[XFS] simplify xfs_vn_getattr

Just fill in struct kstat directly from the xfs_inode instead of doing a
detour through a bhv_vattr_t and xfs_getattr.

SGI-PV: 970980
SGI-Modid: xfs-linux-melb:xfs-kern:29770a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

fs/xfs/linux-2.6/xfs_iops.c

@@ -555,33 +555,61 @@ xfs_vn_permission(
 
 STATIC int
 xfs_vn_getattr(
-	struct vfsmount	*mnt,
-	struct dentry	*dentry,
-	struct kstat	*stat)
+	struct vfsmount		*mnt,
+	struct dentry		*dentry,
+	struct kstat		*stat)
 {
-	struct inode	*inode = dentry->d_inode;
-	bhv_vattr_t	vattr = { .va_mask = XFS_AT_STAT };
-	int		error;
-
-	error = xfs_getattr(XFS_I(inode), &vattr, ATTR_LAZY);
-	if (likely(!error)) {
-		stat->size = i_size_read(inode);
-		stat->dev = inode->i_sb->s_dev;
-		stat->rdev = (vattr.va_rdev == 0) ? 0 :
-				MKDEV(sysv_major(vattr.va_rdev) & 0x1ff,
-				      sysv_minor(vattr.va_rdev));
-		stat->mode = vattr.va_mode;
-		stat->nlink = vattr.va_nlink;
-		stat->uid = vattr.va_uid;
-		stat->gid = vattr.va_gid;
-		stat->ino = vattr.va_nodeid;
-		stat->atime = vattr.va_atime;
-		stat->mtime = vattr.va_mtime;
-		stat->ctime = vattr.va_ctime;
-		stat->blocks = vattr.va_nblocks;
-		stat->blksize = vattr.va_blocksize;
+	struct inode		*inode = dentry->d_inode;
+	struct xfs_inode	*ip = XFS_I(inode);
+	struct xfs_mount	*mp = ip->i_mount;
+
+	xfs_itrace_entry(ip);
+
+	if (XFS_FORCED_SHUTDOWN(mp))
+		return XFS_ERROR(EIO);
+
+	stat->size = XFS_ISIZE(ip);
+	stat->dev = inode->i_sb->s_dev;
+	stat->mode = ip->i_d.di_mode;
+	stat->nlink = ip->i_d.di_nlink;
+	stat->uid = ip->i_d.di_uid;
+	stat->gid = ip->i_d.di_gid;
+	stat->ino = ip->i_ino;
+#if XFS_BIG_INUMS
+	stat->ino += mp->m_inoadd;
+#endif
+	stat->atime = inode->i_atime;
+	stat->mtime.tv_sec = ip->i_d.di_mtime.t_sec;
+	stat->mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
+	stat->ctime.tv_sec = ip->i_d.di_ctime.t_sec;
+	stat->ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
+	stat->blocks =
+		XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
+
+
+	switch (inode->i_mode & S_IFMT) {
+	case S_IFBLK:
+	case S_IFCHR:
+		stat->blksize = BLKDEV_IOSIZE;
+		stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
+				   sysv_minor(ip->i_df.if_u2.if_rdev));
+		break;
+	default:
+		if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) {
+			/*
+			 * If the file blocks are being allocated from a
+			 * realtime volume, then return the inode's realtime
+			 * extent size or the realtime volume's extent size.
+			 */
+			stat->blksize =
+				xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
+		} else
+			stat->blksize = xfs_preferred_iosize(mp);
+		stat->rdev = 0;
+		break;
 	}
-	return -error;
+
+	return 0;
 }
 
 STATIC int