cregit-Linux how code gets into the kernel

Release 4.12 include/net/llc.h

Directory: include/net
#ifndef LLC_H

#define LLC_H
/*
 * Copyright (c) 1997 by Procom Technology, Inc.
 *               2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 *
 * This program can be redistributed or modified under the terms of the
 * GNU General Public License as published by the Free Software Foundation.
 * This program is distributed without any warranty or implied warranty
 * of merchantability or fitness for a particular purpose.
 *
 * See the GNU General Public License for more details.
 */

#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/rculist_nulls.h>
#include <linux/hash.h>
#include <linux/jhash.h>

#include <linux/atomic.h>

struct net_device;
struct packet_type;
struct sk_buff;


struct llc_addr {
	
unsigned char lsap;
	
unsigned char mac[IFHWADDRLEN];
};


#define LLC_SAP_STATE_INACTIVE	1

#define LLC_SAP_STATE_ACTIVE	2


#define LLC_SK_DEV_HASH_BITS 6

#define LLC_SK_DEV_HASH_ENTRIES (1<<LLC_SK_DEV_HASH_BITS)


#define LLC_SK_LADDR_HASH_BITS 6

#define LLC_SK_LADDR_HASH_ENTRIES (1<<LLC_SK_LADDR_HASH_BITS)

/**
 * struct llc_sap - Defines the SAP component
 *
 * @station - station this sap belongs to
 * @state - sap state
 * @p_bit - only lowest-order bit used
 * @f_bit - only lowest-order bit used
 * @laddr - SAP value in this 'lsap'
 * @node - entry in station sap_list
 * @sk_list - LLC sockets this one manages
 */

struct llc_sap {
	
unsigned char	 state;
	
unsigned char	 p_bit;
	
unsigned char	 f_bit;
	
atomic_t         refcnt;
	
int		 (*rcv_func)(struct sk_buff *skb,
				     struct net_device *dev,
				     struct packet_type *pt,
				     struct net_device *orig_dev);
	
struct llc_addr	 laddr;
	
struct list_head node;
	
spinlock_t sk_lock;
	
int sk_count;
	
struct hlist_nulls_head sk_laddr_hash[LLC_SK_LADDR_HASH_ENTRIES];
	
struct hlist_head sk_dev_hash[LLC_SK_DEV_HASH_ENTRIES];
};


static inline struct hlist_head *llc_sk_dev_hash(struct llc_sap *sap, int ifindex) { return &sap->sk_dev_hash[ifindex % LLC_SK_DEV_HASH_ENTRIES]; }

Contributors

PersonTokensPropCommitsCommitProp
Octavian Purdila28100.00%1100.00%
Total28100.00%1100.00%


static inline u32 llc_sk_laddr_hashfn(struct llc_sap *sap, const struct llc_addr *laddr) { return hash_32(jhash(laddr->mac, sizeof(laddr->mac), 0), LLC_SK_LADDR_HASH_BITS); }

Contributors

PersonTokensPropCommitsCommitProp
Octavian Purdila40100.00%1100.00%
Total40100.00%1100.00%


static inline struct hlist_nulls_head *llc_sk_laddr_hash(struct llc_sap *sap, const struct llc_addr *laddr) { return &sap->sk_laddr_hash[llc_sk_laddr_hashfn(sap, laddr)]; }

Contributors

PersonTokensPropCommitsCommitProp
Octavian Purdila34100.00%1100.00%
Total34100.00%1100.00%

#define LLC_DEST_INVALID 0 /* Invalid LLC PDU type */ #define LLC_DEST_SAP 1 /* Type 1 goes here */ #define LLC_DEST_CONN 2 /* Type 2 goes here */ extern struct list_head llc_sap_list; int llc_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); int llc_mac_hdr_init(struct sk_buff *skb, const unsigned char *sa, const unsigned char *da); void llc_add_pack(int type, void (*handler)(struct llc_sap *sap, struct sk_buff *skb)); void llc_remove_pack(int type); void llc_set_station_handler(void (*handler)(struct sk_buff *skb)); struct llc_sap *llc_sap_open(unsigned char lsap, int (*rcv)(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev));
static inline void llc_sap_hold(struct llc_sap *sap) { atomic_inc(&sap->refcnt); }

Contributors

PersonTokensPropCommitsCommitProp
Arnaldo Carvalho de Melo20100.00%2100.00%
Total20100.00%2100.00%

void llc_sap_close(struct llc_sap *sap);
static inline void llc_sap_put(struct llc_sap *sap) { if (atomic_dec_and_test(&sap->refcnt)) llc_sap_close(sap); }

Contributors

PersonTokensPropCommitsCommitProp
Arnaldo Carvalho de Melo27100.00%1100.00%
Total27100.00%1100.00%

struct llc_sap *llc_sap_find(unsigned char sap_value); int llc_build_and_send_ui_pkt(struct llc_sap *sap, struct sk_buff *skb, unsigned char *dmac, unsigned char dsap); void llc_sap_handler(struct llc_sap *sap, struct sk_buff *skb); void llc_conn_handler(struct llc_sap *sap, struct sk_buff *skb); void llc_station_init(void); void llc_station_exit(void); #ifdef CONFIG_PROC_FS int llc_proc_init(void); void llc_proc_exit(void); #else #define llc_proc_init() (0) #define llc_proc_exit() do { } while(0) #endif /* CONFIG_PROC_FS */ #ifdef CONFIG_SYSCTL int llc_sysctl_init(void); void llc_sysctl_exit(void); extern int sysctl_llc2_ack_timeout; extern int sysctl_llc2_busy_timeout; extern int sysctl_llc2_p_timeout; extern int sysctl_llc2_rej_timeout; #else #define llc_sysctl_init() (0) #define llc_sysctl_exit() do { } while(0) #endif /* CONFIG_SYSCTL */ #endif /* LLC_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Arnaldo Carvalho de Melo42068.29%1361.90%
Octavian Purdila14623.74%314.29%
David S. Miller457.32%29.52%
Stephen Hemminger20.33%14.76%
Ben Hutchings10.16%14.76%
Arun Sharma10.16%14.76%
Total615100.00%21100.00%
Directory: include/net
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.