linux-kernel - Re: [PATCH 03/11] nfs: split nfs_update

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Message-ID: <58783a0861b6fe67ef93684e61363bc245d7053a.camel@kernel.org>
Date: Tue, 06 Jan 2026 06:40:18 -0500
From: Jeff Layton <jlayton@...nel.org>
To: Christoph Hellwig <hch@....de>, Christian Brauner <brauner@...nel.org>
Cc: Al Viro <viro@...iv.linux.org.uk>, David Sterba <dsterba@...e.com>, Jan
 Kara <jack@...e.cz>, Mike Marshall <hubcap@...ibond.com>, Martin
 Brandenburg	 <martin@...ibond.com>, Carlos Maiolino <cem@...nel.org>,
 Stefan Roesch	 <shr@...com>, OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
 Trond Myklebust	 <trondmy@...nel.org>, Anna Schumaker <anna@...nel.org>, 
	linux-kernel@...r.kernel.org, linux-btrfs@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, gfs2@...ts.linux.dev,
 io-uring@...r.kernel.org, 	devel@...ts.orangefs.org,
 linux-unionfs@...r.kernel.org, 	linux-mtd@...ts.infradead.org,
 linux-xfs@...r.kernel.org, 	linux-nfs@...r.kernel.org
Subject: Re: [PATCH 03/11] nfs: split nfs_update_timestamps

On Tue, 2026-01-06 at 08:49 +0100, Christoph Hellwig wrote:
> The VFS paths update either the atime or ctime and mtime but never mix
> between atime and the others.  Split nfs_update_timestamps to match this
> to prepare for cleaning up the VFS interfaces.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  fs/nfs/inode.c | 31 +++++++++++++++----------------
>  1 file changed, 15 insertions(+), 16 deletions(-)
> 
> diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
> index 84049f3cd340..3be8ba7b98c5 100644
> --- a/fs/nfs/inode.c
> +++ b/fs/nfs/inode.c
> @@ -669,35 +669,31 @@ static void nfs_set_timestamps_to_ts(struct inode *inode, struct iattr *attr)
>  	NFS_I(inode)->cache_validity &= ~cache_flags;
>  }
>  
> -static void nfs_update_timestamps(struct inode *inode, unsigned int ia_valid)
> +static void nfs_update_atime(struct inode *inode)
>  {
> -	enum file_time_flags time_flags = 0;
> -	unsigned int cache_flags = 0;
> +	inode_update_timestamps(inode, S_ATIME);
> +	NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ATIME;
> +}
>  
> -	if (ia_valid & ATTR_MTIME) {
> -		time_flags |= S_MTIME | S_CTIME;
> -		cache_flags |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME;
> -	}
> -	if (ia_valid & ATTR_ATIME) {
> -		time_flags |= S_ATIME;
> -		cache_flags |= NFS_INO_INVALID_ATIME;
> -	}
> -	inode_update_timestamps(inode, time_flags);
> -	NFS_I(inode)->cache_validity &= ~cache_flags;
> +static void nfs_update_mtime(struct inode *inode)
> +{
> +	inode_update_timestamps(inode, S_MTIME | S_CTIME);
> +	NFS_I(inode)->cache_validity &=
> +		~(NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME);
>  }
>  
>  void nfs_update_delegated_atime(struct inode *inode)
>  {
>  	spin_lock(&inode->i_lock);
>  	if (nfs_have_delegated_atime(inode))
> -		nfs_update_timestamps(inode, ATTR_ATIME);
> +		nfs_update_atime(inode);
>  	spin_unlock(&inode->i_lock);
>  }
>  
>  void nfs_update_delegated_mtime_locked(struct inode *inode)
>  {
>  	if (nfs_have_delegated_mtime(inode))
> -		nfs_update_timestamps(inode, ATTR_MTIME);
> +		nfs_update_mtime(inode);
>  }
>  
>  void nfs_update_delegated_mtime(struct inode *inode)
> @@ -747,7 +743,10 @@ nfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
>  						ATTR_ATIME|ATTR_ATIME_SET);
>  			}
>  		} else {
> -			nfs_update_timestamps(inode, attr->ia_valid);
> +			if (attr->ia_valid & ATTR_MTIME)
> +				nfs_update_mtime(inode);
> +			if (attr->ia_valid & ATTR_ATIME)
> +				nfs_update_atime(inode);
>  			attr->ia_valid &= ~(ATTR_MTIME|ATTR_ATIME);
>  		}
>  		spin_unlock(&inode->i_lock);

Reviewed-by: Jeff Layton <jlayton@...nel.org>