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27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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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"
50 /*****************************************************************************
56 struct lov_layout_operations {
57 int (*llo_init)(const struct lu_env *env, struct lov_device *dev,
58 struct lov_object *lov,
59 const struct cl_object_conf *conf,
60 union lov_layout_state *state);
61 int (*llo_delete)(const struct lu_env *env, struct lov_object *lov,
62 union lov_layout_state *state);
63 void (*llo_fini)(const struct lu_env *env, struct lov_object *lov,
64 union lov_layout_state *state);
65 void (*llo_install)(const struct lu_env *env, struct lov_object *lov,
66 union lov_layout_state *state);
67 int (*llo_print)(const struct lu_env *env, void *cookie,
68 lu_printer_t p, const struct lu_object *o);
69 int (*llo_page_init)(const struct lu_env *env, struct cl_object *obj,
70 struct cl_page *page, pgoff_t index);
71 int (*llo_lock_init)(const struct lu_env *env,
72 struct cl_object *obj, struct cl_lock *lock,
73 const struct cl_io *io);
74 int (*llo_io_init)(const struct lu_env *env,
75 struct cl_object *obj, struct cl_io *io);
76 int (*llo_getattr)(const struct lu_env *env, struct cl_object *obj,
77 struct cl_attr *attr);
80 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov);
82 /*****************************************************************************
84 * Lov object layout operations.
88 static void lov_install_empty(const struct lu_env *env,
89 struct lov_object *lov,
90 union lov_layout_state *state)
93 * File without objects.
97 static int lov_init_empty(const struct lu_env *env,
98 struct lov_device *dev, struct lov_object *lov,
99 const struct cl_object_conf *conf,
100 union lov_layout_state *state)
105 static void lov_install_raid0(const struct lu_env *env,
106 struct lov_object *lov,
107 union lov_layout_state *state)
111 static struct cl_object *lov_sub_find(const struct lu_env *env,
112 struct cl_device *dev,
113 const struct lu_fid *fid,
114 const struct cl_object_conf *conf)
119 o = lu_object_find_at(env, cl2lu_dev(dev), fid, &conf->coc_lu);
120 LASSERT(ergo(!IS_ERR(o), o->lo_dev->ld_type == &lovsub_device_type));
124 static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
125 struct cl_object *stripe, struct lov_layout_raid0 *r0,
128 struct cl_object_header *hdr;
129 struct cl_object_header *subhdr;
130 struct cl_object_header *parent;
131 struct lov_oinfo *oinfo;
134 if (OBD_FAIL_CHECK(OBD_FAIL_LOV_INIT)) {
135 /* For sanity:test_206.
136 * Do not leave the object in cache to avoid accessing
137 * freed memory. This is because osc_object is referring to
138 * lov_oinfo of lsm_stripe_data which will be freed due to
140 cl_object_kill(env, stripe);
141 cl_object_put(env, stripe);
145 hdr = cl_object_header(lov2cl(lov));
146 subhdr = cl_object_header(stripe);
148 oinfo = lov->lo_lsm->lsm_oinfo[idx];
149 CDEBUG(D_INODE, DFID"@%p[%d] -> "DFID"@%p: ostid: "DOSTID
150 " idx: %d gen: %d\n",
151 PFID(&subhdr->coh_lu.loh_fid), subhdr, idx,
152 PFID(&hdr->coh_lu.loh_fid), hdr, POSTID(&oinfo->loi_oi),
153 oinfo->loi_ost_idx, oinfo->loi_ost_gen);
155 /* reuse ->coh_attr_guard to protect coh_parent change */
156 spin_lock(&subhdr->coh_attr_guard);
157 parent = subhdr->coh_parent;
158 if (parent == NULL) {
159 subhdr->coh_parent = hdr;
160 spin_unlock(&subhdr->coh_attr_guard);
161 subhdr->coh_nesting = hdr->coh_nesting + 1;
162 lu_object_ref_add(&stripe->co_lu, "lov-parent", lov);
163 r0->lo_sub[idx] = cl2lovsub(stripe);
164 r0->lo_sub[idx]->lso_super = lov;
165 r0->lo_sub[idx]->lso_index = idx;
168 struct lu_object *old_obj;
169 struct lov_object *old_lov;
170 unsigned int mask = D_INODE;
172 spin_unlock(&subhdr->coh_attr_guard);
173 old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
174 LASSERT(old_obj != NULL);
175 old_lov = cl2lov(lu2cl(old_obj));
176 if (old_lov->lo_layout_invalid) {
177 /* the object's layout has already changed but isn't
179 lu_object_unhash(env, &stripe->co_lu);
186 LU_OBJECT_DEBUG(mask, env, &stripe->co_lu,
187 "stripe %d is already owned.\n", idx);
188 LU_OBJECT_DEBUG(mask, env, old_obj, "owned.\n");
189 LU_OBJECT_HEADER(mask, env, lov2lu(lov), "try to own.\n");
190 cl_object_put(env, stripe);
195 static int lov_page_slice_fixup(struct lov_object *lov,
196 struct cl_object *stripe)
198 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
202 return hdr->coh_page_bufsize - lov->lo_cl.co_slice_off -
203 cfs_size_round(sizeof(struct lov_page));
205 cl_object_for_each(o, stripe)
206 o->co_slice_off += hdr->coh_page_bufsize;
208 return cl_object_header(stripe)->coh_page_bufsize;
211 static int lov_init_raid0(const struct lu_env *env,
212 struct lov_device *dev, struct lov_object *lov,
213 const struct cl_object_conf *conf,
214 union lov_layout_state *state)
219 struct cl_object *stripe;
220 struct lov_thread_info *lti = lov_env_info(env);
221 struct cl_object_conf *subconf = <i->lti_stripe_conf;
222 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
223 struct lu_fid *ofid = <i->lti_fid;
224 struct lov_layout_raid0 *r0 = &state->raid0;
228 if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3) {
229 dump_lsm(D_ERROR, lsm);
230 LASSERTF(0, "magic mismatch, expected %d/%d, actual %d.\n",
231 LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
234 LASSERT(lov->lo_lsm == NULL);
235 lov->lo_lsm = lsm_addref(lsm);
236 r0->lo_nr = lsm->lsm_stripe_count;
237 LASSERT(r0->lo_nr <= lov_targets_nr(dev));
239 lov->lo_layout_invalid = true;
241 OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
242 if (r0->lo_sub != NULL) {
246 subconf->coc_inode = conf->coc_inode;
247 spin_lock_init(&r0->lo_sub_lock);
249 * Create stripe cl_objects.
251 for (i = 0; i < r0->lo_nr && result == 0; ++i) {
252 struct cl_device *subdev;
253 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
254 int ost_idx = oinfo->loi_ost_idx;
256 if (lov_oinfo_is_dummy(oinfo))
259 result = ostid_to_fid(ofid, &oinfo->loi_oi,
264 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
265 subconf->u.coc_oinfo = oinfo;
266 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
267 /* In the function below, .hs_keycmp resolves to
268 * lu_obj_hop_keycmp() */
269 /* coverity[overrun-buffer-val] */
270 stripe = lov_sub_find(env, subdev, ofid, subconf);
271 if (!IS_ERR(stripe)) {
272 result = lov_init_sub(env, lov, stripe, r0, i);
273 if (result == -EAGAIN) { /* try again */
279 result = PTR_ERR(stripe);
283 int sz = lov_page_slice_fixup(lov, stripe);
284 LASSERT(ergo(psz > 0, psz == sz));
289 cl_object_header(&lov->lo_cl)->coh_page_bufsize += psz;
296 static int lov_init_released(const struct lu_env *env,
297 struct lov_device *dev, struct lov_object *lov,
298 const struct cl_object_conf *conf,
299 union lov_layout_state *state)
301 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
303 LASSERT(lsm != NULL);
304 LASSERT(lsm_is_released(lsm));
305 LASSERT(lov->lo_lsm == NULL);
307 lov->lo_lsm = lsm_addref(lsm);
311 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
312 union lov_layout_state *state)
314 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
316 lov_layout_wait(env, lov);
318 cl_locks_prune(env, &lov->lo_cl, 0);
322 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
323 struct lovsub_object *los, int idx)
325 struct cl_object *sub;
326 struct lov_layout_raid0 *r0;
327 struct lu_site *site;
328 struct lu_site_bkt_data *bkt;
329 wait_queue_t *waiter;
332 LASSERT(r0->lo_sub[idx] == los);
334 sub = lovsub2cl(los);
335 site = sub->co_lu.lo_dev->ld_site;
336 bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
338 cl_object_kill(env, sub);
339 /* release a reference to the sub-object and ... */
340 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
341 cl_object_put(env, sub);
343 /* ... wait until it is actually destroyed---sub-object clears its
344 * ->lo_sub[] slot in lovsub_object_fini() */
345 if (r0->lo_sub[idx] == los) {
346 waiter = &lov_env_info(env)->lti_waiter;
347 init_waitqueue_entry_current(waiter);
348 add_wait_queue(&bkt->lsb_marche_funebre, waiter);
349 set_current_state(TASK_UNINTERRUPTIBLE);
351 /* this wait-queue is signaled at the end of
352 * lu_object_free(). */
353 set_current_state(TASK_UNINTERRUPTIBLE);
354 spin_lock(&r0->lo_sub_lock);
355 if (r0->lo_sub[idx] == los) {
356 spin_unlock(&r0->lo_sub_lock);
357 waitq_wait(waiter, TASK_UNINTERRUPTIBLE);
359 spin_unlock(&r0->lo_sub_lock);
360 set_current_state(TASK_RUNNING);
364 remove_wait_queue(&bkt->lsb_marche_funebre, waiter);
366 LASSERT(r0->lo_sub[idx] == NULL);
369 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
370 union lov_layout_state *state)
372 struct lov_layout_raid0 *r0 = &state->raid0;
373 struct lov_stripe_md *lsm = lov->lo_lsm;
378 dump_lsm(D_INODE, lsm);
380 lov_layout_wait(env, lov);
381 if (r0->lo_sub != NULL) {
382 for (i = 0; i < r0->lo_nr; ++i) {
383 struct lovsub_object *los = r0->lo_sub[i];
386 cl_locks_prune(env, &los->lso_cl, 1);
388 * If top-level object is to be evicted from
389 * the cache, so are its sub-objects.
391 lov_subobject_kill(env, lov, los, i);
395 cl_locks_prune(env, &lov->lo_cl, 0);
399 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
400 union lov_layout_state *state)
402 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
405 static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
406 union lov_layout_state *state)
408 struct lov_layout_raid0 *r0 = &state->raid0;
411 if (r0->lo_sub != NULL) {
412 OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
416 dump_lsm(D_INODE, lov->lo_lsm);
417 lov_free_memmd(&lov->lo_lsm);
422 static void lov_fini_released(const struct lu_env *env, struct lov_object *lov,
423 union lov_layout_state *state)
426 dump_lsm(D_INODE, lov->lo_lsm);
427 lov_free_memmd(&lov->lo_lsm);
431 static int lov_print_empty(const struct lu_env *env, void *cookie,
432 lu_printer_t p, const struct lu_object *o)
434 (*p)(env, cookie, "empty %d\n", lu2lov(o)->lo_layout_invalid);
438 static int lov_print_raid0(const struct lu_env *env, void *cookie,
439 lu_printer_t p, const struct lu_object *o)
441 struct lov_object *lov = lu2lov(o);
442 struct lov_layout_raid0 *r0 = lov_r0(lov);
443 struct lov_stripe_md *lsm = lov->lo_lsm;
446 (*p)(env, cookie, "stripes: %d, %s, lsm{%p 0x%08X %d %u %u}:\n",
447 r0->lo_nr, lov->lo_layout_invalid ? "invalid" : "valid", lsm,
448 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
449 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
450 for (i = 0; i < r0->lo_nr; ++i) {
451 struct lu_object *sub;
453 if (r0->lo_sub[i] != NULL) {
454 sub = lovsub2lu(r0->lo_sub[i]);
455 lu_object_print(env, cookie, p, sub);
457 (*p)(env, cookie, "sub %d absent\n", i);
463 static int lov_print_released(const struct lu_env *env, void *cookie,
464 lu_printer_t p, const struct lu_object *o)
466 struct lov_object *lov = lu2lov(o);
467 struct lov_stripe_md *lsm = lov->lo_lsm;
470 "released: %s, lsm{%p 0x%08X %d %u %u}:\n",
471 lov->lo_layout_invalid ? "invalid" : "valid", lsm,
472 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
473 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
478 * Implements cl_object_operations::coo_attr_get() method for an object
479 * without stripes (LLT_EMPTY layout type).
481 * The only attributes this layer is authoritative in this case is
482 * cl_attr::cat_blocks---it's 0.
484 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
485 struct cl_attr *attr)
487 attr->cat_blocks = 0;
491 static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
492 struct cl_attr *attr)
494 struct lov_object *lov = cl2lov(obj);
495 struct lov_layout_raid0 *r0 = lov_r0(lov);
496 struct cl_attr *lov_attr = &r0->lo_attr;
501 /* this is called w/o holding type guard mutex, so it must be inside
502 * an on going IO otherwise lsm may be replaced.
503 * LU-2117: it turns out there exists one exception. For mmaped files,
504 * the lock of those files may be requested in the other file's IO
505 * context, and this function is called in ccc_lock_state(), it will
506 * hit this assertion.
507 * Anyway, it's still okay to call attr_get w/o type guard as layout
508 * can't go if locks exist. */
509 /* LASSERT(atomic_read(&lsm->lsm_refc) > 1); */
511 if (!r0->lo_attr_valid) {
512 struct lov_stripe_md *lsm = lov->lo_lsm;
513 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
516 memset(lvb, 0, sizeof(*lvb));
517 /* XXX: timestamps can be negative by sanity:test_39m,
519 lvb->lvb_atime = LLONG_MIN;
520 lvb->lvb_ctime = LLONG_MIN;
521 lvb->lvb_mtime = LLONG_MIN;
524 * XXX that should be replaced with a loop over sub-objects,
525 * doing cl_object_attr_get() on them. But for now, let's
526 * reuse old lov code.
530 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
531 * happy. It's not needed, because new code uses
532 * ->coh_attr_guard spin-lock to protect consistency of
533 * sub-object attributes.
535 lov_stripe_lock(lsm);
536 result = lov_merge_lvb_kms(lsm, lvb, &kms);
537 lov_stripe_unlock(lsm);
539 cl_lvb2attr(lov_attr, lvb);
540 lov_attr->cat_kms = kms;
541 r0->lo_attr_valid = 1;
544 if (result == 0) { /* merge results */
545 attr->cat_blocks = lov_attr->cat_blocks;
546 attr->cat_size = lov_attr->cat_size;
547 attr->cat_kms = lov_attr->cat_kms;
548 if (attr->cat_atime < lov_attr->cat_atime)
549 attr->cat_atime = lov_attr->cat_atime;
550 if (attr->cat_ctime < lov_attr->cat_ctime)
551 attr->cat_ctime = lov_attr->cat_ctime;
552 if (attr->cat_mtime < lov_attr->cat_mtime)
553 attr->cat_mtime = lov_attr->cat_mtime;
558 const static struct lov_layout_operations lov_dispatch[] = {
560 .llo_init = lov_init_empty,
561 .llo_delete = lov_delete_empty,
562 .llo_fini = lov_fini_empty,
563 .llo_install = lov_install_empty,
564 .llo_print = lov_print_empty,
565 .llo_page_init = lov_page_init_empty,
566 .llo_lock_init = lov_lock_init_empty,
567 .llo_io_init = lov_io_init_empty,
568 .llo_getattr = lov_attr_get_empty
571 .llo_init = lov_init_raid0,
572 .llo_delete = lov_delete_raid0,
573 .llo_fini = lov_fini_raid0,
574 .llo_install = lov_install_raid0,
575 .llo_print = lov_print_raid0,
576 .llo_page_init = lov_page_init_raid0,
577 .llo_lock_init = lov_lock_init_raid0,
578 .llo_io_init = lov_io_init_raid0,
579 .llo_getattr = lov_attr_get_raid0
582 .llo_init = lov_init_released,
583 .llo_delete = lov_delete_empty,
584 .llo_fini = lov_fini_released,
585 .llo_install = lov_install_empty,
586 .llo_print = lov_print_released,
587 .llo_page_init = lov_page_init_empty,
588 .llo_lock_init = lov_lock_init_empty,
589 .llo_io_init = lov_io_init_released,
590 .llo_getattr = lov_attr_get_empty
595 * Performs a double-dispatch based on the layout type of an object.
597 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
599 struct lov_object *__obj = (obj); \
600 enum lov_layout_type __llt; \
602 __llt = __obj->lo_type; \
603 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
604 lov_dispatch[__llt].op(__VA_ARGS__); \
608 * Return lov_layout_type associated with a given lsm
610 enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
614 if (lsm_is_released(lsm))
619 static inline void lov_conf_freeze(struct lov_object *lov)
621 if (lov->lo_owner != current)
622 down_read(&lov->lo_type_guard);
625 static inline void lov_conf_thaw(struct lov_object *lov)
627 if (lov->lo_owner != current)
628 up_read(&lov->lo_type_guard);
631 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
633 struct lov_object *__obj = (obj); \
634 int __lock = !!(lock); \
635 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
638 lov_conf_freeze(__obj); \
639 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
641 lov_conf_thaw(__obj); \
646 * Performs a locked double-dispatch based on the layout type of an object.
648 #define LOV_2DISPATCH(obj, op, ...) \
649 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
651 #define LOV_2DISPATCH_VOID(obj, op, ...) \
653 struct lov_object *__obj = (obj); \
654 enum lov_layout_type __llt; \
656 lov_conf_freeze(__obj); \
657 __llt = __obj->lo_type; \
658 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
659 lov_dispatch[__llt].op(__VA_ARGS__); \
660 lov_conf_thaw(__obj); \
663 static void lov_conf_lock(struct lov_object *lov)
665 LASSERT(lov->lo_owner != current);
666 down_write(&lov->lo_type_guard);
667 LASSERT(lov->lo_owner == NULL);
668 lov->lo_owner = current;
671 static void lov_conf_unlock(struct lov_object *lov)
673 lov->lo_owner = NULL;
674 up_write(&lov->lo_type_guard);
677 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
679 struct l_wait_info lwi = { 0 };
682 while (atomic_read(&lov->lo_active_ios) > 0) {
683 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
684 PFID(lu_object_fid(lov2lu(lov))),
685 atomic_read(&lov->lo_active_ios));
687 l_wait_event(lov->lo_waitq,
688 atomic_read(&lov->lo_active_ios) == 0, &lwi);
693 static int lov_layout_change(const struct lu_env *unused,
694 struct lov_object *lov,
695 const struct cl_object_conf *conf)
698 enum lov_layout_type llt = LLT_EMPTY;
699 union lov_layout_state *state = &lov->u;
700 const struct lov_layout_operations *old_ops;
701 const struct lov_layout_operations *new_ops;
708 LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
710 if (conf->u.coc_md != NULL)
711 llt = lov_type(conf->u.coc_md->lsm);
712 LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
714 cookie = cl_env_reenter();
715 env = cl_env_get(&refcheck);
717 cl_env_reexit(cookie);
718 RETURN(PTR_ERR(env));
721 CDEBUG(D_INODE, DFID" from %s to %s\n",
722 PFID(lu_object_fid(lov2lu(lov))),
723 llt2str(lov->lo_type), llt2str(llt));
725 old_ops = &lov_dispatch[lov->lo_type];
726 new_ops = &lov_dispatch[llt];
728 cl_object_prune(env, &lov->lo_cl);
730 result = old_ops->llo_delete(env, lov, &lov->u);
732 old_ops->llo_fini(env, lov, &lov->u);
734 LASSERT(atomic_read(&lov->lo_active_ios) == 0);
736 lov->lo_type = LLT_EMPTY;
737 /* page bufsize fixup */
738 cl_object_header(&lov->lo_cl)->coh_page_bufsize -=
739 lov_page_slice_fixup(lov, NULL);
741 result = new_ops->llo_init(env,
742 lu2lov_dev(lov->lo_cl.co_lu.lo_dev),
745 new_ops->llo_install(env, lov, state);
748 new_ops->llo_delete(env, lov, state);
749 new_ops->llo_fini(env, lov, state);
750 /* this file becomes an EMPTY file. */
754 cl_env_put(env, &refcheck);
755 cl_env_reexit(cookie);
759 /*****************************************************************************
761 * Lov object operations.
764 int lov_object_init(const struct lu_env *env, struct lu_object *obj,
765 const struct lu_object_conf *conf)
767 struct lov_device *dev = lu2lov_dev(obj->lo_dev);
768 struct lov_object *lov = lu2lov(obj);
769 const struct cl_object_conf *cconf = lu2cl_conf(conf);
770 union lov_layout_state *set = &lov->u;
771 const struct lov_layout_operations *ops;
775 init_rwsem(&lov->lo_type_guard);
776 atomic_set(&lov->lo_active_ios, 0);
777 init_waitqueue_head(&lov->lo_waitq);
779 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
781 /* no locking is necessary, as object is being created */
782 lov->lo_type = lov_type(cconf->u.coc_md->lsm);
783 ops = &lov_dispatch[lov->lo_type];
784 result = ops->llo_init(env, dev, lov, cconf, set);
786 ops->llo_install(env, lov, set);
790 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
791 const struct cl_object_conf *conf)
793 struct lov_stripe_md *lsm = NULL;
794 struct lov_object *lov = cl2lov(obj);
799 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
800 lov->lo_layout_invalid = true;
801 GOTO(out, result = 0);
804 if (conf->coc_opc == OBJECT_CONF_WAIT) {
805 if (lov->lo_layout_invalid &&
806 atomic_read(&lov->lo_active_ios) > 0) {
807 lov_conf_unlock(lov);
808 result = lov_layout_wait(env, lov);
814 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
816 if (conf->u.coc_md != NULL)
817 lsm = conf->u.coc_md->lsm;
818 if ((lsm == NULL && lov->lo_lsm == NULL) ||
819 ((lsm != NULL && lov->lo_lsm != NULL) &&
820 (lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
821 (lov->lo_lsm->lsm_pattern == lsm->lsm_pattern))) {
822 /* same version of layout */
823 lov->lo_layout_invalid = false;
824 GOTO(out, result = 0);
827 /* will change layout - check if there still exists active IO. */
828 if (atomic_read(&lov->lo_active_ios) > 0) {
829 lov->lo_layout_invalid = true;
830 GOTO(out, result = -EBUSY);
833 lov->lo_layout_invalid = lov_layout_change(env, lov, conf);
837 lov_conf_unlock(lov);
838 CDEBUG(D_INODE, DFID" lo_layout_invalid=%d\n",
839 PFID(lu_object_fid(lov2lu(lov))), lov->lo_layout_invalid);
843 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
845 struct lov_object *lov = lu2lov(obj);
848 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
852 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
854 struct lov_object *lov = lu2lov(obj);
857 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
859 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
863 static int lov_object_print(const struct lu_env *env, void *cookie,
864 lu_printer_t p, const struct lu_object *o)
866 return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
869 int lov_page_init(const struct lu_env *env, struct cl_object *obj,
870 struct cl_page *page, pgoff_t index)
872 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_page_init, env, obj, page,
877 * Implements cl_object_operations::clo_io_init() method for lov
878 * layer. Dispatches to the appropriate layout io initialization method.
880 int lov_io_init(const struct lu_env *env, struct cl_object *obj,
883 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
884 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
885 !io->ci_ignore_layout, env, obj, io);
889 * An implementation of cl_object_operations::clo_attr_get() method for lov
890 * layer. For raid0 layout this collects and merges attributes of all
893 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
894 struct cl_attr *attr)
896 /* do not take lock, as this function is called under a
897 * spin-lock. Layout is protected from changing by ongoing IO. */
898 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
901 static int lov_attr_set(const struct lu_env *env, struct cl_object *obj,
902 const struct cl_attr *attr, unsigned valid)
905 * No dispatch is required here, as no layout implements this.
910 int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
911 struct cl_lock *lock, const struct cl_io *io)
913 /* No need to lock because we've taken one refcount of layout. */
914 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
918 static const struct cl_object_operations lov_ops = {
919 .coo_page_init = lov_page_init,
920 .coo_lock_init = lov_lock_init,
921 .coo_io_init = lov_io_init,
922 .coo_attr_get = lov_attr_get,
923 .coo_attr_set = lov_attr_set,
924 .coo_conf_set = lov_conf_set
927 static const struct lu_object_operations lov_lu_obj_ops = {
928 .loo_object_init = lov_object_init,
929 .loo_object_delete = lov_object_delete,
930 .loo_object_release = NULL,
931 .loo_object_free = lov_object_free,
932 .loo_object_print = lov_object_print,
933 .loo_object_invariant = NULL
936 struct lu_object *lov_object_alloc(const struct lu_env *env,
937 const struct lu_object_header *unused,
938 struct lu_device *dev)
940 struct lov_object *lov;
941 struct lu_object *obj;
944 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, GFP_NOFS);
947 lu_object_init(obj, NULL, dev);
948 lov->lo_cl.co_ops = &lov_ops;
949 lov->lo_type = -1; /* invalid, to catch uninitialized type */
951 * object io operation vector (cl_object::co_iop) is installed
952 * later in lov_object_init(), as different vectors are used
953 * for object with different layouts.
955 obj->lo_ops = &lov_lu_obj_ops;
961 struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
963 struct lov_stripe_md *lsm = NULL;
965 lov_conf_freeze(lov);
966 if (lov->lo_lsm != NULL) {
967 lsm = lsm_addref(lov->lo_lsm);
968 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
969 lsm, atomic_read(&lsm->lsm_refc),
970 lov->lo_layout_invalid, current);
976 struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
978 struct lu_object *luobj;
979 struct lov_stripe_md *lsm = NULL;
984 luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
987 lsm = lov_lsm_addref(lu2lov(luobj));
990 EXPORT_SYMBOL(lov_lsm_get);
992 void lov_lsm_put(struct cl_object *unused, struct lov_stripe_md *lsm)
995 lov_free_memmd(&lsm);
997 EXPORT_SYMBOL(lov_lsm_put);
999 int lov_read_and_clear_async_rc(struct cl_object *clob)
1001 struct lu_object *luobj;
1005 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
1007 if (luobj != NULL) {
1008 struct lov_object *lov = lu2lov(luobj);
1010 lov_conf_freeze(lov);
1011 switch (lov->lo_type) {
1013 struct lov_stripe_md *lsm;
1017 LASSERT(lsm != NULL);
1018 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1019 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1021 if (lov_oinfo_is_dummy(loi))
1024 if (loi->loi_ar.ar_rc && !rc)
1025 rc = loi->loi_ar.ar_rc;
1026 loi->loi_ar.ar_rc = 0;
1039 EXPORT_SYMBOL(lov_read_and_clear_async_rc);