From patchwork Mon Aug 19 18:17:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Snitzer X-Patchwork-Id: 13768777 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 322D8189BAF; Mon, 19 Aug 2024 18:18:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724091483; cv=none; b=R5dxMMDKVRmT/enlCyiOe8JybckBWL9wqq35CSCa9eEOpkga1aTq8c1Op9p3I+i0WTKeg9KkpMfe8IO4GGx6Okfg4A/g+xoeuBjbLkamXFjrZyvzRNC6+1Gz4bP1qEGZsOwQ9UMPBHzjaxrnqszTRd0Q09wzZrCNAX3c5/aH4+0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724091483; c=relaxed/simple; bh=eKSyo4M/PwL7v/TFiclRIphm4rgipy9E/7hryKERvTk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sGk/zJUu5TyPKp1vH91LQnlOUjLdCJkaGU/X1EJRvgVuuvXO0X51U6WgYnPj0jR6qYoE7Z8pirbFIR+PIdFePJ9XcjnuB6UKjjyh1ezuD5dGSV/0IgKHaqYk0jTDKIEQc0CkfVDbpUpA1rIocrC1jlFSFnmWB+4pN1aWKIlT9Bs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=grB86qAr; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="grB86qAr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C2EA4C4AF0C; Mon, 19 Aug 2024 18:18:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724091483; bh=eKSyo4M/PwL7v/TFiclRIphm4rgipy9E/7hryKERvTk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=grB86qArsvXye1TvUsFsxOSJerPr4NqyGMXSeXt1hcd7aAjxVK8KLI+RFWSi2Fkxj h/JEz1V6uj43CmhHx0kQyaCvQ7v161RvOwUAgOxpjnrvp+I0EogcNt6LDd/rbEZOJn 0nScu9dKiF7IVhg2V1tFQjQ/wVW73QImgZp5E7Mw6wyZ2xsstVf/vA3qvg6BaejR8R pmAE7oQzjRptd1GRD+K/BOSWKasK3JGZ1z9MiVOmvSbp8073kkE5wsvf/A+GbN9hfD VHyBMsWrlW/8KmEpK6bpmd9GC0ZzIwL6iCH3wBNelEl/lPV1B9YrW6vtzMHU3ei7Cj nLup4ml8sEYZQ== From: Mike Snitzer To: linux-nfs@vger.kernel.org Cc: Jeff Layton , Chuck Lever , Anna Schumaker , Trond Myklebust , NeilBrown , linux-fsdevel@vger.kernel.org Subject: [PATCH v12 08/24] SUNRPC: add rpcauth_map_clnt_to_svc_cred_local Date: Mon, 19 Aug 2024 14:17:13 -0400 Message-ID: <20240819181750.70570-9-snitzer@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240819181750.70570-1-snitzer@kernel.org> References: <20240819181750.70570-1-snitzer@kernel.org> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Weston Andros Adamson Add new funtion rpcauth_map_clnt_to_svc_cred_local which maps a generic cred to a svc_cred suitable for use in nfsd. This is needed by the localio code to map nfs client creds to nfs server credentials. Following from net/sunrpc/auth_unix.c:unx_marshal() it is clear that ->fsuid and ->fsgid must be used (rather than ->uid and ->gid). In addition, these uid and gid must be translated with from_kuid_munged() so local client uses correct uid and gid when acting as local server. Suggested-by: NeilBrown # to approximate unx_marshal() Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust Co-developed-by: Mike Snitzer Signed-off-by: Mike Snitzer --- include/linux/sunrpc/auth.h | 4 ++++ net/sunrpc/auth.c | 22 ++++++++++++++++++++++ 2 files changed, 26 insertions(+) diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h index 61e58327b1aa..4cfb68f511db 100644 --- a/include/linux/sunrpc/auth.h +++ b/include/linux/sunrpc/auth.h @@ -11,6 +11,7 @@ #define _LINUX_SUNRPC_AUTH_H #include +#include #include #include @@ -184,6 +185,9 @@ int rpcauth_uptodatecred(struct rpc_task *); int rpcauth_init_credcache(struct rpc_auth *); void rpcauth_destroy_credcache(struct rpc_auth *); void rpcauth_clear_credcache(struct rpc_cred_cache *); +void rpcauth_map_clnt_to_svc_cred_local(struct rpc_clnt *clnt, + const struct cred *, + struct svc_cred *); char * rpcauth_stringify_acceptor(struct rpc_cred *); static inline diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c index 04534ea537c8..3b6d91b36589 100644 --- a/net/sunrpc/auth.c +++ b/net/sunrpc/auth.c @@ -17,6 +17,7 @@ #include #include #include +#include #include @@ -308,6 +309,27 @@ rpcauth_init_credcache(struct rpc_auth *auth) } EXPORT_SYMBOL_GPL(rpcauth_init_credcache); +void +rpcauth_map_clnt_to_svc_cred_local(struct rpc_clnt *clnt, + const struct cred *cred, + struct svc_cred *svc) +{ + struct user_namespace *userns = clnt->cl_cred ? + clnt->cl_cred->user_ns : &init_user_ns; + + memset(svc, 0, sizeof(struct svc_cred)); + + svc->cr_uid = KUIDT_INIT(from_kuid_munged(userns, cred->fsuid)); + svc->cr_gid = KGIDT_INIT(from_kgid_munged(userns, cred->fsgid)); + svc->cr_flavor = clnt->cl_auth->au_flavor; + if (cred->group_info) + svc->cr_group_info = get_group_info(cred->group_info); + /* These aren't relevant for local (network is bypassed) */ + svc->cr_principal = NULL; + svc->cr_gss_mech = NULL; +} +EXPORT_SYMBOL_GPL(rpcauth_map_clnt_to_svc_cred_local); + char * rpcauth_stringify_acceptor(struct rpc_cred *cred) {