Release 4.11 net/core/net-sysfs.c

/*
 * net-sysfs.c - network device class and attributes
 *
 * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org>
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

#include <linux/capability.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <net/switchdev.h>
#include <linux/if_arp.h>
#include <linux/slab.h>
#include <linux/sched/signal.h>
#include <linux/nsproxy.h>
#include <net/sock.h>
#include <net/net_namespace.h>
#include <linux/rtnetlink.h>
#include <linux/vmalloc.h>
#include <linux/export.h>
#include <linux/jiffies.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_net.h>

#include "net-sysfs.h"

#ifdef CONFIG_SYSFS

static const char fmt_hex[] = "%#x\n";

static const char fmt_dec[] = "%d\n";

static const char fmt_ulong[] = "%lu\n";

static const char fmt_u64[] = "%llu\n";



static inline int dev_isalive(const struct net_device *dev)
{
	return dev->reg_state <= NETREG_REGISTERED;
}

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Stephen Hemminger
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/* use same locking rules as GIF* ioctl's */


static ssize_t netdev_show(const struct device *dev,
			   struct device_attribute *attr, char *buf,
			   ssize_t (*format)(const struct net_device *, char *))
{
	struct net_device *ndev = to_net_dev(dev);
	ssize_t ret = -EINVAL;

	read_lock(&dev_base_lock);
	if (dev_isalive(ndev))
		ret = (*format)(ndev, buf);
	read_unlock(&dev_base_lock);

	return ret;
}

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Stephen Hemminger
75
87.21%
2
50.00%
Greg Kroah-Hartman
8
9.30%
1
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Américo Wang
3
3.49%
1
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86
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4
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/* generate a show function for simple field */

#define NETDEVICE_SHOW(field, format_string)				\
static ssize_t format_##field(const struct net_device *dev, char *buf)  \
{                                                                       \
        return sprintf(buf, format_string, dev->field);                 \
}                                                                       \
static ssize_t field##_show(struct device *dev,                         \
                            struct device_attribute *attr, char *buf)   \
{                                                                       \
        return netdev_show(dev, attr, buf, format_##field);             \
}                                                                       \

#define NETDEVICE_SHOW_RO(field, format_string)                         \
NETDEVICE_SHOW(field, format_string);                                   \
static DEVICE_ATTR_RO(field)


#define NETDEVICE_SHOW_RW(field, format_string)				\
NETDEVICE_SHOW(field, format_string);                                   \
static DEVICE_ATTR_RW(field)

/* use same locking and permission rules as SIF* ioctl's */


static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
			    const char *buf, size_t len,
			    int (*set)(struct net_device *, unsigned long))
{
	struct net_device *netdev = to_net_dev(dev);
	struct net *net = dev_net(netdev);
	unsigned long new;
	int ret = -EINVAL;

	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
		return -EPERM;

	ret = kstrtoul(buf, 0, &new);
	if (ret)
		goto err;

	if (!rtnl_trylock())
		return restart_syscall();

	if (dev_isalive(netdev)) {
		if ((ret = (*set)(netdev, new)) == 0)
			ret = len;
	}
	rtnl_unlock();
 err:
	return ret;
}

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Stephen Hemminger
120
78.95%
4
50.00%
Eric W. Biedermann
20
13.16%
2
25.00%
Shuah Khan
6
3.95%
1
12.50%
Greg Kroah-Hartman
6
3.95%
1
12.50%
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152
100.00%
8
100.00%

NETDEVICE_SHOW_RO(dev_id, fmt_hex);
NETDEVICE_SHOW_RO(dev_port, fmt_dec);
NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec);
NETDEVICE_SHOW_RO(addr_len, fmt_dec);
NETDEVICE_SHOW_RO(ifindex, fmt_dec);
NETDEVICE_SHOW_RO(type, fmt_dec);
NETDEVICE_SHOW_RO(link_mode, fmt_dec);



static ssize_t iflink_show(struct device *dev, struct device_attribute *attr,
			   char *buf)
{
	struct net_device *ndev = to_net_dev(dev);

	return sprintf(buf, fmt_dec, dev_get_iflink(ndev));
}
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Nicolas Dichtel
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Stefan Rompf
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static DEVICE_ATTR_RO(iflink);



static ssize_t format_name_assign_type(const struct net_device *dev, char *buf)
{
	return sprintf(buf, fmt_dec, dev->name_assign_type);
}

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Tom Gundersen
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Américo Wang
2
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static ssize_t name_assign_type_show(struct device *dev,
				     struct device_attribute *attr,
				     char *buf)
{
	struct net_device *ndev = to_net_dev(dev);
	ssize_t ret = -EINVAL;

	if (ndev->name_assign_type != NET_NAME_UNKNOWN)
		ret = netdev_show(dev, attr, buf, format_name_assign_type);

	return ret;
}
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Tom Gundersen
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Américo Wang
2
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60
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static DEVICE_ATTR_RO(name_assign_type);

/* use same locking rules as GIFHWADDR ioctl's */


static ssize_t address_show(struct device *dev, struct device_attribute *attr,
			    char *buf)
{
	struct net_device *ndev = to_net_dev(dev);
	ssize_t ret = -EINVAL;

	read_lock(&dev_base_lock);
	if (dev_isalive(ndev))
		ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len);
	read_unlock(&dev_base_lock);
	return ret;
}
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Stephen Hemminger
61
83.56%
4
50.00%
Greg Kroah-Hartman
7
9.59%
2
25.00%
Américo Wang
4
5.48%
1
12.50%
Michael Chan
1
1.37%
1
12.50%
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73
100.00%
8
100.00%

static DEVICE_ATTR_RO(address);



static ssize_t broadcast_show(struct device *dev,
			      struct device_attribute *attr, char *buf)
{
	struct net_device *ndev = to_net_dev(dev);
	if (dev_isalive(ndev))
		return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len);
	return -EINVAL;
}
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Stephen Hemminger
43
78.18%
3
42.86%
Greg Kroah-Hartman
7
12.73%
2
28.57%
Américo Wang
4
7.27%
1
14.29%
Michael Chan
1
1.82%
1
14.29%
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55
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7
100.00%

static DEVICE_ATTR_RO(broadcast);



static int change_carrier(struct net_device *dev, unsigned long new_carrier)
{
	if (!netif_running(dev))
		return -EINVAL;
	return dev_change_carrier(dev, (bool) new_carrier);
}

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Jiri Pirko
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Américo Wang
3
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38
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static ssize_t carrier_store(struct device *dev, struct device_attribute *attr,
			     const char *buf, size_t len)
{
	return netdev_store(dev, attr, buf, len, change_carrier);
}

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Jiri Pirko
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Greg Kroah-Hartman
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static ssize_t carrier_show(struct device *dev,
			    struct device_attribute *attr, char *buf)
{
	struct net_device *netdev = to_net_dev(dev);
	if (netif_running(netdev)) {
		return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
	}
	return -EINVAL;
}
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Andrew Morton
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Greg Kroah-Hartman
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static DEVICE_ATTR_RW(carrier);



static ssize_t speed_show(struct device *dev,
			  struct device_attribute *attr, char *buf)
{
	struct net_device *netdev = to_net_dev(dev);
	int ret = -EINVAL;

	if (!rtnl_trylock())
		return restart_syscall();

	if (netif_running(netdev)) {
		struct ethtool_link_ksettings cmd;

		if (!__ethtool_get_link_ksettings(netdev, &cmd))
			ret = sprintf(buf, fmt_dec, cmd.base.speed);
	}
	rtnl_unlock();
	return ret;
}
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Andy Gospodarek
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David Decotigny
6
6.59%
1
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Alexander Stein
1
1.10%
1
25.00%
Greg Kroah-Hartman
1
1.10%
1
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91
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static DEVICE_ATTR_RO(speed);



static ssize_t duplex_show(struct device *dev,
			   struct device_attribute *attr, char *buf)
{
	struct net_device *netdev = to_net_dev(dev);
	int ret = -EINVAL;

	if (!rtnl_trylock())
		return restart_syscall();

	if (netif_running(netdev)) {
		struct ethtool_link_ksettings cmd;

		if (!__ethtool_get_link_ksettings(netdev, &cmd)) {
			const char *duplex;

			switch (cmd.base.duplex) {
			case DUPLEX_HALF:
				duplex = "half";
				break;
			case DUPLEX_FULL:
				duplex = "full";
				break;
			default:
				duplex = "unknown";
				break;
			}
			ret = sprintf(buf, "%s\n", duplex);
		}
	}
	rtnl_unlock();
	return ret;
}
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Andy Gospodarek
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66.67%
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Nikolay Aleksandrov
37
29.37%
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David Decotigny
4
3.17%
1
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Greg Kroah-Hartman
1
0.79%
1
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126
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static DEVICE_ATTR_RO(duplex);



static ssize_t dormant_show(struct device *dev,
			    struct device_attribute *attr, char *buf)
{
	struct net_device *netdev = to_net_dev(dev);

	if (netif_running(netdev))
		return sprintf(buf, fmt_dec, !!netif_dormant(netdev));

	return -EINVAL;
}
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Stefan Rompf
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Greg Kroah-Hartman
7
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56
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static DEVICE_ATTR_RO(dormant);


static const char *const operstates[] = {
	"unknown",
	"notpresent", /* currently unused */
	"down",
	"lowerlayerdown",
	"testing", /* currently unused */
	"dormant",
	"up"
};



static ssize_t operstate_show(struct device *dev,
			      struct device_attribute *attr, char *buf)
{
	const struct net_device *netdev = to_net_dev(dev);
	unsigned char operstate;

	read_lock(&dev_base_lock);
	operstate = netdev->operstate;
	if (!netif_running(netdev))
		operstate = IF_OPER_DOWN;
	read_unlock(&dev_base_lock);

	if (operstate >= ARRAY_SIZE(operstates))
		return -EINVAL; /* should not happen */

	return sprintf(buf, "%s\n", operstates[operstate]);
}
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Stefan Rompf
84
91.30%
1
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Greg Kroah-Hartman
7
7.61%
2
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Adrian Bunk
1
1.09%
1
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static DEVICE_ATTR_RO(operstate);



static ssize_t carrier_changes_show(struct device *dev,
				    struct device_attribute *attr,
				    char *buf)
{
	struct net_device *netdev = to_net_dev(dev);
	return sprintf(buf, fmt_dec,
		       atomic_read(&netdev->carrier_changes));
}
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David Decotigny
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static DEVICE_ATTR_RO(carrier_changes);

/* read-write attributes */



static int change_mtu(struct net_device *dev, unsigned long new_mtu)
{
	return dev_set_mtu(dev, (int) new_mtu);
}

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Stephen Hemminger
24
92.31%
1
50.00%
Américo Wang
2
7.69%
1
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26
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2
100.00%



static ssize_t mtu_store(struct device *dev, struct device_attribute *attr,
			 const char *buf, size_t len)
{
	return netdev_store(dev, attr, buf, len, change_mtu);
}
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Stephen Hemminger
29
76.32%
2
50.00%
Greg Kroah-Hartman
9
23.68%
2
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38
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4
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NETDEVICE_SHOW_RW(mtu, fmt_dec);



static int change_flags(struct net_device *dev, unsigned long new_flags)
{
	return dev_change_flags(dev, (unsigned int) new_flags);
}

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Stephen Hemminger
24
88.89%
1
33.33%
Américo Wang
2
7.41%
1
33.33%
Eric Dumazet
1
3.70%
1
33.33%
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27
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3
100.00%



static ssize_t flags_store(struct device *dev, struct device_attribute *attr,
			   const char *buf, size_t len)
{
	return netdev_store(dev, attr, buf, len, change_flags);
}
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Stephen Hemminger
29
76.32%
2
50.00%
Greg Kroah-Hartman
9
23.68%
2
50.00%
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38
100.00%
4
100.00%

NETDEVICE_SHOW_RW(flags, fmt_hex);



static int change_tx_queue_len(struct net_device *dev, unsigned long new_len)
{
	int res, orig_len = dev->tx_queue_len;

	if (new_len != orig_len) {
		dev->tx_queue_len = new_len;
		res = call_netdevice_notifiers(NETDEV_CHANGE_TX_QUEUE_LEN, dev);
		res = notifier_to_errno(res);
		if (res) {
			netdev_err(dev,
				   "refused to change device tx_queue_len\n");
			dev->tx_queue_len = orig_len;
			return -EFAULT;
		}
	}

	return 0;
}

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Jason (Hui) Wang
56
70.00%
1
25.00%
Stephen Hemminger
22
27.50%
2
50.00%
Américo Wang
2
2.50%
1
25.00%
Total
80
100.00%
4
100.00%



static ssize_t tx_queue_len_store(struct device *dev,
				  struct device_attribute *attr,
				  const char *buf, size_t len)
{
	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	return netdev_store(dev, attr, buf, len, change_tx_queue_len);
}
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Stephen Hemminger
29
58.00%
1
25.00%
Eric W. Biedermann
12
24.00%
1
25.00%
Greg Kroah-Hartman
9
18.00%
2
50.00%
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50
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4
100.00%

NETDEVICE_SHOW_RW(tx_queue_len, fmt_ulong);



static int change_gro_flush_timeout(struct net_device *dev, unsigned long val)
{
	dev->gro_flush_timeout = val;
	return 0;
}

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Eric Dumazet
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24
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static ssize_t gro_flush_timeout_store(struct device *dev,
				  struct device_attribute *attr,
				  const char *buf, size_t len)
{
	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	return netdev_store(dev, attr, buf, len, change_gro_flush_timeout);
}
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Eric Dumazet
50
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50
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NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong);



static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr,
			     const char *buf, size_t len)
{
	struct net_device *netdev = to_net_dev(dev);
	struct net *net = dev_net(netdev);
	size_t count = len;
	ssize_t ret;

	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
		return -EPERM;

	/* ignore trailing newline */
	if (len >  0 && buf[len - 1] == '\n')
		--count;

	if (!rtnl_trylock())
		return restart_syscall();
	ret = dev_set_alias(netdev, buf, count);
	rtnl_unlock();

	return ret < 0 ? ret : len;
}

Contributors
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CommitProp
Stephen Hemminger
95
79.17%
1
25.00%
Eric W. Biedermann
24
20.00%
2
50.00%
Greg Kroah-Hartman
1
0.83%
1
25.00%
Total
120
100.00%
4
100.00%



static ssize_t ifalias_show(struct device *dev,
			    struct device_attribute *attr, char *buf)
{
	const struct net_device *netdev = to_net_dev(dev);
	ssize_t ret = 0;

	if (!rtnl_trylock())
		return restart_syscall();
	if (netdev->ifalias)
		ret = sprintf(buf, "%s\n", netdev->ifalias);
	rtnl_unlock();
	return ret;
}
Contributors
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CommitProp
Stephen Hemminger
61
85.92%
1
33.33%
Eric W. Biedermann
9
12.68%
1
33.33%
Greg Kroah-Hartman
1
1.41%
1
33.33%
Total
71
100.00%
3
100.00%

static DEVICE_ATTR_RW(ifalias);



static int change_group(struct net_device *dev, unsigned long new_group)
{
	dev_set_group(dev, (int) new_group);
	return 0;
}

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Vlad Dogaru
26
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Américo Wang
2
7.14%
1
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28
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100.00%



static ssize_t group_store(struct device *dev, struct device_attribute *attr,
			   const char *buf, size_t len)
{
	return netdev_store(dev, attr, buf, len, change_group);
}
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Vlad Dogaru
37
97.37%
1
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Greg Kroah-Hartman
1
2.63%
1
50.00%
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38
100.00%
2
100.00%

NETDEVICE_SHOW(group, fmt_dec);
static DEVICE_ATTR(netdev_group, S_IRUGO | S_IWUSR, group_show, group_store);



static int change_proto_down(struct net_device *dev, unsigned long proto_down)
{
	return dev_change_proto_down(dev, (bool) proto_down);
}

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Anuradha Karuppiah
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static ssize_t proto_down_store(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t len)
{
	return netdev_store(dev, attr, buf, len, change_proto_down);
}
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Anuradha Karuppiah
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38
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NETDEVICE_SHOW_RW(proto_down, fmt_dec);



static ssize_t phys_port_id_show(struct device *dev,
				 struct device_attribute *attr, char *buf)
{
	struct net_device *netdev = to_net_dev(dev);
	ssize_t ret = -EINVAL;

	if (!rtnl_trylock())
		return restart_syscall();

	if (dev_isalive(netdev)) {
		struct netdev_phys_item_id ppid;

		ret = dev_get_phys_port_id(netdev, &ppid);
		if (!ret)
			ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id);
	}
	rtnl_unlock();

	return ret;
}
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Jiri Pirko
96
98.97%
2
66.67%
Linus Torvalds
1
1.03%
1
33.33%
Total
97
100.00%
3
100.00%

static DEVICE_ATTR_RO(phys_port_id);



static ssize_t phys_port_name_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	struct net_device *netdev = to_net_dev(dev);
	ssize_t ret = -EINVAL;

	if (!rtnl_trylock())
		return restart_syscall();

	if (dev_isalive(netdev)) {
		char name[IFNAMSIZ];

		ret = dev_get_phys_port_name(netdev, name, sizeof(name));
		if (!ret)
			ret = sprintf(buf, "%s\n", name);
	}
	rtnl_unlock();

	return ret;
}
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David Ahern
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100.00%

static DEVICE_ATTR_RO(phys_port_name);



static ssize_t phys_switch_id_show(struct device *dev,
				   struct device_attribute *attr, char *buf)
{
	struct net_device *netdev = to_net_dev(dev);
	ssize_t ret = -EINVAL;

	if (!rtnl_trylock())
		return restart_syscall();

	if (dev_isalive(netdev)) {
		struct switchdev_attr attr = {
			.orig_dev = netdev,
			.id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
			.flags = SWITCHDEV_F_NO_RECURSE,
                };

		ret = switchdev_port_attr_get(netdev, &attr);
		if (!ret)
			ret = sprintf(buf, "%*phN\n", attr.u.ppid.id_len,
				      attr.u.ppid.id);
	}
	rtnl_unlock();

	return ret;
}
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Jiri Pirko
94
77.05%
2
40.00%
Scott Feldman
23
18.85%
2
40.00%
Ido Schimmel
5
4.10%
1
20.00%
Total
122
100.00%
5
100.00%

static DEVICE_ATTR_RO(phys_switch_id);


static struct attribute *net_class_attrs[] = {
	&dev_attr_netdev_group.attr,
	&dev_attr_type.attr,
	&dev_attr_dev_id.attr,
	&dev_attr_dev_port.attr,
	&dev_attr_iflink.attr,
	&dev_attr_ifindex.attr,
	&dev_attr_name_assign_type.attr,
	&dev_attr_addr_assign_type.attr,
	&dev_attr_addr_len.attr,
	&dev_attr_link_mode.attr,
	&dev_attr_address.attr,
	&dev_attr_broadcast.attr,
	&dev_attr_speed.attr,
	&dev_attr_duplex.attr,
	&dev_attr_dormant.attr,
	&dev_attr_operstate.attr,
	&dev_attr_carrier_changes.attr,
	&dev_attr_ifalias.attr,
	&dev_attr_carrier.attr,
	&dev_attr_mtu.attr,
	&dev_attr_flags.attr,
	&dev_attr_tx_queue_len.attr,
	&dev_attr_gro_flush_timeout.attr,
	&dev_attr_phys_port_id.attr,
	&dev_attr_phys_port_name.attr,
	&dev_attr_phys_switch_id.attr,
	&dev_attr_proto_down.attr,
	NULL,
};

ATTRIBUTE_GROUPS(net_class);

/* Show a given an attribute in the statistics group */


static ssize_t netstat_show(const struct device *d,
			    struct device_attribute *attr, char *buf,
			    unsigned long offset)
{
	struct net_device *dev = to_net_dev(d);
	ssize_t ret = -EINVAL;

	WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||
			offset % sizeof(u64) != 0);

	read_lock(&dev_base_lock);
	if (dev_isalive(dev)) {
		struct rtnl_link_stats64 temp;
		const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);

		ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset));
	}
	read_unlock(&dev_base_lock);
	return ret;
}

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Stephen Hemminger
101
78.29%
3
37.50%
Ben Hutchings
8
6.20%
1
12.50%
Greg Kroah-Hartman
8
6.20%
1
12.50%
Eric Dumazet
7
5.43%
1
12.50%
Pavel Emelyanov
5
3.88%
2
25.00%
Total
129
100.00%
8
100.00%

/* generate a read-only statistics attribute */

#define NETSTAT_ENTRY(name)						\
static ssize_t name##_show(struct device *d,                            \
                           struct device_attribute *attr, char *buf)    \
{                                                                       \
        return netstat_show(d, attr, buf,                               \
                            offsetof(struct rtnl_link_stats64, name));  \
}                                                                       \
static DEVICE_ATTR_RO(name)


NETSTAT_ENTRY(rx_packets);

NETSTAT_ENTRY(tx_packets);

NETSTAT_ENTRY(rx_bytes);

NETSTAT_ENTRY(tx_bytes);

NETSTAT_ENTRY(rx_errors);

NETSTAT_ENTRY(tx_errors);

NETSTAT_ENTRY(rx_dropped);

NETSTAT_ENTRY(tx_dropped);

NETSTAT_ENTRY(multicast);

NETSTAT_ENTRY(collisions);

NETSTAT_ENTRY(rx_length_errors);

NETSTAT_ENTRY(rx_over_errors);

NETSTAT_ENTRY(rx_crc_errors);

NETSTAT_ENTRY(rx_frame_errors);

NETSTAT_ENTRY(rx_fifo_errors);

NETSTAT_ENTRY(rx_missed_errors);

NETSTAT_ENTRY(tx_aborted_errors);

NETSTAT_ENTRY(tx_carrier_errors);

NETSTAT_ENTRY(tx_fifo_errors);

NETSTAT_ENTRY(tx_heartbeat_errors);

NETSTAT_ENTRY(tx_window_errors);

NETSTAT_ENTRY(rx_compressed);

NETSTAT_ENTRY(tx_compressed);

NETSTAT_ENTRY(rx_nohandler);


static struct attribute *netstat_attrs[] = {
	&dev_attr_rx_packets.attr,
	&dev_attr_tx_packets.attr,
	&dev_attr_rx_bytes.attr,
	&dev_attr_tx_bytes.attr,
	&dev_attr_rx_errors.attr,
	&dev_attr_tx_errors.attr,
	&dev_attr_rx_dropped.attr,
	&dev_attr_tx_dropped.attr,
	&dev_attr_multicast.attr,
	&dev_attr_collisions.attr,
	&dev_attr_rx_length_errors.attr,
	&dev_attr_rx_over_errors.attr,
	&dev_attr_rx_crc_errors.attr,
	&dev_attr_rx_frame_errors.attr,
	&dev_attr_rx_fifo_errors.attr,
	&dev_attr_rx_missed_errors.attr,
	&dev_attr_tx_aborted_errors.attr,
	&dev_attr_tx_carrier_errors.attr,
	&dev_attr_tx_fifo_errors.attr,
	&dev_attr_tx_heartbeat_errors.attr,
	&dev_attr_tx_window_errors.attr,
	&dev_attr_rx_compressed.attr,
	&dev_attr_tx_compressed.attr,
	&dev_attr_rx_nohandler.attr,
	NULL
};



static struct attribute_group netstat_group = {
	.name  = "statistics",
	.attrs  = netstat_attrs,
};

#if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211)

static struct attribute *wireless_attrs[] = {
	NULL
};


static struct attribute_group wireless_group = {
	.name = "wireless",
	.attrs = wireless_attrs,
};
#endif

#else /* CONFIG_SYSFS */

#define net_class_groups	NULL
#endif /* CONFIG_SYSFS */

#ifdef CONFIG_SYSFS

#define to_rx_queue_attr(_attr) container_of(_attr,             \
    struct rx_queue_attribute, attr)


#define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj)



static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr,
				  char *buf)
{
	struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
	struct netdev_rx_queue *queue = to_rx_queue(kobj);

	if (!attribute->show)
		return -EIO;

	return attribute->show(queue, attribute, buf);
}

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63
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63
100.00%
1
100.00%



static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr,
				   const char *buf, size_t count)
{
	struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
	struct netdev_rx_queue *queue = to_rx_queue(kobj);

	if (!attribute->store)
		return -EIO;

	return attribute->store(queue, attribute, buf, count);
}

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Tom Herbert
69
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100.00%
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69
100.00%
1
100.00%


static const struct sysfs_ops rx_queue_sysfs_ops = {
	.show = rx_queue_attr_show,
	.store = rx_queue_attr_store,
};

#ifdef CONFIG_RPS


static ssize_t show_rps_map(struct netdev_rx_queue *queue,
			    struct rx_queue_attribute *attribute, char *buf)
{
	struct rps_map *map;
	cpumask_var_t mask;
	int i, len;

	if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
		return -ENOMEM;

	rcu_read_lock();
	map = rcu_dereference(queue->rps_map);
	if (map)
		for (i = 0; i < map->len; i++)
			cpumask_set_cpu(map->cpus[i], mask);

	len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask));
	rcu_read_unlock();
	free_cpumask_var(mask);

	return len < PAGE_SIZE ? len : -EINVAL;
}

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Tom Herbert
110
88.00%
1
50.00%
Tejun Heo
15
12.00%
1
50.00%
Total
125
100.00%
2
100.00%



static ssize_t store_rps_map(struct netdev_rx_queue *queue,
		      struct rx_queue_attribute *attribute,
		      const char *buf, size_t len)
{
	struct rps_map *old_map, *map;
	cpumask_var_t mask;
	int err, cpu, i;
	static DEFINE_MUTEX(rps_map_mutex);

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	if (!alloc_cpumask_var(&mask, GFP_KERNEL))
		return -ENOMEM;

	err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
	if (err) {
		free_cpumask_var(mask);
		return err;
	}

	map = kzalloc(max_t(unsigned int,
	    RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
	    GFP_KERNEL);
	if (!map) {
		free_cpumask_var(mask);
		return -ENOMEM;
	}

	i = 0;
	for_each_cpu_and(cpu, mask, cpu_online_mask)
		map->cpus[i++] = cpu;

	if (i)
		map->len = i;
	else {
		kfree(map);
		map = NULL;
	}

	mutex_lock(&rps_map_mutex);
	old_map = rcu_dereference_protected(queue->rps_map,
					    mutex_is_locked(&rps_map_mutex));
	rcu_assign_pointer(queue->rps_map, map);

	if (map)
		static_key_slow_inc(&rps_needed);
	if (old_map)
		static_key_slow_dec(&rps_needed);

	mutex_unlock(&rps_map_mutex);

	if (old_map)
		kfree_rcu(old_map, rcu);

	free_cpumask_var(mask);
	return len;
}

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Tom Herbert
227
88.67%
2
25.00%
Eric Dumazet
19
7.42%
4
50.00%
Sasha Levin
8
3.12%
1
12.50%
Lai Jiangshan
2
0.78%
1
12.50%
Total
256
100.00%
8
100.00%



static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
					   struct rx_queue_attribute *attr,
					   char *buf)
{
	struct rps_dev_flow_table *flow_table;
	unsigned long val = 0;

	rcu_read_lock();
	flow_table = rcu_dereference(queue->rps_flow_table);
	if (flow_table)
		val = (unsigned long)flow_table->mask + 1;
	rcu_read_unlock();

	return sprintf(buf, "%lu\n", val);
}

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Tom Herbert
66
91.67%
1
50.00%
Eric Dumazet
6
8.33%
1
50.00%
Total
72
100.00%
2
100.00%



static void rps_dev_flow_table_release(struct rcu_head *rcu)
{
	struct rps_dev_flow_table *table = container_of(rcu,
	    struct rps_dev_flow_table, rcu);
	vfree(table);
}

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Tom Herbert
30
96.77%
1
50.00%
Al Viro
1
3.23%
1
50.00%
Total
31
100.00%
2
100.00%



static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
				     struct rx_queue_attribute *attr,
				     const char *buf, size_t len)
{
	unsigned long mask, count;
	struct rps_dev_flow_table *table, *old_table;
	static DEFINE_SPINLOCK(rps_dev_flow_lock);
	int rc;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	rc = kstrtoul(buf, 0, &count);
	if (rc < 0)
		return rc;

	if (count) {
		mask = count - 1;
		/* mask = roundup_pow_of_two(count) - 1;
                 * without overflows...
                 */
		while ((mask | (mask >> 1)) != mask)
			mask |= (mask >> 1);
		/* On 64 bit arches, must check mask fits in table->mask (u32),
                 * and on 32bit arches, must check
                 * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow.
                 */
#if BITS_PER_LONG > 32
		if (mask > (unsigned long)(u32)mask)
			return -EINVAL;
#else
		if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1))
				/ sizeof(struct rps_dev_flow)) {
			/* Enforce a limit to prevent overflow */
			return -EINVAL;
		}
#endif
		table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1));
		if (!table)
			return -ENOMEM;

		table->mask = mask;
		for (count = 0; count <= mask; count++)
			table->flows[count].cpu = RPS_NO_CPU;
	} else
		table = NULL;

	spin_lock(&rps_dev_flow_lock);
	old_table = rcu_dereference_protected(queue->rps_flow_table,
					      lockdep_is_held(&rps_dev_flow_lock));
	rcu_assign_pointer(queue->rps_flow_table, table);
	spin_unlock(&rps_dev_flow_lock);

	if (old_table)
		call_rcu(&old_table->rcu, rps_dev_flow_table_release);

	return len;
}

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Tom Herbert
169
61.01%
1
16.67%
Eric Dumazet
84
30.32%
3
50.00%
Xi Wang
23
8.30%
1
16.67%
Stephen Hemminger
1
0.36%
1
16.67%
Total
277
100.00%
6
100.00%


static struct rx_queue_attribute rps_cpus_attribute =
	__ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map);



static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute =
	__ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR,
	    show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt);
#endif /* CONFIG_RPS */


static struct attribute *rx_queue_default_attrs[] = {
#ifdef CONFIG_RPS
	&rps_cpus_attribute.attr,
	&rps_dev_flow_table_cnt_attribute.attr,
#endif
	NULL
};



static void rx_queue_release(struct kobject *kobj)
{
	struct netdev_rx_queue *queue = to_rx_queue(kobj);
#ifdef CONFIG_RPS
	struct rps_map *map;
	struct rps_dev_flow_table *flow_table;


	map = rcu_dereference_protected(queue->rps_map, 1);
	if (map) {
		RCU_INIT_POINTER(queue->rps_map, NULL);
		kfree_rcu(map, rcu);
	}

	flow_table = rcu_dereference_protected(queue->rps_flow_table, 1);
	if (flow_table) {
		RCU_INIT_POINTER(queue->rps_flow_table, NULL);
		call_rcu(&flow_table->rcu, rps_dev_flow_table_release);
	}
#endif

	memset(kobj, 0, sizeof(*kobj));
	dev_put(queue->dev);
}

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Tom Herbert
50
40.00%
3
37.50%
John Fastabend
35
28.00%
1
12.50%
Eric Dumazet
33
26.40%
2
25.00%
Michael Dalton
5
4.00%
1
12.50%
Lai Jiangshan
2
1.60%
1
12.50%
Total
125
100.00%
8
100.00%



static const void *rx_queue_namespace(struct kobject *kobj)
{
	struct netdev_rx_queue *queue = to_rx_queue(kobj);
	struct device *dev = &queue->dev->dev;
	const void *ns = NULL;

	if (dev->class && dev->class->ns_type)
		ns = dev->class->namespace(dev);

	return ns;
}

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Weilong Chen
68
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1
100.00%
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68
100.00%
1
100.00%


static struct kobj_type rx_queue_ktype = {
	.sysfs_ops = &rx_queue_sysfs_ops,
	.release = rx_queue_release,
	.default_attrs = rx_queue_default_attrs,
	.namespace = rx_queue_namespace
};



static int rx_queue_add_kobject(struct net_device *dev, int index)
{
	struct netdev_rx_queue *queue = dev->_rx + index;
	struct kobject *kobj = &queue->kobj;
	int error = 0;

	kobj->kset = dev->queues_kset;
	error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
	    "rx-%u", index);
	if (error)
		goto exit;

	if (dev->sysfs_rx_queue_group) {
		error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group);
		if (error)
			goto exit;
	}

	kobject_uevent(kobj, KOBJ_ADD);
	dev_hold(queue->dev);

	return error;
exit:
	kobject_put(kobj);
	return error;
}
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Tom Herbert
89
71.77%
3
60.00%
Michael Dalton
30
24.19%
1
20.00%
Américo Wang
5
4.03%
1
20.00%
Total
124
100.00%
5
100.00%

#endif /* CONFIG_SYSFS */


int

net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
{
#ifdef CONFIG_SYSFS
	int i;
	int error = 0;

#ifndef CONFIG_RPS
	if (!dev->sysfs_rx_queue_group)
		return 0;
#endif
	for (i = old_num; i < new_num; i++) {
		error = rx_queue_add_kobject(dev, i);
		if (error) {
			new_num = old_num;
			break;
		}
	}

	while (--i >= new_num) {
		struct kobject *kobj = &dev->_rx[i].kobj;

		if (!atomic_read(&dev_net(dev)->count))
			kobj->uevent_suppress = 1;
		if (dev->sysfs_rx_queue_group)
			sysfs_remove_group(kobj, dev->sysfs_rx_queue_group);
		kobject_put(kobj);
	}

	return error;
#else
	return 0;
#endif
}

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65
43.05%
2
28.57%
Andrey Vagin
35
23.18%
2
28.57%
Michael Dalton
30
19.87%
1
14.29%
Ben Hutchings
16
10.60%
1
14.29%
Américo Wang
5
3.31%
1
14.29%
Total
151
100.00%
7
100.00%

#ifdef CONFIG_SYSFS
/*
 * netdev_queue sysfs structures and functions.
 */

struct netdev_queue_attribute {
	
struct attribute attr;
	
ssize_t (*show)(struct netdev_queue *queue,
	    struct netdev_queue_attribute *attr, char *buf);
	
ssize_t (*store)(struct netdev_queue *queue,
	    struct netdev_queue_attribute *attr, const char *buf, size_t len);
};

#define to_netdev_queue_attr(_attr) container_of(_attr,             \
    struct netdev_queue_attribute, attr)


#define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj)



static ssize_t netdev_queue_attr_show(struct kobject *kobj,
				      struct attribute *attr, char *buf)
{
	struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
	struct netdev_queue *queue = to_netdev_queue(kobj);

	if (!attribute->show)
		return -EIO;

	return attribute->show(queue, attribute, buf);
}

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63
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1
100.00%



static ssize_t netdev_queue_attr_store(struct kobject *kobj,
				       struct attribute *attr,
				       const char *buf, size_t count)
{
	struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
	struct netdev_queue *queue = to_netdev_queue(kobj);

	if (!attribute->store)
		return -EIO;

	return attribute->store(queue, attribute, buf, count);
}

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69
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1
100.00%


static const struct sysfs_ops netdev_queue_sysfs_ops = {
	.show = netdev_queue_attr_show,
	.store = netdev_queue_attr_store,
};



static ssize_t show_trans_timeout(struct netdev_queue *queue,
				  struct netdev_queue_attribute *attribute,
				  char *buf)
{
	unsigned long trans_timeout;

	spin_lock_irq(&queue->_xmit_lock);
	trans_timeout = queue->trans_timeout;
	spin_unlock_irq(&queue->_xmit_lock);

	return sprintf(buf, "%lu", trans_timeout);
}

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David Decotigny
56
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1
100.00%
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56
100.00%
1
100.00%



static unsigned int get_netdev_queue_index(struct netdev_queue *queue)
{
	struct net_device *dev = queue->dev;
	unsigned int i;

	i = queue - dev->_tx;
	BUG_ON(i >= dev->num_tx_queues);

	return i;
}

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John Fastabend
42
93.33%
1
50.00%
Thadeu Lima de Souza Cascardo
3
6.67%
1
50.00%
Total
45
100.00%
2
100.00%



static ssize_t show_traffic_class(struct netdev_queue *queue,
				  struct netdev_queue_attribute *attribute,
				  char *buf)
{
	struct net_device *dev = queue->dev;
	int index = get_netdev_queue_index(queue);
	int tc = netdev_txq_to_tc(dev, index);

	if (tc < 0)
		return -EINVAL;

	return sprintf(buf, "%u\n", tc);
}

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Alexander Duyck
67
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1
100.00%
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67
100.00%
1
100.00%

#ifdef CONFIG_XPS


static ssize_t show_tx_maxrate(struct netdev_queue *queue,
			       struct netdev_queue_attribute *attribute,
			       char *buf)
{
	return sprintf(buf, "%lu\n", queue->tx_maxrate);
}

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100.00%
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32
100.00%
1
100.00%



static ssize_t set_tx_maxrate(struct netdev_queue *queue,
			      struct netdev_queue_attribute *attribute,
			      const char *buf, size_t len)
{
	struct net_device *dev = queue->dev;
	int err, index = get_netdev_queue_index(queue);
	u32 rate = 0;

	err = kstrtou32(buf, 10, &rate);
	if (err < 0)
		return err;

	if (!rtnl_trylock())
		return restart_syscall();

	err = -EOPNOTSUPP;
	if (dev->netdev_ops->ndo_set_tx_maxrate)
		err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate);

	rtnl_unlock();
	if (!err) {
		queue->tx_maxrate = rate;
		return len;
	}
	return err;
}

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John Fastabend
129
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1
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129
100.00%
1
100.00%


static struct netdev_queue_attribute queue_tx_maxrate =
	__ATTR(tx_maxrate, S_IRUGO | S_IWUSR,
	       show_tx_maxrate, set_tx_maxrate);
#endif


static struct netdev_queue_attribute queue_trans_timeout =
	__ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL);


static struct netdev_queue_attribute queue_traffic_class =
	__ATTR(traffic_class, S_IRUGO, show_traffic_class, NULL);

#ifdef CONFIG_BQL
/*
 * Byte queue limits sysfs structures and functions.
 */


static ssize_t bql_show(char *buf, unsigned int value)
{
	return sprintf(buf, "%u\n", value);
}

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Tom Herbert
24
100.00%
1
100.00%
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24
100.00%
1
100.00%



static ssize_t bql_set(const char *buf, const size_t count,
		       unsigned int *pvalue)
{
	unsigned int value;
	int err;

	if (!strcmp(buf, "max") || !strcmp(buf, "max\n"))
		value = DQL_MAX_LIMIT;
	else {
		err = kstrtouint(buf, 10, &value);
		if (err < 0)
			return err;
		if (value > DQL_MAX_LIMIT)
			return -EINVAL;
	}

	*pvalue = value;

	return count;
}

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Tom Herbert
91
100.00%
1
100.00%
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91
100.00%
1
100.00%



static ssize_t bql_show_hold_time(struct netdev_queue *queue,
				  struct netdev_queue_attribute *attr,
				  char *buf)
{
	struct dql *dql = &queue->dql;

	return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time));
}

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Tom Herbert
45
100.00%
1
100.00%
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45
100.00%
1
100.00%



static ssize_t bql_set_hold_time(struct netdev_queue *queue,
				 struct netdev_queue_attribute *attribute,
				 const char *buf, size_t len)
{
	struct dql *dql = &queue->dql;
	unsigned int value;
	int err;

	err = kstrtouint(buf, 10, &value);
	if (err < 0)
		return err;

	dql->slack_hold_time = msecs_to_jiffies(value);

	return len;
}

Contributors
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Tom Herbert
73
98.65%
1
50.00%
Eric Dumazet
1
1.35%
1
50.00%
Total
74
100.00%
2
100.00%


static struct netdev_queue_attribute bql_hold_time_attribute =
	__ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time,
	    bql_set_hold_time);



static ssize_t bql_show_inflight(struct netdev_queue *queue,
				 struct netdev_queue_attribute *attr,
				 char *buf)
{
	struct dql *dql = &queue->dql;

	return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed);
}

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Tom Herbert
46
100.00%
1
100.00%
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46
100.00%
1
100.00%


static struct netdev_queue_attribute bql_inflight_attribute =
	__ATTR(inflight, S_IRUGO, bql_show_inflight, NULL);


#define BQL_ATTR(NAME, FIELD)						\
static ssize_t bql_show_ ## NAME(struct netdev_queue *queue,            \
                                 struct netdev_queue_attribute *attr,   \
                                 char *buf)                             \
{                                                                       \
        return bql_show(buf, queue->dql.FIELD);                         \
}                                                                       \
                                                                        \
static ssize_t bql_set_ ## NAME(struct netdev_queue *queue,             \
                                struct netdev_queue_attribute *attr,    \
                                const char *buf, size_t len)            \
{                                                                       \
        return bql_set(buf, len, &queue->dql.FIELD);                    \
}                                                                       \
                                                                        \
static struct netdev_queue_attribute bql_ ## NAME ## _attribute =       \
        __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME,              \
            bql_set_ ## NAME);

BQL_ATTR(limit, limit)
BQL_ATTR(limit_max, max_limit)
BQL_ATTR(limit_min, min_limit)


static struct attribute *dql_attrs[] = {
	&bql_limit_attribute.attr,
	&bql_limit_max_attribute.attr,
	&bql_limit_min_attribute.attr,
	&bql_hold_time_attribute.attr,
	&bql_inflight_attribute.attr,
	NULL
};


static struct attribute_group dql_group = {
	.name  = "byte_queue_limits",
	.attrs  = dql_attrs,
};
#endif /* CONFIG_BQL */

#ifdef CONFIG_XPS


static ssize_t show_xps_map(struct netdev_queue *queue,
			    struct netdev_queue_attribute *attribute, char *buf)
{
	struct net_device *dev = queue->dev;
	int cpu, len, num_tc = 1, tc = 0;
	struct xps_dev_maps *dev_maps;
	cpumask_var_t mask;
	unsigned long index;

	if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
		return -ENOMEM;

	index = get_netdev_queue_index(queue);

	if (dev->num_tc) {
		num_tc = dev->num_tc;
		tc = netdev_txq_to_tc(dev, index);
		if (tc < 0)
			return -EINVAL;
	}

	rcu_read_lock();
	dev_maps = rcu_dereference(dev->xps_maps);
	if (dev_maps) {
		for_each_possible_cpu(cpu) {
			int i, tci = cpu * num_tc + tc;
			struct xps_map *map;

			map = rcu_dereference(dev_maps->cpu_map[tci]);
			if (!map)
				continue;

			for (i = map->len; i--;) {
				if (map->queues[i] == index) {
					cpumask_set_cpu(cpu, mask);
					break;
				}
			}
		}
	}
	rcu_read_unlock();

	len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask));
	free_cpumask_var(mask);
	return len < PAGE_SIZE ? len : -EINVAL;
}

Contributors
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Tom Herbert
152
64.41%
1
33.33%
Alexander Duyck
71
30.08%
1
33.33%
Tejun Heo
13
5.51%
1
33.33%
Total
236
100.00%
3
100.00%



static ssize_t store_xps_map(struct netdev_queue *queue,
		      struct netdev_queue_attribute *attribute,
		      const char *buf, size_t len)
{
	struct net_device *dev = queue->dev;
	unsigned long index;
	cpumask_var_t mask;
	int err;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	if (!alloc_cpumask_var(&mask, GFP_KERNEL))
		return -ENOMEM;

	index = get_netdev_queue_index(queue);

	err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
	if (err) {
		free_cpumask_var(mask);
		return err;
	}

	err = netif_set_xps_queue(dev, mask, index);

	free_cpumask_var(mask);

	return err ? : len;
}

Contributors
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Tokens
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CommitProp
Tom Herbert
116
89.92%
1
33.33%
Alexander Duyck
9
6.98%
1
33.33%
Eric Dumazet
4
3.10%
1
33.33%
Total
129
100.00%
3
100.00%


static struct netdev_queue_attribute xps_cpus_attribute =
    __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map);
#endif /* CONFIG_XPS */


static struct attribute *netdev_queue_default_attrs[] = {
	&queue_trans_timeout.attr,
	&queue_traffic_class.attr,
#ifdef CONFIG_XPS
	&xps_cpus_attribute.attr,
	&queue_tx_maxrate.attr,
#endif
	NULL
};



static void netdev_queue_release(struct kobject *kobj)
{
	struct netdev_queue *queue = to_netdev_queue(kobj);

	memset(kobj, 0, sizeof(*kobj));
	dev_put(queue->dev);
}

Contributors
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Tom Herbert
41
100.00%
1
100.00%
Total
41
100.00%
1
100.00%



static const void *netdev_queue_namespace(struct kobject *kobj)
{
	struct netdev_queue *queue = to_netdev_queue(kobj);
	struct device *dev = &queue->dev->dev;
	const void *ns = NULL;

	if (dev->class && dev->class->ns_type)
		ns = dev->class->namespace(dev);

	return ns;
}

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Weilong Chen
68
100.00%
1
100.00%
Total
68
100.00%
1
100.00%


static struct kobj_type netdev_queue_ktype = {
	.sysfs_ops = &netdev_queue_sysfs_ops,
	.release = netdev_queue_release,
	.default_attrs = netdev_queue_default_attrs,
	.namespace = netdev_queue_namespace,
};



static int netdev_queue_add_kobject(struct net_device *dev, int index)
{
	struct netdev_queue *queue = dev->_tx + index;
	struct kobject *kobj = &queue->kobj;
	int error = 0;

	kobj->kset = dev->queues_kset;
	error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL,
	    "tx-%u", index);
	if (error)
		goto exit;

#ifdef CONFIG_BQL
	error = sysfs_create_group(kobj, &dql_group);
	if (error)
		goto exit;
#endif

	kobject_uevent(kobj, KOBJ_ADD);
	dev_hold(queue->dev);

	return 0;
exit:
	kobject_put(kobj);
	return error;
}
Contributors
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Tom Herbert
117
97.50%
2
66.67%
Américo Wang
3
2.50%
1
33.33%
Total
120
100.00%
3
100.00%

#endif /* CONFIG_SYSFS */


int

netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
{
#ifdef CONFIG_SYSFS
	int i;
	int error = 0;

	for (i = old_num; i < new_num; i++) {
		error = netdev_queue_add_kobject(dev, i);
		if (error) {
			new_num = old_num;
			break;
		}
	}

	while (--i >= new_num) {
		struct netdev_queue *queue = dev->_tx + i;

		if (!atomic_read(&dev_net(dev)->count))
			queue->kobj.uevent_suppress = 1;
#ifdef CONFIG_BQL
		sysfs_remove_group(&queue->kobj, &dql_group);
#endif
		kobject_put(&queue->kobj);
	}

	return error;
#else
	return 0;
#endif /* CONFIG_SYSFS */
}

Contributors
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Tokens
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CommitProp
Tom Herbert
112
80.58%
3
42.86%
Andrey Vagin
22
15.83%
2
28.57%
Américo Wang
3
2.16%
1
14.29%
David Decotigny
2
1.44%
1
14.29%
Total
139
100.00%
7
100.00%



static int register_queue_kobjects(struct net_device *dev)
{
	int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;

#ifdef CONFIG_SYSFS
	dev->queues_kset = kset_create_and_add("queues",
	    NULL, &dev->dev.kobj);
	if (!dev->queues_kset)
		return -ENOMEM;
	real_rx = dev->real_num_rx_queues;
#endif
	real_tx = dev->real_num_tx_queues;

	error = net_rx_queue_update_kobjects(dev, 0, real_rx);
	if (error)
		goto error;
	rxq = real_rx;

	error = netdev_queue_update_kobjects(dev, 0, real_tx);
	if (error)
		goto error;
	txq = real_tx;

	return 0;

error:
	netdev_queue_update_kobjects(dev, txq, 0);
	net_rx_queue_update_kobjects(dev, rxq, 0);
	return error;
}

Contributors
Person
Tokens
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CommitProp
Tom Herbert
108
72.97%
3
50.00%
Ben Hutchings
27
18.24%
1
16.67%
Américo Wang
10
6.76%
1
16.67%
David Decotigny
3
2.03%
1
16.67%
Total
148
100.00%
6
100.00%



static void remove_queue_kobjects(struct net_device *dev)
{
	int real_rx = 0, real_tx = 0;

#ifdef CONFIG_SYSFS
	real_rx = dev->real_num_rx_queues;
#endif
	real_tx = dev->real_num_tx_queues;

	net_rx_queue_update_kobjects(dev, real_rx, 0);
	netdev_queue_update_kobjects(dev, real_tx, 0);
#ifdef CONFIG_SYSFS
	kset_unregister(dev->queues_kset);
#endif
}

Contributors
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Tokens
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CommitProp
Tom Herbert
40
59.70%
3
37.50%
Ben Hutchings
15
22.39%
1
12.50%
Américo Wang
6
8.96%
1
12.50%
David Decotigny
3
4.48%
1
12.50%
Eric W. Biedermann
2
2.99%
1
12.50%
Michael Dalton
1
1.49%
1
12.50%
Total
67
100.00%
8
100.00%



static bool net_current_may_mount(void)
{
	struct net *net = current->nsproxy->net_ns;

	return ns_capable(net->user_ns, CAP_SYS_ADMIN);
}

Contributors
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Eric W. Biedermann
29
100.00%
1
100.00%
Total
29
100.00%
1
100.00%



static void *net_grab_current_ns(void)
{
	struct net *ns = current->nsproxy->net_ns;
#ifdef CONFIG_NET_NS
	if (ns)
		atomic_inc(&ns->passive);
#endif
	return ns;
}

Contributors
Person
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Al Viro
26
65.00%
1
50.00%
Eric W. Biedermann
14
35.00%
1
50.00%
Total
40
100.00%
2
100.00%



static const void *net_initial_ns(void)
{
	return &init_net;
}

Contributors
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Eric W. Biedermann
14
100.00%
1
100.00%
Total
14
100.00%
1
100.00%



static const void *net_netlink_ns(struct sock *sk)
{
	return sock_net(sk);
}

Contributors
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Eric W. Biedermann
19
100.00%
1
100.00%
Total
19
100.00%
1
100.00%


struct kobj_ns_type_operations net_ns_type_operations = {
	.type = KOBJ_NS_TYPE_NET,
	.current_may_mount = net_current_may_mount,
	.grab_current_ns = net_grab_current_ns,
	.netlink_ns = net_netlink_ns,
	.initial_ns = net_initial_ns,
	.drop_ns = net_drop_ns,
};

EXPORT_SYMBOL_GPL(net_ns_type_operations);



static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
{
	struct net_device *dev = to_net_dev(d);
	int retval;

	/* pass interface to uevent. */
	retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
	if (retval)
		goto exit;

	/* pass ifindex to uevent.
         * ifindex is useful as it won't change (interface name may change)
         * and is what RtNetlink uses natively. */
	retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);

exit:
	return retval;
}

Contributors
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CommitProp
Stephen Hemminger
35
50.72%
1
16.67%
Eric Rannaud
14
20.29%
1
16.67%
Jean Tourrilhes
10
14.49%
1
16.67%
Kay Sievers
7
10.14%
2
33.33%
Greg Kroah-Hartman
3
4.35%
1
16.67%
Total
69
100.00%
6
100.00%

/*
 *      netdev_release -- destroy and free a dead device.
 *      Called when last reference to device kobject is gone.
 */


static void netdev_release(struct device *d)
{
	struct net_device *dev = to_net_dev(d);

	BUG_ON(dev->reg_state != NETREG_RELEASED);

	kfree(dev->ifalias);
	netdev_freemem(dev);
}

Contributors
Person
Tokens
Prop
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CommitProp
Stephen Hemminger
36
85.71%
2
40.00%
Greg Kroah-Hartman
4
9.52%
1
20.00%
Eric Dumazet
1
2.38%
1
20.00%
Al Viro
1
2.38%
1
20.00%
Total
42
100.00%
5
100.00%



static const void *net_namespace(struct device *d)
{
	struct net_device *dev = to_net_dev(d);

	return dev_net(dev);
}

Contributors
Person
Tokens
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Eric W. Biedermann
26
89.66%
1
50.00%
Geliang Tang
3
10.34%
1
50.00%
Total
29
100.00%
2
100.00%


static struct class net_class = {
	.name = "net",
	.dev_release = netdev_release,
	.dev_groups = net_class_groups,
	.dev_uevent = netdev_uevent,
	.ns_type = &net_ns_type_operations,
	.namespace = net_namespace,
};

#ifdef CONFIG_OF_NET


static int of_dev_node_match(struct device *dev, const void *data)
{
	int ret = 0;

	if (dev->parent)
		ret = dev->parent->of_node == data;

	return ret == 0 ? dev->of_node == data : ret;
}

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Florian Fainelli
50
100.00%
1
100.00%
Total
50
100.00%
1
100.00%

/*
 * of_find_net_device_by_node - lookup the net device for the device node
 * @np: OF device node
 *
 * Looks up the net_device structure corresponding with the device node.
 * If successful, returns a pointer to the net_device with the embedded
 * struct device refcount incremented by one, or NULL on failure. The
 * refcount must be dropped when done with the net_device.
 */


struct net_device *of_find_net_device_by_node(struct device_node *np)
{
	struct device *dev;

	dev = class_find_device(&net_class, NULL, np, of_dev_node_match);
	if (!dev)
		return NULL;

	return to_net_dev(dev);
}
Contributors
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Florian Fainelli
45
100.00%
1
100.00%
Total
45
100.00%
1
100.00%


EXPORT_SYMBOL(of_find_net_device_by_node);
#endif

/* Delete sysfs entries but hold kobject reference until after all
 * netdev references are gone.
 */


void netdev_unregister_kobject(struct net_device *ndev)
{
	struct device *dev = &(ndev->dev);

	if (!atomic_read(&dev_net(ndev)->count))
		dev_set_uevent_suppress(dev, 1);

	kobject_get(&dev->kobj);

	remove_queue_kobjects(ndev);

	pm_runtime_set_memalloc_noio(dev, false);

	device_del(dev);
}

Contributors
Person
Tokens
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CommitProp
Andrey Vagin
21
30.88%
2
16.67%
Stephen Hemminger
18
26.47%
2
16.67%
Maneesh Soni
11
16.18%
1
8.33%
Ming Lei
7
10.29%
1
8.33%
Tom Herbert
4
5.88%
2
16.67%
Américo Wang
3
4.41%
1
8.33%
Andrey Borzenkov
2
2.94%
1
8.33%
Greg Kroah-Hartman
1
1.47%
1
8.33%
Eric W. Biedermann
1
1.47%
1
8.33%
Total
68
100.00%
12
100.00%

/* Create sysfs entries for network device. */


int netdev_register_kobject(struct net_device *ndev)
{
	struct device *dev = &(ndev->dev);
	const struct attribute_group **groups = ndev->sysfs_groups;
	int error = 0;

	device_initialize(dev);
	dev->class = &net_class;
	dev->platform_data = ndev;
	dev->groups = groups;

	dev_set_name(dev, "%s", ndev->name);

#ifdef CONFIG_SYSFS
	/* Allow for a device specific group */
	if (*groups)
		groups++;

	*groups++ = &netstat_group;

#if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211)
	if (ndev->ieee80211_ptr)
		*groups++ = &wireless_group;
#if IS_ENABLED(CONFIG_WIRELESS_EXT)
	else if (ndev->wireless_handlers)
		*groups++ = &wireless_group;
#endif
#endif
#endif /* CONFIG_SYSFS */

	error = device_add(dev);
	if (error)
		return error;

	error = register_queue_kobjects(ndev);
	if (error) {
		device_del(dev);
		return error;
	}

	pm_runtime_set_memalloc_noio(dev, true);

	return error;
}

Contributors
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Tokens
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CommitProp
Stephen Hemminger
57
30.32%
4
25.00%
Johannes Berg
48
25.53%
2
12.50%
Tom Herbert
37
19.68%
2
12.50%
Eric W. Biedermann
19
10.11%
3
18.75%
Greg Kroah-Hartman
10
5.32%
1
6.25%
Américo Wang
8
4.26%
1
6.25%
Ming Lei
7
3.72%
1
6.25%
Kay Sievers
1
0.53%
1
6.25%
David Brownell
1
0.53%
1
6.25%
Total
188
100.00%
16
100.00%



int netdev_class_create_file_ns(struct class_attribute *class_attr,
				const void *ns)
{
	return class_create_file_ns(&net_class, class_attr, ns);
}
Contributors
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Tokens
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CommitProp
Jay Vosburgh
17
65.38%
1
50.00%
Tejun Heo
9
34.62%
1
50.00%
Total
26
100.00%
2
100.00%


EXPORT_SYMBOL(netdev_class_create_file_ns);



void netdev_class_remove_file_ns(struct class_attribute *class_attr,
				 const void *ns)
{
	class_remove_file_ns(&net_class, class_attr, ns);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Jay Vosburgh
16
64.00%
1
50.00%
Tejun Heo
9
36.00%
1
50.00%
Total
25
100.00%
2
100.00%


EXPORT_SYMBOL(netdev_class_remove_file_ns);



int __init netdev_kobject_init(void)
{
	kobj_ns_type_register(&net_ns_type_operations);
	return class_register(&net_class);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Stephen Hemminger
13
61.90%
1
25.00%
Eric W. Biedermann
7
33.33%
2
50.00%
Daniel Borkmann
1
4.76%
1
25.00%
Total
21
100.00%
4
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Tom Herbert
2465
33.85%
8
6.30%
Stephen Hemminger
1254
17.22%
16
12.60%
Greg Kroah-Hartman
319
4.38%
2
1.57%
Jiri Pirko
277
3.80%
5
3.94%
John Fastabend
263
3.61%
2
1.57%
Eric W. Biedermann
248
3.41%
8
6.30%
Eric Dumazet
246
3.38%
11
8.66%
Alexander Duyck
171
2.35%
3
2.36%
Andy Gospodarek
169
2.32%
1
0.79%
Stefan Rompf
166
2.28%
1
0.79%
David Decotigny
165
2.27%
3
2.36%
Weilong Chen
147
2.02%
1
0.79%
David Ahern
108
1.48%
1
0.79%
Florian Fainelli
108
1.48%
1
0.79%
Tom Gundersen
95
1.30%
1
0.79%
Johannes Berg
94
1.29%
3
2.36%
Michael Dalton
78
1.07%
1
0.79%
Andrey Vagin
78
1.07%
2
1.57%
Anuradha Karuppiah
76
1.04%
1
0.79%
Ben Hutchings
74
1.02%
2
1.57%
Américo Wang
70
0.96%
1
0.79%
Vlad Dogaru
67
0.92%
1
0.79%
Jason (Hui) Wang
56
0.77%
1
0.79%
Tejun Heo
51
0.70%
3
2.36%
Andrew Morton
51
0.70%
1
0.79%
Nicolas Dichtel
47
0.65%
1
0.79%
Jay Vosburgh
37
0.51%
1
0.79%
Nikolay Aleksandrov
37
0.51%
1
0.79%
Al Viro
35
0.48%
3
2.36%
Scott Feldman
23
0.32%
2
1.57%
Xi Wang
23
0.32%
1
0.79%
Kay Sievers
19
0.26%
4
3.15%
Ming Lei
17
0.23%
1
0.79%
Eric Rannaud
14
0.19%
1
0.79%
Amir Vadai
12
0.16%
1
0.79%
Maneesh Soni
11
0.15%
1
0.79%
Linus Torvalds
11
0.15%
1
0.79%
Jean Tourrilhes
10
0.14%
1
0.79%
Jarod Wilson
10
0.14%
1
0.79%
David Woodhouse
9
0.12%
1
0.79%
Sasha Levin
8
0.11%
1
0.79%
Pavel Emelyanov
6
0.08%
3
2.36%
Stefan Assmann
6
0.08%
1
0.79%
Shuah Khan
6
0.08%
1
0.79%
Ido Schimmel
5
0.07%
1
0.79%
Lai Jiangshan
4
0.05%
1
0.79%
Geliang Tang
3
0.04%
1
0.79%
Paul Gortmaker
3
0.04%
1
0.79%
Ingo Molnar
3
0.04%
1
0.79%
Thadeu Lima de Souza Cascardo
3
0.04%
1
0.79%
Vadim Lobanov
3
0.04%
1
0.79%
Randy Dunlap
3
0.04%
1
0.79%
Ben Dooks
3
0.04%
1
0.79%
Michael Chan
2
0.03%
1
0.79%
Andrey Borzenkov
2
0.03%
1
0.79%
Hideaki Yoshifuji / 吉藤英明
2
0.03%
1
0.79%
Stephen Rothwell
2
0.03%
1
0.79%
Russell King
1
0.01%
1
0.79%
Adrian Bunk
1
0.01%
1
0.79%
Alexander Stein
1
0.01%
1
0.79%
David Brownell
1
0.01%
1
0.79%
Daniel Borkmann
1
0.01%
1
0.79%
Jan Engelhardt
1
0.01%
1
0.79%
Paul Bolle
1
0.01%
1
0.79%
Total
7282
100.00%
127
100.00%
Directory: net/core

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