handle don't care regions in the system image
The system partitions has regions that we shouldn't write and can't
depend on the contents of. Adds a new script to generate a map of
these regions (using the sparse image as input), and include the map
in the package zip so it can be used when writing or patching the
system partition.
Also fixes a bug where the wrong SELinux file contexts are used when
generating incrementals.
Change-Id: Iaca5b967a3b7d1df843c7c21becc19b3f1633dad
diff --git a/tools/releasetools/edify_generator.py b/tools/releasetools/edify_generator.py
index 7978062..af545db 100644
--- a/tools/releasetools/edify_generator.py
+++ b/tools/releasetools/edify_generator.py
@@ -190,6 +190,16 @@
(p.fs_type, common.PARTITION_TYPES[p.fs_type],
p.device, p.length, p.mount_point))
+ def WipeBlockDevice(self, partition):
+ if partition != "/system":
+ raise ValueError(("WipeBlockDevice currently only works "
+ "on /system, not %s\n") % (partition,))
+ fstab = self.info.get("fstab", None)
+ size = self.info.get("system_size", None)
+ device = fstab[partition].device
+
+ self.script.append('wipe_block_device("%s", %s);' % (device, size))
+
def DeleteFiles(self, file_list):
"""Delete all files in file_list."""
if not file_list: return
@@ -224,7 +234,7 @@
cmd = "".join(cmd)
self.script.append(self._WordWrap(cmd))
- def WriteRawImage(self, mount_point, fn):
+ def WriteRawImage(self, mount_point, fn, mapfn=None):
"""Write the given package file into the partition for the given
mount point."""
@@ -238,8 +248,13 @@
'write_raw_image(package_extract_file("%(fn)s"), "%(device)s");'
% args)
elif partition_type == "EMMC":
- self.script.append(
- 'package_extract_file("%(fn)s", "%(device)s");' % args)
+ if mapfn:
+ args["map"] = mapfn
+ self.script.append(
+ 'package_extract_file("%(fn)s", "%(device)s", "%(map)s");' % args)
+ else:
+ self.script.append(
+ 'package_extract_file("%(fn)s", "%(device)s");' % args)
else:
raise ValueError("don't know how to write \"%s\" partitions" % (p.fs_type,))
@@ -309,7 +324,9 @@
common.ZipWriteStr(output_zip, "META-INF/com/google/android/update-binary",
data, perms=0755)
- def Syspatch(self, filename, size, target_sha, source_sha, patchfile):
+ def Syspatch(self, filename, target_mapfile, target_sha,
+ source_mapfile, source_sha, patchfile):
"""Applies a compressed binary patch to a block device."""
- call = 'syspatch("%s", "%s", "%s", "%s", "%s");'
- self.script.append(call % (filename, size, target_sha, source_sha, patchfile))
+ call = 'syspatch("%s", "%s", "%s", "%s", "%s", "%s");'
+ self.script.append(call % (filename, target_mapfile, target_sha,
+ source_mapfile, source_sha, patchfile))