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0b23d3608c
Add support for configuring rootfs mount options from cmdline. Rootfs mount options can be passed by declaring in the kernel cmdline as much options as needed prefixed with "rootfs_mount_options." An example usage is with rootfs with F2FS filesystem to enable compress_algorithm to reduce flash wear by compressing the files before writing to flash. Example usage: "... rootfs_mount_options.compress_algorithm=zstd ..." To pass multiple options: "... rootfs_mount_options.compress_algorithm=zstd rootfs_mount_options.noinline_data ..." Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
55 lines
1.4 KiB
Plaintext
55 lines
1.4 KiB
Plaintext
# Copyright (C) 2006 OpenWrt.org
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# Copyright (C) 2010 Vertical Communications
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missing_lines() {
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local file1 file2 line
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file1="$1"
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file2="$2"
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oIFS="$IFS"
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IFS=":"
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while read line; do
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set -- $line
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grep -q "^$1:" "$file2" || echo "$*"
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done < "$file1"
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IFS="$oIFS"
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}
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# Rootfs mount options can be passed by declaring in the kernel
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# cmdline as much options as needed prefixed with "rootfs_mount_options."
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#
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# Example:
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# rootfs_mount_options.compress_algorithm=zstd rootfs_mount_options.noinline_data
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#
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compose_rootfs_mount_options() {
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local mount_options
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local cmdlinevar
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for cmdlinevar in $(cat /proc/cmdline); do
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if [ "$cmdlinevar" != "${cmdlinevar#rootfs_mount_options\.}" ]; then
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append mount_options "${cmdlinevar#rootfs_mount_options\.}"
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fi
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done
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echo $mount_options
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}
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do_mount_root() {
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mount_root start "$(compose_rootfs_mount_options)"
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boot_run_hook preinit_mount_root
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[ -f /sysupgrade.tgz -o -f /tmp/sysupgrade.tar ] && {
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echo "- config restore -"
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cp /etc/passwd /etc/group /etc/shadow /tmp
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cd /
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[ -f /sysupgrade.tgz ] && tar xzf /sysupgrade.tgz
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[ -f /tmp/sysupgrade.tar ] && tar xf /tmp/sysupgrade.tar
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missing_lines /tmp/passwd /etc/passwd >> /etc/passwd
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missing_lines /tmp/group /etc/group >> /etc/group
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missing_lines /tmp/shadow /etc/shadow >> /etc/shadow
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rm /tmp/passwd /tmp/group /tmp/shadow
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# Prevent configuration corruption on a power loss
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sync
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}
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}
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[ "$INITRAMFS" = "1" ] || boot_hook_add preinit_main do_mount_root
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