4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2014, Intel Corporation.
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>
43 #define DEBUG_SUBSYSTEM S_MDS
45 #include <linux/module.h>
46 #include <linux/kthread.h>
47 #include <obd_class.h>
48 #include <lustre_ioctl.h>
49 #include <lustre_mds.h>
50 #include <obd_support.h>
51 #include <lu_object.h>
52 #include <lustre_param.h>
53 #include <lustre_fid.h>
54 #include <lustre_nodemap.h>
56 #include "mdd_internal.h"
58 static const struct md_device_operations mdd_ops;
59 static struct lu_device_type mdd_device_type;
61 static const char mdd_root_dir_name[] = "ROOT";
62 static const char mdd_obf_dir_name[] = "fid";
63 static const char mdd_lpf_dir_name[] = "lost+found";
65 /* Slab for MDD object allocation */
66 struct kmem_cache *mdd_object_kmem;
68 static struct lu_kmem_descr mdd_caches[] = {
70 .ckd_cache = &mdd_object_kmem,
71 .ckd_name = "mdd_obj",
72 .ckd_size = sizeof(struct mdd_object)
79 static int mdd_connect_to_next(const struct lu_env *env, struct mdd_device *m,
82 struct obd_connect_data *data = NULL;
83 struct lu_device *lud = mdd2lu_dev(m);
84 struct obd_device *obd;
88 LASSERT(m->mdd_child_exp == NULL);
90 OBD_ALLOC(data, sizeof(*data));
92 GOTO(out, rc = -ENOMEM);
94 obd = class_name2obd(nextdev);
96 CERROR("can't locate next device: %s\n", nextdev);
97 GOTO(out, rc = -ENOTCONN);
100 data->ocd_connect_flags = OBD_CONNECT_VERSION;
101 data->ocd_version = LUSTRE_VERSION_CODE;
103 rc = obd_connect(NULL, &m->mdd_child_exp, obd, &obd->obd_uuid, data, NULL);
105 CERROR("cannot connect to next dev %s (%d)\n", nextdev, rc);
109 lud->ld_site = m->mdd_child_exp->exp_obd->obd_lu_dev->ld_site;
110 LASSERT(lud->ld_site);
111 m->mdd_child = lu2dt_dev(m->mdd_child_exp->exp_obd->obd_lu_dev);
112 m->mdd_bottom = lu2dt_dev(lud->ld_site->ls_bottom_dev);
113 lu_dev_add_linkage(lud->ld_site, lud);
117 OBD_FREE(data, sizeof(*data));
121 static int mdd_init0(const struct lu_env *env, struct mdd_device *mdd,
122 struct lu_device_type *t, struct lustre_cfg *lcfg)
128 /* LU-8040 Set defaults here, before values configs */
129 mdd->mdd_cl.mc_flags = 0; /* off by default */
130 mdd->mdd_cl.mc_mask = CHANGELOG_DEFMASK;
132 dev = lustre_cfg_string(lcfg, 0);
136 mdd->mdd_md_dev.md_lu_dev.ld_obd = class_name2obd(dev);
137 if (mdd->mdd_md_dev.md_lu_dev.ld_obd == NULL)
139 mdd->mdd_md_dev.md_lu_dev.ld_ops = &mdd_lu_ops;
140 mdd->mdd_md_dev.md_ops = &mdd_ops;
142 rc = mdd_connect_to_next(env, mdd, lustre_cfg_string(lcfg, 3));
146 mdd->mdd_atime_diff = MAX_ATIME_DIFF;
147 /* sync permission changes */
148 mdd->mdd_sync_permission = 1;
150 dt_conf_get(env, mdd->mdd_child, &mdd->mdd_dt_conf);
152 /* we are using service name but not mdd obd name
153 * for compatibility reasons.
154 * It is passed from MDT in lustre_cfg[2] buffer */
155 rc = mdd_procfs_init(mdd, lustre_cfg_string(lcfg, 2));
157 obd_disconnect(mdd->mdd_child_exp);
162 static struct lu_device *mdd_device_fini(const struct lu_env *env,
165 struct mdd_device *mdd = lu2mdd_dev(d);
168 lu_dev_del_linkage(d->ld_site, d);
170 mdd_procfs_fini(mdd);
174 static int changelog_init_cb(const struct lu_env *env, struct llog_handle *llh,
175 struct llog_rec_hdr *hdr, void *data)
177 struct mdd_device *mdd = (struct mdd_device *)data;
178 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
180 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
181 LASSERT(rec->cr_hdr.lrh_type == CHANGELOG_REC);
184 "seeing record at index %d/%d/"LPU64" t=%x %.*s in log"
185 DOSTID"\n", hdr->lrh_index, rec->cr_hdr.lrh_index,
186 rec->cr.cr_index, rec->cr.cr_type, rec->cr.cr_namelen,
187 changelog_rec_name(&rec->cr), POSTID(&llh->lgh_id.lgl_oi));
189 mdd->mdd_cl.mc_index = rec->cr.cr_index;
190 return LLOG_PROC_BREAK;
193 static int changelog_user_init_cb(const struct lu_env *env,
194 struct llog_handle *llh,
195 struct llog_rec_hdr *hdr, void *data)
197 struct mdd_device *mdd = (struct mdd_device *)data;
198 struct llog_changelog_user_rec *rec =
199 (struct llog_changelog_user_rec *)hdr;
201 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
202 LASSERT(rec->cur_hdr.lrh_type == CHANGELOG_USER_REC);
204 CDEBUG(D_INFO, "seeing user at index %d/%d id=%d endrec="LPU64
205 " in log "DOSTID"\n", hdr->lrh_index, rec->cur_hdr.lrh_index,
206 rec->cur_id, rec->cur_endrec, POSTID(&llh->lgh_id.lgl_oi));
208 spin_lock(&mdd->mdd_cl.mc_user_lock);
209 mdd->mdd_cl.mc_lastuser = rec->cur_id;
210 if (rec->cur_endrec > mdd->mdd_cl.mc_index)
211 mdd->mdd_cl.mc_index = rec->cur_endrec;
212 spin_unlock(&mdd->mdd_cl.mc_user_lock);
214 return LLOG_PROC_BREAK;
217 static int llog_changelog_cancel_cb(const struct lu_env *env,
218 struct llog_handle *llh,
219 struct llog_rec_hdr *hdr, void *data)
221 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
222 struct llog_cookie cookie;
223 long long endrec = *(long long *)data;
228 /* This is always a (sub)log, not the catalog */
229 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
231 if (rec->cr.cr_index > endrec)
232 /* records are in order, so we're done */
233 RETURN(LLOG_PROC_BREAK);
235 cookie.lgc_lgl = llh->lgh_id;
236 cookie.lgc_index = hdr->lrh_index;
238 /* cancel them one at a time. I suppose we could store up the cookies
239 * and cancel them all at once; probably more efficient, but this is
240 * done as a user call, so who cares... */
241 rc = llog_cat_cancel_records(env, llh->u.phd.phd_cat_handle, 1,
243 RETURN(rc < 0 ? rc : 0);
246 static int llog_changelog_cancel(const struct lu_env *env,
247 struct llog_ctxt *ctxt,
248 struct llog_cookie *cookies, int flags)
250 struct llog_handle *cathandle = ctxt->loc_handle;
255 /* This should only be called with the catalog handle */
256 LASSERT(cathandle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
258 rc = llog_cat_process(env, cathandle, llog_changelog_cancel_cb,
259 (void *)cookies, 0, 0);
261 /* 0 or 1 means we're done */
264 CERROR("%s: cancel idx %u of catalog "DOSTID" rc=%d\n",
265 ctxt->loc_obd->obd_name, cathandle->lgh_last_idx,
266 POSTID(&cathandle->lgh_id.lgl_oi), rc);
271 static struct llog_operations changelog_orig_logops;
274 mdd_changelog_write_header(const struct lu_env *env, struct mdd_device *mdd,
278 mdd_changelog_on(const struct lu_env *env, struct mdd_device *mdd)
282 if ((mdd->mdd_cl.mc_flags & CLM_ON) != 0)
285 LCONSOLE_INFO("%s: changelog on\n", mdd2obd_dev(mdd)->obd_name);
286 if (mdd->mdd_cl.mc_flags & CLM_ERR) {
287 CERROR("Changelogs cannot be enabled due to error "
288 "condition (see %s log).\n",
289 mdd2obd_dev(mdd)->obd_name);
292 spin_lock(&mdd->mdd_cl.mc_lock);
293 mdd->mdd_cl.mc_flags |= CLM_ON;
294 spin_unlock(&mdd->mdd_cl.mc_lock);
295 rc = mdd_changelog_write_header(env, mdd, CLM_START);
301 mdd_changelog_off(const struct lu_env *env, struct mdd_device *mdd)
305 if ((mdd->mdd_cl.mc_flags & CLM_ON) != CLM_ON)
308 LCONSOLE_INFO("%s: changelog off\n", mdd2obd_dev(mdd)->obd_name);
309 rc = mdd_changelog_write_header(env, mdd, CLM_FINI);
310 spin_lock(&mdd->mdd_cl.mc_lock);
311 mdd->mdd_cl.mc_flags &= ~CLM_ON;
312 spin_unlock(&mdd->mdd_cl.mc_lock);
317 static int mdd_changelog_llog_init(const struct lu_env *env,
318 struct mdd_device *mdd)
320 struct obd_device *obd = mdd2obd_dev(mdd);
321 struct llog_ctxt *ctxt = NULL, *uctxt = NULL;
326 /* LU-2844 mdd setup failure should not cause umount oops */
327 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CHANGELOG_INIT))
330 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
331 obd->obd_lvfs_ctxt.dt = mdd->mdd_bottom;
332 rc = llog_setup(env, obd, &obd->obd_olg, LLOG_CHANGELOG_ORIG_CTXT,
333 obd, &changelog_orig_logops);
335 CERROR("%s: changelog llog setup failed: rc = %d\n",
340 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
343 rc = llog_open_create(env, ctxt, &ctxt->loc_handle, NULL,
346 GOTO(out_cleanup, rc);
348 rc = llog_init_handle(env, ctxt->loc_handle, LLOG_F_IS_CAT, NULL);
352 rc = llog_cat_reverse_process(env, ctxt->loc_handle,
353 changelog_init_cb, mdd);
356 CERROR("%s: changelog init failed: rc = %d\n", obd->obd_name,
361 CDEBUG(D_IOCTL, "changelog starting index="LPU64"\n",
362 mdd->mdd_cl.mc_index);
364 /* setup user changelog */
365 rc = llog_setup(env, obd, &obd->obd_olg, LLOG_CHANGELOG_USER_ORIG_CTXT,
366 obd, &changelog_orig_logops);
368 CERROR("%s: changelog users llog setup failed: rc = %d\n",
373 uctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT);
376 rc = llog_open_create(env, uctxt, &uctxt->loc_handle, NULL,
379 GOTO(out_ucleanup, rc);
381 uctxt->loc_handle->lgh_logops->lop_add = llog_cat_add_rec;
382 uctxt->loc_handle->lgh_logops->lop_declare_add = llog_cat_declare_add_rec;
384 rc = llog_init_handle(env, uctxt->loc_handle, LLOG_F_IS_CAT, NULL);
386 GOTO(out_uclose, rc);
388 rc = llog_cat_reverse_process(env, uctxt->loc_handle,
389 changelog_user_init_cb, mdd);
391 CERROR("%s: changelog user init failed: rc = %d\n",
393 GOTO(out_uclose, rc);
396 /* If we have registered users, assume we want changelogs on */
397 if (mdd->mdd_cl.mc_lastuser > 0) {
398 rc = mdd_changelog_on(env, mdd);
400 GOTO(out_uclose, rc);
403 llog_ctxt_put(uctxt);
406 llog_cat_close(env, uctxt->loc_handle);
408 llog_cleanup(env, uctxt);
410 llog_cat_close(env, ctxt->loc_handle);
412 llog_cleanup(env, ctxt);
416 static int mdd_changelog_init(const struct lu_env *env, struct mdd_device *mdd)
418 struct obd_device *obd = mdd2obd_dev(mdd);
421 mdd->mdd_cl.mc_index = 0;
422 spin_lock_init(&mdd->mdd_cl.mc_lock);
423 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
424 spin_lock_init(&mdd->mdd_cl.mc_user_lock);
425 mdd->mdd_cl.mc_lastuser = 0;
427 rc = mdd_changelog_llog_init(env, mdd);
429 CERROR("%s: changelog setup during init failed: rc = %d\n",
431 mdd->mdd_cl.mc_flags |= CLM_ERR;
437 static void mdd_changelog_fini(const struct lu_env *env,
438 struct mdd_device *mdd)
440 struct obd_device *obd = mdd2obd_dev(mdd);
441 struct llog_ctxt *ctxt;
443 mdd->mdd_cl.mc_flags = 0;
445 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
447 llog_cat_close(env, ctxt->loc_handle);
448 llog_cleanup(env, ctxt);
450 ctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT);
452 llog_cat_close(env, ctxt->loc_handle);
453 llog_cleanup(env, ctxt);
457 /** Remove entries with indicies up to and including \a endrec from the
464 mdd_changelog_llog_cancel(const struct lu_env *env, struct mdd_device *mdd,
467 struct obd_device *obd = mdd2obd_dev(mdd);
468 struct llog_ctxt *ctxt;
469 long long unsigned cur;
472 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
476 spin_lock(&mdd->mdd_cl.mc_lock);
477 cur = (long long)mdd->mdd_cl.mc_index;
478 spin_unlock(&mdd->mdd_cl.mc_lock);
482 /* purge to "0" is shorthand for everything */
486 /* If purging all records, write a header entry so we don't have an
487 empty catalog and we're sure to have a valid starting index next
488 time. In case of crash, we just restart with old log so we're
491 /* XXX: transaction is started by llog itself */
492 rc = mdd_changelog_write_header(env, mdd, CLM_PURGE);
497 /* Some records were purged, so reset repeat-access time (so we
498 record new mtime update records, so users can see a file has been
499 changed since the last purge) */
500 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
502 rc = llog_cancel(env, ctxt, (struct llog_cookie *)&endrec, 0);
508 /** Add a CL_MARK record to the changelog
510 * \param markerflags - CLM_*
513 int mdd_changelog_write_header(const struct lu_env *env,
514 struct mdd_device *mdd, int markerflags)
516 struct obd_device *obd = mdd2obd_dev(mdd);
517 struct llog_changelog_rec *rec;
519 struct llog_ctxt *ctxt;
521 int len = strlen(obd->obd_name);
526 if (mdd->mdd_cl.mc_mask & (1 << CL_MARK)) {
527 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
531 reclen = llog_data_len(sizeof(*rec) + len);
532 buf = lu_buf_check_and_alloc(&mdd_env_info(env)->mti_big_buf, reclen);
533 if (buf->lb_buf == NULL)
537 rec->cr.cr_flags = CLF_VERSION;
538 rec->cr.cr_type = CL_MARK;
539 rec->cr.cr_namelen = len;
540 memcpy(changelog_rec_name(&rec->cr), obd->obd_name, rec->cr.cr_namelen);
541 /* Status and action flags */
542 rec->cr.cr_markerflags = mdd->mdd_cl.mc_flags | markerflags;
543 rec->cr_hdr.lrh_len = llog_data_len(changelog_rec_size(&rec->cr) +
545 rec->cr_hdr.lrh_type = CHANGELOG_REC;
546 rec->cr.cr_time = cl_time();
547 spin_lock(&mdd->mdd_cl.mc_lock);
548 rec->cr.cr_index = ++mdd->mdd_cl.mc_index;
549 spin_unlock(&mdd->mdd_cl.mc_lock);
551 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
554 rc = llog_cat_add(env, ctxt->loc_handle, &rec->cr_hdr, NULL);
559 /* assume on or off event; reset repeat-access time */
560 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
565 * Lookup method for "fid" object. Only filenames with correct SEQ:OID format
566 * are valid. We also check if object with passed fid exists or not.
568 static int obf_lookup(const struct lu_env *env, struct md_object *p,
569 const struct lu_name *lname, struct lu_fid *f,
570 struct md_op_spec *spec)
572 char *name = (char *)lname->ln_name;
573 struct mdd_device *mdd = mdo2mdd(p);
574 struct mdd_object *child;
580 sscanf(name, SFID, RFID(f));
581 if (!fid_is_sane(f)) {
582 CWARN("%s: Trying to lookup invalid FID [%s] in %s/%s, FID "
583 "format should be "DFID"\n", mdd2obd_dev(mdd)->obd_name,
584 lname->ln_name, dot_lustre_name, mdd_obf_dir_name,
585 (__u64)FID_SEQ_NORMAL, 1, 0);
586 GOTO(out, rc = -EINVAL);
589 if (!fid_is_norm(f) && !fid_is_igif(f) && !fid_is_root(f) &&
590 !fid_seq_is_dot(f->f_seq)) {
591 CWARN("%s: Trying to lookup invalid FID "DFID" in %s/%s, "
592 "sequence should be >= "LPX64" or within ["LPX64","
593 ""LPX64"].\n", mdd2obd_dev(mdd)->obd_name, PFID(f),
594 dot_lustre_name, mdd_obf_dir_name, (__u64)FID_SEQ_NORMAL,
595 (__u64)FID_SEQ_IGIF, (__u64)FID_SEQ_IGIF_MAX);
596 GOTO(out, rc = -EINVAL);
599 /* Check if object with this fid exists */
600 child = mdd_object_find(env, mdd, f);
602 GOTO(out, rc = PTR_ERR(child));
604 if (mdd_object_exists(child) == 0)
607 mdd_object_put(env, child);
613 static int mdd_dummy_create(const struct lu_env *env,
614 struct md_object *pobj,
615 const struct lu_name *lname,
616 struct md_object *child,
617 struct md_op_spec *spec,
623 static int mdd_dummy_rename(const struct lu_env *env,
624 struct md_object *src_pobj,
625 struct md_object *tgt_pobj,
626 const struct lu_fid *lf,
627 const struct lu_name *lsname,
628 struct md_object *tobj,
629 const struct lu_name *ltname,
635 static int mdd_dummy_link(const struct lu_env *env,
636 struct md_object *tgt_obj,
637 struct md_object *src_obj,
638 const struct lu_name *lname,
644 static int mdd_dummy_unlink(const struct lu_env *env,
645 struct md_object *pobj,
646 struct md_object *cobj,
647 const struct lu_name *lname,
654 static struct md_dir_operations mdd_obf_dir_ops = {
655 .mdo_lookup = obf_lookup,
656 .mdo_create = mdd_dummy_create,
657 .mdo_rename = mdd_dummy_rename,
658 .mdo_link = mdd_dummy_link,
659 .mdo_unlink = mdd_dummy_unlink
662 static struct md_dir_operations mdd_lpf_dir_ops = {
663 .mdo_lookup = mdd_lookup,
664 .mdo_create = mdd_dummy_create,
665 .mdo_rename = mdd_dummy_rename,
666 .mdo_link = mdd_dummy_link,
667 .mdo_unlink = mdd_dummy_unlink
670 static struct md_object *mdo_locate(const struct lu_env *env,
671 struct md_device *md,
672 const struct lu_fid *fid)
674 struct lu_object *obj;
675 struct md_object *mdo;
677 obj = lu_object_find(env, &md->md_lu_dev, fid, NULL);
679 obj = lu_object_locate(obj->lo_header, md->md_lu_dev.ld_type);
680 LASSERT(obj != NULL);
683 mdo = ERR_PTR(PTR_ERR(obj));
688 static int mdd_lpf_setup(const struct lu_env *env, struct mdd_device *m)
690 struct md_object *mdo;
691 struct mdd_object *mdd_lpf;
692 struct lu_fid fid = LU_LPF_FID;
696 rc = mdd_local_file_create(env, m, mdd_object_fid(m->mdd_dot_lustre),
697 mdd_lpf_dir_name, S_IFDIR | S_IRUSR | S_IXUSR,
702 mdo = mdo_locate(env, &m->mdd_md_dev, &fid);
704 RETURN(PTR_ERR(mdo));
706 LASSERT(lu_object_exists(&mdo->mo_lu));
708 mdd_lpf = md2mdd_obj(mdo);
709 mdd_lpf->mod_obj.mo_dir_ops = &mdd_lpf_dir_ops;
710 m->mdd_dot_lustre_objs.mdd_lpf = mdd_lpf;
716 * Create special in-memory "fid" object for open-by-fid.
718 static int mdd_obf_setup(const struct lu_env *env, struct mdd_device *m)
720 struct md_object *mdo;
721 struct mdd_object *mdd_obf;
722 struct lu_fid fid = LU_OBF_FID;
725 rc = mdd_local_file_create(env, m, mdd_object_fid(m->mdd_dot_lustre),
726 mdd_obf_dir_name, S_IFDIR | S_IXUSR, &fid);
730 mdo = mdo_locate(env, &m->mdd_md_dev, &fid);
732 RETURN(PTR_ERR(mdo));
734 LASSERT(lu_object_exists(&mdo->mo_lu));
736 mdd_obf = md2mdd_obj(mdo);
737 mdd_obf->mod_obj.mo_dir_ops = &mdd_obf_dir_ops;
738 m->mdd_dot_lustre_objs.mdd_obf = mdd_obf;
743 static void mdd_dot_lustre_cleanup(const struct lu_env *env,
744 struct mdd_device *m)
746 if (m->mdd_dot_lustre_objs.mdd_lpf != NULL) {
747 mdd_object_put(env, m->mdd_dot_lustre_objs.mdd_lpf);
748 m->mdd_dot_lustre_objs.mdd_lpf = NULL;
750 if (m->mdd_dot_lustre_objs.mdd_obf != NULL) {
751 mdd_object_put(env, m->mdd_dot_lustre_objs.mdd_obf);
752 m->mdd_dot_lustre_objs.mdd_obf = NULL;
754 if (m->mdd_dot_lustre != NULL) {
755 mdd_object_put(env, m->mdd_dot_lustre);
756 m->mdd_dot_lustre = NULL;
760 /** Setup ".lustre" directory object */
761 static int mdd_dot_lustre_setup(const struct lu_env *env, struct mdd_device *m)
763 struct md_object *mdo;
768 /* Create ".lustre" directory in ROOT. */
769 fid = LU_DOT_LUSTRE_FID;
770 rc = mdd_local_file_create(env, m, &m->mdd_root_fid,
772 S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO,
776 mdo = mdo_locate(env, &m->mdd_md_dev, &fid);
778 RETURN(PTR_ERR(mdo));
779 LASSERT(lu_object_exists(&mdo->mo_lu));
781 m->mdd_dot_lustre = md2mdd_obj(mdo);
783 rc = mdd_obf_setup(env, m);
785 CERROR("%s: error initializing \"fid\" object: rc = %d.\n",
786 mdd2obd_dev(m)->obd_name, rc);
790 rc = mdd_lpf_setup(env, m);
792 CERROR("%s: error initializing \"lost+found\": rc = %d.\n",
793 mdd2obd_dev(m)->obd_name, rc);
800 mdd_dot_lustre_cleanup(env, m);
806 static struct llog_operations hsm_actions_logops;
809 * set llog methods and create LLOG_AGENT_ORIG_CTXT llog
810 * object in obd_device
812 static int mdd_hsm_actions_llog_init(const struct lu_env *env,
813 struct mdd_device *m)
815 struct obd_device *obd = mdd2obd_dev(m);
816 struct llog_ctxt *ctxt = NULL;
820 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
821 obd->obd_lvfs_ctxt.dt = m->mdd_bottom;
823 rc = llog_setup(env, obd, &obd->obd_olg, LLOG_AGENT_ORIG_CTXT,
824 obd, &hsm_actions_logops);
826 CERROR("%s: hsm actions llog setup failed: rc = %d\n",
831 ctxt = llog_get_context(obd, LLOG_AGENT_ORIG_CTXT);
834 rc = llog_open_create(env, ctxt, &ctxt->loc_handle, NULL,
837 CERROR("%s: hsm actions llog open_create failed: rc = %d\n",
839 GOTO(out_cleanup, rc);
842 rc = llog_init_handle(env, ctxt->loc_handle, LLOG_F_IS_CAT, NULL);
850 llog_cat_close(env, ctxt->loc_handle);
851 ctxt->loc_handle = NULL;
853 llog_cleanup(env, ctxt);
859 * cleanup the context created by llog_setup_named()
861 static int mdd_hsm_actions_llog_fini(const struct lu_env *env,
862 struct mdd_device *m)
864 struct obd_device *obd = mdd2obd_dev(m);
865 struct llog_ctxt *lctxt;
868 lctxt = llog_get_context(obd, LLOG_AGENT_ORIG_CTXT);
870 llog_cat_close(env, lctxt->loc_handle);
871 lctxt->loc_handle = NULL;
872 llog_cleanup(env, lctxt);
878 static void mdd_device_shutdown(const struct lu_env *env, struct mdd_device *m,
879 struct lustre_cfg *cfg)
881 mdd_generic_thread_stop(&m->mdd_orph_cleanup_thread);
882 lfsck_degister(env, m->mdd_bottom);
883 mdd_hsm_actions_llog_fini(env, m);
884 mdd_changelog_fini(env, m);
885 orph_index_fini(env, m);
886 mdd_dot_lustre_cleanup(env, m);
887 nodemap_fs_fini(env, mdd2obd_dev(m));
888 if (m->mdd_los != NULL) {
889 local_oid_storage_fini(env, m->mdd_los);
892 lu_site_purge(env, mdd2lu_dev(m)->ld_site, ~0);
894 if (m->mdd_child_exp)
895 obd_disconnect(m->mdd_child_exp);
898 static int mdd_process_config(const struct lu_env *env,
899 struct lu_device *d, struct lustre_cfg *cfg)
901 struct mdd_device *m = lu2mdd_dev(d);
902 struct dt_device *dt = m->mdd_child;
903 struct lu_device *next = &dt->dd_lu_dev;
907 switch (cfg->lcfg_command) {
909 struct obd_device *obd = mdd2obd_dev(m);
911 rc = class_process_proc_param(PARAM_MDD, obd->obd_vars, cfg, m);
912 if (rc > 0 || rc == -ENOSYS)
913 /* we don't understand; pass it on */
914 rc = next->ld_ops->ldo_process_config(env, next, cfg);
918 rc = next->ld_ops->ldo_process_config(env, next, cfg);
921 dt_conf_get(env, dt, &m->mdd_dt_conf);
924 rc = next->ld_ops->ldo_process_config(env, next, cfg);
925 lu_dev_del_linkage(d->ld_site, d);
926 mdd_device_shutdown(env, m, cfg);
929 rc = next->ld_ops->ldo_process_config(env, next, cfg);
936 static int mdd_recovery_complete(const struct lu_env *env,
939 struct mdd_device *mdd = lu2mdd_dev(d);
940 struct lu_device *next;
944 LASSERT(mdd != NULL);
945 next = &mdd->mdd_child->dd_lu_dev;
947 /* XXX: orphans handling. */
948 mdd_orphan_cleanup(env, mdd);
949 rc = next->ld_ops->ldo_recovery_complete(env, next);
954 int mdd_local_file_create(const struct lu_env *env, struct mdd_device *mdd,
955 const struct lu_fid *pfid, const char *name,
956 __u32 mode, struct lu_fid *fid)
958 struct dt_object *parent, *dto;
963 LASSERT(!fid_is_zero(pfid));
964 parent = dt_locate(env, mdd->mdd_bottom, pfid);
965 if (unlikely(IS_ERR(parent)))
966 RETURN(PTR_ERR(parent));
968 /* create local file/dir, if @fid is passed then try to use it */
969 if (fid_is_zero(fid))
970 dto = local_file_find_or_create(env, mdd->mdd_los, parent,
973 dto = local_file_find_or_create_with_fid(env, mdd->mdd_bottom,
977 GOTO(out_put, rc = PTR_ERR(dto));
978 *fid = *lu_object_fid(&dto->do_lu);
979 /* since stack is not fully set up the local_storage uses own stack
980 * and we should drop its object from cache */
981 lu_object_put_nocache(env, &dto->do_lu);
984 lu_object_put(env, &parent->do_lu);
988 static int mdd_lfsck_out_notify(const struct lu_env *env, void *data,
989 enum lfsck_events event)
994 static int mdd_prepare(const struct lu_env *env,
995 struct lu_device *pdev,
996 struct lu_device *cdev)
998 struct mdd_device *mdd = lu2mdd_dev(cdev);
999 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
1005 rc = next->ld_ops->ldo_prepare(env, cdev, next);
1009 /* Setup local dirs */
1010 fid.f_seq = FID_SEQ_LOCAL_NAME;
1013 rc = local_oid_storage_init(env, mdd->mdd_bottom, &fid,
1018 rc = dt_root_get(env, mdd->mdd_child, &mdd->mdd_local_root_fid);
1023 if (mdd_seq_site(mdd)->ss_node_id == 0) {
1024 rc = mdd_local_file_create(env, mdd, &mdd->mdd_local_root_fid,
1025 mdd_root_dir_name, S_IFDIR |
1026 S_IRUGO | S_IWUSR | S_IXUGO, &fid);
1028 CERROR("%s: create root fid failed: rc = %d\n",
1029 mdd2obd_dev(mdd)->obd_name, rc);
1033 mdd->mdd_root_fid = fid;
1034 rc = mdd_dot_lustre_setup(env, mdd);
1036 CERROR("%s: initializing .lustre failed: rc = %d\n",
1037 mdd2obd_dev(mdd)->obd_name, rc);
1041 /* Normal client usually send root access to MDT0 directly,
1042 * the root FID on non-MDT0 will only be used by echo client. */
1043 mdd->mdd_root_fid = fid;
1046 rc = orph_index_init(env, mdd);
1050 rc = mdd_changelog_init(env, mdd);
1052 CERROR("%s: failed to initialize changelog: rc = %d\n",
1053 mdd2obd_dev(mdd)->obd_name, rc);
1057 rc = mdd_hsm_actions_llog_init(env, mdd);
1059 GOTO(out_changelog, rc);
1061 rc = nodemap_fs_init(env, mdd->mdd_bottom, mdd2obd_dev(mdd),
1066 rc = lfsck_register(env, mdd->mdd_bottom, mdd->mdd_child,
1067 mdd2obd_dev(mdd), mdd_lfsck_out_notify,
1070 CERROR("%s: failed to initialize lfsck: rc = %d\n",
1071 mdd2obd_dev(mdd)->obd_name, rc);
1072 GOTO(out_nodemap, rc);
1078 nodemap_fs_fini(env, mdd2obd_dev(mdd));
1080 mdd_hsm_actions_llog_fini(env, mdd);
1082 mdd_changelog_fini(env, mdd);
1084 orph_index_fini(env, mdd);
1086 if (mdd_seq_site(mdd)->ss_node_id == 0)
1087 mdd_dot_lustre_cleanup(env, mdd);
1089 local_oid_storage_fini(env, mdd->mdd_los);
1090 mdd->mdd_los = NULL;
1095 const struct lu_device_operations mdd_lu_ops = {
1096 .ldo_object_alloc = mdd_object_alloc,
1097 .ldo_process_config = mdd_process_config,
1098 .ldo_recovery_complete = mdd_recovery_complete,
1099 .ldo_prepare = mdd_prepare,
1102 static int mdd_root_get(const struct lu_env *env,
1103 struct md_device *m, struct lu_fid *f)
1105 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1108 *f = mdd->mdd_root_fid;
1113 * No permission check is needed.
1115 static int mdd_statfs(const struct lu_env *env, struct md_device *m,
1116 struct obd_statfs *sfs)
1118 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1123 rc = mdd_child_ops(mdd)->dt_statfs(env, mdd->mdd_child, sfs);
1125 sfs->os_namelen = min_t(__u32, sfs->os_namelen, NAME_MAX);
1130 static int mdd_maxeasize_get(const struct lu_env *env, struct md_device *m,
1133 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1136 *easize = mdd->mdd_dt_conf.ddp_max_ea_size;
1141 static int mdd_llog_ctxt_get(const struct lu_env *env, struct md_device *m,
1144 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1146 *h = llog_group_get_ctxt(&mdd2obd_dev(mdd)->obd_olg, idx);
1147 return (*h == NULL ? -ENOENT : 0);
1150 static struct lu_device *mdd_device_free(const struct lu_env *env,
1151 struct lu_device *lu)
1153 struct mdd_device *m = lu2mdd_dev(lu);
1156 LASSERT(atomic_read(&lu->ld_ref) == 0);
1157 md_device_fini(&m->mdd_md_dev);
1162 static struct lu_device *mdd_device_alloc(const struct lu_env *env,
1163 struct lu_device_type *t,
1164 struct lustre_cfg *lcfg)
1166 struct lu_device *l;
1167 struct mdd_device *m;
1171 l = ERR_PTR(-ENOMEM);
1176 md_device_init(&m->mdd_md_dev, t);
1177 rc = mdd_init0(env, m, t, lcfg);
1179 mdd_device_free(env, l);
1188 * we use exports to track all mdd users
1190 static int mdd_obd_connect(const struct lu_env *env, struct obd_export **exp,
1191 struct obd_device *obd, struct obd_uuid *cluuid,
1192 struct obd_connect_data *data, void *localdata)
1194 struct mdd_device *mdd = lu2mdd_dev(obd->obd_lu_dev);
1195 struct lustre_handle conn;
1199 CDEBUG(D_CONFIG, "connect #%d\n", mdd->mdd_connects);
1201 rc = class_connect(&conn, obd, cluuid);
1205 *exp = class_conn2export(&conn);
1207 /* Why should there ever be more than 1 connect? */
1208 LASSERT(mdd->mdd_connects == 0);
1209 mdd->mdd_connects++;
1215 * once last export (we don't count self-export) disappeared
1216 * mdd can be released
1218 static int mdd_obd_disconnect(struct obd_export *exp)
1220 struct obd_device *obd = exp->exp_obd;
1221 struct mdd_device *mdd = lu2mdd_dev(obd->obd_lu_dev);
1222 int rc, release = 0;
1225 mdd->mdd_connects--;
1226 if (mdd->mdd_connects == 0)
1229 rc = class_disconnect(exp);
1231 if (rc == 0 && release)
1232 class_manual_cleanup(obd);
1236 static int mdd_obd_get_info(const struct lu_env *env, struct obd_export *exp,
1237 __u32 keylen, void *key, __u32 *vallen, void *val)
1241 if (KEY_IS(KEY_OSP_CONNECTED)) {
1242 struct obd_device *obd = exp->exp_obd;
1243 struct mdd_device *mdd;
1245 if (!obd->obd_set_up || obd->obd_stopping)
1248 mdd = lu2mdd_dev(obd->obd_lu_dev);
1250 rc = obd_get_info(env, mdd->mdd_child_exp, keylen, key, vallen,
1258 static int mdd_obd_set_info_async(const struct lu_env *env,
1259 struct obd_export *exp,
1260 __u32 keylen, void *key,
1261 __u32 vallen, void *val,
1262 struct ptlrpc_request_set *set)
1264 struct obd_device *obd = exp->exp_obd;
1265 struct mdd_device *mdd;
1268 if (!obd->obd_set_up || obd->obd_stopping)
1271 mdd = lu2mdd_dev(obd->obd_lu_dev);
1273 rc = obd_set_info_async(env, mdd->mdd_child_exp, keylen, key,
1278 static struct obd_ops mdd_obd_device_ops = {
1279 .o_owner = THIS_MODULE,
1280 .o_connect = mdd_obd_connect,
1281 .o_disconnect = mdd_obd_disconnect,
1282 .o_get_info = mdd_obd_get_info,
1283 .o_set_info_async = mdd_obd_set_info_async,
1286 static int mdd_changelog_user_register(const struct lu_env *env,
1287 struct mdd_device *mdd, int *id)
1289 struct llog_ctxt *ctxt;
1290 struct llog_changelog_user_rec *rec;
1294 ctxt = llog_get_context(mdd2obd_dev(mdd),
1295 LLOG_CHANGELOG_USER_ORIG_CTXT);
1301 llog_ctxt_put(ctxt);
1305 /* Assume we want it on since somebody registered */
1306 rc = mdd_changelog_on(env, mdd);
1310 rec->cur_hdr.lrh_len = sizeof(*rec);
1311 rec->cur_hdr.lrh_type = CHANGELOG_USER_REC;
1312 spin_lock(&mdd->mdd_cl.mc_user_lock);
1313 if (mdd->mdd_cl.mc_lastuser == (unsigned int)(-1)) {
1314 spin_unlock(&mdd->mdd_cl.mc_user_lock);
1315 CERROR("Maximum number of changelog users exceeded!\n");
1316 GOTO(out, rc = -EOVERFLOW);
1318 *id = rec->cur_id = ++mdd->mdd_cl.mc_lastuser;
1319 rec->cur_endrec = mdd->mdd_cl.mc_index;
1320 spin_unlock(&mdd->mdd_cl.mc_user_lock);
1322 rc = llog_cat_add(env, ctxt->loc_handle, &rec->cur_hdr, NULL);
1324 CDEBUG(D_IOCTL, "Registered changelog user %d\n", *id);
1327 llog_ctxt_put(ctxt);
1331 struct mdd_changelog_user_data {
1332 __u64 mcud_endrec; /**< purge record for this user */
1333 __u64 mcud_minrec; /**< lowest changelog recno still referenced */
1335 __u32 mcud_minid; /**< user id with lowest rec reference */
1336 __u32 mcud_usercount;
1337 unsigned int mcud_found:1;
1339 #define MCUD_UNREGISTER -1LL
1342 * 1. Find the smallest record everyone is willing to purge
1343 * 2. Update the last purgeable record for this user
1345 static int mdd_changelog_user_purge_cb(const struct lu_env *env,
1346 struct llog_handle *llh,
1347 struct llog_rec_hdr *hdr, void *data)
1349 struct llog_changelog_user_rec *rec;
1350 struct mdd_changelog_user_data *mcud = data;
1355 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
1357 rec = (struct llog_changelog_user_rec *)hdr;
1359 mcud->mcud_usercount++;
1361 /* If we have a new endrec for this id, use it for the following
1362 min check instead of its old value */
1363 if (rec->cur_id == mcud->mcud_id)
1364 rec->cur_endrec = max(rec->cur_endrec, mcud->mcud_endrec);
1366 /* Track the minimum referenced record */
1367 if (mcud->mcud_minid == 0 || mcud->mcud_minrec > rec->cur_endrec) {
1368 mcud->mcud_minid = rec->cur_id;
1369 mcud->mcud_minrec = rec->cur_endrec;
1372 if (rec->cur_id != mcud->mcud_id)
1375 /* Update this user's record */
1376 mcud->mcud_found = 1;
1378 /* Special case: unregister this user */
1379 if (mcud->mcud_endrec == MCUD_UNREGISTER) {
1380 struct llog_cookie cookie;
1382 cookie.lgc_lgl = llh->lgh_id;
1383 cookie.lgc_index = hdr->lrh_index;
1385 rc = llog_cat_cancel_records(env, llh->u.phd.phd_cat_handle,
1388 mcud->mcud_usercount--;
1393 /* Update the endrec */
1394 CDEBUG(D_IOCTL, "Rewriting changelog user %d endrec to "LPU64"\n",
1395 mcud->mcud_id, rec->cur_endrec);
1397 rc = llog_write(env, llh, hdr, hdr->lrh_index);
1402 static int mdd_changelog_user_purge(const struct lu_env *env,
1403 struct mdd_device *mdd, int id,
1406 struct mdd_changelog_user_data data;
1407 struct llog_ctxt *ctxt;
1411 CDEBUG(D_IOCTL, "Purge request: id=%d, endrec=%lld\n", id, endrec);
1414 data.mcud_minid = 0;
1415 data.mcud_minrec = 0;
1416 data.mcud_usercount = 0;
1417 data.mcud_endrec = endrec;
1418 spin_lock(&mdd->mdd_cl.mc_lock);
1419 endrec = mdd->mdd_cl.mc_index;
1420 spin_unlock(&mdd->mdd_cl.mc_lock);
1421 if ((data.mcud_endrec == 0) ||
1422 ((data.mcud_endrec > endrec) &&
1423 (data.mcud_endrec != MCUD_UNREGISTER)))
1424 data.mcud_endrec = endrec;
1426 ctxt = llog_get_context(mdd2obd_dev(mdd),
1427 LLOG_CHANGELOG_USER_ORIG_CTXT);
1431 LASSERT(ctxt->loc_handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
1433 rc = llog_cat_process(env, ctxt->loc_handle,
1434 mdd_changelog_user_purge_cb, (void *)&data,
1436 if ((rc >= 0) && (data.mcud_minrec > 0)) {
1437 CDEBUG(D_IOCTL, "Purging changelog entries up to "LPD64
1438 ", referenced by "CHANGELOG_USER_PREFIX"%d\n",
1439 data.mcud_minrec, data.mcud_minid);
1440 rc = mdd_changelog_llog_cancel(env, mdd, data.mcud_minrec);
1442 CWARN("Could not determine changelog records to purge; rc=%d\n",
1446 llog_ctxt_put(ctxt);
1448 if (!data.mcud_found) {
1449 CWARN("No entry for user %d. Last changelog reference is "
1450 LPD64" by changelog user %d\n", data.mcud_id,
1451 data.mcud_minrec, data.mcud_minid);
1455 if (!rc && data.mcud_usercount == 0)
1456 /* No more users; turn changelogs off */
1457 rc = mdd_changelog_off(env, mdd);
1463 * May be called remotely from mdt_iocontrol_handle or locally from
1464 * mdt_iocontrol. Data may be freeform - remote handling doesn't enforce
1465 * an obd_ioctl_data format (but local ioctl handler does).
1467 * \param len - data len
1468 * \param karg - ioctl data, in kernel space
1470 static int mdd_iocontrol(const struct lu_env *env, struct md_device *m,
1471 unsigned int cmd, int len, void *karg)
1473 struct mdd_device *mdd;
1474 struct obd_ioctl_data *data = karg;
1478 mdd = lu2mdd_dev(&m->md_lu_dev);
1480 /* Doesn't use obd_ioctl_data */
1482 case OBD_IOC_CHANGELOG_CLEAR: {
1483 struct changelog_setinfo *cs = karg;
1484 rc = mdd_changelog_user_purge(env, mdd, cs->cs_id,
1488 case OBD_IOC_GET_MNTOPT: {
1489 mntopt_t *mntopts = (mntopt_t *)karg;
1490 *mntopts = mdd->mdd_dt_conf.ddp_mntopts;
1493 case OBD_IOC_START_LFSCK: {
1494 rc = lfsck_start(env, mdd->mdd_bottom,
1495 (struct lfsck_start_param *)karg);
1498 case OBD_IOC_STOP_LFSCK: {
1499 rc = lfsck_stop(env, mdd->mdd_bottom,
1500 (struct lfsck_stop *)karg);
1503 case OBD_IOC_QUERY_LFSCK: {
1504 rc = lfsck_query(env, mdd->mdd_bottom, NULL, NULL,
1505 (struct lfsck_query *)karg);
1510 /* Below ioctls use obd_ioctl_data */
1511 if (len != sizeof(*data)) {
1512 CERROR("Bad ioctl size %d\n", len);
1515 if (data->ioc_version != OBD_IOCTL_VERSION) {
1516 CERROR("Bad magic %x != %x\n", data->ioc_version,
1522 case OBD_IOC_CHANGELOG_REG:
1523 rc = mdd_changelog_user_register(env, mdd, &data->ioc_u32_1);
1525 case OBD_IOC_CHANGELOG_DEREG:
1526 rc = mdd_changelog_user_purge(env, mdd, data->ioc_u32_1,
1536 /* type constructor/destructor: mdd_type_init, mdd_type_fini */
1537 LU_TYPE_INIT_FINI(mdd, &mdd_thread_key);
1539 static const struct md_device_operations mdd_ops = {
1540 .mdo_statfs = mdd_statfs,
1541 .mdo_root_get = mdd_root_get,
1542 .mdo_llog_ctxt_get = mdd_llog_ctxt_get,
1543 .mdo_iocontrol = mdd_iocontrol,
1544 .mdo_maxeasize_get = mdd_maxeasize_get,
1547 static struct lu_device_type_operations mdd_device_type_ops = {
1548 .ldto_init = mdd_type_init,
1549 .ldto_fini = mdd_type_fini,
1551 .ldto_start = mdd_type_start,
1552 .ldto_stop = mdd_type_stop,
1554 .ldto_device_alloc = mdd_device_alloc,
1555 .ldto_device_free = mdd_device_free,
1557 .ldto_device_fini = mdd_device_fini
1560 static struct lu_device_type mdd_device_type = {
1561 .ldt_tags = LU_DEVICE_MD,
1562 .ldt_name = LUSTRE_MDD_NAME,
1563 .ldt_ops = &mdd_device_type_ops,
1564 .ldt_ctx_tags = LCT_MD_THREAD
1567 /* context key constructor: mdd_key_init */
1568 LU_KEY_INIT(mdd, struct mdd_thread_info);
1570 static void mdd_key_fini(const struct lu_context *ctx,
1571 struct lu_context_key *key, void *data)
1573 struct mdd_thread_info *info = data;
1575 lu_buf_free(&info->mti_big_buf);
1576 lu_buf_free(&info->mti_link_buf);
1581 /* context key: mdd_thread_key */
1582 LU_CONTEXT_KEY_DEFINE(mdd, LCT_MD_THREAD);
1584 int mdd_generic_thread_start(struct mdd_generic_thread *thread,
1585 int (*func)(void *), void *data, char *name)
1587 struct task_struct *task;
1589 LASSERT(thread->mgt_init == false);
1590 init_completion(&thread->mgt_started);
1591 init_completion(&thread->mgt_finished);
1592 thread->mgt_data = data;
1593 thread->mgt_abort = false;
1594 thread->mgt_init = true;
1596 task = kthread_run(func, thread, name);
1598 complete(&thread->mgt_finished);
1599 return PTR_ERR(task);
1601 wait_for_completion(&thread->mgt_started);
1605 void mdd_generic_thread_stop(struct mdd_generic_thread *thread)
1607 if (thread->mgt_init == true) {
1608 thread->mgt_abort = true;
1609 wait_for_completion(&thread->mgt_finished);
1613 static int __init mdd_init(void)
1617 rc = lu_kmem_init(mdd_caches);
1621 changelog_orig_logops = llog_osd_ops;
1622 changelog_orig_logops.lop_cancel = llog_changelog_cancel;
1623 changelog_orig_logops.lop_add = llog_cat_add_rec;
1624 changelog_orig_logops.lop_declare_add = llog_cat_declare_add_rec;
1626 hsm_actions_logops = llog_osd_ops;
1627 hsm_actions_logops.lop_add = llog_cat_add_rec;
1628 hsm_actions_logops.lop_declare_add = llog_cat_declare_add_rec;
1630 rc = class_register_type(&mdd_obd_device_ops, NULL, true, NULL,
1631 LUSTRE_MDD_NAME, &mdd_device_type);
1633 lu_kmem_fini(mdd_caches);
1637 static void __exit mdd_exit(void)
1639 class_unregister_type(LUSTRE_MDD_NAME);
1640 lu_kmem_fini(mdd_caches);
1643 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1644 MODULE_DESCRIPTION("Lustre Meta-data Device Driver ("LUSTRE_MDD_NAME")");
1645 MODULE_VERSION(LUSTRE_VERSION_STRING);
1646 MODULE_LICENSE("GPL");
1648 module_init(mdd_init);
1649 module_exit(mdd_exit);