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Diffstat (limited to 'fs/btrfs/transaction.c')
-rw-r--r--fs/btrfs/transaction.c60
1 files changed, 38 insertions, 22 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 4e83457ea25..cdbb5022da5 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -40,6 +40,12 @@ static noinline void put_transaction(struct btrfs_transaction *transaction)
}
}
+static noinline void switch_commit_root(struct btrfs_root *root)
+{
+ free_extent_buffer(root->commit_root);
+ root->commit_root = btrfs_root_node(root);
+}
+
/*
* either allocate a new transaction or hop into the existing one
*/
@@ -444,9 +450,6 @@ static int update_cowonly_root(struct btrfs_trans_handle *trans,
btrfs_write_dirty_block_groups(trans, root);
- ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);
- BUG_ON(ret);
-
while (1) {
old_root_bytenr = btrfs_root_bytenr(&root->root_item);
if (old_root_bytenr == root->node->start)
@@ -457,13 +460,14 @@ static int update_cowonly_root(struct btrfs_trans_handle *trans,
&root->root_key,
&root->root_item);
BUG_ON(ret);
- btrfs_write_dirty_block_groups(trans, root);
- ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);
+ ret = btrfs_write_dirty_block_groups(trans, root);
BUG_ON(ret);
}
- free_extent_buffer(root->commit_root);
- root->commit_root = btrfs_root_node(root);
+
+ if (root != root->fs_info->extent_root)
+ switch_commit_root(root);
+
return 0;
}
@@ -495,10 +499,12 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans,
root = list_entry(next, struct btrfs_root, dirty_list);
update_cowonly_root(trans, root);
-
- ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);
- BUG_ON(ret);
}
+
+ down_write(&fs_info->extent_commit_sem);
+ switch_commit_root(fs_info->extent_root);
+ up_write(&fs_info->extent_commit_sem);
+
return 0;
}
@@ -544,8 +550,7 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans,
btrfs_update_reloc_root(trans, root);
if (root->commit_root != root->node) {
- free_extent_buffer(root->commit_root);
- root->commit_root = btrfs_root_node(root);
+ switch_commit_root(root);
btrfs_set_root_node(&root->root_item,
root->node);
}
@@ -593,6 +598,7 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly)
return 0;
}
+#if 0
/*
* when dropping snapshots, we generate a ton of delayed refs, and it makes
* sense not to join the transaction while it is trying to flush the current
@@ -681,6 +687,7 @@ int btrfs_drop_dead_root(struct btrfs_root *root)
btrfs_btree_balance_dirty(tree_root, nr);
return ret;
}
+#endif
/*
* new snapshots need to be created at a very specific time in the
@@ -850,6 +857,16 @@ static void update_super_roots(struct btrfs_root *root)
super->root_level = root_item->level;
}
+int btrfs_transaction_in_commit(struct btrfs_fs_info *info)
+{
+ int ret = 0;
+ spin_lock(&info->new_trans_lock);
+ if (info->running_transaction)
+ ret = info->running_transaction->in_commit;
+ spin_unlock(&info->new_trans_lock);
+ return ret;
+}
+
int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
@@ -941,9 +958,11 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
mutex_unlock(&root->fs_info->trans_mutex);
- if (flush_on_commit || snap_pending) {
- if (flush_on_commit)
- btrfs_start_delalloc_inodes(root);
+ if (flush_on_commit) {
+ btrfs_start_delalloc_inodes(root);
+ ret = btrfs_wait_ordered_extents(root, 0);
+ BUG_ON(ret);
+ } else if (snap_pending) {
ret = btrfs_wait_ordered_extents(root, 1);
BUG_ON(ret);
}
@@ -1007,15 +1026,11 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_set_root_node(&root->fs_info->tree_root->root_item,
root->fs_info->tree_root->node);
- free_extent_buffer(root->fs_info->tree_root->commit_root);
- root->fs_info->tree_root->commit_root =
- btrfs_root_node(root->fs_info->tree_root);
+ switch_commit_root(root->fs_info->tree_root);
btrfs_set_root_node(&root->fs_info->chunk_root->root_item,
root->fs_info->chunk_root->node);
- free_extent_buffer(root->fs_info->chunk_root->commit_root);
- root->fs_info->chunk_root->commit_root =
- btrfs_root_node(root->fs_info->chunk_root);
+ switch_commit_root(root->fs_info->chunk_root);
update_super_roots(root);
@@ -1055,6 +1070,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
cur_trans->commit_done = 1;
root->fs_info->last_trans_committed = cur_trans->transid;
+
wake_up(&cur_trans->commit_wait);
put_transaction(cur_trans);
@@ -1081,7 +1097,7 @@ int btrfs_clean_old_snapshots(struct btrfs_root *root)
while (!list_empty(&list)) {
root = list_entry(list.next, struct btrfs_root, root_list);
list_del_init(&root->root_list);
- btrfs_drop_dead_root(root);
+ btrfs_drop_snapshot(root, 0);
}
return 0;
}