--- /dev/null
+/* GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see http://www.gnu.org/licenses
+ *
+ * Please visit http://www.xyratex.com/contact if you need additional
+ * information or have any questions.
+ *
+ * GPL HEADER END
+ */
+
+/*
+ * Copyright 2012 Xyratex Technology Limited
+ *
+ * Copyright (c) 2012, Intel Corporation.
+ */
+
+#include <linux/crypto.h>
+#include <linux/scatterlist.h>
+#include "../../../include/linux/libcfs/libcfs.h"
+#include "linux-crypto.h"
+/**
+ * Array of hash algorithm speed in MByte per second
+ */
+static int cfs_crypto_hash_speeds[CFS_HASH_ALG_MAX];
+
+
+
+static int cfs_crypto_hash_alloc(unsigned char alg_id,
+ const struct cfs_crypto_hash_type **type,
+ struct hash_desc *desc, unsigned char *key,
+ unsigned int key_len)
+{
+ int err = 0;
+
+ *type = cfs_crypto_hash_type(alg_id);
+
+ if (*type == NULL) {
+ CWARN("Unsupported hash algorithm id = %d, max id is %d\n",
+ alg_id, CFS_HASH_ALG_MAX);
+ return -EINVAL;
+ }
+ desc->tfm = crypto_alloc_hash((*type)->cht_name, 0, 0);
+
+ if (desc->tfm == NULL)
+ return -EINVAL;
+
+ if (IS_ERR(desc->tfm)) {
+ CDEBUG(D_INFO, "Failed to alloc crypto hash %s\n",
+ (*type)->cht_name);
+ return PTR_ERR(desc->tfm);
+ }
+
+ desc->flags = 0;
+
+ /** Shash have different logic for initialization then digest
+ * shash: crypto_hash_setkey, crypto_hash_init
+ * digest: crypto_digest_init, crypto_digest_setkey
+ * Skip this function for digest, because we use shash logic at
+ * cfs_crypto_hash_alloc.
+ */
+ if (key != NULL) {
+ err = crypto_hash_setkey(desc->tfm, key, key_len);
+ } else if ((*type)->cht_key != 0) {
+ err = crypto_hash_setkey(desc->tfm,
+ (unsigned char *)&((*type)->cht_key),
+ (*type)->cht_size);
+ }
+
+ if (err != 0) {
+ crypto_free_hash(desc->tfm);
+ return err;
+ }
+
+ CDEBUG(D_INFO, "Using crypto hash: %s (%s) speed %d MB/s\n",
+ (crypto_hash_tfm(desc->tfm))->__crt_alg->cra_name,
+ (crypto_hash_tfm(desc->tfm))->__crt_alg->cra_driver_name,
+ cfs_crypto_hash_speeds[alg_id]);
+
+ return crypto_hash_init(desc);
+}
+
+int cfs_crypto_hash_digest(unsigned char alg_id,
+ const void *buf, unsigned int buf_len,
+ unsigned char *key, unsigned int key_len,
+ unsigned char *hash, unsigned int *hash_len)
+{
+ struct scatterlist sl;
+ struct hash_desc hdesc;
+ int err;
+ const struct cfs_crypto_hash_type *type;
+
+ if (buf == NULL || buf_len == 0 || hash_len == NULL)
+ return -EINVAL;
+
+ err = cfs_crypto_hash_alloc(alg_id, &type, &hdesc, key, key_len);
+ if (err != 0)
+ return err;
+
+ if (hash == NULL || *hash_len < type->cht_size) {
+ *hash_len = type->cht_size;
+ crypto_free_hash(hdesc.tfm);
+ return -ENOSPC;
+ }
+ sg_init_one(&sl, (void *)buf, buf_len);
+
+ hdesc.flags = 0;
+ err = crypto_hash_digest(&hdesc, &sl, sl.length, hash);
+ crypto_free_hash(hdesc.tfm);
+
+ return err;
+}
+EXPORT_SYMBOL(cfs_crypto_hash_digest);
+
+struct cfs_crypto_hash_desc *
+ cfs_crypto_hash_init(unsigned char alg_id,
+ unsigned char *key, unsigned int key_len)
+{
+
+ struct hash_desc *hdesc;
+ int err;
+ const struct cfs_crypto_hash_type *type;
+
+ hdesc = kmalloc(sizeof(*hdesc), 0);
+ if (hdesc == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ err = cfs_crypto_hash_alloc(alg_id, &type, hdesc, key, key_len);
+
+ if (err) {
+ kfree(hdesc);
+ return ERR_PTR(err);
+ }
+ return (struct cfs_crypto_hash_desc *)hdesc;
+}
+EXPORT_SYMBOL(cfs_crypto_hash_init);
+
+int cfs_crypto_hash_update_page(struct cfs_crypto_hash_desc *hdesc,
+ struct page *page, unsigned int offset,
+ unsigned int len)
+{
+ struct scatterlist sl;
+
+ sg_init_table(&sl, 1);
+ sg_set_page(&sl, page, len, offset & ~CFS_PAGE_MASK);
+
+ return crypto_hash_update((struct hash_desc *)hdesc, &sl, sl.length);
+}
+EXPORT_SYMBOL(cfs_crypto_hash_update_page);
+
+int cfs_crypto_hash_update(struct cfs_crypto_hash_desc *hdesc,
+ const void *buf, unsigned int buf_len)
+{
+ struct scatterlist sl;
+
+ sg_init_one(&sl, (void *)buf, buf_len);
+
+ return crypto_hash_update((struct hash_desc *)hdesc, &sl, sl.length);
+}
+EXPORT_SYMBOL(cfs_crypto_hash_update);
+
+/* If hash_len pointer is NULL - destroy descriptor. */
+int cfs_crypto_hash_final(struct cfs_crypto_hash_desc *hdesc,
+ unsigned char *hash, unsigned int *hash_len)
+{
+ int err;
+ int size = crypto_hash_digestsize(((struct hash_desc *)hdesc)->tfm);
+
+ if (hash_len == NULL) {
+ crypto_free_hash(((struct hash_desc *)hdesc)->tfm);
+ kfree(hdesc);
+ return 0;
+ }
+ if (hash == NULL || *hash_len < size) {
+ *hash_len = size;
+ return -ENOSPC;
+ }
+ err = crypto_hash_final((struct hash_desc *) hdesc, hash);
+
+ if (err < 0) {
+ /* May be caller can fix error */
+ return err;
+ }
+ crypto_free_hash(((struct hash_desc *)hdesc)->tfm);
+ kfree(hdesc);
+ return err;
+}
+EXPORT_SYMBOL(cfs_crypto_hash_final);
+
+static void cfs_crypto_performance_test(unsigned char alg_id,
+ const unsigned char *buf,
+ unsigned int buf_len)
+{
+ unsigned long start, end;
+ int bcount, err = 0;
+ int sec = 1; /* do test only 1 sec */
+ unsigned char hash[64];
+ unsigned int hash_len = 64;
+
+ for (start = jiffies, end = start + sec * HZ, bcount = 0;
+ time_before(jiffies, end); bcount++) {
+ err = cfs_crypto_hash_digest(alg_id, buf, buf_len, NULL, 0,
+ hash, &hash_len);
+ if (err)
+ break;
+
+ }
+ end = jiffies;
+
+ if (err) {
+ cfs_crypto_hash_speeds[alg_id] = -1;
+ CDEBUG(D_INFO, "Crypto hash algorithm %s, err = %d\n",
+ cfs_crypto_hash_name(alg_id), err);
+ } else {
+ unsigned long tmp;
+ tmp = ((bcount * buf_len / jiffies_to_msecs(end - start)) *
+ 1000) / (1024 * 1024);
+ cfs_crypto_hash_speeds[alg_id] = (int)tmp;
+ }
+ CDEBUG(D_INFO, "Crypto hash algorithm %s speed = %d MB/s\n",
+ cfs_crypto_hash_name(alg_id), cfs_crypto_hash_speeds[alg_id]);
+}
+
+int cfs_crypto_hash_speed(unsigned char hash_alg)
+{
+ if (hash_alg < CFS_HASH_ALG_MAX)
+ return cfs_crypto_hash_speeds[hash_alg];
+ else
+ return -1;
+}
+EXPORT_SYMBOL(cfs_crypto_hash_speed);
+
+/**
+ * Do performance test for all hash algorithms.
+ */
+static int cfs_crypto_test_hashes(void)
+{
+ unsigned char i;
+ unsigned char *data;
+ unsigned int j;
+ /* Data block size for testing hash. Maximum
+ * kmalloc size for 2.6.18 kernel is 128K */
+ unsigned int data_len = 1 * 128 * 1024;
+
+ data = kmalloc(data_len, 0);
+ if (data == NULL) {
+ CERROR("Failed to allocate mem\n");
+ return -ENOMEM;
+ }
+
+ for (j = 0; j < data_len; j++)
+ data[j] = j & 0xff;
+
+ for (i = 0; i < CFS_HASH_ALG_MAX; i++)
+ cfs_crypto_performance_test(i, data, data_len);
+
+ kfree(data);
+ return 0;
+}
+
+static int adler32;
+
+int cfs_crypto_register(void)
+{
+ request_module("crc32c");
+
+ adler32 = cfs_crypto_adler32_register();
+
+ /* check all algorithms and do performance test */
+ cfs_crypto_test_hashes();
+ return 0;
+}
+void cfs_crypto_unregister(void)
+{
+ if (adler32 == 0)
+ cfs_crypto_adler32_unregister();
+
+ return;
+}
Code Review / kvmfornfv.git / blobdiff