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tools/bpf: Add bpf_map_lookup_elem selftest for xskmap 

Check that bpf_map_lookup_elem lookup and structure
access operats correctly.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jonathan Lemon 2019-06-06 13:59:42 -07:00 committed by Alexei Starovoitov
parent 91eda5998c
commit 940e7be34a
1 changed files with 18 additions and 0 deletions
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18
tools/testing/selftests/bpf/verifier/sock.c
View File

@ -498,3 +498,21 @@
.result = REJECT,
.errstr = "cannot pass map_type 24 into func bpf_map_lookup_elem",
},
{
"bpf_map_lookup_elem(xskmap, &key); xs->queue_id",
.insns = {
BPF_ST_MEM(BPF_W, BPF_REG_10, -8, 0),
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_LD_MAP_FD(BPF_REG_1, 0),
BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
BPF_EXIT_INSN(),
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_0, offsetof(struct bpf_xdp_sock, queue_id)),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.fixup_map_xskmap = { 3 },
.prog_type = BPF_PROG_TYPE_XDP,
.result = ACCEPT,
},