Update bcachefs sources to 481b5f343248 bcachefs: Better error messages for missing...

[bcachefs-tools-debian] / libbcachefs / snapshot_format.h

diff --git a/libbcachefs/snapshot_format.h b/libbcachefs/snapshot_format.h
new file mode 100644 (file)
index 0000000..aabcd3a
--- /dev/null
+++ b/libbcachefs/snapshot_format.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_SNAPSHOT_FORMAT_H
+#define _BCACHEFS_SNAPSHOT_FORMAT_H
+
+struct bch_snapshot {
+       struct bch_val          v;
+       __le32                  flags;
+       __le32                  parent;
+       __le32                  children[2];
+       __le32                  subvol;
+       /* corresponds to a bch_snapshot_tree in BTREE_ID_snapshot_trees */
+       __le32                  tree;
+       __le32                  depth;
+       __le32                  skip[3];
+       bch_le128               btime;
+};
+
+LE32_BITMASK(BCH_SNAPSHOT_DELETED,     struct bch_snapshot, flags,  0,  1)
+
+/* True if a subvolume points to this snapshot node: */
+LE32_BITMASK(BCH_SNAPSHOT_SUBVOL,      struct bch_snapshot, flags,  1,  2)
+
+/*
+ * Snapshot trees:
+ *
+ * The snapshot_trees btree gives us persistent indentifier for each tree of
+ * bch_snapshot nodes, and allow us to record and easily find the root/master
+ * subvolume that other snapshots were created from:
+ */
+struct bch_snapshot_tree {
+       struct bch_val          v;
+       __le32                  master_subvol;
+       __le32                  root_snapshot;
+};
+
+#endif /* _BCACHEFS_SNAPSHOT_FORMAT_H */