2008-01-08 13:46:30 -07:00
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/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __BTRFS_ORDERED_DATA__
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#define __BTRFS_ORDERED_DATA__
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struct btrfs_ordered_inode_tree {
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2008-07-17 10:53:50 -06:00
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struct mutex mutex;
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2008-01-08 13:46:30 -07:00
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struct rb_root tree;
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2008-07-17 10:53:50 -06:00
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struct rb_node *last;
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2008-01-08 13:46:30 -07:00
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};
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2008-07-17 10:53:50 -06:00
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struct btrfs_sector_sum {
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u64 offset;
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u32 sum;
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};
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struct btrfs_ordered_sum {
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u64 file_offset;
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u64 len;
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struct list_head list;
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struct btrfs_sector_sum sums;
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};
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/* bits for the flags field */
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#define BTRFS_ORDERED_IO_DONE 0 /* set when all the pages are written */
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#define BTRFS_ORDERED_COMPLETE 1 /* set when removed from the tree */
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#define BTRFS_ORDERED_START 2 /* set when tree setup */
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struct btrfs_ordered_extent {
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u64 file_offset;
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u64 start;
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u64 len;
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unsigned long flags;
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atomic_t refs;
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struct list_head list;
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struct inode *inode;
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wait_queue_head_t wait;
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struct rb_node rb_node;
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};
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static inline int btrfs_ordered_sum_size(struct btrfs_root *root, u64 bytes)
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{
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unsigned long num_sectors = (bytes + root->sectorsize - 1) /
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root->sectorsize;
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return sizeof(struct btrfs_ordered_sum) +
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num_sectors * sizeof(struct btrfs_sector_sum);
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}
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2008-01-08 13:46:30 -07:00
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static inline void
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btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t)
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{
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mutex_init(&t->mutex);
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t->tree.rb_node = NULL;
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t->last = NULL;
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2008-01-08 13:46:30 -07:00
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}
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2008-07-17 10:53:50 -06:00
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int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry);
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int btrfs_remove_ordered_extent(struct inode *inode,
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struct btrfs_ordered_extent *entry);
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int btrfs_dec_test_ordered_pending(struct inode *inode,
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u64 file_offset, u64 io_size);
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int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
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u64 start, u64 len);
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int btrfs_add_ordered_sum(struct inode *inode, struct btrfs_ordered_sum *sum);
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struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode,
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u64 file_offset);
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void btrfs_wait_ordered_extent(struct inode *inode,
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struct btrfs_ordered_extent *entry);
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void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len);
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struct btrfs_ordered_extent *
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btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset);
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int btrfs_add_ordered_pending(struct inode *inode,
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struct btrfs_ordered_extent *ordered,
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u64 start, u64 len);
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2008-01-08 13:46:30 -07:00
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#endif
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