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Sun, 05 Apr 2026 20:37:37 -0700 (PDT) Received: from localhost.localdomain ([110.44.115.179]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82d12218738sm9539766b3a.21.2026.04.05.20.37.34 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Sun, 05 Apr 2026 20:37:37 -0700 (PDT) From: Shuvam Pandey To: Andrew Morton , Steven Rostedt Cc: Masami Hiramatsu , Mathieu Desnoyers , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Shuvam Pandey Subject: [PATCH] seq_buf: add KUnit tests for seq_buf_putmem_hex() Date: Mon, 6 Apr 2026 09:22:28 +0545 Message-ID: <20260406033728.25998-1-shuvampandey1@gmail.com> X-Mailer: git-send-email 2.50.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The seq_buf KUnit suite does not exercise seq_buf_putmem_hex(). Add one test for the len > 8 chunking path and one overflow test where a later chunk no longer fits in the buffer. Signed-off-by: Shuvam Pandey --- lib/tests/seq_buf_kunit.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/lib/tests/seq_buf_kunit.c b/lib/tests/seq_buf_kunit.c index 8a01579a9..eb466386b 100644 --- a/lib/tests/seq_buf_kunit.c +++ b/lib/tests/seq_buf_kunit.c @@ -184,6 +184,38 @@ static void seq_buf_get_buf_commit_test(struct kunit *= test) KUNIT_EXPECT_TRUE(test, seq_buf_has_overflowed(&s)); } =20 +static void seq_buf_putmem_hex_test(struct kunit *test) +{ + DECLARE_SEQ_BUF(s, 24); + const u8 data[] =3D { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; +#ifdef __BIG_ENDIAN + const char *expected =3D "0001020304050607 0809 "; +#else + const char *expected =3D "0706050403020100 0908 "; +#endif + + KUNIT_EXPECT_EQ(test, seq_buf_putmem_hex(&s, data, sizeof(data)), 0); + KUNIT_EXPECT_FALSE(test, seq_buf_has_overflowed(&s)); + KUNIT_EXPECT_EQ(test, seq_buf_used(&s), strlen(expected)); + KUNIT_EXPECT_STREQ(test, seq_buf_str(&s), expected); +} + +static void seq_buf_putmem_hex_overflow_test(struct kunit *test) +{ + DECLARE_SEQ_BUF(s, 20); + const u8 data[] =3D { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; +#ifdef __BIG_ENDIAN + const char *expected =3D "0001020304050607 "; +#else + const char *expected =3D "0706050403020100 "; +#endif + + KUNIT_EXPECT_EQ(test, seq_buf_putmem_hex(&s, data, sizeof(data)), -1); + KUNIT_EXPECT_TRUE(test, seq_buf_has_overflowed(&s)); + KUNIT_EXPECT_EQ(test, seq_buf_used(&s), 20); + KUNIT_EXPECT_STREQ(test, seq_buf_str(&s), expected); +} + static struct kunit_case seq_buf_test_cases[] =3D { KUNIT_CASE(seq_buf_init_test), KUNIT_CASE(seq_buf_declare_test), @@ -194,6 +226,8 @@ static struct kunit_case seq_buf_test_cases[] =3D { KUNIT_CASE(seq_buf_printf_test), KUNIT_CASE(seq_buf_printf_overflow_test), KUNIT_CASE(seq_buf_get_buf_commit_test), + KUNIT_CASE(seq_buf_putmem_hex_test), + KUNIT_CASE(seq_buf_putmem_hex_overflow_test), {} }; =20 --=20 2.50.0