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nfs4.1: Add state protection handler
Add nfs4_state_protect - the function responsible for switching to the machine credential and the correct rpc client when SP4_MACH_CRED is in use. Signed-off-by: Weston Andros Adamson <dros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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2031cd1af1
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1 changed files with 35 additions and 0 deletions
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@ -268,6 +268,35 @@ is_ds_client(struct nfs_client *clp)
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{
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return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS;
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}
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/*
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* Function responsible for determining if an rpc_message should use the
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* machine cred under SP4_MACH_CRED and if so switching the credential and
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* authflavor (using the nfs_client's rpc_clnt which will be krb5i/p).
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* Should be called before rpc_call_sync/rpc_call_async.
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*/
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static inline void
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nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode,
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struct rpc_clnt **clntp, struct rpc_message *msg)
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{
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struct rpc_cred *newcred = NULL;
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rpc_authflavor_t flavor;
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if (test_bit(sp4_mode, &clp->cl_sp4_flags)) {
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spin_lock(&clp->cl_lock);
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if (clp->cl_machine_cred != NULL)
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newcred = get_rpccred(clp->cl_machine_cred);
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spin_unlock(&clp->cl_lock);
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if (msg->rpc_cred)
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put_rpccred(msg->rpc_cred);
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msg->rpc_cred = newcred;
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flavor = clp->cl_rpcclient->cl_auth->au_flavor;
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WARN_ON(flavor != RPC_AUTH_GSS_KRB5I &&
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flavor != RPC_AUTH_GSS_KRB5P);
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*clntp = clp->cl_rpcclient;
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}
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}
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#else /* CONFIG_NFS_v4_1 */
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static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
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{
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@ -285,6 +314,12 @@ is_ds_client(struct nfs_client *clp)
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{
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return false;
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}
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static inline void
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nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_flags,
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struct rpc_clnt **clntp, struct rpc_message *msg)
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{
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}
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#endif /* CONFIG_NFS_V4_1 */
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extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];
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