add new transport type ISCSI_TCP_CXGB4.
This transport has following features
1. TCP/IP offload.
2. iSCSI PDU recovery by reassembling
TCP segments.
3. Header and Data digest offload.
4. iSCSI segmentation offload(ISO).
5. Direct Data Placement(DDP).
Signed-off-by: Varun Prakash <va...@chelsio.com>
---
drivers/target/iscsi/iscsi_target_configfs.c | 79 ++++++++++++++++++++++++++++
include/target/iscsi/iscsi_target_core.h | 1 +
2 files changed, 80 insertions(+)
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c
b/drivers/target/iscsi/iscsi_target_configfs.c
index 2f821de..e09c891 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -182,12 +182,91 @@ out:
return rc;
}
+static ssize_t lio_target_np_cxgb4_show(struct config_item *item, char *page)
+{
+ struct iscsi_tpg_np *tpg_np = to_iscsi_tpg_np(item);
+ struct iscsi_tpg_np *tpg_np_cxgb4;
+ ssize_t rb;
+
+ tpg_np_cxgb4 = iscsit_tpg_locate_child_np(tpg_np, ISCSI_TCP_CXGB4);
+ if (tpg_np_cxgb4)
+ rb = sprintf(page, "1\n");
+ else
+ rb = sprintf(page, "0\n");
+
+ return rb;
+}
+
+static ssize_t lio_target_np_cxgb4_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_cxgb4 = 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) {
+ rc = request_module("cxgbit");
+ if (rc != 0) {
+ pr_warn("Unable to request_module for cxgbit\n");
+ rc = 0;
+ }
+
+ tpg_np_cxgb4 = iscsit_tpg_add_network_portal(tpg,
+ &np->np_sockaddr,
+ tpg_np,
+ ISCSI_TCP_CXGB4);
+ if (IS_ERR(tpg_np_cxgb4)) {
+ rc = PTR_ERR(tpg_np_cxgb4);
+ goto out;
+ }
+ } else {
+ tpg_np_cxgb4 = iscsit_tpg_locate_child_np(tpg_np,
+ ISCSI_TCP_CXGB4);
+ if (tpg_np_cxgb4) {
+ rc = iscsit_tpg_del_network_portal(tpg, tpg_np_cxgb4);
+ 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_, cxgb4);
static struct configfs_attribute *lio_target_portal_attrs[] = {
&lio_target_np_attr_sctp,
&lio_target_np_attr_iser,
+ &lio_target_np_attr_cxgb4,
NULL,
};
diff --git a/include/target/iscsi/iscsi_target_core.h
b/include/target/iscsi/iscsi_target_core.h
index 373d334..0edf18b 100644
--- a/include/target/iscsi/iscsi_target_core.h
+++ b/include/target/iscsi/iscsi_target_core.h
@@ -74,6 +74,7 @@ enum iscsit_transport_type {
ISCSI_IWARP_TCP = 3,
ISCSI_IWARP_SCTP = 4,
ISCSI_INFINIBAND = 5,
+ ISCSI_TCP_CXGB4 = 6,
};
/* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */
--
2.0.2
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