19 	struct folio *folio;  in netfs_rreq_unlock_folios()  local
47 	xas_for_each(&xas, folio, last_page) {  in netfs_rreq_unlock_folios()
52 		if (xas_retry(&xas, folio))  in netfs_rreq_unlock_folios()
55 		pg_end = folio_pos(folio) + folio_size(folio) - 1;  in netfs_rreq_unlock_folios()
66 				folio_start_fscache(folio);  in netfs_rreq_unlock_folios()
88 			flush_dcache_folio(folio);  in netfs_rreq_unlock_folios()
89 			folio_mark_uptodate(folio);  in netfs_rreq_unlock_folios()
93 			if (folio_index(folio) == rreq->no_unlock_folio &&  in netfs_rreq_unlock_folios()
97 				folio_unlock(folio);  in netfs_rreq_unlock_folios()
224 int netfs_read_folio(struct file *file, struct folio *folio)  in netfs_read_folio()  argument
226 	struct address_space *mapping = folio_file_mapping(folio);  in netfs_read_folio()
231 	_enter("%lx", folio_index(folio));  in netfs_read_folio()
234 				   folio_file_pos(folio), folio_size(folio),  in netfs_read_folio()
254 	folio_unlock(folio);  in netfs_read_folio()
274 static bool netfs_skip_folio_read(struct folio *folio, loff_t pos, size_t len,  in netfs_skip_folio_read()  argument
277 	struct inode *inode = folio_inode(folio);  in netfs_skip_folio_read()
279 	size_t offset = offset_in_folio(folio, pos);  in netfs_skip_folio_read()
280 	size_t plen = folio_size(folio);  in netfs_skip_folio_read()
285 		zero_user_segment(&folio->page, 0, plen);  in netfs_skip_folio_read()
286 		folio_mark_uptodate(folio);  in netfs_skip_folio_read()
304 	zero_user_segments(&folio->page, 0, offset, offset + len, plen);  in netfs_skip_folio_read()
343 		      loff_t pos, unsigned int len, struct folio **_folio,  in netfs_write_begin()
347 	struct folio *folio;  in netfs_write_begin()  local
354 	folio = __filemap_get_folio(mapping, index, FGP_WRITEBEGIN,  in netfs_write_begin()
356 	if (IS_ERR(folio))  in netfs_write_begin()
357 		return PTR_ERR(folio);  in netfs_write_begin()
361 		ret = ctx->ops->check_write_begin(file, pos, len, &folio, _fsdata);  in netfs_write_begin()
366 		if (!folio)  in netfs_write_begin()
370 	if (folio_test_uptodate(folio))  in netfs_write_begin()
378 	    netfs_skip_folio_read(folio, pos, len, false)) {  in netfs_write_begin()
384 				   folio_file_pos(folio), folio_size(folio),  in netfs_write_begin()
390 	rreq->no_unlock_folio	= folio_index(folio);  in netfs_write_begin()
405 	ractl._nr_pages = folio_nr_pages(folio);  in netfs_write_begin()
409 	folio_get(folio);  in netfs_write_begin()
418 	ret = folio_wait_fscache_killable(folio);  in netfs_write_begin()
422 	*_folio = folio;  in netfs_write_begin()
429 	if (folio) {  in netfs_write_begin()
430 		folio_unlock(folio);  in netfs_write_begin()
431 		folio_put(folio);  in netfs_write_begin()