61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef __LINUX_ROMFS_FS_H
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#define __LINUX_ROMFS_FS_H
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#include <linux/types.h>
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#include <linux/fs.h>
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/* The basic structures of the romfs filesystem */
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#define ROMBSIZE BLOCK_SIZE
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#define ROMBSBITS BLOCK_SIZE_BITS
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#define ROMBMASK (ROMBSIZE-1)
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#define ROMFS_MAGIC 0x7275
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#define ROMFS_MAXFN 128
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#define __mkw(h,l) (((h)&0x00ff)<< 8|((l)&0x00ff))
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#define __mkl(h,l) (((h)&0xffff)<<16|((l)&0xffff))
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#define __mk4(a,b,c,d) cpu_to_be32(__mkl(__mkw(a,b),__mkw(c,d)))
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#define ROMSB_WORD0 __mk4('-','r','o','m')
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#define ROMSB_WORD1 __mk4('1','f','s','-')
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/* On-disk "super block" */
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struct romfs_super_block {
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__be32 word0;
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__be32 word1;
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__be32 size;
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__be32 checksum;
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char name[]; /* volume name */
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};
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/* On disk inode */
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struct romfs_inode {
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__be32 next; /* low 4 bits see ROMFH_ */
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__be32 spec;
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__be32 size;
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__be32 checksum;
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char name[];
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};
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#define ROMFH_TYPE 7
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#define ROMFH_HRD 0
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#define ROMFH_DIR 1
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#define ROMFH_REG 2
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#define ROMFH_SYM 3
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#define ROMFH_BLK 4
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#define ROMFH_CHR 5
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#define ROMFH_SCK 6
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#define ROMFH_FIF 7
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#define ROMFH_EXEC 8
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/* Alignment */
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#define ROMFH_SIZE 16
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#define ROMFH_PAD (ROMFH_SIZE-1)
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#define ROMFH_MASK (~ROMFH_PAD)
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#endif
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