diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/cl_object.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/obdclass/cl_object.c | 1061 |
1 files changed, 0 insertions, 1061 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_object.c b/drivers/staging/lustre/lustre/obdclass/cl_object.c deleted file mode 100644 index 7809f6ae1809..000000000000 --- a/drivers/staging/lustre/lustre/obdclass/cl_object.c +++ /dev/null @@ -1,1061 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 only, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License version 2 for more details (a copy is included - * in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; If not, see - * http://www.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2015, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - * - * Client Lustre Object. - * - * Author: Nikita Danilov <nikita.danilov@sun.com> - * Author: Jinshan Xiong <jinshan.xiong@intel.com> - */ - -/* - * Locking. - * - * i_mutex - * PG_locked - * ->coh_attr_guard - * ->ls_guard - */ - -#define DEBUG_SUBSYSTEM S_CLASS - -#include <linux/libcfs/libcfs.h> -/* class_put_type() */ -#include <obd_class.h> -#include <obd_support.h> -#include <lustre_fid.h> -#include <linux/list.h> -#include <linux/libcfs/libcfs_hash.h> /* for cfs_hash stuff */ -#include <cl_object.h> -#include <lu_object.h> -#include "cl_internal.h" - -static struct kmem_cache *cl_env_kmem; - -/** Lock class of cl_object_header::coh_attr_guard */ -static struct lock_class_key cl_attr_guard_class; - -/** - * Initialize cl_object_header. - */ -int cl_object_header_init(struct cl_object_header *h) -{ - int result; - - result = lu_object_header_init(&h->coh_lu); - if (result == 0) { - spin_lock_init(&h->coh_attr_guard); - lockdep_set_class(&h->coh_attr_guard, &cl_attr_guard_class); - h->coh_page_bufsize = 0; - } - return result; -} -EXPORT_SYMBOL(cl_object_header_init); - -/** - * Returns a cl_object with a given \a fid. - * - * Returns either cached or newly created object. Additional reference on the - * returned object is acquired. - * - * \see lu_object_find(), cl_page_find(), cl_lock_find() - */ -struct cl_object *cl_object_find(const struct lu_env *env, - struct cl_device *cd, const struct lu_fid *fid, - const struct cl_object_conf *c) -{ - might_sleep(); - return lu2cl(lu_object_find_slice(env, cl2lu_dev(cd), fid, &c->coc_lu)); -} -EXPORT_SYMBOL(cl_object_find); - -/** - * Releases a reference on \a o. - * - * When last reference is released object is returned to the cache, unless - * lu_object_header_flags::LU_OBJECT_HEARD_BANSHEE bit is set in its header. - * - * \see cl_page_put(), cl_lock_put(). - */ -void cl_object_put(const struct lu_env *env, struct cl_object *o) -{ - lu_object_put(env, &o->co_lu); -} -EXPORT_SYMBOL(cl_object_put); - -/** - * Acquire an additional reference to the object \a o. - * - * This can only be used to acquire _additional_ reference, i.e., caller - * already has to possess at least one reference to \a o before calling this. - * - * \see cl_page_get(), cl_lock_get(). - */ -void cl_object_get(struct cl_object *o) -{ - lu_object_get(&o->co_lu); -} -EXPORT_SYMBOL(cl_object_get); - -/** - * Returns the top-object for a given \a o. - * - * \see cl_io_top() - */ -struct cl_object *cl_object_top(struct cl_object *o) -{ - struct cl_object_header *hdr = cl_object_header(o); - struct cl_object *top; - - while (hdr->coh_parent) - hdr = hdr->coh_parent; - - top = lu2cl(lu_object_top(&hdr->coh_lu)); - CDEBUG(D_TRACE, "%p -> %p\n", o, top); - return top; -} -EXPORT_SYMBOL(cl_object_top); - -/** - * Returns pointer to the lock protecting data-attributes for the given object - * \a o. - * - * Data-attributes are protected by the cl_object_header::coh_attr_guard - * spin-lock in the top-object. - * - * \see cl_attr, cl_object_attr_lock(), cl_object_operations::coo_attr_get(). - */ -static spinlock_t *cl_object_attr_guard(struct cl_object *o) -{ - return &cl_object_header(cl_object_top(o))->coh_attr_guard; -} - -/** - * Locks data-attributes. - * - * Prevents data-attributes from changing, until lock is released by - * cl_object_attr_unlock(). This has to be called before calls to - * cl_object_attr_get(), cl_object_attr_update(). - */ -void cl_object_attr_lock(struct cl_object *o) - __acquires(cl_object_attr_guard(o)) -{ - spin_lock(cl_object_attr_guard(o)); -} -EXPORT_SYMBOL(cl_object_attr_lock); - -/** - * Releases data-attributes lock, acquired by cl_object_attr_lock(). - */ -void cl_object_attr_unlock(struct cl_object *o) - __releases(cl_object_attr_guard(o)) -{ - spin_unlock(cl_object_attr_guard(o)); -} -EXPORT_SYMBOL(cl_object_attr_unlock); - -/** - * Returns data-attributes of an object \a obj. - * - * Every layer is asked (by calling cl_object_operations::coo_attr_get()) - * top-to-bottom to fill in parts of \a attr that this layer is responsible - * for. - */ -int cl_object_attr_get(const struct lu_env *env, struct cl_object *obj, - struct cl_attr *attr) -{ - struct lu_object_header *top; - int result; - - assert_spin_locked(cl_object_attr_guard(obj)); - - top = obj->co_lu.lo_header; - result = 0; - list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) { - if (obj->co_ops->coo_attr_get) { - result = obj->co_ops->coo_attr_get(env, obj, attr); - if (result != 0) { - if (result > 0) - result = 0; - break; - } - } - } - return result; -} -EXPORT_SYMBOL(cl_object_attr_get); - -/** - * Updates data-attributes of an object \a obj. - * - * Only attributes, mentioned in a validness bit-mask \a v are - * updated. Calls cl_object_operations::coo_attr_update() on every layer, - * bottom to top. - */ -int cl_object_attr_update(const struct lu_env *env, struct cl_object *obj, - const struct cl_attr *attr, unsigned int v) -{ - struct lu_object_header *top; - int result; - - assert_spin_locked(cl_object_attr_guard(obj)); - - top = obj->co_lu.lo_header; - result = 0; - list_for_each_entry_reverse(obj, &top->loh_layers, co_lu.lo_linkage) { - if (obj->co_ops->coo_attr_update) { - result = obj->co_ops->coo_attr_update(env, obj, attr, - v); - if (result != 0) { - if (result > 0) - result = 0; - break; - } - } - } - return result; -} -EXPORT_SYMBOL(cl_object_attr_update); - -/** - * Notifies layers (bottom-to-top) that glimpse AST was received. - * - * Layers have to fill \a lvb fields with information that will be shipped - * back to glimpse issuer. - * - * \see cl_lock_operations::clo_glimpse() - */ -int cl_object_glimpse(const struct lu_env *env, struct cl_object *obj, - struct ost_lvb *lvb) -{ - struct lu_object_header *top; - int result; - - top = obj->co_lu.lo_header; - result = 0; - list_for_each_entry_reverse(obj, &top->loh_layers, co_lu.lo_linkage) { - if (obj->co_ops->coo_glimpse) { - result = obj->co_ops->coo_glimpse(env, obj, lvb); - if (result != 0) - break; - } - } - LU_OBJECT_HEADER(D_DLMTRACE, env, lu_object_top(top), - "size: %llu mtime: %llu atime: %llu ctime: %llu blocks: %llu\n", - lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime, - lvb->lvb_ctime, lvb->lvb_blocks); - return result; -} -EXPORT_SYMBOL(cl_object_glimpse); - -/** - * Updates a configuration of an object \a obj. - */ -int cl_conf_set(const struct lu_env *env, struct cl_object *obj, - const struct cl_object_conf *conf) -{ - struct lu_object_header *top; - int result; - - top = obj->co_lu.lo_header; - result = 0; - list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) { - if (obj->co_ops->coo_conf_set) { - result = obj->co_ops->coo_conf_set(env, obj, conf); - if (result != 0) - break; - } - } - return result; -} -EXPORT_SYMBOL(cl_conf_set); - -/** - * Prunes caches of pages and locks for this object. - */ -int cl_object_prune(const struct lu_env *env, struct cl_object *obj) -{ - struct lu_object_header *top; - struct cl_object *o; - int result; - - top = obj->co_lu.lo_header; - result = 0; - list_for_each_entry(o, &top->loh_layers, co_lu.lo_linkage) { - if (o->co_ops->coo_prune) { - result = o->co_ops->coo_prune(env, o); - if (result != 0) - break; - } - } - - return result; -} -EXPORT_SYMBOL(cl_object_prune); - -/** - * Get stripe information of this object. - */ -int cl_object_getstripe(const struct lu_env *env, struct cl_object *obj, - struct lov_user_md __user *uarg) -{ - struct lu_object_header *top; - int result = 0; - - top = obj->co_lu.lo_header; - list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) { - if (obj->co_ops->coo_getstripe) { - result = obj->co_ops->coo_getstripe(env, obj, uarg); - if (result) - break; - } - } - return result; -} -EXPORT_SYMBOL(cl_object_getstripe); - -/** - * Get fiemap extents from file object. - * - * \param env [in] lustre environment - * \param obj [in] file object - * \param key [in] fiemap request argument - * \param fiemap [out] fiemap extents mapping retrived - * \param buflen [in] max buffer length of @fiemap - * - * \retval 0 success - * \retval < 0 error - */ -int cl_object_fiemap(const struct lu_env *env, struct cl_object *obj, - struct ll_fiemap_info_key *key, - struct fiemap *fiemap, size_t *buflen) -{ - struct lu_object_header *top; - int result = 0; - - top = obj->co_lu.lo_header; - list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) { - if (obj->co_ops->coo_fiemap) { - result = obj->co_ops->coo_fiemap(env, obj, key, fiemap, - buflen); - if (result) - break; - } - } - return result; -} -EXPORT_SYMBOL(cl_object_fiemap); - -int cl_object_layout_get(const struct lu_env *env, struct cl_object *obj, - struct cl_layout *cl) -{ - struct lu_object_header *top = obj->co_lu.lo_header; - - list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) { - if (obj->co_ops->coo_layout_get) - return obj->co_ops->coo_layout_get(env, obj, cl); - } - - return -EOPNOTSUPP; -} -EXPORT_SYMBOL(cl_object_layout_get); - -loff_t cl_object_maxbytes(struct cl_object *obj) -{ - struct lu_object_header *top = obj->co_lu.lo_header; - loff_t maxbytes = LLONG_MAX; - - list_for_each_entry(obj, &top->loh_layers, co_lu.lo_linkage) { - if (obj->co_ops->coo_maxbytes) - maxbytes = min_t(loff_t, obj->co_ops->coo_maxbytes(obj), - maxbytes); - } - - return maxbytes; -} -EXPORT_SYMBOL(cl_object_maxbytes); - -/** - * Helper function removing all object locks, and marking object for - * deletion. All object pages must have been deleted at this point. - * - * This is called by cl_inode_fini() and lov_object_delete() to destroy top- - * and sub- objects respectively. - */ -void cl_object_kill(const struct lu_env *env, struct cl_object *obj) -{ - struct cl_object_header *hdr = cl_object_header(obj); - - set_bit(LU_OBJECT_HEARD_BANSHEE, &hdr->coh_lu.loh_flags); -} -EXPORT_SYMBOL(cl_object_kill); - -void cache_stats_init(struct cache_stats *cs, const char *name) -{ - int i; - - cs->cs_name = name; - for (i = 0; i < CS_NR; i++) - atomic_set(&cs->cs_stats[i], 0); -} - -static int cache_stats_print(const struct cache_stats *cs, - struct seq_file *m, int h) -{ - int i; - /* - * lookup hit total cached create - * env: ...... ...... ...... ...... ...... - */ - if (h) { - const char *names[CS_NR] = CS_NAMES; - - seq_printf(m, "%6s", " "); - for (i = 0; i < CS_NR; i++) - seq_printf(m, "%8s", names[i]); - seq_printf(m, "\n"); - } - - seq_printf(m, "%5.5s:", cs->cs_name); - for (i = 0; i < CS_NR; i++) - seq_printf(m, "%8u", atomic_read(&cs->cs_stats[i])); - return 0; -} - -static void cl_env_percpu_refill(void); - -/** - * Initialize client site. - * - * Perform common initialization (lu_site_init()), and initialize statistical - * counters. Also perform global initializations on the first call. - */ -int cl_site_init(struct cl_site *s, struct cl_device *d) -{ - size_t i; - int result; - - result = lu_site_init(&s->cs_lu, &d->cd_lu_dev); - if (result == 0) { - cache_stats_init(&s->cs_pages, "pages"); - for (i = 0; i < ARRAY_SIZE(s->cs_pages_state); ++i) - atomic_set(&s->cs_pages_state[0], 0); - cl_env_percpu_refill(); - } - return result; -} -EXPORT_SYMBOL(cl_site_init); - -/** - * Finalize client site. Dual to cl_site_init(). - */ -void cl_site_fini(struct cl_site *s) -{ - lu_site_fini(&s->cs_lu); -} -EXPORT_SYMBOL(cl_site_fini); - -static struct cache_stats cl_env_stats = { - .cs_name = "envs", - .cs_stats = { ATOMIC_INIT(0), } -}; - -/** - * Outputs client site statistical counters into a buffer. Suitable for - * ll_rd_*()-style functions. - */ -int cl_site_stats_print(const struct cl_site *site, struct seq_file *m) -{ - size_t i; - static const char * const pstate[] = { - [CPS_CACHED] = "c", - [CPS_OWNED] = "o", - [CPS_PAGEOUT] = "w", - [CPS_PAGEIN] = "r", - [CPS_FREEING] = "f" - }; -/* - lookup hit total busy create -pages: ...... ...... ...... ...... ...... [...... ...... ...... ......] -locks: ...... ...... ...... ...... ...... [...... ...... ...... ...... ......] - env: ...... ...... ...... ...... ...... - */ - lu_site_stats_print(&site->cs_lu, m); - cache_stats_print(&site->cs_pages, m, 1); - seq_puts(m, " ["); - for (i = 0; i < ARRAY_SIZE(site->cs_pages_state); ++i) - seq_printf(m, "%s: %u ", pstate[i], - atomic_read(&site->cs_pages_state[i])); - seq_puts(m, "]\n"); - cache_stats_print(&cl_env_stats, m, 0); - seq_puts(m, "\n"); - return 0; -} -EXPORT_SYMBOL(cl_site_stats_print); - -/***************************************************************************** - * - * lu_env handling on client. - * - */ - -/** - * The most efficient way is to store cl_env pointer in task specific - * structures. On Linux, it wont' be easy to use task_struct->journal_info - * because Lustre code may call into other fs which has certain assumptions - * about journal_info. Currently following fields in task_struct are identified - * can be used for this purpose: - * - tux_info: only on RedHat kernel. - * - ... - * \note As long as we use task_struct to store cl_env, we assume that once - * called into Lustre, we'll never call into the other part of the kernel - * which will use those fields in task_struct without explicitly exiting - * Lustre. - * - * If there's no space in task_struct is available, hash will be used. - * bz20044, bz22683. - */ - -static unsigned int cl_envs_cached_max = 32; /* XXX: prototype: arbitrary limit - * for now. - */ -static struct cl_env_cache { - rwlock_t cec_guard; - unsigned int cec_count; - struct list_head cec_envs; -} *cl_envs = NULL; - -struct cl_env { - void *ce_magic; - struct lu_env ce_lu; - struct lu_context ce_ses; - - /* - * Linkage into global list of all client environments. Used for - * garbage collection. - */ - struct list_head ce_linkage; - /* - * - */ - int ce_ref; - /* - * Debugging field: address of the caller who made original - * allocation. - */ - void *ce_debug; -}; - -#define CL_ENV_INC(counter) -#define CL_ENV_DEC(counter) - -static void cl_env_init0(struct cl_env *cle, void *debug) -{ - LASSERT(cle->ce_ref == 0); - LASSERT(cle->ce_magic == &cl_env_init0); - LASSERT(!cle->ce_debug); - - cle->ce_ref = 1; - cle->ce_debug = debug; - CL_ENV_INC(busy); -} - -static struct lu_env *cl_env_new(__u32 ctx_tags, __u32 ses_tags, void *debug) -{ - struct lu_env *env; - struct cl_env *cle; - - cle = kmem_cache_zalloc(cl_env_kmem, GFP_NOFS); - if (cle) { - int rc; - - INIT_LIST_HEAD(&cle->ce_linkage); - cle->ce_magic = &cl_env_init0; - env = &cle->ce_lu; - rc = lu_env_init(env, ctx_tags | LCT_CL_THREAD); - if (rc == 0) { - rc = lu_context_init(&cle->ce_ses, - ses_tags | LCT_SESSION); - if (rc == 0) { - lu_context_enter(&cle->ce_ses); - env->le_ses = &cle->ce_ses; - cl_env_init0(cle, debug); - } else { - lu_env_fini(env); - } - } - if (rc != 0) { - kmem_cache_free(cl_env_kmem, cle); - env = ERR_PTR(rc); - } else { - CL_ENV_INC(create); - CL_ENV_INC(total); - } - } else { - env = ERR_PTR(-ENOMEM); - } - return env; -} - -static void cl_env_fini(struct cl_env *cle) -{ - CL_ENV_DEC(total); - lu_context_fini(&cle->ce_lu.le_ctx); - lu_context_fini(&cle->ce_ses); - kmem_cache_free(cl_env_kmem, cle); -} - -static struct lu_env *cl_env_obtain(void *debug) -{ - struct cl_env *cle; - struct lu_env *env; - int cpu = get_cpu(); - - read_lock(&cl_envs[cpu].cec_guard); - LASSERT(equi(cl_envs[cpu].cec_count == 0, - list_empty(&cl_envs[cpu].cec_envs))); - if (cl_envs[cpu].cec_count > 0) { - int rc; - - cle = container_of(cl_envs[cpu].cec_envs.next, struct cl_env, - ce_linkage); - list_del_init(&cle->ce_linkage); - cl_envs[cpu].cec_count--; - read_unlock(&cl_envs[cpu].cec_guard); - put_cpu(); - - env = &cle->ce_lu; - rc = lu_env_refill(env); - if (rc == 0) { - cl_env_init0(cle, debug); - lu_context_enter(&env->le_ctx); - lu_context_enter(&cle->ce_ses); - } else { - cl_env_fini(cle); - env = ERR_PTR(rc); - } - } else { - read_unlock(&cl_envs[cpu].cec_guard); - put_cpu(); - env = cl_env_new(lu_context_tags_default, - lu_session_tags_default, debug); - } - return env; -} - -static inline struct cl_env *cl_env_container(struct lu_env *env) -{ - return container_of(env, struct cl_env, ce_lu); -} - -/** - * Returns lu_env: if there already is an environment associated with the - * current thread, it is returned, otherwise, new environment is allocated. - * - * Allocations are amortized through the global cache of environments. - * - * \param refcheck pointer to a counter used to detect environment leaks. In - * the usual case cl_env_get() and cl_env_put() are called in the same lexical - * scope and pointer to the same integer is passed as \a refcheck. This is - * used to detect missed cl_env_put(). - * - * \see cl_env_put() - */ -struct lu_env *cl_env_get(u16 *refcheck) -{ - struct lu_env *env; - - env = cl_env_obtain(__builtin_return_address(0)); - if (!IS_ERR(env)) { - struct cl_env *cle; - - cle = cl_env_container(env); - *refcheck = cle->ce_ref; - CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle); - } - return env; -} -EXPORT_SYMBOL(cl_env_get); - -/** - * Forces an allocation of a fresh environment with given tags. - * - * \see cl_env_get() - */ -struct lu_env *cl_env_alloc(u16 *refcheck, u32 tags) -{ - struct lu_env *env; - - env = cl_env_new(tags, tags, __builtin_return_address(0)); - if (!IS_ERR(env)) { - struct cl_env *cle; - - cle = cl_env_container(env); - *refcheck = cle->ce_ref; - CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle); - } - return env; -} -EXPORT_SYMBOL(cl_env_alloc); - -static void cl_env_exit(struct cl_env *cle) -{ - lu_context_exit(&cle->ce_lu.le_ctx); - lu_context_exit(&cle->ce_ses); -} - -/** - * Finalizes and frees a given number of cached environments. This is done to - * (1) free some memory (not currently hooked into VM), or (2) release - * references to modules. - */ -unsigned int cl_env_cache_purge(unsigned int nr) -{ - struct cl_env *cle; - unsigned int i; - - for_each_possible_cpu(i) { - write_lock(&cl_envs[i].cec_guard); - for (; !list_empty(&cl_envs[i].cec_envs) && nr > 0; --nr) { - cle = container_of(cl_envs[i].cec_envs.next, - struct cl_env, ce_linkage); - list_del_init(&cle->ce_linkage); - LASSERT(cl_envs[i].cec_count > 0); - cl_envs[i].cec_count--; - write_unlock(&cl_envs[i].cec_guard); - - cl_env_fini(cle); - write_lock(&cl_envs[i].cec_guard); - } - LASSERT(equi(cl_envs[i].cec_count == 0, - list_empty(&cl_envs[i].cec_envs))); - write_unlock(&cl_envs[i].cec_guard); - } - return nr; -} -EXPORT_SYMBOL(cl_env_cache_purge); - -/** - * Release an environment. - * - * Decrement \a env reference counter. When counter drops to 0, nothing in - * this thread is using environment and it is returned to the allocation - * cache, or freed straight away, if cache is large enough. - */ -void cl_env_put(struct lu_env *env, u16 *refcheck) -{ - struct cl_env *cle; - - cle = cl_env_container(env); - - LASSERT(cle->ce_ref > 0); - LASSERT(ergo(refcheck, cle->ce_ref == *refcheck)); - - CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle); - if (--cle->ce_ref == 0) { - int cpu = get_cpu(); - - CL_ENV_DEC(busy); - cle->ce_debug = NULL; - cl_env_exit(cle); - /* - * Don't bother to take a lock here. - * - * Return environment to the cache only when it was allocated - * with the standard tags. - */ - if (cl_envs[cpu].cec_count < cl_envs_cached_max && - (env->le_ctx.lc_tags & ~LCT_HAS_EXIT) == LCT_CL_THREAD && - (env->le_ses->lc_tags & ~LCT_HAS_EXIT) == LCT_SESSION) { - read_lock(&cl_envs[cpu].cec_guard); - list_add(&cle->ce_linkage, &cl_envs[cpu].cec_envs); - cl_envs[cpu].cec_count++; - read_unlock(&cl_envs[cpu].cec_guard); - } else { - cl_env_fini(cle); - } - put_cpu(); - } -} -EXPORT_SYMBOL(cl_env_put); - -/** - * Converts struct ost_lvb to struct cl_attr. - * - * \see cl_attr2lvb - */ -void cl_lvb2attr(struct cl_attr *attr, const struct ost_lvb *lvb) -{ - attr->cat_size = lvb->lvb_size; - attr->cat_mtime = lvb->lvb_mtime; - attr->cat_atime = lvb->lvb_atime; - attr->cat_ctime = lvb->lvb_ctime; - attr->cat_blocks = lvb->lvb_blocks; -} -EXPORT_SYMBOL(cl_lvb2attr); - -static struct cl_env cl_env_percpu[NR_CPUS]; - -static int cl_env_percpu_init(void) -{ - struct cl_env *cle; - int tags = LCT_REMEMBER | LCT_NOREF; - int i, j; - int rc = 0; - - for_each_possible_cpu(i) { - struct lu_env *env; - - rwlock_init(&cl_envs[i].cec_guard); - INIT_LIST_HEAD(&cl_envs[i].cec_envs); - cl_envs[i].cec_count = 0; - - cle = &cl_env_percpu[i]; - env = &cle->ce_lu; - - INIT_LIST_HEAD(&cle->ce_linkage); - cle->ce_magic = &cl_env_init0; - rc = lu_env_init(env, LCT_CL_THREAD | tags); - if (rc == 0) { - rc = lu_context_init(&cle->ce_ses, LCT_SESSION | tags); - if (rc == 0) { - lu_context_enter(&cle->ce_ses); - env->le_ses = &cle->ce_ses; - } else { - lu_env_fini(env); - } - } - if (rc != 0) - break; - } - if (rc != 0) { - /* Indices 0 to i (excluding i) were correctly initialized, - * thus we must uninitialize up to i, the rest are undefined. - */ - for (j = 0; j < i; j++) { - cle = &cl_env_percpu[j]; - lu_context_exit(&cle->ce_ses); - lu_context_fini(&cle->ce_ses); - lu_env_fini(&cle->ce_lu); - } - } - - return rc; -} - -static void cl_env_percpu_fini(void) -{ - int i; - - for_each_possible_cpu(i) { - struct cl_env *cle = &cl_env_percpu[i]; - - lu_context_exit(&cle->ce_ses); - lu_context_fini(&cle->ce_ses); - lu_env_fini(&cle->ce_lu); - } -} - -static void cl_env_percpu_refill(void) -{ - int i; - - for_each_possible_cpu(i) - lu_env_refill(&cl_env_percpu[i].ce_lu); -} - -void cl_env_percpu_put(struct lu_env *env) -{ - struct cl_env *cle; - int cpu; - - cpu = smp_processor_id(); - cle = cl_env_container(env); - LASSERT(cle == &cl_env_percpu[cpu]); - - cle->ce_ref--; - LASSERT(cle->ce_ref == 0); - - CL_ENV_DEC(busy); - cle->ce_debug = NULL; - - put_cpu(); -} -EXPORT_SYMBOL(cl_env_percpu_put); - -struct lu_env *cl_env_percpu_get(void) -{ - struct cl_env *cle; - - cle = &cl_env_percpu[get_cpu()]; - cl_env_init0(cle, __builtin_return_address(0)); - - return &cle->ce_lu; -} -EXPORT_SYMBOL(cl_env_percpu_get); - -/***************************************************************************** - * - * Temporary prototype thing: mirror obd-devices into cl devices. - * - */ - -struct cl_device *cl_type_setup(const struct lu_env *env, struct lu_site *site, - struct lu_device_type *ldt, - struct lu_device *next) -{ - const char *typename; - struct lu_device *d; - - typename = ldt->ldt_name; - d = ldt->ldt_ops->ldto_device_alloc(env, ldt, NULL); - if (!IS_ERR(d)) { - int rc; - - if (site) - d->ld_site = site; - rc = ldt->ldt_ops->ldto_device_init(env, d, typename, next); - if (rc == 0) { - lu_device_get(d); - lu_ref_add(&d->ld_reference, - "lu-stack", &lu_site_init); - } else { - ldt->ldt_ops->ldto_device_free(env, d); - CERROR("can't init device '%s', %d\n", typename, rc); - d = ERR_PTR(rc); - } - } else { - CERROR("Cannot allocate device: '%s'\n", typename); - } - return lu2cl_dev(d); -} -EXPORT_SYMBOL(cl_type_setup); - -/** - * Finalize device stack by calling lu_stack_fini(). - */ -void cl_stack_fini(const struct lu_env *env, struct cl_device *cl) -{ - lu_stack_fini(env, cl2lu_dev(cl)); -} -EXPORT_SYMBOL(cl_stack_fini); - -static struct lu_context_key cl_key; - -struct cl_thread_info *cl_env_info(const struct lu_env *env) -{ - return lu_context_key_get(&env->le_ctx, &cl_key); -} - -/* defines cl0_key_{init,fini}() */ -LU_KEY_INIT_FINI(cl0, struct cl_thread_info); - -static void *cl_key_init(const struct lu_context *ctx, - struct lu_context_key *key) -{ - return cl0_key_init(ctx, key); -} - -static void cl_key_fini(const struct lu_context *ctx, - struct lu_context_key *key, void *data) -{ - cl0_key_fini(ctx, key, data); -} - -static struct lu_context_key cl_key = { - .lct_tags = LCT_CL_THREAD, - .lct_init = cl_key_init, - .lct_fini = cl_key_fini, -}; - -static struct lu_kmem_descr cl_object_caches[] = { - { - .ckd_cache = &cl_env_kmem, - .ckd_name = "cl_env_kmem", - .ckd_size = sizeof(struct cl_env) - }, - { - .ckd_cache = NULL - } -}; - -/** - * Global initialization of cl-data. Create kmem caches, register - * lu_context_key's, etc. - * - * \see cl_global_fini() - */ -int cl_global_init(void) -{ - int result; - - cl_envs = kcalloc(num_possible_cpus(), sizeof(*cl_envs), GFP_KERNEL); - if (!cl_envs) { - result = -ENOMEM; - goto out; - } - - result = lu_kmem_init(cl_object_caches); - if (result) - goto out_envs; - - LU_CONTEXT_KEY_INIT(&cl_key); - result = lu_context_key_register(&cl_key); - if (result) - goto out_kmem; - - result = cl_env_percpu_init(); - if (result) - /* no cl_env_percpu_fini on error */ - goto out_keys; - - return 0; - -out_keys: - lu_context_key_degister(&cl_key); -out_kmem: - lu_kmem_fini(cl_object_caches); -out_envs: - kfree(cl_envs); -out: - return result; -} - -/** - * Finalization of global cl-data. Dual to cl_global_init(). - */ -void cl_global_fini(void) -{ - cl_env_percpu_fini(); - lu_context_key_degister(&cl_key); - lu_kmem_fini(cl_object_caches); - kfree(cl_envs); -} |