fs/minix/minix.h

   1 #include <linux/fs.h>
   2 #include <linux/pagemap.h>
   3 #include <linux/minix_fs.h>
   4
   5 /*
   6  * change the define below to 0 if you want names > info->s_namelen chars to be
   7  * truncated. Else they will be disallowed (ENAMETOOLONG).
   8  */
   9 #define NO_TRUNCATE 1
  10 #define INODE_VERSION(inode)    minix_sb(inode->i_sb)->s_version
  11 #define MINIX_V1                0x0001          /* original minix fs */
  12 #define MINIX_V2                0x0002          /* minix V2 fs */
  13 #define MINIX_V3                0x0003          /* minix V3 fs */
  14
  15 /*
  16  * minix fs inode data in memory
  17  */
  18 struct minix_inode_info {
  19         union {
  20                 __u16 i1_data[16];
  21                 __u32 i2_data[16];
  22         } u;
  23         struct inode vfs_inode;
  24 };
  25
  26 /*
  27  * minix super-block data in memory
  28  */
  29 struct minix_sb_info {
  30         unsigned long s_ninodes;
  31         unsigned long s_nzones;
  32         unsigned long s_imap_blocks;
  33         unsigned long s_zmap_blocks;
  34         unsigned long s_firstdatazone;
  35         unsigned long s_log_zone_size;
  36         unsigned long s_max_size;
  37         int s_dirsize;
  38         int s_namelen;
  39         int s_link_max;
  40         struct buffer_head ** s_imap;
  41         struct buffer_head ** s_zmap;
  42         struct buffer_head * s_sbh;
  43         struct minix_super_block * s_ms;
  44         unsigned short s_mount_state;
  45         unsigned short s_version;
  46 };
  47
  48 extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
  49 extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
  50 extern struct inode * minix_new_inode(const struct inode * dir, int * error);
  51 extern void minix_free_inode(struct inode * inode);
  52 extern unsigned long minix_count_free_inodes(struct minix_sb_info *sbi);
  53 extern int minix_new_block(struct inode * inode);
  54 extern void minix_free_block(struct inode *inode, unsigned long block);
  55 extern unsigned long minix_count_free_blocks(struct minix_sb_info *sbi);
  56 extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *);
  57 extern int __minix_write_begin(struct file *file, struct address_space *mapping,
  58                         loff_t pos, unsigned len, unsigned flags,
  59                         struct page **pagep, void **fsdata);
  60
  61 extern void V1_minix_truncate(struct inode *);
  62 extern void V2_minix_truncate(struct inode *);
  63 extern void minix_truncate(struct inode *);
  64 extern int minix_sync_inode(struct inode *);
  65 extern void minix_set_inode(struct inode *, dev_t);
  66 extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
  67 extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
  68 extern unsigned V1_minix_blocks(loff_t, struct super_block *);
  69 extern unsigned V2_minix_blocks(loff_t, struct super_block *);
  70
  71 extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);
  72 extern int minix_add_link(struct dentry*, struct inode*);
  73 extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
  74 extern int minix_make_empty(struct inode*, struct inode*);
  75 extern int minix_empty_dir(struct inode*);
  76 extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
  77 extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
  78 extern ino_t minix_inode_by_name(struct dentry*);
  79 extern int minix_sync_file(struct file *, struct dentry *, int);
  80
  81 extern const struct inode_operations minix_file_inode_operations;
  82 extern const struct inode_operations minix_dir_inode_operations;
  83 extern const struct file_operations minix_file_operations;
  84 extern const struct file_operations minix_dir_operations;
  85 extern struct dentry_operations minix_dentry_operations;
  86
  87 static inline struct minix_sb_info *minix_sb(struct super_block *sb)
  88 {
  89         return sb->s_fs_info;
  90 }
  91
  92 static inline struct minix_inode_info *minix_i(struct inode *inode)
  93 {
  94         return list_entry(inode, struct minix_inode_info, vfs_inode);
  95 }