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-rw-r--r--src/isa-l/erasure_code/erasure_code_test.c764
1 files changed, 764 insertions, 0 deletions
diff --git a/src/isa-l/erasure_code/erasure_code_test.c b/src/isa-l/erasure_code/erasure_code_test.c
new file mode 100644
index 000000000..a1736afd5
--- /dev/null
+++ b/src/isa-l/erasure_code/erasure_code_test.c
@@ -0,0 +1,764 @@
+/**********************************************************************
+ Copyright(c) 2011-2015 Intel Corporation All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the
+ distribution.
+ * Neither the name of Intel Corporation nor the names of its
+ contributors may be used to endorse or promote products derived
+ from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**********************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h> // for memset, memcmp
+#include "erasure_code.h"
+#include "types.h"
+
+#define TEST_LEN 8192
+#define TEST_SIZE (TEST_LEN/2)
+
+#ifndef TEST_SOURCES
+# define TEST_SOURCES 127
+#endif
+#ifndef RANDOMS
+# define RANDOMS 200
+#endif
+
+#define MMAX TEST_SOURCES
+#define KMAX TEST_SOURCES
+
+#define EFENCE_TEST_MIN_SIZE 16
+#define EFENCE_TEST_MAX_SIZE EFENCE_TEST_MIN_SIZE + 0x100
+
+#ifdef EC_ALIGNED_ADDR
+// Define power of 2 range to check ptr, len alignment
+# define PTR_ALIGN_CHK_B 0
+# define LEN_ALIGN_CHK_B 0 // 0 for aligned only
+#else
+// Define power of 2 range to check ptr, len alignment
+# define PTR_ALIGN_CHK_B 32
+# define LEN_ALIGN_CHK_B 32 // 0 for aligned only
+#endif
+
+#ifndef TEST_SEED
+#define TEST_SEED 11
+#endif
+
+typedef unsigned char u8;
+
+void dump(unsigned char *buf, int len)
+{
+ int i;
+ for (i = 0; i < len;) {
+ printf(" %2x", 0xff & buf[i++]);
+ if (i % 32 == 0)
+ printf("\n");
+ }
+ printf("\n");
+}
+
+void dump_matrix(unsigned char **s, int k, int m)
+{
+ int i, j;
+ for (i = 0; i < k; i++) {
+ for (j = 0; j < m; j++) {
+ printf(" %2x", s[i][j]);
+ }
+ printf("\n");
+ }
+ printf("\n");
+}
+
+void dump_u8xu8(unsigned char *s, int k, int m)
+{
+ int i, j;
+ for (i = 0; i < k; i++) {
+ for (j = 0; j < m; j++) {
+ printf(" %2x", 0xff & s[j + (i * m)]);
+ }
+ printf("\n");
+ }
+ printf("\n");
+}
+
+// Generate Random errors
+static void gen_err_list(unsigned char *src_err_list,
+ unsigned char *src_in_err, int *pnerrs, int *pnsrcerrs, int k, int m)
+{
+ int i, err;
+ int nerrs = 0, nsrcerrs = 0;
+
+ for (i = 0, nerrs = 0, nsrcerrs = 0; i < m && nerrs < m - k; i++) {
+ err = 1 & rand();
+ src_in_err[i] = err;
+ if (err) {
+ src_err_list[nerrs++] = i;
+ if (i < k) {
+ nsrcerrs++;
+ }
+ }
+ }
+ if (nerrs == 0) { // should have at least one error
+ while ((err = (rand() % KMAX)) >= m) ;
+ src_err_list[nerrs++] = err;
+ src_in_err[err] = 1;
+ if (err < k)
+ nsrcerrs = 1;
+ }
+ *pnerrs = nerrs;
+ *pnsrcerrs = nsrcerrs;
+ return;
+}
+
+#define NO_INVERT_MATRIX -2
+// Generate decode matrix from encode matrix
+static int gf_gen_decode_matrix(unsigned char *encode_matrix,
+ unsigned char *decode_matrix,
+ unsigned char *invert_matrix,
+ unsigned int *decode_index,
+ unsigned char *src_err_list,
+ unsigned char *src_in_err,
+ int nerrs, int nsrcerrs, int k, int m)
+{
+ int i, j, p;
+ int r;
+ unsigned char *backup, *b, s;
+ int incr = 0;
+
+ b = malloc(MMAX * KMAX);
+ backup = malloc(MMAX * KMAX);
+
+ if (b == NULL || backup == NULL) {
+ printf("Test failure! Error with malloc\n");
+ free(b);
+ free(backup);
+ return -1;
+ }
+ // Construct matrix b by removing error rows
+ for (i = 0, r = 0; i < k; i++, r++) {
+ while (src_in_err[r])
+ r++;
+ for (j = 0; j < k; j++) {
+ b[k * i + j] = encode_matrix[k * r + j];
+ backup[k * i + j] = encode_matrix[k * r + j];
+ }
+ decode_index[i] = r;
+ }
+ incr = 0;
+ while (gf_invert_matrix(b, invert_matrix, k) < 0) {
+ if (nerrs == (m - k)) {
+ free(b);
+ free(backup);
+ printf("BAD MATRIX\n");
+ return NO_INVERT_MATRIX;
+ }
+ incr++;
+ memcpy(b, backup, MMAX * KMAX);
+ for (i = nsrcerrs; i < nerrs - nsrcerrs; i++) {
+ if (src_err_list[i] == (decode_index[k - 1] + incr)) {
+ // skip the erased parity line
+ incr++;
+ continue;
+ }
+ }
+ if (decode_index[k - 1] + incr >= m) {
+ free(b);
+ free(backup);
+ printf("BAD MATRIX\n");
+ return NO_INVERT_MATRIX;
+ }
+ decode_index[k - 1] += incr;
+ for (j = 0; j < k; j++)
+ b[k * (k - 1) + j] = encode_matrix[k * decode_index[k - 1] + j];
+
+ };
+
+ for (i = 0; i < nsrcerrs; i++) {
+ for (j = 0; j < k; j++) {
+ decode_matrix[k * i + j] = invert_matrix[k * src_err_list[i] + j];
+ }
+ }
+ /* src_err_list from encode_matrix * invert of b for parity decoding */
+ for (p = nsrcerrs; p < nerrs; p++) {
+ for (i = 0; i < k; i++) {
+ s = 0;
+ for (j = 0; j < k; j++)
+ s ^= gf_mul(invert_matrix[j * k + i],
+ encode_matrix[k * src_err_list[p] + j]);
+
+ decode_matrix[k * p + i] = s;
+ }
+ }
+ free(b);
+ free(backup);
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ int re = 0;
+ int i, j, p, rtest, m, k;
+ int nerrs, nsrcerrs;
+ void *buf;
+ unsigned int decode_index[MMAX];
+ unsigned char *temp_buffs[TEST_SOURCES], *buffs[TEST_SOURCES];
+ unsigned char *encode_matrix, *decode_matrix, *invert_matrix, *g_tbls;
+ unsigned char src_in_err[TEST_SOURCES], src_err_list[TEST_SOURCES];
+ unsigned char *recov[TEST_SOURCES];
+
+ int rows, align, size;
+ unsigned char *efence_buffs[TEST_SOURCES];
+ unsigned int offset;
+ u8 *ubuffs[TEST_SOURCES];
+ u8 *temp_ubuffs[TEST_SOURCES];
+
+ printf("erasure_code_test: %dx%d ", TEST_SOURCES, TEST_LEN);
+ srand(TEST_SEED);
+
+ // Allocate the arrays
+ for (i = 0; i < TEST_SOURCES; i++) {
+ if (posix_memalign(&buf, 64, TEST_LEN)) {
+ printf("alloc error: Fail");
+ return -1;
+ }
+ buffs[i] = buf;
+ }
+
+ for (i = 0; i < TEST_SOURCES; i++) {
+ if (posix_memalign(&buf, 64, TEST_LEN)) {
+ printf("alloc error: Fail");
+ return -1;
+ }
+ temp_buffs[i] = buf;
+ }
+
+ // Test erasure code by encode and recovery
+
+ encode_matrix = malloc(MMAX * KMAX);
+ decode_matrix = malloc(MMAX * KMAX);
+ invert_matrix = malloc(MMAX * KMAX);
+ g_tbls = malloc(KMAX * TEST_SOURCES * 32);
+ if (encode_matrix == NULL || decode_matrix == NULL
+ || invert_matrix == NULL || g_tbls == NULL) {
+ printf("Test failure! Error with malloc\n");
+ return -1;
+ }
+ // Pick a first test
+ m = 9;
+ k = 5;
+ if (m > MMAX || k > KMAX)
+ return -1;
+
+ // Make random data
+ for (i = 0; i < k; i++)
+ for (j = 0; j < TEST_LEN; j++)
+ buffs[i][j] = rand();
+
+ // Generate encode matrix encode_matrix
+ // The matrix generated by gf_gen_rs_matrix
+ // is not always invertable.
+ gf_gen_rs_matrix(encode_matrix, m, k);
+
+ // Generate g_tbls from encode matrix encode_matrix
+ ec_init_tables(k, m - k, &encode_matrix[k * k], g_tbls);
+
+ // Perform matrix dot_prod for EC encoding
+ // using g_tbls from encode matrix encode_matrix
+ ec_encode_data(TEST_LEN, k, m - k, g_tbls, buffs, &buffs[k]);
+
+ // Choose random buffers to be in erasure
+ memset(src_in_err, 0, TEST_SOURCES);
+ gen_err_list(src_err_list, src_in_err, &nerrs, &nsrcerrs, k, m);
+
+ // Generate decode matrix
+ re = gf_gen_decode_matrix(encode_matrix, decode_matrix,
+ invert_matrix, decode_index, src_err_list, src_in_err,
+ nerrs, nsrcerrs, k, m);
+ if (re != 0) {
+ printf("Fail to gf_gen_decode_matrix\n");
+ return -1;
+ }
+ // Pack recovery array as list of valid sources
+ // Its order must be the same as the order
+ // to generate matrix b in gf_gen_decode_matrix
+ for (i = 0; i < k; i++) {
+ recov[i] = buffs[decode_index[i]];
+ }
+
+ // Recover data
+ ec_init_tables(k, nerrs, decode_matrix, g_tbls);
+ ec_encode_data(TEST_LEN, k, nerrs, g_tbls, recov, &temp_buffs[k]);
+ for (i = 0; i < nerrs; i++) {
+
+ if (0 != memcmp(temp_buffs[k + i], buffs[src_err_list[i]], TEST_LEN)) {
+ printf("Fail error recovery (%d, %d, %d)\n", m, k, nerrs);
+ printf(" - erase list = ");
+ for (j = 0; j < nerrs; j++)
+ printf(" %d", src_err_list[j]);
+ printf(" - Index = ");
+ for (p = 0; p < k; p++)
+ printf(" %d", decode_index[p]);
+ printf("\nencode_matrix:\n");
+ dump_u8xu8((u8 *) encode_matrix, m, k);
+ printf("inv b:\n");
+ dump_u8xu8((u8 *) invert_matrix, k, k);
+ printf("\ndecode_matrix:\n");
+ dump_u8xu8((u8 *) decode_matrix, m, k);
+ printf("recov %d:", src_err_list[i]);
+ dump(temp_buffs[k + i], 25);
+ printf("orig :");
+ dump(buffs[src_err_list[i]], 25);
+ return -1;
+ }
+ }
+
+ // Pick a first test
+ m = 9;
+ k = 5;
+ if (m > MMAX || k > KMAX)
+ return -1;
+
+ // Make random data
+ for (i = 0; i < k; i++)
+ for (j = 0; j < TEST_LEN; j++)
+ buffs[i][j] = rand();
+
+ // The matrix generated by gf_gen_cauchy1_matrix
+ // is always invertable.
+ gf_gen_cauchy1_matrix(encode_matrix, m, k);
+
+ // Generate g_tbls from encode matrix encode_matrix
+ ec_init_tables(k, m - k, &encode_matrix[k * k], g_tbls);
+
+ // Perform matrix dot_prod for EC encoding
+ // using g_tbls from encode matrix encode_matrix
+ ec_encode_data(TEST_LEN, k, m - k, g_tbls, buffs, &buffs[k]);
+
+ // Choose random buffers to be in erasure
+ memset(src_in_err, 0, TEST_SOURCES);
+ gen_err_list(src_err_list, src_in_err, &nerrs, &nsrcerrs, k, m);
+
+ // Generate decode matrix
+ re = gf_gen_decode_matrix(encode_matrix, decode_matrix,
+ invert_matrix, decode_index, src_err_list, src_in_err,
+ nerrs, nsrcerrs, k, m);
+ if (re != 0) {
+ printf("Fail to gf_gen_decode_matrix\n");
+ return -1;
+ }
+ // Pack recovery array as list of valid sources
+ // Its order must be the same as the order
+ // to generate matrix b in gf_gen_decode_matrix
+ for (i = 0; i < k; i++) {
+ recov[i] = buffs[decode_index[i]];
+ }
+
+ // Recover data
+ ec_init_tables(k, nerrs, decode_matrix, g_tbls);
+ ec_encode_data(TEST_LEN, k, nerrs, g_tbls, recov, &temp_buffs[k]);
+ for (i = 0; i < nerrs; i++) {
+
+ if (0 != memcmp(temp_buffs[k + i], buffs[src_err_list[i]], TEST_LEN)) {
+ printf("Fail error recovery (%d, %d, %d)\n", m, k, nerrs);
+ printf(" - erase list = ");
+ for (j = 0; j < nerrs; j++)
+ printf(" %d", src_err_list[j]);
+ printf(" - Index = ");
+ for (p = 0; p < k; p++)
+ printf(" %d", decode_index[p]);
+ printf("\nencode_matrix:\n");
+ dump_u8xu8((u8 *) encode_matrix, m, k);
+ printf("inv b:\n");
+ dump_u8xu8((u8 *) invert_matrix, k, k);
+ printf("\ndecode_matrix:\n");
+ dump_u8xu8((u8 *) decode_matrix, m, k);
+ printf("recov %d:", src_err_list[i]);
+ dump(temp_buffs[k + i], 25);
+ printf("orig :");
+ dump(buffs[src_err_list[i]], 25);
+ return -1;
+ }
+ }
+
+ // Do more random tests
+ for (rtest = 0; rtest < RANDOMS; rtest++) {
+ while ((m = (rand() % MMAX)) < 2) ;
+ while ((k = (rand() % KMAX)) >= m || k < 1) ;
+
+ if (m > MMAX || k > KMAX)
+ continue;
+
+ // Make random data
+ for (i = 0; i < k; i++)
+ for (j = 0; j < TEST_LEN; j++)
+ buffs[i][j] = rand();
+
+ // The matrix generated by gf_gen_cauchy1_matrix
+ // is always invertable.
+ gf_gen_cauchy1_matrix(encode_matrix, m, k);
+
+ // Make parity vects
+ // Generate g_tbls from encode matrix a
+ ec_init_tables(k, m - k, &encode_matrix[k * k], g_tbls);
+ // Perform matrix dot_prod for EC encoding
+ // using g_tbls from encode matrix a
+ ec_encode_data(TEST_LEN, k, m - k, g_tbls, buffs, &buffs[k]);
+
+ // Random errors
+ memset(src_in_err, 0, TEST_SOURCES);
+ gen_err_list(src_err_list, src_in_err, &nerrs, &nsrcerrs, k, m);
+
+ // Generate decode matrix
+ re = gf_gen_decode_matrix(encode_matrix, decode_matrix,
+ invert_matrix, decode_index, src_err_list,
+ src_in_err, nerrs, nsrcerrs, k, m);
+ if (re != 0) {
+ printf("Fail to gf_gen_decode_matrix\n");
+ return -1;
+ }
+ // Pack recovery array as list of valid sources
+ // Its order must be the same as the order
+ // to generate matrix b in gf_gen_decode_matrix
+ for (i = 0; i < k; i++) {
+ recov[i] = buffs[decode_index[i]];
+ }
+
+ // Recover data
+ ec_init_tables(k, nerrs, decode_matrix, g_tbls);
+ ec_encode_data(TEST_LEN, k, nerrs, g_tbls, recov, &temp_buffs[k]);
+
+ for (i = 0; i < nerrs; i++) {
+
+ if (0 != memcmp(temp_buffs[k + i], buffs[src_err_list[i]], TEST_LEN)) {
+ printf("Fail error recovery (%d, %d, %d) - ", m, k, nerrs);
+ printf(" - erase list = ");
+ for (j = 0; j < nerrs; j++)
+ printf(" %d", src_err_list[j]);
+ printf(" - Index = ");
+ for (p = 0; p < k; p++)
+ printf(" %d", decode_index[p]);
+ printf("\nencode_matrix:\n");
+ dump_u8xu8((u8 *) encode_matrix, m, k);
+ printf("inv b:\n");
+ dump_u8xu8((u8 *) invert_matrix, k, k);
+ printf("\ndecode_matrix:\n");
+ dump_u8xu8((u8 *) decode_matrix, m, k);
+ printf("orig data:\n");
+ dump_matrix(buffs, m, 25);
+ printf("orig :");
+ dump(buffs[src_err_list[i]], 25);
+ printf("recov %d:", src_err_list[i]);
+ dump(temp_buffs[k + i], 25);
+ return -1;
+ }
+ }
+ putchar('.');
+ }
+
+ // Run tests at end of buffer for Electric Fence
+ k = 16;
+ align = (LEN_ALIGN_CHK_B != 0) ? 1 : 16;
+ if (k > KMAX)
+ return -1;
+
+ for (rows = 1; rows <= 16; rows++) {
+ m = k + rows;
+ if (m > MMAX)
+ return -1;
+
+ // Make random data
+ for (i = 0; i < k; i++)
+ for (j = 0; j < TEST_LEN; j++)
+ buffs[i][j] = rand();
+
+ for (size = EFENCE_TEST_MIN_SIZE; size <= EFENCE_TEST_MAX_SIZE; size += align) {
+ for (i = 0; i < m; i++) { // Line up TEST_SIZE from end
+ efence_buffs[i] = buffs[i] + TEST_LEN - size;
+ }
+
+ // The matrix generated by gf_gen_cauchy1_matrix
+ // is always invertable.
+ gf_gen_cauchy1_matrix(encode_matrix, m, k);
+
+ // Make parity vects
+ // Generate g_tbls from encode matrix a
+ ec_init_tables(k, m - k, &encode_matrix[k * k], g_tbls);
+ // Perform matrix dot_prod for EC encoding
+ // using g_tbls from encode matrix a
+ ec_encode_data(size, k, m - k, g_tbls, efence_buffs, &efence_buffs[k]);
+
+ // Random errors
+ memset(src_in_err, 0, TEST_SOURCES);
+ gen_err_list(src_err_list, src_in_err, &nerrs, &nsrcerrs, k, m);
+
+ // Generate decode matrix
+ re = gf_gen_decode_matrix(encode_matrix, decode_matrix,
+ invert_matrix, decode_index, src_err_list,
+ src_in_err, nerrs, nsrcerrs, k, m);
+ if (re != 0) {
+ printf("Fail to gf_gen_decode_matrix\n");
+ return -1;
+ }
+ // Pack recovery array as list of valid sources
+ // Its order must be the same as the order
+ // to generate matrix b in gf_gen_decode_matrix
+ for (i = 0; i < k; i++) {
+ recov[i] = efence_buffs[decode_index[i]];
+ }
+
+ // Recover data
+ ec_init_tables(k, nerrs, decode_matrix, g_tbls);
+ ec_encode_data(size, k, nerrs, g_tbls, recov, &temp_buffs[k]);
+
+ for (i = 0; i < nerrs; i++) {
+
+ if (0 !=
+ memcmp(temp_buffs[k + i], efence_buffs[src_err_list[i]],
+ size)) {
+ printf("Efence: Fail error recovery (%d, %d, %d)\n", m,
+ k, nerrs);
+
+ printf("size = %d\n", size);
+
+ printf("Test erase list = ");
+ for (j = 0; j < nerrs; j++)
+ printf(" %d", src_err_list[j]);
+ printf(" - Index = ");
+ for (p = 0; p < k; p++)
+ printf(" %d", decode_index[p]);
+ printf("\nencode_matrix:\n");
+ dump_u8xu8((u8 *) encode_matrix, m, k);
+ printf("inv b:\n");
+ dump_u8xu8((u8 *) invert_matrix, k, k);
+ printf("\ndecode_matrix:\n");
+ dump_u8xu8((u8 *) decode_matrix, m, k);
+
+ printf("recov %d:", src_err_list[i]);
+ dump(temp_buffs[k + i], align);
+ printf("orig :");
+ dump(efence_buffs[src_err_list[i]], align);
+ return -1;
+ }
+ }
+ }
+
+ }
+
+ // Test rand ptr alignment if available
+
+ for (rtest = 0; rtest < RANDOMS; rtest++) {
+ while ((m = (rand() % MMAX)) < 2) ;
+ while ((k = (rand() % KMAX)) >= m || k < 1) ;
+
+ if (m > MMAX || k > KMAX)
+ continue;
+
+ size = (TEST_LEN - PTR_ALIGN_CHK_B) & ~15;
+
+ offset = (PTR_ALIGN_CHK_B != 0) ? 1 : PTR_ALIGN_CHK_B;
+ // Add random offsets
+ for (i = 0; i < m; i++) {
+ memset(buffs[i], 0, TEST_LEN); // zero pad to check write-over
+ memset(temp_buffs[i], 0, TEST_LEN); // zero pad to check write-over
+ ubuffs[i] = buffs[i] + (rand() & (PTR_ALIGN_CHK_B - offset));
+ temp_ubuffs[i] = temp_buffs[i] + (rand() & (PTR_ALIGN_CHK_B - offset));
+ }
+
+ for (i = 0; i < k; i++)
+ for (j = 0; j < size; j++)
+ ubuffs[i][j] = rand();
+
+ // The matrix generated by gf_gen_cauchy1_matrix
+ // is always invertable.
+ gf_gen_cauchy1_matrix(encode_matrix, m, k);
+
+ // Make parity vects
+ // Generate g_tbls from encode matrix a
+ ec_init_tables(k, m - k, &encode_matrix[k * k], g_tbls);
+ // Perform matrix dot_prod for EC encoding
+ // using g_tbls from encode matrix a
+ ec_encode_data(size, k, m - k, g_tbls, ubuffs, &ubuffs[k]);
+
+ // Random errors
+ memset(src_in_err, 0, TEST_SOURCES);
+ gen_err_list(src_err_list, src_in_err, &nerrs, &nsrcerrs, k, m);
+
+ // Generate decode matrix
+ re = gf_gen_decode_matrix(encode_matrix, decode_matrix,
+ invert_matrix, decode_index, src_err_list,
+ src_in_err, nerrs, nsrcerrs, k, m);
+ if (re != 0) {
+ printf("Fail to gf_gen_decode_matrix\n");
+ return -1;
+ }
+ // Pack recovery array as list of valid sources
+ // Its order must be the same as the order
+ // to generate matrix b in gf_gen_decode_matrix
+ for (i = 0; i < k; i++) {
+ recov[i] = ubuffs[decode_index[i]];
+ }
+
+ // Recover data
+ ec_init_tables(k, nerrs, decode_matrix, g_tbls);
+ ec_encode_data(size, k, nerrs, g_tbls, recov, &temp_ubuffs[k]);
+
+ for (i = 0; i < nerrs; i++) {
+
+ if (0 != memcmp(temp_ubuffs[k + i], ubuffs[src_err_list[i]], size)) {
+ printf("Fail error recovery (%d, %d, %d) - ", m, k, nerrs);
+ printf(" - erase list = ");
+ for (j = 0; j < nerrs; j++)
+ printf(" %d", src_err_list[j]);
+ printf(" - Index = ");
+ for (p = 0; p < k; p++)
+ printf(" %d", decode_index[p]);
+ printf("\nencode_matrix:\n");
+ dump_u8xu8((unsigned char *)encode_matrix, m, k);
+ printf("inv b:\n");
+ dump_u8xu8((unsigned char *)invert_matrix, k, k);
+ printf("\ndecode_matrix:\n");
+ dump_u8xu8((unsigned char *)decode_matrix, m, k);
+ printf("orig data:\n");
+ dump_matrix(ubuffs, m, 25);
+ printf("orig :");
+ dump(ubuffs[src_err_list[i]], 25);
+ printf("recov %d:", src_err_list[i]);
+ dump(temp_ubuffs[k + i], 25);
+ return -1;
+ }
+ }
+
+ // Confirm that padding around dests is unchanged
+ memset(temp_buffs[0], 0, PTR_ALIGN_CHK_B); // Make reference zero buff
+
+ for (i = 0; i < m; i++) {
+
+ offset = ubuffs[i] - buffs[i];
+
+ if (memcmp(buffs[i], temp_buffs[0], offset)) {
+ printf("Fail rand ualign encode pad start\n");
+ return -1;
+ }
+ if (memcmp
+ (buffs[i] + offset + size, temp_buffs[0],
+ PTR_ALIGN_CHK_B - offset)) {
+ printf("Fail rand ualign encode pad end\n");
+ return -1;
+ }
+ }
+
+ for (i = 0; i < nerrs; i++) {
+
+ offset = temp_ubuffs[k + i] - temp_buffs[k + i];
+ if (memcmp(temp_buffs[k + i], temp_buffs[0], offset)) {
+ printf("Fail rand ualign decode pad start\n");
+ return -1;
+ }
+ if (memcmp
+ (temp_buffs[k + i] + offset + size, temp_buffs[0],
+ PTR_ALIGN_CHK_B - offset)) {
+ printf("Fail rand ualign decode pad end\n");
+ return -1;
+ }
+ }
+
+ putchar('.');
+ }
+
+ // Test size alignment
+
+ align = (LEN_ALIGN_CHK_B != 0) ? 13 : 16;
+
+ for (size = TEST_LEN; size > 0; size -= align) {
+ while ((m = (rand() % MMAX)) < 2) ;
+ while ((k = (rand() % KMAX)) >= m || k < 1) ;
+
+ if (m > MMAX || k > KMAX)
+ continue;
+
+ for (i = 0; i < k; i++)
+ for (j = 0; j < size; j++)
+ buffs[i][j] = rand();
+
+ // The matrix generated by gf_gen_cauchy1_matrix
+ // is always invertable.
+ gf_gen_cauchy1_matrix(encode_matrix, m, k);
+
+ // Make parity vects
+ // Generate g_tbls from encode matrix a
+ ec_init_tables(k, m - k, &encode_matrix[k * k], g_tbls);
+ // Perform matrix dot_prod for EC encoding
+ // using g_tbls from encode matrix a
+ ec_encode_data(size, k, m - k, g_tbls, buffs, &buffs[k]);
+
+ // Random errors
+ memset(src_in_err, 0, TEST_SOURCES);
+ gen_err_list(src_err_list, src_in_err, &nerrs, &nsrcerrs, k, m);
+ // Generate decode matrix
+ re = gf_gen_decode_matrix(encode_matrix, decode_matrix,
+ invert_matrix, decode_index, src_err_list,
+ src_in_err, nerrs, nsrcerrs, k, m);
+ if (re != 0) {
+ printf("Fail to gf_gen_decode_matrix\n");
+ return -1;
+ }
+ // Pack recovery array as list of valid sources
+ // Its order must be the same as the order
+ // to generate matrix b in gf_gen_decode_matrix
+ for (i = 0; i < k; i++) {
+ recov[i] = buffs[decode_index[i]];
+ }
+
+ // Recover data
+ ec_init_tables(k, nerrs, decode_matrix, g_tbls);
+ ec_encode_data(size, k, nerrs, g_tbls, recov, &temp_buffs[k]);
+
+ for (i = 0; i < nerrs; i++) {
+
+ if (0 != memcmp(temp_buffs[k + i], buffs[src_err_list[i]], size)) {
+ printf("Fail error recovery (%d, %d, %d) - ", m, k, nerrs);
+ printf(" - erase list = ");
+ for (j = 0; j < nerrs; j++)
+ printf(" %d", src_err_list[j]);
+ printf(" - Index = ");
+ for (p = 0; p < k; p++)
+ printf(" %d", decode_index[p]);
+ printf("\nencode_matrix:\n");
+ dump_u8xu8((unsigned char *)encode_matrix, m, k);
+ printf("inv b:\n");
+ dump_u8xu8((unsigned char *)invert_matrix, k, k);
+ printf("\ndecode_matrix:\n");
+ dump_u8xu8((unsigned char *)decode_matrix, m, k);
+ printf("orig data:\n");
+ dump_matrix(buffs, m, 25);
+ printf("orig :");
+ dump(buffs[src_err_list[i]], 25);
+ printf("recov %d:", src_err_list[i]);
+ dump(temp_buffs[k + i], 25);
+ return -1;
+ }
+ }
+ }
+
+ printf("done EC tests: Pass\n");
+ return 0;
+}
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