selftests/bpf: Test narrow loads with off > 0 for bpf_sock_addr
Add more test cases for context bpf_sock_addr to test narrow loads with offset > 0 for ctx->user_ip4 field (__u32): * off=1, size=1; * off=2, size=1; * off=3, size=1; * off=2, size=2. Signed-off-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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@ -574,24 +574,44 @@ static int bind4_prog_load(const struct sock_addr_test *test)
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/* if (sk.family == AF_INET && */
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BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
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offsetof(struct bpf_sock_addr, family)),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, AF_INET, 16),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, AF_INET, 24),
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/* (sk.type == SOCK_DGRAM || sk.type == SOCK_STREAM) && */
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BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
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offsetof(struct bpf_sock_addr, type)),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, SOCK_DGRAM, 1),
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BPF_JMP_A(1),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, SOCK_STREAM, 12),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, SOCK_STREAM, 20),
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/* 1st_byte_of_user_ip4 == expected && */
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BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,
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offsetof(struct bpf_sock_addr, user_ip4)),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[0], 10),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[0], 18),
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/* 2nd_byte_of_user_ip4 == expected && */
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BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,
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offsetof(struct bpf_sock_addr, user_ip4) + 1),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[1], 16),
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/* 3rd_byte_of_user_ip4 == expected && */
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BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,
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offsetof(struct bpf_sock_addr, user_ip4) + 2),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[2], 14),
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/* 4th_byte_of_user_ip4 == expected && */
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BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,
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offsetof(struct bpf_sock_addr, user_ip4) + 3),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[3], 12),
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/* 1st_half_of_user_ip4 == expected && */
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BPF_LDX_MEM(BPF_H, BPF_REG_7, BPF_REG_6,
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offsetof(struct bpf_sock_addr, user_ip4)),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr16[0], 8),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr16[0], 10),
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/* 2nd_half_of_user_ip4 == expected && */
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BPF_LDX_MEM(BPF_H, BPF_REG_7, BPF_REG_6,
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offsetof(struct bpf_sock_addr, user_ip4) + 2),
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BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr16[1], 8),
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/* whole_user_ip4 == expected) { */
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BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
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