root/net/atm/mpoa_caches.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef MPOA_CACHES_H
   3 #define MPOA_CACHES_H
   4 
   5 #include <linux/time64.h>
   6 #include <linux/netdevice.h>
   7 #include <linux/types.h>
   8 #include <linux/atm.h>
   9 #include <linux/atmdev.h>
  10 #include <linux/atmmpc.h>
  11 #include <linux/refcount.h>
  12 
  13 struct mpoa_client;
  14 
  15 void atm_mpoa_init_cache(struct mpoa_client *mpc);
  16 
  17 typedef struct in_cache_entry {
  18         struct in_cache_entry *next;
  19         struct in_cache_entry *prev;
  20         time64_t  time;
  21         time64_t  reply_wait;
  22         time64_t  hold_down;
  23         uint32_t  packets_fwded;
  24         uint16_t  entry_state;
  25         uint32_t retry_time;
  26         uint32_t refresh_time;
  27         uint32_t count;
  28         struct   atm_vcc *shortcut;
  29         uint8_t  MPS_ctrl_ATM_addr[ATM_ESA_LEN];
  30         struct   in_ctrl_info ctrl_info;
  31         refcount_t use;
  32 } in_cache_entry;
  33 
  34 struct in_cache_ops{
  35         in_cache_entry *(*add_entry)(__be32 dst_ip,
  36                                       struct mpoa_client *client);
  37         in_cache_entry *(*get)(__be32 dst_ip, struct mpoa_client *client);
  38         in_cache_entry *(*get_with_mask)(__be32 dst_ip,
  39                                          struct mpoa_client *client,
  40                                          __be32 mask);
  41         in_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc,
  42                                       struct mpoa_client *client);
  43         void            (*put)(in_cache_entry *entry);
  44         void            (*remove_entry)(in_cache_entry *delEntry,
  45                                         struct mpoa_client *client );
  46         int             (*cache_hit)(in_cache_entry *entry,
  47                                      struct mpoa_client *client);
  48         void            (*clear_count)(struct mpoa_client *client);
  49         void            (*check_resolving)(struct mpoa_client *client);
  50         void            (*refresh)(struct mpoa_client *client);
  51         void            (*destroy_cache)(struct mpoa_client *mpc);
  52 };
  53 
  54 typedef struct eg_cache_entry{
  55         struct               eg_cache_entry *next;
  56         struct               eg_cache_entry *prev;
  57         time64_t             time;
  58         uint8_t              MPS_ctrl_ATM_addr[ATM_ESA_LEN];
  59         struct atm_vcc       *shortcut;
  60         uint32_t             packets_rcvd;
  61         uint16_t             entry_state;
  62         __be32             latest_ip_addr;    /* The src IP address of the last packet */
  63         struct eg_ctrl_info  ctrl_info;
  64         refcount_t             use;
  65 } eg_cache_entry;
  66 
  67 struct eg_cache_ops{
  68         eg_cache_entry *(*add_entry)(struct k_message *msg, struct mpoa_client *client);
  69         eg_cache_entry *(*get_by_cache_id)(__be32 cache_id, struct mpoa_client *client);
  70         eg_cache_entry *(*get_by_tag)(__be32 cache_id, struct mpoa_client *client);
  71         eg_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc, struct mpoa_client *client);
  72         eg_cache_entry *(*get_by_src_ip)(__be32 ipaddr, struct mpoa_client *client);
  73         void            (*put)(eg_cache_entry *entry);
  74         void            (*remove_entry)(eg_cache_entry *entry, struct mpoa_client *client);
  75         void            (*update)(eg_cache_entry *entry, uint16_t holding_time);
  76         void            (*clear_expired)(struct mpoa_client *client);
  77         void            (*destroy_cache)(struct mpoa_client *mpc);
  78 };
  79 
  80 
  81 /* Ingress cache entry states */
  82 
  83 #define INGRESS_REFRESHING 3
  84 #define INGRESS_RESOLVED   2
  85 #define INGRESS_RESOLVING  1
  86 #define INGRESS_INVALID    0
  87 
  88 /* VCC states */
  89 
  90 #define OPEN   1
  91 #define CLOSED 0
  92 
  93 /* Egress cache entry states */
  94 
  95 #define EGRESS_RESOLVED 2
  96 #define EGRESS_PURGE    1
  97 #define EGRESS_INVALID  0
  98 
  99 #endif