fs/erofs/super.c

148 	if (!sbi->devs->flatdev && !dif->path) {
163 	} else if (!sbi->devs->flatdev) {
212 	if (sbi->devs->extra_devices &&
213 	    ondisk_extradevs != sbi->devs->extra_devices) {
215 			  ondisk_extradevs, sbi->devs->extra_devices);
226 	if (!sbi->devs->extra_devices && !erofs_is_fscache_mode(sb))
227 		sbi->devs->flatdev = true;
231 	down_read(&sbi->devs->rwsem);
232 	if (sbi->devs->extra_devices) {
233 		idr_for_each_entry(&sbi->devs->tree, dif, id) {
246 			err = idr_alloc(&sbi->devs->tree, dif, 0, 0, GFP_KERNEL);
251 			++sbi->devs->extra_devices;
258 	up_read(&sbi->devs->rwsem);
493 		down_write(&sbi->devs->rwsem);
494 		ret = idr_alloc(&sbi->devs->tree, dif, 0, 0, GFP_KERNEL);
495 		up_write(&sbi->devs->rwsem);
501 		++sbi->devs->extra_devices;
809 static void erofs_free_dev_context(struct erofs_dev_context *devs)
811 	if (!devs)
813 	idr_for_each(&devs->tree, &erofs_release_device_info, NULL);
814 	idr_destroy(&devs->tree);
815 	kfree(devs);
820 	erofs_free_dev_context(sbi->devs);
851 	sbi->devs = kzalloc(sizeof(struct erofs_dev_context), GFP_KERNEL);
852 	if (!sbi->devs) {
858 	idr_init(&sbi->devs->tree);
859 	init_rwsem(&sbi->devs->rwsem);
901 	erofs_free_dev_context(sbi->devs);
902 	sbi->devs = NULL;