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gerrit-public.fairphone.software / kernel / msm-4.9 / 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 / . / fs / minix / minix.h
blob: e42a8bb890013bf27b717c3b6458133cb34ab124 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame^]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
11#define INODE_VERSION(inode) minix_sb(inode->i_sb)->s_version
12
13#define MINIX_V1 0x0001 /* original minix fs */
14#define MINIX_V2 0x0002 /* minix V2 fs */
15
16/*
17 * minix fs inode data in memory
18 */
19struct minix_inode_info {
20 union {
21 __u16 i1_data[16];
22 __u32 i2_data[16];
23 } u;
24 struct inode vfs_inode;
25};
26
27/*
28 * minix super-block data in memory
29 */
30struct minix_sb_info {
31 unsigned long s_ninodes;
32 unsigned long s_nzones;
33 unsigned long s_imap_blocks;
34 unsigned long s_zmap_blocks;
35 unsigned long s_firstdatazone;
36 unsigned long s_log_zone_size;
37 unsigned long s_max_size;
38 int s_dirsize;
39 int s_namelen;
40 int s_link_max;
41 struct buffer_head ** s_imap;
42 struct buffer_head ** s_zmap;
43 struct buffer_head * s_sbh;
44 struct minix_super_block * s_ms;
45 unsigned short s_mount_state;
46 unsigned short s_version;
47};
48
49extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
50extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
51extern struct inode * minix_new_inode(const struct inode * dir, int * error);
52extern void minix_free_inode(struct inode * inode);
53extern unsigned long minix_count_free_inodes(struct minix_sb_info *sbi);
54extern int minix_new_block(struct inode * inode);
55extern void minix_free_block(struct inode * inode, int block);
56extern unsigned long minix_count_free_blocks(struct minix_sb_info *sbi);
57
58extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *);
59
60extern void V2_minix_truncate(struct inode *);
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);
69extern unsigned V2_minix_blocks(loff_t);
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*);
79
80extern int minix_sync_file(struct file *, struct dentry *, int);
81
82extern struct inode_operations minix_file_inode_operations;
83extern struct inode_operations minix_dir_inode_operations;
84extern struct file_operations minix_file_operations;
85extern struct file_operations minix_dir_operations;
86extern struct dentry_operations minix_dentry_operations;
87
88static inline struct minix_sb_info *minix_sb(struct super_block *sb)
89{
90 return sb->s_fs_info;
91}
92
93static inline struct minix_inode_info *minix_i(struct inode *inode)
94{
95 return list_entry(inode, struct minix_inode_info, vfs_inode);
96}