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| author | Alexei Starovoitov <ast@fb.com> | 2017-10-03 07:50:28 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-05 01:05:06 +0200 |
| commit | dfc069998ebb010f910dfec379dab4f44d331980 (patch) | |
| tree | acf9f59186489d8313ae416c3bc10b3e6bf97b1a /samples/bpf | |
| parent | libbpf: add support for BPF_PROG_QUERY (diff) | |
| download | linux-dfc069998ebb010f910dfec379dab4f44d331980.tar.xz linux-dfc069998ebb010f910dfec379dab4f44d331980.zip | |
samples/bpf: use bpf_prog_query() interface
use BPF_PROG_QUERY command to strengthen test coverage
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf')
| -rw-r--r-- | samples/bpf/test_cgrp2_attach2.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/samples/bpf/test_cgrp2_attach2.c b/samples/bpf/test_cgrp2_attach2.c index 9a9f6836e5e9..3e8232cc04a8 100644 --- a/samples/bpf/test_cgrp2_attach2.c +++ b/samples/bpf/test_cgrp2_attach2.c @@ -236,6 +236,7 @@ static int prog_load_cnt(int verdict, int val) static int test_multiprog(void) { + __u32 prog_ids[4], prog_cnt = 0, attach_flags, saved_prog_id; int cg1 = 0, cg2 = 0, cg3 = 0, cg4 = 0, cg5 = 0, key = 0; int drop_prog, allow_prog[6] = {}, rc = 0; unsigned long long value; @@ -304,6 +305,32 @@ static int test_multiprog(void) assert(bpf_map_lookup_elem(map_fd, &key, &value) == 0); assert(value == 1 + 2 + 8 + 32); + /* query the number of effective progs in cg5 */ + assert(bpf_prog_query(cg5, BPF_CGROUP_INET_EGRESS, BPF_F_QUERY_EFFECTIVE, + NULL, NULL, &prog_cnt) == 0); + assert(prog_cnt == 4); + /* retrieve prog_ids of effective progs in cg5 */ + assert(bpf_prog_query(cg5, BPF_CGROUP_INET_EGRESS, BPF_F_QUERY_EFFECTIVE, + &attach_flags, prog_ids, &prog_cnt) == 0); + assert(prog_cnt == 4); + assert(attach_flags == 0); + saved_prog_id = prog_ids[0]; + /* check enospc handling */ + prog_ids[0] = 0; + prog_cnt = 2; + assert(bpf_prog_query(cg5, BPF_CGROUP_INET_EGRESS, BPF_F_QUERY_EFFECTIVE, + &attach_flags, prog_ids, &prog_cnt) == -1 && + errno == ENOSPC); + assert(prog_cnt == 4); + /* check that prog_ids are returned even when buffer is too small */ + assert(prog_ids[0] == saved_prog_id); + /* retrieve prog_id of single attached prog in cg5 */ + prog_ids[0] = 0; + assert(bpf_prog_query(cg5, BPF_CGROUP_INET_EGRESS, 0, + NULL, prog_ids, &prog_cnt) == 0); + assert(prog_cnt == 1); + assert(prog_ids[0] == saved_prog_id); + /* detach bottom program and ping again */ if (bpf_prog_detach2(-1, cg5, BPF_CGROUP_INET_EGRESS)) { log_err("Detaching prog from cg5"); @@ -341,6 +368,15 @@ static int test_multiprog(void) assert(system(PING_CMD) == 0); assert(bpf_map_lookup_elem(map_fd, &key, &value) == 0); assert(value == 1 + 2 + 4); + + prog_cnt = 4; + assert(bpf_prog_query(cg5, BPF_CGROUP_INET_EGRESS, BPF_F_QUERY_EFFECTIVE, + &attach_flags, prog_ids, &prog_cnt) == 0); + assert(prog_cnt == 3); + assert(attach_flags == 0); + assert(bpf_prog_query(cg5, BPF_CGROUP_INET_EGRESS, 0, + NULL, prog_ids, &prog_cnt) == 0); + assert(prog_cnt == 0); goto out; err: rc = 1; |