From: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
To: bpf@vger.kernel.org
Cc: netdev@vger.kernel.org, daniel@iogearbox.net, ast@kernel.org,
Willem de Bruijn <willemb@google.com>
Subject: [PATCH bpf-next 3/3] selftests/bpf: test new __sk_buff field gso_size
Date: Tue, 3 Mar 2020 15:05:03 -0500 [thread overview]
Message-ID: <20200303200503.226217-4-willemdebruijn.kernel@gmail.com> (raw)
In-Reply-To: <20200303200503.226217-1-willemdebruijn.kernel@gmail.com>
From: Willem de Bruijn <willemb@google.com>
Analogous to the gso_segs selftests introduced in commit d9ff286a0f59
("bpf: allow BPF programs access skb_shared_info->gso_segs field").
Signed-off-by: Willem de Bruijn <willemb@google.com>
---
.../selftests/bpf/prog_tests/skb_ctx.c | 1 +
.../selftests/bpf/progs/test_skb_ctx.c | 2 +
.../testing/selftests/bpf/verifier/ctx_skb.c | 47 +++++++++++++++++++
3 files changed, 50 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/skb_ctx.c b/tools/testing/selftests/bpf/prog_tests/skb_ctx.c
index c6d6b685a946..4538bd08203f 100644
--- a/tools/testing/selftests/bpf/prog_tests/skb_ctx.c
+++ b/tools/testing/selftests/bpf/prog_tests/skb_ctx.c
@@ -14,6 +14,7 @@ void test_skb_ctx(void)
.wire_len = 100,
.gso_segs = 8,
.mark = 9,
+ .gso_size = 10,
};
struct bpf_prog_test_run_attr tattr = {
.data_in = &pkt_v4,
diff --git a/tools/testing/selftests/bpf/progs/test_skb_ctx.c b/tools/testing/selftests/bpf/progs/test_skb_ctx.c
index 202de3938494..b02ea589ce7e 100644
--- a/tools/testing/selftests/bpf/progs/test_skb_ctx.c
+++ b/tools/testing/selftests/bpf/progs/test_skb_ctx.c
@@ -23,6 +23,8 @@ int process(struct __sk_buff *skb)
return 1;
if (skb->gso_segs != 8)
return 1;
+ if (skb->gso_size != 10)
+ return 1;
return 0;
}
diff --git a/tools/testing/selftests/bpf/verifier/ctx_skb.c b/tools/testing/selftests/bpf/verifier/ctx_skb.c
index d438193804b2..2e16b8e268f2 100644
--- a/tools/testing/selftests/bpf/verifier/ctx_skb.c
+++ b/tools/testing/selftests/bpf/verifier/ctx_skb.c
@@ -1010,6 +1010,53 @@
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
+{
+ "read gso_size from CGROUP_SKB",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, gso_size)),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
+},
+{
+ "read gso_size from CGROUP_SKB",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_1,
+ offsetof(struct __sk_buff, gso_size)),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
+},
+{
+ "write gso_size from CGROUP_SKB",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, gso_size)),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .result = REJECT,
+ .result_unpriv = REJECT,
+ .errstr = "invalid bpf_context access off=176 size=4",
+ .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
+},
+{
+ "read gso_size from CLS",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, gso_size)),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_SCHED_CLS,
+},
{
"check wire_len is not readable by sockets",
.insns = {
--
2.25.0.265.gbab2e86ba0-goog
next prev parent reply other threads:[~2020-03-03 20:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-03 20:05 [PATCH bpf-next 0/3] add gso_size to __sk_buff Willem de Bruijn
2020-03-03 20:05 ` [PATCH bpf-next 1/3] bpf: " Willem de Bruijn
2020-03-03 20:05 ` [PATCH bpf-next 2/3] bpf: Sync uapi bpf.h to tools/ Willem de Bruijn
2020-03-03 20:05 ` Willem de Bruijn [this message]
2020-03-03 22:56 ` [PATCH bpf-next 0/3] add gso_size to __sk_buff Petar Penkov
2020-03-04 0:31 ` Alexei Starovoitov
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