1 /* 2 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. 3 * Copyright (c) 2010 David Chinner. 4 * Copyright (c) 2011 Christoph Hellwig. 5 * All Rights Reserved. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it would be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 #ifndef __XFS_EXTENT_BUSY_H__ 21 #define __XFS_EXTENT_BUSY_H__ 22 23 struct xfs_mount; 24 struct xfs_trans; 25 struct xfs_alloc_arg; 26 27 /* 28 * Busy block/extent entry. Indexed by a rbtree in perag to mark blocks that 29 * have been freed but whose transactions aren't committed to disk yet. 30 * 31 * Note that we use the transaction ID to record the transaction, not the 32 * transaction structure itself. See xfs_extent_busy_insert() for details. 33 */ 34 struct xfs_extent_busy { 35 struct rb_node rb_node; /* ag by-bno indexed search tree */ 36 struct list_head list; /* transaction busy extent list */ 37 xfs_agnumber_t agno; 38 xfs_agblock_t bno; 39 xfs_extlen_t length; 40 unsigned int flags; 41 #define XFS_EXTENT_BUSY_DISCARDED 0x01 /* undergoing a discard op. */ 42 #define XFS_EXTENT_BUSY_SKIP_DISCARD 0x02 /* do not discard */ 43 }; 44 45 void 46 xfs_extent_busy_insert(struct xfs_trans *tp, xfs_agnumber_t agno, 47 xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags); 48 49 void 50 xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list, 51 bool do_discard); 52 53 int 54 xfs_extent_busy_search(struct xfs_mount *mp, xfs_agnumber_t agno, 55 xfs_agblock_t bno, xfs_extlen_t len); 56 57 void 58 xfs_extent_busy_reuse(struct xfs_mount *mp, xfs_agnumber_t agno, 59 xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata); 60 61 void 62 xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t bno, 63 xfs_extlen_t len, xfs_agblock_t *rbno, xfs_extlen_t *rlen); 64 65 int 66 xfs_extent_busy_ag_cmp(void *priv, struct list_head *a, struct list_head *b); 67 68 static inline void xfs_extent_busy_sort(struct list_head *list) 69 { 70 list_sort(NULL, list, xfs_extent_busy_ag_cmp); 71 } 72 73 #endif /* __XFS_EXTENT_BUSY_H__ */ 74