proxmox-boot/functions

   1 #! /bin/sh
   2 set -e
   3
   4 ESP_LIST="/etc/kernel/proxmox-boot-uuids"
   5 ESPTYPE='c12a7328-f81f-11d2-ba4b-00a0c93ec93b'
   6
   7 MANUAL_KERNEL_LIST="/etc/kernel/proxmox-boot-manual-kernels"
   8 PINNED_KERNEL_CONF="/etc/kernel/proxmox-boot-pin"
   9 NEXT_BOOT_PIN="/etc/kernel/next-boot-pin"
  10
  11 MOUNTROOT="${TMPDIR:-/var/tmp}/espmounts"
  12 # relative to the ESP mountpoint
  13 PMX_ESP_DIR="EFI/proxmox"
  14 PMX_LOADER_CONF="loader/loader.conf"
  15 GRUB_PIN_SNIPPET="/etc/default/grub.d/proxmox-kernel-pin.cfg"
  16
  17 # adapted from /etc/kernel/postinst.d/apt-auto-removal as present in
  18 # debian's apt package:
  19 #
  20 # Mark as not-for-autoremoval those kernel packages that are:
  21 #  - the currently booted version, if still installed
  22 #  - the kernel version we've been called for
  23 #  - the latest kernel version (as determined by debian version number)
  24 #  - the second-latest kernel version
  25 #  - the latest kernel version of each series (e.g. 4.13, 4.15, 5.0) by
  26 #    marking the meta-packages
  27 #  - the currently pinned kernel if any
  28
  29 kernel_keep_versions() {
  30         eval "$(apt-config shell DPKG Dir::bin::dpkg/f)"
  31         test -n "$DPKG" || DPKG="/usr/bin/dpkg"
  32
  33         list="$("${DPKG}" -l | awk '/^[ih][^nc][ ]+pve-kernel-[0-9]+\./ && $2 !~ /-dbg(:.*)?$/ && $2 !~ /-dbgsym(:.*)?$/ { print $2; }' \
  34            | sed -e 's#^pve-kernel-##' -e 's#:[^:]\+ # #')"
  35
  36         sorted_list="$(echo "$list" | sort --unique --reverse --version-sort)"
  37
  38         [ -n "$1" ] && install_version="$1"
  39
  40         running_version="$(uname -r | tr 'A-Z' 'a-z')"
  41
  42         # ignore the currently running version if attempting a reproducible build
  43         if [ -n "${SOURCE_DATE_EPOCH}" ]; then
  44                 running_version=""
  45         elif [ ! -e "/boot/vmlinuz-$running_version" ]; then
  46                 # ignore the current version if it got removed, the "auto-remove" logic
  47                 # will not be affected, because either it is installed and thus we keep
  48                 # it in the list, or it's already removed anyway
  49                 running_version=""
  50         fi
  51
  52         latest_2_versions="$(echo "$sorted_list" | grep -E '^[^ ]+-pve' | head -n2 )"
  53
  54         series_metapackages="$(echo "$sorted_list" | grep -Ev '^[^ ]+-pve' | head -n2)"
  55
  56         oldseries="$(echo "$series_metapackages" | tail -n1)"
  57         oldseries_latest_kernel="$(echo "$sorted_list" | grep -E "^${oldseries}\.[^ ]+-pve" | head -n1 )"
  58
  59         if [ -e "$MANUAL_KERNEL_LIST" ]; then
  60                 manual_kernels="$(cat "$MANUAL_KERNEL_LIST")"
  61         fi
  62
  63         pinned_kernel="$(get_first_line "$PINNED_KERNEL_CONF")"
  64         nextboot_kernel="$(get_first_line "$NEXT_BOOT_PIN")"
  65
  66         kernels="$(cat <<-EOF
  67                 $running_version
  68                 $install_version
  69                 $manual_kernels
  70                 $latest_2_versions
  71                 $series_metapackages
  72                 $oldseries_latest_kernel
  73                 $pinned_kernel
  74                 $nextboot_kernel
  75                 EOF
  76         )"
  77
  78         echo "$kernels" | sort -u | sed -e '/^$/ d'
  79 }
  80
  81 #bootable kernels are the same as the no_autoremove ones without the meta-package
  82 boot_kernel_list() {
  83         list="$(kernel_keep_versions "$@")"
  84
  85         echo "$list" | grep -vE '^[0-9]+\.[0-9]+$' || true
  86 }
  87
  88 warn() {
  89         echo "$@" 1>&2
  90 }
  91
  92 reexec_in_mountns() {
  93         if [ -z "$PVE_EFIBOOT_UNSHARED" ]; then
  94                 export PVE_EFIBOOT_UNSHARED=1
  95                 echo "Re-executing '$0' in new private mount namespace.."
  96                 unshare --mount --propagation private "$0" "$@"
  97                 exit 0
  98         fi
  99 }
 100
 101 loop_esp_list() {
 102         if [ ! -e ${ESP_LIST} ]; then
 103                 return 2
 104         fi
 105
 106         cat "${ESP_LIST}" | while IFS= read -r curr_uuid; do
 107                 if [ -z "$curr_uuid" ]; then
 108                         continue
 109                 fi
 110                 "$@"
 111         done
 112 }
 113
 114 get_first_line() {
 115         file="$1"
 116         if [ ! -e  "$file" ]; then
 117             echo ""
 118             return
 119         fi
 120
 121         while IFS= read -r line || [ -n "$line" ]; do
 122                 break
 123         done < "${file}"
 124         echo "$line"
 125 }
 126
 127 set_grub_default() {
 128         kver="$1"
 129
 130         if [ -z "${kver}" ]; then
 131                 rm -f "${GRUB_PIN_SNIPPET}"
 132         else
 133                 # grub menu entry ids contain the internal root-device id (e.g. for zfs the GUID of
 134                 # the pool printed in hex) as this is independent of the ESP (or grub location)
 135                 # take it from /boot/grub/grub.cfg
 136                 root_devid=$(sed -rn "s/.*gnulinux-advanced-(.+)['] \{$/\1/p" \
 137                         /boot/grub/grub.cfg)
 138                 entry="gnulinux-advanced-${root_devid}>gnulinux-${kver}-advanced-${root_devid}"
 139                 echo "GRUB_DEFAULT=\"${entry}\"" > "${GRUB_PIN_SNIPPET}"
 140         fi
 141 }
 142
 143 set_systemd_boot_default() {
 144         mountpoint="$1"
 145         kver="$2"
 146         if [ -z "${kver}" ]; then
 147                 entry="proxmox-*"
 148         else
 149                 entry="proxmox-${kver}.conf"
 150         fi
 151
 152         # replaces the current default entry, if one exists else append it at the end of the file
 153         sed -ri "/^default /{h;s/ .*\$/ ${entry}/};\${x;/^$/{s//default ${entry}/;H};x}" \
 154                 "${mountpoint}/$PMX_LOADER_CONF"
 155
 156 }