From 02794cc41dc547c75cd5ac5a3929f5e93bdd7665 Mon Sep 17 00:00:00 2001 From: Michal Privoznik Date: Mon, 9 Mar 2020 13:14:07 +0100 Subject: [PATCH] virCgroupV2DevicesAvailable: Print stringified errno in the debug log In the virCgroupV2DevicesAvailable() function we try to determine whether CGroups version 2 are available. We do this by opening what we believe is the CGroup mount point and issuing a BPF call. When the call fails, a debug message is printed. However, the BPF call sets errno too. Include it in the debug message to help us with debugging. Signed-off-by: Michal Privoznik Reviewed-by: Daniel Henrique Barboza --- src/util/vircgroupv2devices.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/util/vircgroupv2devices.c b/src/util/vircgroupv2devices.c index 445f9c53fc..d62ee12a05 100644 --- a/src/util/vircgroupv2devices.c +++ b/src/util/vircgroupv2devices.c @@ -55,7 +55,7 @@ virCgroupV2DevicesAvailable(virCgroupPtr group) } if (virBPFQueryProg(cgroupfd, 0, BPF_CGROUP_DEVICE, &progCnt, NULL) < 0) { - VIR_DEBUG("failed to query cgroup progs"); + VIR_DEBUG("failed to query cgroup progs: %s", g_strerror(errno)); return false; } -- 2.39.5