57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include <linux/spinlock.h>
|
||
|
|
#include <linux/list.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <target/iscsi/iscsi_transport.h>
|
||
|
|
|
||
|
|
static LIST_HEAD(g_transport_list);
|
||
|
|
static DEFINE_MUTEX(transport_mutex);
|
||
|
|
|
||
|
|
struct iscsit_transport *iscsit_get_transport(int type)
|
||
|
|
{
|
||
|
|
struct iscsit_transport *t;
|
||
|
|
|
||
|
|
mutex_lock(&transport_mutex);
|
||
|
|
list_for_each_entry(t, &g_transport_list, t_node) {
|
||
|
|
if (t->transport_type == type) {
|
||
|
|
if (t->owner && !try_module_get(t->owner)) {
|
||
|
|
t = NULL;
|
||
|
|
}
|
||
|
|
mutex_unlock(&transport_mutex);
|
||
|
|
return t;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
mutex_unlock(&transport_mutex);
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
void iscsit_put_transport(struct iscsit_transport *t)
|
||
|
|
{
|
||
|
|
module_put(t->owner);
|
||
|
|
}
|
||
|
|
|
||
|
|
int iscsit_register_transport(struct iscsit_transport *t)
|
||
|
|
{
|
||
|
|
INIT_LIST_HEAD(&t->t_node);
|
||
|
|
|
||
|
|
mutex_lock(&transport_mutex);
|
||
|
|
list_add_tail(&t->t_node, &g_transport_list);
|
||
|
|
mutex_unlock(&transport_mutex);
|
||
|
|
|
||
|
|
pr_debug("Registered iSCSI transport: %s\n", t->name);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(iscsit_register_transport);
|
||
|
|
|
||
|
|
void iscsit_unregister_transport(struct iscsit_transport *t)
|
||
|
|
{
|
||
|
|
mutex_lock(&transport_mutex);
|
||
|
|
list_del(&t->t_node);
|
||
|
|
mutex_unlock(&transport_mutex);
|
||
|
|
|
||
|
|
pr_debug("Unregistered iSCSI transport: %s\n", t->name);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(iscsit_unregister_transport);
|