storage: add lxc_storage_get_path()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/src/lxc/bdev/bdev.c b/src/lxc/bdev/bdev.c
index ea1bca17a14d2eaabe52f04acf2478778710a474..48f2c2759b05015dcbcedd088eff54b1872b2e57 100644 (file)
--- a/src/lxc/bdev/bdev.c
+++ b/src/lxc/bdev/bdev.c
@@ -609,3 +609,14 @@ bool rootfs_is_blockdev(struct lxc_conf *conf)
 
        return false;
 }
+
+char *lxc_storage_get_path(char *src, const char *prefix)
+{
+       size_t prefix_len;
+
+       prefix_len = strlen(prefix);
+       if (!strncmp(src, prefix, prefix_len) && (*(src + prefix_len) == ':'))
+               return (src + prefix_len + 1);
+
+       return src;
+}

diff --git a/src/lxc/bdev/bdev.h b/src/lxc/bdev/bdev.h
index b723b5080887fe9ab8783c26bf4ea7aad4e30bd9..22133173aefeb8a0a80e135d4267c9bc878abaa9 100644 (file)
--- a/src/lxc/bdev/bdev.h
+++ b/src/lxc/bdev/bdev.h
@@ -125,5 +125,6 @@ bool bdev_destroy(struct lxc_conf *conf);
 /* callback function to be used with userns_exec_1() */
 int bdev_destroy_wrapper(void *data);
 extern bool rootfs_is_blockdev(struct lxc_conf *conf);
+extern char *lxc_storage_get_path(char *src, const char *prefix);
 
 #endif // __LXC_BDEV_H