Re: [PATCH] generic/020: Compute correct max_attrs for UBIFS

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On Sun, Jan 14, 2024 at 02:57:13PM +0100, Richard Weinberger wrote:
> When testing on a MTD with a rather small erase block
> size, the default max_attr limit can be too much and the
> test will fail.
> Instead compute the actual limit.
> 
> Signed-off-by: Richard Weinberger <richard@xxxxxx>
> ---

Thanks for the updating for UBIFS testing, this patch looks good to me.
I'm not a good user of ubifs, but as your the maintainer of UBIFS, I
think I can give more trust to this patch ;) So I'll merge this patch
after a basic testing.

Reviewed-by: Zorro Lang <zlang@xxxxxxxxxx>

>  common/config     | 1 +
>  common/ubifs      | 9 +++++++++
>  tests/generic/020 | 6 ++++++
>  3 files changed, 16 insertions(+)
>  create mode 100644 common/ubifs
> 
> diff --git a/common/config b/common/config
> index c9771ff9..05f2bb35 100644
> --- a/common/config
> +++ b/common/config
> @@ -545,6 +545,7 @@ _source_specific_fs()
>  		;;
>  	ubifs)
>  		[ "$UBIUPDATEVOL_PROG" = "" ] && _fatal "ubiupdatevol not found"
> +		. ./common/ubifs
>  		;;
>  	esac
>  }
> diff --git a/common/ubifs b/common/ubifs
> new file mode 100644
> index 00000000..08323260
> --- /dev/null
> +++ b/common/ubifs
> @@ -0,0 +1,9 @@
> +#!/bin/bash
> +# SPDX-License-Identifier: GPL-2.0-only
> +
> +_get_leb_size()
> +{
> +	local ubivol=$1
> +
> +	cat /sys/class/ubi/`basename $ubivol`/usable_eb_size
> +}
> diff --git a/tests/generic/020 b/tests/generic/020
> index da258aa5..4951b9e3 100755
> --- a/tests/generic/020
> +++ b/tests/generic/020
> @@ -101,6 +101,12 @@ _attr_get_max()
>  			let max_attrs=$((($BLOCK_SIZE - 32) / (16 + 12 + 16 )))
>  		fi
>  		;;
> +	ubifs)
> +		LEB_SIZE=`_get_leb_size $TEST_DEV`
> +		# On UBIFS, the number of xattrs has to be less than 50% LEB size
> +		# divided by 160 (inode size)
> +		let max_attrs=$((($LEB_SIZE / 2 / 160) - 1))
> +		;;
>  	*)
>  		# Assume max ~1 block of attrs
>  		BLOCK_SIZE=`_get_block_size $TEST_DIR`
> -- 
> 2.35.3
> 
> 





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