xfs
[Top] [All Lists]

Re: [PATCH] Make inode64 a remountable option

To: Carlos Maiolino <cmaiolino@xxxxxxxxxx>
Subject: Re: [PATCH] Make inode64 a remountable option
From: Brian Foster <bfoster@xxxxxxxxxx>
Date: Thu, 16 Aug 2012 16:23:21 -0400
Cc: xfs@xxxxxxxxxxx
In-reply-to: <1345142110-6412-1-git-send-email-cmaiolino@xxxxxxxxxx>
References: <1345142110-6412-1-git-send-email-cmaiolino@xxxxxxxxxx>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120717 Thunderbird/14.0
On 08/16/2012 02:35 PM, Carlos Maiolino wrote:
> Actually, there is no reason about why a user must umount and mount a XFS
> filesystem to enable 'inode64' option. So, this patch makes this a remountable
> option.
> 
> Signed-off-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>

I just gave it a whirl. It works and the code looks sane to me, so:

Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>

I do have a question though... do we care about the remount from inode64
to non-inode64 case?

Brian

> ---
>  fs/xfs/xfs_super.c | 18 +++++++++++++++++-
>  1 file changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
> index bdaf4cb..4dad567 100644
> --- a/fs/xfs/xfs_super.c
> +++ b/fs/xfs/xfs_super.c
> @@ -120,12 +120,13 @@ mempool_t *xfs_ioend_pool;
>   * in the future, too.
>   */
>  enum {
> -     Opt_barrier, Opt_nobarrier, Opt_err
> +     Opt_barrier, Opt_nobarrier, Opt_inode64, Opt_err
>  };
>  
>  static const match_table_t tokens = {
>       {Opt_barrier, "barrier"},
>       {Opt_nobarrier, "nobarrier"},
> +     {Opt_inode64, "inode64"},
>       {Opt_err, NULL}
>  };
>  
> @@ -1038,11 +1039,15 @@ xfs_fs_remount(
>  {
>       struct xfs_mount        *mp = XFS_M(sb);
>       substring_t             args[MAX_OPT_ARGS];
> +     xfs_sb_t                *sbp = &(mp->m_sb);
> +     xfs_perag_t             *pag;
>       char                    *p;
>       int                     error;
>  
>       while ((p = strsep(&options, ",")) != NULL) {
>               int token;
> +             int agcount = sbp->sb_agcount;
> +             int index = 0;
>  
>               if (!*p)
>                       continue;
> @@ -1055,6 +1060,17 @@ xfs_fs_remount(
>               case Opt_nobarrier:
>                       mp->m_flags &= ~XFS_MOUNT_BARRIER;
>                       break;
> +             case Opt_inode64:
> +
> +                     for (index = 0; index < agcount; index++) {
> +                             pag = xfs_perag_get(mp, index);
> +                             pag->pagi_inodeok = 1;
> +                             xfs_perag_put(pag);
> +                     }
> +                     mp->m_flags &= ~XFS_MOUNT_32BITINODES;
> +                     mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
> +                     mp->m_maxagi = index;
> +                     break;
>               default:
>                       /*
>                        * Logically we would return an error here to prevent
> 

<Prev in Thread] Current Thread [Next in Thread>