LXR linux/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 */
  18struct 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 */
  29struct 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
  48extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
  49extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
  50extern struct inode * minix_new_inode(const struct inode * dir, int * error);
  51extern void minix_free_inode(struct inode * inode);
  52extern unsigned long minix_count_free_inodes(struct minix_sb_info *sbi);
  53extern int minix_new_block(struct inode * inode);
  54extern void minix_free_block(struct inode *inode, unsigned long block);
  55extern unsigned long minix_count_free_blocks(struct minix_sb_info *sbi);
  56extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *);
  57extern 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
  61extern void V1_minix_truncate(struct inode *);
  62extern void V2_minix_truncate(struct inode *);
  63extern void minix_truncate(struct inode *);
  64extern int minix_sync_inode(struct inode *);
  65extern void minix_set_inode(struct inode *, dev_t);
  66extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
  67extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
  68extern unsigned V1_minix_blocks(loff_t, struct super_block *);
  69extern unsigned V2_minix_blocks(loff_t, struct super_block *);
  70
  71extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);
  72extern int minix_add_link(struct dentry*, struct inode*);
  73extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
  74extern int minix_make_empty(struct inode*, struct inode*);
  75extern int minix_empty_dir(struct inode*);
  76extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
  77extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
  78extern ino_t minix_inode_by_name(struct dentry*);
  79extern int minix_sync_file(struct file *, struct dentry *, int);
  80
  81extern const struct inode_operations minix_file_inode_operations;
  82extern const struct inode_operations minix_dir_inode_operations;
  83extern const struct file_operations minix_file_operations;
  84extern const struct file_operations minix_dir_operations;
  85extern struct dentry_operations minix_dentry_operations;
  86
  87static inline struct minix_sb_info *minix_sb(struct super_block *sb)
  88{
  89        return sb->s_fs_info;
  90}
  91
  92static inline struct minix_inode_info *minix_i(struct inode *inode)
  93{
  94        return list_entry(inode, struct minix_inode_info, vfs_inode);
  95}
  96