[pbs-devel] [PATCH proxmox-backup v4 2/2] fix #5600: pbs2to3: allow arbitrary newer '-pve' kernels after upgrade

[Daniel Kral]

Fixes a bug where `pbs2to3` shows an incorrect warning about an
unexpected running kernel version, where newer kernel versions than 6.5
were marked as unexpected (e.g. "8.6.12-1-pve").

This commit allows arbitrary newer kernel versions that are suffixed
with '-pve' from kernel version 6.2 onward. This is the same behavior as
in other upgrade helpers like `pve7to8` [1] and `pmg7to8` [2].

[1] https://git.proxmox.com/?p=pve-manager.git;a=commit;h=fb59038a8b110b0b0b438ec035fd41dd9d591232
[2] https://git.proxmox.com/?p=pmg-api.git;a=commit;h=9d67a9af218b73027822c9c4665b88e6662e7ef7

Signed-off-by: Daniel Kral <d.kral at proxmox.com>
---
I've used a single regex pattern instead of the two sequential regex
pattern matches in the linked commits from pve-manager and pmg-api,
because I thought it would be a little more readable when only compiling
the regex patterns at one location here.

Changes to v1/v2/v3:
    - Split up kernel version regex to make it a little more readable
    - Include arbitrary newer versions from 6.2 onward ending with '-pve'

 src/bin/pbs2to3.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/bin/pbs2to3.rs b/src/bin/pbs2to3.rs
index d90e62ce..0d6a4b10 100644
--- a/src/bin/pbs2to3.rs
+++ b/src/bin/pbs2to3.rs
@@ -2,6 +2,7 @@ use std::io::Write;
 use std::path::Path;
 
 use anyhow::{format_err, Error};
+use const_format::concatcp;
 use regex::Regex;
 use termcolor::{Color, ColorChoice, ColorSpec, StandardStream, WriteColor};
 
@@ -124,8 +125,11 @@ impl Checker {
     }
 
     fn is_kernel_version_compatible(&self, running_version: &str) -> bool {
+        const MINIMUM_RE: &str = r"6\.(?:2\.(?:[2-9]\d+|1[6-8]|1\d\d+)|5)[^~]*";
+        const ARBITRARY_RE: &str = r"(?:[6-9]|\d{2,})\.(?:[2-9]|\d{2,})[^~]*-pve";
+
         let re = if self.upgraded {
-            r"^6\.(?:2\.(?:[2-9]\d+|1[6-8]|1\d\d+)|5)[^~]*$"
+            concatcp!(r"^(?:", MINIMUM_RE, r"|", ARBITRARY_RE, r")$")
         } else {
             r"^(?:5\.(?:13|15)|6\.2)"
         };
@@ -662,7 +666,7 @@ mod tests {
 
     #[test]
     fn test_is_proxmox_kernel_version_compatible() {
-        let expected_versions = &["6.2.16-20-pve", "6.5.13-6-pve"];
+        let expected_versions = &["6.2.16-20-pve", "6.5.13-6-pve", "6.8.12-1-pve"];
         let unexpected_versions = &["5.13.19-6-pve", "6.1.15-1-pve"];
 
         test_is_kernel_version_compatible(expected_versions, unexpected_versions, true);
-- 
2.39.5