fs/minix/minix.h

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