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Diffstat (limited to '')
-rw-r--r-- | src/core/bpf-util.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/core/bpf-util.c b/src/core/bpf-util.c new file mode 100644 index 0000000..84170da --- /dev/null +++ b/src/core/bpf-util.c @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include "bpf-dlopen.h" +#include "bpf-util.h" +#include "cgroup-util.h" +#include "log.h" + +bool cgroup_bpf_supported(void) { + static int supported = -1; + int r; + + if (supported >= 0) + return supported; + + r = cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER); + if (r < 0) { + log_warning_errno(r, "Can't determine whether the unified hierarchy is used: %m"); + return (supported = false); + } + + if (r == 0) { + log_info_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), + "Not running with unified cgroup hierarchy, disabling cgroup BPF features."); + return (supported = false); + } + + r = dlopen_bpf(); + if (r < 0) { + log_full_errno(in_initrd() ? LOG_DEBUG : LOG_INFO, + r, "Failed to open libbpf, cgroup BPF features disabled: %m"); + return (supported = false); + } + + return (supported = true); +} |