Re: [PATCH 03/14] SUNRPC: call svc_process() from svc_recv().

[Jeff Layton <jlayton@kernel.org>]

On Tue, 2023-07-18 at 16:38 +1000, NeilBrown wrote:
> All callers of svc_recv() go on to call svc_process() on success.
> Simplify callers by having svc_recv() do that for them.
> 
> This loses one call to validate_process_creds() in nfsd.  That was
> debugging code added 14 years ago.  I don't think we need to keep it.
> 
> Signed-off-by: NeilBrown <neilb@suse.de>
> ---
>  fs/lockd/svc.c        |    5 -----
>  fs/nfs/callback.c     |    1 -
>  fs/nfsd/nfssvc.c      |    2 --
>  net/sunrpc/svc_xprt.c |    3 ++-
>  4 files changed, 2 insertions(+), 9 deletions(-)
> 
> diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
> index 614faa5f69cd..91ef139a7757 100644
> --- a/fs/lockd/svc.c
> +++ b/fs/lockd/svc.c
> @@ -132,7 +132,6 @@ lockd(void *vrqstp)
>  	 */
>  	while (!kthread_should_stop()) {
>  		long timeout = MAX_SCHEDULE_TIMEOUT;
> -		RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
>  
>  		/* update sv_maxconn if it has changed */
>  		rqstp->rq_server->sv_maxconn = nlm_max_connections;
> @@ -146,10 +145,6 @@ lockd(void *vrqstp)
>  		err = svc_recv(rqstp, timeout);
>  		if (err == -EAGAIN || err == -EINTR)
>  			continue;
> -		dprintk("lockd: request from %s\n",
> -				svc_print_addr(rqstp, buf, sizeof(buf)));
> -
> -		svc_process(rqstp);
>  	}
>  	if (nlmsvc_ops)
>  		nlmsvc_invalidate_all();
> diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
> index 46a0a2d6962e..2d94384bd6a9 100644
> --- a/fs/nfs/callback.c
> +++ b/fs/nfs/callback.c
> @@ -86,7 +86,6 @@ nfs4_callback_svc(void *vrqstp)
>  		err = svc_recv(rqstp, MAX_SCHEDULE_TIMEOUT);
>  		if (err == -EAGAIN || err == -EINTR)
>  			continue;
> -		svc_process(rqstp);
>  	}
>  
>  	svc_exit_thread(rqstp);
> diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
> index 439fca195925..3e08cc746870 100644
> --- a/fs/nfsd/nfssvc.c
> +++ b/fs/nfsd/nfssvc.c
> @@ -985,8 +985,6 @@ nfsd(void *vrqstp)
>  		if (err == -EINTR)
>  			break;
>  		validate_process_creds();
> -		svc_process(rqstp);
> -		validate_process_creds();
>  	}
>  
>  	atomic_dec(&nfsdstats.th_cnt);
> diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
> index 93395606a0ba..c808f6d60c99 100644
> --- a/net/sunrpc/svc_xprt.c
> +++ b/net/sunrpc/svc_xprt.c
> @@ -895,7 +895,8 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
>  		serv->sv_stats->netcnt++;
>  	percpu_counter_inc(&rqstp->rq_pool->sp_messages_arrived);
>  	rqstp->rq_stime = ktime_get();
> -	return len;
> +	svc_process(rqstp);
> +	return 0;
>  out_release:
>  	rqstp->rq_res.len = 0;
>  	svc_xprt_release(rqstp);
> 
> 

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