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_sub_dio_kmem;
60 struct kmem_cache *cl_page_kmem_array[16];
61 unsigned short cl_page_kmem_size_array[16];
63 /** Lock class of cl_object_header::coh_attr_guard */
64 static struct lock_class_key cl_attr_guard_class;
67 * Initialize cl_object_header.
69 int cl_object_header_init(struct cl_object_header *h)
74 result = lu_object_header_init(&h->coh_lu);
76 spin_lock_init(&h->coh_attr_guard);
77 lockdep_set_class(&h->coh_attr_guard, &cl_attr_guard_class);
78 h->coh_page_bufsize = 0;
82 EXPORT_SYMBOL(cl_object_header_init);
85 * Finalize cl_object_header.
87 void cl_object_header_fini(struct cl_object_header *h)
89 lu_object_header_fini(&h->coh_lu);
93 * Returns a cl_object with a given \a fid.
95 * Returns either cached or newly created object. Additional reference on the
96 * returned object is acquired.
98 * \see lu_object_find(), cl_page_find(), cl_lock_find()
100 struct cl_object *cl_object_find(const struct lu_env *env,
101 struct cl_device *cd, const struct lu_fid *fid,
102 const struct cl_object_conf *c)
105 return lu2cl(lu_object_find_slice(env, cl2lu_dev(cd), fid, &c->coc_lu));
107 EXPORT_SYMBOL(cl_object_find);
110 * Releases a reference on \a o.
112 * When last reference is released object is returned to the cache, unless
113 * lu_object_header_flags::LU_OBJECT_HEARD_BANSHEE bit is set in its header.
115 * \see cl_page_put(), cl_lock_put().
117 void cl_object_put(const struct lu_env *env, struct cl_object *o)
119 lu_object_put(env, &o->co_lu);
121 EXPORT_SYMBOL(cl_object_put);
124 * Acquire an additional reference to the object \a o.
126 * This can only be used to acquire _additional_ reference, i.e., caller
127 * already has to possess at least one reference to \a o before calling this.
129 * \see cl_page_get(), cl_lock_get().
131 void cl_object_get(struct cl_object *o)
133 lu_object_get(&o->co_lu);
135 EXPORT_SYMBOL(cl_object_get);
138 * Returns the top-object for a given \a o.
142 struct cl_object *cl_object_top(struct cl_object *o)
144 struct cl_object_header *hdr = cl_object_header(o);
145 struct cl_object *top;
147 while (hdr->coh_parent != NULL)
148 hdr = hdr->coh_parent;
150 top = lu2cl(lu_object_top(&hdr->coh_lu));
151 CDEBUG(D_TRACE, "%p -> %p\n", o, top);
154 EXPORT_SYMBOL(cl_object_top);
157 * Returns pointer to the lock protecting data-attributes for the given object
160 * Data-attributes are protected by the cl_object_header::coh_attr_guard
161 * spin-lock in the top-object.
163 * \see cl_attr, cl_object_attr_lock(), cl_object_operations::coo_attr_get().
165 static spinlock_t *cl_object_attr_guard(struct cl_object *o)
167 return &cl_object_header(cl_object_top(o))->coh_attr_guard;
171 * Locks data-attributes.
173 * Prevents data-attributes from changing, until lock is released by
174 * cl_object_attr_unlock(). This has to be called before calls to
175 * cl_object_attr_get(), cl_object_attr_update().
177 void cl_object_attr_lock(struct cl_object *o)
178 __acquires(cl_object_attr_guard(o))
180 spin_lock(cl_object_attr_guard(o));
182 EXPORT_SYMBOL(cl_object_attr_lock);
185 * Releases data-attributes lock, acquired by cl_object_attr_lock().
187 void cl_object_attr_unlock(struct cl_object *o)
188 __releases(cl_object_attr_guard(o))
190 spin_unlock(cl_object_attr_guard(o));
192 EXPORT_SYMBOL(cl_object_attr_unlock);
195 * Returns data-attributes of an object \a obj.
197 * Every layer is asked (by calling cl_object_operations::coo_attr_get())
198 * top-to-bottom to fill in parts of \a attr that this layer is responsible
201 int cl_object_attr_get(const struct lu_env *env, struct cl_object *top,
202 struct cl_attr *attr)
204 struct cl_object *obj;
207 assert_spin_locked(cl_object_attr_guard(top));
210 cl_object_for_each(obj, top) {
211 if (obj->co_ops->coo_attr_get != NULL) {
212 result = obj->co_ops->coo_attr_get(env, obj, attr);
222 EXPORT_SYMBOL(cl_object_attr_get);
225 * Updates data-attributes of an object \a obj.
227 * Only attributes, mentioned in a validness bit-mask \a v are
228 * updated. Calls cl_object_operations::coo_upd_attr() on every layer, bottom
231 int cl_object_attr_update(const struct lu_env *env, struct cl_object *top,
232 const struct cl_attr *attr, unsigned v)
234 struct cl_object *obj;
237 assert_spin_locked(cl_object_attr_guard(top));
240 cl_object_for_each_reverse(obj, top) {
241 if (obj->co_ops->coo_attr_update != NULL) {
242 result = obj->co_ops->coo_attr_update(env, obj, attr,
253 EXPORT_SYMBOL(cl_object_attr_update);
256 * Notifies layers (bottom-to-top) that glimpse AST was received.
258 * Layers have to fill \a lvb fields with information that will be shipped
259 * back to glimpse issuer.
261 * \see cl_lock_operations::clo_glimpse()
263 int cl_object_glimpse(const struct lu_env *env, struct cl_object *top,
266 struct cl_object *obj;
270 cl_object_for_each_reverse(obj, top) {
271 if (obj->co_ops->coo_glimpse != NULL) {
272 result = obj->co_ops->coo_glimpse(env, obj, lvb);
277 LU_OBJECT_HEADER(D_DLMTRACE, env, lu_object_top(top->co_lu.lo_header),
278 "size: %llu mtime: %llu atime: %llu "
279 "ctime: %llu blocks: %llu\n",
280 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime,
281 lvb->lvb_ctime, lvb->lvb_blocks);
284 EXPORT_SYMBOL(cl_object_glimpse);
287 * Updates a configuration of an object \a obj.
289 int cl_conf_set(const struct lu_env *env, struct cl_object *top,
290 const struct cl_object_conf *conf)
292 struct cl_object *obj;
296 cl_object_for_each(obj, top) {
297 if (obj->co_ops->coo_conf_set != NULL) {
298 result = obj->co_ops->coo_conf_set(env, obj, conf);
305 EXPORT_SYMBOL(cl_conf_set);
308 * Prunes caches of pages and locks for this object.
310 int cl_object_prune(const struct lu_env *env, struct cl_object *top)
312 struct cl_object *obj;
316 cl_object_for_each(obj, top) {
317 if (obj->co_ops->coo_prune != NULL) {
318 result = obj->co_ops->coo_prune(env, obj);
326 EXPORT_SYMBOL(cl_object_prune);
329 * Get stripe information of this object.
331 int cl_object_getstripe(const struct lu_env *env, struct cl_object *top,
332 struct lov_user_md __user *uarg, size_t size)
334 struct cl_object *obj;
338 cl_object_for_each(obj, top) {
339 if (obj->co_ops->coo_getstripe) {
340 result = obj->co_ops->coo_getstripe(env, obj, uarg,
348 EXPORT_SYMBOL(cl_object_getstripe);
351 * Get fiemap extents from file object.
353 * \param env [in] lustre environment
354 * \param obj [in] file object
355 * \param key [in] fiemap request argument
356 * \param fiemap [out] fiemap extents mapping retrived
357 * \param buflen [in] max buffer length of @fiemap
362 int cl_object_fiemap(const struct lu_env *env, struct cl_object *top,
363 struct ll_fiemap_info_key *key,
364 struct fiemap *fiemap, size_t *buflen)
366 struct cl_object *obj;
370 cl_object_for_each(obj, top) {
371 if (obj->co_ops->coo_fiemap) {
372 result = obj->co_ops->coo_fiemap(env, obj, key, fiemap,
380 EXPORT_SYMBOL(cl_object_fiemap);
382 int cl_object_layout_get(const struct lu_env *env, struct cl_object *top,
383 struct cl_layout *cl)
385 struct cl_object *obj;
388 cl_object_for_each(obj, top) {
389 if (obj->co_ops->coo_layout_get)
390 return obj->co_ops->coo_layout_get(env, obj, cl);
395 EXPORT_SYMBOL(cl_object_layout_get);
397 loff_t cl_object_maxbytes(struct cl_object *top)
399 struct cl_object *obj;
400 loff_t maxbytes = LLONG_MAX;
403 cl_object_for_each(obj, top) {
404 if (obj->co_ops->coo_maxbytes)
405 maxbytes = min_t(loff_t, obj->co_ops->coo_maxbytes(obj),
411 EXPORT_SYMBOL(cl_object_maxbytes);
413 int cl_object_flush(const struct lu_env *env, struct cl_object *top,
414 struct ldlm_lock *lock)
416 struct cl_object *obj;
420 cl_object_for_each(obj, top) {
421 if (obj->co_ops->coo_object_flush) {
422 rc = obj->co_ops->coo_object_flush(env, obj, lock);
429 EXPORT_SYMBOL(cl_object_flush);
431 int cl_object_inode_ops(const struct lu_env *env, struct cl_object *top,
432 enum coo_inode_opc opc, void *data)
434 struct cl_object *obj;
439 cl_object_for_each(obj, top) {
440 if (obj->co_ops->coo_inode_ops) {
441 rc = obj->co_ops->coo_inode_ops(env, obj, opc, data);
448 EXPORT_SYMBOL(cl_object_inode_ops);
451 * Helper function removing all object locks, and marking object for
452 * deletion. All object pages must have been deleted at this point.
454 * This is called by cl_inode_fini() and lov_object_delete() to destroy top-
455 * and sub- objects respectively.
457 void cl_object_kill(const struct lu_env *env, struct cl_object *obj)
459 struct cl_object_header *hdr = cl_object_header(obj);
461 set_bit(LU_OBJECT_HEARD_BANSHEE, &hdr->coh_lu.loh_flags);
463 EXPORT_SYMBOL(cl_object_kill);
465 void cache_stats_init(struct cache_stats *cs, const char *name)
470 for (i = 0; i < CS_NR; i++)
471 atomic_set(&cs->cs_stats[i], 0);
474 static int cache_stats_print(const struct cache_stats *cs,
475 struct seq_file *m, int h)
480 * lookup hit total cached create
481 * env: ...... ...... ...... ...... ......
484 const char *names[CS_NR] = CS_NAMES;
486 seq_printf(m, "%6s", " ");
487 for (i = 0; i < CS_NR; i++)
488 seq_printf(m, "%8s", names[i]);
492 seq_printf(m, "%5.5s:", cs->cs_name);
493 for (i = 0; i < CS_NR; i++)
494 seq_printf(m, "%8u", atomic_read(&cs->cs_stats[i]));
498 static void cl_env_percpu_refill(void);
501 * Initialize client site.
503 * Perform common initialization (lu_site_init()), and initialize statistical
504 * counters. Also perform global initializations on the first call.
506 int cl_site_init(struct cl_site *s, struct cl_device *d)
511 result = lu_site_init(&s->cs_lu, &d->cd_lu_dev);
513 cache_stats_init(&s->cs_pages, "pages");
514 for (i = 0; i < ARRAY_SIZE(s->cs_pages_state); ++i)
515 atomic_set(&s->cs_pages_state[0], 0);
516 cl_env_percpu_refill();
520 EXPORT_SYMBOL(cl_site_init);
523 * Finalize client site. Dual to cl_site_init().
525 void cl_site_fini(struct cl_site *s)
527 lu_site_fini(&s->cs_lu);
529 EXPORT_SYMBOL(cl_site_fini);
531 static struct cache_stats cl_env_stats = {
533 .cs_stats = { ATOMIC_INIT(0), }
537 * Outputs client site statistical counters into a buffer. Suitable for
538 * ll_rd_*()-style functions.
540 int cl_site_stats_print(const struct cl_site *site, struct seq_file *m)
542 static const char *const pstate[] = {
552 lookup hit total busy create
553 pages: ...... ...... ...... ...... ...... [...... ...... ...... ......]
554 locks: ...... ...... ...... ...... ...... [...... ...... ...... ...... ......]
555 env: ...... ...... ...... ...... ......
557 lu_site_stats_seq_print(&site->cs_lu, m);
558 cache_stats_print(&site->cs_pages, m, 1);
560 for (i = 0; i < ARRAY_SIZE(site->cs_pages_state); ++i)
561 seq_printf(m, "%s: %u ", pstate[i],
562 atomic_read(&site->cs_pages_state[i]));
563 seq_printf(m, "]\n");
564 cache_stats_print(&cl_env_stats, m, 0);
568 EXPORT_SYMBOL(cl_site_stats_print);
570 /*****************************************************************************
572 * lu_env handling on client.
576 static unsigned cl_envs_cached_max = 32; /* XXX: prototype: arbitrary limit
578 static struct cl_env_cache {
581 struct list_head cec_envs;
587 struct lu_context ce_ses;
590 * Linkage into global list of all client environments. Used for
591 * garbage collection.
593 struct list_head ce_linkage;
599 * Debugging field: address of the caller who made original
605 static void cl_env_inc(enum cache_stats_item item)
607 #ifdef CONFIG_DEBUG_PAGESTATE_TRACKING
608 atomic_inc(&cl_env_stats.cs_stats[item]);
612 static void cl_env_dec(enum cache_stats_item item)
614 #ifdef CONFIG_DEBUG_PAGESTATE_TRACKING
615 LASSERT(atomic_read(&cl_env_stats.cs_stats[item]) > 0);
616 atomic_dec(&cl_env_stats.cs_stats[item]);
620 static void cl_env_init0(struct cl_env *cle, void *debug)
622 LASSERT(cle->ce_ref == 0);
623 LASSERT(cle->ce_magic == &cl_env_init0);
624 LASSERT(cle->ce_debug == NULL);
627 cle->ce_debug = debug;
631 static struct lu_env *cl_env_new(__u32 ctx_tags, __u32 ses_tags, void *debug)
636 OBD_SLAB_ALLOC_PTR_GFP(cle, cl_env_kmem, GFP_NOFS);
640 INIT_LIST_HEAD(&cle->ce_linkage);
641 cle->ce_magic = &cl_env_init0;
643 rc = lu_env_init(env, LCT_CL_THREAD|ctx_tags);
645 rc = lu_context_init(&cle->ce_ses,
646 LCT_SESSION | ses_tags);
648 lu_context_enter(&cle->ce_ses);
649 env->le_ses = &cle->ce_ses;
650 cl_env_init0(cle, debug);
655 OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
658 cl_env_inc(CS_create);
659 cl_env_inc(CS_total);
662 env = ERR_PTR(-ENOMEM);
666 static void cl_env_fini(struct cl_env *cle)
668 cl_env_dec(CS_total);
669 lu_context_fini(&cle->ce_lu.le_ctx);
670 lu_context_fini(&cle->ce_ses);
671 OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
674 /* Get a cl_env, either from the per-CPU cache for the current CPU, or by
675 * allocating a new one.
677 static struct lu_env *cl_env_obtain(void *debug)
685 read_lock(&cl_envs[cpu].cec_guard);
686 LASSERT(equi(cl_envs[cpu].cec_count == 0,
687 list_empty(&cl_envs[cpu].cec_envs)));
688 if (cl_envs[cpu].cec_count > 0) {
691 cle = container_of(cl_envs[cpu].cec_envs.next, struct cl_env,
693 list_del_init(&cle->ce_linkage);
694 cl_envs[cpu].cec_count--;
695 read_unlock(&cl_envs[cpu].cec_guard);
699 rc = lu_env_refill(env);
701 cl_env_init0(cle, debug);
702 lu_context_enter(&env->le_ctx);
703 lu_context_enter(&cle->ce_ses);
709 read_unlock(&cl_envs[cpu].cec_guard);
711 env = cl_env_new(lu_context_tags_default,
712 lu_session_tags_default, debug);
717 static inline struct cl_env *cl_env_container(struct lu_env *env)
719 return container_of(env, struct cl_env, ce_lu);
725 * No link to thread, this returns an env from the cache or
726 * allocates a new one.
728 * If you need to get the specific environment you created for this thread,
729 * you must either pass the pointer directly or store it in the file/inode
730 * private data and retrieve it from there using ll_cl_add/ll_cl_find.
732 * \param refcheck pointer to a counter used to detect environment leaks. In
733 * the usual case cl_env_get() and cl_env_put() are called in the same lexical
734 * scope and pointer to the same integer is passed as \a refcheck. This is
735 * used to detect missed cl_env_put().
739 struct lu_env *cl_env_get(__u16 *refcheck)
743 env = cl_env_obtain(__builtin_return_address(0));
747 cle = cl_env_container(env);
748 *refcheck = cle->ce_ref;
749 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
753 EXPORT_SYMBOL(cl_env_get);
756 * Forces an allocation of a fresh environment with given tags.
760 struct lu_env *cl_env_alloc(__u16 *refcheck, __u32 tags)
764 env = cl_env_new(tags, tags, __builtin_return_address(0));
768 cle = cl_env_container(env);
769 *refcheck = cle->ce_ref;
770 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
774 EXPORT_SYMBOL(cl_env_alloc);
776 static void cl_env_exit(struct cl_env *cle)
778 lu_context_exit(&cle->ce_lu.le_ctx);
779 lu_context_exit(&cle->ce_ses);
783 * Finalizes and frees a given number of cached environments. This is done to
784 * (1) free some memory (not currently hooked into VM), or (2) release
785 * references to modules.
787 unsigned cl_env_cache_purge(unsigned nr)
793 for_each_possible_cpu(i) {
794 write_lock(&cl_envs[i].cec_guard);
795 for (; !list_empty(&cl_envs[i].cec_envs) && nr > 0; --nr) {
796 cle = container_of(cl_envs[i].cec_envs.next,
797 struct cl_env, ce_linkage);
798 list_del_init(&cle->ce_linkage);
799 LASSERT(cl_envs[i].cec_count > 0);
800 cl_envs[i].cec_count--;
801 write_unlock(&cl_envs[i].cec_guard);
804 write_lock(&cl_envs[i].cec_guard);
806 LASSERT(equi(cl_envs[i].cec_count == 0,
807 list_empty(&cl_envs[i].cec_envs)));
808 write_unlock(&cl_envs[i].cec_guard);
812 EXPORT_SYMBOL(cl_env_cache_purge);
815 * Release an environment.
817 * Decrement \a env reference counter. When counter drops to 0, nothing in
818 * this thread is using environment and it is returned to the per-CPU cache or
819 * freed immediately if the cache is full.
821 void cl_env_put(struct lu_env *env, __u16 *refcheck)
825 cle = cl_env_container(env);
827 LASSERT(cle->ce_ref > 0);
828 LASSERT(ergo(refcheck != NULL, cle->ce_ref == *refcheck));
830 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
831 if (--cle->ce_ref == 0) {
835 cle->ce_debug = NULL;
838 * Don't bother to take a lock here.
840 * Return environment to the cache only when it was allocated
841 * with the standard tags.
843 if (cl_envs[cpu].cec_count < cl_envs_cached_max &&
844 (env->le_ctx.lc_tags & ~LCT_HAS_EXIT) == lu_context_tags_default &&
845 (env->le_ses->lc_tags & ~LCT_HAS_EXIT) == lu_session_tags_default) {
846 read_lock(&cl_envs[cpu].cec_guard);
847 list_add(&cle->ce_linkage, &cl_envs[cpu].cec_envs);
848 cl_envs[cpu].cec_count++;
849 read_unlock(&cl_envs[cpu].cec_guard);
855 EXPORT_SYMBOL(cl_env_put);
858 * Converts struct cl_attr to struct ost_lvb.
862 void cl_attr2lvb(struct ost_lvb *lvb, const struct cl_attr *attr)
864 lvb->lvb_size = attr->cat_size;
865 lvb->lvb_mtime = attr->cat_mtime;
866 lvb->lvb_atime = attr->cat_atime;
867 lvb->lvb_ctime = attr->cat_ctime;
868 lvb->lvb_blocks = attr->cat_blocks;
872 * Converts struct ost_lvb to struct cl_attr.
876 void cl_lvb2attr(struct cl_attr *attr, const struct ost_lvb *lvb)
878 attr->cat_size = lvb->lvb_size;
879 attr->cat_mtime = lvb->lvb_mtime;
880 attr->cat_atime = lvb->lvb_atime;
881 attr->cat_ctime = lvb->lvb_ctime;
882 attr->cat_blocks = lvb->lvb_blocks;
884 EXPORT_SYMBOL(cl_lvb2attr);
886 static struct cl_env cl_env_percpu[NR_CPUS];
887 static DEFINE_MUTEX(cl_env_percpu_mutex);
889 static int cl_env_percpu_init(void)
892 int tags = LCT_REMEMBER | LCT_NOREF;
896 for_each_possible_cpu(i) {
899 rwlock_init(&cl_envs[i].cec_guard);
900 INIT_LIST_HEAD(&cl_envs[i].cec_envs);
901 cl_envs[i].cec_count = 0;
903 cle = &cl_env_percpu[i];
906 INIT_LIST_HEAD(&cle->ce_linkage);
907 cle->ce_magic = &cl_env_init0;
908 rc = lu_env_init(env, LCT_CL_THREAD | tags);
910 rc = lu_context_init(&cle->ce_ses, LCT_SESSION | tags);
912 lu_context_enter(&cle->ce_ses);
913 env->le_ses = &cle->ce_ses;
922 /* Indices 0 to i (excluding i) were correctly initialized,
923 * thus we must uninitialize up to i, the rest are undefined. */
924 for (j = 0; j < i; j++) {
925 cle = &cl_env_percpu[j];
926 lu_context_exit(&cle->ce_ses);
927 lu_context_fini(&cle->ce_ses);
928 lu_env_fini(&cle->ce_lu);
935 static void cl_env_percpu_fini(void)
939 for_each_possible_cpu(i) {
940 struct cl_env *cle = &cl_env_percpu[i];
942 lu_context_exit(&cle->ce_ses);
943 lu_context_fini(&cle->ce_ses);
944 lu_env_fini(&cle->ce_lu);
948 static void cl_env_percpu_refill(void)
952 mutex_lock(&cl_env_percpu_mutex);
953 for_each_possible_cpu(i)
954 lu_env_refill(&cl_env_percpu[i].ce_lu);
955 mutex_unlock(&cl_env_percpu_mutex);
958 void cl_env_percpu_put(struct lu_env *env)
963 cpu = smp_processor_id();
964 cle = cl_env_container(env);
965 LASSERT(cle == &cl_env_percpu[cpu]);
968 LASSERT(cle->ce_ref == 0);
971 cle->ce_debug = NULL;
975 EXPORT_SYMBOL(cl_env_percpu_put);
977 struct lu_env *cl_env_percpu_get(void)
981 cle = &cl_env_percpu[get_cpu()];
982 cl_env_init0(cle, __builtin_return_address(0));
986 EXPORT_SYMBOL(cl_env_percpu_get);
988 /*****************************************************************************
990 * Temporary prototype thing: mirror obd-devices into cl devices.
994 struct cl_device *cl_type_setup(const struct lu_env *env, struct lu_site *site,
995 struct lu_device_type *ldt,
996 struct lu_device *next)
998 const char *typename;
1001 LASSERT(ldt != NULL);
1003 typename = ldt->ldt_name;
1004 d = ldt->ldt_ops->ldto_device_alloc(env, ldt, NULL);
1010 rc = ldt->ldt_ops->ldto_device_init(env, d, typename, next);
1013 lu_ref_add(&d->ld_reference,
1014 "lu-stack", &lu_site_init);
1016 ldt->ldt_ops->ldto_device_free(env, d);
1017 CERROR("can't init device '%s', %d\n", typename, rc);
1021 CERROR("Cannot allocate device: '%s'\n", typename);
1022 return lu2cl_dev(d);
1024 EXPORT_SYMBOL(cl_type_setup);
1027 * Finalize device stack by calling lu_stack_fini().
1029 void cl_stack_fini(const struct lu_env *env, struct cl_device *cl)
1031 lu_stack_fini(env, cl2lu_dev(cl));
1033 EXPORT_SYMBOL(cl_stack_fini);
1035 static struct lu_context_key cl_key;
1037 struct cl_thread_info *cl_env_info(const struct lu_env *env)
1039 return lu_context_key_get(&env->le_ctx, &cl_key);
1042 /* defines cl_key_{init,fini}() */
1043 LU_KEY_INIT_FINI(cl, struct cl_thread_info);
1045 static struct lu_context_key cl_key = {
1046 .lct_tags = LCT_CL_THREAD,
1047 .lct_init = cl_key_init,
1048 .lct_fini = cl_key_fini,
1051 static struct lu_kmem_descr cl_object_caches[] = {
1053 .ckd_cache = &cl_env_kmem,
1054 .ckd_name = "cl_env_kmem",
1055 .ckd_size = sizeof(struct cl_env)
1058 .ckd_cache = &cl_dio_aio_kmem,
1059 .ckd_name = "cl_dio_aio_kmem",
1060 .ckd_size = sizeof(struct cl_dio_aio)
1063 .ckd_cache = &cl_sub_dio_kmem,
1064 .ckd_name = "cl_sub_dio_kmem",
1065 .ckd_size = sizeof(struct cl_sub_dio)
1073 * Global initialization of cl-data. Create kmem caches, register
1074 * lu_context_key's, etc.
1076 * \see cl_global_fini()
1078 int cl_global_init(void)
1082 OBD_ALLOC_PTR_ARRAY(cl_envs, num_possible_cpus());
1083 if (cl_envs == NULL)
1084 GOTO(out, result = -ENOMEM);
1086 result = lu_kmem_init(cl_object_caches);
1088 GOTO(out_envs, result);
1090 LU_CONTEXT_KEY_INIT(&cl_key);
1091 result = lu_context_key_register(&cl_key);
1093 GOTO(out_kmem, result);
1095 result = cl_env_percpu_init();
1096 if (result) /* no cl_env_percpu_fini on error */
1097 GOTO(out_keys, result);
1102 lu_context_key_degister(&cl_key);
1104 lu_kmem_fini(cl_object_caches);
1106 OBD_FREE_PTR_ARRAY(cl_envs, num_possible_cpus());
1112 * Finalization of global cl-data. Dual to cl_global_init().
1114 void cl_global_fini(void)
1118 for (i = 0; i < ARRAY_SIZE(cl_page_kmem_array); i++) {
1119 if (cl_page_kmem_array[i]) {
1120 kmem_cache_destroy(cl_page_kmem_array[i]);
1121 cl_page_kmem_array[i] = NULL;
1124 cl_env_percpu_fini();
1125 lu_context_key_degister(&cl_key);
1126 lu_kmem_fini(cl_object_caches);
1127 OBD_FREE_PTR_ARRAY(cl_envs, num_possible_cpus());