confile: add clearer for lxc.rootfs

src/lxc/confile.c

@@ -123,9 +123,6 @@ static int set_config_fstab(const char *, const char *, struct lxc_conf *);
 static int get_config_fstab(const char *, char *, int, struct lxc_conf *);
 static int clr_config_fstab(const char *, struct lxc_conf *);
 
-static int set_config_rootfs(const char *, const char *, struct lxc_conf *);
-static int get_config_rootfs(const char *, char *, int, struct lxc_conf *);
-
 static int set_config_rootfs_mount(const char *, const char *, struct lxc_conf *);
 static int get_config_rootfs_mount(const char *, char *, int, struct lxc_conf *);
 
@@ -135,6 +132,10 @@ static int get_config_rootfs_options(const char *, char *, int, struct lxc_conf
 static int set_config_rootfs_backend(const char *, const char *, struct lxc_conf *);
 static int get_config_rootfs_backend(const char *, char *, int, struct lxc_conf *);
 
+static int set_config_rootfs(const char *, const char *, struct lxc_conf *);
+static int get_config_rootfs(const char *, char *, int, struct lxc_conf *);
+static int clr_config_rootfs(const char *, struct lxc_conf *);
+
 static int set_config_pivotdir(const char *, const char *, struct lxc_conf *);
 static int get_config_pivotdir(const char *, char *, int, struct lxc_conf *);
 
@@ -246,7 +247,7 @@ static struct lxc_config_t config[] = {
 	{ "lxc.rootfs.mount",         set_config_rootfs_mount,         get_config_rootfs_mount,      NULL },
 	{ "lxc.rootfs.options",       set_config_rootfs_options,       get_config_rootfs_options,    NULL },
 	{ "lxc.rootfs.backend",       set_config_rootfs_backend,       get_config_rootfs_backend,    NULL },
-	{ "lxc.rootfs",               set_config_rootfs,               get_config_rootfs,            NULL },
+	{ "lxc.rootfs",               set_config_rootfs,               get_config_rootfs,            clr_config_rootfs, },
 	{ "lxc.pivotdir",             set_config_pivotdir,             get_config_pivotdir,          NULL },
 	{ "lxc.utsname",              set_config_utsname,              get_config_utsname,           NULL },
 	{ "lxc.hook.pre-start",       set_config_hooks,                get_config_hooks,             NULL },
@@ -2806,10 +2807,6 @@ int lxc_clear_config_item(struct lxc_conf *c, const char *key)
 	} else if (strcmp(key, "lxc.autodev") == 0) {
 		c->autodev = 1;
 
-	} else if (strcmp(key, "lxc.rootfs") == 0) {
-		free(c->rootfs.path);
-		c->rootfs.path = NULL;
-
 	} else if (strcmp(key, "lxc.rootfs.mount") == 0) {
 		free(c->rootfs.mount);
 		c->rootfs.mount = NULL;
@@ -4137,3 +4134,11 @@ static inline int clr_config_fstab(const char *key, struct lxc_conf *c)
 	c->fstab = NULL;
 	return 0;
 }
+
+static inline int clr_config_rootfs(const char *key, struct lxc_conf *c)
+{
+	free(c->rootfs.path);
+	c->rootfs.path = NULL;
+	return 0;
+}
+