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@@ -0,0 +1,55 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+
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+#include <linux/xxhash.h>
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+#include <linux/unaligned/access_ok.h>
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+#include <linux/types.h>
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+#include <u-boot/sha256.h>
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+#include <u-boot/crc.h>
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+
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+static u32 btrfs_crc32c_table[256];
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+
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+void btrfs_hash_init(void)
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+{
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+ static int inited = 0;
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+
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+ if (!inited) {
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+ crc32c_init(btrfs_crc32c_table, 0x82F63B78);
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+ inited = 1;
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+ }
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+}
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+
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+int hash_sha256(const u8 *buf, size_t length, u8 *out)
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+{
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+ sha256_context ctx;
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+
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+ sha256_starts(&ctx);
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+ sha256_update(&ctx, buf, length);
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+ sha256_finish(&ctx, out);
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+
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+ return 0;
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+}
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+
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+int hash_xxhash(const u8 *buf, size_t length, u8 *out)
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+{
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+ u64 hash;
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+
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+ hash = xxh64(buf, length, 0);
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+ put_unaligned_le64(hash, out);
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+
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+ return 0;
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+}
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+
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+int hash_crc32c(const u8 *buf, size_t length, u8 *out)
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+{
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+ u32 crc;
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+
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+ crc = crc32c_cal((u32)~0, (char *)buf, length, btrfs_crc32c_table);
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+ put_unaligned_le32(~crc, out);
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+
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+ return 0;
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+}
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+
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+u32 crc32c(u32 seed, const void * data, size_t len)
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+{
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+ return crc32c_cal(seed, data, len, btrfs_crc32c_table);
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+}
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