[pbs-devel] [PATCH proxmox-backup v3 6/6] tools: prohibit disk wipe of EFI partition

[Markus Frank]

If the GUID is c12a7328-f81f-11d2-ba4b-00a0c93ec93b the partition is an
EFI Partition and should not be wiped.

Since this GUID is used multiple times, a constant for the EFI & BIOS
GUID is useful.

Signed-off-by: Markus Frank <m.frank at proxmox.com>
---
 src/tools/disks/mod.rs | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/tools/disks/mod.rs b/src/tools/disks/mod.rs
index beb8178b..0fe57d23 100644
--- a/src/tools/disks/mod.rs
+++ b/src/tools/disks/mod.rs
@@ -39,6 +39,9 @@ lazy_static::lazy_static! {
         regex::Regex::new(r"host[^/]*/session[^/]*").unwrap();
 }
 
+const EFI_PARTITION_TYPE: &str = "c12a7328-f81f-11d2-ba4b-00a0c93ec93b";
+const BIOS_PARTITION_TYPE: &str = "21686148-6449-6e6f-744e-656564454649";
+
 /// Disk management context.
 ///
 /// This provides access to disk information with some caching for faster querying of multiple
@@ -844,8 +847,8 @@ fn get_partitions_info(
             if let (Some(devpath), Some(infos)) = (devpath.as_ref(), lsblk_infos.as_ref()) {
                 for info in infos.iter().filter(|i| i.path.eq(devpath)) {
                     used = match info.partition_type.as_deref() {
-                        Some("21686148-6449-6e6f-744e-656564454649") => PartitionUsageType::BIOS,
-                        Some("c12a7328-f81f-11d2-ba4b-00a0c93ec93b") => PartitionUsageType::EFI,
+                        Some(BIOS_PARTITION_TYPE) => PartitionUsageType::BIOS,
+                        Some(EFI_PARTITION_TYPE) => PartitionUsageType::EFI,
                         Some("6a945a3b-1dd2-11b2-99a6-080020736631") => {
                             PartitionUsageType::ZfsReserved
                         }
@@ -1080,6 +1083,12 @@ pub fn wipe_blockdev(disk: &Disk, worker: Arc<WorkerTask>) -> Result<(), Error>
     for disk_info in get_lsblk_info()?.iter() {
         if disk_info.path == disk_path_str && disk_info.partition_type.is_some() {
             is_partition = true;
+            if matches!(
+                disk_info.partition_type.as_deref(),
+                Some(EFI_PARTITION_TYPE)
+            ) {
+                bail!("You will not be able to boot if you wipe the EFI partition.");
+            }
         }
     }
 
-- 
2.39.2