From 0b23d3608c1f01f9dc4d042b0217ee0291c0fd70 Mon Sep 17 00:00:00 2001 From: Christian Marangi Date: Sat, 16 Sep 2023 17:16:04 +0200 Subject: [PATCH] base-files: add support for rootfs mount options from cmdline 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 --- .../files/lib/preinit/80_mount_root | 21 ++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/package/base-files/files/lib/preinit/80_mount_root b/package/base-files/files/lib/preinit/80_mount_root index c3816c2cbf..fa6abcde57 100644 --- a/package/base-files/files/lib/preinit/80_mount_root +++ b/package/base-files/files/lib/preinit/80_mount_root @@ -14,8 +14,27 @@ missing_lines() { IFS="$oIFS" } +# Rootfs mount options can be passed by declaring in the kernel +# cmdline as much options as needed prefixed with "rootfs_mount_options." +# +# Example: +# rootfs_mount_options.compress_algorithm=zstd rootfs_mount_options.noinline_data +# +compose_rootfs_mount_options() { + local mount_options + local cmdlinevar + + for cmdlinevar in $(cat /proc/cmdline); do + if [ "$cmdlinevar" != "${cmdlinevar#rootfs_mount_options\.}" ]; then + append mount_options "${cmdlinevar#rootfs_mount_options\.}" + fi + done + + echo $mount_options +} + do_mount_root() { - mount_root + mount_root start "$(compose_rootfs_mount_options)" boot_run_hook preinit_mount_root [ -f /sysupgrade.tgz -o -f /tmp/sysupgrade.tar ] && { echo "- config restore -" -- 2.30.2