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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2021-2023 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#ifndef __XFS_SCRUB_XFARRAY_H__
#define __XFS_SCRUB_XFARRAY_H__
/* xfile array index type, along with cursor initialization */
typedef uint64_t xfarray_idx_t;
#define XFARRAY_CURSOR_INIT ((__force xfarray_idx_t)0)
/* Iterate each index of an xfile array. */
#define foreach_xfarray_idx(array, idx) \
for ((idx) = XFARRAY_CURSOR_INIT; \
(idx) < xfarray_length(array); \
(idx)++)
struct xfarray {
/* Underlying file that backs the array. */
struct xfile *xfile;
/* Number of array elements. */
xfarray_idx_t nr;
/* Maximum possible array size. */
xfarray_idx_t max_nr;
/* Number of unset slots in the array below @nr. */
uint64_t unset_slots;
/* Size of an array element. */
size_t obj_size;
/* log2 of array element size, if possible. */
int obj_size_log;
};
int xfarray_create(const char *descr, unsigned long long required_capacity,
size_t obj_size, struct xfarray **arrayp);
void xfarray_destroy(struct xfarray *array);
int xfarray_load(struct xfarray *array, xfarray_idx_t idx, void *ptr);
int xfarray_unset(struct xfarray *array, xfarray_idx_t idx);
int xfarray_store(struct xfarray *array, xfarray_idx_t idx, const void *ptr);
int xfarray_store_anywhere(struct xfarray *array, const void *ptr);
bool xfarray_element_is_null(struct xfarray *array, const void *ptr);
/* Append an element to the array. */
static inline int xfarray_append(struct xfarray *array, const void *ptr)
{
return xfarray_store(array, array->nr, ptr);
}
uint64_t xfarray_length(struct xfarray *array);
int xfarray_load_next(struct xfarray *array, xfarray_idx_t *idx, void *rec);
#endif /* __XFS_SCRUB_XFARRAY_H__ */
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