From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- fs/xfs/xfs_extent_busy.h | 73 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 fs/xfs/xfs_extent_busy.h (limited to 'fs/xfs/xfs_extent_busy.h') diff --git a/fs/xfs/xfs_extent_busy.h b/fs/xfs/xfs_extent_busy.h new file mode 100644 index 000000000..bfff284d2 --- /dev/null +++ b/fs/xfs/xfs_extent_busy.h @@ -0,0 +1,73 @@ +/* + * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. + * Copyright (c) 2010 David Chinner. + * Copyright (c) 2011 Christoph Hellwig. + * All Rights Reserved. + * + * 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. + * + * 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_EXTENT_BUSY_H__ +#define __XFS_EXTENT_BUSY_H__ + +struct xfs_mount; +struct xfs_trans; +struct xfs_alloc_arg; + +/* + * Busy block/extent entry. Indexed by a rbtree in perag to mark blocks that + * have been freed but whose transactions aren't committed to disk yet. + * + * Note that we use the transaction ID to record the transaction, not the + * transaction structure itself. See xfs_extent_busy_insert() for details. + */ +struct xfs_extent_busy { + struct rb_node rb_node; /* ag by-bno indexed search tree */ + struct list_head list; /* transaction busy extent list */ + xfs_agnumber_t agno; + xfs_agblock_t bno; + xfs_extlen_t length; + unsigned int flags; +#define XFS_EXTENT_BUSY_DISCARDED 0x01 /* undergoing a discard op. */ +#define XFS_EXTENT_BUSY_SKIP_DISCARD 0x02 /* do not discard */ +}; + +void +xfs_extent_busy_insert(struct xfs_trans *tp, xfs_agnumber_t agno, + xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags); + +void +xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list, + bool do_discard); + +int +xfs_extent_busy_search(struct xfs_mount *mp, xfs_agnumber_t agno, + xfs_agblock_t bno, xfs_extlen_t len); + +void +xfs_extent_busy_reuse(struct xfs_mount *mp, xfs_agnumber_t agno, + xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata); + +void +xfs_extent_busy_trim(struct xfs_alloc_arg *args, xfs_agblock_t bno, + xfs_extlen_t len, xfs_agblock_t *rbno, xfs_extlen_t *rlen); + +int +xfs_extent_busy_ag_cmp(void *priv, struct list_head *a, struct list_head *b); + +static inline void xfs_extent_busy_sort(struct list_head *list) +{ + list_sort(NULL, list, xfs_extent_busy_ag_cmp); +} + +#endif /* __XFS_EXTENT_BUSY_H__ */ -- cgit v1.2.3-54-g00ecf