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Date: Tue, 12 Jan 2021 00:09:40 +0100
From: Daniel Borkmann <daniel@...earbox.net>
To: ast@...nel.org
Cc: yhs@...com, bpf@...r.kernel.org, netdev@...r.kernel.org,
Daniel Borkmann <daniel@...earbox.net>
Subject: [PATCH bpf-next v2 2/2] bpf: extend bind v4/v6 selftests for mark/prio/bindtoifindex
Extend existing cgroup bind4/bind6 tests to add coverage for setting and
retrieving SO_MARK, SO_PRIORITY and SO_BINDTOIFINDEX at the bind hook.
Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
Acked-by: Yonghong Song <yhs@...com>
---
v1 -> v2: - Add comment on old vs new optval (Yonghong), rest as-is
.../testing/selftests/bpf/progs/bind4_prog.c | 42 +++++++++++++++++--
.../testing/selftests/bpf/progs/bind6_prog.c | 42 +++++++++++++++++--
2 files changed, 76 insertions(+), 8 deletions(-)
diff --git a/tools/testing/selftests/bpf/progs/bind4_prog.c b/tools/testing/selftests/bpf/progs/bind4_prog.c
index c6520f21f5f5..115a3b0ad984 100644
--- a/tools/testing/selftests/bpf/progs/bind4_prog.c
+++ b/tools/testing/selftests/bpf/progs/bind4_prog.c
@@ -29,18 +29,48 @@ static __inline int bind_to_device(struct bpf_sock_addr *ctx)
char veth2[IFNAMSIZ] = "test_sock_addr2";
char missing[IFNAMSIZ] = "nonexistent_dev";
char del_bind[IFNAMSIZ] = "";
+ int veth1_idx, veth2_idx;
if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTODEVICE,
- &veth1, sizeof(veth1)))
+ &veth1, sizeof(veth1)))
+ return 1;
+ if (bpf_getsockopt(ctx, SOL_SOCKET, SO_BINDTOIFINDEX,
+ &veth1_idx, sizeof(veth1_idx)) || !veth1_idx)
return 1;
if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTODEVICE,
- &veth2, sizeof(veth2)))
+ &veth2, sizeof(veth2)))
+ return 1;
+ if (bpf_getsockopt(ctx, SOL_SOCKET, SO_BINDTOIFINDEX,
+ &veth2_idx, sizeof(veth2_idx)) || !veth2_idx ||
+ veth1_idx == veth2_idx)
return 1;
if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTODEVICE,
- &missing, sizeof(missing)) != -ENODEV)
+ &missing, sizeof(missing)) != -ENODEV)
+ return 1;
+ if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTOIFINDEX,
+ &veth1_idx, sizeof(veth1_idx)))
return 1;
if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTODEVICE,
- &del_bind, sizeof(del_bind)))
+ &del_bind, sizeof(del_bind)))
+ return 1;
+
+ return 0;
+}
+
+static __inline int misc_opts(struct bpf_sock_addr *ctx, int opt)
+{
+ int old, tmp, new = 0xeb9f;
+
+ /* Socket in test case has guarantee that old never equals to new. */
+ if (bpf_getsockopt(ctx, SOL_SOCKET, opt, &old, sizeof(old)) ||
+ old == new)
+ return 1;
+ if (bpf_setsockopt(ctx, SOL_SOCKET, opt, &new, sizeof(new)))
+ return 1;
+ if (bpf_getsockopt(ctx, SOL_SOCKET, opt, &tmp, sizeof(tmp)) ||
+ tmp != new)
+ return 1;
+ if (bpf_setsockopt(ctx, SOL_SOCKET, opt, &old, sizeof(old)))
return 1;
return 0;
@@ -93,6 +123,10 @@ int bind_v4_prog(struct bpf_sock_addr *ctx)
if (bind_to_device(ctx))
return 0;
+ /* Test for misc socket options. */
+ if (misc_opts(ctx, SO_MARK) || misc_opts(ctx, SO_PRIORITY))
+ return 0;
+
ctx->user_ip4 = bpf_htonl(SERV4_REWRITE_IP);
ctx->user_port = bpf_htons(SERV4_REWRITE_PORT);
diff --git a/tools/testing/selftests/bpf/progs/bind6_prog.c b/tools/testing/selftests/bpf/progs/bind6_prog.c
index 4358e44dcf47..4c0d348034b9 100644
--- a/tools/testing/selftests/bpf/progs/bind6_prog.c
+++ b/tools/testing/selftests/bpf/progs/bind6_prog.c
@@ -35,18 +35,48 @@ static __inline int bind_to_device(struct bpf_sock_addr *ctx)
char veth2[IFNAMSIZ] = "test_sock_addr2";
char missing[IFNAMSIZ] = "nonexistent_dev";
char del_bind[IFNAMSIZ] = "";
+ int veth1_idx, veth2_idx;
if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTODEVICE,
- &veth1, sizeof(veth1)))
+ &veth1, sizeof(veth1)))
+ return 1;
+ if (bpf_getsockopt(ctx, SOL_SOCKET, SO_BINDTOIFINDEX,
+ &veth1_idx, sizeof(veth1_idx)) || !veth1_idx)
return 1;
if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTODEVICE,
- &veth2, sizeof(veth2)))
+ &veth2, sizeof(veth2)))
+ return 1;
+ if (bpf_getsockopt(ctx, SOL_SOCKET, SO_BINDTOIFINDEX,
+ &veth2_idx, sizeof(veth2_idx)) || !veth2_idx ||
+ veth1_idx == veth2_idx)
return 1;
if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTODEVICE,
- &missing, sizeof(missing)) != -ENODEV)
+ &missing, sizeof(missing)) != -ENODEV)
+ return 1;
+ if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTOIFINDEX,
+ &veth1_idx, sizeof(veth1_idx)))
return 1;
if (bpf_setsockopt(ctx, SOL_SOCKET, SO_BINDTODEVICE,
- &del_bind, sizeof(del_bind)))
+ &del_bind, sizeof(del_bind)))
+ return 1;
+
+ return 0;
+}
+
+static __inline int misc_opts(struct bpf_sock_addr *ctx, int opt)
+{
+ int old, tmp, new = 0xeb9f;
+
+ /* Socket in test case has guarantee that old never equals to new. */
+ if (bpf_getsockopt(ctx, SOL_SOCKET, opt, &old, sizeof(old)) ||
+ old == new)
+ return 1;
+ if (bpf_setsockopt(ctx, SOL_SOCKET, opt, &new, sizeof(new)))
+ return 1;
+ if (bpf_getsockopt(ctx, SOL_SOCKET, opt, &tmp, sizeof(tmp)) ||
+ tmp != new)
+ return 1;
+ if (bpf_setsockopt(ctx, SOL_SOCKET, opt, &old, sizeof(old)))
return 1;
return 0;
@@ -107,6 +137,10 @@ int bind_v6_prog(struct bpf_sock_addr *ctx)
if (bind_to_device(ctx))
return 0;
+ /* Test for misc socket options. */
+ if (misc_opts(ctx, SO_MARK) || misc_opts(ctx, SO_PRIORITY))
+ return 0;
+
ctx->user_ip6[0] = bpf_htonl(SERV6_REWRITE_IP_0);
ctx->user_ip6[1] = bpf_htonl(SERV6_REWRITE_IP_1);
ctx->user_ip6[2] = bpf_htonl(SERV6_REWRITE_IP_2);
--
2.21.0
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