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/*****************************************************************************\
* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
* Copyright (C) 2007 The Regents of the University of California.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
* UCRL-CODE-235197
*
* This file is part of the SPL, Solaris Porting Layer.
* For details, see <http://zfsonlinux.org/>.
*
* The SPL is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* The SPL is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with the SPL. If not, see <http://www.gnu.org/licenses/>.
*****************************************************************************
* Solaris Porting LAyer Tests (SPLAT) Zlib Compression Tests.
\*****************************************************************************/
#include <sys/zmod.h>
#include <sys/random.h>
#include <sys/kmem.h>
#include <sys/vmem.h>
#include "splat-internal.h"
#define SPLAT_ZLIB_NAME "zlib"
#define SPLAT_ZLIB_DESC "Zlib Compression Tests"
#define SPLAT_ZLIB_TEST1_ID 0x0f01
#define SPLAT_ZLIB_TEST1_NAME "compress/uncompress"
#define SPLAT_ZLIB_TEST1_DESC "Compress/Uncompress Test"
#define BUFFER_SIZE (128 * 1024)
static int
splat_zlib_test1_check(struct file *file, void *src, void *dst, void *chk,
int level)
{
size_t dst_len = BUFFER_SIZE;
size_t chk_len = BUFFER_SIZE;
int rc;
memset(dst, 0, BUFFER_SIZE);
memset(chk, 0, BUFFER_SIZE);
rc = z_compress_level(dst, &dst_len, src, BUFFER_SIZE, level);
if (rc != Z_OK) {
splat_vprint(file, SPLAT_ZLIB_TEST1_NAME,
"Failed level %d z_compress_level(), %d\n", level, rc);
return -EINVAL;
}
rc = z_uncompress(chk, &chk_len, dst, dst_len);
if (rc != Z_OK) {
splat_vprint(file, SPLAT_ZLIB_TEST1_NAME,
"Failed level %d z_uncompress(), %d\n", level, rc);
return -EINVAL;
}
rc = memcmp(src, chk, BUFFER_SIZE);
if (rc) {
splat_vprint(file, SPLAT_ZLIB_TEST1_NAME,
"Failed level %d memcmp()), %d\n", level, rc);
return -EINVAL;
}
splat_vprint(file, SPLAT_ZLIB_TEST1_NAME,
"Passed level %d, compressed %d bytes to %d bytes\n",
level, BUFFER_SIZE, (int)dst_len);
return 0;
}
/*
* Compress a buffer, uncompress the newly compressed buffer, then
* compare it to the original. Do this for all 9 compression levels.
*/
static int
splat_zlib_test1(struct file *file, void *arg)
{
void *src = NULL, *dst = NULL, *chk = NULL;
int i, rc, level;
src = vmalloc(BUFFER_SIZE);
if (src == NULL) {
rc = -ENOMEM;
goto out;
}
dst = vmalloc(BUFFER_SIZE);
if (dst == NULL) {
rc = -ENOMEM;
goto out;
}
chk = vmalloc(BUFFER_SIZE);
if (chk == NULL) {
rc = -ENOMEM;
goto out;
}
/* Source buffer is a repeating 1024 byte random pattern. */
random_get_pseudo_bytes(src, sizeof(uint8_t) * 1024);
for (i = 1; i < 128; i++)
memcpy(src + (i * 1024), src, 1024);
for (level = 1; level <= 9; level++)
if ((rc = splat_zlib_test1_check(file, src, dst, chk, level)))
break;
out:
if (src)
vfree(src);
if (dst)
vfree(dst);
if (chk)
vfree(chk);
return rc;
}
splat_subsystem_t *
splat_zlib_init(void)
{
splat_subsystem_t *sub;
sub = kmalloc(sizeof(*sub), GFP_KERNEL);
if (sub == NULL)
return NULL;
memset(sub, 0, sizeof(*sub));
strncpy(sub->desc.name, SPLAT_ZLIB_NAME, SPLAT_NAME_SIZE);
strncpy(sub->desc.desc, SPLAT_ZLIB_DESC, SPLAT_DESC_SIZE);
INIT_LIST_HEAD(&sub->subsystem_list);
INIT_LIST_HEAD(&sub->test_list);
spin_lock_init(&sub->test_lock);
sub->desc.id = SPLAT_SUBSYSTEM_ZLIB;
splat_test_init(sub, SPLAT_ZLIB_TEST1_NAME, SPLAT_ZLIB_TEST1_DESC,
SPLAT_ZLIB_TEST1_ID, splat_zlib_test1);
return sub;
}
void
splat_zlib_fini(splat_subsystem_t *sub)
{
ASSERT(sub);
splat_test_fini(sub, SPLAT_ZLIB_TEST1_ID);
kfree(sub);
}
int
splat_zlib_id(void) {
return SPLAT_SUBSYSTEM_ZLIB;
}
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