r6: merge in the samba4 HEAD branch from cvs

to checkout try:

svn co svn+ssh://svn.samba.org/home/svn/samba/branches/SAMBA_4_0

metze

1 files changed, 148 insertions, 0 deletions

diff --git a/source/ntvfs/ntvfs_base.c b/source/ntvfs/ntvfs_base.c
new file mode 100644
index 00000000000..7ed8c738b6c
--- /dev/null
+++ b/source/ntvfs/ntvfs_base.c
@@ -0,0 +1,148 @@
+/* 
+   Unix SMB/CIFS implementation.
+   NTVFS base code
+
+   Copyright (C) Andrew Tridgell 2003
+   Copyright (C) Stefan (metze) 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
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+/*
+  this implements the core code for all NTVFS modules. Backends register themselves here.
+*/
+
+#include "includes.h"
+
+
+/* the list of currently registered NTVFS backends, note that there
+ * can be more than one backend with the same name, as long as they
+ * have different typesx */
+static struct {
+	const struct ntvfs_ops *ops;
+} *backends = NULL;
+static int num_backends;
+
+/*
+  register a NTVFS backend. 
+
+  The 'name' can be later used by other backends to find the operations
+  structure for this backend.  
+
+  The 'type' is used to specify whether this is for a disk, printer or IPC$ share
+*/
+static NTSTATUS ntvfs_register(void *_ops)
+{
+	const struct ntvfs_ops *ops = _ops;
+	struct ntvfs_ops *new_ops;
+	
+	if (ntvfs_backend_byname(ops->name, ops->type) != NULL) {
+		/* its already registered! */
+		DEBUG(0,("NTVFS backend '%s' for type %d already registered\n", 
+			 ops->name, (int)ops->type));
+		return NT_STATUS_OBJECT_NAME_COLLISION;
+	}
+
+	backends = Realloc(backends, sizeof(backends[0]) * (num_backends+1));
+	if (!backends) {
+		smb_panic("out of memory in ntvfs_register");
+	}
+
+	new_ops = smb_xmemdup(ops, sizeof(*ops));
+	new_ops->name = smb_xstrdup(ops->name);
+
+	backends[num_backends].ops = new_ops;
+
+	num_backends++;
+
+	DEBUG(3,("NTVFS backend '%s' for type %d registered\n", 
+		 ops->name,ops->type));
+
+	return NT_STATUS_OK;
+}
+
+
+/*
+  return the operations structure for a named backend of the specified type
+*/
+const struct ntvfs_ops *ntvfs_backend_byname(const char *name, enum ntvfs_type type)
+{
+	int i;
+
+	for (i=0;i<num_backends;i++) {
+		if (backends[i].ops->type == type && 
+		    strcmp(backends[i].ops->name, name) == 0) {
+			return backends[i].ops;
+		}
+	}
+
+	return NULL;
+}
+
+
+/*
+  return the NTVFS interface version, and the size of some critical types
+  This can be used by backends to either detect compilation errors, or provide
+  multiple implementations for different smbd compilation options in one module
+*/
+const struct ntvfs_critical_sizes *ntvfs_interface_version(void)
+{
+	static const struct ntvfs_critical_sizes critical_sizes = {
+		NTVFS_INTERFACE_VERSION,
+		sizeof(struct ntvfs_ops),
+		sizeof(SMB_OFF_T),
+		sizeof(struct tcon_context),
+		sizeof(struct request_context),
+	};
+
+	return &critical_sizes;
+}
+
+
+/*
+  initialise the NTVFS subsystem
+*/
+BOOL ntvfs_init(void)
+{
+	NTSTATUS status;
+
+	status = register_subsystem("ntvfs", ntvfs_register); 
+	if (!NT_STATUS_IS_OK(status)) {
+		return False;
+	}
+
+	/* FIXME: Perhaps panic if a basic backend, such as IPC, fails to initialise? */
+	static_init_ntvfs;
+
+	DEBUG(3,("NTVFS subsystem version %d initialised\n", NTVFS_INTERFACE_VERSION));
+	return True;
+}
+
+
+/*
+  initialise a connection structure to point at a NTVFS backend
+*/
+NTSTATUS ntvfs_init_connection(struct request_context *req)
+{
+	const char *handler = lp_ntvfs_handler(req->conn->service);
+
+	req->conn->ntvfs_ops = ntvfs_backend_byname(handler, req->conn->type);
+
+	if (!req->conn->ntvfs_ops) {
+		DEBUG(1,("ntvfs_init_connection: failed to find backend=%s, type=%d\n", handler, req->conn->type));
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+
+	return NT_STATUS_OK;
+}