Re: [V9fs-developer] [PATCH 1/5] fs/9p: Fix revalidate to return correct value

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On Mon, 28 Mar 2011 13:49:44 -0700, Venkateswararao Jujjuri <jvrao@xxxxxxxxxxxxxxxxxx> wrote:
> On 03/25/2011 01:50 PM, Venkateswararao Jujjuri wrote:
> > On 03/25/2011 04:30 AM, Aneesh Kumar K.V wrote:
> >> revalidate should return>  0 on success.
> >>
> >> Signed-off-by: Aneesh Kumar K.V<aneesh.kumar@xxxxxxxxxxxxxxxxxx>
> >
> > Reviewed-by: Venkateswararao Jujjuri <jvrao@xxxxxxxxxxxxxxxxxx>
> >
> >> ---
> >>   fs/9p/vfs_dentry.c |    2 +-
> >>   1 files changed, 1 insertions(+), 1 deletions(-)
> >>
> >> diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c
> >> index b6a3b9f..59c5ddc 100644
> >> --- a/fs/9p/vfs_dentry.c
> >> +++ b/fs/9p/vfs_dentry.c
> >> @@ -126,7 +126,7 @@ static int v9fs_lookup_revalidate(struct dentry 
> >> *dentry, struct nameidata *nd)
> >>               retval = v9fs_refresh_inode_dotl(fid, inode);
> >>           else
> >>               retval = v9fs_refresh_inode(fid, inode);
> >> -        if (retval<= 0)
> >> +        if (retval<  0)
> This change is causing tuxera rename test failure with acls enabled.
> 
> /root/pjd-fstest-20080816/tests/rename/10.t  (Wstat: 0 Tests: 188 Failed: 6)
>    Failed tests:  65, 71, 74, 77, 79-80
> The comment in namei says:
> "  If d_revalidate returned 0 attempt to invalidate  the dentry 
> otherwise d_revalidate is asking us
>   to return a fail status." I guess we need to return 0 in the case of 
> rename.
> Need more closer look at this patch.
> 

The failure is due to the VFS issue which I already reported. The
patch for that is here
http://article.gmane.org/gmane.linux.file-systems/51123

Previously we worked around that in 9p. But with the recent VFS changes
the work around applies no more, lookup_create fails on error in
lookup_hash and look_hash -> do_revalidate returns ENOENT.

-aneesh
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