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7 * it under the terms of the GNU General Public License version 2 only,
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13 * General Public License version 2 for more details (a copy is included
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27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, 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, struct page *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 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov);
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 /* For sanity:test_206.
137 * Do not leave the object in cache to avoid accessing
138 * freed memory. This is because osc_object is referring to
139 * lov_oinfo of lsm_stripe_data which will be freed due to
141 cl_object_kill(env, stripe);
142 cl_object_put(env, stripe);
146 hdr = cl_object_header(lov2cl(lov));
147 subhdr = cl_object_header(stripe);
148 parent = subhdr->coh_parent;
150 oinfo = lov->lo_lsm->lsm_oinfo[idx];
151 CDEBUG(D_INODE, DFID"@%p[%d] -> "DFID"@%p: ostid: "DOSTID
152 " idx: %d gen: %d\n",
153 PFID(&subhdr->coh_lu.loh_fid), subhdr, idx,
154 PFID(&hdr->coh_lu.loh_fid), hdr, POSTID(&oinfo->loi_oi),
155 oinfo->loi_ost_idx, oinfo->loi_ost_gen);
157 if (parent == NULL) {
158 subhdr->coh_parent = hdr;
159 subhdr->coh_nesting = hdr->coh_nesting + 1;
160 lu_object_ref_add(&stripe->co_lu, "lov-parent", lov);
161 r0->lo_sub[idx] = cl2lovsub(stripe);
162 r0->lo_sub[idx]->lso_super = lov;
163 r0->lo_sub[idx]->lso_index = idx;
166 struct lu_object *old_obj;
167 struct lov_object *old_lov;
168 unsigned int mask = D_INODE;
170 old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
171 LASSERT(old_obj != NULL);
172 old_lov = cl2lov(lu2cl(old_obj));
173 if (old_lov->lo_layout_invalid) {
174 /* the object's layout has already changed but isn't
176 lu_object_unhash(env, &stripe->co_lu);
183 LU_OBJECT_DEBUG(mask, env, &stripe->co_lu,
184 "stripe %d is already owned.\n", idx);
185 LU_OBJECT_DEBUG(mask, env, old_obj, "owned.\n");
186 LU_OBJECT_HEADER(mask, env, lov2lu(lov), "try to own.\n");
187 cl_object_put(env, stripe);
192 static int lov_init_raid0(const struct lu_env *env,
193 struct lov_device *dev, struct lov_object *lov,
194 const struct cl_object_conf *conf,
195 union lov_layout_state *state)
200 struct cl_object *stripe;
201 struct lov_thread_info *lti = lov_env_info(env);
202 struct cl_object_conf *subconf = <i->lti_stripe_conf;
203 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
204 struct lu_fid *ofid = <i->lti_fid;
205 struct lov_layout_raid0 *r0 = &state->raid0;
209 if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3) {
210 dump_lsm(D_ERROR, lsm);
211 LASSERTF(0, "magic mismatch, expected %d/%d, actual %d.\n",
212 LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
215 LASSERT(lov->lo_lsm == NULL);
216 lov->lo_lsm = lsm_addref(lsm);
217 r0->lo_nr = lsm->lsm_stripe_count;
218 LASSERT(r0->lo_nr <= lov_targets_nr(dev));
220 OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
221 if (r0->lo_sub != NULL) {
223 subconf->coc_inode = conf->coc_inode;
224 spin_lock_init(&r0->lo_sub_lock);
226 * Create stripe cl_objects.
228 for (i = 0; i < r0->lo_nr && result == 0; ++i) {
229 struct cl_device *subdev;
230 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
231 int ost_idx = oinfo->loi_ost_idx;
233 result = ostid_to_fid(ofid, &oinfo->loi_oi,
238 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
239 subconf->u.coc_oinfo = oinfo;
240 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
241 /* In the function below, .hs_keycmp resolves to
242 * lu_obj_hop_keycmp() */
243 /* coverity[overrun-buffer-val] */
244 stripe = lov_sub_find(env, subdev, ofid, subconf);
245 if (!IS_ERR(stripe)) {
246 result = lov_init_sub(env, lov, stripe, r0, i);
247 if (result == -EAGAIN) { /* try again */
252 result = PTR_ERR(stripe);
261 static int lov_init_released(const struct lu_env *env,
262 struct lov_device *dev, struct lov_object *lov,
263 const struct cl_object_conf *conf,
264 union lov_layout_state *state)
266 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
268 LASSERT(lsm != NULL);
269 LASSERT(lsm_is_released(lsm));
270 LASSERT(lov->lo_lsm == NULL);
272 lov->lo_lsm = lsm_addref(lsm);
276 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
277 union lov_layout_state *state)
279 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
281 lov_layout_wait(env, lov);
283 cl_object_prune(env, &lov->lo_cl);
287 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
288 struct lovsub_object *los, int idx)
290 struct cl_object *sub;
291 struct lov_layout_raid0 *r0;
292 struct lu_site *site;
293 struct lu_site_bkt_data *bkt;
294 cfs_waitlink_t *waiter;
297 LASSERT(r0->lo_sub[idx] == los);
299 sub = lovsub2cl(los);
300 site = sub->co_lu.lo_dev->ld_site;
301 bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
303 cl_object_kill(env, sub);
304 /* release a reference to the sub-object and ... */
305 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
306 cl_object_put(env, sub);
308 /* ... wait until it is actually destroyed---sub-object clears its
309 * ->lo_sub[] slot in lovsub_object_fini() */
310 if (r0->lo_sub[idx] == los) {
311 waiter = &lov_env_info(env)->lti_waiter;
312 cfs_waitlink_init(waiter);
313 cfs_waitq_add(&bkt->lsb_marche_funebre, waiter);
314 cfs_set_current_state(CFS_TASK_UNINT);
316 /* this wait-queue is signaled at the end of
317 * lu_object_free(). */
318 cfs_set_current_state(CFS_TASK_UNINT);
319 spin_lock(&r0->lo_sub_lock);
320 if (r0->lo_sub[idx] == los) {
321 spin_unlock(&r0->lo_sub_lock);
322 cfs_waitq_wait(waiter, CFS_TASK_UNINT);
324 spin_unlock(&r0->lo_sub_lock);
325 cfs_set_current_state(CFS_TASK_RUNNING);
329 cfs_waitq_del(&bkt->lsb_marche_funebre, waiter);
331 LASSERT(r0->lo_sub[idx] == NULL);
334 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
335 union lov_layout_state *state)
337 struct lov_layout_raid0 *r0 = &state->raid0;
338 struct lov_stripe_md *lsm = lov->lo_lsm;
343 dump_lsm(D_INODE, lsm);
345 lov_layout_wait(env, lov);
346 if (r0->lo_sub != NULL) {
347 for (i = 0; i < r0->lo_nr; ++i) {
348 struct lovsub_object *los = r0->lo_sub[i];
351 cl_locks_prune(env, &los->lso_cl, 1);
353 * If top-level object is to be evicted from
354 * the cache, so are its sub-objects.
356 lov_subobject_kill(env, lov, los, i);
360 cl_object_prune(env, &lov->lo_cl);
364 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
365 union lov_layout_state *state)
367 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
370 static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
371 union lov_layout_state *state)
373 struct lov_layout_raid0 *r0 = &state->raid0;
376 if (r0->lo_sub != NULL) {
377 OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
381 dump_lsm(D_INODE, lov->lo_lsm);
382 lov_free_memmd(&lov->lo_lsm);
387 static void lov_fini_released(const struct lu_env *env, struct lov_object *lov,
388 union lov_layout_state *state)
391 dump_lsm(D_INODE, lov->lo_lsm);
392 lov_free_memmd(&lov->lo_lsm);
396 static int lov_print_empty(const struct lu_env *env, void *cookie,
397 lu_printer_t p, const struct lu_object *o)
399 (*p)(env, cookie, "empty %d\n", lu2lov(o)->lo_layout_invalid);
403 static int lov_print_raid0(const struct lu_env *env, void *cookie,
404 lu_printer_t p, const struct lu_object *o)
406 struct lov_object *lov = lu2lov(o);
407 struct lov_layout_raid0 *r0 = lov_r0(lov);
408 struct lov_stripe_md *lsm = lov->lo_lsm;
411 (*p)(env, cookie, "stripes: %d, %svalid, lsm{%p 0x%08X %d %u %u}: \n",
412 r0->lo_nr, lov->lo_layout_invalid ? "in" : "", lsm,
413 lsm->lsm_magic, cfs_atomic_read(&lsm->lsm_refc),
414 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
415 for (i = 0; i < r0->lo_nr; ++i) {
416 struct lu_object *sub;
418 if (r0->lo_sub[i] != NULL) {
419 sub = lovsub2lu(r0->lo_sub[i]);
420 lu_object_print(env, cookie, p, sub);
422 (*p)(env, cookie, "sub %d absent\n", i);
427 static int lov_print_released(const struct lu_env *env, void *cookie,
428 lu_printer_t p, const struct lu_object *o)
430 (*p)(env, cookie, "released\n");
435 * Implements cl_object_operations::coo_attr_get() method for an object
436 * without stripes (LLT_EMPTY layout type).
438 * The only attributes this layer is authoritative in this case is
439 * cl_attr::cat_blocks---it's 0.
441 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
442 struct cl_attr *attr)
444 attr->cat_blocks = 0;
448 static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
449 struct cl_attr *attr)
451 struct lov_object *lov = cl2lov(obj);
452 struct lov_layout_raid0 *r0 = lov_r0(lov);
453 struct cl_attr *lov_attr = &r0->lo_attr;
458 /* this is called w/o holding type guard mutex, so it must be inside
459 * an on going IO otherwise lsm may be replaced.
460 * LU-2117: it turns out there exists one exception. For mmaped files,
461 * the lock of those files may be requested in the other file's IO
462 * context, and this function is called in ccc_lock_state(), it will
463 * hit this assertion.
464 * Anyway, it's still okay to call attr_get w/o type guard as layout
465 * can't go if locks exist. */
466 /* LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 1); */
468 if (!r0->lo_attr_valid) {
469 struct lov_stripe_md *lsm = lov->lo_lsm;
470 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
473 memset(lvb, 0, sizeof(*lvb));
474 /* XXX: timestamps can be negative by sanity:test_39m,
476 lvb->lvb_atime = LLONG_MIN;
477 lvb->lvb_ctime = LLONG_MIN;
478 lvb->lvb_mtime = LLONG_MIN;
481 * XXX that should be replaced with a loop over sub-objects,
482 * doing cl_object_attr_get() on them. But for now, let's
483 * reuse old lov code.
487 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
488 * happy. It's not needed, because new code uses
489 * ->coh_attr_guard spin-lock to protect consistency of
490 * sub-object attributes.
492 lov_stripe_lock(lsm);
493 result = lov_merge_lvb_kms(lsm, lvb, &kms);
494 lov_stripe_unlock(lsm);
496 cl_lvb2attr(lov_attr, lvb);
497 lov_attr->cat_kms = kms;
498 r0->lo_attr_valid = 1;
501 if (result == 0) { /* merge results */
502 attr->cat_blocks = lov_attr->cat_blocks;
503 attr->cat_size = lov_attr->cat_size;
504 attr->cat_kms = lov_attr->cat_kms;
505 if (attr->cat_atime < lov_attr->cat_atime)
506 attr->cat_atime = lov_attr->cat_atime;
507 if (attr->cat_ctime < lov_attr->cat_ctime)
508 attr->cat_ctime = lov_attr->cat_ctime;
509 if (attr->cat_mtime < lov_attr->cat_mtime)
510 attr->cat_mtime = lov_attr->cat_mtime;
515 const static struct lov_layout_operations lov_dispatch[] = {
517 .llo_init = lov_init_empty,
518 .llo_delete = lov_delete_empty,
519 .llo_fini = lov_fini_empty,
520 .llo_install = lov_install_empty,
521 .llo_print = lov_print_empty,
522 .llo_page_init = lov_page_init_empty,
523 .llo_lock_init = lov_lock_init_empty,
524 .llo_io_init = lov_io_init_empty,
525 .llo_getattr = lov_attr_get_empty
528 .llo_init = lov_init_raid0,
529 .llo_delete = lov_delete_raid0,
530 .llo_fini = lov_fini_raid0,
531 .llo_install = lov_install_raid0,
532 .llo_print = lov_print_raid0,
533 .llo_page_init = lov_page_init_raid0,
534 .llo_lock_init = lov_lock_init_raid0,
535 .llo_io_init = lov_io_init_raid0,
536 .llo_getattr = lov_attr_get_raid0
539 .llo_init = lov_init_released,
540 .llo_delete = lov_delete_empty,
541 .llo_fini = lov_fini_released,
542 .llo_install = lov_install_empty,
543 .llo_print = lov_print_released,
544 .llo_page_init = lov_page_init_empty,
545 .llo_lock_init = lov_lock_init_empty,
546 .llo_io_init = lov_io_init_released,
547 .llo_getattr = lov_attr_get_empty
552 * Performs a double-dispatch based on the layout type of an object.
554 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
556 struct lov_object *__obj = (obj); \
557 enum lov_layout_type __llt; \
559 __llt = __obj->lo_type; \
560 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
561 lov_dispatch[__llt].op(__VA_ARGS__); \
565 * Return lov_layout_type associated with a given lsm
567 enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
571 if (lsm_is_released(lsm))
576 static inline void lov_conf_freeze(struct lov_object *lov)
578 if (lov->lo_owner != cfs_current())
579 down_read(&lov->lo_type_guard);
582 static inline void lov_conf_thaw(struct lov_object *lov)
584 if (lov->lo_owner != cfs_current())
585 up_read(&lov->lo_type_guard);
588 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
590 struct lov_object *__obj = (obj); \
591 int __lock = !!(lock); \
592 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
595 lov_conf_freeze(__obj); \
596 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
598 lov_conf_thaw(__obj); \
603 * Performs a locked double-dispatch based on the layout type of an object.
605 #define LOV_2DISPATCH(obj, op, ...) \
606 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
608 #define LOV_2DISPATCH_VOID(obj, op, ...) \
610 struct lov_object *__obj = (obj); \
611 enum lov_layout_type __llt; \
613 lov_conf_freeze(__obj); \
614 __llt = __obj->lo_type; \
615 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
616 lov_dispatch[__llt].op(__VA_ARGS__); \
617 lov_conf_thaw(__obj); \
620 static void lov_conf_lock(struct lov_object *lov)
622 LASSERT(lov->lo_owner != cfs_current());
623 down_write(&lov->lo_type_guard);
624 LASSERT(lov->lo_owner == NULL);
625 lov->lo_owner = cfs_current();
628 static void lov_conf_unlock(struct lov_object *lov)
630 lov->lo_owner = NULL;
631 up_write(&lov->lo_type_guard);
634 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
636 struct l_wait_info lwi = { 0 };
639 while (cfs_atomic_read(&lov->lo_active_ios) > 0) {
640 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
641 PFID(lu_object_fid(lov2lu(lov))),
642 cfs_atomic_read(&lov->lo_active_ios));
644 l_wait_event(lov->lo_waitq,
645 cfs_atomic_read(&lov->lo_active_ios) == 0, &lwi);
650 static int lov_layout_change(const struct lu_env *unused,
651 struct lov_object *lov,
652 const struct cl_object_conf *conf)
655 enum lov_layout_type llt = LLT_EMPTY;
656 union lov_layout_state *state = &lov->u;
657 const struct lov_layout_operations *old_ops;
658 const struct lov_layout_operations *new_ops;
660 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
666 LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
668 if (conf->u.coc_md != NULL)
669 llt = lov_type(conf->u.coc_md->lsm);
670 LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
672 cookie = cl_env_reenter();
673 env = cl_env_get(&refcheck);
675 cl_env_reexit(cookie);
676 RETURN(PTR_ERR(env));
679 old_ops = &lov_dispatch[lov->lo_type];
680 new_ops = &lov_dispatch[llt];
682 result = old_ops->llo_delete(env, lov, &lov->u);
684 old_ops->llo_fini(env, lov, &lov->u);
686 LASSERT(cfs_atomic_read(&lov->lo_active_ios) == 0);
687 LASSERT(hdr->coh_tree.rnode == NULL);
688 LASSERT(hdr->coh_pages == 0);
690 lov->lo_type = LLT_EMPTY;
691 result = new_ops->llo_init(env,
692 lu2lov_dev(lov->lo_cl.co_lu.lo_dev),
695 new_ops->llo_install(env, lov, state);
698 new_ops->llo_delete(env, lov, state);
699 new_ops->llo_fini(env, lov, state);
700 /* this file becomes an EMPTY file. */
704 cl_env_put(env, &refcheck);
705 cl_env_reexit(cookie);
709 /*****************************************************************************
711 * Lov object operations.
714 int lov_object_init(const struct lu_env *env, struct lu_object *obj,
715 const struct lu_object_conf *conf)
717 struct lov_device *dev = lu2lov_dev(obj->lo_dev);
718 struct lov_object *lov = lu2lov(obj);
719 const struct cl_object_conf *cconf = lu2cl_conf(conf);
720 union lov_layout_state *set = &lov->u;
721 const struct lov_layout_operations *ops;
725 init_rwsem(&lov->lo_type_guard);
726 cfs_atomic_set(&lov->lo_active_ios, 0);
727 cfs_waitq_init(&lov->lo_waitq);
729 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
731 /* no locking is necessary, as object is being created */
732 lov->lo_type = lov_type(cconf->u.coc_md->lsm);
733 ops = &lov_dispatch[lov->lo_type];
734 result = ops->llo_init(env, dev, lov, cconf, set);
736 ops->llo_install(env, lov, set);
740 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
741 const struct cl_object_conf *conf)
743 struct lov_stripe_md *lsm = NULL;
744 struct lov_object *lov = cl2lov(obj);
749 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
750 lov->lo_layout_invalid = true;
751 GOTO(out, result = 0);
754 if (conf->coc_opc == OBJECT_CONF_WAIT) {
755 if (lov->lo_layout_invalid &&
756 cfs_atomic_read(&lov->lo_active_ios) > 0) {
757 lov_conf_unlock(lov);
758 result = lov_layout_wait(env, lov);
764 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
766 if (conf->u.coc_md != NULL)
767 lsm = conf->u.coc_md->lsm;
768 if ((lsm == NULL && lov->lo_lsm == NULL) ||
769 (lsm != NULL && lov->lo_lsm != NULL &&
770 lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen)) {
771 /* same version of layout */
772 lov->lo_layout_invalid = false;
773 GOTO(out, result = 0);
776 /* will change layout - check if there still exists active IO. */
777 if (cfs_atomic_read(&lov->lo_active_ios) > 0) {
778 lov->lo_layout_invalid = true;
779 GOTO(out, result = -EBUSY);
782 lov->lo_layout_invalid = lov_layout_change(env, lov, conf);
786 lov_conf_unlock(lov);
790 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
792 struct lov_object *lov = lu2lov(obj);
795 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
799 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
801 struct lov_object *lov = lu2lov(obj);
804 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
806 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
810 static int lov_object_print(const struct lu_env *env, void *cookie,
811 lu_printer_t p, const struct lu_object *o)
813 return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
816 int lov_page_init(const struct lu_env *env, struct cl_object *obj,
817 struct cl_page *page, struct page *vmpage)
819 return LOV_2DISPATCH_NOLOCK(cl2lov(obj),
820 llo_page_init, env, obj, page, vmpage);
824 * Implements cl_object_operations::clo_io_init() method for lov
825 * layer. Dispatches to the appropriate layout io initialization method.
827 int lov_io_init(const struct lu_env *env, struct cl_object *obj,
830 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
831 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
832 !io->ci_ignore_layout, env, obj, io);
836 * An implementation of cl_object_operations::clo_attr_get() method for lov
837 * layer. For raid0 layout this collects and merges attributes of all
840 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
841 struct cl_attr *attr)
843 /* do not take lock, as this function is called under a
844 * spin-lock. Layout is protected from changing by ongoing IO. */
845 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
848 static int lov_attr_set(const struct lu_env *env, struct cl_object *obj,
849 const struct cl_attr *attr, unsigned valid)
852 * No dispatch is required here, as no layout implements this.
857 int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
858 struct cl_lock *lock, const struct cl_io *io)
860 /* No need to lock because we've taken one refcount of layout. */
861 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
865 static const struct cl_object_operations lov_ops = {
866 .coo_page_init = lov_page_init,
867 .coo_lock_init = lov_lock_init,
868 .coo_io_init = lov_io_init,
869 .coo_attr_get = lov_attr_get,
870 .coo_attr_set = lov_attr_set,
871 .coo_conf_set = lov_conf_set
874 static const struct lu_object_operations lov_lu_obj_ops = {
875 .loo_object_init = lov_object_init,
876 .loo_object_delete = lov_object_delete,
877 .loo_object_release = NULL,
878 .loo_object_free = lov_object_free,
879 .loo_object_print = lov_object_print,
880 .loo_object_invariant = NULL
883 struct lu_object *lov_object_alloc(const struct lu_env *env,
884 const struct lu_object_header *unused,
885 struct lu_device *dev)
887 struct lov_object *lov;
888 struct lu_object *obj;
891 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, __GFP_IO);
894 lu_object_init(obj, NULL, dev);
895 lov->lo_cl.co_ops = &lov_ops;
896 lov->lo_type = -1; /* invalid, to catch uninitialized type */
898 * object io operation vector (cl_object::co_iop) is installed
899 * later in lov_object_init(), as different vectors are used
900 * for object with different layouts.
902 obj->lo_ops = &lov_lu_obj_ops;
908 struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
910 struct lov_stripe_md *lsm = NULL;
912 lov_conf_freeze(lov);
913 if (lov->lo_lsm != NULL) {
914 lsm = lsm_addref(lov->lo_lsm);
915 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
916 lsm, cfs_atomic_read(&lsm->lsm_refc),
917 lov->lo_layout_invalid, cfs_current());
923 void lov_lsm_decref(struct lov_object *lov, struct lov_stripe_md *lsm)
928 CDEBUG(D_INODE, "lsm %p decref %d by %p.\n",
929 lsm, cfs_atomic_read(&lsm->lsm_refc), cfs_current());
931 lov_free_memmd(&lsm);
934 struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
936 struct lu_object *luobj;
937 struct lov_stripe_md *lsm = NULL;
942 luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
945 lsm = lov_lsm_addref(lu2lov(luobj));
948 EXPORT_SYMBOL(lov_lsm_get);
950 void lov_lsm_put(struct cl_object *unused, struct lov_stripe_md *lsm)
953 lov_free_memmd(&lsm);
955 EXPORT_SYMBOL(lov_lsm_put);
957 int lov_read_and_clear_async_rc(struct cl_object *clob)
959 struct lu_object *luobj;
963 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
966 struct lov_object *lov = lu2lov(luobj);
968 lov_conf_freeze(lov);
969 switch (lov->lo_type) {
971 struct lov_stripe_md *lsm;
975 LASSERT(lsm != NULL);
976 for (i = 0; i < lsm->lsm_stripe_count; i++) {
977 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
978 if (loi->loi_ar.ar_rc && !rc)
979 rc = loi->loi_ar.ar_rc;
980 loi->loi_ar.ar_rc = 0;
993 EXPORT_SYMBOL(lov_read_and_clear_async_rc);