forked from Minki/linux
cf778b00e9
commit a9b3cd7f32
(rcu: convert uses of rcu_assign_pointer(x, NULL) to
RCU_INIT_POINTER) did a lot of incorrect changes, since it did a
complete conversion of rcu_assign_pointer(x, y) to RCU_INIT_POINTER(x,
y).
We miss needed barriers, even on x86, when y is not NULL.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Stephen Hemminger <shemminger@vyatta.com>
CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1507 lines
36 KiB
C
1507 lines
36 KiB
C
/*
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* net-sysfs.c - network device class and attributes
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*
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* Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/capability.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/slab.h>
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#include <linux/nsproxy.h>
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#include <net/sock.h>
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#include <net/net_namespace.h>
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#include <linux/rtnetlink.h>
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#include <linux/wireless.h>
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#include <linux/vmalloc.h>
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#include <linux/export.h>
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#include <linux/jiffies.h>
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#include <net/wext.h>
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#include "net-sysfs.h"
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#ifdef CONFIG_SYSFS
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static const char fmt_hex[] = "%#x\n";
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static const char fmt_long_hex[] = "%#lx\n";
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static const char fmt_dec[] = "%d\n";
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static const char fmt_udec[] = "%u\n";
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static const char fmt_ulong[] = "%lu\n";
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static const char fmt_u64[] = "%llu\n";
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static inline int dev_isalive(const struct net_device *dev)
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{
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return dev->reg_state <= NETREG_REGISTERED;
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}
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/* use same locking rules as GIF* ioctl's */
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static ssize_t netdev_show(const struct device *dev,
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struct device_attribute *attr, char *buf,
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ssize_t (*format)(const struct net_device *, char *))
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{
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struct net_device *net = to_net_dev(dev);
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ssize_t ret = -EINVAL;
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read_lock(&dev_base_lock);
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if (dev_isalive(net))
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ret = (*format)(net, buf);
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read_unlock(&dev_base_lock);
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return ret;
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}
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/* generate a show function for simple field */
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#define NETDEVICE_SHOW(field, format_string) \
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static ssize_t format_##field(const struct net_device *net, char *buf) \
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{ \
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return sprintf(buf, format_string, net->field); \
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} \
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static ssize_t show_##field(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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return netdev_show(dev, attr, buf, format_##field); \
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}
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/* use same locking and permission rules as SIF* ioctl's */
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static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t len,
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int (*set)(struct net_device *, unsigned long))
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{
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struct net_device *net = to_net_dev(dev);
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char *endp;
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unsigned long new;
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int ret = -EINVAL;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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new = simple_strtoul(buf, &endp, 0);
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if (endp == buf)
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goto err;
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if (!rtnl_trylock())
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return restart_syscall();
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if (dev_isalive(net)) {
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if ((ret = (*set)(net, new)) == 0)
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ret = len;
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}
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rtnl_unlock();
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err:
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return ret;
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}
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NETDEVICE_SHOW(dev_id, fmt_hex);
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NETDEVICE_SHOW(addr_assign_type, fmt_dec);
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NETDEVICE_SHOW(addr_len, fmt_dec);
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NETDEVICE_SHOW(iflink, fmt_dec);
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NETDEVICE_SHOW(ifindex, fmt_dec);
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NETDEVICE_SHOW(type, fmt_dec);
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NETDEVICE_SHOW(link_mode, fmt_dec);
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/* use same locking rules as GIFHWADDR ioctl's */
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static ssize_t show_address(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct net_device *net = to_net_dev(dev);
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ssize_t ret = -EINVAL;
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read_lock(&dev_base_lock);
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if (dev_isalive(net))
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ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len);
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read_unlock(&dev_base_lock);
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return ret;
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}
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static ssize_t show_broadcast(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct net_device *net = to_net_dev(dev);
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if (dev_isalive(net))
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return sysfs_format_mac(buf, net->broadcast, net->addr_len);
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return -EINVAL;
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}
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static ssize_t show_carrier(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct net_device *netdev = to_net_dev(dev);
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if (netif_running(netdev)) {
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return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
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}
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return -EINVAL;
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}
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static ssize_t show_speed(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct net_device *netdev = to_net_dev(dev);
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int ret = -EINVAL;
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if (!rtnl_trylock())
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return restart_syscall();
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if (netif_running(netdev)) {
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struct ethtool_cmd cmd;
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if (!__ethtool_get_settings(netdev, &cmd))
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ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd));
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}
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rtnl_unlock();
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return ret;
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}
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static ssize_t show_duplex(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct net_device *netdev = to_net_dev(dev);
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int ret = -EINVAL;
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if (!rtnl_trylock())
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return restart_syscall();
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if (netif_running(netdev)) {
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struct ethtool_cmd cmd;
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if (!__ethtool_get_settings(netdev, &cmd))
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ret = sprintf(buf, "%s\n",
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cmd.duplex ? "full" : "half");
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}
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rtnl_unlock();
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return ret;
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}
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static ssize_t show_dormant(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct net_device *netdev = to_net_dev(dev);
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if (netif_running(netdev))
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return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
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return -EINVAL;
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}
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static const char *const operstates[] = {
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"unknown",
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"notpresent", /* currently unused */
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"down",
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"lowerlayerdown",
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"testing", /* currently unused */
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"dormant",
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"up"
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};
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static ssize_t show_operstate(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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const struct net_device *netdev = to_net_dev(dev);
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unsigned char operstate;
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read_lock(&dev_base_lock);
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operstate = netdev->operstate;
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if (!netif_running(netdev))
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operstate = IF_OPER_DOWN;
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read_unlock(&dev_base_lock);
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if (operstate >= ARRAY_SIZE(operstates))
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return -EINVAL; /* should not happen */
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return sprintf(buf, "%s\n", operstates[operstate]);
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}
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/* read-write attributes */
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NETDEVICE_SHOW(mtu, fmt_dec);
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static int change_mtu(struct net_device *net, unsigned long new_mtu)
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{
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return dev_set_mtu(net, (int) new_mtu);
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}
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static ssize_t store_mtu(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return netdev_store(dev, attr, buf, len, change_mtu);
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}
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NETDEVICE_SHOW(flags, fmt_hex);
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static int change_flags(struct net_device *net, unsigned long new_flags)
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{
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return dev_change_flags(net, (unsigned) new_flags);
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}
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static ssize_t store_flags(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return netdev_store(dev, attr, buf, len, change_flags);
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}
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NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
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static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
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{
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net->tx_queue_len = new_len;
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return 0;
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}
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static ssize_t store_tx_queue_len(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return netdev_store(dev, attr, buf, len, change_tx_queue_len);
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}
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static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t len)
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{
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struct net_device *netdev = to_net_dev(dev);
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size_t count = len;
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ssize_t ret;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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/* ignore trailing newline */
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if (len > 0 && buf[len - 1] == '\n')
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--count;
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if (!rtnl_trylock())
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return restart_syscall();
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ret = dev_set_alias(netdev, buf, count);
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rtnl_unlock();
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return ret < 0 ? ret : len;
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}
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static ssize_t show_ifalias(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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const struct net_device *netdev = to_net_dev(dev);
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ssize_t ret = 0;
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if (!rtnl_trylock())
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return restart_syscall();
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if (netdev->ifalias)
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ret = sprintf(buf, "%s\n", netdev->ifalias);
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rtnl_unlock();
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return ret;
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}
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NETDEVICE_SHOW(group, fmt_dec);
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static int change_group(struct net_device *net, unsigned long new_group)
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{
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dev_set_group(net, (int) new_group);
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return 0;
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}
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static ssize_t store_group(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return netdev_store(dev, attr, buf, len, change_group);
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}
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static struct device_attribute net_class_attributes[] = {
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__ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL),
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__ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
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__ATTR(dev_id, S_IRUGO, show_dev_id, NULL),
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__ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias),
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__ATTR(iflink, S_IRUGO, show_iflink, NULL),
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__ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
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__ATTR(type, S_IRUGO, show_type, NULL),
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__ATTR(link_mode, S_IRUGO, show_link_mode, NULL),
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__ATTR(address, S_IRUGO, show_address, NULL),
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__ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
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__ATTR(carrier, S_IRUGO, show_carrier, NULL),
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__ATTR(speed, S_IRUGO, show_speed, NULL),
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__ATTR(duplex, S_IRUGO, show_duplex, NULL),
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__ATTR(dormant, S_IRUGO, show_dormant, NULL),
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__ATTR(operstate, S_IRUGO, show_operstate, NULL),
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__ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu),
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__ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags),
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__ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
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store_tx_queue_len),
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__ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group),
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{}
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};
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/* Show a given an attribute in the statistics group */
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static ssize_t netstat_show(const struct device *d,
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struct device_attribute *attr, char *buf,
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unsigned long offset)
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{
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struct net_device *dev = to_net_dev(d);
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ssize_t ret = -EINVAL;
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WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||
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offset % sizeof(u64) != 0);
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read_lock(&dev_base_lock);
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if (dev_isalive(dev)) {
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struct rtnl_link_stats64 temp;
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const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
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ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset));
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}
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read_unlock(&dev_base_lock);
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return ret;
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}
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/* generate a read-only statistics attribute */
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#define NETSTAT_ENTRY(name) \
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static ssize_t show_##name(struct device *d, \
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struct device_attribute *attr, char *buf) \
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{ \
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return netstat_show(d, attr, buf, \
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offsetof(struct rtnl_link_stats64, name)); \
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} \
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static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
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NETSTAT_ENTRY(rx_packets);
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NETSTAT_ENTRY(tx_packets);
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NETSTAT_ENTRY(rx_bytes);
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NETSTAT_ENTRY(tx_bytes);
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NETSTAT_ENTRY(rx_errors);
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NETSTAT_ENTRY(tx_errors);
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NETSTAT_ENTRY(rx_dropped);
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NETSTAT_ENTRY(tx_dropped);
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NETSTAT_ENTRY(multicast);
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NETSTAT_ENTRY(collisions);
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NETSTAT_ENTRY(rx_length_errors);
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NETSTAT_ENTRY(rx_over_errors);
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NETSTAT_ENTRY(rx_crc_errors);
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NETSTAT_ENTRY(rx_frame_errors);
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NETSTAT_ENTRY(rx_fifo_errors);
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NETSTAT_ENTRY(rx_missed_errors);
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NETSTAT_ENTRY(tx_aborted_errors);
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NETSTAT_ENTRY(tx_carrier_errors);
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NETSTAT_ENTRY(tx_fifo_errors);
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NETSTAT_ENTRY(tx_heartbeat_errors);
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NETSTAT_ENTRY(tx_window_errors);
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NETSTAT_ENTRY(rx_compressed);
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NETSTAT_ENTRY(tx_compressed);
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static struct attribute *netstat_attrs[] = {
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&dev_attr_rx_packets.attr,
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&dev_attr_tx_packets.attr,
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&dev_attr_rx_bytes.attr,
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&dev_attr_tx_bytes.attr,
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&dev_attr_rx_errors.attr,
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&dev_attr_tx_errors.attr,
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&dev_attr_rx_dropped.attr,
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&dev_attr_tx_dropped.attr,
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&dev_attr_multicast.attr,
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&dev_attr_collisions.attr,
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&dev_attr_rx_length_errors.attr,
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&dev_attr_rx_over_errors.attr,
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&dev_attr_rx_crc_errors.attr,
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&dev_attr_rx_frame_errors.attr,
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&dev_attr_rx_fifo_errors.attr,
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&dev_attr_rx_missed_errors.attr,
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&dev_attr_tx_aborted_errors.attr,
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&dev_attr_tx_carrier_errors.attr,
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&dev_attr_tx_fifo_errors.attr,
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&dev_attr_tx_heartbeat_errors.attr,
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&dev_attr_tx_window_errors.attr,
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&dev_attr_rx_compressed.attr,
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&dev_attr_tx_compressed.attr,
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NULL
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};
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static struct attribute_group netstat_group = {
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.name = "statistics",
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.attrs = netstat_attrs,
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};
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#ifdef CONFIG_WIRELESS_EXT_SYSFS
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/* helper function that does all the locking etc for wireless stats */
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static ssize_t wireless_show(struct device *d, char *buf,
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ssize_t (*format)(const struct iw_statistics *,
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char *))
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{
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struct net_device *dev = to_net_dev(d);
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const struct iw_statistics *iw;
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ssize_t ret = -EINVAL;
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if (!rtnl_trylock())
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return restart_syscall();
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if (dev_isalive(dev)) {
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iw = get_wireless_stats(dev);
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if (iw)
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ret = (*format)(iw, buf);
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}
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rtnl_unlock();
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return ret;
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}
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/* show function template for wireless fields */
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#define WIRELESS_SHOW(name, field, format_string) \
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static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \
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{ \
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return sprintf(buf, format_string, iw->field); \
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} \
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static ssize_t show_iw_##name(struct device *d, \
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struct device_attribute *attr, char *buf) \
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{ \
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return wireless_show(d, buf, format_iw_##name); \
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} \
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static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
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WIRELESS_SHOW(status, status, fmt_hex);
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WIRELESS_SHOW(link, qual.qual, fmt_dec);
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WIRELESS_SHOW(level, qual.level, fmt_dec);
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WIRELESS_SHOW(noise, qual.noise, fmt_dec);
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WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
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WIRELESS_SHOW(crypt, discard.code, fmt_dec);
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WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
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WIRELESS_SHOW(misc, discard.misc, fmt_dec);
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WIRELESS_SHOW(retries, discard.retries, fmt_dec);
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WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
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static struct attribute *wireless_attrs[] = {
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&dev_attr_status.attr,
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&dev_attr_link.attr,
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&dev_attr_level.attr,
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&dev_attr_noise.attr,
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&dev_attr_nwid.attr,
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&dev_attr_crypt.attr,
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&dev_attr_fragment.attr,
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&dev_attr_retries.attr,
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&dev_attr_misc.attr,
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&dev_attr_beacon.attr,
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NULL
|
|
};
|
|
|
|
static struct attribute_group wireless_group = {
|
|
.name = "wireless",
|
|
.attrs = wireless_attrs,
|
|
};
|
|
#endif
|
|
#endif /* CONFIG_SYSFS */
|
|
|
|
#ifdef CONFIG_RPS
|
|
/*
|
|
* RX queue sysfs structures and functions.
|
|
*/
|
|
struct rx_queue_attribute {
|
|
struct attribute attr;
|
|
ssize_t (*show)(struct netdev_rx_queue *queue,
|
|
struct rx_queue_attribute *attr, char *buf);
|
|
ssize_t (*store)(struct netdev_rx_queue *queue,
|
|
struct rx_queue_attribute *attr, const char *buf, size_t len);
|
|
};
|
|
#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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static const struct sysfs_ops rx_queue_sysfs_ops = {
|
|
.show = rx_queue_attr_show,
|
|
.store = rx_queue_attr_store,
|
|
};
|
|
|
|
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;
|
|
size_t len = 0;
|
|
int i;
|
|
|
|
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 += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
|
|
if (PAGE_SIZE - len < 3) {
|
|
rcu_read_unlock();
|
|
free_cpumask_var(mask);
|
|
return -EINVAL;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
free_cpumask_var(mask);
|
|
len += sprintf(buf + len, "\n");
|
|
return len;
|
|
}
|
|
|
|
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_SPINLOCK(rps_map_lock);
|
|
|
|
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,
|
|
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;
|
|
}
|
|
|
|
spin_lock(&rps_map_lock);
|
|
old_map = rcu_dereference_protected(queue->rps_map,
|
|
lockdep_is_held(&rps_map_lock));
|
|
rcu_assign_pointer(queue->rps_map, map);
|
|
spin_unlock(&rps_map_lock);
|
|
|
|
if (map)
|
|
jump_label_inc(&rps_needed);
|
|
if (old_map) {
|
|
kfree_rcu(old_map, rcu);
|
|
jump_label_dec(&rps_needed);
|
|
}
|
|
free_cpumask_var(mask);
|
|
return len;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static void rps_dev_flow_table_release_work(struct work_struct *work)
|
|
{
|
|
struct rps_dev_flow_table *table = container_of(work,
|
|
struct rps_dev_flow_table, free_work);
|
|
|
|
vfree(table);
|
|
}
|
|
|
|
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);
|
|
|
|
INIT_WORK(&table->free_work, rps_dev_flow_table_release_work);
|
|
schedule_work(&table->free_work);
|
|
}
|
|
|
|
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)
|
|
* doesnt 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;
|
|
}
|
|
|
|
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);
|
|
|
|
static struct attribute *rx_queue_default_attrs[] = {
|
|
&rps_cpus_attribute.attr,
|
|
&rps_dev_flow_table_cnt_attribute.attr,
|
|
NULL
|
|
};
|
|
|
|
static void rx_queue_release(struct kobject *kobj)
|
|
{
|
|
struct netdev_rx_queue *queue = to_rx_queue(kobj);
|
|
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);
|
|
}
|
|
|
|
memset(kobj, 0, sizeof(*kobj));
|
|
dev_put(queue->dev);
|
|
}
|
|
|
|
static struct kobj_type rx_queue_ktype = {
|
|
.sysfs_ops = &rx_queue_sysfs_ops,
|
|
.release = rx_queue_release,
|
|
.default_attrs = rx_queue_default_attrs,
|
|
};
|
|
|
|
static int rx_queue_add_kobject(struct net_device *net, int index)
|
|
{
|
|
struct netdev_rx_queue *queue = net->_rx + index;
|
|
struct kobject *kobj = &queue->kobj;
|
|
int error = 0;
|
|
|
|
kobj->kset = net->queues_kset;
|
|
error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
|
|
"rx-%u", index);
|
|
if (error) {
|
|
kobject_put(kobj);
|
|
return error;
|
|
}
|
|
|
|
kobject_uevent(kobj, KOBJ_ADD);
|
|
dev_hold(queue->dev);
|
|
|
|
return error;
|
|
}
|
|
#endif /* CONFIG_RPS */
|
|
|
|
int
|
|
net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
|
|
{
|
|
#ifdef CONFIG_RPS
|
|
int i;
|
|
int error = 0;
|
|
|
|
for (i = old_num; i < new_num; i++) {
|
|
error = rx_queue_add_kobject(net, i);
|
|
if (error) {
|
|
new_num = old_num;
|
|
break;
|
|
}
|
|
}
|
|
|
|
while (--i >= new_num)
|
|
kobject_put(&net->_rx[i].kobj);
|
|
|
|
return error;
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
#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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static struct netdev_queue_attribute queue_trans_timeout =
|
|
__ATTR(tx_timeout, S_IRUGO, show_trans_timeout, 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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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));
|
|
}
|
|
|
|
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 value;
|
|
int err;
|
|
|
|
err = kstrtouint(buf, 10, &value);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
dql->slack_hold_time = msecs_to_jiffies(value);
|
|
|
|
return len;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static struct netdev_queue_attribute bql_inflight_attribute =
|
|
__ATTR(inflight, S_IRUGO | S_IWUSR, 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 inline unsigned int get_netdev_queue_index(struct netdev_queue *queue)
|
|
{
|
|
struct net_device *dev = queue->dev;
|
|
int i;
|
|
|
|
for (i = 0; i < dev->num_tx_queues; i++)
|
|
if (queue == &dev->_tx[i])
|
|
break;
|
|
|
|
BUG_ON(i >= dev->num_tx_queues);
|
|
|
|
return i;
|
|
}
|
|
|
|
|
|
static ssize_t show_xps_map(struct netdev_queue *queue,
|
|
struct netdev_queue_attribute *attribute, char *buf)
|
|
{
|
|
struct net_device *dev = queue->dev;
|
|
struct xps_dev_maps *dev_maps;
|
|
cpumask_var_t mask;
|
|
unsigned long index;
|
|
size_t len = 0;
|
|
int i;
|
|
|
|
if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
|
|
return -ENOMEM;
|
|
|
|
index = get_netdev_queue_index(queue);
|
|
|
|
rcu_read_lock();
|
|
dev_maps = rcu_dereference(dev->xps_maps);
|
|
if (dev_maps) {
|
|
for_each_possible_cpu(i) {
|
|
struct xps_map *map =
|
|
rcu_dereference(dev_maps->cpu_map[i]);
|
|
if (map) {
|
|
int j;
|
|
for (j = 0; j < map->len; j++) {
|
|
if (map->queues[j] == index) {
|
|
cpumask_set_cpu(i, mask);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
|
|
if (PAGE_SIZE - len < 3) {
|
|
free_cpumask_var(mask);
|
|
return -EINVAL;
|
|
}
|
|
|
|
free_cpumask_var(mask);
|
|
len += sprintf(buf + len, "\n");
|
|
return len;
|
|
}
|
|
|
|
static DEFINE_MUTEX(xps_map_mutex);
|
|
#define xmap_dereference(P) \
|
|
rcu_dereference_protected((P), lockdep_is_held(&xps_map_mutex))
|
|
|
|
static void xps_queue_release(struct netdev_queue *queue)
|
|
{
|
|
struct net_device *dev = queue->dev;
|
|
struct xps_dev_maps *dev_maps;
|
|
struct xps_map *map;
|
|
unsigned long index;
|
|
int i, pos, nonempty = 0;
|
|
|
|
index = get_netdev_queue_index(queue);
|
|
|
|
mutex_lock(&xps_map_mutex);
|
|
dev_maps = xmap_dereference(dev->xps_maps);
|
|
|
|
if (dev_maps) {
|
|
for_each_possible_cpu(i) {
|
|
map = xmap_dereference(dev_maps->cpu_map[i]);
|
|
if (!map)
|
|
continue;
|
|
|
|
for (pos = 0; pos < map->len; pos++)
|
|
if (map->queues[pos] == index)
|
|
break;
|
|
|
|
if (pos < map->len) {
|
|
if (map->len > 1)
|
|
map->queues[pos] =
|
|
map->queues[--map->len];
|
|
else {
|
|
RCU_INIT_POINTER(dev_maps->cpu_map[i],
|
|
NULL);
|
|
kfree_rcu(map, rcu);
|
|
map = NULL;
|
|
}
|
|
}
|
|
if (map)
|
|
nonempty = 1;
|
|
}
|
|
|
|
if (!nonempty) {
|
|
RCU_INIT_POINTER(dev->xps_maps, NULL);
|
|
kfree_rcu(dev_maps, rcu);
|
|
}
|
|
}
|
|
mutex_unlock(&xps_map_mutex);
|
|
}
|
|
|
|
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;
|
|
cpumask_var_t mask;
|
|
int err, i, cpu, pos, map_len, alloc_len, need_set;
|
|
unsigned long index;
|
|
struct xps_map *map, *new_map;
|
|
struct xps_dev_maps *dev_maps, *new_dev_maps;
|
|
int nonempty = 0;
|
|
int numa_node_id = -2;
|
|
|
|
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;
|
|
}
|
|
|
|
new_dev_maps = kzalloc(max_t(unsigned,
|
|
XPS_DEV_MAPS_SIZE, L1_CACHE_BYTES), GFP_KERNEL);
|
|
if (!new_dev_maps) {
|
|
free_cpumask_var(mask);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mutex_lock(&xps_map_mutex);
|
|
|
|
dev_maps = xmap_dereference(dev->xps_maps);
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
map = dev_maps ?
|
|
xmap_dereference(dev_maps->cpu_map[cpu]) : NULL;
|
|
new_map = map;
|
|
if (map) {
|
|
for (pos = 0; pos < map->len; pos++)
|
|
if (map->queues[pos] == index)
|
|
break;
|
|
map_len = map->len;
|
|
alloc_len = map->alloc_len;
|
|
} else
|
|
pos = map_len = alloc_len = 0;
|
|
|
|
need_set = cpumask_test_cpu(cpu, mask) && cpu_online(cpu);
|
|
#ifdef CONFIG_NUMA
|
|
if (need_set) {
|
|
if (numa_node_id == -2)
|
|
numa_node_id = cpu_to_node(cpu);
|
|
else if (numa_node_id != cpu_to_node(cpu))
|
|
numa_node_id = -1;
|
|
}
|
|
#endif
|
|
if (need_set && pos >= map_len) {
|
|
/* Need to add queue to this CPU's map */
|
|
if (map_len >= alloc_len) {
|
|
alloc_len = alloc_len ?
|
|
2 * alloc_len : XPS_MIN_MAP_ALLOC;
|
|
new_map = kzalloc_node(XPS_MAP_SIZE(alloc_len),
|
|
GFP_KERNEL,
|
|
cpu_to_node(cpu));
|
|
if (!new_map)
|
|
goto error;
|
|
new_map->alloc_len = alloc_len;
|
|
for (i = 0; i < map_len; i++)
|
|
new_map->queues[i] = map->queues[i];
|
|
new_map->len = map_len;
|
|
}
|
|
new_map->queues[new_map->len++] = index;
|
|
} else if (!need_set && pos < map_len) {
|
|
/* Need to remove queue from this CPU's map */
|
|
if (map_len > 1)
|
|
new_map->queues[pos] =
|
|
new_map->queues[--new_map->len];
|
|
else
|
|
new_map = NULL;
|
|
}
|
|
RCU_INIT_POINTER(new_dev_maps->cpu_map[cpu], new_map);
|
|
}
|
|
|
|
/* Cleanup old maps */
|
|
for_each_possible_cpu(cpu) {
|
|
map = dev_maps ?
|
|
xmap_dereference(dev_maps->cpu_map[cpu]) : NULL;
|
|
if (map && xmap_dereference(new_dev_maps->cpu_map[cpu]) != map)
|
|
kfree_rcu(map, rcu);
|
|
if (new_dev_maps->cpu_map[cpu])
|
|
nonempty = 1;
|
|
}
|
|
|
|
if (nonempty) {
|
|
rcu_assign_pointer(dev->xps_maps, new_dev_maps);
|
|
} else {
|
|
kfree(new_dev_maps);
|
|
RCU_INIT_POINTER(dev->xps_maps, NULL);
|
|
}
|
|
|
|
if (dev_maps)
|
|
kfree_rcu(dev_maps, rcu);
|
|
|
|
netdev_queue_numa_node_write(queue, (numa_node_id >= 0) ? numa_node_id :
|
|
NUMA_NO_NODE);
|
|
|
|
mutex_unlock(&xps_map_mutex);
|
|
|
|
free_cpumask_var(mask);
|
|
return len;
|
|
|
|
error:
|
|
mutex_unlock(&xps_map_mutex);
|
|
|
|
if (new_dev_maps)
|
|
for_each_possible_cpu(i)
|
|
kfree(rcu_dereference_protected(
|
|
new_dev_maps->cpu_map[i],
|
|
1));
|
|
kfree(new_dev_maps);
|
|
free_cpumask_var(mask);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
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,
|
|
#ifdef CONFIG_XPS
|
|
&xps_cpus_attribute.attr,
|
|
#endif
|
|
NULL
|
|
};
|
|
|
|
static void netdev_queue_release(struct kobject *kobj)
|
|
{
|
|
struct netdev_queue *queue = to_netdev_queue(kobj);
|
|
|
|
#ifdef CONFIG_XPS
|
|
xps_queue_release(queue);
|
|
#endif
|
|
|
|
memset(kobj, 0, sizeof(*kobj));
|
|
dev_put(queue->dev);
|
|
}
|
|
|
|
static struct kobj_type netdev_queue_ktype = {
|
|
.sysfs_ops = &netdev_queue_sysfs_ops,
|
|
.release = netdev_queue_release,
|
|
.default_attrs = netdev_queue_default_attrs,
|
|
};
|
|
|
|
static int netdev_queue_add_kobject(struct net_device *net, int index)
|
|
{
|
|
struct netdev_queue *queue = net->_tx + index;
|
|
struct kobject *kobj = &queue->kobj;
|
|
int error = 0;
|
|
|
|
kobj->kset = net->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;
|
|
}
|
|
#endif /* CONFIG_SYSFS */
|
|
|
|
int
|
|
netdev_queue_update_kobjects(struct net_device *net, 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(net, i);
|
|
if (error) {
|
|
new_num = old_num;
|
|
break;
|
|
}
|
|
}
|
|
|
|
while (--i >= new_num) {
|
|
struct netdev_queue *queue = net->_tx + i;
|
|
|
|
#ifdef CONFIG_BQL
|
|
sysfs_remove_group(&queue->kobj, &dql_group);
|
|
#endif
|
|
kobject_put(&queue->kobj);
|
|
}
|
|
|
|
return error;
|
|
#else
|
|
return 0;
|
|
#endif /* CONFIG_SYSFS */
|
|
}
|
|
|
|
static int register_queue_kobjects(struct net_device *net)
|
|
{
|
|
int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;
|
|
|
|
#ifdef CONFIG_SYSFS
|
|
net->queues_kset = kset_create_and_add("queues",
|
|
NULL, &net->dev.kobj);
|
|
if (!net->queues_kset)
|
|
return -ENOMEM;
|
|
#endif
|
|
|
|
#ifdef CONFIG_RPS
|
|
real_rx = net->real_num_rx_queues;
|
|
#endif
|
|
real_tx = net->real_num_tx_queues;
|
|
|
|
error = net_rx_queue_update_kobjects(net, 0, real_rx);
|
|
if (error)
|
|
goto error;
|
|
rxq = real_rx;
|
|
|
|
error = netdev_queue_update_kobjects(net, 0, real_tx);
|
|
if (error)
|
|
goto error;
|
|
txq = real_tx;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
netdev_queue_update_kobjects(net, txq, 0);
|
|
net_rx_queue_update_kobjects(net, rxq, 0);
|
|
return error;
|
|
}
|
|
|
|
static void remove_queue_kobjects(struct net_device *net)
|
|
{
|
|
int real_rx = 0, real_tx = 0;
|
|
|
|
#ifdef CONFIG_RPS
|
|
real_rx = net->real_num_rx_queues;
|
|
#endif
|
|
real_tx = net->real_num_tx_queues;
|
|
|
|
net_rx_queue_update_kobjects(net, real_rx, 0);
|
|
netdev_queue_update_kobjects(net, real_tx, 0);
|
|
#ifdef CONFIG_SYSFS
|
|
kset_unregister(net->queues_kset);
|
|
#endif
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static const void *net_initial_ns(void)
|
|
{
|
|
return &init_net;
|
|
}
|
|
|
|
static const void *net_netlink_ns(struct sock *sk)
|
|
{
|
|
return sock_net(sk);
|
|
}
|
|
|
|
struct kobj_ns_type_operations net_ns_type_operations = {
|
|
.type = KOBJ_NS_TYPE_NET,
|
|
.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);
|
|
|
|
#ifdef CONFIG_HOTPLUG
|
|
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;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* 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);
|
|
kfree((char *)dev - dev->padded);
|
|
}
|
|
|
|
static const void *net_namespace(struct device *d)
|
|
{
|
|
struct net_device *dev;
|
|
dev = container_of(d, struct net_device, dev);
|
|
return dev_net(dev);
|
|
}
|
|
|
|
static struct class net_class = {
|
|
.name = "net",
|
|
.dev_release = netdev_release,
|
|
#ifdef CONFIG_SYSFS
|
|
.dev_attrs = net_class_attributes,
|
|
#endif /* CONFIG_SYSFS */
|
|
#ifdef CONFIG_HOTPLUG
|
|
.dev_uevent = netdev_uevent,
|
|
#endif
|
|
.ns_type = &net_ns_type_operations,
|
|
.namespace = net_namespace,
|
|
};
|
|
|
|
/* Delete sysfs entries but hold kobject reference until after all
|
|
* netdev references are gone.
|
|
*/
|
|
void netdev_unregister_kobject(struct net_device * net)
|
|
{
|
|
struct device *dev = &(net->dev);
|
|
|
|
kobject_get(&dev->kobj);
|
|
|
|
remove_queue_kobjects(net);
|
|
|
|
device_del(dev);
|
|
}
|
|
|
|
/* Create sysfs entries for network device. */
|
|
int netdev_register_kobject(struct net_device *net)
|
|
{
|
|
struct device *dev = &(net->dev);
|
|
const struct attribute_group **groups = net->sysfs_groups;
|
|
int error = 0;
|
|
|
|
device_initialize(dev);
|
|
dev->class = &net_class;
|
|
dev->platform_data = net;
|
|
dev->groups = groups;
|
|
|
|
dev_set_name(dev, "%s", net->name);
|
|
|
|
#ifdef CONFIG_SYSFS
|
|
/* Allow for a device specific group */
|
|
if (*groups)
|
|
groups++;
|
|
|
|
*groups++ = &netstat_group;
|
|
#ifdef CONFIG_WIRELESS_EXT_SYSFS
|
|
if (net->ieee80211_ptr)
|
|
*groups++ = &wireless_group;
|
|
#ifdef CONFIG_WIRELESS_EXT
|
|
else if (net->wireless_handlers)
|
|
*groups++ = &wireless_group;
|
|
#endif
|
|
#endif
|
|
#endif /* CONFIG_SYSFS */
|
|
|
|
error = device_add(dev);
|
|
if (error)
|
|
return error;
|
|
|
|
error = register_queue_kobjects(net);
|
|
if (error) {
|
|
device_del(dev);
|
|
return error;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
int netdev_class_create_file(struct class_attribute *class_attr)
|
|
{
|
|
return class_create_file(&net_class, class_attr);
|
|
}
|
|
EXPORT_SYMBOL(netdev_class_create_file);
|
|
|
|
void netdev_class_remove_file(struct class_attribute *class_attr)
|
|
{
|
|
class_remove_file(&net_class, class_attr);
|
|
}
|
|
EXPORT_SYMBOL(netdev_class_remove_file);
|
|
|
|
int netdev_kobject_init(void)
|
|
{
|
|
kobj_ns_type_register(&net_ns_type_operations);
|
|
return class_register(&net_class);
|
|
}
|