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authorNeilBrown <neilb@suse.com>2018-12-03 11:30:30 +1100
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2018-12-19 13:52:44 -0500
commit97f68c6b02e0225b38d327103c59cfe2ab5ecda7 (patch)
tree87d434407fef925b2d3fefad5dd759d33b9eb31a /fs/nfsd
parentf06bc03339ad4c1baa964a5f0606247ac1c3c50b (diff)
downloadlinux-97f68c6b02e0225b38d327103c59cfe2ab5ecda7.tar.bz2
SUNRPC: add 'struct cred *' to auth_cred and rpc_cred
The SUNRPC credential framework was put together before Linux has 'struct cred'. Now that we have it, it makes sense to use it. This first step just includes a suitable 'struct cred *' pointer in every 'struct auth_cred' and almost every 'struct rpc_cred'. The rpc_cred used for auth_null has a NULL 'struct cred *' as nothing else really makes sense. For rpc_cred, the pointer is reference counted. For auth_cred it isn't. struct auth_cred are either allocated on the stack, in which case the thread owns a reference to the auth, or are part of 'struct generic_cred' in which case gc_base owns the reference, and "acred" shares it. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4callback.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 25987bcdf96f..7c7e3510599d 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -858,10 +858,21 @@ static struct rpc_cred *get_backchannel_cred(struct nfs4_client *clp, struct rpc
} else {
struct rpc_auth *auth = client->cl_auth;
struct auth_cred acred = {};
+ struct cred *kcred;
+ struct rpc_cred *ret;
+
+ kcred = prepare_kernel_cred(NULL);
+ if (!kcred)
+ return NULL;
acred.uid = ses->se_cb_sec.uid;
acred.gid = ses->se_cb_sec.gid;
- return auth->au_ops->lookup_cred(client->cl_auth, &acred, 0);
+ kcred->uid = acred.uid;
+ kcred->gid = acred.gid;
+ acred.cred = kcred;
+ ret = auth->au_ops->lookup_cred(client->cl_auth, &acred, 0);
+ put_cred(kcred);
+ return ret;
}
}