49 	struct snapshot_data *data;  in snapshot_open()  local
68 	data = &snapshot_state;  in snapshot_open()
69 	filp->private_data = data;  in snapshot_open()
70 	memset(&data->handle, 0, sizeof(struct snapshot_handle));  in snapshot_open()
73 		data->swap = swsusp_resume_device ?  in snapshot_open()
75 		data->mode = O_RDONLY;  in snapshot_open()
76 		data->free_bitmaps = false;  in snapshot_open()
87 		data->swap = -1;  in snapshot_open()
88 		data->mode = O_WRONLY;  in snapshot_open()
92 			data->free_bitmaps = !error;  in snapshot_open()
100 	data->frozen = false;  in snapshot_open()
101 	data->ready = false;  in snapshot_open()
102 	data->platform_support = false;  in snapshot_open()
112 	struct snapshot_data *data;  in snapshot_release()  local
117 	data = filp->private_data;  in snapshot_release()
118 	free_all_swap_pages(data->swap);  in snapshot_release()
119 	if (data->frozen) {  in snapshot_release()
123 	} else if (data->free_bitmaps) {  in snapshot_release()
126 	pm_notifier_call_chain(data->mode == O_RDONLY ?  in snapshot_release()
138 	struct snapshot_data *data;  in snapshot_read()  local
144 	data = filp->private_data;  in snapshot_read()
145 	if (!data->ready) {  in snapshot_read()
150 		res = snapshot_read_next(&data->handle);  in snapshot_read()
158 			data_of(data->handle), res);  in snapshot_read()
171 	struct snapshot_data *data;  in snapshot_write()  local
177 	data = filp->private_data;  in snapshot_write()
180 		res = snapshot_write_next(&data->handle);  in snapshot_write()
187 	res = simple_write_to_buffer(data_of(data->handle), res, &pg_offp,  in snapshot_write()
201 	struct snapshot_data *data;  in snapshot_ioctl()  local
216 	data = filp->private_data;  in snapshot_ioctl()
221 		if (data->frozen)  in snapshot_ioctl()
236 			data->frozen = true;  in snapshot_ioctl()
241 		if (!data->frozen || data->ready)  in snapshot_ioctl()
245 		data->free_bitmaps = false;  in snapshot_ioctl()
247 		data->frozen = false;  in snapshot_ioctl()
251 		if (data->mode != O_RDONLY || !data->frozen  || data->ready) {  in snapshot_ioctl()
256 		error = hibernation_snapshot(data->platform_support);  in snapshot_ioctl()
259 			data->ready = !freezer_test_done && !error;  in snapshot_ioctl()
265 		snapshot_write_finalize(&data->handle);  in snapshot_ioctl()
266 		if (data->mode != O_WRONLY || !data->frozen ||  in snapshot_ioctl()
267 		    !snapshot_image_loaded(&data->handle)) {  in snapshot_ioctl()
271 		error = hibernation_restore(data->platform_support);  in snapshot_ioctl()
276 		memset(&data->handle, 0, sizeof(struct snapshot_handle));  in snapshot_ioctl()
277 		data->ready = false;  in snapshot_ioctl()
294 		if (!data->ready) {  in snapshot_ioctl()
304 		size = count_swap_pages(data->swap, 1);  in snapshot_ioctl()
310 		if (data->swap < 0 || data->swap >= MAX_SWAPFILES) {  in snapshot_ioctl()
314 		offset = alloc_swapdev_block(data->swap);  in snapshot_ioctl()
324 		if (data->swap < 0 || data->swap >= MAX_SWAPFILES) {  in snapshot_ioctl()
328 		free_all_swap_pages(data->swap);  in snapshot_ioctl()
332 		if (!data->frozen) {  in snapshot_ioctl()
341 		data->ready = false;  in snapshot_ioctl()
345 		data->platform_support = !!arg;  in snapshot_ioctl()
349 		if (data->platform_support)  in snapshot_ioctl()
374 				data->swap = swap_type_of(swdev, offset, NULL);  in snapshot_ioctl()
375 				if (data->swap < 0)  in snapshot_ioctl()
378 				data->swap = -1;  in snapshot_ioctl()