33 struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index)  in ecryptfs_get_locked_page()
35 	struct page *page = read_mapping_page(inode->i_mapping, index, NULL);  in ecryptfs_get_locked_page()  local
36 	if (!IS_ERR(page))  in ecryptfs_get_locked_page()
37 		lock_page(page);  in ecryptfs_get_locked_page()
38 	return page;  in ecryptfs_get_locked_page()
51 static int ecryptfs_writepage(struct page *page, struct writeback_control *wbc)  in ecryptfs_writepage()  argument
55 	rc = ecryptfs_encrypt_page(page);  in ecryptfs_writepage()
58 				"page (upper index [0x%.16lx])\n", page->index);  in ecryptfs_writepage()
59 		ClearPageUptodate(page);  in ecryptfs_writepage()
62 	SetPageUptodate(page);  in ecryptfs_writepage()
64 	unlock_page(page);  in ecryptfs_writepage()
108 ecryptfs_copy_up_encrypted_with_header(struct page *page,  in ecryptfs_copy_up_encrypted_with_header()  argument
117 		loff_t view_extent_num = ((((loff_t)page->index)  in ecryptfs_copy_up_encrypted_with_header()
127 			page_virt = kmap_atomic(page);  in ecryptfs_copy_up_encrypted_with_header()
134 					page_virt, page->mapping->host);  in ecryptfs_copy_up_encrypted_with_header()
141 			flush_dcache_page(page);  in ecryptfs_copy_up_encrypted_with_header()
154 				page, (lower_offset >> PAGE_SHIFT),  in ecryptfs_copy_up_encrypted_with_header()
156 				crypt_stat->extent_size, page->mapping->host);  in ecryptfs_copy_up_encrypted_with_header()
180 static int ecryptfs_readpage(struct file *file, struct page *page)  in ecryptfs_readpage()  argument
183 		&ecryptfs_inode_to_private(page->mapping->host)->crypt_stat;  in ecryptfs_readpage()
187 		rc = ecryptfs_read_lower_page_segment(page, page->index, 0,  in ecryptfs_readpage()
189 						      page->mapping->host);  in ecryptfs_readpage()
192 			rc = ecryptfs_copy_up_encrypted_with_header(page,  in ecryptfs_readpage()
205 				page, page->index, 0, PAGE_SIZE,  in ecryptfs_readpage()
206 				page->mapping->host);  in ecryptfs_readpage()
214 		rc = ecryptfs_decrypt_page(page);  in ecryptfs_readpage()
223 		ClearPageUptodate(page);  in ecryptfs_readpage()
225 		SetPageUptodate(page);  in ecryptfs_readpage()
227 			page->index);  in ecryptfs_readpage()
228 	unlock_page(page);  in ecryptfs_readpage()
235 static int fill_zeros_to_end_of_page(struct page *page, unsigned int to)  in fill_zeros_to_end_of_page()  argument
237 	struct inode *inode = page->mapping->host;  in fill_zeros_to_end_of_page()
240 	if ((i_size_read(inode) / PAGE_SIZE) != page->index)  in fill_zeros_to_end_of_page()
245 	zero_user_segment(page, end_byte_in_page, PAGE_SIZE);  in fill_zeros_to_end_of_page()
267 			struct page **pagep, void **fsdata)  in ecryptfs_write_begin()
270 	struct page *page;  in ecryptfs_write_begin()  local
274 	page = grab_cache_page_write_begin(mapping, index, flags);  in ecryptfs_write_begin()
275 	if (!page)  in ecryptfs_write_begin()
277 	*pagep = page;  in ecryptfs_write_begin()
280 	if (!PageUptodate(page)) {  in ecryptfs_write_begin()
286 				page, index, 0, PAGE_SIZE, mapping->host);  in ecryptfs_write_begin()
291 				ClearPageUptodate(page);  in ecryptfs_write_begin()
294 				SetPageUptodate(page);  in ecryptfs_write_begin()
298 					page, crypt_stat);  in ecryptfs_write_begin()
306 					ClearPageUptodate(page);  in ecryptfs_write_begin()
309 				SetPageUptodate(page);  in ecryptfs_write_begin()
312 					page, index, 0, PAGE_SIZE,  in ecryptfs_write_begin()
318 					ClearPageUptodate(page);  in ecryptfs_write_begin()
321 				SetPageUptodate(page);  in ecryptfs_write_begin()
325 			    >= i_size_read(page->mapping->host)) {  in ecryptfs_write_begin()
326 				zero_user(page, 0, PAGE_SIZE);  in ecryptfs_write_begin()
327 				SetPageUptodate(page);  in ecryptfs_write_begin()
329 				rc = ecryptfs_decrypt_page(page);  in ecryptfs_write_begin()
334 					       __func__, page->index, rc);  in ecryptfs_write_begin()
335 					ClearPageUptodate(page);  in ecryptfs_write_begin()
338 				SetPageUptodate(page);  in ecryptfs_write_begin()
345 		if (prev_page_end_size > i_size_read(page->mapping->host)) {  in ecryptfs_write_begin()
361 		zero_user(page, 0, PAGE_SIZE);  in ecryptfs_write_begin()
364 		unlock_page(page);  in ecryptfs_write_begin()
365 		put_page(page);  in ecryptfs_write_begin()
465 			struct page *page, void *fsdata)  in ecryptfs_write_end()  argument
478 		rc = ecryptfs_write_lower_page_segment(ecryptfs_inode, page, 0,  in ecryptfs_write_end()
487 	if (!PageUptodate(page)) {  in ecryptfs_write_end()
492 		SetPageUptodate(page);  in ecryptfs_write_end()
495 	rc = fill_zeros_to_end_of_page(page, to);  in ecryptfs_write_end()
501 	rc = ecryptfs_encrypt_page(page);  in ecryptfs_write_end()
520 	unlock_page(page);  in ecryptfs_write_end()
521 	put_page(page);  in ecryptfs_write_end()