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bpf: Fix test_bpf_obj_id() when the bpf_jit_enable sysctl is diabled 

test_bpf_obj_id() should not expect a non zero jited_prog_len
to be returned by bpf_obj_get_info_by_fd() when
net.core.bpf_jit_enable is 0.

The patch checks for net.core.bpf_jit_enable and
has different expectation on jited_prog_len.

This patch also removes the pwd.h header which I forgot
to remove after making changes.

Fixes: 95b9afd398 ("bpf: Test for bpf ID")
Reported-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin KaFai Lau 2017-06-08 22:30:16 -07:00 committed by David S. Miller
parent 97a7a37a7b
commit fad07430bc
1 changed files with 15 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
tools/testing/selftests/bpf/test_progs.c
View File

@ -23,7 +23,7 @@ typedef __u16 __sum16;
#include <sys/wait.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <pwd.h>
#include <fcntl.h>
#include <linux/bpf.h>
#include <linux/err.h>
@ -297,6 +297,7 @@ static void test_bpf_obj_id(void)
const __u32 array_key = 0;
const int nr_iters = 2;
const char *file = "./test_obj_id.o";
const char *jit_sysctl = "/proc/sys/net/core/bpf_jit_enable";
struct bpf_object *objs[nr_iters];
int prog_fds[nr_iters], map_fds[nr_iters];
@ -305,9 +306,18 @@ static void test_bpf_obj_id(void)
struct bpf_map_info map_infos[nr_iters + 1];
char jited_insns[128], xlated_insns[128];
__u32 i, next_id, info_len, nr_id_found, duration = 0;
int err = 0;
int sysctl_fd, jit_enabled = 0, err = 0;
__u64 array_value;
sysctl_fd = open(jit_sysctl, 0, O_RDONLY);
if (sysctl_fd != -1) {
char tmpc;
if (read(sysctl_fd, &tmpc, sizeof(tmpc)) == 1)
jit_enabled = (tmpc != '0');
close(sysctl_fd);
}
err = bpf_prog_get_fd_by_id(0);
CHECK(err >= 0 || errno != ENOENT,
"get-fd-by-notexist-prog-id", "err %d errno %d\n", err, errno);
@ -339,13 +349,14 @@ static void test_bpf_obj_id(void)
if (CHECK(err ||
prog_infos[i].type != BPF_PROG_TYPE_SOCKET_FILTER ||
info_len != sizeof(struct bpf_prog_info) ||
!prog_infos[i].jited_prog_len ||
(jit_enabled && !prog_infos[i].jited_prog_len) ||
!prog_infos[i].xlated_prog_len,
"get-prog-info(fd)",
"err %d errno %d i %d type %d(%d) info_len %u(%lu) jited_prog_len %u xlated_prog_len %u\n",
"err %d errno %d i %d type %d(%d) info_len %u(%lu) jit_enabled %d jited_prog_len %u xlated_prog_len %u\n",
err, errno, i,
prog_infos[i].type, BPF_PROG_TYPE_SOCKET_FILTER,
info_len, sizeof(struct bpf_prog_info),
jit_enabled,
prog_infos[i].jited_prog_len,
prog_infos[i].xlated_prog_len))
goto done;