r3336: use a struct ntvfs_async_state to be able to do async chaning of ntvfs modules

the idea is that a passthru module can use ntvfs_async_state_push() before
calling ntvfs_next_*() and in the _send function it calls
ntvfs_async_state_pop() and then call the upper layer send_fn itself

- ntvfs_nbench is now fully async

- the ntvfs_map_*() functions and the trans(2) mapping functions are not converted yet

metze
(This used to be commit fde64c0dc142b53d128c8ba09af048dc58d8ef3a)

1 files changed, 37 insertions, 1 deletions

diff --git a/source4/ntvfs/ntvfs_util.c b/source4/ntvfs/ntvfs_util.c
index 4036fb0935c..929ec037de1 100644
--- a/source4/ntvfs/ntvfs_util.c
+++ b/source4/ntvfs/ntvfs_util.c
@@ -1,7 +1,7 @@
 /* 
    Unix SMB/CIFS implementation.
    NTVFS utility code
-   Copyright (C) Andrew Tridgell 2003
+   Copyright (C) Stefan Metzmacher 2004
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -23,4 +23,40 @@
 
 #include "includes.h"
 
+NTSTATUS ntvfs_async_state_push(struct smbsrv_request *req,
+				void *private_data,
+				void (*send_fn)(struct smbsrv_request *),
+				struct ntvfs_module_context *ntvfs)
+{
+	struct ntvfs_async_state *async;
 
+	async = talloc_p(req, struct ntvfs_async_state);
+	if (!async) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	async->state		= req->async_states->state;
+	async->private_data	= private_data;
+	async->send_fn		= send_fn;
+	async->status		= NT_STATUS_INTERNAL_ERROR;
+
+	async->ntvfs		= ntvfs;
+
+	DLIST_ADD(req->async_states, async);
+
+	return NT_STATUS_OK;
+}
+
+void ntvfs_async_state_pop(struct smbsrv_request *req)
+{
+	struct ntvfs_async_state *async;
+
+	async = req->async_states;
+
+	DLIST_REMOVE(req->async_states, async);
+
+	req->async_states->state	= async->state;
+	req->async_states->status	= async->status;
+
+	talloc_free(async);
+}