1 /* -*- MODE: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
5 * Lustre Metadata Server (mdd) routines
7 * Copyright (C) 2006 Cluster File Systems, Inc.
8 * Author: Wang Di <wangdi@clusterfs.com>
10 * This file is part of the Lustre file system, http://www.lustre.org
11 * Lustre is a trademark of Cluster File Systems, Inc.
13 * You may have signed or agreed to another license before downloading
14 * this software. If so, you are bound by the terms and conditions
15 * of that agreement, and the following does not apply to you. See the
16 * LICENSE file included with this distribution for more information.
18 * If you did not agree to a different license, then this copy of Lustre
19 * is open source software; you can redistribute it and/or modify it
20 * under the terms of version 2 of the GNU General Public License as
21 * published by the Free Software Foundation.
23 * In either case, Lustre is distributed in the hope that it will be
24 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
25 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * license text for more details.
29 # define EXPORT_SYMTAB
31 #define DEBUG_SUBSYSTEM S_MDS
33 #include <linux/module.h>
34 #include <linux/jbd.h>
36 #include <obd_class.h>
37 #include <lustre_ver.h>
38 #include <obd_support.h>
39 #include <lprocfs_status.h>
41 #include <linux/ldiskfs_fs.h>
42 #include <lustre_mds.h>
43 #include <lustre/lustre_idl.h>
45 #include "mdd_internal.h"
47 struct md_device_operations mdd_ops;
49 static const char *mdd_root_dir_name = "root";
50 static int mdd_device_init(const struct lu_env *env, struct lu_device *d,
51 const char *name, struct lu_device *next)
53 struct mdd_device *mdd = lu2mdd_dev(d);
57 mdd->mdd_child = lu2dt_dev(next);
59 /* Prepare transactions callbacks. */
60 mdd->mdd_txn_cb.dtc_txn_start = mdd_txn_start_cb;
61 mdd->mdd_txn_cb.dtc_txn_stop = mdd_txn_stop_cb;
62 mdd->mdd_txn_cb.dtc_txn_commit = mdd_txn_commit_cb;
63 mdd->mdd_txn_cb.dtc_cookie = mdd;
64 CFS_INIT_LIST_HEAD(&mdd->mdd_txn_cb.dtc_linkage);
65 mdd->mdd_atime_diff = MAX_ATIME_DIFF;
67 rc = mdd_procfs_init(mdd, name);
71 static struct lu_device *mdd_device_fini(const struct lu_env *env,
74 struct mdd_device *mdd = lu2mdd_dev(d);
75 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
78 rc = mdd_procfs_fini(mdd);
80 CERROR("proc fini error %d \n", rc);
86 static int mdd_mount(const struct lu_env *env, struct mdd_device *mdd)
89 struct dt_object *root;
92 dt_txn_callback_add(mdd->mdd_child, &mdd->mdd_txn_cb);
93 root = dt_store_open(env, mdd->mdd_child, mdd_root_dir_name,
96 LASSERT(root != NULL);
97 lu_object_put(env, &root->do_lu);
98 rc = orph_index_init(env, mdd);
105 static void mdd_device_shutdown(const struct lu_env *env,
106 struct mdd_device *m, struct lustre_cfg *cfg)
109 dt_txn_callback_del(m->mdd_child, &m->mdd_txn_cb);
111 mdd_fini_obd(env, m, cfg);
112 orph_index_fini(env, m);
113 /* remove upcall device*/
114 md_upcall_fini(&m->mdd_md_dev);
118 static int mdd_process_config(const struct lu_env *env,
119 struct lu_device *d, struct lustre_cfg *cfg)
121 struct mdd_device *m = lu2mdd_dev(d);
122 struct dt_device *dt = m->mdd_child;
123 struct lu_device *next = &dt->dd_lu_dev;
127 switch (cfg->lcfg_command) {
129 rc = next->ld_ops->ldo_process_config(env, next, cfg);
132 dt->dd_ops->dt_conf_get(env, dt, &m->mdd_dt_conf);
134 rc = mdd_init_obd(env, m, cfg);
136 CERROR("lov init error %d \n", rc);
139 rc = mdd_mount(env, m);
142 rc = mdd_txn_init_credits(env, m);
145 mdd_device_shutdown(env, m, cfg);
147 rc = next->ld_ops->ldo_process_config(env, next, cfg);
154 static int mdd_lov_set_nextid(const struct lu_env *env,
155 struct mdd_device *mdd)
157 struct mds_obd *mds = &mdd->mdd_obd_dev->u.mds;
161 LASSERT(mds->mds_lov_objids != NULL);
162 rc = obd_set_info_async(mds->mds_osc_exp, strlen(KEY_NEXT_ID),
163 KEY_NEXT_ID, mds->mds_lov_desc.ld_tgt_count,
164 mds->mds_lov_objids, NULL);
169 static int mdd_cleanup_unlink_llog(const struct lu_env *env,
170 struct mdd_device *mdd)
172 /* XXX: to be implemented! */
177 static int mdd_recovery_complete(const struct lu_env *env,
180 struct mdd_device *mdd = lu2mdd_dev(d);
181 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
182 struct obd_device *obd = mdd2obd_dev(mdd);
186 LASSERT(mdd != NULL);
187 LASSERT(obd != NULL);
189 /* XXX: Do we need this in new stack? */
190 rc = mdd_lov_set_nextid(env, mdd);
192 CERROR("mdd_lov_set_nextid() failed %d\n",
197 /* XXX: cleanup unlink. */
198 rc = mdd_cleanup_unlink_llog(env, mdd);
200 CERROR("mdd_cleanup_unlink_llog() failed %d\n",
205 /* Call that with obd_recovering = 1 just to update objids */
206 obd_notify(obd->u.mds.mds_osc_obd, NULL, (obd->obd_async_recov ?
207 OBD_NOTIFY_SYNC_NONBLOCK : OBD_NOTIFY_SYNC), NULL);
209 /* Drop obd_recovering to 0 and call o_postrecov to recover mds_lov */
210 obd->obd_recovering = 0;
211 obd->obd_type->typ_dt_ops->o_postrecov(obd);
213 /* XXX: orphans handling. */
214 __mdd_orphan_cleanup(env, mdd);
215 rc = next->ld_ops->ldo_recovery_complete(env, next);
220 struct lu_device_operations mdd_lu_ops = {
221 .ldo_object_alloc = mdd_object_alloc,
222 .ldo_process_config = mdd_process_config,
223 .ldo_recovery_complete = mdd_recovery_complete
227 * No permission check is needed.
229 static int mdd_root_get(const struct lu_env *env,
230 struct md_device *m, struct lu_fid *f)
232 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
235 *f = mdd->mdd_root_fid;
240 * No permission check is needed.
242 static int mdd_statfs(const struct lu_env *env, struct md_device *m,
245 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
250 rc = mdd_child_ops(mdd)->dt_statfs(env, mdd->mdd_child, sfs);
256 * No permission check is needed.
258 static int mdd_maxsize_get(const struct lu_env *env, struct md_device *m,
259 int *md_size, int *cookie_size)
261 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
264 *md_size = mdd_lov_mdsize(env, mdd);
265 *cookie_size = mdd_lov_cookiesize(env, mdd);
270 static int mdd_init_capa_ctxt(const struct lu_env *env, struct md_device *m,
271 int mode, unsigned long timeout, __u32 alg,
272 struct lustre_capa_key *keys)
274 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
275 struct mds_obd *mds = &mdd2obd_dev(mdd)->u.mds;
279 mds->mds_capa_keys = keys;
280 rc = mdd_child_ops(mdd)->dt_init_capa_ctxt(env, mdd->mdd_child, mode,
285 static int mdd_update_capa_key(const struct lu_env *env,
287 struct lustre_capa_key *key)
289 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
290 struct obd_export *lov_exp = mdd2obd_dev(mdd)->u.mds.mds_osc_exp;
294 rc = obd_set_info_async(lov_exp, sizeof(KEY_CAPA_KEY), KEY_CAPA_KEY,
295 sizeof(*key), key, NULL);
299 static struct lu_device *mdd_device_alloc(const struct lu_env *env,
300 struct lu_device_type *t,
301 struct lustre_cfg *lcfg)
304 struct mdd_device *m;
308 l = ERR_PTR(-ENOMEM);
310 md_device_init(&m->mdd_md_dev, t);
312 l->ld_ops = &mdd_lu_ops;
313 m->mdd_md_dev.md_ops = &mdd_ops;
314 md_upcall_init(&m->mdd_md_dev, NULL);
320 static struct lu_device *mdd_device_free(const struct lu_env *env,
321 struct lu_device *lu)
323 struct mdd_device *m = lu2mdd_dev(lu);
324 struct lu_device *next = &m->mdd_child->dd_lu_dev;
327 LASSERT(atomic_read(&lu->ld_ref) == 0);
328 md_device_fini(&m->mdd_md_dev);
333 static struct obd_ops mdd_obd_device_ops = {
334 .o_owner = THIS_MODULE
337 /* context key constructor/destructor: mdd_ucred_key_init, mdd_ucred_key_fini */
338 LU_KEY_INIT_FINI(mdd_ucred, struct md_ucred);
340 static struct lu_context_key mdd_ucred_key = {
341 .lct_tags = LCT_SESSION,
342 .lct_init = mdd_ucred_key_init,
343 .lct_fini = mdd_ucred_key_fini
346 struct md_ucred *md_ucred(const struct lu_env *env)
348 LASSERT(env->le_ses != NULL);
349 return lu_context_key_get(env->le_ses, &mdd_ucred_key);
351 EXPORT_SYMBOL(md_ucred);
354 * context key constructor/destructor:
355 * mdd_capainfo_key_init, mdd_capainfo_key_fini
357 LU_KEY_INIT_FINI(mdd_capainfo, struct md_capainfo);
359 struct lu_context_key mdd_capainfo_key = {
360 .lct_tags = LCT_SESSION,
361 .lct_init = mdd_capainfo_key_init,
362 .lct_fini = mdd_capainfo_key_fini
365 struct md_capainfo *md_capainfo(const struct lu_env *env)
367 /* NB, in mdt_init0 */
368 if (env->le_ses == NULL)
370 return lu_context_key_get(env->le_ses, &mdd_capainfo_key);
372 EXPORT_SYMBOL(md_capainfo);
374 /* type constructor/destructor: mdd_type_init, mdd_type_fini */
375 LU_TYPE_INIT_FINI(mdd, &mdd_thread_key, &mdd_ucred_key, &mdd_capainfo_key);
377 struct md_device_operations mdd_ops = {
378 .mdo_statfs = mdd_statfs,
379 .mdo_root_get = mdd_root_get,
380 .mdo_maxsize_get = mdd_maxsize_get,
381 .mdo_init_capa_ctxt = mdd_init_capa_ctxt,
382 .mdo_update_capa_key= mdd_update_capa_key,
385 static struct lu_device_type_operations mdd_device_type_ops = {
386 .ldto_init = mdd_type_init,
387 .ldto_fini = mdd_type_fini,
389 .ldto_device_alloc = mdd_device_alloc,
390 .ldto_device_free = mdd_device_free,
392 .ldto_device_init = mdd_device_init,
393 .ldto_device_fini = mdd_device_fini
396 static struct lu_device_type mdd_device_type = {
397 .ldt_tags = LU_DEVICE_MD,
398 .ldt_name = LUSTRE_MDD_NAME,
399 .ldt_ops = &mdd_device_type_ops,
400 .ldt_ctx_tags = LCT_MD_THREAD
403 /* context key constructor: mdd_key_init */
404 LU_KEY_INIT(mdd, struct mdd_thread_info);
406 static void mdd_key_fini(const struct lu_context *ctx,
407 struct lu_context_key *key, void *data)
409 struct mdd_thread_info *info = data;
410 if (info->mti_max_lmm != NULL)
411 OBD_FREE(info->mti_max_lmm, info->mti_max_lmm_size);
412 if (info->mti_max_cookie != NULL)
413 OBD_FREE(info->mti_max_cookie, info->mti_max_cookie_size);
417 /* context key: mdd_thread_key */
418 LU_CONTEXT_KEY_DEFINE(mdd, LCT_MD_THREAD);
420 static int __init mdd_mod_init(void)
422 struct lprocfs_static_vars lvars;
423 lprocfs_mdd_init_vars(&lvars);
424 return class_register_type(&mdd_obd_device_ops, NULL, lvars.module_vars,
425 LUSTRE_MDD_NAME, &mdd_device_type);
428 static void __exit mdd_mod_exit(void)
430 class_unregister_type(LUSTRE_MDD_NAME);
433 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
434 MODULE_DESCRIPTION("Lustre Meta-data Device Prototype ("LUSTRE_MDD_NAME")");
435 MODULE_LICENSE("GPL");
437 cfs_module(mdd, "0.1.0", mdd_mod_init, mdd_mod_exit);