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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/run_op_kill_cursors.h"
#include "mongo/base/data_cursor.h"
#include "mongo/db/audit.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/cursor_id.h"
#include "mongo/db/cursor_manager.h"
#include "mongo/db/db_raii.h"
#include "mongo/util/exit.h"
namespace mongo {
namespace {
bool killCursorIfAuthorized(OperationContext* opCtx, CursorId id) {
auto cursorManager = CursorManager::get(opCtx);
auto pin = cursorManager->pinCursor(opCtx, id, CursorManager::kNoCheckSession);
if (!pin.isOK()) {
// Either the cursor doesn't exist, or it was killed during the last time it was being
// used, and was cleaned up after this call. Either way, we cannot kill it. Write the
// attempt to the audit log before returning.
audit::logKillCursorsAuthzCheck(opCtx->getClient(), {}, id, pin.getStatus().code());
return false;
}
auto nss = pin.getValue().getCursor()->nss();
invariant(nss.isValid());
boost::optional<AutoStatsTracker> statsTracker;
if (!nss.isCollectionlessCursorNamespace()) {
const boost::optional<int> dbProfilingLevel = boost::none;
statsTracker.emplace(opCtx,
nss,
Top::LockType::NotLocked,
AutoStatsTracker::LogMode::kUpdateTopAndCurop,
dbProfilingLevel);
}
AuthorizationSession* as = AuthorizationSession::get(opCtx->getClient());
auto cursorOwner = pin.getValue().getCursor()->getAuthenticatedUsers();
auto authStatus = as->checkAuthForKillCursors(nss, cursorOwner);
if (!authStatus.isOK()) {
audit::logKillCursorsAuthzCheck(opCtx->getClient(), nss, id, authStatus.code());
return false;
}
// Release the pin so that the cursor can be killed.
pin.getValue().release();
Status killStatus = cursorManager->killCursor(opCtx, id, true /* shouldAudit */);
massert(28697,
killStatus.reason(),
killStatus.code() == ErrorCodes::OK || killStatus.code() == ErrorCodes::CursorNotFound);
return killStatus.isOK();
}
} // namespace
int runOpKillCursors(OperationContext* opCtx, size_t numCursorIds, const char* idsArray) {
ConstDataCursor idsDataCursor(idsArray);
int numKilled = 0;
for (size_t i = 0; i < numCursorIds; i++) {
CursorId nextCursorId = idsDataCursor.readAndAdvance<LittleEndian<int64_t>>();
if (killCursorIfAuthorized(opCtx, nextCursorId)) {
++numKilled;
}
if (globalInShutdownDeprecated()) {
break;
}
}
return numKilled;
}
} // namespace mongo
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