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target: refactor node ACL allocation 

Split out two common helpers to share code for allocating and initializing
node ACLs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Christoph Hellwig 2015-04-13 19:51:15 +02:00 committed by Nicholas Bellinger
parent c7d6a80392
commit e413f47270
1 changed files with 57 additions and 78 deletions
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135
drivers/target/target_core_tpg.c
View File

@ -254,24 +254,12 @@ static int core_create_device_list_for_node(struct se_node_acl *nacl)
return 0;
}
/* core_tpg_check_initiator_node_acl()
*
*
*/
struct se_node_acl *core_tpg_check_initiator_node_acl(
struct se_portal_group *tpg,
unsigned char *initiatorname)
static struct se_node_acl *target_alloc_node_acl(struct se_portal_group *tpg,
const unsigned char *initiatorname)
{
struct se_node_acl *acl;
acl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
if (acl)
return acl;
if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg))
return NULL;
acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg);
acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg);
if (!acl)
return NULL;
@ -289,20 +277,60 @@ struct se_node_acl *core_tpg_check_initiator_node_acl(
snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
acl->se_tpg = tpg;
acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
acl->dynamic_node_acl = 1;
tpg->se_tpg_tfo->set_default_node_attributes(acl);
if (core_create_device_list_for_node(acl) < 0) {
tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
return NULL;
}
if (core_create_device_list_for_node(acl) < 0)
goto out_free_acl;
if (core_set_queue_depth_for_node(tpg, acl) < 0)
goto out_free_device_list;
if (core_set_queue_depth_for_node(tpg, acl) < 0) {
core_free_device_list_for_node(acl, tpg);
tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
return acl;
out_free_device_list:
core_free_device_list_for_node(acl, tpg);
out_free_acl:
tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
return NULL;
}
static void target_add_node_acl(struct se_node_acl *acl)
{
struct se_portal_group *tpg = acl->se_tpg;
spin_lock_irq(&tpg->acl_node_lock);
list_add_tail(&acl->acl_list, &tpg->acl_node_list);
tpg->num_node_acls++;
spin_unlock_irq(&tpg->acl_node_lock);
pr_debug("%s_TPG[%hu] - Added %s ACL with TCQ Depth: %d for %s"
" Initiator Node: %s\n",
tpg->se_tpg_tfo->get_fabric_name(),
tpg->se_tpg_tfo->tpg_get_tag(tpg),
acl->dynamic_node_acl ? "DYNAMIC" : "",
acl->queue_depth,
tpg->se_tpg_tfo->get_fabric_name(),
acl->initiatorname);
}
struct se_node_acl *core_tpg_check_initiator_node_acl(
struct se_portal_group *tpg,
unsigned char *initiatorname)
{
struct se_node_acl *acl;
acl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
if (acl)
return acl;
if (!tpg->se_tpg_tfo->tpg_check_demo_mode(tpg))
return NULL;
}
acl = target_alloc_node_acl(tpg, initiatorname);
if (!acl)
return NULL;
acl->dynamic_node_acl = 1;
/*
* Here we only create demo-mode MappedLUNs from the active
* TPG LUNs if the fabric is not explicitly asking for
@ -312,16 +340,7 @@ struct se_node_acl *core_tpg_check_initiator_node_acl(
(tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg) != 1))
core_tpg_add_node_to_devs(acl, tpg);
spin_lock_irq(&tpg->acl_node_lock);
list_add_tail(&acl->acl_list, &tpg->acl_node_list);
tpg->num_node_acls++;
spin_unlock_irq(&tpg->acl_node_lock);
pr_debug("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s"
" Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
target_add_node_acl(acl);
return acl;
}
EXPORT_SYMBOL(core_tpg_check_initiator_node_acl);
@ -368,7 +387,7 @@ struct se_node_acl *core_tpg_add_initiator_node_acl(
" for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname);
spin_unlock_irq(&tpg->acl_node_lock);
goto done;
return acl;
}
pr_err("ACL entry for %s Initiator"
@ -380,51 +399,11 @@ struct se_node_acl *core_tpg_add_initiator_node_acl(
}
spin_unlock_irq(&tpg->acl_node_lock);
acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg);
if (!acl) {
pr_err("struct se_node_acl pointer is NULL\n");
return ERR_PTR(-EINVAL);
}
INIT_LIST_HEAD(&acl->acl_list);
INIT_LIST_HEAD(&acl->acl_sess_list);
kref_init(&acl->acl_kref);
init_completion(&acl->acl_free_comp);
spin_lock_init(&acl->device_list_lock);
spin_lock_init(&acl->nacl_sess_lock);
atomic_set(&acl->acl_pr_ref_count, 0);
if (tpg->se_tpg_tfo->tpg_get_default_depth)
acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg);
else
acl->queue_depth = 1;
snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
acl->se_tpg = tpg;
acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
tpg->se_tpg_tfo->set_default_node_attributes(acl);
if (core_create_device_list_for_node(acl) < 0) {
tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
acl = target_alloc_node_acl(tpg, initiatorname);
if (!acl)
return ERR_PTR(-ENOMEM);
}
if (core_set_queue_depth_for_node(tpg, acl) < 0) {
core_free_device_list_for_node(acl, tpg);
tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
return ERR_PTR(-EINVAL);
}
spin_lock_irq(&tpg->acl_node_lock);
list_add_tail(&acl->acl_list, &tpg->acl_node_list);
tpg->num_node_acls++;
spin_unlock_irq(&tpg->acl_node_lock);
done:
pr_debug("%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s"
" Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
target_add_node_acl(acl);
return acl;
}