jschoubben
f7616c6a9b
mesh/delivery merged: source.main moved to novox/mesh-catalog@b9abfde492b2
mesh/check checking f7616c6a9bd4 on b9abfde492b2
Before mkinitcpio -P, a preset naming ALL_config="/etc/mkinitcpio.conf" is copied to the state's taken-over/ and loses that line (another ALL_config is left and named); after it, an image without kernel/x86/microcode/ in its first 64 KiB fails the unit and records nothing. The unit may write /etc/mkinitcpio.d. The README names no node. Tests: 1977/AC7, 1977/AC8; AC3/AC4 fixtures write images. Builds: L7, L8, L9 (issue 1977 note 4)
72 lines
3.1 KiB
Bash
72 lines
3.1 KiB
Bash
#!/bin/sh
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# The initramfs images as the mesh builds them (module kernel, novox/hq issue 1977). Run by
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# mesh-kernel-initramfs.service:
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#
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# initramfs apply [<the microcode drop-in> [<this module's state> [<preset directory> [<boot directory>]]]]
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#
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# `apply` builds every image again (mkinitcpio -P) when the drop-in differs from the one the images were last built
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# with, kept in the state as `initramfs-built`, and records the drop-in only after mkinitcpio succeeded. Later
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# kernel upgrades build the images through the distribution's own hook, with the drop-in in place.
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#
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# A preset that names the default configuration (ALL_config="/etc/mkinitcpio.conf") makes mkinitcpio pass -c and skip
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# mkinitcpio.conf.d, so the drop-in is never read: before building, that line is taken out of the preset, a copy of
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# the preset kept in the state's taken-over directory (novox/hq ADR 0508 §10's way with a file the mesh did not
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# write); any other ALL_config is left and named. After building, every image must hold microcode in its first
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# 64 KiB (the early uncompressed archive), else the unit fails and records nothing. The arguments are only for the
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# module's tests.
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set -eu
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dropin=/etc/mkinitcpio.conf.d/mesh-microcode.conf
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state='${dir:state}'
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[ $# -ge 2 ] && dropin=$2
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[ $# -ge 3 ] && state=$3
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presets=/etc/mkinitcpio.d
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boot=/boot
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[ $# -ge 4 ] && presets=$4
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[ $# -ge 5 ] && boot=$5
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[ $# -ge 1 ] && [ "$1" = apply ] || {
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echo "usage: initramfs apply [<drop-in> [<state directory>]]" >&2
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exit 2
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}
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[ -f "$dropin" ] || {
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echo "initramfs: $dropin is not there, so the images cannot be built with the microcode hook" >&2
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exit 1
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}
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if [ -f "$state/initramfs-built" ] && cmp -s "$dropin" "$state/initramfs-built"; then
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echo "initramfs: the images were built with this drop-in, as it was"
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exit 0
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fi
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for preset in "$presets"/*.preset; do
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[ -f "$preset" ] || continue
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if grep -qx 'ALL_config="/etc/mkinitcpio.conf"' "$preset"; then
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mkdir -p "$state/taken-over"
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cp "$preset" "$state/taken-over/$(basename "$preset")"
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grep -vx 'ALL_config="/etc/mkinitcpio.conf"' "$preset" >"$preset.new" || true
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cat "$preset.new" >"$preset"
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rm -f "$preset.new"
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echo "initramfs: $preset named the default configuration, which skips mkinitcpio.conf.d; that line is taken out, a copy is in $state/taken-over"
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elif grep -q '^ALL_config=' "$preset"; then
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echo "initramfs: $preset sets $(grep '^ALL_config=' "$preset" | head -n 1), so the microcode drop-in may not be read; left as it is"
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fi
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done
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if ! mkinitcpio -P; then
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echo "initramfs: mkinitcpio failed; nothing recorded, the next start tries again" >&2
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exit 1
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fi
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missing=
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for img in "$boot"/initramfs-*.img; do
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[ -e "$img" ] || continue
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if ! head -c 65536 "$img" >"$state/image-head.tmp" || ! grep -aq 'kernel/x86/microcode/' "$state/image-head.tmp"; then
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missing="$missing $(basename "$img")"
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fi
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done
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rm -f "$state/image-head.tmp"
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if [ -n "$missing" ]; then
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echo "initramfs: mkinitcpio ran, but no microcode is in the early archive of:$missing; nothing recorded" >&2
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exit 1
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fi
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cp "$dropin" "$state/initramfs-built.new"
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mv "$state/initramfs-built.new" "$state/initramfs-built"
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echo "initramfs: the images are built with the microcode drop-in"
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