[U-Boot] [PATCH 44/53] binman: Support replacing data in a cbfs
Simon Glass
sjg at chromium.org
Sat Jul 20 18:24:06 UTC 2019
At present binman cannot replace data within a CBFS since it does not
allow rewriting of the files in that CBFS. Implement this by using the
new WriteData() method to handle the case.
Add a header to compressed data so that the amount of compressed data can
be determined without reference to the size of the containing entry. This
allows the entry to be larger that the contents, without causing errors in
decompression. 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). It is not used with CBFS since it has its
own metadata for this. Increase the number of passes allowed to resolve
the position of entries, to handle this case.
Add a test for this new logic.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
tools/binman/cbfs_util.py | 10 ++++---
tools/binman/control.py | 2 +-
tools/binman/entry_test.py | 5 ++++
tools/binman/etype/cbfs.py | 3 ++-
tools/binman/ftest.py | 26 +++++++++++++++++-
tools/binman/test/142_replace_cbfs.dts | 37 ++++++++++++++++++++++++++
tools/patman/tools.py | 11 ++++++--
7 files changed, 85 insertions(+), 9 deletions(-)
create mode 100644 tools/binman/test/142_replace_cbfs.dts
diff --git a/tools/binman/cbfs_util.py b/tools/binman/cbfs_util.py
index 6d9a876ee85..99d77878c9a 100644
--- a/tools/binman/cbfs_util.py
+++ b/tools/binman/cbfs_util.py
@@ -208,6 +208,7 @@ class CbfsFile(object):
cbfs_offset: Offset of file data in bytes from start of CBFS, or None to
place this file anyway
data: Contents of file, uncompressed
+ orig_data: Original data added to the file, possibly compressed
data_len: Length of (possibly compressed) data in bytes
ftype: File type (TYPE_...)
compression: Compression type (COMPRESS_...)
@@ -226,6 +227,7 @@ class CbfsFile(object):
self.offset = None
self.cbfs_offset = cbfs_offset
self.data = data
+ self.orig_data = data
self.ftype = ftype
self.compress = compress
self.memlen = None
@@ -240,9 +242,9 @@ class CbfsFile(object):
"""Handle decompressing data if necessary"""
indata = self.data
if self.compress == COMPRESS_LZ4:
- data = tools.Decompress(indata, 'lz4')
+ data = tools.Decompress(indata, 'lz4', with_header=False)
elif self.compress == COMPRESS_LZMA:
- data = tools.Decompress(indata, 'lzma')
+ data = tools.Decompress(indata, 'lzma', with_header=False)
else:
data = indata
self.memlen = len(data)
@@ -361,9 +363,9 @@ class CbfsFile(object):
elif self.ftype == TYPE_RAW:
orig_data = data
if self.compress == COMPRESS_LZ4:
- data = tools.Compress(orig_data, 'lz4')
+ data = tools.Compress(orig_data, 'lz4', with_header=False)
elif self.compress == COMPRESS_LZMA:
- data = tools.Compress(orig_data, 'lzma')
+ data = tools.Compress(orig_data, 'lzma', with_header=False)
self.memlen = len(orig_data)
self.data_len = len(data)
attr = struct.pack(ATTR_COMPRESSION_FORMAT,
diff --git a/tools/binman/control.py b/tools/binman/control.py
index 22e3e306e54..9c8bc6253fc 100644
--- a/tools/binman/control.py
+++ b/tools/binman/control.py
@@ -311,7 +311,7 @@ def ProcessImage(image, update_fdt, write_map, get_contents=True,
# since changing an offset from 0x100 to 0x104 (for example) can
# alter the compressed size of the device tree. So we need a
# third pass for this.
- passes = 3
+ passes = 5
for pack_pass in range(passes):
try:
image.PackEntries()
diff --git a/tools/binman/entry_test.py b/tools/binman/entry_test.py
index ee729f37519..cc1fb795da5 100644
--- a/tools/binman/entry_test.py
+++ b/tools/binman/entry_test.py
@@ -92,6 +92,11 @@ class TestEntry(unittest.TestCase):
dtb = entry.Entry.Create(None, self.GetNode(), 'u-boot-dtb')
self.assertEqual('u-boot-dtb', dtb.GetFdtEtype())
+ def testWriteChildData(self):
+ """Test the WriteChildData() method of the base class"""
+ base = entry.Entry.Create(None, self.GetNode(), 'blob-dtb')
+ self.assertTrue(base.WriteChildData(base))
+
if __name__ == "__main__":
unittest.main()
diff --git a/tools/binman/etype/cbfs.py b/tools/binman/etype/cbfs.py
index 0109fdbb918..28a9c81a8ad 100644
--- a/tools/binman/etype/cbfs.py
+++ b/tools/binman/etype/cbfs.py
@@ -168,6 +168,7 @@ class Entry_cbfs(Entry):
self._cbfs_arg = fdt_util.GetString(node, 'cbfs-arch', 'x86')
self._cbfs_entries = OrderedDict()
self._ReadSubnodes()
+ self.reader = None
def ObtainContents(self, skip=None):
arch = cbfs_util.find_arch(self._cbfs_arg)
@@ -202,7 +203,7 @@ class Entry_cbfs(Entry):
def _ReadSubnodes(self):
"""Read the subnodes to find out what should go in this IFWI"""
for node in self._node.subnodes:
- entry = Entry.Create(self.section, node)
+ entry = Entry.Create(self, node)
entry.ReadNode()
entry._cbfs_name = fdt_util.GetString(node, 'cbfs-name', entry.name)
entry._type = fdt_util.GetString(node, 'cbfs-type')
diff --git a/tools/binman/ftest.py b/tools/binman/ftest.py
index d1ecd65c2c3..12e32a0b5de 100644
--- a/tools/binman/ftest.py
+++ b/tools/binman/ftest.py
@@ -2485,7 +2485,7 @@ class TestFunctional(unittest.TestCase):
def testExtractCbfsRaw(self):
"""Test extracting CBFS compressed data without decompressing it"""
data = self._RunExtractCmd('section/cbfs/u-boot-dtb', decomp=False)
- dtb = tools.Decompress(data, 'lzma')
+ dtb = tools.Decompress(data, 'lzma', with_header=False)
self.assertEqual(EXTRACT_DTB_SIZE, len(dtb))
def testExtractBadEntry(self):
@@ -2984,6 +2984,30 @@ class TestFunctional(unittest.TestCase):
self.assertEqual(0xff800000, desc.offset);
self.assertEqual(0xff800000, desc.image_pos);
+ def testReplaceCbfs(self):
+ """Test replacing a single file in CBFS without changing the size"""
+ expected = b'x' * len(U_BOOT_DATA)
+ data = self._DoReadFileRealDtb('142_replace_cbfs.dts')
+ updated_fname = tools.GetOutputFilename('image-updated.bin')
+ tools.WriteFile(updated_fname, data)
+ entry_name = 'section/cbfs/u-boot'
+ control.WriteEntry(updated_fname, entry_name, expected,
+ allow_resize=True)
+ data = control.ReadEntry(updated_fname, entry_name)
+ self.assertEqual(expected, data)
+
+ def testReplaceResizeCbfs(self):
+ """Test replacing a single file in CBFS with one of a different size"""
+ expected = U_BOOT_DATA + b'x'
+ data = self._DoReadFileRealDtb('142_replace_cbfs.dts')
+ updated_fname = tools.GetOutputFilename('image-updated.bin')
+ tools.WriteFile(updated_fname, data)
+ entry_name = 'section/cbfs/u-boot'
+ control.WriteEntry(updated_fname, entry_name, expected,
+ allow_resize=True)
+ data = control.ReadEntry(updated_fname, entry_name)
+ self.assertEqual(expected, data)
+
if __name__ == "__main__":
unittest.main()
diff --git a/tools/binman/test/142_replace_cbfs.dts b/tools/binman/test/142_replace_cbfs.dts
new file mode 100644
index 00000000000..d64142f9d5c
--- /dev/null
+++ b/tools/binman/test/142_replace_cbfs.dts
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/dts-v1/;
+
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ binman {
+ size = <0xe00>;
+ allow-repack;
+ u-boot {
+ };
+ section {
+ align = <0x100>;
+ cbfs {
+ size = <0x400>;
+ u-boot {
+ cbfs-type = "raw";
+ };
+ u-boot-dtb {
+ cbfs-type = "raw";
+ cbfs-compress = "lzma";
+ cbfs-offset = <0x80>;
+ };
+ };
+ u-boot-dtb {
+ compress = "lz4";
+ };
+ };
+ fdtmap {
+ };
+ image-header {
+ location = "end";
+ };
+ };
+};
diff --git a/tools/patman/tools.py b/tools/patman/tools.py
index f492dc8f8e3..d615227482a 100644
--- a/tools/patman/tools.py
+++ b/tools/patman/tools.py
@@ -9,6 +9,7 @@ import command
import glob
import os
import shutil
+import struct
import sys
import tempfile
@@ -377,7 +378,7 @@ def ToBytes(string):
return string.encode('utf-8')
return string
-def Compress(indata, algo):
+def Compress(indata, algo, with_header=True):
"""Compress some data using a given algorithm
Note that for lzma this uses an old version of the algorithm, not that
@@ -408,9 +409,12 @@ def Compress(indata, algo):
data = Run('gzip', '-c', fname, binary=True)
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):
+def Decompress(indata, algo, with_header=True):
"""Decompress some data using a given algorithm
Note that for lzma this uses an old version of the algorithm, not that
@@ -428,6 +432,9 @@ def Decompress(indata, algo):
"""
if algo == 'none':
return indata
+ if with_header:
+ data_len = struct.unpack('<I', indata[:4])[0]
+ indata = indata[4:4 + data_len]
fname = GetOutputFilename('%s.decomp.tmp' % algo)
with open(fname, 'wb') as fd:
fd.write(indata)
--
2.22.0.657.g960e92d24f-goog
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