From 8538ef6a2caabe2b261903859754af32e4239346 Mon Sep 17 00:00:00 2001

From: "Richard W.M. Jones" <rjones@redhat.com>

Date: Tue, 13 Nov 2018 10:54:06 +0000

Subject: [PATCH 1/2] partitioning: Rename crc32 to efi_crc32 to avoid conflict

 with zlib.

zlib exports a symbol called crc32, which is also the name of our

EFI-specific CRC calculation function.  As a result if we link nbdkit

or the plugin with zlib (even indirectly) then we may end up using the

zlib symbol, which causes a segmentation fault.  Renaming our function

avoids this.  I also renamed the source files to make the name less

generic, since this function really only works for EFI CRCs, not for

general CRCs.

This only affects RHEL 7.  I believe that's because Fedora uses a flag

such as --as-needed or similar.

(cherry picked from commit fc789b9c3a9d0b6b4b0ae63a08ea34a70e0ea8db)

---

 plugins/partitioning/Makefile.am     |   4 +-

 plugins/partitioning/crc32.c         | 140 -----------------------------------

 plugins/partitioning/crc32.h         |  41 ----------

 plugins/partitioning/efi-crc32.c     | 140 +++++++++++++++++++++++++++++++++++

 plugins/partitioning/efi-crc32.h     |  41 ++++++++++

 plugins/partitioning/partition-gpt.c |   6 +-

 6 files changed, 186 insertions(+), 186 deletions(-)

 delete mode 100644 plugins/partitioning/crc32.c

 delete mode 100644 plugins/partitioning/crc32.h

 create mode 100644 plugins/partitioning/efi-crc32.c

 create mode 100644 plugins/partitioning/efi-crc32.h

diff --git a/plugins/partitioning/Makefile.am b/plugins/partitioning/Makefile.am

index bc768be..8519bda 100644

--- a/plugins/partitioning/Makefile.am

+++ b/plugins/partitioning/Makefile.am

@@ -37,8 +37,8 @@ EXTRA_DIST = nbdkit-partitioning-plugin.pod

 plugin_LTLIBRARIES = nbdkit-partitioning-plugin.la

 nbdkit_partitioning_plugin_la_SOURCES = \

-	crc32.c \

-	crc32.h \

+	efi-crc32.c \

+	efi-crc32.h \

 	partitioning.c \

 	partition-gpt.c \

 	partition-mbr.c \

diff --git a/plugins/partitioning/crc32.c b/plugins/partitioning/crc32.c

deleted file mode 100644

index e707a50..0000000

--- a/plugins/partitioning/crc32.c

+++ /dev/null

@@ -1,140 +0,0 @@

-/* This code was taken from parted and indirectly from other sources

- * as you can see from the messages below.  The license is compatible

- * with the permissive license used in nbdkit.  - RWMJ 2018-09-16

- */

-

-/*

- * Dec 5, 2000 Matt Domsch <Matt_Domsch@dell.com>

- * - Copied crc32.c from the linux/drivers/net/cipe directory.

- * - Now pass seed as an arg

- * - changed unsigned long to uint32_t, added #include<stdint.h>

- * - changed len to be an unsigned long

- * - changed crc32val to be a register

- * - License remains unchanged!  It's still GPL-compatable!

- */

-

-  /* ============================================================= */

-  /*  COPYRIGHT (C) 1986 Gary S. Brown.  You may use this program, or       */

-  /*  code or tables extracted from it, as desired without restriction.     */

-  /*                                                                        */

-  /*  First, the polynomial itself and its table of feedback terms.  The    */

-  /*  polynomial is                                                         */

-  /*  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   */

-  /*                                                                        */

-  /*  Note that we take it "backwards" and put the highest-order term in    */

-  /*  the lowest-order bit.  The X^32 term is "implied"; the LSB is the     */

-  /*  X^31 term, etc.  The X^0 term (usually shown as "+1") results in      */

-  /*  the MSB being 1.                                                      */

-  /*                                                                        */

-  /*  Note that the usual hardware shift register implementation, which     */

-  /*  is what we're using (we're merely optimizing it by doing eight-bit    */

-  /*  chunks at a time) shifts bits into the lowest-order term.  In our     */

-  /*  implementation, that means shifting towards the right.  Why do we     */

-  /*  do it this way?  Because the calculated CRC must be transmitted in    */

-  /*  order from highest-order term to lowest-order term.  UARTs transmit   */

-  /*  characters in order from LSB to MSB.  By storing the CRC this way,    */

-  /*  we hand it to the UART in the order low-byte to high-byte; the UART   */

-  /*  sends each low-bit to hight-bit; and the result is transmission bit   */

-  /*  by bit from highest- to lowest-order term without requiring any bit   */

-  /*  shuffling on our part.  Reception works similarly.                    */

-  /*                                                                        */

-  /*  The feedback terms table consists of 256, 32-bit entries.  Notes:     */

-  /*                                                                        */

-  /*      The table can be generated at runtime if desired; code to do so   */

-  /*      is shown later.  It might not be obvious, but the feedback        */

-  /*      terms simply represent the results of eight shift/xor opera-      */

-  /*      tions for all combinations of data and CRC register values.       */

-  /*                                                                        */

-  /*      The values must be right-shifted by eight bits by the "updcrc"    */

-  /*      logic; the shift must be unsigned (bring in zeroes).  On some     */

-  /*      hardware you could probably optimize the shift in assembler by    */

-  /*      using byte-swap instructions.                                     */

-  /*      polynomial $edb88320                                              */

-  /*                                                                        */

-  /*  --------------------------------------------------------------------  */

-

-#include <config.h>

-

-#include <stdio.h>

-#include <stdint.h>

-

-#include "crc32.h"

-

-static const uint32_t crc32_tab[] = {

-      0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,

-      0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,

-      0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,

-      0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,

-      0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,

-      0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,

-      0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,

-      0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,

-      0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,

-      0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,

-      0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,

-      0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,

-      0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,

-      0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,

-      0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,

-      0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,

-      0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,

-      0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,

-      0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,

-      0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,

-      0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,

-      0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,

-      0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,

-      0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,

-      0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,

-      0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,

-      0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,

-      0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,

-      0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,

-      0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,

-      0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,

-      0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,

-      0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,

-      0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,

-      0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,

-      0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,

-      0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,

-      0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,

-      0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,

-      0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,

-      0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,

-      0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,

-      0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,

-      0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,

-      0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,

-      0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,

-      0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,

-      0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,

-      0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,

-      0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,

-      0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,

-      0x2d02ef8dL

-   };

-

-/* Return a 32-bit CRC of the contents of the buffer. */

-

-static uint32_t

-efi_crc32 (const void *buf, size_t len, uint32_t seed)

-{

-  size_t i;

-  uint32_t crc32val;

-  const unsigned char *s = buf;

-

-  crc32val = seed;

-  for (i = 0;  i < len;  i++) {

-    crc32val =

-      crc32_tab[(crc32val ^ s[i]) & 0xff] ^

-      (crc32val >> 8);

-  }

-  return crc32val;

-}

-

-uint32_t

-crc32 (const void *buf, size_t len)

-{

-  return efi_crc32 (buf, len, ~0L) ^ ~0L;

-}

diff --git a/plugins/partitioning/crc32.h b/plugins/partitioning/crc32.h

deleted file mode 100644

index 6bd5d2d..0000000

--- a/plugins/partitioning/crc32.h

+++ /dev/null

@@ -1,41 +0,0 @@

-/* nbdkit

- * Copyright (C) 2018 Red Hat Inc.

- * 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 Red Hat 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 RED HAT 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 RED HAT 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 NBDKIT_CRC32_H

-#define NBDKIT_CRC32_H

-

-#include <stdint.h>

-

-extern uint32_t crc32 (const void *buf, size_t len);

-

-#endif /* NBDKIT_CRC32_H */

diff --git a/plugins/partitioning/efi-crc32.c b/plugins/partitioning/efi-crc32.c

new file mode 100644

index 0000000..2b080d3

--- /dev/null

+++ b/plugins/partitioning/efi-crc32.c

@@ -0,0 +1,140 @@

+/* This code was taken from parted and indirectly from other sources

+ * as you can see from the messages below.  The license is compatible

+ * with the permissive license used in nbdkit.  - RWMJ 2018-09-16

+ */

+

+/*

+ * Dec 5, 2000 Matt Domsch <Matt_Domsch@dell.com>

+ * - Copied crc32.c from the linux/drivers/net/cipe directory.

+ * - Now pass seed as an arg

+ * - changed unsigned long to uint32_t, added #include<stdint.h>

+ * - changed len to be an unsigned long

+ * - changed crc32val to be a register

+ * - License remains unchanged!  It's still GPL-compatable!

+ */

+

+  /* ============================================================= */

+  /*  COPYRIGHT (C) 1986 Gary S. Brown.  You may use this program, or       */

+  /*  code or tables extracted from it, as desired without restriction.     */

+  /*                                                                        */

+  /*  First, the polynomial itself and its table of feedback terms.  The    */

+  /*  polynomial is                                                         */

+  /*  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   */

+  /*                                                                        */

+  /*  Note that we take it "backwards" and put the highest-order term in    */

+  /*  the lowest-order bit.  The X^32 term is "implied"; the LSB is the     */

+  /*  X^31 term, etc.  The X^0 term (usually shown as "+1") results in      */

+  /*  the MSB being 1.                                                      */

+  /*                                                                        */

+  /*  Note that the usual hardware shift register implementation, which     */

+  /*  is what we're using (we're merely optimizing it by doing eight-bit    */

+  /*  chunks at a time) shifts bits into the lowest-order term.  In our     */

+  /*  implementation, that means shifting towards the right.  Why do we     */

+  /*  do it this way?  Because the calculated CRC must be transmitted in    */

+  /*  order from highest-order term to lowest-order term.  UARTs transmit   */

+  /*  characters in order from LSB to MSB.  By storing the CRC this way,    */

+  /*  we hand it to the UART in the order low-byte to high-byte; the UART   */

+  /*  sends each low-bit to hight-bit; and the result is transmission bit   */

+  /*  by bit from highest- to lowest-order term without requiring any bit   */

+  /*  shuffling on our part.  Reception works similarly.                    */

+  /*                                                                        */

+  /*  The feedback terms table consists of 256, 32-bit entries.  Notes:     */

+  /*                                                                        */

+  /*      The table can be generated at runtime if desired; code to do so   */

+  /*      is shown later.  It might not be obvious, but the feedback        */

+  /*      terms simply represent the results of eight shift/xor opera-      */

+  /*      tions for all combinations of data and CRC register values.       */

+  /*                                                                        */

+  /*      The values must be right-shifted by eight bits by the "updcrc"    */

+  /*      logic; the shift must be unsigned (bring in zeroes).  On some     */

+  /*      hardware you could probably optimize the shift in assembler by    */

+  /*      using byte-swap instructions.                                     */

+  /*      polynomial $edb88320                                              */

+  /*                                                                        */

+  /*  --------------------------------------------------------------------  */

+

+#include <config.h>

+

+#include <stdio.h>

+#include <stdint.h>

+

+#include "efi-crc32.h"

+

+static const uint32_t crc32_tab[] = {

+      0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,

+      0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,

+      0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,

+      0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,

+      0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,

+      0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,

+      0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,

+      0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,

+      0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,

+      0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,

+      0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,

+      0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,

+      0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,

+      0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,

+      0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,

+      0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,

+      0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,

+      0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,

+      0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,

+      0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,

+      0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,

+      0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,

+      0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,

+      0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,

+      0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,

+      0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,

+      0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,

+      0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,

+      0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,

+      0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,

+      0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,

+      0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,

+      0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,

+      0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,

+      0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,

+      0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,

+      0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,

+      0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,

+      0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,

+      0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,

+      0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,

+      0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,

+      0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,

+      0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,

+      0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,

+      0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,

+      0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,

+      0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,

+      0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,

+      0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,

+      0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,

+      0x2d02ef8dL

+   };

+

+/* Return a 32-bit CRC of the contents of the buffer. */

+

+static uint32_t

+_efi_crc32 (const void *buf, size_t len, uint32_t seed)

+{

+  size_t i;

+  uint32_t crc32val;

+  const unsigned char *s = buf;

+

+  crc32val = seed;

+  for (i = 0;  i < len;  i++) {

+    crc32val =

+      crc32_tab[(crc32val ^ s[i]) & 0xff] ^

+      (crc32val >> 8);

+  }

+  return crc32val;

+}

+

+uint32_t

+efi_crc32 (const void *buf, size_t len)

+{

+  return _efi_crc32 (buf, len, ~0L) ^ ~0L;

+}

diff --git a/plugins/partitioning/efi-crc32.h b/plugins/partitioning/efi-crc32.h

new file mode 100644

index 0000000..76f5a6a

--- /dev/null

+++ b/plugins/partitioning/efi-crc32.h

@@ -0,0 +1,41 @@

+/* nbdkit

+ * Copyright (C) 2018 Red Hat Inc.

+ * 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 Red Hat 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 RED HAT 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 RED HAT 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 NBDKIT_EFI_CRC32_H

+#define NBDKIT_EFI_CRC32_H

+

+#include <stdint.h>

+

+extern uint32_t efi_crc32 (const void *buf, size_t len);

+

+#endif /* NBDKIT_EFI_CRC32_H */

diff --git a/plugins/partitioning/partition-gpt.c b/plugins/partitioning/partition-gpt.c

index 14a58ad..5fb7602 100644

--- a/plugins/partitioning/partition-gpt.c

+++ b/plugins/partitioning/partition-gpt.c

@@ -44,7 +44,7 @@

 #include "byte-swapping.h"

-#include "crc32.h"

+#include "efi-crc32.h"

 #include "regions.h"

 #include "virtual-disk.h"

@@ -121,10 +121,10 @@ create_gpt_partition_header (const void *pt, int is_primary,

   header->nr_partition_entries = htole32 (GPT_PTA_SIZE);

   header->size_partition_entry = htole32 (GPT_PT_ENTRY_SIZE);

   header->crc_partitions =

-    htole32 (crc32 (pt, GPT_PT_ENTRY_SIZE * GPT_PTA_SIZE));

+    htole32 (efi_crc32 (pt, GPT_PT_ENTRY_SIZE * GPT_PTA_SIZE));

   /* Must be computed last. */

-  header->crc = htole32 (crc32 (header, sizeof *header));

+  header->crc = htole32 (efi_crc32 (header, sizeof *header));

 }

 static void

-- 

1.8.3.1