58 static inline void nilfs_put_page(struct page *page)  in nilfs_put_page()  argument
60 	kunmap(page);  in nilfs_put_page()
61 	page_cache_release(page);  in nilfs_put_page()
83 static int nilfs_prepare_chunk(struct page *page, unsigned from, unsigned to)  in nilfs_prepare_chunk()  argument
85 	loff_t pos = page_offset(page) + from;  in nilfs_prepare_chunk()
86 	return __block_write_begin(page, pos, to - from, nilfs_get_block);  in nilfs_prepare_chunk()
89 static void nilfs_commit_chunk(struct page *page,  in nilfs_commit_chunk()  argument
94 	loff_t pos = page_offset(page) + from;  in nilfs_commit_chunk()
99 	nr_dirty = nilfs_page_count_clean_buffers(page, from, to);  in nilfs_commit_chunk()
100 	copied = block_write_end(NULL, mapping, pos, len, len, page, NULL);  in nilfs_commit_chunk()
107 	unlock_page(page);  in nilfs_commit_chunk()
110 static void nilfs_check_page(struct page *page)  in nilfs_check_page()  argument
112 	struct inode *dir = page->mapping->host;  in nilfs_check_page()
115 	char *kaddr = page_address(page);  in nilfs_check_page()
121 	if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {  in nilfs_check_page()
144 	SetPageChecked(page);  in nilfs_check_page()
169 		    dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT)+offs,  in nilfs_check_page()
178 		    dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,  in nilfs_check_page()
181 	SetPageChecked(page);  in nilfs_check_page()
182 	SetPageError(page);  in nilfs_check_page()
185 static struct page *nilfs_get_page(struct inode *dir, unsigned long n)  in nilfs_get_page()
188 	struct page *page = read_mapping_page(mapping, n, NULL);  in nilfs_get_page()  local
190 	if (!IS_ERR(page)) {  in nilfs_get_page()
191 		kmap(page);  in nilfs_get_page()
192 		if (!PageChecked(page))  in nilfs_get_page()
193 			nilfs_check_page(page);  in nilfs_get_page()
194 		if (PageError(page))  in nilfs_get_page()
197 	return page;  in nilfs_get_page()
200 	nilfs_put_page(page);  in nilfs_get_page()
275 		struct page *page = nilfs_get_page(inode, n);  in nilfs_readdir()  local
277 		if (IS_ERR(page)) {  in nilfs_readdir()
283 		kaddr = page_address(page);  in nilfs_readdir()
291 				nilfs_put_page(page);  in nilfs_readdir()
304 					nilfs_put_page(page);  in nilfs_readdir()
310 		nilfs_put_page(page);  in nilfs_readdir()
325 		 struct page **res_page)  in nilfs_find_entry()
332 	struct page *page = NULL;  in nilfs_find_entry()  local
348 		page = nilfs_get_page(dir, n);  in nilfs_find_entry()
349 		if (!IS_ERR(page)) {  in nilfs_find_entry()
350 			kaddr = page_address(page);  in nilfs_find_entry()
357 					nilfs_put_page(page);  in nilfs_find_entry()
364 			nilfs_put_page(page);  in nilfs_find_entry()
381 	*res_page = page;  in nilfs_find_entry()
386 struct nilfs_dir_entry *nilfs_dotdot(struct inode *dir, struct page **p)  in nilfs_dotdot()
388 	struct page *page = nilfs_get_page(dir, 0);  in nilfs_dotdot()  local
391 	if (!IS_ERR(page)) {  in nilfs_dotdot()
393 			(struct nilfs_dir_entry *)page_address(page));  in nilfs_dotdot()
394 		*p = page;  in nilfs_dotdot()
403 	struct page *page;  in nilfs_inode_by_name()  local
405 	de = nilfs_find_entry(dir, qstr, &page);  in nilfs_inode_by_name()
408 		kunmap(page);  in nilfs_inode_by_name()
409 		page_cache_release(page);  in nilfs_inode_by_name()
416 		    struct page *page, struct inode *inode)  in nilfs_set_link()  argument
418 	unsigned from = (char *) de - (char *) page_address(page);  in nilfs_set_link()
420 	struct address_space *mapping = page->mapping;  in nilfs_set_link()
423 	lock_page(page);  in nilfs_set_link()
424 	err = nilfs_prepare_chunk(page, from, to);  in nilfs_set_link()
428 	nilfs_commit_chunk(page, mapping, from, to);  in nilfs_set_link()
429 	nilfs_put_page(page);  in nilfs_set_link()
444 	struct page *page = NULL;  in nilfs_add_link()  local
460 		page = nilfs_get_page(dir, n);  in nilfs_add_link()
461 		err = PTR_ERR(page);  in nilfs_add_link()
462 		if (IS_ERR(page))  in nilfs_add_link()
464 		lock_page(page);  in nilfs_add_link()
465 		kaddr = page_address(page);  in nilfs_add_link()
495 		unlock_page(page);  in nilfs_add_link()
496 		nilfs_put_page(page);  in nilfs_add_link()
502 	from = (char *)de - (char *)page_address(page);  in nilfs_add_link()
504 	err = nilfs_prepare_chunk(page, from, to);  in nilfs_add_link()
519 	nilfs_commit_chunk(page, page->mapping, from, to);  in nilfs_add_link()
524 	nilfs_put_page(page);  in nilfs_add_link()
528 	unlock_page(page);  in nilfs_add_link()
536 int nilfs_delete_entry(struct nilfs_dir_entry *dir, struct page *page)  in nilfs_delete_entry()  argument
538 	struct address_space *mapping = page->mapping;  in nilfs_delete_entry()
540 	char *kaddr = page_address(page);  in nilfs_delete_entry()
559 		from = (char *)pde - (char *)page_address(page);  in nilfs_delete_entry()
560 	lock_page(page);  in nilfs_delete_entry()
561 	err = nilfs_prepare_chunk(page, from, to);  in nilfs_delete_entry()
566 	nilfs_commit_chunk(page, mapping, from, to);  in nilfs_delete_entry()
569 	nilfs_put_page(page);  in nilfs_delete_entry()
579 	struct page *page = grab_cache_page(mapping, 0);  in nilfs_make_empty()  local
585 	if (!page)  in nilfs_make_empty()
588 	err = nilfs_prepare_chunk(page, 0, chunk_size);  in nilfs_make_empty()
590 		unlock_page(page);  in nilfs_make_empty()
593 	kaddr = kmap_atomic(page);  in nilfs_make_empty()
609 	nilfs_commit_chunk(page, mapping, 0, chunk_size);  in nilfs_make_empty()
611 	page_cache_release(page);  in nilfs_make_empty()
620 	struct page *page = NULL;  in nilfs_empty_dir()  local
627 		page = nilfs_get_page(inode, i);  in nilfs_empty_dir()
628 		if (IS_ERR(page))  in nilfs_empty_dir()
631 		kaddr = page_address(page);  in nilfs_empty_dir()
657 		nilfs_put_page(page);  in nilfs_empty_dir()
662 	nilfs_put_page(page);  in nilfs_empty_dir()