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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>
This commit is contained in:
Weston Andros Adamson 2013-08-13 16:37:33 -04:00 committed by Trond Myklebust
parent 2031cd1af1
commit ab4c236135
1 changed files with 35 additions and 0 deletions
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35
fs/nfs/nfs4_fs.h
View File

@ -268,6 +268,35 @@ is_ds_client(struct nfs_client *clp)
{
return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS;
}
/*
* Function responsible for determining if an rpc_message should use the
* machine cred under SP4_MACH_CRED and if so switching the credential and
* authflavor (using the nfs_client's rpc_clnt which will be krb5i/p).
* Should be called before rpc_call_sync/rpc_call_async.
*/
static inline void
nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode,
struct rpc_clnt **clntp, struct rpc_message *msg)
{
struct rpc_cred *newcred = NULL;
rpc_authflavor_t flavor;
if (test_bit(sp4_mode, &clp->cl_sp4_flags)) {
spin_lock(&clp->cl_lock);
if (clp->cl_machine_cred != NULL)
newcred = get_rpccred(clp->cl_machine_cred);
spin_unlock(&clp->cl_lock);
if (msg->rpc_cred)
put_rpccred(msg->rpc_cred);
msg->rpc_cred = newcred;
flavor = clp->cl_rpcclient->cl_auth->au_flavor;
WARN_ON(flavor != RPC_AUTH_GSS_KRB5I &&
flavor != RPC_AUTH_GSS_KRB5P);
*clntp = clp->cl_rpcclient;
}
}
#else /* CONFIG_NFS_v4_1 */
static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
{
@ -285,6 +314,12 @@ is_ds_client(struct nfs_client *clp)
{
return false;
}
static inline void
nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_flags,
struct rpc_clnt **clntp, struct rpc_message *msg)
{
}
#endif /* CONFIG_NFS_V4_1 */
extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];