1 files changed, 186 insertions, 1 deletions

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 2673a11a9495..7e6e031cc41b 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -1287,13 +1287,18 @@ iscsi_session_setup(struct iscsi_transport *iscsit,
         if (scsi_add_host(shost, NULL))
                 goto add_host_fail;
 
+        if (!try_module_get(iscsit->owner))
+                goto cls_session_fail;
+
         cls_session = iscsi_create_session(shost, iscsit, 0);
         if (!cls_session)
-                goto cls_session_fail;
+                goto module_put;
         *(unsigned long*)shost->hostdata = (unsigned long)cls_session;
 
         return cls_session;
 
+module_put:
+        module_put(iscsit->owner);
 cls_session_fail:
         scsi_remove_host(shost);
 add_host_fail:
@@ -1325,6 +1330,7 @@ void iscsi_session_teardown(struct iscsi_cls_session *cls_session)
 
         iscsi_destroy_session(cls_session);
         scsi_host_put(shost);
+        module_put(cls_session->transport->owner);
 }
 EXPORT_SYMBOL_GPL(iscsi_session_teardown);
 
@@ -1697,6 +1703,185 @@ int iscsi_conn_bind(struct iscsi_cls_session *cls_session,
 }
 EXPORT_SYMBOL_GPL(iscsi_conn_bind);
 
+
+int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
+                    enum iscsi_param param, char *buf, int buflen)
+{
+        struct iscsi_conn *conn = cls_conn->dd_data;
+        struct iscsi_session *session = conn->session;
+        uint32_t value;
+
+        switch(param) {
+        case ISCSI_PARAM_MAX_RECV_DLENGTH:
+                sscanf(buf, "%d", &conn->max_recv_dlength);
+                break;
+        case ISCSI_PARAM_MAX_XMIT_DLENGTH:
+                sscanf(buf, "%d", &conn->max_xmit_dlength);
+                break;
+        case ISCSI_PARAM_HDRDGST_EN:
+                sscanf(buf, "%d", &conn->hdrdgst_en);
+                break;
+        case ISCSI_PARAM_DATADGST_EN:
+                sscanf(buf, "%d", &conn->datadgst_en);
+                break;
+        case ISCSI_PARAM_INITIAL_R2T_EN:
+                sscanf(buf, "%d", &session->initial_r2t_en);
+                break;
+        case ISCSI_PARAM_MAX_R2T:
+                sscanf(buf, "%d", &session->max_r2t);
+                break;
+        case ISCSI_PARAM_IMM_DATA_EN:
+                sscanf(buf, "%d", &session->imm_data_en);
+                break;
+        case ISCSI_PARAM_FIRST_BURST:
+                sscanf(buf, "%d", &session->first_burst);
+                break;
+        case ISCSI_PARAM_MAX_BURST:
+                sscanf(buf, "%d", &session->max_burst);
+                break;
+        case ISCSI_PARAM_PDU_INORDER_EN:
+                sscanf(buf, "%d", &session->pdu_inorder_en);
+                break;
+        case ISCSI_PARAM_DATASEQ_INORDER_EN:
+                sscanf(buf, "%d", &session->dataseq_inorder_en);
+                break;
+        case ISCSI_PARAM_ERL:
+                sscanf(buf, "%d", &session->erl);
+                break;
+        case ISCSI_PARAM_IFMARKER_EN:
+                sscanf(buf, "%d", &value);
+                BUG_ON(value);
+                break;
+        case ISCSI_PARAM_OFMARKER_EN:
+                sscanf(buf, "%d", &value);
+                BUG_ON(value);
+                break;
+        case ISCSI_PARAM_EXP_STATSN:
+                sscanf(buf, "%u", &conn->exp_statsn);
+                break;
+        case ISCSI_PARAM_TARGET_NAME:
+                /* this should not change between logins */
+                if (session->targetname)
+                        break;
+
+                session->targetname = kstrdup(buf, GFP_KERNEL);
+                if (!session->targetname)
+                        return -ENOMEM;
+                break;
+        case ISCSI_PARAM_TPGT:
+                sscanf(buf, "%d", &session->tpgt);
+                break;
+        case ISCSI_PARAM_PERSISTENT_PORT:
+                sscanf(buf, "%d", &conn->persistent_port);
+                break;
+        case ISCSI_PARAM_PERSISTENT_ADDRESS:
+                /*
+                 * this is the address returned in discovery so it should
+                 * not change between logins.
+                 */
+                if (conn->persistent_address)
+                        break;
+
+                conn->persistent_address = kstrdup(buf, GFP_KERNEL);
+                if (!conn->persistent_address)
+                        return -ENOMEM;
+                break;
+        default:
+                return -ENOSYS;
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(iscsi_set_param);
+
+int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
+                            enum iscsi_param param, char *buf)
+{
+        struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+        struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+        int len;
+
+        switch(param) {
+        case ISCSI_PARAM_INITIAL_R2T_EN:
+                len = sprintf(buf, "%d\n", session->initial_r2t_en);
+                break;
+        case ISCSI_PARAM_MAX_R2T:
+                len = sprintf(buf, "%hu\n", session->max_r2t);
+                break;
+        case ISCSI_PARAM_IMM_DATA_EN:
+                len = sprintf(buf, "%d\n", session->imm_data_en);
+                break;
+        case ISCSI_PARAM_FIRST_BURST:
+                len = sprintf(buf, "%u\n", session->first_burst);
+                break;
+        case ISCSI_PARAM_MAX_BURST:
+                len = sprintf(buf, "%u\n", session->max_burst);
+                break;
+        case ISCSI_PARAM_PDU_INORDER_EN:
+                len = sprintf(buf, "%d\n", session->pdu_inorder_en);
+                break;
+        case ISCSI_PARAM_DATASEQ_INORDER_EN:
+                len = sprintf(buf, "%d\n", session->dataseq_inorder_en);
+                break;
+        case ISCSI_PARAM_ERL:
+                len = sprintf(buf, "%d\n", session->erl);
+                break;
+        case ISCSI_PARAM_TARGET_NAME:
+                len = sprintf(buf, "%s\n", session->targetname);
+                break;
+        case ISCSI_PARAM_TPGT:
+                len = sprintf(buf, "%d\n", session->tpgt);
+                break;
+        default:
+                return -ENOSYS;
+        }
+
+        return len;
+}
+EXPORT_SYMBOL_GPL(iscsi_session_get_param);
+
+int iscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
+                         enum iscsi_param param, char *buf)
+{
+        struct iscsi_conn *conn = cls_conn->dd_data;
+        int len;
+
+        switch(param) {
+        case ISCSI_PARAM_MAX_RECV_DLENGTH:
+                len = sprintf(buf, "%u\n", conn->max_recv_dlength);
+                break;
+        case ISCSI_PARAM_MAX_XMIT_DLENGTH:
+                len = sprintf(buf, "%u\n", conn->max_xmit_dlength);
+                break;
+        case ISCSI_PARAM_HDRDGST_EN:
+                len = sprintf(buf, "%d\n", conn->hdrdgst_en);
+                break;
+        case ISCSI_PARAM_DATADGST_EN:
+                len = sprintf(buf, "%d\n", conn->datadgst_en);
+                break;
+        case ISCSI_PARAM_IFMARKER_EN:
+                len = sprintf(buf, "%d\n", conn->ifmarker_en);
+                break;
+        case ISCSI_PARAM_OFMARKER_EN:
+                len = sprintf(buf, "%d\n", conn->ofmarker_en);
+                break;
+        case ISCSI_PARAM_EXP_STATSN:
+                len = sprintf(buf, "%u\n", conn->exp_statsn);
+                break;
+        case ISCSI_PARAM_PERSISTENT_PORT:
+                len = sprintf(buf, "%d\n", conn->persistent_port);
+                break;
+        case ISCSI_PARAM_PERSISTENT_ADDRESS:
+                len = sprintf(buf, "%s\n", conn->persistent_address);
+                break;
+        default:
+                return -ENOSYS;
+        }
+
+        return len;
+}
+EXPORT_SYMBOL_GPL(iscsi_conn_get_param);
+
 MODULE_AUTHOR("Mike Christie");
 MODULE_DESCRIPTION("iSCSI library functions");
 MODULE_LICENSE("GPL");