image: increase squashfs block size - visibly reduces image size in many cases

[openwrt.git] / include / image.mk

diff --git a/include/image.mk b/include/image.mk
index 29328b3..473e391 100644 (file)
--- a/include/image.mk
+++ b/include/image.mk
@@ -42,23 +42,26 @@ ifneq ($(CONFIG_JFFS2_LZMA),y)
   JFFS2OPTS += -x lzma
 endif
 
+SQUASHFS_BLOCKSIZE := 256k
+SQUASHFSOPT := -b $(SQUASHFS_BLOCKSIZE)
+SQUASHFSCOMP := gzip
+LZMA_XZ_OPTIONS := -Xpreset 9 -Xe -Xlc 0 -Xlp 2 -Xpb 2
+ifeq ($(CONFIG_SQUASHFS_LZMA),y)
+  SQUASHFSCOMP := lzma $(LZMA_XZ_OPTIONS)
+endif
+ifeq ($(CONFIG_SQUASHFS_XZ),y)
+  SQUASHFSCOMP := xz $(LZMA_XZ_OPTIONS)
+endif
+
 JFFS2_BLOCKSIZE ?= 64k 128k
 
 define add_jffs2_mark
        echo -ne '\xde\xad\xc0\xde' >> $(1)
 endef
 
-# pad to 4k, 8k, 64k, 128k and add jffs2 end-of-filesystem mark
+# pad to 4k, 8k, 64k, 128k 256k and add jffs2 end-of-filesystem mark
 define prepare_generic_squashfs
-       dd if=$(1) of=$(KDIR)/tmpfile.0 bs=4k conv=sync
-       $(call add_jffs2_mark,$(KDIR)/tmpfile.0)
-       dd if=$(KDIR)/tmpfile.0 of=$(KDIR)/tmpfile.1 bs=4k conv=sync
-       $(call add_jffs2_mark,$(KDIR)/tmpfile.1)
-       dd if=$(KDIR)/tmpfile.1 of=$(KDIR)/tmpfile.2 bs=64k conv=sync
-       $(call add_jffs2_mark,$(KDIR)/tmpfile.2)
-       dd if=$(KDIR)/tmpfile.2 of=$(1) bs=64k conv=sync
-       $(call add_jffs2_mark,$(1))
-       rm -f $(KDIR)/tmpfile.*
+       $(STAGING_DIR_HOST)/bin/padjffs2 $(1) 4 8 64 128 256
 endef
 
 
@@ -86,7 +89,7 @@ else
   ifneq ($(CONFIG_TARGET_ROOTFS_SQUASHFS),)
     define Image/mkfs/squashfs
                @mkdir -p $(TARGET_DIR)/overlay
-               $(STAGING_DIR_HOST)/bin/mksquashfs4 $(TARGET_DIR) $(KDIR)/root.squashfs -nopad -noappend -root-owned -comp lzma -processors 1
+               $(STAGING_DIR_HOST)/bin/mksquashfs4 $(TARGET_DIR) $(KDIR)/root.squashfs -nopad -noappend -root-owned -comp $(SQUASHFSCOMP) $(SQUASHFSOPT) -processors $(if $(CONFIG_PKG_BUILD_JOBS),$(CONFIG_PKG_BUILD_JOBS),1)
                $(call Image/Build,squashfs)
     endef
   endif
@@ -111,7 +114,8 @@ endif
 
 ifneq ($(CONFIG_TARGET_ROOTFS_TARGZ),)
   define Image/mkfs/targz
-               $(TAR) -zcf $(BIN_DIR)/$(IMG_PREFIX)-rootfs.tar.gz --numeric-owner --owner=0 --group=0 -C $(TARGET_DIR)/ .
+               # Preserve permissions (-p) when building as non-root user
+               $(TAR) -czpf $(BIN_DIR)/$(IMG_PREFIX)-rootfs.tar.gz --numeric-owner --owner=0 --group=0 -C $(TARGET_DIR)/ .
   endef
 endif
 
@@ -137,9 +141,10 @@ endif
 
 
 define Image/mkfs/prepare/default
-       - $(FIND) $(TARGET_DIR) -type f -not -perm +0100 -not -name 'ssh_host*' -print0 | $(XARGS) -0 chmod 0644
-       - $(FIND) $(TARGET_DIR) -type f -perm +0100 -print0 | $(XARGS) -0 chmod 0755
-       - $(FIND) $(TARGET_DIR) -type d -print0 | $(XARGS) -0 chmod 0755
+       # Use symbolic permissions to avoid clobbering SUID/SGID/sticky bits
+       - $(FIND) $(TARGET_DIR) -type f -not -perm +0100 -not -name 'ssh_host*' -print0 | $(XARGS) -0 chmod u+rw,g+r,o+r
+       - $(FIND) $(TARGET_DIR) -type f -perm +0100 -print0 | $(XARGS) -0 chmod u+rwx,g+rx,o+rx
+       - $(FIND) $(TARGET_DIR) -type d -print0 | $(XARGS) -0 chmod u+rwx,g+rx,o+rx
        $(INSTALL_DIR) $(TARGET_DIR)/tmp
        chmod 0777 $(TARGET_DIR)/tmp
 endef