From: Dave Chinner <dchinner@xxxxxxxxxx>
Pull the generic crc32(c) code from the kernel and add it to libxfs.
Modify it to build in the libxfs environment, and drop the bigendian
CRC version as it is unused by XFS, which uses the little endian
version so that it can be hardware accelerated using native
instructions on x86-64 CPUs.
Also wire up the self-test code in the crc32 module to the build
infrastructure and make passing the self test a build dependency.
This prevents xfsprogs from being built on platforms that the CRC
algorithm does not work on and hence ensures the tools do not write
bad CRCs to disk as a result of a broken calculation.
Also pull the XFS CRC helper functions across in preparation for
using the CRC functions in libxfs.
XXX: something in the CRC table generation breaks the debian package
build. It fails to build libxfs as a dependency of mkfs.xfs. Works
fine outside the debian build environment, so I'm not sure what the
issue is yet. Most likely it is the execution path of the
gen_crc32table binary that is built...
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
---
include/Makefile | 6 +-
include/libxfs.h | 10 +
include/xfs_arch.h | 16 +
include/xfs_cksum.h | 63 +++
libxfs/Makefile | 26 +-
libxfs/crc32.c | 1036 +++++++++++++++++++++++++++++++++++++++++++++++
libxfs/crc32defs.h | 72 ++++
libxfs/gen_crc32table.c | 144 +++++++
8 files changed, 1367 insertions(+), 6 deletions(-)
create mode 100644 include/xfs_cksum.h
create mode 100644 libxfs/crc32.c
create mode 100644 libxfs/crc32defs.h
create mode 100644 libxfs/gen_crc32table.c
diff --git a/include/Makefile b/include/Makefile
index de2c4f0..9ed5077 100644
--- a/include/Makefile
+++ b/include/Makefile
@@ -23,9 +23,9 @@ QAHFILES = libxfs.h libxlog.h \
swab.h \
xfs_ag.h xfs_alloc.h xfs_alloc_btree.h xfs_arch.h xfs_attr_leaf.h \
xfs_attr_sf.h xfs_bit.h xfs_bmap.h xfs_bmap_btree.h xfs_btree.h \
- xfs_btree_trace.h xfs_buf_item.h xfs_da_btree.h xfs_dinode.h \
- xfs_dir2.h xfs_dir2_format.h xfs_dir1.h xfs_dir_leaf.h xfs_dir_sf.h \
- xfs_extfree_item.h xfs_ialloc.h xfs_ialloc_btree.h \
+ xfs_btree_trace.h xfs_buf_item.h xfs_cksum.h xfs_da_btree.h \
+ xfs_dinode.h xfs_dir2.h xfs_dir2_format.h xfs_dir1.h xfs_dir_leaf.h \
+ xfs_dir_sf.h xfs_extfree_item.h xfs_ialloc.h xfs_ialloc_btree.h \
xfs_inode.h xfs_inode_item.h xfs_inum.h \
xfs_log.h xfs_log_priv.h xfs_log_recover.h xfs_metadump.h \
xfs_mount.h xfs_quota.h xfs_rtalloc.h xfs_sb.h xfs_trace.h \
diff --git a/include/libxfs.h b/include/libxfs.h
index 0e2fc5f..e671391 100644
--- a/include/libxfs.h
+++ b/include/libxfs.h
@@ -668,4 +668,14 @@ void xfs_dinode_from_disk(struct xfs_icdinode *,
/* xfs_rtalloc.c */
int libxfs_rtfree_extent(struct xfs_trans *, xfs_rtblock_t, xfs_extlen_t);
+/* CRC wrappers */
+
+extern uint32_t crc32_le(uint32_t crc, unsigned char const *p, size_t len);
+extern uint32_t crc32c_le(uint32_t crc, unsigned char const *p, size_t len);
+
+#define crc32(c,p,l) crc32_le((c),(unsigned char const *)(p),(l))
+#define crc32c(c,p,l) crc32c_le((c),(unsigned char const *)(p),(l))
+
+#include <xfs/xfs_cksum.h>
+
#endif /* __LIBXFS_H__ */
diff --git a/include/xfs_arch.h b/include/xfs_arch.h
index 0902249..d5e591a 100644
--- a/include/xfs_arch.h
+++ b/include/xfs_arch.h
@@ -47,6 +47,14 @@
#define be16_to_cpu(val) ((__force __u16)(__be16)(val))
#define be32_to_cpu(val) ((__force __u32)(__be32)(val))
#define be64_to_cpu(val) ((__force __u64)(__be64)(val))
+
+#define cpu_to_le32(val) ((__force __be32)__swab32((__u32)(val)))
+#define le32_to_cpu(val) (__swab32((__force __u32)(__le32)(val)))
+
+#define __constant_cpu_to_le32(val) \
+ ((__force __le32)___constant_swab32((__u32)(val)))
+#define __constant_cpu_to_be32(val) \
+ ((__force __be32)(__u32)(val))
#else
#define cpu_to_be16(val) ((__force __be16)__swab16((__u16)(val)))
#define cpu_to_be32(val) ((__force __be32)__swab32((__u32)(val)))
@@ -54,6 +62,14 @@
#define be16_to_cpu(val) (__swab16((__force __u16)(__be16)(val)))
#define be32_to_cpu(val) (__swab32((__force __u32)(__be32)(val)))
#define be64_to_cpu(val) (__swab64((__force __u64)(__be64)(val)))
+
+#define cpu_to_le32(val) ((__force __le32)(__u32)(val))
+#define le32_to_cpu(val) ((__force __u32)(__le32)(val))
+
+#define __constant_cpu_to_le32(val) \
+ ((__force __le32)(__u32)(val))
+#define __constant_cpu_to_be32(val) \
+ ((__force __be32)___constant_swab32((__u32)(val)))
#endif
static inline void be16_add_cpu(__be16 *a, __s16 b)
diff --git a/include/xfs_cksum.h b/include/xfs_cksum.h
new file mode 100644
index 0000000..fad1676
--- /dev/null
+++ b/include/xfs_cksum.h
@@ -0,0 +1,63 @@
+#ifndef _XFS_CKSUM_H
+#define _XFS_CKSUM_H 1
+
+#define XFS_CRC_SEED (~(__uint32_t)0)
+
+/*
+ * Calculate the intermediate checksum for a buffer that has the CRC field
+ * inside it. The offset of the 32bit crc fields is passed as the
+ * cksum_offset parameter.
+ */
+static inline __uint32_t
+xfs_start_cksum(char *buffer, size_t length, unsigned long cksum_offset)
+{
+ __uint32_t zero = 0;
+ __uint32_t crc;
+
+ /* Calculate CRC up to the checksum. */
+ crc = crc32c(XFS_CRC_SEED, buffer, cksum_offset);
+
+ /* Skip checksum field */
+ crc = crc32c(crc, &zero, sizeof(__u32));
+
+ /* Calculate the rest of the CRC. */
+ return crc32c(crc, &buffer[cksum_offset + sizeof(__be32)],
+ length - (cksum_offset + sizeof(__be32)));
+}
+
+/*
+ * Convert the intermediate checksum to the final ondisk format.
+ *
+ * The CRC32c calculation uses LE format even on BE machines, but returns the
+ * result in host endian format. Hence we need to byte swap it back to LE format
+ * so that it is consistent on disk.
+ */
+static inline __le32
+xfs_end_cksum(__uint32_t crc)
+{
+ return ~cpu_to_le32(crc);
+}
+
+/*
+ * Helper to generate the checksum for a buffer.
+ */
+static inline void
+xfs_update_cksum(char *buffer, size_t length, unsigned long cksum_offset)
+{
+ __uint32_t crc = xfs_start_cksum(buffer, length, cksum_offset);
+
+ *(__le32 *)(buffer + cksum_offset) = xfs_end_cksum(crc);
+}
+
+/*
+ * Helper to verify the checksum for a buffer.
+ */
+static inline int
+xfs_verify_cksum(char *buffer, size_t length, unsigned long cksum_offset)
+{
+ __uint32_t crc = xfs_start_cksum(buffer, length, cksum_offset);
+
+ return *(__le32 *)(buffer + cksum_offset) == xfs_end_cksum(crc);
+}
+
+#endif /* _XFS_CKSUM_H */
diff --git a/libxfs/Makefile b/libxfs/Makefile
index dc9b22c..28f71c8 100644
--- a/libxfs/Makefile
+++ b/libxfs/Makefile
@@ -10,17 +10,19 @@ LT_CURRENT = 0
LT_REVISION = 0
LT_AGE = 0
-HFILES = xfs.h init.h xfs_dir2_priv.h
+HFILES = xfs.h init.h xfs_dir2_priv.h crc32defs.h crc32table.h
CFILES = cache.c init.c kmem.c logitem.c radix-tree.c rdwr.c trans.c util.c \
xfs_alloc.c xfs_ialloc.c xfs_inode.c xfs_btree.c xfs_alloc_btree.c \
xfs_ialloc_btree.c xfs_bmap_btree.c xfs_da_btree.c \
xfs_dir2.c xfs_dir2_leaf.c xfs_attr_leaf.c xfs_dir2_block.c \
xfs_dir2_node.c xfs_dir2_data.c xfs_dir2_sf.c xfs_bmap.c \
- xfs_mount.c xfs_rtalloc.c xfs_trans.c xfs_attr.c
+ xfs_mount.c xfs_rtalloc.c xfs_trans.c xfs_attr.c \
+ crc32.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")
+LSRCFILES += gen_crc32table.c
#
# Tracing flags:
@@ -38,7 +40,25 @@ LTLIBS = $(LIBPTHREAD) $(LIBRT)
# don't try linking xfs_repair with a debug libxfs.
DEBUG = -DNDEBUG
-default: ltdepend $(LTLIBRARY)
+LDIRT = gen_crc32table crc32table.h crc32selftest
+
+default: crc32selftest ltdepend $(LTLIBRARY)
+
+crc32table.h: gen_crc32table.c
+ @echo " [CC] gen_crc32table"
+ $(Q) $(CC) $(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
+ @echo " [TEST] CRC32"
+ $(Q) $(CC) $(CFLAGS) -D CRC32_SELFTEST=1 crc32.c -o $@
+ $(Q) ./$@
include $(BUILDRULES)
diff --git a/libxfs/crc32.c b/libxfs/crc32.c
new file mode 100644
index 0000000..1c0d958
--- /dev/null
+++ b/libxfs/crc32.c
@@ -0,0 +1,1036 @@
+/*
+ * 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@xxxxxxxx>
+ * Nicer crc32 functions/docs submitted by linux@xxxxxxxxxxx. 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@xxxxxxxx>
+ * 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.
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2. See the file COPYING for more details.
+ */
+
+/* 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 <libxfs.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
+
+#if CRC_BE_BITS > 8
+# define tobe(x) ((__force u32) __constant_cpu_to_be32(x))
+#else
+# define tobe(x) (x)
+#endif
+
+#include "crc32table.h"
+
+#if CRC_LE_BITS > 8 || CRC_BE_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])
+{
+# ifdef __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])
+# else
+# 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])
+# 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 crc32_le(u32 crc, unsigned char const *p, size_t len)
+{
+ return crc32_le_generic(crc, p, len, NULL, CRCPOLY_LE);
+}
+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 crc32_le(u32 crc, unsigned char const *p, size_t len)
+{
+ return crc32_le_generic(crc, p, len,
+ (const u32 (*)[256])crc32table_le, CRCPOLY_LE);
+}
+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,
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+ 0x31, 0xa3, 0xe4, 0x70, 0x59, 0xb1, 0x21, 0xbe,
+ 0x7e, 0x65, 0x7d, 0xb8, 0x04, 0xab, 0xf6, 0xe4,
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+ 0x07, 0xcc, 0x29, 0x17, 0x05, 0x78, 0x1a, 0xc1,
+ 0xb1, 0xce, 0xfc, 0xaa, 0x2d, 0xe7, 0xcc, 0x85,
+ 0x84, 0x84, 0x03, 0x2a, 0x0c, 0x3f, 0xa9, 0xf8,
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+ 0xf0, 0xd2, 0x6c, 0x32, 0x03, 0xb0, 0xa0, 0x8c,
+ 0x52, 0xeb, 0x23, 0x91, 0x88, 0x43, 0x13, 0x46,
+ 0xf6, 0x1e, 0xb4, 0x1b, 0xf5, 0x8e, 0x3a, 0xb5,
+ 0x3d, 0x00, 0xf6, 0xe5, 0x08, 0x3d, 0x5f, 0x39,
+ 0xd3, 0x21, 0x69, 0xbc, 0x03, 0x22, 0x3a, 0xd2,
+ 0x5c, 0x84, 0xf8, 0x15, 0xc4, 0x80, 0x0b, 0xbc,
+ 0x29, 0x3c, 0xf3, 0x95, 0x98, 0xcd, 0x8f, 0x35,
+ 0xbc, 0xa5, 0x3e, 0xfc, 0xd4, 0x13, 0x9e, 0xde,
+ 0x4f, 0xce, 0x71, 0x9d, 0x09, 0xad, 0xf2, 0x80,
+ 0x6b, 0x65, 0x7f, 0x03, 0x00, 0x14, 0x7c, 0x15,
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+ 0x35, 0x4f, 0x4d, 0xe0, 0xd9, 0xd5, 0x3c, 0x58,
+ 0x56, 0x23, 0x80, 0xe2, 0x36, 0xdd, 0x75, 0x1d,
+ 0x94, 0x11, 0x41, 0x8e, 0xe0, 0x81, 0x8e, 0xcf,
+ 0xe0, 0xe5, 0xf6, 0xde, 0xd1, 0xe7, 0x04, 0x12,
+ 0x79, 0x92, 0x2b, 0x71, 0x2a, 0x79, 0x8b, 0x7c,
+ 0x44, 0x79, 0x16, 0x30, 0x4e, 0xf4, 0xf6, 0x9b,
+ 0xb7, 0x40, 0xa3, 0x5a, 0xa7, 0x69, 0x3e, 0xc1,
+ 0x3a, 0x04, 0xd0, 0x88, 0xa0, 0x3b, 0xdd, 0xc6,
+ 0x9e, 0x7e, 0x1e, 0x1e, 0x8f, 0x44, 0xf7, 0x73,
+ 0x67, 0x1e, 0x1a, 0x78, 0xfa, 0x62, 0xf4, 0xa9,
+ 0xa8, 0xc6, 0x5b, 0xb8, 0xfa, 0x06, 0x7d, 0x5e,
+ 0x38, 0x1c, 0x9a, 0x39, 0xe9, 0x39, 0x98, 0x22,
+ 0x0b, 0xa7, 0xac, 0x0b, 0xf3, 0xbc, 0xf1, 0xeb,
+ 0x8c, 0x81, 0xe3, 0x48, 0x8a, 0xed, 0x42, 0xc2,
+ 0x38, 0xcf, 0x3e, 0xda, 0xd2, 0x89, 0x8d, 0x9c,
+ 0x53, 0xb5, 0x2f, 0x41, 0x01, 0x26, 0x84, 0x9c,
+ 0xa3, 0x56, 0xf6, 0x49, 0xc7, 0xd4, 0x9f, 0x93,
+ 0x1b, 0x96, 0x49, 0x5e, 0xad, 0xb3, 0x84, 0x1f,
+ 0x3c, 0xa4, 0xe0, 0x9b, 0xd1, 0x90, 0xbc, 0x38,
+ 0x6c, 0xdd, 0x95, 0x4d, 0x9d, 0xb1, 0x71, 0x57,
+ 0x2d, 0x34, 0xe8, 0xb8, 0x42, 0xc7, 0x99, 0x03,
+ 0xc7, 0x07, 0x30, 0x65, 0x91, 0x55, 0xd5, 0x90,
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+ 0xce, 0xec, 0xdc, 0x34, 0xd5, 0xd3, 0xb7, 0xc4,
+ 0xb8, 0x97, 0x05, 0x92, 0xad, 0xf8, 0xe2, 0x36,
+ 0x64, 0x41, 0xc9, 0xc5, 0x41, 0x77, 0x52, 0xd7,
+ 0x2c, 0xa5, 0x24, 0x2f, 0xd9, 0x34, 0x0b, 0x47,
+ 0x35, 0xa7, 0x28, 0x8b, 0xc5, 0xcd, 0xe9, 0x46,
+ 0xac, 0x39, 0x94, 0x3c, 0x10, 0xc6, 0x29, 0x73,
+ 0x0e, 0x0e, 0x5d, 0xe0, 0x71, 0x03, 0x8a, 0x72,
+ 0x0e, 0x26, 0xb0, 0x7d, 0x84, 0xed, 0x95, 0x23,
+ 0x49, 0x5a, 0x45, 0x83, 0x45, 0x60, 0x11, 0x4a,
+ 0x46, 0x31, 0xd4, 0xd8, 0x16, 0x54, 0x98, 0x58,
+ 0xed, 0x6d, 0xcc, 0x5d, 0xd6, 0x50, 0x61, 0x9f,
+ 0x9d, 0xc5, 0x3e, 0x9d, 0x32, 0x47, 0xde, 0x96,
+ 0xe1, 0x5d, 0xd8, 0xf8, 0xb4, 0x69, 0x6f, 0xb9,
+ 0x15, 0x90, 0x57, 0x7a, 0xf6, 0xad, 0xb0, 0x5b,
+ 0xf5, 0xa6, 0x36, 0x94, 0xfd, 0x84, 0xce, 0x1c,
+ 0x0f, 0x4b, 0xd0, 0xc2, 0x5b, 0x6b, 0x56, 0xef,
+ 0x73, 0x93, 0x0b, 0xc3, 0xee, 0xd9, 0xcf, 0xd3,
+ 0xa4, 0x22, 0x58, 0xcd, 0x50, 0x6e, 0x65, 0xf4,
+ 0xe9, 0xb7, 0x71, 0xaf, 0x4b, 0xb3, 0xb6, 0x2f,
+ 0x0f, 0x0e, 0x3b, 0xc9, 0x85, 0x14, 0xf5, 0x17,
+ 0xe8, 0x7a, 0x3a, 0xbf, 0x5f, 0x5e, 0xf8, 0x18,
+ 0x48, 0xa6, 0x72, 0xab, 0x06, 0x95, 0xe9, 0xc8,
+ 0xa7, 0xf4, 0x32, 0x44, 0x04, 0x0c, 0x84, 0x98,
+ 0x73, 0xe3, 0x89, 0x8d, 0x5f, 0x7e, 0x4a, 0x42,
+ 0x8f, 0xc5, 0x28, 0xb1, 0x82, 0xef, 0x1c, 0x97,
+ 0x31, 0x3b, 0x4d, 0xe0, 0x0e, 0x10, 0x10, 0x97,
+ 0x93, 0x49, 0x78, 0x2f, 0x0d, 0x86, 0x8b, 0xa1,
+ 0x53, 0xa9, 0x81, 0x20, 0x79, 0xe7, 0x07, 0x77,
+ 0xb6, 0xac, 0x5e, 0xd2, 0x05, 0xcd, 0xe9, 0xdb,
+ 0x8a, 0x94, 0x82, 0x8a, 0x23, 0xb9, 0x3d, 0x1c,
+ 0xa9, 0x7d, 0x72, 0x4a, 0xed, 0x33, 0xa3, 0xdb,
+ 0x21, 0xa7, 0x86, 0x33, 0x45, 0xa5, 0xaa, 0x56,
+ 0x45, 0xb5, 0x83, 0x29, 0x40, 0x47, 0x79, 0x04,
+ 0x6e, 0xb9, 0x95, 0xd0, 0x81, 0x77, 0x2d, 0x48,
+ 0x1e, 0xfe, 0xc3, 0xc2, 0x1e, 0xe5, 0xf2, 0xbe,
+ 0xfd, 0x3b, 0x94, 0x9f, 0xc4, 0xc4, 0x26, 0x9d,
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+ 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 crc_le; /* expected crc32_le result */
+ u32 crc_be; /* expected crc32_be result */
+ u32 crc32c_le; /* expected crc32c_le result */
+} test[] =
+{
+ {0x674bf11d, 0x00000038, 0x00000542, 0x0af6d466, 0xd8b6e4c1,
+ 0xf6e93d6c},
+ {0x35c672c6, 0x0000003a, 0x000001aa, 0xc6d3dfba, 0x28aaf3ad,
+ 0x0fe92aca},
+ {0x496da28e, 0x00000039, 0x000005af, 0xd933660f, 0x5d57e81f,
+ 0x52e1ebb8},
+ {0x09a9b90e, 0x00000027, 0x000001f8, 0xb45fe007, 0xf45fca9a,
+ 0x0798af9a},
+ {0xdc97e5a9, 0x00000025, 0x000003b6, 0xf81a3562, 0xe0126ba2,
+ 0x18eb3152},
+ {0x47c58900, 0x0000000a, 0x000000b9, 0x8e58eccf, 0xf3afc793,
+ 0xd00d08c7},
+ {0x292561e8, 0x0000000c, 0x00000403, 0xa2ba8aaf, 0x0b797aed,
+ 0x8ba966bc},
+ {0x415037f6, 0x00000003, 0x00000676, 0xa17d52e8, 0x7f0fdf35,
+ 0x11d694a2},
+ {0x3466e707, 0x00000026, 0x00000042, 0x258319be, 0x75c484a2,
+ 0x6ab3208d},
+ {0xafd1281b, 0x00000023, 0x000002ee, 0x4428eaf8, 0x06c7ad10,
+ 0xba4603c5},
+ {0xd3857b18, 0x00000028, 0x000004a2, 0x5c430821, 0xb062b7cb,
+ 0xe6071c6f},
+ {0x1d825a8f, 0x0000002b, 0x0000050b, 0xd2c45f0c, 0xd68634e0,
+ 0x179ec30a},
+ {0x5033e3bc, 0x0000000b, 0x00000078, 0xa3ea4113, 0xac6d31fb,
+ 0x0903beb8},
+ {0x94f1fb5e, 0x0000000f, 0x000003a2, 0xfbfc50b1, 0x3cfe50ed,
+ 0x6a7cb4fa},
+ {0xc9a0fe14, 0x00000009, 0x00000473, 0x5fb61894, 0x87070591,
+ 0xdb535801},
+ {0x88a034b1, 0x0000001c, 0x000005ad, 0xc1b16053, 0x46f95c67,
+ 0x92bed597},
+ {0xf0f72239, 0x00000020, 0x0000026d, 0xa6fa58f3, 0xf8c2c1dd,
+ 0x192a3f1b},
+ {0xcc20a5e3, 0x0000003b, 0x0000067a, 0x7740185a, 0x308b979a,
+ 0xccbaec1a},
+ {0xce589c95, 0x0000002b, 0x00000641, 0xd055e987, 0x40aae25b,
+ 0x7eabae4d},
+ {0x78edc885, 0x00000035, 0x000005be, 0xa39cb14b, 0x035b0d1f,
+ 0x28c72982},
+ {0x9d40a377, 0x0000003b, 0x00000038, 0x1f47ccd2, 0x197fbc9d,
+ 0xc3cd4d18},
+ {0x703d0e01, 0x0000003c, 0x000006f1, 0x88735e7c, 0xfed57c5a,
+ 0xbca8f0e7},
+ {0x776bf505, 0x0000000f, 0x000005b2, 0x5cc4fc01, 0xf32efb97,
+ 0x713f60b3},
+ {0x4a3e7854, 0x00000027, 0x000004b8, 0x8d923c82, 0x0cbfb4a2,
+ 0xebd08fd5},
+ {0x209172dd, 0x0000003b, 0x00000356, 0xb89e9c2b, 0xd7868138,
+ 0x64406c59},
+ {0x3ba4cc5b, 0x0000002f, 0x00000203, 0xe51601a9, 0x5b2a1032,
+ 0x7421890e},
+ {0xfc62f297, 0x00000000, 0x00000079, 0x71a8e1a2, 0x5d88685f,
+ 0xe9347603},
+ {0x64280b8b, 0x00000016, 0x000007ab, 0x0fa7a30c, 0xda3a455f,
+ 0x1bef9060},
+ {0x97dd724b, 0x00000033, 0x000007ad, 0x5788b2f4, 0xd7326d32,
+ 0x34720072},
+ {0x61394b52, 0x00000035, 0x00000571, 0xc66525f1, 0xcabe7fef,
+ 0x48310f59},
+ {0x29b4faff, 0x00000024, 0x0000006e, 0xca13751e, 0x993648e0,
+ 0x783a4213},
+ {0x29bfb1dc, 0x0000000b, 0x00000244, 0x436c43f7, 0x429f7a59,
+ 0x9e8efd41},
+ {0x86ae934b, 0x00000035, 0x00000104, 0x0760ec93, 0x9cf7d0f4,
+ 0xfc3d34a5},
+ {0xc4c1024e, 0x0000002e, 0x000006b1, 0x6516a3ec, 0x19321f9c,
+ 0x17a52ae2},
+ {0x3287a80a, 0x00000026, 0x00000496, 0x0b257eb1, 0x754ebd51,
+ 0x886d935a},
+ {0xa4db423e, 0x00000023, 0x0000045d, 0x9b3a66dc, 0x873e9f11,
+ 0xeaaeaeb2},
+ {0x7a1078df, 0x00000015, 0x0000014a, 0x8c2484c5, 0x6a628659,
+ 0x8e900a4b},
+ {0x6048bd5b, 0x00000006, 0x0000006a, 0x897e3559, 0xac9961af,
+ 0xd74662b1},
+ {0xd8f9ea20, 0x0000003d, 0x00000277, 0x60eb905b, 0xed2aaf99,
+ 0xd26752ba},
+ {0xea5ec3b4, 0x0000002a, 0x000004fe, 0x869965dc, 0x6c1f833b,
+ 0x8b1fcd62},
+ {0x2dfb005d, 0x00000016, 0x00000345, 0x6a3b117e, 0xf05e8521,
+ 0xf54342fe},
+ {0x5a214ade, 0x00000020, 0x000005b6, 0x467f70be, 0xcb22ccd3,
+ 0x5b95b988},
+ {0xf0ab9cca, 0x00000032, 0x00000515, 0xed223df3, 0x7f3ef01d,
+ 0x2e1176be},
+ {0x91b444f9, 0x0000002e, 0x000007f8, 0x84e9a983, 0x5676756f,
+ 0x66120546},
+ {0x1b5d2ddb, 0x0000002e, 0x0000012c, 0xba638c4c, 0x3f42047b,
+ 0xf256a5cc},
+ {0xd824d1bb, 0x0000003a, 0x000007b5, 0x6288653b, 0x3a3ebea0,
+ 0x4af1dd69},
+ {0x0470180c, 0x00000034, 0x000001f0, 0x9d5b80d6, 0x3de08195,
+ 0x56f0a04a},
+ {0xffaa3a3f, 0x00000036, 0x00000299, 0xf3a82ab8, 0x53e0c13d,
+ 0x74f6b6b2},
+ {0x6406cfeb, 0x00000023, 0x00000600, 0xa920b8e8, 0xe4e2acf4,
+ 0x085951fd},
+ {0xb24aaa38, 0x0000003e, 0x000004a1, 0x657cc328, 0x5077b2c3,
+ 0xc65387eb},
+ {0x58b2ab7c, 0x00000039, 0x000002b4, 0x3a17ee7e, 0x9dcb3643,
+ 0x1ca9257b},
+ {0x3db85970, 0x00000006, 0x000002b6, 0x95268b59, 0xb9812c10,
+ 0xfd196d76},
+ {0x857830c5, 0x00000003, 0x00000590, 0x4ef439d5, 0xf042161d,
+ 0x5ef88339},
+ {0xe1fcd978, 0x0000003e, 0x000007d8, 0xae8d8699, 0xce0a1ef5,
+ 0x2c3714d9},
+ {0xb982a768, 0x00000016, 0x000006e0, 0x62fad3df, 0x5f8a067b,
+ 0x58576548},
+ {0x1d581ce8, 0x0000001e, 0x0000058b, 0xf0f5da53, 0x26e39eee,
+ 0xfd7c57de},
+ {0x2456719b, 0x00000025, 0x00000503, 0x4296ac64, 0xd50e4c14,
+ 0xd5fedd59},
+ {0xfae6d8f2, 0x00000000, 0x0000055d, 0x057fdf2e, 0x2a31391a,
+ 0x1cc3b17b},
+ {0xcba828e3, 0x00000039, 0x000002ce, 0xe3f22351, 0x8f00877b,
+ 0x270eed73},
+ {0x13d25952, 0x0000000a, 0x0000072d, 0x76d4b4cc, 0x5eb67ec3,
+ 0x91ecbb11},
+ {0x0342be3f, 0x00000015, 0x00000599, 0xec75d9f1, 0x9d4d2826,
+ 0x05ed8d0c},
+ {0xeaa344e0, 0x00000014, 0x000004d8, 0x72a4c981, 0x2064ea06,
+ 0x0b09ad5b},
+ {0xbbb52021, 0x0000003b, 0x00000272, 0x04af99fc, 0xaf042d35,
+ 0xf8d511fb},
+ {0xb66384dc, 0x0000001d, 0x000007fc, 0xd7629116, 0x782bd801,
+ 0x5ad832cc},
+ {0x616c01b6, 0x00000022, 0x000002c8, 0x5b1dab30, 0x783ce7d2,
+ 0x1214d196},
+ {0xce2bdaad, 0x00000016, 0x0000062a, 0x932535c8, 0x3f02926d,
+ 0x5747218a},
+ {0x00fe84d7, 0x00000005, 0x00000205, 0x850e50aa, 0x753d649c,
+ 0xde8f14de},
+ {0xbebdcb4c, 0x00000006, 0x0000055d, 0xbeaa37a2, 0x2d8c9eba,
+ 0x3563b7b9},
+ {0xd8b1a02a, 0x00000010, 0x00000387, 0x5017d2fc, 0x503541a5,
+ 0x071475d0},
+ {0x3b96cad2, 0x00000036, 0x00000347, 0x1d2372ae, 0x926cd90b,
+ 0x54c79d60},
+ {0xc94c1ed7, 0x00000005, 0x0000038b, 0x9e9fdb22, 0x144a9178,
+ 0x4c53eee6},
+ {0x1aad454e, 0x00000025, 0x000002b2, 0xc3f6315c, 0x5c7a35b3,
+ 0x10137a3c},
+ {0xa4fec9a6, 0x00000000, 0x000006d6, 0x90be5080, 0xa4107605,
+ 0xaa9d6c73},
+ {0x1bbe71e2, 0x0000001f, 0x000002fd, 0x4e504c3b, 0x284ccaf1,
+ 0xb63d23e7},
+ {0x4201c7e4, 0x00000002, 0x000002b7, 0x7822e3f9, 0x0cc912a9,
+ 0x7f53e9cf},
+ {0x23fddc96, 0x00000003, 0x00000627, 0x8a385125, 0x07767e78,
+ 0x13c1cd83},
+ {0xd82ba25c, 0x00000016, 0x0000063e, 0x98e4148a, 0x283330c9,
+ 0x49ff5867},
+ {0x786f2032, 0x0000002d, 0x0000060f, 0xf201600a, 0xf561bfcd,
+ 0x8467f211},
+ {0xfebe4e1f, 0x0000002a, 0x000004f2, 0x95e51961, 0xfd80dcab,
+ 0x3f9683b2},
+ {0x1a6e0a39, 0x00000008, 0x00000672, 0x8af6c2a5, 0x78dd84cb,
+ 0x76a3f874},
+ {0x56000ab8, 0x0000000e, 0x000000e5, 0x36bacb8f, 0x22ee1f77,
+ 0x863b702f},
+ {0x4717fe0c, 0x00000000, 0x000006ec, 0x8439f342, 0x5c8e03da,
+ 0xdc6c58ff},
+ {0xd5d5d68e, 0x0000003c, 0x000003a3, 0x46fff083, 0x177d1b39,
+ 0x0622cc95},
+ {0xc25dd6c6, 0x00000024, 0x000006c0, 0x5ceb8eb4, 0x892b0d16,
+ 0xe85605cd},
+ {0xe9b11300, 0x00000023, 0x00000683, 0x07a5d59a, 0x6c6a3208,
+ 0x31da5f06},
+ {0x95cd285e, 0x00000001, 0x00000047, 0x7b3a4368, 0x0202c07e,
+ 0xa1f2e784},
+ {0xd9245a25, 0x0000001e, 0x000003a6, 0xd33c1841, 0x1936c0d5,
+ 0xb07cc616},
+ {0x103279db, 0x00000006, 0x0000039b, 0xca09b8a0, 0x77d62892,
+ 0xbf943b6c},
+ {0x1cba3172, 0x00000027, 0x000001c8, 0xcb377194, 0xebe682db,
+ 0x2c01af1c},
+ {0x8f613739, 0x0000000c, 0x000001df, 0xb4b0bc87, 0x7710bd43,
+ 0x0fe5f56d},
+ {0x1c6aa90d, 0x0000001b, 0x0000053c, 0x70559245, 0xda7894ac,
+ 0xf8943b2d},
+ {0xaabe5b93, 0x0000003d, 0x00000715, 0xcdbf42fa, 0x0c3b99e7,
+ 0xe4d89272},
+ {0xf15dd038, 0x00000006, 0x000006db, 0x6e104aea, 0x8d5967f2,
+ 0x7c2f6bbb},
+ {0x584dd49c, 0x00000020, 0x000007bc, 0x36b6cfd6, 0xad4e23b2,
+ 0xabbf388b},
+ {0x5d8c9506, 0x00000020, 0x00000470, 0x4c62378e, 0x31d92640,
+ 0x1dca1f4e},
+ {0xb80d17b0, 0x00000032, 0x00000346, 0x22a5bb88, 0x9a7ec89f,
+ 0x5c170e23},
+ {0xdaf0592e, 0x00000023, 0x000007b0, 0x3cab3f99, 0x9b1fdd99,
+ 0xc0e9d672},
+ {0x4793cc85, 0x0000000d, 0x00000706, 0xe82e04f6, 0xed3db6b7,
+ 0xc18bdc86},
+ {0x82ebf64e, 0x00000009, 0x000007c3, 0x69d590a9, 0x9efa8499,
+ 0xa874fcdd},
+ {0xb18a0319, 0x00000026, 0x000007db, 0x1cf98dcc, 0x8fa9ad6a,
+ 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;
+}
+
+static int crc32_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 ^= crc32_le(test[i].crc, test_buf +
+ test[i].start, test[i].length);
+
+#if 0 /* not used */
+ crc ^= crc32_be(test[i].crc, test_buf +
+ test[i].start, test[i].length);
+#endif
+ }
+
+ gettimeofday(&start, NULL);
+ for (i = 0; i < 100; i++) {
+ if (test[i].crc_le != crc32_le(test[i].crc, test_buf +
+ test[i].start, test[i].length))
+ errors++;
+
+#if 0 /* not used */
+ if (test[i].crc_be != crc32_be(test[i].crc, test_buf +
+ test[i].start, test[i].length))
+ errors++;
+#endif
+ }
+ gettimeofday(&stop, NULL);
+
+ usec = stop.tv_usec - start.tv_usec +
+ 1000000000 * (stop.tv_sec - start.tv_sec);
+
+ if (errors)
+ printf("crc32: %d self tests failed\n", errors);
+ else {
+ printf("crc32: 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 = crc32_test();
+ errors += crc32c_test();
+
+ return errors != 0;
+}
+#endif /* CRC32_SELFTEST */
diff --git a/libxfs/crc32defs.h b/libxfs/crc32defs.h
new file mode 100644
index 0000000..64cba2c
--- /dev/null
+++ b/libxfs/crc32defs.h
@@ -0,0 +1,72 @@
+/*
+ * There are multiple 16-bit CRC polynomials in common use, but this is
+ * *the* standard CRC-32 polynomial, first popularized by Ethernet.
+ * x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x^1+x^0
+ */
+#define CRCPOLY_LE 0xedb88320
+#define CRCPOLY_BE 0x04c11db7
+
+/*
+ * 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
+
+/* Try to choose an implementation variant via Kconfig */
+#ifdef CONFIG_CRC32_SLICEBY8
+# define CRC_LE_BITS 64
+# define CRC_BE_BITS 64
+#endif
+#ifdef CONFIG_CRC32_SLICEBY4
+# define CRC_LE_BITS 32
+# define CRC_BE_BITS 32
+#endif
+#ifdef CONFIG_CRC32_SARWATE
+# define CRC_LE_BITS 8
+# define CRC_BE_BITS 8
+#endif
+#ifdef CONFIG_CRC32_BIT
+# define CRC_LE_BITS 1
+# define CRC_BE_BITS 1
+#endif
+
+/*
+ * How many bits at a time to use. Valid values are 1, 2, 4, 8, 32 and 64.
+ * For less performance-sensitive, use 4 or 8 to save table size.
+ * For larger systems choose same as CPU architecture as default.
+ * This works well on X86_64, SPARC64 systems. This may require some
+ * elaboration after experiments with other architectures.
+ */
+#ifndef CRC_LE_BITS
+# ifdef CONFIG_64BIT
+# define CRC_LE_BITS 64
+# else
+# define CRC_LE_BITS 32
+# endif
+#endif
+#ifndef CRC_BE_BITS
+# ifdef CONFIG_64BIT
+# define CRC_BE_BITS 64
+# else
+# define CRC_BE_BITS 32
+# endif
+#endif
+
+/*
+ * 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
+
+/*
+ * Big-endian CRC computation. Used with serial bit streams sent
+ * msbit-first. Be sure to use cpu_to_be32() to append the computed CRC.
+ */
+#if CRC_BE_BITS > 64 || CRC_BE_BITS < 1 || CRC_BE_BITS == 16 || \
+ CRC_BE_BITS & CRC_BE_BITS-1
+# error "CRC_BE_BITS must be one of {1, 2, 4, 8, 32, 64}"
+#endif
diff --git a/libxfs/gen_crc32table.c b/libxfs/gen_crc32table.c
new file mode 100644
index 0000000..574a2d1
--- /dev/null
+++ b/libxfs/gen_crc32table.c
@@ -0,0 +1,144 @@
+#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
+
+#if CRC_BE_BITS > 8
+# define BE_TABLE_ROWS (CRC_BE_BITS/8)
+# define BE_TABLE_SIZE 256
+#else
+# define BE_TABLE_ROWS 1
+# define BE_TABLE_SIZE (1 << CRC_BE_BITS)
+#endif
+
+static uint32_t crc32table_le[LE_TABLE_ROWS][256];
+static uint32_t crc32ctable_le[LE_TABLE_ROWS][256];
+
+/*
+ * big endian ordered CRC not used by XFS.
+static uint32_t crc32table_be[BE_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 crc32init_le(void)
+{
+ crc32init_le_generic(CRCPOLY_LE, crc32table_le);
+}
+
+static void crc32cinit_le(void)
+{
+ crc32init_le_generic(CRC32C_POLY_LE, crc32ctable_le);
+}
+
+/**
+ * crc32init_be() - allocate and initialize BE table data
+ */
+#if 0 /* not used */
+static void crc32init_be(void)
+{
+ unsigned i, j;
+ uint32_t crc = 0x80000000;
+
+ crc32table_be[0][0] = 0;
+
+ for (i = 1; i < BE_TABLE_SIZE; i <<= 1) {
+ crc = (crc << 1) ^ ((crc & 0x80000000) ? CRCPOLY_BE : 0);
+ for (j = 0; j < i; j++)
+ crc32table_be[0][i + j] = crc ^ crc32table_be[0][j];
+ }
+ for (i = 0; i < BE_TABLE_SIZE; i++) {
+ crc = crc32table_be[0][i];
+ for (j = 1; j < BE_TABLE_ROWS; j++) {
+ crc = crc32table_be[0][(crc >> 24) & 0xff] ^ (crc << 8);
+ crc32table_be[j][i] = crc;
+ }
+ }
+}
+#endif
+
+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) {
+ crc32init_le();
+ printf("static u32 crc32table_le[%d][%d] = {",
+ LE_TABLE_ROWS, LE_TABLE_SIZE);
+ output_table(crc32table_le, LE_TABLE_ROWS,
+ LE_TABLE_SIZE, "tole");
+ printf("};\n");
+ }
+
+#if 0 /* not used by xfsprogs */
+ if (CRC_BE_BITS > 1) {
+ crc32init_be();
+ printf("static u32 crc32table_be[%d][%d] = {",
+ BE_TABLE_ROWS, BE_TABLE_SIZE);
+ output_table(crc32table_be, LE_TABLE_ROWS,
+ BE_TABLE_SIZE, "tobe");
+ printf("};\n");
+ }
+#endif
+ 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;
+}
--
1.7.10
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