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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
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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 *);
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57
58struct nilfs_palloc_req {
59 __u64 pr_entry_nr;
60 struct buffer_head *pr_desc_bh;
61 struct buffer_head *pr_bitmap_bh;
62 struct buffer_head *pr_entry_bh;
63};
64
65int nilfs_palloc_prepare_alloc_entry(struct inode *,
66 struct nilfs_palloc_req *);
67void nilfs_palloc_commit_alloc_entry(struct inode *,
68 struct nilfs_palloc_req *);
69void nilfs_palloc_abort_alloc_entry(struct inode *, struct nilfs_palloc_req *);
70void nilfs_palloc_commit_free_entry(struct inode *, struct nilfs_palloc_req *);
71int nilfs_palloc_prepare_free_entry(struct inode *, struct nilfs_palloc_req *);
72void nilfs_palloc_abort_free_entry(struct inode *, struct nilfs_palloc_req *);
73int nilfs_palloc_freev(struct inode *, __u64 *, size_t);
74
75#define nilfs_set_bit_atomic ext2_set_bit_atomic
76#define nilfs_clear_bit_atomic ext2_clear_bit_atomic
77#define nilfs_find_next_zero_bit ext2_find_next_zero_bit
78
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82
83struct nilfs_bh_assoc {
84 unsigned long blkoff;
85 struct buffer_head *bh;
86};
87
88struct nilfs_palloc_cache {
89 spinlock_t lock;
90 struct nilfs_bh_assoc prev_desc;
91 struct nilfs_bh_assoc prev_bitmap;
92 struct nilfs_bh_assoc prev_entry;
93};
94
95void nilfs_palloc_setup_cache(struct inode *inode,
96 struct nilfs_palloc_cache *cache);
97void nilfs_palloc_clear_cache(struct inode *inode);
98void nilfs_palloc_destroy_cache(struct inode *inode);
99
100#endif
101