mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 04:18:39 +08:00
b8628a2529
Record the filesystem path heirarchy for subvolumes in bch_subvolume Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
36 lines
1.0 KiB
C
36 lines
1.0 KiB
C
/* 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 creation_parent;
|
|
__le32 fs_path_parent;
|
|
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 */
|