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,
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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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, 2012, 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"
45 #include <lustre_debug.h>
51 /*****************************************************************************
57 struct lov_layout_operations {
58 int (*llo_init)(const struct lu_env *env, struct lov_device *dev,
59 struct lov_object *lov,
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 void (*llo_install)(const struct lu_env *env, struct lov_object *lov,
67 union lov_layout_state *state);
68 int (*llo_print)(const struct lu_env *env, void *cookie,
69 lu_printer_t p, const struct lu_object *o);
70 struct cl_page *(*llo_page_init)(const struct lu_env *env,
71 struct cl_object *obj,
74 int (*llo_lock_init)(const struct lu_env *env,
75 struct cl_object *obj, struct cl_lock *lock,
76 const struct cl_io *io);
77 int (*llo_io_init)(const struct lu_env *env,
78 struct cl_object *obj, struct cl_io *io);
79 int (*llo_getattr)(const struct lu_env *env, struct cl_object *obj,
80 struct cl_attr *attr);
83 /*****************************************************************************
85 * Lov object layout operations.
89 static void lov_install_empty(const struct lu_env *env,
90 struct lov_object *lov,
91 union lov_layout_state *state)
94 * File without objects.
98 static int lov_init_empty(const struct lu_env *env,
99 struct lov_device *dev, struct lov_object *lov,
100 const struct cl_object_conf *conf,
101 union lov_layout_state *state)
106 static void lov_install_raid0(const struct lu_env *env,
107 struct lov_object *lov,
108 union lov_layout_state *state)
112 static struct cl_object *lov_sub_find(const struct lu_env *env,
113 struct cl_device *dev,
114 const struct lu_fid *fid,
115 const struct cl_object_conf *conf)
120 o = lu_object_find_at(env, cl2lu_dev(dev), fid, &conf->coc_lu);
121 LASSERT(ergo(!IS_ERR(o), o->lo_dev->ld_type == &lovsub_device_type));
125 static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
126 struct cl_object *stripe,
127 struct lov_layout_raid0 *r0, int idx)
129 struct cl_object_header *hdr;
130 struct cl_object_header *subhdr;
131 struct cl_object_header *parent;
132 struct lov_oinfo *oinfo;
135 if (OBD_FAIL_CHECK(OBD_FAIL_LOV_INIT)) {
136 cl_object_put(env, stripe);
140 hdr = cl_object_header(lov2cl(lov));
141 subhdr = cl_object_header(stripe);
142 parent = subhdr->coh_parent;
144 oinfo = lov->lo_lsm->lsm_oinfo[idx];
145 CDEBUG(D_INODE, DFID"@%p[%d] -> "DFID"@%p: id: "LPU64" seq: "LPU64
146 " idx: %d gen: %d\n",
147 PFID(&subhdr->coh_lu.loh_fid), subhdr, idx,
148 PFID(&hdr->coh_lu.loh_fid), hdr,
149 oinfo->loi_id, oinfo->loi_seq,
150 oinfo->loi_ost_idx, oinfo->loi_ost_gen);
152 if (parent == NULL) {
153 subhdr->coh_parent = hdr;
154 subhdr->coh_nesting = hdr->coh_nesting + 1;
155 lu_object_ref_add(&stripe->co_lu, "lov-parent", lov);
156 r0->lo_sub[idx] = cl2lovsub(stripe);
157 r0->lo_sub[idx]->lso_super = lov;
158 r0->lo_sub[idx]->lso_index = idx;
161 CERROR("Stripe is already owned by other file (%d).\n", idx);
162 LU_OBJECT_DEBUG(D_ERROR, env, &stripe->co_lu, "\n");
163 LU_OBJECT_DEBUG(D_ERROR, env, lu_object_top(&parent->coh_lu),
165 LU_OBJECT_HEADER(D_ERROR, env, lov2lu(lov), "new\n");
166 cl_object_put(env, stripe);
172 static int lov_init_raid0(const struct lu_env *env,
173 struct lov_device *dev, struct lov_object *lov,
174 const struct cl_object_conf *conf,
175 union lov_layout_state *state)
180 struct cl_object *stripe;
181 struct lov_thread_info *lti = lov_env_info(env);
182 struct cl_object_conf *subconf = <i->lti_stripe_conf;
183 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
184 struct lu_fid *ofid = <i->lti_fid;
185 struct lov_layout_raid0 *r0 = &state->raid0;
189 if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3) {
190 dump_lsm(D_ERROR, lsm);
191 LASSERTF(0, "magic mismatch, expected %d/%d, actual %d.\n",
192 LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
195 LASSERT(lov->lo_lsm == NULL);
196 lov->lo_lsm = lsm_addref(lsm);
197 r0->lo_nr = lsm->lsm_stripe_count;
198 LASSERT(r0->lo_nr <= lov_targets_nr(dev));
200 OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
201 if (r0->lo_sub != NULL) {
203 subconf->coc_inode = conf->coc_inode;
204 spin_lock_init(&r0->lo_sub_lock);
206 * Create stripe cl_objects.
208 for (i = 0; i < r0->lo_nr && result == 0; ++i) {
209 struct cl_device *subdev;
210 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
211 int ost_idx = oinfo->loi_ost_idx;
213 fid_ostid_unpack(ofid, &oinfo->loi_oi,
215 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
216 subconf->u.coc_oinfo = oinfo;
217 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
218 /* In the function below, .hs_keycmp resolves to
219 * lu_obj_hop_keycmp() */
220 /* coverity[overrun-buffer-val] */
221 stripe = lov_sub_find(env, subdev, ofid, subconf);
223 result = lov_init_sub(env, lov, stripe, r0, i);
225 result = PTR_ERR(stripe);
232 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
233 union lov_layout_state *state)
235 LASSERT(lov->lo_type == LLT_EMPTY);
236 cl_object_prune(env, &lov->lo_cl);
240 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
241 struct lovsub_object *los, int idx)
243 struct cl_object *sub;
244 struct lov_layout_raid0 *r0;
245 struct lu_site *site;
246 struct lu_site_bkt_data *bkt;
247 cfs_waitlink_t *waiter;
250 LASSERT(r0->lo_sub[idx] == los);
252 sub = lovsub2cl(los);
253 site = sub->co_lu.lo_dev->ld_site;
254 bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
256 cl_object_kill(env, sub);
257 /* release a reference to the sub-object and ... */
258 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
259 cl_object_put(env, sub);
261 /* ... wait until it is actually destroyed---sub-object clears its
262 * ->lo_sub[] slot in lovsub_object_fini() */
263 if (r0->lo_sub[idx] == los) {
264 waiter = &lov_env_info(env)->lti_waiter;
265 cfs_waitlink_init(waiter);
266 cfs_waitq_add(&bkt->lsb_marche_funebre, waiter);
267 cfs_set_current_state(CFS_TASK_UNINT);
269 /* this wait-queue is signaled at the end of
270 * lu_object_free(). */
271 cfs_set_current_state(CFS_TASK_UNINT);
272 spin_lock(&r0->lo_sub_lock);
273 if (r0->lo_sub[idx] == los) {
274 spin_unlock(&r0->lo_sub_lock);
275 cfs_waitq_wait(waiter, CFS_TASK_UNINT);
277 spin_unlock(&r0->lo_sub_lock);
278 cfs_set_current_state(CFS_TASK_RUNNING);
282 cfs_waitq_del(&bkt->lsb_marche_funebre, waiter);
284 LASSERT(r0->lo_sub[idx] == NULL);
287 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
288 union lov_layout_state *state)
290 struct lov_layout_raid0 *r0 = &state->raid0;
291 struct lov_stripe_md *lsm = lov->lo_lsm;
296 dump_lsm(D_INODE, lsm);
297 if (lov->lo_lsm_invalid && cfs_atomic_read(&lsm->lsm_refc) > 1)
300 if (r0->lo_sub != NULL) {
301 for (i = 0; i < r0->lo_nr; ++i) {
302 struct lovsub_object *los = r0->lo_sub[i];
305 cl_locks_prune(env, &los->lso_cl, 1);
307 * If top-level object is to be evicted from
308 * the cache, so are its sub-objects.
310 lov_subobject_kill(env, lov, los, i);
317 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
318 union lov_layout_state *state)
320 LASSERT(lov->lo_type == LLT_EMPTY);
323 static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
324 union lov_layout_state *state)
326 struct lov_layout_raid0 *r0 = &state->raid0;
329 if (r0->lo_sub != NULL) {
330 OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
334 dump_lsm(D_INODE, lov->lo_lsm);
335 lov_free_memmd(&lov->lo_lsm);
340 static int lov_print_empty(const struct lu_env *env, void *cookie,
341 lu_printer_t p, const struct lu_object *o)
343 (*p)(env, cookie, "empty\n");
347 static int lov_print_raid0(const struct lu_env *env, void *cookie,
348 lu_printer_t p, const struct lu_object *o)
350 struct lov_object *lov = lu2lov(o);
351 struct lov_layout_raid0 *r0 = lov_r0(lov);
354 (*p)(env, cookie, "stripes: %d:\n", r0->lo_nr);
355 for (i = 0; i < r0->lo_nr; ++i) {
356 struct lu_object *sub;
358 if (r0->lo_sub[i] != NULL) {
359 sub = lovsub2lu(r0->lo_sub[i]);
360 lu_object_print(env, cookie, p, sub);
362 (*p)(env, cookie, "sub %d absent\n", i);
368 * Implements cl_object_operations::coo_attr_get() method for an object
369 * without stripes (LLT_EMPTY layout type).
371 * The only attributes this layer is authoritative in this case is
372 * cl_attr::cat_blocks---it's 0.
374 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
375 struct cl_attr *attr)
377 attr->cat_blocks = 0;
381 static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
382 struct cl_attr *attr)
384 struct lov_object *lov = cl2lov(obj);
385 struct lov_layout_raid0 *r0 = lov_r0(lov);
386 struct lov_stripe_md *lsm = lov->lo_lsm;
387 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
393 /* this is called w/o holding type guard mutex, so it must be inside
394 * an on going IO otherwise lsm may be replaced.
395 * LU-2117: it turns out there exists one exception. For mmaped files,
396 * the lock of those files may be requested in the other file's IO
397 * context, and this function is called in ccc_lock_state(), it will
398 * hit this assertion.
399 * Anyway, it's still okay to call attr_get w/o type guard as layout
400 * can't go if locks exist. */
401 /* LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 1); */
403 if (!r0->lo_attr_valid) {
405 * Fill LVB with attributes already initialized by the upper
408 cl_attr2lvb(lvb, attr);
412 * XXX that should be replaced with a loop over sub-objects,
413 * doing cl_object_attr_get() on them. But for now, let's
414 * reuse old lov code.
418 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
419 * happy. It's not needed, because new code uses
420 * ->coh_attr_guard spin-lock to protect consistency of
421 * sub-object attributes.
423 lov_stripe_lock(lsm);
424 result = lov_merge_lvb_kms(lsm, lvb, &kms);
425 lov_stripe_unlock(lsm);
427 cl_lvb2attr(attr, lvb);
429 r0->lo_attr_valid = 1;
437 const static struct lov_layout_operations lov_dispatch[] = {
439 .llo_init = lov_init_empty,
440 .llo_delete = lov_delete_empty,
441 .llo_fini = lov_fini_empty,
442 .llo_install = lov_install_empty,
443 .llo_print = lov_print_empty,
444 .llo_page_init = lov_page_init_empty,
445 .llo_lock_init = lov_lock_init_empty,
446 .llo_io_init = lov_io_init_empty,
447 .llo_getattr = lov_attr_get_empty
450 .llo_init = lov_init_raid0,
451 .llo_delete = lov_delete_raid0,
452 .llo_fini = lov_fini_raid0,
453 .llo_install = lov_install_raid0,
454 .llo_print = lov_print_raid0,
455 .llo_page_init = lov_page_init_raid0,
456 .llo_lock_init = lov_lock_init_raid0,
457 .llo_io_init = lov_io_init_raid0,
458 .llo_getattr = lov_attr_get_raid0
464 * Performs a double-dispatch based on the layout type of an object.
466 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
468 struct lov_object *__obj = (obj); \
469 enum lov_layout_type __llt; \
471 __llt = __obj->lo_type; \
472 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
473 lov_dispatch[__llt].op(__VA_ARGS__); \
476 static inline void lov_conf_freeze(struct lov_object *lov)
478 if (lov->lo_owner != cfs_current())
479 down_read(&lov->lo_type_guard);
482 static inline void lov_conf_thaw(struct lov_object *lov)
484 if (lov->lo_owner != cfs_current())
485 up_read(&lov->lo_type_guard);
488 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
490 struct lov_object *__obj = (obj); \
491 int __lock = !!(lock); \
492 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
495 lov_conf_freeze(__obj); \
496 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
498 lov_conf_thaw(__obj); \
503 * Performs a locked double-dispatch based on the layout type of an object.
505 #define LOV_2DISPATCH(obj, op, ...) \
506 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
508 #define LOV_2DISPATCH_VOID(obj, op, ...) \
510 struct lov_object *__obj = (obj); \
511 enum lov_layout_type __llt; \
513 lov_conf_freeze(__obj); \
514 __llt = __obj->lo_type; \
515 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
516 lov_dispatch[__llt].op(__VA_ARGS__); \
517 lov_conf_thaw(__obj); \
520 static void lov_conf_lock(struct lov_object *lov)
522 LASSERT(lov->lo_owner != cfs_current());
523 down_write(&lov->lo_type_guard);
524 LASSERT(lov->lo_owner == NULL);
525 lov->lo_owner = cfs_current();
528 static void lov_conf_unlock(struct lov_object *lov)
530 lov->lo_owner = NULL;
531 up_write(&lov->lo_type_guard);
534 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
536 struct l_wait_info lwi = { 0 };
537 struct lov_stripe_md *lsm = lov->lo_lsm;
540 if (!lov->lo_lsm_invalid || lsm == NULL)
543 LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 0);
544 while (cfs_atomic_read(&lsm->lsm_refc) > 1) {
545 lov_conf_unlock(lov);
546 l_wait_event(lov->lo_waitq,
547 cfs_atomic_read(&lsm->lsm_refc) == 1, &lwi);
553 static int lov_layout_change(const struct lu_env *unused,
554 struct lov_object *lov, enum lov_layout_type llt,
555 const struct cl_object_conf *conf)
558 union lov_layout_state *state = &lov->u;
559 const struct lov_layout_operations *old_ops;
560 const struct lov_layout_operations *new_ops;
562 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
567 LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
568 LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
571 cookie = cl_env_reenter();
572 env = cl_env_get(&refcheck);
574 cl_env_reexit(cookie);
575 RETURN(PTR_ERR(env));
578 old_ops = &lov_dispatch[lov->lo_type];
579 new_ops = &lov_dispatch[llt];
581 result = old_ops->llo_delete(env, lov, &lov->u);
583 old_ops->llo_fini(env, lov, &lov->u);
584 LASSERT(cfs_list_empty(&hdr->coh_locks));
585 LASSERT(hdr->coh_tree.rnode == NULL);
586 LASSERT(hdr->coh_pages == 0);
588 lov->lo_type = LLT_EMPTY;
589 result = new_ops->llo_init(env,
590 lu2lov_dev(lov->lo_cl.co_lu.lo_dev),
593 new_ops->llo_install(env, lov, state);
596 new_ops->llo_delete(env, lov, state);
597 new_ops->llo_fini(env, lov, state);
598 /* this file becomes an EMPTY file. */
602 cl_env_put(env, &refcheck);
603 cl_env_reexit(cookie);
607 /*****************************************************************************
609 * Lov object operations.
613 int lov_object_init(const struct lu_env *env, struct lu_object *obj,
614 const struct lu_object_conf *conf)
616 struct lov_device *dev = lu2lov_dev(obj->lo_dev);
617 struct lov_object *lov = lu2lov(obj);
618 const struct cl_object_conf *cconf = lu2cl_conf(conf);
619 union lov_layout_state *set = &lov->u;
620 const struct lov_layout_operations *ops;
624 init_rwsem(&lov->lo_type_guard);
625 cfs_waitq_init(&lov->lo_waitq);
627 /* no locking is necessary, as object is being created */
628 lov->lo_type = cconf->u.coc_md->lsm != NULL ? LLT_RAID0 : LLT_EMPTY;
629 ops = &lov_dispatch[lov->lo_type];
630 result = ops->llo_init(env, dev, lov, cconf, set);
632 ops->llo_install(env, lov, set);
636 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
637 const struct cl_object_conf *conf)
639 struct lov_stripe_md *lsm = NULL;
640 struct lov_object *lov = cl2lov(obj);
645 if (conf->coc_invalidate) {
646 lov->lo_lsm_invalid = 1;
647 GOTO(out, result = 0);
650 if (conf->u.coc_md != NULL)
651 lsm = conf->u.coc_md->lsm;
653 if ((lsm == NULL && lov->lo_lsm == NULL) ||
654 (lsm != NULL && lov->lo_lsm != NULL &&
655 lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen)) {
656 lov->lo_lsm_invalid = 0;
657 GOTO(out, result = 0);
660 /* will change layout */
661 lov_layout_wait(env, lov);
664 * Only LLT_EMPTY <-> LLT_RAID0 transitions are supported.
666 switch (lov->lo_type) {
669 result = lov_layout_change(env, lov, LLT_RAID0, conf);
673 result = lov_layout_change(env, lov, LLT_EMPTY, conf);
674 else if (lov_stripe_md_cmp(lov->lo_lsm, lsm))
675 result = -EOPNOTSUPP;
680 lov->lo_lsm_invalid = result != 0;
684 lov_conf_unlock(lov);
688 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
690 struct lov_object *lov = lu2lov(obj);
693 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
697 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
699 struct lov_object *lov = lu2lov(obj);
702 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
704 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
708 static int lov_object_print(const struct lu_env *env, void *cookie,
709 lu_printer_t p, const struct lu_object *o)
711 return LOV_2DISPATCH(lu2lov(o), llo_print, env, cookie, p, o);
714 struct cl_page *lov_page_init(const struct lu_env *env, struct cl_object *obj,
715 struct cl_page *page, cfs_page_t *vmpage)
717 return LOV_2DISPATCH_NOLOCK(cl2lov(obj),
718 llo_page_init, env, obj, page, vmpage);
722 * Implements cl_object_operations::clo_io_init() method for lov
723 * layer. Dispatches to the appropriate layout io initialization method.
725 int lov_io_init(const struct lu_env *env, struct cl_object *obj,
728 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
729 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
730 !io->ci_ignore_layout, env, obj, io);
734 * An implementation of cl_object_operations::clo_attr_get() method for lov
735 * layer. For raid0 layout this collects and merges attributes of all
738 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
739 struct cl_attr *attr)
741 /* do not take lock, as this function is called under a
742 * spin-lock. Layout is protected from changing by ongoing IO. */
743 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
746 static int lov_attr_set(const struct lu_env *env, struct cl_object *obj,
747 const struct cl_attr *attr, unsigned valid)
750 * No dispatch is required here, as no layout implements this.
755 int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
756 struct cl_lock *lock, const struct cl_io *io)
758 /* No need to lock because we've taken one refcount of layout. */
759 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
763 static const struct cl_object_operations lov_ops = {
764 .coo_page_init = lov_page_init,
765 .coo_lock_init = lov_lock_init,
766 .coo_io_init = lov_io_init,
767 .coo_attr_get = lov_attr_get,
768 .coo_attr_set = lov_attr_set,
769 .coo_conf_set = lov_conf_set
772 static const struct lu_object_operations lov_lu_obj_ops = {
773 .loo_object_init = lov_object_init,
774 .loo_object_delete = lov_object_delete,
775 .loo_object_release = NULL,
776 .loo_object_free = lov_object_free,
777 .loo_object_print = lov_object_print,
778 .loo_object_invariant = NULL
781 struct lu_object *lov_object_alloc(const struct lu_env *env,
782 const struct lu_object_header *unused,
783 struct lu_device *dev)
785 struct lov_object *lov;
786 struct lu_object *obj;
789 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, CFS_ALLOC_IO);
792 lu_object_init(obj, NULL, dev);
793 lov->lo_cl.co_ops = &lov_ops;
794 lov->lo_type = -1; /* invalid, to catch uninitialized type */
796 * object io operation vector (cl_object::co_iop) is installed
797 * later in lov_object_init(), as different vectors are used
798 * for object with different layouts.
800 obj->lo_ops = &lov_lu_obj_ops;
806 struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
808 struct lov_stripe_md *lsm = NULL;
810 lov_conf_freeze(lov);
811 if (lov->lo_lsm != NULL) {
812 lsm = lsm_addref(lov->lo_lsm);
813 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
814 lsm, cfs_atomic_read(&lsm->lsm_refc),
815 lov->lo_lsm_invalid, cfs_current());
821 void lov_lsm_decref(struct lov_object *lov, struct lov_stripe_md *lsm)
826 CDEBUG(D_INODE, "lsm %p decref %d by %p.\n",
827 lsm, cfs_atomic_read(&lsm->lsm_refc), cfs_current());
829 if (lov_free_memmd(&lsm) <= 1 && lov->lo_lsm_invalid)
830 cfs_waitq_signal(&lov->lo_waitq);
833 struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
835 struct lu_object *luobj;
836 struct lov_stripe_md *lsm = NULL;
841 luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
844 lsm = lov_lsm_addref(lu2lov(luobj));
847 EXPORT_SYMBOL(lov_lsm_get);
849 void lov_lsm_put(struct cl_object *clobj, struct lov_stripe_md *lsm)
851 struct lu_object *luobj;
853 if (clobj == NULL || lsm == NULL)
856 luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
858 LASSERT(luobj != NULL);
860 lov_lsm_decref(lu2lov(luobj), lsm);
862 EXPORT_SYMBOL(lov_lsm_put);
864 int lov_read_and_clear_async_rc(struct cl_object *clob)
866 struct lu_object *luobj;
870 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
873 struct lov_object *lov = lu2lov(luobj);
875 lov_conf_freeze(lov);
876 switch (lov->lo_type) {
878 struct lov_stripe_md *lsm;
882 LASSERT(lsm != NULL);
883 for (i = 0; i < lsm->lsm_stripe_count; i++) {
884 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
885 if (loi->loi_ar.ar_rc && !rc)
886 rc = loi->loi_ar.ar_rc;
887 loi->loi_ar.ar_rc = 0;
899 EXPORT_SYMBOL(lov_read_and_clear_async_rc);