Re: [PATCH 4/7] xfs_db: don't allow label/uuid setting if the needsrepair flag is set

[Allison Henderson <allison.henderson@oracle.com>]

On 2/22/21 8:00 PM, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@kernel.org>
> 
> The NEEDSREPAIR flag can be set on filesystems where we /know/ that
> there's something wrong with the metadata and want to force the sysadmin
> to run xfs_repair before the next mount.  The goal here is to prevent
> non-repair changes to a filesystem when we are confident of its
> instability.  Normally we wouldn't bother with such safety checks for
> the debugger, but the label and uuid functions can be called from
> xfs_admin, so we should prevent these administrative tasks until the
> filesystem can be repaired.
> 
> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
> Reviewed-by: Brian Foster <bfoster@redhat.com>
ok, makes sense
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>

> ---
>   db/sb.c |   11 +++++++++++
>   1 file changed, 11 insertions(+)
> 
> 
> diff --git a/db/sb.c b/db/sb.c
> index d7111e92..cec7dce9 100644
> --- a/db/sb.c
> +++ b/db/sb.c
> @@ -379,6 +379,11 @@ uuid_f(
>   				progname);
>   			return 0;
>   		}
> +		if (xfs_sb_version_needsrepair(&mp->m_sb)) {
> +			dbprintf(_("%s: filesystem needs xfs_repair\n"),
> +				progname);
> +			return 0;
> +		}
>   
>   		if (!strcasecmp(argv[1], "generate")) {
>   			platform_uuid_generate(&uu);
> @@ -543,6 +548,12 @@ label_f(
>   			return 0;
>   		}
>   
> +		if (xfs_sb_version_needsrepair(&mp->m_sb)) {
> +			dbprintf(_("%s: filesystem needs xfs_repair\n"),
> +				progname);
> +			return 0;
> +		}
> +
>   		dbprintf(_("writing all SBs\n"));
>   		for (ag = 0; ag < mp->m_sb.sb_agcount; ag++)
>   			if ((p = do_label(ag, argv[1])) == NULL) {
>