diff options
Diffstat (limited to 'fs/nilfs2/alloc.h')
| -rw-r--r-- | fs/nilfs2/alloc.h | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/fs/nilfs2/alloc.h b/fs/nilfs2/alloc.h index 5cccf874d69..4bd6451b570 100644 --- a/fs/nilfs2/alloc.h +++ b/fs/nilfs2/alloc.h @@ -29,6 +29,13 @@ #include <linux/buffer_head.h> #include <linux/fs.h> +/** + * nilfs_palloc_entries_per_group - get the number of entries per group + * @inode: inode of metadata file using this allocator + * + * The number of entries per group is defined by the number of bits + * that a bitmap block can maintain. + */ static inline unsigned long nilfs_palloc_entries_per_group(const struct inode *inode) { @@ -41,6 +48,8 @@ int nilfs_palloc_get_entry_block(struct inode *, __u64, int, void *nilfs_palloc_block_get_entry(const struct inode *, __u64, const struct buffer_head *, void *); +int nilfs_palloc_count_max_entries(struct inode *, u64, u64 *); + /** * nilfs_palloc_req - persistent allocator request and reply * @pr_entry_nr: entry number (vblocknr or inode number) @@ -67,17 +76,25 @@ int nilfs_palloc_freev(struct inode *, __u64 *, size_t); #define nilfs_set_bit_atomic ext2_set_bit_atomic #define nilfs_clear_bit_atomic ext2_clear_bit_atomic -#define nilfs_find_next_zero_bit ext2_find_next_zero_bit +#define nilfs_find_next_zero_bit find_next_zero_bit_le -/* - * persistent object allocator cache +/** + * struct nilfs_bh_assoc - block offset and buffer head association + * @blkoff: block offset + * @bh: buffer head */ - struct nilfs_bh_assoc { unsigned long blkoff; struct buffer_head *bh; }; +/** + * struct nilfs_palloc_cache - persistent object allocator cache + * @lock: cache protecting lock + * @prev_desc: blockgroup descriptors cache + * @prev_bitmap: blockgroup bitmap cache + * @prev_entry: translation entries cache + */ struct nilfs_palloc_cache { spinlock_t lock; struct nilfs_bh_assoc prev_desc; |