From bc4b51bcb2daa7271c884cb83bf8bdba6d3a9b6d Mon Sep 17 00:00:00 2001
From: Jelmer Vernooij <jelmer@samba.org>
Date: Mon, 28 Apr 2003 17:48:48 +0000
Subject: [PATCH] Use NTSTATUS as return value for smb_register_*() functions
 and init_module() function. Patch by metze with some minor modifications.

---
 examples/VFS/skel.c             |  2 +-
 source/auth/auth.c              | 31 +++++++++++++++++++------------
 source/auth/auth_builtin.c      | 10 +++++-----
 source/auth/auth_domain.c       |  8 ++++----
 source/auth/auth_rhosts.c       |  8 ++++----
 source/auth/auth_sam.c          |  8 ++++----
 source/auth/auth_server.c       |  4 ++--
 source/auth/auth_unix.c         |  4 ++--
 source/auth/auth_winbind.c      |  4 ++--
 source/include/rpc_misc.h       |  2 +-
 source/include/smb.h            |  2 +-
 source/lib/iconv.c              | 15 ++++++++-------
 source/lib/module.c             | 22 +++++++++++-----------
 source/modules/vfs_audit.c      |  4 ++--
 source/modules/vfs_extd_audit.c |  4 ++--
 source/modules/vfs_fake_perms.c |  4 ++--
 source/modules/vfs_netatalk.c   |  4 ++--
 source/modules/vfs_recycle.c    |  6 +++---
 source/modules/weird.c          |  2 +-
 source/passdb/pdb_guest.c       |  4 ++--
 source/passdb/pdb_interface.c   | 24 +++++++++++++++++-------
 source/passdb/pdb_ldap.c        |  6 +++---
 source/passdb/pdb_mysql.c       |  4 ++--
 source/passdb/pdb_nisplus.c     |  4 ++--
 source/passdb/pdb_smbpasswd.c   |  8 ++++----
 source/passdb/pdb_tdb.c         |  8 ++++----
 source/passdb/pdb_xml.c         |  4 ++--
 source/rpc_server/srv_dfs.c     |  4 ++--
 source/rpc_server/srv_echo.c    |  4 ++--
 source/rpc_server/srv_lsa.c     |  4 ++--
 source/rpc_server/srv_netlog.c  |  4 ++--
 source/rpc_server/srv_pipe.c    | 26 ++++++++++++++++++++++----
 source/rpc_server/srv_reg.c     |  4 ++--
 source/rpc_server/srv_samr.c    |  4 ++--
 source/rpc_server/srv_spoolss.c |  4 ++--
 source/rpc_server/srv_srvsvc.c  |  4 ++--
 source/rpc_server/srv_wkssvc.c  |  4 ++--
 source/smbd/vfs.c               | 23 ++++++++++++-----------
 38 files changed, 164 insertions(+), 127 deletions(-)

diff --git a/examples/VFS/skel.c b/examples/VFS/skel.c
index f19323480fc..fe6e0731efa 100644
--- a/examples/VFS/skel.c
+++ b/examples/VFS/skel.c
@@ -451,7 +451,7 @@ static vfs_op_tuple *skel_init(const struct vfs_ops *def_vfs_ops,
 	return skel_ops;
 }
 
-int init_module(void)
+NTSTATUS init_module(void)
 {
 	return smb_register_vfs("skel", skel_init, SMB_VFS_INTERFACE_VERSION);
 }
diff --git a/source/auth/auth.c b/source/auth/auth.c
index 09e8f5e7225..8f718e3d4d3 100644
--- a/source/auth/auth.c
+++ b/source/auth/auth.c
@@ -25,21 +25,28 @@
 
 static struct auth_init_function_entry *backends = NULL;
 
-BOOL smb_register_auth(const char *name, auth_init_function init, int version)
+static struct auth_init_function_entry *auth_find_backend_entry(const char *name);
+
+NTSTATUS smb_register_auth(uint16 version, const char *name, auth_init_function init)
 {
 	struct auth_init_function_entry *entry = backends;
 
-	if(version != AUTH_INTERFACE_VERSION)
-		return False;
+	if (version != AUTH_INTERFACE_VERSION) {
+		DEBUG(0,("Can't register auth_method!\n"
+			 "You tried to register an auth module with AUTH_INTERFACE_VERSION %d, while this version of samba uses %d\n",
+			 version,AUTH_INTERFACE_VERSION));
+		return NT_STATUS_OBJECT_TYPE_MISMATCH;
+	}
+
+	if (!name || !init) {
+		return NT_STATUS_INVALID_PARAMETER;
+	}
 
 	DEBUG(5,("Attempting to register auth backend %s\n", name));
 
-	while(entry) {
-		if (strequal(name, entry->name)) {
-			DEBUG(0,("There already is an auth backend registered with the name %s!\n", name));
-			return False;
-		}
-		entry = entry->next;
+	if (auth_find_backend_entry(name)) {
+		DEBUG(0,("There already is an auth method registered with the name %s!\n", name));
+		return NT_STATUS_OBJECT_NAME_COLLISION;
 	}
 	
 	entry = smb_xmalloc(sizeof(struct auth_init_function_entry));
@@ -47,8 +54,8 @@ BOOL smb_register_auth(const char *name, auth_init_function init, int version)
 	entry->init = init;
 
 	DLIST_ADD(backends, entry);
-	DEBUG(5,("Successfully added auth backend '%s'\n", name));
-	return True;
+	DEBUG(5,("Successfully added auth method '%s'\n", name));
+	return NT_STATUS_OK;
 }
 
 static struct auth_init_function_entry *auth_find_backend_entry(const char *name)
@@ -365,7 +372,7 @@ BOOL load_auth_module(struct auth_context *auth_context,
 	
 	entry = auth_find_backend_entry(module_name);
 	
-	if(!(entry = auth_find_backend_entry(module_name)) && !smb_probe_module("auth", module_name) && 
+	if(!(entry = auth_find_backend_entry(module_name)) && NT_STATUS_IS_ERR(smb_probe_module("auth", module_name)) && 
 	   !(entry = auth_find_backend_entry(module_name))) {
 		DEBUG(0,("load_auth_module: can't find auth method %s!\n", module_name));
 	} else if (!NT_STATUS_IS_OK(entry->init(auth_context, module_params, ret))) {
diff --git a/source/auth/auth_builtin.c b/source/auth/auth_builtin.c
index 5d72898006c..5a9b5534ab6 100644
--- a/source/auth/auth_builtin.c
+++ b/source/auth/auth_builtin.c
@@ -163,12 +163,12 @@ static NTSTATUS auth_init_fixed_challenge(struct auth_context *auth_context, con
 }
 #endif /* DEVELOPER */
 
-int auth_builtin_init(void)
+NTSTATUS auth_builtin_init(void)
 {
-	smb_register_auth("guest", auth_init_guest, AUTH_INTERFACE_VERSION);
+	smb_register_auth(AUTH_INTERFACE_VERSION, "guest", auth_init_guest);
 #ifdef DEVELOPER
-	smb_register_auth("fixed_challenge", auth_init_fixed_challenge, AUTH_INTERFACE_VERSION);
-	smb_register_auth("name_to_ntstatus", auth_init_name_to_ntstatus, AUTH_INTERFACE_VERSION);
+	smb_register_auth(AUTH_INTERFACE_VERSION, "fixed_challenge", auth_init_fixed_challenge);
+	smb_register_auth(AUTH_INTERFACE_VERSION, "name_to_ntstatus", auth_init_name_to_ntstatus);
 #endif
-	return True;
+	return NT_STATUS_OK;
 }
diff --git a/source/auth/auth_domain.c b/source/auth/auth_domain.c
index db5f7d82b08..bc03fecf749 100644
--- a/source/auth/auth_domain.c
+++ b/source/auth/auth_domain.c
@@ -557,9 +557,9 @@ NTSTATUS auth_init_trustdomain(struct auth_context *auth_context, const char* pa
 	return NT_STATUS_OK;
 }
 
-int auth_domain_init(void) 
+NTSTATUS auth_domain_init(void) 
 {
-	smb_register_auth("trustdomain", auth_init_trustdomain, AUTH_INTERFACE_VERSION);
-	smb_register_auth("ntdomain", auth_init_ntdomain, AUTH_INTERFACE_VERSION);
-	return True;
+	smb_register_auth(AUTH_INTERFACE_VERSION, "trustdomain", auth_init_trustdomain);
+	smb_register_auth(AUTH_INTERFACE_VERSION, "ntdomain", auth_init_ntdomain);
+	return NT_STATUS_OK;
 }
diff --git a/source/auth/auth_rhosts.c b/source/auth/auth_rhosts.c
index db371935799..0875c482804 100644
--- a/source/auth/auth_rhosts.c
+++ b/source/auth/auth_rhosts.c
@@ -243,9 +243,9 @@ NTSTATUS auth_init_rhosts(struct auth_context *auth_context, const char *param,
 	return NT_STATUS_OK;
 }
 
-int auth_rhosts_init(void)
+NTSTATUS auth_rhosts_init(void)
 {
-	smb_register_auth("rhosts", auth_init_rhosts, AUTH_INTERFACE_VERSION);
-	smb_register_auth("hostsequiv", auth_init_hostsequiv, AUTH_INTERFACE_VERSION);
-	return True;
+	smb_register_auth(AUTH_INTERFACE_VERSION, "rhosts", auth_init_rhosts);
+	smb_register_auth(AUTH_INTERFACE_VERSION, "hostsequiv", auth_init_hostsequiv);
+	return NT_STATUS_OK;
 }
diff --git a/source/auth/auth_sam.c b/source/auth/auth_sam.c
index 1fc8aa51bb8..9a619f81f67 100644
--- a/source/auth/auth_sam.c
+++ b/source/auth/auth_sam.c
@@ -518,9 +518,9 @@ NTSTATUS auth_init_samstrict(struct auth_context *auth_context, const char *para
 	return NT_STATUS_OK;
 }
 
-int auth_sam_init(void)
+NTSTATUS auth_sam_init(void)
 {
-	smb_register_auth("samstrict", auth_init_samstrict, AUTH_INTERFACE_VERSION);
-	smb_register_auth("sam", auth_init_sam, AUTH_INTERFACE_VERSION);
-	return True;
+	smb_register_auth(AUTH_INTERFACE_VERSION, "samstrict", auth_init_samstrict);
+	smb_register_auth(AUTH_INTERFACE_VERSION, "sam", auth_init_sam);
+	return NT_STATUS_OK;
 }
diff --git a/source/auth/auth_server.c b/source/auth/auth_server.c
index a311f01dc3f..73af290af2a 100644
--- a/source/auth/auth_server.c
+++ b/source/auth/auth_server.c
@@ -401,7 +401,7 @@ NTSTATUS auth_init_smbserver(struct auth_context *auth_context, const char* para
 	return NT_STATUS_OK;
 }
 
-int auth_server_init(void)
+NTSTATUS auth_server_init(void)
 {
-	return smb_register_auth("smbserver", auth_init_smbserver, AUTH_INTERFACE_VERSION);
+	return smb_register_auth(AUTH_INTERFACE_VERSION, "smbserver", auth_init_smbserver);
 }
diff --git a/source/auth/auth_unix.c b/source/auth/auth_unix.c
index efab2046c36..392178f77c1 100644
--- a/source/auth/auth_unix.c
+++ b/source/auth/auth_unix.c
@@ -130,7 +130,7 @@ NTSTATUS auth_init_unix(struct auth_context *auth_context, const char* param, au
 	return NT_STATUS_OK;
 }
 
-int auth_unix_init(void)
+NTSTATUS auth_unix_init(void)
 {
-	return smb_register_auth("unix", auth_init_unix, AUTH_INTERFACE_VERSION);
+	return smb_register_auth(AUTH_INTERFACE_VERSION, "unix", auth_init_unix);
 }
diff --git a/source/auth/auth_winbind.c b/source/auth/auth_winbind.c
index 840898415be..76b5c341836 100644
--- a/source/auth/auth_winbind.c
+++ b/source/auth/auth_winbind.c
@@ -147,7 +147,7 @@ NTSTATUS auth_init_winbind(struct auth_context *auth_context, const char *param,
 	return NT_STATUS_OK;
 }
 
-int auth_winbind_init(void)
+NTSTATUS auth_winbind_init(void)
 {
-	return smb_register_auth("winbind", auth_init_winbind, AUTH_INTERFACE_VERSION);
+	return smb_register_auth(AUTH_INTERFACE_VERSION, "winbind", auth_init_winbind);
 }
diff --git a/source/include/rpc_misc.h b/source/include/rpc_misc.h
index 77104894351..d04a84d5083 100644
--- a/source/include/rpc_misc.h
+++ b/source/include/rpc_misc.h
@@ -26,7 +26,7 @@
 #ifndef _RPC_MISC_H /* _RPC_MISC_H */
 #define _RPC_MISC_H 
 
-
+#define SMB_RPC_INTERFACE_VERSION 1
 
 /* well-known RIDs - Relative IDs */
 
diff --git a/source/include/smb.h b/source/include/smb.h
index 62cc95ecb08..5ee6b971721 100644
--- a/source/include/smb.h
+++ b/source/include/smb.h
@@ -1736,6 +1736,6 @@ typedef struct {
 #include "popt_common.h"
 
 /* Module support */
-typedef int (init_module_function) (void);
+typedef NTSTATUS (init_module_function) (void);
 
 #endif /* _SMB_H */
diff --git a/source/lib/iconv.c b/source/lib/iconv.c
index 01fa31915a2..c09bff5fd7b 100644
--- a/source/lib/iconv.c
+++ b/source/lib/iconv.c
@@ -77,22 +77,23 @@ static struct charset_functions *find_charset_functions(const char *name)
 	return NULL;
 }
 
-BOOL smb_register_charset(struct charset_functions *funcs) 
+NTSTATUS smb_register_charset(struct charset_functions *funcs) 
 {
-	struct charset_functions *c = charsets;
+	if (!funcs) {
+		return NT_STATUS_INVALID_PARAMETER;
+	}
 
 	DEBUG(5, ("Attempting to register new charset %s\n", funcs->name));
 	/* Check whether we already have this charset... */
-
 	if (find_charset_functions(funcs->name)) {
 		DEBUG(0, ("Duplicate charset %s, not registering\n", funcs->name));
-		return False;
+		return NT_STATUS_OBJECT_NAME_COLLISION;
 	}
 
 	funcs->next = funcs->prev = NULL;
 	DEBUG(5, ("Registered charset %s\n", funcs->name));
 	DLIST_ADD(charsets, funcs);
-	return True;
+	return NT_STATUS_OK;
 }
 
 void lazy_initialize_iconv(void)
@@ -219,14 +220,14 @@ smb_iconv_t smb_iconv_open(const char *tocode, const char *fromcode)
 #endif
 	
 	/* check if there is a module available that can do this conversion */
-	if (!ret->pull && smb_probe_module("charset", fromcode)) {
+	if (!ret->pull && NT_STATUS_IS_OK(smb_probe_module("charset", fromcode))) {
 		if(!(from = find_charset_functions(fromcode)))
 			DEBUG(0, ("Module %s doesn't provide charset %s!\n", fromcode, fromcode));
 		else 
 			ret->pull = from->pull;
 	}
 
-	if (!ret->push && smb_probe_module("charset", tocode)) {
+	if (!ret->push && NT_STATUS_IS_OK(smb_probe_module("charset", tocode))) {
 		if(!(to = find_charset_functions(tocode)))
 			DEBUG(0, ("Module %s doesn't provide charset %s!\n", tocode, tocode));
 		else 
diff --git a/source/lib/module.c b/source/lib/module.c
index 53223cfebe2..087c964d3c7 100644
--- a/source/lib/module.c
+++ b/source/lib/module.c
@@ -22,11 +22,11 @@
 #include "includes.h"
 
 #ifdef HAVE_DLOPEN
-int smb_load_module(const char *module_name)
+NTSTATUS smb_load_module(const char *module_name)
 {
 	void *handle;
 	init_module_function *init;
-	int status;
+	NTSTATUS status;
 	const char *error;
 
 	/* Always try to use LAZY symbol resolving; if the plugin has 
@@ -37,7 +37,7 @@ int smb_load_module(const char *module_name)
 
 	if(!handle) {
 		DEBUG(0, ("Error loading module '%s': %s\n", module_name, sys_dlerror()));
-		return False;
+		return NT_STATUS_UNSUCCESSFUL;
 	}
 
 	init = sys_dlsym(handle, "init_module");
@@ -47,7 +47,7 @@ int smb_load_module(const char *module_name)
 	error = sys_dlerror();
 	if (error) {
 		DEBUG(0, ("Error trying to resolve symbol 'init_module' in %s: %s\n", module_name, error));
-		return False;
+		return NT_STATUS_UNSUCCESSFUL;
 	}
 
 	status = init();
@@ -65,7 +65,7 @@ int smb_load_modules(const char **modules)
 	int success = 0;
 
 	for(i = 0; modules[i]; i++){
-		if(smb_load_module(modules[i])) {
+		if(NT_STATUS_IS_OK(smb_load_module(modules[i]))) {
 			success++;
 		}
 	}
@@ -75,7 +75,7 @@ int smb_load_modules(const char **modules)
 	return success;
 }
 
-int smb_probe_module(const char *subsystem, const char *module)
+NTSTATUS smb_probe_module(const char *subsystem, const char *module)
 {
 	pstring full_path;
 	
@@ -95,22 +95,22 @@ int smb_probe_module(const char *subsystem, const char *module)
 
 #else /* HAVE_DLOPEN */
 
-int smb_load_module(const char *module_name)
+NTSTATUS smb_load_module(const char *module_name)
 {
 	DEBUG(0,("This samba executable has not been built with plugin support"));
-	return False;
+	return NT_STATUS_NOT_SUPPORTED;
 }
 
 int smb_load_modules(const char **modules)
 {
 	DEBUG(0,("This samba executable has not been built with plugin support"));
-	return False;
+	return -1;
 }
 
-int smb_probe_module(const char *subsystem, const char *module)
+NTSTATUS smb_probe_module(const char *subsystem, const char *module)
 {
 	DEBUG(0,("This samba executable has not been built with plugin support, not probing")); 
-	return False;
+	return NT_STATUS_NOT_SUPPORTED;
 }
 
 #endif /* HAVE_DLOPEN */
diff --git a/source/modules/vfs_audit.c b/source/modules/vfs_audit.c
index fa9bf67a672..4f9dc1b1e40 100644
--- a/source/modules/vfs_audit.c
+++ b/source/modules/vfs_audit.c
@@ -270,7 +270,7 @@ static int audit_fchmod_acl(struct files_struct *fsp, int fd, mode_t mode)
 	return result;
 }
 
-int vfs_audit_init(void)
+NTSTATUS vfs_audit_init(void)
 {
-	return smb_register_vfs("audit", audit_init, SMB_VFS_INTERFACE_VERSION);
+	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "audit", audit_init);
 }
diff --git a/source/modules/vfs_extd_audit.c b/source/modules/vfs_extd_audit.c
index f60acab36af..ef30ca70272 100644
--- a/source/modules/vfs_extd_audit.c
+++ b/source/modules/vfs_extd_audit.c
@@ -310,7 +310,7 @@ static int audit_fchmod_acl(struct files_struct *fsp, int fd, mode_t mode)
 	return result;
 }
 
-int vfs_extd_audit_init(void)
+NTSTATUS vfs_extd_audit_init(void)
 {
-	return smb_register_vfs("extd_audit", audit_init, SMB_VFS_INTERFACE_VERSION);
+	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "extd_audit", audit_init);
 }
diff --git a/source/modules/vfs_fake_perms.c b/source/modules/vfs_fake_perms.c
index 121a99a4519..3a18fbb730c 100644
--- a/source/modules/vfs_fake_perms.c
+++ b/source/modules/vfs_fake_perms.c
@@ -281,7 +281,7 @@ static vfs_op_tuple *fake_perms_init(const struct vfs_ops *def_vfs_ops,
 	return fake_perms_ops;
 }
 
-int vfs_fake_perms_init(void)
+NTSTATUS vfs_fake_perms_init(void)
 {
-	return smb_register_vfs("fake_perms", fake_perms_init, SMB_VFS_INTERFACE_VERSION);
+	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "fake_perms", fake_perms_init);
 }
diff --git a/source/modules/vfs_netatalk.c b/source/modules/vfs_netatalk.c
index c9e3cde6210..718bc2a35ca 100644
--- a/source/modules/vfs_netatalk.c
+++ b/source/modules/vfs_netatalk.c
@@ -421,7 +421,7 @@ static vfs_op_tuple *netatalk_init(const struct vfs_ops *def_vfs_ops,
 	return atalk_ops;
 }
 
-int vfs_netatalk_init(void)
+NTSTATUS vfs_netatalk_init(void)
 {
-	return smb_register_vfs("netatalk", netatalk_init, SMB_VFS_INTERFACE_VERSION);
+	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "netatalk", netatalk_init);
 }
diff --git a/source/modules/vfs_recycle.c b/source/modules/vfs_recycle.c
index 85ce257c026..87dea944ac0 100644
--- a/source/modules/vfs_recycle.c
+++ b/source/modules/vfs_recycle.c
@@ -603,7 +603,7 @@ done:
 	return rc;
 }
 
-int vfs_recycle_init(void)
-{
-	return smb_register_vfs("recycle", recycle_init, SMB_VFS_INTERFACE_VERSION);
+NTSTATUS vfs_recycle_init(void)
+{  
+	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "recycle", recycle_init);
 }
diff --git a/source/modules/weird.c b/source/modules/weird.c
index 377a68d5187..444853f3831 100644
--- a/source/modules/weird.c
+++ b/source/modules/weird.c
@@ -125,7 +125,7 @@ static size_t weird_push(void *cd, char **inbuf, size_t *inbytesleft,
 
 struct charset_functions weird_functions = {"WEIRD", weird_pull, weird_push};
 
-int charset_weird_init(void)
+NTSTATUS charset_weird_init(void)
 {
 	return smb_register_charset(&weird_functions);
 }
diff --git a/source/passdb/pdb_guest.c b/source/passdb/pdb_guest.c
index f5a15057e09..999779b0c6c 100644
--- a/source/passdb/pdb_guest.c
+++ b/source/passdb/pdb_guest.c
@@ -122,8 +122,8 @@ NTSTATUS pdb_init_guestsam(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method, c
 	return NT_STATUS_OK;
 }
 
-int pdb_guest_init(void)
+NTSTATUS pdb_guest_init(void)
 {
-    return smb_register_passdb("guest", pdb_init_guestsam, PASSDB_INTERFACE_VERSION);
+	return smb_register_passdb(PASSDB_INTERFACE_VERSION, "guest", pdb_init_guestsam);
 }
 
diff --git a/source/passdb/pdb_interface.c b/source/passdb/pdb_interface.c
index 57424bb2d8f..a8cc1f742af 100644
--- a/source/passdb/pdb_interface.c
+++ b/source/passdb/pdb_interface.c
@@ -36,18 +36,28 @@ static void lazy_initialize_passdb(void)
 
 static struct pdb_init_function_entry *pdb_find_backend_entry(const char *name);
 
-BOOL smb_register_passdb(const char *name, pdb_init_function init, int version) 
+NTSTATUS smb_register_passdb(uint16 version, const char *name, pdb_init_function init) 
 {
 	struct pdb_init_function_entry *entry = backends;
 
-	if(version != PASSDB_INTERFACE_VERSION)
-		return False;
+	if(version != PASSDB_INTERFACE_VERSION) {
+		DEBUG(0,("Can't register passdb backend!\n"
+			 "You tried to register a passdb module with PASSDB_INTERFACE_VERSION %d, "
+			 "while this version of samba uses version %d\n", 
+			 version,PASSDB_INTERFACE_VERSION));
+		return NT_STATUS_OBJECT_TYPE_MISMATCH;
+	}
+
+	if (!name || !init) {
+		return NT_STATUS_INVALID_PARAMETER;
+	}
 
 	DEBUG(5,("Attempting to register passdb backend %s\n", name));
 
+	/* Check for duplicates */
 	if (pdb_find_backend_entry(name)) {
 		DEBUG(0,("There already is a passdb backend registered with the name %s!\n", name));
-		return False;
+		return NT_STATUS_OBJECT_NAME_COLLISION;
 	}
 
 	entry = smb_xmalloc(sizeof(struct pdb_init_function_entry));
@@ -56,7 +66,7 @@ BOOL smb_register_passdb(const char *name, pdb_init_function init, int version)
 
 	DLIST_ADD(backends, entry);
 	DEBUG(5,("Successfully added passdb backend '%s'\n", name));
-	return True;
+	return NT_STATUS_OK;
 }
 
 static struct pdb_init_function_entry *pdb_find_backend_entry(const char *name)
@@ -426,7 +436,7 @@ static NTSTATUS make_pdb_methods_name(struct pdb_methods **methods, struct pdb_c
 	/* Try to find a module that contains this module */
 	if (!entry) { 
 		DEBUG(2,("No builtin backend found, trying to load plugin\n"));
-		if(smb_probe_module("pdb", module_name) && !(entry = pdb_find_backend_entry(module_name))) {
+		if(NT_STATUS_IS_OK(smb_probe_module("pdb", module_name)) && !(entry = pdb_find_backend_entry(module_name))) {
 			DEBUG(0,("Plugin is available, but doesn't register passdb backend %s\n", module_name));
 			SAFE_FREE(module_name);
 			return NT_STATUS_UNSUCCESSFUL;
@@ -439,7 +449,7 @@ static NTSTATUS make_pdb_methods_name(struct pdb_methods **methods, struct pdb_c
 		SAFE_FREE(module_name);
 		return NT_STATUS_INVALID_PARAMETER;
 	}
-	
+
 	DEBUG(5,("Found pdb backend %s\n", module_name));
 	nt_status = entry->init(context, methods, module_location);
 	if (NT_STATUS_IS_OK(nt_status)) {
diff --git a/source/passdb/pdb_ldap.c b/source/passdb/pdb_ldap.c
index a936fb298c9..bdbd5b265c7 100644
--- a/source/passdb/pdb_ldap.c
+++ b/source/passdb/pdb_ldap.c
@@ -3239,8 +3239,8 @@ static NTSTATUS pdb_init_ldapsam_nua(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb
 
 int pdb_ldap_init(void)
 {
-	smb_register_passdb("ldapsam", pdb_init_ldapsam, PASSDB_INTERFACE_VERSION);
-	smb_register_passdb("ldapsam_compat", pdb_init_ldapsam_compat, PASSDB_INTERFACE_VERSION);
-	smb_register_passdb("ldapsam_nua", pdb_init_ldapsam_nua, PASSDB_INTERFACE_VERSION);
+	smb_register_passdb(PASSDB_INTERFACE_VERSION, "ldapsam", pdb_init_ldapsam);
+	smb_register_passdb(PASSDB_INTERFACE_VERSION, "ldapsam_compat", pdb_init_ldapsam_compat);
+	smb_register_passdb(PASSDB_INTERFACE_VERSION, "ldapsam_nua", pdb_init_ldapsam_nua);
 	return True;
 }
diff --git a/source/passdb/pdb_mysql.c b/source/passdb/pdb_mysql.c
index ca1c239d73d..d3eb7cb975e 100644
--- a/source/passdb/pdb_mysql.c
+++ b/source/passdb/pdb_mysql.c
@@ -946,7 +946,7 @@ static NTSTATUS mysqlsam_init(struct pdb_context * pdb_context, struct pdb_metho
 	return NT_STATUS_OK;
 }
 
-int pdb_mysql_init(void) 
+NTSTATUS pdb_mysql_init(void) 
 {
-	return smb_register_passdb("mysql", mysqlsam_init, PASSDB_INTERFACE_VERSION);
+	return smb_register_passdb(PASSDB_INTERFACE_VERSION, "mysql", mysqlsam_init);
 }
diff --git a/source/passdb/pdb_nisplus.c b/source/passdb/pdb_nisplus.c
index 73d65af1c6f..cd9288fed03 100644
--- a/source/passdb/pdb_nisplus.c
+++ b/source/passdb/pdb_nisplus.c
@@ -1553,7 +1553,7 @@ NTSTATUS pdb_init_nisplussam (PDB_CONTEXT * pdb_context,
 	return NT_STATUS_OK;
 }
 
-int pdb_nisplus_init(void)
+NTSTATUS pdb_nisplus_init(void)
 {
-	return smb_register_passdb("nisplussam", pdb_init_nisplussam, PASSDB_INTERFACE_VERSION);
+	return smb_register_passdb(PASSDB_INTERFACE_VERSION, "nisplussam", pdb_init_nisplussam);
 }
diff --git a/source/passdb/pdb_smbpasswd.c b/source/passdb/pdb_smbpasswd.c
index 177621db1cd..cd66cf269c8 100644
--- a/source/passdb/pdb_smbpasswd.c
+++ b/source/passdb/pdb_smbpasswd.c
@@ -1580,9 +1580,9 @@ NTSTATUS pdb_init_smbpasswd_nua(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_meth
 	return NT_STATUS_OK;
 }
 
-int pdb_smbpasswd_init(void) 
+NTSTATUS pdb_smbpasswd_init(void) 
 {
-	smb_register_passdb("smbpasswd", pdb_init_smbpasswd, PASSDB_INTERFACE_VERSION);
-	smb_register_passdb("smbpasswd_nua", pdb_init_smbpasswd_nua, PASSDB_INTERFACE_VERSION);
-	return True;
+	smb_register_passdb(PASSDB_INTERFACE_VERSION, "smbpasswd", pdb_init_smbpasswd);
+	smb_register_passdb(PASSDB_INTERFACE_VERSION, "smbpasswd_nua", pdb_init_smbpasswd_nua);
+	return NT_STATUS_OK;
 }
diff --git a/source/passdb/pdb_tdb.c b/source/passdb/pdb_tdb.c
index 300b4e8f7db..c3538042ee1 100644
--- a/source/passdb/pdb_tdb.c
+++ b/source/passdb/pdb_tdb.c
@@ -990,10 +990,10 @@ NTSTATUS pdb_init_tdbsam_nua(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method,
 	return NT_STATUS_OK;
 }
 
-int pdb_tdbsam_init(void)
+NTSTATUS pdb_tdbsam_init(void)
 {
-    smb_register_passdb("tdbsam", pdb_init_tdbsam, PASSDB_INTERFACE_VERSION);
-    smb_register_passdb("tdbsam_nua", pdb_init_tdbsam_nua, PASSDB_INTERFACE_VERSION);
-	return True;
+	smb_register_passdb(PASSDB_INTERFACE_VERSION, "tdbsam", pdb_init_tdbsam);
+	smb_register_passdb(PASSDB_INTERFACE_VERSION, "tdbsam_nua", pdb_init_tdbsam_nua);
+	return NT_STATUS_OK;
 }
 
diff --git a/source/passdb/pdb_xml.c b/source/passdb/pdb_xml.c
index 24e871a24c2..de2ee4594c4 100644
--- a/source/passdb/pdb_xml.c
+++ b/source/passdb/pdb_xml.c
@@ -553,7 +553,7 @@ static NTSTATUS xmlsam_init(PDB_CONTEXT * pdb_context, PDB_METHODS ** pdb_method
 	return NT_STATUS_OK;
 }
 
-int pdb_xml_init(void) 
+NTSTATUS pdb_xml_init(void) 
 {
-	return smb_register_passdb("xml", xmlsam_init, PASSDB_INTERFACE_VERSION);
+	return smb_register_passdb(PASSDB_INTERFACE_VERSION, "xml", xmlsam_init);
 }
diff --git a/source/rpc_server/srv_dfs.c b/source/rpc_server/srv_dfs.c
index 0807efd550c..75a24174ea3 100644
--- a/source/rpc_server/srv_dfs.c
+++ b/source/rpc_server/srv_dfs.c
@@ -158,7 +158,7 @@ static BOOL api_dfs_enum(pipes_struct *p)
 \pipe\netdfs commands
 ********************************************************************/
 
-int rpc_dfs_init(void)
+NTSTATUS rpc_dfs_init(void)
 {
   struct api_struct api_netdfs_cmds[] =
     {
@@ -168,6 +168,6 @@ int rpc_dfs_init(void)
       {"DFS_GET_INFO",     DFS_GET_INFO,            api_dfs_get_info },
       {"DFS_ENUM",         DFS_ENUM,                api_dfs_enum     }
     };
-  return rpc_pipe_register_commands("netdfs", "netdfs", api_netdfs_cmds,
+  return rpc_pipe_register_commands(SMB_RPC_INTERFACE_VERSION, "netdfs", "netdfs", api_netdfs_cmds,
 				    sizeof(api_netdfs_cmds) / sizeof(struct api_struct));
 }
diff --git a/source/rpc_server/srv_echo.c b/source/rpc_server/srv_echo.c
index dcd8dd0c53b..166b6e939d2 100644
--- a/source/rpc_server/srv_echo.c
+++ b/source/rpc_server/srv_echo.c
@@ -120,7 +120,7 @@ static BOOL api_sink_data(pipes_struct *p)
 \pipe\rpcecho commands
 ********************************************************************/
 
-int rpc_echo_init(void)
+NTSTATUS rpc_echo_init(void)
 {
 	struct api_struct api_echo_cmds[] = {
 		{"ADD_ONE",       ECHO_ADD_ONE,     api_add_one },
@@ -129,7 +129,7 @@ int rpc_echo_init(void)
 		{"SINK_DATA",     ECHO_SINK_DATA,   api_sink_data },
 	};
 
-	return rpc_pipe_register_commands(
+	return rpc_pipe_register_commands(SMB_RPC_INTERFACE_VERSION,
 		"rpcecho", "rpcecho", api_echo_cmds,
 		sizeof(api_echo_cmds) / sizeof(struct api_struct));
 }
diff --git a/source/rpc_server/srv_lsa.c b/source/rpc_server/srv_lsa.c
index 8648213fdaa..384e8e90949 100644
--- a/source/rpc_server/srv_lsa.c
+++ b/source/rpc_server/srv_lsa.c
@@ -645,7 +645,7 @@ static BOOL api_lsa_query_info2(pipes_struct *p)
 /***************************************************************************
  \PIPE\ntlsa commands
  ***************************************************************************/
-int rpc_lsa_init(void)
+NTSTATUS rpc_lsa_init(void)
 {
 static const struct api_struct api_lsa_cmds[] =
 {
@@ -671,6 +671,6 @@ static const struct api_struct api_lsa_cmds[] =
 	{ "LSA_QUERYINFO2"      , LSA_QUERYINFO2      , api_lsa_query_info2      }
 };
 
-  return rpc_pipe_register_commands("lsarpc", "lsass", api_lsa_cmds, 
+  return rpc_pipe_register_commands(SMB_RPC_INTERFACE_VERSION, "lsarpc", "lsass", api_lsa_cmds, 
 				    sizeof(api_lsa_cmds) / sizeof(struct api_struct));
 }
diff --git a/source/rpc_server/srv_netlog.c b/source/rpc_server/srv_netlog.c
index 7dc0f57f34f..0cd40731774 100644
--- a/source/rpc_server/srv_netlog.c
+++ b/source/rpc_server/srv_netlog.c
@@ -321,7 +321,7 @@ static BOOL api_net_logon_ctrl(pipes_struct *p)
  array of \PIPE\NETLOGON operations
  ********************************************************************/
 
-int rpc_net_init(void)
+NTSTATUS rpc_net_init(void)
 {
   static struct api_struct api_net_cmds [] =
     {
@@ -336,6 +336,6 @@ int rpc_net_init(void)
       { "NET_LOGON_CTRL"    , NET_LOGON_CTRL    , api_net_logon_ctrl     }
     };
 
-  return rpc_pipe_register_commands("NETLOGON", "lsass", api_net_cmds,
+  return rpc_pipe_register_commands(SMB_RPC_INTERFACE_VERSION, "NETLOGON", "lsass", api_net_cmds,
 				    sizeof(api_net_cmds) / sizeof(struct api_struct));
 }
diff --git a/source/rpc_server/srv_pipe.c b/source/rpc_server/srv_pipe.c
index b09058629af..5b9d39ddc79 100644
--- a/source/rpc_server/srv_pipe.c
+++ b/source/rpc_server/srv_pipe.c
@@ -781,10 +781,28 @@ BOOL check_bind_req(char* pipe_name, RPC_IFACE* abstract,
 /*******************************************************************
  Register commands to an RPC pipe
 *******************************************************************/
-int rpc_pipe_register_commands(const char *clnt, const char *srv, const struct api_struct *cmds, int size)
+NTSTATUS rpc_pipe_register_commands(int version, const char *clnt, const char *srv, const struct api_struct *cmds, int size)
 {
         struct rpc_table *rpc_entry;
 
+	if (!clnt || !srv || !cmds) {
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if (version != SMB_RPC_INTERFACE_VERSION) {
+		DEBUG(0,("Can't register rpc commands!\n"
+			 "You tried to register a rpc module with SMB_RPC_INTERFACE_VERSION %d"
+			 ", while this version of samba uses version %d!\n", 
+			 version,SMB_RPC_INTERFACE_VERSION));
+		return NT_STATUS_OBJECT_TYPE_MISMATCH;
+	}
+
+	/* TODO: 
+	 *
+	 * we still need to make sure that don't register the same commands twice!!!
+	 * 
+	 * --metze
+	 */
 
         /* We use a temporary variable because this call can fail and 
            rpc_lookup will still be valid afterwards.  It could then succeed if
@@ -794,7 +812,7 @@ int rpc_pipe_register_commands(const char *clnt, const char *srv, const struct a
         if (NULL == rpc_entry) {
                 rpc_lookup_size--;
                 DEBUG(0, ("rpc_pipe_register_commands: memory allocation failed\n"));
-                return 0;
+                return NT_STATUS_NO_MEMORY;
         } else {
                 rpc_lookup = rpc_entry;
         }
@@ -810,7 +828,7 @@ int rpc_pipe_register_commands(const char *clnt, const char *srv, const struct a
                size * sizeof(struct api_struct));
         rpc_entry->n_cmds += size;
         
-        return size;
+        return NT_STATUS_OK;
 }
 
 /*******************************************************************
@@ -852,7 +870,7 @@ BOOL api_pipe_bind_req(pipes_struct *p, prs_struct *rpc_in_p)
 	}
 
 	if (i == rpc_lookup_size) {
-				if (!smb_probe_module("rpc", p->name)) {
+				if (NT_STATUS_IS_ERR(smb_probe_module("rpc", p->name))) {
                        DEBUG(3,("api_pipe_bind_req: Unknown pipe name %s in bind request.\n",
                                 p->name ));
                        if(!setup_bind_nak(p))
diff --git a/source/rpc_server/srv_reg.c b/source/rpc_server/srv_reg.c
index f72d8e4f295..43bb1ad86a1 100644
--- a/source/rpc_server/srv_reg.c
+++ b/source/rpc_server/srv_reg.c
@@ -373,7 +373,7 @@ static BOOL api_reg_save_key(pipes_struct *p)
  array of \PIPE\reg operations
  ********************************************************************/
 
-int rpc_reg_init(void)
+NTSTATUS rpc_reg_init(void)
 {
   static struct api_struct api_reg_cmds[] =
     {
@@ -391,6 +391,6 @@ int rpc_reg_init(void)
       { "REG_UNKNOWN_1A"         , REG_UNKNOWN_1A         , api_reg_unknown_1a       },
       { "REG_SAVE_KEY"           , REG_SAVE_KEY           , api_reg_save_key         }
     };
-  return rpc_pipe_register_commands("winreg", "winreg", api_reg_cmds,
+  return rpc_pipe_register_commands(SMB_RPC_INTERFACE_VERSION, "winreg", "winreg", api_reg_cmds,
 				    sizeof(api_reg_cmds) / sizeof(struct api_struct));
 }
diff --git a/source/rpc_server/srv_samr.c b/source/rpc_server/srv_samr.c
index 67c092775b9..9250b023d3b 100644
--- a/source/rpc_server/srv_samr.c
+++ b/source/rpc_server/srv_samr.c
@@ -1443,7 +1443,7 @@ static BOOL api_samr_set_dom_info(pipes_struct *p)
  array of \PIPE\samr operations
  ********************************************************************/
 
-int rpc_samr_init(void)
+NTSTATUS rpc_samr_init(void)
 {
   static struct api_struct api_samr_cmds [] =
     {
@@ -1501,6 +1501,6 @@ int rpc_samr_init(void)
       {"SAMR_SET_DOMAIN_INFO"   , SAMR_SET_DOMAIN_INFO  , api_samr_set_dom_info     },
       {"SAMR_CONNECT4"          , SAMR_CONNECT4         , api_samr_connect4         }
     };
-  return rpc_pipe_register_commands("samr", "lsass", api_samr_cmds,
+  return rpc_pipe_register_commands(SMB_RPC_INTERFACE_VERSION, "samr", "lsass", api_samr_cmds,
 				    sizeof(api_samr_cmds) / sizeof(struct api_struct));
 }
diff --git a/source/rpc_server/srv_spoolss.c b/source/rpc_server/srv_spoolss.c
index a7dd7a6cef5..3e9ed9e39f9 100755
--- a/source/rpc_server/srv_spoolss.c
+++ b/source/rpc_server/srv_spoolss.c
@@ -1580,7 +1580,7 @@ static BOOL api_spoolss_replycloseprinter(pipes_struct *p)
 \pipe\spoolss commands
 ********************************************************************/
 
-int rpc_spoolss_init(void)
+NTSTATUS rpc_spoolss_init(void)
 {
   struct api_struct api_spoolss_cmds[] = 
     {
@@ -1640,6 +1640,6 @@ int rpc_spoolss_init(void)
  {"SPOOLSS_REPLYCLOSEPRINTER",         SPOOLSS_REPLYCLOSEPRINTER,         api_spoolss_replycloseprinter         }
 #endif
     };
-  return rpc_pipe_register_commands("spoolss", "spoolss", api_spoolss_cmds,
+  return rpc_pipe_register_commands(SMB_RPC_INTERFACE_VERSION, "spoolss", "spoolss", api_spoolss_cmds,
 				    sizeof(api_spoolss_cmds) / sizeof(struct api_struct));
 }
diff --git a/source/rpc_server/srv_srvsvc.c b/source/rpc_server/srv_srvsvc.c
index 96820ae74bc..deba1224210 100644
--- a/source/rpc_server/srv_srvsvc.c
+++ b/source/rpc_server/srv_srvsvc.c
@@ -526,7 +526,7 @@ static BOOL api_srv_net_file_set_secdesc(pipes_struct *p)
 \PIPE\srvsvc commands
 ********************************************************************/
 
-int rpc_srv_init(void)
+NTSTATUS rpc_srv_init(void)
 {
   static const struct api_struct api_srv_cmds[] =
     {
@@ -548,6 +548,6 @@ int rpc_srv_init(void)
       { "SRV_NET_FILE_QUERY_SECDESC", SRV_NET_FILE_QUERY_SECDESC, api_srv_net_file_query_secdesc },
       { "SRV_NET_FILE_SET_SECDESC"  , SRV_NET_FILE_SET_SECDESC  , api_srv_net_file_set_secdesc   }
     };
-  return rpc_pipe_register_commands("srvsvc", "ntsvcs", api_srv_cmds,
+  return rpc_pipe_register_commands(SMB_RPC_INTERFACE_VERSION, "srvsvc", "ntsvcs", api_srv_cmds,
 				    sizeof(api_srv_cmds) / sizeof(struct api_struct));
 }
diff --git a/source/rpc_server/srv_wkssvc.c b/source/rpc_server/srv_wkssvc.c
index ddcbadd1d44..8efa29fd0bc 100644
--- a/source/rpc_server/srv_wkssvc.c
+++ b/source/rpc_server/srv_wkssvc.c
@@ -60,12 +60,12 @@ static BOOL api_wks_query_info(pipes_struct *p)
  \PIPE\wkssvc commands
  ********************************************************************/
 
-int rpc_wks_init(void)
+NTSTATUS rpc_wks_init(void)
 {
   static struct api_struct api_wks_cmds[] =
     {
       { "WKS_Q_QUERY_INFO", WKS_QUERY_INFO, api_wks_query_info }
     };
-  return rpc_pipe_register_commands("wkssvc", "ntsvcs", api_wks_cmds,
+  return rpc_pipe_register_commands(SMB_RPC_INTERFACE_VERSION, "wkssvc", "ntsvcs", api_wks_cmds,
 				    sizeof(api_wks_cmds) / sizeof(struct api_struct));
 }
diff --git a/source/smbd/vfs.c b/source/smbd/vfs.c
index 75bcb099173..e33a8ccbe73 100644
--- a/source/smbd/vfs.c
+++ b/source/smbd/vfs.c
@@ -153,29 +153,30 @@ static struct vfs_init_function_entry *vfs_find_backend_entry(const char *name)
    return NULL;
 }
 
-BOOL smb_register_vfs(const char *name, vfs_op_tuple *(*init)(const struct vfs_ops *, struct smb_vfs_handle_struct *), int version)
+NTSTATUS smb_register_vfs(uint16 version, const char *name, vfs_op_tuple *(*init)(const struct vfs_ops *, struct smb_vfs_handle_struct *))
 {
    struct vfs_init_function_entry *entry = backends;
-   
+
    if ((version < SMB_VFS_INTERFACE_CASCADED)) {
        DEBUG(0, ("vfs_init() returned wrong interface version info (was %d, should be no less than %d)\n",
            version, SMB_VFS_INTERFACE_VERSION ));
-       return False;
+       return NT_STATUS_OBJECT_TYPE_MISMATCH;
    }
   
    if ((version < SMB_VFS_INTERFACE_VERSION)) {
        DEBUG(0, ("Warning: vfs_init() states that module confirms interface version #%d, current interface version is #%d.\n\
 		Proceeding in compatibility mode, new operations (since version #%d) will fallback to default ones.\n",
 		version, SMB_VFS_INTERFACE_VERSION, version ));
-	   return False;
+	   return NT_STATUS_OBJECT_TYPE_MISMATCH;
+   }
+
+   if (!name || !init) {
+       return NT_STATUS_INVALID_PARAMETER;
    }
    
-   while(entry) {
-       if (strequal(entry->name, name)) {
+   if (vfs_find_backend_entry(name)) {
            DEBUG(0,("VFS module %s already loaded!\n", name));
-           return False;
-       }
-       entry = entry->next;
+           return NT_STATUS_OBJECT_NAME_COLLISION;
    }
 
    entry = smb_xmalloc(sizeof(struct vfs_init_function_entry));
@@ -184,7 +185,7 @@ BOOL smb_register_vfs(const char *name, vfs_op_tuple *(*init)(const struct vfs_o
 
    DLIST_ADD(backends, entry);
    DEBUG(5, ("Successfully added vfs backend '%s'\n", name));
-   return True;
+   return NT_STATUS_OK;
 }
 
 /****************************************************************************
@@ -267,7 +268,7 @@ BOOL vfs_init_custom(connection_struct *conn, const char *vfs_object)
 
 	/* First, try to load the module with the new module system */
 	if((entry = vfs_find_backend_entry(vfs_object)) || 
-	   (smb_probe_module("vfs", vfs_object) && 
+	   (NT_STATUS_IS_OK(smb_probe_module("vfs", vfs_object)) && 
 		(entry = vfs_find_backend_entry(vfs_object)))) {
 
 		DEBUG(3,("Successfully loaded %s with the new modules system\n", vfs_object));