4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LMV
38 #include <linux/slab.h>
39 #include <linux/module.h>
40 #include <linux/init.h>
41 #include <linux/user_namespace.h>
42 #ifdef HAVE_UIDGID_HEADER
43 # include <linux/uidgid.h>
45 #include <linux/slab.h>
46 #include <linux/pagemap.h>
48 #include <linux/math64.h>
49 #include <linux/seq_file.h>
50 #include <linux/namei.h>
52 #include <lustre/lustre_idl.h>
53 #include <obd_support.h>
54 #include <lustre_lib.h>
55 #include <lustre_net.h>
56 #include <obd_class.h>
57 #include <lustre_lmv.h>
58 #include <lprocfs_status.h>
59 #include <cl_object.h>
60 #include <lustre_fid.h>
61 #include <lustre_ioctl.h>
62 #include <lustre_kernelcomm.h>
63 #include "lmv_internal.h"
65 static void lmv_activate_target(struct lmv_obd *lmv,
66 struct lmv_tgt_desc *tgt,
69 if (tgt->ltd_active == activate)
72 tgt->ltd_active = activate;
73 lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
79 * -EINVAL : UUID can't be found in the LMV's target list
80 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
81 * -EBADF : The UUID is found, but the OBD of the wrong type (!)
83 static int lmv_set_mdc_active(struct lmv_obd *lmv,
84 const struct obd_uuid *uuid,
87 struct lmv_tgt_desc *tgt = NULL;
88 struct obd_device *obd;
93 CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
94 lmv, uuid->uuid, activate);
96 spin_lock(&lmv->lmv_lock);
97 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
99 if (tgt == NULL || tgt->ltd_exp == NULL)
102 CDEBUG(D_INFO, "Target idx %d is %s conn "LPX64"\n", i,
103 tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
105 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
109 if (i == lmv->desc.ld_tgt_count)
110 GOTO(out_lmv_lock, rc = -EINVAL);
112 obd = class_exp2obd(tgt->ltd_exp);
114 GOTO(out_lmv_lock, rc = -ENOTCONN);
116 CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
117 obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
118 obd->obd_type->typ_name, i);
119 LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
121 if (tgt->ltd_active == activate) {
122 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
123 activate ? "" : "in");
124 GOTO(out_lmv_lock, rc);
127 CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
128 activate ? "" : "in");
129 lmv_activate_target(lmv, tgt, activate);
133 spin_unlock(&lmv->lmv_lock);
137 struct obd_uuid *lmv_get_uuid(struct obd_export *exp)
139 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
140 struct lmv_tgt_desc *tgt = lmv->tgts[0];
142 return (tgt == NULL) ? NULL : obd_get_uuid(tgt->ltd_exp);
145 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
146 enum obd_notify_event ev, void *data)
148 struct obd_connect_data *conn_data;
149 struct lmv_obd *lmv = &obd->u.lmv;
150 struct obd_uuid *uuid;
154 if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
155 CERROR("unexpected notification of %s %s!\n",
156 watched->obd_type->typ_name,
161 uuid = &watched->u.cli.cl_target_uuid;
162 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
164 * Set MDC as active before notifying the observer, so the
165 * observer can use the MDC normally.
167 rc = lmv_set_mdc_active(lmv, uuid,
168 ev == OBD_NOTIFY_ACTIVE);
170 CERROR("%sactivation of %s failed: %d\n",
171 ev == OBD_NOTIFY_ACTIVE ? "" : "de",
175 } else if (ev == OBD_NOTIFY_OCD) {
176 conn_data = &watched->u.cli.cl_import->imp_connect_data;
178 * XXX: Make sure that ocd_connect_flags from all targets are
179 * the same. Otherwise one of MDTs runs wrong version or
180 * something like this. --umka
182 obd->obd_self_export->exp_connect_data = *conn_data;
185 else if (ev == OBD_NOTIFY_DISCON) {
187 * For disconnect event, flush fld cache for failout MDS case.
189 fld_client_flush(&lmv->lmv_fld);
193 * Pass the notification up the chain.
195 if (obd->obd_observer)
196 rc = obd_notify(obd->obd_observer, watched, ev, data);
202 * This is fake connect function. Its purpose is to initialize lmv and say
203 * caller that everything is okay. Real connection will be performed later.
205 static int lmv_connect(const struct lu_env *env,
206 struct obd_export **exp, struct obd_device *obd,
207 struct obd_uuid *cluuid, struct obd_connect_data *data,
210 struct lmv_obd *lmv = &obd->u.lmv;
211 struct lustre_handle conn = { 0 };
216 * We don't want to actually do the underlying connections more than
217 * once, so keep track.
220 if (lmv->refcount > 1) {
225 rc = class_connect(&conn, obd, cluuid);
227 CERROR("class_connection() returned %d\n", rc);
231 *exp = class_conn2export(&conn);
232 class_export_get(*exp);
236 lmv->cluuid = *cluuid;
239 lmv->conn_data = *data;
241 if (lmv->targets_proc_entry == NULL) {
242 lmv->targets_proc_entry = lprocfs_register("target_obds",
245 if (IS_ERR(lmv->targets_proc_entry)) {
246 CERROR("%s: cannot register "
247 "/proc/fs/lustre/%s/%s/target_obds\n",
248 obd->obd_name, obd->obd_type->typ_name,
250 lmv->targets_proc_entry = NULL;
255 * All real clients should perform actual connection right away, because
256 * it is possible, that LMV will not have opportunity to connect targets
257 * and MDC stuff will be called directly, for instance while reading
258 * ../mdc/../kbytesfree procfs file, etc.
260 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_REAL))
261 rc = lmv_check_connect(obd);
263 if (rc && lmv->targets_proc_entry != NULL)
264 lprocfs_remove(&lmv->targets_proc_entry);
268 static int lmv_init_ea_size(struct obd_export *exp, __u32 easize,
271 struct obd_device *obd = exp->exp_obd;
272 struct lmv_obd *lmv = &obd->u.lmv;
278 if (lmv->max_easize < easize) {
279 lmv->max_easize = easize;
282 if (lmv->max_def_easize < def_easize) {
283 lmv->max_def_easize = def_easize;
290 if (lmv->connected == 0)
293 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
294 struct lmv_tgt_desc *tgt = lmv->tgts[i];
296 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active) {
297 CWARN("%s: NULL export for %d\n", obd->obd_name, i);
301 rc = md_init_ea_size(tgt->ltd_exp, easize, def_easize);
303 CERROR("%s: obd_init_ea_size() failed on MDT target %d:"
304 " rc = %d\n", obd->obd_name, i, rc);
311 #define MAX_STRING_SIZE 128
313 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
315 struct lmv_obd *lmv = &obd->u.lmv;
316 struct obd_uuid *cluuid = &lmv->cluuid;
317 struct obd_uuid lmv_mdc_uuid = { "LMV_MDC_UUID" };
318 struct obd_device *mdc_obd;
319 struct obd_export *mdc_exp;
320 struct lu_fld_target target;
324 mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
327 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
331 CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
332 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
333 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
336 if (!mdc_obd->obd_set_up) {
337 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
341 rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
342 &lmv->conn_data, NULL);
344 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
349 * Init fid sequence client for this mdc and add new fld target.
351 rc = obd_fid_init(mdc_obd, mdc_exp, LUSTRE_SEQ_METADATA);
355 target.ft_srv = NULL;
356 target.ft_exp = mdc_exp;
357 target.ft_idx = tgt->ltd_idx;
359 fld_client_add_target(&lmv->lmv_fld, &target);
361 rc = obd_register_observer(mdc_obd, obd);
363 obd_disconnect(mdc_exp);
364 CERROR("target %s register_observer error %d\n",
365 tgt->ltd_uuid.uuid, rc);
369 if (obd->obd_observer) {
371 * Tell the observer about the new target.
373 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
375 (void *)(tgt - lmv->tgts[0]));
377 obd_disconnect(mdc_exp);
383 tgt->ltd_exp = mdc_exp;
384 lmv->desc.ld_active_tgt_count++;
386 md_init_ea_size(tgt->ltd_exp, lmv->max_easize, lmv->max_def_easize);
388 CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
389 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
390 atomic_read(&obd->obd_refcount));
392 if (lmv->targets_proc_entry != NULL) {
393 struct proc_dir_entry *mdc_symlink;
395 LASSERT(mdc_obd->obd_type != NULL);
396 LASSERT(mdc_obd->obd_type->typ_name != NULL);
397 mdc_symlink = lprocfs_add_symlink(mdc_obd->obd_name,
398 lmv->targets_proc_entry,
400 mdc_obd->obd_type->typ_name,
402 if (mdc_symlink == NULL) {
403 CERROR("cannot register LMV target "
404 "/proc/fs/lustre/%s/%s/target_obds/%s\n",
405 obd->obd_type->typ_name, obd->obd_name,
412 static void lmv_del_target(struct lmv_obd *lmv, int index)
414 if (lmv->tgts[index] == NULL)
417 OBD_FREE_PTR(lmv->tgts[index]);
418 lmv->tgts[index] = NULL;
422 static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
423 __u32 index, int gen)
425 struct lmv_obd *lmv = &obd->u.lmv;
426 struct lmv_tgt_desc *tgt;
427 int orig_tgt_count = 0;
431 CDEBUG(D_CONFIG, "Target uuid: %s. index %d\n", uuidp->uuid, index);
433 mutex_lock(&lmv->lmv_init_mutex);
435 if (lmv->desc.ld_tgt_count == 0) {
436 struct obd_device *mdc_obd;
438 mdc_obd = class_find_client_obd(uuidp, LUSTRE_MDC_NAME,
441 mutex_unlock(&lmv->lmv_init_mutex);
442 CERROR("%s: Target %s not attached: rc = %d\n",
443 obd->obd_name, uuidp->uuid, -EINVAL);
448 if ((index < lmv->tgts_size) && (lmv->tgts[index] != NULL)) {
449 tgt = lmv->tgts[index];
450 CERROR("%s: UUID %s already assigned at LOV target index %d:"
451 " rc = %d\n", obd->obd_name,
452 obd_uuid2str(&tgt->ltd_uuid), index, -EEXIST);
453 mutex_unlock(&lmv->lmv_init_mutex);
457 if (index >= lmv->tgts_size) {
458 /* We need to reallocate the lmv target array. */
459 struct lmv_tgt_desc **newtgts, **old = NULL;
463 while (newsize < index + 1)
464 newsize = newsize << 1;
465 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
466 if (newtgts == NULL) {
467 mutex_unlock(&lmv->lmv_init_mutex);
471 if (lmv->tgts_size) {
472 memcpy(newtgts, lmv->tgts,
473 sizeof(*newtgts) * lmv->tgts_size);
475 oldsize = lmv->tgts_size;
479 lmv->tgts_size = newsize;
482 OBD_FREE(old, sizeof(*old) * oldsize);
484 CDEBUG(D_CONFIG, "tgts: %p size: %d\n", lmv->tgts,
490 mutex_unlock(&lmv->lmv_init_mutex);
494 mutex_init(&tgt->ltd_fid_mutex);
495 tgt->ltd_idx = index;
496 tgt->ltd_uuid = *uuidp;
498 lmv->tgts[index] = tgt;
499 if (index >= lmv->desc.ld_tgt_count) {
500 orig_tgt_count = lmv->desc.ld_tgt_count;
501 lmv->desc.ld_tgt_count = index + 1;
504 if (lmv->connected) {
505 rc = lmv_connect_mdc(obd, tgt);
507 spin_lock(&lmv->lmv_lock);
508 if (lmv->desc.ld_tgt_count == index + 1)
509 lmv->desc.ld_tgt_count = orig_tgt_count;
510 memset(tgt, 0, sizeof(*tgt));
511 spin_unlock(&lmv->lmv_lock);
513 int easize = sizeof(struct lmv_stripe_md) +
514 lmv->desc.ld_tgt_count * sizeof(struct lu_fid);
515 lmv_init_ea_size(obd->obd_self_export, easize, 0);
519 mutex_unlock(&lmv->lmv_init_mutex);
523 int lmv_check_connect(struct obd_device *obd)
525 struct lmv_obd *lmv = &obd->u.lmv;
526 struct lmv_tgt_desc *tgt;
535 mutex_lock(&lmv->lmv_init_mutex);
536 if (lmv->connected) {
537 mutex_unlock(&lmv->lmv_init_mutex);
541 if (lmv->desc.ld_tgt_count == 0) {
542 mutex_unlock(&lmv->lmv_init_mutex);
543 CERROR("%s: no targets configured.\n", obd->obd_name);
547 LASSERT(lmv->tgts != NULL);
549 if (lmv->tgts[0] == NULL) {
550 mutex_unlock(&lmv->lmv_init_mutex);
551 CERROR("%s: no target configured for index 0.\n",
556 CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
557 lmv->cluuid.uuid, obd->obd_name);
559 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
563 rc = lmv_connect_mdc(obd, tgt);
568 class_export_put(lmv->exp);
570 easize = lmv_mds_md_size(lmv->desc.ld_tgt_count, LMV_MAGIC);
571 lmv_init_ea_size(obd->obd_self_export, easize, 0);
572 mutex_unlock(&lmv->lmv_init_mutex);
583 --lmv->desc.ld_active_tgt_count;
584 rc2 = obd_disconnect(tgt->ltd_exp);
586 CERROR("LMV target %s disconnect on "
587 "MDC idx %d: error %d\n",
588 tgt->ltd_uuid.uuid, i, rc2);
592 class_disconnect(lmv->exp);
593 mutex_unlock(&lmv->lmv_init_mutex);
597 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
599 struct lmv_obd *lmv = &obd->u.lmv;
600 struct obd_device *mdc_obd;
604 LASSERT(tgt != NULL);
605 LASSERT(obd != NULL);
607 mdc_obd = class_exp2obd(tgt->ltd_exp);
610 mdc_obd->obd_force = obd->obd_force;
611 mdc_obd->obd_fail = obd->obd_fail;
612 mdc_obd->obd_no_recov = obd->obd_no_recov;
614 if (lmv->targets_proc_entry != NULL)
615 lprocfs_remove_proc_entry(mdc_obd->obd_name,
616 lmv->targets_proc_entry);
619 rc = obd_fid_fini(tgt->ltd_exp->exp_obd);
621 CERROR("Can't finanize fids factory\n");
623 CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
624 tgt->ltd_exp->exp_obd->obd_name,
625 tgt->ltd_exp->exp_obd->obd_uuid.uuid);
627 obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
628 rc = obd_disconnect(tgt->ltd_exp);
630 if (tgt->ltd_active) {
631 CERROR("Target %s disconnect error %d\n",
632 tgt->ltd_uuid.uuid, rc);
636 lmv_activate_target(lmv, tgt, 0);
641 static int lmv_disconnect(struct obd_export *exp)
643 struct obd_device *obd = class_exp2obd(exp);
644 struct lmv_obd *lmv = &obd->u.lmv;
653 * Only disconnect the underlying layers on the final disconnect.
656 if (lmv->refcount != 0)
659 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
660 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
663 lmv_disconnect_mdc(obd, lmv->tgts[i]);
666 if (lmv->targets_proc_entry != NULL)
667 lprocfs_remove(&lmv->targets_proc_entry);
669 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
670 obd->obd_type->typ_name, obd->obd_name);
674 * This is the case when no real connection is established by
675 * lmv_check_connect().
678 class_export_put(exp);
679 rc = class_disconnect(exp);
680 if (lmv->refcount == 0)
685 static int lmv_fid2path(struct obd_export *exp, int len, void *karg, void *uarg)
687 struct obd_device *obddev = class_exp2obd(exp);
688 struct lmv_obd *lmv = &obddev->u.lmv;
689 struct getinfo_fid2path *gf;
690 struct lmv_tgt_desc *tgt;
691 struct getinfo_fid2path *remote_gf = NULL;
692 int remote_gf_size = 0;
695 gf = (struct getinfo_fid2path *)karg;
696 tgt = lmv_find_target(lmv, &gf->gf_fid);
698 RETURN(PTR_ERR(tgt));
701 rc = obd_iocontrol(OBD_IOC_FID2PATH, tgt->ltd_exp, len, gf, uarg);
702 if (rc != 0 && rc != -EREMOTE)
703 GOTO(out_fid2path, rc);
705 /* If remote_gf != NULL, it means just building the
706 * path on the remote MDT, copy this path segement to gf */
707 if (remote_gf != NULL) {
708 struct getinfo_fid2path *ori_gf;
711 ori_gf = (struct getinfo_fid2path *)karg;
712 if (strlen(ori_gf->gf_path) +
713 strlen(gf->gf_path) > ori_gf->gf_pathlen)
714 GOTO(out_fid2path, rc = -EOVERFLOW);
716 ptr = ori_gf->gf_path;
718 memmove(ptr + strlen(gf->gf_path) + 1, ptr,
719 strlen(ori_gf->gf_path));
721 strncpy(ptr, gf->gf_path, strlen(gf->gf_path));
722 ptr += strlen(gf->gf_path);
726 CDEBUG(D_INFO, "%s: get path %s "DFID" rec: "LPU64" ln: %u\n",
727 tgt->ltd_exp->exp_obd->obd_name,
728 gf->gf_path, PFID(&gf->gf_fid), gf->gf_recno,
732 GOTO(out_fid2path, rc);
734 /* sigh, has to go to another MDT to do path building further */
735 if (remote_gf == NULL) {
736 remote_gf_size = sizeof(*remote_gf) + PATH_MAX;
737 OBD_ALLOC(remote_gf, remote_gf_size);
738 if (remote_gf == NULL)
739 GOTO(out_fid2path, rc = -ENOMEM);
740 remote_gf->gf_pathlen = PATH_MAX;
743 if (!fid_is_sane(&gf->gf_fid)) {
744 CERROR("%s: invalid FID "DFID": rc = %d\n",
745 tgt->ltd_exp->exp_obd->obd_name,
746 PFID(&gf->gf_fid), -EINVAL);
747 GOTO(out_fid2path, rc = -EINVAL);
750 tgt = lmv_find_target(lmv, &gf->gf_fid);
752 GOTO(out_fid2path, rc = -EINVAL);
754 remote_gf->gf_fid = gf->gf_fid;
755 remote_gf->gf_recno = -1;
756 remote_gf->gf_linkno = -1;
757 memset(remote_gf->gf_path, 0, remote_gf->gf_pathlen);
759 goto repeat_fid2path;
762 if (remote_gf != NULL)
763 OBD_FREE(remote_gf, remote_gf_size);
767 static int lmv_hsm_req_count(struct lmv_obd *lmv,
768 const struct hsm_user_request *hur,
769 const struct lmv_tgt_desc *tgt_mds)
773 struct lmv_tgt_desc *curr_tgt;
775 /* count how many requests must be sent to the given target */
776 for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
777 curr_tgt = lmv_find_target(lmv, &hur->hur_user_item[i].hui_fid);
778 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid))
784 static void lmv_hsm_req_build(struct lmv_obd *lmv,
785 struct hsm_user_request *hur_in,
786 const struct lmv_tgt_desc *tgt_mds,
787 struct hsm_user_request *hur_out)
790 struct lmv_tgt_desc *curr_tgt;
792 /* build the hsm_user_request for the given target */
793 hur_out->hur_request = hur_in->hur_request;
795 for (i = 0; i < hur_in->hur_request.hr_itemcount; i++) {
796 curr_tgt = lmv_find_target(lmv,
797 &hur_in->hur_user_item[i].hui_fid);
798 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid)) {
799 hur_out->hur_user_item[nr_out] =
800 hur_in->hur_user_item[i];
804 hur_out->hur_request.hr_itemcount = nr_out;
805 memcpy(hur_data(hur_out), hur_data(hur_in),
806 hur_in->hur_request.hr_data_len);
809 static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len,
810 struct lustre_kernelcomm *lk, void *uarg)
814 struct kkuc_ct_data *kcd = NULL;
817 /* unregister request (call from llapi_hsm_copytool_fini) */
818 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
819 struct lmv_tgt_desc *tgt = lmv->tgts[i];
821 if (tgt == NULL || tgt->ltd_exp == NULL)
823 /* best effort: try to clean as much as possible
824 * (continue on error) */
825 obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
828 /* Whatever the result, remove copytool from kuc groups.
829 * Unreached coordinators will get EPIPE on next requests
830 * and will unregister automatically.
832 rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group, (void **)&kcd);
839 static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len,
840 struct lustre_kernelcomm *lk, void *uarg)
845 bool any_set = false;
846 struct kkuc_ct_data *kcd;
849 /* All or nothing: try to register to all MDS.
850 * In case of failure, unregister from previous MDS,
851 * except if it because of inactive target. */
852 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
853 struct lmv_tgt_desc *tgt = lmv->tgts[i];
855 if (tgt == NULL || tgt->ltd_exp == NULL)
857 err = obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
859 if (tgt->ltd_active) {
860 /* permanent error */
861 CERROR("%s: iocontrol MDC %s on MDT"
862 " idx %d cmd %x: err = %d\n",
863 class_exp2obd(lmv->exp)->obd_name,
864 tgt->ltd_uuid.uuid, i, cmd, err);
866 lk->lk_flags |= LK_FLG_STOP;
867 /* unregister from previous MDS */
868 for (j = 0; j < i; j++) {
870 if (tgt == NULL || tgt->ltd_exp == NULL)
872 obd_iocontrol(cmd, tgt->ltd_exp, len,
877 /* else: transient error.
878 * kuc will register to the missing MDT
886 /* no registration done: return error */
889 /* at least one registration done, with no failure */
890 filp = fget(lk->lk_wfd);
899 kcd->kcd_magic = KKUC_CT_DATA_MAGIC;
900 kcd->kcd_uuid = lmv->cluuid;
901 kcd->kcd_archive = lk->lk_data;
903 rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group, kcd);
916 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
917 int len, void *karg, void *uarg)
919 struct obd_device *obddev = class_exp2obd(exp);
920 struct lmv_obd *lmv = &obddev->u.lmv;
921 struct lmv_tgt_desc *tgt = NULL;
925 __u32 count = lmv->desc.ld_tgt_count;
932 case IOC_OBD_STATFS: {
933 struct obd_ioctl_data *data = karg;
934 struct obd_device *mdc_obd;
935 struct obd_statfs stat_buf = {0};
938 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
939 if ((index >= count))
942 tgt = lmv->tgts[index];
943 if (tgt == NULL || !tgt->ltd_active)
946 mdc_obd = class_exp2obd(tgt->ltd_exp);
951 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
952 min((int) data->ioc_plen2,
953 (int) sizeof(struct obd_uuid))))
956 rc = obd_statfs(NULL, tgt->ltd_exp, &stat_buf,
957 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
961 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
962 min((int) data->ioc_plen1,
963 (int) sizeof(stat_buf))))
967 case OBD_IOC_QUOTACTL: {
968 struct if_quotactl *qctl = karg;
969 struct obd_quotactl *oqctl;
971 if (qctl->qc_valid == QC_MDTIDX) {
972 if (count <= qctl->qc_idx)
975 tgt = lmv->tgts[qctl->qc_idx];
976 if (tgt == NULL || tgt->ltd_exp == NULL)
978 } else if (qctl->qc_valid == QC_UUID) {
979 for (i = 0; i < count; i++) {
983 if (!obd_uuid_equals(&tgt->ltd_uuid,
987 if (tgt->ltd_exp == NULL)
999 LASSERT(tgt != NULL && tgt->ltd_exp != NULL);
1000 OBD_ALLOC_PTR(oqctl);
1004 QCTL_COPY(oqctl, qctl);
1005 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1007 QCTL_COPY(qctl, oqctl);
1008 qctl->qc_valid = QC_MDTIDX;
1009 qctl->obd_uuid = tgt->ltd_uuid;
1011 OBD_FREE_PTR(oqctl);
1014 case OBD_IOC_CHANGELOG_SEND:
1015 case OBD_IOC_CHANGELOG_CLEAR: {
1016 struct ioc_changelog *icc = karg;
1018 if (icc->icc_mdtindex >= count)
1021 tgt = lmv->tgts[icc->icc_mdtindex];
1022 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
1024 rc = obd_iocontrol(cmd, tgt->ltd_exp, sizeof(*icc), icc, NULL);
1027 case LL_IOC_GET_CONNECT_FLAGS: {
1029 if (tgt == NULL || tgt->ltd_exp == NULL)
1031 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1034 case LL_IOC_FID2MDTIDX: {
1035 struct lu_fid *fid = karg;
1038 rc = lmv_fld_lookup(lmv, fid, &mdt_index);
1042 /* Note: this is from llite(see ll_dir_ioctl()), @uarg does not
1043 * point to user space memory for FID2MDTIDX. */
1044 *(__u32 *)uarg = mdt_index;
1047 case OBD_IOC_FID2PATH: {
1048 rc = lmv_fid2path(exp, len, karg, uarg);
1051 case LL_IOC_HSM_STATE_GET:
1052 case LL_IOC_HSM_STATE_SET:
1053 case LL_IOC_HSM_ACTION: {
1054 struct md_op_data *op_data = karg;
1056 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1058 RETURN(PTR_ERR(tgt));
1060 if (tgt->ltd_exp == NULL)
1063 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1066 case LL_IOC_HSM_PROGRESS: {
1067 const struct hsm_progress_kernel *hpk = karg;
1069 tgt = lmv_find_target(lmv, &hpk->hpk_fid);
1071 RETURN(PTR_ERR(tgt));
1072 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1075 case LL_IOC_HSM_REQUEST: {
1076 struct hsm_user_request *hur = karg;
1077 unsigned int reqcount = hur->hur_request.hr_itemcount;
1082 /* if the request is about a single fid
1083 * or if there is a single MDS, no need to split
1085 if (reqcount == 1 || count == 1) {
1086 tgt = lmv_find_target(lmv,
1087 &hur->hur_user_item[0].hui_fid);
1089 RETURN(PTR_ERR(tgt));
1090 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1092 /* split fid list to their respective MDS */
1093 for (i = 0; i < count; i++) {
1094 unsigned int nr, reqlen;
1096 struct hsm_user_request *req;
1099 if (tgt == NULL || tgt->ltd_exp == NULL)
1102 nr = lmv_hsm_req_count(lmv, hur, tgt);
1103 if (nr == 0) /* nothing for this MDS */
1106 /* build a request with fids for this MDS */
1107 reqlen = offsetof(typeof(*hur),
1109 + hur->hur_request.hr_data_len;
1110 OBD_ALLOC_LARGE(req, reqlen);
1114 lmv_hsm_req_build(lmv, hur, tgt, req);
1116 rc1 = obd_iocontrol(cmd, tgt->ltd_exp, reqlen,
1118 if (rc1 != 0 && rc == 0)
1120 OBD_FREE_LARGE(req, reqlen);
1125 case LL_IOC_LOV_SWAP_LAYOUTS: {
1126 struct md_op_data *op_data = karg;
1127 struct lmv_tgt_desc *tgt1, *tgt2;
1129 tgt1 = lmv_find_target(lmv, &op_data->op_fid1);
1131 RETURN(PTR_ERR(tgt1));
1133 tgt2 = lmv_find_target(lmv, &op_data->op_fid2);
1135 RETURN(PTR_ERR(tgt2));
1137 if ((tgt1->ltd_exp == NULL) || (tgt2->ltd_exp == NULL))
1140 /* only files on same MDT can have their layouts swapped */
1141 if (tgt1->ltd_idx != tgt2->ltd_idx)
1144 rc = obd_iocontrol(cmd, tgt1->ltd_exp, len, karg, uarg);
1147 case LL_IOC_HSM_CT_START: {
1148 struct lustre_kernelcomm *lk = karg;
1149 if (lk->lk_flags & LK_FLG_STOP)
1150 rc = lmv_hsm_ct_unregister(lmv, cmd, len, lk, uarg);
1152 rc = lmv_hsm_ct_register(lmv, cmd, len, lk, uarg);
1156 for (i = 0; i < count; i++) {
1157 struct obd_device *mdc_obd;
1161 if (tgt == NULL || tgt->ltd_exp == NULL)
1163 /* ll_umount_begin() sets force flag but for lmv, not
1164 * mdc. Let's pass it through */
1165 mdc_obd = class_exp2obd(tgt->ltd_exp);
1166 mdc_obd->obd_force = obddev->obd_force;
1167 err = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1169 if (tgt->ltd_active) {
1170 CERROR("error: iocontrol MDC %s on MDT"
1171 " idx %d cmd %x: err = %d\n",
1172 tgt->ltd_uuid.uuid, i, cmd, err);
1186 static int lmv_all_chars_policy(int count, const char *name,
1197 static int lmv_nid_policy(struct lmv_obd *lmv)
1199 struct obd_import *imp;
1203 * XXX: To get nid we assume that underlying obd device is mdc.
1205 imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
1206 id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
1207 return id % lmv->desc.ld_tgt_count;
1210 static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1211 placement_policy_t placement)
1213 switch (placement) {
1214 case PLACEMENT_CHAR_POLICY:
1215 return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
1217 op_data->op_namelen);
1218 case PLACEMENT_NID_POLICY:
1219 return lmv_nid_policy(lmv);
1225 CERROR("Unsupported placement policy %x\n", placement);
1231 * This is _inode_ placement policy function (not name).
1233 static int lmv_placement_policy(struct obd_device *obd,
1234 struct md_op_data *op_data, u32 *mds)
1236 struct lmv_obd *lmv = &obd->u.lmv;
1239 LASSERT(mds != NULL);
1241 if (lmv->desc.ld_tgt_count == 1) {
1246 if (op_data->op_default_stripe_offset != -1) {
1247 *mds = op_data->op_default_stripe_offset;
1252 * If stripe_offset is provided during setdirstripe
1253 * (setdirstripe -i xx), xx MDS will be choosen.
1255 if (op_data->op_cli_flags & CLI_SET_MEA && op_data->op_data != NULL) {
1256 struct lmv_user_md *lum;
1258 lum = op_data->op_data;
1260 if (le32_to_cpu(lum->lum_stripe_offset) != (__u32)-1) {
1261 *mds = le32_to_cpu(lum->lum_stripe_offset);
1263 /* -1 means default, which will be in the same MDT with
1265 *mds = op_data->op_mds;
1266 lum->lum_stripe_offset = cpu_to_le32(op_data->op_mds);
1269 /* Allocate new fid on target according to operation type and
1270 * parent home mds. */
1271 *mds = op_data->op_mds;
1277 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds)
1279 struct lmv_tgt_desc *tgt;
1283 tgt = lmv_get_target(lmv, mds, NULL);
1285 RETURN(PTR_ERR(tgt));
1288 * New seq alloc and FLD setup should be atomic. Otherwise we may find
1289 * on server that seq in new allocated fid is not yet known.
1291 mutex_lock(&tgt->ltd_fid_mutex);
1293 if (tgt->ltd_active == 0 || tgt->ltd_exp == NULL)
1294 GOTO(out, rc = -ENODEV);
1297 * Asking underlying tgt layer to allocate new fid.
1299 rc = obd_fid_alloc(NULL, tgt->ltd_exp, fid, NULL);
1301 LASSERT(fid_is_sane(fid));
1307 mutex_unlock(&tgt->ltd_fid_mutex);
1311 int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
1312 struct lu_fid *fid, struct md_op_data *op_data)
1314 struct obd_device *obd = class_exp2obd(exp);
1315 struct lmv_obd *lmv = &obd->u.lmv;
1320 LASSERT(op_data != NULL);
1321 LASSERT(fid != NULL);
1323 rc = lmv_placement_policy(obd, op_data, &mds);
1325 CERROR("Can't get target for allocating fid, "
1330 rc = __lmv_fid_alloc(lmv, fid, mds);
1332 CERROR("Can't alloc new fid, rc %d\n", rc);
1339 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1341 struct lmv_obd *lmv = &obd->u.lmv;
1342 struct lmv_desc *desc;
1346 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1347 CERROR("LMV setup requires a descriptor\n");
1351 desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1352 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1353 CERROR("Lmv descriptor size wrong: %d > %d\n",
1354 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1358 lmv->tgts_size = 32U;
1359 OBD_ALLOC(lmv->tgts, sizeof(*lmv->tgts) * lmv->tgts_size);
1360 if (lmv->tgts == NULL)
1363 obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1364 lmv->desc.ld_tgt_count = 0;
1365 lmv->desc.ld_active_tgt_count = 0;
1366 lmv->max_def_easize = 0;
1367 lmv->max_easize = 0;
1368 lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
1370 spin_lock_init(&lmv->lmv_lock);
1371 mutex_init(&lmv->lmv_init_mutex);
1373 #ifdef CONFIG_PROC_FS
1374 obd->obd_vars = lprocfs_lmv_obd_vars;
1375 lprocfs_obd_setup(obd);
1376 lprocfs_alloc_md_stats(obd, 0);
1377 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
1378 0444, &lmv_proc_target_fops, obd);
1380 CWARN("%s: error adding LMV target_obd file: rc = %d\n",
1383 rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1384 LUSTRE_CLI_FLD_HASH_DHT);
1386 CERROR("Can't init FLD, err %d\n", rc);
1396 static int lmv_cleanup(struct obd_device *obd)
1398 struct lmv_obd *lmv = &obd->u.lmv;
1401 fld_client_fini(&lmv->lmv_fld);
1402 if (lmv->tgts != NULL) {
1404 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1405 if (lmv->tgts[i] == NULL)
1407 lmv_del_target(lmv, i);
1409 OBD_FREE(lmv->tgts, sizeof(*lmv->tgts) * lmv->tgts_size);
1415 static int lmv_process_config(struct obd_device *obd, size_t len, void *buf)
1417 struct lustre_cfg *lcfg = buf;
1418 struct obd_uuid obd_uuid;
1424 switch (lcfg->lcfg_command) {
1426 /* modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID
1427 * 2:0 3:1 4:lustre-MDT0000-mdc_UUID */
1428 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
1429 GOTO(out, rc = -EINVAL);
1431 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
1433 if (sscanf(lustre_cfg_buf(lcfg, 2), "%u", &index) != 1)
1434 GOTO(out, rc = -EINVAL);
1435 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
1436 GOTO(out, rc = -EINVAL);
1437 rc = lmv_add_target(obd, &obd_uuid, index, gen);
1440 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1441 GOTO(out, rc = -EINVAL);
1447 static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
1448 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1450 struct obd_device *obd = class_exp2obd(exp);
1451 struct lmv_obd *lmv = &obd->u.lmv;
1452 struct obd_statfs *temp;
1457 rc = lmv_check_connect(obd);
1461 OBD_ALLOC(temp, sizeof(*temp));
1465 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1466 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1469 rc = obd_statfs(env, lmv->tgts[i]->ltd_exp, temp,
1472 CERROR("can't stat MDS #%d (%s), error %d\n", i,
1473 lmv->tgts[i]->ltd_exp->exp_obd->obd_name,
1475 GOTO(out_free_temp, rc);
1480 /* If the statfs is from mount, it will needs
1481 * retrieve necessary information from MDT0.
1482 * i.e. mount does not need the merged osfs
1484 * And also clients can be mounted as long as
1485 * MDT0 is in service*/
1486 if (flags & OBD_STATFS_FOR_MDT0)
1487 GOTO(out_free_temp, rc);
1489 osfs->os_bavail += temp->os_bavail;
1490 osfs->os_blocks += temp->os_blocks;
1491 osfs->os_ffree += temp->os_ffree;
1492 osfs->os_files += temp->os_files;
1498 OBD_FREE(temp, sizeof(*temp));
1502 static int lmv_getstatus(struct obd_export *exp, struct lu_fid *fid)
1504 struct obd_device *obd = exp->exp_obd;
1505 struct lmv_obd *lmv = &obd->u.lmv;
1509 rc = lmv_check_connect(obd);
1513 rc = md_getstatus(lmv->tgts[0]->ltd_exp, fid);
1517 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1518 u64 valid, const char *name,
1519 const char *input, int input_size, int output_size,
1520 int flags, struct ptlrpc_request **request)
1522 struct obd_device *obd = exp->exp_obd;
1523 struct lmv_obd *lmv = &obd->u.lmv;
1524 struct lmv_tgt_desc *tgt;
1528 rc = lmv_check_connect(obd);
1532 tgt = lmv_find_target(lmv, fid);
1534 RETURN(PTR_ERR(tgt));
1536 rc = md_getxattr(tgt->ltd_exp, fid, valid, name, input,
1537 input_size, output_size, flags, request);
1542 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1543 u64 valid, const char *name,
1544 const char *input, int input_size, int output_size,
1545 int flags, __u32 suppgid,
1546 struct ptlrpc_request **request)
1548 struct obd_device *obd = exp->exp_obd;
1549 struct lmv_obd *lmv = &obd->u.lmv;
1550 struct lmv_tgt_desc *tgt;
1554 rc = lmv_check_connect(obd);
1558 tgt = lmv_find_target(lmv, fid);
1560 RETURN(PTR_ERR(tgt));
1562 rc = md_setxattr(tgt->ltd_exp, fid, valid, name, input,
1563 input_size, output_size, flags, suppgid,
1569 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1570 struct ptlrpc_request **request)
1572 struct obd_device *obd = exp->exp_obd;
1573 struct lmv_obd *lmv = &obd->u.lmv;
1574 struct lmv_tgt_desc *tgt;
1578 rc = lmv_check_connect(obd);
1582 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1584 RETURN(PTR_ERR(tgt));
1586 if (op_data->op_flags & MF_GET_MDT_IDX) {
1587 op_data->op_mds = tgt->ltd_idx;
1591 rc = md_getattr(tgt->ltd_exp, op_data, request);
1596 static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
1598 struct obd_device *obd = exp->exp_obd;
1599 struct lmv_obd *lmv = &obd->u.lmv;
1604 rc = lmv_check_connect(obd);
1608 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1611 * With DNE every object can have two locks in different namespaces:
1612 * lookup lock in space of MDT storing direntry and update/open lock in
1613 * space of MDT storing inode.
1615 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1616 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1618 md_null_inode(lmv->tgts[i]->ltd_exp, fid);
1624 static int lmv_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1625 ldlm_iterator_t it, void *data)
1627 struct obd_device *obd = exp->exp_obd;
1628 struct lmv_obd *lmv = &obd->u.lmv;
1634 rc = lmv_check_connect(obd);
1638 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1641 * With DNE every object can have two locks in different namespaces:
1642 * lookup lock in space of MDT storing direntry and update/open lock in
1643 * space of MDT storing inode. Try the MDT that the FID maps to first,
1644 * since this can be easily found, and only try others if that fails.
1646 for (i = 0, tgt = lmv_find_target_index(lmv, fid);
1647 i < lmv->desc.ld_tgt_count;
1648 i++, tgt = (tgt + 1) % lmv->desc.ld_tgt_count) {
1650 CDEBUG(D_HA, "%s: "DFID" is inaccessible: rc = %d\n",
1651 obd->obd_name, PFID(fid), tgt);
1655 if (lmv->tgts[tgt] == NULL ||
1656 lmv->tgts[tgt]->ltd_exp == NULL)
1659 rc = md_find_cbdata(lmv->tgts[tgt]->ltd_exp, fid, it, data);
1668 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1669 struct md_open_data *mod, struct ptlrpc_request **request)
1671 struct obd_device *obd = exp->exp_obd;
1672 struct lmv_obd *lmv = &obd->u.lmv;
1673 struct lmv_tgt_desc *tgt;
1677 rc = lmv_check_connect(obd);
1681 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1683 RETURN(PTR_ERR(tgt));
1685 CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1686 rc = md_close(tgt->ltd_exp, op_data, mod, request);
1691 * Choosing the MDT by name or FID in @op_data.
1692 * For non-striped directory, it will locate MDT by fid.
1693 * For striped-directory, it will locate MDT by name. And also
1694 * it will reset op_fid1 with the FID of the choosen stripe.
1696 struct lmv_tgt_desc *
1697 lmv_locate_target_for_name(struct lmv_obd *lmv, struct lmv_stripe_md *lsm,
1698 const char *name, int namelen, struct lu_fid *fid,
1701 struct lmv_tgt_desc *tgt;
1702 const struct lmv_oinfo *oinfo;
1704 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_NAME_HASH)) {
1705 if (cfs_fail_val >= lsm->lsm_md_stripe_count)
1706 RETURN(ERR_PTR(-EBADF));
1707 oinfo = &lsm->lsm_md_oinfo[cfs_fail_val];
1709 oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
1711 RETURN(ERR_CAST(oinfo));
1715 *fid = oinfo->lmo_fid;
1717 *mds = oinfo->lmo_mds;
1719 tgt = lmv_get_target(lmv, oinfo->lmo_mds, NULL);
1721 CDEBUG(D_INFO, "locate on mds %u "DFID"\n", oinfo->lmo_mds,
1722 PFID(&oinfo->lmo_fid));
1727 * Locate mds by fid or name
1729 * For striped directory (lsm != NULL), it will locate the stripe
1730 * by name hash (see lsm_name_to_stripe_info()). Note: if the hash_type
1731 * is unknown, it will return -EBADFD, and lmv_intent_lookup might need
1732 * walk through all of stripes to locate the entry.
1734 * For normal direcotry, it will locate MDS by FID directly.
1735 * \param[in] lmv LMV device
1736 * \param[in] op_data client MD stack parameters, name, namelen
1738 * \param[in] fid object FID used to locate MDS.
1740 * retval pointer to the lmv_tgt_desc if succeed.
1741 * ERR_PTR(errno) if failed.
1743 struct lmv_tgt_desc*
1744 lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1747 struct lmv_stripe_md *lsm = op_data->op_mea1;
1748 struct lmv_tgt_desc *tgt;
1750 /* During creating VOLATILE file, it should honor the mdt
1751 * index if the file under striped dir is being restored, see
1753 if (op_data->op_bias & MDS_CREATE_VOLATILE &&
1754 (int)op_data->op_mds != -1 && lsm != NULL) {
1756 tgt = lmv_get_target(lmv, op_data->op_mds, NULL);
1760 /* refill the right parent fid */
1761 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1762 struct lmv_oinfo *oinfo;
1764 oinfo = &lsm->lsm_md_oinfo[i];
1765 if (oinfo->lmo_mds == op_data->op_mds) {
1766 *fid = oinfo->lmo_fid;
1771 /* Hmm, can not find the stripe by mdt_index(op_mds) */
1772 if (i == lsm->lsm_md_stripe_count)
1773 tgt = ERR_PTR(-EINVAL);
1778 if (lsm == NULL || op_data->op_namelen == 0) {
1779 tgt = lmv_find_target(lmv, fid);
1783 op_data->op_mds = tgt->ltd_idx;
1787 return lmv_locate_target_for_name(lmv, lsm, op_data->op_name,
1788 op_data->op_namelen, fid,
1792 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1793 const void *data, size_t datalen, umode_t mode, uid_t uid,
1794 gid_t gid, cfs_cap_t cap_effective, __u64 rdev,
1795 struct ptlrpc_request **request)
1797 struct obd_device *obd = exp->exp_obd;
1798 struct lmv_obd *lmv = &obd->u.lmv;
1799 struct lmv_tgt_desc *tgt;
1803 rc = lmv_check_connect(obd);
1807 if (!lmv->desc.ld_active_tgt_count)
1810 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1812 RETURN(PTR_ERR(tgt));
1814 CDEBUG(D_INODE, "CREATE name '%.*s' on "DFID" -> mds #%x\n",
1815 (int)op_data->op_namelen, op_data->op_name,
1816 PFID(&op_data->op_fid1), op_data->op_mds);
1818 rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
1821 if (exp_connect_flags(exp) & OBD_CONNECT_DIR_STRIPE) {
1822 /* Send the create request to the MDT where the object
1823 * will be located */
1824 tgt = lmv_find_target(lmv, &op_data->op_fid2);
1826 RETURN(PTR_ERR(tgt));
1828 op_data->op_mds = tgt->ltd_idx;
1830 CDEBUG(D_CONFIG, "Server doesn't support striped dirs\n");
1833 CDEBUG(D_INODE, "CREATE obj "DFID" -> mds #%x\n",
1834 PFID(&op_data->op_fid2), op_data->op_mds);
1836 op_data->op_flags |= MF_MDC_CANCEL_FID1;
1837 rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1838 cap_effective, rdev, request);
1840 if (*request == NULL)
1842 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1848 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1849 const union ldlm_policy_data *policy,
1850 struct lookup_intent *it, struct md_op_data *op_data,
1851 struct lustre_handle *lockh, __u64 extra_lock_flags)
1853 struct obd_device *obd = exp->exp_obd;
1854 struct lmv_obd *lmv = &obd->u.lmv;
1855 struct lmv_tgt_desc *tgt;
1859 rc = lmv_check_connect(obd);
1863 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
1864 LL_IT2STR(it), PFID(&op_data->op_fid1));
1866 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1868 RETURN(PTR_ERR(tgt));
1870 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%u\n",
1871 LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
1873 rc = md_enqueue(tgt->ltd_exp, einfo, policy, it, op_data, lockh,
1880 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1881 struct ptlrpc_request **preq)
1883 struct ptlrpc_request *req = NULL;
1884 struct obd_device *obd = exp->exp_obd;
1885 struct lmv_obd *lmv = &obd->u.lmv;
1886 struct lmv_tgt_desc *tgt;
1887 struct mdt_body *body;
1891 rc = lmv_check_connect(obd);
1895 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1897 RETURN(PTR_ERR(tgt));
1899 CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" -> mds #%d\n",
1900 (int)op_data->op_namelen, op_data->op_name,
1901 PFID(&op_data->op_fid1), tgt->ltd_idx);
1903 rc = md_getattr_name(tgt->ltd_exp, op_data, preq);
1907 body = req_capsule_server_get(&(*preq)->rq_pill, &RMF_MDT_BODY);
1908 LASSERT(body != NULL);
1910 if (body->mbo_valid & OBD_MD_MDS) {
1911 struct lu_fid rid = body->mbo_fid1;
1912 CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1915 tgt = lmv_find_target(lmv, &rid);
1917 ptlrpc_req_finished(*preq);
1919 RETURN(PTR_ERR(tgt));
1922 op_data->op_fid1 = rid;
1923 op_data->op_valid |= OBD_MD_FLCROSSREF;
1924 op_data->op_namelen = 0;
1925 op_data->op_name = NULL;
1926 rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
1927 ptlrpc_req_finished(*preq);
1934 #define md_op_data_fid(op_data, fl) \
1935 (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1936 fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1937 fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1938 fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1941 static int lmv_early_cancel(struct obd_export *exp, struct lmv_tgt_desc *tgt,
1942 struct md_op_data *op_data,
1943 __u32 op_tgt, ldlm_mode_t mode, int bits, int flag)
1945 struct lu_fid *fid = md_op_data_fid(op_data, flag);
1946 struct obd_device *obd = exp->exp_obd;
1947 struct lmv_obd *lmv = &obd->u.lmv;
1948 ldlm_policy_data_t policy = {{ 0 }};
1952 if (!fid_is_sane(fid))
1956 tgt = lmv_find_target(lmv, fid);
1958 RETURN(PTR_ERR(tgt));
1961 if (tgt->ltd_idx != op_tgt) {
1962 CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1963 policy.l_inodebits.bits = bits;
1964 rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1965 mode, LCF_ASYNC, NULL);
1968 "EARLY_CANCEL skip operation target %d on "DFID"\n",
1970 op_data->op_flags |= flag;
1978 * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1981 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1982 struct ptlrpc_request **request)
1984 struct obd_device *obd = exp->exp_obd;
1985 struct lmv_obd *lmv = &obd->u.lmv;
1986 struct lmv_tgt_desc *tgt;
1990 rc = lmv_check_connect(obd);
1994 LASSERT(op_data->op_namelen != 0);
1996 CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
1997 PFID(&op_data->op_fid2), (int)op_data->op_namelen,
1998 op_data->op_name, PFID(&op_data->op_fid1));
2000 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2001 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2002 op_data->op_cap = cfs_curproc_cap_pack();
2003 if (op_data->op_mea2 != NULL) {
2004 struct lmv_stripe_md *lsm = op_data->op_mea2;
2005 const struct lmv_oinfo *oinfo;
2007 oinfo = lsm_name_to_stripe_info(lsm, op_data->op_name,
2008 op_data->op_namelen);
2010 RETURN(PTR_ERR(oinfo));
2012 op_data->op_fid2 = oinfo->lmo_fid;
2015 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
2017 RETURN(PTR_ERR(tgt));
2020 * Cancel UPDATE lock on child (fid1).
2022 op_data->op_flags |= MF_MDC_CANCEL_FID2;
2023 rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_idx, LCK_EX,
2024 MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2028 rc = md_link(tgt->ltd_exp, op_data, request);
2033 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
2034 const char *old, size_t oldlen,
2035 const char *new, size_t newlen,
2036 struct ptlrpc_request **request)
2038 struct obd_device *obd = exp->exp_obd;
2039 struct lmv_obd *lmv = &obd->u.lmv;
2040 struct lmv_tgt_desc *src_tgt;
2041 struct lmv_tgt_desc *tgt_tgt;
2042 struct obd_export *target_exp;
2043 struct mdt_body *body;
2047 LASSERT(oldlen != 0);
2049 CDEBUG(D_INODE, "RENAME %.*s in "DFID":%d to %.*s in "DFID":%d\n",
2050 (int)oldlen, old, PFID(&op_data->op_fid1),
2051 op_data->op_mea1 ? op_data->op_mea1->lsm_md_stripe_count : 0,
2052 (int)newlen, new, PFID(&op_data->op_fid2),
2053 op_data->op_mea2 ? op_data->op_mea2->lsm_md_stripe_count : 0);
2055 rc = lmv_check_connect(obd);
2059 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2060 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2061 op_data->op_cap = cfs_curproc_cap_pack();
2062 if (op_data->op_cli_flags & CLI_MIGRATE) {
2063 LASSERTF(fid_is_sane(&op_data->op_fid3), "invalid FID "DFID"\n",
2064 PFID(&op_data->op_fid3));
2066 if (op_data->op_mea1 != NULL) {
2067 struct lmv_stripe_md *lsm = op_data->op_mea1;
2068 struct lmv_tgt_desc *tmp;
2070 /* Fix the parent fid for striped dir */
2071 tmp = lmv_locate_target_for_name(lmv, lsm, old,
2076 RETURN(PTR_ERR(tmp));
2079 rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
2083 src_tgt = lmv_find_target(lmv, &op_data->op_fid3);
2084 if (IS_ERR(src_tgt))
2085 RETURN(PTR_ERR(src_tgt));
2087 target_exp = src_tgt->ltd_exp;
2089 if (op_data->op_mea1 != NULL) {
2090 struct lmv_stripe_md *lsm = op_data->op_mea1;
2092 src_tgt = lmv_locate_target_for_name(lmv, lsm, old,
2097 src_tgt = lmv_find_target(lmv, &op_data->op_fid1);
2099 if (IS_ERR(src_tgt))
2100 RETURN(PTR_ERR(src_tgt));
2103 if (op_data->op_mea2 != NULL) {
2104 struct lmv_stripe_md *lsm = op_data->op_mea2;
2106 tgt_tgt = lmv_locate_target_for_name(lmv, lsm, new,
2111 tgt_tgt = lmv_find_target(lmv, &op_data->op_fid2);
2114 if (IS_ERR(tgt_tgt))
2115 RETURN(PTR_ERR(tgt_tgt));
2117 target_exp = tgt_tgt->ltd_exp;
2121 * LOOKUP lock on src child (fid3) should also be cancelled for
2122 * src_tgt in mdc_rename.
2124 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2127 * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
2130 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
2131 LCK_EX, MDS_INODELOCK_UPDATE,
2132 MF_MDC_CANCEL_FID2);
2137 * Cancel LOOKUP locks on source child (fid3) for parent tgt_tgt.
2139 if (fid_is_sane(&op_data->op_fid3)) {
2140 struct lmv_tgt_desc *tgt;
2142 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2144 RETURN(PTR_ERR(tgt));
2146 /* Cancel LOOKUP lock on its parent */
2147 rc = lmv_early_cancel(exp, tgt, op_data, src_tgt->ltd_idx,
2148 LCK_EX, MDS_INODELOCK_LOOKUP,
2149 MF_MDC_CANCEL_FID3);
2153 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
2154 LCK_EX, MDS_INODELOCK_FULL,
2155 MF_MDC_CANCEL_FID3);
2162 * Cancel all the locks on tgt child (fid4).
2164 if (fid_is_sane(&op_data->op_fid4)) {
2165 struct lmv_tgt_desc *tgt;
2167 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
2168 LCK_EX, MDS_INODELOCK_FULL,
2169 MF_MDC_CANCEL_FID4);
2173 tgt = lmv_find_target(lmv, &op_data->op_fid4);
2175 RETURN(PTR_ERR(tgt));
2177 /* Since the target child might be destroyed, and it might
2178 * become orphan, and we can only check orphan on the local
2179 * MDT right now, so we send rename request to the MDT where
2180 * target child is located. If target child does not exist,
2181 * then it will send the request to the target parent */
2182 target_exp = tgt->ltd_exp;
2185 rc = md_rename(target_exp, op_data, old, oldlen, new, newlen,
2188 if (rc != 0 && rc != -EXDEV)
2191 body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2195 /* Not cross-ref case, just get out of here. */
2196 if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2199 CDEBUG(D_INODE, "%s: try rename to another MDT for "DFID"\n",
2200 exp->exp_obd->obd_name, PFID(&body->mbo_fid1));
2202 op_data->op_fid4 = body->mbo_fid1;
2203 ptlrpc_req_finished(*request);
2208 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2209 void *ea, size_t ealen, struct ptlrpc_request **request)
2211 struct obd_device *obd = exp->exp_obd;
2212 struct lmv_obd *lmv = &obd->u.lmv;
2213 struct lmv_tgt_desc *tgt;
2217 rc = lmv_check_connect(obd);
2221 CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x\n",
2222 PFID(&op_data->op_fid1), op_data->op_attr.ia_valid);
2224 op_data->op_flags |= MF_MDC_CANCEL_FID1;
2225 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2227 RETURN(PTR_ERR(tgt));
2229 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, request);
2234 static int lmv_fsync(struct obd_export *exp, const struct lu_fid *fid,
2235 struct ptlrpc_request **request)
2237 struct obd_device *obd = exp->exp_obd;
2238 struct lmv_obd *lmv = &obd->u.lmv;
2239 struct lmv_tgt_desc *tgt;
2243 rc = lmv_check_connect(obd);
2247 tgt = lmv_find_target(lmv, fid);
2249 RETURN(PTR_ERR(tgt));
2251 rc = md_fsync(tgt->ltd_exp, fid, request);
2256 * Get current minimum entry from striped directory
2258 * This function will search the dir entry, whose hash value is the
2259 * closest(>=) to @hash_offset, from all of sub-stripes, and it is
2260 * only being called for striped directory.
2262 * \param[in] exp export of LMV
2263 * \param[in] op_data parameters transferred beween client MD stack
2264 * stripe_information will be included in this
2266 * \param[in] cb_op ldlm callback being used in enqueue in
2268 * \param[in] hash_offset the hash value, which is used to locate
2269 * minum(closet) dir entry
2270 * \param[in|out] stripe_offset the caller use this to indicate the stripe
2271 * index of last entry, so to avoid hash conflict
2272 * between stripes. It will also be used to
2273 * return the stripe index of current dir entry.
2274 * \param[in|out] entp the minum entry and it also is being used
2275 * to input the last dir entry to resolve the
2278 * \param[out] ppage the page which holds the minum entry
2280 * \retval = 0 get the entry successfully
2281 * negative errno (< 0) does not get the entry
2283 static int lmv_get_min_striped_entry(struct obd_export *exp,
2284 struct md_op_data *op_data,
2285 struct md_callback *cb_op,
2286 __u64 hash_offset, int *stripe_offset,
2287 struct lu_dirent **entp,
2288 struct page **ppage)
2290 struct obd_device *obd = exp->exp_obd;
2291 struct lmv_obd *lmv = &obd->u.lmv;
2292 struct lmv_stripe_md *lsm = op_data->op_mea1;
2293 struct lmv_tgt_desc *tgt;
2295 struct lu_dirent *min_ent = NULL;
2296 struct page *min_page = NULL;
2302 stripe_count = lsm->lsm_md_stripe_count;
2303 for (i = 0; i < stripe_count; i++) {
2304 struct lu_dirent *ent = NULL;
2305 struct page *page = NULL;
2306 struct lu_dirpage *dp;
2307 __u64 stripe_hash = hash_offset;
2309 tgt = lmv_get_target(lmv, lsm->lsm_md_oinfo[i].lmo_mds, NULL);
2311 GOTO(out, rc = PTR_ERR(tgt));
2313 /* op_data will be shared by each stripe, so we need
2314 * reset these value for each stripe */
2315 op_data->op_fid1 = lsm->lsm_md_oinfo[i].lmo_fid;
2316 op_data->op_fid2 = lsm->lsm_md_oinfo[i].lmo_fid;
2317 op_data->op_data = lsm->lsm_md_oinfo[i].lmo_root;
2319 rc = md_read_page(tgt->ltd_exp, op_data, cb_op, stripe_hash,
2324 dp = page_address(page);
2325 for (ent = lu_dirent_start(dp); ent != NULL;
2326 ent = lu_dirent_next(ent)) {
2327 /* Skip dummy entry */
2328 if (le16_to_cpu(ent->lde_namelen) == 0)
2331 if (le64_to_cpu(ent->lde_hash) < hash_offset)
2334 if (le64_to_cpu(ent->lde_hash) == hash_offset &&
2335 (*entp == ent || i < *stripe_offset))
2338 /* skip . and .. for other stripes */
2340 (strncmp(ent->lde_name, ".",
2341 le16_to_cpu(ent->lde_namelen)) == 0 ||
2342 strncmp(ent->lde_name, "..",
2343 le16_to_cpu(ent->lde_namelen)) == 0))
2349 stripe_hash = le64_to_cpu(dp->ldp_hash_end);
2352 page_cache_release(page);
2355 /* reach the end of current stripe, go to next stripe */
2356 if (stripe_hash == MDS_DIR_END_OFF)
2362 if (min_ent != NULL) {
2363 if (le64_to_cpu(min_ent->lde_hash) >
2364 le64_to_cpu(ent->lde_hash)) {
2367 page_cache_release(min_page);
2372 page_cache_release(page);
2383 if (*ppage != NULL) {
2385 page_cache_release(*ppage);
2387 *stripe_offset = min_idx;
2394 * Build dir entry page from a striped directory
2396 * This function gets one entry by @offset from a striped directory. It will
2397 * read entries from all of stripes, and choose one closest to the required
2398 * offset(&offset). A few notes
2399 * 1. skip . and .. for non-zero stripes, because there can only have one .
2400 * and .. in a directory.
2401 * 2. op_data will be shared by all of stripes, instead of allocating new
2402 * one, so need to restore before reusing.
2403 * 3. release the entry page if that is not being chosen.
2405 * \param[in] exp obd export refer to LMV
2406 * \param[in] op_data hold those MD parameters of read_entry
2407 * \param[in] cb_op ldlm callback being used in enqueue in mdc_read_entry
2408 * \param[out] ldp the entry being read
2409 * \param[out] ppage the page holding the entry. Note: because the entry
2410 * will be accessed in upper layer, so we need hold the
2411 * page until the usages of entry is finished, see
2412 * ll_dir_entry_next.
2414 * retval =0 if get entry successfully
2415 * <0 cannot get entry
2417 static int lmv_read_striped_page(struct obd_export *exp,
2418 struct md_op_data *op_data,
2419 struct md_callback *cb_op,
2420 __u64 offset, struct page **ppage)
2422 struct obd_device *obd = exp->exp_obd;
2423 struct lu_fid master_fid = op_data->op_fid1;
2424 struct inode *master_inode = op_data->op_data;
2425 __u64 hash_offset = offset;
2426 struct lu_dirpage *dp;
2427 struct page *min_ent_page = NULL;
2428 struct page *ent_page = NULL;
2429 struct lu_dirent *ent;
2432 struct lu_dirent *min_ent = NULL;
2433 struct lu_dirent *last_ent;
2438 rc = lmv_check_connect(obd);
2442 /* Allocate a page and read entries from all of stripes and fill
2443 * the page by hash order */
2444 ent_page = alloc_page(GFP_KERNEL);
2445 if (ent_page == NULL)
2448 /* Initialize the entry page */
2449 dp = kmap(ent_page);
2450 memset(dp, 0, sizeof(*dp));
2451 dp->ldp_hash_start = cpu_to_le64(offset);
2452 dp->ldp_flags |= LDF_COLLIDE;
2455 left_bytes = PAGE_CACHE_SIZE - sizeof(*dp);
2461 /* Find the minum entry from all sub-stripes */
2462 rc = lmv_get_min_striped_entry(exp, op_data, cb_op, hash_offset,
2468 /* If it can not get minum entry, it means it already reaches
2469 * the end of this directory */
2470 if (min_ent == NULL) {
2471 last_ent->lde_reclen = 0;
2472 hash_offset = MDS_DIR_END_OFF;
2476 ent_size = le16_to_cpu(min_ent->lde_reclen);
2478 /* the last entry lde_reclen is 0, but it might not
2479 * the end of this entry of this temporay entry */
2481 ent_size = lu_dirent_calc_size(
2482 le16_to_cpu(min_ent->lde_namelen),
2483 le32_to_cpu(min_ent->lde_attrs));
2484 if (ent_size > left_bytes) {
2485 last_ent->lde_reclen = cpu_to_le16(0);
2486 hash_offset = le64_to_cpu(min_ent->lde_hash);
2490 memcpy(ent, min_ent, ent_size);
2492 /* Replace . with master FID and Replace .. with the parent FID
2493 * of master object */
2494 if (strncmp(ent->lde_name, ".",
2495 le16_to_cpu(ent->lde_namelen)) == 0 &&
2496 le16_to_cpu(ent->lde_namelen) == 1)
2497 fid_cpu_to_le(&ent->lde_fid, &master_fid);
2498 else if (strncmp(ent->lde_name, "..",
2499 le16_to_cpu(ent->lde_namelen)) == 0 &&
2500 le16_to_cpu(ent->lde_namelen) == 2)
2501 fid_cpu_to_le(&ent->lde_fid, &op_data->op_fid3);
2503 left_bytes -= ent_size;
2504 ent->lde_reclen = cpu_to_le16(ent_size);
2506 ent = (void *)ent + ent_size;
2507 hash_offset = le64_to_cpu(min_ent->lde_hash);
2508 if (hash_offset == MDS_DIR_END_OFF) {
2509 last_ent->lde_reclen = 0;
2514 if (min_ent_page != NULL) {
2515 kunmap(min_ent_page);
2516 page_cache_release(min_ent_page);
2519 if (unlikely(rc != 0)) {
2520 __free_page(ent_page);
2524 dp->ldp_flags |= LDF_EMPTY;
2525 dp->ldp_flags = cpu_to_le32(dp->ldp_flags);
2526 dp->ldp_hash_end = cpu_to_le64(hash_offset);
2529 /* We do not want to allocate md_op_data during each
2530 * dir entry reading, so op_data will be shared by every stripe,
2531 * then we need to restore it back to original value before
2532 * return to the upper layer */
2533 op_data->op_fid1 = master_fid;
2534 op_data->op_fid2 = master_fid;
2535 op_data->op_data = master_inode;
2542 int lmv_read_page(struct obd_export *exp, struct md_op_data *op_data,
2543 struct md_callback *cb_op, __u64 offset,
2544 struct page **ppage)
2546 struct obd_device *obd = exp->exp_obd;
2547 struct lmv_obd *lmv = &obd->u.lmv;
2548 struct lmv_stripe_md *lsm = op_data->op_mea1;
2549 struct lmv_tgt_desc *tgt;
2553 rc = lmv_check_connect(obd);
2557 if (unlikely(lsm != NULL)) {
2558 rc = lmv_read_striped_page(exp, op_data, cb_op, offset, ppage);
2562 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2564 RETURN(PTR_ERR(tgt));
2566 rc = md_read_page(tgt->ltd_exp, op_data, cb_op, offset, ppage);
2572 * Unlink a file/directory
2574 * Unlink a file or directory under the parent dir. The unlink request
2575 * usually will be sent to the MDT where the child is located, but if
2576 * the client does not have the child FID then request will be sent to the
2577 * MDT where the parent is located.
2579 * If the parent is a striped directory then it also needs to locate which
2580 * stripe the name of the child is located, and replace the parent FID
2581 * (@op->op_fid1) with the stripe FID. Note: if the stripe is unknown,
2582 * it will walk through all of sub-stripes until the child is being
2585 * \param[in] exp export refer to LMV
2586 * \param[in] op_data different parameters transferred beween client
2587 * MD stacks, name, namelen, FIDs etc.
2588 * op_fid1 is the parent FID, op_fid2 is the child
2590 * \param[out] request point to the request of unlink.
2592 * retval 0 if succeed
2593 * negative errno if failed.
2595 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2596 struct ptlrpc_request **request)
2598 struct obd_device *obd = exp->exp_obd;
2599 struct lmv_obd *lmv = &obd->u.lmv;
2600 struct lmv_tgt_desc *tgt = NULL;
2601 struct lmv_tgt_desc *parent_tgt = NULL;
2602 struct mdt_body *body;
2604 int stripe_index = 0;
2605 struct lmv_stripe_md *lsm = op_data->op_mea1;
2608 rc = lmv_check_connect(obd);
2612 /* For striped dir, we need to locate the parent as well */
2614 struct lmv_tgt_desc *tmp;
2616 LASSERT(op_data->op_name != NULL &&
2617 op_data->op_namelen != 0);
2619 tmp = lmv_locate_target_for_name(lmv, lsm,
2621 op_data->op_namelen,
2625 /* return -EBADFD means unknown hash type, might
2626 * need try all sub-stripe here */
2627 if (IS_ERR(tmp) && PTR_ERR(tmp) != -EBADFD)
2628 RETURN(PTR_ERR(tmp));
2630 /* Note: both migrating dir and unknown hash dir need to
2631 * try all of sub-stripes, so we need start search the
2632 * name from stripe 0, but migrating dir is already handled
2633 * inside lmv_locate_target_for_name(), so we only check
2634 * unknown hash type directory here */
2635 if (!lmv_is_known_hash_type(lsm->lsm_md_hash_type)) {
2636 struct lmv_oinfo *oinfo;
2638 oinfo = &lsm->lsm_md_oinfo[stripe_index];
2640 op_data->op_fid1 = oinfo->lmo_fid;
2641 op_data->op_mds = oinfo->lmo_mds;
2646 /* Send unlink requests to the MDT where the child is located */
2647 if (likely(!fid_is_zero(&op_data->op_fid2)))
2648 tgt = lmv_find_target(lmv, &op_data->op_fid2);
2649 else if (lsm != NULL)
2650 tgt = lmv_get_target(lmv, op_data->op_mds, NULL);
2652 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
2655 RETURN(PTR_ERR(tgt));
2657 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2658 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2659 op_data->op_cap = cfs_curproc_cap_pack();
2662 * If child's fid is given, cancel unused locks for it if it is from
2663 * another export than parent.
2665 * LOOKUP lock for child (fid3) should also be cancelled on parent
2666 * tgt_tgt in mdc_unlink().
2668 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2671 * Cancel FULL locks on child (fid3).
2673 parent_tgt = lmv_find_target(lmv, &op_data->op_fid1);
2674 if (IS_ERR(parent_tgt))
2675 RETURN(PTR_ERR(parent_tgt));
2677 if (parent_tgt != tgt) {
2678 rc = lmv_early_cancel(exp, parent_tgt, op_data, tgt->ltd_idx,
2679 LCK_EX, MDS_INODELOCK_LOOKUP,
2680 MF_MDC_CANCEL_FID3);
2683 rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_idx, LCK_EX,
2684 MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2688 CDEBUG(D_INODE, "unlink with fid="DFID"/"DFID" -> mds #%u\n",
2689 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2), tgt->ltd_idx);
2691 rc = md_unlink(tgt->ltd_exp, op_data, request);
2692 if (rc != 0 && rc != -EREMOTE && rc != -ENOENT)
2695 /* Try next stripe if it is needed. */
2696 if (rc == -ENOENT && lsm != NULL && lmv_need_try_all_stripes(lsm)) {
2697 struct lmv_oinfo *oinfo;
2700 if (stripe_index >= lsm->lsm_md_stripe_count)
2703 oinfo = &lsm->lsm_md_oinfo[stripe_index];
2705 op_data->op_fid1 = oinfo->lmo_fid;
2706 op_data->op_mds = oinfo->lmo_mds;
2708 ptlrpc_req_finished(*request);
2711 goto try_next_stripe;
2714 body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2718 /* Not cross-ref case, just get out of here. */
2719 if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2722 CDEBUG(D_INODE, "%s: try unlink to another MDT for "DFID"\n",
2723 exp->exp_obd->obd_name, PFID(&body->mbo_fid1));
2725 /* This is a remote object, try remote MDT, Note: it may
2726 * try more than 1 time here, Considering following case
2727 * /mnt/lustre is root on MDT0, remote1 is on MDT1
2728 * 1. Initially A does not know where remote1 is, it send
2729 * unlink RPC to MDT0, MDT0 return -EREMOTE, it will
2730 * resend unlink RPC to MDT1 (retry 1st time).
2732 * 2. During the unlink RPC in flight,
2733 * client B mv /mnt/lustre/remote1 /mnt/lustre/remote2
2734 * and create new remote1, but on MDT0
2736 * 3. MDT1 get unlink RPC(from A), then do remote lock on
2737 * /mnt/lustre, then lookup get fid of remote1, and find
2738 * it is remote dir again, and replay -EREMOTE again.
2740 * 4. Then A will resend unlink RPC to MDT0. (retry 2nd times).
2742 * In theory, it might try unlimited time here, but it should
2743 * be very rare case. */
2744 op_data->op_fid2 = body->mbo_fid1;
2745 ptlrpc_req_finished(*request);
2751 static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2753 struct lmv_obd *lmv = &obd->u.lmv;
2757 case OBD_CLEANUP_EARLY:
2758 /* XXX: here should be calling obd_precleanup() down to
2761 case OBD_CLEANUP_EXPORTS:
2762 fld_client_proc_fini(&lmv->lmv_fld);
2763 lprocfs_obd_cleanup(obd);
2764 lprocfs_free_md_stats(obd);
2773 * Get by key a value associated with a LMV device.
2775 * Dispatch request to lower-layer devices as needed.
2777 * \param[in] env execution environment for this thread
2778 * \param[in] exp export for the LMV device
2779 * \param[in] keylen length of key identifier
2780 * \param[in] key identifier of key to get value for
2781 * \param[in] vallen size of \a val
2782 * \param[out] val pointer to storage location for value
2783 * \param[in] lsm optional striping metadata of object
2785 * \retval 0 on success
2786 * \retval negative negated errno on failure
2788 static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
2789 __u32 keylen, void *key, __u32 *vallen, void *val)
2791 struct obd_device *obd;
2792 struct lmv_obd *lmv;
2796 obd = class_exp2obd(exp);
2798 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2799 exp->exp_handle.h_cookie);
2804 if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2807 rc = lmv_check_connect(obd);
2811 LASSERT(*vallen == sizeof(__u32));
2812 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2813 struct lmv_tgt_desc *tgt = lmv->tgts[i];
2815 * All tgts should be connected when this gets called.
2817 if (tgt == NULL || tgt->ltd_exp == NULL)
2820 if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
2825 } else if (KEY_IS(KEY_MAX_EASIZE) ||
2826 KEY_IS(KEY_DEFAULT_EASIZE) ||
2827 KEY_IS(KEY_CONN_DATA)) {
2828 rc = lmv_check_connect(obd);
2833 * Forwarding this request to first MDS, it should know LOV
2836 rc = obd_get_info(env, lmv->tgts[0]->ltd_exp, keylen, key,
2838 if (!rc && KEY_IS(KEY_CONN_DATA))
2839 exp->exp_connect_data = *(struct obd_connect_data *)val;
2841 } else if (KEY_IS(KEY_TGT_COUNT)) {
2842 *((int *)val) = lmv->desc.ld_tgt_count;
2846 CDEBUG(D_IOCTL, "Invalid key\n");
2851 * Asynchronously set by key a value associated with a LMV device.
2853 * Dispatch request to lower-layer devices as needed.
2855 * \param[in] env execution environment for this thread
2856 * \param[in] exp export for the LMV device
2857 * \param[in] keylen length of key identifier
2858 * \param[in] key identifier of key to store value for
2859 * \param[in] vallen size of value to store
2860 * \param[in] val pointer to data to be stored
2861 * \param[in] set optional list of related ptlrpc requests
2863 * \retval 0 on success
2864 * \retval negative negated errno on failure
2866 int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
2867 __u32 keylen, void *key, __u32 vallen, void *val,
2868 struct ptlrpc_request_set *set)
2870 struct lmv_tgt_desc *tgt = NULL;
2871 struct obd_device *obd;
2872 struct lmv_obd *lmv;
2876 obd = class_exp2obd(exp);
2878 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2879 exp->exp_handle.h_cookie);
2884 if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX) ||
2885 KEY_IS(KEY_DEFAULT_EASIZE)) {
2888 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2891 if (tgt == NULL || tgt->ltd_exp == NULL)
2894 err = obd_set_info_async(env, tgt->ltd_exp,
2895 keylen, key, vallen, val, set);
2906 static int lmv_unpack_md_v1(struct obd_export *exp, struct lmv_stripe_md *lsm,
2907 const struct lmv_mds_md_v1 *lmm1)
2909 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2916 lsm->lsm_md_magic = le32_to_cpu(lmm1->lmv_magic);
2917 lsm->lsm_md_stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
2918 lsm->lsm_md_master_mdt_index = le32_to_cpu(lmm1->lmv_master_mdt_index);
2919 if (OBD_FAIL_CHECK(OBD_FAIL_UNKNOWN_LMV_STRIPE))
2920 lsm->lsm_md_hash_type = LMV_HASH_TYPE_UNKNOWN;
2922 lsm->lsm_md_hash_type = le32_to_cpu(lmm1->lmv_hash_type);
2923 lsm->lsm_md_layout_version = le32_to_cpu(lmm1->lmv_layout_version);
2924 cplen = strlcpy(lsm->lsm_md_pool_name, lmm1->lmv_pool_name,
2925 sizeof(lsm->lsm_md_pool_name));
2927 if (cplen >= sizeof(lsm->lsm_md_pool_name))
2930 CDEBUG(D_INFO, "unpack lsm count %d, master %d hash_type %d"
2931 "layout_version %d\n", lsm->lsm_md_stripe_count,
2932 lsm->lsm_md_master_mdt_index, lsm->lsm_md_hash_type,
2933 lsm->lsm_md_layout_version);
2935 stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
2936 for (i = 0; i < stripe_count; i++) {
2937 fid_le_to_cpu(&lsm->lsm_md_oinfo[i].lmo_fid,
2938 &lmm1->lmv_stripe_fids[i]);
2939 rc = lmv_fld_lookup(lmv, &lsm->lsm_md_oinfo[i].lmo_fid,
2940 &lsm->lsm_md_oinfo[i].lmo_mds);
2943 CDEBUG(D_INFO, "unpack fid #%d "DFID"\n", i,
2944 PFID(&lsm->lsm_md_oinfo[i].lmo_fid));
2950 static int lmv_unpackmd(struct obd_export *exp, struct lmv_stripe_md **lsmp,
2951 const union lmv_mds_md *lmm, size_t lmm_size)
2953 struct lmv_stripe_md *lsm;
2956 bool allocated = false;
2959 LASSERT(lsmp != NULL);
2963 if (lsm != NULL && lmm == NULL) {
2965 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
2966 /* For migrating inode, the master stripe and master
2967 * object will be the same, so do not need iput, see
2968 * ll_update_lsm_md */
2969 if (!(lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION &&
2970 i == 0) && lsm->lsm_md_oinfo[i].lmo_root != NULL)
2971 iput(lsm->lsm_md_oinfo[i].lmo_root);
2973 lsm_size = lmv_stripe_md_size(lsm->lsm_md_stripe_count);
2974 OBD_FREE(lsm, lsm_size);
2979 if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_STRIPE)
2983 if (le32_to_cpu(lmm->lmv_magic) != LMV_MAGIC_V1 &&
2984 le32_to_cpu(lmm->lmv_magic) != LMV_USER_MAGIC) {
2985 CERROR("%s: invalid lmv magic %x: rc = %d\n",
2986 exp->exp_obd->obd_name, le32_to_cpu(lmm->lmv_magic),
2991 if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_V1)
2992 lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
2995 * Unpack default dirstripe(lmv_user_md) to lmv_stripe_md,
2996 * stripecount should be 0 then.
2998 lsm_size = lmv_stripe_md_size(0);
3000 lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
3002 OBD_ALLOC(lsm, lsm_size);
3009 switch (le32_to_cpu(lmm->lmv_magic)) {
3011 rc = lmv_unpack_md_v1(exp, lsm, &lmm->lmv_md_v1);
3014 CERROR("%s: unrecognized magic %x\n", exp->exp_obd->obd_name,
3015 le32_to_cpu(lmm->lmv_magic));
3020 if (rc != 0 && allocated) {
3021 OBD_FREE(lsm, lsm_size);
3028 void lmv_free_memmd(struct lmv_stripe_md *lsm)
3030 lmv_unpackmd(NULL, &lsm, NULL, 0);
3032 EXPORT_SYMBOL(lmv_free_memmd);
3034 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
3035 ldlm_policy_data_t *policy, ldlm_mode_t mode,
3036 ldlm_cancel_flags_t flags, void *opaque)
3038 struct obd_device *obd = exp->exp_obd;
3039 struct lmv_obd *lmv = &obd->u.lmv;
3045 LASSERT(fid != NULL);
3047 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3048 struct lmv_tgt_desc *tgt = lmv->tgts[i];
3050 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
3053 err = md_cancel_unused(tgt->ltd_exp, fid, policy, mode, flags,
3061 int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
3064 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3065 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3069 if (tgt == NULL || tgt->ltd_exp == NULL)
3071 rc = md_set_lock_data(tgt->ltd_exp, lockh, data, bits);
3075 ldlm_mode_t lmv_lock_match(struct obd_export *exp, __u64 flags,
3076 const struct lu_fid *fid, ldlm_type_t type,
3077 ldlm_policy_data_t *policy, ldlm_mode_t mode,
3078 struct lustre_handle *lockh)
3080 struct obd_device *obd = exp->exp_obd;
3081 struct lmv_obd *lmv = &obd->u.lmv;
3087 CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
3090 * With DNE every object can have two locks in different namespaces:
3091 * lookup lock in space of MDT storing direntry and update/open lock in
3092 * space of MDT storing inode. Try the MDT that the FID maps to first,
3093 * since this can be easily found, and only try others if that fails.
3095 for (i = 0, tgt = lmv_find_target_index(lmv, fid);
3096 i < lmv->desc.ld_tgt_count;
3097 i++, tgt = (tgt + 1) % lmv->desc.ld_tgt_count) {
3099 CDEBUG(D_HA, "%s: "DFID" is inaccessible: rc = %d\n",
3100 obd->obd_name, PFID(fid), tgt);
3104 if (lmv->tgts[tgt] == NULL ||
3105 lmv->tgts[tgt]->ltd_exp == NULL ||
3106 lmv->tgts[tgt]->ltd_active == 0)
3109 rc = md_lock_match(lmv->tgts[tgt]->ltd_exp, flags, fid,
3110 type, policy, mode, lockh);
3118 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
3119 struct obd_export *dt_exp, struct obd_export *md_exp,
3120 struct lustre_md *md)
3122 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3123 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3125 if (tgt == NULL || tgt->ltd_exp == NULL)
3128 return md_get_lustre_md(lmv->tgts[0]->ltd_exp, req, dt_exp, md_exp, md);
3131 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
3133 struct obd_device *obd = exp->exp_obd;
3134 struct lmv_obd *lmv = &obd->u.lmv;
3135 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3138 if (md->lmv != NULL) {
3139 lmv_free_memmd(md->lmv);
3142 if (tgt == NULL || tgt->ltd_exp == NULL)
3144 RETURN(md_free_lustre_md(lmv->tgts[0]->ltd_exp, md));
3147 int lmv_set_open_replay_data(struct obd_export *exp,
3148 struct obd_client_handle *och,
3149 struct lookup_intent *it)
3151 struct obd_device *obd = exp->exp_obd;
3152 struct lmv_obd *lmv = &obd->u.lmv;
3153 struct lmv_tgt_desc *tgt;
3156 tgt = lmv_find_target(lmv, &och->och_fid);
3158 RETURN(PTR_ERR(tgt));
3160 RETURN(md_set_open_replay_data(tgt->ltd_exp, och, it));
3163 int lmv_clear_open_replay_data(struct obd_export *exp,
3164 struct obd_client_handle *och)
3166 struct obd_device *obd = exp->exp_obd;
3167 struct lmv_obd *lmv = &obd->u.lmv;
3168 struct lmv_tgt_desc *tgt;
3171 tgt = lmv_find_target(lmv, &och->och_fid);
3173 RETURN(PTR_ERR(tgt));
3175 RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
3178 static int lmv_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
3179 u32 suppgid, struct ptlrpc_request **request)
3181 struct obd_device *obd = exp->exp_obd;
3182 struct lmv_obd *lmv = &obd->u.lmv;
3183 struct lmv_tgt_desc *tgt;
3187 rc = lmv_check_connect(obd);
3191 tgt = lmv_find_target(lmv, fid);
3193 RETURN(PTR_ERR(tgt));
3195 rc = md_get_remote_perm(tgt->ltd_exp, fid, suppgid, request);
3199 int lmv_intent_getattr_async(struct obd_export *exp,
3200 struct md_enqueue_info *minfo,
3201 struct ldlm_enqueue_info *einfo)
3203 struct md_op_data *op_data = &minfo->mi_data;
3204 struct obd_device *obd = exp->exp_obd;
3205 struct lmv_obd *lmv = &obd->u.lmv;
3206 struct lmv_tgt_desc *tgt = NULL;
3210 rc = lmv_check_connect(obd);
3214 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
3216 RETURN(PTR_ERR(tgt));
3218 rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
3222 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
3223 struct lu_fid *fid, __u64 *bits)
3225 struct obd_device *obd = exp->exp_obd;
3226 struct lmv_obd *lmv = &obd->u.lmv;
3227 struct lmv_tgt_desc *tgt;
3231 rc = lmv_check_connect(obd);
3235 tgt = lmv_find_target(lmv, fid);
3237 RETURN(PTR_ERR(tgt));
3239 rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
3243 int lmv_get_fid_from_lsm(struct obd_export *exp,
3244 const struct lmv_stripe_md *lsm,
3245 const char *name, int namelen, struct lu_fid *fid)
3247 const struct lmv_oinfo *oinfo;
3249 LASSERT(lsm != NULL);
3250 oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
3252 return PTR_ERR(oinfo);
3254 *fid = oinfo->lmo_fid;
3260 * For lmv, only need to send request to master MDT, and the master MDT will
3261 * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
3262 * we directly fetch data from the slave MDTs.
3264 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
3265 struct obd_quotactl *oqctl)
3267 struct obd_device *obd = class_exp2obd(exp);
3268 struct lmv_obd *lmv = &obd->u.lmv;
3269 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3272 __u64 curspace, curinodes;
3276 tgt->ltd_exp == NULL ||
3278 lmv->desc.ld_tgt_count == 0) {
3279 CERROR("master lmv inactive\n");
3283 if (oqctl->qc_cmd != Q_GETOQUOTA) {
3284 rc = obd_quotactl(tgt->ltd_exp, oqctl);
3288 curspace = curinodes = 0;
3289 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3293 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
3296 err = obd_quotactl(tgt->ltd_exp, oqctl);
3298 CERROR("getquota on mdt %d failed. %d\n", i, err);
3302 curspace += oqctl->qc_dqblk.dqb_curspace;
3303 curinodes += oqctl->qc_dqblk.dqb_curinodes;
3306 oqctl->qc_dqblk.dqb_curspace = curspace;
3307 oqctl->qc_dqblk.dqb_curinodes = curinodes;
3312 static int lmv_merge_attr(struct obd_export *exp,
3313 const struct lmv_stripe_md *lsm,
3314 struct cl_attr *attr,
3315 ldlm_blocking_callback cb_blocking)
3320 rc = lmv_revalidate_slaves(exp, lsm, cb_blocking, 0);
3324 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
3325 struct inode *inode = lsm->lsm_md_oinfo[i].lmo_root;
3327 CDEBUG(D_INFO, ""DFID" size %llu, blocks %llu nlink %u,"
3328 " atime %lu ctime %lu, mtime %lu.\n",
3329 PFID(&lsm->lsm_md_oinfo[i].lmo_fid),
3330 i_size_read(inode), (unsigned long long)inode->i_blocks,
3331 inode->i_nlink, LTIME_S(inode->i_atime),
3332 LTIME_S(inode->i_ctime), LTIME_S(inode->i_mtime));
3334 /* for slave stripe, it needs to subtract nlink for . and .. */
3336 attr->cat_nlink += inode->i_nlink - 2;
3338 attr->cat_nlink = inode->i_nlink;
3340 attr->cat_size += i_size_read(inode);
3341 attr->cat_blocks += inode->i_blocks;
3343 if (attr->cat_atime < LTIME_S(inode->i_atime))
3344 attr->cat_atime = LTIME_S(inode->i_atime);
3346 if (attr->cat_ctime < LTIME_S(inode->i_ctime))
3347 attr->cat_ctime = LTIME_S(inode->i_ctime);
3349 if (attr->cat_mtime < LTIME_S(inode->i_mtime))
3350 attr->cat_mtime = LTIME_S(inode->i_mtime);
3355 struct obd_ops lmv_obd_ops = {
3356 .o_owner = THIS_MODULE,
3357 .o_setup = lmv_setup,
3358 .o_cleanup = lmv_cleanup,
3359 .o_precleanup = lmv_precleanup,
3360 .o_process_config = lmv_process_config,
3361 .o_connect = lmv_connect,
3362 .o_disconnect = lmv_disconnect,
3363 .o_statfs = lmv_statfs,
3364 .o_get_info = lmv_get_info,
3365 .o_set_info_async = lmv_set_info_async,
3366 .o_notify = lmv_notify,
3367 .o_get_uuid = lmv_get_uuid,
3368 .o_iocontrol = lmv_iocontrol,
3369 .o_quotactl = lmv_quotactl
3372 struct md_ops lmv_md_ops = {
3373 .m_getstatus = lmv_getstatus,
3374 .m_null_inode = lmv_null_inode,
3375 .m_find_cbdata = lmv_find_cbdata,
3376 .m_close = lmv_close,
3377 .m_create = lmv_create,
3378 .m_enqueue = lmv_enqueue,
3379 .m_getattr = lmv_getattr,
3380 .m_getxattr = lmv_getxattr,
3381 .m_getattr_name = lmv_getattr_name,
3382 .m_intent_lock = lmv_intent_lock,
3384 .m_rename = lmv_rename,
3385 .m_setattr = lmv_setattr,
3386 .m_setxattr = lmv_setxattr,
3387 .m_fsync = lmv_fsync,
3388 .m_read_page = lmv_read_page,
3389 .m_unlink = lmv_unlink,
3390 .m_init_ea_size = lmv_init_ea_size,
3391 .m_cancel_unused = lmv_cancel_unused,
3392 .m_set_lock_data = lmv_set_lock_data,
3393 .m_lock_match = lmv_lock_match,
3394 .m_get_lustre_md = lmv_get_lustre_md,
3395 .m_free_lustre_md = lmv_free_lustre_md,
3396 .m_merge_attr = lmv_merge_attr,
3397 .m_set_open_replay_data = lmv_set_open_replay_data,
3398 .m_clear_open_replay_data = lmv_clear_open_replay_data,
3399 .m_get_remote_perm = lmv_get_remote_perm,
3400 .m_intent_getattr_async = lmv_intent_getattr_async,
3401 .m_revalidate_lock = lmv_revalidate_lock,
3402 .m_get_fid_from_lsm = lmv_get_fid_from_lsm,
3403 .m_unpackmd = lmv_unpackmd,
3406 int __init lmv_init(void)
3408 return class_register_type(&lmv_obd_ops, &lmv_md_ops, true, NULL,
3409 LUSTRE_LMV_NAME, NULL);
3412 static void lmv_exit(void)
3414 class_unregister_type(LUSTRE_LMV_NAME);
3417 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3418 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
3419 MODULE_LICENSE("GPL");
3421 module_init(lmv_init);
3422 module_exit(lmv_exit);