/* -*- linux-c -*- ------------------------------------------------------- * * * Copyright 2002-2007 H. Peter Anvin - All Rights Reserved * * This file is part of the Linux kernel, and is made available under * the terms of the GNU General Public License version 2 or (at your * option) any later version; incorporated herein by reference. * * ----------------------------------------------------------------------- *//* * raid6test.c * * Test RAID-6 recovery with various algorithms */#include <stdlib.h>#include <stdio.h>#include <string.h>#include <linux/raid/pq.h>#define NDISKS 16 /* Including P and Q */const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(256)));struct raid6_calls raid6_call;char *dataptrs[NDISKS];char data[NDISKS][PAGE_SIZE];char recovi[PAGE_SIZE], recovj[PAGE_SIZE];static void makedata(void){ int i, j; for (i = 0; i < NDISKS; i++) { for (j = 0; j < PAGE_SIZE; j++) data[i][j] = rand(); dataptrs[i] = data[i]; }}static char disk_type(int d){ switch (d) { case NDISKS-2: return 'P'; case NDISKS-1: return 'Q'; default: return 'D'; }}static int test_disks(int i, int j){ int erra, errb; memset(recovi, 0xf0, PAGE_SIZE); memset(recovj, 0xba, PAGE_SIZE); dataptrs[i] = recovi; dataptrs[j] = recovj; raid6_dual_recov(NDISKS, PAGE_SIZE, i, j, (void **)&dataptrs); erra = memcmp(data[i], recovi, PAGE_SIZE); errb = memcmp(data[j], recovj, PAGE_SIZE); if (i < NDISKS-2 && j == NDISKS-1) { /* We don't implement the DQ failure scenario, since it's equivalent to a RAID-5 failure (XOR, then recompute Q) */ erra = errb = 0; } else { printf("algo=%-8s faila=%3d(%c) failb=%3d(%c) %s\n", raid6_call.name, i, disk_type(i), j, disk_type(j), (!erra && !errb) ? "OK" : !erra ? "ERRB" : !errb ? "ERRA" : "ERRAB"); } dataptrs[i] = data[i]; dataptrs[j] = data[j]; return erra || errb;}int main(int argc, char *argv[]){ const struct raid6_calls *const *algo; int i, j; int err = 0; makedata(); for (algo = raid6_algos; *algo; algo++) { if (!(*algo)->valid || (*algo)->valid()) { raid6_call = **algo; /* Nuke syndromes */ memset(data[NDISKS-2], 0xee, 2*PAGE_SIZE); /* Generate assumed good syndrome */ raid6_call.gen_syndrome(NDISKS, PAGE_SIZE, (void **)&dataptrs); for (i = 0; i < NDISKS-1; i++) for (j = i+1; j < NDISKS; j++) err += test_disks(i, j); } printf("\n"); } printf("\n"); /* Pick the best algorithm test */ raid6_select_algo(); if (err) printf("\n*** ERRORS FOUND ***\n"); return err;}
/* -*- linux-c -*- ------------------------------------------------------- *
*
* Copyright 2002-2007 H. Peter Anvin - All Rights Reserved
*
* This file is part of the Linux kernel, and is made available under
* the terms of the GNU General Public License version 2 or (at your
* option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
/*
* raid6test.c
*
* Test RAID-6 recovery with various algorithms
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <linux/raid/pq.h>
#define NDISKS 16 /* Including P and Q */
const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(256)));
struct raid6_calls raid6_call;
char *dataptrs[NDISKS];
char data[NDISKS][PAGE_SIZE];
char recovi[PAGE_SIZE], recovj[PAGE_SIZE];
static void makedata(void)
{
int i, j;
for (i = 0; i < NDISKS; i++) {
for (j = 0; j < PAGE_SIZE; j++)
data[i][j] = rand();
dataptrs[i] = data[i];
}
}
static char disk_type(int d)
{
switch (d) {
case NDISKS-2:
return 'P';
case NDISKS-1:
return 'Q';
default:
return 'D';
}
}
static int test_disks(int i, int j)
{
int erra, errb;
memset(recovi, 0xf0, PAGE_SIZE);
memset(recovj, 0xba, PAGE_SIZE);
dataptrs[i] = recovi;
dataptrs[j] = recovj;
raid6_dual_recov(NDISKS, PAGE_SIZE, i, j, (void **)&dataptrs);
erra = memcmp(data[i], recovi, PAGE_SIZE);
errb = memcmp(data[j], recovj, PAGE_SIZE);
if (i < NDISKS-2 && j == NDISKS-1) {
/* We don't implement the DQ failure scenario, since it's
equivalent to a RAID-5 failure (XOR, then recompute Q) */
erra = errb = 0;
} else {
printf("algo=%-8s faila=%3d(%c) failb=%3d(%c) %s\n",
raid6_call.name,
i, disk_type(i),
j, disk_type(j),
(!erra && !errb) ? "OK" :
!erra ? "ERRB" :
!errb ? "ERRA" : "ERRAB");
}
dataptrs[i] = data[i];
dataptrs[j] = data[j];
return erra || errb;
}
int main(int argc, char *argv[])
{
const struct raid6_calls *const *algo;
int i, j;
int err = 0;
makedata();
for (algo = raid6_algos; *algo; algo++) {
if (!(*algo)->valid || (*algo)->valid()) {
raid6_call = **algo;
/* Nuke syndromes */
memset(data[NDISKS-2], 0xee, 2*PAGE_SIZE);
/* Generate assumed good syndrome */
raid6_call.gen_syndrome(NDISKS, PAGE_SIZE,
(void **)&dataptrs);
for (i = 0; i < NDISKS-1; i++)
for (j = i+1; j < NDISKS; j++)
err += test_disks(i, j);
}
printf("\n");
}
printf("\n");
/* Pick the best algorithm test */
raid6_select_algo();
if (err)
printf("\n*** ERRORS FOUND ***\n");
return err;
}