+ test_hexdump-check-all-bytes-in-real-buffer.patch added to -mm tree

* + test_hexdump-check-all-bytes-in-real-buffer.patch added to -mm tree
@ 2015-12-10  0:31 akpm
  0 siblings, 0 replies; 2+ messages in thread
From: akpm @ 2015-12-10  0:31 UTC (permalink / raw)
  To: andriy.shevchenko, linux, mm-commits


The patch titled
     Subject: test_hexdump: check all bytes in real buffer
has been added to the -mm tree.  Its filename is
     test_hexdump-check-all-bytes-in-real-buffer.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/test_hexdump-check-all-bytes-in-real-buffer.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/test_hexdump-check-all-bytes-in-real-buffer.patch

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------------------------------------------------------
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: test_hexdump: check all bytes in real buffer

After processing by hex_dump_to_buffer() check all the parts to be expected.

Part 1. The actual expected hex dump with or without ASCII part.

Part 2. Check if the buffer is dirty beyond needed.

Part 3. Return code should be as expected.

This is done by using comparison of the return code and memcmp() against
the test buffer.  We fill the buffer by FILL_CHAR ('#') characters, so, we
expect to have a tail of the buffer will be left untouched.  The
terminating NUL is also checked by memcmp().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/test_hexdump.c |   36 ++++++++++++++++--------------------
 1 file changed, 16 insertions(+), 20 deletions(-)

diff -puN lib/test_hexdump.c~test_hexdump-check-all-bytes-in-real-buffer lib/test_hexdump.c

--- a/lib/test_hexdump.c~test_hexdump-check-all-bytes-in-real-buffer
+++ a/lib/test_hexdump.c
@@ -135,11 +135,10 @@ static void __init test_hexdump_set(int
 
 static void __init test_hexdump_overflow(size_t buflen, bool ascii)
 {
+	char test[TEST_HEXDUMP_BUF_SIZE];
 	char buf[TEST_HEXDUMP_BUF_SIZE];
-	const char *t = test_data_1_le[0];
-	size_t len = 1;
-	int rs = 16, gs = 1;
-	int ae, he, e, r;
+	int rs = rowsize, gs = groupsize;
+	int ae, he, e, f, r;
 	bool a;
 
 	memset(buf, FILL_CHAR, sizeof(buf));
@@ -157,26 +156,23 @@ static void __init test_hexdump_overflow
 		e = ae;
 	else
 		e = he;
-	buf[e + 2] = '\0';
 
-	if (!buflen) {
-		a = r == e && buf[0] == FILL_CHAR;
-	} else if (buflen < 3) {
-		a = r == e && buf[0] == '\0';
-	} else if (buflen < 4) {
-		a = r == e && !strcmp(buf, t);
-	} else if (ascii) {
-		if (buflen < 51)
-			a = r == e && buf[buflen - 1] == '\0' && buf[buflen - 2] == FILL_CHAR;
-		else
-			a = r == e && buf[50] == '\0' && buf[49] == '.';
-	} else {
-		a = r == e && buf[e] == '\0';
+	f = min_t(int, e + 1, buflen);
+	if (buflen) {
+		test_hexdump_prepare_test(len, rs, gs, test, sizeof(test), ascii);
+		test[f - 1] = '\0';
 	}
+	memset(test + f, FILL_CHAR, sizeof(test) - f);
+
+	a = r == e && !memcmp(test, buf, TEST_HEXDUMP_BUF_SIZE);
+
+	buf[sizeof(buf) - 1] = '\0';
 
 	if (!a) {
-		pr_err("Len: %zu rc: %u strlen: %zu\n", buflen, r, strlen(buf));
-		pr_err("Result: '%s'\n", buf);
+		pr_err("Len: %zu buflen: %zu strlen: %zu\n",
+			len, buflen, strnlen(buf, sizeof(buf)));
+		pr_err("Result: %d '%s'\n", r, buf);
+		pr_err("Expect: %d '%s'\n", e, test);
 	}
 }
 
_

Patches currently in -mm which might be from andriy.shevchenko@linux.intel.com are

test_hexdump-rename-to-test_hexdump.patch
test_hexdump-introduce-test_hexdump_prepare_test-helper.patch
test_hexdump-define-fill_char-constant.patch
test_hexdump-go-through-all-possible-lengths-of-buffer.patch
test_hexdump-replace-magic-numbers-by-their-meaning.patch
test_hexdump-switch-to-memcmp.patch
test_hexdump-check-all-bytes-in-real-buffer.patch
test_hexdump-test-all-possible-group-sizes-for-overflow.patch
test_hexdump-print-statistics-at-the-end.patch


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