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 lustre_handle *conn, 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 obd_export *exp;
254 rc = class_connect(conn, obd, cluuid);
256 CERROR("class_connection() returned %d\n", rc);
260 exp = class_conn2export(conn);
263 * We don't want to actually do the underlying connections more than
264 * once, so keep track.
267 if (lmv->refcount > 1) {
268 class_export_put(exp);
274 lmv->cluuid = *cluuid;
277 lmv->conn_data = *data;
280 lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
282 if (IS_ERR(lmv_proc_dir)) {
283 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
284 obd->obd_type->typ_name, obd->obd_name);
290 * All real clients should perform actual connection right away, because
291 * it is possible, that LMV will not have opportunity to connect targets
292 * and MDC stuff will be called directly, for instance while reading
293 * ../mdc/../kbytesfree procfs file, etc.
295 if (data->ocd_connect_flags & OBD_CONNECT_REAL)
296 rc = lmv_check_connect(obd);
301 lprocfs_remove(&lmv_proc_dir);
308 static void lmv_set_timeouts(struct obd_device *obd)
310 struct lmv_tgt_desc *tgts;
315 if (lmv->server_timeout == 0)
318 if (lmv->connected == 0)
321 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
322 if (tgts->ltd_exp == NULL)
325 obd_set_info_async(tgts->ltd_exp, sizeof(KEY_INTERMDS),
326 KEY_INTERMDS, 0, NULL, NULL);
330 static int lmv_init_ea_size(struct obd_export *exp, int easize,
331 int def_easize, int cookiesize)
333 struct obd_device *obd = exp->exp_obd;
334 struct lmv_obd *lmv = &obd->u.lmv;
340 if (lmv->max_easize < easize) {
341 lmv->max_easize = easize;
344 if (lmv->max_def_easize < def_easize) {
345 lmv->max_def_easize = def_easize;
348 if (lmv->max_cookiesize < cookiesize) {
349 lmv->max_cookiesize = cookiesize;
355 if (lmv->connected == 0)
358 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
359 if (lmv->tgts[i].ltd_exp == NULL) {
360 CWARN("%s: NULL export for %d\n", obd->obd_name, i);
364 rc = md_init_ea_size(lmv->tgts[i].ltd_exp, easize, def_easize,
367 CERROR("obd_init_ea_size() failed on MDT target %d, "
368 "error %d.\n", i, rc);
375 #define MAX_STRING_SIZE 128
377 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
380 struct proc_dir_entry *lmv_proc_dir;
382 struct lmv_obd *lmv = &obd->u.lmv;
383 struct obd_uuid *cluuid = &lmv->cluuid;
384 struct obd_connect_data *mdc_data = NULL;
385 struct obd_uuid lmv_mdc_uuid = { "LMV_MDC_UUID" };
386 struct lustre_handle conn = {0, };
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, &conn, mdc_obd, &lmv_mdc_uuid,
411 &lmv->conn_data, NULL);
413 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
417 mdc_exp = class_conn2export(&conn);
420 * Init fid sequence client for this mdc and add new fld target.
422 rc = obd_fid_init(mdc_exp);
426 target.ft_srv = NULL;
427 target.ft_exp = mdc_exp;
428 target.ft_idx = tgt->ltd_idx;
430 fld_client_add_target(&lmv->lmv_fld, &target);
432 mdc_data = &class_exp2cliimp(mdc_exp)->imp_connect_data;
434 rc = obd_register_observer(mdc_obd, obd);
436 obd_disconnect(mdc_exp);
437 CERROR("target %s register_observer error %d\n",
438 tgt->ltd_uuid.uuid, rc);
442 if (obd->obd_observer) {
444 * Tell the observer about the new target.
446 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
447 OBD_NOTIFY_ACTIVE, (void *)(tgt - lmv->tgts));
449 obd_disconnect(mdc_exp);
455 tgt->ltd_exp = mdc_exp;
456 lmv->desc.ld_active_tgt_count++;
459 * Copy connect data, it may be used later.
461 lmv->datas[tgt->ltd_idx] = *mdc_data;
463 md_init_ea_size(tgt->ltd_exp, lmv->max_easize,
464 lmv->max_def_easize, lmv->max_cookiesize);
466 CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
467 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
468 atomic_read(&obd->obd_refcount));
471 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
473 struct proc_dir_entry *mdc_symlink;
474 char name[MAX_STRING_SIZE + 1];
476 LASSERT(mdc_obd->obd_type != NULL);
477 LASSERT(mdc_obd->obd_type->typ_name != NULL);
478 name[MAX_STRING_SIZE] = '\0';
479 snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
480 mdc_obd->obd_type->typ_name,
482 mdc_symlink = proc_symlink(mdc_obd->obd_name,
484 if (mdc_symlink == NULL) {
485 CERROR("Could not register LMV target "
486 "/proc/fs/lustre/%s/%s/target_obds/%s.",
487 obd->obd_type->typ_name, obd->obd_name,
489 lprocfs_remove(&lmv_proc_dir);
497 int lmv_add_target(struct obd_device *obd, struct obd_uuid *tgt_uuid)
499 struct lmv_obd *lmv = &obd->u.lmv;
500 struct lmv_tgt_desc *tgt;
504 CDEBUG(D_CONFIG, "Target uuid: %s.\n", tgt_uuid->uuid);
508 if (lmv->desc.ld_active_tgt_count >= LMV_MAX_TGT_COUNT) {
509 lmv_init_unlock(lmv);
510 CERROR("Can't add %s, LMV module compiled for %d MDCs. "
511 "That many MDCs already configured.\n",
512 tgt_uuid->uuid, LMV_MAX_TGT_COUNT);
515 if (lmv->desc.ld_tgt_count == 0) {
516 struct obd_device *mdc_obd;
518 mdc_obd = class_find_client_obd(tgt_uuid, LUSTRE_MDC_NAME,
521 lmv_init_unlock(lmv);
522 CERROR("Target %s not attached\n", tgt_uuid->uuid);
526 rc = obd_llog_init(obd, &obd->obd_olg, mdc_obd, 0, NULL, tgt_uuid);
528 lmv_init_unlock(lmv);
529 CERROR("lmv failed to setup llogging subsystems\n");
532 spin_lock(&lmv->lmv_lock);
533 tgt = lmv->tgts + lmv->desc.ld_tgt_count++;
534 tgt->ltd_uuid = *tgt_uuid;
535 spin_unlock(&lmv->lmv_lock);
537 if (lmv->connected) {
538 rc = lmv_connect_mdc(obd, tgt);
540 spin_lock(&lmv->lmv_lock);
541 lmv->desc.ld_tgt_count--;
542 memset(tgt, 0, sizeof(*tgt));
543 spin_unlock(&lmv->lmv_lock);
545 int easize = sizeof(struct lmv_stripe_md) +
546 lmv->desc.ld_tgt_count *
547 sizeof(struct lu_fid);
548 lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
552 lmv_init_unlock(lmv);
556 int lmv_check_connect(struct obd_device *obd)
558 struct lmv_obd *lmv = &obd->u.lmv;
559 struct lmv_tgt_desc *tgt;
569 if (lmv->connected) {
570 lmv_init_unlock(lmv);
574 if (lmv->desc.ld_tgt_count == 0) {
575 CERROR("%s: no targets configured.\n", obd->obd_name);
579 CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
580 lmv->cluuid.uuid, obd->obd_name);
582 LASSERT(lmv->tgts != NULL);
584 for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
585 rc = lmv_connect_mdc(obd, tgt);
590 lmv_set_timeouts(obd);
591 class_export_put(lmv->exp);
593 easize = lmv_get_easize(lmv);
594 lmv_init_ea_size(obd->obd_self_export, easize, 0, 0);
595 lmv_init_unlock(lmv);
604 --lmv->desc.ld_active_tgt_count;
605 rc2 = obd_disconnect(tgt->ltd_exp);
607 CERROR("LMV target %s disconnect on "
608 "MDC idx %d: error %d\n",
609 tgt->ltd_uuid.uuid, i, rc2);
613 class_disconnect(lmv->exp);
614 lmv_init_unlock(lmv);
618 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
621 struct proc_dir_entry *lmv_proc_dir;
623 struct lmv_obd *lmv = &obd->u.lmv;
624 struct obd_device *mdc_obd;
628 LASSERT(tgt != NULL);
629 LASSERT(obd != NULL);
631 mdc_obd = class_exp2obd(tgt->ltd_exp);
634 mdc_obd->obd_no_recov = obd->obd_no_recov;
637 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
639 struct proc_dir_entry *mdc_symlink;
641 mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
643 lprocfs_remove(&mdc_symlink);
645 CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
646 obd->obd_type->typ_name, obd->obd_name,
651 rc = obd_fid_fini(tgt->ltd_exp);
653 CERROR("Can't finanize fids factory\n");
655 CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
656 tgt->ltd_exp->exp_obd->obd_name,
657 tgt->ltd_exp->exp_obd->obd_uuid.uuid);
659 obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
660 rc = obd_disconnect(tgt->ltd_exp);
662 if (tgt->ltd_active) {
663 CERROR("Target %s disconnect error %d\n",
664 tgt->ltd_uuid.uuid, rc);
668 lmv_activate_target(lmv, tgt, 0);
673 static int lmv_disconnect(struct obd_export *exp)
675 struct obd_device *obd = class_exp2obd(exp);
677 struct proc_dir_entry *lmv_proc_dir;
679 struct lmv_obd *lmv = &obd->u.lmv;
688 * Only disconnect the underlying layers on the final disconnect.
691 if (lmv->refcount != 0)
694 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
695 if (lmv->tgts[i].ltd_exp == NULL)
697 lmv_disconnect_mdc(obd, &lmv->tgts[i]);
701 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
703 lprocfs_remove(&lmv_proc_dir);
705 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
706 obd->obd_type->typ_name, obd->obd_name);
712 * This is the case when no real connection is established by
713 * lmv_check_connect().
716 class_export_put(exp);
717 rc = class_disconnect(exp);
718 if (lmv->refcount == 0)
723 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
724 int len, void *karg, void *uarg)
726 struct obd_device *obddev = class_exp2obd(exp);
727 struct lmv_obd *lmv = &obddev->u.lmv;
733 if (lmv->desc.ld_tgt_count == 0)
737 case IOC_OBD_STATFS: {
738 struct obd_ioctl_data *data = karg;
739 struct obd_device *mdc_obd;
740 struct obd_statfs stat_buf = {0};
743 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
744 LASSERT(data->ioc_plen1 == sizeof(struct obd_statfs));
746 if ((index >= lmv->desc.ld_tgt_count))
749 if (!lmv->tgts[index].ltd_active)
752 mdc_obd = class_exp2obd(lmv->tgts[index].ltd_exp);
756 rc = obd_statfs(mdc_obd, &stat_buf,
757 cfs_time_current_64() - HZ, 0);
760 if (copy_to_user(data->ioc_pbuf1, &stat_buf, data->ioc_plen1))
762 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
768 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
771 if (lmv->tgts[i].ltd_exp == NULL)
774 err = obd_iocontrol(cmd, lmv->tgts[i].ltd_exp, len,
777 if (lmv->tgts[i].ltd_active) {
778 CERROR("error: iocontrol MDC %s on MDT"
779 "idx %d cmd %x: err = %d\n",
780 lmv->tgts[i].ltd_uuid.uuid,
795 static int lmv_all_chars_policy(int count, const char *name,
806 static int lmv_nid_policy(struct lmv_obd *lmv)
808 struct obd_import *imp;
812 * XXX: To get nid we assume that underlying obd device is mdc.
814 imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
815 id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
816 return id % lmv->desc.ld_tgt_count;
819 static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
820 placement_policy_t placement)
823 case PLACEMENT_CHAR_POLICY:
824 return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
826 op_data->op_namelen);
827 case PLACEMENT_NID_POLICY:
828 return lmv_nid_policy(lmv);
834 CERROR("Unsupported placement policy %x\n", placement);
839 * This is _inode_ placement policy function (not name).
841 static int lmv_placement_policy(struct obd_device *obd,
842 struct md_op_data *op_data,
845 struct lmv_obd *lmv = &obd->u.lmv;
846 struct lmv_object *obj;
850 LASSERT(mds != NULL);
852 if (lmv->desc.ld_tgt_count == 1) {
858 * Allocate new fid on target according to operation type and parent
861 obj = lmv_object_find(obd, &op_data->op_fid1);
862 if (obj != NULL || op_data->op_name == NULL ||
863 op_data->op_opc != LUSTRE_OPC_MKDIR) {
865 * Allocate fid for non-dir or for null name or for case parent
872 * If we have this flag turned on, and we see that
873 * parent dir is split, this means, that caller did not
874 * notice split yet. This is race and we would like to
875 * let caller know that.
877 if (op_data->op_bias & MDS_CHECK_SPLIT)
882 * Allocate new fid on same mds where parent fid is located and
883 * where operation will be sent. In case of split dir, ->op_fid1
884 * and ->op_mds here will contain fid and mds of slave directory
885 * object (assigned by caller).
887 *mds = op_data->op_mds;
891 * Parent directory is not split and we want to create a
892 * directory in it. Let's calculate where to place it according
893 * to operation data @op_data.
895 *mds = lmv_choose_mds(lmv, op_data, lmv->lmv_placement);
900 CERROR("Can't choose MDS, err = %d\n", rc);
902 LASSERT(*mds < lmv->desc.ld_tgt_count);
908 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid,
911 struct lmv_tgt_desc *tgt;
915 tgt = lmv_get_target(lmv, mds);
918 * New seq alloc and FLD setup should be atomic. Otherwise we may find
919 * on server that seq in new allocated fid is not yet known.
921 down(&tgt->ltd_fid_sem);
923 if (!tgt->ltd_active)
924 GOTO(out, rc = -ENODEV);
927 * Asking underlaying tgt layer to allocate new fid.
929 rc = obd_fid_alloc(tgt->ltd_exp, fid, NULL);
931 LASSERT(fid_is_sane(fid));
934 * Client switches to new sequence, setup FLD.
936 rc = fld_client_create(&lmv->lmv_fld, fid_seq(fid),
940 * Delete just allocated fid sequence in case
943 CERROR("Can't create fld entry, rc %d\n", rc);
944 obd_fid_delete(tgt->ltd_exp, NULL);
950 up(&tgt->ltd_fid_sem);
954 int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
955 struct md_op_data *op_data)
957 struct obd_device *obd = class_exp2obd(exp);
958 struct lmv_obd *lmv = &obd->u.lmv;
963 LASSERT(op_data != NULL);
964 LASSERT(fid != NULL);
966 rc = lmv_placement_policy(obd, op_data, &mds);
968 CERROR("Can't get target for allocating fid, "
973 rc = __lmv_fid_alloc(lmv, fid, mds);
975 CERROR("Can't alloc new fid, rc %d\n", rc);
982 static int lmv_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
985 LASSERT(exp != NULL && fid != NULL);
986 if (lmv_object_delete(exp, fid)) {
987 CDEBUG(D_INODE, "Object "DFID" is destroyed.\n",
993 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
995 struct lmv_obd *lmv = &obd->u.lmv;
996 struct lprocfs_static_vars lvars;
997 struct lmv_desc *desc;
1002 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1003 CERROR("LMV setup requires a descriptor\n");
1007 desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1008 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1009 CERROR("Lmv descriptor size wrong: %d > %d\n",
1010 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1014 lmv->tgts_size = LMV_MAX_TGT_COUNT * sizeof(struct lmv_tgt_desc);
1016 OBD_ALLOC(lmv->tgts, lmv->tgts_size);
1017 if (lmv->tgts == NULL)
1020 for (i = 0; i < LMV_MAX_TGT_COUNT; i++) {
1021 sema_init(&lmv->tgts[i].ltd_fid_sem, 1);
1022 lmv->tgts[i].ltd_idx = i;
1025 lmv->datas_size = LMV_MAX_TGT_COUNT * sizeof(struct obd_connect_data);
1027 OBD_ALLOC(lmv->datas, lmv->datas_size);
1028 if (lmv->datas == NULL)
1029 GOTO(out_free_tgts, rc = -ENOMEM);
1031 obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1032 lmv->desc.ld_tgt_count = 0;
1033 lmv->desc.ld_active_tgt_count = 0;
1034 lmv->max_cookiesize = 0;
1035 lmv->max_def_easize = 0;
1036 lmv->max_easize = 0;
1037 lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
1039 spin_lock_init(&lmv->lmv_lock);
1040 sema_init(&lmv->init_sem, 1);
1042 rc = lmv_object_setup(obd);
1044 CERROR("Can't setup LMV object manager, error %d.\n", rc);
1045 GOTO(out_free_datas, rc);
1048 lprocfs_lmv_init_vars(&lvars);
1049 lprocfs_obd_setup(obd, lvars.obd_vars);
1052 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd_status",
1053 0444, &lmv_proc_target_fops, obd);
1055 CWARN("Error adding target_obd_stats file (%d)\n", rc);
1058 rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1059 LUSTRE_CLI_FLD_HASH_DHT);
1061 CERROR("Can't init FLD, err %d\n", rc);
1062 GOTO(out_free_datas, rc);
1068 OBD_FREE(lmv->datas, lmv->datas_size);
1071 OBD_FREE(lmv->tgts, lmv->tgts_size);
1076 static int lmv_cleanup(struct obd_device *obd)
1078 struct lmv_obd *lmv = &obd->u.lmv;
1081 fld_client_fini(&lmv->lmv_fld);
1082 lprocfs_obd_cleanup(obd);
1083 lmv_object_cleanup(obd);
1084 OBD_FREE(lmv->datas, lmv->datas_size);
1085 OBD_FREE(lmv->tgts, lmv->tgts_size);
1090 static int lmv_process_config(struct obd_device *obd, obd_count len, void *buf)
1092 struct lustre_cfg *lcfg = buf;
1093 struct obd_uuid tgt_uuid;
1097 switch(lcfg->lcfg_command) {
1099 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(tgt_uuid.uuid))
1100 GOTO(out, rc = -EINVAL);
1102 obd_str2uuid(&tgt_uuid, lustre_cfg_string(lcfg, 1));
1103 rc = lmv_add_target(obd, &tgt_uuid);
1106 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1107 GOTO(out, rc = -EINVAL);
1114 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1115 __u64 max_age, __u32 flags)
1117 struct lmv_obd *lmv = &obd->u.lmv;
1118 struct obd_statfs *temp;
1123 rc = lmv_check_connect(obd);
1127 OBD_ALLOC(temp, sizeof(*temp));
1131 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1132 if (lmv->tgts[i].ltd_exp == NULL)
1135 rc = obd_statfs(lmv->tgts[i].ltd_exp->exp_obd, temp,
1138 CERROR("can't stat MDS #%d (%s), error %d\n", i,
1139 lmv->tgts[i].ltd_exp->exp_obd->obd_name,
1141 GOTO(out_free_temp, rc);
1146 osfs->os_bavail += temp->os_bavail;
1147 osfs->os_blocks += temp->os_blocks;
1148 osfs->os_ffree += temp->os_ffree;
1149 osfs->os_files += temp->os_files;
1155 OBD_FREE(temp, sizeof(*temp));
1159 static int lmv_getstatus(struct obd_export *exp,
1161 struct obd_capa **pc)
1163 struct obd_device *obd = exp->exp_obd;
1164 struct lmv_obd *lmv = &obd->u.lmv;
1168 rc = lmv_check_connect(obd);
1172 rc = md_getstatus(lmv->tgts[0].ltd_exp, fid, pc);
1176 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1177 struct obd_capa *oc, obd_valid valid, const char *name,
1178 const char *input, int input_size, int output_size,
1179 int flags, struct ptlrpc_request **request)
1181 struct obd_device *obd = exp->exp_obd;
1182 struct lmv_obd *lmv = &obd->u.lmv;
1183 struct lmv_tgt_desc *tgt;
1187 rc = lmv_check_connect(obd);
1191 tgt = lmv_find_target(lmv, fid);
1193 RETURN(PTR_ERR(tgt));
1195 rc = md_getxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1196 input_size, output_size, flags, request);
1201 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1202 struct obd_capa *oc, obd_valid valid, const char *name,
1203 const char *input, int input_size, int output_size,
1204 int flags, __u32 suppgid,
1205 struct ptlrpc_request **request)
1207 struct obd_device *obd = exp->exp_obd;
1208 struct lmv_obd *lmv = &obd->u.lmv;
1209 struct lmv_tgt_desc *tgt;
1213 rc = lmv_check_connect(obd);
1217 tgt = lmv_find_target(lmv, fid);
1219 RETURN(PTR_ERR(tgt));
1221 rc = md_setxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1222 input_size, output_size, flags, suppgid,
1228 static int lmv_getattr(struct obd_export *exp, const struct lu_fid *fid,
1229 struct obd_capa *oc, obd_valid valid, int ea_size,
1230 struct ptlrpc_request **request)
1232 struct obd_device *obd = exp->exp_obd;
1233 struct lmv_obd *lmv = &obd->u.lmv;
1234 struct lmv_tgt_desc *tgt;
1235 struct lmv_object *obj;
1240 rc = lmv_check_connect(obd);
1244 tgt = lmv_find_target(lmv, fid);
1246 RETURN(PTR_ERR(tgt));
1248 rc = md_getattr(tgt->ltd_exp, fid, oc, valid, ea_size, request);
1252 obj = lmv_object_find_lock(obd, fid);
1254 CDEBUG(D_INODE, "GETATTR for "DFID" %s\n", PFID(fid),
1255 obj ? "(split)" : "");
1258 * If object is split, then we loop over all the slaves and gather size
1259 * attribute. In ideal world we would have to gather also mds field from
1260 * all slaves, as object is spread over the cluster and this is
1261 * definitely interesting information and it is not good to loss it,
1265 struct mdt_body *body;
1267 if (*request == NULL) {
1268 lmv_object_put(obj);
1272 body = req_capsule_server_get(&(*request)->rq_pill,
1274 LASSERT(body != NULL);
1276 for (i = 0; i < obj->lo_objcount; i++) {
1277 if (lmv->tgts[i].ltd_exp == NULL) {
1278 CWARN("%s: NULL export for %d\n",
1284 * Skip master object.
1286 if (lu_fid_eq(&obj->lo_fid, &obj->lo_stripes[i].ls_fid))
1289 body->size += obj->lo_stripes[i].ls_size;
1292 lmv_object_put_unlock(obj);
1298 static int lmv_change_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1299 ldlm_iterator_t it, void *data)
1301 struct obd_device *obd = exp->exp_obd;
1302 struct lmv_obd *lmv = &obd->u.lmv;
1307 rc = lmv_check_connect(obd);
1311 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1314 * With CMD every object can have two locks in different namespaces:
1315 * lookup lock in space of mds storing direntry and update/open lock in
1316 * space of mds storing inode.
1318 for (i = 0; i < lmv->desc.ld_tgt_count; i++)
1319 md_change_cbdata(lmv->tgts[i].ltd_exp, fid, it, data);
1324 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1325 struct md_open_data *mod, struct ptlrpc_request **request)
1327 struct obd_device *obd = exp->exp_obd;
1328 struct lmv_obd *lmv = &obd->u.lmv;
1329 struct lmv_tgt_desc *tgt;
1333 rc = lmv_check_connect(obd);
1337 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1339 RETURN(PTR_ERR(tgt));
1341 CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1342 rc = md_close(tgt->ltd_exp, op_data, mod, request);
1347 * Called in the case MDS returns -ERESTART on create on open, what means that
1348 * directory is split and its LMV presentation object has to be updated.
1350 int lmv_handle_split(struct obd_export *exp, const struct lu_fid *fid)
1352 struct obd_device *obd = exp->exp_obd;
1353 struct lmv_obd *lmv = &obd->u.lmv;
1354 struct ptlrpc_request *req = NULL;
1355 struct lmv_tgt_desc *tgt;
1356 struct lmv_object *obj;
1357 struct lustre_md md;
1364 mealen = lmv_get_easize(lmv);
1366 valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA | OBD_MD_MEA;
1368 tgt = lmv_find_target(lmv, fid);
1370 RETURN(PTR_ERR(tgt));
1373 * Time to update mea of parent fid.
1375 rc = md_getattr(tgt->ltd_exp, fid, NULL, valid, mealen, &req);
1377 CERROR("md_getattr() failed, error %d\n", rc);
1381 rc = md_get_lustre_md(tgt->ltd_exp, req, NULL, exp, &md);
1383 CERROR("md_get_lustre_md() failed, error %d\n", rc);
1388 GOTO(cleanup, rc = -ENODATA);
1390 obj = lmv_object_create(exp, fid, md.mea);
1394 lmv_object_put(obj);
1396 obd_free_memmd(exp, (void *)&md.mea);
1400 ptlrpc_req_finished(req);
1404 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1405 const void *data, int datalen, int mode, __u32 uid,
1406 __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1407 struct ptlrpc_request **request)
1409 struct obd_device *obd = exp->exp_obd;
1410 struct lmv_obd *lmv = &obd->u.lmv;
1411 struct lmv_tgt_desc *tgt;
1412 struct lmv_object *obj;
1418 rc = lmv_check_connect(obd);
1422 if (!lmv->desc.ld_active_tgt_count)
1428 obj = lmv_object_find(obd, &op_data->op_fid1);
1430 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1431 op_data->op_name, op_data->op_namelen);
1432 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1433 op_data->op_bias &= ~MDS_CHECK_SPLIT;
1434 op_data->op_mds = obj->lo_stripes[sidx].ls_mds;
1435 tgt = lmv_get_target(lmv, op_data->op_mds);
1436 lmv_object_put(obj);
1438 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1439 op_data->op_bias |= MDS_CHECK_SPLIT;
1440 op_data->op_mds = tgt->ltd_idx;
1444 RETURN(PTR_ERR(tgt));
1446 rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
1447 if (rc == -ERESTART)
1452 CDEBUG(D_INODE, "CREATE '%*s' on "DFID" -> mds #"LPU64"\n",
1453 op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1456 op_data->op_flags |= MF_MDC_CANCEL_FID1;
1457 rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1458 cap_effective, rdev, request);
1460 if (*request == NULL)
1462 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1463 } else if (rc == -ERESTART) {
1464 LASSERT(*request != NULL);
1465 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1466 "Got -ERESTART during create!\n");
1467 ptlrpc_req_finished(*request);
1471 * Directory got split. Time to update local object and repeat
1472 * the request with proper MDS.
1474 rc = lmv_handle_split(exp, &op_data->op_fid1);
1476 rc = lmv_allocate_slaves(obd, &op_data->op_fid1,
1477 op_data, &op_data->op_fid2);
1486 static int lmv_done_writing(struct obd_export *exp,
1487 struct md_op_data *op_data,
1488 struct md_open_data *mod)
1490 struct obd_device *obd = exp->exp_obd;
1491 struct lmv_obd *lmv = &obd->u.lmv;
1492 struct lmv_tgt_desc *tgt;
1496 rc = lmv_check_connect(obd);
1500 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1502 RETURN(PTR_ERR(tgt));
1504 rc = md_done_writing(tgt->ltd_exp, op_data, mod);
1509 lmv_enqueue_slaves(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1510 struct lookup_intent *it, struct md_op_data *op_data,
1511 struct lustre_handle *lockh, void *lmm, int lmmsize)
1513 struct obd_device *obd = exp->exp_obd;
1514 struct lmv_obd *lmv = &obd->u.lmv;
1515 struct lmv_stripe_md *mea = op_data->op_mea1;
1516 struct md_op_data *op_data2;
1517 struct lmv_tgt_desc *tgt;
1522 OBD_ALLOC_PTR(op_data2);
1523 if (op_data2 == NULL)
1526 LASSERT(mea != NULL);
1527 for (i = 0; i < mea->mea_count; i++) {
1528 memset(op_data2, 0, sizeof(*op_data2));
1529 op_data2->op_fid1 = mea->mea_ids[i];
1530 op_data2->op_bias = 0;
1532 tgt = lmv_find_target(lmv, &op_data2->op_fid1);
1534 GOTO(cleanup, rc = PTR_ERR(tgt));
1536 if (tgt->ltd_exp == NULL)
1539 rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data2,
1540 lockh + i, lmm, lmmsize, NULL, 0);
1542 CDEBUG(D_INODE, "Take lock on slave "DFID" -> %d/%d\n",
1543 PFID(&mea->mea_ids[i]), rc, it->d.lustre.it_status);
1548 if (it->d.lustre.it_data) {
1549 struct ptlrpc_request *req;
1550 req = (struct ptlrpc_request *)it->d.lustre.it_data;
1551 ptlrpc_req_finished(req);
1554 if (it->d.lustre.it_status)
1555 GOTO(cleanup, rc = it->d.lustre.it_status);
1560 OBD_FREE_PTR(op_data2);
1564 * Drop all taken locks.
1567 if (lockh[i].cookie)
1568 ldlm_lock_decref(lockh + i, einfo->ei_mode);
1569 lockh[i].cookie = 0;
1576 lmv_enqueue_remote(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1577 struct lookup_intent *it, struct md_op_data *op_data,
1578 struct lustre_handle *lockh, void *lmm, int lmmsize,
1579 int extra_lock_flags)
1581 struct ptlrpc_request *req = it->d.lustre.it_data;
1582 struct obd_device *obd = exp->exp_obd;
1583 struct lmv_obd *lmv = &obd->u.lmv;
1584 struct lustre_handle plock;
1585 struct lmv_tgt_desc *tgt;
1586 struct md_op_data *rdata;
1588 struct mdt_body *body;
1593 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1594 LASSERT(body != NULL);
1596 if (!(body->valid & OBD_MD_MDS))
1599 CDEBUG(D_INODE, "REMOTE_ENQUEUE '%s' on "DFID" -> "DFID"\n",
1600 LL_IT2STR(it), PFID(&op_data->op_fid1), PFID(&body->fid1));
1603 * We got LOOKUP lock, but we really need attrs.
1605 pmode = it->d.lustre.it_lock_mode;
1606 LASSERT(pmode != 0);
1607 memcpy(&plock, lockh, sizeof(plock));
1608 it->d.lustre.it_lock_mode = 0;
1609 it->d.lustre.it_data = NULL;
1612 it->d.lustre.it_disposition &= ~DISP_ENQ_COMPLETE;
1613 ptlrpc_req_finished(req);
1615 tgt = lmv_find_target(lmv, &fid1);
1617 GOTO(out, rc = PTR_ERR(tgt));
1619 OBD_ALLOC_PTR(rdata);
1621 GOTO(out, rc = -ENOMEM);
1623 rdata->op_fid1 = fid1;
1624 rdata->op_bias = MDS_CROSS_REF;
1626 rc = md_enqueue(tgt->ltd_exp, einfo, it, rdata, lockh,
1627 lmm, lmmsize, NULL, extra_lock_flags);
1628 OBD_FREE_PTR(rdata);
1631 ldlm_lock_decref(&plock, pmode);
1636 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1637 struct lookup_intent *it, struct md_op_data *op_data,
1638 struct lustre_handle *lockh, void *lmm, int lmmsize,
1639 struct ptlrpc_request **req, int extra_lock_flags)
1641 struct obd_device *obd = exp->exp_obd;
1642 struct lmv_obd *lmv = &obd->u.lmv;
1643 struct lmv_tgt_desc *tgt;
1644 struct lmv_object *obj;
1649 rc = lmv_check_connect(obd);
1653 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
1654 LL_IT2STR(it), PFID(&op_data->op_fid1));
1656 if (op_data->op_mea1 && it && it->it_op == IT_UNLINK) {
1657 rc = lmv_enqueue_slaves(exp, einfo, it, op_data,
1658 lockh, lmm, lmmsize);
1662 obj = lmv_object_find(obd, &op_data->op_fid1);
1663 if (obj && op_data->op_namelen) {
1664 sidx = raw_name2idx(obj->lo_hashtype,
1666 (char *)op_data->op_name,
1667 op_data->op_namelen);
1668 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1669 tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
1671 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1674 lmv_object_put(obj);
1677 RETURN(PTR_ERR(tgt));
1679 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%d\n",
1680 LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
1682 rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data, lockh,
1683 lmm, lmmsize, req, extra_lock_flags);
1685 if (rc == 0 && it && it->it_op == IT_OPEN) {
1686 rc = lmv_enqueue_remote(exp, einfo, it, op_data, lockh,
1687 lmm, lmmsize, extra_lock_flags);
1693 lmv_getattr_name(struct obd_export *exp, const struct lu_fid *fid,
1694 struct obd_capa *oc, const char *name, int namelen,
1695 obd_valid valid, int ea_size, __u32 suppgid,
1696 struct ptlrpc_request **request)
1698 struct ptlrpc_request *req = NULL;
1699 struct obd_device *obd = exp->exp_obd;
1700 struct lmv_obd *lmv = &obd->u.lmv;
1701 struct lu_fid rid = *fid;
1702 struct lmv_tgt_desc *tgt;
1703 struct mdt_body *body;
1704 struct lmv_object *obj;
1710 rc = lmv_check_connect(obd);
1717 obj = lmv_object_find(obd, &rid);
1719 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1721 rid = obj->lo_stripes[sidx].ls_fid;
1722 tgt = lmv_get_target(lmv, obj->lo_stripes[sidx].ls_mds);
1723 valid &= ~OBD_MD_FLCKSPLIT;
1724 lmv_object_put(obj);
1726 tgt = lmv_find_target(lmv, &rid);
1727 valid |= OBD_MD_FLCKSPLIT;
1730 RETURN(PTR_ERR(tgt));
1732 CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" - "DFID" -> mds #%d\n",
1733 namelen, name, PFID(fid), PFID(&rid), tgt->ltd_idx);
1735 rc = md_getattr_name(tgt->ltd_exp, &rid, oc, name, namelen, valid,
1736 ea_size, suppgid, request);
1738 body = req_capsule_server_get(&(*request)->rq_pill,
1740 LASSERT(body != NULL);
1742 if (body->valid & OBD_MD_MDS) {
1744 CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1747 tgt = lmv_find_target(lmv, &rid);
1749 ptlrpc_req_finished(*request);
1750 RETURN(PTR_ERR(tgt));
1753 rc = md_getattr_name(tgt->ltd_exp, &rid, NULL, NULL,
1754 1, valid | OBD_MD_FLCROSSREF,
1755 ea_size, suppgid, &req);
1756 ptlrpc_req_finished(*request);
1759 } else if (rc == -ERESTART) {
1760 LASSERT(*request != NULL);
1761 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1762 "Got -ERESTART during getattr!\n");
1763 ptlrpc_req_finished(*request);
1767 * Directory got split. Time to update local object and repeat
1768 * the request with proper MDS.
1770 rc = lmv_handle_split(exp, &rid);
1777 #define md_op_data_fid(op_data, fl) \
1778 (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1779 fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1780 fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1781 fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1784 static int lmv_early_cancel_slaves(struct obd_export *exp,
1785 struct md_op_data *op_data, int op_tgt,
1786 ldlm_mode_t mode, int bits, int flag)
1788 struct obd_device *obd = exp->exp_obd;
1789 struct lmv_obd *lmv = &obd->u.lmv;
1790 ldlm_policy_data_t policy = {{0}};
1791 struct lu_fid *op_fid;
1792 struct lu_fid *st_fid;
1793 struct lmv_tgt_desc *tgt;
1794 struct lmv_object *obj;
1799 op_fid = md_op_data_fid(op_data, flag);
1800 if (!fid_is_sane(op_fid))
1803 obj = lmv_object_find(obd, op_fid);
1807 policy.l_inodebits.bits = bits;
1808 for (i = 0; i < obj->lo_objcount; i++) {
1809 tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
1810 st_fid = &obj->lo_stripes[i].ls_fid;
1811 if (op_tgt != tgt->ltd_idx) {
1812 CDEBUG(D_INODE, "EARLY_CANCEL slave "DFID" -> mds #%d\n",
1813 PFID(st_fid), tgt->ltd_idx);
1814 rc = md_cancel_unused(tgt->ltd_exp, st_fid, &policy,
1815 mode, LDLM_FL_ASYNC, NULL);
1817 GOTO(out_put_obj, rc);
1820 "EARLY_CANCEL skip operation target %d on "DFID"\n",
1821 op_tgt, PFID(st_fid));
1823 * Do not cancel locks for operation target, they will
1824 * be handled later in underlaying layer when calling
1825 * function we run on behalf of.
1828 op_data->op_flags |= flag;
1833 lmv_object_put(obj);
1837 static int lmv_early_cancel(struct obd_export *exp, struct md_op_data *op_data,
1838 int op_tgt, ldlm_mode_t mode, int bits, int flag)
1840 struct lu_fid *fid = md_op_data_fid(op_data, flag);
1841 struct obd_device *obd = exp->exp_obd;
1842 struct lmv_obd *lmv = &obd->u.lmv;
1843 struct lmv_tgt_desc *tgt;
1844 ldlm_policy_data_t policy = {{0}};
1845 struct lmv_object *obj;
1849 if (!fid_is_sane(fid))
1852 obj = lmv_object_find(obd, fid);
1854 rc = lmv_early_cancel_slaves(exp, op_data, op_tgt, mode,
1856 lmv_object_put(obj);
1858 tgt = lmv_find_target(lmv, fid);
1860 RETURN(PTR_ERR(tgt));
1862 if (tgt->ltd_idx != op_tgt) {
1863 CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1864 policy.l_inodebits.bits = bits;
1865 rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1866 mode, LDLM_FL_ASYNC, NULL);
1869 "EARLY_CANCEL skip operation target %d on "DFID"\n",
1871 op_data->op_flags |= flag;
1880 * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1883 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1884 struct ptlrpc_request **request)
1886 struct obd_device *obd = exp->exp_obd;
1887 struct lmv_obd *lmv = &obd->u.lmv;
1888 struct lmv_tgt_desc *tgt;
1889 struct lmv_object *obj;
1896 rc = lmv_check_connect(obd);
1903 LASSERT(op_data->op_namelen != 0);
1905 CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
1906 PFID(&op_data->op_fid2), op_data->op_namelen,
1907 op_data->op_name, PFID(&op_data->op_fid1));
1909 obj = lmv_object_find(obd, &op_data->op_fid2);
1911 sidx = raw_name2idx(obj->lo_hashtype,
1914 op_data->op_namelen);
1915 op_data->op_fid2 = obj->lo_stripes[sidx].ls_fid;
1916 mds = obj->lo_stripes[sidx].ls_mds;
1917 lmv_object_put(obj);
1919 rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds);
1924 CDEBUG(D_INODE, "Forward to mds #"LPU64" ("DFID")\n",
1925 mds, PFID(&op_data->op_fid1));
1927 op_data->op_fsuid = current->fsuid;
1928 op_data->op_fsgid = current->fsgid;
1929 op_data->op_cap = cfs_curproc_cap_pack();
1930 tgt = lmv_get_target(lmv, mds);
1933 * Cancel UPDATE lock on child (fid1).
1935 op_data->op_flags |= MF_MDC_CANCEL_FID2;
1936 rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
1937 MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
1939 rc = md_link(tgt->ltd_exp, op_data, request);
1940 if (rc == -ERESTART) {
1941 LASSERT(*request != NULL);
1942 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
1943 "Got -ERESTART during link!\n");
1944 ptlrpc_req_finished(*request);
1948 * Directory got split. Time to update local object and repeat
1949 * the request with proper MDS.
1951 rc = lmv_handle_split(exp, &op_data->op_fid2);
1959 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
1960 const char *old, int oldlen, const char *new, int newlen,
1961 struct ptlrpc_request **request)
1963 struct obd_device *obd = exp->exp_obd;
1964 struct lmv_obd *lmv = &obd->u.lmv;
1965 struct lmv_tgt_desc *src_tgt;
1966 struct lmv_tgt_desc *tgt_tgt;
1970 struct lmv_object *obj;
1975 LASSERT(oldlen != 0);
1977 CDEBUG(D_INODE, "RENAME %*s in "DFID" to %*s in "DFID"\n",
1978 oldlen, old, PFID(&op_data->op_fid1),
1979 newlen, new, PFID(&op_data->op_fid2));
1981 rc = lmv_check_connect(obd);
1988 obj = lmv_object_find(obd, &op_data->op_fid1);
1990 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
1991 (char *)old, oldlen);
1992 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
1993 mds1 = obj->lo_stripes[sidx].ls_mds;
1994 CDEBUG(D_INODE, "Parent obj "DFID"\n", PFID(&op_data->op_fid1));
1995 lmv_object_put(obj);
1997 rc = lmv_fld_lookup(lmv, &op_data->op_fid1, &mds1);
2002 obj = lmv_object_find(obd, &op_data->op_fid2);
2005 * Directory is already split, so we have to forward request to
2008 sidx = raw_name2idx(obj->lo_hashtype, obj->lo_objcount,
2009 (char *)new, newlen);
2011 mds2 = obj->lo_stripes[sidx].ls_mds;
2012 op_data->op_fid2 = obj->lo_stripes[sidx].ls_fid;
2013 CDEBUG(D_INODE, "Parent obj "DFID"\n", PFID(&op_data->op_fid2));
2014 lmv_object_put(obj);
2016 rc = lmv_fld_lookup(lmv, &op_data->op_fid2, &mds2);
2021 op_data->op_fsuid = current->fsuid;
2022 op_data->op_fsgid = current->fsgid;
2023 op_data->op_cap = cfs_curproc_cap_pack();
2025 src_tgt = lmv_get_target(lmv, mds1);
2026 tgt_tgt = lmv_get_target(lmv, mds2);
2029 * LOOKUP lock on src child (fid3) should also be cancelled for
2030 * src_tgt in mdc_rename.
2032 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2035 * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
2038 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2039 LCK_EX, MDS_INODELOCK_UPDATE,
2040 MF_MDC_CANCEL_FID2);
2043 * Cancel LOOKUP locks on tgt child (fid4) for parent tgt_tgt.
2046 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2047 LCK_EX, MDS_INODELOCK_LOOKUP,
2048 MF_MDC_CANCEL_FID4);
2052 * Cancel all the locks on tgt child (fid4).
2055 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
2056 LCK_EX, MDS_INODELOCK_FULL,
2057 MF_MDC_CANCEL_FID4);
2060 rc = md_rename(src_tgt->ltd_exp, op_data, old, oldlen,
2061 new, newlen, request);
2063 if (rc == -ERESTART) {
2064 LASSERT(*request != NULL);
2065 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2066 "Got -ERESTART during rename!\n");
2067 ptlrpc_req_finished(*request);
2071 * Directory got split. Time to update local object and repeat
2072 * the request with proper MDS.
2074 rc = lmv_handle_split(exp, &op_data->op_fid1);
2081 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2082 void *ea, int ealen, void *ea2, int ea2len,
2083 struct ptlrpc_request **request,
2084 struct md_open_data **mod)
2086 struct obd_device *obd = exp->exp_obd;
2087 struct lmv_obd *lmv = &obd->u.lmv;
2088 struct ptlrpc_request *req;
2089 struct lmv_tgt_desc *tgt;
2090 struct lmv_object *obj;
2095 rc = lmv_check_connect(obd);
2099 obj = lmv_object_find(obd, &op_data->op_fid1);
2101 CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x%s\n",
2102 PFID(&op_data->op_fid1), op_data->op_attr.ia_valid,
2103 obj ? ", split" : "");
2105 op_data->op_flags |= MF_MDC_CANCEL_FID1;
2107 for (i = 0; i < obj->lo_objcount; i++) {
2108 op_data->op_fid1 = obj->lo_stripes[i].ls_fid;
2110 tgt = lmv_get_target(lmv, obj->lo_stripes[i].ls_mds);
2116 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen,
2117 ea2, ea2len, &req, mod);
2119 if (lu_fid_eq(&obj->lo_fid, &obj->lo_stripes[i].ls_fid)) {
2121 * This is master object and this request should
2122 * be returned back to llite.
2126 ptlrpc_req_finished(req);
2132 lmv_object_put(obj);
2134 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2136 RETURN(PTR_ERR(tgt));
2138 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, ea2,
2139 ea2len, request, mod);
2144 static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
2145 struct obd_capa *oc, struct ptlrpc_request **request)
2147 struct obd_device *obd = exp->exp_obd;
2148 struct lmv_obd *lmv = &obd->u.lmv;
2149 struct lmv_tgt_desc *tgt;
2153 rc = lmv_check_connect(obd);
2157 tgt = lmv_find_target(lmv, fid);
2159 RETURN(PTR_ERR(tgt));
2161 rc = md_sync(tgt->ltd_exp, fid, oc, request);
2166 * Main purpose of LMV blocking ast is to remove split directory LMV
2167 * presentation object (struct lmv_object) attached to the lock being revoked.
2169 int lmv_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
2170 void *data, int flag)
2172 struct lustre_handle lockh;
2173 struct lmv_object *obj;
2178 case LDLM_CB_BLOCKING:
2179 ldlm_lock2handle(lock, &lockh);
2180 rc = ldlm_cli_cancel(&lockh);
2182 CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
2186 case LDLM_CB_CANCELING:
2188 * Time to drop cached attrs for split directory object
2190 obj = lock->l_ast_data;
2192 CDEBUG(D_INODE, "Cancel %s on "LPU64"/"LPU64
2193 ", master "DFID"\n",
2194 lock->l_resource->lr_name.name[3] == 1 ?
2195 "LOOKUP" : "UPDATE",
2196 lock->l_resource->lr_name.name[0],
2197 lock->l_resource->lr_name.name[1],
2198 PFID(&obj->lo_fid));
2199 lmv_object_put(obj);
2208 static void lmv_hash_adjust(__u64 *hash, __u64 hash_adj)
2212 val = le64_to_cpu(*hash);
2214 val += MAX_HASH_SIZE;
2215 if (val != DIR_END_OFF)
2216 *hash = cpu_to_le64(val - hash_adj);
2219 static __u32 lmv_node_rank(struct obd_export *exp, const struct lu_fid *fid)
2222 struct obd_import *imp;
2225 * XXX: to get nid we assume that underlying obd device is mdc.
2227 imp = class_exp2cliimp(exp);
2228 id = imp->imp_connection->c_self + fid_flatten(fid);
2230 CDEBUG(D_INODE, "Readpage node rank: "LPX64" "DFID" "LPX64" "LPX64"\n",
2231 imp->imp_connection->c_self, PFID(fid), id, id ^ (id >> 32));
2233 return id ^ (id >> 32);
2236 static int lmv_readpage(struct obd_export *exp, const struct lu_fid *fid,
2237 struct obd_capa *oc, __u64 offset64, struct page *page,
2238 struct ptlrpc_request **request)
2240 struct obd_device *obd = exp->exp_obd;
2241 struct lmv_obd *lmv = &obd->u.lmv;
2242 struct lu_fid rid = *fid;
2243 struct lmv_object *obj;
2253 struct lmv_stripe *los;
2254 struct lmv_tgt_desc *tgt;
2255 struct lu_dirpage *dp;
2256 struct lu_dirent *ent;
2261 rc = lmv_check_connect(obd);
2265 CDEBUG(D_INODE, "READPAGE at "LPX64" from "DFID"\n", offset, PFID(&rid));
2268 * This case handle directory lookup in clustered metadata case (i.e.
2269 * split directory is located on multiple md servers.)
2270 * each server keeps directory entries for certain range of hashes.
2271 * E.g. we have N server and suppose hash range is 0 to MAX_HASH.
2272 * first server will keep records with hashes [ 0 ... MAX_HASH / N - 1],
2273 * second one with hashes [MAX_HASH / N ... 2 * MAX_HASH / N] and
2275 * readdir can simply start reading entries from 0 - N server in
2276 * order but that will not scale well as all client will request dir in
2277 * to server in same order.
2278 * Following algorithm does optimization:
2279 * Instead of doing readdir in 1, 2, ...., N order, client with a
2280 * rank R does readdir in R, R + 1, ..., N, 1, ... R - 1 order.
2281 * (every client has rank R)
2282 * But ll_readdir() expect offset range [0 to MAX_HASH/N) but
2283 * since client ask dir from MDS{R} client has pages with offsets
2284 * [R*MAX_HASH/N ... (R + 1)*MAX_HASH/N] there for we do hash_adj
2285 * on hash values that we get.
2287 obj = lmv_object_find_lock(obd, fid);
2289 nr = obj->lo_objcount;
2291 seg_size = MAX_HASH_SIZE;
2292 do_div(seg_size, nr);
2293 los = obj->lo_stripes;
2294 tgt = lmv_get_target(lmv, los[0].ls_mds);
2295 rank = lmv_node_rank(tgt->ltd_exp, fid) % nr;
2297 do_div(tgt_tmp, seg_size);
2298 tgt0_idx = do_div(tgt_tmp, nr);
2299 tgt_idx = (tgt0_idx + rank) % nr;
2301 if (tgt_idx < tgt0_idx)
2305 * Last segment has unusual length due to division
2308 hash_adj = MAX_HASH_SIZE - seg_size * nr;
2312 hash_adj += rank * seg_size;
2314 CDEBUG(D_INODE, "Readpage hash adjustment: %x "LPX64" "
2315 LPX64"/%x -> "LPX64"/%x\n", rank, hash_adj,
2316 offset, tgt0_idx, offset + hash_adj, tgt_idx);
2318 offset = (offset + hash_adj) & MAX_HASH_SIZE;
2319 rid = obj->lo_stripes[tgt_idx].ls_fid;
2320 tgt = lmv_get_target(lmv, los[tgt_idx].ls_mds);
2322 CDEBUG(D_INODE, "Forward to "DFID" with offset %lu i %d\n",
2323 PFID(&rid), (unsigned long)offset, tgt_idx);
2325 tgt = lmv_find_target(lmv, &rid);
2328 GOTO(cleanup, rc = PTR_ERR(tgt));
2330 rc = md_readpage(tgt->ltd_exp, &rid, oc, offset, page, request);
2334 dp = cfs_kmap(page);
2336 lmv_hash_adjust(&dp->ldp_hash_start, hash_adj);
2337 lmv_hash_adjust(&dp->ldp_hash_end, hash_adj);
2338 LASSERT(le64_to_cpu(dp->ldp_hash_start) <= offset64);
2340 for (ent = lu_dirent_start(dp); ent != NULL;
2341 ent = lu_dirent_next(ent))
2342 lmv_hash_adjust(&ent->lde_hash, hash_adj);
2344 if (tgt0_idx != nr - 1) {
2347 end = le64_to_cpu(dp->ldp_hash_end);
2348 if (end == DIR_END_OFF) {
2349 dp->ldp_hash_end = cpu_to_le32(seg_size *
2352 ""DFID" reset end "LPX64" tgt %d\n",
2354 le64_to_cpu(dp->ldp_hash_end), tgt_idx);
2362 lmv_object_put_unlock(obj);
2366 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2367 struct ptlrpc_request **request)
2369 struct obd_device *obd = exp->exp_obd;
2370 struct lmv_obd *lmv = &obd->u.lmv;
2371 struct lmv_tgt_desc *tgt = NULL;
2372 struct lmv_object *obj;
2378 rc = lmv_check_connect(obd);
2385 LASSERT(op_data->op_namelen != 0);
2387 obj = lmv_object_find(obd, &op_data->op_fid1);
2389 sidx = raw_name2idx(obj->lo_hashtype,
2392 op_data->op_namelen);
2393 op_data->op_bias &= ~MDS_CHECK_SPLIT;
2394 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2395 tgt = lmv_get_target(lmv,
2396 obj->lo_stripes[sidx].ls_mds);
2397 lmv_object_put(obj);
2398 CDEBUG(D_INODE, "UNLINK '%*s' in "DFID" -> %u\n",
2399 op_data->op_namelen, op_data->op_name,
2400 PFID(&op_data->op_fid1), sidx);
2404 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2406 RETURN(PTR_ERR(tgt));
2407 op_data->op_bias |= MDS_CHECK_SPLIT;
2410 op_data->op_fsuid = current->fsuid;
2411 op_data->op_fsgid = current->fsgid;
2412 op_data->op_cap = cfs_curproc_cap_pack();
2415 * If child's fid is given, cancel unused locks for it if it is from
2416 * another export than parent.
2418 * LOOKUP lock for child (fid3) should also be cancelled on parent
2419 * tgt_tgt in mdc_unlink().
2421 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2424 * Cancel FULL locks on child (fid3).
2426 rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2427 MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2430 rc = md_unlink(tgt->ltd_exp, op_data, request);
2432 if (rc == -ERESTART) {
2433 LASSERT(*request != NULL);
2434 DEBUG_REQ(D_WARNING|D_RPCTRACE, *request,
2435 "Got -ERESTART during unlink!\n");
2436 ptlrpc_req_finished(*request);
2440 * Directory got split. Time to update local object and repeat
2441 * the request with proper MDS.
2443 rc = lmv_handle_split(exp, &op_data->op_fid1);
2450 static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2455 case OBD_CLEANUP_EARLY:
2456 /* XXX: here should be calling obd_precleanup() down to
2459 case OBD_CLEANUP_EXPORTS:
2460 rc = obd_llog_finish(obd, 0);
2462 CERROR("failed to cleanup llogging subsystems\n");
2470 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
2471 void *key, __u32 *vallen, void *val,
2472 struct lov_stripe_md *lsm)
2474 struct obd_device *obd;
2475 struct lmv_obd *lmv;
2479 obd = class_exp2obd(exp);
2481 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2482 exp->exp_handle.h_cookie);
2487 if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2488 struct lmv_tgt_desc *tgts;
2491 rc = lmv_check_connect(obd);
2495 LASSERT(*vallen == sizeof(__u32));
2496 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count;
2500 * All tgts should be connected when this gets called.
2502 if (!tgts || !tgts->ltd_exp) {
2503 CERROR("target not setup?\n");
2507 if (!obd_get_info(tgts->ltd_exp, keylen, key,
2512 } else if (KEY_IS(KEY_MAX_EASIZE) || KEY_IS(KEY_CONN_DATA)) {
2513 rc = lmv_check_connect(obd);
2518 * Forwarding this request to first MDS, it should know LOV
2521 rc = obd_get_info(lmv->tgts[0].ltd_exp, keylen, key,
2523 if (!rc && KEY_IS(KEY_CONN_DATA)) {
2524 exp->exp_connect_flags =
2525 ((struct obd_connect_data *)val)->ocd_connect_flags;
2530 CDEBUG(D_IOCTL, "Invalid key\n");
2534 int lmv_set_info_async(struct obd_export *exp, obd_count keylen,
2535 void *key, obd_count vallen, void *val,
2536 struct ptlrpc_request_set *set)
2538 struct lmv_tgt_desc *tgt;
2539 struct obd_device *obd;
2540 struct lmv_obd *lmv;
2544 obd = class_exp2obd(exp);
2546 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2547 exp->exp_handle.h_cookie);
2552 if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX) ||
2553 KEY_IS(KEY_INIT_RECOV_BACKUP)) {
2556 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2557 tgt = &lmv->tgts[i];
2562 err = obd_set_info_async(tgt->ltd_exp,
2563 keylen, key, vallen, val, set);
2574 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
2575 struct lov_stripe_md *lsm)
2577 struct obd_device *obd = class_exp2obd(exp);
2578 struct lmv_obd *lmv = &obd->u.lmv;
2579 struct lmv_stripe_md *meap;
2580 struct lmv_stripe_md *lsmp;
2585 mea_size = lmv_get_easize(lmv);
2589 if (*lmmp && !lsm) {
2590 OBD_FREE(*lmmp, mea_size);
2595 if (*lmmp == NULL) {
2596 OBD_ALLOC(*lmmp, mea_size);
2604 lsmp = (struct lmv_stripe_md *)lsm;
2605 meap = (struct lmv_stripe_md *)*lmmp;
2607 if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
2608 lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
2611 meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
2612 meap->mea_count = cpu_to_le32(lsmp->mea_count);
2613 meap->mea_master = cpu_to_le32(lsmp->mea_master);
2615 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2616 meap->mea_ids[i] = meap->mea_ids[i];
2617 fid_cpu_to_le(&meap->mea_ids[i], &meap->mea_ids[i]);
2623 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
2624 struct lov_mds_md *lmm, int lmm_size)
2626 struct obd_device *obd = class_exp2obd(exp);
2627 struct lmv_stripe_md **tmea = (struct lmv_stripe_md **)lsmp;
2628 struct lmv_stripe_md *mea = (struct lmv_stripe_md *)lmm;
2629 struct lmv_obd *lmv = &obd->u.lmv;
2635 mea_size = lmv_get_easize(lmv);
2639 if (*lsmp != NULL && lmm == NULL) {
2640 OBD_FREE(*tmea, mea_size);
2645 LASSERT(mea_size == lmm_size);
2647 OBD_ALLOC(*tmea, mea_size);
2654 if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
2655 mea->mea_magic == MEA_MAGIC_ALL_CHARS ||
2656 mea->mea_magic == MEA_MAGIC_HASH_SEGMENT)
2658 magic = le32_to_cpu(mea->mea_magic);
2661 * Old mea is not handled here.
2663 CERROR("Old not supportable EA is found\n");
2667 (*tmea)->mea_magic = magic;
2668 (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
2669 (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
2671 for (i = 0; i < (*tmea)->mea_count; i++) {
2672 (*tmea)->mea_ids[i] = mea->mea_ids[i];
2673 fid_le_to_cpu(&(*tmea)->mea_ids[i], &(*tmea)->mea_ids[i]);
2678 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
2679 ldlm_policy_data_t *policy, ldlm_mode_t mode,
2680 int flags, void *opaque)
2682 struct obd_device *obd = exp->exp_obd;
2683 struct lmv_obd *lmv = &obd->u.lmv;
2689 LASSERT(fid != NULL);
2691 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2692 if (!lmv->tgts[i].ltd_exp || !lmv->tgts[i].ltd_active)
2695 err = md_cancel_unused(lmv->tgts[i].ltd_exp, fid,
2696 policy, mode, flags, opaque);
2703 int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data)
2705 struct obd_device *obd = exp->exp_obd;
2706 struct lmv_obd *lmv = &obd->u.lmv;
2709 rc = md_set_lock_data(lmv->tgts[0].ltd_exp, lockh, data);
2713 ldlm_mode_t lmv_lock_match(struct obd_export *exp, int flags,
2714 const struct lu_fid *fid, ldlm_type_t type,
2715 ldlm_policy_data_t *policy, ldlm_mode_t mode,
2716 struct lustre_handle *lockh)
2718 struct obd_device *obd = exp->exp_obd;
2719 struct lmv_obd *lmv = &obd->u.lmv;
2724 CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
2727 * With CMD every object can have two locks in different namespaces:
2728 * lookup lock in space of mds storing direntry and update/open lock in
2729 * space of mds storing inode. Thus we check all targets, not only that
2730 * one fid was created in.
2732 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2733 rc = md_lock_match(lmv->tgts[i].ltd_exp, flags, fid,
2734 type, policy, mode, lockh);
2742 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
2743 struct obd_export *dt_exp, struct obd_export *md_exp,
2744 struct lustre_md *md)
2746 struct obd_device *obd = exp->exp_obd;
2747 struct lmv_obd *lmv = &obd->u.lmv;
2750 rc = md_get_lustre_md(lmv->tgts[0].ltd_exp, req, dt_exp, md_exp, md);
2754 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
2756 struct obd_device *obd = exp->exp_obd;
2757 struct lmv_obd *lmv = &obd->u.lmv;
2761 obd_free_memmd(exp, (void *)&md->mea);
2762 RETURN(md_free_lustre_md(lmv->tgts[0].ltd_exp, md));
2765 int lmv_set_open_replay_data(struct obd_export *exp,
2766 struct obd_client_handle *och,
2767 struct ptlrpc_request *open_req)
2769 struct obd_device *obd = exp->exp_obd;
2770 struct lmv_obd *lmv = &obd->u.lmv;
2771 struct lmv_tgt_desc *tgt;
2774 tgt = lmv_find_target(lmv, &och->och_fid);
2776 RETURN(PTR_ERR(tgt));
2778 RETURN(md_set_open_replay_data(tgt->ltd_exp, och, open_req));
2781 int lmv_clear_open_replay_data(struct obd_export *exp,
2782 struct obd_client_handle *och)
2784 struct obd_device *obd = exp->exp_obd;
2785 struct lmv_obd *lmv = &obd->u.lmv;
2786 struct lmv_tgt_desc *tgt;
2789 tgt = lmv_find_target(lmv, &och->och_fid);
2791 RETURN(PTR_ERR(tgt));
2793 RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
2796 static int lmv_get_remote_perm(struct obd_export *exp,
2797 const struct lu_fid *fid,
2798 struct obd_capa *oc, __u32 suppgid,
2799 struct ptlrpc_request **request)
2801 struct obd_device *obd = exp->exp_obd;
2802 struct lmv_obd *lmv = &obd->u.lmv;
2803 struct lmv_tgt_desc *tgt;
2807 rc = lmv_check_connect(obd);
2811 tgt = lmv_find_target(lmv, fid);
2813 RETURN(PTR_ERR(tgt));
2815 rc = md_get_remote_perm(tgt->ltd_exp, fid, oc, suppgid, request);
2819 static int lmv_renew_capa(struct obd_export *exp, struct obd_capa *oc,
2822 struct obd_device *obd = exp->exp_obd;
2823 struct lmv_obd *lmv = &obd->u.lmv;
2824 struct lmv_tgt_desc *tgt;
2828 rc = lmv_check_connect(obd);
2832 tgt = lmv_find_target(lmv, &oc->c_capa.lc_fid);
2834 RETURN(PTR_ERR(tgt));
2836 rc = md_renew_capa(tgt->ltd_exp, oc, cb);
2840 int lmv_intent_getattr_async(struct obd_export *exp,
2841 struct md_enqueue_info *minfo,
2842 struct ldlm_enqueue_info *einfo)
2844 struct md_op_data *op_data = &minfo->mi_data;
2845 struct obd_device *obd = exp->exp_obd;
2846 struct lmv_obd *lmv = &obd->u.lmv;
2847 struct lmv_object *obj;
2848 struct lmv_tgt_desc *tgt;
2853 rc = lmv_check_connect(obd);
2857 if (!fid_is_sane(&op_data->op_fid2)) {
2858 obj = lmv_object_find(obd, &op_data->op_fid1);
2859 if (obj && op_data->op_namelen) {
2860 sidx = raw_name2idx(obj->lo_hashtype,
2862 (char *)op_data->op_name,
2863 op_data->op_namelen);
2864 op_data->op_fid1 = obj->lo_stripes[sidx].ls_fid;
2865 tgt = lmv_get_target(lmv,
2866 obj->lo_stripes[sidx].ls_mds);
2868 "Choose slave dir ("DFID") -> mds #%d\n",
2869 PFID(&op_data->op_fid1), tgt->ltd_idx);
2871 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2874 lmv_object_put(obj);
2876 op_data->op_fid1 = op_data->op_fid2;
2877 tgt = lmv_find_target(lmv, &op_data->op_fid2);
2878 op_data->op_bias = MDS_CROSS_REF;
2880 * Unfortunately, we have to lie to MDC/MDS to retrieve
2881 * attributes llite needs.
2883 if (minfo->mi_it.it_op & IT_LOOKUP)
2884 minfo->mi_it.it_op = IT_GETATTR;
2888 RETURN(PTR_ERR(tgt));
2890 rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
2894 int lmv_revalidate_lock(struct obd_export *exp,
2895 struct lookup_intent *it,
2898 struct obd_device *obd = exp->exp_obd;
2899 struct lmv_obd *lmv = &obd->u.lmv;
2900 struct lmv_tgt_desc *tgt;
2904 rc = lmv_check_connect(obd);
2908 tgt = lmv_find_target(lmv, fid);
2910 RETURN(PTR_ERR(tgt));
2912 rc = md_revalidate_lock(tgt->ltd_exp, it, fid);
2917 struct obd_ops lmv_obd_ops = {
2918 .o_owner = THIS_MODULE,
2919 .o_setup = lmv_setup,
2920 .o_cleanup = lmv_cleanup,
2921 .o_precleanup = lmv_precleanup,
2922 .o_process_config = lmv_process_config,
2923 .o_connect = lmv_connect,
2924 .o_disconnect = lmv_disconnect,
2925 .o_statfs = lmv_statfs,
2926 .o_get_info = lmv_get_info,
2927 .o_set_info_async = lmv_set_info_async,
2928 .o_packmd = lmv_packmd,
2929 .o_unpackmd = lmv_unpackmd,
2930 .o_notify = lmv_notify,
2931 .o_get_uuid = lmv_get_uuid,
2932 .o_iocontrol = lmv_iocontrol,
2933 .o_fid_delete = lmv_fid_delete
2936 struct md_ops lmv_md_ops = {
2937 .m_getstatus = lmv_getstatus,
2938 .m_change_cbdata = lmv_change_cbdata,
2939 .m_close = lmv_close,
2940 .m_create = lmv_create,
2941 .m_done_writing = lmv_done_writing,
2942 .m_enqueue = lmv_enqueue,
2943 .m_getattr = lmv_getattr,
2944 .m_getxattr = lmv_getxattr,
2945 .m_getattr_name = lmv_getattr_name,
2946 .m_intent_lock = lmv_intent_lock,
2948 .m_rename = lmv_rename,
2949 .m_setattr = lmv_setattr,
2950 .m_setxattr = lmv_setxattr,
2952 .m_readpage = lmv_readpage,
2953 .m_unlink = lmv_unlink,
2954 .m_init_ea_size = lmv_init_ea_size,
2955 .m_cancel_unused = lmv_cancel_unused,
2956 .m_set_lock_data = lmv_set_lock_data,
2957 .m_lock_match = lmv_lock_match,
2958 .m_get_lustre_md = lmv_get_lustre_md,
2959 .m_free_lustre_md = lmv_free_lustre_md,
2960 .m_set_open_replay_data = lmv_set_open_replay_data,
2961 .m_clear_open_replay_data = lmv_clear_open_replay_data,
2962 .m_renew_capa = lmv_renew_capa,
2963 .m_get_remote_perm = lmv_get_remote_perm,
2964 .m_intent_getattr_async = lmv_intent_getattr_async,
2965 .m_revalidate_lock = lmv_revalidate_lock
2968 int __init lmv_init(void)
2970 struct lprocfs_static_vars lvars;
2973 lmv_object_cache = cfs_mem_cache_create("lmv_objects",
2974 sizeof(struct lmv_object),
2976 if (!lmv_object_cache) {
2977 CERROR("Error allocating lmv objects cache\n");
2981 lprocfs_lmv_init_vars(&lvars);
2982 rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
2983 lvars.module_vars, LUSTRE_LMV_NAME, NULL);
2985 cfs_mem_cache_destroy(lmv_object_cache);
2991 static void lmv_exit(void)
2993 class_unregister_type(LUSTRE_LMV_NAME);
2995 LASSERTF(atomic_read(&lmv_object_count) == 0,
2996 "Can't free lmv objects cache, %d object(s) busy\n",
2997 atomic_read(&lmv_object_count));
2998 cfs_mem_cache_destroy(lmv_object_cache);
3001 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3002 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
3003 MODULE_LICENSE("GPL");
3005 module_init(lmv_init);
3006 module_exit(lmv_exit);