From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- fs/nilfs2/page.h | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 fs/nilfs2/page.h (limited to 'fs/nilfs2/page.h') diff --git a/fs/nilfs2/page.h b/fs/nilfs2/page.h new file mode 100644 index 000000000..62b9bb469 --- /dev/null +++ b/fs/nilfs2/page.h @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * page.h - buffer/page management specific to NILFS + * + * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. + * + * Written by Ryusuke Konishi and Seiji Kihara. + */ + +#ifndef _NILFS_PAGE_H +#define _NILFS_PAGE_H + +#include +#include "nilfs.h" + +/* + * Extended buffer state bits + */ +enum { + BH_NILFS_Allocated = BH_PrivateStart, + BH_NILFS_Node, + BH_NILFS_Volatile, + BH_NILFS_Checked, + BH_NILFS_Redirected, +}; + +BUFFER_FNS(NILFS_Node, nilfs_node) /* nilfs node buffers */ +BUFFER_FNS(NILFS_Volatile, nilfs_volatile) +BUFFER_FNS(NILFS_Checked, nilfs_checked) /* buffer is verified */ +BUFFER_FNS(NILFS_Redirected, nilfs_redirected) /* redirected to a copy */ + + +int __nilfs_clear_page_dirty(struct page *); + +struct buffer_head *nilfs_grab_buffer(struct inode *, struct address_space *, + unsigned long, unsigned long); +void nilfs_forget_buffer(struct buffer_head *); +void nilfs_copy_buffer(struct buffer_head *, struct buffer_head *); +int nilfs_page_buffers_clean(struct page *); +void nilfs_page_bug(struct page *); + +int nilfs_copy_dirty_pages(struct address_space *, struct address_space *); +void nilfs_copy_back_pages(struct address_space *, struct address_space *); +void nilfs_clear_dirty_page(struct page *, bool); +void nilfs_clear_dirty_pages(struct address_space *, bool); +void nilfs_mapping_init(struct address_space *mapping, struct inode *inode); +unsigned int nilfs_page_count_clean_buffers(struct page *, unsigned int, + unsigned int); +unsigned long nilfs_find_uncommitted_extent(struct inode *inode, + sector_t start_blk, + sector_t *blkoff); + +#define NILFS_PAGE_BUG(page, m, a...) \ + do { nilfs_page_bug(page); BUG(); } while (0) + +static inline struct buffer_head * +nilfs_page_get_nth_block(struct page *page, unsigned int count) +{ + struct buffer_head *bh = page_buffers(page); + + while (count-- > 0) + bh = bh->b_this_page; + get_bh(bh); + return bh; +} + +#endif /* _NILFS_PAGE_H */ -- cgit v1.2.3