Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0+ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * alloc.h - persistent object (dat entry/disk inode) allocator/deallocator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Originally written by Koji Sato.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * Two allocators were unified by Ryusuke Konishi and Amagai Yoshiji.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #ifndef _NILFS_ALLOC_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define _NILFS_ALLOC_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  * nilfs_palloc_entries_per_group - get the number of entries per group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)  * @inode: inode of metadata file using this allocator
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)  * The number of entries per group is defined by the number of bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)  * that a bitmap block can maintain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static inline unsigned long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) nilfs_palloc_entries_per_group(const struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	return 1UL << (inode->i_blkbits + 3 /* log2(8 = CHAR_BITS) */);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) int nilfs_palloc_init_blockgroup(struct inode *, unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) int nilfs_palloc_get_entry_block(struct inode *, __u64, int,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 				 struct buffer_head **);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) void *nilfs_palloc_block_get_entry(const struct inode *, __u64,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 				   const struct buffer_head *, void *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int nilfs_palloc_count_max_entries(struct inode *, u64, u64 *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)  * nilfs_palloc_req - persistent allocator request and reply
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)  * @pr_entry_nr: entry number (vblocknr or inode number)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)  * @pr_desc_bh: buffer head of the buffer containing block group descriptors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)  * @pr_bitmap_bh: buffer head of the buffer containing a block group bitmap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)  * @pr_entry_bh: buffer head of the buffer containing translation entries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct nilfs_palloc_req {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	__u64 pr_entry_nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	struct buffer_head *pr_desc_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	struct buffer_head *pr_bitmap_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	struct buffer_head *pr_entry_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) int nilfs_palloc_prepare_alloc_entry(struct inode *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 				     struct nilfs_palloc_req *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) void nilfs_palloc_commit_alloc_entry(struct inode *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 				     struct nilfs_palloc_req *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) void nilfs_palloc_abort_alloc_entry(struct inode *, struct nilfs_palloc_req *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) void nilfs_palloc_commit_free_entry(struct inode *, struct nilfs_palloc_req *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int nilfs_palloc_prepare_free_entry(struct inode *, struct nilfs_palloc_req *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) void nilfs_palloc_abort_free_entry(struct inode *, struct nilfs_palloc_req *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) int nilfs_palloc_freev(struct inode *, __u64 *, size_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define nilfs_set_bit_atomic		ext2_set_bit_atomic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define nilfs_clear_bit_atomic		ext2_clear_bit_atomic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define nilfs_find_next_zero_bit	find_next_zero_bit_le
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define nilfs_find_next_bit		find_next_bit_le
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)  * struct nilfs_bh_assoc - block offset and buffer head association
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)  * @blkoff: block offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)  * @bh: buffer head
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct nilfs_bh_assoc {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	unsigned long blkoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)  * struct nilfs_palloc_cache - persistent object allocator cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)  * @lock: cache protecting lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)  * @prev_desc: blockgroup descriptors cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)  * @prev_bitmap: blockgroup bitmap cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)  * @prev_entry: translation entries cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct nilfs_palloc_cache {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 	spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 	struct nilfs_bh_assoc prev_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 	struct nilfs_bh_assoc prev_bitmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) 	struct nilfs_bh_assoc prev_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) void nilfs_palloc_setup_cache(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) 			      struct nilfs_palloc_cache *cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) void nilfs_palloc_clear_cache(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) void nilfs_palloc_destroy_cache(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #endif	/* _NILFS_ALLOC_H */