1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 # define EXPORT_SYMTAB
25 #define DEBUG_SUBSYSTEM S_LMV
27 #include <linux/slab.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/pagemap.h>
32 #include <asm/div64.h>
33 #include <linux/seq_file.h>
34 #include <linux/namei.h>
36 #include <liblustre.h>
38 #include <linux/ext2_fs.h>
40 #include <linux/obd_support.h>
41 #include <linux/lustre_lib.h>
42 #include <linux/lustre_net.h>
43 #include <linux/lustre_idl.h>
44 #include <linux/lustre_dlm.h>
45 #include <linux/lustre_mds.h>
46 #include <linux/obd_class.h>
47 #include <linux/obd_ost.h>
48 #include <linux/lprocfs_status.h>
49 #include <linux/lustre_fsfilt.h>
50 #include <linux/obd_lmv.h>
51 #include <linux/lustre_lite.h>
52 #include "lmv_internal.h"
54 /* not defined for liblustre building */
55 #if !defined(ATOMIC_INIT)
56 #define ATOMIC_INIT(val) { (val) }
60 kmem_cache_t *obj_cache;
61 atomic_t obj_cache_count = ATOMIC_INIT(0);
63 static void lmv_activate_target(struct lmv_obd *lmv,
64 struct lmv_tgt_desc *tgt,
67 if (tgt->active == activate)
70 tgt->active = activate;
71 lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
76 * -EINVAL : UUID can't be found in the LMV's target list
77 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
78 * -EBADF : The UUID is found, but the OBD of the wrong type (!)
80 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
83 struct lmv_tgt_desc *tgt;
84 struct obd_device *obd;
88 CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
89 lmv, uuid->uuid, activate);
91 spin_lock(&lmv->lmv_lock);
92 for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgt++) {
93 if (tgt->ltd_exp == NULL)
96 CDEBUG(D_INFO, "lmv idx %d is %s conn "LPX64"\n",
97 i, tgt->uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
99 if (strncmp(uuid->uuid, tgt->uuid.uuid, sizeof uuid->uuid) == 0)
103 if (i == lmv->desc.ld_tgt_count)
104 GOTO(out_lmv_lock, rc = -EINVAL);
106 obd = class_exp2obd(tgt->ltd_exp);
108 GOTO(out_lmv_lock, rc = -ENOTCONN);
110 CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
111 obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
112 obd->obd_type->typ_name, i);
113 LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
115 if (tgt->active == activate) {
116 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
117 activate ? "" : "in");
118 GOTO(out_lmv_lock, rc);
121 CDEBUG(D_INFO, "Marking OBD %p %sactive\n",
122 obd, activate ? "" : "in");
124 lmv_activate_target(lmv, tgt, activate);
129 spin_unlock(&lmv->lmv_lock);
133 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
134 int active, void *data)
136 struct obd_uuid *uuid;
140 if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
141 CERROR("unexpected notification of %s %s!\n",
142 watched->obd_type->typ_name,
146 uuid = &watched->u.cli.cl_import->imp_target_uuid;
148 /* Set MDC as active before notifying the observer, so the observer can
149 * use the MDC normally.
151 rc = lmv_set_mdc_active(&obd->u.lmv, uuid, active);
153 CERROR("%sactivation of %s failed: %d\n",
154 active ? "" : "de", uuid->uuid, rc);
158 if (obd->obd_observer)
159 /* Pass the notification up the chain. */
160 rc = obd_notify(obd->obd_observer, watched, active, data);
165 int lmv_attach(struct obd_device *dev, obd_count len, void *data)
167 struct lprocfs_static_vars lvars;
171 lprocfs_init_vars(lmv, &lvars);
172 rc = lprocfs_obd_attach(dev, lvars.obd_vars);
175 struct proc_dir_entry *entry;
177 entry = create_proc_entry("target_obd_status", 0444,
178 dev->obd_proc_entry);
181 entry->proc_fops = &lmv_proc_target_fops;
188 int lmv_detach(struct obd_device *dev)
190 return lprocfs_obd_detach(dev);
193 /* this is fake connect function. Its purpose is to initialize lmv and say
194 * caller that everything is okay. Real connection will be performed later. */
195 static int lmv_connect(struct lustre_handle *conn, struct obd_device *obd,
196 struct obd_uuid *cluuid, struct obd_connect_data *data,
200 struct proc_dir_entry *lmv_proc_dir;
202 struct lmv_obd *lmv = &obd->u.lmv;
203 struct obd_export *exp;
207 rc = class_connect(conn, obd, cluuid);
209 CERROR("class_connection() returned %d\n", rc);
213 exp = class_conn2export(conn);
215 /* we don't want to actually do the underlying connections more than
216 * once, so keep track. */
218 if (lmv->refcount > 1) {
219 class_export_put(exp);
225 lmv->cluuid = *cluuid;
226 lmv->connect_flags = flags;
227 sema_init(&lmv->init_sem, 1);
229 memcpy(&lmv->conn_data, data, sizeof(*data));
232 lmv_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
234 if (IS_ERR(lmv_proc_dir)) {
235 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
236 obd->obd_type->typ_name, obd->obd_name);
242 * all real clients shouls perform actual connection rightaway, because
243 * it is possible, that LMV will not have opportunity to connect
244 * targets, as MDC stuff will bit called directly, for instance while
245 * reading ../mdc/../kbytesfree procfs file, etc.
247 if (flags & OBD_OPT_REAL_CLIENT)
248 rc = lmv_check_connect(obd);
253 lprocfs_remove(lmv_proc_dir);
260 void lmv_set_timeouts(struct obd_device *obd)
262 struct lmv_tgt_desc *tgts;
267 if (lmv->server_timeout == 0)
270 if (lmv->connected == 0)
273 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
274 if (tgts->ltd_exp == NULL)
277 obd_set_info(tgts->ltd_exp, strlen("inter_mds"),
278 "inter_mds", 0, NULL);
282 #define MAX_STRING_SIZE 128
284 /* performs a check if passed obd is connected. If no - connect it. */
285 int lmv_check_connect(struct obd_device *obd)
288 struct proc_dir_entry *lmv_proc_dir;
290 struct lmv_obd *lmv = &obd->u.lmv;
291 struct lmv_tgt_desc *tgts;
292 struct obd_uuid *cluuid;
293 struct obd_export *exp;
300 down(&lmv->init_sem);
301 if (lmv->connected) {
306 cluuid = &lmv->cluuid;
309 CDEBUG(D_OTHER, "time to connect %s to %s\n",
310 cluuid->uuid, obd->obd_name);
312 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
313 struct obd_uuid lmv_mdc_uuid = { "LMV_MDC_UUID" };
314 struct lustre_handle conn = {0, };
315 struct obd_device *tgt_obd;
317 LASSERT(tgts != NULL);
319 tgt_obd = class_find_client_obd(&tgts->uuid, LUSTRE_MDC_NAME,
322 CERROR("target %s not attached\n", tgts->uuid.uuid);
323 GOTO(out_disc, rc = -EINVAL);
326 /* for MDS: don't connect to yourself */
327 if (obd_uuid_equals(&tgts->uuid, cluuid)) {
328 CDEBUG(D_OTHER, "don't connect back to %s\n",
330 tgts->ltd_exp = NULL;
334 CDEBUG(D_OTHER, "connect to %s(%s) - %s, %s FOR %s\n",
335 tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
336 tgts->uuid.uuid, obd->obd_uuid.uuid,
339 if (!tgt_obd->obd_set_up) {
340 CERROR("target %s not set up\n", tgts->uuid.uuid);
341 GOTO(out_disc, rc = -EINVAL);
344 rc = obd_connect(&conn, tgt_obd, &lmv_mdc_uuid, &lmv->conn_data,
347 CERROR("target %s connect error %d\n",
348 tgts->uuid.uuid, rc);
351 tgts->ltd_exp = class_conn2export(&conn);
353 obd_init_ea_size(tgts->ltd_exp, lmv->max_easize,
354 lmv->max_cookiesize);
356 rc = obd_register_observer(tgt_obd, obd);
358 CERROR("target %s register_observer error %d\n",
359 tgts->uuid.uuid, rc);
360 obd_disconnect(tgts->ltd_exp, 0);
364 lmv->desc.ld_active_tgt_count++;
367 CDEBUG(D_OTHER, "connected to %s(%s) successfully (%d)\n",
368 tgt_obd->obd_name, tgt_obd->obd_uuid.uuid,
369 atomic_read(&obd->obd_refcount));
372 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
374 struct obd_device *mdc_obd = class_conn2obd(&conn);
375 struct proc_dir_entry *mdc_symlink;
376 char name[MAX_STRING_SIZE + 1];
378 LASSERT(mdc_obd != NULL);
379 LASSERT(mdc_obd->obd_type != NULL);
380 LASSERT(mdc_obd->obd_type->typ_name != NULL);
381 name[MAX_STRING_SIZE] = '\0';
382 snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
383 mdc_obd->obd_type->typ_name,
385 mdc_symlink = proc_symlink(mdc_obd->obd_name,
387 if (mdc_symlink == NULL) {
388 CERROR("could not register LMV target "
389 "/proc/fs/lustre/%s/%s/target_obds/%s.",
390 obd->obd_type->typ_name, obd->obd_name,
392 lprocfs_remove(lmv_proc_dir);
399 lmv_set_timeouts(obd);
400 class_export_put(exp);
407 struct obd_uuid uuid;
409 --lmv->desc.ld_active_tgt_count;
411 /* save for CERROR below; (we know it's terminated) */
413 rc2 = obd_disconnect(tgts->ltd_exp, 0);
415 CERROR("error: LMV target %s disconnect on MDC idx %d: "
416 "error %d\n", uuid.uuid, i, rc2);
418 class_disconnect(exp, 0);
423 static int lmv_disconnect(struct obd_export *exp, unsigned long flags)
425 struct obd_device *obd = class_exp2obd(exp);
426 struct lmv_obd *lmv = &obd->u.lmv;
429 struct proc_dir_entry *lmv_proc_dir;
437 /* Only disconnect the underlying layers on the final disconnect. */
439 if (lmv->refcount != 0)
443 lmv_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
446 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
447 struct obd_device *mdc_obd;
449 if (lmv->tgts[i].ltd_exp == NULL)
452 mdc_obd = class_exp2obd(lmv->tgts[i].ltd_exp);
455 mdc_obd->obd_no_recov = obd->obd_no_recov;
459 struct proc_dir_entry *mdc_symlink;
461 mdc_symlink = lprocfs_srch(lmv_proc_dir, mdc_obd->obd_name);
463 lprocfs_remove(mdc_symlink);
465 CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
466 obd->obd_type->typ_name, obd->obd_name,
471 CDEBUG(D_OTHER, "disconnected from %s(%s) successfully\n",
472 lmv->tgts[i].ltd_exp->exp_obd->obd_name,
473 lmv->tgts[i].ltd_exp->exp_obd->obd_uuid.uuid);
475 obd_register_observer(lmv->tgts[i].ltd_exp->exp_obd, NULL);
476 rc = obd_disconnect(lmv->tgts[i].ltd_exp, flags);
478 if (lmv->tgts[i].active) {
479 CERROR("Target %s disconnect error %d\n",
480 lmv->tgts[i].uuid.uuid, rc);
485 lmv_activate_target(lmv, &lmv->tgts[i], 0);
486 lmv->tgts[i].ltd_exp = NULL;
491 lprocfs_remove(lmv_proc_dir);
493 CERROR("/proc/fs/lustre/%s/%s/target_obds missing\n",
494 obd->obd_type->typ_name, obd->obd_name);
499 /* this is the case when no real connection is established by
500 * lmv_check_connect(). */
502 class_export_put(exp);
503 rc = class_disconnect(exp, 0);
504 if (lmv->refcount == 0)
509 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
510 int len, void *karg, void *uarg)
512 struct obd_device *obddev = class_exp2obd(exp);
513 struct lmv_obd *lmv = &obddev->u.lmv;
514 int i, rc = 0, set = 0;
517 if (lmv->desc.ld_tgt_count == 0)
520 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
523 if (lmv->tgts[i].ltd_exp == NULL)
526 err = obd_iocontrol(cmd, lmv->tgts[i].ltd_exp, len, karg, uarg);
528 if (lmv->tgts[i].active) {
529 CERROR("error: iocontrol MDC %s on MDT"
530 "idx %d: err = %d\n",
531 lmv->tgts[i].uuid.uuid, i, err);
544 static int lmv_setup(struct obd_device *obd, obd_count len, void *buf)
547 struct lmv_desc *desc;
548 struct obd_uuid *uuids;
549 struct lmv_tgt_desc *tgts;
550 struct obd_device *tgt_obd;
551 struct lustre_cfg *lcfg = buf;
552 struct lmv_obd *lmv = &obd->u.lmv;
555 if (lcfg->lcfg_inllen1 < 1) {
556 CERROR("LMV setup requires a descriptor\n");
560 if (lcfg->lcfg_inllen2 < 1) {
561 CERROR("LMV setup requires an MDT UUID list\n");
565 desc = (struct lmv_desc *)lcfg->lcfg_inlbuf1;
566 if (sizeof(*desc) > lcfg->lcfg_inllen1) {
567 CERROR("descriptor size wrong: %d > %d\n",
568 (int)sizeof(*desc), lcfg->lcfg_inllen1);
572 uuids = (struct obd_uuid *)lcfg->lcfg_inlbuf2;
573 if (sizeof(*uuids) * desc->ld_tgt_count != lcfg->lcfg_inllen2) {
574 CERROR("UUID array size wrong: %u * %u != %u\n",
575 sizeof(*uuids), desc->ld_tgt_count, lcfg->lcfg_inllen2);
579 lmv->tgts_size = sizeof(struct lmv_tgt_desc) * desc->ld_tgt_count;
580 OBD_ALLOC(lmv->tgts, lmv->tgts_size);
581 if (lmv->tgts == NULL) {
582 CERROR("Out of memory\n");
587 spin_lock_init(&lmv->lmv_lock);
589 for (i = 0, tgts = lmv->tgts; i < desc->ld_tgt_count; i++, tgts++)
590 tgts->uuid = uuids[i];
592 lmv->max_cookiesize = 0;
594 lmv->max_easize = sizeof(struct lustre_id) *
595 desc->ld_tgt_count + sizeof(struct mea);
597 rc = lmv_setup_mgr(obd);
599 CERROR("Can't setup LMV object manager, "
601 OBD_FREE(lmv->tgts, lmv->tgts_size);
604 tgt_obd = class_find_client_obd(&lmv->tgts->uuid, LUSTRE_MDC_NAME,
607 CERROR("Target %s not attached\n", lmv->tgts->uuid.uuid);
614 static int lmv_cleanup(struct obd_device *obd, int flags)
616 struct lmv_obd *lmv = &obd->u.lmv;
619 lmv_cleanup_mgr(obd);
620 OBD_FREE(lmv->tgts, lmv->tgts_size);
625 static int lmv_statfs(struct obd_device *obd, struct obd_statfs *osfs,
626 unsigned long max_age)
628 struct lmv_obd *lmv = &obd->u.lmv;
629 struct obd_statfs *temp;
633 rc = lmv_check_connect(obd);
637 OBD_ALLOC(temp, sizeof(*temp));
641 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
642 if (lmv->tgts[i].ltd_exp == NULL) {
643 CWARN("%s: NULL export for %d\n", obd->obd_name, i);
647 rc = obd_statfs(lmv->tgts[i].ltd_exp->exp_obd, temp, max_age);
649 CERROR("can't stat MDS #%d (%s), error %d\n", i,
650 lmv->tgts[i].ltd_exp->exp_obd->obd_name,
652 GOTO(out_free_temp, rc);
655 memcpy(osfs, temp, sizeof(*temp));
657 osfs->os_bavail += temp->os_bavail;
658 osfs->os_blocks += temp->os_blocks;
659 osfs->os_ffree += temp->os_ffree;
660 osfs->os_files += temp->os_files;
666 OBD_FREE(temp, sizeof(*temp));
670 static int lmv_getstatus(struct obd_export *exp, struct lustre_id *id)
672 struct obd_device *obd = exp->exp_obd;
673 struct lmv_obd *lmv = &obd->u.lmv;
677 rc = lmv_check_connect(obd);
681 rc = md_getstatus(lmv->tgts[0].ltd_exp, id);
687 static int lmv_getattr(struct obd_export *exp, struct lustre_id *id,
688 __u64 valid, const char *ea_name, int ea_namelen,
689 unsigned int ea_size, struct ptlrpc_request **request)
691 struct obd_device *obd = exp->exp_obd;
692 struct lmv_obd *lmv = &obd->u.lmv;
693 int rc, i = id_group(id);
697 rc = lmv_check_connect(obd);
701 LASSERT(i < lmv->desc.ld_tgt_count);
704 rc = md_getattr(lmv->tgts[i].ltd_exp, id, valid,
705 ea_name, ea_namelen, ea_size, request);
709 obj = lmv_grab_obj(obd, id);
711 CDEBUG(D_OTHER, "GETATTR for "DLID4" %s\n",
712 OLID4(id), obj ? "(splitted)" : "");
715 * if object is splitted, then we loop over all the slaves and gather
716 * size attribute. In ideal world we would have to gather also mds field
717 * from all slaves, as object is spread over the cluster and this is
718 * definitely interesting information and it is not good to loss it,
722 struct mds_body *body;
724 if (*request == NULL) {
729 body = lustre_msg_buf((*request)->rq_repmsg, 0,
731 LASSERT(body != NULL);
735 for (i = 0; i < obj->objcount; i++) {
737 if (lmv->tgts[i].ltd_exp == NULL) {
738 CWARN("%s: NULL export for %d\n",
743 /* skip master obj. */
744 if (id_equal_fid(&obj->id, &obj->objs[i].id))
747 body->size += obj->objs[i].size;
757 static int lmv_change_cbdata(struct obd_export *exp,
758 struct lustre_id *id,
762 struct obd_device *obd = exp->exp_obd;
763 struct lmv_obd *lmv = &obd->u.lmv;
767 rc = lmv_check_connect(obd);
771 CDEBUG(D_OTHER, "CBDATA for "DLID4"\n", OLID4(id));
772 LASSERT(id_group(id) < lmv->desc.ld_tgt_count);
774 rc = md_change_cbdata(lmv->tgts[id_group(id)].ltd_exp,
780 static int lmv_change_cbdata_name(struct obd_export *exp,
781 struct lustre_id *pid,
783 struct lustre_id *cid,
787 struct obd_device *obd = exp->exp_obd;
788 struct lmv_obd *lmv = &obd->u.lmv;
789 struct lustre_id rcid = *cid;
794 rc = lmv_check_connect(obd);
798 LASSERT(id_group(pid) < lmv->desc.ld_tgt_count);
799 LASSERT(id_group(cid) < lmv->desc.ld_tgt_count);
801 CDEBUG(D_OTHER, "CBDATA for "DLID4":%*s -> "DLID4"\n",
802 OLID4(pid), len, name, OLID4(cid));
804 /* this is default mds for directory name belongs to. */
806 obj = lmv_grab_obj(obd, pid);
808 /* directory is splitted. look for right mds for this name. */
809 mds = raw_name2idx(obj->hashtype, obj->objcount, name, len);
810 rcid = obj->objs[mds].id;
811 mds = id_group(&rcid);
814 rc = md_change_cbdata(lmv->tgts[mds].ltd_exp, &rcid, it, data);
818 static int lmv_valid_attrs(struct obd_export *exp, struct lustre_id *id)
820 struct obd_device *obd = exp->exp_obd;
821 struct lmv_obd *lmv = &obd->u.lmv;
825 rc = lmv_check_connect(obd);
829 CDEBUG(D_OTHER, "validate "DLID4"\n", OLID4(id));
830 LASSERT(id_group(id) < lmv->desc.ld_tgt_count);
831 rc = md_valid_attrs(lmv->tgts[id_group(id)].ltd_exp, id);
835 int lmv_close(struct obd_export *exp, struct obdo *obdo,
836 struct obd_client_handle *och,
837 struct ptlrpc_request **request)
839 struct obd_device *obd = exp->exp_obd;
840 struct lmv_obd *lmv = &obd->u.lmv;
841 int rc, i = obdo->o_mds;
844 rc = lmv_check_connect(obd);
848 LASSERT(i < lmv->desc.ld_tgt_count);
849 CDEBUG(D_OTHER, "CLOSE %lu/%lu/%lu\n", (unsigned long)obdo->o_mds,
850 (unsigned long)obdo->o_id, (unsigned long)obdo->o_generation);
851 rc = md_close(lmv->tgts[i].ltd_exp, obdo, och, request);
855 int lmv_get_mea_and_update_object(struct obd_export *exp,
856 struct lustre_id *id)
858 struct obd_device *obd = exp->exp_obd;
859 struct lmv_obd *lmv = &obd->u.lmv;
860 struct ptlrpc_request *req = NULL;
868 mealen = MEA_SIZE_LMV(lmv);
870 valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA | OBD_MD_MEA;
872 /* time to update mea of parent id */
873 rc = md_getattr(lmv->tgts[id_group(id)].ltd_exp,
874 id, valid, NULL, 0, mealen, &req);
876 CERROR("md_getattr() failed, error %d\n", rc);
880 rc = mdc_req2lustre_md(exp, req, 0, NULL, &md);
882 CERROR("mdc_req2lustre_md() failed, error %d\n", rc);
887 GOTO(cleanup, rc = -ENODATA);
889 obj = lmv_create_obj(exp, id, md.mea);
894 obd_free_memmd(exp, (struct lov_stripe_md **)&md.mea);
899 ptlrpc_req_finished(req);
903 int lmv_create(struct obd_export *exp, struct mdc_op_data *op_data,
904 const void *data, int datalen, int mode, __u32 uid,
905 __u32 gid, __u64 rdev, struct ptlrpc_request **request)
907 struct obd_device *obd = exp->exp_obd;
908 struct lmv_obd *lmv = &obd->u.lmv;
909 struct mds_body *body;
911 int rc, mds, loop = 0;
914 rc = lmv_check_connect(obd);
918 if (!lmv->desc.ld_active_tgt_count)
921 LASSERT(++loop <= 2);
922 obj = lmv_grab_obj(obd, &op_data->id1);
924 mds = raw_name2idx(obj->hashtype, obj->objcount,
925 op_data->name, op_data->namelen);
926 op_data->id1 = obj->objs[mds].id;
930 CDEBUG(D_OTHER, "CREATE '%*s' on "DLID4"\n", op_data->namelen,
931 op_data->name, OLID4(&op_data->id1));
933 rc = md_create(lmv->tgts[id_group(&op_data->id1)].ltd_exp,
934 op_data, data, datalen, mode, uid, gid, rdev,
937 if (*request == NULL)
940 body = lustre_msg_buf((*request)->rq_repmsg, 0,
945 CDEBUG(D_OTHER, "created. "DLID4"\n", OLID4(&op_data->id1));
946 } else if (rc == -ERESTART) {
948 * directory got splitted. time to update local object and
949 * repeat the request with proper MDS.
951 rc = lmv_get_mea_and_update_object(exp, &op_data->id1);
953 ptlrpc_req_finished(*request);
960 int lmv_done_writing(struct obd_export *exp, struct obdo *obdo)
962 struct obd_device *obd = exp->exp_obd;
963 struct lmv_obd *lmv = &obd->u.lmv;
967 rc = lmv_check_connect(obd);
971 /* FIXME: choose right MDC here */
972 CWARN("this method isn't implemented yet\n");
973 rc = md_done_writing(lmv->tgts[0].ltd_exp, obdo);
977 int lmv_enqueue_slaves(struct obd_export *exp, int locktype,
978 struct lookup_intent *it, int lockmode,
979 struct mdc_op_data *data, struct lustre_handle *lockh,
980 void *lmm, int lmmsize, ldlm_completion_callback cb_compl,
981 ldlm_blocking_callback cb_blocking, void *cb_data)
983 struct obd_device *obd = exp->exp_obd;
984 struct lmv_obd *lmv = &obd->u.lmv;
985 struct mea *mea = data->mea1;
986 struct mdc_op_data *data2;
990 OBD_ALLOC(data2, sizeof(*data2));
994 LASSERT(mea != NULL);
995 for (i = 0; i < mea->mea_count; i++) {
996 memset(data2, 0, sizeof(*data2));
997 data2->id1 = mea->mea_ids[i];
998 mds = id_group(&data2->id1);
1000 if (lmv->tgts[mds].ltd_exp == NULL)
1003 rc = md_enqueue(lmv->tgts[mds].ltd_exp, locktype, it,
1004 lockmode, data2, lockh + i, lmm, lmmsize,
1005 cb_compl, cb_blocking, cb_data);
1007 CDEBUG(D_OTHER, "take lock on slave "DLID4" -> %d/%d\n",
1008 OLID4(&mea->mea_ids[i]), rc, LUSTRE_IT(it)->it_status);
1011 if (LUSTRE_IT(it)->it_data) {
1012 struct ptlrpc_request *req;
1013 req = (struct ptlrpc_request *) LUSTRE_IT(it)->it_data;
1014 ptlrpc_req_finished(req);
1017 if (LUSTRE_IT(it)->it_status)
1018 GOTO(cleanup, rc = LUSTRE_IT(it)->it_status);
1021 OBD_FREE(data2, sizeof(*data2));
1024 OBD_FREE(data2, sizeof(*data2));
1026 /* drop all taken locks */
1028 if (lockh[i].cookie)
1029 ldlm_lock_decref(lockh + i, lockmode);
1030 lockh[i].cookie = 0;
1035 int lmv_enqueue(struct obd_export *exp, int lock_type,
1036 struct lookup_intent *it, int lock_mode,
1037 struct mdc_op_data *data, struct lustre_handle *lockh,
1038 void *lmm, int lmmsize, ldlm_completion_callback cb_compl,
1039 ldlm_blocking_callback cb_blocking, void *cb_data)
1041 struct obd_device *obd = exp->exp_obd;
1042 struct lmv_obd *lmv = &obd->u.lmv;
1043 struct lmv_obj *obj;
1047 rc = lmv_check_connect(obd);
1051 if (data->mea1 && it->it_op == IT_UNLINK) {
1052 rc = lmv_enqueue_slaves(exp, lock_type, it, lock_mode,
1053 data, lockh, lmm, lmmsize,
1054 cb_compl, cb_blocking, cb_data);
1058 if (data->namelen) {
1059 obj = lmv_grab_obj(obd, &data->id1);
1061 /* directory is splitted. look for right mds for this
1063 mds = raw_name2idx(obj->hashtype, obj->objcount,
1064 (char *)data->name, data->namelen);
1065 data->id1 = obj->objs[mds].id;
1069 CDEBUG(D_OTHER, "ENQUEUE '%s' on "DLID4"\n", LL_IT2STR(it),
1072 rc = md_enqueue(lmv->tgts[id_group(&data->id1)].ltd_exp,
1073 lock_type, it, lock_mode, data, lockh, lmm,
1074 lmmsize, cb_compl, cb_blocking, cb_data);
1078 int lmv_getattr_lock(struct obd_export *exp, struct lustre_id *id,
1079 char *filename, int namelen, __u64 valid,
1080 unsigned int ea_size, struct ptlrpc_request **request)
1082 int rc, mds = id_group(id), loop = 0;
1083 struct obd_device *obd = exp->exp_obd;
1084 struct lmv_obd *lmv = &obd->u.lmv;
1085 struct lustre_id rid = *id;
1086 struct mds_body *body;
1087 struct lmv_obj *obj;
1090 rc = lmv_check_connect(obd);
1094 LASSERT(++loop <= 2);
1095 obj = lmv_grab_obj(obd, id);
1097 /* directory is splitted. look for right mds for this name */
1098 mds = raw_name2idx(obj->hashtype, obj->objcount,
1099 filename, namelen - 1);
1100 rid = obj->objs[mds].id;
1104 CDEBUG(D_OTHER, "getattr_lock for %*s on "DLID4" -> "DLID4"\n",
1105 namelen, filename, OLID4(id), OLID4(&rid));
1107 rc = md_getattr_lock(lmv->tgts[id_group(&rid)].ltd_exp, &rid,
1108 filename, namelen, (valid | OBD_MD_FID),
1112 * this could be cross-node reference. in this case all we have
1113 * right now is lustre_id triple. we'd like to find other
1116 body = lustre_msg_buf((*request)->rq_repmsg, 0, sizeof(*body));
1117 LASSERT(body != NULL);
1118 LASSERT((body->valid & OBD_MD_FID) != 0);
1120 if (body->valid & OBD_MD_MDS) {
1121 struct ptlrpc_request *req = NULL;
1124 CDEBUG(D_OTHER, "request attrs for "DLID4"\n", OLID4(&rid));
1126 rc = md_getattr_lock(lmv->tgts[id_group(&rid)].ltd_exp,
1127 &rid, NULL, 1, valid, ea_size, &req);
1128 ptlrpc_req_finished(*request);
1131 } else if (rc == -ERESTART) {
1132 /* directory got splitted. time to update local object and
1133 * repeat the request with proper MDS */
1134 rc = lmv_get_mea_and_update_object(exp, &rid);
1136 ptlrpc_req_finished(*request);
1144 * llite passes id of an target inode in data->id1 and id of directory in
1147 int lmv_link(struct obd_export *exp, struct mdc_op_data *data,
1148 struct ptlrpc_request **request)
1150 struct obd_device *obd = exp->exp_obd;
1151 struct lmv_obd *lmv = &obd->u.lmv;
1152 struct lmv_obj *obj;
1156 rc = lmv_check_connect(obd);
1160 if (data->namelen != 0) {
1161 /* usual link request */
1162 obj = lmv_grab_obj(obd, &data->id1);
1164 rc = raw_name2idx(obj->hashtype, obj->objcount,
1165 data->name, data->namelen);
1166 data->id1 = obj->objs[rc].id;
1170 CDEBUG(D_OTHER,"link "DLID4":%*s to "DLID4"\n",
1171 OLID4(&data->id2), data->namelen, data->name,
1174 /* request from MDS to acquire i_links for inode by id1 */
1175 CDEBUG(D_OTHER, "inc i_nlinks for "DLID4"\n",
1179 rc = md_link(lmv->tgts[id_group(&data->id1)].ltd_exp,
1184 int lmv_rename(struct obd_export *exp, struct mdc_op_data *data,
1185 const char *old, int oldlen, const char *new, int newlen,
1186 struct ptlrpc_request **request)
1188 struct obd_device *obd = exp->exp_obd;
1189 struct lmv_obd *lmv = &obd->u.lmv;
1190 struct lmv_obj *obj;
1194 CDEBUG(D_OTHER, "rename %*s in "DLID4" to %*s in "DLID4"\n",
1195 oldlen, old, OLID4(&data->id1), newlen, new,
1198 rc = lmv_check_connect(obd);
1204 * MDS with old dir entry is asking another MDS to create name
1208 "create %*s(%d/%d) in "DLID4" pointing "
1209 "to "DLID4"\n", newlen, new, oldlen, newlen,
1210 OLID4(&data->id2), OLID4(&data->id1));
1212 mds = id_group(&data->id2);
1215 * target directory can be splitted, sowe should forward request
1218 obj = lmv_grab_obj(obd, &data->id2);
1220 mds = raw_name2idx(obj->hashtype, obj->objcount,
1221 (char *)new, newlen);
1222 data->id2 = obj->objs[mds].id;
1223 CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n", mds,
1230 obj = lmv_grab_obj(obd, &data->id1);
1233 * directory is already splitted, so we have to forward request
1236 mds = raw_name2idx(obj->hashtype, obj->objcount,
1237 (char *)old, oldlen);
1238 data->id1 = obj->objs[mds].id;
1239 CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n", mds,
1244 obj = lmv_grab_obj(obd, &data->id2);
1247 * directory is already splitted, so we have to forward request
1250 mds = raw_name2idx(obj->hashtype, obj->objcount,
1251 (char *)new, newlen);
1253 data->id2 = obj->objs[mds].id;
1254 CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n", mds,
1259 mds = id_group(&data->id1);
1262 if (id_group(&data->id1) != id_group(&data->id2)) {
1263 CDEBUG(D_OTHER,"cross-node rename "DLID4"/%*s to "DLID4"/%*s\n",
1264 OLID4(&data->id1), oldlen, old, OLID4(&data->id2),
1268 rc = md_rename(lmv->tgts[mds].ltd_exp, data, old, oldlen,
1269 new, newlen, request);
1273 int lmv_setattr(struct obd_export *exp, struct mdc_op_data *data,
1274 struct iattr *iattr, void *ea, int ealen, void *ea2,
1275 int ea2len, struct ptlrpc_request **request)
1277 struct obd_device *obd = exp->exp_obd;
1278 struct lmv_obd *lmv = &obd->u.lmv;
1279 struct ptlrpc_request *req;
1280 struct mds_body *body;
1281 struct lmv_obj *obj;
1285 rc = lmv_check_connect(obd);
1289 obj = lmv_grab_obj(obd, &data->id1);
1291 CDEBUG(D_OTHER, "SETATTR for "DLID4", valid 0x%x%s\n",
1292 OLID4(&data->id1), iattr->ia_valid, obj ? ", splitted" : "");
1295 for (i = 0; i < obj->objcount; i++) {
1296 data->id1 = obj->objs[i].id;
1298 rc = md_setattr(lmv->tgts[id_group(&data->id1)].ltd_exp,
1299 data, iattr, ea, ealen, ea2, ea2len, &req);
1301 if (id_equal_fid(&obj->id, &obj->objs[i].id)) {
1303 * this is master object and this request should
1304 * be returned back to llite.
1308 ptlrpc_req_finished(req);
1316 LASSERT(id_group(&data->id1) < lmv->desc.ld_tgt_count);
1317 rc = md_setattr(lmv->tgts[id_group(&data->id1)].ltd_exp,
1318 data, iattr, ea, ealen, ea2, ea2len, request);
1320 body = lustre_msg_buf((*request)->rq_repmsg, 0,
1322 LASSERT(body != NULL);
1323 LASSERT((body->valid & OBD_MD_FID) != 0);
1324 LASSERT(id_group(&body->id1) == id_group(&data->id1));
1330 int lmv_sync(struct obd_export *exp, struct lustre_id *id,
1331 struct ptlrpc_request **request)
1333 struct obd_device *obd = exp->exp_obd;
1334 struct lmv_obd *lmv = &obd->u.lmv;
1338 rc = lmv_check_connect(obd);
1342 rc = md_sync(lmv->tgts[id_group(id)].ltd_exp,
1347 int lmv_dirobj_blocking_ast(struct ldlm_lock *lock,
1348 struct ldlm_lock_desc *desc,
1349 void *data, int flag)
1351 struct lustre_handle lockh;
1352 struct lmv_obj *obj;
1357 case LDLM_CB_BLOCKING:
1358 ldlm_lock2handle(lock, &lockh);
1359 rc = ldlm_cli_cancel(&lockh);
1361 CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
1365 case LDLM_CB_CANCELING:
1366 /* time to drop cached attrs for dirobj */
1367 obj = lock->l_ast_data;
1369 CDEBUG(D_OTHER, "cancel %s on "LPU64"/"LPU64
1370 ", master "DLID4"\n",
1371 lock->l_resource->lr_name.name[3] == 1 ?
1372 "LOOKUP" : "UPDATE",
1373 lock->l_resource->lr_name.name[0],
1374 lock->l_resource->lr_name.name[1],
1385 void lmv_remove_dots(struct page *page)
1387 unsigned limit = PAGE_CACHE_SIZE;
1388 char *kaddr = page_address(page);
1389 struct ext2_dir_entry_2 *p;
1390 unsigned offs, rec_len;
1392 for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
1393 p = (struct ext2_dir_entry_2 *)(kaddr + offs);
1394 rec_len = le16_to_cpu(p->rec_len);
1396 if ((p->name_len == 1 && p->name[0] == '.') ||
1397 (p->name_len == 2 && p->name[0] == '.' && p->name[1] == '.'))
1402 int lmv_readpage(struct obd_export *exp, struct lustre_id *id,
1403 __u64 offset, struct page *page,
1404 struct ptlrpc_request **request)
1406 struct obd_device *obd = exp->exp_obd;
1407 struct lmv_obd *lmv = &obd->u.lmv;
1408 struct lustre_id rid = *id;
1409 struct lmv_obj *obj;
1413 #warning "we need well-desgined readdir() implementation"
1414 rc = lmv_check_connect(obd);
1418 LASSERT(id_group(id) < lmv->desc.ld_tgt_count);
1419 CDEBUG(D_OTHER, "READPAGE at %llu from "DLID4"\n",
1420 offset, OLID4(&rid));
1422 obj = lmv_grab_obj(obd, id);
1426 /* find dirobj containing page with requested offset. */
1427 for (i = 0; i < obj->objcount; i++) {
1428 if (offset < obj->objs[i].size)
1430 offset -= obj->objs[i].size;
1432 rid = obj->objs[i].id;
1434 lmv_unlock_obj(obj);
1437 CDEBUG(D_OTHER, "forward to "DLID4" with offset %lu\n",
1438 OLID4(&rid), (unsigned long)offset);
1440 rc = md_readpage(lmv->tgts[id_group(&rid)].ltd_exp, &rid,
1441 offset, page, request);
1443 if (rc == 0 && !id_equal_fid(&rid, id))
1444 /* this page isn't from master object. To avoid "." and ".."
1445 * duplication in directory, we have to remove them from all
1447 lmv_remove_dots(page);
1452 int lmv_unlink_slaves(struct obd_export *exp, struct mdc_op_data *data,
1453 struct ptlrpc_request **req)
1455 struct obd_device *obd = exp->exp_obd;
1456 struct lmv_obd *lmv = &obd->u.lmv;
1457 struct mea *mea = data->mea1;
1458 struct mdc_op_data *data2;
1462 OBD_ALLOC(data2, sizeof(*data2));
1466 LASSERT(mea != NULL);
1467 for (i = 0; i < mea->mea_count; i++) {
1468 memset(data2, 0, sizeof(*data2));
1469 data2->id1 = mea->mea_ids[i];
1470 data2->create_mode = MDS_MODE_DONT_LOCK | S_IFDIR;
1472 if (lmv->tgts[id_group(&data2->id1)].ltd_exp == NULL)
1475 rc = md_unlink(lmv->tgts[id_group(&data2->id1)].ltd_exp,
1478 CDEBUG(D_OTHER, "unlink slave "DLID4" -> %d\n",
1479 OLID4(&mea->mea_ids[i]), rc);
1482 ptlrpc_req_finished(*req);
1488 OBD_FREE(data2, sizeof(*data2));
1492 int lmv_delete_inode(struct obd_export *exp, struct lustre_id *id)
1497 if (lmv_delete_obj(exp, id)) {
1498 CDEBUG(D_OTHER, "lmv object "DLID4" is destroyed.\n",
1504 int lmv_unlink(struct obd_export *exp, struct mdc_op_data *data,
1505 struct ptlrpc_request **request)
1507 struct obd_device *obd = exp->exp_obd;
1508 struct lmv_obd *lmv = &obd->u.lmv;
1512 rc = lmv_check_connect(obd);
1516 if (data->namelen == 0 && data->mea1 != NULL) {
1517 /* mds asks to remove slave objects */
1518 rc = lmv_unlink_slaves(exp, data, request);
1522 if (data->namelen != 0) {
1523 struct lmv_obj *obj;
1525 obj = lmv_grab_obj(obd, &data->id1);
1527 i = raw_name2idx(obj->hashtype, obj->objcount,
1528 data->name, data->namelen);
1529 data->id1 = obj->objs[i].id;
1532 CDEBUG(D_OTHER, "unlink '%*s' in "DLID4" -> %u\n",
1533 data->namelen, data->name, OLID4(&data->id1),
1536 CDEBUG(D_OTHER, "drop i_nlink on "DLID4"\n",
1539 rc = md_unlink(lmv->tgts[id_group(&data->id1)].ltd_exp,
1544 struct obd_device *lmv_get_real_obd(struct obd_export *exp,
1545 struct lustre_id *id)
1547 struct obd_device *obd = exp->exp_obd;
1548 struct lmv_obd *lmv = &obd->u.lmv;
1552 rc = lmv_check_connect(obd);
1554 RETURN(ERR_PTR(rc));
1555 obd = lmv->tgts[id_group(id)].ltd_exp->exp_obd;
1561 int lmv_init_ea_size(struct obd_export *exp, int easize,
1564 struct obd_device *obd = exp->exp_obd;
1565 struct lmv_obd *lmv = &obd->u.lmv;
1566 int i, rc = 0, change = 0;
1569 if (lmv->max_easize < easize) {
1570 lmv->max_easize = easize;
1573 if (lmv->max_cookiesize < cookiesize) {
1574 lmv->max_cookiesize = cookiesize;
1580 if (lmv->connected == 0)
1583 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1584 if (lmv->tgts[i].ltd_exp == NULL) {
1585 CWARN("%s: NULL export for %d\n", obd->obd_name, i);
1589 rc = obd_init_ea_size(lmv->tgts[i].ltd_exp, easize, cookiesize);
1591 CERROR("obd_init_ea_size() failed on MDT target %d, "
1592 "error %d.\n", i, rc);
1599 int lmv_obd_create_single(struct obd_export *exp, struct obdo *oa,
1600 struct lov_stripe_md **ea, struct obd_trans_info *oti)
1602 struct obd_device *obd = exp->exp_obd;
1603 struct lmv_obd *lmv = &obd->u.lmv;
1604 struct lov_stripe_md obj_md;
1605 struct lov_stripe_md *obj_mdp = &obj_md;
1609 LASSERT(ea == NULL);
1610 LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
1612 rc = obd_create(lmv->tgts[oa->o_mds].ltd_exp,
1618 int lmv_getready(struct obd_export *exp)
1620 struct obd_device *obd = exp->exp_obd;
1624 rc = lmv_check_connect(obd);
1629 * to be called from MDS only. @oa should have correct store cookie and o_fid
1630 * values for "master" object, as it will be used.
1632 int lmv_obd_create(struct obd_export *exp, struct obdo *oa,
1633 struct lov_stripe_md **ea, struct obd_trans_info *oti)
1635 struct obd_device *obd = exp->exp_obd;
1636 struct lmv_obd *lmv = &obd->u.lmv;
1637 struct lustre_id mid;
1642 rc = lmv_check_connect(obd);
1646 LASSERT(oa != NULL);
1649 rc = lmv_obd_create_single(exp, oa, NULL, oti);
1651 CERROR("Can't create object, rc = %d\n", rc);
1656 rc = obd_alloc_diskmd(exp, (struct lov_mds_md **)ea);
1658 CERROR("obd_alloc_diskmd() failed, error %d\n",
1669 * here we should take care about splitted dir, so store cookie and fid
1670 * for "master" object should already be allocated and passed in @oa.
1672 LASSERT(oa->o_id != 0);
1673 LASSERT(oa->o_fid != 0);
1675 /* save "master" object id */
1678 mea = (struct mea *)*ea;
1679 mea->mea_master = -1;
1680 mea->mea_magic = MEA_MAGIC_ALL_CHARS;
1682 if (!mea->mea_count || mea->mea_count > lmv->desc.ld_tgt_count)
1683 mea->mea_count = lmv->desc.ld_tgt_count;
1685 for (i = 0, c = 0; c < mea->mea_count && i < lmv->desc.ld_tgt_count; i++) {
1686 struct lov_stripe_md obj_md;
1687 struct lov_stripe_md *obj_mdp = &obj_md;
1689 if (lmv->tgts[i].ltd_exp == NULL) {
1690 /* this is "master" MDS */
1691 mea->mea_master = i;
1692 mea->mea_ids[c] = mid;
1698 * "master" MDS should always be part of stripped dir,
1701 if (mea->mea_master == -1 && c == mea->mea_count - 1)
1704 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLTYPE | OBD_MD_FLMODE |
1705 OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLID;
1707 rc = obd_create(lmv->tgts[c].ltd_exp, oa, &obj_mdp, oti);
1709 CERROR("obd_create() failed on MDT target %d, "
1710 "error %d\n", c, rc);
1714 CDEBUG(D_OTHER, "dirobj at mds %d: "LPU64"/%u\n",
1715 i, oa->o_id, oa->o_generation);
1719 * here, when object is created (or it is master and was passed
1720 * from caller) on desired MDS we save its fid to local mea_ids.
1725 * store cookie should be defined here for both cases (master
1726 * object and not master), because master is already created.
1730 /* fill mea by store cookie and fid */
1731 obdo2id(&mea->mea_ids[c], oa);
1734 LASSERT(c == mea->mea_count);
1736 CDEBUG(D_OTHER, "%d dirobjects created\n",
1737 (int)mea->mea_count);
1742 static int lmv_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
1743 struct obd_device *tgt, int count,
1744 struct llog_catid *logid)
1746 struct llog_ctxt *ctxt;
1750 rc = obd_llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
1753 ctxt = llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT);
1754 ctxt->loc_imp = tgt->u.cli.cl_import;
1760 static int lmv_llog_finish(struct obd_device *obd,
1761 struct obd_llogs *llogs, int count)
1766 rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT));
1770 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
1771 void *key, __u32 *vallen, void *val)
1773 struct obd_device *obd;
1774 struct lmv_obd *lmv;
1778 obd = class_exp2obd(exp);
1780 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1781 exp->exp_handle.h_cookie);
1786 if (keylen == 6 && memcmp(key, "mdsize", 6) == 0) {
1787 __u32 *mdsize = val;
1788 *vallen = sizeof(__u32);
1789 *mdsize = sizeof(struct lustre_id) * lmv->desc.ld_tgt_count
1790 + sizeof(struct mea);
1792 } else if (keylen == 6 && memcmp(key, "mdsnum", 6) == 0) {
1793 struct obd_uuid *cluuid = &lmv->cluuid;
1794 struct lmv_tgt_desc *tgts;
1795 __u32 *mdsnum = val;
1798 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
1799 if (obd_uuid_equals(&tgts->uuid, cluuid)) {
1800 *vallen = sizeof(__u32);
1806 } else if (keylen == 6 && memcmp(key, "rootid", 6) == 0) {
1807 /* getting rootid from first MDS. */
1808 rc = obd_get_info(lmv->tgts[0].ltd_exp, keylen, key,
1811 } else if (keylen >= strlen("lmvdesc") && strcmp(key, "lmvdesc") == 0) {
1812 struct lmv_desc *desc_ret = val;
1813 *desc_ret = lmv->desc;
1815 } else if (keylen == strlen("remote_flag") &&
1816 !strcmp(key, "remote_flag")) {
1817 struct lmv_tgt_desc *tgts;
1820 LASSERT(*vallen == sizeof(__u32));
1821 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count;
1824 /* all tgts should be connected when this get called. */
1825 if (!tgts || !tgts->ltd_exp) {
1826 CERROR("target not setup?\n");
1830 if (!obd_get_info(tgts->ltd_exp, keylen, key,
1837 CDEBUG(D_IOCTL, "invalid key\n");
1841 int lmv_set_info(struct obd_export *exp, obd_count keylen,
1842 void *key, obd_count vallen, void *val)
1844 struct obd_device *obd;
1845 struct lmv_obd *lmv;
1848 obd = class_exp2obd(exp);
1850 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1851 exp->exp_handle.h_cookie);
1856 if (keylen >= strlen("inter_mds") && strcmp(key, "inter_mds") == 0) {
1857 lmv->server_timeout = 1;
1858 lmv_set_timeouts(obd);
1862 /* maybe this could be default */
1863 if ((keylen == strlen("sec") && strcmp(key, "sec") == 0) ||
1864 (keylen == strlen("nllu") && strcmp(key, "nllu") == 0)) {
1865 struct lmv_tgt_desc *tgt;
1866 struct obd_export *exp;
1869 spin_lock(&lmv->lmv_lock);
1870 for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count;
1873 /* during setup time the connections to mdc might
1874 * haven't been established.
1877 struct obd_device *tgt_obd;
1879 tgt_obd = class_find_client_obd(&tgt->uuid,
1883 CERROR("can't set info %s, "
1884 "device %s not attached?\n",
1885 (char *) key, tgt->uuid.uuid);
1889 exp = tgt_obd->obd_self_export;
1892 err = obd_set_info(exp, keylen, key, vallen, val);
1896 spin_unlock(&lmv->lmv_lock);
1904 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
1905 struct lov_stripe_md *lsm)
1907 struct obd_device *obd = class_exp2obd(exp);
1908 struct lmv_obd *lmv = &obd->u.lmv;
1909 struct mea *meap, *lsmp;
1913 mea_size = (sizeof(struct lustre_id) *
1914 lmv->desc.ld_tgt_count) + sizeof(struct mea);
1918 if (*lmmp && !lsm) {
1919 OBD_FREE(*lmmp, mea_size);
1924 if (*lmmp == NULL) {
1925 OBD_ALLOC(*lmmp, mea_size);
1933 lsmp = (struct mea *)lsm;
1934 meap = (struct mea *)*lmmp;
1936 if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
1937 lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
1940 meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
1941 meap->mea_count = cpu_to_le32(lsmp->mea_count);
1942 meap->mea_master = cpu_to_le32(lsmp->mea_master);
1944 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1945 meap->mea_ids[i] = meap->mea_ids[i];
1946 id_cpu_to_le(&meap->mea_ids[i]);
1952 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
1953 struct lov_mds_md *lmm, int lmm_size)
1955 struct obd_device *obd = class_exp2obd(exp);
1956 struct mea **tmea = (struct mea **)lsmp;
1957 struct mea *mea = (struct mea *)lmm;
1958 struct lmv_obd *lmv = &obd->u.lmv;
1959 int mea_size, i, rc = 0;
1963 mea_size = sizeof(struct lustre_id) *
1964 lmv->desc.ld_tgt_count + sizeof(struct mea);
1969 if (*lsmp != NULL && lmm == NULL) {
1970 OBD_FREE(*tmea, mea_size);
1974 LASSERT(mea_size == lmm_size);
1976 OBD_ALLOC(*tmea, mea_size);
1983 if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
1984 mea->mea_magic == MEA_MAGIC_ALL_CHARS)
1986 magic = le32_to_cpu(mea->mea_magic);
1988 struct mea_old *old = (struct mea_old *)lmm;
1990 mea_size = sizeof(struct lustre_id) * old->mea_count +
1991 sizeof(struct mea_old);
1993 if (old->mea_count > 256 || old->mea_master > 256 ||
1994 lmm_size < mea_size || old->mea_master > old->mea_count) {
1995 CWARN("bad MEA: count %u, master %u, size %u\n",
1996 old->mea_count, old->mea_master, mea_size);
1997 GOTO(out_free_mea, rc = -EINVAL);
1999 magic = MEA_MAGIC_LAST_CHAR;
2002 (*tmea)->mea_magic = magic;
2003 (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
2004 (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
2006 for (i = 0; i < (*tmea)->mea_count; i++) {
2007 (*tmea)->mea_ids[i] = mea->mea_ids[i];
2008 id_le_to_cpu(&(*tmea)->mea_ids[i]);
2013 OBD_FREE(*tmea, mea_size);
2017 int lmv_brw(int rw, struct obd_export *exp, struct obdo *oa,
2018 struct lov_stripe_md *ea, obd_count oa_bufs,
2019 struct brw_page *pgarr, struct obd_trans_info *oti)
2021 struct obd_device *obd = exp->exp_obd;
2022 struct lmv_obd *lmv = &obd->u.lmv;
2023 struct mea *mea = (struct mea *) ea;
2026 LASSERT(oa != NULL);
2027 LASSERT(ea != NULL);
2028 LASSERT(pgarr != NULL);
2029 LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
2031 oa->o_gr = id_gen(&mea->mea_ids[oa->o_mds]);
2032 oa->o_id = id_ino(&mea->mea_ids[oa->o_mds]);
2033 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
2035 err = obd_brw(rw, lmv->tgts[oa->o_mds].ltd_exp,
2036 oa, NULL, oa_bufs, pgarr, oti);
2040 struct obd_ops lmv_obd_ops = {
2041 .o_owner = THIS_MODULE,
2042 .o_attach = lmv_attach,
2043 .o_detach = lmv_detach,
2044 .o_setup = lmv_setup,
2045 .o_cleanup = lmv_cleanup,
2046 .o_connect = lmv_connect,
2047 .o_disconnect = lmv_disconnect,
2048 .o_statfs = lmv_statfs,
2049 .o_llog_init = lmv_llog_init,
2050 .o_llog_finish = lmv_llog_finish,
2051 .o_get_info = lmv_get_info,
2052 .o_set_info = lmv_set_info,
2053 .o_create = lmv_obd_create,
2054 .o_packmd = lmv_packmd,
2055 .o_unpackmd = lmv_unpackmd,
2057 .o_init_ea_size = lmv_init_ea_size,
2058 .o_notify = lmv_notify,
2059 .o_iocontrol = lmv_iocontrol,
2060 .o_getready = lmv_getready,
2063 struct md_ops lmv_md_ops = {
2064 .m_getstatus = lmv_getstatus,
2065 .m_getattr = lmv_getattr,
2066 .m_change_cbdata = lmv_change_cbdata,
2067 .m_change_cbdata_name = lmv_change_cbdata_name,
2068 .m_close = lmv_close,
2069 .m_create = lmv_create,
2070 .m_done_writing = lmv_done_writing,
2071 .m_enqueue = lmv_enqueue,
2072 .m_getattr_lock = lmv_getattr_lock,
2073 .m_intent_lock = lmv_intent_lock,
2075 .m_rename = lmv_rename,
2076 .m_setattr = lmv_setattr,
2078 .m_readpage = lmv_readpage,
2079 .m_unlink = lmv_unlink,
2080 .m_get_real_obd = lmv_get_real_obd,
2081 .m_valid_attrs = lmv_valid_attrs,
2082 .m_delete_inode = lmv_delete_inode,
2085 int __init lmv_init(void)
2087 struct lprocfs_static_vars lvars;
2090 obj_cache = kmem_cache_create("lmv_objects",
2091 sizeof(struct lmv_obj),
2094 CERROR("error allocating lmv objects cache\n");
2098 lprocfs_init_vars(lmv, &lvars);
2099 rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
2101 OBD_LMV_DEVICENAME);
2103 kmem_cache_destroy(obj_cache);
2109 static void lmv_exit(void)
2111 class_unregister_type(OBD_LMV_DEVICENAME);
2113 LASSERTF(kmem_cache_destroy(obj_cache) == 0,
2114 "can't free lmv objects cache, %d object(s)"
2115 "still in use\n", atomic_read(&obj_cache_count));
2118 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2119 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
2120 MODULE_LICENSE("GPL");
2122 module_init(lmv_init);
2123 module_exit(lmv_exit);