iscsi-target: add new offload transport type
Add new transport type ISCSI_HW_OFFLOAD,
hw offload transport drivers will use
this transport type.
Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index 97e5b69..3565e07 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -182,12 +182,88 @@
return rc;
}
+static ssize_t lio_target_np_hw_offload_show(struct config_item *item,
+ char *page)
+{
+ struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item);
+ struct iscsi_tpg_np *tpg_np_hw_offload;
+ ssize_t rb;
+
+ tpg_np_hw_offload = iscsit_tpg_locate_child_np(tpg_np,
+ ISCSI_HW_OFFLOAD);
+ if (tpg_np_hw_offload)
+ rb = sprintf(page, "1\n");
+ else
+ rb = sprintf(page, "0\n");
+
+ return rb;
+}
+
+static ssize_t lio_target_np_hw_offload_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item);
+ struct iscsi_np *np;
+ struct iscsi_portal_group *tpg;
+ struct iscsi_tpg_np *tpg_np_hw_offload = NULL;
+ u32 op;
+ int rc = 0;
+
+ rc = kstrtou32(page, 0, &op);
+ if (rc)
+ return rc;
+
+ if ((op != 1) && (op != 0)) {
+ pr_err("Illegal value for tpg_enable: %u\n", op);
+ return -EINVAL;
+ }
+
+ np = tpg_np->tpg_np;
+ if (!np) {
+ pr_err("Unable to locate struct iscsi_np from"
+ " struct iscsi_tpg_np\n");
+ return -EINVAL;
+ }
+
+ tpg = tpg_np->tpg;
+ if (iscsit_get_tpg(tpg) < 0)
+ return -EINVAL;
+
+ if (op) {
+ tpg_np_hw_offload = iscsit_tpg_add_network_portal(tpg,
+ &np->np_sockaddr, tpg_np, ISCSI_HW_OFFLOAD);
+
+ if (IS_ERR(tpg_np_hw_offload)) {
+ rc = PTR_ERR(tpg_np_hw_offload);
+ goto out;
+ }
+ } else {
+ tpg_np_hw_offload = iscsit_tpg_locate_child_np(tpg_np,
+ ISCSI_HW_OFFLOAD);
+
+ if (tpg_np_hw_offload) {
+ rc = iscsit_tpg_del_network_portal(tpg,
+ tpg_np_hw_offload);
+ if (rc < 0)
+ goto out;
+ }
+ }
+
+ iscsit_put_tpg(tpg);
+ return count;
+out:
+ iscsit_put_tpg(tpg);
+ return rc;
+}
+
CONFIGFS_ATTR(lio_target_np_, sctp);
CONFIGFS_ATTR(lio_target_np_, iser);
+CONFIGFS_ATTR(lio_target_np_, hw_offload);
static struct configfs_attribute *lio_target_portal_attrs[] = {
&lio_target_np_attr_sctp,
&lio_target_np_attr_iser,
+ &lio_target_np_attr_hw_offload,
NULL,
};
diff --git a/include/target/iscsi/iscsi_target_core.h b/include/target/iscsi/iscsi_target_core.h
index 01c41f2..110c1fd 100644
--- a/include/target/iscsi/iscsi_target_core.h
+++ b/include/target/iscsi/iscsi_target_core.h
@@ -74,6 +74,7 @@
ISCSI_IWARP_TCP = 3,
ISCSI_IWARP_SCTP = 4,
ISCSI_INFINIBAND = 5,
+ ISCSI_HW_OFFLOAD = 6,
};
/* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */