Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 77 insertions, 0 deletions

diff --git a/src/spdk/lib/util/util_internal.h b/src/spdk/lib/util/util_internal.h
new file mode 100644
index 000000000..655ef513d
--- /dev/null
+++ b/src/spdk/lib/util/util_internal.h
@@ -0,0 +1,77 @@
+/*-
+ *   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.
+ */
+
+#ifndef SPDK_UTIL_INTERNAL_H
+#define SPDK_UTIL_INTERNAL_H
+
+#include "spdk/stdinc.h"
+
+/**
+ * IEEE CRC-32 polynomial (bit reflected)
+ */
+#define SPDK_CRC32_POLYNOMIAL_REFLECT 0xedb88320UL
+
+/**
+ * CRC-32C (Castagnoli) polynomial (bit reflected)
+ */
+#define SPDK_CRC32C_POLYNOMIAL_REFLECT 0x82f63b78UL
+
+struct spdk_crc32_table {
+	uint32_t table[256];
+};
+
+/**
+ * Initialize a CRC32 lookup table for a given polynomial.
+ *
+ * \param table Table to fill with precalculated CRC-32 data.
+ * \param polynomial_reflect Bit-reflected CRC-32 polynomial.
+ */
+void crc32_table_init(struct spdk_crc32_table *table,
+		      uint32_t polynomial_reflect);
+
+
+/**
+ * Calculate a partial CRC-32 checksum.
+ *
+ * \param table CRC-32 table initialized with crc32_table_init().
+ * \param buf Data buffer to checksum.
+ * \param len Length of buf in bytes.
+ * \param crc Previous CRC-32 value.
+ * \return Updated CRC-32 value.
+ */
+uint32_t crc32_update(const struct spdk_crc32_table *table,
+		      const void *buf, size_t len,
+		      uint32_t crc);
+
+#endif /* SPDK_UTIL_INTERNAL_H */