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.
5 * Author: Phil Schwan <phil@clusterfs.com>
6 * Peter Braam <braam@clusterfs.com>
7 * Mike Shaver <shaver@clusterfs.com>
9 * This file is part of Lustre, http://www.lustre.org.
11 * Lustre is free software; you can redistribute it and/or
12 * modify it under the terms of version 2 of the GNU General Public
13 * License as published by the Free Software Foundation.
15 * Lustre is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with Lustre; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 # define EXPORT_SYMTAB
28 #define DEBUG_SUBSYSTEM S_LOV
30 #include <linux/slab.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/slab.h>
34 #include <linux/pagemap.h>
35 #include <linux/seq_file.h>
36 #include <asm/div64.h>
38 #include <liblustre.h>
41 #include <linux/obd_support.h>
42 #include <linux/lustre_lib.h>
43 #include <linux/lustre_net.h>
44 #include <linux/lustre_idl.h>
45 #include <linux/lustre_dlm.h>
46 #include <linux/lustre_mds.h>
47 #include <linux/obd_class.h>
48 #include <linux/obd_lov.h>
49 #include <linux/obd_ost.h>
50 #include <linux/lprocfs_status.h>
52 #include "lov_internal.h"
54 static int lov_stripe_offset(struct lov_stripe_md *lsm, obd_off lov_off,
55 int stripeno, obd_off *obd_off);
57 struct lov_lock_handles {
58 struct portals_handle llh_handle;
59 atomic_t llh_refcount;
61 struct lustre_handle llh_handles[0];
64 static void lov_llh_addref(void *llhp)
66 struct lov_lock_handles *llh = llhp;
68 atomic_inc(&llh->llh_refcount);
69 CDEBUG(D_INFO, "GETting llh %p : new refcount %d\n", llh,
70 atomic_read(&llh->llh_refcount));
73 static struct lov_lock_handles *lov_llh_new(struct lov_stripe_md *lsm)
75 struct lov_lock_handles *llh;
77 OBD_ALLOC(llh, sizeof *llh +
78 sizeof(*llh->llh_handles) * lsm->lsm_stripe_count);
80 CERROR("out of memory\n");
83 atomic_set(&llh->llh_refcount, 2);
84 llh->llh_stripe_count = lsm->lsm_stripe_count;
85 INIT_LIST_HEAD(&llh->llh_handle.h_link);
86 class_handle_hash(&llh->llh_handle, lov_llh_addref);
90 static struct lov_lock_handles *lov_handle2llh(struct lustre_handle *handle)
93 LASSERT(handle != NULL);
94 RETURN(class_handle2object(handle->cookie));
97 static void lov_llh_put(struct lov_lock_handles *llh)
99 CDEBUG(D_INFO, "PUTting llh %p : new refcount %d\n", llh,
100 atomic_read(&llh->llh_refcount) - 1);
101 LASSERT(atomic_read(&llh->llh_refcount) > 0 &&
102 atomic_read(&llh->llh_refcount) < 0x5a5a);
103 if (atomic_dec_and_test(&llh->llh_refcount)) {
104 LASSERT(list_empty(&llh->llh_handle.h_link));
105 OBD_FREE(llh, sizeof *llh +
106 sizeof(*llh->llh_handles) * llh->llh_stripe_count);
110 static void lov_llh_destroy(struct lov_lock_handles *llh)
112 class_handle_unhash(&llh->llh_handle);
117 static int lov_connect(struct lustre_handle *conn, struct obd_device *obd,
118 struct obd_uuid *cluuid)
120 struct ptlrpc_request *req = NULL;
121 struct lov_obd *lov = &obd->u.lov;
122 struct lov_desc *desc = &lov->desc;
123 struct lov_tgt_desc *tgts;
124 struct obd_export *exp;
128 rc = class_connect(conn, obd, cluuid);
132 exp = class_conn2export(conn);
134 /* We don't want to actually do the underlying connections more than
135 * once, so keep track. */
137 if (lov->refcount > 1) {
138 class_export_put(exp);
142 for (i = 0, tgts = lov->tgts; i < desc->ld_tgt_count; i++, tgts++) {
143 struct obd_uuid *tgt_uuid = &tgts->uuid;
144 struct obd_device *tgt_obd;
145 struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
146 struct lustre_handle conn = {0, };
148 LASSERT( tgt_uuid != NULL);
150 tgt_obd = class_find_client_obd(tgt_uuid, LUSTRE_OSC_NAME,
154 CERROR("Target %s not attached\n", tgt_uuid->uuid);
155 GOTO(out_disc, rc = -EINVAL);
158 if (!tgt_obd->obd_set_up) {
159 CERROR("Target %s not set up\n", tgt_uuid->uuid);
160 GOTO(out_disc, rc = -EINVAL);
163 if (tgt_obd->u.cli.cl_import->imp_invalid) {
164 CERROR("not connecting OSC %s; administratively "
165 "disabled\n", tgt_uuid->uuid);
166 rc = obd_register_observer(tgt_obd, obd);
168 CERROR("Target %s register_observer error %d; "
169 "will not be able to reactivate\n",
175 rc = obd_connect(&conn, tgt_obd, &lov_osc_uuid);
177 CERROR("Target %s connect error %d\n", tgt_uuid->uuid,
181 tgts->ltd_exp = class_conn2export(&conn);
183 rc = obd_register_observer(tgt_obd, obd);
185 CERROR("Target %s register_observer error %d\n",
187 obd_disconnect(tgts->ltd_exp, 0);
191 desc->ld_active_tgt_count++;
195 ptlrpc_req_finished(req);
196 class_export_put(exp);
201 struct obd_uuid uuid;
203 --desc->ld_active_tgt_count;
205 /* save for CERROR below; (we know it's terminated) */
207 rc2 = obd_disconnect(tgts->ltd_exp, 0);
209 CERROR("error: LOV target %s disconnect on OST idx %d: "
210 "rc = %d\n", uuid.uuid, i, rc2);
212 class_disconnect(exp, 0);
216 static int lov_disconnect(struct obd_export *exp, int flags)
218 struct obd_device *obd = class_exp2obd(exp);
219 struct lov_obd *lov = &obd->u.lov;
226 /* Only disconnect the underlying layers on the final disconnect. */
228 if (lov->refcount != 0)
231 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
232 if (lov->tgts[i].ltd_exp == NULL)
235 if (obd->obd_no_recov) {
236 /* Pass it on to our clients.
237 * XXX This should be an argument to disconnect,
238 * XXX not a back-door flag on the OBD. Ah well.
240 struct obd_device *osc_obd;
241 osc_obd = class_exp2obd(lov->tgts[i].ltd_exp);
243 osc_obd->obd_no_recov = 1;
246 obd_register_observer(lov->tgts[i].ltd_exp->exp_obd, NULL);
248 rc = obd_disconnect(lov->tgts[i].ltd_exp, flags);
250 if (lov->tgts[i].active) {
251 CERROR("Target %s disconnect error %d\n",
252 lov->tgts[i].uuid.uuid, rc);
256 if (lov->tgts[i].active) {
257 lov->desc.ld_active_tgt_count--;
258 lov->tgts[i].active = 0;
260 lov->tgts[i].ltd_exp = NULL;
264 rc = class_disconnect(exp, 0);
270 * -EINVAL : UUID can't be found in the LOV's target list
271 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
272 * -EBADF : The UUID is found, but the OBD is the wrong type (!)
274 static int lov_set_osc_active(struct lov_obd *lov, struct obd_uuid *uuid,
277 struct obd_device *obd;
278 struct lov_tgt_desc *tgt;
282 CDEBUG(D_INFO, "Searching in lov %p for uuid %s (activate=%d)\n",
283 lov, uuid->uuid, activate);
285 spin_lock(&lov->lov_lock);
286 for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, tgt++) {
287 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
288 i, tgt->uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
289 if (strncmp(uuid->uuid, tgt->uuid.uuid, sizeof uuid->uuid) == 0)
293 if (i == lov->desc.ld_tgt_count)
294 GOTO(out, rc = -EINVAL);
296 obd = class_exp2obd(tgt->ltd_exp);
298 /* This can happen if OST failure races with node shutdown */
299 GOTO(out, rc = -ENOTCONN);
302 CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LOV idx %d\n",
303 obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
304 obd->obd_type->typ_name, i);
305 LASSERT(strcmp(obd->obd_type->typ_name, "osc") == 0);
307 if (tgt->active == activate) {
308 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
309 activate ? "" : "in");
313 CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd, activate ? "" : "in");
315 tgt->active = activate;
317 lov->desc.ld_active_tgt_count++;
319 lov->desc.ld_active_tgt_count--;
323 spin_unlock(&lov->lov_lock);
327 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
331 struct obd_uuid *uuid;
333 if (strcmp(watched->obd_type->typ_name, "osc")) {
334 CERROR("unexpected notification of %s %s!\n",
335 watched->obd_type->typ_name,
339 uuid = &watched->u.cli.cl_import->imp_target_uuid;
342 * Must notify (MDS) before we mark the OSC as active, so that
343 * the orphan deletion happens without interference from racing
346 if (obd->obd_observer) {
347 /* Pass the notification up the chain. */
348 rc = obd_notify(obd->obd_observer, watched, active);
353 rc = lov_set_osc_active(&obd->u.lov, uuid, active);
356 CERROR("%sactivation of %s failed: %d\n",
357 active ? "" : "de", uuid->uuid, rc);
362 static int lov_setup(struct obd_device *obd, obd_count len, void *buf)
364 struct lprocfs_static_vars lvars;
365 struct lustre_cfg *lcfg = buf;
366 struct lov_desc *desc;
367 struct lov_obd *lov = &obd->u.lov;
368 struct obd_uuid *uuids;
369 struct lov_tgt_desc *tgts;
374 if (lcfg->lcfg_inllen1 < 1) {
375 CERROR("LOV setup requires a descriptor\n");
379 if (lcfg->lcfg_inllen2 < 1) {
380 CERROR("LOV setup requires an OST UUID list\n");
384 desc = (struct lov_desc *)lcfg->lcfg_inlbuf1;
385 if (sizeof(*desc) > lcfg->lcfg_inllen1) {
386 CERROR("descriptor size wrong: %d > %d\n",
387 (int)sizeof(*desc), lcfg->lcfg_inllen1);
391 count = desc->ld_tgt_count;
392 uuids = (struct obd_uuid *)lcfg->lcfg_inlbuf2;
393 if (sizeof(*uuids) * count != lcfg->lcfg_inllen2) {
394 CERROR("UUID array size wrong: %u * %u != %u\n",
395 (int)sizeof(*uuids), count, lcfg->lcfg_inllen2);
399 /* Because of 64-bit divide/mod operations only work with a 32-bit
400 * divisor in a 32-bit kernel, we cannot support a stripe width
401 * of 4GB or larger on 32-bit CPUs.
403 if ((desc->ld_default_stripe_count ?
404 desc->ld_default_stripe_count : desc->ld_tgt_count) *
405 desc->ld_default_stripe_size > ~0UL) {
406 CERROR("LOV: stripe width "LPU64"x%u > %lu on 32-bit system\n",
407 desc->ld_default_stripe_size,
408 desc->ld_default_stripe_count ?
409 desc->ld_default_stripe_count : desc->ld_tgt_count,~0UL);
413 lov->bufsize = sizeof(struct lov_tgt_desc) * count;
414 OBD_ALLOC(lov->tgts, lov->bufsize);
415 if (lov->tgts == NULL) {
416 CERROR("Out of memory\n");
421 spin_lock_init(&lov->lov_lock);
423 for (i = 0, tgts = lov->tgts; i < desc->ld_tgt_count; i++, tgts++) {
424 struct obd_uuid *uuid = &tgts->uuid;
426 /* NULL termination already checked */
430 lprocfs_init_vars(lov, &lvars);
431 lprocfs_obd_setup(obd, lvars.obd_vars);
434 struct proc_dir_entry *entry;
436 entry = create_proc_entry("target_obd", 0444,
437 obd->obd_proc_entry);
439 entry->proc_fops = &lov_proc_target_fops;
448 static int lov_cleanup(struct obd_device *obd, int flags)
450 struct lov_obd *lov = &obd->u.lov;
452 lprocfs_obd_cleanup(obd);
453 OBD_FREE(lov->tgts, lov->bufsize);
459 /* compute object size given "stripeno" and the ost size */
460 static obd_size lov_stripe_size(struct lov_stripe_md *lsm, obd_size ost_size,
463 unsigned long ssize = lsm->lsm_stripe_size;
464 unsigned long swidth = ssize * lsm->lsm_stripe_count;
465 unsigned long stripe_size;
471 /* do_div(a, b) returns a % b, and a = a / b */
472 stripe_size = do_div(ost_size, ssize);
475 lov_size = ost_size * swidth + stripeno * ssize + stripe_size;
477 lov_size = (ost_size - 1) * swidth + (stripeno + 1) * ssize;
482 static void lov_merge_attrs(struct obdo *tgt, struct obdo *src, obd_flag valid,
483 struct lov_stripe_md *lsm, int stripeno, int *set)
485 valid &= src->o_valid;
488 if (valid & OBD_MD_FLSIZE) {
489 /* this handles sparse files properly */
492 lov_size = lov_stripe_size(lsm, src->o_size, stripeno);
493 if (lov_size > tgt->o_size)
494 tgt->o_size = lov_size;
496 if (valid & OBD_MD_FLBLOCKS)
497 tgt->o_blocks += src->o_blocks;
498 if (valid & OBD_MD_FLBLKSZ)
499 tgt->o_blksize += src->o_blksize;
500 if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime)
501 tgt->o_ctime = src->o_ctime;
502 if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime)
503 tgt->o_mtime = src->o_mtime;
505 memcpy(tgt, src, sizeof(*tgt));
506 tgt->o_id = lsm->lsm_object_id;
507 if (valid & OBD_MD_FLSIZE)
508 tgt->o_size = lov_stripe_size(lsm,src->o_size,stripeno);
514 #define log2(n) ffz(~(n))
517 static int lov_clear_orphans(struct obd_export *export, struct obdo *src_oa,
518 struct lov_stripe_md **ea,
519 struct obd_trans_info *oti)
523 struct obd_uuid *ost_uuid = NULL;
527 LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
528 src_oa->o_flags == OBD_FL_DELORPHAN);
530 lov = &export->exp_obd->u.lov;
532 tmp_oa = obdo_alloc();
536 if (src_oa->o_valid & OBD_MD_FLINLINE) {
537 ost_uuid = (struct obd_uuid *)src_oa->o_inline;
538 CDEBUG(D_HA, "clearing orphans only for %s\n",
542 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
543 struct lov_stripe_md obj_md;
544 struct lov_stripe_md *obj_mdp = &obj_md;
547 /* if called for a specific target, we don't
548 care if it is not active. */
549 if (lov->tgts[i].active == 0 && ost_uuid == NULL) {
550 CDEBUG(D_HA, "lov idx %d inactive\n", i);
554 if (ost_uuid && !obd_uuid_equals(ost_uuid, &lov->tgts[i].uuid))
557 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
559 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
560 err = obd_create(lov->tgts[i].ltd_exp, tmp_oa, &obj_mdp, oti);
562 /* This export will be disabled until it is recovered,
563 and then orphan recovery will be completed. */
564 CERROR("error in orphan recovery on OST idx %d/%d: "
565 "rc = %d\n", i, lov->desc.ld_tgt_count, err);
574 #define LOV_CREATE_RESEED_INTERVAL 1000
576 /* the LOV expects oa->o_id to be set to the LOV object id */
577 static int lov_create(struct obd_export *exp, struct obdo *src_oa,
578 struct lov_stripe_md **ea, struct obd_trans_info *oti)
580 static int ost_start_idx, ost_start_count;
582 struct lov_stripe_md *lsm;
583 struct lov_oinfo *loi = NULL;
584 struct obdo *tmp_oa, *ret_oa;
585 struct llog_cookie *cookies = NULL;
586 unsigned ost_count, ost_idx;
587 int set = 0, obj_alloc = 0, cookie_sent = 0, rc = 0, i;
592 if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
593 src_oa->o_flags == OBD_FL_DELORPHAN) {
594 rc = lov_clear_orphans(exp, src_oa, ea, oti);
601 lov = &exp->exp_obd->u.lov;
603 if (!lov->desc.ld_active_tgt_count)
606 /* Recreate a specific object id at the given OST index */
607 if (src_oa->o_valid & OBD_MD_FLFLAGS && src_oa->o_flags &
608 OBD_FL_RECREATE_OBJS) {
609 struct lov_stripe_md obj_md;
610 struct lov_stripe_md *obj_mdp = &obj_md;
612 ost_idx = src_oa->o_nlink;
616 if (ost_idx >= lov->desc.ld_tgt_count)
618 for (i = 0; i < lsm->lsm_stripe_count; i++) {
619 if (lsm->lsm_oinfo[i].loi_ost_idx == ost_idx) {
620 if (lsm->lsm_oinfo[i].loi_id != src_oa->o_id)
625 if (i == lsm->lsm_stripe_count)
628 rc = obd_create(lov->tgts[ost_idx].ltd_exp, src_oa,
633 ret_oa = obdo_alloc();
637 tmp_oa = obdo_alloc();
639 GOTO(out_oa, rc = -ENOMEM);
644 ost_count = lov_get_stripecnt(lov, 0);
646 /* If the MDS file was truncated up to some size, stripe over
647 * enough OSTs to allow the file to be created at that size. */
648 if (src_oa->o_valid & OBD_MD_FLSIZE) {
649 stripes=((src_oa->o_size+LUSTRE_STRIPE_MAXBYTES)>>12)-1;
650 do_div(stripes, (__u32)(LUSTRE_STRIPE_MAXBYTES >> 12));
652 if (stripes > lov->desc.ld_active_tgt_count)
654 if (stripes < ost_count)
660 rc = lov_alloc_memmd(&lsm, stripes, lov->desc.ld_pattern ?
661 lov->desc.ld_pattern : LOV_PATTERN_RAID0);
668 ost_count = lov->desc.ld_tgt_count;
670 LASSERT(src_oa->o_valid & OBD_MD_FLID);
671 lsm->lsm_object_id = src_oa->o_id;
672 if (!lsm->lsm_stripe_size)
673 lsm->lsm_stripe_size = lov->desc.ld_default_stripe_size;
674 if (!lsm->lsm_pattern) {
675 lsm->lsm_pattern = lov->desc.ld_pattern ?
676 lov->desc.ld_pattern : LOV_PATTERN_RAID0;
679 if (*ea == NULL || lsm->lsm_oinfo[0].loi_ost_idx >= ost_count) {
680 if (--ost_start_count <= 0) {
681 ost_start_idx = ll_insecure_random_int();
682 ost_start_count = LOV_CREATE_RESEED_INTERVAL;
683 } else if (lsm->lsm_stripe_count >=
684 lov->desc.ld_active_tgt_count) {
685 /* If we allocate from all of the stripes, make the
686 * next file start on the next OST. */
689 ost_idx = ost_start_idx % ost_count;
691 ost_idx = lsm->lsm_oinfo[0].loi_ost_idx;
694 CDEBUG(D_INODE, "allocating %d subobjs for objid "LPX64" at idx %d\n",
695 lsm->lsm_stripe_count, lsm->lsm_object_id, ost_idx);
697 /* XXX LOV STACKING: need to figure out how many real OSCs */
698 if (oti && (src_oa->o_valid & OBD_MD_FLCOOKIE)) {
699 oti_alloc_cookies(oti, lsm->lsm_stripe_count);
700 if (!oti->oti_logcookies)
701 GOTO(out_cleanup, rc = -ENOMEM);
702 cookies = oti->oti_logcookies;
705 loi = lsm->lsm_oinfo;
706 for (i = 0; i < ost_count; i++, ost_idx = (ost_idx + 1) % ost_count) {
707 struct lov_stripe_md obj_md;
708 struct lov_stripe_md *obj_mdp = &obj_md;
712 if (lov->tgts[ost_idx].active == 0) {
713 CDEBUG(D_HA, "lov idx %d inactive\n", ost_idx);
717 /* create data objects with "parent" OA */
718 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
720 /* XXX When we start creating objects on demand, we need to
721 * make sure that we always create the object on the
722 * stripe which holds the existing file size.
724 if (src_oa->o_valid & OBD_MD_FLSIZE) {
725 if (lov_stripe_offset(lsm, src_oa->o_size, i,
726 &tmp_oa->o_size) < 0 &&
730 CDEBUG(D_INODE, "stripe %d has size "LPU64"/"LPU64"\n",
731 i, tmp_oa->o_size, src_oa->o_size);
735 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
736 err = obd_create(lov->tgts[ost_idx].ltd_exp, tmp_oa, &obj_mdp,
739 if (lov->tgts[ost_idx].active) {
740 CERROR("error creating objid "LPX64" sub-object"
741 " on OST idx %d/%d: rc = %d\n",
742 src_oa->o_id, ost_idx,
743 lsm->lsm_stripe_count, err);
745 CERROR("obd_create returned invalid "
755 oti->oti_objid[ost_idx] = tmp_oa->o_id;
756 loi->loi_id = tmp_oa->o_id;
757 loi->loi_ost_idx = ost_idx;
758 CDEBUG(D_INODE, "objid "LPX64" has subobj "LPX64" at idx %d\n",
759 lsm->lsm_object_id, loi->loi_id, ost_idx);
761 lov_merge_attrs(ret_oa, tmp_oa, tmp_oa->o_valid, lsm,
766 ++oti->oti_logcookies;
767 if (tmp_oa->o_valid & OBD_MD_FLCOOKIE)
772 /* If we have allocated enough objects, we are OK */
773 if (obj_alloc == lsm->lsm_stripe_count)
774 GOTO(out_done, rc = 0);
777 if (obj_alloc == 0) {
780 GOTO(out_cleanup, rc);
783 /* If we were passed specific striping params, then a failure to
784 * meet those requirements is an error, since we can't reallocate
785 * that memory (it might be part of a larger array or something).
787 * We can only get here if lsm_stripe_count was originally > 1.
790 CERROR("can't lstripe objid "LPX64": have %u want %u, rc %d\n",
791 lsm->lsm_object_id, obj_alloc, lsm->lsm_stripe_count,rc);
794 GOTO(out_cleanup, rc);
796 struct lov_stripe_md *lsm_new;
797 /* XXX LOV STACKING call into osc for sizes */
798 unsigned oldsize, newsize;
800 if (oti && cookies && cookie_sent) {
801 oldsize = lsm->lsm_stripe_count * sizeof(*cookies);
802 newsize = obj_alloc * sizeof(*cookies);
804 oti_alloc_cookies(oti, obj_alloc);
805 if (oti->oti_logcookies) {
806 memcpy(oti->oti_logcookies, cookies, newsize);
807 OBD_FREE(cookies, oldsize);
808 cookies = oti->oti_logcookies;
810 CWARN("'leaking' %d bytes\n", oldsize-newsize);
814 CWARN("using fewer stripes for object "LPX64": old %u new %u\n",
815 lsm->lsm_object_id, lsm->lsm_stripe_count, obj_alloc);
816 oldsize = lov_stripe_md_size(lsm->lsm_stripe_count);
817 newsize = lov_stripe_md_size(obj_alloc);
818 OBD_ALLOC(lsm_new, newsize);
819 if (lsm_new != NULL) {
820 memcpy(lsm_new, lsm, newsize);
821 lsm_new->lsm_stripe_count = obj_alloc;
822 OBD_FREE(lsm, oldsize);
825 CWARN("'leaking' %d bytes\n", oldsize - newsize);
832 if (src_oa->o_valid & OBD_MD_FLSIZE &&
833 ret_oa->o_size != src_oa->o_size) {
834 CERROR("original size "LPU64" isn't new object size "LPU64"\n",
835 src_oa->o_size, ret_oa->o_size);
838 ret_oa->o_id = src_oa->o_id;
839 memcpy(src_oa, ret_oa, sizeof(*src_oa));
845 if (oti && cookies) {
846 oti->oti_logcookies = cookies;
848 oti_free_cookies(oti);
849 src_oa->o_valid &= ~OBD_MD_FLCOOKIE;
851 src_oa->o_valid |= OBD_MD_FLCOOKIE;
857 while (obj_alloc-- > 0) {
858 struct obd_export *sub_exp;
862 sub_exp = lov->tgts[loi->loi_ost_idx].ltd_exp;
863 /* destroy already created objects here */
864 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
865 tmp_oa->o_id = loi->loi_id;
867 err = obd_destroy(sub_exp, tmp_oa, NULL, oti);
869 CERROR("Failed to uncreate objid "LPX64" subobj "LPX64
870 " on OST idx %d: rc = %d\n", src_oa->o_id,
871 loi->loi_id, loi->loi_ost_idx, err);
874 obd_free_memmd(exp, &lsm);
878 #define lsm_bad_magic(LSMP) \
880 struct lov_stripe_md *_lsm__ = (LSMP); \
883 CERROR("LOV requires striping ea\n"); \
885 } else if (_lsm__->lsm_magic != LOV_MAGIC) { \
886 CERROR("LOV striping magic bad %#x != %#x\n", \
887 _lsm__->lsm_magic, LOV_MAGIC); \
893 static int lov_destroy(struct obd_export *exp, struct obdo *oa,
894 struct lov_stripe_md *lsm, struct obd_trans_info *oti)
898 struct lov_oinfo *loi;
902 if (lsm_bad_magic(lsm))
905 if (!exp || !exp->exp_obd)
908 lov = &exp->exp_obd->u.lov;
909 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
911 if (lov->tgts[loi->loi_ost_idx].active == 0) {
912 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
913 /* Orphan clean up will (someday) fix this up. */
914 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
915 oti->oti_logcookies++;
919 memcpy(&tmp, oa, sizeof(tmp));
920 tmp.o_id = loi->loi_id;
921 err = obd_destroy(lov->tgts[loi->loi_ost_idx].ltd_exp, &tmp,
923 if (err && lov->tgts[loi->loi_ost_idx].active) {
924 CERROR("error: destroying objid "LPX64" subobj "
925 LPX64" on OST idx %d: rc = %d\n",
926 oa->o_id, loi->loi_id, loi->loi_ost_idx, err);
934 static int lov_getattr(struct obd_export *exp, struct obdo *oa,
935 struct lov_stripe_md *lsm)
939 struct lov_oinfo *loi;
940 int i, rc = 0, set = 0;
943 if (lsm_bad_magic(lsm))
946 if (!exp || !exp->exp_obd)
949 lov = &exp->exp_obd->u.lov;
951 CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
952 lsm->lsm_object_id, lsm->lsm_stripe_count, lsm->lsm_stripe_size);
953 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
956 if (lov->tgts[loi->loi_ost_idx].active == 0) {
957 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
961 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
962 "%u\n", oa->o_id, i, loi->loi_id, loi->loi_ost_idx);
963 /* create data objects with "parent" OA */
964 memcpy(&tmp, oa, sizeof(tmp));
965 tmp.o_id = loi->loi_id;
967 err = obd_getattr(lov->tgts[loi->loi_ost_idx].ltd_exp, &tmp,
970 if (lov->tgts[loi->loi_ost_idx].active) {
971 CERROR("error: getattr objid "LPX64" subobj "
972 LPX64" on OST idx %d: rc = %d\n",
973 oa->o_id, loi->loi_id, loi->loi_ost_idx,
978 lov_merge_attrs(oa, &tmp, tmp.o_valid, lsm, i, &set);
986 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset, void *data,
989 struct lov_getattr_async_args *aa = data;
990 struct lov_stripe_md *lsm = aa->aa_lsm;
991 struct obdo *oa = aa->aa_oa;
992 struct obdo *obdos = aa->aa_obdos;
993 struct lov_oinfo *loi;
999 /* NB all stripe requests succeeded to get here */
1001 for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
1003 if (obdos[i].o_valid == 0) /* inactive stripe */
1006 lov_merge_attrs(oa, &obdos[i], obdos[i].o_valid, lsm,
1011 CERROR ("No stripes had valid attrs\n");
1016 OBD_FREE (obdos, lsm->lsm_stripe_count * sizeof (*obdos));
1020 static int lov_getattr_async(struct obd_export *exp, struct obdo *oa,
1021 struct lov_stripe_md *lsm,
1022 struct ptlrpc_request_set *rqset)
1025 struct lov_obd *lov;
1026 struct lov_oinfo *loi;
1027 struct lov_getattr_async_args *aa;
1028 int i, rc = 0, set = 0;
1031 if (lsm_bad_magic(lsm))
1034 if (!exp || !exp->exp_obd)
1037 lov = &exp->exp_obd->u.lov;
1039 OBD_ALLOC (obdos, lsm->lsm_stripe_count * sizeof (*obdos));
1043 CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1044 lsm->lsm_object_id, lsm->lsm_stripe_count, lsm->lsm_stripe_size);
1045 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
1048 if (lov->tgts[loi->loi_ost_idx].active == 0) {
1049 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1050 /* leaves obdos[i].obd_valid unset */
1054 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1055 "%u\n", oa->o_id, i, loi->loi_id, loi->loi_ost_idx);
1056 /* create data objects with "parent" OA */
1057 memcpy(&obdos[i], oa, sizeof(obdos[i]));
1058 obdos[i].o_id = loi->loi_id;
1060 err = obd_getattr_async(lov->tgts[loi->loi_ost_idx].ltd_exp,
1061 &obdos[i], NULL, rqset);
1063 CERROR("error: getattr objid "LPX64" subobj "
1064 LPX64" on OST idx %d: rc = %d\n",
1065 oa->o_id, loi->loi_id, loi->loi_ost_idx,
1067 GOTO(out_obdos, rc = err);
1072 GOTO (out_obdos, rc = -EIO);
1074 LASSERT (rqset->set_interpret == NULL);
1075 rqset->set_interpret = lov_getattr_interpret;
1076 LASSERT (sizeof (rqset->set_args) >= sizeof (*aa));
1077 aa = (struct lov_getattr_async_args *)&rqset->set_args;
1080 aa->aa_obdos = obdos;
1085 OBD_FREE (obdos, lsm->lsm_stripe_count * sizeof (*obdos));
1091 static int lov_setattr(struct obd_export *exp, struct obdo *src_oa,
1092 struct lov_stripe_md *lsm, struct obd_trans_info *oti)
1094 struct obdo *tmp_oa, *ret_oa;
1095 struct lov_obd *lov;
1096 struct lov_oinfo *loi;
1097 int rc = 0, i, set = 0;
1100 if (lsm_bad_magic(lsm))
1103 if (!exp || !exp->exp_obd)
1106 /* for now, we only expect time updates here */
1107 LASSERT(!(src_oa->o_valid & ~(OBD_MD_FLID|OBD_MD_FLTYPE | OBD_MD_FLMODE|
1108 OBD_MD_FLATIME | OBD_MD_FLMTIME |
1109 OBD_MD_FLCTIME | OBD_MD_FLFLAGS |
1111 ret_oa = obdo_alloc();
1115 tmp_oa = obdo_alloc();
1117 GOTO(out_oa, rc = -ENOMEM);
1119 lov = &exp->exp_obd->u.lov;
1120 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
1123 if (lov->tgts[loi->loi_ost_idx].active == 0) {
1124 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1128 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
1129 tmp_oa->o_id = loi->loi_id;
1131 if (src_oa->o_valid & OBD_MD_FLSIZE) {
1132 if (lov_stripe_offset(lsm, src_oa->o_size, i,
1133 &tmp_oa->o_size) < 0 &&
1137 CDEBUG(D_INODE, "stripe %d has size "LPU64"/"LPU64"\n",
1138 i, tmp_oa->o_size, src_oa->o_size);
1141 err = obd_setattr(lov->tgts[loi->loi_ost_idx].ltd_exp, tmp_oa,
1144 if (lov->tgts[loi->loi_ost_idx].active) {
1145 CERROR("error: setattr objid "LPX64" subobj "
1146 LPX64" on OST idx %d: rc = %d\n",
1147 src_oa->o_id, loi->loi_id,
1148 loi->loi_ost_idx, err);
1154 lov_merge_attrs(ret_oa, tmp_oa, tmp_oa->o_valid, lsm, i, &set);
1159 ret_oa->o_id = src_oa->o_id;
1160 memcpy(src_oa, ret_oa, sizeof(*src_oa));
1169 /* we have an offset in file backed by an lov and want to find out where
1170 * that offset lands in our given stripe of the file. for the easy
1171 * case where the offset is within the stripe, we just have to scale the
1172 * offset down to make it relative to the stripe instead of the lov.
1174 * the harder case is what to do when the offset doesn't intersect the
1175 * stripe. callers will want start offsets clamped ahead to the start
1176 * of the nearest stripe in the file. end offsets similarly clamped to the
1177 * nearest ending byte of a stripe in the file:
1179 * all this function does is move offsets to the nearest region of the
1180 * stripe, and it does its work "mod" the full length of all the stripes.
1181 * consider a file with 3 stripes:
1184 * ---------------------------------------------------------------------
1185 * | 0 | 1 | 2 | 0 | 1 | 2 |
1186 * ---------------------------------------------------------------------
1188 * to find stripe 1's offsets for S and E, it divides by the full stripe
1189 * width and does its math in the context of a single set of stripes:
1192 * -----------------------------------
1194 * -----------------------------------
1196 * it'll notice that E is outside stripe 1 and clamp it to the end of the
1197 * stripe, then multiply it back out by lov_off to give the real offsets in
1201 * ---------------------------------------------------------------------
1202 * | 1 | 1 | 1 | 1 | 1 | 1 |
1203 * ---------------------------------------------------------------------
1205 * it would have done similarly and pulled S forward to the start of a 1
1206 * stripe if, say, S had landed in a 0 stripe.
1208 * this rounding isn't always correct. consider an E lov offset that lands
1209 * on a 0 stripe, the "mod stripe width" math will pull it forward to the
1210 * start of a 1 stripe, when in fact it wanted to be rounded back to the end
1211 * of a previous 1 stripe. this logic is handled by callers and this is why:
1213 * this function returns < 0 when the offset was "before" the stripe and
1214 * was moved forward to the start of the stripe in question; 0 when it
1215 * falls in the stripe and no shifting was done; > 0 when the offset
1216 * was outside the stripe and was pulled back to its final byte. */
1217 static int lov_stripe_offset(struct lov_stripe_md *lsm, obd_off lov_off,
1218 int stripeno, obd_off *obd_off)
1220 unsigned long ssize = lsm->lsm_stripe_size;
1221 unsigned long swidth = ssize * lsm->lsm_stripe_count;
1222 unsigned long stripe_off, this_stripe;
1225 if (lov_off == OBD_OBJECT_EOF) {
1226 *obd_off = OBD_OBJECT_EOF;
1230 /* do_div(a, b) returns a % b, and a = a / b */
1231 stripe_off = do_div(lov_off, swidth);
1233 this_stripe = stripeno * ssize;
1234 if (stripe_off < this_stripe) {
1238 stripe_off -= this_stripe;
1240 if (stripe_off >= ssize) {
1246 *obd_off = lov_off * ssize + stripe_off;
1250 /* Given a whole-file size and a stripe number, give the file size which
1251 * corresponds to the individual object of that stripe.
1253 * This behaves basically in the same was as lov_stripe_offset, except that
1254 * file sizes falling before the beginning of a stripe are clamped to the end
1255 * of the previous stripe, not the beginning of the next:
1258 * ---------------------------------------------------------------------
1259 * | 0 | 1 | 2 | 0 | 1 | 2 |
1260 * ---------------------------------------------------------------------
1262 * if clamped to stripe 2 becomes:
1265 * ---------------------------------------------------------------------
1266 * | 0 | 1 | 2 | 0 | 1 | 2 |
1267 * ---------------------------------------------------------------------
1269 static obd_off lov_size_to_stripe(struct lov_stripe_md *lsm, obd_off file_size,
1272 unsigned long ssize = lsm->lsm_stripe_size;
1273 unsigned long swidth = ssize * lsm->lsm_stripe_count;
1274 unsigned long stripe_off, this_stripe;
1276 if (file_size == OBD_OBJECT_EOF)
1277 return OBD_OBJECT_EOF;
1279 /* do_div(a, b) returns a % b, and a = a / b */
1280 stripe_off = do_div(file_size, swidth);
1282 this_stripe = stripeno * ssize;
1283 if (stripe_off < this_stripe) {
1284 /* Move to end of previous stripe, or zero */
1285 if (file_size > 0) {
1292 stripe_off -= this_stripe;
1294 if (stripe_off >= ssize) {
1295 /* Clamp to end of this stripe */
1300 return (file_size * ssize + stripe_off);
1303 /* given an extent in an lov and a stripe, calculate the extent of the stripe
1304 * that is contained within the lov extent. this returns true if the given
1305 * stripe does intersect with the lov extent. */
1306 static int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno,
1307 obd_off start, obd_off end,
1308 obd_off *obd_start, obd_off *obd_end)
1310 int start_side, end_side;
1312 start_side = lov_stripe_offset(lsm, start, stripeno, obd_start);
1313 end_side = lov_stripe_offset(lsm, end, stripeno, obd_end);
1315 CDEBUG(D_INODE, "["LPU64"->"LPU64"] -> [(%d) "LPU64"->"LPU64" (%d)]\n",
1316 start, end, start_side, *obd_start, *obd_end, end_side);
1318 /* this stripe doesn't intersect the file extent when neither
1319 * start or the end intersected the stripe and obd_start and
1320 * obd_end got rounded up to the save value. */
1321 if (start_side != 0 && end_side != 0 && *obd_start == *obd_end)
1324 /* as mentioned in the lov_stripe_offset commentary, end
1325 * might have been shifted in the wrong direction. This
1326 * happens when an end offset is before the stripe when viewed
1327 * through the "mod stripe size" math. we detect it being shifted
1328 * in the wrong direction and touch it up.
1329 * interestingly, this can't underflow since end must be > start
1330 * if we passed through the previous check.
1331 * (should we assert for that somewhere?) */
1338 /* compute which stripe number "lov_off" will be written into */
1339 static int lov_stripe_number(struct lov_stripe_md *lsm, obd_off lov_off)
1341 unsigned long ssize = lsm->lsm_stripe_size;
1342 unsigned long swidth = ssize * lsm->lsm_stripe_count;
1343 unsigned long stripe_off;
1345 stripe_off = do_div(lov_off, swidth);
1347 return stripe_off / ssize;
1350 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1351 * we can send this 'punch' to just the authoritative node and the nodes
1352 * that the punch will affect. */
1353 static int lov_punch(struct obd_export *exp, struct obdo *oa,
1354 struct lov_stripe_md *lsm,
1355 obd_off start, obd_off end, struct obd_trans_info *oti)
1358 struct lov_obd *lov;
1359 struct lov_oinfo *loi;
1363 if (lsm_bad_magic(lsm))
1366 if (!exp || !exp->exp_obd)
1369 lov = &exp->exp_obd->u.lov;
1370 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
1371 obd_off starti, endi;
1374 if (lov->tgts[loi->loi_ost_idx].active == 0) {
1375 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1379 if (!lov_stripe_intersects(lsm, i, start, end, &starti, &endi))
1382 /* create data objects with "parent" OA */
1383 memcpy(&tmp, oa, sizeof(tmp));
1384 tmp.o_id = loi->loi_id;
1386 err = obd_punch(lov->tgts[loi->loi_ost_idx].ltd_exp, &tmp, NULL,
1387 starti, endi, NULL);
1389 if (lov->tgts[loi->loi_ost_idx].active) {
1390 CERROR("error: punch objid "LPX64" subobj "LPX64
1391 " on OST idx %d: rc = %d\n", oa->o_id,
1392 loi->loi_id, loi->loi_ost_idx, err);
1397 loi->loi_kms = loi->loi_rss = starti;
1403 static int lov_sync(struct obd_export *exp, struct obdo *oa,
1404 struct lov_stripe_md *lsm, obd_off start, obd_off end)
1407 struct lov_obd *lov;
1408 struct lov_oinfo *loi;
1412 if (lsm_bad_magic(lsm))
1422 lov = &exp->exp_obd->u.lov;
1423 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
1424 obd_off starti, endi;
1427 if (lov->tgts[loi->loi_ost_idx].active == 0) {
1428 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1432 if (!lov_stripe_intersects(lsm, i, start, end, &starti, &endi))
1435 memcpy(tmp, oa, sizeof(*tmp));
1436 tmp->o_id = loi->loi_id;
1438 err = obd_sync(lov->tgts[loi->loi_ost_idx].ltd_exp, tmp, NULL,
1441 if (lov->tgts[loi->loi_ost_idx].active) {
1442 CERROR("error: fsync objid "LPX64" subobj "LPX64
1443 " on OST idx %d: rc = %d\n", oa->o_id,
1444 loi->loi_id, loi->loi_ost_idx, err);
1455 static int lov_brw_check(struct lov_obd *lov, struct obdo *oa,
1456 struct lov_stripe_md *lsm,
1457 obd_count oa_bufs, struct brw_page *pga)
1461 /* The caller just wants to know if there's a chance that this
1462 * I/O can succeed */
1463 for (i = 0; i < oa_bufs; i++) {
1464 int stripe = lov_stripe_number(lsm, pga[i].off);
1465 int ost = lsm->lsm_oinfo[stripe].loi_ost_idx;
1466 struct ldlm_extent ext, subext;
1467 ext.start = pga[i].off;
1468 ext.end = pga[i].off + pga[i].count;
1470 if (!lov_stripe_intersects(lsm, i, ext.start, ext.end,
1471 &subext.start, &subext.end))
1474 if (lov->tgts[ost].active == 0) {
1475 CDEBUG(D_HA, "lov idx %d inactive\n", ost);
1478 rc = obd_brw(OBD_BRW_CHECK, lov->tgts[stripe].ltd_exp, oa,
1479 NULL, 1, &pga[i], NULL);
1486 static int lov_brw(int cmd, struct obd_export *exp, struct obdo *src_oa,
1487 struct lov_stripe_md *lsm, obd_count oa_bufs,
1488 struct brw_page *pga, struct obd_trans_info *oti)
1494 struct lov_stripe_md lsm;
1496 } *stripeinfo, *si, *si_last;
1497 struct obdo *ret_oa = NULL, *tmp_oa = NULL;
1498 struct lov_obd *lov;
1499 struct brw_page *ioarr;
1500 struct lov_oinfo *loi;
1501 int rc = 0, i, *where, stripe_count = lsm->lsm_stripe_count, set = 0;
1504 if (lsm_bad_magic(lsm))
1507 lov = &exp->exp_obd->u.lov;
1509 if (cmd == OBD_BRW_CHECK) {
1510 rc = lov_brw_check(lov, src_oa, lsm, oa_bufs, pga);
1514 OBD_ALLOC(stripeinfo, stripe_count * sizeof(*stripeinfo));
1518 OBD_ALLOC(where, sizeof(*where) * oa_bufs);
1520 GOTO(out_sinfo, rc = -ENOMEM);
1522 OBD_ALLOC(ioarr, sizeof(*ioarr) * oa_bufs);
1524 GOTO(out_where, rc = -ENOMEM);
1527 ret_oa = obdo_alloc();
1529 GOTO(out_ioarr, rc = -ENOMEM);
1531 tmp_oa = obdo_alloc();
1533 GOTO(out_oa, rc = -ENOMEM);
1536 for (i = 0; i < oa_bufs; i++) {
1537 where[i] = lov_stripe_number(lsm, pga[i].off);
1538 stripeinfo[where[i]].bufct++;
1541 for (i = 0, loi = lsm->lsm_oinfo, si_last = si = stripeinfo;
1542 i < stripe_count; i++, loi++, si_last = si, si++) {
1544 si->index = si_last->index + si_last->bufct;
1545 si->lsm.lsm_object_id = loi->loi_id;
1546 si->ost_idx = loi->loi_ost_idx;
1549 for (i = 0; i < oa_bufs; i++) {
1550 int which = where[i];
1553 shift = stripeinfo[which].index + stripeinfo[which].subcount;
1554 LASSERT(shift < oa_bufs);
1555 ioarr[shift] = pga[i];
1556 lov_stripe_offset(lsm, pga[i].off, which, &ioarr[shift].off);
1557 stripeinfo[which].subcount++;
1560 for (i = 0, si = stripeinfo; i < stripe_count; i++, si++) {
1561 int shift = si->index;
1563 if (lov->tgts[si->ost_idx].active == 0) {
1564 CDEBUG(D_HA, "lov idx %d inactive\n", si->ost_idx);
1565 GOTO(out_oa, rc = -EIO);
1569 LASSERT(shift < oa_bufs);
1571 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
1573 tmp_oa->o_id = si->lsm.lsm_object_id;
1574 rc = obd_brw(cmd, lov->tgts[si->ost_idx].ltd_exp,
1575 tmp_oa, &si->lsm, si->bufct,
1576 &ioarr[shift], oti);
1578 GOTO(out_ioarr, rc);
1580 lov_merge_attrs(ret_oa, tmp_oa, tmp_oa->o_valid, lsm,
1585 ret_oa->o_id = src_oa->o_id;
1586 memcpy(src_oa, ret_oa, sizeof(*src_oa));
1595 OBD_FREE(ioarr, sizeof(*ioarr) * oa_bufs);
1597 OBD_FREE(where, sizeof(*where) * oa_bufs);
1599 OBD_FREE(stripeinfo, stripe_count * sizeof(*stripeinfo));
1603 static int lov_brw_interpret(struct ptlrpc_request_set *reqset, void *data,
1606 struct lov_brw_async_args *aa = data;
1607 struct lov_stripe_md *lsm = aa->aa_lsm;
1608 obd_count oa_bufs = aa->aa_oa_bufs;
1609 struct obdo *oa = aa->aa_oa;
1610 struct obdo *obdos = aa->aa_obdos;
1611 struct brw_page *ioarr = aa->aa_ioarr;
1612 struct lov_oinfo *loi;
1617 /* NB all stripe requests succeeded to get here */
1619 for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
1621 if (obdos[i].o_valid == 0) /* inactive stripe */
1624 lov_merge_attrs(oa, &obdos[i], obdos[i].o_valid, lsm,
1629 CERROR("No stripes had valid attrs\n");
1633 oa->o_id = lsm->lsm_object_id;
1635 OBD_FREE(obdos, lsm->lsm_stripe_count * sizeof(*obdos));
1636 OBD_FREE(ioarr, sizeof(*ioarr) * oa_bufs);
1640 static int lov_brw_async(int cmd, struct obd_export *exp, struct obdo *oa,
1641 struct lov_stripe_md *lsm, obd_count oa_bufs,
1642 struct brw_page *pga, struct ptlrpc_request_set *set,
1643 struct obd_trans_info *oti)
1649 struct lov_stripe_md lsm;
1651 } *stripeinfo, *si, *si_last;
1652 struct lov_obd *lov;
1653 struct brw_page *ioarr;
1654 struct obdo *obdos = NULL;
1655 struct lov_oinfo *loi;
1656 struct lov_brw_async_args *aa;
1657 int rc = 0, i, *where, stripe_count = lsm->lsm_stripe_count;
1660 if (lsm_bad_magic(lsm))
1663 lov = &exp->exp_obd->u.lov;
1665 if (cmd == OBD_BRW_CHECK) {
1666 rc = lov_brw_check(lov, oa, lsm, oa_bufs, pga);
1670 OBD_ALLOC(stripeinfo, stripe_count * sizeof(*stripeinfo));
1674 OBD_ALLOC(where, sizeof(*where) * oa_bufs);
1676 GOTO(out_sinfo, rc = -ENOMEM);
1679 OBD_ALLOC(obdos, sizeof(*obdos) * stripe_count);
1681 GOTO(out_where, rc = -ENOMEM);
1684 OBD_ALLOC(ioarr, sizeof(*ioarr) * oa_bufs);
1686 GOTO(out_obdos, rc = -ENOMEM);
1688 for (i = 0; i < oa_bufs; i++) {
1689 where[i] = lov_stripe_number(lsm, pga[i].off);
1690 stripeinfo[where[i]].bufct++;
1693 for (i = 0, loi = lsm->lsm_oinfo, si_last = si = stripeinfo;
1694 i < stripe_count; i++, loi++, si_last = si, si++) {
1696 si->index = si_last->index + si_last->bufct;
1697 si->lsm.lsm_object_id = loi->loi_id;
1698 si->ost_idx = loi->loi_ost_idx;
1701 memcpy(&obdos[i], oa, sizeof(*obdos));
1702 obdos[i].o_id = si->lsm.lsm_object_id;
1706 for (i = 0; i < oa_bufs; i++) {
1707 int which = where[i];
1710 shift = stripeinfo[which].index + stripeinfo[which].subcount;
1711 LASSERT(shift < oa_bufs);
1712 ioarr[shift] = pga[i];
1713 lov_stripe_offset(lsm, pga[i].off, which, &ioarr[shift].off);
1714 stripeinfo[which].subcount++;
1717 for (i = 0, si = stripeinfo; i < stripe_count; i++, si++) {
1718 int shift = si->index;
1723 if (lov->tgts[si->ost_idx].active == 0) {
1724 CDEBUG(D_HA, "lov idx %d inactive\n", si->ost_idx);
1725 GOTO(out_ioarr, rc = -EIO);
1728 LASSERT(shift < oa_bufs);
1730 rc = obd_brw_async(cmd, lov->tgts[si->ost_idx].ltd_exp,
1731 &obdos[i], &si->lsm, si->bufct,
1732 &ioarr[shift], set, oti);
1734 GOTO(out_ioarr, rc);
1737 LASSERT(set->set_interpret == NULL);
1738 set->set_interpret = (set_interpreter_func)lov_brw_interpret;
1739 LASSERT(sizeof(set->set_args) >= sizeof(struct lov_brw_async_args));
1740 aa = (struct lov_brw_async_args *)&set->set_args;
1742 aa->aa_obdos = obdos;
1744 aa->aa_ioarr = ioarr;
1745 aa->aa_oa_bufs = oa_bufs;
1747 /* Don't free ioarr or obdos - that's done in lov_brw_interpret */
1748 GOTO(out_where, rc);
1751 OBD_FREE(ioarr, sizeof(*ioarr) * oa_bufs);
1753 OBD_FREE(obdos, stripe_count * sizeof(*obdos));
1755 OBD_FREE(where, sizeof(*where) * oa_bufs);
1757 OBD_FREE(stripeinfo, stripe_count * sizeof(*stripeinfo));
1761 struct lov_async_page *lap_from_cookie(void *cookie)
1763 struct lov_async_page *lap = cookie;
1764 if (lap->lap_magic != LAP_MAGIC)
1765 return ERR_PTR(-EINVAL);
1769 static int lov_ap_make_ready(void *data, int cmd)
1771 struct lov_async_page *lap = lap_from_cookie(data);
1772 /* XXX should these assert? */
1776 return lap->lap_caller_ops->ap_make_ready(lap->lap_caller_data, cmd);
1778 static int lov_ap_refresh_count(void *data, int cmd)
1780 struct lov_async_page *lap = lap_from_cookie(data);
1784 return lap->lap_caller_ops->ap_refresh_count(lap->lap_caller_data,
1787 static void lov_ap_fill_obdo(void *data, int cmd, struct obdo *oa)
1789 struct lov_async_page *lap = lap_from_cookie(data);
1790 /* XXX should these assert? */
1794 lap->lap_caller_ops->ap_fill_obdo(lap->lap_caller_data, cmd, oa);
1795 /* XXX woah, shouldn't we be altering more here? size? */
1796 oa->o_id = lap->lap_loi_id;
1799 static void lov_ap_completion(void *data, int cmd, struct obdo *oa, int rc)
1801 struct lov_async_page *lap = lap_from_cookie(data);
1805 /* in a raid1 regime this would down a count of many ios
1806 * in flight, onl calling the caller_ops completion when all
1807 * the raid1 ios are complete */
1808 lap->lap_caller_ops->ap_completion(lap->lap_caller_data, cmd, oa, rc);
1811 static struct obd_async_page_ops lov_async_page_ops = {
1812 .ap_make_ready = lov_ap_make_ready,
1813 .ap_refresh_count = lov_ap_refresh_count,
1814 .ap_fill_obdo = lov_ap_fill_obdo,
1815 .ap_completion = lov_ap_completion,
1818 int lov_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
1819 struct lov_oinfo *loi, struct page *page,
1820 obd_off offset, struct obd_async_page_ops *ops,
1821 void *data, void **res)
1823 struct lov_obd *lov = &exp->exp_obd->u.lov;
1824 struct lov_async_page *lap;
1828 if (lsm_bad_magic(lsm))
1830 LASSERT(loi == NULL);
1832 OBD_ALLOC(lap, sizeof(*lap));
1836 lap->lap_magic = LAP_MAGIC;
1837 lap->lap_caller_ops = ops;
1838 lap->lap_caller_data = data;
1840 /* for now only raid 0 which passes through */
1841 lap->lap_stripe = lov_stripe_number(lsm, offset);
1842 lov_stripe_offset(lsm, offset, lap->lap_stripe, &lap->lap_sub_offset);
1843 loi = &lsm->lsm_oinfo[lap->lap_stripe];
1845 /* so the callback doesn't need the lsm */
1846 lap->lap_loi_id = loi->loi_id;
1848 rc = obd_prep_async_page(lov->tgts[loi->loi_ost_idx].ltd_exp,
1849 lsm, loi, page, lap->lap_sub_offset,
1850 &lov_async_page_ops, lap,
1851 &lap->lap_sub_cookie);
1853 OBD_FREE(lap, sizeof(*lap));
1856 CDEBUG(D_CACHE, "lap %p page %p cookie %p off "LPU64"\n", lap, page,
1857 lap->lap_sub_cookie, offset);
1862 static int lov_queue_async_io(struct obd_export *exp,
1863 struct lov_stripe_md *lsm,
1864 struct lov_oinfo *loi, void *cookie,
1865 int cmd, obd_off off, int count,
1866 obd_flag brw_flags, obd_flag async_flags)
1868 struct lov_obd *lov = &exp->exp_obd->u.lov;
1869 struct lov_async_page *lap;
1872 LASSERT(loi == NULL);
1874 if (lsm_bad_magic(lsm))
1877 lap = lap_from_cookie(cookie);
1879 RETURN(PTR_ERR(lap));
1881 loi = &lsm->lsm_oinfo[lap->lap_stripe];
1882 rc = obd_queue_async_io(lov->tgts[loi->loi_ost_idx].ltd_exp, lsm,
1883 loi, lap->lap_sub_cookie, cmd, off, count,
1884 brw_flags, async_flags);
1888 static int lov_set_async_flags(struct obd_export *exp,
1889 struct lov_stripe_md *lsm,
1890 struct lov_oinfo *loi, void *cookie,
1891 obd_flag async_flags)
1893 struct lov_obd *lov = &exp->exp_obd->u.lov;
1894 struct lov_async_page *lap;
1897 LASSERT(loi == NULL);
1899 if (lsm_bad_magic(lsm))
1902 lap = lap_from_cookie(cookie);
1904 RETURN(PTR_ERR(lap));
1906 loi = &lsm->lsm_oinfo[lap->lap_stripe];
1907 rc = obd_set_async_flags(lov->tgts[loi->loi_ost_idx].ltd_exp,
1908 lsm, loi, lap->lap_sub_cookie, async_flags);
1912 static int lov_queue_group_io(struct obd_export *exp,
1913 struct lov_stripe_md *lsm,
1914 struct lov_oinfo *loi,
1915 struct obd_io_group *oig, void *cookie,
1916 int cmd, obd_off off, int count,
1917 obd_flag brw_flags, obd_flag async_flags)
1919 struct lov_obd *lov = &exp->exp_obd->u.lov;
1920 struct lov_async_page *lap;
1923 LASSERT(loi == NULL);
1925 if (lsm_bad_magic(lsm))
1928 lap = lap_from_cookie(cookie);
1930 RETURN(PTR_ERR(lap));
1932 loi = &lsm->lsm_oinfo[lap->lap_stripe];
1933 rc = obd_queue_group_io(lov->tgts[loi->loi_ost_idx].ltd_exp, lsm, loi,
1934 oig, lap->lap_sub_cookie, cmd, off, count,
1935 brw_flags, async_flags);
1939 /* this isn't exactly optimal. we may have queued sync io in oscs on
1940 * all stripes, but we don't record that fact at queue time. so we
1941 * trigger sync io on all stripes. */
1942 static int lov_trigger_group_io(struct obd_export *exp,
1943 struct lov_stripe_md *lsm,
1944 struct lov_oinfo *loi,
1945 struct obd_io_group *oig)
1947 struct lov_obd *lov = &exp->exp_obd->u.lov;
1950 LASSERT(loi == NULL);
1952 if (lsm_bad_magic(lsm))
1955 for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
1957 err = obd_trigger_group_io(lov->tgts[loi->loi_ost_idx].ltd_exp,
1959 if (rc == 0 && err != 0)
1965 static int lov_teardown_async_page(struct obd_export *exp,
1966 struct lov_stripe_md *lsm,
1967 struct lov_oinfo *loi, void *cookie)
1969 struct lov_obd *lov = &exp->exp_obd->u.lov;
1970 struct lov_async_page *lap;
1973 LASSERT(loi == NULL);
1975 if (lsm_bad_magic(lsm))
1978 lap = lap_from_cookie(cookie);
1980 RETURN(PTR_ERR(lap));
1982 loi = &lsm->lsm_oinfo[lap->lap_stripe];
1983 rc = obd_teardown_async_page(lov->tgts[loi->loi_ost_idx].ltd_exp,
1984 lsm, loi, lap->lap_sub_cookie);
1986 CERROR("unable to teardown sub cookie %p: %d\n",
1987 lap->lap_sub_cookie, rc);
1990 OBD_FREE(lap, sizeof(*lap));
1994 static int lov_enqueue(struct obd_export *exp, struct lov_stripe_md *lsm,
1995 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
1996 int *flags, void *bl_cb, void *cp_cb, void *gl_cb,
1997 void *data,__u32 lvb_len, void *lvb_swabber,
1998 struct lustre_handle *lockh)
2000 struct lov_lock_handles *lov_lockh = NULL;
2001 struct lustre_handle *lov_lockhp;
2002 struct lov_obd *lov;
2003 struct lov_oinfo *loi;
2004 char submd_buf[sizeof(struct lov_stripe_md) + sizeof(struct lov_oinfo)];
2005 struct lov_stripe_md *submd = (void *)submd_buf;
2007 int i, save_flags = *flags;
2010 if (lsm_bad_magic(lsm))
2013 /* we should never be asked to replay a lock this way. */
2014 LASSERT((*flags & LDLM_FL_REPLAY) == 0);
2016 if (!exp || !exp->exp_obd)
2019 if (lsm->lsm_stripe_count > 1) {
2020 lov_lockh = lov_llh_new(lsm);
2021 if (lov_lockh == NULL)
2024 lockh->cookie = lov_lockh->llh_handle.h_cookie;
2025 lov_lockhp = lov_lockh->llh_handles;
2030 lov = &exp->exp_obd->u.lov;
2031 for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
2032 i++, loi++, lov_lockhp++) {
2033 ldlm_policy_data_t sub_ext;
2035 if (!lov_stripe_intersects(lsm, i, policy->l_extent.start,
2036 policy->l_extent.end,
2037 &sub_ext.l_extent.start,
2038 &sub_ext.l_extent.end))
2041 sub_ext.l_extent.gid = policy->l_extent.gid;
2043 if (lov->tgts[loi->loi_ost_idx].active == 0) {
2044 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
2048 /* XXX LOV STACKING: submd should be from the subobj */
2049 submd->lsm_object_id = loi->loi_id;
2050 submd->lsm_stripe_count = 0;
2051 submd->lsm_oinfo->loi_kms_valid = loi->loi_kms_valid;
2052 submd->lsm_oinfo->loi_rss = loi->loi_rss;
2053 submd->lsm_oinfo->loi_kms = loi->loi_kms;
2054 submd->lsm_oinfo->loi_blocks = loi->loi_blocks;
2055 loi->loi_mtime = submd->lsm_oinfo->loi_mtime;
2056 /* XXX submd is not fully initialized here */
2057 *flags = save_flags;
2058 rc = obd_enqueue(lov->tgts[loi->loi_ost_idx].ltd_exp, submd,
2059 type, &sub_ext, mode, flags, bl_cb, cp_cb,
2060 gl_cb, data, lvb_len, lvb_swabber, lov_lockhp);
2062 /* XXX FIXME: This unpleasantness doesn't belong here at *all*.
2063 * It belongs in the OSC, except that the OSC doesn't have
2064 * access to the real LOI -- it gets a copy, that we created
2065 * above, and that copy can be arbitrarily out of date.
2067 * The LOV API is due for a serious rewriting anyways, and this
2068 * can be addressed then. */
2069 if (rc == ELDLM_OK) {
2070 struct ldlm_lock *lock = ldlm_handle2lock(lov_lockhp);
2071 __u64 tmp = submd->lsm_oinfo->loi_rss;
2073 LASSERT(lock != NULL);
2075 loi->loi_blocks = submd->lsm_oinfo->loi_blocks;
2076 /* Extend KMS up to the end of this lock and no further
2077 * A lock on [x,y] means a KMS of up to y + 1 bytes! */
2078 if (tmp > lock->l_policy_data.l_extent.end)
2079 tmp = lock->l_policy_data.l_extent.end + 1;
2080 if (tmp >= loi->loi_kms) {
2081 CDEBUG(D_INODE, "lock acquired, setting rss="
2082 LPU64", kms="LPU64"\n", loi->loi_rss,
2085 loi->loi_kms_valid = 1;
2087 CDEBUG(D_INODE, "lock acquired, setting rss="
2088 LPU64"; leaving kms="LPU64", end="LPU64
2089 "\n", loi->loi_rss, loi->loi_kms,
2090 lock->l_policy_data.l_extent.end);
2092 ldlm_lock_allow_match(lock);
2093 LDLM_LOCK_PUT(lock);
2094 } else if (rc == ELDLM_LOCK_ABORTED &&
2095 save_flags & LDLM_FL_HAS_INTENT) {
2096 memset(lov_lockhp, 0, sizeof(*lov_lockhp));
2097 loi->loi_rss = submd->lsm_oinfo->loi_rss;
2098 loi->loi_blocks = submd->lsm_oinfo->loi_blocks;
2099 CDEBUG(D_INODE, "glimpsed, setting rss="LPU64"; leaving"
2100 " kms="LPU64"\n", loi->loi_rss, loi->loi_kms);
2102 memset(lov_lockhp, 0, sizeof(*lov_lockhp));
2103 if (lov->tgts[loi->loi_ost_idx].active) {
2104 CERROR("error: enqueue objid "LPX64" subobj "
2105 LPX64" on OST idx %d: rc = %d\n",
2106 lsm->lsm_object_id, loi->loi_id,
2107 loi->loi_ost_idx, rc);
2108 GOTO(out_locks, rc);
2112 if (lsm->lsm_stripe_count > 1)
2113 lov_llh_put(lov_lockh);
2117 while (loi--, lov_lockhp--, i-- > 0) {
2118 struct lov_stripe_md submd;
2121 if (lov_lockhp->cookie == 0)
2124 /* XXX LOV STACKING: submd should be from the subobj */
2125 submd.lsm_object_id = loi->loi_id;
2126 submd.lsm_stripe_count = 0;
2127 err = obd_cancel(lov->tgts[loi->loi_ost_idx].ltd_exp, &submd,
2129 if (err && lov->tgts[loi->loi_ost_idx].active) {
2130 CERROR("error: cancelling objid "LPX64" on OST "
2131 "idx %d after enqueue error: rc = %d\n",
2132 loi->loi_id, loi->loi_ost_idx, err);
2136 if (lsm->lsm_stripe_count > 1) {
2137 lov_llh_destroy(lov_lockh);
2138 lov_llh_put(lov_lockh);
2143 static int lov_match(struct obd_export *exp, struct lov_stripe_md *lsm,
2144 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
2145 int *flags, void *data, struct lustre_handle *lockh)
2147 struct lov_lock_handles *lov_lockh = NULL;
2148 struct lustre_handle *lov_lockhp;
2149 struct lov_obd *lov;
2150 struct lov_oinfo *loi;
2151 struct lov_stripe_md submd;
2152 ldlm_error_t rc = 0;
2156 if (lsm_bad_magic(lsm))
2159 if (!exp || !exp->exp_obd)
2162 if (lsm->lsm_stripe_count > 1) {
2163 lov_lockh = lov_llh_new(lsm);
2164 if (lov_lockh == NULL)
2167 lockh->cookie = lov_lockh->llh_handle.h_cookie;
2168 lov_lockhp = lov_lockh->llh_handles;
2173 lov = &exp->exp_obd->u.lov;
2174 for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
2175 i++, loi++, lov_lockhp++) {
2176 ldlm_policy_data_t sub_ext;
2179 if (!lov_stripe_intersects(lsm, i, policy->l_extent.start,
2180 policy->l_extent.end,
2181 &sub_ext.l_extent.start,
2182 &sub_ext.l_extent.end))
2185 if (lov->tgts[loi->loi_ost_idx].active == 0) {
2186 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
2191 /* XXX LOV STACKING: submd should be from the subobj */
2192 submd.lsm_object_id = loi->loi_id;
2193 submd.lsm_stripe_count = 0;
2195 /* XXX submd is not fully initialized here */
2196 rc = obd_match(lov->tgts[loi->loi_ost_idx].ltd_exp, &submd,
2197 type, &sub_ext, mode, &lov_flags, data,
2203 if (lsm->lsm_stripe_count > 1) {
2204 if (*flags & LDLM_FL_TEST_LOCK)
2205 lov_llh_destroy(lov_lockh);
2206 lov_llh_put(lov_lockh);
2211 while (loi--, lov_lockhp--, i-- > 0) {
2212 struct lov_stripe_md submd;
2215 if (lov_lockhp->cookie == 0)
2218 /* XXX LOV STACKING: submd should be from the subobj */
2219 submd.lsm_object_id = loi->loi_id;
2220 submd.lsm_stripe_count = 0;
2221 err = obd_cancel(lov->tgts[loi->loi_ost_idx].ltd_exp, &submd,
2223 if (err && lov->tgts[loi->loi_ost_idx].active) {
2224 CERROR("error: cancelling objid "LPX64" on OST "
2225 "idx %d after match failure: rc = %d\n",
2226 loi->loi_id, loi->loi_ost_idx, err);
2230 if (lsm->lsm_stripe_count > 1) {
2231 lov_llh_destroy(lov_lockh);
2232 lov_llh_put(lov_lockh);
2237 static int lov_change_cbdata(struct obd_export *exp,
2238 struct lov_stripe_md *lsm, ldlm_iterator_t it,
2241 struct lov_obd *lov;
2242 struct lov_oinfo *loi;
2246 if (lsm_bad_magic(lsm))
2249 if (!exp || !exp->exp_obd)
2252 lov = &exp->exp_obd->u.lov;
2253 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
2254 struct lov_stripe_md submd;
2255 if (lov->tgts[loi->loi_ost_idx].active == 0)
2256 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
2258 submd.lsm_object_id = loi->loi_id;
2259 submd.lsm_stripe_count = 0;
2260 rc = obd_change_cbdata(lov->tgts[loi->loi_ost_idx].ltd_exp,
2266 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
2267 __u32 mode, struct lustre_handle *lockh)
2269 struct lov_lock_handles *lov_lockh = NULL;
2270 struct lustre_handle *lov_lockhp;
2271 struct lov_obd *lov;
2272 struct lov_oinfo *loi;
2276 if (lsm_bad_magic(lsm))
2279 if (!exp || !exp->exp_obd)
2283 if (lsm->lsm_stripe_count > 1) {
2284 lov_lockh = lov_handle2llh(lockh);
2286 CERROR("LOV: invalid lov lock handle %p\n", lockh);
2290 lov_lockhp = lov_lockh->llh_handles;
2295 lov = &exp->exp_obd->u.lov;
2296 for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
2297 i++, loi++, lov_lockhp++) {
2298 struct lov_stripe_md submd;
2301 if (lov_lockhp->cookie == 0) {
2302 CDEBUG(D_HA, "lov idx %d subobj "LPX64" no lock?\n",
2303 loi->loi_ost_idx, loi->loi_id);
2307 /* XXX LOV STACKING: submd should be from the subobj */
2308 submd.lsm_object_id = loi->loi_id;
2309 submd.lsm_stripe_count = 0;
2310 err = obd_cancel(lov->tgts[loi->loi_ost_idx].ltd_exp, &submd,
2313 if (lov->tgts[loi->loi_ost_idx].active) {
2314 CERROR("error: cancel objid "LPX64" subobj "
2315 LPX64" on OST idx %d: rc = %d\n",
2317 loi->loi_id, loi->loi_ost_idx, err);
2324 if (lsm->lsm_stripe_count > 1)
2325 lov_llh_destroy(lov_lockh);
2326 if (lov_lockh != NULL)
2327 lov_llh_put(lov_lockh);
2331 static int lov_cancel_unused(struct obd_export *exp,
2332 struct lov_stripe_md *lsm, int flags, void *opaque)
2334 struct lov_obd *lov;
2335 struct lov_oinfo *loi;
2339 if (lsm_bad_magic(lsm))
2342 if (!exp || !exp->exp_obd)
2345 lov = &exp->exp_obd->u.lov;
2346 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
2347 struct lov_stripe_md submd;
2350 if (lov->tgts[loi->loi_ost_idx].active == 0)
2351 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
2353 submd.lsm_object_id = loi->loi_id;
2354 submd.lsm_stripe_count = 0;
2355 err = obd_cancel_unused(lov->tgts[loi->loi_ost_idx].ltd_exp,
2356 &submd, flags, opaque);
2357 if (err && lov->tgts[loi->loi_ost_idx].active) {
2358 CERROR("error: cancel unused objid "LPX64" subobj "LPX64
2359 " on OST idx %d: rc = %d\n", lsm->lsm_object_id,
2360 loi->loi_id, loi->loi_ost_idx, err);
2368 #define LOV_U64_MAX ((__u64)~0ULL)
2369 #define LOV_SUM_MAX(tot, add) \
2371 if ((tot) + (add) < (tot)) \
2372 (tot) = LOV_U64_MAX; \
2377 static int lov_statfs(struct obd_device *obd, struct obd_statfs *osfs,
2378 unsigned long max_age)
2380 struct lov_obd *lov = &obd->u.lov;
2381 struct obd_statfs lov_sfs;
2388 /* We only get block data from the OBD */
2389 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2392 if (!lov->tgts[i].active) {
2393 CDEBUG(D_HA, "lov idx %d inactive\n", i);
2397 err = obd_statfs(class_exp2obd(lov->tgts[i].ltd_exp), &lov_sfs,
2400 if (lov->tgts[i].active && !rc)
2406 memcpy(osfs, &lov_sfs, sizeof(lov_sfs));
2409 osfs->os_bfree += lov_sfs.os_bfree;
2410 osfs->os_bavail += lov_sfs.os_bavail;
2411 osfs->os_blocks += lov_sfs.os_blocks;
2412 /* XXX not sure about this one - depends on policy.
2413 * - could be minimum if we always stripe on all OBDs
2414 * (but that would be wrong for any other policy,
2415 * if one of the OBDs has no more objects left)
2416 * - could be sum if we stripe whole objects
2417 * - could be average, just to give a nice number
2419 * To give a "reasonable" (if not wholly accurate)
2420 * number, we divide the total number of free objects
2421 * by expected stripe count (watch out for overflow).
2423 LOV_SUM_MAX(osfs->os_files, lov_sfs.os_files);
2424 LOV_SUM_MAX(osfs->os_ffree, lov_sfs.os_ffree);
2429 __u32 expected_stripes = lov->desc.ld_default_stripe_count ?
2430 lov->desc.ld_default_stripe_count :
2431 lov->desc.ld_active_tgt_count;
2433 if (osfs->os_files != LOV_U64_MAX)
2434 do_div(osfs->os_files, expected_stripes);
2435 if (osfs->os_ffree != LOV_U64_MAX)
2436 do_div(osfs->os_ffree, expected_stripes);
2443 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2444 void *karg, void *uarg)
2446 struct obd_device *obddev = class_exp2obd(exp);
2447 struct lov_obd *lov = &obddev->u.lov;
2448 int i, count = lov->desc.ld_tgt_count;
2449 struct obd_uuid *uuidp;
2455 case OBD_IOC_LOV_GET_CONFIG: {
2456 struct obd_ioctl_data *data = karg;
2457 struct lov_tgt_desc *tgtdesc;
2458 struct lov_desc *desc;
2463 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
2466 data = (struct obd_ioctl_data *)buf;
2468 if (sizeof(*desc) > data->ioc_inllen1) {
2473 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
2478 desc = (struct lov_desc *)data->ioc_inlbuf1;
2479 memcpy(desc, &(lov->desc), sizeof(*desc));
2481 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
2482 tgtdesc = lov->tgts;
2483 for (i = 0; i < count; i++, uuidp++, tgtdesc++)
2484 obd_str2uuid(uuidp, tgtdesc->uuid.uuid);
2486 rc = copy_to_user((void *)uarg, buf, len);
2489 obd_ioctl_freedata(buf, len);
2492 case LL_IOC_LOV_SETSTRIPE:
2493 rc = lov_setstripe(exp, karg, uarg);
2495 case LL_IOC_LOV_GETSTRIPE:
2496 rc = lov_getstripe(exp, karg, uarg);
2498 case LL_IOC_LOV_SETEA:
2499 rc = lov_setea(exp, karg, uarg);
2506 for (i = 0; i < count; i++) {
2509 err = obd_iocontrol(cmd, lov->tgts[i].ltd_exp,
2512 if (lov->tgts[i].active) {
2513 CERROR("error: iocontrol OSC %s on OST"
2514 "idx %d: err = %d\n",
2515 lov->tgts[i].uuid.uuid, i, err);
2530 static int lov_get_info(struct obd_export *exp, __u32 keylen,
2531 void *key, __u32 *vallen, void *val)
2533 struct obd_device *obddev = class_exp2obd(exp);
2534 struct lov_obd *lov = &obddev->u.lov;
2538 if (!vallen || !val)
2541 if (keylen > strlen("lock_to_stripe") &&
2542 strcmp(key, "lock_to_stripe") == 0) {
2545 struct ldlm_lock *lock;
2546 struct lov_stripe_md *lsm;
2548 struct lov_oinfo *loi;
2549 __u32 *stripe = val;
2551 if (*vallen < sizeof(*stripe))
2553 *vallen = sizeof(*stripe);
2555 /* XXX This is another one of those bits that will need to
2556 * change if we ever actually support nested LOVs. It uses
2557 * the lock's export to find out which stripe it is. */
2558 for (i = 0, loi = data->lsm->lsm_oinfo;
2559 i < data->lsm->lsm_stripe_count;
2561 if (lov->tgts[loi->loi_ost_idx].ltd_exp ==
2562 data->lock->l_conn_export) {
2568 } else if (keylen >= strlen("size_to_stripe") &&
2569 strcmp(key, "size_to_stripe") == 0) {
2573 struct lov_stripe_md *lsm;
2576 if (*vallen < sizeof(*data))
2579 data->size = lov_size_to_stripe(data->lsm, data->size,
2580 data->stripe_number);
2582 } else if (keylen >= strlen("last_id") && strcmp(key, "last_id") == 0) {
2584 int rc, size = sizeof(obd_id);
2585 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2586 if (!lov->tgts[i].active)
2588 rc = obd_get_info(lov->tgts[i].ltd_exp, keylen, key,
2594 } else if (keylen >= strlen("lovdesc") && strcmp(key, "lovdesc") == 0) {
2595 struct lov_desc *desc_ret = val;
2596 *desc_ret = lov->desc;
2604 static int lov_set_info(struct obd_export *exp, obd_count keylen,
2605 void *key, obd_count vallen, void *val)
2607 struct obd_device *obddev = class_exp2obd(exp);
2608 struct lov_obd *lov = &obddev->u.lov;
2612 #define KEY_IS(str) \
2613 (keylen == strlen(str) && memcmp(key, str, keylen) == 0)
2615 if (KEY_IS("next_id")) {
2616 if (vallen != lov->desc.ld_tgt_count)
2618 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2621 /* initialize all OSCs, even inactive ones */
2623 er = obd_set_info(lov->tgts[i].ltd_exp, keylen, key,
2624 sizeof(obd_id), ((obd_id*)val) + i);
2631 if (KEY_IS("growth_count")) {
2632 if (vallen != sizeof(int))
2634 } else if (KEY_IS("mds_conn") || KEY_IS("unlinked")) {
2641 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2644 if (val && !obd_uuid_equals(val, &lov->tgts[i].uuid))
2647 if (!val && !lov->tgts[i].active)
2650 er = obd_set_info(lov->tgts[i].ltd_exp, keylen, key, vallen,
2660 /* Merge rss if kms == 0
2662 * Even when merging RSS, we will take the KMS value if it's larger.
2663 * This prevents getattr from stomping on dirty cached pages which
2664 * extend the file size. */
2665 __u64 lov_merge_size(struct lov_stripe_md *lsm, int kms)
2667 struct lov_oinfo *loi;
2671 for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
2673 obd_size lov_size, tmpsize;
2675 tmpsize = loi->loi_kms;
2676 if (kms == 0 && loi->loi_rss > tmpsize)
2677 tmpsize = loi->loi_rss;
2679 lov_size = lov_stripe_size(lsm, tmpsize, i);
2680 if (lov_size > size)
2685 EXPORT_SYMBOL(lov_merge_size);
2688 __u64 lov_merge_blocks(struct lov_stripe_md *lsm)
2690 struct lov_oinfo *loi;
2694 for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
2696 blocks += loi->loi_blocks;
2700 EXPORT_SYMBOL(lov_merge_blocks);
2702 __u64 lov_merge_mtime(struct lov_stripe_md *lsm, __u64 current_time)
2704 struct lov_oinfo *loi;
2707 for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
2709 if (loi->loi_mtime > current_time)
2710 current_time = loi->loi_mtime;
2712 return current_time;
2714 EXPORT_SYMBOL(lov_merge_mtime);
2717 struct lov_multi_wait {
2718 struct ldlm_lock *lock;
2724 int lov_complete_many(struct obd_export *exp, struct lov_stripe_md *lsm,
2725 struct lustre_handle *lockh)
2727 struct lov_lock_handles *lov_lockh = NULL;
2728 struct lustre_handle *lov_lockhp;
2729 struct lov_obd *lov;
2730 struct lov_oinfo *loi;
2731 struct lov_multi_wait *queues;
2735 if (lsm_bad_magic(lsm))
2738 if (!exp || !exp->exp_obd)
2741 LASSERT(lockh != NULL);
2742 if (lsm->lsm_stripe_count > 1) {
2743 lov_lockh = lov_handle2llh(lockh);
2744 if (lov_lockh == NULL) {
2745 CERROR("LOV: invalid lov lock handle %p\n", lockh);
2749 lov_lockhp = lov_lockh->llh_handles;
2754 OBD_ALLOC(queues, lsm->lsm_stripe_count * sizeof(*queues));
2756 GOTO(out, rc = -ENOMEM);
2758 lov = &exp->exp_obd->u.lov;
2759 for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
2760 i++, loi++, lov_lockhp++) {
2761 struct ldlm_lock *lock;
2762 struct obd_device *obd;
2763 unsigned long irqflags;
2765 lock = ldlm_handle2lock(lov_lockhp);
2767 CDEBUG(D_HA, "lov idx %d subobj "LPX64" no lock?\n",
2768 loi->loi_ost_idx, loi->loi_id);
2769 queues[i].completed = 1;
2773 queues[i].lock = lock;
2774 init_waitqueue_entry(&(queues[i].wait), current);
2775 add_wait_queue(lock->l_waitq, &(queues[i].wait));
2777 obd = class_exp2obd(lock->l_conn_export);
2779 imp = obd->u.cli.cl_import;
2781 spin_lock_irqsave(&imp->imp_lock, irqflags);
2782 queues[i].generation = imp->imp_generation;
2783 spin_unlock_irqrestore(&imp->imp_lock, irqflags);
2787 lwi = LWI_TIMEOUT_INTR(obd_timeout * HZ, ldlm_expired_completion_wait,
2788 interrupted_completion_wait, &lwd);
2789 rc = l_wait_event_added(check_multi_complete(queues, lsm), &lwi);
2791 for (i = 0; i < lsm->lsm_stripe_count; i++)
2792 remove_wait_queue(lock->l_waitq, &(queues[i].wait));
2794 if (rc == -EINTR || rc == -ETIMEDOUT) {
2800 if (lov_lockh != NULL)
2801 lov_llh_put(lov_lockh);
2806 void lov_increase_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
2809 struct lov_oinfo *loi;
2815 stripe = lov_stripe_number(lsm, size - 1);
2816 kms = lov_size_to_stripe(lsm, size, stripe);
2817 loi = &(lsm->lsm_oinfo[stripe]);
2819 CDEBUG(D_INODE, "stripe %d KMS %sincreasing "LPU64"->"LPU64"\n",
2820 stripe, kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms);
2821 if (kms > loi->loi_kms)
2825 EXPORT_SYMBOL(lov_increase_kms);
2827 struct obd_ops lov_obd_ops = {
2828 o_owner: THIS_MODULE,
2830 o_cleanup: lov_cleanup,
2831 o_connect: lov_connect,
2832 o_disconnect: lov_disconnect,
2833 o_statfs: lov_statfs,
2834 o_packmd: lov_packmd,
2835 o_unpackmd: lov_unpackmd,
2836 o_create: lov_create,
2837 o_destroy: lov_destroy,
2838 o_getattr: lov_getattr,
2839 o_getattr_async: lov_getattr_async,
2840 o_setattr: lov_setattr,
2842 o_brw_async: lov_brw_async,
2843 .o_prep_async_page = lov_prep_async_page,
2844 .o_queue_async_io = lov_queue_async_io,
2845 .o_set_async_flags = lov_set_async_flags,
2846 .o_queue_group_io = lov_queue_group_io,
2847 .o_trigger_group_io = lov_trigger_group_io,
2848 .o_teardown_async_page lov_teardown_async_page,
2851 o_enqueue: lov_enqueue,
2853 o_change_cbdata: lov_change_cbdata,
2854 o_cancel: lov_cancel,
2855 o_cancel_unused: lov_cancel_unused,
2856 o_iocontrol: lov_iocontrol,
2857 o_get_info: lov_get_info,
2858 o_set_info: lov_set_info,
2859 o_llog_init: lov_llog_init,
2860 o_llog_finish: lov_llog_finish,
2861 o_notify: lov_notify,
2864 int __init lov_init(void)
2866 struct lprocfs_static_vars lvars;
2869 lprocfs_init_vars(lov, &lvars);
2870 rc = class_register_type(&lov_obd_ops, lvars.module_vars,
2871 OBD_LOV_DEVICENAME);
2876 static void /*__exit*/ lov_exit(void)
2878 class_unregister_type(OBD_LOV_DEVICENAME);
2881 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2882 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2883 MODULE_LICENSE("GPL");
2885 module_init(lov_init);
2886 module_exit(lov_exit);