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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160/* SPDX-License-Identifier: GPL-2.0 */#ifndef LLC_H#define LLC_H/* * Copyright (c) 1997 by Procom Technology, Inc. * 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br> */
#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; refcount_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]; struct rcu_head rcu;};
static inlinestruct hlist_head *llc_sk_dev_hash(struct llc_sap *sap, int ifindex){ u32 bucket = hash_32(ifindex, LLC_SK_DEV_HASH_BITS);
return &sap->sk_dev_hash[bucket];}
static inlineu32 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);}
static inlinestruct 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)];}
#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){ refcount_inc(&sap->refcnt);}
static inline bool llc_sap_hold_safe(struct llc_sap *sap){ return refcount_inc_not_zero(&sap->refcnt);}
void llc_sap_close(struct llc_sap *sap);
static inline void llc_sap_put(struct llc_sap *sap){ if (refcount_dec_and_test(&sap->refcnt)) llc_sap_close(sap);}
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, const 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_FSint 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_SYSCTLint 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 */