diff options
Diffstat (limited to 'lib/decompress.c')
| -rw-r--r-- | lib/decompress.c | 35 |
1 files changed, 23 insertions, 12 deletions
diff --git a/lib/decompress.c b/lib/decompress.c index 4d1cd0397aab..7785471586c6 100644 --- a/lib/decompress.c +++ b/lib/decompress.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * decompress.c * @@ -12,10 +13,12 @@ #include <linux/decompress/inflate.h> #include <linux/decompress/unlzo.h> #include <linux/decompress/unlz4.h> +#include <linux/decompress/unzstd.h> #include <linux/types.h> #include <linux/string.h> #include <linux/init.h> +#include <linux/printk.h> #ifndef CONFIG_DECOMPRESS_GZIP # define gunzip NULL @@ -35,6 +38,9 @@ #ifndef CONFIG_DECOMPRESS_LZ4 # define unlz4 NULL #endif +#ifndef CONFIG_DECOMPRESS_ZSTD +# define unzstd NULL +#endif struct compress_format { unsigned char magic[2]; @@ -43,29 +49,34 @@ struct compress_format { }; static const struct compress_format compressed_formats[] __initconst = { - { {037, 0213}, "gzip", gunzip }, - { {037, 0236}, "gzip", gunzip }, - { {0x42, 0x5a}, "bzip2", bunzip2 }, - { {0x5d, 0x00}, "lzma", unlzma }, - { {0xfd, 0x37}, "xz", unxz }, - { {0x89, 0x4c}, "lzo", unlzo }, - { {0x02, 0x21}, "lz4", unlz4 }, - { {0, 0}, NULL, NULL } + { .magic = {0x1f, 0x8b}, .name = "gzip", .decompressor = gunzip }, + { .magic = {0x1f, 0x9e}, .name = "gzip", .decompressor = gunzip }, + { .magic = {0x42, 0x5a}, .name = "bzip2", .decompressor = bunzip2 }, + { .magic = {0x5d, 0x00}, .name = "lzma", .decompressor = unlzma }, + { .magic = {0xfd, 0x37}, .name = "xz", .decompressor = unxz }, + { .magic = {0x89, 0x4c}, .name = "lzo", .decompressor = unlzo }, + { .magic = {0x02, 0x21}, .name = "lz4", .decompressor = unlz4 }, + { .magic = {0x28, 0xb5}, .name = "zstd", .decompressor = unzstd }, + { /* sentinel */ } }; -decompress_fn __init decompress_method(const unsigned char *inbuf, int len, +decompress_fn __init decompress_method(const unsigned char *inbuf, long len, const char **name) { const struct compress_format *cf; - if (len < 2) + if (len < 2) { + if (name) + *name = NULL; return NULL; /* Need at least this much... */ + } - for (cf = compressed_formats; cf->name; cf++) { + pr_debug("Compressed data magic: %#.2x %#.2x\n", inbuf[0], inbuf[1]); + + for (cf = compressed_formats; cf->name; cf++) if (!memcmp(inbuf, cf->magic, 2)) break; - } if (name) *name = cf->name; return cf->decompressor; |