1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
30 * Use is subject to license terms.
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 # define EXPORT_SYMTAB
57 #include <libcfs/libcfs.h>
58 /* class_put_type() */
59 #include <obd_class.h>
60 #include <obd_support.h>
61 #include <lustre_fid.h>
62 #include <libcfs/list.h>
63 #include <class_hash.h> /* for lustre_hash stuff */
64 /* lu_time_global_{init,fini}() */
67 #include <cl_object.h>
68 #include "cl_internal.h"
70 static cfs_mem_cache_t *cl_env_kmem;
72 /** Lock class of cl_object_header::coh_page_guard */
73 static struct lock_class_key cl_page_guard_class;
74 /** Lock class of cl_object_header::coh_lock_guard */
75 static struct lock_class_key cl_lock_guard_class;
76 /** Lock class of cl_object_header::coh_attr_guard */
77 static struct lock_class_key cl_attr_guard_class;
80 * Initialize cl_object_header.
82 int cl_object_header_init(struct cl_object_header *h)
87 result = lu_object_header_init(&h->coh_lu);
89 spin_lock_init(&h->coh_page_guard);
90 spin_lock_init(&h->coh_lock_guard);
91 spin_lock_init(&h->coh_attr_guard);
92 lockdep_set_class(&h->coh_attr_guard, &cl_page_guard_class);
93 lockdep_set_class(&h->coh_attr_guard, &cl_lock_guard_class);
94 lockdep_set_class(&h->coh_attr_guard, &cl_attr_guard_class);
96 /* XXX hard coded GFP_* mask. */
97 INIT_RADIX_TREE(&h->coh_tree, GFP_ATOMIC);
98 CFS_INIT_LIST_HEAD(&h->coh_locks);
102 EXPORT_SYMBOL(cl_object_header_init);
105 * Finalize cl_object_header.
107 void cl_object_header_fini(struct cl_object_header *h)
109 LASSERT(list_empty(&h->coh_locks));
110 lu_object_header_fini(&h->coh_lu);
112 EXPORT_SYMBOL(cl_object_header_fini);
115 * Returns a cl_object with a given \a fid.
117 * Returns either cached or newly created object. Additional reference on the
118 * returned object is acquired.
120 * \see lu_object_find(), cl_page_find(), cl_lock_find()
122 struct cl_object *cl_object_find(const struct lu_env *env,
123 struct cl_device *cd, const struct lu_fid *fid,
124 const struct cl_object_conf *c)
127 return lu2cl(lu_object_find_slice(env, cl2lu_dev(cd), fid, &c->coc_lu));
129 EXPORT_SYMBOL(cl_object_find);
132 * Releases a reference on \a o.
134 * When last reference is released object is returned to the cache, unless
135 * lu_object_header_flags::LU_OBJECT_HEARD_BANSHEE bit is set in its header.
137 * \see cl_page_put(), cl_lock_put().
139 void cl_object_put(const struct lu_env *env, struct cl_object *o)
141 lu_object_put(env, &o->co_lu);
143 EXPORT_SYMBOL(cl_object_put);
146 * Acquire an additional reference to the object \a o.
148 * This can only be used to acquire _additional_ reference, i.e., caller
149 * already has to possess at least one reference to \a o before calling this.
151 * \see cl_page_get(), cl_lock_get().
153 void cl_object_get(struct cl_object *o)
155 lu_object_get(&o->co_lu);
157 EXPORT_SYMBOL(cl_object_get);
160 * Returns the top-object for a given \a o.
162 * \see cl_page_top(), cl_io_top()
164 struct cl_object *cl_object_top(struct cl_object *o)
166 struct cl_object_header *hdr = cl_object_header(o);
167 struct cl_object *top;
169 while (hdr->coh_parent != NULL)
170 hdr = hdr->coh_parent;
172 top = lu2cl(lu_object_top(&hdr->coh_lu));
173 CDEBUG(D_TRACE, "%p -> %p\n", o, top);
176 EXPORT_SYMBOL(cl_object_top);
179 * Returns pointer to the lock protecting data-attributes for the given object
182 * Data-attributes are protected by the cl_object_header::coh_attr_guard
183 * spin-lock in the top-object.
185 * \see cl_attr, cl_object_attr_lock(), cl_object_operations::coo_attr_get().
187 static spinlock_t *cl_object_attr_guard(struct cl_object *o)
189 return &cl_object_header(cl_object_top(o))->coh_attr_guard;
193 * Locks data-attributes.
195 * Prevents data-attributes from changing, until lock is released by
196 * cl_object_attr_unlock(). This has to be called before calls to
197 * cl_object_attr_get(), cl_object_attr_set().
199 void cl_object_attr_lock(struct cl_object *o)
201 spin_lock(cl_object_attr_guard(o));
203 EXPORT_SYMBOL(cl_object_attr_lock);
206 * Releases data-attributes lock, acquired by cl_object_attr_lock().
208 void cl_object_attr_unlock(struct cl_object *o)
210 spin_unlock(cl_object_attr_guard(o));
212 EXPORT_SYMBOL(cl_object_attr_unlock);
215 * Returns data-attributes of an object \a obj.
217 * Every layer is asked (by calling cl_object_operations::coo_attr_get())
218 * top-to-bottom to fill in parts of \a attr that this layer is responsible
221 int cl_object_attr_get(const struct lu_env *env, struct cl_object *obj,
222 struct cl_attr *attr)
224 struct lu_object_header *top;
227 LASSERT_SPIN_LOCKED(cl_object_attr_guard(obj));
230 top = obj->co_lu.lo_header;
232 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
233 if (obj->co_ops->coo_attr_get != NULL) {
234 result = obj->co_ops->coo_attr_get(env, obj, attr);
244 EXPORT_SYMBOL(cl_object_attr_get);
247 * Updates data-attributes of an object \a obj.
249 * Only attributes, mentioned in a validness bit-mask \a v are
250 * updated. Calls cl_object_operations::coo_attr_set() on every layer, bottom
253 int cl_object_attr_set(const struct lu_env *env, struct cl_object *obj,
254 const struct cl_attr *attr, unsigned v)
256 struct lu_object_header *top;
259 LASSERT_SPIN_LOCKED(cl_object_attr_guard(obj));
262 top = obj->co_lu.lo_header;
264 list_for_each_entry_reverse(obj, &top->loh_layers, co_lu.lo_linkage) {
265 if (obj->co_ops->coo_attr_set != NULL) {
266 result = obj->co_ops->coo_attr_set(env, obj, attr, v);
276 EXPORT_SYMBOL(cl_object_attr_set);
279 * Notifies layers (bottom-to-top) that glimpse AST was received.
281 * Layers have to fill \a lvb fields with information that will be shipped
282 * back to glimpse issuer.
284 * \see cl_lock_operations::clo_glimpse()
286 int cl_object_glimpse(const struct lu_env *env, struct cl_object *obj,
289 struct lu_object_header *top;
293 top = obj->co_lu.lo_header;
295 list_for_each_entry_reverse(obj, &top->loh_layers, co_lu.lo_linkage) {
296 if (obj->co_ops->coo_glimpse != NULL) {
297 result = obj->co_ops->coo_glimpse(env, obj, lvb);
302 LU_OBJECT_HEADER(D_DLMTRACE, env, lu_object_top(top),
303 "size: "LPU64" mtime: "LPU64" atime: "LPU64" "
304 "ctime: "LPU64" blocks: "LPU64"\n",
305 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime,
306 lvb->lvb_ctime, lvb->lvb_blocks);
309 EXPORT_SYMBOL(cl_object_glimpse);
312 * Updates a configuration of an object \a obj.
314 int cl_conf_set(const struct lu_env *env, struct cl_object *obj,
315 const struct cl_object_conf *conf)
317 struct lu_object_header *top;
321 top = obj->co_lu.lo_header;
323 list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) {
324 if (obj->co_ops->coo_conf_set != NULL) {
325 result = obj->co_ops->coo_conf_set(env, obj, conf);
332 EXPORT_SYMBOL(cl_conf_set);
335 * Helper function removing all object locks, and marking object for
336 * deletion. All object pages must have been deleted at this point.
338 * This is called by cl_inode_fini() and lov_object_delete() to destroy top-
339 * and sub- objects respectively.
341 void cl_object_kill(const struct lu_env *env, struct cl_object *obj)
343 struct cl_object_header *hdr;
345 hdr = cl_object_header(obj);
346 LASSERT(hdr->coh_tree.rnode == NULL);
347 LASSERT(hdr->coh_pages == 0);
349 set_bit(LU_OBJECT_HEARD_BANSHEE, &hdr->coh_lu.loh_flags);
351 * Destroy all locks. Object destruction (including cl_inode_fini())
352 * cannot cancel the locks, because in the case of a local client,
353 * where client and server share the same thread running
354 * prune_icache(), this can dead-lock with ldlm_cancel_handler()
355 * waiting on __wait_on_freeing_inode().
357 cl_locks_prune(env, obj, 0);
359 EXPORT_SYMBOL(cl_object_kill);
362 * Prunes caches of pages and locks for this object.
364 void cl_object_prune(const struct lu_env *env, struct cl_object *obj)
367 cl_pages_prune(env, obj);
368 cl_locks_prune(env, obj, 1);
371 EXPORT_SYMBOL(cl_object_prune);
373 void cache_stats_init(struct cache_stats *cs, const char *name)
376 atomic_set(&cs->cs_lookup, 0);
377 atomic_set(&cs->cs_hit, 0);
378 atomic_set(&cs->cs_total, 0);
379 atomic_set(&cs->cs_busy, 0);
382 int cache_stats_print(const struct cache_stats *cs,
383 char *page, int count, int h)
387 lookup hit total cached create
388 env: ...... ...... ...... ...... ......
391 nob += snprintf(page, count,
392 " lookup hit total busy create\n");
394 nob += snprintf(page + nob, count - nob,
395 "%5.5s: %6u %6u %6u %6u %6u",
397 atomic_read(&cs->cs_lookup),
398 atomic_read(&cs->cs_hit),
399 atomic_read(&cs->cs_total),
400 atomic_read(&cs->cs_busy),
401 atomic_read(&cs->cs_created));
406 * Initialize client site.
408 * Perform common initialization (lu_site_init()), and initialize statistical
409 * counters. Also perform global initializations on the first call.
411 int cl_site_init(struct cl_site *s, struct cl_device *d)
416 result = lu_site_init(&s->cs_lu, &d->cd_lu_dev);
418 cache_stats_init(&s->cs_pages, "pages");
419 cache_stats_init(&s->cs_locks, "locks");
420 for (i = 0; i < ARRAY_SIZE(s->cs_pages_state); ++i)
421 atomic_set(&s->cs_pages_state[0], 0);
422 for (i = 0; i < ARRAY_SIZE(s->cs_locks_state); ++i)
423 atomic_set(&s->cs_locks_state[i], 0);
427 EXPORT_SYMBOL(cl_site_init);
430 * Finalize client site. Dual to cl_site_init().
432 void cl_site_fini(struct cl_site *s)
434 lu_site_fini(&s->cs_lu);
436 EXPORT_SYMBOL(cl_site_fini);
438 static struct cache_stats cl_env_stats = {
440 .cs_created = ATOMIC_INIT(0),
441 .cs_lookup = ATOMIC_INIT(0),
442 .cs_hit = ATOMIC_INIT(0),
443 .cs_total = ATOMIC_INIT(0),
444 .cs_busy = ATOMIC_INIT(0)
448 * Outputs client site statistical counters into a buffer. Suitable for
449 * ll_rd_*()-style functions.
451 int cl_site_stats_print(const struct cl_site *site, char *page, int count)
455 static const char *pstate[] = {
462 static const char *lstate[] = {
465 [CLS_ENQUEUED] = "e",
467 [CLS_UNLOCKING] = "u",
472 lookup hit total busy create
473 pages: ...... ...... ...... ...... ...... [...... ...... ...... ......]
474 locks: ...... ...... ...... ...... ...... [...... ...... ...... ...... ......]
475 env: ...... ...... ...... ...... ......
477 nob = lu_site_stats_print(&site->cs_lu, page, count);
478 nob += cache_stats_print(&site->cs_pages, page + nob, count - nob, 1);
479 nob += snprintf(page + nob, count - nob, " [");
480 for (i = 0; i < ARRAY_SIZE(site->cs_pages_state); ++i)
481 nob += snprintf(page + nob, count - nob, "%s: %u ",
483 atomic_read(&site->cs_pages_state[i]));
484 nob += snprintf(page + nob, count - nob, "]\n");
485 nob += cache_stats_print(&site->cs_locks, page + nob, count - nob, 0);
486 nob += snprintf(page + nob, count - nob, " [");
487 for (i = 0; i < ARRAY_SIZE(site->cs_locks_state); ++i)
488 nob += snprintf(page + nob, count - nob, "%s: %u ",
490 atomic_read(&site->cs_locks_state[i]));
491 nob += snprintf(page + nob, count - nob, "]\n");
492 nob += cache_stats_print(&cl_env_stats, page + nob, count - nob, 0);
493 nob += snprintf(page + nob, count - nob, "\n");
496 EXPORT_SYMBOL(cl_site_stats_print);
498 /*****************************************************************************
500 * lu_env handling on client.
504 static CFS_LIST_HEAD(cl_envs);
505 static unsigned cl_envs_cached_nr = 0;
506 static unsigned cl_envs_cached_max = 128; /* XXX: prototype: arbitrary limit
508 static spinlock_t cl_envs_guard = SPIN_LOCK_UNLOCKED;
513 struct lu_context ce_ses;
515 * This allows cl_env to be entered into cl_env_hash which implements
516 * the current thread -> client environment lookup.
518 struct hlist_node ce_node;
520 * Owner for the current cl_env, the key for lustre_hash.
521 * Now current thread pointer is stored.
525 * Linkage into global list of all client environments. Used for
526 * garbage collection.
528 struct list_head ce_linkage;
534 * Debugging field: address of the caller who made original
540 #define CL_ENV_INC(counter) atomic_inc(&cl_env_stats.counter)
542 #define CL_ENV_DEC(counter) \
544 LASSERT(atomic_read(&cl_env_stats.counter) > 0); \
545 atomic_dec(&cl_env_stats.counter); \
548 /*****************************************************************************
549 * Routins to use lustre_hash functionality to bind the current thread
553 /** lustre hash to manage the cl_env for current thread */
554 static lustre_hash_t *cl_env_hash;
555 static void cl_env_init0(struct cl_env *cle, void *debug);
557 static unsigned cl_env_hops_hash(lustre_hash_t *lh, void *key, unsigned mask)
559 #if BITS_PER_LONG == 64
560 return lh_u64_hash((__u64)key, mask);
562 return lh_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);
569 LASSERT(cle->ce_magic == &cl_env_init0);
573 static int cl_env_hops_compare(void *key, struct hlist_node *hn)
575 struct cl_env *cle = cl_env_hops_obj(hn);
577 LASSERT(cle->ce_owner != NULL);
578 return (key == cle->ce_owner);
581 static lustre_hash_ops_t cl_env_hops = {
582 .lh_hash = cl_env_hops_hash,
583 .lh_compare = cl_env_hops_compare,
584 .lh_key = cl_env_hops_obj,
585 .lh_get = cl_env_hops_obj,
586 .lh_put = cl_env_hops_obj,
589 static inline struct cl_env *cl_env_fetch(void)
592 cle = lustre_hash_lookup(cl_env_hash, cfs_current());
593 LASSERT(ergo(cle, cle->ce_magic == &cl_env_init0));
597 static inline void cl_env_attach(struct cl_env *cle)
601 LASSERT(cle->ce_owner == NULL);
602 cle->ce_owner = cfs_current();
603 rc = lustre_hash_add_unique(cl_env_hash, cle->ce_owner,
609 static inline struct cl_env *cl_env_detach(struct cl_env *cle)
612 cle = cl_env_fetch();
613 if (cle && cle->ce_owner) {
615 LASSERT(cle->ce_owner == cfs_current());
616 cookie = lustre_hash_del(cl_env_hash, cle->ce_owner,
618 cle->ce_owner = NULL;
619 LASSERT(cookie == cle);
623 /* ----------------------- hash routines end ---------------------------- */
625 static void cl_env_init0(struct cl_env *cle, void *debug)
627 LASSERT(cle->ce_ref == 0);
628 LASSERT(cle->ce_magic == &cl_env_init0);
629 LASSERT(cle->ce_debug == NULL && cle->ce_owner == NULL);
632 cle->ce_debug = debug;
636 static struct lu_env *cl_env_new(__u32 tags, void *debug)
641 OBD_SLAB_ALLOC_PTR_GFP(cle, cl_env_kmem, CFS_ALLOC_IO);
645 CFS_INIT_LIST_HEAD(&cle->ce_linkage);
646 cle->ce_magic = &cl_env_init0;
648 rc = lu_env_init(env, LCT_CL_THREAD|tags);
650 rc = lu_context_init(&cle->ce_ses, LCT_SESSION|tags);
652 lu_context_enter(&cle->ce_ses);
653 env->le_ses = &cle->ce_ses;
654 cl_env_init0(cle, debug);
659 OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
662 CL_ENV_INC(cs_created);
663 CL_ENV_INC(cs_total);
666 env = ERR_PTR(-ENOMEM);
670 static void cl_env_fini(struct cl_env *cle)
672 CL_ENV_DEC(cs_total);
673 lu_context_fini(&cle->ce_lu.le_ctx);
674 lu_context_fini(&cle->ce_ses);
675 OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
678 static struct lu_env *cl_env_obtain(void *debug)
684 spin_lock(&cl_envs_guard);
685 LASSERT(equi(cl_envs_cached_nr == 0, list_empty(&cl_envs)));
686 if (cl_envs_cached_nr > 0) {
689 cle = container_of(cl_envs.next, struct cl_env, ce_linkage);
690 list_del_init(&cle->ce_linkage);
692 spin_unlock(&cl_envs_guard);
695 rc = lu_env_refill(env);
697 cl_env_init0(cle, debug);
698 lu_context_enter(&env->le_ctx);
699 lu_context_enter(&cle->ce_ses);
705 spin_unlock(&cl_envs_guard);
706 env = cl_env_new(0, debug);
711 static inline struct cl_env *cl_env_container(struct lu_env *env)
713 return container_of(env, struct cl_env, ce_lu);
716 struct lu_env *cl_env_peek(int *refcheck)
721 CL_ENV_INC(cs_lookup);
723 /* check that we don't go far from untrusted pointer */
724 CLASSERT(offsetof(struct cl_env, ce_magic) == 0);
727 cle = cl_env_fetch();
731 *refcheck = ++cle->ce_ref;
733 CDEBUG(D_OTHER, "%i@%p\n", cle ? cle->ce_ref : 0, cle);
736 EXPORT_SYMBOL(cl_env_peek);
739 * Returns lu_env: if there already is an environment associated with the
740 * current thread, it is returned, otherwise, new environment is allocated.
742 * Allocations are amortized through the global cache of environments.
744 * \param refcheck pointer to a counter used to detect environment leaks. In
745 * the usual case cl_env_get() and cl_env_put() are called in the same lexical
746 * scope and pointer to the same integer is passed as \a refcheck. This is
747 * used to detect missed cl_env_put().
751 struct lu_env *cl_env_get(int *refcheck)
755 env = cl_env_peek(refcheck);
757 env = cl_env_obtain(__builtin_return_address(0));
761 cle = cl_env_container(env);
763 *refcheck = cle->ce_ref;
764 CDEBUG(D_OTHER, "%i@%p\n", cle->ce_ref, cle);
769 EXPORT_SYMBOL(cl_env_get);
772 * Forces an allocation of a fresh environment with given tags.
776 struct lu_env *cl_env_alloc(int *refcheck, __u32 tags)
780 LASSERT(cl_env_peek(refcheck) == NULL);
781 env = cl_env_new(tags, __builtin_return_address(0));
785 cle = cl_env_container(env);
786 *refcheck = cle->ce_ref;
787 CDEBUG(D_OTHER, "%i@%p\n", cle->ce_ref, cle);
791 EXPORT_SYMBOL(cl_env_alloc);
793 static void cl_env_exit(struct cl_env *cle)
795 LASSERT(cle->ce_owner == NULL);
796 lu_context_exit(&cle->ce_lu.le_ctx);
797 lu_context_exit(&cle->ce_ses);
801 * Finalizes and frees a given number of cached environments. This is done to
802 * (1) free some memory (not currently hooked into VM), or (2) release
803 * references to modules.
805 unsigned cl_env_cache_purge(unsigned nr)
810 spin_lock(&cl_envs_guard);
811 for (; !list_empty(&cl_envs) && nr > 0; --nr) {
812 cle = container_of(cl_envs.next, struct cl_env, ce_linkage);
813 list_del_init(&cle->ce_linkage);
814 LASSERT(cl_envs_cached_nr > 0);
816 spin_unlock(&cl_envs_guard);
819 spin_lock(&cl_envs_guard);
821 LASSERT(equi(cl_envs_cached_nr == 0, list_empty(&cl_envs)));
822 spin_unlock(&cl_envs_guard);
825 EXPORT_SYMBOL(cl_env_cache_purge);
828 * Release an environment.
830 * Decrement \a env reference counter. When counter drops to 0, nothing in
831 * this thread is using environment and it is returned to the allocation
832 * cache, or freed straight away, if cache is large enough.
834 void cl_env_put(struct lu_env *env, int *refcheck)
838 cle = cl_env_container(env);
840 LASSERT(cle->ce_ref > 0);
841 LASSERT(ergo(refcheck != NULL, cle->ce_ref == *refcheck));
843 CDEBUG(D_OTHER, "%i@%p\n", cle->ce_ref, cle);
844 if (--cle->ce_ref == 0) {
847 cle->ce_debug = NULL;
850 * Don't bother to take a lock here.
852 * Return environment to the cache only when it was allocated
853 * with the standard tags.
855 if (cl_envs_cached_nr < cl_envs_cached_max &&
856 (env->le_ctx.lc_tags & ~LCT_HAS_EXIT) == LCT_CL_THREAD &&
857 (env->le_ses->lc_tags & ~LCT_HAS_EXIT) == LCT_SESSION) {
858 spin_lock(&cl_envs_guard);
859 list_add(&cle->ce_linkage, &cl_envs);
861 spin_unlock(&cl_envs_guard);
866 EXPORT_SYMBOL(cl_env_put);
869 * Declares a point of re-entrancy.
871 * \see cl_env_reexit()
873 void *cl_env_reenter(void)
875 return cl_env_detach(NULL);
877 EXPORT_SYMBOL(cl_env_reenter);
882 void cl_env_reexit(void *cookie)
885 cl_env_attach(cookie);
887 EXPORT_SYMBOL(cl_env_reexit);
890 * Setup user-supplied \a env as a current environment. This is to be used to
891 * guaranteed that environment exists even when cl_env_get() fails. It is up
892 * to user to ensure proper concurrency control.
894 * \see cl_env_unplant()
896 void cl_env_implant(struct lu_env *env, int *refcheck)
898 struct cl_env *cle = cl_env_container(env);
900 LASSERT(cle->ce_ref > 0);
903 cl_env_get(refcheck);
904 CDEBUG(D_OTHER, "%i@%p\n", cle->ce_ref, cle);
906 EXPORT_SYMBOL(cl_env_implant);
909 * Detach environment installed earlier by cl_env_implant().
911 void cl_env_unplant(struct lu_env *env, int *refcheck)
913 struct cl_env *cle = cl_env_container(env);
915 LASSERT(cle->ce_ref > 1);
917 CDEBUG(D_OTHER, "%i@%p\n", cle->ce_ref, cle);
920 cl_env_put(env, refcheck);
922 EXPORT_SYMBOL(cl_env_unplant);
924 struct lu_env *cl_env_nested_get(struct cl_env_nest *nest)
928 nest->cen_cookie = NULL;
929 env = cl_env_peek(&nest->cen_refcheck);
931 if (!cl_io_is_going(env))
934 cl_env_put(env, &nest->cen_refcheck);
935 nest->cen_cookie = cl_env_reenter();
938 env = cl_env_get(&nest->cen_refcheck);
940 cl_env_reexit(nest->cen_cookie);
944 LASSERT(!cl_io_is_going(env));
947 EXPORT_SYMBOL(cl_env_nested_get);
949 void cl_env_nested_put(struct cl_env_nest *nest, struct lu_env *env)
951 cl_env_put(env, &nest->cen_refcheck);
952 cl_env_reexit(nest->cen_cookie);
954 EXPORT_SYMBOL(cl_env_nested_put);
957 * Converts struct cl_attr to struct ost_lvb.
961 void cl_attr2lvb(struct ost_lvb *lvb, const struct cl_attr *attr)
964 lvb->lvb_size = attr->cat_size;
965 lvb->lvb_mtime = attr->cat_mtime;
966 lvb->lvb_atime = attr->cat_atime;
967 lvb->lvb_ctime = attr->cat_ctime;
968 lvb->lvb_blocks = attr->cat_blocks;
971 EXPORT_SYMBOL(cl_attr2lvb);
974 * Converts struct ost_lvb to struct cl_attr.
978 void cl_lvb2attr(struct cl_attr *attr, const struct ost_lvb *lvb)
981 attr->cat_size = lvb->lvb_size;
982 attr->cat_mtime = lvb->lvb_mtime;
983 attr->cat_atime = lvb->lvb_atime;
984 attr->cat_ctime = lvb->lvb_ctime;
985 attr->cat_blocks = lvb->lvb_blocks;
988 EXPORT_SYMBOL(cl_lvb2attr);
990 /*****************************************************************************
992 * Temporary prototype thing: mirror obd-devices into cl devices.
996 struct cl_device *cl_type_setup(const struct lu_env *env, struct lu_site *site,
997 struct lu_device_type *ldt,
998 struct lu_device *next)
1000 const char *typename;
1001 struct lu_device *d;
1003 LASSERT(ldt != NULL);
1005 typename = ldt->ldt_name;
1006 d = ldt->ldt_ops->ldto_device_alloc(env, ldt, NULL);
1012 rc = ldt->ldt_ops->ldto_device_init(env, d, typename, next);
1015 lu_ref_add(&d->ld_reference,
1016 "lu-stack", &lu_site_init);
1018 ldt->ldt_ops->ldto_device_free(env, d);
1019 CERROR("can't init device '%s', %d\n", typename, rc);
1023 CERROR("Cannot allocate device: '%s'\n", typename);
1024 return lu2cl_dev(d);
1026 EXPORT_SYMBOL(cl_type_setup);
1029 * Finalize device stack by calling lu_stack_fini().
1031 void cl_stack_fini(const struct lu_env *env, struct cl_device *cl)
1033 lu_stack_fini(env, cl2lu_dev(cl));
1035 EXPORT_SYMBOL(cl_stack_fini);
1037 int cl_lock_init(void);
1038 void cl_lock_fini(void);
1040 int cl_page_init(void);
1041 void cl_page_fini(void);
1043 static struct lu_context_key cl_key;
1045 struct cl_thread_info *cl_env_info(const struct lu_env *env)
1047 return lu_context_key_get(&env->le_ctx, &cl_key);
1050 /* defines cl0_key_{init,fini}() */
1051 LU_KEY_INIT_FINI(cl0, struct cl_thread_info);
1053 static void *cl_key_init(const struct lu_context *ctx,
1054 struct lu_context_key *key)
1056 struct cl_thread_info *info;
1058 info = cl0_key_init(ctx, key);
1059 if (!IS_ERR(info)) {
1062 for (i = 0; i < ARRAY_SIZE(info->clt_counters); ++i)
1063 lu_ref_init(&info->clt_counters[i].ctc_locks_locked);
1068 static void cl_key_fini(const struct lu_context *ctx,
1069 struct lu_context_key *key, void *data)
1071 struct cl_thread_info *info;
1075 for (i = 0; i < ARRAY_SIZE(info->clt_counters); ++i)
1076 lu_ref_fini(&info->clt_counters[i].ctc_locks_locked);
1077 cl0_key_fini(ctx, key, data);
1080 static void cl_key_exit(const struct lu_context *ctx,
1081 struct lu_context_key *key, void *data)
1083 struct cl_thread_info *info = data;
1086 for (i = 0; i < ARRAY_SIZE(info->clt_counters); ++i) {
1087 LASSERT(info->clt_counters[i].ctc_nr_held == 0);
1088 LASSERT(info->clt_counters[i].ctc_nr_used == 0);
1089 LASSERT(info->clt_counters[i].ctc_nr_locks_acquired == 0);
1090 LASSERT(info->clt_counters[i].ctc_nr_locks_locked == 0);
1091 lu_ref_fini(&info->clt_counters[i].ctc_locks_locked);
1092 lu_ref_init(&info->clt_counters[i].ctc_locks_locked);
1096 static struct lu_context_key cl_key = {
1097 .lct_tags = LCT_CL_THREAD,
1098 .lct_init = cl_key_init,
1099 .lct_fini = cl_key_fini,
1100 .lct_exit = cl_key_exit
1103 static struct lu_kmem_descr cl_object_caches[] = {
1105 .ckd_cache = &cl_env_kmem,
1106 .ckd_name = "cl_env_kmem",
1107 .ckd_size = sizeof (struct cl_env)
1115 * Global initialization of cl-data. Create kmem caches, register
1116 * lu_context_key's, etc.
1118 * \see cl_global_fini()
1120 int cl_global_init(void)
1124 cl_env_hash = lustre_hash_init("cl_env", 8, 10, &cl_env_hops, 0);
1125 if (cl_env_hash == NULL)
1128 result = lu_kmem_init(cl_object_caches);
1130 LU_CONTEXT_KEY_INIT(&cl_key);
1131 result = lu_context_key_register(&cl_key);
1133 result = cl_lock_init();
1135 result = cl_page_init();
1139 lustre_hash_exit(cl_env_hash);
1144 * Finalization of global cl-data. Dual to cl_global_init().
1146 void cl_global_fini(void)
1150 lu_context_key_degister(&cl_key);
1151 lu_kmem_fini(cl_object_caches);
1152 lustre_hash_exit(cl_env_hash);