diff options
| -rw-r--r-- | fs/btrfs/ordered-data.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index a6c5fc78bc4f..9212ce110cde 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -156,20 +156,22 @@ static struct btrfs_ordered_extent *alloc_ordered_extent( const bool is_nocow = (flags & ((1U << BTRFS_ORDERED_NOCOW) | (1U << BTRFS_ORDERED_PREALLOC))); - if (is_nocow) { - /* For nocow write, we can release the qgroup rsv right now */ + /* + * For a NOCOW write we can free the qgroup reserve right now. For a COW + * one we transfer the reserved space from the inode's iotree into the + * ordered extent by calling btrfs_qgroup_release_data() and tracking + * the qgroup reserved amount in the ordered extent, so that later after + * completing the ordered extent, when running the data delayed ref it + * creates, we free the reserved data with btrfs_qgroup_free_refroot(). + */ + if (is_nocow) ret = btrfs_qgroup_free_data(inode, NULL, file_offset, num_bytes, &qgroup_rsv); - if (ret < 0) - return ERR_PTR(ret); - } else { - /* - * The ordered extent has reserved qgroup space, release now - * and pass the reserved number for qgroup_record to free. - */ + else ret = btrfs_qgroup_release_data(inode, file_offset, num_bytes, &qgroup_rsv); - if (ret < 0) - return ERR_PTR(ret); - } + + if (ret < 0) + return ERR_PTR(ret); + entry = kmem_cache_zalloc(btrfs_ordered_extent_cache, GFP_NOFS); if (!entry) { entry = ERR_PTR(-ENOMEM); |