mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 02:30:34 +02:00
94ee1d9151
Remove filenames that are not particularly useful in file comments, and suppress checkpatch warnings WARNING: It's generally not useful to have the filename in the file Link: https://lkml.kernel.org/r/1635151862-11547-3-git-send-email-konishi.ryusuke@gmail.com Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Cc: Qing Wang <wangqing@vivo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
97 lines
3.2 KiB
C
97 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Persistent object (dat entry/disk inode) allocator/deallocator
|
|
*
|
|
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
|
|
*
|
|
* 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) */);
|
|
}
|
|
|
|
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 */
|