[SCSI] iscsi_transport: export hw address

Add hw address sysfs file.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 4fbd8e1..1ba98d2 100644 (file)
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -32,7 +32,7 @@
 
 #define ISCSI_SESSION_ATTRS 11
 #define ISCSI_CONN_ATTRS 11
-#define ISCSI_HOST_ATTRS 0
+#define ISCSI_HOST_ATTRS 1
 #define ISCSI_TRANSPORT_VERSION "2.0-724"
 
 struct iscsi_internal {
@@ -1197,6 +1197,25 @@ static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \
                        NULL)
 iscsi_priv_session_attr(recovery_tmo, "%d");
 
+/*
+ * iSCSI host attrs
+ */
+#define iscsi_host_attr_show(param)                                    \
+static ssize_t                                                         \
+show_host_param_##param(struct class_device *cdev, char *buf)          \
+{                                                                      \
+       struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
+       struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
+       return priv->iscsi_transport->get_host_param(shost, param, buf); \
+}
+
+#define iscsi_host_attr(field, param)                                  \
+       iscsi_host_attr_show(param)                                     \
+static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
+                       NULL);
+
+iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
+
 #define SETUP_PRIV_SESSION_RD_ATTR(field)                              \
 do {                                                                   \
        priv->session_attrs[count] = &class_device_attr_priv_sess_##field; \
@@ -1220,6 +1239,14 @@ do {                                                                     \
        }                                                               \
 } while (0)
 
+#define SETUP_HOST_RD_ATTR(field, param_flag)                          \
+do {                                                                   \
+       if (tt->host_param_mask & param_flag) {                         \
+               priv->host_attrs[count] = &class_device_attr_host_##field; \
+               count++;                                                \
+       }                                                               \
+} while (0)
+
 static int iscsi_session_match(struct attribute_container *cont,
                           struct device *dev)
 {
@@ -1321,9 +1348,13 @@ iscsi_register_transport(struct iscsi_transport *tt)
        priv->t.host_attrs.ac.class = &iscsi_host_class.class;
        priv->t.host_attrs.ac.match = iscsi_host_match;
        priv->t.host_size = sizeof(struct iscsi_host);
-       priv->host_attrs[0] = NULL;
        transport_container_register(&priv->t.host_attrs);
 
+       SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS);
+       BUG_ON(count > ISCSI_HOST_ATTRS);
+       priv->host_attrs[count] = NULL;
+       count = 0;
+
        /* connection parameters */
        priv->conn_cont.ac.attrs = &priv->conn_attrs[0];
        priv->conn_cont.ac.class = &iscsi_connection_class.class;

diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index 55ebf03..fba2117 100644 (file)
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -250,6 +250,14 @@ enum iscsi_param {
 #define ISCSI_CONN_PORT                        (1 << ISCSI_PARAM_CONN_PORT)
 #define ISCSI_CONN_ADDRESS             (1 << ISCSI_PARAM_CONN_ADDRESS)
 
+/* iSCSI HBA params */
+enum iscsi_host_param {
+       ISCSI_HOST_PARAM_HWADDRESS,
+       ISCSI_HOST_PARAM_MAX,
+};
+
+#define ISCSI_HOST_HWADDRESS           (1 << ISCSI_HOST_PARAM_HWADDRESS)
+
 #define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
 #define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
 #define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))

diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index d5c218d..e962c53 100644 (file)
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -79,7 +79,8 @@ struct iscsi_transport {
        char *name;
        unsigned int caps;
        /* LLD sets this to indicate what values it can export to sysfs */
-       unsigned int param_mask;
+       uint64_t param_mask;
+       uint64_t host_param_mask;
        struct scsi_host_template *host_template;
        /* LLD connection data size */
        int conndata_size;
@@ -105,6 +106,8 @@ struct iscsi_transport {
                               enum iscsi_param param, char *buf);
        int (*get_session_param) (struct iscsi_cls_session *session,
                                  enum iscsi_param param, char *buf);
+       int (*get_host_param) (struct Scsi_Host *shost,
+                               enum iscsi_host_param param, char *buf);
        int (*send_pdu) (struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
                         char *data, uint32_t data_size);
        void (*get_stats) (struct iscsi_cls_conn *conn,