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 <linux/libcfs/libcfs.h>
55 /* class_put_type() */
56 #include <obd_class.h>
57 #include <obd_support.h>
58 #include <lustre_fid.h>
59 #include <linux/list.h>
60 #include <linux/libcfs/libcfs_hash.h> /* for cfs_hash stuff */
61 #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 * Finalize cl_object_header.
103 void cl_object_header_fini(struct cl_object_header *h)
105 LASSERT(list_empty(&h->coh_locks));
106 lu_object_header_fini(&h->coh_lu);
108 EXPORT_SYMBOL(cl_object_header_fini);
111 * Returns a cl_object with a given \a fid.
113 * Returns either cached or newly created object. Additional reference on the
114 * returned object is acquired.
116 * \see lu_object_find(), cl_page_find(), cl_lock_find()
118 struct cl_object *cl_object_find(const struct lu_env *env,
119 struct cl_device *cd, const struct lu_fid *fid,
120 const struct cl_object_conf *c)
123 return lu2cl(lu_object_find_slice(env, cl2lu_dev(cd), fid, &c->coc_lu));
125 EXPORT_SYMBOL(cl_object_find);
128 * Releases a reference on \a o.
130 * When last reference is released object is returned to the cache, unless
131 * lu_object_header_flags::LU_OBJECT_HEARD_BANSHEE bit is set in its header.
133 * \see cl_page_put(), cl_lock_put().
135 void cl_object_put(const struct lu_env *env, struct cl_object *o)
137 lu_object_put(env, &o->co_lu);
139 EXPORT_SYMBOL(cl_object_put);
142 * Acquire an additional reference to the object \a o.
144 * This can only be used to acquire _additional_ reference, i.e., caller
145 * already has to possess at least one reference to \a o before calling this.
147 * \see cl_page_get(), cl_lock_get().
149 void cl_object_get(struct cl_object *o)
151 lu_object_get(&o->co_lu);
153 EXPORT_SYMBOL(cl_object_get);
156 * Returns the top-object for a given \a o.
158 * \see cl_page_top(), cl_io_top()
160 struct cl_object *cl_object_top(struct cl_object *o)
162 struct cl_object_header *hdr = cl_object_header(o);
163 struct cl_object *top;
165 while (hdr->coh_parent != NULL)
166 hdr = hdr->coh_parent;
168 top = lu2cl(lu_object_top(&hdr->coh_lu));
169 CDEBUG(D_TRACE, "%p -> %p\n", o, top);
172 EXPORT_SYMBOL(cl_object_top);
175 * Returns pointer to the lock protecting data-attributes for the given object
178 * Data-attributes are protected by the cl_object_header::coh_attr_guard
179 * spin-lock in the top-object.
181 * \see cl_attr, cl_object_attr_lock(), cl_object_operations::coo_attr_get().
183 static spinlock_t *cl_object_attr_guard(struct cl_object *o)
185 return &cl_object_header(cl_object_top(o))->coh_attr_guard;
189 * Locks data-attributes.
191 * Prevents data-attributes from changing, until lock is released by
192 * cl_object_attr_unlock(). This has to be called before calls to
193 * cl_object_attr_get(), cl_object_attr_set().
195 void cl_object_attr_lock(struct cl_object *o)
197 spin_lock(cl_object_attr_guard(o));
199 EXPORT_SYMBOL(cl_object_attr_lock);
202 * Releases data-attributes lock, acquired by cl_object_attr_lock().
204 void cl_object_attr_unlock(struct cl_object *o)
206 spin_unlock(cl_object_attr_guard(o));
208 EXPORT_SYMBOL(cl_object_attr_unlock);
211 * Returns data-attributes of an object \a obj.
213 * Every layer is asked (by calling cl_object_operations::coo_attr_get())
214 * top-to-bottom to fill in parts of \a attr that this layer is responsible
217 int cl_object_attr_get(const struct lu_env *env, struct cl_object *obj,
218 struct cl_attr *attr)
220 struct lu_object_header *top;
223 LASSERT(spin_is_locked(cl_object_attr_guard(obj)));
225 top = obj->co_lu.lo_header;
227 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
228 if (obj->co_ops->coo_attr_get != NULL) {
229 result = obj->co_ops->coo_attr_get(env, obj, attr);
239 EXPORT_SYMBOL(cl_object_attr_get);
242 * Updates data-attributes of an object \a obj.
244 * Only attributes, mentioned in a validness bit-mask \a v are
245 * updated. Calls cl_object_operations::coo_attr_set() on every layer, bottom
248 int cl_object_attr_set(const struct lu_env *env, struct cl_object *obj,
249 const struct cl_attr *attr, unsigned v)
251 struct lu_object_header *top;
254 LASSERT(spin_is_locked(cl_object_attr_guard(obj)));
256 top = obj->co_lu.lo_header;
258 list_for_each_entry_reverse(obj, &top->loh_layers,
260 if (obj->co_ops->coo_attr_set != NULL) {
261 result = obj->co_ops->coo_attr_set(env, obj, attr, v);
271 EXPORT_SYMBOL(cl_object_attr_set);
274 * Notifies layers (bottom-to-top) that glimpse AST was received.
276 * Layers have to fill \a lvb fields with information that will be shipped
277 * back to glimpse issuer.
279 * \see cl_lock_operations::clo_glimpse()
281 int cl_object_glimpse(const struct lu_env *env, struct cl_object *obj,
284 struct lu_object_header *top;
287 top = obj->co_lu.lo_header;
289 list_for_each_entry_reverse(obj, &top->loh_layers,
291 if (obj->co_ops->coo_glimpse != NULL) {
292 result = obj->co_ops->coo_glimpse(env, obj, lvb);
297 LU_OBJECT_HEADER(D_DLMTRACE, env, lu_object_top(top),
298 "size: "LPU64" mtime: "LPU64" atime: "LPU64" "
299 "ctime: "LPU64" blocks: "LPU64"\n",
300 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime,
301 lvb->lvb_ctime, lvb->lvb_blocks);
304 EXPORT_SYMBOL(cl_object_glimpse);
307 * Updates a configuration of an object \a obj.
309 int cl_conf_set(const struct lu_env *env, struct cl_object *obj,
310 const struct cl_object_conf *conf)
312 struct lu_object_header *top;
315 top = obj->co_lu.lo_header;
317 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
318 if (obj->co_ops->coo_conf_set != NULL) {
319 result = obj->co_ops->coo_conf_set(env, obj, conf);
326 EXPORT_SYMBOL(cl_conf_set);
329 * Helper function removing all object locks, and marking object for
330 * deletion. All object pages must have been deleted at this point.
332 * This is called by cl_inode_fini() and lov_object_delete() to destroy top-
333 * and sub- objects respectively.
335 void cl_object_kill(const struct lu_env *env, struct cl_object *obj)
337 struct cl_object_header *hdr;
339 hdr = cl_object_header(obj);
340 LASSERT(hdr->coh_tree.rnode == NULL);
341 LASSERT(hdr->coh_pages == 0);
343 set_bit(LU_OBJECT_HEARD_BANSHEE, &hdr->coh_lu.loh_flags);
345 * Destroy all locks. Object destruction (including cl_inode_fini())
346 * cannot cancel the locks, because in the case of a local client,
347 * where client and server share the same thread running
348 * prune_icache(), this can dead-lock with ldlm_cancel_handler()
349 * waiting on __wait_on_freeing_inode().
351 cl_locks_prune(env, obj, 0);
353 EXPORT_SYMBOL(cl_object_kill);
356 * Prunes caches of pages and locks for this object.
358 void cl_object_prune(const struct lu_env *env, struct cl_object *obj)
360 cl_pages_prune(env, obj);
361 cl_locks_prune(env, obj, 1);
363 EXPORT_SYMBOL(cl_object_prune);
366 * Check if the object has locks.
368 int cl_object_has_locks(struct cl_object *obj)
370 struct cl_object_header *head = cl_object_header(obj);
373 spin_lock(&head->coh_lock_guard);
374 has = list_empty(&head->coh_locks);
375 spin_unlock(&head->coh_lock_guard);
379 EXPORT_SYMBOL(cl_object_has_locks);
381 void cache_stats_init(struct cache_stats *cs, const char *name)
386 for (i = 0; i < CS_NR; i++)
387 atomic_set(&cs->cs_stats[i], 0);
390 int cache_stats_print(const struct cache_stats *cs, struct seq_file *m, int h)
394 * lookup hit total cached create
395 * env: ...... ...... ...... ...... ......
398 const char *names[CS_NR] = CS_NAMES;
400 seq_printf(m, "%6s", " ");
401 for (i = 0; i < CS_NR; i++)
402 seq_printf(m, "%8s", names[i]);
406 seq_printf(m, "%5.5s:", cs->cs_name);
407 for (i = 0; i < CS_NR; i++)
408 seq_printf(m, "%8u", atomic_read(&cs->cs_stats[i]));
413 * Initialize client site.
415 * Perform common initialization (lu_site_init()), and initialize statistical
416 * counters. Also perform global initializations on the first call.
418 int cl_site_init(struct cl_site *s, struct cl_device *d)
423 result = lu_site_init(&s->cs_lu, &d->cd_lu_dev);
425 cache_stats_init(&s->cs_pages, "pages");
426 cache_stats_init(&s->cs_locks, "locks");
427 for (i = 0; i < ARRAY_SIZE(s->cs_pages_state); ++i)
428 atomic_set(&s->cs_pages_state[0], 0);
429 for (i = 0; i < ARRAY_SIZE(s->cs_locks_state); ++i)
430 atomic_set(&s->cs_locks_state[i], 0);
434 EXPORT_SYMBOL(cl_site_init);
437 * Finalize client site. Dual to cl_site_init().
439 void cl_site_fini(struct cl_site *s)
441 lu_site_fini(&s->cs_lu);
443 EXPORT_SYMBOL(cl_site_fini);
445 static struct cache_stats cl_env_stats = {
447 .cs_stats = { ATOMIC_INIT(0), }
451 * Outputs client site statistical counters into a buffer. Suitable for
452 * ll_rd_*()-style functions.
454 int cl_site_stats_print(const struct cl_site *site, struct seq_file *m)
457 static const char *pstate[] = {
464 static const char *lstate[] = {
467 [CLS_ENQUEUED] = "e",
469 [CLS_INTRANSIT] = "t",
474 lookup hit total busy create
475 pages: ...... ...... ...... ...... ...... [...... ...... ...... ......]
476 locks: ...... ...... ...... ...... ...... [...... ...... ...... ...... ......]
477 env: ...... ...... ...... ...... ......
479 lu_site_stats_print(&site->cs_lu, m);
480 cache_stats_print(&site->cs_pages, m, 1);
482 for (i = 0; i < ARRAY_SIZE(site->cs_pages_state); ++i)
483 seq_printf(m, "%s: %u ", pstate[i],
484 atomic_read(&site->cs_pages_state[i]));
485 seq_printf(m, "]\n");
486 cache_stats_print(&site->cs_locks, m, 0);
488 for (i = 0; i < ARRAY_SIZE(site->cs_locks_state); ++i)
489 seq_printf(m, "%s: %u ", lstate[i],
490 atomic_read(&site->cs_locks_state[i]));
491 seq_printf(m, "]\n");
492 cache_stats_print(&cl_env_stats, m, 0);
496 EXPORT_SYMBOL(cl_site_stats_print);
498 /*****************************************************************************
500 * lu_env handling on client.
505 * The most efficient way is to store cl_env pointer in task specific
506 * structures. On Linux, it wont' be easy to use task_struct->journal_info
507 * because Lustre code may call into other fs which has certain assumptions
508 * about journal_info. Currently following fields in task_struct are identified
509 * can be used for this purpose:
510 * - cl_env: for liblustre.
511 * - tux_info: ony on RedHat kernel.
513 * \note As long as we use task_struct to store cl_env, we assume that once
514 * called into Lustre, we'll never call into the other part of the kernel
515 * which will use those fields in task_struct without explicitly exiting
518 * If there's no space in task_struct is available, hash will be used.
525 struct lu_context ce_ses;
528 * This allows cl_env to be entered into cl_env_hash which implements
529 * the current thread -> client environment lookup.
531 struct hlist_node ce_node;
533 * Owner for the current cl_env.
535 * If LL_TASK_CL_ENV is defined, this point to the owning current,
536 * only for debugging purpose ;
537 * Otherwise hash is used, and this is the key for cfs_hash.
538 * Now current thread pid is stored. Note using thread pointer would
539 * lead to unbalanced hash because of its specific allocation locality
540 * and could be varied for different platforms and OSes, even different
546 * Linkage into global list of all client environments. Used for
547 * garbage collection.
549 struct list_head ce_linkage;
555 * Debugging field: address of the caller who made original
561 #define CL_ENV_INC(counter)
562 #define CL_ENV_DEC(counter)
564 static void cl_env_init0(struct cl_env *cle, void *debug)
566 LASSERT(cle->ce_ref == 0);
567 LASSERT(cle->ce_magic == &cl_env_init0);
568 LASSERT(cle->ce_debug == NULL && cle->ce_owner == NULL);
571 cle->ce_debug = debug;
577 * The implementation of using hash table to connect cl_env and thread
580 static struct cfs_hash *cl_env_hash;
582 static unsigned cl_env_hops_hash(struct cfs_hash *lh,
583 const void *key, unsigned mask)
585 #if BITS_PER_LONG == 64
586 return cfs_hash_u64_hash((__u64)key, mask);
588 return cfs_hash_u32_hash((__u32)key, mask);
592 static void *cl_env_hops_obj(struct hlist_node *hn)
594 struct cl_env *cle = hlist_entry(hn, struct cl_env, ce_node);
595 LASSERT(cle->ce_magic == &cl_env_init0);
599 static int cl_env_hops_keycmp(const void *key, struct hlist_node *hn)
601 struct cl_env *cle = cl_env_hops_obj(hn);
603 LASSERT(cle->ce_owner != NULL);
604 return (key == cle->ce_owner);
607 static void cl_env_hops_noop(struct cfs_hash *hs, struct hlist_node *hn)
609 struct cl_env *cle = hlist_entry(hn, struct cl_env, ce_node);
610 LASSERT(cle->ce_magic == &cl_env_init0);
613 static cfs_hash_ops_t cl_env_hops = {
614 .hs_hash = cl_env_hops_hash,
615 .hs_key = cl_env_hops_obj,
616 .hs_keycmp = cl_env_hops_keycmp,
617 .hs_object = cl_env_hops_obj,
618 .hs_get = cl_env_hops_noop,
619 .hs_put_locked = cl_env_hops_noop,
622 static inline struct cl_env *cl_env_fetch(void)
626 cle = cfs_hash_lookup(cl_env_hash, (void *) (long) current->pid);
627 LASSERT(ergo(cle, cle->ce_magic == &cl_env_init0));
631 static inline void cl_env_attach(struct cl_env *cle)
636 LASSERT(cle->ce_owner == NULL);
637 cle->ce_owner = (void *) (long) current->pid;
638 rc = cfs_hash_add_unique(cl_env_hash, cle->ce_owner,
644 static inline void cl_env_do_detach(struct cl_env *cle)
648 LASSERT(cle->ce_owner == (void *) (long) current->pid);
649 cookie = cfs_hash_del(cl_env_hash, cle->ce_owner,
651 LASSERT(cookie == cle);
652 cle->ce_owner = NULL;
655 static int cl_env_store_init(void) {
656 cl_env_hash = cfs_hash_create("cl_env",
657 HASH_CL_ENV_BITS, HASH_CL_ENV_BITS,
658 HASH_CL_ENV_BKT_BITS, 0,
662 CFS_HASH_RW_BKTLOCK);
663 return cl_env_hash != NULL ? 0 :-ENOMEM;
666 static void cl_env_store_fini(void) {
667 cfs_hash_putref(cl_env_hash);
671 static inline struct cl_env *cl_env_detach(struct cl_env *cle)
674 cle = cl_env_fetch();
676 if (cle && cle->ce_owner)
677 cl_env_do_detach(cle);
682 static struct lu_env *cl_env_new(__u32 ctx_tags, __u32 ses_tags, void *debug)
687 OBD_SLAB_ALLOC_PTR_GFP(cle, cl_env_kmem, __GFP_IO);
691 INIT_LIST_HEAD(&cle->ce_linkage);
692 cle->ce_magic = &cl_env_init0;
694 rc = lu_env_init(env, LCT_CL_THREAD|ctx_tags);
696 rc = lu_context_init(&cle->ce_ses,
697 LCT_SESSION | ses_tags);
699 lu_context_enter(&cle->ce_ses);
700 env->le_ses = &cle->ce_ses;
701 cl_env_init0(cle, debug);
706 OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
713 env = ERR_PTR(-ENOMEM);
717 static void cl_env_fini(struct cl_env *cle)
720 lu_context_fini(&cle->ce_lu.le_ctx);
721 lu_context_fini(&cle->ce_ses);
722 OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
725 static inline struct cl_env *cl_env_container(struct lu_env *env)
727 return container_of(env, struct cl_env, ce_lu);
730 struct lu_env *cl_env_peek(int *refcheck)
737 /* check that we don't go far from untrusted pointer */
738 CLASSERT(offsetof(struct cl_env, ce_magic) == 0);
741 cle = cl_env_fetch();
745 *refcheck = ++cle->ce_ref;
747 CDEBUG(D_OTHER, "%d@%p\n", cle ? cle->ce_ref : 0, cle);
750 EXPORT_SYMBOL(cl_env_peek);
753 * Returns lu_env: if there already is an environment associated with the
754 * current thread, it is returned, otherwise, new environment is allocated.
756 * \param refcheck pointer to a counter used to detect environment leaks. In
757 * the usual case cl_env_get() and cl_env_put() are called in the same lexical
758 * scope and pointer to the same integer is passed as \a refcheck. This is
759 * used to detect missed cl_env_put().
763 struct lu_env *cl_env_get(int *refcheck)
767 env = cl_env_peek(refcheck);
769 env = cl_env_new(lu_context_tags_default,
770 lu_session_tags_default,
771 __builtin_return_address(0));
776 cle = cl_env_container(env);
778 *refcheck = cle->ce_ref;
779 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
784 EXPORT_SYMBOL(cl_env_get);
787 * Forces an allocation of a fresh environment with given tags.
791 struct lu_env *cl_env_alloc(int *refcheck, __u32 tags)
795 LASSERT(cl_env_peek(refcheck) == NULL);
796 env = cl_env_new(tags, tags, __builtin_return_address(0));
800 cle = cl_env_container(env);
801 *refcheck = cle->ce_ref;
802 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
806 EXPORT_SYMBOL(cl_env_alloc);
808 static void cl_env_exit(struct cl_env *cle)
810 LASSERT(cle->ce_owner == NULL);
811 lu_context_exit(&cle->ce_lu.le_ctx);
812 lu_context_exit(&cle->ce_ses);
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, int *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) {
835 cle->ce_debug = NULL;
840 EXPORT_SYMBOL(cl_env_put);
843 * Declares a point of re-entrancy.
845 * \see cl_env_reexit()
847 void *cl_env_reenter(void)
849 return cl_env_detach(NULL);
851 EXPORT_SYMBOL(cl_env_reenter);
856 void cl_env_reexit(void *cookie)
859 cl_env_attach(cookie);
861 EXPORT_SYMBOL(cl_env_reexit);
864 * Setup user-supplied \a env as a current environment. This is to be used to
865 * guaranteed that environment exists even when cl_env_get() fails. It is up
866 * to user to ensure proper concurrency control.
868 * \see cl_env_unplant()
870 void cl_env_implant(struct lu_env *env, int *refcheck)
872 struct cl_env *cle = cl_env_container(env);
874 LASSERT(cle->ce_ref > 0);
877 cl_env_get(refcheck);
878 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
880 EXPORT_SYMBOL(cl_env_implant);
883 * Detach environment installed earlier by cl_env_implant().
885 void cl_env_unplant(struct lu_env *env, int *refcheck)
887 struct cl_env *cle = cl_env_container(env);
889 LASSERT(cle->ce_ref > 1);
891 CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
894 cl_env_put(env, refcheck);
896 EXPORT_SYMBOL(cl_env_unplant);
898 struct lu_env *cl_env_nested_get(struct cl_env_nest *nest)
902 nest->cen_cookie = NULL;
903 env = cl_env_peek(&nest->cen_refcheck);
905 if (!cl_io_is_going(env))
908 cl_env_put(env, &nest->cen_refcheck);
909 nest->cen_cookie = cl_env_reenter();
912 env = cl_env_get(&nest->cen_refcheck);
914 cl_env_reexit(nest->cen_cookie);
918 LASSERT(!cl_io_is_going(env));
921 EXPORT_SYMBOL(cl_env_nested_get);
923 void cl_env_nested_put(struct cl_env_nest *nest, struct lu_env *env)
925 cl_env_put(env, &nest->cen_refcheck);
926 cl_env_reexit(nest->cen_cookie);
928 EXPORT_SYMBOL(cl_env_nested_put);
931 * Converts struct cl_attr to struct ost_lvb.
935 void cl_attr2lvb(struct ost_lvb *lvb, const struct cl_attr *attr)
937 lvb->lvb_size = attr->cat_size;
938 lvb->lvb_mtime = attr->cat_mtime;
939 lvb->lvb_atime = attr->cat_atime;
940 lvb->lvb_ctime = attr->cat_ctime;
941 lvb->lvb_blocks = attr->cat_blocks;
943 EXPORT_SYMBOL(cl_attr2lvb);
946 * Converts struct ost_lvb to struct cl_attr.
950 void cl_lvb2attr(struct cl_attr *attr, const struct ost_lvb *lvb)
952 attr->cat_size = lvb->lvb_size;
953 attr->cat_mtime = lvb->lvb_mtime;
954 attr->cat_atime = lvb->lvb_atime;
955 attr->cat_ctime = lvb->lvb_ctime;
956 attr->cat_blocks = lvb->lvb_blocks;
958 EXPORT_SYMBOL(cl_lvb2attr);
960 /*****************************************************************************
962 * Temporary prototype thing: mirror obd-devices into cl devices.
966 struct cl_device *cl_type_setup(const struct lu_env *env, struct lu_site *site,
967 struct lu_device_type *ldt,
968 struct lu_device *next)
970 const char *typename;
973 LASSERT(ldt != NULL);
975 typename = ldt->ldt_name;
976 d = ldt->ldt_ops->ldto_device_alloc(env, ldt, NULL);
982 rc = ldt->ldt_ops->ldto_device_init(env, d, typename, next);
985 lu_ref_add(&d->ld_reference,
986 "lu-stack", &lu_site_init);
988 ldt->ldt_ops->ldto_device_free(env, d);
989 CERROR("can't init device '%s', %d\n", typename, rc);
993 CERROR("Cannot allocate device: '%s'\n", typename);
996 EXPORT_SYMBOL(cl_type_setup);
999 * Finalize device stack by calling lu_stack_fini().
1001 void cl_stack_fini(const struct lu_env *env, struct cl_device *cl)
1003 lu_stack_fini(env, cl2lu_dev(cl));
1005 EXPORT_SYMBOL(cl_stack_fini);
1007 int cl_lock_init(void);
1008 void cl_lock_fini(void);
1010 int cl_page_init(void);
1011 void cl_page_fini(void);
1013 static struct lu_context_key cl_key;
1015 struct cl_thread_info *cl_env_info(const struct lu_env *env)
1017 return lu_context_key_get(&env->le_ctx, &cl_key);
1020 /* defines cl0_key_{init,fini}() */
1021 LU_KEY_INIT_FINI(cl0, struct cl_thread_info);
1023 static void *cl_key_init(const struct lu_context *ctx,
1024 struct lu_context_key *key)
1026 struct cl_thread_info *info;
1028 info = cl0_key_init(ctx, key);
1029 if (!IS_ERR(info)) {
1032 for (i = 0; i < ARRAY_SIZE(info->clt_counters); ++i)
1033 lu_ref_init(&info->clt_counters[i].ctc_locks_locked);
1038 static void cl_key_fini(const struct lu_context *ctx,
1039 struct lu_context_key *key, void *data)
1041 struct cl_thread_info *info;
1045 for (i = 0; i < ARRAY_SIZE(info->clt_counters); ++i)
1046 lu_ref_fini(&info->clt_counters[i].ctc_locks_locked);
1047 cl0_key_fini(ctx, key, data);
1050 static void cl_key_exit(const struct lu_context *ctx,
1051 struct lu_context_key *key, void *data)
1053 struct cl_thread_info *info = data;
1056 for (i = 0; i < ARRAY_SIZE(info->clt_counters); ++i) {
1057 LASSERT(info->clt_counters[i].ctc_nr_held == 0);
1058 LASSERT(info->clt_counters[i].ctc_nr_used == 0);
1059 LASSERT(info->clt_counters[i].ctc_nr_locks_acquired == 0);
1060 LASSERT(info->clt_counters[i].ctc_nr_locks_locked == 0);
1061 lu_ref_fini(&info->clt_counters[i].ctc_locks_locked);
1062 lu_ref_init(&info->clt_counters[i].ctc_locks_locked);
1066 static struct lu_context_key cl_key = {
1067 .lct_tags = LCT_CL_THREAD,
1068 .lct_init = cl_key_init,
1069 .lct_fini = cl_key_fini,
1070 .lct_exit = cl_key_exit
1073 static struct lu_kmem_descr cl_object_caches[] = {
1075 .ckd_cache = &cl_env_kmem,
1076 .ckd_name = "cl_env_kmem",
1077 .ckd_size = sizeof (struct cl_env)
1085 * Global initialization of cl-data. Create kmem caches, register
1086 * lu_context_key's, etc.
1088 * \see cl_global_fini()
1090 int cl_global_init(void)
1094 result = cl_env_store_init();
1098 result = lu_kmem_init(cl_object_caches);
1102 LU_CONTEXT_KEY_INIT(&cl_key);
1103 result = lu_context_key_register(&cl_key);
1107 result = cl_lock_init();
1111 result = cl_page_init();
1119 lu_context_key_degister(&cl_key);
1121 lu_kmem_fini(cl_object_caches);
1123 cl_env_store_fini();
1128 * Finalization of global cl-data. Dual to cl_global_init().
1130 void cl_global_fini(void)
1134 lu_context_key_degister(&cl_key);
1135 lu_kmem_fini(cl_object_caches);
1136 cl_env_store_fini();