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27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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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"
50 /*****************************************************************************
56 struct lov_layout_operations {
57 int (*llo_init)(const struct lu_env *env, struct lov_device *dev,
58 struct lov_object *lov,
59 const struct cl_object_conf *conf,
60 union lov_layout_state *state);
61 int (*llo_delete)(const struct lu_env *env, struct lov_object *lov,
62 union lov_layout_state *state);
63 void (*llo_fini)(const struct lu_env *env, struct lov_object *lov,
64 union lov_layout_state *state);
65 void (*llo_install)(const struct lu_env *env, struct lov_object *lov,
66 union lov_layout_state *state);
67 int (*llo_print)(const struct lu_env *env, void *cookie,
68 lu_printer_t p, const struct lu_object *o);
69 int (*llo_page_init)(const struct lu_env *env, struct cl_object *obj,
70 struct cl_page *page, pgoff_t index);
71 int (*llo_lock_init)(const struct lu_env *env,
72 struct cl_object *obj, struct cl_lock *lock,
73 const struct cl_io *io);
74 int (*llo_io_init)(const struct lu_env *env,
75 struct cl_object *obj, struct cl_io *io);
76 int (*llo_getattr)(const struct lu_env *env, struct cl_object *obj,
77 struct cl_attr *attr);
80 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov);
82 /*****************************************************************************
84 * Lov object layout operations.
88 static void lov_install_empty(const struct lu_env *env,
89 struct lov_object *lov,
90 union lov_layout_state *state)
93 * File without objects.
97 static int lov_init_empty(const struct lu_env *env,
98 struct lov_device *dev, struct lov_object *lov,
99 const struct cl_object_conf *conf,
100 union lov_layout_state *state)
105 static void lov_install_raid0(const struct lu_env *env,
106 struct lov_object *lov,
107 union lov_layout_state *state)
111 static struct cl_object *lov_sub_find(const struct lu_env *env,
112 struct cl_device *dev,
113 const struct lu_fid *fid,
114 const struct cl_object_conf *conf)
119 o = lu_object_find_at(env, cl2lu_dev(dev), fid, &conf->coc_lu);
120 LASSERT(ergo(!IS_ERR(o), o->lo_dev->ld_type == &lovsub_device_type));
124 static int lov_init_sub(const struct lu_env *env, struct lov_object *lov,
125 struct cl_object *stripe, struct lov_layout_raid0 *r0,
128 struct cl_object_header *hdr;
129 struct cl_object_header *subhdr;
130 struct cl_object_header *parent;
131 struct lov_oinfo *oinfo;
134 if (OBD_FAIL_CHECK(OBD_FAIL_LOV_INIT)) {
135 /* For sanity:test_206.
136 * Do not leave the object in cache to avoid accessing
137 * freed memory. This is because osc_object is referring to
138 * lov_oinfo of lsm_stripe_data which will be freed due to
140 cl_object_kill(env, stripe);
141 cl_object_put(env, stripe);
145 hdr = cl_object_header(lov2cl(lov));
146 subhdr = cl_object_header(stripe);
148 oinfo = lov->lo_lsm->lsm_oinfo[idx];
149 CDEBUG(D_INODE, DFID"@%p[%d] -> "DFID"@%p: ostid: "DOSTID
150 " idx: %d gen: %d\n",
151 PFID(&subhdr->coh_lu.loh_fid), subhdr, idx,
152 PFID(&hdr->coh_lu.loh_fid), hdr, POSTID(&oinfo->loi_oi),
153 oinfo->loi_ost_idx, oinfo->loi_ost_gen);
155 /* reuse ->coh_attr_guard to protect coh_parent change */
156 spin_lock(&subhdr->coh_attr_guard);
157 parent = subhdr->coh_parent;
158 if (parent == NULL) {
159 subhdr->coh_parent = hdr;
160 spin_unlock(&subhdr->coh_attr_guard);
161 subhdr->coh_nesting = hdr->coh_nesting + 1;
162 lu_object_ref_add(&stripe->co_lu, "lov-parent", lov);
163 r0->lo_sub[idx] = cl2lovsub(stripe);
164 r0->lo_sub[idx]->lso_super = lov;
165 r0->lo_sub[idx]->lso_index = idx;
168 struct lu_object *old_obj;
169 struct lov_object *old_lov;
170 unsigned int mask = D_INODE;
172 spin_unlock(&subhdr->coh_attr_guard);
173 old_obj = lu_object_locate(&parent->coh_lu, &lov_device_type);
174 LASSERT(old_obj != NULL);
175 old_lov = cl2lov(lu2cl(old_obj));
176 if (old_lov->lo_layout_invalid) {
177 /* the object's layout has already changed but isn't
179 lu_object_unhash(env, &stripe->co_lu);
186 LU_OBJECT_DEBUG(mask, env, &stripe->co_lu,
187 "stripe %d is already owned.\n", idx);
188 LU_OBJECT_DEBUG(mask, env, old_obj, "owned.\n");
189 LU_OBJECT_HEADER(mask, env, lov2lu(lov), "try to own.\n");
190 cl_object_put(env, stripe);
195 static int lov_page_slice_fixup(struct lov_object *lov,
196 struct cl_object *stripe)
198 struct cl_object_header *hdr = cl_object_header(&lov->lo_cl);
201 cl_object_for_each(o, stripe)
202 o->co_slice_off += hdr->coh_page_bufsize;
204 return cl_object_header(stripe)->coh_page_bufsize;
207 static int lov_init_raid0(const struct lu_env *env,
208 struct lov_device *dev, struct lov_object *lov,
209 const struct cl_object_conf *conf,
210 union lov_layout_state *state)
215 struct cl_object *stripe;
216 struct lov_thread_info *lti = lov_env_info(env);
217 struct cl_object_conf *subconf = <i->lti_stripe_conf;
218 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
219 struct lu_fid *ofid = <i->lti_fid;
220 struct lov_layout_raid0 *r0 = &state->raid0;
224 if (lsm->lsm_magic != LOV_MAGIC_V1 && lsm->lsm_magic != LOV_MAGIC_V3) {
225 dump_lsm(D_ERROR, lsm);
226 LASSERTF(0, "magic mismatch, expected %d/%d, actual %d.\n",
227 LOV_MAGIC_V1, LOV_MAGIC_V3, lsm->lsm_magic);
230 LASSERT(lov->lo_lsm == NULL);
231 lov->lo_lsm = lsm_addref(lsm);
232 r0->lo_nr = lsm->lsm_stripe_count;
233 LASSERT(r0->lo_nr <= lov_targets_nr(dev));
235 lov->lo_layout_invalid = true;
237 OBD_ALLOC_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
238 if (r0->lo_sub != NULL) {
242 subconf->coc_inode = conf->coc_inode;
243 spin_lock_init(&r0->lo_sub_lock);
245 * Create stripe cl_objects.
247 for (i = 0; i < r0->lo_nr && result == 0; ++i) {
248 struct cl_device *subdev;
249 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
250 int ost_idx = oinfo->loi_ost_idx;
252 result = ostid_to_fid(ofid, &oinfo->loi_oi,
257 subdev = lovsub2cl_dev(dev->ld_target[ost_idx]);
258 subconf->u.coc_oinfo = oinfo;
259 LASSERTF(subdev != NULL, "not init ost %d\n", ost_idx);
260 /* In the function below, .hs_keycmp resolves to
261 * lu_obj_hop_keycmp() */
262 /* coverity[overrun-buffer-val] */
263 stripe = lov_sub_find(env, subdev, ofid, subconf);
264 if (!IS_ERR(stripe)) {
265 result = lov_init_sub(env, lov, stripe, r0, i);
266 if (result == -EAGAIN) { /* try again */
272 result = PTR_ERR(stripe);
276 int sz = lov_page_slice_fixup(lov, stripe);
277 LASSERT(ergo(psz > 0, psz == sz));
282 cl_object_header(&lov->lo_cl)->coh_page_bufsize += psz;
289 static int lov_init_released(const struct lu_env *env,
290 struct lov_device *dev, struct lov_object *lov,
291 const struct cl_object_conf *conf,
292 union lov_layout_state *state)
294 struct lov_stripe_md *lsm = conf->u.coc_md->lsm;
296 LASSERT(lsm != NULL);
297 LASSERT(lsm_is_released(lsm));
298 LASSERT(lov->lo_lsm == NULL);
300 lov->lo_lsm = lsm_addref(lsm);
304 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
305 union lov_layout_state *state)
307 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
309 lov_layout_wait(env, lov);
311 cl_locks_prune(env, &lov->lo_cl, 0);
315 static void lov_subobject_kill(const struct lu_env *env, struct lov_object *lov,
316 struct lovsub_object *los, int idx)
318 struct cl_object *sub;
319 struct lov_layout_raid0 *r0;
320 struct lu_site *site;
321 struct lu_site_bkt_data *bkt;
322 wait_queue_t *waiter;
325 LASSERT(r0->lo_sub[idx] == los);
327 sub = lovsub2cl(los);
328 site = sub->co_lu.lo_dev->ld_site;
329 bkt = lu_site_bkt_from_fid(site, &sub->co_lu.lo_header->loh_fid);
331 cl_object_kill(env, sub);
332 /* release a reference to the sub-object and ... */
333 lu_object_ref_del(&sub->co_lu, "lov-parent", lov);
334 cl_object_put(env, sub);
336 /* ... wait until it is actually destroyed---sub-object clears its
337 * ->lo_sub[] slot in lovsub_object_fini() */
338 if (r0->lo_sub[idx] == los) {
339 waiter = &lov_env_info(env)->lti_waiter;
340 init_waitqueue_entry_current(waiter);
341 add_wait_queue(&bkt->lsb_marche_funebre, waiter);
342 set_current_state(TASK_UNINTERRUPTIBLE);
344 /* this wait-queue is signaled at the end of
345 * lu_object_free(). */
346 set_current_state(TASK_UNINTERRUPTIBLE);
347 spin_lock(&r0->lo_sub_lock);
348 if (r0->lo_sub[idx] == los) {
349 spin_unlock(&r0->lo_sub_lock);
350 waitq_wait(waiter, TASK_UNINTERRUPTIBLE);
352 spin_unlock(&r0->lo_sub_lock);
353 set_current_state(TASK_RUNNING);
357 remove_wait_queue(&bkt->lsb_marche_funebre, waiter);
359 LASSERT(r0->lo_sub[idx] == NULL);
362 static int lov_delete_raid0(const struct lu_env *env, struct lov_object *lov,
363 union lov_layout_state *state)
365 struct lov_layout_raid0 *r0 = &state->raid0;
366 struct lov_stripe_md *lsm = lov->lo_lsm;
371 dump_lsm(D_INODE, lsm);
373 lov_layout_wait(env, lov);
374 if (r0->lo_sub != NULL) {
375 for (i = 0; i < r0->lo_nr; ++i) {
376 struct lovsub_object *los = r0->lo_sub[i];
379 cl_locks_prune(env, &los->lso_cl, 1);
381 * If top-level object is to be evicted from
382 * the cache, so are its sub-objects.
384 lov_subobject_kill(env, lov, los, i);
388 cl_locks_prune(env, &lov->lo_cl, 0);
392 static void lov_fini_empty(const struct lu_env *env, struct lov_object *lov,
393 union lov_layout_state *state)
395 LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
398 static void lov_fini_raid0(const struct lu_env *env, struct lov_object *lov,
399 union lov_layout_state *state)
401 struct lov_layout_raid0 *r0 = &state->raid0;
404 if (r0->lo_sub != NULL) {
405 OBD_FREE_LARGE(r0->lo_sub, r0->lo_nr * sizeof r0->lo_sub[0]);
409 dump_lsm(D_INODE, lov->lo_lsm);
410 lov_free_memmd(&lov->lo_lsm);
415 static void lov_fini_released(const struct lu_env *env, struct lov_object *lov,
416 union lov_layout_state *state)
419 dump_lsm(D_INODE, lov->lo_lsm);
420 lov_free_memmd(&lov->lo_lsm);
424 static int lov_print_empty(const struct lu_env *env, void *cookie,
425 lu_printer_t p, const struct lu_object *o)
427 (*p)(env, cookie, "empty %d\n", lu2lov(o)->lo_layout_invalid);
431 static int lov_print_raid0(const struct lu_env *env, void *cookie,
432 lu_printer_t p, const struct lu_object *o)
434 struct lov_object *lov = lu2lov(o);
435 struct lov_layout_raid0 *r0 = lov_r0(lov);
436 struct lov_stripe_md *lsm = lov->lo_lsm;
439 (*p)(env, cookie, "stripes: %d, %s, lsm{%p 0x%08X %d %u %u}:\n",
440 r0->lo_nr, 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);
443 for (i = 0; i < r0->lo_nr; ++i) {
444 struct lu_object *sub;
446 if (r0->lo_sub[i] != NULL) {
447 sub = lovsub2lu(r0->lo_sub[i]);
448 lu_object_print(env, cookie, p, sub);
450 (*p)(env, cookie, "sub %d absent\n", i);
456 static int lov_print_released(const struct lu_env *env, void *cookie,
457 lu_printer_t p, const struct lu_object *o)
459 struct lov_object *lov = lu2lov(o);
460 struct lov_stripe_md *lsm = lov->lo_lsm;
463 "released: %s, lsm{%p 0x%08X %d %u %u}:\n",
464 lov->lo_layout_invalid ? "invalid" : "valid", lsm,
465 lsm->lsm_magic, cfs_atomic_read(&lsm->lsm_refc),
466 lsm->lsm_stripe_count, lsm->lsm_layout_gen);
471 * Implements cl_object_operations::coo_attr_get() method for an object
472 * without stripes (LLT_EMPTY layout type).
474 * The only attributes this layer is authoritative in this case is
475 * cl_attr::cat_blocks---it's 0.
477 static int lov_attr_get_empty(const struct lu_env *env, struct cl_object *obj,
478 struct cl_attr *attr)
480 attr->cat_blocks = 0;
484 static int lov_attr_get_raid0(const struct lu_env *env, struct cl_object *obj,
485 struct cl_attr *attr)
487 struct lov_object *lov = cl2lov(obj);
488 struct lov_layout_raid0 *r0 = lov_r0(lov);
489 struct cl_attr *lov_attr = &r0->lo_attr;
494 /* this is called w/o holding type guard mutex, so it must be inside
495 * an on going IO otherwise lsm may be replaced.
496 * LU-2117: it turns out there exists one exception. For mmaped files,
497 * the lock of those files may be requested in the other file's IO
498 * context, and this function is called in ccc_lock_state(), it will
499 * hit this assertion.
500 * Anyway, it's still okay to call attr_get w/o type guard as layout
501 * can't go if locks exist. */
502 /* LASSERT(cfs_atomic_read(&lsm->lsm_refc) > 1); */
504 if (!r0->lo_attr_valid) {
505 struct lov_stripe_md *lsm = lov->lo_lsm;
506 struct ost_lvb *lvb = &lov_env_info(env)->lti_lvb;
509 memset(lvb, 0, sizeof(*lvb));
510 /* XXX: timestamps can be negative by sanity:test_39m,
512 lvb->lvb_atime = LLONG_MIN;
513 lvb->lvb_ctime = LLONG_MIN;
514 lvb->lvb_mtime = LLONG_MIN;
517 * XXX that should be replaced with a loop over sub-objects,
518 * doing cl_object_attr_get() on them. But for now, let's
519 * reuse old lov code.
523 * XXX take lsm spin-lock to keep lov_merge_lvb_kms()
524 * happy. It's not needed, because new code uses
525 * ->coh_attr_guard spin-lock to protect consistency of
526 * sub-object attributes.
528 lov_stripe_lock(lsm);
529 result = lov_merge_lvb_kms(lsm, lvb, &kms);
530 lov_stripe_unlock(lsm);
532 cl_lvb2attr(lov_attr, lvb);
533 lov_attr->cat_kms = kms;
534 r0->lo_attr_valid = 1;
537 if (result == 0) { /* merge results */
538 attr->cat_blocks = lov_attr->cat_blocks;
539 attr->cat_size = lov_attr->cat_size;
540 attr->cat_kms = lov_attr->cat_kms;
541 if (attr->cat_atime < lov_attr->cat_atime)
542 attr->cat_atime = lov_attr->cat_atime;
543 if (attr->cat_ctime < lov_attr->cat_ctime)
544 attr->cat_ctime = lov_attr->cat_ctime;
545 if (attr->cat_mtime < lov_attr->cat_mtime)
546 attr->cat_mtime = lov_attr->cat_mtime;
551 const static struct lov_layout_operations lov_dispatch[] = {
553 .llo_init = lov_init_empty,
554 .llo_delete = lov_delete_empty,
555 .llo_fini = lov_fini_empty,
556 .llo_install = lov_install_empty,
557 .llo_print = lov_print_empty,
558 .llo_page_init = lov_page_init_empty,
559 .llo_lock_init = lov_lock_init_empty,
560 .llo_io_init = lov_io_init_empty,
561 .llo_getattr = lov_attr_get_empty
564 .llo_init = lov_init_raid0,
565 .llo_delete = lov_delete_raid0,
566 .llo_fini = lov_fini_raid0,
567 .llo_install = lov_install_raid0,
568 .llo_print = lov_print_raid0,
569 .llo_page_init = lov_page_init_raid0,
570 .llo_lock_init = lov_lock_init_raid0,
571 .llo_io_init = lov_io_init_raid0,
572 .llo_getattr = lov_attr_get_raid0
575 .llo_init = lov_init_released,
576 .llo_delete = lov_delete_empty,
577 .llo_fini = lov_fini_released,
578 .llo_install = lov_install_empty,
579 .llo_print = lov_print_released,
580 .llo_page_init = lov_page_init_empty,
581 .llo_lock_init = lov_lock_init_empty,
582 .llo_io_init = lov_io_init_released,
583 .llo_getattr = lov_attr_get_empty
588 * Performs a double-dispatch based on the layout type of an object.
590 #define LOV_2DISPATCH_NOLOCK(obj, op, ...) \
592 struct lov_object *__obj = (obj); \
593 enum lov_layout_type __llt; \
595 __llt = __obj->lo_type; \
596 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
597 lov_dispatch[__llt].op(__VA_ARGS__); \
601 * Return lov_layout_type associated with a given lsm
603 enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
607 if (lsm_is_released(lsm))
612 static inline void lov_conf_freeze(struct lov_object *lov)
614 if (lov->lo_owner != current)
615 down_read(&lov->lo_type_guard);
618 static inline void lov_conf_thaw(struct lov_object *lov)
620 if (lov->lo_owner != current)
621 up_read(&lov->lo_type_guard);
624 #define LOV_2DISPATCH_MAYLOCK(obj, op, lock, ...) \
626 struct lov_object *__obj = (obj); \
627 int __lock = !!(lock); \
628 typeof(lov_dispatch[0].op(__VA_ARGS__)) __result; \
631 lov_conf_freeze(__obj); \
632 __result = LOV_2DISPATCH_NOLOCK(obj, op, __VA_ARGS__); \
634 lov_conf_thaw(__obj); \
639 * Performs a locked double-dispatch based on the layout type of an object.
641 #define LOV_2DISPATCH(obj, op, ...) \
642 LOV_2DISPATCH_MAYLOCK(obj, op, 1, __VA_ARGS__)
644 #define LOV_2DISPATCH_VOID(obj, op, ...) \
646 struct lov_object *__obj = (obj); \
647 enum lov_layout_type __llt; \
649 lov_conf_freeze(__obj); \
650 __llt = __obj->lo_type; \
651 LASSERT(0 <= __llt && __llt < ARRAY_SIZE(lov_dispatch)); \
652 lov_dispatch[__llt].op(__VA_ARGS__); \
653 lov_conf_thaw(__obj); \
656 static void lov_conf_lock(struct lov_object *lov)
658 LASSERT(lov->lo_owner != current);
659 down_write(&lov->lo_type_guard);
660 LASSERT(lov->lo_owner == NULL);
661 lov->lo_owner = current;
664 static void lov_conf_unlock(struct lov_object *lov)
666 lov->lo_owner = NULL;
667 up_write(&lov->lo_type_guard);
670 static int lov_layout_wait(const struct lu_env *env, struct lov_object *lov)
672 struct l_wait_info lwi = { 0 };
675 while (cfs_atomic_read(&lov->lo_active_ios) > 0) {
676 CDEBUG(D_INODE, "file:"DFID" wait for active IO, now: %d.\n",
677 PFID(lu_object_fid(lov2lu(lov))),
678 cfs_atomic_read(&lov->lo_active_ios));
680 l_wait_event(lov->lo_waitq,
681 cfs_atomic_read(&lov->lo_active_ios) == 0, &lwi);
686 static int lov_layout_change(const struct lu_env *unused,
687 struct lov_object *lov,
688 const struct cl_object_conf *conf)
691 enum lov_layout_type llt = LLT_EMPTY;
692 union lov_layout_state *state = &lov->u;
693 const struct lov_layout_operations *old_ops;
694 const struct lov_layout_operations *new_ops;
701 LASSERT(0 <= lov->lo_type && lov->lo_type < ARRAY_SIZE(lov_dispatch));
703 if (conf->u.coc_md != NULL)
704 llt = lov_type(conf->u.coc_md->lsm);
705 LASSERT(0 <= llt && llt < ARRAY_SIZE(lov_dispatch));
707 cookie = cl_env_reenter();
708 env = cl_env_get(&refcheck);
710 cl_env_reexit(cookie);
711 RETURN(PTR_ERR(env));
714 CDEBUG(D_INODE, DFID" from %s to %s\n",
715 PFID(lu_object_fid(lov2lu(lov))),
716 llt2str(lov->lo_type), llt2str(llt));
718 old_ops = &lov_dispatch[lov->lo_type];
719 new_ops = &lov_dispatch[llt];
721 cl_object_prune(env, &lov->lo_cl);
723 result = old_ops->llo_delete(env, lov, &lov->u);
725 old_ops->llo_fini(env, lov, &lov->u);
727 LASSERT(cfs_atomic_read(&lov->lo_active_ios) == 0);
729 lov->lo_type = LLT_EMPTY;
730 result = new_ops->llo_init(env,
731 lu2lov_dev(lov->lo_cl.co_lu.lo_dev),
734 new_ops->llo_install(env, lov, state);
737 new_ops->llo_delete(env, lov, state);
738 new_ops->llo_fini(env, lov, state);
739 /* this file becomes an EMPTY file. */
743 cl_env_put(env, &refcheck);
744 cl_env_reexit(cookie);
748 /*****************************************************************************
750 * Lov object operations.
753 int lov_object_init(const struct lu_env *env, struct lu_object *obj,
754 const struct lu_object_conf *conf)
756 struct lov_device *dev = lu2lov_dev(obj->lo_dev);
757 struct lov_object *lov = lu2lov(obj);
758 const struct cl_object_conf *cconf = lu2cl_conf(conf);
759 union lov_layout_state *set = &lov->u;
760 const struct lov_layout_operations *ops;
764 init_rwsem(&lov->lo_type_guard);
765 cfs_atomic_set(&lov->lo_active_ios, 0);
766 init_waitqueue_head(&lov->lo_waitq);
768 cl_object_page_init(lu2cl(obj), sizeof(struct lov_page));
770 /* no locking is necessary, as object is being created */
771 lov->lo_type = lov_type(cconf->u.coc_md->lsm);
772 ops = &lov_dispatch[lov->lo_type];
773 result = ops->llo_init(env, dev, lov, cconf, set);
775 ops->llo_install(env, lov, set);
779 static int lov_conf_set(const struct lu_env *env, struct cl_object *obj,
780 const struct cl_object_conf *conf)
782 struct lov_stripe_md *lsm = NULL;
783 struct lov_object *lov = cl2lov(obj);
788 if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
789 lov->lo_layout_invalid = true;
790 GOTO(out, result = 0);
793 if (conf->coc_opc == OBJECT_CONF_WAIT) {
794 if (lov->lo_layout_invalid &&
795 cfs_atomic_read(&lov->lo_active_ios) > 0) {
796 lov_conf_unlock(lov);
797 result = lov_layout_wait(env, lov);
803 LASSERT(conf->coc_opc == OBJECT_CONF_SET);
805 if (conf->u.coc_md != NULL)
806 lsm = conf->u.coc_md->lsm;
807 if ((lsm == NULL && lov->lo_lsm == NULL) ||
808 ((lsm != NULL && lov->lo_lsm != NULL) &&
809 (lov->lo_lsm->lsm_layout_gen == lsm->lsm_layout_gen) &&
810 (lov->lo_lsm->lsm_pattern == lsm->lsm_pattern))) {
811 /* same version of layout */
812 lov->lo_layout_invalid = false;
813 GOTO(out, result = 0);
816 /* will change layout - check if there still exists active IO. */
817 if (cfs_atomic_read(&lov->lo_active_ios) > 0) {
818 lov->lo_layout_invalid = true;
819 GOTO(out, result = -EBUSY);
822 lov->lo_layout_invalid = lov_layout_change(env, lov, conf);
826 lov_conf_unlock(lov);
827 CDEBUG(D_INODE, DFID" lo_layout_invalid=%d\n",
828 PFID(lu_object_fid(lov2lu(lov))), lov->lo_layout_invalid);
832 static void lov_object_delete(const struct lu_env *env, struct lu_object *obj)
834 struct lov_object *lov = lu2lov(obj);
837 LOV_2DISPATCH_VOID(lov, llo_delete, env, lov, &lov->u);
841 static void lov_object_free(const struct lu_env *env, struct lu_object *obj)
843 struct lov_object *lov = lu2lov(obj);
846 LOV_2DISPATCH_VOID(lov, llo_fini, env, lov, &lov->u);
848 OBD_SLAB_FREE_PTR(lov, lov_object_kmem);
852 static int lov_object_print(const struct lu_env *env, void *cookie,
853 lu_printer_t p, const struct lu_object *o)
855 return LOV_2DISPATCH_NOLOCK(lu2lov(o), llo_print, env, cookie, p, o);
858 int lov_page_init(const struct lu_env *env, struct cl_object *obj,
859 struct cl_page *page, pgoff_t index)
861 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_page_init, env, obj, page,
866 * Implements cl_object_operations::clo_io_init() method for lov
867 * layer. Dispatches to the appropriate layout io initialization method.
869 int lov_io_init(const struct lu_env *env, struct cl_object *obj,
872 CL_IO_SLICE_CLEAN(lov_env_io(env), lis_cl);
873 return LOV_2DISPATCH_MAYLOCK(cl2lov(obj), llo_io_init,
874 !io->ci_ignore_layout, env, obj, io);
878 * An implementation of cl_object_operations::clo_attr_get() method for lov
879 * layer. For raid0 layout this collects and merges attributes of all
882 static int lov_attr_get(const struct lu_env *env, struct cl_object *obj,
883 struct cl_attr *attr)
885 /* do not take lock, as this function is called under a
886 * spin-lock. Layout is protected from changing by ongoing IO. */
887 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_getattr, env, obj, attr);
890 static int lov_attr_set(const struct lu_env *env, struct cl_object *obj,
891 const struct cl_attr *attr, unsigned valid)
894 * No dispatch is required here, as no layout implements this.
899 int lov_lock_init(const struct lu_env *env, struct cl_object *obj,
900 struct cl_lock *lock, const struct cl_io *io)
902 /* No need to lock because we've taken one refcount of layout. */
903 return LOV_2DISPATCH_NOLOCK(cl2lov(obj), llo_lock_init, env, obj, lock,
907 static const struct cl_object_operations lov_ops = {
908 .coo_page_init = lov_page_init,
909 .coo_lock_init = lov_lock_init,
910 .coo_io_init = lov_io_init,
911 .coo_attr_get = lov_attr_get,
912 .coo_attr_set = lov_attr_set,
913 .coo_conf_set = lov_conf_set
916 static const struct lu_object_operations lov_lu_obj_ops = {
917 .loo_object_init = lov_object_init,
918 .loo_object_delete = lov_object_delete,
919 .loo_object_release = NULL,
920 .loo_object_free = lov_object_free,
921 .loo_object_print = lov_object_print,
922 .loo_object_invariant = NULL
925 struct lu_object *lov_object_alloc(const struct lu_env *env,
926 const struct lu_object_header *unused,
927 struct lu_device *dev)
929 struct lov_object *lov;
930 struct lu_object *obj;
933 OBD_SLAB_ALLOC_PTR_GFP(lov, lov_object_kmem, GFP_NOFS);
936 lu_object_init(obj, NULL, dev);
937 lov->lo_cl.co_ops = &lov_ops;
938 lov->lo_type = -1; /* invalid, to catch uninitialized type */
940 * object io operation vector (cl_object::co_iop) is installed
941 * later in lov_object_init(), as different vectors are used
942 * for object with different layouts.
944 obj->lo_ops = &lov_lu_obj_ops;
950 struct lov_stripe_md *lov_lsm_addref(struct lov_object *lov)
952 struct lov_stripe_md *lsm = NULL;
954 lov_conf_freeze(lov);
955 if (lov->lo_lsm != NULL) {
956 lsm = lsm_addref(lov->lo_lsm);
957 CDEBUG(D_INODE, "lsm %p addref %d/%d by %p.\n",
958 lsm, cfs_atomic_read(&lsm->lsm_refc),
959 lov->lo_layout_invalid, current);
965 struct lov_stripe_md *lov_lsm_get(struct cl_object *clobj)
967 struct lu_object *luobj;
968 struct lov_stripe_md *lsm = NULL;
973 luobj = lu_object_locate(&cl_object_header(clobj)->coh_lu,
976 lsm = lov_lsm_addref(lu2lov(luobj));
979 EXPORT_SYMBOL(lov_lsm_get);
981 void lov_lsm_put(struct cl_object *unused, struct lov_stripe_md *lsm)
984 lov_free_memmd(&lsm);
986 EXPORT_SYMBOL(lov_lsm_put);
988 int lov_read_and_clear_async_rc(struct cl_object *clob)
990 struct lu_object *luobj;
994 luobj = lu_object_locate(&cl_object_header(clob)->coh_lu,
997 struct lov_object *lov = lu2lov(luobj);
999 lov_conf_freeze(lov);
1000 switch (lov->lo_type) {
1002 struct lov_stripe_md *lsm;
1006 LASSERT(lsm != NULL);
1007 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1008 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1009 if (loi->loi_ar.ar_rc && !rc)
1010 rc = loi->loi_ar.ar_rc;
1011 loi->loi_ar.ar_rc = 0;
1024 EXPORT_SYMBOL(lov_read_and_clear_async_rc);