[LEDE-DEV] [PATCH 1/3][RFC] netifd: propagate error code on netifd_reload()

[Hans Dedecker]

On Mon, Mar 20, 2017 at 3:08 PM, Alexandru Ardelean
<ardeleanalex at gmail.com> wrote:
> From: Alexandru Ardelean <ardeleanalex at gmail.com>
>
> The context is that we generate some of the UCI config
> for netifd via scripts/programs.
>
> Every once in a while, there's a goof when doing that
> UCI generation, and netifd prints out the error at
> stderr, but returns 0 (success) err-code.
>
> This change will fail the ubus call if UCI config
> is invalid or missing for /etc/config/network.
>
> Signed-off-by: Alexandru Ardelean <ardeleanalex at gmail.com>
> ---
>  config.c | 10 ++++++++--
>  config.h |  9 ++++++++-
>  main.c   |  4 ++--
>  netifd.h |  2 +-
>  ubus.c   |  8 ++++++--
>  5 files changed, 25 insertions(+), 8 deletions(-)
>
> diff --git a/config.c b/config.c
> index 0d965d3..3b1af82 100644
> --- a/config.c
> +++ b/config.c
> @@ -393,16 +393,20 @@ config_init_wireless(void)
>                 vlist_flush(&wdev->interfaces);
>  }
>
> -void
> +int
>  config_init_all(void)
>  {
> +       int ret = CONFIG_INIT_OK;
> +
>         uci_network = config_init_package("network");
>         if (!uci_network) {
>                 fprintf(stderr, "Failed to load network config\n");
> -               return;
> +               return CONFIG_INIT_ERR_NO_NETWORK;
>         }
>
>         uci_wireless = config_init_package("wireless");
> +       if (!uci_wireless)
> +               ret = CONFIG_INIT_ERR_NO_WIRELESS;
>
>         vlist_update(&interfaces);
>         config_init = true;
> @@ -426,4 +430,6 @@ config_init_all(void)
>         interface_refresh_assignments(false);
>         interface_start_pending();
>         wireless_start_pending();
> +
> +       return ret;
>  }
> diff --git a/config.h b/config.h
> index 5adaca6..df30b64 100644
> --- a/config.h
> +++ b/config.h
> @@ -19,6 +19,13 @@
>
>  extern bool config_init;
>
> -void config_init_all(void);
> +enum {
> +       CONFIG_INIT_OK,
> +       CONFIG_INIT_ERR_NO_WIRELESS,
> +       CONFIG_INIT_ERR_NO_NETWORK,
> +       __CONFIG_INIT_LAST
> +};
> +
> +int config_init_all(void);
>
>  #endif
> diff --git a/main.c b/main.c
> index 5717b81..c173cef 100644
> --- a/main.c
> +++ b/main.c
> @@ -208,9 +208,9 @@ static void netifd_do_restart(struct uloop_timeout *timeout)
>         execvp(global_argv[0], global_argv);
>  }
>
> -void netifd_reload(void)
> +int netifd_reload(void)
>  {
> -       config_init_all();
> +       return config_init_all();
>  }
>
>  void netifd_restart(void)
> diff --git a/netifd.h b/netifd.h
> index 5a90858..e565423 100644
> --- a/netifd.h
> +++ b/netifd.h
> @@ -98,6 +98,6 @@ struct interface;
>  extern const char *main_path;
>  extern const char *config_path;
>  void netifd_restart(void);
> -void netifd_reload(void);
> +int netifd_reload(void);
>
>  #endif
> diff --git a/ubus.c b/ubus.c
> index 1b1a4cd..31e535c 100644
> --- a/ubus.c
> +++ b/ubus.c
> @@ -44,8 +44,12 @@ netifd_handle_reload(struct ubus_context *ctx, struct ubus_object *obj,
>                      struct ubus_request_data *req, const char *method,
>                      struct blob_attr *msg)
>  {
> -       netifd_reload();
> -       return 0;
> +       switch (netifd_reload()) {
> +               case CONFIG_INIT_ERR_NO_NETWORK:
> +                       return UBUS_STATUS_UNKNOWN_ERROR;
Is there any reason why only an ubus error code is returned for a
network uci failure and not for a wireless uci failure ?

Hans
> +               default:
> +                       return UBUS_STATUS_OK;
> +       }
>  }
>
>  enum {
> --
> 2.7.4
>