cregit-Linux how code gets into the kernel

Release 4.7 include/uapi/linux/atmmpc.h

#ifndef _ATMMPC_H_

#define _ATMMPC_H_

#include <linux/atmapi.h>
#include <linux/atmioc.h>
#include <linux/atm.h>
#include <linux/types.h>


#define ATMMPC_CTRL _IO('a', ATMIOC_MPOA)

#define ATMMPC_DATA _IO('a', ATMIOC_MPOA+1)


#define MPC_SOCKET_INGRESS 1

#define MPC_SOCKET_EGRESS  2


struct atmmpc_ioc {
        
int dev_num;
        
__be32 ipaddr;              /* the IP address of the shortcut    */
        
int type;                     /* ingress or egress                 */
};


typedef struct in_ctrl_info {
        
__u8   Last_NHRP_CIE_code;
        
__u8   Last_Q2931_cause_value;
        
__u8   eg_MPC_ATM_addr[ATM_ESA_LEN];
        
__be32  tag;
        
__be32  in_dst_ip;      /* IP address this ingress MPC sends packets to */
        
__u16  holding_time;
        
__u32  request_id;
} 
in_ctrl_info;


typedef struct eg_ctrl_info {
        
__u8   DLL_header[256];
        
__u8   DH_length;
        
__be32  cache_id;
        
__be32  tag;
        
__be32  mps_ip;
        
__be32  eg_dst_ip;      /* IP address to which ingress MPC sends packets */
        
__u8   in_MPC_data_ATM_addr[ATM_ESA_LEN];
        
__u16  holding_time;
} 
eg_ctrl_info;


struct mpc_parameters {
        
__u16 mpc_p1;   /* Shortcut-Setup Frame Count    */
        
__u16 mpc_p2;   /* Shortcut-Setup Frame Time     */
        
__u8 mpc_p3[8]; /* Flow-detection Protocols      */
        
__u16 mpc_p4;   /* MPC Initial Retry Time        */
        
__u16 mpc_p5;   /* MPC Retry Time Maximum        */
        
__u16 mpc_p6;   /* Hold Down Time                */
} ;


struct k_message {
        
__u16 type;
        
__be32 ip_mask;
        
__u8  MPS_ctrl[ATM_ESA_LEN];
        union {
                
in_ctrl_info in_info;
                
eg_ctrl_info eg_info;
                
struct mpc_parameters params;
        } 
content;
        
struct atm_qos qos;       
} 
__ATM_API_ALIGN;


struct llc_snap_hdr {
	/* RFC 1483 LLC/SNAP encapsulation for routed IP PDUs */
        
__u8  dsap;    /* Destination Service Access Point (0xAA)     */
        
__u8  ssap;    /* Source Service Access Point      (0xAA)     */
        
__u8  ui;      /* Unnumbered Information           (0x03)     */
        
__u8  org[3];  /* Organizational identification    (0x000000) */
        
__u8  type[2]; /* Ether type (for IP)              (0x0800)   */
};

/* TLVs this MPC recognizes */

#define TLV_MPOA_DEVICE_TYPE         0x00a03e2a  

/* MPOA device types in MPOA Device Type TLV */

#define NON_MPOA    0

#define MPS         1

#define MPC         2

#define MPS_AND_MPC 3


/* MPC parameter defaults */


#define MPC_P1 10  
/* Shortcut-Setup Frame Count  */ 

#define MPC_P2 1   
/* Shortcut-Setup Frame Time   */

#define MPC_P3 0   
/* Flow-detection Protocols    */

#define MPC_P4 5   
/* MPC Initial Retry Time      */

#define MPC_P5 40  
/* MPC Retry Time Maximum      */

#define MPC_P6 160 
/* Hold Down Time              */

#define HOLDING_TIME_DEFAULT 1200 
/* same as MPS-p7 */

/* MPC constants */


#define MPC_C1 2   
/* Retry Time Multiplier       */

#define MPC_C2 60  
/* Initial Keep-Alive Lifetime */

/* Message types - to MPOA daemon */


#define SND_MPOA_RES_RQST    201

#define SET_MPS_CTRL_ADDR    202

#define SND_MPOA_RES_RTRY    203 
/* Different type in a retry due to req id         */

#define STOP_KEEP_ALIVE_SM   204

#define EGRESS_ENTRY_REMOVED 205

#define SND_EGRESS_PURGE     206

#define DIE                  207 
/* tell the daemon to exit()                       */

#define DATA_PLANE_PURGE     208 
/* Data plane purge because of egress cache hit miss or dead MPS */

#define OPEN_INGRESS_SVC     209

/* Message types - from MPOA daemon */


#define MPOA_TRIGGER_RCVD     101

#define MPOA_RES_REPLY_RCVD   102

#define INGRESS_PURGE_RCVD    103

#define EGRESS_PURGE_RCVD     104

#define MPS_DEATH             105

#define CACHE_IMPOS_RCVD      106

#define SET_MPC_CTRL_ADDR     107 
/* Our MPC's control ATM address   */

#define SET_MPS_MAC_ADDR      108

#define CLEAN_UP_AND_EXIT     109

#define SET_MPC_PARAMS        110 
/* MPC configuration parameters    */

/* Message types - bidirectional */       


#define RELOAD                301 
/* kill -HUP the daemon for reload */

#endif /* _ATMMPC_H_ */

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