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 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/cmm/mdc_device.c
38 * Lustre Metadata Client (mdc)
40 * Author: Mike Pershin <tappro@clusterfs.com>
44 # define EXPORT_SYMTAB
46 #define DEBUG_SUBSYSTEM S_MDS
49 #include <obd_class.h>
50 #include <lprocfs_status.h>
51 #include <lustre_ver.h>
52 #include "cmm_internal.h"
53 #include "mdc_internal.h"
55 static const struct lu_device_operations mdc_lu_ops;
57 static inline int lu_device_is_mdc(struct lu_device *ld)
59 return ergo(ld != NULL && ld->ld_ops != NULL,
60 ld->ld_ops == &mdc_lu_ops);
63 static const struct md_device_operations mdc_md_ops = { 0 };
65 static int mdc_obd_update(struct obd_device *host,
66 struct obd_device *watched,
67 enum obd_notify_event ev, void *owner)
69 struct mdc_device *mc = owner;
74 CDEBUG(D_CONFIG, "notify %s ev=%d\n", watched->obd_name, ev);
75 if (ev == OBD_NOTIFY_ACTIVE) {
76 CDEBUG(D_INFO|D_WARNING, "Device %s is active now\n",
78 } else if (ev == OBD_NOTIFY_INACTIVE) {
79 CDEBUG(D_INFO|D_WARNING, "Device %s is inactive now\n",
81 } else if (ev == OBD_NOTIFY_OCD) {
82 struct obd_connect_data *conn_data =
83 &watched->u.cli.cl_import->imp_connect_data;
85 * Update exp_connect_flags.
87 mc->mc_desc.cl_exp->exp_connect_flags =
88 conn_data->ocd_connect_flags;
89 CDEBUG(D_INFO, "Update connect_flags: "LPX64"\n",
90 conn_data->ocd_connect_flags);
95 /* MDC OBD is set up already and connected to the proper MDS
96 * mdc_add_obd() find that obd by uuid and connects to it.
97 * Local MDT uuid is used for connection
99 static int mdc_obd_add(const struct lu_env *env,
100 struct mdc_device *mc, struct lustre_cfg *cfg)
102 struct mdc_cli_desc *desc = &mc->mc_desc;
103 struct obd_device *mdc;
104 const char *uuid_str = lustre_cfg_string(cfg, 1);
105 const char *index = lustre_cfg_string(cfg, 2);
106 const char *mdc_uuid_str = lustre_cfg_string(cfg, 4);
107 struct md_site *ms = lu_site2md(mdc2lu_dev(mc)->ld_site);
115 mc->mc_num = simple_strtol(index, &p, 10);
117 CERROR("Invalid index in lustre_cgf, offset 2\n");
121 obd_str2uuid(&desc->cl_srv_uuid, uuid_str);
122 obd_str2uuid(&desc->cl_cli_uuid, mdc_uuid_str);
123 /* try to find MDC OBD connected to the needed MDT */
124 mdc = class_find_client_obd(&desc->cl_srv_uuid, LUSTRE_MDC_NAME,
127 CERROR("Cannot find MDC OBD connected to %s\n", uuid_str);
129 } else if (!mdc->obd_set_up) {
130 CERROR("target %s not set up\n", mdc->obd_name);
133 struct lustre_handle *conn = &desc->cl_conn;
134 struct obd_connect_data *ocd;
136 CDEBUG(D_CONFIG, "connect to %s(%s)\n",
137 mdc->obd_name, mdc->obd_uuid.uuid);
143 * The connection between MDS must be local,
144 * IBITS are needed for rename_lock (INODELOCK_UPDATE)
146 ocd->ocd_ibits_known = MDS_INODELOCK_UPDATE;
147 ocd->ocd_connect_flags = OBD_CONNECT_VERSION |
149 OBD_CONNECT_LCL_CLIENT |
150 OBD_CONNECT_MDS_CAPA |
151 OBD_CONNECT_OSS_CAPA |
153 OBD_CONNECT_MDS_MDS |
156 rc = obd_connect(env, conn, mdc, &mdc->obd_uuid, ocd, NULL);
159 CERROR("target %s connect error %d\n",
162 desc->cl_exp = class_conn2export(conn);
163 /* set seq controller export for MDC0 if exists */
166 class_export_get(desc->cl_exp);
167 rc = obd_fid_init(desc->cl_exp);
169 CERROR("fid init error %d \n", rc);
171 /* obd notify mechanism */
172 mdc->obd_upcall.onu_owner = mc;
173 mdc->obd_upcall.onu_upcall = mdc_obd_update;
178 obd_disconnect(desc->cl_exp);
186 static int mdc_obd_del(const struct lu_env *env, struct mdc_device *mc,
187 struct lustre_cfg *cfg)
189 struct mdc_cli_desc *desc = &mc->mc_desc;
190 const char *dev = lustre_cfg_string(cfg, 0);
191 struct obd_device *mdc_obd = class_exp2obd(desc->cl_exp);
192 struct obd_device *mdt_obd;
197 CDEBUG(D_CONFIG, "Disconnect from %s\n",
200 /* Set mdt_obd flags in shutdown. */
201 mdt_obd = class_name2obd(dev);
202 LASSERT(mdt_obd != NULL);
204 mdc_obd->obd_no_recov = mdt_obd->obd_no_recov;
205 mdc_obd->obd_force = mdt_obd->obd_force;
206 mdc_obd->obd_fail = 0;
209 rc = obd_fid_fini(desc->cl_exp);
211 CERROR("Fid fini error %d\n", rc);
213 obd_register_observer(mdc_obd, NULL);
214 mdc_obd->obd_upcall.onu_owner = NULL;
215 mdc_obd->obd_upcall.onu_upcall = NULL;
216 rc = obd_disconnect(desc->cl_exp);
218 CERROR("Target %s disconnect error %d\n",
219 mdc_obd->obd_name, rc);
221 class_manual_cleanup(mdc_obd);
227 static int mdc_process_config(const struct lu_env *env,
228 struct lu_device *ld,
229 struct lustre_cfg *cfg)
231 struct mdc_device *mc = lu2mdc_dev(ld);
235 switch (cfg->lcfg_command) {
237 rc = mdc_obd_add(env, mc, cfg);
240 rc = mdc_obd_del(env, mc, cfg);
248 static const struct lu_device_operations mdc_lu_ops = {
249 .ldo_object_alloc = mdc_object_alloc,
250 .ldo_process_config = mdc_process_config
253 void cmm_mdc_init_ea_size(const struct lu_env *env, struct mdc_device *mc,
254 int max_mdsize, int max_cookiesize)
256 struct obd_device *obd = class_exp2obd(mc->mc_desc.cl_exp);
258 obd->u.cli.cl_max_mds_easize = max_mdsize;
259 obd->u.cli.cl_max_mds_cookiesize = max_cookiesize;
262 static int mdc_device_init(const struct lu_env *env, struct lu_device *ld,
263 const char *name, struct lu_device *next)
268 static struct lu_device *mdc_device_fini(const struct lu_env *env,
269 struct lu_device *ld)
275 static struct lu_device *mdc_device_alloc(const struct lu_env *env,
276 struct lu_device_type *ldt,
277 struct lustre_cfg *cfg)
279 struct lu_device *ld;
280 struct mdc_device *mc;
285 ld = ERR_PTR(-ENOMEM);
287 md_device_init(&mc->mc_md_dev, ldt);
288 mc->mc_md_dev.md_ops = &mdc_md_ops;
290 ld->ld_ops = &mdc_lu_ops;
291 sema_init(&mc->mc_fid_sem, 1);
297 static struct lu_device *mdc_device_free(const struct lu_env *env,
298 struct lu_device *ld)
300 struct mdc_device *mc = lu2mdc_dev(ld);
302 LASSERTF(atomic_read(&ld->ld_ref) == 0,
303 "Refcount = %i\n", atomic_read(&ld->ld_ref));
304 LASSERT(list_empty(&mc->mc_linkage));
305 md_device_fini(&mc->mc_md_dev);
310 /* context key constructor/destructor: mdc_key_init, mdc_key_fini */
311 LU_KEY_INIT_FINI(mdc, struct mdc_thread_info);
313 /* context key: mdc_thread_key */
314 LU_CONTEXT_KEY_DEFINE(mdc, LCT_MD_THREAD|LCT_CL_THREAD);
316 /* type constructor/destructor: mdc_type_init, mdc_type_fini */
317 LU_TYPE_INIT_FINI(mdc, &mdc_thread_key);
319 static struct lu_device_type_operations mdc_device_type_ops = {
320 .ldto_init = mdc_type_init,
321 .ldto_fini = mdc_type_fini,
323 .ldto_start = mdc_type_start,
324 .ldto_stop = mdc_type_stop,
326 .ldto_device_alloc = mdc_device_alloc,
327 .ldto_device_free = mdc_device_free,
329 .ldto_device_init = mdc_device_init,
330 .ldto_device_fini = mdc_device_fini
333 struct lu_device_type mdc_device_type = {
334 .ldt_tags = LU_DEVICE_MD,
335 .ldt_name = LUSTRE_CMM_MDC_NAME,
336 .ldt_ops = &mdc_device_type_ops,
337 .ldt_ctx_tags = LCT_MD_THREAD|LCT_CL_THREAD