SERVER-28338 KillSessions Support

1 files changed, 91 insertions, 0 deletions

diff --git a/src/mongo/db/kill_sessions_common.cpp b/src/mongo/db/kill_sessions_common.cpp
new file mode 100644
index 00000000000..084e5eeec44
--- /dev/null
+++ b/src/mongo/db/kill_sessions_common.cpp
@@ -0,0 +1,91 @@
+/**
+ * Copyright (C) 2017 MongoDB Inc.
+ *
+ * This program is free software: you can redistribute it and/or  modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * 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 GNU Affero General 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.
+ */
+
+#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kCommand
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/db/kill_sessions_common.h"
+
+#include "mongo/db/client.h"
+#include "mongo/db/operation_context.h"
+#include "mongo/db/service_context.h"
+#include "mongo/db/session_killer.h"
+#include "mongo/util/log.h"
+
+namespace mongo {
+
+SessionKiller::Result killSessionsLocalKillOps(OperationContext* opCtx,
+                                               const SessionKiller::Matcher& matcher) {
+    for (ServiceContext::LockedClientsCursor cursor(opCtx->getClient()->getServiceContext());
+         Client* client = cursor.next();) {
+        invariant(client);
+        stdx::unique_lock<Client> lk(*client);
+
+        OperationContext* opCtxToKill = client->getOperationContext();
+        if (opCtxToKill) {
+            const auto& lsid = opCtxToKill->getLogicalSessionId();
+
+            if (lsid) {
+                if (const KillAllSessionsByPattern* pattern = matcher.match(*lsid)) {
+                    ScopedKillAllSessionsByPatternImpersonator impersonator(opCtx, *pattern);
+
+                    log() << "killing op: " << opCtxToKill->getOpID()
+                          << " as part of killing session: " << lsid->toBSON();
+
+                    opCtx->getServiceContext()->killOperation(opCtxToKill);
+                }
+            }
+        }
+    }
+
+    return {std::vector<HostAndPort>{}};
+}
+
+Status killSessionsCmdHelper(OperationContext* opCtx,
+                             BSONObjBuilder& result,
+                             const KillAllSessionsByPatternSet& patterns) {
+    auto killResult = SessionKiller::get(opCtx)->kill(opCtx, patterns);
+
+    if (!killResult->isOK()) {
+        return killResult->getStatus();
+    }
+
+    if (!killResult->getValue().empty()) {
+        BSONArrayBuilder bab(result.subarrayStart("failedHosts"));
+        for (const auto& host : killResult->getValue()) {
+            bab.append(host.toString());
+        }
+
+        return Status(ErrorCodes::HostUnreachable, "Failed to kill on some hosts");
+    }
+
+    return Status::OK();
+}
+
+}  // namespace mongo