[GFS2] Shrink gfs2_inode (1) - di_header/di_num

The metadata header doesn't need to be stored in the incore
struct gfs2_inode since its constant, and this patch removes it.
Also, there is already a field for the inode's number in the
struct gfs2_inode, so we don't need one in struct gfs2_dinode_host
as well.

This saves 28 bytes of space in the struct gfs2_inode.

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

1 files changed, 11 insertions, 14 deletions

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 4c5d286fefd..7ba05fc553a 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -208,13 +208,18 @@ fail:
         return ERR_PTR(error);
 }
 
-static void gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
+static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 {
         struct gfs2_dinode_host *di = &ip->i_di;
         const struct gfs2_dinode *str = buf;
 
-        gfs2_meta_header_in(&di->di_header, buf);
-        gfs2_inum_in(&di->di_num, &str->di_num);
+        if (ip->i_num.no_addr != be64_to_cpu(str->di_num.no_addr)) {
+                if (gfs2_consist_inode(ip))
+                        gfs2_dinode_print(ip);
+                return -EIO;
+        }
+        if (ip->i_num.no_formal_ino != be64_to_cpu(str->di_num.no_formal_ino))
+                return -ESTALE;
 
         di->di_mode = be32_to_cpu(str->di_mode);
         di->di_uid = be32_to_cpu(str->di_uid);
@@ -240,6 +245,7 @@ static void gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
         di->di_entries = be32_to_cpu(str->di_entries);
 
         di->di_eattr = be64_to_cpu(str->di_eattr);
+        return 0;
 }
 
 /**
@@ -263,21 +269,12 @@ int gfs2_inode_refresh(struct gfs2_inode *ip)
                 return -EIO;
         }
 
-        gfs2_dinode_in(ip, dibh->b_data);
+        error = gfs2_dinode_in(ip, dibh->b_data);
 
         brelse(dibh);
-
-        if (ip->i_num.no_addr != ip->i_di.di_num.no_addr) {
-                if (gfs2_consist_inode(ip))
-                        gfs2_dinode_print(ip);
-                return -EIO;
-        }
-        if (ip->i_num.no_formal_ino != ip->i_di.di_num.no_formal_ino)
-                return -ESTALE;
-
         ip->i_vn = ip->i_gl->gl_vn;
 
-        return 0;
+        return error;
 }
 
 int gfs2_dinode_dealloc(struct gfs2_inode *ip)