fs/minix/minix.h

   1 #ifndef FS_MINIX_H
   2 #define FS_MINIX_H
   3
   4 #include <linux/fs.h>
   5 #include <linux/pagemap.h>
   6 #include <linux/minix_fs.h>
   7
   8 #define INODE_VERSION(inode)    minix_sb(inode->i_sb)->s_version
   9 #define MINIX_V1                0x0001          /* original minix fs */
  10 #define MINIX_V2                0x0002          /* minix V2 fs */
  11 #define MINIX_V3                0x0003          /* minix V3 fs */
  12
  13 /*
  14  * minix fs inode data in memory
  15  */
  16 struct minix_inode_info {
  17         union {
  18                 __u16 i1_data[16];
  19                 __u32 i2_data[16];
  20         } u;
  21         struct inode vfs_inode;
  22 };
  23
  24 /*
  25  * minix super-block data in memory
  26  */
  27 struct minix_sb_info {
  28         unsigned long s_ninodes;
  29         unsigned long s_nzones;
  30         unsigned long s_imap_blocks;
  31         unsigned long s_zmap_blocks;
  32         unsigned long s_firstdatazone;
  33         unsigned long s_log_zone_size;
  34         unsigned long s_max_size;
  35         int s_dirsize;
  36         int s_namelen;
  37         int s_link_max;
  38         struct buffer_head ** s_imap;
  39         struct buffer_head ** s_zmap;
  40         struct buffer_head * s_sbh;
  41         struct minix_super_block * s_ms;
  42         unsigned short s_mount_state;
  43         unsigned short s_version;
  44 };
  45
  46 extern struct inode *minix_iget(struct super_block *, unsigned long);
  47 extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
  48 extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
  49 extern struct inode * minix_new_inode(const struct inode * dir, int * error);
  50 extern void minix_free_inode(struct inode * inode);
  51 extern unsigned long minix_count_free_inodes(struct minix_sb_info *sbi);
  52 extern int minix_new_block(struct inode * inode);
  53 extern void minix_free_block(struct inode *inode, unsigned long block);
  54 extern unsigned long minix_count_free_blocks(struct minix_sb_info *sbi);
  55 extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *);
  56 extern int __minix_write_begin(struct file *file, struct address_space *mapping,
  57                         loff_t pos, unsigned len, unsigned flags,
  58                         struct page **pagep, void **fsdata);
  59
  60 extern void V1_minix_truncate(struct inode *);
  61 extern void V2_minix_truncate(struct inode *);
  62 extern void minix_truncate(struct inode *);
  63 extern void minix_set_inode(struct inode *, dev_t);
  64 extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
  65 extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
  66 extern unsigned V1_minix_blocks(loff_t, struct super_block *);
  67 extern unsigned V2_minix_blocks(loff_t, struct super_block *);
  68
  69 extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);
  70 extern int minix_add_link(struct dentry*, struct inode*);
  71 extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
  72 extern int minix_make_empty(struct inode*, struct inode*);
  73 extern int minix_empty_dir(struct inode*);
  74 extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
  75 extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
  76 extern ino_t minix_inode_by_name(struct dentry*);
  77
  78 extern const struct inode_operations minix_file_inode_operations;
  79 extern const struct inode_operations minix_dir_inode_operations;
  80 extern const struct file_operations minix_file_operations;
  81 extern const struct file_operations minix_dir_operations;
  82
  83 static inline struct minix_sb_info *minix_sb(struct super_block *sb)
  84 {
  85         return sb->s_fs_info;
  86 }
  87
  88 static inline struct minix_inode_info *minix_i(struct inode *inode)
  89 {
  90         return list_entry(inode, struct minix_inode_info, vfs_inode);
  91 }
  92
  93 #endif /* FS_MINIX_H */