server: safer gadget bring-up + kernel upgrade hook

This commit is contained in:
Brad Stein 2026-01-09 22:50:09 -03:00
parent a939dfcc77
commit 06bc0cd98d
3 changed files with 134 additions and 4 deletions

View File

@ -106,6 +106,7 @@ cleanup() {
DISABLE_UAC=${LESAVKA_DISABLE_UAC:-}
DISABLE_UVC=${LESAVKA_DISABLE_UVC:-}
ALLOW_RESET=${LESAVKA_ALLOW_GADGET_RESET:-}
UVC_FALLBACK=${LESAVKA_UVC_FALLBACK:-1}
UVC_STREAMING_INTERVAL=${LESAVKA_UVC_STREAMING_INTERVAL:-1}
UVC_MAXPACKET=${LESAVKA_UVC_MAXPACKET:-1024}
@ -155,7 +156,9 @@ grep -q 'dtoverlay=dwc2,dr_mode=peripheral' "$CFG" || echo 'dtoverlay=dwc2,dr_mo
modprobe dwc2 || { echo "dwc2 not in kernel; abort" >&2; exit 1; }
modprobe libcomposite || { echo "libcomposite not in kernel; abort" >&2; exit 1; }
modprobe -r uvcvideo 2>/dev/null || true
if [[ -n ${LESAVKA_RELOAD_UVCVIDEO:-} ]]; then
modprobe -r uvcvideo 2>/dev/null || true
fi
modprobe uvcvideo || { echo "uvcvideo not in kernel; abort" >&2; exit 1; }
udevadm control --reload
@ -192,12 +195,22 @@ fi
[[ -n $UDC ]] || { log "❌ UDC not present after manual bind"; exit 1; }
log "✅ UDC detected: $UDC"
# If a gadget is already configured, avoid tearing it down unless forced.
if [[ -d $G && -z $ALLOW_RESET ]]; then
if [[ -s $G/UDC || -d $G/configs/c.1 ]]; then
log "🔒 gadget already configured; skipping reset."
log " Set LESAVKA_ALLOW_GADGET_RESET=1 to force rebuild."
attach_gadget || true
exit 0
fi
fi
# Guard against lockups: if the gadget is already bound, don't reset unless forced.
BOUND_UDC=""
if [[ -r $G/UDC ]]; then
BOUND_UDC=$(cat "$G/UDC" 2>/dev/null || true)
fi
if [[ -n $BOUND_UDC && -z ${LESAVKA_ALLOW_GADGET_RESET:-} ]]; then
if [[ -n $BOUND_UDC && -z $ALLOW_RESET ]]; then
log "🔒 gadget already bound to '$BOUND_UDC' - refusing reset."
log " Set LESAVKA_ALLOW_GADGET_RESET=1 to force."
exit 0
@ -205,7 +218,7 @@ fi
# Guard against lockups: don't reset gadget while host is attached unless forced.
UDC_STATE="$(udc_state "$UDC")"
if [[ -z ${LESAVKA_ALLOW_GADGET_RESET:-} ]] && is_attached_state "$UDC_STATE"; then
if [[ -z $ALLOW_RESET ]] && is_attached_state "$UDC_STATE"; then
log "🔒 UDC state is '$UDC_STATE' - refusing gadget reset while host attached."
log " Set LESAVKA_ALLOW_GADGET_RESET=1 to force."
exit 0

View File

@ -149,7 +149,14 @@ else
sudo -u "$ORIG_USER" git -C "$SRC_DIR" checkout --force "$REF"
fi
echo "==> 4b. Source build"
echo "==> 4b. Kernel upgrade (optional)"
if [[ "${LESAVKA_KERNEL_UPDATE:-1}" != "0" ]]; then
sudo LESAVKA_KERNEL_BUILD_USER="$ORIG_USER" "$SRC_DIR/scripts/kernel/build-linux-rpi.sh"
else
echo "⚠️ skipping kernel upgrade (LESAVKA_KERNEL_UPDATE=0)"
fi
echo "==> 4c. Source build"
sudo -u "$ORIG_USER" bash -c "cd '$SRC_DIR/server' && cargo clean && cargo build --release --bins"
echo "==> 5. Install binaries"

View File

@ -0,0 +1,110 @@
#!/usr/bin/env bash
# build-linux-rpi.sh - build/install a newer linux-rpi from rpi-6.18.y
set -euo pipefail
if [[ ${EUID:-0} -ne 0 ]]; then
echo "run as root (sudo) to install build deps and kernel packages" >&2
exit 1
fi
BUILD_USER=${LESAVKA_KERNEL_BUILD_USER:-${SUDO_USER:-$(id -un)}}
if [[ -z $BUILD_USER || $BUILD_USER == root ]]; then
echo "missing non-root build user; set LESAVKA_KERNEL_BUILD_USER" >&2
exit 1
fi
KERNEL_REPO=${LESAVKA_KERNEL_REPO:-https://github.com/raspberrypi/linux.git}
KERNEL_BRANCH=${LESAVKA_KERNEL_BRANCH:-rpi-6.18.y}
KERNEL_COMMIT=${LESAVKA_KERNEL_COMMIT:-}
PKGBUILD_REPO=${LESAVKA_KERNEL_PKG_REPO:-https://github.com/archlinuxarm/PKGBUILDs.git}
BUILD_ROOT=${LESAVKA_KERNEL_BUILD_ROOT:-/var/tmp/lesavka-linux-rpi}
PKGREL=${LESAVKA_KERNEL_PKGREL:-2}
JOBS=${LESAVKA_KERNEL_JOBS:-2}
HEARTBEAT=/etc/lesavka/watchdog.touch
if [[ -w $HEARTBEAT && -z ${LESAVKA_DISABLE_KEEPALIVE:-} ]]; then
(while true; do touch "$HEARTBEAT"; sleep 600; done) &
KEEPALIVE_PID=$!
trap 'kill $KEEPALIVE_PID' EXIT
fi
if [[ -z $KERNEL_COMMIT ]]; then
KERNEL_COMMIT=$(git ls-remote "$KERNEL_REPO" "refs/heads/$KERNEL_BRANCH" | awk '{print $1}')
fi
if [[ -z $KERNEL_COMMIT ]]; then
echo "failed to resolve kernel commit for $KERNEL_BRANCH" >&2
exit 1
fi
KERNEL_VERSION=$(
curl -fsSL "https://raw.githubusercontent.com/raspberrypi/linux/$KERNEL_COMMIT/Makefile" |
awk -F' = ' '
/^VERSION =/ {v=$2}
/^PATCHLEVEL =/ {p=$2}
/^SUBLEVEL =/ {s=$2}
END { if (v && p && s) print v "." p "." s }'
)
if [[ -z $KERNEL_VERSION ]]; then
echo "failed to determine kernel version from $KERNEL_COMMIT" >&2
exit 1
fi
TARGET_VERSION="${KERNEL_VERSION}-${PKGREL}"
INSTALLED_VERSION=$(pacman -Qi linux-rpi 2>/dev/null | awk -F': ' '/Version/{print $2}')
if [[ -n $INSTALLED_VERSION && $INSTALLED_VERSION == "$TARGET_VERSION"* ]]; then
echo "linux-rpi already at $TARGET_VERSION"
exit 0
fi
echo "==> Building linux-rpi $KERNEL_VERSION ($KERNEL_COMMIT) pkgrel=$PKGREL"
pacman -Sy --needed --noconfirm git bc kmod inetutils base-devel
rm -rf "$BUILD_ROOT"
mkdir -p "$BUILD_ROOT"
chown "$BUILD_USER":"$BUILD_USER" "$BUILD_ROOT"
sudo -u "$BUILD_USER" git clone --depth 1 "$PKGBUILD_REPO" "$BUILD_ROOT/PKGBUILDs"
cp -a "$BUILD_ROOT/PKGBUILDs/core/linux-rpi" "$BUILD_ROOT/linux-rpi"
chown -R "$BUILD_USER":"$BUILD_USER" "$BUILD_ROOT/linux-rpi"
sudo -u "$BUILD_USER" bash -c "
set -euo pipefail
cd '$BUILD_ROOT/linux-rpi'
sed -i 's/^pkgver=.*/pkgver=$KERNEL_VERSION/' PKGBUILD
sed -i 's/^pkgrel=.*/pkgrel=$PKGREL/' PKGBUILD
sed -i 's/^_commit=.*/_commit=$KERNEL_COMMIT/' PKGBUILD
makepkg -g > /tmp/lesavka-kernel.sums
"
sudo -u "$BUILD_USER" BUILD_ROOT="$BUILD_ROOT" python - <<'PY'
import re
from pathlib import Path
import os
root = Path(os.environ["BUILD_ROOT"])
pkgbuild = root / "linux-rpi" / "PKGBUILD"
sums = Path("/tmp/lesavka-kernel.sums").read_text().splitlines()
text = pkgbuild.read_text()
for line in sums:
if not line.startswith("sha256sums"):
continue
key = line.split("=", 1)[0]
text = re.sub(rf"^{re.escape(key)}=.*$", line, text, flags=re.M)
pkgbuild.write_text(text)
PY
sudo -u "$BUILD_USER" bash -c "
set -euo pipefail
cd '$BUILD_ROOT/linux-rpi'
MAKEFLAGS='-j$JOBS' makepkg -s --noconfirm
"
mapfile -t PKGS < <(ls "$BUILD_ROOT/linux-rpi"/*.pkg.tar.* 2>/dev/null)
if [[ ${#PKGS[@]} -eq 0 ]]; then
echo "no kernel packages built" >&2
exit 1
fi
pacman -U --noconfirm "${PKGS[@]}"
echo "✅ linux-rpi upgraded to $TARGET_VERSION (reboot required)"