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27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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30 * Copyright (c) 2011, Whamcloud, Inc.
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;
61 * The md_device_operation for mdc. It is empty.
63 static const struct md_device_operations mdc_md_ops = { 0 };
66 * Upcall handler in mdc. Analog of obd_device::o_notify().
68 static int mdc_obd_update(struct obd_device *host,
69 struct obd_device *watched,
70 enum obd_notify_event ev, void *owner, void *data)
72 struct mdc_device *mc = owner;
77 CDEBUG(D_CONFIG, "notify %s ev=%d\n", watched->obd_name, ev);
78 if (ev == OBD_NOTIFY_ACTIVE) {
79 CDEBUG(D_INFO|D_WARNING, "Device %s is active now\n",
81 } else if (ev == OBD_NOTIFY_INACTIVE) {
82 CDEBUG(D_INFO|D_WARNING, "Device %s is inactive now\n",
84 } else if (ev == OBD_NOTIFY_OCD) {
85 struct obd_connect_data *conn_data =
86 &watched->u.cli.cl_import->imp_connect_data;
88 * Update exp_connect_flags.
90 mc->mc_desc.cl_exp->exp_connect_flags =
91 conn_data->ocd_connect_flags;
92 CDEBUG(D_INFO, "Update connect_flags: "LPX64"\n",
93 conn_data->ocd_connect_flags);
100 * Invoked by configuration command LCFG_ADD_MDC.
102 * MDC OBD is set up already and connected to the proper MDS
103 * mdc_add_obd() find that obd by uuid and connects to it.
104 * Local MDT uuid is used for connection.
106 static int mdc_obd_add(const struct lu_env *env,
107 struct mdc_device *mc, struct lustre_cfg *cfg)
109 struct mdc_cli_desc *desc = &mc->mc_desc;
110 struct obd_device *mdc;
111 const char *uuid_str = lustre_cfg_string(cfg, 1);
112 const char *index = lustre_cfg_string(cfg, 2);
113 const char *mdc_uuid_str = lustre_cfg_string(cfg, 4);
114 struct md_site *ms = lu_site2md(mdc2lu_dev(mc)->ld_site);
122 mc->mc_num = simple_strtol(index, &p, 10);
124 CERROR("Invalid index in lustre_cgf, offset 2\n");
128 obd_str2uuid(&desc->cl_srv_uuid, uuid_str);
129 obd_str2uuid(&desc->cl_cli_uuid, mdc_uuid_str);
130 /* try to find MDC OBD connected to the needed MDT */
131 mdc = class_find_client_obd(&desc->cl_srv_uuid, LUSTRE_MDC_NAME,
134 CERROR("Cannot find MDC OBD connected to %s\n", uuid_str);
136 } else if (!mdc->obd_set_up) {
137 CERROR("target %s not set up\n", mdc->obd_name);
140 struct obd_connect_data *ocd;
142 CDEBUG(D_CONFIG, "connect to %s(%s)\n",
143 mdc->obd_name, mdc->obd_uuid.uuid);
149 * The connection between MDS must be local,
150 * IBITS are needed for rename_lock (INODELOCK_UPDATE)
152 ocd->ocd_ibits_known = MDS_INODELOCK_UPDATE;
153 ocd->ocd_connect_flags = OBD_CONNECT_VERSION |
155 OBD_CONNECT_RMT_CLIENT |
156 OBD_CONNECT_MDS_CAPA |
157 OBD_CONNECT_OSS_CAPA |
159 OBD_CONNECT_BRW_SIZE |
160 OBD_CONNECT_MDS_MDS |
164 OBD_CONNECT_64BITHASH;
165 ocd->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
166 rc = obd_connect(env, &desc->cl_exp, mdc, &mdc->obd_uuid, ocd, NULL);
169 CERROR("target %s connect error %d\n",
172 /* set seq controller export for MDC0 if exists */
175 class_export_get(desc->cl_exp);
176 rc = obd_fid_init(desc->cl_exp);
178 CERROR("fid init error %d \n", rc);
180 /* obd notify mechanism */
181 mdc->obd_upcall.onu_owner = mc;
182 mdc->obd_upcall.onu_upcall = mdc_obd_update;
187 obd_disconnect(desc->cl_exp);
197 * Called when configuration command LCFG_CLEANUP is issued.
199 * This disconnects MDC OBD and cleanup it.
201 static int mdc_obd_del(const struct lu_env *env, struct mdc_device *mc,
202 struct lustre_cfg *cfg)
204 struct mdc_cli_desc *desc = &mc->mc_desc;
205 const char *dev = lustre_cfg_string(cfg, 0);
206 struct obd_device *mdc_obd = class_exp2obd(desc->cl_exp);
207 struct obd_device *mdt_obd;
212 CDEBUG(D_CONFIG, "Disconnect from %s\n",
215 /* Set mdt_obd flags in shutdown. */
216 mdt_obd = class_name2obd(dev);
217 LASSERT(mdt_obd != NULL);
219 mdc_obd->obd_no_recov = mdt_obd->obd_no_recov;
220 mdc_obd->obd_force = mdt_obd->obd_force;
221 mdc_obd->obd_fail = 0;
224 rc = obd_fid_fini(desc->cl_exp);
226 CERROR("Fid fini error %d\n", rc);
228 obd_register_observer(mdc_obd, NULL);
229 mdc_obd->obd_upcall.onu_owner = NULL;
230 mdc_obd->obd_upcall.onu_upcall = NULL;
231 rc = obd_disconnect(desc->cl_exp);
233 CERROR("Target %s disconnect error %d\n",
234 mdc_obd->obd_name, rc);
236 class_manual_cleanup(mdc_obd);
243 * Process config command. Passed to the mdc from mdt.
244 * Supports two commands only - LCFG_ADD_MDC and LCFG_CLEANUP
246 static int mdc_process_config(const struct lu_env *env,
247 struct lu_device *ld,
248 struct lustre_cfg *cfg)
250 struct mdc_device *mc = lu2mdc_dev(ld);
254 switch (cfg->lcfg_command) {
256 rc = mdc_obd_add(env, mc, cfg);
259 rc = mdc_obd_del(env, mc, cfg);
268 * lu_device_operations instance for mdc.
270 static const struct lu_device_operations mdc_lu_ops = {
271 .ldo_object_alloc = mdc_object_alloc,
272 .ldo_process_config = mdc_process_config
276 * Initialize proper easize and cookie size.
278 void cmm_mdc_init_ea_size(const struct lu_env *env, struct mdc_device *mc,
279 int max_mdsize, int max_cookiesize)
281 struct obd_device *obd = class_exp2obd(mc->mc_desc.cl_exp);
283 obd->u.cli.cl_max_mds_easize = max_mdsize;
284 obd->u.cli.cl_max_mds_cookiesize = max_cookiesize;
287 /** Start mdc device */
288 static int mdc_device_init(const struct lu_env *env, struct lu_device *ld,
289 const char *name, struct lu_device *next)
294 /** Stop mdc device. */
295 static struct lu_device *mdc_device_fini(const struct lu_env *env,
296 struct lu_device *ld)
302 /** Allocate new mdc device */
303 static struct lu_device *mdc_device_alloc(const struct lu_env *env,
304 struct lu_device_type *ldt,
305 struct lustre_cfg *cfg)
307 struct lu_device *ld;
308 struct mdc_device *mc;
313 ld = ERR_PTR(-ENOMEM);
315 md_device_init(&mc->mc_md_dev, ldt);
316 mc->mc_md_dev.md_ops = &mdc_md_ops;
318 ld->ld_ops = &mdc_lu_ops;
319 cfs_sema_init(&mc->mc_fid_sem, 1);
325 /** Free mdc device */
326 static struct lu_device *mdc_device_free(const struct lu_env *env,
327 struct lu_device *ld)
329 struct mdc_device *mc = lu2mdc_dev(ld);
331 LASSERTF(cfs_atomic_read(&ld->ld_ref) == 0,
332 "Refcount = %d\n", cfs_atomic_read(&ld->ld_ref));
333 LASSERT(cfs_list_empty(&mc->mc_linkage));
334 md_device_fini(&mc->mc_md_dev);
339 /** context key constructor/destructor: mdc_key_init, mdc_key_fini */
340 LU_KEY_INIT_FINI(mdc, struct mdc_thread_info);
342 /** context key: mdc_thread_key */
343 LU_CONTEXT_KEY_DEFINE(mdc, LCT_MD_THREAD|LCT_CL_THREAD);
345 /** type constructor/destructor: mdc_type_init, mdc_type_fini */
346 LU_TYPE_INIT_FINI(mdc, &mdc_thread_key);
348 static struct lu_device_type_operations mdc_device_type_ops = {
349 .ldto_init = mdc_type_init,
350 .ldto_fini = mdc_type_fini,
352 .ldto_start = mdc_type_start,
353 .ldto_stop = mdc_type_stop,
355 .ldto_device_alloc = mdc_device_alloc,
356 .ldto_device_free = mdc_device_free,
358 .ldto_device_init = mdc_device_init,
359 .ldto_device_fini = mdc_device_fini
362 struct lu_device_type mdc_device_type = {
363 .ldt_tags = LU_DEVICE_MD,
364 .ldt_name = LUSTRE_CMM_MDC_NAME,
365 .ldt_ops = &mdc_device_type_ops,
366 .ldt_ctx_tags = LCT_MD_THREAD|LCT_CL_THREAD