[PATCH iproute2 3/3] ip vrf: Improve bpf error messages

[David Ahern]

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 <d...@cumulusnetworks.com>
---
 ip/ipvrf.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ip/ipvrf.c b/ip/ipvrf.c
index dc8364a43a57..8bd99d6251f2 100644
--- a/ip/ipvrf.c
+++ b/ip/ipvrf.c
@@ -181,7 +181,11 @@ static int vrf_configure_cgroup(const char *path, int 
ifindex)
        if (prog_fd < 0) {
                fprintf(stderr, "Failed to load BPF prog: '%s'\n",
                        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;
        }
 
-- 
2.1.4