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Commit 1c46960e authored by Varun Prakash's avatar Varun Prakash Committed by Nicholas Bellinger
Browse files

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: default avatarVarun Prakash <varun@chelsio.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 864e504a

drivers/target/iscsi/iscsi_target_configfs.c

+76 −0
Original line number Diff line number Diff line
@@ -182,12 +182,88 @@ static ssize_t lio_target_np_iser_store(struct config_item *item, 
	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,

};

include/target/iscsi/iscsi_target_core.h

+1 −0
Original line number Diff line number Diff line
@@ -74,6 +74,7 @@ enum iscsit_transport_type { 
	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 */