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()
78 static int nilfs_prepare_chunk(struct page *page, unsigned from, unsigned to)  in nilfs_prepare_chunk()  argument
80 	loff_t pos = page_offset(page) + from;  in nilfs_prepare_chunk()
81 	return __block_write_begin(page, pos, to - from, nilfs_get_block);  in nilfs_prepare_chunk()
84 static void nilfs_commit_chunk(struct page *page,  in nilfs_commit_chunk()  argument
89 	loff_t pos = page_offset(page) + from;  in nilfs_commit_chunk()
94 	nr_dirty = nilfs_page_count_clean_buffers(page, from, to);  in nilfs_commit_chunk()
95 	copied = block_write_end(NULL, mapping, pos, len, len, page, NULL);  in nilfs_commit_chunk()
102 	unlock_page(page);  in nilfs_commit_chunk()
105 static void nilfs_check_page(struct page *page)  in nilfs_check_page()  argument
107 	struct inode *dir = page->mapping->host;  in nilfs_check_page()
110 	char *kaddr = page_address(page);  in nilfs_check_page()
116 	if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {  in nilfs_check_page()
139 	SetPageChecked(page);  in nilfs_check_page()
164 		    dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT)+offs,  in nilfs_check_page()
173 		    dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,  in nilfs_check_page()
176 	SetPageChecked(page);  in nilfs_check_page()
177 	SetPageError(page);  in nilfs_check_page()
180 static struct page *nilfs_get_page(struct inode *dir, unsigned long n)  in nilfs_get_page()
183 	struct page *page = read_mapping_page(mapping, n, NULL);  in nilfs_get_page()  local
185 	if (!IS_ERR(page)) {  in nilfs_get_page()
186 		kmap(page);  in nilfs_get_page()
187 		if (!PageChecked(page))  in nilfs_get_page()
188 			nilfs_check_page(page);  in nilfs_get_page()
189 		if (PageError(page))  in nilfs_get_page()
192 	return page;  in nilfs_get_page()
195 	nilfs_put_page(page);  in nilfs_get_page()
270 		struct page *page = nilfs_get_page(inode, n);  in nilfs_readdir()  local
272 		if (IS_ERR(page)) {  in nilfs_readdir()
278 		kaddr = page_address(page);  in nilfs_readdir()
286 				nilfs_put_page(page);  in nilfs_readdir()
299 					nilfs_put_page(page);  in nilfs_readdir()
305 		nilfs_put_page(page);  in nilfs_readdir()
320 		 struct page **res_page)  in nilfs_find_entry()
327 	struct page *page = NULL;  in nilfs_find_entry()  local
343 		page = nilfs_get_page(dir, n);  in nilfs_find_entry()
344 		if (!IS_ERR(page)) {  in nilfs_find_entry()
345 			kaddr = page_address(page);  in nilfs_find_entry()
352 					nilfs_put_page(page);  in nilfs_find_entry()
359 			nilfs_put_page(page);  in nilfs_find_entry()
376 	*res_page = page;  in nilfs_find_entry()
381 struct nilfs_dir_entry *nilfs_dotdot(struct inode *dir, struct page **p)  in nilfs_dotdot()
383 	struct page *page = nilfs_get_page(dir, 0);  in nilfs_dotdot()  local
386 	if (!IS_ERR(page)) {  in nilfs_dotdot()
388 			(struct nilfs_dir_entry *)page_address(page));  in nilfs_dotdot()
389 		*p = page;  in nilfs_dotdot()
398 	struct page *page;  in nilfs_inode_by_name()  local
400 	de = nilfs_find_entry(dir, qstr, &page);  in nilfs_inode_by_name()
403 		kunmap(page);  in nilfs_inode_by_name()
404 		page_cache_release(page);  in nilfs_inode_by_name()
411 		    struct page *page, struct inode *inode)  in nilfs_set_link()  argument
413 	unsigned from = (char *) de - (char *) page_address(page);  in nilfs_set_link()
415 	struct address_space *mapping = page->mapping;  in nilfs_set_link()
418 	lock_page(page);  in nilfs_set_link()
419 	err = nilfs_prepare_chunk(page, from, to);  in nilfs_set_link()
423 	nilfs_commit_chunk(page, mapping, from, to);  in nilfs_set_link()
424 	nilfs_put_page(page);  in nilfs_set_link()
439 	struct page *page = NULL;  in nilfs_add_link()  local
455 		page = nilfs_get_page(dir, n);  in nilfs_add_link()
456 		err = PTR_ERR(page);  in nilfs_add_link()
457 		if (IS_ERR(page))  in nilfs_add_link()
459 		lock_page(page);  in nilfs_add_link()
460 		kaddr = page_address(page);  in nilfs_add_link()
490 		unlock_page(page);  in nilfs_add_link()
491 		nilfs_put_page(page);  in nilfs_add_link()
497 	from = (char *)de - (char *)page_address(page);  in nilfs_add_link()
499 	err = nilfs_prepare_chunk(page, from, to);  in nilfs_add_link()
514 	nilfs_commit_chunk(page, page->mapping, from, to);  in nilfs_add_link()
519 	nilfs_put_page(page);  in nilfs_add_link()
523 	unlock_page(page);  in nilfs_add_link()
531 int nilfs_delete_entry(struct nilfs_dir_entry *dir, struct page *page)  in nilfs_delete_entry()  argument
533 	struct address_space *mapping = page->mapping;  in nilfs_delete_entry()
535 	char *kaddr = page_address(page);  in nilfs_delete_entry()
554 		from = (char *)pde - (char *)page_address(page);  in nilfs_delete_entry()
555 	lock_page(page);  in nilfs_delete_entry()
556 	err = nilfs_prepare_chunk(page, from, to);  in nilfs_delete_entry()
561 	nilfs_commit_chunk(page, mapping, from, to);  in nilfs_delete_entry()
564 	nilfs_put_page(page);  in nilfs_delete_entry()
574 	struct page *page = grab_cache_page(mapping, 0);  in nilfs_make_empty()  local
580 	if (!page)  in nilfs_make_empty()
583 	err = nilfs_prepare_chunk(page, 0, chunk_size);  in nilfs_make_empty()
585 		unlock_page(page);  in nilfs_make_empty()
588 	kaddr = kmap_atomic(page);  in nilfs_make_empty()
604 	nilfs_commit_chunk(page, mapping, 0, chunk_size);  in nilfs_make_empty()
606 	page_cache_release(page);  in nilfs_make_empty()
615 	struct page *page = NULL;  in nilfs_empty_dir()  local
622 		page = nilfs_get_page(inode, i);  in nilfs_empty_dir()
623 		if (IS_ERR(page))  in nilfs_empty_dir()
626 		kaddr = page_address(page);  in nilfs_empty_dir()
652 		nilfs_put_page(page);  in nilfs_empty_dir()
657 	nilfs_put_page(page);  in nilfs_empty_dir()