linux-ext4 - Re: [PATCH] e2scrub: reorder exit status check after calling lvremove

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Message-ID: <20250706182812.GB2672022@frogsfrogsfrogs>
Date: Sun, 6 Jul 2025 11:28:12 -0700
From: "Darrick J. Wong" <djwong@...nel.org>
To: Samuel Smith <satlug@...153.net>
Cc: linux-ext4@...r.kernel.org, tytso@....edu
Subject: Re: [PATCH] e2scrub: reorder exit status check after calling lvremove

On Fri, Jul 04, 2025 at 10:38:21PM -0500, Samuel Smith wrote:
> Checking for snapshot device existence resets the status code in $?.
> Reording the conditions will allow the retry loop to work properly.
> 
> Signed-off-by: Samuel Smith <satlug@...153.net>

Yep, that was a mistake.  Sorry about that. :(
Reviewed-by: "Darrick J. Wong" <djwong@...nel.org>

--D

> ---
>  scrub/e2scrub.in | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/scrub/e2scrub.in b/scrub/e2scrub.in
> index 043bc12b..6f9b5ce2 100644
> --- a/scrub/e2scrub.in
> +++ b/scrub/e2scrub.in
> @@ -182,7 +182,7 @@ snap_dev="/dev/${LVM2_VG_NAME}/${snap}"
>  teardown() {
>  	# Remove and wait for removal to succeed.
>  	${DBG} lvremove -f "${LVM2_VG_NAME}/${snap}"
> -	while [ -e "${snap_dev}" ] && [ "$?" -eq "5" ]; do
> +	while [ "$?" -eq "5" ] && [ -e "${snap_dev}" ]; do
>  		sleep 0.5
>  		${DBG} lvremove -f "${LVM2_VG_NAME}/${snap}"
>  	done
> @@ -210,7 +210,7 @@ setup() {
>  	# Try to remove snapshot for 30s, bail out if we can't remove it.
>  	lvremove_deadline="$(( $(date "+%s") + 30))"
>  	${DBG} lvremove -f "${LVM2_VG_NAME}/${snap}" 2>/dev/null
> -	while [ -e "${snap_dev}" ] && [ "$?" -eq "5" ] &&
> +	while [ "$?" -eq "5" ] && [ -e "${snap_dev}" ] &&
>  	      [ "$(date "+%s")" -lt "${lvremove_deadline}" ]; do
>  		sleep 0.5
>  		${DBG} lvremove -f "${LVM2_VG_NAME}/${snap}"
> -- 
> 2.39.5
> 
>