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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_SNAPSHOT_TYPES_H
#define _BCACHEFS_SNAPSHOT_TYPES_H
#include "bbpos_types.h"
#include "darray.h"
#include "subvolume_types.h"
typedef DARRAY(u32) snapshot_id_list;
#define IS_ANCESTOR_BITMAP 128
struct snapshot_t {
enum snapshot_id_state {
SNAPSHOT_ID_empty,
SNAPSHOT_ID_live,
SNAPSHOT_ID_deleted,
} state;
u32 parent;
u32 skip[3];
u32 depth;
u32 children[2];
u32 subvol; /* Nonzero only if a subvolume points to this node: */
u32 tree;
unsigned long is_ancestor[BITS_TO_LONGS(IS_ANCESTOR_BITMAP)];
};
struct snapshot_table {
struct rcu_head rcu;
size_t nr;
#ifndef RUST_BINDGEN
DECLARE_FLEX_ARRAY(struct snapshot_t, s);
#else
struct snapshot_t s[0];
#endif
};
struct snapshot_interior_delete {
u32 id;
u32 live_child;
};
typedef DARRAY(struct snapshot_interior_delete) interior_delete_list;
struct snapshot_delete {
struct mutex lock;
struct work_struct work;
struct mutex progress_lock;
snapshot_id_list deleting_from_trees;
snapshot_id_list delete_leaves;
interior_delete_list delete_interior;
bool running;
struct bbpos pos;
};
#endif /* _BCACHEFS_SNAPSHOT_TYPES_H */
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