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 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
245 mdd->mdd_cl.mc_flags = 0; /* off by default */
246 mdd->mdd_cl.mc_mask = CHANGELOG_DEFMASK;
247 cfs_spin_lock_init(&mdd->mdd_cl.mc_user_lock);
248 mdd->mdd_cl.mc_lastuser = 0;
250 rc = mdd_changelog_llog_init(mdd);
252 CERROR("Changelog setup during init failed %d\n", rc);
253 mdd->mdd_cl.mc_flags |= CLM_ERR;
259 static void mdd_changelog_fini(const struct lu_env *env, struct mdd_device *mdd)
261 mdd->mdd_cl.mc_flags = 0;
264 /* Start / stop recording */
265 int mdd_changelog_on(struct mdd_device *mdd, int on)
269 if ((on == 1) && ((mdd->mdd_cl.mc_flags & CLM_ON) == 0)) {
270 LCONSOLE_INFO("%s: changelog on\n", mdd2obd_dev(mdd)->obd_name);
271 if (mdd->mdd_cl.mc_flags & CLM_ERR) {
272 CERROR("Changelogs cannot be enabled due to error "
273 "condition (see %s log).\n",
274 mdd2obd_dev(mdd)->obd_name);
277 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
278 mdd->mdd_cl.mc_flags |= CLM_ON;
279 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
280 rc = mdd_changelog_write_header(mdd, CLM_START);
282 } else if ((on == 0) && ((mdd->mdd_cl.mc_flags & CLM_ON) == CLM_ON)) {
283 LCONSOLE_INFO("%s: changelog off\n",mdd2obd_dev(mdd)->obd_name);
284 rc = mdd_changelog_write_header(mdd, CLM_FINI);
285 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
286 mdd->mdd_cl.mc_flags &= ~CLM_ON;
287 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
292 static __u64 cl_time(void) {
295 cfs_fs_time_current(&time);
296 return (((__u64)time.tv_sec) << 30) + time.tv_nsec;
299 /** Add a changelog entry \a rec to the changelog llog
302 * \param handle - currently ignored since llogs start their own transaction;
303 * this will hopefully be fixed in llog rewrite
306 int mdd_changelog_llog_write(struct mdd_device *mdd,
307 struct llog_changelog_rec *rec,
308 struct thandle *handle)
310 struct obd_device *obd = mdd2obd_dev(mdd);
311 struct llog_ctxt *ctxt;
314 rec->cr_hdr.lrh_len = llog_data_len(sizeof(*rec) + rec->cr.cr_namelen);
315 /* llog_lvfs_write_rec sets the llog tail len */
316 rec->cr_hdr.lrh_type = CHANGELOG_REC;
317 rec->cr.cr_time = cl_time();
318 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
319 /* NB: I suppose it's possible llog_add adds out of order wrt cr_index,
320 but as long as the MDD transactions are ordered correctly for e.g.
321 rename conflicts, I don't think this should matter. */
322 rec->cr.cr_index = ++mdd->mdd_cl.mc_index;
323 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
324 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
328 /* nested journal transaction */
329 rc = llog_add(ctxt, &rec->cr_hdr, NULL, NULL, 0);
335 /** Remove entries with indicies up to and including \a endrec from the
341 int mdd_changelog_llog_cancel(struct mdd_device *mdd, long long endrec)
343 struct obd_device *obd = mdd2obd_dev(mdd);
344 struct llog_ctxt *ctxt;
345 long long unsigned cur;
348 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
352 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
353 cur = (long long)mdd->mdd_cl.mc_index;
354 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
358 /* purge to "0" is shorthand for everything */
362 /* If purging all records, write a header entry so we don't have an
363 empty catalog and we're sure to have a valid starting index next
364 time. In case of crash, we just restart with old log so we're
367 rc = mdd_changelog_write_header(mdd, CLM_PURGE);
372 /* Some records were purged, so reset repeat-access time (so we
373 record new mtime update records, so users can see a file has been
374 changed since the last purge) */
375 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
377 rc = llog_cancel(ctxt, NULL, 1, (struct llog_cookie *)&endrec, 0);
383 /** Add a CL_MARK record to the changelog
385 * \param markerflags - CLM_*
388 int mdd_changelog_write_header(struct mdd_device *mdd, int markerflags)
390 struct obd_device *obd = mdd2obd_dev(mdd);
391 struct llog_changelog_rec *rec;
393 int len = strlen(obd->obd_name);
397 reclen = llog_data_len(sizeof(*rec) + len);
398 OBD_ALLOC(rec, reclen);
402 rec->cr.cr_flags = CLF_VERSION;
403 rec->cr.cr_type = CL_MARK;
404 rec->cr.cr_namelen = len;
405 memcpy(rec->cr.cr_name, obd->obd_name, rec->cr.cr_namelen);
406 /* Status and action flags */
407 rec->cr.cr_markerflags = mdd->mdd_cl.mc_flags | markerflags;
409 rc = (mdd->mdd_cl.mc_mask & (1 << CL_MARK)) ?
410 mdd_changelog_llog_write(mdd, rec, NULL) : 0;
412 /* assume on or off event; reset repeat-access time */
413 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
415 OBD_FREE(rec, reclen);
420 * Create ".lustre" directory.
422 static int create_dot_lustre_dir(const struct lu_env *env, struct mdd_device *m)
424 struct lu_fid *fid = &mdd_env_info(env)->mti_fid;
425 struct md_object *mdo;
428 memcpy(fid, &LU_DOT_LUSTRE_FID, sizeof(struct lu_fid));
429 mdo = llo_store_create_index(env, &m->mdd_md_dev, m->mdd_child,
430 mdd_root_dir_name, dot_lustre_name,
431 fid, &dt_directory_features);
432 /* .lustre dir may be already present */
433 if (IS_ERR(mdo) && PTR_ERR(mdo) != -EEXIST) {
435 CERROR("creating obj [%s] fid = "DFID" rc = %d\n",
436 dot_lustre_name, PFID(fid), rc);
441 lu_object_put(env, &mdo->mo_lu);
447 static int dot_lustre_mdd_permission(const struct lu_env *env,
448 struct md_object *pobj,
449 struct md_object *cobj,
450 struct md_attr *attr, int mask)
452 if (mask & ~(MAY_READ | MAY_EXEC))
458 static int dot_lustre_mdd_attr_get(const struct lu_env *env,
459 struct md_object *obj, struct md_attr *ma)
461 struct mdd_object *mdd_obj = md2mdd_obj(obj);
463 return mdd_attr_get_internal_locked(env, mdd_obj, ma);
466 static int dot_lustre_mdd_attr_set(const struct lu_env *env,
467 struct md_object *obj,
468 const struct md_attr *ma)
473 static int dot_lustre_mdd_xattr_get(const struct lu_env *env,
474 struct md_object *obj, struct lu_buf *buf,
480 static int dot_lustre_mdd_xattr_list(const struct lu_env *env,
481 struct md_object *obj, struct lu_buf *buf)
486 static int dot_lustre_mdd_xattr_set(const struct lu_env *env,
487 struct md_object *obj,
488 const struct lu_buf *buf, const char *name,
494 static int dot_lustre_mdd_xattr_del(const struct lu_env *env,
495 struct md_object *obj,
501 static int dot_lustre_mdd_readlink(const struct lu_env *env,
502 struct md_object *obj, struct lu_buf *buf)
507 static int dot_lustre_mdd_object_create(const struct lu_env *env,
508 struct md_object *obj,
509 const struct md_op_spec *spec,
515 static int dot_lustre_mdd_ref_add(const struct lu_env *env,
516 struct md_object *obj,
517 const struct md_attr *ma)
522 static int dot_lustre_mdd_ref_del(const struct lu_env *env,
523 struct md_object *obj,
529 static int dot_lustre_mdd_open(const struct lu_env *env, struct md_object *obj,
532 struct mdd_object *mdd_obj = md2mdd_obj(obj);
534 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
535 mdd_obj->mod_count++;
536 mdd_write_unlock(env, mdd_obj);
541 static int dot_lustre_mdd_close(const struct lu_env *env, struct md_object *obj,
544 struct mdd_object *mdd_obj = md2mdd_obj(obj);
546 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
547 mdd_obj->mod_count--;
548 mdd_write_unlock(env, mdd_obj);
553 static int dot_lustre_mdd_object_sync(const struct lu_env *env,
554 struct md_object *obj)
559 static dt_obj_version_t dot_lustre_mdd_version_get(const struct lu_env *env,
560 struct md_object *obj)
565 static void dot_lustre_mdd_version_set(const struct lu_env *env,
566 struct md_object *obj,
567 dt_obj_version_t version)
572 static int dot_lustre_mdd_path(const struct lu_env *env, struct md_object *obj,
573 char *path, int pathlen, __u64 *recno, int *linkno)
578 static int dot_file_lock(const struct lu_env *env, struct md_object *obj,
579 struct lov_mds_md *lmm, struct ldlm_extent *extent,
580 struct lustre_handle *lockh)
585 static int dot_file_unlock(const struct lu_env *env, struct md_object *obj,
586 struct lov_mds_md *lmm, struct lustre_handle *lockh)
591 static struct md_object_operations mdd_dot_lustre_obj_ops = {
592 .moo_permission = dot_lustre_mdd_permission,
593 .moo_attr_get = dot_lustre_mdd_attr_get,
594 .moo_attr_set = dot_lustre_mdd_attr_set,
595 .moo_xattr_get = dot_lustre_mdd_xattr_get,
596 .moo_xattr_list = dot_lustre_mdd_xattr_list,
597 .moo_xattr_set = dot_lustre_mdd_xattr_set,
598 .moo_xattr_del = dot_lustre_mdd_xattr_del,
599 .moo_readpage = mdd_readpage,
600 .moo_readlink = dot_lustre_mdd_readlink,
601 .moo_object_create = dot_lustre_mdd_object_create,
602 .moo_ref_add = dot_lustre_mdd_ref_add,
603 .moo_ref_del = dot_lustre_mdd_ref_del,
604 .moo_open = dot_lustre_mdd_open,
605 .moo_close = dot_lustre_mdd_close,
606 .moo_capa_get = mdd_capa_get,
607 .moo_object_sync = dot_lustre_mdd_object_sync,
608 .moo_version_get = dot_lustre_mdd_version_get,
609 .moo_version_set = dot_lustre_mdd_version_set,
610 .moo_path = dot_lustre_mdd_path,
611 .moo_file_lock = dot_file_lock,
612 .moo_file_unlock = dot_file_unlock,
616 static int dot_lustre_mdd_lookup(const struct lu_env *env, struct md_object *p,
617 const struct lu_name *lname, struct lu_fid *f,
618 struct md_op_spec *spec)
620 if (strcmp(lname->ln_name, mdd_obf_dir_name) == 0)
628 static mdl_mode_t dot_lustre_mdd_lock_mode(const struct lu_env *env,
629 struct md_object *obj,
635 static int dot_lustre_mdd_create(const struct lu_env *env,
636 struct md_object *pobj,
637 const struct lu_name *lname,
638 struct md_object *child,
639 struct md_op_spec *spec,
645 static int dot_lustre_mdd_create_data(const struct lu_env *env,
648 const struct md_op_spec *spec,
654 static int dot_lustre_mdd_rename(const struct lu_env *env,
655 struct md_object *src_pobj,
656 struct md_object *tgt_pobj,
657 const struct lu_fid *lf,
658 const struct lu_name *lsname,
659 struct md_object *tobj,
660 const struct lu_name *ltname,
666 static int dot_lustre_mdd_link(const struct lu_env *env,
667 struct md_object *tgt_obj,
668 struct md_object *src_obj,
669 const struct lu_name *lname,
675 static int dot_lustre_mdd_unlink(const struct lu_env *env,
676 struct md_object *pobj,
677 struct md_object *cobj,
678 const struct lu_name *lname,
684 static int dot_lustre_mdd_name_insert(const struct lu_env *env,
685 struct md_object *obj,
686 const struct lu_name *lname,
687 const struct lu_fid *fid,
688 const struct md_attr *ma)
693 static int dot_lustre_mdd_name_remove(const struct lu_env *env,
694 struct md_object *obj,
695 const struct lu_name *lname,
696 const struct md_attr *ma)
701 static int dot_lustre_mdd_rename_tgt(const struct lu_env *env,
702 struct md_object *pobj,
703 struct md_object *tobj,
704 const struct lu_fid *fid,
705 const struct lu_name *lname,
712 static struct md_dir_operations mdd_dot_lustre_dir_ops = {
713 .mdo_is_subdir = mdd_is_subdir,
714 .mdo_lookup = dot_lustre_mdd_lookup,
715 .mdo_lock_mode = dot_lustre_mdd_lock_mode,
716 .mdo_create = dot_lustre_mdd_create,
717 .mdo_create_data = dot_lustre_mdd_create_data,
718 .mdo_rename = dot_lustre_mdd_rename,
719 .mdo_link = dot_lustre_mdd_link,
720 .mdo_unlink = dot_lustre_mdd_unlink,
721 .mdo_name_insert = dot_lustre_mdd_name_insert,
722 .mdo_name_remove = dot_lustre_mdd_name_remove,
723 .mdo_rename_tgt = dot_lustre_mdd_rename_tgt,
726 static int obf_attr_get(const struct lu_env *env, struct md_object *obj,
731 if (ma->ma_need & MA_INODE) {
732 struct mdd_device *mdd = mdo2mdd(obj);
734 /* "fid" is a virtual object and hence does not have any "real"
735 * attributes. So we reuse attributes of .lustre for "fid" dir */
736 ma->ma_need |= MA_INODE;
737 rc = dot_lustre_mdd_attr_get(env, &mdd->mdd_dot_lustre->mod_obj,
741 ma->ma_valid |= MA_INODE;
744 /* "fid" directory does not have any striping information. */
745 if (ma->ma_need & MA_LOV) {
746 struct mdd_object *mdd_obj = md2mdd_obj(obj);
748 if (ma->ma_valid & MA_LOV)
751 if (!(S_ISREG(mdd_object_type(mdd_obj)) ||
752 S_ISDIR(mdd_object_type(mdd_obj))))
755 if (ma->ma_need & MA_LOV_DEF) {
756 rc = mdd_get_default_md(mdd_obj, ma->ma_lmm);
758 ma->ma_lmm_size = rc;
759 ma->ma_valid |= MA_LOV;
768 static int obf_attr_set(const struct lu_env *env, struct md_object *obj,
769 const struct md_attr *ma)
774 static int obf_xattr_get(const struct lu_env *env,
775 struct md_object *obj, struct lu_buf *buf,
781 static int obf_mdd_open(const struct lu_env *env, struct md_object *obj,
784 struct mdd_object *mdd_obj = md2mdd_obj(obj);
786 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
787 mdd_obj->mod_count++;
788 mdd_write_unlock(env, mdd_obj);
793 static int obf_mdd_close(const struct lu_env *env, struct md_object *obj,
796 struct mdd_object *mdd_obj = md2mdd_obj(obj);
798 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
799 mdd_obj->mod_count--;
800 mdd_write_unlock(env, mdd_obj);
805 /** Nothing to list in "fid" directory */
806 static int obf_mdd_readpage(const struct lu_env *env, struct md_object *obj,
807 const struct lu_rdpg *rdpg)
812 static int obf_path(const struct lu_env *env, struct md_object *obj,
813 char *path, int pathlen, __u64 *recno, int *linkno)
818 static struct md_object_operations mdd_obf_obj_ops = {
819 .moo_attr_get = obf_attr_get,
820 .moo_attr_set = obf_attr_set,
821 .moo_xattr_get = obf_xattr_get,
822 .moo_open = obf_mdd_open,
823 .moo_close = obf_mdd_close,
824 .moo_readpage = obf_mdd_readpage,
829 * Lookup method for "fid" object. Only filenames with correct SEQ:OID format
830 * are valid. We also check if object with passed fid exists or not.
832 static int obf_lookup(const struct lu_env *env, struct md_object *p,
833 const struct lu_name *lname, struct lu_fid *f,
834 struct md_op_spec *spec)
836 char *name = (char *)lname->ln_name;
837 struct mdd_device *mdd = mdo2mdd(p);
838 struct mdd_object *child;
844 sscanf(name, SFID, RFID(f));
845 if (!fid_is_sane(f)) {
846 CWARN("bad FID format [%s], should be "DFID"\n", lname->ln_name,
848 GOTO(out, rc = -EINVAL);
851 /* Check if object with this fid exists */
852 child = mdd_object_find(env, mdd, f);
856 GOTO(out, rc = PTR_ERR(child));
858 if (mdd_object_exists(child) == 0)
861 mdd_object_put(env, child);
867 static int obf_create(const struct lu_env *env, struct md_object *pobj,
868 const struct lu_name *lname, struct md_object *child,
869 struct md_op_spec *spec, struct md_attr* ma)
874 static int obf_rename(const struct lu_env *env,
875 struct md_object *src_pobj, struct md_object *tgt_pobj,
876 const struct lu_fid *lf, const struct lu_name *lsname,
877 struct md_object *tobj, const struct lu_name *ltname,
883 static int obf_link(const struct lu_env *env, struct md_object *tgt_obj,
884 struct md_object *src_obj, const struct lu_name *lname,
890 static int obf_unlink(const struct lu_env *env, struct md_object *pobj,
891 struct md_object *cobj, const struct lu_name *lname,
897 static struct md_dir_operations mdd_obf_dir_ops = {
898 .mdo_lookup = obf_lookup,
899 .mdo_create = obf_create,
900 .mdo_rename = obf_rename,
901 .mdo_link = obf_link,
902 .mdo_unlink = obf_unlink
906 * Create special in-memory "fid" object for open-by-fid.
908 static int mdd_obf_setup(const struct lu_env *env, struct mdd_device *m)
910 struct mdd_object *mdd_obf;
911 struct lu_object *obf_lu_obj;
914 m->mdd_dot_lustre_objs.mdd_obf = mdd_object_find(env, m,
916 if (m->mdd_dot_lustre_objs.mdd_obf == NULL ||
917 IS_ERR(m->mdd_dot_lustre_objs.mdd_obf))
918 GOTO(out, rc = -ENOENT);
920 mdd_obf = m->mdd_dot_lustre_objs.mdd_obf;
921 mdd_obf->mod_obj.mo_dir_ops = &mdd_obf_dir_ops;
922 mdd_obf->mod_obj.mo_ops = &mdd_obf_obj_ops;
923 /* Don't allow objects to be created in "fid" dir */
924 mdd_obf->mod_flags |= IMMUTE_OBJ;
926 obf_lu_obj = mdd2lu_obj(mdd_obf);
927 obf_lu_obj->lo_header->loh_attr |= (LOHA_EXISTS | S_IFDIR);
933 /** Setup ".lustre" directory object */
934 static int mdd_dot_lustre_setup(const struct lu_env *env, struct mdd_device *m)
936 struct dt_object *dt_dot_lustre;
937 struct lu_fid *fid = &mdd_env_info(env)->mti_fid;
940 rc = create_dot_lustre_dir(env, m);
944 dt_dot_lustre = dt_store_open(env, m->mdd_child, mdd_root_dir_name,
945 dot_lustre_name, fid);
946 if (IS_ERR(dt_dot_lustre)) {
947 rc = PTR_ERR(dt_dot_lustre);
951 /* references are released in mdd_device_shutdown() */
952 m->mdd_dot_lustre = lu2mdd_obj(lu_object_locate(dt_dot_lustre->do_lu.lo_header,
955 m->mdd_dot_lustre->mod_obj.mo_dir_ops = &mdd_dot_lustre_dir_ops;
956 m->mdd_dot_lustre->mod_obj.mo_ops = &mdd_dot_lustre_obj_ops;
958 rc = mdd_obf_setup(env, m);
960 CERROR("Error initializing \"fid\" object - %d.\n", rc);
966 static int mdd_process_config(const struct lu_env *env,
967 struct lu_device *d, struct lustre_cfg *cfg)
969 struct mdd_device *m = lu2mdd_dev(d);
970 struct dt_device *dt = m->mdd_child;
971 struct lu_device *next = &dt->dd_lu_dev;
975 switch (cfg->lcfg_command) {
977 struct lprocfs_static_vars lvars;
979 lprocfs_mdd_init_vars(&lvars);
980 rc = class_process_proc_param(PARAM_MDD, lvars.obd_vars, cfg,m);
981 if (rc > 0 || rc == -ENOSYS)
982 /* we don't understand; pass it on */
983 rc = next->ld_ops->ldo_process_config(env, next, cfg);
987 rc = next->ld_ops->ldo_process_config(env, next, cfg);
990 dt->dd_ops->dt_conf_get(env, dt, &m->mdd_dt_conf);
992 rc = mdd_init_obd(env, m, cfg);
994 CERROR("lov init error %d \n", rc);
997 rc = mdd_txn_init_credits(env, m);
1001 mdd_changelog_init(env, m);
1004 mdd_device_shutdown(env, m, cfg);
1006 rc = next->ld_ops->ldo_process_config(env, next, cfg);
1014 static int mdd_lov_set_nextid(const struct lu_env *env,
1015 struct mdd_device *mdd)
1017 struct mds_obd *mds = &mdd->mdd_obd_dev->u.mds;
1021 LASSERT(mds->mds_lov_objids != NULL);
1022 rc = obd_set_info_async(mds->mds_lov_exp, strlen(KEY_NEXT_ID),
1023 KEY_NEXT_ID, mds->mds_lov_desc.ld_tgt_count,
1024 mds->mds_lov_objids, NULL);
1029 static int mdd_cleanup_unlink_llog(const struct lu_env *env,
1030 struct mdd_device *mdd)
1032 /* XXX: to be implemented! */
1037 static int mdd_recovery_complete(const struct lu_env *env,
1038 struct lu_device *d)
1040 struct mdd_device *mdd = lu2mdd_dev(d);
1041 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
1042 struct obd_device *obd = mdd2obd_dev(mdd);
1046 LASSERT(mdd != NULL);
1047 LASSERT(obd != NULL);
1049 /* XXX: Do we need this in new stack? */
1050 rc = mdd_lov_set_nextid(env, mdd);
1052 CERROR("mdd_lov_set_nextid() failed %d\n",
1057 /* XXX: cleanup unlink. */
1058 rc = mdd_cleanup_unlink_llog(env, mdd);
1060 CERROR("mdd_cleanup_unlink_llog() failed %d\n",
1065 /* Call that with obd_recovering = 1 just to update objids */
1066 obd_notify(obd->u.mds.mds_lov_obd, NULL, (obd->obd_async_recov ?
1067 OBD_NOTIFY_SYNC_NONBLOCK : OBD_NOTIFY_SYNC), NULL);
1069 /* Drop obd_recovering to 0 and call o_postrecov to recover mds_lov */
1070 cfs_spin_lock(&obd->obd_dev_lock);
1071 obd->obd_recovering = 0;
1072 cfs_spin_unlock(&obd->obd_dev_lock);
1073 obd->obd_type->typ_dt_ops->o_postrecov(obd);
1075 /* XXX: orphans handling. */
1076 __mdd_orphan_cleanup(env, mdd);
1077 rc = next->ld_ops->ldo_recovery_complete(env, next);
1082 static int mdd_prepare(const struct lu_env *env,
1083 struct lu_device *pdev,
1084 struct lu_device *cdev)
1086 struct mdd_device *mdd = lu2mdd_dev(cdev);
1087 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
1088 struct dt_object *root;
1092 rc = next->ld_ops->ldo_prepare(env, cdev, next);
1096 dt_txn_callback_add(mdd->mdd_child, &mdd->mdd_txn_cb);
1097 root = dt_store_open(env, mdd->mdd_child, "", mdd_root_dir_name,
1098 &mdd->mdd_root_fid);
1099 if (!IS_ERR(root)) {
1100 LASSERT(root != NULL);
1101 lu_object_put(env, &root->do_lu);
1102 rc = orph_index_init(env, mdd);
1109 rc = mdd_dot_lustre_setup(env, mdd);
1111 CERROR("Error(%d) initializing .lustre objects\n", rc);
1119 const struct lu_device_operations mdd_lu_ops = {
1120 .ldo_object_alloc = mdd_object_alloc,
1121 .ldo_process_config = mdd_process_config,
1122 .ldo_recovery_complete = mdd_recovery_complete,
1123 .ldo_prepare = mdd_prepare,
1127 * No permission check is needed.
1129 static int mdd_root_get(const struct lu_env *env,
1130 struct md_device *m, struct lu_fid *f)
1132 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1135 *f = mdd->mdd_root_fid;
1140 * No permission check is needed.
1142 static int mdd_statfs(const struct lu_env *env, struct md_device *m,
1145 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1150 rc = mdd_child_ops(mdd)->dt_statfs(env, mdd->mdd_child, sfs);
1156 * No permission check is needed.
1158 static int mdd_maxsize_get(const struct lu_env *env, struct md_device *m,
1159 int *md_size, int *cookie_size)
1161 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1164 *md_size = mdd_lov_mdsize(env, mdd);
1165 *cookie_size = mdd_lov_cookiesize(env, mdd);
1170 static int mdd_init_capa_ctxt(const struct lu_env *env, struct md_device *m,
1171 int mode, unsigned long timeout, __u32 alg,
1172 struct lustre_capa_key *keys)
1174 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1175 struct mds_obd *mds = &mdd2obd_dev(mdd)->u.mds;
1179 /* need barrier for mds_capa_keys access. */
1180 cfs_down_write(&mds->mds_notify_lock);
1181 mds->mds_capa_keys = keys;
1182 cfs_up_write(&mds->mds_notify_lock);
1184 rc = mdd_child_ops(mdd)->dt_init_capa_ctxt(env, mdd->mdd_child, mode,
1185 timeout, alg, keys);
1189 static int mdd_update_capa_key(const struct lu_env *env,
1190 struct md_device *m,
1191 struct lustre_capa_key *key)
1193 struct mds_capa_info info = { .uuid = NULL, .capa = key };
1194 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1195 struct obd_export *lov_exp = mdd2obd_dev(mdd)->u.mds.mds_lov_exp;
1199 rc = obd_set_info_async(lov_exp, sizeof(KEY_CAPA_KEY), KEY_CAPA_KEY,
1200 sizeof(info), &info, NULL);
1204 static int mdd_llog_ctxt_get(const struct lu_env *env, struct md_device *m,
1207 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1209 *h = llog_group_get_ctxt(&mdd2obd_dev(mdd)->obd_olg, idx);
1210 return (*h == NULL ? -ENOENT : 0);
1213 static struct lu_device *mdd_device_alloc(const struct lu_env *env,
1214 struct lu_device_type *t,
1215 struct lustre_cfg *lcfg)
1217 struct lu_device *l;
1218 struct mdd_device *m;
1222 l = ERR_PTR(-ENOMEM);
1224 md_device_init(&m->mdd_md_dev, t);
1226 l->ld_ops = &mdd_lu_ops;
1227 m->mdd_md_dev.md_ops = &mdd_ops;
1228 md_upcall_init(&m->mdd_md_dev, NULL);
1234 static struct lu_device *mdd_device_free(const struct lu_env *env,
1235 struct lu_device *lu)
1237 struct mdd_device *m = lu2mdd_dev(lu);
1238 struct lu_device *next = &m->mdd_child->dd_lu_dev;
1241 LASSERT(cfs_atomic_read(&lu->ld_ref) == 0);
1242 md_device_fini(&m->mdd_md_dev);
1247 static struct obd_ops mdd_obd_device_ops = {
1248 .o_owner = THIS_MODULE
1251 /* context key constructor/destructor: mdd_ucred_key_init, mdd_ucred_key_fini */
1252 LU_KEY_INIT_FINI(mdd_ucred, struct md_ucred);
1254 static struct lu_context_key mdd_ucred_key = {
1255 .lct_tags = LCT_SESSION,
1256 .lct_init = mdd_ucred_key_init,
1257 .lct_fini = mdd_ucred_key_fini
1260 struct md_ucred *md_ucred(const struct lu_env *env)
1262 LASSERT(env->le_ses != NULL);
1263 return lu_context_key_get(env->le_ses, &mdd_ucred_key);
1265 EXPORT_SYMBOL(md_ucred);
1268 * context key constructor/destructor:
1269 * mdd_capainfo_key_init, mdd_capainfo_key_fini
1271 LU_KEY_INIT_FINI(mdd_capainfo, struct md_capainfo);
1273 struct lu_context_key mdd_capainfo_key = {
1274 .lct_tags = LCT_SESSION,
1275 .lct_init = mdd_capainfo_key_init,
1276 .lct_fini = mdd_capainfo_key_fini
1279 struct md_capainfo *md_capainfo(const struct lu_env *env)
1281 /* NB, in mdt_init0 */
1282 if (env->le_ses == NULL)
1284 return lu_context_key_get(env->le_ses, &mdd_capainfo_key);
1286 EXPORT_SYMBOL(md_capainfo);
1289 * context key constructor/destructor:
1290 * mdd_quota_key_init, mdd_quota_key_fini
1292 LU_KEY_INIT_FINI(mdd_quota, struct md_quota);
1294 struct lu_context_key mdd_quota_key = {
1295 .lct_tags = LCT_SESSION,
1296 .lct_init = mdd_quota_key_init,
1297 .lct_fini = mdd_quota_key_fini
1300 struct md_quota *md_quota(const struct lu_env *env)
1302 LASSERT(env->le_ses != NULL);
1303 return lu_context_key_get(env->le_ses, &mdd_quota_key);
1305 EXPORT_SYMBOL(md_quota);
1307 static int mdd_changelog_user_register(struct mdd_device *mdd, int *id)
1309 struct llog_ctxt *ctxt;
1310 struct llog_changelog_user_rec *rec;
1314 ctxt = llog_get_context(mdd2obd_dev(mdd),LLOG_CHANGELOG_USER_ORIG_CTXT);
1320 llog_ctxt_put(ctxt);
1324 /* Assume we want it on since somebody registered */
1325 rc = mdd_changelog_on(mdd, 1);
1329 rec->cur_hdr.lrh_len = sizeof(*rec);
1330 rec->cur_hdr.lrh_type = CHANGELOG_USER_REC;
1331 cfs_spin_lock(&mdd->mdd_cl.mc_user_lock);
1332 if (mdd->mdd_cl.mc_lastuser == (unsigned int)(-1)) {
1333 cfs_spin_unlock(&mdd->mdd_cl.mc_user_lock);
1334 CERROR("Maximum number of changelog users exceeded!\n");
1335 GOTO(out, rc = -EOVERFLOW);
1337 *id = rec->cur_id = ++mdd->mdd_cl.mc_lastuser;
1338 rec->cur_endrec = mdd->mdd_cl.mc_index;
1339 cfs_spin_unlock(&mdd->mdd_cl.mc_user_lock);
1341 rc = llog_add(ctxt, &rec->cur_hdr, NULL, NULL, 0);
1343 CDEBUG(D_IOCTL, "Registered changelog user %d\n", *id);
1346 llog_ctxt_put(ctxt);
1350 struct mdd_changelog_user_data {
1351 __u64 mcud_endrec; /**< purge record for this user */
1352 __u64 mcud_minrec; /**< lowest changelog recno still referenced */
1354 __u32 mcud_minid; /**< user id with lowest rec reference */
1355 __u32 mcud_usercount;
1358 #define MCUD_UNREGISTER -1LL
1361 * 1. Find the smallest record everyone is willing to purge
1362 * 2. Update the last purgeable record for this user
1364 static int mdd_changelog_user_purge_cb(struct llog_handle *llh,
1365 struct llog_rec_hdr *hdr, void *data)
1367 struct llog_changelog_user_rec *rec;
1368 struct mdd_changelog_user_data *mcud =
1369 (struct mdd_changelog_user_data *)data;
1373 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
1375 rec = (struct llog_changelog_user_rec *)hdr;
1377 mcud->mcud_usercount++;
1379 /* If we have a new endrec for this id, use it for the following
1380 min check instead of its old value */
1381 if (rec->cur_id == mcud->mcud_id)
1382 rec->cur_endrec = max(rec->cur_endrec, mcud->mcud_endrec);
1384 /* Track the minimum referenced record */
1385 if (mcud->mcud_minid == 0 || mcud->mcud_minrec > rec->cur_endrec) {
1386 mcud->mcud_minid = rec->cur_id;
1387 mcud->mcud_minrec = rec->cur_endrec;
1390 if (rec->cur_id != mcud->mcud_id)
1393 /* Update this user's record */
1394 mcud->mcud_found = 1;
1396 /* Special case: unregister this user */
1397 if (mcud->mcud_endrec == MCUD_UNREGISTER) {
1398 struct llog_cookie cookie;
1399 cookie.lgc_lgl = llh->lgh_id;
1400 cookie.lgc_index = hdr->lrh_index;
1401 rc = llog_cat_cancel_records(llh->u.phd.phd_cat_handle,
1404 mcud->mcud_usercount--;
1408 /* Update the endrec */
1409 CDEBUG(D_IOCTL, "Rewriting changelog user %d endrec to "LPU64"\n",
1410 mcud->mcud_id, rec->cur_endrec);
1412 /* hdr+1 is loc of data */
1413 hdr->lrh_len -= sizeof(*hdr) + sizeof(struct llog_rec_tail);
1414 rc = llog_write_rec(llh, hdr, NULL, 0, (void *)(hdr + 1),
1420 static int mdd_changelog_user_purge(struct mdd_device *mdd, int id,
1423 struct mdd_changelog_user_data data;
1424 struct llog_ctxt *ctxt;
1428 CDEBUG(D_IOCTL, "Purge request: id=%d, endrec=%lld\n", id, endrec);
1431 data.mcud_minid = 0;
1432 data.mcud_minrec = 0;
1433 data.mcud_usercount = 0;
1434 data.mcud_endrec = endrec;
1435 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
1436 endrec = mdd->mdd_cl.mc_index;
1437 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
1438 if ((data.mcud_endrec == 0) ||
1439 ((data.mcud_endrec > endrec) &&
1440 (data.mcud_endrec != MCUD_UNREGISTER)))
1441 data.mcud_endrec = endrec;
1443 ctxt = llog_get_context(mdd2obd_dev(mdd),LLOG_CHANGELOG_USER_ORIG_CTXT);
1446 LASSERT(ctxt->loc_handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
1448 rc = llog_cat_process(ctxt->loc_handle, mdd_changelog_user_purge_cb,
1449 (void *)&data, 0, 0);
1450 if ((rc >= 0) && (data.mcud_minrec > 0)) {
1451 CDEBUG(D_IOCTL, "Purging changelog entries up to "LPD64
1452 ", referenced by "CHANGELOG_USER_PREFIX"%d\n",
1453 data.mcud_minrec, data.mcud_minid);
1454 rc = mdd_changelog_llog_cancel(mdd, data.mcud_minrec);
1456 CWARN("Could not determine changelog records to purge; rc=%d\n",
1460 llog_ctxt_put(ctxt);
1462 if (!data.mcud_found) {
1463 CWARN("No entry for user %d. Last changelog reference is "
1464 LPD64" by changelog user %d\n", data.mcud_id,
1465 data.mcud_minrec, data.mcud_minid);
1469 if (!rc && data.mcud_usercount == 0)
1470 /* No more users; turn changelogs off */
1471 rc = mdd_changelog_on(mdd, 0);
1477 * May be called remotely from mdt_iocontrol_handle or locally from
1478 * mdt_iocontrol. Data may be freeform - remote handling doesn't enforce
1479 * an obd_ioctl_data format (but local ioctl handler does).
1481 * \param len - data len
1482 * \param karg - ioctl data, in kernel space
1484 static int mdd_iocontrol(const struct lu_env *env, struct md_device *m,
1485 unsigned int cmd, int len, void *karg)
1487 struct mdd_device *mdd;
1488 struct obd_ioctl_data *data = karg;
1492 mdd = lu2mdd_dev(&m->md_lu_dev);
1494 /* Doesn't use obd_ioctl_data */
1495 if (cmd == OBD_IOC_CHANGELOG_CLEAR) {
1496 struct changelog_setinfo *cs = karg;
1497 rc = mdd_changelog_user_purge(mdd, cs->cs_id, cs->cs_recno);
1501 /* Below ioctls use obd_ioctl_data */
1502 if (len != sizeof(*data)) {
1503 CERROR("Bad ioctl size %d\n", len);
1506 if (data->ioc_version != OBD_IOCTL_VERSION) {
1507 CERROR("Bad magic %x != %x\n", data->ioc_version,
1513 case OBD_IOC_CHANGELOG_REG:
1514 rc = mdd_changelog_user_register(mdd, &data->ioc_u32_1);
1516 case OBD_IOC_CHANGELOG_DEREG:
1517 rc = mdd_changelog_user_purge(mdd, data->ioc_u32_1,
1527 /* type constructor/destructor: mdd_type_init, mdd_type_fini */
1528 LU_TYPE_INIT_FINI(mdd, &mdd_thread_key, &mdd_ucred_key, &mdd_capainfo_key,
1531 const struct md_device_operations mdd_ops = {
1532 .mdo_statfs = mdd_statfs,
1533 .mdo_root_get = mdd_root_get,
1534 .mdo_maxsize_get = mdd_maxsize_get,
1535 .mdo_init_capa_ctxt = mdd_init_capa_ctxt,
1536 .mdo_update_capa_key= mdd_update_capa_key,
1537 .mdo_llog_ctxt_get = mdd_llog_ctxt_get,
1538 .mdo_iocontrol = mdd_iocontrol,
1539 #ifdef HAVE_QUOTA_SUPPORT
1541 .mqo_notify = mdd_quota_notify,
1542 .mqo_setup = mdd_quota_setup,
1543 .mqo_cleanup = mdd_quota_cleanup,
1544 .mqo_recovery = mdd_quota_recovery,
1545 .mqo_check = mdd_quota_check,
1546 .mqo_on = mdd_quota_on,
1547 .mqo_off = mdd_quota_off,
1548 .mqo_setinfo = mdd_quota_setinfo,
1549 .mqo_getinfo = mdd_quota_getinfo,
1550 .mqo_setquota = mdd_quota_setquota,
1551 .mqo_getquota = mdd_quota_getquota,
1552 .mqo_getoinfo = mdd_quota_getoinfo,
1553 .mqo_getoquota = mdd_quota_getoquota,
1554 .mqo_invalidate = mdd_quota_invalidate,
1555 .mqo_finvalidate = mdd_quota_finvalidate
1560 static struct lu_device_type_operations mdd_device_type_ops = {
1561 .ldto_init = mdd_type_init,
1562 .ldto_fini = mdd_type_fini,
1564 .ldto_start = mdd_type_start,
1565 .ldto_stop = mdd_type_stop,
1567 .ldto_device_alloc = mdd_device_alloc,
1568 .ldto_device_free = mdd_device_free,
1570 .ldto_device_init = mdd_device_init,
1571 .ldto_device_fini = mdd_device_fini
1574 static struct lu_device_type mdd_device_type = {
1575 .ldt_tags = LU_DEVICE_MD,
1576 .ldt_name = LUSTRE_MDD_NAME,
1577 .ldt_ops = &mdd_device_type_ops,
1578 .ldt_ctx_tags = LCT_MD_THREAD
1581 /* context key constructor: mdd_key_init */
1582 LU_KEY_INIT(mdd, struct mdd_thread_info);
1584 static void mdd_key_fini(const struct lu_context *ctx,
1585 struct lu_context_key *key, void *data)
1587 struct mdd_thread_info *info = data;
1588 if (info->mti_max_lmm != NULL)
1589 OBD_FREE(info->mti_max_lmm, info->mti_max_lmm_size);
1590 if (info->mti_max_cookie != NULL)
1591 OBD_FREE(info->mti_max_cookie, info->mti_max_cookie_size);
1592 mdd_buf_put(&info->mti_big_buf);
1597 /* context key: mdd_thread_key */
1598 LU_CONTEXT_KEY_DEFINE(mdd, LCT_MD_THREAD);
1600 static struct lu_local_obj_desc llod_capa_key = {
1601 .llod_name = CAPA_KEYS,
1602 .llod_oid = MDD_CAPA_KEYS_OID,
1606 static struct lu_local_obj_desc llod_mdd_orphan = {
1607 .llod_name = orph_index_name,
1608 .llod_oid = MDD_ORPHAN_OID,
1610 .llod_feat = &dt_directory_features,
1613 static struct lu_local_obj_desc llod_mdd_root = {
1614 .llod_name = mdd_root_dir_name,
1615 .llod_oid = MDD_ROOT_INDEX_OID,
1617 .llod_feat = &dt_directory_features,
1620 static int __init mdd_mod_init(void)
1622 struct lprocfs_static_vars lvars;
1623 lprocfs_mdd_init_vars(&lvars);
1625 llo_local_obj_register(&llod_capa_key);
1626 llo_local_obj_register(&llod_mdd_orphan);
1627 llo_local_obj_register(&llod_mdd_root);
1629 return class_register_type(&mdd_obd_device_ops, NULL, lvars.module_vars,
1630 LUSTRE_MDD_NAME, &mdd_device_type);
1633 static void __exit mdd_mod_exit(void)
1635 llo_local_obj_unregister(&llod_capa_key);
1636 llo_local_obj_unregister(&llod_mdd_orphan);
1637 llo_local_obj_unregister(&llod_mdd_root);
1639 class_unregister_type(LUSTRE_MDD_NAME);
1642 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
1643 MODULE_DESCRIPTION("Lustre Meta-data Device Prototype ("LUSTRE_MDD_NAME")");
1644 MODULE_LICENSE("GPL");
1646 cfs_module(mdd, "0.1.0", mdd_mod_init, mdd_mod_exit);