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 #ifdef HAVE_EXT4_LDISKFS
50 #include <ldiskfs/ldiskfs_jbd2.h>
52 #include <linux/jbd.h>
55 #include <obd_class.h>
56 #include <lustre_ver.h>
57 #include <obd_support.h>
58 #include <lprocfs_status.h>
60 #include <lustre_disk.h>
61 #include <lustre_fid.h>
62 #ifdef HAVE_EXT4_LDISKFS
63 #include <ldiskfs/ldiskfs.h>
65 #include <linux/ldiskfs_fs.h>
67 #include <lustre_mds.h>
68 #include <lustre/lustre_idl.h>
69 #include <lustre_disk.h> /* for changelogs */
70 #include <lustre_param.h>
71 #include <lustre_fid.h>
73 #include "mdd_internal.h"
75 const struct md_device_operations mdd_ops;
76 static struct lu_device_type mdd_device_type;
78 static const char mdd_root_dir_name[] = "ROOT";
79 static const char mdd_obf_dir_name[] = "fid";
81 static int mdd_device_init(const struct lu_env *env, struct lu_device *d,
82 const char *name, struct lu_device *next)
84 struct mdd_device *mdd = lu2mdd_dev(d);
88 mdd->mdd_child = lu2dt_dev(next);
90 /* Prepare transactions callbacks. */
91 mdd->mdd_txn_cb.dtc_txn_start = mdd_txn_start_cb;
92 mdd->mdd_txn_cb.dtc_txn_stop = mdd_txn_stop_cb;
93 mdd->mdd_txn_cb.dtc_txn_commit = mdd_txn_commit_cb;
94 mdd->mdd_txn_cb.dtc_cookie = mdd;
95 mdd->mdd_txn_cb.dtc_tag = LCT_MD_THREAD;
96 CFS_INIT_LIST_HEAD(&mdd->mdd_txn_cb.dtc_linkage);
97 mdd->mdd_atime_diff = MAX_ATIME_DIFF;
99 rc = mdd_procfs_init(mdd, name);
103 static struct lu_device *mdd_device_fini(const struct lu_env *env,
106 struct mdd_device *mdd = lu2mdd_dev(d);
107 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
110 rc = mdd_procfs_fini(mdd);
112 CERROR("proc fini error %d \n", rc);
118 static void mdd_changelog_fini(const struct lu_env *env,
119 struct mdd_device *mdd);
121 static void mdd_device_shutdown(const struct lu_env *env,
122 struct mdd_device *m, struct lustre_cfg *cfg)
125 mdd_changelog_fini(env, m);
126 dt_txn_callback_del(m->mdd_child, &m->mdd_txn_cb);
127 if (m->mdd_dot_lustre_objs.mdd_obf)
128 mdd_object_put(env, m->mdd_dot_lustre_objs.mdd_obf);
129 if (m->mdd_dot_lustre)
130 mdd_object_put(env, m->mdd_dot_lustre);
132 mdd_fini_obd(env, m, cfg);
133 orph_index_fini(env, m);
134 /* remove upcall device*/
135 md_upcall_fini(&m->mdd_md_dev);
139 static int changelog_init_cb(struct llog_handle *llh, struct llog_rec_hdr *hdr,
142 struct mdd_device *mdd = (struct mdd_device *)data;
143 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
146 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
147 LASSERT(rec->cr_hdr.lrh_type == CHANGELOG_REC);
150 "seeing record at index %d/%d/"LPU64" t=%x %.*s in log "LPX64"\n",
151 hdr->lrh_index, rec->cr_hdr.lrh_index, rec->cr.cr_index,
152 rec->cr.cr_type, rec->cr.cr_namelen, rec->cr.cr_name,
153 llh->lgh_id.lgl_oid);
155 mdd->mdd_cl.mc_index = rec->cr.cr_index;
156 RETURN(LLOG_PROC_BREAK);
159 static int changelog_user_init_cb(struct llog_handle *llh,
160 struct llog_rec_hdr *hdr, void *data)
162 struct mdd_device *mdd = (struct mdd_device *)data;
163 struct llog_changelog_user_rec *rec =
164 (struct llog_changelog_user_rec *)hdr;
167 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
168 LASSERT(rec->cur_hdr.lrh_type == CHANGELOG_USER_REC);
170 CDEBUG(D_INFO, "seeing user at index %d/%d id=%d endrec="LPU64
171 " in log "LPX64"\n", hdr->lrh_index, rec->cur_hdr.lrh_index,
172 rec->cur_id, rec->cur_endrec, llh->lgh_id.lgl_oid);
174 spin_lock(&mdd->mdd_cl.mc_user_lock);
175 mdd->mdd_cl.mc_lastuser = rec->cur_id;
176 spin_unlock(&mdd->mdd_cl.mc_user_lock);
178 RETURN(LLOG_PROC_BREAK);
182 static int mdd_changelog_llog_init(struct mdd_device *mdd)
184 struct obd_device *obd = mdd2obd_dev(mdd);
185 struct llog_ctxt *ctxt;
188 /* Find last changelog entry number */
189 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
191 CERROR("no changelog context\n");
194 if (!ctxt->loc_handle) {
199 rc = llog_cat_reverse_process(ctxt->loc_handle, changelog_init_cb, mdd);
203 CERROR("changelog init failed: %d\n", rc);
206 CDEBUG(D_IOCTL, "changelog starting index="LPU64"\n",
207 mdd->mdd_cl.mc_index);
209 /* Find last changelog user id */
210 ctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT);
212 CERROR("no changelog user context\n");
215 if (!ctxt->loc_handle) {
220 rc = llog_cat_reverse_process(ctxt->loc_handle, changelog_user_init_cb,
225 CERROR("changelog user init failed: %d\n", rc);
229 /* If we have registered users, assume we want changelogs on */
230 if (mdd->mdd_cl.mc_lastuser > 0)
231 rc = mdd_changelog_on(mdd, 1);
236 static int mdd_changelog_init(const struct lu_env *env, struct mdd_device *mdd)
240 mdd->mdd_cl.mc_index = 0;
241 spin_lock_init(&mdd->mdd_cl.mc_lock);
242 cfs_waitq_init(&mdd->mdd_cl.mc_waitq);
243 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
244 mdd->mdd_cl.mc_flags = 0; /* off by default */
245 mdd->mdd_cl.mc_mask = CHANGELOG_DEFMASK;
246 spin_lock_init(&mdd->mdd_cl.mc_user_lock);
247 mdd->mdd_cl.mc_lastuser = 0;
249 rc = mdd_changelog_llog_init(mdd);
251 CERROR("Changelog setup during init failed %d\n", rc);
252 mdd->mdd_cl.mc_flags |= CLM_ERR;
258 static void mdd_changelog_fini(const struct lu_env *env, struct mdd_device *mdd)
260 mdd->mdd_cl.mc_flags = 0;
263 /* Start / stop recording */
264 int mdd_changelog_on(struct mdd_device *mdd, int on)
268 if ((on == 1) && ((mdd->mdd_cl.mc_flags & CLM_ON) == 0)) {
269 LCONSOLE_INFO("%s: changelog on\n", mdd2obd_dev(mdd)->obd_name);
270 if (mdd->mdd_cl.mc_flags & CLM_ERR) {
271 CERROR("Changelogs cannot be enabled due to error "
272 "condition (see %s log).\n",
273 mdd2obd_dev(mdd)->obd_name);
276 spin_lock(&mdd->mdd_cl.mc_lock);
277 mdd->mdd_cl.mc_flags |= CLM_ON;
278 spin_unlock(&mdd->mdd_cl.mc_lock);
279 rc = mdd_changelog_write_header(mdd, CLM_START);
281 } else if ((on == 0) && ((mdd->mdd_cl.mc_flags & CLM_ON) == CLM_ON)) {
282 LCONSOLE_INFO("%s: changelog off\n",mdd2obd_dev(mdd)->obd_name);
283 rc = mdd_changelog_write_header(mdd, CLM_FINI);
284 spin_lock(&mdd->mdd_cl.mc_lock);
285 mdd->mdd_cl.mc_flags &= ~CLM_ON;
286 spin_unlock(&mdd->mdd_cl.mc_lock);
291 /** Add a changelog entry \a rec to the changelog llog
294 * \param handle - currently ignored since llogs start their own transaction;
295 * this will hopefully be fixed in llog rewrite
298 int mdd_changelog_llog_write(struct mdd_device *mdd,
299 struct llog_changelog_rec *rec,
300 struct thandle *handle)
302 struct obd_device *obd = mdd2obd_dev(mdd);
303 struct llog_ctxt *ctxt;
306 if ((mdd->mdd_cl.mc_mask & (1 << rec->cr.cr_type)) == 0)
309 rec->cr_hdr.lrh_len = llog_data_len(sizeof(*rec) + rec->cr.cr_namelen);
310 /* llog_lvfs_write_rec sets the llog tail len */
311 rec->cr_hdr.lrh_type = CHANGELOG_REC;
312 rec->cr.cr_time = cfs_time_current_64();
313 spin_lock(&mdd->mdd_cl.mc_lock);
314 /* NB: I suppose it's possible llog_add adds out of order wrt cr_index,
315 but as long as the MDD transactions are ordered correctly for e.g.
316 rename conflicts, I don't think this should matter. */
317 rec->cr.cr_index = ++mdd->mdd_cl.mc_index;
318 spin_unlock(&mdd->mdd_cl.mc_lock);
319 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
323 /* nested journal transaction */
324 rc = llog_add(ctxt, &rec->cr_hdr, NULL, NULL, 0);
327 cfs_waitq_signal(&mdd->mdd_cl.mc_waitq);
332 /** Remove entries with indicies up to and including \a endrec from the
338 int mdd_changelog_llog_cancel(struct mdd_device *mdd, long long endrec)
340 struct obd_device *obd = mdd2obd_dev(mdd);
341 struct llog_ctxt *ctxt;
342 long long unsigned cur;
345 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
349 spin_lock(&mdd->mdd_cl.mc_lock);
350 cur = (long long)mdd->mdd_cl.mc_index;
351 spin_unlock(&mdd->mdd_cl.mc_lock);
355 /* purge to "0" is shorthand for everything */
359 /* If purging all records, write a header entry so we don't have an
360 empty catalog and we're sure to have a valid starting index next
361 time. In case of crash, we just restart with old log so we're
364 rc = mdd_changelog_write_header(mdd, CLM_PURGE);
369 /* Some records were purged, so reset repeat-access time (so we
370 record new mtime update records, so users can see a file has been
371 changed since the last purge) */
372 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
374 rc = llog_cancel(ctxt, NULL, 1, (struct llog_cookie *)&endrec, 0);
380 /** Add a CL_MARK record to the changelog
382 * \param markerflags - CLM_*
385 int mdd_changelog_write_header(struct mdd_device *mdd, int markerflags)
387 struct obd_device *obd = mdd2obd_dev(mdd);
388 struct llog_changelog_rec *rec;
390 int len = strlen(obd->obd_name);
394 reclen = llog_data_len(sizeof(*rec) + len);
395 OBD_ALLOC(rec, reclen);
399 rec->cr.cr_flags = CLF_VERSION;
400 rec->cr.cr_type = CL_MARK;
401 rec->cr.cr_namelen = len;
402 memcpy(rec->cr.cr_name, obd->obd_name, rec->cr.cr_namelen);
403 /* Status and action flags */
404 rec->cr.cr_markerflags = mdd->mdd_cl.mc_flags | markerflags;
406 rc = mdd_changelog_llog_write(mdd, rec, NULL);
408 /* assume on or off event; reset repeat-access time */
409 mdd->mdd_cl.mc_starttime = rec->cr.cr_time;
411 OBD_FREE(rec, reclen);
416 * Create ".lustre" directory.
418 static int create_dot_lustre_dir(const struct lu_env *env, struct mdd_device *m)
420 struct lu_fid *fid = &mdd_env_info(env)->mti_fid;
421 struct md_object *mdo;
424 memcpy(fid, &LU_DOT_LUSTRE_FID, sizeof(struct lu_fid));
425 mdo = llo_store_create_index(env, &m->mdd_md_dev, m->mdd_child,
426 mdd_root_dir_name, dot_lustre_name,
427 fid, &dt_directory_features);
428 /* .lustre dir may be already present */
429 if (IS_ERR(mdo) && PTR_ERR(mdo) != -EEXIST) {
431 CERROR("creating obj [%s] fid = "DFID" rc = %d\n",
432 dot_lustre_name, PFID(fid), rc);
437 lu_object_put(env, &mdo->mo_lu);
443 static int dot_lustre_mdd_permission(const struct lu_env *env,
444 struct md_object *pobj,
445 struct md_object *cobj,
446 struct md_attr *attr, int mask)
448 if (mask & ~(MAY_READ | MAY_EXEC))
454 static int dot_lustre_mdd_attr_get(const struct lu_env *env,
455 struct md_object *obj, struct md_attr *ma)
457 struct mdd_object *mdd_obj = md2mdd_obj(obj);
459 return mdd_attr_get_internal_locked(env, mdd_obj, ma);
462 static int dot_lustre_mdd_attr_set(const struct lu_env *env,
463 struct md_object *obj,
464 const struct md_attr *ma)
469 static int dot_lustre_mdd_xattr_get(const struct lu_env *env,
470 struct md_object *obj, struct lu_buf *buf,
476 static int dot_lustre_mdd_xattr_list(const struct lu_env *env,
477 struct md_object *obj, struct lu_buf *buf)
482 static int dot_lustre_mdd_xattr_set(const struct lu_env *env,
483 struct md_object *obj,
484 const struct lu_buf *buf, const char *name,
490 static int dot_lustre_mdd_xattr_del(const struct lu_env *env,
491 struct md_object *obj,
497 static int dot_lustre_mdd_readlink(const struct lu_env *env,
498 struct md_object *obj, struct lu_buf *buf)
503 static int dot_lustre_mdd_object_create(const struct lu_env *env,
504 struct md_object *obj,
505 const struct md_op_spec *spec,
511 static int dot_lustre_mdd_ref_add(const struct lu_env *env,
512 struct md_object *obj,
513 const struct md_attr *ma)
518 static int dot_lustre_mdd_ref_del(const struct lu_env *env,
519 struct md_object *obj,
525 static int dot_lustre_mdd_open(const struct lu_env *env, struct md_object *obj,
528 struct mdd_object *mdd_obj = md2mdd_obj(obj);
530 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
531 mdd_obj->mod_count++;
532 mdd_write_unlock(env, mdd_obj);
537 static int dot_lustre_mdd_close(const struct lu_env *env, struct md_object *obj,
540 struct mdd_object *mdd_obj = md2mdd_obj(obj);
542 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
543 mdd_obj->mod_count--;
544 mdd_write_unlock(env, mdd_obj);
549 static int dot_lustre_mdd_object_sync(const struct lu_env *env,
550 struct md_object *obj)
555 static dt_obj_version_t dot_lustre_mdd_version_get(const struct lu_env *env,
556 struct md_object *obj)
561 static void dot_lustre_mdd_version_set(const struct lu_env *env,
562 struct md_object *obj,
563 dt_obj_version_t version)
568 static int dot_lustre_mdd_path(const struct lu_env *env, struct md_object *obj,
569 char *path, int pathlen, __u64 *recno, int *linkno)
575 static struct md_object_operations mdd_dot_lustre_obj_ops = {
576 .moo_permission = dot_lustre_mdd_permission,
577 .moo_attr_get = dot_lustre_mdd_attr_get,
578 .moo_attr_set = dot_lustre_mdd_attr_set,
579 .moo_xattr_get = dot_lustre_mdd_xattr_get,
580 .moo_xattr_list = dot_lustre_mdd_xattr_list,
581 .moo_xattr_set = dot_lustre_mdd_xattr_set,
582 .moo_xattr_del = dot_lustre_mdd_xattr_del,
583 .moo_readpage = mdd_readpage,
584 .moo_readlink = dot_lustre_mdd_readlink,
585 .moo_object_create = dot_lustre_mdd_object_create,
586 .moo_ref_add = dot_lustre_mdd_ref_add,
587 .moo_ref_del = dot_lustre_mdd_ref_del,
588 .moo_open = dot_lustre_mdd_open,
589 .moo_close = dot_lustre_mdd_close,
590 .moo_capa_get = mdd_capa_get,
591 .moo_object_sync = dot_lustre_mdd_object_sync,
592 .moo_version_get = dot_lustre_mdd_version_get,
593 .moo_version_set = dot_lustre_mdd_version_set,
594 .moo_path = dot_lustre_mdd_path,
598 static int dot_lustre_mdd_lookup(const struct lu_env *env, struct md_object *p,
599 const struct lu_name *lname, struct lu_fid *f,
600 struct md_op_spec *spec)
602 if (strcmp(lname->ln_name, mdd_obf_dir_name) == 0)
610 static mdl_mode_t dot_lustre_mdd_lock_mode(const struct lu_env *env,
611 struct md_object *obj,
617 static int dot_lustre_mdd_create(const struct lu_env *env,
618 struct md_object *pobj,
619 const struct lu_name *lname,
620 struct md_object *child,
621 struct md_op_spec *spec,
627 static int dot_lustre_mdd_create_data(const struct lu_env *env,
630 const struct md_op_spec *spec,
636 static int dot_lustre_mdd_rename(const struct lu_env *env,
637 struct md_object *src_pobj,
638 struct md_object *tgt_pobj,
639 const struct lu_fid *lf,
640 const struct lu_name *lsname,
641 struct md_object *tobj,
642 const struct lu_name *ltname,
648 static int dot_lustre_mdd_link(const struct lu_env *env,
649 struct md_object *tgt_obj,
650 struct md_object *src_obj,
651 const struct lu_name *lname,
657 static int dot_lustre_mdd_unlink(const struct lu_env *env,
658 struct md_object *pobj,
659 struct md_object *cobj,
660 const struct lu_name *lname,
666 static int dot_lustre_mdd_name_insert(const struct lu_env *env,
667 struct md_object *obj,
668 const struct lu_name *lname,
669 const struct lu_fid *fid,
670 const struct md_attr *ma)
675 static int dot_lustre_mdd_name_remove(const struct lu_env *env,
676 struct md_object *obj,
677 const struct lu_name *lname,
678 const struct md_attr *ma)
683 static int dot_lustre_mdd_rename_tgt(const struct lu_env *env,
684 struct md_object *pobj,
685 struct md_object *tobj,
686 const struct lu_fid *fid,
687 const struct lu_name *lname,
694 static struct md_dir_operations mdd_dot_lustre_dir_ops = {
695 .mdo_is_subdir = mdd_is_subdir,
696 .mdo_lookup = dot_lustre_mdd_lookup,
697 .mdo_lock_mode = dot_lustre_mdd_lock_mode,
698 .mdo_create = dot_lustre_mdd_create,
699 .mdo_create_data = dot_lustre_mdd_create_data,
700 .mdo_rename = dot_lustre_mdd_rename,
701 .mdo_link = dot_lustre_mdd_link,
702 .mdo_unlink = dot_lustre_mdd_unlink,
703 .mdo_name_insert = dot_lustre_mdd_name_insert,
704 .mdo_name_remove = dot_lustre_mdd_name_remove,
705 .mdo_rename_tgt = dot_lustre_mdd_rename_tgt,
708 static int obf_attr_get(const struct lu_env *env, struct md_object *obj,
713 if (ma->ma_need & MA_INODE) {
714 struct mdd_device *mdd = mdo2mdd(obj);
716 /* "fid" is a virtual object and hence does not have any "real"
717 * attributes. So we reuse attributes of .lustre for "fid" dir */
718 ma->ma_need |= MA_INODE;
719 rc = dot_lustre_mdd_attr_get(env, &mdd->mdd_dot_lustre->mod_obj,
723 ma->ma_valid |= MA_INODE;
726 /* "fid" directory does not have any striping information. */
727 if (ma->ma_need & MA_LOV) {
728 struct mdd_object *mdd_obj = md2mdd_obj(obj);
730 if (ma->ma_valid & MA_LOV)
733 if (!(S_ISREG(mdd_object_type(mdd_obj)) ||
734 S_ISDIR(mdd_object_type(mdd_obj))))
737 if (ma->ma_need & MA_LOV_DEF) {
738 rc = mdd_get_default_md(mdd_obj, ma->ma_lmm,
741 ma->ma_valid |= MA_LOV;
750 static int obf_attr_set(const struct lu_env *env, struct md_object *obj,
751 const struct md_attr *ma)
756 static int obf_xattr_get(const struct lu_env *env,
757 struct md_object *obj, struct lu_buf *buf,
763 static int obf_mdd_open(const struct lu_env *env, struct md_object *obj,
766 struct mdd_object *mdd_obj = md2mdd_obj(obj);
768 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
769 mdd_obj->mod_count++;
770 mdd_write_unlock(env, mdd_obj);
775 static int obf_mdd_close(const struct lu_env *env, struct md_object *obj,
778 struct mdd_object *mdd_obj = md2mdd_obj(obj);
780 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
781 mdd_obj->mod_count--;
782 mdd_write_unlock(env, mdd_obj);
787 /** Nothing to list in "fid" directory */
788 static int obf_mdd_readpage(const struct lu_env *env, struct md_object *obj,
789 const struct lu_rdpg *rdpg)
794 static int obf_path(const struct lu_env *env, struct md_object *obj,
795 char *path, int pathlen, __u64 *recno, int *linkno)
800 static struct md_object_operations mdd_obf_obj_ops = {
801 .moo_attr_get = obf_attr_get,
802 .moo_attr_set = obf_attr_set,
803 .moo_xattr_get = obf_xattr_get,
804 .moo_open = obf_mdd_open,
805 .moo_close = obf_mdd_close,
806 .moo_readpage = obf_mdd_readpage,
811 * Lookup method for "fid" object. Only filenames with correct SEQ:OID format
812 * are valid. We also check if object with passed fid exists or not.
814 static int obf_lookup(const struct lu_env *env, struct md_object *p,
815 const struct lu_name *lname, struct lu_fid *f,
816 struct md_op_spec *spec)
818 char *name = (char *)lname->ln_name;
819 struct mdd_device *mdd = mdo2mdd(p);
820 struct mdd_object *child;
826 sscanf(name, SFID, RFID(f));
827 if (!fid_is_sane(f)) {
828 CWARN("bad FID format [%s], should be "DFID"\n", lname->ln_name,
830 GOTO(out, rc = -EINVAL);
833 /* Check if object with this fid exists */
834 child = mdd_object_find(env, mdd, f);
838 GOTO(out, rc = PTR_ERR(child));
840 if (mdd_object_exists(child) == 0)
843 mdd_object_put(env, child);
849 static int obf_create(const struct lu_env *env, struct md_object *pobj,
850 const struct lu_name *lname, struct md_object *child,
851 struct md_op_spec *spec, struct md_attr* ma)
856 static int obf_rename(const struct lu_env *env,
857 struct md_object *src_pobj, struct md_object *tgt_pobj,
858 const struct lu_fid *lf, const struct lu_name *lsname,
859 struct md_object *tobj, const struct lu_name *ltname,
865 static int obf_link(const struct lu_env *env, struct md_object *tgt_obj,
866 struct md_object *src_obj, const struct lu_name *lname,
872 static int obf_unlink(const struct lu_env *env, struct md_object *pobj,
873 struct md_object *cobj, const struct lu_name *lname,
879 static struct md_dir_operations mdd_obf_dir_ops = {
880 .mdo_lookup = obf_lookup,
881 .mdo_create = obf_create,
882 .mdo_rename = obf_rename,
883 .mdo_link = obf_link,
884 .mdo_unlink = obf_unlink
888 * Create special in-memory "fid" object for open-by-fid.
890 static int mdd_obf_setup(const struct lu_env *env, struct mdd_device *m)
892 struct mdd_object *mdd_obf;
893 struct lu_object *obf_lu_obj;
896 m->mdd_dot_lustre_objs.mdd_obf = mdd_object_find(env, m,
898 if (m->mdd_dot_lustre_objs.mdd_obf == NULL ||
899 IS_ERR(m->mdd_dot_lustre_objs.mdd_obf))
900 GOTO(out, rc = -ENOENT);
902 mdd_obf = m->mdd_dot_lustre_objs.mdd_obf;
903 mdd_obf->mod_obj.mo_dir_ops = &mdd_obf_dir_ops;
904 mdd_obf->mod_obj.mo_ops = &mdd_obf_obj_ops;
905 /* Don't allow objects to be created in "fid" dir */
906 mdd_obf->mod_flags |= IMMUTE_OBJ;
908 obf_lu_obj = mdd2lu_obj(mdd_obf);
909 obf_lu_obj->lo_header->loh_attr |= (LOHA_EXISTS | S_IFDIR);
915 /** Setup ".lustre" directory object */
916 static int mdd_dot_lustre_setup(const struct lu_env *env, struct mdd_device *m)
918 struct dt_object *dt_dot_lustre;
919 struct lu_fid *fid = &mdd_env_info(env)->mti_fid;
922 rc = create_dot_lustre_dir(env, m);
926 dt_dot_lustre = dt_store_open(env, m->mdd_child, mdd_root_dir_name,
927 dot_lustre_name, fid);
928 if (IS_ERR(dt_dot_lustre)) {
929 rc = PTR_ERR(dt_dot_lustre);
933 /* references are released in mdd_device_shutdown() */
934 m->mdd_dot_lustre = lu2mdd_obj(lu_object_locate(dt_dot_lustre->do_lu.lo_header,
937 m->mdd_dot_lustre->mod_obj.mo_dir_ops = &mdd_dot_lustre_dir_ops;
938 m->mdd_dot_lustre->mod_obj.mo_ops = &mdd_dot_lustre_obj_ops;
940 rc = mdd_obf_setup(env, m);
942 CERROR("Error initializing \"fid\" object - %d.\n", rc);
948 static int mdd_process_config(const struct lu_env *env,
949 struct lu_device *d, struct lustre_cfg *cfg)
951 struct mdd_device *m = lu2mdd_dev(d);
952 struct dt_device *dt = m->mdd_child;
953 struct lu_device *next = &dt->dd_lu_dev;
957 switch (cfg->lcfg_command) {
959 struct lprocfs_static_vars lvars;
961 lprocfs_mdd_init_vars(&lvars);
962 rc = class_process_proc_param(PARAM_MDD, lvars.obd_vars, cfg,m);
963 if (rc > 0 || rc == -ENOSYS)
964 /* we don't understand; pass it on */
965 rc = next->ld_ops->ldo_process_config(env, next, cfg);
969 rc = next->ld_ops->ldo_process_config(env, next, cfg);
972 dt->dd_ops->dt_conf_get(env, dt, &m->mdd_dt_conf);
974 rc = mdd_init_obd(env, m, cfg);
976 CERROR("lov init error %d \n", rc);
979 rc = mdd_txn_init_credits(env, m);
983 mdd_changelog_init(env, m);
986 mdd_device_shutdown(env, m, cfg);
988 rc = next->ld_ops->ldo_process_config(env, next, cfg);
996 static int mdd_lov_set_nextid(const struct lu_env *env,
997 struct mdd_device *mdd)
999 struct mds_obd *mds = &mdd->mdd_obd_dev->u.mds;
1003 LASSERT(mds->mds_lov_objids != NULL);
1004 rc = obd_set_info_async(mds->mds_osc_exp, strlen(KEY_NEXT_ID),
1005 KEY_NEXT_ID, mds->mds_lov_desc.ld_tgt_count,
1006 mds->mds_lov_objids, NULL);
1011 static int mdd_cleanup_unlink_llog(const struct lu_env *env,
1012 struct mdd_device *mdd)
1014 /* XXX: to be implemented! */
1019 static int mdd_recovery_complete(const struct lu_env *env,
1020 struct lu_device *d)
1022 struct mdd_device *mdd = lu2mdd_dev(d);
1023 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
1024 struct obd_device *obd = mdd2obd_dev(mdd);
1028 LASSERT(mdd != NULL);
1029 LASSERT(obd != NULL);
1031 /* XXX: Do we need this in new stack? */
1032 rc = mdd_lov_set_nextid(env, mdd);
1034 CERROR("mdd_lov_set_nextid() failed %d\n",
1039 /* XXX: cleanup unlink. */
1040 rc = mdd_cleanup_unlink_llog(env, mdd);
1042 CERROR("mdd_cleanup_unlink_llog() failed %d\n",
1047 /* Call that with obd_recovering = 1 just to update objids */
1048 obd_notify(obd->u.mds.mds_osc_obd, NULL, (obd->obd_async_recov ?
1049 OBD_NOTIFY_SYNC_NONBLOCK : OBD_NOTIFY_SYNC), NULL);
1051 /* Drop obd_recovering to 0 and call o_postrecov to recover mds_lov */
1052 obd->obd_recovering = 0;
1053 obd->obd_type->typ_dt_ops->o_postrecov(obd);
1055 /* XXX: orphans handling. */
1056 __mdd_orphan_cleanup(env, mdd);
1057 rc = next->ld_ops->ldo_recovery_complete(env, next);
1062 static int mdd_prepare(const struct lu_env *env,
1063 struct lu_device *pdev,
1064 struct lu_device *cdev)
1066 struct mdd_device *mdd = lu2mdd_dev(cdev);
1067 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
1068 struct dt_object *root;
1072 rc = next->ld_ops->ldo_prepare(env, cdev, next);
1076 dt_txn_callback_add(mdd->mdd_child, &mdd->mdd_txn_cb);
1077 root = dt_store_open(env, mdd->mdd_child, "", mdd_root_dir_name,
1078 &mdd->mdd_root_fid);
1079 if (!IS_ERR(root)) {
1080 LASSERT(root != NULL);
1081 lu_object_put(env, &root->do_lu);
1082 rc = orph_index_init(env, mdd);
1089 rc = mdd_dot_lustre_setup(env, mdd);
1091 CERROR("Error(%d) initializing .lustre objects\n", rc);
1099 const struct lu_device_operations mdd_lu_ops = {
1100 .ldo_object_alloc = mdd_object_alloc,
1101 .ldo_process_config = mdd_process_config,
1102 .ldo_recovery_complete = mdd_recovery_complete,
1103 .ldo_prepare = mdd_prepare,
1107 * No permission check is needed.
1109 static int mdd_root_get(const struct lu_env *env,
1110 struct md_device *m, struct lu_fid *f)
1112 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1115 *f = mdd->mdd_root_fid;
1120 * No permission check is needed.
1122 static int mdd_statfs(const struct lu_env *env, struct md_device *m,
1123 struct kstatfs *sfs)
1125 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1130 rc = mdd_child_ops(mdd)->dt_statfs(env, mdd->mdd_child, sfs);
1136 * No permission check is needed.
1138 static int mdd_maxsize_get(const struct lu_env *env, struct md_device *m,
1139 int *md_size, int *cookie_size)
1141 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1144 *md_size = mdd_lov_mdsize(env, mdd);
1145 *cookie_size = mdd_lov_cookiesize(env, mdd);
1150 static int mdd_init_capa_ctxt(const struct lu_env *env, struct md_device *m,
1151 int mode, unsigned long timeout, __u32 alg,
1152 struct lustre_capa_key *keys)
1154 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1155 struct mds_obd *mds = &mdd2obd_dev(mdd)->u.mds;
1159 mds->mds_capa_keys = keys;
1160 rc = mdd_child_ops(mdd)->dt_init_capa_ctxt(env, mdd->mdd_child, mode,
1161 timeout, alg, keys);
1165 static int mdd_update_capa_key(const struct lu_env *env,
1166 struct md_device *m,
1167 struct lustre_capa_key *key)
1169 struct mds_capa_info info = { .uuid = NULL, .capa = key };
1170 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1171 struct obd_export *lov_exp = mdd2obd_dev(mdd)->u.mds.mds_osc_exp;
1175 rc = obd_set_info_async(lov_exp, sizeof(KEY_CAPA_KEY), KEY_CAPA_KEY,
1176 sizeof(info), &info, NULL);
1180 static int mdd_llog_ctxt_get(const struct lu_env *env, struct md_device *m,
1183 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1185 *h = llog_group_get_ctxt(&mdd2obd_dev(mdd)->obd_olg, idx);
1186 return (*h == NULL ? -ENOENT : 0);
1189 static struct lu_device *mdd_device_alloc(const struct lu_env *env,
1190 struct lu_device_type *t,
1191 struct lustre_cfg *lcfg)
1193 struct lu_device *l;
1194 struct mdd_device *m;
1198 l = ERR_PTR(-ENOMEM);
1200 md_device_init(&m->mdd_md_dev, t);
1202 l->ld_ops = &mdd_lu_ops;
1203 m->mdd_md_dev.md_ops = &mdd_ops;
1204 md_upcall_init(&m->mdd_md_dev, NULL);
1210 static struct lu_device *mdd_device_free(const struct lu_env *env,
1211 struct lu_device *lu)
1213 struct mdd_device *m = lu2mdd_dev(lu);
1214 struct lu_device *next = &m->mdd_child->dd_lu_dev;
1217 LASSERT(atomic_read(&lu->ld_ref) == 0);
1218 md_device_fini(&m->mdd_md_dev);
1223 static struct obd_ops mdd_obd_device_ops = {
1224 .o_owner = THIS_MODULE
1227 /* context key constructor/destructor: mdd_ucred_key_init, mdd_ucred_key_fini */
1228 LU_KEY_INIT_FINI(mdd_ucred, struct md_ucred);
1230 static struct lu_context_key mdd_ucred_key = {
1231 .lct_tags = LCT_SESSION,
1232 .lct_init = mdd_ucred_key_init,
1233 .lct_fini = mdd_ucred_key_fini
1236 struct md_ucred *md_ucred(const struct lu_env *env)
1238 LASSERT(env->le_ses != NULL);
1239 return lu_context_key_get(env->le_ses, &mdd_ucred_key);
1241 EXPORT_SYMBOL(md_ucred);
1244 * context key constructor/destructor:
1245 * mdd_capainfo_key_init, mdd_capainfo_key_fini
1247 LU_KEY_INIT_FINI(mdd_capainfo, struct md_capainfo);
1249 struct lu_context_key mdd_capainfo_key = {
1250 .lct_tags = LCT_SESSION,
1251 .lct_init = mdd_capainfo_key_init,
1252 .lct_fini = mdd_capainfo_key_fini
1255 struct md_capainfo *md_capainfo(const struct lu_env *env)
1257 /* NB, in mdt_init0 */
1258 if (env->le_ses == NULL)
1260 return lu_context_key_get(env->le_ses, &mdd_capainfo_key);
1262 EXPORT_SYMBOL(md_capainfo);
1264 static int mdd_changelog_user_register(struct mdd_device *mdd, int *id)
1266 struct llog_ctxt *ctxt;
1267 struct llog_changelog_user_rec *rec;
1271 ctxt = llog_get_context(mdd2obd_dev(mdd),LLOG_CHANGELOG_USER_ORIG_CTXT);
1277 llog_ctxt_put(ctxt);
1281 /* Assume we want it on since somebody registered */
1282 rc = mdd_changelog_on(mdd, 1);
1286 rec->cur_hdr.lrh_len = sizeof(*rec);
1287 rec->cur_hdr.lrh_type = CHANGELOG_USER_REC;
1288 spin_lock(&mdd->mdd_cl.mc_user_lock);
1289 if (mdd->mdd_cl.mc_lastuser == (unsigned int)(-1)) {
1290 spin_unlock(&mdd->mdd_cl.mc_user_lock);
1291 CERROR("Maximum number of changelog users exceeded!\n");
1292 GOTO(out, rc = -EOVERFLOW);
1294 *id = rec->cur_id = ++mdd->mdd_cl.mc_lastuser;
1295 rec->cur_endrec = mdd->mdd_cl.mc_index;
1296 spin_unlock(&mdd->mdd_cl.mc_user_lock);
1298 rc = llog_add(ctxt, &rec->cur_hdr, NULL, NULL, 0);
1300 CDEBUG(D_IOCTL, "Registered changelog user %d\n", *id);
1303 llog_ctxt_put(ctxt);
1307 struct mdd_changelog_user_data {
1308 __u64 mcud_endrec; /**< purge record for this user */
1309 __u64 mcud_minrec; /**< lowest changelog recno still referenced */
1311 __u32 mcud_minid; /**< user id with lowest rec reference */
1312 __u32 mcud_usercount;
1315 #define MCUD_UNREGISTER -1LL
1318 * 1. Find the smallest record everyone is willing to purge
1319 * 2. Update the last purgeable record for this user
1321 static int mdd_changelog_user_purge_cb(struct llog_handle *llh,
1322 struct llog_rec_hdr *hdr, void *data)
1324 struct llog_changelog_user_rec *rec;
1325 struct mdd_changelog_user_data *mcud =
1326 (struct mdd_changelog_user_data *)data;
1330 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
1332 rec = (struct llog_changelog_user_rec *)hdr;
1334 mcud->mcud_usercount++;
1336 /* If we have a new endrec for this id, use it for the following
1337 min check instead of its old value */
1338 if (rec->cur_id == mcud->mcud_id)
1339 rec->cur_endrec = max(rec->cur_endrec, mcud->mcud_endrec);
1341 /* Track the minimum referenced record */
1342 if (mcud->mcud_minid == 0 || mcud->mcud_minrec > rec->cur_endrec) {
1343 mcud->mcud_minid = rec->cur_id;
1344 mcud->mcud_minrec = rec->cur_endrec;
1347 if (rec->cur_id != mcud->mcud_id)
1350 /* Update this user's record */
1351 mcud->mcud_found = 1;
1353 /* Special case: unregister this user */
1354 if (mcud->mcud_endrec == MCUD_UNREGISTER) {
1355 struct llog_cookie cookie;
1356 cookie.lgc_lgl = llh->lgh_id;
1357 cookie.lgc_index = hdr->lrh_index;
1358 rc = llog_cat_cancel_records(llh->u.phd.phd_cat_handle,
1361 mcud->mcud_usercount--;
1365 /* Update the endrec */
1366 CDEBUG(D_IOCTL, "Rewriting changelog user %d endrec to "LPU64"\n",
1367 mcud->mcud_id, rec->cur_endrec);
1369 /* hdr+1 is loc of data */
1370 hdr->lrh_len -= sizeof(*hdr) + sizeof(struct llog_rec_tail);
1371 rc = llog_write_rec(llh, hdr, NULL, 0, (void *)(hdr + 1),
1377 static int mdd_changelog_user_purge(struct mdd_device *mdd, int id,
1380 struct mdd_changelog_user_data data;
1381 struct llog_ctxt *ctxt;
1385 CDEBUG(D_IOCTL, "Purge request: id=%d, endrec="LPD64"\n", id, endrec);
1388 data.mcud_minid = 0;
1389 data.mcud_minrec = 0;
1390 data.mcud_usercount = 0;
1391 data.mcud_endrec = endrec;
1392 spin_lock(&mdd->mdd_cl.mc_lock);
1393 endrec = mdd->mdd_cl.mc_index;
1394 spin_unlock(&mdd->mdd_cl.mc_lock);
1395 if ((data.mcud_endrec == 0) ||
1396 ((data.mcud_endrec > endrec) &&
1397 (data.mcud_endrec != MCUD_UNREGISTER)))
1398 data.mcud_endrec = endrec;
1400 ctxt = llog_get_context(mdd2obd_dev(mdd),LLOG_CHANGELOG_USER_ORIG_CTXT);
1403 LASSERT(ctxt->loc_handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
1405 rc = llog_cat_process(ctxt->loc_handle, mdd_changelog_user_purge_cb,
1406 (void *)&data, 0, 0);
1407 if ((rc >= 0) && (data.mcud_minrec > 0)) {
1408 CDEBUG(D_IOCTL, "Purging changelog entries up to "LPD64
1409 ", referenced by "CHANGELOG_USER_PREFIX"%d\n",
1410 data.mcud_minrec, data.mcud_minid);
1411 rc = mdd_changelog_llog_cancel(mdd, data.mcud_minrec);
1413 CWARN("Could not determine changelog records to purge; rc=%d\n",
1417 llog_ctxt_put(ctxt);
1419 if (!data.mcud_found) {
1420 CWARN("No entry for user %d. Last changelog reference is "
1421 LPD64" by changelog user %d\n", data.mcud_id,
1422 data.mcud_minrec, data.mcud_minid);
1426 if (!rc && data.mcud_usercount == 0)
1427 /* No more users; turn changelogs off */
1428 rc = mdd_changelog_on(mdd, 0);
1434 * May be called remotely from mdt_iocontrol_handle or locally from
1435 * mdt_iocontrol. Data may be freeform - remote handling doesn't enforce
1436 * an obd_ioctl_data format (but local ioctl handler does).
1438 * \param len - data len
1439 * \param karg - ioctl data, in kernel space
1441 static int mdd_iocontrol(const struct lu_env *env, struct md_device *m,
1442 unsigned int cmd, int len, void *karg)
1444 struct mdd_device *mdd;
1445 struct obd_ioctl_data *data = karg;
1449 mdd = lu2mdd_dev(&m->md_lu_dev);
1451 /* Doesn't use obd_ioctl_data */
1452 if (cmd == OBD_IOC_CHANGELOG_CLEAR) {
1453 struct changelog_setinfo *cs = karg;
1454 rc = mdd_changelog_user_purge(mdd, cs->cs_id, cs->cs_recno);
1458 /* Below ioctls use obd_ioctl_data */
1459 if (len != sizeof(*data)) {
1460 CERROR("Bad ioctl size %d\n", len);
1463 if (data->ioc_version != OBD_IOCTL_VERSION) {
1464 CERROR("Bad magic %x != %x\n", data->ioc_version,
1470 case OBD_IOC_CHANGELOG_REG:
1471 rc = mdd_changelog_user_register(mdd, &data->ioc_u32_1);
1473 case OBD_IOC_CHANGELOG_DEREG:
1474 rc = mdd_changelog_user_purge(mdd, data->ioc_u32_1,
1484 /* type constructor/destructor: mdd_type_init, mdd_type_fini */
1485 LU_TYPE_INIT_FINI(mdd, &mdd_thread_key, &mdd_ucred_key, &mdd_capainfo_key);
1487 const struct md_device_operations mdd_ops = {
1488 .mdo_statfs = mdd_statfs,
1489 .mdo_root_get = mdd_root_get,
1490 .mdo_maxsize_get = mdd_maxsize_get,
1491 .mdo_init_capa_ctxt = mdd_init_capa_ctxt,
1492 .mdo_update_capa_key= mdd_update_capa_key,
1493 .mdo_llog_ctxt_get = mdd_llog_ctxt_get,
1494 .mdo_iocontrol = mdd_iocontrol,
1495 #ifdef HAVE_QUOTA_SUPPORT
1497 .mqo_notify = mdd_quota_notify,
1498 .mqo_setup = mdd_quota_setup,
1499 .mqo_cleanup = mdd_quota_cleanup,
1500 .mqo_recovery = mdd_quota_recovery,
1501 .mqo_check = mdd_quota_check,
1502 .mqo_on = mdd_quota_on,
1503 .mqo_off = mdd_quota_off,
1504 .mqo_setinfo = mdd_quota_setinfo,
1505 .mqo_getinfo = mdd_quota_getinfo,
1506 .mqo_setquota = mdd_quota_setquota,
1507 .mqo_getquota = mdd_quota_getquota,
1508 .mqo_getoinfo = mdd_quota_getoinfo,
1509 .mqo_getoquota = mdd_quota_getoquota,
1510 .mqo_invalidate = mdd_quota_invalidate,
1511 .mqo_finvalidate = mdd_quota_finvalidate
1516 static struct lu_device_type_operations mdd_device_type_ops = {
1517 .ldto_init = mdd_type_init,
1518 .ldto_fini = mdd_type_fini,
1520 .ldto_start = mdd_type_start,
1521 .ldto_stop = mdd_type_stop,
1523 .ldto_device_alloc = mdd_device_alloc,
1524 .ldto_device_free = mdd_device_free,
1526 .ldto_device_init = mdd_device_init,
1527 .ldto_device_fini = mdd_device_fini
1530 static struct lu_device_type mdd_device_type = {
1531 .ldt_tags = LU_DEVICE_MD,
1532 .ldt_name = LUSTRE_MDD_NAME,
1533 .ldt_ops = &mdd_device_type_ops,
1534 .ldt_ctx_tags = LCT_MD_THREAD
1537 /* context key constructor: mdd_key_init */
1538 LU_KEY_INIT(mdd, struct mdd_thread_info);
1540 static void mdd_key_fini(const struct lu_context *ctx,
1541 struct lu_context_key *key, void *data)
1543 struct mdd_thread_info *info = data;
1544 if (info->mti_max_lmm != NULL)
1545 OBD_FREE(info->mti_max_lmm, info->mti_max_lmm_size);
1546 if (info->mti_max_cookie != NULL)
1547 OBD_FREE(info->mti_max_cookie, info->mti_max_cookie_size);
1548 mdd_buf_put(&info->mti_big_buf);
1553 /* context key: mdd_thread_key */
1554 LU_CONTEXT_KEY_DEFINE(mdd, LCT_MD_THREAD);
1556 static struct lu_local_obj_desc llod_capa_key = {
1557 .llod_name = CAPA_KEYS,
1558 .llod_oid = MDD_CAPA_KEYS_OID,
1562 static struct lu_local_obj_desc llod_mdd_orphan = {
1563 .llod_name = orph_index_name,
1564 .llod_oid = MDD_ORPHAN_OID,
1566 .llod_feat = &dt_directory_features,
1569 static struct lu_local_obj_desc llod_mdd_root = {
1570 .llod_name = mdd_root_dir_name,
1571 .llod_oid = MDD_ROOT_INDEX_OID,
1573 .llod_feat = &dt_directory_features,
1576 static int __init mdd_mod_init(void)
1578 struct lprocfs_static_vars lvars;
1579 lprocfs_mdd_init_vars(&lvars);
1581 llo_local_obj_register(&llod_capa_key);
1582 llo_local_obj_register(&llod_mdd_orphan);
1583 llo_local_obj_register(&llod_mdd_root);
1585 return class_register_type(&mdd_obd_device_ops, NULL, lvars.module_vars,
1586 LUSTRE_MDD_NAME, &mdd_device_type);
1589 static void __exit mdd_mod_exit(void)
1591 llo_local_obj_unregister(&llod_capa_key);
1592 llo_local_obj_unregister(&llod_mdd_orphan);
1593 llo_local_obj_unregister(&llod_mdd_root);
1595 class_unregister_type(LUSTRE_MDD_NAME);
1598 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
1599 MODULE_DESCRIPTION("Lustre Meta-data Device Prototype ("LUSTRE_MDD_NAME")");
1600 MODULE_LICENSE("GPL");
1602 cfs_module(mdd, "0.1.0", mdd_mod_init, mdd_mod_exit);