turn cifs_setattr into a multiplexor that calls the correct function

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/inode.c

@@ -1709,21 +1709,18 @@ out:
 	return rc;
 }
 
-int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
+static int
+cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
 {
 	int xid;
 	struct inode *inode = direntry->d_inode;
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct cifsTconInfo *pTcon = cifs_sb->tcon;
 	struct cifsInodeInfo *cifsInode = CIFS_I(inode);
 	char *full_path = NULL;
 	int rc = -EACCES;
 	__u32 dosattr = 0;
 	__u64 mode = NO_CHANGE_64;
 
-	if (pTcon->unix_ext)
-		return cifs_setattr_unix(direntry, attrs);
-
 	xid = GetXid();
 
 	cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
@@ -1850,6 +1847,21 @@ cifs_setattr_exit:
 	return rc;
 }
 
+int
+cifs_setattr(struct dentry *direntry, struct iattr *attrs)
+{
+	struct inode *inode = direntry->d_inode;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifsTconInfo *pTcon = cifs_sb->tcon;
+
+	if (pTcon->unix_ext)
+		return cifs_setattr_unix(direntry, attrs);
+
+	return cifs_setattr_nounix(direntry, attrs);
+
+	/* BB: add cifs_setattr_legacy for really old servers */
+}
+
 #if 0
 void cifs_delete_inode(struct inode *inode)
 {