Re: [PATCH libvirt] xen: handle root= in xen-xm configuration files.

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Ian Campbell wrote:
> On Tue, 2014-06-17 at 16:24 +0100, Ian Campbell wrote:
>   
>> +        if (xenXMConfigGetString(conf, "extra", &extra, NULL) < 0)
>>     
>
> This was subtly broken. The default needs to be "".
>
> -----8<------
>
> >From 539412a6deac8b928c82945d692ef20a49535d65 Mon Sep 17 00:00:00 2001
> From: Ian Campbell <ian.campbell@xxxxxxxxxx>
> Date: Tue, 17 Jun 2014 15:48:48 +0100
> Subject: [PATCH] xen: handle root= in xen-xm configuration files.
>
> In addition to extra= xm supported a root= option which was supposed
> to be incorporated into the final command line. Handle that for "virsh
> domxml-from-native xen-xm". Tested with the libxl backend.
>
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> ---
> v2: extra should default to "".
> ---
>  .gnulib            |    2 +-
>
> ---> WTF. I stripped this out of the patch shown below...
>
>  src/xenxs/xen_xm.c |   14 +++++++++++++-
>  2 files changed, 14 insertions(+), 2 deletions(-)
>   

ACK and pushed; thanks!

Regards,
Jim

> diff --git a/src/xenxs/xen_xm.c b/src/xenxs/xen_xm.c
> index b2db97d..745041b 100644
> --- a/src/xenxs/xen_xm.c
> +++ b/src/xenxs/xen_xm.c
> @@ -339,6 +339,8 @@ xenParseXM(virConfPtr conf, int xendConfigVersion,
>              def->os.nBootDevs++;
>          }
>      } else {
> +        const char *extra, *root;
> +
>          if (xenXMConfigCopyStringOpt(conf, "bootloader", &def->os.bootloader) < 0)
>              goto cleanup;
>          if (xenXMConfigCopyStringOpt(conf, "bootargs", &def->os.bootloaderArgs) < 0)
> @@ -348,8 +350,18 @@ xenParseXM(virConfPtr conf, int xendConfigVersion,
>              goto cleanup;
>          if (xenXMConfigCopyStringOpt(conf, "ramdisk", &def->os.initrd) < 0)
>              goto cleanup;
> -        if (xenXMConfigCopyStringOpt(conf, "extra", &def->os.cmdline) < 0)
> +        if (xenXMConfigGetString(conf, "extra", &extra, "") < 0)
> +            goto cleanup;
> +        if (xenXMConfigGetString(conf, "root", &root, NULL) < 0)
>              goto cleanup;
> +
> +        if (root) {
> +            if (virAsprintf(&def->os.cmdline, "root=%s %s", root, extra) < 0)
> +                goto cleanup;
> +        } else {
> +            if (VIR_STRDUP(def->os.cmdline, extra) < 0)
> +                goto cleanup;
> +        }
>      }
>  
>      if (xenXMConfigGetULongLong(conf, "memory", &def->mem.cur_balloon,
>   

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