[pve-devel] [PATCH container 2/4] add a check_kernel_release helper

[Wolfgang Bumiller]

Should this go to pve-common?

Signed-off-by: Wolfgang Bumiller <w.bumiller at proxmox.com>
---
 src/PVE/LXC.pm | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/PVE/LXC.pm b/src/PVE/LXC.pm
index c590fc8..9e25ad4 100644
--- a/src/PVE/LXC.pm
+++ b/src/PVE/LXC.pm
@@ -464,6 +464,30 @@ sub get_cgroup_subsystems {
 	return wantarray ? ($v1, $v2) : $v1;
 }
 
+# Check if the kernel is at least $major.$minor. Return either just a boolean,
+# or a boolean and the kernel version's major minor numbers we parsed out of
+# uname's release string.
+sub check_kernel_release {
+    my ($major, $minor) = @_;
+
+    my (undef, undef, $release) = POSIX::uname();
+
+    my ($result, $k_major, $k_minor) = (0, 'unknown', 'unknown');
+
+    if ($release =~ /^(\d+)\.(\d+)(?:$|\.)/) {
+	($k_major, $k_minor) = ($1, $2);
+
+	if (defined($minor)) {
+	    $result = $k_major > $major
+		|| ($k_major == $major && $k_minor >= $minor);
+	} else {
+	    $result = $k_major >= $major;
+	}
+    }
+
+    return wantarray ? ($result, "$k_major.$k_minor") : $result;
+}
+
 # With seccomp trap to userspace we now have the ability to optionally forward
 # certain syscalls to the "host" to handle (via our pve-lxc-syscalld daemon).
 #
-- 
2.20.1