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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, pgoff_t index);
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_page_slice_fixup(struct lov_object *lov,
197 struct cl_object *stripe)
199 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
202 cl_object_for_each(o, stripe)
203 o->co_slice_off += hdr->coh_page_bufsize;
205 return cl_object_header(stripe)->coh_page_bufsize;
208 static int lov_init_raid0(const struct lu_env *env,
209 struct lov_device *dev, struct lov_object *lov,
210 const struct cl_object_conf *conf,
211 union lov_layout_state *state)
216 struct cl_object *stripe;
217 struct lov_thread_info *lti = lov_env_info(env);
218 struct cl_object_conf *subconf = <i->lti_stripe_conf;
219 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
220 struct lu_fid *ofid = <i->lti_fid;
221 struct lov_layout_raid0 *r0 = &state->raid0;
225 if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3) {
226 dump_lsm(D_ERROR, lsm);
227 LASSERTF(0, "magic mismatch, expected %d/%d, actual %d.\n",
228 LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
231 LASSERT(lov->lo_lsm == NULL);
232 lov->lo_lsm = lsm_addref(lsm);
233 r0->lo_nr = lsm->lsm_stripe_count;
234 LASSERT(r0->lo_nr <= lov_targets_nr(dev));
236 OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
237 if (r0->lo_sub != NULL) {
241 subconf->coc_inode = conf->coc_inode;
242 spin_lock_init(&r0->lo_sub_lock);
244 * Create stripe cl_objects.
246 for (i = 0; i < r0->lo_nr && result == 0; ++i) {
247 struct cl_device *subdev;
248 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
249 int ost_idx = oinfo->loi_ost_idx;
251 result = ostid_to_fid(ofid, &oinfo->loi_oi,
256 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
257 subconf->u.coc_oinfo = oinfo;
258 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
259 /* In the function below, .hs_keycmp resolves to
260 * lu_obj_hop_keycmp() */
261 /* coverity[overrun-buffer-val] */
262 stripe = lov_sub_find(env, subdev, ofid, subconf);
263 if (!IS_ERR(stripe)) {
264 result = lov_init_sub(env, lov, stripe, r0, i);
265 if (result == -EAGAIN) { /* try again */
271 result = PTR_ERR(stripe);
275 int sz = lov_page_slice_fixup(lov, stripe);
276 LASSERT(ergo(psz > 0, psz == sz));
281 cl_object_header(&lov->lo_cl)->coh_page_bufsize += psz;
288 static int lov_init_released(const struct lu_env *env,
289 struct lov_device *dev, struct lov_object *lov,
290 const struct cl_object_conf *conf,
291 union lov_layout_state *state)
293 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
295 LASSERT(lsm != NULL);
296 LASSERT(lsm_is_released(lsm));
297 LASSERT(lov->lo_lsm == NULL);
299 lov->lo_lsm = lsm_addref(lsm);
303 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
304 union lov_layout_state *state)
306 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
308 lov_layout_wait(env, lov);
310 cl_locks_prune(env, &lov->lo_cl, 0);
314 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
315 struct lovsub_object *los, int idx)
317 struct cl_object *sub;
318 struct lov_layout_raid0 *r0;
319 struct lu_site *site;
320 struct lu_site_bkt_data *bkt;
321 wait_queue_t *waiter;
324 LASSERT(r0->lo_sub[idx] == los);
326 sub = lovsub2cl(los);
327 site = sub->co_lu.lo_dev->ld_site;
328 bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
330 cl_object_kill(env, sub);
331 /* release a reference to the sub-object and ... */
332 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
333 cl_object_put(env, sub);
335 /* ... wait until it is actually destroyed---sub-object clears its
336 * ->lo_sub[] slot in lovsub_object_fini() */
337 if (r0->lo_sub[idx] == los) {
338 waiter = &lov_env_info(env)->lti_waiter;
339 init_waitqueue_entry_current(waiter);
340 add_wait_queue(&bkt->lsb_marche_funebre, waiter);
341 set_current_state(TASK_UNINTERRUPTIBLE);
343 /* this wait-queue is signaled at the end of
344 * lu_object_free(). */
345 set_current_state(TASK_UNINTERRUPTIBLE);
346 spin_lock(&r0->lo_sub_lock);
347 if (r0->lo_sub[idx] == los) {
348 spin_unlock(&r0->lo_sub_lock);
349 waitq_wait(waiter, TASK_UNINTERRUPTIBLE);
351 spin_unlock(&r0->lo_sub_lock);
352 set_current_state(TASK_RUNNING);
356 remove_wait_queue(&bkt->lsb_marche_funebre, waiter);
358 LASSERT(r0->lo_sub[idx] == NULL);
361 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
362 union lov_layout_state *state)
364 struct lov_layout_raid0 *r0 = &state->raid0;
365 struct lov_stripe_md *lsm = lov->lo_lsm;
370 dump_lsm(D_INODE, lsm);
372 lov_layout_wait(env, lov);
373 if (r0->lo_sub != NULL) {
374 for (i = 0; i < r0->lo_nr; ++i) {
375 struct lovsub_object *los = r0->lo_sub[i];
378 cl_locks_prune(env, &los->lso_cl, 1);
380 * If top-level object is to be evicted from
381 * the cache, so are its sub-objects.
383 lov_subobject_kill(env, lov, los, i);
387 cl_locks_prune(env, &lov->lo_cl, 0);
391 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
392 union lov_layout_state *state)
394 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
397 static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
398 union lov_layout_state *state)
400 struct lov_layout_raid0 *r0 = &state->raid0;
403 if (r0->lo_sub != NULL) {
404 OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
408 dump_lsm(D_INODE, lov->lo_lsm);
409 lov_free_memmd(&lov->lo_lsm);
414 static void lov_fini_released(const struct lu_env *env, struct lov_object *lov,
415 union lov_layout_state *state)
418 dump_lsm(D_INODE, lov->lo_lsm);
419 lov_free_memmd(&lov->lo_lsm);
423 static int lov_print_empty(const struct lu_env *env, void *cookie,
424 lu_printer_t p, const struct lu_object *o)
426 (*p)(env, cookie, "empty %d\n", lu2lov(o)->lo_layout_invalid);
430 static int lov_print_raid0(const struct lu_env *env, void *cookie,
431 lu_printer_t p, const struct lu_object *o)
433 struct lov_object *lov = lu2lov(o);
434 struct lov_layout_raid0 *r0 = lov_r0(lov);
435 struct lov_stripe_md *lsm = lov->lo_lsm;
438 (*p)(env, cookie, "stripes: %d, %s, lsm{%p 0x%08X %d %u %u}:\n",
439 r0->lo_nr, lov->lo_layout_invalid ? "invalid" : "valid", lsm,
440 lsm->lsm_magic, cfs_atomic_read(&lsm->lsm_refc),
441 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
442 for (i = 0; i < r0->lo_nr; ++i) {
443 struct lu_object *sub;
445 if (r0->lo_sub[i] != NULL) {
446 sub = lovsub2lu(r0->lo_sub[i]);
447 lu_object_print(env, cookie, p, sub);
449 (*p)(env, cookie, "sub %d absent\n", i);
455 static int lov_print_released(const struct lu_env *env, void *cookie,
456 lu_printer_t p, const struct lu_object *o)
458 struct lov_object *lov = lu2lov(o);
459 struct lov_stripe_md *lsm = lov->lo_lsm;
462 "released: %s, lsm{%p 0x%08X %d %u %u}:\n",
463 lov->lo_layout_invalid ? "invalid" : "valid", lsm,
464 lsm->lsm_magic, cfs_atomic_read(&lsm->lsm_refc),
465 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
470 * Implements cl_object_operations::coo_attr_get() method for an object
471 * without stripes (LLT_EMPTY layout type).
473 * The only attributes this layer is authoritative in this case is
474 * cl_attr::cat_blocks---it's 0.
476 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
477 struct cl_attr *attr)
479 attr->cat_blocks = 0;
483 static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
484 struct cl_attr *attr)
486 struct lov_object *lov = cl2lov(obj);
487 struct lov_layout_raid0 *r0 = lov_r0(lov);
488 struct cl_attr *lov_attr = &r0->lo_attr;
493 /* this is called w/o holding type guard mutex, so it must be inside
494 * an on going IO otherwise lsm may be replaced.
495 * LU-2117: it turns out there exists one exception. For mmaped files,
496 * the lock of those files may be requested in the other file's IO
497 * context, and this function is called in ccc_lock_state(), it will
498 * hit this assertion.
499 * Anyway, it's still okay to call attr_get w/o type guard as layout
500 * can't go if locks exist. */
501 /* LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 1); */
503 if (!r0->lo_attr_valid) {
504 struct lov_stripe_md *lsm = lov->lo_lsm;
505 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
508 memset(lvb, 0, sizeof(*lvb));
509 /* XXX: timestamps can be negative by sanity:test_39m,
511 lvb->lvb_atime = LLONG_MIN;
512 lvb->lvb_ctime = LLONG_MIN;
513 lvb->lvb_mtime = LLONG_MIN;
516 * XXX that should be replaced with a loop over sub-objects,
517 * doing cl_object_attr_get() on them. But for now, let's
518 * reuse old lov code.
522 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
523 * happy. It's not needed, because new code uses
524 * ->coh_attr_guard spin-lock to protect consistency of
525 * sub-object attributes.
527 lov_stripe_lock(lsm);
528 result = lov_merge_lvb_kms(lsm, lvb, &kms);
529 lov_stripe_unlock(lsm);
531 cl_lvb2attr(lov_attr, lvb);
532 lov_attr->cat_kms = kms;
533 r0->lo_attr_valid = 1;
536 if (result == 0) { /* merge results */
537 attr->cat_blocks = lov_attr->cat_blocks;
538 attr->cat_size = lov_attr->cat_size;
539 attr->cat_kms = lov_attr->cat_kms;
540 if (attr->cat_atime < lov_attr->cat_atime)
541 attr->cat_atime = lov_attr->cat_atime;
542 if (attr->cat_ctime < lov_attr->cat_ctime)
543 attr->cat_ctime = lov_attr->cat_ctime;
544 if (attr->cat_mtime < lov_attr->cat_mtime)
545 attr->cat_mtime = lov_attr->cat_mtime;
550 const static struct lov_layout_operations lov_dispatch[] = {
552 .llo_init = lov_init_empty,
553 .llo_delete = lov_delete_empty,
554 .llo_fini = lov_fini_empty,
555 .llo_install = lov_install_empty,
556 .llo_print = lov_print_empty,
557 .llo_page_init = lov_page_init_empty,
558 .llo_lock_init = lov_lock_init_empty,
559 .llo_io_init = lov_io_init_empty,
560 .llo_getattr = lov_attr_get_empty
563 .llo_init = lov_init_raid0,
564 .llo_delete = lov_delete_raid0,
565 .llo_fini = lov_fini_raid0,
566 .llo_install = lov_install_raid0,
567 .llo_print = lov_print_raid0,
568 .llo_page_init = lov_page_init_raid0,
569 .llo_lock_init = lov_lock_init_raid0,
570 .llo_io_init = lov_io_init_raid0,
571 .llo_getattr = lov_attr_get_raid0
574 .llo_init = lov_init_released,
575 .llo_delete = lov_delete_empty,
576 .llo_fini = lov_fini_released,
577 .llo_install = lov_install_empty,
578 .llo_print = lov_print_released,
579 .llo_page_init = lov_page_init_empty,
580 .llo_lock_init = lov_lock_init_empty,
581 .llo_io_init = lov_io_init_released,
582 .llo_getattr = lov_attr_get_empty
587 * Performs a double-dispatch based on the layout type of an object.
589 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
591 struct lov_object *__obj = (obj); \
592 enum lov_layout_type __llt; \
594 __llt = __obj->lo_type; \
595 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
596 lov_dispatch[__llt].op(__VA_ARGS__); \
600 * Return lov_layout_type associated with a given lsm
602 enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
606 if (lsm_is_released(lsm))
611 static inline void lov_conf_freeze(struct lov_object *lov)
613 if (lov->lo_owner != current)
614 down_read(&lov->lo_type_guard);
617 static inline void lov_conf_thaw(struct lov_object *lov)
619 if (lov->lo_owner != current)
620 up_read(&lov->lo_type_guard);
623 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
625 struct lov_object *__obj = (obj); \
626 int __lock = !!(lock); \
627 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
630 lov_conf_freeze(__obj); \
631 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
633 lov_conf_thaw(__obj); \
638 * Performs a locked double-dispatch based on the layout type of an object.
640 #define LOV_2DISPATCH(obj, op, ...) \
641 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
643 #define LOV_2DISPATCH_VOID(obj, op, ...) \
645 struct lov_object *__obj = (obj); \
646 enum lov_layout_type __llt; \
648 lov_conf_freeze(__obj); \
649 __llt = __obj->lo_type; \
650 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
651 lov_dispatch[__llt].op(__VA_ARGS__); \
652 lov_conf_thaw(__obj); \
655 static void lov_conf_lock(struct lov_object *lov)
657 LASSERT(lov->lo_owner != current);
658 down_write(&lov->lo_type_guard);
659 LASSERT(lov->lo_owner == NULL);
660 lov->lo_owner = current;
663 static void lov_conf_unlock(struct lov_object *lov)
665 lov->lo_owner = NULL;
666 up_write(&lov->lo_type_guard);
669 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
671 struct l_wait_info lwi = { 0 };
674 while (cfs_atomic_read(&lov->lo_active_ios) > 0) {
675 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
676 PFID(lu_object_fid(lov2lu(lov))),
677 cfs_atomic_read(&lov->lo_active_ios));
679 l_wait_event(lov->lo_waitq,
680 cfs_atomic_read(&lov->lo_active_ios) == 0, &lwi);
685 static int lov_layout_change(const struct lu_env *unused,
686 struct lov_object *lov,
687 const struct cl_object_conf *conf)
690 enum lov_layout_type llt = LLT_EMPTY;
691 union lov_layout_state *state = &lov->u;
692 const struct lov_layout_operations *old_ops;
693 const struct lov_layout_operations *new_ops;
700 LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
702 if (conf->u.coc_md != NULL)
703 llt = lov_type(conf->u.coc_md->lsm);
704 LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
706 cookie = cl_env_reenter();
707 env = cl_env_get(&refcheck);
709 cl_env_reexit(cookie);
710 RETURN(PTR_ERR(env));
713 CDEBUG(D_INODE, DFID" from %s to %s\n",
714 PFID(lu_object_fid(lov2lu(lov))),
715 llt2str(lov->lo_type), llt2str(llt));
717 old_ops = &lov_dispatch[lov->lo_type];
718 new_ops = &lov_dispatch[llt];
720 cl_object_prune(env, &lov->lo_cl);
722 result = old_ops->llo_delete(env, lov, &lov->u);
724 old_ops->llo_fini(env, lov, &lov->u);
726 LASSERT(cfs_atomic_read(&lov->lo_active_ios) == 0);
728 lov->lo_type = LLT_EMPTY;
729 result = new_ops->llo_init(env,
730 lu2lov_dev(lov->lo_cl.co_lu.lo_dev),
733 new_ops->llo_install(env, lov, state);
736 new_ops->llo_delete(env, lov, state);
737 new_ops->llo_fini(env, lov, state);
738 /* this file becomes an EMPTY file. */
742 cl_env_put(env, &refcheck);
743 cl_env_reexit(cookie);
747 /*****************************************************************************
749 * Lov object operations.
752 int lov_object_init(const struct lu_env *env, struct lu_object *obj,
753 const struct lu_object_conf *conf)
755 struct lov_device *dev = lu2lov_dev(obj->lo_dev);
756 struct lov_object *lov = lu2lov(obj);
757 const struct cl_object_conf *cconf = lu2cl_conf(conf);
758 union lov_layout_state *set = &lov->u;
759 const struct lov_layout_operations *ops;
763 init_rwsem(&lov->lo_type_guard);
764 cfs_atomic_set(&lov->lo_active_ios, 0);
765 init_waitqueue_head(&lov->lo_waitq);
767 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
769 /* no locking is necessary, as object is being created */
770 lov->lo_type = lov_type(cconf->u.coc_md->lsm);
771 ops = &lov_dispatch[lov->lo_type];
772 result = ops->llo_init(env, dev, lov, cconf, set);
774 ops->llo_install(env, lov, set);
778 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
779 const struct cl_object_conf *conf)
781 struct lov_stripe_md *lsm = NULL;
782 struct lov_object *lov = cl2lov(obj);
787 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
788 lov->lo_layout_invalid = true;
789 GOTO(out, result = 0);
792 if (conf->coc_opc == OBJECT_CONF_WAIT) {
793 if (lov->lo_layout_invalid &&
794 cfs_atomic_read(&lov->lo_active_ios) > 0) {
795 lov_conf_unlock(lov);
796 result = lov_layout_wait(env, lov);
802 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
804 if (conf->u.coc_md != NULL)
805 lsm = conf->u.coc_md->lsm;
806 if ((lsm == NULL && lov->lo_lsm == NULL) ||
807 ((lsm != NULL && lov->lo_lsm != NULL) &&
808 (lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
809 (lov->lo_lsm->lsm_pattern == lsm->lsm_pattern))) {
810 /* same version of layout */
811 lov->lo_layout_invalid = false;
812 GOTO(out, result = 0);
815 /* will change layout - check if there still exists active IO. */
816 if (cfs_atomic_read(&lov->lo_active_ios) > 0) {
817 lov->lo_layout_invalid = true;
818 GOTO(out, result = -EBUSY);
821 lov->lo_layout_invalid = lov_layout_change(env, lov, conf);
825 lov_conf_unlock(lov);
826 CDEBUG(D_INODE, DFID" lo_layout_invalid=%d\n",
827 PFID(lu_object_fid(lov2lu(lov))), lov->lo_layout_invalid);
831 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
833 struct lov_object *lov = lu2lov(obj);
836 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
840 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
842 struct lov_object *lov = lu2lov(obj);
845 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
847 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
851 static int lov_object_print(const struct lu_env *env, void *cookie,
852 lu_printer_t p, const struct lu_object *o)
854 return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
857 int lov_page_init(const struct lu_env *env, struct cl_object *obj,
858 struct cl_page *page, pgoff_t index)
860 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_page_init, env, obj, page,
865 * Implements cl_object_operations::clo_io_init() method for lov
866 * layer. Dispatches to the appropriate layout io initialization method.
868 int lov_io_init(const struct lu_env *env, struct cl_object *obj,
871 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
872 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
873 !io->ci_ignore_layout, env, obj, io);
877 * An implementation of cl_object_operations::clo_attr_get() method for lov
878 * layer. For raid0 layout this collects and merges attributes of all
881 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
882 struct cl_attr *attr)
884 /* do not take lock, as this function is called under a
885 * spin-lock. Layout is protected from changing by ongoing IO. */
886 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
889 static int lov_attr_set(const struct lu_env *env, struct cl_object *obj,
890 const struct cl_attr *attr, unsigned valid)
893 * No dispatch is required here, as no layout implements this.
898 int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
899 struct cl_lock *lock, const struct cl_io *io)
901 /* No need to lock because we've taken one refcount of layout. */
902 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
906 static const struct cl_object_operations lov_ops = {
907 .coo_page_init = lov_page_init,
908 .coo_lock_init = lov_lock_init,
909 .coo_io_init = lov_io_init,
910 .coo_attr_get = lov_attr_get,
911 .coo_attr_set = lov_attr_set,
912 .coo_conf_set = lov_conf_set
915 static const struct lu_object_operations lov_lu_obj_ops = {
916 .loo_object_init = lov_object_init,
917 .loo_object_delete = lov_object_delete,
918 .loo_object_release = NULL,
919 .loo_object_free = lov_object_free,
920 .loo_object_print = lov_object_print,
921 .loo_object_invariant = NULL
924 struct lu_object *lov_object_alloc(const struct lu_env *env,
925 const struct lu_object_header *unused,
926 struct lu_device *dev)
928 struct lov_object *lov;
929 struct lu_object *obj;
932 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, __GFP_IO);
935 lu_object_init(obj, NULL, dev);
936 lov->lo_cl.co_ops = &lov_ops;
937 lov->lo_type = -1; /* invalid, to catch uninitialized type */
939 * object io operation vector (cl_object::co_iop) is installed
940 * later in lov_object_init(), as different vectors are used
941 * for object with different layouts.
943 obj->lo_ops = &lov_lu_obj_ops;
949 struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
951 struct lov_stripe_md *lsm = NULL;
953 lov_conf_freeze(lov);
954 if (lov->lo_lsm != NULL) {
955 lsm = lsm_addref(lov->lo_lsm);
956 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
957 lsm, cfs_atomic_read(&lsm->lsm_refc),
958 lov->lo_layout_invalid, current);
964 struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
966 struct lu_object *luobj;
967 struct lov_stripe_md *lsm = NULL;
972 luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
975 lsm = lov_lsm_addref(lu2lov(luobj));
978 EXPORT_SYMBOL(lov_lsm_get);
980 void lov_lsm_put(struct cl_object *unused, struct lov_stripe_md *lsm)
983 lov_free_memmd(&lsm);
985 EXPORT_SYMBOL(lov_lsm_put);
987 int lov_read_and_clear_async_rc(struct cl_object *clob)
989 struct lu_object *luobj;
993 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
996 struct lov_object *lov = lu2lov(luobj);
998 lov_conf_freeze(lov);
999 switch (lov->lo_type) {
1001 struct lov_stripe_md *lsm;
1005 LASSERT(lsm != NULL);
1006 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1007 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1008 if (loi->loi_ar.ar_rc && !rc)
1009 rc = loi->loi_ar.ar_rc;
1010 loi->loi_ar.ar_rc = 0;
1023 EXPORT_SYMBOL(lov_read_and_clear_async_rc);