From 35413b047c2c2d2229165ef021a4ef801ca16eb8 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Thu, 20 Feb 2020 13:40:55 +0100
Subject: [PATCH] bcm53xx: sysupgrade: optimize building UBI image
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Use "truncate" to adjust size of existing file instead of "dd" which
required creating a copy. This saves space on tmpfs. It may be as low
as 2.1 MiB when using OpenWrt default user space and way more (20+ MiB)
when flashing vendor firmware.
Signed-off-by: RafaÅ MiÅecki <rafal@milecki.pl>
(cherry picked from commit 8abefc8896e7138a101fbb3d228946c43321503e)
---
target/linux/bcm53xx/base-files/lib/upgrade/platform.sh | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/target/linux/bcm53xx/base-files/lib/upgrade/platform.sh b/target/linux/bcm53xx/base-files/lib/upgrade/platform.sh
index 1686462cde..40b2ef67be 100644
--- a/target/linux/bcm53xx/base-files/lib/upgrade/platform.sh
+++ b/target/linux/bcm53xx/base-files/lib/upgrade/platform.sh
@@ -1,4 +1,4 @@
-RAMFS_COPY_BIN='osafeloader oseama otrx'
+RAMFS_COPY_BIN='osafeloader oseama otrx truncate'
PART_NAME=firmware
@@ -281,7 +281,7 @@ platform_do_upgrade_nand_trx() {
while [ "$(dd if=$dir/root skip=$ubi_length bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
ubi_length=$(($ubi_length + 131072))
done
- dd if=$dir/root of=/tmp/root.ubi bs=131072 count=$((ubi_length / 131072)) 2>/dev/null
+ truncate -s $ubi_length $dir/root
[ $? -ne 0 ] && {
echo "Failed to prepare new UBI image."
return
@@ -289,7 +289,7 @@ platform_do_upgrade_nand_trx() {
# Flash
mtd write /tmp/kernel.trx firmware || exit 1
- nand_do_upgrade /tmp/root.ubi
+ nand_do_upgrade $dir/root
}
platform_do_upgrade_nand_seama() {
--
2.30.2