fix: enable qubes memory management to sys-bitcoin

Upstream issue: QubesOS/qubes-issues#8936

Helped-by: Atrate <[email protected]>

salt/sys-bitcoin/create.sls

@@ -1,5 +1,5 @@
 {#
-SPDX-FileCopyrightText: 2024 Benjamin Grande M. S. <[email protected]>
+SPDX-FileCopyrightText: 2024 - 2025 Benjamin Grande M. S. <[email protected]>
 
 SPDX-License-Identifier: AGPL-3.0-or-later
 #}
@@ -87,10 +87,10 @@ features:
 - enable:
   - servicevm
   - service.bitcoin-server
+  - service.meminfo-writer
 - disable:
   - service.cups
   - service.cups-browsed
-  - service.meminfo-writer
 - set:
   - menu-items: "qubes-run-terminal.desktop qubes-start.desktop"
 tags:

salt/sys-bitcoin/files/server/bin/bitcoin-dbcache

@@ -1,11 +1,18 @@
 #!/bin/sh
-## SPDX-FileCopyrightText: 2024 Benjamin Grande M. S. <[email protected]>
+## SPDX-FileCopyrightText: 2024 - 2025 Benjamin Grande M. S. <[email protected]>
 ##
 ## SPDX-License-Identifier: AGPL-3.0-or-later
 
 set -eu
 
 conf="${HOME}/.bitcoin/conf.d/dbcache.conf"
-cache_Mi="$(awk -- '/^MemTotal:/{printf "%.0f", $2/1024}' /proc/meminfo)"
-cache="$((cache_Mi*75/100))"
+domid="$(xenstore-read -- domid)"
+xenstore_mem_dir="/local/domain/${domid}/memory"
+if test -f /var/run/qubes-service/meminfo-writer; then
+  mem_KiB="$(xenstore-read -- "${xenstore_mem_dir}/hotplug-max")"
+else
+  mem_KiB="$(xenstore-read -- "${xenstore_mem_dir}/static-max")"
+fi
+cache_MiB=$((mem_KiB/1024))
+cache="$((cache_MiB*80/100))"
 printf '%s\n' "dbcache=${cache}" | tee -- "${conf}" >/dev/null

salt/sys-bitcoin/install-common.sls

@@ -1,5 +1,5 @@
 {#
-SPDX-FileCopyrightText: 2024 Benjamin Grande M. S. <[email protected]>
+SPDX-FileCopyrightText: 2024 - 2025 Benjamin Grande M. S. <[email protected]>
 
 SPDX-License-Identifier: AGPL-3.0-or-later
 #}
@@ -59,8 +59,8 @@ include:
     - source: salt://{{ slsdotpath }}/files/server/bin/
     - file_mode: '0755'
     - dir_mode: '0755'
-    - user: user
-    - group: user
+    - user: root
+    - group: root
     - makedirs: True
 
 "{{ slsdotpath }}-rpc":