1 /* SPDX-License-Identifier: GPL-2.0+ */ <<
2 /* 1 /*
3 * Persistent object (dat entry/disk inode) al !! 2 * alloc.h - persistent object (dat entry/disk inode) allocator/deallocator
4 * 3 *
5 * Copyright (C) 2006-2008 Nippon Telegraph an 4 * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
6 * 5 *
7 * Originally written by Koji Sato. !! 6 * This program is free software; you can redistribute it and/or modify
8 * Two allocators were unified by Ryusuke Koni !! 7 * it under the terms of the GNU General Public License as published by
>> 8 * the Free Software Foundation; either version 2 of the License, or
>> 9 * (at your option) any later version.
>> 10 *
>> 11 * This program is distributed in the hope that it will be useful,
>> 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> 14 * GNU General Public License for more details.
>> 15 *
>> 16 * You should have received a copy of the GNU General Public License
>> 17 * along with this program; if not, write to the Free Software
>> 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
>> 19 *
>> 20 * Original code was written by Koji Sato <koji@osrg.net>.
>> 21 * Two allocators were unified by Ryusuke Konishi <ryusuke@osrg.net>,
>> 22 * Amagai Yoshiji <amagai@osrg.net>.
9 */ 23 */
10 24
11 #ifndef _NILFS_ALLOC_H 25 #ifndef _NILFS_ALLOC_H
12 #define _NILFS_ALLOC_H 26 #define _NILFS_ALLOC_H
13 27
14 #include <linux/types.h> 28 #include <linux/types.h>
15 #include <linux/buffer_head.h> 29 #include <linux/buffer_head.h>
16 #include <linux/fs.h> 30 #include <linux/fs.h>
17 31
18 /** <<
19 * nilfs_palloc_entries_per_group - get the nu <<
20 * @inode: inode of metadata file using this a <<
21 * <<
22 * The number of entries per group is defined <<
23 * that a bitmap block can maintain. <<
24 */ <<
25 static inline unsigned long 32 static inline unsigned long
26 nilfs_palloc_entries_per_group(const struct in 33 nilfs_palloc_entries_per_group(const struct inode *inode)
27 { 34 {
28 return 1UL << (inode->i_blkbits + 3 /* 35 return 1UL << (inode->i_blkbits + 3 /* log2(8 = CHAR_BITS) */);
29 } 36 }
30 37
31 int nilfs_palloc_init_blockgroup(struct inode !! 38 int nilfs_palloc_init_blockgroup(struct inode *, unsigned);
32 int nilfs_palloc_get_entry_block(struct inode 39 int nilfs_palloc_get_entry_block(struct inode *, __u64, int,
33 struct buffer 40 struct buffer_head **);
34 void *nilfs_palloc_block_get_entry(const struc 41 void *nilfs_palloc_block_get_entry(const struct inode *, __u64,
35 const struc 42 const struct buffer_head *, void *);
36 43
37 int nilfs_palloc_count_max_entries(struct inod <<
38 <<
39 /** 44 /**
40 * struct nilfs_palloc_req - persistent alloca !! 45 * nilfs_palloc_req - persistent alloctor request and reply
41 * @pr_entry_nr: entry number (vblocknr or ino 46 * @pr_entry_nr: entry number (vblocknr or inode number)
42 * @pr_desc_bh: buffer head of the buffer cont 47 * @pr_desc_bh: buffer head of the buffer containing block group descriptors
43 * @pr_bitmap_bh: buffer head of the buffer co 48 * @pr_bitmap_bh: buffer head of the buffer containing a block group bitmap
44 * @pr_entry_bh: buffer head of the buffer con 49 * @pr_entry_bh: buffer head of the buffer containing translation entries
45 */ 50 */
46 struct nilfs_palloc_req { 51 struct nilfs_palloc_req {
47 __u64 pr_entry_nr; 52 __u64 pr_entry_nr;
48 struct buffer_head *pr_desc_bh; 53 struct buffer_head *pr_desc_bh;
49 struct buffer_head *pr_bitmap_bh; 54 struct buffer_head *pr_bitmap_bh;
50 struct buffer_head *pr_entry_bh; 55 struct buffer_head *pr_entry_bh;
51 }; 56 };
52 57
53 int nilfs_palloc_prepare_alloc_entry(struct in !! 58 int nilfs_palloc_prepare_alloc_entry(struct inode *,
54 struct ni !! 59 struct nilfs_palloc_req *);
55 void nilfs_palloc_commit_alloc_entry(struct in 60 void nilfs_palloc_commit_alloc_entry(struct inode *,
56 struct ni 61 struct nilfs_palloc_req *);
57 void nilfs_palloc_abort_alloc_entry(struct ino 62 void nilfs_palloc_abort_alloc_entry(struct inode *, struct nilfs_palloc_req *);
58 void nilfs_palloc_commit_free_entry(struct ino 63 void nilfs_palloc_commit_free_entry(struct inode *, struct nilfs_palloc_req *);
59 int nilfs_palloc_prepare_free_entry(struct ino 64 int nilfs_palloc_prepare_free_entry(struct inode *, struct nilfs_palloc_req *);
60 void nilfs_palloc_abort_free_entry(struct inod 65 void nilfs_palloc_abort_free_entry(struct inode *, struct nilfs_palloc_req *);
61 int nilfs_palloc_freev(struct inode *, __u64 * 66 int nilfs_palloc_freev(struct inode *, __u64 *, size_t);
62 67
63 #define nilfs_set_bit_atomic ext2_s 68 #define nilfs_set_bit_atomic ext2_set_bit_atomic
64 #define nilfs_clear_bit_atomic ext2_c 69 #define nilfs_clear_bit_atomic ext2_clear_bit_atomic
65 #define nilfs_find_next_zero_bit find_n !! 70 #define nilfs_find_next_zero_bit ext2_find_next_zero_bit
66 #define nilfs_find_next_bit find_n <<
67 <<
68 /** <<
69 * struct nilfs_bh_assoc - block offset and bu <<
70 * @blkoff: block offset <<
71 * @bh: buffer head <<
72 */ <<
73 struct nilfs_bh_assoc { <<
74 unsigned long blkoff; <<
75 struct buffer_head *bh; <<
76 }; <<
77 <<
78 /** <<
79 * struct nilfs_palloc_cache - persistent obje <<
80 * @lock: cache protecting lock <<
81 * @prev_desc: blockgroup descriptors cache <<
82 * @prev_bitmap: blockgroup bitmap cache <<
83 * @prev_entry: translation entries cache <<
84 */ <<
85 struct nilfs_palloc_cache { <<
86 spinlock_t lock; <<
87 struct nilfs_bh_assoc prev_desc; <<
88 struct nilfs_bh_assoc prev_bitmap; <<
89 struct nilfs_bh_assoc prev_entry; <<
90 }; <<
91 <<
92 void nilfs_palloc_setup_cache(struct inode *in <<
93 struct nilfs_pal <<
94 void nilfs_palloc_clear_cache(struct inode *in <<
95 void nilfs_palloc_destroy_cache(struct inode * <<
96 71
97 #endif /* _NILFS_ALLOC_H */ 72 #endif /* _NILFS_ALLOC_H */
98 73
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