From: Stefan Herbrechtsmeier stefan.herbrechtsmeier@weidmueller.com
Remove header from compressed data because this is uncommon, not supported by U-Boot and incompatible with external compressed artifacts.
The header was introduced as part of commit eb0f4a4cb402 ("binman: Support replacing data in a cbfs") to allow device tree entries to be larger that the compressed contents. Regarding the commit "this is necessary to cope with a compressed device tree being updated in such a way that it shrinks after the entry size is already set (an obscure case)". This case need to be fixed without influence the compressed data by itself.
Signed-off-by: Stefan Herbrechtsmeier stefan.herbrechtsmeier@weidmueller.com
---
tools/binman/cbfs_util.py | 8 ++++---- tools/binman/comp_util.py | 11 ++--------- tools/binman/entry.py | 2 +- 3 files changed, 7 insertions(+), 14 deletions(-)
diff --git a/tools/binman/cbfs_util.py b/tools/binman/cbfs_util.py index 9cad03886f..a1836f4ad3 100644 --- a/tools/binman/cbfs_util.py +++ b/tools/binman/cbfs_util.py @@ -241,9 +241,9 @@ class CbfsFile(object): """Handle decompressing data if necessary""" indata = self.data if self.compress == COMPRESS_LZ4: - data = comp_util.decompress(indata, 'lz4', with_header=False) + data = comp_util.decompress(indata, 'lz4') elif self.compress == COMPRESS_LZMA: - data = comp_util.decompress(indata, 'lzma', with_header=False) + data = comp_util.decompress(indata, 'lzma') else: data = indata self.memlen = len(data) @@ -362,9 +362,9 @@ class CbfsFile(object): elif self.ftype == TYPE_RAW: orig_data = data if self.compress == COMPRESS_LZ4: - data = comp_util.compress(orig_data, 'lz4', with_header=False) + data = comp_util.compress(orig_data, 'lz4') elif self.compress == COMPRESS_LZMA: - data = comp_util.compress(orig_data, 'lzma', with_header=False) + data = comp_util.compress(orig_data, 'lzma') self.memlen = len(orig_data) self.data_len = len(data) attr = struct.pack(ATTR_COMPRESSION_FORMAT, diff --git a/tools/binman/comp_util.py b/tools/binman/comp_util.py index dc76adab35..269bbf7975 100644 --- a/tools/binman/comp_util.py +++ b/tools/binman/comp_util.py @@ -3,7 +3,6 @@ # """Utilities to compress and decompress data"""
-import struct import tempfile
from binman import bintool @@ -16,7 +15,7 @@ LZMA_ALONE = bintool.Bintool.create('lzma_alone') HAVE_LZMA_ALONE = LZMA_ALONE.is_present()
-def compress(indata, algo, with_header=True): +def compress(indata, algo): """Compress some data using a given algorithm
Note that for lzma this uses an old version of the algorithm, not that @@ -41,12 +40,9 @@ def compress(indata, algo, with_header=True): data = LZMA_ALONE.compress(indata) else: raise ValueError("Unknown algorithm '%s'" % algo) - if with_header: - hdr = struct.pack('<I', len(data)) - data = hdr + data return data
-def decompress(indata, algo, with_header=True): +def decompress(indata, algo): """Decompress some data using a given algorithm
Note that for lzma this uses an old version of the algorithm, not that @@ -64,9 +60,6 @@ def decompress(indata, algo, with_header=True): """ if algo == 'none': return indata - if with_header: - data_len = struct.unpack('<I', indata[:4])[0] - indata = indata[4:4 + data_len] if algo == 'lz4': data = LZ4.decompress(indata) elif algo == 'lzma': diff --git a/tools/binman/entry.py b/tools/binman/entry.py index a07a588864..8cbfd43af9 100644 --- a/tools/binman/entry.py +++ b/tools/binman/entry.py @@ -1069,7 +1069,7 @@ features to produce new behaviours. indata: Data to compress
Returns: - Compressed data (first word is the compressed size) + Compressed data """ self.uncomp_data = indata if self.compress != 'none':