linux-kernel - [PATCH 1/7] scsi/scsi_transport_iscsi: Add iface struct to kernel.

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Date:   Tue,  6 Jun 2017 12:07:11 -0600
From:   Robert LeBlanc <robert@...lancnet.us>
To:     lduncan@...e.com
Cc:     cleech@...hat.com, jejb@...ux.vnet.ibm.com,
        martin.petersen@...cle.com, open-iscsi@...glegroups.com,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        ogerlitz@...lanox.com, sagi@...mberg.me, roid@...lanox.com,
        dledford@...hat.com, sean.hefty@...el.com,
        hal.rosenstock@...il.com, linux-rdma@...r.kernel.org,
        subbu.seetharaman@...adcom.com, ketan.mukadam@...adcom.com,
        jitendra.bhivare@...adcom.com, QLogic-Storage-Upstream@...gic.com,
        varun@...lsio.com, Robert LeBlanc <robert@...lancnet.us>
Subject: [PATCH 1/7] scsi/scsi_transport_iscsi: Add iface struct to kernel.

Allow the userspace iscsiadm to pass the iface struct of the connection
so that the underlying driver can use what is most appropriate to create
the iSCSI connection.

Signed-off-by: Robert LeBlanc <robert@...lancnet.us>
---
 include/scsi/scsi_transport_iscsi.h | 95 +++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)

diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index 6183d20a01fb..26fe284daf9a 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -37,6 +37,7 @@ struct iscsi_cls_conn;
 struct iscsi_conn;
 struct iscsi_task;
 struct sockaddr;
+struct iface_rec;
 struct iscsi_iface;
 struct bsg_job;
 struct iscsi_bus_flash_session;
@@ -291,6 +292,100 @@ struct iscsi_endpoint {
 	struct iscsi_cls_conn *conn;
 };
 
+/* max len of interface */
+#define ISCSI_MAX_IFACE_LEN	65
+#define NI_MAXHOST 1025
+#define ISCSI_HWADDRESS_BUF_SIZE 18
+#define ISCSI_TRANSPORT_NAME_MAXLEN 16
+#define ISCSI_MAX_STR_LEN 80
+
+struct iface_rec {
+	struct list_head	list;
+	/* iscsi iface record name */
+	char			name[ISCSI_MAX_IFACE_LEN];
+	uint32_t		iface_num;
+	/* network layer iface name (eth0) */
+	char			netdev[IFNAMSIZ];
+	char			ipaddress[NI_MAXHOST];
+	char			subnet_mask[NI_MAXHOST];
+	char			gateway[NI_MAXHOST];
+	char			bootproto[ISCSI_MAX_STR_LEN];
+	char			ipv6_linklocal[NI_MAXHOST];
+	char			ipv6_router[NI_MAXHOST];
+	char			ipv6_autocfg[NI_MAXHOST];
+	char			linklocal_autocfg[NI_MAXHOST];
+	char			router_autocfg[NI_MAXHOST];
+	uint16_t		vlan_id;
+	uint8_t			vlan_priority;
+	char			vlan_state[ISCSI_MAX_STR_LEN];
+	char			state[ISCSI_MAX_STR_LEN]; /* 0 = disable,
+							   * 1 = enable */
+	uint16_t		mtu;
+	uint16_t		port;
+	char			delayed_ack[ISCSI_MAX_STR_LEN];
+	char			nagle[ISCSI_MAX_STR_LEN];
+	char			tcp_wsf_state[ISCSI_MAX_STR_LEN];
+	uint8_t			tcp_wsf;
+	uint8_t			tcp_timer_scale;
+	char			tcp_timestamp[ISCSI_MAX_STR_LEN];
+	char			dhcp_dns[ISCSI_MAX_STR_LEN];
+	char			dhcp_slp_da[ISCSI_MAX_STR_LEN];
+	char			tos_state[ISCSI_MAX_STR_LEN];
+	uint8_t			tos;
+	char			gratuitous_arp[ISCSI_MAX_STR_LEN];
+	char			dhcp_alt_client_id_state[ISCSI_MAX_STR_LEN];
+	char			dhcp_alt_client_id[ISCSI_MAX_STR_LEN];
+	char			dhcp_req_vendor_id_state[ISCSI_MAX_STR_LEN];
+	char			dhcp_vendor_id_state[ISCSI_MAX_STR_LEN];
+	char			dhcp_vendor_id[ISCSI_MAX_STR_LEN];
+	char			dhcp_learn_iqn[ISCSI_MAX_STR_LEN];
+	char			fragmentation[ISCSI_MAX_STR_LEN];
+	char			incoming_forwarding[ISCSI_MAX_STR_LEN];
+	uint8_t			ttl;
+	char			gratuitous_neighbor_adv[ISCSI_MAX_STR_LEN];
+	char			redirect[ISCSI_MAX_STR_LEN];
+	char			mld[ISCSI_MAX_STR_LEN];
+	uint32_t		flow_label;
+	uint32_t		traffic_class;
+	uint8_t			hop_limit;
+	uint32_t		nd_reachable_tmo;
+	uint32_t		nd_rexmit_time;
+	uint32_t		nd_stale_tmo;
+	uint8_t			dup_addr_detect_cnt;
+	uint32_t		router_adv_link_mtu;
+	uint16_t		def_task_mgmt_tmo;
+	char			header_digest[ISCSI_MAX_STR_LEN];
+	char			data_digest[ISCSI_MAX_STR_LEN];
+	char			immediate_data[ISCSI_MAX_STR_LEN];
+	char			initial_r2t[ISCSI_MAX_STR_LEN];
+	char			data_seq_inorder[ISCSI_MAX_STR_LEN];
+	char			data_pdu_inorder[ISCSI_MAX_STR_LEN];
+	uint8_t			erl;
+	uint32_t		max_recv_dlength;
+	uint32_t		first_burst_len;
+	uint16_t		max_out_r2t;
+	uint32_t		max_burst_len;
+	char			chap_auth[ISCSI_MAX_STR_LEN];
+	char			bidi_chap[ISCSI_MAX_STR_LEN];
+	char			strict_login_comp[ISCSI_MAX_STR_LEN];
+	char			discovery_auth[ISCSI_MAX_STR_LEN];
+	char			discovery_logout[ISCSI_MAX_STR_LEN];
+	char			port_state[ISCSI_MAX_STR_LEN];
+	char			port_speed[ISCSI_MAX_STR_LEN];
+	/*
+	 * TODO: we may have to make this bigger and interconnect
+	 * specific for infiniband
+	 */
+	char			hwaddress[ISCSI_HWADDRESS_BUF_SIZE];
+	char			transport_name[ISCSI_TRANSPORT_NAME_MAXLEN];
+	/*
+	 * This is only used for boot now, but the iser guys
+	 * can use this for their virtualization idea.
+	 */
+	char			alias[TARGET_NAME_MAXLEN + 1];
+	char			iname[TARGET_NAME_MAXLEN + 1];
+};
+
 struct iscsi_iface {
 	struct device dev;
 	struct iscsi_transport *transport;
-- 
2.11.0