xfs: Introduce new structure members ag_state/agf_state

index 44d65c1..fd578e6 100644
@@ -69,6 +69,10 @@ typedef struct xfs_agf {
 	__be32		agf_freeblks;	/* total free blocks */
 	__be32		agf_longest;	/* longest free space */
 	__be32		agf_btreeblks;	/* # of blocks held in AGF btrees */
+	/*
+	 * A.G state for freespace allocation(allow/deny)
+	 */
+	__be32		agf_state;	/* persistent a.g. state */
 } xfs_agf_t;
 
 #define	XFS_AGF_MAGICNUM	0x00000001

@@ -83,7 +87,8 @@ typedef struct xfs_agf {
 #define	XFS_AGF_FREEBLKS	0x00000200
 #define	XFS_AGF_LONGEST		0x00000400
 #define	XFS_AGF_BTREEBLKS	0x00000800
-#define	XFS_AGF_NUM_BITS	12
+#define XFS_AGF_STATE		0x00001000
+#define	XFS_AGF_NUM_BITS	13
 #define	XFS_AGF_ALL_BITS	((1 << XFS_AGF_NUM_BITS) - 1)
 
 #define XFS_AGF_FLAGS \

@@ -98,7 +103,8 @@ typedef struct xfs_agf {
 	{ XFS_AGF_FLCOUNT,	"FLCOUNT" }, \
 	{ XFS_AGF_FREEBLKS,	"FREEBLKS" }, \
 	{ XFS_AGF_LONGEST,	"LONGEST" }, \
-	{ XFS_AGF_BTREEBLKS,	"BTREEBLKS" }
+	{ XFS_AGF_BTREEBLKS,	"BTREEBLKS" }, \
+	{ XFS_AGF_STATE,	"STATE" }
 
 /* disk block (xfs_daddr_t) in the AG */
 #define XFS_AGF_DADDR(mp)	((xfs_daddr_t)(1 << (mp)->m_sectbb_log))

@@ -159,7 +165,7 @@ typedef struct xfs_agi {
 #define	XFS_BUF_TO_AGI(bp)	((xfs_agi_t *)((bp)->b_addr))
 
 extern int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
-				xfs_agnumber_t agno, struct xfs_buf **bpp);
+			xfs_agnumber_t agno, struct xfs_buf **bpp);
 
 /*
  * The third a.g. block contains the a.g. freelist, an array

@@ -225,6 +231,7 @@ typedef struct xfs_perag {
 	struct rcu_head	rcu_head;
 #endif
 	int		pagb_count;	/* pagb slots in use */
+	__uint32_t	pag_state;	/* persistent a.g. state */
 } xfs_perag_t;
 
 /*