740e5dc50b
Factor out the common PDU header and data digest calculations into helper functions in iscsi.c. This eliminates the need for the crc32c.c iSCSI-specific padding functions spdk_fixup_crc32c() and spdk_crc32c(), so remove them. Change-Id: I8cbf269c43177d7483f1df2e7ce9ce83776e7169 Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com> Reviewed-on: https://review.gerrithub.io/369312 Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com>
96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/*-
|
|
* BSD LICENSE
|
|
*
|
|
* Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
|
|
* Copyright (c) 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 "spdk/stdinc.h"
|
|
|
|
#include "iscsi/iscsi.h"
|
|
#include "iscsi/crc32c.h"
|
|
|
|
#ifndef USE_ISAL
|
|
#define SPDK_USE_CRC32C_TABLE
|
|
#endif
|
|
|
|
#ifdef SPDK_USE_CRC32C_TABLE
|
|
static uint32_t spdk_crc32c_table[256];
|
|
|
|
__attribute__((constructor)) static void
|
|
spdk_init_crc32c(void)
|
|
{
|
|
int i, j;
|
|
uint32_t val;
|
|
|
|
for (i = 0; i < 256; i++) {
|
|
val = i;
|
|
for (j = 0; j < 8; j++) {
|
|
if (val & 1) {
|
|
val = (val >> 1) ^ SPDK_CRC32C_POLYNOMIAL_REFLECT;
|
|
} else {
|
|
val = (val >> 1);
|
|
}
|
|
}
|
|
spdk_crc32c_table[i] = val;
|
|
}
|
|
}
|
|
#endif /* SPDK_USE_CRC32C_TABLE */
|
|
|
|
|
|
#ifndef USE_ISAL
|
|
uint32_t
|
|
spdk_update_crc32c(const uint8_t *buf, size_t len, uint32_t crc)
|
|
{
|
|
size_t s;
|
|
#ifndef SPDK_USE_CRC32C_TABLE
|
|
int i;
|
|
uint32_t val;
|
|
#endif /* SPDK_USE_CRC32C_TABLE */
|
|
|
|
for (s = 0; s < len; s++) {
|
|
#ifdef SPDK_USE_CRC32C_TABLE
|
|
crc = (crc >> 8) ^ spdk_crc32c_table[(crc ^ buf[s]) & 0xff];
|
|
#else
|
|
val = buf[s];
|
|
for (i = 0; i < 8; i++) {
|
|
if ((crc ^ val) & 1) {
|
|
crc = (crc >> 1) ^ SPDK_CRC32C_POLYNOMIAL_REFLECT;
|
|
} else {
|
|
crc = (crc >> 1);
|
|
}
|
|
val = val >> 1;
|
|
}
|
|
#endif /* SPDK_USE_CRC32C_TABLE */
|
|
}
|
|
return crc;
|
|
}
|
|
#endif /* USE_ISAL */
|