On Mon, Nov 12, 2012 at 03:02:26PM +0800, Gao feng wrote:
> because libvirt_lxc's cgroup mountpoint is what it shown
> in /proc/self/cgroup.
>
> we can get container's cgroup through virCgroupNew("/", &group),
> add interface virCgroupGetAppRoot to help container to
> get it's cgroup.
>
> Signed-off-by: Gao feng <gaofeng@xxxxxxxxxxxxxx>
> ---
> src/libvirt_private.syms | 1 +
> src/util/cgroup.c | 15 +++++++++++++++
> src/util/cgroup.h | 2 ++
> 3 files changed, 18 insertions(+), 0 deletions(-)
>
> diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
> index 2608072..dd7ede2 100644
> --- a/src/libvirt_private.syms
> +++ b/src/libvirt_private.syms
> @@ -85,6 +85,7 @@ virCgroupDenyDeviceMajor;
> virCgroupDenyDevicePath;
> virCgroupForDomain;
> virCgroupForDriver;
> +virCgroupGetAppRoot;
> virCgroupForEmulator;
> virCgroupForVcpu;
> virCgroupFree;
> diff --git a/src/util/cgroup.c b/src/util/cgroup.c
> index 4aae70d..9777ad5 100644
> --- a/src/util/cgroup.c
> +++ b/src/util/cgroup.c
> @@ -965,6 +965,21 @@ int virCgroupForDriver(const char *name ATTRIBUTE_UNUSED,
> }
> #endif
>
> +/**
> +* virCgroupGetAppRoot:
> +*
> +* @group: Pointer to returned virCgroupPtr
> +*
> +* Returns 0 on success
> +*/
> +int virCgroupGetAppRoot(virCgroupPtr *group)
> +{
> +#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R
> + return virCgroupNew("/", group);
> +#else
> + return -ENXIO;
> +#endif
> +}
>
> /**
> * virCgroupForDomain:
> diff --git a/src/util/cgroup.h b/src/util/cgroup.h
> index 0c11eb1..e26f65f 100644
> --- a/src/util/cgroup.h
> +++ b/src/util/cgroup.h
> @@ -47,6 +47,8 @@ int virCgroupForDriver(const char *name,
> int privileged,
> int create);
>
> +int virCgroupGetAppRoot(virCgroupPtr *group);
> +
> int virCgroupForDomain(virCgroupPtr driver,
> const char *name,
> virCgroupPtr *group,
> --
> 1.7.7.6
I've no idea if this function will work or not, but the patch
doesn't appear to contain any problems so ACK.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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