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/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * Client Lustre Object.
34 * Author: Nikita Danilov <nikita.danilov@sun.com>
35 * Author: Jinshan Xiong <jinshan.xiong@intel.com>
47 #define DEBUG_SUBSYSTEM S_CLASS
49 #include <linux/list.h>
50 #include <libcfs/libcfs.h>
51 #include <obd_class.h>
52 #include <obd_support.h>
53 #include <lustre_fid.h>
54 #include <libcfs/libcfs_hash.h> /* for cfs_hash stuff */
55 #include <cl_object.h>
56 #include <lu_object.h>
57 #include "cl_internal.h"
59 static struct kmem_cache *cl_env_kmem;
60 struct kmem_cache *cl_dio_aio_kmem;
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 *obj,
201 struct cl_attr *attr)
203 struct lu_object_header *top;
206 assert_spin_locked(cl_object_attr_guard(obj));
209 top = obj->co_lu.lo_header;
211 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
212 if (obj->co_ops->coo_attr_get != NULL) {
213 result = obj->co_ops->coo_attr_get(env, obj, attr);
223 EXPORT_SYMBOL(cl_object_attr_get);
226 * Updates data-attributes of an object \a obj.
228 * Only attributes, mentioned in a validness bit-mask \a v are
229 * updated. Calls cl_object_operations::coo_upd_attr() on every layer, bottom
232 int cl_object_attr_update(const struct lu_env *env, struct cl_object *obj,
233 const struct cl_attr *attr, unsigned v)
235 struct lu_object_header *top;
238 assert_spin_locked(cl_object_attr_guard(obj));
241 top = obj->co_lu.lo_header;
243 list_for_each_entry_reverse(obj, &top->loh_layers, co_lu.lo_linkage) {
244 if (obj->co_ops->coo_attr_update != NULL) {
245 result = obj->co_ops->coo_attr_update(env, obj, attr,
256 EXPORT_SYMBOL(cl_object_attr_update);
259 * Notifies layers (bottom-to-top) that glimpse AST was received.
261 * Layers have to fill \a lvb fields with information that will be shipped
262 * back to glimpse issuer.
264 * \see cl_lock_operations::clo_glimpse()
266 int cl_object_glimpse(const struct lu_env *env, struct cl_object *obj,
269 struct lu_object_header *top;
273 top = obj->co_lu.lo_header;
275 list_for_each_entry_reverse(obj, &top->loh_layers, co_lu.lo_linkage) {
276 if (obj->co_ops->coo_glimpse != NULL) {
277 result = obj->co_ops->coo_glimpse(env, obj, lvb);
282 LU_OBJECT_HEADER(D_DLMTRACE, env, lu_object_top(top),
283 "size: %llu mtime: %llu atime: %llu "
284 "ctime: %llu blocks: %llu\n",
285 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime,
286 lvb->lvb_ctime, lvb->lvb_blocks);
289 EXPORT_SYMBOL(cl_object_glimpse);
292 * Updates a configuration of an object \a obj.
294 int cl_conf_set(const struct lu_env *env, struct cl_object *obj,
295 const struct cl_object_conf *conf)
297 struct lu_object_header *top;
301 top = obj->co_lu.lo_header;
303 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
304 if (obj->co_ops->coo_conf_set != NULL) {
305 result = obj->co_ops->coo_conf_set(env, obj, conf);
312 EXPORT_SYMBOL(cl_conf_set);
315 * Prunes caches of pages and locks for this object.
317 int cl_object_prune(const struct lu_env *env, struct cl_object *obj)
319 struct lu_object_header *top;
324 top = obj->co_lu.lo_header;
326 list_for_each_entry(o, &top->loh_layers, co_lu.lo_linkage) {
327 if (o->co_ops->coo_prune != NULL) {
328 result = o->co_ops->coo_prune(env, o);
336 EXPORT_SYMBOL(cl_object_prune);
339 * Get stripe information of this object.
341 int cl_object_getstripe(const struct lu_env *env, struct cl_object *obj,
342 struct lov_user_md __user *uarg, size_t size)
344 struct lu_object_header *top;
348 top = obj->co_lu.lo_header;
349 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
350 if (obj->co_ops->coo_getstripe != NULL) {
351 result = obj->co_ops->coo_getstripe(env, obj, uarg,
359 EXPORT_SYMBOL(cl_object_getstripe);
362 * Get fiemap extents from file object.
364 * \param env [in] lustre environment
365 * \param obj [in] file object
366 * \param key [in] fiemap request argument
367 * \param fiemap [out] fiemap extents mapping retrived
368 * \param buflen [in] max buffer length of @fiemap
373 int cl_object_fiemap(const struct lu_env *env, struct cl_object *obj,
374 struct ll_fiemap_info_key *key,
375 struct fiemap *fiemap, size_t *buflen)
377 struct lu_object_header *top;
381 top = obj->co_lu.lo_header;
382 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
383 if (obj->co_ops->coo_fiemap != NULL) {
384 result = obj->co_ops->coo_fiemap(env, obj, key, fiemap,
392 EXPORT_SYMBOL(cl_object_fiemap);
394 int cl_object_layout_get(const struct lu_env *env, struct cl_object *obj,
395 struct cl_layout *cl)
397 struct lu_object_header *top = obj->co_lu.lo_header;
400 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
401 if (obj->co_ops->coo_layout_get != NULL)
402 return obj->co_ops->coo_layout_get(env, obj, cl);
407 EXPORT_SYMBOL(cl_object_layout_get);
409 loff_t cl_object_maxbytes(struct cl_object *obj)
411 struct lu_object_header *top = obj->co_lu.lo_header;
412 loff_t maxbytes = LLONG_MAX;
415 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
416 if (obj->co_ops->coo_maxbytes != NULL)
417 maxbytes = min_t(loff_t, obj->co_ops->coo_maxbytes(obj),
423 EXPORT_SYMBOL(cl_object_maxbytes);
425 int cl_object_flush(const struct lu_env *env, struct cl_object *obj,
426 struct ldlm_lock *lock)
428 struct lu_object_header *top = obj->co_lu.lo_header;
432 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
433 if (obj->co_ops->coo_object_flush) {
434 rc = obj->co_ops->coo_object_flush(env, obj, lock);
441 EXPORT_SYMBOL(cl_object_flush);
444 * Helper function removing all object locks, and marking object for
445 * deletion. All object pages must have been deleted at this point.
447 * This is called by cl_inode_fini() and lov_object_delete() to destroy top-
448 * and sub- objects respectively.
450 void cl_object_kill(const struct lu_env *env, struct cl_object *obj)
452 struct cl_object_header *hdr = cl_object_header(obj);
454 set_bit(LU_OBJECT_HEARD_BANSHEE, &hdr->coh_lu.loh_flags);
456 EXPORT_SYMBOL(cl_object_kill);
458 void cache_stats_init(struct cache_stats *cs, const char *name)
463 for (i = 0; i < CS_NR; i++)
464 atomic_set(&cs->cs_stats[i], 0);
467 static int cache_stats_print(const struct cache_stats *cs,
468 struct seq_file *m, int h)
473 * lookup hit total cached create
474 * env: ...... ...... ...... ...... ......
477 const char *names[CS_NR] = CS_NAMES;
479 seq_printf(m, "%6s", " ");
480 for (i = 0; i < CS_NR; i++)
481 seq_printf(m, "%8s", names[i]);
485 seq_printf(m, "%5.5s:", cs->cs_name);
486 for (i = 0; i < CS_NR; i++)
487 seq_printf(m, "%8u", atomic_read(&cs->cs_stats[i]));
491 static void cl_env_percpu_refill(void);
494 * Initialize client site.
496 * Perform common initialization (lu_site_init()), and initialize statistical
497 * counters. Also perform global initializations on the first call.
499 int cl_site_init(struct cl_site *s, struct cl_device *d)
504 result = lu_site_init(&s->cs_lu, &d->cd_lu_dev);
506 cache_stats_init(&s->cs_pages, "pages");
507 for (i = 0; i < ARRAY_SIZE(s->cs_pages_state); ++i)
508 atomic_set(&s->cs_pages_state[0], 0);
509 cl_env_percpu_refill();
513 EXPORT_SYMBOL(cl_site_init);
516 * Finalize client site. Dual to cl_site_init().
518 void cl_site_fini(struct cl_site *s)
520 lu_site_fini(&s->cs_lu);
522 EXPORT_SYMBOL(cl_site_fini);
524 static struct cache_stats cl_env_stats = {
526 .cs_stats = { ATOMIC_INIT(0), }
530 * Outputs client site statistical counters into a buffer. Suitable for
531 * ll_rd_*()-style functions.
533 int cl_site_stats_print(const struct cl_site *site, struct seq_file *m)
535 static const char *pstate[] = {
545 lookup hit total busy create
546 pages: ...... ...... ...... ...... ...... [...... ...... ...... ......]
547 locks: ...... ...... ...... ...... ...... [...... ...... ...... ...... ......]
548 env: ...... ...... ...... ...... ......
550 lu_site_stats_seq_print(&site->cs_lu, m);
551 cache_stats_print(&site->cs_pages, m, 1);
553 for (i = 0; i < ARRAY_SIZE(site->cs_pages_state); ++i)
554 seq_printf(m, "%s: %u ", pstate[i],
555 atomic_read(&site->cs_pages_state[i]));
556 seq_printf(m, "]\n");
557 cache_stats_print(&cl_env_stats, m, 0);
561 EXPORT_SYMBOL(cl_site_stats_print);
563 /*****************************************************************************
565 * lu_env handling on client.
570 * The most efficient way is to store cl_env pointer in task specific
571 * structures. On Linux, it isn't easy to use task_struct->journal_info
572 * because Lustre code may call into other fs during memory reclaim, which
573 * has certain assumptions about journal_info. There are not currently any
574 * fields in task_struct that can be used for this purpose.
575 * \note As long as we use task_struct to store cl_env, we assume that once
576 * called into Lustre, we'll never call into the other part of the kernel
577 * which will use those fields in task_struct without explicitly exiting
580 * Since there's no space in task_struct is available, hash will be used.
584 static unsigned cl_envs_cached_max = 32; /* XXX: prototype: arbitrary limit
586 static struct cl_env_cache {
589 struct list_head cec_envs;
595 struct lu_context ce_ses;
598 * Linkage into global list of all client environments. Used for
599 * garbage collection.
601 struct list_head ce_linkage;
607 * Debugging field: address of the caller who made original
613 static void cl_env_inc(enum cache_stats_item item)
615 #ifdef CONFIG_DEBUG_PAGESTATE_TRACKING
616 atomic_inc(&cl_env_stats.cs_stats[item]);
620 static void cl_env_dec(enum cache_stats_item item)
622 #ifdef CONFIG_DEBUG_PAGESTATE_TRACKING
623 LASSERT(atomic_read(&cl_env_stats.cs_stats[item]) > 0);
624 atomic_dec(&cl_env_stats.cs_stats[item]);
628 static void cl_env_init0(struct cl_env *cle, void *debug)
630 LASSERT(cle->ce_ref == 0);
631 LASSERT(cle->ce_magic == &cl_env_init0);
632 LASSERT(cle->ce_debug == NULL);
635 cle->ce_debug = debug;
639 static struct lu_env *cl_env_new(__u32 ctx_tags, __u32 ses_tags, void *debug)
644 OBD_SLAB_ALLOC_PTR_GFP(cle, cl_env_kmem, GFP_NOFS);
648 INIT_LIST_HEAD(&cle->ce_linkage);
649 cle->ce_magic = &cl_env_init0;
651 rc = lu_env_init(env, LCT_CL_THREAD|ctx_tags);
653 rc = lu_context_init(&cle->ce_ses,
654 LCT_SESSION | ses_tags);
656 lu_context_enter(&cle->ce_ses);
657 env->le_ses = &cle->ce_ses;
658 cl_env_init0(cle, debug);
663 OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
666 cl_env_inc(CS_create);
667 cl_env_inc(CS_total);
670 env = ERR_PTR(-ENOMEM);
674 static void cl_env_fini(struct cl_env *cle)
676 cl_env_dec(CS_total);
677 lu_context_fini(&cle->ce_lu.le_ctx);
678 lu_context_fini(&cle->ce_ses);
679 OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
682 static struct lu_env *cl_env_obtain(void *debug)
690 read_lock(&cl_envs[cpu].cec_guard);
691 LASSERT(equi(cl_envs[cpu].cec_count == 0,
692 list_empty(&cl_envs[cpu].cec_envs)));
693 if (cl_envs[cpu].cec_count > 0) {
696 cle = container_of(cl_envs[cpu].cec_envs.next, struct cl_env,
698 list_del_init(&cle->ce_linkage);
699 cl_envs[cpu].cec_count--;
700 read_unlock(&cl_envs[cpu].cec_guard);
704 rc = lu_env_refill(env);
706 cl_env_init0(cle, debug);
707 lu_context_enter(&env->le_ctx);
708 lu_context_enter(&cle->ce_ses);
714 read_unlock(&cl_envs[cpu].cec_guard);
716 env = cl_env_new(lu_context_tags_default,
717 lu_session_tags_default, debug);
722 static inline struct cl_env *cl_env_container(struct lu_env *env)
724 return container_of(env, struct cl_env, ce_lu);
728 * Returns lu_env: if there already is an environment associated with the
729 * current thread, it is returned, otherwise, new environment is allocated.
731 * Allocations are amortized through the global cache of environments.
733 * \param refcheck pointer to a counter used to detect environment leaks. In
734 * the usual case cl_env_get() and cl_env_put() are called in the same lexical
735 * scope and pointer to the same integer is passed as \a refcheck. This is
736 * used to detect missed cl_env_put().
740 struct lu_env *cl_env_get(__u16 *refcheck)
744 env = cl_env_obtain(__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_get);
757 * Forces an allocation of a fresh environment with given tags.
761 struct lu_env *cl_env_alloc(__u16 *refcheck, __u32 tags)
765 env = cl_env_new(tags, tags, __builtin_return_address(0));
769 cle = cl_env_container(env);
770 *refcheck = cle->ce_ref;
771 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
775 EXPORT_SYMBOL(cl_env_alloc);
777 static void cl_env_exit(struct cl_env *cle)
779 lu_context_exit(&cle->ce_lu.le_ctx);
780 lu_context_exit(&cle->ce_ses);
784 * Finalizes and frees a given number of cached environments. This is done to
785 * (1) free some memory (not currently hooked into VM), or (2) release
786 * references to modules.
788 unsigned cl_env_cache_purge(unsigned nr)
794 for_each_possible_cpu(i) {
795 write_lock(&cl_envs[i].cec_guard);
796 for (; !list_empty(&cl_envs[i].cec_envs) && nr > 0; --nr) {
797 cle = container_of(cl_envs[i].cec_envs.next,
798 struct cl_env, ce_linkage);
799 list_del_init(&cle->ce_linkage);
800 LASSERT(cl_envs[i].cec_count > 0);
801 cl_envs[i].cec_count--;
802 write_unlock(&cl_envs[i].cec_guard);
805 write_lock(&cl_envs[i].cec_guard);
807 LASSERT(equi(cl_envs[i].cec_count == 0,
808 list_empty(&cl_envs[i].cec_envs)));
809 write_unlock(&cl_envs[i].cec_guard);
813 EXPORT_SYMBOL(cl_env_cache_purge);
816 * Release an environment.
818 * Decrement \a env reference counter. When counter drops to 0, nothing in
819 * this thread is using environment and it is returned to the allocation
820 * cache, or freed straight away, if cache is large enough.
822 void cl_env_put(struct lu_env *env, __u16 *refcheck)
826 cle = cl_env_container(env);
828 LASSERT(cle->ce_ref > 0);
829 LASSERT(ergo(refcheck != NULL, cle->ce_ref == *refcheck));
831 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
832 if (--cle->ce_ref == 0) {
836 cle->ce_debug = NULL;
839 * Don't bother to take a lock here.
841 * Return environment to the cache only when it was allocated
842 * with the standard tags.
844 if (cl_envs[cpu].cec_count < cl_envs_cached_max &&
845 (env->le_ctx.lc_tags & ~LCT_HAS_EXIT) == lu_context_tags_default &&
846 (env->le_ses->lc_tags & ~LCT_HAS_EXIT) == lu_session_tags_default) {
847 read_lock(&cl_envs[cpu].cec_guard);
848 list_add(&cle->ce_linkage, &cl_envs[cpu].cec_envs);
849 cl_envs[cpu].cec_count++;
850 read_unlock(&cl_envs[cpu].cec_guard);
856 EXPORT_SYMBOL(cl_env_put);
859 * Converts struct cl_attr to struct ost_lvb.
863 void cl_attr2lvb(struct ost_lvb *lvb, const struct cl_attr *attr)
865 lvb->lvb_size = attr->cat_size;
866 lvb->lvb_mtime = attr->cat_mtime;
867 lvb->lvb_atime = attr->cat_atime;
868 lvb->lvb_ctime = attr->cat_ctime;
869 lvb->lvb_blocks = attr->cat_blocks;
873 * Converts struct ost_lvb to struct cl_attr.
877 void cl_lvb2attr(struct cl_attr *attr, const struct ost_lvb *lvb)
879 attr->cat_size = lvb->lvb_size;
880 attr->cat_mtime = lvb->lvb_mtime;
881 attr->cat_atime = lvb->lvb_atime;
882 attr->cat_ctime = lvb->lvb_ctime;
883 attr->cat_blocks = lvb->lvb_blocks;
885 EXPORT_SYMBOL(cl_lvb2attr);
887 static struct cl_env cl_env_percpu[NR_CPUS];
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 for_each_possible_cpu(i)
953 lu_env_refill(&cl_env_percpu[i].ce_lu);
956 void cl_env_percpu_put(struct lu_env *env)
961 cpu = smp_processor_id();
962 cle = cl_env_container(env);
963 LASSERT(cle == &cl_env_percpu[cpu]);
966 LASSERT(cle->ce_ref == 0);
969 cle->ce_debug = NULL;
973 EXPORT_SYMBOL(cl_env_percpu_put);
975 struct lu_env *cl_env_percpu_get(void)
979 cle = &cl_env_percpu[get_cpu()];
980 cl_env_init0(cle, __builtin_return_address(0));
984 EXPORT_SYMBOL(cl_env_percpu_get);
986 /*****************************************************************************
988 * Temporary prototype thing: mirror obd-devices into cl devices.
992 struct cl_device *cl_type_setup(const struct lu_env *env, struct lu_site *site,
993 struct lu_device_type *ldt,
994 struct lu_device *next)
996 const char *typename;
999 LASSERT(ldt != NULL);
1001 typename = ldt->ldt_name;
1002 d = ldt->ldt_ops->ldto_device_alloc(env, ldt, NULL);
1008 rc = ldt->ldt_ops->ldto_device_init(env, d, typename, next);
1011 lu_ref_add(&d->ld_reference,
1012 "lu-stack", &lu_site_init);
1014 ldt->ldt_ops->ldto_device_free(env, d);
1015 CERROR("can't init device '%s', %d\n", typename, rc);
1019 CERROR("Cannot allocate device: '%s'\n", typename);
1020 return lu2cl_dev(d);
1022 EXPORT_SYMBOL(cl_type_setup);
1025 * Finalize device stack by calling lu_stack_fini().
1027 void cl_stack_fini(const struct lu_env *env, struct cl_device *cl)
1029 lu_stack_fini(env, cl2lu_dev(cl));
1031 EXPORT_SYMBOL(cl_stack_fini);
1033 static struct lu_context_key cl_key;
1035 struct cl_thread_info *cl_env_info(const struct lu_env *env)
1037 return lu_context_key_get(&env->le_ctx, &cl_key);
1040 /* defines cl_key_{init,fini}() */
1041 LU_KEY_INIT_FINI(cl, struct cl_thread_info);
1043 static struct lu_context_key cl_key = {
1044 .lct_tags = LCT_CL_THREAD,
1045 .lct_init = cl_key_init,
1046 .lct_fini = cl_key_fini,
1049 static struct lu_kmem_descr cl_object_caches[] = {
1051 .ckd_cache = &cl_env_kmem,
1052 .ckd_name = "cl_env_kmem",
1053 .ckd_size = sizeof(struct cl_env)
1056 .ckd_cache = &cl_dio_aio_kmem,
1057 .ckd_name = "cl_dio_aio_kmem",
1058 .ckd_size = sizeof(struct cl_dio_aio)
1066 * Global initialization of cl-data. Create kmem caches, register
1067 * lu_context_key's, etc.
1069 * \see cl_global_fini()
1071 int cl_global_init(void)
1075 OBD_ALLOC(cl_envs, sizeof(*cl_envs) * num_possible_cpus());
1076 if (cl_envs == NULL)
1077 GOTO(out, result = -ENOMEM);
1079 result = lu_kmem_init(cl_object_caches);
1081 GOTO(out_envs, result);
1083 LU_CONTEXT_KEY_INIT(&cl_key);
1084 result = lu_context_key_register(&cl_key);
1086 GOTO(out_kmem, result);
1088 result = cl_env_percpu_init();
1089 if (result) /* no cl_env_percpu_fini on error */
1090 GOTO(out_keys, result);
1095 lu_context_key_degister(&cl_key);
1097 lu_kmem_fini(cl_object_caches);
1099 OBD_FREE(cl_envs, sizeof(*cl_envs) * num_possible_cpus());
1105 * Finalization of global cl-data. Dual to cl_global_init().
1107 void cl_global_fini(void)
1109 cl_env_percpu_fini();
1110 lu_context_key_degister(&cl_key);
1111 lu_kmem_fini(cl_object_caches);
1112 OBD_FREE(cl_envs, sizeof(*cl_envs) * num_possible_cpus());