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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2015, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Implementation of cl_object for LOV layer.
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
39 * Author: Jinshan Xiong <jinshan.xiong@whamcloud.com>
42 #define DEBUG_SUBSYSTEM S_LOV
44 #include "lov_cl_internal.h"
46 static inline struct lov_device *lov_object_dev(struct lov_object *obj)
48 return lu2lov_dev(obj->lo_cl.co_lu.lo_dev);
55 /*****************************************************************************
61 struct lov_layout_operations {
62 int (*llo_init)(const struct lu_env *env, struct lov_device *dev,
63 struct lov_object *lov, struct lov_stripe_md *lsm,
64 const struct cl_object_conf *conf,
65 union lov_layout_state *state);
66 int (*llo_delete)(const struct lu_env *env, struct lov_object *lov,
67 union lov_layout_state *state);
68 void (*llo_fini)(const struct lu_env *env, struct lov_object *lov,
69 union lov_layout_state *state);
70 void (*llo_install)(const struct lu_env *env, struct lov_object *lov,
71 union lov_layout_state *state);
72 int (*llo_print)(const struct lu_env *env, void *cookie,
73 lu_printer_t p, const struct lu_object *o);
74 int (*llo_page_init)(const struct lu_env *env, struct cl_object *obj,
75 struct cl_page *page, pgoff_t index);
76 int (*llo_lock_init)(const struct lu_env *env,
77 struct cl_object *obj, struct cl_lock *lock,
78 const struct cl_io *io);
79 int (*llo_io_init)(const struct lu_env *env,
80 struct cl_object *obj, struct cl_io *io);
81 int (*llo_getattr)(const struct lu_env *env, struct cl_object *obj,
82 struct cl_attr *attr);
85 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov);
87 static void lov_lsm_put(struct lov_stripe_md *lsm)
93 /*****************************************************************************
95 * Lov object layout operations.
99 static void lov_install_empty(const struct lu_env *env,
100 struct lov_object *lov,
101 union lov_layout_state *state)
104 * File without objects.
108 static int lov_init_empty(const struct lu_env *env, struct lov_device *dev,
109 struct lov_object *lov, struct lov_stripe_md *lsm,
110 const struct cl_object_conf *conf,
111 union lov_layout_state *state)
116 static void lov_install_raid0(const struct lu_env *env,
117 struct lov_object *lov,
118 union lov_layout_state *state)
122 static struct cl_object *lov_sub_find(const struct lu_env *env,
123 struct cl_device *dev,
124 const struct lu_fid *fid,
125 const struct cl_object_conf *conf)
130 o = lu_object_find_at(env, cl2lu_dev(dev), fid, &conf->coc_lu);
131 LASSERT(ergo(!IS_ERR(o), o->lo_dev->ld_type == &lovsub_device_type));
135 static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
136 struct cl_object *stripe, struct lov_layout_raid0 *r0,
139 struct cl_object_header *hdr;
140 struct cl_object_header *subhdr;
141 struct cl_object_header *parent;
142 struct lov_oinfo *oinfo;
145 if (OBD_FAIL_CHECK(OBD_FAIL_LOV_INIT)) {
146 /* For sanity:test_206.
147 * Do not leave the object in cache to avoid accessing
148 * freed memory. This is because osc_object is referring to
149 * lov_oinfo of lsm_stripe_data which will be freed due to
151 cl_object_kill(env, stripe);
152 cl_object_put(env, stripe);
156 hdr = cl_object_header(lov2cl(lov));
157 subhdr = cl_object_header(stripe);
159 oinfo = lov->lo_lsm->lsm_oinfo[idx];
160 CDEBUG(D_INODE, DFID"@%p[%d] -> "DFID"@%p: ostid: "DOSTID
161 " idx: %d gen: %d\n",
162 PFID(&subhdr->coh_lu.loh_fid), subhdr, idx,
163 PFID(&hdr->coh_lu.loh_fid), hdr, POSTID(&oinfo->loi_oi),
164 oinfo->loi_ost_idx, oinfo->loi_ost_gen);
166 /* reuse ->coh_attr_guard to protect coh_parent change */
167 spin_lock(&subhdr->coh_attr_guard);
168 parent = subhdr->coh_parent;
169 if (parent == NULL) {
170 subhdr->coh_parent = hdr;
171 spin_unlock(&subhdr->coh_attr_guard);
172 subhdr->coh_nesting = hdr->coh_nesting + 1;
173 lu_object_ref_add(&stripe->co_lu, "lov-parent", lov);
174 r0->lo_sub[idx] = cl2lovsub(stripe);
175 r0->lo_sub[idx]->lso_super = lov;
176 r0->lo_sub[idx]->lso_index = idx;
179 struct lu_object *old_obj;
180 struct lov_object *old_lov;
181 unsigned int mask = D_INODE;
183 spin_unlock(&subhdr->coh_attr_guard);
184 old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
185 LASSERT(old_obj != NULL);
186 old_lov = cl2lov(lu2cl(old_obj));
187 if (old_lov->lo_layout_invalid) {
188 /* the object's layout has already changed but isn't
190 lu_object_unhash(env, &stripe->co_lu);
197 LU_OBJECT_DEBUG(mask, env, &stripe->co_lu,
198 "stripe %d is already owned.", idx);
199 LU_OBJECT_DEBUG(mask, env, old_obj, "owned.");
200 LU_OBJECT_HEADER(mask, env, lov2lu(lov), "try to own.\n");
201 cl_object_put(env, stripe);
206 static int lov_page_slice_fixup(struct lov_object *lov,
207 struct cl_object *stripe)
209 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
213 return hdr->coh_page_bufsize - lov->lo_cl.co_slice_off -
214 cfs_size_round(sizeof(struct lov_page));
216 cl_object_for_each(o, stripe)
217 o->co_slice_off += hdr->coh_page_bufsize;
219 return cl_object_header(stripe)->coh_page_bufsize;
222 static int lov_init_raid0(const struct lu_env *env, struct lov_device *dev,
223 struct lov_object *lov, struct lov_stripe_md *lsm,
224 const struct cl_object_conf *conf,
225 union lov_layout_state *state)
230 struct cl_object *stripe;
231 struct lov_thread_info *lti = lov_env_info(env);
232 struct cl_object_conf *subconf = <i->lti_stripe_conf;
233 struct lu_fid *ofid = <i->lti_fid;
234 struct lov_layout_raid0 *r0 = &state->raid0;
238 if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3) {
239 dump_lsm(D_ERROR, lsm);
240 LASSERTF(0, "magic mismatch, expected %d/%d, actual %d.\n",
241 LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
244 LASSERT(lov->lo_lsm == NULL);
245 lov->lo_lsm = lsm_addref(lsm);
246 r0->lo_nr = lsm->lsm_stripe_count;
247 LASSERT(r0->lo_nr <= lov_targets_nr(dev));
249 lov->lo_layout_invalid = true;
251 OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
252 if (r0->lo_sub != NULL) {
256 subconf->coc_inode = conf->coc_inode;
257 spin_lock_init(&r0->lo_sub_lock);
259 * Create stripe cl_objects.
261 for (i = 0; i < r0->lo_nr && result == 0; ++i) {
262 struct cl_device *subdev;
263 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
264 int ost_idx = oinfo->loi_ost_idx;
266 if (lov_oinfo_is_dummy(oinfo))
269 result = ostid_to_fid(ofid, &oinfo->loi_oi,
274 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
275 subconf->u.coc_oinfo = oinfo;
276 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
277 /* In the function below, .hs_keycmp resolves to
278 * lu_obj_hop_keycmp() */
279 /* coverity[overrun-buffer-val] */
280 stripe = lov_sub_find(env, subdev, ofid, subconf);
281 if (!IS_ERR(stripe)) {
282 result = lov_init_sub(env, lov, stripe, r0, i);
283 if (result == -EAGAIN) { /* try again */
289 result = PTR_ERR(stripe);
293 int sz = lov_page_slice_fixup(lov, stripe);
294 LASSERT(ergo(psz > 0, psz == sz));
299 cl_object_header(&lov->lo_cl)->coh_page_bufsize += psz;
306 static int lov_init_released(const struct lu_env *env,
307 struct lov_device *dev, struct lov_object *lov,
308 struct lov_stripe_md *lsm,
309 const struct cl_object_conf *conf,
310 union lov_layout_state *state)
312 LASSERT(lsm != NULL);
313 LASSERT(lsm_is_released(lsm));
314 LASSERT(lov->lo_lsm == NULL);
316 lov->lo_lsm = lsm_addref(lsm);
320 static struct cl_object *lov_find_subobj(const struct lu_env *env,
321 struct lov_object *lov,
322 struct lov_stripe_md *lsm,
325 struct lov_device *dev = lu2lov_dev(lov2lu(lov)->lo_dev);
326 struct lov_oinfo *oinfo = lsm->lsm_oinfo[stripe_idx];
327 struct lov_thread_info *lti = lov_env_info(env);
328 struct lu_fid *ofid = <i->lti_fid;
329 struct cl_device *subdev;
332 struct cl_object *result;
334 if (lov->lo_type != LLT_RAID0)
335 GOTO(out, result = NULL);
337 ost_idx = oinfo->loi_ost_idx;
338 rc = ostid_to_fid(ofid, &oinfo->loi_oi, ost_idx);
340 GOTO(out, result = NULL);
342 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
343 result = lov_sub_find(env, subdev, ofid, NULL);
346 result = ERR_PTR(-EINVAL);
350 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
351 union lov_layout_state *state)
353 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
355 lov_layout_wait(env, lov);
359 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
360 struct lovsub_object *los, int idx)
362 struct cl_object *sub;
363 struct lov_layout_raid0 *r0;
364 struct lu_site *site;
365 struct lu_site_bkt_data *bkt;
366 wait_queue_t *waiter;
369 LASSERT(r0->lo_sub[idx] == los);
371 sub = lovsub2cl(los);
372 site = sub->co_lu.lo_dev->ld_site;
373 bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
375 cl_object_kill(env, sub);
376 /* release a reference to the sub-object and ... */
377 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
378 cl_object_put(env, sub);
380 /* ... wait until it is actually destroyed---sub-object clears its
381 * ->lo_sub[] slot in lovsub_object_fini() */
382 if (r0->lo_sub[idx] == los) {
383 waiter = &lov_env_info(env)->lti_waiter;
384 init_waitqueue_entry(waiter, current);
385 add_wait_queue(&bkt->lsb_marche_funebre, waiter);
386 set_current_state(TASK_UNINTERRUPTIBLE);
388 /* this wait-queue is signaled at the end of
389 * lu_object_free(). */
390 set_current_state(TASK_UNINTERRUPTIBLE);
391 spin_lock(&r0->lo_sub_lock);
392 if (r0->lo_sub[idx] == los) {
393 spin_unlock(&r0->lo_sub_lock);
396 spin_unlock(&r0->lo_sub_lock);
397 set_current_state(TASK_RUNNING);
401 remove_wait_queue(&bkt->lsb_marche_funebre, waiter);
403 LASSERT(r0->lo_sub[idx] == NULL);
406 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
407 union lov_layout_state *state)
409 struct lov_layout_raid0 *r0 = &state->raid0;
410 struct lov_stripe_md *lsm = lov->lo_lsm;
415 dump_lsm(D_INODE, lsm);
417 lov_layout_wait(env, lov);
418 if (r0->lo_sub != NULL) {
419 for (i = 0; i < r0->lo_nr; ++i) {
420 struct lovsub_object *los = r0->lo_sub[i];
423 cl_object_prune(env, &los->lso_cl);
425 * If top-level object is to be evicted from
426 * the cache, so are its sub-objects.
428 lov_subobject_kill(env, lov, los, i);
435 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
436 union lov_layout_state *state)
438 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
441 static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
442 union lov_layout_state *state)
444 struct lov_layout_raid0 *r0 = &state->raid0;
447 if (r0->lo_sub != NULL) {
448 OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
452 dump_lsm(D_INODE, lov->lo_lsm);
453 lov_free_memmd(&lov->lo_lsm);
458 static void lov_fini_released(const struct lu_env *env, struct lov_object *lov,
459 union lov_layout_state *state)
462 dump_lsm(D_INODE, lov->lo_lsm);
463 lov_free_memmd(&lov->lo_lsm);
467 static int lov_print_empty(const struct lu_env *env, void *cookie,
468 lu_printer_t p, const struct lu_object *o)
470 (*p)(env, cookie, "empty %d\n", lu2lov(o)->lo_layout_invalid);
474 static int lov_print_raid0(const struct lu_env *env, void *cookie,
475 lu_printer_t p, const struct lu_object *o)
477 struct lov_object *lov = lu2lov(o);
478 struct lov_layout_raid0 *r0 = lov_r0(lov);
479 struct lov_stripe_md *lsm = lov->lo_lsm;
482 (*p)(env, cookie, "stripes: %d, %s, lsm{%p 0x%08X %d %u %u}:\n",
483 r0->lo_nr, lov->lo_layout_invalid ? "invalid" : "valid", lsm,
484 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
485 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
486 for (i = 0; i < r0->lo_nr; ++i) {
487 struct lu_object *sub;
489 if (r0->lo_sub[i] != NULL) {
490 sub = lovsub2lu(r0->lo_sub[i]);
491 lu_object_print(env, cookie, p, sub);
493 (*p)(env, cookie, "sub %d absent\n", i);
499 static int lov_print_released(const struct lu_env *env, void *cookie,
500 lu_printer_t p, const struct lu_object *o)
502 struct lov_object *lov = lu2lov(o);
503 struct lov_stripe_md *lsm = lov->lo_lsm;
506 "released: %s, lsm{%p 0x%08X %d %u %u}:\n",
507 lov->lo_layout_invalid ? "invalid" : "valid", lsm,
508 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
509 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
514 * Implements cl_object_operations::coo_attr_get() method for an object
515 * without stripes (LLT_EMPTY layout type).
517 * The only attributes this layer is authoritative in this case is
518 * cl_attr::cat_blocks---it's 0.
520 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
521 struct cl_attr *attr)
523 attr->cat_blocks = 0;
527 static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
528 struct cl_attr *attr)
530 struct lov_object *lov = cl2lov(obj);
531 struct lov_layout_raid0 *r0 = lov_r0(lov);
532 struct cl_attr *lov_attr = &r0->lo_attr;
537 /* this is called w/o holding type guard mutex, so it must be inside
538 * an on going IO otherwise lsm may be replaced.
539 * LU-2117: it turns out there exists one exception. For mmaped files,
540 * the lock of those files may be requested in the other file's IO
541 * context, and this function is called in ccc_lock_state(), it will
542 * hit this assertion.
543 * Anyway, it's still okay to call attr_get w/o type guard as layout
544 * can't go if locks exist. */
545 /* LASSERT(atomic_read(&lsm->lsm_refc) > 1); */
547 if (!r0->lo_attr_valid) {
548 struct lov_stripe_md *lsm = lov->lo_lsm;
549 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
552 memset(lvb, 0, sizeof(*lvb));
553 /* XXX: timestamps can be negative by sanity:test_39m,
555 lvb->lvb_atime = LLONG_MIN;
556 lvb->lvb_ctime = LLONG_MIN;
557 lvb->lvb_mtime = LLONG_MIN;
560 * XXX that should be replaced with a loop over sub-objects,
561 * doing cl_object_attr_get() on them. But for now, let's
562 * reuse old lov code.
566 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
567 * happy. It's not needed, because new code uses
568 * ->coh_attr_guard spin-lock to protect consistency of
569 * sub-object attributes.
571 lov_stripe_lock(lsm);
572 result = lov_merge_lvb_kms(lsm, lvb, &kms);
573 lov_stripe_unlock(lsm);
575 cl_lvb2attr(lov_attr, lvb);
576 lov_attr->cat_kms = kms;
577 r0->lo_attr_valid = 1;
580 if (result == 0) { /* merge results */
581 attr->cat_blocks = lov_attr->cat_blocks;
582 attr->cat_size = lov_attr->cat_size;
583 attr->cat_kms = lov_attr->cat_kms;
584 if (attr->cat_atime < lov_attr->cat_atime)
585 attr->cat_atime = lov_attr->cat_atime;
586 if (attr->cat_ctime < lov_attr->cat_ctime)
587 attr->cat_ctime = lov_attr->cat_ctime;
588 if (attr->cat_mtime < lov_attr->cat_mtime)
589 attr->cat_mtime = lov_attr->cat_mtime;
594 const static struct lov_layout_operations lov_dispatch[] = {
596 .llo_init = lov_init_empty,
597 .llo_delete = lov_delete_empty,
598 .llo_fini = lov_fini_empty,
599 .llo_install = lov_install_empty,
600 .llo_print = lov_print_empty,
601 .llo_page_init = lov_page_init_empty,
602 .llo_lock_init = lov_lock_init_empty,
603 .llo_io_init = lov_io_init_empty,
604 .llo_getattr = lov_attr_get_empty,
607 .llo_init = lov_init_raid0,
608 .llo_delete = lov_delete_raid0,
609 .llo_fini = lov_fini_raid0,
610 .llo_install = lov_install_raid0,
611 .llo_print = lov_print_raid0,
612 .llo_page_init = lov_page_init_raid0,
613 .llo_lock_init = lov_lock_init_raid0,
614 .llo_io_init = lov_io_init_raid0,
615 .llo_getattr = lov_attr_get_raid0,
618 .llo_init = lov_init_released,
619 .llo_delete = lov_delete_empty,
620 .llo_fini = lov_fini_released,
621 .llo_install = lov_install_empty,
622 .llo_print = lov_print_released,
623 .llo_page_init = lov_page_init_empty,
624 .llo_lock_init = lov_lock_init_empty,
625 .llo_io_init = lov_io_init_released,
626 .llo_getattr = lov_attr_get_empty,
631 * Performs a double-dispatch based on the layout type of an object.
633 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
635 struct lov_object *__obj = (obj); \
636 enum lov_layout_type __llt; \
638 __llt = __obj->lo_type; \
639 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
640 lov_dispatch[__llt].op(__VA_ARGS__); \
644 * Return lov_layout_type associated with a given lsm
646 static enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
650 if (lsm_is_released(lsm))
655 static inline void lov_conf_freeze(struct lov_object *lov)
657 if (lov->lo_owner != current)
658 down_read(&lov->lo_type_guard);
661 static inline void lov_conf_thaw(struct lov_object *lov)
663 if (lov->lo_owner != current)
664 up_read(&lov->lo_type_guard);
667 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
669 struct lov_object *__obj = (obj); \
670 int __lock = !!(lock); \
671 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
674 lov_conf_freeze(__obj); \
675 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
677 lov_conf_thaw(__obj); \
682 * Performs a locked double-dispatch based on the layout type of an object.
684 #define LOV_2DISPATCH(obj, op, ...) \
685 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
687 #define LOV_2DISPATCH_VOID(obj, op, ...) \
689 struct lov_object *__obj = (obj); \
690 enum lov_layout_type __llt; \
692 lov_conf_freeze(__obj); \
693 __llt = __obj->lo_type; \
694 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
695 lov_dispatch[__llt].op(__VA_ARGS__); \
696 lov_conf_thaw(__obj); \
699 static void lov_conf_lock(struct lov_object *lov)
701 LASSERT(lov->lo_owner != current);
702 down_write(&lov->lo_type_guard);
703 LASSERT(lov->lo_owner == NULL);
704 lov->lo_owner = current;
707 static void lov_conf_unlock(struct lov_object *lov)
709 lov->lo_owner = NULL;
710 up_write(&lov->lo_type_guard);
713 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
715 struct l_wait_info lwi = { 0 };
718 while (atomic_read(&lov->lo_active_ios) > 0) {
719 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
720 PFID(lu_object_fid(lov2lu(lov))),
721 atomic_read(&lov->lo_active_ios));
723 l_wait_event(lov->lo_waitq,
724 atomic_read(&lov->lo_active_ios) == 0, &lwi);
729 static int lov_layout_change(const struct lu_env *unused,
730 struct lov_object *lov, struct lov_stripe_md *lsm,
731 const struct cl_object_conf *conf)
733 enum lov_layout_type llt = lov_type(lsm);
734 union lov_layout_state *state = &lov->u;
735 const struct lov_layout_operations *old_ops;
736 const struct lov_layout_operations *new_ops;
742 LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
744 env = cl_env_get(&refcheck);
746 RETURN(PTR_ERR(env));
748 LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
750 CDEBUG(D_INODE, DFID" from %s to %s\n",
751 PFID(lu_object_fid(lov2lu(lov))),
752 llt2str(lov->lo_type), llt2str(llt));
754 old_ops = &lov_dispatch[lov->lo_type];
755 new_ops = &lov_dispatch[llt];
757 rc = cl_object_prune(env, &lov->lo_cl);
761 rc = old_ops->llo_delete(env, lov, &lov->u);
765 old_ops->llo_fini(env, lov, &lov->u);
767 LASSERT(atomic_read(&lov->lo_active_ios) == 0);
769 lov->lo_type = LLT_EMPTY;
771 /* page bufsize fixup */
772 cl_object_header(&lov->lo_cl)->coh_page_bufsize -=
773 lov_page_slice_fixup(lov, NULL);
775 rc = new_ops->llo_init(env, lov_object_dev(lov), lov, lsm, conf, state);
777 new_ops->llo_delete(env, lov, state);
778 new_ops->llo_fini(env, lov, state);
779 /* this file becomes an EMPTY file. */
783 new_ops->llo_install(env, lov, state);
787 cl_env_put(env, &refcheck);
791 /*****************************************************************************
793 * Lov object operations.
796 int lov_object_init(const struct lu_env *env, struct lu_object *obj,
797 const struct lu_object_conf *conf)
799 struct lov_object *lov = lu2lov(obj);
800 struct lov_device *dev = lov_object_dev(lov);
801 const struct cl_object_conf *cconf = lu2cl_conf(conf);
802 union lov_layout_state *set = &lov->u;
803 const struct lov_layout_operations *ops;
804 struct lov_stripe_md *lsm = NULL;
808 init_rwsem(&lov->lo_type_guard);
809 atomic_set(&lov->lo_active_ios, 0);
810 init_waitqueue_head(&lov->lo_waitq);
811 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
813 lov->lo_type = LLT_EMPTY;
814 if (cconf->u.coc_layout.lb_buf != NULL) {
815 lsm = lov_unpackmd(dev->ld_lov,
816 cconf->u.coc_layout.lb_buf,
817 cconf->u.coc_layout.lb_len);
819 RETURN(PTR_ERR(lsm));
822 /* no locking is necessary, as object is being created */
823 lov->lo_type = lov_type(lsm);
824 ops = &lov_dispatch[lov->lo_type];
825 rc = ops->llo_init(env, dev, lov, lsm, cconf, set);
829 ops->llo_install(env, lov, set);
837 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
838 const struct cl_object_conf *conf)
840 struct lov_stripe_md *lsm = NULL;
841 struct lov_object *lov = cl2lov(obj);
845 if (conf->coc_opc == OBJECT_CONF_SET &&
846 conf->u.coc_layout.lb_buf != NULL) {
847 lsm = lov_unpackmd(lov_object_dev(lov)->ld_lov,
848 conf->u.coc_layout.lb_buf,
849 conf->u.coc_layout.lb_len);
851 RETURN(PTR_ERR(lsm));
855 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
856 lov->lo_layout_invalid = true;
857 GOTO(out, result = 0);
860 if (conf->coc_opc == OBJECT_CONF_WAIT) {
861 if (lov->lo_layout_invalid &&
862 atomic_read(&lov->lo_active_ios) > 0) {
863 lov_conf_unlock(lov);
864 result = lov_layout_wait(env, lov);
870 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
872 if ((lsm == NULL && lov->lo_lsm == NULL) ||
873 ((lsm != NULL && lov->lo_lsm != NULL) &&
874 (lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
875 (lov->lo_lsm->lsm_pattern == lsm->lsm_pattern))) {
876 /* same version of layout */
877 lov->lo_layout_invalid = false;
878 GOTO(out, result = 0);
881 /* will change layout - check if there still exists active IO. */
882 if (atomic_read(&lov->lo_active_ios) > 0) {
883 lov->lo_layout_invalid = true;
884 GOTO(out, result = -EBUSY);
887 result = lov_layout_change(env, lov, lsm, conf);
888 lov->lo_layout_invalid = result != 0;
892 lov_conf_unlock(lov);
894 CDEBUG(D_INODE, DFID" lo_layout_invalid=%d\n",
895 PFID(lu_object_fid(lov2lu(lov))), lov->lo_layout_invalid);
899 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
901 struct lov_object *lov = lu2lov(obj);
904 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
908 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
910 struct lov_object *lov = lu2lov(obj);
913 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
915 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
919 static int lov_object_print(const struct lu_env *env, void *cookie,
920 lu_printer_t p, const struct lu_object *o)
922 return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
925 int lov_page_init(const struct lu_env *env, struct cl_object *obj,
926 struct cl_page *page, pgoff_t index)
928 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_page_init, env, obj, page,
933 * Implements cl_object_operations::clo_io_init() method for lov
934 * layer. Dispatches to the appropriate layout io initialization method.
936 int lov_io_init(const struct lu_env *env, struct cl_object *obj,
939 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
940 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
941 !io->ci_ignore_layout, env, obj, io);
945 * An implementation of cl_object_operations::clo_attr_get() method for lov
946 * layer. For raid0 layout this collects and merges attributes of all
949 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
950 struct cl_attr *attr)
952 /* do not take lock, as this function is called under a
953 * spin-lock. Layout is protected from changing by ongoing IO. */
954 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
957 static int lov_attr_update(const struct lu_env *env, struct cl_object *obj,
958 const struct cl_attr *attr, unsigned valid)
961 * No dispatch is required here, as no layout implements this.
966 int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
967 struct cl_lock *lock, const struct cl_io *io)
969 /* No need to lock because we've taken one refcount of layout. */
970 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
975 * We calculate on which OST the mapping will end. If the length of mapping
976 * is greater than (stripe_size * stripe_count) then the last_stripe will
977 * will be one just before start_stripe. Else we check if the mapping
978 * intersects each OST and find last_stripe.
979 * This function returns the last_stripe and also sets the stripe_count
980 * over which the mapping is spread
982 * \param lsm [in] striping information for the file
983 * \param fm_start [in] logical start of mapping
984 * \param fm_end [in] logical end of mapping
985 * \param start_stripe [in] starting stripe of the mapping
986 * \param stripe_count [out] the number of stripes across which to map is
989 * \retval last_stripe return the last stripe of the mapping
991 static int fiemap_calc_last_stripe(struct lov_stripe_md *lsm,
992 loff_t fm_start, loff_t fm_end,
993 int start_stripe, int *stripe_count)
1000 if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
1001 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
1003 *stripe_count = lsm->lsm_stripe_count;
1005 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
1006 i = (i + 1) % lsm->lsm_stripe_count, j++) {
1007 if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
1008 &obd_start, &obd_end)) == 0)
1012 last_stripe = (start_stripe + j - 1) % lsm->lsm_stripe_count;
1019 * Set fe_device and copy extents from local buffer into main return buffer.
1021 * \param fiemap [out] fiemap to hold all extents
1022 * \param lcl_fm_ext [in] array of fiemap extents get from OSC layer
1023 * \param ost_index [in] OST index to be written into the fm_device
1024 * field for each extent
1025 * \param ext_count [in] number of extents to be copied
1026 * \param current_extent [in] where to start copying in the extent array
1028 static void fiemap_prepare_and_copy_exts(struct fiemap *fiemap,
1029 struct fiemap_extent *lcl_fm_ext,
1030 int ost_index, unsigned int ext_count,
1036 for (ext = 0; ext < ext_count; ext++) {
1037 lcl_fm_ext[ext].fe_device = ost_index;
1038 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
1041 /* Copy fm_extent's from fm_local to return buffer */
1042 to = (char *)fiemap + fiemap_count_to_size(current_extent);
1043 memcpy(to, lcl_fm_ext, ext_count * sizeof(struct fiemap_extent));
1046 #define FIEMAP_BUFFER_SIZE 4096
1049 * Non-zero fe_logical indicates that this is a continuation FIEMAP
1050 * call. The local end offset and the device are sent in the first
1051 * fm_extent. This function calculates the stripe number from the index.
1052 * This function returns a stripe_no on which mapping is to be restarted.
1054 * This function returns fm_end_offset which is the in-OST offset at which
1055 * mapping should be restarted. If fm_end_offset=0 is returned then caller
1056 * will re-calculate proper offset in next stripe.
1057 * Note that the first extent is passed to lov_get_info via the value field.
1059 * \param fiemap [in] fiemap request header
1060 * \param lsm [in] striping information for the file
1061 * \param fm_start [in] logical start of mapping
1062 * \param fm_end [in] logical end of mapping
1063 * \param start_stripe [out] starting stripe will be returned in this
1065 static loff_t fiemap_calc_fm_end_offset(struct fiemap *fiemap,
1066 struct lov_stripe_md *lsm,
1067 loff_t fm_start, loff_t fm_end,
1070 loff_t local_end = fiemap->fm_extents[0].fe_logical;
1073 loff_t fm_end_offset;
1077 if (fiemap->fm_extent_count == 0 ||
1078 fiemap->fm_extents[0].fe_logical == 0)
1081 /* Find out stripe_no from ost_index saved in the fe_device */
1082 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1083 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
1085 if (lov_oinfo_is_dummy(oinfo))
1088 if (oinfo->loi_ost_idx == fiemap->fm_extents[0].fe_device) {
1094 if (stripe_no == -1)
1097 /* If we have finished mapping on previous device, shift logical
1098 * offset to start of next device */
1099 if (lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
1100 &lun_start, &lun_end) != 0 &&
1101 local_end < lun_end) {
1102 fm_end_offset = local_end;
1103 *start_stripe = stripe_no;
1105 /* This is a special value to indicate that caller should
1106 * calculate offset in next stripe. */
1108 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
1111 return fm_end_offset;
1115 * Break down the FIEMAP request and send appropriate calls to individual OSTs.
1116 * This also handles the restarting of FIEMAP calls in case mapping overflows
1117 * the available number of extents in single call.
1119 * \param env [in] lustre environment
1120 * \param obj [in] file object
1121 * \param fmkey [in] fiemap request header and other info
1122 * \param fiemap [out] fiemap buffer holding retrived map extents
1123 * \param buflen [in/out] max buffer length of @fiemap, when iterate
1124 * each OST, it is used to limit max map needed
1128 static int lov_object_fiemap(const struct lu_env *env, struct cl_object *obj,
1129 struct ll_fiemap_info_key *fmkey,
1130 struct fiemap *fiemap, size_t *buflen)
1132 struct lov_stripe_md *lsm;
1133 struct cl_object *subobj = NULL;
1134 struct lov_obd *lov = lu2lov_dev(obj->co_lu.lo_dev)->ld_lov;
1135 struct fiemap *fm_local = NULL;
1136 struct fiemap_extent *lcl_fm_ext;
1140 loff_t fm_end_offset;
1144 int current_extent = 0;
1148 int cur_stripe_wrap = 0;
1150 unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
1151 /* Whether have we collected enough extents */
1152 bool enough = false;
1153 /* EOF for object */
1154 bool ost_eof = false;
1155 /* done with required mapping for this OST? */
1156 bool ost_done = false;
1159 lsm = lov_lsm_addref(cl2lov(obj));
1164 * If the stripe_count > 1 and the application does not understand
1165 * DEVICE_ORDER flag, it cannot interpret the extents correctly.
1167 if (lsm->lsm_stripe_count > 1 && !(fiemap->fm_flags &
1168 FIEMAP_FLAG_DEVICE_ORDER))
1169 GOTO(out_lsm, rc = -ENOTSUPP);
1171 if (lsm_is_released(lsm)) {
1172 if (fiemap->fm_start < fmkey->lfik_oa.o_size) {
1174 * released file, return a minimal FIEMAP if
1175 * request fits in file-size.
1177 fiemap->fm_mapped_extents = 1;
1178 fiemap->fm_extents[0].fe_logical = fiemap->fm_start;
1179 if (fiemap->fm_start + fiemap->fm_length <
1180 fmkey->lfik_oa.o_size)
1181 fiemap->fm_extents[0].fe_length =
1184 fiemap->fm_extents[0].fe_length =
1185 fmkey->lfik_oa.o_size -
1187 fiemap->fm_extents[0].fe_flags |=
1188 FIEMAP_EXTENT_UNKNOWN | FIEMAP_EXTENT_LAST;
1190 GOTO(out_lsm, rc = 0);
1193 if (fiemap_count_to_size(fiemap->fm_extent_count) < buffer_size)
1194 buffer_size = fiemap_count_to_size(fiemap->fm_extent_count);
1196 OBD_ALLOC_LARGE(fm_local, buffer_size);
1197 if (fm_local == NULL)
1198 GOTO(out_lsm, rc = -ENOMEM);
1199 lcl_fm_ext = &fm_local->fm_extents[0];
1200 count_local = fiemap_size_to_count(buffer_size);
1202 fm_start = fiemap->fm_start;
1203 fm_length = fiemap->fm_length;
1204 /* Calculate start stripe, last stripe and length of mapping */
1205 start_stripe = lov_stripe_number(lsm, fm_start);
1206 fm_end = (fm_length == ~0ULL) ? fmkey->lfik_oa.o_size :
1207 fm_start + fm_length - 1;
1208 /* If fm_length != ~0ULL but fm_start_fm_length-1 exceeds file size */
1209 if (fm_end > fmkey->lfik_oa.o_size)
1210 fm_end = fmkey->lfik_oa.o_size;
1212 last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
1213 start_stripe, &stripe_count);
1214 fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start, fm_end,
1216 if (fm_end_offset == -EINVAL)
1217 GOTO(out_fm_local, rc = -EINVAL);
1220 * Requested extent count exceeds the fiemap buffer size, shrink our
1223 if (fiemap_count_to_size(fiemap->fm_extent_count) > *buflen)
1224 fiemap->fm_extent_count = fiemap_size_to_count(*buflen);
1225 if (fiemap->fm_extent_count == 0)
1228 /* Check each stripe */
1229 for (cur_stripe = start_stripe; stripe_count > 0;
1231 cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
1232 loff_t req_fm_len; /* Stores length of required mapping */
1233 loff_t len_mapped_single_call;
1236 loff_t obd_object_end;
1237 unsigned int ext_count;
1239 cur_stripe_wrap = cur_stripe;
1241 /* Find out range of mapping on this stripe */
1242 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
1243 &lun_start, &obd_object_end)) == 0)
1246 if (lov_oinfo_is_dummy(lsm->lsm_oinfo[cur_stripe]))
1247 GOTO(out_fm_local, rc = -EIO);
1249 /* If this is a continuation FIEMAP call and we are on
1250 * starting stripe then lun_start needs to be set to
1252 if (fm_end_offset != 0 && cur_stripe == start_stripe)
1253 lun_start = fm_end_offset;
1255 if (fm_length != ~0ULL) {
1256 /* Handle fm_start + fm_length overflow */
1257 if (fm_start + fm_length < fm_start)
1258 fm_length = ~0ULL - fm_start;
1259 lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
1265 if (lun_start == lun_end)
1268 req_fm_len = obd_object_end - lun_start;
1269 fm_local->fm_length = 0;
1270 len_mapped_single_call = 0;
1272 /* find lobsub object */
1273 subobj = lov_find_subobj(env, cl2lov(obj), lsm,
1276 GOTO(out_fm_local, rc = PTR_ERR(subobj));
1277 /* If the output buffer is very large and the objects have many
1278 * extents we may need to loop on a single OST repeatedly */
1282 if (fiemap->fm_extent_count > 0) {
1283 /* Don't get too many extents. */
1284 if (current_extent + count_local >
1285 fiemap->fm_extent_count)
1286 count_local = fiemap->fm_extent_count -
1290 lun_start += len_mapped_single_call;
1291 fm_local->fm_length = req_fm_len -
1292 len_mapped_single_call;
1293 req_fm_len = fm_local->fm_length;
1294 fm_local->fm_extent_count = enough ? 1 : count_local;
1295 fm_local->fm_mapped_extents = 0;
1296 fm_local->fm_flags = fiemap->fm_flags;
1298 ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
1300 if (ost_index < 0 ||
1301 ost_index >= lov->desc.ld_tgt_count)
1302 GOTO(obj_put, rc = -EINVAL);
1303 /* If OST is inactive, return extent with UNKNOWN
1305 if (!lov->lov_tgts[ost_index]->ltd_active) {
1306 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
1307 fm_local->fm_mapped_extents = 1;
1309 lcl_fm_ext[0].fe_logical = lun_start;
1310 lcl_fm_ext[0].fe_length = obd_object_end -
1312 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
1317 fm_local->fm_start = lun_start;
1318 fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
1319 memcpy(&fmkey->lfik_fiemap, fm_local,
1321 *buflen = fiemap_count_to_size(
1322 fm_local->fm_extent_count);
1324 rc = cl_object_fiemap(env, subobj, fmkey, fm_local,
1329 ext_count = fm_local->fm_mapped_extents;
1330 if (ext_count == 0) {
1332 /* If last stripe has hold at the end,
1333 * we need to return */
1334 if (cur_stripe_wrap == last_stripe) {
1335 fiemap->fm_mapped_extents = 0;
1339 } else if (enough) {
1341 * We've collected enough extents and there are
1342 * more extents after it.
1347 /* If we just need num of extents, got to next device */
1348 if (fiemap->fm_extent_count == 0) {
1349 current_extent += ext_count;
1353 /* prepare to copy retrived map extents */
1354 len_mapped_single_call =
1355 lcl_fm_ext[ext_count - 1].fe_logical -
1356 lun_start + lcl_fm_ext[ext_count - 1].fe_length;
1358 /* Have we finished mapping on this device? */
1359 if (req_fm_len <= len_mapped_single_call)
1362 /* Clear the EXTENT_LAST flag which can be present on
1363 * the last extent */
1364 if (lcl_fm_ext[ext_count - 1].fe_flags &
1366 lcl_fm_ext[ext_count - 1].fe_flags &=
1367 ~FIEMAP_EXTENT_LAST;
1368 if (lov_stripe_size(lsm,
1369 lcl_fm_ext[ext_count - 1].fe_logical +
1370 lcl_fm_ext[ext_count - 1].fe_length,
1371 cur_stripe) >= fmkey->lfik_oa.o_size)
1374 fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
1375 ost_index, ext_count,
1377 current_extent += ext_count;
1379 /* Ran out of available extents? */
1380 if (current_extent >= fiemap->fm_extent_count)
1382 } while (!ost_done && !ost_eof);
1384 cl_object_put(env, subobj);
1387 if (cur_stripe_wrap == last_stripe)
1389 } /* for each stripe */
1391 /* Indicate that we are returning device offsets unless file just has
1393 if (lsm->lsm_stripe_count > 1)
1394 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
1396 if (fiemap->fm_extent_count == 0)
1397 goto skip_last_device_calc;
1399 /* Check if we have reached the last stripe and whether mapping for that
1400 * stripe is done. */
1401 if ((cur_stripe_wrap == last_stripe) && (ost_done || ost_eof))
1402 fiemap->fm_extents[current_extent - 1].fe_flags |=
1404 skip_last_device_calc:
1405 fiemap->fm_mapped_extents = current_extent;
1408 cl_object_put(env, subobj);
1410 OBD_FREE_LARGE(fm_local, buffer_size);
1418 static int lov_object_getstripe(const struct lu_env *env, struct cl_object *obj,
1419 struct lov_user_md __user *lum)
1421 struct lov_object *lov = cl2lov(obj);
1422 struct lov_stripe_md *lsm;
1426 lsm = lov_lsm_addref(lov);
1430 rc = lov_getstripe(cl2lov(obj), lsm, lum);
1435 static int lov_object_layout_get(const struct lu_env *env,
1436 struct cl_object *obj,
1437 struct cl_layout *cl)
1439 struct lov_object *lov = cl2lov(obj);
1440 struct lov_stripe_md *lsm = lov_lsm_addref(lov);
1441 struct lu_buf *buf = &cl->cl_buf;
1447 cl->cl_layout_gen = CL_LAYOUT_GEN_EMPTY;
1452 cl->cl_size = lov_mds_md_size(lsm->lsm_stripe_count, lsm->lsm_magic);
1453 cl->cl_layout_gen = lsm->lsm_layout_gen;
1455 rc = lov_lsm_pack(lsm, buf->lb_buf, buf->lb_len);
1458 RETURN(rc < 0 ? rc : 0);
1461 static loff_t lov_object_maxbytes(struct cl_object *obj)
1463 struct lov_object *lov = cl2lov(obj);
1464 struct lov_stripe_md *lsm = lov_lsm_addref(lov);
1470 maxbytes = lsm->lsm_maxbytes;
1477 static const struct cl_object_operations lov_ops = {
1478 .coo_page_init = lov_page_init,
1479 .coo_lock_init = lov_lock_init,
1480 .coo_io_init = lov_io_init,
1481 .coo_attr_get = lov_attr_get,
1482 .coo_attr_update = lov_attr_update,
1483 .coo_conf_set = lov_conf_set,
1484 .coo_getstripe = lov_object_getstripe,
1485 .coo_layout_get = lov_object_layout_get,
1486 .coo_maxbytes = lov_object_maxbytes,
1487 .coo_fiemap = lov_object_fiemap,
1490 static const struct lu_object_operations lov_lu_obj_ops = {
1491 .loo_object_init = lov_object_init,
1492 .loo_object_delete = lov_object_delete,
1493 .loo_object_release = NULL,
1494 .loo_object_free = lov_object_free,
1495 .loo_object_print = lov_object_print,
1496 .loo_object_invariant = NULL
1499 struct lu_object *lov_object_alloc(const struct lu_env *env,
1500 const struct lu_object_header *unused,
1501 struct lu_device *dev)
1503 struct lov_object *lov;
1504 struct lu_object *obj;
1507 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, GFP_NOFS);
1510 lu_object_init(obj, NULL, dev);
1511 lov->lo_cl.co_ops = &lov_ops;
1512 lov->lo_type = -1; /* invalid, to catch uninitialized type */
1514 * object io operation vector (cl_object::co_iop) is installed
1515 * later in lov_object_init(), as different vectors are used
1516 * for object with different layouts.
1518 obj->lo_ops = &lov_lu_obj_ops;
1524 struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
1526 struct lov_stripe_md *lsm = NULL;
1528 lov_conf_freeze(lov);
1529 if (lov->lo_lsm != NULL) {
1530 lsm = lsm_addref(lov->lo_lsm);
1531 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
1532 lsm, atomic_read(&lsm->lsm_refc),
1533 lov->lo_layout_invalid, current);
1539 int lov_read_and_clear_async_rc(struct cl_object *clob)
1541 struct lu_object *luobj;
1545 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
1547 if (luobj != NULL) {
1548 struct lov_object *lov = lu2lov(luobj);
1550 lov_conf_freeze(lov);
1551 switch (lov->lo_type) {
1553 struct lov_stripe_md *lsm;
1557 LASSERT(lsm != NULL);
1558 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1559 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1561 if (lov_oinfo_is_dummy(loi))
1564 if (loi->loi_ar.ar_rc && !rc)
1565 rc = loi->loi_ar.ar_rc;
1566 loi->loi_ar.ar_rc = 0;
1579 EXPORT_SYMBOL(lov_read_and_clear_async_rc);