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bcachefs: subvolume_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 02:42:53 -05:00
parent 8fed323b14
commit c6c4ff6507
2 changed files with 36 additions and 32 deletions
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33
fs/bcachefs/bcachefs_format.h
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@ -773,38 +773,6 @@ struct bch_inline_data {
u8 data[];
};
/* Subvolumes: */
#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)
/* LRU btree: */
struct bch_lru {
@ -872,6 +840,7 @@ struct bch_sb_field {
#include "xattr_format.h"
#include "quota_format.h"
#include "snapshot_format.h"
#include "subvolume_format.h"
#include "sb-counters_format.h"
enum bch_sb_field_type {

35
fs/bcachefs/subvolume_format.h Normal file
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@ -0,0 +1,35 @@
/* 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 */