4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LMV
39 #include <linux/slab.h>
40 #include <linux/module.h>
41 #include <linux/init.h>
42 #include <linux/slab.h>
43 #include <linux/pagemap.h>
45 #include <linux/math64.h>
46 #include <linux/seq_file.h>
47 #include <linux/namei.h>
49 #include <liblustre.h>
52 #include <lustre/lustre_idl.h>
53 #include <obd_support.h>
54 #include <lustre_lib.h>
55 #include <lustre_net.h>
56 #include <obd_class.h>
57 #include <lustre_lmv.h>
58 #include <lprocfs_status.h>
59 #include <cl_object.h>
61 #include <lustre_lite.h>
62 #include <lustre_fid.h>
63 #include <lustre_ioctl.h>
64 #include "lmv_internal.h"
66 /* This hash is only for testing purpose */
67 static inline unsigned int
68 lmv_hash_all_chars(unsigned int count, const char *name, int namelen)
71 const unsigned char *p = (const unsigned char *)name;
73 while (--namelen >= 0)
81 static inline unsigned int
82 lmv_hash_fnv1a(unsigned int count, const char *name, int namelen)
86 hash = lustre_hash_fnv_1a_64(name, namelen);
93 int lmv_name_to_stripe_index(__u32 lmv_hash_type, unsigned int stripe_count,
94 const char *name, int namelen)
97 __u32 hash_type = lmv_hash_type & LMV_HASH_TYPE_MASK;
100 if (stripe_count <= 1)
103 /* for migrating object, always start from 0 stripe */
104 if (lmv_hash_type & LMV_HASH_FLAG_MIGRATION)
108 case LMV_HASH_TYPE_ALL_CHARS:
109 idx = lmv_hash_all_chars(stripe_count, name, namelen);
111 case LMV_HASH_TYPE_FNV_1A_64:
112 idx = lmv_hash_fnv1a(stripe_count, name, namelen);
119 CDEBUG(D_INFO, "name %.*s hash_type %d idx %d\n", namelen, name,
125 static void lmv_activate_target(struct lmv_obd *lmv,
126 struct lmv_tgt_desc *tgt,
129 if (tgt->ltd_active == activate)
132 tgt->ltd_active = activate;
133 lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
139 * -EINVAL : UUID can't be found in the LMV's target list
140 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
141 * -EBADF : The UUID is found, but the OBD of the wrong type (!)
143 static int lmv_set_mdc_active(struct lmv_obd *lmv,
144 const struct obd_uuid *uuid,
147 struct lmv_tgt_desc *tgt = NULL;
148 struct obd_device *obd;
153 CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
154 lmv, uuid->uuid, activate);
156 spin_lock(&lmv->lmv_lock);
157 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
159 if (tgt == NULL || tgt->ltd_exp == NULL)
162 CDEBUG(D_INFO, "Target idx %d is %s conn "LPX64"\n", i,
163 tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
165 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
169 if (i == lmv->desc.ld_tgt_count)
170 GOTO(out_lmv_lock, rc = -EINVAL);
172 obd = class_exp2obd(tgt->ltd_exp);
174 GOTO(out_lmv_lock, rc = -ENOTCONN);
176 CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
177 obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
178 obd->obd_type->typ_name, i);
179 LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
181 if (tgt->ltd_active == activate) {
182 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
183 activate ? "" : "in");
184 GOTO(out_lmv_lock, rc);
187 CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
188 activate ? "" : "in");
189 lmv_activate_target(lmv, tgt, activate);
193 spin_unlock(&lmv->lmv_lock);
197 struct obd_uuid *lmv_get_uuid(struct obd_export *exp)
199 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
200 struct lmv_tgt_desc *tgt = lmv->tgts[0];
202 return (tgt == NULL) ? NULL : obd_get_uuid(tgt->ltd_exp);
205 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
206 enum obd_notify_event ev, void *data)
208 struct obd_connect_data *conn_data;
209 struct lmv_obd *lmv = &obd->u.lmv;
210 struct obd_uuid *uuid;
214 if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
215 CERROR("unexpected notification of %s %s!\n",
216 watched->obd_type->typ_name,
221 uuid = &watched->u.cli.cl_target_uuid;
222 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
224 * Set MDC as active before notifying the observer, so the
225 * observer can use the MDC normally.
227 rc = lmv_set_mdc_active(lmv, uuid,
228 ev == OBD_NOTIFY_ACTIVE);
230 CERROR("%sactivation of %s failed: %d\n",
231 ev == OBD_NOTIFY_ACTIVE ? "" : "de",
235 } else if (ev == OBD_NOTIFY_OCD) {
236 conn_data = &watched->u.cli.cl_import->imp_connect_data;
238 * XXX: Make sure that ocd_connect_flags from all targets are
239 * the same. Otherwise one of MDTs runs wrong version or
240 * something like this. --umka
242 obd->obd_self_export->exp_connect_data = *conn_data;
245 else if (ev == OBD_NOTIFY_DISCON) {
247 * For disconnect event, flush fld cache for failout MDS case.
249 fld_client_flush(&lmv->lmv_fld);
253 * Pass the notification up the chain.
255 if (obd->obd_observer)
256 rc = obd_notify(obd->obd_observer, watched, ev, data);
262 * This is fake connect function. Its purpose is to initialize lmv and say
263 * caller that everything is okay. Real connection will be performed later.
265 static int lmv_connect(const struct lu_env *env,
266 struct obd_export **exp, struct obd_device *obd,
267 struct obd_uuid *cluuid, struct obd_connect_data *data,
270 struct lmv_obd *lmv = &obd->u.lmv;
271 struct lustre_handle conn = { 0 };
276 * We don't want to actually do the underlying connections more than
277 * once, so keep track.
280 if (lmv->refcount > 1) {
285 rc = class_connect(&conn, obd, cluuid);
287 CERROR("class_connection() returned %d\n", rc);
291 *exp = class_conn2export(&conn);
292 class_export_get(*exp);
296 lmv->cluuid = *cluuid;
299 lmv->conn_data = *data;
301 if (lmv->targets_proc_entry == NULL) {
302 lmv->targets_proc_entry = lprocfs_seq_register("target_obds",
305 if (IS_ERR(lmv->targets_proc_entry)) {
306 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
307 obd->obd_type->typ_name, obd->obd_name);
308 lmv->targets_proc_entry = NULL;
313 * All real clients should perform actual connection right away, because
314 * it is possible, that LMV will not have opportunity to connect targets
315 * and MDC stuff will be called directly, for instance while reading
316 * ../mdc/../kbytesfree procfs file, etc.
318 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_REAL))
319 rc = lmv_check_connect(obd);
321 if (rc && lmv->targets_proc_entry != NULL)
322 lprocfs_remove(&lmv->targets_proc_entry);
326 static void lmv_set_timeouts(struct obd_device *obd)
332 if (lmv->server_timeout == 0)
335 if (lmv->connected == 0)
338 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
339 struct lmv_tgt_desc *tgt = lmv->tgts[i];
341 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
344 obd_set_info_async(NULL, tgt->ltd_exp, sizeof(KEY_INTERMDS),
345 KEY_INTERMDS, 0, NULL, NULL);
349 static int lmv_init_ea_size(struct obd_export *exp, int easize,
350 int def_easize, int cookiesize, int def_cookiesize)
352 struct obd_device *obd = exp->exp_obd;
353 struct lmv_obd *lmv = &obd->u.lmv;
359 if (lmv->max_easize < easize) {
360 lmv->max_easize = easize;
363 if (lmv->max_def_easize < def_easize) {
364 lmv->max_def_easize = def_easize;
367 if (lmv->max_cookiesize < cookiesize) {
368 lmv->max_cookiesize = cookiesize;
371 if (lmv->max_def_cookiesize < def_cookiesize) {
372 lmv->max_def_cookiesize = def_cookiesize;
378 if (lmv->connected == 0)
381 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
382 struct lmv_tgt_desc *tgt = lmv->tgts[i];
384 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active) {
385 CWARN("%s: NULL export for %d\n", obd->obd_name, i);
389 rc = md_init_ea_size(tgt->ltd_exp, easize, def_easize,
390 cookiesize, def_cookiesize);
392 CERROR("%s: obd_init_ea_size() failed on MDT target %d:"
393 " rc = %d.\n", obd->obd_name, i, rc);
400 #define MAX_STRING_SIZE 128
402 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
404 struct lmv_obd *lmv = &obd->u.lmv;
405 struct obd_uuid *cluuid = &lmv->cluuid;
406 struct obd_uuid lmv_mdc_uuid = { "LMV_MDC_UUID" };
407 struct obd_device *mdc_obd;
408 struct obd_export *mdc_exp;
409 struct lu_fld_target target;
413 mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
416 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
420 CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
421 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
422 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
425 if (!mdc_obd->obd_set_up) {
426 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
430 rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
431 &lmv->conn_data, NULL);
433 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
438 * Init fid sequence client for this mdc and add new fld target.
440 rc = obd_fid_init(mdc_obd, mdc_exp, LUSTRE_SEQ_METADATA);
444 target.ft_srv = NULL;
445 target.ft_exp = mdc_exp;
446 target.ft_idx = tgt->ltd_idx;
448 fld_client_add_target(&lmv->lmv_fld, &target);
450 rc = obd_register_observer(mdc_obd, obd);
452 obd_disconnect(mdc_exp);
453 CERROR("target %s register_observer error %d\n",
454 tgt->ltd_uuid.uuid, rc);
458 if (obd->obd_observer) {
460 * Tell the observer about the new target.
462 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
464 (void *)(tgt - lmv->tgts[0]));
466 obd_disconnect(mdc_exp);
472 tgt->ltd_exp = mdc_exp;
473 lmv->desc.ld_active_tgt_count++;
475 md_init_ea_size(tgt->ltd_exp, lmv->max_easize, lmv->max_def_easize,
476 lmv->max_cookiesize, lmv->max_def_cookiesize);
478 CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
479 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
480 atomic_read(&obd->obd_refcount));
482 if (lmv->targets_proc_entry != NULL) {
483 struct proc_dir_entry *mdc_symlink;
485 LASSERT(mdc_obd->obd_type != NULL);
486 LASSERT(mdc_obd->obd_type->typ_name != NULL);
487 mdc_symlink = lprocfs_add_symlink(mdc_obd->obd_name,
488 lmv->targets_proc_entry,
490 mdc_obd->obd_type->typ_name,
492 if (mdc_symlink == NULL) {
493 CERROR("Could not register LMV target "
494 "/proc/fs/lustre/%s/%s/target_obds/%s.",
495 obd->obd_type->typ_name, obd->obd_name,
502 static void lmv_del_target(struct lmv_obd *lmv, int index)
504 if (lmv->tgts[index] == NULL)
507 OBD_FREE_PTR(lmv->tgts[index]);
508 lmv->tgts[index] = NULL;
512 static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
513 __u32 index, int gen)
515 struct lmv_obd *lmv = &obd->u.lmv;
516 struct lmv_tgt_desc *tgt;
517 int orig_tgt_count = 0;
521 CDEBUG(D_CONFIG, "Target uuid: %s. index %d\n", uuidp->uuid, index);
525 if (lmv->desc.ld_tgt_count == 0) {
526 struct obd_device *mdc_obd;
528 mdc_obd = class_find_client_obd(uuidp, LUSTRE_MDC_NAME,
531 lmv_init_unlock(lmv);
532 CERROR("%s: Target %s not attached: rc = %d\n",
533 obd->obd_name, uuidp->uuid, -EINVAL);
538 if ((index < lmv->tgts_size) && (lmv->tgts[index] != NULL)) {
539 tgt = lmv->tgts[index];
540 CERROR("%s: UUID %s already assigned at LOV target index %d:"
541 " rc = %d\n", obd->obd_name,
542 obd_uuid2str(&tgt->ltd_uuid), index, -EEXIST);
543 lmv_init_unlock(lmv);
547 if (index >= lmv->tgts_size) {
548 /* We need to reallocate the lmv target array. */
549 struct lmv_tgt_desc **newtgts, **old = NULL;
553 while (newsize < index + 1)
554 newsize = newsize << 1;
555 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
556 if (newtgts == NULL) {
557 lmv_init_unlock(lmv);
561 if (lmv->tgts_size) {
562 memcpy(newtgts, lmv->tgts,
563 sizeof(*newtgts) * lmv->tgts_size);
565 oldsize = lmv->tgts_size;
569 lmv->tgts_size = newsize;
572 OBD_FREE(old, sizeof(*old) * oldsize);
574 CDEBUG(D_CONFIG, "tgts: %p size: %d\n", lmv->tgts,
580 lmv_init_unlock(lmv);
584 mutex_init(&tgt->ltd_fid_mutex);
585 tgt->ltd_idx = index;
586 tgt->ltd_uuid = *uuidp;
588 lmv->tgts[index] = tgt;
589 if (index >= lmv->desc.ld_tgt_count) {
590 orig_tgt_count = lmv->desc.ld_tgt_count;
591 lmv->desc.ld_tgt_count = index + 1;
594 if (lmv->connected) {
595 rc = lmv_connect_mdc(obd, tgt);
597 spin_lock(&lmv->lmv_lock);
598 if (lmv->desc.ld_tgt_count == index + 1)
599 lmv->desc.ld_tgt_count = orig_tgt_count;
600 memset(tgt, 0, sizeof(*tgt));
601 spin_unlock(&lmv->lmv_lock);
603 int easize = sizeof(struct lmv_stripe_md) +
604 lmv->desc.ld_tgt_count * sizeof(struct lu_fid);
605 lmv_init_ea_size(obd->obd_self_export, easize, 0, 0, 0);
609 lmv_init_unlock(lmv);
613 int lmv_check_connect(struct obd_device *obd)
615 struct lmv_obd *lmv = &obd->u.lmv;
616 struct lmv_tgt_desc *tgt;
626 if (lmv->connected) {
627 lmv_init_unlock(lmv);
631 if (lmv->desc.ld_tgt_count == 0) {
632 lmv_init_unlock(lmv);
633 CERROR("%s: no targets configured.\n", obd->obd_name);
637 LASSERT(lmv->tgts != NULL);
639 if (lmv->tgts[0] == NULL) {
640 lmv_init_unlock(lmv);
641 CERROR("%s: no target configured for index 0.\n",
646 CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
647 lmv->cluuid.uuid, obd->obd_name);
649 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
653 rc = lmv_connect_mdc(obd, tgt);
658 lmv_set_timeouts(obd);
659 class_export_put(lmv->exp);
661 easize = lmv_mds_md_size(lmv->desc.ld_tgt_count, LMV_MAGIC);
662 lmv_init_ea_size(obd->obd_self_export, easize, 0, 0, 0);
663 lmv_init_unlock(lmv);
674 --lmv->desc.ld_active_tgt_count;
675 rc2 = obd_disconnect(tgt->ltd_exp);
677 CERROR("LMV target %s disconnect on "
678 "MDC idx %d: error %d\n",
679 tgt->ltd_uuid.uuid, i, rc2);
683 class_disconnect(lmv->exp);
684 lmv_init_unlock(lmv);
688 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
690 struct lmv_obd *lmv = &obd->u.lmv;
691 struct obd_device *mdc_obd;
695 LASSERT(tgt != NULL);
696 LASSERT(obd != NULL);
698 mdc_obd = class_exp2obd(tgt->ltd_exp);
701 mdc_obd->obd_force = obd->obd_force;
702 mdc_obd->obd_fail = obd->obd_fail;
703 mdc_obd->obd_no_recov = obd->obd_no_recov;
706 if (lmv->targets_proc_entry != NULL)
707 lprocfs_remove_proc_entry(mdc_obd->obd_name,
708 lmv->targets_proc_entry);
710 rc = obd_fid_fini(tgt->ltd_exp->exp_obd);
712 CERROR("Can't finanize fids factory\n");
714 CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
715 tgt->ltd_exp->exp_obd->obd_name,
716 tgt->ltd_exp->exp_obd->obd_uuid.uuid);
718 obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
719 rc = obd_disconnect(tgt->ltd_exp);
721 if (tgt->ltd_active) {
722 CERROR("Target %s disconnect error %d\n",
723 tgt->ltd_uuid.uuid, rc);
727 lmv_activate_target(lmv, tgt, 0);
732 static int lmv_disconnect(struct obd_export *exp)
734 struct obd_device *obd = class_exp2obd(exp);
735 struct lmv_obd *lmv = &obd->u.lmv;
744 * Only disconnect the underlying layers on the final disconnect.
747 if (lmv->refcount != 0)
750 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
751 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
754 lmv_disconnect_mdc(obd, lmv->tgts[i]);
757 if (lmv->targets_proc_entry != NULL)
758 lprocfs_remove(&lmv->targets_proc_entry);
760 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
761 obd->obd_type->typ_name, obd->obd_name);
765 * This is the case when no real connection is established by
766 * lmv_check_connect().
769 class_export_put(exp);
770 rc = class_disconnect(exp);
771 if (lmv->refcount == 0)
776 static int lmv_fid2path(struct obd_export *exp, int len, void *karg, void *uarg)
778 struct obd_device *obddev = class_exp2obd(exp);
779 struct lmv_obd *lmv = &obddev->u.lmv;
780 struct getinfo_fid2path *gf;
781 struct lmv_tgt_desc *tgt;
782 struct getinfo_fid2path *remote_gf = NULL;
783 int remote_gf_size = 0;
786 gf = (struct getinfo_fid2path *)karg;
787 tgt = lmv_find_target(lmv, &gf->gf_fid);
789 RETURN(PTR_ERR(tgt));
792 rc = obd_iocontrol(OBD_IOC_FID2PATH, tgt->ltd_exp, len, gf, uarg);
793 if (rc != 0 && rc != -EREMOTE)
794 GOTO(out_fid2path, rc);
796 /* If remote_gf != NULL, it means just building the
797 * path on the remote MDT, copy this path segement to gf */
798 if (remote_gf != NULL) {
799 struct getinfo_fid2path *ori_gf;
802 ori_gf = (struct getinfo_fid2path *)karg;
803 if (strlen(ori_gf->gf_path) +
804 strlen(gf->gf_path) > ori_gf->gf_pathlen)
805 GOTO(out_fid2path, rc = -EOVERFLOW);
807 ptr = ori_gf->gf_path;
809 memmove(ptr + strlen(gf->gf_path) + 1, ptr,
810 strlen(ori_gf->gf_path));
812 strncpy(ptr, gf->gf_path, strlen(gf->gf_path));
813 ptr += strlen(gf->gf_path);
817 CDEBUG(D_INFO, "%s: get path %s "DFID" rec: "LPU64" ln: %u\n",
818 tgt->ltd_exp->exp_obd->obd_name,
819 gf->gf_path, PFID(&gf->gf_fid), gf->gf_recno,
823 GOTO(out_fid2path, rc);
825 /* sigh, has to go to another MDT to do path building further */
826 if (remote_gf == NULL) {
827 remote_gf_size = sizeof(*remote_gf) + PATH_MAX;
828 OBD_ALLOC(remote_gf, remote_gf_size);
829 if (remote_gf == NULL)
830 GOTO(out_fid2path, rc = -ENOMEM);
831 remote_gf->gf_pathlen = PATH_MAX;
834 if (!fid_is_sane(&gf->gf_fid)) {
835 CERROR("%s: invalid FID "DFID": rc = %d\n",
836 tgt->ltd_exp->exp_obd->obd_name,
837 PFID(&gf->gf_fid), -EINVAL);
838 GOTO(out_fid2path, rc = -EINVAL);
841 tgt = lmv_find_target(lmv, &gf->gf_fid);
843 GOTO(out_fid2path, rc = -EINVAL);
845 remote_gf->gf_fid = gf->gf_fid;
846 remote_gf->gf_recno = -1;
847 remote_gf->gf_linkno = -1;
848 memset(remote_gf->gf_path, 0, remote_gf->gf_pathlen);
850 goto repeat_fid2path;
853 if (remote_gf != NULL)
854 OBD_FREE(remote_gf, remote_gf_size);
858 static int lmv_hsm_req_count(struct lmv_obd *lmv,
859 const struct hsm_user_request *hur,
860 const struct lmv_tgt_desc *tgt_mds)
864 struct lmv_tgt_desc *curr_tgt;
866 /* count how many requests must be sent to the given target */
867 for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
868 curr_tgt = lmv_find_target(lmv, &hur->hur_user_item[i].hui_fid);
869 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid))
875 static void lmv_hsm_req_build(struct lmv_obd *lmv,
876 struct hsm_user_request *hur_in,
877 const struct lmv_tgt_desc *tgt_mds,
878 struct hsm_user_request *hur_out)
881 struct lmv_tgt_desc *curr_tgt;
883 /* build the hsm_user_request for the given target */
884 hur_out->hur_request = hur_in->hur_request;
886 for (i = 0; i < hur_in->hur_request.hr_itemcount; i++) {
887 curr_tgt = lmv_find_target(lmv,
888 &hur_in->hur_user_item[i].hui_fid);
889 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid)) {
890 hur_out->hur_user_item[nr_out] =
891 hur_in->hur_user_item[i];
895 hur_out->hur_request.hr_itemcount = nr_out;
896 memcpy(hur_data(hur_out), hur_data(hur_in),
897 hur_in->hur_request.hr_data_len);
900 static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len,
901 struct lustre_kernelcomm *lk, void *uarg)
905 struct kkuc_ct_data *kcd = NULL;
908 /* unregister request (call from llapi_hsm_copytool_fini) */
909 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
910 struct lmv_tgt_desc *tgt = lmv->tgts[i];
912 if (tgt == NULL || tgt->ltd_exp == NULL)
914 /* best effort: try to clean as much as possible
915 * (continue on error) */
916 obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
919 /* Whatever the result, remove copytool from kuc groups.
920 * Unreached coordinators will get EPIPE on next requests
921 * and will unregister automatically.
923 rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group, (void **)&kcd);
930 static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len,
931 struct lustre_kernelcomm *lk, void *uarg)
936 bool any_set = false;
937 struct kkuc_ct_data *kcd;
940 /* All or nothing: try to register to all MDS.
941 * In case of failure, unregister from previous MDS,
942 * except if it because of inactive target. */
943 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
944 struct lmv_tgt_desc *tgt = lmv->tgts[i];
946 if (tgt == NULL || tgt->ltd_exp == NULL)
948 err = obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
950 if (tgt->ltd_active) {
951 /* permanent error */
952 CERROR("%s: iocontrol MDC %s on MDT"
953 " idx %d cmd %x: err = %d\n",
954 class_exp2obd(lmv->exp)->obd_name,
955 tgt->ltd_uuid.uuid, i, cmd, err);
957 lk->lk_flags |= LK_FLG_STOP;
958 /* unregister from previous MDS */
959 for (j = 0; j < i; j++) {
961 if (tgt == NULL || tgt->ltd_exp == NULL)
963 obd_iocontrol(cmd, tgt->ltd_exp, len,
968 /* else: transient error.
969 * kuc will register to the missing MDT
977 /* no registration done: return error */
980 /* at least one registration done, with no failure */
981 filp = fget(lk->lk_wfd);
990 kcd->kcd_magic = KKUC_CT_DATA_MAGIC;
991 kcd->kcd_uuid = lmv->cluuid;
992 kcd->kcd_archive = lk->lk_data;
994 rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group, kcd);
1007 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
1008 int len, void *karg, void *uarg)
1010 struct obd_device *obddev = class_exp2obd(exp);
1011 struct lmv_obd *lmv = &obddev->u.lmv;
1012 struct lmv_tgt_desc *tgt = NULL;
1016 __u32 count = lmv->desc.ld_tgt_count;
1023 case IOC_OBD_STATFS: {
1024 struct obd_ioctl_data *data = karg;
1025 struct obd_device *mdc_obd;
1026 struct obd_statfs stat_buf = {0};
1029 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
1030 if ((index >= count))
1033 tgt = lmv->tgts[index];
1034 if (tgt == NULL || !tgt->ltd_active)
1037 mdc_obd = class_exp2obd(tgt->ltd_exp);
1042 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
1043 min((int) data->ioc_plen2,
1044 (int) sizeof(struct obd_uuid))))
1047 rc = obd_statfs(NULL, tgt->ltd_exp, &stat_buf,
1048 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1052 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1053 min((int) data->ioc_plen1,
1054 (int) sizeof(stat_buf))))
1058 case OBD_IOC_QUOTACTL: {
1059 struct if_quotactl *qctl = karg;
1060 struct obd_quotactl *oqctl;
1062 if (qctl->qc_valid == QC_MDTIDX) {
1063 if (count <= qctl->qc_idx)
1066 tgt = lmv->tgts[qctl->qc_idx];
1067 if (tgt == NULL || tgt->ltd_exp == NULL)
1069 } else if (qctl->qc_valid == QC_UUID) {
1070 for (i = 0; i < count; i++) {
1074 if (!obd_uuid_equals(&tgt->ltd_uuid,
1078 if (tgt->ltd_exp == NULL)
1090 LASSERT(tgt != NULL && tgt->ltd_exp != NULL);
1091 OBD_ALLOC_PTR(oqctl);
1095 QCTL_COPY(oqctl, qctl);
1096 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1098 QCTL_COPY(qctl, oqctl);
1099 qctl->qc_valid = QC_MDTIDX;
1100 qctl->obd_uuid = tgt->ltd_uuid;
1102 OBD_FREE_PTR(oqctl);
1105 case OBD_IOC_CHANGELOG_SEND:
1106 case OBD_IOC_CHANGELOG_CLEAR: {
1107 struct ioc_changelog *icc = karg;
1109 if (icc->icc_mdtindex >= count)
1112 tgt = lmv->tgts[icc->icc_mdtindex];
1113 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
1115 rc = obd_iocontrol(cmd, tgt->ltd_exp, sizeof(*icc), icc, NULL);
1118 case LL_IOC_GET_CONNECT_FLAGS: {
1120 if (tgt == NULL || tgt->ltd_exp == NULL)
1122 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1125 case OBD_IOC_FID2PATH: {
1126 rc = lmv_fid2path(exp, len, karg, uarg);
1129 case LL_IOC_HSM_STATE_GET:
1130 case LL_IOC_HSM_STATE_SET:
1131 case LL_IOC_HSM_ACTION: {
1132 struct md_op_data *op_data = karg;
1134 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1136 RETURN(PTR_ERR(tgt));
1138 if (tgt->ltd_exp == NULL)
1141 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1144 case LL_IOC_HSM_PROGRESS: {
1145 const struct hsm_progress_kernel *hpk = karg;
1147 tgt = lmv_find_target(lmv, &hpk->hpk_fid);
1149 RETURN(PTR_ERR(tgt));
1150 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1153 case LL_IOC_HSM_REQUEST: {
1154 struct hsm_user_request *hur = karg;
1155 unsigned int reqcount = hur->hur_request.hr_itemcount;
1160 /* if the request is about a single fid
1161 * or if there is a single MDS, no need to split
1163 if (reqcount == 1 || count == 1) {
1164 tgt = lmv_find_target(lmv,
1165 &hur->hur_user_item[0].hui_fid);
1167 RETURN(PTR_ERR(tgt));
1168 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1170 /* split fid list to their respective MDS */
1171 for (i = 0; i < count; i++) {
1172 unsigned int nr, reqlen;
1174 struct hsm_user_request *req;
1177 if (tgt == NULL || tgt->ltd_exp == NULL)
1180 nr = lmv_hsm_req_count(lmv, hur, tgt);
1181 if (nr == 0) /* nothing for this MDS */
1184 /* build a request with fids for this MDS */
1185 reqlen = offsetof(typeof(*hur),
1187 + hur->hur_request.hr_data_len;
1188 OBD_ALLOC_LARGE(req, reqlen);
1192 lmv_hsm_req_build(lmv, hur, tgt, req);
1194 rc1 = obd_iocontrol(cmd, tgt->ltd_exp, reqlen,
1196 if (rc1 != 0 && rc == 0)
1198 OBD_FREE_LARGE(req, reqlen);
1203 case LL_IOC_LOV_SWAP_LAYOUTS: {
1204 struct md_op_data *op_data = karg;
1205 struct lmv_tgt_desc *tgt1, *tgt2;
1207 tgt1 = lmv_find_target(lmv, &op_data->op_fid1);
1209 RETURN(PTR_ERR(tgt1));
1211 tgt2 = lmv_find_target(lmv, &op_data->op_fid2);
1213 RETURN(PTR_ERR(tgt2));
1215 if ((tgt1->ltd_exp == NULL) || (tgt2->ltd_exp == NULL))
1218 /* only files on same MDT can have their layouts swapped */
1219 if (tgt1->ltd_idx != tgt2->ltd_idx)
1222 rc = obd_iocontrol(cmd, tgt1->ltd_exp, len, karg, uarg);
1225 case LL_IOC_HSM_CT_START: {
1226 struct lustre_kernelcomm *lk = karg;
1227 if (lk->lk_flags & LK_FLG_STOP)
1228 rc = lmv_hsm_ct_unregister(lmv, cmd, len, lk, uarg);
1230 rc = lmv_hsm_ct_register(lmv, cmd, len, lk, uarg);
1234 for (i = 0; i < count; i++) {
1235 struct obd_device *mdc_obd;
1239 if (tgt == NULL || tgt->ltd_exp == NULL)
1241 /* ll_umount_begin() sets force flag but for lmv, not
1242 * mdc. Let's pass it through */
1243 mdc_obd = class_exp2obd(tgt->ltd_exp);
1244 mdc_obd->obd_force = obddev->obd_force;
1245 err = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1246 if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
1249 if (tgt->ltd_active) {
1250 CERROR("error: iocontrol MDC %s on MDT"
1251 " idx %d cmd %x: err = %d\n",
1252 tgt->ltd_uuid.uuid, i, cmd, err);
1266 static int lmv_all_chars_policy(int count, const char *name,
1277 static int lmv_nid_policy(struct lmv_obd *lmv)
1279 struct obd_import *imp;
1283 * XXX: To get nid we assume that underlying obd device is mdc.
1285 imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
1286 id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
1287 return id % lmv->desc.ld_tgt_count;
1290 static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1291 placement_policy_t placement)
1293 switch (placement) {
1294 case PLACEMENT_CHAR_POLICY:
1295 return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
1297 op_data->op_namelen);
1298 case PLACEMENT_NID_POLICY:
1299 return lmv_nid_policy(lmv);
1305 CERROR("Unsupported placement policy %x\n", placement);
1311 * This is _inode_ placement policy function (not name).
1313 static int lmv_placement_policy(struct obd_device *obd,
1314 struct md_op_data *op_data,
1317 struct lmv_obd *lmv = &obd->u.lmv;
1320 LASSERT(mds != NULL);
1322 if (lmv->desc.ld_tgt_count == 1) {
1328 * If stripe_offset is provided during setdirstripe
1329 * (setdirstripe -i xx), xx MDS will be choosen.
1331 if (op_data->op_cli_flags & CLI_SET_MEA && op_data->op_data != NULL) {
1332 struct lmv_user_md *lum;
1334 lum = op_data->op_data;
1336 if (le32_to_cpu(lum->lum_stripe_offset) != (__u32)-1) {
1337 *mds = le32_to_cpu(lum->lum_stripe_offset);
1339 /* -1 means default, which will be in the same MDT with
1341 *mds = op_data->op_mds;
1342 lum->lum_stripe_offset = cpu_to_le32(op_data->op_mds);
1345 /* Allocate new fid on target according to operation type and
1346 * parent home mds. */
1347 *mds = op_data->op_mds;
1353 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid,
1356 struct lmv_tgt_desc *tgt;
1360 tgt = lmv_get_target(lmv, mds, NULL);
1362 RETURN(PTR_ERR(tgt));
1365 * New seq alloc and FLD setup should be atomic. Otherwise we may find
1366 * on server that seq in new allocated fid is not yet known.
1368 mutex_lock(&tgt->ltd_fid_mutex);
1370 if (tgt->ltd_active == 0 || tgt->ltd_exp == NULL)
1371 GOTO(out, rc = -ENODEV);
1374 * Asking underlying tgt layer to allocate new fid.
1376 rc = obd_fid_alloc(NULL, tgt->ltd_exp, fid, NULL);
1378 LASSERT(fid_is_sane(fid));
1384 mutex_unlock(&tgt->ltd_fid_mutex);
1388 int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
1389 struct lu_fid *fid, struct md_op_data *op_data)
1391 struct obd_device *obd = class_exp2obd(exp);
1392 struct lmv_obd *lmv = &obd->u.lmv;
1397 LASSERT(op_data != NULL);
1398 LASSERT(fid != NULL);
1400 rc = lmv_placement_policy(obd, op_data, &mds);
1402 CERROR("Can't get target for allocating fid, "
1407 rc = __lmv_fid_alloc(lmv, fid, mds);
1409 CERROR("Can't alloc new fid, rc %d\n", rc);
1416 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1418 struct lmv_obd *lmv = &obd->u.lmv;
1419 struct lmv_desc *desc;
1423 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1424 CERROR("LMV setup requires a descriptor\n");
1428 desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1429 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1430 CERROR("Lmv descriptor size wrong: %d > %d\n",
1431 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1435 OBD_ALLOC(lmv->tgts, sizeof(*lmv->tgts) * 32);
1436 if (lmv->tgts == NULL)
1438 lmv->tgts_size = 32;
1440 obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1441 lmv->desc.ld_tgt_count = 0;
1442 lmv->desc.ld_active_tgt_count = 0;
1443 lmv->max_cookiesize = 0;
1444 lmv->max_def_easize = 0;
1445 lmv->max_easize = 0;
1446 lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
1448 spin_lock_init(&lmv->lmv_lock);
1449 mutex_init(&lmv->init_mutex);
1452 obd->obd_vars = lprocfs_lmv_obd_vars;
1453 lprocfs_seq_obd_setup(obd);
1454 lprocfs_alloc_md_stats(obd, 0);
1455 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
1456 0444, &lmv_proc_target_fops, obd);
1458 CWARN("%s: error adding LMV target_obd file: rc = %d\n",
1461 rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1462 LUSTRE_CLI_FLD_HASH_DHT);
1464 CERROR("Can't init FLD, err %d\n", rc);
1474 static int lmv_cleanup(struct obd_device *obd)
1476 struct lmv_obd *lmv = &obd->u.lmv;
1479 fld_client_fini(&lmv->lmv_fld);
1480 if (lmv->tgts != NULL) {
1482 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1483 if (lmv->tgts[i] == NULL)
1485 lmv_del_target(lmv, i);
1487 OBD_FREE(lmv->tgts, sizeof(*lmv->tgts) * lmv->tgts_size);
1493 static int lmv_process_config(struct obd_device *obd, obd_count len, void *buf)
1495 struct lustre_cfg *lcfg = buf;
1496 struct obd_uuid obd_uuid;
1502 switch (lcfg->lcfg_command) {
1504 /* modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID
1505 * 2:0 3:1 4:lustre-MDT0000-mdc_UUID */
1506 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
1507 GOTO(out, rc = -EINVAL);
1509 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
1511 if (sscanf(lustre_cfg_buf(lcfg, 2), "%u", &index) != 1)
1512 GOTO(out, rc = -EINVAL);
1513 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
1514 GOTO(out, rc = -EINVAL);
1515 rc = lmv_add_target(obd, &obd_uuid, index, gen);
1518 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1519 GOTO(out, rc = -EINVAL);
1525 static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
1526 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1528 struct obd_device *obd = class_exp2obd(exp);
1529 struct lmv_obd *lmv = &obd->u.lmv;
1530 struct obd_statfs *temp;
1535 rc = lmv_check_connect(obd);
1539 OBD_ALLOC(temp, sizeof(*temp));
1543 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1544 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1547 rc = obd_statfs(env, lmv->tgts[i]->ltd_exp, temp,
1550 CERROR("can't stat MDS #%d (%s), error %d\n", i,
1551 lmv->tgts[i]->ltd_exp->exp_obd->obd_name,
1553 GOTO(out_free_temp, rc);
1558 /* If the statfs is from mount, it will needs
1559 * retrieve necessary information from MDT0.
1560 * i.e. mount does not need the merged osfs
1562 * And also clients can be mounted as long as
1563 * MDT0 is in service*/
1564 if (flags & OBD_STATFS_FOR_MDT0)
1565 GOTO(out_free_temp, rc);
1567 osfs->os_bavail += temp->os_bavail;
1568 osfs->os_blocks += temp->os_blocks;
1569 osfs->os_ffree += temp->os_ffree;
1570 osfs->os_files += temp->os_files;
1576 OBD_FREE(temp, sizeof(*temp));
1580 static int lmv_getstatus(struct obd_export *exp,
1582 struct obd_capa **pc)
1584 struct obd_device *obd = exp->exp_obd;
1585 struct lmv_obd *lmv = &obd->u.lmv;
1589 rc = lmv_check_connect(obd);
1593 rc = md_getstatus(lmv->tgts[0]->ltd_exp, fid, pc);
1597 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1598 struct obd_capa *oc, obd_valid valid, const char *name,
1599 const char *input, int input_size, int output_size,
1600 int flags, struct ptlrpc_request **request)
1602 struct obd_device *obd = exp->exp_obd;
1603 struct lmv_obd *lmv = &obd->u.lmv;
1604 struct lmv_tgt_desc *tgt;
1608 rc = lmv_check_connect(obd);
1612 tgt = lmv_find_target(lmv, fid);
1614 RETURN(PTR_ERR(tgt));
1616 rc = md_getxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1617 input_size, output_size, flags, request);
1622 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1623 struct obd_capa *oc, obd_valid valid, const char *name,
1624 const char *input, int input_size, int output_size,
1625 int flags, __u32 suppgid,
1626 struct ptlrpc_request **request)
1628 struct obd_device *obd = exp->exp_obd;
1629 struct lmv_obd *lmv = &obd->u.lmv;
1630 struct lmv_tgt_desc *tgt;
1634 rc = lmv_check_connect(obd);
1638 tgt = lmv_find_target(lmv, fid);
1640 RETURN(PTR_ERR(tgt));
1642 rc = md_setxattr(tgt->ltd_exp, fid, oc, valid, name, input,
1643 input_size, output_size, flags, suppgid,
1649 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1650 struct ptlrpc_request **request)
1652 struct obd_device *obd = exp->exp_obd;
1653 struct lmv_obd *lmv = &obd->u.lmv;
1654 struct lmv_tgt_desc *tgt;
1658 rc = lmv_check_connect(obd);
1662 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1664 RETURN(PTR_ERR(tgt));
1666 if (op_data->op_flags & MF_GET_MDT_IDX) {
1667 op_data->op_mds = tgt->ltd_idx;
1671 rc = md_getattr(tgt->ltd_exp, op_data, request);
1676 static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
1678 struct obd_device *obd = exp->exp_obd;
1679 struct lmv_obd *lmv = &obd->u.lmv;
1684 rc = lmv_check_connect(obd);
1688 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1691 * With DNE every object can have two locks in different namespaces:
1692 * lookup lock in space of MDT storing direntry and update/open lock in
1693 * space of MDT storing inode.
1695 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1696 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1698 md_null_inode(lmv->tgts[i]->ltd_exp, fid);
1704 static int lmv_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1705 ldlm_iterator_t it, void *data)
1707 struct obd_device *obd = exp->exp_obd;
1708 struct lmv_obd *lmv = &obd->u.lmv;
1714 rc = lmv_check_connect(obd);
1718 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1721 * With DNE every object can have two locks in different namespaces:
1722 * lookup lock in space of MDT storing direntry and update/open lock in
1723 * space of MDT storing inode. Try the MDT that the FID maps to first,
1724 * since this can be easily found, and only try others if that fails.
1726 for (i = 0, tgt = lmv_find_target_index(lmv, fid);
1727 i < lmv->desc.ld_tgt_count;
1728 i++, tgt = (tgt + 1) % lmv->desc.ld_tgt_count) {
1730 CDEBUG(D_HA, "%s: "DFID" is inaccessible: rc = %d\n",
1731 obd->obd_name, PFID(fid), tgt);
1735 if (lmv->tgts[tgt] == NULL ||
1736 lmv->tgts[tgt]->ltd_exp == NULL)
1739 rc = md_find_cbdata(lmv->tgts[tgt]->ltd_exp, fid, it, data);
1748 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1749 struct md_open_data *mod, struct ptlrpc_request **request)
1751 struct obd_device *obd = exp->exp_obd;
1752 struct lmv_obd *lmv = &obd->u.lmv;
1753 struct lmv_tgt_desc *tgt;
1757 rc = lmv_check_connect(obd);
1761 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1763 RETURN(PTR_ERR(tgt));
1765 CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1766 rc = md_close(tgt->ltd_exp, op_data, mod, request);
1771 * Choosing the MDT by name or FID in @op_data.
1772 * For non-striped directory, it will locate MDT by fid.
1773 * For striped-directory, it will locate MDT by name. And also
1774 * it will reset op_fid1 with the FID of the choosen stripe.
1776 struct lmv_tgt_desc *
1777 lmv_locate_target_for_name(struct lmv_obd *lmv, struct lmv_stripe_md *lsm,
1778 const char *name, int namelen, struct lu_fid *fid,
1781 struct lmv_tgt_desc *tgt;
1782 const struct lmv_oinfo *oinfo;
1784 oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
1786 RETURN(ERR_CAST(oinfo));
1787 *fid = oinfo->lmo_fid;
1788 *mds = oinfo->lmo_mds;
1789 tgt = lmv_get_target(lmv, *mds, NULL);
1791 CDEBUG(D_INFO, "locate on mds %u "DFID"\n", *mds, PFID(fid));
1796 * Locate mds by fid or name
1798 * For striped directory (lsm != NULL), it will locate the stripe
1799 * by name hash (see lsm_name_to_stripe_info()). Note: if the hash_type
1800 * is unknown, it will return -EBADFD, and lmv_intent_lookup might need
1801 * walk through all of stripes to locate the entry.
1803 * For normal direcotry, it will locate MDS by FID directly.
1804 * \param[in] lmv LMV device
1805 * \param[in] op_data client MD stack parameters, name, namelen
1807 * \param[in] fid object FID used to locate MDS.
1809 * retval pointer to the lmv_tgt_desc if succeed.
1810 * ERR_PTR(errno) if failed.
1813 *lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1816 struct lmv_stripe_md *lsm = op_data->op_mea1;
1817 struct lmv_tgt_desc *tgt;
1819 if (lsm == NULL || op_data->op_namelen == 0) {
1820 tgt = lmv_find_target(lmv, fid);
1824 op_data->op_mds = tgt->ltd_idx;
1828 return lmv_locate_target_for_name(lmv, lsm, op_data->op_name,
1829 op_data->op_namelen, fid,
1833 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1834 const void *data, int datalen, int mode, __u32 uid,
1835 __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1836 struct ptlrpc_request **request)
1838 struct obd_device *obd = exp->exp_obd;
1839 struct lmv_obd *lmv = &obd->u.lmv;
1840 struct lmv_tgt_desc *tgt;
1844 rc = lmv_check_connect(obd);
1848 if (!lmv->desc.ld_active_tgt_count)
1851 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1853 RETURN(PTR_ERR(tgt));
1855 CDEBUG(D_INODE, "CREATE name '%.*s' on "DFID" -> mds #%x\n",
1856 op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1859 rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
1863 /* Send the create request to the MDT where the object
1864 * will be located */
1865 tgt = lmv_find_target(lmv, &op_data->op_fid2);
1867 RETURN(PTR_ERR(tgt));
1869 op_data->op_mds = tgt->ltd_idx;
1871 CDEBUG(D_INODE, "CREATE obj "DFID" -> mds #%x\n",
1872 PFID(&op_data->op_fid2), op_data->op_mds);
1874 op_data->op_flags |= MF_MDC_CANCEL_FID1;
1875 rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1876 cap_effective, rdev, request);
1878 if (*request == NULL)
1880 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1885 static int lmv_done_writing(struct obd_export *exp,
1886 struct md_op_data *op_data,
1887 struct md_open_data *mod)
1889 struct obd_device *obd = exp->exp_obd;
1890 struct lmv_obd *lmv = &obd->u.lmv;
1891 struct lmv_tgt_desc *tgt;
1895 rc = lmv_check_connect(obd);
1899 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1901 RETURN(PTR_ERR(tgt));
1903 rc = md_done_writing(tgt->ltd_exp, op_data, mod);
1908 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1909 const union ldlm_policy_data *policy,
1910 struct lookup_intent *it, struct md_op_data *op_data,
1911 struct lustre_handle *lockh, __u64 extra_lock_flags)
1913 struct obd_device *obd = exp->exp_obd;
1914 struct lmv_obd *lmv = &obd->u.lmv;
1915 struct lmv_tgt_desc *tgt;
1919 rc = lmv_check_connect(obd);
1923 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
1924 LL_IT2STR(it), PFID(&op_data->op_fid1));
1926 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1928 RETURN(PTR_ERR(tgt));
1930 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%d\n",
1931 LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
1933 rc = md_enqueue(tgt->ltd_exp, einfo, policy, it, op_data, lockh,
1940 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1941 struct ptlrpc_request **preq)
1943 struct ptlrpc_request *req = NULL;
1944 struct obd_device *obd = exp->exp_obd;
1945 struct lmv_obd *lmv = &obd->u.lmv;
1946 struct lmv_tgt_desc *tgt;
1947 struct mdt_body *body;
1951 rc = lmv_check_connect(obd);
1955 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1957 RETURN(PTR_ERR(tgt));
1959 CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" -> mds #%d\n",
1960 op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1963 rc = md_getattr_name(tgt->ltd_exp, op_data, preq);
1967 body = req_capsule_server_get(&(*preq)->rq_pill, &RMF_MDT_BODY);
1968 LASSERT(body != NULL);
1970 if (body->mbo_valid & OBD_MD_MDS) {
1971 struct lu_fid rid = body->mbo_fid1;
1972 CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1975 tgt = lmv_find_target(lmv, &rid);
1977 ptlrpc_req_finished(*preq);
1979 RETURN(PTR_ERR(tgt));
1982 op_data->op_fid1 = rid;
1983 op_data->op_valid |= OBD_MD_FLCROSSREF;
1984 op_data->op_namelen = 0;
1985 op_data->op_name = NULL;
1986 rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
1987 ptlrpc_req_finished(*preq);
1994 #define md_op_data_fid(op_data, fl) \
1995 (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1996 fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1997 fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1998 fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
2001 static int lmv_early_cancel(struct obd_export *exp, struct lmv_tgt_desc *tgt,
2002 struct md_op_data *op_data,
2003 int op_tgt, ldlm_mode_t mode, int bits, int flag)
2005 struct lu_fid *fid = md_op_data_fid(op_data, flag);
2006 struct obd_device *obd = exp->exp_obd;
2007 struct lmv_obd *lmv = &obd->u.lmv;
2008 ldlm_policy_data_t policy = {{ 0 }};
2012 if (!fid_is_sane(fid))
2016 tgt = lmv_find_target(lmv, fid);
2018 RETURN(PTR_ERR(tgt));
2021 if (tgt->ltd_idx != op_tgt) {
2022 CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
2023 policy.l_inodebits.bits = bits;
2024 rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
2025 mode, LCF_ASYNC, NULL);
2028 "EARLY_CANCEL skip operation target %d on "DFID"\n",
2030 op_data->op_flags |= flag;
2038 * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
2041 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
2042 struct ptlrpc_request **request)
2044 struct obd_device *obd = exp->exp_obd;
2045 struct lmv_obd *lmv = &obd->u.lmv;
2046 struct lmv_tgt_desc *tgt;
2050 rc = lmv_check_connect(obd);
2054 LASSERT(op_data->op_namelen != 0);
2056 CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
2057 PFID(&op_data->op_fid2), op_data->op_namelen,
2058 op_data->op_name, PFID(&op_data->op_fid1));
2060 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2061 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2062 op_data->op_cap = cfs_curproc_cap_pack();
2063 if (op_data->op_mea2 != NULL) {
2064 struct lmv_stripe_md *lsm = op_data->op_mea2;
2065 const struct lmv_oinfo *oinfo;
2067 oinfo = lsm_name_to_stripe_info(lsm, op_data->op_name,
2068 op_data->op_namelen);
2070 RETURN(PTR_ERR(oinfo));
2072 op_data->op_fid2 = oinfo->lmo_fid;
2075 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
2077 RETURN(PTR_ERR(tgt));
2080 * Cancel UPDATE lock on child (fid1).
2082 op_data->op_flags |= MF_MDC_CANCEL_FID2;
2083 rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_idx, LCK_EX,
2084 MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2088 rc = md_link(tgt->ltd_exp, op_data, request);
2093 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
2094 const char *old, int oldlen, const char *new, int newlen,
2095 struct ptlrpc_request **request)
2097 struct obd_device *obd = exp->exp_obd;
2098 struct lmv_obd *lmv = &obd->u.lmv;
2099 struct lmv_tgt_desc *src_tgt;
2103 LASSERT(oldlen != 0);
2105 CDEBUG(D_INODE, "RENAME %.*s in "DFID":%d to %.*s in "DFID":%d\n",
2106 oldlen, old, PFID(&op_data->op_fid1),
2107 op_data->op_mea1 ? op_data->op_mea1->lsm_md_stripe_count : 0,
2108 newlen, new, PFID(&op_data->op_fid2),
2109 op_data->op_mea2 ? op_data->op_mea2->lsm_md_stripe_count : 0);
2111 rc = lmv_check_connect(obd);
2115 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2116 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2117 op_data->op_cap = cfs_curproc_cap_pack();
2118 if (op_data->op_cli_flags & CLI_MIGRATE) {
2119 LASSERTF(fid_is_sane(&op_data->op_fid3), "invalid FID "DFID"\n",
2120 PFID(&op_data->op_fid3));
2121 rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
2124 src_tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid3);
2126 if (op_data->op_mea1 != NULL) {
2127 struct lmv_stripe_md *lsm = op_data->op_mea1;
2129 src_tgt = lmv_locate_target_for_name(lmv, lsm, old,
2133 if (IS_ERR(src_tgt))
2134 RETURN(PTR_ERR(src_tgt));
2136 src_tgt = lmv_find_target(lmv, &op_data->op_fid1);
2137 if (IS_ERR(src_tgt))
2138 RETURN(PTR_ERR(src_tgt));
2140 op_data->op_mds = src_tgt->ltd_idx;
2143 if (op_data->op_mea2) {
2144 struct lmv_stripe_md *lsm = op_data->op_mea2;
2145 const struct lmv_oinfo *oinfo;
2147 oinfo = lsm_name_to_stripe_info(lsm, new, newlen);
2149 RETURN(PTR_ERR(oinfo));
2151 op_data->op_fid2 = oinfo->lmo_fid;
2154 if (IS_ERR(src_tgt))
2155 RETURN(PTR_ERR(src_tgt));
2158 * LOOKUP lock on src child (fid3) should also be cancelled for
2159 * src_tgt in mdc_rename.
2161 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2164 * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
2167 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
2168 LCK_EX, MDS_INODELOCK_UPDATE,
2169 MF_MDC_CANCEL_FID2);
2174 * Cancel LOOKUP locks on source child (fid3) for parent tgt_tgt.
2176 if (fid_is_sane(&op_data->op_fid3)) {
2177 struct lmv_tgt_desc *tgt;
2179 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2181 RETURN(PTR_ERR(tgt));
2183 /* Cancel LOOKUP lock on its parent */
2184 rc = lmv_early_cancel(exp, tgt, op_data, src_tgt->ltd_idx,
2185 LCK_EX, MDS_INODELOCK_LOOKUP,
2186 MF_MDC_CANCEL_FID3);
2190 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
2191 LCK_EX, MDS_INODELOCK_FULL,
2192 MF_MDC_CANCEL_FID3);
2198 * Cancel all the locks on tgt child (fid4).
2200 if (fid_is_sane(&op_data->op_fid4))
2201 rc = lmv_early_cancel(exp, NULL, op_data, src_tgt->ltd_idx,
2202 LCK_EX, MDS_INODELOCK_FULL,
2203 MF_MDC_CANCEL_FID4);
2205 CDEBUG(D_INODE, DFID":m%d to "DFID"\n", PFID(&op_data->op_fid1),
2206 op_data->op_mds, PFID(&op_data->op_fid2));
2208 rc = md_rename(src_tgt->ltd_exp, op_data, old, oldlen, new, newlen,
2214 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2215 void *ea, int ealen, void *ea2, int ea2len,
2216 struct ptlrpc_request **request,
2217 struct md_open_data **mod)
2219 struct obd_device *obd = exp->exp_obd;
2220 struct lmv_obd *lmv = &obd->u.lmv;
2221 struct lmv_tgt_desc *tgt;
2225 rc = lmv_check_connect(obd);
2229 CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x\n",
2230 PFID(&op_data->op_fid1), op_data->op_attr.ia_valid);
2232 op_data->op_flags |= MF_MDC_CANCEL_FID1;
2233 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2235 RETURN(PTR_ERR(tgt));
2237 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, ea2,
2238 ea2len, request, mod);
2243 static int lmv_fsync(struct obd_export *exp, const struct lu_fid *fid,
2244 struct obd_capa *oc, struct ptlrpc_request **request)
2246 struct obd_device *obd = exp->exp_obd;
2247 struct lmv_obd *lmv = &obd->u.lmv;
2248 struct lmv_tgt_desc *tgt;
2252 rc = lmv_check_connect(obd);
2256 tgt = lmv_find_target(lmv, fid);
2258 RETURN(PTR_ERR(tgt));
2260 rc = md_fsync(tgt->ltd_exp, fid, oc, request);
2265 * Adjust a set of pages, each page containing an array of lu_dirpages,
2266 * so that each page can be used as a single logical lu_dirpage.
2268 * A lu_dirpage is laid out as follows, where s = ldp_hash_start,
2269 * e = ldp_hash_end, f = ldp_flags, p = padding, and each "ent" is a
2270 * struct lu_dirent. It has size up to LU_PAGE_SIZE. The ldp_hash_end
2271 * value is used as a cookie to request the next lu_dirpage in a
2272 * directory listing that spans multiple pages (two in this example):
2275 * .|--------v------- -----.
2276 * |s|e|f|p|ent|ent| ... |ent|
2277 * '--|-------------- -----' Each CFS_PAGE contains a single
2278 * '------. lu_dirpage.
2279 * .---------v------- -----.
2280 * |s|e|f|p|ent| 0 | ... | 0 |
2281 * '----------------- -----'
2283 * However, on hosts where the native VM page size (PAGE_CACHE_SIZE) is
2284 * larger than LU_PAGE_SIZE, a single host page may contain multiple
2285 * lu_dirpages. After reading the lu_dirpages from the MDS, the
2286 * ldp_hash_end of the first lu_dirpage refers to the one immediately
2287 * after it in the same CFS_PAGE (arrows simplified for brevity, but
2288 * in general e0==s1, e1==s2, etc.):
2290 * .-------------------- -----.
2291 * |s0|e0|f0|p|ent|ent| ... |ent|
2292 * |---v---------------- -----|
2293 * |s1|e1|f1|p|ent|ent| ... |ent|
2294 * |---v---------------- -----| Here, each CFS_PAGE contains
2295 * ... multiple lu_dirpages.
2296 * |---v---------------- -----|
2297 * |s'|e'|f'|p|ent|ent| ... |ent|
2298 * '---|---------------- -----'
2300 * .----------------------------.
2303 * This structure is transformed into a single logical lu_dirpage as follows:
2305 * - Replace e0 with e' so the request for the next lu_dirpage gets the page
2306 * labeled 'next CFS_PAGE'.
2308 * - Copy the LDF_COLLIDE flag from f' to f0 to correctly reflect whether
2309 * a hash collision with the next page exists.
2311 * - Adjust the lde_reclen of the ending entry of each lu_dirpage to span
2312 * to the first entry of the next lu_dirpage.
2314 #if PAGE_CACHE_SIZE > LU_PAGE_SIZE
2315 static void lmv_adjust_dirpages(struct page **pages, int ncfspgs, int nlupgs)
2319 for (i = 0; i < ncfspgs; i++) {
2320 struct lu_dirpage *dp = kmap(pages[i]);
2321 struct lu_dirpage *first = dp;
2322 struct lu_dirent *end_dirent = NULL;
2323 struct lu_dirent *ent;
2324 __u64 hash_end = dp->ldp_hash_end;
2325 __u32 flags = dp->ldp_flags;
2327 while (--nlupgs > 0) {
2328 ent = lu_dirent_start(dp);
2329 for (end_dirent = ent; ent != NULL;
2330 end_dirent = ent, ent = lu_dirent_next(ent));
2332 /* Advance dp to next lu_dirpage. */
2333 dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
2335 /* Check if we've reached the end of the CFS_PAGE. */
2336 if (!((unsigned long)dp & ~CFS_PAGE_MASK))
2339 /* Save the hash and flags of this lu_dirpage. */
2340 hash_end = dp->ldp_hash_end;
2341 flags = dp->ldp_flags;
2343 /* Check if lu_dirpage contains no entries. */
2347 /* Enlarge the end entry lde_reclen from 0 to
2348 * first entry of next lu_dirpage. */
2349 LASSERT(le16_to_cpu(end_dirent->lde_reclen) == 0);
2350 end_dirent->lde_reclen =
2351 cpu_to_le16((char *)(dp->ldp_entries) -
2352 (char *)end_dirent);
2355 first->ldp_hash_end = hash_end;
2356 first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
2357 first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
2361 LASSERTF(nlupgs == 0, "left = %d", nlupgs);
2364 #define lmv_adjust_dirpages(pages, ncfspgs, nlupgs) do {} while (0)
2365 #endif /* PAGE_CACHE_SIZE > LU_PAGE_SIZE */
2368 * Get current minimum entry from striped directory
2370 * This function will search the dir entry, whose hash value is the
2371 * closest(>=) to @hash_offset, from all of sub-stripes, and it is
2372 * only being called for striped directory.
2374 * \param[in] exp export of LMV
2375 * \param[in] op_data parameters transferred beween client MD stack
2376 * stripe_information will be included in this
2378 * \param[in] cb_op ldlm callback being used in enqueue in
2380 * \param[in] hash_offset the hash value, which is used to locate
2381 * minum(closet) dir entry
2382 * \param[in|out] stripe_offset the caller use this to indicate the stripe
2383 * index of last entry, so to avoid hash conflict
2384 * between stripes. It will also be used to
2385 * return the stripe index of current dir entry.
2386 * \param[in|out] entp the minum entry and it also is being used
2387 * to input the last dir entry to resolve the
2390 * \param[out] ppage the page which holds the minum entry
2392 * \retval = 0 get the entry successfully
2393 * negative errno (< 0) does not get the entry
2395 static int lmv_get_min_striped_entry(struct obd_export *exp,
2396 struct md_op_data *op_data,
2397 struct md_callback *cb_op,
2398 __u64 hash_offset, int *stripe_offset,
2399 struct lu_dirent **entp,
2400 struct page **ppage)
2402 struct obd_device *obd = exp->exp_obd;
2403 struct lmv_obd *lmv = &obd->u.lmv;
2404 struct lmv_stripe_md *lsm = op_data->op_mea1;
2405 struct lmv_tgt_desc *tgt;
2407 struct lu_dirent *min_ent = NULL;
2408 struct page *min_page = NULL;
2414 stripe_count = lsm->lsm_md_stripe_count;
2415 for (i = 0; i < stripe_count; i++) {
2416 struct lu_dirent *ent = NULL;
2417 struct page *page = NULL;
2418 struct lu_dirpage *dp;
2419 __u64 stripe_hash = hash_offset;
2421 tgt = lmv_get_target(lmv, lsm->lsm_md_oinfo[i].lmo_mds, NULL);
2423 GOTO(out, rc = PTR_ERR(tgt));
2425 /* op_data will be shared by each stripe, so we need
2426 * reset these value for each stripe */
2427 op_data->op_stripe_offset = i;
2428 op_data->op_fid1 = lsm->lsm_md_oinfo[i].lmo_fid;
2429 op_data->op_fid2 = lsm->lsm_md_oinfo[i].lmo_fid;
2430 op_data->op_data = lsm->lsm_md_oinfo[i].lmo_root;
2432 rc = md_read_page(tgt->ltd_exp, op_data, cb_op, stripe_hash,
2437 dp = page_address(page);
2438 for (ent = lu_dirent_start(dp); ent != NULL;
2439 ent = lu_dirent_next(ent)) {
2440 /* Skip dummy entry */
2441 if (le16_to_cpu(ent->lde_namelen) == 0)
2444 if (le64_to_cpu(ent->lde_hash) < hash_offset)
2447 if (le64_to_cpu(ent->lde_hash) == hash_offset &&
2448 (*entp == ent || i < *stripe_offset))
2451 /* skip . and .. for other stripes */
2453 (strncmp(ent->lde_name, ".",
2454 le16_to_cpu(ent->lde_namelen)) == 0 ||
2455 strncmp(ent->lde_name, "..",
2456 le16_to_cpu(ent->lde_namelen)) == 0))
2462 stripe_hash = le64_to_cpu(dp->ldp_hash_end);
2465 page_cache_release(page);
2468 /* reach the end of current stripe, go to next stripe */
2469 if (stripe_hash == MDS_DIR_END_OFF)
2475 if (min_ent != NULL) {
2476 if (le64_to_cpu(min_ent->lde_hash) >
2477 le64_to_cpu(ent->lde_hash)) {
2480 page_cache_release(min_page);
2485 page_cache_release(page);
2496 if (*ppage != NULL) {
2498 page_cache_release(*ppage);
2500 *stripe_offset = min_idx;
2507 * Build dir entry page from a striped directory
2509 * This function gets one entry by @offset from a striped directory. It will
2510 * read entries from all of stripes, and choose one closest to the required
2511 * offset(&offset). A few notes
2512 * 1. skip . and .. for non-zero stripes, because there can only have one .
2513 * and .. in a directory.
2514 * 2. op_data will be shared by all of stripes, instead of allocating new
2515 * one, so need to restore before reusing.
2516 * 3. release the entry page if that is not being chosen.
2518 * \param[in] exp obd export refer to LMV
2519 * \param[in] op_data hold those MD parameters of read_entry
2520 * \param[in] cb_op ldlm callback being used in enqueue in mdc_read_entry
2521 * \param[out] ldp the entry being read
2522 * \param[out] ppage the page holding the entry. Note: because the entry
2523 * will be accessed in upper layer, so we need hold the
2524 * page until the usages of entry is finished, see
2525 * ll_dir_entry_next.
2527 * retval =0 if get entry successfully
2528 * <0 cannot get entry
2530 static int lmv_read_striped_page(struct obd_export *exp,
2531 struct md_op_data *op_data,
2532 struct md_callback *cb_op,
2533 __u64 offset, struct page **ppage)
2535 struct obd_device *obd = exp->exp_obd;
2536 struct lu_fid master_fid = op_data->op_fid1;
2537 struct inode *master_inode = op_data->op_data;
2538 __u64 hash_offset = offset;
2539 struct lu_dirpage *dp;
2540 struct page *min_ent_page = NULL;
2541 struct page *ent_page = NULL;
2542 struct lu_dirent *ent;
2545 struct lu_dirent *min_ent = NULL;
2546 struct lu_dirent *last_ent;
2551 rc = lmv_check_connect(obd);
2555 /* Allocate a page and read entries from all of stripes and fill
2556 * the page by hash order */
2557 ent_page = alloc_page(GFP_KERNEL);
2558 if (ent_page == NULL)
2561 /* Initialize the entry page */
2562 dp = kmap(ent_page);
2563 memset(dp, 0, sizeof(*dp));
2564 dp->ldp_hash_start = cpu_to_le64(offset);
2565 dp->ldp_flags |= LDF_COLLIDE;
2568 left_bytes = PAGE_CACHE_SIZE - sizeof(*dp);
2574 /* Find the minum entry from all sub-stripes */
2575 rc = lmv_get_min_striped_entry(exp, op_data, cb_op, hash_offset,
2581 /* If it can not get minum entry, it means it already reaches
2582 * the end of this directory */
2583 if (min_ent == NULL) {
2584 last_ent->lde_reclen = 0;
2585 hash_offset = MDS_DIR_END_OFF;
2589 ent_size = le16_to_cpu(min_ent->lde_reclen);
2591 /* the last entry lde_reclen is 0, but it might not
2592 * the end of this entry of this temporay entry */
2594 ent_size = lu_dirent_calc_size(
2595 le16_to_cpu(min_ent->lde_namelen),
2596 le32_to_cpu(min_ent->lde_attrs));
2597 if (ent_size > left_bytes) {
2598 last_ent->lde_reclen = cpu_to_le16(0);
2599 hash_offset = le64_to_cpu(min_ent->lde_hash);
2603 memcpy(ent, min_ent, ent_size);
2605 /* Replace . with master FID and Replace .. with the parent FID
2606 * of master object */
2607 if (strncmp(ent->lde_name, ".",
2608 le16_to_cpu(ent->lde_namelen)) == 0 &&
2609 le16_to_cpu(ent->lde_namelen) == 1)
2610 fid_cpu_to_le(&ent->lde_fid, &master_fid);
2611 else if (strncmp(ent->lde_name, "..",
2612 le16_to_cpu(ent->lde_namelen)) == 0 &&
2613 le16_to_cpu(ent->lde_namelen) == 2)
2614 fid_cpu_to_le(&ent->lde_fid, &op_data->op_fid3);
2616 left_bytes -= ent_size;
2617 ent->lde_reclen = cpu_to_le16(ent_size);
2619 ent = (void *)ent + ent_size;
2620 hash_offset = le64_to_cpu(min_ent->lde_hash);
2621 if (hash_offset == MDS_DIR_END_OFF) {
2622 last_ent->lde_reclen = 0;
2627 if (min_ent_page != NULL) {
2628 kunmap(min_ent_page);
2629 page_cache_release(min_ent_page);
2632 if (unlikely(rc != 0)) {
2633 __free_page(ent_page);
2637 dp->ldp_flags |= LDF_EMPTY;
2638 dp->ldp_flags = cpu_to_le32(dp->ldp_flags);
2639 dp->ldp_hash_end = cpu_to_le64(hash_offset);
2642 /* We do not want to allocate md_op_data during each
2643 * dir entry reading, so op_data will be shared by every stripe,
2644 * then we need to restore it back to original value before
2645 * return to the upper layer */
2646 op_data->op_fid1 = master_fid;
2647 op_data->op_fid2 = master_fid;
2648 op_data->op_data = master_inode;
2655 int lmv_read_page(struct obd_export *exp, struct md_op_data *op_data,
2656 struct md_callback *cb_op, __u64 offset,
2657 struct page **ppage)
2659 struct obd_device *obd = exp->exp_obd;
2660 struct lmv_obd *lmv = &obd->u.lmv;
2661 struct lmv_stripe_md *lsm = op_data->op_mea1;
2662 struct lmv_tgt_desc *tgt;
2666 rc = lmv_check_connect(obd);
2670 if (unlikely(lsm != NULL)) {
2671 rc = lmv_read_striped_page(exp, op_data, cb_op, offset, ppage);
2675 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2677 RETURN(PTR_ERR(tgt));
2679 rc = md_read_page(tgt->ltd_exp, op_data, cb_op, offset, ppage);
2685 * Unlink a file/directory
2687 * Unlink a file or directory under the parent dir. The unlink request
2688 * usually will be sent to the MDT where the child is located, but if
2689 * the client does not have the child FID then request will be sent to the
2690 * MDT where the parent is located.
2692 * If the parent is a striped directory then it also needs to locate which
2693 * stripe the name of the child is located, and replace the parent FID
2694 * (@op->op_fid1) with the stripe FID. Note: if the stripe is unknown,
2695 * it will walk through all of sub-stripes until the child is being
2698 * \param[in] exp export refer to LMV
2699 * \param[in] op_data different parameters transferred beween client
2700 * MD stacks, name, namelen, FIDs etc.
2701 * op_fid1 is the parent FID, op_fid2 is the child
2703 * \param[out] request point to the request of unlink.
2705 * retval 0 if succeed
2706 * negative errno if failed.
2708 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2709 struct ptlrpc_request **request)
2711 struct obd_device *obd = exp->exp_obd;
2712 struct lmv_obd *lmv = &obd->u.lmv;
2713 struct lmv_tgt_desc *tgt = NULL;
2714 struct lmv_tgt_desc *parent_tgt = NULL;
2715 struct mdt_body *body;
2717 int stripe_index = 0;
2718 struct lmv_stripe_md *lsm = op_data->op_mea1;
2721 rc = lmv_check_connect(obd);
2725 /* For striped dir, we need to locate the parent as well */
2727 struct lmv_tgt_desc *tmp;
2729 LASSERT(op_data->op_name != NULL &&
2730 op_data->op_namelen != 0);
2732 tmp = lmv_locate_target_for_name(lmv, lsm,
2734 op_data->op_namelen,
2738 /* return -EBADFD means unknown hash type, might
2739 * need try all sub-stripe here */
2740 if (IS_ERR(tmp) && PTR_ERR(tmp) != -EBADFD)
2741 RETURN(PTR_ERR(tmp));
2743 /* Note: both migrating dir and unknown hash dir need to
2744 * try all of sub-stripes, so we need start search the
2745 * name from stripe 0, but migrating dir is already handled
2746 * inside lmv_locate_target_for_name(), so we only check
2747 * unknown hash type directory here */
2748 if (!lmv_is_known_hash_type(lsm)) {
2749 struct lmv_oinfo *oinfo;
2751 oinfo = &lsm->lsm_md_oinfo[stripe_index];
2753 op_data->op_fid1 = oinfo->lmo_fid;
2754 op_data->op_mds = oinfo->lmo_mds;
2759 /* Send unlink requests to the MDT where the child is located */
2760 if (likely(!fid_is_zero(&op_data->op_fid2)))
2761 tgt = lmv_find_target(lmv, &op_data->op_fid2);
2762 else if (lsm != NULL)
2763 tgt = lmv_get_target(lmv, op_data->op_mds, NULL);
2765 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
2768 RETURN(PTR_ERR(tgt));
2770 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2771 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2772 op_data->op_cap = cfs_curproc_cap_pack();
2775 * If child's fid is given, cancel unused locks for it if it is from
2776 * another export than parent.
2778 * LOOKUP lock for child (fid3) should also be cancelled on parent
2779 * tgt_tgt in mdc_unlink().
2781 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2784 * Cancel FULL locks on child (fid3).
2786 parent_tgt = lmv_find_target(lmv, &op_data->op_fid1);
2787 if (IS_ERR(parent_tgt))
2788 RETURN(PTR_ERR(parent_tgt));
2790 if (parent_tgt != tgt) {
2791 rc = lmv_early_cancel(exp, parent_tgt, op_data, tgt->ltd_idx,
2792 LCK_EX, MDS_INODELOCK_LOOKUP,
2793 MF_MDC_CANCEL_FID3);
2796 rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_idx, LCK_EX,
2797 MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2801 CDEBUG(D_INODE, "unlink with fid="DFID"/"DFID" -> mds #%d\n",
2802 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2), tgt->ltd_idx);
2804 rc = md_unlink(tgt->ltd_exp, op_data, request);
2805 if (rc != 0 && rc != -EREMOTE && rc != -ENOENT)
2808 /* Try next stripe if it is needed. */
2809 if (rc == -ENOENT && lsm != NULL && lmv_need_try_all_stripes(lsm)) {
2810 struct lmv_oinfo *oinfo;
2813 if (stripe_index >= lsm->lsm_md_stripe_count)
2816 oinfo = &lsm->lsm_md_oinfo[stripe_index];
2818 op_data->op_fid1 = oinfo->lmo_fid;
2819 op_data->op_mds = oinfo->lmo_mds;
2821 ptlrpc_req_finished(*request);
2824 goto try_next_stripe;
2827 body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2831 /* Not cross-ref case, just get out of here. */
2832 if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2835 CDEBUG(D_INODE, "%s: try unlink to another MDT for "DFID"\n",
2836 exp->exp_obd->obd_name, PFID(&body->mbo_fid1));
2838 /* This is a remote object, try remote MDT, Note: it may
2839 * try more than 1 time here, Considering following case
2840 * /mnt/lustre is root on MDT0, remote1 is on MDT1
2841 * 1. Initially A does not know where remote1 is, it send
2842 * unlink RPC to MDT0, MDT0 return -EREMOTE, it will
2843 * resend unlink RPC to MDT1 (retry 1st time).
2845 * 2. During the unlink RPC in flight,
2846 * client B mv /mnt/lustre/remote1 /mnt/lustre/remote2
2847 * and create new remote1, but on MDT0
2849 * 3. MDT1 get unlink RPC(from A), then do remote lock on
2850 * /mnt/lustre, then lookup get fid of remote1, and find
2851 * it is remote dir again, and replay -EREMOTE again.
2853 * 4. Then A will resend unlink RPC to MDT0. (retry 2nd times).
2855 * In theory, it might try unlimited time here, but it should
2856 * be very rare case. */
2857 op_data->op_fid2 = body->mbo_fid1;
2858 ptlrpc_req_finished(*request);
2864 static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2866 struct lmv_obd *lmv = &obd->u.lmv;
2870 case OBD_CLEANUP_EARLY:
2871 /* XXX: here should be calling obd_precleanup() down to
2874 case OBD_CLEANUP_EXPORTS:
2875 fld_client_proc_fini(&lmv->lmv_fld);
2876 lprocfs_obd_cleanup(obd);
2877 lprocfs_free_md_stats(obd);
2885 static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
2886 __u32 keylen, void *key, __u32 *vallen, void *val,
2887 struct lov_stripe_md *lsm)
2889 struct obd_device *obd;
2890 struct lmv_obd *lmv;
2894 obd = class_exp2obd(exp);
2896 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2897 exp->exp_handle.h_cookie);
2902 if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2905 rc = lmv_check_connect(obd);
2909 LASSERT(*vallen == sizeof(__u32));
2910 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2911 struct lmv_tgt_desc *tgt = lmv->tgts[i];
2913 * All tgts should be connected when this gets called.
2915 if (tgt == NULL || tgt->ltd_exp == NULL)
2918 if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
2923 } else if (KEY_IS(KEY_MAX_EASIZE) ||
2924 KEY_IS(KEY_DEFAULT_EASIZE) ||
2925 KEY_IS(KEY_MAX_COOKIESIZE) ||
2926 KEY_IS(KEY_DEFAULT_COOKIESIZE) ||
2927 KEY_IS(KEY_CONN_DATA)) {
2928 rc = lmv_check_connect(obd);
2933 * Forwarding this request to first MDS, it should know LOV
2936 rc = obd_get_info(env, lmv->tgts[0]->ltd_exp, keylen, key,
2938 if (!rc && KEY_IS(KEY_CONN_DATA))
2939 exp->exp_connect_data = *(struct obd_connect_data *)val;
2941 } else if (KEY_IS(KEY_TGT_COUNT)) {
2942 *((int *)val) = lmv->desc.ld_tgt_count;
2946 CDEBUG(D_IOCTL, "Invalid key\n");
2950 int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
2951 obd_count keylen, void *key, obd_count vallen,
2952 void *val, struct ptlrpc_request_set *set)
2954 struct lmv_tgt_desc *tgt = NULL;
2955 struct obd_device *obd;
2956 struct lmv_obd *lmv;
2960 obd = class_exp2obd(exp);
2962 CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
2963 exp->exp_handle.h_cookie);
2968 if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX)) {
2971 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2974 if (tgt == NULL || tgt->ltd_exp == NULL)
2977 err = obd_set_info_async(env, tgt->ltd_exp,
2978 keylen, key, vallen, val, set);
2989 static int lmv_pack_md_v1(const struct lmv_stripe_md *lsm,
2990 struct lmv_mds_md_v1 *lmm1)
2995 lmm1->lmv_magic = cpu_to_le32(lsm->lsm_md_magic);
2996 lmm1->lmv_stripe_count = cpu_to_le32(lsm->lsm_md_stripe_count);
2997 lmm1->lmv_master_mdt_index = cpu_to_le32(lsm->lsm_md_master_mdt_index);
2998 lmm1->lmv_hash_type = cpu_to_le32(lsm->lsm_md_hash_type);
2999 cplen = strlcpy(lmm1->lmv_pool_name, lsm->lsm_md_pool_name,
3000 sizeof(lmm1->lmv_pool_name));
3001 if (cplen >= sizeof(lmm1->lmv_pool_name))
3004 for (i = 0; i < lsm->lsm_md_stripe_count; i++)
3005 fid_cpu_to_le(&lmm1->lmv_stripe_fids[i],
3006 &lsm->lsm_md_oinfo[i].lmo_fid);
3010 int lmv_pack_md(union lmv_mds_md **lmmp, const struct lmv_stripe_md *lsm,
3014 bool allocated = false;
3018 LASSERT(lmmp != NULL);
3020 if (*lmmp != NULL && lsm == NULL) {
3023 stripe_count = lmv_mds_md_stripe_count_get(*lmmp);
3024 lmm_size = lmv_mds_md_size(stripe_count,
3025 le32_to_cpu((*lmmp)->lmv_magic));
3028 OBD_FREE(*lmmp, lmm_size);
3034 if (*lmmp == NULL && lsm == NULL) {
3035 lmm_size = lmv_mds_md_size(stripe_count, LMV_MAGIC);
3036 LASSERT(lmm_size > 0);
3037 OBD_ALLOC(*lmmp, lmm_size);
3040 lmv_mds_md_stripe_count_set(*lmmp, stripe_count);
3041 (*lmmp)->lmv_magic = cpu_to_le32(LMV_MAGIC);
3046 LASSERT(lsm != NULL);
3047 lmm_size = lmv_mds_md_size(lsm->lsm_md_stripe_count, lsm->lsm_md_magic);
3048 if (*lmmp == NULL) {
3049 OBD_ALLOC(*lmmp, lmm_size);
3055 switch (lsm->lsm_md_magic) {
3057 rc = lmv_pack_md_v1(lsm, &(*lmmp)->lmv_md_v1);
3064 if (rc != 0 && allocated) {
3065 OBD_FREE(*lmmp, lmm_size);
3071 EXPORT_SYMBOL(lmv_pack_md);
3073 static int lmv_unpack_md_v1(struct obd_export *exp, struct lmv_stripe_md *lsm,
3074 const struct lmv_mds_md_v1 *lmm1)
3076 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3083 lsm->lsm_md_magic = le32_to_cpu(lmm1->lmv_magic);
3084 lsm->lsm_md_stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
3085 lsm->lsm_md_master_mdt_index = le32_to_cpu(lmm1->lmv_master_mdt_index);
3086 if (OBD_FAIL_CHECK(OBD_FAIL_UNKNOWN_LMV_STRIPE))
3087 lsm->lsm_md_hash_type = LMV_HASH_TYPE_UNKNOWN;
3089 lsm->lsm_md_hash_type = le32_to_cpu(lmm1->lmv_hash_type);
3090 lsm->lsm_md_layout_version = le32_to_cpu(lmm1->lmv_layout_version);
3091 cplen = strlcpy(lsm->lsm_md_pool_name, lmm1->lmv_pool_name,
3092 sizeof(lsm->lsm_md_pool_name));
3094 if (cplen >= sizeof(lsm->lsm_md_pool_name))
3097 CDEBUG(D_INFO, "unpack lsm count %d, master %d hash_type %d"
3098 "layout_version %d\n", lsm->lsm_md_stripe_count,
3099 lsm->lsm_md_master_mdt_index, lsm->lsm_md_hash_type,
3100 lsm->lsm_md_layout_version);
3102 stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
3103 for (i = 0; i < le32_to_cpu(stripe_count); i++) {
3104 fid_le_to_cpu(&lsm->lsm_md_oinfo[i].lmo_fid,
3105 &lmm1->lmv_stripe_fids[i]);
3106 rc = lmv_fld_lookup(lmv, &lsm->lsm_md_oinfo[i].lmo_fid,
3107 &lsm->lsm_md_oinfo[i].lmo_mds);
3110 CDEBUG(D_INFO, "unpack fid #%d "DFID"\n", i,
3111 PFID(&lsm->lsm_md_oinfo[i].lmo_fid));
3117 int lmv_unpack_md(struct obd_export *exp, struct lmv_stripe_md **lsmp,
3118 const union lmv_mds_md *lmm, int stripe_count)
3120 struct lmv_stripe_md *lsm;
3123 bool allocated = false;
3126 LASSERT(lsmp != NULL);
3130 if (lsm != NULL && lmm == NULL) {
3133 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
3134 /* For migrating inode, the master stripe and master
3135 * object will be the same, so do not need iput, see
3136 * ll_update_lsm_md */
3137 if (!(lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION &&
3138 i == 0) && lsm->lsm_md_oinfo[i].lmo_root != NULL)
3139 iput(lsm->lsm_md_oinfo[i].lmo_root);
3142 lsm_size = lmv_stripe_md_size(lsm->lsm_md_stripe_count);
3143 OBD_FREE(lsm, lsm_size);
3149 if (lsm == NULL && lmm == NULL) {
3150 lsm_size = lmv_stripe_md_size(stripe_count);
3151 OBD_ALLOC(lsm, lsm_size);
3154 lsm->lsm_md_stripe_count = stripe_count;
3159 if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_STRIPE)
3163 if (le32_to_cpu(lmm->lmv_magic) != LMV_MAGIC_V1 &&
3164 le32_to_cpu(lmm->lmv_magic) != LMV_USER_MAGIC) {
3165 CERROR("%s: invalid lmv magic %x: rc = %d\n",
3166 exp->exp_obd->obd_name, le32_to_cpu(lmm->lmv_magic),
3171 if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_V1)
3172 lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
3175 * Unpack default dirstripe(lmv_user_md) to lmv_stripe_md,
3176 * stripecount should be 0 then.
3178 lsm_size = lmv_stripe_md_size(0);
3180 lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
3182 OBD_ALLOC(lsm, lsm_size);
3189 switch (le32_to_cpu(lmm->lmv_magic)) {
3191 rc = lmv_unpack_md_v1(exp, lsm, &lmm->lmv_md_v1);
3194 CERROR("%s: unrecognized magic %x\n", exp->exp_obd->obd_name,
3195 le32_to_cpu(lmm->lmv_magic));
3200 if (rc != 0 && allocated) {
3201 OBD_FREE(lsm, lsm_size);
3208 int lmv_alloc_memmd(struct lmv_stripe_md **lsmp, int stripes)
3210 return lmv_unpack_md(NULL, lsmp, NULL, stripes);
3212 EXPORT_SYMBOL(lmv_alloc_memmd);
3214 void lmv_free_memmd(struct lmv_stripe_md *lsm)
3216 lmv_unpack_md(NULL, &lsm, NULL, 0);
3218 EXPORT_SYMBOL(lmv_free_memmd);
3220 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
3221 struct lov_mds_md *lmm, int disk_len)
3223 return lmv_unpack_md(exp, (struct lmv_stripe_md **)lsmp,
3224 (union lmv_mds_md *)lmm, disk_len);
3227 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
3228 struct lov_stripe_md *lsm)
3230 struct obd_device *obd = exp->exp_obd;
3231 struct lmv_obd *lmv_obd = &obd->u.lmv;
3232 const struct lmv_stripe_md *lmv = (struct lmv_stripe_md *)lsm;
3237 stripe_count = lmv->lsm_md_stripe_count;
3239 stripe_count = lmv_obd->desc.ld_tgt_count;
3241 return lmv_mds_md_size(stripe_count, LMV_MAGIC_V1);
3244 return lmv_pack_md((union lmv_mds_md **)lmmp, lmv, 0);
3247 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
3248 ldlm_policy_data_t *policy, ldlm_mode_t mode,
3249 ldlm_cancel_flags_t flags, void *opaque)
3251 struct obd_device *obd = exp->exp_obd;
3252 struct lmv_obd *lmv = &obd->u.lmv;
3258 LASSERT(fid != NULL);
3260 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3261 struct lmv_tgt_desc *tgt = lmv->tgts[i];
3263 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
3266 err = md_cancel_unused(tgt->ltd_exp, fid, policy, mode, flags,
3274 int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
3277 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3278 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3282 if (tgt == NULL || tgt->ltd_exp == NULL)
3284 rc = md_set_lock_data(tgt->ltd_exp, lockh, data, bits);
3288 ldlm_mode_t lmv_lock_match(struct obd_export *exp, __u64 flags,
3289 const struct lu_fid *fid, ldlm_type_t type,
3290 ldlm_policy_data_t *policy, ldlm_mode_t mode,
3291 struct lustre_handle *lockh)
3293 struct obd_device *obd = exp->exp_obd;
3294 struct lmv_obd *lmv = &obd->u.lmv;
3300 CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
3303 * With DNE every object can have two locks in different namespaces:
3304 * lookup lock in space of MDT storing direntry and update/open lock in
3305 * space of MDT storing inode. Try the MDT that the FID maps to first,
3306 * since this can be easily found, and only try others if that fails.
3308 for (i = 0, tgt = lmv_find_target_index(lmv, fid);
3309 i < lmv->desc.ld_tgt_count;
3310 i++, tgt = (tgt + 1) % lmv->desc.ld_tgt_count) {
3312 CDEBUG(D_HA, "%s: "DFID" is inaccessible: rc = %d\n",
3313 obd->obd_name, PFID(fid), tgt);
3317 if (lmv->tgts[tgt] == NULL ||
3318 lmv->tgts[tgt]->ltd_exp == NULL ||
3319 lmv->tgts[tgt]->ltd_active == 0)
3322 rc = md_lock_match(lmv->tgts[tgt]->ltd_exp, flags, fid,
3323 type, policy, mode, lockh);
3331 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
3332 struct obd_export *dt_exp, struct obd_export *md_exp,
3333 struct lustre_md *md)
3335 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3336 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3338 if (tgt == NULL || tgt->ltd_exp == NULL)
3341 return md_get_lustre_md(lmv->tgts[0]->ltd_exp, req, dt_exp, md_exp, md);
3344 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
3346 struct obd_device *obd = exp->exp_obd;
3347 struct lmv_obd *lmv = &obd->u.lmv;
3348 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3351 if (md->lmv != NULL) {
3352 lmv_free_memmd(md->lmv);
3355 if (tgt == NULL || tgt->ltd_exp == NULL)
3357 RETURN(md_free_lustre_md(lmv->tgts[0]->ltd_exp, md));
3360 int lmv_set_open_replay_data(struct obd_export *exp,
3361 struct obd_client_handle *och,
3362 struct lookup_intent *it)
3364 struct obd_device *obd = exp->exp_obd;
3365 struct lmv_obd *lmv = &obd->u.lmv;
3366 struct lmv_tgt_desc *tgt;
3369 tgt = lmv_find_target(lmv, &och->och_fid);
3371 RETURN(PTR_ERR(tgt));
3373 RETURN(md_set_open_replay_data(tgt->ltd_exp, och, it));
3376 int lmv_clear_open_replay_data(struct obd_export *exp,
3377 struct obd_client_handle *och)
3379 struct obd_device *obd = exp->exp_obd;
3380 struct lmv_obd *lmv = &obd->u.lmv;
3381 struct lmv_tgt_desc *tgt;
3384 tgt = lmv_find_target(lmv, &och->och_fid);
3386 RETURN(PTR_ERR(tgt));
3388 RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
3391 static int lmv_get_remote_perm(struct obd_export *exp,
3392 const struct lu_fid *fid,
3393 struct obd_capa *oc, __u32 suppgid,
3394 struct ptlrpc_request **request)
3396 struct obd_device *obd = exp->exp_obd;
3397 struct lmv_obd *lmv = &obd->u.lmv;
3398 struct lmv_tgt_desc *tgt;
3402 rc = lmv_check_connect(obd);
3406 tgt = lmv_find_target(lmv, fid);
3408 RETURN(PTR_ERR(tgt));
3410 rc = md_get_remote_perm(tgt->ltd_exp, fid, oc, suppgid, request);
3414 static int lmv_renew_capa(struct obd_export *exp, struct obd_capa *oc,
3417 struct obd_device *obd = exp->exp_obd;
3418 struct lmv_obd *lmv = &obd->u.lmv;
3419 struct lmv_tgt_desc *tgt;
3423 rc = lmv_check_connect(obd);
3427 tgt = lmv_find_target(lmv, &oc->c_capa.lc_fid);
3429 RETURN(PTR_ERR(tgt));
3431 rc = md_renew_capa(tgt->ltd_exp, oc, cb);
3435 int lmv_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
3436 const struct req_msg_field *field, struct obd_capa **oc)
3438 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3439 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3441 if (tgt == NULL || tgt->ltd_exp == NULL)
3443 return md_unpack_capa(tgt->ltd_exp, req, field, oc);
3446 int lmv_intent_getattr_async(struct obd_export *exp,
3447 struct md_enqueue_info *minfo,
3448 struct ldlm_enqueue_info *einfo)
3450 struct md_op_data *op_data = &minfo->mi_data;
3451 struct obd_device *obd = exp->exp_obd;
3452 struct lmv_obd *lmv = &obd->u.lmv;
3453 struct lmv_tgt_desc *tgt = NULL;
3457 rc = lmv_check_connect(obd);
3461 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
3463 RETURN(PTR_ERR(tgt));
3465 rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
3469 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
3470 struct lu_fid *fid, __u64 *bits)
3472 struct obd_device *obd = exp->exp_obd;
3473 struct lmv_obd *lmv = &obd->u.lmv;
3474 struct lmv_tgt_desc *tgt;
3478 rc = lmv_check_connect(obd);
3482 tgt = lmv_find_target(lmv, fid);
3484 RETURN(PTR_ERR(tgt));
3486 rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
3490 int lmv_get_fid_from_lsm(struct obd_export *exp,
3491 const struct lmv_stripe_md *lsm,
3492 const char *name, int namelen, struct lu_fid *fid)
3494 const struct lmv_oinfo *oinfo;
3496 LASSERT(lsm != NULL);
3497 oinfo = lsm_name_to_stripe_info(lsm, name, namelen);
3499 return PTR_ERR(oinfo);
3501 *fid = oinfo->lmo_fid;
3507 * For lmv, only need to send request to master MDT, and the master MDT will
3508 * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
3509 * we directly fetch data from the slave MDTs.
3511 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
3512 struct obd_quotactl *oqctl)
3514 struct obd_device *obd = class_exp2obd(exp);
3515 struct lmv_obd *lmv = &obd->u.lmv;
3516 struct lmv_tgt_desc *tgt = lmv->tgts[0];
3519 __u64 curspace, curinodes;
3523 tgt->ltd_exp == NULL ||
3525 lmv->desc.ld_tgt_count == 0) {
3526 CERROR("master lmv inactive\n");
3530 if (oqctl->qc_cmd != Q_GETOQUOTA) {
3531 rc = obd_quotactl(tgt->ltd_exp, oqctl);
3535 curspace = curinodes = 0;
3536 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3540 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active)
3543 err = obd_quotactl(tgt->ltd_exp, oqctl);
3545 CERROR("getquota on mdt %d failed. %d\n", i, err);
3549 curspace += oqctl->qc_dqblk.dqb_curspace;
3550 curinodes += oqctl->qc_dqblk.dqb_curinodes;
3553 oqctl->qc_dqblk.dqb_curspace = curspace;
3554 oqctl->qc_dqblk.dqb_curinodes = curinodes;
3559 int lmv_quotacheck(struct obd_device *unused, struct obd_export *exp,
3560 struct obd_quotactl *oqctl)
3562 struct obd_device *obd = class_exp2obd(exp);
3563 struct lmv_obd *lmv = &obd->u.lmv;
3564 struct lmv_tgt_desc *tgt;
3569 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
3572 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active) {
3573 CERROR("lmv idx %d inactive\n", i);
3577 err = obd_quotacheck(tgt->ltd_exp, oqctl);
3585 int lmv_update_lsm_md(struct obd_export *exp, struct lmv_stripe_md *lsm,
3586 struct mdt_body *body, ldlm_blocking_callback cb_blocking)
3588 return lmv_revalidate_slaves(exp, body, lsm, cb_blocking, 0);
3591 int lmv_merge_attr(struct obd_export *exp, const struct lmv_stripe_md *lsm,
3592 struct cl_attr *attr)
3597 for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
3598 struct inode *inode = lsm->lsm_md_oinfo[i].lmo_root;
3600 CDEBUG(D_INFO, ""DFID" size %llu, nlink %u, atime %lu ctime"
3601 "%lu, mtime %lu.\n", PFID(&lsm->lsm_md_oinfo[i].lmo_fid),
3602 i_size_read(inode), inode->i_nlink,
3603 LTIME_S(inode->i_atime), LTIME_S(inode->i_ctime),
3604 LTIME_S(inode->i_mtime));
3606 /* for slave stripe, it needs to subtract nlink for . and .. */
3608 attr->cat_nlink += inode->i_nlink - 2;
3610 attr->cat_nlink = inode->i_nlink;
3612 attr->cat_size += i_size_read(inode);
3614 if (attr->cat_atime < LTIME_S(inode->i_atime))
3615 attr->cat_atime = LTIME_S(inode->i_atime);
3617 if (attr->cat_ctime < LTIME_S(inode->i_ctime))
3618 attr->cat_ctime = LTIME_S(inode->i_ctime);
3620 if (attr->cat_mtime < LTIME_S(inode->i_mtime))
3621 attr->cat_mtime = LTIME_S(inode->i_mtime);
3627 struct obd_ops lmv_obd_ops = {
3628 .o_owner = THIS_MODULE,
3629 .o_setup = lmv_setup,
3630 .o_cleanup = lmv_cleanup,
3631 .o_precleanup = lmv_precleanup,
3632 .o_process_config = lmv_process_config,
3633 .o_connect = lmv_connect,
3634 .o_disconnect = lmv_disconnect,
3635 .o_statfs = lmv_statfs,
3636 .o_get_info = lmv_get_info,
3637 .o_set_info_async = lmv_set_info_async,
3638 .o_packmd = lmv_packmd,
3639 .o_unpackmd = lmv_unpackmd,
3640 .o_notify = lmv_notify,
3641 .o_get_uuid = lmv_get_uuid,
3642 .o_iocontrol = lmv_iocontrol,
3643 .o_quotacheck = lmv_quotacheck,
3644 .o_quotactl = lmv_quotactl
3647 struct md_ops lmv_md_ops = {
3648 .m_getstatus = lmv_getstatus,
3649 .m_null_inode = lmv_null_inode,
3650 .m_find_cbdata = lmv_find_cbdata,
3651 .m_close = lmv_close,
3652 .m_create = lmv_create,
3653 .m_done_writing = lmv_done_writing,
3654 .m_enqueue = lmv_enqueue,
3655 .m_getattr = lmv_getattr,
3656 .m_getxattr = lmv_getxattr,
3657 .m_getattr_name = lmv_getattr_name,
3658 .m_intent_lock = lmv_intent_lock,
3660 .m_rename = lmv_rename,
3661 .m_setattr = lmv_setattr,
3662 .m_setxattr = lmv_setxattr,
3663 .m_fsync = lmv_fsync,
3664 .m_read_page = lmv_read_page,
3665 .m_unlink = lmv_unlink,
3666 .m_init_ea_size = lmv_init_ea_size,
3667 .m_cancel_unused = lmv_cancel_unused,
3668 .m_set_lock_data = lmv_set_lock_data,
3669 .m_lock_match = lmv_lock_match,
3670 .m_get_lustre_md = lmv_get_lustre_md,
3671 .m_free_lustre_md = lmv_free_lustre_md,
3672 .m_update_lsm_md = lmv_update_lsm_md,
3673 .m_merge_attr = lmv_merge_attr,
3674 .m_set_open_replay_data = lmv_set_open_replay_data,
3675 .m_clear_open_replay_data = lmv_clear_open_replay_data,
3676 .m_renew_capa = lmv_renew_capa,
3677 .m_unpack_capa = lmv_unpack_capa,
3678 .m_get_remote_perm = lmv_get_remote_perm,
3679 .m_intent_getattr_async = lmv_intent_getattr_async,
3680 .m_revalidate_lock = lmv_revalidate_lock,
3681 .m_get_fid_from_lsm = lmv_get_fid_from_lsm,
3684 int __init lmv_init(void)
3686 return class_register_type(&lmv_obd_ops, &lmv_md_ops, true, NULL,
3687 #ifndef HAVE_ONLY_PROCFS_SEQ
3690 LUSTRE_LMV_NAME, NULL);
3694 static void lmv_exit(void)
3696 class_unregister_type(LUSTRE_LMV_NAME);
3699 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3700 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
3701 MODULE_LICENSE("GPL");
3703 module_init(lmv_init);
3704 module_exit(lmv_exit);