Commit 2787b04b authored by Pavel Emelyanov's avatar Pavel Emelyanov Committed by David S. Miller
Browse files

packet: Introduce net/packet/internal.h header 



The diag module will need to access some private packet_sock data, so
move it to a header in advance. This file will be shared between the
af_packet.c and the diag.c

Signed-off-by: default avatarPavel Emelyanov <xemul@parallels.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ad5b3102

net/packet/af_packet.c

+2 −97
Original line number Diff line number Diff line
@@ -93,6 +93,8 @@ 
#include <net/inet_common.h>

#endif



#include "internal.h"



/*

   Assumptions:

   - if device has no dev->hard_header routine, it adds and removes ll header
@@ -146,14 +148,6 @@ dev->hard_header == NULL (ll header is added by device, we cannot control it) 


/* Private packet socket structures. */



struct packet_mclist {

	struct packet_mclist	*next;

	int			ifindex;

	int			count;

	unsigned short		type;

	unsigned short		alen;

	unsigned char		addr[MAX_ADDR_LEN];

};

/* identical to struct packet_mreq except it has

 * a longer address field.

 */
@@ -175,63 +169,7 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u, 
#define BLK_PLUS_PRIV(sz_of_priv) \

	(BLK_HDR_LEN + ALIGN((sz_of_priv), V3_ALIGNMENT))



/* 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	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;

};



#define PGV_FROM_VMALLOC 1

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;



	struct tpacket_kbdq_core	prb_bdqc;

	atomic_t		pending;

};



#define BLOCK_STATUS(x)	((x)->hdr.bh1.block_status)

#define BLOCK_NUM_PKTS(x)	((x)->hdr.bh1.num_pkts)
@@ -269,34 +207,6 @@ static void prb_fill_vlan_info(struct tpacket_kbdq_core *, 
		struct tpacket3_hdr *);

static void packet_flush_mclist(struct sock *sk);



struct packet_fanout;

struct packet_sock {

	/* struct sock has to be the first member of packet_sock */

	struct sock		sk;

	struct packet_fanout	*fanout;

	struct tpacket_stats	stats;

	union  tpacket_stats_u	stats_u;

	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			ifindex;	/* bound device		*/

	__be16			num;

	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_tstamp;

	struct packet_type	prot_hook ____cacheline_aligned_in_smp;

};



#define PACKET_FANOUT_MAX	256



struct packet_fanout {
@@ -334,11 +244,6 @@ struct packet_skb_cb { 
	(((x)->kactive_blk_num < ((x)->knum_blocks-1)) ? \

	((x)->kactive_blk_num+1) : 0)



static struct packet_sock *pkt_sk(struct sock *sk)

{

	return (struct packet_sock *)sk;

}



static void __fanout_unlink(struct sock *sk, struct packet_sock *po);

static void __fanout_link(struct sock *sk, struct packet_sock *po);

net/packet/internal.h

0 → 100644
+103 −0
Original line number Diff line number Diff line 
#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	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;



	struct tpacket_kbdq_core	prb_bdqc;

	atomic_t		pending;

};



struct packet_fanout;

struct packet_sock {

	/* struct sock has to be the first member of packet_sock */

	struct sock		sk;

	struct packet_fanout	*fanout;

	struct tpacket_stats	stats;

	union  tpacket_stats_u	stats_u;

	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			ifindex;	/* bound device		*/

	__be16			num;

	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_tstamp;

	struct packet_type	prot_hook ____cacheline_aligned_in_smp;

};



static struct packet_sock *pkt_sk(struct sock *sk)

{

	return (struct packet_sock *)sk;

}



#endif

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