[SCSI] libiscsi: add helper to convert addr to string

This adds a helper to convert a addr struct to
a string. This will be used by the drivers in
the next patches.

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

2 files changed, 43 insertions, 3 deletions

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index da8b61543ee4..0c550d5b9133 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -3352,6 +3352,47 @@ int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
 }
 EXPORT_SYMBOL_GPL(iscsi_session_get_param);
 
+int iscsi_conn_get_addr_param(struct sockaddr_storage *addr,
+                              enum iscsi_param param, char *buf)
+{
+        struct sockaddr_in6 *sin6 = NULL;
+        struct sockaddr_in *sin = NULL;
+        int len;
+
+        switch (addr->ss_family) {
+        case AF_INET:
+                sin = (struct sockaddr_in *)addr;
+                break;
+        case AF_INET6:
+                sin6 = (struct sockaddr_in6 *)addr;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        switch (param) {
+        case ISCSI_PARAM_CONN_ADDRESS:
+        case ISCSI_HOST_PARAM_IPADDRESS:
+                if (sin)
+                        len = sprintf(buf, "%pI4\n", &sin->sin_addr.s_addr);
+                else
+                        len = sprintf(buf, "%pI6\n", &sin6->sin6_addr);
+                break;
+        case ISCSI_PARAM_CONN_PORT:
+                if (sin)
+                        len = sprintf(buf, "%hu\n", be16_to_cpu(sin->sin_port));
+                else
+                        len = sprintf(buf, "%hu\n",
+                                      be16_to_cpu(sin6->sin6_port));
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        return len;
+}
+EXPORT_SYMBOL_GPL(iscsi_conn_get_addr_param);
+
 int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
                          enum iscsi_param param, char *buf)
 {
@@ -3416,9 +3457,6 @@ int iscsi_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param,
         case ISCSI_HOST_PARAM_INITIATOR_NAME:
                 len = sprintf(buf, "%s\n", ihost->initiatorname);
                 break;
-        case ISCSI_HOST_PARAM_IPADDRESS:
-                len = sprintf(buf, "%s\n", ihost->local_address);
-                break;
         default:
                 return -ENOSYS;
         }
diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index 748382b32b52..4bef19fb3a65 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -394,6 +394,8 @@ extern void iscsi_session_failure(struct iscsi_session *session,
                                   enum iscsi_err err);
 extern int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
                                 enum iscsi_param param, char *buf);
+extern int iscsi_conn_get_addr_param(struct sockaddr_storage *addr,
+                                     enum iscsi_param param, char *buf);
 extern void iscsi_suspend_tx(struct iscsi_conn *conn);
 extern void iscsi_suspend_queue(struct iscsi_conn *conn);
 extern void iscsi_conn_queue_work(struct iscsi_conn *conn);