39 static inline void ext2_put_page(struct page *page)  in ext2_put_page()  argument
41 	kunmap(page);  in ext2_put_page()
42 	page_cache_release(page);  in ext2_put_page()
50 static int ext2_commit_chunk(struct page *page, unsigned from, unsigned to)  in ext2_commit_chunk()  argument
52 	struct inode *dir = page->mapping->host;  in ext2_commit_chunk()
55 	page->mapping->a_ops->commit_write(NULL, page, from, to);  in ext2_commit_chunk()
58 		err = writeout_one_page(page);  in ext2_commit_chunk()
59 		err2 = waitfor_one_page(page);  in ext2_commit_chunk()
66 static void ext2_check_page(struct page *page, int quiet)  in ext2_check_page()  argument
68 	struct inode *dir = page->mapping->host;  in ext2_check_page()
71 	char *kaddr = page_address(page);  in ext2_check_page()
78 	if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {  in ext2_check_page()
107 	SetPageChecked(page);  in ext2_check_page()
136 			dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT)+offs,  in ext2_check_page()
146 			dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,  in ext2_check_page()
150 	SetPageChecked(page);  in ext2_check_page()
151 	SetPageError(page);  in ext2_check_page()
154 static struct page * ext2_get_page(struct inode *dir, unsigned long n,  in ext2_get_page()
158 	struct page *page = read_cache_page(mapping, n,  in ext2_get_page()  local
160 	if (!IS_ERR(page)) {  in ext2_get_page()
161 		wait_on_page(page);  in ext2_get_page()
162 		kmap(page);  in ext2_get_page()
163 		if (!Page_Uptodate(page))  in ext2_get_page()
165 		if (!PageChecked(page))  in ext2_get_page()
166 			ext2_check_page(page, quiet);  in ext2_get_page()
167 		if (PageError(page))  in ext2_get_page()
170 	return page;  in ext2_get_page()
173 	ext2_put_page(page);  in ext2_get_page()
264 		struct page *page = ext2_get_page(inode, n, 0);  in ext2_readdir()  local
266 		if (IS_ERR(page)) {  in ext2_readdir()
274 		kaddr = page_address(page);  in ext2_readdir()
294 					ext2_put_page(page);  in ext2_readdir()
300 		ext2_put_page(page);  in ext2_readdir()
318 			struct dentry *dentry, struct page ** res_page)  in ext2_find_entry()
325 	struct page *page = NULL;  in ext2_find_entry()  local
338 		page = ext2_get_page(dir, n, dir_has_error);  in ext2_find_entry()
339 		if (!IS_ERR(page)) {  in ext2_find_entry()
340 			kaddr = page_address(page);  in ext2_find_entry()
348 			ext2_put_page(page);  in ext2_find_entry()
367 	*res_page = page;  in ext2_find_entry()
372 struct ext2_dir_entry_2 * ext2_dotdot (struct inode *dir, struct page **p)  in ext2_dotdot()
374 	struct page *page = ext2_get_page(dir, 0, 0);  in ext2_dotdot()  local
377 	if (!IS_ERR(page)) {  in ext2_dotdot()
378 		de = ext2_next_entry((ext2_dirent *) page_address(page));  in ext2_dotdot()
379 		*p = page;  in ext2_dotdot()
388 	struct page *page;  in ext2_inode_by_name()  local
390 	de = ext2_find_entry (dir, dentry, &page);  in ext2_inode_by_name()
393 		kunmap(page);  in ext2_inode_by_name()
394 		page_cache_release(page);  in ext2_inode_by_name()
401 			struct page *page, struct inode *inode)  in ext2_set_link()  argument
403 	unsigned from = (char *) de - (char *) page_address(page);  in ext2_set_link()
407 	lock_page(page);  in ext2_set_link()
408 	err = page->mapping->a_ops->prepare_write(NULL, page, from, to);  in ext2_set_link()
413 	err = ext2_commit_chunk(page, from, to);  in ext2_set_link()
414 	UnlockPage(page);  in ext2_set_link()
415 	ext2_put_page(page);  in ext2_set_link()
431 	struct page *page = NULL;  in ext2_add_link()  local
441 		page = ext2_get_page(dir, n, 0);  in ext2_add_link()
442 		err = PTR_ERR(page);  in ext2_add_link()
443 		if (IS_ERR(page))  in ext2_add_link()
445 		kaddr = page_address(page);  in ext2_add_link()
460 		ext2_put_page(page);  in ext2_add_link()
466 	from = (char*)de - (char*)page_address(page);  in ext2_add_link()
468 	lock_page(page);  in ext2_add_link()
469 	err = page->mapping->a_ops->prepare_write(NULL, page, from, to);  in ext2_add_link()
482 	err = ext2_commit_chunk(page, from, to);  in ext2_add_link()
488 	UnlockPage(page);  in ext2_add_link()
490 	ext2_put_page(page);  in ext2_add_link()
499 int ext2_delete_entry (struct ext2_dir_entry_2 * dir, struct page * page )  in ext2_delete_entry()  argument
501 	struct address_space *mapping = page->mapping;  in ext2_delete_entry()
503 	char *kaddr = page_address(page);  in ext2_delete_entry()
515 		from = (char*)pde - (char*)page_address(page);  in ext2_delete_entry()
516 	lock_page(page);  in ext2_delete_entry()
517 	err = mapping->a_ops->prepare_write(NULL, page, from, to);  in ext2_delete_entry()
523 	err = ext2_commit_chunk(page, from, to);  in ext2_delete_entry()
524 	UnlockPage(page);  in ext2_delete_entry()
525 	ext2_put_page(page);  in ext2_delete_entry()
538 	struct page *page = grab_cache_page(mapping, 0);  in ext2_make_empty()  local
544 	if (!page)  in ext2_make_empty()
546 	err = mapping->a_ops->prepare_write(NULL, page, 0, chunk_size);  in ext2_make_empty()
550 	base = page_address(page);  in ext2_make_empty()
567 	err = ext2_commit_chunk(page, 0, chunk_size);  in ext2_make_empty()
569 	UnlockPage(page);  in ext2_make_empty()
570 	page_cache_release(page);  in ext2_make_empty()
579 	struct page *page = NULL;  in ext2_empty_dir()  local
586 		page = ext2_get_page(inode, i, dir_has_error);  in ext2_empty_dir()
588 		if (IS_ERR(page)) {  in ext2_empty_dir()
593 		kaddr = page_address(page);  in ext2_empty_dir()
613 		ext2_put_page(page);  in ext2_empty_dir()
618 	ext2_put_page(page);  in ext2_empty_dir()