machine-image: add a generic API to determine metadata of any image

This adds an internal API that permits querying metadata from any type
of image, including both subvol/dir images, and raw/block images. In the
latter case we use the new dissection API we just added.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/shared/machine-image.h b/src/shared/machine-image.h
index 1b1194e442..9573000a5a 100644
--- a/src/shared/machine-image.h
+++ b/src/shared/machine-image.h
@@ -53,6 +53,13 @@ typedef struct Image {
         uint64_t limit;
         uint64_t limit_exclusive;
 
+        char *hostname;
+        sd_id128_t machine_id;
+        char **machine_info;
+        char **os_release;
+
+        bool metadata_valid;
+
         void *userdata;
 } Image;
 
@@ -80,6 +87,8 @@ int image_name_lock(const char *name, int operation, LockFile *ret);
 
 int image_set_limit(Image *i, uint64_t referenced_max);
 
+int image_read_metadata(Image *i);
+
 static inline bool IMAGE_IS_HIDDEN(const struct Image *i) {
         assert(i);