1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * Buffer/page management specific to NILFS
4 *
5 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
6 *
7 * Written by Ryusuke Konishi and Seiji Kihara.
8 */
9
10 #ifndef _NILFS_PAGE_H
11 #define _NILFS_PAGE_H
12
13 #include <linux/buffer_head.h>
14 #include "nilfs.h"
15
16 /*
17 * Extended buffer state bits
18 */
19 enum {
20 BH_NILFS_Allocated = BH_PrivateStart,
21 BH_NILFS_Node,
22 BH_NILFS_Volatile,
23 BH_NILFS_Checked,
24 BH_NILFS_Redirected,
25 };
26
27 BUFFER_FNS(NILFS_Node, nilfs_node) /* nilfs node buffers */
28 BUFFER_FNS(NILFS_Volatile, nilfs_volatile)
29 BUFFER_FNS(NILFS_Checked, nilfs_checked) /* buffer is verified */
30 BUFFER_FNS(NILFS_Redirected, nilfs_redirected) /* redirected to a copy */
31
32
33 void __nilfs_clear_folio_dirty(struct folio *);
34
35 struct buffer_head *nilfs_grab_buffer(struct inode *, struct address_space *,
36 unsigned long, unsigned long);
37 void nilfs_forget_buffer(struct buffer_head *);
38 void nilfs_copy_buffer(struct buffer_head *, struct buffer_head *);
39 bool nilfs_folio_buffers_clean(struct folio *);
40 void nilfs_folio_bug(struct folio *);
41
42 int nilfs_copy_dirty_pages(struct address_space *, struct address_space *);
43 void nilfs_copy_back_pages(struct address_space *, struct address_space *);
44 void nilfs_clear_folio_dirty(struct folio *, bool);
45 void nilfs_clear_dirty_pages(struct address_space *, bool);
46 unsigned int nilfs_page_count_clean_buffers(struct page *, unsigned int,
47 unsigned int);
48 unsigned long nilfs_find_uncommitted_extent(struct inode *inode,
49 sector_t start_blk,
50 sector_t *blkoff);
51
52 #define NILFS_FOLIO_BUG(folio, m, a...) \
53 do { nilfs_folio_bug(folio); BUG(); } while (0)
54
55 #endif /* _NILFS_PAGE_H */
56
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