projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 0bd49f94 RK |
1 | /* |
| 2 | * page.h - buffer/page management specific to NILFS | |
| 3 | * | |
| 4 | * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License as published by | |
| 8 | * the Free Software Foundation; either version 2 of the License, or | |
| 9 | * (at your option) any later version. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License | |
| 17 | * along with this program; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
| 19 | * | |
| 20 | * Written by Ryusuke Konishi <ryusuke@osrg.net>, | |
| 21 | * Seiji Kihara <kihara@osrg.net>. | |
| 22 | */ | |
| 23 | ||
| 24 | #ifndef _NILFS_PAGE_H | |
| 25 | #define _NILFS_PAGE_H | |
| 26 | ||
| 27 | #include <linux/buffer_head.h> | |
| 28 | #include "nilfs.h" | |
| 29 | ||
| 30 | /* | |
| 31 | * Extended buffer state bits | |
| 32 | */ | |
| 33 | enum { | |
| 34 | BH_NILFS_Allocated = BH_PrivateStart, | |
| 35 | BH_NILFS_Node, | |
| 36 | BH_NILFS_Volatile, | |
| 4e13e66b | 37 | BH_NILFS_Checked, |
| b1f6a4f2 | 38 | BH_NILFS_Redirected, |
| 0bd49f94 RK |
39 | }; |
| 40 | ||
| 41 | BUFFER_FNS(NILFS_Allocated, nilfs_allocated) /* nilfs private buffers */ | |
| 42 | BUFFER_FNS(NILFS_Node, nilfs_node) /* nilfs node buffers */ | |
| 43 | BUFFER_FNS(NILFS_Volatile, nilfs_volatile) | |
| 4e13e66b | 44 | BUFFER_FNS(NILFS_Checked, nilfs_checked) /* buffer is verified */ |
| b1f6a4f2 | 45 | BUFFER_FNS(NILFS_Redirected, nilfs_redirected) /* redirected to a copy */ |
| 0bd49f94 RK |
46 | |
| 47 | ||
| 48 | void nilfs_mark_buffer_dirty(struct buffer_head *bh); | |
| 49 | int __nilfs_clear_page_dirty(struct page *); | |
| 50 | ||
| 51 | struct buffer_head *nilfs_grab_buffer(struct inode *, struct address_space *, | |
| 52 | unsigned long, unsigned long); | |
| 53 | void nilfs_forget_buffer(struct buffer_head *); | |
| 54 | void nilfs_copy_buffer(struct buffer_head *, struct buffer_head *); | |
| 55 | int nilfs_page_buffers_clean(struct page *); | |
| 56 | void nilfs_page_bug(struct page *); | |
| 57 | struct page *nilfs_alloc_private_page(struct block_device *, int, | |
| 58 | unsigned long); | |
| 59 | void nilfs_free_private_page(struct page *); | |
| 60 | ||
| 61 | int nilfs_copy_dirty_pages(struct address_space *, struct address_space *); | |
| 62 | void nilfs_copy_back_pages(struct address_space *, struct address_space *); | |
| 63 | void nilfs_clear_dirty_pages(struct address_space *); | |
| ebdfed4d RK |
64 | void nilfs_mapping_init(struct address_space *mapping, |
| 65 | struct backing_dev_info *bdi, | |
| 66 | const struct address_space_operations *aops); | |
| 0bd49f94 | 67 | unsigned nilfs_page_count_clean_buffers(struct page *, unsigned, unsigned); |
| 622daaff RK |
68 | unsigned long nilfs_find_uncommitted_extent(struct inode *inode, |
| 69 | sector_t start_blk, | |
| 70 | sector_t *blkoff); | |
| 0bd49f94 RK |
71 | |
| 72 | #define NILFS_PAGE_BUG(page, m, a...) \ | |
| 73 | do { nilfs_page_bug(page); BUG(); } while (0) | |
| 74 | ||
| 75 | static inline struct buffer_head * | |
| 76 | nilfs_page_get_nth_block(struct page *page, unsigned int count) | |
| 77 | { | |
| 78 | struct buffer_head *bh = page_buffers(page); | |
| 79 | ||
| 80 | while (count-- > 0) | |
| 81 | bh = bh->b_this_page; | |
| 82 | get_bh(bh); | |
| 83 | return bh; | |
| 84 | } | |
| 85 | ||
| 86 | #endif /* _NILFS_PAGE_H */ |