1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 # define EXPORT_SYMTAB
40 #define DEBUG_SUBSYSTEM S_LMV
42 #include <linux/slab.h>
43 #include <linux/module.h>
44 #include <linux/init.h>
45 #include <linux/slab.h>
46 #include <linux/pagemap.h>
48 #include <asm/div64.h>
49 #include <linux/seq_file.h>
50 #include <linux/namei.h>
52 #include <liblustre.h>
55 #include <lustre/lustre_idl.h>
56 #include <lustre_log.h>
57 #include <obd_support.h>
58 #include <lustre_lib.h>
59 #include <lustre_net.h>
60 #include <obd_class.h>
61 #include <lprocfs_status.h>
62 #include <lustre_lite.h>
63 #include <lustre_fid.h>
64 #include "lmv_internal.h"
67 cfs_mem_cache_t *lmv_object_cache;
68 atomic_t lmv_object_count = ATOMIC_INIT(0);
70 static void lmv_activate_target(struct lmv_obd *lmv,
71 struct lmv_tgt_desc *tgt,
74 if (tgt->ltd_active == activate)
77 tgt->ltd_active = activate;
78 lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
84 * -EINVAL : UUID can't be found in the LMV's target list
85 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
86 * -EBADF : The UUID is found, but the OBD of the wrong type (!)
88 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
91 struct lmv_tgt_desc *tgt;
92 struct obd_device *obd;
97 CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
98 lmv, uuid->uuid, activate);
100 spin_lock(&lmv->lmv_lock);
101 for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
102 if (tgt->ltd_exp == NULL)
105 CDEBUG(D_INFO, "Target idx %d is %s conn "LPX64"\n",
106 i, tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
108 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
112 if (i == lmv->desc.ld_tgt_count)
113 GOTO(out_lmv_lock, rc = -EINVAL);
115 obd = class_exp2obd(tgt->ltd_exp);
117 GOTO(out_lmv_lock, rc = -ENOTCONN);
119 CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
120 obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
121 obd->obd_type->typ_name, i);
122 LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
124 if (tgt->ltd_active == activate) {
125 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
126 activate ? "" : "in");
127 GOTO(out_lmv_lock, rc);
130 CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
131 activate ? "" : "in");
132 lmv_activate_target(lmv, tgt, activate);
136 spin_unlock(&lmv->lmv_lock);
140 static int lmv_set_mdc_data(struct lmv_obd *lmv, struct obd_uuid *uuid,
141 struct obd_connect_data *data)
143 struct lmv_tgt_desc *tgt;
147 LASSERT(data != NULL);
149 spin_lock(&lmv->lmv_lock);
150 for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
151 if (tgt->ltd_exp == NULL)
154 if (obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
155 lmv->datas[tgt->ltd_idx] = *data;
159 spin_unlock(&lmv->lmv_lock);
163 struct obd_uuid *lmv_get_uuid(struct obd_export *exp) {
164 struct obd_device *obd = exp->exp_obd;
165 struct lmv_obd *lmv = &obd->u.lmv;
166 return obd_get_uuid(lmv->tgts[0].ltd_exp);
169 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
170 enum obd_notify_event ev, void *data)
172 struct obd_connect_data *conn_data;
173 struct lmv_obd *lmv = &obd->u.lmv;
174 struct obd_uuid *uuid;
178 if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
179 CERROR("unexpected notification of %s %s!\n",
180 watched->obd_type->typ_name,
185 uuid = &watched->u.cli.cl_target_uuid;
186 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
188 * Set MDC as active before notifying the observer, so the
189 * observer can use the MDC normally.
191 rc = lmv_set_mdc_active(lmv, uuid,
192 ev == OBD_NOTIFY_ACTIVE);
194 CERROR("%sactivation of %s failed: %d\n",
195 ev == OBD_NOTIFY_ACTIVE ? "" : "de",
199 } else if (ev == OBD_NOTIFY_OCD) {
200 conn_data = &watched->u.cli.cl_import->imp_connect_data;
203 * Set connect data to desired target, update exp_connect_flags.
205 rc = lmv_set_mdc_data(lmv, uuid, conn_data);
207 CERROR("can't set connect data to target %s, rc %d\n",
213 * XXX: Make sure that ocd_connect_flags from all targets are
214 * the same. Otherwise one of MDTs runs wrong version or
215 * something like this. --umka
217 obd->obd_self_export->exp_connect_flags =
218 conn_data->ocd_connect_flags;
221 else if (ev == OBD_NOTIFY_DISCON) {
223 * For disconnect event, flush fld cache for failout MDS case.
225 fld_client_flush(&lmv->lmv_fld);
229 * Pass the notification up the chain.
231 if (obd->obd_observer)
232 rc = obd_notify(obd->obd_observer, watched, ev, data);
238 * This is fake connect function. Its purpose is to initialize lmv and say
239 * caller that everything is okay. Real connection will be performed later.
241 static int lmv_connect(const struct lu_env *env,
242 struct obd_export **exp, struct obd_device *obd,
243 struct obd_uuid *cluuid, struct obd_connect_data *data,
247 struct proc_dir_entry *lmv_proc_dir;
249 struct lmv_obd *lmv = &obd->u.lmv;
250 struct lustre_handle conn = { 0 };
255 * We don't want to actually do the underlying connections more than
256 * once, so keep track.
259 if (lmv->refcount > 1) {
264 rc = class_connect(&conn, obd, cluuid);
266 CERROR("class_connection() returned %d\n", rc);
270 *exp = class_conn2export(&conn);
271 class_export_get(*exp);
275 lmv->cluuid = *cluuid;
278 lmv->conn_data = *data;
281 lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
283 if (IS_ERR(lmv_proc_dir)) {
284 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
285 obd->obd_type->typ_name, obd->obd_name);
291 * All real clients should perform actual connection right away, because
292 * it is possible, that LMV will not have opportunity to connect targets
293 * and MDC stuff will be called directly, for instance while reading
294 * ../mdc/../kbytesfree procfs file, etc.
296 if (data->ocd_connect_flags & OBD_CONNECT_REAL)
297 rc = lmv_check_connect(obd);
302 lprocfs_remove(&lmv_proc_dir);
309 static void lmv_set_timeouts(struct obd_device *obd)
311 struct lmv_tgt_desc *tgts;
316 if (lmv->server_timeout == 0)
319 if (lmv->connected == 0)
322 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
323 if (tgts->ltd_exp == NULL)
326 obd_set_info_async(tgts->ltd_exp, sizeof(KEY_INTERMDS),
327 KEY_INTERMDS, 0, NULL, NULL);
331 static int lmv_init_ea_size(struct obd_export *exp, int easize,
332 int def_easize, int cookiesize)
334 struct obd_device *obd = exp->exp_obd;
335 struct lmv_obd *lmv = &obd->u.lmv;
341 if (lmv->max_easize < easize) {
342 lmv->max_easize = easize;
345 if (lmv->max_def_easize < def_easize) {
346 lmv->max_def_easize = def_easize;
349 if (lmv->max_cookiesize < cookiesize) {
350 lmv->max_cookiesize = cookiesize;
356 if (lmv->connected == 0)
359 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
360 if (lmv->tgts[i].ltd_exp == NULL) {
361 CWARN("%s: NULL export for %d\n", obd->obd_name, i);
365 rc = md_init_ea_size(lmv->tgts[i].ltd_exp, easize, def_easize,
368 CERROR("obd_init_ea_size() failed on MDT target %d, "
369 "error %d.\n", i, rc);
376 #define MAX_STRING_SIZE 128
378 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
381 struct proc_dir_entry *lmv_proc_dir;
383 struct lmv_obd *lmv = &obd->u.lmv;
384 struct obd_uuid *cluuid = &lmv->cluuid;
385 struct obd_connect_data *mdc_data = NULL;
386 struct obd_uuid lmv_mdc_uuid = { "LMV_MDC_UUID" };
387 struct obd_device *mdc_obd;
388 struct obd_export *mdc_exp;
389 struct lu_fld_target target;
393 mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
396 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
400 CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
401 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
402 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
405 if (!mdc_obd->obd_set_up) {
406 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
410 rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
411 &lmv->conn_data, NULL);
413 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
418 * Init fid sequence client for this mdc and add new fld target.
420 rc = obd_fid_init(mdc_exp);
424 target.ft_srv = NULL;
425 target.ft_exp = mdc_exp;
426 target.ft_idx = tgt->ltd_idx;
428 fld_client_add_target(&lmv->lmv_fld, &target);
430 mdc_data = &class_exp2cliimp(mdc_exp)->imp_connect_data;
432 rc = obd_register_observer(mdc_obd, obd);
434 obd_disconnect(mdc_exp);
435 CERROR("target %s register_observer error %d\n",
436 tgt->ltd_uuid.uuid, rc);
440 if (obd->obd_observer) {
442 * Tell the observer about the new target.
444 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
445 OBD_NOTIFY_ACTIVE, (void *)(tgt - lmv->tgts));
447 obd_disconnect(mdc_exp);
453 tgt->ltd_exp = mdc_exp;
454 lmv->desc.ld_active_tgt_count++;
457 * Copy connect data, it may be used later.
459 lmv->datas[tgt->ltd_idx] = *mdc_data;
461 md_init_ea_size(tgt->ltd_exp, lmv->max_easize,
462 lmv->max_def_easize, lmv->max_cookiesize);
464 CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
465 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
466 atomic_read(&obd->obd_refcount));
469 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
471 struct proc_dir_entry *mdc_symlink;
472 char name[MAX_STRING_SIZE + 1];
474 LASSERT(mdc_obd->obd_type != NULL);
475 LASSERT(mdc_obd->obd_type->typ_name != NULL);
476 name[MAX_STRING_SIZE] = '\0';
477 snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
478 mdc_obd->obd_type->typ_name,
480 mdc_symlink = proc_symlink(mdc_obd->obd_name,
482 if (mdc_symlink == NULL) {
483 CERROR("Could not register LMV target "
484 "/proc/fs/lustre/%s/%s/target_obds/%s.",
485 obd->obd_type->typ_name, obd->obd_name,
487 lprocfs_remove(&lmv_proc_dir);
495 int lmv_add_target(struct obd_device *obd, struct obd_uuid *tgt_uuid)
497 struct lmv_obd *lmv = &obd->u.lmv;
498 struct lmv_tgt_desc *tgt;
502 CDEBUG(D_CONFIG, "Target uuid: %s.\n", tgt_uuid->uuid);
506 if (lmv->desc.ld_active_tgt_count >= LMV_MAX_TGT_COUNT) {
507 lmv_init_unlock(lmv);
508 CERROR("Can't add %s, LMV module compiled for %d MDCs. "
509 "That many MDCs already configured.\n",
510 tgt_uuid->uuid, LMV_MAX_TGT_COUNT);
513 if (lmv->desc.ld_tgt_count == 0) {
514 struct obd_device *mdc_obd;
516 mdc_obd = class_find_client_obd(tgt_uuid, LUSTRE_MDC_NAME,
519 lmv_init_unlock(lmv);
520 CERROR("Target %s not attached\n", tgt_uuid->uuid);
524 rc = obd_llog_init(obd, &obd->obd_olg, mdc_obd, NULL);
526 lmv_init_unlock(lmv);
527 CERROR("lmv failed to setup llogging subsystems\n");
530 spin_lock(&lmv->lmv_lock);
531 tgt = lmv->tgts + lmv->desc.ld_tgt_count++;
532 tgt->ltd_uuid = *tgt_uuid;
533 spin_unlock(&lmv->lmv_lock);
535 if (lmv->connected) {
536 rc = lmv_connect_mdc(obd, tgt);
538 spin_lock(&lmv->lmv_lock);
539 lmv->desc.ld_tgt_count--;
540 memset(tgt, 0, sizeof(*tgt));
541 spin_unlock(&lmv->lmv_lock);
543 int easize = sizeof(struct lmv_stripe_md) +
544 lmv->desc.ld_tgt_count *
545 sizeof(struct lu_fid);
546 lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
550 lmv_init_unlock(lmv);
554 int lmv_check_connect(struct obd_device *obd)
556 struct lmv_obd *lmv = &obd->u.lmv;
557 struct lmv_tgt_desc *tgt;
567 if (lmv->connected) {
568 lmv_init_unlock(lmv);
572 if (lmv->desc.ld_tgt_count == 0) {
573 CERROR("%s: no targets configured.\n", obd->obd_name);
577 CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
578 lmv->cluuid.uuid, obd->obd_name);
580 LASSERT(lmv->tgts != NULL);
582 for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
583 rc = lmv_connect_mdc(obd, tgt);
588 lmv_set_timeouts(obd);
589 class_export_put(lmv->exp);
591 easize = lmv_get_easize(lmv);
592 lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
593 lmv_init_unlock(lmv);
602 --lmv->desc.ld_active_tgt_count;
603 rc2 = obd_disconnect(tgt->ltd_exp);
605 CERROR("LMV target %s disconnect on "
606 "MDC idx %d: error %d\n",
607 tgt->ltd_uuid.uuid, i, rc2);
611 class_disconnect(lmv->exp);
612 lmv_init_unlock(lmv);
616 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
619 struct proc_dir_entry *lmv_proc_dir;
621 struct lmv_obd *lmv = &obd->u.lmv;
622 struct obd_device *mdc_obd;
626 LASSERT(tgt != NULL);
627 LASSERT(obd != NULL);
629 mdc_obd = class_exp2obd(tgt->ltd_exp);
632 mdc_obd->obd_no_recov = obd->obd_no_recov;
635 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
637 struct proc_dir_entry *mdc_symlink;
639 mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
641 lprocfs_remove(&mdc_symlink);
643 CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
644 obd->obd_type->typ_name, obd->obd_name,
649 rc = obd_fid_fini(tgt->ltd_exp);
651 CERROR("Can't finanize fids factory\n");
653 CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
654 tgt->ltd_exp->exp_obd->obd_name,
655 tgt->ltd_exp->exp_obd->obd_uuid.uuid);
657 obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
658 rc = obd_disconnect(tgt->ltd_exp);
660 if (tgt->ltd_active) {
661 CERROR("Target %s disconnect error %d\n",
662 tgt->ltd_uuid.uuid, rc);
666 lmv_activate_target(lmv, tgt, 0);
671 static int lmv_disconnect(struct obd_export *exp)
673 struct obd_device *obd = class_exp2obd(exp);
675 struct proc_dir_entry *lmv_proc_dir;
677 struct lmv_obd *lmv = &obd->u.lmv;
686 * Only disconnect the underlying layers on the final disconnect.
689 if (lmv->refcount != 0)
692 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
693 if (lmv->tgts[i].ltd_exp == NULL)
695 lmv_disconnect_mdc(obd, &lmv->tgts[i]);
699 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
701 lprocfs_remove(&lmv_proc_dir);
703 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
704 obd->obd_type->typ_name, obd->obd_name);
710 * This is the case when no real connection is established by
711 * lmv_check_connect().
714 class_export_put(exp);
715 rc = class_disconnect(exp);
716 if (lmv->refcount == 0)
721 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
722 int len, void *karg, void *uarg)
724 struct obd_device *obddev = class_exp2obd(exp);
725 struct lmv_obd *lmv = &obddev->u.lmv;
729 int count = lmv->desc.ld_tgt_count;
736 case IOC_OBD_STATFS: {
737 struct obd_ioctl_data *data = karg;
738 struct obd_device *mdc_obd;
739 struct obd_statfs stat_buf = {0};
742 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
743 LASSERT(data->ioc_plen1 == sizeof(struct obd_statfs));
745 if ((index >= count))
748 if (!lmv->tgts[index].ltd_active)
751 mdc_obd = class_exp2obd(lmv->tgts[index].ltd_exp);
755 rc = obd_statfs(mdc_obd, &stat_buf,
756 cfs_time_current_64() - HZ, 0);
759 if (copy_to_user(data->ioc_pbuf1, &stat_buf, data->ioc_plen1))
761 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
766 case OBD_IOC_QUOTACTL: {
767 struct if_quotactl *qctl = karg;
768 struct lmv_tgt_desc *tgt = NULL;
769 struct obd_quotactl *oqctl;
771 if (qctl->qc_valid == QC_MDTIDX) {
772 if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
775 tgt = &lmv->tgts[qctl->qc_idx];
778 } else if (qctl->qc_valid == QC_UUID) {
779 for (i = 0; i < count; i++) {
781 if (!obd_uuid_equals(&tgt->ltd_uuid,
785 if (tgt->ltd_exp == NULL)
797 LASSERT(tgt && tgt->ltd_exp);
798 OBD_ALLOC_PTR(oqctl);
802 QCTL_COPY(oqctl, qctl);
803 rc = obd_quotactl(tgt->ltd_exp, oqctl);
805 QCTL_COPY(qctl, oqctl);
806 qctl->qc_valid = QC_MDTIDX;
807 qctl->obd_uuid = tgt->ltd_uuid;
812 case OBD_IOC_CHANGELOG_CLEAR: {
813 struct ioc_changelog_clear *icc = karg;
815 if (icc->icc_mdtindex >= count)
818 rc = obd_iocontrol(cmd, lmv->tgts[icc->icc_mdtindex].ltd_exp,
819 sizeof(*icc), icc, NULL);
824 for (i = 0; i < count; i++) {
827 if (lmv->tgts[i].ltd_exp == NULL)
830 err = obd_iocontrol(cmd, lmv->tgts[i].ltd_exp, len,
832 if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
835 if (lmv->tgts[i].ltd_active) {
836 CERROR("error: iocontrol MDC %s on MDT"
837 "idx %d cmd %x: err = %d\n",
838 lmv->tgts[i].ltd_uuid.uuid,
853 static int lmv_all_chars_policy(int count, const char *name,
864 static int lmv_nid_policy(struct lmv_obd *lmv)
866 struct obd_import *imp;
870 * XXX: To get nid we assume that underlying obd device is mdc.
872 imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
873 id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
874 return id % lmv->desc.ld_tgt_count;
877 static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
878 placement_policy_t placement)
881 case PLACEMENT_CHAR_POLICY:
882 return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
884 op_data->op_namelen);
885 case PLACEMENT_NID_POLICY:
886 return lmv_nid_policy(lmv);
892 CERROR("Unsupported placement policy %x\n", placement);
897 * This is _inode_ placement policy function (not name).
899 static int lmv_placement_policy(struct obd_device *obd,
900 struct md_op_data *op_data,
903 struct lmv_obd *lmv = &obd->u.lmv;
904 struct lmv_object *obj;
908 LASSERT(mds != NULL);
910 if (lmv->desc.ld_tgt_count == 1) {
916 * Allocate new fid on target according to operation type and parent
919 obj = lmv_object_find(obd, &op_data->op_fid1);
920 if (obj != NULL || op_data->op_name == NULL ||
921 op_data->op_opc != LUSTRE_OPC_MKDIR) {
923 * Allocate fid for non-dir or for null name or for case parent
930 * If we have this flag turned on, and we see that
931 * parent dir is split, this means, that caller did not
932 * notice split yet. This is race and we would like to
933 * let caller know that.
935 if (op_data->op_bias & MDS_CHECK_SPLIT)
940 * Allocate new fid on same mds where parent fid is located and
941 * where operation will be sent. In case of split dir, ->op_fid1
942 * and ->op_mds here will contain fid and mds of slave directory
943 * object (assigned by caller).
945 *mds = op_data->op_mds;
949 * Parent directory is not split and we want to create a
950 * directory in it. Let's calculate where to place it according
951 * to operation data @op_data.
953 *mds = lmv_choose_mds(lmv, op_data, lmv->lmv_placement);
958 CERROR("Can't choose MDS, err = %d\n", rc);
960 LASSERT(*mds < lmv->desc.ld_tgt_count);
966 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid,
969 struct lmv_tgt_desc *tgt;
973 tgt = lmv_get_target(lmv, mds);
976 * New seq alloc and FLD setup should be atomic. Otherwise we may find
977 * on server that seq in new allocated fid is not yet known.
979 down(&tgt->ltd_fid_sem);
981 if (!tgt->ltd_active)
982 GOTO(out, rc = -ENODEV);
985 * Asking underlaying tgt layer to allocate new fid.
987 rc = obd_fid_alloc(tgt->ltd_exp, fid, NULL);
989 LASSERT(fid_is_sane(fid));
995 up(&tgt->ltd_fid_sem);
999 int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1000 struct md_op_data *op_data)
1002 struct obd_device *obd = class_exp2obd(exp);
1003 struct lmv_obd *lmv = &obd->u.lmv;
1008 LASSERT(op_data != NULL);
1009 LASSERT(fid != NULL);
1011 rc = lmv_placement_policy(obd, op_data, &mds);
1013 CERROR("Can't get target for allocating fid, "
1018 rc = __lmv_fid_alloc(lmv, fid, mds);
1020 CERROR("Can't alloc new fid, rc %d\n", rc);
1027 static int lmv_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
1030 LASSERT(exp != NULL && fid != NULL);
1031 if (lmv_object_delete(exp, fid)) {
1032 CDEBUG(D_INODE, "Object "DFID" is destroyed.\n",
1038 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1040 struct lmv_obd *lmv = &obd->u.lmv;
1041 struct lprocfs_static_vars lvars;
1042 struct lmv_desc *desc;
1047 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1048 CERROR("LMV setup requires a descriptor\n");
1052 desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1053 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1054 CERROR("Lmv descriptor size wrong: %d > %d\n",
1055 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1059 lmv->tgts_size = LMV_MAX_TGT_COUNT * sizeof(struct lmv_tgt_desc);
1061 OBD_ALLOC(lmv->tgts, lmv->tgts_size);
1062 if (lmv->tgts == NULL)
1065 for (i = 0; i < LMV_MAX_TGT_COUNT; i++) {
1066 sema_init(&lmv->tgts[i].ltd_fid_sem, 1);
1067 lmv->tgts[i].ltd_idx = i;
1070 lmv->datas_size = LMV_MAX_TGT_COUNT * sizeof(struct obd_connect_data);
1072 OBD_ALLOC(lmv->datas, lmv->datas_size);
1073 if (lmv->datas == NULL)
1074 GOTO(out_free_tgts, rc = -ENOMEM);
1076 obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1077 lmv->desc.ld_tgt_count = 0;
1078 lmv->desc.ld_active_tgt_count = 0;
1079 lmv->max_cookiesize = 0;
1080 lmv->max_def_easize = 0;
1081 lmv->max_easize = 0;
1082 lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
1084 spin_lock_init(&lmv->lmv_lock);
1085 sema_init(&lmv->init_sem, 1);
1087 rc = lmv_object_setup(obd);
1089 CERROR("Can't setup LMV object manager, error %d.\n", rc);
1090 GOTO(out_free_datas, rc);
1093 lprocfs_lmv_init_vars(&lvars);
1094 lprocfs_obd_setup(obd, lvars.obd_vars);
1097 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd_status",
1098 0444, &lmv_proc_target_fops, obd);
1100 CWARN("Error adding target_obd_stats file (%d)\n", rc);
1103 rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1104 LUSTRE_CLI_FLD_HASH_DHT);
1106 CERROR("Can't init FLD, err %d\n", rc);
1107 GOTO(out_free_datas, rc);
1113 OBD_FREE(lmv->datas, lmv->datas_size);
1116 OBD_FREE(lmv->tgts, lmv->tgts_size);
1121 static int lmv_cleanup(struct obd_device *obd)
1123 struct lmv_obd *lmv = &obd->u.lmv;
1126 fld_client_fini(&lmv->lmv_fld);
1127 lprocfs_obd_cleanup(obd);
1128 lmv_object_cleanup(obd);
1129 OBD_FREE(lmv->datas, lmv->datas_size);
1130 OBD_FREE(lmv->tgts, lmv->tgts_size);
1135 static int lmv_process_config(struct obd_device *obd, obd_count len, void *buf)
1137 struct lustre_cfg *lcfg = buf;
1138 struct obd_uuid tgt_uuid;
1142 switch(lcfg->lcfg_command) {
1144 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(tgt_uuid.uuid))
1145 GOTO(out, rc = -EINVAL);
1147 obd_str2uuid(&tgt_uuid, lustre_cfg_string(lcfg, 1));
1148 rc = lmv_add_target(obd, &tgt_uuid);
1151 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1152 GOTO(out, rc = -EINVAL);
1159 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1160 __u64 max_age, __u32 flags)
1162 struct lmv_obd *lmv = &obd->u.lmv;
1163 struct obd_statfs *temp;
1168 rc = lmv_check_connect(obd);
1172 OBD_ALLOC(temp, sizeof(*temp));
1176 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1177 if (lmv->tgts[i].ltd_exp == NULL)
1180 rc = obd_statfs(lmv->tgts[i].ltd_exp->exp_obd, temp,
1183 CERROR("can't stat MDS #%d (%s), error %d\n", i,
1184 lmv->tgts[i].ltd_exp->exp_obd->obd_name,
1186 GOTO(out_free_temp, rc);
1191 osfs->os_bavail += temp->os_bavail;
1192 osfs->os_blocks += temp->os_blocks;
1193 osfs->os_ffree += temp->os_ffree;
1194 osfs->os_files += temp->os_files;
1200 OBD_FREE(temp, sizeof(*temp));
1204 static int lmv_getstatus(struct obd_export *exp,
1206 struct obd_capa **pc)
1208 struct obd_device *obd = exp->exp_obd;
1209 struct lmv_obd *lmv = &obd->u.lmv;
1213 rc = lmv_check_connect(obd);
1217 rc = md_getstatus(lmv->tgts[0].ltd_exp, fid, pc);
1221 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1222 struct obd_capa *oc, obd_valid valid, const char *name,
1223 const char *input, int input_size, int output_size,
1224 int flags, struct ptlrpc_request **request)
1226 struct obd_device *obd = exp->exp_obd;
1227 struct lmv_obd *lmv = &obd->u.lmv;
1228 struct lmv_tgt_desc *tgt;
1232 rc = lmv_check_connect(obd);
1236 tgt = lmv_find_target(lmv, fid);
1238 RETURN(PTR_ERR(tgt));
1240 rc = md_getxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1241 input_size, output_size, flags, request);
1246 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1247 struct obd_capa *oc, obd_valid valid, const char *name,
1248 const char *input, int input_size, int output_size,
1249 int flags, __u32 suppgid,
1250 struct ptlrpc_request **request)
1252 struct obd_device *obd = exp->exp_obd;
1253 struct lmv_obd *lmv = &obd->u.lmv;
1254 struct lmv_tgt_desc *tgt;
1258 rc = lmv_check_connect(obd);
1262 tgt = lmv_find_target(lmv, fid);
1264 RETURN(PTR_ERR(tgt));
1266 rc = md_setxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1267 input_size, output_size, flags, suppgid,
1273 static int lmv_getattr(struct obd_export *exp, const struct lu_fid *fid,
1274 struct obd_capa *oc, obd_valid valid, int ea_size,
1275 struct ptlrpc_request **request)
1277 struct obd_device *obd = exp->exp_obd;
1278 struct lmv_obd *lmv = &obd->u.lmv;
1279 struct lmv_tgt_desc *tgt;
1280 struct lmv_object *obj;
1285 rc = lmv_check_connect(obd);
1289 tgt = lmv_find_target(lmv, fid);
1291 RETURN(PTR_ERR(tgt));
1293 rc = md_getattr(tgt->ltd_exp, fid, oc, valid, ea_size, request);
1297 obj = lmv_object_find_lock(obd, fid);
1299 CDEBUG(D_INODE, "GETATTR for "DFID" %s\n", PFID(fid),
1300 obj ? "(split)" : "");
1303 * If object is split, then we loop over all the slaves and gather size
1304 * attribute. In ideal world we would have to gather also mds field from
1305 * all slaves, as object is spread over the cluster and this is
1306 * definitely interesting information and it is not good to loss it,
1310 struct mdt_body *body;
1312 if (*request == NULL) {
1313 lmv_object_put(obj);
1317 body = req_capsule_server_get(&(*request)->rq_pill,
1319 LASSERT(body != NULL);
1321 for (i = 0; i < obj->lo_objcount; i++) {
1322 if (lmv->tgts[i].ltd_exp == NULL) {
1323 CWARN("%s: NULL export for %d\n",
1329 * Skip master object.
1331 if (lu_fid_eq(&obj->lo_fid, &obj->lo_stripes[i].ls_fid))
1334 body->size += obj->lo_stripes[i].ls_size;
1337 lmv_object_put_unlock(obj);
1343 static int lmv_change_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1344 ldlm_iterator_t it, void *data)
1346 struct obd_device *obd = exp->exp_obd;
1347 struct lmv_obd *lmv = &obd->u.lmv;
1352 rc = lmv_check_connect(obd);
1356 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1359 * With CMD every object can have two locks in different namespaces:
1360 * lookup lock in space of mds storing direntry and update/open lock in
1361 * space of mds storing inode.
1363 for (i = 0; i < lmv->desc.ld_tgt_count; i++)
1364 md_change_cbdata(lmv->tgts[i].ltd_exp, fid, it, data);
1369 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1370 struct md_open_data *mod, struct ptlrpc_request **request)
1372 struct obd_device *obd = exp->exp_obd;
1373 struct lmv_obd *lmv = &obd->u.lmv;
1374 struct lmv_tgt_desc *tgt;
1378 rc = lmv_check_connect(obd);
1382 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1384 RETURN(PTR_ERR(tgt));
1386 CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1387 rc = md_close(tgt->ltd_exp, op_data, mod, request);
1392 * Called in the case MDS returns -ERESTART on create on open, what means that
1393 * directory is split and its LMV presentation object has to be updated.
1395 int lmv_handle_split(struct obd_export *exp, const struct lu_fid *fid)
1397 struct obd_device *obd = exp->exp_obd;
1398 struct lmv_obd *lmv = &obd->u.lmv;
1399 struct ptlrpc_request *req = NULL;
1400 struct lmv_tgt_desc *tgt;
1401 struct lmv_object *obj;
1402 struct lustre_md md;
1409 mealen = lmv_get_easize(lmv);
1411 valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA | OBD_MD_MEA;
1413 tgt = lmv_find_target(lmv, fid);
1415 RETURN(PTR_ERR(tgt));
1418 * Time to update mea of parent fid.
1420 rc = md_getattr(tgt->ltd_exp, fid, NULL, valid, mealen, &req);
1422 CERROR("md_getattr() failed, error %d\n", rc);
1426 rc = md_get_lustre_md(tgt->ltd_exp, req, NULL, exp, &md);
1428 CERROR("md_get_lustre_md() failed, error %d\n", rc);
1433 GOTO(cleanup, rc = -ENODATA);
1435 obj = lmv_object_create(exp, fid, md.mea);
1439 lmv_object_put(obj);
1441 obd_free_memmd(exp, (void *)&md.mea);
1445 ptlrpc_req_finished(req);
1449 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1450 const void *data, int datalen, int mode, __u32 uid,
1451 __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1452 struct ptlrpc_request **request)
1454 struct obd_device *obd = exp->exp_obd;
1455 struct lmv_obd *lmv = &obd->u.lmv;
1456 struct lmv_tgt_desc *tgt;
1457 struct lmv_object *obj;
1463 rc = lmv_check_connect(obd);
1467 if (!lmv->desc.ld_active_tgt_count)
1473 obj = lmv_object_find(obd, &op_data->op_fid1);
1475 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1476 op_data->op_name, op_data->op_namelen);
1477 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1478 op_data->op_bias &= ~MDS_CHECK_SPLIT;
1479 op_data->op_mds = obj->lo_stripes[sidx].ls_mds;
1480 tgt = lmv_get_target(lmv, op_data->op_mds);
1481 lmv_object_put(obj);
1483 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1484 op_data->op_bias |= MDS_CHECK_SPLIT;
1485 op_data->op_mds = tgt->ltd_idx;
1489 RETURN(PTR_ERR(tgt));
1491 rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
1492 if (rc == -ERESTART)
1497 CDEBUG(D_INODE, "CREATE '%*s' on "DFID" -> mds #%x\n",
1498 op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1501 op_data->op_flags |= MF_MDC_CANCEL_FID1;
1502 rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1503 cap_effective, rdev, request);
1505 if (*request == NULL)
1507 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1508 } else if (rc == -ERESTART) {
1509 LASSERT(*request != NULL);
1510 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1511 "Got -ERESTART during create!\n");
1512 ptlrpc_req_finished(*request);
1516 * Directory got split. Time to update local object and repeat
1517 * the request with proper MDS.
1519 rc = lmv_handle_split(exp, &op_data->op_fid1);
1521 rc = lmv_allocate_slaves(obd, &op_data->op_fid1,
1522 op_data, &op_data->op_fid2);
1531 static int lmv_done_writing(struct obd_export *exp,
1532 struct md_op_data *op_data,
1533 struct md_open_data *mod)
1535 struct obd_device *obd = exp->exp_obd;
1536 struct lmv_obd *lmv = &obd->u.lmv;
1537 struct lmv_tgt_desc *tgt;
1541 rc = lmv_check_connect(obd);
1545 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1547 RETURN(PTR_ERR(tgt));
1549 rc = md_done_writing(tgt->ltd_exp, op_data, mod);
1554 lmv_enqueue_slaves(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1555 struct lookup_intent *it, struct md_op_data *op_data,
1556 struct lustre_handle *lockh, void *lmm, int lmmsize)
1558 struct obd_device *obd = exp->exp_obd;
1559 struct lmv_obd *lmv = &obd->u.lmv;
1560 struct lmv_stripe_md *mea = op_data->op_mea1;
1561 struct md_op_data *op_data2;
1562 struct lmv_tgt_desc *tgt;
1567 OBD_ALLOC_PTR(op_data2);
1568 if (op_data2 == NULL)
1571 LASSERT(mea != NULL);
1572 for (i = 0; i < mea->mea_count; i++) {
1573 memset(op_data2, 0, sizeof(*op_data2));
1574 op_data2->op_fid1 = mea->mea_ids[i];
1575 op_data2->op_bias = 0;
1577 tgt = lmv_find_target(lmv, &op_data2->op_fid1);
1579 GOTO(cleanup, rc = PTR_ERR(tgt));
1581 if (tgt->ltd_exp == NULL)
1584 rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data2,
1585 lockh + i, lmm, lmmsize, NULL, 0);
1587 CDEBUG(D_INODE, "Take lock on slave "DFID" -> %d/%d\n",
1588 PFID(&mea->mea_ids[i]), rc, it->d.lustre.it_status);
1593 if (it->d.lustre.it_data) {
1594 struct ptlrpc_request *req;
1595 req = (struct ptlrpc_request *)it->d.lustre.it_data;
1596 ptlrpc_req_finished(req);
1599 if (it->d.lustre.it_status)
1600 GOTO(cleanup, rc = it->d.lustre.it_status);
1605 OBD_FREE_PTR(op_data2);
1609 * Drop all taken locks.
1612 if (lockh[i].cookie)
1613 ldlm_lock_decref(lockh + i, einfo->ei_mode);
1614 lockh[i].cookie = 0;
1621 lmv_enqueue_remote(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1622 struct lookup_intent *it, struct md_op_data *op_data,
1623 struct lustre_handle *lockh, void *lmm, int lmmsize,
1624 int extra_lock_flags)
1626 struct ptlrpc_request *req = it->d.lustre.it_data;
1627 struct obd_device *obd = exp->exp_obd;
1628 struct lmv_obd *lmv = &obd->u.lmv;
1629 struct lustre_handle plock;
1630 struct lmv_tgt_desc *tgt;
1631 struct md_op_data *rdata;
1633 struct mdt_body *body;
1638 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1639 LASSERT(body != NULL);
1641 if (!(body->valid & OBD_MD_MDS))
1644 CDEBUG(D_INODE, "REMOTE_ENQUEUE '%s' on "DFID" -> "DFID"\n",
1645 LL_IT2STR(it), PFID(&op_data->op_fid1), PFID(&body->fid1));
1648 * We got LOOKUP lock, but we really need attrs.
1650 pmode = it->d.lustre.it_lock_mode;
1651 LASSERT(pmode != 0);
1652 memcpy(&plock, lockh, sizeof(plock));
1653 it->d.lustre.it_lock_mode = 0;
1654 it->d.lustre.it_data = NULL;
1657 it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
1658 ptlrpc_req_finished(req);
1660 tgt = lmv_find_target(lmv, &fid1);
1662 GOTO(out, rc = PTR_ERR(tgt));
1664 OBD_ALLOC_PTR(rdata);
1666 GOTO(out, rc = -ENOMEM);
1668 rdata->op_fid1 = fid1;
1669 rdata->op_bias = MDS_CROSS_REF;
1671 rc = md_enqueue(tgt->ltd_exp, einfo, it, rdata, lockh,
1672 lmm, lmmsize, NULL, extra_lock_flags);
1673 OBD_FREE_PTR(rdata);
1676 ldlm_lock_decref(&plock, pmode);
1681 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1682 struct lookup_intent *it, struct md_op_data *op_data,
1683 struct lustre_handle *lockh, void *lmm, int lmmsize,
1684 struct ptlrpc_request **req, int extra_lock_flags)
1686 struct obd_device *obd = exp->exp_obd;
1687 struct lmv_obd *lmv = &obd->u.lmv;
1688 struct lmv_tgt_desc *tgt;
1689 struct lmv_object *obj;
1694 rc = lmv_check_connect(obd);
1698 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
1699 LL_IT2STR(it), PFID(&op_data->op_fid1));
1701 if (op_data->op_mea1 && it && it->it_op == IT_UNLINK) {
1702 rc = lmv_enqueue_slaves(exp, einfo, it, op_data,
1703 lockh, lmm, lmmsize);
1707 obj = lmv_object_find(obd, &op_data->op_fid1);
1708 if (obj && op_data->op_namelen) {
1709 sidx = raw_name2idx(obj->lo_hashtype,
1711 (char *)op_data->op_name,
1712 op_data->op_namelen);
1713 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1714 tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
1716 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1719 lmv_object_put(obj);
1722 RETURN(PTR_ERR(tgt));
1724 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%d\n",
1725 LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
1727 rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data, lockh,
1728 lmm, lmmsize, req, extra_lock_flags);
1730 if (rc == 0 && it && it->it_op == IT_OPEN) {
1731 rc = lmv_enqueue_remote(exp, einfo, it, op_data, lockh,
1732 lmm, lmmsize, extra_lock_flags);
1738 lmv_getattr_name(struct obd_export *exp, const struct lu_fid *fid,
1739 struct obd_capa *oc, const char *name, int namelen,
1740 obd_valid valid, int ea_size, __u32 suppgid,
1741 struct ptlrpc_request **request)
1743 struct ptlrpc_request *req = NULL;
1744 struct obd_device *obd = exp->exp_obd;
1745 struct lmv_obd *lmv = &obd->u.lmv;
1746 struct lu_fid rid = *fid;
1747 struct lmv_tgt_desc *tgt;
1748 struct mdt_body *body;
1749 struct lmv_object *obj;
1755 rc = lmv_check_connect(obd);
1762 obj = lmv_object_find(obd, &rid);
1764 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1766 rid = obj->lo_stripes[sidx].ls_fid;
1767 tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
1768 valid &= ~OBD_MD_FLCKSPLIT;
1769 lmv_object_put(obj);
1771 tgt = lmv_find_target(lmv, &rid);
1772 valid |= OBD_MD_FLCKSPLIT;
1775 RETURN(PTR_ERR(tgt));
1777 CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" - "DFID" -> mds #%d\n",
1778 namelen, name, PFID(fid), PFID(&rid), tgt->ltd_idx);
1780 rc = md_getattr_name(tgt->ltd_exp, &rid, oc, name, namelen, valid,
1781 ea_size, suppgid, request);
1783 body = req_capsule_server_get(&(*request)->rq_pill,
1785 LASSERT(body != NULL);
1787 if (body->valid & OBD_MD_MDS) {
1789 CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1792 tgt = lmv_find_target(lmv, &rid);
1794 ptlrpc_req_finished(*request);
1795 RETURN(PTR_ERR(tgt));
1798 rc = md_getattr_name(tgt->ltd_exp, &rid, NULL, NULL,
1799 1, valid | OBD_MD_FLCROSSREF,
1800 ea_size, suppgid, &req);
1801 ptlrpc_req_finished(*request);
1804 } else if (rc == -ERESTART) {
1805 LASSERT(*request != NULL);
1806 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1807 "Got -ERESTART during getattr!\n");
1808 ptlrpc_req_finished(*request);
1812 * Directory got split. Time to update local object and repeat
1813 * the request with proper MDS.
1815 rc = lmv_handle_split(exp, &rid);
1822 #define md_op_data_fid(op_data, fl) \
1823 (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1824 fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1825 fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1826 fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1829 static int lmv_early_cancel_slaves(struct obd_export *exp,
1830 struct md_op_data *op_data, int op_tgt,
1831 ldlm_mode_t mode, int bits, int flag)
1833 struct obd_device *obd = exp->exp_obd;
1834 struct lmv_obd *lmv = &obd->u.lmv;
1835 ldlm_policy_data_t policy = {{0}};
1836 struct lu_fid *op_fid;
1837 struct lu_fid *st_fid;
1838 struct lmv_tgt_desc *tgt;
1839 struct lmv_object *obj;
1844 op_fid = md_op_data_fid(op_data, flag);
1845 if (!fid_is_sane(op_fid))
1848 obj = lmv_object_find(obd, op_fid);
1852 policy.l_inodebits.bits = bits;
1853 for (i = 0; i < obj->lo_objcount; i++) {
1854 tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
1855 st_fid = &obj->lo_stripes[i].ls_fid;
1856 if (op_tgt != tgt->ltd_idx) {
1857 CDEBUG(D_INODE, "EARLY_CANCEL slave "DFID" -> mds #%d\n",
1858 PFID(st_fid), tgt->ltd_idx);
1859 rc = md_cancel_unused(tgt->ltd_exp, st_fid, &policy,
1860 mode, LDLM_FL_ASYNC, NULL);
1862 GOTO(out_put_obj, rc);
1865 "EARLY_CANCEL skip operation target %d on "DFID"\n",
1866 op_tgt, PFID(st_fid));
1868 * Do not cancel locks for operation target, they will
1869 * be handled later in underlaying layer when calling
1870 * function we run on behalf of.
1873 op_data->op_flags |= flag;
1878 lmv_object_put(obj);
1882 static int lmv_early_cancel(struct obd_export *exp, struct md_op_data *op_data,
1883 int op_tgt, ldlm_mode_t mode, int bits, int flag)
1885 struct lu_fid *fid = md_op_data_fid(op_data, flag);
1886 struct obd_device *obd = exp->exp_obd;
1887 struct lmv_obd *lmv = &obd->u.lmv;
1888 struct lmv_tgt_desc *tgt;
1889 ldlm_policy_data_t policy = {{0}};
1890 struct lmv_object *obj;
1894 if (!fid_is_sane(fid))
1897 obj = lmv_object_find(obd, fid);
1899 rc = lmv_early_cancel_slaves(exp, op_data, op_tgt, mode,
1901 lmv_object_put(obj);
1903 tgt = lmv_find_target(lmv, fid);
1905 RETURN(PTR_ERR(tgt));
1907 if (tgt->ltd_idx != op_tgt) {
1908 CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1909 policy.l_inodebits.bits = bits;
1910 rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1911 mode, LDLM_FL_ASYNC, NULL);
1914 "EARLY_CANCEL skip operation target %d on "DFID"\n",
1916 op_data->op_flags |= flag;
1925 * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1928 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1929 struct ptlrpc_request **request)
1931 struct obd_device *obd = exp->exp_obd;
1932 struct lmv_obd *lmv = &obd->u.lmv;
1933 struct lmv_tgt_desc *tgt;
1934 struct lmv_object *obj;
1941 rc = lmv_check_connect(obd);
1948 LASSERT(op_data->op_namelen != 0);
1950 CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
1951 PFID(&op_data->op_fid2), op_data->op_namelen,
1952 op_data->op_name, PFID(&op_data->op_fid1));
1954 obj = lmv_object_find(obd, &op_data->op_fid2);
1956 sidx = raw_name2idx(obj->lo_hashtype,
1959 op_data->op_namelen);
1960 op_data->op_fid2 = obj->lo_stripes[sidx].ls_fid;
1961 mds = obj->lo_stripes[sidx].ls_mds;
1962 lmv_object_put(obj);
1964 rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds);
1969 CDEBUG(D_INODE, "Forward to mds #%x ("DFID")\n",
1970 mds, PFID(&op_data->op_fid1));
1972 op_data->op_fsuid = current->fsuid;
1973 op_data->op_fsgid = current->fsgid;
1974 op_data->op_cap = cfs_curproc_cap_pack();
1975 tgt = lmv_get_target(lmv, mds);
1978 * Cancel UPDATE lock on child (fid1).
1980 op_data->op_flags |= MF_MDC_CANCEL_FID2;
1981 rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
1982 MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
1984 rc = md_link(tgt->ltd_exp, op_data, request);
1985 if (rc == -ERESTART) {
1986 LASSERT(*request != NULL);
1987 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1988 "Got -ERESTART during link!\n");
1989 ptlrpc_req_finished(*request);
1993 * Directory got split. Time to update local object and repeat
1994 * the request with proper MDS.
1996 rc = lmv_handle_split(exp, &op_data->op_fid2);
2004 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
2005 const char *old, int oldlen, const char *new, int newlen,
2006 struct ptlrpc_request **request)
2008 struct obd_device *obd = exp->exp_obd;
2009 struct lmv_obd *lmv = &obd->u.lmv;
2010 struct lmv_tgt_desc *src_tgt;
2011 struct lmv_tgt_desc *tgt_tgt;
2015 struct lmv_object *obj;
2020 LASSERT(oldlen != 0);
2022 CDEBUG(D_INODE, "RENAME %*s in "DFID" to %*s in "DFID"\n",
2023 oldlen, old, PFID(&op_data->op_fid1),
2024 newlen, new, PFID(&op_data->op_fid2));
2026 rc = lmv_check_connect(obd);
2033 obj = lmv_object_find(obd, &op_data->op_fid1);
2035 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
2036 (char *)old, oldlen);
2037 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2038 mds1 = obj->lo_stripes[sidx].ls_mds;
2039 CDEBUG(D_INODE, "Parent obj "DFID"\n", PFID(&op_data->op_fid1));
2040 lmv_object_put(obj);
2042 rc = lmv_fld_lookup(lmv, &op_data->op_fid1, &mds1);
2047 obj = lmv_object_find(obd, &op_data->op_fid2);
2050 * Directory is already split, so we have to forward request to
2053 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
2054 (char *)new, newlen);
2056 mds2 = obj->lo_stripes[sidx].ls_mds;
2057 op_data->op_fid2 = obj->lo_stripes[sidx].ls_fid;
2058 CDEBUG(D_INODE, "Parent obj "DFID"\n", PFID(&op_data->op_fid2));
2059 lmv_object_put(obj);
2061 rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds2);
2066 op_data->op_fsuid = current->fsuid;
2067 op_data->op_fsgid = current->fsgid;
2068 op_data->op_cap = cfs_curproc_cap_pack();
2070 src_tgt = lmv_get_target(lmv, mds1);
2071 tgt_tgt = lmv_get_target(lmv, mds2);
2074 * LOOKUP lock on src child (fid3) should also be cancelled for
2075 * src_tgt in mdc_rename.
2077 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2080 * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
2083 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2084 LCK_EX, MDS_INODELOCK_UPDATE,
2085 MF_MDC_CANCEL_FID2);
2088 * Cancel LOOKUP locks on tgt child (fid4) for parent tgt_tgt.
2091 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2092 LCK_EX, MDS_INODELOCK_LOOKUP,
2093 MF_MDC_CANCEL_FID4);
2097 * Cancel all the locks on tgt child (fid4).
2100 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2101 LCK_EX, MDS_INODELOCK_FULL,
2102 MF_MDC_CANCEL_FID4);
2105 rc = md_rename(src_tgt->ltd_exp, op_data, old, oldlen,
2106 new, newlen, request);
2108 if (rc == -ERESTART) {
2109 LASSERT(*request != NULL);
2110 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2111 "Got -ERESTART during rename!\n");
2112 ptlrpc_req_finished(*request);
2116 * Directory got split. Time to update local object and repeat
2117 * the request with proper MDS.
2119 rc = lmv_handle_split(exp, &op_data->op_fid1);
2126 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2127 void *ea, int ealen, void *ea2, int ea2len,
2128 struct ptlrpc_request **request,
2129 struct md_open_data **mod)
2131 struct obd_device *obd = exp->exp_obd;
2132 struct lmv_obd *lmv = &obd->u.lmv;
2133 struct ptlrpc_request *req;
2134 struct lmv_tgt_desc *tgt;
2135 struct lmv_object *obj;
2140 rc = lmv_check_connect(obd);
2144 obj = lmv_object_find(obd, &op_data->op_fid1);
2146 CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x%s\n",
2147 PFID(&op_data->op_fid1), op_data->op_attr.ia_valid,
2148 obj ? ", split" : "");
2150 op_data->op_flags |= MF_MDC_CANCEL_FID1;
2152 for (i = 0; i < obj->lo_objcount; i++) {
2153 op_data->op_fid1 = obj->lo_stripes[i].ls_fid;
2155 tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
2161 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen,
2162 ea2, ea2len, &req, mod);
2164 if (lu_fid_eq(&obj->lo_fid, &obj->lo_stripes[i].ls_fid)) {
2166 * This is master object and this request should
2167 * be returned back to llite.
2171 ptlrpc_req_finished(req);
2177 lmv_object_put(obj);
2179 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2181 RETURN(PTR_ERR(tgt));
2183 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, ea2,
2184 ea2len, request, mod);
2189 static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
2190 struct obd_capa *oc, struct ptlrpc_request **request)
2192 struct obd_device *obd = exp->exp_obd;
2193 struct lmv_obd *lmv = &obd->u.lmv;
2194 struct lmv_tgt_desc *tgt;
2198 rc = lmv_check_connect(obd);
2202 tgt = lmv_find_target(lmv, fid);
2204 RETURN(PTR_ERR(tgt));
2206 rc = md_sync(tgt->ltd_exp, fid, oc, request);
2211 * Main purpose of LMV blocking ast is to remove split directory LMV
2212 * presentation object (struct lmv_object) attached to the lock being revoked.
2214 int lmv_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
2215 void *data, int flag)
2217 struct lustre_handle lockh;
2218 struct lmv_object *obj;
2223 case LDLM_CB_BLOCKING:
2224 ldlm_lock2handle(lock, &lockh);
2225 rc = ldlm_cli_cancel(&lockh);
2227 CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
2231 case LDLM_CB_CANCELING:
2233 * Time to drop cached attrs for split directory object
2235 obj = lock->l_ast_data;
2237 CDEBUG(D_INODE, "Cancel %s on "LPU64"/"LPU64
2238 ", master "DFID"\n",
2239 lock->l_resource->lr_name.name[3] == 1 ?
2240 "LOOKUP" : "UPDATE",
2241 lock->l_resource->lr_name.name[0],
2242 lock->l_resource->lr_name.name[1],
2243 PFID(&obj->lo_fid));
2244 lmv_object_put(obj);
2253 static void lmv_hash_adjust(__u64 *hash, __u64 hash_adj)
2257 val = le64_to_cpu(*hash);
2259 val += MAX_HASH_SIZE;
2260 if (val != DIR_END_OFF)
2261 *hash = cpu_to_le64(val - hash_adj);
2264 static __u32 lmv_node_rank(struct obd_export *exp, const struct lu_fid *fid)
2267 struct obd_import *imp;
2270 * XXX: to get nid we assume that underlying obd device is mdc.
2272 imp = class_exp2cliimp(exp);
2273 id = imp->imp_connection->c_self + fid_flatten(fid);
2275 CDEBUG(D_INODE, "Readpage node rank: "LPX64" "DFID" "LPX64" "LPX64"\n",
2276 imp->imp_connection->c_self, PFID(fid), id, id ^ (id >> 32));
2278 return id ^ (id >> 32);
2281 static int lmv_readpage(struct obd_export *exp, const struct lu_fid *fid,
2282 struct obd_capa *oc, __u64 offset64, struct page *page,
2283 struct ptlrpc_request **request)
2285 struct obd_device *obd = exp->exp_obd;
2286 struct lmv_obd *lmv = &obd->u.lmv;
2287 struct lu_fid rid = *fid;
2288 struct lmv_object *obj;
2298 struct lmv_stripe *los;
2299 struct lmv_tgt_desc *tgt;
2300 struct lu_dirpage *dp;
2301 struct lu_dirent *ent;
2306 rc = lmv_check_connect(obd);
2310 CDEBUG(D_INODE, "READPAGE at "LPX64" from "DFID"\n", offset, PFID(&rid));
2313 * This case handle directory lookup in clustered metadata case (i.e.
2314 * split directory is located on multiple md servers.)
2315 * each server keeps directory entries for certain range of hashes.
2316 * E.g. we have N server and suppose hash range is 0 to MAX_HASH.
2317 * first server will keep records with hashes [ 0 ... MAX_HASH / N - 1],
2318 * second one with hashes [MAX_HASH / N ... 2 * MAX_HASH / N] and
2320 * readdir can simply start reading entries from 0 - N server in
2321 * order but that will not scale well as all client will request dir in
2322 * to server in same order.
2323 * Following algorithm does optimization:
2324 * Instead of doing readdir in 1, 2, ...., N order, client with a
2325 * rank R does readdir in R, R + 1, ..., N, 1, ... R - 1 order.
2326 * (every client has rank R)
2327 * But ll_readdir() expect offset range [0 to MAX_HASH/N) but
2328 * since client ask dir from MDS{R} client has pages with offsets
2329 * [R*MAX_HASH/N ... (R + 1)*MAX_HASH/N] there for we do hash_adj
2330 * on hash values that we get.
2332 obj = lmv_object_find_lock(obd, fid);
2334 nr = obj->lo_objcount;
2336 seg_size = MAX_HASH_SIZE;
2337 do_div(seg_size, nr);
2338 los = obj->lo_stripes;
2339 tgt = lmv_get_target(lmv, los[0].ls_mds);
2340 rank = lmv_node_rank(tgt->ltd_exp, fid) % nr;
2342 do_div(tgt_tmp, seg_size);
2343 tgt0_idx = do_div(tgt_tmp, nr);
2344 tgt_idx = (tgt0_idx + rank) % nr;
2346 if (tgt_idx < tgt0_idx)
2350 * Last segment has unusual length due to division
2353 hash_adj = MAX_HASH_SIZE - seg_size * nr;
2357 hash_adj += rank * seg_size;
2359 CDEBUG(D_INODE, "Readpage hash adjustment: %x "LPX64" "
2360 LPX64"/%x -> "LPX64"/%x\n", rank, hash_adj,
2361 offset, tgt0_idx, offset + hash_adj, tgt_idx);
2363 offset = (offset + hash_adj) & MAX_HASH_SIZE;
2364 rid = obj->lo_stripes[tgt_idx].ls_fid;
2365 tgt = lmv_get_target(lmv, los[tgt_idx].ls_mds);
2367 CDEBUG(D_INODE, "Forward to "DFID" with offset %lu i %d\n",
2368 PFID(&rid), (unsigned long)offset, tgt_idx);
2370 tgt = lmv_find_target(lmv, &rid);
2373 GOTO(cleanup, rc = PTR_ERR(tgt));
2375 rc = md_readpage(tgt->ltd_exp, &rid, oc, offset, page, request);
2379 dp = cfs_kmap(page);
2381 lmv_hash_adjust(&dp->ldp_hash_start, hash_adj);
2382 lmv_hash_adjust(&dp->ldp_hash_end, hash_adj);
2383 LASSERT(le64_to_cpu(dp->ldp_hash_start) <= offset64);
2385 for (ent = lu_dirent_start(dp); ent != NULL;
2386 ent = lu_dirent_next(ent))
2387 lmv_hash_adjust(&ent->lde_hash, hash_adj);
2389 if (tgt0_idx != nr - 1) {
2392 end = le64_to_cpu(dp->ldp_hash_end);
2393 if (end == DIR_END_OFF) {
2394 dp->ldp_hash_end = cpu_to_le32(seg_size *
2397 ""DFID" reset end "LPX64" tgt %d\n",
2399 le64_to_cpu(dp->ldp_hash_end), tgt_idx);
2407 lmv_object_put_unlock(obj);
2411 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2412 struct ptlrpc_request **request)
2414 struct obd_device *obd = exp->exp_obd;
2415 struct lmv_obd *lmv = &obd->u.lmv;
2416 struct lmv_tgt_desc *tgt = NULL;
2417 struct lmv_object *obj;
2423 rc = lmv_check_connect(obd);
2430 LASSERT(op_data->op_namelen != 0);
2432 obj = lmv_object_find(obd, &op_data->op_fid1);
2434 sidx = raw_name2idx(obj->lo_hashtype,
2437 op_data->op_namelen);
2438 op_data->op_bias &= ~MDS_CHECK_SPLIT;
2439 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2440 tgt = lmv_get_target(lmv,
2441 obj->lo_stripes[sidx].ls_mds);
2442 lmv_object_put(obj);
2443 CDEBUG(D_INODE, "UNLINK '%*s' in "DFID" -> %u\n",
2444 op_data->op_namelen, op_data->op_name,
2445 PFID(&op_data->op_fid1), sidx);
2449 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2451 RETURN(PTR_ERR(tgt));
2452 op_data->op_bias |= MDS_CHECK_SPLIT;
2455 op_data->op_fsuid = current->fsuid;
2456 op_data->op_fsgid = current->fsgid;
2457 op_data->op_cap = cfs_curproc_cap_pack();
2460 * If child's fid is given, cancel unused locks for it if it is from
2461 * another export than parent.
2463 * LOOKUP lock for child (fid3) should also be cancelled on parent
2464 * tgt_tgt in mdc_unlink().
2466 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2469 * Cancel FULL locks on child (fid3).
2471 rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2472 MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2475 rc = md_unlink(tgt->ltd_exp, op_data, request);
2477 if (rc == -ERESTART) {
2478 LASSERT(*request != NULL);
2479 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2480 "Got -ERESTART during unlink!\n");
2481 ptlrpc_req_finished(*request);
2485 * Directory got split. Time to update local object and repeat
2486 * the request with proper MDS.
2488 rc = lmv_handle_split(exp, &op_data->op_fid1);
2495 static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2500 case OBD_CLEANUP_EARLY:
2501 /* XXX: here should be calling obd_precleanup() down to
2504 case OBD_CLEANUP_EXPORTS:
2505 rc = obd_llog_finish(obd, 0);
2507 CERROR("failed to cleanup llogging subsystems\n");
2515 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
2516 void *key, __u32 *vallen, void *val,
2517 struct lov_stripe_md *lsm)
2519 struct obd_device *obd;
2520 struct lmv_obd *lmv;
2524 obd = class_exp2obd(exp);
2526 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2527 exp->exp_handle.h_cookie);
2532 if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2533 struct lmv_tgt_desc *tgts;
2536 rc = lmv_check_connect(obd);
2540 LASSERT(*vallen == sizeof(__u32));
2541 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count;
2545 * All tgts should be connected when this gets called.
2547 if (!tgts || !tgts->ltd_exp) {
2548 CERROR("target not setup?\n");
2552 if (!obd_get_info(tgts->ltd_exp, keylen, key,
2557 } else if (KEY_IS(KEY_MAX_EASIZE) || KEY_IS(KEY_CONN_DATA)) {
2558 rc = lmv_check_connect(obd);
2563 * Forwarding this request to first MDS, it should know LOV
2566 rc = obd_get_info(lmv->tgts[0].ltd_exp, keylen, key,
2568 if (!rc && KEY_IS(KEY_CONN_DATA)) {
2569 exp->exp_connect_flags =
2570 ((struct obd_connect_data *)val)->ocd_connect_flags;
2575 CDEBUG(D_IOCTL, "Invalid key\n");
2579 int lmv_set_info_async(struct obd_export *exp, obd_count keylen,
2580 void *key, obd_count vallen, void *val,
2581 struct ptlrpc_request_set *set)
2583 struct lmv_tgt_desc *tgt;
2584 struct obd_device *obd;
2585 struct lmv_obd *lmv;
2589 obd = class_exp2obd(exp);
2591 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2592 exp->exp_handle.h_cookie);
2597 if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX) ||
2598 KEY_IS(KEY_INIT_RECOV_BACKUP)) {
2601 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2602 tgt = &lmv->tgts[i];
2607 err = obd_set_info_async(tgt->ltd_exp,
2608 keylen, key, vallen, val, set);
2619 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
2620 struct lov_stripe_md *lsm)
2622 struct obd_device *obd = class_exp2obd(exp);
2623 struct lmv_obd *lmv = &obd->u.lmv;
2624 struct lmv_stripe_md *meap;
2625 struct lmv_stripe_md *lsmp;
2630 mea_size = lmv_get_easize(lmv);
2634 if (*lmmp && !lsm) {
2635 OBD_FREE(*lmmp, mea_size);
2640 if (*lmmp == NULL) {
2641 OBD_ALLOC(*lmmp, mea_size);
2649 lsmp = (struct lmv_stripe_md *)lsm;
2650 meap = (struct lmv_stripe_md *)*lmmp;
2652 if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
2653 lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
2656 meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
2657 meap->mea_count = cpu_to_le32(lsmp->mea_count);
2658 meap->mea_master = cpu_to_le32(lsmp->mea_master);
2660 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2661 meap->mea_ids[i] = meap->mea_ids[i];
2662 fid_cpu_to_le(&meap->mea_ids[i], &meap->mea_ids[i]);
2668 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
2669 struct lov_mds_md *lmm, int lmm_size)
2671 struct obd_device *obd = class_exp2obd(exp);
2672 struct lmv_stripe_md **tmea = (struct lmv_stripe_md **)lsmp;
2673 struct lmv_stripe_md *mea = (struct lmv_stripe_md *)lmm;
2674 struct lmv_obd *lmv = &obd->u.lmv;
2680 mea_size = lmv_get_easize(lmv);
2684 if (*lsmp != NULL && lmm == NULL) {
2685 OBD_FREE(*tmea, mea_size);
2690 LASSERT(mea_size == lmm_size);
2692 OBD_ALLOC(*tmea, mea_size);
2699 if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
2700 mea->mea_magic == MEA_MAGIC_ALL_CHARS ||
2701 mea->mea_magic == MEA_MAGIC_HASH_SEGMENT)
2703 magic = le32_to_cpu(mea->mea_magic);
2706 * Old mea is not handled here.
2708 CERROR("Old not supportable EA is found\n");
2712 (*tmea)->mea_magic = magic;
2713 (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
2714 (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
2716 for (i = 0; i < (*tmea)->mea_count; i++) {
2717 (*tmea)->mea_ids[i] = mea->mea_ids[i];
2718 fid_le_to_cpu(&(*tmea)->mea_ids[i], &(*tmea)->mea_ids[i]);
2723 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
2724 ldlm_policy_data_t *policy, ldlm_mode_t mode,
2725 int flags, void *opaque)
2727 struct obd_device *obd = exp->exp_obd;
2728 struct lmv_obd *lmv = &obd->u.lmv;
2734 LASSERT(fid != NULL);
2736 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2737 if (!lmv->tgts[i].ltd_exp || !lmv->tgts[i].ltd_active)
2740 err = md_cancel_unused(lmv->tgts[i].ltd_exp, fid,
2741 policy, mode, flags, opaque);
2748 int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
2751 struct obd_device *obd = exp->exp_obd;
2752 struct lmv_obd *lmv = &obd->u.lmv;
2756 rc = md_set_lock_data(lmv->tgts[0].ltd_exp, lockh, data, bits);
2760 ldlm_mode_t lmv_lock_match(struct obd_export *exp, int flags,
2761 const struct lu_fid *fid, ldlm_type_t type,
2762 ldlm_policy_data_t *policy, ldlm_mode_t mode,
2763 struct lustre_handle *lockh)
2765 struct obd_device *obd = exp->exp_obd;
2766 struct lmv_obd *lmv = &obd->u.lmv;
2771 CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
2774 * With CMD every object can have two locks in different namespaces:
2775 * lookup lock in space of mds storing direntry and update/open lock in
2776 * space of mds storing inode. Thus we check all targets, not only that
2777 * one fid was created in.
2779 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2780 rc = md_lock_match(lmv->tgts[i].ltd_exp, flags, fid,
2781 type, policy, mode, lockh);
2789 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
2790 struct obd_export *dt_exp, struct obd_export *md_exp,
2791 struct lustre_md *md)
2793 struct obd_device *obd = exp->exp_obd;
2794 struct lmv_obd *lmv = &obd->u.lmv;
2797 rc = md_get_lustre_md(lmv->tgts[0].ltd_exp, req, dt_exp, md_exp, md);
2801 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
2803 struct obd_device *obd = exp->exp_obd;
2804 struct lmv_obd *lmv = &obd->u.lmv;
2808 obd_free_memmd(exp, (void *)&md->mea);
2809 RETURN(md_free_lustre_md(lmv->tgts[0].ltd_exp, md));
2812 int lmv_set_open_replay_data(struct obd_export *exp,
2813 struct obd_client_handle *och,
2814 struct ptlrpc_request *open_req)
2816 struct obd_device *obd = exp->exp_obd;
2817 struct lmv_obd *lmv = &obd->u.lmv;
2818 struct lmv_tgt_desc *tgt;
2821 tgt = lmv_find_target(lmv, &och->och_fid);
2823 RETURN(PTR_ERR(tgt));
2825 RETURN(md_set_open_replay_data(tgt->ltd_exp, och, open_req));
2828 int lmv_clear_open_replay_data(struct obd_export *exp,
2829 struct obd_client_handle *och)
2831 struct obd_device *obd = exp->exp_obd;
2832 struct lmv_obd *lmv = &obd->u.lmv;
2833 struct lmv_tgt_desc *tgt;
2836 tgt = lmv_find_target(lmv, &och->och_fid);
2838 RETURN(PTR_ERR(tgt));
2840 RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
2843 static int lmv_get_remote_perm(struct obd_export *exp,
2844 const struct lu_fid *fid,
2845 struct obd_capa *oc, __u32 suppgid,
2846 struct ptlrpc_request **request)
2848 struct obd_device *obd = exp->exp_obd;
2849 struct lmv_obd *lmv = &obd->u.lmv;
2850 struct lmv_tgt_desc *tgt;
2854 rc = lmv_check_connect(obd);
2858 tgt = lmv_find_target(lmv, fid);
2860 RETURN(PTR_ERR(tgt));
2862 rc = md_get_remote_perm(tgt->ltd_exp, fid, oc, suppgid, request);
2866 static int lmv_renew_capa(struct obd_export *exp, struct obd_capa *oc,
2869 struct obd_device *obd = exp->exp_obd;
2870 struct lmv_obd *lmv = &obd->u.lmv;
2871 struct lmv_tgt_desc *tgt;
2875 rc = lmv_check_connect(obd);
2879 tgt = lmv_find_target(lmv, &oc->c_capa.lc_fid);
2881 RETURN(PTR_ERR(tgt));
2883 rc = md_renew_capa(tgt->ltd_exp, oc, cb);
2887 int lmv_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
2888 const struct req_msg_field *field, struct obd_capa **oc)
2890 struct obd_device *obd = exp->exp_obd;
2891 struct lmv_obd *lmv = &obd->u.lmv;
2895 rc = md_unpack_capa(lmv->tgts[0].ltd_exp, req, field, oc);
2899 int lmv_intent_getattr_async(struct obd_export *exp,
2900 struct md_enqueue_info *minfo,
2901 struct ldlm_enqueue_info *einfo)
2903 struct md_op_data *op_data = &minfo->mi_data;
2904 struct obd_device *obd = exp->exp_obd;
2905 struct lmv_obd *lmv = &obd->u.lmv;
2906 struct lmv_object *obj;
2907 struct lmv_tgt_desc *tgt;
2912 rc = lmv_check_connect(obd);
2916 if (!fid_is_sane(&op_data->op_fid2)) {
2917 obj = lmv_object_find(obd, &op_data->op_fid1);
2918 if (obj && op_data->op_namelen) {
2919 sidx = raw_name2idx(obj->lo_hashtype,
2921 (char *)op_data->op_name,
2922 op_data->op_namelen);
2923 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2924 tgt = lmv_get_target(lmv,
2925 obj->lo_stripes[sidx].ls_mds);
2927 "Choose slave dir ("DFID") -> mds #%d\n",
2928 PFID(&op_data->op_fid1), tgt->ltd_idx);
2930 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2933 lmv_object_put(obj);
2935 op_data->op_fid1 = op_data->op_fid2;
2936 tgt = lmv_find_target(lmv, &op_data->op_fid2);
2937 op_data->op_bias = MDS_CROSS_REF;
2939 * Unfortunately, we have to lie to MDC/MDS to retrieve
2940 * attributes llite needs.
2942 if (minfo->mi_it.it_op & IT_LOOKUP)
2943 minfo->mi_it.it_op = IT_GETATTR;
2947 RETURN(PTR_ERR(tgt));
2949 rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
2953 int lmv_revalidate_lock(struct obd_export *exp,
2954 struct lookup_intent *it,
2957 struct obd_device *obd = exp->exp_obd;
2958 struct lmv_obd *lmv = &obd->u.lmv;
2959 struct lmv_tgt_desc *tgt;
2963 rc = lmv_check_connect(obd);
2967 tgt = lmv_find_target(lmv, fid);
2969 RETURN(PTR_ERR(tgt));
2971 rc = md_revalidate_lock(tgt->ltd_exp, it, fid);
2976 struct obd_ops lmv_obd_ops = {
2977 .o_owner = THIS_MODULE,
2978 .o_setup = lmv_setup,
2979 .o_cleanup = lmv_cleanup,
2980 .o_precleanup = lmv_precleanup,
2981 .o_process_config = lmv_process_config,
2982 .o_connect = lmv_connect,
2983 .o_disconnect = lmv_disconnect,
2984 .o_statfs = lmv_statfs,
2985 .o_get_info = lmv_get_info,
2986 .o_set_info_async = lmv_set_info_async,
2987 .o_packmd = lmv_packmd,
2988 .o_unpackmd = lmv_unpackmd,
2989 .o_notify = lmv_notify,
2990 .o_get_uuid = lmv_get_uuid,
2991 .o_iocontrol = lmv_iocontrol,
2992 .o_fid_delete = lmv_fid_delete
2995 struct md_ops lmv_md_ops = {
2996 .m_getstatus = lmv_getstatus,
2997 .m_change_cbdata = lmv_change_cbdata,
2998 .m_close = lmv_close,
2999 .m_create = lmv_create,
3000 .m_done_writing = lmv_done_writing,
3001 .m_enqueue = lmv_enqueue,
3002 .m_getattr = lmv_getattr,
3003 .m_getxattr = lmv_getxattr,
3004 .m_getattr_name = lmv_getattr_name,
3005 .m_intent_lock = lmv_intent_lock,
3007 .m_rename = lmv_rename,
3008 .m_setattr = lmv_setattr,
3009 .m_setxattr = lmv_setxattr,
3011 .m_readpage = lmv_readpage,
3012 .m_unlink = lmv_unlink,
3013 .m_init_ea_size = lmv_init_ea_size,
3014 .m_cancel_unused = lmv_cancel_unused,
3015 .m_set_lock_data = lmv_set_lock_data,
3016 .m_lock_match = lmv_lock_match,
3017 .m_get_lustre_md = lmv_get_lustre_md,
3018 .m_free_lustre_md = lmv_free_lustre_md,
3019 .m_set_open_replay_data = lmv_set_open_replay_data,
3020 .m_clear_open_replay_data = lmv_clear_open_replay_data,
3021 .m_renew_capa = lmv_renew_capa,
3022 .m_unpack_capa = lmv_unpack_capa,
3023 .m_get_remote_perm = lmv_get_remote_perm,
3024 .m_intent_getattr_async = lmv_intent_getattr_async,
3025 .m_revalidate_lock = lmv_revalidate_lock
3028 static quota_interface_t *quota_interface;
3029 extern quota_interface_t lmv_quota_interface;
3031 int __init lmv_init(void)
3033 struct lprocfs_static_vars lvars;
3036 lmv_object_cache = cfs_mem_cache_create("lmv_objects",
3037 sizeof(struct lmv_object),
3039 if (!lmv_object_cache) {
3040 CERROR("Error allocating lmv objects cache\n");
3044 lprocfs_lmv_init_vars(&lvars);
3046 request_module("lquota");
3047 quota_interface = PORTAL_SYMBOL_GET(lmv_quota_interface);
3048 init_obd_quota_ops(quota_interface, &lmv_obd_ops);
3050 rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
3051 lvars.module_vars, LUSTRE_LMV_NAME, NULL);
3053 if (quota_interface)
3054 PORTAL_SYMBOL_PUT(lmv_quota_interface);
3055 cfs_mem_cache_destroy(lmv_object_cache);
3062 static void lmv_exit(void)
3064 if (quota_interface)
3065 PORTAL_SYMBOL_PUT(lmv_quota_interface);
3067 class_unregister_type(LUSTRE_LMV_NAME);
3069 LASSERTF(atomic_read(&lmv_object_count) == 0,
3070 "Can't free lmv objects cache, %d object(s) busy\n",
3071 atomic_read(&lmv_object_count));
3072 cfs_mem_cache_destroy(lmv_object_cache);
3075 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3076 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
3077 MODULE_LICENSE("GPL");
3079 module_init(lmv_init);
3080 module_exit(lmv_exit);