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@ -1,104 +1,109 @@ |
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//
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// Copyright 2017, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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/*
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* |
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* Copyright 2017, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#include "src/core/lib/channel/message_size_filter.h" |
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#include <limits.h> |
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#include <string.h> |
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#include <grpc/support/log.h> |
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#include "src/core/lib/channel/channel_args.h" |
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#include "src/core/lib/iomgr/timer.h" |
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#include "src/core/lib/transport/http2_errors.h" |
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#include "src/core/lib/transport/service_config.h" |
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#define DEFAULT_MAX_CONNECTION_AGE_S INT_MAX |
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#define DEFAULT_MAX_CONNECTION_AGE_GRACE_S INT_MAX |
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#define DEFAULT_MAX_CONNECTION_IDLE_S INT_MAX |
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#define DEFAULT_MAX_CONNECTION_AGE_MS INT_MAX |
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#define DEFAULT_MAX_CONNECTION_AGE_GRACE_MS INT_MAX |
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#define DEFAULT_MAX_CONNECTION_IDLE_MS INT_MAX |
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typedef struct channel_data { |
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// We take a reference to the channel stack for the timer callback
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/* We take a reference to the channel stack for the timer callback */ |
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grpc_channel_stack* channel_stack; |
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// Guards access to max_age_timer, max_age_timer_pending, max_age_grace_timer
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// and max_age_grace_timer_pending
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/* Guards access to max_age_timer, max_age_timer_pending, max_age_grace_timer
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and max_age_grace_timer_pending */ |
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gpr_mu max_age_timer_mu; |
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// True if the max_age timer callback is currently pending
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/* True if the max_age timer callback is currently pending */ |
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bool max_age_timer_pending; |
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// True if the max_age_grace timer callback is currently pending
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/* True if the max_age_grace timer callback is currently pending */ |
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bool max_age_grace_timer_pending; |
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// The timer for checking if the channel has reached its max age
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/* The timer for checking if the channel has reached its max age */ |
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grpc_timer max_age_timer; |
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// The timer for checking if the max-aged channel has uesed up the grace
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// period
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/* The timer for checking if the max-aged channel has uesed up the grace
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period */ |
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grpc_timer max_age_grace_timer; |
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// The timer for checking if the channel's idle duration reaches
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// max_connection_idle
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/* The timer for checking if the channel's idle duration reaches
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max_connection_idle */ |
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grpc_timer max_idle_timer; |
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// Allowed max time a channel may have no outstanding rpcs
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/* Allowed max time a channel may have no outstanding rpcs */ |
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gpr_timespec max_connection_idle; |
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// Allowed max time a channel may exist
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/* Allowed max time a channel may exist */ |
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gpr_timespec max_connection_age; |
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// Allowed grace period after the channel reaches its max age
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/* Allowed grace period after the channel reaches its max age */ |
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gpr_timespec max_connection_age_grace; |
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// Closure to run when the channel's idle duration reaches max_connection_idle
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// and should be closed gracefully
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/* Closure to run when the channel's idle duration reaches max_connection_idle
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and should be closed gracefully */ |
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grpc_closure close_max_idle_channel; |
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// Closure to run when the channel reaches its max age and should be closed
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// gracefully
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/* Closure to run when the channel reaches its max age and should be closed
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gracefully */ |
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grpc_closure close_max_age_channel; |
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// Closure to run the channel uses up its max age grace time and should be
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// closed forcibly
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/* Closure to run the channel uses up its max age grace time and should be
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closed forcibly */ |
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grpc_closure force_close_max_age_channel; |
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// Closure to run when the init fo channel stack is done and the max_idle
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// timer should be started
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/* Closure to run when the init fo channel stack is done and the max_idle
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timer should be started */ |
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grpc_closure start_max_idle_timer_after_init; |
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// Closure to run when the init fo channel stack is done and the max_age timer
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// should be started
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/* Closure to run when the init fo channel stack is done and the max_age timer
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should be started */ |
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grpc_closure start_max_age_timer_after_init; |
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// Closure to run when the goaway op is finished and the max_age_timer
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/* Closure to run when the goaway op is finished and the max_age_timer */ |
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grpc_closure start_max_age_grace_timer_after_goaway_op; |
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// Closure to run when the channel connectivity state changes
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/* Closure to run when the channel connectivity state changes */ |
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grpc_closure channel_connectivity_changed; |
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// Records the current connectivity state
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/* Records the current connectivity state */ |
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grpc_connectivity_state connectivity_state; |
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// Number of active calls
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/* Number of active calls */ |
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gpr_atm call_count; |
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} channel_data; |
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/* Increase the nubmer of active calls. Before the increasement, if there are no
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calls, the max_idle_timer should be cancelled. */ |
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static void increase_call_count(grpc_exec_ctx* exec_ctx, channel_data* chand) { |
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if (gpr_atm_full_fetch_add(&chand->call_count, 1) == 0) { |
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grpc_timer_cancel(exec_ctx, &chand->max_idle_timer); |
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} |
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} |
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/* Decrease the nubmer of active calls. After the decrement, if there are no
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calls, the max_idle_timer should be started. */ |
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static void decrease_call_count(grpc_exec_ctx* exec_ctx, channel_data* chand) { |
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if (gpr_atm_full_fetch_add(&chand->call_count, -1) == 1) { |
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GRPC_CHANNEL_STACK_REF(chand->channel_stack, "max_age max_idle_timer"); |
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@ -112,6 +117,9 @@ static void decrease_call_count(grpc_exec_ctx* exec_ctx, channel_data* chand) { |
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static void start_max_idle_timer_after_init(grpc_exec_ctx* exec_ctx, void* arg, |
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grpc_error* error) { |
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channel_data* chand = arg; |
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/* Decrease call_count. If there are no active calls at this time,
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max_idle_timer will start here. If the number of active calls is not 0, |
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max_idle_timer will start after all the active calls end. */ |
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decrease_call_count(exec_ctx, chand); |
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GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->channel_stack, |
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"max_age start_max_idle_timer_after_init"); |
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@ -180,7 +188,6 @@ static void close_max_age_channel(grpc_exec_ctx* exec_ctx, void* arg, |
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chand->max_age_timer_pending = false; |
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gpr_mu_unlock(&chand->max_age_timer_mu); |
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if (error == GRPC_ERROR_NONE) { |
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gpr_log(GPR_DEBUG, "close_max_age_channel"); |
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GRPC_CHANNEL_STACK_REF(chand->channel_stack, |
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"max_age start_max_age_grace_timer_after_goaway_op"); |
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grpc_transport_op* op = grpc_make_transport_op( |
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@ -205,7 +212,6 @@ static void force_close_max_age_channel(grpc_exec_ctx* exec_ctx, void* arg, |
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chand->max_age_grace_timer_pending = false; |
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gpr_mu_unlock(&chand->max_age_timer_mu); |
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if (error == GRPC_ERROR_NONE) { |
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gpr_log(GPR_DEBUG, "force_close_max_age_channel"); |
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grpc_transport_op* op = grpc_make_transport_op(NULL); |
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op->disconnect_with_error = |
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GRPC_ERROR_CREATE_FROM_STATIC_STRING("Channel reaches max age"); |
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@ -239,11 +245,14 @@ static void channel_connectivity_changed(grpc_exec_ctx* exec_ctx, void* arg, |
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chand->max_age_grace_timer_pending = false; |
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} |
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gpr_mu_unlock(&chand->max_age_timer_mu); |
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/* If there are no active calls, this increasement will cancel
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max_idle_timer, and prevent max_idle_timer from being started in the |
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future. */ |
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increase_call_count(exec_ctx, chand); |
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} |
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} |
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// Constructor for call_data.
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/* Constructor for call_data. */ |
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static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx, |
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grpc_call_element* elem, |
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const grpc_call_element_args* args) { |
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@ -252,7 +261,7 @@ static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx, |
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return GRPC_ERROR_NONE; |
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} |
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// Destructor for call_data.
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/* Destructor for call_data. */ |
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static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem, |
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const grpc_call_final_info* final_info, |
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grpc_closure* ignored) { |
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@ -260,7 +269,7 @@ static void destroy_call_elem(grpc_exec_ctx* exec_ctx, grpc_call_element* elem, |
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decrease_call_count(exec_ctx, chand); |
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} |
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// Constructor for channel_data.
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/* Constructor for channel_data. */ |
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static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx, |
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grpc_channel_element* elem, |
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grpc_channel_element_args* args) { |
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@ -270,44 +279,44 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx, |
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chand->max_age_grace_timer_pending = false; |
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chand->channel_stack = args->channel_stack; |
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chand->max_connection_age = |
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DEFAULT_MAX_CONNECTION_AGE_S == INT_MAX |
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DEFAULT_MAX_CONNECTION_AGE_MS == INT_MAX |
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? gpr_inf_future(GPR_TIMESPAN) |
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: gpr_time_from_seconds(DEFAULT_MAX_CONNECTION_AGE_S, GPR_TIMESPAN); |
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: gpr_time_from_millis(DEFAULT_MAX_CONNECTION_AGE_MS, GPR_TIMESPAN); |
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chand->max_connection_age_grace = |
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DEFAULT_MAX_CONNECTION_AGE_GRACE_S == INT_MAX |
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DEFAULT_MAX_CONNECTION_AGE_GRACE_MS == INT_MAX |
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? gpr_inf_future(GPR_TIMESPAN) |
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: gpr_time_from_seconds(DEFAULT_MAX_CONNECTION_AGE_GRACE_S, |
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GPR_TIMESPAN); |
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: gpr_time_from_millis(DEFAULT_MAX_CONNECTION_AGE_GRACE_MS, |
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GPR_TIMESPAN); |
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chand->max_connection_idle = |
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DEFAULT_MAX_CONNECTION_IDLE_S == INT_MAX |
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DEFAULT_MAX_CONNECTION_IDLE_MS == INT_MAX |
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? gpr_inf_future(GPR_TIMESPAN) |
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: gpr_time_from_seconds(DEFAULT_MAX_CONNECTION_IDLE_S, GPR_TIMESPAN); |
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: gpr_time_from_millis(DEFAULT_MAX_CONNECTION_IDLE_MS, GPR_TIMESPAN); |
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for (size_t i = 0; i < args->channel_args->num_args; ++i) { |
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if (0 == strcmp(args->channel_args->args[i].key, |
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GRPC_ARG_MAX_CONNECTION_AGE_S)) { |
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GRPC_ARG_MAX_CONNECTION_AGE_MS)) { |
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const int value = grpc_channel_arg_get_integer( |
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&args->channel_args->args[i], |
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(grpc_integer_options){DEFAULT_MAX_CONNECTION_AGE_S, 1, INT_MAX}); |
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(grpc_integer_options){DEFAULT_MAX_CONNECTION_AGE_MS, 1, INT_MAX}); |
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chand->max_connection_age = |
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value == INT_MAX ? gpr_inf_future(GPR_TIMESPAN) |
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: gpr_time_from_seconds(value, GPR_TIMESPAN); |
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: gpr_time_from_millis(value, GPR_TIMESPAN); |
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} else if (0 == strcmp(args->channel_args->args[i].key, |
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GRPC_ARG_MAX_CONNECTION_AGE_GRACE_S)) { |
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GRPC_ARG_MAX_CONNECTION_AGE_GRACE_MS)) { |
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const int value = grpc_channel_arg_get_integer( |
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&args->channel_args->args[i], |
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(grpc_integer_options){DEFAULT_MAX_CONNECTION_AGE_GRACE_S, 0, |
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(grpc_integer_options){DEFAULT_MAX_CONNECTION_AGE_GRACE_MS, 0, |
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INT_MAX}); |
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chand->max_connection_age_grace = |
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value == INT_MAX ? gpr_inf_future(GPR_TIMESPAN) |
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: gpr_time_from_seconds(value, GPR_TIMESPAN); |
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: gpr_time_from_millis(value, GPR_TIMESPAN); |
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} else if (0 == strcmp(args->channel_args->args[i].key, |
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GRPC_ARG_MAX_CONNECTION_IDLE_S)) { |
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GRPC_ARG_MAX_CONNECTION_IDLE_MS)) { |
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const int value = grpc_channel_arg_get_integer( |
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&args->channel_args->args[i], |
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(grpc_integer_options){DEFAULT_MAX_CONNECTION_IDLE_S, 1, INT_MAX}); |
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(grpc_integer_options){DEFAULT_MAX_CONNECTION_IDLE_MS, 1, INT_MAX}); |
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chand->max_connection_idle = |
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value == INT_MAX ? gpr_inf_future(GPR_TIMESPAN) |
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: gpr_time_from_seconds(value, GPR_TIMESPAN); |
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: gpr_time_from_millis(value, GPR_TIMESPAN); |
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} |
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} |
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grpc_closure_init(&chand->close_max_idle_channel, close_max_idle_channel, |
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@ -332,19 +341,21 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx, |
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if (gpr_time_cmp(chand->max_connection_age, gpr_inf_future(GPR_TIMESPAN)) != |
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0) { |
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// When the channel reaches its max age, we send down an op with
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// goaway_error set. However, we can't send down any ops until after the
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// channel stack is fully initialized. If we start the timer here, we have
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// no guarantee that the timer won't pop before channel stack initialization
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// is finished. To avoid that problem, we create a closure to start the
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// timer, and we schedule that closure to be run after call stack
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// initialization is done.
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/* When the channel reaches its max age, we send down an op with
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goaway_error set. However, we can't send down any ops until after the |
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channel stack is fully initialized. If we start the timer here, we have |
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no guarantee that the timer won't pop before channel stack initialization |
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is finished. To avoid that problem, we create a closure to start the |
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timer, and we schedule that closure to be run after call stack |
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initialization is done. */ |
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GRPC_CHANNEL_STACK_REF(chand->channel_stack, |
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"max_age start_max_age_timer_after_init"); |
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grpc_closure_sched(exec_ctx, &chand->start_max_age_timer_after_init, |
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GRPC_ERROR_NONE); |
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} |
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/* Initialize the number of calls as 1, so that the max_idle_timer will not
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start until start_max_idle_timer_after_init is invoked. */ |
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gpr_atm_rel_store(&chand->call_count, 1); |
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if (gpr_time_cmp(chand->max_connection_idle, gpr_inf_future(GPR_TIMESPAN)) != |
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0) { |
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@ -356,14 +367,14 @@ static grpc_error* init_channel_elem(grpc_exec_ctx* exec_ctx, |
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return GRPC_ERROR_NONE; |
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} |
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// Destructor for channel_data.
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/* Destructor for channel_data. */ |
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static void destroy_channel_elem(grpc_exec_ctx* exec_ctx, |
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grpc_channel_element* elem) {} |
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const grpc_channel_filter grpc_max_age_filter = { |
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grpc_call_next_op, |
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grpc_channel_next_op, |
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0, // sizeof_call_data
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0, /* sizeof_call_data */ |
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init_call_elem, |
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grpc_call_stack_ignore_set_pollset_or_pollset_set, |
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destroy_call_elem, |
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