scoutfs: add tot m/d device blocks to statfs_more

The total_{meta,data}_blocks scoutfs_super_block fields initialized by
mkfs aren't visible to userspace anywhere.  Add them to statfs_more so
that tools can get the totals (and use them for df, in this particular
case).

Signed-off-by: Zach Brown <zab@versity.com>

kmod/src/ioctl.c

@@ -857,6 +857,8 @@ static long scoutfs_ioc_statfs_more(struct file *file, unsigned long arg)
 				sizeof(struct scoutfs_ioctl_statfs_more));
 	sfm.fsid = le64_to_cpu(super->hdr.fsid);
 	sfm.rid = sbi->rid;
+	sfm.total_meta_blocks = le64_to_cpu(super->total_meta_blocks);
+	sfm.total_data_blocks = le64_to_cpu(super->total_data_blocks);
 
 	ret = scoutfs_client_get_last_seq(sb, &sfm.committed_seq);
 	if (ret)

kmod/src/ioctl.h

@@ -369,6 +369,8 @@ struct scoutfs_ioctl_statfs_more {
 	__u64 fsid;
 	__u64 rid;
 	__u64 committed_seq;
+	__u64 total_meta_blocks;
+	__u64 total_data_blocks;
 } __packed;
 
 #define SCOUTFS_IOC_STATFS_MORE _IOR(SCOUTFS_IOCTL_MAGIC, 10, \