diff options
Diffstat (limited to 'fs/nilfs2/page.c')
-rw-r--r-- | fs/nilfs2/page.c | 60 |
1 files changed, 33 insertions, 27 deletions
diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c index 8de3e1e48130..a6c3c2e817f8 100644 --- a/fs/nilfs2/page.c +++ b/fs/nilfs2/page.c @@ -37,7 +37,8 @@ #define NILFS_BUFFER_INHERENT_BITS \ ((1UL << BH_Uptodate) | (1UL << BH_Mapped) | (1UL << BH_NILFS_Node) | \ - (1UL << BH_NILFS_Volatile) | (1UL << BH_NILFS_Allocated)) + (1UL << BH_NILFS_Volatile) | (1UL << BH_NILFS_Allocated) | \ + (1UL << BH_NILFS_Checked)) static struct buffer_head * __nilfs_get_page_block(struct page *page, unsigned long block, pgoff_t index, @@ -78,8 +79,8 @@ struct buffer_head *nilfs_grab_buffer(struct inode *inode, { int blkbits = inode->i_blkbits; pgoff_t index = blkoff >> (PAGE_CACHE_SHIFT - blkbits); - struct page *page, *opage; - struct buffer_head *bh, *obh; + struct page *page; + struct buffer_head *bh; page = grab_cache_page(mapping, index); if (unlikely(!page)) @@ -91,30 +92,6 @@ struct buffer_head *nilfs_grab_buffer(struct inode *inode, page_cache_release(page); return NULL; } - if (!buffer_uptodate(bh) && mapping->assoc_mapping != NULL) { - /* - * Shadow page cache uses assoc_mapping to point its original - * page cache. The following code tries the original cache - * if the given cache is a shadow and it didn't hit. - */ - opage = find_lock_page(mapping->assoc_mapping, index); - if (!opage) - return bh; - - obh = __nilfs_get_page_block(opage, blkoff, index, blkbits, - b_state); - if (buffer_uptodate(obh)) { - nilfs_copy_buffer(bh, obh); - if (buffer_dirty(obh)) { - nilfs_mark_buffer_dirty(bh); - if (!buffer_nilfs_node(bh) && NILFS_MDT(inode)) - nilfs_mdt_mark_dirty(inode); - } - } - brelse(obh); - unlock_page(opage); - page_cache_release(opage); - } return bh; } @@ -129,6 +106,8 @@ void nilfs_forget_buffer(struct buffer_head *bh) lock_buffer(bh); clear_buffer_nilfs_volatile(bh); + clear_buffer_nilfs_checked(bh); + clear_buffer_nilfs_redirected(bh); clear_buffer_dirty(bh); if (nilfs_page_buffers_clean(page)) __nilfs_clear_page_dirty(page); @@ -480,6 +459,8 @@ void nilfs_clear_dirty_pages(struct address_space *mapping) lock_buffer(bh); clear_buffer_dirty(bh); clear_buffer_nilfs_volatile(bh); + clear_buffer_nilfs_checked(bh); + clear_buffer_nilfs_redirected(bh); clear_buffer_uptodate(bh); clear_buffer_mapped(bh); unlock_buffer(bh); @@ -510,6 +491,31 @@ unsigned nilfs_page_count_clean_buffers(struct page *page, } return nc; } + +void nilfs_mapping_init_once(struct address_space *mapping) +{ + memset(mapping, 0, sizeof(*mapping)); + INIT_RADIX_TREE(&mapping->page_tree, GFP_ATOMIC); + spin_lock_init(&mapping->tree_lock); + INIT_LIST_HEAD(&mapping->private_list); + spin_lock_init(&mapping->private_lock); + + spin_lock_init(&mapping->i_mmap_lock); + INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap); + INIT_LIST_HEAD(&mapping->i_mmap_nonlinear); +} + +void nilfs_mapping_init(struct address_space *mapping, + struct backing_dev_info *bdi, + const struct address_space_operations *aops) +{ + mapping->host = NULL; + mapping->flags = 0; + mapping_set_gfp_mask(mapping, GFP_NOFS); + mapping->assoc_mapping = NULL; + mapping->backing_dev_info = bdi; + mapping->a_ops = aops; +} /* * NILFS2 needs clear_page_dirty() in the following two cases: |