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 (c) 2007, 2010, Oracle and/or its affiliates. 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;
98 /* sync permission changes */
99 mdd->mdd_sync_permission = 1;
101 rc = mdd_procfs_init(mdd, name);
105 static struct lu_device *mdd_device_fini(const struct lu_env *env,
108 struct mdd_device *mdd = lu2mdd_dev(d);
109 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
112 rc = mdd_procfs_fini(mdd);
114 CERROR("proc fini error %d \n", rc);
120 static void mdd_changelog_fini(const struct lu_env *env,
121 struct mdd_device *mdd);
123 static void mdd_device_shutdown(const struct lu_env *env,
124 struct mdd_device *m, struct lustre_cfg *cfg)
127 mdd_changelog_fini(env, m);
128 dt_txn_callback_del(m->mdd_child, &m->mdd_txn_cb);
129 if (m->mdd_dot_lustre_objs.mdd_obf)
130 mdd_object_put(env, m->mdd_dot_lustre_objs.mdd_obf);
131 if (m->mdd_dot_lustre)
132 mdd_object_put(env, m->mdd_dot_lustre);
134 mdd_fini_obd(env, m, cfg);
135 orph_index_fini(env, m);
136 /* remove upcall device*/
137 md_upcall_fini(&m->mdd_md_dev);
141 static int changelog_init_cb(struct llog_handle *llh, struct llog_rec_hdr *hdr,
144 struct mdd_device *mdd = (struct mdd_device *)data;
145 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
148 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
149 LASSERT(rec->cr_hdr.lrh_type == CHANGELOG_REC);
152 "seeing record at index %d/%d/"LPU64" t=%x %.*s in log "LPX64"\n",
153 hdr->lrh_index, rec->cr_hdr.lrh_index, rec->cr.cr_index,
154 rec->cr.cr_type, rec->cr.cr_namelen, rec->cr.cr_name,
155 llh->lgh_id.lgl_oid);
157 mdd->mdd_cl.mc_index = rec->cr.cr_index;
158 RETURN(LLOG_PROC_BREAK);
161 static int changelog_user_init_cb(struct llog_handle *llh,
162 struct llog_rec_hdr *hdr, void *data)
164 struct mdd_device *mdd = (struct mdd_device *)data;
165 struct llog_changelog_user_rec *rec =
166 (struct llog_changelog_user_rec *)hdr;
169 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
170 LASSERT(rec->cur_hdr.lrh_type == CHANGELOG_USER_REC);
172 CDEBUG(D_INFO, "seeing user at index %d/%d id=%d endrec="LPU64
173 " in log "LPX64"\n", hdr->lrh_index, rec->cur_hdr.lrh_index,
174 rec->cur_id, rec->cur_endrec, llh->lgh_id.lgl_oid);
176 cfs_spin_lock(&mdd->mdd_cl.mc_user_lock);
177 mdd->mdd_cl.mc_lastuser = rec->cur_id;
178 cfs_spin_unlock(&mdd->mdd_cl.mc_user_lock);
180 RETURN(LLOG_PROC_BREAK);
184 static int mdd_changelog_llog_init(struct mdd_device *mdd)
186 struct obd_device *obd = mdd2obd_dev(mdd);
187 struct llog_ctxt *ctxt;
190 /* Find last changelog entry number */
191 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
193 CERROR("no changelog context\n");
196 if (!ctxt->loc_handle) {
201 rc = llog_cat_reverse_process(ctxt->loc_handle, changelog_init_cb, mdd);
205 CERROR("changelog init failed: %d\n", rc);
208 CDEBUG(D_IOCTL, "changelog starting index="LPU64"\n",
209 mdd->mdd_cl.mc_index);
211 /* Find last changelog user id */
212 ctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT);
214 CERROR("no changelog user context\n");
217 if (!ctxt->loc_handle) {
222 rc = llog_cat_reverse_process(ctxt->loc_handle, changelog_user_init_cb,
227 CERROR("changelog user init failed: %d\n", rc);
231 /* If we have registered users, assume we want changelogs on */
232 if (mdd->mdd_cl.mc_lastuser > 0)
233 rc = mdd_changelog_on(mdd, 1);
238 static int mdd_changelog_init(const struct lu_env *env, struct mdd_device *mdd)
242 mdd->mdd_cl.mc_index = 0;
243 cfs_spin_lock_init(&mdd->mdd_cl.mc_lock);
244 cfs_waitq_init(&mdd->mdd_cl.mc_waitq);
245 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
246 mdd->mdd_cl.mc_flags = 0; /* off by default */
247 mdd->mdd_cl.mc_mask = CHANGELOG_DEFMASK;
248 cfs_spin_lock_init(&mdd->mdd_cl.mc_user_lock);
249 mdd->mdd_cl.mc_lastuser = 0;
251 rc = mdd_changelog_llog_init(mdd);
253 CERROR("Changelog setup during init failed %d\n", rc);
254 mdd->mdd_cl.mc_flags |= CLM_ERR;
260 static void mdd_changelog_fini(const struct lu_env *env, struct mdd_device *mdd)
262 mdd->mdd_cl.mc_flags = 0;
265 /* Start / stop recording */
266 int mdd_changelog_on(struct mdd_device *mdd, int on)
270 if ((on == 1) && ((mdd->mdd_cl.mc_flags & CLM_ON) == 0)) {
271 LCONSOLE_INFO("%s: changelog on\n", mdd2obd_dev(mdd)->obd_name);
272 if (mdd->mdd_cl.mc_flags & CLM_ERR) {
273 CERROR("Changelogs cannot be enabled due to error "
274 "condition (see %s log).\n",
275 mdd2obd_dev(mdd)->obd_name);
278 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
279 mdd->mdd_cl.mc_flags |= CLM_ON;
280 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
281 rc = mdd_changelog_write_header(mdd, CLM_START);
283 } else if ((on == 0) && ((mdd->mdd_cl.mc_flags & CLM_ON) == CLM_ON)) {
284 LCONSOLE_INFO("%s: changelog off\n",mdd2obd_dev(mdd)->obd_name);
285 rc = mdd_changelog_write_header(mdd, CLM_FINI);
286 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
287 mdd->mdd_cl.mc_flags &= ~CLM_ON;
288 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
293 static __u64 cl_time(void) {
296 cfs_fs_time_current(&time);
297 return (((__u64)time.tv_sec) << 30) + time.tv_nsec;
300 /** Add a changelog entry \a rec to the changelog llog
303 * \param handle - currently ignored since llogs start their own transaction;
304 * this will hopefully be fixed in llog rewrite
307 int mdd_changelog_llog_write(struct mdd_device *mdd,
308 struct llog_changelog_rec *rec,
309 struct thandle *handle)
311 struct obd_device *obd = mdd2obd_dev(mdd);
312 struct llog_ctxt *ctxt;
315 rec->cr_hdr.lrh_len = llog_data_len(sizeof(*rec) + rec->cr.cr_namelen);
316 /* llog_lvfs_write_rec sets the llog tail len */
317 rec->cr_hdr.lrh_type = CHANGELOG_REC;
318 rec->cr.cr_time = cl_time();
319 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
320 /* NB: I suppose it's possible llog_add adds out of order wrt cr_index,
321 but as long as the MDD transactions are ordered correctly for e.g.
322 rename conflicts, I don't think this should matter. */
323 rec->cr.cr_index = ++mdd->mdd_cl.mc_index;
324 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
325 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
329 /* nested journal transaction */
330 rc = llog_add(ctxt, &rec->cr_hdr, NULL, NULL, 0);
333 cfs_waitq_signal(&mdd->mdd_cl.mc_waitq);
338 /** Remove entries with indicies up to and including \a endrec from the
344 int mdd_changelog_llog_cancel(struct mdd_device *mdd, long long endrec)
346 struct obd_device *obd = mdd2obd_dev(mdd);
347 struct llog_ctxt *ctxt;
348 long long unsigned cur;
351 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
355 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
356 cur = (long long)mdd->mdd_cl.mc_index;
357 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
361 /* purge to "0" is shorthand for everything */
365 /* If purging all records, write a header entry so we don't have an
366 empty catalog and we're sure to have a valid starting index next
367 time. In case of crash, we just restart with old log so we're
370 rc = mdd_changelog_write_header(mdd, CLM_PURGE);
375 /* Some records were purged, so reset repeat-access time (so we
376 record new mtime update records, so users can see a file has been
377 changed since the last purge) */
378 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
380 rc = llog_cancel(ctxt, NULL, 1, (struct llog_cookie *)&endrec, 0);
386 /** Add a CL_MARK record to the changelog
388 * \param markerflags - CLM_*
391 int mdd_changelog_write_header(struct mdd_device *mdd, int markerflags)
393 struct obd_device *obd = mdd2obd_dev(mdd);
394 struct llog_changelog_rec *rec;
396 int len = strlen(obd->obd_name);
400 reclen = llog_data_len(sizeof(*rec) + len);
401 OBD_ALLOC(rec, reclen);
405 rec->cr.cr_flags = CLF_VERSION;
406 rec->cr.cr_type = CL_MARK;
407 rec->cr.cr_namelen = len;
408 memcpy(rec->cr.cr_name, obd->obd_name, rec->cr.cr_namelen);
409 /* Status and action flags */
410 rec->cr.cr_markerflags = mdd->mdd_cl.mc_flags | markerflags;
412 rc = (mdd->mdd_cl.mc_mask & (1 << CL_MARK)) ?
413 mdd_changelog_llog_write(mdd, rec, NULL) : 0;
415 /* assume on or off event; reset repeat-access time */
416 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
418 OBD_FREE(rec, reclen);
423 * Create ".lustre" directory.
425 static int create_dot_lustre_dir(const struct lu_env *env, struct mdd_device *m)
427 struct lu_fid *fid = &mdd_env_info(env)->mti_fid;
428 struct md_object *mdo;
431 memcpy(fid, &LU_DOT_LUSTRE_FID, sizeof(struct lu_fid));
432 mdo = llo_store_create_index(env, &m->mdd_md_dev, m->mdd_child,
433 mdd_root_dir_name, dot_lustre_name,
434 fid, &dt_directory_features);
435 /* .lustre dir may be already present */
436 if (IS_ERR(mdo) && PTR_ERR(mdo) != -EEXIST) {
438 CERROR("creating obj [%s] fid = "DFID" rc = %d\n",
439 dot_lustre_name, PFID(fid), rc);
444 lu_object_put(env, &mdo->mo_lu);
450 static int dot_lustre_mdd_permission(const struct lu_env *env,
451 struct md_object *pobj,
452 struct md_object *cobj,
453 struct md_attr *attr, int mask)
455 if (mask & ~(MAY_READ | MAY_EXEC))
461 static int dot_lustre_mdd_attr_get(const struct lu_env *env,
462 struct md_object *obj, struct md_attr *ma)
464 struct mdd_object *mdd_obj = md2mdd_obj(obj);
466 return mdd_attr_get_internal_locked(env, mdd_obj, ma);
469 static int dot_lustre_mdd_attr_set(const struct lu_env *env,
470 struct md_object *obj,
471 const struct md_attr *ma)
476 static int dot_lustre_mdd_xattr_get(const struct lu_env *env,
477 struct md_object *obj, struct lu_buf *buf,
483 static int dot_lustre_mdd_xattr_list(const struct lu_env *env,
484 struct md_object *obj, struct lu_buf *buf)
489 static int dot_lustre_mdd_xattr_set(const struct lu_env *env,
490 struct md_object *obj,
491 const struct lu_buf *buf, const char *name,
497 static int dot_lustre_mdd_xattr_del(const struct lu_env *env,
498 struct md_object *obj,
504 static int dot_lustre_mdd_readlink(const struct lu_env *env,
505 struct md_object *obj, struct lu_buf *buf)
510 static int dot_lustre_mdd_object_create(const struct lu_env *env,
511 struct md_object *obj,
512 const struct md_op_spec *spec,
518 static int dot_lustre_mdd_ref_add(const struct lu_env *env,
519 struct md_object *obj,
520 const struct md_attr *ma)
525 static int dot_lustre_mdd_ref_del(const struct lu_env *env,
526 struct md_object *obj,
532 static int dot_lustre_mdd_open(const struct lu_env *env, struct md_object *obj,
535 struct mdd_object *mdd_obj = md2mdd_obj(obj);
537 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
538 mdd_obj->mod_count++;
539 mdd_write_unlock(env, mdd_obj);
544 static int dot_lustre_mdd_close(const struct lu_env *env, struct md_object *obj,
547 struct mdd_object *mdd_obj = md2mdd_obj(obj);
549 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
550 mdd_obj->mod_count--;
551 mdd_write_unlock(env, mdd_obj);
556 static int dot_lustre_mdd_object_sync(const struct lu_env *env,
557 struct md_object *obj)
562 static dt_obj_version_t dot_lustre_mdd_version_get(const struct lu_env *env,
563 struct md_object *obj)
568 static void dot_lustre_mdd_version_set(const struct lu_env *env,
569 struct md_object *obj,
570 dt_obj_version_t version)
575 static int dot_lustre_mdd_path(const struct lu_env *env, struct md_object *obj,
576 char *path, int pathlen, __u64 *recno, int *linkno)
582 static struct md_object_operations mdd_dot_lustre_obj_ops = {
583 .moo_permission = dot_lustre_mdd_permission,
584 .moo_attr_get = dot_lustre_mdd_attr_get,
585 .moo_attr_set = dot_lustre_mdd_attr_set,
586 .moo_xattr_get = dot_lustre_mdd_xattr_get,
587 .moo_xattr_list = dot_lustre_mdd_xattr_list,
588 .moo_xattr_set = dot_lustre_mdd_xattr_set,
589 .moo_xattr_del = dot_lustre_mdd_xattr_del,
590 .moo_readpage = mdd_readpage,
591 .moo_readlink = dot_lustre_mdd_readlink,
592 .moo_object_create = dot_lustre_mdd_object_create,
593 .moo_ref_add = dot_lustre_mdd_ref_add,
594 .moo_ref_del = dot_lustre_mdd_ref_del,
595 .moo_open = dot_lustre_mdd_open,
596 .moo_close = dot_lustre_mdd_close,
597 .moo_capa_get = mdd_capa_get,
598 .moo_object_sync = dot_lustre_mdd_object_sync,
599 .moo_version_get = dot_lustre_mdd_version_get,
600 .moo_version_set = dot_lustre_mdd_version_set,
601 .moo_path = dot_lustre_mdd_path,
605 static int dot_lustre_mdd_lookup(const struct lu_env *env, struct md_object *p,
606 const struct lu_name *lname, struct lu_fid *f,
607 struct md_op_spec *spec)
609 if (strcmp(lname->ln_name, mdd_obf_dir_name) == 0)
617 static mdl_mode_t dot_lustre_mdd_lock_mode(const struct lu_env *env,
618 struct md_object *obj,
624 static int dot_lustre_mdd_create(const struct lu_env *env,
625 struct md_object *pobj,
626 const struct lu_name *lname,
627 struct md_object *child,
628 struct md_op_spec *spec,
634 static int dot_lustre_mdd_create_data(const struct lu_env *env,
637 const struct md_op_spec *spec,
643 static int dot_lustre_mdd_rename(const struct lu_env *env,
644 struct md_object *src_pobj,
645 struct md_object *tgt_pobj,
646 const struct lu_fid *lf,
647 const struct lu_name *lsname,
648 struct md_object *tobj,
649 const struct lu_name *ltname,
655 static int dot_lustre_mdd_link(const struct lu_env *env,
656 struct md_object *tgt_obj,
657 struct md_object *src_obj,
658 const struct lu_name *lname,
664 static int dot_lustre_mdd_unlink(const struct lu_env *env,
665 struct md_object *pobj,
666 struct md_object *cobj,
667 const struct lu_name *lname,
673 static int dot_lustre_mdd_name_insert(const struct lu_env *env,
674 struct md_object *obj,
675 const struct lu_name *lname,
676 const struct lu_fid *fid,
677 const struct md_attr *ma)
682 static int dot_lustre_mdd_name_remove(const struct lu_env *env,
683 struct md_object *obj,
684 const struct lu_name *lname,
685 const struct md_attr *ma)
690 static int dot_lustre_mdd_rename_tgt(const struct lu_env *env,
691 struct md_object *pobj,
692 struct md_object *tobj,
693 const struct lu_fid *fid,
694 const struct lu_name *lname,
701 static struct md_dir_operations mdd_dot_lustre_dir_ops = {
702 .mdo_is_subdir = mdd_is_subdir,
703 .mdo_lookup = dot_lustre_mdd_lookup,
704 .mdo_lock_mode = dot_lustre_mdd_lock_mode,
705 .mdo_create = dot_lustre_mdd_create,
706 .mdo_create_data = dot_lustre_mdd_create_data,
707 .mdo_rename = dot_lustre_mdd_rename,
708 .mdo_link = dot_lustre_mdd_link,
709 .mdo_unlink = dot_lustre_mdd_unlink,
710 .mdo_name_insert = dot_lustre_mdd_name_insert,
711 .mdo_name_remove = dot_lustre_mdd_name_remove,
712 .mdo_rename_tgt = dot_lustre_mdd_rename_tgt,
715 static int obf_attr_get(const struct lu_env *env, struct md_object *obj,
720 if (ma->ma_need & MA_INODE) {
721 struct mdd_device *mdd = mdo2mdd(obj);
723 /* "fid" is a virtual object and hence does not have any "real"
724 * attributes. So we reuse attributes of .lustre for "fid" dir */
725 ma->ma_need |= MA_INODE;
726 rc = dot_lustre_mdd_attr_get(env, &mdd->mdd_dot_lustre->mod_obj,
730 ma->ma_valid |= MA_INODE;
733 /* "fid" directory does not have any striping information. */
734 if (ma->ma_need & MA_LOV) {
735 struct mdd_object *mdd_obj = md2mdd_obj(obj);
737 if (ma->ma_valid & MA_LOV)
740 if (!(S_ISREG(mdd_object_type(mdd_obj)) ||
741 S_ISDIR(mdd_object_type(mdd_obj))))
744 if (ma->ma_need & MA_LOV_DEF) {
745 rc = mdd_get_default_md(mdd_obj, ma->ma_lmm);
747 ma->ma_lmm_size = rc;
748 ma->ma_valid |= MA_LOV;
757 static int obf_attr_set(const struct lu_env *env, struct md_object *obj,
758 const struct md_attr *ma)
763 static int obf_xattr_get(const struct lu_env *env,
764 struct md_object *obj, struct lu_buf *buf,
770 static int obf_mdd_open(const struct lu_env *env, struct md_object *obj,
773 struct mdd_object *mdd_obj = md2mdd_obj(obj);
775 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
776 mdd_obj->mod_count++;
777 mdd_write_unlock(env, mdd_obj);
782 static int obf_mdd_close(const struct lu_env *env, struct md_object *obj,
785 struct mdd_object *mdd_obj = md2mdd_obj(obj);
787 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
788 mdd_obj->mod_count--;
789 mdd_write_unlock(env, mdd_obj);
794 /** Nothing to list in "fid" directory */
795 static int obf_mdd_readpage(const struct lu_env *env, struct md_object *obj,
796 const struct lu_rdpg *rdpg)
801 static int obf_path(const struct lu_env *env, struct md_object *obj,
802 char *path, int pathlen, __u64 *recno, int *linkno)
807 static struct md_object_operations mdd_obf_obj_ops = {
808 .moo_attr_get = obf_attr_get,
809 .moo_attr_set = obf_attr_set,
810 .moo_xattr_get = obf_xattr_get,
811 .moo_open = obf_mdd_open,
812 .moo_close = obf_mdd_close,
813 .moo_readpage = obf_mdd_readpage,
818 * Lookup method for "fid" object. Only filenames with correct SEQ:OID format
819 * are valid. We also check if object with passed fid exists or not.
821 static int obf_lookup(const struct lu_env *env, struct md_object *p,
822 const struct lu_name *lname, struct lu_fid *f,
823 struct md_op_spec *spec)
825 char *name = (char *)lname->ln_name;
826 struct mdd_device *mdd = mdo2mdd(p);
827 struct mdd_object *child;
833 sscanf(name, SFID, RFID(f));
834 if (!fid_is_sane(f)) {
835 CWARN("bad FID format [%s], should be "DFID"\n", lname->ln_name,
837 GOTO(out, rc = -EINVAL);
840 /* Check if object with this fid exists */
841 child = mdd_object_find(env, mdd, f);
845 GOTO(out, rc = PTR_ERR(child));
847 if (mdd_object_exists(child) == 0)
850 mdd_object_put(env, child);
856 static int obf_create(const struct lu_env *env, struct md_object *pobj,
857 const struct lu_name *lname, struct md_object *child,
858 struct md_op_spec *spec, struct md_attr* ma)
863 static int obf_rename(const struct lu_env *env,
864 struct md_object *src_pobj, struct md_object *tgt_pobj,
865 const struct lu_fid *lf, const struct lu_name *lsname,
866 struct md_object *tobj, const struct lu_name *ltname,
872 static int obf_link(const struct lu_env *env, struct md_object *tgt_obj,
873 struct md_object *src_obj, const struct lu_name *lname,
879 static int obf_unlink(const struct lu_env *env, struct md_object *pobj,
880 struct md_object *cobj, const struct lu_name *lname,
886 static struct md_dir_operations mdd_obf_dir_ops = {
887 .mdo_lookup = obf_lookup,
888 .mdo_create = obf_create,
889 .mdo_rename = obf_rename,
890 .mdo_link = obf_link,
891 .mdo_unlink = obf_unlink
895 * Create special in-memory "fid" object for open-by-fid.
897 static int mdd_obf_setup(const struct lu_env *env, struct mdd_device *m)
899 struct mdd_object *mdd_obf;
900 struct lu_object *obf_lu_obj;
903 m->mdd_dot_lustre_objs.mdd_obf = mdd_object_find(env, m,
905 if (m->mdd_dot_lustre_objs.mdd_obf == NULL ||
906 IS_ERR(m->mdd_dot_lustre_objs.mdd_obf))
907 GOTO(out, rc = -ENOENT);
909 mdd_obf = m->mdd_dot_lustre_objs.mdd_obf;
910 mdd_obf->mod_obj.mo_dir_ops = &mdd_obf_dir_ops;
911 mdd_obf->mod_obj.mo_ops = &mdd_obf_obj_ops;
912 /* Don't allow objects to be created in "fid" dir */
913 mdd_obf->mod_flags |= IMMUTE_OBJ;
915 obf_lu_obj = mdd2lu_obj(mdd_obf);
916 obf_lu_obj->lo_header->loh_attr |= (LOHA_EXISTS | S_IFDIR);
922 /** Setup ".lustre" directory object */
923 static int mdd_dot_lustre_setup(const struct lu_env *env, struct mdd_device *m)
925 struct dt_object *dt_dot_lustre;
926 struct lu_fid *fid = &mdd_env_info(env)->mti_fid;
929 rc = create_dot_lustre_dir(env, m);
933 dt_dot_lustre = dt_store_open(env, m->mdd_child, mdd_root_dir_name,
934 dot_lustre_name, fid);
935 if (IS_ERR(dt_dot_lustre)) {
936 rc = PTR_ERR(dt_dot_lustre);
940 /* references are released in mdd_device_shutdown() */
941 m->mdd_dot_lustre = lu2mdd_obj(lu_object_locate(dt_dot_lustre->do_lu.lo_header,
944 m->mdd_dot_lustre->mod_obj.mo_dir_ops = &mdd_dot_lustre_dir_ops;
945 m->mdd_dot_lustre->mod_obj.mo_ops = &mdd_dot_lustre_obj_ops;
947 rc = mdd_obf_setup(env, m);
949 CERROR("Error initializing \"fid\" object - %d.\n", rc);
955 static int mdd_process_config(const struct lu_env *env,
956 struct lu_device *d, struct lustre_cfg *cfg)
958 struct mdd_device *m = lu2mdd_dev(d);
959 struct dt_device *dt = m->mdd_child;
960 struct lu_device *next = &dt->dd_lu_dev;
964 switch (cfg->lcfg_command) {
966 struct lprocfs_static_vars lvars;
968 lprocfs_mdd_init_vars(&lvars);
969 rc = class_process_proc_param(PARAM_MDD, lvars.obd_vars, cfg,m);
970 if (rc > 0 || rc == -ENOSYS)
971 /* we don't understand; pass it on */
972 rc = next->ld_ops->ldo_process_config(env, next, cfg);
976 rc = next->ld_ops->ldo_process_config(env, next, cfg);
979 dt->dd_ops->dt_conf_get(env, dt, &m->mdd_dt_conf);
981 rc = mdd_init_obd(env, m, cfg);
983 CERROR("lov init error %d \n", rc);
986 rc = mdd_txn_init_credits(env, m);
990 mdd_changelog_init(env, m);
993 mdd_device_shutdown(env, m, cfg);
995 rc = next->ld_ops->ldo_process_config(env, next, cfg);
1003 static int mdd_lov_set_nextid(const struct lu_env *env,
1004 struct mdd_device *mdd)
1006 struct mds_obd *mds = &mdd->mdd_obd_dev->u.mds;
1010 LASSERT(mds->mds_lov_objids != NULL);
1011 rc = obd_set_info_async(mds->mds_lov_exp, strlen(KEY_NEXT_ID),
1012 KEY_NEXT_ID, mds->mds_lov_desc.ld_tgt_count,
1013 mds->mds_lov_objids, NULL);
1018 static int mdd_cleanup_unlink_llog(const struct lu_env *env,
1019 struct mdd_device *mdd)
1021 /* XXX: to be implemented! */
1026 static int mdd_recovery_complete(const struct lu_env *env,
1027 struct lu_device *d)
1029 struct mdd_device *mdd = lu2mdd_dev(d);
1030 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
1031 struct obd_device *obd = mdd2obd_dev(mdd);
1035 LASSERT(mdd != NULL);
1036 LASSERT(obd != NULL);
1038 /* XXX: Do we need this in new stack? */
1039 rc = mdd_lov_set_nextid(env, mdd);
1041 CERROR("mdd_lov_set_nextid() failed %d\n",
1046 /* XXX: cleanup unlink. */
1047 rc = mdd_cleanup_unlink_llog(env, mdd);
1049 CERROR("mdd_cleanup_unlink_llog() failed %d\n",
1054 /* Call that with obd_recovering = 1 just to update objids */
1055 obd_notify(obd->u.mds.mds_lov_obd, NULL, (obd->obd_async_recov ?
1056 OBD_NOTIFY_SYNC_NONBLOCK : OBD_NOTIFY_SYNC), NULL);
1058 /* Drop obd_recovering to 0 and call o_postrecov to recover mds_lov */
1059 cfs_spin_lock(&obd->obd_dev_lock);
1060 obd->obd_recovering = 0;
1061 cfs_spin_unlock(&obd->obd_dev_lock);
1062 obd->obd_type->typ_dt_ops->o_postrecov(obd);
1064 /* XXX: orphans handling. */
1065 __mdd_orphan_cleanup(env, mdd);
1066 rc = next->ld_ops->ldo_recovery_complete(env, next);
1071 static int mdd_prepare(const struct lu_env *env,
1072 struct lu_device *pdev,
1073 struct lu_device *cdev)
1075 struct mdd_device *mdd = lu2mdd_dev(cdev);
1076 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
1077 struct dt_object *root;
1081 rc = next->ld_ops->ldo_prepare(env, cdev, next);
1085 dt_txn_callback_add(mdd->mdd_child, &mdd->mdd_txn_cb);
1086 root = dt_store_open(env, mdd->mdd_child, "", mdd_root_dir_name,
1087 &mdd->mdd_root_fid);
1088 if (!IS_ERR(root)) {
1089 LASSERT(root != NULL);
1090 lu_object_put(env, &root->do_lu);
1091 rc = orph_index_init(env, mdd);
1098 rc = mdd_dot_lustre_setup(env, mdd);
1100 CERROR("Error(%d) initializing .lustre objects\n", rc);
1108 const struct lu_device_operations mdd_lu_ops = {
1109 .ldo_object_alloc = mdd_object_alloc,
1110 .ldo_process_config = mdd_process_config,
1111 .ldo_recovery_complete = mdd_recovery_complete,
1112 .ldo_prepare = mdd_prepare,
1116 * No permission check is needed.
1118 static int mdd_root_get(const struct lu_env *env,
1119 struct md_device *m, struct lu_fid *f)
1121 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1124 *f = mdd->mdd_root_fid;
1129 * No permission check is needed.
1131 static int mdd_statfs(const struct lu_env *env, struct md_device *m,
1134 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1139 rc = mdd_child_ops(mdd)->dt_statfs(env, mdd->mdd_child, sfs);
1145 * No permission check is needed.
1147 static int mdd_maxsize_get(const struct lu_env *env, struct md_device *m,
1148 int *md_size, int *cookie_size)
1150 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1153 *md_size = mdd_lov_mdsize(env, mdd);
1154 *cookie_size = mdd_lov_cookiesize(env, mdd);
1159 static int mdd_init_capa_ctxt(const struct lu_env *env, struct md_device *m,
1160 int mode, unsigned long timeout, __u32 alg,
1161 struct lustre_capa_key *keys)
1163 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1164 struct mds_obd *mds = &mdd2obd_dev(mdd)->u.mds;
1168 /* need barrier for mds_capa_keys access. */
1169 cfs_down_write(&mds->mds_notify_lock);
1170 mds->mds_capa_keys = keys;
1171 cfs_up_write(&mds->mds_notify_lock);
1173 rc = mdd_child_ops(mdd)->dt_init_capa_ctxt(env, mdd->mdd_child, mode,
1174 timeout, alg, keys);
1178 static int mdd_update_capa_key(const struct lu_env *env,
1179 struct md_device *m,
1180 struct lustre_capa_key *key)
1182 struct mds_capa_info info = { .uuid = NULL, .capa = key };
1183 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1184 struct obd_export *lov_exp = mdd2obd_dev(mdd)->u.mds.mds_lov_exp;
1188 rc = obd_set_info_async(lov_exp, sizeof(KEY_CAPA_KEY), KEY_CAPA_KEY,
1189 sizeof(info), &info, NULL);
1193 static int mdd_llog_ctxt_get(const struct lu_env *env, struct md_device *m,
1196 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1198 *h = llog_group_get_ctxt(&mdd2obd_dev(mdd)->obd_olg, idx);
1199 return (*h == NULL ? -ENOENT : 0);
1202 static struct lu_device *mdd_device_alloc(const struct lu_env *env,
1203 struct lu_device_type *t,
1204 struct lustre_cfg *lcfg)
1206 struct lu_device *l;
1207 struct mdd_device *m;
1211 l = ERR_PTR(-ENOMEM);
1213 md_device_init(&m->mdd_md_dev, t);
1215 l->ld_ops = &mdd_lu_ops;
1216 m->mdd_md_dev.md_ops = &mdd_ops;
1217 md_upcall_init(&m->mdd_md_dev, NULL);
1223 static struct lu_device *mdd_device_free(const struct lu_env *env,
1224 struct lu_device *lu)
1226 struct mdd_device *m = lu2mdd_dev(lu);
1227 struct lu_device *next = &m->mdd_child->dd_lu_dev;
1230 LASSERT(cfs_atomic_read(&lu->ld_ref) == 0);
1231 md_device_fini(&m->mdd_md_dev);
1236 static struct obd_ops mdd_obd_device_ops = {
1237 .o_owner = THIS_MODULE
1240 /* context key constructor/destructor: mdd_ucred_key_init, mdd_ucred_key_fini */
1241 LU_KEY_INIT_FINI(mdd_ucred, struct md_ucred);
1243 static struct lu_context_key mdd_ucred_key = {
1244 .lct_tags = LCT_SESSION,
1245 .lct_init = mdd_ucred_key_init,
1246 .lct_fini = mdd_ucred_key_fini
1249 struct md_ucred *md_ucred(const struct lu_env *env)
1251 LASSERT(env->le_ses != NULL);
1252 return lu_context_key_get(env->le_ses, &mdd_ucred_key);
1254 EXPORT_SYMBOL(md_ucred);
1257 * context key constructor/destructor:
1258 * mdd_capainfo_key_init, mdd_capainfo_key_fini
1260 LU_KEY_INIT_FINI(mdd_capainfo, struct md_capainfo);
1262 struct lu_context_key mdd_capainfo_key = {
1263 .lct_tags = LCT_SESSION,
1264 .lct_init = mdd_capainfo_key_init,
1265 .lct_fini = mdd_capainfo_key_fini
1268 struct md_capainfo *md_capainfo(const struct lu_env *env)
1270 /* NB, in mdt_init0 */
1271 if (env->le_ses == NULL)
1273 return lu_context_key_get(env->le_ses, &mdd_capainfo_key);
1275 EXPORT_SYMBOL(md_capainfo);
1278 * context key constructor/destructor:
1279 * mdd_quota_key_init, mdd_quota_key_fini
1281 LU_KEY_INIT_FINI(mdd_quota, struct md_quota);
1283 struct lu_context_key mdd_quota_key = {
1284 .lct_tags = LCT_SESSION,
1285 .lct_init = mdd_quota_key_init,
1286 .lct_fini = mdd_quota_key_fini
1289 struct md_quota *md_quota(const struct lu_env *env)
1291 LASSERT(env->le_ses != NULL);
1292 return lu_context_key_get(env->le_ses, &mdd_quota_key);
1294 EXPORT_SYMBOL(md_quota);
1296 static int mdd_changelog_user_register(struct mdd_device *mdd, int *id)
1298 struct llog_ctxt *ctxt;
1299 struct llog_changelog_user_rec *rec;
1303 ctxt = llog_get_context(mdd2obd_dev(mdd),LLOG_CHANGELOG_USER_ORIG_CTXT);
1309 llog_ctxt_put(ctxt);
1313 /* Assume we want it on since somebody registered */
1314 rc = mdd_changelog_on(mdd, 1);
1318 rec->cur_hdr.lrh_len = sizeof(*rec);
1319 rec->cur_hdr.lrh_type = CHANGELOG_USER_REC;
1320 cfs_spin_lock(&mdd->mdd_cl.mc_user_lock);
1321 if (mdd->mdd_cl.mc_lastuser == (unsigned int)(-1)) {
1322 cfs_spin_unlock(&mdd->mdd_cl.mc_user_lock);
1323 CERROR("Maximum number of changelog users exceeded!\n");
1324 GOTO(out, rc = -EOVERFLOW);
1326 *id = rec->cur_id = ++mdd->mdd_cl.mc_lastuser;
1327 rec->cur_endrec = mdd->mdd_cl.mc_index;
1328 cfs_spin_unlock(&mdd->mdd_cl.mc_user_lock);
1330 rc = llog_add(ctxt, &rec->cur_hdr, NULL, NULL, 0);
1332 CDEBUG(D_IOCTL, "Registered changelog user %d\n", *id);
1335 llog_ctxt_put(ctxt);
1339 struct mdd_changelog_user_data {
1340 __u64 mcud_endrec; /**< purge record for this user */
1341 __u64 mcud_minrec; /**< lowest changelog recno still referenced */
1343 __u32 mcud_minid; /**< user id with lowest rec reference */
1344 __u32 mcud_usercount;
1347 #define MCUD_UNREGISTER -1LL
1350 * 1. Find the smallest record everyone is willing to purge
1351 * 2. Update the last purgeable record for this user
1353 static int mdd_changelog_user_purge_cb(struct llog_handle *llh,
1354 struct llog_rec_hdr *hdr, void *data)
1356 struct llog_changelog_user_rec *rec;
1357 struct mdd_changelog_user_data *mcud =
1358 (struct mdd_changelog_user_data *)data;
1362 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
1364 rec = (struct llog_changelog_user_rec *)hdr;
1366 mcud->mcud_usercount++;
1368 /* If we have a new endrec for this id, use it for the following
1369 min check instead of its old value */
1370 if (rec->cur_id == mcud->mcud_id)
1371 rec->cur_endrec = max(rec->cur_endrec, mcud->mcud_endrec);
1373 /* Track the minimum referenced record */
1374 if (mcud->mcud_minid == 0 || mcud->mcud_minrec > rec->cur_endrec) {
1375 mcud->mcud_minid = rec->cur_id;
1376 mcud->mcud_minrec = rec->cur_endrec;
1379 if (rec->cur_id != mcud->mcud_id)
1382 /* Update this user's record */
1383 mcud->mcud_found = 1;
1385 /* Special case: unregister this user */
1386 if (mcud->mcud_endrec == MCUD_UNREGISTER) {
1387 struct llog_cookie cookie;
1388 cookie.lgc_lgl = llh->lgh_id;
1389 cookie.lgc_index = hdr->lrh_index;
1390 rc = llog_cat_cancel_records(llh->u.phd.phd_cat_handle,
1393 mcud->mcud_usercount--;
1397 /* Update the endrec */
1398 CDEBUG(D_IOCTL, "Rewriting changelog user %d endrec to "LPU64"\n",
1399 mcud->mcud_id, rec->cur_endrec);
1401 /* hdr+1 is loc of data */
1402 hdr->lrh_len -= sizeof(*hdr) + sizeof(struct llog_rec_tail);
1403 rc = llog_write_rec(llh, hdr, NULL, 0, (void *)(hdr + 1),
1409 static int mdd_changelog_user_purge(struct mdd_device *mdd, int id,
1412 struct mdd_changelog_user_data data;
1413 struct llog_ctxt *ctxt;
1417 CDEBUG(D_IOCTL, "Purge request: id=%d, endrec=%lld\n", id, endrec);
1420 data.mcud_minid = 0;
1421 data.mcud_minrec = 0;
1422 data.mcud_usercount = 0;
1423 data.mcud_endrec = endrec;
1424 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
1425 endrec = mdd->mdd_cl.mc_index;
1426 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
1427 if ((data.mcud_endrec == 0) ||
1428 ((data.mcud_endrec > endrec) &&
1429 (data.mcud_endrec != MCUD_UNREGISTER)))
1430 data.mcud_endrec = endrec;
1432 ctxt = llog_get_context(mdd2obd_dev(mdd),LLOG_CHANGELOG_USER_ORIG_CTXT);
1435 LASSERT(ctxt->loc_handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
1437 rc = llog_cat_process(ctxt->loc_handle, mdd_changelog_user_purge_cb,
1438 (void *)&data, 0, 0);
1439 if ((rc >= 0) && (data.mcud_minrec > 0)) {
1440 CDEBUG(D_IOCTL, "Purging changelog entries up to "LPD64
1441 ", referenced by "CHANGELOG_USER_PREFIX"%d\n",
1442 data.mcud_minrec, data.mcud_minid);
1443 rc = mdd_changelog_llog_cancel(mdd, data.mcud_minrec);
1445 CWARN("Could not determine changelog records to purge; rc=%d\n",
1449 llog_ctxt_put(ctxt);
1451 if (!data.mcud_found) {
1452 CWARN("No entry for user %d. Last changelog reference is "
1453 LPD64" by changelog user %d\n", data.mcud_id,
1454 data.mcud_minrec, data.mcud_minid);
1458 if (!rc && data.mcud_usercount == 0)
1459 /* No more users; turn changelogs off */
1460 rc = mdd_changelog_on(mdd, 0);
1466 * May be called remotely from mdt_iocontrol_handle or locally from
1467 * mdt_iocontrol. Data may be freeform - remote handling doesn't enforce
1468 * an obd_ioctl_data format (but local ioctl handler does).
1470 * \param len - data len
1471 * \param karg - ioctl data, in kernel space
1473 static int mdd_iocontrol(const struct lu_env *env, struct md_device *m,
1474 unsigned int cmd, int len, void *karg)
1476 struct mdd_device *mdd;
1477 struct obd_ioctl_data *data = karg;
1481 mdd = lu2mdd_dev(&m->md_lu_dev);
1483 /* Doesn't use obd_ioctl_data */
1484 if (cmd == OBD_IOC_CHANGELOG_CLEAR) {
1485 struct changelog_setinfo *cs = karg;
1486 rc = mdd_changelog_user_purge(mdd, cs->cs_id, cs->cs_recno);
1490 /* Below ioctls use obd_ioctl_data */
1491 if (len != sizeof(*data)) {
1492 CERROR("Bad ioctl size %d\n", len);
1495 if (data->ioc_version != OBD_IOCTL_VERSION) {
1496 CERROR("Bad magic %x != %x\n", data->ioc_version,
1502 case OBD_IOC_CHANGELOG_REG:
1503 rc = mdd_changelog_user_register(mdd, &data->ioc_u32_1);
1505 case OBD_IOC_CHANGELOG_DEREG:
1506 rc = mdd_changelog_user_purge(mdd, data->ioc_u32_1,
1516 /* type constructor/destructor: mdd_type_init, mdd_type_fini */
1517 LU_TYPE_INIT_FINI(mdd, &mdd_thread_key, &mdd_ucred_key, &mdd_capainfo_key,
1520 const struct md_device_operations mdd_ops = {
1521 .mdo_statfs = mdd_statfs,
1522 .mdo_root_get = mdd_root_get,
1523 .mdo_maxsize_get = mdd_maxsize_get,
1524 .mdo_init_capa_ctxt = mdd_init_capa_ctxt,
1525 .mdo_update_capa_key= mdd_update_capa_key,
1526 .mdo_llog_ctxt_get = mdd_llog_ctxt_get,
1527 .mdo_iocontrol = mdd_iocontrol,
1528 #ifdef HAVE_QUOTA_SUPPORT
1530 .mqo_notify = mdd_quota_notify,
1531 .mqo_setup = mdd_quota_setup,
1532 .mqo_cleanup = mdd_quota_cleanup,
1533 .mqo_recovery = mdd_quota_recovery,
1534 .mqo_check = mdd_quota_check,
1535 .mqo_on = mdd_quota_on,
1536 .mqo_off = mdd_quota_off,
1537 .mqo_setinfo = mdd_quota_setinfo,
1538 .mqo_getinfo = mdd_quota_getinfo,
1539 .mqo_setquota = mdd_quota_setquota,
1540 .mqo_getquota = mdd_quota_getquota,
1541 .mqo_getoinfo = mdd_quota_getoinfo,
1542 .mqo_getoquota = mdd_quota_getoquota,
1543 .mqo_invalidate = mdd_quota_invalidate,
1544 .mqo_finvalidate = mdd_quota_finvalidate
1549 static struct lu_device_type_operations mdd_device_type_ops = {
1550 .ldto_init = mdd_type_init,
1551 .ldto_fini = mdd_type_fini,
1553 .ldto_start = mdd_type_start,
1554 .ldto_stop = mdd_type_stop,
1556 .ldto_device_alloc = mdd_device_alloc,
1557 .ldto_device_free = mdd_device_free,
1559 .ldto_device_init = mdd_device_init,
1560 .ldto_device_fini = mdd_device_fini
1563 static struct lu_device_type mdd_device_type = {
1564 .ldt_tags = LU_DEVICE_MD,
1565 .ldt_name = LUSTRE_MDD_NAME,
1566 .ldt_ops = &mdd_device_type_ops,
1567 .ldt_ctx_tags = LCT_MD_THREAD
1570 /* context key constructor: mdd_key_init */
1571 LU_KEY_INIT(mdd, struct mdd_thread_info);
1573 static void mdd_key_fini(const struct lu_context *ctx,
1574 struct lu_context_key *key, void *data)
1576 struct mdd_thread_info *info = data;
1577 if (info->mti_max_lmm != NULL)
1578 OBD_FREE(info->mti_max_lmm, info->mti_max_lmm_size);
1579 if (info->mti_max_cookie != NULL)
1580 OBD_FREE(info->mti_max_cookie, info->mti_max_cookie_size);
1581 mdd_buf_put(&info->mti_big_buf);
1586 /* context key: mdd_thread_key */
1587 LU_CONTEXT_KEY_DEFINE(mdd, LCT_MD_THREAD);
1589 static struct lu_local_obj_desc llod_capa_key = {
1590 .llod_name = CAPA_KEYS,
1591 .llod_oid = MDD_CAPA_KEYS_OID,
1595 static struct lu_local_obj_desc llod_mdd_orphan = {
1596 .llod_name = orph_index_name,
1597 .llod_oid = MDD_ORPHAN_OID,
1599 .llod_feat = &dt_directory_features,
1602 static struct lu_local_obj_desc llod_mdd_root = {
1603 .llod_name = mdd_root_dir_name,
1604 .llod_oid = MDD_ROOT_INDEX_OID,
1606 .llod_feat = &dt_directory_features,
1609 static int __init mdd_mod_init(void)
1611 struct lprocfs_static_vars lvars;
1612 lprocfs_mdd_init_vars(&lvars);
1614 llo_local_obj_register(&llod_capa_key);
1615 llo_local_obj_register(&llod_mdd_orphan);
1616 llo_local_obj_register(&llod_mdd_root);
1618 return class_register_type(&mdd_obd_device_ops, NULL, lvars.module_vars,
1619 LUSTRE_MDD_NAME, &mdd_device_type);
1622 static void __exit mdd_mod_exit(void)
1624 llo_local_obj_unregister(&llod_capa_key);
1625 llo_local_obj_unregister(&llod_mdd_orphan);
1626 llo_local_obj_unregister(&llod_mdd_root);
1628 class_unregister_type(LUSTRE_MDD_NAME);
1631 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
1632 MODULE_DESCRIPTION("Lustre Meta-data Device Prototype ("LUSTRE_MDD_NAME")");
1633 MODULE_LICENSE("GPL");
1635 cfs_module(mdd, "0.1.0", mdd_mod_init, mdd_mod_exit);