48 	struct snapshot_data *data;  in snapshot_open()  local
69 	data = &snapshot_state;  in snapshot_open()
70 	filp->private_data = data;  in snapshot_open()
71 	memset(&data->handle, 0, sizeof(struct snapshot_handle));  in snapshot_open()
74 		data->swap = swsusp_resume_device ?  in snapshot_open()
76 		data->mode = O_RDONLY;  in snapshot_open()
87 		data->swap = -1;  in snapshot_open()
88 		data->mode = O_WRONLY;  in snapshot_open()
97 	data->frozen = 0;  in snapshot_open()
98 	data->ready = 0;  in snapshot_open()
99 	data->platform_support = 0;  in snapshot_open()
109 	struct snapshot_data *data;  in snapshot_release()  local
115 	data = filp->private_data;  in snapshot_release()
116 	free_all_swap_pages(data->swap);  in snapshot_release()
117 	if (data->frozen) {  in snapshot_release()
121 	pm_notifier_call_chain(data->mode == O_RDONLY ?  in snapshot_release()
133 	struct snapshot_data *data;  in snapshot_read()  local
139 	data = filp->private_data;  in snapshot_read()
140 	if (!data->ready) {  in snapshot_read()
145 		res = snapshot_read_next(&data->handle);  in snapshot_read()
153 			data_of(data->handle), res);  in snapshot_read()
166 	struct snapshot_data *data;  in snapshot_write()  local
172 	data = filp->private_data;  in snapshot_write()
175 		res = snapshot_write_next(&data->handle);  in snapshot_write()
182 	res = simple_write_to_buffer(data_of(data->handle), res, &pg_offp,  in snapshot_write()
196 	struct snapshot_data *data;  in snapshot_ioctl()  local
210 	data = filp->private_data;  in snapshot_ioctl()
215 		if (data->frozen)  in snapshot_ioctl()
224 			data->frozen = 1;  in snapshot_ioctl()
228 		if (!data->frozen || data->ready)  in snapshot_ioctl()
232 		data->frozen = 0;  in snapshot_ioctl()
236 		if (data->mode != O_RDONLY || !data->frozen  || data->ready) {  in snapshot_ioctl()
241 		error = hibernation_snapshot(data->platform_support);  in snapshot_ioctl()
244 			data->ready = !freezer_test_done && !error;  in snapshot_ioctl()
250 		snapshot_write_finalize(&data->handle);  in snapshot_ioctl()
251 		if (data->mode != O_WRONLY || !data->frozen ||  in snapshot_ioctl()
252 		    !snapshot_image_loaded(&data->handle)) {  in snapshot_ioctl()
256 		error = hibernation_restore(data->platform_support);  in snapshot_ioctl()
261 		memset(&data->handle, 0, sizeof(struct snapshot_handle));  in snapshot_ioctl()
262 		data->ready = 0;  in snapshot_ioctl()
279 		if (!data->ready) {  in snapshot_ioctl()
289 		size = count_swap_pages(data->swap, 1);  in snapshot_ioctl()
295 		if (data->swap < 0 || data->swap >= MAX_SWAPFILES) {  in snapshot_ioctl()
299 		offset = alloc_swapdev_block(data->swap);  in snapshot_ioctl()
309 		if (data->swap < 0 || data->swap >= MAX_SWAPFILES) {  in snapshot_ioctl()
313 		free_all_swap_pages(data->swap);  in snapshot_ioctl()
317 		if (!data->frozen) {  in snapshot_ioctl()
326 		data->ready = 0;  in snapshot_ioctl()
330 		data->platform_support = !!arg;  in snapshot_ioctl()
334 		if (data->platform_support)  in snapshot_ioctl()
359 				data->swap = swap_type_of(swdev, offset, NULL);  in snapshot_ioctl()
360 				if (data->swap < 0)  in snapshot_ioctl()
363 				data->swap = -1;  in snapshot_ioctl()