xfs: reserve quota for realtime files correctly

Fix xfs_quota_reserve_blkres to reserve rt block quota whenever we're
dealing with a realtime file.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

Author: Darrick J. Wong

fs/xfs/xfs_quota.h

@@ -130,6 +130,7 @@ extern void xfs_qm_mount_quotas(struct xfs_mount *);
 extern void xfs_qm_unmount(struct xfs_mount *);
 extern void xfs_qm_unmount_quotas(struct xfs_mount *);
 bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type);
+int xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks);
 
 # ifdef CONFIG_XFS_LIVE_HOOKS
 void xfs_trans_mod_ino_dquot(struct xfs_trans *tp, struct xfs_inode *ip,
@@ -209,19 +210,18 @@ xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp,
 #define xfs_qm_unmount_quotas(mp)
 #define xfs_inode_near_dquot_enforcement(ip, type)			(false)
 
+static inline int xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
+{
+	return 0;
+}
+
 # ifdef CONFIG_XFS_LIVE_HOOKS
 #  define xfs_dqtrx_hook_enable()		((void)0)
 #  define xfs_dqtrx_hook_disable()		((void)0)
 # endif /* CONFIG_XFS_LIVE_HOOKS */
 
 #endif /* CONFIG_XFS_QUOTA */
 
-static inline int
-xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
-{
-	return xfs_trans_reserve_quota_nblks(NULL, ip, blocks, 0, false);
-}
-
 static inline void
 xfs_quota_unreserve_blkres(struct xfs_inode *ip, uint64_t blocks)
 {

fs/xfs/xfs_trans_dquot.c

@@ -1031,3 +1031,14 @@ xfs_trans_free_dqinfo(
 	kmem_cache_free(xfs_dqtrx_cache, tp->t_dqinfo);
 	tp->t_dqinfo = NULL;
 }
+
+int
+xfs_quota_reserve_blkres(
+	struct xfs_inode	*ip,
+	int64_t			blocks)
+{
+	if (XFS_IS_REALTIME_INODE(ip))
+		return xfs_trans_reserve_quota_nblks(NULL, ip, 0, blocks,
+				false);
+	return xfs_trans_reserve_quota_nblks(NULL, ip, blocks, 0, false);
+}