[libvirt] [PATCHv7 09/18] util: Add more interfaces for resctrl monitor

[John Ferlan]

On 10/22/18 4:01 AM, Wang Huaqiang wrote:
> Add interfaces monitor group to support operations such
> as add PID, set ID, remove group ... etc.
> 
> Signed-off-by: Wang Huaqiang <huaqiang.wang at intel.com>
> ---
>  src/libvirt_private.syms |  5 +++++
>  src/util/virresctrl.c    | 47 +++++++++++++++++++++++++++++++++++++++++++++++
>  src/util/virresctrl.h    | 14 ++++++++++++++
>  3 files changed, 66 insertions(+)
> 

[...]

> +int
> +virResctrlMonitorRemove(virResctrlMonitorPtr monitor)
> +{
> +    int ret = 0;
> +
> +    if (!monitor->path)
> +        return 0;

Similar to patch1 - if we are using a default path, then we don't want
to removed even if it exists, so I *think* (but you need to confirm for
me) that the following should be done:

    if (STREQ(monitor->path, monitor->alloc->path))
        return 0;

Although I wonder if a !monitor->alloc guard should be used as well.
Whether it's part of a || !monitor->path return 0 or this check should
be "if (monitor->alloc && STREQ(...))"... Thoughts?

> +
> +    VIR_DEBUG("Removing resctrl monitor%s", monitor->path);

s/monitor%s/monitor path='%s'

> +    if (rmdir(monitor->path) != 0 && errno != ENOENT) {
> +        ret = -errno;
> +        VIR_ERROR(_("Unable to remove %s (%d)"), monitor->path, errno);
> +    }
> +
> +    return ret;
> +}

I can make the changes - just let me know your preferred way to proceed...

Reviewed-by: John Ferlan <jferlan at redhat.com>

John

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