Btrfs: add compat ioctl

[linux-2.6-block.git] / fs / btrfs / transaction.c

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index f0f03121b7b260a75d50930334b9f4249557cab5..bf7eef67ba0b4ecf231baddf9fca55fdfeccec4c 100644 (file)
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -8,6 +8,8 @@ static int total_trans = 0;
 extern struct kmem_cache *btrfs_trans_handle_cachep;
 extern struct kmem_cache *btrfs_transaction_cachep;
 
+static struct workqueue_struct *trans_wq;
+
 #define BTRFS_ROOT_TRANS_TAG 0
 
 #define TRANS_MAGIC 0xE1E10E
@@ -44,6 +46,7 @@ static int join_transaction(struct btrfs_root *root)
                cur_trans->in_commit = 0;
                cur_trans->use_count = 1;
                cur_trans->commit_done = 0;
+               cur_trans->start_time = get_seconds();
                list_add_tail(&cur_trans->list, &root->fs_info->trans_list);
                init_bit_radix(&cur_trans->dirty_pages);
        }
@@ -350,3 +353,60 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
        return ret;
 }
 
+void btrfs_transaction_cleaner(struct work_struct *work)
+{
+       struct btrfs_fs_info *fs_info = container_of(work,
+                                                    struct btrfs_fs_info,
+                                                    trans_work.work);
+
+       struct btrfs_root *root = fs_info->tree_root;
+       struct btrfs_transaction *cur;
+       struct btrfs_trans_handle *trans;
+       unsigned long now;
+       unsigned long delay = HZ * 30;
+       int ret;
+
+printk("btrfs transaction cleaner\n");
+       mutex_lock(&root->fs_info->fs_mutex);
+       mutex_lock(&root->fs_info->trans_mutex);
+       cur = root->fs_info->running_transaction;
+       if (!cur) {
+               mutex_unlock(&root->fs_info->trans_mutex);
+               goto out;
+       }
+       now = get_seconds();
+       if (now < cur->start_time || now - cur->start_time < 30) {
+               mutex_unlock(&root->fs_info->trans_mutex);
+               delay = HZ * 5;
+               goto out;
+       }
+       mutex_unlock(&root->fs_info->trans_mutex);
+printk("forcing commit\n");
+       trans = btrfs_start_transaction(root, 1);
+       ret = btrfs_commit_transaction(trans, root);
+out:
+       mutex_unlock(&root->fs_info->fs_mutex);
+       btrfs_transaction_queue_work(root, delay);
+}
+
+void btrfs_transaction_queue_work(struct btrfs_root *root, int delay)
+{
+       queue_delayed_work(trans_wq, &root->fs_info->trans_work, delay);
+}
+
+void btrfs_transaction_flush_work(struct btrfs_root *root)
+{
+       cancel_rearming_delayed_workqueue(trans_wq, &root->fs_info->trans_work);
+       flush_workqueue(trans_wq);
+}
+
+void __init btrfs_init_transaction_sys(void)
+{
+       trans_wq = create_workqueue("btrfs");
+}
+
+void __exit btrfs_exit_transaction_sys(void)
+{
+       destroy_workqueue(trans_wq);
+}
+