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/mdd/mdd_device.c
38 * Lustre Metadata Server (mdd) routines
40 * Author: Wang Di <wangdi@clusterfs.com>
44 # define EXPORT_SYMTAB
46 #define DEBUG_SUBSYSTEM S_MDS
48 #include <linux/module.h>
49 #include <linux/jbd.h>
51 #include <obd_class.h>
52 #include <lustre_ver.h>
53 #include <obd_support.h>
54 #include <lprocfs_status.h>
56 #include <lustre_disk.h>
57 #include <lustre_fid.h>
58 #include <linux/ldiskfs_fs.h>
59 #include <lustre_mds.h>
60 #include <lustre/lustre_idl.h>
61 #include <lustre_param.h>
63 #include "mdd_internal.h"
65 const struct md_device_operations mdd_ops;
67 static const char mdd_root_dir_name[] = "ROOT";
69 static int mdd_device_init(const struct lu_env *env, struct lu_device *d,
70 const char *name, struct lu_device *next)
72 struct mdd_device *mdd = lu2mdd_dev(d);
76 mdd->mdd_child = lu2dt_dev(next);
78 /* Prepare transactions callbacks. */
79 mdd->mdd_txn_cb.dtc_txn_start = mdd_txn_start_cb;
80 mdd->mdd_txn_cb.dtc_txn_stop = mdd_txn_stop_cb;
81 mdd->mdd_txn_cb.dtc_txn_commit = mdd_txn_commit_cb;
82 mdd->mdd_txn_cb.dtc_cookie = mdd;
83 CFS_INIT_LIST_HEAD(&mdd->mdd_txn_cb.dtc_linkage);
84 mdd->mdd_atime_diff = MAX_ATIME_DIFF;
86 rc = mdd_procfs_init(mdd, name);
90 static struct lu_device *mdd_device_fini(const struct lu_env *env,
93 struct mdd_device *mdd = lu2mdd_dev(d);
94 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
97 rc = mdd_procfs_fini(mdd);
99 CERROR("proc fini error %d \n", rc);
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 struct lprocfs_static_vars lvars;
131 lprocfs_mdd_init_vars(&lvars);
132 rc = class_process_proc_param(PARAM_MDD, lvars.obd_vars, cfg,m);
133 if (rc > 0 || rc == -ENOSYS)
134 /* we don't understand; pass it on */
135 rc = next->ld_ops->ldo_process_config(env, next, cfg);
139 rc = next->ld_ops->ldo_process_config(env, next, cfg);
142 dt->dd_ops->dt_conf_get(env, dt, &m->mdd_dt_conf);
144 rc = mdd_init_obd(env, m, cfg);
146 CERROR("lov init error %d \n", rc);
149 rc = mdd_txn_init_credits(env, m);
152 mdd_device_shutdown(env, m, cfg);
154 rc = next->ld_ops->ldo_process_config(env, next, cfg);
161 static int mdd_lov_set_nextid(const struct lu_env *env,
162 struct mdd_device *mdd)
164 struct mds_obd *mds = &mdd->mdd_obd_dev->u.mds;
168 LASSERT(mds->mds_lov_objids != NULL);
169 rc = obd_set_info_async(mds->mds_osc_exp, strlen(KEY_NEXT_ID),
170 KEY_NEXT_ID, mds->mds_lov_desc.ld_tgt_count,
171 mds->mds_lov_objids, NULL);
176 static int mdd_cleanup_unlink_llog(const struct lu_env *env,
177 struct mdd_device *mdd)
179 /* XXX: to be implemented! */
184 static int mdd_recovery_complete(const struct lu_env *env,
187 struct mdd_device *mdd = lu2mdd_dev(d);
188 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
189 struct obd_device *obd = mdd2obd_dev(mdd);
193 LASSERT(mdd != NULL);
194 LASSERT(obd != NULL);
196 /* XXX: Do we need this in new stack? */
197 rc = mdd_lov_set_nextid(env, mdd);
199 CERROR("mdd_lov_set_nextid() failed %d\n",
204 /* XXX: cleanup unlink. */
205 rc = mdd_cleanup_unlink_llog(env, mdd);
207 CERROR("mdd_cleanup_unlink_llog() failed %d\n",
212 /* Call that with obd_recovering = 1 just to update objids */
213 obd_notify(obd->u.mds.mds_osc_obd, NULL, (obd->obd_async_recov ?
214 OBD_NOTIFY_SYNC_NONBLOCK : OBD_NOTIFY_SYNC), NULL);
216 /* Drop obd_recovering to 0 and call o_postrecov to recover mds_lov */
217 obd->obd_recovering = 0;
218 obd->obd_type->typ_dt_ops->o_postrecov(obd);
220 /* XXX: orphans handling. */
221 __mdd_orphan_cleanup(env, mdd);
222 rc = next->ld_ops->ldo_recovery_complete(env, next);
227 static int mdd_prepare(const struct lu_env *env,
228 struct lu_device *pdev,
229 struct lu_device *cdev)
231 struct mdd_device *mdd = lu2mdd_dev(cdev);
232 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
233 struct dt_object *root;
237 rc = next->ld_ops->ldo_prepare(env, cdev, next);
241 dt_txn_callback_add(mdd->mdd_child, &mdd->mdd_txn_cb);
242 root = dt_store_open(env, mdd->mdd_child, "", mdd_root_dir_name,
245 LASSERT(root != NULL);
246 lu_object_put(env, &root->do_lu);
247 rc = orph_index_init(env, mdd);
255 const struct lu_device_operations mdd_lu_ops = {
256 .ldo_object_alloc = mdd_object_alloc,
257 .ldo_process_config = mdd_process_config,
258 .ldo_recovery_complete = mdd_recovery_complete,
259 .ldo_prepare = mdd_prepare,
263 * No permission check is needed.
265 static int mdd_root_get(const struct lu_env *env,
266 struct md_device *m, struct lu_fid *f)
268 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
271 *f = mdd->mdd_root_fid;
276 * No permission check is needed.
278 static int mdd_statfs(const struct lu_env *env, struct md_device *m,
281 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
286 rc = mdd_child_ops(mdd)->dt_statfs(env, mdd->mdd_child, sfs);
292 * No permission check is needed.
294 static int mdd_maxsize_get(const struct lu_env *env, struct md_device *m,
295 int *md_size, int *cookie_size)
297 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
300 *md_size = mdd_lov_mdsize(env, mdd);
301 *cookie_size = mdd_lov_cookiesize(env, mdd);
306 static int mdd_init_capa_ctxt(const struct lu_env *env, struct md_device *m,
307 int mode, unsigned long timeout, __u32 alg,
308 struct lustre_capa_key *keys)
310 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
311 struct mds_obd *mds = &mdd2obd_dev(mdd)->u.mds;
315 mds->mds_capa_keys = keys;
316 rc = mdd_child_ops(mdd)->dt_init_capa_ctxt(env, mdd->mdd_child, mode,
321 static int mdd_update_capa_key(const struct lu_env *env,
323 struct lustre_capa_key *key)
325 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
326 struct obd_export *lov_exp = mdd2obd_dev(mdd)->u.mds.mds_osc_exp;
330 rc = obd_set_info_async(lov_exp, sizeof(KEY_CAPA_KEY), KEY_CAPA_KEY,
331 sizeof(*key), key, NULL);
335 static struct lu_device *mdd_device_alloc(const struct lu_env *env,
336 struct lu_device_type *t,
337 struct lustre_cfg *lcfg)
340 struct mdd_device *m;
344 l = ERR_PTR(-ENOMEM);
346 md_device_init(&m->mdd_md_dev, t);
348 l->ld_ops = &mdd_lu_ops;
349 m->mdd_md_dev.md_ops = &mdd_ops;
350 md_upcall_init(&m->mdd_md_dev, NULL);
356 static struct lu_device *mdd_device_free(const struct lu_env *env,
357 struct lu_device *lu)
359 struct mdd_device *m = lu2mdd_dev(lu);
360 struct lu_device *next = &m->mdd_child->dd_lu_dev;
363 LASSERT(atomic_read(&lu->ld_ref) == 0);
364 md_device_fini(&m->mdd_md_dev);
369 static struct obd_ops mdd_obd_device_ops = {
370 .o_owner = THIS_MODULE
373 /* context key constructor/destructor: mdd_ucred_key_init, mdd_ucred_key_fini */
374 LU_KEY_INIT_FINI(mdd_ucred, struct md_ucred);
376 static struct lu_context_key mdd_ucred_key = {
377 .lct_tags = LCT_SESSION,
378 .lct_init = mdd_ucred_key_init,
379 .lct_fini = mdd_ucred_key_fini
382 struct md_ucred *md_ucred(const struct lu_env *env)
384 LASSERT(env->le_ses != NULL);
385 return lu_context_key_get(env->le_ses, &mdd_ucred_key);
387 EXPORT_SYMBOL(md_ucred);
390 * context key constructor/destructor:
391 * mdd_capainfo_key_init, mdd_capainfo_key_fini
393 LU_KEY_INIT_FINI(mdd_capainfo, struct md_capainfo);
395 struct lu_context_key mdd_capainfo_key = {
396 .lct_tags = LCT_SESSION,
397 .lct_init = mdd_capainfo_key_init,
398 .lct_fini = mdd_capainfo_key_fini
401 struct md_capainfo *md_capainfo(const struct lu_env *env)
403 /* NB, in mdt_init0 */
404 if (env->le_ses == NULL)
406 return lu_context_key_get(env->le_ses, &mdd_capainfo_key);
408 EXPORT_SYMBOL(md_capainfo);
410 /* type constructor/destructor: mdd_type_init, mdd_type_fini */
411 LU_TYPE_INIT_FINI(mdd, &mdd_thread_key, &mdd_ucred_key, &mdd_capainfo_key);
413 const struct md_device_operations mdd_ops = {
414 .mdo_statfs = mdd_statfs,
415 .mdo_root_get = mdd_root_get,
416 .mdo_maxsize_get = mdd_maxsize_get,
417 .mdo_init_capa_ctxt = mdd_init_capa_ctxt,
418 .mdo_update_capa_key= mdd_update_capa_key,
419 #ifdef HAVE_QUOTA_SUPPORT
421 .mqo_notify = mdd_quota_notify,
422 .mqo_setup = mdd_quota_setup,
423 .mqo_cleanup = mdd_quota_cleanup,
424 .mqo_recovery = mdd_quota_recovery,
425 .mqo_check = mdd_quota_check,
426 .mqo_on = mdd_quota_on,
427 .mqo_off = mdd_quota_off,
428 .mqo_setinfo = mdd_quota_setinfo,
429 .mqo_getinfo = mdd_quota_getinfo,
430 .mqo_setquota = mdd_quota_setquota,
431 .mqo_getquota = mdd_quota_getquota,
432 .mqo_getoinfo = mdd_quota_getoinfo,
433 .mqo_getoquota = mdd_quota_getoquota,
434 .mqo_invalidate = mdd_quota_invalidate,
435 .mqo_finvalidate = mdd_quota_finvalidate
440 static struct lu_device_type_operations mdd_device_type_ops = {
441 .ldto_init = mdd_type_init,
442 .ldto_fini = mdd_type_fini,
444 .ldto_start = mdd_type_start,
445 .ldto_stop = mdd_type_stop,
447 .ldto_device_alloc = mdd_device_alloc,
448 .ldto_device_free = mdd_device_free,
450 .ldto_device_init = mdd_device_init,
451 .ldto_device_fini = mdd_device_fini
454 static struct lu_device_type mdd_device_type = {
455 .ldt_tags = LU_DEVICE_MD,
456 .ldt_name = LUSTRE_MDD_NAME,
457 .ldt_ops = &mdd_device_type_ops,
458 .ldt_ctx_tags = LCT_MD_THREAD
461 /* context key constructor: mdd_key_init */
462 LU_KEY_INIT(mdd, struct mdd_thread_info);
464 static void mdd_key_fini(const struct lu_context *ctx,
465 struct lu_context_key *key, void *data)
467 struct mdd_thread_info *info = data;
468 if (info->mti_max_lmm != NULL)
469 OBD_FREE(info->mti_max_lmm, info->mti_max_lmm_size);
470 if (info->mti_max_cookie != NULL)
471 OBD_FREE(info->mti_max_cookie, info->mti_max_cookie_size);
475 /* context key: mdd_thread_key */
476 LU_CONTEXT_KEY_DEFINE(mdd, LCT_MD_THREAD);
478 static struct lu_local_obj_desc llod_capa_key = {
479 .llod_name = CAPA_KEYS,
480 .llod_oid = MDD_CAPA_KEYS_OID,
484 static struct lu_local_obj_desc llod_mdd_orphan = {
485 .llod_name = orph_index_name,
486 .llod_oid = MDD_ORPHAN_OID,
488 .llod_feat = &dt_directory_features,
491 static struct lu_local_obj_desc llod_mdd_root = {
492 .llod_name = mdd_root_dir_name,
493 .llod_oid = MDD_ROOT_INDEX_OID,
495 .llod_feat = &dt_directory_features,
498 static int __init mdd_mod_init(void)
500 struct lprocfs_static_vars lvars;
501 lprocfs_mdd_init_vars(&lvars);
503 llo_local_obj_register(&llod_capa_key);
504 llo_local_obj_register(&llod_mdd_orphan);
505 llo_local_obj_register(&llod_mdd_root);
507 return class_register_type(&mdd_obd_device_ops, NULL, lvars.module_vars,
508 LUSTRE_MDD_NAME, &mdd_device_type);
511 static void __exit mdd_mod_exit(void)
513 llo_local_obj_unregister(&llod_capa_key);
514 llo_local_obj_unregister(&llod_mdd_orphan);
515 llo_local_obj_unregister(&llod_mdd_root);
517 class_unregister_type(LUSTRE_MDD_NAME);
520 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
521 MODULE_DESCRIPTION("Lustre Meta-data Device Prototype ("LUSTRE_MDD_NAME")");
522 MODULE_LICENSE("GPL");
524 cfs_module(mdd, "0.1.0", mdd_mod_init, mdd_mod_exit);