1 // SPDX-License-Identifier: GPL-2.0 2 /* 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 11 struct xfs_mount; 12 struct xfs_perag; 13 struct xfs_trans; 14 struct xfs_alloc_arg; 15 16 /* 17 * Busy block/extent entry. Indexed by a rbtree in perag to mark blocks that 18 * have been freed but whose transactions aren't committed to disk yet. 19 * 20 * Note that we use the transaction ID to record the transaction, not the 21 * transaction structure itself. See xfs_extent_busy_insert() for details. 22 */ 23 struct xfs_extent_busy { 24 struct rb_node rb_node; /* ag by-bno indexed search tree */ 25 struct list_head list; /* transaction busy extent list */ 26 xfs_agnumber_t agno; 27 xfs_agblock_t bno; 28 xfs_extlen_t length; 29 unsigned int flags; 30 #define XFS_EXTENT_BUSY_DISCARDED 0x01 /* undergoing a discard op. */ 31 #define XFS_EXTENT_BUSY_SKIP_DISCARD 0x02 /* do not discard */ 32 }; 33 34 void 35 xfs_extent_busy_insert(struct xfs_trans *tp, struct xfs_perag *pag, 36 xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags); 37 38 void 39 xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list, 40 bool do_discard); 41 42 int 43 xfs_extent_busy_search(struct xfs_mount *mp, struct xfs_perag *pag, 44 xfs_agblock_t bno, xfs_extlen_t len); 45 46 void 47 xfs_extent_busy_reuse(struct xfs_mount *mp, struct xfs_perag *pag, 48 xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata); 49 50 bool 51 xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t *bno, 52 xfs_extlen_t *len, unsigned *busy_gen); 53 54 int 55 xfs_extent_busy_flush(struct xfs_trans *tp, struct xfs_perag *pag, 56 unsigned busy_gen, uint32_t alloc_flags); 57 58 void 59 xfs_extent_busy_wait_all(struct xfs_mount *mp); 60 61 int 62 xfs_extent_busy_ag_cmp(void *priv, const struct list_head *a, 63 const struct list_head *b); 64 65 static inline void xfs_extent_busy_sort(struct list_head *list) 66 { 67 list_sort(NULL, list, xfs_extent_busy_ag_cmp); 68 } 69 70 #endif /* __XFS_EXTENT_BUSY_H__ */ 71