zfs: properly disable zfs-based swap

disk-deactivate/disk-deactivate

@@ -4,5 +4,7 @@ set -efux -o pipefail
 disk=$(realpath "$1")
 
 lsblk -a -f >&2
+# since we currently cannot recursively deactivate swaps on zfs volumes, we need to deactivate all of them.
+lsblk --output-all --json | jq -r -f "$(dirname "$0")/zfs-swap-deactivate.jq" | bash -x
 lsblk --output-all --json | jq -r --arg disk_to_clear "$disk" -f "$(dirname "$0")/disk-deactivate.jq" | bash -x
 lsblk -a -f >&2

disk-deactivate/zfs-swap-deactivate.jq

@@ -0,0 +1,10 @@
+def turnOffSwaps:
+    if (.name | test("^zd[0-9]+$")) and .type == "disk" then
+        "swapoff /dev/" + .name
+    else
+        []
+    end
+;
+
+.blockdevices | map(turnOffSwaps) | flatten | join("\n")
+

flake.nix

@@ -71,6 +71,7 @@
 
           checkJqSyntax = pkgs.runCommand "check-jq-syntax" { nativeBuildInputs = [ pkgs.jq ]; } ''
             echo '{ "blockdevices" : [] }' | jq -r -f ${./disk-deactivate/disk-deactivate.jq} --arg disk_to_clear foo
+            echo '{ "blockdevices" : [] }' | jq -r -f ${./disk-deactivate/zfs-swap-deactivate.jq}
             touch $out
           '';