Re: [PATCH] nfs: Discard ACL cache on mode update

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On Wed, 2010-12-01 at 16:12 +0530, Aneesh Kumar K.V wrote:
> An update of mode bits can result in ACL value being changed. We need
> to mark the acl cache invalid when we update mode. Similarly we need
> to update file attribute when we change ACL value
> 
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
> ---
>  fs/nfs/nfs4proc.c |    9 +++++++++
>  1 files changed, 9 insertions(+), 0 deletions(-)
> 
> diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
> index 821d4c7..89fb751 100644
> --- a/fs/nfs/nfs4proc.c
> +++ b/fs/nfs/nfs4proc.c
> @@ -3356,6 +3356,8 @@ ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
>  	ret = nfs_revalidate_inode(server, inode);
>  	if (ret < 0)
>  		return ret;
> +	if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
> +		nfs_zap_acl_cache(inode);
>  	ret = nfs4_read_cached_acl(inode, buf, buflen);
>  	if (ret != -ENOENT)
>  		return ret;
> @@ -3384,6 +3386,13 @@ static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t bufl
>  	nfs_inode_return_delegation(inode);
>  	buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
>  	ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
> +	/*
> +	 * Acl update can result in inode attribute update.
> +	 * so mark the attribute cache invalid.
> +	 */
> +	spin_lock(&inode->i_lock);
> +	NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
> +	spin_unlock(&inode->i_lock);
>  	nfs_access_zap_cache(inode);
>  	nfs_zap_acl_cache(inode);
>  	return ret;

Thanks! Applied...

-- 
Trond Myklebust
Linux NFS client maintainer

NetApp
Trond.Myklebust@xxxxxxxxxx
www.netapp.com

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