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Merge "loader: Rework load_resource_list."

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Jenkins2
2018-01-22 16:31:29 -06:00
committed by Gerrit Code Review
parent 908e39f186 e6142a1282
commit cec16d8e4f
1 changed files with 35 additions and 73 deletions
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main/loader.c
+35 -73
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@@ -1413,7 +1413,7 @@ static enum ast_module_load_result start_resource(struct ast_module *mod)
*
* If the module_vector 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 suppress_logging, struct module_vector *resource_heap, int required)
static enum ast_module_load_result load_resource(const char *resource_name, unsigned int suppress_logging, struct module_vector *module_priorities, int required)
{
struct ast_module *mod;
enum ast_module_load_result res = AST_MODULE_LOAD_SUCCESS;
@@ -1447,8 +1447,8 @@ static enum ast_module_load_result load_resource(const char *resource_name, unsi
mod->flags.declined = 0;
if (resource_heap) {
if (AST_VECTOR_ADD_SORTED(resource_heap, mod, module_vector_cmp)) {
if (module_priorities) {
if (AST_VECTOR_ADD_SORTED(module_priorities, mod, module_vector_cmp)) {
goto prestart_error;
}
res = AST_MODULE_LOAD_PRIORITY;
@@ -1632,115 +1632,77 @@ static int start_resource_list(struct module_vector *resources, int *mod_count)
*/
static int load_resource_list(struct load_order *load_order, int *mod_count)
{
struct module_vector resource_heap;
struct module_vector module_priorities;
struct load_order_entry *order;
struct load_retries load_retries;
int attempt = 0;
int count = 0;
int res = 0;
int i = 0;
#define LOAD_RETRIES 4
int didwork;
int lasttry = 0;
AST_LIST_HEAD_INIT_NOLOCK(&load_retries);
if (AST_VECTOR_INIT(&resource_heap, 500)) {
if (AST_VECTOR_INIT(&module_priorities, 500)) {
ast_log(LOG_ERROR, "Failed to initialize module loader.\n");
return -1;
}
/* first, add find and add modules to heap */
AST_LIST_TRAVERSE_SAFE_BEGIN(load_order, order, entry) {
enum ast_module_load_result lres;
while (!res) {
didwork = 0;
/* Suppress log messages unless this is the last pass */
lres = load_resource(order->resource, 1, &resource_heap, order->required);
ast_debug(3, "PASS 0: %-46s %d\n", order->resource, lres);
switch (lres) {
case AST_MODULE_LOAD_SUCCESS:
/* We're supplying a heap so SUCCESS isn't possible but we still have to test for it. */
break;
case AST_MODULE_LOAD_FAILURE:
case AST_MODULE_LOAD_DECLINE:
/*
* DECLINE or FAILURE means there was an issue with dlopen or module_register
* which might be retryable. LOAD_FAILURE only happens for required modules
* but we're still going to retry. We need to remove the entry from the
* load_order list and add it to the load_retries list.
*/
AST_LIST_REMOVE_CURRENT(entry);
AST_LIST_INSERT_TAIL(&load_retries, order, entry);
break;
case AST_MODULE_LOAD_SKIP:
/*
* SKIP means that dlopen worked but global_symbols was set and this module doesn't qualify.
* Leave it in load_order for the next call of load_resource_list.
*/
break;
case AST_MODULE_LOAD_PRIORITY:
/* load_resource worked and the module was added to the priority vector */
AST_LIST_REMOVE_CURRENT(entry);
ast_free(order->resource);
ast_free(order);
break;
}
}
AST_LIST_TRAVERSE_SAFE_END;
/* Retry the failures until the list is empty or we reach LOAD_RETRIES */
for (i = 0; !AST_LIST_EMPTY(&load_retries) && i < LOAD_RETRIES; i++) {
AST_LIST_TRAVERSE_SAFE_BEGIN(&load_retries, order, entry) {
AST_LIST_TRAVERSE_SAFE_BEGIN(load_order, order, entry) {
enum ast_module_load_result lres;
/* Suppress log messages unless this is the last pass */
lres = load_resource(order->resource, (i < LOAD_RETRIES - 1), &resource_heap, order->required);
ast_debug(3, "PASS %d %-46s %d\n", i + 1, order->resource, lres);
lres = load_resource(order->resource, !lasttry, &module_priorities, order->required);
ast_debug(3, "PASS %d: %-46s %d\n", attempt, order->resource, lres);
switch (lres) {
/* These are all retryable. */
case AST_MODULE_LOAD_SUCCESS:
case AST_MODULE_LOAD_SKIP:
/* We're supplying module_priorities so SUCCESS isn't possible but we
* still have to test for it. SKIP is only used when we try to start a
* module that is missing dependencies. */
break;
case AST_MODULE_LOAD_DECLINE:
break;
case AST_MODULE_LOAD_FAILURE:
/* LOAD_FAILURE only happens for required modules */
if (i == LOAD_RETRIES - 1) {
/* This was the last chance to load a required module*/
if (lasttry) {
/* This run is just to print errors. */
ast_log(LOG_ERROR, "*** Failed to load module %s - Required\n", order->resource);
fprintf(stderr, "*** Failed to load module %s - Required\n", order->resource);
res = -2;
goto done;
}
break;;
case AST_MODULE_LOAD_SKIP:
/*
* SKIP means that dlopen worked but global_symbols was set and this module
* doesn't qualify. Put it back in load_order for the next call of
* load_resource_list.
*/
AST_LIST_REMOVE_CURRENT(entry);
AST_LIST_INSERT_TAIL(load_order, order, entry);
break;
case AST_MODULE_LOAD_PRIORITY:
/* load_resource worked and the module was added to the priority heap */
/* load_resource worked and the module was added to module_priorities */
AST_LIST_REMOVE_CURRENT(entry);
ast_free(order->resource);
ast_free(order);
didwork = 1;
break;
}
}
AST_LIST_TRAVERSE_SAFE_END;
if (!didwork) {
if (lasttry) {
break;
}
/* We know the next try is going to fail, it's only being performed
* so we can print errors. */
lasttry = 1;
}
attempt++;
}
res = start_resource_list(&resource_heap, &count);
done:
while ((order = AST_LIST_REMOVE_HEAD(&load_retries, entry))) {
ast_free(order->resource);
ast_free(order);
if (!res) {
res = start_resource_list(&module_priorities, &count);
}
if (mod_count) {
*mod_count += count;
}
AST_VECTOR_FREE(&resource_heap);
AST_VECTOR_FREE(&module_priorities);
return res;
}