orangefs: Cache getattr results.

The userspace component attempts to do this, but this will prevent
us from even needing to go into userspace to satisfy certain getattr
requests.

Signed-off-by: Martin Brandenburg <martin@omnibond.com>
diff --git a/fs/orangefs/namei.c b/fs/orangefs/namei.c
index b37f80b..dde6c36 100644
--- a/fs/orangefs/namei.c
+++ b/fs/orangefs/namei.c
@@ -73,6 +73,7 @@
 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
 	dentry->d_time = jiffies + HZ;
+	ORANGEFS_I(inode)->getattr_time = 0;
 
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s: dentry instantiated for %s\n",
@@ -192,6 +193,8 @@
 		goto out;
 	}
 
+	ORANGEFS_I(inode)->getattr_time = 0;
+
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s:%s:%d "
 		     "Found good inode [%lu] with count [%d]\n",
@@ -320,6 +323,7 @@
 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
 	dentry->d_time = jiffies + HZ;
+	ORANGEFS_I(inode)->getattr_time = 0;
 
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Inode (Symlink) %pU -> %s\n",
@@ -383,6 +387,7 @@
 	d_instantiate(dentry, inode);
 	unlock_new_inode(inode);
 	dentry->d_time = jiffies + HZ;
+	ORANGEFS_I(inode)->getattr_time = 0;
 
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Inode (Directory) %pU -> %s\n",
@@ -413,6 +418,8 @@
 		     "orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
 		     old_dentry, new_dentry, d_count(new_dentry));
 
+	ORANGEFS_I(new_dentry->d_parent->d_inode)->getattr_time = 0;
+
 	new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
 	if (!new_op)
 		return -EINVAL;