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)
645 rc = obd_statfs(lmv->tgts[i].ltd_exp->exp_obd, temp, max_age);
647 CERROR("can't stat MDS #%d (%s), error %d\n", i,
648 lmv->tgts[i].ltd_exp->exp_obd->obd_name,
650 GOTO(out_free_temp, rc);
653 memcpy(osfs, temp, sizeof(*temp));
655 osfs->os_bavail += temp->os_bavail;
656 osfs->os_blocks += temp->os_blocks;
657 osfs->os_ffree += temp->os_ffree;
658 osfs->os_files += temp->os_files;
664 OBD_FREE(temp, sizeof(*temp));
668 static int lmv_getstatus(struct obd_export *exp, struct lustre_id *id)
670 struct obd_device *obd = exp->exp_obd;
671 struct lmv_obd *lmv = &obd->u.lmv;
675 rc = lmv_check_connect(obd);
679 rc = md_getstatus(lmv->tgts[0].ltd_exp, id);
685 static int lmv_getattr(struct obd_export *exp, struct lustre_id *id,
686 __u64 valid, const char *ea_name, int ea_namelen,
687 unsigned int ea_size, struct ptlrpc_request **request)
689 struct obd_device *obd = exp->exp_obd;
690 struct lmv_obd *lmv = &obd->u.lmv;
691 int rc, i = id_group(id);
695 rc = lmv_check_connect(obd);
699 LASSERT(i < lmv->desc.ld_tgt_count);
702 rc = md_getattr(lmv->tgts[i].ltd_exp, id, valid,
703 ea_name, ea_namelen, ea_size, request);
707 obj = lmv_grab_obj(obd, id);
709 CDEBUG(D_OTHER, "GETATTR for "DLID4" %s\n",
710 OLID4(id), obj ? "(splitted)" : "");
713 * if object is splitted, then we loop over all the slaves and gather
714 * size attribute. In ideal world we would have to gather also mds field
715 * from all slaves, as object is spread over the cluster and this is
716 * definitely interesting information and it is not good to loss it,
720 struct mds_body *body;
722 if (*request == NULL) {
727 body = lustre_msg_buf((*request)->rq_repmsg, 0,
729 LASSERT(body != NULL);
733 for (i = 0; i < obj->objcount; i++) {
735 if (lmv->tgts[i].ltd_exp == NULL) {
736 CWARN("%s: NULL export for %d\n",
741 /* skip master obj. */
742 if (id_equal_fid(&obj->id, &obj->objs[i].id))
745 body->size += obj->objs[i].size;
755 static int lmv_change_cbdata(struct obd_export *exp,
756 struct lustre_id *id,
760 struct obd_device *obd = exp->exp_obd;
761 struct lmv_obd *lmv = &obd->u.lmv;
765 rc = lmv_check_connect(obd);
769 CDEBUG(D_OTHER, "CBDATA for "DLID4"\n", OLID4(id));
770 LASSERT(id_group(id) < lmv->desc.ld_tgt_count);
772 rc = md_change_cbdata(lmv->tgts[id_group(id)].ltd_exp,
778 static int lmv_change_cbdata_name(struct obd_export *exp,
779 struct lustre_id *pid,
781 struct lustre_id *cid,
785 struct obd_device *obd = exp->exp_obd;
786 struct lmv_obd *lmv = &obd->u.lmv;
787 struct lustre_id rcid = *cid;
792 rc = lmv_check_connect(obd);
796 LASSERT(id_group(pid) < lmv->desc.ld_tgt_count);
797 LASSERT(id_group(cid) < lmv->desc.ld_tgt_count);
799 CDEBUG(D_OTHER, "CBDATA for "DLID4":%*s -> "DLID4"\n",
800 OLID4(pid), len, name, OLID4(cid));
802 /* this is default mds for directory name belongs to. */
804 obj = lmv_grab_obj(obd, pid);
806 /* directory is splitted. look for right mds for this name. */
807 mds = raw_name2idx(obj->hashtype, obj->objcount, name, len);
808 rcid = obj->objs[mds].id;
809 mds = id_group(&rcid);
812 rc = md_change_cbdata(lmv->tgts[mds].ltd_exp, &rcid, it, data);
816 static int lmv_valid_attrs(struct obd_export *exp, struct lustre_id *id)
818 struct obd_device *obd = exp->exp_obd;
819 struct lmv_obd *lmv = &obd->u.lmv;
823 rc = lmv_check_connect(obd);
827 CDEBUG(D_OTHER, "validate "DLID4"\n", OLID4(id));
828 LASSERT(id_group(id) < lmv->desc.ld_tgt_count);
829 rc = md_valid_attrs(lmv->tgts[id_group(id)].ltd_exp, id);
833 int lmv_close(struct obd_export *exp, struct obdo *obdo,
834 struct obd_client_handle *och,
835 struct ptlrpc_request **request)
837 struct obd_device *obd = exp->exp_obd;
838 struct lmv_obd *lmv = &obd->u.lmv;
839 int rc, i = obdo->o_mds;
842 rc = lmv_check_connect(obd);
846 LASSERT(i < lmv->desc.ld_tgt_count);
847 CDEBUG(D_OTHER, "CLOSE %lu/%lu/%lu\n", (unsigned long)obdo->o_mds,
848 (unsigned long)obdo->o_id, (unsigned long)obdo->o_generation);
849 rc = md_close(lmv->tgts[i].ltd_exp, obdo, och, request);
853 int lmv_get_mea_and_update_object(struct obd_export *exp,
854 struct lustre_id *id)
856 struct obd_device *obd = exp->exp_obd;
857 struct lmv_obd *lmv = &obd->u.lmv;
858 struct ptlrpc_request *req = NULL;
866 mealen = MEA_SIZE_LMV(lmv);
868 valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA | OBD_MD_MEA;
870 /* time to update mea of parent id */
871 rc = md_getattr(lmv->tgts[id_group(id)].ltd_exp,
872 id, valid, NULL, 0, mealen, &req);
874 CERROR("md_getattr() failed, error %d\n", rc);
878 rc = mdc_req2lustre_md(exp, req, 0, NULL, &md);
880 CERROR("mdc_req2lustre_md() failed, error %d\n", rc);
885 GOTO(cleanup, rc = -ENODATA);
887 obj = lmv_create_obj(exp, id, md.mea);
892 obd_free_memmd(exp, (struct lov_stripe_md **)&md.mea);
897 ptlrpc_req_finished(req);
901 int lmv_create(struct obd_export *exp, struct mdc_op_data *op_data,
902 const void *data, int datalen, int mode, __u32 uid,
903 __u32 gid, __u64 rdev, struct ptlrpc_request **request)
905 struct obd_device *obd = exp->exp_obd;
906 struct lmv_obd *lmv = &obd->u.lmv;
907 struct mds_body *body;
909 int rc, mds, loop = 0;
912 rc = lmv_check_connect(obd);
916 if (!lmv->desc.ld_active_tgt_count)
919 LASSERT(++loop <= 2);
920 obj = lmv_grab_obj(obd, &op_data->id1);
922 mds = raw_name2idx(obj->hashtype, obj->objcount,
923 op_data->name, op_data->namelen);
924 op_data->id1 = obj->objs[mds].id;
928 CDEBUG(D_OTHER, "CREATE '%*s' on "DLID4"\n", op_data->namelen,
929 op_data->name, OLID4(&op_data->id1));
931 rc = md_create(lmv->tgts[id_group(&op_data->id1)].ltd_exp,
932 op_data, data, datalen, mode, uid, gid, rdev,
935 if (*request == NULL)
938 body = lustre_msg_buf((*request)->rq_repmsg, 0,
943 CDEBUG(D_OTHER, "created. "DLID4"\n", OLID4(&op_data->id1));
944 } else if (rc == -ERESTART) {
946 * directory got splitted. time to update local object and
947 * repeat the request with proper MDS.
949 rc = lmv_get_mea_and_update_object(exp, &op_data->id1);
951 ptlrpc_req_finished(*request);
958 int lmv_done_writing(struct obd_export *exp, struct obdo *obdo)
960 struct obd_device *obd = exp->exp_obd;
961 struct lmv_obd *lmv = &obd->u.lmv;
965 rc = lmv_check_connect(obd);
969 /* FIXME: choose right MDC here */
970 CWARN("this method isn't implemented yet\n");
971 rc = md_done_writing(lmv->tgts[0].ltd_exp, obdo);
975 int lmv_enqueue_slaves(struct obd_export *exp, int locktype,
976 struct lookup_intent *it, int lockmode,
977 struct mdc_op_data *data, struct lustre_handle *lockh,
978 void *lmm, int lmmsize, ldlm_completion_callback cb_compl,
979 ldlm_blocking_callback cb_blocking, void *cb_data)
981 struct obd_device *obd = exp->exp_obd;
982 struct lmv_obd *lmv = &obd->u.lmv;
983 struct mea *mea = data->mea1;
984 struct mdc_op_data *data2;
988 OBD_ALLOC(data2, sizeof(*data2));
992 LASSERT(mea != NULL);
993 for (i = 0; i < mea->mea_count; i++) {
994 memset(data2, 0, sizeof(*data2));
995 data2->id1 = mea->mea_ids[i];
996 mds = id_group(&data2->id1);
998 if (lmv->tgts[mds].ltd_exp == NULL)
1001 rc = md_enqueue(lmv->tgts[mds].ltd_exp, locktype, it,
1002 lockmode, data2, lockh + i, lmm, lmmsize,
1003 cb_compl, cb_blocking, cb_data);
1005 CDEBUG(D_OTHER, "take lock on slave "DLID4" -> %d/%d\n",
1006 OLID4(&mea->mea_ids[i]), rc, LUSTRE_IT(it)->it_status);
1009 if (LUSTRE_IT(it)->it_data) {
1010 struct ptlrpc_request *req;
1011 req = (struct ptlrpc_request *) LUSTRE_IT(it)->it_data;
1012 ptlrpc_req_finished(req);
1015 if (LUSTRE_IT(it)->it_status)
1016 GOTO(cleanup, rc = LUSTRE_IT(it)->it_status);
1019 OBD_FREE(data2, sizeof(*data2));
1022 OBD_FREE(data2, sizeof(*data2));
1024 /* drop all taken locks */
1026 if (lockh[i].cookie)
1027 ldlm_lock_decref(lockh + i, lockmode);
1028 lockh[i].cookie = 0;
1033 int lmv_enqueue(struct obd_export *exp, int lock_type,
1034 struct lookup_intent *it, int lock_mode,
1035 struct mdc_op_data *data, struct lustre_handle *lockh,
1036 void *lmm, int lmmsize, ldlm_completion_callback cb_compl,
1037 ldlm_blocking_callback cb_blocking, void *cb_data)
1039 struct obd_device *obd = exp->exp_obd;
1040 struct lmv_obd *lmv = &obd->u.lmv;
1041 struct lmv_obj *obj;
1045 rc = lmv_check_connect(obd);
1049 if (data->mea1 && it->it_op == IT_UNLINK) {
1050 rc = lmv_enqueue_slaves(exp, lock_type, it, lock_mode,
1051 data, lockh, lmm, lmmsize,
1052 cb_compl, cb_blocking, cb_data);
1056 if (data->namelen) {
1057 obj = lmv_grab_obj(obd, &data->id1);
1059 /* directory is splitted. look for right mds for this
1061 mds = raw_name2idx(obj->hashtype, obj->objcount,
1062 (char *)data->name, data->namelen);
1063 data->id1 = obj->objs[mds].id;
1067 CDEBUG(D_OTHER, "ENQUEUE '%s' on "DLID4"\n", LL_IT2STR(it),
1070 rc = md_enqueue(lmv->tgts[id_group(&data->id1)].ltd_exp,
1071 lock_type, it, lock_mode, data, lockh, lmm,
1072 lmmsize, cb_compl, cb_blocking, cb_data);
1076 int lmv_getattr_lock(struct obd_export *exp, struct lustre_id *id,
1077 char *filename, int namelen, __u64 valid,
1078 unsigned int ea_size, struct ptlrpc_request **request)
1080 int rc, mds = id_group(id), loop = 0;
1081 struct obd_device *obd = exp->exp_obd;
1082 struct lmv_obd *lmv = &obd->u.lmv;
1083 struct lustre_id rid = *id;
1084 struct mds_body *body;
1085 struct lmv_obj *obj;
1088 rc = lmv_check_connect(obd);
1092 LASSERT(++loop <= 2);
1093 obj = lmv_grab_obj(obd, id);
1095 /* directory is splitted. look for right mds for this name */
1096 mds = raw_name2idx(obj->hashtype, obj->objcount,
1097 filename, namelen - 1);
1098 rid = obj->objs[mds].id;
1102 CDEBUG(D_OTHER, "getattr_lock for %*s on "DLID4" -> "DLID4"\n",
1103 namelen, filename, OLID4(id), OLID4(&rid));
1105 rc = md_getattr_lock(lmv->tgts[id_group(&rid)].ltd_exp, &rid,
1106 filename, namelen, (valid | OBD_MD_FID),
1110 * this could be cross-node reference. in this case all we have
1111 * right now is lustre_id triple. we'd like to find other
1114 body = lustre_msg_buf((*request)->rq_repmsg, 0, sizeof(*body));
1115 LASSERT(body != NULL);
1116 LASSERT((body->valid & OBD_MD_FID) != 0);
1118 if (body->valid & OBD_MD_MDS) {
1119 struct ptlrpc_request *req = NULL;
1122 CDEBUG(D_OTHER, "request attrs for "DLID4"\n", OLID4(&rid));
1124 rc = md_getattr_lock(lmv->tgts[id_group(&rid)].ltd_exp,
1125 &rid, NULL, 1, valid, ea_size, &req);
1126 ptlrpc_req_finished(*request);
1129 } else if (rc == -ERESTART) {
1130 /* directory got splitted. time to update local object and
1131 * repeat the request with proper MDS */
1132 rc = lmv_get_mea_and_update_object(exp, &rid);
1134 ptlrpc_req_finished(*request);
1142 * llite passes id of an target inode in data->id1 and id of directory in
1145 int lmv_link(struct obd_export *exp, struct mdc_op_data *data,
1146 struct ptlrpc_request **request)
1148 struct obd_device *obd = exp->exp_obd;
1149 struct lmv_obd *lmv = &obd->u.lmv;
1150 struct lmv_obj *obj;
1154 rc = lmv_check_connect(obd);
1158 if (data->namelen != 0) {
1159 /* usual link request */
1160 obj = lmv_grab_obj(obd, &data->id1);
1162 rc = raw_name2idx(obj->hashtype, obj->objcount,
1163 data->name, data->namelen);
1164 data->id1 = obj->objs[rc].id;
1168 CDEBUG(D_OTHER,"link "DLID4":%*s to "DLID4"\n",
1169 OLID4(&data->id2), data->namelen, data->name,
1172 /* request from MDS to acquire i_links for inode by id1 */
1173 CDEBUG(D_OTHER, "inc i_nlinks for "DLID4"\n",
1177 rc = md_link(lmv->tgts[id_group(&data->id1)].ltd_exp,
1182 int lmv_rename(struct obd_export *exp, struct mdc_op_data *data,
1183 const char *old, int oldlen, const char *new, int newlen,
1184 struct ptlrpc_request **request)
1186 struct obd_device *obd = exp->exp_obd;
1187 struct lmv_obd *lmv = &obd->u.lmv;
1188 struct lmv_obj *obj;
1192 CDEBUG(D_OTHER, "rename %*s in "DLID4" to %*s in "DLID4"\n",
1193 oldlen, old, OLID4(&data->id1), newlen, new,
1196 rc = lmv_check_connect(obd);
1202 * MDS with old dir entry is asking another MDS to create name
1206 "create %*s(%d/%d) in "DLID4" pointing "
1207 "to "DLID4"\n", newlen, new, oldlen, newlen,
1208 OLID4(&data->id2), OLID4(&data->id1));
1210 mds = id_group(&data->id2);
1213 * target directory can be splitted, sowe should forward request
1216 obj = lmv_grab_obj(obd, &data->id2);
1218 mds = raw_name2idx(obj->hashtype, obj->objcount,
1219 (char *)new, newlen);
1220 data->id2 = obj->objs[mds].id;
1221 CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n", mds,
1228 obj = lmv_grab_obj(obd, &data->id1);
1231 * directory is already splitted, so we have to forward request
1234 mds = raw_name2idx(obj->hashtype, obj->objcount,
1235 (char *)old, oldlen);
1236 data->id1 = obj->objs[mds].id;
1237 CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n", mds,
1242 obj = lmv_grab_obj(obd, &data->id2);
1245 * directory is already splitted, so we have to forward request
1248 mds = raw_name2idx(obj->hashtype, obj->objcount,
1249 (char *)new, newlen);
1251 data->id2 = obj->objs[mds].id;
1252 CDEBUG(D_OTHER, "forward to MDS #%u ("DLID4")\n", mds,
1257 mds = id_group(&data->id1);
1260 if (id_group(&data->id1) != id_group(&data->id2)) {
1261 CDEBUG(D_OTHER,"cross-node rename "DLID4"/%*s to "DLID4"/%*s\n",
1262 OLID4(&data->id1), oldlen, old, OLID4(&data->id2),
1266 rc = md_rename(lmv->tgts[mds].ltd_exp, data, old, oldlen,
1267 new, newlen, request);
1271 int lmv_setattr(struct obd_export *exp, struct mdc_op_data *data,
1272 struct iattr *iattr, void *ea, int ealen, void *ea2,
1273 int ea2len, struct ptlrpc_request **request)
1275 struct obd_device *obd = exp->exp_obd;
1276 struct lmv_obd *lmv = &obd->u.lmv;
1277 struct ptlrpc_request *req;
1278 struct mds_body *body;
1279 struct lmv_obj *obj;
1283 rc = lmv_check_connect(obd);
1287 obj = lmv_grab_obj(obd, &data->id1);
1289 CDEBUG(D_OTHER, "SETATTR for "DLID4", valid 0x%x%s\n",
1290 OLID4(&data->id1), iattr->ia_valid, obj ? ", splitted" : "");
1293 for (i = 0; i < obj->objcount; i++) {
1294 data->id1 = obj->objs[i].id;
1296 rc = md_setattr(lmv->tgts[id_group(&data->id1)].ltd_exp,
1297 data, iattr, ea, ealen, ea2, ea2len, &req);
1299 if (id_equal_fid(&obj->id, &obj->objs[i].id)) {
1301 * this is master object and this request should
1302 * be returned back to llite.
1306 ptlrpc_req_finished(req);
1314 LASSERT(id_group(&data->id1) < lmv->desc.ld_tgt_count);
1315 rc = md_setattr(lmv->tgts[id_group(&data->id1)].ltd_exp,
1316 data, iattr, ea, ealen, ea2, ea2len, request);
1318 body = lustre_msg_buf((*request)->rq_repmsg, 0,
1320 LASSERT(body != NULL);
1321 LASSERT((body->valid & OBD_MD_FID) != 0);
1322 LASSERT(id_group(&body->id1) == id_group(&data->id1));
1328 int lmv_sync(struct obd_export *exp, struct lustre_id *id,
1329 struct ptlrpc_request **request)
1331 struct obd_device *obd = exp->exp_obd;
1332 struct lmv_obd *lmv = &obd->u.lmv;
1336 rc = lmv_check_connect(obd);
1340 rc = md_sync(lmv->tgts[id_group(id)].ltd_exp,
1345 int lmv_dirobj_blocking_ast(struct ldlm_lock *lock,
1346 struct ldlm_lock_desc *desc,
1347 void *data, int flag)
1349 struct lustre_handle lockh;
1350 struct lmv_obj *obj;
1355 case LDLM_CB_BLOCKING:
1356 ldlm_lock2handle(lock, &lockh);
1357 rc = ldlm_cli_cancel(&lockh);
1359 CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
1363 case LDLM_CB_CANCELING:
1364 /* time to drop cached attrs for dirobj */
1365 obj = lock->l_ast_data;
1367 CDEBUG(D_OTHER, "cancel %s on "LPU64"/"LPU64
1368 ", master "DLID4"\n",
1369 lock->l_resource->lr_name.name[3] == 1 ?
1370 "LOOKUP" : "UPDATE",
1371 lock->l_resource->lr_name.name[0],
1372 lock->l_resource->lr_name.name[1],
1383 void lmv_remove_dots(struct page *page)
1385 unsigned limit = PAGE_CACHE_SIZE;
1386 char *kaddr = page_address(page);
1387 struct ext2_dir_entry_2 *p;
1388 unsigned offs, rec_len;
1390 for (offs = 0; offs <= limit - EXT2_DIR_REC_LEN(1); offs += rec_len) {
1391 p = (struct ext2_dir_entry_2 *)(kaddr + offs);
1392 rec_len = le16_to_cpu(p->rec_len);
1394 if ((p->name_len == 1 && p->name[0] == '.') ||
1395 (p->name_len == 2 && p->name[0] == '.' && p->name[1] == '.'))
1400 int lmv_readpage(struct obd_export *exp, struct lustre_id *id,
1401 __u64 offset, struct page *page,
1402 struct ptlrpc_request **request)
1404 struct obd_device *obd = exp->exp_obd;
1405 struct lmv_obd *lmv = &obd->u.lmv;
1406 struct lustre_id rid = *id;
1407 struct lmv_obj *obj;
1411 #warning "we need well-desgined readdir() implementation"
1412 rc = lmv_check_connect(obd);
1416 LASSERT(id_group(id) < lmv->desc.ld_tgt_count);
1417 CDEBUG(D_OTHER, "READPAGE at %llu from "DLID4"\n",
1418 offset, OLID4(&rid));
1420 obj = lmv_grab_obj(obd, id);
1424 /* find dirobj containing page with requested offset. */
1425 for (i = 0; i < obj->objcount; i++) {
1426 if (offset < obj->objs[i].size)
1428 offset -= obj->objs[i].size;
1430 rid = obj->objs[i].id;
1432 lmv_unlock_obj(obj);
1435 CDEBUG(D_OTHER, "forward to "DLID4" with offset %lu\n",
1436 OLID4(&rid), (unsigned long)offset);
1438 rc = md_readpage(lmv->tgts[id_group(&rid)].ltd_exp, &rid,
1439 offset, page, request);
1441 if (rc == 0 && !id_equal_fid(&rid, id))
1442 /* this page isn't from master object. To avoid "." and ".."
1443 * duplication in directory, we have to remove them from all
1445 lmv_remove_dots(page);
1450 int lmv_unlink_slaves(struct obd_export *exp, struct mdc_op_data *data,
1451 struct ptlrpc_request **req)
1453 struct obd_device *obd = exp->exp_obd;
1454 struct lmv_obd *lmv = &obd->u.lmv;
1455 struct mea *mea = data->mea1;
1456 struct mdc_op_data *data2;
1460 OBD_ALLOC(data2, sizeof(*data2));
1464 LASSERT(mea != NULL);
1465 for (i = 0; i < mea->mea_count; i++) {
1466 memset(data2, 0, sizeof(*data2));
1467 data2->id1 = mea->mea_ids[i];
1468 data2->create_mode = MDS_MODE_DONT_LOCK | S_IFDIR;
1470 if (lmv->tgts[id_group(&data2->id1)].ltd_exp == NULL)
1473 rc = md_unlink(lmv->tgts[id_group(&data2->id1)].ltd_exp,
1476 CDEBUG(D_OTHER, "unlink slave "DLID4" -> %d\n",
1477 OLID4(&mea->mea_ids[i]), rc);
1480 ptlrpc_req_finished(*req);
1486 OBD_FREE(data2, sizeof(*data2));
1490 int lmv_delete_inode(struct obd_export *exp, struct lustre_id *id)
1495 if (lmv_delete_obj(exp, id)) {
1496 CDEBUG(D_OTHER, "lmv object "DLID4" is destroyed.\n",
1502 int lmv_unlink(struct obd_export *exp, struct mdc_op_data *data,
1503 struct ptlrpc_request **request)
1505 struct obd_device *obd = exp->exp_obd;
1506 struct lmv_obd *lmv = &obd->u.lmv;
1510 rc = lmv_check_connect(obd);
1514 if (data->namelen == 0 && data->mea1 != NULL) {
1515 /* mds asks to remove slave objects */
1516 rc = lmv_unlink_slaves(exp, data, request);
1520 if (data->namelen != 0) {
1521 struct lmv_obj *obj;
1523 obj = lmv_grab_obj(obd, &data->id1);
1525 i = raw_name2idx(obj->hashtype, obj->objcount,
1526 data->name, data->namelen);
1527 data->id1 = obj->objs[i].id;
1530 CDEBUG(D_OTHER, "unlink '%*s' in "DLID4" -> %u\n",
1531 data->namelen, data->name, OLID4(&data->id1),
1534 CDEBUG(D_OTHER, "drop i_nlink on "DLID4"\n",
1537 rc = md_unlink(lmv->tgts[id_group(&data->id1)].ltd_exp,
1542 struct obd_device *lmv_get_real_obd(struct obd_export *exp,
1543 struct lustre_id *id)
1545 struct obd_device *obd = exp->exp_obd;
1546 struct lmv_obd *lmv = &obd->u.lmv;
1550 rc = lmv_check_connect(obd);
1552 RETURN(ERR_PTR(rc));
1553 obd = lmv->tgts[id_group(id)].ltd_exp->exp_obd;
1559 int lmv_init_ea_size(struct obd_export *exp, int easize,
1562 struct obd_device *obd = exp->exp_obd;
1563 struct lmv_obd *lmv = &obd->u.lmv;
1564 int i, rc = 0, change = 0;
1567 if (lmv->max_easize < easize) {
1568 lmv->max_easize = easize;
1571 if (lmv->max_cookiesize < cookiesize) {
1572 lmv->max_cookiesize = cookiesize;
1578 if (lmv->connected == 0)
1581 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1582 if (lmv->tgts[i].ltd_exp == NULL) {
1583 CWARN("%s: NULL export for %d\n", obd->obd_name, i);
1587 rc = obd_init_ea_size(lmv->tgts[i].ltd_exp, easize, cookiesize);
1589 CERROR("obd_init_ea_size() failed on MDT target %d, "
1590 "error %d.\n", i, rc);
1597 int lmv_obd_create_single(struct obd_export *exp, struct obdo *oa,
1598 struct lov_stripe_md **ea, struct obd_trans_info *oti)
1600 struct obd_device *obd = exp->exp_obd;
1601 struct lmv_obd *lmv = &obd->u.lmv;
1602 struct lov_stripe_md obj_md;
1603 struct lov_stripe_md *obj_mdp = &obj_md;
1607 LASSERT(ea == NULL);
1608 LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
1610 rc = obd_create(lmv->tgts[oa->o_mds].ltd_exp,
1616 int lmv_getready(struct obd_export *exp)
1618 struct obd_device *obd = exp->exp_obd;
1622 rc = lmv_check_connect(obd);
1627 * to be called from MDS only. @oa should have correct store cookie and o_fid
1628 * values for "master" object, as it will be used.
1630 int lmv_obd_create(struct obd_export *exp, struct obdo *oa,
1631 struct lov_stripe_md **ea, struct obd_trans_info *oti)
1633 struct obd_device *obd = exp->exp_obd;
1634 struct lmv_obd *lmv = &obd->u.lmv;
1635 struct lustre_id mid;
1640 rc = lmv_check_connect(obd);
1644 LASSERT(oa != NULL);
1647 rc = lmv_obd_create_single(exp, oa, NULL, oti);
1649 CERROR("Can't create object, rc = %d\n", rc);
1654 rc = obd_alloc_diskmd(exp, (struct lov_mds_md **)ea);
1656 CERROR("obd_alloc_diskmd() failed, error %d\n",
1667 * here we should take care about splitted dir, so store cookie and fid
1668 * for "master" object should already be allocated and passed in @oa.
1670 LASSERT(oa->o_id != 0);
1671 LASSERT(oa->o_fid != 0);
1673 /* save "master" object id */
1676 mea = (struct mea *)*ea;
1677 mea->mea_master = -1;
1678 mea->mea_magic = MEA_MAGIC_ALL_CHARS;
1680 if (!mea->mea_count || mea->mea_count > lmv->desc.ld_tgt_count)
1681 mea->mea_count = lmv->desc.ld_tgt_count;
1683 for (i = 0, c = 0; c < mea->mea_count && i < lmv->desc.ld_tgt_count; i++) {
1684 struct lov_stripe_md obj_md;
1685 struct lov_stripe_md *obj_mdp = &obj_md;
1687 if (lmv->tgts[i].ltd_exp == NULL) {
1688 /* this is "master" MDS */
1689 mea->mea_master = i;
1690 mea->mea_ids[c] = mid;
1696 * "master" MDS should always be part of stripped dir,
1699 if (mea->mea_master == -1 && c == mea->mea_count - 1)
1702 oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLTYPE | OBD_MD_FLMODE |
1703 OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLID;
1705 rc = obd_create(lmv->tgts[c].ltd_exp, oa, &obj_mdp, oti);
1707 CERROR("obd_create() failed on MDT target %d, "
1708 "error %d\n", c, rc);
1712 CDEBUG(D_OTHER, "dirobj at mds %d: "LPU64"/%u\n",
1713 i, oa->o_id, oa->o_generation);
1717 * here, when object is created (or it is master and was passed
1718 * from caller) on desired MDS we save its fid to local mea_ids.
1723 * store cookie should be defined here for both cases (master
1724 * object and not master), because master is already created.
1728 /* fill mea by store cookie and fid */
1729 obdo2id(&mea->mea_ids[c], oa);
1732 LASSERT(c == mea->mea_count);
1734 CDEBUG(D_OTHER, "%d dirobjects created\n",
1735 (int)mea->mea_count);
1740 static int lmv_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
1741 struct obd_device *tgt, int count,
1742 struct llog_catid *logid)
1744 struct llog_ctxt *ctxt;
1748 rc = obd_llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
1751 ctxt = llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT);
1752 ctxt->loc_imp = tgt->u.cli.cl_import;
1758 static int lmv_llog_finish(struct obd_device *obd,
1759 struct obd_llogs *llogs, int count)
1764 rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT));
1768 static int lmv_get_info(struct obd_export *exp, __u32 keylen,
1769 void *key, __u32 *vallen, void *val)
1771 struct obd_device *obd;
1772 struct lmv_obd *lmv;
1776 obd = class_exp2obd(exp);
1778 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1779 exp->exp_handle.h_cookie);
1784 if (keylen == 6 && memcmp(key, "mdsize", 6) == 0) {
1785 __u32 *mdsize = val;
1786 *vallen = sizeof(__u32);
1787 *mdsize = sizeof(struct lustre_id) * lmv->desc.ld_tgt_count
1788 + sizeof(struct mea);
1790 } else if (keylen == 6 && memcmp(key, "mdsnum", 6) == 0) {
1791 struct obd_uuid *cluuid = &lmv->cluuid;
1792 struct lmv_tgt_desc *tgts;
1793 __u32 *mdsnum = val;
1796 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count; i++, tgts++) {
1797 if (obd_uuid_equals(&tgts->uuid, cluuid)) {
1798 *vallen = sizeof(__u32);
1804 } else if (keylen == 6 && memcmp(key, "rootid", 6) == 0) {
1805 /* getting rootid from first MDS. */
1806 rc = obd_get_info(lmv->tgts[0].ltd_exp, keylen, key,
1809 } else if (keylen >= strlen("lmvdesc") && strcmp(key, "lmvdesc") == 0) {
1810 struct lmv_desc *desc_ret = val;
1811 *desc_ret = lmv->desc;
1813 } else if (keylen == strlen("remote_flag") &&
1814 !strcmp(key, "remote_flag")) {
1815 struct lmv_tgt_desc *tgts;
1818 LASSERT(*vallen == sizeof(__u32));
1819 for (i = 0, tgts = lmv->tgts; i < lmv->desc.ld_tgt_count;
1822 /* all tgts should be connected when this get called. */
1823 if (!tgts || !tgts->ltd_exp) {
1824 CERROR("target not setup?\n");
1828 if (!obd_get_info(tgts->ltd_exp, keylen, key,
1835 CDEBUG(D_IOCTL, "invalid key\n");
1839 int lmv_set_info(struct obd_export *exp, obd_count keylen,
1840 void *key, obd_count vallen, void *val)
1842 struct obd_device *obd;
1843 struct lmv_obd *lmv;
1846 obd = class_exp2obd(exp);
1848 CDEBUG(D_IOCTL, "invalid client cookie "LPX64"\n",
1849 exp->exp_handle.h_cookie);
1854 if (keylen >= strlen("inter_mds") && strcmp(key, "inter_mds") == 0) {
1855 lmv->server_timeout = 1;
1856 lmv_set_timeouts(obd);
1860 /* maybe this could be default */
1861 if ((keylen == strlen("sec") && strcmp(key, "sec") == 0) ||
1862 (keylen == strlen("nllu") && strcmp(key, "nllu") == 0)) {
1863 struct lmv_tgt_desc *tgt;
1864 struct obd_export *exp;
1867 spin_lock(&lmv->lmv_lock);
1868 for (i = 0, tgt = lmv->tgts; i < lmv->desc.ld_tgt_count;
1871 /* during setup time the connections to mdc might
1872 * haven't been established.
1875 struct obd_device *tgt_obd;
1877 tgt_obd = class_find_client_obd(&tgt->uuid,
1881 CERROR("can't set info %s, "
1882 "device %s not attached?\n",
1883 (char *) key, tgt->uuid.uuid);
1887 exp = tgt_obd->obd_self_export;
1890 err = obd_set_info(exp, keylen, key, vallen, val);
1894 spin_unlock(&lmv->lmv_lock);
1902 int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
1903 struct lov_stripe_md *lsm)
1905 struct obd_device *obd = class_exp2obd(exp);
1906 struct lmv_obd *lmv = &obd->u.lmv;
1907 struct mea *meap, *lsmp;
1911 mea_size = (sizeof(struct lustre_id) *
1912 lmv->desc.ld_tgt_count) + sizeof(struct mea);
1916 if (*lmmp && !lsm) {
1917 OBD_FREE(*lmmp, mea_size);
1922 if (*lmmp == NULL) {
1923 OBD_ALLOC(*lmmp, mea_size);
1931 lsmp = (struct mea *)lsm;
1932 meap = (struct mea *)*lmmp;
1934 if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
1935 lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
1938 meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
1939 meap->mea_count = cpu_to_le32(lsmp->mea_count);
1940 meap->mea_master = cpu_to_le32(lsmp->mea_master);
1942 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1943 meap->mea_ids[i] = meap->mea_ids[i];
1944 id_cpu_to_le(&meap->mea_ids[i]);
1950 int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
1951 struct lov_mds_md *lmm, int lmm_size)
1953 struct obd_device *obd = class_exp2obd(exp);
1954 struct mea **tmea = (struct mea **)lsmp;
1955 struct mea *mea = (struct mea *)lmm;
1956 struct lmv_obd *lmv = &obd->u.lmv;
1957 int mea_size, i, rc = 0;
1961 mea_size = sizeof(struct lustre_id) *
1962 lmv->desc.ld_tgt_count + sizeof(struct mea);
1967 if (*lsmp != NULL && lmm == NULL) {
1968 OBD_FREE(*tmea, mea_size);
1972 LASSERT(mea_size == lmm_size);
1974 OBD_ALLOC(*tmea, mea_size);
1981 if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
1982 mea->mea_magic == MEA_MAGIC_ALL_CHARS)
1984 magic = le32_to_cpu(mea->mea_magic);
1986 struct mea_old *old = (struct mea_old *)lmm;
1988 mea_size = sizeof(struct lustre_id) * old->mea_count +
1989 sizeof(struct mea_old);
1991 if (old->mea_count > 256 || old->mea_master > 256 ||
1992 lmm_size < mea_size || old->mea_master > old->mea_count) {
1993 CWARN("bad MEA: count %u, master %u, size %u\n",
1994 old->mea_count, old->mea_master, mea_size);
1995 GOTO(out_free_mea, rc = -EINVAL);
1997 magic = MEA_MAGIC_LAST_CHAR;
2000 (*tmea)->mea_magic = magic;
2001 (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
2002 (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
2004 for (i = 0; i < (*tmea)->mea_count; i++) {
2005 (*tmea)->mea_ids[i] = mea->mea_ids[i];
2006 id_le_to_cpu(&(*tmea)->mea_ids[i]);
2011 OBD_FREE(*tmea, mea_size);
2015 int lmv_brw(int rw, struct obd_export *exp, struct obdo *oa,
2016 struct lov_stripe_md *ea, obd_count oa_bufs,
2017 struct brw_page *pgarr, struct obd_trans_info *oti)
2019 struct obd_device *obd = exp->exp_obd;
2020 struct lmv_obd *lmv = &obd->u.lmv;
2021 struct mea *mea = (struct mea *) ea;
2024 LASSERT(oa != NULL);
2025 LASSERT(ea != NULL);
2026 LASSERT(pgarr != NULL);
2027 LASSERT(oa->o_mds < lmv->desc.ld_tgt_count);
2029 oa->o_gr = id_gen(&mea->mea_ids[oa->o_mds]);
2030 oa->o_id = id_ino(&mea->mea_ids[oa->o_mds]);
2031 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
2033 err = obd_brw(rw, lmv->tgts[oa->o_mds].ltd_exp,
2034 oa, NULL, oa_bufs, pgarr, oti);
2038 struct obd_ops lmv_obd_ops = {
2039 .o_owner = THIS_MODULE,
2040 .o_attach = lmv_attach,
2041 .o_detach = lmv_detach,
2042 .o_setup = lmv_setup,
2043 .o_cleanup = lmv_cleanup,
2044 .o_connect = lmv_connect,
2045 .o_disconnect = lmv_disconnect,
2046 .o_statfs = lmv_statfs,
2047 .o_llog_init = lmv_llog_init,
2048 .o_llog_finish = lmv_llog_finish,
2049 .o_get_info = lmv_get_info,
2050 .o_set_info = lmv_set_info,
2051 .o_create = lmv_obd_create,
2052 .o_packmd = lmv_packmd,
2053 .o_unpackmd = lmv_unpackmd,
2055 .o_init_ea_size = lmv_init_ea_size,
2056 .o_notify = lmv_notify,
2057 .o_iocontrol = lmv_iocontrol,
2058 .o_getready = lmv_getready,
2061 struct md_ops lmv_md_ops = {
2062 .m_getstatus = lmv_getstatus,
2063 .m_getattr = lmv_getattr,
2064 .m_change_cbdata = lmv_change_cbdata,
2065 .m_change_cbdata_name = lmv_change_cbdata_name,
2066 .m_close = lmv_close,
2067 .m_create = lmv_create,
2068 .m_done_writing = lmv_done_writing,
2069 .m_enqueue = lmv_enqueue,
2070 .m_getattr_lock = lmv_getattr_lock,
2071 .m_intent_lock = lmv_intent_lock,
2073 .m_rename = lmv_rename,
2074 .m_setattr = lmv_setattr,
2076 .m_readpage = lmv_readpage,
2077 .m_unlink = lmv_unlink,
2078 .m_get_real_obd = lmv_get_real_obd,
2079 .m_valid_attrs = lmv_valid_attrs,
2080 .m_delete_inode = lmv_delete_inode,
2083 int __init lmv_init(void)
2085 struct lprocfs_static_vars lvars;
2088 obj_cache = kmem_cache_create("lmv_objects",
2089 sizeof(struct lmv_obj),
2092 CERROR("error allocating lmv objects cache\n");
2096 lprocfs_init_vars(lmv, &lvars);
2097 rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
2099 OBD_LMV_DEVICENAME);
2101 kmem_cache_destroy(obj_cache);
2107 static void lmv_exit(void)
2109 class_unregister_type(OBD_LMV_DEVICENAME);
2111 LASSERTF(kmem_cache_destroy(obj_cache) == 0,
2112 "can't free lmv objects cache, %d object(s)"
2113 "still in use\n", atomic_read(&obj_cache_count));
2116 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2117 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
2118 MODULE_LICENSE("GPL");
2120 module_init(lmv_init);
2121 module_exit(lmv_exit);