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https://git.proxmox.com/git/mirror_zfs.git
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f1ca4da6f7
in an initial reasonable autoconf style build system. This does not yet build but the configure system does appear to work properly and integrate with the kernel. Hopefully the next commit gets us back to a buildable version we can run the test suite against. git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@1 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
#include <sys/zfs_context.h>
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#include <sys/splat-ctl.h>
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#define KZT_SUBSYSTEM_KRNG 0x0300
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#define KZT_KRNG_NAME "krng"
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#define KZT_KRNG_DESC "Kernel Random Number Generator Tests"
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#define KZT_KRNG_TEST1_ID 0x0301
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#define KZT_KRNG_TEST1_NAME "freq"
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#define KZT_KRNG_TEST1_DESC "Frequency Test"
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#define KRNG_NUM_BITS 1048576
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#define KRNG_NUM_BYTES (KRNG_NUM_BITS >> 3)
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#define KRNG_NUM_BITS_DIV2 (KRNG_NUM_BITS >> 1)
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#define KRNG_ERROR_RANGE 2097
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/* Random Number Generator Tests
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There can be meny more tests on quality of the
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random number generator. For now we are only
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testing the frequency of particular bits.
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We could also test consecutive sequences,
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randomness within a particular block, etc.
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but is probably not necessary for our purposes */
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static int
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kzt_krng_test1(struct file *file, void *arg)
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{
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uint8_t *buf;
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int i, j, diff, num = 0, rc = 0;
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buf = kmalloc(sizeof(*buf) * KRNG_NUM_BYTES, GFP_KERNEL);
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if (buf == NULL) {
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rc = -ENOMEM;
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goto out;
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}
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memset(buf, 0, sizeof(*buf) * KRNG_NUM_BYTES);
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/* Always succeeds */
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random_get_pseudo_bytes(buf, sizeof(uint8_t) * KRNG_NUM_BYTES);
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for (i = 0; i < KRNG_NUM_BYTES; i++) {
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uint8_t tmp = buf[i];
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for (j = 0; j < 8; j++) {
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uint8_t tmp2 = ((tmp >> j) & 0x01);
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if (tmp2 == 1) {
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num++;
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}
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}
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}
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kfree(buf);
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diff = KRNG_NUM_BITS_DIV2 - num;
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if (diff < 0)
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diff *= -1;
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kzt_print(file, "Test 1 Number of ones: %d\n", num);
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kzt_print(file, "Test 1 Difference from expected: %d Allowed: %d\n",
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diff, KRNG_ERROR_RANGE);
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if (diff > KRNG_ERROR_RANGE)
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rc = -ERANGE;
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out:
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return rc;
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}
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kzt_subsystem_t *
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kzt_krng_init(void)
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{
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kzt_subsystem_t *sub;
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sub = kmalloc(sizeof(*sub), GFP_KERNEL);
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if (sub == NULL)
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return NULL;
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memset(sub, 0, sizeof(*sub));
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strncpy(sub->desc.name, KZT_KRNG_NAME, KZT_NAME_SIZE);
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strncpy(sub->desc.desc, KZT_KRNG_DESC, KZT_DESC_SIZE);
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INIT_LIST_HEAD(&sub->subsystem_list);
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INIT_LIST_HEAD(&sub->test_list);
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spin_lock_init(&sub->test_lock);
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sub->desc.id = KZT_SUBSYSTEM_KRNG;
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KZT_TEST_INIT(sub, KZT_KRNG_TEST1_NAME, KZT_KRNG_TEST1_DESC,
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KZT_KRNG_TEST1_ID, kzt_krng_test1);
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return sub;
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}
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void
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kzt_krng_fini(kzt_subsystem_t *sub)
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{
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ASSERT(sub);
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KZT_TEST_FINI(sub, KZT_KRNG_TEST1_ID);
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kfree(sub);
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}
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int
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kzt_krng_id(void) {
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return KZT_SUBSYSTEM_KRNG;
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}
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