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ip vrf: Improve bpf error messages 

Next up a non-root user gets various bpf related error messages:

$ ip vrf exec mgmt bash
Failed to load BPF prog: 'Operation not permitted'
Kernel compiled with CGROUP_BPF enabled?

Catch the EPERM error and do not show the kernel config option.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
This commit is contained in:
David Ahern 2017-01-05 16:22:23 -08:00 committed by Stephen Hemminger
parent 2bbc5b0726
commit 9b036afd3c
1 changed files with 5 additions and 1 deletions
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6
ip/ipvrf.c
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@ -181,7 +181,11 @@ static int vrf_configure_cgroup(const char *path, int ifindex)
if (prog_fd < 0) { if (prog_fd < 0) {
fprintf(stderr, "Failed to load BPF prog: '%s'\n", fprintf(stderr, "Failed to load BPF prog: '%s'\n",
strerror(errno)); strerror(errno));
fprintf(stderr, "Kernel compiled with CGROUP_BPF enabled?\n");
if (errno != EPERM) {
fprintf(stderr,
"Kernel compiled with CGROUP_BPF enabled?\n");
}
goto out; goto out;
} }