1#ifndef _LINUX_MINIX_FS_H 2#define _LINUX_MINIX_FS_H 3 4/* 5 * The minix filesystem constants/structures 6 */ 7 8/* 9 * Thanks to Kees J Bot for sending me the definitions of the new 10 * minix filesystem (aka V2) with bigger inodes and 32-bit block 11 * pointers. 12 */ 13 14#define MINIX_ROOT_INO 1 15 16/* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */ 17#define MINIX_LINK_MAX 250 18#define MINIX2_LINK_MAX 65530 19 20#define MINIX_I_MAP_SLOTS 8 21#define MINIX_Z_MAP_SLOTS 64 22#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */ 23#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */ 24#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */ 25#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */ 26#define MINIX_VALID_FS 0x0001 /* Clean fs. */ 27#define MINIX_ERROR_FS 0x0002 /* fs has errors. */ 28 29#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode))) 30#define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode))) 31 32#define MINIX_V1 0x0001 /* original minix fs */ 33#define MINIX_V2 0x0002 /* minix V2 fs */ 34 35#define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version 36 37/* 38 * This is the original minix inode layout on disk. 39 * Note the 8-bit gid and atime and ctime. 40 */ 41struct minix_inode { 42 __u16 i_mode; 43 __u16 i_uid; 44 __u32 i_size; 45 __u32 i_time; 46 __u8 i_gid; 47 __u8 i_nlinks; 48 __u16 i_zone[9]; 49}; 50 51/* 52 * The new minix inode has all the time entries, as well as 53 * long block numbers and a third indirect block (7+1+1+1 54 * instead of 7+1+1). Also, some previously 8-bit values are 55 * now 16-bit. The inode is now 64 bytes instead of 32. 56 */ 57struct minix2_inode { 58 __u16 i_mode; 59 __u16 i_nlinks; 60 __u16 i_uid; 61 __u16 i_gid; 62 __u32 i_size; 63 __u32 i_atime; 64 __u32 i_mtime; 65 __u32 i_ctime; 66 __u32 i_zone[10]; 67}; 68 69/* 70 * minix super-block data on disk 71 */ 72struct minix_super_block { 73 __u16 s_ninodes; 74 __u16 s_nzones; 75 __u16 s_imap_blocks; 76 __u16 s_zmap_blocks; 77 __u16 s_firstdatazone; 78 __u16 s_log_zone_size; 79 __u32 s_max_size; 80 __u16 s_magic; 81 __u16 s_state; 82 __u32 s_zones; 83}; 84 85struct minix_dir_entry { 86 __u16 inode; 87 char name[0]; 88}; 89 90#ifdef __KERNEL__ 91 92/* 93 * change the define below to 0 if you want names > info->s_namelen chars to be 94 * truncated. Else they will be disallowed (ENAMETOOLONG). 95 */ 96#define NO_TRUNCATE 1 97 98extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **); 99extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **); 100extern struct inode * minix_new_inode(const struct inode * dir, int * error); 101extern void minix_free_inode(struct inode * inode); 102extern unsigned long minix_count_free_inodes(struct super_block *sb); 103extern int minix_new_block(struct inode * inode); 104extern void minix_free_block(struct inode * inode, int block); 105extern unsigned long minix_count_free_blocks(struct super_block *sb); 106 107extern void V1_minix_truncate(struct inode *); 108extern void V2_minix_truncate(struct inode *); 109extern void minix_truncate(struct inode *); 110extern int minix_sync_inode(struct inode *); 111extern void minix_set_inode(struct inode *, dev_t); 112extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int); 113extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int); 114 115extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**); 116extern int minix_add_link(struct dentry*, struct inode*); 117extern int minix_delete_entry(struct minix_dir_entry*, struct page*); 118extern int minix_make_empty(struct inode*, struct inode*); 119extern int minix_empty_dir(struct inode*); 120extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*); 121extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**); 122extern ino_t minix_inode_by_name(struct dentry*); 123 124extern int minix_sync_file(struct file *, struct dentry *, int); 125 126extern struct inode_operations minix_file_inode_operations; 127extern struct inode_operations minix_dir_inode_operations; 128extern struct file_operations minix_file_operations; 129extern struct file_operations minix_dir_operations; 130extern struct dentry_operations minix_dentry_operations; 131 132#endif /* __KERNEL__ */ 133 134#endif 135