When a module's configuration is not loadable, we still load the module but it is not in a running state. When trying to troubleshoot, let's say, why chan_motif is ignoring inbound XMPP traffic, there is no way to indicate that a loaded module is not currently running. (closes issue ASTERISK-21108) Reported by: Rusty Newton Tested by: Michael L. Young Patches: asterisk-21108_add_status-v2.diff Michael L. Young (license 5026) Review: https://reviewboard.asterisk.org/r/2331/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@381749 65c4cc65-6c06-0410-ace0-fbb531ad65f3
1331 lines
35 KiB
C
1331 lines
35 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2006, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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* Kevin P. Fleming <kpfleming@digium.com>
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* Luigi Rizzo <rizzo@icir.org>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Module Loader
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* \author Mark Spencer <markster@digium.com>
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* \author Kevin P. Fleming <kpfleming@digium.com>
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* \author Luigi Rizzo <rizzo@icir.org>
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* - See ModMngMnt
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/_private.h"
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#include "asterisk/paths.h" /* use ast_config_AST_MODULE_DIR */
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#include <dirent.h>
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#include "asterisk/linkedlists.h"
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#include "asterisk/module.h"
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#include "asterisk/config.h"
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#include "asterisk/channel.h"
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#include "asterisk/term.h"
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#include "asterisk/acl.h"
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#include "asterisk/manager.h"
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#include "asterisk/cdr.h"
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#include "asterisk/enum.h"
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#include "asterisk/http.h"
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#include "asterisk/lock.h"
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#include "asterisk/features.h"
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#include "asterisk/dsp.h"
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#include "asterisk/udptl.h"
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#include "asterisk/heap.h"
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#include "asterisk/app.h"
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#include "asterisk/test.h"
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#include <dlfcn.h>
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#include "asterisk/md5.h"
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#include "asterisk/utils.h"
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/*** DOCUMENTATION
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***/
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#ifndef RTLD_NOW
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#define RTLD_NOW 0
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#endif
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#ifndef RTLD_LOCAL
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#define RTLD_LOCAL 0
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#endif
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struct ast_module_user {
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struct ast_channel *chan;
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AST_LIST_ENTRY(ast_module_user) entry;
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};
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AST_LIST_HEAD(module_user_list, ast_module_user);
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static const unsigned char expected_key[] =
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{ 0x87, 0x76, 0x79, 0x35, 0x23, 0xea, 0x3a, 0xd3,
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0x25, 0x2a, 0xbb, 0x35, 0x87, 0xe4, 0x22, 0x24 };
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static char buildopt_sum[33] = AST_BUILDOPT_SUM;
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static unsigned int embedding = 1; /* we always start out by registering embedded modules,
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since they are here before we dlopen() any
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*/
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struct ast_module {
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const struct ast_module_info *info;
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void *lib; /* the shared lib, or NULL if embedded */
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int usecount; /* the number of 'users' currently in this module */
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struct module_user_list users; /* the list of users in the module */
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struct {
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unsigned int running:1;
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unsigned int declined:1;
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} flags;
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AST_LIST_ENTRY(ast_module) entry;
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char resource[0];
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};
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static AST_LIST_HEAD_STATIC(module_list, ast_module);
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const char *ast_module_name(const struct ast_module *mod)
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{
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if (!mod || !mod->info) {
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return NULL;
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}
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return mod->info->name;
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}
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/*
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* module_list is cleared by its constructor possibly after
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* we start accumulating embedded modules, so we need to
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* use another list (without the lock) to accumulate them.
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* Then we update the main list when embedding is done.
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*/
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static struct module_list embedded_module_list;
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struct loadupdate {
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int (*updater)(void);
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AST_LIST_ENTRY(loadupdate) entry;
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};
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static AST_LIST_HEAD_STATIC(updaters, loadupdate);
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AST_MUTEX_DEFINE_STATIC(reloadlock);
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struct reload_queue_item {
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AST_LIST_ENTRY(reload_queue_item) entry;
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char module[0];
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};
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static int do_full_reload = 0;
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static AST_LIST_HEAD_STATIC(reload_queue, reload_queue_item);
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/* when dynamic modules are being loaded, ast_module_register() will
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need to know what filename the module was loaded from while it
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is being registered
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*/
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static struct ast_module *resource_being_loaded;
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/* XXX: should we check for duplicate resource names here? */
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void ast_module_register(const struct ast_module_info *info)
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{
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struct ast_module *mod;
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if (embedding) {
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if (!(mod = ast_calloc(1, sizeof(*mod) + strlen(info->name) + 1)))
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return;
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strcpy(mod->resource, info->name);
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} else {
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mod = resource_being_loaded;
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}
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mod->info = info;
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AST_LIST_HEAD_INIT(&mod->users);
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/* during startup, before the loader has been initialized,
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there are no threads, so there is no need to take the lock
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on this list to manipulate it. it is also possible that it
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might be unsafe to use the list lock at that point... so
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let's avoid it altogether
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*/
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if (embedding) {
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AST_LIST_INSERT_TAIL(&embedded_module_list, mod, entry);
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} else {
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AST_LIST_LOCK(&module_list);
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/* it is paramount that the new entry be placed at the tail of
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the list, otherwise the code that uses dlopen() to load
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dynamic modules won't be able to find out if the module it
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just opened was registered or failed to load
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*/
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AST_LIST_INSERT_TAIL(&module_list, mod, entry);
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AST_LIST_UNLOCK(&module_list);
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}
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/* give the module a copy of its own handle, for later use in registrations and the like */
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*((struct ast_module **) &(info->self)) = mod;
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}
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void ast_module_unregister(const struct ast_module_info *info)
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{
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struct ast_module *mod = NULL;
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/* it is assumed that the users list in the module structure
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will already be empty, or we cannot have gotten to this
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point
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*/
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AST_LIST_LOCK(&module_list);
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AST_LIST_TRAVERSE_SAFE_BEGIN(&module_list, mod, entry) {
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if (mod->info == info) {
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AST_LIST_REMOVE_CURRENT(entry);
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break;
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}
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}
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AST_LIST_TRAVERSE_SAFE_END;
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AST_LIST_UNLOCK(&module_list);
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if (mod) {
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AST_LIST_HEAD_DESTROY(&mod->users);
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ast_free(mod);
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}
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}
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struct ast_module_user *__ast_module_user_add(struct ast_module *mod, struct ast_channel *chan)
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{
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struct ast_module_user *u;
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u = ast_calloc(1, sizeof(*u));
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if (!u) {
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return NULL;
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}
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u->chan = chan;
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AST_LIST_LOCK(&mod->users);
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AST_LIST_INSERT_HEAD(&mod->users, u, entry);
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AST_LIST_UNLOCK(&mod->users);
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ast_atomic_fetchadd_int(&mod->usecount, +1);
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ast_update_use_count();
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return u;
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}
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void __ast_module_user_remove(struct ast_module *mod, struct ast_module_user *u)
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{
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if (!u) {
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return;
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}
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AST_LIST_LOCK(&mod->users);
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u = AST_LIST_REMOVE(&mod->users, u, entry);
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AST_LIST_UNLOCK(&mod->users);
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if (!u) {
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/*
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* Was not in the list. Either a bad pointer or
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* __ast_module_user_hangup_all() has been called.
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*/
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return;
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}
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ast_atomic_fetchadd_int(&mod->usecount, -1);
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ast_free(u);
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ast_update_use_count();
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}
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void __ast_module_user_hangup_all(struct ast_module *mod)
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{
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struct ast_module_user *u;
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AST_LIST_LOCK(&mod->users);
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while ((u = AST_LIST_REMOVE_HEAD(&mod->users, entry))) {
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if (u->chan) {
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ast_softhangup(u->chan, AST_SOFTHANGUP_APPUNLOAD);
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}
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ast_atomic_fetchadd_int(&mod->usecount, -1);
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ast_free(u);
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}
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AST_LIST_UNLOCK(&mod->users);
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ast_update_use_count();
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}
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/*! \note
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* In addition to modules, the reload command handles some extra keywords
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* which are listed here together with the corresponding handlers.
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* This table is also used by the command completion code.
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*/
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static struct reload_classes {
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const char *name;
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int (*reload_fn)(void);
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} reload_classes[] = { /* list in alpha order, longest match first for cli completion */
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{ "cdr", ast_cdr_engine_reload },
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{ "dnsmgr", dnsmgr_reload },
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{ "extconfig", read_config_maps },
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{ "enum", ast_enum_reload },
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{ "acl", ast_named_acl_reload },
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{ "manager", reload_manager },
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{ "http", ast_http_reload },
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{ "logger", logger_reload },
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{ "features", ast_features_reload },
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{ "dsp", ast_dsp_reload},
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{ "udptl", ast_udptl_reload },
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{ "indications", ast_indications_reload },
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{ "cel", ast_cel_engine_reload },
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{ "plc", ast_plc_reload },
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{ NULL, NULL }
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};
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static int printdigest(const unsigned char *d)
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{
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int x, pos;
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char buf[256]; /* large enough so we don't have to worry */
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for (pos = 0, x = 0; x < 16; x++)
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pos += sprintf(buf + pos, " %02x", *d++);
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ast_debug(1, "Unexpected signature:%s\n", buf);
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return 0;
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}
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static int key_matches(const unsigned char *key1, const unsigned char *key2)
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{
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int x;
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for (x = 0; x < 16; x++) {
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if (key1[x] != key2[x])
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return 0;
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}
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return 1;
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}
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static int verify_key(const unsigned char *key)
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{
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struct MD5Context c;
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unsigned char digest[16];
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MD5Init(&c);
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MD5Update(&c, key, strlen((char *)key));
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MD5Final(digest, &c);
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if (key_matches(expected_key, digest))
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return 0;
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printdigest(digest);
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return -1;
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}
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|
static int resource_name_match(const char *name1_in, const char *name2_in)
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|
{
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|
char *name1 = (char *) name1_in;
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|
char *name2 = (char *) name2_in;
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|
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/* trim off any .so extensions */
|
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if (!strcasecmp(name1 + strlen(name1) - 3, ".so")) {
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name1 = ast_strdupa(name1);
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name1[strlen(name1) - 3] = '\0';
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}
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if (!strcasecmp(name2 + strlen(name2) - 3, ".so")) {
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name2 = ast_strdupa(name2);
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name2[strlen(name2) - 3] = '\0';
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}
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return strcasecmp(name1, name2);
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}
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static struct ast_module *find_resource(const char *resource, int do_lock)
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{
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struct ast_module *cur;
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if (do_lock)
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AST_LIST_LOCK(&module_list);
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AST_LIST_TRAVERSE(&module_list, cur, entry) {
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if (!resource_name_match(resource, cur->resource))
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break;
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}
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if (do_lock)
|
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AST_LIST_UNLOCK(&module_list);
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return cur;
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}
|
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|
|
#ifdef LOADABLE_MODULES
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static void unload_dynamic_module(struct ast_module *mod)
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{
|
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void *lib = mod->lib;
|
|
|
|
/* WARNING: the structure pointed to by mod is going to
|
|
disappear when this operation succeeds, so we can't
|
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dereference it */
|
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|
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if (lib)
|
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while (!dlclose(lib));
|
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}
|
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|
|
static enum ast_module_load_result load_resource(const char *resource_name, unsigned int global_symbols_only, struct ast_heap *resource_heap, int required);
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|
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static struct ast_module *load_dynamic_module(const char *resource_in, unsigned int global_symbols_only, struct ast_heap *resource_heap)
|
|
{
|
|
char fn[PATH_MAX] = "";
|
|
void *lib = NULL;
|
|
struct ast_module *mod;
|
|
unsigned int wants_global;
|
|
int space; /* room needed for the descriptor */
|
|
int missing_so = 0;
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|
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space = sizeof(*resource_being_loaded) + strlen(resource_in) + 1;
|
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if (strcasecmp(resource_in + strlen(resource_in) - 3, ".so")) {
|
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missing_so = 1;
|
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space += 3; /* room for the extra ".so" */
|
|
}
|
|
|
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snprintf(fn, sizeof(fn), "%s/%s%s", ast_config_AST_MODULE_DIR, resource_in, missing_so ? ".so" : "");
|
|
|
|
/* make a first load of the module in 'quiet' mode... don't try to resolve
|
|
any symbols, and don't export any symbols. this will allow us to peek into
|
|
the module's info block (if available) to see what flags it has set */
|
|
|
|
resource_being_loaded = ast_calloc(1, space);
|
|
if (!resource_being_loaded)
|
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return NULL;
|
|
strcpy(resource_being_loaded->resource, resource_in);
|
|
if (missing_so)
|
|
strcat(resource_being_loaded->resource, ".so");
|
|
|
|
if (!(lib = dlopen(fn, RTLD_LAZY | RTLD_LOCAL))) {
|
|
ast_log(LOG_WARNING, "Error loading module '%s': %s\n", resource_in, dlerror());
|
|
ast_free(resource_being_loaded);
|
|
return NULL;
|
|
}
|
|
|
|
/* the dlopen() succeeded, let's find out if the module
|
|
registered itself */
|
|
/* note that this will only work properly as long as
|
|
ast_module_register() (which is called by the module's
|
|
constructor) places the new module at the tail of the
|
|
module_list
|
|
*/
|
|
if (resource_being_loaded != (mod = AST_LIST_LAST(&module_list))) {
|
|
ast_log(LOG_WARNING, "Module '%s' did not register itself during load\n", resource_in);
|
|
/* no, it did not, so close it and return */
|
|
while (!dlclose(lib));
|
|
/* note that the module's destructor will call ast_module_unregister(),
|
|
which will free the structure we allocated in resource_being_loaded */
|
|
return NULL;
|
|
}
|
|
|
|
wants_global = ast_test_flag(mod->info, AST_MODFLAG_GLOBAL_SYMBOLS);
|
|
|
|
/* if we are being asked only to load modules that provide global symbols,
|
|
and this one does not, then close it and return */
|
|
if (global_symbols_only && !wants_global) {
|
|
while (!dlclose(lib));
|
|
return NULL;
|
|
}
|
|
|
|
/* This section is a workaround for a gcc 4.1 bug that has already been
|
|
* fixed in later versions. Unfortunately, some distributions, such as
|
|
* RHEL/CentOS 5, distribute gcc 4.1, so we're stuck with having to deal
|
|
* with this issue. This basically ensures that optional_api modules are
|
|
* loaded before any module which requires their functionality. */
|
|
#if !defined(HAVE_ATTRIBUTE_weak_import) && !defined(HAVE_ATTRIBUTE_weakref)
|
|
if (!ast_strlen_zero(mod->info->nonoptreq)) {
|
|
/* Force any required dependencies to load */
|
|
char *each, *required_resource = ast_strdupa(mod->info->nonoptreq);
|
|
while ((each = strsep(&required_resource, ","))) {
|
|
struct ast_module *dependency;
|
|
each = ast_strip(each);
|
|
dependency = find_resource(each, 0);
|
|
/* Is it already loaded? */
|
|
if (!dependency) {
|
|
load_resource(each, global_symbols_only, resource_heap, 1);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
while (!dlclose(lib));
|
|
resource_being_loaded = NULL;
|
|
|
|
/* start the load process again */
|
|
resource_being_loaded = ast_calloc(1, space);
|
|
if (!resource_being_loaded)
|
|
return NULL;
|
|
strcpy(resource_being_loaded->resource, resource_in);
|
|
if (missing_so)
|
|
strcat(resource_being_loaded->resource, ".so");
|
|
|
|
if (!(lib = dlopen(fn, wants_global ? RTLD_LAZY | RTLD_GLOBAL : RTLD_NOW | RTLD_LOCAL))) {
|
|
ast_log(LOG_WARNING, "Error loading module '%s': %s\n", resource_in, dlerror());
|
|
ast_free(resource_being_loaded);
|
|
return NULL;
|
|
}
|
|
|
|
/* since the module was successfully opened, and it registered itself
|
|
the previous time we did that, we're going to assume it worked this
|
|
time too :) */
|
|
|
|
AST_LIST_LAST(&module_list)->lib = lib;
|
|
resource_being_loaded = NULL;
|
|
|
|
return AST_LIST_LAST(&module_list);
|
|
}
|
|
#endif
|
|
|
|
void ast_module_shutdown(void)
|
|
{
|
|
struct ast_module *mod;
|
|
int somethingchanged = 1, final = 0;
|
|
|
|
AST_LIST_LOCK(&module_list);
|
|
|
|
/*!\note Some resources, like timers, are started up dynamically, and thus
|
|
* may be still in use, even if all channels are dead. We must therefore
|
|
* check the usecount before asking modules to unload. */
|
|
do {
|
|
if (!somethingchanged) {
|
|
/*!\note If we go through the entire list without changing
|
|
* anything, ignore the usecounts and unload, then exit. */
|
|
final = 1;
|
|
}
|
|
|
|
/* Reset flag before traversing the list */
|
|
somethingchanged = 0;
|
|
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&module_list, mod, entry) {
|
|
if (!final && mod->usecount) {
|
|
continue;
|
|
}
|
|
AST_LIST_REMOVE_CURRENT(entry);
|
|
if (mod->flags.running && !mod->flags.declined && mod->info->unload) {
|
|
mod->info->unload();
|
|
}
|
|
AST_LIST_HEAD_DESTROY(&mod->users);
|
|
free(mod);
|
|
somethingchanged = 1;
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
} while (somethingchanged && !final);
|
|
|
|
AST_LIST_UNLOCK(&module_list);
|
|
}
|
|
|
|
int ast_unload_resource(const char *resource_name, enum ast_module_unload_mode force)
|
|
{
|
|
struct ast_module *mod;
|
|
int res = -1;
|
|
int error = 0;
|
|
|
|
AST_LIST_LOCK(&module_list);
|
|
|
|
if (!(mod = find_resource(resource_name, 0))) {
|
|
AST_LIST_UNLOCK(&module_list);
|
|
ast_log(LOG_WARNING, "Unload failed, '%s' could not be found\n", resource_name);
|
|
return -1;
|
|
}
|
|
|
|
if (!mod->flags.running || mod->flags.declined) {
|
|
ast_log(LOG_WARNING, "Unload failed, '%s' is not loaded.\n", resource_name);
|
|
error = 1;
|
|
}
|
|
|
|
if (!error && (mod->usecount > 0)) {
|
|
if (force)
|
|
ast_log(LOG_WARNING, "Warning: Forcing removal of module '%s' with use count %d\n",
|
|
resource_name, mod->usecount);
|
|
else {
|
|
ast_log(LOG_WARNING, "Soft unload failed, '%s' has use count %d\n", resource_name,
|
|
mod->usecount);
|
|
error = 1;
|
|
}
|
|
}
|
|
|
|
if (!error) {
|
|
/* Request any channels attached to the module to hangup. */
|
|
__ast_module_user_hangup_all(mod);
|
|
|
|
res = mod->info->unload();
|
|
if (res) {
|
|
ast_log(LOG_WARNING, "Firm unload failed for %s\n", resource_name);
|
|
if (force <= AST_FORCE_FIRM) {
|
|
error = 1;
|
|
} else {
|
|
ast_log(LOG_WARNING, "** Dangerous **: Unloading resource anyway, at user request\n");
|
|
}
|
|
}
|
|
|
|
if (!error) {
|
|
/*
|
|
* Request hangup on any channels that managed to get attached
|
|
* while we called the module unload function.
|
|
*/
|
|
__ast_module_user_hangup_all(mod);
|
|
sched_yield();
|
|
}
|
|
}
|
|
|
|
if (!error)
|
|
mod->flags.running = mod->flags.declined = 0;
|
|
|
|
AST_LIST_UNLOCK(&module_list);
|
|
|
|
if (!error && !mod->lib && mod->info && mod->info->restore_globals)
|
|
mod->info->restore_globals();
|
|
|
|
#ifdef LOADABLE_MODULES
|
|
if (!error) {
|
|
unload_dynamic_module(mod);
|
|
ast_test_suite_event_notify("MODULE_UNLOAD", "Message: %s", resource_name);
|
|
}
|
|
#endif
|
|
|
|
if (!error)
|
|
ast_update_use_count();
|
|
|
|
return res;
|
|
}
|
|
|
|
char *ast_module_helper(const char *line, const char *word, int pos, int state, int rpos, int needsreload)
|
|
{
|
|
struct ast_module *cur;
|
|
int i, which=0, l = strlen(word);
|
|
char *ret = NULL;
|
|
|
|
if (pos != rpos)
|
|
return NULL;
|
|
|
|
AST_LIST_LOCK(&module_list);
|
|
AST_LIST_TRAVERSE(&module_list, cur, entry) {
|
|
if (!strncasecmp(word, cur->resource, l) &&
|
|
(cur->info->reload || !needsreload) &&
|
|
++which > state) {
|
|
ret = ast_strdup(cur->resource);
|
|
break;
|
|
}
|
|
}
|
|
AST_LIST_UNLOCK(&module_list);
|
|
|
|
if (!ret) {
|
|
for (i=0; !ret && reload_classes[i].name; i++) {
|
|
if (!strncasecmp(word, reload_classes[i].name, l) && ++which > state)
|
|
ret = ast_strdup(reload_classes[i].name);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void ast_process_pending_reloads(void)
|
|
{
|
|
struct reload_queue_item *item;
|
|
|
|
if (!ast_fully_booted) {
|
|
return;
|
|
}
|
|
|
|
AST_LIST_LOCK(&reload_queue);
|
|
|
|
if (do_full_reload) {
|
|
do_full_reload = 0;
|
|
AST_LIST_UNLOCK(&reload_queue);
|
|
ast_log(LOG_NOTICE, "Executing deferred reload request.\n");
|
|
ast_module_reload(NULL);
|
|
return;
|
|
}
|
|
|
|
while ((item = AST_LIST_REMOVE_HEAD(&reload_queue, entry))) {
|
|
ast_log(LOG_NOTICE, "Executing deferred reload request for module '%s'.\n", item->module);
|
|
ast_module_reload(item->module);
|
|
ast_free(item);
|
|
}
|
|
|
|
AST_LIST_UNLOCK(&reload_queue);
|
|
}
|
|
|
|
static void queue_reload_request(const char *module)
|
|
{
|
|
struct reload_queue_item *item;
|
|
|
|
AST_LIST_LOCK(&reload_queue);
|
|
|
|
if (do_full_reload) {
|
|
AST_LIST_UNLOCK(&reload_queue);
|
|
return;
|
|
}
|
|
|
|
if (ast_strlen_zero(module)) {
|
|
/* A full reload request (when module is NULL) wipes out any previous
|
|
reload requests and causes the queue to ignore future ones */
|
|
while ((item = AST_LIST_REMOVE_HEAD(&reload_queue, entry))) {
|
|
ast_free(item);
|
|
}
|
|
do_full_reload = 1;
|
|
} else {
|
|
/* No reason to add the same module twice */
|
|
AST_LIST_TRAVERSE(&reload_queue, item, entry) {
|
|
if (!strcasecmp(item->module, module)) {
|
|
AST_LIST_UNLOCK(&reload_queue);
|
|
return;
|
|
}
|
|
}
|
|
item = ast_calloc(1, sizeof(*item) + strlen(module) + 1);
|
|
if (!item) {
|
|
ast_log(LOG_ERROR, "Failed to allocate reload queue item.\n");
|
|
AST_LIST_UNLOCK(&reload_queue);
|
|
return;
|
|
}
|
|
strcpy(item->module, module);
|
|
AST_LIST_INSERT_TAIL(&reload_queue, item, entry);
|
|
}
|
|
AST_LIST_UNLOCK(&reload_queue);
|
|
}
|
|
|
|
int ast_module_reload(const char *name)
|
|
{
|
|
struct ast_module *cur;
|
|
int res = 0; /* return value. 0 = not found, others, see below */
|
|
int i;
|
|
|
|
/* If we aren't fully booted, we just pretend we reloaded but we queue this
|
|
up to run once we are booted up. */
|
|
if (!ast_fully_booted) {
|
|
queue_reload_request(name);
|
|
return 0;
|
|
}
|
|
|
|
if (ast_mutex_trylock(&reloadlock)) {
|
|
ast_verbose("The previous reload command didn't finish yet\n");
|
|
return -1; /* reload already in progress */
|
|
}
|
|
ast_lastreloadtime = ast_tvnow();
|
|
|
|
if (ast_opt_lock_confdir) {
|
|
int try;
|
|
int res;
|
|
for (try = 1, res = AST_LOCK_TIMEOUT; try < 6 && (res == AST_LOCK_TIMEOUT); try++) {
|
|
res = ast_lock_path(ast_config_AST_CONFIG_DIR);
|
|
if (res == AST_LOCK_TIMEOUT) {
|
|
ast_log(LOG_WARNING, "Failed to grab lock on %s, try %d\n", ast_config_AST_CONFIG_DIR, try);
|
|
}
|
|
}
|
|
if (res != AST_LOCK_SUCCESS) {
|
|
ast_verbose("Cannot grab lock on %s\n", ast_config_AST_CONFIG_DIR);
|
|
ast_mutex_unlock(&reloadlock);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* Call "predefined" reload here first */
|
|
for (i = 0; reload_classes[i].name; i++) {
|
|
if (!name || !strcasecmp(name, reload_classes[i].name)) {
|
|
if (!reload_classes[i].reload_fn()) {
|
|
ast_test_suite_event_notify("MODULE_RELOAD", "Message: %s", name);
|
|
}
|
|
res = 2; /* found and reloaded */
|
|
}
|
|
}
|
|
|
|
if (name && res) {
|
|
if (ast_opt_lock_confdir) {
|
|
ast_unlock_path(ast_config_AST_CONFIG_DIR);
|
|
}
|
|
ast_mutex_unlock(&reloadlock);
|
|
return res;
|
|
}
|
|
|
|
AST_LIST_LOCK(&module_list);
|
|
AST_LIST_TRAVERSE(&module_list, cur, entry) {
|
|
const struct ast_module_info *info = cur->info;
|
|
|
|
if (name && resource_name_match(name, cur->resource))
|
|
continue;
|
|
|
|
if (!cur->flags.running || cur->flags.declined) {
|
|
if (!name)
|
|
continue;
|
|
ast_log(LOG_NOTICE, "The module '%s' was not properly initialized. "
|
|
"Before reloading the module, you must run \"module load %s\" "
|
|
"and fix whatever is preventing the module from being initialized.\n",
|
|
name, name);
|
|
res = 2; /* Don't report that the module was not found */
|
|
break;
|
|
}
|
|
|
|
if (!info->reload) { /* cannot be reloaded */
|
|
/* Nothing to reload, so reload is successful */
|
|
ast_test_suite_event_notify("MODULE_RELOAD", "Message: %s", cur->resource);
|
|
if (res < 1) /* store result if possible */
|
|
res = 1; /* 1 = no reload() method */
|
|
continue;
|
|
}
|
|
|
|
res = 2;
|
|
ast_verb(3, "Reloading module '%s' (%s)\n", cur->resource, info->description);
|
|
if (!info->reload()) {
|
|
ast_test_suite_event_notify("MODULE_RELOAD", "Message: %s", cur->resource);
|
|
}
|
|
}
|
|
AST_LIST_UNLOCK(&module_list);
|
|
|
|
if (ast_opt_lock_confdir) {
|
|
ast_unlock_path(ast_config_AST_CONFIG_DIR);
|
|
}
|
|
ast_mutex_unlock(&reloadlock);
|
|
|
|
return res;
|
|
}
|
|
|
|
static unsigned int inspect_module(const struct ast_module *mod)
|
|
{
|
|
if (!mod->info->description) {
|
|
ast_log(LOG_WARNING, "Module '%s' does not provide a description.\n", mod->resource);
|
|
return 1;
|
|
}
|
|
|
|
if (!mod->info->key) {
|
|
ast_log(LOG_WARNING, "Module '%s' does not provide a license key.\n", mod->resource);
|
|
return 1;
|
|
}
|
|
|
|
if (verify_key((unsigned char *) mod->info->key)) {
|
|
ast_log(LOG_WARNING, "Module '%s' did not provide a valid license key.\n", mod->resource);
|
|
return 1;
|
|
}
|
|
|
|
if (!ast_strlen_zero(mod->info->buildopt_sum) &&
|
|
strcmp(buildopt_sum, mod->info->buildopt_sum)) {
|
|
ast_log(LOG_WARNING, "Module '%s' was not compiled with the same compile-time options as this version of Asterisk.\n", mod->resource);
|
|
ast_log(LOG_WARNING, "Module '%s' will not be initialized as it may cause instability.\n", mod->resource);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum ast_module_load_result start_resource(struct ast_module *mod)
|
|
{
|
|
char tmp[256];
|
|
enum ast_module_load_result res;
|
|
|
|
if (mod->flags.running) {
|
|
return AST_MODULE_LOAD_SUCCESS;
|
|
}
|
|
|
|
if (!mod->info->load) {
|
|
return AST_MODULE_LOAD_FAILURE;
|
|
}
|
|
|
|
res = mod->info->load();
|
|
|
|
switch (res) {
|
|
case AST_MODULE_LOAD_SUCCESS:
|
|
if (!ast_fully_booted) {
|
|
ast_verb(1, "%s => (%s)\n", mod->resource, term_color(tmp, mod->info->description, COLOR_BROWN, COLOR_BLACK, sizeof(tmp)));
|
|
if (ast_opt_console && !option_verbose) {
|
|
/* This never looks good on anything but the root console, so
|
|
* it's best not to try to funnel it through the logger. */
|
|
fprintf(stdout, ".");
|
|
}
|
|
} else {
|
|
ast_verb(1, "Loaded %s => (%s)\n", mod->resource, mod->info->description);
|
|
}
|
|
|
|
mod->flags.running = 1;
|
|
|
|
ast_update_use_count();
|
|
break;
|
|
case AST_MODULE_LOAD_DECLINE:
|
|
mod->flags.declined = 1;
|
|
break;
|
|
case AST_MODULE_LOAD_FAILURE:
|
|
case AST_MODULE_LOAD_SKIP: /* modules should never return this value */
|
|
case AST_MODULE_LOAD_PRIORITY:
|
|
break;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/*! loads a resource based upon resource_name. If global_symbols_only is set
|
|
* only modules with global symbols will be loaded.
|
|
*
|
|
* If the ast_heap is provided (not NULL) the module is found and added to the
|
|
* heap without running the module's load() function. By doing this, modules
|
|
* added to the resource_heap can be initialized later in order by priority.
|
|
*
|
|
* If the ast_heap is not provided, the module's load function will be executed
|
|
* immediately */
|
|
static enum ast_module_load_result load_resource(const char *resource_name, unsigned int global_symbols_only, struct ast_heap *resource_heap, int required)
|
|
{
|
|
struct ast_module *mod;
|
|
enum ast_module_load_result res = AST_MODULE_LOAD_SUCCESS;
|
|
|
|
if ((mod = find_resource(resource_name, 0))) {
|
|
if (mod->flags.running) {
|
|
ast_log(LOG_WARNING, "Module '%s' already exists.\n", resource_name);
|
|
return AST_MODULE_LOAD_DECLINE;
|
|
}
|
|
if (global_symbols_only && !ast_test_flag(mod->info, AST_MODFLAG_GLOBAL_SYMBOLS))
|
|
return AST_MODULE_LOAD_SKIP;
|
|
} else {
|
|
#ifdef LOADABLE_MODULES
|
|
if (!(mod = load_dynamic_module(resource_name, global_symbols_only, resource_heap))) {
|
|
/* don't generate a warning message during load_modules() */
|
|
if (!global_symbols_only) {
|
|
ast_log(LOG_WARNING, "Module '%s' could not be loaded.\n", resource_name);
|
|
return required ? AST_MODULE_LOAD_FAILURE : AST_MODULE_LOAD_DECLINE;
|
|
} else {
|
|
return required ? AST_MODULE_LOAD_FAILURE : AST_MODULE_LOAD_SKIP;
|
|
}
|
|
}
|
|
#else
|
|
ast_log(LOG_WARNING, "Module support is not available. Module '%s' could not be loaded.\n", resource_name);
|
|
return required ? AST_MODULE_LOAD_FAILURE : AST_MODULE_LOAD_DECLINE;
|
|
#endif
|
|
}
|
|
|
|
if (inspect_module(mod)) {
|
|
ast_log(LOG_WARNING, "Module '%s' could not be loaded.\n", resource_name);
|
|
#ifdef LOADABLE_MODULES
|
|
unload_dynamic_module(mod);
|
|
#endif
|
|
return required ? AST_MODULE_LOAD_FAILURE : AST_MODULE_LOAD_DECLINE;
|
|
}
|
|
|
|
if (!mod->lib && mod->info->backup_globals && mod->info->backup_globals()) {
|
|
ast_log(LOG_WARNING, "Module '%s' was unable to backup its global data.\n", resource_name);
|
|
return required ? AST_MODULE_LOAD_FAILURE : AST_MODULE_LOAD_DECLINE;
|
|
}
|
|
|
|
mod->flags.declined = 0;
|
|
|
|
if (resource_heap) {
|
|
ast_heap_push(resource_heap, mod);
|
|
res = AST_MODULE_LOAD_PRIORITY;
|
|
} else {
|
|
res = start_resource(mod);
|
|
}
|
|
|
|
/* Now make sure that the list is sorted */
|
|
AST_LIST_LOCK(&module_list);
|
|
AST_LIST_REMOVE(&module_list, mod, entry);
|
|
AST_LIST_INSERT_SORTALPHA(&module_list, mod, entry, resource);
|
|
AST_LIST_UNLOCK(&module_list);
|
|
|
|
return res;
|
|
}
|
|
|
|
int ast_load_resource(const char *resource_name)
|
|
{
|
|
int res;
|
|
AST_LIST_LOCK(&module_list);
|
|
res = load_resource(resource_name, 0, NULL, 0);
|
|
if (!res) {
|
|
ast_test_suite_event_notify("MODULE_LOAD", "Message: %s", resource_name);
|
|
}
|
|
AST_LIST_UNLOCK(&module_list);
|
|
|
|
return res;
|
|
}
|
|
|
|
struct load_order_entry {
|
|
char *resource;
|
|
int required;
|
|
AST_LIST_ENTRY(load_order_entry) entry;
|
|
};
|
|
|
|
AST_LIST_HEAD_NOLOCK(load_order, load_order_entry);
|
|
|
|
static struct load_order_entry *add_to_load_order(const char *resource, struct load_order *load_order, int required)
|
|
{
|
|
struct load_order_entry *order;
|
|
|
|
AST_LIST_TRAVERSE(load_order, order, entry) {
|
|
if (!resource_name_match(order->resource, resource)) {
|
|
/* Make sure we have the proper setting for the required field
|
|
(we might have both load= and required= lines in modules.conf) */
|
|
order->required |= required;
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (!(order = ast_calloc(1, sizeof(*order))))
|
|
return NULL;
|
|
|
|
order->resource = ast_strdup(resource);
|
|
order->required = required;
|
|
AST_LIST_INSERT_TAIL(load_order, order, entry);
|
|
|
|
return order;
|
|
}
|
|
|
|
static int mod_load_cmp(void *a, void *b)
|
|
{
|
|
struct ast_module *a_mod = (struct ast_module *) a;
|
|
struct ast_module *b_mod = (struct ast_module *) b;
|
|
int res = -1;
|
|
/* if load_pri is not set, default is 128. Lower is better*/
|
|
unsigned char a_pri = ast_test_flag(a_mod->info, AST_MODFLAG_LOAD_ORDER) ? a_mod->info->load_pri : 128;
|
|
unsigned char b_pri = ast_test_flag(b_mod->info, AST_MODFLAG_LOAD_ORDER) ? b_mod->info->load_pri : 128;
|
|
if (a_pri == b_pri) {
|
|
res = 0;
|
|
} else if (a_pri < b_pri) {
|
|
res = 1;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/*! loads modules in order by load_pri, updates mod_count
|
|
\return -1 on failure to load module, -2 on failure to load required module, otherwise 0
|
|
*/
|
|
static int load_resource_list(struct load_order *load_order, unsigned int global_symbols, int *mod_count)
|
|
{
|
|
struct ast_heap *resource_heap;
|
|
struct load_order_entry *order;
|
|
struct ast_module *mod;
|
|
int count = 0;
|
|
int res = 0;
|
|
|
|
if(!(resource_heap = ast_heap_create(8, mod_load_cmp, -1))) {
|
|
return -1;
|
|
}
|
|
|
|
/* first, add find and add modules to heap */
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(load_order, order, entry) {
|
|
switch (load_resource(order->resource, global_symbols, resource_heap, order->required)) {
|
|
case AST_MODULE_LOAD_SUCCESS:
|
|
case AST_MODULE_LOAD_DECLINE:
|
|
AST_LIST_REMOVE_CURRENT(entry);
|
|
ast_free(order->resource);
|
|
ast_free(order);
|
|
break;
|
|
case AST_MODULE_LOAD_FAILURE:
|
|
ast_log(LOG_ERROR, "*** Failed to load module %s - %s\n", order->resource, order->required ? "Required" : "Not required");
|
|
fprintf(stderr, "*** Failed to load module %s - %s\n", order->resource, order->required ? "Required" : "Not required");
|
|
res = order->required ? -2 : -1;
|
|
goto done;
|
|
case AST_MODULE_LOAD_SKIP:
|
|
break;
|
|
case AST_MODULE_LOAD_PRIORITY:
|
|
AST_LIST_REMOVE_CURRENT(entry);
|
|
break;
|
|
}
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
|
|
/* second remove modules from heap sorted by priority */
|
|
while ((mod = ast_heap_pop(resource_heap))) {
|
|
switch (start_resource(mod)) {
|
|
case AST_MODULE_LOAD_SUCCESS:
|
|
count++;
|
|
case AST_MODULE_LOAD_DECLINE:
|
|
break;
|
|
case AST_MODULE_LOAD_FAILURE:
|
|
res = -1;
|
|
goto done;
|
|
case AST_MODULE_LOAD_SKIP:
|
|
case AST_MODULE_LOAD_PRIORITY:
|
|
break;
|
|
}
|
|
}
|
|
|
|
done:
|
|
if (mod_count) {
|
|
*mod_count += count;
|
|
}
|
|
ast_heap_destroy(resource_heap);
|
|
|
|
return res;
|
|
}
|
|
|
|
int load_modules(unsigned int preload_only)
|
|
{
|
|
struct ast_config *cfg;
|
|
struct ast_module *mod;
|
|
struct load_order_entry *order;
|
|
struct ast_variable *v;
|
|
unsigned int load_count;
|
|
struct load_order load_order;
|
|
int res = 0;
|
|
struct ast_flags config_flags = { 0 };
|
|
int modulecount = 0;
|
|
|
|
#ifdef LOADABLE_MODULES
|
|
struct dirent *dirent;
|
|
DIR *dir;
|
|
#endif
|
|
|
|
/* all embedded modules have registered themselves by now */
|
|
embedding = 0;
|
|
|
|
ast_verb(1, "Asterisk Dynamic Loader Starting:\n");
|
|
|
|
AST_LIST_HEAD_INIT_NOLOCK(&load_order);
|
|
|
|
AST_LIST_LOCK(&module_list);
|
|
|
|
if (embedded_module_list.first) {
|
|
module_list.first = embedded_module_list.first;
|
|
module_list.last = embedded_module_list.last;
|
|
embedded_module_list.first = NULL;
|
|
}
|
|
|
|
cfg = ast_config_load2(AST_MODULE_CONFIG, "" /* core, can't reload */, config_flags);
|
|
if (cfg == CONFIG_STATUS_FILEMISSING || cfg == CONFIG_STATUS_FILEINVALID) {
|
|
ast_log(LOG_WARNING, "No '%s' found, no modules will be loaded.\n", AST_MODULE_CONFIG);
|
|
goto done;
|
|
}
|
|
|
|
/* first, find all the modules we have been explicitly requested to load */
|
|
for (v = ast_variable_browse(cfg, "modules"); v; v = v->next) {
|
|
if (!strcasecmp(v->name, preload_only ? "preload" : "load")) {
|
|
add_to_load_order(v->value, &load_order, 0);
|
|
}
|
|
if (!strcasecmp(v->name, preload_only ? "preload-require" : "require")) {
|
|
/* Add the module to the list and make sure it's required */
|
|
add_to_load_order(v->value, &load_order, 1);
|
|
ast_debug(2, "Adding module to required list: %s (%s)\n", v->value, v->name);
|
|
}
|
|
|
|
}
|
|
|
|
/* check if 'autoload' is on */
|
|
if (!preload_only && ast_true(ast_variable_retrieve(cfg, "modules", "autoload"))) {
|
|
/* if so, first add all the embedded modules that are not already running to the load order */
|
|
AST_LIST_TRAVERSE(&module_list, mod, entry) {
|
|
/* if it's not embedded, skip it */
|
|
if (mod->lib)
|
|
continue;
|
|
|
|
if (mod->flags.running)
|
|
continue;
|
|
|
|
add_to_load_order(mod->resource, &load_order, 0);
|
|
}
|
|
|
|
#ifdef LOADABLE_MODULES
|
|
/* if we are allowed to load dynamic modules, scan the directory for
|
|
for all available modules and add them as well */
|
|
if ((dir = opendir(ast_config_AST_MODULE_DIR))) {
|
|
while ((dirent = readdir(dir))) {
|
|
int ld = strlen(dirent->d_name);
|
|
|
|
/* Must end in .so to load it. */
|
|
|
|
if (ld < 4)
|
|
continue;
|
|
|
|
if (strcasecmp(dirent->d_name + ld - 3, ".so"))
|
|
continue;
|
|
|
|
/* if there is already a module by this name in the module_list,
|
|
skip this file */
|
|
if (find_resource(dirent->d_name, 0))
|
|
continue;
|
|
|
|
add_to_load_order(dirent->d_name, &load_order, 0);
|
|
}
|
|
|
|
closedir(dir);
|
|
} else {
|
|
if (!ast_opt_quiet)
|
|
ast_log(LOG_WARNING, "Unable to open modules directory '%s'.\n",
|
|
ast_config_AST_MODULE_DIR);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* now scan the config for any modules we are prohibited from loading and
|
|
remove them from the load order */
|
|
for (v = ast_variable_browse(cfg, "modules"); v; v = v->next) {
|
|
if (strcasecmp(v->name, "noload"))
|
|
continue;
|
|
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&load_order, order, entry) {
|
|
if (!resource_name_match(order->resource, v->value)) {
|
|
AST_LIST_REMOVE_CURRENT(entry);
|
|
ast_free(order->resource);
|
|
ast_free(order);
|
|
}
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
}
|
|
|
|
/* we are done with the config now, all the information we need is in the
|
|
load_order list */
|
|
ast_config_destroy(cfg);
|
|
|
|
load_count = 0;
|
|
AST_LIST_TRAVERSE(&load_order, order, entry)
|
|
load_count++;
|
|
|
|
if (load_count)
|
|
ast_log(LOG_NOTICE, "%d modules will be loaded.\n", load_count);
|
|
|
|
/* first, load only modules that provide global symbols */
|
|
if ((res = load_resource_list(&load_order, 1, &modulecount)) < 0) {
|
|
goto done;
|
|
}
|
|
|
|
/* now load everything else */
|
|
if ((res = load_resource_list(&load_order, 0, &modulecount)) < 0) {
|
|
goto done;
|
|
}
|
|
|
|
done:
|
|
while ((order = AST_LIST_REMOVE_HEAD(&load_order, entry))) {
|
|
ast_free(order->resource);
|
|
ast_free(order);
|
|
}
|
|
|
|
AST_LIST_UNLOCK(&module_list);
|
|
|
|
/* Tell manager clients that are aggressive at logging in that we're done
|
|
loading modules. If there's a DNS problem in chan_sip, we might not
|
|
even reach this */
|
|
/*** DOCUMENTATION
|
|
<managerEventInstance>
|
|
<synopsis>Raised when all dynamic modules have finished their initial loading.</synopsis>
|
|
<syntax>
|
|
<parameter name="ModuleSelection">
|
|
<enumlist>
|
|
<enum name="Preload"/>
|
|
<enum name="All"/>
|
|
</enumlist>
|
|
</parameter>
|
|
</syntax>
|
|
</managerEventInstance>
|
|
***/
|
|
manager_event(EVENT_FLAG_SYSTEM, "ModuleLoadReport", "ModuleLoadStatus: Done\r\nModuleSelection: %s\r\nModuleCount: %d\r\n", preload_only ? "Preload" : "All", modulecount);
|
|
|
|
return res;
|
|
}
|
|
|
|
void ast_update_use_count(void)
|
|
{
|
|
/* Notify any module monitors that the use count for a
|
|
resource has changed */
|
|
struct loadupdate *m;
|
|
|
|
AST_LIST_LOCK(&updaters);
|
|
AST_LIST_TRAVERSE(&updaters, m, entry)
|
|
m->updater();
|
|
AST_LIST_UNLOCK(&updaters);
|
|
}
|
|
|
|
int ast_update_module_list(int (*modentry)(const char *module, const char *description, int usecnt, const char *status, const char *like),
|
|
const char *like)
|
|
{
|
|
struct ast_module *cur;
|
|
int unlock = -1;
|
|
int total_mod_loaded = 0;
|
|
|
|
if (AST_LIST_TRYLOCK(&module_list))
|
|
unlock = 0;
|
|
|
|
AST_LIST_TRAVERSE(&module_list, cur, entry) {
|
|
total_mod_loaded += modentry(cur->resource, cur->info->description, cur->usecount,
|
|
cur->flags.running ? "Running" : "Not Running", like);
|
|
}
|
|
|
|
if (unlock)
|
|
AST_LIST_UNLOCK(&module_list);
|
|
|
|
return total_mod_loaded;
|
|
}
|
|
|
|
/*! \brief Check if module exists */
|
|
int ast_module_check(const char *name)
|
|
{
|
|
struct ast_module *cur;
|
|
|
|
if (ast_strlen_zero(name))
|
|
return 0; /* FALSE */
|
|
|
|
cur = find_resource(name, 1);
|
|
|
|
return (cur != NULL);
|
|
}
|
|
|
|
|
|
int ast_loader_register(int (*v)(void))
|
|
{
|
|
struct loadupdate *tmp;
|
|
|
|
if (!(tmp = ast_malloc(sizeof(*tmp))))
|
|
return -1;
|
|
|
|
tmp->updater = v;
|
|
AST_LIST_LOCK(&updaters);
|
|
AST_LIST_INSERT_HEAD(&updaters, tmp, entry);
|
|
AST_LIST_UNLOCK(&updaters);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ast_loader_unregister(int (*v)(void))
|
|
{
|
|
struct loadupdate *cur;
|
|
|
|
AST_LIST_LOCK(&updaters);
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&updaters, cur, entry) {
|
|
if (cur->updater == v) {
|
|
AST_LIST_REMOVE_CURRENT(entry);
|
|
break;
|
|
}
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
AST_LIST_UNLOCK(&updaters);
|
|
|
|
return cur ? 0 : -1;
|
|
}
|
|
|
|
struct ast_module *ast_module_ref(struct ast_module *mod)
|
|
{
|
|
if (!mod) {
|
|
return NULL;
|
|
}
|
|
|
|
ast_atomic_fetchadd_int(&mod->usecount, +1);
|
|
ast_update_use_count();
|
|
|
|
return mod;
|
|
}
|
|
|
|
void ast_module_unref(struct ast_module *mod)
|
|
{
|
|
if (!mod) {
|
|
return;
|
|
}
|
|
|
|
ast_atomic_fetchadd_int(&mod->usecount, -1);
|
|
ast_update_use_count();
|
|
}
|