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| author | Maciej Fijalkowski <maciejromanfijalkowski@gmail.com> | 2019-02-02 00:42:26 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-02-02 01:37:51 +0300 |
| commit | 6a5457618f62147aeac706d26ff28e0e57a324e3 (patch) | |
| tree | 245cfdab823957b6dcdc0cdf2ad8432be72d9857 /samples/bpf | |
| parent | bbaf6029c49ccf2dc93d9564af58a20d125947a1 (diff) | |
| download | linux-6a5457618f62147aeac706d26ff28e0e57a324e3.tar.xz | |
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/bpf')
| -rw-r--r-- | samples/bpf/xdp_router_ipv4_user.c | 7 | ||||
| -rw-r--r-- | samples/bpf/xdp_sample_pkts_user.c | 7 |
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; |