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authorJosef Bacik <josef@redhat.com>2011-11-02 09:29:35 -0400
committerChris Mason <chris.mason@oracle.com>2011-11-06 03:03:50 -0500
commitc8174313a8102e874aaa321e2fc4c7c460a87151 (patch)
tree366dc804d4b5d0d8c32d70cc554651efa552ba59 /fs
parent5a77d76c243be18d854aa1b14d697525f60e169a (diff)
downloadlinux-stericsson-c8174313a8102e874aaa321e2fc4c7c460a87151.tar.gz
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>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/free-space-cache.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index f49475dfa954..7a15fcfb3e1f 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;
}