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linux/include/net/netrom.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

272 lines
7.9 KiB
C
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/*
* Declarations of NET/ROM type objects.
*
* Jonathan Naylor G4KLX 9/4/95
*/
#ifndef _NETROM_H
#define _NETROM_H
#include <linux/netrom.h>
#include <linux/list.h>
#include <net/sock.h>
#define NR_NETWORK_LEN 15
#define NR_TRANSPORT_LEN 5
#define NR_PROTO_IP 0x0C
#define NR_PROTOEXT 0x00
#define NR_CONNREQ 0x01
#define NR_CONNACK 0x02
#define NR_DISCREQ 0x03
#define NR_DISCACK 0x04
#define NR_INFO 0x05
#define NR_INFOACK 0x06
#define NR_RESET 0x07
#define NR_CHOKE_FLAG 0x80
#define NR_NAK_FLAG 0x40
#define NR_MORE_FLAG 0x20
/* Define Link State constants. */
enum {
NR_STATE_0,
NR_STATE_1,
NR_STATE_2,
NR_STATE_3
};
#define NR_COND_ACK_PENDING 0x01
#define NR_COND_REJECT 0x02
#define NR_COND_PEER_RX_BUSY 0x04
#define NR_COND_OWN_RX_BUSY 0x08
#define NR_DEFAULT_T1 120000 /* Outstanding frames - 120 seconds */
#define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */
#define NR_DEFAULT_N2 3 /* Number of Retries - 3 */
#define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */
#define NR_DEFAULT_IDLE 0 /* No Activity Timeout - none */
#define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */
#define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */
#define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */
#define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */
#define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */
#define NR_DEFAULT_FAILS 2 /* Link fails until route fails */
#define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */
#define NR_MODULUS 256
#define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */
#define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */
struct nr_private {
struct net_device_stats stats;
};
struct nr_sock {
struct sock sock;
ax25_address user_addr, source_addr, dest_addr;
struct net_device *device;
unsigned char my_index, my_id;
unsigned char your_index, your_id;
unsigned char state, condition, bpqext, window;
unsigned short vs, vr, va, vl;
unsigned char n2, n2count;
unsigned long t1, t2, t4, idle;
unsigned short fraglen;
struct timer_list t1timer;
struct timer_list t2timer;
struct timer_list t4timer;
struct timer_list idletimer;
struct sk_buff_head ack_queue;
struct sk_buff_head reseq_queue;
struct sk_buff_head frag_queue;
};
#define nr_sk(sk) ((struct nr_sock *)(sk))
struct nr_neigh {
struct hlist_node neigh_node;
ax25_address callsign;
ax25_digi *digipeat;
ax25_cb *ax25;
struct net_device *dev;
unsigned char quality;
unsigned char locked;
unsigned short count;
unsigned int number;
unsigned char failed;
atomic_t refcount;
};
struct nr_route {
unsigned char quality;
unsigned char obs_count;
struct nr_neigh *neighbour;
};
struct nr_node {
struct hlist_node node_node;
ax25_address callsign;
char mnemonic[7];
unsigned char which;
unsigned char count;
struct nr_route routes[3];
atomic_t refcount;
spinlock_t node_lock;
};
/*********************************************************************
* nr_node & nr_neigh lists, refcounting and locking
*********************************************************************/
#define nr_node_hold(__nr_node) \
atomic_inc(&((__nr_node)->refcount))
static __inline__ void nr_node_put(struct nr_node *nr_node)
{
if (atomic_dec_and_test(&nr_node->refcount)) {
kfree(nr_node);
}
}
#define nr_neigh_hold(__nr_neigh) \
atomic_inc(&((__nr_neigh)->refcount))
static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh)
{
if (atomic_dec_and_test(&nr_neigh->refcount)) {
kfree(nr_neigh->digipeat);
kfree(nr_neigh);
}
}
/* nr_node_lock and nr_node_unlock also hold/put the node's refcounter.
*/
static __inline__ void nr_node_lock(struct nr_node *nr_node)
{
nr_node_hold(nr_node);
spin_lock_bh(&nr_node->node_lock);
}
static __inline__ void nr_node_unlock(struct nr_node *nr_node)
{
spin_unlock_bh(&nr_node->node_lock);
nr_node_put(nr_node);
}
#define nr_neigh_for_each(__nr_neigh, node, list) \
hlist_for_each_entry(__nr_neigh, node, list, neigh_node)
#define nr_neigh_for_each_safe(__nr_neigh, node, node2, list) \
hlist_for_each_entry_safe(__nr_neigh, node, node2, list, neigh_node)
#define nr_node_for_each(__nr_node, node, list) \
hlist_for_each_entry(__nr_node, node, list, node_node)
#define nr_node_for_each_safe(__nr_node, node, node2, list) \
hlist_for_each_entry_safe(__nr_node, node, node2, list, node_node)
/*********************************************************************/
/* af_netrom.c */
extern int sysctl_netrom_default_path_quality;
extern int sysctl_netrom_obsolescence_count_initialiser;
extern int sysctl_netrom_network_ttl_initialiser;
extern int sysctl_netrom_transport_timeout;
extern int sysctl_netrom_transport_maximum_tries;
extern int sysctl_netrom_transport_acknowledge_delay;
extern int sysctl_netrom_transport_busy_delay;
extern int sysctl_netrom_transport_requested_window_size;
extern int sysctl_netrom_transport_no_activity_timeout;
extern int sysctl_netrom_routing_control;
extern int sysctl_netrom_link_fails_count;
extern int sysctl_netrom_reset_circuit;
extern int nr_rx_frame(struct sk_buff *, struct net_device *);
extern void nr_destroy_socket(struct sock *);
/* nr_dev.c */
extern int nr_rx_ip(struct sk_buff *, struct net_device *);
extern void nr_setup(struct net_device *);
/* nr_in.c */
extern int nr_process_rx_frame(struct sock *, struct sk_buff *);
/* nr_loopback.c */
extern void nr_loopback_init(void);
extern void nr_loopback_clear(void);
extern int nr_loopback_queue(struct sk_buff *);
/* nr_out.c */
extern void nr_output(struct sock *, struct sk_buff *);
extern void nr_send_nak_frame(struct sock *);
extern void nr_kick(struct sock *);
extern void nr_transmit_buffer(struct sock *, struct sk_buff *);
extern void nr_establish_data_link(struct sock *);
extern void nr_enquiry_response(struct sock *);
extern void nr_check_iframes_acked(struct sock *, unsigned short);
/* nr_route.c */
extern void nr_rt_device_down(struct net_device *);
extern struct net_device *nr_dev_first(void);
extern struct net_device *nr_dev_get(ax25_address *);
extern int nr_rt_ioctl(unsigned int, void __user *);
extern void nr_link_failed(ax25_cb *, int);
extern int nr_route_frame(struct sk_buff *, ax25_cb *);
extern const struct file_operations nr_nodes_fops;
extern const struct file_operations nr_neigh_fops;
extern void nr_rt_free(void);
/* nr_subr.c */
extern void nr_clear_queues(struct sock *);
extern void nr_frames_acked(struct sock *, unsigned short);
extern void nr_requeue_frames(struct sock *);
extern int nr_validate_nr(struct sock *, unsigned short);
extern int nr_in_rx_window(struct sock *, unsigned short);
extern void nr_write_internal(struct sock *, int);
extern void __nr_transmit_reply(struct sk_buff *skb, int mine,
unsigned char cmdflags);
/*
* This routine is called when a Connect Acknowledge with the Choke Flag
* set is needed to refuse a connection.
*/
#define nr_transmit_refusal(skb, mine) \
do { \
__nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \
} while (0)
/*
* This routine is called when we don't have a circuit matching an incoming
* NET/ROM packet. This is an G8PZT Xrouter extension.
*/
#define nr_transmit_reset(skb, mine) \
do { \
__nr_transmit_reply((skb), (mine), NR_RESET); \
} while (0)
extern void nr_disconnect(struct sock *, int);
/* nr_timer.c */
extern void nr_init_timers(struct sock *sk);
extern void nr_start_heartbeat(struct sock *);
extern void nr_start_t1timer(struct sock *);
extern void nr_start_t2timer(struct sock *);
extern void nr_start_t4timer(struct sock *);
extern void nr_start_idletimer(struct sock *);
extern void nr_stop_heartbeat(struct sock *);
extern void nr_stop_t1timer(struct sock *);
extern void nr_stop_t2timer(struct sock *);
extern void nr_stop_t4timer(struct sock *);
extern void nr_stop_idletimer(struct sock *);
extern int nr_t1timer_running(struct sock *);
/* sysctl_net_netrom.c */
extern void nr_register_sysctl(void);
extern void nr_unregister_sysctl(void);
#endif
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