raw_local_deliver(struct sk_buff *skb, int protocol)
int hash;
struct sock *raw_sk;
hash = protocol & (RAWV4_HTABLE_SIZE - 1);
raw_sk = sk_head(&raw_v4_htable[hash]);
hash = protocol & (RAW_HTABLE_SIZE - 1);
raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
/* If there maybe a raw socket we must check - if not we
* don't care less
@ -262,10 +261,10 @@ void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
struct sock *raw_sk;
struct iphdr *iph;
hash = protocol & (RAWV4_HTABLE_SIZE - 1);
hash = protocol & (RAW_HTABLE_SIZE - 1);
read_lock(&raw_v4_lock);
raw_sk = sk_head(&raw_v4_htable[hash]);
read_lock(&raw_v4_hashinfo.lock);
raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
if (raw_sk != NULL) {
iph = (struct iphdr *)skb->data;
while ((raw_sk = __raw_v4_lookup(raw_sk, protocol, iph->daddr,
@ -276,7 +275,7 @@ void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info)
iph = (struct iphdr *)skb->data;
}
}
read_unlock(&raw_v4_lock);
read_unlock(&raw_v4_hashinfo.lock);
}
static int raw_rcv_skb(struct sock * sk, struct sk_buff * skb)
@ -844,10 +843,11 @@ static struct sock *raw_get_first(struct seq_file *seq)
struct sock *sk;
struct raw_iter_state* state = raw_seq_private(seq);
for (state->bucket = 0; state->bucket < RAWV4_HTABLE_SIZE; ++state->bucket) {
for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE;
++state->bucket) {
struct hlist_node *node;
sk_for_each(sk, node, &raw_v4_htable[state->bucket])
sk_for_each(sk, node, &raw_v4_hashinfo.ht[state->bucket])
if (sk->sk_family == PF_INET)
goto found;
}
@ -866,8 +866,8 @@ try_again:
;
} while (sk && sk->sk_family != PF_INET);
if (!sk && ++state->bucket < RAWV4_HTABLE_SIZE) {
sk = sk_head(&raw_v4_htable[state->bucket]);
if (!sk && ++state->bucket < RAW_HTABLE_SIZE) {
sk = sk_head(&raw_v4_hashinfo.ht[state->bucket]);
goto try_again;
}
return sk;
@ -885,7 +885,7 @@ static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos)
static void *raw_seq_start(struct seq_file *seq, loff_t *pos)
{
read_lock(&raw_v4_lock);
read_lock(&raw_v4_hashinfo.lock);
return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
}
@ -903,7 +903,7 @@ static void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos)
static void raw_seq_stop(struct seq_file *seq, void *v)
{
read_unlock(&raw_v4_lock);
read_unlock(&raw_v4_hashinfo.lock);
}
static __inline__ char *get_raw_sock(struct sock *sp, char *tmpbuf, int i)