From d6bf8b47ece5ed435cc0e66725fc7afe0ee1550b Mon Sep 17 00:00:00 2001
From: Daniel Hill <daniel@gluo.nz>
Date: Sat, 23 Sep 2023 15:34:38 +1200
Subject: bcachefs: 2023-06-28 -> 2023-09-29

Includes prep work for mainline bcachefs release.
---
 nixos/modules/installer/tools/nixos-generate-config.pl | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'nixos/modules/installer/tools')

diff --git a/nixos/modules/installer/tools/nixos-generate-config.pl b/nixos/modules/installer/tools/nixos-generate-config.pl
index 7d0c5898e23..064d01d05c0 100644
--- a/nixos/modules/installer/tools/nixos-generate-config.pl
+++ b/nixos/modules/installer/tools/nixos-generate-config.pl
@@ -273,6 +273,7 @@ foreach my $path (glob "/sys/class/{block,mmc_host}/*") {
 
 # Add bcache module, if needed.
 my @bcacheDevices = glob("/dev/bcache*");
+@bcacheDevices = grep(!qr#dev/bcachefs.*#, @bcacheDevices);
 if (scalar @bcacheDevices > 0) {
     push @initrdAvailableKernelModules, "bcache";
 }
@@ -483,6 +484,19 @@ EOF
     # boot.tmp.useTmpfs option in configuration.nix (managed declaratively).
     next if ($mountPoint eq "/tmp" && $fsType eq "tmpfs");
 
+    # This should work for single and multi-device systems.
+    # still needs subvolume support
+    if ($fsType eq "bcachefs") {
+        my ($status, @info) = runCommand("bcachefs fs usage $rootDir$mountPoint");
+        my $UUID = $info[0];
+
+        if ($status == 0 && $UUID =~ /^Filesystem:[ \t\n]*([0-9a-z-]+)/) {
+            $stableDevPath = "UUID=$1";
+        } else {
+            print STDERR "warning: can't find bcachefs mount UUID falling back to device-path";
+        }
+    }
+
     # Emit the filesystem.
     $fileSystems .= <<EOF;
   fileSystems.\"$mountPoint\" =
-- 
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