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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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