Use the new modules system for passdb (merge from HEAD)

(This used to be commit 1755d5f66221a910863cfc8a197f8d792e6b6e3d)

9 files changed, 127 insertions, 79 deletions

diff --git a/source3/passdb/pdb_guest.c b/source3/passdb/pdb_guest.c
index 88a75aa667..f5a15057e0 100644
--- a/source3/passdb/pdb_guest.c
+++ b/source3/passdb/pdb_guest.c
@@ -122,3 +122,8 @@ NTSTATUS pdb_init_guestsam(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method, c
 	return NT_STATUS_OK;
 }
 
+int pdb_guest_init(void)
+{
+    return smb_register_passdb("guest", pdb_init_guestsam, PASSDB_INTERFACE_VERSION);
+}
+
diff --git a/source3/passdb/pdb_interface.c b/source3/passdb/pdb_interface.c
index 42be673d25..8adcd9dbfa 100644
--- a/source3/passdb/pdb_interface.c
+++ b/source3/passdb/pdb_interface.c
@@ -24,21 +24,57 @@
 #undef DBGC_CLASS
 #define DBGC_CLASS DBGC_PASSDB
 
-/** List of various built-in passdb modules */
-
-const struct pdb_init_function_entry builtin_pdb_init_functions[] = {
-	{ "smbpasswd", pdb_init_smbpasswd },
-	{ "smbpasswd_nua", pdb_init_smbpasswd_nua },
-	{ "tdbsam", pdb_init_tdbsam },
-	{ "tdbsam_nua", pdb_init_tdbsam_nua },
-	{ "ldapsam", pdb_init_ldapsam },
-	{ "ldapsam_nua", pdb_init_ldapsam_nua },
-	{ "unixsam", pdb_init_unixsam },
-	{ "guest", pdb_init_guestsam },
-	{ "nisplussam", pdb_init_nisplussam },
-	{ "plugin", pdb_init_plugin },
-	{ NULL, NULL}
-};
+static struct pdb_init_function_entry *backends = NULL;
+
+static void lazy_initialize_passdb(void)
+{
+	static BOOL initialized = False;
+	if(initialized)return;
+	static_init_pdb;
+	initialized = True;
+}
+
+BOOL smb_register_passdb(const char *name, pdb_init_function init, int version) 
+{
+	struct pdb_init_function_entry *entry = backends;
+
+	if(version != PASSDB_INTERFACE_VERSION)
+		return False;
+
+	DEBUG(5,("Attempting to register passdb backend %s\n", name));
+
+	/* Check for duplicates */
+	while(entry) { 
+		if(strcasecmp(name, entry->name) == 0) { 
+			DEBUG(0,("There already is a passdb backend registered with the name %s!\n", name));
+			return False;
+		}
+		entry = entry->next;
+	}
+
+	entry = smb_xmalloc(sizeof(struct pdb_init_function_entry));
+	entry->name = smb_xstrdup(name);
+	entry->init = init;
+
+	DLIST_ADD(backends, entry);
+	DEBUG(5,("Successfully added passdb backend '%s'\n", name));
+	return True;
+}
+
+static struct pdb_init_function_entry *pdb_find_backend_entry(const char *name)
+{
+	struct pdb_init_function_entry *entry = backends;
+	pstring stripped;
+
+	module_path_get_name(name, stripped);
+
+	while(entry) {
+		if (strequal(entry->name, stripped)) return entry;
+		entry = entry->next;
+	}
+
+	return NULL;
+}
 
 static NTSTATUS context_setsampwent(struct pdb_context *context, BOOL update)
 {
@@ -372,8 +408,10 @@ static NTSTATUS make_pdb_methods_name(struct pdb_methods **methods, struct pdb_c
 {
 	char *module_name = smb_xstrdup(selected);
 	char *module_location = NULL, *p;
+	struct pdb_init_function_entry *entry;
 	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
-	int i;
+
+	lazy_initialize_passdb();
 
 	p = strchr(module_name, ':');
 
@@ -385,27 +423,37 @@ static NTSTATUS make_pdb_methods_name(struct pdb_methods **methods, struct pdb_c
 
 	trim_string(module_name, " ", " ");
 
+
 	DEBUG(5,("Attempting to find an passdb backend to match %s (%s)\n", selected, module_name));
-	for (i = 0; builtin_pdb_init_functions[i].name; i++)
-	{
-		if (strequal(builtin_pdb_init_functions[i].name, module_name))
-		{
-			DEBUG(5,("Found pdb backend %s (at pos %d)\n", module_name, i));
-			nt_status = builtin_pdb_init_functions[i].init(context, methods, module_location);
-			if (NT_STATUS_IS_OK(nt_status)) {
-				DEBUG(5,("pdb backend %s has a valid init\n", selected));
-			} else {
-				DEBUG(0,("pdb backend %s did not correctly init (error was %s)\n", selected, nt_errstr(nt_status)));
-			}
+
+	entry = pdb_find_backend_entry(module_name);
+	
+	/* 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("passdb", 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;
-			break; /* unreached */
+			return NT_STATUS_UNSUCCESSFUL;
 		}
 	}
-
+	
 	/* No such backend found */
+	if(!entry) { 
+		DEBUG(0,("No builtin nor plugin backend for %s found\n", module_name));
+		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)) {
+		DEBUG(5,("pdb backend %s has a valid init\n", selected));
+	} else {
+		DEBUG(0,("pdb backend %s did not correctly init (error was %s)\n", selected, nt_errstr(nt_status)));
+	}
 	SAFE_FREE(module_name);
-	return NT_STATUS_INVALID_PARAMETER;
+	return nt_status;
 }
 
 /******************************************************************
diff --git a/source3/passdb/pdb_ldap.c b/source3/passdb/pdb_ldap.c
index 361cb8638a..a0853e2102 100644
--- a/source3/passdb/pdb_ldap.c
+++ b/source3/passdb/pdb_ldap.c
@@ -28,7 +28,6 @@
 #undef DBGC_CLASS
 #define DBGC_CLASS DBGC_PASSDB
 
-#ifdef HAVE_LDAP
 /* TODO:
 *  persistent connections: if using NSS LDAP, many connections are made
 *      however, using only one within Samba would be nice
@@ -2754,20 +2753,9 @@ NTSTATUS pdb_init_ldapsam_nua(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method
 	return NT_STATUS_OK;
 }
 
-
-#else
-
-NTSTATUS pdb_init_ldapsam(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method, const char *location)
-{
-	DEBUG(0, ("ldap not detected at configure time, ldapsam not availalble!\n"));
-	return NT_STATUS_UNSUCCESSFUL;
-}
-
-NTSTATUS pdb_init_ldapsam_nua(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method, const char *location)
+int pdb_ldap_init(void)
 {
-	DEBUG(0, ("ldap not dectected at configure time, ldapsam_nua not available!\n"));
-	return NT_STATUS_UNSUCCESSFUL;
+	smb_register_passdb("ldapsam", pdb_init_ldapsam, PASSDB_INTERFACE_VERSION);
+	smb_register_passdb("ldapsam_nua", pdb_init_ldapsam_nua, PASSDB_INTERFACE_VERSION);
+	return True;
 }
-
-
-#endif
diff --git a/source3/passdb/pdb_mysql.c b/source3/passdb/pdb_mysql.c
index d0f30c6394..8af16bd787 100644
--- a/source3/passdb/pdb_mysql.c
+++ b/source3/passdb/pdb_mysql.c
@@ -1,3 +1,4 @@
+
 /*
  * MySQL password backend for samba
  * Copyright (C) Jelmer Vernooij 2002
@@ -63,12 +64,10 @@ static int mysqlsam_debug_level = DBGC_ALL;
 #undef DBGC_CLASS
 #define DBGC_CLASS mysqlsam_debug_level
 
-PDB_MODULE_VERSIONING_MAGIC
-
 typedef struct pdb_mysql_data {
 	MYSQL *handle;
 	MYSQL_RES *pwent;
-	char *location;
+	const char *location;
 } pdb_mysql_data;
 
 /* Used to construct insert and update queries */
@@ -947,8 +946,8 @@ static NTSTATUS mysqlsam_enum_group_mapping(struct pdb_methods *methods,
 }
 
 
-NTSTATUS pdb_init(PDB_CONTEXT * pdb_context, PDB_METHODS ** pdb_method,
-		 char *location)
+static NTSTATUS mysqlsam_init(struct pdb_context * pdb_context, struct pdb_methods ** pdb_method,
+		 const char *location)
 {
 	NTSTATUS nt_status;
 	struct pdb_mysql_data *data;
@@ -1032,3 +1031,11 @@ NTSTATUS pdb_init(PDB_CONTEXT * pdb_context, PDB_METHODS ** pdb_method,
 
 	return NT_STATUS_OK;
 }
+
+int pdb_mysql_init() 
+{
+	if(smb_register_passdb("mysql", mysqlsam_init, PASSDB_INTERFACE_VERSION))
+		return 0;
+
+	return 1;
+}
diff --git a/source3/passdb/pdb_nisplus.c b/source3/passdb/pdb_nisplus.c
index 0a42c36ea0..73d65af1c6 100644
--- a/source3/passdb/pdb_nisplus.c
+++ b/source3/passdb/pdb_nisplus.c
@@ -24,8 +24,6 @@
 
 #include "includes.h"
 
-#ifdef WITH_NISPLUS_SAM
-
 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
 
 /*
@@ -1555,11 +1553,7 @@ NTSTATUS pdb_init_nisplussam (PDB_CONTEXT * pdb_context,
 	return NT_STATUS_OK;
 }
 
-#else
-NTSTATUS pdb_init_nisplussam (PDB_CONTEXT * c, PDB_METHODS ** m,
-			      const char *l)
+int pdb_nisplus_init(void)
 {
-	DEBUG (0, ("nisplus sam not compiled in!\n"));
-	return NT_STATUS_UNSUCCESSFUL;
+	return smb_register_passdb("nisplussam", pdb_init_nisplussam, PASSDB_INTERFACE_VERSION);
 }
-#endif /* WITH_NISPLUS_SAM */
diff --git a/source3/passdb/pdb_smbpasswd.c b/source3/passdb/pdb_smbpasswd.c
index b5a2bbbfe7..7f74196633 100644
--- a/source3/passdb/pdb_smbpasswd.c
+++ b/source3/passdb/pdb_smbpasswd.c
@@ -1579,3 +1579,10 @@ NTSTATUS pdb_init_smbpasswd_nua(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_meth
 
 	return NT_STATUS_OK;
 }
+
+int 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;
+}
diff --git a/source3/passdb/pdb_tdb.c b/source3/passdb/pdb_tdb.c
index c48c9567b1..7e2f4b832f 100644
--- a/source3/passdb/pdb_tdb.c
+++ b/source3/passdb/pdb_tdb.c
@@ -37,8 +37,6 @@ static int tdbsam_debug_level = DBGC_ALL;
 
 #endif
 
-#ifdef WITH_TDB_SAM
-
 #define PDB_VERSION		"20010830"
 #define PASSDB_FILE_NAME	"passdb.tdb"
 #define TDB_FORMAT_STRING	"ddddddBBBBBBBBBBBBddBBwdwdBdd"
@@ -988,20 +986,10 @@ NTSTATUS pdb_init_tdbsam_nua(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method,
 	return NT_STATUS_OK;
 }
 
-
-#else
-
-NTSTATUS pdb_init_tdbsam(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method, const char *location)
+int pdb_tdbsam_init(void)
 {
-	DEBUG(0, ("tdbsam not compiled in!\n"));
-	return NT_STATUS_UNSUCCESSFUL;
+    smb_register_passdb("tdbsam", pdb_init_tdbsam, PASSDB_INTERFACE_VERSION);
+    smb_register_passdb("tdbsam_nua", pdb_init_tdbsam_nua, PASSDB_INTERFACE_VERSION);
+	return True;
 }
 
-NTSTATUS pdb_init_tdbsam_nua(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method, const char *location)
-{
-	DEBUG(0, ("tdbsam_nua not compiled in!\n"));
-	return NT_STATUS_UNSUCCESSFUL;
-}
-
-
-#endif
diff --git a/source3/passdb/pdb_unix.c b/source3/passdb/pdb_unix.c
index 86a86d60d4..ed83024248 100644
--- a/source3/passdb/pdb_unix.c
+++ b/source3/passdb/pdb_unix.c
@@ -124,3 +124,8 @@ NTSTATUS pdb_init_unixsam(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method, co
 	/* There's not very much to initialise here */
 	return NT_STATUS_OK;
 }
+
+int pdb_unix_init(void)
+{
+	return smb_register_passdb("unixsam", pdb_init_unixsam, PASSDB_INTERFACE_VERSION);
+}
diff --git a/source3/passdb/pdb_xml.c b/source3/passdb/pdb_xml.c
index edf70250e2..add5b924b8 100644
--- a/source3/passdb/pdb_xml.c
+++ b/source3/passdb/pdb_xml.c
@@ -40,8 +40,6 @@ static int xmlsam_debug_level = DBGC_ALL;
 #undef DBGC_CLASS
 #define DBGC_CLASS xmlsam_debug_level
 
-PDB_MODULE_VERSIONING_MAGIC 
-
 static char * iota(int a) {
 	static char tmp[10];
 
@@ -514,7 +512,7 @@ static NTSTATUS xmlsam_add_sam_account(struct pdb_methods *methods, SAM_ACCOUNT
 	return NT_STATUS_OK;
 }
 
-NTSTATUS pdb_init(PDB_CONTEXT * pdb_context, PDB_METHODS ** pdb_method,
+NTSTATUS xmlsam_init(PDB_CONTEXT * pdb_context, PDB_METHODS ** pdb_method,
 		 const char *location)
 {
 	NTSTATUS nt_status;
@@ -565,3 +563,11 @@ NTSTATUS pdb_init(PDB_CONTEXT * pdb_context, PDB_METHODS ** pdb_method,
 
 	return NT_STATUS_OK;
 }
+
+int pdb_xml_init() 
+{
+	if(smb_register_passdb("xml", xmlsam_init, PASSDB_INTERFACE_VERSION))
+		return 0;
+
+	return 1;
+}