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).
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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, 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 int (*llo_page_init)(const struct lu_env *env, struct cl_object *obj,
71 struct cl_page *page, cfs_page_t *vmpage);
72 int (*llo_lock_init)(const struct lu_env *env,
73 struct cl_object *obj, struct cl_lock *lock,
74 const struct cl_io *io);
75 int (*llo_io_init)(const struct lu_env *env,
76 struct cl_object *obj, struct cl_io *io);
77 int (*llo_getattr)(const struct lu_env *env, struct cl_object *obj,
78 struct cl_attr *attr);
81 /*****************************************************************************
83 * Lov object layout operations.
87 static void lov_install_empty(const struct lu_env *env,
88 struct lov_object *lov,
89 union lov_layout_state *state)
92 * File without objects.
96 static int lov_init_empty(const struct lu_env *env,
97 struct lov_device *dev, struct lov_object *lov,
98 const struct cl_object_conf *conf,
99 union lov_layout_state *state)
104 static void lov_install_raid0(const struct lu_env *env,
105 struct lov_object *lov,
106 union lov_layout_state *state)
110 static struct cl_object *lov_sub_find(const struct lu_env *env,
111 struct cl_device *dev,
112 const struct lu_fid *fid,
113 const struct cl_object_conf *conf)
118 o = lu_object_find_at(env, cl2lu_dev(dev), fid, &conf->coc_lu);
119 LASSERT(ergo(!IS_ERR(o), o->lo_dev->ld_type == &lovsub_device_type));
123 static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
124 struct cl_object *stripe,
125 struct lov_layout_raid0 *r0, int idx)
127 struct cl_object_header *hdr;
128 struct cl_object_header *subhdr;
129 struct cl_object_header *parent;
130 struct lov_oinfo *oinfo;
133 if (OBD_FAIL_CHECK(OBD_FAIL_LOV_INIT)) {
134 /* For sanity:test_206.
135 * Do not leave the object in cache to avoid accessing
136 * freed memory. This is because osc_object is referring to
137 * lov_oinfo of lsm_stripe_data which will be freed due to
139 cl_object_kill(env, stripe);
140 cl_object_put(env, stripe);
144 hdr = cl_object_header(lov2cl(lov));
145 subhdr = cl_object_header(stripe);
146 parent = subhdr->coh_parent;
148 oinfo = lov->lo_lsm->lsm_oinfo[idx];
149 CDEBUG(D_INODE, DFID"@%p[%d] -> "DFID"@%p: id: "LPU64" seq: "LPU64
150 " idx: %d gen: %d\n",
151 PFID(&subhdr->coh_lu.loh_fid), subhdr, idx,
152 PFID(&hdr->coh_lu.loh_fid), hdr,
153 oinfo->loi_id, oinfo->loi_seq,
154 oinfo->loi_ost_idx, oinfo->loi_ost_gen);
156 if (parent == NULL) {
157 subhdr->coh_parent = hdr;
158 subhdr->coh_nesting = hdr->coh_nesting + 1;
159 lu_object_ref_add(&stripe->co_lu, "lov-parent", lov);
160 r0->lo_sub[idx] = cl2lovsub(stripe);
161 r0->lo_sub[idx]->lso_super = lov;
162 r0->lo_sub[idx]->lso_index = idx;
165 CERROR("Stripe is already owned by other file (%d).\n", idx);
166 LU_OBJECT_DEBUG(D_ERROR, env, &stripe->co_lu, "\n");
167 LU_OBJECT_DEBUG(D_ERROR, env, lu_object_top(&parent->coh_lu),
169 LU_OBJECT_HEADER(D_ERROR, env, lov2lu(lov), "new\n");
170 cl_object_put(env, stripe);
176 static int lov_init_raid0(const struct lu_env *env,
177 struct lov_device *dev, struct lov_object *lov,
178 const struct cl_object_conf *conf,
179 union lov_layout_state *state)
184 struct cl_object *stripe;
185 struct lov_thread_info *lti = lov_env_info(env);
186 struct cl_object_conf *subconf = <i->lti_stripe_conf;
187 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
188 struct lu_fid *ofid = <i->lti_fid;
189 struct lov_layout_raid0 *r0 = &state->raid0;
193 if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3) {
194 dump_lsm(D_ERROR, lsm);
195 LASSERTF(0, "magic mismatch, expected %d/%d, actual %d.\n",
196 LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
199 LASSERT(lov->lo_lsm == NULL);
200 lov->lo_lsm = lsm_addref(lsm);
201 r0->lo_nr = lsm->lsm_stripe_count;
202 LASSERT(r0->lo_nr <= lov_targets_nr(dev));
204 OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
205 if (r0->lo_sub != NULL) {
207 subconf->coc_inode = conf->coc_inode;
208 spin_lock_init(&r0->lo_sub_lock);
210 * Create stripe cl_objects.
212 for (i = 0; i < r0->lo_nr && result == 0; ++i) {
213 struct cl_device *subdev;
214 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
215 int ost_idx = oinfo->loi_ost_idx;
217 fid_ostid_unpack(ofid, &oinfo->loi_oi,
219 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
220 subconf->u.coc_oinfo = oinfo;
221 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
222 /* In the function below, .hs_keycmp resolves to
223 * lu_obj_hop_keycmp() */
224 /* coverity[overrun-buffer-val] */
225 stripe = lov_sub_find(env, subdev, ofid, subconf);
227 result = lov_init_sub(env, lov, stripe, r0, i);
229 result = PTR_ERR(stripe);
236 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
237 union lov_layout_state *state)
239 LASSERT(lov->lo_type == LLT_EMPTY);
240 if (cfs_atomic_read(&lov->lo_active_ios) > 0)
243 cl_object_prune(env, &lov->lo_cl);
247 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
248 struct lovsub_object *los, int idx)
250 struct cl_object *sub;
251 struct lov_layout_raid0 *r0;
252 struct lu_site *site;
253 struct lu_site_bkt_data *bkt;
254 cfs_waitlink_t *waiter;
257 LASSERT(r0->lo_sub[idx] == los);
259 sub = lovsub2cl(los);
260 site = sub->co_lu.lo_dev->ld_site;
261 bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
263 cl_object_kill(env, sub);
264 /* release a reference to the sub-object and ... */
265 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
266 cl_object_put(env, sub);
268 /* ... wait until it is actually destroyed---sub-object clears its
269 * ->lo_sub[] slot in lovsub_object_fini() */
270 if (r0->lo_sub[idx] == los) {
271 waiter = &lov_env_info(env)->lti_waiter;
272 cfs_waitlink_init(waiter);
273 cfs_waitq_add(&bkt->lsb_marche_funebre, waiter);
274 cfs_set_current_state(CFS_TASK_UNINT);
276 /* this wait-queue is signaled at the end of
277 * lu_object_free(). */
278 cfs_set_current_state(CFS_TASK_UNINT);
279 spin_lock(&r0->lo_sub_lock);
280 if (r0->lo_sub[idx] == los) {
281 spin_unlock(&r0->lo_sub_lock);
282 cfs_waitq_wait(waiter, CFS_TASK_UNINT);
284 spin_unlock(&r0->lo_sub_lock);
285 cfs_set_current_state(CFS_TASK_RUNNING);
289 cfs_waitq_del(&bkt->lsb_marche_funebre, waiter);
291 LASSERT(r0->lo_sub[idx] == NULL);
294 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
295 union lov_layout_state *state)
297 struct lov_layout_raid0 *r0 = &state->raid0;
298 struct lov_stripe_md *lsm = lov->lo_lsm;
303 dump_lsm(D_INODE, lsm);
304 if (cfs_atomic_read(&lov->lo_active_ios) > 0)
307 if (r0->lo_sub != NULL) {
308 for (i = 0; i < r0->lo_nr; ++i) {
309 struct lovsub_object *los = r0->lo_sub[i];
312 cl_locks_prune(env, &los->lso_cl, 1);
314 * If top-level object is to be evicted from
315 * the cache, so are its sub-objects.
317 lov_subobject_kill(env, lov, los, i);
321 cl_object_prune(env, &lov->lo_cl);
325 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
326 union lov_layout_state *state)
328 LASSERT(lov->lo_type == LLT_EMPTY);
331 static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
332 union lov_layout_state *state)
334 struct lov_layout_raid0 *r0 = &state->raid0;
337 if (r0->lo_sub != NULL) {
338 OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
342 dump_lsm(D_INODE, lov->lo_lsm);
343 lov_free_memmd(&lov->lo_lsm);
348 static int lov_print_empty(const struct lu_env *env, void *cookie,
349 lu_printer_t p, const struct lu_object *o)
351 (*p)(env, cookie, "empty\n");
355 static int lov_print_raid0(const struct lu_env *env, void *cookie,
356 lu_printer_t p, const struct lu_object *o)
358 struct lov_object *lov = lu2lov(o);
359 struct lov_layout_raid0 *r0 = lov_r0(lov);
362 (*p)(env, cookie, "stripes: %d:\n", r0->lo_nr);
363 for (i = 0; i < r0->lo_nr; ++i) {
364 struct lu_object *sub;
366 if (r0->lo_sub[i] != NULL) {
367 sub = lovsub2lu(r0->lo_sub[i]);
368 lu_object_print(env, cookie, p, sub);
370 (*p)(env, cookie, "sub %d absent\n", i);
376 * Implements cl_object_operations::coo_attr_get() method for an object
377 * without stripes (LLT_EMPTY layout type).
379 * The only attributes this layer is authoritative in this case is
380 * cl_attr::cat_blocks---it's 0.
382 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
383 struct cl_attr *attr)
385 attr->cat_blocks = 0;
389 static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
390 struct cl_attr *attr)
392 struct lov_object *lov = cl2lov(obj);
393 struct lov_layout_raid0 *r0 = lov_r0(lov);
394 struct lov_stripe_md *lsm = lov->lo_lsm;
395 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
401 /* this is called w/o holding type guard mutex, so it must be inside
402 * an on going IO otherwise lsm may be replaced.
403 * LU-2117: it turns out there exists one exception. For mmaped files,
404 * the lock of those files may be requested in the other file's IO
405 * context, and this function is called in ccc_lock_state(), it will
406 * hit this assertion.
407 * Anyway, it's still okay to call attr_get w/o type guard as layout
408 * can't go if locks exist. */
409 /* LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 1); */
411 if (!r0->lo_attr_valid) {
413 * Fill LVB with attributes already initialized by the upper
416 cl_attr2lvb(lvb, attr);
420 * XXX that should be replaced with a loop over sub-objects,
421 * doing cl_object_attr_get() on them. But for now, let's
422 * reuse old lov code.
426 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
427 * happy. It's not needed, because new code uses
428 * ->coh_attr_guard spin-lock to protect consistency of
429 * sub-object attributes.
431 lov_stripe_lock(lsm);
432 result = lov_merge_lvb_kms(lsm, lvb, &kms);
433 lov_stripe_unlock(lsm);
435 cl_lvb2attr(attr, lvb);
437 r0->lo_attr_valid = 1;
445 const static struct lov_layout_operations lov_dispatch[] = {
447 .llo_init = lov_init_empty,
448 .llo_delete = lov_delete_empty,
449 .llo_fini = lov_fini_empty,
450 .llo_install = lov_install_empty,
451 .llo_print = lov_print_empty,
452 .llo_page_init = lov_page_init_empty,
453 .llo_lock_init = lov_lock_init_empty,
454 .llo_io_init = lov_io_init_empty,
455 .llo_getattr = lov_attr_get_empty
458 .llo_init = lov_init_raid0,
459 .llo_delete = lov_delete_raid0,
460 .llo_fini = lov_fini_raid0,
461 .llo_install = lov_install_raid0,
462 .llo_print = lov_print_raid0,
463 .llo_page_init = lov_page_init_raid0,
464 .llo_lock_init = lov_lock_init_raid0,
465 .llo_io_init = lov_io_init_raid0,
466 .llo_getattr = lov_attr_get_raid0
472 * Performs a double-dispatch based on the layout type of an object.
474 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
476 struct lov_object *__obj = (obj); \
477 enum lov_layout_type __llt; \
479 __llt = __obj->lo_type; \
480 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
481 lov_dispatch[__llt].op(__VA_ARGS__); \
484 static inline void lov_conf_freeze(struct lov_object *lov)
486 if (lov->lo_owner != cfs_current())
487 down_read(&lov->lo_type_guard);
490 static inline void lov_conf_thaw(struct lov_object *lov)
492 if (lov->lo_owner != cfs_current())
493 up_read(&lov->lo_type_guard);
496 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
498 struct lov_object *__obj = (obj); \
499 int __lock = !!(lock); \
500 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
503 lov_conf_freeze(__obj); \
504 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
506 lov_conf_thaw(__obj); \
511 * Performs a locked double-dispatch based on the layout type of an object.
513 #define LOV_2DISPATCH(obj, op, ...) \
514 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
516 #define LOV_2DISPATCH_VOID(obj, op, ...) \
518 struct lov_object *__obj = (obj); \
519 enum lov_layout_type __llt; \
521 lov_conf_freeze(__obj); \
522 __llt = __obj->lo_type; \
523 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
524 lov_dispatch[__llt].op(__VA_ARGS__); \
525 lov_conf_thaw(__obj); \
528 static void lov_conf_lock(struct lov_object *lov)
530 LASSERT(lov->lo_owner != cfs_current());
531 down_write(&lov->lo_type_guard);
532 LASSERT(lov->lo_owner == NULL);
533 lov->lo_owner = cfs_current();
536 static void lov_conf_unlock(struct lov_object *lov)
538 lov->lo_owner = NULL;
539 up_write(&lov->lo_type_guard);
542 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
544 struct l_wait_info lwi = { 0 };
547 if (!lov->lo_layout_invalid)
550 while (cfs_atomic_read(&lov->lo_active_ios) > 0) {
551 lov_conf_unlock(lov);
553 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
554 PFID(lu_object_fid(lov2lu(lov))),
555 cfs_atomic_read(&lov->lo_active_ios));
557 l_wait_event(lov->lo_waitq,
558 cfs_atomic_read(&lov->lo_active_ios) == 0, &lwi);
564 static int lov_layout_change(const struct lu_env *unused,
565 struct lov_object *lov, enum lov_layout_type llt,
566 const struct cl_object_conf *conf)
569 union lov_layout_state *state = &lov->u;
570 const struct lov_layout_operations *old_ops;
571 const struct lov_layout_operations *new_ops;
573 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
578 LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
579 LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
582 cookie = cl_env_reenter();
583 env = cl_env_get(&refcheck);
585 cl_env_reexit(cookie);
586 RETURN(PTR_ERR(env));
589 old_ops = &lov_dispatch[lov->lo_type];
590 new_ops = &lov_dispatch[llt];
592 result = old_ops->llo_delete(env, lov, &lov->u);
594 old_ops->llo_fini(env, lov, &lov->u);
596 LASSERT(cfs_atomic_read(&lov->lo_active_ios) == 0);
597 LASSERT(cfs_list_empty(&hdr->coh_locks));
598 LASSERT(hdr->coh_tree.rnode == NULL);
599 LASSERT(hdr->coh_pages == 0);
601 lov->lo_type = LLT_EMPTY;
602 result = new_ops->llo_init(env,
603 lu2lov_dev(lov->lo_cl.co_lu.lo_dev),
606 new_ops->llo_install(env, lov, state);
609 new_ops->llo_delete(env, lov, state);
610 new_ops->llo_fini(env, lov, state);
611 /* this file becomes an EMPTY file. */
615 cl_env_put(env, &refcheck);
616 cl_env_reexit(cookie);
620 /*****************************************************************************
622 * Lov object operations.
626 int lov_object_init(const struct lu_env *env, struct lu_object *obj,
627 const struct lu_object_conf *conf)
629 struct lov_device *dev = lu2lov_dev(obj->lo_dev);
630 struct lov_object *lov = lu2lov(obj);
631 const struct cl_object_conf *cconf = lu2cl_conf(conf);
632 union lov_layout_state *set = &lov->u;
633 const struct lov_layout_operations *ops;
637 init_rwsem(&lov->lo_type_guard);
638 cfs_atomic_set(&lov->lo_active_ios, 0);
639 cfs_waitq_init(&lov->lo_waitq);
641 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
643 /* no locking is necessary, as object is being created */
644 lov->lo_type = cconf->u.coc_md->lsm != NULL ? LLT_RAID0 : LLT_EMPTY;
645 ops = &lov_dispatch[lov->lo_type];
646 result = ops->llo_init(env, dev, lov, cconf, set);
648 ops->llo_install(env, lov, set);
652 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
653 const struct cl_object_conf *conf)
655 struct lov_stripe_md *lsm = NULL;
656 struct lov_object *lov = cl2lov(obj);
661 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
662 lov->lo_layout_invalid = true;
663 GOTO(out, result = 0);
666 if (conf->coc_opc == OBJECT_CONF_WAIT) {
667 result = lov_layout_wait(env, lov);
671 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
673 if (conf->u.coc_md != NULL)
674 lsm = conf->u.coc_md->lsm;
675 if ((lsm == NULL && lov->lo_lsm == NULL) ||
676 (lsm != NULL && lov->lo_lsm != NULL &&
677 lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen)) {
678 /* same version of layout */
679 lov->lo_layout_invalid = false;
680 GOTO(out, result = 0);
683 /* will change layout - check if there still exists active IO. */
684 if (cfs_atomic_read(&lov->lo_active_ios) > 1) {
685 lov->lo_layout_invalid = true;
686 GOTO(out, result = -EBUSY);
690 * Only LLT_EMPTY <-> LLT_RAID0 transitions are supported.
692 switch (lov->lo_type) {
695 result = lov_layout_change(env, lov, LLT_RAID0, conf);
699 result = lov_layout_change(env, lov, LLT_EMPTY, conf);
700 else if (lov_stripe_md_cmp(lov->lo_lsm, lsm))
701 result = -EOPNOTSUPP;
706 lov->lo_layout_invalid = result != 0;
710 lov_conf_unlock(lov);
714 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
716 struct lov_object *lov = lu2lov(obj);
719 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
723 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
725 struct lov_object *lov = lu2lov(obj);
728 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
730 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
734 static int lov_object_print(const struct lu_env *env, void *cookie,
735 lu_printer_t p, const struct lu_object *o)
737 return LOV_2DISPATCH(lu2lov(o), llo_print, env, cookie, p, o);
740 int lov_page_init(const struct lu_env *env, struct cl_object *obj,
741 struct cl_page *page, cfs_page_t *vmpage)
743 return LOV_2DISPATCH_NOLOCK(cl2lov(obj),
744 llo_page_init, env, obj, page, vmpage);
748 * Implements cl_object_operations::clo_io_init() method for lov
749 * layer. Dispatches to the appropriate layout io initialization method.
751 int lov_io_init(const struct lu_env *env, struct cl_object *obj,
754 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
755 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
756 !io->ci_ignore_layout, env, obj, io);
760 * An implementation of cl_object_operations::clo_attr_get() method for lov
761 * layer. For raid0 layout this collects and merges attributes of all
764 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
765 struct cl_attr *attr)
767 /* do not take lock, as this function is called under a
768 * spin-lock. Layout is protected from changing by ongoing IO. */
769 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
772 static int lov_attr_set(const struct lu_env *env, struct cl_object *obj,
773 const struct cl_attr *attr, unsigned valid)
776 * No dispatch is required here, as no layout implements this.
781 int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
782 struct cl_lock *lock, const struct cl_io *io)
784 /* No need to lock because we've taken one refcount of layout. */
785 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
789 static const struct cl_object_operations lov_ops = {
790 .coo_page_init = lov_page_init,
791 .coo_lock_init = lov_lock_init,
792 .coo_io_init = lov_io_init,
793 .coo_attr_get = lov_attr_get,
794 .coo_attr_set = lov_attr_set,
795 .coo_conf_set = lov_conf_set
798 static const struct lu_object_operations lov_lu_obj_ops = {
799 .loo_object_init = lov_object_init,
800 .loo_object_delete = lov_object_delete,
801 .loo_object_release = NULL,
802 .loo_object_free = lov_object_free,
803 .loo_object_print = lov_object_print,
804 .loo_object_invariant = NULL
807 struct lu_object *lov_object_alloc(const struct lu_env *env,
808 const struct lu_object_header *unused,
809 struct lu_device *dev)
811 struct lov_object *lov;
812 struct lu_object *obj;
815 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, CFS_ALLOC_IO);
818 lu_object_init(obj, NULL, dev);
819 lov->lo_cl.co_ops = &lov_ops;
820 lov->lo_type = -1; /* invalid, to catch uninitialized type */
822 * object io operation vector (cl_object::co_iop) is installed
823 * later in lov_object_init(), as different vectors are used
824 * for object with different layouts.
826 obj->lo_ops = &lov_lu_obj_ops;
832 struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
834 struct lov_stripe_md *lsm = NULL;
836 lov_conf_freeze(lov);
837 if (lov->lo_lsm != NULL) {
838 lsm = lsm_addref(lov->lo_lsm);
839 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
840 lsm, cfs_atomic_read(&lsm->lsm_refc),
841 lov->lo_layout_invalid, cfs_current());
847 void lov_lsm_decref(struct lov_object *lov, struct lov_stripe_md *lsm)
852 CDEBUG(D_INODE, "lsm %p decref %d by %p.\n",
853 lsm, cfs_atomic_read(&lsm->lsm_refc), cfs_current());
855 lov_free_memmd(&lsm);
858 struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
860 struct lu_object *luobj;
861 struct lov_stripe_md *lsm = NULL;
866 luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
869 lsm = lov_lsm_addref(lu2lov(luobj));
872 EXPORT_SYMBOL(lov_lsm_get);
874 void lov_lsm_put(struct cl_object *unused, struct lov_stripe_md *lsm)
877 lov_free_memmd(&lsm);
879 EXPORT_SYMBOL(lov_lsm_put);
881 int lov_read_and_clear_async_rc(struct cl_object *clob)
883 struct lu_object *luobj;
887 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
890 struct lov_object *lov = lu2lov(luobj);
892 lov_conf_freeze(lov);
893 switch (lov->lo_type) {
895 struct lov_stripe_md *lsm;
899 LASSERT(lsm != NULL);
900 for (i = 0; i < lsm->lsm_stripe_count; i++) {
901 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
902 if (loi->loi_ar.ar_rc && !rc)
903 rc = loi->loi_ar.ar_rc;
904 loi->loi_ar.ar_rc = 0;
916 EXPORT_SYMBOL(lov_read_and_clear_async_rc);