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bcachefs: snapshot_format.h

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-01-21 02:41:06 -05:00
parent d455179fce
commit 8fed323b14
2 changed files with 37 additions and 33 deletions
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34
fs/bcachefs/bcachefs_format.h
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@ -805,39 +805,6 @@ LE32_BITMASK(BCH_SUBVOLUME_RO, struct bch_subvolume, flags, 0, 1)
LE32_BITMASK(BCH_SUBVOLUME_SNAP, struct bch_subvolume, flags, 1, 2) LE32_BITMASK(BCH_SUBVOLUME_SNAP, struct bch_subvolume, flags, 1, 2)
LE32_BITMASK(BCH_SUBVOLUME_UNLINKED, struct bch_subvolume, flags, 2, 3) LE32_BITMASK(BCH_SUBVOLUME_UNLINKED, struct bch_subvolume, flags, 2, 3)
/* Snapshots */
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;
};
/* LRU btree: */ /* LRU btree: */
struct bch_lru { struct bch_lru {
@ -904,6 +871,7 @@ struct bch_sb_field {
#include "dirent_format.h" #include "dirent_format.h"
#include "xattr_format.h" #include "xattr_format.h"
#include "quota_format.h" #include "quota_format.h"
#include "snapshot_format.h"
#include "sb-counters_format.h" #include "sb-counters_format.h"
enum bch_sb_field_type { enum bch_sb_field_type {

36
fs/bcachefs/snapshot_format.h Normal file
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@ -0,0 +1,36 @@
/* 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 */