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,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 * Client Lustre Object.
33 * Author: Nikita Danilov <nikita.danilov@sun.com>
34 * Author: Jinshan Xiong <jinshan.xiong@intel.com>
46 #define DEBUG_SUBSYSTEM S_CLASS
48 #include <linux/list.h>
49 #include <libcfs/libcfs.h>
50 #include <obd_class.h>
51 #include <obd_support.h>
52 #include <lustre_fid.h>
53 #include <cl_object.h>
54 #include <lu_object.h>
55 #include "cl_internal.h"
57 static struct kmem_cache *cl_env_kmem;
58 struct kmem_cache *cl_dio_aio_kmem;
59 struct kmem_cache *cl_page_kmem_array[16];
60 unsigned short cl_page_kmem_size_array[16];
62 /** Lock class of cl_object_header::coh_attr_guard */
63 static struct lock_class_key cl_attr_guard_class;
66 * Initialize cl_object_header.
68 int cl_object_header_init(struct cl_object_header *h)
73 result = lu_object_header_init(&h->coh_lu);
75 spin_lock_init(&h->coh_attr_guard);
76 lockdep_set_class(&h->coh_attr_guard, &cl_attr_guard_class);
77 h->coh_page_bufsize = 0;
81 EXPORT_SYMBOL(cl_object_header_init);
84 * Finalize cl_object_header.
86 void cl_object_header_fini(struct cl_object_header *h)
88 lu_object_header_fini(&h->coh_lu);
92 * Returns a cl_object with a given \a fid.
94 * Returns either cached or newly created object. Additional reference on the
95 * returned object is acquired.
97 * \see lu_object_find(), cl_page_find(), cl_lock_find()
99 struct cl_object *cl_object_find(const struct lu_env *env,
100 struct cl_device *cd, const struct lu_fid *fid,
101 const struct cl_object_conf *c)
104 return lu2cl(lu_object_find_slice(env, cl2lu_dev(cd), fid, &c->coc_lu));
106 EXPORT_SYMBOL(cl_object_find);
109 * Releases a reference on \a o.
111 * When last reference is released object is returned to the cache, unless
112 * lu_object_header_flags::LU_OBJECT_HEARD_BANSHEE bit is set in its header.
114 * \see cl_page_put(), cl_lock_put().
116 void cl_object_put(const struct lu_env *env, struct cl_object *o)
118 lu_object_put(env, &o->co_lu);
120 EXPORT_SYMBOL(cl_object_put);
123 * Acquire an additional reference to the object \a o.
125 * This can only be used to acquire _additional_ reference, i.e., caller
126 * already has to possess at least one reference to \a o before calling this.
128 * \see cl_page_get(), cl_lock_get().
130 void cl_object_get(struct cl_object *o)
132 lu_object_get(&o->co_lu);
134 EXPORT_SYMBOL(cl_object_get);
137 * Returns the top-object for a given \a o.
141 struct cl_object *cl_object_top(struct cl_object *o)
143 struct cl_object_header *hdr = cl_object_header(o);
144 struct cl_object *top;
146 while (hdr->coh_parent != NULL)
147 hdr = hdr->coh_parent;
149 top = lu2cl(lu_object_top(&hdr->coh_lu));
150 CDEBUG(D_TRACE, "%p -> %p\n", o, top);
153 EXPORT_SYMBOL(cl_object_top);
156 * Returns pointer to the lock protecting data-attributes for the given object
159 * Data-attributes are protected by the cl_object_header::coh_attr_guard
160 * spin-lock in the top-object.
162 * \see cl_attr, cl_object_attr_lock(), cl_object_operations::coo_attr_get().
164 static spinlock_t *cl_object_attr_guard(struct cl_object *o)
166 return &cl_object_header(cl_object_top(o))->coh_attr_guard;
170 * Locks data-attributes.
172 * Prevents data-attributes from changing, until lock is released by
173 * cl_object_attr_unlock(). This has to be called before calls to
174 * cl_object_attr_get(), cl_object_attr_update().
176 void cl_object_attr_lock(struct cl_object *o)
177 __acquires(cl_object_attr_guard(o))
179 spin_lock(cl_object_attr_guard(o));
181 EXPORT_SYMBOL(cl_object_attr_lock);
184 * Releases data-attributes lock, acquired by cl_object_attr_lock().
186 void cl_object_attr_unlock(struct cl_object *o)
187 __releases(cl_object_attr_guard(o))
189 spin_unlock(cl_object_attr_guard(o));
191 EXPORT_SYMBOL(cl_object_attr_unlock);
194 * Returns data-attributes of an object \a obj.
196 * Every layer is asked (by calling cl_object_operations::coo_attr_get())
197 * top-to-bottom to fill in parts of \a attr that this layer is responsible
200 int cl_object_attr_get(const struct lu_env *env, struct cl_object *top,
201 struct cl_attr *attr)
203 struct cl_object *obj;
206 assert_spin_locked(cl_object_attr_guard(top));
209 cl_object_for_each(obj, top) {
210 if (obj->co_ops->coo_attr_get != NULL) {
211 result = obj->co_ops->coo_attr_get(env, obj, attr);
221 EXPORT_SYMBOL(cl_object_attr_get);
224 * Updates data-attributes of an object \a obj.
226 * Only attributes, mentioned in a validness bit-mask \a v are
227 * updated. Calls cl_object_operations::coo_upd_attr() on every layer, bottom
230 int cl_object_attr_update(const struct lu_env *env, struct cl_object *top,
231 const struct cl_attr *attr, unsigned v)
233 struct cl_object *obj;
236 assert_spin_locked(cl_object_attr_guard(top));
239 cl_object_for_each_reverse(obj, top) {
240 if (obj->co_ops->coo_attr_update != NULL) {
241 result = obj->co_ops->coo_attr_update(env, obj, attr,
252 EXPORT_SYMBOL(cl_object_attr_update);
255 * Notifies layers (bottom-to-top) that glimpse AST was received.
257 * Layers have to fill \a lvb fields with information that will be shipped
258 * back to glimpse issuer.
260 * \see cl_lock_operations::clo_glimpse()
262 int cl_object_glimpse(const struct lu_env *env, struct cl_object *top,
265 struct cl_object *obj;
269 cl_object_for_each_reverse(obj, top) {
270 if (obj->co_ops->coo_glimpse != NULL) {
271 result = obj->co_ops->coo_glimpse(env, obj, lvb);
276 LU_OBJECT_HEADER(D_DLMTRACE, env, lu_object_top(top->co_lu.lo_header),
277 "size: %llu mtime: %llu atime: %llu "
278 "ctime: %llu blocks: %llu\n",
279 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime,
280 lvb->lvb_ctime, lvb->lvb_blocks);
283 EXPORT_SYMBOL(cl_object_glimpse);
286 * Updates a configuration of an object \a obj.
288 int cl_conf_set(const struct lu_env *env, struct cl_object *top,
289 const struct cl_object_conf *conf)
291 struct cl_object *obj;
295 cl_object_for_each(obj, top) {
296 if (obj->co_ops->coo_conf_set != NULL) {
297 result = obj->co_ops->coo_conf_set(env, obj, conf);
304 EXPORT_SYMBOL(cl_conf_set);
307 * Prunes caches of pages and locks for this object.
309 int cl_object_prune(const struct lu_env *env, struct cl_object *top)
311 struct cl_object *obj;
315 cl_object_for_each(obj, top) {
316 if (obj->co_ops->coo_prune != NULL) {
317 result = obj->co_ops->coo_prune(env, obj);
325 EXPORT_SYMBOL(cl_object_prune);
328 * Get stripe information of this object.
330 int cl_object_getstripe(const struct lu_env *env, struct cl_object *top,
331 struct lov_user_md __user *uarg, size_t size)
333 struct cl_object *obj;
337 cl_object_for_each(obj, top) {
338 if (obj->co_ops->coo_getstripe) {
339 result = obj->co_ops->coo_getstripe(env, obj, uarg,
347 EXPORT_SYMBOL(cl_object_getstripe);
350 * Get fiemap extents from file object.
352 * \param env [in] lustre environment
353 * \param obj [in] file object
354 * \param key [in] fiemap request argument
355 * \param fiemap [out] fiemap extents mapping retrived
356 * \param buflen [in] max buffer length of @fiemap
361 int cl_object_fiemap(const struct lu_env *env, struct cl_object *top,
362 struct ll_fiemap_info_key *key,
363 struct fiemap *fiemap, size_t *buflen)
365 struct cl_object *obj;
369 cl_object_for_each(obj, top) {
370 if (obj->co_ops->coo_fiemap) {
371 result = obj->co_ops->coo_fiemap(env, obj, key, fiemap,
379 EXPORT_SYMBOL(cl_object_fiemap);
381 int cl_object_layout_get(const struct lu_env *env, struct cl_object *top,
382 struct cl_layout *cl)
384 struct cl_object *obj;
387 cl_object_for_each(obj, top) {
388 if (obj->co_ops->coo_layout_get)
389 return obj->co_ops->coo_layout_get(env, obj, cl);
394 EXPORT_SYMBOL(cl_object_layout_get);
396 loff_t cl_object_maxbytes(struct cl_object *top)
398 struct cl_object *obj;
399 loff_t maxbytes = LLONG_MAX;
402 cl_object_for_each(obj, top) {
403 if (obj->co_ops->coo_maxbytes)
404 maxbytes = min_t(loff_t, obj->co_ops->coo_maxbytes(obj),
410 EXPORT_SYMBOL(cl_object_maxbytes);
412 int cl_object_flush(const struct lu_env *env, struct cl_object *top,
413 struct ldlm_lock *lock)
415 struct cl_object *obj;
419 cl_object_for_each(obj, top) {
420 if (obj->co_ops->coo_object_flush) {
421 rc = obj->co_ops->coo_object_flush(env, obj, lock);
428 EXPORT_SYMBOL(cl_object_flush);
431 * Helper function removing all object locks, and marking object for
432 * deletion. All object pages must have been deleted at this point.
434 * This is called by cl_inode_fini() and lov_object_delete() to destroy top-
435 * and sub- objects respectively.
437 void cl_object_kill(const struct lu_env *env, struct cl_object *obj)
439 struct cl_object_header *hdr = cl_object_header(obj);
441 set_bit(LU_OBJECT_HEARD_BANSHEE, &hdr->coh_lu.loh_flags);
443 EXPORT_SYMBOL(cl_object_kill);
445 void cache_stats_init(struct cache_stats *cs, const char *name)
450 for (i = 0; i < CS_NR; i++)
451 atomic_set(&cs->cs_stats[i], 0);
454 static int cache_stats_print(const struct cache_stats *cs,
455 struct seq_file *m, int h)
460 * lookup hit total cached create
461 * env: ...... ...... ...... ...... ......
464 const char *names[CS_NR] = CS_NAMES;
466 seq_printf(m, "%6s", " ");
467 for (i = 0; i < CS_NR; i++)
468 seq_printf(m, "%8s", names[i]);
472 seq_printf(m, "%5.5s:", cs->cs_name);
473 for (i = 0; i < CS_NR; i++)
474 seq_printf(m, "%8u", atomic_read(&cs->cs_stats[i]));
478 static void cl_env_percpu_refill(void);
481 * Initialize client site.
483 * Perform common initialization (lu_site_init()), and initialize statistical
484 * counters. Also perform global initializations on the first call.
486 int cl_site_init(struct cl_site *s, struct cl_device *d)
491 result = lu_site_init(&s->cs_lu, &d->cd_lu_dev);
493 cache_stats_init(&s->cs_pages, "pages");
494 for (i = 0; i < ARRAY_SIZE(s->cs_pages_state); ++i)
495 atomic_set(&s->cs_pages_state[0], 0);
496 cl_env_percpu_refill();
500 EXPORT_SYMBOL(cl_site_init);
503 * Finalize client site. Dual to cl_site_init().
505 void cl_site_fini(struct cl_site *s)
507 lu_site_fini(&s->cs_lu);
509 EXPORT_SYMBOL(cl_site_fini);
511 static struct cache_stats cl_env_stats = {
513 .cs_stats = { ATOMIC_INIT(0), }
517 * Outputs client site statistical counters into a buffer. Suitable for
518 * ll_rd_*()-style functions.
520 int cl_site_stats_print(const struct cl_site *site, struct seq_file *m)
522 static const char *const pstate[] = {
532 lookup hit total busy create
533 pages: ...... ...... ...... ...... ...... [...... ...... ...... ......]
534 locks: ...... ...... ...... ...... ...... [...... ...... ...... ...... ......]
535 env: ...... ...... ...... ...... ......
537 lu_site_stats_seq_print(&site->cs_lu, m);
538 cache_stats_print(&site->cs_pages, m, 1);
540 for (i = 0; i < ARRAY_SIZE(site->cs_pages_state); ++i)
541 seq_printf(m, "%s: %u ", pstate[i],
542 atomic_read(&site->cs_pages_state[i]));
543 seq_printf(m, "]\n");
544 cache_stats_print(&cl_env_stats, m, 0);
548 EXPORT_SYMBOL(cl_site_stats_print);
550 /*****************************************************************************
552 * lu_env handling on client.
556 static unsigned cl_envs_cached_max = 32; /* XXX: prototype: arbitrary limit
558 static struct cl_env_cache {
561 struct list_head cec_envs;
567 struct lu_context ce_ses;
570 * Linkage into global list of all client environments. Used for
571 * garbage collection.
573 struct list_head ce_linkage;
579 * Debugging field: address of the caller who made original
585 static void cl_env_inc(enum cache_stats_item item)
587 #ifdef CONFIG_DEBUG_PAGESTATE_TRACKING
588 atomic_inc(&cl_env_stats.cs_stats[item]);
592 static void cl_env_dec(enum cache_stats_item item)
594 #ifdef CONFIG_DEBUG_PAGESTATE_TRACKING
595 LASSERT(atomic_read(&cl_env_stats.cs_stats[item]) > 0);
596 atomic_dec(&cl_env_stats.cs_stats[item]);
600 static void cl_env_init0(struct cl_env *cle, void *debug)
602 LASSERT(cle->ce_ref == 0);
603 LASSERT(cle->ce_magic == &cl_env_init0);
604 LASSERT(cle->ce_debug == NULL);
607 cle->ce_debug = debug;
611 static struct lu_env *cl_env_new(__u32 ctx_tags, __u32 ses_tags, void *debug)
616 OBD_SLAB_ALLOC_PTR_GFP(cle, cl_env_kmem, GFP_NOFS);
620 INIT_LIST_HEAD(&cle->ce_linkage);
621 cle->ce_magic = &cl_env_init0;
623 rc = lu_env_init(env, LCT_CL_THREAD|ctx_tags);
625 rc = lu_context_init(&cle->ce_ses,
626 LCT_SESSION | ses_tags);
628 lu_context_enter(&cle->ce_ses);
629 env->le_ses = &cle->ce_ses;
630 cl_env_init0(cle, debug);
635 OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
638 cl_env_inc(CS_create);
639 cl_env_inc(CS_total);
642 env = ERR_PTR(-ENOMEM);
646 static void cl_env_fini(struct cl_env *cle)
648 cl_env_dec(CS_total);
649 lu_context_fini(&cle->ce_lu.le_ctx);
650 lu_context_fini(&cle->ce_ses);
651 OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
654 /* Get a cl_env, either from the per-CPU cache for the current CPU, or by
655 * allocating a new one.
657 static struct lu_env *cl_env_obtain(void *debug)
665 read_lock(&cl_envs[cpu].cec_guard);
666 LASSERT(equi(cl_envs[cpu].cec_count == 0,
667 list_empty(&cl_envs[cpu].cec_envs)));
668 if (cl_envs[cpu].cec_count > 0) {
671 cle = container_of(cl_envs[cpu].cec_envs.next, struct cl_env,
673 list_del_init(&cle->ce_linkage);
674 cl_envs[cpu].cec_count--;
675 read_unlock(&cl_envs[cpu].cec_guard);
679 rc = lu_env_refill(env);
681 cl_env_init0(cle, debug);
682 lu_context_enter(&env->le_ctx);
683 lu_context_enter(&cle->ce_ses);
689 read_unlock(&cl_envs[cpu].cec_guard);
691 env = cl_env_new(lu_context_tags_default,
692 lu_session_tags_default, debug);
697 static inline struct cl_env *cl_env_container(struct lu_env *env)
699 return container_of(env, struct cl_env, ce_lu);
705 * No link to thread, this returns an env from the cache or
706 * allocates a new one.
708 * If you need to get the specific environment you created for this thread,
709 * you must either pass the pointer directly or store it in the file/inode
710 * private data and retrieve it from there using ll_cl_add/ll_cl_find.
712 * \param refcheck pointer to a counter used to detect environment leaks. In
713 * the usual case cl_env_get() and cl_env_put() are called in the same lexical
714 * scope and pointer to the same integer is passed as \a refcheck. This is
715 * used to detect missed cl_env_put().
719 struct lu_env *cl_env_get(__u16 *refcheck)
723 env = cl_env_obtain(__builtin_return_address(0));
727 cle = cl_env_container(env);
728 *refcheck = cle->ce_ref;
729 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
733 EXPORT_SYMBOL(cl_env_get);
736 * Forces an allocation of a fresh environment with given tags.
740 struct lu_env *cl_env_alloc(__u16 *refcheck, __u32 tags)
744 env = cl_env_new(tags, tags, __builtin_return_address(0));
748 cle = cl_env_container(env);
749 *refcheck = cle->ce_ref;
750 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
754 EXPORT_SYMBOL(cl_env_alloc);
756 static void cl_env_exit(struct cl_env *cle)
758 lu_context_exit(&cle->ce_lu.le_ctx);
759 lu_context_exit(&cle->ce_ses);
763 * Finalizes and frees a given number of cached environments. This is done to
764 * (1) free some memory (not currently hooked into VM), or (2) release
765 * references to modules.
767 unsigned cl_env_cache_purge(unsigned nr)
773 for_each_possible_cpu(i) {
774 write_lock(&cl_envs[i].cec_guard);
775 for (; !list_empty(&cl_envs[i].cec_envs) && nr > 0; --nr) {
776 cle = container_of(cl_envs[i].cec_envs.next,
777 struct cl_env, ce_linkage);
778 list_del_init(&cle->ce_linkage);
779 LASSERT(cl_envs[i].cec_count > 0);
780 cl_envs[i].cec_count--;
781 write_unlock(&cl_envs[i].cec_guard);
784 write_lock(&cl_envs[i].cec_guard);
786 LASSERT(equi(cl_envs[i].cec_count == 0,
787 list_empty(&cl_envs[i].cec_envs)));
788 write_unlock(&cl_envs[i].cec_guard);
792 EXPORT_SYMBOL(cl_env_cache_purge);
795 * Release an environment.
797 * Decrement \a env reference counter. When counter drops to 0, nothing in
798 * this thread is using environment and it is returned to the per-CPU cache or
799 * freed immediately if the cache is full.
801 void cl_env_put(struct lu_env *env, __u16 *refcheck)
805 cle = cl_env_container(env);
807 LASSERT(cle->ce_ref > 0);
808 LASSERT(ergo(refcheck != NULL, cle->ce_ref == *refcheck));
810 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
811 if (--cle->ce_ref == 0) {
815 cle->ce_debug = NULL;
818 * Don't bother to take a lock here.
820 * Return environment to the cache only when it was allocated
821 * with the standard tags.
823 if (cl_envs[cpu].cec_count < cl_envs_cached_max &&
824 (env->le_ctx.lc_tags & ~LCT_HAS_EXIT) == lu_context_tags_default &&
825 (env->le_ses->lc_tags & ~LCT_HAS_EXIT) == lu_session_tags_default) {
826 read_lock(&cl_envs[cpu].cec_guard);
827 list_add(&cle->ce_linkage, &cl_envs[cpu].cec_envs);
828 cl_envs[cpu].cec_count++;
829 read_unlock(&cl_envs[cpu].cec_guard);
835 EXPORT_SYMBOL(cl_env_put);
838 * Converts struct cl_attr to struct ost_lvb.
842 void cl_attr2lvb(struct ost_lvb *lvb, const struct cl_attr *attr)
844 lvb->lvb_size = attr->cat_size;
845 lvb->lvb_mtime = attr->cat_mtime;
846 lvb->lvb_atime = attr->cat_atime;
847 lvb->lvb_ctime = attr->cat_ctime;
848 lvb->lvb_blocks = attr->cat_blocks;
852 * Converts struct ost_lvb to struct cl_attr.
856 void cl_lvb2attr(struct cl_attr *attr, const struct ost_lvb *lvb)
858 attr->cat_size = lvb->lvb_size;
859 attr->cat_mtime = lvb->lvb_mtime;
860 attr->cat_atime = lvb->lvb_atime;
861 attr->cat_ctime = lvb->lvb_ctime;
862 attr->cat_blocks = lvb->lvb_blocks;
864 EXPORT_SYMBOL(cl_lvb2attr);
866 static struct cl_env cl_env_percpu[NR_CPUS];
867 static DEFINE_MUTEX(cl_env_percpu_mutex);
869 static int cl_env_percpu_init(void)
872 int tags = LCT_REMEMBER | LCT_NOREF;
876 for_each_possible_cpu(i) {
879 rwlock_init(&cl_envs[i].cec_guard);
880 INIT_LIST_HEAD(&cl_envs[i].cec_envs);
881 cl_envs[i].cec_count = 0;
883 cle = &cl_env_percpu[i];
886 INIT_LIST_HEAD(&cle->ce_linkage);
887 cle->ce_magic = &cl_env_init0;
888 rc = lu_env_init(env, LCT_CL_THREAD | tags);
890 rc = lu_context_init(&cle->ce_ses, LCT_SESSION | tags);
892 lu_context_enter(&cle->ce_ses);
893 env->le_ses = &cle->ce_ses;
902 /* Indices 0 to i (excluding i) were correctly initialized,
903 * thus we must uninitialize up to i, the rest are undefined. */
904 for (j = 0; j < i; j++) {
905 cle = &cl_env_percpu[j];
906 lu_context_exit(&cle->ce_ses);
907 lu_context_fini(&cle->ce_ses);
908 lu_env_fini(&cle->ce_lu);
915 static void cl_env_percpu_fini(void)
919 for_each_possible_cpu(i) {
920 struct cl_env *cle = &cl_env_percpu[i];
922 lu_context_exit(&cle->ce_ses);
923 lu_context_fini(&cle->ce_ses);
924 lu_env_fini(&cle->ce_lu);
928 static void cl_env_percpu_refill(void)
932 mutex_lock(&cl_env_percpu_mutex);
933 for_each_possible_cpu(i)
934 lu_env_refill(&cl_env_percpu[i].ce_lu);
935 mutex_unlock(&cl_env_percpu_mutex);
938 void cl_env_percpu_put(struct lu_env *env)
943 cpu = smp_processor_id();
944 cle = cl_env_container(env);
945 LASSERT(cle == &cl_env_percpu[cpu]);
948 LASSERT(cle->ce_ref == 0);
951 cle->ce_debug = NULL;
955 EXPORT_SYMBOL(cl_env_percpu_put);
957 struct lu_env *cl_env_percpu_get(void)
961 cle = &cl_env_percpu[get_cpu()];
962 cl_env_init0(cle, __builtin_return_address(0));
966 EXPORT_SYMBOL(cl_env_percpu_get);
968 /*****************************************************************************
970 * Temporary prototype thing: mirror obd-devices into cl devices.
974 struct cl_device *cl_type_setup(const struct lu_env *env, struct lu_site *site,
975 struct lu_device_type *ldt,
976 struct lu_device *next)
978 const char *typename;
981 LASSERT(ldt != NULL);
983 typename = ldt->ldt_name;
984 d = ldt->ldt_ops->ldto_device_alloc(env, ldt, NULL);
990 rc = ldt->ldt_ops->ldto_device_init(env, d, typename, next);
993 lu_ref_add(&d->ld_reference,
994 "lu-stack", &lu_site_init);
996 ldt->ldt_ops->ldto_device_free(env, d);
997 CERROR("can't init device '%s', %d\n", typename, rc);
1001 CERROR("Cannot allocate device: '%s'\n", typename);
1002 return lu2cl_dev(d);
1004 EXPORT_SYMBOL(cl_type_setup);
1007 * Finalize device stack by calling lu_stack_fini().
1009 void cl_stack_fini(const struct lu_env *env, struct cl_device *cl)
1011 lu_stack_fini(env, cl2lu_dev(cl));
1013 EXPORT_SYMBOL(cl_stack_fini);
1015 static struct lu_context_key cl_key;
1017 struct cl_thread_info *cl_env_info(const struct lu_env *env)
1019 return lu_context_key_get(&env->le_ctx, &cl_key);
1022 /* defines cl_key_{init,fini}() */
1023 LU_KEY_INIT_FINI(cl, struct cl_thread_info);
1025 static struct lu_context_key cl_key = {
1026 .lct_tags = LCT_CL_THREAD,
1027 .lct_init = cl_key_init,
1028 .lct_fini = cl_key_fini,
1031 static struct lu_kmem_descr cl_object_caches[] = {
1033 .ckd_cache = &cl_env_kmem,
1034 .ckd_name = "cl_env_kmem",
1035 .ckd_size = sizeof(struct cl_env)
1038 .ckd_cache = &cl_dio_aio_kmem,
1039 .ckd_name = "cl_dio_aio_kmem",
1040 .ckd_size = sizeof(struct cl_dio_aio)
1048 * Global initialization of cl-data. Create kmem caches, register
1049 * lu_context_key's, etc.
1051 * \see cl_global_fini()
1053 int cl_global_init(void)
1057 OBD_ALLOC_PTR_ARRAY(cl_envs, num_possible_cpus());
1058 if (cl_envs == NULL)
1059 GOTO(out, result = -ENOMEM);
1061 result = lu_kmem_init(cl_object_caches);
1063 GOTO(out_envs, result);
1065 LU_CONTEXT_KEY_INIT(&cl_key);
1066 result = lu_context_key_register(&cl_key);
1068 GOTO(out_kmem, result);
1070 result = cl_env_percpu_init();
1071 if (result) /* no cl_env_percpu_fini on error */
1072 GOTO(out_keys, result);
1077 lu_context_key_degister(&cl_key);
1079 lu_kmem_fini(cl_object_caches);
1081 OBD_FREE_PTR_ARRAY(cl_envs, num_possible_cpus());
1087 * Finalization of global cl-data. Dual to cl_global_init().
1089 void cl_global_fini(void)
1093 for (i = 0; i < ARRAY_SIZE(cl_page_kmem_array); i++) {
1094 if (cl_page_kmem_array[i]) {
1095 kmem_cache_destroy(cl_page_kmem_array[i]);
1096 cl_page_kmem_array[i] = NULL;
1099 cl_env_percpu_fini();
1100 lu_context_key_degister(&cl_key);
1101 lu_kmem_fini(cl_object_caches);
1102 OBD_FREE_PTR_ARRAY(cl_envs, num_possible_cpus());