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Inhibit system suspend during update

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Create and destroy /run/lock/power_override/fwupd.lock.
This file will hold the contents of getpid (), which will
stop the device from being suspended while the file exists.
The file will be created and written just before the
update is put into motion and be destroyed once the update
finishes, or upon restart in case of catastrophic failure.

Change-Id: If8dd17b0358862a842c9589e11ed0de12d852797
This commit is contained in:
Twain Byrnes 2021-07-09 22:14:14 +00:00 committed by Richard Hughes
parent c381b334eb
commit eed815331c
1 changed files with 52 additions and 0 deletions
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52
plugins/powerd/fu-plugin-powerd.c
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@ -20,6 +20,43 @@ fu_plugin_init(FuPlugin *plugin)
fu_plugin_alloc_data(plugin, sizeof(FuPluginData));
}
static gboolean
fu_plugin_powerd_create_suspend_file(GError **error)
{
g_autofree gchar *lockdir = NULL;
g_autofree gchar *inhibitsuspend_filename = NULL;
g_autofree gchar *getpid_str = NULL;
lockdir = fu_common_get_path(FU_PATH_KIND_LOCKDIR);
inhibitsuspend_filename = g_build_filename(lockdir, "power_override", "fwupd.lock", NULL);
getpid_str = g_strdup_printf("%d", getpid());
if (!g_file_set_contents(inhibitsuspend_filename, getpid_str, -1, error)) {
g_prefix_error(error, "lock file unable to be created");
return FALSE;
}
return TRUE;
}
static gboolean
fu_plugin_powerd_delete_suspend_file(GError **error)
{
g_autoptr(GError) local_error = NULL;
g_autofree gchar *lockdir = NULL;
g_autoptr(GFile) inhibitsuspend_file = NULL;
lockdir = fu_common_get_path(FU_PATH_KIND_LOCKDIR);
inhibitsuspend_file =
g_file_new_build_filename(lockdir, "power_override", "fwupd.lock", NULL);
if (!g_file_delete(inhibitsuspend_file, NULL, &local_error) &&
!g_error_matches(local_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND)) {
g_propagate_prefixed_error(error,
g_steal_pointer(&local_error),
"lock file unable to be deleted");
return FALSE;
}
return TRUE;
}
void
fu_plugin_destroy(FuPlugin *plugin)
{
@ -70,6 +107,9 @@ fu_plugin_startup(FuPlugin *plugin, GError **error)
FuPluginData *data = fu_plugin_get_data(plugin);
g_autofree gchar *name_owner = NULL;
if (!fu_plugin_powerd_delete_suspend_file(error))
return FALSE;
/* establish proxy for method call to powerd */
data->proxy = g_dbus_proxy_new_for_bus_sync(G_BUS_TYPE_SYSTEM,
G_DBUS_PROXY_FLAGS_NONE,
@ -99,3 +139,15 @@ fu_plugin_startup(FuPlugin *plugin, GError **error)
return TRUE;
}
gboolean
fu_plugin_update_prepare(FuPlugin *plugin, FwupdInstallFlags flags, FuDevice *dev, GError **error)
{
return fu_plugin_powerd_create_suspend_file(error);
}
gboolean
fu_plugin_update_cleanup(FuPlugin *plugin, FwupdInstallFlags flags, FuDevice *dev, GError **error)
{
return fu_plugin_powerd_delete_suspend_file(error);
}