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# SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause
. /lib/functions/bcm4908.sh
rootfs_create() {
local blocks
blocks=$(cat /sys/class/ubi/ubi0/avail_eraseblocks)
[ -z "$blocks" ] && {
echo "Failed to read amount of available erase blocks" >&2
return
}
# Use 80% of remaining flash size for "rootfs_data"
ubimkvol /dev/ubi0 -n 20 -N rootfs_data --lebs $((blocks / 100 * 80))
mknod -m 0600 /dev/ubi0_20 c 252 21
bcm4908_verify_rootfs_data ubi0_20
}
rootfs_prepare() {
# Do nothing on CFE devices
ubinfo /dev/ubi0 -N metadata1 > /dev/null 2>&1 || return
# Find UBI volume device (e.g. ubi0_123)
local ubivol="$(grep rootfs_data /sys/class/ubi/ubi*/name | sed -n 's/.*\(ubi\d*_\d*\).*/\1/p')"
if [ -n "$ubivol" ]; then
bcm4908_verify_rootfs_data $ubivol
else
echo "Creating \"rootfs_data\" UBI volume"
rootfs_create
fi
}
boot_hook_add preinit_main rootfs_prepare
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