29 static inline void dir_put_page(struct page *page)  in dir_put_page()  argument
31 	kunmap(page);  in dir_put_page()
32 	put_page(page);  in dir_put_page()
36  * Return the offset into page `page_nr' of the last valid
37  * byte in that page, plus one.
49 static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len)  in dir_commit_chunk()  argument
51 	struct address_space *mapping = page->mapping;  in dir_commit_chunk()
54 	block_write_end(NULL, mapping, pos, len, len, page, NULL);  in dir_commit_chunk()
61 		err = write_one_page(page);  in dir_commit_chunk()
63 		unlock_page(page);  in dir_commit_chunk()
67 static struct page * dir_get_page(struct inode *dir, unsigned long n)  in dir_get_page()
70 	struct page *page = read_mapping_page(mapping, n, NULL);  in dir_get_page()  local
71 	if (!IS_ERR(page))  in dir_get_page()
72 		kmap(page);  in dir_get_page()
73 	return page;  in dir_get_page()
101 		struct page *page = dir_get_page(inode, n);  in minix_readdir()  local
103 		if (IS_ERR(page))  in minix_readdir()
105 		kaddr = (char *)page_address(page);  in minix_readdir()
124 					dir_put_page(page);  in minix_readdir()
130 		dir_put_page(page);  in minix_readdir()
151 minix_dirent *minix_find_entry(struct dentry *dentry, struct page **res_page)  in minix_find_entry()
160 	struct page *page = NULL;  in minix_find_entry()  local
170 		page = dir_get_page(dir, n);  in minix_find_entry()
171 		if (IS_ERR(page))  in minix_find_entry()
174 		kaddr = (char*)page_address(page);  in minix_find_entry()
191 		dir_put_page(page);  in minix_find_entry()
196 	*res_page = page;  in minix_find_entry()
207 	struct page *page = NULL;  in minix_add_link()  local
220 	 * This code plays outside i_size, so it locks the page  in minix_add_link()
226 		page = dir_get_page(dir, n);  in minix_add_link()
227 		err = PTR_ERR(page);  in minix_add_link()
228 		if (IS_ERR(page))  in minix_add_link()
230 		lock_page(page);  in minix_add_link()
231 		kaddr = (char*)page_address(page);  in minix_add_link()
258 		unlock_page(page);  in minix_add_link()
259 		dir_put_page(page);  in minix_add_link()
265 	pos = page_offset(page) + p - (char *)page_address(page);  in minix_add_link()
266 	err = minix_prepare_chunk(page, pos, sbi->s_dirsize);  in minix_add_link()
277 	err = dir_commit_chunk(page, pos, sbi->s_dirsize);  in minix_add_link()
281 	dir_put_page(page);  in minix_add_link()
285 	unlock_page(page);  in minix_add_link()
289 int minix_delete_entry(struct minix_dir_entry *de, struct page *page)  in minix_delete_entry()  argument
291 	struct inode *inode = page->mapping->host;  in minix_delete_entry()
292 	char *kaddr = page_address(page);  in minix_delete_entry()
293 	loff_t pos = page_offset(page) + (char*)de - kaddr;  in minix_delete_entry()
298 	lock_page(page);  in minix_delete_entry()
299 	err = minix_prepare_chunk(page, pos, len);  in minix_delete_entry()
305 		err = dir_commit_chunk(page, pos, len);  in minix_delete_entry()
307 		unlock_page(page);  in minix_delete_entry()
309 	dir_put_page(page);  in minix_delete_entry()
317 	struct page *page = grab_cache_page(inode->i_mapping, 0);  in minix_make_empty()  local
322 	if (!page)  in minix_make_empty()
324 	err = minix_prepare_chunk(page, 0, 2 * sbi->s_dirsize);  in minix_make_empty()
326 		unlock_page(page);  in minix_make_empty()
330 	kaddr = kmap_atomic(page);  in minix_make_empty()
352 	err = dir_commit_chunk(page, 0, 2 * sbi->s_dirsize);  in minix_make_empty()
354 	put_page(page);  in minix_make_empty()
363 	struct page *page = NULL;  in minix_empty_dir()  local
372 		page = dir_get_page(inode, i);  in minix_empty_dir()
373 		if (IS_ERR(page))  in minix_empty_dir()
376 		kaddr = (char *)page_address(page);  in minix_empty_dir()
402 		dir_put_page(page);  in minix_empty_dir()
407 	dir_put_page(page);  in minix_empty_dir()
411 /* Releases the page */
412 void minix_set_link(struct minix_dir_entry *de, struct page *page,  in minix_set_link()  argument
415 	struct inode *dir = page->mapping->host;  in minix_set_link()
417 	loff_t pos = page_offset(page) +  in minix_set_link()
418 			(char *)de-(char*)page_address(page);  in minix_set_link()
421 	lock_page(page);  in minix_set_link()
423 	err = minix_prepare_chunk(page, pos, sbi->s_dirsize);  in minix_set_link()
429 		err = dir_commit_chunk(page, pos, sbi->s_dirsize);  in minix_set_link()
431 		unlock_page(page);  in minix_set_link()
433 	dir_put_page(page);  in minix_set_link()
438 struct minix_dir_entry * minix_dotdot (struct inode *dir, struct page **p)  in minix_dotdot()
440 	struct page *page = dir_get_page(dir, 0);  in minix_dotdot()  local
444 	if (!IS_ERR(page)) {  in minix_dotdot()
445 		de = minix_next_entry(page_address(page), sbi);  in minix_dotdot()
446 		*p = page;  in minix_dotdot()
453 	struct page *page;  in minix_inode_by_name()  local
454 	struct minix_dir_entry *de = minix_find_entry(dentry, &page);  in minix_inode_by_name()
458 		struct address_space *mapping = page->mapping;  in minix_inode_by_name()
466 		dir_put_page(page);  in minix_inode_by_name()