#define BTRFS_ROOT_TRANS_TAG 0
#define BTRFS_ROOT_DEFRAG_TAG 1
-static void put_transaction(struct btrfs_transaction *transaction)
+static noinline void put_transaction(struct btrfs_transaction *transaction)
{
WARN_ON(transaction->use_count == 0);
transaction->use_count--;
}
}
-static int join_transaction(struct btrfs_root *root)
+static noinline int join_transaction(struct btrfs_root *root)
{
struct btrfs_transaction *cur_trans;
cur_trans = root->fs_info->running_transaction;
BUG_ON(!cur_trans);
root->fs_info->generation++;
root->fs_info->running_transaction = cur_trans;
+ root->fs_info->last_alloc = 0;
+ root->fs_info->last_data_alloc = 0;
cur_trans->num_writers = 1;
cur_trans->num_joined = 0;
cur_trans->transid = root->fs_info->generation;
cur_trans->use_count = 1;
cur_trans->commit_done = 0;
cur_trans->start_time = get_seconds();
+ INIT_LIST_HEAD(&cur_trans->pending_snapshots);
list_add_tail(&cur_trans->list, &root->fs_info->trans_list);
- extent_map_tree_init(&cur_trans->dirty_pages,
+ btrfs_ordered_inode_tree_init(&cur_trans->ordered_inode_tree);
+ extent_io_tree_init(&cur_trans->dirty_pages,
root->fs_info->btree_inode->i_mapping,
GFP_NOFS);
} else {
return 0;
}
-static int record_root_in_trans(struct btrfs_root *root)
+static noinline int record_root_in_trans(struct btrfs_root *root)
{
u64 running_trans_id = root->fs_info->running_transaction->transid;
if (root->ref_cows && root->last_trans < running_trans_id) {
int ret;
int err;
int werr = 0;
- struct extent_map_tree *dirty_pages;
+ struct extent_io_tree *dirty_pages;
struct page *page;
struct inode *btree_inode = root->fs_info->btree_inode;
u64 start;
return werr;
}
-int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
- struct btrfs_root *root)
+static int update_cowonly_root(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
{
int ret;
- u64 old_extent_block;
- struct btrfs_fs_info *fs_info = root->fs_info;
- struct btrfs_root *tree_root = fs_info->tree_root;
- struct btrfs_root *extent_root = fs_info->extent_root;
+ u64 old_root_bytenr;
+ struct btrfs_root *tree_root = root->fs_info->tree_root;
- btrfs_write_dirty_block_groups(trans, extent_root);
+ btrfs_write_dirty_block_groups(trans, root);
while(1) {
- old_extent_block = btrfs_root_bytenr(&extent_root->root_item);
- if (old_extent_block == extent_root->node->start)
+ old_root_bytenr = btrfs_root_bytenr(&root->root_item);
+ if (old_root_bytenr == root->node->start)
break;
- btrfs_set_root_bytenr(&extent_root->root_item,
- extent_root->node->start);
- btrfs_set_root_level(&extent_root->root_item,
- btrfs_header_level(extent_root->node));
+ btrfs_set_root_bytenr(&root->root_item,
+ root->node->start);
+ btrfs_set_root_level(&root->root_item,
+ btrfs_header_level(root->node));
ret = btrfs_update_root(trans, tree_root,
- &extent_root->root_key,
- &extent_root->root_item);
+ &root->root_key,
+ &root->root_item);
BUG_ON(ret);
- btrfs_write_dirty_block_groups(trans, extent_root);
+ btrfs_write_dirty_block_groups(trans, root);
}
return 0;
}
-static int wait_for_commit(struct btrfs_root *root,
- struct btrfs_transaction *commit)
+int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
+{
+ struct btrfs_fs_info *fs_info = root->fs_info;
+ struct list_head *next;
+
+ while(!list_empty(&fs_info->dirty_cowonly_roots)) {
+ next = fs_info->dirty_cowonly_roots.next;
+ list_del_init(next);
+ root = list_entry(next, struct btrfs_root, dirty_list);
+ update_cowonly_root(trans, root);
+ }
+ return 0;
+}
+
+static noinline int wait_for_commit(struct btrfs_root *root,
+ struct btrfs_transaction *commit)
{
DEFINE_WAIT(wait);
mutex_lock(&root->fs_info->trans_mutex);
return 0;
}
-static int add_dirty_roots(struct btrfs_trans_handle *trans,
- struct radix_tree_root *radix,
- struct list_head *list)
+static noinline int add_dirty_roots(struct btrfs_trans_handle *trans,
+ struct radix_tree_root *radix,
+ struct list_head *list)
{
struct dirty_root *dirty;
struct btrfs_root *gang[8];
return err;
}
-static int drop_dirty_roots(struct btrfs_root *tree_root,
- struct list_head *list)
+static noinline int drop_dirty_roots(struct btrfs_root *tree_root,
+ struct list_head *list)
{
struct dirty_root *dirty;
struct btrfs_trans_handle *trans;
num_bytes = btrfs_root_used(&dirty->root->root_item);
root = dirty->latest_root;
+ root->fs_info->throttles++;
while(1) {
trans = btrfs_start_transaction(tree_root, 1);
mutex_lock(&tree_root->fs_info->fs_mutex);
}
BUG_ON(ret);
+ root->fs_info->throttles--;
num_bytes -= btrfs_root_used(&dirty->root->root_item);
bytes_used = btrfs_root_used(&root->root_item);
return ret;
}
+int btrfs_write_ordered_inodes(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
+{
+ struct btrfs_transaction *cur_trans = trans->transaction;
+ struct inode *inode;
+ u64 root_objectid = 0;
+ u64 objectid = 0;
+ int ret;
+
+ root->fs_info->throttles++;
+ while(1) {
+ ret = btrfs_find_first_ordered_inode(
+ &cur_trans->ordered_inode_tree,
+ &root_objectid, &objectid, &inode);
+ if (!ret)
+ break;
+
+ mutex_unlock(&root->fs_info->trans_mutex);
+ mutex_unlock(&root->fs_info->fs_mutex);
+
+ if (S_ISREG(inode->i_mode)) {
+ atomic_inc(&BTRFS_I(inode)->ordered_writeback);
+ filemap_fdatawrite(inode->i_mapping);
+ atomic_dec(&BTRFS_I(inode)->ordered_writeback);
+ }
+ iput(inode);
+
+ mutex_lock(&root->fs_info->fs_mutex);
+ mutex_lock(&root->fs_info->trans_mutex);
+ }
+ while(1) {
+ root_objectid = 0;
+ objectid = 0;
+ ret = btrfs_find_del_first_ordered_inode(
+ &cur_trans->ordered_inode_tree,
+ &root_objectid, &objectid, &inode);
+ if (!ret)
+ break;
+ mutex_unlock(&root->fs_info->trans_mutex);
+ mutex_unlock(&root->fs_info->fs_mutex);
+
+ if (S_ISREG(inode->i_mode)) {
+ atomic_inc(&BTRFS_I(inode)->ordered_writeback);
+ filemap_write_and_wait(inode->i_mapping);
+ atomic_dec(&BTRFS_I(inode)->ordered_writeback);
+ }
+ atomic_dec(&inode->i_count);
+ iput(inode);
+
+ mutex_lock(&root->fs_info->fs_mutex);
+ mutex_lock(&root->fs_info->trans_mutex);
+ }
+ root->fs_info->throttles--;
+ return 0;
+}
+
+static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_pending_snapshot *pending)
+{
+ struct btrfs_key key;
+ struct btrfs_root_item *new_root_item;
+ struct btrfs_root *tree_root = fs_info->tree_root;
+ struct btrfs_root *root = pending->root;
+ struct extent_buffer *tmp;
+ int ret;
+ u64 objectid;
+
+ new_root_item = kmalloc(sizeof(*new_root_item), GFP_NOFS);
+ if (!new_root_item) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+ ret = btrfs_find_free_objectid(trans, tree_root, 0, &objectid);
+ if (ret)
+ goto fail;
+
+ memcpy(new_root_item, &root->root_item, sizeof(*new_root_item));
+
+ key.objectid = objectid;
+ key.offset = 1;
+ btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
+
+ extent_buffer_get(root->node);
+ btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp);
+ free_extent_buffer(tmp);
+
+ btrfs_copy_root(trans, root, root->node, &tmp, objectid);
+
+ btrfs_set_root_bytenr(new_root_item, tmp->start);
+ btrfs_set_root_level(new_root_item, btrfs_header_level(tmp));
+ ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,
+ new_root_item);
+ free_extent_buffer(tmp);
+ if (ret)
+ goto fail;
+
+ /*
+ * insert the directory item
+ */
+ key.offset = (u64)-1;
+ ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root,
+ pending->name, strlen(pending->name),
+ root->fs_info->sb->s_root->d_inode->i_ino,
+ &key, BTRFS_FT_DIR);
+
+ if (ret)
+ goto fail;
+
+ ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root,
+ pending->name, strlen(pending->name), objectid,
+ root->fs_info->sb->s_root->d_inode->i_ino);
+fail:
+ kfree(new_root_item);
+ return ret;
+}
+
+static noinline int create_pending_snapshots(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_pending_snapshot *pending;
+ struct list_head *head = &trans->transaction->pending_snapshots;
+ int ret;
+
+ while(!list_empty(head)) {
+ pending = list_entry(head->next,
+ struct btrfs_pending_snapshot, list);
+ ret = create_pending_snapshot(trans, fs_info, pending);
+ BUG_ON(ret);
+ list_del(&pending->list);
+ kfree(pending->name);
+ kfree(pending);
+ }
+ return 0;
+}
+
int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
unsigned long timeout = 1;
struct btrfs_transaction *cur_trans;
struct btrfs_transaction *prev_trans = NULL;
+ struct btrfs_root *chunk_root = root->fs_info->chunk_root;
struct list_head dirty_fs_roots;
- struct extent_map_tree *pinned_copy;
+ struct extent_io_tree *pinned_copy;
DEFINE_WAIT(wait);
int ret;
if (!pinned_copy)
return -ENOMEM;
- extent_map_tree_init(pinned_copy,
+ extent_io_tree_init(pinned_copy,
root->fs_info->btree_inode->i_mapping, GFP_NOFS);
trans->transaction->in_commit = 1;
mutex_lock(&root->fs_info->fs_mutex);
mutex_lock(&root->fs_info->trans_mutex);
finish_wait(&cur_trans->writer_wait, &wait);
+ ret = btrfs_write_ordered_inodes(trans, root);
+
} while (cur_trans->num_writers > 1 ||
(cur_trans->num_joined != joined));
+ ret = create_pending_snapshots(trans, root->fs_info);
+ BUG_ON(ret);
+
WARN_ON(cur_trans != trans->transaction);
+
ret = add_dirty_roots(trans, &root->fs_info->fs_roots_radix,
&dirty_fs_roots);
BUG_ON(ret);
BUG_ON(ret);
cur_trans = root->fs_info->running_transaction;
+ spin_lock(&root->fs_info->new_trans_lock);
root->fs_info->running_transaction = NULL;
+ spin_unlock(&root->fs_info->new_trans_lock);
btrfs_set_super_generation(&root->fs_info->super_copy,
cur_trans->transid);
btrfs_set_super_root(&root->fs_info->super_copy,
btrfs_set_super_root_level(&root->fs_info->super_copy,
btrfs_header_level(root->fs_info->tree_root->node));
+ btrfs_set_super_chunk_root(&root->fs_info->super_copy,
+ chunk_root->node->start);
+ btrfs_set_super_chunk_root_level(&root->fs_info->super_copy,
+ btrfs_header_level(chunk_root->node));
write_extent_buffer(root->fs_info->sb_buffer,
&root->fs_info->super_copy, 0,
sizeof(root->fs_info->super_copy));
void __init btrfs_init_transaction_sys(void)
{
- trans_wq = create_workqueue("btrfs");
+ trans_wq = create_workqueue("btrfs-transaction");
}
void btrfs_exit_transaction_sys(void)
projects / karo-tx-linux.git / blobdiff