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939b00df03
This morning I needed to read a Minix V3 filesystem, but unfortunately my 2.6.19 did not support that, and neither did the downloaded 2.6.20rc4. Fortunately, google told me that Daniel Aragones had already done the work, patch found at http://www.terra.es/personal2/danarag/ Unfortunaly, looking at the patch was painful to my eyes, so I polished it a bit before applying. The resulting kernel boots, and reads the filesystem it needed to read. Signed-off-by: Daniel Aragones <danarag@gmail.com> Signed-off-by: Andries Brouwer <aeb@cwi.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
107 lines
2.0 KiB
C
107 lines
2.0 KiB
C
#ifndef _LINUX_MINIX_FS_H
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#define _LINUX_MINIX_FS_H
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#include <linux/magic.h>
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/*
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* The minix filesystem constants/structures
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*/
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/*
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* Thanks to Kees J Bot for sending me the definitions of the new
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* minix filesystem (aka V2) with bigger inodes and 32-bit block
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* pointers.
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*/
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#define MINIX_ROOT_INO 1
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/* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */
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#define MINIX_LINK_MAX 250
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#define MINIX2_LINK_MAX 65530
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#define MINIX_I_MAP_SLOTS 8
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#define MINIX_Z_MAP_SLOTS 64
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#define MINIX_VALID_FS 0x0001 /* Clean fs. */
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#define MINIX_ERROR_FS 0x0002 /* fs has errors. */
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#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
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/*
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* This is the original minix inode layout on disk.
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* Note the 8-bit gid and atime and ctime.
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*/
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struct minix_inode {
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__u16 i_mode;
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__u16 i_uid;
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__u32 i_size;
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__u32 i_time;
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__u8 i_gid;
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__u8 i_nlinks;
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__u16 i_zone[9];
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};
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/*
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* The new minix inode has all the time entries, as well as
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* long block numbers and a third indirect block (7+1+1+1
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* instead of 7+1+1). Also, some previously 8-bit values are
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* now 16-bit. The inode is now 64 bytes instead of 32.
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*/
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struct minix2_inode {
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__u16 i_mode;
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__u16 i_nlinks;
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__u16 i_uid;
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__u16 i_gid;
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__u32 i_size;
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__u32 i_atime;
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__u32 i_mtime;
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__u32 i_ctime;
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__u32 i_zone[10];
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};
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/*
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* minix super-block data on disk
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*/
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struct minix_super_block {
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__u16 s_ninodes;
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__u16 s_nzones;
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__u16 s_imap_blocks;
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__u16 s_zmap_blocks;
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__u16 s_firstdatazone;
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__u16 s_log_zone_size;
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__u32 s_max_size;
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__u16 s_magic;
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__u16 s_state;
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__u32 s_zones;
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};
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/*
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* V3 minix super-block data on disk
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*/
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struct minix3_super_block {
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__u16 s_ninodes;
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__u16 s_nzones;
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__u16 s_pad0;
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__u16 s_imap_blocks;
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__u16 s_zmap_blocks;
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__u16 s_firstdatazone;
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__u16 s_log_zone_size;
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__u16 s_pad1;
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__u32 s_max_size;
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__u32 s_zones;
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__u16 s_magic;
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__u16 s_pad2;
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__u16 s_blocksize;
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__u8 s_disk_version;
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};
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struct minix_dir_entry {
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__u16 inode;
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char name[0];
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};
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struct minix3_dir_entry {
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__u32 inode;
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char name[0];
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};
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#endif
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