[GFS2] Eliminate (almost) duplicate field from gfs2_inode

The blocks counter is almost a duplicate of the i_blocks
field in the VFS inode. The only difference is that i_blocks
can be only 32bits long for 32bit arch without large single file
support. Since GFS2 doesn't handle the non-large single file
case (for 32 bit anyway) this adds a new config dependency on
64BIT || LSF. This has always been the case, however we've never
explicitly said so before.

Even if we do add support for the non-LSF case, we will still
not require this field to be duplicated since we will not be
able to access oversized files anyway.

So the net result of all this is that we shave 8 bytes from a gfs2_inode
and get our config deps correct.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 6 insertions, 12 deletions

diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 6780aa5841b2..e27e66046f0a 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -161,9 +161,8 @@ int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page)
 
 	if (ip->i_di.di_size) {
 		*(__be64 *)(di + 1) = cpu_to_be64(block);
-		ip->i_di.di_blocks++;
-		gfs2_set_inode_blocks(&ip->i_inode);
-		di->di_blocks = cpu_to_be64(ip->i_di.di_blocks);
+		gfs2_add_inode_blocks(&ip->i_inode, 1);
+		di->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
 	}
 
 	ip->i_height = 1;
@@ -238,10 +237,9 @@ static int build_height(struct inode *inode, struct metapath *mp, unsigned heigh
 	gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
 	*(__be64 *)(di + 1) = cpu_to_be64(bn);
 	ip->i_height += new_height;
-	ip->i_di.di_blocks += new_height;
-	gfs2_set_inode_blocks(&ip->i_inode);
+	gfs2_add_inode_blocks(&ip->i_inode, new_height);
 	di->di_height = cpu_to_be16(ip->i_height);
-	di->di_blocks = cpu_to_be64(ip->i_di.di_blocks);
+	di->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
 	brelse(dibh);
 	return error;
 }
@@ -380,8 +378,7 @@ static int lookup_block(struct gfs2_inode *ip, unsigned int height,
 	gfs2_trans_add_bh(ip->i_gl, mp->mp_bh[height], 1);
 
 	*ptr = cpu_to_be64(*block);
-	ip->i_di.di_blocks++;
-	gfs2_set_inode_blocks(&ip->i_inode);
+	gfs2_add_inode_blocks(&ip->i_inode, 1);
 
 	*new = 1;
 	return 0;
@@ -779,10 +776,7 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,
 		}
 
 		*p = 0;
-		if (!ip->i_di.di_blocks)
-			gfs2_consist_inode(ip);
-		ip->i_di.di_blocks--;
-		gfs2_set_inode_blocks(&ip->i_inode);
+		gfs2_add_inode_blocks(&ip->i_inode, -1);
 	}
 	if (bstart) {
 		if (metadata)