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11#ifndef _NILFS_ALLOC_H
12#define _NILFS_ALLOC_H
13
14#include <linux/types.h>
15#include <linux/buffer_head.h>
16#include <linux/fs.h>
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25static inline unsigned long
26nilfs_palloc_entries_per_group(const struct inode *inode)
27{
28 return 1UL << (inode->i_blkbits + 3 );
29}
30
31int nilfs_palloc_init_blockgroup(struct inode *, unsigned int);
32int nilfs_palloc_get_entry_block(struct inode *, __u64, int,
33 struct buffer_head **);
34void *nilfs_palloc_block_get_entry(const struct inode *, __u64,
35 const struct buffer_head *, void *);
36
37int nilfs_palloc_count_max_entries(struct inode *, u64, u64 *);
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46struct nilfs_palloc_req {
47 __u64 pr_entry_nr;
48 struct buffer_head *pr_desc_bh;
49 struct buffer_head *pr_bitmap_bh;
50 struct buffer_head *pr_entry_bh;
51};
52
53int nilfs_palloc_prepare_alloc_entry(struct inode *,
54 struct nilfs_palloc_req *);
55void nilfs_palloc_commit_alloc_entry(struct inode *,
56 struct nilfs_palloc_req *);
57void nilfs_palloc_abort_alloc_entry(struct inode *, struct nilfs_palloc_req *);
58void nilfs_palloc_commit_free_entry(struct inode *, struct nilfs_palloc_req *);
59int nilfs_palloc_prepare_free_entry(struct inode *, struct nilfs_palloc_req *);
60void nilfs_palloc_abort_free_entry(struct inode *, struct nilfs_palloc_req *);
61int nilfs_palloc_freev(struct inode *, __u64 *, size_t);
62
63#define nilfs_set_bit_atomic ext2_set_bit_atomic
64#define nilfs_clear_bit_atomic ext2_clear_bit_atomic
65#define nilfs_find_next_zero_bit find_next_zero_bit_le
66#define nilfs_find_next_bit find_next_bit_le
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73struct nilfs_bh_assoc {
74 unsigned long blkoff;
75 struct buffer_head *bh;
76};
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85struct nilfs_palloc_cache {
86 spinlock_t lock;
87 struct nilfs_bh_assoc prev_desc;
88 struct nilfs_bh_assoc prev_bitmap;
89 struct nilfs_bh_assoc prev_entry;
90};
91
92void nilfs_palloc_setup_cache(struct inode *inode,
93 struct nilfs_palloc_cache *cache);
94void nilfs_palloc_clear_cache(struct inode *inode);
95void nilfs_palloc_destroy_cache(struct inode *inode);
96
97#endif
98