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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/net/atm/mpoa_caches.h
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/* SPDX-License-Identifier: GPL-2.0 */

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#ifndef MPOA_CACHES_H

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#define MPOA_CACHES_H

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#include <linux/time64.h>

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#include <linux/netdevice.h>

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#include <linux/types.h>

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#include <linux/atm.h>

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#include <linux/atmdev.h>

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#include <linux/atmmpc.h>

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#include <linux/refcount.h>

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struct mpoa_client;

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void atm_mpoa_init_cache(struct mpoa_client *mpc);

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typedef struct in_cache_entry {

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	struct in_cache_entry *next;

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	struct in_cache_entry *prev;

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	time64_t  time;

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	time64_t  reply_wait;

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	time64_t  hold_down;

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	uint32_t  packets_fwded;

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	uint16_t  entry_state;

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	uint32_t retry_time;

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	uint32_t refresh_time;

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	uint32_t count;

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	struct   atm_vcc *shortcut;

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	uint8_t  MPS_ctrl_ATM_addr[ATM_ESA_LEN];

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	struct   in_ctrl_info ctrl_info;

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	refcount_t use;

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} in_cache_entry;

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struct in_cache_ops{

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	in_cache_entry *(*add_entry)(__be32 dst_ip,

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				      struct mpoa_client *client);

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	in_cache_entry *(*get)(__be32 dst_ip, struct mpoa_client *client);

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	in_cache_entry *(*get_with_mask)(__be32 dst_ip,

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					 struct mpoa_client *client,

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					 __be32 mask);

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	in_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc,

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				      struct mpoa_client *client);

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	void            (*put)(in_cache_entry *entry);

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	void            (*remove_entry)(in_cache_entry *delEntry,

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					struct mpoa_client *client );

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	int             (*cache_hit)(in_cache_entry *entry,

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				     struct mpoa_client *client);

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	void            (*clear_count)(struct mpoa_client *client);

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	void            (*check_resolving)(struct mpoa_client *client);

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	void            (*refresh)(struct mpoa_client *client);

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	void            (*destroy_cache)(struct mpoa_client *mpc);

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};

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typedef struct eg_cache_entry{

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	struct               eg_cache_entry *next;

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	struct               eg_cache_entry *prev;

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	time64_t	     time;

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	uint8_t              MPS_ctrl_ATM_addr[ATM_ESA_LEN];

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	struct atm_vcc       *shortcut;

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	uint32_t             packets_rcvd;

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	uint16_t             entry_state;

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	__be32             latest_ip_addr;    /* The src IP address of the last packet */

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	struct eg_ctrl_info  ctrl_info;

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	refcount_t             use;

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} eg_cache_entry;

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struct eg_cache_ops{

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	eg_cache_entry *(*add_entry)(struct k_message *msg, struct mpoa_client *client);

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	eg_cache_entry *(*get_by_cache_id)(__be32 cache_id, struct mpoa_client *client);

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	eg_cache_entry *(*get_by_tag)(__be32 cache_id, struct mpoa_client *client);

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	eg_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc, struct mpoa_client *client);

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	eg_cache_entry *(*get_by_src_ip)(__be32 ipaddr, struct mpoa_client *client);

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	void            (*put)(eg_cache_entry *entry);

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	void            (*remove_entry)(eg_cache_entry *entry, struct mpoa_client *client);

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	void            (*update)(eg_cache_entry *entry, uint16_t holding_time);

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	void            (*clear_expired)(struct mpoa_client *client);

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	void            (*destroy_cache)(struct mpoa_client *mpc);

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};

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/* Ingress cache entry states */

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#define INGRESS_REFRESHING 3

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#define INGRESS_RESOLVED   2

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#define INGRESS_RESOLVING  1

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#define INGRESS_INVALID    0

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/* VCC states */

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#define OPEN   1

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#define CLOSED 0

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/* Egress cache entry states */

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#define EGRESS_RESOLVED 2

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#define EGRESS_PURGE    1

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#define EGRESS_INVALID  0

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#endif

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