d1310b2e0c
There is now extent_map for mapping offsets in the file to disk and extent_io for state tracking, IO submission and extent_bufers. The new extent_map code shifts from [start,end] pairs to [start,len], and pushes the locking out into the caller. This allows a few performance optimizations and is easier to use. A number of extent_map usage bugs were fixed, mostly with failing to remove extent_map entries when changing the file. Signed-off-by: Chris Mason <chris.mason@oracle.com>
105 lines
3.2 KiB
C
105 lines
3.2 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__
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#define __BTRFS_TRANSACTION__
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#include "btrfs_inode.h"
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#include "ordered-data.h"
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struct btrfs_transaction {
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u64 transid;
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unsigned long num_writers;
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unsigned long num_joined;
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int in_commit;
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int use_count;
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int commit_done;
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struct list_head list;
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struct extent_io_tree dirty_pages;
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unsigned long start_time;
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struct btrfs_ordered_inode_tree ordered_inode_tree;
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wait_queue_head_t writer_wait;
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wait_queue_head_t commit_wait;
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struct list_head pending_snapshots;
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};
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struct btrfs_trans_handle {
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u64 transid;
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unsigned long blocks_reserved;
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unsigned long blocks_used;
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struct btrfs_transaction *transaction;
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struct btrfs_block_group_cache *block_group;
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u64 alloc_exclude_start;
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u64 alloc_exclude_nr;
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};
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struct btrfs_pending_snapshot {
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struct btrfs_root *root;
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char *name;
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struct list_head list;
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};
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static inline void btrfs_set_trans_block_group(struct btrfs_trans_handle *trans,
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struct inode *inode)
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{
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trans->block_group = BTRFS_I(inode)->block_group;
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}
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static inline void btrfs_update_inode_block_group(struct
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btrfs_trans_handle *trans,
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struct inode *inode)
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{
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BTRFS_I(inode)->block_group = trans->block_group;
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}
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static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
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struct inode *inode)
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{
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BTRFS_I(inode)->last_trans = trans->transaction->transid;
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}
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int btrfs_end_transaction(struct btrfs_trans_handle *trans,
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struct btrfs_root *root);
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struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
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int num_blocks);
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int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
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struct btrfs_root *root);
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int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
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struct btrfs_root *root);
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#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
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void btrfs_transaction_cleaner(void *p);
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#else
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void btrfs_transaction_cleaner(struct work_struct *work);
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#endif
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void btrfs_transaction_flush_work(struct btrfs_root *root);
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void btrfs_transaction_queue_work(struct btrfs_root *root, int delay);
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void btrfs_init_transaction_sys(void);
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void btrfs_exit_transaction_sys(void);
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int btrfs_add_dead_root(struct btrfs_root *root, struct btrfs_root *latest,
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struct list_head *dead_list);
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int btrfs_defrag_dirty_roots(struct btrfs_fs_info *info);
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int btrfs_defrag_root(struct btrfs_root *root, int cacheonly);
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int btrfs_clean_old_snapshots(struct btrfs_root *root);
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int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
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struct btrfs_root *root);
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int btrfs_write_ordered_inodes(struct btrfs_trans_handle *trans,
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struct btrfs_root *root);
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#endif
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