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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Client Lustre Object.
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
52 #define DEBUG_SUBSYSTEM S_CLASS
54 #include "../../include/linux/libcfs/libcfs.h"
55 /* class_put_type() */
56 #include "../include/obd_class.h"
57 #include "../include/obd_support.h"
58 #include "../include/lustre_fid.h"
59 #include <linux/list.h>
60 #include "../../include/linux/libcfs/libcfs_hash.h" /* for cfs_hash stuff */
61 #include "../include/cl_object.h"
62 #include "cl_internal.h"
64 static struct kmem_cache *cl_env_kmem;
66 /** Lock class of cl_object_header::coh_page_guard */
67 static struct lock_class_key cl_page_guard_class;
68 /** Lock class of cl_object_header::coh_lock_guard */
69 static struct lock_class_key cl_lock_guard_class;
70 /** Lock class of cl_object_header::coh_attr_guard */
71 static struct lock_class_key cl_attr_guard_class;
73 extern __u32 lu_context_tags_default;
74 extern __u32 lu_session_tags_default;
76 * Initialize cl_object_header.
78 int cl_object_header_init(struct cl_object_header *h)
82 result = lu_object_header_init(&h->coh_lu);
84 spin_lock_init(&h->coh_page_guard);
85 spin_lock_init(&h->coh_lock_guard);
86 spin_lock_init(&h->coh_attr_guard);
87 lockdep_set_class(&h->coh_page_guard, &cl_page_guard_class);
88 lockdep_set_class(&h->coh_lock_guard, &cl_lock_guard_class);
89 lockdep_set_class(&h->coh_attr_guard, &cl_attr_guard_class);
91 /* XXX hard coded GFP_* mask. */
92 INIT_RADIX_TREE(&h->coh_tree, GFP_ATOMIC);
93 INIT_LIST_HEAD(&h->coh_locks);
94 h->coh_page_bufsize = ALIGN(sizeof(struct cl_page), 8);
98 EXPORT_SYMBOL(cl_object_header_init);
101 * Returns a cl_object with a given \a fid.
103 * Returns either cached or newly created object. Additional reference on the
104 * returned object is acquired.
106 * \see lu_object_find(), cl_page_find(), cl_lock_find()
108 struct cl_object *cl_object_find(const struct lu_env *env,
109 struct cl_device *cd, const struct lu_fid *fid,
110 const struct cl_object_conf *c)
113 return lu2cl(lu_object_find_slice(env, cl2lu_dev(cd), fid, &c->coc_lu));
115 EXPORT_SYMBOL(cl_object_find);
118 * Releases a reference on \a o.
120 * When last reference is released object is returned to the cache, unless
121 * lu_object_header_flags::LU_OBJECT_HEARD_BANSHEE bit is set in its header.
123 * \see cl_page_put(), cl_lock_put().
125 void cl_object_put(const struct lu_env *env, struct cl_object *o)
127 lu_object_put(env, &o->co_lu);
129 EXPORT_SYMBOL(cl_object_put);
132 * Acquire an additional reference to the object \a o.
134 * This can only be used to acquire _additional_ reference, i.e., caller
135 * already has to possess at least one reference to \a o before calling this.
137 * \see cl_page_get(), cl_lock_get().
139 void cl_object_get(struct cl_object *o)
141 lu_object_get(&o->co_lu);
143 EXPORT_SYMBOL(cl_object_get);
146 * Returns the top-object for a given \a o.
148 * \see cl_page_top(), cl_io_top()
150 struct cl_object *cl_object_top(struct cl_object *o)
152 struct cl_object_header *hdr = cl_object_header(o);
153 struct cl_object *top;
155 while (hdr->coh_parent != NULL)
156 hdr = hdr->coh_parent;
158 top = lu2cl(lu_object_top(&hdr->coh_lu));
159 CDEBUG(D_TRACE, "%p -> %p\n", o, top);
162 EXPORT_SYMBOL(cl_object_top);
165 * Returns pointer to the lock protecting data-attributes for the given object
168 * Data-attributes are protected by the cl_object_header::coh_attr_guard
169 * spin-lock in the top-object.
171 * \see cl_attr, cl_object_attr_lock(), cl_object_operations::coo_attr_get().
173 static spinlock_t *cl_object_attr_guard(struct cl_object *o)
175 return &cl_object_header(cl_object_top(o))->coh_attr_guard;
179 * Locks data-attributes.
181 * Prevents data-attributes from changing, until lock is released by
182 * cl_object_attr_unlock(). This has to be called before calls to
183 * cl_object_attr_get(), cl_object_attr_set().
185 void cl_object_attr_lock(struct cl_object *o)
186 __acquires(cl_object_attr_guard(o))
188 spin_lock(cl_object_attr_guard(o));
190 EXPORT_SYMBOL(cl_object_attr_lock);
193 * Releases data-attributes lock, acquired by cl_object_attr_lock().
195 void cl_object_attr_unlock(struct cl_object *o)
196 __releases(cl_object_attr_guard(o))
198 spin_unlock(cl_object_attr_guard(o));
200 EXPORT_SYMBOL(cl_object_attr_unlock);
203 * Returns data-attributes of an object \a obj.
205 * Every layer is asked (by calling cl_object_operations::coo_attr_get())
206 * top-to-bottom to fill in parts of \a attr that this layer is responsible
209 int cl_object_attr_get(const struct lu_env *env, struct cl_object *obj,
210 struct cl_attr *attr)
212 struct lu_object_header *top;
215 assert_spin_locked(cl_object_attr_guard(obj));
217 top = obj->co_lu.lo_header;
219 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
220 if (obj->co_ops->coo_attr_get != NULL) {
221 result = obj->co_ops->coo_attr_get(env, obj, attr);
231 EXPORT_SYMBOL(cl_object_attr_get);
234 * Updates data-attributes of an object \a obj.
236 * Only attributes, mentioned in a validness bit-mask \a v are
237 * updated. Calls cl_object_operations::coo_attr_set() on every layer, bottom
240 int cl_object_attr_set(const struct lu_env *env, struct cl_object *obj,
241 const struct cl_attr *attr, unsigned v)
243 struct lu_object_header *top;
246 assert_spin_locked(cl_object_attr_guard(obj));
248 top = obj->co_lu.lo_header;
250 list_for_each_entry_reverse(obj, &top->loh_layers,
252 if (obj->co_ops->coo_attr_set != NULL) {
253 result = obj->co_ops->coo_attr_set(env, obj, attr, v);
263 EXPORT_SYMBOL(cl_object_attr_set);
266 * Notifies layers (bottom-to-top) that glimpse AST was received.
268 * Layers have to fill \a lvb fields with information that will be shipped
269 * back to glimpse issuer.
271 * \see cl_lock_operations::clo_glimpse()
273 int cl_object_glimpse(const struct lu_env *env, struct cl_object *obj,
276 struct lu_object_header *top;
279 top = obj->co_lu.lo_header;
281 list_for_each_entry_reverse(obj, &top->loh_layers,
283 if (obj->co_ops->coo_glimpse != NULL) {
284 result = obj->co_ops->coo_glimpse(env, obj, lvb);
289 LU_OBJECT_HEADER(D_DLMTRACE, env, lu_object_top(top),
290 "size: %llu mtime: %llu atime: %llu ctime: %llu blocks: %llu\n",
291 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime,
292 lvb->lvb_ctime, lvb->lvb_blocks);
295 EXPORT_SYMBOL(cl_object_glimpse);
298 * Updates a configuration of an object \a obj.
300 int cl_conf_set(const struct lu_env *env, struct cl_object *obj,
301 const struct cl_object_conf *conf)
303 struct lu_object_header *top;
306 top = obj->co_lu.lo_header;
308 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
309 if (obj->co_ops->coo_conf_set != NULL) {
310 result = obj->co_ops->coo_conf_set(env, obj, conf);
317 EXPORT_SYMBOL(cl_conf_set);
320 * Helper function removing all object locks, and marking object for
321 * deletion. All object pages must have been deleted at this point.
323 * This is called by cl_inode_fini() and lov_object_delete() to destroy top-
324 * and sub- objects respectively.
326 void cl_object_kill(const struct lu_env *env, struct cl_object *obj)
328 struct cl_object_header *hdr;
330 hdr = cl_object_header(obj);
331 LASSERT(hdr->coh_tree.rnode == NULL);
332 LASSERT(hdr->coh_pages == 0);
334 set_bit(LU_OBJECT_HEARD_BANSHEE, &hdr->coh_lu.loh_flags);
336 * Destroy all locks. Object destruction (including cl_inode_fini())
337 * cannot cancel the locks, because in the case of a local client,
338 * where client and server share the same thread running
339 * prune_icache(), this can dead-lock with ldlm_cancel_handler()
340 * waiting on __wait_on_freeing_inode().
342 cl_locks_prune(env, obj, 0);
344 EXPORT_SYMBOL(cl_object_kill);
347 * Prunes caches of pages and locks for this object.
349 void cl_object_prune(const struct lu_env *env, struct cl_object *obj)
351 cl_pages_prune(env, obj);
352 cl_locks_prune(env, obj, 1);
354 EXPORT_SYMBOL(cl_object_prune);
356 void cache_stats_init(struct cache_stats *cs, const char *name)
361 for (i = 0; i < CS_NR; i++)
362 atomic_set(&cs->cs_stats[i], 0);
365 int cache_stats_print(const struct cache_stats *cs, struct seq_file *m, int h)
369 * lookup hit total cached create
370 * env: ...... ...... ...... ...... ......
373 const char *names[CS_NR] = CS_NAMES;
375 seq_printf(m, "%6s", " ");
376 for (i = 0; i < CS_NR; i++)
377 seq_printf(m, "%8s", names[i]);
381 seq_printf(m, "%5.5s:", cs->cs_name);
382 for (i = 0; i < CS_NR; i++)
383 seq_printf(m, "%8u", atomic_read(&cs->cs_stats[i]));
388 * Initialize client site.
390 * Perform common initialization (lu_site_init()), and initialize statistical
391 * counters. Also perform global initializations on the first call.
393 int cl_site_init(struct cl_site *s, struct cl_device *d)
398 result = lu_site_init(&s->cs_lu, &d->cd_lu_dev);
400 cache_stats_init(&s->cs_pages, "pages");
401 cache_stats_init(&s->cs_locks, "locks");
402 for (i = 0; i < ARRAY_SIZE(s->cs_pages_state); ++i)
403 atomic_set(&s->cs_pages_state[0], 0);
404 for (i = 0; i < ARRAY_SIZE(s->cs_locks_state); ++i)
405 atomic_set(&s->cs_locks_state[i], 0);
409 EXPORT_SYMBOL(cl_site_init);
412 * Finalize client site. Dual to cl_site_init().
414 void cl_site_fini(struct cl_site *s)
416 lu_site_fini(&s->cs_lu);
418 EXPORT_SYMBOL(cl_site_fini);
420 static struct cache_stats cl_env_stats = {
422 .cs_stats = { ATOMIC_INIT(0), }
426 * Outputs client site statistical counters into a buffer. Suitable for
427 * ll_rd_*()-style functions.
429 int cl_site_stats_print(const struct cl_site *site, struct seq_file *m)
432 static const char *pstate[] = {
439 static const char *lstate[] = {
442 [CLS_ENQUEUED] = "e",
444 [CLS_INTRANSIT] = "t",
449 lookup hit total busy create
450 pages: ...... ...... ...... ...... ...... [...... ...... ...... ......]
451 locks: ...... ...... ...... ...... ...... [...... ...... ...... ...... ......]
452 env: ...... ...... ...... ...... ......
454 lu_site_stats_print(&site->cs_lu, m);
455 cache_stats_print(&site->cs_pages, m, 1);
457 for (i = 0; i < ARRAY_SIZE(site->cs_pages_state); ++i)
458 seq_printf(m, "%s: %u ", pstate[i],
459 atomic_read(&site->cs_pages_state[i]));
460 seq_printf(m, "]\n");
461 cache_stats_print(&site->cs_locks, m, 0);
463 for (i = 0; i < ARRAY_SIZE(site->cs_locks_state); ++i)
464 seq_printf(m, "%s: %u ", lstate[i],
465 atomic_read(&site->cs_locks_state[i]));
466 seq_printf(m, "]\n");
467 cache_stats_print(&cl_env_stats, m, 0);
471 EXPORT_SYMBOL(cl_site_stats_print);
473 /*****************************************************************************
475 * lu_env handling on client.
480 * The most efficient way is to store cl_env pointer in task specific
481 * structures. On Linux, it wont' be easy to use task_struct->journal_info
482 * because Lustre code may call into other fs which has certain assumptions
483 * about journal_info. Currently following fields in task_struct are identified
484 * can be used for this purpose:
485 * - cl_env: for liblustre.
486 * - tux_info: only on RedHat kernel.
488 * \note As long as we use task_struct to store cl_env, we assume that once
489 * called into Lustre, we'll never call into the other part of the kernel
490 * which will use those fields in task_struct without explicitly exiting
493 * If there's no space in task_struct is available, hash will be used.
500 struct lu_context ce_ses;
503 * This allows cl_env to be entered into cl_env_hash which implements
504 * the current thread -> client environment lookup.
506 struct hlist_node ce_node;
508 * Owner for the current cl_env.
510 * If LL_TASK_CL_ENV is defined, this point to the owning current,
511 * only for debugging purpose ;
512 * Otherwise hash is used, and this is the key for cfs_hash.
513 * Now current thread pid is stored. Note using thread pointer would
514 * lead to unbalanced hash because of its specific allocation locality
515 * and could be varied for different platforms and OSes, even different
521 * Linkage into global list of all client environments. Used for
522 * garbage collection.
524 struct list_head ce_linkage;
530 * Debugging field: address of the caller who made original
536 #define CL_ENV_INC(counter)
537 #define CL_ENV_DEC(counter)
539 static void cl_env_init0(struct cl_env *cle, void *debug)
541 LASSERT(cle->ce_ref == 0);
542 LASSERT(cle->ce_magic == &cl_env_init0);
543 LASSERT(cle->ce_debug == NULL && cle->ce_owner == NULL);
546 cle->ce_debug = debug;
551 * The implementation of using hash table to connect cl_env and thread
554 static struct cfs_hash *cl_env_hash;
556 static unsigned cl_env_hops_hash(struct cfs_hash *lh,
557 const void *key, unsigned mask)
559 #if BITS_PER_LONG == 64
560 return cfs_hash_u64_hash((__u64)key, mask);
562 return cfs_hash_u32_hash((__u32)key, mask);
566 static void *cl_env_hops_obj(struct hlist_node *hn)
568 struct cl_env *cle = hlist_entry(hn, struct cl_env, ce_node);
570 LASSERT(cle->ce_magic == &cl_env_init0);
574 static int cl_env_hops_keycmp(const void *key, struct hlist_node *hn)
576 struct cl_env *cle = cl_env_hops_obj(hn);
578 LASSERT(cle->ce_owner != NULL);
579 return (key == cle->ce_owner);
582 static void cl_env_hops_noop(struct cfs_hash *hs, struct hlist_node *hn)
584 struct cl_env *cle = hlist_entry(hn, struct cl_env, ce_node);
586 LASSERT(cle->ce_magic == &cl_env_init0);
589 static struct cfs_hash_ops cl_env_hops = {
590 .hs_hash = cl_env_hops_hash,
591 .hs_key = cl_env_hops_obj,
592 .hs_keycmp = cl_env_hops_keycmp,
593 .hs_object = cl_env_hops_obj,
594 .hs_get = cl_env_hops_noop,
595 .hs_put_locked = cl_env_hops_noop,
598 static inline struct cl_env *cl_env_fetch(void)
602 cle = cfs_hash_lookup(cl_env_hash, (void *) (long) current->pid);
603 LASSERT(ergo(cle, cle->ce_magic == &cl_env_init0));
607 static inline void cl_env_attach(struct cl_env *cle)
612 LASSERT(cle->ce_owner == NULL);
613 cle->ce_owner = (void *) (long) current->pid;
614 rc = cfs_hash_add_unique(cl_env_hash, cle->ce_owner,
620 static inline void cl_env_do_detach(struct cl_env *cle)
624 LASSERT(cle->ce_owner == (void *) (long) current->pid);
625 cookie = cfs_hash_del(cl_env_hash, cle->ce_owner,
627 LASSERT(cookie == cle);
628 cle->ce_owner = NULL;
631 static int cl_env_store_init(void)
633 cl_env_hash = cfs_hash_create("cl_env",
634 HASH_CL_ENV_BITS, HASH_CL_ENV_BITS,
635 HASH_CL_ENV_BKT_BITS, 0,
639 CFS_HASH_RW_BKTLOCK);
640 return cl_env_hash != NULL ? 0 : -ENOMEM;
643 static void cl_env_store_fini(void)
645 cfs_hash_putref(cl_env_hash);
648 static inline struct cl_env *cl_env_detach(struct cl_env *cle)
651 cle = cl_env_fetch();
653 if (cle && cle->ce_owner)
654 cl_env_do_detach(cle);
659 static struct lu_env *cl_env_new(__u32 ctx_tags, __u32 ses_tags, void *debug)
664 cle = kmem_cache_alloc(cl_env_kmem, GFP_NOFS | __GFP_ZERO);
668 INIT_LIST_HEAD(&cle->ce_linkage);
669 cle->ce_magic = &cl_env_init0;
671 rc = lu_env_init(env, ctx_tags | LCT_CL_THREAD);
673 rc = lu_context_init(&cle->ce_ses,
674 ses_tags | LCT_SESSION);
676 lu_context_enter(&cle->ce_ses);
677 env->le_ses = &cle->ce_ses;
678 cl_env_init0(cle, debug);
683 kmem_cache_free(cl_env_kmem, cle);
690 env = ERR_PTR(-ENOMEM);
694 static void cl_env_fini(struct cl_env *cle)
697 lu_context_fini(&cle->ce_lu.le_ctx);
698 lu_context_fini(&cle->ce_ses);
699 kmem_cache_free(cl_env_kmem, cle);
702 static inline struct cl_env *cl_env_container(struct lu_env *env)
704 return container_of(env, struct cl_env, ce_lu);
707 struct lu_env *cl_env_peek(int *refcheck)
714 /* check that we don't go far from untrusted pointer */
715 CLASSERT(offsetof(struct cl_env, ce_magic) == 0);
718 cle = cl_env_fetch();
722 *refcheck = ++cle->ce_ref;
724 CDEBUG(D_OTHER, "%d@%p\n", cle ? cle->ce_ref : 0, cle);
727 EXPORT_SYMBOL(cl_env_peek);
730 * Returns lu_env: if there already is an environment associated with the
731 * current thread, it is returned, otherwise, new environment is allocated.
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(int *refcheck)
744 env = cl_env_peek(refcheck);
746 env = cl_env_new(lu_context_tags_default,
747 lu_session_tags_default,
748 __builtin_return_address(0));
753 cle = cl_env_container(env);
755 *refcheck = cle->ce_ref;
756 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
761 EXPORT_SYMBOL(cl_env_get);
764 * Forces an allocation of a fresh environment with given tags.
768 struct lu_env *cl_env_alloc(int *refcheck, __u32 tags)
772 LASSERT(cl_env_peek(refcheck) == NULL);
773 env = cl_env_new(tags, tags, __builtin_return_address(0));
777 cle = cl_env_container(env);
778 *refcheck = cle->ce_ref;
779 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
783 EXPORT_SYMBOL(cl_env_alloc);
785 static void cl_env_exit(struct cl_env *cle)
787 LASSERT(cle->ce_owner == NULL);
788 lu_context_exit(&cle->ce_lu.le_ctx);
789 lu_context_exit(&cle->ce_ses);
793 * Release an environment.
795 * Decrement \a env reference counter. When counter drops to 0, nothing in
796 * this thread is using environment and it is returned to the allocation
797 * cache, or freed straight away, if cache is large enough.
799 void cl_env_put(struct lu_env *env, int *refcheck)
803 cle = cl_env_container(env);
805 LASSERT(cle->ce_ref > 0);
806 LASSERT(ergo(refcheck != NULL, cle->ce_ref == *refcheck));
808 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
809 if (--cle->ce_ref == 0) {
812 cle->ce_debug = NULL;
817 EXPORT_SYMBOL(cl_env_put);
820 * Declares a point of re-entrancy.
822 * \see cl_env_reexit()
824 void *cl_env_reenter(void)
826 return cl_env_detach(NULL);
828 EXPORT_SYMBOL(cl_env_reenter);
833 void cl_env_reexit(void *cookie)
836 cl_env_attach(cookie);
838 EXPORT_SYMBOL(cl_env_reexit);
841 * Setup user-supplied \a env as a current environment. This is to be used to
842 * guaranteed that environment exists even when cl_env_get() fails. It is up
843 * to user to ensure proper concurrency control.
845 * \see cl_env_unplant()
847 void cl_env_implant(struct lu_env *env, int *refcheck)
849 struct cl_env *cle = cl_env_container(env);
851 LASSERT(cle->ce_ref > 0);
854 cl_env_get(refcheck);
855 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
857 EXPORT_SYMBOL(cl_env_implant);
860 * Detach environment installed earlier by cl_env_implant().
862 void cl_env_unplant(struct lu_env *env, int *refcheck)
864 struct cl_env *cle = cl_env_container(env);
866 LASSERT(cle->ce_ref > 1);
868 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
871 cl_env_put(env, refcheck);
873 EXPORT_SYMBOL(cl_env_unplant);
875 struct lu_env *cl_env_nested_get(struct cl_env_nest *nest)
879 nest->cen_cookie = NULL;
880 env = cl_env_peek(&nest->cen_refcheck);
882 if (!cl_io_is_going(env))
884 cl_env_put(env, &nest->cen_refcheck);
885 nest->cen_cookie = cl_env_reenter();
887 env = cl_env_get(&nest->cen_refcheck);
889 cl_env_reexit(nest->cen_cookie);
893 LASSERT(!cl_io_is_going(env));
896 EXPORT_SYMBOL(cl_env_nested_get);
898 void cl_env_nested_put(struct cl_env_nest *nest, struct lu_env *env)
900 cl_env_put(env, &nest->cen_refcheck);
901 cl_env_reexit(nest->cen_cookie);
903 EXPORT_SYMBOL(cl_env_nested_put);
906 * Converts struct ost_lvb to struct cl_attr.
910 void cl_lvb2attr(struct cl_attr *attr, const struct ost_lvb *lvb)
912 attr->cat_size = lvb->lvb_size;
913 attr->cat_mtime = lvb->lvb_mtime;
914 attr->cat_atime = lvb->lvb_atime;
915 attr->cat_ctime = lvb->lvb_ctime;
916 attr->cat_blocks = lvb->lvb_blocks;
918 EXPORT_SYMBOL(cl_lvb2attr);
920 /*****************************************************************************
922 * Temporary prototype thing: mirror obd-devices into cl devices.
926 struct cl_device *cl_type_setup(const struct lu_env *env, struct lu_site *site,
927 struct lu_device_type *ldt,
928 struct lu_device *next)
930 const char *typename;
933 LASSERT(ldt != NULL);
935 typename = ldt->ldt_name;
936 d = ldt->ldt_ops->ldto_device_alloc(env, ldt, NULL);
942 rc = ldt->ldt_ops->ldto_device_init(env, d, typename, next);
945 lu_ref_add(&d->ld_reference,
946 "lu-stack", &lu_site_init);
948 ldt->ldt_ops->ldto_device_free(env, d);
949 CERROR("can't init device '%s', %d\n", typename, rc);
953 CERROR("Cannot allocate device: '%s'\n", typename);
956 EXPORT_SYMBOL(cl_type_setup);
959 * Finalize device stack by calling lu_stack_fini().
961 void cl_stack_fini(const struct lu_env *env, struct cl_device *cl)
963 lu_stack_fini(env, cl2lu_dev(cl));
965 EXPORT_SYMBOL(cl_stack_fini);
967 int cl_lock_init(void);
968 void cl_lock_fini(void);
970 int cl_page_init(void);
971 void cl_page_fini(void);
973 static struct lu_context_key cl_key;
975 struct cl_thread_info *cl_env_info(const struct lu_env *env)
977 return lu_context_key_get(&env->le_ctx, &cl_key);
980 /* defines cl0_key_{init,fini}() */
981 LU_KEY_INIT_FINI(cl0, struct cl_thread_info);
983 static void *cl_key_init(const struct lu_context *ctx,
984 struct lu_context_key *key)
986 struct cl_thread_info *info;
988 info = cl0_key_init(ctx, key);
992 for (i = 0; i < ARRAY_SIZE(info->clt_counters); ++i)
993 lu_ref_init(&info->clt_counters[i].ctc_locks_locked);
998 static void cl_key_fini(const struct lu_context *ctx,
999 struct lu_context_key *key, void *data)
1001 struct cl_thread_info *info;
1005 for (i = 0; i < ARRAY_SIZE(info->clt_counters); ++i)
1006 lu_ref_fini(&info->clt_counters[i].ctc_locks_locked);
1007 cl0_key_fini(ctx, key, data);
1010 static void cl_key_exit(const struct lu_context *ctx,
1011 struct lu_context_key *key, void *data)
1013 struct cl_thread_info *info = data;
1016 for (i = 0; i < ARRAY_SIZE(info->clt_counters); ++i) {
1017 LASSERT(info->clt_counters[i].ctc_nr_held == 0);
1018 LASSERT(info->clt_counters[i].ctc_nr_used == 0);
1019 LASSERT(info->clt_counters[i].ctc_nr_locks_acquired == 0);
1020 LASSERT(info->clt_counters[i].ctc_nr_locks_locked == 0);
1021 lu_ref_fini(&info->clt_counters[i].ctc_locks_locked);
1022 lu_ref_init(&info->clt_counters[i].ctc_locks_locked);
1026 static struct lu_context_key cl_key = {
1027 .lct_tags = LCT_CL_THREAD,
1028 .lct_init = cl_key_init,
1029 .lct_fini = cl_key_fini,
1030 .lct_exit = cl_key_exit
1033 static struct lu_kmem_descr cl_object_caches[] = {
1035 .ckd_cache = &cl_env_kmem,
1036 .ckd_name = "cl_env_kmem",
1037 .ckd_size = sizeof(struct cl_env)
1045 * Global initialization of cl-data. Create kmem caches, register
1046 * lu_context_key's, etc.
1048 * \see cl_global_fini()
1050 int cl_global_init(void)
1054 result = cl_env_store_init();
1058 result = lu_kmem_init(cl_object_caches);
1062 LU_CONTEXT_KEY_INIT(&cl_key);
1063 result = lu_context_key_register(&cl_key);
1067 result = cl_lock_init();
1071 result = cl_page_init();
1079 lu_context_key_degister(&cl_key);
1081 lu_kmem_fini(cl_object_caches);
1083 cl_env_store_fini();
1088 * Finalization of global cl-data. Dual to cl_global_init().
1090 void cl_global_fini(void)
1094 lu_context_key_degister(&cl_key);
1095 lu_kmem_fini(cl_object_caches);
1096 cl_env_store_fini();