lib/test-string_helpers: add test cases for new features

We have got new flags and hence new features of string_escape_mem().
Add test cases for that.

Link: https://lkml.kernel.org/r/20210504180819.73127-10-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 133 insertions, 8 deletions

diff --git a/lib/test-string_helpers.c b/lib/test-string_helpers.c
index 3e2def9ccfac..2185d71704f0 100644
--- a/lib/test-string_helpers.c
+++ b/lib/test-string_helpers.c
@@ -203,10 +203,24 @@ static const struct test_string_2 escape0[] __initconst = {{
 		/* terminator */
 	}}
 },{
+	.in = "\007 \eb\"\x90\xCF\r",
+	.s1 = {{
+		.out = "\007 \eb\"\\220\\317\r",
+		.flags = ESCAPE_OCTAL | ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\\x90\\xcf\r",
+		.flags = ESCAPE_HEX | ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\x90\xCF\r",
+		.flags = ESCAPE_NA,
+	},{
+		/* terminator */
+	}}
+},{
 	/* terminator */
 }};
 
-#define	TEST_STRING_2_DICT_1		"b\\ \t\r"
+#define	TEST_STRING_2_DICT_1		"b\\ \t\r\xCF"
 static const struct test_string_2 escape1[] __initconst = {{
 	.in = "\f\\ \n\r\t\v",
 	.s1 = {{
@@ -216,14 +230,38 @@ static const struct test_string_2 escape1[] __initconst = {{
 		.out = "\f\\x5c\\x20\n\\x0d\\x09\v",
 		.flags = ESCAPE_HEX,
 	},{
+		.out = "\f\\134\\040\n\\015\\011\v",
+		.flags = ESCAPE_ANY | ESCAPE_APPEND,
+	},{
+		.out = "\\014\\134\\040\\012\\015\\011\\013",
+		.flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NAP,
+	},{
+		.out = "\\x0c\\x5c\\x20\\x0a\\x0d\\x09\\x0b",
+		.flags = ESCAPE_HEX | ESCAPE_APPEND | ESCAPE_NAP,
+	},{
+		.out = "\f\\134\\040\n\\015\\011\v",
+		.flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NA,
+	},{
+		.out = "\f\\x5c\\x20\n\\x0d\\x09\v",
+		.flags = ESCAPE_HEX | ESCAPE_APPEND | ESCAPE_NA,
+	},{
 		/* terminator */
 	}}
 },{
-	.in = "\\h\\\"\a\e\\",
+	.in = "\\h\\\"\a\xCF\e\\",
 	.s1 = {{
-		.out = "\\134h\\134\"\a\e\\134",
+		.out = "\\134h\\134\"\a\\317\e\\134",
 		.flags = ESCAPE_OCTAL,
 	},{
+		.out = "\\134h\\134\"\a\\317\e\\134",
+		.flags = ESCAPE_ANY | ESCAPE_APPEND,
+	},{
+		.out = "\\134h\\134\"\\007\\317\\033\\134",
+		.flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NAP,
+	},{
+		.out = "\\134h\\134\"\a\\317\e\\134",
+		.flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NA,
+	},{
 		/* terminator */
 	}}
 },{
@@ -235,6 +273,88 @@ static const struct test_string_2 escape1[] __initconst = {{
 		/* terminator */
 	}}
 },{
+	.in = "\007 \eb\"\x90\xCF\r",
+	.s1 = {{
+		.out = "\007 \eb\"\x90\xCF\r",
+		.flags = ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\x90\xCF\r",
+		.flags = ESCAPE_SPACE | ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\x90\xCF\r",
+		.flags = ESCAPE_SPECIAL | ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\x90\xCF\r",
+		.flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\x90\\317\r",
+		.flags = ESCAPE_OCTAL | ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\x90\\317\r",
+		.flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\x90\\317\r",
+		.flags = ESCAPE_SPECIAL | ESCAPE_OCTAL | ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\x90\\317\r",
+		.flags = ESCAPE_ANY | ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\x90\\xcf\r",
+		.flags = ESCAPE_HEX | ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\x90\\xcf\r",
+		.flags = ESCAPE_SPACE | ESCAPE_HEX | ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\x90\\xcf\r",
+		.flags = ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NA,
+	},{
+		.out = "\007 \eb\"\x90\\xcf\r",
+		.flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NA,
+	},{
+		/* terminator */
+	}}
+},{
+	.in = "\007 \eb\"\x90\xCF\r",
+	.s1 = {{
+		.out = "\007 \eb\"\x90\xCF\r",
+		.flags = ESCAPE_NAP,
+	},{
+		.out = "\007 \eb\"\x90\xCF\\r",
+		.flags = ESCAPE_SPACE | ESCAPE_NAP,
+	},{
+		.out = "\007 \eb\"\x90\xCF\r",
+		.flags = ESCAPE_SPECIAL | ESCAPE_NAP,
+	},{
+		.out = "\007 \eb\"\x90\xCF\\r",
+		.flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NAP,
+	},{
+		.out = "\007 \eb\"\x90\\317\\015",
+		.flags = ESCAPE_OCTAL | ESCAPE_NAP,
+	},{
+		.out = "\007 \eb\"\x90\\317\\r",
+		.flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NAP,
+	},{
+		.out = "\007 \eb\"\x90\\317\\015",
+		.flags = ESCAPE_SPECIAL | ESCAPE_OCTAL | ESCAPE_NAP,
+	},{
+		.out = "\007 \eb\"\x90\\317\r",
+		.flags = ESCAPE_ANY | ESCAPE_NAP,
+	},{
+		.out = "\007 \eb\"\x90\\xcf\\x0d",
+		.flags = ESCAPE_HEX | ESCAPE_NAP,
+	},{
+		.out = "\007 \eb\"\x90\\xcf\\r",
+		.flags = ESCAPE_SPACE | ESCAPE_HEX | ESCAPE_NAP,
+	},{
+		.out = "\007 \eb\"\x90\\xcf\\x0d",
+		.flags = ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NAP,
+	},{
+		.out = "\007 \eb\"\x90\\xcf\\r",
+		.flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NAP,
+	},{
+		/* terminator */
+	}}
+},{
 	/* terminator */
 }};
 
@@ -315,8 +435,13 @@ static __init void test_string_escape(const char *name,
 		/* NULL injection */
 		if (flags & ESCAPE_NULL) {
 			in[p++] = '\0';
-			out_test[q_test++] = '\\';
-			out_test[q_test++] = '0';
+			/* '\0' passes isascii() test */
+			if (flags & ESCAPE_NA && !(flags & ESCAPE_APPEND && esc)) {
+				out_test[q_test++] = '\0';
+			} else {
+				out_test[q_test++] = '\\';
+				out_test[q_test++] = '0';
+			}
 		}
 
 		/* Don't try strings that have no output */
@@ -459,17 +584,17 @@ static int __init test_string_helpers_init(void)
 	unsigned int i;
 
 	pr_info("Running tests...\n");
-	for (i = 0; i < UNESCAPE_ANY + 1; i++)
+	for (i = 0; i < UNESCAPE_ALL_MASK + 1; i++)
 		test_string_unescape("unescape", i, false);
 	test_string_unescape("unescape inplace",
 			     get_random_int() % (UNESCAPE_ANY + 1), true);
 
 	/* Without dictionary */
-	for (i = 0; i < (ESCAPE_ANY_NP | ESCAPE_HEX) + 1; i++)
+	for (i = 0; i < ESCAPE_ALL_MASK + 1; i++)
 		test_string_escape("escape 0", escape0, i, TEST_STRING_2_DICT_0);
 
 	/* With dictionary */
-	for (i = 0; i < (ESCAPE_ANY_NP | ESCAPE_HEX) + 1; i++)
+	for (i = 0; i < ESCAPE_ALL_MASK + 1; i++)
 		test_string_escape("escape 1", escape1, i, TEST_STRING_2_DICT_1);
 
 	/* Test string_get_size() */