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, 2016, 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 "lov_cl_internal.h"
42 static inline struct lov_device *lov_object_dev(struct lov_object *obj)
44 return lu2lov_dev(obj->lo_cl.co_lu.lo_dev);
51 /*****************************************************************************
57 struct lov_layout_operations {
58 int (*llo_init)(const struct lu_env *env, struct lov_device *dev,
59 struct lov_object *lov, struct lov_stripe_md *lsm,
60 const struct cl_object_conf *conf,
61 union lov_layout_state *state);
62 int (*llo_delete)(const struct lu_env *env, struct lov_object *lov,
63 union lov_layout_state *state);
64 void (*llo_fini)(const struct lu_env *env, struct lov_object *lov,
65 union lov_layout_state *state);
66 int (*llo_print)(const struct lu_env *env, void *cookie,
67 lu_printer_t p, const struct lu_object *o);
68 int (*llo_page_init)(const struct lu_env *env, struct cl_object *obj,
69 struct cl_page *page, pgoff_t index);
70 int (*llo_lock_init)(const struct lu_env *env,
71 struct cl_object *obj, struct cl_lock *lock,
72 const struct cl_io *io);
73 int (*llo_io_init)(const struct lu_env *env,
74 struct cl_object *obj, struct cl_io *io);
75 int (*llo_getattr)(const struct lu_env *env, struct cl_object *obj,
76 struct cl_attr *attr);
79 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov);
81 static void lov_lsm_put(struct lov_stripe_md *lsm)
87 /*****************************************************************************
89 * Lov object layout operations.
93 static struct cl_object *lov_sub_find(const struct lu_env *env,
94 struct cl_device *dev,
95 const struct lu_fid *fid,
96 const struct cl_object_conf *conf)
102 o = lu_object_find_at(env, cl2lu_dev(dev), fid, &conf->coc_lu);
103 LASSERT(ergo(!IS_ERR(o), o->lo_dev->ld_type == &lovsub_device_type));
107 static int lov_page_slice_fixup(struct lov_object *lov,
108 struct cl_object *stripe)
110 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
114 return hdr->coh_page_bufsize - lov->lo_cl.co_slice_off -
115 cfs_size_round(sizeof(struct lov_page));
117 cl_object_for_each(o, stripe)
118 o->co_slice_off += hdr->coh_page_bufsize;
120 return cl_object_header(stripe)->coh_page_bufsize;
123 static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
124 struct cl_object *subobj, struct lov_oinfo *oinfo,
127 struct cl_object_header *hdr;
128 struct cl_object_header *subhdr;
129 struct cl_object_header *parent;
130 int entry = lov_comp_entry(idx);
131 int stripe = lov_comp_stripe(idx);
134 if (OBD_FAIL_CHECK(OBD_FAIL_LOV_INIT)) {
135 /* For sanity:test_206.
136 * Do not leave the object in cache to avoid accessing
137 * freed memory. This is because osc_object is referring to
138 * lov_oinfo of lsm_stripe_data which will be freed due to
140 cl_object_kill(env, subobj);
141 cl_object_put(env, subobj);
145 hdr = cl_object_header(lov2cl(lov));
146 subhdr = cl_object_header(subobj);
148 CDEBUG(D_INODE, DFID"@%p[%d:%d] -> "DFID"@%p: ostid: "DOSTID
149 " ost idx: %d gen: %d\n",
150 PFID(lu_object_fid(&subobj->co_lu)), subhdr, entry, stripe,
151 PFID(lu_object_fid(lov2lu(lov))), hdr, POSTID(&oinfo->loi_oi),
152 oinfo->loi_ost_idx, oinfo->loi_ost_gen);
154 /* reuse ->coh_attr_guard to protect coh_parent change */
155 spin_lock(&subhdr->coh_attr_guard);
156 parent = subhdr->coh_parent;
157 if (parent == NULL) {
158 struct lovsub_object *lso = cl2lovsub(subobj);
160 subhdr->coh_parent = hdr;
161 spin_unlock(&subhdr->coh_attr_guard);
162 subhdr->coh_nesting = hdr->coh_nesting + 1;
163 lu_object_ref_add(&subobj->co_lu, "lov-parent", lov);
164 lso->lso_super = lov;
165 lso->lso_index = idx;
168 struct lu_object *old_obj;
169 struct lov_object *old_lov;
170 unsigned int mask = D_INODE;
172 spin_unlock(&subhdr->coh_attr_guard);
173 old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
174 LASSERT(old_obj != NULL);
175 old_lov = cl2lov(lu2cl(old_obj));
176 if (old_lov->lo_layout_invalid) {
177 /* the object's layout has already changed but isn't
179 lu_object_unhash(env, &subobj->co_lu);
186 LU_OBJECT_DEBUG(mask, env, &subobj->co_lu,
187 "stripe %d is already owned.", idx);
188 LU_OBJECT_DEBUG(mask, env, old_obj, "owned.");
189 LU_OBJECT_HEADER(mask, env, lov2lu(lov), "try to own.\n");
190 cl_object_put(env, subobj);
195 static int lov_init_raid0(const struct lu_env *env, struct lov_device *dev,
196 struct lov_object *lov, unsigned int index,
197 const struct cl_object_conf *conf,
198 struct lov_layout_entry *lle)
200 struct lov_layout_raid0 *r0 = &lle->lle_raid0;
201 struct lov_thread_info *lti = lov_env_info(env);
202 struct cl_object_conf *subconf = <i->lti_stripe_conf;
203 struct lu_fid *ofid = <i->lti_fid;
204 struct cl_object *stripe;
205 struct lov_stripe_md_entry *lse = lov_lse(lov, index);
212 spin_lock_init(&r0->lo_sub_lock);
213 r0->lo_nr = lse->lsme_stripe_count;
214 LASSERT(r0->lo_nr <= lov_targets_nr(dev));
216 OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
217 if (r0->lo_sub == NULL)
218 GOTO(out, result = -ENOMEM);
222 memset(subconf, 0, sizeof(*subconf));
225 * Create stripe cl_objects.
227 for (i = 0; i < r0->lo_nr; ++i) {
228 struct cl_device *subdev;
229 struct lov_oinfo *oinfo = lse->lsme_oinfo[i];
230 int ost_idx = oinfo->loi_ost_idx;
232 if (lov_oinfo_is_dummy(oinfo))
235 result = ostid_to_fid(ofid, &oinfo->loi_oi, oinfo->loi_ost_idx);
239 if (dev->ld_target[ost_idx] == NULL) {
240 CERROR("%s: OST %04x is not initialized\n",
241 lov2obd(dev->ld_lov)->obd_name, ost_idx);
242 GOTO(out, result = -EIO);
245 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
246 subconf->u.coc_oinfo = oinfo;
247 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
248 /* In the function below, .hs_keycmp resolves to
249 * lu_obj_hop_keycmp() */
250 /* coverity[overrun-buffer-val] */
251 stripe = lov_sub_find(env, subdev, ofid, subconf);
253 GOTO(out, result = PTR_ERR(stripe));
255 result = lov_init_sub(env, lov, stripe, oinfo,
256 lov_comp_index(index, i));
257 if (result == -EAGAIN) { /* try again */
264 r0->lo_sub[i] = cl2lovsub(stripe);
266 sz = lov_page_slice_fixup(lov, stripe);
267 LASSERT(ergo(psz > 0, psz == sz));
277 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
278 struct lov_layout_raid0 *r0,
279 struct lovsub_object *los, int idx)
281 struct cl_object *sub;
282 struct lu_site *site;
283 struct lu_site_bkt_data *bkt;
284 wait_queue_t *waiter;
286 LASSERT(r0->lo_sub[idx] == los);
288 sub = lovsub2cl(los);
289 site = sub->co_lu.lo_dev->ld_site;
290 bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
292 cl_object_kill(env, sub);
293 /* release a reference to the sub-object and ... */
294 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
295 cl_object_put(env, sub);
297 /* ... wait until it is actually destroyed---sub-object clears its
298 * ->lo_sub[] slot in lovsub_object_free() */
299 if (r0->lo_sub[idx] == los) {
300 waiter = &lov_env_info(env)->lti_waiter;
301 init_waitqueue_entry(waiter, current);
302 add_wait_queue(&bkt->lsb_marche_funebre, waiter);
303 set_current_state(TASK_UNINTERRUPTIBLE);
305 /* this wait-queue is signaled at the end of
306 * lu_object_free(). */
307 set_current_state(TASK_UNINTERRUPTIBLE);
308 spin_lock(&r0->lo_sub_lock);
309 if (r0->lo_sub[idx] == los) {
310 spin_unlock(&r0->lo_sub_lock);
313 spin_unlock(&r0->lo_sub_lock);
314 set_current_state(TASK_RUNNING);
318 remove_wait_queue(&bkt->lsb_marche_funebre, waiter);
320 LASSERT(r0->lo_sub[idx] == NULL);
323 static void lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
324 struct lov_layout_entry *lle)
326 struct lov_layout_raid0 *r0 = &lle->lle_raid0;
330 if (r0->lo_sub != NULL) {
333 for (i = 0; i < r0->lo_nr; ++i) {
334 struct lovsub_object *los = r0->lo_sub[i];
337 cl_object_prune(env, &los->lso_cl);
339 * If top-level object is to be evicted from
340 * the cache, so are its sub-objects.
342 lov_subobject_kill(env, lov, r0, los, i);
350 static void lov_fini_raid0(const struct lu_env *env,
351 struct lov_layout_entry *lle)
353 struct lov_layout_raid0 *r0 = &lle->lle_raid0;
355 if (r0->lo_sub != NULL) {
356 OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
361 static int lov_print_raid0(const struct lu_env *env, void *cookie,
362 lu_printer_t p, const struct lov_layout_entry *lle)
364 const struct lov_layout_raid0 *r0 = &lle->lle_raid0;
367 for (i = 0; i < r0->lo_nr; ++i) {
368 struct lu_object *sub;
370 if (r0->lo_sub[i] != NULL) {
371 sub = lovsub2lu(r0->lo_sub[i]);
372 lu_object_print(env, cookie, p, sub);
374 (*p)(env, cookie, "sub %d absent\n", i);
380 static int lov_attr_get_raid0(const struct lu_env *env, struct lov_object *lov,
381 unsigned int index, struct lov_layout_entry *lle,
382 struct cl_attr **lov_attr)
384 struct lov_layout_raid0 *r0 = &lle->lle_raid0;
385 struct lov_stripe_md *lsm = lov->lo_lsm;
386 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
387 struct cl_attr *attr = &r0->lo_attr;
391 if (r0->lo_attr_valid) {
396 memset(lvb, 0, sizeof(*lvb));
398 /* XXX: timestamps can be negative by sanity:test_39m,
400 lvb->lvb_atime = LLONG_MIN;
401 lvb->lvb_ctime = LLONG_MIN;
402 lvb->lvb_mtime = LLONG_MIN;
405 * XXX that should be replaced with a loop over sub-objects,
406 * doing cl_object_attr_get() on them. But for now, let's
407 * reuse old lov code.
411 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
412 * happy. It's not needed, because new code uses
413 * ->coh_attr_guard spin-lock to protect consistency of
414 * sub-object attributes.
416 lov_stripe_lock(lsm);
417 result = lov_merge_lvb_kms(lsm, index, lvb, &kms);
418 lov_stripe_unlock(lsm);
420 cl_lvb2attr(attr, lvb);
422 r0->lo_attr_valid = 1;
429 static struct lov_comp_layout_entry_ops raid0_ops = {
430 .lco_init = lov_init_raid0,
431 .lco_fini = lov_fini_raid0,
432 .lco_getattr = lov_attr_get_raid0,
435 static int lov_attr_get_dom(const struct lu_env *env, struct lov_object *lov,
436 unsigned int index, struct lov_layout_entry *lle,
437 struct cl_attr **lov_attr)
439 struct lov_layout_dom *dom = &lle->lle_dom;
440 struct lov_oinfo *loi = dom->lo_loi;
441 struct cl_attr *attr = &dom->lo_dom_r0.lo_attr;
443 if (dom->lo_dom_r0.lo_attr_valid) {
448 if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks))
449 return OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
451 cl_lvb2attr(attr, &loi->loi_lvb);
453 /* DoM component size can be bigger than stripe size after
454 * client's setattr RPC, so do not count anything beyound
455 * component end. Alternatively, check that limit on server
456 * and do not allow size overflow there. */
457 if (attr->cat_size > lle->lle_extent.e_end)
458 attr->cat_size = lle->lle_extent.e_end;
460 attr->cat_kms = attr->cat_size;
462 dom->lo_dom_r0.lo_attr_valid = 1;
469 * Lookup FLD to get MDS index of the given DOM object FID.
471 * \param[in] ld LOV device
472 * \param[in] fid FID to lookup
473 * \param[out] nr index in MDC array to return back
475 * \retval 0 and \a mds filled with MDS index if successful
476 * \retval negative value on error
478 static int lov_fld_lookup(struct lov_device *ld, const struct lu_fid *fid,
486 rc = fld_client_lookup(&ld->ld_lmv->u.lmv.lmv_fld, fid_seq(fid),
487 &mds_idx, LU_SEQ_RANGE_MDT, NULL);
489 CERROR("%s: error while looking for mds number. Seq %#llx"
490 ", err = %d\n", lu_dev_name(cl2lu_dev(&ld->ld_cl)),
495 CDEBUG(D_INODE, "FLD lookup got mds #%x for fid="DFID"\n",
498 /* find proper MDC device in the array */
499 for (i = 0; i < ld->ld_md_tgts_nr; i++) {
500 if (ld->ld_md_tgts[i].ldm_mdc != NULL &&
501 ld->ld_md_tgts[i].ldm_idx == mds_idx)
505 if (i == ld->ld_md_tgts_nr) {
506 CERROR("%s: cannot find corresponding MDC device for mds #%x "
507 "for fid="DFID"\n", lu_dev_name(cl2lu_dev(&ld->ld_cl)),
517 * Implementation of lov_comp_layout_entry_ops::lco_init for DOM object.
519 * Init the DOM object for the first time. It prepares also RAID0 entry
520 * for it to use in common methods with ordinary RAID0 layout entries.
522 * \param[in] env execution environment
523 * \param[in] dev LOV device
524 * \param[in] lov LOV object
525 * \param[in] index Composite layout entry index in LSM
526 * \param[in] lle Composite LOV layout entry
528 static int lov_init_dom(const struct lu_env *env, struct lov_device *dev,
529 struct lov_object *lov, unsigned int index,
530 const struct cl_object_conf *conf,
531 struct lov_layout_entry *lle)
533 struct lov_thread_info *lti = lov_env_info(env);
534 struct lov_stripe_md_entry *lsme = lov_lse(lov, index);
535 struct cl_object *clo;
536 struct lu_object *o = lov2lu(lov);
537 const struct lu_fid *fid = lu_object_fid(o);
538 struct cl_device *mdcdev;
539 struct lov_oinfo *loi = NULL;
540 struct cl_object_conf *sconf = <i->lti_stripe_conf;
549 /* find proper MDS device */
550 rc = lov_fld_lookup(dev, fid, &idx);
554 LASSERTF(dev->ld_md_tgts[idx].ldm_mdc != NULL,
555 "LOV md target[%u] is NULL\n", idx);
557 /* check lsm is DOM, more checks are needed */
558 LASSERT(lsme->lsme_stripe_count == 0);
561 * Create lower cl_objects.
563 mdcdev = dev->ld_md_tgts[idx].ldm_mdc;
565 LASSERTF(mdcdev != NULL, "non-initialized mdc subdev\n");
567 /* DoM object has no oinfo in LSM entry, create it exclusively */
568 OBD_SLAB_ALLOC_PTR_GFP(loi, lov_oinfo_slab, GFP_NOFS);
572 fid_to_ostid(lu_object_fid(lov2lu(lov)), &loi->loi_oi);
574 sconf->u.coc_oinfo = loi;
576 clo = lov_sub_find(env, mdcdev, fid, sconf);
578 GOTO(out, rc = PTR_ERR(clo));
580 rc = lov_init_sub(env, lov, clo, loi, lov_comp_index(index, 0));
581 if (rc == -EAGAIN) /* try again */
586 lle->lle_dom.lo_dom = cl2lovsub(clo);
587 spin_lock_init(&lle->lle_dom.lo_dom_r0.lo_sub_lock);
588 lle->lle_dom.lo_dom_r0.lo_nr = 1;
589 lle->lle_dom.lo_dom_r0.lo_sub = &lle->lle_dom.lo_dom;
590 lle->lle_dom.lo_loi = loi;
592 rc = lov_page_slice_fixup(lov, clo);
597 OBD_SLAB_FREE_PTR(loi, lov_oinfo_slab);
602 * Implementation of lov_layout_operations::llo_fini for DOM object.
604 * Finish the DOM object and free related memory.
606 * \param[in] env execution environment
607 * \param[in] lov LOV object
608 * \param[in] state LOV layout state
610 static void lov_fini_dom(const struct lu_env *env,
611 struct lov_layout_entry *lle)
613 if (lle->lle_dom.lo_dom != NULL)
614 lle->lle_dom.lo_dom = NULL;
615 if (lle->lle_dom.lo_loi != NULL)
616 OBD_SLAB_FREE_PTR(lle->lle_dom.lo_loi, lov_oinfo_slab);
619 static struct lov_comp_layout_entry_ops dom_ops = {
620 .lco_init = lov_init_dom,
621 .lco_fini = lov_fini_dom,
622 .lco_getattr = lov_attr_get_dom,
625 static int lov_init_composite(const struct lu_env *env, struct lov_device *dev,
626 struct lov_object *lov, struct lov_stripe_md *lsm,
627 const struct cl_object_conf *conf,
628 union lov_layout_state *state)
630 struct lov_layout_composite *comp = &state->composite;
631 struct lov_layout_entry *lle;
632 unsigned int entry_count;
633 unsigned int psz = 0;
639 LASSERT(lsm->lsm_entry_count > 0);
640 LASSERT(lov->lo_lsm == NULL);
641 lov->lo_lsm = lsm_addref(lsm);
642 lov->lo_layout_invalid = true;
644 entry_count = lsm->lsm_entry_count;
645 comp->lo_entry_count = entry_count;
647 OBD_ALLOC(comp->lo_entries, entry_count * sizeof(*comp->lo_entries));
648 if (comp->lo_entries == NULL)
651 /* Initiate all entry types and extents data at first */
652 for (i = 0; i < entry_count; i++) {
653 lle = &comp->lo_entries[i];
655 lle->lle_type = lov_entry_type(lsm->lsm_entries[i]);
656 switch (lle->lle_type) {
657 case LOV_PATTERN_RAID0:
658 lle->lle_comp_ops = &raid0_ops;
660 case LOV_PATTERN_MDT:
661 lle->lle_comp_ops = &dom_ops;
664 CERROR("%s: unknown composite layout entry type %i\n",
665 lov2obd(dev->ld_lov)->obd_name,
666 lsm->lsm_entries[i]->lsme_pattern);
667 dump_lsm(D_ERROR, lsm);
670 lle->lle_extent = lsm->lsm_entries[i]->lsme_extent;
674 lov_foreach_layout_entry(lov, lle) {
676 * If the component has not been init-ed on MDS side, for
677 * PFL layout, we'd know that the components beyond this one
678 * will be dynamically init-ed later on file write/trunc ops.
680 if (lsm_entry_inited(lsm, i)) {
681 result = lle->lle_comp_ops->lco_init(env, dev, lov, i,
686 LASSERT(ergo(psz > 0, psz == result));
692 cl_object_header(&lov->lo_cl)->coh_page_bufsize += psz;
694 return result > 0 ? 0 : result;
697 static int lov_init_empty(const struct lu_env *env, struct lov_device *dev,
698 struct lov_object *lov, struct lov_stripe_md *lsm,
699 const struct cl_object_conf *conf,
700 union lov_layout_state *state)
705 static int lov_init_released(const struct lu_env *env,
706 struct lov_device *dev, struct lov_object *lov,
707 struct lov_stripe_md *lsm,
708 const struct cl_object_conf *conf,
709 union lov_layout_state *state)
711 LASSERT(lsm != NULL);
712 LASSERT(lsm->lsm_is_released);
713 LASSERT(lov->lo_lsm == NULL);
715 lov->lo_lsm = lsm_addref(lsm);
719 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
720 union lov_layout_state *state)
722 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
724 lov_layout_wait(env, lov);
728 static int lov_delete_composite(const struct lu_env *env,
729 struct lov_object *lov,
730 union lov_layout_state *state)
732 struct lov_layout_entry *entry;
733 struct lov_layout_composite *comp = &state->composite;
737 dump_lsm(D_INODE, lov->lo_lsm);
739 lov_layout_wait(env, lov);
740 if (comp->lo_entries)
741 lov_foreach_layout_entry(lov, entry)
742 lov_delete_raid0(env, lov, entry);
747 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
748 union lov_layout_state *state)
750 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
753 static void lov_fini_composite(const struct lu_env *env,
754 struct lov_object *lov,
755 union lov_layout_state *state)
757 struct lov_layout_composite *comp = &state->composite;
760 if (comp->lo_entries != NULL) {
761 struct lov_layout_entry *entry;
763 lov_foreach_layout_entry(lov, entry)
764 entry->lle_comp_ops->lco_fini(env, entry);
766 OBD_FREE(comp->lo_entries,
767 comp->lo_entry_count * sizeof(*comp->lo_entries));
768 comp->lo_entries = NULL;
771 dump_lsm(D_INODE, lov->lo_lsm);
772 lov_free_memmd(&lov->lo_lsm);
777 static void lov_fini_released(const struct lu_env *env, struct lov_object *lov,
778 union lov_layout_state *state)
781 dump_lsm(D_INODE, lov->lo_lsm);
782 lov_free_memmd(&lov->lo_lsm);
786 static int lov_print_empty(const struct lu_env *env, void *cookie,
787 lu_printer_t p, const struct lu_object *o)
789 (*p)(env, cookie, "empty %d\n", lu2lov(o)->lo_layout_invalid);
793 static int lov_print_composite(const struct lu_env *env, void *cookie,
794 lu_printer_t p, const struct lu_object *o)
796 struct lov_object *lov = lu2lov(o);
797 struct lov_stripe_md *lsm = lov->lo_lsm;
800 (*p)(env, cookie, "entries: %d, %s, lsm{%p 0x%08X %d %u}:\n",
801 lsm->lsm_entry_count,
802 lov->lo_layout_invalid ? "invalid" : "valid", lsm,
803 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
804 lsm->lsm_layout_gen);
806 for (i = 0; i < lsm->lsm_entry_count; i++) {
807 struct lov_stripe_md_entry *lse = lsm->lsm_entries[i];
808 struct lov_layout_entry *lle = lov_entry(lov, i);
811 DEXT ": { 0x%08X, %u, %#x, %u, %#x, %u, %u }\n",
812 PEXT(&lse->lsme_extent), lse->lsme_magic,
813 lse->lsme_id, lse->lsme_pattern, lse->lsme_layout_gen,
814 lse->lsme_flags, lse->lsme_stripe_count,
815 lse->lsme_stripe_size);
816 lov_print_raid0(env, cookie, p, lle);
822 static int lov_print_released(const struct lu_env *env, void *cookie,
823 lu_printer_t p, const struct lu_object *o)
825 struct lov_object *lov = lu2lov(o);
826 struct lov_stripe_md *lsm = lov->lo_lsm;
829 "released: %s, lsm{%p 0x%08X %d %u}:\n",
830 lov->lo_layout_invalid ? "invalid" : "valid", lsm,
831 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
832 lsm->lsm_layout_gen);
837 * Implements cl_object_operations::coo_attr_get() method for an object
838 * without stripes (LLT_EMPTY layout type).
840 * The only attributes this layer is authoritative in this case is
841 * cl_attr::cat_blocks---it's 0.
843 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
844 struct cl_attr *attr)
846 attr->cat_blocks = 0;
850 static int lov_attr_get_composite(const struct lu_env *env,
851 struct cl_object *obj,
852 struct cl_attr *attr)
854 struct lov_object *lov = cl2lov(obj);
855 struct lov_layout_entry *entry;
862 attr->cat_blocks = 0;
863 lov_foreach_layout_entry(lov, entry) {
864 struct cl_attr *lov_attr = NULL;
866 /* PFL: This component has not been init-ed. */
867 if (!lsm_entry_inited(lov->lo_lsm, index))
870 result = entry->lle_comp_ops->lco_getattr(env, lov, index,
877 if (lov_attr == NULL)
880 CDEBUG(D_INODE, "COMP ID #%i: s=%llu m=%llu a=%llu c=%llu "
881 "b=%llu\n", index - 1, lov_attr->cat_size,
882 lov_attr->cat_mtime, lov_attr->cat_atime,
883 lov_attr->cat_ctime, lov_attr->cat_blocks);
886 attr->cat_blocks += lov_attr->cat_blocks;
887 if (attr->cat_size < lov_attr->cat_size)
888 attr->cat_size = lov_attr->cat_size;
889 if (attr->cat_kms < lov_attr->cat_kms)
890 attr->cat_kms = lov_attr->cat_kms;
891 if (attr->cat_atime < lov_attr->cat_atime)
892 attr->cat_atime = lov_attr->cat_atime;
893 if (attr->cat_ctime < lov_attr->cat_ctime)
894 attr->cat_ctime = lov_attr->cat_ctime;
895 if (attr->cat_mtime < lov_attr->cat_mtime)
896 attr->cat_mtime = lov_attr->cat_mtime;
901 const static struct lov_layout_operations lov_dispatch[] = {
903 .llo_init = lov_init_empty,
904 .llo_delete = lov_delete_empty,
905 .llo_fini = lov_fini_empty,
906 .llo_print = lov_print_empty,
907 .llo_page_init = lov_page_init_empty,
908 .llo_lock_init = lov_lock_init_empty,
909 .llo_io_init = lov_io_init_empty,
910 .llo_getattr = lov_attr_get_empty,
913 .llo_init = lov_init_released,
914 .llo_delete = lov_delete_empty,
915 .llo_fini = lov_fini_released,
916 .llo_print = lov_print_released,
917 .llo_page_init = lov_page_init_empty,
918 .llo_lock_init = lov_lock_init_empty,
919 .llo_io_init = lov_io_init_released,
920 .llo_getattr = lov_attr_get_empty,
923 .llo_init = lov_init_composite,
924 .llo_delete = lov_delete_composite,
925 .llo_fini = lov_fini_composite,
926 .llo_print = lov_print_composite,
927 .llo_page_init = lov_page_init_composite,
928 .llo_lock_init = lov_lock_init_composite,
929 .llo_io_init = lov_io_init_composite,
930 .llo_getattr = lov_attr_get_composite,
935 * Performs a double-dispatch based on the layout type of an object.
937 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
939 struct lov_object *__obj = (obj); \
940 enum lov_layout_type __llt; \
942 __llt = __obj->lo_type; \
943 LASSERT(__llt < ARRAY_SIZE(lov_dispatch)); \
944 lov_dispatch[__llt].op(__VA_ARGS__); \
948 * Return lov_layout_type associated with a given lsm
950 static enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
955 if (lsm->lsm_is_released)
958 if (lsm->lsm_magic == LOV_MAGIC_V1 ||
959 lsm->lsm_magic == LOV_MAGIC_V3 ||
960 lsm->lsm_magic == LOV_MAGIC_COMP_V1)
966 static inline void lov_conf_freeze(struct lov_object *lov)
968 CDEBUG(D_INODE, "To take share lov(%p) owner %p/%p\n",
969 lov, lov->lo_owner, current);
970 if (lov->lo_owner != current)
971 down_read(&lov->lo_type_guard);
974 static inline void lov_conf_thaw(struct lov_object *lov)
976 CDEBUG(D_INODE, "To release share lov(%p) owner %p/%p\n",
977 lov, lov->lo_owner, current);
978 if (lov->lo_owner != current)
979 up_read(&lov->lo_type_guard);
982 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
984 struct lov_object *__obj = (obj); \
985 int __lock = !!(lock); \
986 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
989 lov_conf_freeze(__obj); \
990 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
992 lov_conf_thaw(__obj); \
997 * Performs a locked double-dispatch based on the layout type of an object.
999 #define LOV_2DISPATCH(obj, op, ...) \
1000 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
1002 #define LOV_2DISPATCH_VOID(obj, op, ...) \
1004 struct lov_object *__obj = (obj); \
1005 enum lov_layout_type __llt; \
1007 lov_conf_freeze(__obj); \
1008 __llt = __obj->lo_type; \
1009 LASSERT(__llt < ARRAY_SIZE(lov_dispatch)); \
1010 lov_dispatch[__llt].op(__VA_ARGS__); \
1011 lov_conf_thaw(__obj); \
1014 static void lov_conf_lock(struct lov_object *lov)
1016 LASSERT(lov->lo_owner != current);
1017 down_write(&lov->lo_type_guard);
1018 LASSERT(lov->lo_owner == NULL);
1019 lov->lo_owner = current;
1020 CDEBUG(D_INODE, "Took exclusive lov(%p) owner %p\n",
1021 lov, lov->lo_owner);
1024 static void lov_conf_unlock(struct lov_object *lov)
1026 CDEBUG(D_INODE, "To release exclusive lov(%p) owner %p\n",
1027 lov, lov->lo_owner);
1028 lov->lo_owner = NULL;
1029 up_write(&lov->lo_type_guard);
1032 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
1034 struct l_wait_info lwi = { 0 };
1037 while (atomic_read(&lov->lo_active_ios) > 0) {
1038 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
1039 PFID(lu_object_fid(lov2lu(lov))),
1040 atomic_read(&lov->lo_active_ios));
1042 l_wait_event(lov->lo_waitq,
1043 atomic_read(&lov->lo_active_ios) == 0, &lwi);
1048 static int lov_layout_change(const struct lu_env *unused,
1049 struct lov_object *lov, struct lov_stripe_md *lsm,
1050 const struct cl_object_conf *conf)
1052 enum lov_layout_type llt = lov_type(lsm);
1053 union lov_layout_state *state = &lov->u;
1054 const struct lov_layout_operations *old_ops;
1055 const struct lov_layout_operations *new_ops;
1056 struct lov_device *lov_dev = lov_object_dev(lov);
1062 LASSERT(lov->lo_type < ARRAY_SIZE(lov_dispatch));
1064 env = cl_env_get(&refcheck);
1066 RETURN(PTR_ERR(env));
1068 LASSERT(llt < ARRAY_SIZE(lov_dispatch));
1070 CDEBUG(D_INODE, DFID" from %s to %s\n",
1071 PFID(lu_object_fid(lov2lu(lov))),
1072 llt2str(lov->lo_type), llt2str(llt));
1074 old_ops = &lov_dispatch[lov->lo_type];
1075 new_ops = &lov_dispatch[llt];
1077 rc = cl_object_prune(env, &lov->lo_cl);
1081 rc = old_ops->llo_delete(env, lov, &lov->u);
1085 old_ops->llo_fini(env, lov, &lov->u);
1087 LASSERT(atomic_read(&lov->lo_active_ios) == 0);
1089 CDEBUG(D_INODE, DFID "Apply new layout lov %p, type %d\n",
1090 PFID(lu_object_fid(lov2lu(lov))), lov, llt);
1092 lov->lo_type = LLT_EMPTY;
1094 /* page bufsize fixup */
1095 cl_object_header(&lov->lo_cl)->coh_page_bufsize -=
1096 lov_page_slice_fixup(lov, NULL);
1098 rc = new_ops->llo_init(env, lov_dev, lov, lsm, conf, state);
1100 struct obd_device *obd = lov2obd(lov_dev->ld_lov);
1102 CERROR("%s: cannot apply new layout on "DFID" : rc = %d\n",
1103 obd->obd_name, PFID(lu_object_fid(lov2lu(lov))), rc);
1104 new_ops->llo_delete(env, lov, state);
1105 new_ops->llo_fini(env, lov, state);
1106 /* this file becomes an EMPTY file. */
1113 cl_env_put(env, &refcheck);
1117 /*****************************************************************************
1119 * Lov object operations.
1122 int lov_object_init(const struct lu_env *env, struct lu_object *obj,
1123 const struct lu_object_conf *conf)
1125 struct lov_object *lov = lu2lov(obj);
1126 struct lov_device *dev = lov_object_dev(lov);
1127 const struct cl_object_conf *cconf = lu2cl_conf(conf);
1128 union lov_layout_state *set = &lov->u;
1129 const struct lov_layout_operations *ops;
1130 struct lov_stripe_md *lsm = NULL;
1134 init_rwsem(&lov->lo_type_guard);
1135 atomic_set(&lov->lo_active_ios, 0);
1136 init_waitqueue_head(&lov->lo_waitq);
1137 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
1139 lov->lo_type = LLT_EMPTY;
1140 if (cconf->u.coc_layout.lb_buf != NULL) {
1141 lsm = lov_unpackmd(dev->ld_lov,
1142 cconf->u.coc_layout.lb_buf,
1143 cconf->u.coc_layout.lb_len);
1145 RETURN(PTR_ERR(lsm));
1147 dump_lsm(D_INODE, lsm);
1150 /* no locking is necessary, as object is being created */
1151 lov->lo_type = lov_type(lsm);
1152 ops = &lov_dispatch[lov->lo_type];
1153 rc = ops->llo_init(env, dev, lov, lsm, cconf, set);
1163 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
1164 const struct cl_object_conf *conf)
1166 struct lov_stripe_md *lsm = NULL;
1167 struct lov_object *lov = cl2lov(obj);
1171 if (conf->coc_opc == OBJECT_CONF_SET &&
1172 conf->u.coc_layout.lb_buf != NULL) {
1173 lsm = lov_unpackmd(lov_object_dev(lov)->ld_lov,
1174 conf->u.coc_layout.lb_buf,
1175 conf->u.coc_layout.lb_len);
1177 RETURN(PTR_ERR(lsm));
1178 dump_lsm(D_INODE, lsm);
1182 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
1183 lov->lo_layout_invalid = true;
1184 GOTO(out, result = 0);
1187 if (conf->coc_opc == OBJECT_CONF_WAIT) {
1188 if (lov->lo_layout_invalid &&
1189 atomic_read(&lov->lo_active_ios) > 0) {
1190 lov_conf_unlock(lov);
1191 result = lov_layout_wait(env, lov);
1197 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
1199 if ((lsm == NULL && lov->lo_lsm == NULL) ||
1200 ((lsm != NULL && lov->lo_lsm != NULL) &&
1201 (lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
1202 (lov->lo_lsm->lsm_entries[0]->lsme_pattern ==
1203 lsm->lsm_entries[0]->lsme_pattern))) {
1204 /* same version of layout */
1205 lov->lo_layout_invalid = false;
1206 GOTO(out, result = 0);
1209 /* will change layout - check if there still exists active IO. */
1210 if (atomic_read(&lov->lo_active_ios) > 0) {
1211 lov->lo_layout_invalid = true;
1212 GOTO(out, result = -EBUSY);
1215 result = lov_layout_change(env, lov, lsm, conf);
1216 lov->lo_layout_invalid = result != 0;
1220 lov_conf_unlock(lov);
1222 CDEBUG(D_INODE, DFID" lo_layout_invalid=%d\n",
1223 PFID(lu_object_fid(lov2lu(lov))), lov->lo_layout_invalid);
1227 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
1229 struct lov_object *lov = lu2lov(obj);
1232 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
1236 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
1238 struct lov_object *lov = lu2lov(obj);
1241 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
1242 lu_object_fini(obj);
1243 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
1247 static int lov_object_print(const struct lu_env *env, void *cookie,
1248 lu_printer_t p, const struct lu_object *o)
1250 return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
1253 int lov_page_init(const struct lu_env *env, struct cl_object *obj,
1254 struct cl_page *page, pgoff_t index)
1256 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_page_init, env, obj, page,
1261 * Implements cl_object_operations::clo_io_init() method for lov
1262 * layer. Dispatches to the appropriate layout io initialization method.
1264 int lov_io_init(const struct lu_env *env, struct cl_object *obj,
1267 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
1269 CDEBUG(D_INODE, DFID "io %p type %d ignore/verify layout %d/%d\n",
1270 PFID(lu_object_fid(&obj->co_lu)), io, io->ci_type,
1271 io->ci_ignore_layout, io->ci_verify_layout);
1273 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
1274 !io->ci_ignore_layout, env, obj, io);
1278 * An implementation of cl_object_operations::clo_attr_get() method for lov
1279 * layer. For raid0 layout this collects and merges attributes of all
1282 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
1283 struct cl_attr *attr)
1285 /* do not take lock, as this function is called under a
1286 * spin-lock. Layout is protected from changing by ongoing IO. */
1287 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
1290 static int lov_attr_update(const struct lu_env *env, struct cl_object *obj,
1291 const struct cl_attr *attr, unsigned valid)
1294 * No dispatch is required here, as no layout implements this.
1299 int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
1300 struct cl_lock *lock, const struct cl_io *io)
1302 /* No need to lock because we've taken one refcount of layout. */
1303 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
1308 * We calculate on which OST the mapping will end. If the length of mapping
1309 * is greater than (stripe_size * stripe_count) then the last_stripe will
1310 * will be one just before start_stripe. Else we check if the mapping
1311 * intersects each OST and find last_stripe.
1312 * This function returns the last_stripe and also sets the stripe_count
1313 * over which the mapping is spread
1315 * \param lsm [in] striping information for the file
1316 * \param index [in] stripe component index
1317 * \param ext [in] logical extent of mapping
1318 * \param start_stripe [in] starting stripe of the mapping
1319 * \param stripe_count [out] the number of stripes across which to map is
1322 * \retval last_stripe return the last stripe of the mapping
1324 static int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, int index,
1325 struct lu_extent *ext,
1326 int start_stripe, int *stripe_count)
1328 struct lov_stripe_md_entry *lsme = lsm->lsm_entries[index];
1334 if (ext->e_end - ext->e_start >
1335 lsme->lsme_stripe_size * lsme->lsme_stripe_count) {
1336 last_stripe = (start_stripe < 1 ? lsme->lsme_stripe_count - 1 :
1338 *stripe_count = lsme->lsme_stripe_count;
1340 for (j = 0, i = start_stripe; j < lsme->lsme_stripe_count;
1341 i = (i + 1) % lsme->lsme_stripe_count, j++) {
1342 if ((lov_stripe_intersects(lsm, index, i, ext,
1343 &obd_start, &obd_end)) == 0)
1347 last_stripe = (start_stripe + j - 1) % lsme->lsme_stripe_count;
1354 * Set fe_device and copy extents from local buffer into main return buffer.
1356 * \param fiemap [out] fiemap to hold all extents
1357 * \param lcl_fm_ext [in] array of fiemap extents get from OSC layer
1358 * \param ost_index [in] OST index to be written into the fm_device
1359 * field for each extent
1360 * \param ext_count [in] number of extents to be copied
1361 * \param current_extent [in] where to start copying in the extent array
1363 static void fiemap_prepare_and_copy_exts(struct fiemap *fiemap,
1364 struct fiemap_extent *lcl_fm_ext,
1365 int ost_index, unsigned int ext_count,
1371 for (ext = 0; ext < ext_count; ext++) {
1372 lcl_fm_ext[ext].fe_device = ost_index;
1373 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
1376 /* Copy fm_extent's from fm_local to return buffer */
1377 to = (char *)fiemap + fiemap_count_to_size(current_extent);
1378 memcpy(to, lcl_fm_ext, ext_count * sizeof(struct fiemap_extent));
1381 #define FIEMAP_BUFFER_SIZE 4096
1384 * Non-zero fe_logical indicates that this is a continuation FIEMAP
1385 * call. The local end offset and the device are sent in the first
1386 * fm_extent. This function calculates the stripe number from the index.
1387 * This function returns a stripe_no on which mapping is to be restarted.
1389 * This function returns fm_end_offset which is the in-OST offset at which
1390 * mapping should be restarted. If fm_end_offset=0 is returned then caller
1391 * will re-calculate proper offset in next stripe.
1392 * Note that the first extent is passed to lov_get_info via the value field.
1394 * \param fiemap [in] fiemap request header
1395 * \param lsm [in] striping information for the file
1396 * \param index [in] stripe component index
1397 * \param ext [in] logical extent of mapping
1398 * \param start_stripe [out] starting stripe will be returned in this
1400 static u64 fiemap_calc_fm_end_offset(struct fiemap *fiemap,
1401 struct lov_stripe_md *lsm,
1402 int index, struct lu_extent *ext,
1405 struct lov_stripe_md_entry *lsme = lsm->lsm_entries[index];
1406 u64 local_end = fiemap->fm_extents[0].fe_logical;
1413 if (fiemap->fm_extent_count == 0 ||
1414 fiemap->fm_extents[0].fe_logical == 0)
1417 /* Find out stripe_no from ost_index saved in the fe_device */
1418 for (i = 0; i < lsme->lsme_stripe_count; i++) {
1419 struct lov_oinfo *oinfo = lsme->lsme_oinfo[i];
1421 if (lov_oinfo_is_dummy(oinfo))
1424 if (oinfo->loi_ost_idx == fiemap->fm_extents[0].fe_device) {
1430 if (stripe_no == -1)
1433 /* If we have finished mapping on previous device, shift logical
1434 * offset to start of next device */
1435 if (lov_stripe_intersects(lsm, index, stripe_no, ext,
1436 &lun_start, &lun_end) != 0 &&
1437 local_end < lun_end) {
1438 fm_end_offset = local_end;
1439 *start_stripe = stripe_no;
1441 /* This is a special value to indicate that caller should
1442 * calculate offset in next stripe. */
1444 *start_stripe = (stripe_no + 1) % lsme->lsme_stripe_count;
1447 return fm_end_offset;
1450 struct fiemap_state {
1451 struct fiemap *fs_fm;
1452 struct lu_extent fs_ext;
1457 int fs_start_stripe;
1459 bool fs_device_done;
1460 bool fs_finish_stripe;
1464 static struct cl_object *lov_find_subobj(const struct lu_env *env,
1465 struct lov_object *lov,
1466 struct lov_stripe_md *lsm,
1469 struct lov_device *dev = lu2lov_dev(lov2lu(lov)->lo_dev);
1470 struct lov_thread_info *lti = lov_env_info(env);
1471 struct lu_fid *ofid = <i->lti_fid;
1472 struct lov_oinfo *oinfo;
1473 struct cl_device *subdev;
1474 int entry = lov_comp_entry(index);
1475 int stripe = lov_comp_stripe(index);
1478 struct cl_object *result;
1480 if (lov->lo_type != LLT_COMP)
1481 GOTO(out, result = NULL);
1483 if (entry >= lsm->lsm_entry_count ||
1484 stripe >= lsm->lsm_entries[entry]->lsme_stripe_count)
1485 GOTO(out, result = NULL);
1487 oinfo = lsm->lsm_entries[entry]->lsme_oinfo[stripe];
1488 ost_idx = oinfo->loi_ost_idx;
1489 rc = ostid_to_fid(ofid, &oinfo->loi_oi, ost_idx);
1491 GOTO(out, result = NULL);
1493 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
1494 result = lov_sub_find(env, subdev, ofid, NULL);
1497 result = ERR_PTR(-EINVAL);
1501 int fiemap_for_stripe(const struct lu_env *env, struct cl_object *obj,
1502 struct lov_stripe_md *lsm, struct fiemap *fiemap,
1503 size_t *buflen, struct ll_fiemap_info_key *fmkey,
1504 int index, int stripeno, struct fiemap_state *fs)
1506 struct lov_stripe_md_entry *lsme = lsm->lsm_entries[index];
1507 struct cl_object *subobj;
1508 struct lov_obd *lov = lu2lov_dev(obj->co_lu.lo_dev)->ld_lov;
1509 struct fiemap_extent *fm_ext = &fs->fs_fm->fm_extents[0];
1510 u64 req_fm_len; /* Stores length of required mapping */
1511 u64 len_mapped_single_call;
1515 unsigned int ext_count;
1516 /* EOF for object */
1517 bool ost_eof = false;
1518 /* done with required mapping for this OST? */
1519 bool ost_done = false;
1523 fs->fs_device_done = false;
1524 /* Find out range of mapping on this stripe */
1525 if ((lov_stripe_intersects(lsm, index, stripeno, &fs->fs_ext,
1526 &lun_start, &obd_object_end)) == 0)
1529 if (lov_oinfo_is_dummy(lsme->lsme_oinfo[stripeno]))
1532 /* If this is a continuation FIEMAP call and we are on
1533 * starting stripe then lun_start needs to be set to
1535 if (fs->fs_end_offset != 0 && stripeno == fs->fs_start_stripe)
1536 lun_start = fs->fs_end_offset;
1537 lun_end = lov_size_to_stripe(lsm, index, fs->fs_ext.e_end, stripeno);
1538 if (lun_start == lun_end)
1541 req_fm_len = obd_object_end - lun_start;
1542 fs->fs_fm->fm_length = 0;
1543 len_mapped_single_call = 0;
1545 /* find lobsub object */
1546 subobj = lov_find_subobj(env, cl2lov(obj), lsm,
1547 lov_comp_index(index, stripeno));
1549 return PTR_ERR(subobj);
1550 /* If the output buffer is very large and the objects have many
1551 * extents we may need to loop on a single OST repeatedly */
1553 if (fiemap->fm_extent_count > 0) {
1554 /* Don't get too many extents. */
1555 if (fs->fs_cur_extent + fs->fs_cnt_need >
1556 fiemap->fm_extent_count)
1557 fs->fs_cnt_need = fiemap->fm_extent_count -
1561 lun_start += len_mapped_single_call;
1562 fs->fs_fm->fm_length = req_fm_len - len_mapped_single_call;
1563 req_fm_len = fs->fs_fm->fm_length;
1565 * If we've collected enough extent map, we'd request 1 more,
1566 * to see whether we coincidentally finished all available
1567 * extent map, so that FIEMAP_EXTENT_LAST would be set.
1569 fs->fs_fm->fm_extent_count = fs->fs_enough ?
1570 1 : fs->fs_cnt_need;
1571 fs->fs_fm->fm_mapped_extents = 0;
1572 fs->fs_fm->fm_flags = fiemap->fm_flags;
1574 ost_index = lsme->lsme_oinfo[stripeno]->loi_ost_idx;
1576 if (ost_index < 0 || ost_index >= lov->desc.ld_tgt_count)
1577 GOTO(obj_put, rc = -EINVAL);
1578 /* If OST is inactive, return extent with UNKNOWN flag. */
1579 if (!lov->lov_tgts[ost_index]->ltd_active) {
1580 fs->fs_fm->fm_flags |= FIEMAP_EXTENT_LAST;
1581 fs->fs_fm->fm_mapped_extents = 1;
1583 fm_ext[0].fe_logical = lun_start;
1584 fm_ext[0].fe_length = obd_object_end - lun_start;
1585 fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
1590 fs->fs_fm->fm_start = lun_start;
1591 fs->fs_fm->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
1592 memcpy(&fmkey->lfik_fiemap, fs->fs_fm, sizeof(*fs->fs_fm));
1593 *buflen = fiemap_count_to_size(fs->fs_fm->fm_extent_count);
1595 rc = cl_object_fiemap(env, subobj, fmkey, fs->fs_fm, buflen);
1599 ext_count = fs->fs_fm->fm_mapped_extents;
1600 if (ext_count == 0) {
1602 fs->fs_device_done = true;
1603 /* If last stripe has hold at the end,
1604 * we need to return */
1605 if (stripeno == fs->fs_last_stripe) {
1606 fiemap->fm_mapped_extents = 0;
1607 fs->fs_finish_stripe = true;
1611 } else if (fs->fs_enough) {
1613 * We've collected enough extents and there are
1614 * more extents after it.
1619 /* If we just need num of extents, got to next device */
1620 if (fiemap->fm_extent_count == 0) {
1621 fs->fs_cur_extent += ext_count;
1625 /* prepare to copy retrived map extents */
1626 len_mapped_single_call = fm_ext[ext_count - 1].fe_logical +
1627 fm_ext[ext_count - 1].fe_length -
1630 /* Have we finished mapping on this device? */
1631 if (req_fm_len <= len_mapped_single_call) {
1633 fs->fs_device_done = true;
1636 /* Clear the EXTENT_LAST flag which can be present on
1637 * the last extent */
1638 if (fm_ext[ext_count - 1].fe_flags & FIEMAP_EXTENT_LAST)
1639 fm_ext[ext_count - 1].fe_flags &= ~FIEMAP_EXTENT_LAST;
1640 if (lov_stripe_size(lsm, index,
1641 fm_ext[ext_count - 1].fe_logical +
1642 fm_ext[ext_count - 1].fe_length,
1643 stripeno) >= fmkey->lfik_oa.o_size) {
1645 fs->fs_device_done = true;
1648 fiemap_prepare_and_copy_exts(fiemap, fm_ext, ost_index,
1649 ext_count, fs->fs_cur_extent);
1650 fs->fs_cur_extent += ext_count;
1652 /* Ran out of available extents? */
1653 if (fs->fs_cur_extent >= fiemap->fm_extent_count)
1654 fs->fs_enough = true;
1655 } while (!ost_done && !ost_eof);
1657 if (stripeno == fs->fs_last_stripe)
1658 fs->fs_finish_stripe = true;
1660 cl_object_put(env, subobj);
1666 * Break down the FIEMAP request and send appropriate calls to individual OSTs.
1667 * This also handles the restarting of FIEMAP calls in case mapping overflows
1668 * the available number of extents in single call.
1670 * \param env [in] lustre environment
1671 * \param obj [in] file object
1672 * \param fmkey [in] fiemap request header and other info
1673 * \param fiemap [out] fiemap buffer holding retrived map extents
1674 * \param buflen [in/out] max buffer length of @fiemap, when iterate
1675 * each OST, it is used to limit max map needed
1679 static int lov_object_fiemap(const struct lu_env *env, struct cl_object *obj,
1680 struct ll_fiemap_info_key *fmkey,
1681 struct fiemap *fiemap, size_t *buflen)
1683 struct lov_stripe_md_entry *lsme;
1684 struct lov_stripe_md *lsm;
1685 struct fiemap *fm_local = NULL;
1693 unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
1695 struct fiemap_state fs = { 0 };
1698 lsm = lov_lsm_addref(cl2lov(obj));
1702 if (!(fiemap->fm_flags & FIEMAP_FLAG_DEVICE_ORDER)) {
1704 * If the entry count > 1 or stripe_count > 1 and the
1705 * application does not understand DEVICE_ORDER flag,
1706 * it cannot interpret the extents correctly.
1708 if (lsm->lsm_entry_count > 1 ||
1709 (lsm->lsm_entry_count == 1 &&
1710 lsm->lsm_entries[0]->lsme_stripe_count > 1))
1711 GOTO(out_lsm, rc = -ENOTSUPP);
1714 /* No support for DOM layout yet. */
1715 if (lsme_is_dom(lsm->lsm_entries[0]))
1716 GOTO(out_lsm, rc = -ENOTSUPP);
1718 if (lsm->lsm_is_released) {
1719 if (fiemap->fm_start < fmkey->lfik_oa.o_size) {
1721 * released file, return a minimal FIEMAP if
1722 * request fits in file-size.
1724 fiemap->fm_mapped_extents = 1;
1725 fiemap->fm_extents[0].fe_logical = fiemap->fm_start;
1726 if (fiemap->fm_start + fiemap->fm_length <
1727 fmkey->lfik_oa.o_size)
1728 fiemap->fm_extents[0].fe_length =
1731 fiemap->fm_extents[0].fe_length =
1732 fmkey->lfik_oa.o_size -
1734 fiemap->fm_extents[0].fe_flags |=
1735 FIEMAP_EXTENT_UNKNOWN | FIEMAP_EXTENT_LAST;
1737 GOTO(out_lsm, rc = 0);
1740 /* buffer_size is small to hold fm_extent_count of extents. */
1741 if (fiemap_count_to_size(fiemap->fm_extent_count) < buffer_size)
1742 buffer_size = fiemap_count_to_size(fiemap->fm_extent_count);
1744 OBD_ALLOC_LARGE(fm_local, buffer_size);
1745 if (fm_local == NULL)
1746 GOTO(out_lsm, rc = -ENOMEM);
1749 * Requested extent count exceeds the fiemap buffer size, shrink our
1752 if (fiemap_count_to_size(fiemap->fm_extent_count) > *buflen)
1753 fiemap->fm_extent_count = fiemap_size_to_count(*buflen);
1754 if (fiemap->fm_extent_count == 0)
1757 fs.fs_enough = false;
1758 fs.fs_cur_extent = 0;
1759 fs.fs_fm = fm_local;
1760 fs.fs_cnt_need = fiemap_size_to_count(buffer_size);
1762 whole_start = fiemap->fm_start;
1763 /* whole_start is beyond the end of the file */
1764 if (whole_start > fmkey->lfik_oa.o_size)
1765 GOTO(out_fm_local, rc = -EINVAL);
1766 whole_end = (fiemap->fm_length == OBD_OBJECT_EOF) ?
1767 fmkey->lfik_oa.o_size :
1768 whole_start + fiemap->fm_length - 1;
1770 * If fiemap->fm_length != OBD_OBJECT_EOF but whole_end exceeds file
1773 if (whole_end > fmkey->lfik_oa.o_size)
1774 whole_end = fmkey->lfik_oa.o_size;
1776 start_entry = lov_lsm_entry(lsm, whole_start);
1777 end_entry = lov_lsm_entry(lsm, whole_end);
1778 if (end_entry == -1)
1779 end_entry = lsm->lsm_entry_count - 1;
1781 if (start_entry == -1 || end_entry == -1)
1782 GOTO(out_fm_local, rc = -EINVAL);
1784 for (entry = start_entry; entry <= end_entry; entry++) {
1785 lsme = lsm->lsm_entries[entry];
1787 if (!lsme_inited(lsme))
1790 if (entry == start_entry)
1791 fs.fs_ext.e_start = whole_start;
1793 fs.fs_ext.e_start = lsme->lsme_extent.e_start;
1794 if (entry == end_entry)
1795 fs.fs_ext.e_end = whole_end;
1797 fs.fs_ext.e_end = lsme->lsme_extent.e_end - 1;
1798 fs.fs_length = fs.fs_ext.e_end - fs.fs_ext.e_start + 1;
1800 /* Calculate start stripe, last stripe and length of mapping */
1801 fs.fs_start_stripe = lov_stripe_number(lsm, entry,
1803 fs.fs_last_stripe = fiemap_calc_last_stripe(lsm, entry,
1804 &fs.fs_ext, fs.fs_start_stripe,
1806 fs.fs_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, entry,
1807 &fs.fs_ext, &fs.fs_start_stripe);
1808 /* Check each stripe */
1809 for (cur_stripe = fs.fs_start_stripe; stripe_count > 0;
1811 cur_stripe = (cur_stripe + 1) % lsme->lsme_stripe_count) {
1812 rc = fiemap_for_stripe(env, obj, lsm, fiemap, buflen,
1813 fmkey, entry, cur_stripe, &fs);
1815 GOTO(out_fm_local, rc);
1818 if (fs.fs_finish_stripe)
1820 } /* for each stripe */
1821 } /* for covering layout component */
1823 * We've traversed all components, set @entry to the last component
1824 * entry, it's for the last stripe check.
1828 /* Indicate that we are returning device offsets unless file just has
1830 if (lsm->lsm_entry_count > 1 ||
1831 (lsm->lsm_entry_count == 1 &&
1832 lsm->lsm_entries[0]->lsme_stripe_count > 1))
1833 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
1835 if (fiemap->fm_extent_count == 0)
1836 goto skip_last_device_calc;
1838 /* Check if we have reached the last stripe and whether mapping for that
1839 * stripe is done. */
1840 if ((cur_stripe == fs.fs_last_stripe) && fs.fs_device_done)
1841 fiemap->fm_extents[fs.fs_cur_extent - 1].fe_flags |=
1843 skip_last_device_calc:
1844 fiemap->fm_mapped_extents = fs.fs_cur_extent;
1846 OBD_FREE_LARGE(fm_local, buffer_size);
1853 static int lov_object_getstripe(const struct lu_env *env, struct cl_object *obj,
1854 struct lov_user_md __user *lum, size_t size)
1856 struct lov_object *lov = cl2lov(obj);
1857 struct lov_stripe_md *lsm;
1861 lsm = lov_lsm_addref(lov);
1865 rc = lov_getstripe(env, cl2lov(obj), lsm, lum, size);
1870 static int lov_object_layout_get(const struct lu_env *env,
1871 struct cl_object *obj,
1872 struct cl_layout *cl)
1874 struct lov_object *lov = cl2lov(obj);
1875 struct lov_stripe_md *lsm = lov_lsm_addref(lov);
1876 struct lu_buf *buf = &cl->cl_buf;
1882 cl->cl_layout_gen = CL_LAYOUT_GEN_EMPTY;
1887 cl->cl_size = lov_comp_md_size(lsm);
1888 cl->cl_layout_gen = lsm->lsm_layout_gen;
1889 if (lsm_is_composite(lsm->lsm_magic)) {
1890 struct lov_stripe_md_entry *lsme = lsm->lsm_entries[0];
1892 cl->cl_is_composite = true;
1894 if (lsme_is_dom(lsme))
1895 cl->cl_dom_comp_size = lsme->lsme_extent.e_end;
1897 rc = lov_lsm_pack(lsm, buf->lb_buf, buf->lb_len);
1900 RETURN(rc < 0 ? rc : 0);
1903 static loff_t lov_object_maxbytes(struct cl_object *obj)
1905 struct lov_object *lov = cl2lov(obj);
1906 struct lov_stripe_md *lsm = lov_lsm_addref(lov);
1912 maxbytes = lsm->lsm_maxbytes;
1919 static const struct cl_object_operations lov_ops = {
1920 .coo_page_init = lov_page_init,
1921 .coo_lock_init = lov_lock_init,
1922 .coo_io_init = lov_io_init,
1923 .coo_attr_get = lov_attr_get,
1924 .coo_attr_update = lov_attr_update,
1925 .coo_conf_set = lov_conf_set,
1926 .coo_getstripe = lov_object_getstripe,
1927 .coo_layout_get = lov_object_layout_get,
1928 .coo_maxbytes = lov_object_maxbytes,
1929 .coo_fiemap = lov_object_fiemap,
1932 static const struct lu_object_operations lov_lu_obj_ops = {
1933 .loo_object_init = lov_object_init,
1934 .loo_object_delete = lov_object_delete,
1935 .loo_object_release = NULL,
1936 .loo_object_free = lov_object_free,
1937 .loo_object_print = lov_object_print,
1938 .loo_object_invariant = NULL
1941 struct lu_object *lov_object_alloc(const struct lu_env *env,
1942 const struct lu_object_header *unused,
1943 struct lu_device *dev)
1945 struct lov_object *lov;
1946 struct lu_object *obj;
1949 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, GFP_NOFS);
1952 lu_object_init(obj, NULL, dev);
1953 lov->lo_cl.co_ops = &lov_ops;
1954 lov->lo_type = -1; /* invalid, to catch uninitialized type */
1956 * object io operation vector (cl_object::co_iop) is installed
1957 * later in lov_object_init(), as different vectors are used
1958 * for object with different layouts.
1960 obj->lo_ops = &lov_lu_obj_ops;
1966 struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
1968 struct lov_stripe_md *lsm = NULL;
1970 lov_conf_freeze(lov);
1971 if (lov->lo_lsm != NULL) {
1972 lsm = lsm_addref(lov->lo_lsm);
1973 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
1974 lsm, atomic_read(&lsm->lsm_refc),
1975 lov->lo_layout_invalid, current);
1981 int lov_read_and_clear_async_rc(struct cl_object *clob)
1983 struct lu_object *luobj;
1987 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
1989 if (luobj != NULL) {
1990 struct lov_object *lov = lu2lov(luobj);
1992 lov_conf_freeze(lov);
1993 switch (lov->lo_type) {
1995 struct lov_stripe_md *lsm;
1999 LASSERT(lsm != NULL);
2000 for (i = 0; i < lsm->lsm_entry_count; i++) {
2001 struct lov_stripe_md_entry *lse =
2002 lsm->lsm_entries[i];
2005 if (!lsme_inited(lse))
2008 for (j = 0; j < lse->lsme_stripe_count; j++) {
2009 struct lov_oinfo *loi =
2012 if (lov_oinfo_is_dummy(loi))
2015 if (loi->loi_ar.ar_rc && !rc)
2016 rc = loi->loi_ar.ar_rc;
2017 loi->loi_ar.ar_rc = 0;
2031 EXPORT_SYMBOL(lov_read_and_clear_async_rc);