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authorJosef Bacik <josef@redhat.com>2011-11-01 14:32:23 -0400
committerChris Mason <chris.mason@oracle.com>2011-11-06 03:03:49 -0500
commit5a77d76c243be18d854aa1b14d697525f60e169a (patch)
treeddf15400e692085b5914297eb2d88989e5246c11 /fs
parent01d658f2ca3c85c1ffb20b306e30d16197000ce7 (diff)
downloadlinux-stericsson-5a77d76c243be18d854aa1b14d697525f60e169a.tar.gz
Btrfs: release metadata from global reserve if we have to fallback for unlink
I fixed a problem where we weren't reserving space for an orphan item when we had to fallback to using the global reserve for an unlink, but I introduced another problem. I was migrating the bytes from the transaction reserve to the global reserve and then releasing from the global reserve in btrfs_end_transaction(). The problem with this is that a migrate will jack up the size for the destination, but leave the size alone for the source, with the idea that you can do a release normally on the source and it all washes out, and then you can do a release again on the destination and it works out right. My way was skipping the release on the trans_block_rsv which still had the jacked up size from our original reservation. So instead release manually from the global reserve if this transaction was using it, and then set the trans->block_rsv back to the trans_block_rsv so that btrfs_end_transaction cleans everything up properly. With this patch xfstest 83 doesn't emit warnings about leaking 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/inode.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 65474d95f26f..a8586e10953c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2904,7 +2904,7 @@ out:
if (!err)
err = btrfs_block_rsv_migrate(trans->block_rsv,
&root->fs_info->global_block_rsv,
- btrfs_calc_trans_metadata_size(root, 1));
+ trans->bytes_reserved);
if (err) {
btrfs_end_transaction(trans, root);
@@ -2920,6 +2920,9 @@ static void __unlink_end_trans(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
if (trans->block_rsv == &root->fs_info->global_block_rsv) {
+ btrfs_block_rsv_release(root, trans->block_rsv,
+ trans->bytes_reserved);
+ trans->block_rsv = &root->fs_info->trans_block_rsv;
BUG_ON(!root->fs_info->enospc_unlink);
root->fs_info->enospc_unlink = 0;
}