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, 2015, 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);
75 tgt->ltd_exp->exp_obd->obd_inactive = !activate;
81 * -EINVAL : UUID can't be found in the LMV's target list
82 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
83 * -EBADF : The UUID is found, but the OBD of the wrong type (!)
85 static int lmv_set_mdc_active(struct lmv_obd *lmv,
86 const struct obd_uuid *uuid,
89 struct lmv_tgt_desc *tgt = NULL;
90 struct obd_device *obd;
95 CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
96 lmv, uuid->uuid, activate);
98 spin_lock(&lmv->lmv_lock);
99 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
101 if (tgt == NULL || tgt->ltd_exp == NULL)
104 CDEBUG(D_INFO, "Target idx %d is %s conn "LPX64"\n", i,
105 tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
107 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
111 if (i == lmv->desc.ld_tgt_count)
112 GOTO(out_lmv_lock, rc = -EINVAL);
114 obd = class_exp2obd(tgt->ltd_exp);
116 GOTO(out_lmv_lock, rc = -ENOTCONN);
118 CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
119 obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
120 obd->obd_type->typ_name, i);
121 LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
123 if (tgt->ltd_active == activate) {
124 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
125 activate ? "" : "in");
126 GOTO(out_lmv_lock, rc);
129 CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
130 activate ? "" : "in");
131 lmv_activate_target(lmv, tgt, activate);
135 spin_unlock(&lmv->lmv_lock);
139 struct obd_uuid *lmv_get_uuid(struct obd_export *exp)
141 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
142 struct lmv_tgt_desc *tgt = lmv->tgts[0];
144 return (tgt == NULL) ? NULL : obd_get_uuid(tgt->ltd_exp);
147 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
148 enum obd_notify_event ev, void *data)
150 struct obd_connect_data *conn_data;
151 struct lmv_obd *lmv = &obd->u.lmv;
152 struct obd_uuid *uuid;
156 if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
157 CERROR("unexpected notification of %s %s!\n",
158 watched->obd_type->typ_name,
163 uuid = &watched->u.cli.cl_target_uuid;
164 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
166 * Set MDC as active before notifying the observer, so the
167 * observer can use the MDC normally.
169 rc = lmv_set_mdc_active(lmv, uuid,
170 ev == OBD_NOTIFY_ACTIVE);
172 CERROR("%sactivation of %s failed: %d\n",
173 ev == OBD_NOTIFY_ACTIVE ? "" : "de",
177 } else if (ev == OBD_NOTIFY_OCD) {
178 conn_data = &watched->u.cli.cl_import->imp_connect_data;
180 * XXX: Make sure that ocd_connect_flags from all targets are
181 * the same. Otherwise one of MDTs runs wrong version or
182 * something like this. --umka
184 obd->obd_self_export->exp_connect_data = *conn_data;
187 else if (ev == OBD_NOTIFY_DISCON) {
189 * For disconnect event, flush fld cache for failout MDS case.
191 fld_client_flush(&lmv->lmv_fld);
195 * Pass the notification up the chain.
197 if (obd->obd_observer)
198 rc = obd_notify(obd->obd_observer, watched, ev, data);
204 * This is fake connect function. Its purpose is to initialize lmv and say
205 * caller that everything is okay. Real connection will be performed later.
207 static int lmv_connect(const struct lu_env *env,
208 struct obd_export **exp, struct obd_device *obd,
209 struct obd_uuid *cluuid, struct obd_connect_data *data,
212 struct lmv_obd *lmv = &obd->u.lmv;
213 struct lustre_handle conn = { 0 };
218 * We don't want to actually do the underlying connections more than
219 * once, so keep track.
222 if (lmv->refcount > 1) {
227 rc = class_connect(&conn, obd, cluuid);
229 CERROR("class_connection() returned %d\n", rc);
233 *exp = class_conn2export(&conn);
234 class_export_get(*exp);
238 lmv->cluuid = *cluuid;
241 lmv->conn_data = *data;
243 if (lmv->targets_proc_entry == NULL) {
244 lmv->targets_proc_entry = lprocfs_register("target_obds",
247 if (IS_ERR(lmv->targets_proc_entry)) {
248 CERROR("%s: cannot register "
249 "/proc/fs/lustre/%s/%s/target_obds\n",
250 obd->obd_name, obd->obd_type->typ_name,
252 lmv->targets_proc_entry = NULL;
257 * All real clients should perform actual connection right away, because
258 * it is possible, that LMV will not have opportunity to connect targets
259 * and MDC stuff will be called directly, for instance while reading
260 * ../mdc/../kbytesfree procfs file, etc.
262 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_REAL))
263 rc = lmv_check_connect(obd);
265 if (rc && lmv->targets_proc_entry != NULL)
266 lprocfs_remove(&lmv->targets_proc_entry);
270 static int lmv_init_ea_size(struct obd_export *exp, __u32 easize,
273 struct obd_device *obd = exp->exp_obd;
274 struct lmv_obd *lmv = &obd->u.lmv;
280 if (lmv->max_easize < easize) {
281 lmv->max_easize = easize;
284 if (lmv->max_def_easize < def_easize) {
285 lmv->max_def_easize = def_easize;
292 if (lmv->connected == 0)
295 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
296 struct lmv_tgt_desc *tgt = lmv->tgts[i];
298 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active) {
299 CWARN("%s: NULL export for %d\n", obd->obd_name, i);
303 rc = md_init_ea_size(tgt->ltd_exp, easize, def_easize);
305 CERROR("%s: obd_init_ea_size() failed on MDT target %d:"
306 " rc = %d\n", obd->obd_name, i, rc);
313 #define MAX_STRING_SIZE 128
315 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
317 struct lmv_obd *lmv = &obd->u.lmv;
318 struct obd_uuid *cluuid = &lmv->cluuid;
319 struct obd_uuid lmv_mdc_uuid = { "LMV_MDC_UUID" };
320 struct obd_device *mdc_obd;
321 struct obd_export *mdc_exp;
322 struct lu_fld_target target;
326 mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
329 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
333 CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
334 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
335 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
338 if (!mdc_obd->obd_set_up) {
339 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
343 rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
344 &lmv->conn_data, NULL);
346 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
351 * Init fid sequence client for this mdc and add new fld target.
353 rc = obd_fid_init(mdc_obd, mdc_exp, LUSTRE_SEQ_METADATA);
357 target.ft_srv = NULL;
358 target.ft_exp = mdc_exp;
359 target.ft_idx = tgt->ltd_idx;
361 fld_client_add_target(&lmv->lmv_fld, &target);
363 rc = obd_register_observer(mdc_obd, obd);
365 obd_disconnect(mdc_exp);
366 CERROR("target %s register_observer error %d\n",
367 tgt->ltd_uuid.uuid, rc);
371 if (obd->obd_observer) {
373 * Tell the observer about the new target.
375 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
377 (void *)(tgt - lmv->tgts[0]));
379 obd_disconnect(mdc_exp);
385 tgt->ltd_exp = mdc_exp;
386 lmv->desc.ld_active_tgt_count++;
388 md_init_ea_size(tgt->ltd_exp, lmv->max_easize, lmv->max_def_easize);
390 CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
391 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
392 atomic_read(&obd->obd_refcount));
394 if (lmv->targets_proc_entry != NULL) {
395 struct proc_dir_entry *mdc_symlink;
397 LASSERT(mdc_obd->obd_type != NULL);
398 LASSERT(mdc_obd->obd_type->typ_name != NULL);
399 mdc_symlink = lprocfs_add_symlink(mdc_obd->obd_name,
400 lmv->targets_proc_entry,
402 mdc_obd->obd_type->typ_name,
404 if (mdc_symlink == NULL) {
405 CERROR("cannot register LMV target "
406 "/proc/fs/lustre/%s/%s/target_obds/%s\n",
407 obd->obd_type->typ_name, obd->obd_name,
414 static void lmv_del_target(struct lmv_obd *lmv, int index)
416 if (lmv->tgts[index] == NULL)
419 OBD_FREE_PTR(lmv->tgts[index]);
420 lmv->tgts[index] = NULL;
424 static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
425 __u32 index, int gen)
427 struct obd_device *mdc_obd;
428 struct lmv_obd *lmv = &obd->u.lmv;
429 struct lmv_tgt_desc *tgt;
430 int orig_tgt_count = 0;
434 CDEBUG(D_CONFIG, "Target uuid: %s. index %d\n", uuidp->uuid, index);
435 mdc_obd = class_find_client_obd(uuidp, LUSTRE_MDC_NAME,
438 CERROR("%s: Target %s not attached: rc = %d\n",
439 obd->obd_name, uuidp->uuid, -EINVAL);
443 mutex_lock(&lmv->lmv_init_mutex);
444 if ((index < lmv->tgts_size) && (lmv->tgts[index] != NULL)) {
445 tgt = lmv->tgts[index];
446 CERROR("%s: UUID %s already assigned at LOV target index %d:"
447 " rc = %d\n", obd->obd_name,
448 obd_uuid2str(&tgt->ltd_uuid), index, -EEXIST);
449 mutex_unlock(&lmv->lmv_init_mutex);
453 if (index >= lmv->tgts_size) {
454 /* We need to reallocate the lmv target array. */
455 struct lmv_tgt_desc **newtgts, **old = NULL;
459 while (newsize < index + 1)
460 newsize = newsize << 1;
461 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
462 if (newtgts == NULL) {
463 mutex_unlock(&lmv->lmv_init_mutex);
467 if (lmv->tgts_size) {
468 memcpy(newtgts, lmv->tgts,
469 sizeof(*newtgts) * lmv->tgts_size);
471 oldsize = lmv->tgts_size;
475 lmv->tgts_size = newsize;
478 OBD_FREE(old, sizeof(*old) * oldsize);
480 CDEBUG(D_CONFIG, "tgts: %p size: %d\n", lmv->tgts,
486 mutex_unlock(&lmv->lmv_init_mutex);
490 mutex_init(&tgt->ltd_fid_mutex);
491 tgt->ltd_idx = index;
492 tgt->ltd_uuid = *uuidp;
494 lmv->tgts[index] = tgt;
495 if (index >= lmv->desc.ld_tgt_count) {
496 orig_tgt_count = lmv->desc.ld_tgt_count;
497 lmv->desc.ld_tgt_count = index + 1;
500 if (lmv->connected == 0) {
501 /* lmv_check_connect() will connect this target. */
502 mutex_unlock(&lmv->lmv_init_mutex);
506 /* Otherwise let's connect it ourselves */
507 mutex_unlock(&lmv->lmv_init_mutex);
508 rc = lmv_connect_mdc(obd, tgt);
510 spin_lock(&lmv->lmv_lock);
511 if (lmv->desc.ld_tgt_count == index + 1)
512 lmv->desc.ld_tgt_count = orig_tgt_count;
513 memset(tgt, 0, sizeof(*tgt));
514 spin_unlock(&lmv->lmv_lock);
516 int easize = sizeof(struct lmv_stripe_md) +
517 lmv->desc.ld_tgt_count * sizeof(struct lu_fid);
518 lmv_init_ea_size(obd->obd_self_export, easize, 0);
524 int lmv_check_connect(struct obd_device *obd)
526 struct lmv_obd *lmv = &obd->u.lmv;
527 struct lmv_tgt_desc *tgt;
536 mutex_lock(&lmv->lmv_init_mutex);
537 if (lmv->connected) {
538 mutex_unlock(&lmv->lmv_init_mutex);
542 if (lmv->desc.ld_tgt_count == 0) {
543 mutex_unlock(&lmv->lmv_init_mutex);
544 CERROR("%s: no targets configured.\n", obd->obd_name);
548 LASSERT(lmv->tgts != NULL);
550 if (lmv->tgts[0] == NULL) {
551 mutex_unlock(&lmv->lmv_init_mutex);
552 CERROR("%s: no target configured for index 0.\n",
557 CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
558 lmv->cluuid.uuid, obd->obd_name);
560 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
564 rc = lmv_connect_mdc(obd, tgt);
569 class_export_put(lmv->exp);
571 easize = lmv_mds_md_size(lmv->desc.ld_tgt_count, LMV_MAGIC);
572 lmv_init_ea_size(obd->obd_self_export, easize, 0);
573 mutex_unlock(&lmv->lmv_init_mutex);
584 --lmv->desc.ld_active_tgt_count;
585 rc2 = obd_disconnect(tgt->ltd_exp);
587 CERROR("LMV target %s disconnect on "
588 "MDC idx %d: error %d\n",
589 tgt->ltd_uuid.uuid, i, rc2);
593 class_disconnect(lmv->exp);
594 mutex_unlock(&lmv->lmv_init_mutex);
598 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
600 struct lmv_obd *lmv = &obd->u.lmv;
601 struct obd_device *mdc_obd;
605 LASSERT(tgt != NULL);
606 LASSERT(obd != NULL);
608 mdc_obd = class_exp2obd(tgt->ltd_exp);
611 mdc_obd->obd_force = obd->obd_force;
612 mdc_obd->obd_fail = obd->obd_fail;
613 mdc_obd->obd_no_recov = obd->obd_no_recov;
615 if (lmv->targets_proc_entry != NULL)
616 lprocfs_remove_proc_entry(mdc_obd->obd_name,
617 lmv->targets_proc_entry);
620 rc = obd_fid_fini(tgt->ltd_exp->exp_obd);
622 CERROR("Can't finanize fids factory\n");
624 CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
625 tgt->ltd_exp->exp_obd->obd_name,
626 tgt->ltd_exp->exp_obd->obd_uuid.uuid);
628 obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
629 rc = obd_disconnect(tgt->ltd_exp);
631 if (tgt->ltd_active) {
632 CERROR("Target %s disconnect error %d\n",
633 tgt->ltd_uuid.uuid, rc);
637 lmv_activate_target(lmv, tgt, 0);
642 static int lmv_disconnect(struct obd_export *exp)
644 struct obd_device *obd = class_exp2obd(exp);
645 struct lmv_obd *lmv = &obd->u.lmv;
654 * Only disconnect the underlying layers on the final disconnect.
657 if (lmv->refcount != 0)
660 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
661 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
664 lmv_disconnect_mdc(obd, lmv->tgts[i]);
667 if (lmv->targets_proc_entry != NULL)
668 lprocfs_remove(&lmv->targets_proc_entry);
670 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
671 obd->obd_type->typ_name, obd->obd_name);
675 * This is the case when no real connection is established by
676 * lmv_check_connect().
679 class_export_put(exp);
680 rc = class_disconnect(exp);
681 if (lmv->refcount == 0)
686 static int lmv_fid2path(struct obd_export *exp, int len, void *karg,
689 struct obd_device *obddev = class_exp2obd(exp);
690 struct lmv_obd *lmv = &obddev->u.lmv;
691 struct getinfo_fid2path *gf;
692 struct lmv_tgt_desc *tgt;
693 struct getinfo_fid2path *remote_gf = NULL;
694 int remote_gf_size = 0;
697 gf = (struct getinfo_fid2path *)karg;
698 tgt = lmv_find_target(lmv, &gf->gf_fid);
700 RETURN(PTR_ERR(tgt));
703 rc = obd_iocontrol(OBD_IOC_FID2PATH, tgt->ltd_exp, len, gf, uarg);
704 if (rc != 0 && rc != -EREMOTE)
705 GOTO(out_fid2path, rc);
707 /* If remote_gf != NULL, it means just building the
708 * path on the remote MDT, copy this path segement to gf */
709 if (remote_gf != NULL) {
710 struct getinfo_fid2path *ori_gf;
713 ori_gf = (struct getinfo_fid2path *)karg;
714 if (strlen(ori_gf->gf_path) +
715 strlen(gf->gf_path) > ori_gf->gf_pathlen)
716 GOTO(out_fid2path, rc = -EOVERFLOW);
718 ptr = ori_gf->gf_path;
720 memmove(ptr + strlen(gf->gf_path) + 1, ptr,
721 strlen(ori_gf->gf_path));
723 strncpy(ptr, gf->gf_path, strlen(gf->gf_path));
724 ptr += strlen(gf->gf_path);
728 CDEBUG(D_INFO, "%s: get path %s "DFID" rec: "LPU64" ln: %u\n",
729 tgt->ltd_exp->exp_obd->obd_name,
730 gf->gf_path, PFID(&gf->gf_fid), gf->gf_recno,
734 GOTO(out_fid2path, rc);
736 /* sigh, has to go to another MDT to do path building further */
737 if (remote_gf == NULL) {
738 remote_gf_size = sizeof(*remote_gf) + PATH_MAX;
739 OBD_ALLOC(remote_gf, remote_gf_size);
740 if (remote_gf == NULL)
741 GOTO(out_fid2path, rc = -ENOMEM);
742 remote_gf->gf_pathlen = PATH_MAX;
745 if (!fid_is_sane(&gf->gf_fid)) {
746 CERROR("%s: invalid FID "DFID": rc = %d\n",
747 tgt->ltd_exp->exp_obd->obd_name,
748 PFID(&gf->gf_fid), -EINVAL);
749 GOTO(out_fid2path, rc = -EINVAL);
752 tgt = lmv_find_target(lmv, &gf->gf_fid);
754 GOTO(out_fid2path, rc = -EINVAL);
756 remote_gf->gf_fid = gf->gf_fid;
757 remote_gf->gf_recno = -1;
758 remote_gf->gf_linkno = -1;
759 memset(remote_gf->gf_path, 0, remote_gf->gf_pathlen);
761 goto repeat_fid2path;
764 if (remote_gf != NULL)
765 OBD_FREE(remote_gf, remote_gf_size);
769 static int lmv_hsm_req_count(struct lmv_obd *lmv,
770 const struct hsm_user_request *hur,
771 const struct lmv_tgt_desc *tgt_mds)
775 struct lmv_tgt_desc *curr_tgt;
777 /* count how many requests must be sent to the given target */
778 for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
779 curr_tgt = lmv_find_target(lmv, &hur->hur_user_item[i].hui_fid);
780 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid))
786 static void lmv_hsm_req_build(struct lmv_obd *lmv,
787 struct hsm_user_request *hur_in,
788 const struct lmv_tgt_desc *tgt_mds,
789 struct hsm_user_request *hur_out)
792 struct lmv_tgt_desc *curr_tgt;
794 /* build the hsm_user_request for the given target */
795 hur_out->hur_request = hur_in->hur_request;
797 for (i = 0; i < hur_in->hur_request.hr_itemcount; i++) {
798 curr_tgt = lmv_find_target(lmv,
799 &hur_in->hur_user_item[i].hui_fid);
800 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid)) {
801 hur_out->hur_user_item[nr_out] =
802 hur_in->hur_user_item[i];
806 hur_out->hur_request.hr_itemcount = nr_out;
807 memcpy(hur_data(hur_out), hur_data(hur_in),
808 hur_in->hur_request.hr_data_len);
811 static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len,
812 struct lustre_kernelcomm *lk, void *uarg)
818 /* unregister request (call from llapi_hsm_copytool_fini) */
819 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
820 struct lmv_tgt_desc *tgt = lmv->tgts[i];
822 if (tgt == NULL || tgt->ltd_exp == NULL)
824 /* best effort: try to clean as much as possible
825 * (continue on error) */
826 obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
829 /* Whatever the result, remove copytool from kuc groups.
830 * Unreached coordinators will get EPIPE on next requests
831 * and will unregister automatically.
833 rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group);
838 static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len,
839 struct lustre_kernelcomm *lk, void *uarg)
844 bool any_set = false;
845 struct kkuc_ct_data kcd = { 0 };
848 /* All or nothing: try to register to all MDS.
849 * In case of failure, unregister from previous MDS,
850 * except if it because of inactive target. */
851 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
852 struct lmv_tgt_desc *tgt = lmv->tgts[i];
854 if (tgt == NULL || tgt->ltd_exp == NULL)
856 err = obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
858 if (tgt->ltd_active) {
859 /* permanent error */
860 CERROR("%s: iocontrol MDC %s on MDT"
861 " idx %d cmd %x: err = %d\n",
862 class_exp2obd(lmv->exp)->obd_name,
863 tgt->ltd_uuid.uuid, i, cmd, err);
865 lk->lk_flags |= LK_FLG_STOP;
866 /* unregister from previous MDS */
867 for (j = 0; j < i; j++) {
869 if (tgt == NULL || tgt->ltd_exp == NULL)
871 obd_iocontrol(cmd, tgt->ltd_exp, len,
876 /* else: transient error.
877 * kuc will register to the missing MDT
885 /* no registration done: return error */
888 /* at least one registration done, with no failure */
889 filp = fget(lk->lk_wfd);
893 kcd.kcd_magic = KKUC_CT_DATA_MAGIC;
894 kcd.kcd_uuid = lmv->cluuid;
895 kcd.kcd_archive = lk->lk_data;
897 rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group,
908 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
909 int len, void *karg, void __user *uarg)
911 struct obd_device *obddev = class_exp2obd(exp);
912 struct lmv_obd *lmv = &obddev->u.lmv;
913 struct lmv_tgt_desc *tgt = NULL;
917 __u32 count = lmv->desc.ld_tgt_count;
924 case IOC_OBD_STATFS: {
925 struct obd_ioctl_data *data = karg;
926 struct obd_device *mdc_obd;
927 struct obd_statfs stat_buf = {0};
930 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
931 if ((index >= count))
934 tgt = lmv->tgts[index];
935 if (tgt == NULL || !tgt->ltd_active)
938 mdc_obd = class_exp2obd(tgt->ltd_exp);
943 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
944 min((int) data->ioc_plen2,
945 (int) sizeof(struct obd_uuid))))
948 rc = obd_statfs(NULL, tgt->ltd_exp, &stat_buf,
949 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
953 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
954 min((int) data->ioc_plen1,
955 (int) sizeof(stat_buf))))
959 case OBD_IOC_QUOTACTL: {
960 struct if_quotactl *qctl = karg;
961 struct obd_quotactl *oqctl;
963 if (qctl->qc_valid == QC_MDTIDX) {
964 if (count <= qctl->qc_idx)
967 tgt = lmv->tgts[qctl->qc_idx];
968 if (tgt == NULL || tgt->ltd_exp == NULL)
970 } else if (qctl->qc_valid == QC_UUID) {
971 for (i = 0; i < count; i++) {
975 if (!obd_uuid_equals(&tgt->ltd_uuid,
979 if (tgt->ltd_exp == NULL)
991 LASSERT(tgt != NULL && tgt->ltd_exp != NULL);
992 OBD_ALLOC_PTR(oqctl);
996 QCTL_COPY(oqctl, qctl);
997 rc = obd_quotactl(tgt->ltd_exp, oqctl);
999 QCTL_COPY(qctl, oqctl);
1000 qctl->qc_valid = QC_MDTIDX;
1001 qctl->obd_uuid = tgt->ltd_uuid;
1003 OBD_FREE_PTR(oqctl);
1006 case OBD_IOC_CHANGELOG_SEND:
1007 case OBD_IOC_CHANGELOG_CLEAR: {
1008 struct ioc_changelog *icc = karg;
1010 if (icc->icc_mdtindex >= count)
1013 tgt = lmv->tgts[icc->icc_mdtindex];
1014 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
1016 rc = obd_iocontrol(cmd, tgt->ltd_exp, sizeof(*icc), icc, NULL);
1019 case LL_IOC_GET_CONNECT_FLAGS: {
1021 if (tgt == NULL || tgt->ltd_exp == NULL)
1023 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1026 case LL_IOC_FID2MDTIDX: {
1027 struct lu_fid *fid = karg;
1030 rc = lmv_fld_lookup(lmv, fid, &mdt_index);
1034 /* Note: this is from llite(see ll_dir_ioctl()), @uarg does not
1035 * point to user space memory for FID2MDTIDX. */
1036 *(__u32 *)uarg = mdt_index;
1039 case OBD_IOC_FID2PATH: {
1040 rc = lmv_fid2path(exp, len, karg, uarg);
1043 case LL_IOC_HSM_STATE_GET:
1044 case LL_IOC_HSM_STATE_SET:
1045 case LL_IOC_HSM_ACTION: {
1046 struct md_op_data *op_data = karg;
1048 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1050 RETURN(PTR_ERR(tgt));
1052 if (tgt->ltd_exp == NULL)
1055 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1058 case LL_IOC_HSM_PROGRESS: {
1059 const struct hsm_progress_kernel *hpk = karg;
1061 tgt = lmv_find_target(lmv, &hpk->hpk_fid);
1063 RETURN(PTR_ERR(tgt));
1064 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1067 case LL_IOC_HSM_REQUEST: {
1068 struct hsm_user_request *hur = karg;
1069 unsigned int reqcount = hur->hur_request.hr_itemcount;
1074 /* if the request is about a single fid
1075 * or if there is a single MDS, no need to split
1077 if (reqcount == 1 || count == 1) {
1078 tgt = lmv_find_target(lmv,
1079 &hur->hur_user_item[0].hui_fid);
1081 RETURN(PTR_ERR(tgt));
1082 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1084 /* split fid list to their respective MDS */
1085 for (i = 0; i < count; i++) {
1086 unsigned int nr, reqlen;
1088 struct hsm_user_request *req;
1091 if (tgt == NULL || tgt->ltd_exp == NULL)
1094 nr = lmv_hsm_req_count(lmv, hur, tgt);
1095 if (nr == 0) /* nothing for this MDS */
1098 /* build a request with fids for this MDS */
1099 reqlen = offsetof(typeof(*hur),
1101 + hur->hur_request.hr_data_len;
1102 OBD_ALLOC_LARGE(req, reqlen);
1106 lmv_hsm_req_build(lmv, hur, tgt, req);
1108 rc1 = obd_iocontrol(cmd, tgt->ltd_exp, reqlen,
1110 if (rc1 != 0 && rc == 0)
1112 OBD_FREE_LARGE(req, reqlen);
1117 case LL_IOC_LOV_SWAP_LAYOUTS: {
1118 struct md_op_data *op_data = karg;
1119 struct lmv_tgt_desc *tgt1, *tgt2;
1121 tgt1 = lmv_find_target(lmv, &op_data->op_fid1);
1123 RETURN(PTR_ERR(tgt1));
1125 tgt2 = lmv_find_target(lmv, &op_data->op_fid2);
1127 RETURN(PTR_ERR(tgt2));
1129 if ((tgt1->ltd_exp == NULL) || (tgt2->ltd_exp == NULL))
1132 /* only files on same MDT can have their layouts swapped */
1133 if (tgt1->ltd_idx != tgt2->ltd_idx)
1136 rc = obd_iocontrol(cmd, tgt1->ltd_exp, len, karg, uarg);
1139 case LL_IOC_HSM_CT_START: {
1140 struct lustre_kernelcomm *lk = karg;
1141 if (lk->lk_flags & LK_FLG_STOP)
1142 rc = lmv_hsm_ct_unregister(lmv, cmd, len, lk, uarg);
1144 rc = lmv_hsm_ct_register(lmv, cmd, len, lk, uarg);
1148 for (i = 0; i < count; i++) {
1149 struct obd_device *mdc_obd;
1153 if (tgt == NULL || tgt->ltd_exp == NULL)
1155 /* ll_umount_begin() sets force flag but for lmv, not
1156 * mdc. Let's pass it through */
1157 mdc_obd = class_exp2obd(tgt->ltd_exp);
1158 mdc_obd->obd_force = obddev->obd_force;
1159 err = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1161 if (tgt->ltd_active) {
1162 CERROR("error: iocontrol MDC %s on MDT"
1163 " idx %d cmd %x: err = %d\n",
1164 tgt->ltd_uuid.uuid, i, cmd, err);
1178 static int lmv_all_chars_policy(int count, const char *name,
1189 static int lmv_nid_policy(struct lmv_obd *lmv)
1191 struct obd_import *imp;
1195 * XXX: To get nid we assume that underlying obd device is mdc.
1197 imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
1198 id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
1199 return id % lmv->desc.ld_tgt_count;
1202 static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1203 placement_policy_t placement)
1205 switch (placement) {
1206 case PLACEMENT_CHAR_POLICY:
1207 return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
1209 op_data->op_namelen);
1210 case PLACEMENT_NID_POLICY:
1211 return lmv_nid_policy(lmv);
1217 CERROR("Unsupported placement policy %x\n", placement);
1223 * This is _inode_ placement policy function (not name).
1225 static int lmv_placement_policy(struct obd_device *obd,
1226 struct md_op_data *op_data, u32 *mds)
1228 struct lmv_obd *lmv = &obd->u.lmv;
1231 LASSERT(mds != NULL);
1233 if (lmv->desc.ld_tgt_count == 1) {
1238 if (op_data->op_default_stripe_offset != -1) {
1239 *mds = op_data->op_default_stripe_offset;
1244 * If stripe_offset is provided during setdirstripe
1245 * (setdirstripe -i xx), xx MDS will be choosen.
1247 if (op_data->op_cli_flags & CLI_SET_MEA && op_data->op_data != NULL) {
1248 struct lmv_user_md *lum;
1250 lum = op_data->op_data;
1252 if (le32_to_cpu(lum->lum_stripe_offset) != (__u32)-1) {
1253 *mds = le32_to_cpu(lum->lum_stripe_offset);
1255 /* -1 means default, which will be in the same MDT with
1257 *mds = op_data->op_mds;
1258 lum->lum_stripe_offset = cpu_to_le32(op_data->op_mds);
1261 /* Allocate new fid on target according to operation type and
1262 * parent home mds. */
1263 *mds = op_data->op_mds;
1269 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds)
1271 struct lmv_tgt_desc *tgt;
1275 tgt = lmv_get_target(lmv, mds, NULL);
1277 RETURN(PTR_ERR(tgt));
1280 * New seq alloc and FLD setup should be atomic. Otherwise we may find
1281 * on server that seq in new allocated fid is not yet known.
1283 mutex_lock(&tgt->ltd_fid_mutex);
1285 if (tgt->ltd_active == 0 || tgt->ltd_exp == NULL)
1286 GOTO(out, rc = -ENODEV);
1289 * Asking underlying tgt layer to allocate new fid.
1291 rc = obd_fid_alloc(NULL, tgt->ltd_exp, fid, NULL);
1293 LASSERT(fid_is_sane(fid));
1299 mutex_unlock(&tgt->ltd_fid_mutex);
1303 int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
1304 struct lu_fid *fid, struct md_op_data *op_data)
1306 struct obd_device *obd = class_exp2obd(exp);
1307 struct lmv_obd *lmv = &obd->u.lmv;
1312 LASSERT(op_data != NULL);
1313 LASSERT(fid != NULL);
1315 rc = lmv_placement_policy(obd, op_data, &mds);
1317 CERROR("Can't get target for allocating fid, "
1322 rc = __lmv_fid_alloc(lmv, fid, mds);
1324 CERROR("Can't alloc new fid, rc %d\n", rc);
1331 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1333 struct lmv_obd *lmv = &obd->u.lmv;
1334 struct lmv_desc *desc;
1338 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1339 CERROR("LMV setup requires a descriptor\n");
1343 desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1344 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1345 CERROR("Lmv descriptor size wrong: %d > %d\n",
1346 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1350 lmv->tgts_size = 32U;
1351 OBD_ALLOC(lmv->tgts, sizeof(*lmv->tgts) * lmv->tgts_size);
1352 if (lmv->tgts == NULL)
1355 obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1356 lmv->desc.ld_tgt_count = 0;
1357 lmv->desc.ld_active_tgt_count = 0;
1358 lmv->max_def_easize = 0;
1359 lmv->max_easize = 0;
1360 lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
1362 spin_lock_init(&lmv->lmv_lock);
1363 mutex_init(&lmv->lmv_init_mutex);
1365 #ifdef CONFIG_PROC_FS
1366 obd->obd_vars = lprocfs_lmv_obd_vars;
1367 lprocfs_obd_setup(obd);
1368 lprocfs_alloc_md_stats(obd, 0);
1369 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
1370 0444, &lmv_proc_target_fops, obd);
1372 CWARN("%s: error adding LMV target_obd file: rc = %d\n",
1375 rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1376 LUSTRE_CLI_FLD_HASH_DHT);
1378 CERROR("Can't init FLD, err %d\n", rc);
1388 static int lmv_cleanup(struct obd_device *obd)
1390 struct lmv_obd *lmv = &obd->u.lmv;
1393 fld_client_fini(&lmv->lmv_fld);
1394 if (lmv->tgts != NULL) {
1396 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1397 if (lmv->tgts[i] == NULL)
1399 lmv_del_target(lmv, i);
1401 OBD_FREE(lmv->tgts, sizeof(*lmv->tgts) * lmv->tgts_size);
1407 static int lmv_process_config(struct obd_device *obd, size_t len, void *buf)
1409 struct lustre_cfg *lcfg = buf;
1410 struct obd_uuid obd_uuid;
1416 switch (lcfg->lcfg_command) {
1418 /* modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID
1419 * 2:0 3:1 4:lustre-MDT0000-mdc_UUID */
1420 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
1421 GOTO(out, rc = -EINVAL);
1423 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
1425 if (sscanf(lustre_cfg_buf(lcfg, 2), "%u", &index) != 1)
1426 GOTO(out, rc = -EINVAL);
1427 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
1428 GOTO(out, rc = -EINVAL);
1429 rc = lmv_add_target(obd, &obd_uuid, index, gen);
1432 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1433 GOTO(out, rc = -EINVAL);
1439 static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
1440 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1442 struct obd_device *obd = class_exp2obd(exp);
1443 struct lmv_obd *lmv = &obd->u.lmv;
1444 struct obd_statfs *temp;
1449 rc = lmv_check_connect(obd);
1453 OBD_ALLOC(temp, sizeof(*temp));
1457 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1458 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1461 rc = obd_statfs(env, lmv->tgts[i]->ltd_exp, temp,
1464 CERROR("can't stat MDS #%d (%s), error %d\n", i,
1465 lmv->tgts[i]->ltd_exp->exp_obd->obd_name,
1467 GOTO(out_free_temp, rc);
1472 /* If the statfs is from mount, it will needs
1473 * retrieve necessary information from MDT0.
1474 * i.e. mount does not need the merged osfs
1476 * And also clients can be mounted as long as
1477 * MDT0 is in service*/
1478 if (flags & OBD_STATFS_FOR_MDT0)
1479 GOTO(out_free_temp, rc);
1481 osfs->os_bavail += temp->os_bavail;
1482 osfs->os_blocks += temp->os_blocks;
1483 osfs->os_ffree += temp->os_ffree;
1484 osfs->os_files += temp->os_files;
1490 OBD_FREE(temp, sizeof(*temp));
1494 static int lmv_getstatus(struct obd_export *exp, struct lu_fid *fid)
1496 struct obd_device *obd = exp->exp_obd;
1497 struct lmv_obd *lmv = &obd->u.lmv;
1501 rc = lmv_check_connect(obd);
1505 rc = md_getstatus(lmv->tgts[0]->ltd_exp, fid);
1509 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1510 u64 valid, const char *name,
1511 const char *input, int input_size, int output_size,
1512 int flags, struct ptlrpc_request **request)
1514 struct obd_device *obd = exp->exp_obd;
1515 struct lmv_obd *lmv = &obd->u.lmv;
1516 struct lmv_tgt_desc *tgt;
1520 rc = lmv_check_connect(obd);
1524 tgt = lmv_find_target(lmv, fid);
1526 RETURN(PTR_ERR(tgt));
1528 rc = md_getxattr(tgt->ltd_exp, fid, valid, name, input,
1529 input_size, output_size, flags, request);
1534 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1535 u64 valid, const char *name,
1536 const char *input, int input_size, int output_size,
1537 int flags, __u32 suppgid,
1538 struct ptlrpc_request **request)
1540 struct obd_device *obd = exp->exp_obd;
1541 struct lmv_obd *lmv = &obd->u.lmv;
1542 struct lmv_tgt_desc *tgt;
1546 rc = lmv_check_connect(obd);
1550 tgt = lmv_find_target(lmv, fid);
1552 RETURN(PTR_ERR(tgt));
1554 rc = md_setxattr(tgt->ltd_exp, fid, valid, name, input,
1555 input_size, output_size, flags, suppgid,
1561 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1562 struct ptlrpc_request **request)
1564 struct obd_device *obd = exp->exp_obd;
1565 struct lmv_obd *lmv = &obd->u.lmv;
1566 struct lmv_tgt_desc *tgt;
1570 rc = lmv_check_connect(obd);
1574 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1576 RETURN(PTR_ERR(tgt));
1578 if (op_data->op_flags & MF_GET_MDT_IDX) {
1579 op_data->op_mds = tgt->ltd_idx;
1583 rc = md_getattr(tgt->ltd_exp, op_data, request);
1588 static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
1590 struct obd_device *obd = exp->exp_obd;
1591 struct lmv_obd *lmv = &obd->u.lmv;
1596 rc = lmv_check_connect(obd);
1600 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1603 * With DNE every object can have two locks in different namespaces:
1604 * lookup lock in space of MDT storing direntry and update/open lock in
1605 * space of MDT storing inode.
1607 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1608 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1610 md_null_inode(lmv->tgts[i]->ltd_exp, fid);
1616 static int lmv_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1617 ldlm_iterator_t it, void *data)
1619 struct obd_device *obd = exp->exp_obd;
1620 struct lmv_obd *lmv = &obd->u.lmv;
1626 rc = lmv_check_connect(obd);
1630 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1633 * With DNE every object can have two locks in different namespaces:
1634 * lookup lock in space of MDT storing direntry and update/open lock in
1635 * space of MDT storing inode. Try the MDT that the FID maps to first,
1636 * since this can be easily found, and only try others if that fails.
1638 for (i = 0, tgt = lmv_find_target_index(lmv, fid);
1639 i < lmv->desc.ld_tgt_count;
1640 i++, tgt = (tgt + 1) % lmv->desc.ld_tgt_count) {
1642 CDEBUG(D_HA, "%s: "DFID" is inaccessible: rc = %d\n",
1643 obd->obd_name, PFID(fid), tgt);
1647 if (lmv->tgts[tgt] == NULL ||
1648 lmv->tgts[tgt]->ltd_exp == NULL)
1651 rc = md_find_cbdata(lmv->tgts[tgt]->ltd_exp, fid, it, data);
1660 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1661 struct md_open_data *mod, struct ptlrpc_request **request)
1663 struct obd_device *obd = exp->exp_obd;
1664 struct lmv_obd *lmv = &obd->u.lmv;
1665 struct lmv_tgt_desc *tgt;
1669 rc = lmv_check_connect(obd);
1673 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1675 RETURN(PTR_ERR(tgt));
1677 CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1678 rc = md_close(tgt->ltd_exp, op_data, mod, request);
1683 * Choosing the MDT by name or FID in @op_data.
1684 * For non-striped directory, it will locate MDT by fid.
1685 * For striped-directory, it will locate MDT by name. And also
1686 * it will reset op_fid1 with the FID of the choosen stripe.
1688 struct lmv_tgt_desc *
1689 lmv_locate_target_for_name(struct lmv_obd *lmv, struct lmv_stripe_md *lsm,
1690 const char *name, int namelen, struct lu_fid *fid,
1693 struct lmv_tgt_desc *tgt;
1694 const struct lmv_oinfo *oinfo;
1696 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_NAME_HASH)) {
1697 if (cfs_fail_val >= lsm->lsm_md_stripe_count)
1698 RETURN(ERR_PTR(-EBADF));
1699 oinfo = &lsm->lsm_md_oinfo[cfs_fail_val];
1701 oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
1703 RETURN(ERR_CAST(oinfo));
1707 *fid = oinfo->lmo_fid;
1709 *mds = oinfo->lmo_mds;
1711 tgt = lmv_get_target(lmv, oinfo->lmo_mds, NULL);
1713 CDEBUG(D_INFO, "locate on mds %u "DFID"\n", oinfo->lmo_mds,
1714 PFID(&oinfo->lmo_fid));
1719 * Locate mds by fid or name
1721 * For striped directory (lsm != NULL), it will locate the stripe
1722 * by name hash (see lsm_name_to_stripe_info()). Note: if the hash_type
1723 * is unknown, it will return -EBADFD, and lmv_intent_lookup might need
1724 * walk through all of stripes to locate the entry.
1726 * For normal direcotry, it will locate MDS by FID directly.
1727 * \param[in] lmv LMV device
1728 * \param[in] op_data client MD stack parameters, name, namelen
1730 * \param[in] fid object FID used to locate MDS.
1732 * retval pointer to the lmv_tgt_desc if succeed.
1733 * ERR_PTR(errno) if failed.
1735 struct lmv_tgt_desc*
1736 lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1739 struct lmv_stripe_md *lsm = op_data->op_mea1;
1740 struct lmv_tgt_desc *tgt;
1742 /* During creating VOLATILE file, it should honor the mdt
1743 * index if the file under striped dir is being restored, see
1745 if (op_data->op_bias & MDS_CREATE_VOLATILE &&
1746 (int)op_data->op_mds != -1) {
1748 tgt = lmv_get_target(lmv, op_data->op_mds, NULL);
1753 /* refill the right parent fid */
1754 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1755 struct lmv_oinfo *oinfo;
1757 oinfo = &lsm->lsm_md_oinfo[i];
1758 if (oinfo->lmo_mds == op_data->op_mds) {
1759 *fid = oinfo->lmo_fid;
1764 if (i == lsm->lsm_md_stripe_count)
1765 *fid = lsm->lsm_md_oinfo[0].lmo_fid;
1771 if (lsm == NULL || op_data->op_namelen == 0) {
1772 tgt = lmv_find_target(lmv, fid);
1776 op_data->op_mds = tgt->ltd_idx;
1780 return lmv_locate_target_for_name(lmv, lsm, op_data->op_name,
1781 op_data->op_namelen, fid,
1785 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1786 const void *data, size_t datalen, umode_t mode, uid_t uid,
1787 gid_t gid, cfs_cap_t cap_effective, __u64 rdev,
1788 struct ptlrpc_request **request)
1790 struct obd_device *obd = exp->exp_obd;
1791 struct lmv_obd *lmv = &obd->u.lmv;
1792 struct lmv_tgt_desc *tgt;
1796 rc = lmv_check_connect(obd);
1800 if (!lmv->desc.ld_active_tgt_count)
1803 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1805 RETURN(PTR_ERR(tgt));
1807 CDEBUG(D_INODE, "CREATE name '%.*s' on "DFID" -> mds #%x\n",
1808 (int)op_data->op_namelen, op_data->op_name,
1809 PFID(&op_data->op_fid1), op_data->op_mds);
1811 rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
1814 if (exp_connect_flags(exp) & OBD_CONNECT_DIR_STRIPE) {
1815 /* Send the create request to the MDT where the object
1816 * will be located */
1817 tgt = lmv_find_target(lmv, &op_data->op_fid2);
1819 RETURN(PTR_ERR(tgt));
1821 op_data->op_mds = tgt->ltd_idx;
1823 CDEBUG(D_CONFIG, "Server doesn't support striped dirs\n");
1826 CDEBUG(D_INODE, "CREATE obj "DFID" -> mds #%x\n",
1827 PFID(&op_data->op_fid2), op_data->op_mds);
1829 op_data->op_flags |= MF_MDC_CANCEL_FID1;
1830 rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1831 cap_effective, rdev, request);
1833 if (*request == NULL)
1835 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1841 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1842 const union ldlm_policy_data *policy,
1843 struct lookup_intent *it, struct md_op_data *op_data,
1844 struct lustre_handle *lockh, __u64 extra_lock_flags)
1846 struct obd_device *obd = exp->exp_obd;
1847 struct lmv_obd *lmv = &obd->u.lmv;
1848 struct lmv_tgt_desc *tgt;
1852 rc = lmv_check_connect(obd);
1856 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
1857 LL_IT2STR(it), PFID(&op_data->op_fid1));
1859 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1861 RETURN(PTR_ERR(tgt));
1863 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%u\n",
1864 LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
1866 rc = md_enqueue(tgt->ltd_exp, einfo, policy, it, op_data, lockh,
1873 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1874 struct ptlrpc_request **preq)
1876 struct ptlrpc_request *req = NULL;
1877 struct obd_device *obd = exp->exp_obd;
1878 struct lmv_obd *lmv = &obd->u.lmv;
1879 struct lmv_tgt_desc *tgt;
1880 struct mdt_body *body;
1884 rc = lmv_check_connect(obd);
1888 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1890 RETURN(PTR_ERR(tgt));
1892 CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" -> mds #%d\n",
1893 (int)op_data->op_namelen, op_data->op_name,
1894 PFID(&op_data->op_fid1), tgt->ltd_idx);
1896 rc = md_getattr_name(tgt->ltd_exp, op_data, preq);
1900 body = req_capsule_server_get(&(*preq)->rq_pill, &RMF_MDT_BODY);
1901 LASSERT(body != NULL);
1903 if (body->mbo_valid & OBD_MD_MDS) {
1904 struct lu_fid rid = body->mbo_fid1;
1905 CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1908 tgt = lmv_find_target(lmv, &rid);
1910 ptlrpc_req_finished(*preq);
1912 RETURN(PTR_ERR(tgt));
1915 op_data->op_fid1 = rid;
1916 op_data->op_valid |= OBD_MD_FLCROSSREF;
1917 op_data->op_namelen = 0;
1918 op_data->op_name = NULL;
1919 rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
1920 ptlrpc_req_finished(*preq);
1927 #define md_op_data_fid(op_data, fl) \
1928 (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1929 fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1930 fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1931 fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1934 static int lmv_early_cancel(struct obd_export *exp, struct lmv_tgt_desc *tgt,
1935 struct md_op_data *op_data, __u32 op_tgt,
1936 enum ldlm_mode mode, int bits, int flag)
1938 struct lu_fid *fid = md_op_data_fid(op_data, flag);
1939 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
1940 union ldlm_policy_data policy = { { 0 } };
1944 if (!fid_is_sane(fid))
1948 tgt = lmv_find_target(lmv, fid);
1950 RETURN(PTR_ERR(tgt));
1953 if (tgt->ltd_idx != op_tgt) {
1954 CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1955 policy.l_inodebits.bits = bits;
1956 rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1957 mode, LCF_ASYNC, NULL);
1960 "EARLY_CANCEL skip operation target %d on "DFID"\n",
1962 op_data->op_flags |= flag;
1970 * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1973 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1974 struct ptlrpc_request **request)
1976 struct obd_device *obd = exp->exp_obd;
1977 struct lmv_obd *lmv = &obd->u.lmv;
1978 struct lmv_tgt_desc *tgt;
1982 rc = lmv_check_connect(obd);
1986 LASSERT(op_data->op_namelen != 0);
1988 CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
1989 PFID(&op_data->op_fid2), (int)op_data->op_namelen,
1990 op_data->op_name, PFID(&op_data->op_fid1));
1992 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
1993 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
1994 op_data->op_cap = cfs_curproc_cap_pack();
1995 if (op_data->op_mea2 != NULL) {
1996 struct lmv_stripe_md *lsm = op_data->op_mea2;
1997 const struct lmv_oinfo *oinfo;
1999 oinfo = lsm_name_to_stripe_info(lsm, op_data->op_name,
2000 op_data->op_namelen);
2002 RETURN(PTR_ERR(oinfo));
2004 op_data->op_fid2 = oinfo->lmo_fid;
2007 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
2009 RETURN(PTR_ERR(tgt));
2012 * Cancel UPDATE lock on child (fid1).
2014 op_data->op_flags |= MF_MDC_CANCEL_FID2;
2015 rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_idx, LCK_EX,
2016 MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2020 rc = md_link(tgt->ltd_exp, op_data, request);
2025 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
2026 const char *old, size_t oldlen,
2027 const char *new, size_t newlen,
2028 struct ptlrpc_request **request)
2030 struct obd_device *obd = exp->exp_obd;
2031 struct lmv_obd *lmv = &obd->u.lmv;
2032 struct lmv_tgt_desc *src_tgt;
2033 struct lmv_tgt_desc *tgt_tgt;
2034 struct obd_export *target_exp;
2035 struct mdt_body *body;
2039 LASSERT(oldlen != 0);
2041 CDEBUG(D_INODE, "RENAME %.*s in "DFID":%d to %.*s in "DFID":%d\n",
2042 (int)oldlen, old, PFID(&op_data->op_fid1),
2043 op_data->op_mea1 ? op_data->op_mea1->lsm_md_stripe_count : 0,
2044 (int)newlen, new, PFID(&op_data->op_fid2),
2045 op_data->op_mea2 ? op_data->op_mea2->lsm_md_stripe_count : 0);
2047 rc = lmv_check_connect(obd);
2051 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2052 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2053 op_data->op_cap = cfs_curproc_cap_pack();
2054 if (op_data->op_cli_flags & CLI_MIGRATE) {
2055 LASSERTF(fid_is_sane(&op_data->op_fid3), "invalid FID "DFID"\n",
2056 PFID(&op_data->op_fid3));
2058 if (op_data->op_mea1 != NULL) {
2059 struct lmv_stripe_md *lsm = op_data->op_mea1;
2060 struct lmv_tgt_desc *tmp;
2062 /* Fix the parent fid for striped dir */
2063 tmp = lmv_locate_target_for_name(lmv, lsm, old,
2068 RETURN(PTR_ERR(tmp));
2071 rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
2075 src_tgt = lmv_find_target(lmv, &op_data->op_fid3);
2076 if (IS_ERR(src_tgt))
2077 RETURN(PTR_ERR(src_tgt));
2079 target_exp = src_tgt->ltd_exp;
2081 if (op_data->op_mea1 != NULL) {
2082 struct lmv_stripe_md *lsm = op_data->op_mea1;
2084 src_tgt = lmv_locate_target_for_name(lmv, lsm, old,
2089 src_tgt = lmv_find_target(lmv, &op_data->op_fid1);
2091 if (IS_ERR(src_tgt))
2092 RETURN(PTR_ERR(src_tgt));
2095 if (op_data->op_mea2 != NULL) {
2096 struct lmv_stripe_md *lsm = op_data->op_mea2;
2098 tgt_tgt = lmv_locate_target_for_name(lmv, lsm, new,
2103 tgt_tgt = lmv_find_target(lmv, &op_data->op_fid2);
2106 if (IS_ERR(tgt_tgt))
2107 RETURN(PTR_ERR(tgt_tgt));
2109 target_exp = tgt_tgt->ltd_exp;
2113 * LOOKUP lock on src child (fid3) should also be cancelled for
2114 * src_tgt in mdc_rename.
2116 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2119 * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
2122 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
2123 LCK_EX, MDS_INODELOCK_UPDATE,
2124 MF_MDC_CANCEL_FID2);
2129 * Cancel LOOKUP locks on source child (fid3) for parent tgt_tgt.
2131 if (fid_is_sane(&op_data->op_fid3)) {
2132 struct lmv_tgt_desc *tgt;
2134 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2136 RETURN(PTR_ERR(tgt));
2138 /* Cancel LOOKUP lock on its parent */
2139 rc = lmv_early_cancel(exp, tgt, op_data, src_tgt->ltd_idx,
2140 LCK_EX, MDS_INODELOCK_LOOKUP,
2141 MF_MDC_CANCEL_FID3);
2145 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
2146 LCK_EX, MDS_INODELOCK_FULL,
2147 MF_MDC_CANCEL_FID3);
2154 * Cancel all the locks on tgt child (fid4).
2156 if (fid_is_sane(&op_data->op_fid4)) {
2157 struct lmv_tgt_desc *tgt;
2159 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
2160 LCK_EX, MDS_INODELOCK_FULL,
2161 MF_MDC_CANCEL_FID4);
2165 tgt = lmv_find_target(lmv, &op_data->op_fid4);
2167 RETURN(PTR_ERR(tgt));
2169 /* Since the target child might be destroyed, and it might
2170 * become orphan, and we can only check orphan on the local
2171 * MDT right now, so we send rename request to the MDT where
2172 * target child is located. If target child does not exist,
2173 * then it will send the request to the target parent */
2174 target_exp = tgt->ltd_exp;
2177 rc = md_rename(target_exp, op_data, old, oldlen, new, newlen,
2180 if (rc != 0 && rc != -EXDEV)
2183 body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2187 /* Not cross-ref case, just get out of here. */
2188 if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2191 CDEBUG(D_INODE, "%s: try rename to another MDT for "DFID"\n",
2192 exp->exp_obd->obd_name, PFID(&body->mbo_fid1));
2194 op_data->op_fid4 = body->mbo_fid1;
2195 ptlrpc_req_finished(*request);
2200 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2201 void *ea, size_t ealen, struct ptlrpc_request **request)
2203 struct obd_device *obd = exp->exp_obd;
2204 struct lmv_obd *lmv = &obd->u.lmv;
2205 struct lmv_tgt_desc *tgt;
2209 rc = lmv_check_connect(obd);
2213 CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x\n",
2214 PFID(&op_data->op_fid1), op_data->op_attr.ia_valid);
2216 op_data->op_flags |= MF_MDC_CANCEL_FID1;
2217 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2219 RETURN(PTR_ERR(tgt));
2221 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, request);
2226 static int lmv_fsync(struct obd_export *exp, const struct lu_fid *fid,
2227 struct ptlrpc_request **request)
2229 struct obd_device *obd = exp->exp_obd;
2230 struct lmv_obd *lmv = &obd->u.lmv;
2231 struct lmv_tgt_desc *tgt;
2235 rc = lmv_check_connect(obd);
2239 tgt = lmv_find_target(lmv, fid);
2241 RETURN(PTR_ERR(tgt));
2243 rc = md_fsync(tgt->ltd_exp, fid, request);
2248 * Get current minimum entry from striped directory
2250 * This function will search the dir entry, whose hash value is the
2251 * closest(>=) to @hash_offset, from all of sub-stripes, and it is
2252 * only being called for striped directory.
2254 * \param[in] exp export of LMV
2255 * \param[in] op_data parameters transferred beween client MD stack
2256 * stripe_information will be included in this
2258 * \param[in] cb_op ldlm callback being used in enqueue in
2260 * \param[in] hash_offset the hash value, which is used to locate
2261 * minum(closet) dir entry
2262 * \param[in|out] stripe_offset the caller use this to indicate the stripe
2263 * index of last entry, so to avoid hash conflict
2264 * between stripes. It will also be used to
2265 * return the stripe index of current dir entry.
2266 * \param[in|out] entp the minum entry and it also is being used
2267 * to input the last dir entry to resolve the
2270 * \param[out] ppage the page which holds the minum entry
2272 * \retval = 0 get the entry successfully
2273 * negative errno (< 0) does not get the entry
2275 static int lmv_get_min_striped_entry(struct obd_export *exp,
2276 struct md_op_data *op_data,
2277 struct md_callback *cb_op,
2278 __u64 hash_offset, int *stripe_offset,
2279 struct lu_dirent **entp,
2280 struct page **ppage)
2282 struct obd_device *obd = exp->exp_obd;
2283 struct lmv_obd *lmv = &obd->u.lmv;
2284 struct lmv_stripe_md *lsm = op_data->op_mea1;
2285 struct lmv_tgt_desc *tgt;
2287 struct lu_dirent *min_ent = NULL;
2288 struct page *min_page = NULL;
2294 stripe_count = lsm->lsm_md_stripe_count;
2295 for (i = 0; i < stripe_count; i++) {
2296 struct lu_dirent *ent = NULL;
2297 struct page *page = NULL;
2298 struct lu_dirpage *dp;
2299 __u64 stripe_hash = hash_offset;
2301 tgt = lmv_get_target(lmv, lsm->lsm_md_oinfo[i].lmo_mds, NULL);
2303 GOTO(out, rc = PTR_ERR(tgt));
2305 /* op_data will be shared by each stripe, so we need
2306 * reset these value for each stripe */
2307 op_data->op_fid1 = lsm->lsm_md_oinfo[i].lmo_fid;
2308 op_data->op_fid2 = lsm->lsm_md_oinfo[i].lmo_fid;
2309 op_data->op_data = lsm->lsm_md_oinfo[i].lmo_root;
2311 rc = md_read_page(tgt->ltd_exp, op_data, cb_op, stripe_hash,
2316 dp = page_address(page);
2317 for (ent = lu_dirent_start(dp); ent != NULL;
2318 ent = lu_dirent_next(ent)) {
2319 /* Skip dummy entry */
2320 if (le16_to_cpu(ent->lde_namelen) == 0)
2323 if (le64_to_cpu(ent->lde_hash) < hash_offset)
2326 if (le64_to_cpu(ent->lde_hash) == hash_offset &&
2327 (*entp == ent || i < *stripe_offset))
2330 /* skip . and .. for other stripes */
2332 (strncmp(ent->lde_name, ".",
2333 le16_to_cpu(ent->lde_namelen)) == 0 ||
2334 strncmp(ent->lde_name, "..",
2335 le16_to_cpu(ent->lde_namelen)) == 0))
2341 stripe_hash = le64_to_cpu(dp->ldp_hash_end);
2344 page_cache_release(page);
2347 /* reach the end of current stripe, go to next stripe */
2348 if (stripe_hash == MDS_DIR_END_OFF)
2354 if (min_ent != NULL) {
2355 if (le64_to_cpu(min_ent->lde_hash) >
2356 le64_to_cpu(ent->lde_hash)) {
2359 page_cache_release(min_page);
2364 page_cache_release(page);
2375 if (*ppage != NULL) {
2377 page_cache_release(*ppage);
2379 *stripe_offset = min_idx;
2386 * Build dir entry page from a striped directory
2388 * This function gets one entry by @offset from a striped directory. It will
2389 * read entries from all of stripes, and choose one closest to the required
2390 * offset(&offset). A few notes
2391 * 1. skip . and .. for non-zero stripes, because there can only have one .
2392 * and .. in a directory.
2393 * 2. op_data will be shared by all of stripes, instead of allocating new
2394 * one, so need to restore before reusing.
2395 * 3. release the entry page if that is not being chosen.
2397 * \param[in] exp obd export refer to LMV
2398 * \param[in] op_data hold those MD parameters of read_entry
2399 * \param[in] cb_op ldlm callback being used in enqueue in mdc_read_entry
2400 * \param[out] ldp the entry being read
2401 * \param[out] ppage the page holding the entry. Note: because the entry
2402 * will be accessed in upper layer, so we need hold the
2403 * page until the usages of entry is finished, see
2404 * ll_dir_entry_next.
2406 * retval =0 if get entry successfully
2407 * <0 cannot get entry
2409 static int lmv_read_striped_page(struct obd_export *exp,
2410 struct md_op_data *op_data,
2411 struct md_callback *cb_op,
2412 __u64 offset, struct page **ppage)
2414 struct obd_device *obd = exp->exp_obd;
2415 struct lu_fid master_fid = op_data->op_fid1;
2416 struct inode *master_inode = op_data->op_data;
2417 __u64 hash_offset = offset;
2418 struct lu_dirpage *dp;
2419 struct page *min_ent_page = NULL;
2420 struct page *ent_page = NULL;
2421 struct lu_dirent *ent;
2424 struct lu_dirent *min_ent = NULL;
2425 struct lu_dirent *last_ent;
2430 rc = lmv_check_connect(obd);
2434 /* Allocate a page and read entries from all of stripes and fill
2435 * the page by hash order */
2436 ent_page = alloc_page(GFP_KERNEL);
2437 if (ent_page == NULL)
2440 /* Initialize the entry page */
2441 dp = kmap(ent_page);
2442 memset(dp, 0, sizeof(*dp));
2443 dp->ldp_hash_start = cpu_to_le64(offset);
2444 dp->ldp_flags |= LDF_COLLIDE;
2447 left_bytes = PAGE_CACHE_SIZE - sizeof(*dp);
2453 /* Find the minum entry from all sub-stripes */
2454 rc = lmv_get_min_striped_entry(exp, op_data, cb_op, hash_offset,
2460 /* If it can not get minum entry, it means it already reaches
2461 * the end of this directory */
2462 if (min_ent == NULL) {
2463 last_ent->lde_reclen = 0;
2464 hash_offset = MDS_DIR_END_OFF;
2468 ent_size = le16_to_cpu(min_ent->lde_reclen);
2470 /* the last entry lde_reclen is 0, but it might not
2471 * the end of this entry of this temporay entry */
2473 ent_size = lu_dirent_calc_size(
2474 le16_to_cpu(min_ent->lde_namelen),
2475 le32_to_cpu(min_ent->lde_attrs));
2476 if (ent_size > left_bytes) {
2477 last_ent->lde_reclen = cpu_to_le16(0);
2478 hash_offset = le64_to_cpu(min_ent->lde_hash);
2482 memcpy(ent, min_ent, ent_size);
2484 /* Replace . with master FID and Replace .. with the parent FID
2485 * of master object */
2486 if (strncmp(ent->lde_name, ".",
2487 le16_to_cpu(ent->lde_namelen)) == 0 &&
2488 le16_to_cpu(ent->lde_namelen) == 1)
2489 fid_cpu_to_le(&ent->lde_fid, &master_fid);
2490 else if (strncmp(ent->lde_name, "..",
2491 le16_to_cpu(ent->lde_namelen)) == 0 &&
2492 le16_to_cpu(ent->lde_namelen) == 2)
2493 fid_cpu_to_le(&ent->lde_fid, &op_data->op_fid3);
2495 left_bytes -= ent_size;
2496 ent->lde_reclen = cpu_to_le16(ent_size);
2498 ent = (void *)ent + ent_size;
2499 hash_offset = le64_to_cpu(min_ent->lde_hash);
2500 if (hash_offset == MDS_DIR_END_OFF) {
2501 last_ent->lde_reclen = 0;
2506 if (min_ent_page != NULL) {
2507 kunmap(min_ent_page);
2508 page_cache_release(min_ent_page);
2511 if (unlikely(rc != 0)) {
2512 __free_page(ent_page);
2516 dp->ldp_flags |= LDF_EMPTY;
2517 dp->ldp_flags = cpu_to_le32(dp->ldp_flags);
2518 dp->ldp_hash_end = cpu_to_le64(hash_offset);
2521 /* We do not want to allocate md_op_data during each
2522 * dir entry reading, so op_data will be shared by every stripe,
2523 * then we need to restore it back to original value before
2524 * return to the upper layer */
2525 op_data->op_fid1 = master_fid;
2526 op_data->op_fid2 = master_fid;
2527 op_data->op_data = master_inode;
2534 int lmv_read_page(struct obd_export *exp, struct md_op_data *op_data,
2535 struct md_callback *cb_op, __u64 offset,
2536 struct page **ppage)
2538 struct obd_device *obd = exp->exp_obd;
2539 struct lmv_obd *lmv = &obd->u.lmv;
2540 struct lmv_stripe_md *lsm = op_data->op_mea1;
2541 struct lmv_tgt_desc *tgt;
2545 rc = lmv_check_connect(obd);
2549 if (unlikely(lsm != NULL)) {
2550 rc = lmv_read_striped_page(exp, op_data, cb_op, offset, ppage);
2554 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2556 RETURN(PTR_ERR(tgt));
2558 rc = md_read_page(tgt->ltd_exp, op_data, cb_op, offset, ppage);
2564 * Unlink a file/directory
2566 * Unlink a file or directory under the parent dir. The unlink request
2567 * usually will be sent to the MDT where the child is located, but if
2568 * the client does not have the child FID then request will be sent to the
2569 * MDT where the parent is located.
2571 * If the parent is a striped directory then it also needs to locate which
2572 * stripe the name of the child is located, and replace the parent FID
2573 * (@op->op_fid1) with the stripe FID. Note: if the stripe is unknown,
2574 * it will walk through all of sub-stripes until the child is being
2577 * \param[in] exp export refer to LMV
2578 * \param[in] op_data different parameters transferred beween client
2579 * MD stacks, name, namelen, FIDs etc.
2580 * op_fid1 is the parent FID, op_fid2 is the child
2582 * \param[out] request point to the request of unlink.
2584 * retval 0 if succeed
2585 * negative errno if failed.
2587 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2588 struct ptlrpc_request **request)
2590 struct obd_device *obd = exp->exp_obd;
2591 struct lmv_obd *lmv = &obd->u.lmv;
2592 struct lmv_tgt_desc *tgt = NULL;
2593 struct lmv_tgt_desc *parent_tgt = NULL;
2594 struct mdt_body *body;
2596 int stripe_index = 0;
2597 struct lmv_stripe_md *lsm = op_data->op_mea1;
2600 rc = lmv_check_connect(obd);
2604 /* For striped dir, we need to locate the parent as well */
2606 struct lmv_tgt_desc *tmp;
2608 LASSERT(op_data->op_name != NULL &&
2609 op_data->op_namelen != 0);
2611 tmp = lmv_locate_target_for_name(lmv, lsm,
2613 op_data->op_namelen,
2617 /* return -EBADFD means unknown hash type, might
2618 * need try all sub-stripe here */
2619 if (IS_ERR(tmp) && PTR_ERR(tmp) != -EBADFD)
2620 RETURN(PTR_ERR(tmp));
2622 /* Note: both migrating dir and unknown hash dir need to
2623 * try all of sub-stripes, so we need start search the
2624 * name from stripe 0, but migrating dir is already handled
2625 * inside lmv_locate_target_for_name(), so we only check
2626 * unknown hash type directory here */
2627 if (!lmv_is_known_hash_type(lsm->lsm_md_hash_type)) {
2628 struct lmv_oinfo *oinfo;
2630 oinfo = &lsm->lsm_md_oinfo[stripe_index];
2632 op_data->op_fid1 = oinfo->lmo_fid;
2633 op_data->op_mds = oinfo->lmo_mds;
2638 /* Send unlink requests to the MDT where the child is located */
2639 if (likely(!fid_is_zero(&op_data->op_fid2)))
2640 tgt = lmv_find_target(lmv, &op_data->op_fid2);
2641 else if (lsm != NULL)
2642 tgt = lmv_get_target(lmv, op_data->op_mds, NULL);
2644 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
2647 RETURN(PTR_ERR(tgt));
2649 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2650 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2651 op_data->op_cap = cfs_curproc_cap_pack();
2654 * If child's fid is given, cancel unused locks for it if it is from
2655 * another export than parent.
2657 * LOOKUP lock for child (fid3) should also be cancelled on parent
2658 * tgt_tgt in mdc_unlink().
2660 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2663 * Cancel FULL locks on child (fid3).
2665 parent_tgt = lmv_find_target(lmv, &op_data->op_fid1);
2666 if (IS_ERR(parent_tgt))
2667 RETURN(PTR_ERR(parent_tgt));
2669 if (parent_tgt != tgt) {
2670 rc = lmv_early_cancel(exp, parent_tgt, op_data, tgt->ltd_idx,
2671 LCK_EX, MDS_INODELOCK_LOOKUP,
2672 MF_MDC_CANCEL_FID3);
2675 rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_idx, LCK_EX,
2676 MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2680 CDEBUG(D_INODE, "unlink with fid="DFID"/"DFID" -> mds #%u\n",
2681 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2), tgt->ltd_idx);
2683 rc = md_unlink(tgt->ltd_exp, op_data, request);
2684 if (rc != 0 && rc != -EREMOTE && rc != -ENOENT)
2687 /* Try next stripe if it is needed. */
2688 if (rc == -ENOENT && lsm != NULL && lmv_need_try_all_stripes(lsm)) {
2689 struct lmv_oinfo *oinfo;
2692 if (stripe_index >= lsm->lsm_md_stripe_count)
2695 oinfo = &lsm->lsm_md_oinfo[stripe_index];
2697 op_data->op_fid1 = oinfo->lmo_fid;
2698 op_data->op_mds = oinfo->lmo_mds;
2700 ptlrpc_req_finished(*request);
2703 goto try_next_stripe;
2706 body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2710 /* Not cross-ref case, just get out of here. */
2711 if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2714 CDEBUG(D_INODE, "%s: try unlink to another MDT for "DFID"\n",
2715 exp->exp_obd->obd_name, PFID(&body->mbo_fid1));
2717 /* This is a remote object, try remote MDT, Note: it may
2718 * try more than 1 time here, Considering following case
2719 * /mnt/lustre is root on MDT0, remote1 is on MDT1
2720 * 1. Initially A does not know where remote1 is, it send
2721 * unlink RPC to MDT0, MDT0 return -EREMOTE, it will
2722 * resend unlink RPC to MDT1 (retry 1st time).
2724 * 2. During the unlink RPC in flight,
2725 * client B mv /mnt/lustre/remote1 /mnt/lustre/remote2
2726 * and create new remote1, but on MDT0
2728 * 3. MDT1 get unlink RPC(from A), then do remote lock on
2729 * /mnt/lustre, then lookup get fid of remote1, and find
2730 * it is remote dir again, and replay -EREMOTE again.
2732 * 4. Then A will resend unlink RPC to MDT0. (retry 2nd times).
2734 * In theory, it might try unlimited time here, but it should
2735 * be very rare case. */
2736 op_data->op_fid2 = body->mbo_fid1;
2737 ptlrpc_req_finished(*request);
2743 static int lmv_precleanup(struct obd_device *obd)
2746 fld_client_proc_fini(&obd->u.lmv.lmv_fld);
2747 lprocfs_obd_cleanup(obd);
2748 lprocfs_free_md_stats(obd);
2753 * Get by key a value associated with a LMV device.
2755 * Dispatch request to lower-layer devices as needed.
2757 * \param[in] env execution environment for this thread
2758 * \param[in] exp export for the LMV device
2759 * \param[in] keylen length of key identifier
2760 * \param[in] key identifier of key to get value for
2761 * \param[in] vallen size of \a val
2762 * \param[out] val pointer to storage location for value
2763 * \param[in] lsm optional striping metadata of object
2765 * \retval 0 on success
2766 * \retval negative negated errno on failure
2768 static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
2769 __u32 keylen, void *key, __u32 *vallen, void *val)
2771 struct obd_device *obd;
2772 struct lmv_obd *lmv;
2776 obd = class_exp2obd(exp);
2778 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2779 exp->exp_handle.h_cookie);
2784 if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2787 rc = lmv_check_connect(obd);
2791 LASSERT(*vallen == sizeof(__u32));
2792 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2793 struct lmv_tgt_desc *tgt = lmv->tgts[i];
2795 * All tgts should be connected when this gets called.
2797 if (tgt == NULL || tgt->ltd_exp == NULL)
2800 if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
2805 } else if (KEY_IS(KEY_MAX_EASIZE) ||
2806 KEY_IS(KEY_DEFAULT_EASIZE) ||
2807 KEY_IS(KEY_CONN_DATA)) {
2808 rc = lmv_check_connect(obd);
2813 * Forwarding this request to first MDS, it should know LOV
2816 rc = obd_get_info(env, lmv->tgts[0]->ltd_exp, keylen, key,
2818 if (!rc && KEY_IS(KEY_CONN_DATA))
2819 exp->exp_connect_data = *(struct obd_connect_data *)val;
2821 } else if (KEY_IS(KEY_TGT_COUNT)) {
2822 *((int *)val) = lmv->desc.ld_tgt_count;
2826 CDEBUG(D_IOCTL, "Invalid key\n");
2831 * Asynchronously set by key a value associated with a LMV device.
2833 * Dispatch request to lower-layer devices as needed.
2835 * \param[in] env execution environment for this thread
2836 * \param[in] exp export for the LMV device
2837 * \param[in] keylen length of key identifier
2838 * \param[in] key identifier of key to store value for
2839 * \param[in] vallen size of value to store
2840 * \param[in] val pointer to data to be stored
2841 * \param[in] set optional list of related ptlrpc requests
2843 * \retval 0 on success
2844 * \retval negative negated errno on failure
2846 int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
2847 __u32 keylen, void *key, __u32 vallen, void *val,
2848 struct ptlrpc_request_set *set)
2850 struct lmv_tgt_desc *tgt = NULL;
2851 struct obd_device *obd;
2852 struct lmv_obd *lmv;
2856 obd = class_exp2obd(exp);
2858 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2859 exp->exp_handle.h_cookie);
2864 if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX) ||
2865 KEY_IS(KEY_DEFAULT_EASIZE)) {
2868 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2871 if (tgt == NULL || tgt->ltd_exp == NULL)
2874 err = obd_set_info_async(env, tgt->ltd_exp,
2875 keylen, key, vallen, val, set);
2886 static int lmv_unpack_md_v1(struct obd_export *exp, struct lmv_stripe_md *lsm,
2887 const struct lmv_mds_md_v1 *lmm1)
2889 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2896 lsm->lsm_md_magic = le32_to_cpu(lmm1->lmv_magic);
2897 lsm->lsm_md_stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
2898 lsm->lsm_md_master_mdt_index = le32_to_cpu(lmm1->lmv_master_mdt_index);
2899 if (OBD_FAIL_CHECK(OBD_FAIL_UNKNOWN_LMV_STRIPE))
2900 lsm->lsm_md_hash_type = LMV_HASH_TYPE_UNKNOWN;
2902 lsm->lsm_md_hash_type = le32_to_cpu(lmm1->lmv_hash_type);
2903 lsm->lsm_md_layout_version = le32_to_cpu(lmm1->lmv_layout_version);
2904 cplen = strlcpy(lsm->lsm_md_pool_name, lmm1->lmv_pool_name,
2905 sizeof(lsm->lsm_md_pool_name));
2907 if (cplen >= sizeof(lsm->lsm_md_pool_name))
2910 CDEBUG(D_INFO, "unpack lsm count %d, master %d hash_type %d"
2911 "layout_version %d\n", lsm->lsm_md_stripe_count,
2912 lsm->lsm_md_master_mdt_index, lsm->lsm_md_hash_type,
2913 lsm->lsm_md_layout_version);
2915 stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
2916 for (i = 0; i < stripe_count; i++) {
2917 fid_le_to_cpu(&lsm->lsm_md_oinfo[i].lmo_fid,
2918 &lmm1->lmv_stripe_fids[i]);
2919 rc = lmv_fld_lookup(lmv, &lsm->lsm_md_oinfo[i].lmo_fid,
2920 &lsm->lsm_md_oinfo[i].lmo_mds);
2923 CDEBUG(D_INFO, "unpack fid #%d "DFID"\n", i,
2924 PFID(&lsm->lsm_md_oinfo[i].lmo_fid));
2930 static int lmv_unpackmd(struct obd_export *exp, struct lmv_stripe_md **lsmp,
2931 const union lmv_mds_md *lmm, size_t lmm_size)
2933 struct lmv_stripe_md *lsm;
2936 bool allocated = false;
2939 LASSERT(lsmp != NULL);
2943 if (lsm != NULL && lmm == NULL) {
2945 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
2946 /* For migrating inode, the master stripe and master
2947 * object will be the same, so do not need iput, see
2948 * ll_update_lsm_md */
2949 if (!(lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION &&
2950 i == 0) && lsm->lsm_md_oinfo[i].lmo_root != NULL)
2951 iput(lsm->lsm_md_oinfo[i].lmo_root);
2953 lsm_size = lmv_stripe_md_size(lsm->lsm_md_stripe_count);
2954 OBD_FREE(lsm, lsm_size);
2959 if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_STRIPE)
2963 if (le32_to_cpu(lmm->lmv_magic) != LMV_MAGIC_V1 &&
2964 le32_to_cpu(lmm->lmv_magic) != LMV_USER_MAGIC) {
2965 CERROR("%s: invalid lmv magic %x: rc = %d\n",
2966 exp->exp_obd->obd_name, le32_to_cpu(lmm->lmv_magic),
2971 if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_V1)
2972 lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
2975 * Unpack default dirstripe(lmv_user_md) to lmv_stripe_md,
2976 * stripecount should be 0 then.
2978 lsm_size = lmv_stripe_md_size(0);
2980 lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
2982 OBD_ALLOC(lsm, lsm_size);
2989 switch (le32_to_cpu(lmm->lmv_magic)) {
2991 rc = lmv_unpack_md_v1(exp, lsm, &lmm->lmv_md_v1);
2994 CERROR("%s: unrecognized magic %x\n", exp->exp_obd->obd_name,
2995 le32_to_cpu(lmm->lmv_magic));
3000 if (rc != 0 && allocated) {
3001 OBD_FREE(lsm, lsm_size);
3008 void lmv_free_memmd(struct lmv_stripe_md *lsm)
3010 lmv_unpackmd(NULL, &lsm, NULL, 0);
3012 EXPORT_SYMBOL(lmv_free_memmd);
3014 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
3015 union ldlm_policy_data *policy,
3016 enum ldlm_mode mode, enum ldlm_cancel_flags flags,
3019 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3024 LASSERT(fid != NULL);
3026 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3027 struct lmv_tgt_desc *tgt = lmv->tgts[i];
3030 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
3033 err = md_cancel_unused(tgt->ltd_exp, fid, policy, mode, flags,
3041 int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
3044 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3045 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3049 if (tgt == NULL || tgt->ltd_exp == NULL)
3051 rc = md_set_lock_data(tgt->ltd_exp, lockh, data, bits);
3055 enum ldlm_mode lmv_lock_match(struct obd_export *exp, __u64 flags,
3056 const struct lu_fid *fid, enum ldlm_type type,
3057 union ldlm_policy_data *policy,
3058 enum ldlm_mode mode, struct lustre_handle *lockh)
3060 struct obd_device *obd = exp->exp_obd;
3061 struct lmv_obd *lmv = &obd->u.lmv;
3067 CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
3070 * With DNE every object can have two locks in different namespaces:
3071 * lookup lock in space of MDT storing direntry and update/open lock in
3072 * space of MDT storing inode. Try the MDT that the FID maps to first,
3073 * since this can be easily found, and only try others if that fails.
3075 for (i = 0, tgt = lmv_find_target_index(lmv, fid);
3076 i < lmv->desc.ld_tgt_count;
3077 i++, tgt = (tgt + 1) % lmv->desc.ld_tgt_count) {
3079 CDEBUG(D_HA, "%s: "DFID" is inaccessible: rc = %d\n",
3080 obd->obd_name, PFID(fid), tgt);
3084 if (lmv->tgts[tgt] == NULL ||
3085 lmv->tgts[tgt]->ltd_exp == NULL ||
3086 lmv->tgts[tgt]->ltd_active == 0)
3089 rc = md_lock_match(lmv->tgts[tgt]->ltd_exp, flags, fid,
3090 type, policy, mode, lockh);
3098 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
3099 struct obd_export *dt_exp, struct obd_export *md_exp,
3100 struct lustre_md *md)
3102 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3103 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3105 if (tgt == NULL || tgt->ltd_exp == NULL)
3108 return md_get_lustre_md(lmv->tgts[0]->ltd_exp, req, dt_exp, md_exp, md);
3111 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
3113 struct obd_device *obd = exp->exp_obd;
3114 struct lmv_obd *lmv = &obd->u.lmv;
3115 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3118 if (md->lmv != NULL) {
3119 lmv_free_memmd(md->lmv);
3122 if (tgt == NULL || tgt->ltd_exp == NULL)
3124 RETURN(md_free_lustre_md(lmv->tgts[0]->ltd_exp, md));
3127 int lmv_set_open_replay_data(struct obd_export *exp,
3128 struct obd_client_handle *och,
3129 struct lookup_intent *it)
3131 struct obd_device *obd = exp->exp_obd;
3132 struct lmv_obd *lmv = &obd->u.lmv;
3133 struct lmv_tgt_desc *tgt;
3136 tgt = lmv_find_target(lmv, &och->och_fid);
3138 RETURN(PTR_ERR(tgt));
3140 RETURN(md_set_open_replay_data(tgt->ltd_exp, och, it));
3143 int lmv_clear_open_replay_data(struct obd_export *exp,
3144 struct obd_client_handle *och)
3146 struct obd_device *obd = exp->exp_obd;
3147 struct lmv_obd *lmv = &obd->u.lmv;
3148 struct lmv_tgt_desc *tgt;
3151 tgt = lmv_find_target(lmv, &och->och_fid);
3153 RETURN(PTR_ERR(tgt));
3155 RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
3158 static int lmv_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
3159 u32 suppgid, struct ptlrpc_request **request)
3161 struct obd_device *obd = exp->exp_obd;
3162 struct lmv_obd *lmv = &obd->u.lmv;
3163 struct lmv_tgt_desc *tgt;
3167 rc = lmv_check_connect(obd);
3171 tgt = lmv_find_target(lmv, fid);
3173 RETURN(PTR_ERR(tgt));
3175 rc = md_get_remote_perm(tgt->ltd_exp, fid, suppgid, request);
3179 int lmv_intent_getattr_async(struct obd_export *exp,
3180 struct md_enqueue_info *minfo)
3182 struct md_op_data *op_data = &minfo->mi_data;
3183 struct obd_device *obd = exp->exp_obd;
3184 struct lmv_obd *lmv = &obd->u.lmv;
3185 struct lmv_tgt_desc *ptgt = NULL;
3186 struct lmv_tgt_desc *ctgt = NULL;
3190 if (!fid_is_sane(&op_data->op_fid2))
3193 rc = lmv_check_connect(obd);
3197 ptgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
3199 RETURN(PTR_ERR(ptgt));
3201 ctgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
3203 RETURN(PTR_ERR(ctgt));
3206 * if child is on remote MDT, we need 2 async RPCs to fetch both LOOKUP
3207 * lock on parent, and UPDATE lock on child MDT, which makes all
3208 * complicated. Considering remote dir is rare case, and not supporting
3209 * it in statahead won't cause any issue, drop its support for now.
3214 rc = md_intent_getattr_async(ptgt->ltd_exp, minfo);
3218 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
3219 struct lu_fid *fid, __u64 *bits)
3221 struct obd_device *obd = exp->exp_obd;
3222 struct lmv_obd *lmv = &obd->u.lmv;
3223 struct lmv_tgt_desc *tgt;
3227 rc = lmv_check_connect(obd);
3231 tgt = lmv_find_target(lmv, fid);
3233 RETURN(PTR_ERR(tgt));
3235 rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
3239 int lmv_get_fid_from_lsm(struct obd_export *exp,
3240 const struct lmv_stripe_md *lsm,
3241 const char *name, int namelen, struct lu_fid *fid)
3243 const struct lmv_oinfo *oinfo;
3245 LASSERT(lsm != NULL);
3246 oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
3248 return PTR_ERR(oinfo);
3250 *fid = oinfo->lmo_fid;
3256 * For lmv, only need to send request to master MDT, and the master MDT will
3257 * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
3258 * we directly fetch data from the slave MDTs.
3260 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
3261 struct obd_quotactl *oqctl)
3263 struct obd_device *obd = class_exp2obd(exp);
3264 struct lmv_obd *lmv = &obd->u.lmv;
3265 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3268 __u64 curspace, curinodes;
3272 tgt->ltd_exp == NULL ||
3274 lmv->desc.ld_tgt_count == 0) {
3275 CERROR("master lmv inactive\n");
3279 if (oqctl->qc_cmd != Q_GETOQUOTA) {
3280 rc = obd_quotactl(tgt->ltd_exp, oqctl);
3284 curspace = curinodes = 0;
3285 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3289 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
3292 err = obd_quotactl(tgt->ltd_exp, oqctl);
3294 CERROR("getquota on mdt %d failed. %d\n", i, err);
3298 curspace += oqctl->qc_dqblk.dqb_curspace;
3299 curinodes += oqctl->qc_dqblk.dqb_curinodes;
3302 oqctl->qc_dqblk.dqb_curspace = curspace;
3303 oqctl->qc_dqblk.dqb_curinodes = curinodes;
3308 static int lmv_merge_attr(struct obd_export *exp,
3309 const struct lmv_stripe_md *lsm,
3310 struct cl_attr *attr,
3311 ldlm_blocking_callback cb_blocking)
3316 rc = lmv_revalidate_slaves(exp, lsm, cb_blocking, 0);
3320 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
3321 struct inode *inode = lsm->lsm_md_oinfo[i].lmo_root;
3323 CDEBUG(D_INFO, ""DFID" size %llu, blocks %llu nlink %u,"
3324 " atime %lu ctime %lu, mtime %lu.\n",
3325 PFID(&lsm->lsm_md_oinfo[i].lmo_fid),
3326 i_size_read(inode), (unsigned long long)inode->i_blocks,
3327 inode->i_nlink, LTIME_S(inode->i_atime),
3328 LTIME_S(inode->i_ctime), LTIME_S(inode->i_mtime));
3330 /* for slave stripe, it needs to subtract nlink for . and .. */
3332 attr->cat_nlink += inode->i_nlink - 2;
3334 attr->cat_nlink = inode->i_nlink;
3336 attr->cat_size += i_size_read(inode);
3337 attr->cat_blocks += inode->i_blocks;
3339 if (attr->cat_atime < LTIME_S(inode->i_atime))
3340 attr->cat_atime = LTIME_S(inode->i_atime);
3342 if (attr->cat_ctime < LTIME_S(inode->i_ctime))
3343 attr->cat_ctime = LTIME_S(inode->i_ctime);
3345 if (attr->cat_mtime < LTIME_S(inode->i_mtime))
3346 attr->cat_mtime = LTIME_S(inode->i_mtime);
3351 struct obd_ops lmv_obd_ops = {
3352 .o_owner = THIS_MODULE,
3353 .o_setup = lmv_setup,
3354 .o_cleanup = lmv_cleanup,
3355 .o_precleanup = lmv_precleanup,
3356 .o_process_config = lmv_process_config,
3357 .o_connect = lmv_connect,
3358 .o_disconnect = lmv_disconnect,
3359 .o_statfs = lmv_statfs,
3360 .o_get_info = lmv_get_info,
3361 .o_set_info_async = lmv_set_info_async,
3362 .o_notify = lmv_notify,
3363 .o_get_uuid = lmv_get_uuid,
3364 .o_iocontrol = lmv_iocontrol,
3365 .o_quotactl = lmv_quotactl
3368 struct md_ops lmv_md_ops = {
3369 .m_getstatus = lmv_getstatus,
3370 .m_null_inode = lmv_null_inode,
3371 .m_find_cbdata = lmv_find_cbdata,
3372 .m_close = lmv_close,
3373 .m_create = lmv_create,
3374 .m_enqueue = lmv_enqueue,
3375 .m_getattr = lmv_getattr,
3376 .m_getxattr = lmv_getxattr,
3377 .m_getattr_name = lmv_getattr_name,
3378 .m_intent_lock = lmv_intent_lock,
3380 .m_rename = lmv_rename,
3381 .m_setattr = lmv_setattr,
3382 .m_setxattr = lmv_setxattr,
3383 .m_fsync = lmv_fsync,
3384 .m_read_page = lmv_read_page,
3385 .m_unlink = lmv_unlink,
3386 .m_init_ea_size = lmv_init_ea_size,
3387 .m_cancel_unused = lmv_cancel_unused,
3388 .m_set_lock_data = lmv_set_lock_data,
3389 .m_lock_match = lmv_lock_match,
3390 .m_get_lustre_md = lmv_get_lustre_md,
3391 .m_free_lustre_md = lmv_free_lustre_md,
3392 .m_merge_attr = lmv_merge_attr,
3393 .m_set_open_replay_data = lmv_set_open_replay_data,
3394 .m_clear_open_replay_data = lmv_clear_open_replay_data,
3395 .m_get_remote_perm = lmv_get_remote_perm,
3396 .m_intent_getattr_async = lmv_intent_getattr_async,
3397 .m_revalidate_lock = lmv_revalidate_lock,
3398 .m_get_fid_from_lsm = lmv_get_fid_from_lsm,
3399 .m_unpackmd = lmv_unpackmd,
3402 static int __init lmv_init(void)
3404 return class_register_type(&lmv_obd_ops, &lmv_md_ops, true, NULL,
3405 LUSTRE_LMV_NAME, NULL);
3408 static void __exit lmv_exit(void)
3410 class_unregister_type(LUSTRE_LMV_NAME);
3413 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3414 MODULE_DESCRIPTION("Lustre Logical Metadata Volume");
3415 MODULE_VERSION(LUSTRE_VERSION_STRING);
3416 MODULE_LICENSE("GPL");
3418 module_init(lmv_init);
3419 module_exit(lmv_exit);