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/*
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* Copyright (c) 2020 Red Hat, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* $Id: //eng/vdo-releases/aluminum/src/c++/vdo/base/adminCompletion.c#4 $
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*/
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#include "adminCompletion.h"
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#include "logger.h"
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#include "memoryAlloc.h"
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#include "permassert.h"
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#include "atomic.h"
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#include "completion.h"
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#include "types.h"
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#include "vdoInternal.h"
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/**********************************************************************/
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void assertAdminOperationType(AdminCompletion *completion,
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AdminOperationType expected)
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{
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ASSERT_LOG_ONLY(completion->type == expected,
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"admin operation type is %u instead of %u",
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completion->type, expected);
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}
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/**********************************************************************/
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AdminCompletion *adminCompletionFromSubTask(VDOCompletion *completion)
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{
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STATIC_ASSERT(offsetof(AdminCompletion, completion) == 0);
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assertCompletionType(completion->type, SUB_TASK_COMPLETION);
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VDOCompletion *parent = completion->parent;
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assertCompletionType(parent->type, ADMIN_COMPLETION);
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return (AdminCompletion *) parent;
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}
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/**********************************************************************/
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void assertAdminPhaseThread(AdminCompletion *adminCompletion,
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const char *what,
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const char *phaseNames[])
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{
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ThreadID expected = adminCompletion->getThreadID(adminCompletion);
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ASSERT_LOG_ONLY((getCallbackThreadID() == expected),
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"%s on correct thread for %s",
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what, phaseNames[adminCompletion->phase]);
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}
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/**********************************************************************/
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VDO *vdoFromAdminSubTask(VDOCompletion *completion,
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AdminOperationType expected)
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{
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AdminCompletion *adminCompletion = adminCompletionFromSubTask(completion);
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assertAdminOperationType(adminCompletion, expected);
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return adminCompletion->completion.parent;
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}
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/**********************************************************************/
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int initializeAdminCompletion(VDO *vdo, AdminCompletion *adminCompletion)
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{
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int result = initializeEnqueueableCompletion(&adminCompletion->completion,
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ADMIN_COMPLETION, vdo->layer);
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if (result != VDO_SUCCESS) {
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return result;
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}
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result = initializeEnqueueableCompletion(&adminCompletion->subTaskCompletion,
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SUB_TASK_COMPLETION, vdo->layer);
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if (result != VDO_SUCCESS) {
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uninitializeAdminCompletion(adminCompletion);
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return result;
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}
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atomicStoreBool(&adminCompletion->busy, false);
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return VDO_SUCCESS;
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}
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/**********************************************************************/
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void uninitializeAdminCompletion(AdminCompletion *adminCompletion)
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{
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destroyEnqueueable(&adminCompletion->subTaskCompletion);
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destroyEnqueueable(&adminCompletion->completion);
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}
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/**********************************************************************/
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VDOCompletion *resetAdminSubTask(VDOCompletion *completion)
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{
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AdminCompletion *adminCompletion = adminCompletionFromSubTask(completion);
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resetCompletion(completion);
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completion->callbackThreadID = adminCompletion->getThreadID(adminCompletion);
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return completion;
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}
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/**********************************************************************/
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void prepareAdminSubTaskOnThread(VDO *vdo,
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VDOAction *callback,
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VDOAction *errorHandler,
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ThreadID threadID)
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{
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prepareForRequeue(&vdo->adminCompletion.subTaskCompletion, callback,
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errorHandler, threadID, &vdo->adminCompletion);
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}
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/**********************************************************************/
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void prepareAdminSubTask(VDO *vdo,
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VDOAction *callback,
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VDOAction *errorHandler)
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{
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AdminCompletion *adminCompletion = &vdo->adminCompletion;
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prepareAdminSubTaskOnThread(vdo, callback, errorHandler,
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adminCompletion->completion.callbackThreadID);
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}
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/**
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* Callback for admin operations which will notify the layer that the operation
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* is complete.
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*
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* @param completion The admin completion
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**/
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static void adminOperationCallback(VDOCompletion *completion)
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{
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completion->layer->completeAdminOperation(completion->layer);
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}
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/**********************************************************************/
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int performAdminOperation(VDO *vdo,
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AdminOperationType type,
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ThreadIDGetterForPhase *threadIDGetter,
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VDOAction *action,
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VDOAction *errorHandler)
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{
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AdminCompletion *adminCompletion = &vdo->adminCompletion;
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if (!compareAndSwapBool(&adminCompletion->busy, false, true)) {
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return logErrorWithStringError(VDO_COMPONENT_BUSY,
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"Can't start admin operation of type %u, "
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"another operation is already in progress",
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type);
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}
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prepareCompletion(&adminCompletion->completion, adminOperationCallback,
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adminOperationCallback,
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getAdminThread(getThreadConfig(vdo)), vdo);
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adminCompletion->type = type;
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adminCompletion->getThreadID = threadIDGetter;
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adminCompletion->phase = 0;
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prepareAdminSubTask(vdo, action, errorHandler);
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PhysicalLayer *layer = vdo->layer;
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layer->enqueue(adminCompletion->subTaskCompletion.enqueueable);
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layer->waitForAdminOperation(layer);
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int result = adminCompletion->completion.result;
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atomicStoreBool(&adminCompletion->busy, false);
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return result;
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}
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