nixos/btrfs autoScrub: don't fail when scrub finishes successfully

symphorien · Apr 2, 2020 · 55d16d5 · 55d16d5
1 parent ae6bdcc
commit 55d16d5
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/nixos/modules/tasks/filesystems/btrfs.nix b/nixos/modules/tasks/filesystems/btrfs.nix
@@ -128,7 +128,10 @@ in
             Nice = 19;
             IOSchedulingClass = "idle";
             ExecStart = "${pkgs.btrfs-progs}/bin/btrfs scrub start -B ${fs}";
-            ExecStop  = "${pkgs.btrfs-progs}/bin/btrfs scrub cancel ${fs}";
+            # if the service is stopped before scrub end, cancel it
+            ExecStop  = pkgs.writeShellScript "btrfs-scrub-maybe-cancel" ''
+              (${pkgs.btrfs-progs}/bin/btrfs scrub status ${fs} | ${pkgs.gnugrep}/bin/grep finished) || ${pkgs.btrfs-progs}/bin/btrfs scrub cancel ${fs}
+            '';
           };
         };
       in listToAttrs (map scrubService cfgScrub.fileSystems);