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linux-next/include/linux/atalk.h
Arjan van de Ven 540473208f [PATCH] mark struct file_operations const 1 
Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12 09:48:44 -08:00

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#ifndef __LINUX_ATALK_H__
#define __LINUX_ATALK_H__
#include <asm/byteorder.h>
/*
* AppleTalk networking structures
*
* The following are directly referenced from the University Of Michigan
* netatalk for compatibility reasons.
*/
#define ATPORT_FIRST 1
#define ATPORT_RESERVED 128
#define ATPORT_LAST 254 /* 254 is only legal on localtalk */
#define ATADDR_ANYNET (__u16)0
#define ATADDR_ANYNODE (__u8)0
#define ATADDR_ANYPORT (__u8)0
#define ATADDR_BCAST (__u8)255
#define DDP_MAXSZ 587
#define DDP_MAXHOPS 15 /* 4 bits of hop counter */
#define SIOCATALKDIFADDR (SIOCPROTOPRIVATE + 0)
struct atalk_addr {
__be16 s_net;
__u8 s_node;
};
struct sockaddr_at {
sa_family_t sat_family;
__u8 sat_port;
struct atalk_addr sat_addr;
char sat_zero[8];
};
struct atalk_netrange {
__u8 nr_phase;
__be16 nr_firstnet;
__be16 nr_lastnet;
};
#ifdef __KERNEL__
#include <net/sock.h>
struct atalk_route {
struct net_device *dev;
struct atalk_addr target;
struct atalk_addr gateway;
int flags;
struct atalk_route *next;
};
/**
* struct atalk_iface - AppleTalk Interface
* @dev - Network device associated with this interface
* @address - Our address
* @status - What are we doing?
* @nets - Associated direct netrange
* @next - next element in the list of interfaces
*/
struct atalk_iface {
struct net_device *dev;
struct atalk_addr address;
int status;
#define ATIF_PROBE 1 /* Probing for an address */
#define ATIF_PROBE_FAIL 2 /* Probe collided */
struct atalk_netrange nets;
struct atalk_iface *next;
};
struct atalk_sock {
/* struct sock has to be the first member of atalk_sock */
struct sock sk;
__be16 dest_net;
__be16 src_net;
unsigned char dest_node;
unsigned char src_node;
unsigned char dest_port;
unsigned char src_port;
};
static inline struct atalk_sock *at_sk(struct sock *sk)
{
return (struct atalk_sock *)sk;
}
#include <asm/byteorder.h>
struct ddpehdr {
__be16 deh_len_hops; /* lower 10 bits are length, next 4 - hops */
__be16 deh_sum;
__be16 deh_dnet;
__be16 deh_snet;
__u8 deh_dnode;
__u8 deh_snode;
__u8 deh_dport;
__u8 deh_sport;
/* And netatalk apps expect to stick the type in themselves */
};
static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb)
{
return (struct ddpehdr *)skb->h.raw;
}
/* AppleTalk AARP headers */
struct elapaarp {
__be16 hw_type;
#define AARP_HW_TYPE_ETHERNET 1
#define AARP_HW_TYPE_TOKENRING 2
__be16 pa_type;
__u8 hw_len;
__u8 pa_len;
#define AARP_PA_ALEN 4
__be16 function;
#define AARP_REQUEST 1
#define AARP_REPLY 2
#define AARP_PROBE 3
__u8 hw_src[ETH_ALEN];
__u8 pa_src_zero;
__be16 pa_src_net;
__u8 pa_src_node;
__u8 hw_dst[ETH_ALEN];
__u8 pa_dst_zero;
__be16 pa_dst_net;
__u8 pa_dst_node;
} __attribute__ ((packed));
static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb)
{
return (struct elapaarp *)skb->h.raw;
}
/* Not specified - how long till we drop a resolved entry */
#define AARP_EXPIRY_TIME (5 * 60 * HZ)
/* Size of hash table */
#define AARP_HASH_SIZE 16
/* Fast retransmission timer when resolving */
#define AARP_TICK_TIME (HZ / 5)
/* Send 10 requests then give up (2 seconds) */
#define AARP_RETRANSMIT_LIMIT 10
/*
* Some value bigger than total retransmit time + a bit for last reply to
* appear and to stop continual requests
*/
#define AARP_RESOLVE_TIME (10 * HZ)
extern struct datalink_proto *ddp_dl, *aarp_dl;
extern void aarp_proto_init(void);
/* Inter module exports */
/* Give a device find its atif control structure */
static inline struct atalk_iface *atalk_find_dev(struct net_device *dev)
{
return dev->atalk_ptr;
}
extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev);
extern struct net_device *atrtr_get_dev(struct atalk_addr *sa);
extern int aarp_send_ddp(struct net_device *dev,
struct sk_buff *skb,
struct atalk_addr *sa, void *hwaddr);
extern void aarp_device_down(struct net_device *dev);
extern void aarp_probe_network(struct atalk_iface *atif);
extern int aarp_proxy_probe_network(struct atalk_iface *atif,
struct atalk_addr *sa);
extern void aarp_proxy_remove(struct net_device *dev,
struct atalk_addr *sa);
extern void aarp_cleanup_module(void);
extern struct hlist_head atalk_sockets;
extern rwlock_t atalk_sockets_lock;
extern struct atalk_route *atalk_routes;
extern rwlock_t atalk_routes_lock;
extern struct atalk_iface *atalk_interfaces;
extern rwlock_t atalk_interfaces_lock;
extern struct atalk_route atrtr_default;
extern const struct file_operations atalk_seq_arp_fops;
extern int sysctl_aarp_expiry_time;
extern int sysctl_aarp_tick_time;
extern int sysctl_aarp_retransmit_limit;
extern int sysctl_aarp_resolve_time;
#ifdef CONFIG_SYSCTL
extern void atalk_register_sysctl(void);
extern void atalk_unregister_sysctl(void);
#else
#define atalk_register_sysctl() do { } while(0)
#define atalk_unregister_sysctl() do { } while(0)
#endif
#ifdef CONFIG_PROC_FS
extern int atalk_proc_init(void);
extern void atalk_proc_exit(void);
#else
#define atalk_proc_init() ({ 0; })
#define atalk_proc_exit() do { } while(0)
#endif /* CONFIG_PROC_FS */
#endif /* __KERNEL__ */
#endif /* __LINUX_ATALK_H__ */
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