netdev - [PATCH bpf v4 08/14] bpf/tests: Add test case flag for verifier zero-extension

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Message-Id: <20210914091842.4186267-9-johan.almbladh@anyfinetworks.com>
Date:   Tue, 14 Sep 2021 11:18:36 +0200
From:   Johan Almbladh <johan.almbladh@...finetworks.com>
To:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org
Cc:     kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org, iii@...ux.ibm.com,
        paul@...ium.io, yangtiezhu@...ngson.cn, netdev@...r.kernel.org,
        bpf@...r.kernel.org,
        Johan Almbladh <johan.almbladh@...finetworks.com>
Subject: [PATCH bpf v4 08/14] bpf/tests: Add test case flag for verifier zero-extension

This patch adds a new flag to indicate that the verified did insert
zero-extensions, even though the verifier is not being run for any
of the tests.

Signed-off-by: Johan Almbladh <johan.almbladh@...finetworks.com>
---
 lib/test_bpf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index 6a04447171c7..26f7c244c78a 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -52,6 +52,7 @@
 #define FLAG_NO_DATA		BIT(0)
 #define FLAG_EXPECTED_FAIL	BIT(1)
 #define FLAG_SKB_FRAG		BIT(2)
+#define FLAG_VERIFIER_ZEXT	BIT(3)
 
 enum {
 	CLASSIC  = BIT(6),	/* Old BPF instructions only. */
@@ -11280,6 +11281,8 @@ static struct bpf_prog *generate_filter(int which, int *err)
 		fp->type = BPF_PROG_TYPE_SOCKET_FILTER;
 		memcpy(fp->insnsi, fptr, fp->len * sizeof(struct bpf_insn));
 		fp->aux->stack_depth = tests[which].stack_depth;
+		fp->aux->verifier_zext = !!(tests[which].aux &
+					    FLAG_VERIFIER_ZEXT);
 
 		/* We cannot error here as we don't need type compatibility
 		 * checks.
-- 
2.30.2