| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | /* |
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| 3 | * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. |
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| 4 | * Copyright (c) 2010 David Chinner. |
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| 5 | * Copyright (c) 2011 Christoph Hellwig. |
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| 6 | * All Rights Reserved. |
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| 7 | */ |
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| 8 | #ifndef __XFS_EXTENT_BUSY_H__ |
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| 9 | #define __XFS_EXTENT_BUSY_H__ |
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| 10 | |
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| 11 | struct xfs_mount; |
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| 12 | struct xfs_perag; |
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| 13 | struct xfs_trans; |
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| 14 | struct xfs_alloc_arg; |
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| 15 | |
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| 16 | /* |
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| 17 | * Busy block/extent entry. Indexed by a rbtree in perag to mark blocks that |
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| 18 | * have been freed but whose transactions aren't committed to disk yet. |
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| 19 | */ |
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| 20 | struct xfs_extent_busy { |
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| 21 | struct rb_node rb_node; /* ag by-bno indexed search tree */ |
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| 22 | struct list_head list; /* transaction busy extent list */ |
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| 23 | xfs_agnumber_t agno; |
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| 24 | xfs_agblock_t bno; |
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| 25 | xfs_extlen_t length; |
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| 26 | unsigned int flags; |
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| 27 | #define XFS_EXTENT_BUSY_DISCARDED 0x01 /* undergoing a discard op. */ |
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| 28 | #define XFS_EXTENT_BUSY_SKIP_DISCARD 0x02 /* do not discard */ |
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| 29 | }; |
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| 30 | |
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| 31 | /* |
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| 32 | * List used to track groups of related busy extents all the way through |
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| 33 | * to discard completion. |
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| 34 | */ |
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| 35 | struct xfs_busy_extents { |
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| 36 | struct xfs_mount *mount; |
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| 37 | struct list_head extent_list; |
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| 38 | struct work_struct endio_work; |
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| 39 | |
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| 40 | /* |
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| 41 | * Owner is the object containing the struct xfs_busy_extents to free |
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| 42 | * once the busy extents have been processed. If only the |
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| 43 | * xfs_busy_extents object needs freeing, then point this at itself. |
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| 44 | */ |
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| 45 | void *owner; |
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| 46 | }; |
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| 47 | |
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| 48 | void |
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| 49 | xfs_extent_busy_insert(struct xfs_trans *tp, struct xfs_perag *pag, |
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| 50 | xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags); |
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| 51 | |
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| 52 | void |
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| 53 | xfs_extent_busy_insert_discard(struct xfs_perag *pag, xfs_agblock_t bno, |
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| 54 | xfs_extlen_t len, struct list_head *busy_list); |
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| 55 | |
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| 56 | void |
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| 57 | xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list, |
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| 58 | bool do_discard); |
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| 59 | |
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| 60 | int |
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| 61 | xfs_extent_busy_search(struct xfs_mount *mp, struct xfs_perag *pag, |
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| 62 | xfs_agblock_t bno, xfs_extlen_t len); |
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| 63 | |
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| 64 | void |
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| 65 | xfs_extent_busy_reuse(struct xfs_mount *mp, struct xfs_perag *pag, |
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| 66 | xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata); |
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| 67 | |
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| 68 | bool |
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| 69 | xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t *bno, |
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| 70 | xfs_extlen_t *len, unsigned *busy_gen); |
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| 71 | |
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| 72 | int |
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| 73 | xfs_extent_busy_flush(struct xfs_trans *tp, struct xfs_perag *pag, |
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| 74 | unsigned busy_gen, uint32_t alloc_flags); |
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| 75 | |
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| 76 | void |
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| 77 | xfs_extent_busy_wait_all(struct xfs_mount *mp); |
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| 78 | |
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| 79 | int |
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| 80 | xfs_extent_busy_ag_cmp(void *priv, const struct list_head *a, |
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| 81 | const struct list_head *b); |
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| 82 | |
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| 83 | static inline void xfs_extent_busy_sort(struct list_head *list) |
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| 84 | { |
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| 85 | list_sort(NULL, head: list, cmp: xfs_extent_busy_ag_cmp); |
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| 86 | } |
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| 87 | |
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| 88 | #endif /* __XFS_EXTENT_BUSY_H__ */ |
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| 89 | |
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