Implement client-side load reporting for grpclb.
diff --git a/src/core/ext/filters/client_channel/lb_policy.h b/src/core/ext/filters/client_channel/lb_policy.h
index 2542766..fefcb49 100644
--- a/src/core/ext/filters/client_channel/lb_policy.h
+++ b/src/core/ext/filters/client_channel/lb_policy.h
@@ -43,9 +43,6 @@
typedef struct grpc_lb_policy grpc_lb_policy;
typedef struct grpc_lb_policy_vtable grpc_lb_policy_vtable;
-typedef void (*grpc_lb_completion)(void *cb_arg, grpc_subchannel *subchannel,
- grpc_status_code status, const char *errmsg);
-
struct grpc_lb_policy {
const grpc_lb_policy_vtable *vtable;
gpr_atm ref_pair;
@@ -76,7 +73,8 @@
/** \see grpc_lb_policy_pick */
int (*pick_locked)(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
const grpc_lb_policy_pick_args *pick_args,
- grpc_connected_subchannel **target, void **user_data,
+ grpc_connected_subchannel **target,
+ grpc_call_context_element *context, void **user_data,
grpc_closure *on_complete);
/** \see grpc_lb_policy_cancel_pick */
@@ -156,6 +154,8 @@
\a target will be set to the selected subchannel, or NULL on failure.
Upon success, \a user_data will be set to whatever opaque information
may need to be propagated from the LB policy, or NULL if not needed.
+ \a context will be populated with context to pass to the subchannel
+ call, if needed.
If the pick succeeds and a result is known immediately, a non-zero
value will be returned. Otherwise, \a on_complete will be invoked
@@ -167,6 +167,7 @@
int grpc_lb_policy_pick_locked(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
const grpc_lb_policy_pick_args *pick_args,
grpc_connected_subchannel **target,
+ grpc_call_context_element *context,
void **user_data, grpc_closure *on_complete);
/** Perform a connected subchannel ping (see \a grpc_connected_subchannel_ping)