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/
31 * Implementation of cl_object for LOV layer.
33 * Author: Nikita Danilov <nikita.danilov@sun.com>
34 * Author: Jinshan Xiong <jinshan.xiong@whamcloud.com>
37 #define DEBUG_SUBSYSTEM S_LOV
39 #include <linux/random.h>
41 #include "lov_cl_internal.h"
43 static inline struct lov_device *lov_object_dev(struct lov_object *obj)
45 return lu2lov_dev(obj->lo_cl.co_lu.lo_dev);
52 /*****************************************************************************
58 struct lov_layout_operations {
59 int (*llo_init)(const struct lu_env *env, struct lov_device *dev,
60 struct lov_object *lov, struct lov_stripe_md *lsm,
61 const struct cl_object_conf *conf,
62 union lov_layout_state *state);
63 int (*llo_delete)(const struct lu_env *env, struct lov_object *lov,
64 union lov_layout_state *state);
65 void (*llo_fini)(const struct lu_env *env, struct lov_object *lov,
66 union lov_layout_state *state);
67 int (*llo_print)(const struct lu_env *env, void *cookie,
68 lu_printer_t p, const struct lu_object *o);
69 int (*llo_page_init)(const struct lu_env *env, struct cl_object *obj,
70 struct cl_page *page, pgoff_t index);
71 int (*llo_lock_init)(const struct lu_env *env,
72 struct cl_object *obj, struct cl_lock *lock,
73 const struct cl_io *io);
74 int (*llo_io_init)(const struct lu_env *env,
75 struct cl_object *obj, struct cl_io *io);
76 int (*llo_getattr)(const struct lu_env *env, struct cl_object *obj,
77 struct cl_attr *attr);
78 int (*llo_flush)(const struct lu_env *env, struct cl_object *obj,
79 struct ldlm_lock *lock);
82 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov);
83 static struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov);
85 static void lov_lsm_put(struct lov_stripe_md *lsm)
91 /*****************************************************************************
93 * Lov object layout operations.
97 static struct cl_object *lov_sub_find(const struct lu_env *env,
98 struct cl_device *dev,
99 const struct lu_fid *fid,
100 const struct cl_object_conf *conf)
106 o = lu_object_find_at(env, cl2lu_dev(dev), fid, &conf->coc_lu);
107 LASSERT(ergo(!IS_ERR(o), o->lo_dev->ld_type == &lovsub_device_type));
111 static int lov_page_slice_fixup(struct lov_object *lov,
112 struct cl_object *stripe)
114 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
118 return hdr->coh_page_bufsize - lov->lo_cl.co_slice_off -
119 cfs_size_round(sizeof(struct lov_page));
121 cl_object_for_each(o, stripe)
122 o->co_slice_off += hdr->coh_page_bufsize;
124 return cl_object_header(stripe)->coh_page_bufsize;
127 static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
128 struct cl_object *subobj, struct lov_oinfo *oinfo,
131 struct cl_object_header *hdr;
132 struct cl_object_header *subhdr;
133 struct cl_object_header *parent;
134 int entry = lov_comp_entry(idx);
135 int stripe = lov_comp_stripe(idx);
138 if (OBD_FAIL_CHECK(OBD_FAIL_LOV_INIT)) {
139 /* For sanity:test_206.
140 * Do not leave the object in cache to avoid accessing
141 * freed memory. This is because osc_object is referring to
142 * lov_oinfo of lsm_stripe_data which will be freed due to
144 cl_object_kill(env, subobj);
145 cl_object_put(env, subobj);
149 hdr = cl_object_header(lov2cl(lov));
150 subhdr = cl_object_header(subobj);
152 CDEBUG(D_INODE, DFID"@%p[%d:%d] -> "DFID"@%p: ostid: "DOSTID
153 " ost idx: %d gen: %d\n",
154 PFID(lu_object_fid(&subobj->co_lu)), subhdr, entry, stripe,
155 PFID(lu_object_fid(lov2lu(lov))), hdr, POSTID(&oinfo->loi_oi),
156 oinfo->loi_ost_idx, oinfo->loi_ost_gen);
158 /* reuse ->coh_attr_guard to protect coh_parent change */
159 spin_lock(&subhdr->coh_attr_guard);
160 parent = subhdr->coh_parent;
161 if (parent == NULL) {
162 struct lovsub_object *lso = cl2lovsub(subobj);
164 subhdr->coh_parent = hdr;
165 spin_unlock(&subhdr->coh_attr_guard);
166 subhdr->coh_nesting = hdr->coh_nesting + 1;
167 lu_object_ref_add(&subobj->co_lu, "lov-parent", lov);
168 lso->lso_super = lov;
169 lso->lso_index = idx;
172 struct lu_object *old_obj;
173 struct lov_object *old_lov;
174 unsigned int mask = D_INODE;
176 spin_unlock(&subhdr->coh_attr_guard);
177 old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
178 LASSERT(old_obj != NULL);
179 old_lov = cl2lov(lu2cl(old_obj));
180 if (test_bit(LO_LAYOUT_INVALID, &old_lov->lo_obj_flags)) {
181 /* the object's layout has already changed but isn't
183 lu_object_unhash(env, &subobj->co_lu);
190 LU_OBJECT_DEBUG(mask, env, &subobj->co_lu,
191 "stripe %d is already owned.", idx);
192 LU_OBJECT_DEBUG(mask, env, old_obj, "owned.");
193 LU_OBJECT_HEADER(mask, env, lov2lu(lov), "try to own.\n");
194 cl_object_put(env, subobj);
199 static int lov_init_raid0(const struct lu_env *env, struct lov_device *dev,
200 struct lov_object *lov, unsigned int index,
201 const struct cl_object_conf *conf,
202 struct lov_layout_entry *lle)
204 struct lov_layout_raid0 *r0 = &lle->lle_raid0;
205 struct lov_thread_info *lti = lov_env_info(env);
206 struct cl_object_conf *subconf = <i->lti_stripe_conf;
207 struct lu_fid *ofid = <i->lti_fid;
208 struct cl_object *stripe;
209 struct lov_stripe_md_entry *lse = lov_lse(lov, index);
216 spin_lock_init(&r0->lo_sub_lock);
217 r0->lo_nr = lse->lsme_stripe_count;
218 r0->lo_trunc_stripeno = -1;
220 OBD_ALLOC_PTR_ARRAY_LARGE(r0->lo_sub, r0->lo_nr);
221 if (r0->lo_sub == NULL)
222 GOTO(out, result = -ENOMEM);
226 memset(subconf, 0, sizeof(*subconf));
229 * Create stripe cl_objects.
231 for (i = 0; i < r0->lo_nr; ++i) {
232 struct cl_device *subdev;
233 struct lov_oinfo *oinfo = lse->lsme_oinfo[i];
234 int ost_idx = oinfo->loi_ost_idx;
236 if (lov_oinfo_is_dummy(oinfo))
239 result = ostid_to_fid(ofid, &oinfo->loi_oi, oinfo->loi_ost_idx);
243 if (dev->ld_target[ost_idx] == NULL) {
244 CERROR("%s: OST %04x is not initialized\n",
245 lov2obd(dev->ld_lov)->obd_name, ost_idx);
246 GOTO(out, result = -EIO);
249 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
250 subconf->u.coc_oinfo = oinfo;
251 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
252 /* In the function below, .hs_keycmp resolves to
253 * lu_obj_hop_keycmp() */
254 /* coverity[overrun-buffer-val] */
255 stripe = lov_sub_find(env, subdev, ofid, subconf);
257 GOTO(out, result = PTR_ERR(stripe));
259 result = lov_init_sub(env, lov, stripe, oinfo,
260 lov_comp_index(index, i));
261 if (result == -EAGAIN) { /* try again */
268 r0->lo_sub[i] = cl2lovsub(stripe);
270 sz = lov_page_slice_fixup(lov, stripe);
271 LASSERT(ergo(psz > 0, psz == sz));
281 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
282 struct lov_layout_raid0 *r0,
283 struct lovsub_object *los, int idx)
285 struct cl_object *sub;
286 struct lu_site *site;
287 wait_queue_head_t *wq;
289 LASSERT(r0->lo_sub[idx] == los);
291 sub = lovsub2cl(los);
292 site = sub->co_lu.lo_dev->ld_site;
293 wq = lu_site_wq_from_fid(site, &sub->co_lu.lo_header->loh_fid);
295 cl_object_kill(env, sub);
296 /* release a reference to the sub-object and ... */
297 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
298 cl_object_put(env, sub);
300 /* ... wait until it is actually destroyed---sub-object clears its
301 * ->lo_sub[] slot in lovsub_object_free() */
302 wait_event(*wq, r0->lo_sub[idx] != los);
303 LASSERT(r0->lo_sub[idx] == NULL);
306 static void lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
307 struct lov_layout_entry *lle)
309 struct lov_layout_raid0 *r0 = &lle->lle_raid0;
313 if (r0->lo_sub != NULL) {
316 for (i = 0; i < r0->lo_nr; ++i) {
317 struct lovsub_object *los = r0->lo_sub[i];
320 cl_object_prune(env, &los->lso_cl);
322 * If top-level object is to be evicted from
323 * the cache, so are its sub-objects.
325 lov_subobject_kill(env, lov, r0, los, i);
333 static void lov_fini_raid0(const struct lu_env *env,
334 struct lov_layout_entry *lle)
336 struct lov_layout_raid0 *r0 = &lle->lle_raid0;
338 if (r0->lo_sub != NULL) {
339 OBD_FREE_PTR_ARRAY_LARGE(r0->lo_sub, r0->lo_nr);
344 static int lov_print_raid0(const struct lu_env *env, void *cookie,
345 lu_printer_t p, const struct lov_layout_entry *lle)
347 const struct lov_layout_raid0 *r0 = &lle->lle_raid0;
350 for (i = 0; i < r0->lo_nr; ++i) {
351 struct lu_object *sub;
353 if (r0->lo_sub[i] != NULL) {
354 sub = lovsub2lu(r0->lo_sub[i]);
355 lu_object_print(env, cookie, p, sub);
357 (*p)(env, cookie, "sub %d absent\n", i);
363 static int lov_attr_get_raid0(const struct lu_env *env, struct lov_object *lov,
364 unsigned int index, struct lov_layout_entry *lle,
365 struct cl_attr **lov_attr)
367 struct lov_layout_raid0 *r0 = &lle->lle_raid0;
368 struct lov_stripe_md *lsm = lov->lo_lsm;
369 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
370 struct cl_attr *attr = &r0->lo_attr;
374 if (r0->lo_attr_valid) {
379 memset(lvb, 0, sizeof(*lvb));
381 /* XXX: timestamps can be negative by sanity:test_39m,
383 lvb->lvb_atime = LLONG_MIN;
384 lvb->lvb_ctime = LLONG_MIN;
385 lvb->lvb_mtime = LLONG_MIN;
388 * XXX that should be replaced with a loop over sub-objects,
389 * doing cl_object_attr_get() on them. But for now, let's
390 * reuse old lov code.
394 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
395 * happy. It's not needed, because new code uses
396 * ->coh_attr_guard spin-lock to protect consistency of
397 * sub-object attributes.
399 lov_stripe_lock(lsm);
400 result = lov_merge_lvb_kms(lsm, index, lvb, &kms);
401 lov_stripe_unlock(lsm);
403 cl_lvb2attr(attr, lvb);
405 r0->lo_attr_valid = 1;
412 static struct lov_comp_layout_entry_ops raid0_ops = {
413 .lco_init = lov_init_raid0,
414 .lco_fini = lov_fini_raid0,
415 .lco_getattr = lov_attr_get_raid0,
418 static int lov_attr_get_dom(const struct lu_env *env, struct lov_object *lov,
419 unsigned int index, struct lov_layout_entry *lle,
420 struct cl_attr **lov_attr)
422 struct lov_layout_dom *dom = &lle->lle_dom;
423 struct lov_oinfo *loi = dom->lo_loi;
424 struct cl_attr *attr = &dom->lo_dom_r0.lo_attr;
426 if (dom->lo_dom_r0.lo_attr_valid) {
431 if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks))
432 return OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
434 cl_lvb2attr(attr, &loi->loi_lvb);
436 /* DoM component size can be bigger than stripe size after
437 * client's setattr RPC, so do not count anything beyond
438 * component end. Alternatively, check that limit on server
439 * and do not allow size overflow there. */
440 if (attr->cat_size > lle->lle_extent->e_end)
441 attr->cat_size = lle->lle_extent->e_end;
443 attr->cat_kms = attr->cat_size;
445 dom->lo_dom_r0.lo_attr_valid = 1;
452 * Lookup FLD to get MDS index of the given DOM object FID.
454 * \param[in] ld LOV device
455 * \param[in] fid FID to lookup
456 * \param[out] nr index in MDC array to return back
458 * \retval 0 and \a mds filled with MDS index if successful
459 * \retval negative value on error
461 static int lov_fld_lookup(struct lov_device *ld, const struct lu_fid *fid,
469 rc = fld_client_lookup(&ld->ld_lmv->u.lmv.lmv_fld, fid_seq(fid),
470 &mds_idx, LU_SEQ_RANGE_MDT, NULL);
472 CERROR("%s: error while looking for mds number. Seq %#llx"
473 ", err = %d\n", lu_dev_name(cl2lu_dev(&ld->ld_cl)),
478 CDEBUG(D_INODE, "FLD lookup got mds #%x for fid="DFID"\n",
481 /* find proper MDC device in the array */
482 for (i = 0; i < ld->ld_md_tgts_nr; i++) {
483 if (ld->ld_md_tgts[i].ldm_mdc != NULL &&
484 ld->ld_md_tgts[i].ldm_idx == mds_idx)
488 if (i == ld->ld_md_tgts_nr) {
489 CERROR("%s: cannot find corresponding MDC device for mds #%x "
490 "for fid="DFID"\n", lu_dev_name(cl2lu_dev(&ld->ld_cl)),
500 * Implementation of lov_comp_layout_entry_ops::lco_init for DOM object.
502 * Init the DOM object for the first time. It prepares also RAID0 entry
503 * for it to use in common methods with ordinary RAID0 layout entries.
505 * \param[in] env execution environment
506 * \param[in] dev LOV device
507 * \param[in] lov LOV object
508 * \param[in] index Composite layout entry index in LSM
509 * \param[in] lle Composite LOV layout entry
511 static int lov_init_dom(const struct lu_env *env, struct lov_device *dev,
512 struct lov_object *lov, unsigned int index,
513 const struct cl_object_conf *conf,
514 struct lov_layout_entry *lle)
516 struct lov_thread_info *lti = lov_env_info(env);
517 struct lov_stripe_md_entry *lsme = lov_lse(lov, index);
518 struct cl_object *clo;
519 struct lu_object *o = lov2lu(lov);
520 const struct lu_fid *fid = lu_object_fid(o);
521 struct cl_device *mdcdev;
522 struct lov_oinfo *loi = NULL;
523 struct cl_object_conf *sconf = <i->lti_stripe_conf;
529 /* DOM entry may be not zero index due to FLR but must start from 0 */
530 if (unlikely(lle->lle_extent->e_start != 0)) {
531 CERROR("%s: DOM entry must be the first stripe in a mirror\n",
532 lov2obd(dev->ld_lov)->obd_name);
533 dump_lsm(D_ERROR, lov->lo_lsm);
537 /* find proper MDS device */
538 rc = lov_fld_lookup(dev, fid, &idx);
542 LASSERTF(dev->ld_md_tgts[idx].ldm_mdc != NULL,
543 "LOV md target[%u] is NULL\n", idx);
545 /* check lsm is DOM, more checks are needed */
546 LASSERT(lsme->lsme_stripe_count == 0);
549 * Create lower cl_objects.
551 mdcdev = dev->ld_md_tgts[idx].ldm_mdc;
553 LASSERTF(mdcdev != NULL, "non-initialized mdc subdev\n");
555 /* DoM object has no oinfo in LSM entry, create it exclusively */
556 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS);
560 fid_to_ostid(lu_object_fid(lov2lu(lov)), &loi->loi_oi);
562 sconf->u.coc_oinfo = loi;
564 clo = lov_sub_find(env, mdcdev, fid, sconf);
566 GOTO(out, rc = PTR_ERR(clo));
568 rc = lov_init_sub(env, lov, clo, loi, lov_comp_index(index, 0));
569 if (rc == -EAGAIN) /* try again */
574 lle->lle_dom.lo_dom = cl2lovsub(clo);
575 spin_lock_init(&lle->lle_dom.lo_dom_r0.lo_sub_lock);
576 lle->lle_dom.lo_dom_r0.lo_nr = 1;
577 lle->lle_dom.lo_dom_r0.lo_sub = &lle->lle_dom.lo_dom;
578 lle->lle_dom.lo_loi = loi;
580 rc = lov_page_slice_fixup(lov, clo);
585 OBD_SLAB_FREE_PTR(loi, lov_oinfo_slab);
590 * Implementation of lov_layout_operations::llo_fini for DOM object.
592 * Finish the DOM object and free related memory.
594 * \param[in] env execution environment
595 * \param[in] lov LOV object
596 * \param[in] state LOV layout state
598 static void lov_fini_dom(const struct lu_env *env,
599 struct lov_layout_entry *lle)
601 if (lle->lle_dom.lo_dom != NULL)
602 lle->lle_dom.lo_dom = NULL;
603 if (lle->lle_dom.lo_loi != NULL)
604 OBD_SLAB_FREE_PTR(lle->lle_dom.lo_loi, lov_oinfo_slab);
607 static struct lov_comp_layout_entry_ops dom_ops = {
608 .lco_init = lov_init_dom,
609 .lco_fini = lov_fini_dom,
610 .lco_getattr = lov_attr_get_dom,
613 static int lov_init_composite(const struct lu_env *env, struct lov_device *dev,
614 struct lov_object *lov, struct lov_stripe_md *lsm,
615 const struct cl_object_conf *conf,
616 union lov_layout_state *state)
618 struct lov_layout_composite *comp = &state->composite;
619 struct lov_layout_entry *lle;
620 struct lov_mirror_entry *lre;
621 unsigned int entry_count;
622 unsigned int psz = 0;
623 unsigned int mirror_count;
624 int flr_state = lsm->lsm_flags & LCM_FL_FLR_MASK;
632 LASSERT(lsm->lsm_entry_count > 0);
633 LASSERT(lov->lo_lsm == NULL);
634 lov->lo_lsm = lsm_addref(lsm);
635 set_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
637 dump_lsm(D_INODE, lsm);
639 entry_count = lsm->lsm_entry_count;
641 spin_lock_init(&comp->lo_write_lock);
642 comp->lo_flags = lsm->lsm_flags;
643 comp->lo_mirror_count = lsm->lsm_mirror_count + 1;
644 comp->lo_entry_count = lsm->lsm_entry_count;
645 comp->lo_preferred_mirror = -1;
647 if (equi(flr_state == LCM_FL_NONE, comp->lo_mirror_count > 1))
650 OBD_ALLOC_PTR_ARRAY(comp->lo_mirrors, comp->lo_mirror_count);
651 if (comp->lo_mirrors == NULL)
654 OBD_ALLOC_PTR_ARRAY(comp->lo_entries, entry_count);
655 if (comp->lo_entries == NULL)
658 /* Initiate all entry types and extents data at first */
659 for (i = 0, j = 0, mirror_count = 1; i < entry_count; i++) {
662 lle = &comp->lo_entries[i];
664 lle->lle_lsme = lsm->lsm_entries[i];
665 lle->lle_type = lov_entry_type(lle->lle_lsme);
666 switch (lle->lle_type) {
667 case LOV_PATTERN_RAID0:
668 lle->lle_comp_ops = &raid0_ops;
670 case LOV_PATTERN_MDT:
671 /* Allowed to have several DOM stripes in different
672 * mirrors with the same DoM size.
675 dom_size = lle->lle_lsme->lsme_extent.e_end;
676 } else if (dom_size !=
677 lle->lle_lsme->lsme_extent.e_end) {
678 CERROR("%s: DOM entries with different sizes\n",
679 lov2obd(dev->ld_lov)->obd_name);
680 dump_lsm(D_ERROR, lsm);
683 lle->lle_comp_ops = &dom_ops;
685 case LOV_PATTERN_FOREIGN:
686 lle->lle_comp_ops = NULL;
689 CERROR("%s: unknown composite layout entry type %i\n",
690 lov2obd(dev->ld_lov)->obd_name,
691 lsm->lsm_entries[i]->lsme_pattern);
692 dump_lsm(D_ERROR, lsm);
696 lle->lle_extent = &lle->lle_lsme->lsme_extent;
697 lle->lle_valid = !(lle->lle_lsme->lsme_flags & LCME_FL_STALE);
699 if (flr_state != LCM_FL_NONE)
700 mirror_id = mirror_id_of(lle->lle_lsme->lsme_id);
702 lre = &comp->lo_mirrors[j];
704 if (mirror_id == lre->lre_mirror_id) {
705 lre->lre_valid |= lle->lle_valid;
706 lre->lre_stale |= !lle->lle_valid;
708 lsme_is_foreign(lle->lle_lsme);
713 /* new mirror detected, assume that the mirrors
714 * are shorted in layout */
717 if (j >= comp->lo_mirror_count)
720 lre = &comp->lo_mirrors[j];
723 /* entries must be sorted by mirrors */
724 lre->lre_mirror_id = mirror_id;
725 lre->lre_start = lre->lre_end = i;
726 lre->lre_preferred = !!(lle->lle_lsme->lsme_flags &
728 lre->lre_valid = lle->lle_valid;
729 lre->lre_stale = !lle->lle_valid;
730 lre->lre_foreign = lsme_is_foreign(lle->lle_lsme);
733 /* sanity check for FLR */
734 if (mirror_count != comp->lo_mirror_count) {
736 " doesn't have the # of mirrors it claims, %u/%u\n",
737 PFID(lu_object_fid(lov2lu(lov))), mirror_count,
738 comp->lo_mirror_count + 1);
740 GOTO(out, result = -EINVAL);
743 lov_foreach_layout_entry(lov, lle) {
744 int index = lov_layout_entry_index(lov, lle);
747 * If the component has not been init-ed on MDS side, for
748 * PFL layout, we'd know that the components beyond this one
749 * will be dynamically init-ed later on file write/trunc ops.
751 if (!lsme_inited(lle->lle_lsme))
754 if (lsme_is_foreign(lle->lle_lsme))
757 result = lle->lle_comp_ops->lco_init(env, dev, lov, index,
762 LASSERT(ergo(psz > 0, psz == result));
767 cl_object_header(&lov->lo_cl)->coh_page_bufsize += psz;
769 /* decide the preferred mirror. It uses the hash value of lov_object
770 * so that different clients would use different mirrors for read. */
772 seq = hash_long((unsigned long)lov, 8);
773 for (i = 0; i < comp->lo_mirror_count; i++) {
774 unsigned int idx = (i + seq) % comp->lo_mirror_count;
776 lre = lov_mirror_entry(lov, idx);
780 if (lre->lre_foreign)
783 mirror_count++; /* valid mirror */
785 if (lre->lre_preferred || comp->lo_preferred_mirror < 0)
786 comp->lo_preferred_mirror = idx;
790 " doesn't have any valid mirrors\n",
791 PFID(lu_object_fid(lov2lu(lov))));
793 comp->lo_preferred_mirror = 0;
796 LASSERT(comp->lo_preferred_mirror >= 0);
800 return result > 0 ? 0 : result;
803 static int lov_init_empty(const struct lu_env *env, struct lov_device *dev,
804 struct lov_object *lov, struct lov_stripe_md *lsm,
805 const struct cl_object_conf *conf,
806 union lov_layout_state *state)
811 static int lov_init_released(const struct lu_env *env,
812 struct lov_device *dev, struct lov_object *lov,
813 struct lov_stripe_md *lsm,
814 const struct cl_object_conf *conf,
815 union lov_layout_state *state)
817 LASSERT(lsm != NULL);
818 LASSERT(lsm->lsm_is_released);
819 LASSERT(lov->lo_lsm == NULL);
821 lov->lo_lsm = lsm_addref(lsm);
825 static int lov_init_foreign(const struct lu_env *env,
826 struct lov_device *dev, struct lov_object *lov,
827 struct lov_stripe_md *lsm,
828 const struct cl_object_conf *conf,
829 union lov_layout_state *state)
831 LASSERT(lsm != NULL);
832 LASSERT(lov->lo_type == LLT_FOREIGN);
833 LASSERT(lov->lo_lsm == NULL);
835 lov->lo_lsm = lsm_addref(lsm);
839 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
840 union lov_layout_state *state)
842 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED ||
843 lov->lo_type == LLT_FOREIGN);
845 lov_layout_wait(env, lov);
849 static int lov_delete_composite(const struct lu_env *env,
850 struct lov_object *lov,
851 union lov_layout_state *state)
853 struct lov_layout_entry *entry;
854 struct lov_layout_composite *comp = &state->composite;
858 dump_lsm(D_INODE, lov->lo_lsm);
860 lov_layout_wait(env, lov);
861 if (comp->lo_entries)
862 lov_foreach_layout_entry(lov, entry) {
863 if (entry->lle_lsme && lsme_is_foreign(entry->lle_lsme))
866 lov_delete_raid0(env, lov, entry);
872 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
873 union lov_layout_state *state)
875 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
878 static void lov_fini_composite(const struct lu_env *env,
879 struct lov_object *lov,
880 union lov_layout_state *state)
882 struct lov_layout_composite *comp = &state->composite;
885 if (comp->lo_entries != NULL) {
886 struct lov_layout_entry *entry;
888 lov_foreach_layout_entry(lov, entry)
889 if (entry->lle_comp_ops)
890 entry->lle_comp_ops->lco_fini(env, entry);
892 OBD_FREE_PTR_ARRAY(comp->lo_entries, comp->lo_entry_count);
893 comp->lo_entries = NULL;
896 if (comp->lo_mirrors != NULL) {
897 OBD_FREE_PTR_ARRAY(comp->lo_mirrors, comp->lo_mirror_count);
898 comp->lo_mirrors = NULL;
901 memset(comp, 0, sizeof(*comp));
903 dump_lsm(D_INODE, lov->lo_lsm);
904 lov_free_memmd(&lov->lo_lsm);
909 static void lov_fini_released(const struct lu_env *env, struct lov_object *lov,
910 union lov_layout_state *state)
913 dump_lsm(D_INODE, lov->lo_lsm);
914 lov_free_memmd(&lov->lo_lsm);
918 static int lov_print_empty(const struct lu_env *env, void *cookie,
919 lu_printer_t p, const struct lu_object *o)
921 (*p)(env, cookie, "empty %d\n",
922 test_bit(LO_LAYOUT_INVALID, &lu2lov(o)->lo_obj_flags));
926 static int lov_print_composite(const struct lu_env *env, void *cookie,
927 lu_printer_t p, const struct lu_object *o)
929 struct lov_object *lov = lu2lov(o);
930 struct lov_stripe_md *lsm = lov->lo_lsm;
933 (*p)(env, cookie, "entries: %d, %s, lsm{%p 0x%08X %d %u}:\n",
934 lsm->lsm_entry_count,
935 test_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags) ? "invalid" :
936 "valid", lsm, lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
937 lsm->lsm_layout_gen);
939 for (i = 0; i < lsm->lsm_entry_count; i++) {
940 struct lov_stripe_md_entry *lse = lsm->lsm_entries[i];
941 struct lov_layout_entry *lle = lov_entry(lov, i);
944 DEXT ": { 0x%08X, %u, %#x, %u, %#x, %u, %u }\n",
945 PEXT(&lse->lsme_extent), lse->lsme_magic,
946 lse->lsme_id, lse->lsme_pattern, lse->lsme_layout_gen,
947 lse->lsme_flags, lse->lsme_stripe_count,
948 lse->lsme_stripe_size);
950 if (!lsme_is_foreign(lse))
951 lov_print_raid0(env, cookie, p, lle);
957 static int lov_print_released(const struct lu_env *env, void *cookie,
958 lu_printer_t p, const struct lu_object *o)
960 struct lov_object *lov = lu2lov(o);
961 struct lov_stripe_md *lsm = lov->lo_lsm;
964 "released: %s, lsm{%p 0x%08X %d %u}:\n",
965 test_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags) ? "invalid" :
966 "valid", lsm, lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
967 lsm->lsm_layout_gen);
971 static int lov_print_foreign(const struct lu_env *env, void *cookie,
972 lu_printer_t p, const struct lu_object *o)
974 struct lov_object *lov = lu2lov(o);
975 struct lov_stripe_md *lsm = lov->lo_lsm;
978 "foreign: %s, lsm{%p 0x%08X %d %u}:\n",
979 test_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags) ?
980 "invalid" : "valid", lsm,
981 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
982 lsm->lsm_layout_gen);
984 "raw_ea_content '%.*s'\n",
985 (int)lsm->lsm_foreign_size, (char *)lsm_foreign(lsm));
990 * Implements cl_object_operations::coo_attr_get() method for an object
991 * without stripes (LLT_EMPTY layout type).
993 * The only attributes this layer is authoritative in this case is
994 * cl_attr::cat_blocks---it's 0.
996 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
997 struct cl_attr *attr)
999 attr->cat_blocks = 0;
1003 static int lov_attr_get_composite(const struct lu_env *env,
1004 struct cl_object *obj,
1005 struct cl_attr *attr)
1007 struct lov_object *lov = cl2lov(obj);
1008 struct lov_layout_entry *entry;
1014 attr->cat_blocks = 0;
1015 lov_foreach_layout_entry(lov, entry) {
1016 struct cl_attr *lov_attr = NULL;
1017 int index = lov_layout_entry_index(lov, entry);
1019 if (!entry->lle_valid)
1022 /* PFL: This component has not been init-ed. */
1023 if (!lsm_entry_inited(lov->lo_lsm, index))
1026 result = entry->lle_comp_ops->lco_getattr(env, lov, index,
1031 if (lov_attr == NULL)
1034 CDEBUG(D_INODE, "COMP ID #%i: s=%llu m=%llu a=%llu c=%llu "
1035 "b=%llu\n", index - 1, lov_attr->cat_size,
1036 lov_attr->cat_mtime, lov_attr->cat_atime,
1037 lov_attr->cat_ctime, lov_attr->cat_blocks);
1040 attr->cat_blocks += lov_attr->cat_blocks;
1041 if (attr->cat_size < lov_attr->cat_size)
1042 attr->cat_size = lov_attr->cat_size;
1043 if (attr->cat_kms < lov_attr->cat_kms)
1044 attr->cat_kms = lov_attr->cat_kms;
1045 if (attr->cat_atime < lov_attr->cat_atime)
1046 attr->cat_atime = lov_attr->cat_atime;
1047 if (attr->cat_ctime < lov_attr->cat_ctime)
1048 attr->cat_ctime = lov_attr->cat_ctime;
1049 if (attr->cat_mtime < lov_attr->cat_mtime)
1050 attr->cat_mtime = lov_attr->cat_mtime;
1056 static int lov_flush_composite(const struct lu_env *env,
1057 struct cl_object *obj,
1058 struct ldlm_lock *lock)
1060 struct lov_object *lov = cl2lov(obj);
1061 struct lov_layout_entry *lle;
1066 lov_foreach_layout_entry(lov, lle) {
1067 if (!lsme_is_dom(lle->lle_lsme))
1069 rc = cl_object_flush(env, lovsub2cl(lle->lle_dom.lo_dom), lock);
1076 static int lov_flush_empty(const struct lu_env *env, struct cl_object *obj,
1077 struct ldlm_lock *lock)
1082 const static struct lov_layout_operations lov_dispatch[] = {
1084 .llo_init = lov_init_empty,
1085 .llo_delete = lov_delete_empty,
1086 .llo_fini = lov_fini_empty,
1087 .llo_print = lov_print_empty,
1088 .llo_page_init = lov_page_init_empty,
1089 .llo_lock_init = lov_lock_init_empty,
1090 .llo_io_init = lov_io_init_empty,
1091 .llo_getattr = lov_attr_get_empty,
1092 .llo_flush = lov_flush_empty,
1095 .llo_init = lov_init_released,
1096 .llo_delete = lov_delete_empty,
1097 .llo_fini = lov_fini_released,
1098 .llo_print = lov_print_released,
1099 .llo_page_init = lov_page_init_empty,
1100 .llo_lock_init = lov_lock_init_empty,
1101 .llo_io_init = lov_io_init_released,
1102 .llo_getattr = lov_attr_get_empty,
1103 .llo_flush = lov_flush_empty,
1106 .llo_init = lov_init_composite,
1107 .llo_delete = lov_delete_composite,
1108 .llo_fini = lov_fini_composite,
1109 .llo_print = lov_print_composite,
1110 .llo_page_init = lov_page_init_composite,
1111 .llo_lock_init = lov_lock_init_composite,
1112 .llo_io_init = lov_io_init_composite,
1113 .llo_getattr = lov_attr_get_composite,
1114 .llo_flush = lov_flush_composite,
1117 .llo_init = lov_init_foreign,
1118 .llo_delete = lov_delete_empty,
1119 .llo_fini = lov_fini_released,
1120 .llo_print = lov_print_foreign,
1121 .llo_page_init = lov_page_init_foreign,
1122 .llo_lock_init = lov_lock_init_empty,
1123 .llo_io_init = lov_io_init_empty,
1124 .llo_getattr = lov_attr_get_empty,
1125 .llo_flush = lov_flush_empty,
1130 * Performs a double-dispatch based on the layout type of an object.
1132 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
1134 struct lov_object *__obj = (obj); \
1135 enum lov_layout_type __llt; \
1137 __llt = __obj->lo_type; \
1138 LASSERT(__llt < ARRAY_SIZE(lov_dispatch)); \
1139 lov_dispatch[__llt].op(__VA_ARGS__); \
1143 * Return lov_layout_type associated with a given lsm
1145 static enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
1150 if (lsm->lsm_is_released)
1151 return LLT_RELEASED;
1153 if (lsm->lsm_magic == LOV_MAGIC_V1 ||
1154 lsm->lsm_magic == LOV_MAGIC_V3 ||
1155 lsm->lsm_magic == LOV_MAGIC_COMP_V1)
1158 if (lsm->lsm_magic == LOV_MAGIC_FOREIGN)
1164 static inline void lov_conf_freeze(struct lov_object *lov)
1166 CDEBUG(D_INODE, "To take share lov(%p) owner %p/%p\n",
1167 lov, lov->lo_owner, current);
1168 if (lov->lo_owner != current)
1169 down_read(&lov->lo_type_guard);
1172 static inline void lov_conf_thaw(struct lov_object *lov)
1174 CDEBUG(D_INODE, "To release share lov(%p) owner %p/%p\n",
1175 lov, lov->lo_owner, current);
1176 if (lov->lo_owner != current)
1177 up_read(&lov->lo_type_guard);
1180 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
1182 struct lov_object *__obj = (obj); \
1183 int __lock = !!(lock); \
1184 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
1187 lov_conf_freeze(__obj); \
1188 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
1190 lov_conf_thaw(__obj); \
1195 * Performs a locked double-dispatch based on the layout type of an object.
1197 #define LOV_2DISPATCH(obj, op, ...) \
1198 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
1200 #define LOV_2DISPATCH_VOID(obj, op, ...) \
1202 struct lov_object *__obj = (obj); \
1203 enum lov_layout_type __llt; \
1205 lov_conf_freeze(__obj); \
1206 __llt = __obj->lo_type; \
1207 LASSERT(__llt < ARRAY_SIZE(lov_dispatch)); \
1208 lov_dispatch[__llt].op(__VA_ARGS__); \
1209 lov_conf_thaw(__obj); \
1212 static void lov_conf_lock(struct lov_object *lov)
1214 LASSERT(lov->lo_owner != current);
1215 down_write(&lov->lo_type_guard);
1216 LASSERT(lov->lo_owner == NULL);
1217 lov->lo_owner = current;
1218 CDEBUG(D_INODE, "Took exclusive lov(%p) owner %p\n",
1219 lov, lov->lo_owner);
1222 static void lov_conf_unlock(struct lov_object *lov)
1224 CDEBUG(D_INODE, "To release exclusive lov(%p) owner %p\n",
1225 lov, lov->lo_owner);
1226 lov->lo_owner = NULL;
1227 up_write(&lov->lo_type_guard);
1230 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
1234 while (atomic_read(&lov->lo_active_ios) > 0) {
1235 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
1236 PFID(lu_object_fid(lov2lu(lov))),
1237 atomic_read(&lov->lo_active_ios));
1239 wait_event_idle(lov->lo_waitq,
1240 atomic_read(&lov->lo_active_ios) == 0);
1245 static int lov_layout_change(const struct lu_env *unused,
1246 struct lov_object *lov, struct lov_stripe_md *lsm,
1247 const struct cl_object_conf *conf)
1249 enum lov_layout_type llt = lov_type(lsm);
1250 union lov_layout_state *state = &lov->u;
1251 const struct lov_layout_operations *old_ops;
1252 const struct lov_layout_operations *new_ops;
1253 struct lov_device *lov_dev = lov_object_dev(lov);
1259 LASSERT(lov->lo_type < ARRAY_SIZE(lov_dispatch));
1261 env = cl_env_get(&refcheck);
1263 RETURN(PTR_ERR(env));
1265 LASSERT(llt < ARRAY_SIZE(lov_dispatch));
1267 CDEBUG(D_INODE, DFID" from %s to %s\n",
1268 PFID(lu_object_fid(lov2lu(lov))),
1269 llt2str(lov->lo_type), llt2str(llt));
1271 old_ops = &lov_dispatch[lov->lo_type];
1272 new_ops = &lov_dispatch[llt];
1274 rc = cl_object_prune(env, &lov->lo_cl);
1278 rc = old_ops->llo_delete(env, lov, &lov->u);
1282 old_ops->llo_fini(env, lov, &lov->u);
1284 LASSERT(atomic_read(&lov->lo_active_ios) == 0);
1286 CDEBUG(D_INODE, DFID "Apply new layout lov %p, type %d\n",
1287 PFID(lu_object_fid(lov2lu(lov))), lov, llt);
1289 /* page bufsize fixup */
1290 cl_object_header(&lov->lo_cl)->coh_page_bufsize -=
1291 lov_page_slice_fixup(lov, NULL);
1294 rc = new_ops->llo_init(env, lov_dev, lov, lsm, conf, state);
1296 struct obd_device *obd = lov2obd(lov_dev->ld_lov);
1298 CERROR("%s: cannot apply new layout on "DFID" : rc = %d\n",
1299 obd->obd_name, PFID(lu_object_fid(lov2lu(lov))), rc);
1300 new_ops->llo_delete(env, lov, state);
1301 new_ops->llo_fini(env, lov, state);
1302 /* this file becomes an EMPTY file. */
1303 lov->lo_type = LLT_EMPTY;
1308 cl_env_put(env, &refcheck);
1312 /*****************************************************************************
1314 * Lov object operations.
1317 static int lov_object_init(const struct lu_env *env, struct lu_object *obj,
1318 const struct lu_object_conf *conf)
1320 struct lov_object *lov = lu2lov(obj);
1321 struct lov_device *dev = lov_object_dev(lov);
1322 const struct cl_object_conf *cconf = lu2cl_conf(conf);
1323 union lov_layout_state *set = &lov->u;
1324 const struct lov_layout_operations *ops;
1325 struct lov_stripe_md *lsm = NULL;
1329 init_rwsem(&lov->lo_type_guard);
1330 atomic_set(&lov->lo_active_ios, 0);
1331 init_waitqueue_head(&lov->lo_waitq);
1332 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
1334 lov->lo_type = LLT_EMPTY;
1335 if (cconf->u.coc_layout.lb_buf != NULL) {
1336 lsm = lov_unpackmd(dev->ld_lov,
1337 cconf->u.coc_layout.lb_buf,
1338 cconf->u.coc_layout.lb_len);
1340 RETURN(PTR_ERR(lsm));
1342 dump_lsm(D_INODE, lsm);
1345 /* no locking is necessary, as object is being created */
1346 lov->lo_type = lov_type(lsm);
1347 ops = &lov_dispatch[lov->lo_type];
1348 rc = ops->llo_init(env, dev, lov, lsm, cconf, set);
1358 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
1359 const struct cl_object_conf *conf)
1361 struct lov_stripe_md *lsm = NULL;
1362 struct lov_object *lov = cl2lov(obj);
1366 if (conf->coc_opc == OBJECT_CONF_SET &&
1367 conf->u.coc_layout.lb_buf != NULL) {
1368 lsm = lov_unpackmd(lov_object_dev(lov)->ld_lov,
1369 conf->u.coc_layout.lb_buf,
1370 conf->u.coc_layout.lb_len);
1372 RETURN(PTR_ERR(lsm));
1373 dump_lsm(D_INODE, lsm);
1376 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
1377 set_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
1378 GOTO(out_lsm, result = 0);
1382 if (conf->coc_opc == OBJECT_CONF_WAIT) {
1383 if (test_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags) &&
1384 atomic_read(&lov->lo_active_ios) > 0) {
1385 lov_conf_unlock(lov);
1386 result = lov_layout_wait(env, lov);
1392 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
1394 if ((lsm == NULL && lov->lo_lsm == NULL) ||
1395 ((lsm != NULL && lov->lo_lsm != NULL) &&
1396 (lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
1397 (lov->lo_lsm->lsm_flags == lsm->lsm_flags) &&
1398 (lov->lo_lsm->lsm_entries[0]->lsme_pattern ==
1399 lsm->lsm_entries[0]->lsme_pattern))) {
1400 /* same version of layout */
1401 clear_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
1402 GOTO(out, result = 0);
1405 /* will change layout - check if there still exists active IO. */
1406 if (atomic_read(&lov->lo_active_ios) > 0) {
1407 set_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
1408 GOTO(out, result = -EBUSY);
1411 result = lov_layout_change(env, lov, lsm, conf);
1413 set_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
1415 clear_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags);
1419 lov_conf_unlock(lov);
1422 CDEBUG(D_INODE, DFID" lo_layout_invalid=%u\n",
1423 PFID(lu_object_fid(lov2lu(lov))),
1424 test_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags));
1428 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
1430 struct lov_object *lov = lu2lov(obj);
1433 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
1437 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
1439 struct lov_object *lov = lu2lov(obj);
1442 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
1443 lu_object_fini(obj);
1444 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
1448 static int lov_object_print(const struct lu_env *env, void *cookie,
1449 lu_printer_t p, const struct lu_object *o)
1451 return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
1454 static int lov_page_init(const struct lu_env *env, struct cl_object *obj,
1455 struct cl_page *page, pgoff_t index)
1457 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_page_init, env, obj, page,
1462 * Implements cl_object_operations::clo_io_init() method for lov
1463 * layer. Dispatches to the appropriate layout io initialization method.
1465 static int lov_io_init(const struct lu_env *env, struct cl_object *obj,
1468 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_preserved);
1470 CDEBUG(D_INODE, DFID "io %p type %d ignore/verify layout %d/%d\n",
1471 PFID(lu_object_fid(&obj->co_lu)), io, io->ci_type,
1472 io->ci_ignore_layout, io->ci_verify_layout);
1474 /* IO type CIT_MISC with ci_ignore_layout set are usually invoked from
1475 * the OSC layer. It shouldn't take lov layout conf lock in that case,
1476 * because as long as the OSC object exists, the layout can't be
1478 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
1479 !(io->ci_ignore_layout && io->ci_type == CIT_MISC),
1484 * An implementation of cl_object_operations::clo_attr_get() method for lov
1485 * layer. For raid0 layout this collects and merges attributes of all
1488 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
1489 struct cl_attr *attr)
1491 /* do not take lock, as this function is called under a
1492 * spin-lock. Layout is protected from changing by ongoing IO. */
1493 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
1496 static int lov_attr_update(const struct lu_env *env, struct cl_object *obj,
1497 const struct cl_attr *attr, unsigned valid)
1500 * No dispatch is required here, as no layout implements this.
1505 static int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
1506 struct cl_lock *lock, const struct cl_io *io)
1508 /* No need to lock because we've taken one refcount of layout. */
1509 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
1514 * We calculate on which OST the mapping will end. If the length of mapping
1515 * is greater than (stripe_size * stripe_count) then the last_stripe will
1516 * will be one just before start_stripe. Else we check if the mapping
1517 * intersects each OST and find last_stripe.
1518 * This function returns the last_stripe and also sets the stripe_count
1519 * over which the mapping is spread
1521 * \param lsm [in] striping information for the file
1522 * \param index [in] stripe component index
1523 * \param ext [in] logical extent of mapping
1524 * \param start_stripe [in] starting stripe of the mapping
1525 * \param stripe_count [out] the number of stripes across which to map is
1528 * \retval last_stripe return the last stripe of the mapping
1530 static int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, int index,
1531 struct lu_extent *ext,
1532 int start_stripe, int *stripe_count)
1534 struct lov_stripe_md_entry *lsme = lsm->lsm_entries[index];
1539 init_stripe = lov_stripe_number(lsm, index, ext->e_start);
1541 if (ext->e_end - ext->e_start >
1542 lsme->lsme_stripe_size * lsme->lsme_stripe_count) {
1543 if (init_stripe == start_stripe) {
1544 last_stripe = (start_stripe < 1) ?
1545 lsme->lsme_stripe_count - 1 : start_stripe - 1;
1546 *stripe_count = lsme->lsme_stripe_count;
1547 } else if (init_stripe < start_stripe) {
1548 last_stripe = (init_stripe < 1) ?
1549 lsme->lsme_stripe_count - 1 : init_stripe - 1;
1550 *stripe_count = lsme->lsme_stripe_count -
1551 (start_stripe - init_stripe);
1553 last_stripe = init_stripe - 1;
1554 *stripe_count = init_stripe - start_stripe;
1557 for (j = 0, i = start_stripe; j < lsme->lsme_stripe_count;
1558 i = (i + 1) % lsme->lsme_stripe_count, j++) {
1559 if (!lov_stripe_intersects(lsm, index, i, ext, NULL,
1562 if ((start_stripe != init_stripe) && (i == init_stripe))
1566 last_stripe = (start_stripe + j - 1) % lsme->lsme_stripe_count;
1573 * Set fe_device and copy extents from local buffer into main return buffer.
1575 * \param fiemap [out] fiemap to hold all extents
1576 * \param lcl_fm_ext [in] array of fiemap extents get from OSC layer
1577 * \param ost_index [in] OST index to be written into the fm_device
1578 * field for each extent
1579 * \param ext_count [in] number of extents to be copied
1580 * \param current_extent [in] where to start copying in the extent array
1582 static void fiemap_prepare_and_copy_exts(struct fiemap *fiemap,
1583 struct fiemap_extent *lcl_fm_ext,
1584 int ost_index, unsigned int ext_count,
1585 int current_extent, int abs_stripeno)
1590 for (ext = 0; ext < ext_count; ext++) {
1591 set_fe_device_stripenr(&lcl_fm_ext[ext], ost_index,
1593 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
1596 /* Copy fm_extent's from fm_local to return buffer */
1597 to = (char *)fiemap + fiemap_count_to_size(current_extent);
1598 memcpy(to, lcl_fm_ext, ext_count * sizeof(struct fiemap_extent));
1601 #define FIEMAP_BUFFER_SIZE 4096
1604 * Non-zero fe_logical indicates that this is a continuation FIEMAP
1605 * call. The local end offset and the device are sent in the first
1606 * fm_extent. This function calculates the stripe number from the index.
1607 * This function returns a stripe_no on which mapping is to be restarted.
1609 * This function returns fm_end_offset which is the in-OST offset at which
1610 * mapping should be restarted. If fm_end_offset=0 is returned then caller
1611 * will re-calculate proper offset in next stripe.
1612 * Note that the first extent is passed to lov_get_info via the value field.
1614 * \param fiemap [in] fiemap request header
1615 * \param lsm [in] striping information for the file
1616 * \param index [in] stripe component index
1617 * \param ext [in] logical extent of mapping
1618 * \param start_stripe [out] starting stripe will be returned in this
1620 static u64 fiemap_calc_fm_end_offset(struct fiemap *fiemap,
1621 struct lov_stripe_md *lsm,
1622 int index, struct lu_extent *ext,
1625 struct lov_stripe_md_entry *lsme = lsm->lsm_entries[index];
1626 u64 local_end = fiemap->fm_extents[0].fe_logical;
1631 if (fiemap->fm_extent_count == 0 ||
1632 fiemap->fm_extents[0].fe_logical == 0)
1635 stripe_no = *start_stripe;
1637 if (stripe_no == -1)
1640 /* If we have finished mapping on previous device, shift logical
1641 * offset to start of next device */
1642 if (lov_stripe_intersects(lsm, index, stripe_no, ext, NULL, &lun_end) &&
1643 local_end < lun_end) {
1644 fm_end_offset = local_end;
1646 /* This is a special value to indicate that caller should
1647 * calculate offset in next stripe. */
1649 *start_stripe = (stripe_no + 1) % lsme->lsme_stripe_count;
1652 return fm_end_offset;
1655 struct fiemap_state {
1656 struct fiemap *fs_fm;
1657 struct lu_extent fs_ext; /* current entry extent */
1659 u64 fs_end_offset; /* last iteration offset */
1660 int fs_cur_extent; /* collected exts so far */
1661 int fs_cnt_need; /* # of extents buf can hold */
1662 int fs_start_stripe;
1664 bool fs_device_done; /* enough for this OST */
1665 bool fs_finish_stripe; /* reached fs_last_stripe */
1666 bool fs_enough; /* enough for this call */
1669 static struct cl_object *lov_find_subobj(const struct lu_env *env,
1670 struct lov_object *lov,
1671 struct lov_stripe_md *lsm,
1674 struct lov_device *dev = lu2lov_dev(lov2lu(lov)->lo_dev);
1675 struct lov_thread_info *lti = lov_env_info(env);
1676 struct lu_fid *ofid = <i->lti_fid;
1677 struct lov_oinfo *oinfo;
1678 struct cl_device *subdev;
1679 int entry = lov_comp_entry(index);
1680 int stripe = lov_comp_stripe(index);
1683 struct cl_object *result;
1685 if (lov->lo_type != LLT_COMP)
1686 GOTO(out, result = NULL);
1688 if (entry >= lsm->lsm_entry_count ||
1689 stripe >= lsm->lsm_entries[entry]->lsme_stripe_count)
1690 GOTO(out, result = NULL);
1692 oinfo = lsm->lsm_entries[entry]->lsme_oinfo[stripe];
1693 ost_idx = oinfo->loi_ost_idx;
1694 rc = ostid_to_fid(ofid, &oinfo->loi_oi, ost_idx);
1696 GOTO(out, result = NULL);
1698 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
1699 result = lov_sub_find(env, subdev, ofid, NULL);
1702 result = ERR_PTR(-EINVAL);
1706 static int fiemap_for_stripe(const struct lu_env *env, struct cl_object *obj,
1707 struct lov_stripe_md *lsm, struct fiemap *fiemap,
1708 size_t *buflen, struct ll_fiemap_info_key *fmkey,
1709 int index, int stripe_last, int stripeno,
1710 struct fiemap_state *fs)
1712 struct lov_stripe_md_entry *lsme = lsm->lsm_entries[index];
1713 struct cl_object *subobj;
1714 struct lov_obd *lov = lu2lov_dev(obj->co_lu.lo_dev)->ld_lov;
1715 struct fiemap_extent *fm_ext = &fs->fs_fm->fm_extents[0];
1716 u64 req_fm_len; /* max requested extent coverage */
1717 u64 len_mapped_single_call;
1720 unsigned int ext_count;
1721 /* EOF for object */
1722 bool ost_eof = false;
1723 /* done with required mapping for this OST? */
1724 bool ost_done = false;
1728 fs->fs_device_done = false;
1729 /* Find out range of mapping on this stripe */
1730 if ((lov_stripe_intersects(lsm, index, stripeno, &fs->fs_ext,
1731 &obd_start, &obd_end)) == 0)
1734 if (lov_oinfo_is_dummy(lsme->lsme_oinfo[stripeno]))
1737 /* If this is a continuation FIEMAP call and we are on
1738 * starting stripe then obd_start needs to be set to
1740 if (fs->fs_end_offset != 0 && stripeno == fs->fs_start_stripe)
1741 obd_start = fs->fs_end_offset;
1743 if (lov_size_to_stripe(lsm, index, fs->fs_ext.e_end, stripeno) ==
1747 req_fm_len = obd_end - obd_start + 1;
1748 fs->fs_fm->fm_length = 0;
1749 len_mapped_single_call = 0;
1751 /* find lobsub object */
1752 subobj = lov_find_subobj(env, cl2lov(obj), lsm,
1753 lov_comp_index(index, stripeno));
1755 return PTR_ERR(subobj);
1756 /* If the output buffer is very large and the objects have many
1757 * extents we may need to loop on a single OST repeatedly */
1759 if (fiemap->fm_extent_count > 0) {
1760 /* Don't get too many extents. */
1761 if (fs->fs_cur_extent + fs->fs_cnt_need >
1762 fiemap->fm_extent_count)
1763 fs->fs_cnt_need = fiemap->fm_extent_count -
1767 obd_start += len_mapped_single_call;
1768 fs->fs_fm->fm_length = req_fm_len - len_mapped_single_call;
1769 req_fm_len = fs->fs_fm->fm_length;
1771 * If we've collected enough extent map, we'd request 1 more,
1772 * to see whether we coincidentally finished all available
1773 * extent map, so that FIEMAP_EXTENT_LAST would be set.
1775 fs->fs_fm->fm_extent_count = fs->fs_enough ?
1776 1 : fs->fs_cnt_need;
1777 fs->fs_fm->fm_mapped_extents = 0;
1778 fs->fs_fm->fm_flags = fiemap->fm_flags;
1780 ost_index = lsme->lsme_oinfo[stripeno]->loi_ost_idx;
1782 if (ost_index < 0 || ost_index >= lov->desc.ld_tgt_count)
1783 GOTO(obj_put, rc = -EINVAL);
1784 /* If OST is inactive, return extent with UNKNOWN flag. */
1785 if (!lov->lov_tgts[ost_index]->ltd_active) {
1786 fs->fs_fm->fm_flags |= FIEMAP_EXTENT_LAST;
1787 fs->fs_fm->fm_mapped_extents = 1;
1789 fm_ext[0].fe_logical = obd_start;
1790 fm_ext[0].fe_length = obd_end - obd_start + 1;
1791 fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
1796 fs->fs_fm->fm_start = obd_start;
1797 fs->fs_fm->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
1798 memcpy(&fmkey->lfik_fiemap, fs->fs_fm, sizeof(*fs->fs_fm));
1799 *buflen = fiemap_count_to_size(fs->fs_fm->fm_extent_count);
1801 rc = cl_object_fiemap(env, subobj, fmkey, fs->fs_fm, buflen);
1805 ext_count = fs->fs_fm->fm_mapped_extents;
1806 if (ext_count == 0) {
1808 fs->fs_device_done = true;
1809 /* If last stripe has hold at the end,
1810 * we need to return */
1811 if (stripeno == fs->fs_last_stripe) {
1812 fiemap->fm_mapped_extents = 0;
1813 fs->fs_finish_stripe = true;
1817 } else if (fs->fs_enough) {
1819 * We've collected enough extents and there are
1820 * more extents after it.
1825 /* If we just need num of extents, got to next device */
1826 if (fiemap->fm_extent_count == 0) {
1827 fs->fs_cur_extent += ext_count;
1831 /* prepare to copy retrived map extents */
1832 len_mapped_single_call = fm_ext[ext_count - 1].fe_logical +
1833 fm_ext[ext_count - 1].fe_length -
1836 /* Have we finished mapping on this device? */
1837 if (req_fm_len <= len_mapped_single_call) {
1839 fs->fs_device_done = true;
1842 /* Clear the EXTENT_LAST flag which can be present on
1843 * the last extent */
1844 if (fm_ext[ext_count - 1].fe_flags & FIEMAP_EXTENT_LAST)
1845 fm_ext[ext_count - 1].fe_flags &= ~FIEMAP_EXTENT_LAST;
1846 if (lov_stripe_size(lsm, index,
1847 fm_ext[ext_count - 1].fe_logical +
1848 fm_ext[ext_count - 1].fe_length,
1849 stripeno) >= fmkey->lfik_oa.o_size) {
1851 fs->fs_device_done = true;
1854 fiemap_prepare_and_copy_exts(fiemap, fm_ext, ost_index,
1855 ext_count, fs->fs_cur_extent,
1856 stripe_last + stripeno);
1857 fs->fs_cur_extent += ext_count;
1859 /* Ran out of available extents? */
1860 if (fs->fs_cur_extent >= fiemap->fm_extent_count)
1861 fs->fs_enough = true;
1862 } while (!ost_done && !ost_eof);
1864 if (stripeno == fs->fs_last_stripe)
1865 fs->fs_finish_stripe = true;
1867 cl_object_put(env, subobj);
1873 * Break down the FIEMAP request and send appropriate calls to individual OSTs.
1874 * This also handles the restarting of FIEMAP calls in case mapping overflows
1875 * the available number of extents in single call.
1877 * \param env [in] lustre environment
1878 * \param obj [in] file object
1879 * \param fmkey [in] fiemap request header and other info
1880 * \param fiemap [out] fiemap buffer holding retrived map extents
1881 * \param buflen [in/out] max buffer length of @fiemap, when iterate
1882 * each OST, it is used to limit max map needed
1886 static int lov_object_fiemap(const struct lu_env *env, struct cl_object *obj,
1887 struct ll_fiemap_info_key *fmkey,
1888 struct fiemap *fiemap, size_t *buflen)
1890 struct lov_stripe_md_entry *lsme;
1891 struct lov_stripe_md *lsm;
1892 struct fiemap *fm_local = NULL;
1896 int start_entry = -1;
1900 unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
1902 struct fiemap_state fs = { 0 };
1903 struct lu_extent range;
1906 int start_stripe = 0;
1907 bool resume = false;
1910 lsm = lov_lsm_addref(cl2lov(obj));
1912 /* no extent: there is no object for mapping */
1913 fiemap->fm_mapped_extents = 0;
1917 if (!(fiemap->fm_flags & FIEMAP_FLAG_DEVICE_ORDER)) {
1919 * If the entry count > 1 or stripe_count > 1 and the
1920 * application does not understand DEVICE_ORDER flag,
1921 * it cannot interpret the extents correctly.
1923 if (lsm->lsm_entry_count > 1 ||
1924 (lsm->lsm_entry_count == 1 &&
1925 lsm->lsm_entries[0]->lsme_stripe_count > 1))
1926 GOTO(out_lsm, rc = -ENOTSUPP);
1929 /* No support for DOM layout yet. */
1930 if (lsme_is_dom(lsm->lsm_entries[0]))
1931 GOTO(out_lsm, rc = -ENOTSUPP);
1933 if (lsm->lsm_is_released) {
1934 if (fiemap->fm_start < fmkey->lfik_oa.o_size) {
1936 * released file, return a minimal FIEMAP if
1937 * request fits in file-size.
1939 fiemap->fm_mapped_extents = 1;
1940 fiemap->fm_extents[0].fe_logical = fiemap->fm_start;
1941 if (fiemap->fm_start + fiemap->fm_length <
1942 fmkey->lfik_oa.o_size)
1943 fiemap->fm_extents[0].fe_length =
1946 fiemap->fm_extents[0].fe_length =
1947 fmkey->lfik_oa.o_size -
1949 fiemap->fm_extents[0].fe_flags |=
1950 FIEMAP_EXTENT_UNKNOWN | FIEMAP_EXTENT_LAST;
1952 GOTO(out_lsm, rc = 0);
1955 /* buffer_size is small to hold fm_extent_count of extents. */
1956 if (fiemap_count_to_size(fiemap->fm_extent_count) < buffer_size)
1957 buffer_size = fiemap_count_to_size(fiemap->fm_extent_count);
1959 OBD_ALLOC_LARGE(fm_local, buffer_size);
1960 if (fm_local == NULL)
1961 GOTO(out_lsm, rc = -ENOMEM);
1964 * Requested extent count exceeds the fiemap buffer size, shrink our
1967 if (fiemap_count_to_size(fiemap->fm_extent_count) > *buflen)
1968 fiemap->fm_extent_count = fiemap_size_to_count(*buflen);
1970 fs.fs_enough = false;
1971 fs.fs_cur_extent = 0;
1972 fs.fs_fm = fm_local;
1973 fs.fs_cnt_need = fiemap_size_to_count(buffer_size);
1975 whole_start = fiemap->fm_start;
1976 /* whole_start is beyond the end of the file */
1977 if (whole_start > fmkey->lfik_oa.o_size)
1978 GOTO(out_fm_local, rc = -EINVAL);
1979 whole_end = (fiemap->fm_length == OBD_OBJECT_EOF) ?
1980 fmkey->lfik_oa.o_size + 1 :
1981 whole_start + fiemap->fm_length;
1983 * If fiemap->fm_length != OBD_OBJECT_EOF but whole_end exceeds file
1986 if (whole_end > fmkey->lfik_oa.o_size + 1)
1987 whole_end = fmkey->lfik_oa.o_size + 1;
1990 * the high 16bits of fe_device remember which stripe the last
1991 * call has been arrived, we'd continue from there in this call.
1993 if (fiemap->fm_extent_count && fiemap->fm_extents[0].fe_logical)
1995 stripe_last = get_fe_stripenr(&fiemap->fm_extents[0]);
1997 * stripe_last records stripe number we've been processed in the last
2000 end_entry = lsm->lsm_entry_count - 1;
2002 for (entry = 0; entry <= end_entry; entry++) {
2003 lsme = lsm->lsm_entries[entry];
2004 if (cur_stripe + lsme->lsme_stripe_count >= stripe_last) {
2005 start_entry = entry;
2006 start_stripe = stripe_last - cur_stripe;
2010 cur_stripe += lsme->lsme_stripe_count;
2012 if (start_entry == -1) {
2013 CERROR(DFID": FIEMAP does not init start entry, cur_stripe=%d, "
2014 "stripe_last=%d\n", PFID(lu_object_fid(&obj->co_lu)),
2015 cur_stripe, stripe_last);
2016 GOTO(out_fm_local, rc = -EINVAL);
2019 * @start_entry & @start_stripe records the position of fiemap
2020 * resumption @stripe_last keeps recording the absolution position
2021 * we'are processing. @resume indicates we'd honor @start_stripe.
2024 range.e_start = whole_start;
2025 range.e_end = whole_end;
2027 for (entry = start_entry; entry <= end_entry; entry++) {
2028 /* remeber to update stripe_last accordingly */
2029 lsme = lsm->lsm_entries[entry];
2031 /* FLR could contain component holes between entries */
2032 if (!lsme_inited(lsme)) {
2033 stripe_last += lsme->lsme_stripe_count;
2038 if (!lu_extent_is_overlapped(&range, &lsme->lsme_extent)) {
2039 stripe_last += lsme->lsme_stripe_count;
2044 /* prepare for a component entry iteration */
2045 if (lsme->lsme_extent.e_start > whole_start)
2046 fs.fs_ext.e_start = lsme->lsme_extent.e_start;
2048 fs.fs_ext.e_start = whole_start;
2049 if (lsme->lsme_extent.e_end > whole_end)
2050 fs.fs_ext.e_end = whole_end;
2052 fs.fs_ext.e_end = lsme->lsme_extent.e_end;
2054 /* Calculate start stripe, last stripe and length of mapping */
2056 fs.fs_start_stripe = start_stripe;
2057 /* put stripe_last to the first stripe of the comp */
2058 stripe_last -= start_stripe;
2061 fs.fs_start_stripe = lov_stripe_number(lsm, entry,
2064 fs.fs_last_stripe = fiemap_calc_last_stripe(lsm, entry,
2065 &fs.fs_ext, fs.fs_start_stripe,
2068 * A new mirror component is under process, reset
2069 * fs.fs_end_offset and then fiemap_for_stripe() starts from
2070 * the overlapping extent, otherwise starts from
2073 if (entry > start_entry && lsme->lsme_extent.e_start == 0) {
2075 fs.fs_end_offset = 0;
2077 fs.fs_end_offset = fiemap_calc_fm_end_offset(fiemap,
2078 lsm, entry, &fs.fs_ext,
2079 &fs.fs_start_stripe);
2082 /* Check each stripe */
2083 for (cur_stripe = fs.fs_start_stripe; stripe_count > 0;
2085 cur_stripe = (cur_stripe + 1) % lsme->lsme_stripe_count) {
2086 /* reset fs_finish_stripe */
2087 fs.fs_finish_stripe = false;
2088 rc = fiemap_for_stripe(env, obj, lsm, fiemap, buflen,
2089 fmkey, entry, stripe_last,
2092 GOTO(out_fm_local, rc);
2094 stripe_last += cur_stripe;
2097 if (fs.fs_finish_stripe)
2099 } /* for each stripe */
2100 stripe_last += lsme->lsme_stripe_count;
2101 } /* for covering layout component entry */
2104 if (fs.fs_cur_extent > 0)
2105 cur_ext = fs.fs_cur_extent - 1;
2109 /* done all the processing */
2110 if (entry > end_entry)
2111 fiemap->fm_extents[cur_ext].fe_flags |= FIEMAP_EXTENT_LAST;
2113 /* Indicate that we are returning device offsets unless file just has
2115 if (lsm->lsm_entry_count > 1 ||
2116 (lsm->lsm_entry_count == 1 &&
2117 lsm->lsm_entries[0]->lsme_stripe_count > 1))
2118 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
2120 if (fiemap->fm_extent_count == 0)
2121 goto skip_last_device_calc;
2123 skip_last_device_calc:
2124 fiemap->fm_mapped_extents = fs.fs_cur_extent;
2126 OBD_FREE_LARGE(fm_local, buffer_size);
2133 static int lov_object_getstripe(const struct lu_env *env, struct cl_object *obj,
2134 struct lov_user_md __user *lum, size_t size)
2136 struct lov_object *lov = cl2lov(obj);
2137 struct lov_stripe_md *lsm;
2141 lsm = lov_lsm_addref(lov);
2145 rc = lov_getstripe(env, cl2lov(obj), lsm, lum, size);
2150 static int lov_object_layout_get(const struct lu_env *env,
2151 struct cl_object *obj,
2152 struct cl_layout *cl)
2154 struct lov_object *lov = cl2lov(obj);
2155 struct lov_stripe_md *lsm = lov_lsm_addref(lov);
2156 struct lu_buf *buf = &cl->cl_buf;
2162 cl->cl_layout_gen = CL_LAYOUT_GEN_EMPTY;
2167 cl->cl_size = lov_comp_md_size(lsm);
2168 cl->cl_layout_gen = lsm->lsm_layout_gen;
2169 cl->cl_is_released = lsm->lsm_is_released;
2170 cl->cl_is_composite = lsm_is_composite(lsm->lsm_magic);
2172 rc = lov_lsm_pack(lsm, buf->lb_buf, buf->lb_len);
2175 /* return error or number of bytes */
2179 static loff_t lov_object_maxbytes(struct cl_object *obj)
2181 struct lov_object *lov = cl2lov(obj);
2182 struct lov_stripe_md *lsm = lov_lsm_addref(lov);
2188 maxbytes = lsm->lsm_maxbytes;
2195 static int lov_object_flush(const struct lu_env *env, struct cl_object *obj,
2196 struct ldlm_lock *lock)
2198 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_flush, true, env, obj,
2202 static const struct cl_object_operations lov_ops = {
2203 .coo_page_init = lov_page_init,
2204 .coo_lock_init = lov_lock_init,
2205 .coo_io_init = lov_io_init,
2206 .coo_attr_get = lov_attr_get,
2207 .coo_attr_update = lov_attr_update,
2208 .coo_conf_set = lov_conf_set,
2209 .coo_getstripe = lov_object_getstripe,
2210 .coo_layout_get = lov_object_layout_get,
2211 .coo_maxbytes = lov_object_maxbytes,
2212 .coo_fiemap = lov_object_fiemap,
2213 .coo_object_flush = lov_object_flush
2216 static const struct lu_object_operations lov_lu_obj_ops = {
2217 .loo_object_init = lov_object_init,
2218 .loo_object_delete = lov_object_delete,
2219 .loo_object_release = NULL,
2220 .loo_object_free = lov_object_free,
2221 .loo_object_print = lov_object_print,
2222 .loo_object_invariant = NULL,
2225 struct lu_object *lov_object_alloc(const struct lu_env *env,
2226 const struct lu_object_header *unused,
2227 struct lu_device *dev)
2229 struct lov_object *lov;
2230 struct lu_object *obj;
2233 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, GFP_NOFS);
2236 lu_object_init(obj, NULL, dev);
2237 lov->lo_cl.co_ops = &lov_ops;
2238 lov->lo_type = -1; /* invalid, to catch uninitialized type */
2240 * object io operation vector (cl_object::co_iop) is installed
2241 * later in lov_object_init(), as different vectors are used
2242 * for object with different layouts.
2244 obj->lo_ops = &lov_lu_obj_ops;
2250 static struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
2252 struct lov_stripe_md *lsm = NULL;
2254 lov_conf_freeze(lov);
2255 if (lov->lo_lsm != NULL) {
2256 lsm = lsm_addref(lov->lo_lsm);
2257 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
2258 lsm, atomic_read(&lsm->lsm_refc),
2259 test_bit(LO_LAYOUT_INVALID, &lov->lo_obj_flags),
2266 int lov_read_and_clear_async_rc(struct cl_object *clob)
2268 struct lu_object *luobj;
2272 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
2274 if (luobj != NULL) {
2275 struct lov_object *lov = lu2lov(luobj);
2277 lov_conf_freeze(lov);
2278 switch (lov->lo_type) {
2280 struct lov_stripe_md *lsm;
2284 LASSERT(lsm != NULL);
2285 for (i = 0; i < lsm->lsm_entry_count; i++) {
2286 struct lov_stripe_md_entry *lse =
2287 lsm->lsm_entries[i];
2290 if (!lsme_inited(lse))
2293 for (j = 0; j < lse->lsme_stripe_count; j++) {
2294 struct lov_oinfo *loi =
2297 if (lov_oinfo_is_dummy(loi))
2300 if (loi->loi_ar.ar_rc && !rc)
2301 rc = loi->loi_ar.ar_rc;
2302 loi->loi_ar.ar_rc = 0;
2318 EXPORT_SYMBOL(lov_read_and_clear_async_rc);