Release 4.11 net/packet/internal.h

#ifndef __PACKET_INTERNAL_H__

#define __PACKET_INTERNAL_H__


struct packet_mclist {
	
struct packet_mclist	*next;
	
int			ifindex;
	
int			count;
	
unsigned short		type;
	
unsigned short		alen;
	
unsigned char		addr[MAX_ADDR_LEN];
};

/* kbdq - kernel block descriptor queue */

struct tpacket_kbdq_core {
	
struct pgv	*pkbdq;
	
unsigned int	feature_req_word;
	
unsigned int	hdrlen;
	
unsigned char	reset_pending_on_curr_blk;
	
unsigned char   delete_blk_timer;
	
unsigned short	kactive_blk_num;
	
unsigned short	blk_sizeof_priv;

	/* last_kactive_blk_num:
         * trick to see if user-space has caught up
         * in order to avoid refreshing timer when every single pkt arrives.
         */
	
unsigned short	last_kactive_blk_num;

	
char		*pkblk_start;
	
char		*pkblk_end;
	
int		kblk_size;
	
unsigned int	max_frame_len;
	
unsigned int	knum_blocks;
	
uint64_t	knxt_seq_num;
	
char		*prev;
	
char		*nxt_offset;
	
struct sk_buff	*skb;

	
atomic_t	blk_fill_in_prog;

	/* Default is set to 8ms */

#define DEFAULT_PRB_RETIRE_TOV	(8)

	
unsigned short  retire_blk_tov;
	
unsigned short  version;
	
unsigned long	tov_in_jiffies;

	/* timer to retire an outstanding block */
	
struct timer_list retire_blk_timer;
};


struct pgv {
	
char *buffer;
};


struct packet_ring_buffer {
	
struct pgv		*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;

	
unsigned int __percpu	*pending_refcnt;

	
struct tpacket_kbdq_core	prb_bdqc;
};

extern struct mutex fanout_mutex;

#define PACKET_FANOUT_MAX	256


struct packet_fanout {
	
possible_net_t		net;
	
unsigned int		num_members;
	
u16			id;
	
u8			type;
	
u8			flags;
	union {
		
atomic_t		rr_cur;
		
struct bpf_prog __rcu	*bpf_prog;
	};
	
struct list_head	list;
	
struct sock		*arr[PACKET_FANOUT_MAX];
	
spinlock_t		lock;
	
atomic_t		sk_ref;
	
struct packet_type	prot_hook ____cacheline_aligned_in_smp;
};


struct packet_rollover {
	
int			sock;
	
struct rcu_head		rcu;
	
atomic_long_t		num;
	
atomic_long_t		num_huge;
	
atomic_long_t		num_failed;

#define ROLLOVER_HLEN	(L1_CACHE_BYTES / sizeof(u32))
	
u32			history[ROLLOVER_HLEN] ____cacheline_aligned;
} 
____cacheline_aligned_in_smp;


struct packet_sock {
	/* struct sock has to be the first member of packet_sock */
	
struct sock		sk;
	
struct packet_fanout	*fanout;
	
union  tpacket_stats_u	stats;
	
struct packet_ring_buffer	rx_ring;
	
struct packet_ring_buffer	tx_ring;
	
int			copy_thresh;
	
spinlock_t		bind_lock;
	
struct mutex		pg_vec_lock;
	
unsigned int		running:1,	/* prot_hook is attached*/
				
auxdata:1,
				
origdev:1,
				
has_vnet_hdr:1;
	
int			pressure;
	
int			ifindex;	/* bound device         */
	
__be16			num;
	
struct packet_rollover	*rollover;
	
struct packet_mclist	*mclist;
	
atomic_t		mapped;
	
enum tpacket_versions	tp_version;
	
unsigned int		tp_hdrlen;
	
unsigned int		tp_reserve;
	
unsigned int		tp_loss:1;
	
unsigned int		tp_tx_has_off:1;
	
unsigned int		tp_tstamp;
	
struct net_device __rcu	*cached_dev;
	
int			(*xmit)(struct sk_buff *skb);
	
struct packet_type	prot_hook ____cacheline_aligned_in_smp;
};



static struct packet_sock *pkt_sk(struct sock *sk)
{
	return (struct packet_sock *)sk;
}

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#endif
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Directory: net/packet

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