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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #define DEBUG_SUBSYSTEM S_LMV
34 #include <linux/slab.h>
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/user_namespace.h>
38 #ifdef HAVE_UIDGID_HEADER
39 # include <linux/uidgid.h>
41 #include <linux/slab.h>
42 #include <linux/pagemap.h>
44 #include <linux/math64.h>
45 #include <linux/seq_file.h>
46 #include <linux/namei.h>
48 #include <obd_support.h>
49 #include <lustre_lib.h>
50 #include <lustre_net.h>
51 #include <obd_class.h>
52 #include <lustre_lmv.h>
53 #include <lprocfs_status.h>
54 #include <cl_object.h>
55 #include <lustre_fid.h>
56 #include <uapi/linux/lustre/lustre_ioctl.h>
57 #include <lustre_kernelcomm.h>
58 #include "lmv_internal.h"
60 static int lmv_check_connect(struct obd_device *obd);
62 static void lmv_activate_target(struct lmv_obd *lmv,
63 struct lmv_tgt_desc *tgt,
66 if (tgt->ltd_active == activate)
69 tgt->ltd_active = activate;
70 lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
72 tgt->ltd_exp->exp_obd->obd_inactive = !activate;
78 * -EINVAL : UUID can't be found in the LMV's target list
79 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
80 * -EBADF : The UUID is found, but the OBD of the wrong type (!)
82 static int lmv_set_mdc_active(struct lmv_obd *lmv,
83 const struct obd_uuid *uuid,
86 struct lmv_tgt_desc *tgt = NULL;
87 struct obd_device *obd;
92 CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
93 lmv, uuid->uuid, activate);
95 spin_lock(&lmv->lmv_lock);
96 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
98 if (tgt == NULL || tgt->ltd_exp == NULL)
101 CDEBUG(D_INFO, "Target idx %d is %s conn %#llx\n", i,
102 tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
104 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
108 if (i == lmv->desc.ld_tgt_count)
109 GOTO(out_lmv_lock, rc = -EINVAL);
111 obd = class_exp2obd(tgt->ltd_exp);
113 GOTO(out_lmv_lock, rc = -ENOTCONN);
115 CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
116 obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
117 obd->obd_type->typ_name, i);
118 LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
120 if (tgt->ltd_active == activate) {
121 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
122 activate ? "" : "in");
123 GOTO(out_lmv_lock, rc);
126 CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
127 activate ? "" : "in");
128 lmv_activate_target(lmv, tgt, activate);
132 spin_unlock(&lmv->lmv_lock);
136 struct obd_uuid *lmv_get_uuid(struct obd_export *exp)
138 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
139 struct lmv_tgt_desc *tgt = lmv->tgts[0];
141 return (tgt == NULL) ? NULL : obd_get_uuid(tgt->ltd_exp);
144 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
145 enum obd_notify_event ev)
147 struct obd_connect_data *conn_data;
148 struct lmv_obd *lmv = &obd->u.lmv;
149 struct obd_uuid *uuid;
153 if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
154 CERROR("unexpected notification of %s %s!\n",
155 watched->obd_type->typ_name,
160 uuid = &watched->u.cli.cl_target_uuid;
161 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
163 * Set MDC as active before notifying the observer, so the
164 * observer can use the MDC normally.
166 rc = lmv_set_mdc_active(lmv, uuid,
167 ev == OBD_NOTIFY_ACTIVE);
169 CERROR("%sactivation of %s failed: %d\n",
170 ev == OBD_NOTIFY_ACTIVE ? "" : "de",
174 } else if (ev == OBD_NOTIFY_OCD) {
175 conn_data = &watched->u.cli.cl_import->imp_connect_data;
177 * XXX: Make sure that ocd_connect_flags from all targets are
178 * the same. Otherwise one of MDTs runs wrong version or
179 * something like this. --umka
181 obd->obd_self_export->exp_connect_data = *conn_data;
185 * Pass the notification up the chain.
187 if (obd->obd_observer)
188 rc = obd_notify(obd->obd_observer, watched, ev);
193 static int lmv_connect(const struct lu_env *env,
194 struct obd_export **pexp, struct obd_device *obd,
195 struct obd_uuid *cluuid, struct obd_connect_data *data,
198 struct lmv_obd *lmv = &obd->u.lmv;
199 struct lustre_handle conn = { 0 };
200 struct obd_export *exp;
204 rc = class_connect(&conn, obd, cluuid);
206 CERROR("class_connection() returned %d\n", rc);
210 exp = class_conn2export(&conn);
213 lmv->cluuid = *cluuid;
214 lmv->conn_data = *data;
216 if (lmv->targets_proc_entry == NULL) {
217 lmv->targets_proc_entry = lprocfs_register("target_obds",
220 if (IS_ERR(lmv->targets_proc_entry)) {
221 CERROR("%s: cannot register "
222 "/proc/fs/lustre/%s/%s/target_obds\n",
223 obd->obd_name, obd->obd_type->typ_name,
225 lmv->targets_proc_entry = NULL;
229 rc = lmv_check_connect(obd);
238 if (lmv->targets_proc_entry != NULL)
239 lprocfs_remove(&lmv->targets_proc_entry);
241 class_disconnect(exp);
246 static int lmv_init_ea_size(struct obd_export *exp, __u32 easize,
249 struct obd_device *obd = exp->exp_obd;
250 struct lmv_obd *lmv = &obd->u.lmv;
256 if (lmv->max_easize < easize) {
257 lmv->max_easize = easize;
260 if (lmv->max_def_easize < def_easize) {
261 lmv->max_def_easize = def_easize;
268 if (lmv->connected == 0)
271 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
272 struct lmv_tgt_desc *tgt = lmv->tgts[i];
274 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active) {
275 CWARN("%s: NULL export for %d\n", obd->obd_name, i);
279 rc = md_init_ea_size(tgt->ltd_exp, easize, def_easize);
281 CERROR("%s: obd_init_ea_size() failed on MDT target %d:"
282 " rc = %d\n", obd->obd_name, i, rc);
289 #define MAX_STRING_SIZE 128
291 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
293 struct lmv_obd *lmv = &obd->u.lmv;
294 struct obd_uuid *cluuid = &lmv->cluuid;
295 struct obd_uuid lmv_mdc_uuid = { "LMV_MDC_UUID" };
296 struct obd_device *mdc_obd;
297 struct obd_export *mdc_exp;
298 struct lu_fld_target target;
302 mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
305 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
309 CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
310 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
311 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
314 if (!mdc_obd->obd_set_up) {
315 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
319 rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
320 &lmv->conn_data, NULL);
322 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
327 * Init fid sequence client for this mdc and add new fld target.
329 rc = obd_fid_init(mdc_obd, mdc_exp, LUSTRE_SEQ_METADATA);
333 target.ft_srv = NULL;
334 target.ft_exp = mdc_exp;
335 target.ft_idx = tgt->ltd_idx;
337 fld_client_add_target(&lmv->lmv_fld, &target);
339 rc = obd_register_observer(mdc_obd, obd);
341 obd_disconnect(mdc_exp);
342 CERROR("target %s register_observer error %d\n",
343 tgt->ltd_uuid.uuid, rc);
347 if (obd->obd_observer) {
349 * Tell the observer about the new target.
351 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
354 obd_disconnect(mdc_exp);
360 tgt->ltd_exp = mdc_exp;
361 lmv->desc.ld_active_tgt_count++;
363 md_init_ea_size(tgt->ltd_exp, lmv->max_easize, lmv->max_def_easize);
365 CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
366 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
367 atomic_read(&obd->obd_refcount));
369 if (lmv->targets_proc_entry != NULL) {
370 struct proc_dir_entry *mdc_symlink;
372 LASSERT(mdc_obd->obd_type != NULL);
373 LASSERT(mdc_obd->obd_type->typ_name != NULL);
374 mdc_symlink = lprocfs_add_symlink(mdc_obd->obd_name,
375 lmv->targets_proc_entry,
377 mdc_obd->obd_type->typ_name,
379 if (mdc_symlink == NULL) {
380 CERROR("cannot register LMV target "
381 "/proc/fs/lustre/%s/%s/target_obds/%s\n",
382 obd->obd_type->typ_name, obd->obd_name,
389 static void lmv_del_target(struct lmv_obd *lmv, int index)
391 if (lmv->tgts[index] == NULL)
394 OBD_FREE_PTR(lmv->tgts[index]);
395 lmv->tgts[index] = NULL;
399 static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
400 __u32 index, int gen)
402 struct obd_device *mdc_obd;
403 struct lmv_obd *lmv = &obd->u.lmv;
404 struct lmv_tgt_desc *tgt;
405 int orig_tgt_count = 0;
409 CDEBUG(D_CONFIG, "Target uuid: %s. index %d\n", uuidp->uuid, index);
410 mdc_obd = class_find_client_obd(uuidp, LUSTRE_MDC_NAME,
413 CERROR("%s: Target %s not attached: rc = %d\n",
414 obd->obd_name, uuidp->uuid, -EINVAL);
418 mutex_lock(&lmv->lmv_init_mutex);
419 if ((index < lmv->tgts_size) && (lmv->tgts[index] != NULL)) {
420 tgt = lmv->tgts[index];
421 CERROR("%s: UUID %s already assigned at LOV target index %d:"
422 " rc = %d\n", obd->obd_name,
423 obd_uuid2str(&tgt->ltd_uuid), index, -EEXIST);
424 mutex_unlock(&lmv->lmv_init_mutex);
428 if (index >= lmv->tgts_size) {
429 /* We need to reallocate the lmv target array. */
430 struct lmv_tgt_desc **newtgts, **old = NULL;
434 while (newsize < index + 1)
435 newsize = newsize << 1;
436 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
437 if (newtgts == NULL) {
438 mutex_unlock(&lmv->lmv_init_mutex);
442 if (lmv->tgts_size) {
443 memcpy(newtgts, lmv->tgts,
444 sizeof(*newtgts) * lmv->tgts_size);
446 oldsize = lmv->tgts_size;
450 lmv->tgts_size = newsize;
453 OBD_FREE(old, sizeof(*old) * oldsize);
455 CDEBUG(D_CONFIG, "tgts: %p size: %d\n", lmv->tgts,
461 mutex_unlock(&lmv->lmv_init_mutex);
465 mutex_init(&tgt->ltd_fid_mutex);
466 tgt->ltd_idx = index;
467 tgt->ltd_uuid = *uuidp;
469 lmv->tgts[index] = tgt;
470 if (index >= lmv->desc.ld_tgt_count) {
471 orig_tgt_count = lmv->desc.ld_tgt_count;
472 lmv->desc.ld_tgt_count = index + 1;
475 if (lmv->connected == 0) {
476 /* lmv_check_connect() will connect this target. */
477 mutex_unlock(&lmv->lmv_init_mutex);
481 /* Otherwise let's connect it ourselves */
482 mutex_unlock(&lmv->lmv_init_mutex);
483 rc = lmv_connect_mdc(obd, tgt);
485 spin_lock(&lmv->lmv_lock);
486 if (lmv->desc.ld_tgt_count == index + 1)
487 lmv->desc.ld_tgt_count = orig_tgt_count;
488 memset(tgt, 0, sizeof(*tgt));
489 spin_unlock(&lmv->lmv_lock);
491 int easize = sizeof(struct lmv_stripe_md) +
492 lmv->desc.ld_tgt_count * sizeof(struct lu_fid);
493 lmv_init_ea_size(obd->obd_self_export, easize, 0);
499 static int lmv_check_connect(struct obd_device *obd)
501 struct lmv_obd *lmv = &obd->u.lmv;
502 struct lmv_tgt_desc *tgt;
511 mutex_lock(&lmv->lmv_init_mutex);
512 if (lmv->connected) {
513 mutex_unlock(&lmv->lmv_init_mutex);
517 if (lmv->desc.ld_tgt_count == 0) {
518 mutex_unlock(&lmv->lmv_init_mutex);
519 CERROR("%s: no targets configured.\n", obd->obd_name);
523 LASSERT(lmv->tgts != NULL);
525 if (lmv->tgts[0] == NULL) {
526 mutex_unlock(&lmv->lmv_init_mutex);
527 CERROR("%s: no target configured for index 0.\n",
532 CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
533 lmv->cluuid.uuid, obd->obd_name);
535 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
539 rc = lmv_connect_mdc(obd, tgt);
545 easize = lmv_mds_md_size(lmv->desc.ld_tgt_count, LMV_MAGIC);
546 lmv_init_ea_size(obd->obd_self_export, easize, 0);
547 mutex_unlock(&lmv->lmv_init_mutex);
558 --lmv->desc.ld_active_tgt_count;
559 rc2 = obd_disconnect(tgt->ltd_exp);
561 CERROR("LMV target %s disconnect on "
562 "MDC idx %d: error %d\n",
563 tgt->ltd_uuid.uuid, i, rc2);
568 mutex_unlock(&lmv->lmv_init_mutex);
573 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
575 struct lmv_obd *lmv = &obd->u.lmv;
576 struct obd_device *mdc_obd;
580 LASSERT(tgt != NULL);
581 LASSERT(obd != NULL);
583 mdc_obd = class_exp2obd(tgt->ltd_exp);
586 mdc_obd->obd_force = obd->obd_force;
587 mdc_obd->obd_fail = obd->obd_fail;
588 mdc_obd->obd_no_recov = obd->obd_no_recov;
590 if (lmv->targets_proc_entry != NULL)
591 lprocfs_remove_proc_entry(mdc_obd->obd_name,
592 lmv->targets_proc_entry);
595 rc = obd_fid_fini(tgt->ltd_exp->exp_obd);
597 CERROR("Can't finanize fids factory\n");
599 CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
600 tgt->ltd_exp->exp_obd->obd_name,
601 tgt->ltd_exp->exp_obd->obd_uuid.uuid);
603 obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
604 rc = obd_disconnect(tgt->ltd_exp);
606 if (tgt->ltd_active) {
607 CERROR("Target %s disconnect error %d\n",
608 tgt->ltd_uuid.uuid, rc);
612 lmv_activate_target(lmv, tgt, 0);
617 static int lmv_disconnect(struct obd_export *exp)
619 struct obd_device *obd = class_exp2obd(exp);
620 struct lmv_obd *lmv = &obd->u.lmv;
628 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
629 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
632 lmv_disconnect_mdc(obd, lmv->tgts[i]);
635 if (lmv->targets_proc_entry != NULL)
636 lprocfs_remove(&lmv->targets_proc_entry);
638 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
639 obd->obd_type->typ_name, obd->obd_name);
643 * This is the case when no real connection is established by
644 * lmv_check_connect().
647 class_export_put(exp);
648 rc = class_disconnect(exp);
654 static int lmv_fid2path(struct obd_export *exp, int len, void *karg,
657 struct obd_device *obddev = class_exp2obd(exp);
658 struct lmv_obd *lmv = &obddev->u.lmv;
659 struct getinfo_fid2path *gf;
660 struct lmv_tgt_desc *tgt;
661 struct getinfo_fid2path *remote_gf = NULL;
662 struct lu_fid root_fid;
663 int remote_gf_size = 0;
667 tgt = lmv_find_target(lmv, &gf->gf_fid);
669 RETURN(PTR_ERR(tgt));
671 root_fid = *gf->gf_u.gf_root_fid;
672 LASSERT(fid_is_sane(&root_fid));
675 rc = obd_iocontrol(OBD_IOC_FID2PATH, tgt->ltd_exp, len, gf, uarg);
676 if (rc != 0 && rc != -EREMOTE)
677 GOTO(out_fid2path, rc);
679 /* If remote_gf != NULL, it means just building the
680 * path on the remote MDT, copy this path segement to gf */
681 if (remote_gf != NULL) {
682 struct getinfo_fid2path *ori_gf;
685 ori_gf = (struct getinfo_fid2path *)karg;
686 if (strlen(ori_gf->gf_u.gf_path) +
687 strlen(gf->gf_u.gf_path) > ori_gf->gf_pathlen)
688 GOTO(out_fid2path, rc = -EOVERFLOW);
690 ptr = ori_gf->gf_u.gf_path;
692 memmove(ptr + strlen(gf->gf_u.gf_path) + 1, ptr,
693 strlen(ori_gf->gf_u.gf_path));
695 strncpy(ptr, gf->gf_u.gf_path,
696 strlen(gf->gf_u.gf_path));
697 ptr += strlen(gf->gf_u.gf_path);
701 CDEBUG(D_INFO, "%s: get path %s "DFID" rec: %llu ln: %u\n",
702 tgt->ltd_exp->exp_obd->obd_name,
703 gf->gf_u.gf_path, PFID(&gf->gf_fid), gf->gf_recno,
707 GOTO(out_fid2path, rc);
709 /* sigh, has to go to another MDT to do path building further */
710 if (remote_gf == NULL) {
711 remote_gf_size = sizeof(*remote_gf) + PATH_MAX;
712 OBD_ALLOC(remote_gf, remote_gf_size);
713 if (remote_gf == NULL)
714 GOTO(out_fid2path, rc = -ENOMEM);
715 remote_gf->gf_pathlen = PATH_MAX;
718 if (!fid_is_sane(&gf->gf_fid)) {
719 CERROR("%s: invalid FID "DFID": rc = %d\n",
720 tgt->ltd_exp->exp_obd->obd_name,
721 PFID(&gf->gf_fid), -EINVAL);
722 GOTO(out_fid2path, rc = -EINVAL);
725 tgt = lmv_find_target(lmv, &gf->gf_fid);
727 GOTO(out_fid2path, rc = -EINVAL);
729 remote_gf->gf_fid = gf->gf_fid;
730 remote_gf->gf_recno = -1;
731 remote_gf->gf_linkno = -1;
732 memset(remote_gf->gf_u.gf_path, 0, remote_gf->gf_pathlen);
733 *remote_gf->gf_u.gf_root_fid = root_fid;
735 goto repeat_fid2path;
738 if (remote_gf != NULL)
739 OBD_FREE(remote_gf, remote_gf_size);
743 static int lmv_hsm_req_count(struct lmv_obd *lmv,
744 const struct hsm_user_request *hur,
745 const struct lmv_tgt_desc *tgt_mds)
749 struct lmv_tgt_desc *curr_tgt;
751 /* count how many requests must be sent to the given target */
752 for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
753 curr_tgt = lmv_find_target(lmv, &hur->hur_user_item[i].hui_fid);
754 if (IS_ERR(curr_tgt))
755 RETURN(PTR_ERR(curr_tgt));
756 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid))
762 static int lmv_hsm_req_build(struct lmv_obd *lmv,
763 struct hsm_user_request *hur_in,
764 const struct lmv_tgt_desc *tgt_mds,
765 struct hsm_user_request *hur_out)
768 struct lmv_tgt_desc *curr_tgt;
770 /* build the hsm_user_request for the given target */
771 hur_out->hur_request = hur_in->hur_request;
773 for (i = 0; i < hur_in->hur_request.hr_itemcount; i++) {
774 curr_tgt = lmv_find_target(lmv,
775 &hur_in->hur_user_item[i].hui_fid);
776 if (IS_ERR(curr_tgt))
777 RETURN(PTR_ERR(curr_tgt));
778 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid)) {
779 hur_out->hur_user_item[nr_out] =
780 hur_in->hur_user_item[i];
784 hur_out->hur_request.hr_itemcount = nr_out;
785 memcpy(hur_data(hur_out), hur_data(hur_in),
786 hur_in->hur_request.hr_data_len);
791 static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len,
792 struct lustre_kernelcomm *lk,
799 /* unregister request (call from llapi_hsm_copytool_fini) */
800 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
801 struct lmv_tgt_desc *tgt = lmv->tgts[i];
803 if (tgt == NULL || tgt->ltd_exp == NULL)
805 /* best effort: try to clean as much as possible
806 * (continue on error) */
807 obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
810 /* Whatever the result, remove copytool from kuc groups.
811 * Unreached coordinators will get EPIPE on next requests
812 * and will unregister automatically.
814 rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group);
819 static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len,
820 struct lustre_kernelcomm *lk, __user void *uarg)
825 bool any_set = false;
826 struct kkuc_ct_data kcd = { 0 };
829 /* All or nothing: try to register to all MDS.
830 * In case of failure, unregister from previous MDS,
831 * except if it because of inactive target. */
832 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
833 struct lmv_tgt_desc *tgt = lmv->tgts[i];
835 if (tgt == NULL || tgt->ltd_exp == NULL)
837 err = obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
839 if (tgt->ltd_active) {
840 /* permanent error */
841 CERROR("%s: iocontrol MDC %s on MDT"
842 " idx %d cmd %x: err = %d\n",
843 lmv2obd_dev(lmv)->obd_name,
844 tgt->ltd_uuid.uuid, i, cmd, err);
846 lk->lk_flags |= LK_FLG_STOP;
847 /* unregister from previous MDS */
848 for (j = 0; j < i; j++) {
850 if (tgt == NULL || tgt->ltd_exp == NULL)
852 obd_iocontrol(cmd, tgt->ltd_exp, len,
857 /* else: transient error.
858 * kuc will register to the missing MDT
866 /* no registration done: return error */
869 /* at least one registration done, with no failure */
870 filp = fget(lk->lk_wfd);
874 kcd.kcd_magic = KKUC_CT_DATA_MAGIC;
875 kcd.kcd_uuid = lmv->cluuid;
876 kcd.kcd_archive = lk->lk_data;
878 rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group,
889 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
890 int len, void *karg, void __user *uarg)
892 struct obd_device *obddev = class_exp2obd(exp);
893 struct lmv_obd *lmv = &obddev->u.lmv;
894 struct lmv_tgt_desc *tgt = NULL;
898 __u32 count = lmv->desc.ld_tgt_count;
905 case IOC_OBD_STATFS: {
906 struct obd_ioctl_data *data = karg;
907 struct obd_device *mdc_obd;
908 struct obd_statfs stat_buf = {0};
911 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
912 if ((index >= count))
915 tgt = lmv->tgts[index];
916 if (tgt == NULL || !tgt->ltd_active)
919 mdc_obd = class_exp2obd(tgt->ltd_exp);
924 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
925 min((int) data->ioc_plen2,
926 (int) sizeof(struct obd_uuid))))
929 rc = obd_statfs(NULL, tgt->ltd_exp, &stat_buf,
930 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
934 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
935 min((int) data->ioc_plen1,
936 (int) sizeof(stat_buf))))
940 case OBD_IOC_QUOTACTL: {
941 struct if_quotactl *qctl = karg;
942 struct obd_quotactl *oqctl;
944 if (qctl->qc_valid == QC_MDTIDX) {
945 if (count <= qctl->qc_idx)
948 tgt = lmv->tgts[qctl->qc_idx];
949 if (tgt == NULL || tgt->ltd_exp == NULL)
951 } else if (qctl->qc_valid == QC_UUID) {
952 for (i = 0; i < count; i++) {
956 if (!obd_uuid_equals(&tgt->ltd_uuid,
960 if (tgt->ltd_exp == NULL)
972 LASSERT(tgt != NULL && tgt->ltd_exp != NULL);
973 OBD_ALLOC_PTR(oqctl);
977 QCTL_COPY(oqctl, qctl);
978 rc = obd_quotactl(tgt->ltd_exp, oqctl);
980 QCTL_COPY(qctl, oqctl);
981 qctl->qc_valid = QC_MDTIDX;
982 qctl->obd_uuid = tgt->ltd_uuid;
987 case LL_IOC_GET_CONNECT_FLAGS: {
989 if (tgt == NULL || tgt->ltd_exp == NULL)
991 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
994 case LL_IOC_FID2MDTIDX: {
995 struct lu_fid *fid = karg;
998 rc = lmv_fld_lookup(lmv, fid, &mdt_index);
1002 /* Note: this is from llite(see ll_dir_ioctl()), @uarg does not
1003 * point to user space memory for FID2MDTIDX. */
1004 *(__u32 *)uarg = mdt_index;
1007 case OBD_IOC_FID2PATH: {
1008 rc = lmv_fid2path(exp, len, karg, uarg);
1011 case LL_IOC_HSM_STATE_GET:
1012 case LL_IOC_HSM_STATE_SET:
1013 case LL_IOC_HSM_ACTION: {
1014 struct md_op_data *op_data = karg;
1016 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1018 RETURN(PTR_ERR(tgt));
1020 if (tgt->ltd_exp == NULL)
1023 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1026 case LL_IOC_HSM_PROGRESS: {
1027 const struct hsm_progress_kernel *hpk = karg;
1029 tgt = lmv_find_target(lmv, &hpk->hpk_fid);
1031 RETURN(PTR_ERR(tgt));
1032 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1035 case LL_IOC_HSM_REQUEST: {
1036 struct hsm_user_request *hur = karg;
1037 unsigned int reqcount = hur->hur_request.hr_itemcount;
1042 /* if the request is about a single fid
1043 * or if there is a single MDS, no need to split
1045 if (reqcount == 1 || count == 1) {
1046 tgt = lmv_find_target(lmv,
1047 &hur->hur_user_item[0].hui_fid);
1049 RETURN(PTR_ERR(tgt));
1050 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1052 /* split fid list to their respective MDS */
1053 for (i = 0; i < count; i++) {
1056 struct hsm_user_request *req;
1059 if (tgt == NULL || tgt->ltd_exp == NULL)
1062 nr = lmv_hsm_req_count(lmv, hur, tgt);
1065 if (nr == 0) /* nothing for this MDS */
1068 /* build a request with fids for this MDS */
1069 reqlen = offsetof(typeof(*hur),
1071 + hur->hur_request.hr_data_len;
1072 OBD_ALLOC_LARGE(req, reqlen);
1075 rc1 = lmv_hsm_req_build(lmv, hur, tgt, req);
1077 GOTO(hsm_req_err, rc1);
1078 rc1 = obd_iocontrol(cmd, tgt->ltd_exp, reqlen,
1081 if (rc1 != 0 && rc == 0)
1083 OBD_FREE_LARGE(req, reqlen);
1088 case LL_IOC_LOV_SWAP_LAYOUTS: {
1089 struct md_op_data *op_data = karg;
1090 struct lmv_tgt_desc *tgt1, *tgt2;
1092 tgt1 = lmv_find_target(lmv, &op_data->op_fid1);
1094 RETURN(PTR_ERR(tgt1));
1096 tgt2 = lmv_find_target(lmv, &op_data->op_fid2);
1098 RETURN(PTR_ERR(tgt2));
1100 if ((tgt1->ltd_exp == NULL) || (tgt2->ltd_exp == NULL))
1103 /* only files on same MDT can have their layouts swapped */
1104 if (tgt1->ltd_idx != tgt2->ltd_idx)
1107 rc = obd_iocontrol(cmd, tgt1->ltd_exp, len, karg, uarg);
1110 case LL_IOC_HSM_CT_START: {
1111 struct lustre_kernelcomm *lk = karg;
1112 if (lk->lk_flags & LK_FLG_STOP)
1113 rc = lmv_hsm_ct_unregister(lmv, cmd, len, lk, uarg);
1115 rc = lmv_hsm_ct_register(lmv, cmd, len, lk, uarg);
1119 for (i = 0; i < count; i++) {
1120 struct obd_device *mdc_obd;
1124 if (tgt == NULL || tgt->ltd_exp == NULL)
1126 /* ll_umount_begin() sets force flag but for lmv, not
1127 * mdc. Let's pass it through */
1128 mdc_obd = class_exp2obd(tgt->ltd_exp);
1129 mdc_obd->obd_force = obddev->obd_force;
1130 err = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1132 if (tgt->ltd_active) {
1133 CERROR("error: iocontrol MDC %s on MDT"
1134 " idx %d cmd %x: err = %d\n",
1135 tgt->ltd_uuid.uuid, i, cmd, err);
1149 * This is _inode_ placement policy function (not name).
1151 static int lmv_placement_policy(struct obd_device *obd,
1152 struct md_op_data *op_data, u32 *mds)
1154 struct lmv_obd *lmv = &obd->u.lmv;
1155 struct lmv_user_md *lum;
1159 LASSERT(mds != NULL);
1161 if (lmv->desc.ld_tgt_count == 1) {
1166 lum = op_data->op_data;
1168 * 1. See if the stripe offset is specified by lum.
1169 * 2. Then check if there is default stripe offset.
1170 * 3. Finally choose MDS by name hash if the parent
1171 * is striped directory. (see lmv_locate_mds()). */
1172 if (op_data->op_cli_flags & CLI_SET_MEA && lum != NULL &&
1173 le32_to_cpu(lum->lum_stripe_offset) != (__u32)-1) {
1174 *mds = le32_to_cpu(lum->lum_stripe_offset);
1175 } else if (op_data->op_default_stripe_offset != (__u32)-1) {
1176 *mds = op_data->op_default_stripe_offset;
1177 op_data->op_mds = *mds;
1178 /* Correct the stripe offset in lum */
1180 lum->lum_stripe_offset = cpu_to_le32(*mds);
1182 *mds = op_data->op_mds;
1188 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds)
1190 struct lmv_tgt_desc *tgt;
1194 tgt = lmv_get_target(lmv, mds, NULL);
1196 RETURN(PTR_ERR(tgt));
1199 * New seq alloc and FLD setup should be atomic. Otherwise we may find
1200 * on server that seq in new allocated fid is not yet known.
1202 mutex_lock(&tgt->ltd_fid_mutex);
1204 if (tgt->ltd_active == 0 || tgt->ltd_exp == NULL)
1205 GOTO(out, rc = -ENODEV);
1208 * Asking underlying tgt layer to allocate new fid.
1210 rc = obd_fid_alloc(NULL, tgt->ltd_exp, fid, NULL);
1212 LASSERT(fid_is_sane(fid));
1218 mutex_unlock(&tgt->ltd_fid_mutex);
1222 int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
1223 struct lu_fid *fid, struct md_op_data *op_data)
1225 struct obd_device *obd = class_exp2obd(exp);
1226 struct lmv_obd *lmv = &obd->u.lmv;
1231 LASSERT(op_data != NULL);
1232 LASSERT(fid != NULL);
1234 rc = lmv_placement_policy(obd, op_data, &mds);
1236 CERROR("Can't get target for allocating fid, "
1241 rc = __lmv_fid_alloc(lmv, fid, mds);
1243 CERROR("Can't alloc new fid, rc %d\n", rc);
1250 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1252 struct lmv_obd *lmv = &obd->u.lmv;
1253 struct lmv_desc *desc;
1257 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1258 CERROR("LMV setup requires a descriptor\n");
1262 desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1263 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1264 CERROR("Lmv descriptor size wrong: %d > %d\n",
1265 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1269 lmv->tgts_size = 32U;
1270 OBD_ALLOC(lmv->tgts, sizeof(*lmv->tgts) * lmv->tgts_size);
1271 if (lmv->tgts == NULL)
1274 obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1275 lmv->desc.ld_tgt_count = 0;
1276 lmv->desc.ld_active_tgt_count = 0;
1277 lmv->max_def_easize = 0;
1278 lmv->max_easize = 0;
1280 spin_lock_init(&lmv->lmv_lock);
1281 mutex_init(&lmv->lmv_init_mutex);
1283 #ifdef CONFIG_PROC_FS
1284 obd->obd_vars = lprocfs_lmv_obd_vars;
1285 lprocfs_obd_setup(obd, true);
1286 lprocfs_alloc_md_stats(obd, 0);
1287 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
1288 0444, &lmv_proc_target_fops, obd);
1290 CWARN("%s: error adding LMV target_obd file: rc = %d\n",
1293 rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1294 LUSTRE_CLI_FLD_HASH_DHT);
1296 CERROR("Can't init FLD, err %d\n", rc);
1306 static int lmv_cleanup(struct obd_device *obd)
1308 struct lmv_obd *lmv = &obd->u.lmv;
1311 fld_client_fini(&lmv->lmv_fld);
1312 if (lmv->tgts != NULL) {
1314 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1315 if (lmv->tgts[i] == NULL)
1317 lmv_del_target(lmv, i);
1319 OBD_FREE(lmv->tgts, sizeof(*lmv->tgts) * lmv->tgts_size);
1325 static int lmv_process_config(struct obd_device *obd, size_t len, void *buf)
1327 struct lustre_cfg *lcfg = buf;
1328 struct obd_uuid obd_uuid;
1334 switch (lcfg->lcfg_command) {
1336 /* modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID
1337 * 2:0 3:1 4:lustre-MDT0000-mdc_UUID */
1338 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
1339 GOTO(out, rc = -EINVAL);
1341 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
1343 if (sscanf(lustre_cfg_buf(lcfg, 2), "%u", &index) != 1)
1344 GOTO(out, rc = -EINVAL);
1345 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
1346 GOTO(out, rc = -EINVAL);
1347 rc = lmv_add_target(obd, &obd_uuid, index, gen);
1350 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1351 GOTO(out, rc = -EINVAL);
1357 static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
1358 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1360 struct obd_device *obd = class_exp2obd(exp);
1361 struct lmv_obd *lmv = &obd->u.lmv;
1362 struct obd_statfs *temp;
1367 OBD_ALLOC(temp, sizeof(*temp));
1371 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1372 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1375 rc = obd_statfs(env, lmv->tgts[i]->ltd_exp, temp,
1378 CERROR("can't stat MDS #%d (%s), error %d\n", i,
1379 lmv->tgts[i]->ltd_exp->exp_obd->obd_name,
1381 GOTO(out_free_temp, rc);
1386 /* If the statfs is from mount, it will needs
1387 * retrieve necessary information from MDT0.
1388 * i.e. mount does not need the merged osfs
1390 * And also clients can be mounted as long as
1391 * MDT0 is in service*/
1392 if (flags & OBD_STATFS_FOR_MDT0)
1393 GOTO(out_free_temp, rc);
1395 osfs->os_bavail += temp->os_bavail;
1396 osfs->os_blocks += temp->os_blocks;
1397 osfs->os_ffree += temp->os_ffree;
1398 osfs->os_files += temp->os_files;
1404 OBD_FREE(temp, sizeof(*temp));
1408 static int lmv_get_root(struct obd_export *exp, const char *fileset,
1411 struct obd_device *obd = exp->exp_obd;
1412 struct lmv_obd *lmv = &obd->u.lmv;
1416 rc = md_get_root(lmv->tgts[0]->ltd_exp, fileset, fid);
1420 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1421 u64 valid, const char *name,
1422 const char *input, int input_size, int output_size,
1423 int flags, struct ptlrpc_request **request)
1425 struct obd_device *obd = exp->exp_obd;
1426 struct lmv_obd *lmv = &obd->u.lmv;
1427 struct lmv_tgt_desc *tgt;
1431 tgt = lmv_find_target(lmv, fid);
1433 RETURN(PTR_ERR(tgt));
1435 rc = md_getxattr(tgt->ltd_exp, fid, valid, name, input,
1436 input_size, output_size, flags, request);
1441 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1442 u64 valid, const char *name,
1443 const char *input, int input_size, int output_size,
1444 int flags, __u32 suppgid,
1445 struct ptlrpc_request **request)
1447 struct obd_device *obd = exp->exp_obd;
1448 struct lmv_obd *lmv = &obd->u.lmv;
1449 struct lmv_tgt_desc *tgt;
1453 tgt = lmv_find_target(lmv, fid);
1455 RETURN(PTR_ERR(tgt));
1457 rc = md_setxattr(tgt->ltd_exp, fid, valid, name, input,
1458 input_size, output_size, flags, suppgid,
1464 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1465 struct ptlrpc_request **request)
1467 struct obd_device *obd = exp->exp_obd;
1468 struct lmv_obd *lmv = &obd->u.lmv;
1469 struct lmv_tgt_desc *tgt;
1473 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1475 RETURN(PTR_ERR(tgt));
1477 if (op_data->op_flags & MF_GET_MDT_IDX) {
1478 op_data->op_mds = tgt->ltd_idx;
1482 rc = md_getattr(tgt->ltd_exp, op_data, request);
1487 static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
1489 struct obd_device *obd = exp->exp_obd;
1490 struct lmv_obd *lmv = &obd->u.lmv;
1494 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1497 * With DNE every object can have two locks in different namespaces:
1498 * lookup lock in space of MDT storing direntry and update/open lock in
1499 * space of MDT storing inode.
1501 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1502 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1504 md_null_inode(lmv->tgts[i]->ltd_exp, fid);
1510 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1511 struct md_open_data *mod, struct ptlrpc_request **request)
1513 struct obd_device *obd = exp->exp_obd;
1514 struct lmv_obd *lmv = &obd->u.lmv;
1515 struct lmv_tgt_desc *tgt;
1519 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1521 RETURN(PTR_ERR(tgt));
1523 CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1524 rc = md_close(tgt->ltd_exp, op_data, mod, request);
1529 * Choosing the MDT by name or FID in @op_data.
1530 * For non-striped directory, it will locate MDT by fid.
1531 * For striped-directory, it will locate MDT by name. And also
1532 * it will reset op_fid1 with the FID of the choosen stripe.
1534 struct lmv_tgt_desc *
1535 lmv_locate_target_for_name(struct lmv_obd *lmv, struct lmv_stripe_md *lsm,
1536 const char *name, int namelen, struct lu_fid *fid,
1539 struct lmv_tgt_desc *tgt;
1540 const struct lmv_oinfo *oinfo;
1542 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_NAME_HASH)) {
1543 if (cfs_fail_val >= lsm->lsm_md_stripe_count)
1544 RETURN(ERR_PTR(-EBADF));
1545 oinfo = &lsm->lsm_md_oinfo[cfs_fail_val];
1547 oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
1549 RETURN(ERR_CAST(oinfo));
1553 *fid = oinfo->lmo_fid;
1555 *mds = oinfo->lmo_mds;
1557 tgt = lmv_get_target(lmv, oinfo->lmo_mds, NULL);
1559 CDEBUG(D_INFO, "locate on mds %u "DFID"\n", oinfo->lmo_mds,
1560 PFID(&oinfo->lmo_fid));
1565 * Locate mds by fid or name
1567 * For striped directory (lsm != NULL), it will locate the stripe
1568 * by name hash (see lsm_name_to_stripe_info()). Note: if the hash_type
1569 * is unknown, it will return -EBADFD, and lmv_intent_lookup might need
1570 * walk through all of stripes to locate the entry.
1572 * For normal direcotry, it will locate MDS by FID directly.
1573 * \param[in] lmv LMV device
1574 * \param[in] op_data client MD stack parameters, name, namelen
1576 * \param[in] fid object FID used to locate MDS.
1578 * retval pointer to the lmv_tgt_desc if succeed.
1579 * ERR_PTR(errno) if failed.
1581 struct lmv_tgt_desc*
1582 lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1585 struct lmv_stripe_md *lsm = op_data->op_mea1;
1586 struct lmv_tgt_desc *tgt;
1588 /* During creating VOLATILE file, it should honor the mdt
1589 * index if the file under striped dir is being restored, see
1591 if (op_data->op_bias & MDS_CREATE_VOLATILE &&
1592 (int)op_data->op_mds != -1) {
1594 tgt = lmv_get_target(lmv, op_data->op_mds, NULL);
1599 /* refill the right parent fid */
1600 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1601 struct lmv_oinfo *oinfo;
1603 oinfo = &lsm->lsm_md_oinfo[i];
1604 if (oinfo->lmo_mds == op_data->op_mds) {
1605 *fid = oinfo->lmo_fid;
1610 if (i == lsm->lsm_md_stripe_count)
1611 *fid = lsm->lsm_md_oinfo[0].lmo_fid;
1617 if (lsm == NULL || op_data->op_namelen == 0) {
1618 tgt = lmv_find_target(lmv, fid);
1622 op_data->op_mds = tgt->ltd_idx;
1626 return lmv_locate_target_for_name(lmv, lsm, op_data->op_name,
1627 op_data->op_namelen, fid,
1631 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1632 const void *data, size_t datalen, umode_t mode, uid_t uid,
1633 gid_t gid, cfs_cap_t cap_effective, __u64 rdev,
1634 struct ptlrpc_request **request)
1636 struct obd_device *obd = exp->exp_obd;
1637 struct lmv_obd *lmv = &obd->u.lmv;
1638 struct lmv_tgt_desc *tgt;
1642 if (!lmv->desc.ld_active_tgt_count)
1645 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1647 RETURN(PTR_ERR(tgt));
1649 CDEBUG(D_INODE, "CREATE name '%.*s' on "DFID" -> mds #%x\n",
1650 (int)op_data->op_namelen, op_data->op_name,
1651 PFID(&op_data->op_fid1), op_data->op_mds);
1653 rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
1656 if (exp_connect_flags(exp) & OBD_CONNECT_DIR_STRIPE) {
1657 /* Send the create request to the MDT where the object
1658 * will be located */
1659 tgt = lmv_find_target(lmv, &op_data->op_fid2);
1661 RETURN(PTR_ERR(tgt));
1663 op_data->op_mds = tgt->ltd_idx;
1665 CDEBUG(D_CONFIG, "Server doesn't support striped dirs\n");
1668 CDEBUG(D_INODE, "CREATE obj "DFID" -> mds #%x\n",
1669 PFID(&op_data->op_fid2), op_data->op_mds);
1671 op_data->op_flags |= MF_MDC_CANCEL_FID1;
1672 rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1673 cap_effective, rdev, request);
1675 if (*request == NULL)
1677 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1683 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1684 const union ldlm_policy_data *policy, struct md_op_data *op_data,
1685 struct lustre_handle *lockh, __u64 extra_lock_flags)
1687 struct obd_device *obd = exp->exp_obd;
1688 struct lmv_obd *lmv = &obd->u.lmv;
1689 struct lmv_tgt_desc *tgt;
1693 CDEBUG(D_INODE, "ENQUEUE on "DFID"\n", PFID(&op_data->op_fid1));
1695 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1697 RETURN(PTR_ERR(tgt));
1699 CDEBUG(D_INODE, "ENQUEUE on "DFID" -> mds #%u\n",
1700 PFID(&op_data->op_fid1), tgt->ltd_idx);
1702 rc = md_enqueue(tgt->ltd_exp, einfo, policy, op_data, lockh,
1709 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1710 struct ptlrpc_request **preq)
1712 struct ptlrpc_request *req = NULL;
1713 struct obd_device *obd = exp->exp_obd;
1714 struct lmv_obd *lmv = &obd->u.lmv;
1715 struct lmv_tgt_desc *tgt;
1716 struct mdt_body *body;
1720 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1722 RETURN(PTR_ERR(tgt));
1724 CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" -> mds #%d\n",
1725 (int)op_data->op_namelen, op_data->op_name,
1726 PFID(&op_data->op_fid1), tgt->ltd_idx);
1728 rc = md_getattr_name(tgt->ltd_exp, op_data, preq);
1732 body = req_capsule_server_get(&(*preq)->rq_pill, &RMF_MDT_BODY);
1733 LASSERT(body != NULL);
1735 if (body->mbo_valid & OBD_MD_MDS) {
1736 struct lu_fid rid = body->mbo_fid1;
1737 CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1740 tgt = lmv_find_target(lmv, &rid);
1742 ptlrpc_req_finished(*preq);
1744 RETURN(PTR_ERR(tgt));
1747 op_data->op_fid1 = rid;
1748 op_data->op_valid |= OBD_MD_FLCROSSREF;
1749 op_data->op_namelen = 0;
1750 op_data->op_name = NULL;
1751 rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
1752 ptlrpc_req_finished(*preq);
1759 #define md_op_data_fid(op_data, fl) \
1760 (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1761 fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1762 fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1763 fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1766 static int lmv_early_cancel(struct obd_export *exp, struct lmv_tgt_desc *tgt,
1767 struct md_op_data *op_data, __u32 op_tgt,
1768 enum ldlm_mode mode, int bits, int flag)
1770 struct lu_fid *fid = md_op_data_fid(op_data, flag);
1771 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
1772 union ldlm_policy_data policy = { { 0 } };
1776 if (!fid_is_sane(fid))
1780 tgt = lmv_find_target(lmv, fid);
1782 RETURN(PTR_ERR(tgt));
1785 if (tgt->ltd_idx != op_tgt) {
1786 CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1787 policy.l_inodebits.bits = bits;
1788 rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1789 mode, LCF_ASYNC, NULL);
1792 "EARLY_CANCEL skip operation target %d on "DFID"\n",
1794 op_data->op_flags |= flag;
1802 * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1805 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1806 struct ptlrpc_request **request)
1808 struct obd_device *obd = exp->exp_obd;
1809 struct lmv_obd *lmv = &obd->u.lmv;
1810 struct lmv_tgt_desc *tgt;
1814 LASSERT(op_data->op_namelen != 0);
1816 CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
1817 PFID(&op_data->op_fid2), (int)op_data->op_namelen,
1818 op_data->op_name, PFID(&op_data->op_fid1));
1820 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
1821 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
1822 op_data->op_cap = cfs_curproc_cap_pack();
1823 if (op_data->op_mea2 != NULL) {
1824 struct lmv_stripe_md *lsm = op_data->op_mea2;
1825 const struct lmv_oinfo *oinfo;
1827 oinfo = lsm_name_to_stripe_info(lsm, op_data->op_name,
1828 op_data->op_namelen);
1830 RETURN(PTR_ERR(oinfo));
1832 op_data->op_fid2 = oinfo->lmo_fid;
1835 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
1837 RETURN(PTR_ERR(tgt));
1840 * Cancel UPDATE lock on child (fid1).
1842 op_data->op_flags |= MF_MDC_CANCEL_FID2;
1843 rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_idx, LCK_EX,
1844 MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
1848 rc = md_link(tgt->ltd_exp, op_data, request);
1853 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
1854 const char *old, size_t oldlen,
1855 const char *new, size_t newlen,
1856 struct ptlrpc_request **request)
1858 struct obd_device *obd = exp->exp_obd;
1859 struct lmv_obd *lmv = &obd->u.lmv;
1860 struct lmv_tgt_desc *src_tgt;
1861 struct lmv_tgt_desc *tgt_tgt;
1862 struct obd_export *target_exp;
1863 struct mdt_body *body;
1867 LASSERT(oldlen != 0);
1869 CDEBUG(D_INODE, "RENAME %.*s in "DFID":%d to %.*s in "DFID":%d\n",
1870 (int)oldlen, old, PFID(&op_data->op_fid1),
1871 op_data->op_mea1 ? op_data->op_mea1->lsm_md_stripe_count : 0,
1872 (int)newlen, new, PFID(&op_data->op_fid2),
1873 op_data->op_mea2 ? op_data->op_mea2->lsm_md_stripe_count : 0);
1875 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
1876 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
1877 op_data->op_cap = cfs_curproc_cap_pack();
1878 if (op_data->op_cli_flags & CLI_MIGRATE) {
1879 LASSERTF(fid_is_sane(&op_data->op_fid3), "invalid FID "DFID"\n",
1880 PFID(&op_data->op_fid3));
1882 if (op_data->op_mea1 != NULL) {
1883 struct lmv_stripe_md *lsm = op_data->op_mea1;
1884 struct lmv_tgt_desc *tmp;
1886 /* Fix the parent fid for striped dir */
1887 tmp = lmv_locate_target_for_name(lmv, lsm, old,
1892 RETURN(PTR_ERR(tmp));
1895 rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
1899 src_tgt = lmv_find_target(lmv, &op_data->op_fid3);
1900 if (IS_ERR(src_tgt))
1901 RETURN(PTR_ERR(src_tgt));
1903 target_exp = src_tgt->ltd_exp;
1905 if (op_data->op_mea1 != NULL) {
1906 struct lmv_stripe_md *lsm = op_data->op_mea1;
1908 src_tgt = lmv_locate_target_for_name(lmv, lsm, old,
1913 src_tgt = lmv_find_target(lmv, &op_data->op_fid1);
1915 if (IS_ERR(src_tgt))
1916 RETURN(PTR_ERR(src_tgt));
1919 if (op_data->op_mea2 != NULL) {
1920 struct lmv_stripe_md *lsm = op_data->op_mea2;
1922 tgt_tgt = lmv_locate_target_for_name(lmv, lsm, new,
1927 tgt_tgt = lmv_find_target(lmv, &op_data->op_fid2);
1930 if (IS_ERR(tgt_tgt))
1931 RETURN(PTR_ERR(tgt_tgt));
1933 target_exp = tgt_tgt->ltd_exp;
1937 * LOOKUP lock on src child (fid3) should also be cancelled for
1938 * src_tgt in mdc_rename.
1940 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
1943 * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
1946 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
1947 LCK_EX, MDS_INODELOCK_UPDATE,
1948 MF_MDC_CANCEL_FID2);
1953 * Cancel LOOKUP locks on source child (fid3) for parent tgt_tgt.
1955 if (fid_is_sane(&op_data->op_fid3)) {
1956 struct lmv_tgt_desc *tgt;
1958 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1960 RETURN(PTR_ERR(tgt));
1962 /* Cancel LOOKUP lock on its parent */
1963 rc = lmv_early_cancel(exp, tgt, op_data, src_tgt->ltd_idx,
1964 LCK_EX, MDS_INODELOCK_LOOKUP,
1965 MF_MDC_CANCEL_FID3);
1969 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
1970 LCK_EX, MDS_INODELOCK_FULL,
1971 MF_MDC_CANCEL_FID3);
1978 * Cancel all the locks on tgt child (fid4).
1980 if (fid_is_sane(&op_data->op_fid4)) {
1981 struct lmv_tgt_desc *tgt;
1983 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
1984 LCK_EX, MDS_INODELOCK_FULL,
1985 MF_MDC_CANCEL_FID4);
1989 tgt = lmv_find_target(lmv, &op_data->op_fid4);
1991 RETURN(PTR_ERR(tgt));
1993 /* Since the target child might be destroyed, and it might
1994 * become orphan, and we can only check orphan on the local
1995 * MDT right now, so we send rename request to the MDT where
1996 * target child is located. If target child does not exist,
1997 * then it will send the request to the target parent */
1998 target_exp = tgt->ltd_exp;
2001 rc = md_rename(target_exp, op_data, old, oldlen, new, newlen,
2004 if (rc != 0 && rc != -EXDEV)
2007 body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2011 /* Not cross-ref case, just get out of here. */
2012 if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2015 CDEBUG(D_INODE, "%s: try rename to another MDT for "DFID"\n",
2016 exp->exp_obd->obd_name, PFID(&body->mbo_fid1));
2018 op_data->op_fid4 = body->mbo_fid1;
2019 ptlrpc_req_finished(*request);
2024 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2025 void *ea, size_t ealen, struct ptlrpc_request **request)
2027 struct obd_device *obd = exp->exp_obd;
2028 struct lmv_obd *lmv = &obd->u.lmv;
2029 struct lmv_tgt_desc *tgt;
2033 CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x\n",
2034 PFID(&op_data->op_fid1), op_data->op_attr.ia_valid);
2036 op_data->op_flags |= MF_MDC_CANCEL_FID1;
2037 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2039 RETURN(PTR_ERR(tgt));
2041 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, request);
2046 static int lmv_fsync(struct obd_export *exp, const struct lu_fid *fid,
2047 struct ptlrpc_request **request)
2049 struct obd_device *obd = exp->exp_obd;
2050 struct lmv_obd *lmv = &obd->u.lmv;
2051 struct lmv_tgt_desc *tgt;
2055 tgt = lmv_find_target(lmv, fid);
2057 RETURN(PTR_ERR(tgt));
2059 rc = md_fsync(tgt->ltd_exp, fid, request);
2063 struct stripe_dirent {
2064 struct page *sd_page;
2065 struct lu_dirpage *sd_dp;
2066 struct lu_dirent *sd_ent;
2070 struct lmv_dir_ctxt {
2071 struct lmv_obd *ldc_lmv;
2072 struct md_op_data *ldc_op_data;
2073 struct md_callback *ldc_cb_op;
2076 struct stripe_dirent ldc_stripes[0];
2079 static inline void put_stripe_dirent(struct stripe_dirent *stripe)
2081 if (stripe->sd_page) {
2082 kunmap(stripe->sd_page);
2083 put_page(stripe->sd_page);
2084 stripe->sd_page = NULL;
2088 static inline void put_lmv_dir_ctxt(struct lmv_dir_ctxt *ctxt)
2092 for (i = 0; i < ctxt->ldc_count; i++)
2093 put_stripe_dirent(&ctxt->ldc_stripes[i]);
2096 static struct lu_dirent *stripe_dirent_next(struct lmv_dir_ctxt *ctxt,
2097 struct stripe_dirent *stripe,
2100 struct lu_dirent *ent = stripe->sd_ent;
2101 __u64 hash = ctxt->ldc_hash;
2106 LASSERT(stripe == &ctxt->ldc_stripes[stripe_index]);
2109 ent = lu_dirent_next(ent);
2112 end = le64_to_cpu(stripe->sd_dp->ldp_hash_end);
2114 put_stripe_dirent(stripe);
2116 if (end == MDS_DIR_END_OFF) {
2117 stripe->sd_ent = NULL;
2118 stripe->sd_eof = true;
2121 LASSERT(hash <= end);
2127 struct md_op_data *op_data = ctxt->ldc_op_data;
2128 struct lmv_oinfo *oinfo;
2129 struct lu_fid fid = op_data->op_fid1;
2130 struct inode *inode = op_data->op_data;
2131 struct lmv_tgt_desc *tgt;
2133 LASSERT(!stripe->sd_page);
2135 oinfo = &op_data->op_mea1->lsm_md_oinfo[stripe_index];
2136 tgt = lmv_get_target(ctxt->ldc_lmv, oinfo->lmo_mds, NULL);
2138 GOTO(out, rc = PTR_ERR(tgt));
2140 /* op_data will be shared by each stripe, so we need
2141 * reset these value for each stripe */
2142 op_data->op_fid1 = oinfo->lmo_fid;
2143 op_data->op_fid2 = oinfo->lmo_fid;
2144 op_data->op_data = oinfo->lmo_root;
2146 rc = md_read_page(tgt->ltd_exp, op_data, ctxt->ldc_cb_op, hash,
2149 op_data->op_fid1 = fid;
2150 op_data->op_fid2 = fid;
2151 op_data->op_data = inode;
2156 stripe->sd_dp = page_address(stripe->sd_page);
2157 ent = lu_dirent_start(stripe->sd_dp);
2160 for (; ent; ent = lu_dirent_next(ent)) {
2161 /* Skip dummy entry */
2162 if (le16_to_cpu(ent->lde_namelen) == 0)
2165 /* skip . and .. for other stripes */
2167 (strncmp(ent->lde_name, ".",
2168 le16_to_cpu(ent->lde_namelen)) == 0 ||
2169 strncmp(ent->lde_name, "..",
2170 le16_to_cpu(ent->lde_namelen)) == 0))
2173 if (le64_to_cpu(ent->lde_hash) < hash)
2184 stripe->sd_ent = ent;
2185 /* treat error as eof, so dir can be partially accessed */
2187 put_stripe_dirent(stripe);
2188 stripe->sd_eof = true;
2189 LCONSOLE_WARN("dir "DFID" stripe %d readdir failed: %d, "
2190 "directory is partially accessed!\n",
2191 PFID(&ctxt->ldc_op_data->op_fid1), stripe_index,
2198 * Get dirent with the closest hash for striped directory
2200 * This function will search the dir entry, whose hash value is the
2201 * closest(>=) to hash from all of sub-stripes, and it is only being called
2202 * for striped directory.
2204 * \param[in] ctxt dir read context
2206 * \retval dirent get the entry successfully
2207 * NULL does not get the entry, normally it means
2208 * it reaches the end of the directory, while read
2209 * stripe dirent error is ignored to allow partial
2212 static struct lu_dirent *lmv_dirent_next(struct lmv_dir_ctxt *ctxt)
2214 struct stripe_dirent *stripe;
2215 struct lu_dirent *ent = NULL;
2219 /* TODO: optimize with k-way merge sort */
2220 for (i = 0; i < ctxt->ldc_count; i++) {
2221 stripe = &ctxt->ldc_stripes[i];
2225 if (!stripe->sd_ent) {
2226 /* locate starting entry */
2227 stripe_dirent_next(ctxt, stripe, i);
2228 if (!stripe->sd_ent) {
2229 LASSERT(stripe->sd_eof);
2235 le64_to_cpu(ctxt->ldc_stripes[min].sd_ent->lde_hash) >
2236 le64_to_cpu(stripe->sd_ent->lde_hash)) {
2238 if (le64_to_cpu(stripe->sd_ent->lde_hash) ==
2245 stripe = &ctxt->ldc_stripes[min];
2246 ent = stripe->sd_ent;
2247 /* pop found dirent */
2248 stripe_dirent_next(ctxt, stripe, min);
2255 * Build dir entry page for striped directory
2257 * This function gets one entry by @offset from a striped directory. It will
2258 * read entries from all of stripes, and choose one closest to the required
2259 * offset(&offset). A few notes
2260 * 1. skip . and .. for non-zero stripes, because there can only have one .
2261 * and .. in a directory.
2262 * 2. op_data will be shared by all of stripes, instead of allocating new
2263 * one, so need to restore before reusing.
2265 * \param[in] exp obd export refer to LMV
2266 * \param[in] op_data hold those MD parameters of read_entry
2267 * \param[in] cb_op ldlm callback being used in enqueue in mdc_read_entry
2268 * \param[in] offset starting hash offset
2269 * \param[out] ppage the page holding the entry. Note: because the entry
2270 * will be accessed in upper layer, so we need hold the
2271 * page until the usages of entry is finished, see
2272 * ll_dir_entry_next.
2274 * retval =0 if get entry successfully
2275 * <0 cannot get entry
2277 static int lmv_striped_read_page(struct obd_export *exp,
2278 struct md_op_data *op_data,
2279 struct md_callback *cb_op,
2280 __u64 offset, struct page **ppage)
2282 struct page *page = NULL;
2283 struct lu_dirpage *dp;
2285 struct lu_dirent *ent;
2286 struct lu_dirent *last_ent;
2288 struct lmv_dir_ctxt *ctxt;
2289 struct lu_dirent *next = NULL;
2295 /* Allocate a page and read entries from all of stripes and fill
2296 * the page by hash order */
2297 page = alloc_page(GFP_KERNEL);
2301 /* Initialize the entry page */
2303 memset(dp, 0, sizeof(*dp));
2304 dp->ldp_hash_start = cpu_to_le64(offset);
2307 left_bytes = PAGE_SIZE - sizeof(*dp);
2311 /* initalize dir read context */
2312 stripe_count = op_data->op_mea1->lsm_md_stripe_count;
2313 OBD_ALLOC(ctxt, offsetof(typeof(*ctxt), ldc_stripes[stripe_count]));
2315 GOTO(free_page, rc = -ENOMEM);
2316 ctxt->ldc_lmv = &exp->exp_obd->u.lmv;
2317 ctxt->ldc_op_data = op_data;
2318 ctxt->ldc_cb_op = cb_op;
2319 ctxt->ldc_hash = offset;
2320 ctxt->ldc_count = stripe_count;
2323 next = lmv_dirent_next(ctxt);
2325 /* end of directory */
2327 ctxt->ldc_hash = MDS_DIR_END_OFF;
2330 ctxt->ldc_hash = le64_to_cpu(next->lde_hash);
2332 ent_size = le16_to_cpu(next->lde_reclen);
2334 /* the last entry lde_reclen is 0, but it might not be the last
2335 * one of this temporay dir page */
2337 ent_size = lu_dirent_calc_size(
2338 le16_to_cpu(next->lde_namelen),
2339 le32_to_cpu(next->lde_attrs));
2341 if (ent_size > left_bytes)
2344 memcpy(ent, next, ent_size);
2346 /* Replace . with master FID and Replace .. with the parent FID
2347 * of master object */
2348 if (strncmp(ent->lde_name, ".",
2349 le16_to_cpu(ent->lde_namelen)) == 0 &&
2350 le16_to_cpu(ent->lde_namelen) == 1)
2351 fid_cpu_to_le(&ent->lde_fid, &op_data->op_fid1);
2352 else if (strncmp(ent->lde_name, "..",
2353 le16_to_cpu(ent->lde_namelen)) == 0 &&
2354 le16_to_cpu(ent->lde_namelen) == 2)
2355 fid_cpu_to_le(&ent->lde_fid, &op_data->op_fid3);
2357 CDEBUG(D_INODE, "entry %.*s hash %#llx\n",
2358 le16_to_cpu(ent->lde_namelen), ent->lde_name,
2359 le64_to_cpu(ent->lde_hash));
2361 left_bytes -= ent_size;
2362 ent->lde_reclen = cpu_to_le16(ent_size);
2364 ent = (void *)ent + ent_size;
2367 last_ent->lde_reclen = 0;
2370 dp->ldp_flags |= LDF_EMPTY;
2371 else if (ctxt->ldc_hash == le64_to_cpu(last_ent->lde_hash))
2372 dp->ldp_flags |= LDF_COLLIDE;
2373 dp->ldp_flags = cpu_to_le32(dp->ldp_flags);
2374 dp->ldp_hash_end = cpu_to_le64(ctxt->ldc_hash);
2376 put_lmv_dir_ctxt(ctxt);
2377 OBD_FREE(ctxt, offsetof(typeof(*ctxt), ldc_stripes[stripe_count]));
2390 int lmv_read_page(struct obd_export *exp, struct md_op_data *op_data,
2391 struct md_callback *cb_op, __u64 offset,
2392 struct page **ppage)
2394 struct obd_device *obd = exp->exp_obd;
2395 struct lmv_obd *lmv = &obd->u.lmv;
2396 struct lmv_stripe_md *lsm = op_data->op_mea1;
2397 struct lmv_tgt_desc *tgt;
2401 if (unlikely(lsm != NULL)) {
2402 rc = lmv_striped_read_page(exp, op_data, cb_op, offset, ppage);
2406 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2408 RETURN(PTR_ERR(tgt));
2410 rc = md_read_page(tgt->ltd_exp, op_data, cb_op, offset, ppage);
2416 * Unlink a file/directory
2418 * Unlink a file or directory under the parent dir. The unlink request
2419 * usually will be sent to the MDT where the child is located, but if
2420 * the client does not have the child FID then request will be sent to the
2421 * MDT where the parent is located.
2423 * If the parent is a striped directory then it also needs to locate which
2424 * stripe the name of the child is located, and replace the parent FID
2425 * (@op->op_fid1) with the stripe FID. Note: if the stripe is unknown,
2426 * it will walk through all of sub-stripes until the child is being
2429 * \param[in] exp export refer to LMV
2430 * \param[in] op_data different parameters transferred beween client
2431 * MD stacks, name, namelen, FIDs etc.
2432 * op_fid1 is the parent FID, op_fid2 is the child
2434 * \param[out] request point to the request of unlink.
2436 * retval 0 if succeed
2437 * negative errno if failed.
2439 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2440 struct ptlrpc_request **request)
2442 struct obd_device *obd = exp->exp_obd;
2443 struct lmv_obd *lmv = &obd->u.lmv;
2444 struct lmv_tgt_desc *tgt = NULL;
2445 struct lmv_tgt_desc *parent_tgt = NULL;
2446 struct mdt_body *body;
2448 int stripe_index = 0;
2449 struct lmv_stripe_md *lsm = op_data->op_mea1;
2453 /* For striped dir, we need to locate the parent as well */
2455 struct lmv_tgt_desc *tmp;
2457 LASSERT(op_data->op_name != NULL &&
2458 op_data->op_namelen != 0);
2460 tmp = lmv_locate_target_for_name(lmv, lsm,
2462 op_data->op_namelen,
2466 /* return -EBADFD means unknown hash type, might
2467 * need try all sub-stripe here */
2468 if (IS_ERR(tmp) && PTR_ERR(tmp) != -EBADFD)
2469 RETURN(PTR_ERR(tmp));
2471 /* Note: both migrating dir and unknown hash dir need to
2472 * try all of sub-stripes, so we need start search the
2473 * name from stripe 0, but migrating dir is already handled
2474 * inside lmv_locate_target_for_name(), so we only check
2475 * unknown hash type directory here */
2476 if (!lmv_is_known_hash_type(lsm->lsm_md_hash_type)) {
2477 struct lmv_oinfo *oinfo;
2479 oinfo = &lsm->lsm_md_oinfo[stripe_index];
2481 op_data->op_fid1 = oinfo->lmo_fid;
2482 op_data->op_mds = oinfo->lmo_mds;
2487 /* Send unlink requests to the MDT where the child is located */
2488 if (likely(!fid_is_zero(&op_data->op_fid2)))
2489 tgt = lmv_find_target(lmv, &op_data->op_fid2);
2490 else if (lsm != NULL)
2491 tgt = lmv_get_target(lmv, op_data->op_mds, NULL);
2493 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
2496 RETURN(PTR_ERR(tgt));
2498 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2499 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2500 op_data->op_cap = cfs_curproc_cap_pack();
2503 * If child's fid is given, cancel unused locks for it if it is from
2504 * another export than parent.
2506 * LOOKUP lock for child (fid3) should also be cancelled on parent
2507 * tgt_tgt in mdc_unlink().
2509 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2512 * Cancel FULL locks on child (fid3).
2514 parent_tgt = lmv_find_target(lmv, &op_data->op_fid1);
2515 if (IS_ERR(parent_tgt))
2516 RETURN(PTR_ERR(parent_tgt));
2518 if (parent_tgt != tgt) {
2519 rc = lmv_early_cancel(exp, parent_tgt, op_data, tgt->ltd_idx,
2520 LCK_EX, MDS_INODELOCK_LOOKUP,
2521 MF_MDC_CANCEL_FID3);
2524 rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_idx, LCK_EX,
2525 MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2529 CDEBUG(D_INODE, "unlink with fid="DFID"/"DFID" -> mds #%u\n",
2530 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2), tgt->ltd_idx);
2532 rc = md_unlink(tgt->ltd_exp, op_data, request);
2533 if (rc != 0 && rc != -EREMOTE && rc != -ENOENT)
2536 /* Try next stripe if it is needed. */
2537 if (rc == -ENOENT && lsm != NULL && lmv_need_try_all_stripes(lsm)) {
2538 struct lmv_oinfo *oinfo;
2541 if (stripe_index >= lsm->lsm_md_stripe_count)
2544 oinfo = &lsm->lsm_md_oinfo[stripe_index];
2546 op_data->op_fid1 = oinfo->lmo_fid;
2547 op_data->op_mds = oinfo->lmo_mds;
2549 ptlrpc_req_finished(*request);
2552 goto try_next_stripe;
2555 body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2559 /* Not cross-ref case, just get out of here. */
2560 if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2563 CDEBUG(D_INODE, "%s: try unlink to another MDT for "DFID"\n",
2564 exp->exp_obd->obd_name, PFID(&body->mbo_fid1));
2566 /* This is a remote object, try remote MDT, Note: it may
2567 * try more than 1 time here, Considering following case
2568 * /mnt/lustre is root on MDT0, remote1 is on MDT1
2569 * 1. Initially A does not know where remote1 is, it send
2570 * unlink RPC to MDT0, MDT0 return -EREMOTE, it will
2571 * resend unlink RPC to MDT1 (retry 1st time).
2573 * 2. During the unlink RPC in flight,
2574 * client B mv /mnt/lustre/remote1 /mnt/lustre/remote2
2575 * and create new remote1, but on MDT0
2577 * 3. MDT1 get unlink RPC(from A), then do remote lock on
2578 * /mnt/lustre, then lookup get fid of remote1, and find
2579 * it is remote dir again, and replay -EREMOTE again.
2581 * 4. Then A will resend unlink RPC to MDT0. (retry 2nd times).
2583 * In theory, it might try unlimited time here, but it should
2584 * be very rare case. */
2585 op_data->op_fid2 = body->mbo_fid1;
2586 ptlrpc_req_finished(*request);
2592 static int lmv_precleanup(struct obd_device *obd)
2595 fld_client_proc_fini(&obd->u.lmv.lmv_fld);
2596 lprocfs_obd_cleanup(obd);
2597 lprocfs_free_md_stats(obd);
2602 * Get by key a value associated with a LMV device.
2604 * Dispatch request to lower-layer devices as needed.
2606 * \param[in] env execution environment for this thread
2607 * \param[in] exp export for the LMV device
2608 * \param[in] keylen length of key identifier
2609 * \param[in] key identifier of key to get value for
2610 * \param[in] vallen size of \a val
2611 * \param[out] val pointer to storage location for value
2612 * \param[in] lsm optional striping metadata of object
2614 * \retval 0 on success
2615 * \retval negative negated errno on failure
2617 static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
2618 __u32 keylen, void *key, __u32 *vallen, void *val)
2620 struct obd_device *obd;
2621 struct lmv_obd *lmv;
2625 obd = class_exp2obd(exp);
2627 CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
2628 exp->exp_handle.h_cookie);
2633 if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2636 LASSERT(*vallen == sizeof(__u32));
2637 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2638 struct lmv_tgt_desc *tgt = lmv->tgts[i];
2640 * All tgts should be connected when this gets called.
2642 if (tgt == NULL || tgt->ltd_exp == NULL)
2645 if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
2650 } else if (KEY_IS(KEY_MAX_EASIZE) ||
2651 KEY_IS(KEY_DEFAULT_EASIZE) ||
2652 KEY_IS(KEY_CONN_DATA)) {
2654 * Forwarding this request to first MDS, it should know LOV
2657 rc = obd_get_info(env, lmv->tgts[0]->ltd_exp, keylen, key,
2659 if (!rc && KEY_IS(KEY_CONN_DATA))
2660 exp->exp_connect_data = *(struct obd_connect_data *)val;
2662 } else if (KEY_IS(KEY_TGT_COUNT)) {
2663 *((int *)val) = lmv->desc.ld_tgt_count;
2667 CDEBUG(D_IOCTL, "Invalid key\n");
2672 * Asynchronously set by key a value associated with a LMV device.
2674 * Dispatch request to lower-layer devices as needed.
2676 * \param[in] env execution environment for this thread
2677 * \param[in] exp export for the LMV device
2678 * \param[in] keylen length of key identifier
2679 * \param[in] key identifier of key to store value for
2680 * \param[in] vallen size of value to store
2681 * \param[in] val pointer to data to be stored
2682 * \param[in] set optional list of related ptlrpc requests
2684 * \retval 0 on success
2685 * \retval negative negated errno on failure
2687 int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
2688 __u32 keylen, void *key, __u32 vallen, void *val,
2689 struct ptlrpc_request_set *set)
2691 struct lmv_tgt_desc *tgt = NULL;
2692 struct obd_device *obd;
2693 struct lmv_obd *lmv;
2697 obd = class_exp2obd(exp);
2699 CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
2700 exp->exp_handle.h_cookie);
2705 if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX) ||
2706 KEY_IS(KEY_DEFAULT_EASIZE)) {
2709 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2712 if (tgt == NULL || tgt->ltd_exp == NULL)
2715 err = obd_set_info_async(env, tgt->ltd_exp,
2716 keylen, key, vallen, val, set);
2727 static int lmv_unpack_md_v1(struct obd_export *exp, struct lmv_stripe_md *lsm,
2728 const struct lmv_mds_md_v1 *lmm1)
2730 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2737 lsm->lsm_md_magic = le32_to_cpu(lmm1->lmv_magic);
2738 lsm->lsm_md_stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
2739 lsm->lsm_md_master_mdt_index = le32_to_cpu(lmm1->lmv_master_mdt_index);
2740 if (OBD_FAIL_CHECK(OBD_FAIL_UNKNOWN_LMV_STRIPE))
2741 lsm->lsm_md_hash_type = LMV_HASH_TYPE_UNKNOWN;
2743 lsm->lsm_md_hash_type = le32_to_cpu(lmm1->lmv_hash_type);
2744 lsm->lsm_md_layout_version = le32_to_cpu(lmm1->lmv_layout_version);
2745 cplen = strlcpy(lsm->lsm_md_pool_name, lmm1->lmv_pool_name,
2746 sizeof(lsm->lsm_md_pool_name));
2748 if (cplen >= sizeof(lsm->lsm_md_pool_name))
2751 CDEBUG(D_INFO, "unpack lsm count %d, master %d hash_type %d"
2752 "layout_version %d\n", lsm->lsm_md_stripe_count,
2753 lsm->lsm_md_master_mdt_index, lsm->lsm_md_hash_type,
2754 lsm->lsm_md_layout_version);
2756 stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
2757 for (i = 0; i < stripe_count; i++) {
2758 fid_le_to_cpu(&lsm->lsm_md_oinfo[i].lmo_fid,
2759 &lmm1->lmv_stripe_fids[i]);
2760 rc = lmv_fld_lookup(lmv, &lsm->lsm_md_oinfo[i].lmo_fid,
2761 &lsm->lsm_md_oinfo[i].lmo_mds);
2764 CDEBUG(D_INFO, "unpack fid #%d "DFID"\n", i,
2765 PFID(&lsm->lsm_md_oinfo[i].lmo_fid));
2771 static int lmv_unpackmd(struct obd_export *exp, struct lmv_stripe_md **lsmp,
2772 const union lmv_mds_md *lmm, size_t lmm_size)
2774 struct lmv_stripe_md *lsm;
2777 bool allocated = false;
2780 LASSERT(lsmp != NULL);
2784 if (lsm != NULL && lmm == NULL) {
2786 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
2787 /* For migrating inode, the master stripe and master
2788 * object will be the same, so do not need iput, see
2789 * ll_update_lsm_md */
2790 if (!(lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION &&
2791 i == 0) && lsm->lsm_md_oinfo[i].lmo_root != NULL)
2792 iput(lsm->lsm_md_oinfo[i].lmo_root);
2794 lsm_size = lmv_stripe_md_size(lsm->lsm_md_stripe_count);
2795 OBD_FREE(lsm, lsm_size);
2800 if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_STRIPE)
2804 if (le32_to_cpu(lmm->lmv_magic) != LMV_MAGIC_V1 &&
2805 le32_to_cpu(lmm->lmv_magic) != LMV_USER_MAGIC) {
2806 CERROR("%s: invalid lmv magic %x: rc = %d\n",
2807 exp->exp_obd->obd_name, le32_to_cpu(lmm->lmv_magic),
2812 if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_V1)
2813 lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
2816 * Unpack default dirstripe(lmv_user_md) to lmv_stripe_md,
2817 * stripecount should be 0 then.
2819 lsm_size = lmv_stripe_md_size(0);
2821 lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
2823 OBD_ALLOC(lsm, lsm_size);
2830 switch (le32_to_cpu(lmm->lmv_magic)) {
2832 rc = lmv_unpack_md_v1(exp, lsm, &lmm->lmv_md_v1);
2835 CERROR("%s: unrecognized magic %x\n", exp->exp_obd->obd_name,
2836 le32_to_cpu(lmm->lmv_magic));
2841 if (rc != 0 && allocated) {
2842 OBD_FREE(lsm, lsm_size);
2849 void lmv_free_memmd(struct lmv_stripe_md *lsm)
2851 lmv_unpackmd(NULL, &lsm, NULL, 0);
2853 EXPORT_SYMBOL(lmv_free_memmd);
2855 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
2856 union ldlm_policy_data *policy,
2857 enum ldlm_mode mode, enum ldlm_cancel_flags flags,
2860 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2865 LASSERT(fid != NULL);
2867 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2868 struct lmv_tgt_desc *tgt = lmv->tgts[i];
2871 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
2874 err = md_cancel_unused(tgt->ltd_exp, fid, policy, mode, flags,
2882 static int lmv_set_lock_data(struct obd_export *exp,
2883 const struct lustre_handle *lockh,
2884 void *data, __u64 *bits)
2886 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2887 struct lmv_tgt_desc *tgt = lmv->tgts[0];
2891 if (tgt == NULL || tgt->ltd_exp == NULL)
2893 rc = md_set_lock_data(tgt->ltd_exp, lockh, data, bits);
2897 enum ldlm_mode lmv_lock_match(struct obd_export *exp, __u64 flags,
2898 const struct lu_fid *fid, enum ldlm_type type,
2899 union ldlm_policy_data *policy,
2900 enum ldlm_mode mode, struct lustre_handle *lockh)
2902 struct obd_device *obd = exp->exp_obd;
2903 struct lmv_obd *lmv = &obd->u.lmv;
2909 CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
2912 * With DNE every object can have two locks in different namespaces:
2913 * lookup lock in space of MDT storing direntry and update/open lock in
2914 * space of MDT storing inode. Try the MDT that the FID maps to first,
2915 * since this can be easily found, and only try others if that fails.
2917 for (i = 0, tgt = lmv_find_target_index(lmv, fid);
2918 i < lmv->desc.ld_tgt_count;
2919 i++, tgt = (tgt + 1) % lmv->desc.ld_tgt_count) {
2921 CDEBUG(D_HA, "%s: "DFID" is inaccessible: rc = %d\n",
2922 obd->obd_name, PFID(fid), tgt);
2926 if (lmv->tgts[tgt] == NULL ||
2927 lmv->tgts[tgt]->ltd_exp == NULL ||
2928 lmv->tgts[tgt]->ltd_active == 0)
2931 rc = md_lock_match(lmv->tgts[tgt]->ltd_exp, flags, fid,
2932 type, policy, mode, lockh);
2940 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
2941 struct obd_export *dt_exp, struct obd_export *md_exp,
2942 struct lustre_md *md)
2944 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2945 struct lmv_tgt_desc *tgt = lmv->tgts[0];
2947 if (tgt == NULL || tgt->ltd_exp == NULL)
2950 return md_get_lustre_md(lmv->tgts[0]->ltd_exp, req, dt_exp, md_exp, md);
2953 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
2955 struct obd_device *obd = exp->exp_obd;
2956 struct lmv_obd *lmv = &obd->u.lmv;
2957 struct lmv_tgt_desc *tgt = lmv->tgts[0];
2960 if (md->lmv != NULL) {
2961 lmv_free_memmd(md->lmv);
2964 if (tgt == NULL || tgt->ltd_exp == NULL)
2966 RETURN(md_free_lustre_md(lmv->tgts[0]->ltd_exp, md));
2969 int lmv_set_open_replay_data(struct obd_export *exp,
2970 struct obd_client_handle *och,
2971 struct lookup_intent *it)
2973 struct obd_device *obd = exp->exp_obd;
2974 struct lmv_obd *lmv = &obd->u.lmv;
2975 struct lmv_tgt_desc *tgt;
2978 tgt = lmv_find_target(lmv, &och->och_fid);
2980 RETURN(PTR_ERR(tgt));
2982 RETURN(md_set_open_replay_data(tgt->ltd_exp, och, it));
2985 int lmv_clear_open_replay_data(struct obd_export *exp,
2986 struct obd_client_handle *och)
2988 struct obd_device *obd = exp->exp_obd;
2989 struct lmv_obd *lmv = &obd->u.lmv;
2990 struct lmv_tgt_desc *tgt;
2993 tgt = lmv_find_target(lmv, &och->och_fid);
2995 RETURN(PTR_ERR(tgt));
2997 RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
3000 int lmv_intent_getattr_async(struct obd_export *exp,
3001 struct md_enqueue_info *minfo)
3003 struct md_op_data *op_data = &minfo->mi_data;
3004 struct obd_device *obd = exp->exp_obd;
3005 struct lmv_obd *lmv = &obd->u.lmv;
3006 struct lmv_tgt_desc *tgt = NULL;
3010 if (!fid_is_sane(&op_data->op_fid2))
3013 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
3015 RETURN(PTR_ERR(tgt));
3018 * no special handle for remote dir, which needs to fetch both LOOKUP
3019 * lock on parent, and then UPDATE lock on child MDT, which makes all
3020 * complicated because this is done async. So only LOOKUP lock is
3021 * fetched for remote dir, but considering remote dir is rare case,
3022 * and not supporting it in statahead won't cause any issue, just leave
3026 rc = md_intent_getattr_async(tgt->ltd_exp, minfo);
3030 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
3031 struct lu_fid *fid, __u64 *bits)
3033 struct obd_device *obd = exp->exp_obd;
3034 struct lmv_obd *lmv = &obd->u.lmv;
3035 struct lmv_tgt_desc *tgt;
3039 tgt = lmv_find_target(lmv, fid);
3041 RETURN(PTR_ERR(tgt));
3043 rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
3047 int lmv_get_fid_from_lsm(struct obd_export *exp,
3048 const struct lmv_stripe_md *lsm,
3049 const char *name, int namelen, struct lu_fid *fid)
3051 const struct lmv_oinfo *oinfo;
3053 LASSERT(lsm != NULL);
3054 oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
3056 return PTR_ERR(oinfo);
3058 *fid = oinfo->lmo_fid;
3064 * For lmv, only need to send request to master MDT, and the master MDT will
3065 * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
3066 * we directly fetch data from the slave MDTs.
3068 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
3069 struct obd_quotactl *oqctl)
3071 struct obd_device *obd = class_exp2obd(exp);
3072 struct lmv_obd *lmv = &obd->u.lmv;
3073 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3076 __u64 curspace, curinodes;
3080 tgt->ltd_exp == NULL ||
3082 lmv->desc.ld_tgt_count == 0) {
3083 CERROR("master lmv inactive\n");
3087 if (oqctl->qc_cmd != Q_GETOQUOTA) {
3088 rc = obd_quotactl(tgt->ltd_exp, oqctl);
3092 curspace = curinodes = 0;
3093 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3097 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
3100 err = obd_quotactl(tgt->ltd_exp, oqctl);
3102 CERROR("getquota on mdt %d failed. %d\n", i, err);
3106 curspace += oqctl->qc_dqblk.dqb_curspace;
3107 curinodes += oqctl->qc_dqblk.dqb_curinodes;
3110 oqctl->qc_dqblk.dqb_curspace = curspace;
3111 oqctl->qc_dqblk.dqb_curinodes = curinodes;
3116 static int lmv_merge_attr(struct obd_export *exp,
3117 const struct lmv_stripe_md *lsm,
3118 struct cl_attr *attr,
3119 ldlm_blocking_callback cb_blocking)
3124 rc = lmv_revalidate_slaves(exp, lsm, cb_blocking, 0);
3128 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
3129 struct inode *inode = lsm->lsm_md_oinfo[i].lmo_root;
3131 CDEBUG(D_INFO, ""DFID" size %llu, blocks %llu nlink %u,"
3132 " atime %lu ctime %lu, mtime %lu.\n",
3133 PFID(&lsm->lsm_md_oinfo[i].lmo_fid),
3134 i_size_read(inode), (unsigned long long)inode->i_blocks,
3135 inode->i_nlink, LTIME_S(inode->i_atime),
3136 LTIME_S(inode->i_ctime), LTIME_S(inode->i_mtime));
3138 /* for slave stripe, it needs to subtract nlink for . and .. */
3140 attr->cat_nlink += inode->i_nlink - 2;
3142 attr->cat_nlink = inode->i_nlink;
3144 attr->cat_size += i_size_read(inode);
3145 attr->cat_blocks += inode->i_blocks;
3147 if (attr->cat_atime < LTIME_S(inode->i_atime))
3148 attr->cat_atime = LTIME_S(inode->i_atime);
3150 if (attr->cat_ctime < LTIME_S(inode->i_ctime))
3151 attr->cat_ctime = LTIME_S(inode->i_ctime);
3153 if (attr->cat_mtime < LTIME_S(inode->i_mtime))
3154 attr->cat_mtime = LTIME_S(inode->i_mtime);
3159 struct obd_ops lmv_obd_ops = {
3160 .o_owner = THIS_MODULE,
3161 .o_setup = lmv_setup,
3162 .o_cleanup = lmv_cleanup,
3163 .o_precleanup = lmv_precleanup,
3164 .o_process_config = lmv_process_config,
3165 .o_connect = lmv_connect,
3166 .o_disconnect = lmv_disconnect,
3167 .o_statfs = lmv_statfs,
3168 .o_get_info = lmv_get_info,
3169 .o_set_info_async = lmv_set_info_async,
3170 .o_notify = lmv_notify,
3171 .o_get_uuid = lmv_get_uuid,
3172 .o_iocontrol = lmv_iocontrol,
3173 .o_quotactl = lmv_quotactl
3176 struct md_ops lmv_md_ops = {
3177 .m_get_root = lmv_get_root,
3178 .m_null_inode = lmv_null_inode,
3179 .m_close = lmv_close,
3180 .m_create = lmv_create,
3181 .m_enqueue = lmv_enqueue,
3182 .m_getattr = lmv_getattr,
3183 .m_getxattr = lmv_getxattr,
3184 .m_getattr_name = lmv_getattr_name,
3185 .m_intent_lock = lmv_intent_lock,
3187 .m_rename = lmv_rename,
3188 .m_setattr = lmv_setattr,
3189 .m_setxattr = lmv_setxattr,
3190 .m_fsync = lmv_fsync,
3191 .m_read_page = lmv_read_page,
3192 .m_unlink = lmv_unlink,
3193 .m_init_ea_size = lmv_init_ea_size,
3194 .m_cancel_unused = lmv_cancel_unused,
3195 .m_set_lock_data = lmv_set_lock_data,
3196 .m_lock_match = lmv_lock_match,
3197 .m_get_lustre_md = lmv_get_lustre_md,
3198 .m_free_lustre_md = lmv_free_lustre_md,
3199 .m_merge_attr = lmv_merge_attr,
3200 .m_set_open_replay_data = lmv_set_open_replay_data,
3201 .m_clear_open_replay_data = lmv_clear_open_replay_data,
3202 .m_intent_getattr_async = lmv_intent_getattr_async,
3203 .m_revalidate_lock = lmv_revalidate_lock,
3204 .m_get_fid_from_lsm = lmv_get_fid_from_lsm,
3205 .m_unpackmd = lmv_unpackmd,
3208 static int __init lmv_init(void)
3210 return class_register_type(&lmv_obd_ops, &lmv_md_ops, true, NULL,
3211 LUSTRE_LMV_NAME, NULL);
3214 static void __exit lmv_exit(void)
3216 class_unregister_type(LUSTRE_LMV_NAME);
3219 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3220 MODULE_DESCRIPTION("Lustre Logical Metadata Volume");
3221 MODULE_VERSION(LUSTRE_VERSION_STRING);
3222 MODULE_LICENSE("GPL");
3224 module_init(lmv_init);
3225 module_exit(lmv_exit);