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 * Mark the inode as dirty when the inode has uncommitted (unstable) pages.
257 * Thus when the system is under momory pressure, it will trigger writeback
258 * on background to commit and unpin the pages.
260 void cl_object_dirty_for_sync(const struct lu_env *env, struct cl_object *top)
262 struct cl_object *obj;
266 cl_object_for_each(obj, top) {
267 if (obj->co_ops->coo_dirty_for_sync != NULL)
268 obj->co_ops->coo_dirty_for_sync(env, obj);
272 EXPORT_SYMBOL(cl_object_dirty_for_sync);
275 * Notifies layers (bottom-to-top) that glimpse AST was received.
277 * Layers have to fill \a lvb fields with information that will be shipped
278 * back to glimpse issuer.
280 * \see cl_lock_operations::clo_glimpse()
282 int cl_object_glimpse(const struct lu_env *env, struct cl_object *top,
285 struct cl_object *obj;
289 cl_object_for_each_reverse(obj, top) {
290 if (obj->co_ops->coo_glimpse != NULL) {
291 result = obj->co_ops->coo_glimpse(env, obj, lvb);
296 LU_OBJECT_HEADER(D_DLMTRACE, env, lu_object_top(top->co_lu.lo_header),
297 "size: %llu mtime: %llu atime: %llu "
298 "ctime: %llu blocks: %llu\n",
299 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime,
300 lvb->lvb_ctime, lvb->lvb_blocks);
303 EXPORT_SYMBOL(cl_object_glimpse);
306 * Updates a configuration of an object \a obj.
308 int cl_conf_set(const struct lu_env *env, struct cl_object *top,
309 const struct cl_object_conf *conf)
311 struct cl_object *obj;
315 cl_object_for_each(obj, top) {
316 if (obj->co_ops->coo_conf_set != NULL) {
317 result = obj->co_ops->coo_conf_set(env, obj, conf);
324 EXPORT_SYMBOL(cl_conf_set);
327 * Prunes caches of pages and locks for this object.
329 int cl_object_prune(const struct lu_env *env, struct cl_object *top)
331 struct cl_object *obj;
335 cl_object_for_each(obj, top) {
336 if (obj->co_ops->coo_prune != NULL) {
337 result = obj->co_ops->coo_prune(env, obj);
345 EXPORT_SYMBOL(cl_object_prune);
348 * Get stripe information of this object.
350 int cl_object_getstripe(const struct lu_env *env, struct cl_object *top,
351 struct lov_user_md __user *uarg, size_t size)
353 struct cl_object *obj;
357 cl_object_for_each(obj, top) {
358 if (obj->co_ops->coo_getstripe) {
359 result = obj->co_ops->coo_getstripe(env, obj, uarg,
367 EXPORT_SYMBOL(cl_object_getstripe);
370 * Get fiemap extents from file object.
372 * \param env [in] lustre environment
373 * \param obj [in] file object
374 * \param key [in] fiemap request argument
375 * \param fiemap [out] fiemap extents mapping retrived
376 * \param buflen [in] max buffer length of @fiemap
381 int cl_object_fiemap(const struct lu_env *env, struct cl_object *top,
382 struct ll_fiemap_info_key *key,
383 struct fiemap *fiemap, size_t *buflen)
385 struct cl_object *obj;
389 cl_object_for_each(obj, top) {
390 if (obj->co_ops->coo_fiemap) {
391 result = obj->co_ops->coo_fiemap(env, obj, key, fiemap,
399 EXPORT_SYMBOL(cl_object_fiemap);
401 int cl_object_layout_get(const struct lu_env *env, struct cl_object *top,
402 struct cl_layout *cl)
404 struct cl_object *obj;
407 cl_object_for_each(obj, top) {
408 if (obj->co_ops->coo_layout_get)
409 return obj->co_ops->coo_layout_get(env, obj, cl);
414 EXPORT_SYMBOL(cl_object_layout_get);
416 loff_t cl_object_maxbytes(struct cl_object *top)
418 struct cl_object *obj;
419 loff_t maxbytes = LLONG_MAX;
422 cl_object_for_each(obj, top) {
423 if (obj->co_ops->coo_maxbytes)
424 maxbytes = min_t(loff_t, obj->co_ops->coo_maxbytes(obj),
430 EXPORT_SYMBOL(cl_object_maxbytes);
432 int cl_object_flush(const struct lu_env *env, struct cl_object *top,
433 struct ldlm_lock *lock)
435 struct cl_object *obj;
439 cl_object_for_each(obj, top) {
440 if (obj->co_ops->coo_object_flush) {
441 rc = obj->co_ops->coo_object_flush(env, obj, lock);
448 EXPORT_SYMBOL(cl_object_flush);
450 int cl_object_inode_ops(const struct lu_env *env, struct cl_object *top,
451 enum coo_inode_opc opc, void *data)
453 struct cl_object *obj;
458 cl_object_for_each(obj, top) {
459 if (obj->co_ops->coo_inode_ops) {
460 rc = obj->co_ops->coo_inode_ops(env, obj, opc, data);
467 EXPORT_SYMBOL(cl_object_inode_ops);
470 * Helper function removing all object locks, and marking object for
471 * deletion. All object pages must have been deleted at this point.
473 * This is called by cl_inode_fini() and lov_object_delete() to destroy top-
474 * and sub- objects respectively.
476 void cl_object_kill(const struct lu_env *env, struct cl_object *obj)
478 struct cl_object_header *hdr = cl_object_header(obj);
480 set_bit(LU_OBJECT_HEARD_BANSHEE, &hdr->coh_lu.loh_flags);
482 EXPORT_SYMBOL(cl_object_kill);
484 void cache_stats_init(struct cache_stats *cs, const char *name)
489 for (i = 0; i < CS_NR; i++)
490 atomic_set(&cs->cs_stats[i], 0);
493 static int cache_stats_print(const struct cache_stats *cs,
494 struct seq_file *m, int h)
499 * lookup hit total cached create
500 * env: ...... ...... ...... ...... ......
503 const char *names[CS_NR] = CS_NAMES;
505 seq_printf(m, "%6s", " ");
506 for (i = 0; i < CS_NR; i++)
507 seq_printf(m, "%8s", names[i]);
511 seq_printf(m, "%5.5s:", cs->cs_name);
512 for (i = 0; i < CS_NR; i++)
513 seq_printf(m, "%8u", atomic_read(&cs->cs_stats[i]));
517 static void cl_env_percpu_refill(void);
520 * Initialize client site.
522 * Perform common initialization (lu_site_init()), and initialize statistical
523 * counters. Also perform global initializations on the first call.
525 int cl_site_init(struct cl_site *s, struct cl_device *d)
530 result = lu_site_init(&s->cs_lu, &d->cd_lu_dev);
532 cache_stats_init(&s->cs_pages, "pages");
533 for (i = 0; i < ARRAY_SIZE(s->cs_pages_state); ++i)
534 atomic_set(&s->cs_pages_state[0], 0);
535 cl_env_percpu_refill();
539 EXPORT_SYMBOL(cl_site_init);
542 * Finalize client site. Dual to cl_site_init().
544 void cl_site_fini(struct cl_site *s)
546 lu_site_fini(&s->cs_lu);
548 EXPORT_SYMBOL(cl_site_fini);
550 static struct cache_stats cl_env_stats = {
552 .cs_stats = { ATOMIC_INIT(0), }
556 * Outputs client site statistical counters into a buffer. Suitable for
557 * ll_rd_*()-style functions.
559 int cl_site_stats_print(const struct cl_site *site, struct seq_file *m)
561 static const char *const pstate[] = {
571 lookup hit total busy create
572 pages: ...... ...... ...... ...... ...... [...... ...... ...... ......]
573 locks: ...... ...... ...... ...... ...... [...... ...... ...... ...... ......]
574 env: ...... ...... ...... ...... ......
576 lu_site_stats_seq_print(&site->cs_lu, m);
577 cache_stats_print(&site->cs_pages, m, 1);
579 for (i = 0; i < ARRAY_SIZE(site->cs_pages_state); ++i)
580 seq_printf(m, "%s: %u ", pstate[i],
581 atomic_read(&site->cs_pages_state[i]));
582 seq_printf(m, "]\n");
583 cache_stats_print(&cl_env_stats, m, 0);
587 EXPORT_SYMBOL(cl_site_stats_print);
589 /*****************************************************************************
591 * lu_env handling on client.
595 static unsigned cl_envs_cached_max = 32; /* XXX: prototype: arbitrary limit
597 static struct cl_env_cache {
600 struct list_head cec_envs;
606 struct lu_context ce_ses;
609 * Linkage into global list of all client environments. Used for
610 * garbage collection.
612 struct list_head ce_linkage;
618 * Debugging field: address of the caller who made original
624 static void cl_env_inc(enum cache_stats_item item)
626 #ifdef CONFIG_DEBUG_PAGESTATE_TRACKING
627 atomic_inc(&cl_env_stats.cs_stats[item]);
631 static void cl_env_dec(enum cache_stats_item item)
633 #ifdef CONFIG_DEBUG_PAGESTATE_TRACKING
634 LASSERT(atomic_read(&cl_env_stats.cs_stats[item]) > 0);
635 atomic_dec(&cl_env_stats.cs_stats[item]);
639 static void cl_env_init0(struct cl_env *cle, void *debug)
641 LASSERT(cle->ce_ref == 0);
642 LASSERT(cle->ce_magic == &cl_env_init0);
643 LASSERT(cle->ce_debug == NULL);
646 cle->ce_debug = debug;
650 static struct lu_env *cl_env_new(__u32 ctx_tags, __u32 ses_tags, void *debug)
655 OBD_SLAB_ALLOC_PTR_GFP(cle, cl_env_kmem, GFP_NOFS);
659 INIT_LIST_HEAD(&cle->ce_linkage);
660 cle->ce_magic = &cl_env_init0;
662 rc = lu_env_init(env, LCT_CL_THREAD|ctx_tags);
664 rc = lu_context_init(&cle->ce_ses,
665 LCT_SESSION | ses_tags);
667 lu_context_enter(&cle->ce_ses);
668 env->le_ses = &cle->ce_ses;
669 cl_env_init0(cle, debug);
674 OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
677 cl_env_inc(CS_create);
678 cl_env_inc(CS_total);
681 env = ERR_PTR(-ENOMEM);
685 static void cl_env_fini(struct cl_env *cle)
687 cl_env_dec(CS_total);
688 lu_context_fini(&cle->ce_lu.le_ctx);
689 lu_context_fini(&cle->ce_ses);
690 OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
693 /* Get a cl_env, either from the per-CPU cache for the current CPU, or by
694 * allocating a new one.
696 static struct lu_env *cl_env_obtain(void *debug)
704 read_lock(&cl_envs[cpu].cec_guard);
705 LASSERT(equi(cl_envs[cpu].cec_count == 0,
706 list_empty(&cl_envs[cpu].cec_envs)));
707 if (cl_envs[cpu].cec_count > 0) {
710 cle = container_of(cl_envs[cpu].cec_envs.next, struct cl_env,
712 list_del_init(&cle->ce_linkage);
713 cl_envs[cpu].cec_count--;
714 read_unlock(&cl_envs[cpu].cec_guard);
718 rc = lu_env_refill(env);
720 cl_env_init0(cle, debug);
721 lu_context_enter(&env->le_ctx);
722 lu_context_enter(&cle->ce_ses);
728 read_unlock(&cl_envs[cpu].cec_guard);
730 env = cl_env_new(lu_context_tags_default,
731 lu_session_tags_default, debug);
736 static inline struct cl_env *cl_env_container(struct lu_env *env)
738 return container_of(env, struct cl_env, ce_lu);
744 * No link to thread, this returns an env from the cache or
745 * allocates a new one.
747 * If you need to get the specific environment you created for this thread,
748 * you must either pass the pointer directly or store it in the file/inode
749 * private data and retrieve it from there using ll_cl_add/ll_cl_find.
751 * \param refcheck pointer to a counter used to detect environment leaks. In
752 * the usual case cl_env_get() and cl_env_put() are called in the same lexical
753 * scope and pointer to the same integer is passed as \a refcheck. This is
754 * used to detect missed cl_env_put().
758 struct lu_env *cl_env_get(__u16 *refcheck)
762 env = cl_env_obtain(__builtin_return_address(0));
766 cle = cl_env_container(env);
767 *refcheck = cle->ce_ref;
768 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
772 EXPORT_SYMBOL(cl_env_get);
775 * Forces an allocation of a fresh environment with given tags.
779 struct lu_env *cl_env_alloc(__u16 *refcheck, __u32 tags)
783 env = cl_env_new(tags, tags, __builtin_return_address(0));
787 cle = cl_env_container(env);
788 *refcheck = cle->ce_ref;
789 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
793 EXPORT_SYMBOL(cl_env_alloc);
795 static void cl_env_exit(struct cl_env *cle)
797 lu_context_exit(&cle->ce_lu.le_ctx);
798 lu_context_exit(&cle->ce_ses);
802 * Finalizes and frees a given number of cached environments. This is done to
803 * (1) free some memory (not currently hooked into VM), or (2) release
804 * references to modules.
806 unsigned cl_env_cache_purge(unsigned nr)
812 for_each_possible_cpu(i) {
813 write_lock(&cl_envs[i].cec_guard);
814 for (; !list_empty(&cl_envs[i].cec_envs) && nr > 0; --nr) {
815 cle = container_of(cl_envs[i].cec_envs.next,
816 struct cl_env, ce_linkage);
817 list_del_init(&cle->ce_linkage);
818 LASSERT(cl_envs[i].cec_count > 0);
819 cl_envs[i].cec_count--;
820 write_unlock(&cl_envs[i].cec_guard);
823 write_lock(&cl_envs[i].cec_guard);
825 LASSERT(equi(cl_envs[i].cec_count == 0,
826 list_empty(&cl_envs[i].cec_envs)));
827 write_unlock(&cl_envs[i].cec_guard);
831 EXPORT_SYMBOL(cl_env_cache_purge);
834 * Release an environment.
836 * Decrement \a env reference counter. When counter drops to 0, nothing in
837 * this thread is using environment and it is returned to the per-CPU cache or
838 * freed immediately if the cache is full.
840 void cl_env_put(struct lu_env *env, __u16 *refcheck)
844 cle = cl_env_container(env);
846 LASSERT(cle->ce_ref > 0);
847 LASSERT(ergo(refcheck != NULL, cle->ce_ref == *refcheck));
849 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
850 if (--cle->ce_ref == 0) {
854 cle->ce_debug = NULL;
857 * Don't bother to take a lock here.
859 * Return environment to the cache only when it was allocated
860 * with the standard tags.
862 if (cl_envs[cpu].cec_count < cl_envs_cached_max &&
863 (env->le_ctx.lc_tags & ~LCT_HAS_EXIT) == lu_context_tags_default &&
864 (env->le_ses->lc_tags & ~LCT_HAS_EXIT) == lu_session_tags_default) {
865 read_lock(&cl_envs[cpu].cec_guard);
866 list_add(&cle->ce_linkage, &cl_envs[cpu].cec_envs);
867 cl_envs[cpu].cec_count++;
868 read_unlock(&cl_envs[cpu].cec_guard);
874 EXPORT_SYMBOL(cl_env_put);
877 * Converts struct cl_attr to struct ost_lvb.
881 void cl_attr2lvb(struct ost_lvb *lvb, const struct cl_attr *attr)
883 lvb->lvb_size = attr->cat_size;
884 lvb->lvb_mtime = attr->cat_mtime;
885 lvb->lvb_atime = attr->cat_atime;
886 lvb->lvb_ctime = attr->cat_ctime;
887 lvb->lvb_blocks = attr->cat_blocks;
891 * Converts struct ost_lvb to struct cl_attr.
895 void cl_lvb2attr(struct cl_attr *attr, const struct ost_lvb *lvb)
897 attr->cat_size = lvb->lvb_size;
898 attr->cat_mtime = lvb->lvb_mtime;
899 attr->cat_atime = lvb->lvb_atime;
900 attr->cat_ctime = lvb->lvb_ctime;
901 attr->cat_blocks = lvb->lvb_blocks;
903 EXPORT_SYMBOL(cl_lvb2attr);
905 static struct cl_env cl_env_percpu[NR_CPUS];
906 static DEFINE_MUTEX(cl_env_percpu_mutex);
908 static int cl_env_percpu_init(void)
911 int tags = LCT_REMEMBER | LCT_NOREF;
915 for_each_possible_cpu(i) {
918 rwlock_init(&cl_envs[i].cec_guard);
919 INIT_LIST_HEAD(&cl_envs[i].cec_envs);
920 cl_envs[i].cec_count = 0;
922 cle = &cl_env_percpu[i];
925 INIT_LIST_HEAD(&cle->ce_linkage);
926 cle->ce_magic = &cl_env_init0;
927 rc = lu_env_init(env, LCT_CL_THREAD | tags);
929 rc = lu_context_init(&cle->ce_ses, LCT_SESSION | tags);
931 lu_context_enter(&cle->ce_ses);
932 env->le_ses = &cle->ce_ses;
941 /* Indices 0 to i (excluding i) were correctly initialized,
942 * thus we must uninitialize up to i, the rest are undefined. */
943 for (j = 0; j < i; j++) {
944 cle = &cl_env_percpu[j];
945 lu_context_exit(&cle->ce_ses);
946 lu_context_fini(&cle->ce_ses);
947 lu_env_fini(&cle->ce_lu);
954 static void cl_env_percpu_fini(void)
958 for_each_possible_cpu(i) {
959 struct cl_env *cle = &cl_env_percpu[i];
961 lu_context_exit(&cle->ce_ses);
962 lu_context_fini(&cle->ce_ses);
963 lu_env_fini(&cle->ce_lu);
967 static void cl_env_percpu_refill(void)
971 mutex_lock(&cl_env_percpu_mutex);
972 for_each_possible_cpu(i)
973 lu_env_refill(&cl_env_percpu[i].ce_lu);
974 mutex_unlock(&cl_env_percpu_mutex);
977 void cl_env_percpu_put(struct lu_env *env)
982 cpu = smp_processor_id();
983 cle = cl_env_container(env);
984 LASSERT(cle == &cl_env_percpu[cpu]);
987 LASSERT(cle->ce_ref == 0);
990 cle->ce_debug = NULL;
994 EXPORT_SYMBOL(cl_env_percpu_put);
996 struct lu_env *cl_env_percpu_get(void)
1000 cle = &cl_env_percpu[get_cpu()];
1001 cl_env_init0(cle, __builtin_return_address(0));
1005 EXPORT_SYMBOL(cl_env_percpu_get);
1007 /*****************************************************************************
1009 * Temporary prototype thing: mirror obd-devices into cl devices.
1013 struct cl_device *cl_type_setup(const struct lu_env *env, struct lu_site *site,
1014 struct lu_device_type *ldt,
1015 struct lu_device *next)
1017 const char *typename;
1018 struct lu_device *d;
1020 LASSERT(ldt != NULL);
1022 typename = ldt->ldt_name;
1023 d = ldt->ldt_ops->ldto_device_alloc(env, ldt, NULL);
1029 rc = ldt->ldt_ops->ldto_device_init(env, d, typename, next);
1032 lu_ref_add(&d->ld_reference,
1033 "lu-stack", &lu_site_init);
1035 ldt->ldt_ops->ldto_device_free(env, d);
1036 CERROR("can't init device '%s', %d\n", typename, rc);
1040 CERROR("Cannot allocate device: '%s'\n", typename);
1041 return lu2cl_dev(d);
1043 EXPORT_SYMBOL(cl_type_setup);
1046 * Finalize device stack by calling lu_stack_fini().
1048 void cl_stack_fini(const struct lu_env *env, struct cl_device *cl)
1050 lu_stack_fini(env, cl2lu_dev(cl));
1052 EXPORT_SYMBOL(cl_stack_fini);
1054 static struct lu_context_key cl_key;
1056 struct cl_thread_info *cl_env_info(const struct lu_env *env)
1058 return lu_context_key_get(&env->le_ctx, &cl_key);
1061 /* defines cl_key_{init,fini}() */
1062 LU_KEY_INIT_FINI(cl, struct cl_thread_info);
1064 static struct lu_context_key cl_key = {
1065 .lct_tags = LCT_CL_THREAD,
1066 .lct_init = cl_key_init,
1067 .lct_fini = cl_key_fini,
1070 static struct lu_kmem_descr cl_object_caches[] = {
1072 .ckd_cache = &cl_env_kmem,
1073 .ckd_name = "cl_env_kmem",
1074 .ckd_size = sizeof(struct cl_env)
1077 .ckd_cache = &cl_dio_aio_kmem,
1078 .ckd_name = "cl_dio_aio_kmem",
1079 .ckd_size = sizeof(struct cl_dio_aio)
1082 .ckd_cache = &cl_sub_dio_kmem,
1083 .ckd_name = "cl_sub_dio_kmem",
1084 .ckd_size = sizeof(struct cl_sub_dio)
1092 * Global initialization of cl-data. Create kmem caches, register
1093 * lu_context_key's, etc.
1095 * \see cl_global_fini()
1097 int cl_global_init(void)
1101 OBD_ALLOC_PTR_ARRAY(cl_envs, num_possible_cpus());
1102 if (cl_envs == NULL)
1103 GOTO(out, result = -ENOMEM);
1105 result = lu_kmem_init(cl_object_caches);
1107 GOTO(out_envs, result);
1109 LU_CONTEXT_KEY_INIT(&cl_key);
1110 result = lu_context_key_register(&cl_key);
1112 GOTO(out_kmem, result);
1114 result = cl_env_percpu_init();
1115 if (result) /* no cl_env_percpu_fini on error */
1116 GOTO(out_keys, result);
1121 lu_context_key_degister(&cl_key);
1123 lu_kmem_fini(cl_object_caches);
1125 OBD_FREE_PTR_ARRAY(cl_envs, num_possible_cpus());
1131 * Finalization of global cl-data. Dual to cl_global_init().
1133 void cl_global_fini(void)
1137 for (i = 0; i < ARRAY_SIZE(cl_page_kmem_array); i++) {
1138 if (cl_page_kmem_array[i]) {
1139 kmem_cache_destroy(cl_page_kmem_array[i]);
1140 cl_page_kmem_array[i] = NULL;
1143 cl_env_percpu_fini();
1144 lu_context_key_degister(&cl_key);
1145 lu_kmem_fini(cl_object_caches);
1146 OBD_FREE_PTR_ARRAY(cl_envs, num_possible_cpus());