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From e360c720533dccac39d8b88510b15c21a944b042 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Fri, 13 Nov 2015 18:46:50 +0100
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Subject: [PATCH] core: enable transient unit support for slice units
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Cherry-picked from: 17f62e9bd00f5fefd486475861b06d3ec6b7ee10
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Resolves: #1370299
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---
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src/core/dbus-manager.c | 13 ++++++++++++-
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src/core/slice.c | 1 +
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2 files changed, 13 insertions(+), 1 deletion(-)
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diff --git a/src/core/dbus-manager.c b/src/core/dbus-manager.c
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index 9eef290ca..8d3758ac7 100644
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--- a/src/core/dbus-manager.c
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+++ b/src/core/dbus-manager.c
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@@ -633,7 +633,18 @@ static int transient_unit_from_message(
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if (r < 0)
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return r;
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- if (u->load_state != UNIT_NOT_FOUND ||
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+ /* Check if the unit already exists or is already referenced,
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+ * in a number of different ways. Note that to cater for unit
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+ * types such as slice, we are generally fine with units that
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+ * are marked UNIT_LOADED even even though nothing was
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+ * actually loaded, as those unit types don't require a file
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+ * on disk to validly load. */
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+
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+ if (!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) ||
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+ u->fragment_path ||
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+ u->source_path ||
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+ !strv_isempty(u->dropin_paths) ||
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+ u->refs ||
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set_size(u->dependencies[UNIT_REFERENCED_BY]) > 0)
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return sd_bus_error_setf(error, BUS_ERROR_UNIT_EXISTS, "Unit %s already exists.", name);
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diff --git a/src/core/slice.c b/src/core/slice.c
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index 61ff9d331..9154558b7 100644
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--- a/src/core/slice.c
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+++ b/src/core/slice.c
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@@ -272,6 +272,7 @@ const UnitVTable slice_vtable = {
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.no_alias = true,
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.no_instances = true,
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+ .can_transient = true,
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.load = slice_load,
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