1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * Copyright (c) 2011 Whamcloud, Inc.
36 * This file is part of Lustre, http://www.lustre.org/
37 * Lustre is a trademark of Sun Microsystems, Inc.
39 * lustre/cmm/mdc_device.c
41 * Lustre Metadata Client (mdc)
43 * Author: Mike Pershin <tappro@clusterfs.com>
47 # define EXPORT_SYMTAB
49 #define DEBUG_SUBSYSTEM S_MDS
52 #include <obd_class.h>
53 #include <lprocfs_status.h>
54 #include <lustre_ver.h>
55 #include "cmm_internal.h"
56 #include "mdc_internal.h"
58 static const struct lu_device_operations mdc_lu_ops;
64 * The md_device_operation for mdc. It is empty.
66 static const struct md_device_operations mdc_md_ops = { 0 };
69 * Upcall handler in mdc. Analog of obd_device::o_notify().
71 static int mdc_obd_update(struct obd_device *host,
72 struct obd_device *watched,
73 enum obd_notify_event ev, void *owner, void *data)
75 struct mdc_device *mc = owner;
80 CDEBUG(D_CONFIG, "notify %s ev=%d\n", watched->obd_name, ev);
81 if (ev == OBD_NOTIFY_ACTIVE) {
82 CDEBUG(D_INFO|D_WARNING, "Device %s is active now\n",
84 } else if (ev == OBD_NOTIFY_INACTIVE) {
85 CDEBUG(D_INFO|D_WARNING, "Device %s is inactive now\n",
87 } else if (ev == OBD_NOTIFY_OCD) {
88 struct obd_connect_data *conn_data =
89 &watched->u.cli.cl_import->imp_connect_data;
91 * Update exp_connect_flags.
93 mc->mc_desc.cl_exp->exp_connect_flags =
94 conn_data->ocd_connect_flags;
95 CDEBUG(D_INFO, "Update connect_flags: "LPX64"\n",
96 conn_data->ocd_connect_flags);
102 * Add new mdc device.
103 * Invoked by configuration command LCFG_ADD_MDC.
105 * MDC OBD is set up already and connected to the proper MDS
106 * mdc_add_obd() find that obd by uuid and connects to it.
107 * Local MDT uuid is used for connection.
109 static int mdc_obd_add(const struct lu_env *env,
110 struct mdc_device *mc, struct lustre_cfg *cfg)
112 struct mdc_cli_desc *desc = &mc->mc_desc;
113 struct obd_device *mdc;
114 const char *uuid_str = lustre_cfg_string(cfg, 1);
115 const char *index = lustre_cfg_string(cfg, 2);
116 const char *mdc_uuid_str = lustre_cfg_string(cfg, 4);
117 struct md_site *ms = lu_site2md(mdc2lu_dev(mc)->ld_site);
125 mc->mc_num = simple_strtol(index, &p, 10);
127 CERROR("Invalid index in lustre_cgf, offset 2\n");
131 obd_str2uuid(&desc->cl_srv_uuid, uuid_str);
132 obd_str2uuid(&desc->cl_cli_uuid, mdc_uuid_str);
133 /* try to find MDC OBD connected to the needed MDT */
134 mdc = class_find_client_obd(&desc->cl_srv_uuid, LUSTRE_MDC_NAME,
137 CERROR("Cannot find MDC OBD connected to %s\n", uuid_str);
139 } else if (!mdc->obd_set_up) {
140 CERROR("target %s not set up\n", mdc->obd_name);
143 struct obd_connect_data *ocd;
145 CDEBUG(D_CONFIG, "connect to %s(%s)\n",
146 mdc->obd_name, mdc->obd_uuid.uuid);
152 * The connection between MDS must be local,
153 * IBITS are needed for rename_lock (INODELOCK_UPDATE)
155 ocd->ocd_ibits_known = MDS_INODELOCK_UPDATE;
156 ocd->ocd_connect_flags = OBD_CONNECT_VERSION |
158 OBD_CONNECT_RMT_CLIENT |
159 OBD_CONNECT_MDS_CAPA |
160 OBD_CONNECT_OSS_CAPA |
162 OBD_CONNECT_BRW_SIZE |
163 OBD_CONNECT_MDS_MDS |
167 OBD_CONNECT_64BITHASH;
168 ocd->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
169 rc = obd_connect(env, &desc->cl_exp, mdc, &mdc->obd_uuid, ocd, NULL);
172 CERROR("target %s connect error %d\n",
175 /* set seq controller export for MDC0 if exists */
178 class_export_get(desc->cl_exp);
179 rc = obd_fid_init(desc->cl_exp);
181 CERROR("fid init error %d \n", rc);
183 /* obd notify mechanism */
184 mdc->obd_upcall.onu_owner = mc;
185 mdc->obd_upcall.onu_upcall = mdc_obd_update;
190 obd_disconnect(desc->cl_exp);
200 * Called when configuration command LCFG_CLEANUP is issued.
202 * This disconnects MDC OBD and cleanup it.
204 static int mdc_obd_del(const struct lu_env *env, struct mdc_device *mc,
205 struct lustre_cfg *cfg)
207 struct mdc_cli_desc *desc = &mc->mc_desc;
208 const char *dev = lustre_cfg_string(cfg, 0);
209 struct obd_device *mdc_obd = class_exp2obd(desc->cl_exp);
210 struct obd_device *mdt_obd;
215 CDEBUG(D_CONFIG, "Disconnect from %s\n",
218 /* Set mdt_obd flags in shutdown. */
219 mdt_obd = class_name2obd(dev);
220 LASSERT(mdt_obd != NULL);
222 mdc_obd->obd_no_recov = mdt_obd->obd_no_recov;
223 mdc_obd->obd_force = mdt_obd->obd_force;
224 mdc_obd->obd_fail = 0;
227 rc = obd_fid_fini(desc->cl_exp);
229 CERROR("Fid fini error %d\n", rc);
231 obd_register_observer(mdc_obd, NULL);
232 mdc_obd->obd_upcall.onu_owner = NULL;
233 mdc_obd->obd_upcall.onu_upcall = NULL;
234 rc = obd_disconnect(desc->cl_exp);
236 CERROR("Target %s disconnect error %d\n",
237 mdc_obd->obd_name, rc);
239 class_manual_cleanup(mdc_obd);
246 * Process config command. Passed to the mdc from mdt.
247 * Supports two commands only - LCFG_ADD_MDC and LCFG_CLEANUP
249 static int mdc_process_config(const struct lu_env *env,
250 struct lu_device *ld,
251 struct lustre_cfg *cfg)
253 struct mdc_device *mc = lu2mdc_dev(ld);
257 switch (cfg->lcfg_command) {
259 rc = mdc_obd_add(env, mc, cfg);
262 rc = mdc_obd_del(env, mc, cfg);
271 * lu_device_operations instance for mdc.
273 static const struct lu_device_operations mdc_lu_ops = {
274 .ldo_object_alloc = mdc_object_alloc,
275 .ldo_process_config = mdc_process_config
279 * Initialize proper easize and cookie size.
281 void cmm_mdc_init_ea_size(const struct lu_env *env, struct mdc_device *mc,
282 int max_mdsize, int max_cookiesize)
284 struct obd_device *obd = class_exp2obd(mc->mc_desc.cl_exp);
286 obd->u.cli.cl_max_mds_easize = max_mdsize;
287 obd->u.cli.cl_max_mds_cookiesize = max_cookiesize;
290 /** Start mdc device */
291 static int mdc_device_init(const struct lu_env *env, struct lu_device *ld,
292 const char *name, struct lu_device *next)
297 /** Stop mdc device. */
298 static struct lu_device *mdc_device_fini(const struct lu_env *env,
299 struct lu_device *ld)
305 /** Allocate new mdc device */
306 static struct lu_device *mdc_device_alloc(const struct lu_env *env,
307 struct lu_device_type *ldt,
308 struct lustre_cfg *cfg)
310 struct lu_device *ld;
311 struct mdc_device *mc;
316 ld = ERR_PTR(-ENOMEM);
318 md_device_init(&mc->mc_md_dev, ldt);
319 mc->mc_md_dev.md_ops = &mdc_md_ops;
321 ld->ld_ops = &mdc_lu_ops;
322 cfs_sema_init(&mc->mc_fid_sem, 1);
328 /** Free mdc device */
329 static struct lu_device *mdc_device_free(const struct lu_env *env,
330 struct lu_device *ld)
332 struct mdc_device *mc = lu2mdc_dev(ld);
334 LASSERTF(cfs_atomic_read(&ld->ld_ref) == 0,
335 "Refcount = %d\n", cfs_atomic_read(&ld->ld_ref));
336 LASSERT(cfs_list_empty(&mc->mc_linkage));
337 md_device_fini(&mc->mc_md_dev);
342 /** context key constructor/destructor: mdc_key_init, mdc_key_fini */
343 LU_KEY_INIT_FINI(mdc, struct mdc_thread_info);
345 /** context key: mdc_thread_key */
346 LU_CONTEXT_KEY_DEFINE(mdc, LCT_MD_THREAD|LCT_CL_THREAD);
348 /** type constructor/destructor: mdc_type_init, mdc_type_fini */
349 LU_TYPE_INIT_FINI(mdc, &mdc_thread_key);
351 static struct lu_device_type_operations mdc_device_type_ops = {
352 .ldto_init = mdc_type_init,
353 .ldto_fini = mdc_type_fini,
355 .ldto_start = mdc_type_start,
356 .ldto_stop = mdc_type_stop,
358 .ldto_device_alloc = mdc_device_alloc,
359 .ldto_device_free = mdc_device_free,
361 .ldto_device_init = mdc_device_init,
362 .ldto_device_fini = mdc_device_fini
365 struct lu_device_type mdc_device_type = {
366 .ldt_tags = LU_DEVICE_MD,
367 .ldt_name = LUSTRE_CMM_MDC_NAME,
368 .ldt_ops = &mdc_device_type_ops,
369 .ldt_ctx_tags = LCT_MD_THREAD|LCT_CL_THREAD