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authorNeilBrown <neilb@suse.com>2018-12-03 11:30:30 +1100
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2018-12-19 13:52:45 -0500
commit1de7eea92946d7b581a8cd26084410913c80e594 (patch)
tree24f83b50f58976dbad4025bae814daebb6029657 /include/linux/sunrpc
parenta68a72e135ef55bce136a0b604413fd6b0f6d3fc (diff)
SUNRPC: add side channel to use non-generic cred for rpc call.
The credential passed in rpc_message.rpc_cred is always a generic credential except in one instance. When gss_destroying_context() calls rpc_call_null(), it passes a specific credential that it needs to destroy. In this case the RPC acts *on* the credential rather than being authorized by it. This special case deserves explicit support and providing that will mean that rpc_message.rpc_cred is *always* generic, allowing some optimizations. So add "tk_op_cred" to rpc_task and "rpc_op_cred" to the setup data. Use this to pass the cred down from rpc_call_null(), and have rpcauth_bindcred() notice it and bind it in place. Credit to kernel test robot <fengguang.wu@intel.com> for finding a bug in earlier version of this patch. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'include/linux/sunrpc')
-rw-r--r--include/linux/sunrpc/sched.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index bd722ebc70b7..4e2b893b83a8 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -71,6 +71,7 @@ struct rpc_task {
struct rpc_clnt * tk_client; /* RPC client */
struct rpc_xprt * tk_xprt; /* Transport */
+ struct rpc_cred * tk_op_cred; /* cred being operated on */
struct rpc_rqst * tk_rqstp; /* RPC request */
@@ -105,6 +106,7 @@ struct rpc_task_setup {
struct rpc_task *task;
struct rpc_clnt *rpc_client;
struct rpc_xprt *rpc_xprt;
+ struct rpc_cred *rpc_op_cred; /* credential being operated on */
const struct rpc_message *rpc_message;
const struct rpc_call_ops *callback_ops;
void *callback_data;