[OE-core] [PATCH] support CONFIG_MODULE_COMPRESS=y

[Jens Rehsack]

In case, kernel config enables compressed modules, support of
splitting via split_kernel_module_packages won't find any module.
So, first expand module pattern regex to recognize compressed
modules and then objcopy on temporary extacted to extract module
information.

Signed-off-by: Jens Rehsack <sno at netbsd.org>
---
 meta/classes/kernel-module-split.bbclass | 36 +++++++++++++++++-------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/meta/classes/kernel-module-split.bbclass b/meta/classes/kernel-module-split.bbclass
index e8d3eb5105..61819dca99 100644
--- a/meta/classes/kernel-module-split.bbclass
+++ b/meta/classes/kernel-module-split.bbclass
@@ -1,31 +1,31 @@
 pkg_postinst_modules () {
 if [ -z "$D" ]; then
-	depmod -a ${KERNEL_VERSION}
+        depmod -a ${KERNEL_VERSION}
 else
-	# image.bbclass will call depmodwrapper after everything is installed,
-	# no need to do it here as well
-	:
+        # image.bbclass will call depmodwrapper after everything is installed,
+        # no need to do it here as well
+        :
 fi
 }
 
 pkg_postrm_modules () {
 if [ -z "$D" ]; then
-	depmod -a ${KERNEL_VERSION}
+        depmod -a ${KERNEL_VERSION}
 else
-	depmodwrapper -a -b $D ${KERNEL_VERSION}
+        depmodwrapper -a -b $D ${KERNEL_VERSION}
 fi
 }
 
 autoload_postinst_fragment() {
 if [ x"$D" = "x" ]; then
-	modprobe %s || true
+        modprobe %s || true
 fi
 }
 
 PACKAGE_WRITE_DEPS += "kmod-native depmodwrapper-cross"
 
 do_install_append() {
-	install -d ${D}${sysconfdir}/modules-load.d/ ${D}${sysconfdir}/modprobe.d/
+        install -d ${D}${sysconfdir}/modules-load.d/ ${D}${sysconfdir}/modprobe.d/
 }
 
 PACKAGESPLITFUNCS_prepend = "split_kernel_module_packages "
@@ -44,9 +44,23 @@ python split_kernel_module_packages () {
     def extract_modinfo(file):
         import tempfile, subprocess
         tempfile.tempdir = d.getVar("WORKDIR")
+        compressed = re.match( r'.*\.([xg])z$', file)
         tf = tempfile.mkstemp()
         tmpfile = tf[1]
-        cmd = "%sobjcopy -j .modinfo -O binary %s %s" % (d.getVar("HOST_PREFIX") or "", file, tmpfile)
+        if compressed:
+            tmpkofile = tmpfile + ".ko"
+            if compressed.group(1) == 'g':
+                cmd = "gunzip -dc %s > %s" % (file, tmpkofile)
+                subprocess.check_call(cmd, shell=True)
+            elif compressed.group(1) == 'x':
+                cmd = "xz -dc %s > %s" % (file, tmpkofile)
+                subprocess.check_call(cmd, shell=True)
+            else:
+                msg = "Cannot decompress '%s'" % file
+                raise msg
+            cmd = "%sobjcopy -j .modinfo -O binary %s %s" % (d.getVar("HOST_PREFIX") or "", tmpkofile, tmpfile)
+        else:
+            cmd = "%sobjcopy -j .modinfo -O binary %s %s" % (d.getVar("HOST_PREFIX") or "", file, tmpfile)
         subprocess.check_call(cmd, shell=True)
         # errors='replace': Some old kernel versions contain invalid utf-8 characters in mod descriptions (like 0xf6, 'ö')
         f = open(tmpfile, errors='replace')
@@ -54,6 +68,8 @@ python split_kernel_module_packages () {
         f.close()
         os.close(tf[0])
         os.unlink(tmpfile)
+        if compressed:
+            os.unlink(tmpkofile)
         vals = {}
         for i in l:
             m = modinfoexp.match(i)
@@ -133,7 +149,7 @@ python split_kernel_module_packages () {
     kernel_package_name = d.getVar("KERNEL_PACKAGE_NAME") or "kernel"
     kernel_version = d.getVar("KERNEL_VERSION")
 
-    module_regex = r'^(.*)\.k?o$'
+    module_regex = r'^(.*)\.k?o(?:\.[xg]z)?$'
 
     module_pattern_prefix = d.getVar('KERNEL_MODULE_PACKAGE_PREFIX')
     module_pattern_suffix = d.getVar('KERNEL_MODULE_PACKAGE_SUFFIX')
-- 
2.17.1