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, 2013, 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
39 #include <linux/slab.h>
40 #include <linux/module.h>
41 #include <linux/init.h>
42 #include <linux/slab.h>
43 #include <linux/pagemap.h>
45 #include <asm/div64.h>
46 #include <linux/seq_file.h>
47 #include <linux/namei.h>
48 #include <asm/uaccess.h>
50 #include <liblustre.h>
53 #include <lustre/lustre_idl.h>
54 #include <obd_support.h>
55 #include <lustre_lib.h>
56 #include <lustre_net.h>
57 #include <obd_class.h>
58 #include <lprocfs_status.h>
59 #include <lustre_lite.h>
60 #include <lustre_fid.h>
61 #include "lmv_internal.h"
63 static void lmv_activate_target(struct lmv_obd *lmv,
64 struct lmv_tgt_desc *tgt,
67 if (tgt->ltd_active == activate)
70 tgt->ltd_active = activate;
71 lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
77 * -EINVAL : UUID can't be found in the LMV's target list
78 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
79 * -EBADF : The UUID is found, but the OBD of the wrong type (!)
81 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
84 struct lmv_tgt_desc *tgt;
85 struct obd_device *obd;
90 CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
91 lmv, uuid->uuid, activate);
93 spin_lock(&lmv->lmv_lock);
94 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
96 if (tgt == NULL || tgt->ltd_exp == NULL)
99 CDEBUG(D_INFO, "Target idx %d is %s conn "LPX64"\n", i,
100 tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
102 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
106 if (i == lmv->desc.ld_tgt_count)
107 GOTO(out_lmv_lock, rc = -EINVAL);
109 obd = class_exp2obd(tgt->ltd_exp);
111 GOTO(out_lmv_lock, rc = -ENOTCONN);
113 CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
114 obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
115 obd->obd_type->typ_name, i);
116 LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
118 if (tgt->ltd_active == activate) {
119 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
120 activate ? "" : "in");
121 GOTO(out_lmv_lock, rc);
124 CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
125 activate ? "" : "in");
126 lmv_activate_target(lmv, tgt, activate);
130 spin_unlock(&lmv->lmv_lock);
134 struct obd_uuid *lmv_get_uuid(struct obd_export *exp)
136 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
138 return obd_get_uuid(lmv->tgts[0]->ltd_exp);
141 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
142 enum obd_notify_event ev, void *data)
144 struct obd_connect_data *conn_data;
145 struct lmv_obd *lmv = &obd->u.lmv;
146 struct obd_uuid *uuid;
150 if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
151 CERROR("unexpected notification of %s %s!\n",
152 watched->obd_type->typ_name,
157 uuid = &watched->u.cli.cl_target_uuid;
158 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
160 * Set MDC as active before notifying the observer, so the
161 * observer can use the MDC normally.
163 rc = lmv_set_mdc_active(lmv, uuid,
164 ev == OBD_NOTIFY_ACTIVE);
166 CERROR("%sactivation of %s failed: %d\n",
167 ev == OBD_NOTIFY_ACTIVE ? "" : "de",
171 } else if (ev == OBD_NOTIFY_OCD) {
172 conn_data = &watched->u.cli.cl_import->imp_connect_data;
174 * XXX: Make sure that ocd_connect_flags from all targets are
175 * the same. Otherwise one of MDTs runs wrong version or
176 * something like this. --umka
178 obd->obd_self_export->exp_connect_data = *conn_data;
181 else if (ev == OBD_NOTIFY_DISCON) {
183 * For disconnect event, flush fld cache for failout MDS case.
185 fld_client_flush(&lmv->lmv_fld);
189 * Pass the notification up the chain.
191 if (obd->obd_observer)
192 rc = obd_notify(obd->obd_observer, watched, ev, data);
198 * This is fake connect function. Its purpose is to initialize lmv and say
199 * caller that everything is okay. Real connection will be performed later.
201 static int lmv_connect(const struct lu_env *env,
202 struct obd_export **exp, struct obd_device *obd,
203 struct obd_uuid *cluuid, struct obd_connect_data *data,
207 struct proc_dir_entry *lmv_proc_dir;
209 struct lmv_obd *lmv = &obd->u.lmv;
210 struct lustre_handle conn = { 0 };
215 * We don't want to actually do the underlying connections more than
216 * once, so keep track.
219 if (lmv->refcount > 1) {
224 rc = class_connect(&conn, obd, cluuid);
226 CERROR("class_connection() returned %d\n", rc);
230 *exp = class_conn2export(&conn);
231 class_export_get(*exp);
235 lmv->cluuid = *cluuid;
238 lmv->conn_data = *data;
241 lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
243 if (IS_ERR(lmv_proc_dir)) {
244 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
245 obd->obd_type->typ_name, obd->obd_name);
251 * All real clients should perform actual connection right away, because
252 * it is possible, that LMV will not have opportunity to connect targets
253 * and MDC stuff will be called directly, for instance while reading
254 * ../mdc/../kbytesfree procfs file, etc.
256 if (data->ocd_connect_flags & OBD_CONNECT_REAL)
257 rc = lmv_check_connect(obd);
262 lprocfs_remove(&lmv_proc_dir);
269 static void lmv_set_timeouts(struct obd_device *obd)
271 struct lmv_tgt_desc *tgt;
276 if (lmv->server_timeout == 0)
279 if (lmv->connected == 0)
282 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
284 if (tgt == NULL || tgt->ltd_exp == NULL || tgt->ltd_active == 0)
287 obd_set_info_async(NULL, tgt->ltd_exp, sizeof(KEY_INTERMDS),
288 KEY_INTERMDS, 0, NULL, NULL);
292 static int lmv_init_ea_size(struct obd_export *exp, int easize,
293 int def_easize, int cookiesize)
295 struct obd_device *obd = exp->exp_obd;
296 struct lmv_obd *lmv = &obd->u.lmv;
302 if (lmv->max_easize < easize) {
303 lmv->max_easize = easize;
306 if (lmv->max_def_easize < def_easize) {
307 lmv->max_def_easize = def_easize;
310 if (lmv->max_cookiesize < cookiesize) {
311 lmv->max_cookiesize = cookiesize;
317 if (lmv->connected == 0)
320 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
321 if (lmv->tgts[i] == NULL ||
322 lmv->tgts[i]->ltd_exp == NULL ||
323 lmv->tgts[i]->ltd_active == 0) {
324 CWARN("%s: NULL export for %d\n", obd->obd_name, i);
328 rc = md_init_ea_size(lmv->tgts[i]->ltd_exp, easize, def_easize,
331 CERROR("%s: obd_init_ea_size() failed on MDT target %d:"
332 " rc = %d.\n", obd->obd_name, i, rc);
339 #define MAX_STRING_SIZE 128
341 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
344 struct proc_dir_entry *lmv_proc_dir;
346 struct lmv_obd *lmv = &obd->u.lmv;
347 struct obd_uuid *cluuid = &lmv->cluuid;
348 struct obd_uuid lmv_mdc_uuid = { "LMV_MDC_UUID" };
349 struct obd_device *mdc_obd;
350 struct obd_export *mdc_exp;
351 struct lu_fld_target target;
355 mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
358 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
362 CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
363 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
364 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
367 if (!mdc_obd->obd_set_up) {
368 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
372 rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
373 &lmv->conn_data, NULL);
375 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
380 * Init fid sequence client for this mdc and add new fld target.
382 rc = obd_fid_init(mdc_obd, mdc_exp, LUSTRE_SEQ_METADATA);
386 target.ft_srv = NULL;
387 target.ft_exp = mdc_exp;
388 target.ft_idx = tgt->ltd_idx;
390 fld_client_add_target(&lmv->lmv_fld, &target);
392 rc = obd_register_observer(mdc_obd, obd);
394 obd_disconnect(mdc_exp);
395 CERROR("target %s register_observer error %d\n",
396 tgt->ltd_uuid.uuid, rc);
400 if (obd->obd_observer) {
402 * Tell the observer about the new target.
404 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
406 (void *)(tgt - lmv->tgts[0]));
408 obd_disconnect(mdc_exp);
414 tgt->ltd_exp = mdc_exp;
415 lmv->desc.ld_active_tgt_count++;
417 md_init_ea_size(tgt->ltd_exp, lmv->max_easize,
418 lmv->max_def_easize, lmv->max_cookiesize);
420 CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
421 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
422 cfs_atomic_read(&obd->obd_refcount));
425 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
427 struct proc_dir_entry *mdc_symlink;
429 LASSERT(mdc_obd->obd_type != NULL);
430 LASSERT(mdc_obd->obd_type->typ_name != NULL);
431 mdc_symlink = lprocfs_add_symlink(mdc_obd->obd_name,
434 mdc_obd->obd_type->typ_name,
436 if (mdc_symlink == NULL) {
437 CERROR("Could not register LMV target "
438 "/proc/fs/lustre/%s/%s/target_obds/%s.",
439 obd->obd_type->typ_name, obd->obd_name,
441 lprocfs_remove(&lmv_proc_dir);
449 static void lmv_del_target(struct lmv_obd *lmv, int index)
451 if (lmv->tgts[index] == NULL)
454 OBD_FREE_PTR(lmv->tgts[index]);
455 lmv->tgts[index] = NULL;
459 static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
460 __u32 index, int gen)
462 struct lmv_obd *lmv = &obd->u.lmv;
463 struct lmv_tgt_desc *tgt;
467 CDEBUG(D_CONFIG, "Target uuid: %s. index %d\n", uuidp->uuid, index);
471 if (lmv->desc.ld_tgt_count == 0) {
472 struct obd_device *mdc_obd;
474 mdc_obd = class_find_client_obd(uuidp, LUSTRE_MDC_NAME,
477 lmv_init_unlock(lmv);
478 CERROR("%s: Target %s not attached: rc = %d\n",
479 obd->obd_name, uuidp->uuid, -EINVAL);
484 if ((index < lmv->tgts_size) && (lmv->tgts[index] != NULL)) {
485 tgt = lmv->tgts[index];
486 CERROR("%s: UUID %s already assigned at LOV target index %d:"
487 " rc = %d\n", obd->obd_name,
488 obd_uuid2str(&tgt->ltd_uuid), index, -EEXIST);
489 lmv_init_unlock(lmv);
493 if (index >= lmv->tgts_size) {
494 /* We need to reallocate the lmv target array. */
495 struct lmv_tgt_desc **newtgts, **old = NULL;
499 while (newsize < index + 1)
500 newsize = newsize << 1;
501 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
502 if (newtgts == NULL) {
503 lmv_init_unlock(lmv);
507 if (lmv->tgts_size) {
508 memcpy(newtgts, lmv->tgts,
509 sizeof(*newtgts) * lmv->tgts_size);
511 oldsize = lmv->tgts_size;
515 lmv->tgts_size = newsize;
518 OBD_FREE(old, sizeof(*old) * oldsize);
520 CDEBUG(D_CONFIG, "tgts: %p size: %d\n", lmv->tgts,
526 lmv_init_unlock(lmv);
530 mutex_init(&tgt->ltd_fid_mutex);
531 tgt->ltd_idx = index;
532 tgt->ltd_uuid = *uuidp;
534 lmv->tgts[index] = tgt;
535 if (index >= lmv->desc.ld_tgt_count)
536 lmv->desc.ld_tgt_count = index + 1;
538 if (lmv->connected) {
539 rc = lmv_connect_mdc(obd, tgt);
541 spin_lock(&lmv->lmv_lock);
542 lmv->desc.ld_tgt_count--;
543 memset(tgt, 0, sizeof(*tgt));
544 spin_unlock(&lmv->lmv_lock);
546 int easize = sizeof(struct lmv_stripe_md) +
547 lmv->desc.ld_tgt_count *
548 sizeof(struct lu_fid);
549 lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
553 lmv_init_unlock(lmv);
557 int lmv_check_connect(struct obd_device *obd)
559 struct lmv_obd *lmv = &obd->u.lmv;
560 struct lmv_tgt_desc *tgt;
570 if (lmv->connected) {
571 lmv_init_unlock(lmv);
575 if (lmv->desc.ld_tgt_count == 0) {
576 lmv_init_unlock(lmv);
577 CERROR("%s: no targets configured.\n", obd->obd_name);
581 CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
582 lmv->cluuid.uuid, obd->obd_name);
584 LASSERT(lmv->tgts != NULL);
586 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
590 rc = lmv_connect_mdc(obd, tgt);
595 lmv_set_timeouts(obd);
596 class_export_put(lmv->exp);
598 easize = lmv_get_easize(lmv);
599 lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
600 lmv_init_unlock(lmv);
611 --lmv->desc.ld_active_tgt_count;
612 rc2 = obd_disconnect(tgt->ltd_exp);
614 CERROR("LMV target %s disconnect on "
615 "MDC idx %d: error %d\n",
616 tgt->ltd_uuid.uuid, i, rc2);
620 class_disconnect(lmv->exp);
621 lmv_init_unlock(lmv);
625 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
628 struct proc_dir_entry *lmv_proc_dir;
630 struct lmv_obd *lmv = &obd->u.lmv;
631 struct obd_device *mdc_obd;
635 LASSERT(tgt != NULL);
636 LASSERT(obd != NULL);
638 mdc_obd = class_exp2obd(tgt->ltd_exp);
641 mdc_obd->obd_force = obd->obd_force;
642 mdc_obd->obd_fail = obd->obd_fail;
643 mdc_obd->obd_no_recov = obd->obd_no_recov;
647 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
649 struct proc_dir_entry *mdc_symlink;
651 mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
653 lprocfs_remove(&mdc_symlink);
655 CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
656 obd->obd_type->typ_name, obd->obd_name,
661 rc = obd_fid_fini(tgt->ltd_exp->exp_obd);
663 CERROR("Can't finanize fids factory\n");
665 CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
666 tgt->ltd_exp->exp_obd->obd_name,
667 tgt->ltd_exp->exp_obd->obd_uuid.uuid);
669 obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
670 rc = obd_disconnect(tgt->ltd_exp);
672 if (tgt->ltd_active) {
673 CERROR("Target %s disconnect error %d\n",
674 tgt->ltd_uuid.uuid, rc);
678 lmv_activate_target(lmv, tgt, 0);
683 static int lmv_disconnect(struct obd_export *exp)
685 struct obd_device *obd = class_exp2obd(exp);
687 struct proc_dir_entry *lmv_proc_dir;
689 struct lmv_obd *lmv = &obd->u.lmv;
698 * Only disconnect the underlying layers on the final disconnect.
701 if (lmv->refcount != 0)
704 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
705 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
708 lmv_disconnect_mdc(obd, lmv->tgts[i]);
712 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
714 lprocfs_remove(&lmv_proc_dir);
716 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
717 obd->obd_type->typ_name, obd->obd_name);
723 * This is the case when no real connection is established by
724 * lmv_check_connect().
727 class_export_put(exp);
728 rc = class_disconnect(exp);
729 if (lmv->refcount == 0)
734 static int lmv_fid2path(struct obd_export *exp, int len, void *karg, void *uarg)
736 struct obd_device *obddev = class_exp2obd(exp);
737 struct lmv_obd *lmv = &obddev->u.lmv;
738 struct getinfo_fid2path *gf;
739 struct lmv_tgt_desc *tgt;
740 struct getinfo_fid2path *remote_gf = NULL;
741 int remote_gf_size = 0;
744 gf = (struct getinfo_fid2path *)karg;
745 tgt = lmv_find_target(lmv, &gf->gf_fid);
747 RETURN(PTR_ERR(tgt));
750 rc = obd_iocontrol(OBD_IOC_FID2PATH, tgt->ltd_exp, len, gf, uarg);
751 if (rc != 0 && rc != -EREMOTE)
752 GOTO(out_fid2path, rc);
754 /* If remote_gf != NULL, it means just building the
755 * path on the remote MDT, copy this path segement to gf */
756 if (remote_gf != NULL) {
757 struct getinfo_fid2path *ori_gf;
760 ori_gf = (struct getinfo_fid2path *)karg;
761 if (strlen(ori_gf->gf_path) +
762 strlen(gf->gf_path) > ori_gf->gf_pathlen)
763 GOTO(out_fid2path, rc = -EOVERFLOW);
765 ptr = ori_gf->gf_path;
767 memmove(ptr + strlen(gf->gf_path) + 1, ptr,
768 strlen(ori_gf->gf_path));
770 strncpy(ptr, gf->gf_path, strlen(gf->gf_path));
771 ptr += strlen(gf->gf_path);
775 CDEBUG(D_INFO, "%s: get path %s "DFID" rec: "LPU64" ln: %u\n",
776 tgt->ltd_exp->exp_obd->obd_name,
777 gf->gf_path, PFID(&gf->gf_fid), gf->gf_recno,
781 GOTO(out_fid2path, rc);
783 /* sigh, has to go to another MDT to do path building further */
784 if (remote_gf == NULL) {
785 remote_gf_size = sizeof(*remote_gf) + PATH_MAX;
786 OBD_ALLOC(remote_gf, remote_gf_size);
787 if (remote_gf == NULL)
788 GOTO(out_fid2path, rc = -ENOMEM);
789 remote_gf->gf_pathlen = PATH_MAX;
792 if (!fid_is_sane(&gf->gf_fid)) {
793 CERROR("%s: invalid FID "DFID": rc = %d\n",
794 tgt->ltd_exp->exp_obd->obd_name,
795 PFID(&gf->gf_fid), -EINVAL);
796 GOTO(out_fid2path, rc = -EINVAL);
799 tgt = lmv_find_target(lmv, &gf->gf_fid);
801 GOTO(out_fid2path, rc = -EINVAL);
803 remote_gf->gf_fid = gf->gf_fid;
804 remote_gf->gf_recno = -1;
805 remote_gf->gf_linkno = -1;
806 memset(remote_gf->gf_path, 0, remote_gf->gf_pathlen);
808 goto repeat_fid2path;
811 if (remote_gf != NULL)
812 OBD_FREE(remote_gf, remote_gf_size);
816 static int lmv_hsm_req_count(struct lmv_obd *lmv,
817 const struct hsm_user_request *hur,
818 const struct lmv_tgt_desc *tgt_mds)
821 struct lmv_tgt_desc *curr_tgt;
823 /* count how many requests must be sent to the given target */
824 for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
825 curr_tgt = lmv_find_target(lmv, &hur->hur_user_item[i].hui_fid);
826 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid))
832 static void lmv_hsm_req_build(struct lmv_obd *lmv,
833 struct hsm_user_request *hur_in,
834 const struct lmv_tgt_desc *tgt_mds,
835 struct hsm_user_request *hur_out)
838 struct lmv_tgt_desc *curr_tgt;
840 /* build the hsm_user_request for the given target */
841 hur_out->hur_request = hur_in->hur_request;
843 for (i = 0; i < hur_in->hur_request.hr_itemcount; i++) {
844 curr_tgt = lmv_find_target(lmv,
845 &hur_in->hur_user_item[i].hui_fid);
846 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid)) {
847 hur_out->hur_user_item[nr_out] =
848 hur_in->hur_user_item[i];
852 hur_out->hur_request.hr_itemcount = nr_out;
853 memcpy(hur_data(hur_out), hur_data(hur_in),
854 hur_in->hur_request.hr_data_len);
857 static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len,
858 struct lustre_kernelcomm *lk, void *uarg)
863 /* unregister request (call from llapi_hsm_copytool_fini) */
864 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
865 /* best effort: try to clean as much as possible
866 * (continue on error) */
867 obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp, len, lk, uarg);
870 /* Whatever the result, remove copytool from kuc groups.
871 * Unreached coordinators will get EPIPE on next requests
872 * and will unregister automatically.
874 rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group);
878 static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len,
879 struct lustre_kernelcomm *lk, void *uarg)
884 bool any_set = false;
887 /* All or nothing: try to register to all MDS.
888 * In case of failure, unregister from previous MDS,
889 * except if it because of inactive target. */
890 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
891 err = obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp,
894 if (lmv->tgts[i]->ltd_active) {
895 /* permanent error */
896 CERROR("error: iocontrol MDC %s on MDT"
897 "idx %d cmd %x: err = %d\n",
898 lmv->tgts[i]->ltd_uuid.uuid,
901 lk->lk_flags |= LK_FLG_STOP;
902 /* unregister from previous MDS */
903 for (j = 0; j < i; j++)
905 lmv->tgts[j]->ltd_exp,
909 /* else: transient error.
910 * kuc will register to the missing MDT
918 /* no registration done: return error */
921 /* at least one registration done, with no failure */
922 filp = fget(lk->lk_wfd);
926 rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group, lk->lk_data);
927 if (rc != 0 && filp != NULL)
935 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
936 int len, void *karg, void *uarg)
938 struct obd_device *obddev = class_exp2obd(exp);
939 struct lmv_obd *lmv = &obddev->u.lmv;
943 int count = lmv->desc.ld_tgt_count;
950 case IOC_OBD_STATFS: {
951 struct obd_ioctl_data *data = karg;
952 struct obd_device *mdc_obd;
953 struct obd_statfs stat_buf = {0};
956 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
957 if ((index >= count))
960 if (lmv->tgts[index] == NULL ||
961 lmv->tgts[index]->ltd_active == 0)
964 mdc_obd = class_exp2obd(lmv->tgts[index]->ltd_exp);
969 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
970 min((int) data->ioc_plen2,
971 (int) sizeof(struct obd_uuid))))
974 rc = obd_statfs(NULL, lmv->tgts[index]->ltd_exp, &stat_buf,
975 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
979 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
980 min((int) data->ioc_plen1,
981 (int) sizeof(stat_buf))))
985 case OBD_IOC_QUOTACTL: {
986 struct if_quotactl *qctl = karg;
987 struct lmv_tgt_desc *tgt = NULL;
988 struct obd_quotactl *oqctl;
990 if (qctl->qc_valid == QC_MDTIDX) {
991 if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
994 tgt = lmv->tgts[qctl->qc_idx];
995 if (tgt == NULL || tgt->ltd_exp == NULL)
997 } else if (qctl->qc_valid == QC_UUID) {
998 for (i = 0; i < count; i++) {
1002 if (!obd_uuid_equals(&tgt->ltd_uuid,
1006 if (tgt->ltd_exp == NULL)
1018 LASSERT(tgt && tgt->ltd_exp);
1019 OBD_ALLOC_PTR(oqctl);
1023 QCTL_COPY(oqctl, qctl);
1024 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1026 QCTL_COPY(qctl, oqctl);
1027 qctl->qc_valid = QC_MDTIDX;
1028 qctl->obd_uuid = tgt->ltd_uuid;
1030 OBD_FREE_PTR(oqctl);
1033 case OBD_IOC_CHANGELOG_SEND:
1034 case OBD_IOC_CHANGELOG_CLEAR: {
1035 struct ioc_changelog *icc = karg;
1037 if (icc->icc_mdtindex >= count)
1040 if (lmv->tgts[icc->icc_mdtindex] == NULL ||
1041 lmv->tgts[icc->icc_mdtindex]->ltd_exp == NULL ||
1042 lmv->tgts[icc->icc_mdtindex]->ltd_active == 0)
1044 rc = obd_iocontrol(cmd, lmv->tgts[icc->icc_mdtindex]->ltd_exp,
1045 sizeof(*icc), icc, NULL);
1048 case LL_IOC_GET_CONNECT_FLAGS: {
1049 if (lmv->tgts[0] == NULL)
1051 rc = obd_iocontrol(cmd, lmv->tgts[0]->ltd_exp, len, karg, uarg);
1054 case OBD_IOC_FID2PATH: {
1055 rc = lmv_fid2path(exp, len, karg, uarg);
1058 case LL_IOC_HSM_STATE_GET:
1059 case LL_IOC_HSM_STATE_SET:
1060 case LL_IOC_HSM_ACTION: {
1061 struct md_op_data *op_data = karg;
1062 struct lmv_tgt_desc *tgt;
1064 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1066 RETURN(PTR_ERR(tgt));
1068 if (tgt->ltd_exp == NULL)
1071 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1074 case LL_IOC_HSM_PROGRESS: {
1075 const struct hsm_progress_kernel *hpk = karg;
1076 struct lmv_tgt_desc *tgt;
1078 tgt = lmv_find_target(lmv, &hpk->hpk_fid);
1080 RETURN(PTR_ERR(tgt));
1081 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1084 case LL_IOC_HSM_REQUEST: {
1085 struct hsm_user_request *hur = karg;
1086 struct lmv_tgt_desc *tgt;
1087 unsigned int reqcount = hur->hur_request.hr_itemcount;
1092 /* if the request is about a single fid
1093 * or if there is a single MDS, no need to split
1095 if (reqcount == 1 || count == 1) {
1096 tgt = lmv_find_target(lmv,
1097 &hur->hur_user_item[0].hui_fid);
1099 RETURN(PTR_ERR(tgt));
1100 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1102 /* split fid list to their respective MDS */
1103 for (i = 0; i < count; i++) {
1104 unsigned int nr, reqlen;
1106 struct hsm_user_request *req;
1108 nr = lmv_hsm_req_count(lmv, hur, lmv->tgts[i]);
1109 if (nr == 0) /* nothing for this MDS */
1112 /* build a request with fids for this MDS */
1113 reqlen = offsetof(typeof(*hur),
1115 + hur->hur_request.hr_data_len;
1116 OBD_ALLOC_LARGE(req, reqlen);
1120 lmv_hsm_req_build(lmv, hur, lmv->tgts[i], req);
1122 rc1 = obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp,
1124 if (rc1 != 0 && rc == 0)
1126 OBD_FREE_LARGE(req, reqlen);
1131 case LL_IOC_LOV_SWAP_LAYOUTS: {
1132 struct md_op_data *op_data = karg;
1133 struct lmv_tgt_desc *tgt1, *tgt2;
1135 tgt1 = lmv_find_target(lmv, &op_data->op_fid1);
1137 RETURN(PTR_ERR(tgt1));
1139 tgt2 = lmv_find_target(lmv, &op_data->op_fid2);
1141 RETURN(PTR_ERR(tgt2));
1143 if ((tgt1->ltd_exp == NULL) || (tgt2->ltd_exp == NULL))
1146 /* only files on same MDT can have their layouts swapped */
1147 if (tgt1->ltd_idx != tgt2->ltd_idx)
1150 rc = obd_iocontrol(cmd, tgt1->ltd_exp, len, karg, uarg);
1153 case LL_IOC_HSM_CT_START: {
1154 struct lustre_kernelcomm *lk = karg;
1155 if (lk->lk_flags & LK_FLG_STOP)
1156 rc = lmv_hsm_ct_unregister(lmv, cmd, len, lk, uarg);
1158 rc = lmv_hsm_ct_register(lmv, cmd, len, lk, uarg);
1162 for (i = 0; i < count; i++) {
1163 struct obd_device *mdc_obd;
1166 if (lmv->tgts[i] == NULL ||
1167 lmv->tgts[i]->ltd_exp == NULL)
1169 /* ll_umount_begin() sets force flag but for lmv, not
1170 * mdc. Let's pass it through */
1171 mdc_obd = class_exp2obd(lmv->tgts[i]->ltd_exp);
1172 mdc_obd->obd_force = obddev->obd_force;
1173 err = obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp, len,
1175 if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
1178 if (lmv->tgts[i]->ltd_active) {
1179 CERROR("error: iocontrol MDC %s on MDT"
1180 "idx %d cmd %x: err = %d\n",
1181 lmv->tgts[i]->ltd_uuid.uuid,
1196 static int lmv_all_chars_policy(int count, const char *name,
1207 static int lmv_nid_policy(struct lmv_obd *lmv)
1209 struct obd_import *imp;
1213 * XXX: To get nid we assume that underlying obd device is mdc.
1215 imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
1216 id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
1217 return id % lmv->desc.ld_tgt_count;
1220 static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1221 placement_policy_t placement)
1223 switch (placement) {
1224 case PLACEMENT_CHAR_POLICY:
1225 return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
1227 op_data->op_namelen);
1228 case PLACEMENT_NID_POLICY:
1229 return lmv_nid_policy(lmv);
1235 CERROR("Unsupported placement policy %x\n", placement);
1241 * This is _inode_ placement policy function (not name).
1243 static int lmv_placement_policy(struct obd_device *obd,
1244 struct md_op_data *op_data,
1247 struct lmv_obd *lmv = &obd->u.lmv;
1250 LASSERT(mds != NULL);
1252 if (lmv->desc.ld_tgt_count == 1) {
1258 * If stripe_offset is provided during setdirstripe
1259 * (setdirstripe -i xx), xx MDS will be choosen.
1261 if (op_data->op_cli_flags & CLI_SET_MEA) {
1262 struct lmv_user_md *lum;
1264 lum = (struct lmv_user_md *)op_data->op_data;
1265 if (lum->lum_type == LMV_STRIPE_TYPE &&
1266 lum->lum_stripe_offset != -1) {
1267 if (lum->lum_stripe_offset >= lmv->desc.ld_tgt_count) {
1268 CERROR("%s: Stripe_offset %d > MDT count %d:"
1269 " rc = %d\n", obd->obd_name,
1270 lum->lum_stripe_offset,
1271 lmv->desc.ld_tgt_count, -ERANGE);
1274 *mds = lum->lum_stripe_offset;
1279 /* Allocate new fid on target according to operation type and parent
1281 *mds = op_data->op_mds;
1285 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid,
1288 struct lmv_tgt_desc *tgt;
1292 tgt = lmv_get_target(lmv, mds);
1294 RETURN(PTR_ERR(tgt));
1297 * New seq alloc and FLD setup should be atomic. Otherwise we may find
1298 * on server that seq in new allocated fid is not yet known.
1300 mutex_lock(&tgt->ltd_fid_mutex);
1302 if (tgt->ltd_active == 0 || tgt->ltd_exp == NULL)
1303 GOTO(out, rc = -ENODEV);
1306 * Asking underlaying tgt layer to allocate new fid.
1308 rc = obd_fid_alloc(tgt->ltd_exp, fid, NULL);
1310 LASSERT(fid_is_sane(fid));
1316 mutex_unlock(&tgt->ltd_fid_mutex);
1320 int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1321 struct md_op_data *op_data)
1323 struct obd_device *obd = class_exp2obd(exp);
1324 struct lmv_obd *lmv = &obd->u.lmv;
1329 LASSERT(op_data != NULL);
1330 LASSERT(fid != NULL);
1332 rc = lmv_placement_policy(obd, op_data, &mds);
1334 CERROR("Can't get target for allocating fid, "
1339 rc = __lmv_fid_alloc(lmv, fid, mds);
1341 CERROR("Can't alloc new fid, rc %d\n", rc);
1348 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1350 struct lmv_obd *lmv = &obd->u.lmv;
1351 struct lprocfs_static_vars lvars;
1352 struct lmv_desc *desc;
1356 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1357 CERROR("LMV setup requires a descriptor\n");
1361 desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1362 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1363 CERROR("Lmv descriptor size wrong: %d > %d\n",
1364 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1368 OBD_ALLOC(lmv->tgts, sizeof(*lmv->tgts) * 32);
1369 if (lmv->tgts == NULL)
1371 lmv->tgts_size = 32;
1373 obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1374 lmv->desc.ld_tgt_count = 0;
1375 lmv->desc.ld_active_tgt_count = 0;
1376 lmv->max_cookiesize = 0;
1377 lmv->max_def_easize = 0;
1378 lmv->max_easize = 0;
1379 lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
1381 spin_lock_init(&lmv->lmv_lock);
1382 mutex_init(&lmv->init_mutex);
1384 lprocfs_lmv_init_vars(&lvars);
1386 lprocfs_obd_setup(obd, lvars.obd_vars);
1389 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
1390 0444, &lmv_proc_target_fops, obd);
1392 CWARN("%s: error adding LMV target_obd file: rc = %d\n",
1396 rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1397 LUSTRE_CLI_FLD_HASH_DHT);
1399 CERROR("Can't init FLD, err %d\n", rc);
1409 static int lmv_cleanup(struct obd_device *obd)
1411 struct lmv_obd *lmv = &obd->u.lmv;
1414 fld_client_fini(&lmv->lmv_fld);
1415 if (lmv->tgts != NULL) {
1417 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1418 if (lmv->tgts[i] == NULL)
1420 lmv_del_target(lmv, i);
1422 OBD_FREE(lmv->tgts, sizeof(*lmv->tgts) * lmv->tgts_size);
1428 static int lmv_process_config(struct obd_device *obd, obd_count len, void *buf)
1430 struct lustre_cfg *lcfg = buf;
1431 struct obd_uuid obd_uuid;
1437 switch (lcfg->lcfg_command) {
1439 /* modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID
1440 * 2:0 3:1 4:lustre-MDT0000-mdc_UUID */
1441 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
1442 GOTO(out, rc = -EINVAL);
1444 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
1446 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1)
1447 GOTO(out, rc = -EINVAL);
1448 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
1449 GOTO(out, rc = -EINVAL);
1450 rc = lmv_add_target(obd, &obd_uuid, index, gen);
1453 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1454 GOTO(out, rc = -EINVAL);
1460 static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
1461 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1463 struct obd_device *obd = class_exp2obd(exp);
1464 struct lmv_obd *lmv = &obd->u.lmv;
1465 struct obd_statfs *temp;
1470 rc = lmv_check_connect(obd);
1474 OBD_ALLOC(temp, sizeof(*temp));
1478 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1479 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1482 rc = obd_statfs(env, lmv->tgts[i]->ltd_exp, temp,
1485 CERROR("can't stat MDS #%d (%s), error %d\n", i,
1486 lmv->tgts[i]->ltd_exp->exp_obd->obd_name,
1488 GOTO(out_free_temp, rc);
1493 /* If the statfs is from mount, it will needs
1494 * retrieve necessary information from MDT0.
1495 * i.e. mount does not need the merged osfs
1497 * And also clients can be mounted as long as
1498 * MDT0 is in service*/
1499 if (flags & OBD_STATFS_FOR_MDT0)
1500 GOTO(out_free_temp, rc);
1502 osfs->os_bavail += temp->os_bavail;
1503 osfs->os_blocks += temp->os_blocks;
1504 osfs->os_ffree += temp->os_ffree;
1505 osfs->os_files += temp->os_files;
1511 OBD_FREE(temp, sizeof(*temp));
1515 static int lmv_getstatus(struct obd_export *exp,
1517 struct obd_capa **pc)
1519 struct obd_device *obd = exp->exp_obd;
1520 struct lmv_obd *lmv = &obd->u.lmv;
1524 rc = lmv_check_connect(obd);
1528 rc = md_getstatus(lmv->tgts[0]->ltd_exp, fid, pc);
1532 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1533 struct obd_capa *oc, obd_valid valid, const char *name,
1534 const char *input, int input_size, int output_size,
1535 int flags, struct ptlrpc_request **request)
1537 struct obd_device *obd = exp->exp_obd;
1538 struct lmv_obd *lmv = &obd->u.lmv;
1539 struct lmv_tgt_desc *tgt;
1543 rc = lmv_check_connect(obd);
1547 tgt = lmv_find_target(lmv, fid);
1549 RETURN(PTR_ERR(tgt));
1551 rc = md_getxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1552 input_size, output_size, flags, request);
1557 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1558 struct obd_capa *oc, obd_valid valid, const char *name,
1559 const char *input, int input_size, int output_size,
1560 int flags, __u32 suppgid,
1561 struct ptlrpc_request **request)
1563 struct obd_device *obd = exp->exp_obd;
1564 struct lmv_obd *lmv = &obd->u.lmv;
1565 struct lmv_tgt_desc *tgt;
1569 rc = lmv_check_connect(obd);
1573 tgt = lmv_find_target(lmv, fid);
1575 RETURN(PTR_ERR(tgt));
1577 rc = md_setxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1578 input_size, output_size, flags, suppgid,
1584 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1585 struct ptlrpc_request **request)
1587 struct obd_device *obd = exp->exp_obd;
1588 struct lmv_obd *lmv = &obd->u.lmv;
1589 struct lmv_tgt_desc *tgt;
1593 rc = lmv_check_connect(obd);
1597 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1599 RETURN(PTR_ERR(tgt));
1601 if (op_data->op_flags & MF_GET_MDT_IDX) {
1602 op_data->op_mds = tgt->ltd_idx;
1606 rc = md_getattr(tgt->ltd_exp, op_data, request);
1611 static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
1613 struct obd_device *obd = exp->exp_obd;
1614 struct lmv_obd *lmv = &obd->u.lmv;
1619 rc = lmv_check_connect(obd);
1623 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1626 * With DNE every object can have two locks in different namespaces:
1627 * lookup lock in space of MDT storing direntry and update/open lock in
1628 * space of MDT storing inode.
1630 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1631 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1633 md_null_inode(lmv->tgts[i]->ltd_exp, fid);
1639 static int lmv_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1640 ldlm_iterator_t it, void *data)
1642 struct obd_device *obd = exp->exp_obd;
1643 struct lmv_obd *lmv = &obd->u.lmv;
1648 rc = lmv_check_connect(obd);
1652 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1655 * With DNE every object can have two locks in different namespaces:
1656 * lookup lock in space of MDT storing direntry and update/open lock in
1657 * space of MDT storing inode.
1659 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1660 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1662 rc = md_find_cbdata(lmv->tgts[i]->ltd_exp, fid, it, data);
1671 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1672 struct md_open_data *mod, struct ptlrpc_request **request)
1674 struct obd_device *obd = exp->exp_obd;
1675 struct lmv_obd *lmv = &obd->u.lmv;
1676 struct lmv_tgt_desc *tgt;
1680 rc = lmv_check_connect(obd);
1684 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1686 RETURN(PTR_ERR(tgt));
1688 CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1689 rc = md_close(tgt->ltd_exp, op_data, mod, request);
1694 *lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1697 struct lmv_tgt_desc *tgt;
1699 tgt = lmv_find_target(lmv, fid);
1703 op_data->op_mds = tgt->ltd_idx;
1708 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1709 const void *data, int datalen, int mode, __u32 uid,
1710 __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1711 struct ptlrpc_request **request)
1713 struct obd_device *obd = exp->exp_obd;
1714 struct lmv_obd *lmv = &obd->u.lmv;
1715 struct lmv_tgt_desc *tgt;
1719 rc = lmv_check_connect(obd);
1723 if (!lmv->desc.ld_active_tgt_count)
1726 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1728 RETURN(PTR_ERR(tgt));
1730 rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
1734 CDEBUG(D_INODE, "CREATE '%*s' on "DFID" -> mds #%x\n",
1735 op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1738 op_data->op_flags |= MF_MDC_CANCEL_FID1;
1739 rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1740 cap_effective, rdev, request);
1743 if (*request == NULL)
1745 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1750 static int lmv_done_writing(struct obd_export *exp,
1751 struct md_op_data *op_data,
1752 struct md_open_data *mod)
1754 struct obd_device *obd = exp->exp_obd;
1755 struct lmv_obd *lmv = &obd->u.lmv;
1756 struct lmv_tgt_desc *tgt;
1760 rc = lmv_check_connect(obd);
1764 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1766 RETURN(PTR_ERR(tgt));
1768 rc = md_done_writing(tgt->ltd_exp, op_data, mod);
1773 lmv_enqueue_remote(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1774 struct lookup_intent *it, struct md_op_data *op_data,
1775 struct lustre_handle *lockh, void *lmm, int lmmsize,
1776 int extra_lock_flags)
1778 struct ptlrpc_request *req = it->d.lustre.it_data;
1779 struct obd_device *obd = exp->exp_obd;
1780 struct lmv_obd *lmv = &obd->u.lmv;
1781 struct lustre_handle plock;
1782 struct lmv_tgt_desc *tgt;
1783 struct md_op_data *rdata;
1785 struct mdt_body *body;
1790 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1791 LASSERT(body != NULL);
1793 if (!(body->valid & OBD_MD_MDS))
1796 CDEBUG(D_INODE, "REMOTE_ENQUEUE '%s' on "DFID" -> "DFID"\n",
1797 LL_IT2STR(it), PFID(&op_data->op_fid1), PFID(&body->fid1));
1800 * We got LOOKUP lock, but we really need attrs.
1802 pmode = it->d.lustre.it_lock_mode;
1803 LASSERT(pmode != 0);
1804 memcpy(&plock, lockh, sizeof(plock));
1805 it->d.lustre.it_lock_mode = 0;
1806 it->d.lustre.it_data = NULL;
1809 it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
1810 ptlrpc_req_finished(req);
1812 tgt = lmv_find_target(lmv, &fid1);
1814 GOTO(out, rc = PTR_ERR(tgt));
1816 OBD_ALLOC_PTR(rdata);
1818 GOTO(out, rc = -ENOMEM);
1820 rdata->op_fid1 = fid1;
1821 rdata->op_bias = MDS_CROSS_REF;
1823 rc = md_enqueue(tgt->ltd_exp, einfo, it, rdata, lockh,
1824 lmm, lmmsize, NULL, extra_lock_flags);
1825 OBD_FREE_PTR(rdata);
1828 ldlm_lock_decref(&plock, pmode);
1833 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1834 struct lookup_intent *it, struct md_op_data *op_data,
1835 struct lustre_handle *lockh, void *lmm, int lmmsize,
1836 struct ptlrpc_request **req, __u64 extra_lock_flags)
1838 struct obd_device *obd = exp->exp_obd;
1839 struct lmv_obd *lmv = &obd->u.lmv;
1840 struct lmv_tgt_desc *tgt;
1844 rc = lmv_check_connect(obd);
1848 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
1849 LL_IT2STR(it), PFID(&op_data->op_fid1));
1851 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1853 RETURN(PTR_ERR(tgt));
1855 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%d\n",
1856 LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
1858 rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data, lockh,
1859 lmm, lmmsize, req, extra_lock_flags);
1861 if (rc == 0 && it && it->it_op == IT_OPEN) {
1862 rc = lmv_enqueue_remote(exp, einfo, it, op_data, lockh,
1863 lmm, lmmsize, extra_lock_flags);
1869 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1870 struct ptlrpc_request **request)
1872 struct ptlrpc_request *req = NULL;
1873 struct obd_device *obd = exp->exp_obd;
1874 struct lmv_obd *lmv = &obd->u.lmv;
1875 struct lmv_tgt_desc *tgt;
1876 struct mdt_body *body;
1880 rc = lmv_check_connect(obd);
1884 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1886 RETURN(PTR_ERR(tgt));
1888 CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" -> mds #%d\n",
1889 op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1892 rc = md_getattr_name(tgt->ltd_exp, op_data, request);
1896 body = req_capsule_server_get(&(*request)->rq_pill,
1898 LASSERT(body != NULL);
1900 if (body->valid & OBD_MD_MDS) {
1901 struct lu_fid rid = body->fid1;
1902 CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1905 tgt = lmv_find_target(lmv, &rid);
1907 ptlrpc_req_finished(*request);
1908 RETURN(PTR_ERR(tgt));
1911 op_data->op_fid1 = rid;
1912 op_data->op_valid |= OBD_MD_FLCROSSREF;
1913 op_data->op_namelen = 0;
1914 op_data->op_name = NULL;
1915 rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
1916 ptlrpc_req_finished(*request);
1923 #define md_op_data_fid(op_data, fl) \
1924 (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1925 fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1926 fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1927 fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1930 static int lmv_early_cancel(struct obd_export *exp, struct md_op_data *op_data,
1931 int op_tgt, ldlm_mode_t mode, int bits, int flag)
1933 struct lu_fid *fid = md_op_data_fid(op_data, flag);
1934 struct obd_device *obd = exp->exp_obd;
1935 struct lmv_obd *lmv = &obd->u.lmv;
1936 struct lmv_tgt_desc *tgt;
1937 ldlm_policy_data_t policy = {{0}};
1941 if (!fid_is_sane(fid))
1944 tgt = lmv_find_target(lmv, fid);
1946 RETURN(PTR_ERR(tgt));
1948 if (tgt->ltd_idx != op_tgt) {
1949 CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1950 policy.l_inodebits.bits = bits;
1951 rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1952 mode, LCF_ASYNC, NULL);
1955 "EARLY_CANCEL skip operation target %d on "DFID"\n",
1957 op_data->op_flags |= flag;
1965 * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1968 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1969 struct ptlrpc_request **request)
1971 struct obd_device *obd = exp->exp_obd;
1972 struct lmv_obd *lmv = &obd->u.lmv;
1973 struct lmv_tgt_desc *tgt;
1977 rc = lmv_check_connect(obd);
1981 LASSERT(op_data->op_namelen != 0);
1983 CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
1984 PFID(&op_data->op_fid2), op_data->op_namelen,
1985 op_data->op_name, PFID(&op_data->op_fid1));
1987 op_data->op_fsuid = cfs_curproc_fsuid();
1988 op_data->op_fsgid = cfs_curproc_fsgid();
1989 op_data->op_cap = cfs_curproc_cap_pack();
1990 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
1992 RETURN(PTR_ERR(tgt));
1995 * Cancel UPDATE lock on child (fid1).
1997 op_data->op_flags |= MF_MDC_CANCEL_FID2;
1998 rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
1999 MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2003 rc = md_link(tgt->ltd_exp, op_data, request);
2008 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
2009 const char *old, int oldlen, const char *new, int newlen,
2010 struct ptlrpc_request **request)
2012 struct obd_device *obd = exp->exp_obd;
2013 struct lmv_obd *lmv = &obd->u.lmv;
2014 struct lmv_tgt_desc *src_tgt;
2015 struct lmv_tgt_desc *tgt_tgt;
2019 LASSERT(oldlen != 0);
2021 CDEBUG(D_INODE, "RENAME %*s in "DFID" to %*s in "DFID"\n",
2022 oldlen, old, PFID(&op_data->op_fid1),
2023 newlen, new, PFID(&op_data->op_fid2));
2025 rc = lmv_check_connect(obd);
2029 op_data->op_fsuid = cfs_curproc_fsuid();
2030 op_data->op_fsgid = cfs_curproc_fsgid();
2031 op_data->op_cap = cfs_curproc_cap_pack();
2032 src_tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
2033 if (IS_ERR(src_tgt))
2034 RETURN(PTR_ERR(src_tgt));
2036 tgt_tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
2037 if (IS_ERR(tgt_tgt))
2038 RETURN(PTR_ERR(tgt_tgt));
2040 * LOOKUP lock on src child (fid3) should also be cancelled for
2041 * src_tgt in mdc_rename.
2043 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2046 * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
2049 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2050 LCK_EX, MDS_INODELOCK_UPDATE,
2051 MF_MDC_CANCEL_FID2);
2054 * Cancel LOOKUP locks on tgt child (fid4) for parent tgt_tgt.
2057 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2058 LCK_EX, MDS_INODELOCK_LOOKUP,
2059 MF_MDC_CANCEL_FID4);
2063 * Cancel all the locks on tgt child (fid4).
2066 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2067 LCK_EX, MDS_INODELOCK_FULL,
2068 MF_MDC_CANCEL_FID4);
2071 rc = md_rename(src_tgt->ltd_exp, op_data, old, oldlen,
2072 new, newlen, request);
2076 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2077 void *ea, int ealen, void *ea2, int ea2len,
2078 struct ptlrpc_request **request,
2079 struct md_open_data **mod)
2081 struct obd_device *obd = exp->exp_obd;
2082 struct lmv_obd *lmv = &obd->u.lmv;
2083 struct lmv_tgt_desc *tgt;
2087 rc = lmv_check_connect(obd);
2091 CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x\n",
2092 PFID(&op_data->op_fid1), op_data->op_attr.ia_valid);
2094 op_data->op_flags |= MF_MDC_CANCEL_FID1;
2095 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2097 RETURN(PTR_ERR(tgt));
2099 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, ea2,
2100 ea2len, request, mod);
2105 static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
2106 struct obd_capa *oc, struct ptlrpc_request **request)
2108 struct obd_device *obd = exp->exp_obd;
2109 struct lmv_obd *lmv = &obd->u.lmv;
2110 struct lmv_tgt_desc *tgt;
2114 rc = lmv_check_connect(obd);
2118 tgt = lmv_find_target(lmv, fid);
2120 RETURN(PTR_ERR(tgt));
2122 rc = md_sync(tgt->ltd_exp, fid, oc, request);
2127 * Adjust a set of pages, each page containing an array of lu_dirpages,
2128 * so that each page can be used as a single logical lu_dirpage.
2130 * A lu_dirpage is laid out as follows, where s = ldp_hash_start,
2131 * e = ldp_hash_end, f = ldp_flags, p = padding, and each "ent" is a
2132 * struct lu_dirent. It has size up to LU_PAGE_SIZE. The ldp_hash_end
2133 * value is used as a cookie to request the next lu_dirpage in a
2134 * directory listing that spans multiple pages (two in this example):
2137 * .|--------v------- -----.
2138 * |s|e|f|p|ent|ent| ... |ent|
2139 * '--|-------------- -----' Each CFS_PAGE contains a single
2140 * '------. lu_dirpage.
2141 * .---------v------- -----.
2142 * |s|e|f|p|ent| 0 | ... | 0 |
2143 * '----------------- -----'
2145 * However, on hosts where the native VM page size (PAGE_CACHE_SIZE) is
2146 * larger than LU_PAGE_SIZE, a single host page may contain multiple
2147 * lu_dirpages. After reading the lu_dirpages from the MDS, the
2148 * ldp_hash_end of the first lu_dirpage refers to the one immediately
2149 * after it in the same CFS_PAGE (arrows simplified for brevity, but
2150 * in general e0==s1, e1==s2, etc.):
2152 * .-------------------- -----.
2153 * |s0|e0|f0|p|ent|ent| ... |ent|
2154 * |---v---------------- -----|
2155 * |s1|e1|f1|p|ent|ent| ... |ent|
2156 * |---v---------------- -----| Here, each CFS_PAGE contains
2157 * ... multiple lu_dirpages.
2158 * |---v---------------- -----|
2159 * |s'|e'|f'|p|ent|ent| ... |ent|
2160 * '---|---------------- -----'
2162 * .----------------------------.
2165 * This structure is transformed into a single logical lu_dirpage as follows:
2167 * - Replace e0 with e' so the request for the next lu_dirpage gets the page
2168 * labeled 'next CFS_PAGE'.
2170 * - Copy the LDF_COLLIDE flag from f' to f0 to correctly reflect whether
2171 * a hash collision with the next page exists.
2173 * - Adjust the lde_reclen of the ending entry of each lu_dirpage to span
2174 * to the first entry of the next lu_dirpage.
2176 #if PAGE_CACHE_SIZE > LU_PAGE_SIZE
2177 static void lmv_adjust_dirpages(struct page **pages, int ncfspgs, int nlupgs)
2181 for (i = 0; i < ncfspgs; i++) {
2182 struct lu_dirpage *dp = kmap(pages[i]);
2183 struct lu_dirpage *first = dp;
2184 struct lu_dirent *end_dirent = NULL;
2185 struct lu_dirent *ent;
2186 __u64 hash_end = dp->ldp_hash_end;
2187 __u32 flags = dp->ldp_flags;
2189 while (--nlupgs > 0) {
2190 ent = lu_dirent_start(dp);
2191 for (end_dirent = ent; ent != NULL;
2192 end_dirent = ent, ent = lu_dirent_next(ent));
2194 /* Advance dp to next lu_dirpage. */
2195 dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
2197 /* Check if we've reached the end of the CFS_PAGE. */
2198 if (!((unsigned long)dp & ~CFS_PAGE_MASK))
2201 /* Save the hash and flags of this lu_dirpage. */
2202 hash_end = dp->ldp_hash_end;
2203 flags = dp->ldp_flags;
2205 /* Check if lu_dirpage contains no entries. */
2209 /* Enlarge the end entry lde_reclen from 0 to
2210 * first entry of next lu_dirpage. */
2211 LASSERT(le16_to_cpu(end_dirent->lde_reclen) == 0);
2212 end_dirent->lde_reclen =
2213 cpu_to_le16((char *)(dp->ldp_entries) -
2214 (char *)end_dirent);
2217 first->ldp_hash_end = hash_end;
2218 first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
2219 first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
2223 LASSERTF(nlupgs == 0, "left = %d", nlupgs);
2226 #define lmv_adjust_dirpages(pages, ncfspgs, nlupgs) do {} while (0)
2227 #endif /* PAGE_CACHE_SIZE > LU_PAGE_SIZE */
2229 static int lmv_readpage(struct obd_export *exp, struct md_op_data *op_data,
2230 struct page **pages, struct ptlrpc_request **request)
2232 struct obd_device *obd = exp->exp_obd;
2233 struct lmv_obd *lmv = &obd->u.lmv;
2234 __u64 offset = op_data->op_offset;
2236 int ncfspgs; /* pages read in PAGE_CACHE_SIZE */
2237 int nlupgs; /* pages read in LU_PAGE_SIZE */
2238 struct lmv_tgt_desc *tgt;
2241 rc = lmv_check_connect(obd);
2245 CDEBUG(D_INODE, "READPAGE at "LPX64" from "DFID"\n",
2246 offset, PFID(&op_data->op_fid1));
2248 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2250 RETURN(PTR_ERR(tgt));
2252 rc = md_readpage(tgt->ltd_exp, op_data, pages, request);
2256 ncfspgs = ((*request)->rq_bulk->bd_nob_transferred +
2257 PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
2258 nlupgs = (*request)->rq_bulk->bd_nob_transferred >> LU_PAGE_SHIFT;
2259 LASSERT(!((*request)->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
2260 LASSERT(ncfspgs > 0 && ncfspgs <= op_data->op_npages);
2262 CDEBUG(D_INODE, "read %d(%d)/%d pages\n", ncfspgs, nlupgs,
2263 op_data->op_npages);
2265 lmv_adjust_dirpages(pages, ncfspgs, nlupgs);
2270 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2271 struct ptlrpc_request **request)
2273 struct obd_device *obd = exp->exp_obd;
2274 struct lmv_obd *lmv = &obd->u.lmv;
2275 struct lmv_tgt_desc *tgt = NULL;
2276 struct mdt_body *body;
2280 rc = lmv_check_connect(obd);
2284 /* Send unlink requests to the MDT where the child is located */
2285 if (likely(!fid_is_zero(&op_data->op_fid2)))
2286 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
2288 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
2290 RETURN(PTR_ERR(tgt));
2292 op_data->op_fsuid = cfs_curproc_fsuid();
2293 op_data->op_fsgid = cfs_curproc_fsgid();
2294 op_data->op_cap = cfs_curproc_cap_pack();
2297 * If child's fid is given, cancel unused locks for it if it is from
2298 * another export than parent.
2300 * LOOKUP lock for child (fid3) should also be cancelled on parent
2301 * tgt_tgt in mdc_unlink().
2303 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2306 * Cancel FULL locks on child (fid3).
2308 rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2309 MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2314 CDEBUG(D_INODE, "unlink with fid="DFID"/"DFID" -> mds #%d\n",
2315 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2), tgt->ltd_idx);
2317 rc = md_unlink(tgt->ltd_exp, op_data, request);
2318 if (rc != 0 && rc != -EREMOTE)
2321 body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2325 /* Not cross-ref case, just get out of here. */
2326 if (likely(!(body->valid & OBD_MD_MDS)))
2329 CDEBUG(D_INODE, "%s: try unlink to another MDT for "DFID"\n",
2330 exp->exp_obd->obd_name, PFID(&body->fid1));
2332 /* This is a remote object, try remote MDT, Note: it may
2333 * try more than 1 time here, Considering following case
2334 * /mnt/lustre is root on MDT0, remote1 is on MDT1
2335 * 1. Initially A does not know where remote1 is, it send
2336 * unlink RPC to MDT0, MDT0 return -EREMOTE, it will
2337 * resend unlink RPC to MDT1 (retry 1st time).
2339 * 2. During the unlink RPC in flight,
2340 * client B mv /mnt/lustre/remote1 /mnt/lustre/remote2
2341 * and create new remote1, but on MDT0
2343 * 3. MDT1 get unlink RPC(from A), then do remote lock on
2344 * /mnt/lustre, then lookup get fid of remote1, and find
2345 * it is remote dir again, and replay -EREMOTE again.
2347 * 4. Then A will resend unlink RPC to MDT0. (retry 2nd times).
2349 * In theory, it might try unlimited time here, but it should
2350 * be very rare case. */
2351 op_data->op_fid2 = body->fid1;
2352 ptlrpc_req_finished(*request);
2358 static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2360 struct lmv_obd *lmv = &obd->u.lmv;
2364 case OBD_CLEANUP_EARLY:
2365 /* XXX: here should be calling obd_precleanup() down to
2368 case OBD_CLEANUP_EXPORTS:
2369 fld_client_proc_fini(&lmv->lmv_fld);
2370 lprocfs_obd_cleanup(obd);
2378 static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
2379 __u32 keylen, void *key, __u32 *vallen, void *val,
2380 struct lov_stripe_md *lsm)
2382 struct obd_device *obd;
2383 struct lmv_obd *lmv;
2387 obd = class_exp2obd(exp);
2389 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2390 exp->exp_handle.h_cookie);
2395 if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2396 struct lmv_tgt_desc *tgt;
2399 rc = lmv_check_connect(obd);
2403 LASSERT(*vallen == sizeof(__u32));
2404 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2407 * All tgts should be connected when this gets called.
2409 if (tgt == NULL || tgt->ltd_exp == NULL)
2412 if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
2417 } else if (KEY_IS(KEY_MAX_EASIZE) || KEY_IS(KEY_CONN_DATA)) {
2418 rc = lmv_check_connect(obd);
2423 * Forwarding this request to first MDS, it should know LOV
2426 rc = obd_get_info(env, lmv->tgts[0]->ltd_exp, keylen, key,
2428 if (!rc && KEY_IS(KEY_CONN_DATA))
2429 exp->exp_connect_data = *(struct obd_connect_data *)val;
2431 } else if (KEY_IS(KEY_TGT_COUNT)) {
2432 *((int *)val) = lmv->desc.ld_tgt_count;
2436 CDEBUG(D_IOCTL, "Invalid key\n");
2440 int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
2441 obd_count keylen, void *key, obd_count vallen,
2442 void *val, struct ptlrpc_request_set *set)
2444 struct lmv_tgt_desc *tgt;
2445 struct obd_device *obd;
2446 struct lmv_obd *lmv;
2450 obd = class_exp2obd(exp);
2452 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2453 exp->exp_handle.h_cookie);
2458 if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX)) {
2461 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2464 if (tgt == NULL || tgt->ltd_exp == NULL)
2467 err = obd_set_info_async(env, tgt->ltd_exp,
2468 keylen, key, vallen, val, set);
2479 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
2480 struct lov_stripe_md *lsm)
2482 struct obd_device *obd = class_exp2obd(exp);
2483 struct lmv_obd *lmv = &obd->u.lmv;
2484 struct lmv_stripe_md *meap;
2485 struct lmv_stripe_md *lsmp;
2490 mea_size = lmv_get_easize(lmv);
2494 if (*lmmp && !lsm) {
2495 OBD_FREE_LARGE(*lmmp, mea_size);
2500 if (*lmmp == NULL) {
2501 OBD_ALLOC_LARGE(*lmmp, mea_size);
2509 lsmp = (struct lmv_stripe_md *)lsm;
2510 meap = (struct lmv_stripe_md *)*lmmp;
2512 if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
2513 lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
2516 meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
2517 meap->mea_count = cpu_to_le32(lsmp->mea_count);
2518 meap->mea_master = cpu_to_le32(lsmp->mea_master);
2520 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2521 meap->mea_ids[i] = lsmp->mea_ids[i];
2522 fid_cpu_to_le(&meap->mea_ids[i], &lsmp->mea_ids[i]);
2528 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
2529 struct lov_mds_md *lmm, int lmm_size)
2531 struct obd_device *obd = class_exp2obd(exp);
2532 struct lmv_stripe_md **tmea = (struct lmv_stripe_md **)lsmp;
2533 struct lmv_stripe_md *mea = (struct lmv_stripe_md *)lmm;
2534 struct lmv_obd *lmv = &obd->u.lmv;
2540 mea_size = lmv_get_easize(lmv);
2544 if (*lsmp != NULL && lmm == NULL) {
2545 OBD_FREE_LARGE(*tmea, mea_size);
2550 LASSERT(mea_size == lmm_size);
2552 OBD_ALLOC_LARGE(*tmea, mea_size);
2559 if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
2560 mea->mea_magic == MEA_MAGIC_ALL_CHARS ||
2561 mea->mea_magic == MEA_MAGIC_HASH_SEGMENT)
2563 magic = le32_to_cpu(mea->mea_magic);
2566 * Old mea is not handled here.
2568 CERROR("Old not supportable EA is found\n");
2572 (*tmea)->mea_magic = magic;
2573 (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
2574 (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
2576 for (i = 0; i < (*tmea)->mea_count; i++) {
2577 (*tmea)->mea_ids[i] = mea->mea_ids[i];
2578 fid_le_to_cpu(&(*tmea)->mea_ids[i], &(*tmea)->mea_ids[i]);
2583 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
2584 ldlm_policy_data_t *policy, ldlm_mode_t mode,
2585 ldlm_cancel_flags_t flags, void *opaque)
2587 struct obd_device *obd = exp->exp_obd;
2588 struct lmv_obd *lmv = &obd->u.lmv;
2594 LASSERT(fid != NULL);
2596 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2597 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL ||
2598 lmv->tgts[i]->ltd_active == 0)
2601 err = md_cancel_unused(lmv->tgts[i]->ltd_exp, fid,
2602 policy, mode, flags, opaque);
2609 int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
2612 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2616 rc = md_set_lock_data(lmv->tgts[0]->ltd_exp, lockh, data, bits);
2620 ldlm_mode_t lmv_lock_match(struct obd_export *exp, __u64 flags,
2621 const struct lu_fid *fid, ldlm_type_t type,
2622 ldlm_policy_data_t *policy, ldlm_mode_t mode,
2623 struct lustre_handle *lockh)
2625 struct obd_device *obd = exp->exp_obd;
2626 struct lmv_obd *lmv = &obd->u.lmv;
2631 CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
2634 * With CMD every object can have two locks in different namespaces:
2635 * lookup lock in space of mds storing direntry and update/open lock in
2636 * space of mds storing inode. Thus we check all targets, not only that
2637 * one fid was created in.
2639 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2640 if (lmv->tgts[i] == NULL ||
2641 lmv->tgts[i]->ltd_exp == NULL ||
2642 lmv->tgts[i]->ltd_active == 0)
2645 rc = md_lock_match(lmv->tgts[i]->ltd_exp, flags, fid,
2646 type, policy, mode, lockh);
2654 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
2655 struct obd_export *dt_exp, struct obd_export *md_exp,
2656 struct lustre_md *md)
2658 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2660 return md_get_lustre_md(lmv->tgts[0]->ltd_exp, req, dt_exp, md_exp, md);
2663 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
2665 struct obd_device *obd = exp->exp_obd;
2666 struct lmv_obd *lmv = &obd->u.lmv;
2670 obd_free_memmd(exp, (void *)&md->mea);
2671 RETURN(md_free_lustre_md(lmv->tgts[0]->ltd_exp, md));
2674 int lmv_set_open_replay_data(struct obd_export *exp,
2675 struct obd_client_handle *och,
2676 struct ptlrpc_request *open_req)
2678 struct obd_device *obd = exp->exp_obd;
2679 struct lmv_obd *lmv = &obd->u.lmv;
2680 struct lmv_tgt_desc *tgt;
2683 tgt = lmv_find_target(lmv, &och->och_fid);
2685 RETURN(PTR_ERR(tgt));
2687 RETURN(md_set_open_replay_data(tgt->ltd_exp, och, open_req));
2690 int lmv_clear_open_replay_data(struct obd_export *exp,
2691 struct obd_client_handle *och)
2693 struct obd_device *obd = exp->exp_obd;
2694 struct lmv_obd *lmv = &obd->u.lmv;
2695 struct lmv_tgt_desc *tgt;
2698 tgt = lmv_find_target(lmv, &och->och_fid);
2700 RETURN(PTR_ERR(tgt));
2702 RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
2705 static int lmv_get_remote_perm(struct obd_export *exp,
2706 const struct lu_fid *fid,
2707 struct obd_capa *oc, __u32 suppgid,
2708 struct ptlrpc_request **request)
2710 struct obd_device *obd = exp->exp_obd;
2711 struct lmv_obd *lmv = &obd->u.lmv;
2712 struct lmv_tgt_desc *tgt;
2716 rc = lmv_check_connect(obd);
2720 tgt = lmv_find_target(lmv, fid);
2722 RETURN(PTR_ERR(tgt));
2724 rc = md_get_remote_perm(tgt->ltd_exp, fid, oc, suppgid, request);
2728 static int lmv_renew_capa(struct obd_export *exp, struct obd_capa *oc,
2731 struct obd_device *obd = exp->exp_obd;
2732 struct lmv_obd *lmv = &obd->u.lmv;
2733 struct lmv_tgt_desc *tgt;
2737 rc = lmv_check_connect(obd);
2741 tgt = lmv_find_target(lmv, &oc->c_capa.lc_fid);
2743 RETURN(PTR_ERR(tgt));
2745 rc = md_renew_capa(tgt->ltd_exp, oc, cb);
2749 int lmv_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
2750 const struct req_msg_field *field, struct obd_capa **oc)
2752 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2754 return md_unpack_capa(lmv->tgts[0]->ltd_exp, req, field, oc);
2757 int lmv_intent_getattr_async(struct obd_export *exp,
2758 struct md_enqueue_info *minfo,
2759 struct ldlm_enqueue_info *einfo)
2761 struct md_op_data *op_data = &minfo->mi_data;
2762 struct obd_device *obd = exp->exp_obd;
2763 struct lmv_obd *lmv = &obd->u.lmv;
2764 struct lmv_tgt_desc *tgt = NULL;
2768 rc = lmv_check_connect(obd);
2772 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2774 RETURN(PTR_ERR(tgt));
2776 rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
2780 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
2781 struct lu_fid *fid, __u64 *bits)
2783 struct obd_device *obd = exp->exp_obd;
2784 struct lmv_obd *lmv = &obd->u.lmv;
2785 struct lmv_tgt_desc *tgt;
2789 rc = lmv_check_connect(obd);
2793 tgt = lmv_find_target(lmv, fid);
2795 RETURN(PTR_ERR(tgt));
2797 rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
2802 * For lmv, only need to send request to master MDT, and the master MDT will
2803 * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
2804 * we directly fetch data from the slave MDTs.
2806 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
2807 struct obd_quotactl *oqctl)
2809 struct obd_device *obd = class_exp2obd(exp);
2810 struct lmv_obd *lmv = &obd->u.lmv;
2811 struct lmv_tgt_desc *tgt = lmv->tgts[0];
2813 __u64 curspace, curinodes;
2816 if (!lmv->desc.ld_tgt_count || !tgt->ltd_active) {
2817 CERROR("master lmv inactive\n");
2821 if (oqctl->qc_cmd != Q_GETOQUOTA) {
2822 rc = obd_quotactl(tgt->ltd_exp, oqctl);
2826 curspace = curinodes = 0;
2827 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2831 if (tgt == NULL || tgt->ltd_exp == NULL || tgt->ltd_active == 0)
2833 if (!tgt->ltd_active) {
2834 CDEBUG(D_HA, "mdt %d is inactive.\n", i);
2838 err = obd_quotactl(tgt->ltd_exp, oqctl);
2840 CERROR("getquota on mdt %d failed. %d\n", i, err);
2844 curspace += oqctl->qc_dqblk.dqb_curspace;
2845 curinodes += oqctl->qc_dqblk.dqb_curinodes;
2848 oqctl->qc_dqblk.dqb_curspace = curspace;
2849 oqctl->qc_dqblk.dqb_curinodes = curinodes;
2854 int lmv_quotacheck(struct obd_device *unused, struct obd_export *exp,
2855 struct obd_quotactl *oqctl)
2857 struct obd_device *obd = class_exp2obd(exp);
2858 struct lmv_obd *lmv = &obd->u.lmv;
2859 struct lmv_tgt_desc *tgt;
2863 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2866 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active) {
2867 CERROR("lmv idx %d inactive\n", i);
2871 err = obd_quotacheck(tgt->ltd_exp, oqctl);
2879 struct obd_ops lmv_obd_ops = {
2880 .o_owner = THIS_MODULE,
2881 .o_setup = lmv_setup,
2882 .o_cleanup = lmv_cleanup,
2883 .o_precleanup = lmv_precleanup,
2884 .o_process_config = lmv_process_config,
2885 .o_connect = lmv_connect,
2886 .o_disconnect = lmv_disconnect,
2887 .o_statfs = lmv_statfs,
2888 .o_get_info = lmv_get_info,
2889 .o_set_info_async = lmv_set_info_async,
2890 .o_packmd = lmv_packmd,
2891 .o_unpackmd = lmv_unpackmd,
2892 .o_notify = lmv_notify,
2893 .o_get_uuid = lmv_get_uuid,
2894 .o_iocontrol = lmv_iocontrol,
2895 .o_quotacheck = lmv_quotacheck,
2896 .o_quotactl = lmv_quotactl
2899 struct md_ops lmv_md_ops = {
2900 .m_getstatus = lmv_getstatus,
2901 .m_null_inode = lmv_null_inode,
2902 .m_find_cbdata = lmv_find_cbdata,
2903 .m_close = lmv_close,
2904 .m_create = lmv_create,
2905 .m_done_writing = lmv_done_writing,
2906 .m_enqueue = lmv_enqueue,
2907 .m_getattr = lmv_getattr,
2908 .m_getxattr = lmv_getxattr,
2909 .m_getattr_name = lmv_getattr_name,
2910 .m_intent_lock = lmv_intent_lock,
2912 .m_rename = lmv_rename,
2913 .m_setattr = lmv_setattr,
2914 .m_setxattr = lmv_setxattr,
2916 .m_readpage = lmv_readpage,
2917 .m_unlink = lmv_unlink,
2918 .m_init_ea_size = lmv_init_ea_size,
2919 .m_cancel_unused = lmv_cancel_unused,
2920 .m_set_lock_data = lmv_set_lock_data,
2921 .m_lock_match = lmv_lock_match,
2922 .m_get_lustre_md = lmv_get_lustre_md,
2923 .m_free_lustre_md = lmv_free_lustre_md,
2924 .m_set_open_replay_data = lmv_set_open_replay_data,
2925 .m_clear_open_replay_data = lmv_clear_open_replay_data,
2926 .m_renew_capa = lmv_renew_capa,
2927 .m_unpack_capa = lmv_unpack_capa,
2928 .m_get_remote_perm = lmv_get_remote_perm,
2929 .m_intent_getattr_async = lmv_intent_getattr_async,
2930 .m_revalidate_lock = lmv_revalidate_lock
2933 int __init lmv_init(void)
2935 struct lprocfs_static_vars lvars;
2938 lprocfs_lmv_init_vars(&lvars);
2940 rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
2941 lvars.module_vars, LUSTRE_LMV_NAME, NULL);
2946 static void lmv_exit(void)
2948 class_unregister_type(LUSTRE_LMV_NAME);
2951 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2952 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
2953 MODULE_LICENSE("GPL");
2955 module_init(lmv_init);
2956 module_exit(lmv_exit);