cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

page.h (1904B)

      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 */
     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
     33int __nilfs_clear_page_dirty(struct page *);
     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 *);
     39int nilfs_page_buffers_clean(struct page *);
     40void nilfs_page_bug(struct page *);
     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_dirty_page(struct page *, bool);
     45void nilfs_clear_dirty_pages(struct address_space *, bool);
     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_PAGE_BUG(page, m, a...) \
     53	do { nilfs_page_bug(page); BUG(); } while (0)
     54
     55static inline struct buffer_head *
     56nilfs_page_get_nth_block(struct page *page, unsigned int count)
     57{
     58	struct buffer_head *bh = page_buffers(page);
     59
     60	while (count-- > 0)
     61		bh = bh->b_this_page;
     62	get_bh(bh);
     63	return bh;
     64}
     65
     66#endif /* _NILFS_PAGE_H */