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Release 4.10 fs/nilfs2/alloc.h

Directory: fs/nilfs2
 * alloc.h - persistent object (dat entry/disk inode) allocator/deallocator
 * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * GNU General Public License for more details.
 * Originally written by Koji Sato.
 * Two allocators were unified by Ryusuke Konishi and Amagai Yoshiji.

#ifndef _NILFS_ALLOC_H

#define _NILFS_ALLOC_H

#include <linux/types.h>
#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) { return 1UL << (inode->i_blkbits + 3 /* log2(8 = CHAR_BITS) */); }


ryusuke konishiryusuke konishi26100.00%1100.00%

int nilfs_palloc_init_blockgroup(struct inode *, unsigned int); int nilfs_palloc_get_entry_block(struct inode *, __u64, int, struct buffer_head **); 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) * @pr_desc_bh: buffer head of the buffer containing block group descriptors * @pr_bitmap_bh: buffer head of the buffer containing a block group bitmap * @pr_entry_bh: buffer head of the buffer containing translation entries */ struct nilfs_palloc_req { __u64 pr_entry_nr; struct buffer_head *pr_desc_bh; struct buffer_head *pr_bitmap_bh; struct buffer_head *pr_entry_bh; }; int nilfs_palloc_prepare_alloc_entry(struct inode *, struct nilfs_palloc_req *); void nilfs_palloc_commit_alloc_entry(struct inode *, struct nilfs_palloc_req *); void nilfs_palloc_abort_alloc_entry(struct inode *, struct nilfs_palloc_req *); void nilfs_palloc_commit_free_entry(struct inode *, struct nilfs_palloc_req *); int nilfs_palloc_prepare_free_entry(struct inode *, struct nilfs_palloc_req *); void nilfs_palloc_abort_free_entry(struct inode *, struct nilfs_palloc_req *); 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 find_next_zero_bit_le #define nilfs_find_next_bit find_next_bit_le /** * 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; struct nilfs_bh_assoc prev_bitmap; struct nilfs_bh_assoc prev_entry; }; void nilfs_palloc_setup_cache(struct inode *inode, struct nilfs_palloc_cache *cache); void nilfs_palloc_clear_cache(struct inode *inode); void nilfs_palloc_destroy_cache(struct inode *inode); #endif /* _NILFS_ALLOC_H */

Overall Contributors

ryusuke konishiryusuke konishi28494.67%770.00%
vyacheslav dubeykovyacheslav dubeyko155.00%220.00%
akinobu mitaakinobu mita10.33%110.00%
Directory: fs/nilfs2
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