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f4fa27c16b
Somehow we got the layout of the v3 superblock wrong, which causes crashes due to overindexing of the buffer_head array in statfs on large fielsystems. Cc: "Cedric Augonnet" <cedric.augonnet@gmail.com> Cc: "Daniel Aragones" <danarag@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
106 lines
2.0 KiB
C
106 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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__u32 s_ninodes;
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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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