From c8174313a8102e874aaa321e2fc4c7c460a87151 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Wed, 2 Nov 2011 09:29:35 -0400 Subject: Btrfs: use the global reserve when truncating the free space cache inode We no longer use the orphan block rsv for holding the reservation for truncating the inode, so instead use the global block rsv and check to make sure it has enough space for us to truncate the space. Thanks, Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/free-space-cache.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) (limited to 'fs/btrfs/free-space-cache.c') diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index f49475dfa95..7a15fcfb3e1 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -198,14 +198,24 @@ int btrfs_truncate_free_space_cache(struct btrfs_root *root, struct inode *inode) { struct btrfs_block_rsv *rsv; + u64 needed_bytes; loff_t oldsize; int ret = 0; rsv = trans->block_rsv; - trans->block_rsv = root->orphan_block_rsv; - ret = btrfs_block_rsv_check(root, root->orphan_block_rsv, 5); - if (ret) - return ret; + trans->block_rsv = &root->fs_info->global_block_rsv; + + /* 1 for slack space, 1 for updating the inode */ + needed_bytes = btrfs_calc_trunc_metadata_size(root, 1) + + btrfs_calc_trans_metadata_size(root, 1); + + spin_lock(&trans->block_rsv->lock); + if (trans->block_rsv->reserved < needed_bytes) { + spin_unlock(&trans->block_rsv->lock); + trans->block_rsv = rsv; + return -ENOSPC; + } + spin_unlock(&trans->block_rsv->lock); oldsize = i_size_read(inode); btrfs_i_size_write(inode, 0); @@ -218,13 +228,15 @@ int btrfs_truncate_free_space_cache(struct btrfs_root *root, ret = btrfs_truncate_inode_items(trans, root, inode, 0, BTRFS_EXTENT_DATA_KEY); - trans->block_rsv = rsv; if (ret) { + trans->block_rsv = rsv; WARN_ON(1); return ret; } ret = btrfs_update_inode(trans, root, inode); + trans->block_rsv = rsv; + return ret; } -- cgit v1.2.3