135 lines
4.1 KiB
C
135 lines
4.1 KiB
C
#ifndef _LINUX_MINIX_FS_H
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#define _LINUX_MINIX_FS_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_SUPER_MAGIC 0x137F /* original minix fs */
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#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
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#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
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#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
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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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#define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))
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#define MINIX_V1 0x0001 /* original minix fs */
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#define MINIX_V2 0x0002 /* minix V2 fs */
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#define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
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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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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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#ifdef __KERNEL__
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/*
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* change the define below to 0 if you want names > info->s_namelen chars to be
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* truncated. Else they will be disallowed (ENAMETOOLONG).
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*/
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#define NO_TRUNCATE 1
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extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
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extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
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extern struct inode * minix_new_inode(const struct inode * dir, int * error);
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extern void minix_free_inode(struct inode * inode);
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extern unsigned long minix_count_free_inodes(struct super_block *sb);
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extern int minix_new_block(struct inode * inode);
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extern void minix_free_block(struct inode * inode, int block);
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extern unsigned long minix_count_free_blocks(struct super_block *sb);
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extern void V1_minix_truncate(struct inode *);
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extern void V2_minix_truncate(struct inode *);
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extern void minix_truncate(struct inode *);
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extern int minix_sync_inode(struct inode *);
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extern void minix_set_inode(struct inode *, dev_t);
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extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
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extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
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extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);
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extern int minix_add_link(struct dentry*, struct inode*);
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extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
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extern int minix_make_empty(struct inode*, struct inode*);
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extern int minix_empty_dir(struct inode*);
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extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
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extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
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extern ino_t minix_inode_by_name(struct dentry*);
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extern int minix_sync_file(struct file *, struct dentry *, int);
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extern struct inode_operations minix_file_inode_operations;
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extern struct inode_operations minix_dir_inode_operations;
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extern struct file_operations minix_file_operations;
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extern struct file_operations minix_dir_operations;
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extern struct dentry_operations minix_dentry_operations;
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#endif /* __KERNEL__ */
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#endif
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