Re: [Qemu-devel] [PATCH] vl: Improve error message when we can't load fw_cfg from file

[Li Qiang]

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Li Qiang <address@hidden> 于2018年11月1日周四 下午1:59写道：

> parse_fw_cfg() reports "can't load" without further details.  Get
> the details from g_file_get_contents(), and include them in the
> error message.
>
> Signed-off-by: Li Qiang <address@hidden>
> ---
>  vl.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/vl.c b/vl.c
> index 1fcacc5..f0bd899 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2244,8 +2244,10 @@ static int parse_fw_cfg(void *opaque, QemuOpts
> *opts, Error **errp)
>          size = strlen(str); /* NUL terminator NOT included in fw_cfg blob
> */
>          buf = g_memdup(str, size);
>      } else {
> -        if (!g_file_get_contents(file, &buf, &size, NULL)) {
> -            error_setg(errp, "can't load %s", file);
> +        GError *err = NULL;
> +        if (!g_file_get_contents(file, &buf, &size, &err)) {
> +            error_setg(errp, "can't load %s: %s", file, err->message);
> +            g_error_free(err);
>              return -1;
>          }
>      }
> --
> 1.8.3.1
>
>