4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * Implementation of cl_object for LOV layer.
34 * Author: Nikita Danilov <nikita.danilov@sun.com>
35 * Author: Jinshan Xiong <jinshan.xiong@whamcloud.com>
38 #define DEBUG_SUBSYSTEM S_LOV
40 #include <linux/random.h>
42 #include "lov_cl_internal.h"
44 static inline struct lov_device *lov_object_dev(struct lov_object *obj)
46 return lu2lov_dev(obj->lo_cl.co_lu.lo_dev);
53 /*****************************************************************************
59 struct lov_layout_operations {
60 int (*llo_init)(const struct lu_env *env, struct lov_device *dev,
61 struct lov_object *lov, struct lov_stripe_md *lsm,
62 const struct cl_object_conf *conf,
63 union lov_layout_state *state);
64 int (*llo_delete)(const struct lu_env *env, struct lov_object *lov,
65 union lov_layout_state *state);
66 void (*llo_fini)(const struct lu_env *env, struct lov_object *lov,
67 union lov_layout_state *state);
68 int (*llo_print)(const struct lu_env *env, void *cookie,
69 lu_printer_t p, const struct lu_object *o);
70 int (*llo_page_init)(const struct lu_env *env, struct cl_object *obj,
71 struct cl_page *page, pgoff_t index);
72 int (*llo_lock_init)(const struct lu_env *env,
73 struct cl_object *obj, struct cl_lock *lock,
74 const struct cl_io *io);
75 int (*llo_io_init)(const struct lu_env *env,
76 struct cl_object *obj, struct cl_io *io);
77 int (*llo_getattr)(const struct lu_env *env, struct cl_object *obj,
78 struct cl_attr *attr);
79 int (*llo_flush)(const struct lu_env *env, struct cl_object *obj,
80 struct ldlm_lock *lock);
83 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov);
84 static struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov);
86 static void lov_lsm_put(struct lov_stripe_md *lsm)
92 /*****************************************************************************
94 * Lov object layout operations.
98 static struct cl_object *lov_sub_find(const struct lu_env *env,
99 struct cl_device *dev,
100 const struct lu_fid *fid,
101 const struct cl_object_conf *conf)
107 o = lu_object_find_at(env, cl2lu_dev(dev), fid, &conf->coc_lu);
108 LASSERT(ergo(!IS_ERR(o), o->lo_dev->ld_type == &lovsub_device_type));
112 static int lov_page_slice_fixup(struct lov_object *lov,
113 struct cl_object *stripe)
115 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
119 return hdr->coh_page_bufsize - lov->lo_cl.co_slice_off -
120 cfs_size_round(sizeof(struct lov_page));
122 cl_object_for_each(o, stripe)
123 o->co_slice_off += hdr->coh_page_bufsize;
125 return cl_object_header(stripe)->coh_page_bufsize;
128 static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
129 struct cl_object *subobj, struct lov_oinfo *oinfo,
132 struct cl_object_header *hdr;
133 struct cl_object_header *subhdr;
134 struct cl_object_header *parent;
135 int entry = lov_comp_entry(idx);
136 int stripe = lov_comp_stripe(idx);
139 if (OBD_FAIL_CHECK(OBD_FAIL_LOV_INIT)) {
140 /* For sanity:test_206.
141 * Do not leave the object in cache to avoid accessing
142 * freed memory. This is because osc_object is referring to
143 * lov_oinfo of lsm_stripe_data which will be freed due to
145 cl_object_kill(env, subobj);
146 cl_object_put(env, subobj);
150 hdr = cl_object_header(lov2cl(lov));
151 subhdr = cl_object_header(subobj);
153 CDEBUG(D_INODE, DFID"@%p[%d:%d] -> "DFID"@%p: ostid: "DOSTID
154 " ost idx: %d gen: %d\n",
155 PFID(lu_object_fid(&subobj->co_lu)), subhdr, entry, stripe,
156 PFID(lu_object_fid(lov2lu(lov))), hdr, POSTID(&oinfo->loi_oi),
157 oinfo->loi_ost_idx, oinfo->loi_ost_gen);
159 /* reuse ->coh_attr_guard to protect coh_parent change */
160 spin_lock(&subhdr->coh_attr_guard);
161 parent = subhdr->coh_parent;
162 if (parent == NULL) {
163 struct lovsub_object *lso = cl2lovsub(subobj);
165 subhdr->coh_parent = hdr;
166 spin_unlock(&subhdr->coh_attr_guard);
167 subhdr->coh_nesting = hdr->coh_nesting + 1;
168 lu_object_ref_add(&subobj->co_lu, "lov-parent", lov);
169 lso->lso_super = lov;
170 lso->lso_index = idx;
173 struct lu_object *old_obj;
174 struct lov_object *old_lov;
175 unsigned int mask = D_INODE;
177 spin_unlock(&subhdr->coh_attr_guard);
178 old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
179 LASSERT(old_obj != NULL);
180 old_lov = cl2lov(lu2cl(old_obj));
181 if (old_lov->lo_layout_invalid) {
182 /* the object's layout has already changed but isn't
184 lu_object_unhash(env, &subobj->co_lu);
191 LU_OBJECT_DEBUG(mask, env, &subobj->co_lu,
192 "stripe %d is already owned.", idx);
193 LU_OBJECT_DEBUG(mask, env, old_obj, "owned.");
194 LU_OBJECT_HEADER(mask, env, lov2lu(lov), "try to own.\n");
195 cl_object_put(env, subobj);
200 static int lov_init_raid0(const struct lu_env *env, struct lov_device *dev,
201 struct lov_object *lov, unsigned int index,
202 const struct cl_object_conf *conf,
203 struct lov_layout_entry *lle)
205 struct lov_layout_raid0 *r0 = &lle->lle_raid0;
206 struct lov_thread_info *lti = lov_env_info(env);
207 struct cl_object_conf *subconf = <i->lti_stripe_conf;
208 struct lu_fid *ofid = <i->lti_fid;
209 struct cl_object *stripe;
210 struct lov_stripe_md_entry *lse = lov_lse(lov, index);
217 spin_lock_init(&r0->lo_sub_lock);
218 r0->lo_nr = lse->lsme_stripe_count;
219 r0->lo_trunc_stripeno = -1;
221 OBD_ALLOC_PTR_ARRAY_LARGE(r0->lo_sub, r0->lo_nr);
222 if (r0->lo_sub == NULL)
223 GOTO(out, result = -ENOMEM);
227 memset(subconf, 0, sizeof(*subconf));
230 * Create stripe cl_objects.
232 for (i = 0; i < r0->lo_nr; ++i) {
233 struct cl_device *subdev;
234 struct lov_oinfo *oinfo = lse->lsme_oinfo[i];
235 int ost_idx = oinfo->loi_ost_idx;
237 if (lov_oinfo_is_dummy(oinfo))
240 result = ostid_to_fid(ofid, &oinfo->loi_oi, oinfo->loi_ost_idx);
244 if (dev->ld_target[ost_idx] == NULL) {
245 CERROR("%s: OST %04x is not initialized\n",
246 lov2obd(dev->ld_lov)->obd_name, ost_idx);
247 GOTO(out, result = -EIO);
250 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
251 subconf->u.coc_oinfo = oinfo;
252 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
253 /* In the function below, .hs_keycmp resolves to
254 * lu_obj_hop_keycmp() */
255 /* coverity[overrun-buffer-val] */
256 stripe = lov_sub_find(env, subdev, ofid, subconf);
258 GOTO(out, result = PTR_ERR(stripe));
260 result = lov_init_sub(env, lov, stripe, oinfo,
261 lov_comp_index(index, i));
262 if (result == -EAGAIN) { /* try again */
269 r0->lo_sub[i] = cl2lovsub(stripe);
271 sz = lov_page_slice_fixup(lov, stripe);
272 LASSERT(ergo(psz > 0, psz == sz));
282 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
283 struct lov_layout_raid0 *r0,
284 struct lovsub_object *los, int idx)
286 struct cl_object *sub;
287 struct lu_site *site;
288 wait_queue_head_t *wq;
290 LASSERT(r0->lo_sub[idx] == los);
292 sub = lovsub2cl(los);
293 site = sub->co_lu.lo_dev->ld_site;
294 wq = lu_site_wq_from_fid(site, &sub->co_lu.lo_header->loh_fid);
296 cl_object_kill(env, sub);
297 /* release a reference to the sub-object and ... */
298 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
299 cl_object_put(env, sub);
301 /* ... wait until it is actually destroyed---sub-object clears its
302 * ->lo_sub[] slot in lovsub_object_free() */
303 wait_event(*wq, r0->lo_sub[idx] != los);
304 LASSERT(r0->lo_sub[idx] == NULL);
307 static void lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
308 struct lov_layout_entry *lle)
310 struct lov_layout_raid0 *r0 = &lle->lle_raid0;
314 if (r0->lo_sub != NULL) {
317 for (i = 0; i < r0->lo_nr; ++i) {
318 struct lovsub_object *los = r0->lo_sub[i];
321 cl_object_prune(env, &los->lso_cl);
323 * If top-level object is to be evicted from
324 * the cache, so are its sub-objects.
326 lov_subobject_kill(env, lov, r0, los, i);
334 static void lov_fini_raid0(const struct lu_env *env,
335 struct lov_layout_entry *lle)
337 struct lov_layout_raid0 *r0 = &lle->lle_raid0;
339 if (r0->lo_sub != NULL) {
340 OBD_FREE_PTR_ARRAY_LARGE(r0->lo_sub, r0->lo_nr);
345 static int lov_print_raid0(const struct lu_env *env, void *cookie,
346 lu_printer_t p, const struct lov_layout_entry *lle)
348 const struct lov_layout_raid0 *r0 = &lle->lle_raid0;
351 for (i = 0; i < r0->lo_nr; ++i) {
352 struct lu_object *sub;
354 if (r0->lo_sub[i] != NULL) {
355 sub = lovsub2lu(r0->lo_sub[i]);
356 lu_object_print(env, cookie, p, sub);
358 (*p)(env, cookie, "sub %d absent\n", i);
364 static int lov_attr_get_raid0(const struct lu_env *env, struct lov_object *lov,
365 unsigned int index, struct lov_layout_entry *lle,
366 struct cl_attr **lov_attr)
368 struct lov_layout_raid0 *r0 = &lle->lle_raid0;
369 struct lov_stripe_md *lsm = lov->lo_lsm;
370 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
371 struct cl_attr *attr = &r0->lo_attr;
375 if (r0->lo_attr_valid) {
380 memset(lvb, 0, sizeof(*lvb));
382 /* XXX: timestamps can be negative by sanity:test_39m,
384 lvb->lvb_atime = LLONG_MIN;
385 lvb->lvb_ctime = LLONG_MIN;
386 lvb->lvb_mtime = LLONG_MIN;
389 * XXX that should be replaced with a loop over sub-objects,
390 * doing cl_object_attr_get() on them. But for now, let's
391 * reuse old lov code.
395 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
396 * happy. It's not needed, because new code uses
397 * ->coh_attr_guard spin-lock to protect consistency of
398 * sub-object attributes.
400 lov_stripe_lock(lsm);
401 result = lov_merge_lvb_kms(lsm, index, lvb, &kms);
402 lov_stripe_unlock(lsm);
404 cl_lvb2attr(attr, lvb);
406 r0->lo_attr_valid = 1;
413 static struct lov_comp_layout_entry_ops raid0_ops = {
414 .lco_init = lov_init_raid0,
415 .lco_fini = lov_fini_raid0,
416 .lco_getattr = lov_attr_get_raid0,
419 static int lov_attr_get_dom(const struct lu_env *env, struct lov_object *lov,
420 unsigned int index, struct lov_layout_entry *lle,
421 struct cl_attr **lov_attr)
423 struct lov_layout_dom *dom = &lle->lle_dom;
424 struct lov_oinfo *loi = dom->lo_loi;
425 struct cl_attr *attr = &dom->lo_dom_r0.lo_attr;
427 if (dom->lo_dom_r0.lo_attr_valid) {
432 if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks))
433 return OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
435 cl_lvb2attr(attr, &loi->loi_lvb);
437 /* DoM component size can be bigger than stripe size after
438 * client's setattr RPC, so do not count anything beyond
439 * component end. Alternatively, check that limit on server
440 * and do not allow size overflow there. */
441 if (attr->cat_size > lle->lle_extent->e_end)
442 attr->cat_size = lle->lle_extent->e_end;
444 attr->cat_kms = attr->cat_size;
446 dom->lo_dom_r0.lo_attr_valid = 1;
453 * Lookup FLD to get MDS index of the given DOM object FID.
455 * \param[in] ld LOV device
456 * \param[in] fid FID to lookup
457 * \param[out] nr index in MDC array to return back
459 * \retval 0 and \a mds filled with MDS index if successful
460 * \retval negative value on error
462 static int lov_fld_lookup(struct lov_device *ld, const struct lu_fid *fid,
470 rc = fld_client_lookup(&ld->ld_lmv->u.lmv.lmv_fld, fid_seq(fid),
471 &mds_idx, LU_SEQ_RANGE_MDT, NULL);
473 CERROR("%s: error while looking for mds number. Seq %#llx"
474 ", err = %d\n", lu_dev_name(cl2lu_dev(&ld->ld_cl)),
479 CDEBUG(D_INODE, "FLD lookup got mds #%x for fid="DFID"\n",
482 /* find proper MDC device in the array */
483 for (i = 0; i < ld->ld_md_tgts_nr; i++) {
484 if (ld->ld_md_tgts[i].ldm_mdc != NULL &&
485 ld->ld_md_tgts[i].ldm_idx == mds_idx)
489 if (i == ld->ld_md_tgts_nr) {
490 CERROR("%s: cannot find corresponding MDC device for mds #%x "
491 "for fid="DFID"\n", lu_dev_name(cl2lu_dev(&ld->ld_cl)),
501 * Implementation of lov_comp_layout_entry_ops::lco_init for DOM object.
503 * Init the DOM object for the first time. It prepares also RAID0 entry
504 * for it to use in common methods with ordinary RAID0 layout entries.
506 * \param[in] env execution environment
507 * \param[in] dev LOV device
508 * \param[in] lov LOV object
509 * \param[in] index Composite layout entry index in LSM
510 * \param[in] lle Composite LOV layout entry
512 static int lov_init_dom(const struct lu_env *env, struct lov_device *dev,
513 struct lov_object *lov, unsigned int index,
514 const struct cl_object_conf *conf,
515 struct lov_layout_entry *lle)
517 struct lov_thread_info *lti = lov_env_info(env);
518 struct lov_stripe_md_entry *lsme = lov_lse(lov, index);
519 struct cl_object *clo;
520 struct lu_object *o = lov2lu(lov);
521 const struct lu_fid *fid = lu_object_fid(o);
522 struct cl_device *mdcdev;
523 struct lov_oinfo *loi = NULL;
524 struct cl_object_conf *sconf = <i->lti_stripe_conf;
530 /* DOM entry may be not zero index due to FLR but must start from 0 */
531 if (unlikely(lle->lle_extent->e_start != 0)) {
532 CERROR("%s: DOM entry must be the first stripe in a mirror\n",
533 lov2obd(dev->ld_lov)->obd_name);
534 dump_lsm(D_ERROR, lov->lo_lsm);
538 /* find proper MDS device */
539 rc = lov_fld_lookup(dev, fid, &idx);
543 LASSERTF(dev->ld_md_tgts[idx].ldm_mdc != NULL,
544 "LOV md target[%u] is NULL\n", idx);
546 /* check lsm is DOM, more checks are needed */
547 LASSERT(lsme->lsme_stripe_count == 0);
550 * Create lower cl_objects.
552 mdcdev = dev->ld_md_tgts[idx].ldm_mdc;
554 LASSERTF(mdcdev != NULL, "non-initialized mdc subdev\n");
556 /* DoM object has no oinfo in LSM entry, create it exclusively */
557 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS);
561 fid_to_ostid(lu_object_fid(lov2lu(lov)), &loi->loi_oi);
563 sconf->u.coc_oinfo = loi;
565 clo = lov_sub_find(env, mdcdev, fid, sconf);
567 GOTO(out, rc = PTR_ERR(clo));
569 rc = lov_init_sub(env, lov, clo, loi, lov_comp_index(index, 0));
570 if (rc == -EAGAIN) /* try again */
575 lle->lle_dom.lo_dom = cl2lovsub(clo);
576 spin_lock_init(&lle->lle_dom.lo_dom_r0.lo_sub_lock);
577 lle->lle_dom.lo_dom_r0.lo_nr = 1;
578 lle->lle_dom.lo_dom_r0.lo_sub = &lle->lle_dom.lo_dom;
579 lle->lle_dom.lo_loi = loi;
581 rc = lov_page_slice_fixup(lov, clo);
586 OBD_SLAB_FREE_PTR(loi, lov_oinfo_slab);
591 * Implementation of lov_layout_operations::llo_fini for DOM object.
593 * Finish the DOM object and free related memory.
595 * \param[in] env execution environment
596 * \param[in] lov LOV object
597 * \param[in] state LOV layout state
599 static void lov_fini_dom(const struct lu_env *env,
600 struct lov_layout_entry *lle)
602 if (lle->lle_dom.lo_dom != NULL)
603 lle->lle_dom.lo_dom = NULL;
604 if (lle->lle_dom.lo_loi != NULL)
605 OBD_SLAB_FREE_PTR(lle->lle_dom.lo_loi, lov_oinfo_slab);
608 static struct lov_comp_layout_entry_ops dom_ops = {
609 .lco_init = lov_init_dom,
610 .lco_fini = lov_fini_dom,
611 .lco_getattr = lov_attr_get_dom,
614 static int lov_init_composite(const struct lu_env *env, struct lov_device *dev,
615 struct lov_object *lov, struct lov_stripe_md *lsm,
616 const struct cl_object_conf *conf,
617 union lov_layout_state *state)
619 struct lov_layout_composite *comp = &state->composite;
620 struct lov_layout_entry *lle;
621 struct lov_mirror_entry *lre;
622 unsigned int entry_count;
623 unsigned int psz = 0;
624 unsigned int mirror_count;
625 int flr_state = lsm->lsm_flags & LCM_FL_FLR_MASK;
633 LASSERT(lsm->lsm_entry_count > 0);
634 LASSERT(lov->lo_lsm == NULL);
635 lov->lo_lsm = lsm_addref(lsm);
636 lov->lo_layout_invalid = true;
638 dump_lsm(D_INODE, lsm);
640 entry_count = lsm->lsm_entry_count;
642 spin_lock_init(&comp->lo_write_lock);
643 comp->lo_flags = lsm->lsm_flags;
644 comp->lo_mirror_count = lsm->lsm_mirror_count + 1;
645 comp->lo_entry_count = lsm->lsm_entry_count;
646 comp->lo_preferred_mirror = -1;
648 if (equi(flr_state == LCM_FL_NONE, comp->lo_mirror_count > 1))
651 OBD_ALLOC_PTR_ARRAY(comp->lo_mirrors, comp->lo_mirror_count);
652 if (comp->lo_mirrors == NULL)
655 OBD_ALLOC_PTR_ARRAY(comp->lo_entries, entry_count);
656 if (comp->lo_entries == NULL)
659 /* Initiate all entry types and extents data at first */
660 for (i = 0, j = 0, mirror_count = 1; i < entry_count; i++) {
663 lle = &comp->lo_entries[i];
665 lle->lle_lsme = lsm->lsm_entries[i];
666 lle->lle_type = lov_entry_type(lle->lle_lsme);
667 switch (lle->lle_type) {
668 case LOV_PATTERN_RAID0:
669 lle->lle_comp_ops = &raid0_ops;
671 case LOV_PATTERN_MDT:
672 /* Allowed to have several DOM stripes in different
673 * mirrors with the same DoM size.
676 dom_size = lle->lle_lsme->lsme_extent.e_end;
677 } else if (dom_size !=
678 lle->lle_lsme->lsme_extent.e_end) {
679 CERROR("%s: DOM entries with different sizes\n",
680 lov2obd(dev->ld_lov)->obd_name);
681 dump_lsm(D_ERROR, lsm);
684 lle->lle_comp_ops = &dom_ops;
687 CERROR("%s: unknown composite layout entry type %i\n",
688 lov2obd(dev->ld_lov)->obd_name,
689 lsm->lsm_entries[i]->lsme_pattern);
690 dump_lsm(D_ERROR, lsm);
694 lle->lle_extent = &lle->lle_lsme->lsme_extent;
695 lle->lle_valid = !(lle->lle_lsme->lsme_flags & LCME_FL_STALE);
697 if (flr_state != LCM_FL_NONE)
698 mirror_id = mirror_id_of(lle->lle_lsme->lsme_id);
700 lre = &comp->lo_mirrors[j];
702 if (mirror_id == lre->lre_mirror_id) {
703 lre->lre_valid |= lle->lle_valid;
704 lre->lre_stale |= !lle->lle_valid;
709 /* new mirror detected, assume that the mirrors
710 * are shorted in layout */
713 if (j >= comp->lo_mirror_count)
716 lre = &comp->lo_mirrors[j];
719 /* entries must be sorted by mirrors */
720 lre->lre_mirror_id = mirror_id;
721 lre->lre_start = lre->lre_end = i;
722 lre->lre_preferred = !!(lle->lle_lsme->lsme_flags &
724 lre->lre_valid = lle->lle_valid;
725 lre->lre_stale = !lle->lle_valid;
728 /* sanity check for FLR */
729 if (mirror_count != comp->lo_mirror_count) {
731 " doesn't have the # of mirrors it claims, %u/%u\n",
732 PFID(lu_object_fid(lov2lu(lov))), mirror_count,
733 comp->lo_mirror_count + 1);
735 GOTO(out, result = -EINVAL);
738 lov_foreach_layout_entry(lov, lle) {
739 int index = lov_layout_entry_index(lov, lle);
742 * If the component has not been init-ed on MDS side, for
743 * PFL layout, we'd know that the components beyond this one
744 * will be dynamically init-ed later on file write/trunc ops.
746 if (!lsme_inited(lle->lle_lsme))
749 result = lle->lle_comp_ops->lco_init(env, dev, lov, index,
754 LASSERT(ergo(psz > 0, psz == result));
759 cl_object_header(&lov->lo_cl)->coh_page_bufsize += psz;
761 /* decide the preferred mirror. It uses the hash value of lov_object
762 * so that different clients would use different mirrors for read. */
764 seq = hash_long((unsigned long)lov, 8);
765 for (i = 0; i < comp->lo_mirror_count; i++) {
766 unsigned int idx = (i + seq) % comp->lo_mirror_count;
768 lre = lov_mirror_entry(lov, idx);
772 mirror_count++; /* valid mirror */
774 if (lre->lre_preferred || comp->lo_preferred_mirror < 0)
775 comp->lo_preferred_mirror = idx;
779 " doesn't have any valid mirrors\n",
780 PFID(lu_object_fid(lov2lu(lov))));
782 comp->lo_preferred_mirror = 0;
785 LASSERT(comp->lo_preferred_mirror >= 0);
789 return result > 0 ? 0 : result;
792 static int lov_init_empty(const struct lu_env *env, struct lov_device *dev,
793 struct lov_object *lov, struct lov_stripe_md *lsm,
794 const struct cl_object_conf *conf,
795 union lov_layout_state *state)
800 static int lov_init_released(const struct lu_env *env,
801 struct lov_device *dev, struct lov_object *lov,
802 struct lov_stripe_md *lsm,
803 const struct cl_object_conf *conf,
804 union lov_layout_state *state)
806 LASSERT(lsm != NULL);
807 LASSERT(lsm->lsm_is_released);
808 LASSERT(lov->lo_lsm == NULL);
810 lov->lo_lsm = lsm_addref(lsm);
814 static int lov_init_foreign(const struct lu_env *env,
815 struct lov_device *dev, struct lov_object *lov,
816 struct lov_stripe_md *lsm,
817 const struct cl_object_conf *conf,
818 union lov_layout_state *state)
820 LASSERT(lsm != NULL);
821 LASSERT(lov->lo_type == LLT_FOREIGN);
822 LASSERT(lov->lo_lsm == NULL);
824 lov->lo_lsm = lsm_addref(lsm);
828 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
829 union lov_layout_state *state)
831 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED ||
832 lov->lo_type == LLT_FOREIGN);
834 lov_layout_wait(env, lov);
838 static int lov_delete_composite(const struct lu_env *env,
839 struct lov_object *lov,
840 union lov_layout_state *state)
842 struct lov_layout_entry *entry;
843 struct lov_layout_composite *comp = &state->composite;
847 dump_lsm(D_INODE, lov->lo_lsm);
849 lov_layout_wait(env, lov);
850 if (comp->lo_entries)
851 lov_foreach_layout_entry(lov, entry)
852 lov_delete_raid0(env, lov, entry);
857 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
858 union lov_layout_state *state)
860 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
863 static void lov_fini_composite(const struct lu_env *env,
864 struct lov_object *lov,
865 union lov_layout_state *state)
867 struct lov_layout_composite *comp = &state->composite;
870 if (comp->lo_entries != NULL) {
871 struct lov_layout_entry *entry;
873 lov_foreach_layout_entry(lov, entry)
874 if (entry->lle_comp_ops)
875 entry->lle_comp_ops->lco_fini(env, entry);
877 OBD_FREE_PTR_ARRAY(comp->lo_entries, comp->lo_entry_count);
878 comp->lo_entries = NULL;
881 if (comp->lo_mirrors != NULL) {
882 OBD_FREE_PTR_ARRAY(comp->lo_mirrors, comp->lo_mirror_count);
883 comp->lo_mirrors = NULL;
886 memset(comp, 0, sizeof(*comp));
888 dump_lsm(D_INODE, lov->lo_lsm);
889 lov_free_memmd(&lov->lo_lsm);
894 static void lov_fini_released(const struct lu_env *env, struct lov_object *lov,
895 union lov_layout_state *state)
898 dump_lsm(D_INODE, lov->lo_lsm);
899 lov_free_memmd(&lov->lo_lsm);
903 static int lov_print_empty(const struct lu_env *env, void *cookie,
904 lu_printer_t p, const struct lu_object *o)
906 (*p)(env, cookie, "empty %d\n", lu2lov(o)->lo_layout_invalid);
910 static int lov_print_composite(const struct lu_env *env, void *cookie,
911 lu_printer_t p, const struct lu_object *o)
913 struct lov_object *lov = lu2lov(o);
914 struct lov_stripe_md *lsm = lov->lo_lsm;
917 (*p)(env, cookie, "entries: %d, %s, lsm{%p 0x%08X %d %u}:\n",
918 lsm->lsm_entry_count,
919 lov->lo_layout_invalid ? "invalid" : "valid", lsm,
920 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
921 lsm->lsm_layout_gen);
923 for (i = 0; i < lsm->lsm_entry_count; i++) {
924 struct lov_stripe_md_entry *lse = lsm->lsm_entries[i];
925 struct lov_layout_entry *lle = lov_entry(lov, i);
928 DEXT ": { 0x%08X, %u, %#x, %u, %#x, %u, %u }\n",
929 PEXT(&lse->lsme_extent), lse->lsme_magic,
930 lse->lsme_id, lse->lsme_pattern, lse->lsme_layout_gen,
931 lse->lsme_flags, lse->lsme_stripe_count,
932 lse->lsme_stripe_size);
933 lov_print_raid0(env, cookie, p, lle);
939 static int lov_print_released(const struct lu_env *env, void *cookie,
940 lu_printer_t p, const struct lu_object *o)
942 struct lov_object *lov = lu2lov(o);
943 struct lov_stripe_md *lsm = lov->lo_lsm;
946 "released: %s, lsm{%p 0x%08X %d %u}:\n",
947 lov->lo_layout_invalid ? "invalid" : "valid", lsm,
948 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
949 lsm->lsm_layout_gen);
953 static int lov_print_foreign(const struct lu_env *env, void *cookie,
954 lu_printer_t p, const struct lu_object *o)
956 struct lov_object *lov = lu2lov(o);
957 struct lov_stripe_md *lsm = lov->lo_lsm;
960 "foreign: %s, lsm{%p 0x%08X %d %u}:\n",
961 lov->lo_layout_invalid ? "invalid" : "valid", lsm,
962 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
963 lsm->lsm_layout_gen);
965 "raw_ea_content '%.*s'\n",
966 (int)lsm->lsm_foreign_size, (char *)lsm_foreign(lsm));
971 * Implements cl_object_operations::coo_attr_get() method for an object
972 * without stripes (LLT_EMPTY layout type).
974 * The only attributes this layer is authoritative in this case is
975 * cl_attr::cat_blocks---it's 0.
977 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
978 struct cl_attr *attr)
980 attr->cat_blocks = 0;
984 static int lov_attr_get_composite(const struct lu_env *env,
985 struct cl_object *obj,
986 struct cl_attr *attr)
988 struct lov_object *lov = cl2lov(obj);
989 struct lov_layout_entry *entry;
995 attr->cat_blocks = 0;
996 lov_foreach_layout_entry(lov, entry) {
997 struct cl_attr *lov_attr = NULL;
998 int index = lov_layout_entry_index(lov, entry);
1000 if (!entry->lle_valid)
1003 /* PFL: This component has not been init-ed. */
1004 if (!lsm_entry_inited(lov->lo_lsm, index))
1007 result = entry->lle_comp_ops->lco_getattr(env, lov, index,
1012 if (lov_attr == NULL)
1015 CDEBUG(D_INODE, "COMP ID #%i: s=%llu m=%llu a=%llu c=%llu "
1016 "b=%llu\n", index - 1, lov_attr->cat_size,
1017 lov_attr->cat_mtime, lov_attr->cat_atime,
1018 lov_attr->cat_ctime, lov_attr->cat_blocks);
1021 attr->cat_blocks += lov_attr->cat_blocks;
1022 if (attr->cat_size < lov_attr->cat_size)
1023 attr->cat_size = lov_attr->cat_size;
1024 if (attr->cat_kms < lov_attr->cat_kms)
1025 attr->cat_kms = lov_attr->cat_kms;
1026 if (attr->cat_atime < lov_attr->cat_atime)
1027 attr->cat_atime = lov_attr->cat_atime;
1028 if (attr->cat_ctime < lov_attr->cat_ctime)
1029 attr->cat_ctime = lov_attr->cat_ctime;
1030 if (attr->cat_mtime < lov_attr->cat_mtime)
1031 attr->cat_mtime = lov_attr->cat_mtime;
1037 static int lov_flush_composite(const struct lu_env *env,
1038 struct cl_object *obj,
1039 struct ldlm_lock *lock)
1041 struct lov_object *lov = cl2lov(obj);
1042 struct lov_layout_entry *lle;
1047 lov_foreach_layout_entry(lov, lle) {
1048 if (!lsme_is_dom(lle->lle_lsme))
1050 rc = cl_object_flush(env, lovsub2cl(lle->lle_dom.lo_dom), lock);
1057 static int lov_flush_empty(const struct lu_env *env, struct cl_object *obj,
1058 struct ldlm_lock *lock)
1063 const static struct lov_layout_operations lov_dispatch[] = {
1065 .llo_init = lov_init_empty,
1066 .llo_delete = lov_delete_empty,
1067 .llo_fini = lov_fini_empty,
1068 .llo_print = lov_print_empty,
1069 .llo_page_init = lov_page_init_empty,
1070 .llo_lock_init = lov_lock_init_empty,
1071 .llo_io_init = lov_io_init_empty,
1072 .llo_getattr = lov_attr_get_empty,
1073 .llo_flush = lov_flush_empty,
1076 .llo_init = lov_init_released,
1077 .llo_delete = lov_delete_empty,
1078 .llo_fini = lov_fini_released,
1079 .llo_print = lov_print_released,
1080 .llo_page_init = lov_page_init_empty,
1081 .llo_lock_init = lov_lock_init_empty,
1082 .llo_io_init = lov_io_init_released,
1083 .llo_getattr = lov_attr_get_empty,
1084 .llo_flush = lov_flush_empty,
1087 .llo_init = lov_init_composite,
1088 .llo_delete = lov_delete_composite,
1089 .llo_fini = lov_fini_composite,
1090 .llo_print = lov_print_composite,
1091 .llo_page_init = lov_page_init_composite,
1092 .llo_lock_init = lov_lock_init_composite,
1093 .llo_io_init = lov_io_init_composite,
1094 .llo_getattr = lov_attr_get_composite,
1095 .llo_flush = lov_flush_composite,
1098 .llo_init = lov_init_foreign,
1099 .llo_delete = lov_delete_empty,
1100 .llo_fini = lov_fini_released,
1101 .llo_print = lov_print_foreign,
1102 .llo_page_init = lov_page_init_foreign,
1103 .llo_lock_init = lov_lock_init_empty,
1104 .llo_io_init = lov_io_init_empty,
1105 .llo_getattr = lov_attr_get_empty,
1106 .llo_flush = lov_flush_empty,
1111 * Performs a double-dispatch based on the layout type of an object.
1113 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
1115 struct lov_object *__obj = (obj); \
1116 enum lov_layout_type __llt; \
1118 __llt = __obj->lo_type; \
1119 LASSERT(__llt < ARRAY_SIZE(lov_dispatch)); \
1120 lov_dispatch[__llt].op(__VA_ARGS__); \
1124 * Return lov_layout_type associated with a given lsm
1126 static enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
1131 if (lsm->lsm_is_released)
1132 return LLT_RELEASED;
1134 if (lsm->lsm_magic == LOV_MAGIC_V1 ||
1135 lsm->lsm_magic == LOV_MAGIC_V3 ||
1136 lsm->lsm_magic == LOV_MAGIC_COMP_V1)
1139 if (lsm->lsm_magic == LOV_MAGIC_FOREIGN)
1145 static inline void lov_conf_freeze(struct lov_object *lov)
1147 CDEBUG(D_INODE, "To take share lov(%p) owner %p/%p\n",
1148 lov, lov->lo_owner, current);
1149 if (lov->lo_owner != current)
1150 down_read(&lov->lo_type_guard);
1153 static inline void lov_conf_thaw(struct lov_object *lov)
1155 CDEBUG(D_INODE, "To release share lov(%p) owner %p/%p\n",
1156 lov, lov->lo_owner, current);
1157 if (lov->lo_owner != current)
1158 up_read(&lov->lo_type_guard);
1161 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
1163 struct lov_object *__obj = (obj); \
1164 int __lock = !!(lock); \
1165 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
1168 lov_conf_freeze(__obj); \
1169 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
1171 lov_conf_thaw(__obj); \
1176 * Performs a locked double-dispatch based on the layout type of an object.
1178 #define LOV_2DISPATCH(obj, op, ...) \
1179 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
1181 #define LOV_2DISPATCH_VOID(obj, op, ...) \
1183 struct lov_object *__obj = (obj); \
1184 enum lov_layout_type __llt; \
1186 lov_conf_freeze(__obj); \
1187 __llt = __obj->lo_type; \
1188 LASSERT(__llt < ARRAY_SIZE(lov_dispatch)); \
1189 lov_dispatch[__llt].op(__VA_ARGS__); \
1190 lov_conf_thaw(__obj); \
1193 static void lov_conf_lock(struct lov_object *lov)
1195 LASSERT(lov->lo_owner != current);
1196 down_write(&lov->lo_type_guard);
1197 LASSERT(lov->lo_owner == NULL);
1198 lov->lo_owner = current;
1199 CDEBUG(D_INODE, "Took exclusive lov(%p) owner %p\n",
1200 lov, lov->lo_owner);
1203 static void lov_conf_unlock(struct lov_object *lov)
1205 CDEBUG(D_INODE, "To release exclusive lov(%p) owner %p\n",
1206 lov, lov->lo_owner);
1207 lov->lo_owner = NULL;
1208 up_write(&lov->lo_type_guard);
1211 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
1215 while (atomic_read(&lov->lo_active_ios) > 0) {
1216 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
1217 PFID(lu_object_fid(lov2lu(lov))),
1218 atomic_read(&lov->lo_active_ios));
1220 wait_event_idle(lov->lo_waitq,
1221 atomic_read(&lov->lo_active_ios) == 0);
1226 static int lov_layout_change(const struct lu_env *unused,
1227 struct lov_object *lov, struct lov_stripe_md *lsm,
1228 const struct cl_object_conf *conf)
1230 enum lov_layout_type llt = lov_type(lsm);
1231 union lov_layout_state *state = &lov->u;
1232 const struct lov_layout_operations *old_ops;
1233 const struct lov_layout_operations *new_ops;
1234 struct lov_device *lov_dev = lov_object_dev(lov);
1240 LASSERT(lov->lo_type < ARRAY_SIZE(lov_dispatch));
1242 env = cl_env_get(&refcheck);
1244 RETURN(PTR_ERR(env));
1246 LASSERT(llt < ARRAY_SIZE(lov_dispatch));
1248 CDEBUG(D_INODE, DFID" from %s to %s\n",
1249 PFID(lu_object_fid(lov2lu(lov))),
1250 llt2str(lov->lo_type), llt2str(llt));
1252 old_ops = &lov_dispatch[lov->lo_type];
1253 new_ops = &lov_dispatch[llt];
1255 rc = cl_object_prune(env, &lov->lo_cl);
1259 rc = old_ops->llo_delete(env, lov, &lov->u);
1263 old_ops->llo_fini(env, lov, &lov->u);
1265 LASSERT(atomic_read(&lov->lo_active_ios) == 0);
1267 CDEBUG(D_INODE, DFID "Apply new layout lov %p, type %d\n",
1268 PFID(lu_object_fid(lov2lu(lov))), lov, llt);
1270 /* page bufsize fixup */
1271 cl_object_header(&lov->lo_cl)->coh_page_bufsize -=
1272 lov_page_slice_fixup(lov, NULL);
1275 rc = new_ops->llo_init(env, lov_dev, lov, lsm, conf, state);
1277 struct obd_device *obd = lov2obd(lov_dev->ld_lov);
1279 CERROR("%s: cannot apply new layout on "DFID" : rc = %d\n",
1280 obd->obd_name, PFID(lu_object_fid(lov2lu(lov))), rc);
1281 new_ops->llo_delete(env, lov, state);
1282 new_ops->llo_fini(env, lov, state);
1283 /* this file becomes an EMPTY file. */
1284 lov->lo_type = LLT_EMPTY;
1289 cl_env_put(env, &refcheck);
1293 /*****************************************************************************
1295 * Lov object operations.
1298 static int lov_object_init(const struct lu_env *env, struct lu_object *obj,
1299 const struct lu_object_conf *conf)
1301 struct lov_object *lov = lu2lov(obj);
1302 struct lov_device *dev = lov_object_dev(lov);
1303 const struct cl_object_conf *cconf = lu2cl_conf(conf);
1304 union lov_layout_state *set = &lov->u;
1305 const struct lov_layout_operations *ops;
1306 struct lov_stripe_md *lsm = NULL;
1310 init_rwsem(&lov->lo_type_guard);
1311 atomic_set(&lov->lo_active_ios, 0);
1312 init_waitqueue_head(&lov->lo_waitq);
1313 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
1315 lov->lo_type = LLT_EMPTY;
1316 if (cconf->u.coc_layout.lb_buf != NULL) {
1317 lsm = lov_unpackmd(dev->ld_lov,
1318 cconf->u.coc_layout.lb_buf,
1319 cconf->u.coc_layout.lb_len);
1321 RETURN(PTR_ERR(lsm));
1323 dump_lsm(D_INODE, lsm);
1326 /* no locking is necessary, as object is being created */
1327 lov->lo_type = lov_type(lsm);
1328 ops = &lov_dispatch[lov->lo_type];
1329 rc = ops->llo_init(env, dev, lov, lsm, cconf, set);
1339 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
1340 const struct cl_object_conf *conf)
1342 struct lov_stripe_md *lsm = NULL;
1343 struct lov_object *lov = cl2lov(obj);
1347 if (conf->coc_opc == OBJECT_CONF_SET &&
1348 conf->u.coc_layout.lb_buf != NULL) {
1349 lsm = lov_unpackmd(lov_object_dev(lov)->ld_lov,
1350 conf->u.coc_layout.lb_buf,
1351 conf->u.coc_layout.lb_len);
1353 RETURN(PTR_ERR(lsm));
1354 dump_lsm(D_INODE, lsm);
1358 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
1359 lov->lo_layout_invalid = true;
1360 GOTO(out, result = 0);
1363 if (conf->coc_opc == OBJECT_CONF_WAIT) {
1364 if (lov->lo_layout_invalid &&
1365 atomic_read(&lov->lo_active_ios) > 0) {
1366 lov_conf_unlock(lov);
1367 result = lov_layout_wait(env, lov);
1373 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
1375 if ((lsm == NULL && lov->lo_lsm == NULL) ||
1376 ((lsm != NULL && lov->lo_lsm != NULL) &&
1377 (lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
1378 (lov->lo_lsm->lsm_entries[0]->lsme_pattern ==
1379 lsm->lsm_entries[0]->lsme_pattern))) {
1380 /* same version of layout */
1381 lov->lo_layout_invalid = false;
1382 GOTO(out, result = 0);
1385 /* will change layout - check if there still exists active IO. */
1386 if (atomic_read(&lov->lo_active_ios) > 0) {
1387 lov->lo_layout_invalid = true;
1388 GOTO(out, result = -EBUSY);
1391 result = lov_layout_change(env, lov, lsm, conf);
1392 lov->lo_layout_invalid = result != 0;
1396 lov_conf_unlock(lov);
1398 CDEBUG(D_INODE, DFID" lo_layout_invalid=%d\n",
1399 PFID(lu_object_fid(lov2lu(lov))), lov->lo_layout_invalid);
1403 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
1405 struct lov_object *lov = lu2lov(obj);
1408 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
1412 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
1414 struct lov_object *lov = lu2lov(obj);
1417 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
1418 lu_object_fini(obj);
1419 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
1423 static int lov_object_print(const struct lu_env *env, void *cookie,
1424 lu_printer_t p, const struct lu_object *o)
1426 return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
1429 static int lov_page_init(const struct lu_env *env, struct cl_object *obj,
1430 struct cl_page *page, pgoff_t index)
1432 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_page_init, env, obj, page,
1437 * Implements cl_object_operations::clo_io_init() method for lov
1438 * layer. Dispatches to the appropriate layout io initialization method.
1440 static int lov_io_init(const struct lu_env *env, struct cl_object *obj,
1443 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_preserved);
1445 CDEBUG(D_INODE, DFID "io %p type %d ignore/verify layout %d/%d\n",
1446 PFID(lu_object_fid(&obj->co_lu)), io, io->ci_type,
1447 io->ci_ignore_layout, io->ci_verify_layout);
1449 /* IO type CIT_MISC with ci_ignore_layout set are usually invoked from
1450 * the OSC layer. It shouldn't take lov layout conf lock in that case,
1451 * because as long as the OSC object exists, the layout can't be
1453 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
1454 !(io->ci_ignore_layout && io->ci_type == CIT_MISC),
1459 * An implementation of cl_object_operations::clo_attr_get() method for lov
1460 * layer. For raid0 layout this collects and merges attributes of all
1463 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
1464 struct cl_attr *attr)
1466 /* do not take lock, as this function is called under a
1467 * spin-lock. Layout is protected from changing by ongoing IO. */
1468 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
1471 static int lov_attr_update(const struct lu_env *env, struct cl_object *obj,
1472 const struct cl_attr *attr, unsigned valid)
1475 * No dispatch is required here, as no layout implements this.
1480 static int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
1481 struct cl_lock *lock, const struct cl_io *io)
1483 /* No need to lock because we've taken one refcount of layout. */
1484 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
1489 * We calculate on which OST the mapping will end. If the length of mapping
1490 * is greater than (stripe_size * stripe_count) then the last_stripe will
1491 * will be one just before start_stripe. Else we check if the mapping
1492 * intersects each OST and find last_stripe.
1493 * This function returns the last_stripe and also sets the stripe_count
1494 * over which the mapping is spread
1496 * \param lsm [in] striping information for the file
1497 * \param index [in] stripe component index
1498 * \param ext [in] logical extent of mapping
1499 * \param start_stripe [in] starting stripe of the mapping
1500 * \param stripe_count [out] the number of stripes across which to map is
1503 * \retval last_stripe return the last stripe of the mapping
1505 static int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, int index,
1506 struct lu_extent *ext,
1507 int start_stripe, int *stripe_count)
1509 struct lov_stripe_md_entry *lsme = lsm->lsm_entries[index];
1514 init_stripe = lov_stripe_number(lsm, index, ext->e_start);
1516 if (ext->e_end - ext->e_start >
1517 lsme->lsme_stripe_size * lsme->lsme_stripe_count) {
1518 if (init_stripe == start_stripe) {
1519 last_stripe = (start_stripe < 1) ?
1520 lsme->lsme_stripe_count - 1 : start_stripe - 1;
1521 *stripe_count = lsme->lsme_stripe_count;
1522 } else if (init_stripe < start_stripe) {
1523 last_stripe = (init_stripe < 1) ?
1524 lsme->lsme_stripe_count - 1 : init_stripe - 1;
1525 *stripe_count = lsme->lsme_stripe_count -
1526 (start_stripe - init_stripe);
1528 last_stripe = init_stripe - 1;
1529 *stripe_count = init_stripe - start_stripe;
1532 for (j = 0, i = start_stripe; j < lsme->lsme_stripe_count;
1533 i = (i + 1) % lsme->lsme_stripe_count, j++) {
1534 if (!lov_stripe_intersects(lsm, index, i, ext, NULL,
1537 if ((start_stripe != init_stripe) && (i == init_stripe))
1541 last_stripe = (start_stripe + j - 1) % lsme->lsme_stripe_count;
1548 * Set fe_device and copy extents from local buffer into main return buffer.
1550 * \param fiemap [out] fiemap to hold all extents
1551 * \param lcl_fm_ext [in] array of fiemap extents get from OSC layer
1552 * \param ost_index [in] OST index to be written into the fm_device
1553 * field for each extent
1554 * \param ext_count [in] number of extents to be copied
1555 * \param current_extent [in] where to start copying in the extent array
1557 static void fiemap_prepare_and_copy_exts(struct fiemap *fiemap,
1558 struct fiemap_extent *lcl_fm_ext,
1559 int ost_index, unsigned int ext_count,
1560 int current_extent, int abs_stripeno)
1565 for (ext = 0; ext < ext_count; ext++) {
1566 set_fe_device_stripenr(&lcl_fm_ext[ext], ost_index,
1568 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
1571 /* Copy fm_extent's from fm_local to return buffer */
1572 to = (char *)fiemap + fiemap_count_to_size(current_extent);
1573 memcpy(to, lcl_fm_ext, ext_count * sizeof(struct fiemap_extent));
1576 #define FIEMAP_BUFFER_SIZE 4096
1579 * Non-zero fe_logical indicates that this is a continuation FIEMAP
1580 * call. The local end offset and the device are sent in the first
1581 * fm_extent. This function calculates the stripe number from the index.
1582 * This function returns a stripe_no on which mapping is to be restarted.
1584 * This function returns fm_end_offset which is the in-OST offset at which
1585 * mapping should be restarted. If fm_end_offset=0 is returned then caller
1586 * will re-calculate proper offset in next stripe.
1587 * Note that the first extent is passed to lov_get_info via the value field.
1589 * \param fiemap [in] fiemap request header
1590 * \param lsm [in] striping information for the file
1591 * \param index [in] stripe component index
1592 * \param ext [in] logical extent of mapping
1593 * \param start_stripe [out] starting stripe will be returned in this
1595 static u64 fiemap_calc_fm_end_offset(struct fiemap *fiemap,
1596 struct lov_stripe_md *lsm,
1597 int index, struct lu_extent *ext,
1600 struct lov_stripe_md_entry *lsme = lsm->lsm_entries[index];
1601 u64 local_end = fiemap->fm_extents[0].fe_logical;
1606 if (fiemap->fm_extent_count == 0 ||
1607 fiemap->fm_extents[0].fe_logical == 0)
1610 stripe_no = *start_stripe;
1612 if (stripe_no == -1)
1615 /* If we have finished mapping on previous device, shift logical
1616 * offset to start of next device */
1617 if (lov_stripe_intersects(lsm, index, stripe_no, ext, NULL, &lun_end) &&
1618 local_end < lun_end) {
1619 fm_end_offset = local_end;
1621 /* This is a special value to indicate that caller should
1622 * calculate offset in next stripe. */
1624 *start_stripe = (stripe_no + 1) % lsme->lsme_stripe_count;
1627 return fm_end_offset;
1630 struct fiemap_state {
1631 struct fiemap *fs_fm;
1632 struct lu_extent fs_ext; /* current entry extent */
1634 u64 fs_end_offset; /* last iteration offset */
1635 int fs_cur_extent; /* collected exts so far */
1636 int fs_cnt_need; /* # of extents buf can hold */
1637 int fs_start_stripe;
1639 bool fs_device_done; /* enough for this OST */
1640 bool fs_finish_stripe; /* reached fs_last_stripe */
1641 bool fs_enough; /* enough for this call */
1644 static struct cl_object *lov_find_subobj(const struct lu_env *env,
1645 struct lov_object *lov,
1646 struct lov_stripe_md *lsm,
1649 struct lov_device *dev = lu2lov_dev(lov2lu(lov)->lo_dev);
1650 struct lov_thread_info *lti = lov_env_info(env);
1651 struct lu_fid *ofid = <i->lti_fid;
1652 struct lov_oinfo *oinfo;
1653 struct cl_device *subdev;
1654 int entry = lov_comp_entry(index);
1655 int stripe = lov_comp_stripe(index);
1658 struct cl_object *result;
1660 if (lov->lo_type != LLT_COMP)
1661 GOTO(out, result = NULL);
1663 if (entry >= lsm->lsm_entry_count ||
1664 stripe >= lsm->lsm_entries[entry]->lsme_stripe_count)
1665 GOTO(out, result = NULL);
1667 oinfo = lsm->lsm_entries[entry]->lsme_oinfo[stripe];
1668 ost_idx = oinfo->loi_ost_idx;
1669 rc = ostid_to_fid(ofid, &oinfo->loi_oi, ost_idx);
1671 GOTO(out, result = NULL);
1673 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
1674 result = lov_sub_find(env, subdev, ofid, NULL);
1677 result = ERR_PTR(-EINVAL);
1681 static int fiemap_for_stripe(const struct lu_env *env, struct cl_object *obj,
1682 struct lov_stripe_md *lsm, struct fiemap *fiemap,
1683 size_t *buflen, struct ll_fiemap_info_key *fmkey,
1684 int index, int stripe_last, int stripeno,
1685 struct fiemap_state *fs)
1687 struct lov_stripe_md_entry *lsme = lsm->lsm_entries[index];
1688 struct cl_object *subobj;
1689 struct lov_obd *lov = lu2lov_dev(obj->co_lu.lo_dev)->ld_lov;
1690 struct fiemap_extent *fm_ext = &fs->fs_fm->fm_extents[0];
1691 u64 req_fm_len; /* max requested extent coverage */
1692 u64 len_mapped_single_call;
1695 unsigned int ext_count;
1696 /* EOF for object */
1697 bool ost_eof = false;
1698 /* done with required mapping for this OST? */
1699 bool ost_done = false;
1703 fs->fs_device_done = false;
1704 /* Find out range of mapping on this stripe */
1705 if ((lov_stripe_intersects(lsm, index, stripeno, &fs->fs_ext,
1706 &obd_start, &obd_end)) == 0)
1709 if (lov_oinfo_is_dummy(lsme->lsme_oinfo[stripeno]))
1712 /* If this is a continuation FIEMAP call and we are on
1713 * starting stripe then obd_start needs to be set to
1715 if (fs->fs_end_offset != 0 && stripeno == fs->fs_start_stripe)
1716 obd_start = fs->fs_end_offset;
1718 if (lov_size_to_stripe(lsm, index, fs->fs_ext.e_end, stripeno) ==
1722 req_fm_len = obd_end - obd_start + 1;
1723 fs->fs_fm->fm_length = 0;
1724 len_mapped_single_call = 0;
1726 /* find lobsub object */
1727 subobj = lov_find_subobj(env, cl2lov(obj), lsm,
1728 lov_comp_index(index, stripeno));
1730 return PTR_ERR(subobj);
1731 /* If the output buffer is very large and the objects have many
1732 * extents we may need to loop on a single OST repeatedly */
1734 if (fiemap->fm_extent_count > 0) {
1735 /* Don't get too many extents. */
1736 if (fs->fs_cur_extent + fs->fs_cnt_need >
1737 fiemap->fm_extent_count)
1738 fs->fs_cnt_need = fiemap->fm_extent_count -
1742 obd_start += len_mapped_single_call;
1743 fs->fs_fm->fm_length = req_fm_len - len_mapped_single_call;
1744 req_fm_len = fs->fs_fm->fm_length;
1746 * If we've collected enough extent map, we'd request 1 more,
1747 * to see whether we coincidentally finished all available
1748 * extent map, so that FIEMAP_EXTENT_LAST would be set.
1750 fs->fs_fm->fm_extent_count = fs->fs_enough ?
1751 1 : fs->fs_cnt_need;
1752 fs->fs_fm->fm_mapped_extents = 0;
1753 fs->fs_fm->fm_flags = fiemap->fm_flags;
1755 ost_index = lsme->lsme_oinfo[stripeno]->loi_ost_idx;
1757 if (ost_index < 0 || ost_index >= lov->desc.ld_tgt_count)
1758 GOTO(obj_put, rc = -EINVAL);
1759 /* If OST is inactive, return extent with UNKNOWN flag. */
1760 if (!lov->lov_tgts[ost_index]->ltd_active) {
1761 fs->fs_fm->fm_flags |= FIEMAP_EXTENT_LAST;
1762 fs->fs_fm->fm_mapped_extents = 1;
1764 fm_ext[0].fe_logical = obd_start;
1765 fm_ext[0].fe_length = obd_end - obd_start + 1;
1766 fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
1771 fs->fs_fm->fm_start = obd_start;
1772 fs->fs_fm->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
1773 memcpy(&fmkey->lfik_fiemap, fs->fs_fm, sizeof(*fs->fs_fm));
1774 *buflen = fiemap_count_to_size(fs->fs_fm->fm_extent_count);
1776 rc = cl_object_fiemap(env, subobj, fmkey, fs->fs_fm, buflen);
1780 ext_count = fs->fs_fm->fm_mapped_extents;
1781 if (ext_count == 0) {
1783 fs->fs_device_done = true;
1784 /* If last stripe has hold at the end,
1785 * we need to return */
1786 if (stripeno == fs->fs_last_stripe) {
1787 fiemap->fm_mapped_extents = 0;
1788 fs->fs_finish_stripe = true;
1792 } else if (fs->fs_enough) {
1794 * We've collected enough extents and there are
1795 * more extents after it.
1800 /* If we just need num of extents, got to next device */
1801 if (fiemap->fm_extent_count == 0) {
1802 fs->fs_cur_extent += ext_count;
1806 /* prepare to copy retrived map extents */
1807 len_mapped_single_call = fm_ext[ext_count - 1].fe_logical +
1808 fm_ext[ext_count - 1].fe_length -
1811 /* Have we finished mapping on this device? */
1812 if (req_fm_len <= len_mapped_single_call) {
1814 fs->fs_device_done = true;
1817 /* Clear the EXTENT_LAST flag which can be present on
1818 * the last extent */
1819 if (fm_ext[ext_count - 1].fe_flags & FIEMAP_EXTENT_LAST)
1820 fm_ext[ext_count - 1].fe_flags &= ~FIEMAP_EXTENT_LAST;
1821 if (lov_stripe_size(lsm, index,
1822 fm_ext[ext_count - 1].fe_logical +
1823 fm_ext[ext_count - 1].fe_length,
1824 stripeno) >= fmkey->lfik_oa.o_size) {
1826 fs->fs_device_done = true;
1829 fiemap_prepare_and_copy_exts(fiemap, fm_ext, ost_index,
1830 ext_count, fs->fs_cur_extent,
1831 stripe_last + stripeno);
1832 fs->fs_cur_extent += ext_count;
1834 /* Ran out of available extents? */
1835 if (fs->fs_cur_extent >= fiemap->fm_extent_count)
1836 fs->fs_enough = true;
1837 } while (!ost_done && !ost_eof);
1839 if (stripeno == fs->fs_last_stripe)
1840 fs->fs_finish_stripe = true;
1842 cl_object_put(env, subobj);
1848 * Break down the FIEMAP request and send appropriate calls to individual OSTs.
1849 * This also handles the restarting of FIEMAP calls in case mapping overflows
1850 * the available number of extents in single call.
1852 * \param env [in] lustre environment
1853 * \param obj [in] file object
1854 * \param fmkey [in] fiemap request header and other info
1855 * \param fiemap [out] fiemap buffer holding retrived map extents
1856 * \param buflen [in/out] max buffer length of @fiemap, when iterate
1857 * each OST, it is used to limit max map needed
1861 static int lov_object_fiemap(const struct lu_env *env, struct cl_object *obj,
1862 struct ll_fiemap_info_key *fmkey,
1863 struct fiemap *fiemap, size_t *buflen)
1865 struct lov_stripe_md_entry *lsme;
1866 struct lov_stripe_md *lsm;
1867 struct fiemap *fm_local = NULL;
1871 int start_entry = -1;
1875 unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
1877 struct fiemap_state fs = { 0 };
1878 struct lu_extent range;
1881 int start_stripe = 0;
1882 bool resume = false;
1885 lsm = lov_lsm_addref(cl2lov(obj));
1887 /* no extent: there is no object for mapping */
1888 fiemap->fm_mapped_extents = 0;
1892 if (!(fiemap->fm_flags & FIEMAP_FLAG_DEVICE_ORDER)) {
1894 * If the entry count > 1 or stripe_count > 1 and the
1895 * application does not understand DEVICE_ORDER flag,
1896 * it cannot interpret the extents correctly.
1898 if (lsm->lsm_entry_count > 1 ||
1899 (lsm->lsm_entry_count == 1 &&
1900 lsm->lsm_entries[0]->lsme_stripe_count > 1))
1901 GOTO(out_lsm, rc = -ENOTSUPP);
1904 /* No support for DOM layout yet. */
1905 if (lsme_is_dom(lsm->lsm_entries[0]))
1906 GOTO(out_lsm, rc = -ENOTSUPP);
1908 if (lsm->lsm_is_released) {
1909 if (fiemap->fm_start < fmkey->lfik_oa.o_size) {
1911 * released file, return a minimal FIEMAP if
1912 * request fits in file-size.
1914 fiemap->fm_mapped_extents = 1;
1915 fiemap->fm_extents[0].fe_logical = fiemap->fm_start;
1916 if (fiemap->fm_start + fiemap->fm_length <
1917 fmkey->lfik_oa.o_size)
1918 fiemap->fm_extents[0].fe_length =
1921 fiemap->fm_extents[0].fe_length =
1922 fmkey->lfik_oa.o_size -
1924 fiemap->fm_extents[0].fe_flags |=
1925 FIEMAP_EXTENT_UNKNOWN | FIEMAP_EXTENT_LAST;
1927 GOTO(out_lsm, rc = 0);
1930 /* buffer_size is small to hold fm_extent_count of extents. */
1931 if (fiemap_count_to_size(fiemap->fm_extent_count) < buffer_size)
1932 buffer_size = fiemap_count_to_size(fiemap->fm_extent_count);
1934 OBD_ALLOC_LARGE(fm_local, buffer_size);
1935 if (fm_local == NULL)
1936 GOTO(out_lsm, rc = -ENOMEM);
1939 * Requested extent count exceeds the fiemap buffer size, shrink our
1942 if (fiemap_count_to_size(fiemap->fm_extent_count) > *buflen)
1943 fiemap->fm_extent_count = fiemap_size_to_count(*buflen);
1945 fs.fs_enough = false;
1946 fs.fs_cur_extent = 0;
1947 fs.fs_fm = fm_local;
1948 fs.fs_cnt_need = fiemap_size_to_count(buffer_size);
1950 whole_start = fiemap->fm_start;
1951 /* whole_start is beyond the end of the file */
1952 if (whole_start > fmkey->lfik_oa.o_size)
1953 GOTO(out_fm_local, rc = -EINVAL);
1954 whole_end = (fiemap->fm_length == OBD_OBJECT_EOF) ?
1955 fmkey->lfik_oa.o_size + 1 :
1956 whole_start + fiemap->fm_length;
1958 * If fiemap->fm_length != OBD_OBJECT_EOF but whole_end exceeds file
1961 if (whole_end > fmkey->lfik_oa.o_size + 1)
1962 whole_end = fmkey->lfik_oa.o_size + 1;
1965 * the high 16bits of fe_device remember which stripe the last
1966 * call has been arrived, we'd continue from there in this call.
1968 if (fiemap->fm_extent_count && fiemap->fm_extents[0].fe_logical)
1970 stripe_last = get_fe_stripenr(&fiemap->fm_extents[0]);
1972 * stripe_last records stripe number we've been processed in the last
1975 end_entry = lsm->lsm_entry_count - 1;
1977 for (entry = 0; entry <= end_entry; entry++) {
1978 lsme = lsm->lsm_entries[entry];
1979 if (cur_stripe + lsme->lsme_stripe_count >= stripe_last) {
1980 start_entry = entry;
1981 start_stripe = stripe_last - cur_stripe;
1985 cur_stripe += lsme->lsme_stripe_count;
1987 if (start_entry == -1) {
1988 CERROR(DFID": FIEMAP does not init start entry, cur_stripe=%d, "
1989 "stripe_last=%d\n", PFID(lu_object_fid(&obj->co_lu)),
1990 cur_stripe, stripe_last);
1991 GOTO(out_fm_local, rc = -EINVAL);
1994 * @start_entry & @start_stripe records the position of fiemap
1995 * resumption @stripe_last keeps recording the absolution position
1996 * we'are processing. @resume indicates we'd honor @start_stripe.
1999 range.e_start = whole_start;
2000 range.e_end = whole_end;
2002 for (entry = start_entry; entry <= end_entry; entry++) {
2003 /* remeber to update stripe_last accordingly */
2004 lsme = lsm->lsm_entries[entry];
2006 /* FLR could contain component holes between entries */
2007 if (!lsme_inited(lsme)) {
2008 stripe_last += lsme->lsme_stripe_count;
2013 if (!lu_extent_is_overlapped(&range, &lsme->lsme_extent)) {
2014 stripe_last += lsme->lsme_stripe_count;
2019 /* prepare for a component entry iteration */
2020 if (lsme->lsme_extent.e_start > whole_start)
2021 fs.fs_ext.e_start = lsme->lsme_extent.e_start;
2023 fs.fs_ext.e_start = whole_start;
2024 if (lsme->lsme_extent.e_end > whole_end)
2025 fs.fs_ext.e_end = whole_end;
2027 fs.fs_ext.e_end = lsme->lsme_extent.e_end;
2029 /* Calculate start stripe, last stripe and length of mapping */
2031 fs.fs_start_stripe = start_stripe;
2032 /* put stripe_last to the first stripe of the comp */
2033 stripe_last -= start_stripe;
2036 fs.fs_start_stripe = lov_stripe_number(lsm, entry,
2039 fs.fs_last_stripe = fiemap_calc_last_stripe(lsm, entry,
2040 &fs.fs_ext, fs.fs_start_stripe,
2043 * A new mirror component is under process, reset
2044 * fs.fs_end_offset and then fiemap_for_stripe() starts from
2045 * the overlapping extent, otherwise starts from
2048 if (entry > start_entry && lsme->lsme_extent.e_start == 0) {
2050 fs.fs_end_offset = 0;
2052 fs.fs_end_offset = fiemap_calc_fm_end_offset(fiemap,
2053 lsm, entry, &fs.fs_ext,
2054 &fs.fs_start_stripe);
2057 /* Check each stripe */
2058 for (cur_stripe = fs.fs_start_stripe; stripe_count > 0;
2060 cur_stripe = (cur_stripe + 1) % lsme->lsme_stripe_count) {
2061 /* reset fs_finish_stripe */
2062 fs.fs_finish_stripe = false;
2063 rc = fiemap_for_stripe(env, obj, lsm, fiemap, buflen,
2064 fmkey, entry, stripe_last,
2067 GOTO(out_fm_local, rc);
2069 stripe_last += cur_stripe;
2072 if (fs.fs_finish_stripe)
2074 } /* for each stripe */
2075 stripe_last += lsme->lsme_stripe_count;
2076 } /* for covering layout component entry */
2079 if (fs.fs_cur_extent > 0)
2080 cur_ext = fs.fs_cur_extent - 1;
2084 /* done all the processing */
2085 if (entry > end_entry)
2086 fiemap->fm_extents[cur_ext].fe_flags |= FIEMAP_EXTENT_LAST;
2088 /* Indicate that we are returning device offsets unless file just has
2090 if (lsm->lsm_entry_count > 1 ||
2091 (lsm->lsm_entry_count == 1 &&
2092 lsm->lsm_entries[0]->lsme_stripe_count > 1))
2093 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
2095 if (fiemap->fm_extent_count == 0)
2096 goto skip_last_device_calc;
2098 skip_last_device_calc:
2099 fiemap->fm_mapped_extents = fs.fs_cur_extent;
2101 OBD_FREE_LARGE(fm_local, buffer_size);
2108 static int lov_object_getstripe(const struct lu_env *env, struct cl_object *obj,
2109 struct lov_user_md __user *lum, size_t size)
2111 struct lov_object *lov = cl2lov(obj);
2112 struct lov_stripe_md *lsm;
2116 lsm = lov_lsm_addref(lov);
2120 rc = lov_getstripe(env, cl2lov(obj), lsm, lum, size);
2125 static int lov_object_layout_get(const struct lu_env *env,
2126 struct cl_object *obj,
2127 struct cl_layout *cl)
2129 struct lov_object *lov = cl2lov(obj);
2130 struct lov_stripe_md *lsm = lov_lsm_addref(lov);
2131 struct lu_buf *buf = &cl->cl_buf;
2137 cl->cl_layout_gen = CL_LAYOUT_GEN_EMPTY;
2142 cl->cl_size = lov_comp_md_size(lsm);
2143 cl->cl_layout_gen = lsm->lsm_layout_gen;
2144 cl->cl_is_released = lsm->lsm_is_released;
2145 cl->cl_is_composite = lsm_is_composite(lsm->lsm_magic);
2147 rc = lov_lsm_pack(lsm, buf->lb_buf, buf->lb_len);
2150 RETURN(rc < 0 ? rc : 0);
2153 static loff_t lov_object_maxbytes(struct cl_object *obj)
2155 struct lov_object *lov = cl2lov(obj);
2156 struct lov_stripe_md *lsm = lov_lsm_addref(lov);
2162 maxbytes = lsm->lsm_maxbytes;
2169 static int lov_object_flush(const struct lu_env *env, struct cl_object *obj,
2170 struct ldlm_lock *lock)
2172 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_flush, true, env, obj,
2176 static const struct cl_object_operations lov_ops = {
2177 .coo_page_init = lov_page_init,
2178 .coo_lock_init = lov_lock_init,
2179 .coo_io_init = lov_io_init,
2180 .coo_attr_get = lov_attr_get,
2181 .coo_attr_update = lov_attr_update,
2182 .coo_conf_set = lov_conf_set,
2183 .coo_getstripe = lov_object_getstripe,
2184 .coo_layout_get = lov_object_layout_get,
2185 .coo_maxbytes = lov_object_maxbytes,
2186 .coo_fiemap = lov_object_fiemap,
2187 .coo_object_flush = lov_object_flush
2190 static const struct lu_object_operations lov_lu_obj_ops = {
2191 .loo_object_init = lov_object_init,
2192 .loo_object_delete = lov_object_delete,
2193 .loo_object_release = NULL,
2194 .loo_object_free = lov_object_free,
2195 .loo_object_print = lov_object_print,
2196 .loo_object_invariant = NULL,
2199 struct lu_object *lov_object_alloc(const struct lu_env *env,
2200 const struct lu_object_header *unused,
2201 struct lu_device *dev)
2203 struct lov_object *lov;
2204 struct lu_object *obj;
2207 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, GFP_NOFS);
2210 lu_object_init(obj, NULL, dev);
2211 lov->lo_cl.co_ops = &lov_ops;
2212 lov->lo_type = -1; /* invalid, to catch uninitialized type */
2214 * object io operation vector (cl_object::co_iop) is installed
2215 * later in lov_object_init(), as different vectors are used
2216 * for object with different layouts.
2218 obj->lo_ops = &lov_lu_obj_ops;
2224 static struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
2226 struct lov_stripe_md *lsm = NULL;
2228 lov_conf_freeze(lov);
2229 if (lov->lo_lsm != NULL) {
2230 lsm = lsm_addref(lov->lo_lsm);
2231 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
2232 lsm, atomic_read(&lsm->lsm_refc),
2233 lov->lo_layout_invalid, current);
2239 int lov_read_and_clear_async_rc(struct cl_object *clob)
2241 struct lu_object *luobj;
2245 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
2247 if (luobj != NULL) {
2248 struct lov_object *lov = lu2lov(luobj);
2250 lov_conf_freeze(lov);
2251 switch (lov->lo_type) {
2253 struct lov_stripe_md *lsm;
2257 LASSERT(lsm != NULL);
2258 for (i = 0; i < lsm->lsm_entry_count; i++) {
2259 struct lov_stripe_md_entry *lse =
2260 lsm->lsm_entries[i];
2263 if (!lsme_inited(lse))
2266 for (j = 0; j < lse->lsme_stripe_count; j++) {
2267 struct lov_oinfo *loi =
2270 if (lov_oinfo_is_dummy(loi))
2273 if (loi->loi_ar.ar_rc && !rc)
2274 rc = loi->loi_ar.ar_rc;
2275 loi->loi_ar.ar_rc = 0;
2291 EXPORT_SYMBOL(lov_read_and_clear_async_rc);