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Diffstat (limited to 'fs/btrfs/transaction.h')
| -rw-r--r-- | fs/btrfs/transaction.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h new file mode 100644 index 00000000..fe27379e --- /dev/null +++ b/fs/btrfs/transaction.h @@ -0,0 +1,120 @@ +/* + * Copyright (C) 2007 Oracle. 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 v2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will 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 to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ + +#ifndef __BTRFS_TRANSACTION__ +#define __BTRFS_TRANSACTION__ +#include "btrfs_inode.h" +#include "delayed-ref.h" + +struct btrfs_transaction { + u64 transid; + /* + * total writers in this transaction, it must be zero before the + * transaction can end + */ + atomic_t num_writers; + atomic_t use_count; + + unsigned long num_joined; + + spinlock_t commit_lock; + int in_commit; + int commit_done; + int blocked; + struct list_head list; + struct extent_io_tree dirty_pages; + unsigned long start_time; + wait_queue_head_t writer_wait; + wait_queue_head_t commit_wait; + struct list_head pending_snapshots; + struct btrfs_delayed_ref_root delayed_refs; + int aborted; +}; + +struct btrfs_trans_handle { + u64 transid; + u64 bytes_reserved; + unsigned long use_count; + unsigned long blocks_reserved; + unsigned long blocks_used; + unsigned long delayed_ref_updates; + struct btrfs_transaction *transaction; + struct btrfs_block_rsv *block_rsv; + struct btrfs_block_rsv *orig_rsv; + int aborted; +}; + +struct btrfs_pending_snapshot { + struct dentry *dentry; + struct btrfs_root *root; + struct btrfs_root *snap; + /* block reservation for the operation */ + struct btrfs_block_rsv block_rsv; + /* extra metadata reseration for relocation */ + int error; + bool readonly; + struct list_head list; +}; + +static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans, + struct inode *inode) +{ + BTRFS_I(inode)->last_trans = trans->transaction->transid; + BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid; +} + +int btrfs_end_transaction(struct btrfs_trans_handle *trans, + struct btrfs_root *root); +int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans, + struct btrfs_root *root); +struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, + int num_items); +struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root); +struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root); +struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root); +int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid); +int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans, + struct btrfs_root *root); + +int btrfs_add_dead_root(struct btrfs_root *root); +int btrfs_defrag_root(struct btrfs_root *root, int cacheonly); +int btrfs_clean_old_snapshots(struct btrfs_root *root); +int btrfs_commit_transaction(struct btrfs_trans_handle *trans, + struct btrfs_root *root); +int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + int wait_for_unblock); +int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, + struct btrfs_root *root); +int btrfs_end_transaction_dmeta(struct btrfs_trans_handle *trans, + struct btrfs_root *root); +int btrfs_should_end_transaction(struct btrfs_trans_handle *trans, + struct btrfs_root *root); +void btrfs_throttle(struct btrfs_root *root); +int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans, + struct btrfs_root *root); +int btrfs_write_and_wait_marked_extents(struct btrfs_root *root, + struct extent_io_tree *dirty_pages, int mark); +int btrfs_write_marked_extents(struct btrfs_root *root, + struct extent_io_tree *dirty_pages, int mark); +int btrfs_wait_marked_extents(struct btrfs_root *root, + struct extent_io_tree *dirty_pages, int mark); +int btrfs_transaction_blocked(struct btrfs_fs_info *info); +int btrfs_transaction_in_commit(struct btrfs_fs_info *info); +void put_transaction(struct btrfs_transaction *transaction); +#endif |