Re: [PATCH v7 09/14] NFSD: Clean up nfsd4_init_file()

[Jeff Layton <jlayton@kernel.org>]

On Fri, 2022-10-28 at 10:47 -0400, Chuck Lever wrote:
> Name this function more consistently. I'm going to use nfsd4_file_
> and nfsd4_file_hash_ for these helpers.
> 
> Change the @fh parameter to be const pointer for better type safety.
> 
> Finally, move the hash insertion operation to the caller. This is
> typical for most other "init_object" type helpers, and it is where
> most of the other nfs4_file hash table operations are located.
> 
> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
> Reviewed-by: NeilBrown <neilb@suse.de>
> ---
>  fs/nfsd/nfs4state.c |   10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> index 60f1aa2c5442..3132e4844ef8 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -4262,11 +4262,9 @@ static struct nfs4_file *nfsd4_alloc_file(void)
>  }
>  
>  /* OPEN Share state helper functions */
> -static void nfsd4_init_file(struct svc_fh *fh, unsigned int hashval,
> -				struct nfs4_file *fp)
> -{
> -	lockdep_assert_held(&state_lock);
>  
> +static void nfsd4_file_init(const struct svc_fh *fh, struct nfs4_file *fp)
> +{
>  	refcount_set(&fp->fi_ref, 1);
>  	spin_lock_init(&fp->fi_lock);
>  	INIT_LIST_HEAD(&fp->fi_stateids);
> @@ -4284,7 +4282,6 @@ static void nfsd4_init_file(struct svc_fh *fh, unsigned int hashval,
>  	INIT_LIST_HEAD(&fp->fi_lo_states);
>  	atomic_set(&fp->fi_lo_recalls, 0);
>  #endif
> -	hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]);
>  }
>  
>  void
> @@ -4702,7 +4699,8 @@ static struct nfs4_file *insert_file(struct nfs4_file *new, struct svc_fh *fh,
>  			fp->fi_aliased = alias_found = true;
>  	}
>  	if (likely(ret == NULL)) {
> -		nfsd4_init_file(fh, hashval, new);
> +		nfsd4_file_init(fh, new);
> +		hlist_add_head_rcu(&new->fi_hash, &file_hashtbl[hashval]);
>  		new->fi_aliased = alias_found;
>  		ret = new;
>  	}
> 
> 

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