confile: add clearer for lxc.se_context

src/lxc/confile.c

@@ -93,6 +93,7 @@ static int clr_config_lsm_aa_incomplete(const char *, struct lxc_conf *);
 
 static int set_config_lsm_se_context(const char *, const char *, struct lxc_conf *);
 static int get_config_lsm_se_context(const char *, char *, int, struct lxc_conf *);
+static int clr_config_lsm_se_context(const char *, struct lxc_conf *);
 
 static int set_config_cgroup(const char *, const char *, struct lxc_conf *);
 static int get_config_cgroup(const char *, char *, int, struct lxc_conf *);
@@ -227,7 +228,7 @@ static struct lxc_config_t config[] = {
 	{ "lxc.kmsg",                 set_config_kmsg,                 get_config_kmsg,              clr_config_kmsg,              },
 	{ "lxc.aa_profile",           set_config_lsm_aa_profile,       get_config_lsm_aa_profile,    clr_config_lsm_aa_profile,    },
 	{ "lxc.aa_allow_incomplete",  set_config_lsm_aa_incomplete,    get_config_lsm_aa_incomplete, clr_config_lsm_aa_incomplete, },
-	{ "lxc.se_context",           set_config_lsm_se_context,       get_config_lsm_se_context,    NULL },
+	{ "lxc.se_context",           set_config_lsm_se_context,       get_config_lsm_se_context,    clr_config_lsm_se_context,    },
 	{ "lxc.cgroup",               set_config_cgroup,               get_config_cgroup,            NULL },
 	{ "lxc.id_map",               set_config_idmaps,               get_config_idmaps,            NULL },
 	{ "lxc.loglevel",             set_config_loglevel,             get_config_loglevel,          NULL },
@@ -2830,10 +2831,6 @@ int lxc_clear_config_item(struct lxc_conf *c, const char *key)
 		free(c->rootfs.bdev_type);
 		c->rootfs.bdev_type = NULL;
 
-	} else if (strcmp(key, "lxc.se_context") == 0) {
-		free(c->lsm_se_context);
-		c->lsm_se_context = NULL;
-
 	} else if (strcmp(key, "lxc.seccomp") == 0) {
 		free(c->seccomp);
 		c->seccomp = NULL;
@@ -4109,3 +4106,10 @@ static inline int clr_config_lsm_aa_incomplete(const char *key,
 	c->lsm_aa_allow_incomplete = 0;
 	return 0;
 }
+
+static inline int clr_config_lsm_se_context(const char *key, struct lxc_conf *c)
+{
+	free(c->lsm_se_context);
+	c->lsm_se_context = NULL;
+	return 0;
+}