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dracut/0400-use_fstab_systemd.patch

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From: Fabian Vogt <fvogt@suse.com>
Subject: Use /etc/fstab for /sysroot instead of custom sysroot.mount
systemd-fstab-generator is capable of mounting /sysroot itself,
looking at /proc/cmdline if root= is set.
Index: dracut-043/modules.d/00systemd/module-setup.sh
===================================================================
--- dracut-043.orig/modules.d/00systemd/module-setup.sh
+++ dracut-043/modules.d/00systemd/module-setup.sh
@@ -14,7 +14,7 @@ check() {
# called by dracut
depends() {
- return 0
+ echo fs-lib
}
installkernel() {
@@ -22,6 +22,23 @@ installkernel() {
instmods -s efivarfs
}
+fstab_sysroot() {
+ local _dev=/dev/block/$(find_root_block_device)
+ local _fstype _flags _subvol
+ if [ -e $_dev ]; then
+ _dev=$(shorten_persistent_dev "$(get_persistent_dev "$_dev")")
+ _fstype="$(find_mp_fstype /)"
+ _flags="$(find_mp_fsopts /)"
+
+ if [[ $use_fstab != yes ]] && [[ $_fstype = btrfs ]]; then
+ _subvol=$(findmnt -e -v -n -o FSROOT --target /) \
+ && _subvol=${_subvol#/}
+ _flags="$_flags,${_subvol:+subvol=$_subvol}"
+ fi
+ printf "%s /sysroot %s %s 1 1\n" "$_dev" "$_fstype" "${_flags#,}"
+ fi
+}
+
# called by dracut
install() {
local _mods
@@ -216,5 +233,8 @@ install() {
} >> "$initdir/etc/systemd/journald.conf"
ln_r "${systemdsystemunitdir}/multi-user.target" "${systemdsystemunitdir}/default.target"
+
+ # Add entry for /sysroot to /etc/fstab
+ fstab_sysroot >> "$initdir/etc/fstab"
}
Index: dracut-043/modules.d/95rootfs-block/module-setup.sh
===================================================================
--- dracut-043.orig/modules.d/95rootfs-block/module-setup.sh
+++ dracut-043/modules.d/95rootfs-block/module-setup.sh
@@ -48,22 +48,25 @@ cmdline_rootfs() {
# called by dracut
cmdline() {
- cmdline_rootfs
- cmdline_journal
+ # When using systemd, we're storing the root device in /etc/fstab instead.
+ if ! dracut_module_included "systemd"; then
+ cmdline_rootfs
+ cmdline_journal
+ fi
}
# called by dracut
install() {
- if [[ $hostonly_cmdline == "yes" ]]; then
- local _journaldev=$(cmdline_journal)
- [[ $_journaldev ]] && printf "%s\n" "$_journaldev" >> "${initdir}/etc/cmdline.d/95root-journaldev.conf"
- local _rootdev=$(cmdline_rootfs)
- [[ $_rootdev ]] && printf "%s\n" "$_rootdev" >> "${initdir}/etc/cmdline.d/95root-dev.conf"
- fi
-
inst_multiple umount
inst_multiple tr
if ! dracut_module_included "systemd"; then
+ if [[ $hostonly_cmdline == "yes" ]]; then
+ local _journaldev=$(cmdline_journal)
+ [[ $_journaldev ]] && printf "%s\n" "$_journaldev" >> "${initdir}/etc/cmdline.d/95root-journaldev.conf"
+ local _rootdev=$(cmdline_rootfs)
+ [[ $_rootdev ]] && printf "%s\n" "$_rootdev" >> "${initdir}/etc/cmdline.d/95root-dev.conf"
+ fi
+
inst_hook cmdline 95 "$moddir/parse-block.sh"
inst_hook pre-udev 30 "$moddir/block-genrules.sh"
inst_hook mount 99 "$moddir/mount-root.sh"
Index: dracut-043/modules.d/98dracut-systemd/dracut-cmdline.sh
===================================================================
--- dracut-043.orig/modules.d/98dracut-systemd/dracut-cmdline.sh
+++ dracut-043/modules.d/98dracut-systemd/dracut-cmdline.sh
@@ -68,8 +68,12 @@ case "$root" in
rootok=1 ;;
esac
-[ -z "$root" ] && die "No or empty root= argument"
-[ -z "$rootok" ] && die "Don't know how to handle 'root=$root'"
+if [ -z "$root" ]; then
+ root=$(findmnt --fstab -n --output source --target /sysroot)
+ [ -z "$root" ] && die "No or empty root= argument and not in fstab"
+elif [ -z "$rootok" ]; then
+ die "Don't know how to handle 'root=$root'"
+fi
export root rflags fstype netroot NEWROOT
Index: dracut-043/modules.d/98dracut-systemd/rootfs-generator.sh
===================================================================
--- dracut-043.orig/modules.d/98dracut-systemd/rootfs-generator.sh
+++ dracut-043/modules.d/98dracut-systemd/rootfs-generator.sh
@@ -36,35 +36,6 @@ generator_wait_for_dev()
fi
}
-generator_mount_rootfs()
-{
- local _type=$2
- local _flags=$3
- local _name
-
- [ -z "$1" ] && return 0
-
- _name=$(dev_unit_name "$1")
- [ -d "$GENERATOR_DIR" ] || mkdir -p "$GENERATOR_DIR"
- if ! [ -f "$GENERATOR_DIR"/sysroot.mount ]; then
- {
- echo "[Unit]"
- echo "Before=initrd-root-fs.target"
- echo "RequiresOverridable=systemd-fsck@${_name}.service"
- echo "After=systemd-fsck@${_name}.service"
- echo "[Mount]"
- echo "Where=/sysroot"
- echo "What=$1"
- echo "Options=${_flags}"
- echo "Type=${_type}"
- } > "$GENERATOR_DIR"/sysroot.mount
- fi
- if ! [ -L "$GENERATOR_DIR"/initrd-root-fs.target.requires/sysroot.mount ]; then
- [ -d "$GENERATOR_DIR"/initrd-root-fs.target.requires ] || mkdir -p "$GENERATOR_DIR"/initrd-root-fs.target.requires
- ln -s ../sysroot.mount "$GENERATOR_DIR"/initrd-root-fs.target.requires/sysroot.mount
- fi
-}
-
generator_fsck_after_pre_mount()
{
local _name
@@ -111,9 +82,12 @@ esac
GENERATOR_DIR="$1"
if [ "${root%%:*}" = "block" ]; then
- generator_wait_for_dev "${root#block:}" "$RDRETRY"
- generator_fsck_after_pre_mount "${root#block:}"
- strstr "$(cat /proc/cmdline)" 'root=' || generator_mount_rootfs "${root#block:}" "$(getarg rootfstype=)" "$(getarg rootflags=)"
+ generator_wait_for_dev "${root#block:}" "$RDRETRY"
+ generator_fsck_after_pre_mount "${root#block:}"
+ if ! [ -L "$GENERATOR_DIR"/initrd-root-fs.target.requires/sysroot.mount ]; then
+ [ -d "$GENERATOR_DIR"/initrd-root-fs.target.requires ] || mkdir -p "$GENERATOR_DIR"/initrd-root-fs.target.requires
+ ln -s ../sysroot.mount "$GENERATOR_DIR"/initrd-root-fs.target.requires/sysroot.mount
+ fi
fi
exit 0
Index: dracut-043/modules.d/99base/init.sh
===================================================================
--- dracut-043.orig/modules.d/99base/init.sh
+++ dracut-043/modules.d/99base/init.sh
@@ -128,8 +128,12 @@ make_trace_mem "hook cmdline" '1+:mem' '
getarg 'rd.break=cmdline' -d 'rdbreak=cmdline' && emergency_shell -n cmdline "Break before cmdline"
source_hook cmdline
-[ -z "$root" ] && die "No or empty root= argument"
-[ -z "$rootok" ] && die "Don't know how to handle 'root=$root'"
+if [ -z "$root" ]; then
+ root=$(findmnt --fstab -n --output source --target /sysroot)
+ [ -z "$root" ] && die "No or empty root= argument and not in fstab"
+elif [ -z "$rootok" ]; then
+ die "Don't know how to handle 'root=$root'"
+fi
export root rflags fstype netroot NEWROOT
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