[pve-devel] [PATCH pve-kernel-meta 3/5] proxmox-boot: refresh based on bootloader config instead of bootmode

[Stoiko Ivanov <s.ivanov@proxmox.com>]

ignore the current bootmode (uefi/legacy) when deciding which configs
to generate - make this decision based on the found boot loader
configs on the ESP.

Change systemd-boot to load the kernel+initrd from the ESPs root where
grub needs them. This prevents the double use of space for systems
having both boot-loaders present (since FAT does not support
symlinks). While this is against the recommendations of the
boot-loader-specification [0]) it works fine (and we deviate from [0]
by not having the machine-id in the kernel subdirs anyways).
The UEFI spec on the directory structure [1], also should be fine with
it.

Additionally adapt the output of `p-b-t status` to the new paths

[0] https://systemd.io/BOOT_LOADER_SPECIFICATION/
[1] section 13.3.1.3 of
https://uefi.org/sites/default/files/resources/UEFI_Spec_2_9_2021_03_18.pdf

Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
---
 bin/proxmox-boot-tool        | 14 +++----
 proxmox-boot/zz-proxmox-boot | 78 ++++++++++++------------------------
 2 files changed, 32 insertions(+), 60 deletions(-)

diff --git a/bin/proxmox-boot-tool b/bin/proxmox-boot-tool
index 5197f5b..320f49b 100755
--- a/bin/proxmox-boot-tool
+++ b/bin/proxmox-boot-tool
@@ -396,20 +396,18 @@ _status_detail() {
 
 	result=""
 	if [ -f "${mountpoint}/$PMX_LOADER_CONF" ]; then
-		if [ ! -d "${mountpoint}/$PMX_ESP_DIR" ]; then
-			warn "${path}/$PMX_ESP_DIR does not exist"
-		fi
-		versions_uefi=$(ls -1 ${mountpoint}/$PMX_ESP_DIR | awk '{printf (NR>1?", ":"") $0}')
-		result="uefi (versions: ${versions_uefi})"
+		result="uefi"
 	fi
 	if [ -d "${mountpoint}/grub" ]; then
-		versions_grub=$(ls -1 ${mountpoint}/vmlinuz-* | awk '{ gsub(/.*\/vmlinuz-/, ""); printf (NR>1?", ":"") $0 }')
 		if [ -n "$result" ]; then
-		    result="${result}, grub (versions: ${versions_grub})"
+			result="${result}, grub"
 		else
-		    result="grub (versions: ${versions_grub})"
+			result="grub"
 		fi
 	fi
+	versions=$(find "${mountpoint}" -maxdepth 1 -name 'vmlinuz-*' | awk '{ gsub(/.*\/vmlinuz-/, ""); printf (NR>1?", ":"") $0 }')
+	result="${result} (versions: ${versions})"
+
 	echo "$curr_uuid is configured with: $result"
 	umount "${mountpoint}" || \
 		{ warn "umount of ${path} failed - failure"; exit 0; }
diff --git a/proxmox-boot/zz-proxmox-boot b/proxmox-boot/zz-proxmox-boot
index 5fe16a6..244373d 100755
--- a/proxmox-boot/zz-proxmox-boot
+++ b/proxmox-boot/zz-proxmox-boot
@@ -75,33 +75,33 @@ update_esp_func() {
 		{ warn "creation of mountpoint ${mountpoint} failed - skipping"; return; }
 	mount "${path}" "${mountpoint}" || \
 		{ warn "mount of ${path} failed - skipping"; return; }
-	if [ -d /sys/firmware/efi ]; then
-		if [ ! -f "${mountpoint}/$PMX_LOADER_CONF" ]; then
-			warn "${path} contains no loader.conf - skipping"
-			return
-		fi
-		if [ ! -d "${mountpoint}/$PMX_ESP_DIR" ]; then
-			warn "${path}/$PMX_ESP_DIR does not exist- skipping"
-			return
-		fi
-	elif [ ! -d "${mountpoint}/grub" ]; then
-		warn "${path} contains no grub directory - skipping"
+	sd_boot=""
+	grub=""
+	if [ -f "${mountpoint}/$PMX_LOADER_CONF" ]; then
+		sd_boot=1
+	fi
+	if [ -d "${mountpoint}/grub" ]; then
+		grub=1
+	fi
+	if [ -z "$sd_boot" ] && [ -z "$grub" ]; then
+		warn "${path} contains no bootloader config - skipping!"
 		return
 	fi
 	warn "Copying and configuring kernels on ${path}"
-	copy_and_config_kernels "${mountpoint}"
+	copy_and_config_kernels "${mountpoint}" "${sd_boot}"
 
 	pinned_kernel=$(get_first_line "${PINNED_KERNEL_CONF}")
 
 	if [ -e "${NEXT_BOOT_PIN}" ]; then
 	    pinned_kernel=$(get_first_line "${NEXT_BOOT_PIN}")
 	fi
-	if [ -d /sys/firmware/efi ]; then
+	if [ -n "$sd_boot" ]; then
 		set_systemd_boot_default "${mountpoint}" "${pinned_kernel}"
-		remove_old_kernels_efi "${mountpoint}"
-	else
+		remove_old_kernels "${mountpoint}"
+	fi
+	if [ -n "$grub" ]; then
 		set_grub_default "${pinned_kernel}"
-		remove_old_kernels_legacy "${mountpoint}"
+		remove_old_kernels "${mountpoint}"
 		mount --bind "${mountpoint}" "/boot"
 		update-grub
 		umount /boot
@@ -116,7 +116,7 @@ update_esp_func() {
 
 copy_and_config_kernels() {
 	esp="$1"
-
+	sd_boot="$2"
 
 	for kver in ${BOOT_KVERS}; do
 
@@ -132,52 +132,25 @@ copy_and_config_kernels() {
 			continue
 		fi
 
-		if [ -d /sys/firmware/efi ]; then
-
-			warn "	Copying kernel and creating boot-entry for ${kver}"
-			KERNEL_ESP_DIR="${PMX_ESP_DIR}/${kver}"
-			KERNEL_LIVE_DIR="${esp}/${KERNEL_ESP_DIR}"
-			mkdir -p "${KERNEL_LIVE_DIR}"
-			cp --preserve=timestamps "${linux_image}" "${KERNEL_LIVE_DIR}/"
-			cp --preserve=timestamps "${initrd}" "${KERNEL_LIVE_DIR}/"
+		warn "	Copying kernel and creating boot-entry for ${kver}"
+		cp --preserve=timestamps "${linux_image}" "${esp}/"
+		cp --preserve=timestamps "${initrd}" "${esp}/"
 
-			# create loader entry
+		if [ -n "$sd_boot" ]; then
+		# create loader entry
 			cat > "${esp}/loader/entries/proxmox-${kver}.conf" <<- EOF
 				title    ${LOADER_TITLE}
 				version  ${kver}
 				options  ${CMDLINE}
-				linux    /${KERNEL_ESP_DIR}/vmlinuz-${kver}
-				initrd   /${KERNEL_ESP_DIR}/initrd.img-${kver}
+				linux    /vmlinuz-${kver}
+				initrd   /initrd.img-${kver}
 			EOF
-		else
-			warn "	Copying kernel ${kver}"
-			cp --preserve=timestamps "${linux_image}" "${esp}/"
-			cp --preserve=timestamps "${initrd}" "${esp}/"
-		fi
-	done
-
-}
-
-remove_old_kernels_efi() {
-	esp="$1"
-
-	for kerneldir in "${esp}/${PMX_ESP_DIR}"/*; do
-		if [ ! -d "${kerneldir}" ]; then
-			warn "	${kerneldir} is not a directory - skipping"
-			continue
 		fi
-
-		kver="$(echo "${kerneldir}" | sed -r "s#^${esp}/${PMX_ESP_DIR}/(.+)\$#\\1#")"
-
-		echo "${BOOT_KVERS}" | grep -q "${kver}" && continue;
-		warn "	Removing old version ${kver}"
-		rm -rf "${kerneldir}"
-		rm -f "${esp}/loader/entries/proxmox-${kver}.conf"
 	done
 
 }
 
-remove_old_kernels_legacy() {
+remove_old_kernels() {
 	esp="$1"
 
 	for kernel in "${esp}/"vmlinuz-*; do
@@ -187,6 +160,7 @@ remove_old_kernels_legacy() {
 		warn "	Removing old version ${kver}"
 		rm -rf "${esp}/vmlinuz-${kver}"
 		rm -rf "${esp}/initrd.img-${kver}"
+		rm -rf "${esp}/loader/entries/proxmox-${kver}.conf"
 	done
 
 }
-- 
2.30.2