1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25#ifndef _NILFS_ALLOC_H
26#define _NILFS_ALLOC_H
27
28#include <linux/types.h>
29#include <linux/buffer_head.h>
30#include <linux/fs.h>
31
32
33
34
35
36
37
38
39static inline unsigned long
40nilfs_palloc_entries_per_group(const struct inode *inode)
41{
42 return 1UL << (inode->i_blkbits + 3 );
43}
44
45int nilfs_palloc_init_blockgroup(struct inode *, unsigned);
46int nilfs_palloc_get_entry_block(struct inode *, __u64, int,
47 struct buffer_head **);
48void *nilfs_palloc_block_get_entry(const struct inode *, __u64,
49 const struct buffer_head *, void *);
50
51int nilfs_palloc_count_max_entries(struct inode *, u64, u64 *);
52
53
54
55
56
57
58
59
60struct nilfs_palloc_req {
61 __u64 pr_entry_nr;
62 struct buffer_head *pr_desc_bh;
63 struct buffer_head *pr_bitmap_bh;
64 struct buffer_head *pr_entry_bh;
65};
66
67int nilfs_palloc_prepare_alloc_entry(struct inode *,
68 struct nilfs_palloc_req *);
69void nilfs_palloc_commit_alloc_entry(struct inode *,
70 struct nilfs_palloc_req *);
71void nilfs_palloc_abort_alloc_entry(struct inode *, struct nilfs_palloc_req *);
72void nilfs_palloc_commit_free_entry(struct inode *, struct nilfs_palloc_req *);
73int nilfs_palloc_prepare_free_entry(struct inode *, struct nilfs_palloc_req *);
74void nilfs_palloc_abort_free_entry(struct inode *, struct nilfs_palloc_req *);
75int nilfs_palloc_freev(struct inode *, __u64 *, size_t);
76
77#define nilfs_set_bit_atomic ext2_set_bit_atomic
78#define nilfs_clear_bit_atomic ext2_clear_bit_atomic
79#define nilfs_find_next_zero_bit find_next_zero_bit_le
80
81
82
83
84
85
86struct nilfs_bh_assoc {
87 unsigned long blkoff;
88 struct buffer_head *bh;
89};
90
91
92
93
94
95
96
97
98struct nilfs_palloc_cache {
99 spinlock_t lock;
100 struct nilfs_bh_assoc prev_desc;
101 struct nilfs_bh_assoc prev_bitmap;
102 struct nilfs_bh_assoc prev_entry;
103};
104
105void nilfs_palloc_setup_cache(struct inode *inode,
106 struct nilfs_palloc_cache *cache);
107void nilfs_palloc_clear_cache(struct inode *inode);
108void nilfs_palloc_destroy_cache(struct inode *inode);
109
110#endif
111