xfs: use a per-resource struct for incore dquot data

Introduce a new struct xfs_dquot_res that we'll use to track all the
incore data for a particular resource type (block, inode, rt block).
This will help us (once we've eliminated q_core) to declutter quota
functions that currently open-code field access or pass around fields
around explicitly.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index a2a860a..aed4a76 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -1092,14 +1092,14 @@ xfs_qm_quotacheck_dqadjust(
 	 * resource usage.
 	 */
 	be64_add_cpu(&dqp->q_core.d_icount, 1);
-	dqp->q_res_icount++;
+	dqp->q_ino.reserved++;
 	if (nblks) {
 		be64_add_cpu(&dqp->q_core.d_bcount, nblks);
-		dqp->q_res_bcount += nblks;
+		dqp->q_blk.reserved += nblks;
 	}
 	if (rtblks) {
 		be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
-		dqp->q_res_rtbcount += rtblks;
+		dqp->q_rtb.reserved += rtblks;
 	}
 
 	/*