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> 165a0e3ad6STejun Heo #include <linux/slab.h> 17608b4b95SEric W. Biederman #include <linux/nsproxy.h> 181da177e4SLinus Torvalds #include <net/sock.h> 19608b4b95SEric W. Biederman #include <net/net_namespace.h> 201da177e4SLinus Torvalds #include <linux/rtnetlink.h> 21fec5e652STom Herbert #include <linux/vmalloc.h> 22bc3b2d7fSPaul Gortmaker #include <linux/export.h> 23114cf580STom Herbert #include <linux/jiffies.h> 249802c8e2SMing Lei #include <linux/pm_runtime.h> 251da177e4SLinus Torvalds 26342709efSPavel Emelyanov #include "net-sysfs.h" 27342709efSPavel Emelyanov 288b41d188SEric W. Biederman #ifdef CONFIG_SYSFS 291da177e4SLinus Torvalds static const char fmt_hex[] = "%#x\n"; 30d1102b59SDavid S. Miller static const char fmt_long_hex[] = "%#lx\n"; 311da177e4SLinus Torvalds static const char fmt_dec[] = "%d\n"; 328ae6dacaSDavid Decotigny static const char fmt_udec[] = "%u\n"; 331da177e4SLinus Torvalds static const char fmt_ulong[] = "%lu\n"; 34be1f3c2cSBen Hutchings static const char fmt_u64[] = "%llu\n"; 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds static inline int dev_isalive(const struct net_device *dev) 371da177e4SLinus Torvalds { 38fe9925b5SStephen Hemminger return dev->reg_state <= NETREG_REGISTERED; 391da177e4SLinus Torvalds } 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds /* use same locking rules as GIF* ioctl's */ 4243cb76d9SGreg Kroah-Hartman static ssize_t netdev_show(const struct device *dev, 4343cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf, 441da177e4SLinus Torvalds ssize_t (*format)(const struct net_device *, char *)) 451da177e4SLinus Torvalds { 4643cb76d9SGreg Kroah-Hartman struct net_device *net = to_net_dev(dev); 471da177e4SLinus Torvalds ssize_t ret = -EINVAL; 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds read_lock(&dev_base_lock); 501da177e4SLinus Torvalds if (dev_isalive(net)) 511da177e4SLinus Torvalds ret = (*format)(net, buf); 521da177e4SLinus Torvalds read_unlock(&dev_base_lock); 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds return ret; 551da177e4SLinus Torvalds } 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds /* generate a show function for simple field */ 581da177e4SLinus Torvalds #define NETDEVICE_SHOW(field, format_string) \ 591da177e4SLinus Torvalds static ssize_t format_##field(const struct net_device *net, char *buf) \ 601da177e4SLinus Torvalds { \ 611da177e4SLinus Torvalds return sprintf(buf, format_string, net->field); \ 621da177e4SLinus Torvalds } \ 6343cb76d9SGreg Kroah-Hartman static ssize_t show_##field(struct device *dev, \ 6443cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) \ 651da177e4SLinus Torvalds { \ 6643cb76d9SGreg Kroah-Hartman return netdev_show(dev, attr, buf, format_##field); \ 671da177e4SLinus Torvalds } 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds /* use same locking and permission rules as SIF* ioctl's */ 7143cb76d9SGreg Kroah-Hartman static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, 721da177e4SLinus Torvalds const char *buf, size_t len, 731da177e4SLinus Torvalds int (*set)(struct net_device *, unsigned long)) 741da177e4SLinus Torvalds { 755e1fccc0SEric W. Biederman struct net_device *netdev = to_net_dev(dev); 765e1fccc0SEric W. Biederman struct net *net = dev_net(netdev); 771da177e4SLinus Torvalds unsigned long new; 781da177e4SLinus Torvalds int ret = -EINVAL; 791da177e4SLinus Torvalds 805e1fccc0SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 811da177e4SLinus Torvalds return -EPERM; 821da177e4SLinus Torvalds 83e1e420c7SShuah Khan ret = kstrtoul(buf, 0, &new); 84e1e420c7SShuah Khan if (ret) 851da177e4SLinus Torvalds goto err; 861da177e4SLinus Torvalds 875a5990d3SStephen Hemminger if (!rtnl_trylock()) 88336ca57cSEric W. Biederman return restart_syscall(); 895a5990d3SStephen Hemminger 905e1fccc0SEric W. Biederman if (dev_isalive(netdev)) { 915e1fccc0SEric W. Biederman if ((ret = (*set)(netdev, new)) == 0) 921da177e4SLinus Torvalds ret = len; 931da177e4SLinus Torvalds } 941da177e4SLinus Torvalds rtnl_unlock(); 951da177e4SLinus Torvalds err: 961da177e4SLinus Torvalds return ret; 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds 999d29672cSDavid Woodhouse NETDEVICE_SHOW(dev_id, fmt_hex); 100c1f79426SStefan Assmann NETDEVICE_SHOW(addr_assign_type, fmt_dec); 101fd586bacSKay Sievers NETDEVICE_SHOW(addr_len, fmt_dec); 102fd586bacSKay Sievers NETDEVICE_SHOW(iflink, fmt_dec); 103fd586bacSKay Sievers NETDEVICE_SHOW(ifindex, fmt_dec); 104fd586bacSKay Sievers NETDEVICE_SHOW(type, fmt_dec); 105b00055aaSStefan Rompf NETDEVICE_SHOW(link_mode, fmt_dec); 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds /* use same locking rules as GIFHWADDR ioctl's */ 10843cb76d9SGreg Kroah-Hartman static ssize_t show_address(struct device *dev, struct device_attribute *attr, 10943cb76d9SGreg Kroah-Hartman char *buf) 1101da177e4SLinus Torvalds { 1111da177e4SLinus Torvalds struct net_device *net = to_net_dev(dev); 1121da177e4SLinus Torvalds ssize_t ret = -EINVAL; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds read_lock(&dev_base_lock); 1151da177e4SLinus Torvalds if (dev_isalive(net)) 1167ffc49a6SMichael Chan ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); 1171da177e4SLinus Torvalds read_unlock(&dev_base_lock); 1181da177e4SLinus Torvalds return ret; 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 12143cb76d9SGreg Kroah-Hartman static ssize_t show_broadcast(struct device *dev, 12243cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 1231da177e4SLinus Torvalds { 1241da177e4SLinus Torvalds struct net_device *net = to_net_dev(dev); 1251da177e4SLinus Torvalds if (dev_isalive(net)) 1267ffc49a6SMichael Chan return sysfs_format_mac(buf, net->broadcast, net->addr_len); 1271da177e4SLinus Torvalds return -EINVAL; 1281da177e4SLinus Torvalds } 1291da177e4SLinus Torvalds 130fdae0fdeSJiri Pirko static int change_carrier(struct net_device *net, unsigned long new_carrier) 131fdae0fdeSJiri Pirko { 132fdae0fdeSJiri Pirko if (!netif_running(net)) 133fdae0fdeSJiri Pirko return -EINVAL; 134fdae0fdeSJiri Pirko return dev_change_carrier(net, (bool) new_carrier); 135fdae0fdeSJiri Pirko } 136fdae0fdeSJiri Pirko 137fdae0fdeSJiri Pirko static ssize_t store_carrier(struct device *dev, struct device_attribute *attr, 138fdae0fdeSJiri Pirko const char *buf, size_t len) 139fdae0fdeSJiri Pirko { 140fdae0fdeSJiri Pirko return netdev_store(dev, attr, buf, len, change_carrier); 141fdae0fdeSJiri Pirko } 142fdae0fdeSJiri Pirko 14343cb76d9SGreg Kroah-Hartman static ssize_t show_carrier(struct device *dev, 14443cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 1451da177e4SLinus Torvalds { 1461da177e4SLinus Torvalds struct net_device *netdev = to_net_dev(dev); 1471da177e4SLinus Torvalds if (netif_running(netdev)) { 1481da177e4SLinus Torvalds return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); 1491da177e4SLinus Torvalds } 1501da177e4SLinus Torvalds return -EINVAL; 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds 153d519e17eSAndy Gospodarek static ssize_t show_speed(struct device *dev, 154d519e17eSAndy Gospodarek struct device_attribute *attr, char *buf) 155d519e17eSAndy Gospodarek { 156d519e17eSAndy Gospodarek struct net_device *netdev = to_net_dev(dev); 157d519e17eSAndy Gospodarek int ret = -EINVAL; 158d519e17eSAndy Gospodarek 159d519e17eSAndy Gospodarek if (!rtnl_trylock()) 160d519e17eSAndy Gospodarek return restart_syscall(); 161d519e17eSAndy Gospodarek 1628ae6dacaSDavid Decotigny if (netif_running(netdev)) { 1638ae6dacaSDavid Decotigny struct ethtool_cmd cmd; 1644bc71cb9SJiri Pirko if (!__ethtool_get_settings(netdev, &cmd)) 1658ae6dacaSDavid Decotigny ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd)); 166d519e17eSAndy Gospodarek } 167d519e17eSAndy Gospodarek rtnl_unlock(); 168d519e17eSAndy Gospodarek return ret; 169d519e17eSAndy Gospodarek } 170d519e17eSAndy Gospodarek 171d519e17eSAndy Gospodarek static ssize_t show_duplex(struct device *dev, 172d519e17eSAndy Gospodarek struct device_attribute *attr, char *buf) 173d519e17eSAndy Gospodarek { 174d519e17eSAndy Gospodarek struct net_device *netdev = to_net_dev(dev); 175d519e17eSAndy Gospodarek int ret = -EINVAL; 176d519e17eSAndy Gospodarek 177d519e17eSAndy Gospodarek if (!rtnl_trylock()) 178d519e17eSAndy Gospodarek return restart_syscall(); 179d519e17eSAndy Gospodarek 1808ae6dacaSDavid Decotigny if (netif_running(netdev)) { 1818ae6dacaSDavid Decotigny struct ethtool_cmd cmd; 182c6c13965SNikolay Aleksandrov if (!__ethtool_get_settings(netdev, &cmd)) { 183c6c13965SNikolay Aleksandrov const char *duplex; 184c6c13965SNikolay Aleksandrov switch (cmd.duplex) { 185c6c13965SNikolay Aleksandrov case DUPLEX_HALF: 186c6c13965SNikolay Aleksandrov duplex = "half"; 187c6c13965SNikolay Aleksandrov break; 188c6c13965SNikolay Aleksandrov case DUPLEX_FULL: 189c6c13965SNikolay Aleksandrov duplex = "full"; 190c6c13965SNikolay Aleksandrov break; 191c6c13965SNikolay Aleksandrov default: 192c6c13965SNikolay Aleksandrov duplex = "unknown"; 193c6c13965SNikolay Aleksandrov break; 194c6c13965SNikolay Aleksandrov } 195c6c13965SNikolay Aleksandrov ret = sprintf(buf, "%s\n", duplex); 196c6c13965SNikolay Aleksandrov } 197d519e17eSAndy Gospodarek } 198d519e17eSAndy Gospodarek rtnl_unlock(); 199d519e17eSAndy Gospodarek return ret; 200d519e17eSAndy Gospodarek } 201d519e17eSAndy Gospodarek 20243cb76d9SGreg Kroah-Hartman static ssize_t show_dormant(struct device *dev, 20343cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 204b00055aaSStefan Rompf { 205b00055aaSStefan Rompf struct net_device *netdev = to_net_dev(dev); 206b00055aaSStefan Rompf 207b00055aaSStefan Rompf if (netif_running(netdev)) 208b00055aaSStefan Rompf return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); 209b00055aaSStefan Rompf 210b00055aaSStefan Rompf return -EINVAL; 211b00055aaSStefan Rompf } 212b00055aaSStefan Rompf 21336cbd3dcSJan Engelhardt static const char *const operstates[] = { 214b00055aaSStefan Rompf "unknown", 215b00055aaSStefan Rompf "notpresent", /* currently unused */ 216b00055aaSStefan Rompf "down", 217b00055aaSStefan Rompf "lowerlayerdown", 218b00055aaSStefan Rompf "testing", /* currently unused */ 219b00055aaSStefan Rompf "dormant", 220b00055aaSStefan Rompf "up" 221b00055aaSStefan Rompf }; 222b00055aaSStefan Rompf 22343cb76d9SGreg Kroah-Hartman static ssize_t show_operstate(struct device *dev, 22443cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 225b00055aaSStefan Rompf { 226b00055aaSStefan Rompf const struct net_device *netdev = to_net_dev(dev); 227b00055aaSStefan Rompf unsigned char operstate; 228b00055aaSStefan Rompf 229b00055aaSStefan Rompf read_lock(&dev_base_lock); 230b00055aaSStefan Rompf operstate = netdev->operstate; 231b00055aaSStefan Rompf if (!netif_running(netdev)) 232b00055aaSStefan Rompf operstate = IF_OPER_DOWN; 233b00055aaSStefan Rompf read_unlock(&dev_base_lock); 234b00055aaSStefan Rompf 235e3a5cd9eSAdrian Bunk if (operstate >= ARRAY_SIZE(operstates)) 236b00055aaSStefan Rompf return -EINVAL; /* should not happen */ 237b00055aaSStefan Rompf 238b00055aaSStefan Rompf return sprintf(buf, "%s\n", operstates[operstate]); 239b00055aaSStefan Rompf } 240b00055aaSStefan Rompf 2411da177e4SLinus Torvalds /* read-write attributes */ 2421da177e4SLinus Torvalds NETDEVICE_SHOW(mtu, fmt_dec); 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds static int change_mtu(struct net_device *net, unsigned long new_mtu) 2451da177e4SLinus Torvalds { 2461da177e4SLinus Torvalds return dev_set_mtu(net, (int) new_mtu); 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds 24943cb76d9SGreg Kroah-Hartman static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, 25043cb76d9SGreg Kroah-Hartman const char *buf, size_t len) 2511da177e4SLinus Torvalds { 25243cb76d9SGreg Kroah-Hartman return netdev_store(dev, attr, buf, len, change_mtu); 2531da177e4SLinus Torvalds } 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds NETDEVICE_SHOW(flags, fmt_hex); 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds static int change_flags(struct net_device *net, unsigned long new_flags) 2581da177e4SLinus Torvalds { 25995c96174SEric Dumazet return dev_change_flags(net, (unsigned int) new_flags); 2601da177e4SLinus Torvalds } 2611da177e4SLinus Torvalds 26243cb76d9SGreg Kroah-Hartman static ssize_t store_flags(struct device *dev, struct device_attribute *attr, 26343cb76d9SGreg Kroah-Hartman const char *buf, size_t len) 2641da177e4SLinus Torvalds { 26543cb76d9SGreg Kroah-Hartman return netdev_store(dev, attr, buf, len, change_flags); 2661da177e4SLinus Torvalds } 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds NETDEVICE_SHOW(tx_queue_len, fmt_ulong); 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds static int change_tx_queue_len(struct net_device *net, unsigned long new_len) 2711da177e4SLinus Torvalds { 2721da177e4SLinus Torvalds net->tx_queue_len = new_len; 2731da177e4SLinus Torvalds return 0; 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 27643cb76d9SGreg Kroah-Hartman static ssize_t store_tx_queue_len(struct device *dev, 27743cb76d9SGreg Kroah-Hartman struct device_attribute *attr, 27843cb76d9SGreg Kroah-Hartman const char *buf, size_t len) 2791da177e4SLinus Torvalds { 2805e1fccc0SEric W. Biederman if (!capable(CAP_NET_ADMIN)) 2815e1fccc0SEric W. Biederman return -EPERM; 2825e1fccc0SEric W. Biederman 28343cb76d9SGreg Kroah-Hartman return netdev_store(dev, attr, buf, len, change_tx_queue_len); 2841da177e4SLinus Torvalds } 2851da177e4SLinus Torvalds 2860b815a1aSStephen Hemminger static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr, 2870b815a1aSStephen Hemminger const char *buf, size_t len) 2880b815a1aSStephen Hemminger { 2890b815a1aSStephen Hemminger struct net_device *netdev = to_net_dev(dev); 2905e1fccc0SEric W. Biederman struct net *net = dev_net(netdev); 2910b815a1aSStephen Hemminger size_t count = len; 2920b815a1aSStephen Hemminger ssize_t ret; 2930b815a1aSStephen Hemminger 2945e1fccc0SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 2950b815a1aSStephen Hemminger return -EPERM; 2960b815a1aSStephen Hemminger 2970b815a1aSStephen Hemminger /* ignore trailing newline */ 2980b815a1aSStephen Hemminger if (len > 0 && buf[len - 1] == '\n') 2990b815a1aSStephen Hemminger --count; 3000b815a1aSStephen Hemminger 301336ca57cSEric W. Biederman if (!rtnl_trylock()) 302336ca57cSEric W. Biederman return restart_syscall(); 3030b815a1aSStephen Hemminger ret = dev_set_alias(netdev, buf, count); 3040b815a1aSStephen Hemminger rtnl_unlock(); 3050b815a1aSStephen Hemminger 3060b815a1aSStephen Hemminger return ret < 0 ? ret : len; 3070b815a1aSStephen Hemminger } 3080b815a1aSStephen Hemminger 3090b815a1aSStephen Hemminger static ssize_t show_ifalias(struct device *dev, 3100b815a1aSStephen Hemminger struct device_attribute *attr, char *buf) 3110b815a1aSStephen Hemminger { 3120b815a1aSStephen Hemminger const struct net_device *netdev = to_net_dev(dev); 3130b815a1aSStephen Hemminger ssize_t ret = 0; 3140b815a1aSStephen Hemminger 315336ca57cSEric W. Biederman if (!rtnl_trylock()) 316336ca57cSEric W. Biederman return restart_syscall(); 3170b815a1aSStephen Hemminger if (netdev->ifalias) 3180b815a1aSStephen Hemminger ret = sprintf(buf, "%s\n", netdev->ifalias); 3190b815a1aSStephen Hemminger rtnl_unlock(); 3200b815a1aSStephen Hemminger return ret; 3210b815a1aSStephen Hemminger } 3220b815a1aSStephen Hemminger 323a512b92bSVlad Dogaru NETDEVICE_SHOW(group, fmt_dec); 324a512b92bSVlad Dogaru 325a512b92bSVlad Dogaru static int change_group(struct net_device *net, unsigned long new_group) 326a512b92bSVlad Dogaru { 327a512b92bSVlad Dogaru dev_set_group(net, (int) new_group); 328a512b92bSVlad Dogaru return 0; 329a512b92bSVlad Dogaru } 330a512b92bSVlad Dogaru 331a512b92bSVlad Dogaru static ssize_t store_group(struct device *dev, struct device_attribute *attr, 332a512b92bSVlad Dogaru const char *buf, size_t len) 333a512b92bSVlad Dogaru { 334a512b92bSVlad Dogaru return netdev_store(dev, attr, buf, len, change_group); 335a512b92bSVlad Dogaru } 336a512b92bSVlad Dogaru 337ff80e519SJiri Pirko static ssize_t show_phys_port_id(struct device *dev, 338ff80e519SJiri Pirko struct device_attribute *attr, char *buf) 339ff80e519SJiri Pirko { 340ff80e519SJiri Pirko struct net_device *netdev = to_net_dev(dev); 341ff80e519SJiri Pirko ssize_t ret = -EINVAL; 342ff80e519SJiri Pirko 343ff80e519SJiri Pirko if (!rtnl_trylock()) 344ff80e519SJiri Pirko return restart_syscall(); 345ff80e519SJiri Pirko 346ff80e519SJiri Pirko if (dev_isalive(netdev)) { 347ff80e519SJiri Pirko struct netdev_phys_port_id ppid; 348ff80e519SJiri Pirko 349ff80e519SJiri Pirko ret = dev_get_phys_port_id(netdev, &ppid); 350ff80e519SJiri Pirko if (!ret) 351ff80e519SJiri Pirko ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); 352ff80e519SJiri Pirko } 353ff80e519SJiri Pirko rtnl_unlock(); 354ff80e519SJiri Pirko 355ff80e519SJiri Pirko return ret; 356ff80e519SJiri Pirko } 357ff80e519SJiri Pirko 35843cb76d9SGreg Kroah-Hartman static struct device_attribute net_class_attributes[] = { 359c1f79426SStefan Assmann __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL), 360fd586bacSKay Sievers __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), 3619d29672cSDavid Woodhouse __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), 3620b815a1aSStephen Hemminger __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), 363fd586bacSKay Sievers __ATTR(iflink, S_IRUGO, show_iflink, NULL), 364fd586bacSKay Sievers __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), 365fd586bacSKay Sievers __ATTR(type, S_IRUGO, show_type, NULL), 366b00055aaSStefan Rompf __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), 367fd586bacSKay Sievers __ATTR(address, S_IRUGO, show_address, NULL), 368fd586bacSKay Sievers __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), 369fdae0fdeSJiri Pirko __ATTR(carrier, S_IRUGO | S_IWUSR, show_carrier, store_carrier), 370d519e17eSAndy Gospodarek __ATTR(speed, S_IRUGO, show_speed, NULL), 371d519e17eSAndy Gospodarek __ATTR(duplex, S_IRUGO, show_duplex, NULL), 372b00055aaSStefan Rompf __ATTR(dormant, S_IRUGO, show_dormant, NULL), 373b00055aaSStefan Rompf __ATTR(operstate, S_IRUGO, show_operstate, NULL), 374fd586bacSKay Sievers __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), 375fd586bacSKay Sievers __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), 376fd586bacSKay Sievers __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, 377fd586bacSKay Sievers store_tx_queue_len), 378b6644cb7SXiaotian Feng __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group), 379ff80e519SJiri Pirko __ATTR(phys_port_id, S_IRUGO, show_phys_port_id, NULL), 380fd586bacSKay Sievers {} 3811da177e4SLinus Torvalds }; 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds /* Show a given an attribute in the statistics group */ 38443cb76d9SGreg Kroah-Hartman static ssize_t netstat_show(const struct device *d, 38543cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf, 3861da177e4SLinus Torvalds unsigned long offset) 3871da177e4SLinus Torvalds { 38843cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 3891da177e4SLinus Torvalds ssize_t ret = -EINVAL; 3901da177e4SLinus Torvalds 391be1f3c2cSBen Hutchings WARN_ON(offset > sizeof(struct rtnl_link_stats64) || 392be1f3c2cSBen Hutchings offset % sizeof(u64) != 0); 3931da177e4SLinus Torvalds 3941da177e4SLinus Torvalds read_lock(&dev_base_lock); 39596e74088SPavel Emelyanov if (dev_isalive(dev)) { 39628172739SEric Dumazet struct rtnl_link_stats64 temp; 39728172739SEric Dumazet const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); 39828172739SEric Dumazet 399be1f3c2cSBen Hutchings ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); 40096e74088SPavel Emelyanov } 4011da177e4SLinus Torvalds read_unlock(&dev_base_lock); 4021da177e4SLinus Torvalds return ret; 4031da177e4SLinus Torvalds } 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds /* generate a read-only statistics attribute */ 4061da177e4SLinus Torvalds #define NETSTAT_ENTRY(name) \ 40743cb76d9SGreg Kroah-Hartman static ssize_t show_##name(struct device *d, \ 40843cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) \ 4091da177e4SLinus Torvalds { \ 41043cb76d9SGreg Kroah-Hartman return netstat_show(d, attr, buf, \ 411be1f3c2cSBen Hutchings offsetof(struct rtnl_link_stats64, name)); \ 4121da177e4SLinus Torvalds } \ 41343cb76d9SGreg Kroah-Hartman static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds NETSTAT_ENTRY(rx_packets); 4161da177e4SLinus Torvalds NETSTAT_ENTRY(tx_packets); 4171da177e4SLinus Torvalds NETSTAT_ENTRY(rx_bytes); 4181da177e4SLinus Torvalds NETSTAT_ENTRY(tx_bytes); 4191da177e4SLinus Torvalds NETSTAT_ENTRY(rx_errors); 4201da177e4SLinus Torvalds NETSTAT_ENTRY(tx_errors); 4211da177e4SLinus Torvalds NETSTAT_ENTRY(rx_dropped); 4221da177e4SLinus Torvalds NETSTAT_ENTRY(tx_dropped); 4231da177e4SLinus Torvalds NETSTAT_ENTRY(multicast); 4241da177e4SLinus Torvalds NETSTAT_ENTRY(collisions); 4251da177e4SLinus Torvalds NETSTAT_ENTRY(rx_length_errors); 4261da177e4SLinus Torvalds NETSTAT_ENTRY(rx_over_errors); 4271da177e4SLinus Torvalds NETSTAT_ENTRY(rx_crc_errors); 4281da177e4SLinus Torvalds NETSTAT_ENTRY(rx_frame_errors); 4291da177e4SLinus Torvalds NETSTAT_ENTRY(rx_fifo_errors); 4301da177e4SLinus Torvalds NETSTAT_ENTRY(rx_missed_errors); 4311da177e4SLinus Torvalds NETSTAT_ENTRY(tx_aborted_errors); 4321da177e4SLinus Torvalds NETSTAT_ENTRY(tx_carrier_errors); 4331da177e4SLinus Torvalds NETSTAT_ENTRY(tx_fifo_errors); 4341da177e4SLinus Torvalds NETSTAT_ENTRY(tx_heartbeat_errors); 4351da177e4SLinus Torvalds NETSTAT_ENTRY(tx_window_errors); 4361da177e4SLinus Torvalds NETSTAT_ENTRY(rx_compressed); 4371da177e4SLinus Torvalds NETSTAT_ENTRY(tx_compressed); 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds static struct attribute *netstat_attrs[] = { 44043cb76d9SGreg Kroah-Hartman &dev_attr_rx_packets.attr, 44143cb76d9SGreg Kroah-Hartman &dev_attr_tx_packets.attr, 44243cb76d9SGreg Kroah-Hartman &dev_attr_rx_bytes.attr, 44343cb76d9SGreg Kroah-Hartman &dev_attr_tx_bytes.attr, 44443cb76d9SGreg Kroah-Hartman &dev_attr_rx_errors.attr, 44543cb76d9SGreg Kroah-Hartman &dev_attr_tx_errors.attr, 44643cb76d9SGreg Kroah-Hartman &dev_attr_rx_dropped.attr, 44743cb76d9SGreg Kroah-Hartman &dev_attr_tx_dropped.attr, 44843cb76d9SGreg Kroah-Hartman &dev_attr_multicast.attr, 44943cb76d9SGreg Kroah-Hartman &dev_attr_collisions.attr, 45043cb76d9SGreg Kroah-Hartman &dev_attr_rx_length_errors.attr, 45143cb76d9SGreg Kroah-Hartman &dev_attr_rx_over_errors.attr, 45243cb76d9SGreg Kroah-Hartman &dev_attr_rx_crc_errors.attr, 45343cb76d9SGreg Kroah-Hartman &dev_attr_rx_frame_errors.attr, 45443cb76d9SGreg Kroah-Hartman &dev_attr_rx_fifo_errors.attr, 45543cb76d9SGreg Kroah-Hartman &dev_attr_rx_missed_errors.attr, 45643cb76d9SGreg Kroah-Hartman &dev_attr_tx_aborted_errors.attr, 45743cb76d9SGreg Kroah-Hartman &dev_attr_tx_carrier_errors.attr, 45843cb76d9SGreg Kroah-Hartman &dev_attr_tx_fifo_errors.attr, 45943cb76d9SGreg Kroah-Hartman &dev_attr_tx_heartbeat_errors.attr, 46043cb76d9SGreg Kroah-Hartman &dev_attr_tx_window_errors.attr, 46143cb76d9SGreg Kroah-Hartman &dev_attr_rx_compressed.attr, 46243cb76d9SGreg Kroah-Hartman &dev_attr_tx_compressed.attr, 4631da177e4SLinus Torvalds NULL 4641da177e4SLinus Torvalds }; 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds 4671da177e4SLinus Torvalds static struct attribute_group netstat_group = { 4681da177e4SLinus Torvalds .name = "statistics", 4691da177e4SLinus Torvalds .attrs = netstat_attrs, 4701da177e4SLinus Torvalds }; 47138c1a01cSJohannes Berg 47238c1a01cSJohannes Berg #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) 47338c1a01cSJohannes Berg static struct attribute *wireless_attrs[] = { 47438c1a01cSJohannes Berg NULL 47538c1a01cSJohannes Berg }; 47638c1a01cSJohannes Berg 47738c1a01cSJohannes Berg static struct attribute_group wireless_group = { 47838c1a01cSJohannes Berg .name = "wireless", 47938c1a01cSJohannes Berg .attrs = wireless_attrs, 48038c1a01cSJohannes Berg }; 48138c1a01cSJohannes Berg #endif 482d6523ddfSEric W. Biederman #endif /* CONFIG_SYSFS */ 4831da177e4SLinus Torvalds 48430bde1f5SStephen Rothwell #ifdef CONFIG_RPS 4850a9627f2STom Herbert /* 4860a9627f2STom Herbert * RX queue sysfs structures and functions. 4870a9627f2STom Herbert */ 4880a9627f2STom Herbert struct rx_queue_attribute { 4890a9627f2STom Herbert struct attribute attr; 4900a9627f2STom Herbert ssize_t (*show)(struct netdev_rx_queue *queue, 4910a9627f2STom Herbert struct rx_queue_attribute *attr, char *buf); 4920a9627f2STom Herbert ssize_t (*store)(struct netdev_rx_queue *queue, 4930a9627f2STom Herbert struct rx_queue_attribute *attr, const char *buf, size_t len); 4940a9627f2STom Herbert }; 4950a9627f2STom Herbert #define to_rx_queue_attr(_attr) container_of(_attr, \ 4960a9627f2STom Herbert struct rx_queue_attribute, attr) 4970a9627f2STom Herbert 4980a9627f2STom Herbert #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) 4990a9627f2STom Herbert 5000a9627f2STom Herbert static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, 5010a9627f2STom Herbert char *buf) 5020a9627f2STom Herbert { 5030a9627f2STom Herbert struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); 5040a9627f2STom Herbert struct netdev_rx_queue *queue = to_rx_queue(kobj); 5050a9627f2STom Herbert 5060a9627f2STom Herbert if (!attribute->show) 5070a9627f2STom Herbert return -EIO; 5080a9627f2STom Herbert 5090a9627f2STom Herbert return attribute->show(queue, attribute, buf); 5100a9627f2STom Herbert } 5110a9627f2STom Herbert 5120a9627f2STom Herbert static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, 5130a9627f2STom Herbert const char *buf, size_t count) 5140a9627f2STom Herbert { 5150a9627f2STom Herbert struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); 5160a9627f2STom Herbert struct netdev_rx_queue *queue = to_rx_queue(kobj); 5170a9627f2STom Herbert 5180a9627f2STom Herbert if (!attribute->store) 5190a9627f2STom Herbert return -EIO; 5200a9627f2STom Herbert 5210a9627f2STom Herbert return attribute->store(queue, attribute, buf, count); 5220a9627f2STom Herbert } 5230a9627f2STom Herbert 524fa50d645Sstephen hemminger static const struct sysfs_ops rx_queue_sysfs_ops = { 5250a9627f2STom Herbert .show = rx_queue_attr_show, 5260a9627f2STom Herbert .store = rx_queue_attr_store, 5270a9627f2STom Herbert }; 5280a9627f2STom Herbert 5290a9627f2STom Herbert static ssize_t show_rps_map(struct netdev_rx_queue *queue, 5300a9627f2STom Herbert struct rx_queue_attribute *attribute, char *buf) 5310a9627f2STom Herbert { 5320a9627f2STom Herbert struct rps_map *map; 5330a9627f2STom Herbert cpumask_var_t mask; 5340a9627f2STom Herbert size_t len = 0; 5350a9627f2STom Herbert int i; 5360a9627f2STom Herbert 5370a9627f2STom Herbert if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) 5380a9627f2STom Herbert return -ENOMEM; 5390a9627f2STom Herbert 5400a9627f2STom Herbert rcu_read_lock(); 5410a9627f2STom Herbert map = rcu_dereference(queue->rps_map); 5420a9627f2STom Herbert if (map) 5430a9627f2STom Herbert for (i = 0; i < map->len; i++) 5440a9627f2STom Herbert cpumask_set_cpu(map->cpus[i], mask); 5450a9627f2STom Herbert 5460a9627f2STom Herbert len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); 5470a9627f2STom Herbert if (PAGE_SIZE - len < 3) { 5480a9627f2STom Herbert rcu_read_unlock(); 5490a9627f2STom Herbert free_cpumask_var(mask); 5500a9627f2STom Herbert return -EINVAL; 5510a9627f2STom Herbert } 5520a9627f2STom Herbert rcu_read_unlock(); 5530a9627f2STom Herbert 5540a9627f2STom Herbert free_cpumask_var(mask); 5550a9627f2STom Herbert len += sprintf(buf + len, "\n"); 5560a9627f2STom Herbert return len; 5570a9627f2STom Herbert } 5580a9627f2STom Herbert 559f5acb907SEric Dumazet static ssize_t store_rps_map(struct netdev_rx_queue *queue, 5600a9627f2STom Herbert struct rx_queue_attribute *attribute, 5610a9627f2STom Herbert const char *buf, size_t len) 5620a9627f2STom Herbert { 5630a9627f2STom Herbert struct rps_map *old_map, *map; 5640a9627f2STom Herbert cpumask_var_t mask; 5650a9627f2STom Herbert int err, cpu, i; 5660a9627f2STom Herbert static DEFINE_SPINLOCK(rps_map_lock); 5670a9627f2STom Herbert 5680a9627f2STom Herbert if (!capable(CAP_NET_ADMIN)) 5690a9627f2STom Herbert return -EPERM; 5700a9627f2STom Herbert 5710a9627f2STom Herbert if (!alloc_cpumask_var(&mask, GFP_KERNEL)) 5720a9627f2STom Herbert return -ENOMEM; 5730a9627f2STom Herbert 5740a9627f2STom Herbert err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); 5750a9627f2STom Herbert if (err) { 5760a9627f2STom Herbert free_cpumask_var(mask); 5770a9627f2STom Herbert return err; 5780a9627f2STom Herbert } 5790a9627f2STom Herbert 58095c96174SEric Dumazet map = kzalloc(max_t(unsigned int, 5810a9627f2STom Herbert RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), 5820a9627f2STom Herbert GFP_KERNEL); 5830a9627f2STom Herbert if (!map) { 5840a9627f2STom Herbert free_cpumask_var(mask); 5850a9627f2STom Herbert return -ENOMEM; 5860a9627f2STom Herbert } 5870a9627f2STom Herbert 5880a9627f2STom Herbert i = 0; 5890a9627f2STom Herbert for_each_cpu_and(cpu, mask, cpu_online_mask) 5900a9627f2STom Herbert map->cpus[i++] = cpu; 5910a9627f2STom Herbert 5920a9627f2STom Herbert if (i) 5930a9627f2STom Herbert map->len = i; 5940a9627f2STom Herbert else { 5950a9627f2STom Herbert kfree(map); 5960a9627f2STom Herbert map = NULL; 5970a9627f2STom Herbert } 5980a9627f2STom Herbert 5990a9627f2STom Herbert spin_lock(&rps_map_lock); 6006e3f7fafSEric Dumazet old_map = rcu_dereference_protected(queue->rps_map, 6016e3f7fafSEric Dumazet lockdep_is_held(&rps_map_lock)); 6020a9627f2STom Herbert rcu_assign_pointer(queue->rps_map, map); 6030a9627f2STom Herbert spin_unlock(&rps_map_lock); 6040a9627f2STom Herbert 605adc9300eSEric Dumazet if (map) 606c5905afbSIngo Molnar static_key_slow_inc(&rps_needed); 607adc9300eSEric Dumazet if (old_map) { 608f6f80238SLai Jiangshan kfree_rcu(old_map, rcu); 609c5905afbSIngo Molnar static_key_slow_dec(&rps_needed); 610adc9300eSEric Dumazet } 6110a9627f2STom Herbert free_cpumask_var(mask); 6120a9627f2STom Herbert return len; 6130a9627f2STom Herbert } 6140a9627f2STom Herbert 615fec5e652STom Herbert static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, 616fec5e652STom Herbert struct rx_queue_attribute *attr, 617fec5e652STom Herbert char *buf) 618fec5e652STom Herbert { 619fec5e652STom Herbert struct rps_dev_flow_table *flow_table; 62060b778ceSEric Dumazet unsigned long val = 0; 621fec5e652STom Herbert 622fec5e652STom Herbert rcu_read_lock(); 623fec5e652STom Herbert flow_table = rcu_dereference(queue->rps_flow_table); 624fec5e652STom Herbert if (flow_table) 62560b778ceSEric Dumazet val = (unsigned long)flow_table->mask + 1; 626fec5e652STom Herbert rcu_read_unlock(); 627fec5e652STom Herbert 62860b778ceSEric Dumazet return sprintf(buf, "%lu\n", val); 629fec5e652STom Herbert } 630fec5e652STom Herbert 631fec5e652STom Herbert static void rps_dev_flow_table_release(struct rcu_head *rcu) 632fec5e652STom Herbert { 633fec5e652STom Herbert struct rps_dev_flow_table *table = container_of(rcu, 634fec5e652STom Herbert struct rps_dev_flow_table, rcu); 635243198d0SAl Viro vfree(table); 636fec5e652STom Herbert } 637fec5e652STom Herbert 638f5acb907SEric Dumazet static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, 639fec5e652STom Herbert struct rx_queue_attribute *attr, 640fec5e652STom Herbert const char *buf, size_t len) 641fec5e652STom Herbert { 64260b778ceSEric Dumazet unsigned long mask, count; 643fec5e652STom Herbert struct rps_dev_flow_table *table, *old_table; 644fec5e652STom Herbert static DEFINE_SPINLOCK(rps_dev_flow_lock); 64560b778ceSEric Dumazet int rc; 646fec5e652STom Herbert 647fec5e652STom Herbert if (!capable(CAP_NET_ADMIN)) 648fec5e652STom Herbert return -EPERM; 649fec5e652STom Herbert 65060b778ceSEric Dumazet rc = kstrtoul(buf, 0, &count); 65160b778ceSEric Dumazet if (rc < 0) 65260b778ceSEric Dumazet return rc; 653fec5e652STom Herbert 654fec5e652STom Herbert if (count) { 65560b778ceSEric Dumazet mask = count - 1; 65660b778ceSEric Dumazet /* mask = roundup_pow_of_two(count) - 1; 65760b778ceSEric Dumazet * without overflows... 65860b778ceSEric Dumazet */ 65960b778ceSEric Dumazet while ((mask | (mask >> 1)) != mask) 66060b778ceSEric Dumazet mask |= (mask >> 1); 66160b778ceSEric Dumazet /* On 64 bit arches, must check mask fits in table->mask (u32), 66260b778ceSEric Dumazet * and on 32bit arches, must check RPS_DEV_FLOW_TABLE_SIZE(mask + 1) 66360b778ceSEric Dumazet * doesnt overflow. 66460b778ceSEric Dumazet */ 66560b778ceSEric Dumazet #if BITS_PER_LONG > 32 66660b778ceSEric Dumazet if (mask > (unsigned long)(u32)mask) 667a0a129f8SXi Wang return -EINVAL; 66860b778ceSEric Dumazet #else 66960b778ceSEric Dumazet if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) 670a0a129f8SXi Wang / sizeof(struct rps_dev_flow)) { 671fec5e652STom Herbert /* Enforce a limit to prevent overflow */ 672fec5e652STom Herbert return -EINVAL; 673fec5e652STom Herbert } 67460b778ceSEric Dumazet #endif 67560b778ceSEric Dumazet table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); 676fec5e652STom Herbert if (!table) 677fec5e652STom Herbert return -ENOMEM; 678fec5e652STom Herbert 67960b778ceSEric Dumazet table->mask = mask; 68060b778ceSEric Dumazet for (count = 0; count <= mask; count++) 68160b778ceSEric Dumazet table->flows[count].cpu = RPS_NO_CPU; 682fec5e652STom Herbert } else 683fec5e652STom Herbert table = NULL; 684fec5e652STom Herbert 685fec5e652STom Herbert spin_lock(&rps_dev_flow_lock); 6866e3f7fafSEric Dumazet old_table = rcu_dereference_protected(queue->rps_flow_table, 6876e3f7fafSEric Dumazet lockdep_is_held(&rps_dev_flow_lock)); 688fec5e652STom Herbert rcu_assign_pointer(queue->rps_flow_table, table); 689fec5e652STom Herbert spin_unlock(&rps_dev_flow_lock); 690fec5e652STom Herbert 691fec5e652STom Herbert if (old_table) 692fec5e652STom Herbert call_rcu(&old_table->rcu, rps_dev_flow_table_release); 693fec5e652STom Herbert 694fec5e652STom Herbert return len; 695fec5e652STom Herbert } 696fec5e652STom Herbert 6970a9627f2STom Herbert static struct rx_queue_attribute rps_cpus_attribute = 6980a9627f2STom Herbert __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); 6990a9627f2STom Herbert 700fec5e652STom Herbert 701fec5e652STom Herbert static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = 702fec5e652STom Herbert __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, 703fec5e652STom Herbert show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); 704fec5e652STom Herbert 7050a9627f2STom Herbert static struct attribute *rx_queue_default_attrs[] = { 7060a9627f2STom Herbert &rps_cpus_attribute.attr, 707fec5e652STom Herbert &rps_dev_flow_table_cnt_attribute.attr, 7080a9627f2STom Herbert NULL 7090a9627f2STom Herbert }; 7100a9627f2STom Herbert 7110a9627f2STom Herbert static void rx_queue_release(struct kobject *kobj) 7120a9627f2STom Herbert { 7130a9627f2STom Herbert struct netdev_rx_queue *queue = to_rx_queue(kobj); 7146e3f7fafSEric Dumazet struct rps_map *map; 7156e3f7fafSEric Dumazet struct rps_dev_flow_table *flow_table; 7160a9627f2STom Herbert 717fec5e652STom Herbert 71833d480ceSEric Dumazet map = rcu_dereference_protected(queue->rps_map, 1); 7199ea19481SJohn Fastabend if (map) { 7209ea19481SJohn Fastabend RCU_INIT_POINTER(queue->rps_map, NULL); 721f6f80238SLai Jiangshan kfree_rcu(map, rcu); 7229ea19481SJohn Fastabend } 7236e3f7fafSEric Dumazet 72433d480ceSEric Dumazet flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); 7259ea19481SJohn Fastabend if (flow_table) { 7269ea19481SJohn Fastabend RCU_INIT_POINTER(queue->rps_flow_table, NULL); 7276e3f7fafSEric Dumazet call_rcu(&flow_table->rcu, rps_dev_flow_table_release); 7289ea19481SJohn Fastabend } 7290a9627f2STom Herbert 7309ea19481SJohn Fastabend memset(kobj, 0, sizeof(*kobj)); 731fe822240STom Herbert dev_put(queue->dev); 7320a9627f2STom Herbert } 7330a9627f2STom Herbert 7340a9627f2STom Herbert static struct kobj_type rx_queue_ktype = { 7350a9627f2STom Herbert .sysfs_ops = &rx_queue_sysfs_ops, 7360a9627f2STom Herbert .release = rx_queue_release, 7370a9627f2STom Herbert .default_attrs = rx_queue_default_attrs, 7380a9627f2STom Herbert }; 7390a9627f2STom Herbert 7400a9627f2STom Herbert static int rx_queue_add_kobject(struct net_device *net, int index) 7410a9627f2STom Herbert { 7420a9627f2STom Herbert struct netdev_rx_queue *queue = net->_rx + index; 7430a9627f2STom Herbert struct kobject *kobj = &queue->kobj; 7440a9627f2STom Herbert int error = 0; 7450a9627f2STom Herbert 7460a9627f2STom Herbert kobj->kset = net->queues_kset; 7470a9627f2STom Herbert error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, 7480a9627f2STom Herbert "rx-%u", index); 7490a9627f2STom Herbert if (error) { 7500a9627f2STom Herbert kobject_put(kobj); 7510a9627f2STom Herbert return error; 7520a9627f2STom Herbert } 7530a9627f2STom Herbert 7540a9627f2STom Herbert kobject_uevent(kobj, KOBJ_ADD); 755fe822240STom Herbert dev_hold(queue->dev); 7560a9627f2STom Herbert 7570a9627f2STom Herbert return error; 7580a9627f2STom Herbert } 759bf264145STom Herbert #endif /* CONFIG_RPS */ 7600a9627f2STom Herbert 76162fe0b40SBen Hutchings int 76262fe0b40SBen Hutchings net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num) 7630a9627f2STom Herbert { 764bf264145STom Herbert #ifdef CONFIG_RPS 7650a9627f2STom Herbert int i; 7660a9627f2STom Herbert int error = 0; 7670a9627f2STom Herbert 76862fe0b40SBen Hutchings for (i = old_num; i < new_num; i++) { 7690a9627f2STom Herbert error = rx_queue_add_kobject(net, i); 77062fe0b40SBen Hutchings if (error) { 77162fe0b40SBen Hutchings new_num = old_num; 7720a9627f2STom Herbert break; 7730a9627f2STom Herbert } 77462fe0b40SBen Hutchings } 7750a9627f2STom Herbert 77662fe0b40SBen Hutchings while (--i >= new_num) 7770a9627f2STom Herbert kobject_put(&net->_rx[i].kobj); 7780a9627f2STom Herbert 7790a9627f2STom Herbert return error; 780bf264145STom Herbert #else 781bf264145STom Herbert return 0; 782bf264145STom Herbert #endif 7830a9627f2STom Herbert } 7840a9627f2STom Herbert 785ccf5ff69Sdavid decotigny #ifdef CONFIG_SYSFS 7861d24eb48STom Herbert /* 7871d24eb48STom Herbert * netdev_queue sysfs structures and functions. 7881d24eb48STom Herbert */ 7891d24eb48STom Herbert struct netdev_queue_attribute { 7901d24eb48STom Herbert struct attribute attr; 7911d24eb48STom Herbert ssize_t (*show)(struct netdev_queue *queue, 7921d24eb48STom Herbert struct netdev_queue_attribute *attr, char *buf); 7931d24eb48STom Herbert ssize_t (*store)(struct netdev_queue *queue, 7941d24eb48STom Herbert struct netdev_queue_attribute *attr, const char *buf, size_t len); 7951d24eb48STom Herbert }; 7961d24eb48STom Herbert #define to_netdev_queue_attr(_attr) container_of(_attr, \ 7971d24eb48STom Herbert struct netdev_queue_attribute, attr) 7981d24eb48STom Herbert 7991d24eb48STom Herbert #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) 8001d24eb48STom Herbert 8011d24eb48STom Herbert static ssize_t netdev_queue_attr_show(struct kobject *kobj, 8021d24eb48STom Herbert struct attribute *attr, char *buf) 80362fe0b40SBen Hutchings { 8041d24eb48STom Herbert struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); 8051d24eb48STom Herbert struct netdev_queue *queue = to_netdev_queue(kobj); 8061d24eb48STom Herbert 8071d24eb48STom Herbert if (!attribute->show) 8081d24eb48STom Herbert return -EIO; 8091d24eb48STom Herbert 8101d24eb48STom Herbert return attribute->show(queue, attribute, buf); 8111d24eb48STom Herbert } 8121d24eb48STom Herbert 8131d24eb48STom Herbert static ssize_t netdev_queue_attr_store(struct kobject *kobj, 8141d24eb48STom Herbert struct attribute *attr, 8151d24eb48STom Herbert const char *buf, size_t count) 8161d24eb48STom Herbert { 8171d24eb48STom Herbert struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); 8181d24eb48STom Herbert struct netdev_queue *queue = to_netdev_queue(kobj); 8191d24eb48STom Herbert 8201d24eb48STom Herbert if (!attribute->store) 8211d24eb48STom Herbert return -EIO; 8221d24eb48STom Herbert 8231d24eb48STom Herbert return attribute->store(queue, attribute, buf, count); 8241d24eb48STom Herbert } 8251d24eb48STom Herbert 8261d24eb48STom Herbert static const struct sysfs_ops netdev_queue_sysfs_ops = { 8271d24eb48STom Herbert .show = netdev_queue_attr_show, 8281d24eb48STom Herbert .store = netdev_queue_attr_store, 8291d24eb48STom Herbert }; 8301d24eb48STom Herbert 831ccf5ff69Sdavid decotigny static ssize_t show_trans_timeout(struct netdev_queue *queue, 832ccf5ff69Sdavid decotigny struct netdev_queue_attribute *attribute, 833ccf5ff69Sdavid decotigny char *buf) 834ccf5ff69Sdavid decotigny { 835ccf5ff69Sdavid decotigny unsigned long trans_timeout; 836ccf5ff69Sdavid decotigny 837ccf5ff69Sdavid decotigny spin_lock_irq(&queue->_xmit_lock); 838ccf5ff69Sdavid decotigny trans_timeout = queue->trans_timeout; 839ccf5ff69Sdavid decotigny spin_unlock_irq(&queue->_xmit_lock); 840ccf5ff69Sdavid decotigny 841ccf5ff69Sdavid decotigny return sprintf(buf, "%lu", trans_timeout); 842ccf5ff69Sdavid decotigny } 843ccf5ff69Sdavid decotigny 844ccf5ff69Sdavid decotigny static struct netdev_queue_attribute queue_trans_timeout = 845ccf5ff69Sdavid decotigny __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL); 846ccf5ff69Sdavid decotigny 847114cf580STom Herbert #ifdef CONFIG_BQL 848114cf580STom Herbert /* 849114cf580STom Herbert * Byte queue limits sysfs structures and functions. 850114cf580STom Herbert */ 851114cf580STom Herbert static ssize_t bql_show(char *buf, unsigned int value) 852114cf580STom Herbert { 853114cf580STom Herbert return sprintf(buf, "%u\n", value); 854114cf580STom Herbert } 855114cf580STom Herbert 856114cf580STom Herbert static ssize_t bql_set(const char *buf, const size_t count, 857114cf580STom Herbert unsigned int *pvalue) 858114cf580STom Herbert { 859114cf580STom Herbert unsigned int value; 860114cf580STom Herbert int err; 861114cf580STom Herbert 862114cf580STom Herbert if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) 863114cf580STom Herbert value = DQL_MAX_LIMIT; 864114cf580STom Herbert else { 865114cf580STom Herbert err = kstrtouint(buf, 10, &value); 866114cf580STom Herbert if (err < 0) 867114cf580STom Herbert return err; 868114cf580STom Herbert if (value > DQL_MAX_LIMIT) 869114cf580STom Herbert return -EINVAL; 870114cf580STom Herbert } 871114cf580STom Herbert 872114cf580STom Herbert *pvalue = value; 873114cf580STom Herbert 874114cf580STom Herbert return count; 875114cf580STom Herbert } 876114cf580STom Herbert 877114cf580STom Herbert static ssize_t bql_show_hold_time(struct netdev_queue *queue, 878114cf580STom Herbert struct netdev_queue_attribute *attr, 879114cf580STom Herbert char *buf) 880114cf580STom Herbert { 881114cf580STom Herbert struct dql *dql = &queue->dql; 882114cf580STom Herbert 883114cf580STom Herbert return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); 884114cf580STom Herbert } 885114cf580STom Herbert 886114cf580STom Herbert static ssize_t bql_set_hold_time(struct netdev_queue *queue, 887114cf580STom Herbert struct netdev_queue_attribute *attribute, 888114cf580STom Herbert const char *buf, size_t len) 889114cf580STom Herbert { 890114cf580STom Herbert struct dql *dql = &queue->dql; 89195c96174SEric Dumazet unsigned int value; 892114cf580STom Herbert int err; 893114cf580STom Herbert 894114cf580STom Herbert err = kstrtouint(buf, 10, &value); 895114cf580STom Herbert if (err < 0) 896114cf580STom Herbert return err; 897114cf580STom Herbert 898114cf580STom Herbert dql->slack_hold_time = msecs_to_jiffies(value); 899114cf580STom Herbert 900114cf580STom Herbert return len; 901114cf580STom Herbert } 902114cf580STom Herbert 903114cf580STom Herbert static struct netdev_queue_attribute bql_hold_time_attribute = 904114cf580STom Herbert __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time, 905114cf580STom Herbert bql_set_hold_time); 906114cf580STom Herbert 907114cf580STom Herbert static ssize_t bql_show_inflight(struct netdev_queue *queue, 908114cf580STom Herbert struct netdev_queue_attribute *attr, 909114cf580STom Herbert char *buf) 910114cf580STom Herbert { 911114cf580STom Herbert struct dql *dql = &queue->dql; 912114cf580STom Herbert 913114cf580STom Herbert return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); 914114cf580STom Herbert } 915114cf580STom Herbert 916114cf580STom Herbert static struct netdev_queue_attribute bql_inflight_attribute = 917795d9a25SHiroaki SHIMODA __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL); 918114cf580STom Herbert 919114cf580STom Herbert #define BQL_ATTR(NAME, FIELD) \ 920114cf580STom Herbert static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ 921114cf580STom Herbert struct netdev_queue_attribute *attr, \ 922114cf580STom Herbert char *buf) \ 923114cf580STom Herbert { \ 924114cf580STom Herbert return bql_show(buf, queue->dql.FIELD); \ 925114cf580STom Herbert } \ 926114cf580STom Herbert \ 927114cf580STom Herbert static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ 928114cf580STom Herbert struct netdev_queue_attribute *attr, \ 929114cf580STom Herbert const char *buf, size_t len) \ 930114cf580STom Herbert { \ 931114cf580STom Herbert return bql_set(buf, len, &queue->dql.FIELD); \ 932114cf580STom Herbert } \ 933114cf580STom Herbert \ 934114cf580STom Herbert static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \ 935114cf580STom Herbert __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \ 936114cf580STom Herbert bql_set_ ## NAME); 937114cf580STom Herbert 938114cf580STom Herbert BQL_ATTR(limit, limit) 939114cf580STom Herbert BQL_ATTR(limit_max, max_limit) 940114cf580STom Herbert BQL_ATTR(limit_min, min_limit) 941114cf580STom Herbert 942114cf580STom Herbert static struct attribute *dql_attrs[] = { 943114cf580STom Herbert &bql_limit_attribute.attr, 944114cf580STom Herbert &bql_limit_max_attribute.attr, 945114cf580STom Herbert &bql_limit_min_attribute.attr, 946114cf580STom Herbert &bql_hold_time_attribute.attr, 947114cf580STom Herbert &bql_inflight_attribute.attr, 948114cf580STom Herbert NULL 949114cf580STom Herbert }; 950114cf580STom Herbert 951114cf580STom Herbert static struct attribute_group dql_group = { 952114cf580STom Herbert .name = "byte_queue_limits", 953114cf580STom Herbert .attrs = dql_attrs, 954114cf580STom Herbert }; 955114cf580STom Herbert #endif /* CONFIG_BQL */ 956114cf580STom Herbert 957ccf5ff69Sdavid decotigny #ifdef CONFIG_XPS 9581d24eb48STom Herbert static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue) 9591d24eb48STom Herbert { 9601d24eb48STom Herbert struct net_device *dev = queue->dev; 9611d24eb48STom Herbert int i; 9621d24eb48STom Herbert 9631d24eb48STom Herbert for (i = 0; i < dev->num_tx_queues; i++) 9641d24eb48STom Herbert if (queue == &dev->_tx[i]) 9651d24eb48STom Herbert break; 9661d24eb48STom Herbert 9671d24eb48STom Herbert BUG_ON(i >= dev->num_tx_queues); 9681d24eb48STom Herbert 9691d24eb48STom Herbert return i; 9701d24eb48STom Herbert } 9711d24eb48STom Herbert 9721d24eb48STom Herbert 9731d24eb48STom Herbert static ssize_t show_xps_map(struct netdev_queue *queue, 9741d24eb48STom Herbert struct netdev_queue_attribute *attribute, char *buf) 9751d24eb48STom Herbert { 9761d24eb48STom Herbert struct net_device *dev = queue->dev; 9771d24eb48STom Herbert struct xps_dev_maps *dev_maps; 9781d24eb48STom Herbert cpumask_var_t mask; 9791d24eb48STom Herbert unsigned long index; 9801d24eb48STom Herbert size_t len = 0; 9811d24eb48STom Herbert int i; 9821d24eb48STom Herbert 9831d24eb48STom Herbert if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) 9841d24eb48STom Herbert return -ENOMEM; 9851d24eb48STom Herbert 9861d24eb48STom Herbert index = get_netdev_queue_index(queue); 9871d24eb48STom Herbert 9881d24eb48STom Herbert rcu_read_lock(); 9891d24eb48STom Herbert dev_maps = rcu_dereference(dev->xps_maps); 9901d24eb48STom Herbert if (dev_maps) { 9911d24eb48STom Herbert for_each_possible_cpu(i) { 9921d24eb48STom Herbert struct xps_map *map = 9931d24eb48STom Herbert rcu_dereference(dev_maps->cpu_map[i]); 9941d24eb48STom Herbert if (map) { 9951d24eb48STom Herbert int j; 9961d24eb48STom Herbert for (j = 0; j < map->len; j++) { 9971d24eb48STom Herbert if (map->queues[j] == index) { 9981d24eb48STom Herbert cpumask_set_cpu(i, mask); 9991d24eb48STom Herbert break; 10001d24eb48STom Herbert } 10011d24eb48STom Herbert } 10021d24eb48STom Herbert } 10031d24eb48STom Herbert } 10041d24eb48STom Herbert } 10051d24eb48STom Herbert rcu_read_unlock(); 10061d24eb48STom Herbert 10071d24eb48STom Herbert len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); 10081d24eb48STom Herbert if (PAGE_SIZE - len < 3) { 10091d24eb48STom Herbert free_cpumask_var(mask); 10101d24eb48STom Herbert return -EINVAL; 10111d24eb48STom Herbert } 10121d24eb48STom Herbert 10131d24eb48STom Herbert free_cpumask_var(mask); 10141d24eb48STom Herbert len += sprintf(buf + len, "\n"); 10151d24eb48STom Herbert return len; 10161d24eb48STom Herbert } 10171d24eb48STom Herbert 10181d24eb48STom Herbert static ssize_t store_xps_map(struct netdev_queue *queue, 10191d24eb48STom Herbert struct netdev_queue_attribute *attribute, 10201d24eb48STom Herbert const char *buf, size_t len) 10211d24eb48STom Herbert { 10221d24eb48STom Herbert struct net_device *dev = queue->dev; 10231d24eb48STom Herbert unsigned long index; 1024537c00deSAlexander Duyck cpumask_var_t mask; 1025537c00deSAlexander Duyck int err; 10261d24eb48STom Herbert 10271d24eb48STom Herbert if (!capable(CAP_NET_ADMIN)) 10281d24eb48STom Herbert return -EPERM; 10291d24eb48STom Herbert 10301d24eb48STom Herbert if (!alloc_cpumask_var(&mask, GFP_KERNEL)) 10311d24eb48STom Herbert return -ENOMEM; 10321d24eb48STom Herbert 10331d24eb48STom Herbert index = get_netdev_queue_index(queue); 10341d24eb48STom Herbert 10351d24eb48STom Herbert err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); 10361d24eb48STom Herbert if (err) { 10371d24eb48STom Herbert free_cpumask_var(mask); 10381d24eb48STom Herbert return err; 10391d24eb48STom Herbert } 10401d24eb48STom Herbert 1041537c00deSAlexander Duyck err = netif_set_xps_queue(dev, mask, index); 10421d24eb48STom Herbert 10431d24eb48STom Herbert free_cpumask_var(mask); 10441d24eb48STom Herbert 1045537c00deSAlexander Duyck return err ? : len; 10461d24eb48STom Herbert } 10471d24eb48STom Herbert 10481d24eb48STom Herbert static struct netdev_queue_attribute xps_cpus_attribute = 10491d24eb48STom Herbert __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); 1050ccf5ff69Sdavid decotigny #endif /* CONFIG_XPS */ 10511d24eb48STom Herbert 10521d24eb48STom Herbert static struct attribute *netdev_queue_default_attrs[] = { 1053ccf5ff69Sdavid decotigny &queue_trans_timeout.attr, 1054ccf5ff69Sdavid decotigny #ifdef CONFIG_XPS 10551d24eb48STom Herbert &xps_cpus_attribute.attr, 1056ccf5ff69Sdavid decotigny #endif 10571d24eb48STom Herbert NULL 10581d24eb48STom Herbert }; 10591d24eb48STom Herbert 10601d24eb48STom Herbert static void netdev_queue_release(struct kobject *kobj) 10611d24eb48STom Herbert { 10621d24eb48STom Herbert struct netdev_queue *queue = to_netdev_queue(kobj); 10631d24eb48STom Herbert 10641d24eb48STom Herbert memset(kobj, 0, sizeof(*kobj)); 10651d24eb48STom Herbert dev_put(queue->dev); 10661d24eb48STom Herbert } 10671d24eb48STom Herbert 10681d24eb48STom Herbert static struct kobj_type netdev_queue_ktype = { 10691d24eb48STom Herbert .sysfs_ops = &netdev_queue_sysfs_ops, 10701d24eb48STom Herbert .release = netdev_queue_release, 10711d24eb48STom Herbert .default_attrs = netdev_queue_default_attrs, 10721d24eb48STom Herbert }; 10731d24eb48STom Herbert 10741d24eb48STom Herbert static int netdev_queue_add_kobject(struct net_device *net, int index) 10751d24eb48STom Herbert { 10761d24eb48STom Herbert struct netdev_queue *queue = net->_tx + index; 10771d24eb48STom Herbert struct kobject *kobj = &queue->kobj; 10781d24eb48STom Herbert int error = 0; 10791d24eb48STom Herbert 10801d24eb48STom Herbert kobj->kset = net->queues_kset; 10811d24eb48STom Herbert error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, 10821d24eb48STom Herbert "tx-%u", index); 1083114cf580STom Herbert if (error) 1084114cf580STom Herbert goto exit; 1085114cf580STom Herbert 1086114cf580STom Herbert #ifdef CONFIG_BQL 1087114cf580STom Herbert error = sysfs_create_group(kobj, &dql_group); 1088114cf580STom Herbert if (error) 1089114cf580STom Herbert goto exit; 1090114cf580STom Herbert #endif 10911d24eb48STom Herbert 10921d24eb48STom Herbert kobject_uevent(kobj, KOBJ_ADD); 10931d24eb48STom Herbert dev_hold(queue->dev); 10941d24eb48STom Herbert 1095114cf580STom Herbert return 0; 1096114cf580STom Herbert exit: 1097114cf580STom Herbert kobject_put(kobj); 10981d24eb48STom Herbert return error; 10991d24eb48STom Herbert } 1100ccf5ff69Sdavid decotigny #endif /* CONFIG_SYSFS */ 11011d24eb48STom Herbert 11021d24eb48STom Herbert int 11031d24eb48STom Herbert netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num) 11041d24eb48STom Herbert { 1105ccf5ff69Sdavid decotigny #ifdef CONFIG_SYSFS 11061d24eb48STom Herbert int i; 11071d24eb48STom Herbert int error = 0; 11081d24eb48STom Herbert 11091d24eb48STom Herbert for (i = old_num; i < new_num; i++) { 11101d24eb48STom Herbert error = netdev_queue_add_kobject(net, i); 11111d24eb48STom Herbert if (error) { 11121d24eb48STom Herbert new_num = old_num; 11131d24eb48STom Herbert break; 11141d24eb48STom Herbert } 11151d24eb48STom Herbert } 11161d24eb48STom Herbert 1117114cf580STom Herbert while (--i >= new_num) { 1118114cf580STom Herbert struct netdev_queue *queue = net->_tx + i; 1119114cf580STom Herbert 1120114cf580STom Herbert #ifdef CONFIG_BQL 1121114cf580STom Herbert sysfs_remove_group(&queue->kobj, &dql_group); 1122114cf580STom Herbert #endif 1123114cf580STom Herbert kobject_put(&queue->kobj); 1124114cf580STom Herbert } 11251d24eb48STom Herbert 11261d24eb48STom Herbert return error; 1127bf264145STom Herbert #else 1128bf264145STom Herbert return 0; 1129ccf5ff69Sdavid decotigny #endif /* CONFIG_SYSFS */ 11301d24eb48STom Herbert } 11311d24eb48STom Herbert 11321d24eb48STom Herbert static int register_queue_kobjects(struct net_device *net) 11331d24eb48STom Herbert { 1134bf264145STom Herbert int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; 11351d24eb48STom Herbert 1136ccf5ff69Sdavid decotigny #ifdef CONFIG_SYSFS 113762fe0b40SBen Hutchings net->queues_kset = kset_create_and_add("queues", 113862fe0b40SBen Hutchings NULL, &net->dev.kobj); 113962fe0b40SBen Hutchings if (!net->queues_kset) 114062fe0b40SBen Hutchings return -ENOMEM; 1141bf264145STom Herbert #endif 11421d24eb48STom Herbert 1143bf264145STom Herbert #ifdef CONFIG_RPS 1144bf264145STom Herbert real_rx = net->real_num_rx_queues; 1145bf264145STom Herbert #endif 1146bf264145STom Herbert real_tx = net->real_num_tx_queues; 1147bf264145STom Herbert 1148bf264145STom Herbert error = net_rx_queue_update_kobjects(net, 0, real_rx); 11491d24eb48STom Herbert if (error) 11501d24eb48STom Herbert goto error; 1151bf264145STom Herbert rxq = real_rx; 11521d24eb48STom Herbert 1153bf264145STom Herbert error = netdev_queue_update_kobjects(net, 0, real_tx); 11541d24eb48STom Herbert if (error) 11551d24eb48STom Herbert goto error; 1156bf264145STom Herbert txq = real_tx; 11571d24eb48STom Herbert 11581d24eb48STom Herbert return 0; 11591d24eb48STom Herbert 11601d24eb48STom Herbert error: 11611d24eb48STom Herbert netdev_queue_update_kobjects(net, txq, 0); 11621d24eb48STom Herbert net_rx_queue_update_kobjects(net, rxq, 0); 11631d24eb48STom Herbert return error; 116462fe0b40SBen Hutchings } 116562fe0b40SBen Hutchings 11661d24eb48STom Herbert static void remove_queue_kobjects(struct net_device *net) 11670a9627f2STom Herbert { 1168bf264145STom Herbert int real_rx = 0, real_tx = 0; 1169bf264145STom Herbert 1170bf264145STom Herbert #ifdef CONFIG_RPS 1171bf264145STom Herbert real_rx = net->real_num_rx_queues; 1172bf264145STom Herbert #endif 1173bf264145STom Herbert real_tx = net->real_num_tx_queues; 1174bf264145STom Herbert 1175bf264145STom Herbert net_rx_queue_update_kobjects(net, real_rx, 0); 1176bf264145STom Herbert netdev_queue_update_kobjects(net, real_tx, 0); 1177ccf5ff69Sdavid decotigny #ifdef CONFIG_SYSFS 11780a9627f2STom Herbert kset_unregister(net->queues_kset); 1179bf264145STom Herbert #endif 11800a9627f2STom Herbert } 1181608b4b95SEric W. Biederman 1182a685e089SAl Viro static void *net_grab_current_ns(void) 1183608b4b95SEric W. Biederman { 1184a685e089SAl Viro struct net *ns = current->nsproxy->net_ns; 1185a685e089SAl Viro #ifdef CONFIG_NET_NS 1186a685e089SAl Viro if (ns) 1187a685e089SAl Viro atomic_inc(&ns->passive); 1188a685e089SAl Viro #endif 1189a685e089SAl Viro return ns; 1190608b4b95SEric W. Biederman } 1191608b4b95SEric W. Biederman 1192608b4b95SEric W. Biederman static const void *net_initial_ns(void) 1193608b4b95SEric W. Biederman { 1194608b4b95SEric W. Biederman return &init_net; 1195608b4b95SEric W. Biederman } 1196608b4b95SEric W. Biederman 1197608b4b95SEric W. Biederman static const void *net_netlink_ns(struct sock *sk) 1198608b4b95SEric W. Biederman { 1199608b4b95SEric W. Biederman return sock_net(sk); 1200608b4b95SEric W. Biederman } 1201608b4b95SEric W. Biederman 120204600794SJohannes Berg struct kobj_ns_type_operations net_ns_type_operations = { 1203608b4b95SEric W. Biederman .type = KOBJ_NS_TYPE_NET, 1204a685e089SAl Viro .grab_current_ns = net_grab_current_ns, 1205608b4b95SEric W. Biederman .netlink_ns = net_netlink_ns, 1206608b4b95SEric W. Biederman .initial_ns = net_initial_ns, 1207a685e089SAl Viro .drop_ns = net_drop_ns, 1208608b4b95SEric W. Biederman }; 120904600794SJohannes Berg EXPORT_SYMBOL_GPL(net_ns_type_operations); 1210608b4b95SEric W. Biederman 12117eff2e7aSKay Sievers static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) 12121da177e4SLinus Torvalds { 121343cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 12147eff2e7aSKay Sievers int retval; 12151da177e4SLinus Torvalds 1216312c004dSKay Sievers /* pass interface to uevent. */ 12177eff2e7aSKay Sievers retval = add_uevent_var(env, "INTERFACE=%s", dev->name); 1218bf62456eSEric Rannaud if (retval) 1219bf62456eSEric Rannaud goto exit; 12201da177e4SLinus Torvalds 1221ca2f37dbSJean Tourrilhes /* pass ifindex to uevent. 1222ca2f37dbSJean Tourrilhes * ifindex is useful as it won't change (interface name may change) 1223ca2f37dbSJean Tourrilhes * and is what RtNetlink uses natively. */ 12247eff2e7aSKay Sievers retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); 1225ca2f37dbSJean Tourrilhes 1226bf62456eSEric Rannaud exit: 1227bf62456eSEric Rannaud return retval; 12281da177e4SLinus Torvalds } 12291da177e4SLinus Torvalds 12301da177e4SLinus Torvalds /* 12311da177e4SLinus Torvalds * netdev_release -- destroy and free a dead device. 123243cb76d9SGreg Kroah-Hartman * Called when last reference to device kobject is gone. 12331da177e4SLinus Torvalds */ 123443cb76d9SGreg Kroah-Hartman static void netdev_release(struct device *d) 12351da177e4SLinus Torvalds { 123643cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 12371da177e4SLinus Torvalds 12381da177e4SLinus Torvalds BUG_ON(dev->reg_state != NETREG_RELEASED); 12391da177e4SLinus Torvalds 12400b815a1aSStephen Hemminger kfree(dev->ifalias); 12411da177e4SLinus Torvalds kfree((char *)dev - dev->padded); 12421da177e4SLinus Torvalds } 12431da177e4SLinus Torvalds 1244608b4b95SEric W. Biederman static const void *net_namespace(struct device *d) 1245608b4b95SEric W. Biederman { 1246608b4b95SEric W. Biederman struct net_device *dev; 1247608b4b95SEric W. Biederman dev = container_of(d, struct net_device, dev); 1248608b4b95SEric W. Biederman return dev_net(dev); 1249608b4b95SEric W. Biederman } 1250608b4b95SEric W. Biederman 12511da177e4SLinus Torvalds static struct class net_class = { 12521da177e4SLinus Torvalds .name = "net", 125343cb76d9SGreg Kroah-Hartman .dev_release = netdev_release, 12548b41d188SEric W. Biederman #ifdef CONFIG_SYSFS 125543cb76d9SGreg Kroah-Hartman .dev_attrs = net_class_attributes, 12568b41d188SEric W. Biederman #endif /* CONFIG_SYSFS */ 125743cb76d9SGreg Kroah-Hartman .dev_uevent = netdev_uevent, 1258608b4b95SEric W. Biederman .ns_type = &net_ns_type_operations, 1259608b4b95SEric W. Biederman .namespace = net_namespace, 12601da177e4SLinus Torvalds }; 12611da177e4SLinus Torvalds 12629093bbb2SStephen Hemminger /* Delete sysfs entries but hold kobject reference until after all 12639093bbb2SStephen Hemminger * netdev references are gone. 12649093bbb2SStephen Hemminger */ 12658b41d188SEric W. Biederman void netdev_unregister_kobject(struct net_device * net) 12661da177e4SLinus Torvalds { 12679093bbb2SStephen Hemminger struct device *dev = &(net->dev); 12689093bbb2SStephen Hemminger 12699093bbb2SStephen Hemminger kobject_get(&dev->kobj); 12703891845eSEric W. Biederman 12711d24eb48STom Herbert remove_queue_kobjects(net); 12720a9627f2STom Herbert 12739802c8e2SMing Lei pm_runtime_set_memalloc_noio(dev, false); 12749802c8e2SMing Lei 12759093bbb2SStephen Hemminger device_del(dev); 12761da177e4SLinus Torvalds } 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds /* Create sysfs entries for network device. */ 12798b41d188SEric W. Biederman int netdev_register_kobject(struct net_device *net) 12801da177e4SLinus Torvalds { 128143cb76d9SGreg Kroah-Hartman struct device *dev = &(net->dev); 1282a4dbd674SDavid Brownell const struct attribute_group **groups = net->sysfs_groups; 12830a9627f2STom Herbert int error = 0; 12841da177e4SLinus Torvalds 1285a1b3f594SEric W. Biederman device_initialize(dev); 128643cb76d9SGreg Kroah-Hartman dev->class = &net_class; 128743cb76d9SGreg Kroah-Hartman dev->platform_data = net; 128843cb76d9SGreg Kroah-Hartman dev->groups = groups; 12891da177e4SLinus Torvalds 1290a2205472SStephen Hemminger dev_set_name(dev, "%s", net->name); 12911da177e4SLinus Torvalds 12928b41d188SEric W. Biederman #ifdef CONFIG_SYSFS 12930c509a6cSEric W. Biederman /* Allow for a device specific group */ 12940c509a6cSEric W. Biederman if (*groups) 12950c509a6cSEric W. Biederman groups++; 12961da177e4SLinus Torvalds 12970c509a6cSEric W. Biederman *groups++ = &netstat_group; 129838c1a01cSJohannes Berg 129938c1a01cSJohannes Berg #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) 130038c1a01cSJohannes Berg if (net->ieee80211_ptr) 130138c1a01cSJohannes Berg *groups++ = &wireless_group; 130238c1a01cSJohannes Berg #if IS_ENABLED(CONFIG_WIRELESS_EXT) 130338c1a01cSJohannes Berg else if (net->wireless_handlers) 130438c1a01cSJohannes Berg *groups++ = &wireless_group; 130538c1a01cSJohannes Berg #endif 130638c1a01cSJohannes Berg #endif 13078b41d188SEric W. Biederman #endif /* CONFIG_SYSFS */ 13081da177e4SLinus Torvalds 13090a9627f2STom Herbert error = device_add(dev); 13100a9627f2STom Herbert if (error) 13110a9627f2STom Herbert return error; 13120a9627f2STom Herbert 13131d24eb48STom Herbert error = register_queue_kobjects(net); 13140a9627f2STom Herbert if (error) { 13150a9627f2STom Herbert device_del(dev); 13160a9627f2STom Herbert return error; 13170a9627f2STom Herbert } 13180a9627f2STom Herbert 13199802c8e2SMing Lei pm_runtime_set_memalloc_noio(dev, true); 13209802c8e2SMing Lei 13210a9627f2STom Herbert return error; 13221da177e4SLinus Torvalds } 13231da177e4SLinus Torvalds 1324b8a9787eSJay Vosburgh int netdev_class_create_file(struct class_attribute *class_attr) 1325b8a9787eSJay Vosburgh { 1326b8a9787eSJay Vosburgh return class_create_file(&net_class, class_attr); 1327b8a9787eSJay Vosburgh } 13289e34a5b5SEric Dumazet EXPORT_SYMBOL(netdev_class_create_file); 1329b8a9787eSJay Vosburgh 1330b8a9787eSJay Vosburgh void netdev_class_remove_file(struct class_attribute *class_attr) 1331b8a9787eSJay Vosburgh { 1332b8a9787eSJay Vosburgh class_remove_file(&net_class, class_attr); 1333b8a9787eSJay Vosburgh } 1334b8a9787eSJay Vosburgh EXPORT_SYMBOL(netdev_class_remove_file); 1335b8a9787eSJay Vosburgh 13368b41d188SEric W. Biederman int netdev_kobject_init(void) 13371da177e4SLinus Torvalds { 1338608b4b95SEric W. Biederman kobj_ns_type_register(&net_ns_type_operations); 13391da177e4SLinus Torvalds return class_register(&net_class); 13401da177e4SLinus Torvalds } 1341