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, 2012, 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 <obd_class.h>
47 #include <lustre_mds.h>
48 #include <obd_support.h>
49 #include <lu_object.h>
50 #include <lustre_param.h>
51 #include <lustre_fid.h>
53 #include "mdd_internal.h"
55 const struct md_device_operations mdd_ops;
56 static struct lu_device_type mdd_device_type;
58 static const char mdd_root_dir_name[] = "ROOT";
59 static const char mdd_obf_dir_name[] = "fid";
61 /* Slab for MDD object allocation */
62 cfs_mem_cache_t *mdd_object_kmem;
64 static struct lu_kmem_descr mdd_caches[] = {
66 .ckd_cache = &mdd_object_kmem,
67 .ckd_name = "mdd_obj",
68 .ckd_size = sizeof(struct mdd_object)
75 static int mdd_connect_to_next(const struct lu_env *env, struct mdd_device *m,
78 struct obd_connect_data *data = NULL;
79 struct lu_device *lud = mdd2lu_dev(m);
80 struct obd_device *obd;
84 LASSERT(m->mdd_child_exp == NULL);
86 OBD_ALLOC(data, sizeof(*data));
88 GOTO(out, rc = -ENOMEM);
90 obd = class_name2obd(nextdev);
92 CERROR("can't locate next device: %s\n", nextdev);
93 GOTO(out, rc = -ENOTCONN);
96 data->ocd_connect_flags = OBD_CONNECT_VERSION;
97 data->ocd_version = LUSTRE_VERSION_CODE;
99 rc = obd_connect(NULL, &m->mdd_child_exp, obd, &obd->obd_uuid, data, NULL);
101 CERROR("cannot connect to next dev %s (%d)\n", nextdev, rc);
105 lud->ld_site = m->mdd_child_exp->exp_obd->obd_lu_dev->ld_site;
106 LASSERT(lud->ld_site);
107 m->mdd_child = lu2dt_dev(m->mdd_child_exp->exp_obd->obd_lu_dev);
108 m->mdd_bottom = lu2dt_dev(lud->ld_site->ls_bottom_dev);
109 lu_dev_add_linkage(lud->ld_site, lud);
113 OBD_FREE(data, sizeof(*data));
117 static int mdd_init0(const struct lu_env *env, struct mdd_device *mdd,
118 struct lu_device_type *t, struct lustre_cfg *lcfg)
123 mdd->mdd_md_dev.md_lu_dev.ld_ops = &mdd_lu_ops;
124 mdd->mdd_md_dev.md_ops = &mdd_ops;
126 rc = mdd_connect_to_next(env, mdd, lustre_cfg_string(lcfg, 3));
130 mdd->mdd_atime_diff = MAX_ATIME_DIFF;
131 /* sync permission changes */
132 mdd->mdd_sync_permission = 1;
134 dt_conf_get(env, mdd->mdd_child, &mdd->mdd_dt_conf);
136 /* we are using service name but not mdd obd name
137 * for compatibility reasons.
138 * It is passed from MDT in lustre_cfg[2] buffer */
139 rc = mdd_procfs_init(mdd, lustre_cfg_string(lcfg, 2));
141 obd_disconnect(mdd->mdd_child_exp);
146 static struct lu_device *mdd_device_fini(const struct lu_env *env,
149 struct mdd_device *mdd = lu2mdd_dev(d);
153 lu_dev_del_linkage(d->ld_site, d);
155 rc = mdd_procfs_fini(mdd);
157 CERROR("proc fini error %d \n", rc);
163 static int changelog_init_cb(const struct lu_env *env, struct llog_handle *llh,
164 struct llog_rec_hdr *hdr, void *data)
166 struct mdd_device *mdd = (struct mdd_device *)data;
167 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
169 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
170 LASSERT(rec->cr_hdr.lrh_type == CHANGELOG_REC);
173 "seeing record at index %d/%d/"LPU64" t=%x %.*s in log"
174 DOSTID"\n", hdr->lrh_index, rec->cr_hdr.lrh_index,
175 rec->cr.cr_index, rec->cr.cr_type, rec->cr.cr_namelen,
176 rec->cr.cr_name, POSTID(&llh->lgh_id.lgl_oi));
178 mdd->mdd_cl.mc_index = rec->cr.cr_index;
179 return LLOG_PROC_BREAK;
182 static int changelog_user_init_cb(const struct lu_env *env,
183 struct llog_handle *llh,
184 struct llog_rec_hdr *hdr, void *data)
186 struct mdd_device *mdd = (struct mdd_device *)data;
187 struct llog_changelog_user_rec *rec =
188 (struct llog_changelog_user_rec *)hdr;
190 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
191 LASSERT(rec->cur_hdr.lrh_type == CHANGELOG_USER_REC);
193 CDEBUG(D_INFO, "seeing user at index %d/%d id=%d endrec="LPU64
194 " in log "DOSTID"\n", hdr->lrh_index, rec->cur_hdr.lrh_index,
195 rec->cur_id, rec->cur_endrec, POSTID(&llh->lgh_id.lgl_oi));
197 spin_lock(&mdd->mdd_cl.mc_user_lock);
198 mdd->mdd_cl.mc_lastuser = rec->cur_id;
199 spin_unlock(&mdd->mdd_cl.mc_user_lock);
201 return LLOG_PROC_BREAK;
204 static int llog_changelog_cancel_cb(const struct lu_env *env,
205 struct llog_handle *llh,
206 struct llog_rec_hdr *hdr, void *data)
208 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
209 struct llog_cookie cookie;
210 long long endrec = *(long long *)data;
215 /* This is always a (sub)log, not the catalog */
216 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
218 if (rec->cr.cr_index > endrec)
219 /* records are in order, so we're done */
220 RETURN(LLOG_PROC_BREAK);
222 cookie.lgc_lgl = llh->lgh_id;
223 cookie.lgc_index = hdr->lrh_index;
225 /* cancel them one at a time. I suppose we could store up the cookies
226 * and cancel them all at once; probably more efficient, but this is
227 * done as a user call, so who cares... */
228 rc = llog_cat_cancel_records(env, llh->u.phd.phd_cat_handle, 1,
230 RETURN(rc < 0 ? rc : 0);
233 static int llog_changelog_cancel(const struct lu_env *env,
234 struct llog_ctxt *ctxt,
235 struct lov_stripe_md *lsm, int count,
236 struct llog_cookie *cookies, int flags)
238 struct llog_handle *cathandle = ctxt->loc_handle;
243 /* This should only be called with the catalog handle */
244 LASSERT(cathandle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
246 rc = llog_cat_process(env, cathandle, llog_changelog_cancel_cb,
247 (void *)cookies, 0, 0);
249 /* 0 or 1 means we're done */
252 CERROR("%s: cancel idx %u of catalog "DOSTID" rc=%d\n",
253 ctxt->loc_obd->obd_name, cathandle->lgh_last_idx,
254 POSTID(&cathandle->lgh_id.lgl_oi), rc);
259 static struct llog_operations changelog_orig_logops;
261 int mdd_changelog_on(const struct lu_env *env, struct mdd_device *mdd, int on);
263 static int mdd_changelog_llog_init(const struct lu_env *env,
264 struct mdd_device *mdd)
266 struct obd_device *obd = mdd2obd_dev(mdd);
267 struct llog_ctxt *ctxt = NULL, *uctxt = NULL;
272 /* LU-2844 mdd setup failure should not cause umount oops */
273 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CHANGELOG_INIT))
276 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
277 obd->obd_lvfs_ctxt.dt = mdd->mdd_bottom;
278 rc = llog_setup(env, obd, &obd->obd_olg, LLOG_CHANGELOG_ORIG_CTXT,
279 obd, &changelog_orig_logops);
281 CERROR("%s: changelog llog setup failed: rc = %d\n",
286 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
289 rc = llog_open_create(env, ctxt, &ctxt->loc_handle, NULL,
292 GOTO(out_cleanup, rc);
294 rc = llog_cat_init_and_process(env, ctxt->loc_handle);
298 rc = llog_cat_reverse_process(env, ctxt->loc_handle,
299 changelog_init_cb, mdd);
302 CERROR("%s: changelog init failed: rc = %d\n", obd->obd_name,
307 CDEBUG(D_IOCTL, "changelog starting index="LPU64"\n",
308 mdd->mdd_cl.mc_index);
310 /* setup user changelog */
311 rc = llog_setup(env, obd, &obd->obd_olg, LLOG_CHANGELOG_USER_ORIG_CTXT,
312 obd, &changelog_orig_logops);
314 CERROR("%s: changelog users llog setup failed: rc = %d\n",
319 uctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT);
322 rc = llog_open_create(env, uctxt, &uctxt->loc_handle, NULL,
325 GOTO(out_ucleanup, rc);
327 uctxt->loc_handle->lgh_logops->lop_add = llog_cat_add_rec;
328 uctxt->loc_handle->lgh_logops->lop_declare_add = llog_cat_declare_add_rec;
330 rc = llog_cat_init_and_process(env, uctxt->loc_handle);
332 GOTO(out_uclose, rc);
334 rc = llog_cat_reverse_process(env, uctxt->loc_handle,
335 changelog_user_init_cb, mdd);
337 CERROR("%s: changelog user init failed: rc = %d\n",
339 GOTO(out_uclose, rc);
342 /* If we have registered users, assume we want changelogs on */
343 if (mdd->mdd_cl.mc_lastuser > 0) {
344 rc = mdd_changelog_on(env, mdd, 1);
346 GOTO(out_uclose, rc);
349 llog_ctxt_put(uctxt);
352 llog_cat_close(env, uctxt->loc_handle);
354 llog_cleanup(env, uctxt);
356 llog_cat_close(env, ctxt->loc_handle);
358 llog_cleanup(env, ctxt);
362 static int mdd_changelog_init(const struct lu_env *env, struct mdd_device *mdd)
364 struct obd_device *obd = mdd2obd_dev(mdd);
367 mdd->mdd_cl.mc_index = 0;
368 spin_lock_init(&mdd->mdd_cl.mc_lock);
369 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
370 mdd->mdd_cl.mc_flags = 0; /* off by default */
371 mdd->mdd_cl.mc_mask = CHANGELOG_DEFMASK;
372 spin_lock_init(&mdd->mdd_cl.mc_user_lock);
373 mdd->mdd_cl.mc_lastuser = 0;
375 rc = mdd_changelog_llog_init(env, mdd);
377 CERROR("%s: changelog setup during init failed: rc = %d\n",
379 mdd->mdd_cl.mc_flags |= CLM_ERR;
385 static void mdd_changelog_fini(const struct lu_env *env,
386 struct mdd_device *mdd)
388 struct obd_device *obd = mdd2obd_dev(mdd);
389 struct llog_ctxt *ctxt;
391 mdd->mdd_cl.mc_flags = 0;
393 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
395 llog_cat_close(env, ctxt->loc_handle);
396 llog_cleanup(env, ctxt);
398 ctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT);
400 llog_cat_close(env, ctxt->loc_handle);
401 llog_cleanup(env, ctxt);
405 int mdd_changelog_write_header(const struct lu_env *env,
406 struct mdd_device *mdd, int markerflags);
408 /* Start / stop recording */
409 int mdd_changelog_on(const struct lu_env *env, struct mdd_device *mdd, int on)
413 if ((on == 1) && ((mdd->mdd_cl.mc_flags & CLM_ON) == 0)) {
414 LCONSOLE_INFO("%s: changelog on\n", mdd2obd_dev(mdd)->obd_name);
415 if (mdd->mdd_cl.mc_flags & CLM_ERR) {
416 CERROR("Changelogs cannot be enabled due to error "
417 "condition (see %s log).\n",
418 mdd2obd_dev(mdd)->obd_name);
421 spin_lock(&mdd->mdd_cl.mc_lock);
422 mdd->mdd_cl.mc_flags |= CLM_ON;
423 spin_unlock(&mdd->mdd_cl.mc_lock);
424 rc = mdd_changelog_write_header(env, mdd, CLM_START);
426 } else if ((on == 0) && ((mdd->mdd_cl.mc_flags & CLM_ON) == CLM_ON)) {
427 LCONSOLE_INFO("%s: changelog off\n",mdd2obd_dev(mdd)->obd_name);
428 rc = mdd_changelog_write_header(env, mdd, CLM_FINI);
429 spin_lock(&mdd->mdd_cl.mc_lock);
430 mdd->mdd_cl.mc_flags &= ~CLM_ON;
431 spin_unlock(&mdd->mdd_cl.mc_lock);
436 /** Remove entries with indicies up to and including \a endrec from the
442 int mdd_changelog_llog_cancel(const struct lu_env *env,
443 struct mdd_device *mdd, long long endrec)
445 struct obd_device *obd = mdd2obd_dev(mdd);
446 struct llog_ctxt *ctxt;
447 long long unsigned cur;
450 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
454 spin_lock(&mdd->mdd_cl.mc_lock);
455 cur = (long long)mdd->mdd_cl.mc_index;
456 spin_unlock(&mdd->mdd_cl.mc_lock);
460 /* purge to "0" is shorthand for everything */
464 /* If purging all records, write a header entry so we don't have an
465 empty catalog and we're sure to have a valid starting index next
466 time. In case of crash, we just restart with old log so we're
469 /* XXX: transaction is started by llog itself */
470 rc = mdd_changelog_write_header(env, mdd, CLM_PURGE);
475 /* Some records were purged, so reset repeat-access time (so we
476 record new mtime update records, so users can see a file has been
477 changed since the last purge) */
478 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
480 rc = llog_cancel(env, ctxt, NULL, 1, (struct llog_cookie *)&endrec, 0);
486 /** Add a CL_MARK record to the changelog
488 * \param markerflags - CLM_*
491 int mdd_changelog_write_header(const struct lu_env *env,
492 struct mdd_device *mdd, int markerflags)
494 struct obd_device *obd = mdd2obd_dev(mdd);
495 struct llog_changelog_rec *rec;
497 struct llog_ctxt *ctxt;
499 int len = strlen(obd->obd_name);
504 if (mdd->mdd_cl.mc_mask & (1 << CL_MARK)) {
505 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
509 reclen = llog_data_len(sizeof(*rec) + len);
510 buf = lu_buf_check_and_alloc(&mdd_env_info(env)->mti_big_buf, reclen);
511 if (buf->lb_buf == NULL)
515 rec->cr.cr_flags = CLF_VERSION;
516 rec->cr.cr_type = CL_MARK;
517 rec->cr.cr_namelen = len;
518 memcpy(rec->cr.cr_name, obd->obd_name, rec->cr.cr_namelen);
519 /* Status and action flags */
520 rec->cr.cr_markerflags = mdd->mdd_cl.mc_flags | markerflags;
521 rec->cr_hdr.lrh_len = llog_data_len(sizeof(*rec) + rec->cr.cr_namelen);
522 rec->cr_hdr.lrh_type = CHANGELOG_REC;
523 rec->cr.cr_time = cl_time();
524 spin_lock(&mdd->mdd_cl.mc_lock);
525 rec->cr.cr_index = ++mdd->mdd_cl.mc_index;
526 spin_unlock(&mdd->mdd_cl.mc_lock);
528 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
531 rc = llog_cat_add(env, ctxt->loc_handle, &rec->cr_hdr, NULL, NULL);
536 /* assume on or off event; reset repeat-access time */
537 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
541 static int dot_lustre_mdd_permission(const struct lu_env *env,
542 struct md_object *pobj,
543 struct md_object *cobj,
544 struct md_attr *attr, int mask)
546 if (mask & ~(MAY_READ | MAY_EXEC))
552 static int dot_lustre_mdd_xattr_get(const struct lu_env *env,
553 struct md_object *obj, struct lu_buf *buf,
559 static int dot_lustre_mdd_xattr_list(const struct lu_env *env,
560 struct md_object *obj, struct lu_buf *buf)
565 static int dot_lustre_mdd_xattr_set(const struct lu_env *env,
566 struct md_object *obj,
567 const struct lu_buf *buf, const char *name,
573 static int dot_lustre_mdd_xattr_del(const struct lu_env *env,
574 struct md_object *obj,
580 static int dot_lustre_mdd_swap_layouts(const struct lu_env *env,
581 struct md_object *obj1,
582 struct md_object *obj2,
588 static int dot_lustre_mdd_readlink(const struct lu_env *env,
589 struct md_object *obj, struct lu_buf *buf)
594 static int dot_lustre_mdd_object_create(const struct lu_env *env,
595 struct md_object *obj,
596 const struct md_op_spec *spec,
602 static int dot_lustre_mdd_ref_add(const struct lu_env *env,
603 struct md_object *obj,
604 const struct md_attr *ma)
609 static int dot_lustre_mdd_ref_del(const struct lu_env *env,
610 struct md_object *obj,
616 static int dot_lustre_mdd_open(const struct lu_env *env, struct md_object *obj,
619 struct mdd_object *mdd_obj = md2mdd_obj(obj);
621 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
622 mdd_obj->mod_count++;
623 mdd_write_unlock(env, mdd_obj);
628 static int dot_lustre_mdd_close(const struct lu_env *env, struct md_object *obj,
629 struct md_attr *ma, int mode)
631 struct mdd_object *mdd_obj = md2mdd_obj(obj);
633 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
634 mdd_obj->mod_count--;
635 mdd_write_unlock(env, mdd_obj);
640 static int dot_lustre_mdd_object_sync(const struct lu_env *env,
641 struct md_object *obj)
646 static int dot_file_lock(const struct lu_env *env, struct md_object *obj,
647 struct lov_mds_md *lmm, struct ldlm_extent *extent,
648 struct lustre_handle *lockh)
653 static int dot_file_unlock(const struct lu_env *env, struct md_object *obj,
654 struct lov_mds_md *lmm, struct lustre_handle *lockh)
659 static struct md_object_operations mdd_dot_lustre_obj_ops = {
660 .moo_permission = dot_lustre_mdd_permission,
661 .moo_attr_get = mdd_attr_get,
662 .moo_attr_set = mdd_attr_set,
663 .moo_xattr_get = dot_lustre_mdd_xattr_get,
664 .moo_xattr_list = dot_lustre_mdd_xattr_list,
665 .moo_xattr_set = dot_lustre_mdd_xattr_set,
666 .moo_xattr_del = dot_lustre_mdd_xattr_del,
667 .moo_swap_layouts = dot_lustre_mdd_swap_layouts,
668 .moo_readpage = mdd_readpage,
669 .moo_readlink = dot_lustre_mdd_readlink,
670 .moo_object_create = dot_lustre_mdd_object_create,
671 .moo_ref_add = dot_lustre_mdd_ref_add,
672 .moo_ref_del = dot_lustre_mdd_ref_del,
673 .moo_open = dot_lustre_mdd_open,
674 .moo_close = dot_lustre_mdd_close,
675 .moo_capa_get = mdd_capa_get,
676 .moo_object_sync = dot_lustre_mdd_object_sync,
677 .moo_file_lock = dot_file_lock,
678 .moo_file_unlock = dot_file_unlock,
682 static int dot_lustre_mdd_lookup(const struct lu_env *env, struct md_object *p,
683 const struct lu_name *lname, struct lu_fid *f,
684 struct md_op_spec *spec)
686 if (strcmp(lname->ln_name, mdd_obf_dir_name) == 0) {
694 static mdl_mode_t dot_lustre_mdd_lock_mode(const struct lu_env *env,
695 struct md_object *obj,
701 static int dot_lustre_mdd_create(const struct lu_env *env,
702 struct md_object *pobj,
703 const struct lu_name *lname,
704 struct md_object *child,
705 struct md_op_spec *spec,
711 static int dot_lustre_mdd_create_data(const struct lu_env *env,
714 const struct md_op_spec *spec,
720 static int dot_lustre_mdd_rename(const struct lu_env *env,
721 struct md_object *src_pobj,
722 struct md_object *tgt_pobj,
723 const struct lu_fid *lf,
724 const struct lu_name *lsname,
725 struct md_object *tobj,
726 const struct lu_name *ltname,
732 static int dot_lustre_mdd_link(const struct lu_env *env,
733 struct md_object *tgt_obj,
734 struct md_object *src_obj,
735 const struct lu_name *lname,
741 static int dot_lustre_mdd_unlink(const struct lu_env *env,
742 struct md_object *pobj,
743 struct md_object *cobj,
744 const struct lu_name *lname,
745 struct md_attr *ma, int no_name)
750 static int dot_lustre_mdd_name_insert(const struct lu_env *env,
751 struct md_object *obj,
752 const struct lu_name *lname,
753 const struct lu_fid *fid,
754 const struct md_attr *ma)
759 static int dot_lustre_mdd_name_remove(const struct lu_env *env,
760 struct md_object *obj,
761 const struct lu_name *lname,
762 const struct md_attr *ma)
767 static int dot_lustre_mdd_rename_tgt(const struct lu_env *env,
768 struct md_object *pobj,
769 struct md_object *tobj,
770 const struct lu_fid *fid,
771 const struct lu_name *lname,
778 static struct md_dir_operations mdd_dot_lustre_dir_ops = {
779 .mdo_is_subdir = mdd_is_subdir,
780 .mdo_lookup = dot_lustre_mdd_lookup,
781 .mdo_lock_mode = dot_lustre_mdd_lock_mode,
782 .mdo_create = dot_lustre_mdd_create,
783 .mdo_create_data = dot_lustre_mdd_create_data,
784 .mdo_rename = dot_lustre_mdd_rename,
785 .mdo_link = dot_lustre_mdd_link,
786 .mdo_unlink = dot_lustre_mdd_unlink,
787 .mdo_name_insert = dot_lustre_mdd_name_insert,
788 .mdo_name_remove = dot_lustre_mdd_name_remove,
789 .mdo_rename_tgt = dot_lustre_mdd_rename_tgt,
792 static int obf_attr_get(const struct lu_env *env, struct md_object *obj,
795 struct mdd_device *mdd = mdo2mdd(obj);
797 /* "fid" is a virtual object and hence does not have any "real"
798 * attributes. So we reuse attributes of .lustre for "fid" dir */
799 return mdd_attr_get(env, &mdd->mdd_dot_lustre->mod_obj, ma);
802 static int obf_attr_set(const struct lu_env *env, struct md_object *obj,
803 const struct md_attr *ma)
808 static int obf_xattr_list(const struct lu_env *env,
809 struct md_object *obj, struct lu_buf *buf)
814 static int obf_xattr_get(const struct lu_env *env,
815 struct md_object *obj, struct lu_buf *buf,
818 struct mdd_device *mdd = mdo2mdd(obj);
819 struct mdd_object *root;
823 * .lustre returns default striping which is 'stored'
826 if (strcmp(name, XATTR_NAME_LOV) == 0) {
827 root = mdd_object_find(env, mdd, &mdd->mdd_local_root_fid);
829 return PTR_ERR(root);
830 rc = mdo_xattr_get(env, root, buf, name,
831 mdd_object_capa(env, md2mdd_obj(obj)));
832 mdd_object_put(env, root);
838 static int obf_xattr_set(const struct lu_env *env,
839 struct md_object *obj,
840 const struct lu_buf *buf, const char *name,
846 static int obf_xattr_del(const struct lu_env *env,
847 struct md_object *obj,
853 static int obf_mdd_open(const struct lu_env *env, struct md_object *obj,
856 struct mdd_object *mdd_obj = md2mdd_obj(obj);
858 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
859 mdd_obj->mod_count++;
860 mdd_write_unlock(env, mdd_obj);
865 static int obf_mdd_close(const struct lu_env *env, struct md_object *obj,
866 struct md_attr *ma, int mode)
868 struct mdd_object *mdd_obj = md2mdd_obj(obj);
870 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
871 mdd_obj->mod_count--;
872 mdd_write_unlock(env, mdd_obj);
877 /** Nothing to list in "fid" directory */
878 static int obf_mdd_readpage(const struct lu_env *env, struct md_object *obj,
879 const struct lu_rdpg *rdpg)
884 static struct md_object_operations mdd_obf_obj_ops = {
885 .moo_attr_get = obf_attr_get,
886 .moo_attr_set = obf_attr_set,
887 .moo_xattr_list = obf_xattr_list,
888 .moo_xattr_get = obf_xattr_get,
889 .moo_xattr_set = obf_xattr_set,
890 .moo_xattr_del = obf_xattr_del,
891 .moo_open = obf_mdd_open,
892 .moo_close = obf_mdd_close,
893 .moo_readpage = obf_mdd_readpage,
897 * Lookup method for "fid" object. Only filenames with correct SEQ:OID format
898 * are valid. We also check if object with passed fid exists or not.
900 static int obf_lookup(const struct lu_env *env, struct md_object *p,
901 const struct lu_name *lname, struct lu_fid *f,
902 struct md_op_spec *spec)
904 char *name = (char *)lname->ln_name;
905 struct mdd_device *mdd = mdo2mdd(p);
906 struct mdd_object *child;
912 sscanf(name, SFID, RFID(f));
913 if (!fid_is_sane(f)) {
914 CWARN("%s: bad FID format [%s], should be "DFID"\n",
915 mdd2obd_dev(mdd)->obd_name, lname->ln_name,
916 (__u64)FID_SEQ_NORMAL, 1, 0);
917 GOTO(out, rc = -EINVAL);
920 if (!fid_is_norm(f)) {
921 CWARN("%s: "DFID" is invalid, sequence should be "
922 ">= "LPX64"\n", mdd2obd_dev(mdd)->obd_name, PFID(f),
923 (__u64)FID_SEQ_NORMAL);
924 GOTO(out, rc = -EINVAL);
927 /* Check if object with this fid exists */
928 child = mdd_object_find(env, mdd, f);
932 GOTO(out, rc = PTR_ERR(child));
934 if (mdd_object_exists(child) == 0)
937 mdd_object_put(env, child);
943 static int obf_create(const struct lu_env *env, struct md_object *pobj,
944 const struct lu_name *lname, struct md_object *child,
945 struct md_op_spec *spec, struct md_attr* ma)
950 static int obf_rename(const struct lu_env *env,
951 struct md_object *src_pobj, struct md_object *tgt_pobj,
952 const struct lu_fid *lf, const struct lu_name *lsname,
953 struct md_object *tobj, const struct lu_name *ltname,
959 static int obf_link(const struct lu_env *env, struct md_object *tgt_obj,
960 struct md_object *src_obj, const struct lu_name *lname,
966 static int obf_unlink(const struct lu_env *env, struct md_object *pobj,
967 struct md_object *cobj, const struct lu_name *lname,
968 struct md_attr *ma, int no_name)
973 static struct md_dir_operations mdd_obf_dir_ops = {
974 .mdo_lookup = obf_lookup,
975 .mdo_create = obf_create,
976 .mdo_rename = obf_rename,
977 .mdo_link = obf_link,
978 .mdo_unlink = obf_unlink
982 * Create special in-memory "fid" object for open-by-fid.
984 static int mdd_obf_setup(const struct lu_env *env, struct mdd_device *m)
986 struct mdd_object *mdd_obf;
988 mdd_obf = mdd_object_find(env, m, &LU_OBF_FID);
989 if (mdd_obf == NULL || IS_ERR(mdd_obf))
992 m->mdd_dot_lustre_objs.mdd_obf = mdd_obf;
993 mdd_obf->mod_obj.mo_dir_ops = &mdd_obf_dir_ops;
994 mdd_obf->mod_obj.mo_ops = &mdd_obf_obj_ops;
995 /* Don't allow objects to be created in "fid" dir */
996 mdd_obf->mod_flags |= IMMUTE_OBJ;
998 mdd2lu_obj(mdd_obf)->lo_header->loh_attr |= LOHA_EXISTS | S_IFDIR;
1002 static struct md_object *mdo_locate(const struct lu_env *env,
1003 struct md_device *md,
1004 const struct lu_fid *fid)
1006 struct lu_object *obj;
1007 struct md_object *mdo;
1009 obj = lu_object_find(env, &md->md_lu_dev, fid, NULL);
1011 obj = lu_object_locate(obj->lo_header, md->md_lu_dev.ld_type);
1012 LASSERT(obj != NULL);
1015 mdo = ERR_PTR(PTR_ERR(obj));
1020 /** Setup ".lustre" directory object */
1021 static int mdd_dot_lustre_setup(const struct lu_env *env, struct mdd_device *m)
1023 struct md_object *mdo;
1028 /* Create ".lustre" directory in ROOT. */
1029 fid = LU_DOT_LUSTRE_FID;
1030 rc = mdd_local_file_create(env, m, &m->mdd_root_fid,
1032 S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO,
1036 mdo = mdo_locate(env, &m->mdd_md_dev, &fid);
1038 RETURN(PTR_ERR(mdo));
1039 LASSERT(lu_object_exists(&mdo->mo_lu));
1041 m->mdd_dot_lustre = md2mdd_obj(mdo);
1042 m->mdd_dot_lustre->mod_obj.mo_dir_ops = &mdd_dot_lustre_dir_ops;
1043 m->mdd_dot_lustre->mod_obj.mo_ops = &mdd_dot_lustre_obj_ops;
1045 rc = mdd_obf_setup(env, m);
1047 CERROR("%s: error initializing \"fid\" object: rc = %d.\n",
1048 mdd2obd_dev(m)->obd_name, rc);
1053 mdd_object_put(env, m->mdd_dot_lustre);
1054 m->mdd_dot_lustre = NULL;
1058 static void mdd_device_shutdown(const struct lu_env *env, struct mdd_device *m,
1059 struct lustre_cfg *cfg)
1061 mdd_lfsck_cleanup(env, m);
1062 mdd_changelog_fini(env, m);
1063 orph_index_fini(env, m);
1064 if (m->mdd_dot_lustre_objs.mdd_obf)
1065 mdd_object_put(env, m->mdd_dot_lustre_objs.mdd_obf);
1066 if (m->mdd_dot_lustre)
1067 mdd_object_put(env, m->mdd_dot_lustre);
1068 if (m->mdd_los != NULL)
1069 local_oid_storage_fini(env, m->mdd_los);
1070 lu_site_purge(env, mdd2lu_dev(m)->ld_site, ~0);
1072 if (m->mdd_child_exp)
1073 obd_disconnect(m->mdd_child_exp);
1076 static int mdd_process_config(const struct lu_env *env,
1077 struct lu_device *d, struct lustre_cfg *cfg)
1079 struct mdd_device *m = lu2mdd_dev(d);
1080 struct dt_device *dt = m->mdd_child;
1081 struct lu_device *next = &dt->dd_lu_dev;
1085 switch (cfg->lcfg_command) {
1087 struct lprocfs_static_vars lvars;
1089 lprocfs_mdd_init_vars(&lvars);
1090 rc = class_process_proc_param(PARAM_MDD, lvars.obd_vars, cfg,m);
1091 if (rc > 0 || rc == -ENOSYS)
1092 /* we don't understand; pass it on */
1093 rc = next->ld_ops->ldo_process_config(env, next, cfg);
1097 rc = next->ld_ops->ldo_process_config(env, next, cfg);
1100 dt_conf_get(env, dt, &m->mdd_dt_conf);
1103 rc = next->ld_ops->ldo_process_config(env, next, cfg);
1104 lu_dev_del_linkage(d->ld_site, d);
1105 mdd_device_shutdown(env, m, cfg);
1108 rc = next->ld_ops->ldo_process_config(env, next, cfg);
1115 static int mdd_recovery_complete(const struct lu_env *env,
1116 struct lu_device *d)
1118 struct mdd_device *mdd = lu2mdd_dev(d);
1119 struct lu_device *next;
1123 LASSERT(mdd != NULL);
1124 next = &mdd->mdd_child->dd_lu_dev;
1126 /* XXX: orphans handling. */
1127 __mdd_orphan_cleanup(env, mdd);
1128 rc = next->ld_ops->ldo_recovery_complete(env, next);
1133 int mdd_local_file_create(const struct lu_env *env, struct mdd_device *mdd,
1134 const struct lu_fid *pfid, const char *name, __u32 mode,
1137 struct dt_object *parent, *dto;
1142 LASSERT(!fid_is_zero(pfid));
1143 parent = dt_locate(env, mdd->mdd_bottom, pfid);
1144 if (unlikely(IS_ERR(parent)))
1145 RETURN(PTR_ERR(parent));
1147 /* create local file/dir, if @fid is passed then try to use it */
1148 if (fid_is_zero(fid))
1149 dto = local_file_find_or_create(env, mdd->mdd_los, parent,
1152 dto = local_file_find_or_create_with_fid(env, mdd->mdd_bottom,
1156 GOTO(out_put, rc = PTR_ERR(dto));
1157 *fid = *lu_object_fid(&dto->do_lu);
1158 /* since stack is not fully set up the local_storage uses own stack
1159 * and we should drop its object from cache */
1160 lu_object_put_nocache(env, &dto->do_lu);
1163 lu_object_put(env, &parent->do_lu);
1167 static int mdd_prepare(const struct lu_env *env,
1168 struct lu_device *pdev,
1169 struct lu_device *cdev)
1171 struct mdd_device *mdd = lu2mdd_dev(cdev);
1172 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
1178 rc = next->ld_ops->ldo_prepare(env, cdev, next);
1182 /* Setup local dirs */
1183 fid.f_seq = FID_SEQ_LOCAL_NAME;
1186 rc = local_oid_storage_init(env, mdd->mdd_bottom, &fid,
1191 rc = dt_root_get(env, mdd->mdd_child, &mdd->mdd_local_root_fid);
1195 if (mdd_seq_site(mdd)->ss_node_id == 0) {
1197 rc = mdd_local_file_create(env, mdd, &mdd->mdd_local_root_fid,
1198 mdd_root_dir_name, S_IFDIR |
1199 S_IRUGO | S_IWUSR | S_IXUGO, &fid);
1201 CERROR("%s: create root fid failed: rc = %d\n",
1202 mdd2obd_dev(mdd)->obd_name, rc);
1205 mdd->mdd_root_fid = fid;
1207 rc = mdd_dot_lustre_setup(env, mdd);
1209 CERROR("%s: initializing .lustre failed: rc = %d\n",
1210 mdd2obd_dev(mdd)->obd_name, rc);
1214 rc = mdd_compat_fixes(env, mdd);
1220 rc = orph_index_init(env, mdd);
1224 rc = mdd_changelog_init(env, mdd);
1226 CERROR("%s: failed to initialize changelog: rc = %d\n",
1227 mdd2obd_dev(mdd)->obd_name, rc);
1231 rc = mdd_lfsck_setup(env, mdd);
1233 CERROR("%s: failed to initialize lfsck: rc = %d\n",
1234 mdd2obd_dev(mdd)->obd_name, rc);
1235 GOTO(out_changelog, rc);
1239 mdd_changelog_fini(env, mdd);
1241 orph_index_fini(env, mdd);
1243 if (mdd_seq_site(mdd)->ss_node_id == 0) {
1244 mdd_object_put(env, mdd->mdd_dot_lustre);
1245 mdd->mdd_dot_lustre = NULL;
1246 mdd_object_put(env, mdd->mdd_dot_lustre_objs.mdd_obf);
1247 mdd->mdd_dot_lustre_objs.mdd_obf = NULL;
1250 local_oid_storage_fini(env, mdd->mdd_los);
1251 mdd->mdd_los = NULL;
1255 const struct lu_device_operations mdd_lu_ops = {
1256 .ldo_object_alloc = mdd_object_alloc,
1257 .ldo_process_config = mdd_process_config,
1258 .ldo_recovery_complete = mdd_recovery_complete,
1259 .ldo_prepare = mdd_prepare,
1262 static int mdd_root_get(const struct lu_env *env,
1263 struct md_device *m, struct lu_fid *f)
1265 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1268 *f = mdd->mdd_root_fid;
1273 * No permission check is needed.
1275 static int mdd_statfs(const struct lu_env *env, struct md_device *m,
1276 struct obd_statfs *sfs)
1278 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1283 rc = mdd_child_ops(mdd)->dt_statfs(env, mdd->mdd_child, sfs);
1289 * No permission check is needed.
1291 static int mdd_init_capa_ctxt(const struct lu_env *env, struct md_device *m,
1292 int mode, unsigned long timeout, __u32 alg,
1293 struct lustre_capa_key *keys)
1295 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1299 /* need barrier for mds_capa_keys access. */
1301 rc = mdd_child_ops(mdd)->dt_init_capa_ctxt(env, mdd->mdd_child, mode,
1302 timeout, alg, keys);
1306 static int mdd_update_capa_key(const struct lu_env *env,
1307 struct md_device *m,
1308 struct lustre_capa_key *key)
1310 /* we do not support capabilities ... */
1314 static int mdd_llog_ctxt_get(const struct lu_env *env, struct md_device *m,
1317 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1319 *h = llog_group_get_ctxt(&mdd2obd_dev(mdd)->obd_olg, idx);
1320 return (*h == NULL ? -ENOENT : 0);
1323 static struct lu_device *mdd_device_free(const struct lu_env *env,
1324 struct lu_device *lu)
1326 struct mdd_device *m = lu2mdd_dev(lu);
1329 LASSERT(cfs_atomic_read(&lu->ld_ref) == 0);
1330 md_device_fini(&m->mdd_md_dev);
1335 static struct lu_device *mdd_device_alloc(const struct lu_env *env,
1336 struct lu_device_type *t,
1337 struct lustre_cfg *lcfg)
1339 struct lu_device *l;
1340 struct mdd_device *m;
1344 l = ERR_PTR(-ENOMEM);
1349 md_device_init(&m->mdd_md_dev, t);
1350 rc = mdd_init0(env, m, t, lcfg);
1352 mdd_device_free(env, l);
1361 * we use exports to track all mdd users
1363 static int mdd_obd_connect(const struct lu_env *env, struct obd_export **exp,
1364 struct obd_device *obd, struct obd_uuid *cluuid,
1365 struct obd_connect_data *data, void *localdata)
1367 struct mdd_device *mdd = lu2mdd_dev(obd->obd_lu_dev);
1368 struct lustre_handle conn;
1372 CDEBUG(D_CONFIG, "connect #%d\n", mdd->mdd_connects);
1374 rc = class_connect(&conn, obd, cluuid);
1378 *exp = class_conn2export(&conn);
1380 /* Why should there ever be more than 1 connect? */
1381 LASSERT(mdd->mdd_connects == 0);
1382 mdd->mdd_connects++;
1388 * once last export (we don't count self-export) disappeared
1389 * mdd can be released
1391 static int mdd_obd_disconnect(struct obd_export *exp)
1393 struct obd_device *obd = exp->exp_obd;
1394 struct mdd_device *mdd = lu2mdd_dev(obd->obd_lu_dev);
1395 int rc, release = 0;
1398 mdd->mdd_connects--;
1399 if (mdd->mdd_connects == 0)
1402 rc = class_disconnect(exp);
1404 if (rc == 0 && release)
1405 class_manual_cleanup(obd);
1409 static int mdd_obd_health_check(const struct lu_env *env,
1410 struct obd_device *obd)
1412 struct mdd_device *mdd = lu2mdd_dev(obd->obd_lu_dev);
1417 rc = obd_health_check(env, mdd->mdd_child_exp->exp_obd);
1421 static struct obd_ops mdd_obd_device_ops = {
1422 .o_owner = THIS_MODULE,
1423 .o_connect = mdd_obd_connect,
1424 .o_disconnect = mdd_obd_disconnect,
1425 .o_health_check = mdd_obd_health_check
1429 * context key constructor/destructor:
1430 * mdd_capainfo_key_init, mdd_capainfo_key_fini
1432 LU_KEY_INIT_FINI(mdd_capainfo, struct md_capainfo);
1434 struct lu_context_key mdd_capainfo_key = {
1435 .lct_tags = LCT_SESSION,
1436 .lct_init = mdd_capainfo_key_init,
1437 .lct_fini = mdd_capainfo_key_fini
1440 struct md_capainfo *md_capainfo(const struct lu_env *env)
1442 /* NB, in mdt_init0 */
1443 if (env->le_ses == NULL)
1445 return lu_context_key_get(env->le_ses, &mdd_capainfo_key);
1447 EXPORT_SYMBOL(md_capainfo);
1449 static int mdd_changelog_user_register(const struct lu_env *env,
1450 struct mdd_device *mdd, int *id)
1452 struct llog_ctxt *ctxt;
1453 struct llog_changelog_user_rec *rec;
1457 ctxt = llog_get_context(mdd2obd_dev(mdd),
1458 LLOG_CHANGELOG_USER_ORIG_CTXT);
1464 llog_ctxt_put(ctxt);
1468 /* Assume we want it on since somebody registered */
1469 rc = mdd_changelog_on(env, mdd, 1);
1473 rec->cur_hdr.lrh_len = sizeof(*rec);
1474 rec->cur_hdr.lrh_type = CHANGELOG_USER_REC;
1475 spin_lock(&mdd->mdd_cl.mc_user_lock);
1476 if (mdd->mdd_cl.mc_lastuser == (unsigned int)(-1)) {
1477 spin_unlock(&mdd->mdd_cl.mc_user_lock);
1478 CERROR("Maximum number of changelog users exceeded!\n");
1479 GOTO(out, rc = -EOVERFLOW);
1481 *id = rec->cur_id = ++mdd->mdd_cl.mc_lastuser;
1482 rec->cur_endrec = mdd->mdd_cl.mc_index;
1483 spin_unlock(&mdd->mdd_cl.mc_user_lock);
1485 rc = llog_cat_add(env, ctxt->loc_handle, &rec->cur_hdr, NULL, NULL);
1487 CDEBUG(D_IOCTL, "Registered changelog user %d\n", *id);
1490 llog_ctxt_put(ctxt);
1494 struct mdd_changelog_user_data {
1495 __u64 mcud_endrec; /**< purge record for this user */
1496 __u64 mcud_minrec; /**< lowest changelog recno still referenced */
1498 __u32 mcud_minid; /**< user id with lowest rec reference */
1499 __u32 mcud_usercount;
1500 unsigned int mcud_found:1;
1502 #define MCUD_UNREGISTER -1LL
1505 * 1. Find the smallest record everyone is willing to purge
1506 * 2. Update the last purgeable record for this user
1508 static int mdd_changelog_user_purge_cb(const struct lu_env *env,
1509 struct llog_handle *llh,
1510 struct llog_rec_hdr *hdr, void *data)
1512 struct llog_changelog_user_rec *rec;
1513 struct mdd_changelog_user_data *mcud = data;
1518 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
1520 rec = (struct llog_changelog_user_rec *)hdr;
1522 mcud->mcud_usercount++;
1524 /* If we have a new endrec for this id, use it for the following
1525 min check instead of its old value */
1526 if (rec->cur_id == mcud->mcud_id)
1527 rec->cur_endrec = max(rec->cur_endrec, mcud->mcud_endrec);
1529 /* Track the minimum referenced record */
1530 if (mcud->mcud_minid == 0 || mcud->mcud_minrec > rec->cur_endrec) {
1531 mcud->mcud_minid = rec->cur_id;
1532 mcud->mcud_minrec = rec->cur_endrec;
1535 if (rec->cur_id != mcud->mcud_id)
1538 /* Update this user's record */
1539 mcud->mcud_found = 1;
1541 /* Special case: unregister this user */
1542 if (mcud->mcud_endrec == MCUD_UNREGISTER) {
1543 struct llog_cookie cookie;
1545 cookie.lgc_lgl = llh->lgh_id;
1546 cookie.lgc_index = hdr->lrh_index;
1548 rc = llog_cat_cancel_records(env, llh->u.phd.phd_cat_handle,
1551 mcud->mcud_usercount--;
1556 /* Update the endrec */
1557 CDEBUG(D_IOCTL, "Rewriting changelog user %d endrec to "LPU64"\n",
1558 mcud->mcud_id, rec->cur_endrec);
1560 /* hdr+1 is loc of data */
1561 hdr->lrh_len -= sizeof(*hdr) + sizeof(struct llog_rec_tail);
1562 rc = llog_write(env, llh, hdr, NULL, 0, (void *)(hdr + 1),
1568 static int mdd_changelog_user_purge(const struct lu_env *env,
1569 struct mdd_device *mdd, int id,
1572 struct mdd_changelog_user_data data;
1573 struct llog_ctxt *ctxt;
1577 CDEBUG(D_IOCTL, "Purge request: id=%d, endrec=%lld\n", id, endrec);
1580 data.mcud_minid = 0;
1581 data.mcud_minrec = 0;
1582 data.mcud_usercount = 0;
1583 data.mcud_endrec = endrec;
1584 spin_lock(&mdd->mdd_cl.mc_lock);
1585 endrec = mdd->mdd_cl.mc_index;
1586 spin_unlock(&mdd->mdd_cl.mc_lock);
1587 if ((data.mcud_endrec == 0) ||
1588 ((data.mcud_endrec > endrec) &&
1589 (data.mcud_endrec != MCUD_UNREGISTER)))
1590 data.mcud_endrec = endrec;
1592 ctxt = llog_get_context(mdd2obd_dev(mdd),
1593 LLOG_CHANGELOG_USER_ORIG_CTXT);
1597 LASSERT(ctxt->loc_handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
1599 rc = llog_cat_process(env, ctxt->loc_handle,
1600 mdd_changelog_user_purge_cb, (void *)&data,
1602 if ((rc >= 0) && (data.mcud_minrec > 0)) {
1603 CDEBUG(D_IOCTL, "Purging changelog entries up to "LPD64
1604 ", referenced by "CHANGELOG_USER_PREFIX"%d\n",
1605 data.mcud_minrec, data.mcud_minid);
1606 rc = mdd_changelog_llog_cancel(env, mdd, data.mcud_minrec);
1608 CWARN("Could not determine changelog records to purge; rc=%d\n",
1612 llog_ctxt_put(ctxt);
1614 if (!data.mcud_found) {
1615 CWARN("No entry for user %d. Last changelog reference is "
1616 LPD64" by changelog user %d\n", data.mcud_id,
1617 data.mcud_minrec, data.mcud_minid);
1621 if (!rc && data.mcud_usercount == 0)
1622 /* No more users; turn changelogs off */
1623 rc = mdd_changelog_on(env, mdd, 0);
1629 * May be called remotely from mdt_iocontrol_handle or locally from
1630 * mdt_iocontrol. Data may be freeform - remote handling doesn't enforce
1631 * an obd_ioctl_data format (but local ioctl handler does).
1633 * \param len - data len
1634 * \param karg - ioctl data, in kernel space
1636 static int mdd_iocontrol(const struct lu_env *env, struct md_device *m,
1637 unsigned int cmd, int len, void *karg)
1639 struct mdd_device *mdd;
1640 struct obd_ioctl_data *data = karg;
1644 mdd = lu2mdd_dev(&m->md_lu_dev);
1646 /* Doesn't use obd_ioctl_data */
1648 case OBD_IOC_CHANGELOG_CLEAR: {
1649 struct changelog_setinfo *cs = karg;
1650 rc = mdd_changelog_user_purge(env, mdd, cs->cs_id,
1654 case OBD_IOC_GET_MNTOPT: {
1655 mntopt_t *mntopts = (mntopt_t *)karg;
1656 *mntopts = mdd->mdd_dt_conf.ddp_mntopts;
1659 case OBD_IOC_START_LFSCK: {
1660 rc = mdd_lfsck_start(env, &mdd->mdd_lfsck,
1661 (struct lfsck_start *)karg);
1664 case OBD_IOC_STOP_LFSCK: {
1665 rc = mdd_lfsck_stop(env, &mdd->mdd_lfsck, false);
1668 case OBD_IOC_PAUSE_LFSCK: {
1669 rc = mdd_lfsck_stop(env, &mdd->mdd_lfsck, true);
1674 /* Below ioctls use obd_ioctl_data */
1675 if (len != sizeof(*data)) {
1676 CERROR("Bad ioctl size %d\n", len);
1679 if (data->ioc_version != OBD_IOCTL_VERSION) {
1680 CERROR("Bad magic %x != %x\n", data->ioc_version,
1686 case OBD_IOC_CHANGELOG_REG:
1687 rc = mdd_changelog_user_register(env, mdd, &data->ioc_u32_1);
1689 case OBD_IOC_CHANGELOG_DEREG:
1690 rc = mdd_changelog_user_purge(env, mdd, data->ioc_u32_1,
1700 /* type constructor/destructor: mdd_type_init, mdd_type_fini */
1701 LU_TYPE_INIT_FINI(mdd, &mdd_thread_key, &mdd_capainfo_key);
1703 const struct md_device_operations mdd_ops = {
1704 .mdo_statfs = mdd_statfs,
1705 .mdo_root_get = mdd_root_get,
1706 .mdo_init_capa_ctxt = mdd_init_capa_ctxt,
1707 .mdo_update_capa_key= mdd_update_capa_key,
1708 .mdo_llog_ctxt_get = mdd_llog_ctxt_get,
1709 .mdo_iocontrol = mdd_iocontrol,
1712 static struct lu_device_type_operations mdd_device_type_ops = {
1713 .ldto_init = mdd_type_init,
1714 .ldto_fini = mdd_type_fini,
1716 .ldto_start = mdd_type_start,
1717 .ldto_stop = mdd_type_stop,
1719 .ldto_device_alloc = mdd_device_alloc,
1720 .ldto_device_free = mdd_device_free,
1722 .ldto_device_fini = mdd_device_fini
1725 static struct lu_device_type mdd_device_type = {
1726 .ldt_tags = LU_DEVICE_MD,
1727 .ldt_name = LUSTRE_MDD_NAME,
1728 .ldt_ops = &mdd_device_type_ops,
1729 .ldt_ctx_tags = LCT_MD_THREAD
1732 /* context key constructor: mdd_key_init */
1733 LU_KEY_INIT(mdd, struct mdd_thread_info);
1735 static void mdd_key_fini(const struct lu_context *ctx,
1736 struct lu_context_key *key, void *data)
1738 struct mdd_thread_info *info = data;
1740 lu_buf_free(&info->mti_big_buf);
1741 lu_buf_free(&info->mti_link_buf);
1746 /* context key: mdd_thread_key */
1747 LU_CONTEXT_KEY_DEFINE(mdd, LCT_MD_THREAD);
1749 static int __init mdd_mod_init(void)
1751 struct lprocfs_static_vars lvars;
1754 lprocfs_mdd_init_vars(&lvars);
1756 rc = lu_kmem_init(mdd_caches);
1760 changelog_orig_logops = llog_osd_ops;
1761 changelog_orig_logops.lop_cancel = llog_changelog_cancel;
1762 changelog_orig_logops.lop_add = llog_cat_add_rec;
1763 changelog_orig_logops.lop_declare_add = llog_cat_declare_add_rec;
1765 rc = class_register_type(&mdd_obd_device_ops, NULL, lvars.module_vars,
1766 LUSTRE_MDD_NAME, &mdd_device_type);
1768 lu_kmem_fini(mdd_caches);
1772 static void __exit mdd_mod_exit(void)
1774 class_unregister_type(LUSTRE_MDD_NAME);
1775 lu_kmem_fini(mdd_caches);
1778 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
1779 MODULE_DESCRIPTION("Lustre Meta-data Device Prototype ("LUSTRE_MDD_NAME")");
1780 MODULE_LICENSE("GPL");
1782 cfs_module(mdd, "0.1.0", mdd_mod_init, mdd_mod_exit);