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>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
index c4db9424b63b..1f95bd612053 100644
--- a/include/linux/sunrpc/auth.h
+++ b/include/linux/sunrpc/auth.h
@@ -46,6 +46,7 @@ enum {
 
 /* Work around the lack of a VFS credential */
 struct auth_cred {
+        const struct cred *cred;
         kuid_t  uid;
         kgid_t  gid;
         struct group_info *group_info;
@@ -68,6 +69,7 @@ struct rpc_cred {
         unsigned long           cr_expire;      /* when to gc */
         unsigned long           cr_flags;       /* various flags */
         refcount_t              cr_count;       /* ref count */
+        const struct cred       *cr_cred;
 
         kuid_t                  cr_uid;