Re: [Qemu-devel] [PATCHv4 2/6] seccomp: add obsolete argument to command line

[Daniel P. Berrange]

On Fri, Sep 01, 2017 at 12:58:14PM +0200, Eduardo Otubo wrote:
> This patch introduces the argument [,obsolete=allow] to the `-sandbox on'
> option. It allows Qemu to run safely on old system that still relies on
> old system calls.
> 
> Signed-off-by: Eduardo Otubo <address@hidden>
> ---
>  include/sysemu/seccomp.h |  3 ++-
>  qemu-options.hx          | 12 ++++++++++--
>  qemu-seccomp.c           | 23 ++++++++++++++++++++++-
>  vl.c                     | 22 +++++++++++++++++++++-
>  4 files changed, 55 insertions(+), 5 deletions(-)
> 

> @@ -1032,7 +1036,23 @@ static int parse_sandbox(void *opaque, QemuOpts *opts, 
> Error **errp)
>  {
>      if (qemu_opt_get_bool(opts, "enable", false)) {
>  #ifdef CONFIG_SECCOMP
> -        if (seccomp_start() < 0) {
> +        uint32_t seccomp_opts = 0x00000;
> +        const char *value = NULL;
> +
> +        value = qemu_opt_get(opts, "obsolete");
> +        if (value) {
> +            if (strcmp(value, "allow") == 0) {

I would have a slight preference for g_str_equal(value, "allow")

> +                seccomp_opts |= QEMU_SECCOMP_SET_OBSOLETE;
> +            } else if (strcmp(value, "deny")) {

and  !g_str_equal(value, "deny")

> +                /* this is the default option, this if is here
> +              * to provide a little bit of consistency for
> +              * the command line */
> +         } else {
> +             error_report("invalid argument for obsolete");
> +         }

There seem to be tabs for indent here too

> +        }
> +
> +        if (seccomp_start(seccomp_opts) < 0) {
>              error_report("failed to install seccomp syscall filter "
>                           "in the kernel");
>              return -1;
> -- 
> 2.13.5
> 

Regards,
Daniel
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