[XFS] Make growfs work for amounts greater than 2TB

The free block modification code has a 32bit interface, limiting the size
the filesystem can be grown even on 64 bit machines. On 32 bit machines,
there are other 32bit variables in transaction structures and interfaces
that need to be expanded to allow this to work.

SGI-PV: 959978
SGI-Modid: xfs-linux-melb:xfs-kern:27894a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>

fs/xfs/xfs_mount.c

@@ -52,11 +52,11 @@ STATIC void	xfs_unmountfs_wait(xfs_mount_t *);
 
 #ifdef HAVE_PERCPU_SB
 STATIC void	xfs_icsb_destroy_counters(xfs_mount_t *);
-STATIC void	xfs_icsb_balance_counter(xfs_mount_t *, xfs_sb_field_t, int,
-int);
+STATIC void	xfs_icsb_balance_counter(xfs_mount_t *, xfs_sb_field_t,
+						int, int);
 STATIC void	xfs_icsb_sync_counters(xfs_mount_t *);
 STATIC int	xfs_icsb_modify_counters(xfs_mount_t *, xfs_sb_field_t,
-						int, int);
+						int64_t, int);
 STATIC int	xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t);
 
 #else
@@ -1254,8 +1254,11 @@ xfs_mod_sb(xfs_trans_t *tp, __int64_t fields)
  * The SB_LOCK must be held when this routine is called.
  */
 int
-xfs_mod_incore_sb_unlocked(xfs_mount_t *mp, xfs_sb_field_t field,
-			int delta, int rsvd)
+xfs_mod_incore_sb_unlocked(
+	xfs_mount_t	*mp,
+	xfs_sb_field_t	field,
+	int64_t		delta,
+	int		rsvd)
 {
 	int		scounter;	/* short counter for 32 bit fields */
 	long long	lcounter;	/* long counter for 64 bit fields */
@@ -1287,7 +1290,6 @@ xfs_mod_incore_sb_unlocked(xfs_mount_t *mp, xfs_sb_field_t field,
 		mp->m_sb.sb_ifree = lcounter;
 		return 0;
 	case XFS_SBS_FDBLOCKS:
-
 		lcounter = (long long)
 			mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
 		res_used = (long long)(mp->m_resblks - mp->m_resblks_avail);
@@ -1418,7 +1420,11 @@ xfs_mod_incore_sb_unlocked(xfs_mount_t *mp, xfs_sb_field_t field,
  * routine to do the work.
  */
 int
-xfs_mod_incore_sb(xfs_mount_t *mp, xfs_sb_field_t field, int delta, int rsvd)
+xfs_mod_incore_sb(
+	xfs_mount_t	*mp,
+	xfs_sb_field_t	field,
+	int64_t		delta,
+	int		rsvd)
 {
 	unsigned long	s;
 	int	status;
@@ -2092,7 +2098,7 @@ int
 xfs_icsb_modify_counters(
 	xfs_mount_t	*mp,
 	xfs_sb_field_t	field,
-	int		delta,
+	int64_t		delta,
 	int		rsvd)
 {
 	xfs_icsb_cnts_t	*icsbp;