pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / md / raid6test / test.c
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1 /* -*- linux-c -*- ------------------------------------------------------- *
3 * Copyright 2002 H. Peter Anvin - All Rights Reserved
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, Inc., 53 Temple Place Ste 330,
8 * Bostom MA 02111-1307, USA; either version 2 of the License, or
9 * (at your option) any later version; incorporated herein by reference.
11 * ----------------------------------------------------------------------- */
14 * raid6test.c
16 * Test RAID-6 recovery with various algorithms
19 #include <stdlib.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include "raid6.h"
24 #define NDISKS 16 /* Including P and Q */
26 const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(256)));
27 struct raid6_calls raid6_call;
29 char *dataptrs[NDISKS];
30 char data[NDISKS][PAGE_SIZE];
31 char recovi[PAGE_SIZE], recovj[PAGE_SIZE];
33 void makedata(void)
35 int i, j;
37 for ( i = 0 ; i < NDISKS ; i++ ) {
38 for ( j = 0 ; j < PAGE_SIZE ; j++ ) {
39 data[i][j] = rand();
41 dataptrs[i] = data[i];
45 int main(int argc, char *argv[])
47 const struct raid6_calls * const * algo;
48 int i, j;
49 int erra, errb;
51 makedata();
53 for ( algo = raid6_algos ; *algo ; algo++ ) {
54 if ( !(*algo)->valid || (*algo)->valid() ) {
55 raid6_call = **algo;
57 /* Nuke syndromes */
58 memset(data[NDISKS-2], 0xee, 2*PAGE_SIZE);
60 /* Generate assumed good syndrome */
61 raid6_call.gen_syndrome(NDISKS, PAGE_SIZE, (void **)&dataptrs);
63 for ( i = 0 ; i < NDISKS-1 ; i++ ) {
64 for ( j = i+1 ; j < NDISKS ; j++ ) {
65 memset(recovi, 0xf0, PAGE_SIZE);
66 memset(recovj, 0xba, PAGE_SIZE);
68 dataptrs[i] = recovi;
69 dataptrs[j] = recovj;
71 raid6_dual_recov(NDISKS, PAGE_SIZE, i, j, (void **)&dataptrs);
73 erra = memcmp(data[i], recovi, PAGE_SIZE);
74 errb = memcmp(data[j], recovj, PAGE_SIZE);
76 if ( i < NDISKS-2 && j == NDISKS-1 ) {
77 /* We don't implement the DQ failure scenario, since it's
78 equivalent to a RAID-5 failure (XOR, then recompute Q) */
79 } else {
80 printf("algo=%-8s faila=%3d(%c) failb=%3d(%c) %s\n",
81 raid6_call.name,
82 i, (i==NDISKS-2)?'P':'D',
83 j, (j==NDISKS-1)?'Q':(j==NDISKS-2)?'P':'D',
84 (!erra && !errb) ? "OK" :
85 !erra ? "ERRB" :
86 !errb ? "ERRA" :
87 "ERRAB");
90 dataptrs[i] = data[i];
91 dataptrs[j] = data[j];
95 printf("\n");
98 printf("\n");
99 /* Pick the best algorithm test */
100 raid6_select_algo();
102 return 0;