rootfs.bdev_type: implement get and clear

clear is just set(x, ""), but before this patch that didn't work bc
"" is nota valid bdev type.

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>

diff --git a/src/lxc/confile.c b/src/lxc/confile.c
index 64cce02f064b9eb60349692ce7c80992cb5b5d1b..23107a10bc5fe81f58884a48eac9e1427a1873fe 100644 (file)
--- a/src/lxc/confile.c
+++ b/src/lxc/confile.c
@@ -1859,6 +1859,10 @@ static int config_rootfs_options(const char *key, const char *value,
 static int config_rootfs_bdev_type(const char *key, const char *value,
                               struct lxc_conf *lxc_conf)
 {
+       if (strlen(value) == 0) {
+               free(lxc_conf->rootfs.bdev_type);
+               lxc_conf->rootfs.bdev_type = NULL;
+       }
        if (!is_valid_bdev_type(value)) {
                ERROR("Bad bdev type for %s: %s", key, value);
                return -1;
@@ -2488,6 +2492,8 @@ int lxc_get_config_item(struct lxc_conf *c, const char *key, char *retv,
                v = c->console.path;
        else if (strcmp(key, "lxc.rootfs.mount") == 0)
                v = c->rootfs.mount;
+       else if (strcmp(key, "lxc.rootfs.bdev") == 0)
+               v = c->rootfs.bdev_type;
        else if (strcmp(key, "lxc.rootfs.options") == 0)
                v = c->rootfs.options;
        else if (strcmp(key, "lxc.rootfs") == 0)