mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 20:22:09 +00:00
37 lines
952 B
C
37 lines
952 B
C
/* 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 */
|