diff options
Diffstat (limited to 'fs/nilfs2/page.h')
| -rw-r--r-- | fs/nilfs2/page.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/fs/nilfs2/page.h b/fs/nilfs2/page.h new file mode 100644 index 000000000..136cd1c14 --- /dev/null +++ b/fs/nilfs2/page.h @@ -0,0 +1,55 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * 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 <linux/buffer_head.h> +#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 */ + + +void __nilfs_clear_folio_dirty(struct folio *); + +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 *); +bool nilfs_folio_buffers_clean(struct folio *); +void nilfs_folio_bug(struct folio *); + +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_folio_dirty(struct folio *folio); +void nilfs_clear_dirty_pages(struct address_space *mapping); +unsigned int nilfs_page_count_clean_buffers(struct folio *folio, + unsigned int from, unsigned int to); +unsigned long nilfs_find_uncommitted_extent(struct inode *inode, + sector_t start_blk, + sector_t *blkoff); + +#define NILFS_FOLIO_BUG(folio, m, a...) \ + do { nilfs_folio_bug(folio); BUG(); } while (0) + +#endif /* _NILFS_PAGE_H */ |