ostree: introduce PAYLOAD_LINK object type

It will be used by successive commits to keep track of the payload
checksum for objects stored in the repository.

The goal is that files having the same payload but different xattrs can
take advantage of reflinks where supported.

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Closes: #1443
Approved by: cgwalters

diff --git a/src/libostree/ostree-core.c b/src/libostree/ostree-core.c
index ba790dc7299f9001f74c9a1257f2ef3e016b74e4..33d6a48bd828dec1781daabf583250d6817ab23b 100644 (file)
--- a/src/libostree/ostree-core.c
+++ b/src/libostree/ostree-core.c
@@ -1239,6 +1239,8 @@ ostree_object_type_to_string (OstreeObjectType objtype)
       return "tombstone-commit";
     case OSTREE_OBJECT_TYPE_COMMIT_META:
       return "commitmeta";
+    case OSTREE_OBJECT_TYPE_PAYLOAD_LINK:
+      return "payload-link";
     default:
       g_assert_not_reached ();
       return NULL;
@@ -1266,6 +1268,8 @@ ostree_object_type_from_string (const char *str)
     return OSTREE_OBJECT_TYPE_TOMBSTONE_COMMIT;
   else if (!strcmp (str, "commitmeta"))
     return OSTREE_OBJECT_TYPE_COMMIT_META;
+  else if (!strcmp (str, "payload-link"))
+    return OSTREE_OBJECT_TYPE_PAYLOAD_LINK;
   g_assert_not_reached ();
   return 0;
 }
@@ -2122,6 +2126,7 @@ _ostree_validate_structureof_metadata (OstreeObjectType objtype,
       break;
     case OSTREE_OBJECT_TYPE_TOMBSTONE_COMMIT:
     case OSTREE_OBJECT_TYPE_COMMIT_META:
+    case OSTREE_OBJECT_TYPE_PAYLOAD_LINK:
       /* TODO */
       break;
     case OSTREE_OBJECT_TYPE_FILE:

diff --git a/src/libostree/ostree-core.h b/src/libostree/ostree-core.h
index 018f5070dd209d4b81ce2c53dab9c62a98b1f5f6..b65c9ba93c3a6ef3c5f18d56548e9a4a6f25c047 100644 (file)
--- a/src/libostree/ostree-core.h
+++ b/src/libostree/ostree-core.h
@@ -68,6 +68,7 @@ G_BEGIN_DECLS
  * @OSTREE_OBJECT_TYPE_COMMIT: Toplevel object, refers to tree and dirmeta for root
  * @OSTREE_OBJECT_TYPE_TOMBSTONE_COMMIT: Toplevel object, refers to a deleted commit
  * @OSTREE_OBJECT_TYPE_COMMIT_META: Detached metadata for a commit
+ * @OSTREE_OBJECT_TYPE_PAYLOAD_LINK: Symlink to a .file given its checksum on the payload only.
  *
  * Enumeration for core object types; %OSTREE_OBJECT_TYPE_FILE is for
  * content, the other types are metadata.
@@ -79,6 +80,7 @@ typedef enum {
   OSTREE_OBJECT_TYPE_COMMIT = 4,              /* .commit */
   OSTREE_OBJECT_TYPE_TOMBSTONE_COMMIT = 5,    /* .commit-tombstone */
   OSTREE_OBJECT_TYPE_COMMIT_META = 6,         /* .commitmeta */
+  OSTREE_OBJECT_TYPE_PAYLOAD_LINK = 7,         /* .payload-link */
 } OstreeObjectType;
 
 /**
@@ -94,7 +96,7 @@ typedef enum {
  *
  * Last valid object type; use this to validate ranges.
  */
-#define OSTREE_OBJECT_TYPE_LAST OSTREE_OBJECT_TYPE_COMMIT_META
+#define OSTREE_OBJECT_TYPE_LAST OSTREE_OBJECT_TYPE_PAYLOAD_LINK
 
 /**
  * OSTREE_DIRMETA_GVARIANT_FORMAT:

diff --git a/src/libostree/ostree-repo.c b/src/libostree/ostree-repo.c
index 20a8839b1aee440bab00c306bf11cde8f0109b7a..8d94f71a55671464294621230312acdcb0e57196 100644 (file)
--- a/src/libostree/ostree-repo.c
+++ b/src/libostree/ostree-repo.c
@@ -3278,6 +3278,8 @@ list_loose_objects_at (OstreeRepo             *self,
         objtype = OSTREE_OBJECT_TYPE_DIR_META;
       else if (strcmp (dot, ".commit") == 0)
         objtype = OSTREE_OBJECT_TYPE_COMMIT;
+      else if (strcmp (dot, ".payload-link") == 0)
+        objtype = OSTREE_OBJECT_TYPE_PAYLOAD_LINK;
       else
         continue;