main/postmarketos-initramfs: run fsck and mount sysroot as rw (MR 5238)

This moves the responsibility to auto-repair filesystems to the
initramfs. (I think we don't do this at all right now).
We don't try to mount broken partitions at all, we tell the user
that the system is broken and fail_to_boot.

The flow is now:

1. mount the boot partition (read-only) for initramfs-extra
2. initramfs-extra is extracted (with the needed fsck executables)
3. fsck the root partition
4. mount root partition (read-write)
5. fsck the boot partition
6. mount the boot partition (read-write)

This helps with the systemd bringup, as we want to make use of
systemd-firstboot, which sets /etc and enabled services up. As
this service is responsible of setting up /etc, it is run before
/etc/fstab is read and before / is remounted read-write.

main/postmarketos-initramfs/00-initramfs-extra-base.files

@@ -2,7 +2,9 @@
 /sbin/btrfs
 /sbin/dmsetup
 /sbin/e2fsck
+/sbin/fsck.vfat
 /sbin/switch_root
+/usr/sbin/fsck.f2fs
 /usr/sbin/parted
-/usr/sbin/resize2fs
 /usr/sbin/resize.f2fs
+/usr/sbin/resize2fs

main/postmarketos-initramfs/APKBUILD

 # Maintainer: Oliver Smith <ollieparanoid@postmarketos.org>
 # Co-Maintainer: Clayton Craft <clayton@craftyguy.net>
 pkgname=postmarketos-initramfs
-pkgver=3.2.1
+pkgver=3.3.0
 pkgrel=0
 pkgdesc="Base files for the postmarketOS initramfs / initramfs-extra"
 url="https://postmarketos.org"
@@ -17,6 +17,7 @@ depends="
 	cryptsetup
 	device-mapper
 	devicepkg-utils>=0.2.0
+	dosfstools
 	e2fsprogs
 	e2fsprogs-extra
 	f2fs-tools
@@ -90,8 +91,8 @@ sha512sums="
 20bc7a21f4f59548b8179c5cb1fc2b3db64eb355988bce992db3bc4075d65b4135ff9dd7d754215d0402978811494449cce476a26cda6bb2f0f8b53ae8e36bd7  00-default.modules
 9c0e8f6f61d5da191e03a1aa9d5d0ceb5baf1eae6dbb9bfb0af59817783525119ac8394b135f303f7b6434a3eab0b49185fb90379e06823db847a4999c75ce33  00-initramfs-base.dirs
 929a8e6cca6b2b4ac6af89fc3912e80315f51c9bf6e9479124ccb7ebe9e99c6c1cafb98d3aa01b0a76a2f6e0071ba3eb86c7a2169a15c2e1788d69458bea3471  00-initramfs-base.files
-8a4adad3785af474b36a09a05f6a3b2c4b4f43aac331a53b903abfa51ea12be1e3d1d807b7a6e66a1346815f3b0044daf8cd62e21e2dc75d2db13ee265a72985  00-initramfs-extra-base.files
+f0f00a35f06b7d0a46c67df753ecef880ac92a725a8301649068069d2d477ae3278b3c548ea3f378b4c23eafb39551f5e3ca6a63478486d50a298132140b5b69  00-initramfs-extra-base.files
 e85386077d590cd0db0745e8b58f3323a408cb6a94bca0e4395c43e4db18b0beef29324ed2bfeab6511d0e3b297c067e5a37f420a6877d9c28c285f2416ca420  init.sh
-e0954014d73e7a61376a2463978a4b44d17bbb2319072382a3412a8214e9c3e45266266d8eebd37634b1b18a71094055464a7c81b973501378dcf05aa5c2f4c0  init_functions.sh
+aa9591e2c35577bc3c1e9bafa7904b3dff97c42992a763113fff20754e82d521cc690733a1606d6808d556b5a271b5ad8fdc0d2aa475fcb3921433dca0ce178b  init_functions.sh
 ba3275a9af788c7c782322a22a0f144d5e50e3498ea6886486a29331f23ae89cd32d500a3635cfa7cab369afba92edc18aeca64ccbf0cd589061cce23d15b46c  unudhcpd.conf
 "

main/postmarketos-initramfs/init_functions.sh

@@ -341,6 +341,57 @@ get_partition_type() {
 	blkid "$partition" | sed 's/^.*TYPE="\([a-zA-z0-9_]*\)".*$/\1/'
 }
 
+# $1: partition
+check_filesystem() {
+	local partition=""
+	local status=""
+	local type=""
+
+	partition="$1"
+	type="$(get_partition_type "$partition")"
+	case "$type" in
+		btrfs)
+			echo "Check 'btrfs' root filesystem ($partition)"
+			if ! btrfs check --readonly "$partition" ; then
+				status="fail"
+			fi
+			;;
+		ext*)
+			echo "Auto-repair and check 'ext' filesystem ($partition)"
+			e2fsck -p "$partition"
+			if [ $? -ge 4 ]; then
+				status="fail"
+			fi
+			;;
+		f2fs)
+			echo "Auto-repair and check 'f2fs' filesystem ($partition)"
+			fsck.f2fs -p "$partition"
+			status=$?
+			if [ $? -gt 4 ]; then
+				status="fail"
+			fi
+			;;
+		vfat)
+			echo "Auto-repair and check 'vfat' filesystem ($partition)"
+			fsck.vfat -p "$partition"
+			if [ $? -gt 4 ]; then
+				status="fail"
+			fi
+
+			;;
+		*)	echo "WARNING: fsck not supported for '$type' filesystem ($partition)." ;;
+	esac
+
+	if [ "$status" = "fail" ]; then
+		show_splash "WARNING: filesystem needs manual repair (fsck) ($partition)\\nhttps://postmarketos.org/troubleshooting\\n\\nBoot anyways by pressing Volume-Up or Left-Shift..."
+		while ! iskey KEY_LEFTSHIFT KEY_VOLUMEUP ; do
+			:
+		done
+	fi
+
+	show_splash "Loading..."
+}
+
 # $1: path
 # $2: set to "rw" for read-write
 # Mount the boot partition. It gets mounted twice, first at /boot (ro), then at
@@ -356,6 +407,7 @@ mount_boot_partition() {
 	fi
 
 	if [ "$2" = "rw" ]; then
+		check_filesystem "$partition"
 		echo "Mount boot partition ($partition) to $1 (read-write)"
 	else
 		mount_opts="$mount_opts,ro"
@@ -580,14 +632,15 @@ mount_root_partition() {
 	partition="$(find_root_partition)"
 	rootfsopts=""
 
+	check_filesystem "$partition"
 	# shellcheck disable=SC2013
 	for x in $(cat /proc/cmdline); do
 		[ "$x" = "${x#pmos_rootfsopts=}" ] && continue
-		# Prepend a comma because this will be appended to "ro" below
+		# Prepend a comma because this will be appended to "rw" below
 		rootfsopts=",${x#pmos_rootfsopts=}"
 	done
 
-	echo "Mount root partition ($partition) to /sysroot (read-only) with options ${rootfsopts#,}"
+	echo "Mount root partition ($partition) to /sysroot (read-write) with options ${rootfsopts#,}"
 	type="$(get_partition_type "$partition")"
 	echo "Detected $type filesystem"
 
@@ -600,7 +653,7 @@ mount_root_partition() {
 	if ! modprobe "$type"; then
 		echo "INFO: unable to load module '$type' - maybe it's built in"
 	fi
-	if ! mount -t "$type" -o ro"$rootfsopts" "$partition" /sysroot; then
+	if ! mount -t "$type" -o rw"$rootfsopts" "$partition" /sysroot; then
 		echo "ERROR: unable to mount root partition!"
 		show_splash "ERROR: unable to mount root partition\\nhttps://postmarketos.org/troubleshooting"
 		fail_halt_boot