mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 18:14:07 +08:00
72676bb53f
Recently added commit564b026fbd
("string_helpers: fix precision loss for some inputs") fixed precision issues for string_get_size() and broke tests. Fix and improve them: test both STRING_UNITS_2 and STRING_UNITS_10 at a time, better failure reporting, test small an huge values. Fixes:564b026fbd
("string_helpers: fix precision loss for some inputs") Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: James Bottomley <JBottomley@Odin.com> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
418 lines
10 KiB
C
418 lines
10 KiB
C
/*
|
|
* Test cases for lib/string_helpers.c module.
|
|
*/
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
#include <linux/random.h>
|
|
#include <linux/string.h>
|
|
#include <linux/string_helpers.h>
|
|
|
|
static __init bool test_string_check_buf(const char *name, unsigned int flags,
|
|
char *in, size_t p,
|
|
char *out_real, size_t q_real,
|
|
char *out_test, size_t q_test)
|
|
{
|
|
if (q_real == q_test && !memcmp(out_test, out_real, q_test))
|
|
return true;
|
|
|
|
pr_warn("Test '%s' failed: flags = %u\n", name, flags);
|
|
|
|
print_hex_dump(KERN_WARNING, "Input: ", DUMP_PREFIX_NONE, 16, 1,
|
|
in, p, true);
|
|
print_hex_dump(KERN_WARNING, "Expected: ", DUMP_PREFIX_NONE, 16, 1,
|
|
out_test, q_test, true);
|
|
print_hex_dump(KERN_WARNING, "Got: ", DUMP_PREFIX_NONE, 16, 1,
|
|
out_real, q_real, true);
|
|
|
|
return false;
|
|
}
|
|
|
|
struct test_string {
|
|
const char *in;
|
|
const char *out;
|
|
unsigned int flags;
|
|
};
|
|
|
|
static const struct test_string strings[] __initconst = {
|
|
{
|
|
.in = "\\f\\ \\n\\r\\t\\v",
|
|
.out = "\f\\ \n\r\t\v",
|
|
.flags = UNESCAPE_SPACE,
|
|
},
|
|
{
|
|
.in = "\\40\\1\\387\\0064\\05\\040\\8a\\110\\777",
|
|
.out = " \001\00387\0064\005 \\8aH?7",
|
|
.flags = UNESCAPE_OCTAL,
|
|
},
|
|
{
|
|
.in = "\\xv\\xa\\x2c\\xD\\x6f2",
|
|
.out = "\\xv\n,\ro2",
|
|
.flags = UNESCAPE_HEX,
|
|
},
|
|
{
|
|
.in = "\\h\\\\\\\"\\a\\e\\",
|
|
.out = "\\h\\\"\a\e\\",
|
|
.flags = UNESCAPE_SPECIAL,
|
|
},
|
|
};
|
|
|
|
static void __init test_string_unescape(const char *name, unsigned int flags,
|
|
bool inplace)
|
|
{
|
|
int q_real = 256;
|
|
char *in = kmalloc(q_real, GFP_KERNEL);
|
|
char *out_test = kmalloc(q_real, GFP_KERNEL);
|
|
char *out_real = kmalloc(q_real, GFP_KERNEL);
|
|
int i, p = 0, q_test = 0;
|
|
|
|
if (!in || !out_test || !out_real)
|
|
goto out;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(strings); i++) {
|
|
const char *s = strings[i].in;
|
|
int len = strlen(strings[i].in);
|
|
|
|
/* Copy string to in buffer */
|
|
memcpy(&in[p], s, len);
|
|
p += len;
|
|
|
|
/* Copy expected result for given flags */
|
|
if (flags & strings[i].flags) {
|
|
s = strings[i].out;
|
|
len = strlen(strings[i].out);
|
|
}
|
|
memcpy(&out_test[q_test], s, len);
|
|
q_test += len;
|
|
}
|
|
in[p++] = '\0';
|
|
|
|
/* Call string_unescape and compare result */
|
|
if (inplace) {
|
|
memcpy(out_real, in, p);
|
|
if (flags == UNESCAPE_ANY)
|
|
q_real = string_unescape_any_inplace(out_real);
|
|
else
|
|
q_real = string_unescape_inplace(out_real, flags);
|
|
} else if (flags == UNESCAPE_ANY) {
|
|
q_real = string_unescape_any(in, out_real, q_real);
|
|
} else {
|
|
q_real = string_unescape(in, out_real, q_real, flags);
|
|
}
|
|
|
|
test_string_check_buf(name, flags, in, p - 1, out_real, q_real,
|
|
out_test, q_test);
|
|
out:
|
|
kfree(out_real);
|
|
kfree(out_test);
|
|
kfree(in);
|
|
}
|
|
|
|
struct test_string_1 {
|
|
const char *out;
|
|
unsigned int flags;
|
|
};
|
|
|
|
#define TEST_STRING_2_MAX_S1 32
|
|
struct test_string_2 {
|
|
const char *in;
|
|
struct test_string_1 s1[TEST_STRING_2_MAX_S1];
|
|
};
|
|
|
|
#define TEST_STRING_2_DICT_0 NULL
|
|
static const struct test_string_2 escape0[] __initconst = {{
|
|
.in = "\f\\ \n\r\t\v",
|
|
.s1 = {{
|
|
.out = "\\f\\ \\n\\r\\t\\v",
|
|
.flags = ESCAPE_SPACE,
|
|
},{
|
|
.out = "\\f\\134\\040\\n\\r\\t\\v",
|
|
.flags = ESCAPE_SPACE | ESCAPE_OCTAL,
|
|
},{
|
|
.out = "\\f\\x5c\\x20\\n\\r\\t\\v",
|
|
.flags = ESCAPE_SPACE | ESCAPE_HEX,
|
|
},{
|
|
/* terminator */
|
|
}},
|
|
},{
|
|
.in = "\\h\\\"\a\e\\",
|
|
.s1 = {{
|
|
.out = "\\\\h\\\\\"\\a\\e\\\\",
|
|
.flags = ESCAPE_SPECIAL,
|
|
},{
|
|
.out = "\\\\\\150\\\\\\042\\a\\e\\\\",
|
|
.flags = ESCAPE_SPECIAL | ESCAPE_OCTAL,
|
|
},{
|
|
.out = "\\\\\\x68\\\\\\x22\\a\\e\\\\",
|
|
.flags = ESCAPE_SPECIAL | ESCAPE_HEX,
|
|
},{
|
|
/* terminator */
|
|
}},
|
|
},{
|
|
.in = "\eb \\C\007\"\x90\r]",
|
|
.s1 = {{
|
|
.out = "\eb \\C\007\"\x90\\r]",
|
|
.flags = ESCAPE_SPACE,
|
|
},{
|
|
.out = "\\eb \\\\C\\a\"\x90\r]",
|
|
.flags = ESCAPE_SPECIAL,
|
|
},{
|
|
.out = "\\eb \\\\C\\a\"\x90\\r]",
|
|
.flags = ESCAPE_SPACE | ESCAPE_SPECIAL,
|
|
},{
|
|
.out = "\\033\\142\\040\\134\\103\\007\\042\\220\\015\\135",
|
|
.flags = ESCAPE_OCTAL,
|
|
},{
|
|
.out = "\\033\\142\\040\\134\\103\\007\\042\\220\\r\\135",
|
|
.flags = ESCAPE_SPACE | ESCAPE_OCTAL,
|
|
},{
|
|
.out = "\\e\\142\\040\\\\\\103\\a\\042\\220\\015\\135",
|
|
.flags = ESCAPE_SPECIAL | ESCAPE_OCTAL,
|
|
},{
|
|
.out = "\\e\\142\\040\\\\\\103\\a\\042\\220\\r\\135",
|
|
.flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_OCTAL,
|
|
},{
|
|
.out = "\eb \\C\007\"\x90\r]",
|
|
.flags = ESCAPE_NP,
|
|
},{
|
|
.out = "\eb \\C\007\"\x90\\r]",
|
|
.flags = ESCAPE_SPACE | ESCAPE_NP,
|
|
},{
|
|
.out = "\\eb \\C\\a\"\x90\r]",
|
|
.flags = ESCAPE_SPECIAL | ESCAPE_NP,
|
|
},{
|
|
.out = "\\eb \\C\\a\"\x90\\r]",
|
|
.flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NP,
|
|
},{
|
|
.out = "\\033b \\C\\007\"\\220\\015]",
|
|
.flags = ESCAPE_OCTAL | ESCAPE_NP,
|
|
},{
|
|
.out = "\\033b \\C\\007\"\\220\\r]",
|
|
.flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NP,
|
|
},{
|
|
.out = "\\eb \\C\\a\"\\220\\r]",
|
|
.flags = ESCAPE_SPECIAL | ESCAPE_SPACE | ESCAPE_OCTAL |
|
|
ESCAPE_NP,
|
|
},{
|
|
.out = "\\x1bb \\C\\x07\"\\x90\\x0d]",
|
|
.flags = ESCAPE_NP | ESCAPE_HEX,
|
|
},{
|
|
/* terminator */
|
|
}},
|
|
},{
|
|
/* terminator */
|
|
}};
|
|
|
|
#define TEST_STRING_2_DICT_1 "b\\ \t\r"
|
|
static const struct test_string_2 escape1[] __initconst = {{
|
|
.in = "\f\\ \n\r\t\v",
|
|
.s1 = {{
|
|
.out = "\f\\134\\040\n\\015\\011\v",
|
|
.flags = ESCAPE_OCTAL,
|
|
},{
|
|
.out = "\f\\x5c\\x20\n\\x0d\\x09\v",
|
|
.flags = ESCAPE_HEX,
|
|
},{
|
|
/* terminator */
|
|
}},
|
|
},{
|
|
.in = "\\h\\\"\a\e\\",
|
|
.s1 = {{
|
|
.out = "\\134h\\134\"\a\e\\134",
|
|
.flags = ESCAPE_OCTAL,
|
|
},{
|
|
/* terminator */
|
|
}},
|
|
},{
|
|
.in = "\eb \\C\007\"\x90\r]",
|
|
.s1 = {{
|
|
.out = "\e\\142\\040\\134C\007\"\x90\\015]",
|
|
.flags = ESCAPE_OCTAL,
|
|
},{
|
|
/* terminator */
|
|
}},
|
|
},{
|
|
/* terminator */
|
|
}};
|
|
|
|
static __init const char *test_string_find_match(const struct test_string_2 *s2,
|
|
unsigned int flags)
|
|
{
|
|
const struct test_string_1 *s1 = s2->s1;
|
|
unsigned int i;
|
|
|
|
if (!flags)
|
|
return s2->in;
|
|
|
|
/* Test cases are NULL-aware */
|
|
flags &= ~ESCAPE_NULL;
|
|
|
|
/* ESCAPE_OCTAL has a higher priority */
|
|
if (flags & ESCAPE_OCTAL)
|
|
flags &= ~ESCAPE_HEX;
|
|
|
|
for (i = 0; i < TEST_STRING_2_MAX_S1 && s1->out; i++, s1++)
|
|
if (s1->flags == flags)
|
|
return s1->out;
|
|
return NULL;
|
|
}
|
|
|
|
static __init void
|
|
test_string_escape_overflow(const char *in, int p, unsigned int flags, const char *esc,
|
|
int q_test, const char *name)
|
|
{
|
|
int q_real;
|
|
|
|
q_real = string_escape_mem(in, p, NULL, 0, flags, esc);
|
|
if (q_real != q_test)
|
|
pr_warn("Test '%s' failed: flags = %u, osz = 0, expected %d, got %d\n",
|
|
name, flags, q_test, q_real);
|
|
}
|
|
|
|
static __init void test_string_escape(const char *name,
|
|
const struct test_string_2 *s2,
|
|
unsigned int flags, const char *esc)
|
|
{
|
|
size_t out_size = 512;
|
|
char *out_test = kmalloc(out_size, GFP_KERNEL);
|
|
char *out_real = kmalloc(out_size, GFP_KERNEL);
|
|
char *in = kmalloc(256, GFP_KERNEL);
|
|
int p = 0, q_test = 0;
|
|
int q_real;
|
|
|
|
if (!out_test || !out_real || !in)
|
|
goto out;
|
|
|
|
for (; s2->in; s2++) {
|
|
const char *out;
|
|
int len;
|
|
|
|
/* NULL injection */
|
|
if (flags & ESCAPE_NULL) {
|
|
in[p++] = '\0';
|
|
out_test[q_test++] = '\\';
|
|
out_test[q_test++] = '0';
|
|
}
|
|
|
|
/* Don't try strings that have no output */
|
|
out = test_string_find_match(s2, flags);
|
|
if (!out)
|
|
continue;
|
|
|
|
/* Copy string to in buffer */
|
|
len = strlen(s2->in);
|
|
memcpy(&in[p], s2->in, len);
|
|
p += len;
|
|
|
|
/* Copy expected result for given flags */
|
|
len = strlen(out);
|
|
memcpy(&out_test[q_test], out, len);
|
|
q_test += len;
|
|
}
|
|
|
|
q_real = string_escape_mem(in, p, out_real, out_size, flags, esc);
|
|
|
|
test_string_check_buf(name, flags, in, p, out_real, q_real, out_test,
|
|
q_test);
|
|
|
|
test_string_escape_overflow(in, p, flags, esc, q_test, name);
|
|
|
|
out:
|
|
kfree(in);
|
|
kfree(out_real);
|
|
kfree(out_test);
|
|
}
|
|
|
|
#define string_get_size_maxbuf 16
|
|
#define test_string_get_size_one(size, blk_size, exp_result10, exp_result2) \
|
|
do { \
|
|
BUILD_BUG_ON(sizeof(exp_result10) >= string_get_size_maxbuf); \
|
|
BUILD_BUG_ON(sizeof(exp_result2) >= string_get_size_maxbuf); \
|
|
__test_string_get_size((size), (blk_size), (exp_result10), \
|
|
(exp_result2)); \
|
|
} while (0)
|
|
|
|
|
|
static __init void test_string_get_size_check(const char *units,
|
|
const char *exp,
|
|
char *res,
|
|
const u64 size,
|
|
const u64 blk_size)
|
|
{
|
|
if (!memcmp(res, exp, strlen(exp) + 1))
|
|
return;
|
|
|
|
res[string_get_size_maxbuf - 1] = '\0';
|
|
|
|
pr_warn("Test 'test_string_get_size' failed!\n");
|
|
pr_warn("string_get_size(size = %llu, blk_size = %llu, units = %s)\n",
|
|
size, blk_size, units);
|
|
pr_warn("expected: '%s', got '%s'\n", exp, res);
|
|
}
|
|
|
|
static __init void __test_string_get_size(const u64 size, const u64 blk_size,
|
|
const char *exp_result10,
|
|
const char *exp_result2)
|
|
{
|
|
char buf10[string_get_size_maxbuf];
|
|
char buf2[string_get_size_maxbuf];
|
|
|
|
string_get_size(size, blk_size, STRING_UNITS_10, buf10, sizeof(buf10));
|
|
string_get_size(size, blk_size, STRING_UNITS_2, buf2, sizeof(buf2));
|
|
|
|
test_string_get_size_check("STRING_UNITS_10", exp_result10, buf10,
|
|
size, blk_size);
|
|
|
|
test_string_get_size_check("STRING_UNITS_2", exp_result2, buf2,
|
|
size, blk_size);
|
|
}
|
|
|
|
static __init void test_string_get_size(void)
|
|
{
|
|
/* small values */
|
|
test_string_get_size_one(0, 512, "0 B", "0 B");
|
|
test_string_get_size_one(1, 512, "512 B", "512 B");
|
|
test_string_get_size_one(1100, 1, "1.10 kB", "1.07 KiB");
|
|
|
|
/* normal values */
|
|
test_string_get_size_one(16384, 512, "8.39 MB", "8.00 MiB");
|
|
test_string_get_size_one(500118192, 512, "256 GB", "238 GiB");
|
|
test_string_get_size_one(8192, 4096, "33.6 MB", "32.0 MiB");
|
|
|
|
/* weird block sizes */
|
|
test_string_get_size_one(3000, 1900, "5.70 MB", "5.44 MiB");
|
|
|
|
/* huge values */
|
|
test_string_get_size_one(U64_MAX, 4096, "75.6 ZB", "64.0 ZiB");
|
|
test_string_get_size_one(4096, U64_MAX, "75.6 ZB", "64.0 ZiB");
|
|
}
|
|
|
|
static int __init test_string_helpers_init(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
pr_info("Running tests...\n");
|
|
for (i = 0; i < UNESCAPE_ANY + 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++)
|
|
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++)
|
|
test_string_escape("escape 1", escape1, i, TEST_STRING_2_DICT_1);
|
|
|
|
/* Test string_get_size() */
|
|
test_string_get_size();
|
|
|
|
return -EINVAL;
|
|
}
|
|
module_init(test_string_helpers_init);
|
|
MODULE_LICENSE("Dual BSD/GPL");
|