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seq_buf: Export seq_buf_putmem_hex() and add KUnit tests

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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.

Export seq_buf_putmem_hex() as well so SEQ_BUF_KUNIT_TEST=m links
cleanly. Without the export, modpost reports seq_buf_putmem_hex as
undefined when seq_buf_kunit is built as a module.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: David Gow <david@davidgow.net>
Link: https://patch.msgid.link/20260408202351.21829-1-shuvampandey1@gmail.com
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Shuvam Pandey <shuvampandey1@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Shuvam Pandey 2026-04-09 02:08:51 +05:45 committed by Steven Rostedt
parent 3839a8eedd
commit ae3197ee07
2 changed files with 35 additions and 0 deletions
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1
lib/seq_buf.c
View File

@ -298,6 +298,7 @@ int seq_buf_putmem_hex(struct seq_buf *s, const void *mem,
}
return 0;
}
EXPORT_SYMBOL_GPL(seq_buf_putmem_hex);
/**
* seq_buf_path - copy a path into the sequence buffer

34
lib/tests/seq_buf_kunit.c
View File

@ -184,6 +184,38 @@ static void seq_buf_get_buf_commit_test(struct kunit *test)
KUNIT_EXPECT_TRUE(test, seq_buf_has_overflowed(&s));
}
static void seq_buf_putmem_hex_test(struct kunit *test)
{
DECLARE_SEQ_BUF(s, 24);
const u8 data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
#ifdef __BIG_ENDIAN
const char *expected = "0001020304050607 0809 ";
#else
const char *expected = "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[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
#ifdef __BIG_ENDIAN
const char *expected = "0001020304050607 ";
#else
const char *expected = "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[] = {
KUNIT_CASE(seq_buf_init_test),
KUNIT_CASE(seq_buf_declare_test),
@ -194,6 +226,8 @@ static struct kunit_case seq_buf_test_cases[] = {
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),
{}
};