cregit-Linux how code gets into the kernel

Release 4.10 fs/isofs/rock.h

Directory: fs/isofs
/*
 * These structs are used by the system-use-sharing protocol, in which the
 * Rock Ridge extensions are embedded.  It is quite possible that other
 * extensions are present on the disk, and this is fine as long as they
 * all use SUSP
 */


struct SU_SP_s {
	
unsigned char magic[2];
	
unsigned char skip;
} __attribute__ ((packed));


struct SU_CE_s {
	
char extent[8];
	
char offset[8];
	
char size[8];
};


struct SU_ER_s {
	
unsigned char len_id;
	
unsigned char len_des;
	
unsigned char len_src;
	
unsigned char ext_ver;
	
char data[0];
} __attribute__ ((packed));


struct RR_RR_s {
	
char flags[1];
} __attribute__ ((packed));


struct RR_PX_s {
	
char mode[8];
	
char n_links[8];
	
char uid[8];
	
char gid[8];
};


struct RR_PN_s {
	
char dev_high[8];
	
char dev_low[8];
};


struct SL_component {
	
unsigned char flags;
	
unsigned char len;
	
char text[0];
} __attribute__ ((packed));


struct RR_SL_s {
	
unsigned char flags;
	
struct SL_component link;
} __attribute__ ((packed));


struct RR_NM_s {
	
unsigned char flags;
	
char name[0];
} __attribute__ ((packed));


struct RR_CL_s {
	
char location[8];
};


struct RR_PL_s {
	
char location[8];
};


struct stamp {
	
char time[7];
} __attribute__ ((packed));


struct RR_TF_s {
	
char flags;
	
struct stamp times[0];	/* Variable number of these beasts */
} __attribute__ ((packed));

/* Linux-specific extension for transparent decompression */

struct RR_ZF_s {
	
char algorithm[2];
	
char parms[2];
	
char real_size[8];
};

/*
 * These are the bits and their meanings for flags in the TF structure.
 */

#define TF_CREATE 1

#define TF_MODIFY 2

#define TF_ACCESS 4

#define TF_ATTRIBUTES 8

#define TF_BACKUP 16

#define TF_EXPIRATION 32

#define TF_EFFECTIVE 64

#define TF_LONG_FORM 128


struct rock_ridge {
	
char signature[2];
	
unsigned char len;
	
unsigned char version;
	union {
		
struct SU_SP_s SP;
		
struct SU_CE_s CE;
		
struct SU_ER_s ER;
		
struct RR_RR_s RR;
		
struct RR_PX_s PX;
		
struct RR_PN_s PN;
		
struct RR_SL_s SL;
		
struct RR_NM_s NM;
		
struct RR_CL_s CL;
		
struct RR_PL_s PL;
		
struct RR_TF_s TF;
		
struct RR_ZF_s ZF;
	} 
u;
};


#define RR_PX 1			
/* POSIX attributes */

#define RR_PN 2			
/* POSIX devices */

#define RR_SL 4			
/* Symbolic link */

#define RR_NM 8			
/* Alternate Name */

#define RR_CL 16		
/* Child link */

#define RR_PL 32		
/* Parent link */

#define RR_RE 64		
/* Relocation directory */

#define RR_TF 128		
/* Timestamps */

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Directory: fs/isofs
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