41 static inline void exofs_put_page(struct page *page)  in exofs_put_page()  argument
43 	kunmap(page);  in exofs_put_page()
44 	page_cache_release(page);  in exofs_put_page()
63 static int exofs_commit_chunk(struct page *page, loff_t pos, unsigned len)  in exofs_commit_chunk()  argument
65 	struct address_space *mapping = page->mapping;  in exofs_commit_chunk()
71 	if (!PageUptodate(page))  in exofs_commit_chunk()
72 		SetPageUptodate(page);  in exofs_commit_chunk()
78 	set_page_dirty(page);  in exofs_commit_chunk()
81 		err = write_one_page(page, 1);  in exofs_commit_chunk()
83 		unlock_page(page);  in exofs_commit_chunk()
88 static void exofs_check_page(struct page *page)  in exofs_check_page()  argument
90 	struct inode *dir = page->mapping->host;  in exofs_check_page()
92 	char *kaddr = page_address(page);  in exofs_check_page()
99 	if ((dir->i_size >> PAGE_CACHE_SHIFT) == page->index) {  in exofs_check_page()
122 	SetPageChecked(page);  in exofs_check_page()
147 		dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT)+offs,  in exofs_check_page()
156 		dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,  in exofs_check_page()
159 	SetPageChecked(page);  in exofs_check_page()
160 	SetPageError(page);  in exofs_check_page()
163 static struct page *exofs_get_page(struct inode *dir, unsigned long n)  in exofs_get_page()
166 	struct page *page = read_mapping_page(mapping, n, NULL);  in exofs_get_page()  local
168 	if (!IS_ERR(page)) {  in exofs_get_page()
169 		kmap(page);  in exofs_get_page()
170 		if (!PageChecked(page))  in exofs_get_page()
171 			exofs_check_page(page);  in exofs_get_page()
172 		if (PageError(page))  in exofs_get_page()
175 	return page;  in exofs_get_page()
178 	exofs_put_page(page);  in exofs_get_page()
258 		struct page *page = exofs_get_page(inode, n);  in exofs_readdir()  local
260 		if (IS_ERR(page)) {  in exofs_readdir()
264 			return PTR_ERR(page);  in exofs_readdir()
266 		kaddr = page_address(page);  in exofs_readdir()
284 				exofs_put_page(page);  in exofs_readdir()
298 					exofs_put_page(page);  in exofs_readdir()
304 		exofs_put_page(page);  in exofs_readdir()
310 			struct dentry *dentry, struct page **res_page)  in exofs_find_entry()
317 	struct page *page = NULL;  in exofs_find_entry()  local
332 		page = exofs_get_page(dir, n);  in exofs_find_entry()
333 		if (!IS_ERR(page)) {  in exofs_find_entry()
334 			kaddr = page_address(page);  in exofs_find_entry()
342 					exofs_put_page(page);  in exofs_find_entry()
349 			exofs_put_page(page);  in exofs_find_entry()
358 	*res_page = page;  in exofs_find_entry()
363 struct exofs_dir_entry *exofs_dotdot(struct inode *dir, struct page **p)  in exofs_dotdot()
365 	struct page *page = exofs_get_page(dir, 0);  in exofs_dotdot()  local
368 	if (!IS_ERR(page)) {  in exofs_dotdot()
370 				(struct exofs_dir_entry *)page_address(page));  in exofs_dotdot()
371 		*p = page;  in exofs_dotdot()
378 	struct page *page;  in exofs_parent_ino()  local
382 	de = exofs_dotdot(d_inode(child), &page);  in exofs_parent_ino()
387 	exofs_put_page(page);  in exofs_parent_ino()
395 	struct page *page;  in exofs_inode_by_name()  local
397 	de = exofs_find_entry(dir, dentry, &page);  in exofs_inode_by_name()
400 		exofs_put_page(page);  in exofs_inode_by_name()
406 			struct page *page, struct inode *inode)  in exofs_set_link()  argument
408 	loff_t pos = page_offset(page) +  in exofs_set_link()
409 			(char *) de - (char *) page_address(page);  in exofs_set_link()
413 	lock_page(page);  in exofs_set_link()
414 	err = exofs_write_begin(NULL, page->mapping, pos, len,  in exofs_set_link()
415 				AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);  in exofs_set_link()
423 		err = exofs_commit_chunk(page, pos, len);  in exofs_set_link()
424 	exofs_put_page(page);  in exofs_set_link()
438 	struct page *page = NULL;  in exofs_add_link()  local
450 		page = exofs_get_page(dir, n);  in exofs_add_link()
451 		err = PTR_ERR(page);  in exofs_add_link()
452 		if (IS_ERR(page))  in exofs_add_link()
454 		lock_page(page);  in exofs_add_link()
455 		kaddr = page_address(page);  in exofs_add_link()
485 		unlock_page(page);  in exofs_add_link()
486 		exofs_put_page(page);  in exofs_add_link()
494 	pos = page_offset(page) +  in exofs_add_link()
495 		(char *)de - (char *)page_address(page);  in exofs_add_link()
496 	err = exofs_write_begin(NULL, page->mapping, pos, rec_len, 0,  in exofs_add_link()
497 							&page, NULL);  in exofs_add_link()
511 	err = exofs_commit_chunk(page, pos, rec_len);  in exofs_add_link()
517 	exofs_put_page(page);  in exofs_add_link()
521 	unlock_page(page);  in exofs_add_link()
525 int exofs_delete_entry(struct exofs_dir_entry *dir, struct page *page)  in exofs_delete_entry()  argument
527 	struct address_space *mapping = page->mapping;  in exofs_delete_entry()
530 	char *kaddr = page_address(page);  in exofs_delete_entry()
550 		from = (char *)pde - (char *)page_address(page);  in exofs_delete_entry()
551 	pos = page_offset(page) + from;  in exofs_delete_entry()
552 	lock_page(page);  in exofs_delete_entry()
553 	err = exofs_write_begin(NULL, page->mapping, pos, to - from, 0,  in exofs_delete_entry()
554 							&page, NULL);  in exofs_delete_entry()
562 		err = exofs_commit_chunk(page, pos, to - from);  in exofs_delete_entry()
567 	exofs_put_page(page);  in exofs_delete_entry()
578 	struct page *page = grab_cache_page(mapping, 0);  in exofs_make_empty()  local
584 	if (!page)  in exofs_make_empty()
587 	err = exofs_write_begin(NULL, page->mapping, 0, chunk_size, 0,  in exofs_make_empty()
588 							&page, NULL);  in exofs_make_empty()
590 		unlock_page(page);  in exofs_make_empty()
594 	kaddr = kmap_atomic(page);  in exofs_make_empty()
609 	err = exofs_commit_chunk(page, 0, chunk_size);  in exofs_make_empty()
611 	page_cache_release(page);  in exofs_make_empty()
617 	struct page *page = NULL;  in exofs_empty_dir()  local
623 		page = exofs_get_page(inode, i);  in exofs_empty_dir()
625 		if (IS_ERR(page))  in exofs_empty_dir()
628 		kaddr = page_address(page);  in exofs_empty_dir()
654 		exofs_put_page(page);  in exofs_empty_dir()
659 	exofs_put_page(page);  in exofs_empty_dir()