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