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Merge pull request #3909 from petris/bpf_enosys_warn

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bpf: simplify detection if BPF is supported
This commit is contained in:
Christian Brauner
2021-07-21 15:25:36 +02:00
committed by GitHub
parent 669953fbd1 7bf85dd20e
commit b9327b7f92
1 changed files with 4 additions and 0 deletions
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4
src/lxc/cgroups/cgroup2_devices.c
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@@ -538,6 +538,10 @@ bool bpf_devices_cgroup_supported(void)
return log_trace(false,
"The bpf device cgroup requires real root");
ret = bpf(BPF_PROG_LOAD, NULL, sizeof(union bpf_attr));
if (ret < 0 && errno == ENOSYS)
return log_trace(false, "The bpf syscall is not available");
prog = bpf_program_new(BPF_PROG_TYPE_CGROUP_DEVICE);
if (!prog)
return log_trace(false, "Failed to allocate new bpf device cgroup program");