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Message-ID: <191757a0ccb52fefa17b690a44299442fcb4e052.camel@kernel.org>
Subject: Re: [for-next][PATCH 06/13] NFSD: Fix nfsd_clid_class use of
 __string_len() macro
From: Jeff Layton <jlayton@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>, linux-kernel@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>, Mark Rutland
 <mark.rutland@arm.com>,  Mathieu Desnoyers
 <mathieu.desnoyers@efficios.com>, Andrew Morton
 <akpm@linux-foundation.org>, Neil Brown <neilb@suse.de>, Olga Kornievskaia
 <kolga@netapp.com>, Dai Ngo <Dai.Ngo@oracle.com>, Tom Talpey
 <tom@talpey.com>, Chuck Lever <chuck.lever@oracle.com>
Date: Fri, 23 Feb 2024 09:36:14 -0500
In-Reply-To: <20240223141902.394601874@goodmis.org>
References: <20240223141838.985298316@goodmis.org>
	 <20240223141902.394601874@goodmis.org>
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On Fri, 2024-02-23 at 09:18 -0500, Steven Rostedt wrote:
> From: "Steven Rostedt (Google)" <rostedt@goodmis.org>
>=20
> I'm working on restructuring the __string* macros so that it doesn't need
> to recalculate the string twice. That is, it will save it off when
> processing __string() and the __assign_str() will not need to do the work
> again as it currently does.
>=20
> Currently __string_len(item, src, len) doesn't actually use "src", but my
> changes will require src to be correct as that is where the __assign_str(=
)
> will get its value from.
>=20
> The event class nfsd_clid_class has:
>=20
>   __string_len(name, name, clp->cl_name.len)
>=20
> But the second "name" does not exist and causes my changes to fail to
> build. That second parameter should be: clp->cl_name.data.
>=20
> Link: https://lore.kernel.org/linux-trace-kernel/20240222122828.3d8d213c@=
gandalf.local.home
>=20
> Cc: Jeff Layton <jlayton@kernel.org>
> Cc: Neil Brown <neilb@suse.de>
> Cc: Olga Kornievskaia <kolga@netapp.com>
> Cc: Dai Ngo <Dai.Ngo@oracle.com>
> Cc: Tom Talpey <tom@talpey.com>
> Fixes: d27b74a8675ca ("NFSD: Use new __string_len C macros for nfsd_clid_=
class")
> Acked-by: Chuck Lever <chuck.lever@oracle.com>
> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
> ---
>  fs/nfsd/trace.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>=20
> diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
> index d1e8cf079b0f..2cd57033791f 100644
> --- a/fs/nfsd/trace.h
> +++ b/fs/nfsd/trace.h
> @@ -843,7 +843,7 @@ DECLARE_EVENT_CLASS(nfsd_clid_class,
>  		__array(unsigned char, addr, sizeof(struct sockaddr_in6))
>  		__field(unsigned long, flavor)
>  		__array(unsigned char, verifier, NFS4_VERIFIER_SIZE)
> -		__string_len(name, name, clp->cl_name.len)
> +		__string_len(name, clp->cl_name.data, clp->cl_name.len)
>  	),
>  	TP_fast_assign(
>  		__entry->cl_boot =3D clp->cl_clientid.cl_boot;

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