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md: raid6: clean up the style of raid6test/test.c 

Clean up the coding style in raid6test/test.c.  Break it apart into
subfunctions to make the code more readable.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
H. Peter Anvin 2008-02-06 01:39:48 -08:00 committed by Linus Torvalds
parent 98ec302be5
commit 66c811e993
1 changed files with 68 additions and 47 deletions
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115
drivers/md/raid6test/test.c
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@ -1,12 +1,10 @@
/* -*- linux-c -*- ------------------------------------------------------- * /* -*- linux-c -*- ------------------------------------------------------- *
* *
* Copyright 2002 H. Peter Anvin - All Rights Reserved * Copyright 2002-2007 H. Peter Anvin - All Rights Reserved
* *
* This program is free software; you can redistribute it and/or modify * This file is part of the Linux kernel, and is made available under
* it under the terms of the GNU General Public License as published by * the terms of the GNU General Public License version 2 or (at your
* the Free Software Foundation, Inc., 53 Temple Place Ste 330, * option) any later version; incorporated herein by reference.
* Bostom MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
* *
* ----------------------------------------------------------------------- */ * ----------------------------------------------------------------------- */
@ -30,67 +28,87 @@ char *dataptrs[NDISKS];
char data[NDISKS][PAGE_SIZE]; char data[NDISKS][PAGE_SIZE];
char recovi[PAGE_SIZE], recovj[PAGE_SIZE]; char recovi[PAGE_SIZE], recovj[PAGE_SIZE];
void makedata(void) static void makedata(void)
{ {
int i, j; int i, j;
for ( i = 0 ; i < NDISKS ; i++ ) { for (i = 0; i < NDISKS; i++) {
for ( j = 0 ; j < PAGE_SIZE ; j++ ) { for (j = 0; j < PAGE_SIZE; j++)
data[i][j] = rand(); data[i][j] = rand();
}
dataptrs[i] = data[i]; 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[]) int main(int argc, char *argv[])
{ {
const struct raid6_calls * const * algo; const struct raid6_calls *const *algo;
int i, j; int i, j;
int erra, errb; int err = 0;
makedata(); makedata();
for ( algo = raid6_algos ; *algo ; algo++ ) { for (algo = raid6_algos; *algo; algo++) {
if ( !(*algo)->valid || (*algo)->valid() ) { if (!(*algo)->valid || (*algo)->valid()) {
raid6_call = **algo; raid6_call = **algo;
/* Nuke syndromes */ /* Nuke syndromes */
memset(data[NDISKS-2], 0xee, 2*PAGE_SIZE); memset(data[NDISKS-2], 0xee, 2*PAGE_SIZE);
/* Generate assumed good syndrome */ /* Generate assumed good syndrome */
raid6_call.gen_syndrome(NDISKS, PAGE_SIZE, (void **)&dataptrs); raid6_call.gen_syndrome(NDISKS, PAGE_SIZE,
(void **)&dataptrs);
for ( i = 0 ; i < NDISKS-1 ; i++ ) { for (i = 0; i < NDISKS-1; i++)
for ( j = i+1 ; j < NDISKS ; j++ ) { for (j = i+1; j < NDISKS; j++)
memset(recovi, 0xf0, PAGE_SIZE); err += test_disks(i, j);
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");
} }
@ -99,5 +117,8 @@ int main(int argc, char *argv[])
/* Pick the best algorithm test */ /* Pick the best algorithm test */
raid6_select_algo(); raid6_select_algo();
return 0; if (err)
printf("\n*** ERRORS FOUND ***\n");
return err;
} }