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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, 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 <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)
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,
126 struct lov_layout_raid0 *r0, int idx)
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);
147 parent = subhdr->coh_parent;
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 if (parent == NULL) {
157 subhdr->coh_parent = hdr;
158 subhdr->coh_nesting = hdr->coh_nesting + 1;
159 lu_object_ref_add(&stripe->co_lu, "lov-parent", lov);
160 r0->lo_sub[idx] = cl2lovsub(stripe);
161 r0->lo_sub[idx]->lso_super = lov;
162 r0->lo_sub[idx]->lso_index = idx;
165 struct lu_object *old_obj;
166 struct lov_object *old_lov;
167 unsigned int mask = D_INODE;
169 old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
170 LASSERT(old_obj != NULL);
171 old_lov = cl2lov(lu2cl(old_obj));
172 if (old_lov->lo_layout_invalid) {
173 /* the object's layout has already changed but isn't
175 lu_object_unhash(env, &stripe->co_lu);
182 LU_OBJECT_DEBUG(mask, env, &stripe->co_lu,
183 "stripe %d is already owned.\n", idx);
184 LU_OBJECT_DEBUG(mask, env, old_obj, "owned.\n");
185 LU_OBJECT_HEADER(mask, env, lov2lu(lov), "try to own.\n");
186 cl_object_put(env, stripe);
191 static int lov_init_raid0(const struct lu_env *env,
192 struct lov_device *dev, struct lov_object *lov,
193 const struct cl_object_conf *conf,
194 union lov_layout_state *state)
199 struct cl_object *stripe;
200 struct lov_thread_info *lti = lov_env_info(env);
201 struct cl_object_conf *subconf = <i->lti_stripe_conf;
202 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
203 struct lu_fid *ofid = <i->lti_fid;
204 struct lov_layout_raid0 *r0 = &state->raid0;
206 if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3) {
207 dump_lsm(D_ERROR, lsm);
208 LASSERTF(0, "magic mismatch, expected %d/%d, actual %d.\n",
209 LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
212 LASSERT(lov->lo_lsm == NULL);
213 lov->lo_lsm = lsm_addref(lsm);
214 r0->lo_nr = lsm->lsm_stripe_count;
215 LASSERT(r0->lo_nr <= lov_targets_nr(dev));
217 OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof(r0->lo_sub[0]));
218 if (r0->lo_sub != NULL) {
220 subconf->coc_inode = conf->coc_inode;
221 spin_lock_init(&r0->lo_sub_lock);
223 * Create stripe cl_objects.
225 for (i = 0; i < r0->lo_nr && result == 0; ++i) {
226 struct cl_device *subdev;
227 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
228 int ost_idx = oinfo->loi_ost_idx;
230 result = ostid_to_fid(ofid, &oinfo->loi_oi,
235 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
236 subconf->u.coc_oinfo = oinfo;
237 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
238 /* In the function below, .hs_keycmp resolves to
239 * lu_obj_hop_keycmp() */
240 /* coverity[overrun-buffer-val] */
241 stripe = lov_sub_find(env, subdev, ofid, subconf);
242 if (!IS_ERR(stripe)) {
243 result = lov_init_sub(env, lov, stripe, r0, i);
244 if (result == -EAGAIN) { /* try again */
249 result = PTR_ERR(stripe);
258 static int lov_init_released(const struct lu_env *env,
259 struct lov_device *dev, struct lov_object *lov,
260 const struct cl_object_conf *conf,
261 union lov_layout_state *state)
263 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
265 LASSERT(lsm != NULL);
266 LASSERT(lsm_is_released(lsm));
267 LASSERT(lov->lo_lsm == NULL);
269 lov->lo_lsm = lsm_addref(lsm);
273 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
274 union lov_layout_state *state)
276 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
278 lov_layout_wait(env, lov);
280 cl_object_prune(env, &lov->lo_cl);
284 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
285 struct lovsub_object *los, int idx)
287 struct cl_object *sub;
288 struct lov_layout_raid0 *r0;
289 struct lu_site *site;
290 struct lu_site_bkt_data *bkt;
291 wait_queue_t *waiter;
294 LASSERT(r0->lo_sub[idx] == los);
296 sub = lovsub2cl(los);
297 site = sub->co_lu.lo_dev->ld_site;
298 bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
300 cl_object_kill(env, sub);
301 /* release a reference to the sub-object and ... */
302 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
303 cl_object_put(env, sub);
305 /* ... wait until it is actually destroyed---sub-object clears its
306 * ->lo_sub[] slot in lovsub_object_fini() */
307 if (r0->lo_sub[idx] == los) {
308 waiter = &lov_env_info(env)->lti_waiter;
309 init_waitqueue_entry_current(waiter);
310 add_wait_queue(&bkt->lsb_marche_funebre, waiter);
311 set_current_state(TASK_UNINTERRUPTIBLE);
313 /* this wait-queue is signaled at the end of
314 * lu_object_free(). */
315 set_current_state(TASK_UNINTERRUPTIBLE);
316 spin_lock(&r0->lo_sub_lock);
317 if (r0->lo_sub[idx] == los) {
318 spin_unlock(&r0->lo_sub_lock);
319 waitq_wait(waiter, TASK_UNINTERRUPTIBLE);
321 spin_unlock(&r0->lo_sub_lock);
322 set_current_state(TASK_RUNNING);
326 remove_wait_queue(&bkt->lsb_marche_funebre, waiter);
328 LASSERT(r0->lo_sub[idx] == NULL);
331 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
332 union lov_layout_state *state)
334 struct lov_layout_raid0 *r0 = &state->raid0;
335 struct lov_stripe_md *lsm = lov->lo_lsm;
338 dump_lsm(D_INODE, lsm);
340 lov_layout_wait(env, lov);
341 if (r0->lo_sub != NULL) {
342 for (i = 0; i < r0->lo_nr; ++i) {
343 struct lovsub_object *los = r0->lo_sub[i];
346 cl_locks_prune(env, &los->lso_cl, 1);
348 * If top-level object is to be evicted from
349 * the cache, so are its sub-objects.
351 lov_subobject_kill(env, lov, los, i);
355 cl_object_prune(env, &lov->lo_cl);
359 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
360 union lov_layout_state *state)
362 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
365 static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
366 union lov_layout_state *state)
368 struct lov_layout_raid0 *r0 = &state->raid0;
370 if (r0->lo_sub != NULL) {
371 OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof(r0->lo_sub[0]));
375 dump_lsm(D_INODE, lov->lo_lsm);
376 lov_free_memmd(&lov->lo_lsm);
379 static void lov_fini_released(const struct lu_env *env, struct lov_object *lov,
380 union lov_layout_state *state)
382 dump_lsm(D_INODE, lov->lo_lsm);
383 lov_free_memmd(&lov->lo_lsm);
386 static int lov_print_empty(const struct lu_env *env, void *cookie,
387 lu_printer_t p, const struct lu_object *o)
389 (*p)(env, cookie, "empty %d\n", lu2lov(o)->lo_layout_invalid);
393 static int lov_print_raid0(const struct lu_env *env, void *cookie,
394 lu_printer_t p, const struct lu_object *o)
396 struct lov_object *lov = lu2lov(o);
397 struct lov_layout_raid0 *r0 = lov_r0(lov);
398 struct lov_stripe_md *lsm = lov->lo_lsm;
401 (*p)(env, cookie, "stripes: %d, %svalid, lsm{%p 0x%08X %d %u %u}: \n",
402 r0->lo_nr, lov->lo_layout_invalid ? "in" : "", lsm,
403 lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
404 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
405 for (i = 0; i < r0->lo_nr; ++i) {
406 struct lu_object *sub;
408 if (r0->lo_sub[i] != NULL) {
409 sub = lovsub2lu(r0->lo_sub[i]);
410 lu_object_print(env, cookie, p, sub);
412 (*p)(env, cookie, "sub %d absent\n", i);
417 static int lov_print_released(const struct lu_env *env, void *cookie,
418 lu_printer_t p, const struct lu_object *o)
420 (*p)(env, cookie, "released\n");
425 * Implements cl_object_operations::coo_attr_get() method for an object
426 * without stripes (LLT_EMPTY layout type).
428 * The only attributes this layer is authoritative in this case is
429 * cl_attr::cat_blocks---it's 0.
431 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
432 struct cl_attr *attr)
434 attr->cat_blocks = 0;
438 static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
439 struct cl_attr *attr)
441 struct lov_object *lov = cl2lov(obj);
442 struct lov_layout_raid0 *r0 = lov_r0(lov);
443 struct cl_attr *lov_attr = &r0->lo_attr;
446 /* this is called w/o holding type guard mutex, so it must be inside
447 * an on going IO otherwise lsm may be replaced.
448 * LU-2117: it turns out there exists one exception. For mmaped files,
449 * the lock of those files may be requested in the other file's IO
450 * context, and this function is called in ccc_lock_state(), it will
451 * hit this assertion.
452 * Anyway, it's still okay to call attr_get w/o type guard as layout
453 * can't go if locks exist. */
454 /* LASSERT(atomic_read(&lsm->lsm_refc) > 1); */
456 if (!r0->lo_attr_valid) {
457 struct lov_stripe_md *lsm = lov->lo_lsm;
458 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
461 memset(lvb, 0, sizeof(*lvb));
462 /* XXX: timestamps can be negative by sanity:test_39m,
464 lvb->lvb_atime = LLONG_MIN;
465 lvb->lvb_ctime = LLONG_MIN;
466 lvb->lvb_mtime = LLONG_MIN;
469 * XXX that should be replaced with a loop over sub-objects,
470 * doing cl_object_attr_get() on them. But for now, let's
471 * reuse old lov code.
475 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
476 * happy. It's not needed, because new code uses
477 * ->coh_attr_guard spin-lock to protect consistency of
478 * sub-object attributes.
480 lov_stripe_lock(lsm);
481 result = lov_merge_lvb_kms(lsm, lvb, &kms);
482 lov_stripe_unlock(lsm);
484 cl_lvb2attr(lov_attr, lvb);
485 lov_attr->cat_kms = kms;
486 r0->lo_attr_valid = 1;
489 if (result == 0) { /* merge results */
490 attr->cat_blocks = lov_attr->cat_blocks;
491 attr->cat_size = lov_attr->cat_size;
492 attr->cat_kms = lov_attr->cat_kms;
493 if (attr->cat_atime < lov_attr->cat_atime)
494 attr->cat_atime = lov_attr->cat_atime;
495 if (attr->cat_ctime < lov_attr->cat_ctime)
496 attr->cat_ctime = lov_attr->cat_ctime;
497 if (attr->cat_mtime < lov_attr->cat_mtime)
498 attr->cat_mtime = lov_attr->cat_mtime;
503 const static struct lov_layout_operations lov_dispatch[] = {
505 .llo_init = lov_init_empty,
506 .llo_delete = lov_delete_empty,
507 .llo_fini = lov_fini_empty,
508 .llo_install = lov_install_empty,
509 .llo_print = lov_print_empty,
510 .llo_page_init = lov_page_init_empty,
511 .llo_lock_init = lov_lock_init_empty,
512 .llo_io_init = lov_io_init_empty,
513 .llo_getattr = lov_attr_get_empty
516 .llo_init = lov_init_raid0,
517 .llo_delete = lov_delete_raid0,
518 .llo_fini = lov_fini_raid0,
519 .llo_install = lov_install_raid0,
520 .llo_print = lov_print_raid0,
521 .llo_page_init = lov_page_init_raid0,
522 .llo_lock_init = lov_lock_init_raid0,
523 .llo_io_init = lov_io_init_raid0,
524 .llo_getattr = lov_attr_get_raid0
527 .llo_init = lov_init_released,
528 .llo_delete = lov_delete_empty,
529 .llo_fini = lov_fini_released,
530 .llo_install = lov_install_empty,
531 .llo_print = lov_print_released,
532 .llo_page_init = lov_page_init_empty,
533 .llo_lock_init = lov_lock_init_empty,
534 .llo_io_init = lov_io_init_released,
535 .llo_getattr = lov_attr_get_empty
540 * Performs a double-dispatch based on the layout type of an object.
542 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
544 struct lov_object *__obj = (obj); \
545 enum lov_layout_type __llt; \
547 __llt = __obj->lo_type; \
548 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
549 lov_dispatch[__llt].op(__VA_ARGS__); \
553 * Return lov_layout_type associated with a given lsm
555 enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
559 if (lsm_is_released(lsm))
564 static inline void lov_conf_freeze(struct lov_object *lov)
566 if (lov->lo_owner != current)
567 down_read(&lov->lo_type_guard);
570 static inline void lov_conf_thaw(struct lov_object *lov)
572 if (lov->lo_owner != current)
573 up_read(&lov->lo_type_guard);
576 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
578 struct lov_object *__obj = (obj); \
579 int __lock = !!(lock); \
580 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
583 lov_conf_freeze(__obj); \
584 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
586 lov_conf_thaw(__obj); \
591 * Performs a locked double-dispatch based on the layout type of an object.
593 #define LOV_2DISPATCH(obj, op, ...) \
594 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
596 #define LOV_2DISPATCH_VOID(obj, op, ...) \
598 struct lov_object *__obj = (obj); \
599 enum lov_layout_type __llt; \
601 lov_conf_freeze(__obj); \
602 __llt = __obj->lo_type; \
603 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
604 lov_dispatch[__llt].op(__VA_ARGS__); \
605 lov_conf_thaw(__obj); \
608 static void lov_conf_lock(struct lov_object *lov)
610 LASSERT(lov->lo_owner != current);
611 down_write(&lov->lo_type_guard);
612 LASSERT(lov->lo_owner == NULL);
613 lov->lo_owner = current;
616 static void lov_conf_unlock(struct lov_object *lov)
618 lov->lo_owner = NULL;
619 up_write(&lov->lo_type_guard);
622 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
624 struct l_wait_info lwi = { 0 };
626 while (atomic_read(&lov->lo_active_ios) > 0) {
627 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
628 PFID(lu_object_fid(lov2lu(lov))),
629 atomic_read(&lov->lo_active_ios));
631 l_wait_event(lov->lo_waitq,
632 atomic_read(&lov->lo_active_ios) == 0, &lwi);
637 static int lov_layout_change(const struct lu_env *unused,
638 struct lov_object *lov,
639 const struct cl_object_conf *conf)
642 enum lov_layout_type llt = LLT_EMPTY;
643 union lov_layout_state *state = &lov->u;
644 const struct lov_layout_operations *old_ops;
645 const struct lov_layout_operations *new_ops;
647 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
652 LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
654 if (conf->u.coc_md != NULL)
655 llt = lov_type(conf->u.coc_md->lsm);
656 LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
658 cookie = cl_env_reenter();
659 env = cl_env_get(&refcheck);
661 cl_env_reexit(cookie);
665 old_ops = &lov_dispatch[lov->lo_type];
666 new_ops = &lov_dispatch[llt];
668 result = old_ops->llo_delete(env, lov, &lov->u);
670 old_ops->llo_fini(env, lov, &lov->u);
672 LASSERT(atomic_read(&lov->lo_active_ios) == 0);
673 LASSERT(hdr->coh_tree.rnode == NULL);
674 LASSERT(hdr->coh_pages == 0);
676 lov->lo_type = LLT_EMPTY;
677 result = new_ops->llo_init(env,
678 lu2lov_dev(lov->lo_cl.co_lu.lo_dev),
681 new_ops->llo_install(env, lov, state);
684 new_ops->llo_delete(env, lov, state);
685 new_ops->llo_fini(env, lov, state);
686 /* this file becomes an EMPTY file. */
690 cl_env_put(env, &refcheck);
691 cl_env_reexit(cookie);
695 /*****************************************************************************
697 * Lov object operations.
700 int lov_object_init(const struct lu_env *env, struct lu_object *obj,
701 const struct lu_object_conf *conf)
703 struct lov_device *dev = lu2lov_dev(obj->lo_dev);
704 struct lov_object *lov = lu2lov(obj);
705 const struct cl_object_conf *cconf = lu2cl_conf(conf);
706 union lov_layout_state *set = &lov->u;
707 const struct lov_layout_operations *ops;
710 init_rwsem(&lov->lo_type_guard);
711 atomic_set(&lov->lo_active_ios, 0);
712 init_waitqueue_head(&lov->lo_waitq);
714 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
716 /* no locking is necessary, as object is being created */
717 lov->lo_type = lov_type(cconf->u.coc_md->lsm);
718 ops = &lov_dispatch[lov->lo_type];
719 result = ops->llo_init(env, dev, lov, cconf, set);
721 ops->llo_install(env, lov, set);
725 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
726 const struct cl_object_conf *conf)
728 struct lov_stripe_md *lsm = NULL;
729 struct lov_object *lov = cl2lov(obj);
733 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
734 lov->lo_layout_invalid = true;
735 GOTO(out, result = 0);
738 if (conf->coc_opc == OBJECT_CONF_WAIT) {
739 if (lov->lo_layout_invalid &&
740 atomic_read(&lov->lo_active_ios) > 0) {
741 lov_conf_unlock(lov);
742 result = lov_layout_wait(env, lov);
748 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
750 if (conf->u.coc_md != NULL)
751 lsm = conf->u.coc_md->lsm;
752 if ((lsm == NULL && lov->lo_lsm == NULL) ||
753 (lsm != NULL && lov->lo_lsm != NULL &&
754 lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen)) {
755 /* same version of layout */
756 lov->lo_layout_invalid = false;
757 GOTO(out, result = 0);
760 /* will change layout - check if there still exists active IO. */
761 if (atomic_read(&lov->lo_active_ios) > 0) {
762 lov->lo_layout_invalid = true;
763 GOTO(out, result = -EBUSY);
766 lov->lo_layout_invalid = lov_layout_change(env, lov, conf);
769 lov_conf_unlock(lov);
773 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
775 struct lov_object *lov = lu2lov(obj);
777 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
780 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
782 struct lov_object *lov = lu2lov(obj);
784 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
786 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
789 static int lov_object_print(const struct lu_env *env, void *cookie,
790 lu_printer_t p, const struct lu_object *o)
792 return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
795 int lov_page_init(const struct lu_env *env, struct cl_object *obj,
796 struct cl_page *page, struct page *vmpage)
798 return LOV_2DISPATCH_NOLOCK(cl2lov(obj),
799 llo_page_init, env, obj, page, vmpage);
803 * Implements cl_object_operations::clo_io_init() method for lov
804 * layer. Dispatches to the appropriate layout io initialization method.
806 int lov_io_init(const struct lu_env *env, struct cl_object *obj,
809 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
810 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
811 !io->ci_ignore_layout, env, obj, io);
815 * An implementation of cl_object_operations::clo_attr_get() method for lov
816 * layer. For raid0 layout this collects and merges attributes of all
819 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
820 struct cl_attr *attr)
822 /* do not take lock, as this function is called under a
823 * spin-lock. Layout is protected from changing by ongoing IO. */
824 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
827 static int lov_attr_set(const struct lu_env *env, struct cl_object *obj,
828 const struct cl_attr *attr, unsigned valid)
831 * No dispatch is required here, as no layout implements this.
836 int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
837 struct cl_lock *lock, const struct cl_io *io)
839 /* No need to lock because we've taken one refcount of layout. */
840 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
844 static const struct cl_object_operations lov_ops = {
845 .coo_page_init = lov_page_init,
846 .coo_lock_init = lov_lock_init,
847 .coo_io_init = lov_io_init,
848 .coo_attr_get = lov_attr_get,
849 .coo_attr_set = lov_attr_set,
850 .coo_conf_set = lov_conf_set
853 static const struct lu_object_operations lov_lu_obj_ops = {
854 .loo_object_init = lov_object_init,
855 .loo_object_delete = lov_object_delete,
856 .loo_object_release = NULL,
857 .loo_object_free = lov_object_free,
858 .loo_object_print = lov_object_print,
859 .loo_object_invariant = NULL
862 struct lu_object *lov_object_alloc(const struct lu_env *env,
863 const struct lu_object_header *unused,
864 struct lu_device *dev)
866 struct lov_object *lov;
867 struct lu_object *obj;
869 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, __GFP_IO);
872 lu_object_init(obj, NULL, dev);
873 lov->lo_cl.co_ops = &lov_ops;
874 lov->lo_type = -1; /* invalid, to catch uninitialized type */
876 * object io operation vector (cl_object::co_iop) is installed
877 * later in lov_object_init(), as different vectors are used
878 * for object with different layouts.
880 obj->lo_ops = &lov_lu_obj_ops;
886 struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
888 struct lov_stripe_md *lsm = NULL;
890 lov_conf_freeze(lov);
891 if (lov->lo_lsm != NULL) {
892 lsm = lsm_addref(lov->lo_lsm);
893 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
894 lsm, atomic_read(&lsm->lsm_refc),
895 lov->lo_layout_invalid, current);
901 void lov_lsm_decref(struct lov_object *lov, struct lov_stripe_md *lsm)
906 CDEBUG(D_INODE, "lsm %p decref %d by %p.\n",
907 lsm, atomic_read(&lsm->lsm_refc), current);
909 lov_free_memmd(&lsm);
912 struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
914 struct lu_object *luobj;
915 struct lov_stripe_md *lsm = NULL;
920 luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
923 lsm = lov_lsm_addref(lu2lov(luobj));
926 EXPORT_SYMBOL(lov_lsm_get);
928 void lov_lsm_put(struct cl_object *unused, struct lov_stripe_md *lsm)
931 lov_free_memmd(&lsm);
933 EXPORT_SYMBOL(lov_lsm_put);
935 int lov_read_and_clear_async_rc(struct cl_object *clob)
937 struct lu_object *luobj;
940 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
943 struct lov_object *lov = lu2lov(luobj);
945 lov_conf_freeze(lov);
946 switch (lov->lo_type) {
948 struct lov_stripe_md *lsm;
952 LASSERT(lsm != NULL);
953 for (i = 0; i < lsm->lsm_stripe_count; i++) {
954 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
955 if (loi->loi_ar.ar_rc && !rc)
956 rc = loi->loi_ar.ar_rc;
957 loi->loi_ar.ar_rc = 0;
970 EXPORT_SYMBOL(lov_read_and_clear_async_rc);