netdev - [patch net-next RFC 3/3] net: export physical port id via sysfs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1373908027-25800-4-git-send-email-jiri@resnulli.us>
Date:	Mon, 15 Jul 2013 19:07:07 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	netdev@...r.kernel.org
Cc:	Narendra_K@...l.com, bhutchings@...arflare.com,
	john.r.fastabend@...el.com
Subject: [patch net-next RFC 3/3] net: export physical port id via sysfs

Signed-off-by: Jiri Pirko <jiri@...nulli.us>
---
 net/core/net-sysfs.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 981fed3..fb19ede 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -334,6 +334,46 @@ static ssize_t store_group(struct device *dev, struct device_attribute *attr,
 	return netdev_store(dev, attr, buf, len, change_group);
 }
 
+static size_t _format_port_id(char *buf, int buflen,
+			      const unsigned char *id, int len)
+{
+	int i;
+	char *cp = buf;
+
+	for (i = 0; i < len; i++)
+		cp += scnprintf(cp, buflen - (cp - buf), "%02x", id[i]);
+	return cp - buf;
+}
+
+ssize_t sysfs_format_port_id(char *buf, const unsigned char *id, int len)
+{
+	size_t l;
+
+	l = _format_port_id(buf, PAGE_SIZE, id, len);
+	l += scnprintf(buf + l, PAGE_SIZE - l, "\n");
+	return (ssize_t)l;
+}
+static ssize_t show_phys_port_id(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct net_device *netdev = to_net_dev(dev);
+	ssize_t ret = 0;
+
+	if (!rtnl_trylock())
+		return restart_syscall();
+
+	if (dev_isalive(netdev) && netdev->netdev_ops->ndo_get_phys_port_id) {
+		struct netdev_phys_port_id ppid;
+
+		ret = netdev->netdev_ops->ndo_get_phys_port_id(netdev, &ppid);
+		if (!ret)
+			ret = sysfs_format_port_id(buf, ppid.id, ppid.id_len);
+	}
+	rtnl_unlock();
+
+	return ret;
+}
+
 static struct device_attribute net_class_attributes[] = {
 	__ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL),
 	__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
@@ -355,6 +395,7 @@ static struct device_attribute net_class_attributes[] = {
 	__ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
 	       store_tx_queue_len),
 	__ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group),
+	__ATTR(phys_port_id, S_IRUGO, show_phys_port_id, NULL),
 	{}
 };
 
-- 
1.8.1.4

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html