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Kmalloc-kmem-cache-tests » 0002-batman-adv-use-kmem_cache-for-translation-table.patch

Linus Lüssing, 06/20/2016 04:02 AM

View differences:

net/batman-adv/main.c
static int __init batadv_init(void)
{
int ret;
ret = batadv_tt_cache_init();
if (ret < 0)
return ret;
INIT_LIST_HEAD(&batadv_hardif_list);
INIT_HLIST_HEAD(&batadv_algo_list);
......
batadv_nc_init();
batadv_event_workqueue = create_singlethread_workqueue("bat_events");
if (!batadv_event_workqueue)
return -ENOMEM;
goto err_create_wq;
batadv_socket_init();
batadv_debugfs_init();
......
BATADV_SOURCE_VERSION, BATADV_COMPAT_VERSION);
return 0;
err_create_wq:
batadv_tt_cache_destroy();
return -ENOMEM;
}
static void __exit batadv_exit(void)
......
batadv_event_workqueue = NULL;
rcu_barrier();
batadv_tt_cache_destroy();
}
int batadv_mesh_init(struct net_device *soft_iface)
net/batman-adv/translation-table.c
#include <linux/bitops.h>
#include <linux/bug.h>
#include <linux/byteorder/generic.h>
#include <linux/cache.h>
#include <linux/compiler.h>
#include <linux/crc32c.h>
#include <linux/errno.h>
#include <linux/etherdevice.h>
#include <linux/fs.h>
#include <linux/if_ether.h>
#include <linux/init.h>
#include <linux/jhash.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
......
#include "packet.h"
#include "soft-interface.h"
static struct kmem_cache *batadv_tl_cache __read_mostly;
static struct kmem_cache *batadv_tg_cache __read_mostly;
static struct kmem_cache *batadv_tt_orig_cache __read_mostly;
/* hash class keys */
static struct lock_class_key batadv_tt_local_hash_lock_class_key;
static struct lock_class_key batadv_tt_global_hash_lock_class_key;
......
}
/**
* batadv_tt_local_entry_free_rcu - free the tt_local_entry
* @rcu: rcu pointer of the tt_local_entry
*/
static void batadv_tt_local_entry_free_rcu(struct rcu_head *rcu)
{
struct batadv_tt_local_entry *tt_local_entry;
tt_local_entry = container_of(rcu, struct batadv_tt_local_entry,
common.rcu);
kmem_cache_free(batadv_tl_cache, tt_local_entry);
}
/**
* batadv_tt_local_entry_release - release tt_local_entry from lists and queue
* for free after rcu grace period
* @ref: kref pointer of the nc_node
......
batadv_softif_vlan_put(tt_local_entry->vlan);
kfree_rcu(tt_local_entry, common.rcu);
call_rcu(&tt_local_entry->common.rcu, batadv_tt_local_entry_free_rcu);
}
/**
......
}
/**
* batadv_tt_global_entry_free_rcu - free the tt_global_entry
* @rcu: rcu pointer of the tt_global_entry
*/
static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu)
{
struct batadv_tt_global_entry *tt_global_entry;
tt_global_entry = container_of(rcu, struct batadv_tt_global_entry,
common.rcu);
kmem_cache_free(batadv_tg_cache, tt_global_entry);
}
/**
* batadv_tt_global_entry_release - release tt_global_entry from lists and queue
* for free after rcu grace period
* @ref: kref pointer of the nc_node
......
common.refcount);
batadv_tt_global_del_orig_list(tt_global_entry);
kfree_rcu(tt_global_entry, common.rcu);
call_rcu(&tt_global_entry->common.rcu, batadv_tt_global_entry_free_rcu);
}
/**
......
}
/**
* batadv_tt_orig_list_entry_free_rcu - free the orig_entry
* @rcu: rcu pointer of the orig_entry
*/
static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu)
{
struct batadv_tt_orig_list_entry *orig_entry;
orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu);
kmem_cache_free(batadv_tt_orig_cache, orig_entry);
}
/**
* batadv_tt_orig_list_entry_release - release tt orig entry from lists and
* queue for free after rcu grace period
* @ref: kref pointer of the tt orig entry
......
refcount);
batadv_orig_node_put(orig_entry->orig_node);
kfree_rcu(orig_entry, rcu);
call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu);
}
/**
......
goto out;
}
tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC);
tt_local = kmem_cache_alloc(batadv_tl_cache, GFP_ATOMIC);
if (!tt_local)
goto out;
......
vlan = batadv_softif_vlan_get(bat_priv, vid);
if (WARN(!vlan, "adding TT local entry %pM to non-existent VLAN %d",
addr, BATADV_PRINT_VID(vid))) {
kfree(tt_local);
kmem_cache_free(batadv_tl_cache, tt_local);
tt_local = NULL;
goto out;
}
......
goto out;
}
orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC);
orig_entry = kmem_cache_zalloc(batadv_tt_orig_cache, GFP_ATOMIC);
if (!orig_entry)
goto out;
......
goto out;
if (!tt_global_entry) {
tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC);
tt_global_entry = kmem_cache_zalloc(batadv_tg_cache,
GFP_ATOMIC);
if (!tt_global_entry)
goto out;
......
return ret;
}
/**
* batadv_tt_cache_init - Initialize tt memory object cache
*
* Return: 0 on success or negative error number in case of failure.
*/
int __init batadv_tt_cache_init(void)
{
size_t tl_size = sizeof(struct batadv_tt_local_entry);
size_t tg_size = sizeof(struct batadv_tt_global_entry);
size_t tt_orig_size = sizeof(struct batadv_tt_orig_list_entry);
batadv_tl_cache = kmem_cache_create("batadv_tl_cache", tl_size, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!batadv_tl_cache)
return -ENOMEM;
batadv_tg_cache = kmem_cache_create("batadv_tg_cache", tg_size, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!batadv_tg_cache)
goto err_tg_alloc;
batadv_tt_orig_cache = kmem_cache_create("batadv_tt_orig_cache",
tt_orig_size, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!batadv_tt_orig_cache)
goto err_tt_orig_alloc;
return 0;
err_tt_orig_alloc:
kmem_cache_destroy(batadv_tg_cache);
batadv_tg_cache = NULL;
err_tg_alloc:
kmem_cache_destroy(batadv_tl_cache);
batadv_tl_cache = NULL;
return -ENOMEM;
}
/**
* batadv_tt_cache_destroy - Destroy tt memory object cache
*/
void batadv_tt_cache_destroy(void)
{
kmem_cache_destroy(batadv_tl_cache);
kmem_cache_destroy(batadv_tg_cache);
kmem_cache_destroy(batadv_tt_orig_cache);
}
net/batman-adv/translation-table.h
bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv,
const u8 *addr, unsigned short vid);
int batadv_tt_cache_init(void);
void batadv_tt_cache_destroy(void);
#endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */
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