62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/*
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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_TRANSACTION_H__
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#define __BTRFS_TRANSACTION_H__
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struct btrfs_trans_handle {
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u64 transid;
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u64 alloc_exclude_start;
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u64 alloc_exclude_nr;
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unsigned long blocks_reserved;
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unsigned long blocks_used;
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struct btrfs_block_group_cache *block_group;
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};
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static inline struct btrfs_trans_handle *
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btrfs_start_transaction(struct btrfs_root *root, int num_blocks)
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{
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struct btrfs_fs_info *fs_info = root->fs_info;
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struct btrfs_trans_handle *h = malloc(sizeof(*h));
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BUG_ON(!h);
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BUG_ON(root->commit_root);
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BUG_ON(fs_info->running_transaction);
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fs_info->running_transaction = h;
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fs_info->generation++;
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h->transid = fs_info->generation;
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h->alloc_exclude_start = 0;
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h->alloc_exclude_nr = 0;
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h->blocks_reserved = num_blocks;
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h->blocks_used = 0;
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h->block_group = NULL;
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root->last_trans = h->transid;
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root->commit_root = root->node;
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extent_buffer_get(root->node);
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return h;
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}
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static inline void btrfs_free_transaction(struct btrfs_root *root,
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struct btrfs_trans_handle *handle)
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{
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memset(handle, 0, sizeof(*handle));
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free(handle);
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}
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#endif
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