47 struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index)  in ecryptfs_get_locked_page()
49 	struct page *page = read_mapping_page(inode->i_mapping, index, NULL);  in ecryptfs_get_locked_page()  local
50 	if (!IS_ERR(page))  in ecryptfs_get_locked_page()
51 		lock_page(page);  in ecryptfs_get_locked_page()
52 	return page;  in ecryptfs_get_locked_page()
65 static int ecryptfs_writepage(struct page *page, struct writeback_control *wbc)  in ecryptfs_writepage()  argument
69 	rc = ecryptfs_encrypt_page(page);  in ecryptfs_writepage()
72 				"page (upper index [0x%.16lx])\n", page->index);  in ecryptfs_writepage()
73 		ClearPageUptodate(page);  in ecryptfs_writepage()
76 	SetPageUptodate(page);  in ecryptfs_writepage()
78 	unlock_page(page);  in ecryptfs_writepage()
122 ecryptfs_copy_up_encrypted_with_header(struct page *page,  in ecryptfs_copy_up_encrypted_with_header()  argument
131 		loff_t view_extent_num = ((((loff_t)page->index)  in ecryptfs_copy_up_encrypted_with_header()
141 			page_virt = kmap_atomic(page);  in ecryptfs_copy_up_encrypted_with_header()
148 					page_virt, page->mapping->host);  in ecryptfs_copy_up_encrypted_with_header()
155 			flush_dcache_page(page);  in ecryptfs_copy_up_encrypted_with_header()
168 				page, (lower_offset >> PAGE_CACHE_SHIFT),  in ecryptfs_copy_up_encrypted_with_header()
170 				crypt_stat->extent_size, page->mapping->host);  in ecryptfs_copy_up_encrypted_with_header()
194 static int ecryptfs_readpage(struct file *file, struct page *page)  in ecryptfs_readpage()  argument
197 		&ecryptfs_inode_to_private(page->mapping->host)->crypt_stat;  in ecryptfs_readpage()
201 		rc = ecryptfs_read_lower_page_segment(page, page->index, 0,  in ecryptfs_readpage()
203 						      page->mapping->host);  in ecryptfs_readpage()
206 			rc = ecryptfs_copy_up_encrypted_with_header(page,  in ecryptfs_readpage()
219 				page, page->index, 0, PAGE_CACHE_SIZE,  in ecryptfs_readpage()
220 				page->mapping->host);  in ecryptfs_readpage()
228 		rc = ecryptfs_decrypt_page(page);  in ecryptfs_readpage()
237 		ClearPageUptodate(page);  in ecryptfs_readpage()
239 		SetPageUptodate(page);  in ecryptfs_readpage()
241 			page->index);  in ecryptfs_readpage()
242 	unlock_page(page);  in ecryptfs_readpage()
249 static int fill_zeros_to_end_of_page(struct page *page, unsigned int to)  in fill_zeros_to_end_of_page()  argument
251 	struct inode *inode = page->mapping->host;  in fill_zeros_to_end_of_page()
254 	if ((i_size_read(inode) / PAGE_CACHE_SIZE) != page->index)  in fill_zeros_to_end_of_page()
259 	zero_user_segment(page, end_byte_in_page, PAGE_CACHE_SIZE);  in fill_zeros_to_end_of_page()
281 			struct page **pagep, void **fsdata)  in ecryptfs_write_begin()
284 	struct page *page;  in ecryptfs_write_begin()  local
288 	page = grab_cache_page_write_begin(mapping, index, flags);  in ecryptfs_write_begin()
289 	if (!page)  in ecryptfs_write_begin()
291 	*pagep = page;  in ecryptfs_write_begin()
294 	if (!PageUptodate(page)) {  in ecryptfs_write_begin()
300 				page, index, 0, PAGE_CACHE_SIZE, mapping->host);  in ecryptfs_write_begin()
305 				ClearPageUptodate(page);  in ecryptfs_write_begin()
308 				SetPageUptodate(page);  in ecryptfs_write_begin()
312 					page, crypt_stat);  in ecryptfs_write_begin()
320 					ClearPageUptodate(page);  in ecryptfs_write_begin()
323 				SetPageUptodate(page);  in ecryptfs_write_begin()
326 					page, index, 0, PAGE_CACHE_SIZE,  in ecryptfs_write_begin()
332 					ClearPageUptodate(page);  in ecryptfs_write_begin()
335 				SetPageUptodate(page);  in ecryptfs_write_begin()
339 			    >= i_size_read(page->mapping->host)) {  in ecryptfs_write_begin()
340 				zero_user(page, 0, PAGE_CACHE_SIZE);  in ecryptfs_write_begin()
341 				SetPageUptodate(page);  in ecryptfs_write_begin()
343 				rc = ecryptfs_decrypt_page(page);  in ecryptfs_write_begin()
348 					       __func__, page->index, rc);  in ecryptfs_write_begin()
349 					ClearPageUptodate(page);  in ecryptfs_write_begin()
352 				SetPageUptodate(page);  in ecryptfs_write_begin()
359 		if (prev_page_end_size > i_size_read(page->mapping->host)) {  in ecryptfs_write_begin()
375 		zero_user(page, 0, PAGE_CACHE_SIZE);  in ecryptfs_write_begin()
378 		unlock_page(page);  in ecryptfs_write_begin()
379 		page_cache_release(page);  in ecryptfs_write_begin()
481 			struct page *page, void *fsdata)  in ecryptfs_write_end()  argument
494 		rc = ecryptfs_write_lower_page_segment(ecryptfs_inode, page, 0,  in ecryptfs_write_end()
503 	if (!PageUptodate(page)) {  in ecryptfs_write_end()
508 		SetPageUptodate(page);  in ecryptfs_write_end()
511 	rc = fill_zeros_to_end_of_page(page, to);  in ecryptfs_write_end()
517 	rc = ecryptfs_encrypt_page(page);  in ecryptfs_write_end()
536 	unlock_page(page);  in ecryptfs_write_end()
537 	page_cache_release(page);  in ecryptfs_write_end()