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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.4 * Copyright (c) 2010 David Chinner.5 * Copyright (c) 2011 Christoph Hellwig.6 * All Rights Reserved.7 */8#ifndef __XFS_EXTENT_BUSY_H__9#define __XFS_EXTENT_BUSY_H__10 11struct xfs_mount;12struct xfs_perag;13struct xfs_trans;14struct xfs_alloc_arg;15 16/*17 * Busy block/extent entry. Indexed by a rbtree in perag to mark blocks that18 * have been freed but whose transactions aren't committed to disk yet.19 */20struct xfs_extent_busy {21 struct rb_node rb_node; /* ag by-bno indexed search tree */22 struct list_head list; /* transaction busy extent list */23 xfs_agnumber_t agno;24 xfs_agblock_t bno;25 xfs_extlen_t length;26 unsigned int flags;27#define XFS_EXTENT_BUSY_DISCARDED 0x01 /* undergoing a discard op. */28#define XFS_EXTENT_BUSY_SKIP_DISCARD 0x02 /* do not discard */29};30 31/*32 * List used to track groups of related busy extents all the way through33 * to discard completion.34 */35struct xfs_busy_extents {36 struct xfs_mount *mount;37 struct list_head extent_list;38 struct work_struct endio_work;39 40 /*41 * Owner is the object containing the struct xfs_busy_extents to free42 * once the busy extents have been processed. If only the43 * xfs_busy_extents object needs freeing, then point this at itself.44 */45 void *owner;46};47 48void49xfs_extent_busy_insert(struct xfs_trans *tp, struct xfs_perag *pag,50 xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);51 52void53xfs_extent_busy_insert_discard(struct xfs_perag *pag, xfs_agblock_t bno,54 xfs_extlen_t len, struct list_head *busy_list);55 56void57xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,58 bool do_discard);59 60int61xfs_extent_busy_search(struct xfs_mount *mp, struct xfs_perag *pag,62 xfs_agblock_t bno, xfs_extlen_t len);63 64void65xfs_extent_busy_reuse(struct xfs_mount *mp, struct xfs_perag *pag,66 xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);67 68bool69xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t *bno,70 xfs_extlen_t *len, unsigned *busy_gen);71 72int73xfs_extent_busy_flush(struct xfs_trans *tp, struct xfs_perag *pag,74 unsigned busy_gen, uint32_t alloc_flags);75 76void77xfs_extent_busy_wait_all(struct xfs_mount *mp);78 79int80xfs_extent_busy_ag_cmp(void *priv, const struct list_head *a,81 const struct list_head *b);82 83static inline void xfs_extent_busy_sort(struct list_head *list)84{85 list_sort(NULL, list, xfs_extent_busy_ag_cmp);86}87 88bool xfs_extent_busy_list_empty(struct xfs_perag *pag);89 90#endif /* __XFS_EXTENT_BUSY_H__ */91