linux-kernel - Re: [PATCH v9 03/11] btrfs: add support for inserting raid stripe extents

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Message-ID: <20230914181052.GC20408@twin.jikos.cz>
Date:   Thu, 14 Sep 2023 20:10:52 +0200
From:   David Sterba <dsterba@...e.cz>
To:     Johannes Thumshirn <johannes.thumshirn@....com>
Cc:     Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>,
        Christoph Hellwig <hch@....de>,
        Naohiro Aota <naohiro.aota@....com>, Qu Wenruo <wqu@...e.com>,
        Damien Le Moal <dlemoal@...nel.org>,
        linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 03/11] btrfs: add support for inserting raid stripe
 extents

On Thu, Sep 14, 2023 at 09:06:58AM -0700, Johannes Thumshirn wrote:
> +	map_type = list_first_entry(&ordered_extent->bioc_list, typeof(*bioc),
> +				    ordered_entry)->map_type;
> +
> +	switch (map_type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
> +	case BTRFS_BLOCK_GROUP_DUP:
> +	case BTRFS_BLOCK_GROUP_RAID1:
> +	case BTRFS_BLOCK_GROUP_RAID1C3:
> +	case BTRFS_BLOCK_GROUP_RAID1C4:
> +		ret = btrfs_insert_mirrored_raid_extents(trans, ordered_extent,
> +							 map_type);
> +		break;
> +	case BTRFS_BLOCK_GROUP_RAID0:
> +		ret = btrfs_insert_striped_raid_extents(trans, ordered_extent,
> +							map_type);
> +		break;
> +	case BTRFS_BLOCK_GROUP_RAID10:
> +		ret = btrfs_insert_striped_mirrored_raid_extents(trans, ordered_extent, map_type);
> +		break;
> +	default:
> +		btrfs_err(trans->fs_info, "unknown block-group profile %lld",
> +			  map_type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
> +		ASSERT(0);

Please don't use ASSERT(0), the error is handled and no need to crash
here.

> +		ret = -EINVAL;
> +		break;
> +	}