46 struct page *ecryptfs_get_locked_page(struct file *file, loff_t index)  in ecryptfs_get_locked_page()
51 	struct page *page;  in ecryptfs_get_locked_page()  local
56 	page = read_mapping_page(mapping, index, (void *)file);  in ecryptfs_get_locked_page()
57 	if (!IS_ERR(page))  in ecryptfs_get_locked_page()
58 		lock_page(page);  in ecryptfs_get_locked_page()
59 	return page;  in ecryptfs_get_locked_page()
68 static int ecryptfs_writepage(struct page *page, struct writeback_control *wbc)  in ecryptfs_writepage()  argument
72 	rc = ecryptfs_encrypt_page(page);  in ecryptfs_writepage()
75 				"page (upper index [0x%.16x])\n", page->index);  in ecryptfs_writepage()
76 		ClearPageUptodate(page);  in ecryptfs_writepage()
79 	SetPageUptodate(page);  in ecryptfs_writepage()
80 	unlock_page(page);  in ecryptfs_writepage()
125 ecryptfs_copy_up_encrypted_with_header(struct page *page,  in ecryptfs_copy_up_encrypted_with_header()  argument
134 		loff_t view_extent_num = ((((loff_t)page->index)  in ecryptfs_copy_up_encrypted_with_header()
145 			page_virt = kmap_atomic(page, KM_USER0);  in ecryptfs_copy_up_encrypted_with_header()
150 					page_virt, page->mapping->host);  in ecryptfs_copy_up_encrypted_with_header()
154 			flush_dcache_page(page);  in ecryptfs_copy_up_encrypted_with_header()
167 				page, (lower_offset >> PAGE_CACHE_SHIFT),  in ecryptfs_copy_up_encrypted_with_header()
169 				crypt_stat->extent_size, page->mapping->host);  in ecryptfs_copy_up_encrypted_with_header()
193 static int ecryptfs_readpage(struct file *file, struct page *page)  in ecryptfs_readpage()  argument
204 		rc = ecryptfs_read_lower_page_segment(page, page->index, 0,  in ecryptfs_readpage()
206 						      page->mapping->host);  in ecryptfs_readpage()
209 			rc = ecryptfs_copy_up_encrypted_with_header(page,  in ecryptfs_readpage()
222 				page, page->index, 0, PAGE_CACHE_SIZE,  in ecryptfs_readpage()
223 				page->mapping->host);  in ecryptfs_readpage()
231 		rc = ecryptfs_decrypt_page(page);  in ecryptfs_readpage()
240 		ClearPageUptodate(page);  in ecryptfs_readpage()
242 		SetPageUptodate(page);  in ecryptfs_readpage()
244 			page->index);  in ecryptfs_readpage()
245 	unlock_page(page);  in ecryptfs_readpage()
252 static int fill_zeros_to_end_of_page(struct page *page, unsigned int to)  in fill_zeros_to_end_of_page()  argument
254 	struct inode *inode = page->mapping->host;  in fill_zeros_to_end_of_page()
257 	if ((i_size_read(inode) / PAGE_CACHE_SIZE) != page->index)  in fill_zeros_to_end_of_page()
262 	zero_user_segment(page, end_byte_in_page, PAGE_CACHE_SIZE);  in fill_zeros_to_end_of_page()
284 			struct page **pagep, void **fsdata)  in ecryptfs_write_begin()
287 	struct page *page;  in ecryptfs_write_begin()  local
291 	page = grab_cache_page_write_begin(mapping, index, flags);  in ecryptfs_write_begin()
292 	if (!page)  in ecryptfs_write_begin()
294 	*pagep = page;  in ecryptfs_write_begin()
296 	if (!PageUptodate(page)) {  in ecryptfs_write_begin()
304 				page, index, 0, PAGE_CACHE_SIZE, mapping->host);  in ecryptfs_write_begin()
309 				ClearPageUptodate(page);  in ecryptfs_write_begin()
312 				SetPageUptodate(page);  in ecryptfs_write_begin()
316 					page, crypt_stat);  in ecryptfs_write_begin()
324 					ClearPageUptodate(page);  in ecryptfs_write_begin()
327 				SetPageUptodate(page);  in ecryptfs_write_begin()
330 					page, index, 0, PAGE_CACHE_SIZE,  in ecryptfs_write_begin()
336 					ClearPageUptodate(page);  in ecryptfs_write_begin()
339 				SetPageUptodate(page);  in ecryptfs_write_begin()
342 			rc = ecryptfs_decrypt_page(page);  in ecryptfs_write_begin()
346 				       __func__, page->index, rc);  in ecryptfs_write_begin()
347 				ClearPageUptodate(page);  in ecryptfs_write_begin()
350 			SetPageUptodate(page);  in ecryptfs_write_begin()
357 		if (prev_page_end_size > i_size_read(page->mapping->host)) {  in ecryptfs_write_begin()
373 		zero_user(page, 0, PAGE_CACHE_SIZE);  in ecryptfs_write_begin()
475 			struct page *page, void *fsdata)  in ecryptfs_write_end()  argument
494 	rc = fill_zeros_to_end_of_page(page, to);  in ecryptfs_write_end()
500 	rc = ecryptfs_encrypt_page(page);  in ecryptfs_write_end()
518 	unlock_page(page);  in ecryptfs_write_end()
519 	page_cache_release(page);  in ecryptfs_write_end()