diff options
Diffstat (limited to 'lib/raid6/test')
| -rw-r--r-- | lib/raid6/test/Makefile | 72 | ||||
| -rw-r--r-- | lib/raid6/test/test.c | 124 |
2 files changed, 196 insertions, 0 deletions
diff --git a/lib/raid6/test/Makefile b/lib/raid6/test/Makefile new file mode 100644 index 000000000000..aa651697b6dc --- /dev/null +++ b/lib/raid6/test/Makefile @@ -0,0 +1,72 @@ +# +# This is a simple Makefile to test some of the RAID-6 code +# from userspace. +# + +CC = gcc +OPTFLAGS = -O2 # Adjust as desired +CFLAGS = -I.. -I ../../../include -g $(OPTFLAGS) +LD = ld +AWK = awk -f +AR = ar +RANLIB = ranlib + +.c.o: + $(CC) $(CFLAGS) -c -o $@ $< + +%.c: ../%.c + cp -f $< $@ + +%.uc: ../%.uc + cp -f $< $@ + +all: raid6.a raid6test + +raid6.a: int1.o int2.o int4.o int8.o int16.o int32.o mmx.o sse1.o sse2.o \ + altivec1.o altivec2.o altivec4.o altivec8.o recov.o algos.o \ + tables.o + rm -f $@ + $(AR) cq $@ $^ + $(RANLIB) $@ + +raid6test: test.c raid6.a + $(CC) $(CFLAGS) -o raid6test $^ + +altivec1.c: altivec.uc ../unroll.awk + $(AWK) ../unroll.awk -vN=1 < altivec.uc > $@ + +altivec2.c: altivec.uc ../unroll.awk + $(AWK) ../unroll.awk -vN=2 < altivec.uc > $@ + +altivec4.c: altivec.uc ../unroll.awk + $(AWK) ../unroll.awk -vN=4 < altivec.uc > $@ + +altivec8.c: altivec.uc ../unroll.awk + $(AWK) ../unroll.awk -vN=8 < altivec.uc > $@ + +int1.c: int.uc ../unroll.awk + $(AWK) ../unroll.awk -vN=1 < int.uc > $@ + +int2.c: int.uc ../unroll.awk + $(AWK) ../unroll.awk -vN=2 < int.uc > $@ + +int4.c: int.uc ../unroll.awk + $(AWK) ../unroll.awk -vN=4 < int.uc > $@ + +int8.c: int.uc ../unroll.awk + $(AWK) ../unroll.awk -vN=8 < int.uc > $@ + +int16.c: int.uc ../unroll.awk + $(AWK) ../unroll.awk -vN=16 < int.uc > $@ + +int32.c: int.uc ../unroll.awk + $(AWK) ../unroll.awk -vN=32 < int.uc > $@ + +tables.c: mktables + ./mktables > tables.c + +clean: + rm -f *.o *.a mktables mktables.c *.uc int*.c altivec*.c tables.c raid6test + +spotless: clean + rm -f *~ diff --git a/lib/raid6/test/test.c b/lib/raid6/test/test.c new file mode 100644 index 000000000000..7a930318b17d --- /dev/null +++ b/lib/raid6/test/test.c @@ -0,0 +1,124 @@ +/* -*- 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; +} |