New upstream release.

1 files changed, 0 insertions, 172 deletions

diff --git a/raid56.c b/raid56.c
deleted file mode 100644
index 8c79c456..00000000
--- a/raid56.c
+++ /dev/null
@@ -1,172 +0,0 @@
-/* -*- linux-c -*- ------------------------------------------------------- *
- *
- *   Copyright 2002-2004 H. Peter Anvin - All Rights Reserved
- *
- *   This program 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, Inc., 53 Temple Place Ste 330,
- *   Boston MA 02111-1307, USA; either version 2 of the License, or
- *   (at your option) any later version; incorporated herein by reference.
- *
- * ----------------------------------------------------------------------- */
-
-/*
- * Added helpers for unaligned native int access
- */
-
-/*
- * raid6int1.c
- *
- * 1-way unrolled portable integer math RAID-6 instruction set
- *
- * This file was postprocessed using unroll.pl and then ported to userspace
- */
-#include <stdint.h>
-#include <unistd.h>
-#include "kerncompat.h"
-#include "ctree.h"
-#include "disk-io.h"
-#include "volumes.h"
-#include "utils.h"
-
-/*
- * This is the C data type to use
- */
-
-/* Change this from BITS_PER_LONG if there is something better... */
-#if BITS_PER_LONG == 64
-# define NBYTES(x) ((x) * 0x0101010101010101UL)
-# define NSIZE  8
-# define NSHIFT 3
-typedef uint64_t unative_t;
-#define put_unaligned_native(val,p)	put_unaligned_64((val),(p))
-#define get_unaligned_native(p)		get_unaligned_64((p))
-#else
-# define NBYTES(x) ((x) * 0x01010101U)
-# define NSIZE  4
-# define NSHIFT 2
-typedef uint32_t unative_t;
-#define put_unaligned_native(val,p)	put_unaligned_32((val),(p))
-#define get_unaligned_native(p)		get_unaligned_32((p))
-#endif
-
-/*
- * These sub-operations are separate inlines since they can sometimes be
- * specially optimized using architecture-specific hacks.
- */
-
-/*
- * The SHLBYTE() operation shifts each byte left by 1, *not*
- * rolling over into the next byte
- */
-static inline __attribute_const__ unative_t SHLBYTE(unative_t v)
-{
-	unative_t vv;
-
-	vv = (v << 1) & NBYTES(0xfe);
-	return vv;
-}
-
-/*
- * The MASK() operation returns 0xFF in any byte for which the high
- * bit is 1, 0x00 for any byte for which the high bit is 0.
- */
-static inline __attribute_const__ unative_t MASK(unative_t v)
-{
-	unative_t vv;
-
-	vv = v & NBYTES(0x80);
-	vv = (vv << 1) - (vv >> 7); /* Overflow on the top bit is OK */
-	return vv;
-}
-
-
-void raid6_gen_syndrome(int disks, size_t bytes, void **ptrs)
-{
-	uint8_t **dptr = (uint8_t **)ptrs;
-	uint8_t *p, *q;
-	int d, z, z0;
-
-	unative_t wd0, wq0, wp0, w10, w20;
-
-	z0 = disks - 3;		/* Highest data disk */
-	p = dptr[z0+1];		/* XOR parity */
-	q = dptr[z0+2];		/* RS syndrome */
-
-	for ( d = 0 ; d < bytes ; d += NSIZE*1 ) {
-		wq0 = wp0 = get_unaligned_native(&dptr[z0][d+0*NSIZE]);
-		for ( z = z0-1 ; z >= 0 ; z-- ) {
-			wd0 = get_unaligned_native(&dptr[z][d+0*NSIZE]);
-			wp0 ^= wd0;
-			w20 = MASK(wq0);
-			w10 = SHLBYTE(wq0);
-			w20 &= NBYTES(0x1d);
-			w10 ^= w20;
-			wq0 = w10 ^ wd0;
-		}
-		put_unaligned_native(wp0, &p[d+NSIZE*0]);
-		put_unaligned_native(wq0, &q[d+NSIZE*0]);
-	}
-}
-
-static void xor_range(char *dst, const char*src, size_t size)
-{
-	/* Move to DWORD aligned */
-	while (size && ((unsigned long)dst & sizeof(unsigned long))) {
-		*dst++ ^= *src++;
-		size--;
-	}
-
-	/* DWORD aligned part */
-	while (size >= sizeof(unsigned long)) {
-		*(unsigned long *)dst ^= *(unsigned long *)src;
-		src += sizeof(unsigned long);
-		dst += sizeof(unsigned long);
-		size -= sizeof(unsigned long);
-	}
-	/* Remaining */
-	while (size) {
-		*dst++ ^= *src++;
-		size--;
-	}
-}
-
-/*
- * Generate desired data/parity stripe for RAID5
- *
- * @nr_devs:	Total number of devices, including parity
- * @stripe_len:	Stripe length
- * @data:	Data, with special layout:
- * 		data[0]:	 Data stripe 0
- * 		data[nr_devs-2]: Last data stripe
- * 		data[nr_devs-1]: RAID5 parity
- * @dest:	To generate which data. should follow above data layout
- */
-int raid5_gen_result(int nr_devs, size_t stripe_len, int dest, void **data)
-{
-	int i;
-	char *buf = data[dest];
-
-	/* Validation check */
-	if (stripe_len <= 0 || stripe_len != BTRFS_STRIPE_LEN) {
-		error("invalid parameter for %s", __func__);
-		return -EINVAL;
-	}
-
-	if (dest >= nr_devs || nr_devs < 2) {
-		error("invalid parameter for %s", __func__);
-		return -EINVAL;
-	}
-	/* Shortcut for 2 devs RAID5, which is just RAID1 */
-	if (nr_devs == 2) {
-		memcpy(data[dest], data[1 - dest], stripe_len);
-		return 0;
-	}
-	memset(buf, 0, stripe_len);
-	for (i = 0; i < nr_devs; i++) {
-		if (i == dest)
-			continue;
-		xor_range(buf, data[i], stripe_len);
-	}
-	return 0;
-}