linux-kernel - Re: [PATCH 2/3] btrfs: replace stripe extents

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Message-ID: <20240610194352.GB235772@perftesting>
Date: Mon, 10 Jun 2024 15:43:52 -0400
From: Josef Bacik <josef@...icpanda.com>
To: Johannes Thumshirn <jth@...nel.org>
Cc: Chris Mason <clm@...com>, David Sterba <dsterba@...e.com>,
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
	Johannes Thumshirn <johannes.thumshirn@....com>
Subject: Re: [PATCH 2/3] btrfs: replace stripe extents

On Mon, Jun 10, 2024 at 10:40:26AM +0200, Johannes Thumshirn wrote:
> From: Johannes Thumshirn <johannes.thumshirn@....com>
> 
> If we can't insert a stripe extent in the RAID stripe tree, because
> the key that points to the specific position in the stripe tree is
> already existing, we have to remove the item and then replace it by a
> new item.
> 
> This can happen for example on device replace operations.
> 
> Signed-off-by: Johannes Thumshirn <johannes.thumshirn@....com>
> ---
>  fs/btrfs/ctree.c            |  1 +
>  fs/btrfs/raid-stripe-tree.c | 34 ++++++++++++++++++++++++++++++++++
>  2 files changed, 35 insertions(+)
> 
> diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
> index 1a49b9232990..ad934c5469c4 100644
> --- a/fs/btrfs/ctree.c
> +++ b/fs/btrfs/ctree.c
> @@ -3844,6 +3844,7 @@ static noinline int setup_leaf_for_split(struct btrfs_trans_handle *trans,
>  	btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
>  
>  	BUG_ON(key.type != BTRFS_EXTENT_DATA_KEY &&
> +	       key.type != BTRFS_RAID_STRIPE_KEY &&

This seems unrelated.  Thanks,

Josef