diff options
Diffstat (limited to 'fs/btrfs/transaction.c')
| -rw-r--r-- | fs/btrfs/transaction.c | 36 |
1 files changed, 17 insertions, 19 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 51dcec86757f..654755b18951 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -260,7 +260,7 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, { struct btrfs_trans_handle *h; struct btrfs_transaction *cur_trans; - int retries = 0; + u64 num_bytes = 0; int ret; if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) @@ -274,6 +274,19 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, h->block_rsv = NULL; goto got_it; } + + /* + * Do the reservation before we join the transaction so we can do all + * the appropriate flushing if need be. + */ + if (num_items > 0 && root != root->fs_info->chunk_root) { + num_bytes = btrfs_calc_trans_metadata_size(root, num_items); + ret = btrfs_block_rsv_add(NULL, root, + &root->fs_info->trans_block_rsv, + num_bytes); + if (ret) + return ERR_PTR(ret); + } again: h = kmem_cache_alloc(btrfs_trans_handle_cachep, GFP_NOFS); if (!h) @@ -310,24 +323,9 @@ again: goto again; } - if (num_items > 0) { - ret = btrfs_trans_reserve_metadata(h, root, num_items); - if (ret == -EAGAIN && !retries) { - retries++; - btrfs_commit_transaction(h, root); - goto again; - } else if (ret == -EAGAIN) { - /* - * We have already retried and got EAGAIN, so really we - * don't have space, so set ret to -ENOSPC. - */ - ret = -ENOSPC; - } - - if (ret < 0) { - btrfs_end_transaction(h, root); - return ERR_PTR(ret); - } + if (num_bytes) { + h->block_rsv = &root->fs_info->trans_block_rsv; + h->bytes_reserved = num_bytes; } got_it: |