33 	struct folio *folio = NULL;  in ecryptfs_writepages()  local
36 	while ((folio = writeback_iter(mapping, wbc, folio, &error))) {  in ecryptfs_writepages()
37 		error = ecryptfs_encrypt_page(folio);  in ecryptfs_writepages()
41 				folio->index);  in ecryptfs_writepages()
42 			folio_clear_uptodate(folio);  in ecryptfs_writepages()
45 		folio_unlock(folio);  in ecryptfs_writepages()
91 ecryptfs_copy_up_encrypted_with_header(struct folio *folio,  in ecryptfs_copy_up_encrypted_with_header()  argument
100 		loff_t view_extent_num = ((loff_t)folio->index  in ecryptfs_copy_up_encrypted_with_header()
110 			page_virt = kmap_local_folio(folio, 0);  in ecryptfs_copy_up_encrypted_with_header()
117 					page_virt, folio->mapping->host);  in ecryptfs_copy_up_encrypted_with_header()
124 			flush_dcache_folio(folio);  in ecryptfs_copy_up_encrypted_with_header()
137 				folio, (lower_offset >> PAGE_SHIFT),  in ecryptfs_copy_up_encrypted_with_header()
139 				crypt_stat->extent_size, folio->mapping->host);  in ecryptfs_copy_up_encrypted_with_header()
163 static int ecryptfs_read_folio(struct file *file, struct folio *folio)  in ecryptfs_read_folio()  argument
165 	struct inode *inode = folio->mapping->host;  in ecryptfs_read_folio()
171 		err = ecryptfs_read_lower_page_segment(folio, folio->index, 0,  in ecryptfs_read_folio()
172 				folio_size(folio), inode);  in ecryptfs_read_folio()
175 			err = ecryptfs_copy_up_encrypted_with_header(folio,  in ecryptfs_read_folio()
187 			err = ecryptfs_read_lower_page_segment(folio,  in ecryptfs_read_folio()
188 					folio->index, 0, folio_size(folio),  in ecryptfs_read_folio()
197 		err = ecryptfs_decrypt_page(folio);  in ecryptfs_read_folio()
206 			folio->index);  in ecryptfs_read_folio()
207 	folio_end_read(folio, err == 0);  in ecryptfs_read_folio()
214 static int fill_zeros_to_end_of_page(struct folio *folio, unsigned int to)  in fill_zeros_to_end_of_page()  argument
216 	struct inode *inode = folio->mapping->host;  in fill_zeros_to_end_of_page()
219 	if ((i_size_read(inode) / PAGE_SIZE) != folio->index)  in fill_zeros_to_end_of_page()
224 	folio_zero_segment(folio, end_byte_in_page, PAGE_SIZE);  in fill_zeros_to_end_of_page()
245 			struct folio **foliop, void **fsdata)  in ecryptfs_write_begin()
248 	struct folio *folio;  in ecryptfs_write_begin()  local
252 	folio = __filemap_get_folio(mapping, index, FGP_WRITEBEGIN,  in ecryptfs_write_begin()
254 	if (IS_ERR(folio))  in ecryptfs_write_begin()
255 		return PTR_ERR(folio);  in ecryptfs_write_begin()
256 	*foliop = folio;  in ecryptfs_write_begin()
259 	if (!folio_test_uptodate(folio)) {  in ecryptfs_write_begin()
265 				folio, index, 0, PAGE_SIZE, mapping->host);  in ecryptfs_write_begin()
270 				folio_clear_uptodate(folio);  in ecryptfs_write_begin()
273 				folio_mark_uptodate(folio);  in ecryptfs_write_begin()
277 					folio, crypt_stat);  in ecryptfs_write_begin()
285 					folio_clear_uptodate(folio);  in ecryptfs_write_begin()
288 				folio_mark_uptodate(folio);  in ecryptfs_write_begin()
291 					folio, index, 0, PAGE_SIZE,  in ecryptfs_write_begin()
297 					folio_clear_uptodate(folio);  in ecryptfs_write_begin()
300 				folio_mark_uptodate(folio);  in ecryptfs_write_begin()
305 				folio_zero_range(folio, 0, PAGE_SIZE);  in ecryptfs_write_begin()
306 				folio_mark_uptodate(folio);  in ecryptfs_write_begin()
308 				rc = ecryptfs_decrypt_page(folio);  in ecryptfs_write_begin()
313 					       __func__, folio->index, rc);  in ecryptfs_write_begin()
314 					folio_clear_uptodate(folio);  in ecryptfs_write_begin()
317 				folio_mark_uptodate(folio);  in ecryptfs_write_begin()
340 		folio_zero_range(folio, 0, PAGE_SIZE);  in ecryptfs_write_begin()
343 		folio_unlock(folio);  in ecryptfs_write_begin()
344 		folio_put(folio);  in ecryptfs_write_begin()
443 			struct folio *folio, void *fsdata)  in ecryptfs_write_end()  argument
457 				folio, 0, to);  in ecryptfs_write_end()
465 	if (!folio_test_uptodate(folio)) {  in ecryptfs_write_end()
470 		folio_mark_uptodate(folio);  in ecryptfs_write_end()
473 	rc = fill_zeros_to_end_of_page(folio, to);  in ecryptfs_write_end()
479 	rc = ecryptfs_encrypt_page(folio);  in ecryptfs_write_end()
498 	folio_unlock(folio);  in ecryptfs_write_end()
499 	folio_put(folio);  in ecryptfs_write_end()