From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 934EF37C91F for ; Fri, 26 Jun 2026 14:04:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782482679; cv=none; b=XbdL3TLoe0hqknUQxJYr+Lw2fTTKU38I7CdalYRgzuNR82Pmz8Y1C9+O5+4fg3Pt4UBU9A4pYJTWh1xPNtgSI1lhIyzIN1gU6S5Ux61y685ZOPIZDDKMHnjiofo7xTfm7WOW3hpDxAknFqF9V+gmWddO0XjGG9HO/LdTx2zBizA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782482679; c=relaxed/simple; bh=rBe5+MOXSNQJlqraxEXQWmKZ7ltm1dq0sDXAaJuqIho=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=Z6zP2J7yvHNJBCSNK8lDR4/Grp/GAh/xoxxs/N7nKWv/FTr/g8abbtsQFeFv0P/ga6ZmeIpWDxBoZGhqQNcU62CDZfc9N059ut8DhMz0YYngXML2yFGRDhSOzhHvJgaalUYdoDvTVMLl0O9+xGqBkcdjbW+gJA3rZEYUwpZ4euk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=A+0laSgw; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="A+0laSgw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 010AD1F000E9; Fri, 26 Jun 2026 14:04:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782482678; bh=ojzMF7wBfzZb7yAHLtAm9HYt6N4Pa8CTF95LvmmprQo=; h=Subject:From:To:Cc:Date:In-Reply-To:References; b=A+0laSgwC4pAXw5idigF5oR5LA4NcfXnkpgHFipE3gweWygJsLfUFAOv2s7s7+74j a9HPjP/BfcaMzLzw2JCB/JTSSFfnHJslG5z6SkBQafDfVlc3VDvXmq3I6l3zo+vDiz d8VF+g4uw6fQigou81Yw/0xe+HnnbZocQrqqcfNPNGr4fsBBR93CRqfZKuO33uu7g3 bVHN2owg0fYjUgvi6/SNu781C3ZsAEWINLV8r4H/ia5Tpsi+xUEdEaTzTez0ivwDCH +UpKn8loAU8y6eAw/+R/tJaPlRQ1w7p8GRKMvar2hnPDSXUUmkd42BCS3nEvNXtZhm f849VXQU4zWEw== Message-ID: <7290d0262d782c0c3b26b8167975face1ae91053.camel@kernel.org> Subject: Re: [PATCH 1/1] [RFC] sunrpc: inject process namespace into machinename field From: Jeff Layton To: Tigran Mkrtchyan , trondmy@kernel.org, chuck.lever@oracle.com, anna@kernel.org Cc: linux-nfs@vger.kernel.org Date: Fri, 26 Jun 2026 10:04:36 -0400 In-Reply-To: <20260626125216.1467845-2-tigran.mkrtchyan@desy.de> References: <20260626125216.1467845-1-tigran.mkrtchyan@desy.de> <20260626125216.1467845-2-tigran.mkrtchyan@desy.de> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV 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Fri, 2026-06-26 at 14:52 +0200, Tigran Mkrtchyan wrote: > On large shared machines often multiple jobs of a same user run in > parallel. For debugging, it's usually impossible to identify requests > coming from different processes. >=20 > The batch systems like HTCondor or SLURM start every job in it's own > namespace, thus passing namespace info to the server will help by > debugging. >=20 > Signed-off-by: Tigran Mkrtchyan > --- > net/sunrpc/auth_unix.c | 27 +++++++++++++++++++++++++-- > 1 file changed, 25 insertions(+), 2 deletions(-) >=20 > diff --git a/net/sunrpc/auth_unix.c b/net/sunrpc/auth_unix.c > index 6c742a3400c4..b218cfa9871a 100644 > --- a/net/sunrpc/auth_unix.c > +++ b/net/sunrpc/auth_unix.c > @@ -15,6 +15,7 @@ > #include > #include > #include > +#include > =20 > =20 > #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) > @@ -117,6 +118,28 @@ unx_marshal(struct rpc_task *task, struct xdr_stream= *xdr) > struct group_info *gi =3D cred->cr_cred->group_info; > struct user_namespace *userns =3D clnt->cl_cred ? > clnt->cl_cred->user_ns : &init_user_ns; > + char ns_aware_nodename[UNX_MAXNODENAME + 1]; > + int ns_aware_nodename_len; > + > + struct pid_namespace *pid_ns =3D task_active_pid_ns(current); > + > + /* the process runs in a dedicated namespace */ > + if (pid_ns !=3D &init_pid_ns) { FYI, Sashiko has some comments on this that seem valid: https://sashiko.dev/#/patchset/20260626125216.1467845-2-tigran.mkrtchyan@de= sy.de?part=3D1 Fetching the user namespace ID might not be correct in some async ops. > + /* Format as: @ */ > + int prefix_len =3D snprintf(ns_aware_nodename, sizeof(ns_aware_nodenam= e), > + "%u@", pid_ns->ns.inum); > + > + if (prefix_len < sizeof(ns_aware_nodename)) > + strscpy(ns_aware_nodename + prefix_len, clnt->cl_nodename, > + sizeof(ns_aware_nodename) - prefix_len); > + else > + strscpy(ns_aware_nodename, clnt->cl_nodename, sizeof(ns_aware_nodenam= e)); > + > + ns_aware_nodename_len =3D strlen(ns_aware_nodename); > + } else { > + ns_aware_nodename_len =3D clnt->cl_nodelen; > + strscpy(ns_aware_nodename, clnt->cl_nodename, sizeof(ns_aware_nodename= )); > + } > =20 > /* Credential */ > =20 > @@ -126,8 +149,8 @@ unx_marshal(struct rpc_task *task, struct xdr_stream = *xdr) > *p++ =3D rpc_auth_unix; > cred_len =3D p++; > *p++ =3D xdr_zero; /* stamp */ > - if (xdr_stream_encode_opaque(xdr, clnt->cl_nodename, > - clnt->cl_nodelen) < 0) > + if (xdr_stream_encode_opaque(xdr, ns_aware_nodename, > + ns_aware_nodename_len) < 0) > goto marshal_failed; > p =3D xdr_reserve_space(xdr, 3 * sizeof(*p)); > if (!p) --=20 Jeff Layton