diff options
Diffstat (limited to 'src/core/ext/client_channel/client_channel.c')
| -rw-r--r-- | src/core/ext/client_channel/client_channel.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/src/core/ext/client_channel/client_channel.c b/src/core/ext/client_channel/client_channel.c index 80b4f048c2..d15af0b438 100644 --- a/src/core/ext/client_channel/client_channel.c +++ b/src/core/ext/client_channel/client_channel.c @@ -39,6 +39,7 @@ #include <grpc/support/alloc.h> #include <grpc/support/log.h> +#include <grpc/support/string_util.h> #include <grpc/support/sync.h> #include <grpc/support/useful.h> @@ -123,6 +124,7 @@ typedef struct client_channel_channel_data { /** mutex protecting all variables below in this data structure */ gpr_mu mu; /** currently active load balancer */ + char* lb_policy_name; grpc_lb_policy *lb_policy; /** maps method names to method_parameters structs */ grpc_mdstr_hash_table *method_params_table; @@ -223,6 +225,7 @@ static void watch_lb_policy(grpc_exec_ctx *exec_ctx, channel_data *chand, static void on_resolver_result_changed(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) { channel_data *chand = arg; + char *lb_policy_name = NULL; grpc_lb_policy *lb_policy = NULL; grpc_lb_policy *old_lb_policy; grpc_mdstr_hash_table *method_params_table = NULL; @@ -236,12 +239,11 @@ static void on_resolver_result_changed(grpc_exec_ctx *exec_ctx, void *arg, lb_policy_args.client_channel_factory = chand->client_channel_factory; // Find LB policy name. - const char *lb_policy_name = NULL; const grpc_arg *channel_arg = grpc_channel_args_find(lb_policy_args.args, GRPC_ARG_LB_POLICY_NAME); if (channel_arg != NULL) { GPR_ASSERT(channel_arg->type == GRPC_ARG_STRING); - lb_policy_name = channel_arg->value.string; + lb_policy_name = gpr_strdup(channel_arg->value.string); } // Special case: If all of the addresses are balancer addresses, // assume that we should use the grpclb policy, regardless of what the @@ -265,13 +267,14 @@ static void on_resolver_result_changed(grpc_exec_ctx *exec_ctx, void *arg, "addresses, no backend addresses -- forcing use of grpclb LB " "policy", lb_policy_name); + gpr_free(lb_policy_name); } - lb_policy_name = "grpclb"; + lb_policy_name = gpr_strdup("grpclb"); } } // Use pick_first if nothing was specified and we didn't select grpclb // above. - if (lb_policy_name == NULL) lb_policy_name = "pick_first"; + if (lb_policy_name == NULL) lb_policy_name = gpr_strdup("pick_first"); lb_policy = grpc_lb_policy_create(exec_ctx, lb_policy_name, &lb_policy_args); @@ -299,6 +302,10 @@ static void on_resolver_result_changed(grpc_exec_ctx *exec_ctx, void *arg, } gpr_mu_lock(&chand->mu); + if (lb_policy_name != NULL) { + gpr_free(chand->lb_policy_name); + chand->lb_policy_name = lb_policy_name; + } old_lb_policy = chand->lb_policy; chand->lb_policy = lb_policy; if (chand->method_params_table != NULL) { @@ -426,6 +433,18 @@ static void cc_start_transport_op(grpc_exec_ctx *exec_ctx, gpr_mu_unlock(&chand->mu); } +static void cc_get_channel_info(grpc_exec_ctx *exec_ctx, + grpc_channel_element *elem, + grpc_channel_info *info) { + channel_data *chand = elem->channel_data; + gpr_mu_lock(&chand->mu); + if (info->lb_policy_name != NULL) { + *info->lb_policy_name = chand->lb_policy_name == NULL + ? NULL : gpr_strdup(chand->lb_policy_name); + } + gpr_mu_unlock(&chand->mu); +} + /* Constructor for channel_data */ static void cc_init_channel_elem(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, @@ -465,6 +484,7 @@ static void cc_destroy_channel_elem(grpc_exec_ctx *exec_ctx, chand->interested_parties); GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel"); } + gpr_free(chand->lb_policy_name); if (chand->method_params_table != NULL) { grpc_mdstr_hash_table_unref(chand->method_params_table); } @@ -1048,6 +1068,7 @@ const grpc_channel_filter grpc_client_channel_filter = { cc_init_channel_elem, cc_destroy_channel_elem, cc_get_peer, + cc_get_channel_info, "client-channel", }; |