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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, struct lov_layout_raid0 *r0,
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);
149 oinfo = lov->lo_lsm->lsm_oinfo[idx];
150 CDEBUG(D_INODE, DFID"@%p[%d] -> "DFID"@%p: ostid: "DOSTID
151 " idx: %d gen: %d\n",
152 PFID(&subhdr->coh_lu.loh_fid), subhdr, idx,
153 PFID(&hdr->coh_lu.loh_fid), hdr, POSTID(&oinfo->loi_oi),
154 oinfo->loi_ost_idx, oinfo->loi_ost_gen);
156 /* reuse ->coh_attr_guard to protect coh_parent change */
157 spin_lock(&subhdr->coh_attr_guard);
158 parent = subhdr->coh_parent;
159 if (parent == NULL) {
160 subhdr->coh_parent = hdr;
161 spin_unlock(&subhdr->coh_attr_guard);
162 subhdr->coh_nesting = hdr->coh_nesting + 1;
163 lu_object_ref_add(&stripe->co_lu, "lov-parent", lov);
164 r0->lo_sub[idx] = cl2lovsub(stripe);
165 r0->lo_sub[idx]->lso_super = lov;
166 r0->lo_sub[idx]->lso_index = idx;
169 struct lu_object *old_obj;
170 struct lov_object *old_lov;
171 unsigned int mask = D_INODE;
173 spin_unlock(&subhdr->coh_attr_guard);
174 old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
175 LASSERT(old_obj != NULL);
176 old_lov = cl2lov(lu2cl(old_obj));
177 if (old_lov->lo_layout_invalid) {
178 /* the object's layout has already changed but isn't
180 lu_object_unhash(env, &stripe->co_lu);
187 LU_OBJECT_DEBUG(mask, env, &stripe->co_lu,
188 "stripe %d is already owned.\n", idx);
189 LU_OBJECT_DEBUG(mask, env, old_obj, "owned.\n");
190 LU_OBJECT_HEADER(mask, env, lov2lu(lov), "try to own.\n");
191 cl_object_put(env, stripe);
196 static int lov_init_raid0(const struct lu_env *env,
197 struct lov_device *dev, struct lov_object *lov,
198 const struct cl_object_conf *conf,
199 union lov_layout_state *state)
204 struct cl_object *stripe;
205 struct lov_thread_info *lti = lov_env_info(env);
206 struct cl_object_conf *subconf = <i->lti_stripe_conf;
207 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
208 struct lu_fid *ofid = <i->lti_fid;
209 struct lov_layout_raid0 *r0 = &state->raid0;
213 if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3) {
214 dump_lsm(D_ERROR, lsm);
215 LASSERTF(0, "magic mismatch, expected %d/%d, actual %d.\n",
216 LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
219 LASSERT(lov->lo_lsm == NULL);
220 lov->lo_lsm = lsm_addref(lsm);
221 r0->lo_nr = lsm->lsm_stripe_count;
222 LASSERT(r0->lo_nr <= lov_targets_nr(dev));
224 OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
225 if (r0->lo_sub != NULL) {
227 subconf->coc_inode = conf->coc_inode;
228 spin_lock_init(&r0->lo_sub_lock);
230 * Create stripe cl_objects.
232 for (i = 0; i < r0->lo_nr && result == 0; ++i) {
233 struct cl_device *subdev;
234 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
235 int ost_idx = oinfo->loi_ost_idx;
237 result = ostid_to_fid(ofid, &oinfo->loi_oi,
242 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
243 subconf->u.coc_oinfo = oinfo;
244 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
245 /* In the function below, .hs_keycmp resolves to
246 * lu_obj_hop_keycmp() */
247 /* coverity[overrun-buffer-val] */
248 stripe = lov_sub_find(env, subdev, ofid, subconf);
249 if (!IS_ERR(stripe)) {
250 result = lov_init_sub(env, lov, stripe, r0, i);
251 if (result == -EAGAIN) { /* try again */
256 result = PTR_ERR(stripe);
265 static int lov_init_released(const struct lu_env *env,
266 struct lov_device *dev, struct lov_object *lov,
267 const struct cl_object_conf *conf,
268 union lov_layout_state *state)
270 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
272 LASSERT(lsm != NULL);
273 LASSERT(lsm_is_released(lsm));
274 LASSERT(lov->lo_lsm == NULL);
276 lov->lo_lsm = lsm_addref(lsm);
280 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
281 union lov_layout_state *state)
283 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
285 lov_layout_wait(env, lov);
287 cl_object_prune(env, &lov->lo_cl);
291 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
292 struct lovsub_object *los, int idx)
294 struct cl_object *sub;
295 struct lov_layout_raid0 *r0;
296 struct lu_site *site;
297 struct lu_site_bkt_data *bkt;
298 wait_queue_t *waiter;
301 LASSERT(r0->lo_sub[idx] == los);
303 sub = lovsub2cl(los);
304 site = sub->co_lu.lo_dev->ld_site;
305 bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
307 cl_object_kill(env, sub);
308 /* release a reference to the sub-object and ... */
309 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
310 cl_object_put(env, sub);
312 /* ... wait until it is actually destroyed---sub-object clears its
313 * ->lo_sub[] slot in lovsub_object_fini() */
314 if (r0->lo_sub[idx] == los) {
315 waiter = &lov_env_info(env)->lti_waiter;
316 init_waitqueue_entry_current(waiter);
317 add_wait_queue(&bkt->lsb_marche_funebre, waiter);
318 set_current_state(TASK_UNINTERRUPTIBLE);
320 /* this wait-queue is signaled at the end of
321 * lu_object_free(). */
322 set_current_state(TASK_UNINTERRUPTIBLE);
323 spin_lock(&r0->lo_sub_lock);
324 if (r0->lo_sub[idx] == los) {
325 spin_unlock(&r0->lo_sub_lock);
326 waitq_wait(waiter, TASK_UNINTERRUPTIBLE);
328 spin_unlock(&r0->lo_sub_lock);
329 set_current_state(TASK_RUNNING);
333 remove_wait_queue(&bkt->lsb_marche_funebre, waiter);
335 LASSERT(r0->lo_sub[idx] == NULL);
338 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
339 union lov_layout_state *state)
341 struct lov_layout_raid0 *r0 = &state->raid0;
342 struct lov_stripe_md *lsm = lov->lo_lsm;
347 dump_lsm(D_INODE, lsm);
349 lov_layout_wait(env, lov);
350 if (r0->lo_sub != NULL) {
351 for (i = 0; i < r0->lo_nr; ++i) {
352 struct lovsub_object *los = r0->lo_sub[i];
355 cl_locks_prune(env, &los->lso_cl, 1);
357 * If top-level object is to be evicted from
358 * the cache, so are its sub-objects.
360 lov_subobject_kill(env, lov, los, i);
364 cl_object_prune(env, &lov->lo_cl);
368 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
369 union lov_layout_state *state)
371 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
374 static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
375 union lov_layout_state *state)
377 struct lov_layout_raid0 *r0 = &state->raid0;
380 if (r0->lo_sub != NULL) {
381 OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
385 dump_lsm(D_INODE, lov->lo_lsm);
386 lov_free_memmd(&lov->lo_lsm);
391 static void lov_fini_released(const struct lu_env *env, struct lov_object *lov,
392 union lov_layout_state *state)
395 dump_lsm(D_INODE, lov->lo_lsm);
396 lov_free_memmd(&lov->lo_lsm);
400 static int lov_print_empty(const struct lu_env *env, void *cookie,
401 lu_printer_t p, const struct lu_object *o)
403 (*p)(env, cookie, "empty %d\n", lu2lov(o)->lo_layout_invalid);
407 static int lov_print_raid0(const struct lu_env *env, void *cookie,
408 lu_printer_t p, const struct lu_object *o)
410 struct lov_object *lov = lu2lov(o);
411 struct lov_layout_raid0 *r0 = lov_r0(lov);
412 struct lov_stripe_md *lsm = lov->lo_lsm;
415 (*p)(env, cookie, "stripes: %d, %s, lsm{%p 0x%08X %d %u %u}:\n",
416 r0->lo_nr, lov->lo_layout_invalid ? "invalid" : "valid", lsm,
417 lsm->lsm_magic, cfs_atomic_read(&lsm->lsm_refc),
418 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
419 for (i = 0; i < r0->lo_nr; ++i) {
420 struct lu_object *sub;
422 if (r0->lo_sub[i] != NULL) {
423 sub = lovsub2lu(r0->lo_sub[i]);
424 lu_object_print(env, cookie, p, sub);
426 (*p)(env, cookie, "sub %d absent\n", i);
432 static int lov_print_released(const struct lu_env *env, void *cookie,
433 lu_printer_t p, const struct lu_object *o)
435 struct lov_object *lov = lu2lov(o);
436 struct lov_stripe_md *lsm = lov->lo_lsm;
439 "released: %s, lsm{%p 0x%08X %d %u %u}:\n",
440 lov->lo_layout_invalid ? "invalid" : "valid", lsm,
441 lsm->lsm_magic, cfs_atomic_read(&lsm->lsm_refc),
442 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
447 * Implements cl_object_operations::coo_attr_get() method for an object
448 * without stripes (LLT_EMPTY layout type).
450 * The only attributes this layer is authoritative in this case is
451 * cl_attr::cat_blocks---it's 0.
453 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
454 struct cl_attr *attr)
456 attr->cat_blocks = 0;
460 static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
461 struct cl_attr *attr)
463 struct lov_object *lov = cl2lov(obj);
464 struct lov_layout_raid0 *r0 = lov_r0(lov);
465 struct cl_attr *lov_attr = &r0->lo_attr;
470 /* this is called w/o holding type guard mutex, so it must be inside
471 * an on going IO otherwise lsm may be replaced.
472 * LU-2117: it turns out there exists one exception. For mmaped files,
473 * the lock of those files may be requested in the other file's IO
474 * context, and this function is called in ccc_lock_state(), it will
475 * hit this assertion.
476 * Anyway, it's still okay to call attr_get w/o type guard as layout
477 * can't go if locks exist. */
478 /* LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 1); */
480 if (!r0->lo_attr_valid) {
481 struct lov_stripe_md *lsm = lov->lo_lsm;
482 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
485 memset(lvb, 0, sizeof(*lvb));
486 /* XXX: timestamps can be negative by sanity:test_39m,
488 lvb->lvb_atime = LLONG_MIN;
489 lvb->lvb_ctime = LLONG_MIN;
490 lvb->lvb_mtime = LLONG_MIN;
493 * XXX that should be replaced with a loop over sub-objects,
494 * doing cl_object_attr_get() on them. But for now, let's
495 * reuse old lov code.
499 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
500 * happy. It's not needed, because new code uses
501 * ->coh_attr_guard spin-lock to protect consistency of
502 * sub-object attributes.
504 lov_stripe_lock(lsm);
505 result = lov_merge_lvb_kms(lsm, lvb, &kms);
506 lov_stripe_unlock(lsm);
508 cl_lvb2attr(lov_attr, lvb);
509 lov_attr->cat_kms = kms;
510 r0->lo_attr_valid = 1;
513 if (result == 0) { /* merge results */
514 attr->cat_blocks = lov_attr->cat_blocks;
515 attr->cat_size = lov_attr->cat_size;
516 attr->cat_kms = lov_attr->cat_kms;
517 if (attr->cat_atime < lov_attr->cat_atime)
518 attr->cat_atime = lov_attr->cat_atime;
519 if (attr->cat_ctime < lov_attr->cat_ctime)
520 attr->cat_ctime = lov_attr->cat_ctime;
521 if (attr->cat_mtime < lov_attr->cat_mtime)
522 attr->cat_mtime = lov_attr->cat_mtime;
527 const static struct lov_layout_operations lov_dispatch[] = {
529 .llo_init = lov_init_empty,
530 .llo_delete = lov_delete_empty,
531 .llo_fini = lov_fini_empty,
532 .llo_install = lov_install_empty,
533 .llo_print = lov_print_empty,
534 .llo_page_init = lov_page_init_empty,
535 .llo_lock_init = lov_lock_init_empty,
536 .llo_io_init = lov_io_init_empty,
537 .llo_getattr = lov_attr_get_empty
540 .llo_init = lov_init_raid0,
541 .llo_delete = lov_delete_raid0,
542 .llo_fini = lov_fini_raid0,
543 .llo_install = lov_install_raid0,
544 .llo_print = lov_print_raid0,
545 .llo_page_init = lov_page_init_raid0,
546 .llo_lock_init = lov_lock_init_raid0,
547 .llo_io_init = lov_io_init_raid0,
548 .llo_getattr = lov_attr_get_raid0
551 .llo_init = lov_init_released,
552 .llo_delete = lov_delete_empty,
553 .llo_fini = lov_fini_released,
554 .llo_install = lov_install_empty,
555 .llo_print = lov_print_released,
556 .llo_page_init = lov_page_init_empty,
557 .llo_lock_init = lov_lock_init_empty,
558 .llo_io_init = lov_io_init_released,
559 .llo_getattr = lov_attr_get_empty
564 * Performs a double-dispatch based on the layout type of an object.
566 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
568 struct lov_object *__obj = (obj); \
569 enum lov_layout_type __llt; \
571 __llt = __obj->lo_type; \
572 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
573 lov_dispatch[__llt].op(__VA_ARGS__); \
577 * Return lov_layout_type associated with a given lsm
579 enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
583 if (lsm_is_released(lsm))
588 static inline void lov_conf_freeze(struct lov_object *lov)
590 if (lov->lo_owner != cfs_current())
591 down_read(&lov->lo_type_guard);
594 static inline void lov_conf_thaw(struct lov_object *lov)
596 if (lov->lo_owner != cfs_current())
597 up_read(&lov->lo_type_guard);
600 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
602 struct lov_object *__obj = (obj); \
603 int __lock = !!(lock); \
604 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
607 lov_conf_freeze(__obj); \
608 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
610 lov_conf_thaw(__obj); \
615 * Performs a locked double-dispatch based on the layout type of an object.
617 #define LOV_2DISPATCH(obj, op, ...) \
618 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
620 #define LOV_2DISPATCH_VOID(obj, op, ...) \
622 struct lov_object *__obj = (obj); \
623 enum lov_layout_type __llt; \
625 lov_conf_freeze(__obj); \
626 __llt = __obj->lo_type; \
627 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
628 lov_dispatch[__llt].op(__VA_ARGS__); \
629 lov_conf_thaw(__obj); \
632 static void lov_conf_lock(struct lov_object *lov)
634 LASSERT(lov->lo_owner != cfs_current());
635 down_write(&lov->lo_type_guard);
636 LASSERT(lov->lo_owner == NULL);
637 lov->lo_owner = cfs_current();
640 static void lov_conf_unlock(struct lov_object *lov)
642 lov->lo_owner = NULL;
643 up_write(&lov->lo_type_guard);
646 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
648 struct l_wait_info lwi = { 0 };
651 while (cfs_atomic_read(&lov->lo_active_ios) > 0) {
652 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
653 PFID(lu_object_fid(lov2lu(lov))),
654 cfs_atomic_read(&lov->lo_active_ios));
656 l_wait_event(lov->lo_waitq,
657 cfs_atomic_read(&lov->lo_active_ios) == 0, &lwi);
662 static int lov_layout_change(const struct lu_env *unused,
663 struct lov_object *lov,
664 const struct cl_object_conf *conf)
667 enum lov_layout_type llt = LLT_EMPTY;
668 union lov_layout_state *state = &lov->u;
669 const struct lov_layout_operations *old_ops;
670 const struct lov_layout_operations *new_ops;
672 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
678 LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
680 if (conf->u.coc_md != NULL)
681 llt = lov_type(conf->u.coc_md->lsm);
682 LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
684 cookie = cl_env_reenter();
685 env = cl_env_get(&refcheck);
687 cl_env_reexit(cookie);
688 RETURN(PTR_ERR(env));
691 CDEBUG(D_INODE, DFID" from %s to %s\n",
692 PFID(lu_object_fid(lov2lu(lov))),
693 llt2str(lov->lo_type), llt2str(llt));
695 old_ops = &lov_dispatch[lov->lo_type];
696 new_ops = &lov_dispatch[llt];
698 result = old_ops->llo_delete(env, lov, &lov->u);
700 old_ops->llo_fini(env, lov, &lov->u);
702 LASSERT(cfs_atomic_read(&lov->lo_active_ios) == 0);
703 LASSERT(hdr->coh_tree.rnode == NULL);
704 LASSERT(hdr->coh_pages == 0);
706 lov->lo_type = LLT_EMPTY;
707 result = new_ops->llo_init(env,
708 lu2lov_dev(lov->lo_cl.co_lu.lo_dev),
711 new_ops->llo_install(env, lov, state);
714 new_ops->llo_delete(env, lov, state);
715 new_ops->llo_fini(env, lov, state);
716 /* this file becomes an EMPTY file. */
720 cl_env_put(env, &refcheck);
721 cl_env_reexit(cookie);
725 /*****************************************************************************
727 * Lov object operations.
730 int lov_object_init(const struct lu_env *env, struct lu_object *obj,
731 const struct lu_object_conf *conf)
733 struct lov_device *dev = lu2lov_dev(obj->lo_dev);
734 struct lov_object *lov = lu2lov(obj);
735 const struct cl_object_conf *cconf = lu2cl_conf(conf);
736 union lov_layout_state *set = &lov->u;
737 const struct lov_layout_operations *ops;
741 init_rwsem(&lov->lo_type_guard);
742 cfs_atomic_set(&lov->lo_active_ios, 0);
743 init_waitqueue_head(&lov->lo_waitq);
745 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
747 /* no locking is necessary, as object is being created */
748 lov->lo_type = lov_type(cconf->u.coc_md->lsm);
749 ops = &lov_dispatch[lov->lo_type];
750 result = ops->llo_init(env, dev, lov, cconf, set);
752 ops->llo_install(env, lov, set);
756 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
757 const struct cl_object_conf *conf)
759 struct lov_stripe_md *lsm = NULL;
760 struct lov_object *lov = cl2lov(obj);
765 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
766 lov->lo_layout_invalid = true;
767 GOTO(out, result = 0);
770 if (conf->coc_opc == OBJECT_CONF_WAIT) {
771 if (lov->lo_layout_invalid &&
772 cfs_atomic_read(&lov->lo_active_ios) > 0) {
773 lov_conf_unlock(lov);
774 result = lov_layout_wait(env, lov);
780 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
782 if (conf->u.coc_md != NULL)
783 lsm = conf->u.coc_md->lsm;
784 if ((lsm == NULL && lov->lo_lsm == NULL) ||
785 ((lsm != NULL && lov->lo_lsm != NULL) &&
786 (lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
787 (lov->lo_lsm->lsm_pattern == lsm->lsm_pattern))) {
788 /* same version of layout */
789 lov->lo_layout_invalid = false;
790 GOTO(out, result = 0);
793 /* will change layout - check if there still exists active IO. */
794 if (cfs_atomic_read(&lov->lo_active_ios) > 0) {
795 lov->lo_layout_invalid = true;
796 GOTO(out, result = -EBUSY);
799 lov->lo_layout_invalid = lov_layout_change(env, lov, conf);
803 lov_conf_unlock(lov);
804 CDEBUG(D_INODE, DFID" lo_layout_invalid=%d\n",
805 PFID(lu_object_fid(lov2lu(lov))), lov->lo_layout_invalid);
809 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
811 struct lov_object *lov = lu2lov(obj);
814 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
818 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
820 struct lov_object *lov = lu2lov(obj);
823 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
825 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
829 static int lov_object_print(const struct lu_env *env, void *cookie,
830 lu_printer_t p, const struct lu_object *o)
832 return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
835 int lov_page_init(const struct lu_env *env, struct cl_object *obj,
836 struct cl_page *page, struct page *vmpage)
838 return LOV_2DISPATCH_NOLOCK(cl2lov(obj),
839 llo_page_init, env, obj, page, vmpage);
843 * Implements cl_object_operations::clo_io_init() method for lov
844 * layer. Dispatches to the appropriate layout io initialization method.
846 int lov_io_init(const struct lu_env *env, struct cl_object *obj,
849 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
850 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
851 !io->ci_ignore_layout, env, obj, io);
855 * An implementation of cl_object_operations::clo_attr_get() method for lov
856 * layer. For raid0 layout this collects and merges attributes of all
859 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
860 struct cl_attr *attr)
862 /* do not take lock, as this function is called under a
863 * spin-lock. Layout is protected from changing by ongoing IO. */
864 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
867 static int lov_attr_set(const struct lu_env *env, struct cl_object *obj,
868 const struct cl_attr *attr, unsigned valid)
871 * No dispatch is required here, as no layout implements this.
876 int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
877 struct cl_lock *lock, const struct cl_io *io)
879 /* No need to lock because we've taken one refcount of layout. */
880 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
884 static const struct cl_object_operations lov_ops = {
885 .coo_page_init = lov_page_init,
886 .coo_lock_init = lov_lock_init,
887 .coo_io_init = lov_io_init,
888 .coo_attr_get = lov_attr_get,
889 .coo_attr_set = lov_attr_set,
890 .coo_conf_set = lov_conf_set
893 static const struct lu_object_operations lov_lu_obj_ops = {
894 .loo_object_init = lov_object_init,
895 .loo_object_delete = lov_object_delete,
896 .loo_object_release = NULL,
897 .loo_object_free = lov_object_free,
898 .loo_object_print = lov_object_print,
899 .loo_object_invariant = NULL
902 struct lu_object *lov_object_alloc(const struct lu_env *env,
903 const struct lu_object_header *unused,
904 struct lu_device *dev)
906 struct lov_object *lov;
907 struct lu_object *obj;
910 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, __GFP_IO);
913 lu_object_init(obj, NULL, dev);
914 lov->lo_cl.co_ops = &lov_ops;
915 lov->lo_type = -1; /* invalid, to catch uninitialized type */
917 * object io operation vector (cl_object::co_iop) is installed
918 * later in lov_object_init(), as different vectors are used
919 * for object with different layouts.
921 obj->lo_ops = &lov_lu_obj_ops;
927 struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
929 struct lov_stripe_md *lsm = NULL;
931 lov_conf_freeze(lov);
932 if (lov->lo_lsm != NULL) {
933 lsm = lsm_addref(lov->lo_lsm);
934 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
935 lsm, cfs_atomic_read(&lsm->lsm_refc),
936 lov->lo_layout_invalid, cfs_current());
942 void lov_lsm_decref(struct lov_object *lov, struct lov_stripe_md *lsm)
947 CDEBUG(D_INODE, "lsm %p decref %d by %p.\n",
948 lsm, cfs_atomic_read(&lsm->lsm_refc), cfs_current());
950 lov_free_memmd(&lsm);
953 struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
955 struct lu_object *luobj;
956 struct lov_stripe_md *lsm = NULL;
961 luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
964 lsm = lov_lsm_addref(lu2lov(luobj));
967 EXPORT_SYMBOL(lov_lsm_get);
969 void lov_lsm_put(struct cl_object *unused, struct lov_stripe_md *lsm)
972 lov_free_memmd(&lsm);
974 EXPORT_SYMBOL(lov_lsm_put);
976 int lov_read_and_clear_async_rc(struct cl_object *clob)
978 struct lu_object *luobj;
982 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
985 struct lov_object *lov = lu2lov(luobj);
987 lov_conf_freeze(lov);
988 switch (lov->lo_type) {
990 struct lov_stripe_md *lsm;
994 LASSERT(lsm != NULL);
995 for (i = 0; i < lsm->lsm_stripe_count; i++) {
996 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
997 if (loi->loi_ar.ar_rc && !rc)
998 rc = loi->loi_ar.ar_rc;
999 loi->loi_ar.ar_rc = 0;
1012 EXPORT_SYMBOL(lov_read_and_clear_async_rc);