--- /dev/null
+/*
+ * u_ether_configfs.h
+ *
+ * Utility definitions for configfs support in USB Ethernet functions
+ *
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __U_ETHER_CONFIGFS_H
+#define __U_ETHER_CONFIGFS_H
+
+#define USB_ETHERNET_CONFIGFS_ITEM(_f_) \
+ CONFIGFS_ATTR_STRUCT(f_##_f_##_opts); \
+ CONFIGFS_ATTR_OPS(f_##_f_##_opts); \
+ \
+ static void _f_##_attr_release(struct config_item *item) \
+ { \
+ struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
+ \
+ usb_put_function_instance(&opts->func_inst); \
+ } \
+ \
+ static struct configfs_item_operations _f_##_item_ops = { \
+ .release = _f_##_attr_release, \
+ .show_attribute = f_##_f_##_opts_attr_show, \
+ .store_attribute = f_##_f_##_opts_attr_store, \
+ }
+
+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(_f_) \
+ static ssize_t _f_##_opts_dev_addr_show(struct f_##_f_##_opts *opts, \
+ char *page) \
+ { \
+ int result; \
+ \
+ mutex_lock(&opts->lock); \
+ result = gether_get_dev_addr(opts->net, page, PAGE_SIZE); \
+ mutex_unlock(&opts->lock); \
+ \
+ return result; \
+ } \
+ \
+ static ssize_t _f_##_opts_dev_addr_store(struct f_##_f_##_opts *opts, \
+ const char *page, size_t len)\
+ { \
+ int ret; \
+ \
+ mutex_lock(&opts->lock); \
+ if (opts->refcnt) { \
+ mutex_unlock(&opts->lock); \
+ return -EBUSY; \
+ } \
+ \
+ ret = gether_set_dev_addr(opts->net, page); \
+ mutex_unlock(&opts->lock); \
+ if (!ret) \
+ ret = len; \
+ return ret; \
+ } \
+ \
+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_dev_addr = \
+ __CONFIGFS_ATTR(dev_addr, S_IRUGO | S_IWUSR, \
+ _f_##_opts_dev_addr_show, \
+ _f_##_opts_dev_addr_store)
+
+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(_f_) \
+ static ssize_t _f_##_opts_host_addr_show(struct f_##_f_##_opts *opts, \
+ char *page) \
+ { \
+ int result; \
+ \
+ mutex_lock(&opts->lock); \
+ result = gether_get_host_addr(opts->net, page, PAGE_SIZE); \
+ mutex_unlock(&opts->lock); \
+ \
+ return result; \
+ } \
+ \
+ static ssize_t _f_##_opts_host_addr_store(struct f_##_f_##_opts *opts, \
+ const char *page, size_t len)\
+ { \
+ int ret; \
+ \
+ mutex_lock(&opts->lock); \
+ if (opts->refcnt) { \
+ mutex_unlock(&opts->lock); \
+ return -EBUSY; \
+ } \
+ \
+ ret = gether_set_host_addr(opts->net, page); \
+ mutex_unlock(&opts->lock); \
+ if (!ret) \
+ ret = len; \
+ return ret; \
+ } \
+ \
+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_host_addr = \
+ __CONFIGFS_ATTR(host_addr, S_IRUGO | S_IWUSR, \
+ _f_##_opts_host_addr_show, \
+ _f_##_opts_host_addr_store)
+
+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(_f_) \
+ static ssize_t _f_##_opts_qmult_show(struct f_##_f_##_opts *opts, \
+ char *page) \
+ { \
+ unsigned qmult; \
+ \
+ mutex_lock(&opts->lock); \
+ qmult = gether_get_qmult(opts->net); \
+ mutex_unlock(&opts->lock); \
+ return sprintf(page, "%d", qmult); \
+ } \
+ \
+ static ssize_t _f_##_opts_qmult_store(struct f_##_f_##_opts *opts, \
+ const char *page, size_t len)\
+ { \
+ u8 val; \
+ int ret; \
+ \
+ mutex_lock(&opts->lock); \
+ if (opts->refcnt) { \
+ ret = -EBUSY; \
+ goto out; \
+ } \
+ \
+ ret = kstrtou8(page, 0, &val); \
+ if (ret) \
+ goto out; \
+ \
+ gether_set_qmult(opts->net, val); \
+ ret = len; \
+out: \
+ mutex_unlock(&opts->lock); \
+ return ret; \
+ } \
+ \
+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_qmult = \
+ __CONFIGFS_ATTR(qmult, S_IRUGO | S_IWUSR, \
+ _f_##_opts_qmult_show, \
+ _f_##_opts_qmult_store)
+
+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(_f_) \
+ static ssize_t _f_##_opts_ifname_show(struct f_##_f_##_opts *opts, \
+ char *page) \
+ { \
+ int ret; \
+ \
+ mutex_lock(&opts->lock); \
+ ret = gether_get_ifname(opts->net, page, PAGE_SIZE); \
+ mutex_unlock(&opts->lock); \
+ \
+ return ret; \
+ } \
+ \
+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_ifname = \
+ __CONFIGFS_ATTR_RO(ifname, _f_##_opts_ifname_show)
+
+#endif /* __U_ETHER_CONFIGFS_H */
Code Review / kvmfornfv.git / blobdiff