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