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 = swap_type_of(swsusp_resume_device, 0);  in snapshot_open()
74 		data->mode = O_RDONLY;  in snapshot_open()
75 		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()
95 	data->frozen = false;  in snapshot_open()
96 	data->ready = false;  in snapshot_open()
97 	data->platform_support = false;  in snapshot_open()
98 	data->dev = 0;  in snapshot_open()
108 	struct snapshot_data *data;  in snapshot_release()  local
113 	data = filp->private_data;  in snapshot_release()
114 	data->dev = 0;  in snapshot_release()
115 	free_all_swap_pages(data->swap);  in snapshot_release()
116 	if (data->frozen) {  in snapshot_release()
120 	} else if (data->free_bitmaps) {  in snapshot_release()
123 	pm_notifier_call_chain(data->mode == O_RDONLY ?  in snapshot_release()
135 	struct snapshot_data *data;  in snapshot_read()  local
141 	data = filp->private_data;  in snapshot_read()
142 	if (!data->ready) {  in snapshot_read()
147 		res = snapshot_read_next(&data->handle);  in snapshot_read()
155 			data_of(data->handle), res);  in snapshot_read()
168 	struct snapshot_data *data;  in snapshot_write()  local
179 	data = filp->private_data;  in snapshot_write()
182 		res = snapshot_write_next(&data->handle);  in snapshot_write()
189 	if (!data_of(data->handle)) {  in snapshot_write()
194 	res = simple_write_to_buffer(data_of(data->handle), res, &pg_offp,  in snapshot_write()
209 static int snapshot_set_swap_area(struct snapshot_data *data,  in snapshot_set_swap_area()  argument
238 	data->swap = swap_type_of(swdev, offset);  in snapshot_set_swap_area()
239 	if (data->swap < 0)  in snapshot_set_swap_area()
241 	data->dev = swdev;  in snapshot_set_swap_area()
249 	struct snapshot_data *data;  in snapshot_ioctl()  local
269 	data = filp->private_data;  in snapshot_ioctl()
274 		if (data->frozen)  in snapshot_ioctl()
287 			data->frozen = true;  in snapshot_ioctl()
292 		if (!data->frozen || data->ready)  in snapshot_ioctl()
296 		data->free_bitmaps = false;  in snapshot_ioctl()
298 		data->frozen = false;  in snapshot_ioctl()
302 		if (data->mode != O_RDONLY || !data->frozen  || data->ready) {  in snapshot_ioctl()
307 		error = hibernation_snapshot(data->platform_support);  in snapshot_ioctl()
310 			data->ready = !freezer_test_done && !error;  in snapshot_ioctl()
316 		snapshot_write_finalize(&data->handle);  in snapshot_ioctl()
317 		if (data->mode != O_WRONLY || !data->frozen ||  in snapshot_ioctl()
318 		    !snapshot_image_loaded(&data->handle)) {  in snapshot_ioctl()
322 		error = hibernation_restore(data->platform_support);  in snapshot_ioctl()
327 		memset(&data->handle, 0, sizeof(struct snapshot_handle));  in snapshot_ioctl()
328 		data->ready = false;  in snapshot_ioctl()
345 		if (!data->ready) {  in snapshot_ioctl()
355 		size = count_swap_pages(data->swap, 1);  in snapshot_ioctl()
361 		if (data->swap < 0 || data->swap >= MAX_SWAPFILES) {  in snapshot_ioctl()
365 		offset = alloc_swapdev_block(data->swap);  in snapshot_ioctl()
375 		if (data->swap < 0 || data->swap >= MAX_SWAPFILES) {  in snapshot_ioctl()
379 		free_all_swap_pages(data->swap);  in snapshot_ioctl()
383 		if (!data->frozen) {  in snapshot_ioctl()
392 		data->ready = false;  in snapshot_ioctl()
396 		data->platform_support = !!arg;  in snapshot_ioctl()
400 		if (data->platform_support)  in snapshot_ioctl()
405 		error = snapshot_set_swap_area(data, (void __user *)arg);  in snapshot_ioctl()