lib/pb-config: Add config_copy

[petitboot] / lib / pb-config / pb-config.c

diff --git a/lib/pb-config/pb-config.c b/lib/pb-config/pb-config.c
index aad3b9e5a44cf3f7838fe252e36a2b614a1d007f..9f696d55704495e568328ac17e4202087cdd1ffb 100644 (file)
--- a/lib/pb-config/pb-config.c
+++ b/lib/pb-config/pb-config.c
@@ -1,16 +1,20 @@
 
+#include <string.h>
+
 #include <log/log.h>
+#include <types/types.h>
 #include <talloc/talloc.h>
 
 #include "pb-config.h"
 
 #include "storage.h"
 
+void                           *config_ctx;
 static struct config           *config;
 static struct config_storage   *storage;
 
 
-static void config_set_defaults(struct config *config)
+void config_set_defaults(struct config *config)
 {
        config->autoboot_enabled = true;
        config->autoboot_timeout_sec = 10;
@@ -18,11 +22,80 @@ static void config_set_defaults(struct config *config)
        config->network.n_interfaces = 0;
        config->network.dns_servers = NULL;
        config->network.n_dns_servers = 0;
+
+       config->n_boot_priorities = 2;
+       config->boot_priorities = talloc_array(config, struct boot_priority,
+                                               config->n_boot_priorities);
+       config->boot_priorities[0].type = DEVICE_TYPE_NETWORK;
+       config->boot_priorities[1].type = DEVICE_TYPE_DISK;
+
 }
 
-static void dump_config(struct config *config)
+static struct interface_config *config_copy_interface(struct config *ctx,
+               struct interface_config *src)
 {
-       int i;
+       struct interface_config *dest = talloc(ctx, struct interface_config);
+
+       memcpy(dest->hwaddr, src->hwaddr, sizeof(src->hwaddr));
+       dest->ignore = src->ignore;
+
+       if (dest->ignore)
+               return dest;
+
+       dest->method = src->method;
+
+       switch (src->method) {
+       case CONFIG_METHOD_DHCP:
+               break;
+       case CONFIG_METHOD_STATIC:
+               dest->static_config.address =
+                       talloc_strdup(dest, src->static_config.address);
+               dest->static_config.gateway =
+                       talloc_strdup(dest, src->static_config.gateway);
+               break;
+       }
+
+       return dest;
+}
+
+struct config *config_copy(void *ctx, const struct config *src)
+{
+       struct config *dest;
+       unsigned int i;
+
+       dest = talloc(ctx, struct config);
+       dest->autoboot_enabled = src->autoboot_enabled;
+       dest->autoboot_timeout_sec = src->autoboot_timeout_sec;
+
+       dest->network.n_interfaces = src->network.n_interfaces;
+       dest->network.interfaces = talloc_array(dest, struct interface_config *,
+                                       dest->network.n_interfaces);
+       dest->network.n_dns_servers = src->network.n_dns_servers;
+       dest->network.dns_servers = talloc_array(dest, const char *,
+                                       dest->network.n_dns_servers);
+
+       for (i = 0; i < src->network.n_interfaces; i++)
+               dest->network.interfaces[i] = config_copy_interface(dest,
+                               src->network.interfaces[i]);
+
+       for (i = 0; i < src->network.n_dns_servers; i++)
+               dest->network.dns_servers[i] = talloc_strdup(dest,
+                               src->network.dns_servers[i]);
+
+       dest->n_boot_priorities = src->n_boot_priorities;
+       dest->boot_priorities = talloc_array(dest, struct boot_priority,
+                       src->n_boot_priorities);
+
+       for (i = 0; i < src->n_boot_priorities; i++)
+               dest->boot_priorities[i].type = src->boot_priorities[i].type;
+
+       return dest;
+}
+
+void dump_config(struct config *config);
+void dump_config(struct config *config)
+{
+       unsigned int i;
 
        pb_log("configuration:\n");
 
@@ -65,7 +138,9 @@ static void dump_config(struct config *config)
 
 int config_init(void *ctx)
 {
-       config = talloc(ctx, struct config);
+       config_ctx = talloc_new(ctx);
+
+       config = talloc(config_ctx, struct config);
        config_set_defaults(config);
 
        storage = create_powerpc_nvram_storage(config);
@@ -77,6 +152,29 @@ int config_init(void *ctx)
        return 0;
 }
 
+int config_set(struct config *newconfig)
+{
+       int rc;
+
+       if (!storage || !storage->save)
+               return -1;
+
+       if (newconfig == config)
+               return 0;
+
+       pb_log("new configuration data received\n");
+       dump_config(newconfig);
+
+       rc = storage->save(storage, newconfig);
+
+       if (!rc)
+               config = talloc_steal(config_ctx, newconfig);
+       else
+               pb_log("error saving new configuration; changes lost\n");
+
+       return rc;
+}
+
 /* A non-exported function to allow the test infrastructure to initialise
  * (and change) the configuration variables */
 struct parser_test;
@@ -104,6 +202,6 @@ void config_set_autoboot(bool autoboot_enabled)
 
 int config_fini(void)
 {
-       talloc_free(config);
+       talloc_free(config_ctx);
        return 0;
 }