->encode_fh() API change

pass inode + parent's inode or NULL instead of dentry + bool saying
whether we want the parent or not.

NOTE: that needs ceph fix folded in.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 56f6dcf..42678a3 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -627,12 +627,10 @@
 	return ERR_PTR(err);
 }
 
-static int fuse_encode_fh(struct dentry *dentry, u32 *fh, int *max_len,
-			   int connectable)
+static int fuse_encode_fh(struct inode *inode, u32 *fh, int *max_len,
+			   struct inode *parent)
 {
-	struct inode *inode = dentry->d_inode;
-	bool encode_parent = connectable && !S_ISDIR(inode->i_mode);
-	int len = encode_parent ? 6 : 3;
+	int len = parent ? 6 : 3;
 	u64 nodeid;
 	u32 generation;
 
@@ -648,14 +646,9 @@
 	fh[1] = (u32)(nodeid & 0xffffffff);
 	fh[2] = generation;
 
-	if (encode_parent) {
-		struct inode *parent;
-
-		spin_lock(&dentry->d_lock);
-		parent = dentry->d_parent->d_inode;
+	if (parent) {
 		nodeid = get_fuse_inode(parent)->nodeid;
 		generation = parent->i_generation;
-		spin_unlock(&dentry->d_lock);
 
 		fh[3] = (u32)(nodeid >> 32);
 		fh[4] = (u32)(nodeid & 0xffffffff);
@@ -663,7 +656,7 @@
 	}
 
 	*max_len = len;
-	return encode_parent ? 0x82 : 0x81;
+	return parent ? 0x82 : 0x81;
 }
 
 static struct dentry *fuse_fh_to_dentry(struct super_block *sb,