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[PATCH 7/9] gfs2: update ctime when quota is updated

Jeff Layton posted 9 patches 2 years, 8 months ago
There is a newer version of this series
[PATCH 7/9] gfs2: update ctime when quota is updated
Posted by Jeff Layton 2 years, 8 months ago 
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/gfs2/quota.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 1ed17226d9ed..6d283e071b90 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -869,7 +869,7 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
 		size = loc + sizeof(struct gfs2_quota);
 		if (size > inode->i_size)
 			i_size_write(inode, size);
-		inode->i_mtime = inode->i_atime = current_time(inode);
+		inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
 		mark_inode_dirty(inode);
 		set_bit(QDF_REFRESH, &qd->qd_flags);
 	}
-- 
2.40.1
Re: [PATCH 7/9] gfs2: update ctime when quota is updated
Posted by Andreas Gruenbacher 2 years, 8 months ago 
Jeff,

On Fri, Jun 9, 2023 at 2:50 PM Jeff Layton <jlayton@kernel.org> wrote:
> Signed-off-by: Jeff Layton <jlayton@kernel.org>
> ---
>  fs/gfs2/quota.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
> index 1ed17226d9ed..6d283e071b90 100644
> --- a/fs/gfs2/quota.c
> +++ b/fs/gfs2/quota.c
> @@ -869,7 +869,7 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
>                 size = loc + sizeof(struct gfs2_quota);
>                 if (size > inode->i_size)
>                         i_size_write(inode, size);
> -               inode->i_mtime = inode->i_atime = current_time(inode);
> +               inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);

I don't think we need to worry about the ctime of the quota inode as
that inode is internal to the filesystem only.

>                 mark_inode_dirty(inode);
>                 set_bit(QDF_REFRESH, &qd->qd_flags);
>         }
> --
> 2.40.1
>

Thanks,
Andreas
Re: [PATCH 7/9] gfs2: update ctime when quota is updated
Posted by Jeff Layton 2 years, 8 months ago 
On Fri, 2023-06-09 at 18:44 +0200, Andreas Gruenbacher wrote:
> Jeff,
> 
> On Fri, Jun 9, 2023 at 2:50 PM Jeff Layton <jlayton@kernel.org> wrote:
> > Signed-off-by: Jeff Layton <jlayton@kernel.org>
> > ---
> >  fs/gfs2/quota.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
> > index 1ed17226d9ed..6d283e071b90 100644
> > --- a/fs/gfs2/quota.c
> > +++ b/fs/gfs2/quota.c
> > @@ -869,7 +869,7 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
> >                 size = loc + sizeof(struct gfs2_quota);
> >                 if (size > inode->i_size)
> >                         i_size_write(inode, size);
> > -               inode->i_mtime = inode->i_atime = current_time(inode);
> > +               inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
> 
> I don't think we need to worry about the ctime of the quota inode as
> that inode is internal to the filesystem only.
> 

Thanks Andreas.  I'll plan to drop this patch from the series for now.

Does updating the mtime and atime here serve any purpose, or should
those also be removed? If you plan to keep the a/mtime updates then I'd
still suggest updating the ctime for consistency's sake. It shouldn't
cost anything extra to do so since you're dirtying the inode below
anyway.

Thanks!

> >                 mark_inode_dirty(inode);
> >                 set_bit(QDF_REFRESH, &qd->qd_flags);
> >         }
> > --
> > 2.40.1
> > 
> 
> Thanks,
> Andreas
> 

-- 
Jeff Layton <jlayton@kernel.org>
Re: [PATCH 7/9] gfs2: update ctime when quota is updated
Posted by Andreas Gruenbacher 2 years, 7 months ago 
On Mon, Jun 12, 2023 at 12:36 PM Jeff Layton <jlayton@kernel.org> wrote:
> On Fri, 2023-06-09 at 18:44 +0200, Andreas Gruenbacher wrote:
> > Jeff,
> >
> > On Fri, Jun 9, 2023 at 2:50 PM Jeff Layton <jlayton@kernel.org> wrote:
> > > Signed-off-by: Jeff Layton <jlayton@kernel.org>
> > > ---
> > >  fs/gfs2/quota.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
> > > index 1ed17226d9ed..6d283e071b90 100644
> > > --- a/fs/gfs2/quota.c
> > > +++ b/fs/gfs2/quota.c
> > > @@ -869,7 +869,7 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
> > >                 size = loc + sizeof(struct gfs2_quota);
> > >                 if (size > inode->i_size)
> > >                         i_size_write(inode, size);
> > > -               inode->i_mtime = inode->i_atime = current_time(inode);
> > > +               inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
> >
> > I don't think we need to worry about the ctime of the quota inode as
> > that inode is internal to the filesystem only.
> >
>
> Thanks Andreas.  I'll plan to drop this patch from the series for now.
>
> Does updating the mtime and atime here serve any purpose, or should
> those also be removed? If you plan to keep the a/mtime updates then I'd
> still suggest updating the ctime for consistency's sake. It shouldn't
> cost anything extra to do so since you're dirtying the inode below
> anyway.

Yes, good point actually, we should keep things consistent for simplicity.

Would you add this back in if you do another posting?

Thanks,
Andreas

> Thanks!
>
> > >                 mark_inode_dirty(inode);
> > >                 set_bit(QDF_REFRESH, &qd->qd_flags);
> > >         }
> > > --
> > > 2.40.1
> > >
> >
> > Thanks,
> > Andreas
> >
>
> --
> Jeff Layton <jlayton@kernel.org>
>
Re: [PATCH 7/9] gfs2: update ctime when quota is updated
Posted by Jeff Layton 2 years, 7 months ago 
On Wed, 2023-07-05 at 22:25 +0200, Andreas Gruenbacher wrote:
> On Mon, Jun 12, 2023 at 12:36 PM Jeff Layton <jlayton@kernel.org> wrote:
> > On Fri, 2023-06-09 at 18:44 +0200, Andreas Gruenbacher wrote:
> > > Jeff,
> > > 
> > > On Fri, Jun 9, 2023 at 2:50 PM Jeff Layton <jlayton@kernel.org> wrote:
> > > > Signed-off-by: Jeff Layton <jlayton@kernel.org>
> > > > ---
> > > >  fs/gfs2/quota.c | 2 +-
> > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > 
> > > > diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
> > > > index 1ed17226d9ed..6d283e071b90 100644
> > > > --- a/fs/gfs2/quota.c
> > > > +++ b/fs/gfs2/quota.c
> > > > @@ -869,7 +869,7 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
> > > >                 size = loc + sizeof(struct gfs2_quota);
> > > >                 if (size > inode->i_size)
> > > >                         i_size_write(inode, size);
> > > > -               inode->i_mtime = inode->i_atime = current_time(inode);
> > > > +               inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
> > > 
> > > I don't think we need to worry about the ctime of the quota inode as
> > > that inode is internal to the filesystem only.
> > > 
> > 
> > Thanks Andreas.  I'll plan to drop this patch from the series for now.
> > 
> > Does updating the mtime and atime here serve any purpose, or should
> > those also be removed? If you plan to keep the a/mtime updates then I'd
> > still suggest updating the ctime for consistency's sake. It shouldn't
> > cost anything extra to do so since you're dirtying the inode below
> > anyway.
> 
> Yes, good point actually, we should keep things consistent for simplicity.
> 
> Would you add this back in if you do another posting?
> 

I just re-posted the other patches in this as part of the ctime accessor
conversion. If I post again though, I can resurrect the gfs2 patch. If
not, we can do a follow-on fix later.

Since we're discussing it, it may be more correct to remove the atime
update there. gfs2_adjust_quota sounds like a "modify" operation, not a
"read", so I don't see a reason to update the atime.

In general, the only time you only want to set the atime, ctime and
mtime in lockstep is when the inode is brand new.
-- 
Jeff Layton <jlayton@kernel.org>
Re: [PATCH 7/9] gfs2: update ctime when quota is updated
Posted by Andreas Grünbacher 2 years, 7 months ago 
Am Mi., 5. Juli 2023 um 23:51 Uhr schrieb Jeff Layton <jlayton@kernel.org>:
>
> On Wed, 2023-07-05 at 22:25 +0200, Andreas Gruenbacher wrote:
> > On Mon, Jun 12, 2023 at 12:36 PM Jeff Layton <jlayton@kernel.org> wrote:
> > > On Fri, 2023-06-09 at 18:44 +0200, Andreas Gruenbacher wrote:
> > > > Jeff,
> > > >
> > > > On Fri, Jun 9, 2023 at 2:50 PM Jeff Layton <jlayton@kernel.org> wrote:
> > > > > Signed-off-by: Jeff Layton <jlayton@kernel.org>
> > > > > ---
> > > > >  fs/gfs2/quota.c | 2 +-
> > > > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > > >
> > > > > diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
> > > > > index 1ed17226d9ed..6d283e071b90 100644
> > > > > --- a/fs/gfs2/quota.c
> > > > > +++ b/fs/gfs2/quota.c
> > > > > @@ -869,7 +869,7 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
> > > > >                 size = loc + sizeof(struct gfs2_quota);
> > > > >                 if (size > inode->i_size)
> > > > >                         i_size_write(inode, size);
> > > > > -               inode->i_mtime = inode->i_atime = current_time(inode);
> > > > > +               inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
> > > >
> > > > I don't think we need to worry about the ctime of the quota inode as
> > > > that inode is internal to the filesystem only.
> > > >
> > >
> > > Thanks Andreas.  I'll plan to drop this patch from the series for now.
> > >
> > > Does updating the mtime and atime here serve any purpose, or should
> > > those also be removed? If you plan to keep the a/mtime updates then I'd
> > > still suggest updating the ctime for consistency's sake. It shouldn't
> > > cost anything extra to do so since you're dirtying the inode below
> > > anyway.
> >
> > Yes, good point actually, we should keep things consistent for simplicity.
> >
> > Would you add this back in if you do another posting?
> >
>
> I just re-posted the other patches in this as part of the ctime accessor
> conversion. If I post again though, I can resurrect the gfs2 patch. If
> not, we can do a follow-on fix later.

Sure, not a big deal.

> Since we're discussing it, it may be more correct to remove the atime
> update there. gfs2_adjust_quota sounds like a "modify" operation, not a
> "read", so I don't see a reason to update the atime.
>
> In general, the only time you only want to set the atime, ctime and
> mtime in lockstep is when the inode is brand new.

Yes, that makes sense, too.

Thanks,
Andreas

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