52 static struct page *get_mapping_page(struct super_block *sb, pgoff_t index,  in get_mapping_page()
58 	struct page *page;  in get_mapping_page()  local
62 		page = read_cache_page(mapping, index, filler, sb);  in get_mapping_page()
64 		page = find_or_create_page(mapping, index, GFP_NOFS);  in get_mapping_page()
65 		if (page)  in get_mapping_page()
66 			unlock_page(page);  in get_mapping_page()
68 	return page;  in get_mapping_page()
75 	struct page *page;  in __logfs_buf_write()  local
84 		page = get_mapping_page(area->a_sb, index, use_filler);  in __logfs_buf_write()
85 		if (IS_ERR(page))  in __logfs_buf_write()
86 			return PTR_ERR(page);  in __logfs_buf_write()
87 		BUG_ON(!page); /* FIXME: reserve a pool */  in __logfs_buf_write()
88 		SetPageUptodate(page);  in __logfs_buf_write()
89 		memcpy(page_address(page) + offset, buf, copylen);  in __logfs_buf_write()
91 		if (!PagePrivate(page)) {  in __logfs_buf_write()
92 			SetPagePrivate(page);  in __logfs_buf_write()
93 			page_cache_get(page);  in __logfs_buf_write()
95 		page_cache_release(page);  in __logfs_buf_write()
108 	struct page *page;  in pad_partial_page()  local
115 		page = get_mapping_page(sb, index, 0);  in pad_partial_page()
116 		BUG_ON(!page); /* FIXME: reserve a pool */  in pad_partial_page()
117 		memset(page_address(page) + offset, 0xff, len);  in pad_partial_page()
118 		if (!PagePrivate(page)) {  in pad_partial_page()
119 			SetPagePrivate(page);  in pad_partial_page()
120 			page_cache_get(page);  in pad_partial_page()
122 		page_cache_release(page);  in pad_partial_page()
134 	struct page *page;  in pad_full_pages()  local
137 		page = get_mapping_page(sb, index, 0);  in pad_full_pages()
138 		BUG_ON(!page); /* FIXME: reserve a pool */  in pad_full_pages()
139 		SetPageUptodate(page);  in pad_full_pages()
140 		memset(page_address(page), 0xff, PAGE_CACHE_SIZE);  in pad_full_pages()
141 		if (!PagePrivate(page)) {  in pad_full_pages()
142 			SetPagePrivate(page);  in pad_full_pages()
143 			page_cache_get(page);  in pad_full_pages()
145 		page_cache_release(page);  in pad_full_pages()
363 int logfs_segment_write(struct inode *inode, struct page *page,  in logfs_segment_write()  argument
382 	buf = kmap(page);  in logfs_segment_write()
389 	kunmap(page);  in logfs_segment_write()
403 	struct page *page;  in wbuf_read()  local
410 		page = get_mapping_page(sb, index, 1);  in wbuf_read()
411 		if (IS_ERR(page))  in wbuf_read()
412 			return PTR_ERR(page);  in wbuf_read()
413 		memcpy(buf, page_address(page) + offset, copylen);  in wbuf_read()
414 		page_cache_release(page);  in wbuf_read()
475 static void move_btree_to_page(struct inode *inode, struct page *page,  in move_btree_to_page()  argument
487 	block = btree_remove128(head, inode->i_ino, page->index);  in move_btree_to_page()
498 	block->page = page;  in move_btree_to_page()
500 	if (!PagePrivate(page)) {  in move_btree_to_page()
501 		SetPagePrivate(page);  in move_btree_to_page()
502 		page_cache_get(page);  in move_btree_to_page()
503 		set_page_private(page, (unsigned long) block);  in move_btree_to_page()
506 	initialize_block_counters(page, block, data, 0);  in move_btree_to_page()
520 void move_page_to_btree(struct page *page)  in move_page_to_btree()  argument
522 	struct logfs_block *block = logfs_block(page);  in move_page_to_btree()
547 		child = kmap_atomic(page);  in move_page_to_btree()
553 	block->page = NULL;  in move_page_to_btree()
555 	if (PagePrivate(page)) {  in move_page_to_btree()
556 		ClearPagePrivate(page);  in move_page_to_btree()
557 		page_cache_release(page);  in move_page_to_btree()
558 		set_page_private(page, 0);  in move_page_to_btree()
564 	ClearPageUptodate(page);  in move_page_to_btree()
656 int logfs_segment_read(struct inode *inode, struct page *page,  in logfs_segment_read()  argument
662 	if (PageUptodate(page))  in logfs_segment_read()
667 	buf = kmap(page);  in logfs_segment_read()
670 		move_btree_to_page(inode, page, buf);  in logfs_segment_read()
671 		SetPageUptodate(page);  in logfs_segment_read()
673 	kunmap(page);  in logfs_segment_read()
715 	struct page *page;  in freeseg()  local
721 		page = find_get_page(mapping, ofs >> PAGE_SHIFT);  in freeseg()
722 		if (!page)  in freeseg()
724 		if (PagePrivate(page)) {  in freeseg()
725 			ClearPagePrivate(page);  in freeseg()
726 			page_cache_release(page);  in freeseg()
728 		page_cache_release(page);  in freeseg()
888 static void map_invalidatepage(struct page *page, unsigned int o,  in map_invalidatepage()  argument
894 static int map_releasepage(struct page *page, gfp_t g)  in map_releasepage()  argument