net/atm/mpoa_caches.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef MPOA_CACHES_H
0003 #define MPOA_CACHES_H
0004
0005 #include <linux/time64.h>
0006 #include <linux/netdevice.h>
0007 #include <linux/types.h>
0008 #include <linux/atm.h>
0009 #include <linux/atmdev.h>
0010 #include <linux/atmmpc.h>
0011 #include <linux/refcount.h>
0012
0013 struct mpoa_client;
0014
0015 void atm_mpoa_init_cache(struct mpoa_client *mpc);
0016
0017 typedef struct in_cache_entry {
0018     struct in_cache_entry *next;
0019     struct in_cache_entry *prev;
0020     time64_t  time;
0021     time64_t  reply_wait;
0022     time64_t  hold_down;
0023     uint32_t  packets_fwded;
0024     uint16_t  entry_state;
0025     uint32_t retry_time;
0026     uint32_t refresh_time;
0027     uint32_t count;
0028     struct   atm_vcc *shortcut;
0029     uint8_t  MPS_ctrl_ATM_addr[ATM_ESA_LEN];
0030     struct   in_ctrl_info ctrl_info;
0031     refcount_t use;
0032 } in_cache_entry;
0033
0034 struct in_cache_ops{
0035     in_cache_entry *(*add_entry)(__be32 dst_ip,
0036                       struct mpoa_client *client);
0037     in_cache_entry *(*get)(__be32 dst_ip, struct mpoa_client *client);
0038     in_cache_entry *(*get_with_mask)(__be32 dst_ip,
0039                      struct mpoa_client *client,
0040                      __be32 mask);
0041     in_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc,
0042                       struct mpoa_client *client);
0043     void            (*put)(in_cache_entry *entry);
0044     void            (*remove_entry)(in_cache_entry *delEntry,
0045                     struct mpoa_client *client );
0046     int             (*cache_hit)(in_cache_entry *entry,
0047                      struct mpoa_client *client);
0048     void            (*clear_count)(struct mpoa_client *client);
0049     void            (*check_resolving)(struct mpoa_client *client);
0050     void            (*refresh)(struct mpoa_client *client);
0051     void            (*destroy_cache)(struct mpoa_client *mpc);
0052 };
0053
0054 typedef struct eg_cache_entry{
0055     struct               eg_cache_entry *next;
0056     struct               eg_cache_entry *prev;
0057     time64_t         time;
0058     uint8_t              MPS_ctrl_ATM_addr[ATM_ESA_LEN];
0059     struct atm_vcc       *shortcut;
0060     uint32_t             packets_rcvd;
0061     uint16_t             entry_state;
0062     __be32             latest_ip_addr;    /* The src IP address of the last packet */
0063     struct eg_ctrl_info  ctrl_info;
0064     refcount_t             use;
0065 } eg_cache_entry;
0066
0067 struct eg_cache_ops{
0068     eg_cache_entry *(*add_entry)(struct k_message *msg, struct mpoa_client *client);
0069     eg_cache_entry *(*get_by_cache_id)(__be32 cache_id, struct mpoa_client *client);
0070     eg_cache_entry *(*get_by_tag)(__be32 cache_id, struct mpoa_client *client);
0071     eg_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc, struct mpoa_client *client);
0072     eg_cache_entry *(*get_by_src_ip)(__be32 ipaddr, struct mpoa_client *client);
0073     void            (*put)(eg_cache_entry *entry);
0074     void            (*remove_entry)(eg_cache_entry *entry, struct mpoa_client *client);
0075     void            (*update)(eg_cache_entry *entry, uint16_t holding_time);
0076     void            (*clear_expired)(struct mpoa_client *client);
0077     void            (*destroy_cache)(struct mpoa_client *mpc);
0078 };
0079
0080
0081 /* Ingress cache entry states */
0082
0083 #define INGRESS_REFRESHING 3
0084 #define INGRESS_RESOLVED   2
0085 #define INGRESS_RESOLVING  1
0086 #define INGRESS_INVALID    0
0087
0088 /* VCC states */
0089
0090 #define OPEN   1
0091 #define CLOSED 0
0092
0093 /* Egress cache entry states */
0094
0095 #define EGRESS_RESOLVED 2
0096 #define EGRESS_PURGE    1
0097 #define EGRESS_INVALID  0
0098
0099 #endif