16b304f340
Following patch stores struct netlink_callback in netlink_sock to avoid allocating and freeing it on every netlink dump msg. Only one dump operation is allowed for a given socket at a time therefore we can safely convert cb pointer to cb struct inside netlink_sock. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
85 lines
1.8 KiB
C
85 lines
1.8 KiB
C
#ifndef _AF_NETLINK_H
|
|
#define _AF_NETLINK_H
|
|
|
|
#include <net/sock.h>
|
|
|
|
#define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
|
|
#define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long))
|
|
|
|
struct netlink_ring {
|
|
void **pg_vec;
|
|
unsigned int head;
|
|
unsigned int frames_per_block;
|
|
unsigned int frame_size;
|
|
unsigned int frame_max;
|
|
|
|
unsigned int pg_vec_order;
|
|
unsigned int pg_vec_pages;
|
|
unsigned int pg_vec_len;
|
|
|
|
atomic_t pending;
|
|
};
|
|
|
|
struct netlink_sock {
|
|
/* struct sock has to be the first member of netlink_sock */
|
|
struct sock sk;
|
|
u32 portid;
|
|
u32 dst_portid;
|
|
u32 dst_group;
|
|
u32 flags;
|
|
u32 subscriptions;
|
|
u32 ngroups;
|
|
unsigned long *groups;
|
|
unsigned long state;
|
|
wait_queue_head_t wait;
|
|
bool cb_running;
|
|
struct netlink_callback cb;
|
|
struct mutex *cb_mutex;
|
|
struct mutex cb_def_mutex;
|
|
void (*netlink_rcv)(struct sk_buff *skb);
|
|
void (*netlink_bind)(int group);
|
|
struct module *module;
|
|
#ifdef CONFIG_NETLINK_MMAP
|
|
struct mutex pg_vec_lock;
|
|
struct netlink_ring rx_ring;
|
|
struct netlink_ring tx_ring;
|
|
atomic_t mapped;
|
|
#endif /* CONFIG_NETLINK_MMAP */
|
|
};
|
|
|
|
static inline struct netlink_sock *nlk_sk(struct sock *sk)
|
|
{
|
|
return container_of(sk, struct netlink_sock, sk);
|
|
}
|
|
|
|
struct nl_portid_hash {
|
|
struct hlist_head *table;
|
|
unsigned long rehash_time;
|
|
|
|
unsigned int mask;
|
|
unsigned int shift;
|
|
|
|
unsigned int entries;
|
|
unsigned int max_shift;
|
|
|
|
u32 rnd;
|
|
};
|
|
|
|
struct netlink_table {
|
|
struct nl_portid_hash hash;
|
|
struct hlist_head mc_list;
|
|
struct listeners __rcu *listeners;
|
|
unsigned int flags;
|
|
unsigned int groups;
|
|
struct mutex *cb_mutex;
|
|
struct module *module;
|
|
void (*bind)(int group);
|
|
bool (*compare)(struct net *net, struct sock *sock);
|
|
int registered;
|
|
};
|
|
|
|
extern struct netlink_table *nl_table;
|
|
extern rwlock_t nl_table_lock;
|
|
|
|
#endif
|