46 	struct snapshot_data *data;  in snapshot_open()  local
65 	data = &snapshot_state;  in snapshot_open()
66 	filp->private_data = data;  in snapshot_open()
67 	memset(&data->handle, 0, sizeof(struct snapshot_handle));  in snapshot_open()
70 		data->swap = swsusp_resume_device ?  in snapshot_open()
72 		data->mode = O_RDONLY;  in snapshot_open()
73 		data->free_bitmaps = false;  in snapshot_open()
84 		data->swap = -1;  in snapshot_open()
85 		data->mode = O_WRONLY;  in snapshot_open()
89 			data->free_bitmaps = !error;  in snapshot_open()
99 	data->frozen = false;  in snapshot_open()
100 	data->ready = false;  in snapshot_open()
101 	data->platform_support = false;  in snapshot_open()
111 	struct snapshot_data *data;  in snapshot_release()  local
116 	data = filp->private_data;  in snapshot_release()
117 	free_all_swap_pages(data->swap);  in snapshot_release()
118 	if (data->frozen) {  in snapshot_release()
122 	} else if (data->free_bitmaps) {  in snapshot_release()
125 	pm_notifier_call_chain(data->mode == O_RDONLY ?  in snapshot_release()
137 	struct snapshot_data *data;  in snapshot_read()  local
143 	data = filp->private_data;  in snapshot_read()
144 	if (!data->ready) {  in snapshot_read()
149 		res = snapshot_read_next(&data->handle);  in snapshot_read()
157 			data_of(data->handle), res);  in snapshot_read()
170 	struct snapshot_data *data;  in snapshot_write()  local
176 	data = filp->private_data;  in snapshot_write()
179 		res = snapshot_write_next(&data->handle);  in snapshot_write()
186 	if (!data_of(data->handle)) {  in snapshot_write()
191 	res = simple_write_to_buffer(data_of(data->handle), res, &pg_offp,  in snapshot_write()
205 	struct snapshot_data *data;  in snapshot_ioctl()  local
220 	data = filp->private_data;  in snapshot_ioctl()
225 		if (data->frozen)  in snapshot_ioctl()
238 			data->frozen = true;  in snapshot_ioctl()
243 		if (!data->frozen || data->ready)  in snapshot_ioctl()
247 		data->free_bitmaps = false;  in snapshot_ioctl()
249 		data->frozen = false;  in snapshot_ioctl()
253 		if (data->mode != O_RDONLY || !data->frozen  || data->ready) {  in snapshot_ioctl()
258 		error = hibernation_snapshot(data->platform_support);  in snapshot_ioctl()
261 			data->ready = !freezer_test_done && !error;  in snapshot_ioctl()
267 		snapshot_write_finalize(&data->handle);  in snapshot_ioctl()
268 		if (data->mode != O_WRONLY || !data->frozen ||  in snapshot_ioctl()
269 		    !snapshot_image_loaded(&data->handle)) {  in snapshot_ioctl()
273 		error = hibernation_restore(data->platform_support);  in snapshot_ioctl()
278 		memset(&data->handle, 0, sizeof(struct snapshot_handle));  in snapshot_ioctl()
279 		data->ready = false;  in snapshot_ioctl()
296 		if (!data->ready) {  in snapshot_ioctl()
306 		size = count_swap_pages(data->swap, 1);  in snapshot_ioctl()
312 		if (data->swap < 0 || data->swap >= MAX_SWAPFILES) {  in snapshot_ioctl()
316 		offset = alloc_swapdev_block(data->swap);  in snapshot_ioctl()
326 		if (data->swap < 0 || data->swap >= MAX_SWAPFILES) {  in snapshot_ioctl()
330 		free_all_swap_pages(data->swap);  in snapshot_ioctl()
334 		if (!data->frozen) {  in snapshot_ioctl()
343 		data->ready = false;  in snapshot_ioctl()
347 		data->platform_support = !!arg;  in snapshot_ioctl()
351 		if (data->platform_support)  in snapshot_ioctl()
376 				data->swap = swap_type_of(swdev, offset, NULL);  in snapshot_ioctl()
377 				if (data->swap < 0)  in snapshot_ioctl()
380 				data->swap = -1;  in snapshot_ioctl()