- /*
- * ret != 0 here means the qgroup reservation failed, we go straight to
- * the shared error handling then.
- */
- if (ret == 0)
- ret = reserve_metadata_bytes(root, block_rsv,
- to_reserve, flush);
-
- if (ret) {
- u64 to_free = 0;
- unsigned dropped;
-
- spin_lock(&BTRFS_I(inode)->lock);
- dropped = drop_outstanding_extent(inode);
- /*
- * If the inodes csum_bytes is the same as the original
- * csum_bytes then we know we haven't raced with any free()ers
- * so we can just reduce our inodes csum bytes and carry on.
- * Otherwise we have to do the normal free thing to account for
- * the case that the free side didn't free up its reserve
- * because of this outstanding reservation.
- */
- if (BTRFS_I(inode)->csum_bytes == csum_bytes)
- calc_csum_metadata_size(inode, num_bytes, 0);
- else
- to_free = calc_csum_metadata_size(inode, num_bytes, 0);
- spin_unlock(&BTRFS_I(inode)->lock);
- if (dropped)
- to_free += btrfs_calc_trans_metadata_size(root, dropped);
-
- if (to_free) {
- btrfs_block_rsv_release(root, block_rsv, to_free);
- trace_btrfs_space_reservation(root->fs_info,
- "delalloc",
- btrfs_ino(inode),
- to_free, 0);
- }
- if (root->fs_info->quota_enabled) {
+ ret = reserve_metadata_bytes(root, block_rsv, to_reserve, flush);
+ if (unlikely(ret)) {
+ if (root->fs_info->quota_enabled)