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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* -*- linux-c -*- ------------------------------------------------------- *
3 *
4 * Copyright 2002-2007 H. Peter Anvin - All Rights Reserved
5 *
6 * ----------------------------------------------------------------------- */
7
8/*
9 * raid6test.c
10 *
11 * Test RAID-6 recovery with various algorithms
12 */
13
14#include <stdlib.h>
15#include <stdio.h>
16#include <string.h>
17#include <linux/raid/pq.h>
18
19#define NDISKS 16 /* Including P and Q */
20
21const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
22struct raid6_calls raid6_call;
23
24char *dataptrs[NDISKS];
25char data[NDISKS][PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
26char recovi[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
27char recovj[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
28
29static void makedata(int start, int stop)
30{
31 int i, j;
32
33 for (i = start; i <= stop; i++) {
34 for (j = 0; j < PAGE_SIZE; j++)
35 data[i][j] = rand();
36
37 dataptrs[i] = data[i];
38 }
39}
40
41static char disk_type(int d)
42{
43 switch (d) {
44 case NDISKS-2:
45 return 'P';
46 case NDISKS-1:
47 return 'Q';
48 default:
49 return 'D';
50 }
51}
52
53static int test_disks(int i, int j)
54{
55 int erra, errb;
56
57 memset(recovi, 0xf0, PAGE_SIZE);
58 memset(recovj, 0xba, PAGE_SIZE);
59
60 dataptrs[i] = recovi;
61 dataptrs[j] = recovj;
62
63 raid6_dual_recov(NDISKS, PAGE_SIZE, i, j, (void **)&dataptrs);
64
65 erra = memcmp(data[i], recovi, PAGE_SIZE);
66 errb = memcmp(data[j], recovj, PAGE_SIZE);
67
68 if (i < NDISKS-2 && j == NDISKS-1) {
69 /* We don't implement the DQ failure scenario, since it's
70 equivalent to a RAID-5 failure (XOR, then recompute Q) */
71 erra = errb = 0;
72 } else {
73 printf("algo=%-8s faila=%3d(%c) failb=%3d(%c) %s\n",
74 raid6_call.name,
75 i, disk_type(i),
76 j, disk_type(j),
77 (!erra && !errb) ? "OK" :
78 !erra ? "ERRB" :
79 !errb ? "ERRA" : "ERRAB");
80 }
81
82 dataptrs[i] = data[i];
83 dataptrs[j] = data[j];
84
85 return erra || errb;
86}
87
88int main(int argc, char *argv[])
89{
90 const struct raid6_calls *const *algo;
91 const struct raid6_recov_calls *const *ra;
92 int i, j, p1, p2;
93 int err = 0;
94
95 makedata(0, NDISKS-1);
96
97 for (ra = raid6_recov_algos; *ra; ra++) {
98 if ((*ra)->valid && !(*ra)->valid())
99 continue;
100
101 raid6_2data_recov = (*ra)->data2;
102 raid6_datap_recov = (*ra)->datap;
103
104 printf("using recovery %s\n", (*ra)->name);
105
106 for (algo = raid6_algos; *algo; algo++) {
107 if ((*algo)->valid && !(*algo)->valid())
108 continue;
109
110 raid6_call = **algo;
111
112 /* Nuke syndromes */
113 memset(data[NDISKS-2], 0xee, 2*PAGE_SIZE);
114
115 /* Generate assumed good syndrome */
116 raid6_call.gen_syndrome(NDISKS, PAGE_SIZE,
117 (void **)&dataptrs);
118
119 for (i = 0; i < NDISKS-1; i++)
120 for (j = i+1; j < NDISKS; j++)
121 err += test_disks(i, j);
122
123 if (!raid6_call.xor_syndrome)
124 continue;
125
126 for (p1 = 0; p1 < NDISKS-2; p1++)
127 for (p2 = p1; p2 < NDISKS-2; p2++) {
128
129 /* Simulate rmw run */
130 raid6_call.xor_syndrome(NDISKS, p1, p2, PAGE_SIZE,
131 (void **)&dataptrs);
132 makedata(p1, p2);
133 raid6_call.xor_syndrome(NDISKS, p1, p2, PAGE_SIZE,
134 (void **)&dataptrs);
135
136 for (i = 0; i < NDISKS-1; i++)
137 for (j = i+1; j < NDISKS; j++)
138 err += test_disks(i, j);
139 }
140
141 }
142 printf("\n");
143 }
144
145 printf("\n");
146 /* Pick the best algorithm test */
147 raid6_select_algo();
148
149 if (err)
150 printf("\n*** ERRORS FOUND ***\n");
151
152 return err;
153}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/* -*- linux-c -*- ------------------------------------------------------- *
3 *
4 * Copyright 2002-2007 H. Peter Anvin - All Rights Reserved
5 *
6 * ----------------------------------------------------------------------- */
7
8/*
9 * raid6test.c
10 *
11 * Test RAID-6 recovery with various algorithms
12 */
13
14#include <stdlib.h>
15#include <stdio.h>
16#include <string.h>
17#include <linux/raid/pq.h>
18
19#define NDISKS 16 /* Including P and Q */
20
21const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
22struct raid6_calls raid6_call;
23
24char *dataptrs[NDISKS];
25char data[NDISKS][PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
26char recovi[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
27char recovj[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
28
29static void makedata(int start, int stop)
30{
31 int i, j;
32
33 for (i = start; i <= stop; i++) {
34 for (j = 0; j < PAGE_SIZE; j++)
35 data[i][j] = rand();
36
37 dataptrs[i] = data[i];
38 }
39}
40
41static char disk_type(int d)
42{
43 switch (d) {
44 case NDISKS-2:
45 return 'P';
46 case NDISKS-1:
47 return 'Q';
48 default:
49 return 'D';
50 }
51}
52
53static int test_disks(int i, int j)
54{
55 int erra, errb;
56
57 memset(recovi, 0xf0, PAGE_SIZE);
58 memset(recovj, 0xba, PAGE_SIZE);
59
60 dataptrs[i] = recovi;
61 dataptrs[j] = recovj;
62
63 raid6_dual_recov(NDISKS, PAGE_SIZE, i, j, (void **)&dataptrs);
64
65 erra = memcmp(data[i], recovi, PAGE_SIZE);
66 errb = memcmp(data[j], recovj, PAGE_SIZE);
67
68 if (i < NDISKS-2 && j == NDISKS-1) {
69 /* We don't implement the DQ failure scenario, since it's
70 equivalent to a RAID-5 failure (XOR, then recompute Q) */
71 erra = errb = 0;
72 } else {
73 printf("algo=%-8s faila=%3d(%c) failb=%3d(%c) %s\n",
74 raid6_call.name,
75 i, disk_type(i),
76 j, disk_type(j),
77 (!erra && !errb) ? "OK" :
78 !erra ? "ERRB" :
79 !errb ? "ERRA" : "ERRAB");
80 }
81
82 dataptrs[i] = data[i];
83 dataptrs[j] = data[j];
84
85 return erra || errb;
86}
87
88int main(int argc, char *argv[])
89{
90 const struct raid6_calls *const *algo;
91 const struct raid6_recov_calls *const *ra;
92 int i, j, p1, p2;
93 int err = 0;
94
95 makedata(0, NDISKS-1);
96
97 for (ra = raid6_recov_algos; *ra; ra++) {
98 if ((*ra)->valid && !(*ra)->valid())
99 continue;
100
101 raid6_2data_recov = (*ra)->data2;
102 raid6_datap_recov = (*ra)->datap;
103
104 printf("using recovery %s\n", (*ra)->name);
105
106 for (algo = raid6_algos; *algo; algo++) {
107 if ((*algo)->valid && !(*algo)->valid())
108 continue;
109
110 raid6_call = **algo;
111
112 /* Nuke syndromes */
113 memset(data[NDISKS-2], 0xee, 2*PAGE_SIZE);
114
115 /* Generate assumed good syndrome */
116 raid6_call.gen_syndrome(NDISKS, PAGE_SIZE,
117 (void **)&dataptrs);
118
119 for (i = 0; i < NDISKS-1; i++)
120 for (j = i+1; j < NDISKS; j++)
121 err += test_disks(i, j);
122
123 if (!raid6_call.xor_syndrome)
124 continue;
125
126 for (p1 = 0; p1 < NDISKS-2; p1++)
127 for (p2 = p1; p2 < NDISKS-2; p2++) {
128
129 /* Simulate rmw run */
130 raid6_call.xor_syndrome(NDISKS, p1, p2, PAGE_SIZE,
131 (void **)&dataptrs);
132 makedata(p1, p2);
133 raid6_call.xor_syndrome(NDISKS, p1, p2, PAGE_SIZE,
134 (void **)&dataptrs);
135
136 for (i = 0; i < NDISKS-1; i++)
137 for (j = i+1; j < NDISKS; j++)
138 err += test_disks(i, j);
139 }
140
141 }
142 printf("\n");
143 }
144
145 printf("\n");
146 /* Pick the best algorithm test */
147 raid6_select_algo();
148
149 if (err)
150 printf("\n*** ERRORS FOUND ***\n");
151
152 return err;
153}