MXS-1840 Compile all routers as C++
Minimal changes, only what is needed in order to make it compile.
This commit is contained in:
Johan Wikman
731
server/modules/routing/maxinfo/maxinfo.cc
Normal file
731
server/modules/routing/maxinfo/maxinfo.cc
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@ -0,0 +1,731 @@
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/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2020-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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/**
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* @file maxinfo.c - A "routing module" that in fact merely gives access
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* to a MaxScale information schema usign the MySQL protocol
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 16/02/15 Mark Riddoch Initial implementation
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* 27/02/15 Massimiliano Pinto Added maxinfo_add_mysql_user
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* 09/09/2015 Martin Brampton Modify error handler
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*
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* @endverbatim
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*/
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#include "maxinfo.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <maxscale/alloc.h>
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#include <maxscale/service.h>
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#include <maxscale/server.h>
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#include <maxscale/router.h>
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#include <maxscale/modinfo.h>
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#include <maxscale/modutil.h>
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#include <maxscale/monitor.h>
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#include <maxscale/atomic.h>
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#include <maxscale/spinlock.h>
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#include <maxscale/dcb.h>
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#include <maxscale/maxscale.h>
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#include <maxscale/log_manager.h>
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#include <maxscale/resultset.h>
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#include <maxscale/version.h>
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#include <maxscale/resultset.h>
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#include <maxscale/secrets.h>
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#include <maxscale/users.h>
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#include <maxscale/protocol/mysql.h>
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#include "../../../core/internal/modules.h"
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#include "../../../core/internal/monitor.h"
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#include "../../../core/internal/session.h"
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#include "../../../core/internal/poll.h"
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extern char *create_hex_sha1_sha1_passwd(char *passwd);
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static int maxinfo_statistics(INFO_INSTANCE *, INFO_SESSION *, GWBUF *);
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static int maxinfo_ping(INFO_INSTANCE *, INFO_SESSION *, GWBUF *);
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static int maxinfo_execute_query(INFO_INSTANCE *, INFO_SESSION *, char *);
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static int handle_url(INFO_INSTANCE *instance, INFO_SESSION *router_session, GWBUF *queue);
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static int maxinfo_send_ok(DCB *dcb);
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/* The router entry points */
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static MXS_ROUTER *createInstance(SERVICE *service, char **options);
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static MXS_ROUTER_SESSION *newSession(MXS_ROUTER *instance, MXS_SESSION *session);
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static void closeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session);
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static void freeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session);
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static int execute(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session, GWBUF *queue);
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static void diagnostics(MXS_ROUTER *instance, DCB *dcb);
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static json_t* diagnostics_json(const MXS_ROUTER *instance);
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static uint64_t getCapabilities(MXS_ROUTER* instance);
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static void handleError(MXS_ROUTER *instance,
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MXS_ROUTER_SESSION *router_session,
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GWBUF *errbuf,
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DCB *backend_dcb,
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mxs_error_action_t action,
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bool *succp);
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static SPINLOCK instlock;
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static INFO_INSTANCE *instances;
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/**
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* The module entry point routine. It is this routine that
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* must populate the structure that is referred to as the
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* "module object", this is a structure with the set of
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* external entry points for this module.
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*
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* @return The module object
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*/
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extern "C" MXS_MODULE* MXS_CREATE_MODULE()
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{
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MXS_NOTICE("Initialise MaxInfo router module.");
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spinlock_init(&instlock);
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instances = NULL;
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static MXS_ROUTER_OBJECT MyObject =
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{
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createInstance,
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newSession,
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closeSession,
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freeSession,
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execute,
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diagnostics,
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diagnostics_json,
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NULL,
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handleError,
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getCapabilities,
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NULL
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};
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static MXS_MODULE info =
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{
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MXS_MODULE_API_ROUTER,
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MXS_MODULE_ALPHA_RELEASE,
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MXS_ROUTER_VERSION,
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"The MaxScale Information Schema",
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"V1.0.0",
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RCAP_TYPE_NO_AUTH,
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&MyObject,
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NULL, /* Process init. */
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NULL, /* Process finish. */
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NULL, /* Thread init. */
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NULL, /* Thread finish. */
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{
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{MXS_END_MODULE_PARAMS}
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}
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};
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return &info;
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}
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/**
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* Create an instance of the router for a particular service
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* within the gateway.
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*
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* @param service The service this router is being create for
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* @param options Any array of options for the query router
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*
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* @return The instance data for this new instance
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*/
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static MXS_ROUTER *
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createInstance(SERVICE *service, char **options)
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{
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INFO_INSTANCE *inst;
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int i;
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if ((inst = static_cast<INFO_INSTANCE*>(MXS_MALLOC(sizeof(INFO_INSTANCE)))) == NULL)
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{
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return NULL;
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}
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inst->sessions = NULL;
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inst->service = service;
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spinlock_init(&inst->lock);
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if (options)
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{
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for (i = 0; options[i]; i++)
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{
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MXS_ERROR("Unknown option for MaxInfo '%s'", options[i]);
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}
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}
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/*
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* We have completed the creation of the instance data, so now
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* insert this router instance into the linked list of routers
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* that have been created with this module.
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*/
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spinlock_acquire(&instlock);
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inst->next = instances;
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instances = inst;
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spinlock_release(&instlock);
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return (MXS_ROUTER *)inst;
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}
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/**
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* Associate a new session with this instance of the router.
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*
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* @param instance The router instance data
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* @param session The session itself
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* @return Session specific data for this session
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*/
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static MXS_ROUTER_SESSION *
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newSession(MXS_ROUTER *instance, MXS_SESSION *session)
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{
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INFO_INSTANCE *inst = (INFO_INSTANCE *)instance;
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INFO_SESSION *client;
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if ((client = (INFO_SESSION *)MXS_MALLOC(sizeof(INFO_SESSION))) == NULL)
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{
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return NULL;
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}
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client->session = session;
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client->dcb = session->client_dcb;
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client->queue = NULL;
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spinlock_acquire(&inst->lock);
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client->next = inst->sessions;
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inst->sessions = client;
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spinlock_release(&inst->lock);
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session->state = SESSION_STATE_READY;
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return reinterpret_cast<MXS_ROUTER_SESSION*>(client);
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}
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/**
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* Close a session with the router, this is the mechanism
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* by which a router may cleanup data structure etc.
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*
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* @param instance The router instance data
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* @param router_session The session being closed
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*/
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static void
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closeSession(MXS_ROUTER *instance, MXS_ROUTER_SESSION *router_session)
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{
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INFO_INSTANCE *inst = (INFO_INSTANCE *)instance;
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INFO_SESSION *session = (INFO_SESSION *)router_session;
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spinlock_acquire(&inst->lock);
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if (inst->sessions == session)
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{
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inst->sessions = session->next;
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}
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else
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{
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INFO_SESSION *ptr = inst->sessions;
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while (ptr && ptr->next != session)
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{
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ptr = ptr->next;
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}
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if (ptr)
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{
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ptr->next = session->next;
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}
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}
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spinlock_release(&inst->lock);
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/**
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* Router session is freed in session.c:session_close, when session who
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* owns it, is freed.
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*/
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}
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/**
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* Free a maxinfo session
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*
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* @param router_instance The router session
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* @param router_client_session The router session as returned from newSession
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*/
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static void freeSession(MXS_ROUTER* router_instance,
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MXS_ROUTER_SESSION* router_client_session)
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{
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MXS_FREE(router_client_session);
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return;
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}
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/**
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* Error Handler routine
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*
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* The routine will handle errors that occurred in backend writes.
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*
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* @param instance The router instance
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* @param router_session The router session
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* @param message The error message to reply
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* @param backend_dcb The backend DCB
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* @param action The action: ERRACT_NEW_CONNECTION or ERRACT_REPLY_CLIENT
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* @param succp Result of action: true iff router can continue
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*
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*/
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static void handleError(MXS_ROUTER *instance,
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MXS_ROUTER_SESSION *router_session,
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GWBUF *errbuf,
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DCB *backend_dcb,
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mxs_error_action_t action,
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bool *succp)
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{
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ss_dassert(backend_dcb->dcb_role == DCB_ROLE_BACKEND_HANDLER);
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DCB *client_dcb;
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MXS_SESSION *session = backend_dcb->session;
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client_dcb = session->client_dcb;
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if (session->state == SESSION_STATE_ROUTER_READY)
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{
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CHK_DCB(client_dcb);
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client_dcb->func.write(client_dcb, gwbuf_clone(errbuf));
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}
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/** false because connection is not available anymore */
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dcb_close(backend_dcb);
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*succp = false;
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}
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/**
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* We have data from the client, this is a SQL command, or other MySQL
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* packet type.
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*
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* @param instance The router instance
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* @param router_session The router session returned from the newSession call
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* @param queue The queue of data buffers to route
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* @return The number of bytes sent
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*/
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static int
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execute(MXS_ROUTER *rinstance, MXS_ROUTER_SESSION *router_session, GWBUF *queue)
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{
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INFO_INSTANCE *instance = (INFO_INSTANCE *)rinstance;
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INFO_SESSION *session = (INFO_SESSION *)router_session;
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uint8_t *data;
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int length, len, residual;
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char *sql;
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if (GWBUF_TYPE(queue) == GWBUF_TYPE_HTTP)
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{
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return handle_url(instance, session, queue);
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}
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if (session->queue)
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{
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queue = gwbuf_append(session->queue, queue);
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session->queue = NULL;
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queue = gwbuf_make_contiguous(queue);
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}
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data = (uint8_t *)GWBUF_DATA(queue);
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length = data[0] + (data[1] << 8) + (data[2] << 16);
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if (length + 4 > static_cast<int>(GWBUF_LENGTH(queue)))
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{
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// Incomplete packet, must be buffered
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session->queue = queue;
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return 1;
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}
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int rc = 1;
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// We have a complete request in a single buffer
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if (modutil_MySQL_Query(queue, &sql, &len, &residual))
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{
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sql = strndup(sql, len);
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rc = maxinfo_execute_query(instance, session, sql);
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MXS_FREE(sql);
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}
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else
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{
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switch (MYSQL_COMMAND(queue))
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{
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case MXS_COM_PING:
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rc = maxinfo_send_ok(session->dcb);
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break;
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case MXS_COM_STATISTICS:
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rc = maxinfo_statistics(instance, session, queue);
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break;
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case MXS_COM_QUIT:
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break;
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default:
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MXS_ERROR("Unexpected MySQL command 0x%x",
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MYSQL_COMMAND(queue));
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break;
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}
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}
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// MaxInfo doesn't route the data forward so it should be freed.
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gwbuf_free(queue);
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return rc;
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}
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/**
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* Display router diagnostics
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*
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* @param instance Instance of the router
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* @param dcb DCB to send diagnostics to
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*/
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static void
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diagnostics(MXS_ROUTER *instance, DCB *dcb)
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{
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return; /* Nothing to do currently */
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}
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/**
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* Display router diagnostics
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*
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* @param instance Instance of the router
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* @param dcb DCB to send diagnostics to
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*/
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static json_t*
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diagnostics_json(const MXS_ROUTER *instance)
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{
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return NULL;
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}
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/**
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* Capabilities interface for the rotuer
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*
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* Not used for the maxinfo router
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*/
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static uint64_t
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getCapabilities(MXS_ROUTER* instance)
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{
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return RCAP_TYPE_NONE;
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}
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/**
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* Return some basic statistics from the router in response to a COM_STATISTICS
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* request.
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*
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* @param router The router instance
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* @param session The connection that requested the statistics
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* @param queue The statistics request
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*
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* @return non-zero on sucessful send
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*/
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static int
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maxinfo_statistics(INFO_INSTANCE *router, INFO_SESSION *session, GWBUF *queue)
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{
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char result[1000];
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uint8_t *ptr;
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GWBUF *ret;
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int len;
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snprintf(result, 1000,
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"Uptime: %u Threads: %u Sessions: %u ",
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maxscale_uptime(),
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config_threadcount(),
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serviceSessionCountAll());
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if ((ret = gwbuf_alloc(4 + strlen(result))) == NULL)
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{
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return 0;
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}
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len = strlen(result);
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ptr = GWBUF_DATA(ret);
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*ptr++ = len & 0xff;
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*ptr++ = (len & 0xff00) >> 8;
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*ptr++ = (len & 0xff0000) >> 16;
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*ptr++ = 1;
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memcpy(ptr, result, len);
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return session->dcb->func.write(session->dcb, ret);
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}
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||||
/**
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* Respond to a COM_PING command
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*
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* @param router The router instance
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* @param session The connection that requested the ping
|
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* @param queue The ping request
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*/
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static int
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maxinfo_ping(INFO_INSTANCE *router, INFO_SESSION *session, GWBUF *queue)
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{
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uint8_t *ptr;
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GWBUF *ret;
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||||
int len;
|
||||
|
||||
if ((ret = gwbuf_alloc(5)) == NULL)
|
||||
{
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return 0;
|
||||
}
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||||
ptr = GWBUF_DATA(ret);
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||||
*ptr++ = 0x01;
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||||
*ptr++ = 0;
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*ptr++ = 0;
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*ptr++ = 1;
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*ptr = 0; // OK
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||||
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||||
return session->dcb->func.write(session->dcb, ret);
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}
|
||||
|
||||
/**
|
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* Populate the version comment with the MaxScale version
|
||||
*
|
||||
* @param result The result set
|
||||
* @param data Pointer to int which is row count
|
||||
* @return The populated row
|
||||
*/
|
||||
static RESULT_ROW *
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||||
version_comment(RESULTSET *result, void *data)
|
||||
{
|
||||
int *context = (int *)data;
|
||||
RESULT_ROW *row;
|
||||
|
||||
if (*context == 0)
|
||||
{
|
||||
(*context)++;
|
||||
row = resultset_make_row(result);
|
||||
resultset_row_set(row, 0, MAXSCALE_VERSION);
|
||||
return row;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* The hardwired select @@vercom response
|
||||
*
|
||||
* @param dcb The DCB of the client
|
||||
*/
|
||||
static void
|
||||
respond_vercom(DCB *dcb)
|
||||
{
|
||||
RESULTSET *result;
|
||||
int context = 0;
|
||||
|
||||
if ((result = resultset_create(version_comment, &context)) == NULL)
|
||||
{
|
||||
maxinfo_send_error(dcb, 0, "No resources available");
|
||||
return;
|
||||
}
|
||||
resultset_add_column(result, "@@version_comment", 40, COL_TYPE_VARCHAR);
|
||||
resultset_stream_mysql(result, dcb);
|
||||
resultset_free(result);
|
||||
}
|
||||
|
||||
/**
|
||||
* Populate the version comment with the MaxScale version
|
||||
*
|
||||
* @param result The result set
|
||||
* @param data Pointer to int which is row count
|
||||
* @return The populated row
|
||||
*/
|
||||
static RESULT_ROW *
|
||||
starttime_row(RESULTSET *result, void *data)
|
||||
{
|
||||
int *context = (int *)data;
|
||||
RESULT_ROW *row;
|
||||
struct tm tm;
|
||||
static char buf[40];
|
||||
|
||||
if (*context == 0)
|
||||
{
|
||||
(*context)++;
|
||||
row = resultset_make_row(result);
|
||||
sprintf(buf, "%u", (unsigned int)maxscale_started());
|
||||
resultset_row_set(row, 0, buf);
|
||||
return row;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* The hardwired select ... as starttime response
|
||||
*
|
||||
* @param dcb The DCB of the client
|
||||
*/
|
||||
static void
|
||||
respond_starttime(DCB *dcb)
|
||||
{
|
||||
RESULTSET *result;
|
||||
int context = 0;
|
||||
|
||||
if ((result = resultset_create(starttime_row, &context)) == NULL)
|
||||
{
|
||||
maxinfo_send_error(dcb, 0, "No resources available");
|
||||
return;
|
||||
}
|
||||
resultset_add_column(result, "starttime", 40, COL_TYPE_VARCHAR);
|
||||
resultset_stream_mysql(result, dcb);
|
||||
resultset_free(result);
|
||||
}
|
||||
|
||||
/**
|
||||
* Send a MySQL OK packet to the DCB
|
||||
*
|
||||
* @param dcb The DCB to send the OK packet to
|
||||
* @return result of a write call, non-zero if write was successful
|
||||
*/
|
||||
static int
|
||||
maxinfo_send_ok(DCB *dcb)
|
||||
{
|
||||
GWBUF *buf;
|
||||
uint8_t *ptr;
|
||||
|
||||
if ((buf = gwbuf_alloc(11)) == NULL)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
ptr = GWBUF_DATA(buf);
|
||||
*ptr++ = 7; // Payload length
|
||||
*ptr++ = 0;
|
||||
*ptr++ = 0;
|
||||
*ptr++ = 1; // Seqno
|
||||
*ptr++ = 0; // ok
|
||||
*ptr++ = 0;
|
||||
*ptr++ = 0;
|
||||
*ptr++ = 2;
|
||||
*ptr++ = 0;
|
||||
*ptr++ = 0;
|
||||
*ptr++ = 0;
|
||||
return dcb->func.write(dcb, buf);
|
||||
}
|
||||
|
||||
/**
|
||||
* Execute a SQL query against the MaxScale Information Schema
|
||||
*
|
||||
* @param instance The instance strcture
|
||||
* @param session The session pointer
|
||||
* @param sql The SQL to execute
|
||||
*/
|
||||
static int
|
||||
maxinfo_execute_query(INFO_INSTANCE *instance, INFO_SESSION *session, char *sql)
|
||||
{
|
||||
MAXINFO_TREE *tree;
|
||||
PARSE_ERROR err;
|
||||
|
||||
MXS_INFO("SQL statement: '%s' for 0x%p.",
|
||||
sql, session->dcb);
|
||||
if (strcmp(sql, "select @@version_comment limit 1") == 0)
|
||||
{
|
||||
respond_vercom(session->dcb);
|
||||
return 1;
|
||||
}
|
||||
/* Below is a kludge for MonYog, if we see
|
||||
* select unix_timestamp... as starttime
|
||||
* just return the starttime of MaxScale
|
||||
*/
|
||||
if (strncasecmp(sql, "select UNIX_TIMESTAMP",
|
||||
strlen("select UNIX_TIMESTAMP")) == 0
|
||||
&& (strstr(sql, "as starttime") != NULL || strstr(sql, "AS starttime") != NULL))
|
||||
{
|
||||
respond_starttime(session->dcb);
|
||||
return 1;
|
||||
}
|
||||
if (strncasecmp(sql, "set names", 9) == 0)
|
||||
{
|
||||
return maxinfo_send_ok(session->dcb);
|
||||
}
|
||||
if (strncasecmp(sql, "set session", 11) == 0)
|
||||
{
|
||||
return maxinfo_send_ok(session->dcb);
|
||||
}
|
||||
if (strncasecmp(sql, "set @@session", 13) == 0)
|
||||
{
|
||||
return maxinfo_send_ok(session->dcb);
|
||||
}
|
||||
if (strncasecmp(sql, "set autocommit", 14) == 0)
|
||||
{
|
||||
return maxinfo_send_ok(session->dcb);
|
||||
}
|
||||
if (strncasecmp(sql, "SELECT `ENGINES`.`SUPPORT`", 26) == 0)
|
||||
{
|
||||
return maxinfo_send_ok(session->dcb);
|
||||
}
|
||||
if ((tree = maxinfo_parse(sql, &err)) == NULL)
|
||||
{
|
||||
maxinfo_send_parse_error(session->dcb, sql, err);
|
||||
MXS_NOTICE("Failed to parse SQL statement: '%s'.", sql);
|
||||
}
|
||||
else
|
||||
{
|
||||
maxinfo_execute(session->dcb, tree);
|
||||
maxinfo_free_tree(tree);
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Session all result set
|
||||
* @return A resultset for all sessions
|
||||
*/
|
||||
static RESULTSET *
|
||||
maxinfoSessionsAll()
|
||||
{
|
||||
return sessionGetList(SESSION_LIST_ALL);
|
||||
}
|
||||
|
||||
/**
|
||||
* Client session result set
|
||||
* @return A resultset for all sessions
|
||||
*/
|
||||
static RESULTSET *
|
||||
maxinfoClientSessions()
|
||||
{
|
||||
return sessionGetList(SESSION_LIST_CONNECTION);
|
||||
}
|
||||
|
||||
typedef RESULTSET *(*RESULTSETFUNC)();
|
||||
|
||||
/**
|
||||
* Table that maps a URI to a function to call to
|
||||
* to obtain the result set related to that URI
|
||||
*/
|
||||
static struct uri_table
|
||||
{
|
||||
const char *uri;
|
||||
RESULTSETFUNC func;
|
||||
} supported_uri[] =
|
||||
{
|
||||
{ "/services", serviceGetList },
|
||||
{ "/listeners", serviceGetListenerList },
|
||||
{ "/modules", moduleGetList },
|
||||
{ "/monitors", monitorGetList },
|
||||
{ "/sessions", maxinfoSessionsAll },
|
||||
{ "/clients", maxinfoClientSessions },
|
||||
{ "/servers", serverGetList },
|
||||
{ "/variables", maxinfo_variables },
|
||||
{ "/status", maxinfo_status },
|
||||
{ "/event/times", eventTimesGetList },
|
||||
{ NULL, NULL }
|
||||
};
|
||||
|
||||
/**
|
||||
* We have data from the client, this is a HTTP URL
|
||||
*
|
||||
* @param instance The router instance
|
||||
* @param session The router session returned from the newSession call
|
||||
* @param queue The queue of data buffers to route
|
||||
* @return The number of bytes sent
|
||||
*/
|
||||
static int
|
||||
handle_url(INFO_INSTANCE *instance, INFO_SESSION *session, GWBUF *queue)
|
||||
{
|
||||
char *uri;
|
||||
int i;
|
||||
RESULTSET *set;
|
||||
|
||||
uri = (char *)GWBUF_DATA(queue);
|
||||
for (i = 0; supported_uri[i].uri; i++)
|
||||
{
|
||||
if (strcmp(uri, supported_uri[i].uri) == 0)
|
||||
{
|
||||
set = (*supported_uri[i].func)();
|
||||
resultset_stream_json(set, session->dcb);
|
||||
resultset_free(set);
|
||||
}
|
||||
}
|
||||
gwbuf_free(queue);
|
||||
return 1;
|
||||
}
|
||||
Reference in New Issue
Block a user