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, Whamcloud, Inc.
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 <ldiskfs/ldiskfs_jbd2.h>
48 #include <obd_class.h>
49 #include <lustre_ver.h>
50 #include <obd_support.h>
51 #include <lprocfs_status.h>
53 #include <lustre_disk.h>
54 #include <lustre_fid.h>
55 #include <ldiskfs/ldiskfs.h>
56 #include <lustre_mds.h>
57 #include <lustre/lustre_idl.h>
58 #include <lustre_disk.h> /* for changelogs */
59 #include <lustre_param.h>
60 #include <lustre_fid.h>
62 #include "mdd_internal.h"
64 const struct md_device_operations mdd_ops;
65 static struct lu_device_type mdd_device_type;
67 static const char mdd_root_dir_name[] = "ROOT";
68 static const char mdd_obf_dir_name[] = "fid";
70 static int mdd_device_init(const struct lu_env *env, struct lu_device *d,
71 const char *name, struct lu_device *next)
73 struct mdd_device *mdd = lu2mdd_dev(d);
77 mdd->mdd_child = lu2dt_dev(next);
79 /* Prepare transactions callbacks. */
80 mdd->mdd_txn_cb.dtc_txn_start = NULL;
81 mdd->mdd_txn_cb.dtc_txn_stop = mdd_txn_stop_cb;
82 mdd->mdd_txn_cb.dtc_txn_commit = NULL;
83 mdd->mdd_txn_cb.dtc_cookie = mdd;
84 mdd->mdd_txn_cb.dtc_tag = LCT_MD_THREAD;
85 CFS_INIT_LIST_HEAD(&mdd->mdd_txn_cb.dtc_linkage);
86 mdd->mdd_atime_diff = MAX_ATIME_DIFF;
87 /* sync permission changes */
88 mdd->mdd_sync_permission = 1;
90 rc = mdd_procfs_init(mdd, name);
94 static struct lu_device *mdd_device_fini(const struct lu_env *env,
97 struct mdd_device *mdd = lu2mdd_dev(d);
98 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
101 rc = mdd_procfs_fini(mdd);
103 CERROR("proc fini error %d \n", rc);
109 static void mdd_changelog_fini(const struct lu_env *env,
110 struct mdd_device *mdd);
112 static void mdd_device_shutdown(const struct lu_env *env,
113 struct mdd_device *m, struct lustre_cfg *cfg)
116 mdd_changelog_fini(env, m);
117 dt_txn_callback_del(m->mdd_child, &m->mdd_txn_cb);
118 if (m->mdd_dot_lustre_objs.mdd_obf)
119 mdd_object_put(env, m->mdd_dot_lustre_objs.mdd_obf);
120 if (m->mdd_dot_lustre)
121 mdd_object_put(env, m->mdd_dot_lustre);
123 mdd_fini_obd(env, m, cfg);
124 orph_index_fini(env, m);
125 if (m->mdd_capa != NULL) {
126 lu_object_put(env, &m->mdd_capa->do_lu);
129 /* remove upcall device*/
130 md_upcall_fini(&m->mdd_md_dev);
134 static int changelog_init_cb(struct llog_handle *llh, struct llog_rec_hdr *hdr,
137 struct mdd_device *mdd = (struct mdd_device *)data;
138 struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
141 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
142 LASSERT(rec->cr_hdr.lrh_type == CHANGELOG_REC);
145 "seeing record at index %d/%d/"LPU64" t=%x %.*s in log "LPX64"\n",
146 hdr->lrh_index, rec->cr_hdr.lrh_index, rec->cr.cr_index,
147 rec->cr.cr_type, rec->cr.cr_namelen, rec->cr.cr_name,
148 llh->lgh_id.lgl_oid);
150 mdd->mdd_cl.mc_index = rec->cr.cr_index;
151 RETURN(LLOG_PROC_BREAK);
154 static int changelog_user_init_cb(struct llog_handle *llh,
155 struct llog_rec_hdr *hdr, void *data)
157 struct mdd_device *mdd = (struct mdd_device *)data;
158 struct llog_changelog_user_rec *rec =
159 (struct llog_changelog_user_rec *)hdr;
162 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
163 LASSERT(rec->cur_hdr.lrh_type == CHANGELOG_USER_REC);
165 CDEBUG(D_INFO, "seeing user at index %d/%d id=%d endrec="LPU64
166 " in log "LPX64"\n", hdr->lrh_index, rec->cur_hdr.lrh_index,
167 rec->cur_id, rec->cur_endrec, llh->lgh_id.lgl_oid);
169 cfs_spin_lock(&mdd->mdd_cl.mc_user_lock);
170 mdd->mdd_cl.mc_lastuser = rec->cur_id;
171 cfs_spin_unlock(&mdd->mdd_cl.mc_user_lock);
173 RETURN(LLOG_PROC_BREAK);
177 static int mdd_changelog_llog_init(struct mdd_device *mdd)
179 struct obd_device *obd = mdd2obd_dev(mdd);
180 struct llog_ctxt *ctxt;
183 /* Find last changelog entry number */
184 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
186 CERROR("no changelog context\n");
189 if (!ctxt->loc_handle) {
194 rc = llog_cat_reverse_process(ctxt->loc_handle, changelog_init_cb, mdd);
198 CERROR("changelog init failed: %d\n", rc);
201 CDEBUG(D_IOCTL, "changelog starting index="LPU64"\n",
202 mdd->mdd_cl.mc_index);
204 /* Find last changelog user id */
205 ctxt = llog_get_context(obd, LLOG_CHANGELOG_USER_ORIG_CTXT);
207 CERROR("no changelog user context\n");
210 if (!ctxt->loc_handle) {
215 rc = llog_cat_reverse_process(ctxt->loc_handle, changelog_user_init_cb,
220 CERROR("changelog user init failed: %d\n", rc);
224 /* If we have registered users, assume we want changelogs on */
225 if (mdd->mdd_cl.mc_lastuser > 0)
226 rc = mdd_changelog_on(mdd, 1);
231 static int mdd_changelog_init(const struct lu_env *env, struct mdd_device *mdd)
235 mdd->mdd_cl.mc_index = 0;
236 cfs_spin_lock_init(&mdd->mdd_cl.mc_lock);
237 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
238 mdd->mdd_cl.mc_flags = 0; /* off by default */
239 mdd->mdd_cl.mc_mask = CHANGELOG_DEFMASK;
240 cfs_spin_lock_init(&mdd->mdd_cl.mc_user_lock);
241 mdd->mdd_cl.mc_lastuser = 0;
243 rc = mdd_changelog_llog_init(mdd);
245 CERROR("Changelog setup during init failed %d\n", rc);
246 mdd->mdd_cl.mc_flags |= CLM_ERR;
252 static void mdd_changelog_fini(const struct lu_env *env, struct mdd_device *mdd)
254 mdd->mdd_cl.mc_flags = 0;
257 /* Start / stop recording */
258 int mdd_changelog_on(struct mdd_device *mdd, int on)
262 if ((on == 1) && ((mdd->mdd_cl.mc_flags & CLM_ON) == 0)) {
263 LCONSOLE_INFO("%s: changelog on\n", mdd2obd_dev(mdd)->obd_name);
264 if (mdd->mdd_cl.mc_flags & CLM_ERR) {
265 CERROR("Changelogs cannot be enabled due to error "
266 "condition (see %s log).\n",
267 mdd2obd_dev(mdd)->obd_name);
270 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
271 mdd->mdd_cl.mc_flags |= CLM_ON;
272 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
273 rc = mdd_changelog_write_header(mdd, CLM_START);
275 } else if ((on == 0) && ((mdd->mdd_cl.mc_flags & CLM_ON) == CLM_ON)) {
276 LCONSOLE_INFO("%s: changelog off\n",mdd2obd_dev(mdd)->obd_name);
277 rc = mdd_changelog_write_header(mdd, CLM_FINI);
278 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
279 mdd->mdd_cl.mc_flags &= ~CLM_ON;
280 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
285 static __u64 cl_time(void) {
288 cfs_fs_time_current(&time);
289 return (((__u64)time.tv_sec) << 30) + time.tv_nsec;
292 /** Add a changelog entry \a rec to the changelog llog
295 * \param handle - currently ignored since llogs start their own transaction;
296 * this will hopefully be fixed in llog rewrite
299 int mdd_changelog_llog_write(struct mdd_device *mdd,
300 struct llog_changelog_rec *rec,
301 struct thandle *handle)
303 struct obd_device *obd = mdd2obd_dev(mdd);
304 struct llog_ctxt *ctxt;
307 rec->cr_hdr.lrh_len = llog_data_len(sizeof(*rec) + rec->cr.cr_namelen);
308 /* llog_lvfs_write_rec sets the llog tail len */
309 rec->cr_hdr.lrh_type = CHANGELOG_REC;
310 rec->cr.cr_time = cl_time();
311 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
312 /* NB: I suppose it's possible llog_add adds out of order wrt cr_index,
313 but as long as the MDD transactions are ordered correctly for e.g.
314 rename conflicts, I don't think this should matter. */
315 rec->cr.cr_index = ++mdd->mdd_cl.mc_index;
316 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
317 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
321 /* nested journal transaction */
322 rc = llog_add(ctxt, &rec->cr_hdr, NULL, NULL, 0);
328 /** Remove entries with indicies up to and including \a endrec from the
334 int mdd_changelog_llog_cancel(struct mdd_device *mdd, long long endrec)
336 struct obd_device *obd = mdd2obd_dev(mdd);
337 struct llog_ctxt *ctxt;
338 long long unsigned cur;
341 ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
345 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
346 cur = (long long)mdd->mdd_cl.mc_index;
347 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
351 /* purge to "0" is shorthand for everything */
355 /* If purging all records, write a header entry so we don't have an
356 empty catalog and we're sure to have a valid starting index next
357 time. In case of crash, we just restart with old log so we're
360 /* XXX: transaction is started by llog itself */
361 rc = mdd_changelog_write_header(mdd, CLM_PURGE);
366 /* Some records were purged, so reset repeat-access time (so we
367 record new mtime update records, so users can see a file has been
368 changed since the last purge) */
369 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
371 /* XXX: transaction is started by llog itself */
372 rc = llog_cancel(ctxt, NULL, 1, (struct llog_cookie *)&endrec, 0);
378 /** Add a CL_MARK record to the changelog
380 * \param markerflags - CLM_*
383 int mdd_changelog_write_header(struct mdd_device *mdd, int markerflags)
385 struct obd_device *obd = mdd2obd_dev(mdd);
386 struct llog_changelog_rec *rec;
388 int len = strlen(obd->obd_name);
392 reclen = llog_data_len(sizeof(*rec) + len);
393 OBD_ALLOC(rec, reclen);
397 rec->cr.cr_flags = CLF_VERSION;
398 rec->cr.cr_type = CL_MARK;
399 rec->cr.cr_namelen = len;
400 memcpy(rec->cr.cr_name, obd->obd_name, rec->cr.cr_namelen);
401 /* Status and action flags */
402 rec->cr.cr_markerflags = mdd->mdd_cl.mc_flags | markerflags;
404 /* XXX: transaction is started by llog itself */
405 rc = (mdd->mdd_cl.mc_mask & (1 << CL_MARK)) ?
406 mdd_changelog_llog_write(mdd, rec, NULL) : 0;
408 /* assume on or off event; reset repeat-access time */
409 mdd->mdd_cl.mc_starttime = cfs_time_current_64();
411 OBD_FREE(rec, reclen);
416 * Create ".lustre" directory.
418 static int create_dot_lustre_dir(const struct lu_env *env, struct mdd_device *m)
420 struct lu_fid *fid = &mdd_env_info(env)->mti_fid;
421 struct md_object *mdo;
424 memcpy(fid, &LU_DOT_LUSTRE_FID, sizeof(struct lu_fid));
425 mdo = llo_store_create_index(env, &m->mdd_md_dev, m->mdd_child,
426 mdd_root_dir_name, dot_lustre_name,
427 fid, &dt_directory_features);
428 /* .lustre dir may be already present */
429 if (IS_ERR(mdo) && PTR_ERR(mdo) != -EEXIST) {
431 CERROR("creating obj [%s] fid = "DFID" rc = %d\n",
432 dot_lustre_name, PFID(fid), rc);
437 lu_object_put(env, &mdo->mo_lu);
443 static int dot_lustre_mdd_permission(const struct lu_env *env,
444 struct md_object *pobj,
445 struct md_object *cobj,
446 struct md_attr *attr, int mask)
448 if (mask & ~(MAY_READ | MAY_EXEC))
454 static int dot_lustre_mdd_attr_get(const struct lu_env *env,
455 struct md_object *obj, struct md_attr *ma)
457 struct mdd_object *mdd_obj = md2mdd_obj(obj);
459 return mdd_attr_get_internal_locked(env, mdd_obj, ma);
462 static int dot_lustre_mdd_attr_set(const struct lu_env *env,
463 struct md_object *obj,
464 const struct md_attr *ma)
469 static int dot_lustre_mdd_xattr_get(const struct lu_env *env,
470 struct md_object *obj, struct lu_buf *buf,
476 static int dot_lustre_mdd_xattr_list(const struct lu_env *env,
477 struct md_object *obj, struct lu_buf *buf)
482 static int dot_lustre_mdd_xattr_set(const struct lu_env *env,
483 struct md_object *obj,
484 const struct lu_buf *buf, const char *name,
490 static int dot_lustre_mdd_xattr_del(const struct lu_env *env,
491 struct md_object *obj,
497 static int dot_lustre_mdd_readlink(const struct lu_env *env,
498 struct md_object *obj, struct lu_buf *buf)
503 static int dot_lustre_mdd_object_create(const struct lu_env *env,
504 struct md_object *obj,
505 const struct md_op_spec *spec,
511 static int dot_lustre_mdd_ref_add(const struct lu_env *env,
512 struct md_object *obj,
513 const struct md_attr *ma)
518 static int dot_lustre_mdd_ref_del(const struct lu_env *env,
519 struct md_object *obj,
525 static int dot_lustre_mdd_open(const struct lu_env *env, struct md_object *obj,
528 struct mdd_object *mdd_obj = md2mdd_obj(obj);
530 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
531 mdd_obj->mod_count++;
532 mdd_write_unlock(env, mdd_obj);
537 static int dot_lustre_mdd_close(const struct lu_env *env, struct md_object *obj,
538 struct md_attr *ma, int mode)
540 struct mdd_object *mdd_obj = md2mdd_obj(obj);
542 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
543 mdd_obj->mod_count--;
544 mdd_write_unlock(env, mdd_obj);
549 static int dot_lustre_mdd_object_sync(const struct lu_env *env,
550 struct md_object *obj)
555 static int dot_lustre_mdd_path(const struct lu_env *env, struct md_object *obj,
556 char *path, int pathlen, __u64 *recno, int *linkno)
561 static int dot_file_lock(const struct lu_env *env, struct md_object *obj,
562 struct lov_mds_md *lmm, struct ldlm_extent *extent,
563 struct lustre_handle *lockh)
568 static int dot_file_unlock(const struct lu_env *env, struct md_object *obj,
569 struct lov_mds_md *lmm, struct lustre_handle *lockh)
574 static struct md_object_operations mdd_dot_lustre_obj_ops = {
575 .moo_permission = dot_lustre_mdd_permission,
576 .moo_attr_get = dot_lustre_mdd_attr_get,
577 .moo_attr_set = dot_lustre_mdd_attr_set,
578 .moo_xattr_get = dot_lustre_mdd_xattr_get,
579 .moo_xattr_list = dot_lustre_mdd_xattr_list,
580 .moo_xattr_set = dot_lustre_mdd_xattr_set,
581 .moo_xattr_del = dot_lustre_mdd_xattr_del,
582 .moo_readpage = mdd_readpage,
583 .moo_readlink = dot_lustre_mdd_readlink,
584 .moo_object_create = dot_lustre_mdd_object_create,
585 .moo_ref_add = dot_lustre_mdd_ref_add,
586 .moo_ref_del = dot_lustre_mdd_ref_del,
587 .moo_open = dot_lustre_mdd_open,
588 .moo_close = dot_lustre_mdd_close,
589 .moo_capa_get = mdd_capa_get,
590 .moo_object_sync = dot_lustre_mdd_object_sync,
591 .moo_path = dot_lustre_mdd_path,
592 .moo_file_lock = dot_file_lock,
593 .moo_file_unlock = dot_file_unlock,
597 static int dot_lustre_mdd_lookup(const struct lu_env *env, struct md_object *p,
598 const struct lu_name *lname, struct lu_fid *f,
599 struct md_op_spec *spec)
601 if (strcmp(lname->ln_name, mdd_obf_dir_name) == 0)
609 static mdl_mode_t dot_lustre_mdd_lock_mode(const struct lu_env *env,
610 struct md_object *obj,
616 static int dot_lustre_mdd_create(const struct lu_env *env,
617 struct md_object *pobj,
618 const struct lu_name *lname,
619 struct md_object *child,
620 struct md_op_spec *spec,
626 static int dot_lustre_mdd_create_data(const struct lu_env *env,
629 const struct md_op_spec *spec,
635 static int dot_lustre_mdd_rename(const struct lu_env *env,
636 struct md_object *src_pobj,
637 struct md_object *tgt_pobj,
638 const struct lu_fid *lf,
639 const struct lu_name *lsname,
640 struct md_object *tobj,
641 const struct lu_name *ltname,
647 static int dot_lustre_mdd_link(const struct lu_env *env,
648 struct md_object *tgt_obj,
649 struct md_object *src_obj,
650 const struct lu_name *lname,
656 static int dot_lustre_mdd_unlink(const struct lu_env *env,
657 struct md_object *pobj,
658 struct md_object *cobj,
659 const struct lu_name *lname,
665 static int dot_lustre_mdd_name_insert(const struct lu_env *env,
666 struct md_object *obj,
667 const struct lu_name *lname,
668 const struct lu_fid *fid,
669 const struct md_attr *ma)
674 static int dot_lustre_mdd_name_remove(const struct lu_env *env,
675 struct md_object *obj,
676 const struct lu_name *lname,
677 const struct md_attr *ma)
682 static int dot_lustre_mdd_rename_tgt(const struct lu_env *env,
683 struct md_object *pobj,
684 struct md_object *tobj,
685 const struct lu_fid *fid,
686 const struct lu_name *lname,
693 static struct md_dir_operations mdd_dot_lustre_dir_ops = {
694 .mdo_is_subdir = mdd_is_subdir,
695 .mdo_lookup = dot_lustre_mdd_lookup,
696 .mdo_lock_mode = dot_lustre_mdd_lock_mode,
697 .mdo_create = dot_lustre_mdd_create,
698 .mdo_create_data = dot_lustre_mdd_create_data,
699 .mdo_rename = dot_lustre_mdd_rename,
700 .mdo_link = dot_lustre_mdd_link,
701 .mdo_unlink = dot_lustre_mdd_unlink,
702 .mdo_name_insert = dot_lustre_mdd_name_insert,
703 .mdo_name_remove = dot_lustre_mdd_name_remove,
704 .mdo_rename_tgt = dot_lustre_mdd_rename_tgt,
707 static int obf_attr_get(const struct lu_env *env, struct md_object *obj,
712 if (ma->ma_need & MA_INODE) {
713 struct mdd_device *mdd = mdo2mdd(obj);
715 /* "fid" is a virtual object and hence does not have any "real"
716 * attributes. So we reuse attributes of .lustre for "fid" dir */
717 ma->ma_need |= MA_INODE;
718 rc = dot_lustre_mdd_attr_get(env, &mdd->mdd_dot_lustre->mod_obj,
722 ma->ma_valid |= MA_INODE;
725 /* "fid" directory does not have any striping information. */
726 if (ma->ma_need & MA_LOV) {
727 struct mdd_object *mdd_obj = md2mdd_obj(obj);
729 if (ma->ma_valid & MA_LOV)
732 if (!(S_ISREG(mdd_object_type(mdd_obj)) ||
733 S_ISDIR(mdd_object_type(mdd_obj))))
736 if (ma->ma_need & MA_LOV_DEF) {
737 rc = mdd_get_default_md(mdd_obj, ma->ma_lmm);
739 ma->ma_lmm_size = rc;
740 ma->ma_valid |= MA_LOV;
749 static int obf_attr_set(const struct lu_env *env, struct md_object *obj,
750 const struct md_attr *ma)
755 static int obf_xattr_get(const struct lu_env *env,
756 struct md_object *obj, struct lu_buf *buf,
762 static int obf_mdd_open(const struct lu_env *env, struct md_object *obj,
765 struct mdd_object *mdd_obj = md2mdd_obj(obj);
767 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
768 mdd_obj->mod_count++;
769 mdd_write_unlock(env, mdd_obj);
774 static int obf_mdd_close(const struct lu_env *env, struct md_object *obj,
775 struct md_attr *ma, int mode)
777 struct mdd_object *mdd_obj = md2mdd_obj(obj);
779 mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
780 mdd_obj->mod_count--;
781 mdd_write_unlock(env, mdd_obj);
786 /** Nothing to list in "fid" directory */
787 static int obf_mdd_readpage(const struct lu_env *env, struct md_object *obj,
788 const struct lu_rdpg *rdpg)
793 static int obf_path(const struct lu_env *env, struct md_object *obj,
794 char *path, int pathlen, __u64 *recno, int *linkno)
799 static struct md_object_operations mdd_obf_obj_ops = {
800 .moo_attr_get = obf_attr_get,
801 .moo_attr_set = obf_attr_set,
802 .moo_xattr_get = obf_xattr_get,
803 .moo_open = obf_mdd_open,
804 .moo_close = obf_mdd_close,
805 .moo_readpage = obf_mdd_readpage,
810 * Lookup method for "fid" object. Only filenames with correct SEQ:OID format
811 * are valid. We also check if object with passed fid exists or not.
813 static int obf_lookup(const struct lu_env *env, struct md_object *p,
814 const struct lu_name *lname, struct lu_fid *f,
815 struct md_op_spec *spec)
817 char *name = (char *)lname->ln_name;
818 struct mdd_device *mdd = mdo2mdd(p);
819 struct mdd_object *child;
825 sscanf(name, SFID, RFID(f));
826 if (!fid_is_sane(f)) {
827 CWARN("bad FID format [%s], should be "DFID"\n", lname->ln_name,
829 GOTO(out, rc = -EINVAL);
832 /* Check if object with this fid exists */
833 child = mdd_object_find(env, mdd, f);
837 GOTO(out, rc = PTR_ERR(child));
839 if (mdd_object_exists(child) == 0)
842 mdd_object_put(env, child);
848 static int obf_create(const struct lu_env *env, struct md_object *pobj,
849 const struct lu_name *lname, struct md_object *child,
850 struct md_op_spec *spec, struct md_attr* ma)
855 static int obf_rename(const struct lu_env *env,
856 struct md_object *src_pobj, struct md_object *tgt_pobj,
857 const struct lu_fid *lf, const struct lu_name *lsname,
858 struct md_object *tobj, const struct lu_name *ltname,
864 static int obf_link(const struct lu_env *env, struct md_object *tgt_obj,
865 struct md_object *src_obj, const struct lu_name *lname,
871 static int obf_unlink(const struct lu_env *env, struct md_object *pobj,
872 struct md_object *cobj, const struct lu_name *lname,
878 static struct md_dir_operations mdd_obf_dir_ops = {
879 .mdo_lookup = obf_lookup,
880 .mdo_create = obf_create,
881 .mdo_rename = obf_rename,
882 .mdo_link = obf_link,
883 .mdo_unlink = obf_unlink
887 * Create special in-memory "fid" object for open-by-fid.
889 static int mdd_obf_setup(const struct lu_env *env, struct mdd_device *m)
891 struct mdd_object *mdd_obf;
892 struct lu_object *obf_lu_obj;
895 m->mdd_dot_lustre_objs.mdd_obf = mdd_object_find(env, m,
897 if (m->mdd_dot_lustre_objs.mdd_obf == NULL ||
898 IS_ERR(m->mdd_dot_lustre_objs.mdd_obf))
899 GOTO(out, rc = -ENOENT);
901 mdd_obf = m->mdd_dot_lustre_objs.mdd_obf;
902 mdd_obf->mod_obj.mo_dir_ops = &mdd_obf_dir_ops;
903 mdd_obf->mod_obj.mo_ops = &mdd_obf_obj_ops;
904 /* Don't allow objects to be created in "fid" dir */
905 mdd_obf->mod_flags |= IMMUTE_OBJ;
907 obf_lu_obj = mdd2lu_obj(mdd_obf);
908 obf_lu_obj->lo_header->loh_attr |= (LOHA_EXISTS | S_IFDIR);
914 /** Setup ".lustre" directory object */
915 static int mdd_dot_lustre_setup(const struct lu_env *env, struct mdd_device *m)
917 struct dt_object *dt_dot_lustre;
918 struct lu_fid *fid = &mdd_env_info(env)->mti_fid;
921 rc = create_dot_lustre_dir(env, m);
925 dt_dot_lustre = dt_store_open(env, m->mdd_child, mdd_root_dir_name,
926 dot_lustre_name, fid);
927 if (IS_ERR(dt_dot_lustre)) {
928 rc = PTR_ERR(dt_dot_lustre);
932 /* references are released in mdd_device_shutdown() */
933 m->mdd_dot_lustre = lu2mdd_obj(lu_object_locate(dt_dot_lustre->do_lu.lo_header,
936 m->mdd_dot_lustre->mod_obj.mo_dir_ops = &mdd_dot_lustre_dir_ops;
937 m->mdd_dot_lustre->mod_obj.mo_ops = &mdd_dot_lustre_obj_ops;
939 rc = mdd_obf_setup(env, m);
941 CERROR("Error initializing \"fid\" object - %d.\n", rc);
947 static int mdd_process_config(const struct lu_env *env,
948 struct lu_device *d, struct lustre_cfg *cfg)
950 struct mdd_device *m = lu2mdd_dev(d);
951 struct dt_device *dt = m->mdd_child;
952 struct lu_device *next = &dt->dd_lu_dev;
956 switch (cfg->lcfg_command) {
958 struct lprocfs_static_vars lvars;
960 lprocfs_mdd_init_vars(&lvars);
961 rc = class_process_proc_param(PARAM_MDD, lvars.obd_vars, cfg,m);
962 if (rc > 0 || rc == -ENOSYS)
963 /* we don't understand; pass it on */
964 rc = next->ld_ops->ldo_process_config(env, next, cfg);
968 rc = next->ld_ops->ldo_process_config(env, next, cfg);
971 dt->dd_ops->dt_conf_get(env, dt, &m->mdd_dt_conf);
973 rc = mdd_init_obd(env, m, cfg);
975 CERROR("lov init error %d\n", rc);
979 mdd_changelog_init(env, m);
982 mdd_device_shutdown(env, m, cfg);
984 rc = next->ld_ops->ldo_process_config(env, next, cfg);
992 static int mdd_lov_set_nextid(const struct lu_env *env,
993 struct mdd_device *mdd)
995 struct mds_obd *mds = &mdd->mdd_obd_dev->u.mds;
999 LASSERT(mds->mds_lov_objids != NULL);
1000 rc = obd_set_info_async(mds->mds_lov_exp, strlen(KEY_NEXT_ID),
1001 KEY_NEXT_ID, mds->mds_lov_desc.ld_tgt_count,
1002 mds->mds_lov_objids, NULL);
1007 static int mdd_cleanup_unlink_llog(const struct lu_env *env,
1008 struct mdd_device *mdd)
1010 /* XXX: to be implemented! */
1015 static int mdd_recovery_complete(const struct lu_env *env,
1016 struct lu_device *d)
1018 struct mdd_device *mdd = lu2mdd_dev(d);
1019 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
1020 struct obd_device *obd = mdd2obd_dev(mdd);
1024 LASSERT(mdd != NULL);
1025 LASSERT(obd != NULL);
1027 /* XXX: Do we need this in new stack? */
1028 rc = mdd_lov_set_nextid(env, mdd);
1030 CERROR("mdd_lov_set_nextid() failed %d\n",
1035 /* XXX: cleanup unlink. */
1036 rc = mdd_cleanup_unlink_llog(env, mdd);
1038 CERROR("mdd_cleanup_unlink_llog() failed %d\n",
1043 /* Call that with obd_recovering = 1 just to update objids */
1044 obd_notify(obd->u.mds.mds_lov_obd, NULL, (obd->obd_async_recov ?
1045 OBD_NOTIFY_SYNC_NONBLOCK : OBD_NOTIFY_SYNC), NULL);
1047 /* Drop obd_recovering to 0 and call o_postrecov to recover mds_lov */
1048 cfs_spin_lock(&obd->obd_dev_lock);
1049 obd->obd_recovering = 0;
1050 cfs_spin_unlock(&obd->obd_dev_lock);
1051 obd->obd_type->typ_dt_ops->o_postrecov(obd);
1053 /* XXX: orphans handling. */
1054 __mdd_orphan_cleanup(env, mdd);
1055 rc = next->ld_ops->ldo_recovery_complete(env, next);
1060 static int mdd_prepare(const struct lu_env *env,
1061 struct lu_device *pdev,
1062 struct lu_device *cdev)
1064 struct mdd_device *mdd = lu2mdd_dev(cdev);
1065 struct lu_device *next = &mdd->mdd_child->dd_lu_dev;
1066 struct dt_object *root;
1071 rc = next->ld_ops->ldo_prepare(env, cdev, next);
1075 dt_txn_callback_add(mdd->mdd_child, &mdd->mdd_txn_cb);
1076 root = dt_store_open(env, mdd->mdd_child, "", mdd_root_dir_name,
1077 &mdd->mdd_root_fid);
1078 if (!IS_ERR(root)) {
1079 LASSERT(root != NULL);
1080 lu_object_put(env, &root->do_lu);
1081 rc = orph_index_init(env, mdd);
1088 rc = mdd_dot_lustre_setup(env, mdd);
1090 CERROR("Error(%d) initializing .lustre objects\n", rc);
1094 /* we use capa file to declare llog changes,
1095 * will be fixed with new llog in 2.3 */
1096 root = dt_store_open(env, mdd->mdd_child, "", CAPA_KEYS, &fid);
1098 mdd->mdd_capa = root;
1106 const struct lu_device_operations mdd_lu_ops = {
1107 .ldo_object_alloc = mdd_object_alloc,
1108 .ldo_process_config = mdd_process_config,
1109 .ldo_recovery_complete = mdd_recovery_complete,
1110 .ldo_prepare = mdd_prepare,
1114 * No permission check is needed.
1116 static int mdd_root_get(const struct lu_env *env,
1117 struct md_device *m, struct lu_fid *f)
1119 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1122 *f = mdd->mdd_root_fid;
1127 * No permission check is needed.
1129 static int mdd_statfs(const struct lu_env *env, struct md_device *m,
1130 struct obd_statfs *sfs)
1132 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1137 rc = mdd_child_ops(mdd)->dt_statfs(env, mdd->mdd_child, sfs);
1143 * No permission check is needed.
1145 static int mdd_maxsize_get(const struct lu_env *env, struct md_device *m,
1146 int *md_size, int *cookie_size)
1148 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1151 *md_size = mdd_lov_mdsize(env, mdd);
1152 *cookie_size = mdd_lov_cookiesize(env, mdd);
1157 static int mdd_init_capa_ctxt(const struct lu_env *env, struct md_device *m,
1158 int mode, unsigned long timeout, __u32 alg,
1159 struct lustre_capa_key *keys)
1161 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1162 struct mds_obd *mds = &mdd2obd_dev(mdd)->u.mds;
1166 /* need barrier for mds_capa_keys access. */
1167 cfs_down_write(&mds->mds_notify_lock);
1168 mds->mds_capa_keys = keys;
1169 cfs_up_write(&mds->mds_notify_lock);
1171 rc = mdd_child_ops(mdd)->dt_init_capa_ctxt(env, mdd->mdd_child, mode,
1172 timeout, alg, keys);
1176 static int mdd_update_capa_key(const struct lu_env *env,
1177 struct md_device *m,
1178 struct lustre_capa_key *key)
1180 struct mds_capa_info info = { .uuid = NULL, .capa = key };
1181 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1182 struct obd_export *lov_exp = mdd2obd_dev(mdd)->u.mds.mds_lov_exp;
1186 rc = obd_set_info_async(env, lov_exp, sizeof(KEY_CAPA_KEY),
1187 KEY_CAPA_KEY, sizeof(info), &info, NULL);
1191 static int mdd_llog_ctxt_get(const struct lu_env *env, struct md_device *m,
1194 struct mdd_device *mdd = lu2mdd_dev(&m->md_lu_dev);
1196 *h = llog_group_get_ctxt(&mdd2obd_dev(mdd)->obd_olg, idx);
1197 return (*h == NULL ? -ENOENT : 0);
1200 static struct lu_device *mdd_device_alloc(const struct lu_env *env,
1201 struct lu_device_type *t,
1202 struct lustre_cfg *lcfg)
1204 struct lu_device *l;
1205 struct mdd_device *m;
1209 l = ERR_PTR(-ENOMEM);
1211 md_device_init(&m->mdd_md_dev, t);
1213 l->ld_ops = &mdd_lu_ops;
1214 m->mdd_md_dev.md_ops = &mdd_ops;
1215 md_upcall_init(&m->mdd_md_dev, NULL);
1221 static struct lu_device *mdd_device_free(const struct lu_env *env,
1222 struct lu_device *lu)
1224 struct mdd_device *m = lu2mdd_dev(lu);
1225 struct lu_device *next = &m->mdd_child->dd_lu_dev;
1228 LASSERT(cfs_atomic_read(&lu->ld_ref) == 0);
1229 md_device_fini(&m->mdd_md_dev);
1234 static struct obd_ops mdd_obd_device_ops = {
1235 .o_owner = THIS_MODULE
1238 /* context key constructor/destructor: mdd_ucred_key_init, mdd_ucred_key_fini */
1239 LU_KEY_INIT_FINI(mdd_ucred, struct md_ucred);
1241 static struct lu_context_key mdd_ucred_key = {
1242 .lct_tags = LCT_SESSION,
1243 .lct_init = mdd_ucred_key_init,
1244 .lct_fini = mdd_ucred_key_fini
1247 struct md_ucred *md_ucred(const struct lu_env *env)
1249 LASSERT(env->le_ses != NULL);
1250 return lu_context_key_get(env->le_ses, &mdd_ucred_key);
1252 EXPORT_SYMBOL(md_ucred);
1255 * context key constructor/destructor:
1256 * mdd_capainfo_key_init, mdd_capainfo_key_fini
1258 LU_KEY_INIT_FINI(mdd_capainfo, struct md_capainfo);
1260 struct lu_context_key mdd_capainfo_key = {
1261 .lct_tags = LCT_SESSION,
1262 .lct_init = mdd_capainfo_key_init,
1263 .lct_fini = mdd_capainfo_key_fini
1266 struct md_capainfo *md_capainfo(const struct lu_env *env)
1268 /* NB, in mdt_init0 */
1269 if (env->le_ses == NULL)
1271 return lu_context_key_get(env->le_ses, &mdd_capainfo_key);
1273 EXPORT_SYMBOL(md_capainfo);
1276 * context key constructor/destructor:
1277 * mdd_quota_key_init, mdd_quota_key_fini
1279 LU_KEY_INIT_FINI(mdd_quota, struct md_quota);
1281 struct lu_context_key mdd_quota_key = {
1282 .lct_tags = LCT_SESSION,
1283 .lct_init = mdd_quota_key_init,
1284 .lct_fini = mdd_quota_key_fini
1287 struct md_quota *md_quota(const struct lu_env *env)
1289 LASSERT(env->le_ses != NULL);
1290 return lu_context_key_get(env->le_ses, &mdd_quota_key);
1292 EXPORT_SYMBOL(md_quota);
1294 static int mdd_changelog_user_register(struct mdd_device *mdd, int *id)
1296 struct llog_ctxt *ctxt;
1297 struct llog_changelog_user_rec *rec;
1301 ctxt = llog_get_context(mdd2obd_dev(mdd),LLOG_CHANGELOG_USER_ORIG_CTXT);
1307 llog_ctxt_put(ctxt);
1311 /* Assume we want it on since somebody registered */
1312 rc = mdd_changelog_on(mdd, 1);
1316 rec->cur_hdr.lrh_len = sizeof(*rec);
1317 rec->cur_hdr.lrh_type = CHANGELOG_USER_REC;
1318 cfs_spin_lock(&mdd->mdd_cl.mc_user_lock);
1319 if (mdd->mdd_cl.mc_lastuser == (unsigned int)(-1)) {
1320 cfs_spin_unlock(&mdd->mdd_cl.mc_user_lock);
1321 CERROR("Maximum number of changelog users exceeded!\n");
1322 GOTO(out, rc = -EOVERFLOW);
1324 *id = rec->cur_id = ++mdd->mdd_cl.mc_lastuser;
1325 rec->cur_endrec = mdd->mdd_cl.mc_index;
1326 cfs_spin_unlock(&mdd->mdd_cl.mc_user_lock);
1328 rc = llog_add(ctxt, &rec->cur_hdr, NULL, NULL, 0);
1330 CDEBUG(D_IOCTL, "Registered changelog user %d\n", *id);
1333 llog_ctxt_put(ctxt);
1337 int mdd_declare_llog_cancel(const struct lu_env *env, struct mdd_device *mdd,
1338 struct thandle *handle)
1343 /* XXX: this is a temporary solution to declare llog changes
1344 * will be fixed in 2.3 with new llog implementation */
1346 LASSERT(mdd->mdd_capa);
1348 /* the llog record could be canceled either by modifying
1349 * the plain llog's header or by destroying the llog itself
1350 * when this record is the last one in it, it can't be known
1351 * here, but the catlog's header will also be modified for
1352 * the second case, then the first case can be covered and
1353 * is no need to declare it */
1355 /* destroy empty plain log */
1356 rc = dt_declare_destroy(env, mdd->mdd_capa, handle);
1360 /* record the catlog's header if an empty plain log was destroyed */
1361 rc = dt_declare_record_write(env, mdd->mdd_capa,
1362 sizeof(struct llog_logid_rec), 0, handle);
1366 struct mdd_changelog_user_data {
1367 __u64 mcud_endrec; /**< purge record for this user */
1368 __u64 mcud_minrec; /**< lowest changelog recno still referenced */
1370 __u32 mcud_minid; /**< user id with lowest rec reference */
1371 __u32 mcud_usercount;
1373 struct mdd_device *mcud_mdd;
1374 const struct lu_env *mcud_env;
1376 #define MCUD_UNREGISTER -1LL
1379 * 1. Find the smallest record everyone is willing to purge
1380 * 2. Update the last purgeable record for this user
1382 static int mdd_changelog_user_purge_cb(struct llog_handle *llh,
1383 struct llog_rec_hdr *hdr, void *data)
1385 struct llog_changelog_user_rec *rec;
1386 struct mdd_changelog_user_data *mcud =
1387 (struct mdd_changelog_user_data *)data;
1391 LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
1393 rec = (struct llog_changelog_user_rec *)hdr;
1395 mcud->mcud_usercount++;
1397 /* If we have a new endrec for this id, use it for the following
1398 min check instead of its old value */
1399 if (rec->cur_id == mcud->mcud_id)
1400 rec->cur_endrec = max(rec->cur_endrec, mcud->mcud_endrec);
1402 /* Track the minimum referenced record */
1403 if (mcud->mcud_minid == 0 || mcud->mcud_minrec > rec->cur_endrec) {
1404 mcud->mcud_minid = rec->cur_id;
1405 mcud->mcud_minrec = rec->cur_endrec;
1408 if (rec->cur_id != mcud->mcud_id)
1411 /* Update this user's record */
1412 mcud->mcud_found = 1;
1414 /* Special case: unregister this user */
1415 if (mcud->mcud_endrec == MCUD_UNREGISTER) {
1416 struct llog_cookie cookie;
1418 struct mdd_device *mdd = mcud->mcud_mdd;
1420 cookie.lgc_lgl = llh->lgh_id;
1421 cookie.lgc_index = hdr->lrh_index;
1423 /* XXX This is a workaround for the deadlock of changelog
1424 * adding vs. changelog cancelling. LU-81. */
1425 th = mdd_trans_create(mcud->mcud_env, mdd);
1427 CERROR("Cannot get thandle\n");
1431 rc = mdd_declare_llog_cancel(mcud->mcud_env, mdd, th);
1435 rc = mdd_trans_start(mcud->mcud_env, mdd, th);
1439 rc = llog_cat_cancel_records(llh->u.phd.phd_cat_handle,
1442 mcud->mcud_usercount--;
1445 mdd_trans_stop(mcud->mcud_env, mdd, 0, th);
1449 /* Update the endrec */
1450 CDEBUG(D_IOCTL, "Rewriting changelog user %d endrec to "LPU64"\n",
1451 mcud->mcud_id, rec->cur_endrec);
1453 /* hdr+1 is loc of data */
1454 hdr->lrh_len -= sizeof(*hdr) + sizeof(struct llog_rec_tail);
1455 rc = llog_write_rec(llh, hdr, NULL, 0, (void *)(hdr + 1),
1461 static int mdd_changelog_user_purge(const struct lu_env *env,
1462 struct mdd_device *mdd, int id,
1465 struct mdd_changelog_user_data data;
1466 struct llog_ctxt *ctxt;
1470 CDEBUG(D_IOCTL, "Purge request: id=%d, endrec=%lld\n", id, endrec);
1473 data.mcud_minid = 0;
1474 data.mcud_minrec = 0;
1475 data.mcud_usercount = 0;
1476 data.mcud_endrec = endrec;
1477 data.mcud_mdd = mdd;
1478 data.mcud_env = env;
1479 cfs_spin_lock(&mdd->mdd_cl.mc_lock);
1480 endrec = mdd->mdd_cl.mc_index;
1481 cfs_spin_unlock(&mdd->mdd_cl.mc_lock);
1482 if ((data.mcud_endrec == 0) ||
1483 ((data.mcud_endrec > endrec) &&
1484 (data.mcud_endrec != MCUD_UNREGISTER)))
1485 data.mcud_endrec = endrec;
1487 ctxt = llog_get_context(mdd2obd_dev(mdd),LLOG_CHANGELOG_USER_ORIG_CTXT);
1490 LASSERT(ctxt->loc_handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
1492 rc = llog_cat_process(ctxt->loc_handle, mdd_changelog_user_purge_cb,
1493 (void *)&data, 0, 0);
1494 if ((rc >= 0) && (data.mcud_minrec > 0)) {
1495 CDEBUG(D_IOCTL, "Purging changelog entries up to "LPD64
1496 ", referenced by "CHANGELOG_USER_PREFIX"%d\n",
1497 data.mcud_minrec, data.mcud_minid);
1498 rc = mdd_changelog_llog_cancel(mdd, data.mcud_minrec);
1500 CWARN("Could not determine changelog records to purge; rc=%d\n",
1504 llog_ctxt_put(ctxt);
1506 if (!data.mcud_found) {
1507 CWARN("No entry for user %d. Last changelog reference is "
1508 LPD64" by changelog user %d\n", data.mcud_id,
1509 data.mcud_minrec, data.mcud_minid);
1513 if (!rc && data.mcud_usercount == 0)
1514 /* No more users; turn changelogs off */
1515 rc = mdd_changelog_on(mdd, 0);
1521 * May be called remotely from mdt_iocontrol_handle or locally from
1522 * mdt_iocontrol. Data may be freeform - remote handling doesn't enforce
1523 * an obd_ioctl_data format (but local ioctl handler does).
1525 * \param len - data len
1526 * \param karg - ioctl data, in kernel space
1528 static int mdd_iocontrol(const struct lu_env *env, struct md_device *m,
1529 unsigned int cmd, int len, void *karg)
1531 struct mdd_device *mdd;
1532 struct obd_ioctl_data *data = karg;
1536 mdd = lu2mdd_dev(&m->md_lu_dev);
1538 /* Doesn't use obd_ioctl_data */
1540 case OBD_IOC_CHANGELOG_CLEAR: {
1541 struct changelog_setinfo *cs = karg;
1542 rc = mdd_changelog_user_purge(env, mdd, cs->cs_id,
1546 case OBD_IOC_GET_MNTOPT: {
1547 mntopt_t *mntopts = (mntopt_t *)karg;
1548 *mntopts = mdd->mdd_dt_conf.ddp_mntopts;
1553 /* Below ioctls use obd_ioctl_data */
1554 if (len != sizeof(*data)) {
1555 CERROR("Bad ioctl size %d\n", len);
1558 if (data->ioc_version != OBD_IOCTL_VERSION) {
1559 CERROR("Bad magic %x != %x\n", data->ioc_version,
1565 case OBD_IOC_CHANGELOG_REG:
1566 rc = mdd_changelog_user_register(mdd, &data->ioc_u32_1);
1568 case OBD_IOC_CHANGELOG_DEREG:
1569 rc = mdd_changelog_user_purge(env, mdd, data->ioc_u32_1,
1579 /* type constructor/destructor: mdd_type_init, mdd_type_fini */
1580 LU_TYPE_INIT_FINI(mdd, &mdd_thread_key, &mdd_ucred_key, &mdd_capainfo_key,
1583 const struct md_device_operations mdd_ops = {
1584 .mdo_statfs = mdd_statfs,
1585 .mdo_root_get = mdd_root_get,
1586 .mdo_maxsize_get = mdd_maxsize_get,
1587 .mdo_init_capa_ctxt = mdd_init_capa_ctxt,
1588 .mdo_update_capa_key= mdd_update_capa_key,
1589 .mdo_llog_ctxt_get = mdd_llog_ctxt_get,
1590 .mdo_iocontrol = mdd_iocontrol,
1591 #ifdef HAVE_QUOTA_SUPPORT
1593 .mqo_notify = mdd_quota_notify,
1594 .mqo_setup = mdd_quota_setup,
1595 .mqo_cleanup = mdd_quota_cleanup,
1596 .mqo_recovery = mdd_quota_recovery,
1597 .mqo_check = mdd_quota_check,
1598 .mqo_on = mdd_quota_on,
1599 .mqo_off = mdd_quota_off,
1600 .mqo_setinfo = mdd_quota_setinfo,
1601 .mqo_getinfo = mdd_quota_getinfo,
1602 .mqo_setquota = mdd_quota_setquota,
1603 .mqo_getquota = mdd_quota_getquota,
1604 .mqo_getoinfo = mdd_quota_getoinfo,
1605 .mqo_getoquota = mdd_quota_getoquota,
1606 .mqo_invalidate = mdd_quota_invalidate,
1607 .mqo_finvalidate = mdd_quota_finvalidate
1612 static struct lu_device_type_operations mdd_device_type_ops = {
1613 .ldto_init = mdd_type_init,
1614 .ldto_fini = mdd_type_fini,
1616 .ldto_start = mdd_type_start,
1617 .ldto_stop = mdd_type_stop,
1619 .ldto_device_alloc = mdd_device_alloc,
1620 .ldto_device_free = mdd_device_free,
1622 .ldto_device_init = mdd_device_init,
1623 .ldto_device_fini = mdd_device_fini
1626 static struct lu_device_type mdd_device_type = {
1627 .ldt_tags = LU_DEVICE_MD,
1628 .ldt_name = LUSTRE_MDD_NAME,
1629 .ldt_ops = &mdd_device_type_ops,
1630 .ldt_ctx_tags = LCT_MD_THREAD
1633 /* context key constructor: mdd_key_init */
1634 LU_KEY_INIT(mdd, struct mdd_thread_info);
1636 static void mdd_key_fini(const struct lu_context *ctx,
1637 struct lu_context_key *key, void *data)
1639 struct mdd_thread_info *info = data;
1640 if (info->mti_max_lmm != NULL)
1641 OBD_FREE(info->mti_max_lmm, info->mti_max_lmm_size);
1642 if (info->mti_max_cookie != NULL)
1643 OBD_FREE(info->mti_max_cookie, info->mti_max_cookie_size);
1644 mdd_buf_put(&info->mti_big_buf);
1649 /* context key: mdd_thread_key */
1650 LU_CONTEXT_KEY_DEFINE(mdd, LCT_MD_THREAD);
1652 static struct lu_local_obj_desc llod_capa_key = {
1653 .llod_name = CAPA_KEYS,
1654 .llod_oid = MDD_CAPA_KEYS_OID,
1658 static struct lu_local_obj_desc llod_mdd_orphan = {
1659 .llod_name = orph_index_name,
1660 .llod_oid = MDD_ORPHAN_OID,
1662 .llod_feat = &dt_directory_features,
1665 static struct lu_local_obj_desc llod_mdd_root = {
1666 .llod_name = mdd_root_dir_name,
1667 .llod_oid = MDD_ROOT_INDEX_OID,
1669 .llod_feat = &dt_directory_features,
1672 static int __init mdd_mod_init(void)
1674 struct lprocfs_static_vars lvars;
1675 lprocfs_mdd_init_vars(&lvars);
1677 llo_local_obj_register(&llod_capa_key);
1678 llo_local_obj_register(&llod_mdd_orphan);
1679 llo_local_obj_register(&llod_mdd_root);
1681 return class_register_type(&mdd_obd_device_ops, NULL, lvars.module_vars,
1682 LUSTRE_MDD_NAME, &mdd_device_type);
1685 static void __exit mdd_mod_exit(void)
1687 llo_local_obj_unregister(&llod_capa_key);
1688 llo_local_obj_unregister(&llod_mdd_orphan);
1689 llo_local_obj_unregister(&llod_mdd_root);
1691 class_unregister_type(LUSTRE_MDD_NAME);
1694 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
1695 MODULE_DESCRIPTION("Lustre Meta-data Device Prototype ("LUSTRE_MDD_NAME")");
1696 MODULE_LICENSE("GPL");
1698 cfs_module(mdd, "0.1.0", mdd_mod_init, mdd_mod_exit);