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03465c3c14
Issue: possible buffer overrun with sprintf() Fix: Use scnprintf() instead of sprintf() Bug 2715372 Change-Id: Ie3564bc41831ed8acf5b40d8a9f5a12e65cdc98a Signed-off-by: Mahesh Patil <maheshp@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/2240400 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Bhadram Varka <vbhadram@nvidia.com> Reviewed-by: Narayan Reddy <narayanr@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: Ashutosh Jha <ajha@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/*
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* Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "ether_linux.h"
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/**
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* @brief Shows the current setting of MAC loopback
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*
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* Algorithm: Display the current MAC loopback setting.
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*
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* @param[in] dev: Device data.
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* @param[in] attr: Device attribute
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* @param[in] buf: Buffer to store the current MAC loopback setting
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*
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* @note MAC and PHY need to be initialized.
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*/
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static ssize_t ether_mac_loopback_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct net_device *ndev = (struct net_device *)dev_get_drvdata(dev);
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struct ether_priv_data *pdata = netdev_priv(ndev);
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return scnprintf(buf, PAGE_SIZE, "%s\n",
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(pdata->mac_loopback_mode == 1U) ?
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"enabled" : "disabled");
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}
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/**
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* @brief Set the user setting of MAC loopback mode
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*
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* Algorithm: This is used to set the user mode settings of MAC loopback.
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*
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* @param[in] dev: Device data.
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* @param[in] attr: Device attribute
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* @param[in] buf: Buffer which contains the user settings of MAC loopback
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* @param[in] size: size of buffer
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*
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* @note MAC and PHY need to be initialized.
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*
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* @return size of buffer.
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*/
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static ssize_t ether_mac_loopback_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t size)
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{
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struct net_device *ndev = (struct net_device *)dev_get_drvdata(dev);
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struct ether_priv_data *pdata = netdev_priv(ndev);
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int ret = -1;
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/* Interface is not up so LB mode can't be set */
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if (!netif_running(ndev)) {
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dev_err(pdata->dev, "Not Allowed. Ether interface is not up\n");
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return size;
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}
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if (strncmp(buf, "enable", 6) == 0U) {
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netif_carrier_on(ndev);
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/* Enabling the MAC Loopback Mode */
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ret = osi_config_mac_loopback(pdata->osi_core, OSI_ENABLE);
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if (ret < 0) {
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dev_err(pdata->dev, "Enabling MAC Loopback failed\n");
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} else {
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pdata->mac_loopback_mode = 1;
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dev_info(pdata->dev, "Enabling MAC Loopback\n");
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}
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} else if (strncmp(buf, "disable", 7) == 0U) {
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netif_carrier_off(ndev);
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/* Disabling the MAC Loopback Mode */
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ret = osi_config_mac_loopback(pdata->osi_core, OSI_DISABLE);
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if (ret < 0) {
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dev_err(pdata->dev, "Disabling MAC Loopback failed\n");
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} else {
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pdata->mac_loopback_mode = 0;
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dev_info(pdata->dev, "Disabling MAC Loopback\n");
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}
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} else {
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dev_err(pdata->dev,
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"Invalid entry. Valid Entries are enable or disable\n");
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}
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return size;
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}
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/**
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* @brief Sysfs attribute for MAC loopback
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*
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*/
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static DEVICE_ATTR(mac_loopback, (S_IRUGO | S_IWUSR),
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ether_mac_loopback_show,
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ether_mac_loopback_store);
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/**
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* @brief Attributes for nvethernet sysfs
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*/
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static struct attribute *ether_sysfs_attrs[] = {
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&dev_attr_mac_loopback.attr,
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NULL
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};
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/**
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* @brief Ethernet sysfs attribute group
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*/
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static struct attribute_group ether_attribute_group = {
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.name = "nvethernet",
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.attrs = ether_sysfs_attrs,
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};
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int ether_sysfs_register(struct device *dev)
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{
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/* Create nvethernet sysfs group under /sys/devices/<ether_device>/ */
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return sysfs_create_group(&dev->kobj, ðer_attribute_group);
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}
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void ether_sysfs_unregister(struct device *dev)
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{
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/* Remove nvethernet sysfs group under /sys/devices/<ether_device>/ */
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sysfs_remove_group(&dev->kobj, ðer_attribute_group);
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}
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