[libvirt] [RFC] [PATCH v2 4/6] add interface virCgroupGetAppRoot

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(a)cn.fujitsu.com&gt; --- src/libvirt_private.syms | 1 + src/util/cgroup.c | 18 ++++++++++++++++++ src/util/cgroup.h | 2 ++ 3 files changed, 21 insertions(+), 0 deletions(-) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 9cbdbb4..53c35da 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -71,6 +71,7 @@ virCgroupDenyDeviceMajor; virCgroupDenyDevicePath; virCgroupForDomain; virCgroupForDriver; +virCgroupGetAppRoot; virCgroupForVcpu; virCgroupFree; virCgroupGetBlkioWeight; diff --git a/src/util/cgroup.c b/src/util/cgroup.c index d6fcd61..ee88aaf 100644 --- a/src/util/cgroup.c +++ b/src/util/cgroup.c @@ -846,6 +846,24 @@ int virCgroupForDriver(const char *name ATTRIBUTE_UNUSED, /** + * 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: * * @driver: group for driver owning the domain diff --git a/src/util/cgroup.h b/src/util/cgroup.h index caca362..f0e11fe 100644 --- a/src/util/cgroup.h +++ b/src/util/cgroup.h @@ -37,6 +37,8 @@ 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