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core/cgroup: thaw slice of unit when thawing unit

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This ensures starting a new unit under a frozen slice work as expected.

(cherry picked from commit a14137d90e)
This commit is contained in:
msizanoen1 2022-12-07 16:32:05 +07:00 committed by Zbigniew Jędrzejewski-Szmek
parent 5c1e5944c0
commit 8798badd2c
1 changed files with 14 additions and 0 deletions
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14
src/core/cgroup.c
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@ -4166,9 +4166,23 @@ int unit_cgroup_freezer_action(Unit *u, FreezerAction action) {
if (!cg_freezer_supported())
return 0;
/* Ignore all requests to thaw init.scope or -.slice and reject all requests to freeze them */
if (unit_has_name(u, SPECIAL_ROOT_SLICE) || unit_has_name(u, SPECIAL_INIT_SCOPE))
return action == FREEZER_FREEZE ? -EPERM : 0;
if (!u->cgroup_realized)
return -EBUSY;
if (action == FREEZER_THAW) {
Unit *slice = UNIT_GET_SLICE(u);
if (slice) {
r = unit_cgroup_freezer_action(slice, FREEZER_THAW);
if (r < 0)
return log_unit_error_errno(u, r, "Failed to thaw slice %s of unit: %m", slice->id);
}
}
target = action == FREEZER_FREEZE ? FREEZER_FROZEN : FREEZER_RUNNING;
r = unit_freezer_state_kernel(u, &kernel);