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res_pjsip: Refactor load_module/unload_module

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load_module was just too hairy with every step having to clean up all
previous steps on failure.

Some of the pjproject init calls have now been moved to a separate
load_pjsip function and the unload_pjsip function was enhanced to clean
up everything if an error happened at any stage of the load process.

In the process, a bunch of missing pj_shutdowns, serializer_pool_shutdowns
and ast_threadpool_shutdowns were also corrected.

Change-Id: I5eec711b437c35b56605ed99537ebbb30463b302
This commit is contained in:
George Joseph
2016-02-09 16:34:05 -07:00
parent a39486552e
commit b37555cc94
2 changed files with 107 additions and 117 deletions
Download Patch File Download Diff File Expand all files Collapse all files

216
res/res_pjsip.c
View File

@@ -3942,31 +3942,54 @@ static int reload_configuration_task(void *obj)
return 0;
}
static int load_module(void)
static int unload_pjsip(void *data)
{
/*
* These calls need the pjsip endpoint and serializer to clean up.
* If they're not set, then there's nothing to clean up anyway.
*/
if (ast_pjsip_endpoint && serializer_pool[0]) {
ast_res_pjsip_cleanup_options_handling();
ast_sip_destroy_distributor();
ast_res_pjsip_destroy_configuration();
ast_sip_destroy_system();
ast_sip_destroy_global_headers();
internal_sip_unregister_service(&supplement_module);
}
if (monitor_thread) {
stop_monitor_thread();
monitor_thread = NULL;
}
if (memory_pool) {
pj_pool_release(memory_pool);
memory_pool = NULL;
}
ast_pjsip_endpoint = NULL;
if (caching_pool.lock) {
pj_caching_pool_destroy(&caching_pool);
}
pj_shutdown();
return 0;
}
static int load_pjsip(void)
{
pj_status_t status;
/* The third parameter is just copied from
* example code from PJLIB. This can be adjusted
* if necessary.
*/
pj_status_t status;
struct ast_threadpool_options options;
CHECK_PJPROJECT_MODULE_LOADED();
if (pj_init() != PJ_SUCCESS) {
return AST_MODULE_LOAD_DECLINE;
}
if (pjlib_util_init() != PJ_SUCCESS) {
pj_shutdown();
return AST_MODULE_LOAD_DECLINE;
}
pj_caching_pool_init(&caching_pool, NULL, 1024 * 1024);
if (pjsip_endpt_create(&caching_pool.factory, "SIP", &ast_pjsip_endpoint) != PJ_SUCCESS) {
ast_log(LOG_ERROR, "Failed to create PJSIP endpoint structure. Aborting load\n");
pj_caching_pool_destroy(&caching_pool);
return AST_MODULE_LOAD_DECLINE;
goto error;
}
/* PJSIP will automatically try to add a Max-Forwards header. Since we want to control that,
@@ -3977,10 +4000,7 @@ static int load_module(void)
memory_pool = pj_pool_create(&caching_pool.factory, "SIP", 1024, 1024, NULL);
if (!memory_pool) {
ast_log(LOG_ERROR, "Failed to create memory pool for SIP. Aborting load\n");
pjsip_endpt_destroy(ast_pjsip_endpoint);
ast_pjsip_endpoint = NULL;
pj_caching_pool_destroy(&caching_pool);
return AST_MODULE_LOAD_DECLINE;
goto error;
}
if (!pj_gethostip(pj_AF_INET(), &host_ip_ipv4)) {
@@ -3993,42 +4013,6 @@ static int load_module(void)
ast_verb(3, "Local IPv6 address determined to be: %s\n", host_ip_ipv6_string);
}
if (ast_sip_initialize_system()) {
ast_log(LOG_ERROR, "Failed to initialize SIP 'system' configuration section. Aborting load\n");
pj_pool_release(memory_pool);
memory_pool = NULL;
pjsip_endpt_destroy(ast_pjsip_endpoint);
ast_pjsip_endpoint = NULL;
pj_caching_pool_destroy(&caching_pool);
return AST_MODULE_LOAD_DECLINE;
}
sip_get_threadpool_options(&options);
options.thread_start = sip_thread_start;
sip_threadpool = ast_threadpool_create("SIP", NULL, &options);
if (!sip_threadpool) {
ast_log(LOG_ERROR, "Failed to create SIP threadpool. Aborting load\n");
ast_sip_destroy_system();
pj_pool_release(memory_pool);
memory_pool = NULL;
pjsip_endpt_destroy(ast_pjsip_endpoint);
ast_pjsip_endpoint = NULL;
pj_caching_pool_destroy(&caching_pool);
return AST_MODULE_LOAD_DECLINE;
}
if (serializer_pool_setup()) {
ast_log(LOG_ERROR, "Failed to create SIP serializer pool. Aborting load\n");
ast_threadpool_shutdown(sip_threadpool);
ast_sip_destroy_system();
pj_pool_release(memory_pool);
memory_pool = NULL;
pjsip_endpt_destroy(ast_pjsip_endpoint);
ast_pjsip_endpoint = NULL;
pj_caching_pool_destroy(&caching_pool);
return AST_MODULE_LOAD_DECLINE;
}
pjsip_tsx_layer_init_module(ast_pjsip_endpoint);
pjsip_ua_init_module(ast_pjsip_endpoint, NULL);
@@ -4037,28 +4021,61 @@ static int load_module(void)
NULL, PJ_THREAD_DEFAULT_STACK_SIZE * 2, 0, &monitor_thread);
if (status != PJ_SUCCESS) {
ast_log(LOG_ERROR, "Failed to start SIP monitor thread. Aborting load\n");
ast_sip_destroy_system();
pj_pool_release(memory_pool);
memory_pool = NULL;
pjsip_endpt_destroy(ast_pjsip_endpoint);
ast_pjsip_endpoint = NULL;
pj_caching_pool_destroy(&caching_pool);
goto error;
}
return AST_MODULE_LOAD_SUCCESS;
error:
unload_pjsip(NULL);
return AST_MODULE_LOAD_DECLINE;
}
static int load_module(void)
{
struct ast_threadpool_options options;
CHECK_PJPROJECT_MODULE_LOADED();
/* pjproject and config_system need to be initialized before all else */
if (pj_init() != PJ_SUCCESS) {
return AST_MODULE_LOAD_DECLINE;
}
if (pjlib_util_init() != PJ_SUCCESS) {
goto error;
}
if (ast_sip_initialize_system()) {
ast_log(LOG_ERROR, "Failed to initialize SIP 'system' configuration section. Aborting load\n");
goto error;
}
/* The serializer needs threadpool and threadpool needs pjproject to be initialized so it's next */
sip_get_threadpool_options(&options);
options.thread_start = sip_thread_start;
sip_threadpool = ast_threadpool_create("SIP", NULL, &options);
if (!sip_threadpool) {
goto error;
}
if (serializer_pool_setup()) {
ast_log(LOG_ERROR, "Failed to create SIP serializer pool. Aborting load\n");
goto error;
}
/* Now load all the pjproject infrastructure. */
if (load_pjsip()) {
goto error;
}
ast_sip_initialize_dns();
ast_sip_initialize_global_headers();
if (ast_res_pjsip_initialize_configuration()) {
ast_log(LOG_ERROR, "Failed to initialize SIP configuration. Aborting load\n");
ast_sip_destroy_global_headers();
stop_monitor_thread();
ast_sip_destroy_system();
pj_pool_release(memory_pool);
memory_pool = NULL;
pjsip_endpt_destroy(ast_pjsip_endpoint);
ast_pjsip_endpoint = NULL;
pj_caching_pool_destroy(&caching_pool);
return AST_MODULE_LOAD_DECLINE;
goto error;
}
ast_sip_initialize_resolver();
@@ -4066,31 +4083,12 @@ static int load_module(void)
if (ast_sip_initialize_distributor()) {
ast_log(LOG_ERROR, "Failed to register distributor module. Aborting load\n");
ast_res_pjsip_destroy_configuration();
ast_sip_destroy_global_headers();
stop_monitor_thread();
ast_sip_destroy_system();
pj_pool_release(memory_pool);
memory_pool = NULL;
pjsip_endpt_destroy(ast_pjsip_endpoint);
ast_pjsip_endpoint = NULL;
pj_caching_pool_destroy(&caching_pool);
return AST_MODULE_LOAD_DECLINE;
goto error;
}
if (internal_sip_register_service(&supplement_module)) {
ast_log(LOG_ERROR, "Failed to initialize supplement hooks. Aborting load\n");
ast_sip_destroy_distributor();
ast_res_pjsip_destroy_configuration();
ast_sip_destroy_global_headers();
stop_monitor_thread();
ast_sip_destroy_system();
pj_pool_release(memory_pool);
memory_pool = NULL;
pjsip_endpt_destroy(ast_pjsip_endpoint);
ast_pjsip_endpoint = NULL;
pj_caching_pool_destroy(&caching_pool);
return AST_MODULE_LOAD_DECLINE;
goto error;
}
ast_res_pjsip_init_options_handling(0);
@@ -4102,6 +4100,14 @@ static int load_module(void)
ast_pjproject_ref();
return AST_MODULE_LOAD_SUCCESS;
error:
/* These functions all check for NULLs and are safe to call at any time */
unload_pjsip(NULL);
serializer_pool_shutdown();
ast_threadpool_shutdown(sip_threadpool);
return AST_MODULE_LOAD_DECLINE;
}
static int reload_module(void)
@@ -4118,32 +4124,11 @@ static int reload_module(void)
return 0;
}
static int unload_pjsip(void *data)
{
ast_cli_unregister_multiple(cli_commands, ARRAY_LEN(cli_commands));
ast_res_pjsip_cleanup_options_handling();
ast_sip_destroy_distributor();
ast_res_pjsip_destroy_configuration();
ast_sip_destroy_system();
ast_sip_destroy_global_headers();
internal_sip_unregister_service(&supplement_module);
if (monitor_thread) {
stop_monitor_thread();
}
if (memory_pool) {
pj_pool_release(memory_pool);
memory_pool = NULL;
}
ast_pjsip_endpoint = NULL;
pj_caching_pool_destroy(&caching_pool);
pj_shutdown();
return 0;
}
static int unload_module(void)
{
AST_TEST_UNREGISTER(xml_sanitization_end_null);
AST_TEST_UNREGISTER(xml_sanitization_exceeds_buffer);
ast_cli_unregister_multiple(cli_commands, ARRAY_LEN(cli_commands));
/* The thread this is called from cannot call PJSIP/PJLIB functions,
* so we have to push the work to the threadpool to handle
@@ -4153,7 +4138,6 @@ static int unload_module(void)
serializer_pool_shutdown();
ast_threadpool_shutdown(sip_threadpool);
ast_sip_destroy_cli();
ast_pjproject_unref();
return 0;

8
res/res_pjsip/pjsip_configuration.c
View File

@@ -2024,18 +2024,24 @@ int ast_res_pjsip_initialize_configuration(void)
void ast_res_pjsip_destroy_configuration(void)
{
if (!sip_sorcery) {
return;
}
ast_sorcery_observer_remove(sip_sorcery, CONTACT_STATUS, &state_contact_status_observer);
ast_sorcery_observer_remove(sip_sorcery, "contact", &state_contact_observer);
ast_sip_destroy_sorcery_global();
ast_sip_destroy_sorcery_location();
ast_sip_destroy_sorcery_auth();
ast_sip_destroy_sorcery_transport();
ast_sorcery_unref(sip_sorcery);
sip_sorcery = NULL;
ast_manager_unregister(AMI_SHOW_ENDPOINT);
ast_manager_unregister(AMI_SHOW_ENDPOINTS);
ast_cli_unregister_multiple(cli_commands, ARRAY_LEN(cli_commands));
ast_sip_unregister_cli_formatter(endpoint_formatter);
ast_sip_unregister_cli_formatter(channel_formatter);
ast_sorcery_unref(sip_sorcery);
ast_sip_destroy_cli();
ao2_cleanup(persistent_endpoints);
}