836d13a6ef
Remove the public domain notices and add SPDX license identifiers. Change MODULE_LICENSE from "GPL" to "Dual BSD/GPL" because 0BSD should count as a BSD license variant here. The switch to 0BSD was done in the upstream XZ Embedded project because public domain has (real or perceived) legal issues in some jurisdictions. Link: https://lkml.kernel.org/r/20240721133633.47721-4-lasse.collin@tukaani.org Signed-off-by: Lasse Collin <lasse.collin@tukaani.org> Reviewed-by: Sam James <sam@gentoo.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Joel Stanley <joel@jms.id.au> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Jubin Zhong <zhongjubin@huawei.com> Cc: Jules Maselbas <jmaselbas@zdiv.net> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Rui Li <me@lirui.org> Cc: Simon Glass <sjg@chromium.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
/* SPDX-License-Identifier: 0BSD */
|
|
|
|
/*
|
|
* Definitions for handling the .xz file format
|
|
*
|
|
* Author: Lasse Collin <lasse.collin@tukaani.org>
|
|
*/
|
|
|
|
#ifndef XZ_STREAM_H
|
|
#define XZ_STREAM_H
|
|
|
|
#if defined(__KERNEL__) && !XZ_INTERNAL_CRC32
|
|
# include <linux/crc32.h>
|
|
# undef crc32
|
|
# define xz_crc32(buf, size, crc) \
|
|
(~crc32_le(~(uint32_t)(crc), buf, size))
|
|
#endif
|
|
|
|
/*
|
|
* See the .xz file format specification at
|
|
* https://tukaani.org/xz/xz-file-format.txt
|
|
* to understand the container format.
|
|
*/
|
|
|
|
#define STREAM_HEADER_SIZE 12
|
|
|
|
#define HEADER_MAGIC "\3757zXZ"
|
|
#define HEADER_MAGIC_SIZE 6
|
|
|
|
#define FOOTER_MAGIC "YZ"
|
|
#define FOOTER_MAGIC_SIZE 2
|
|
|
|
/*
|
|
* Variable-length integer can hold a 63-bit unsigned integer or a special
|
|
* value indicating that the value is unknown.
|
|
*
|
|
* Experimental: vli_type can be defined to uint32_t to save a few bytes
|
|
* in code size (no effect on speed). Doing so limits the uncompressed and
|
|
* compressed size of the file to less than 256 MiB and may also weaken
|
|
* error detection slightly.
|
|
*/
|
|
typedef uint64_t vli_type;
|
|
|
|
#define VLI_MAX ((vli_type)-1 / 2)
|
|
#define VLI_UNKNOWN ((vli_type)-1)
|
|
|
|
/* Maximum encoded size of a VLI */
|
|
#define VLI_BYTES_MAX (sizeof(vli_type) * 8 / 7)
|
|
|
|
/* Integrity Check types */
|
|
enum xz_check {
|
|
XZ_CHECK_NONE = 0,
|
|
XZ_CHECK_CRC32 = 1,
|
|
XZ_CHECK_CRC64 = 4,
|
|
XZ_CHECK_SHA256 = 10
|
|
};
|
|
|
|
/* Maximum possible Check ID */
|
|
#define XZ_CHECK_MAX 15
|
|
|
|
#endif
|