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 LMV 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) + 1 +
687 strlen(gf->gf_u.gf_path) + 1 > 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 = {
827 .kcd_magic = KKUC_CT_DATA_MAGIC,
828 .kcd_uuid = lmv->cluuid,
829 .kcd_archive = lk->lk_data
834 filp = fget(lk->lk_wfd);
838 rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group,
843 /* All or nothing: try to register to all MDS.
844 * In case of failure, unregister from previous MDS,
845 * except if it because of inactive target. */
846 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
847 struct lmv_tgt_desc *tgt = lmv->tgts[i];
849 if (tgt == NULL || tgt->ltd_exp == NULL)
852 err = obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
854 if (tgt->ltd_active) {
855 /* permanent error */
856 CERROR("%s: iocontrol MDC %s on MDT"
857 " idx %d cmd %x: err = %d\n",
858 lmv2obd_dev(lmv)->obd_name,
859 tgt->ltd_uuid.uuid, i, cmd, err);
861 lk->lk_flags |= LK_FLG_STOP;
862 /* unregister from previous MDS */
863 for (j = 0; j < i; j++) {
865 if (tgt == NULL || tgt->ltd_exp == NULL)
867 obd_iocontrol(cmd, tgt->ltd_exp, len,
870 GOTO(err_kkuc_rem, rc);
872 /* else: transient error.
873 * kuc will register to the missing MDT
881 /* no registration done: return error */
882 GOTO(err_kkuc_rem, rc = -ENOTCONN);
887 libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group);
897 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
898 int len, void *karg, void __user *uarg)
900 struct obd_device *obddev = class_exp2obd(exp);
901 struct lmv_obd *lmv = &obddev->u.lmv;
902 struct lmv_tgt_desc *tgt = NULL;
906 __u32 count = lmv->desc.ld_tgt_count;
913 case IOC_OBD_STATFS: {
914 struct obd_ioctl_data *data = karg;
915 struct obd_device *mdc_obd;
916 struct obd_statfs stat_buf = {0};
919 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
920 if ((index >= count))
923 tgt = lmv->tgts[index];
924 if (tgt == NULL || !tgt->ltd_active)
927 mdc_obd = class_exp2obd(tgt->ltd_exp);
932 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
933 min((int) data->ioc_plen2,
934 (int) sizeof(struct obd_uuid))))
937 rc = obd_statfs(NULL, tgt->ltd_exp, &stat_buf,
938 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
942 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
943 min((int) data->ioc_plen1,
944 (int) sizeof(stat_buf))))
948 case OBD_IOC_QUOTACTL: {
949 struct if_quotactl *qctl = karg;
950 struct obd_quotactl *oqctl;
952 if (qctl->qc_valid == QC_MDTIDX) {
953 if (count <= qctl->qc_idx)
956 tgt = lmv->tgts[qctl->qc_idx];
957 if (tgt == NULL || tgt->ltd_exp == NULL)
959 } else if (qctl->qc_valid == QC_UUID) {
960 for (i = 0; i < count; i++) {
964 if (!obd_uuid_equals(&tgt->ltd_uuid,
968 if (tgt->ltd_exp == NULL)
980 LASSERT(tgt != NULL && tgt->ltd_exp != NULL);
981 OBD_ALLOC_PTR(oqctl);
985 QCTL_COPY(oqctl, qctl);
986 rc = obd_quotactl(tgt->ltd_exp, oqctl);
988 QCTL_COPY(qctl, oqctl);
989 qctl->qc_valid = QC_MDTIDX;
990 qctl->obd_uuid = tgt->ltd_uuid;
995 case LL_IOC_GET_CONNECT_FLAGS: {
997 if (tgt == NULL || tgt->ltd_exp == NULL)
999 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1002 case LL_IOC_FID2MDTIDX: {
1003 struct lu_fid *fid = karg;
1006 rc = lmv_fld_lookup(lmv, fid, &mdt_index);
1010 /* Note: this is from llite(see ll_dir_ioctl()), @uarg does not
1011 * point to user space memory for FID2MDTIDX. */
1012 *(__u32 *)uarg = mdt_index;
1015 case OBD_IOC_FID2PATH: {
1016 rc = lmv_fid2path(exp, len, karg, uarg);
1019 case LL_IOC_HSM_STATE_GET:
1020 case LL_IOC_HSM_STATE_SET:
1021 case LL_IOC_HSM_ACTION: {
1022 struct md_op_data *op_data = karg;
1024 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1026 RETURN(PTR_ERR(tgt));
1028 if (tgt->ltd_exp == NULL)
1031 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1034 case LL_IOC_HSM_PROGRESS: {
1035 const struct hsm_progress_kernel *hpk = karg;
1037 tgt = lmv_find_target(lmv, &hpk->hpk_fid);
1039 RETURN(PTR_ERR(tgt));
1040 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1043 case LL_IOC_HSM_REQUEST: {
1044 struct hsm_user_request *hur = karg;
1045 unsigned int reqcount = hur->hur_request.hr_itemcount;
1050 /* if the request is about a single fid
1051 * or if there is a single MDS, no need to split
1053 if (reqcount == 1 || count == 1) {
1054 tgt = lmv_find_target(lmv,
1055 &hur->hur_user_item[0].hui_fid);
1057 RETURN(PTR_ERR(tgt));
1058 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1060 /* split fid list to their respective MDS */
1061 for (i = 0; i < count; i++) {
1064 struct hsm_user_request *req;
1067 if (tgt == NULL || tgt->ltd_exp == NULL)
1070 nr = lmv_hsm_req_count(lmv, hur, tgt);
1073 if (nr == 0) /* nothing for this MDS */
1076 /* build a request with fids for this MDS */
1077 reqlen = offsetof(typeof(*hur),
1079 + hur->hur_request.hr_data_len;
1080 OBD_ALLOC_LARGE(req, reqlen);
1083 rc1 = lmv_hsm_req_build(lmv, hur, tgt, req);
1085 GOTO(hsm_req_err, rc1);
1086 rc1 = obd_iocontrol(cmd, tgt->ltd_exp, reqlen,
1089 if (rc1 != 0 && rc == 0)
1091 OBD_FREE_LARGE(req, reqlen);
1096 case LL_IOC_LOV_SWAP_LAYOUTS: {
1097 struct md_op_data *op_data = karg;
1098 struct lmv_tgt_desc *tgt1, *tgt2;
1100 tgt1 = lmv_find_target(lmv, &op_data->op_fid1);
1102 RETURN(PTR_ERR(tgt1));
1104 tgt2 = lmv_find_target(lmv, &op_data->op_fid2);
1106 RETURN(PTR_ERR(tgt2));
1108 if ((tgt1->ltd_exp == NULL) || (tgt2->ltd_exp == NULL))
1111 /* only files on same MDT can have their layouts swapped */
1112 if (tgt1->ltd_idx != tgt2->ltd_idx)
1115 rc = obd_iocontrol(cmd, tgt1->ltd_exp, len, karg, uarg);
1118 case LL_IOC_HSM_CT_START: {
1119 struct lustre_kernelcomm *lk = karg;
1120 if (lk->lk_flags & LK_FLG_STOP)
1121 rc = lmv_hsm_ct_unregister(lmv, cmd, len, lk, uarg);
1123 rc = lmv_hsm_ct_register(lmv, cmd, len, lk, uarg);
1127 for (i = 0; i < count; i++) {
1128 struct obd_device *mdc_obd;
1132 if (tgt == NULL || tgt->ltd_exp == NULL)
1134 /* ll_umount_begin() sets force flag but for lmv, not
1135 * mdc. Let's pass it through */
1136 mdc_obd = class_exp2obd(tgt->ltd_exp);
1137 mdc_obd->obd_force = obddev->obd_force;
1138 err = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1140 if (tgt->ltd_active) {
1141 CERROR("error: iocontrol MDC %s on MDT"
1142 " idx %d cmd %x: err = %d\n",
1143 tgt->ltd_uuid.uuid, i, cmd, err);
1157 * This is _inode_ placement policy function (not name).
1159 static int lmv_placement_policy(struct obd_device *obd,
1160 struct md_op_data *op_data, u32 *mds)
1162 struct lmv_obd *lmv = &obd->u.lmv;
1163 struct lmv_user_md *lum;
1167 LASSERT(mds != NULL);
1169 if (lmv->desc.ld_tgt_count == 1) {
1174 lum = op_data->op_data;
1176 * 1. See if the stripe offset is specified by lum.
1177 * 2. Then check if there is default stripe offset.
1178 * 3. Finally choose MDS by name hash if the parent
1179 * is striped directory. (see lmv_locate_mds()). */
1180 if (op_data->op_cli_flags & CLI_SET_MEA && lum != NULL &&
1181 le32_to_cpu(lum->lum_stripe_offset) != (__u32)-1) {
1182 *mds = le32_to_cpu(lum->lum_stripe_offset);
1183 } else if (op_data->op_default_stripe_offset != (__u32)-1) {
1184 *mds = op_data->op_default_stripe_offset;
1185 op_data->op_mds = *mds;
1186 /* Correct the stripe offset in lum */
1188 lum->lum_stripe_offset = cpu_to_le32(*mds);
1190 *mds = op_data->op_mds;
1196 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds)
1198 struct lmv_tgt_desc *tgt;
1202 tgt = lmv_get_target(lmv, mds, NULL);
1204 RETURN(PTR_ERR(tgt));
1207 * New seq alloc and FLD setup should be atomic. Otherwise we may find
1208 * on server that seq in new allocated fid is not yet known.
1210 mutex_lock(&tgt->ltd_fid_mutex);
1212 if (tgt->ltd_active == 0 || tgt->ltd_exp == NULL)
1213 GOTO(out, rc = -ENODEV);
1216 * Asking underlying tgt layer to allocate new fid.
1218 rc = obd_fid_alloc(NULL, tgt->ltd_exp, fid, NULL);
1220 LASSERT(fid_is_sane(fid));
1226 mutex_unlock(&tgt->ltd_fid_mutex);
1230 int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
1231 struct lu_fid *fid, struct md_op_data *op_data)
1233 struct obd_device *obd = class_exp2obd(exp);
1234 struct lmv_obd *lmv = &obd->u.lmv;
1239 LASSERT(op_data != NULL);
1240 LASSERT(fid != NULL);
1242 rc = lmv_placement_policy(obd, op_data, &mds);
1244 CERROR("Can't get target for allocating fid, "
1249 rc = __lmv_fid_alloc(lmv, fid, mds);
1251 CERROR("Can't alloc new fid, rc %d\n", rc);
1258 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1260 struct lmv_obd *lmv = &obd->u.lmv;
1261 struct lmv_desc *desc;
1265 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1266 CERROR("LMV setup requires a descriptor\n");
1270 desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1271 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1272 CERROR("Lmv descriptor size wrong: %d > %d\n",
1273 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1277 lmv->tgts_size = 32U;
1278 OBD_ALLOC(lmv->tgts, sizeof(*lmv->tgts) * lmv->tgts_size);
1279 if (lmv->tgts == NULL)
1282 obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1283 lmv->desc.ld_tgt_count = 0;
1284 lmv->desc.ld_active_tgt_count = 0;
1285 lmv->max_def_easize = 0;
1286 lmv->max_easize = 0;
1288 spin_lock_init(&lmv->lmv_lock);
1289 mutex_init(&lmv->lmv_init_mutex);
1291 #ifdef CONFIG_PROC_FS
1292 obd->obd_vars = lprocfs_lmv_obd_vars;
1293 lprocfs_obd_setup(obd, true);
1294 lprocfs_alloc_md_stats(obd, 0);
1295 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
1296 0444, &lmv_proc_target_fops, obd);
1298 CWARN("%s: error adding LMV target_obd file: rc = %d\n",
1301 rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1302 LUSTRE_CLI_FLD_HASH_DHT);
1304 CERROR("Can't init FLD, err %d\n", rc);
1314 static int lmv_cleanup(struct obd_device *obd)
1316 struct lmv_obd *lmv = &obd->u.lmv;
1319 fld_client_fini(&lmv->lmv_fld);
1320 if (lmv->tgts != NULL) {
1322 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1323 if (lmv->tgts[i] == NULL)
1325 lmv_del_target(lmv, i);
1327 OBD_FREE(lmv->tgts, sizeof(*lmv->tgts) * lmv->tgts_size);
1333 static int lmv_process_config(struct obd_device *obd, size_t len, void *buf)
1335 struct lustre_cfg *lcfg = buf;
1336 struct obd_uuid obd_uuid;
1342 switch (lcfg->lcfg_command) {
1344 /* modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID
1345 * 2:0 3:1 4:lustre-MDT0000-mdc_UUID */
1346 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
1347 GOTO(out, rc = -EINVAL);
1349 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
1351 if (sscanf(lustre_cfg_buf(lcfg, 2), "%u", &index) != 1)
1352 GOTO(out, rc = -EINVAL);
1353 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
1354 GOTO(out, rc = -EINVAL);
1355 rc = lmv_add_target(obd, &obd_uuid, index, gen);
1358 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1359 GOTO(out, rc = -EINVAL);
1365 static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
1366 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1368 struct obd_device *obd = class_exp2obd(exp);
1369 struct lmv_obd *lmv = &obd->u.lmv;
1370 struct obd_statfs *temp;
1375 OBD_ALLOC(temp, sizeof(*temp));
1379 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1380 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1383 rc = obd_statfs(env, lmv->tgts[i]->ltd_exp, temp,
1386 CERROR("can't stat MDS #%d (%s), error %d\n", i,
1387 lmv->tgts[i]->ltd_exp->exp_obd->obd_name,
1389 GOTO(out_free_temp, rc);
1394 /* If the statfs is from mount, it will needs
1395 * retrieve necessary information from MDT0.
1396 * i.e. mount does not need the merged osfs
1398 * And also clients can be mounted as long as
1399 * MDT0 is in service*/
1400 if (flags & OBD_STATFS_FOR_MDT0)
1401 GOTO(out_free_temp, rc);
1403 osfs->os_bavail += temp->os_bavail;
1404 osfs->os_blocks += temp->os_blocks;
1405 osfs->os_ffree += temp->os_ffree;
1406 osfs->os_files += temp->os_files;
1412 OBD_FREE(temp, sizeof(*temp));
1416 static int lmv_get_root(struct obd_export *exp, const char *fileset,
1419 struct obd_device *obd = exp->exp_obd;
1420 struct lmv_obd *lmv = &obd->u.lmv;
1424 rc = md_get_root(lmv->tgts[0]->ltd_exp, fileset, fid);
1428 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1429 u64 valid, const char *name,
1430 const char *input, int input_size, int output_size,
1431 int flags, struct ptlrpc_request **request)
1433 struct obd_device *obd = exp->exp_obd;
1434 struct lmv_obd *lmv = &obd->u.lmv;
1435 struct lmv_tgt_desc *tgt;
1439 tgt = lmv_find_target(lmv, fid);
1441 RETURN(PTR_ERR(tgt));
1443 rc = md_getxattr(tgt->ltd_exp, fid, valid, name, input,
1444 input_size, output_size, flags, request);
1449 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1450 u64 valid, const char *name,
1451 const char *input, int input_size, int output_size,
1452 int flags, __u32 suppgid,
1453 struct ptlrpc_request **request)
1455 struct obd_device *obd = exp->exp_obd;
1456 struct lmv_obd *lmv = &obd->u.lmv;
1457 struct lmv_tgt_desc *tgt;
1461 tgt = lmv_find_target(lmv, fid);
1463 RETURN(PTR_ERR(tgt));
1465 rc = md_setxattr(tgt->ltd_exp, fid, valid, name, input,
1466 input_size, output_size, flags, suppgid,
1472 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1473 struct ptlrpc_request **request)
1475 struct obd_device *obd = exp->exp_obd;
1476 struct lmv_obd *lmv = &obd->u.lmv;
1477 struct lmv_tgt_desc *tgt;
1481 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1483 RETURN(PTR_ERR(tgt));
1485 if (op_data->op_flags & MF_GET_MDT_IDX) {
1486 op_data->op_mds = tgt->ltd_idx;
1490 rc = md_getattr(tgt->ltd_exp, op_data, request);
1495 static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
1497 struct obd_device *obd = exp->exp_obd;
1498 struct lmv_obd *lmv = &obd->u.lmv;
1502 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1505 * With DNE every object can have two locks in different namespaces:
1506 * lookup lock in space of MDT storing direntry and update/open lock in
1507 * space of MDT storing inode.
1509 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1510 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1512 md_null_inode(lmv->tgts[i]->ltd_exp, fid);
1518 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1519 struct md_open_data *mod, struct ptlrpc_request **request)
1521 struct obd_device *obd = exp->exp_obd;
1522 struct lmv_obd *lmv = &obd->u.lmv;
1523 struct lmv_tgt_desc *tgt;
1527 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1529 RETURN(PTR_ERR(tgt));
1531 CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1532 rc = md_close(tgt->ltd_exp, op_data, mod, request);
1537 * Choosing the MDT by name or FID in @op_data.
1538 * For non-striped directory, it will locate MDT by fid.
1539 * For striped-directory, it will locate MDT by name. And also
1540 * it will reset op_fid1 with the FID of the choosen stripe.
1542 struct lmv_tgt_desc *
1543 lmv_locate_target_for_name(struct lmv_obd *lmv, struct lmv_stripe_md *lsm,
1544 const char *name, int namelen, struct lu_fid *fid,
1547 struct lmv_tgt_desc *tgt;
1548 const struct lmv_oinfo *oinfo;
1550 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_NAME_HASH)) {
1551 if (cfs_fail_val >= lsm->lsm_md_stripe_count)
1552 RETURN(ERR_PTR(-EBADF));
1553 oinfo = &lsm->lsm_md_oinfo[cfs_fail_val];
1555 oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
1557 RETURN(ERR_CAST(oinfo));
1561 *fid = oinfo->lmo_fid;
1563 *mds = oinfo->lmo_mds;
1565 tgt = lmv_get_target(lmv, oinfo->lmo_mds, NULL);
1567 CDEBUG(D_INFO, "locate on mds %u "DFID"\n", oinfo->lmo_mds,
1568 PFID(&oinfo->lmo_fid));
1573 * Locate mds by fid or name
1575 * For striped directory (lsm != NULL), it will locate the stripe
1576 * by name hash (see lsm_name_to_stripe_info()). Note: if the hash_type
1577 * is unknown, it will return -EBADFD, and lmv_intent_lookup might need
1578 * walk through all of stripes to locate the entry.
1580 * For normal direcotry, it will locate MDS by FID directly.
1581 * \param[in] lmv LMV device
1582 * \param[in] op_data client MD stack parameters, name, namelen
1584 * \param[in] fid object FID used to locate MDS.
1586 * retval pointer to the lmv_tgt_desc if succeed.
1587 * ERR_PTR(errno) if failed.
1589 struct lmv_tgt_desc*
1590 lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1593 struct lmv_stripe_md *lsm = op_data->op_mea1;
1594 struct lmv_tgt_desc *tgt;
1596 /* During creating VOLATILE file, it should honor the mdt
1597 * index if the file under striped dir is being restored, see
1599 if (op_data->op_bias & MDS_CREATE_VOLATILE &&
1600 (int)op_data->op_mds != -1) {
1602 tgt = lmv_get_target(lmv, op_data->op_mds, NULL);
1607 /* refill the right parent fid */
1608 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1609 struct lmv_oinfo *oinfo;
1611 oinfo = &lsm->lsm_md_oinfo[i];
1612 if (oinfo->lmo_mds == op_data->op_mds) {
1613 *fid = oinfo->lmo_fid;
1618 if (i == lsm->lsm_md_stripe_count)
1619 *fid = lsm->lsm_md_oinfo[0].lmo_fid;
1625 if (lsm == NULL || op_data->op_namelen == 0) {
1626 tgt = lmv_find_target(lmv, fid);
1630 op_data->op_mds = tgt->ltd_idx;
1634 return lmv_locate_target_for_name(lmv, lsm, op_data->op_name,
1635 op_data->op_namelen, fid,
1639 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1640 const void *data, size_t datalen, umode_t mode, uid_t uid,
1641 gid_t gid, cfs_cap_t cap_effective, __u64 rdev,
1642 struct ptlrpc_request **request)
1644 struct obd_device *obd = exp->exp_obd;
1645 struct lmv_obd *lmv = &obd->u.lmv;
1646 struct lmv_tgt_desc *tgt;
1650 if (!lmv->desc.ld_active_tgt_count)
1653 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1655 RETURN(PTR_ERR(tgt));
1657 CDEBUG(D_INODE, "CREATE name '%.*s' on "DFID" -> mds #%x\n",
1658 (int)op_data->op_namelen, op_data->op_name,
1659 PFID(&op_data->op_fid1), op_data->op_mds);
1661 rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
1664 if (exp_connect_flags(exp) & OBD_CONNECT_DIR_STRIPE) {
1665 /* Send the create request to the MDT where the object
1666 * will be located */
1667 tgt = lmv_find_target(lmv, &op_data->op_fid2);
1669 RETURN(PTR_ERR(tgt));
1671 op_data->op_mds = tgt->ltd_idx;
1673 CDEBUG(D_CONFIG, "Server doesn't support striped dirs\n");
1676 CDEBUG(D_INODE, "CREATE obj "DFID" -> mds #%x\n",
1677 PFID(&op_data->op_fid2), op_data->op_mds);
1679 op_data->op_flags |= MF_MDC_CANCEL_FID1;
1680 rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1681 cap_effective, rdev, request);
1683 if (*request == NULL)
1685 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1691 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1692 const union ldlm_policy_data *policy, struct md_op_data *op_data,
1693 struct lustre_handle *lockh, __u64 extra_lock_flags)
1695 struct obd_device *obd = exp->exp_obd;
1696 struct lmv_obd *lmv = &obd->u.lmv;
1697 struct lmv_tgt_desc *tgt;
1701 CDEBUG(D_INODE, "ENQUEUE on "DFID"\n", PFID(&op_data->op_fid1));
1703 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1705 RETURN(PTR_ERR(tgt));
1707 CDEBUG(D_INODE, "ENQUEUE on "DFID" -> mds #%u\n",
1708 PFID(&op_data->op_fid1), tgt->ltd_idx);
1710 rc = md_enqueue(tgt->ltd_exp, einfo, policy, op_data, lockh,
1717 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1718 struct ptlrpc_request **preq)
1720 struct ptlrpc_request *req = NULL;
1721 struct obd_device *obd = exp->exp_obd;
1722 struct lmv_obd *lmv = &obd->u.lmv;
1723 struct lmv_tgt_desc *tgt;
1724 struct mdt_body *body;
1728 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1730 RETURN(PTR_ERR(tgt));
1732 CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" -> mds #%d\n",
1733 (int)op_data->op_namelen, op_data->op_name,
1734 PFID(&op_data->op_fid1), tgt->ltd_idx);
1736 rc = md_getattr_name(tgt->ltd_exp, op_data, preq);
1740 body = req_capsule_server_get(&(*preq)->rq_pill, &RMF_MDT_BODY);
1741 LASSERT(body != NULL);
1743 if (body->mbo_valid & OBD_MD_MDS) {
1744 struct lu_fid rid = body->mbo_fid1;
1745 CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1748 tgt = lmv_find_target(lmv, &rid);
1750 ptlrpc_req_finished(*preq);
1752 RETURN(PTR_ERR(tgt));
1755 op_data->op_fid1 = rid;
1756 op_data->op_valid |= OBD_MD_FLCROSSREF;
1757 op_data->op_namelen = 0;
1758 op_data->op_name = NULL;
1759 rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
1760 ptlrpc_req_finished(*preq);
1767 #define md_op_data_fid(op_data, fl) \
1768 (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1769 fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1770 fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1771 fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1774 static int lmv_early_cancel(struct obd_export *exp, struct lmv_tgt_desc *tgt,
1775 struct md_op_data *op_data, __u32 op_tgt,
1776 enum ldlm_mode mode, int bits, int flag)
1778 struct lu_fid *fid = md_op_data_fid(op_data, flag);
1779 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
1780 union ldlm_policy_data policy = { { 0 } };
1784 if (!fid_is_sane(fid))
1788 tgt = lmv_find_target(lmv, fid);
1790 RETURN(PTR_ERR(tgt));
1793 if (tgt->ltd_idx != op_tgt) {
1794 CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1795 policy.l_inodebits.bits = bits;
1796 rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1797 mode, LCF_ASYNC, NULL);
1800 "EARLY_CANCEL skip operation target %d on "DFID"\n",
1802 op_data->op_flags |= flag;
1810 * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1813 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1814 struct ptlrpc_request **request)
1816 struct obd_device *obd = exp->exp_obd;
1817 struct lmv_obd *lmv = &obd->u.lmv;
1818 struct lmv_tgt_desc *tgt;
1822 LASSERT(op_data->op_namelen != 0);
1824 CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
1825 PFID(&op_data->op_fid2), (int)op_data->op_namelen,
1826 op_data->op_name, PFID(&op_data->op_fid1));
1828 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
1829 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
1830 op_data->op_cap = cfs_curproc_cap_pack();
1831 if (op_data->op_mea2 != NULL) {
1832 struct lmv_stripe_md *lsm = op_data->op_mea2;
1833 const struct lmv_oinfo *oinfo;
1835 oinfo = lsm_name_to_stripe_info(lsm, op_data->op_name,
1836 op_data->op_namelen);
1838 RETURN(PTR_ERR(oinfo));
1840 op_data->op_fid2 = oinfo->lmo_fid;
1843 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
1845 RETURN(PTR_ERR(tgt));
1848 * Cancel UPDATE lock on child (fid1).
1850 op_data->op_flags |= MF_MDC_CANCEL_FID2;
1851 rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_idx, LCK_EX,
1852 MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
1856 rc = md_link(tgt->ltd_exp, op_data, request);
1861 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
1862 const char *old, size_t oldlen,
1863 const char *new, size_t newlen,
1864 struct ptlrpc_request **request)
1866 struct obd_device *obd = exp->exp_obd;
1867 struct lmv_obd *lmv = &obd->u.lmv;
1868 struct lmv_tgt_desc *src_tgt;
1869 struct lmv_tgt_desc *tgt_tgt;
1870 struct obd_export *target_exp;
1871 struct mdt_body *body;
1875 LASSERT(oldlen != 0);
1877 CDEBUG(D_INODE, "RENAME %.*s in "DFID":%d to %.*s in "DFID":%d\n",
1878 (int)oldlen, old, PFID(&op_data->op_fid1),
1879 op_data->op_mea1 ? op_data->op_mea1->lsm_md_stripe_count : 0,
1880 (int)newlen, new, PFID(&op_data->op_fid2),
1881 op_data->op_mea2 ? op_data->op_mea2->lsm_md_stripe_count : 0);
1883 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
1884 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
1885 op_data->op_cap = cfs_curproc_cap_pack();
1886 if (op_data->op_cli_flags & CLI_MIGRATE) {
1887 LASSERTF(fid_is_sane(&op_data->op_fid3), "invalid FID "DFID"\n",
1888 PFID(&op_data->op_fid3));
1890 if (op_data->op_mea1 != NULL) {
1891 struct lmv_stripe_md *lsm = op_data->op_mea1;
1892 struct lmv_tgt_desc *tmp;
1894 /* Fix the parent fid for striped dir */
1895 tmp = lmv_locate_target_for_name(lmv, lsm, old,
1900 RETURN(PTR_ERR(tmp));
1903 rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
1907 src_tgt = lmv_find_target(lmv, &op_data->op_fid3);
1908 if (IS_ERR(src_tgt))
1909 RETURN(PTR_ERR(src_tgt));
1911 target_exp = src_tgt->ltd_exp;
1913 if (op_data->op_mea1 != NULL) {
1914 struct lmv_stripe_md *lsm = op_data->op_mea1;
1916 src_tgt = lmv_locate_target_for_name(lmv, lsm, old,
1921 src_tgt = lmv_find_target(lmv, &op_data->op_fid1);
1923 if (IS_ERR(src_tgt))
1924 RETURN(PTR_ERR(src_tgt));
1927 if (op_data->op_mea2 != NULL) {
1928 struct lmv_stripe_md *lsm = op_data->op_mea2;
1930 tgt_tgt = lmv_locate_target_for_name(lmv, lsm, new,
1935 tgt_tgt = lmv_find_target(lmv, &op_data->op_fid2);
1938 if (IS_ERR(tgt_tgt))
1939 RETURN(PTR_ERR(tgt_tgt));
1941 target_exp = tgt_tgt->ltd_exp;
1945 * LOOKUP lock on src child (fid3) should also be cancelled for
1946 * src_tgt in mdc_rename.
1948 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
1951 * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
1954 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
1955 LCK_EX, MDS_INODELOCK_UPDATE,
1956 MF_MDC_CANCEL_FID2);
1961 * Cancel LOOKUP locks on source child (fid3) for parent tgt_tgt.
1963 if (fid_is_sane(&op_data->op_fid3)) {
1964 struct lmv_tgt_desc *tgt;
1966 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1968 RETURN(PTR_ERR(tgt));
1970 /* Cancel LOOKUP lock on its parent */
1971 rc = lmv_early_cancel(exp, tgt, op_data, src_tgt->ltd_idx,
1972 LCK_EX, MDS_INODELOCK_LOOKUP,
1973 MF_MDC_CANCEL_FID3);
1977 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
1978 LCK_EX, MDS_INODELOCK_ELC,
1979 MF_MDC_CANCEL_FID3);
1986 * Cancel all the locks on tgt child (fid4).
1988 if (fid_is_sane(&op_data->op_fid4)) {
1989 struct lmv_tgt_desc *tgt;
1991 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
1992 LCK_EX, MDS_INODELOCK_ELC,
1993 MF_MDC_CANCEL_FID4);
1997 tgt = lmv_find_target(lmv, &op_data->op_fid4);
1999 RETURN(PTR_ERR(tgt));
2001 /* Since the target child might be destroyed, and it might
2002 * become orphan, and we can only check orphan on the local
2003 * MDT right now, so we send rename request to the MDT where
2004 * target child is located. If target child does not exist,
2005 * then it will send the request to the target parent */
2006 target_exp = tgt->ltd_exp;
2009 rc = md_rename(target_exp, op_data, old, oldlen, new, newlen,
2012 if (rc != 0 && rc != -EXDEV)
2015 body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2019 /* Not cross-ref case, just get out of here. */
2020 if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2023 CDEBUG(D_INODE, "%s: try rename to another MDT for "DFID"\n",
2024 exp->exp_obd->obd_name, PFID(&body->mbo_fid1));
2026 op_data->op_fid4 = body->mbo_fid1;
2027 ptlrpc_req_finished(*request);
2032 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2033 void *ea, size_t ealen, struct ptlrpc_request **request)
2035 struct obd_device *obd = exp->exp_obd;
2036 struct lmv_obd *lmv = &obd->u.lmv;
2037 struct lmv_tgt_desc *tgt;
2041 CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x\n",
2042 PFID(&op_data->op_fid1), op_data->op_attr.ia_valid);
2044 op_data->op_flags |= MF_MDC_CANCEL_FID1;
2045 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2047 RETURN(PTR_ERR(tgt));
2049 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, request);
2054 static int lmv_fsync(struct obd_export *exp, const struct lu_fid *fid,
2055 struct ptlrpc_request **request)
2057 struct obd_device *obd = exp->exp_obd;
2058 struct lmv_obd *lmv = &obd->u.lmv;
2059 struct lmv_tgt_desc *tgt;
2063 tgt = lmv_find_target(lmv, fid);
2065 RETURN(PTR_ERR(tgt));
2067 rc = md_fsync(tgt->ltd_exp, fid, request);
2071 struct stripe_dirent {
2072 struct page *sd_page;
2073 struct lu_dirpage *sd_dp;
2074 struct lu_dirent *sd_ent;
2078 struct lmv_dir_ctxt {
2079 struct lmv_obd *ldc_lmv;
2080 struct md_op_data *ldc_op_data;
2081 struct md_callback *ldc_cb_op;
2084 struct stripe_dirent ldc_stripes[0];
2087 static inline void put_stripe_dirent(struct stripe_dirent *stripe)
2089 if (stripe->sd_page) {
2090 kunmap(stripe->sd_page);
2091 put_page(stripe->sd_page);
2092 stripe->sd_page = NULL;
2093 stripe->sd_ent = NULL;
2097 static inline void put_lmv_dir_ctxt(struct lmv_dir_ctxt *ctxt)
2101 for (i = 0; i < ctxt->ldc_count; i++)
2102 put_stripe_dirent(&ctxt->ldc_stripes[i]);
2105 static struct lu_dirent *stripe_dirent_next(struct lmv_dir_ctxt *ctxt,
2106 struct stripe_dirent *stripe,
2109 struct lu_dirent *ent = stripe->sd_ent;
2110 __u64 hash = ctxt->ldc_hash;
2115 LASSERT(stripe == &ctxt->ldc_stripes[stripe_index]);
2121 ent = lu_dirent_next(ent);
2124 end = le64_to_cpu(stripe->sd_dp->ldp_hash_end);
2125 LASSERTF(hash <= end, "hash %llx end %llx\n",
2127 if (end == MDS_DIR_END_OFF) {
2128 stripe->sd_ent = NULL;
2129 stripe->sd_eof = true;
2133 put_stripe_dirent(stripe);
2139 struct md_op_data *op_data = ctxt->ldc_op_data;
2140 struct lmv_oinfo *oinfo;
2141 struct lu_fid fid = op_data->op_fid1;
2142 struct inode *inode = op_data->op_data;
2143 struct lmv_tgt_desc *tgt;
2145 LASSERT(!stripe->sd_page);
2147 oinfo = &op_data->op_mea1->lsm_md_oinfo[stripe_index];
2148 tgt = lmv_get_target(ctxt->ldc_lmv, oinfo->lmo_mds, NULL);
2150 GOTO(out, rc = PTR_ERR(tgt));
2152 /* op_data will be shared by each stripe, so we need
2153 * reset these value for each stripe */
2154 op_data->op_fid1 = oinfo->lmo_fid;
2155 op_data->op_fid2 = oinfo->lmo_fid;
2156 op_data->op_data = oinfo->lmo_root;
2158 rc = md_read_page(tgt->ltd_exp, op_data, ctxt->ldc_cb_op, hash,
2161 op_data->op_fid1 = fid;
2162 op_data->op_fid2 = fid;
2163 op_data->op_data = inode;
2168 stripe->sd_dp = page_address(stripe->sd_page);
2169 ent = lu_dirent_start(stripe->sd_dp);
2172 for (; ent; ent = lu_dirent_next(ent)) {
2173 /* Skip dummy entry */
2174 if (le16_to_cpu(ent->lde_namelen) == 0)
2177 /* skip . and .. for other stripes */
2179 (strncmp(ent->lde_name, ".",
2180 le16_to_cpu(ent->lde_namelen)) == 0 ||
2181 strncmp(ent->lde_name, "..",
2182 le16_to_cpu(ent->lde_namelen)) == 0))
2185 if (le64_to_cpu(ent->lde_hash) >= hash)
2194 stripe->sd_ent = ent;
2195 /* treat error as eof, so dir can be partially accessed */
2197 put_stripe_dirent(stripe);
2198 stripe->sd_eof = true;
2199 LCONSOLE_WARN("dir "DFID" stripe %d readdir failed: %d, "
2200 "directory is partially accessed!\n",
2201 PFID(&ctxt->ldc_op_data->op_fid1), stripe_index,
2208 * Get dirent with the closest hash for striped directory
2210 * This function will search the dir entry, whose hash value is the
2211 * closest(>=) to hash from all of sub-stripes, and it is only being called
2212 * for striped directory.
2214 * \param[in] ctxt dir read context
2216 * \retval dirent get the entry successfully
2217 * NULL does not get the entry, normally it means
2218 * it reaches the end of the directory, while read
2219 * stripe dirent error is ignored to allow partial
2222 static struct lu_dirent *lmv_dirent_next(struct lmv_dir_ctxt *ctxt)
2224 struct stripe_dirent *stripe;
2225 struct lu_dirent *ent = NULL;
2229 /* TODO: optimize with k-way merge sort */
2230 for (i = 0; i < ctxt->ldc_count; i++) {
2231 stripe = &ctxt->ldc_stripes[i];
2235 if (!stripe->sd_ent) {
2236 /* locate starting entry */
2237 stripe_dirent_next(ctxt, stripe, i);
2238 if (!stripe->sd_ent) {
2239 LASSERT(stripe->sd_eof);
2245 le64_to_cpu(ctxt->ldc_stripes[min].sd_ent->lde_hash) >
2246 le64_to_cpu(stripe->sd_ent->lde_hash)) {
2248 if (le64_to_cpu(stripe->sd_ent->lde_hash) ==
2255 stripe = &ctxt->ldc_stripes[min];
2256 ent = stripe->sd_ent;
2257 /* pop found dirent */
2258 stripe_dirent_next(ctxt, stripe, min);
2265 * Build dir entry page for striped directory
2267 * This function gets one entry by @offset from a striped directory. It will
2268 * read entries from all of stripes, and choose one closest to the required
2269 * offset(&offset). A few notes
2270 * 1. skip . and .. for non-zero stripes, because there can only have one .
2271 * and .. in a directory.
2272 * 2. op_data will be shared by all of stripes, instead of allocating new
2273 * one, so need to restore before reusing.
2275 * \param[in] exp obd export refer to LMV
2276 * \param[in] op_data hold those MD parameters of read_entry
2277 * \param[in] cb_op ldlm callback being used in enqueue in mdc_read_entry
2278 * \param[in] offset starting hash offset
2279 * \param[out] ppage the page holding the entry. Note: because the entry
2280 * will be accessed in upper layer, so we need hold the
2281 * page until the usages of entry is finished, see
2282 * ll_dir_entry_next.
2284 * retval =0 if get entry successfully
2285 * <0 cannot get entry
2287 static int lmv_striped_read_page(struct obd_export *exp,
2288 struct md_op_data *op_data,
2289 struct md_callback *cb_op,
2290 __u64 offset, struct page **ppage)
2292 struct page *page = NULL;
2293 struct lu_dirpage *dp;
2295 struct lu_dirent *ent;
2296 struct lu_dirent *last_ent;
2298 struct lmv_dir_ctxt *ctxt;
2299 struct lu_dirent *next = NULL;
2305 /* Allocate a page and read entries from all of stripes and fill
2306 * the page by hash order */
2307 page = alloc_page(GFP_KERNEL);
2311 /* Initialize the entry page */
2313 memset(dp, 0, sizeof(*dp));
2314 dp->ldp_hash_start = cpu_to_le64(offset);
2317 left_bytes = PAGE_SIZE - sizeof(*dp);
2321 /* initalize dir read context */
2322 stripe_count = op_data->op_mea1->lsm_md_stripe_count;
2323 OBD_ALLOC(ctxt, offsetof(typeof(*ctxt), ldc_stripes[stripe_count]));
2325 GOTO(free_page, rc = -ENOMEM);
2326 ctxt->ldc_lmv = &exp->exp_obd->u.lmv;
2327 ctxt->ldc_op_data = op_data;
2328 ctxt->ldc_cb_op = cb_op;
2329 ctxt->ldc_hash = offset;
2330 ctxt->ldc_count = stripe_count;
2333 next = lmv_dirent_next(ctxt);
2335 /* end of directory */
2337 ctxt->ldc_hash = MDS_DIR_END_OFF;
2340 ctxt->ldc_hash = le64_to_cpu(next->lde_hash);
2342 ent_size = le16_to_cpu(next->lde_reclen);
2344 /* the last entry lde_reclen is 0, but it might not be the last
2345 * one of this temporay dir page */
2347 ent_size = lu_dirent_calc_size(
2348 le16_to_cpu(next->lde_namelen),
2349 le32_to_cpu(next->lde_attrs));
2351 if (ent_size > left_bytes)
2354 memcpy(ent, next, ent_size);
2356 /* Replace . with master FID and Replace .. with the parent FID
2357 * of master object */
2358 if (strncmp(ent->lde_name, ".",
2359 le16_to_cpu(ent->lde_namelen)) == 0 &&
2360 le16_to_cpu(ent->lde_namelen) == 1)
2361 fid_cpu_to_le(&ent->lde_fid, &op_data->op_fid1);
2362 else if (strncmp(ent->lde_name, "..",
2363 le16_to_cpu(ent->lde_namelen)) == 0 &&
2364 le16_to_cpu(ent->lde_namelen) == 2)
2365 fid_cpu_to_le(&ent->lde_fid, &op_data->op_fid3);
2367 CDEBUG(D_INODE, "entry %.*s hash %#llx\n",
2368 le16_to_cpu(ent->lde_namelen), ent->lde_name,
2369 le64_to_cpu(ent->lde_hash));
2371 left_bytes -= ent_size;
2372 ent->lde_reclen = cpu_to_le16(ent_size);
2374 ent = (void *)ent + ent_size;
2377 last_ent->lde_reclen = 0;
2380 dp->ldp_flags |= LDF_EMPTY;
2381 else if (ctxt->ldc_hash == le64_to_cpu(last_ent->lde_hash))
2382 dp->ldp_flags |= LDF_COLLIDE;
2383 dp->ldp_flags = cpu_to_le32(dp->ldp_flags);
2384 dp->ldp_hash_end = cpu_to_le64(ctxt->ldc_hash);
2386 put_lmv_dir_ctxt(ctxt);
2387 OBD_FREE(ctxt, offsetof(typeof(*ctxt), ldc_stripes[stripe_count]));
2400 int lmv_read_page(struct obd_export *exp, struct md_op_data *op_data,
2401 struct md_callback *cb_op, __u64 offset,
2402 struct page **ppage)
2404 struct obd_device *obd = exp->exp_obd;
2405 struct lmv_obd *lmv = &obd->u.lmv;
2406 struct lmv_stripe_md *lsm = op_data->op_mea1;
2407 struct lmv_tgt_desc *tgt;
2411 if (unlikely(lsm != NULL)) {
2412 rc = lmv_striped_read_page(exp, op_data, cb_op, offset, ppage);
2416 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2418 RETURN(PTR_ERR(tgt));
2420 rc = md_read_page(tgt->ltd_exp, op_data, cb_op, offset, ppage);
2426 * Unlink a file/directory
2428 * Unlink a file or directory under the parent dir. The unlink request
2429 * usually will be sent to the MDT where the child is located, but if
2430 * the client does not have the child FID then request will be sent to the
2431 * MDT where the parent is located.
2433 * If the parent is a striped directory then it also needs to locate which
2434 * stripe the name of the child is located, and replace the parent FID
2435 * (@op->op_fid1) with the stripe FID. Note: if the stripe is unknown,
2436 * it will walk through all of sub-stripes until the child is being
2439 * \param[in] exp export refer to LMV
2440 * \param[in] op_data different parameters transferred beween client
2441 * MD stacks, name, namelen, FIDs etc.
2442 * op_fid1 is the parent FID, op_fid2 is the child
2444 * \param[out] request point to the request of unlink.
2446 * retval 0 if succeed
2447 * negative errno if failed.
2449 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2450 struct ptlrpc_request **request)
2452 struct obd_device *obd = exp->exp_obd;
2453 struct lmv_obd *lmv = &obd->u.lmv;
2454 struct lmv_tgt_desc *tgt = NULL;
2455 struct lmv_tgt_desc *parent_tgt = NULL;
2456 struct mdt_body *body;
2458 int stripe_index = 0;
2459 struct lmv_stripe_md *lsm = op_data->op_mea1;
2463 /* For striped dir, we need to locate the parent as well */
2465 struct lmv_tgt_desc *tmp;
2467 LASSERT(op_data->op_name != NULL &&
2468 op_data->op_namelen != 0);
2470 tmp = lmv_locate_target_for_name(lmv, lsm,
2472 op_data->op_namelen,
2476 /* return -EBADFD means unknown hash type, might
2477 * need try all sub-stripe here */
2478 if (IS_ERR(tmp) && PTR_ERR(tmp) != -EBADFD)
2479 RETURN(PTR_ERR(tmp));
2481 /* Note: both migrating dir and unknown hash dir need to
2482 * try all of sub-stripes, so we need start search the
2483 * name from stripe 0, but migrating dir is already handled
2484 * inside lmv_locate_target_for_name(), so we only check
2485 * unknown hash type directory here */
2486 if (!lmv_is_known_hash_type(lsm->lsm_md_hash_type)) {
2487 struct lmv_oinfo *oinfo;
2489 oinfo = &lsm->lsm_md_oinfo[stripe_index];
2491 op_data->op_fid1 = oinfo->lmo_fid;
2492 op_data->op_mds = oinfo->lmo_mds;
2497 /* Send unlink requests to the MDT where the child is located */
2498 if (likely(!fid_is_zero(&op_data->op_fid2)))
2499 tgt = lmv_find_target(lmv, &op_data->op_fid2);
2500 else if (lsm != NULL)
2501 tgt = lmv_get_target(lmv, op_data->op_mds, NULL);
2503 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
2506 RETURN(PTR_ERR(tgt));
2508 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2509 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2510 op_data->op_cap = cfs_curproc_cap_pack();
2513 * If child's fid is given, cancel unused locks for it if it is from
2514 * another export than parent.
2516 * LOOKUP lock for child (fid3) should also be cancelled on parent
2517 * tgt_tgt in mdc_unlink().
2519 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2522 * Cancel FULL locks on child (fid3).
2524 parent_tgt = lmv_find_target(lmv, &op_data->op_fid1);
2525 if (IS_ERR(parent_tgt))
2526 RETURN(PTR_ERR(parent_tgt));
2528 if (parent_tgt != tgt) {
2529 rc = lmv_early_cancel(exp, parent_tgt, op_data, tgt->ltd_idx,
2530 LCK_EX, MDS_INODELOCK_LOOKUP,
2531 MF_MDC_CANCEL_FID3);
2534 rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_idx, LCK_EX,
2535 MDS_INODELOCK_ELC, MF_MDC_CANCEL_FID3);
2539 CDEBUG(D_INODE, "unlink with fid="DFID"/"DFID" -> mds #%u\n",
2540 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2), tgt->ltd_idx);
2542 rc = md_unlink(tgt->ltd_exp, op_data, request);
2543 if (rc != 0 && rc != -EREMOTE && rc != -ENOENT)
2546 /* Try next stripe if it is needed. */
2547 if (rc == -ENOENT && lsm != NULL && lmv_need_try_all_stripes(lsm)) {
2548 struct lmv_oinfo *oinfo;
2551 if (stripe_index >= lsm->lsm_md_stripe_count)
2554 oinfo = &lsm->lsm_md_oinfo[stripe_index];
2556 op_data->op_fid1 = oinfo->lmo_fid;
2557 op_data->op_mds = oinfo->lmo_mds;
2559 ptlrpc_req_finished(*request);
2562 goto try_next_stripe;
2565 body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2569 /* Not cross-ref case, just get out of here. */
2570 if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2573 CDEBUG(D_INODE, "%s: try unlink to another MDT for "DFID"\n",
2574 exp->exp_obd->obd_name, PFID(&body->mbo_fid1));
2576 /* This is a remote object, try remote MDT, Note: it may
2577 * try more than 1 time here, Considering following case
2578 * /mnt/lustre is root on MDT0, remote1 is on MDT1
2579 * 1. Initially A does not know where remote1 is, it send
2580 * unlink RPC to MDT0, MDT0 return -EREMOTE, it will
2581 * resend unlink RPC to MDT1 (retry 1st time).
2583 * 2. During the unlink RPC in flight,
2584 * client B mv /mnt/lustre/remote1 /mnt/lustre/remote2
2585 * and create new remote1, but on MDT0
2587 * 3. MDT1 get unlink RPC(from A), then do remote lock on
2588 * /mnt/lustre, then lookup get fid of remote1, and find
2589 * it is remote dir again, and replay -EREMOTE again.
2591 * 4. Then A will resend unlink RPC to MDT0. (retry 2nd times).
2593 * In theory, it might try unlimited time here, but it should
2594 * be very rare case. */
2595 op_data->op_fid2 = body->mbo_fid1;
2596 ptlrpc_req_finished(*request);
2602 static int lmv_precleanup(struct obd_device *obd)
2605 fld_client_proc_fini(&obd->u.lmv.lmv_fld);
2606 lprocfs_obd_cleanup(obd);
2607 lprocfs_free_md_stats(obd);
2612 * Get by key a value associated with a LMV device.
2614 * Dispatch request to lower-layer devices as needed.
2616 * \param[in] env execution environment for this thread
2617 * \param[in] exp export for the LMV device
2618 * \param[in] keylen length of key identifier
2619 * \param[in] key identifier of key to get value for
2620 * \param[in] vallen size of \a val
2621 * \param[out] val pointer to storage location for value
2622 * \param[in] lsm optional striping metadata of object
2624 * \retval 0 on success
2625 * \retval negative negated errno on failure
2627 static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
2628 __u32 keylen, void *key, __u32 *vallen, void *val)
2630 struct obd_device *obd;
2631 struct lmv_obd *lmv;
2635 obd = class_exp2obd(exp);
2637 CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
2638 exp->exp_handle.h_cookie);
2643 if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2646 LASSERT(*vallen == sizeof(__u32));
2647 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2648 struct lmv_tgt_desc *tgt = lmv->tgts[i];
2650 * All tgts should be connected when this gets called.
2652 if (tgt == NULL || tgt->ltd_exp == NULL)
2655 if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
2660 } else if (KEY_IS(KEY_MAX_EASIZE) ||
2661 KEY_IS(KEY_DEFAULT_EASIZE) ||
2662 KEY_IS(KEY_CONN_DATA)) {
2664 * Forwarding this request to first MDS, it should know LOV
2667 rc = obd_get_info(env, lmv->tgts[0]->ltd_exp, keylen, key,
2669 if (!rc && KEY_IS(KEY_CONN_DATA))
2670 exp->exp_connect_data = *(struct obd_connect_data *)val;
2672 } else if (KEY_IS(KEY_TGT_COUNT)) {
2673 *((int *)val) = lmv->desc.ld_tgt_count;
2677 CDEBUG(D_IOCTL, "Invalid key\n");
2682 * Asynchronously set by key a value associated with a LMV device.
2684 * Dispatch request to lower-layer devices as needed.
2686 * \param[in] env execution environment for this thread
2687 * \param[in] exp export for the LMV device
2688 * \param[in] keylen length of key identifier
2689 * \param[in] key identifier of key to store value for
2690 * \param[in] vallen size of value to store
2691 * \param[in] val pointer to data to be stored
2692 * \param[in] set optional list of related ptlrpc requests
2694 * \retval 0 on success
2695 * \retval negative negated errno on failure
2697 int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
2698 __u32 keylen, void *key, __u32 vallen, void *val,
2699 struct ptlrpc_request_set *set)
2701 struct lmv_tgt_desc *tgt = NULL;
2702 struct obd_device *obd;
2703 struct lmv_obd *lmv;
2707 obd = class_exp2obd(exp);
2709 CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
2710 exp->exp_handle.h_cookie);
2715 if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX) ||
2716 KEY_IS(KEY_DEFAULT_EASIZE)) {
2719 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2722 if (tgt == NULL || tgt->ltd_exp == NULL)
2725 err = obd_set_info_async(env, tgt->ltd_exp,
2726 keylen, key, vallen, val, set);
2737 static int lmv_unpack_md_v1(struct obd_export *exp, struct lmv_stripe_md *lsm,
2738 const struct lmv_mds_md_v1 *lmm1)
2740 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2747 lsm->lsm_md_magic = le32_to_cpu(lmm1->lmv_magic);
2748 lsm->lsm_md_stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
2749 lsm->lsm_md_master_mdt_index = le32_to_cpu(lmm1->lmv_master_mdt_index);
2750 if (OBD_FAIL_CHECK(OBD_FAIL_UNKNOWN_LMV_STRIPE))
2751 lsm->lsm_md_hash_type = LMV_HASH_TYPE_UNKNOWN;
2753 lsm->lsm_md_hash_type = le32_to_cpu(lmm1->lmv_hash_type);
2754 lsm->lsm_md_layout_version = le32_to_cpu(lmm1->lmv_layout_version);
2755 cplen = strlcpy(lsm->lsm_md_pool_name, lmm1->lmv_pool_name,
2756 sizeof(lsm->lsm_md_pool_name));
2758 if (cplen >= sizeof(lsm->lsm_md_pool_name))
2761 CDEBUG(D_INFO, "unpack lsm count %d, master %d hash_type %d"
2762 "layout_version %d\n", lsm->lsm_md_stripe_count,
2763 lsm->lsm_md_master_mdt_index, lsm->lsm_md_hash_type,
2764 lsm->lsm_md_layout_version);
2766 stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
2767 for (i = 0; i < stripe_count; i++) {
2768 fid_le_to_cpu(&lsm->lsm_md_oinfo[i].lmo_fid,
2769 &lmm1->lmv_stripe_fids[i]);
2770 rc = lmv_fld_lookup(lmv, &lsm->lsm_md_oinfo[i].lmo_fid,
2771 &lsm->lsm_md_oinfo[i].lmo_mds);
2774 CDEBUG(D_INFO, "unpack fid #%d "DFID"\n", i,
2775 PFID(&lsm->lsm_md_oinfo[i].lmo_fid));
2781 static int lmv_unpackmd(struct obd_export *exp, struct lmv_stripe_md **lsmp,
2782 const union lmv_mds_md *lmm, size_t lmm_size)
2784 struct lmv_stripe_md *lsm;
2787 bool allocated = false;
2790 LASSERT(lsmp != NULL);
2794 if (lsm != NULL && lmm == NULL) {
2796 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
2797 /* For migrating inode, the master stripe and master
2798 * object will be the same, so do not need iput, see
2799 * ll_update_lsm_md */
2800 if (!(lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION &&
2801 i == 0) && lsm->lsm_md_oinfo[i].lmo_root != NULL)
2802 iput(lsm->lsm_md_oinfo[i].lmo_root);
2804 lsm_size = lmv_stripe_md_size(lsm->lsm_md_stripe_count);
2805 OBD_FREE(lsm, lsm_size);
2810 if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_STRIPE)
2814 if (le32_to_cpu(lmm->lmv_magic) != LMV_MAGIC_V1 &&
2815 le32_to_cpu(lmm->lmv_magic) != LMV_USER_MAGIC) {
2816 CERROR("%s: invalid lmv magic %x: rc = %d\n",
2817 exp->exp_obd->obd_name, le32_to_cpu(lmm->lmv_magic),
2822 if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_V1)
2823 lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
2826 * Unpack default dirstripe(lmv_user_md) to lmv_stripe_md,
2827 * stripecount should be 0 then.
2829 lsm_size = lmv_stripe_md_size(0);
2831 lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
2833 OBD_ALLOC(lsm, lsm_size);
2840 switch (le32_to_cpu(lmm->lmv_magic)) {
2842 rc = lmv_unpack_md_v1(exp, lsm, &lmm->lmv_md_v1);
2845 CERROR("%s: unrecognized magic %x\n", exp->exp_obd->obd_name,
2846 le32_to_cpu(lmm->lmv_magic));
2851 if (rc != 0 && allocated) {
2852 OBD_FREE(lsm, lsm_size);
2859 void lmv_free_memmd(struct lmv_stripe_md *lsm)
2861 lmv_unpackmd(NULL, &lsm, NULL, 0);
2863 EXPORT_SYMBOL(lmv_free_memmd);
2865 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
2866 union ldlm_policy_data *policy,
2867 enum ldlm_mode mode, enum ldlm_cancel_flags flags,
2870 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2875 LASSERT(fid != NULL);
2877 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2878 struct lmv_tgt_desc *tgt = lmv->tgts[i];
2881 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
2884 err = md_cancel_unused(tgt->ltd_exp, fid, policy, mode, flags,
2892 static int lmv_set_lock_data(struct obd_export *exp,
2893 const struct lustre_handle *lockh,
2894 void *data, __u64 *bits)
2896 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2897 struct lmv_tgt_desc *tgt = lmv->tgts[0];
2901 if (tgt == NULL || tgt->ltd_exp == NULL)
2903 rc = md_set_lock_data(tgt->ltd_exp, lockh, data, bits);
2907 enum ldlm_mode lmv_lock_match(struct obd_export *exp, __u64 flags,
2908 const struct lu_fid *fid, enum ldlm_type type,
2909 union ldlm_policy_data *policy,
2910 enum ldlm_mode mode, struct lustre_handle *lockh)
2912 struct obd_device *obd = exp->exp_obd;
2913 struct lmv_obd *lmv = &obd->u.lmv;
2919 CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
2922 * With DNE every object can have two locks in different namespaces:
2923 * lookup lock in space of MDT storing direntry and update/open lock in
2924 * space of MDT storing inode. Try the MDT that the FID maps to first,
2925 * since this can be easily found, and only try others if that fails.
2927 for (i = 0, tgt = lmv_find_target_index(lmv, fid);
2928 i < lmv->desc.ld_tgt_count;
2929 i++, tgt = (tgt + 1) % lmv->desc.ld_tgt_count) {
2931 CDEBUG(D_HA, "%s: "DFID" is inaccessible: rc = %d\n",
2932 obd->obd_name, PFID(fid), tgt);
2936 if (lmv->tgts[tgt] == NULL ||
2937 lmv->tgts[tgt]->ltd_exp == NULL ||
2938 lmv->tgts[tgt]->ltd_active == 0)
2941 rc = md_lock_match(lmv->tgts[tgt]->ltd_exp, flags, fid,
2942 type, policy, mode, lockh);
2950 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
2951 struct obd_export *dt_exp, struct obd_export *md_exp,
2952 struct lustre_md *md)
2954 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2955 struct lmv_tgt_desc *tgt = lmv->tgts[0];
2957 if (tgt == NULL || tgt->ltd_exp == NULL)
2960 return md_get_lustre_md(lmv->tgts[0]->ltd_exp, req, dt_exp, md_exp, md);
2963 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
2965 struct obd_device *obd = exp->exp_obd;
2966 struct lmv_obd *lmv = &obd->u.lmv;
2967 struct lmv_tgt_desc *tgt = lmv->tgts[0];
2970 if (md->lmv != NULL) {
2971 lmv_free_memmd(md->lmv);
2974 if (tgt == NULL || tgt->ltd_exp == NULL)
2976 RETURN(md_free_lustre_md(lmv->tgts[0]->ltd_exp, md));
2979 int lmv_set_open_replay_data(struct obd_export *exp,
2980 struct obd_client_handle *och,
2981 struct lookup_intent *it)
2983 struct obd_device *obd = exp->exp_obd;
2984 struct lmv_obd *lmv = &obd->u.lmv;
2985 struct lmv_tgt_desc *tgt;
2988 tgt = lmv_find_target(lmv, &och->och_fid);
2990 RETURN(PTR_ERR(tgt));
2992 RETURN(md_set_open_replay_data(tgt->ltd_exp, och, it));
2995 int lmv_clear_open_replay_data(struct obd_export *exp,
2996 struct obd_client_handle *och)
2998 struct obd_device *obd = exp->exp_obd;
2999 struct lmv_obd *lmv = &obd->u.lmv;
3000 struct lmv_tgt_desc *tgt;
3003 tgt = lmv_find_target(lmv, &och->och_fid);
3005 RETURN(PTR_ERR(tgt));
3007 RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
3010 int lmv_intent_getattr_async(struct obd_export *exp,
3011 struct md_enqueue_info *minfo)
3013 struct md_op_data *op_data = &minfo->mi_data;
3014 struct obd_device *obd = exp->exp_obd;
3015 struct lmv_obd *lmv = &obd->u.lmv;
3016 struct lmv_tgt_desc *tgt = NULL;
3020 if (!fid_is_sane(&op_data->op_fid2))
3023 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
3025 RETURN(PTR_ERR(tgt));
3028 * no special handle for remote dir, which needs to fetch both LOOKUP
3029 * lock on parent, and then UPDATE lock on child MDT, which makes all
3030 * complicated because this is done async. So only LOOKUP lock is
3031 * fetched for remote dir, but considering remote dir is rare case,
3032 * and not supporting it in statahead won't cause any issue, just leave
3036 rc = md_intent_getattr_async(tgt->ltd_exp, minfo);
3040 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
3041 struct lu_fid *fid, __u64 *bits)
3043 struct obd_device *obd = exp->exp_obd;
3044 struct lmv_obd *lmv = &obd->u.lmv;
3045 struct lmv_tgt_desc *tgt;
3049 tgt = lmv_find_target(lmv, fid);
3051 RETURN(PTR_ERR(tgt));
3053 rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
3057 int lmv_get_fid_from_lsm(struct obd_export *exp,
3058 const struct lmv_stripe_md *lsm,
3059 const char *name, int namelen, struct lu_fid *fid)
3061 const struct lmv_oinfo *oinfo;
3063 LASSERT(lsm != NULL);
3064 oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
3066 return PTR_ERR(oinfo);
3068 *fid = oinfo->lmo_fid;
3074 * For lmv, only need to send request to master MDT, and the master MDT will
3075 * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
3076 * we directly fetch data from the slave MDTs.
3078 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
3079 struct obd_quotactl *oqctl)
3081 struct obd_device *obd = class_exp2obd(exp);
3082 struct lmv_obd *lmv = &obd->u.lmv;
3083 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3086 __u64 curspace, curinodes;
3090 tgt->ltd_exp == NULL ||
3092 lmv->desc.ld_tgt_count == 0) {
3093 CERROR("master lmv inactive\n");
3097 if (oqctl->qc_cmd != Q_GETOQUOTA) {
3098 rc = obd_quotactl(tgt->ltd_exp, oqctl);
3102 curspace = curinodes = 0;
3103 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3107 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
3110 err = obd_quotactl(tgt->ltd_exp, oqctl);
3112 CERROR("getquota on mdt %d failed. %d\n", i, err);
3116 curspace += oqctl->qc_dqblk.dqb_curspace;
3117 curinodes += oqctl->qc_dqblk.dqb_curinodes;
3120 oqctl->qc_dqblk.dqb_curspace = curspace;
3121 oqctl->qc_dqblk.dqb_curinodes = curinodes;
3126 static int lmv_merge_attr(struct obd_export *exp,
3127 const struct lmv_stripe_md *lsm,
3128 struct cl_attr *attr,
3129 ldlm_blocking_callback cb_blocking)
3134 rc = lmv_revalidate_slaves(exp, lsm, cb_blocking, 0);
3138 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
3139 struct inode *inode = lsm->lsm_md_oinfo[i].lmo_root;
3141 CDEBUG(D_INFO, ""DFID" size %llu, blocks %llu nlink %u,"
3142 " atime %lu ctime %lu, mtime %lu.\n",
3143 PFID(&lsm->lsm_md_oinfo[i].lmo_fid),
3144 i_size_read(inode), (unsigned long long)inode->i_blocks,
3145 inode->i_nlink, LTIME_S(inode->i_atime),
3146 LTIME_S(inode->i_ctime), LTIME_S(inode->i_mtime));
3148 /* for slave stripe, it needs to subtract nlink for . and .. */
3150 attr->cat_nlink += inode->i_nlink - 2;
3152 attr->cat_nlink = inode->i_nlink;
3154 attr->cat_size += i_size_read(inode);
3155 attr->cat_blocks += inode->i_blocks;
3157 if (attr->cat_atime < LTIME_S(inode->i_atime))
3158 attr->cat_atime = LTIME_S(inode->i_atime);
3160 if (attr->cat_ctime < LTIME_S(inode->i_ctime))
3161 attr->cat_ctime = LTIME_S(inode->i_ctime);
3163 if (attr->cat_mtime < LTIME_S(inode->i_mtime))
3164 attr->cat_mtime = LTIME_S(inode->i_mtime);
3169 struct obd_ops lmv_obd_ops = {
3170 .o_owner = THIS_MODULE,
3171 .o_setup = lmv_setup,
3172 .o_cleanup = lmv_cleanup,
3173 .o_precleanup = lmv_precleanup,
3174 .o_process_config = lmv_process_config,
3175 .o_connect = lmv_connect,
3176 .o_disconnect = lmv_disconnect,
3177 .o_statfs = lmv_statfs,
3178 .o_get_info = lmv_get_info,
3179 .o_set_info_async = lmv_set_info_async,
3180 .o_notify = lmv_notify,
3181 .o_get_uuid = lmv_get_uuid,
3182 .o_iocontrol = lmv_iocontrol,
3183 .o_quotactl = lmv_quotactl
3186 struct md_ops lmv_md_ops = {
3187 .m_get_root = lmv_get_root,
3188 .m_null_inode = lmv_null_inode,
3189 .m_close = lmv_close,
3190 .m_create = lmv_create,
3191 .m_enqueue = lmv_enqueue,
3192 .m_getattr = lmv_getattr,
3193 .m_getxattr = lmv_getxattr,
3194 .m_getattr_name = lmv_getattr_name,
3195 .m_intent_lock = lmv_intent_lock,
3197 .m_rename = lmv_rename,
3198 .m_setattr = lmv_setattr,
3199 .m_setxattr = lmv_setxattr,
3200 .m_fsync = lmv_fsync,
3201 .m_read_page = lmv_read_page,
3202 .m_unlink = lmv_unlink,
3203 .m_init_ea_size = lmv_init_ea_size,
3204 .m_cancel_unused = lmv_cancel_unused,
3205 .m_set_lock_data = lmv_set_lock_data,
3206 .m_lock_match = lmv_lock_match,
3207 .m_get_lustre_md = lmv_get_lustre_md,
3208 .m_free_lustre_md = lmv_free_lustre_md,
3209 .m_merge_attr = lmv_merge_attr,
3210 .m_set_open_replay_data = lmv_set_open_replay_data,
3211 .m_clear_open_replay_data = lmv_clear_open_replay_data,
3212 .m_intent_getattr_async = lmv_intent_getattr_async,
3213 .m_revalidate_lock = lmv_revalidate_lock,
3214 .m_get_fid_from_lsm = lmv_get_fid_from_lsm,
3215 .m_unpackmd = lmv_unpackmd,
3218 static int __init lmv_init(void)
3220 return class_register_type(&lmv_obd_ops, &lmv_md_ops, true, NULL,
3221 LUSTRE_LMV_NAME, NULL);
3224 static void __exit lmv_exit(void)
3226 class_unregister_type(LUSTRE_LMV_NAME);
3229 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3230 MODULE_DESCRIPTION("Lustre Logical Metadata Volume");
3231 MODULE_VERSION(LUSTRE_VERSION_STRING);
3232 MODULE_LICENSE("GPL");
3234 module_init(lmv_init);
3235 module_exit(lmv_exit);