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1/* SPDX-License-Identifier: GPL-2.0+ */2/*3 * Buffer/page management specific to NILFS4 *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_H11#define _NILFS_PAGE_H12 13#include <linux/buffer_head.h>14#include "nilfs.h"15 16/*17 * Extended buffer state bits18 */19enum {20 BH_NILFS_Allocated = BH_PrivateStart,21 BH_NILFS_Node,22 BH_NILFS_Volatile,23 BH_NILFS_Checked,24 BH_NILFS_Redirected,25};26 27BUFFER_FNS(NILFS_Node, nilfs_node) /* nilfs node buffers */28BUFFER_FNS(NILFS_Volatile, nilfs_volatile)29BUFFER_FNS(NILFS_Checked, nilfs_checked) /* buffer is verified */30BUFFER_FNS(NILFS_Redirected, nilfs_redirected) /* redirected to a copy */31 32 33void __nilfs_clear_folio_dirty(struct folio *);34 35struct buffer_head *nilfs_grab_buffer(struct inode *, struct address_space *,36 unsigned long, unsigned long);37void nilfs_forget_buffer(struct buffer_head *);38void nilfs_copy_buffer(struct buffer_head *, struct buffer_head *);39bool nilfs_folio_buffers_clean(struct folio *);40void nilfs_folio_bug(struct folio *);41 42int nilfs_copy_dirty_pages(struct address_space *, struct address_space *);43void nilfs_copy_back_pages(struct address_space *, struct address_space *);44void nilfs_clear_folio_dirty(struct folio *folio);45void nilfs_clear_dirty_pages(struct address_space *mapping);46unsigned int nilfs_page_count_clean_buffers(struct page *, unsigned int,47 unsigned int);48unsigned 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