/* -*- linux-c -*- ------------------------------------------------------- * * * Copyright 2002 H. Peter Anvin - All Rights Reserved * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, Inc., 53 Temple Place Ste 330, * Bostom MA 02111-1307, USA; either version 2 of the License, 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 "raid6.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];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]; }}int main(int argc, char *argv[]){ const struct raid6_calls * const * algo; int i, j; int erra, errb; 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++ ) { 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) */ } else { printf("algo=%-8s faila=%3d(%c) failb=%3d(%c) %s\n", raid6_call.name, i, (i==NDISKS-2)?'P':'D', j, (j==NDISKS-1)?'Q':(j==NDISKS-2)?'P':'D', (!erra && !errb) ? "OK" : !erra ? "ERRB" : !errb ? "ERRA" : "ERRAB"); } dataptrs[i] = data[i]; dataptrs[j] = data[j]; } } } printf("\n"); } printf("\n"); /* Pick the best algorithm test */ raid6_select_algo(); return 0;}
/* -*- linux-c -*- ------------------------------------------------------- *
*
* Copyright 2002 H. Peter Anvin - All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, Inc., 53 Temple Place Ste 330,
* Bostom MA 02111-1307, USA; either version 2 of the License, 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 "raid6.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];
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];
}
}
int main(int argc, char *argv[])
{
const struct raid6_calls * const * algo;
int i, j;
int erra, errb;
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++ ) {
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) */
} else {
printf("algo=%-8s faila=%3d(%c) failb=%3d(%c) %s\n",
raid6_call.name,
i, (i==NDISKS-2)?'P':'D',
j, (j==NDISKS-1)?'Q':(j==NDISKS-2)?'P':'D',
(!erra && !errb) ? "OK" :
!erra ? "ERRB" :
!errb ? "ERRA" :
"ERRAB");
}
dataptrs[i] = data[i];
dataptrs[j] = data[j];
}
}
}
printf("\n");
}
printf("\n");
/* Pick the best algorithm test */
raid6_select_algo();
return 0;
}