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From: Mike Snitzer <snitzer@kernel.org>
To: linux-nfs@vger.kernel.org
Cc: Jeff Layton <jlayton@kernel.org>,
	Chuck Lever <chuck.lever@oracle.com>,
	Trond Myklebust <trondmy@hammerspace.com>,
	snitzer@hammerspace.com
Subject: [for-6.11 PATCH 06/29] sunrpc: add rpcauth_map_to_svc_cred
Date: Fri,  7 Jun 2024 10:26:23 -0400
Message-ID: <20240607142646.20924-7-snitzer@kernel.org>
In-Reply-To: <20240607142646.20924-1-snitzer@kernel.org>
References: <20240607142646.20924-1-snitzer@kernel.org>
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From: Weston Andros Adamson <dros@primarydata.com>

Add new funtion rpcauth_map_to_svc_cred which maps a generic rpc_cred to an
svc_cred suitable for use in nfsd.

This is needed by the localio code to map nfs client creds to nfs server
credentials.

Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Lance Shelton <lance.shelton@hammerspace.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
---
 include/linux/sunrpc/auth.h |  4 ++++
 net/sunrpc/auth.c           | 16 ++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
index 61e58327b1aa..5ebf031361a1 100644
--- a/include/linux/sunrpc/auth.h
+++ b/include/linux/sunrpc/auth.h
@@ -11,6 +11,7 @@
 #define _LINUX_SUNRPC_AUTH_H
 
 #include <linux/sunrpc/sched.h>
+#include <linux/sunrpc/svcauth.h>
 #include <linux/sunrpc/msg_prot.h>
 #include <linux/sunrpc/xdr.h>
 
@@ -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 *);
+bool			rpcauth_map_to_svc_cred(struct rpc_auth *,
+						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..55a03a3bcac2 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -308,6 +308,22 @@ rpcauth_init_credcache(struct rpc_auth *auth)
 }
 EXPORT_SYMBOL_GPL(rpcauth_init_credcache);
 
+bool
+rpcauth_map_to_svc_cred(struct rpc_auth *auth, const struct cred *cred,
+			struct svc_cred *svc)
+{
+	svc->cr_uid = cred->uid;
+	svc->cr_gid = cred->gid;
+	svc->cr_flavor = auth->au_flavor;
+	svc->cr_principal = NULL;
+	svc->cr_gss_mech = NULL;
+	if (cred->group_info)
+		svc->cr_group_info = get_group_info(cred->group_info);
+
+	return true;
+}
+EXPORT_SYMBOL_GPL(rpcauth_map_to_svc_cred);
+
 char *
 rpcauth_stringify_acceptor(struct rpc_cred *cred)
 {
-- 
2.44.0