libfrog: move crc32c code out of libxfs

crc32c code isn't part of the kernel libxfs, nor should it be part of
xfsprogs libxfs.  Put it in libfrog since it's runtime support anyway.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>

4 files changed, 1024 insertions, 1 deletions

diff --git a/libfrog/Makefile b/libfrog/Makefile
index d5a82434f5..707666e1d7 100644
--- a/libfrog/Makefile
+++ b/libfrog/Makefile
@@ -13,6 +13,7 @@ LT_AGE = 0
 CFILES = \
 avl64.c \
 convert.c \
+crc32.c \
 fsgeom.c \
 list_sort.c \
 paths.c \
@@ -23,6 +24,12 @@ topology.c \
 util.c \
 workqueue.c
 
+HFILES = \
+crc32defs.h \
+crc32table.h
+
+LSRCFILES += gen_crc32table.c
+
 CFILES += $(PKG_PLATFORM).c
 PCFILES = darwin.c freebsd.c irix.c linux.c
 LSRCFILES = $(shell echo $(PCFILES) | sed -e "s/$(PKG_PLATFORM).c//g")
@@ -35,7 +42,25 @@ ifeq ($(HAVE_GETMNTINFO),yes)
 LCFLAGS += -DHAVE_GETMNTINFO
 endif
 
-default: ltdepend $(LTLIBRARY)
+LDIRT = gen_crc32table crc32table.h crc32selftest
+
+default: crc32selftest ltdepend $(LTLIBRARY)
+
+crc32table.h: gen_crc32table.c crc32defs.h
+	@echo "    [CC]     gen_crc32table"
+	$(Q) $(BUILD_CC) $(BUILD_CFLAGS) -o gen_crc32table $<
+	@echo "    [GENERATE] $@"
+	$(Q) ./gen_crc32table > crc32table.h
+
+# The selftest binary will return an error if it fails. This is made a
+# dependency of the build process so that we refuse to build the tools on broken
+# systems/architectures. Hence we make sure that xfsprogs will never use a
+# busted CRC calculation at build time and hence avoid putting bad CRCs down on
+# disk.
+crc32selftest: gen_crc32table.c crc32table.h crc32.c crc32defs.h
+	@echo "    [TEST]    CRC32"
+	$(Q) $(BUILD_CC) $(BUILD_CFLAGS) -D CRC32_SELFTEST=1 crc32.c -o $@
+	$(Q) ./$@
 
 include $(BUILDRULES)
 
diff --git a/libfrog/crc32.c b/libfrog/crc32.c
new file mode 100644
index 0000000000..1d52f683a1
--- /dev/null
+++ b/libfrog/crc32.c
@@ -0,0 +1,867 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Aug 8, 2011 Bob Pearson with help from Joakim Tjernlund and George Spelvin
+ * cleaned up code to current version of sparse and added the slicing-by-8
+ * algorithm to the closely similar existing slicing-by-4 algorithm.
+ * Oct 15, 2000 Matt Domsch <Matt_Domsch@dell.com>
+ * Nicer crc32 functions/docs submitted by linux@horizon.com.  Thanks!
+ * Code was from the public domain, copyright abandoned.  Code was
+ * subsequently included in the kernel, thus was re-licensed under the
+ * GNU GPL v2.
+ * Oct 12, 2000 Matt Domsch <Matt_Domsch@dell.com>
+ * Same crc32 function was used in 5 other places in the kernel.
+ * I made one version, and deleted the others.
+ * There are various incantations of crc32().  Some use a seed of 0 or ~0.
+ * Some xor at the end with ~0.  The generic crc32() function takes
+ * seed as an argument, and doesn't xor at the end.  Then individual
+ * users can do whatever they need.
+ *   drivers/net/smc9194.c uses seed ~0, doesn't xor with ~0.
+ *   fs/jffs2 uses seed 0, doesn't xor with ~0.
+ *   fs/partitions/efi.c uses seed ~0, xor's with ~0.
+ */
+
+/* see: Documentation/crc32.txt for a description of algorithms */
+
+/*
+ * lifted from the 3.8-rc2 kernel source for xfsprogs. Killed CONFIG_X86
+ * specific bits for just the generic algorithm. Also removed the big endian
+ * version of the algorithm as XFS only uses the little endian CRC version to
+ * match the hardware acceleration available on Intel CPUs.
+ */
+
+#include "platform_defs.h"
+#include "xfs.h"
+#include "xfs_arch.h"
+#include "crc32defs.h"
+
+/* types specifc to this file */
+typedef __u8	u8;
+typedef __u16	u16;
+typedef __u32	u32;
+typedef __u32	u64;
+#define __pure
+
+#if CRC_LE_BITS > 8
+# define tole(x) ((__force u32) __constant_cpu_to_le32(x))
+#else
+# define tole(x) (x)
+#endif
+
+#include "crc32table.h"
+
+#if CRC_LE_BITS > 8
+
+/* implements slicing-by-4 or slicing-by-8 algorithm */
+static inline u32
+crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256])
+{
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#  define DO_CRC(x) crc = t0[(crc ^ (x)) & 255] ^ (crc >> 8)
+#  define DO_CRC4 (t3[(q) & 255] ^ t2[(q >> 8) & 255] ^ \
+		   t1[(q >> 16) & 255] ^ t0[(q >> 24) & 255])
+#  define DO_CRC8 (t7[(q) & 255] ^ t6[(q >> 8) & 255] ^ \
+		   t5[(q >> 16) & 255] ^ t4[(q >> 24) & 255])
+# elif __BYTE_ORDER == __BIG_ENDIAN
+#  define DO_CRC(x) crc = t0[((crc >> 24) ^ (x)) & 255] ^ (crc << 8)
+#  define DO_CRC4 (t0[(q) & 255] ^ t1[(q >> 8) & 255] ^ \
+		   t2[(q >> 16) & 255] ^ t3[(q >> 24) & 255])
+#  define DO_CRC8 (t4[(q) & 255] ^ t5[(q >> 8) & 255] ^ \
+		   t6[(q >> 16) & 255] ^ t7[(q >> 24) & 255])
+# else
+#  error What endian are you?
+# endif
+	const u32 *b;
+	size_t    rem_len;
+	const u32 *t0=tab[0], *t1=tab[1], *t2=tab[2], *t3=tab[3];
+# if CRC_LE_BITS != 32
+	const u32 *t4 = tab[4], *t5 = tab[5], *t6 = tab[6], *t7 = tab[7];
+# endif
+	u32 q;
+
+	/* Align it */
+	if (((long)buf & 3) && len) {
+		do {
+			DO_CRC(*buf++);
+		} while ((--len) && ((long)buf)&3);
+	}
+
+# if CRC_LE_BITS == 32
+	rem_len = len & 3;
+	len = len >> 2;
+# else
+	rem_len = len & 7;
+	len = len >> 3;
+# endif
+
+	b = (const u32 *)buf;
+	for (--b; len; --len) {
+		q = crc ^ *++b; /* use pre increment for speed */
+# if CRC_LE_BITS == 32
+		crc = DO_CRC4;
+# else
+		crc = DO_CRC8;
+		q = *++b;
+		crc ^= DO_CRC4;
+# endif
+	}
+	len = rem_len;
+	/* And the last few bytes */
+	if (len) {
+		u8 *p = (u8 *)(b + 1) - 1;
+		do {
+			DO_CRC(*++p); /* use pre increment for speed */
+		} while (--len);
+	}
+	return crc;
+#undef DO_CRC
+#undef DO_CRC4
+#undef DO_CRC8
+}
+#endif
+
+/**
+ * crc32_le() - Calculate bitwise little-endian Ethernet AUTODIN II CRC32
+ * @crc: seed value for computation.  ~0 for Ethernet, sometimes 0 for
+ *	other uses, or the previous crc32 value if computing incrementally.
+ * @p: pointer to buffer over which CRC is run
+ * @len: length of buffer @p
+ */
+static inline u32 __pure crc32_le_generic(u32 crc, unsigned char const *p,
+					  size_t len, const u32 (*tab)[256],
+					  u32 polynomial)
+{
+#if CRC_LE_BITS == 1
+	int i;
+	while (len--) {
+		crc ^= *p++;
+		for (i = 0; i < 8; i++)
+			crc = (crc >> 1) ^ ((crc & 1) ? polynomial : 0);
+	}
+# elif CRC_LE_BITS == 2
+	while (len--) {
+		crc ^= *p++;
+		crc = (crc >> 2) ^ tab[0][crc & 3];
+		crc = (crc >> 2) ^ tab[0][crc & 3];
+		crc = (crc >> 2) ^ tab[0][crc & 3];
+		crc = (crc >> 2) ^ tab[0][crc & 3];
+	}
+# elif CRC_LE_BITS == 4
+	while (len--) {
+		crc ^= *p++;
+		crc = (crc >> 4) ^ tab[0][crc & 15];
+		crc = (crc >> 4) ^ tab[0][crc & 15];
+	}
+# elif CRC_LE_BITS == 8
+	/* aka Sarwate algorithm */
+	while (len--) {
+		crc ^= *p++;
+		crc = (crc >> 8) ^ tab[0][crc & 255];
+	}
+# else
+	crc = (__force u32) cpu_to_le32(crc);
+	crc = crc32_body(crc, p, len, tab);
+	crc = le32_to_cpu((__force __le32)crc);
+#endif
+	return crc;
+}
+
+#if CRC_LE_BITS == 1
+u32 __pure crc32c_le(u32 crc, unsigned char const *p, size_t len)
+{
+	return crc32_le_generic(crc, p, len, NULL, CRC32C_POLY_LE);
+}
+#else
+u32 __pure crc32c_le(u32 crc, unsigned char const *p, size_t len)
+{
+	return crc32_le_generic(crc, p, len,
+			(const u32 (*)[256])crc32ctable_le, CRC32C_POLY_LE);
+}
+#endif
+
+
+#ifdef CRC32_SELFTEST
+
+/* 4096 random bytes */
+static u8 __attribute__((__aligned__(8))) test_buf[] =
+{
+	0x5b, 0x85, 0x21, 0xcb, 0x09, 0x68, 0x7d, 0x30,
+	0xc7, 0x69, 0xd7, 0x30, 0x92, 0xde, 0x59, 0xe4,
+	0xc9, 0x6e, 0x8b, 0xdb, 0x98, 0x6b, 0xaa, 0x60,
+	0xa8, 0xb5, 0xbc, 0x6c, 0xa9, 0xb1, 0x5b, 0x2c,
+	0xea, 0xb4, 0x92, 0x6a, 0x3f, 0x79, 0x91, 0xe4,
+	0xe9, 0x70, 0x51, 0x8c, 0x7f, 0x95, 0x6f, 0x1a,
+	0x56, 0xa1, 0x5c, 0x27, 0x03, 0x67, 0x9f, 0x3a,
+	0xe2, 0x31, 0x11, 0x29, 0x6b, 0x98, 0xfc, 0xc4,
+	0x53, 0x24, 0xc5, 0x8b, 0xce, 0x47, 0xb2, 0xb9,
+	0x32, 0xcb, 0xc1, 0xd0, 0x03, 0x57, 0x4e, 0xd4,
+	0xe9, 0x3c, 0xa1, 0x63, 0xcf, 0x12, 0x0e, 0xca,
+	0xe1, 0x13, 0xd1, 0x93, 0xa6, 0x88, 0x5c, 0x61,
+	0x5b, 0xbb, 0xf0, 0x19, 0x46, 0xb4, 0xcf, 0x9e,
+	0xb6, 0x6b, 0x4c, 0x3a, 0xcf, 0x60, 0xf9, 0x7a,
+	0x8d, 0x07, 0x63, 0xdb, 0x40, 0xe9, 0x0b, 0x6f,
+	0xad, 0x97, 0xf1, 0xed, 0xd0, 0x1e, 0x26, 0xfd,
+	0xbf, 0xb7, 0xc8, 0x04, 0x94, 0xf8, 0x8b, 0x8c,
+	0xf1, 0xab, 0x7a, 0xd4, 0xdd, 0xf3, 0xe8, 0x88,
+	0xc3, 0xed, 0x17, 0x8a, 0x9b, 0x40, 0x0d, 0x53,
+	0x62, 0x12, 0x03, 0x5f, 0x1b, 0x35, 0x32, 0x1f,
+	0xb4, 0x7b, 0x93, 0x78, 0x0d, 0xdb, 0xce, 0xa4,
+	0xc0, 0x47, 0xd5, 0xbf, 0x68, 0xe8, 0x5d, 0x74,
+	0x8f, 0x8e, 0x75, 0x1c, 0xb2, 0x4f, 0x9a, 0x60,
+	0xd1, 0xbe, 0x10, 0xf4, 0x5c, 0xa1, 0x53, 0x09,
+	0xa5, 0xe0, 0x09, 0x54, 0x85, 0x5c, 0xdc, 0x07,
+	0xe7, 0x21, 0x69, 0x7b, 0x8a, 0xfd, 0x90, 0xf1,
+	0x22, 0xd0, 0xb4, 0x36, 0x28, 0xe6, 0xb8, 0x0f,
+	0x39, 0xde, 0xc8, 0xf3, 0x86, 0x60, 0x34, 0xd2,
+	0x5e, 0xdf, 0xfd, 0xcf, 0x0f, 0xa9, 0x65, 0xf0,
+	0xd5, 0x4d, 0x96, 0x40, 0xe3, 0xdf, 0x3f, 0x95,
+	0x5a, 0x39, 0x19, 0x93, 0xf4, 0x75, 0xce, 0x22,
+	0x00, 0x1c, 0x93, 0xe2, 0x03, 0x66, 0xf4, 0x93,
+	0x73, 0x86, 0x81, 0x8e, 0x29, 0x44, 0x48, 0x86,
+	0x61, 0x7c, 0x48, 0xa3, 0x43, 0xd2, 0x9c, 0x8d,
+	0xd4, 0x95, 0xdd, 0xe1, 0x22, 0x89, 0x3a, 0x40,
+	0x4c, 0x1b, 0x8a, 0x04, 0xa8, 0x09, 0x69, 0x8b,
+	0xea, 0xc6, 0x55, 0x8e, 0x57, 0xe6, 0x64, 0x35,
+	0xf0, 0xc7, 0x16, 0x9f, 0x5d, 0x5e, 0x86, 0x40,
+	0x46, 0xbb, 0xe5, 0x45, 0x88, 0xfe, 0xc9, 0x63,
+	0x15, 0xfb, 0xf5, 0xbd, 0x71, 0x61, 0xeb, 0x7b,
+	0x78, 0x70, 0x07, 0x31, 0x03, 0x9f, 0xb2, 0xc8,
+	0xa7, 0xab, 0x47, 0xfd, 0xdf, 0xa0, 0x78, 0x72,
+	0xa4, 0x2a, 0xe4, 0xb6, 0xba, 0xc0, 0x1e, 0x86,
+	0x71, 0xe6, 0x3d, 0x18, 0x37, 0x70, 0xe6, 0xff,
+	0xe0, 0xbc, 0x0b, 0x22, 0xa0, 0x1f, 0xd3, 0xed,
+	0xa2, 0x55, 0x39, 0xab, 0xa8, 0x13, 0x73, 0x7c,
+	0x3f, 0xb2, 0xd6, 0x19, 0xac, 0xff, 0x99, 0xed,
+	0xe8, 0xe6, 0xa6, 0x22, 0xe3, 0x9c, 0xf1, 0x30,
+	0xdc, 0x01, 0x0a, 0x56, 0xfa, 0xe4, 0xc9, 0x99,
+	0xdd, 0xa8, 0xd8, 0xda, 0x35, 0x51, 0x73, 0xb4,
+	0x40, 0x86, 0x85, 0xdb, 0x5c, 0xd5, 0x85, 0x80,
+	0x14, 0x9c, 0xfd, 0x98, 0xa9, 0x82, 0xc5, 0x37,
+	0xff, 0x32, 0x5d, 0xd0, 0x0b, 0xfa, 0xdc, 0x04,
+	0x5e, 0x09, 0xd2, 0xca, 0x17, 0x4b, 0x1a, 0x8e,
+	0x15, 0xe1, 0xcc, 0x4e, 0x52, 0x88, 0x35, 0xbd,
+	0x48, 0xfe, 0x15, 0xa0, 0x91, 0xfd, 0x7e, 0x6c,
+	0x0e, 0x5d, 0x79, 0x1b, 0x81, 0x79, 0xd2, 0x09,
+	0x34, 0x70, 0x3d, 0x81, 0xec, 0xf6, 0x24, 0xbb,
+	0xfb, 0xf1, 0x7b, 0xdf, 0x54, 0xea, 0x80, 0x9b,
+	0xc7, 0x99, 0x9e, 0xbd, 0x16, 0x78, 0x12, 0x53,
+	0x5e, 0x01, 0xa7, 0x4e, 0xbd, 0x67, 0xe1, 0x9b,
+	0x4c, 0x0e, 0x61, 0x45, 0x97, 0xd2, 0xf0, 0x0f,
+	0xfe, 0x15, 0x08, 0xb7, 0x11, 0x4c, 0xe7, 0xff,
+	0x81, 0x53, 0xff, 0x91, 0x25, 0x38, 0x7e, 0x40,
+	0x94, 0xe5, 0xe0, 0xad, 0xe6, 0xd9, 0x79, 0xb6,
+	0x92, 0xc9, 0xfc, 0xde, 0xc3, 0x1a, 0x23, 0xbb,
+	0xdd, 0xc8, 0x51, 0x0c, 0x3a, 0x72, 0xfa, 0x73,
+	0x6f, 0xb7, 0xee, 0x61, 0x39, 0x03, 0x01, 0x3f,
+	0x7f, 0x94, 0x2e, 0x2e, 0xba, 0x3a, 0xbb, 0xb4,
+	0xfa, 0x6a, 0x17, 0xfe, 0xea, 0xef, 0x5e, 0x66,
+	0x97, 0x3f, 0x32, 0x3d, 0xd7, 0x3e, 0xb1, 0xf1,
+	0x6c, 0x14, 0x4c, 0xfd, 0x37, 0xd3, 0x38, 0x80,
+	0xfb, 0xde, 0xa6, 0x24, 0x1e, 0xc8, 0xca, 0x7f,
+	0x3a, 0x93, 0xd8, 0x8b, 0x18, 0x13, 0xb2, 0xe5,
+	0xe4, 0x93, 0x05, 0x53, 0x4f, 0x84, 0x66, 0xa7,
+	0x58, 0x5c, 0x7b, 0x86, 0x52, 0x6d, 0x0d, 0xce,
+	0xa4, 0x30, 0x7d, 0xb6, 0x18, 0x9f, 0xeb, 0xff,
+	0x22, 0xbb, 0x72, 0x29, 0xb9, 0x44, 0x0b, 0x48,
+	0x1e, 0x84, 0x71, 0x81, 0xe3, 0x6d, 0x73, 0x26,
+	0x92, 0xb4, 0x4d, 0x2a, 0x29, 0xb8, 0x1f, 0x72,
+	0xed, 0xd0, 0xe1, 0x64, 0x77, 0xea, 0x8e, 0x88,
+	0x0f, 0xef, 0x3f, 0xb1, 0x3b, 0xad, 0xf9, 0xc9,
+	0x8b, 0xd0, 0xac, 0xc6, 0xcc, 0xa9, 0x40, 0xcc,
+	0x76, 0xf6, 0x3b, 0x53, 0xb5, 0x88, 0xcb, 0xc8,
+	0x37, 0xf1, 0xa2, 0xba, 0x23, 0x15, 0x99, 0x09,
+	0xcc, 0xe7, 0x7a, 0x3b, 0x37, 0xf7, 0x58, 0xc8,
+	0x46, 0x8c, 0x2b, 0x2f, 0x4e, 0x0e, 0xa6, 0x5c,
+	0xea, 0x85, 0x55, 0xba, 0x02, 0x0e, 0x0e, 0x48,
+	0xbc, 0xe1, 0xb1, 0x01, 0x35, 0x79, 0x13, 0x3d,
+	0x1b, 0xc0, 0x53, 0x68, 0x11, 0xe7, 0x95, 0x0f,
+	0x9d, 0x3f, 0x4c, 0x47, 0x7b, 0x4d, 0x1c, 0xae,
+	0x50, 0x9b, 0xcb, 0xdd, 0x05, 0x8d, 0x9a, 0x97,
+	0xfd, 0x8c, 0xef, 0x0c, 0x1d, 0x67, 0x73, 0xa8,
+	0x28, 0x36, 0xd5, 0xb6, 0x92, 0x33, 0x40, 0x75,
+	0x0b, 0x51, 0xc3, 0x64, 0xba, 0x1d, 0xc2, 0xcc,
+	0xee, 0x7d, 0x54, 0x0f, 0x27, 0x69, 0xa7, 0x27,
+	0x63, 0x30, 0x29, 0xd9, 0xc8, 0x84, 0xd8, 0xdf,
+	0x9f, 0x68, 0x8d, 0x04, 0xca, 0xa6, 0xc5, 0xc7,
+	0x7a, 0x5c, 0xc8, 0xd1, 0xcb, 0x4a, 0xec, 0xd0,
+	0xd8, 0x20, 0x69, 0xc5, 0x17, 0xcd, 0x78, 0xc8,
+	0x75, 0x23, 0x30, 0x69, 0xc9, 0xd4, 0xea, 0x5c,
+	0x4f, 0x6b, 0x86, 0x3f, 0x8b, 0xfe, 0xee, 0x44,
+	0xc9, 0x7c, 0xb7, 0xdd, 0x3e, 0xe5, 0xec, 0x54,
+	0x03, 0x3e, 0xaa, 0x82, 0xc6, 0xdf, 0xb2, 0x38,
+	0x0e, 0x5d, 0xb3, 0x88, 0xd9, 0xd3, 0x69, 0x5f,
+	0x8f, 0x70, 0x8a, 0x7e, 0x11, 0xd9, 0x1e, 0x7b,
+	0x38, 0xf1, 0x42, 0x1a, 0xc0, 0x35, 0xf5, 0xc7,
+	0x36, 0x85, 0xf5, 0xf7, 0xb8, 0x7e, 0xc7, 0xef,
+	0x18, 0xf1, 0x63, 0xd6, 0x7a, 0xc6, 0xc9, 0x0e,
+	0x4d, 0x69, 0x4f, 0x84, 0xef, 0x26, 0x41, 0x0c,
+	0xec, 0xc7, 0xe0, 0x7e, 0x3c, 0x67, 0x01, 0x4c,
+	0x62, 0x1a, 0x20, 0x6f, 0xee, 0x47, 0x4d, 0xc0,
+	0x99, 0x13, 0x8d, 0x91, 0x4a, 0x26, 0xd4, 0x37,
+	0x28, 0x90, 0x58, 0x75, 0x66, 0x2b, 0x0a, 0xdf,
+	0xda, 0xee, 0x92, 0x25, 0x90, 0x62, 0x39, 0x9e,
+	0x44, 0x98, 0xad, 0xc1, 0x88, 0xed, 0xe4, 0xb4,
+	0xaf, 0xf5, 0x8c, 0x9b, 0x48, 0x4d, 0x56, 0x60,
+	0x97, 0x0f, 0x61, 0x59, 0x9e, 0xa6, 0x27, 0xfe,
+	0xc1, 0x91, 0x15, 0x38, 0xb8, 0x0f, 0xae, 0x61,
+	0x7d, 0x26, 0x13, 0x5a, 0x73, 0xff, 0x1c, 0xa3,
+	0x61, 0x04, 0x58, 0x48, 0x55, 0x44, 0x11, 0xfe,
+	0x15, 0xca, 0xc3, 0xbd, 0xca, 0xc5, 0xb4, 0x40,
+	0x5d, 0x1b, 0x7f, 0x39, 0xb5, 0x9c, 0x35, 0xec,
+	0x61, 0x15, 0x32, 0x32, 0xb8, 0x4e, 0x40, 0x9f,
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+	0x40, 0x7d, 0x45, 0xd9, 0x7a, 0x59, 0xee, 0x34,
+	0xf0, 0xe9, 0xd5, 0x7b, 0x96, 0xb1, 0x3d, 0x95,
+	0xcc, 0x86, 0xb5, 0xb6, 0x04, 0x2d, 0xb5, 0x92,
+	0x7e, 0x76, 0xf4, 0x06, 0xa9, 0xa3, 0x12, 0x0f,
+	0xb1, 0xaf, 0x26, 0xba, 0x7c, 0xfc, 0x7e, 0x1c,
+	0xbc, 0x2c, 0x49, 0x97, 0x53, 0x60, 0x13, 0x0b,
+	0xa6, 0x61, 0x83, 0x89, 0x42, 0xd4, 0x17, 0x0c,
+	0x6c, 0x26, 0x52, 0xc3, 0xb3, 0xd4, 0x67, 0xf5,
+	0xe3, 0x04, 0xb7, 0xf4, 0xcb, 0x80, 0xb8, 0xcb,
+	0x77, 0x56, 0x3e, 0xaa, 0x57, 0x54, 0xee, 0xb4,
+	0x2c, 0x67, 0xcf, 0xf2, 0xdc, 0xbe, 0x55, 0xf9,
+	0x43, 0x1f, 0x6e, 0x22, 0x97, 0x67, 0x7f, 0xc4,
+	0xef, 0xb1, 0x26, 0x31, 0x1e, 0x27, 0xdf, 0x41,
+	0x80, 0x47, 0x6c, 0xe2, 0xfa, 0xa9, 0x8c, 0x2a,
+	0xf6, 0xf2, 0xab, 0xf0, 0x15, 0xda, 0x6c, 0xc8,
+	0xfe, 0xb5, 0x23, 0xde, 0xa9, 0x05, 0x3f, 0x06,
+	0x54, 0x4c, 0xcd, 0xe1, 0xab, 0xfc, 0x0e, 0x62,
+	0x33, 0x31, 0x73, 0x2c, 0x76, 0xcb, 0xb4, 0x47,
+	0x1e, 0x20, 0xad, 0xd8, 0xf2, 0x31, 0xdd, 0xc4,
+	0x8b, 0x0c, 0x77, 0xbe, 0xe1, 0x8b, 0x26, 0x00,
+	0x02, 0x58, 0xd6, 0x8d, 0xef, 0xad, 0x74, 0x67,
+	0xab, 0x3f, 0xef, 0xcb, 0x6f, 0xb0, 0xcc, 0x81,
+	0x44, 0x4c, 0xaf, 0xe9, 0x49, 0x4f, 0xdb, 0xa0,
+	0x25, 0xa4, 0xf0, 0x89, 0xf1, 0xbe, 0xd8, 0x10,
+	0xff, 0xb1, 0x3b, 0x4b, 0xfa, 0x98, 0xf5, 0x79,
+	0x6d, 0x1e, 0x69, 0x4d, 0x57, 0xb1, 0xc8, 0x19,
+	0x1b, 0xbd, 0x1e, 0x8c, 0x84, 0xb7, 0x7b, 0xe8,
+	0xd2, 0x2d, 0x09, 0x41, 0x41, 0x37, 0x3d, 0xb1,
+	0x6f, 0x26, 0x5d, 0x71, 0x16, 0x3d, 0xb7, 0x83,
+	0x27, 0x2c, 0xa7, 0xb6, 0x50, 0xbd, 0x91, 0x86,
+	0xab, 0x24, 0xa1, 0x38, 0xfd, 0xea, 0x71, 0x55,
+	0x7e, 0x9a, 0x07, 0x77, 0x4b, 0xfa, 0x61, 0x66,
+	0x20, 0x1e, 0x28, 0x95, 0x18, 0x1b, 0xa4, 0xa0,
+	0xfd, 0xc0, 0x89, 0x72, 0x43, 0xd9, 0x3b, 0x49,
+	0x5a, 0x3f, 0x9d, 0xbf, 0xdb, 0xb4, 0x46, 0xea,
+	0x42, 0x01, 0x77, 0x23, 0x68, 0x95, 0xb6, 0x24,
+	0xb3, 0xa8, 0x6c, 0x28, 0x3b, 0x11, 0x40, 0x7e,
+	0x18, 0x65, 0x6d, 0xd8, 0x24, 0x42, 0x7d, 0x88,
+	0xc0, 0x52, 0xd9, 0x05, 0xe4, 0x95, 0x90, 0x87,
+	0x8c, 0xf4, 0xd0, 0x6b, 0xb9, 0x83, 0x99, 0x34,
+	0x6d, 0xfe, 0x54, 0x40, 0x94, 0x52, 0x21, 0x4f,
+	0x14, 0x25, 0xc5, 0xd6, 0x5e, 0x95, 0xdc, 0x0a,
+	0x2b, 0x89, 0x20, 0x11, 0x84, 0x48, 0xd6, 0x3a,
+	0xcd, 0x5c, 0x24, 0xad, 0x62, 0xe3, 0xb1, 0x93,
+	0x25, 0x8d, 0xcd, 0x7e, 0xfc, 0x27, 0xa3, 0x37,
+	0xfd, 0x84, 0xfc, 0x1b, 0xb2, 0xf1, 0x27, 0x38,
+	0x5a, 0xb7, 0xfc, 0xf2, 0xfa, 0x95, 0x66, 0xd4,
+	0xfb, 0xba, 0xa7, 0xd7, 0xa3, 0x72, 0x69, 0x48,
+	0x48, 0x8c, 0xeb, 0x28, 0x89, 0xfe, 0x33, 0x65,
+	0x5a, 0x36, 0x01, 0x7e, 0x06, 0x79, 0x0a, 0x09,
+	0x3b, 0x74, 0x11, 0x9a, 0x6e, 0xbf, 0xd4, 0x9e,
+	0x58, 0x90, 0x49, 0x4f, 0x4d, 0x08, 0xd4, 0xe5,
+	0x4a, 0x09, 0x21, 0xef, 0x8b, 0xb8, 0x74, 0x3b,
+	0x91, 0xdd, 0x36, 0x85, 0x60, 0x2d, 0xfa, 0xd4,
+	0x45, 0x7b, 0x45, 0x53, 0xf5, 0x47, 0x87, 0x7e,
+	0xa6, 0x37, 0xc8, 0x78, 0x7a, 0x68, 0x9d, 0x8d,
+	0x65, 0x2c, 0x0e, 0x91, 0x5c, 0xa2, 0x60, 0xf0,
+	0x8e, 0x3f, 0xe9, 0x1a, 0xcd, 0xaa, 0xe7, 0xd5,
+	0x77, 0x18, 0xaf, 0xc9, 0xbc, 0x18, 0xea, 0x48,
+	0x1b, 0xfb, 0x22, 0x48, 0x70, 0x16, 0x29, 0x9e,
+	0x5b, 0xc1, 0x2c, 0x66, 0x23, 0xbc, 0xf0, 0x1f,
+	0xef, 0xaf, 0xe4, 0xd6, 0x04, 0x19, 0x82, 0x7a,
+	0x0b, 0xba, 0x4b, 0x46, 0xb1, 0x6a, 0x85, 0x5d,
+	0xb4, 0x73, 0xd6, 0x21, 0xa1, 0x71, 0x60, 0x14,
+	0xee, 0x0a, 0x77, 0xc4, 0x66, 0x2e, 0xf9, 0x69,
+	0x30, 0xaf, 0x41, 0x0b, 0xc8, 0x83, 0x3c, 0x53,
+	0x99, 0x19, 0x27, 0x46, 0xf7, 0x41, 0x6e, 0x56,
+	0xdc, 0x94, 0x28, 0x67, 0x4e, 0xb7, 0x25, 0x48,
+	0x8a, 0xc2, 0xe0, 0x60, 0x96, 0xcc, 0x18, 0xf4,
+	0x84, 0xdd, 0xa7, 0x5e, 0x3e, 0x05, 0x0b, 0x26,
+	0x26, 0xb2, 0x5c, 0x1f, 0x57, 0x1a, 0x04, 0x7e,
+	0x6a, 0xe3, 0x2f, 0xb4, 0x35, 0xb6, 0x38, 0x40,
+	0x40, 0xcd, 0x6f, 0x87, 0x2e, 0xef, 0xa3, 0xd7,
+	0xa9, 0xc2, 0xe8, 0x0d, 0x27, 0xdf, 0x44, 0x62,
+	0x99, 0xa0, 0xfc, 0xcf, 0x81, 0x78, 0xcb, 0xfe,
+	0xe5, 0xa0, 0x03, 0x4e, 0x6c, 0xd7, 0xf4, 0xaf,
+	0x7a, 0xbb, 0x61, 0x82, 0xfe, 0x71, 0x89, 0xb2,
+	0x22, 0x7c, 0x8e, 0x83, 0x04, 0xce, 0xf6, 0x5d,
+	0x84, 0x8f, 0x95, 0x6a, 0x7f, 0xad, 0xfd, 0x32,
+	0x9c, 0x5e, 0xe4, 0x9c, 0x89, 0x60, 0x54, 0xaa,
+	0x96, 0x72, 0xd2, 0xd7, 0x36, 0x85, 0xa9, 0x45,
+	0xd2, 0x2a, 0xa1, 0x81, 0x49, 0x6f, 0x7e, 0x04,
+	0xfa, 0xe2, 0xfe, 0x90, 0x26, 0x77, 0x5a, 0x33,
+	0xb8, 0x04, 0x9a, 0x7a, 0xe6, 0x4c, 0x4f, 0xad,
+	0x72, 0x96, 0x08, 0x28, 0x58, 0x13, 0xf8, 0xc4,
+	0x1c, 0xf0, 0xc3, 0x45, 0x95, 0x49, 0x20, 0x8c,
+	0x9f, 0x39, 0x70, 0xe1, 0x77, 0xfe, 0xd5, 0x4b,
+	0xaf, 0x86, 0xda, 0xef, 0x22, 0x06, 0x83, 0x36,
+	0x29, 0x12, 0x11, 0x40, 0xbc, 0x3b, 0x86, 0xaa,
+	0xaa, 0x65, 0x60, 0xc3, 0x80, 0xca, 0xed, 0xa9,
+	0xf3, 0xb0, 0x79, 0x96, 0xa2, 0x55, 0x27, 0x28,
+	0x55, 0x73, 0x26, 0xa5, 0x50, 0xea, 0x92, 0x4b,
+	0x3c, 0x5c, 0x82, 0x33, 0xf0, 0x01, 0x3f, 0x03,
+	0xc1, 0x08, 0x05, 0xbf, 0x98, 0xf4, 0x9b, 0x6d,
+	0xa5, 0xa8, 0xb4, 0x82, 0x0c, 0x06, 0xfa, 0xff,
+	0x2d, 0x08, 0xf3, 0x05, 0x4f, 0x57, 0x2a, 0x39,
+	0xd4, 0x83, 0x0d, 0x75, 0x51, 0xd8, 0x5b, 0x1b,
+	0xd3, 0x51, 0x5a, 0x32, 0x2a, 0x9b, 0x32, 0xb2,
+	0xf2, 0xa4, 0x96, 0x12, 0xf2, 0xae, 0x40, 0x34,
+	0x67, 0xa8, 0xf5, 0x44, 0xd5, 0x35, 0x53, 0xfe,
+	0xa3, 0x60, 0x96, 0x63, 0x0f, 0x1f, 0x6e, 0xb0,
+	0x5a, 0x42, 0xa6, 0xfc, 0x51, 0x0b, 0x60, 0x27,
+	0xbc, 0x06, 0x71, 0xed, 0x65, 0x5b, 0x23, 0x86,
+	0x4a, 0x07, 0x3b, 0x22, 0x07, 0x46, 0xe6, 0x90,
+	0x3e, 0xf3, 0x25, 0x50, 0x1b, 0x4c, 0x7f, 0x03,
+	0x08, 0xa8, 0x36, 0x6b, 0x87, 0xe5, 0xe3, 0xdb,
+	0x9a, 0x38, 0x83, 0xff, 0x9f, 0x1a, 0x9f, 0x57,
+	0xa4, 0x2a, 0xf6, 0x37, 0xbc, 0x1a, 0xff, 0xc9,
+	0x1e, 0x35, 0x0c, 0xc3, 0x7c, 0xa3, 0xb2, 0xe5,
+	0xd2, 0xc6, 0xb4, 0x57, 0x47, 0xe4, 0x32, 0x16,
+	0x6d, 0xa9, 0xae, 0x64, 0xe6, 0x2d, 0x8d, 0xc5,
+	0x8d, 0x50, 0x8e, 0xe8, 0x1a, 0x22, 0x34, 0x2a,
+	0xd9, 0xeb, 0x51, 0x90, 0x4a, 0xb1, 0x41, 0x7d,
+	0x64, 0xf9, 0xb9, 0x0d, 0xf6, 0x23, 0x33, 0xb0,
+	0x33, 0xf4, 0xf7, 0x3f, 0x27, 0x84, 0xc6, 0x0f,
+	0x54, 0xa5, 0xc0, 0x2e, 0xec, 0x0b, 0x3a, 0x48,
+	0x6e, 0x80, 0x35, 0x81, 0x43, 0x9b, 0x90, 0xb1,
+	0xd0, 0x2b, 0xea, 0x21, 0xdc, 0xda, 0x5b, 0x09,
+	0xf4, 0xcc, 0x10, 0xb4, 0xc7, 0xfe, 0x79, 0x51,
+	0xc3, 0xc5, 0xac, 0x88, 0x74, 0x84, 0x0b, 0x4b,
+	0xca, 0x79, 0x16, 0x29, 0xfb, 0x69, 0x54, 0xdf,
+	0x41, 0x7e, 0xe9, 0xc7, 0x8e, 0xea, 0xa5, 0xfe,
+	0xfc, 0x76, 0x0e, 0x90, 0xc4, 0x92, 0x38, 0xad,
+	0x7b, 0x48, 0xe6, 0x6e, 0xf7, 0x21, 0xfd, 0x4e,
+	0x93, 0x0a, 0x7b, 0x41, 0x83, 0x68, 0xfb, 0x57,
+	0x51, 0x76, 0x34, 0xa9, 0x6c, 0x00, 0xaa, 0x4f,
+	0x66, 0x65, 0x98, 0x4a, 0x4f, 0xa3, 0xa0, 0xef,
+	0x69, 0x3f, 0xe3, 0x1c, 0x92, 0x8c, 0xfd, 0xd8,
+	0xe8, 0xde, 0x7c, 0x7f, 0x3e, 0x84, 0x8e, 0x69,
+	0x3c, 0xf1, 0xf2, 0x05, 0x46, 0xdc, 0x2f, 0x9d,
+	0x5e, 0x6e, 0x4c, 0xfb, 0xb5, 0x99, 0x2a, 0x59,
+	0x63, 0xc1, 0x34, 0xbc, 0x57, 0xc0, 0x0d, 0xb9,
+	0x61, 0x25, 0xf3, 0x33, 0x23, 0x51, 0xb6, 0x0d,
+	0x07, 0xa6, 0xab, 0x94, 0x4a, 0xb7, 0x2a, 0xea,
+	0xee, 0xac, 0xa3, 0xc3, 0x04, 0x8b, 0x0e, 0x56,
+	0xfe, 0x44, 0xa7, 0x39, 0xe2, 0xed, 0xed, 0xb4,
+	0x22, 0x2b, 0xac, 0x12, 0x32, 0x28, 0x91, 0xd8,
+	0xa5, 0xab, 0xff, 0x5f, 0xe0, 0x4b, 0xda, 0x78,
+	0x17, 0xda, 0xf1, 0x01, 0x5b, 0xcd, 0xe2, 0x5f,
+	0x50, 0x45, 0x73, 0x2b, 0xe4, 0x76, 0x77, 0xf4,
+	0x64, 0x1d, 0x43, 0xfb, 0x84, 0x7a, 0xea, 0x91,
+	0xae, 0xf9, 0x9e, 0xb7, 0xb4, 0xb0, 0x91, 0x5f,
+	0x16, 0x35, 0x9a, 0x11, 0xb8, 0xc7, 0xc1, 0x8c,
+	0xc6, 0x10, 0x8d, 0x2f, 0x63, 0x4a, 0xa7, 0x57,
+	0x3a, 0x51, 0xd6, 0x32, 0x2d, 0x64, 0x72, 0xd4,
+	0x66, 0xdc, 0x10, 0xa6, 0x67, 0xd6, 0x04, 0x23,
+	0x9d, 0x0a, 0x11, 0x77, 0xdd, 0x37, 0x94, 0x17,
+	0x3c, 0xbf, 0x8b, 0x65, 0xb0, 0x2e, 0x5e, 0x66,
+	0x47, 0x64, 0xac, 0xdd, 0xf0, 0x84, 0xfd, 0x39,
+	0xfa, 0x15, 0x5d, 0xef, 0xae, 0xca, 0xc1, 0x36,
+	0xa7, 0x5c, 0xbf, 0xc7, 0x08, 0xc2, 0x66, 0x00,
+	0x74, 0x74, 0x4e, 0x27, 0x3f, 0x55, 0x8a, 0xb7,
+	0x38, 0x66, 0x83, 0x6d, 0xcf, 0x99, 0x9e, 0x60,
+	0x8f, 0xdd, 0x2e, 0x62, 0x22, 0x0e, 0xef, 0x0c,
+	0x98, 0xa7, 0x85, 0x74, 0x3b, 0x9d, 0xec, 0x9e,
+	0xa9, 0x19, 0x72, 0xa5, 0x7f, 0x2c, 0x39, 0xb7,
+	0x7d, 0xb7, 0xf1, 0x12, 0x65, 0x27, 0x4b, 0x5a,
+	0xde, 0x17, 0xfe, 0xad, 0x44, 0xf3, 0x20, 0x4d,
+	0xfd, 0xe4, 0x1f, 0xb5, 0x81, 0xb0, 0x36, 0x37,
+	0x08, 0x6f, 0xc3, 0x0c, 0xe9, 0x85, 0x98, 0x82,
+	0xa9, 0x62, 0x0c, 0xc4, 0x97, 0xc0, 0x50, 0xc8,
+	0xa7, 0x3c, 0x50, 0x9f, 0x43, 0xb9, 0xcd, 0x5e,
+	0x4d, 0xfa, 0x1c, 0x4b, 0x0b, 0xa9, 0x98, 0x85,
+	0x38, 0x92, 0xac, 0x8d, 0xe4, 0xad, 0x9b, 0x98,
+	0xab, 0xd9, 0x38, 0xac, 0x62, 0x52, 0xa3, 0x22,
+	0x63, 0x0f, 0xbf, 0x95, 0x48, 0xdf, 0x69, 0xe7,
+	0x8b, 0x33, 0xd5, 0xb2, 0xbd, 0x05, 0x49, 0x49,
+	0x9d, 0x57, 0x73, 0x19, 0x33, 0xae, 0xfa, 0x33,
+	0xf1, 0x19, 0xa8, 0x80, 0xce, 0x04, 0x9f, 0xbc,
+	0x1d, 0x65, 0x82, 0x1b, 0xe5, 0x3a, 0x51, 0xc8,
+	0x1c, 0x21, 0xe3, 0x5d, 0xf3, 0x7d, 0x9b, 0x2f,
+	0x2c, 0x1d, 0x4a, 0x7f, 0x9b, 0x68, 0x35, 0xa3,
+	0xb2, 0x50, 0xf7, 0x62, 0x79, 0xcd, 0xf4, 0x98,
+	0x4f, 0xe5, 0x63, 0x7c, 0x3e, 0x45, 0x31, 0x8c,
+	0x16, 0xa0, 0x12, 0xc8, 0x58, 0xce, 0x39, 0xa6,
+	0xbc, 0x54, 0xdb, 0xc5, 0xe0, 0xd5, 0xba, 0xbc,
+	0xb9, 0x04, 0xf4, 0x8d, 0xe8, 0x2f, 0x15, 0x9d,
+};
+
+/* 100 test cases */
+static struct crc_test {
+	u32 crc;	/* random starting crc */
+	u32 start;	/* random 6 bit offset in buf */
+	u32 length;	/* random 11 bit length of test */
+	u32 crc32c_le;	/* expected crc32c_le result */
+} test[] =
+{
+	{0x674bf11d, 0x00000038, 0x00000542, 0xf6e93d6c},
+	{0x35c672c6, 0x0000003a, 0x000001aa, 0x0fe92aca},
+	{0x496da28e, 0x00000039, 0x000005af, 0x52e1ebb8},
+	{0x09a9b90e, 0x00000027, 0x000001f8, 0x0798af9a},
+	{0xdc97e5a9, 0x00000025, 0x000003b6, 0x18eb3152},
+	{0x47c58900, 0x0000000a, 0x000000b9, 0xd00d08c7},
+	{0x292561e8, 0x0000000c, 0x00000403, 0x8ba966bc},
+	{0x415037f6, 0x00000003, 0x00000676, 0x11d694a2},
+	{0x3466e707, 0x00000026, 0x00000042, 0x6ab3208d},
+	{0xafd1281b, 0x00000023, 0x000002ee, 0xba4603c5},
+	{0xd3857b18, 0x00000028, 0x000004a2, 0xe6071c6f},
+	{0x1d825a8f, 0x0000002b, 0x0000050b, 0x179ec30a},
+	{0x5033e3bc, 0x0000000b, 0x00000078, 0x0903beb8},
+	{0x94f1fb5e, 0x0000000f, 0x000003a2, 0x6a7cb4fa},
+	{0xc9a0fe14, 0x00000009, 0x00000473, 0xdb535801},
+	{0x88a034b1, 0x0000001c, 0x000005ad, 0x92bed597},
+	{0xf0f72239, 0x00000020, 0x0000026d, 0x192a3f1b},
+	{0xcc20a5e3, 0x0000003b, 0x0000067a, 0xccbaec1a},
+	{0xce589c95, 0x0000002b, 0x00000641, 0x7eabae4d},
+	{0x78edc885, 0x00000035, 0x000005be, 0x28c72982},
+	{0x9d40a377, 0x0000003b, 0x00000038, 0xc3cd4d18},
+	{0x703d0e01, 0x0000003c, 0x000006f1, 0xbca8f0e7},
+	{0x776bf505, 0x0000000f, 0x000005b2, 0x713f60b3},
+	{0x4a3e7854, 0x00000027, 0x000004b8, 0xebd08fd5},
+	{0x209172dd, 0x0000003b, 0x00000356, 0x64406c59},
+	{0x3ba4cc5b, 0x0000002f, 0x00000203, 0x7421890e},
+	{0xfc62f297, 0x00000000, 0x00000079, 0xe9347603},
+	{0x64280b8b, 0x00000016, 0x000007ab, 0x1bef9060},
+	{0x97dd724b, 0x00000033, 0x000007ad, 0x34720072},
+	{0x61394b52, 0x00000035, 0x00000571, 0x48310f59},
+	{0x29b4faff, 0x00000024, 0x0000006e, 0x783a4213},
+	{0x29bfb1dc, 0x0000000b, 0x00000244, 0x9e8efd41},
+	{0x86ae934b, 0x00000035, 0x00000104, 0xfc3d34a5},
+	{0xc4c1024e, 0x0000002e, 0x000006b1, 0x17a52ae2},
+	{0x3287a80a, 0x00000026, 0x00000496, 0x886d935a},
+	{0xa4db423e, 0x00000023, 0x0000045d, 0xeaaeaeb2},
+	{0x7a1078df, 0x00000015, 0x0000014a, 0x8e900a4b},
+	{0x6048bd5b, 0x00000006, 0x0000006a, 0xd74662b1},
+	{0xd8f9ea20, 0x0000003d, 0x00000277, 0xd26752ba},
+	{0xea5ec3b4, 0x0000002a, 0x000004fe, 0x8b1fcd62},
+	{0x2dfb005d, 0x00000016, 0x00000345, 0xf54342fe},
+	{0x5a214ade, 0x00000020, 0x000005b6, 0x5b95b988},
+	{0xf0ab9cca, 0x00000032, 0x00000515, 0x2e1176be},
+	{0x91b444f9, 0x0000002e, 0x000007f8, 0x66120546},
+	{0x1b5d2ddb, 0x0000002e, 0x0000012c, 0xf256a5cc},
+	{0xd824d1bb, 0x0000003a, 0x000007b5, 0x4af1dd69},
+	{0x0470180c, 0x00000034, 0x000001f0, 0x56f0a04a},
+	{0xffaa3a3f, 0x00000036, 0x00000299, 0x74f6b6b2},
+	{0x6406cfeb, 0x00000023, 0x00000600, 0x085951fd},
+	{0xb24aaa38, 0x0000003e, 0x000004a1, 0xc65387eb},
+	{0x58b2ab7c, 0x00000039, 0x000002b4, 0x1ca9257b},
+	{0x3db85970, 0x00000006, 0x000002b6, 0xfd196d76},
+	{0x857830c5, 0x00000003, 0x00000590, 0x5ef88339},
+	{0xe1fcd978, 0x0000003e, 0x000007d8, 0x2c3714d9},
+	{0xb982a768, 0x00000016, 0x000006e0, 0x58576548},
+	{0x1d581ce8, 0x0000001e, 0x0000058b, 0xfd7c57de},
+	{0x2456719b, 0x00000025, 0x00000503, 0xd5fedd59},
+	{0xfae6d8f2, 0x00000000, 0x0000055d, 0x1cc3b17b},
+	{0xcba828e3, 0x00000039, 0x000002ce, 0x270eed73},
+	{0x13d25952, 0x0000000a, 0x0000072d, 0x91ecbb11},
+	{0x0342be3f, 0x00000015, 0x00000599, 0x05ed8d0c},
+	{0xeaa344e0, 0x00000014, 0x000004d8, 0x0b09ad5b},
+	{0xbbb52021, 0x0000003b, 0x00000272, 0xf8d511fb},
+	{0xb66384dc, 0x0000001d, 0x000007fc, 0x5ad832cc},
+	{0x616c01b6, 0x00000022, 0x000002c8, 0x1214d196},
+	{0xce2bdaad, 0x00000016, 0x0000062a, 0x5747218a},
+	{0x00fe84d7, 0x00000005, 0x00000205, 0xde8f14de},
+	{0xbebdcb4c, 0x00000006, 0x0000055d, 0x3563b7b9},
+	{0xd8b1a02a, 0x00000010, 0x00000387, 0x071475d0},
+	{0x3b96cad2, 0x00000036, 0x00000347, 0x54c79d60},
+	{0xc94c1ed7, 0x00000005, 0x0000038b, 0x4c53eee6},
+	{0x1aad454e, 0x00000025, 0x000002b2, 0x10137a3c},
+	{0xa4fec9a6, 0x00000000, 0x000006d6, 0xaa9d6c73},
+	{0x1bbe71e2, 0x0000001f, 0x000002fd, 0xb63d23e7},
+	{0x4201c7e4, 0x00000002, 0x000002b7, 0x7f53e9cf},
+	{0x23fddc96, 0x00000003, 0x00000627, 0x13c1cd83},
+	{0xd82ba25c, 0x00000016, 0x0000063e, 0x49ff5867},
+	{0x786f2032, 0x0000002d, 0x0000060f, 0x8467f211},
+	{0xfebe4e1f, 0x0000002a, 0x000004f2, 0x3f9683b2},
+	{0x1a6e0a39, 0x00000008, 0x00000672, 0x76a3f874},
+	{0x56000ab8, 0x0000000e, 0x000000e5, 0x863b702f},
+	{0x4717fe0c, 0x00000000, 0x000006ec, 0xdc6c58ff},
+	{0xd5d5d68e, 0x0000003c, 0x000003a3, 0x0622cc95},
+	{0xc25dd6c6, 0x00000024, 0x000006c0, 0xe85605cd},
+	{0xe9b11300, 0x00000023, 0x00000683, 0x31da5f06},
+	{0x95cd285e, 0x00000001, 0x00000047, 0xa1f2e784},
+	{0xd9245a25, 0x0000001e, 0x000003a6, 0xb07cc616},
+	{0x103279db, 0x00000006, 0x0000039b, 0xbf943b6c},
+	{0x1cba3172, 0x00000027, 0x000001c8, 0x2c01af1c},
+	{0x8f613739, 0x0000000c, 0x000001df, 0x0fe5f56d},
+	{0x1c6aa90d, 0x0000001b, 0x0000053c, 0xf8943b2d},
+	{0xaabe5b93, 0x0000003d, 0x00000715, 0xe4d89272},
+	{0xf15dd038, 0x00000006, 0x000006db, 0x7c2f6bbb},
+	{0x584dd49c, 0x00000020, 0x000007bc, 0xabbf388b},
+	{0x5d8c9506, 0x00000020, 0x00000470, 0x1dca1f4e},
+	{0xb80d17b0, 0x00000032, 0x00000346, 0x5c170e23},
+	{0xdaf0592e, 0x00000023, 0x000007b0, 0xc0e9d672},
+	{0x4793cc85, 0x0000000d, 0x00000706, 0xc18bdc86},
+	{0x82ebf64e, 0x00000009, 0x000007c3, 0xa874fcdd},
+	{0xb18a0319, 0x00000026, 0x000007db, 0x9dc0bb48},
+};
+
+static int crc32c_test(void)
+{
+	int i;
+	int errors = 0;
+	int bytes = 0;
+	struct timeval start, stop;
+	uint64_t usec;
+
+	/* keep static to prevent cache warming code from
+	 * getting eliminated by the compiler */
+	static u32 crc;
+
+	/* pre-warm the cache */
+	for (i = 0; i < 100; i++) {
+		bytes += 2*test[i].length;
+
+		crc ^= crc32c_le(test[i].crc, test_buf +
+		    test[i].start, test[i].length);
+	}
+
+	gettimeofday(&start, NULL);
+	for (i = 0; i < 100; i++) {
+		if (test[i].crc32c_le != crc32c_le(test[i].crc, test_buf +
+		    test[i].start, test[i].length))
+			errors++;
+	}
+	gettimeofday(&stop, NULL);
+
+	usec = stop.tv_usec - start.tv_usec +
+		1000000 * (stop.tv_sec - start.tv_sec);
+
+	if (errors)
+		printf("crc32c: %d self tests failed\n", errors);
+	else {
+		printf("crc32c: tests passed, %d bytes in %" PRIu64 " usec\n",
+			bytes, usec);
+	}
+
+	return errors;
+}
+
+/*
+ * make sure we always return 0 for a successful test run, and non-zero for a
+ * failed run. The build infrastructure is looking for this information to
+ * determine whether to allow the build to proceed.
+ */
+int main(int argc, char **argv)
+{
+	int errors;
+
+	printf("CRC_LE_BITS = %d\n", CRC_LE_BITS);
+
+	errors = crc32c_test();
+
+	return errors != 0;
+}
+#endif /* CRC32_SELFTEST */
diff --git a/libfrog/crc32defs.h b/libfrog/crc32defs.h
new file mode 100644
index 0000000000..75f673bb5c
--- /dev/null
+++ b/libfrog/crc32defs.h
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Use slice-by-8, which is the fastest variant.
+ *
+ * Calculate checksum 8 bytes at a time with a clever slicing algorithm.
+ * This is the fastest algorithm, but comes with a 8KiB lookup table.
+ * Most modern processors have enough cache to hold this table without
+ * thrashing the cache.
+ *
+ * The Linux kernel uses this as the default implementation "unless you
+ * have a good reason not to".  The reason why Kconfig urges you to pick
+ * SLICEBY8 is because people challenged the assertion that we should
+ * always use slice by 8, so Darrick wrote a crc microbenchmark utility
+ * and ran it on as many machines as he could get his hands on to show
+ * that sb8 was the fastest.
+ *
+ * Every 64-bit machine (and most of the 32-bit ones too) saw the best
+ * results with sb8.  Any machine with more than 4K of cache saw better
+ * results.  The spreadsheet still exists today[1]; note that
+ * 'crc32-kern-le' corresponds to the slice by 4 algorithm which is the
+ * default unless CRC_LE_BITS is defined explicitly.
+ *
+ * FWIW, there are a handful of board defconfigs in the kernel that
+ * don't pick sliceby8.  These are all embedded 32-bit mips/ppc systems
+ * with very small cache sizes which experience cache thrashing with the
+ * slice by 8 algorithm, and therefore chose to pick defaults that are
+ * saner for their particular board configuration.  For nearly all of
+ * XFS' perceived userbase (which we assume are 32 and 64-bit machines
+ * with sufficiently large CPU cache and largeish storage devices) slice
+ * by 8 is the right choice.
+ *
+ * [1] https://goo.gl/0LSzsG ("crc32c_bench")
+ */
+#define CRC_LE_BITS 64
+
+/*
+ * This is the CRC32c polynomial, as outlined by Castagnoli.
+ * x^32+x^28+x^27+x^26+x^25+x^23+x^22+x^20+x^19+x^18+x^14+x^13+x^11+x^10+x^9+
+ * x^8+x^6+x^0
+ */
+#define CRC32C_POLY_LE 0x82F63B78
+
+/*
+ * Little-endian CRC computation.  Used with serial bit streams sent
+ * lsbit-first.  Be sure to use cpu_to_le32() to append the computed CRC.
+ */
+#if CRC_LE_BITS > 64 || CRC_LE_BITS < 1 || CRC_LE_BITS == 16 || \
+	CRC_LE_BITS & CRC_LE_BITS-1
+# error "CRC_LE_BITS must be one of {1, 2, 4, 8, 32, 64}"
+#endif
diff --git a/libfrog/gen_crc32table.c b/libfrog/gen_crc32table.c
new file mode 100644
index 0000000000..fdc7edce24
--- /dev/null
+++ b/libfrog/gen_crc32table.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include "crc32defs.h"
+#include <inttypes.h>
+
+#define ENTRIES_PER_LINE 4
+
+#if CRC_LE_BITS > 8
+# define LE_TABLE_ROWS (CRC_LE_BITS/8)
+# define LE_TABLE_SIZE 256
+#else
+# define LE_TABLE_ROWS 1
+# define LE_TABLE_SIZE (1 << CRC_LE_BITS)
+#endif
+
+static uint32_t crc32ctable_le[LE_TABLE_ROWS][256];
+
+/**
+ * crc32init_le() - allocate and initialize LE table data
+ *
+ * crc is the crc of the byte i; other entries are filled in based on the
+ * fact that crctable[i^j] = crctable[i] ^ crctable[j].
+ *
+ */
+static void crc32init_le_generic(const uint32_t polynomial,
+				 uint32_t (*tab)[256])
+{
+	unsigned i, j;
+	uint32_t crc = 1;
+
+	tab[0][0] = 0;
+
+	for (i = LE_TABLE_SIZE >> 1; i; i >>= 1) {
+		crc = (crc >> 1) ^ ((crc & 1) ? polynomial : 0);
+		for (j = 0; j < LE_TABLE_SIZE; j += 2 * i)
+			tab[0][i + j] = crc ^ tab[0][j];
+	}
+	for (i = 0; i < LE_TABLE_SIZE; i++) {
+		crc = tab[0][i];
+		for (j = 1; j < LE_TABLE_ROWS; j++) {
+			crc = tab[0][crc & 0xff] ^ (crc >> 8);
+			tab[j][i] = crc;
+		}
+	}
+}
+
+static void crc32cinit_le(void)
+{
+	crc32init_le_generic(CRC32C_POLY_LE, crc32ctable_le);
+}
+
+static void output_table(uint32_t (*table)[256], int rows, int len, char *trans)
+{
+	int i, j;
+
+	for (j = 0 ; j < rows; j++) {
+		printf("{");
+		for (i = 0; i < len - 1; i++) {
+			if (i % ENTRIES_PER_LINE == 0)
+				printf("\n");
+			printf("%s(0x%8.8xL), ", trans, table[j][i]);
+		}
+		printf("%s(0x%8.8xL)},\n", trans, table[j][len - 1]);
+	}
+}
+
+int main(int argc, char** argv)
+{
+	printf("/* this file is generated - do not edit */\n\n");
+
+	if (CRC_LE_BITS > 1) {
+		crc32cinit_le();
+		printf("static u32 crc32ctable_le[%d][%d] = {",
+		       LE_TABLE_ROWS, LE_TABLE_SIZE);
+		output_table(crc32ctable_le, LE_TABLE_ROWS,
+			     LE_TABLE_SIZE, "tole");
+		printf("};\n");
+	}
+
+	return 0;
+}