diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/bpf/prog_tests/sockopt_multi.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/sockopt_multi.c')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/sockopt_multi.c | 333 |
1 files changed, 333 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/sockopt_multi.c b/tools/testing/selftests/bpf/prog_tests/sockopt_multi.c new file mode 100644 index 000000000..51fac975b --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/sockopt_multi.c @@ -0,0 +1,333 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <test_progs.h> +#include "cgroup_helpers.h" + +static int prog_attach(struct bpf_object *obj, int cgroup_fd, const char *title) +{ + enum bpf_attach_type attach_type; + enum bpf_prog_type prog_type; + struct bpf_program *prog; + int err; + + err = libbpf_prog_type_by_name(title, &prog_type, &attach_type); + if (err) { + log_err("Failed to deduct types for %s BPF program", title); + return -1; + } + + prog = bpf_object__find_program_by_title(obj, title); + if (!prog) { + log_err("Failed to find %s BPF program", title); + return -1; + } + + err = bpf_prog_attach(bpf_program__fd(prog), cgroup_fd, + attach_type, BPF_F_ALLOW_MULTI); + if (err) { + log_err("Failed to attach %s BPF program", title); + return -1; + } + + return 0; +} + +static int prog_detach(struct bpf_object *obj, int cgroup_fd, const char *title) +{ + enum bpf_attach_type attach_type; + enum bpf_prog_type prog_type; + struct bpf_program *prog; + int err; + + err = libbpf_prog_type_by_name(title, &prog_type, &attach_type); + if (err) + return -1; + + prog = bpf_object__find_program_by_title(obj, title); + if (!prog) + return -1; + + err = bpf_prog_detach2(bpf_program__fd(prog), cgroup_fd, + attach_type); + if (err) + return -1; + + return 0; +} + +static int run_getsockopt_test(struct bpf_object *obj, int cg_parent, + int cg_child, int sock_fd) +{ + socklen_t optlen; + __u8 buf; + int err; + + /* Set IP_TOS to the expected value (0x80). */ + + buf = 0x80; + err = setsockopt(sock_fd, SOL_IP, IP_TOS, &buf, 1); + if (err < 0) { + log_err("Failed to call setsockopt(IP_TOS)"); + goto detach; + } + + buf = 0x00; + optlen = 1; + err = getsockopt(sock_fd, SOL_IP, IP_TOS, &buf, &optlen); + if (err) { + log_err("Failed to call getsockopt(IP_TOS)"); + goto detach; + } + + if (buf != 0x80) { + log_err("Unexpected getsockopt 0x%x != 0x80 without BPF", buf); + err = -1; + goto detach; + } + + /* Attach child program and make sure it returns new value: + * - kernel: -> 0x80 + * - child: 0x80 -> 0x90 + */ + + err = prog_attach(obj, cg_child, "cgroup/getsockopt/child"); + if (err) + goto detach; + + buf = 0x00; + optlen = 1; + err = getsockopt(sock_fd, SOL_IP, IP_TOS, &buf, &optlen); + if (err) { + log_err("Failed to call getsockopt(IP_TOS)"); + goto detach; + } + + if (buf != 0x90) { + log_err("Unexpected getsockopt 0x%x != 0x90", buf); + err = -1; + goto detach; + } + + /* Attach parent program and make sure it returns new value: + * - kernel: -> 0x80 + * - child: 0x80 -> 0x90 + * - parent: 0x90 -> 0xA0 + */ + + err = prog_attach(obj, cg_parent, "cgroup/getsockopt/parent"); + if (err) + goto detach; + + buf = 0x00; + optlen = 1; + err = getsockopt(sock_fd, SOL_IP, IP_TOS, &buf, &optlen); + if (err) { + log_err("Failed to call getsockopt(IP_TOS)"); + goto detach; + } + + if (buf != 0xA0) { + log_err("Unexpected getsockopt 0x%x != 0xA0", buf); + err = -1; + goto detach; + } + + /* Setting unexpected initial sockopt should return EPERM: + * - kernel: -> 0x40 + * - child: unexpected 0x40, EPERM + * - parent: unexpected 0x40, EPERM + */ + + buf = 0x40; + err = setsockopt(sock_fd, SOL_IP, IP_TOS, &buf, 1); + if (err < 0) { + log_err("Failed to call setsockopt(IP_TOS)"); + goto detach; + } + + buf = 0x00; + optlen = 1; + err = getsockopt(sock_fd, SOL_IP, IP_TOS, &buf, &optlen); + if (!err) { + log_err("Unexpected success from getsockopt(IP_TOS)"); + goto detach; + } + + /* Detach child program and make sure we still get EPERM: + * - kernel: -> 0x40 + * - parent: unexpected 0x40, EPERM + */ + + err = prog_detach(obj, cg_child, "cgroup/getsockopt/child"); + if (err) { + log_err("Failed to detach child program"); + goto detach; + } + + buf = 0x00; + optlen = 1; + err = getsockopt(sock_fd, SOL_IP, IP_TOS, &buf, &optlen); + if (!err) { + log_err("Unexpected success from getsockopt(IP_TOS)"); + goto detach; + } + + /* Set initial value to the one the parent program expects: + * - kernel: -> 0x90 + * - parent: 0x90 -> 0xA0 + */ + + buf = 0x90; + err = setsockopt(sock_fd, SOL_IP, IP_TOS, &buf, 1); + if (err < 0) { + log_err("Failed to call setsockopt(IP_TOS)"); + goto detach; + } + + buf = 0x00; + optlen = 1; + err = getsockopt(sock_fd, SOL_IP, IP_TOS, &buf, &optlen); + if (err) { + log_err("Failed to call getsockopt(IP_TOS)"); + goto detach; + } + + if (buf != 0xA0) { + log_err("Unexpected getsockopt 0x%x != 0xA0", buf); + err = -1; + goto detach; + } + +detach: + prog_detach(obj, cg_child, "cgroup/getsockopt/child"); + prog_detach(obj, cg_parent, "cgroup/getsockopt/parent"); + + return err; +} + +static int run_setsockopt_test(struct bpf_object *obj, int cg_parent, + int cg_child, int sock_fd) +{ + socklen_t optlen; + __u8 buf; + int err; + + /* Set IP_TOS to the expected value (0x80). */ + + buf = 0x80; + err = setsockopt(sock_fd, SOL_IP, IP_TOS, &buf, 1); + if (err < 0) { + log_err("Failed to call setsockopt(IP_TOS)"); + goto detach; + } + + buf = 0x00; + optlen = 1; + err = getsockopt(sock_fd, SOL_IP, IP_TOS, &buf, &optlen); + if (err) { + log_err("Failed to call getsockopt(IP_TOS)"); + goto detach; + } + + if (buf != 0x80) { + log_err("Unexpected getsockopt 0x%x != 0x80 without BPF", buf); + err = -1; + goto detach; + } + + /* Attach child program and make sure it adds 0x10. */ + + err = prog_attach(obj, cg_child, "cgroup/setsockopt"); + if (err) + goto detach; + + buf = 0x80; + err = setsockopt(sock_fd, SOL_IP, IP_TOS, &buf, 1); + if (err < 0) { + log_err("Failed to call setsockopt(IP_TOS)"); + goto detach; + } + + buf = 0x00; + optlen = 1; + err = getsockopt(sock_fd, SOL_IP, IP_TOS, &buf, &optlen); + if (err) { + log_err("Failed to call getsockopt(IP_TOS)"); + goto detach; + } + + if (buf != 0x80 + 0x10) { + log_err("Unexpected getsockopt 0x%x != 0x80 + 0x10", buf); + err = -1; + goto detach; + } + + /* Attach parent program and make sure it adds another 0x10. */ + + err = prog_attach(obj, cg_parent, "cgroup/setsockopt"); + if (err) + goto detach; + + buf = 0x80; + err = setsockopt(sock_fd, SOL_IP, IP_TOS, &buf, 1); + if (err < 0) { + log_err("Failed to call setsockopt(IP_TOS)"); + goto detach; + } + + buf = 0x00; + optlen = 1; + err = getsockopt(sock_fd, SOL_IP, IP_TOS, &buf, &optlen); + if (err) { + log_err("Failed to call getsockopt(IP_TOS)"); + goto detach; + } + + if (buf != 0x80 + 2 * 0x10) { + log_err("Unexpected getsockopt 0x%x != 0x80 + 2 * 0x10", buf); + err = -1; + goto detach; + } + +detach: + prog_detach(obj, cg_child, "cgroup/setsockopt"); + prog_detach(obj, cg_parent, "cgroup/setsockopt"); + + return err; +} + +void test_sockopt_multi(void) +{ + struct bpf_prog_load_attr attr = { + .file = "./sockopt_multi.o", + }; + int cg_parent = -1, cg_child = -1; + struct bpf_object *obj = NULL; + int sock_fd = -1; + int err = -1; + int ignored; + + cg_parent = test__join_cgroup("/parent"); + if (CHECK_FAIL(cg_parent < 0)) + goto out; + + cg_child = test__join_cgroup("/parent/child"); + if (CHECK_FAIL(cg_child < 0)) + goto out; + + err = bpf_prog_load_xattr(&attr, &obj, &ignored); + if (CHECK_FAIL(err)) + goto out; + + sock_fd = socket(AF_INET, SOCK_STREAM, 0); + if (CHECK_FAIL(sock_fd < 0)) + goto out; + + CHECK_FAIL(run_getsockopt_test(obj, cg_parent, cg_child, sock_fd)); + CHECK_FAIL(run_setsockopt_test(obj, cg_parent, cg_child, sock_fd)); + +out: + close(sock_fd); + bpf_object__close(obj); + close(cg_child); + close(cg_parent); +} |