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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2018 Red Hat, Inc.
* All rights reserved.
*/
#ifndef __LIBXFS_AG_H
#define __LIBXFS_AG_H 1
struct xfs_mount;
struct xfs_trans;
struct xfs_perag;
/*
* perag get/put wrappers for ref counting
*/
int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t);
struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t,
int tag);
void xfs_perag_put(struct xfs_perag *pag);
struct aghdr_init_data {
/* per ag data */
xfs_agblock_t agno; /* ag to init */
xfs_extlen_t agsize; /* new AG size */
struct list_head buffer_list; /* buffer writeback list */
xfs_rfsblock_t nfree; /* cumulative new free space */
/* per header data */
xfs_daddr_t daddr; /* header location */
size_t numblks; /* size of header */
xfs_btnum_t type; /* type of btree root block */
};
int xfs_ag_init_headers(struct xfs_mount *mp, struct aghdr_init_data *id);
int xfs_ag_shrink_space(struct xfs_mount *mp, struct xfs_trans **tpp,
xfs_agnumber_t agno, xfs_extlen_t delta);
int xfs_ag_extend_space(struct xfs_mount *mp, struct xfs_trans *tp,
struct aghdr_init_data *id, xfs_extlen_t len);
int xfs_ag_get_geometry(struct xfs_mount *mp, xfs_agnumber_t agno,
struct xfs_ag_geometry *ageo);
#endif /* __LIBXFS_AG_H */
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