mirror of
https://github.com/Telecominfraproject/wlan-ap.git
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75 lines
2.8 KiB
Diff
75 lines
2.8 KiB
Diff
From 7ed003d57f1c5273fecddabcdc7bd6845c3854a0 Mon Sep 17 00:00:00 2001
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From: John Crispin <john@phrozen.org>
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Date: Sat, 20 Feb 2021 08:36:43 +0100
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Subject: [PATCH 05/27] sysupgrade-nand: allow limiting rootfs_data by setting
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env variable
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Check if firmware environment variable 'rootfs_data_max' exists and is
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set to a numerical value greater than 0. If so, limit rootfs_data
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volume to that size instead of using the maximum available size.
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This is useful on devices with lots of flash where users may want to
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have eg. a volume for persistent logs and statistics or for external
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applications/containers. Persistence on rootfs overlay is limited by
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the size of memory available during the sysugprade process as that
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data needs to be copied to RAM while the volume is being recreated
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during sysupgrade. Hence it is unsuitable for keeping larger amounts
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of data accross upgrade which makes additional volume(s) for
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application data desirable.
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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---
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package/base-files/files/lib/upgrade/nand.sh | 20 ++++++++++++++++----
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1 file changed, 16 insertions(+), 4 deletions(-)
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diff --git a/package/base-files/files/lib/upgrade/nand.sh b/package/base-files/files/lib/upgrade/nand.sh
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index 5bc9ff83f9..e335d940ed 100644
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--- a/package/base-files/files/lib/upgrade/nand.sh
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+++ b/package/base-files/files/lib/upgrade/nand.sh
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@@ -117,6 +117,9 @@ nand_restore_config() {
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nand_upgrade_prepare_ubi() {
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local rootfs_length="$1"
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local rootfs_type="$2"
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+ local rootfs_data_max="$(fw_printenv -n rootfs_data_max 2>/dev/null)"
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+ [ -n "$rootfs_data_max" ] && rootfs_data_max=$(printf %d "$rootfs_data_max")
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+
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local kernel_length="$3"
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local has_env="${4:-0}"
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@@ -176,11 +179,11 @@ nand_upgrade_prepare_ubi() {
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# update rootfs
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if [ -n "$rootfs_length" ]; then
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- local root_size_param
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+ local rootfs_size_param
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if [ "$rootfs_type" = "ubifs" ]; then
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- root_size_param="-m"
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+ rootfs_size_param="-m"
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else
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- root_size_param="-s $rootfs_length"
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+ rootfs_size_param="-s $rootfs_length"
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fi
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if ! ubimkvol /dev/$ubidev -N $CI_ROOTPART $rootfs_size_param; then
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echo "cannot create rootfs volume"
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@@ -190,7 +193,16 @@ nand_upgrade_prepare_ubi() {
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# create rootfs_data for non-ubifs rootfs
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if [ "$rootfs_type" != "ubifs" ]; then
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- if ! ubimkvol /dev/$ubidev -N rootfs_data -m; then
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+ local availeb=$(cat /sys/devices/virtual/ubi/$ubidev/avail_eraseblocks)
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+ local ebsize=$(cat /sys/devices/virtual/ubi/$ubidev/eraseblock_size)
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+ local avail_size=$(( $availeb * $ebsize ))
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+ local rootfs_data_size_param="-m"
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+ if [ -n "$rootfs_data_max" ] &&
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+ [ "$rootfs_data_max" != "0" ] &&
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+ [ "$rootfs_data_max" -le "$avail_size" ]; then
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+ rootfs_data_size_param="-s $rootfs_data_max"
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+ fi
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+ if ! ubimkvol /dev/$ubidev -N rootfs_data $rootfs_data_size_param; then
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echo "cannot initialize rootfs_data volume"
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return 1
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fi
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--
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2.25.1
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