leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

selftests/bpf: Test new __sk_buff field hwtstamp

Browse Source 
Analogous to the gso_segs selftests introduced in commit d9ff286a0f
("bpf: allow BPF programs access skb_shared_info->gso_segs field").

Signed-off-by: Vadim Fedorenko <vfedorenko@novek.ru>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20210909220409.8804-3-vfedorenko@novek.ru
This commit is contained in:
Vadim Fedorenko
2021-09-10 01:04:09 +03:00
committed by Daniel Borkmann
parent f64c4acea5
commit 3384c7c764
5 changed files with 72 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
tools/testing/selftests/bpf/prog_tests/skb_ctx.c
View File

@@ -18,6 +18,7 @@ void test_skb_ctx(void)
.gso_segs = 8,
.mark = 9,
.gso_size = 10,
.hwtstamp = 11,
};
struct bpf_prog_test_run_attr tattr = {
.data_in = &pkt_v4,

2
tools/testing/selftests/bpf/progs/test_skb_ctx.c
View File

@@ -29,6 +29,8 @@ int process(struct __sk_buff *skb)
return 1;
if (skb->ifindex != 1)
return 1;
if (skb->hwtstamp != 11)
return 1;
return 0;
}

60
tools/testing/selftests/bpf/verifier/ctx_skb.c
View File

@@ -1057,6 +1057,66 @@
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
"padding after gso_size is not accessible",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
offsetofend(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=180 size=4",
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
},
{
"read hwtstamp from CGROUP_SKB",
.insns = {
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1,
offsetof(struct __sk_buff, hwtstamp)),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
},
{
"read hwtstamp from CGROUP_SKB",
.insns = {
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1,
offsetof(struct __sk_buff, hwtstamp)),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
},
{
"write hwtstamp from CGROUP_SKB",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
offsetof(struct __sk_buff, hwtstamp)),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.result = REJECT,
.result_unpriv = REJECT,
.errstr = "invalid bpf_context access off=184 size=8",
.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
},
{
"read hwtstamp from CLS",
.insns = {
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1,
offsetof(struct __sk_buff, hwtstamp)),
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 = {