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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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82cb2b3077
This patch removes the libcap usage from test_progs. bind_perm.c is the only user. cap_*_effective() helpers added in the earlier patch are directly used instead. No other selftest binary is using libcap, so '-lcap' is also removed from the Makefile. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Reviewed-by: Stanislav Fomichev <sdf@google.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20220316173835.2039334-1-kafai@fb.com
95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#define _GNU_SOURCE
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#include <sched.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include "test_progs.h"
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#include "cap_helpers.h"
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#include "bind_perm.skel.h"
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static int duration;
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static int create_netns(void)
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{
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if (!ASSERT_OK(unshare(CLONE_NEWNET), "create netns"))
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return -1;
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return 0;
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}
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void try_bind(int family, int port, int expected_errno)
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{
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struct sockaddr_storage addr = {};
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struct sockaddr_in6 *sin6;
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struct sockaddr_in *sin;
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int fd = -1;
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fd = socket(family, SOCK_STREAM, 0);
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if (CHECK(fd < 0, "fd", "errno %d", errno))
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goto close_socket;
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if (family == AF_INET) {
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sin = (struct sockaddr_in *)&addr;
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sin->sin_family = family;
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sin->sin_port = htons(port);
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} else {
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sin6 = (struct sockaddr_in6 *)&addr;
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sin6->sin6_family = family;
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sin6->sin6_port = htons(port);
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}
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errno = 0;
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bind(fd, (struct sockaddr *)&addr, sizeof(addr));
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ASSERT_EQ(errno, expected_errno, "bind");
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close_socket:
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if (fd >= 0)
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close(fd);
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}
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void test_bind_perm(void)
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{
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const __u64 net_bind_svc_cap = 1ULL << CAP_NET_BIND_SERVICE;
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struct bind_perm *skel;
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__u64 old_caps = 0;
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int cgroup_fd;
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if (create_netns())
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return;
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cgroup_fd = test__join_cgroup("/bind_perm");
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if (CHECK(cgroup_fd < 0, "cg-join", "errno %d", errno))
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return;
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skel = bind_perm__open_and_load();
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if (!ASSERT_OK_PTR(skel, "skel"))
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goto close_cgroup_fd;
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skel->links.bind_v4_prog = bpf_program__attach_cgroup(skel->progs.bind_v4_prog, cgroup_fd);
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if (!ASSERT_OK_PTR(skel, "bind_v4_prog"))
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goto close_skeleton;
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skel->links.bind_v6_prog = bpf_program__attach_cgroup(skel->progs.bind_v6_prog, cgroup_fd);
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if (!ASSERT_OK_PTR(skel, "bind_v6_prog"))
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goto close_skeleton;
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ASSERT_OK(cap_disable_effective(net_bind_svc_cap, &old_caps),
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"cap_disable_effective");
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try_bind(AF_INET, 110, EACCES);
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try_bind(AF_INET6, 110, EACCES);
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try_bind(AF_INET, 111, 0);
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try_bind(AF_INET6, 111, 0);
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if (old_caps & net_bind_svc_cap)
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ASSERT_OK(cap_enable_effective(net_bind_svc_cap, NULL),
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"cap_enable_effective");
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close_skeleton:
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bind_perm__destroy(skel);
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close_cgroup_fd:
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close(cgroup_fd);
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}
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