Add support for TuxOnIce hibernation

systemd does not support non-mainline kernel features so upstream rejected this
patch.
It is however required for systemd integration by tuxonice-userui package.

Forwarded: http://lists.freedesktop.org/archives/systemd-devel/2014-April/018960.html

Gbp-Pq: Topic debian
Gbp-Pq: Name Add-support-for-TuxOnIce-hibernation.patch

diff --git a/src/shared/sleep-config.c b/src/shared/sleep-config.c
index 1632132b903ac739d97c5e1e1db98214d56649d8..0e48db8ff33e860c7c1b322906da98c0407def56 100644 (file)
--- a/src/shared/sleep-config.c
+++ b/src/shared/sleep-config.c
@@ -961,6 +961,12 @@ static bool enough_swap_for_hibernation(void) {
         if (getenv_bool("SYSTEMD_BYPASS_HIBERNATION_MEMORY_CHECK") > 0)
                 return true;
 
+        /* TuxOnIce is an alternate implementation for hibernation.
+         * It can be configured to compress the image to a file or an inactive
+         * swap partition, so there's nothing more we can do here. */
+        if (access("/sys/power/tuxonice", F_OK) == 0)
+                return true;
+
         r = find_hibernate_location(&hibernate_location);
         if (r < 0)
                 return false;