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 <linux/ldiskfs_fs.h>
57 #include <lustre_mds.h>
58 #include <lustre/lustre_idl.h>
60 #include "mdd_internal.h"
62 struct md_device_operations mdd_ops;
64 static const char *mdd_root_dir_name = "root";
65 static int mdd_device_init(const struct lu_env *env, struct lu_device *d,
66 const char *name, struct lu_device *next)
68 struct mdd_device *mdd = lu2mdd_dev(d);
72 mdd->mdd_child = lu2dt_dev(next);
74 /* Prepare transactions callbacks. */
75 mdd->mdd_txn_cb.dtc_txn_start = mdd_txn_start_cb;
76 mdd->mdd_txn_cb.dtc_txn_stop = mdd_txn_stop_cb;
77 mdd->mdd_txn_cb.dtc_txn_commit = mdd_txn_commit_cb;
78 mdd->mdd_txn_cb.dtc_cookie = mdd;
79 CFS_INIT_LIST_HEAD(&mdd->mdd_txn_cb.dtc_linkage);
80 mdd->mdd_atime_diff = MAX_ATIME_DIFF;
82 rc = mdd_procfs_init(mdd, name);
86 static struct lu_device *mdd_device_fini(const struct lu_env *env,
89 struct mdd_device *mdd = lu2mdd_dev(d);
90 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
93 rc = mdd_procfs_fini(mdd);
95 CERROR("proc fini error %d \n", rc);
101 static int mdd_mount(const struct lu_env *env, struct mdd_device *mdd)
104 struct dt_object *root;
107 dt_txn_callback_add(mdd->mdd_child, &mdd->mdd_txn_cb);
108 root = dt_store_open(env, mdd->mdd_child, mdd_root_dir_name,
111 LASSERT(root != NULL);
112 lu_object_put(env, &root->do_lu);
113 rc = orph_index_init(env, mdd);
120 static void mdd_device_shutdown(const struct lu_env *env,
121 struct mdd_device *m, struct lustre_cfg *cfg)
124 dt_txn_callback_del(m->mdd_child, &m->mdd_txn_cb);
126 mdd_fini_obd(env, m, cfg);
127 orph_index_fini(env, m);
128 /* remove upcall device*/
129 md_upcall_fini(&m->mdd_md_dev);
133 static int mdd_process_config(const struct lu_env *env,
134 struct lu_device *d, struct lustre_cfg *cfg)
136 struct mdd_device *m = lu2mdd_dev(d);
137 struct dt_device *dt = m->mdd_child;
138 struct lu_device *next = &dt->dd_lu_dev;
142 switch (cfg->lcfg_command) {
144 rc = next->ld_ops->ldo_process_config(env, next, cfg);
147 dt->dd_ops->dt_conf_get(env, dt, &m->mdd_dt_conf);
149 rc = mdd_init_obd(env, m, cfg);
151 CERROR("lov init error %d \n", rc);
154 rc = mdd_mount(env, m);
157 rc = mdd_txn_init_credits(env, m);
160 mdd_device_shutdown(env, m, cfg);
162 rc = next->ld_ops->ldo_process_config(env, next, cfg);
169 static int mdd_lov_set_nextid(const struct lu_env *env,
170 struct mdd_device *mdd)
172 struct mds_obd *mds = &mdd->mdd_obd_dev->u.mds;
176 LASSERT(mds->mds_lov_objids != NULL);
177 rc = obd_set_info_async(mds->mds_osc_exp, strlen(KEY_NEXT_ID),
178 KEY_NEXT_ID, mds->mds_lov_desc.ld_tgt_count,
179 mds->mds_lov_objids, NULL);
184 static int mdd_cleanup_unlink_llog(const struct lu_env *env,
185 struct mdd_device *mdd)
187 /* XXX: to be implemented! */
192 static int mdd_recovery_complete(const struct lu_env *env,
195 struct mdd_device *mdd = lu2mdd_dev(d);
196 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
197 struct obd_device *obd = mdd2obd_dev(mdd);
201 LASSERT(mdd != NULL);
202 LASSERT(obd != NULL);
204 /* XXX: Do we need this in new stack? */
205 rc = mdd_lov_set_nextid(env, mdd);
207 CERROR("mdd_lov_set_nextid() failed %d\n",
212 /* XXX: cleanup unlink. */
213 rc = mdd_cleanup_unlink_llog(env, mdd);
215 CERROR("mdd_cleanup_unlink_llog() failed %d\n",
220 /* Call that with obd_recovering = 1 just to update objids */
221 obd_notify(obd->u.mds.mds_osc_obd, NULL, (obd->obd_async_recov ?
222 OBD_NOTIFY_SYNC_NONBLOCK : OBD_NOTIFY_SYNC), NULL);
224 /* Drop obd_recovering to 0 and call o_postrecov to recover mds_lov */
225 obd->obd_recovering = 0;
226 obd->obd_type->typ_dt_ops->o_postrecov(obd);
228 /* XXX: orphans handling. */
229 __mdd_orphan_cleanup(env, mdd);
230 rc = next->ld_ops->ldo_recovery_complete(env, next);
235 struct lu_device_operations mdd_lu_ops = {
236 .ldo_object_alloc = mdd_object_alloc,
237 .ldo_process_config = mdd_process_config,
238 .ldo_recovery_complete = mdd_recovery_complete
242 * No permission check is needed.
244 static int mdd_root_get(const struct lu_env *env,
245 struct md_device *m, struct lu_fid *f)
247 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
250 *f = mdd->mdd_root_fid;
255 * No permission check is needed.
257 static int mdd_statfs(const struct lu_env *env, struct md_device *m,
260 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
265 rc = mdd_child_ops(mdd)->dt_statfs(env, mdd->mdd_child, sfs);
271 * No permission check is needed.
273 static int mdd_maxsize_get(const struct lu_env *env, struct md_device *m,
274 int *md_size, int *cookie_size)
276 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
279 *md_size = mdd_lov_mdsize(env, mdd);
280 *cookie_size = mdd_lov_cookiesize(env, mdd);
285 static int mdd_init_capa_ctxt(const struct lu_env *env, struct md_device *m,
286 int mode, unsigned long timeout, __u32 alg,
287 struct lustre_capa_key *keys)
289 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
290 struct mds_obd *mds = &mdd2obd_dev(mdd)->u.mds;
294 mds->mds_capa_keys = keys;
295 rc = mdd_child_ops(mdd)->dt_init_capa_ctxt(env, mdd->mdd_child, mode,
300 static int mdd_update_capa_key(const struct lu_env *env,
302 struct lustre_capa_key *key)
304 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
305 struct obd_export *lov_exp = mdd2obd_dev(mdd)->u.mds.mds_osc_exp;
309 rc = obd_set_info_async(lov_exp, sizeof(KEY_CAPA_KEY), KEY_CAPA_KEY,
310 sizeof(*key), key, NULL);
314 static struct lu_device *mdd_device_alloc(const struct lu_env *env,
315 struct lu_device_type *t,
316 struct lustre_cfg *lcfg)
319 struct mdd_device *m;
323 l = ERR_PTR(-ENOMEM);
325 md_device_init(&m->mdd_md_dev, t);
327 l->ld_ops = &mdd_lu_ops;
328 m->mdd_md_dev.md_ops = &mdd_ops;
329 md_upcall_init(&m->mdd_md_dev, NULL);
335 static struct lu_device *mdd_device_free(const struct lu_env *env,
336 struct lu_device *lu)
338 struct mdd_device *m = lu2mdd_dev(lu);
339 struct lu_device *next = &m->mdd_child->dd_lu_dev;
342 LASSERT(atomic_read(&lu->ld_ref) == 0);
343 md_device_fini(&m->mdd_md_dev);
348 static struct obd_ops mdd_obd_device_ops = {
349 .o_owner = THIS_MODULE
352 /* context key constructor/destructor: mdd_ucred_key_init, mdd_ucred_key_fini */
353 LU_KEY_INIT_FINI(mdd_ucred, struct md_ucred);
355 static struct lu_context_key mdd_ucred_key = {
356 .lct_tags = LCT_SESSION,
357 .lct_init = mdd_ucred_key_init,
358 .lct_fini = mdd_ucred_key_fini
361 struct md_ucred *md_ucred(const struct lu_env *env)
363 LASSERT(env->le_ses != NULL);
364 return lu_context_key_get(env->le_ses, &mdd_ucred_key);
366 EXPORT_SYMBOL(md_ucred);
369 * context key constructor/destructor:
370 * mdd_capainfo_key_init, mdd_capainfo_key_fini
372 LU_KEY_INIT_FINI(mdd_capainfo, struct md_capainfo);
374 struct lu_context_key mdd_capainfo_key = {
375 .lct_tags = LCT_SESSION,
376 .lct_init = mdd_capainfo_key_init,
377 .lct_fini = mdd_capainfo_key_fini
380 struct md_capainfo *md_capainfo(const struct lu_env *env)
382 /* NB, in mdt_init0 */
383 if (env->le_ses == NULL)
385 return lu_context_key_get(env->le_ses, &mdd_capainfo_key);
387 EXPORT_SYMBOL(md_capainfo);
389 /* type constructor/destructor: mdd_type_init, mdd_type_fini */
390 LU_TYPE_INIT_FINI(mdd, &mdd_thread_key, &mdd_ucred_key, &mdd_capainfo_key);
392 struct md_device_operations mdd_ops = {
393 .mdo_statfs = mdd_statfs,
394 .mdo_root_get = mdd_root_get,
395 .mdo_maxsize_get = mdd_maxsize_get,
396 .mdo_init_capa_ctxt = mdd_init_capa_ctxt,
397 .mdo_update_capa_key= mdd_update_capa_key,
400 static struct lu_device_type_operations mdd_device_type_ops = {
401 .ldto_init = mdd_type_init,
402 .ldto_fini = mdd_type_fini,
404 .ldto_device_alloc = mdd_device_alloc,
405 .ldto_device_free = mdd_device_free,
407 .ldto_device_init = mdd_device_init,
408 .ldto_device_fini = mdd_device_fini
411 static struct lu_device_type mdd_device_type = {
412 .ldt_tags = LU_DEVICE_MD,
413 .ldt_name = LUSTRE_MDD_NAME,
414 .ldt_ops = &mdd_device_type_ops,
415 .ldt_ctx_tags = LCT_MD_THREAD
418 /* context key constructor: mdd_key_init */
419 LU_KEY_INIT(mdd, struct mdd_thread_info);
421 static void mdd_key_fini(const struct lu_context *ctx,
422 struct lu_context_key *key, void *data)
424 struct mdd_thread_info *info = data;
425 if (info->mti_max_lmm != NULL)
426 OBD_FREE(info->mti_max_lmm, info->mti_max_lmm_size);
427 if (info->mti_max_cookie != NULL)
428 OBD_FREE(info->mti_max_cookie, info->mti_max_cookie_size);
432 /* context key: mdd_thread_key */
433 LU_CONTEXT_KEY_DEFINE(mdd, LCT_MD_THREAD);
435 static int __init mdd_mod_init(void)
437 struct lprocfs_static_vars lvars;
438 lprocfs_mdd_init_vars(&lvars);
439 return class_register_type(&mdd_obd_device_ops, NULL, lvars.module_vars,
440 LUSTRE_MDD_NAME, &mdd_device_type);
443 static void __exit mdd_mod_exit(void)
445 class_unregister_type(LUSTRE_MDD_NAME);
448 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
449 MODULE_DESCRIPTION("Lustre Meta-data Device Prototype ("LUSTRE_MDD_NAME")");
450 MODULE_LICENSE("GPL");
452 cfs_module(mdd, "0.1.0", mdd_mod_init, mdd_mod_exit);