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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, 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 "../include/lclient.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)
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_init_raid0(const struct lu_env *env,
196 struct lov_device *dev, struct lov_object *lov,
197 const struct cl_object_conf *conf,
198 union lov_layout_state *state)
203 struct cl_object *stripe;
204 struct lov_thread_info *lti = lov_env_info(env);
205 struct cl_object_conf *subconf = <i->lti_stripe_conf;
206 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
207 struct lu_fid *ofid = <i->lti_fid;
208 struct lov_layout_raid0 *r0 = &state->raid0;
210 if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3) {
211 dump_lsm(D_ERROR, lsm);
212 LASSERTF(0, "magic mismatch, expected %d/%d, actual %d.\n",
213 LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
216 LASSERT(lov->lo_lsm == NULL);
217 lov->lo_lsm = lsm_addref(lsm);
218 r0->lo_nr = lsm->lsm_stripe_count;
219 LASSERT(r0->lo_nr <= lov_targets_nr(dev));
221 r0->lo_sub = libcfs_kvzalloc(r0->lo_nr * sizeof(r0->lo_sub[0]),
223 if (r0->lo_sub != NULL) {
225 subconf->coc_inode = conf->coc_inode;
226 spin_lock_init(&r0->lo_sub_lock);
228 * Create stripe cl_objects.
230 for (i = 0; i < r0->lo_nr && result == 0; ++i) {
231 struct cl_device *subdev;
232 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
233 int ost_idx = oinfo->loi_ost_idx;
235 if (lov_oinfo_is_dummy(oinfo))
238 result = ostid_to_fid(ofid, &oinfo->loi_oi,
243 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
244 subconf->u.coc_oinfo = oinfo;
245 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
246 /* In the function below, .hs_keycmp resolves to
247 * lu_obj_hop_keycmp() */
248 /* coverity[overrun-buffer-val] */
249 stripe = lov_sub_find(env, subdev, ofid, subconf);
250 if (!IS_ERR(stripe)) {
251 result = lov_init_sub(env, lov, stripe, r0, i);
252 if (result == -EAGAIN) { /* try again */
257 result = PTR_ERR(stripe);
266 static int lov_init_released(const struct lu_env *env,
267 struct lov_device *dev, struct lov_object *lov,
268 const struct cl_object_conf *conf,
269 union lov_layout_state *state)
271 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
273 LASSERT(lsm != NULL);
274 LASSERT(lsm_is_released(lsm));
275 LASSERT(lov->lo_lsm == NULL);
277 lov->lo_lsm = lsm_addref(lsm);
281 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
282 union lov_layout_state *state)
284 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
286 lov_layout_wait(env, lov);
288 cl_object_prune(env, &lov->lo_cl);
292 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
293 struct lovsub_object *los, int idx)
295 struct cl_object *sub;
296 struct lov_layout_raid0 *r0;
297 struct lu_site *site;
298 struct lu_site_bkt_data *bkt;
299 wait_queue_t *waiter;
302 LASSERT(r0->lo_sub[idx] == los);
304 sub = lovsub2cl(los);
305 site = sub->co_lu.lo_dev->ld_site;
306 bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
308 cl_object_kill(env, sub);
309 /* release a reference to the sub-object and ... */
310 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
311 cl_object_put(env, sub);
313 /* ... wait until it is actually destroyed---sub-object clears its
314 * ->lo_sub[] slot in lovsub_object_fini() */
315 if (r0->lo_sub[idx] == los) {
316 waiter = &lov_env_info(env)->lti_waiter;
317 init_waitqueue_entry(waiter, current);
318 add_wait_queue(&bkt->lsb_marche_funebre, waiter);
319 set_current_state(TASK_UNINTERRUPTIBLE);
321 /* this wait-queue is signaled at the end of
322 * lu_object_free(). */
323 set_current_state(TASK_UNINTERRUPTIBLE);
324 spin_lock(&r0->lo_sub_lock);
325 if (r0->lo_sub[idx] == los) {
326 spin_unlock(&r0->lo_sub_lock);
329 spin_unlock(&r0->lo_sub_lock);
330 set_current_state(TASK_RUNNING);
334 remove_wait_queue(&bkt->lsb_marche_funebre, waiter);
336 LASSERT(r0->lo_sub[idx] == NULL);
339 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
340 union lov_layout_state *state)
342 struct lov_layout_raid0 *r0 = &state->raid0;
343 struct lov_stripe_md *lsm = lov->lo_lsm;
346 dump_lsm(D_INODE, lsm);
348 lov_layout_wait(env, lov);
349 if (r0->lo_sub != NULL) {
350 for (i = 0; i < r0->lo_nr; ++i) {
351 struct lovsub_object *los = r0->lo_sub[i];
354 cl_locks_prune(env, &los->lso_cl, 1);
356 * If top-level object is to be evicted from
357 * the cache, so are its sub-objects.
359 lov_subobject_kill(env, lov, los, i);
363 cl_object_prune(env, &lov->lo_cl);
367 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
368 union lov_layout_state *state)
370 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
373 static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
374 union lov_layout_state *state)
376 struct lov_layout_raid0 *r0 = &state->raid0;
378 if (r0->lo_sub != NULL) {
383 dump_lsm(D_INODE, lov->lo_lsm);
384 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)
390 dump_lsm(D_INODE, lov->lo_lsm);
391 lov_free_memmd(&lov->lo_lsm);
394 static int lov_print_empty(const struct lu_env *env, void *cookie,
395 lu_printer_t p, const struct lu_object *o)
397 (*p)(env, cookie, "empty %d\n", lu2lov(o)->lo_layout_invalid);
401 static int lov_print_raid0(const struct lu_env *env, void *cookie,
402 lu_printer_t p, const struct lu_object *o)
404 struct lov_object *lov = lu2lov(o);
405 struct lov_layout_raid0 *r0 = lov_r0(lov);
406 struct lov_stripe_md *lsm = lov->lo_lsm;
409 (*p)(env, cookie, "stripes: %d, %s, lsm{%p 0x%08X %d %u %u}:\n",
410 r0->lo_nr, lov->lo_layout_invalid ? "invalid" : "valid", lsm,
411 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
412 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
413 for (i = 0; i < r0->lo_nr; ++i) {
414 struct lu_object *sub;
416 if (r0->lo_sub[i] != NULL) {
417 sub = lovsub2lu(r0->lo_sub[i]);
418 lu_object_print(env, cookie, p, sub);
420 (*p)(env, cookie, "sub %d absent\n", i);
426 static int lov_print_released(const struct lu_env *env, void *cookie,
427 lu_printer_t p, const struct lu_object *o)
429 struct lov_object *lov = lu2lov(o);
430 struct lov_stripe_md *lsm = lov->lo_lsm;
433 "released: %s, lsm{%p 0x%08X %d %u %u}:\n",
434 lov->lo_layout_invalid ? "invalid" : "valid", lsm,
435 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
436 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
441 * Implements cl_object_operations::coo_attr_get() method for an object
442 * without stripes (LLT_EMPTY layout type).
444 * The only attributes this layer is authoritative in this case is
445 * cl_attr::cat_blocks---it's 0.
447 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
448 struct cl_attr *attr)
450 attr->cat_blocks = 0;
454 static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
455 struct cl_attr *attr)
457 struct lov_object *lov = cl2lov(obj);
458 struct lov_layout_raid0 *r0 = lov_r0(lov);
459 struct cl_attr *lov_attr = &r0->lo_attr;
462 /* this is called w/o holding type guard mutex, so it must be inside
463 * an on going IO otherwise lsm may be replaced.
464 * LU-2117: it turns out there exists one exception. For mmaped files,
465 * the lock of those files may be requested in the other file's IO
466 * context, and this function is called in ccc_lock_state(), it will
467 * hit this assertion.
468 * Anyway, it's still okay to call attr_get w/o type guard as layout
469 * can't go if locks exist. */
470 /* LASSERT(atomic_read(&lsm->lsm_refc) > 1); */
472 if (!r0->lo_attr_valid) {
473 struct lov_stripe_md *lsm = lov->lo_lsm;
474 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
477 memset(lvb, 0, sizeof(*lvb));
478 /* XXX: timestamps can be negative by sanity:test_39m,
480 lvb->lvb_atime = LLONG_MIN;
481 lvb->lvb_ctime = LLONG_MIN;
482 lvb->lvb_mtime = LLONG_MIN;
485 * XXX that should be replaced with a loop over sub-objects,
486 * doing cl_object_attr_get() on them. But for now, let's
487 * reuse old lov code.
491 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
492 * happy. It's not needed, because new code uses
493 * ->coh_attr_guard spin-lock to protect consistency of
494 * sub-object attributes.
496 lov_stripe_lock(lsm);
497 result = lov_merge_lvb_kms(lsm, lvb, &kms);
498 lov_stripe_unlock(lsm);
500 cl_lvb2attr(lov_attr, lvb);
501 lov_attr->cat_kms = kms;
502 r0->lo_attr_valid = 1;
505 if (result == 0) { /* merge results */
506 attr->cat_blocks = lov_attr->cat_blocks;
507 attr->cat_size = lov_attr->cat_size;
508 attr->cat_kms = lov_attr->cat_kms;
509 if (attr->cat_atime < lov_attr->cat_atime)
510 attr->cat_atime = lov_attr->cat_atime;
511 if (attr->cat_ctime < lov_attr->cat_ctime)
512 attr->cat_ctime = lov_attr->cat_ctime;
513 if (attr->cat_mtime < lov_attr->cat_mtime)
514 attr->cat_mtime = lov_attr->cat_mtime;
519 static const struct lov_layout_operations lov_dispatch[] = {
521 .llo_init = lov_init_empty,
522 .llo_delete = lov_delete_empty,
523 .llo_fini = lov_fini_empty,
524 .llo_install = lov_install_empty,
525 .llo_print = lov_print_empty,
526 .llo_page_init = lov_page_init_empty,
527 .llo_lock_init = lov_lock_init_empty,
528 .llo_io_init = lov_io_init_empty,
529 .llo_getattr = lov_attr_get_empty
532 .llo_init = lov_init_raid0,
533 .llo_delete = lov_delete_raid0,
534 .llo_fini = lov_fini_raid0,
535 .llo_install = lov_install_raid0,
536 .llo_print = lov_print_raid0,
537 .llo_page_init = lov_page_init_raid0,
538 .llo_lock_init = lov_lock_init_raid0,
539 .llo_io_init = lov_io_init_raid0,
540 .llo_getattr = lov_attr_get_raid0
543 .llo_init = lov_init_released,
544 .llo_delete = lov_delete_empty,
545 .llo_fini = lov_fini_released,
546 .llo_install = lov_install_empty,
547 .llo_print = lov_print_released,
548 .llo_page_init = lov_page_init_empty,
549 .llo_lock_init = lov_lock_init_empty,
550 .llo_io_init = lov_io_init_released,
551 .llo_getattr = lov_attr_get_empty
556 * Performs a double-dispatch based on the layout type of an object.
558 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
560 struct lov_object *__obj = (obj); \
561 enum lov_layout_type __llt; \
563 __llt = __obj->lo_type; \
564 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
565 lov_dispatch[__llt].op(__VA_ARGS__); \
569 * Return lov_layout_type associated with a given lsm
571 static enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
575 if (lsm_is_released(lsm))
580 static inline void lov_conf_freeze(struct lov_object *lov)
582 if (lov->lo_owner != current)
583 down_read(&lov->lo_type_guard);
586 static inline void lov_conf_thaw(struct lov_object *lov)
588 if (lov->lo_owner != current)
589 up_read(&lov->lo_type_guard);
592 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
594 struct lov_object *__obj = (obj); \
595 int __lock = !!(lock); \
596 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
599 lov_conf_freeze(__obj); \
600 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
602 lov_conf_thaw(__obj); \
607 * Performs a locked double-dispatch based on the layout type of an object.
609 #define LOV_2DISPATCH(obj, op, ...) \
610 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
612 #define LOV_2DISPATCH_VOID(obj, op, ...) \
614 struct lov_object *__obj = (obj); \
615 enum lov_layout_type __llt; \
617 lov_conf_freeze(__obj); \
618 __llt = __obj->lo_type; \
619 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
620 lov_dispatch[__llt].op(__VA_ARGS__); \
621 lov_conf_thaw(__obj); \
624 static void lov_conf_lock(struct lov_object *lov)
626 LASSERT(lov->lo_owner != current);
627 down_write(&lov->lo_type_guard);
628 LASSERT(lov->lo_owner == NULL);
629 lov->lo_owner = current;
632 static void lov_conf_unlock(struct lov_object *lov)
634 lov->lo_owner = NULL;
635 up_write(&lov->lo_type_guard);
638 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
640 struct l_wait_info lwi = { 0 };
642 while (atomic_read(&lov->lo_active_ios) > 0) {
643 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
644 PFID(lu_object_fid(lov2lu(lov))),
645 atomic_read(&lov->lo_active_ios));
647 l_wait_event(lov->lo_waitq,
648 atomic_read(&lov->lo_active_ios) == 0, &lwi);
653 static int lov_layout_change(const struct lu_env *unused,
654 struct lov_object *lov,
655 const struct cl_object_conf *conf)
658 enum lov_layout_type llt = LLT_EMPTY;
659 union lov_layout_state *state = &lov->u;
660 const struct lov_layout_operations *old_ops;
661 const struct lov_layout_operations *new_ops;
663 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
668 LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
670 if (conf->u.coc_md != NULL)
671 llt = lov_type(conf->u.coc_md->lsm);
672 LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
674 cookie = cl_env_reenter();
675 env = cl_env_get(&refcheck);
677 cl_env_reexit(cookie);
681 CDEBUG(D_INODE, DFID" from %s to %s\n",
682 PFID(lu_object_fid(lov2lu(lov))),
683 llt2str(lov->lo_type), llt2str(llt));
685 old_ops = &lov_dispatch[lov->lo_type];
686 new_ops = &lov_dispatch[llt];
688 result = old_ops->llo_delete(env, lov, &lov->u);
690 old_ops->llo_fini(env, lov, &lov->u);
692 LASSERT(atomic_read(&lov->lo_active_ios) == 0);
693 LASSERT(hdr->coh_tree.rnode == NULL);
694 LASSERT(hdr->coh_pages == 0);
696 lov->lo_type = LLT_EMPTY;
697 result = new_ops->llo_init(env,
698 lu2lov_dev(lov->lo_cl.co_lu.lo_dev),
701 new_ops->llo_install(env, lov, state);
704 new_ops->llo_delete(env, lov, state);
705 new_ops->llo_fini(env, lov, state);
706 /* this file becomes an EMPTY file. */
710 cl_env_put(env, &refcheck);
711 cl_env_reexit(cookie);
715 /*****************************************************************************
717 * Lov object operations.
720 int lov_object_init(const struct lu_env *env, struct lu_object *obj,
721 const struct lu_object_conf *conf)
723 struct lov_device *dev = lu2lov_dev(obj->lo_dev);
724 struct lov_object *lov = lu2lov(obj);
725 const struct cl_object_conf *cconf = lu2cl_conf(conf);
726 union lov_layout_state *set = &lov->u;
727 const struct lov_layout_operations *ops;
730 init_rwsem(&lov->lo_type_guard);
731 atomic_set(&lov->lo_active_ios, 0);
732 init_waitqueue_head(&lov->lo_waitq);
734 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
736 /* no locking is necessary, as object is being created */
737 lov->lo_type = lov_type(cconf->u.coc_md->lsm);
738 ops = &lov_dispatch[lov->lo_type];
739 result = ops->llo_init(env, dev, lov, cconf, set);
741 ops->llo_install(env, lov, set);
745 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
746 const struct cl_object_conf *conf)
748 struct lov_stripe_md *lsm = NULL;
749 struct lov_object *lov = cl2lov(obj);
753 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
754 lov->lo_layout_invalid = true;
759 if (conf->coc_opc == OBJECT_CONF_WAIT) {
760 if (lov->lo_layout_invalid &&
761 atomic_read(&lov->lo_active_ios) > 0) {
762 lov_conf_unlock(lov);
763 result = lov_layout_wait(env, lov);
769 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
771 if (conf->u.coc_md != NULL)
772 lsm = conf->u.coc_md->lsm;
773 if ((lsm == NULL && lov->lo_lsm == NULL) ||
774 ((lsm != NULL && lov->lo_lsm != NULL) &&
775 (lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
776 (lov->lo_lsm->lsm_pattern == lsm->lsm_pattern))) {
777 /* same version of layout */
778 lov->lo_layout_invalid = false;
783 /* will change layout - check if there still exists active IO. */
784 if (atomic_read(&lov->lo_active_ios) > 0) {
785 lov->lo_layout_invalid = true;
790 lov->lo_layout_invalid = lov_layout_change(env, lov, conf);
793 lov_conf_unlock(lov);
794 CDEBUG(D_INODE, DFID" lo_layout_invalid=%d\n",
795 PFID(lu_object_fid(lov2lu(lov))), lov->lo_layout_invalid);
799 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
801 struct lov_object *lov = lu2lov(obj);
803 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
806 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
808 struct lov_object *lov = lu2lov(obj);
810 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
812 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
815 static int lov_object_print(const struct lu_env *env, void *cookie,
816 lu_printer_t p, const struct lu_object *o)
818 return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
821 int lov_page_init(const struct lu_env *env, struct cl_object *obj,
822 struct cl_page *page, struct page *vmpage)
824 return LOV_2DISPATCH_NOLOCK(cl2lov(obj),
825 llo_page_init, env, obj, page, vmpage);
829 * Implements cl_object_operations::clo_io_init() method for lov
830 * layer. Dispatches to the appropriate layout io initialization method.
832 int lov_io_init(const struct lu_env *env, struct cl_object *obj,
835 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
836 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
837 !io->ci_ignore_layout, env, obj, io);
841 * An implementation of cl_object_operations::clo_attr_get() method for lov
842 * layer. For raid0 layout this collects and merges attributes of all
845 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
846 struct cl_attr *attr)
848 /* do not take lock, as this function is called under a
849 * spin-lock. Layout is protected from changing by ongoing IO. */
850 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
853 static int lov_attr_set(const struct lu_env *env, struct cl_object *obj,
854 const struct cl_attr *attr, unsigned valid)
857 * No dispatch is required here, as no layout implements this.
862 int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
863 struct cl_lock *lock, const struct cl_io *io)
865 /* No need to lock because we've taken one refcount of layout. */
866 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
870 static const struct cl_object_operations lov_ops = {
871 .coo_page_init = lov_page_init,
872 .coo_lock_init = lov_lock_init,
873 .coo_io_init = lov_io_init,
874 .coo_attr_get = lov_attr_get,
875 .coo_attr_set = lov_attr_set,
876 .coo_conf_set = lov_conf_set
879 static const struct lu_object_operations lov_lu_obj_ops = {
880 .loo_object_init = lov_object_init,
881 .loo_object_delete = lov_object_delete,
882 .loo_object_release = NULL,
883 .loo_object_free = lov_object_free,
884 .loo_object_print = lov_object_print,
885 .loo_object_invariant = NULL
888 struct lu_object *lov_object_alloc(const struct lu_env *env,
889 const struct lu_object_header *unused,
890 struct lu_device *dev)
892 struct lov_object *lov;
893 struct lu_object *obj;
895 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, GFP_NOFS);
898 lu_object_init(obj, NULL, dev);
899 lov->lo_cl.co_ops = &lov_ops;
900 lov->lo_type = -1; /* invalid, to catch uninitialized type */
902 * object io operation vector (cl_object::co_iop) is installed
903 * later in lov_object_init(), as different vectors are used
904 * for object with different layouts.
906 obj->lo_ops = &lov_lu_obj_ops;
912 struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
914 struct lov_stripe_md *lsm = NULL;
916 lov_conf_freeze(lov);
917 if (lov->lo_lsm != NULL) {
918 lsm = lsm_addref(lov->lo_lsm);
919 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
920 lsm, atomic_read(&lsm->lsm_refc),
921 lov->lo_layout_invalid, current);
927 void lov_lsm_decref(struct lov_object *lov, struct lov_stripe_md *lsm)
932 CDEBUG(D_INODE, "lsm %p decref %d by %p.\n",
933 lsm, atomic_read(&lsm->lsm_refc), current);
935 lov_free_memmd(&lsm);
938 struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
940 struct lu_object *luobj;
941 struct lov_stripe_md *lsm = NULL;
946 luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
949 lsm = lov_lsm_addref(lu2lov(luobj));
952 EXPORT_SYMBOL(lov_lsm_get);
954 void lov_lsm_put(struct cl_object *unused, struct lov_stripe_md *lsm)
957 lov_free_memmd(&lsm);
959 EXPORT_SYMBOL(lov_lsm_put);
961 int lov_read_and_clear_async_rc(struct cl_object *clob)
963 struct lu_object *luobj;
966 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
969 struct lov_object *lov = lu2lov(luobj);
971 lov_conf_freeze(lov);
972 switch (lov->lo_type) {
974 struct lov_stripe_md *lsm;
978 LASSERT(lsm != NULL);
979 for (i = 0; i < lsm->lsm_stripe_count; i++) {
980 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
982 if (lov_oinfo_is_dummy(loi))
985 if (loi->loi_ar.ar_rc && !rc)
986 rc = loi->loi_ar.ar_rc;
987 loi->loi_ar.ar_rc = 0;
1000 EXPORT_SYMBOL(lov_read_and_clear_async_rc);