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authorMaciej Fijalkowski <maciejromanfijalkowski@gmail.com>2019-02-01 22:42:26 +0100
committerDaniel Borkmann <daniel@iogearbox.net>2019-02-01 23:37:51 +0100
commit6a5457618f62147aeac706d26ff28e0e57a324e3 (patch)
tree245cfdab823957b6dcdc0cdf2ad8432be72d9857 /samples
parentbbaf6029c49ccf2dc93d9564af58a20d125947a1 (diff)
downloadlinux-stericsson-6a5457618f62147aeac706d26ff28e0e57a324e3.tar.gz
samples/bpf: Extend RLIMIT_MEMLOCK for xdp_{sample_pkts, router_ipv4}
There is a common problem with xdp samples that happens when user wants to run a particular sample and some bpf program is already loaded. The default 64kb RLIMIT_MEMLOCK resource limit will cause a following error (assuming that xdp sample that is failing was converted to libbpf usage): libbpf: Error in bpf_object__probe_name():Operation not permitted(1). Couldn't load basic 'r0 = 0' BPF program. libbpf: failed to load object './xdp_sample_pkts_kern.o' Fix it in xdp_sample_pkts and xdp_router_ipv4 by setting RLIMIT_MEMLOCK to RLIM_INFINITY. Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'samples')
-rw-r--r--samples/bpf/xdp_router_ipv4_user.c7
-rw-r--r--samples/bpf/xdp_sample_pkts_user.c7
2 files changed, 14 insertions, 0 deletions
diff --git a/samples/bpf/xdp_router_ipv4_user.c b/samples/bpf/xdp_router_ipv4_user.c
index cea2306f5ab7..c63c6beec7d6 100644
--- a/samples/bpf/xdp_router_ipv4_user.c
+++ b/samples/bpf/xdp_router_ipv4_user.c
@@ -25,6 +25,7 @@
#include <sys/syscall.h>
#include "bpf_util.h"
#include "bpf/libbpf.h"
+#include <sys/resource.h>
int sock, sock_arp, flags = 0;
static int total_ifindex;
@@ -609,6 +610,7 @@ cleanup:
int main(int ac, char **argv)
{
+ struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
struct bpf_prog_load_attr prog_load_attr = {
.prog_type = BPF_PROG_TYPE_XDP,
};
@@ -635,6 +637,11 @@ int main(int ac, char **argv)
ifname_list = (argv + 1);
}
+ if (setrlimit(RLIMIT_MEMLOCK, &r)) {
+ perror("setrlimit(RLIMIT_MEMLOCK)");
+ return 1;
+ }
+
if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd))
return 1;
diff --git a/samples/bpf/xdp_sample_pkts_user.c b/samples/bpf/xdp_sample_pkts_user.c
index 8dd87c1eb560..5f5828ee0761 100644
--- a/samples/bpf/xdp_sample_pkts_user.c
+++ b/samples/bpf/xdp_sample_pkts_user.c
@@ -12,6 +12,7 @@
#include <signal.h>
#include <libbpf.h>
#include <bpf/bpf.h>
+#include <sys/resource.h>
#include "perf-sys.h"
#include "trace_helpers.h"
@@ -99,6 +100,7 @@ static void sig_handler(int signo)
int main(int argc, char **argv)
{
+ struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
struct bpf_prog_load_attr prog_load_attr = {
.prog_type = BPF_PROG_TYPE_XDP,
};
@@ -114,6 +116,11 @@ int main(int argc, char **argv)
return 1;
}
+ if (setrlimit(RLIMIT_MEMLOCK, &r)) {
+ perror("setrlimit(RLIMIT_MEMLOCK)");
+ return 1;
+ }
+
numcpus = get_nprocs();
if (numcpus > MAX_CPUS)
numcpus = MAX_CPUS;