From 19ae4e8133f370d820c4cdd61a4b703235664a5f Mon Sep 17 00:00:00 2001 From: Jan Schmidt Date: Sun, 20 May 2012 15:42:19 +0200 Subject: Btrfs: fs_info variable for join_transaction Signed-off-by: Jan Schmidt --- fs/btrfs/transaction.c | 37 +++++++++++++++++++------------------ 1 file changed, 19 insertions(+), 18 deletions(-) (limited to 'fs') diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 36422254ef67..eb2bd826bb04 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -55,48 +55,49 @@ static noinline void switch_commit_root(struct btrfs_root *root) static noinline int join_transaction(struct btrfs_root *root, int nofail) { struct btrfs_transaction *cur_trans; + struct btrfs_fs_info *fs_info = root->fs_info; - spin_lock(&root->fs_info->trans_lock); + spin_lock(&fs_info->trans_lock); loop: /* The file system has been taken offline. No new transactions. */ - if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { - spin_unlock(&root->fs_info->trans_lock); + if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) { + spin_unlock(&fs_info->trans_lock); return -EROFS; } - if (root->fs_info->trans_no_join) { + if (fs_info->trans_no_join) { if (!nofail) { - spin_unlock(&root->fs_info->trans_lock); + spin_unlock(&fs_info->trans_lock); return -EBUSY; } } - cur_trans = root->fs_info->running_transaction; + cur_trans = fs_info->running_transaction; if (cur_trans) { if (cur_trans->aborted) { - spin_unlock(&root->fs_info->trans_lock); + spin_unlock(&fs_info->trans_lock); return cur_trans->aborted; } atomic_inc(&cur_trans->use_count); atomic_inc(&cur_trans->num_writers); cur_trans->num_joined++; - spin_unlock(&root->fs_info->trans_lock); + spin_unlock(&fs_info->trans_lock); return 0; } - spin_unlock(&root->fs_info->trans_lock); + spin_unlock(&fs_info->trans_lock); cur_trans = kmem_cache_alloc(btrfs_transaction_cachep, GFP_NOFS); if (!cur_trans) return -ENOMEM; - spin_lock(&root->fs_info->trans_lock); - if (root->fs_info->running_transaction) { + spin_lock(&fs_info->trans_lock); + if (fs_info->running_transaction) { /* * someone started a transaction after we unlocked. Make sure * to redo the trans_no_join checks above */ kmem_cache_free(btrfs_transaction_cachep, cur_trans); - cur_trans = root->fs_info->running_transaction; + cur_trans = fs_info->running_transaction; goto loop; } @@ -127,14 +128,14 @@ loop: INIT_LIST_HEAD(&cur_trans->delayed_refs.seq_head); INIT_LIST_HEAD(&cur_trans->pending_snapshots); - list_add_tail(&cur_trans->list, &root->fs_info->trans_list); + list_add_tail(&cur_trans->list, &fs_info->trans_list); extent_io_tree_init(&cur_trans->dirty_pages, - root->fs_info->btree_inode->i_mapping); - root->fs_info->generation++; - cur_trans->transid = root->fs_info->generation; - root->fs_info->running_transaction = cur_trans; + fs_info->btree_inode->i_mapping); + fs_info->generation++; + cur_trans->transid = fs_info->generation; + fs_info->running_transaction = cur_trans; cur_trans->aborted = 0; - spin_unlock(&root->fs_info->trans_lock); + spin_unlock(&fs_info->trans_lock); return 0; } -- cgit v1.2.3