11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * net-sysfs.c - network device class and attributes 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 71da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 81da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 91da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 124fc268d2SRandy Dunlap #include <linux/capability.h> 131da177e4SLinus Torvalds #include <linux/kernel.h> 141da177e4SLinus Torvalds #include <linux/netdevice.h> 151da177e4SLinus Torvalds #include <linux/if_arp.h> 161da177e4SLinus Torvalds #include <net/sock.h> 171da177e4SLinus Torvalds #include <linux/rtnetlink.h> 181da177e4SLinus Torvalds #include <linux/wireless.h> 196dd214b5SAndrey Borzenkov #include <net/iw_handler.h> 201da177e4SLinus Torvalds 21342709efSPavel Emelyanov #include "net-sysfs.h" 22342709efSPavel Emelyanov 238b41d188SEric W. Biederman #ifdef CONFIG_SYSFS 241da177e4SLinus Torvalds static const char fmt_hex[] = "%#x\n"; 25d1102b59SDavid S. Miller static const char fmt_long_hex[] = "%#lx\n"; 261da177e4SLinus Torvalds static const char fmt_dec[] = "%d\n"; 271da177e4SLinus Torvalds static const char fmt_ulong[] = "%lu\n"; 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds static inline int dev_isalive(const struct net_device *dev) 301da177e4SLinus Torvalds { 31fe9925b5SStephen Hemminger return dev->reg_state <= NETREG_REGISTERED; 321da177e4SLinus Torvalds } 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds /* use same locking rules as GIF* ioctl's */ 3543cb76d9SGreg Kroah-Hartman static ssize_t netdev_show(const struct device *dev, 3643cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf, 371da177e4SLinus Torvalds ssize_t (*format)(const struct net_device *, char *)) 381da177e4SLinus Torvalds { 3943cb76d9SGreg Kroah-Hartman struct net_device *net = to_net_dev(dev); 401da177e4SLinus Torvalds ssize_t ret = -EINVAL; 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds read_lock(&dev_base_lock); 431da177e4SLinus Torvalds if (dev_isalive(net)) 441da177e4SLinus Torvalds ret = (*format)(net, buf); 451da177e4SLinus Torvalds read_unlock(&dev_base_lock); 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds return ret; 481da177e4SLinus Torvalds } 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds /* generate a show function for simple field */ 511da177e4SLinus Torvalds #define NETDEVICE_SHOW(field, format_string) \ 521da177e4SLinus Torvalds static ssize_t format_##field(const struct net_device *net, char *buf) \ 531da177e4SLinus Torvalds { \ 541da177e4SLinus Torvalds return sprintf(buf, format_string, net->field); \ 551da177e4SLinus Torvalds } \ 5643cb76d9SGreg Kroah-Hartman static ssize_t show_##field(struct device *dev, \ 5743cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) \ 581da177e4SLinus Torvalds { \ 5943cb76d9SGreg Kroah-Hartman return netdev_show(dev, attr, buf, format_##field); \ 601da177e4SLinus Torvalds } 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds /* use same locking and permission rules as SIF* ioctl's */ 6443cb76d9SGreg Kroah-Hartman static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, 651da177e4SLinus Torvalds const char *buf, size_t len, 661da177e4SLinus Torvalds int (*set)(struct net_device *, unsigned long)) 671da177e4SLinus Torvalds { 681da177e4SLinus Torvalds struct net_device *net = to_net_dev(dev); 691da177e4SLinus Torvalds char *endp; 701da177e4SLinus Torvalds unsigned long new; 711da177e4SLinus Torvalds int ret = -EINVAL; 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 741da177e4SLinus Torvalds return -EPERM; 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds new = simple_strtoul(buf, &endp, 0); 771da177e4SLinus Torvalds if (endp == buf) 781da177e4SLinus Torvalds goto err; 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds rtnl_lock(); 811da177e4SLinus Torvalds if (dev_isalive(net)) { 821da177e4SLinus Torvalds if ((ret = (*set)(net, new)) == 0) 831da177e4SLinus Torvalds ret = len; 841da177e4SLinus Torvalds } 851da177e4SLinus Torvalds rtnl_unlock(); 861da177e4SLinus Torvalds err: 871da177e4SLinus Torvalds return ret; 881da177e4SLinus Torvalds } 891da177e4SLinus Torvalds 909d29672cSDavid Woodhouse NETDEVICE_SHOW(dev_id, fmt_hex); 91fd586bacSKay Sievers NETDEVICE_SHOW(addr_len, fmt_dec); 92fd586bacSKay Sievers NETDEVICE_SHOW(iflink, fmt_dec); 93fd586bacSKay Sievers NETDEVICE_SHOW(ifindex, fmt_dec); 94fd586bacSKay Sievers NETDEVICE_SHOW(features, fmt_long_hex); 95fd586bacSKay Sievers NETDEVICE_SHOW(type, fmt_dec); 96b00055aaSStefan Rompf NETDEVICE_SHOW(link_mode, fmt_dec); 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds /* use same locking rules as GIFHWADDR ioctl's */ 9943cb76d9SGreg Kroah-Hartman static ssize_t show_address(struct device *dev, struct device_attribute *attr, 10043cb76d9SGreg Kroah-Hartman char *buf) 1011da177e4SLinus Torvalds { 1021da177e4SLinus Torvalds struct net_device *net = to_net_dev(dev); 1031da177e4SLinus Torvalds ssize_t ret = -EINVAL; 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds read_lock(&dev_base_lock); 1061da177e4SLinus Torvalds if (dev_isalive(net)) 1077ffc49a6SMichael Chan ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); 1081da177e4SLinus Torvalds read_unlock(&dev_base_lock); 1091da177e4SLinus Torvalds return ret; 1101da177e4SLinus Torvalds } 1111da177e4SLinus Torvalds 11243cb76d9SGreg Kroah-Hartman static ssize_t show_broadcast(struct device *dev, 11343cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 1141da177e4SLinus Torvalds { 1151da177e4SLinus Torvalds struct net_device *net = to_net_dev(dev); 1161da177e4SLinus Torvalds if (dev_isalive(net)) 1177ffc49a6SMichael Chan return sysfs_format_mac(buf, net->broadcast, net->addr_len); 1181da177e4SLinus Torvalds return -EINVAL; 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 12143cb76d9SGreg Kroah-Hartman static ssize_t show_carrier(struct device *dev, 12243cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 1231da177e4SLinus Torvalds { 1241da177e4SLinus Torvalds struct net_device *netdev = to_net_dev(dev); 1251da177e4SLinus Torvalds if (netif_running(netdev)) { 1261da177e4SLinus Torvalds return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds return -EINVAL; 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 13143cb76d9SGreg Kroah-Hartman static ssize_t show_dormant(struct device *dev, 13243cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 133b00055aaSStefan Rompf { 134b00055aaSStefan Rompf struct net_device *netdev = to_net_dev(dev); 135b00055aaSStefan Rompf 136b00055aaSStefan Rompf if (netif_running(netdev)) 137b00055aaSStefan Rompf return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); 138b00055aaSStefan Rompf 139b00055aaSStefan Rompf return -EINVAL; 140b00055aaSStefan Rompf } 141b00055aaSStefan Rompf 142b00055aaSStefan Rompf static const char *operstates[] = { 143b00055aaSStefan Rompf "unknown", 144b00055aaSStefan Rompf "notpresent", /* currently unused */ 145b00055aaSStefan Rompf "down", 146b00055aaSStefan Rompf "lowerlayerdown", 147b00055aaSStefan Rompf "testing", /* currently unused */ 148b00055aaSStefan Rompf "dormant", 149b00055aaSStefan Rompf "up" 150b00055aaSStefan Rompf }; 151b00055aaSStefan Rompf 15243cb76d9SGreg Kroah-Hartman static ssize_t show_operstate(struct device *dev, 15343cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 154b00055aaSStefan Rompf { 155b00055aaSStefan Rompf const struct net_device *netdev = to_net_dev(dev); 156b00055aaSStefan Rompf unsigned char operstate; 157b00055aaSStefan Rompf 158b00055aaSStefan Rompf read_lock(&dev_base_lock); 159b00055aaSStefan Rompf operstate = netdev->operstate; 160b00055aaSStefan Rompf if (!netif_running(netdev)) 161b00055aaSStefan Rompf operstate = IF_OPER_DOWN; 162b00055aaSStefan Rompf read_unlock(&dev_base_lock); 163b00055aaSStefan Rompf 164e3a5cd9eSAdrian Bunk if (operstate >= ARRAY_SIZE(operstates)) 165b00055aaSStefan Rompf return -EINVAL; /* should not happen */ 166b00055aaSStefan Rompf 167b00055aaSStefan Rompf return sprintf(buf, "%s\n", operstates[operstate]); 168b00055aaSStefan Rompf } 169b00055aaSStefan Rompf 1701da177e4SLinus Torvalds /* read-write attributes */ 1711da177e4SLinus Torvalds NETDEVICE_SHOW(mtu, fmt_dec); 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds static int change_mtu(struct net_device *net, unsigned long new_mtu) 1741da177e4SLinus Torvalds { 1751da177e4SLinus Torvalds return dev_set_mtu(net, (int) new_mtu); 1761da177e4SLinus Torvalds } 1771da177e4SLinus Torvalds 17843cb76d9SGreg Kroah-Hartman static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, 17943cb76d9SGreg Kroah-Hartman const char *buf, size_t len) 1801da177e4SLinus Torvalds { 18143cb76d9SGreg Kroah-Hartman return netdev_store(dev, attr, buf, len, change_mtu); 1821da177e4SLinus Torvalds } 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds NETDEVICE_SHOW(flags, fmt_hex); 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds static int change_flags(struct net_device *net, unsigned long new_flags) 1871da177e4SLinus Torvalds { 1881da177e4SLinus Torvalds return dev_change_flags(net, (unsigned) new_flags); 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds 19143cb76d9SGreg Kroah-Hartman static ssize_t store_flags(struct device *dev, struct device_attribute *attr, 19243cb76d9SGreg Kroah-Hartman const char *buf, size_t len) 1931da177e4SLinus Torvalds { 19443cb76d9SGreg Kroah-Hartman return netdev_store(dev, attr, buf, len, change_flags); 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds NETDEVICE_SHOW(tx_queue_len, fmt_ulong); 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds static int change_tx_queue_len(struct net_device *net, unsigned long new_len) 2001da177e4SLinus Torvalds { 2011da177e4SLinus Torvalds net->tx_queue_len = new_len; 2021da177e4SLinus Torvalds return 0; 2031da177e4SLinus Torvalds } 2041da177e4SLinus Torvalds 20543cb76d9SGreg Kroah-Hartman static ssize_t store_tx_queue_len(struct device *dev, 20643cb76d9SGreg Kroah-Hartman struct device_attribute *attr, 20743cb76d9SGreg Kroah-Hartman const char *buf, size_t len) 2081da177e4SLinus Torvalds { 20943cb76d9SGreg Kroah-Hartman return netdev_store(dev, attr, buf, len, change_tx_queue_len); 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds 2120b815a1aSStephen Hemminger static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr, 2130b815a1aSStephen Hemminger const char *buf, size_t len) 2140b815a1aSStephen Hemminger { 2150b815a1aSStephen Hemminger struct net_device *netdev = to_net_dev(dev); 2160b815a1aSStephen Hemminger size_t count = len; 2170b815a1aSStephen Hemminger ssize_t ret; 2180b815a1aSStephen Hemminger 2190b815a1aSStephen Hemminger if (!capable(CAP_NET_ADMIN)) 2200b815a1aSStephen Hemminger return -EPERM; 2210b815a1aSStephen Hemminger 2220b815a1aSStephen Hemminger /* ignore trailing newline */ 2230b815a1aSStephen Hemminger if (len > 0 && buf[len - 1] == '\n') 2240b815a1aSStephen Hemminger --count; 2250b815a1aSStephen Hemminger 2260b815a1aSStephen Hemminger rtnl_lock(); 2270b815a1aSStephen Hemminger ret = dev_set_alias(netdev, buf, count); 2280b815a1aSStephen Hemminger rtnl_unlock(); 2290b815a1aSStephen Hemminger 2300b815a1aSStephen Hemminger return ret < 0 ? ret : len; 2310b815a1aSStephen Hemminger } 2320b815a1aSStephen Hemminger 2330b815a1aSStephen Hemminger static ssize_t show_ifalias(struct device *dev, 2340b815a1aSStephen Hemminger struct device_attribute *attr, char *buf) 2350b815a1aSStephen Hemminger { 2360b815a1aSStephen Hemminger const struct net_device *netdev = to_net_dev(dev); 2370b815a1aSStephen Hemminger ssize_t ret = 0; 2380b815a1aSStephen Hemminger 2390b815a1aSStephen Hemminger rtnl_lock(); 2400b815a1aSStephen Hemminger if (netdev->ifalias) 2410b815a1aSStephen Hemminger ret = sprintf(buf, "%s\n", netdev->ifalias); 2420b815a1aSStephen Hemminger rtnl_unlock(); 2430b815a1aSStephen Hemminger return ret; 2440b815a1aSStephen Hemminger } 2450b815a1aSStephen Hemminger 24643cb76d9SGreg Kroah-Hartman static struct device_attribute net_class_attributes[] = { 247fd586bacSKay Sievers __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), 2489d29672cSDavid Woodhouse __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), 2490b815a1aSStephen Hemminger __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), 250fd586bacSKay Sievers __ATTR(iflink, S_IRUGO, show_iflink, NULL), 251fd586bacSKay Sievers __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), 252fd586bacSKay Sievers __ATTR(features, S_IRUGO, show_features, NULL), 253fd586bacSKay Sievers __ATTR(type, S_IRUGO, show_type, NULL), 254b00055aaSStefan Rompf __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), 255fd586bacSKay Sievers __ATTR(address, S_IRUGO, show_address, NULL), 256fd586bacSKay Sievers __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), 257fd586bacSKay Sievers __ATTR(carrier, S_IRUGO, show_carrier, NULL), 258b00055aaSStefan Rompf __ATTR(dormant, S_IRUGO, show_dormant, NULL), 259b00055aaSStefan Rompf __ATTR(operstate, S_IRUGO, show_operstate, NULL), 260fd586bacSKay Sievers __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), 261fd586bacSKay Sievers __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), 262fd586bacSKay Sievers __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, 263fd586bacSKay Sievers store_tx_queue_len), 264fd586bacSKay Sievers {} 2651da177e4SLinus Torvalds }; 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds /* Show a given an attribute in the statistics group */ 26843cb76d9SGreg Kroah-Hartman static ssize_t netstat_show(const struct device *d, 26943cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf, 2701da177e4SLinus Torvalds unsigned long offset) 2711da177e4SLinus Torvalds { 27243cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 2731da177e4SLinus Torvalds ssize_t ret = -EINVAL; 2741da177e4SLinus Torvalds 275df1b86c5SPavel Emelyanov WARN_ON(offset > sizeof(struct net_device_stats) || 276df1b86c5SPavel Emelyanov offset % sizeof(unsigned long) != 0); 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds read_lock(&dev_base_lock); 27996e74088SPavel Emelyanov if (dev_isalive(dev)) { 280eeda3fd6SStephen Hemminger const struct net_device_stats *stats = dev_get_stats(dev); 2811da177e4SLinus Torvalds ret = sprintf(buf, fmt_ulong, 2821da177e4SLinus Torvalds *(unsigned long *)(((u8 *) stats) + offset)); 28396e74088SPavel Emelyanov } 2841da177e4SLinus Torvalds read_unlock(&dev_base_lock); 2851da177e4SLinus Torvalds return ret; 2861da177e4SLinus Torvalds } 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvalds /* generate a read-only statistics attribute */ 2891da177e4SLinus Torvalds #define NETSTAT_ENTRY(name) \ 29043cb76d9SGreg Kroah-Hartman static ssize_t show_##name(struct device *d, \ 29143cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) \ 2921da177e4SLinus Torvalds { \ 29343cb76d9SGreg Kroah-Hartman return netstat_show(d, attr, buf, \ 2941da177e4SLinus Torvalds offsetof(struct net_device_stats, name)); \ 2951da177e4SLinus Torvalds } \ 29643cb76d9SGreg Kroah-Hartman static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds NETSTAT_ENTRY(rx_packets); 2991da177e4SLinus Torvalds NETSTAT_ENTRY(tx_packets); 3001da177e4SLinus Torvalds NETSTAT_ENTRY(rx_bytes); 3011da177e4SLinus Torvalds NETSTAT_ENTRY(tx_bytes); 3021da177e4SLinus Torvalds NETSTAT_ENTRY(rx_errors); 3031da177e4SLinus Torvalds NETSTAT_ENTRY(tx_errors); 3041da177e4SLinus Torvalds NETSTAT_ENTRY(rx_dropped); 3051da177e4SLinus Torvalds NETSTAT_ENTRY(tx_dropped); 3061da177e4SLinus Torvalds NETSTAT_ENTRY(multicast); 3071da177e4SLinus Torvalds NETSTAT_ENTRY(collisions); 3081da177e4SLinus Torvalds NETSTAT_ENTRY(rx_length_errors); 3091da177e4SLinus Torvalds NETSTAT_ENTRY(rx_over_errors); 3101da177e4SLinus Torvalds NETSTAT_ENTRY(rx_crc_errors); 3111da177e4SLinus Torvalds NETSTAT_ENTRY(rx_frame_errors); 3121da177e4SLinus Torvalds NETSTAT_ENTRY(rx_fifo_errors); 3131da177e4SLinus Torvalds NETSTAT_ENTRY(rx_missed_errors); 3141da177e4SLinus Torvalds NETSTAT_ENTRY(tx_aborted_errors); 3151da177e4SLinus Torvalds NETSTAT_ENTRY(tx_carrier_errors); 3161da177e4SLinus Torvalds NETSTAT_ENTRY(tx_fifo_errors); 3171da177e4SLinus Torvalds NETSTAT_ENTRY(tx_heartbeat_errors); 3181da177e4SLinus Torvalds NETSTAT_ENTRY(tx_window_errors); 3191da177e4SLinus Torvalds NETSTAT_ENTRY(rx_compressed); 3201da177e4SLinus Torvalds NETSTAT_ENTRY(tx_compressed); 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds static struct attribute *netstat_attrs[] = { 32343cb76d9SGreg Kroah-Hartman &dev_attr_rx_packets.attr, 32443cb76d9SGreg Kroah-Hartman &dev_attr_tx_packets.attr, 32543cb76d9SGreg Kroah-Hartman &dev_attr_rx_bytes.attr, 32643cb76d9SGreg Kroah-Hartman &dev_attr_tx_bytes.attr, 32743cb76d9SGreg Kroah-Hartman &dev_attr_rx_errors.attr, 32843cb76d9SGreg Kroah-Hartman &dev_attr_tx_errors.attr, 32943cb76d9SGreg Kroah-Hartman &dev_attr_rx_dropped.attr, 33043cb76d9SGreg Kroah-Hartman &dev_attr_tx_dropped.attr, 33143cb76d9SGreg Kroah-Hartman &dev_attr_multicast.attr, 33243cb76d9SGreg Kroah-Hartman &dev_attr_collisions.attr, 33343cb76d9SGreg Kroah-Hartman &dev_attr_rx_length_errors.attr, 33443cb76d9SGreg Kroah-Hartman &dev_attr_rx_over_errors.attr, 33543cb76d9SGreg Kroah-Hartman &dev_attr_rx_crc_errors.attr, 33643cb76d9SGreg Kroah-Hartman &dev_attr_rx_frame_errors.attr, 33743cb76d9SGreg Kroah-Hartman &dev_attr_rx_fifo_errors.attr, 33843cb76d9SGreg Kroah-Hartman &dev_attr_rx_missed_errors.attr, 33943cb76d9SGreg Kroah-Hartman &dev_attr_tx_aborted_errors.attr, 34043cb76d9SGreg Kroah-Hartman &dev_attr_tx_carrier_errors.attr, 34143cb76d9SGreg Kroah-Hartman &dev_attr_tx_fifo_errors.attr, 34243cb76d9SGreg Kroah-Hartman &dev_attr_tx_heartbeat_errors.attr, 34343cb76d9SGreg Kroah-Hartman &dev_attr_tx_window_errors.attr, 34443cb76d9SGreg Kroah-Hartman &dev_attr_rx_compressed.attr, 34543cb76d9SGreg Kroah-Hartman &dev_attr_tx_compressed.attr, 3461da177e4SLinus Torvalds NULL 3471da177e4SLinus Torvalds }; 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds static struct attribute_group netstat_group = { 3511da177e4SLinus Torvalds .name = "statistics", 3521da177e4SLinus Torvalds .attrs = netstat_attrs, 3531da177e4SLinus Torvalds }; 3541da177e4SLinus Torvalds 35522bb1be4SJohannes Berg #ifdef CONFIG_WIRELESS_EXT_SYSFS 3561da177e4SLinus Torvalds /* helper function that does all the locking etc for wireless stats */ 35743cb76d9SGreg Kroah-Hartman static ssize_t wireless_show(struct device *d, char *buf, 3581da177e4SLinus Torvalds ssize_t (*format)(const struct iw_statistics *, 3591da177e4SLinus Torvalds char *)) 3601da177e4SLinus Torvalds { 36143cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 3626dd214b5SAndrey Borzenkov const struct iw_statistics *iw = NULL; 3631da177e4SLinus Torvalds ssize_t ret = -EINVAL; 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds read_lock(&dev_base_lock); 3666dd214b5SAndrey Borzenkov if (dev_isalive(dev)) { 3676dd214b5SAndrey Borzenkov if (dev->wireless_handlers && 3686dd214b5SAndrey Borzenkov dev->wireless_handlers->get_wireless_stats) 3696dd214b5SAndrey Borzenkov iw = dev->wireless_handlers->get_wireless_stats(dev); 3706dd214b5SAndrey Borzenkov if (iw != NULL) 3711da177e4SLinus Torvalds ret = (*format)(iw, buf); 3726dd214b5SAndrey Borzenkov } 3731da177e4SLinus Torvalds read_unlock(&dev_base_lock); 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds return ret; 3761da177e4SLinus Torvalds } 3771da177e4SLinus Torvalds 3781da177e4SLinus Torvalds /* show function template for wireless fields */ 3791da177e4SLinus Torvalds #define WIRELESS_SHOW(name, field, format_string) \ 3801da177e4SLinus Torvalds static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ 3811da177e4SLinus Torvalds { \ 3821da177e4SLinus Torvalds return sprintf(buf, format_string, iw->field); \ 3831da177e4SLinus Torvalds } \ 38443cb76d9SGreg Kroah-Hartman static ssize_t show_iw_##name(struct device *d, \ 38543cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) \ 3861da177e4SLinus Torvalds { \ 38743cb76d9SGreg Kroah-Hartman return wireless_show(d, buf, format_iw_##name); \ 3881da177e4SLinus Torvalds } \ 38943cb76d9SGreg Kroah-Hartman static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds WIRELESS_SHOW(status, status, fmt_hex); 3921da177e4SLinus Torvalds WIRELESS_SHOW(link, qual.qual, fmt_dec); 3931da177e4SLinus Torvalds WIRELESS_SHOW(level, qual.level, fmt_dec); 3941da177e4SLinus Torvalds WIRELESS_SHOW(noise, qual.noise, fmt_dec); 3951da177e4SLinus Torvalds WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); 3961da177e4SLinus Torvalds WIRELESS_SHOW(crypt, discard.code, fmt_dec); 3971da177e4SLinus Torvalds WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); 3981da177e4SLinus Torvalds WIRELESS_SHOW(misc, discard.misc, fmt_dec); 3991da177e4SLinus Torvalds WIRELESS_SHOW(retries, discard.retries, fmt_dec); 4001da177e4SLinus Torvalds WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); 4011da177e4SLinus Torvalds 4021da177e4SLinus Torvalds static struct attribute *wireless_attrs[] = { 40343cb76d9SGreg Kroah-Hartman &dev_attr_status.attr, 40443cb76d9SGreg Kroah-Hartman &dev_attr_link.attr, 40543cb76d9SGreg Kroah-Hartman &dev_attr_level.attr, 40643cb76d9SGreg Kroah-Hartman &dev_attr_noise.attr, 40743cb76d9SGreg Kroah-Hartman &dev_attr_nwid.attr, 40843cb76d9SGreg Kroah-Hartman &dev_attr_crypt.attr, 40943cb76d9SGreg Kroah-Hartman &dev_attr_fragment.attr, 41043cb76d9SGreg Kroah-Hartman &dev_attr_retries.attr, 41143cb76d9SGreg Kroah-Hartman &dev_attr_misc.attr, 41243cb76d9SGreg Kroah-Hartman &dev_attr_beacon.attr, 4131da177e4SLinus Torvalds NULL 4141da177e4SLinus Torvalds }; 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds static struct attribute_group wireless_group = { 4171da177e4SLinus Torvalds .name = "wireless", 4181da177e4SLinus Torvalds .attrs = wireless_attrs, 4191da177e4SLinus Torvalds }; 4201da177e4SLinus Torvalds #endif 4211da177e4SLinus Torvalds 4228b41d188SEric W. Biederman #endif /* CONFIG_SYSFS */ 4238b41d188SEric W. Biederman 4241da177e4SLinus Torvalds #ifdef CONFIG_HOTPLUG 4257eff2e7aSKay Sievers static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) 4261da177e4SLinus Torvalds { 42743cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 4287eff2e7aSKay Sievers int retval; 4291da177e4SLinus Torvalds 43009bb5217SDaniel Lezcano if (!net_eq(dev_net(dev), &init_net)) 43109bb5217SDaniel Lezcano return 0; 43209bb5217SDaniel Lezcano 433312c004dSKay Sievers /* pass interface to uevent. */ 4347eff2e7aSKay Sievers retval = add_uevent_var(env, "INTERFACE=%s", dev->name); 435bf62456eSEric Rannaud if (retval) 436bf62456eSEric Rannaud goto exit; 4371da177e4SLinus Torvalds 438ca2f37dbSJean Tourrilhes /* pass ifindex to uevent. 439ca2f37dbSJean Tourrilhes * ifindex is useful as it won't change (interface name may change) 440ca2f37dbSJean Tourrilhes * and is what RtNetlink uses natively. */ 4417eff2e7aSKay Sievers retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); 442ca2f37dbSJean Tourrilhes 443bf62456eSEric Rannaud exit: 444bf62456eSEric Rannaud return retval; 4451da177e4SLinus Torvalds } 4461da177e4SLinus Torvalds #endif 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds /* 4491da177e4SLinus Torvalds * netdev_release -- destroy and free a dead device. 45043cb76d9SGreg Kroah-Hartman * Called when last reference to device kobject is gone. 4511da177e4SLinus Torvalds */ 45243cb76d9SGreg Kroah-Hartman static void netdev_release(struct device *d) 4531da177e4SLinus Torvalds { 45443cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds BUG_ON(dev->reg_state != NETREG_RELEASED); 4571da177e4SLinus Torvalds 4580b815a1aSStephen Hemminger kfree(dev->ifalias); 4591da177e4SLinus Torvalds kfree((char *)dev - dev->padded); 4601da177e4SLinus Torvalds } 4611da177e4SLinus Torvalds 4621da177e4SLinus Torvalds static struct class net_class = { 4631da177e4SLinus Torvalds .name = "net", 46443cb76d9SGreg Kroah-Hartman .dev_release = netdev_release, 4658b41d188SEric W. Biederman #ifdef CONFIG_SYSFS 46643cb76d9SGreg Kroah-Hartman .dev_attrs = net_class_attributes, 4678b41d188SEric W. Biederman #endif /* CONFIG_SYSFS */ 4681da177e4SLinus Torvalds #ifdef CONFIG_HOTPLUG 46943cb76d9SGreg Kroah-Hartman .dev_uevent = netdev_uevent, 4701da177e4SLinus Torvalds #endif 4711da177e4SLinus Torvalds }; 4721da177e4SLinus Torvalds 4739093bbb2SStephen Hemminger /* Delete sysfs entries but hold kobject reference until after all 4749093bbb2SStephen Hemminger * netdev references are gone. 4759093bbb2SStephen Hemminger */ 4768b41d188SEric W. Biederman void netdev_unregister_kobject(struct net_device * net) 4771da177e4SLinus Torvalds { 4789093bbb2SStephen Hemminger struct device *dev = &(net->dev); 4799093bbb2SStephen Hemminger 4809093bbb2SStephen Hemminger kobject_get(&dev->kobj); 4813891845eSEric W. Biederman 4823891845eSEric W. Biederman if (dev_net(net) != &init_net) 4833891845eSEric W. Biederman return; 4843891845eSEric W. Biederman 4859093bbb2SStephen Hemminger device_del(dev); 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds /* Create sysfs entries for network device. */ 4898b41d188SEric W. Biederman int netdev_register_kobject(struct net_device *net) 4901da177e4SLinus Torvalds { 49143cb76d9SGreg Kroah-Hartman struct device *dev = &(net->dev); 492fe9925b5SStephen Hemminger struct attribute_group **groups = net->sysfs_groups; 4931da177e4SLinus Torvalds 49443cb76d9SGreg Kroah-Hartman dev->class = &net_class; 49543cb76d9SGreg Kroah-Hartman dev->platform_data = net; 49643cb76d9SGreg Kroah-Hartman dev->groups = groups; 4971da177e4SLinus Torvalds 498fe9925b5SStephen Hemminger BUILD_BUG_ON(BUS_ID_SIZE < IFNAMSIZ); 499fb28ad35SKay Sievers dev_set_name(dev, net->name); 5001da177e4SLinus Torvalds 5018b41d188SEric W. Biederman #ifdef CONFIG_SYSFS 502fe9925b5SStephen Hemminger *groups++ = &netstat_group; 5031da177e4SLinus Torvalds 50422bb1be4SJohannes Berg #ifdef CONFIG_WIRELESS_EXT_SYSFS 505baef1865SJohn W. Linville if (net->wireless_handlers && net->wireless_handlers->get_wireless_stats) 506fe9925b5SStephen Hemminger *groups++ = &wireless_group; 5071da177e4SLinus Torvalds #endif 5088b41d188SEric W. Biederman #endif /* CONFIG_SYSFS */ 5091da177e4SLinus Torvalds 5103891845eSEric W. Biederman if (dev_net(net) != &init_net) 5113891845eSEric W. Biederman return 0; 5123891845eSEric W. Biederman 51343cb76d9SGreg Kroah-Hartman return device_add(dev); 5141da177e4SLinus Torvalds } 5151da177e4SLinus Torvalds 516b8a9787eSJay Vosburgh int netdev_class_create_file(struct class_attribute *class_attr) 517b8a9787eSJay Vosburgh { 518b8a9787eSJay Vosburgh return class_create_file(&net_class, class_attr); 519b8a9787eSJay Vosburgh } 520b8a9787eSJay Vosburgh 521b8a9787eSJay Vosburgh void netdev_class_remove_file(struct class_attribute *class_attr) 522b8a9787eSJay Vosburgh { 523b8a9787eSJay Vosburgh class_remove_file(&net_class, class_attr); 524b8a9787eSJay Vosburgh } 525b8a9787eSJay Vosburgh 526b8a9787eSJay Vosburgh EXPORT_SYMBOL(netdev_class_create_file); 527b8a9787eSJay Vosburgh EXPORT_SYMBOL(netdev_class_remove_file); 528b8a9787eSJay Vosburgh 529aaf8cdc3SDaniel Lezcano void netdev_initialize_kobject(struct net_device *net) 530aaf8cdc3SDaniel Lezcano { 531aaf8cdc3SDaniel Lezcano struct device *device = &(net->dev); 532aaf8cdc3SDaniel Lezcano device_initialize(device); 533aaf8cdc3SDaniel Lezcano } 534aaf8cdc3SDaniel Lezcano 5358b41d188SEric W. Biederman int netdev_kobject_init(void) 5361da177e4SLinus Torvalds { 5371da177e4SLinus Torvalds return class_register(&net_class); 5381da177e4SLinus Torvalds } 539