target: simplify the target template registration API
Instead of calling target_fabric_configfs_init() +
target_fabric_configfs_register() / target_fabric_configfs_deregister()
target_fabric_configfs_free() from every target driver, rewrite the API
so that we have simple register/unregister functions that operate on
a const operations vector.
This patch also fixes a memory leak in several target drivers. Several
target drivers namely called target_fabric_configfs_deregister()
without calling target_fabric_configfs_free().
A large part of this patch is based on earlier changes from
Bart Van Assche <bart.vanassche@sandisk.com>.
(v2: Add a new TF_CIT_SETUP_DRV macro so that the core configfs code
can declare attributes as either core only or for drivers)
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
index 843b53b..acf54cd 100644
--- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c
+++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
@@ -53,9 +53,8 @@
static struct workqueue_struct *tcm_qla2xxx_free_wq;
static struct workqueue_struct *tcm_qla2xxx_cmd_wq;
-/* Local pointer to allocated TCM configfs fabric module */
-static struct target_fabric_configfs *tcm_qla2xxx_fabric_configfs;
-static struct target_fabric_configfs *tcm_qla2xxx_npiv_fabric_configfs;
+static const struct target_core_fabric_ops tcm_qla2xxx_ops;
+static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops;
/*
* Parse WWN.
@@ -1177,7 +1176,7 @@
tpg->tpg_attrib.cache_dynamic_acls = 1;
tpg->tpg_attrib.demo_mode_login_only = 1;
- ret = core_tpg_register(&tcm_qla2xxx_fabric_configfs->tf_ops, wwn,
+ ret = core_tpg_register(&tcm_qla2xxx_ops, wwn,
&tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
if (ret < 0) {
kfree(tpg);
@@ -1297,7 +1296,7 @@
tpg->tpg_attrib.cache_dynamic_acls = 1;
tpg->tpg_attrib.demo_mode_login_only = 1;
- ret = core_tpg_register(&tcm_qla2xxx_npiv_fabric_configfs->tf_ops, wwn,
+ ret = core_tpg_register(&tcm_qla2xxx_npiv_ops, wwn,
&tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
if (ret < 0) {
kfree(tpg);
@@ -1987,7 +1986,9 @@
NULL,
};
-static struct target_core_fabric_ops tcm_qla2xxx_ops = {
+static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
+ .module = THIS_MODULE,
+ .name = "qla2xxx",
.get_fabric_name = tcm_qla2xxx_get_fabric_name,
.get_fabric_proto_ident = tcm_qla2xxx_get_fabric_proto_ident,
.tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn,
@@ -2037,9 +2038,15 @@
.fabric_drop_np = NULL,
.fabric_make_nodeacl = tcm_qla2xxx_make_nodeacl,
.fabric_drop_nodeacl = tcm_qla2xxx_drop_nodeacl,
+
+ .tfc_wwn_attrs = tcm_qla2xxx_wwn_attrs,
+ .tfc_tpg_base_attrs = tcm_qla2xxx_tpg_attrs,
+ .tfc_tpg_attrib_attrs = tcm_qla2xxx_tpg_attrib_attrs,
};
-static struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
+static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
+ .module = THIS_MODULE,
+ .name = "qla2xxx_npiv",
.get_fabric_name = tcm_qla2xxx_npiv_get_fabric_name,
.get_fabric_proto_ident = tcm_qla2xxx_get_fabric_proto_ident,
.tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn,
@@ -2087,94 +2094,26 @@
.fabric_drop_np = NULL,
.fabric_make_nodeacl = tcm_qla2xxx_make_nodeacl,
.fabric_drop_nodeacl = tcm_qla2xxx_drop_nodeacl,
+
+ .tfc_wwn_attrs = tcm_qla2xxx_wwn_attrs,
+ .tfc_tpg_base_attrs = tcm_qla2xxx_npiv_tpg_attrs,
};
static int tcm_qla2xxx_register_configfs(void)
{
- struct target_fabric_configfs *fabric, *npiv_fabric;
int ret;
pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on "
UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
utsname()->machine);
- /*
- * Register the top level struct config_item_type with TCM core
- */
- fabric = target_fabric_configfs_init(THIS_MODULE, "qla2xxx");
- if (IS_ERR(fabric)) {
- pr_err("target_fabric_configfs_init() failed\n");
- return PTR_ERR(fabric);
- }
- /*
- * Setup fabric->tf_ops from our local tcm_qla2xxx_ops
- */
- fabric->tf_ops = tcm_qla2xxx_ops;
- /*
- * Setup default attribute lists for various fabric->tf_cit_tmpl
- */
- fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_qla2xxx_wwn_attrs;
- fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = tcm_qla2xxx_tpg_attrs;
- fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs =
- tcm_qla2xxx_tpg_attrib_attrs;
- fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL;
- fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL;
- fabric->tf_cit_tmpl.tfc_tpg_nacl_base_cit.ct_attrs = NULL;
- fabric->tf_cit_tmpl.tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
- fabric->tf_cit_tmpl.tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
- fabric->tf_cit_tmpl.tfc_tpg_nacl_param_cit.ct_attrs = NULL;
- /*
- * Register the fabric for use within TCM
- */
- ret = target_fabric_configfs_register(fabric);
- if (ret < 0) {
- pr_err("target_fabric_configfs_register() failed for TCM_QLA2XXX\n");
- return ret;
- }
- /*
- * Setup our local pointer to *fabric
- */
- tcm_qla2xxx_fabric_configfs = fabric;
- pr_debug("TCM_QLA2XXX[0] - Set fabric -> tcm_qla2xxx_fabric_configfs\n");
- /*
- * Register the top level struct config_item_type for NPIV with TCM core
- */
- npiv_fabric = target_fabric_configfs_init(THIS_MODULE, "qla2xxx_npiv");
- if (IS_ERR(npiv_fabric)) {
- pr_err("target_fabric_configfs_init() failed\n");
- ret = PTR_ERR(npiv_fabric);
+ ret = target_register_template(&tcm_qla2xxx_ops);
+ if (ret)
+ return ret;
+
+ ret = target_register_template(&tcm_qla2xxx_npiv_ops);
+ if (ret)
goto out_fabric;
- }
- /*
- * Setup fabric->tf_ops from our local tcm_qla2xxx_npiv_ops
- */
- npiv_fabric->tf_ops = tcm_qla2xxx_npiv_ops;
- /*
- * Setup default attribute lists for various npiv_fabric->tf_cit_tmpl
- */
- npiv_fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_qla2xxx_wwn_attrs;
- npiv_fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs =
- tcm_qla2xxx_npiv_tpg_attrs;
- npiv_fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL;
- npiv_fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL;
- npiv_fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL;
- npiv_fabric->tf_cit_tmpl.tfc_tpg_nacl_base_cit.ct_attrs = NULL;
- npiv_fabric->tf_cit_tmpl.tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
- npiv_fabric->tf_cit_tmpl.tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
- npiv_fabric->tf_cit_tmpl.tfc_tpg_nacl_param_cit.ct_attrs = NULL;
- /*
- * Register the npiv_fabric for use within TCM
- */
- ret = target_fabric_configfs_register(npiv_fabric);
- if (ret < 0) {
- pr_err("target_fabric_configfs_register() failed for TCM_QLA2XXX\n");
- goto out_fabric;
- }
- /*
- * Setup our local pointer to *npiv_fabric
- */
- tcm_qla2xxx_npiv_fabric_configfs = npiv_fabric;
- pr_debug("TCM_QLA2XXX[0] - Set fabric -> tcm_qla2xxx_npiv_fabric_configfs\n");
tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
WQ_MEM_RECLAIM, 0);
@@ -2194,9 +2133,9 @@
out_free_wq:
destroy_workqueue(tcm_qla2xxx_free_wq);
out_fabric_npiv:
- target_fabric_configfs_deregister(tcm_qla2xxx_npiv_fabric_configfs);
+ target_unregister_template(&tcm_qla2xxx_npiv_ops);
out_fabric:
- target_fabric_configfs_deregister(tcm_qla2xxx_fabric_configfs);
+ target_unregister_template(&tcm_qla2xxx_ops);
return ret;
}
@@ -2205,13 +2144,8 @@
destroy_workqueue(tcm_qla2xxx_cmd_wq);
destroy_workqueue(tcm_qla2xxx_free_wq);
- target_fabric_configfs_deregister(tcm_qla2xxx_fabric_configfs);
- tcm_qla2xxx_fabric_configfs = NULL;
- pr_debug("TCM_QLA2XXX[0] - Cleared tcm_qla2xxx_fabric_configfs\n");
-
- target_fabric_configfs_deregister(tcm_qla2xxx_npiv_fabric_configfs);
- tcm_qla2xxx_npiv_fabric_configfs = NULL;
- pr_debug("TCM_QLA2XXX[0] - Cleared tcm_qla2xxx_npiv_fabric_configfs\n");
+ target_unregister_template(&tcm_qla2xxx_ops);
+ target_unregister_template(&tcm_qla2xxx_npiv_ops);
}
static int __init tcm_qla2xxx_init(void)