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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 <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Josef Bacik 2011-11-02 09:29:35 -04:00 committed by Chris Mason
parent 5a77d76c24
commit c8174313a8
1 changed files with 17 additions and 5 deletions
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22
fs/btrfs/free-space-cache.c
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@ -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;
}