The C and C++ Include Header Files

/usr/include/linux/romfs_fs.h


$ cat -n /usr/include/linux/romfs_fs.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef __LINUX_ROMFS_FS_H
     3	#define __LINUX_ROMFS_FS_H
     4	
     5	#include <linux/types.h>
     6	#include <linux/fs.h>
     7	
     8	/* The basic structures of the romfs filesystem */
     9	
    10	#define ROMBSIZE BLOCK_SIZE
    11	#define ROMBSBITS BLOCK_SIZE_BITS
    12	#define ROMBMASK (ROMBSIZE-1)
    13	#define ROMFS_MAGIC 0x7275
    14	
    15	#define ROMFS_MAXFN 128
    16	
    17	#define __mkw(h,l) (((h)&0x00ff)<< 8|((l)&0x00ff))
    18	#define __mkl(h,l) (((h)&0xffff)<<16|((l)&0xffff))
    19	#define __mk4(a,b,c,d) cpu_to_be32(__mkl(__mkw(a,b),__mkw(c,d)))
    20	#define ROMSB_WORD0 __mk4('-','r','o','m')
    21	#define ROMSB_WORD1 __mk4('1','f','s','-')
    22	
    23	/* On-disk "super block" */
    24	
    25	struct romfs_super_block {
    26		__be32 word0;
    27		__be32 word1;
    28		__be32 size;
    29		__be32 checksum;
    30		char name[];		/* volume name */
    31	};
    32	
    33	/* On disk inode */
    34	
    35	struct romfs_inode {
    36		__be32 next;		/* low 4 bits see ROMFH_ */
    37		__be32 spec;
    38		__be32 size;
    39		__be32 checksum;
    40		char name[];
    41	};
    42	
    43	#define ROMFH_TYPE 7
    44	#define ROMFH_HRD 0
    45	#define ROMFH_DIR 1
    46	#define ROMFH_REG 2
    47	#define ROMFH_SYM 3
    48	#define ROMFH_BLK 4
    49	#define ROMFH_CHR 5
    50	#define ROMFH_SCK 6
    51	#define ROMFH_FIF 7
    52	#define ROMFH_EXEC 8
    53	
    54	/* Alignment */
    55	
    56	#define ROMFH_SIZE 16
    57	#define ROMFH_PAD (ROMFH_SIZE-1)
    58	#define ROMFH_MASK (~ROMFH_PAD)
    59	
    60	#endif