1 // SPDX-License-Identifier: GPL-2.0
3 * Test cases for memcat_p() in lib/memcat_p.c
5 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7 #include <linux/string.h>
8 #include <linux/slab.h>
9 #include <linux/module.h>
16 #define MAGIC 0xf00ff00f
17 /* Size of each of the NULL-terminated input arrays */
19 /* Expected number of non-NULL elements in the output array */
20 #define EXPECT (INPUT_MAX * 2 - 2)
22 static int __init test_memcat_p_init(void)
24 struct test_struct **in0, **in1, **out, **p;
25 int err = -ENOMEM, i, r, total = 0;
27 in0 = kcalloc(INPUT_MAX, sizeof(*in0), GFP_KERNEL);
31 in1 = kcalloc(INPUT_MAX, sizeof(*in1), GFP_KERNEL);
35 for (i = 0, r = 1; i < INPUT_MAX - 1; i++) {
36 in0[i] = kmalloc(sizeof(**in0), GFP_KERNEL);
38 goto err_free_elements;
40 in1[i] = kmalloc(sizeof(**in1), GFP_KERNEL);
43 goto err_free_elements;
46 /* lifted from test_sort.c */
47 r = (r * 725861) % 6599;
50 in0[i]->magic = MAGIC;
51 in1[i]->magic = MAGIC;
54 in0[i] = in1[i] = NULL;
56 out = memcat_p(in0, in1);
58 goto err_free_all_elements;
61 for (i = 0, p = out; *p && (i < INPUT_MAX * 2 - 1); p++, i++) {
64 if ((*p)->magic != MAGIC) {
65 pr_err("test failed: wrong magic at %d: %u\n", i,
72 pr_err("test failed: expected zero total, got %d\n", total);
77 pr_err("test failed: expected output size %d, got %d\n",
82 for (i = 0; i < INPUT_MAX - 1; i++)
83 if (out[i] != in0[i] || out[i + INPUT_MAX - 1] != in1[i]) {
84 pr_err("test failed: wrong element order at %d\n", i);
89 pr_info("test passed\n");
93 err_free_all_elements:
96 for (i--; i >= 0; i--) {
108 static void __exit test_memcat_p_exit(void)
112 module_init(test_memcat_p_init);
113 module_exit(test_memcat_p_exit);
115 MODULE_LICENSE("GPL");