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Commit e7605475 authored by Andrey Ignatov's avatar Andrey Ignatov Committed by Alexei Starovoitov
Browse files

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: default avatarAndrey Ignatov <rdna@fb.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 6c2afb67

tools/testing/selftests/bpf/test_sock_addr.c

+24 −4
Original line number Diff line number Diff line
@@ -574,24 +574,44 @@ static int bind4_prog_load(const struct sock_addr_test *test) 
		/* if (sk.family == AF_INET && */

		BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,

			    offsetof(struct bpf_sock_addr, family)),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, AF_INET, 16),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, AF_INET, 24),



		/*     (sk.type == SOCK_DGRAM || sk.type == SOCK_STREAM) && */

		BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,

			    offsetof(struct bpf_sock_addr, type)),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, SOCK_DGRAM, 1),

		BPF_JMP_A(1),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, SOCK_STREAM, 12),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, SOCK_STREAM, 20),



		/*     1st_byte_of_user_ip4 == expected && */

		BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,

			    offsetof(struct bpf_sock_addr, user_ip4)),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[0], 10),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[0], 18),



		/*     2nd_byte_of_user_ip4 == expected && */

		BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,

			    offsetof(struct bpf_sock_addr, user_ip4) + 1),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[1], 16),



		/*     3rd_byte_of_user_ip4 == expected && */

		BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,

			    offsetof(struct bpf_sock_addr, user_ip4) + 2),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[2], 14),



		/*     4th_byte_of_user_ip4 == expected && */

		BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,

			    offsetof(struct bpf_sock_addr, user_ip4) + 3),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[3], 12),



		/*     1st_half_of_user_ip4 == expected && */

		BPF_LDX_MEM(BPF_H, BPF_REG_7, BPF_REG_6,

			    offsetof(struct bpf_sock_addr, user_ip4)),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr16[0], 8),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr16[0], 10),



		/*     2nd_half_of_user_ip4 == expected && */

		BPF_LDX_MEM(BPF_H, BPF_REG_7, BPF_REG_6,

			    offsetof(struct bpf_sock_addr, user_ip4) + 2),

		BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr16[1], 8),



		/*     whole_user_ip4 == expected) { */

		BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,