diff options
Diffstat (limited to 'src/core/ext/load_reporting/load_reporting.h')
| -rw-r--r-- | src/core/ext/load_reporting/load_reporting.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/src/core/ext/load_reporting/load_reporting.h b/src/core/ext/load_reporting/load_reporting.h index a0db780c3a..e13097654d 100644 --- a/src/core/ext/load_reporting/load_reporting.h +++ b/src/core/ext/load_reporting/load_reporting.h @@ -37,12 +37,20 @@ #include <grpc/impl/codegen/grpc_types.h> #include "src/core/lib/channel/channel_stack.h" -/** Metadata key for initial metadata coming from clients */ -/* TODO(dgq): change to the final value TBD */ +/** Metadata key for the gRPC LB load balancer token. + * + * The value corresponding to this key is an opaque token that is given to the + * frontend as part of each pick; the frontend sends this token to the backend + * in each request it sends when using that pick. The token is used by the + * backend to verify the request and to allow the backend to report load to the + * gRPC LB system. */ #define GRPC_LB_TOKEN_MD_KEY "lb-token" -/** Metadata key for trailing metadata from servers */ -/* TODO(dgq): change to the final value TBD */ +/** Metadata key for gRPC LB cost reporting. + * + * The value corresponding to this key is an opaque binary blob reported by the + * backend as part of its trailing metadata containing cost information for the + * call. */ #define GRPC_LB_COST_MD_KEY "lb-cost" /** Identifiers for the invocation point of the users LR callback */ |