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36 lines
1.0 KiB
C
36 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_SUBVOLUME_FORMAT_H
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#define _BCACHEFS_SUBVOLUME_FORMAT_H
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#define SUBVOL_POS_MIN POS(0, 1)
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#define SUBVOL_POS_MAX POS(0, S32_MAX)
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#define BCACHEFS_ROOT_SUBVOL 1
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struct bch_subvolume {
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struct bch_val v;
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__le32 flags;
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__le32 snapshot;
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__le64 inode;
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/*
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* Snapshot subvolumes form a tree, separate from the snapshot nodes
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* tree - if this subvolume is a snapshot, this is the ID of the
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* subvolume it was created from:
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*
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* This is _not_ necessarily the subvolume of the directory containing
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* this subvolume:
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*/
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__le32 parent;
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__le32 pad;
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bch_le128 otime;
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};
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LE32_BITMASK(BCH_SUBVOLUME_RO, struct bch_subvolume, flags, 0, 1)
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/*
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* We need to know whether a subvolume is a snapshot so we can know whether we
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* can delete it (or whether it should just be rm -rf'd)
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*/
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LE32_BITMASK(BCH_SUBVOLUME_SNAP, struct bch_subvolume, flags, 1, 2)
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LE32_BITMASK(BCH_SUBVOLUME_UNLINKED, struct bch_subvolume, flags, 2, 3)
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#endif /* _BCACHEFS_SUBVOLUME_FORMAT_H */
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