| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _BCACHEFS_SNAPSHOT_FORMAT_H |
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| 3 | #define _BCACHEFS_SNAPSHOT_FORMAT_H |
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| 4 | |
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| 5 | struct bch_snapshot { |
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| 6 | struct bch_val v; |
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| 7 | __le32 flags; |
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| 8 | __le32 parent; |
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| 9 | __le32 children[2]; |
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| 10 | __le32 subvol; |
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| 11 | /* corresponds to a bch_snapshot_tree in BTREE_ID_snapshot_trees */ |
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| 12 | __le32 tree; |
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| 13 | __le32 depth; |
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| 14 | __le32 skip[3]; |
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| 15 | bch_le128 btime; |
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| 16 | }; |
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| 17 | |
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| 18 | LE32_BITMASK(BCH_SNAPSHOT_DELETED, struct bch_snapshot, flags, 0, 1) |
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| 19 | |
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| 20 | /* True if a subvolume points to this snapshot node: */ |
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| 21 | LE32_BITMASK(BCH_SNAPSHOT_SUBVOL, struct bch_snapshot, flags, 1, 2) |
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| 22 | |
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| 23 | /* |
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| 24 | * Snapshot trees: |
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| 25 | * |
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| 26 | * The snapshot_trees btree gives us persistent indentifier for each tree of |
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| 27 | * bch_snapshot nodes, and allow us to record and easily find the root/master |
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| 28 | * subvolume that other snapshots were created from: |
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| 29 | */ |
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| 30 | struct bch_snapshot_tree { |
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| 31 | struct bch_val v; |
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| 32 | __le32 master_subvol; |
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| 33 | __le32 root_snapshot; |
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| 34 | }; |
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| 35 | |
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| 36 | #endif /* _BCACHEFS_SNAPSHOT_FORMAT_H */ |
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| 37 | |
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