[libvirt] [PATCH v3 09/15] vircgroup: introduce virCgroupV2DevicesGetKey

Device rules are stored in BPF map that is a hash type, this function will create a key based on major and minor id of device. Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com&gt; --- src/libvirt_private.syms | 1 + src/util/vircgroupv2devices.c | 8 ++++++++ src/util/vircgroupv2devices.h | 4 ++++ 3 files changed, 13 insertions(+) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 469a1cdbe0..18cb3715a2 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -1657,6 +1657,7 @@ virCgroupV2DevicesAttachProg; virCgroupV2DevicesAvailable; virCgroupV2DevicesCreateProg; virCgroupV2DevicesDetectProg; +virCgroupV2DevicesGetKey; virCgroupV2DevicesGetPerms; virCgroupV2DevicesPrepareProg; virCgroupV2DevicesRemoveProg; diff --git a/src/util/vircgroupv2devices.c b/src/util/vircgroupv2devices.c index 0455ff6b24..9b154ccb5d 100644 --- a/src/util/vircgroupv2devices.c +++ b/src/util/vircgroupv2devices.c @@ -660,3 +660,11 @@ virCgroupV2DevicesGetPerms(int perms ATTRIBUTE_UNUSED, return 0; } #endif /* !HAVE_DECL_BPF_CGROUP_DEVICE */ + + +uint64_t +virCgroupV2DevicesGetKey(int major, + int minor) +{ + return (uint64_t)major << 32 | ((uint64_t)minor & 0x00000000ffffffff); +} diff --git a/src/util/vircgroupv2devices.h b/src/util/vircgroupv2devices.h index cbfd9ae119..d717c9755f 100644 --- a/src/util/vircgroupv2devices.h +++ b/src/util/vircgroupv2devices.h @@ -47,4 +47,8 @@ uint32_t virCgroupV2DevicesGetPerms(int perms, char type); +uint64_t +virCgroupV2DevicesGetKey(int major, + int minor); + #endif /* LIBVIRT_VIRCGROUPV2DEVICES_H */ -- 2.20.1