4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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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, cfs_page_t *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,
127 struct lov_layout_raid0 *r0, int idx)
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);
148 parent = subhdr->coh_parent;
150 oinfo = lov->lo_lsm->lsm_oinfo[idx];
151 CDEBUG(D_INODE, DFID"@%p[%d] -> "DFID"@%p: id: "LPU64" seq: "LPU64
152 " idx: %d gen: %d\n",
153 PFID(&subhdr->coh_lu.loh_fid), subhdr, idx,
154 PFID(&hdr->coh_lu.loh_fid), hdr,
155 oinfo->loi_id, oinfo->loi_seq,
156 oinfo->loi_ost_idx, oinfo->loi_ost_gen);
158 if (parent == NULL) {
159 subhdr->coh_parent = hdr;
160 subhdr->coh_nesting = hdr->coh_nesting + 1;
161 lu_object_ref_add(&stripe->co_lu, "lov-parent", lov);
162 r0->lo_sub[idx] = cl2lovsub(stripe);
163 r0->lo_sub[idx]->lso_super = lov;
164 r0->lo_sub[idx]->lso_index = idx;
167 struct lu_object *old_obj;
168 struct lov_object *old_lov;
169 unsigned int mask = D_INODE;
171 old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
172 LASSERT(old_obj != NULL);
173 old_lov = cl2lov(lu2cl(old_obj));
174 if (old_lov->lo_layout_invalid) {
175 /* the object's layout has already changed but isn't
177 lu_object_unhash(env, &stripe->co_lu);
184 LU_OBJECT_DEBUG(mask, env, &stripe->co_lu,
185 "stripe %d is already owned.\n", idx);
186 LU_OBJECT_DEBUG(mask, env, old_obj, "owned.\n");
187 LU_OBJECT_HEADER(mask, env, lov2lu(lov), "try to own.\n");
188 cl_object_put(env, stripe);
193 static int lov_init_raid0(const struct lu_env *env,
194 struct lov_device *dev, struct lov_object *lov,
195 const struct cl_object_conf *conf,
196 union lov_layout_state *state)
201 struct cl_object *stripe;
202 struct lov_thread_info *lti = lov_env_info(env);
203 struct cl_object_conf *subconf = <i->lti_stripe_conf;
204 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
205 struct lu_fid *ofid = <i->lti_fid;
206 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 OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
222 if (r0->lo_sub != NULL) {
224 subconf->coc_inode = conf->coc_inode;
225 spin_lock_init(&r0->lo_sub_lock);
227 * Create stripe cl_objects.
229 for (i = 0; i < r0->lo_nr && result == 0; ++i) {
230 struct cl_device *subdev;
231 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
232 int ost_idx = oinfo->loi_ost_idx;
234 fid_ostid_unpack(ofid, &oinfo->loi_oi,
236 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
237 subconf->u.coc_oinfo = oinfo;
238 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
239 /* In the function below, .hs_keycmp resolves to
240 * lu_obj_hop_keycmp() */
241 /* coverity[overrun-buffer-val] */
242 stripe = lov_sub_find(env, subdev, ofid, subconf);
243 if (!IS_ERR(stripe)) {
244 result = lov_init_sub(env, lov, stripe, r0, i);
245 if (result == -EAGAIN) { /* try again */
250 result = PTR_ERR(stripe);
258 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
259 union lov_layout_state *state)
261 LASSERT(lov->lo_type == LLT_EMPTY);
263 lov_layout_wait(env, lov);
265 cl_object_prune(env, &lov->lo_cl);
269 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
270 struct lovsub_object *los, int idx)
272 struct cl_object *sub;
273 struct lov_layout_raid0 *r0;
274 struct lu_site *site;
275 struct lu_site_bkt_data *bkt;
276 cfs_waitlink_t *waiter;
279 LASSERT(r0->lo_sub[idx] == los);
281 sub = lovsub2cl(los);
282 site = sub->co_lu.lo_dev->ld_site;
283 bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
285 cl_object_kill(env, sub);
286 /* release a reference to the sub-object and ... */
287 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
288 cl_object_put(env, sub);
290 /* ... wait until it is actually destroyed---sub-object clears its
291 * ->lo_sub[] slot in lovsub_object_fini() */
292 if (r0->lo_sub[idx] == los) {
293 waiter = &lov_env_info(env)->lti_waiter;
294 cfs_waitlink_init(waiter);
295 cfs_waitq_add(&bkt->lsb_marche_funebre, waiter);
296 cfs_set_current_state(CFS_TASK_UNINT);
298 /* this wait-queue is signaled at the end of
299 * lu_object_free(). */
300 cfs_set_current_state(CFS_TASK_UNINT);
301 spin_lock(&r0->lo_sub_lock);
302 if (r0->lo_sub[idx] == los) {
303 spin_unlock(&r0->lo_sub_lock);
304 cfs_waitq_wait(waiter, CFS_TASK_UNINT);
306 spin_unlock(&r0->lo_sub_lock);
307 cfs_set_current_state(CFS_TASK_RUNNING);
311 cfs_waitq_del(&bkt->lsb_marche_funebre, waiter);
313 LASSERT(r0->lo_sub[idx] == NULL);
316 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
317 union lov_layout_state *state)
319 struct lov_layout_raid0 *r0 = &state->raid0;
320 struct lov_stripe_md *lsm = lov->lo_lsm;
325 dump_lsm(D_INODE, lsm);
327 lov_layout_wait(env, lov);
328 if (r0->lo_sub != NULL) {
329 for (i = 0; i < r0->lo_nr; ++i) {
330 struct lovsub_object *los = r0->lo_sub[i];
333 cl_locks_prune(env, &los->lso_cl, 1);
335 * If top-level object is to be evicted from
336 * the cache, so are its sub-objects.
338 lov_subobject_kill(env, lov, los, i);
342 cl_object_prune(env, &lov->lo_cl);
346 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
347 union lov_layout_state *state)
349 LASSERT(lov->lo_type == LLT_EMPTY);
352 static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
353 union lov_layout_state *state)
355 struct lov_layout_raid0 *r0 = &state->raid0;
358 if (r0->lo_sub != NULL) {
359 OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
363 dump_lsm(D_INODE, lov->lo_lsm);
364 lov_free_memmd(&lov->lo_lsm);
369 static int lov_print_empty(const struct lu_env *env, void *cookie,
370 lu_printer_t p, const struct lu_object *o)
372 (*p)(env, cookie, "empty %d\n", lu2lov(o)->lo_layout_invalid);
376 static int lov_print_raid0(const struct lu_env *env, void *cookie,
377 lu_printer_t p, const struct lu_object *o)
379 struct lov_object *lov = lu2lov(o);
380 struct lov_layout_raid0 *r0 = lov_r0(lov);
381 struct lov_stripe_md *lsm = lov->lo_lsm;
384 (*p)(env, cookie, "stripes: %d, %svalid, lsm{%p 0x%08X %d %u %u}: \n",
385 r0->lo_nr, lov->lo_layout_invalid ? "in" : "", lsm,
386 lsm->lsm_magic, cfs_atomic_read(&lsm->lsm_refc),
387 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
388 for (i = 0; i < r0->lo_nr; ++i) {
389 struct lu_object *sub;
391 if (r0->lo_sub[i] != NULL) {
392 sub = lovsub2lu(r0->lo_sub[i]);
393 lu_object_print(env, cookie, p, sub);
395 (*p)(env, cookie, "sub %d absent\n", i);
401 * Implements cl_object_operations::coo_attr_get() method for an object
402 * without stripes (LLT_EMPTY layout type).
404 * The only attributes this layer is authoritative in this case is
405 * cl_attr::cat_blocks---it's 0.
407 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
408 struct cl_attr *attr)
410 attr->cat_blocks = 0;
414 static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
415 struct cl_attr *attr)
417 struct lov_object *lov = cl2lov(obj);
418 struct lov_layout_raid0 *r0 = lov_r0(lov);
419 struct cl_attr *lov_attr = &r0->lo_attr;
424 /* this is called w/o holding type guard mutex, so it must be inside
425 * an on going IO otherwise lsm may be replaced.
426 * LU-2117: it turns out there exists one exception. For mmaped files,
427 * the lock of those files may be requested in the other file's IO
428 * context, and this function is called in ccc_lock_state(), it will
429 * hit this assertion.
430 * Anyway, it's still okay to call attr_get w/o type guard as layout
431 * can't go if locks exist. */
432 /* LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 1); */
434 if (!r0->lo_attr_valid) {
435 struct lov_stripe_md *lsm = lov->lo_lsm;
436 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
439 memset(lvb, 0, sizeof(*lvb));
440 /* XXX: timestamps can be negative by sanity:test_39m,
442 lvb->lvb_atime = LLONG_MIN;
443 lvb->lvb_ctime = LLONG_MIN;
444 lvb->lvb_mtime = LLONG_MIN;
447 * XXX that should be replaced with a loop over sub-objects,
448 * doing cl_object_attr_get() on them. But for now, let's
449 * reuse old lov code.
453 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
454 * happy. It's not needed, because new code uses
455 * ->coh_attr_guard spin-lock to protect consistency of
456 * sub-object attributes.
458 lov_stripe_lock(lsm);
459 result = lov_merge_lvb_kms(lsm, lvb, &kms);
460 lov_stripe_unlock(lsm);
462 cl_lvb2attr(lov_attr, lvb);
463 lov_attr->cat_kms = kms;
464 r0->lo_attr_valid = 1;
467 if (result == 0) { /* merge results */
468 attr->cat_blocks = lov_attr->cat_blocks;
469 attr->cat_size = lov_attr->cat_size;
470 attr->cat_kms = lov_attr->cat_kms;
471 if (attr->cat_atime < lov_attr->cat_atime)
472 attr->cat_atime = lov_attr->cat_atime;
473 if (attr->cat_ctime < lov_attr->cat_ctime)
474 attr->cat_ctime = lov_attr->cat_ctime;
475 if (attr->cat_mtime < lov_attr->cat_mtime)
476 attr->cat_mtime = lov_attr->cat_mtime;
481 const static struct lov_layout_operations lov_dispatch[] = {
483 .llo_init = lov_init_empty,
484 .llo_delete = lov_delete_empty,
485 .llo_fini = lov_fini_empty,
486 .llo_install = lov_install_empty,
487 .llo_print = lov_print_empty,
488 .llo_page_init = lov_page_init_empty,
489 .llo_lock_init = lov_lock_init_empty,
490 .llo_io_init = lov_io_init_empty,
491 .llo_getattr = lov_attr_get_empty
494 .llo_init = lov_init_raid0,
495 .llo_delete = lov_delete_raid0,
496 .llo_fini = lov_fini_raid0,
497 .llo_install = lov_install_raid0,
498 .llo_print = lov_print_raid0,
499 .llo_page_init = lov_page_init_raid0,
500 .llo_lock_init = lov_lock_init_raid0,
501 .llo_io_init = lov_io_init_raid0,
502 .llo_getattr = lov_attr_get_raid0
508 * Performs a double-dispatch based on the layout type of an object.
510 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
512 struct lov_object *__obj = (obj); \
513 enum lov_layout_type __llt; \
515 __llt = __obj->lo_type; \
516 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
517 lov_dispatch[__llt].op(__VA_ARGS__); \
520 static inline void lov_conf_freeze(struct lov_object *lov)
522 if (lov->lo_owner != cfs_current())
523 down_read(&lov->lo_type_guard);
526 static inline void lov_conf_thaw(struct lov_object *lov)
528 if (lov->lo_owner != cfs_current())
529 up_read(&lov->lo_type_guard);
532 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
534 struct lov_object *__obj = (obj); \
535 int __lock = !!(lock); \
536 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
539 lov_conf_freeze(__obj); \
540 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
542 lov_conf_thaw(__obj); \
547 * Performs a locked double-dispatch based on the layout type of an object.
549 #define LOV_2DISPATCH(obj, op, ...) \
550 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
552 #define LOV_2DISPATCH_VOID(obj, op, ...) \
554 struct lov_object *__obj = (obj); \
555 enum lov_layout_type __llt; \
557 lov_conf_freeze(__obj); \
558 __llt = __obj->lo_type; \
559 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
560 lov_dispatch[__llt].op(__VA_ARGS__); \
561 lov_conf_thaw(__obj); \
564 static void lov_conf_lock(struct lov_object *lov)
566 LASSERT(lov->lo_owner != cfs_current());
567 down_write(&lov->lo_type_guard);
568 LASSERT(lov->lo_owner == NULL);
569 lov->lo_owner = cfs_current();
572 static void lov_conf_unlock(struct lov_object *lov)
574 lov->lo_owner = NULL;
575 up_write(&lov->lo_type_guard);
578 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
580 struct l_wait_info lwi = { 0 };
583 while (cfs_atomic_read(&lov->lo_active_ios) > 0) {
584 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
585 PFID(lu_object_fid(lov2lu(lov))),
586 cfs_atomic_read(&lov->lo_active_ios));
588 l_wait_event(lov->lo_waitq,
589 cfs_atomic_read(&lov->lo_active_ios) == 0, &lwi);
594 static int lov_layout_change(const struct lu_env *unused,
595 struct lov_object *lov,
596 const struct cl_object_conf *conf)
599 enum lov_layout_type llt = LLT_EMPTY;
600 union lov_layout_state *state = &lov->u;
601 const struct lov_layout_operations *old_ops;
602 const struct lov_layout_operations *new_ops;
604 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
610 LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
612 if (conf->u.coc_md != NULL && conf->u.coc_md->lsm != NULL)
613 llt = LLT_RAID0; /* only raid0 is supported. */
614 LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
616 cookie = cl_env_reenter();
617 env = cl_env_get(&refcheck);
619 cl_env_reexit(cookie);
620 RETURN(PTR_ERR(env));
623 old_ops = &lov_dispatch[lov->lo_type];
624 new_ops = &lov_dispatch[llt];
626 result = old_ops->llo_delete(env, lov, &lov->u);
628 old_ops->llo_fini(env, lov, &lov->u);
630 LASSERT(cfs_atomic_read(&lov->lo_active_ios) == 0);
631 LASSERT(hdr->coh_tree.rnode == NULL);
632 LASSERT(hdr->coh_pages == 0);
634 lov->lo_type = LLT_EMPTY;
635 result = new_ops->llo_init(env,
636 lu2lov_dev(lov->lo_cl.co_lu.lo_dev),
639 new_ops->llo_install(env, lov, state);
642 new_ops->llo_delete(env, lov, state);
643 new_ops->llo_fini(env, lov, state);
644 /* this file becomes an EMPTY file. */
648 cl_env_put(env, &refcheck);
649 cl_env_reexit(cookie);
653 /*****************************************************************************
655 * Lov object operations.
659 int lov_object_init(const struct lu_env *env, struct lu_object *obj,
660 const struct lu_object_conf *conf)
662 struct lov_device *dev = lu2lov_dev(obj->lo_dev);
663 struct lov_object *lov = lu2lov(obj);
664 const struct cl_object_conf *cconf = lu2cl_conf(conf);
665 union lov_layout_state *set = &lov->u;
666 const struct lov_layout_operations *ops;
670 init_rwsem(&lov->lo_type_guard);
671 cfs_atomic_set(&lov->lo_active_ios, 0);
672 cfs_waitq_init(&lov->lo_waitq);
674 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
676 /* no locking is necessary, as object is being created */
677 lov->lo_type = cconf->u.coc_md->lsm != NULL ? LLT_RAID0 : LLT_EMPTY;
678 ops = &lov_dispatch[lov->lo_type];
679 result = ops->llo_init(env, dev, lov, cconf, set);
681 ops->llo_install(env, lov, set);
685 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
686 const struct cl_object_conf *conf)
688 struct lov_stripe_md *lsm = NULL;
689 struct lov_object *lov = cl2lov(obj);
694 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
695 lov->lo_layout_invalid = true;
696 GOTO(out, result = 0);
699 if (conf->coc_opc == OBJECT_CONF_WAIT) {
700 if (lov->lo_layout_invalid &&
701 cfs_atomic_read(&lov->lo_active_ios) > 0) {
702 lov_conf_unlock(lov);
703 result = lov_layout_wait(env, lov);
709 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
711 if (conf->u.coc_md != NULL)
712 lsm = conf->u.coc_md->lsm;
713 if ((lsm == NULL && lov->lo_lsm == NULL) ||
714 (lsm != NULL && lov->lo_lsm != NULL &&
715 lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen)) {
716 /* same version of layout */
717 lov->lo_layout_invalid = false;
718 GOTO(out, result = 0);
721 /* will change layout - check if there still exists active IO. */
722 if (cfs_atomic_read(&lov->lo_active_ios) > 0) {
723 lov->lo_layout_invalid = true;
724 GOTO(out, result = -EBUSY);
727 lov->lo_layout_invalid = lov_layout_change(env, lov, conf);
731 lov_conf_unlock(lov);
735 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
737 struct lov_object *lov = lu2lov(obj);
740 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
744 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
746 struct lov_object *lov = lu2lov(obj);
749 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
751 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
755 static int lov_object_print(const struct lu_env *env, void *cookie,
756 lu_printer_t p, const struct lu_object *o)
758 return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
761 int lov_page_init(const struct lu_env *env, struct cl_object *obj,
762 struct cl_page *page, cfs_page_t *vmpage)
764 return LOV_2DISPATCH_NOLOCK(cl2lov(obj),
765 llo_page_init, env, obj, page, vmpage);
769 * Implements cl_object_operations::clo_io_init() method for lov
770 * layer. Dispatches to the appropriate layout io initialization method.
772 int lov_io_init(const struct lu_env *env, struct cl_object *obj,
775 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
776 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
777 !io->ci_ignore_layout, env, obj, io);
781 * An implementation of cl_object_operations::clo_attr_get() method for lov
782 * layer. For raid0 layout this collects and merges attributes of all
785 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
786 struct cl_attr *attr)
788 /* do not take lock, as this function is called under a
789 * spin-lock. Layout is protected from changing by ongoing IO. */
790 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
793 static int lov_attr_set(const struct lu_env *env, struct cl_object *obj,
794 const struct cl_attr *attr, unsigned valid)
797 * No dispatch is required here, as no layout implements this.
802 int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
803 struct cl_lock *lock, const struct cl_io *io)
805 /* No need to lock because we've taken one refcount of layout. */
806 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
810 static const struct cl_object_operations lov_ops = {
811 .coo_page_init = lov_page_init,
812 .coo_lock_init = lov_lock_init,
813 .coo_io_init = lov_io_init,
814 .coo_attr_get = lov_attr_get,
815 .coo_attr_set = lov_attr_set,
816 .coo_conf_set = lov_conf_set
819 static const struct lu_object_operations lov_lu_obj_ops = {
820 .loo_object_init = lov_object_init,
821 .loo_object_delete = lov_object_delete,
822 .loo_object_release = NULL,
823 .loo_object_free = lov_object_free,
824 .loo_object_print = lov_object_print,
825 .loo_object_invariant = NULL
828 struct lu_object *lov_object_alloc(const struct lu_env *env,
829 const struct lu_object_header *unused,
830 struct lu_device *dev)
832 struct lov_object *lov;
833 struct lu_object *obj;
836 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, CFS_ALLOC_IO);
839 lu_object_init(obj, NULL, dev);
840 lov->lo_cl.co_ops = &lov_ops;
841 lov->lo_type = -1; /* invalid, to catch uninitialized type */
843 * object io operation vector (cl_object::co_iop) is installed
844 * later in lov_object_init(), as different vectors are used
845 * for object with different layouts.
847 obj->lo_ops = &lov_lu_obj_ops;
853 struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
855 struct lov_stripe_md *lsm = NULL;
857 lov_conf_freeze(lov);
858 if (lov->lo_lsm != NULL) {
859 lsm = lsm_addref(lov->lo_lsm);
860 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
861 lsm, cfs_atomic_read(&lsm->lsm_refc),
862 lov->lo_layout_invalid, cfs_current());
868 void lov_lsm_decref(struct lov_object *lov, struct lov_stripe_md *lsm)
873 CDEBUG(D_INODE, "lsm %p decref %d by %p.\n",
874 lsm, cfs_atomic_read(&lsm->lsm_refc), cfs_current());
876 lov_free_memmd(&lsm);
879 struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
881 struct lu_object *luobj;
882 struct lov_stripe_md *lsm = NULL;
887 luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
890 lsm = lov_lsm_addref(lu2lov(luobj));
893 EXPORT_SYMBOL(lov_lsm_get);
895 void lov_lsm_put(struct cl_object *unused, struct lov_stripe_md *lsm)
898 lov_free_memmd(&lsm);
900 EXPORT_SYMBOL(lov_lsm_put);
902 int lov_read_and_clear_async_rc(struct cl_object *clob)
904 struct lu_object *luobj;
908 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
911 struct lov_object *lov = lu2lov(luobj);
913 lov_conf_freeze(lov);
914 switch (lov->lo_type) {
916 struct lov_stripe_md *lsm;
920 LASSERT(lsm != NULL);
921 for (i = 0; i < lsm->lsm_stripe_count; i++) {
922 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
923 if (loi->loi_ar.ar_rc && !rc)
924 rc = loi->loi_ar.ar_rc;
925 loi->loi_ar.ar_rc = 0;
937 EXPORT_SYMBOL(lov_read_and_clear_async_rc);