Due to filesystem write caching the old configuration data could stay
out of flash for a long time during a first boot after the sysupgrade.
Power loss during this period could damage the overlay data and even
make device inaccessable via the network.
Fix this by syncing data to a flash as soon as the previous
configuration will be unpacked after the sysupgrade. Also sync the FS
state after the sysupgrade.tgz archive removing to prevent duplicative
extraction of a previous configuration.
Tested with AMD Geode based board.
Signed-off-by: Sergey Ryazanov <ryazanov....@gmail.com>
---
package/base-files/files/etc/init.d/done | 2 +-
package/base-files/files/lib/preinit/80_mount_root | 2 ++
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/package/base-files/files/etc/init.d/done
b/package/base-files/files/etc/init.d/done
index 374353a23c..32d6118df7 100755
--- a/package/base-files/files/etc/init.d/done
+++ b/package/base-files/files/etc/init.d/done
@@ -4,7 +4,7 @@
START=95
boot() {
mount_root done
- rm -f /sysupgrade.tgz
+ rm -f /sysupgrade.tgz && sync
# process user commands
[ -f /etc/rc.local ] && {
diff --git a/package/base-files/files/lib/preinit/80_mount_root
b/package/base-files/files/lib/preinit/80_mount_root
index f3fe788e19..265a3f18df 100644
--- a/package/base-files/files/lib/preinit/80_mount_root
+++ b/package/base-files/files/lib/preinit/80_mount_root
@@ -9,6 +9,8 @@ do_mount_root() {
echo "- config restore -"
cd /
tar xzf /sysupgrade.tgz
+ # Prevent configuration corruption on a power loss
+ sync
}
}
--
2.26.2
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