From 7eec2b56f54c778d5bd6e7aea49ee03e3b76e769 Mon Sep 17 00:00:00 2001

From: Peter Robinson <pbrobinson@gmail.com>

Date: Fri, 22 Jan 2021 20:36:23 +0000

Subject: [PATCH v2] Add support for compressing firmware in copy-firmware.sh

As of kernel 5.3 there's initial support for loading compressed firmware.

At this stage the only supported compression methis is "xz -C crc32" but

this option brings significant benefits.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>

---

v2: quote filename for xz command

 Makefile         |  4 ++++

 copy-firmware.sh | 47 +++++++++++++++++++++++++++++++----------------

 2 files changed, 35 insertions(+), 16 deletions(-)

diff --git a/Makefile b/Makefile

index e1c362f..9a48471 100644

--- a/Makefile

+++ b/Makefile

@@ -11,3 +11,7 @@ check:

 install:

 	mkdir -p $(DESTDIR)$(FIRMWAREDIR)

 	./copy-firmware.sh $(DESTDIR)$(FIRMWAREDIR)

+

+installcompress:

+	mkdir -p $(DESTDIR)$(FIRMWAREDIR)

+	./copy-firmware.sh -C $(DESTDIR)$(FIRMWAREDIR)

diff --git a/copy-firmware.sh b/copy-firmware.sh

index 9b46b63..0dd2e5c 100755

--- a/copy-firmware.sh

+++ b/copy-firmware.sh

@@ -6,6 +6,7 @@

 verbose=:

 prune=no

+compress=no

 while test $# -gt 0; do

     case $1 in

@@ -19,6 +20,11 @@ while test $# -gt 0; do

             shift

             ;;

+        -C | --compress)

+            compress=yes

+            shift

+            ;;

+

         *)

             if test "x$destdir" != "x"; then

                 echo "ERROR: unknown command-line options: $@"

@@ -31,40 +37,49 @@ while test $# -gt 0; do

     esac

 done

+if test "x$compress" = "xyes"; then

+    cmpxtn=.xz

+    grep '^File:' WHENCE | sed -e's/^File: *//g' -e's/"//g' | while read f; do

+       test -f "$f" || continue

+       $verbose "compressing $f"

+       xz -C crc32 "$f"

+    done

+fi

+

 grep '^File:' WHENCE | sed -e's/^File: *//g' -e's/"//g' | while read f; do

-    test -f "$f" || continue

-    $verbose "copying file $f"

-    mkdir -p $destdir/$(dirname "$f")

-    cp -d "$f" $destdir/"$f"

+    test -f "$f$cmpxtn" || continue

+    $verbose "copying file $f$cmpxtn"

+    mkdir -p $destdir/$(dirname "$f$cmpxtn")

+    cp -d "$f$cmpxtn" $destdir/"$f$cmpxtn"

 done

 grep -E '^Link:' WHENCE | sed -e's/^Link: *//g' -e's/-> //g' | while read f d; do

-    if test -L "$f"; then

-        test -f "$destdir/$f" && continue

-        $verbose "copying link $f"

-        mkdir -p $destdir/$(dirname "$f")

+    if test -L "$f$cmpxtn"; then

+        test -f "$destdir/$f$cmpxtn" && continue

+        $verbose "copying link $f$cmpxtn"

+        mkdir -p $destdir/$(dirname "$f$cmpxtn")

         cp -d "$f" $destdir/"$f"

         if test "x$d" != "x"; then

-            target=`readlink "$f"`

+            target=`readlink "$f$cmpxtn"`

             if test "x$target" != "x$d"; then

                 $verbose "WARNING: inconsistent symlink target: $target != $d"

             else

                 if test "x$prune" != "xyes"; then

-                    $verbose "WARNING: unneeded symlink detected: $f"

+                    $verbose "WARNING: unneeded symlink detected: $f$cmpxtn"

                 else

-                    $verbose "WARNING: pruning unneeded symlink $f"

-                    rm -f "$f"

+                    $verbose "WARNING: pruning unneeded symlink $f$cmpxtn"

+                    rm -f "$f$cmpxtn"

                 fi

             fi

         else

-            $verbose "WARNING: missing target for symlink $f"

+            $verbose "WARNING: missing target for symlink $f$cmpxtn"

         fi

     else

-        $verbose "creating link $f -> $d"

-        mkdir -p $destdir/$(dirname "$f")

-        ln -sf "$d" "$destdir/$f"

+        $verbose "creating link $f$cmpxtn -> $d$cmpxtn"

+        mkdir -p $destdir/$(dirname "$f$cmpxtn")

+        ln -sf "$d$cmpxtn" "$destdir/$f$cmpxtn"

     fi

 done

-- 

2.29.2