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samples/bpf: adjust rlimit RLIMIT_MEMLOCK for xdp_redirect

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Default rlimit RLIMIT_MEMLOCK is 64KB, causes bpf map failure.
e.g.
[root@labbpf]# ./xdp_redirect $(</sys/class/net/eth2/ifindex) \
> $(</sys/class/net/eth3/ifindex)
failed to create a map: 1 Operation not permitted

The failure is seen when executing xdp_redirect while xdp_monitor
is already runnig.

Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Tushar Dave 2018-02-09 11:56:12 -08:00 committed by Alexei Starovoitov
parent 153e1b84f4
commit 8ac2441e0b
1 changed files with 7 additions and 0 deletions
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7
samples/bpf/xdp_redirect_user.c
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@ -20,6 +20,7 @@
#include <string.h> #include <string.h>
#include <unistd.h> #include <unistd.h>
#include <libgen.h> #include <libgen.h>
#include <sys/resource.h>
#include "bpf_load.h" #include "bpf_load.h"
#include "bpf_util.h" #include "bpf_util.h"
@ -75,6 +76,7 @@ static void usage(const char *prog)
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
const char *optstr = "SN"; const char *optstr = "SN";
char filename[256]; char filename[256];
int ret, opt, key = 0; int ret, opt, key = 0;
@ -98,6 +100,11 @@ int main(int argc, char **argv)
return 1; return 1;
} }
if (setrlimit(RLIMIT_MEMLOCK, &r)) {
perror("setrlimit(RLIMIT_MEMLOCK)");
return 1;
}
ifindex_in = strtoul(argv[optind], NULL, 0); ifindex_in = strtoul(argv[optind], NULL, 0);
ifindex_out = strtoul(argv[optind + 1], NULL, 0); ifindex_out = strtoul(argv[optind + 1], NULL, 0);
printf("input: %d output: %d\n", ifindex_in, ifindex_out); printf("input: %d output: %d\n", ifindex_in, ifindex_out);