/* * Copyright (C) 2016 Oracle. All Rights Reserved. * * Author: Darrick J. Wong <darrick.wong@oracle.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it would be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef __XFS_REFCOUNT_H__ #define __XFS_REFCOUNT_H__ extern int xfs_refcount_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno, int *stat); extern int xfs_refcount_lookup_ge(struct xfs_btree_cur *cur, xfs_agblock_t bno, int *stat); extern int xfs_refcount_get_rec(struct xfs_btree_cur *cur, struct xfs_refcount_irec *irec, int *stat); enum xfs_refcount_intent_type { XFS_REFCOUNT_INCREASE = 1, XFS_REFCOUNT_DECREASE, XFS_REFCOUNT_ALLOC_COW, XFS_REFCOUNT_FREE_COW, }; struct xfs_refcount_intent { struct list_head ri_list; enum xfs_refcount_intent_type ri_type; xfs_fsblock_t ri_startblock; xfs_extlen_t ri_blockcount; }; extern int xfs_refcount_increase_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, struct xfs_bmbt_irec *irec); extern int xfs_refcount_decrease_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, struct xfs_bmbt_irec *irec); extern void xfs_refcount_finish_one_cleanup(struct xfs_trans *tp, struct xfs_btree_cur *rcur, int error); extern int xfs_refcount_finish_one(struct xfs_trans *tp, struct xfs_defer_ops *dfops, enum xfs_refcount_intent_type type, xfs_fsblock_t startblock, xfs_extlen_t blockcount, xfs_fsblock_t *new_fsb, xfs_extlen_t *new_len, struct xfs_btree_cur **pcur); extern int xfs_refcount_find_shared(struct xfs_btree_cur *cur, xfs_agblock_t agbno, xfs_extlen_t aglen, xfs_agblock_t *fbno, xfs_extlen_t *flen, bool find_end_of_shared); extern int xfs_refcount_alloc_cow_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, xfs_fsblock_t fsb, xfs_extlen_t len); extern int xfs_refcount_free_cow_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, xfs_fsblock_t fsb, xfs_extlen_t len); extern int xfs_refcount_recover_cow_leftovers(struct xfs_mount *mp, xfs_agnumber_t agno); #endif /* __XFS_REFCOUNT_H__ */