783 static void mtty_disable_file(struct mtty_migration_file *migf)  in mtty_disable_file()  argument
785 	mutex_lock(&migf->lock);  in mtty_disable_file()
786 	migf->disabled = true;  in mtty_disable_file()
787 	migf->filled_size = 0;  in mtty_disable_file()
788 	migf->filp->f_pos = 0;  in mtty_disable_file()
789 	mutex_unlock(&migf->lock);  in mtty_disable_file()
824 	struct mtty_migration_file *migf = filp->private_data;  in mtty_release_migf()  local
826 	mtty_disable_file(migf);  in mtty_release_migf()
827 	mutex_destroy(&migf->lock);  in mtty_release_migf()
828 	kfree(migf);  in mtty_release_migf()
836 	struct mtty_migration_file *migf = filp->private_data;  in mtty_precopy_ioctl()  local
837 	struct mdev_state *mdev_state = migf->mdev_state;  in mtty_precopy_ioctl()
860 	mutex_lock(&migf->lock);  in mtty_precopy_ioctl()
862 	if (migf->disabled) {  in mtty_precopy_ioctl()
863 		mutex_unlock(&migf->lock);  in mtty_precopy_ioctl()
868 	if (*pos > migf->filled_size) {  in mtty_precopy_ioctl()
869 		mutex_unlock(&migf->lock);  in mtty_precopy_ioctl()
875 	info.initial_bytes = migf->filled_size - *pos;  in mtty_precopy_ioctl()
876 	mutex_unlock(&migf->lock);  in mtty_precopy_ioctl()
887 	struct mtty_migration_file *migf = filp->private_data;  in mtty_save_read()  local
895 	mutex_lock(&migf->lock);  in mtty_save_read()
897 	dev_dbg(migf->mdev_state->vdev.dev, "%s ask %zu\n", __func__, len);  in mtty_save_read()
899 	if (migf->disabled) {  in mtty_save_read()
904 	if (*pos > migf->filled_size) {  in mtty_save_read()
909 	len = min_t(size_t, migf->filled_size - *pos, len);  in mtty_save_read()
911 		if (copy_to_user(buf, (void *)&migf->data + *pos, len)) {  in mtty_save_read()
919 	dev_dbg(migf->mdev_state->vdev.dev, "%s read %zu\n", __func__, ret);  in mtty_save_read()
920 	mutex_unlock(&migf->lock);  in mtty_save_read()
934 	struct mtty_migration_file *migf = mdev_state->saving_migf;  in mtty_save_state()  local
937 	mutex_lock(&migf->lock);  in mtty_save_state()
939 		memcpy(&migf->data.ports[i],  in mtty_save_state()
941 		migf->filled_size += sizeof(struct serial_port);  in mtty_save_state()
944 		"%s filled to %zu\n", __func__, migf->filled_size);  in mtty_save_state()
945 	mutex_unlock(&migf->lock);  in mtty_save_state()
950 	struct mtty_migration_file *migf = mdev_state->resuming_migf;  in mtty_load_state()  local
953 	mutex_lock(&migf->lock);  in mtty_load_state()
955 	if (migf->filled_size < mtty_data_size(mdev_state)) {  in mtty_load_state()
958 			migf->filled_size);  in mtty_load_state()
959 		mutex_unlock(&migf->lock);  in mtty_load_state()
965 		       &migf->data.ports[i], sizeof(struct serial_port));  in mtty_load_state()
967 	mutex_unlock(&migf->lock);  in mtty_load_state()
975 	struct mtty_migration_file *migf = mdev_state->saving_migf;  in mtty_save_device_data()  local
978 	if (migf) {  in mtty_save_device_data()
984 	migf = kzalloc(sizeof(*migf), GFP_KERNEL_ACCOUNT);  in mtty_save_device_data()
985 	if (!migf)  in mtty_save_device_data()
988 	migf->filp = anon_inode_getfile("mtty_mig", &mtty_save_fops,  in mtty_save_device_data()
989 					migf, O_RDONLY);  in mtty_save_device_data()
990 	if (IS_ERR(migf->filp)) {  in mtty_save_device_data()
991 		int rc = PTR_ERR(migf->filp);  in mtty_save_device_data()
993 		kfree(migf);  in mtty_save_device_data()
997 	stream_open(migf->filp->f_inode, migf->filp);  in mtty_save_device_data()
998 	mutex_init(&migf->lock);  in mtty_save_device_data()
999 	migf->mdev_state = mdev_state;  in mtty_save_device_data()
1001 	migf->data.magic = MTTY_MAGIC;  in mtty_save_device_data()
1002 	migf->data.major_ver = MTTY_MAJOR_VER;  in mtty_save_device_data()
1003 	migf->data.minor_ver = MTTY_MINOR_VER;  in mtty_save_device_data()
1004 	migf->data.nr_ports = mdev_state->nr_ports;  in mtty_save_device_data()
1006 	migf->filled_size = offsetof(struct mtty_data, ports);  in mtty_save_device_data()
1009 		__func__, migf->filled_size);  in mtty_save_device_data()
1011 	ret = mdev_state->saving_migf = migf;  in mtty_save_device_data()
1023 	struct mtty_migration_file *migf = filp->private_data;  in mtty_resume_write()  local
1024 	struct mdev_state *mdev_state = migf->mdev_state;  in mtty_resume_write()
1040 	mutex_lock(&migf->lock);  in mtty_resume_write()
1042 	if (migf->disabled) {  in mtty_resume_write()
1047 	if (copy_from_user((void *)&migf->data + *pos, buf, len)) {  in mtty_resume_write()
1055 	dev_dbg(migf->mdev_state->vdev.dev, "%s received %zu, total %zu\n",  in mtty_resume_write()
1056 		__func__, len, migf->filled_size + len);  in mtty_resume_write()
1058 	if (migf->filled_size < offsetof(struct mtty_data, ports) &&  in mtty_resume_write()
1059 	    migf->filled_size + len >= offsetof(struct mtty_data, ports)) {  in mtty_resume_write()
1060 		if (migf->data.magic != MTTY_MAGIC || migf->data.flags ||  in mtty_resume_write()
1061 		    migf->data.major_ver != MTTY_MAJOR_VER ||  in mtty_resume_write()
1062 		    migf->data.minor_ver != MTTY_MINOR_VER ||  in mtty_resume_write()
1063 		    migf->data.nr_ports != mdev_state->nr_ports) {  in mtty_resume_write()
1064 			dev_dbg(migf->mdev_state->vdev.dev,  in mtty_resume_write()
1068 			dev_dbg(migf->mdev_state->vdev.dev,  in mtty_resume_write()
1073 	migf->filled_size += len;  in mtty_resume_write()
1076 	mutex_unlock(&migf->lock);  in mtty_resume_write()
1089 	struct mtty_migration_file *migf;  in mtty_resume_device_data()  local
1092 	migf = kzalloc(sizeof(*migf), GFP_KERNEL_ACCOUNT);  in mtty_resume_device_data()
1093 	if (!migf)  in mtty_resume_device_data()
1096 	migf->filp = anon_inode_getfile("mtty_mig", &mtty_resume_fops,  in mtty_resume_device_data()
1097 					migf, O_WRONLY);  in mtty_resume_device_data()
1098 	if (IS_ERR(migf->filp)) {  in mtty_resume_device_data()
1099 		ret = PTR_ERR(migf->filp);  in mtty_resume_device_data()
1100 		kfree(migf);  in mtty_resume_device_data()
1104 	stream_open(migf->filp->f_inode, migf->filp);  in mtty_resume_device_data()
1105 	mutex_init(&migf->lock);  in mtty_resume_device_data()
1106 	migf->mdev_state = mdev_state;  in mtty_resume_device_data()
1108 	mdev_state->resuming_migf = migf;  in mtty_resume_device_data()
1110 	return migf;  in mtty_resume_device_data()
1192 		struct mtty_migration_file *migf;  in mtty_step_state()  local
1194 		migf = mtty_save_device_data(mdev_state, new);  in mtty_step_state()
1195 		if (IS_ERR(migf))  in mtty_step_state()
1196 			return ERR_CAST(migf);  in mtty_step_state()
1198 		if (migf) {  in mtty_step_state()
1199 			get_file(migf->filp);  in mtty_step_state()
1201 			return migf->filp;  in mtty_step_state()
1208 		struct mtty_migration_file *migf;  in mtty_step_state()  local
1210 		migf = mtty_resume_device_data(mdev_state);  in mtty_step_state()
1211 		if (IS_ERR(migf))  in mtty_step_state()
1212 			return ERR_CAST(migf);  in mtty_step_state()
1214 		get_file(migf->filp);  in mtty_step_state()
1216 		return migf->filp;  in mtty_step_state()