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Miller" , netdev@vger.kernel.org, Petar Penkov , Lingpeng Chen Subject: [PATCH v3 bpf-next 3/3] selftests/bpf: add selftest for get_netns_id helper Date: Thu, 20 Feb 2020 07:10:54 +0000 Message-Id: <20200220071054.12499-4-forrest0579@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200220071054.12499-1-forrest0579@gmail.com> References: <07e2568e-0256-29f5-1656-1ac80a69f229@iogearbox.net> <20200220071054.12499-1-forrest0579@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org adding selftest for new bpf helper function get_netns_id Signed-off-by: Lingpeng Chen --- .../selftests/bpf/progs/test_tcpbpf_kern.c | 11 +++++ .../testing/selftests/bpf/test_tcpbpf_user.c | 46 ++++++++++++++++++- 2 files changed, 56 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c b/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c index 1f1966e86e9f..d7d851ddd2cc 100644 --- a/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c +++ b/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c @@ -28,6 +28,13 @@ struct { __type(value, int); } sockopt_results SEC(".maps"); +struct { + __uint(type, BPF_MAP_TYPE_ARRAY); + __uint(max_entries, 1); + __type(key, __u32); + __type(value, __u64); +} netns_number SEC(".maps"); + static inline void update_event_map(int event) { __u32 key = 0; @@ -61,6 +68,7 @@ int bpf_testcb(struct bpf_sock_ops *skops) int rv = -1; int v = 0; int op; + __u64 netns_id; op = (int) skops->op; @@ -144,6 +152,9 @@ int bpf_testcb(struct bpf_sock_ops *skops) __u32 key = 0; bpf_map_update_elem(&sockopt_results, &key, &v, BPF_ANY); + + netns_id = bpf_get_netns_id(skops); + bpf_map_update_elem(&netns_number, &key, &netns_id, BPF_ANY); break; default: rv = -1; diff --git a/tools/testing/selftests/bpf/test_tcpbpf_user.c b/tools/testing/selftests/bpf/test_tcpbpf_user.c index 3ae127620463..fef2f4d77ecc 100644 --- a/tools/testing/selftests/bpf/test_tcpbpf_user.c +++ b/tools/testing/selftests/bpf/test_tcpbpf_user.c @@ -76,6 +76,41 @@ int verify_sockopt_result(int sock_map_fd) return ret; } +int verify_netns(__u64 netns_id) +{ + char buf1[40]; + char buf2[40]; + int ret = 0; + ssize_t len = 0; + + len = readlink("/proc/self/ns/net", buf1, 39); + sprintf(buf2, "net:[%llu]", netns_id); + + if (len <= 0) { + printf("FAILED: readlink /proc/self/ns/net"); + return ret; + } + + if (strncmp(buf1, buf2, len)) { + printf("FAILED: netns don't match"); + ret = 1; + } + return ret; +} + +int verify_netns_result(int netns_map_fd) +{ + __u32 key = 0; + __u64 res = 0; + int ret = 0; + int rv; + + rv = bpf_map_lookup_elem(netns_map_fd, &key, &res); + EXPECT_EQ(0, rv, "d"); + + return verify_netns(res); +} + static int bpf_find_map(const char *test, struct bpf_object *obj, const char *name) { @@ -92,7 +127,7 @@ static int bpf_find_map(const char *test, struct bpf_object *obj, int main(int argc, char **argv) { const char *file = "test_tcpbpf_kern.o"; - int prog_fd, map_fd, sock_map_fd; + int prog_fd, map_fd, sock_map_fd, netns_map_fd; struct tcpbpf_globals g = {0}; const char *cg_path = "/foo"; int error = EXIT_FAILURE; @@ -137,6 +172,10 @@ int main(int argc, char **argv) if (sock_map_fd < 0) goto err; + netns_map_fd = bpf_find_map(__func__, obj, "netns_number"); + if (netns_map_fd < 0) + goto err; + retry_lookup: rv = bpf_map_lookup_elem(map_fd, &key, &g); if (rv != 0) { @@ -161,6 +200,11 @@ int main(int argc, char **argv) goto err; } + if (verify_netns_result(netns_map_fd)) { + printf("FAILED: Wrong netns stats\n"); + goto err; + } + printf("PASSED!\n"); error = 0; err: -- 2.20.1