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path: root/drivers/target/target_core_hba.c
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Diffstat (limited to 'drivers/target/target_core_hba.c')
-rw-r--r--drivers/target/target_core_hba.c96
1 files changed, 54 insertions, 42 deletions
diff --git a/drivers/target/target_core_hba.c b/drivers/target/target_core_hba.c
index e6e496ff9546..62ea4e8e70a8 100644
--- a/drivers/target/target_core_hba.c
+++ b/drivers/target/target_core_hba.c
@@ -39,63 +39,75 @@
#include "target_core_internal.h"
-static LIST_HEAD(subsystem_list);
-static DEFINE_MUTEX(subsystem_mutex);
+static LIST_HEAD(backend_list);
+static DEFINE_MUTEX(backend_mutex);
static u32 hba_id_counter;
static DEFINE_SPINLOCK(hba_lock);
static LIST_HEAD(hba_list);
-int transport_subsystem_register(struct se_subsystem_api *sub_api)
-{
- struct se_subsystem_api *s;
-
- INIT_LIST_HEAD(&sub_api->sub_api_list);
- mutex_lock(&subsystem_mutex);
- list_for_each_entry(s, &subsystem_list, sub_api_list) {
- if (!strcmp(s->name, sub_api->name)) {
- pr_err("%p is already registered with"
- " duplicate name %s, unable to process"
- " request\n", s, s->name);
- mutex_unlock(&subsystem_mutex);
+int transport_backend_register(const struct target_backend_ops *ops)
+{
+ struct target_backend *tb, *old;
+
+ tb = kzalloc(sizeof(*tb), GFP_KERNEL);
+ if (!tb)
+ return -ENOMEM;
+ tb->ops = ops;
+
+ mutex_lock(&backend_mutex);
+ list_for_each_entry(old, &backend_list, list) {
+ if (!strcmp(old->ops->name, ops->name)) {
+ pr_err("backend %s already registered.\n", ops->name);
+ mutex_unlock(&backend_mutex);
+ kfree(tb);
return -EEXIST;
}
}
- list_add_tail(&sub_api->sub_api_list, &subsystem_list);
- mutex_unlock(&subsystem_mutex);
+ target_setup_backend_cits(tb);
+ list_add_tail(&tb->list, &backend_list);
+ mutex_unlock(&backend_mutex);
- pr_debug("TCM: Registered subsystem plugin: %s struct module:"
- " %p\n", sub_api->name, sub_api->owner);
+ pr_debug("TCM: Registered subsystem plugin: %s struct module: %p\n",
+ ops->name, ops->owner);
return 0;
}
-EXPORT_SYMBOL(transport_subsystem_register);
+EXPORT_SYMBOL(transport_backend_register);
-void transport_subsystem_release(struct se_subsystem_api *sub_api)
+void target_backend_unregister(const struct target_backend_ops *ops)
{
- mutex_lock(&subsystem_mutex);
- list_del(&sub_api->sub_api_list);
- mutex_unlock(&subsystem_mutex);
+ struct target_backend *tb;
+
+ mutex_lock(&backend_mutex);
+ list_for_each_entry(tb, &backend_list, list) {
+ if (tb->ops == ops) {
+ list_del(&tb->list);
+ kfree(tb);
+ break;
+ }
+ }
+ mutex_unlock(&backend_mutex);
}
-EXPORT_SYMBOL(transport_subsystem_release);
+EXPORT_SYMBOL(target_backend_unregister);
-static struct se_subsystem_api *core_get_backend(const char *sub_name)
+static struct target_backend *core_get_backend(const char *name)
{
- struct se_subsystem_api *s;
+ struct target_backend *tb;
- mutex_lock(&subsystem_mutex);
- list_for_each_entry(s, &subsystem_list, sub_api_list) {
- if (!strcmp(s->name, sub_name))
+ mutex_lock(&backend_mutex);
+ list_for_each_entry(tb, &backend_list, list) {
+ if (!strcmp(tb->ops->name, name))
goto found;
}
- mutex_unlock(&subsystem_mutex);
+ mutex_unlock(&backend_mutex);
return NULL;
found:
- if (s->owner && !try_module_get(s->owner))
- s = NULL;
- mutex_unlock(&subsystem_mutex);
- return s;
+ if (tb->ops->owner && !try_module_get(tb->ops->owner))
+ tb = NULL;
+ mutex_unlock(&backend_mutex);
+ return tb;
}
struct se_hba *
@@ -116,13 +128,13 @@ core_alloc_hba(const char *plugin_name, u32 plugin_dep_id, u32 hba_flags)
hba->hba_index = scsi_get_new_index(SCSI_INST_INDEX);
hba->hba_flags |= hba_flags;
- hba->transport = core_get_backend(plugin_name);
- if (!hba->transport) {
+ hba->backend = core_get_backend(plugin_name);
+ if (!hba->backend) {
ret = -EINVAL;
goto out_free_hba;
}
- ret = hba->transport->attach_hba(hba, plugin_dep_id);
+ ret = hba->backend->ops->attach_hba(hba, plugin_dep_id);
if (ret < 0)
goto out_module_put;
@@ -137,8 +149,8 @@ core_alloc_hba(const char *plugin_name, u32 plugin_dep_id, u32 hba_flags)
return hba;
out_module_put:
- module_put(hba->transport->owner);
- hba->transport = NULL;
+ module_put(hba->backend->ops->owner);
+ hba->backend = NULL;
out_free_hba:
kfree(hba);
return ERR_PTR(ret);
@@ -149,7 +161,7 @@ core_delete_hba(struct se_hba *hba)
{
WARN_ON(hba->dev_count);
- hba->transport->detach_hba(hba);
+ hba->backend->ops->detach_hba(hba);
spin_lock(&hba_lock);
list_del(&hba->hba_node);
@@ -158,9 +170,9 @@ core_delete_hba(struct se_hba *hba)
pr_debug("CORE_HBA[%d] - Detached HBA from Generic Target"
" Core\n", hba->hba_id);
- module_put(hba->transport->owner);
+ module_put(hba->backend->ops->owner);
- hba->transport = NULL;
+ hba->backend = NULL;
kfree(hba);
return 0;
}