67 static inline void nilfs_put_page(struct page *page)  in nilfs_put_page()  argument
69 	kunmap(page);  in nilfs_put_page()
70 	put_page(page);  in nilfs_put_page()
87 static int nilfs_prepare_chunk(struct page *page, unsigned int from,  in nilfs_prepare_chunk()  argument
90 	loff_t pos = page_offset(page) + from;  in nilfs_prepare_chunk()
92 	return __block_write_begin(page, pos, to - from, nilfs_get_block);  in nilfs_prepare_chunk()
95 static void nilfs_commit_chunk(struct page *page,  in nilfs_commit_chunk()  argument
100 	loff_t pos = page_offset(page) + from;  in nilfs_commit_chunk()
105 	nr_dirty = nilfs_page_count_clean_buffers(page, from, to);  in nilfs_commit_chunk()
106 	copied = block_write_end(NULL, mapping, pos, len, len, page, NULL);  in nilfs_commit_chunk()
113 	unlock_page(page);  in nilfs_commit_chunk()
116 static bool nilfs_check_page(struct page *page)  in nilfs_check_page()  argument
118 	struct inode *dir = page->mapping->host;  in nilfs_check_page()
121 	char *kaddr = page_address(page);  in nilfs_check_page()
127 	if ((dir->i_size >> PAGE_SHIFT) == page->index) {  in nilfs_check_page()
150 	SetPageChecked(page);  in nilfs_check_page()
174 		    dir->i_ino, error, (page->index << PAGE_SHIFT) + offs,  in nilfs_check_page()
182 		    dir->i_ino, (page->index << PAGE_SHIFT) + offs,  in nilfs_check_page()
185 	SetPageError(page);  in nilfs_check_page()
189 static struct page *nilfs_get_page(struct inode *dir, unsigned long n)  in nilfs_get_page()
192 	struct page *page = read_mapping_page(mapping, n, NULL);  in nilfs_get_page()  local
194 	if (!IS_ERR(page)) {  in nilfs_get_page()
195 		kmap(page);  in nilfs_get_page()
196 		if (unlikely(!PageChecked(page))) {  in nilfs_get_page()
197 			if (PageError(page) || !nilfs_check_page(page))  in nilfs_get_page()
201 	return page;  in nilfs_get_page()
204 	nilfs_put_page(page);  in nilfs_get_page()
278 		struct page *page = nilfs_get_page(inode, n);  in nilfs_readdir()  local
280 		if (IS_ERR(page)) {  in nilfs_readdir()
285 		kaddr = page_address(page);  in nilfs_readdir()
292 				nilfs_put_page(page);  in nilfs_readdir()
305 					nilfs_put_page(page);  in nilfs_readdir()
311 		nilfs_put_page(page);  in nilfs_readdir()
326 		 struct page **res_page)  in nilfs_find_entry()
333 	struct page *page = NULL;  in nilfs_find_entry()  local
350 		page = nilfs_get_page(dir, n);  in nilfs_find_entry()
351 		if (!IS_ERR(page)) {  in nilfs_find_entry()
352 			kaddr = page_address(page);  in nilfs_find_entry()
359 					nilfs_put_page(page);  in nilfs_find_entry()
366 			nilfs_put_page(page);  in nilfs_find_entry()
383 	*res_page = page;  in nilfs_find_entry()
388 struct nilfs_dir_entry *nilfs_dotdot(struct inode *dir, struct page **p)  in nilfs_dotdot()
390 	struct page *page = nilfs_get_page(dir, 0);  in nilfs_dotdot()  local
393 	if (!IS_ERR(page)) {  in nilfs_dotdot()
395 			(struct nilfs_dir_entry *)page_address(page));  in nilfs_dotdot()
396 		*p = page;  in nilfs_dotdot()
405 	struct page *page;  in nilfs_inode_by_name()  local
407 	de = nilfs_find_entry(dir, qstr, &page);  in nilfs_inode_by_name()
410 		kunmap(page);  in nilfs_inode_by_name()
411 		put_page(page);  in nilfs_inode_by_name()
418 		    struct page *page, struct inode *inode)  in nilfs_set_link()  argument
420 	unsigned int from = (char *)de - (char *)page_address(page);  in nilfs_set_link()
422 	struct address_space *mapping = page->mapping;  in nilfs_set_link()
425 	lock_page(page);  in nilfs_set_link()
426 	err = nilfs_prepare_chunk(page, from, to);  in nilfs_set_link()
430 	nilfs_commit_chunk(page, mapping, from, to);  in nilfs_set_link()
431 	nilfs_put_page(page);  in nilfs_set_link()
446 	struct page *page = NULL;  in nilfs_add_link()  local
462 		page = nilfs_get_page(dir, n);  in nilfs_add_link()
463 		err = PTR_ERR(page);  in nilfs_add_link()
464 		if (IS_ERR(page))  in nilfs_add_link()
466 		lock_page(page);  in nilfs_add_link()
467 		kaddr = page_address(page);  in nilfs_add_link()
497 		unlock_page(page);  in nilfs_add_link()
498 		nilfs_put_page(page);  in nilfs_add_link()
504 	from = (char *)de - (char *)page_address(page);  in nilfs_add_link()
506 	err = nilfs_prepare_chunk(page, from, to);  in nilfs_add_link()
521 	nilfs_commit_chunk(page, page->mapping, from, to);  in nilfs_add_link()
526 	nilfs_put_page(page);  in nilfs_add_link()
530 	unlock_page(page);  in nilfs_add_link()
538 int nilfs_delete_entry(struct nilfs_dir_entry *dir, struct page *page)  in nilfs_delete_entry()  argument
540 	struct address_space *mapping = page->mapping;  in nilfs_delete_entry()
542 	char *kaddr = page_address(page);  in nilfs_delete_entry()
562 		from = (char *)pde - (char *)page_address(page);  in nilfs_delete_entry()
563 	lock_page(page);  in nilfs_delete_entry()
564 	err = nilfs_prepare_chunk(page, from, to);  in nilfs_delete_entry()
569 	nilfs_commit_chunk(page, mapping, from, to);  in nilfs_delete_entry()
572 	nilfs_put_page(page);  in nilfs_delete_entry()
582 	struct page *page = grab_cache_page(mapping, 0);  in nilfs_make_empty()  local
588 	if (!page)  in nilfs_make_empty()
591 	err = nilfs_prepare_chunk(page, 0, chunk_size);  in nilfs_make_empty()
593 		unlock_page(page);  in nilfs_make_empty()
596 	kaddr = kmap_atomic(page);  in nilfs_make_empty()
612 	nilfs_commit_chunk(page, mapping, 0, chunk_size);  in nilfs_make_empty()
614 	put_page(page);  in nilfs_make_empty()
623 	struct page *page = NULL;  in nilfs_empty_dir()  local
630 		page = nilfs_get_page(inode, i);  in nilfs_empty_dir()
631 		if (IS_ERR(page))  in nilfs_empty_dir()
634 		kaddr = page_address(page);  in nilfs_empty_dir()
660 		nilfs_put_page(page);  in nilfs_empty_dir()
665 	nilfs_put_page(page);  in nilfs_empty_dir()