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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>
This commit is contained in:
Andy Shevchenko 2021-06-30 18:55:29 -07:00 committed by Linus Torvalds
parent 69325698df
commit 259fa5d7d8
2 changed files with 137 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/string_helpers.h
View File

@ -26,6 +26,8 @@ void string_get_size(u64 size, u64 blk_size, enum string_size_units units,
#define UNESCAPE_ANY \
(UNESCAPE_SPACE | UNESCAPE_OCTAL | UNESCAPE_HEX | UNESCAPE_SPECIAL)
#define UNESCAPE_ALL_MASK GENMASK(3, 0)
int string_unescape(char *src, char *dst, size_t size, unsigned int flags);
static inline int string_unescape_inplace(char *buf, unsigned int flags)
@ -56,6 +58,8 @@ static inline int string_unescape_any_inplace(char *buf)
#define ESCAPE_NAP BIT(7)
#define ESCAPE_APPEND BIT(8)
#define ESCAPE_ALL_MASK GENMASK(8, 0)
int string_escape_mem(const char *src, size_t isz, char *dst, size_t osz,
unsigned int flags, const char *only);

141
lib/test-string_helpers.c
View File

@ -202,11 +202,25 @@ 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 = {{
@ -215,14 +229,38 @@ 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 */
}}
@ -234,6 +272,88 @@ 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() */