[libvirt] [PATCH 01/13] Introduce the function virCgroupForHypervisor

Introduce the function virCgroupForHypervisor() to create sub directory for hypervisor thread(include I/O thread, vhost-net thread) Signed-off-by: Wen Congyang <wency(a)cn.fujitsu.com&gt; --- .gnulib | 2 +- src/libvirt_private.syms | 1 + src/util/cgroup.c | 42 ++++++++++++++++++++++++++++++++++++++++++ src/util/cgroup.h | 4 ++++ 4 files changed, 48 insertions(+), 1 deletion(-) diff --git a/.gnulib b/.gnulib index a02ba4b..77cef20 160000 --- a/.gnulib +++ b/.gnulib @@ -1 +1 @@ -Subproject commit a02ba4bf889fee4622db87f185c3d0af84d74ae7 +Subproject commit 77cef2022004c4066e805da09a83b2c77f17bdd3 diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 6625fc6..8925267 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -68,6 +68,7 @@ virCgroupDenyAllDevices; virCgroupDenyDevicePath; virCgroupForDomain; virCgroupForDriver; +virCgroupForHypervisor; virCgroupForVcpu; virCgroupFree; virCgroupGetBlkioWeight; diff --git a/src/util/cgroup.c b/src/util/cgroup.c index 5b32881..1ac8278 100644 --- a/src/util/cgroup.c +++ b/src/util/cgroup.c @@ -946,6 +946,48 @@ int virCgroupForVcpu(virCgroupPtr driver ATTRIBUTE_UNUSED, #endif /** + * virCgroupForHypervisor: + * + * @driver: group for the domain + * @group: Pointer to returned virCgroupPtr + * + * Returns: 0 on success or -errno on failure + */ +#if defined HAVE_MNTENT_H && defined HAVE_GETMNTENT_R +int virCgroupForHypervisor(virCgroupPtr driver, + virCgroupPtr *group, + int create) +{ + int rc; + char *path; + + if (driver == NULL) + return -EINVAL; + + if (virAsprintf(&path, "%s/hypervisor", driver->path) < 0) + return -ENOMEM; + + rc = virCgroupNew(path, group); + VIR_FREE(path); + + if (rc == 0) { + rc = virCgroupMakeGroup(driver, *group, create, VIR_CGROUP_VCPU); + if (rc != 0) + virCgroupFree(group); + } + + return rc; +} +#else +int virCgroupForHypervisor(virCgroupPtr driver ATTRIBUTE_UNUSED, + virCgroupPtr *group ATTRIBUTE_UNUSED, + int create ATTRIBUTE_UNUSED) +{ + return -ENXIO; +} + +#endif +/** * virCgroupSetBlkioWeight: * * @group: The cgroup to change io weight for diff --git a/src/util/cgroup.h b/src/util/cgroup.h index 05325ae..315ebd6 100644 --- a/src/util/cgroup.h +++ b/src/util/cgroup.h @@ -47,6 +47,10 @@ int virCgroupForVcpu(virCgroupPtr driver, virCgroupPtr *group, int create); +int virCgroupForHypervisor(virCgroupPtr driver, + virCgroupPtr *group, + int create); + int virCgroupPathOfController(virCgroupPtr group, int controller, const char *key, -- 1.7.10.2