67 static inline void ext2_put_page(struct page *page)  in ext2_put_page()  argument
69 	kunmap(page);  in ext2_put_page()
70 	page_cache_release(page);  in ext2_put_page()
93 static int ext2_commit_chunk(struct page *page, loff_t pos, unsigned len)  in ext2_commit_chunk()  argument
95 	struct address_space *mapping = page->mapping;  in ext2_commit_chunk()
100 	block_write_end(NULL, mapping, pos, len, len, page, NULL);  in ext2_commit_chunk()
108 		err = write_one_page(page, 1);  in ext2_commit_chunk()
112 		unlock_page(page);  in ext2_commit_chunk()
118 static void ext2_check_page(struct page *page, int quiet)  in ext2_check_page()  argument
120 	struct inode *dir = page->mapping->host;  in ext2_check_page()
123 	char *kaddr = page_address(page);  in ext2_check_page()
130 	if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {  in ext2_check_page()
155 	SetPageChecked(page);  in ext2_check_page()
184 			dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT)+offs,  in ext2_check_page()
194 			dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,  in ext2_check_page()
198 	SetPageChecked(page);  in ext2_check_page()
199 	SetPageError(page);  in ext2_check_page()
202 static struct page * ext2_get_page(struct inode *dir, unsigned long n,  in ext2_get_page()
206 	struct page *page = read_mapping_page(mapping, n, NULL);  in ext2_get_page()  local
207 	if (!IS_ERR(page)) {  in ext2_get_page()
208 		kmap(page);  in ext2_get_page()
209 		if (!PageChecked(page))  in ext2_get_page()
210 			ext2_check_page(page, quiet);  in ext2_get_page()
211 		if (PageError(page))  in ext2_get_page()
214 	return page;  in ext2_get_page()
217 	ext2_put_page(page);  in ext2_get_page()
311 		struct page *page = ext2_get_page(inode, n, 0);  in ext2_readdir()  local
313 		if (IS_ERR(page)) {  in ext2_readdir()
318 			return PTR_ERR(page);  in ext2_readdir()
320 		kaddr = page_address(page);  in ext2_readdir()
335 				ext2_put_page(page);  in ext2_readdir()
347 					ext2_put_page(page);  in ext2_readdir()
353 		ext2_put_page(page);  in ext2_readdir()
367 			struct qstr *child, struct page ** res_page)  in ext2_find_entry()
374 	struct page *page = NULL;  in ext2_find_entry()  local
391 		page = ext2_get_page(dir, n, dir_has_error);  in ext2_find_entry()
392 		if (!IS_ERR(page)) {  in ext2_find_entry()
393 			kaddr = page_address(page);  in ext2_find_entry()
400 					ext2_put_page(page);  in ext2_find_entry()
407 			ext2_put_page(page);  in ext2_find_entry()
426 	*res_page = page;  in ext2_find_entry()
431 struct ext2_dir_entry_2 * ext2_dotdot (struct inode *dir, struct page **p)  in ext2_dotdot()
433 	struct page *page = ext2_get_page(dir, 0, 0);  in ext2_dotdot()  local
436 	if (!IS_ERR(page)) {  in ext2_dotdot()
437 		de = ext2_next_entry((ext2_dirent *) page_address(page));  in ext2_dotdot()
438 		*p = page;  in ext2_dotdot()
447 	struct page *page;  in ext2_inode_by_name()  local
449 	de = ext2_find_entry (dir, child, &page);  in ext2_inode_by_name()
452 		ext2_put_page(page);  in ext2_inode_by_name()
457 static int ext2_prepare_chunk(struct page *page, loff_t pos, unsigned len)  in ext2_prepare_chunk()  argument
459 	return __block_write_begin(page, pos, len, ext2_get_block);  in ext2_prepare_chunk()
464 		   struct page *page, struct inode *inode, int update_times)  in ext2_set_link()  argument
466 	loff_t pos = page_offset(page) +  in ext2_set_link()
467 			(char *) de - (char *) page_address(page);  in ext2_set_link()
471 	lock_page(page);  in ext2_set_link()
472 	err = ext2_prepare_chunk(page, pos, len);  in ext2_set_link()
476 	err = ext2_commit_chunk(page, pos, len);  in ext2_set_link()
477 	ext2_put_page(page);  in ext2_set_link()
495 	struct page *page = NULL;  in ext2_add_link()  local
511 		page = ext2_get_page(dir, n, 0);  in ext2_add_link()
512 		err = PTR_ERR(page);  in ext2_add_link()
513 		if (IS_ERR(page))  in ext2_add_link()
515 		lock_page(page);  in ext2_add_link()
516 		kaddr = page_address(page);  in ext2_add_link()
546 		unlock_page(page);  in ext2_add_link()
547 		ext2_put_page(page);  in ext2_add_link()
553 	pos = page_offset(page) +  in ext2_add_link()
554 		(char*)de - (char*)page_address(page);  in ext2_add_link()
555 	err = ext2_prepare_chunk(page, pos, rec_len);  in ext2_add_link()
568 	err = ext2_commit_chunk(page, pos, rec_len);  in ext2_add_link()
574 	ext2_put_page(page);  in ext2_add_link()
578 	unlock_page(page);  in ext2_add_link()
586 int ext2_delete_entry (struct ext2_dir_entry_2 * dir, struct page * page )  in ext2_delete_entry()  argument
588 	struct inode *inode = page->mapping->host;  in ext2_delete_entry()
589 	char *kaddr = page_address(page);  in ext2_delete_entry()
609 		from = (char*)pde - (char*)page_address(page);  in ext2_delete_entry()
610 	pos = page_offset(page) + from;  in ext2_delete_entry()
611 	lock_page(page);  in ext2_delete_entry()
612 	err = ext2_prepare_chunk(page, pos, to - from);  in ext2_delete_entry()
617 	err = ext2_commit_chunk(page, pos, to - from);  in ext2_delete_entry()
622 	ext2_put_page(page);  in ext2_delete_entry()
631 	struct page *page = grab_cache_page(inode->i_mapping, 0);  in ext2_make_empty()  local
637 	if (!page)  in ext2_make_empty()
640 	err = ext2_prepare_chunk(page, 0, chunk_size);  in ext2_make_empty()
642 		unlock_page(page);  in ext2_make_empty()
645 	kaddr = kmap_atomic(page);  in ext2_make_empty()
661 	err = ext2_commit_chunk(page, 0, chunk_size);  in ext2_make_empty()
663 	page_cache_release(page);  in ext2_make_empty()
672 	struct page *page = NULL;  in ext2_empty_dir()  local
679 		page = ext2_get_page(inode, i, dir_has_error);  in ext2_empty_dir()
681 		if (IS_ERR(page)) {  in ext2_empty_dir()
686 		kaddr = page_address(page);  in ext2_empty_dir()
712 		ext2_put_page(page);  in ext2_empty_dir()
717 	ext2_put_page(page);  in ext2_empty_dir()