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> 15aecbe01eSJiri Pirko #include <net/switchdev.h> 161da177e4SLinus Torvalds #include <linux/if_arp.h> 175a0e3ad6STejun Heo #include <linux/slab.h> 18608b4b95SEric W. Biederman #include <linux/nsproxy.h> 191da177e4SLinus Torvalds #include <net/sock.h> 20608b4b95SEric W. Biederman #include <net/net_namespace.h> 211da177e4SLinus Torvalds #include <linux/rtnetlink.h> 22fec5e652STom Herbert #include <linux/vmalloc.h> 23bc3b2d7fSPaul Gortmaker #include <linux/export.h> 24114cf580STom Herbert #include <linux/jiffies.h> 259802c8e2SMing Lei #include <linux/pm_runtime.h> 26aa836df9SFlorian Fainelli #include <linux/of.h> 271da177e4SLinus Torvalds 28342709efSPavel Emelyanov #include "net-sysfs.h" 29342709efSPavel Emelyanov 308b41d188SEric W. Biederman #ifdef CONFIG_SYSFS 311da177e4SLinus Torvalds static const char fmt_hex[] = "%#x\n"; 321da177e4SLinus Torvalds static const char fmt_dec[] = "%d\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 { 466b53dafeSWANG Cong struct net_device *ndev = to_net_dev(dev); 471da177e4SLinus Torvalds ssize_t ret = -EINVAL; 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds read_lock(&dev_base_lock); 506b53dafeSWANG Cong if (dev_isalive(ndev)) 516b53dafeSWANG Cong ret = (*format)(ndev, 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) \ 596b53dafeSWANG Cong static ssize_t format_##field(const struct net_device *dev, char *buf) \ 601da177e4SLinus Torvalds { \ 616b53dafeSWANG Cong return sprintf(buf, format_string, dev->field); \ 621da177e4SLinus Torvalds } \ 636be8aeefSGreg Kroah-Hartman static ssize_t field##_show(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); \ 676be8aeefSGreg Kroah-Hartman } \ 681da177e4SLinus Torvalds 696be8aeefSGreg Kroah-Hartman #define NETDEVICE_SHOW_RO(field, format_string) \ 706be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW(field, format_string); \ 716be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(field) 726be8aeefSGreg Kroah-Hartman 736be8aeefSGreg Kroah-Hartman #define NETDEVICE_SHOW_RW(field, format_string) \ 746be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW(field, format_string); \ 756be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RW(field) 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds /* use same locking and permission rules as SIF* ioctl's */ 7843cb76d9SGreg Kroah-Hartman static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, 791da177e4SLinus Torvalds const char *buf, size_t len, 801da177e4SLinus Torvalds int (*set)(struct net_device *, unsigned long)) 811da177e4SLinus Torvalds { 825e1fccc0SEric W. Biederman struct net_device *netdev = to_net_dev(dev); 835e1fccc0SEric W. Biederman struct net *net = dev_net(netdev); 841da177e4SLinus Torvalds unsigned long new; 851da177e4SLinus Torvalds int ret = -EINVAL; 861da177e4SLinus Torvalds 875e1fccc0SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 881da177e4SLinus Torvalds return -EPERM; 891da177e4SLinus Torvalds 90e1e420c7SShuah Khan ret = kstrtoul(buf, 0, &new); 91e1e420c7SShuah Khan if (ret) 921da177e4SLinus Torvalds goto err; 931da177e4SLinus Torvalds 945a5990d3SStephen Hemminger if (!rtnl_trylock()) 95336ca57cSEric W. Biederman return restart_syscall(); 965a5990d3SStephen Hemminger 975e1fccc0SEric W. Biederman if (dev_isalive(netdev)) { 985e1fccc0SEric W. Biederman if ((ret = (*set)(netdev, new)) == 0) 991da177e4SLinus Torvalds ret = len; 1001da177e4SLinus Torvalds } 1011da177e4SLinus Torvalds rtnl_unlock(); 1021da177e4SLinus Torvalds err: 1031da177e4SLinus Torvalds return ret; 1041da177e4SLinus Torvalds } 1051da177e4SLinus Torvalds 1066be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RO(dev_id, fmt_hex); 1073f85944fSAmir Vadai NETDEVICE_SHOW_RO(dev_port, fmt_dec); 1086be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec); 1096be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RO(addr_len, fmt_dec); 1106be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RO(ifindex, fmt_dec); 1116be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RO(type, fmt_dec); 1126be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RO(link_mode, fmt_dec); 1131da177e4SLinus Torvalds 114a54acb3aSNicolas Dichtel static ssize_t iflink_show(struct device *dev, struct device_attribute *attr, 115a54acb3aSNicolas Dichtel char *buf) 116a54acb3aSNicolas Dichtel { 117a54acb3aSNicolas Dichtel struct net_device *ndev = to_net_dev(dev); 118a54acb3aSNicolas Dichtel 119a54acb3aSNicolas Dichtel return sprintf(buf, fmt_dec, dev_get_iflink(ndev)); 120a54acb3aSNicolas Dichtel } 121a54acb3aSNicolas Dichtel static DEVICE_ATTR_RO(iflink); 122a54acb3aSNicolas Dichtel 1236b53dafeSWANG Cong static ssize_t format_name_assign_type(const struct net_device *dev, char *buf) 124685343fcSTom Gundersen { 1256b53dafeSWANG Cong return sprintf(buf, fmt_dec, dev->name_assign_type); 126685343fcSTom Gundersen } 127685343fcSTom Gundersen 128685343fcSTom Gundersen static ssize_t name_assign_type_show(struct device *dev, 129685343fcSTom Gundersen struct device_attribute *attr, 130685343fcSTom Gundersen char *buf) 131685343fcSTom Gundersen { 1326b53dafeSWANG Cong struct net_device *ndev = to_net_dev(dev); 133685343fcSTom Gundersen ssize_t ret = -EINVAL; 134685343fcSTom Gundersen 1356b53dafeSWANG Cong if (ndev->name_assign_type != NET_NAME_UNKNOWN) 136685343fcSTom Gundersen ret = netdev_show(dev, attr, buf, format_name_assign_type); 137685343fcSTom Gundersen 138685343fcSTom Gundersen return ret; 139685343fcSTom Gundersen } 140685343fcSTom Gundersen static DEVICE_ATTR_RO(name_assign_type); 141685343fcSTom Gundersen 1421da177e4SLinus Torvalds /* use same locking rules as GIFHWADDR ioctl's */ 1436be8aeefSGreg Kroah-Hartman static ssize_t address_show(struct device *dev, struct device_attribute *attr, 14443cb76d9SGreg Kroah-Hartman char *buf) 1451da177e4SLinus Torvalds { 1466b53dafeSWANG Cong struct net_device *ndev = to_net_dev(dev); 1471da177e4SLinus Torvalds ssize_t ret = -EINVAL; 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds read_lock(&dev_base_lock); 1506b53dafeSWANG Cong if (dev_isalive(ndev)) 1516b53dafeSWANG Cong ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len); 1521da177e4SLinus Torvalds read_unlock(&dev_base_lock); 1531da177e4SLinus Torvalds return ret; 1541da177e4SLinus Torvalds } 1556be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(address); 1561da177e4SLinus Torvalds 1576be8aeefSGreg Kroah-Hartman static ssize_t broadcast_show(struct device *dev, 15843cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 1591da177e4SLinus Torvalds { 1606b53dafeSWANG Cong struct net_device *ndev = to_net_dev(dev); 1616b53dafeSWANG Cong if (dev_isalive(ndev)) 1626b53dafeSWANG Cong return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len); 1631da177e4SLinus Torvalds return -EINVAL; 1641da177e4SLinus Torvalds } 1656be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(broadcast); 1661da177e4SLinus Torvalds 1676b53dafeSWANG Cong static int change_carrier(struct net_device *dev, unsigned long new_carrier) 168fdae0fdeSJiri Pirko { 1696b53dafeSWANG Cong if (!netif_running(dev)) 170fdae0fdeSJiri Pirko return -EINVAL; 1716b53dafeSWANG Cong return dev_change_carrier(dev, (bool) new_carrier); 172fdae0fdeSJiri Pirko } 173fdae0fdeSJiri Pirko 1746be8aeefSGreg Kroah-Hartman static ssize_t carrier_store(struct device *dev, struct device_attribute *attr, 175fdae0fdeSJiri Pirko const char *buf, size_t len) 176fdae0fdeSJiri Pirko { 177fdae0fdeSJiri Pirko return netdev_store(dev, attr, buf, len, change_carrier); 178fdae0fdeSJiri Pirko } 179fdae0fdeSJiri Pirko 1806be8aeefSGreg Kroah-Hartman static ssize_t carrier_show(struct device *dev, 18143cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 1821da177e4SLinus Torvalds { 1831da177e4SLinus Torvalds struct net_device *netdev = to_net_dev(dev); 1841da177e4SLinus Torvalds if (netif_running(netdev)) { 1851da177e4SLinus Torvalds return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds return -EINVAL; 1881da177e4SLinus Torvalds } 1896be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RW(carrier); 1901da177e4SLinus Torvalds 1916be8aeefSGreg Kroah-Hartman static ssize_t speed_show(struct device *dev, 192d519e17eSAndy Gospodarek struct device_attribute *attr, char *buf) 193d519e17eSAndy Gospodarek { 194d519e17eSAndy Gospodarek struct net_device *netdev = to_net_dev(dev); 195d519e17eSAndy Gospodarek int ret = -EINVAL; 196d519e17eSAndy Gospodarek 197d519e17eSAndy Gospodarek if (!rtnl_trylock()) 198d519e17eSAndy Gospodarek return restart_syscall(); 199d519e17eSAndy Gospodarek 2008ae6dacaSDavid Decotigny if (netif_running(netdev)) { 2017cad1bacSDavid Decotigny struct ethtool_link_ksettings cmd; 2027cad1bacSDavid Decotigny 2037cad1bacSDavid Decotigny if (!__ethtool_get_link_ksettings(netdev, &cmd)) 2047cad1bacSDavid Decotigny ret = sprintf(buf, fmt_dec, cmd.base.speed); 205d519e17eSAndy Gospodarek } 206d519e17eSAndy Gospodarek rtnl_unlock(); 207d519e17eSAndy Gospodarek return ret; 208d519e17eSAndy Gospodarek } 2096be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(speed); 210d519e17eSAndy Gospodarek 2116be8aeefSGreg Kroah-Hartman static ssize_t duplex_show(struct device *dev, 212d519e17eSAndy Gospodarek struct device_attribute *attr, char *buf) 213d519e17eSAndy Gospodarek { 214d519e17eSAndy Gospodarek struct net_device *netdev = to_net_dev(dev); 215d519e17eSAndy Gospodarek int ret = -EINVAL; 216d519e17eSAndy Gospodarek 217d519e17eSAndy Gospodarek if (!rtnl_trylock()) 218d519e17eSAndy Gospodarek return restart_syscall(); 219d519e17eSAndy Gospodarek 2208ae6dacaSDavid Decotigny if (netif_running(netdev)) { 2217cad1bacSDavid Decotigny struct ethtool_link_ksettings cmd; 2227cad1bacSDavid Decotigny 2237cad1bacSDavid Decotigny if (!__ethtool_get_link_ksettings(netdev, &cmd)) { 224c6c13965SNikolay Aleksandrov const char *duplex; 2257cad1bacSDavid Decotigny 2267cad1bacSDavid Decotigny switch (cmd.base.duplex) { 227c6c13965SNikolay Aleksandrov case DUPLEX_HALF: 228c6c13965SNikolay Aleksandrov duplex = "half"; 229c6c13965SNikolay Aleksandrov break; 230c6c13965SNikolay Aleksandrov case DUPLEX_FULL: 231c6c13965SNikolay Aleksandrov duplex = "full"; 232c6c13965SNikolay Aleksandrov break; 233c6c13965SNikolay Aleksandrov default: 234c6c13965SNikolay Aleksandrov duplex = "unknown"; 235c6c13965SNikolay Aleksandrov break; 236c6c13965SNikolay Aleksandrov } 237c6c13965SNikolay Aleksandrov ret = sprintf(buf, "%s\n", duplex); 238c6c13965SNikolay Aleksandrov } 239d519e17eSAndy Gospodarek } 240d519e17eSAndy Gospodarek rtnl_unlock(); 241d519e17eSAndy Gospodarek return ret; 242d519e17eSAndy Gospodarek } 2436be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(duplex); 244d519e17eSAndy Gospodarek 2456be8aeefSGreg Kroah-Hartman static ssize_t dormant_show(struct device *dev, 24643cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 247b00055aaSStefan Rompf { 248b00055aaSStefan Rompf struct net_device *netdev = to_net_dev(dev); 249b00055aaSStefan Rompf 250b00055aaSStefan Rompf if (netif_running(netdev)) 251b00055aaSStefan Rompf return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); 252b00055aaSStefan Rompf 253b00055aaSStefan Rompf return -EINVAL; 254b00055aaSStefan Rompf } 2556be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(dormant); 256b00055aaSStefan Rompf 25736cbd3dcSJan Engelhardt static const char *const operstates[] = { 258b00055aaSStefan Rompf "unknown", 259b00055aaSStefan Rompf "notpresent", /* currently unused */ 260b00055aaSStefan Rompf "down", 261b00055aaSStefan Rompf "lowerlayerdown", 262b00055aaSStefan Rompf "testing", /* currently unused */ 263b00055aaSStefan Rompf "dormant", 264b00055aaSStefan Rompf "up" 265b00055aaSStefan Rompf }; 266b00055aaSStefan Rompf 2676be8aeefSGreg Kroah-Hartman static ssize_t operstate_show(struct device *dev, 26843cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 269b00055aaSStefan Rompf { 270b00055aaSStefan Rompf const struct net_device *netdev = to_net_dev(dev); 271b00055aaSStefan Rompf unsigned char operstate; 272b00055aaSStefan Rompf 273b00055aaSStefan Rompf read_lock(&dev_base_lock); 274b00055aaSStefan Rompf operstate = netdev->operstate; 275b00055aaSStefan Rompf if (!netif_running(netdev)) 276b00055aaSStefan Rompf operstate = IF_OPER_DOWN; 277b00055aaSStefan Rompf read_unlock(&dev_base_lock); 278b00055aaSStefan Rompf 279e3a5cd9eSAdrian Bunk if (operstate >= ARRAY_SIZE(operstates)) 280b00055aaSStefan Rompf return -EINVAL; /* should not happen */ 281b00055aaSStefan Rompf 282b00055aaSStefan Rompf return sprintf(buf, "%s\n", operstates[operstate]); 283b00055aaSStefan Rompf } 2846be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(operstate); 285b00055aaSStefan Rompf 2862d3b479dSdavid decotigny static ssize_t carrier_changes_show(struct device *dev, 2872d3b479dSdavid decotigny struct device_attribute *attr, 2882d3b479dSdavid decotigny char *buf) 2892d3b479dSdavid decotigny { 2902d3b479dSdavid decotigny struct net_device *netdev = to_net_dev(dev); 2912d3b479dSdavid decotigny return sprintf(buf, fmt_dec, 2922d3b479dSdavid decotigny atomic_read(&netdev->carrier_changes)); 2932d3b479dSdavid decotigny } 2942d3b479dSdavid decotigny static DEVICE_ATTR_RO(carrier_changes); 2952d3b479dSdavid decotigny 2961da177e4SLinus Torvalds /* read-write attributes */ 2971da177e4SLinus Torvalds 2986b53dafeSWANG Cong static int change_mtu(struct net_device *dev, unsigned long new_mtu) 2991da177e4SLinus Torvalds { 3006b53dafeSWANG Cong return dev_set_mtu(dev, (int) new_mtu); 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds 3036be8aeefSGreg Kroah-Hartman static ssize_t mtu_store(struct device *dev, struct device_attribute *attr, 30443cb76d9SGreg Kroah-Hartman const char *buf, size_t len) 3051da177e4SLinus Torvalds { 30643cb76d9SGreg Kroah-Hartman return netdev_store(dev, attr, buf, len, change_mtu); 3071da177e4SLinus Torvalds } 3086be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RW(mtu, fmt_dec); 3091da177e4SLinus Torvalds 3106b53dafeSWANG Cong static int change_flags(struct net_device *dev, unsigned long new_flags) 3111da177e4SLinus Torvalds { 3126b53dafeSWANG Cong return dev_change_flags(dev, (unsigned int) new_flags); 3131da177e4SLinus Torvalds } 3141da177e4SLinus Torvalds 3156be8aeefSGreg Kroah-Hartman static ssize_t flags_store(struct device *dev, struct device_attribute *attr, 31643cb76d9SGreg Kroah-Hartman const char *buf, size_t len) 3171da177e4SLinus Torvalds { 31843cb76d9SGreg Kroah-Hartman return netdev_store(dev, attr, buf, len, change_flags); 3191da177e4SLinus Torvalds } 3206be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RW(flags, fmt_hex); 3211da177e4SLinus Torvalds 3226b53dafeSWANG Cong static int change_tx_queue_len(struct net_device *dev, unsigned long new_len) 3231da177e4SLinus Torvalds { 3246b53dafeSWANG Cong dev->tx_queue_len = new_len; 3251da177e4SLinus Torvalds return 0; 3261da177e4SLinus Torvalds } 3271da177e4SLinus Torvalds 3286be8aeefSGreg Kroah-Hartman static ssize_t tx_queue_len_store(struct device *dev, 32943cb76d9SGreg Kroah-Hartman struct device_attribute *attr, 33043cb76d9SGreg Kroah-Hartman const char *buf, size_t len) 3311da177e4SLinus Torvalds { 3325e1fccc0SEric W. Biederman if (!capable(CAP_NET_ADMIN)) 3335e1fccc0SEric W. Biederman return -EPERM; 3345e1fccc0SEric W. Biederman 33543cb76d9SGreg Kroah-Hartman return netdev_store(dev, attr, buf, len, change_tx_queue_len); 3361da177e4SLinus Torvalds } 3376be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RW(tx_queue_len, fmt_ulong); 3381da177e4SLinus Torvalds 3393b47d303SEric Dumazet static int change_gro_flush_timeout(struct net_device *dev, unsigned long val) 3403b47d303SEric Dumazet { 3413b47d303SEric Dumazet dev->gro_flush_timeout = val; 3423b47d303SEric Dumazet return 0; 3433b47d303SEric Dumazet } 3443b47d303SEric Dumazet 3453b47d303SEric Dumazet static ssize_t gro_flush_timeout_store(struct device *dev, 3463b47d303SEric Dumazet struct device_attribute *attr, 3473b47d303SEric Dumazet const char *buf, size_t len) 3483b47d303SEric Dumazet { 3493b47d303SEric Dumazet if (!capable(CAP_NET_ADMIN)) 3503b47d303SEric Dumazet return -EPERM; 3513b47d303SEric Dumazet 3523b47d303SEric Dumazet return netdev_store(dev, attr, buf, len, change_gro_flush_timeout); 3533b47d303SEric Dumazet } 3543b47d303SEric Dumazet NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong); 3553b47d303SEric Dumazet 3566be8aeefSGreg Kroah-Hartman static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr, 3570b815a1aSStephen Hemminger const char *buf, size_t len) 3580b815a1aSStephen Hemminger { 3590b815a1aSStephen Hemminger struct net_device *netdev = to_net_dev(dev); 3605e1fccc0SEric W. Biederman struct net *net = dev_net(netdev); 3610b815a1aSStephen Hemminger size_t count = len; 3620b815a1aSStephen Hemminger ssize_t ret; 3630b815a1aSStephen Hemminger 3645e1fccc0SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 3650b815a1aSStephen Hemminger return -EPERM; 3660b815a1aSStephen Hemminger 3670b815a1aSStephen Hemminger /* ignore trailing newline */ 3680b815a1aSStephen Hemminger if (len > 0 && buf[len - 1] == '\n') 3690b815a1aSStephen Hemminger --count; 3700b815a1aSStephen Hemminger 371336ca57cSEric W. Biederman if (!rtnl_trylock()) 372336ca57cSEric W. Biederman return restart_syscall(); 3730b815a1aSStephen Hemminger ret = dev_set_alias(netdev, buf, count); 3740b815a1aSStephen Hemminger rtnl_unlock(); 3750b815a1aSStephen Hemminger 3760b815a1aSStephen Hemminger return ret < 0 ? ret : len; 3770b815a1aSStephen Hemminger } 3780b815a1aSStephen Hemminger 3796be8aeefSGreg Kroah-Hartman static ssize_t ifalias_show(struct device *dev, 3800b815a1aSStephen Hemminger struct device_attribute *attr, char *buf) 3810b815a1aSStephen Hemminger { 3820b815a1aSStephen Hemminger const struct net_device *netdev = to_net_dev(dev); 3830b815a1aSStephen Hemminger ssize_t ret = 0; 3840b815a1aSStephen Hemminger 385336ca57cSEric W. Biederman if (!rtnl_trylock()) 386336ca57cSEric W. Biederman return restart_syscall(); 3870b815a1aSStephen Hemminger if (netdev->ifalias) 3880b815a1aSStephen Hemminger ret = sprintf(buf, "%s\n", netdev->ifalias); 3890b815a1aSStephen Hemminger rtnl_unlock(); 3900b815a1aSStephen Hemminger return ret; 3910b815a1aSStephen Hemminger } 3926be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RW(ifalias); 393a512b92bSVlad Dogaru 3946b53dafeSWANG Cong static int change_group(struct net_device *dev, unsigned long new_group) 395a512b92bSVlad Dogaru { 3966b53dafeSWANG Cong dev_set_group(dev, (int) new_group); 397a512b92bSVlad Dogaru return 0; 398a512b92bSVlad Dogaru } 399a512b92bSVlad Dogaru 4006be8aeefSGreg Kroah-Hartman static ssize_t group_store(struct device *dev, struct device_attribute *attr, 401a512b92bSVlad Dogaru const char *buf, size_t len) 402a512b92bSVlad Dogaru { 403a512b92bSVlad Dogaru return netdev_store(dev, attr, buf, len, change_group); 404a512b92bSVlad Dogaru } 4056be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW(group, fmt_dec); 4066be8aeefSGreg Kroah-Hartman static DEVICE_ATTR(netdev_group, S_IRUGO | S_IWUSR, group_show, group_store); 407a512b92bSVlad Dogaru 408d746d707SAnuradha Karuppiah static int change_proto_down(struct net_device *dev, unsigned long proto_down) 409d746d707SAnuradha Karuppiah { 410d746d707SAnuradha Karuppiah return dev_change_proto_down(dev, (bool) proto_down); 411d746d707SAnuradha Karuppiah } 412d746d707SAnuradha Karuppiah 413d746d707SAnuradha Karuppiah static ssize_t proto_down_store(struct device *dev, 414d746d707SAnuradha Karuppiah struct device_attribute *attr, 415d746d707SAnuradha Karuppiah const char *buf, size_t len) 416d746d707SAnuradha Karuppiah { 417d746d707SAnuradha Karuppiah return netdev_store(dev, attr, buf, len, change_proto_down); 418d746d707SAnuradha Karuppiah } 419d746d707SAnuradha Karuppiah NETDEVICE_SHOW_RW(proto_down, fmt_dec); 420d746d707SAnuradha Karuppiah 421cc998ff8SLinus Torvalds static ssize_t phys_port_id_show(struct device *dev, 422ff80e519SJiri Pirko struct device_attribute *attr, char *buf) 423ff80e519SJiri Pirko { 424ff80e519SJiri Pirko struct net_device *netdev = to_net_dev(dev); 425ff80e519SJiri Pirko ssize_t ret = -EINVAL; 426ff80e519SJiri Pirko 427ff80e519SJiri Pirko if (!rtnl_trylock()) 428ff80e519SJiri Pirko return restart_syscall(); 429ff80e519SJiri Pirko 430ff80e519SJiri Pirko if (dev_isalive(netdev)) { 43102637fceSJiri Pirko struct netdev_phys_item_id ppid; 432ff80e519SJiri Pirko 433ff80e519SJiri Pirko ret = dev_get_phys_port_id(netdev, &ppid); 434ff80e519SJiri Pirko if (!ret) 435ff80e519SJiri Pirko ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); 436ff80e519SJiri Pirko } 437ff80e519SJiri Pirko rtnl_unlock(); 438ff80e519SJiri Pirko 439ff80e519SJiri Pirko return ret; 440ff80e519SJiri Pirko } 441cc998ff8SLinus Torvalds static DEVICE_ATTR_RO(phys_port_id); 442ff80e519SJiri Pirko 443db24a904SDavid Ahern static ssize_t phys_port_name_show(struct device *dev, 444db24a904SDavid Ahern struct device_attribute *attr, char *buf) 445db24a904SDavid Ahern { 446db24a904SDavid Ahern struct net_device *netdev = to_net_dev(dev); 447db24a904SDavid Ahern ssize_t ret = -EINVAL; 448db24a904SDavid Ahern 449db24a904SDavid Ahern if (!rtnl_trylock()) 450db24a904SDavid Ahern return restart_syscall(); 451db24a904SDavid Ahern 452db24a904SDavid Ahern if (dev_isalive(netdev)) { 453db24a904SDavid Ahern char name[IFNAMSIZ]; 454db24a904SDavid Ahern 455db24a904SDavid Ahern ret = dev_get_phys_port_name(netdev, name, sizeof(name)); 456db24a904SDavid Ahern if (!ret) 457db24a904SDavid Ahern ret = sprintf(buf, "%s\n", name); 458db24a904SDavid Ahern } 459db24a904SDavid Ahern rtnl_unlock(); 460db24a904SDavid Ahern 461db24a904SDavid Ahern return ret; 462db24a904SDavid Ahern } 463db24a904SDavid Ahern static DEVICE_ATTR_RO(phys_port_name); 464db24a904SDavid Ahern 465aecbe01eSJiri Pirko static ssize_t phys_switch_id_show(struct device *dev, 466aecbe01eSJiri Pirko struct device_attribute *attr, char *buf) 467aecbe01eSJiri Pirko { 468aecbe01eSJiri Pirko struct net_device *netdev = to_net_dev(dev); 469aecbe01eSJiri Pirko ssize_t ret = -EINVAL; 470aecbe01eSJiri Pirko 471aecbe01eSJiri Pirko if (!rtnl_trylock()) 472aecbe01eSJiri Pirko return restart_syscall(); 473aecbe01eSJiri Pirko 474aecbe01eSJiri Pirko if (dev_isalive(netdev)) { 475f8e20a9fSScott Feldman struct switchdev_attr attr = { 4766ff64f6fSIdo Schimmel .orig_dev = netdev, 4771f868398SJiri Pirko .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, 478f8e20a9fSScott Feldman .flags = SWITCHDEV_F_NO_RECURSE, 479f8e20a9fSScott Feldman }; 480aecbe01eSJiri Pirko 481f8e20a9fSScott Feldman ret = switchdev_port_attr_get(netdev, &attr); 482aecbe01eSJiri Pirko if (!ret) 48342275bd8SScott Feldman ret = sprintf(buf, "%*phN\n", attr.u.ppid.id_len, 48442275bd8SScott Feldman attr.u.ppid.id); 485aecbe01eSJiri Pirko } 486aecbe01eSJiri Pirko rtnl_unlock(); 487aecbe01eSJiri Pirko 488aecbe01eSJiri Pirko return ret; 489aecbe01eSJiri Pirko } 490aecbe01eSJiri Pirko static DEVICE_ATTR_RO(phys_switch_id); 491aecbe01eSJiri Pirko 4926be8aeefSGreg Kroah-Hartman static struct attribute *net_class_attrs[] = { 4936be8aeefSGreg Kroah-Hartman &dev_attr_netdev_group.attr, 4946be8aeefSGreg Kroah-Hartman &dev_attr_type.attr, 4956be8aeefSGreg Kroah-Hartman &dev_attr_dev_id.attr, 4963f85944fSAmir Vadai &dev_attr_dev_port.attr, 4976be8aeefSGreg Kroah-Hartman &dev_attr_iflink.attr, 4986be8aeefSGreg Kroah-Hartman &dev_attr_ifindex.attr, 499685343fcSTom Gundersen &dev_attr_name_assign_type.attr, 5006be8aeefSGreg Kroah-Hartman &dev_attr_addr_assign_type.attr, 5016be8aeefSGreg Kroah-Hartman &dev_attr_addr_len.attr, 5026be8aeefSGreg Kroah-Hartman &dev_attr_link_mode.attr, 5036be8aeefSGreg Kroah-Hartman &dev_attr_address.attr, 5046be8aeefSGreg Kroah-Hartman &dev_attr_broadcast.attr, 5056be8aeefSGreg Kroah-Hartman &dev_attr_speed.attr, 5066be8aeefSGreg Kroah-Hartman &dev_attr_duplex.attr, 5076be8aeefSGreg Kroah-Hartman &dev_attr_dormant.attr, 5086be8aeefSGreg Kroah-Hartman &dev_attr_operstate.attr, 5092d3b479dSdavid decotigny &dev_attr_carrier_changes.attr, 5106be8aeefSGreg Kroah-Hartman &dev_attr_ifalias.attr, 5116be8aeefSGreg Kroah-Hartman &dev_attr_carrier.attr, 5126be8aeefSGreg Kroah-Hartman &dev_attr_mtu.attr, 5136be8aeefSGreg Kroah-Hartman &dev_attr_flags.attr, 5146be8aeefSGreg Kroah-Hartman &dev_attr_tx_queue_len.attr, 5153b47d303SEric Dumazet &dev_attr_gro_flush_timeout.attr, 516cc998ff8SLinus Torvalds &dev_attr_phys_port_id.attr, 517db24a904SDavid Ahern &dev_attr_phys_port_name.attr, 518aecbe01eSJiri Pirko &dev_attr_phys_switch_id.attr, 519d746d707SAnuradha Karuppiah &dev_attr_proto_down.attr, 5206be8aeefSGreg Kroah-Hartman NULL, 5211da177e4SLinus Torvalds }; 5226be8aeefSGreg Kroah-Hartman ATTRIBUTE_GROUPS(net_class); 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds /* Show a given an attribute in the statistics group */ 52543cb76d9SGreg Kroah-Hartman static ssize_t netstat_show(const struct device *d, 52643cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf, 5271da177e4SLinus Torvalds unsigned long offset) 5281da177e4SLinus Torvalds { 52943cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 5301da177e4SLinus Torvalds ssize_t ret = -EINVAL; 5311da177e4SLinus Torvalds 532be1f3c2cSBen Hutchings WARN_ON(offset > sizeof(struct rtnl_link_stats64) || 533be1f3c2cSBen Hutchings offset % sizeof(u64) != 0); 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds read_lock(&dev_base_lock); 53696e74088SPavel Emelyanov if (dev_isalive(dev)) { 53728172739SEric Dumazet struct rtnl_link_stats64 temp; 53828172739SEric Dumazet const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); 53928172739SEric Dumazet 540be1f3c2cSBen Hutchings ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); 54196e74088SPavel Emelyanov } 5421da177e4SLinus Torvalds read_unlock(&dev_base_lock); 5431da177e4SLinus Torvalds return ret; 5441da177e4SLinus Torvalds } 5451da177e4SLinus Torvalds 5461da177e4SLinus Torvalds /* generate a read-only statistics attribute */ 5471da177e4SLinus Torvalds #define NETSTAT_ENTRY(name) \ 5486be8aeefSGreg Kroah-Hartman static ssize_t name##_show(struct device *d, \ 54943cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) \ 5501da177e4SLinus Torvalds { \ 55143cb76d9SGreg Kroah-Hartman return netstat_show(d, attr, buf, \ 552be1f3c2cSBen Hutchings offsetof(struct rtnl_link_stats64, name)); \ 5531da177e4SLinus Torvalds } \ 5546be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(name) 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds NETSTAT_ENTRY(rx_packets); 5571da177e4SLinus Torvalds NETSTAT_ENTRY(tx_packets); 5581da177e4SLinus Torvalds NETSTAT_ENTRY(rx_bytes); 5591da177e4SLinus Torvalds NETSTAT_ENTRY(tx_bytes); 5601da177e4SLinus Torvalds NETSTAT_ENTRY(rx_errors); 5611da177e4SLinus Torvalds NETSTAT_ENTRY(tx_errors); 5621da177e4SLinus Torvalds NETSTAT_ENTRY(rx_dropped); 5631da177e4SLinus Torvalds NETSTAT_ENTRY(tx_dropped); 5641da177e4SLinus Torvalds NETSTAT_ENTRY(multicast); 5651da177e4SLinus Torvalds NETSTAT_ENTRY(collisions); 5661da177e4SLinus Torvalds NETSTAT_ENTRY(rx_length_errors); 5671da177e4SLinus Torvalds NETSTAT_ENTRY(rx_over_errors); 5681da177e4SLinus Torvalds NETSTAT_ENTRY(rx_crc_errors); 5691da177e4SLinus Torvalds NETSTAT_ENTRY(rx_frame_errors); 5701da177e4SLinus Torvalds NETSTAT_ENTRY(rx_fifo_errors); 5711da177e4SLinus Torvalds NETSTAT_ENTRY(rx_missed_errors); 5721da177e4SLinus Torvalds NETSTAT_ENTRY(tx_aborted_errors); 5731da177e4SLinus Torvalds NETSTAT_ENTRY(tx_carrier_errors); 5741da177e4SLinus Torvalds NETSTAT_ENTRY(tx_fifo_errors); 5751da177e4SLinus Torvalds NETSTAT_ENTRY(tx_heartbeat_errors); 5761da177e4SLinus Torvalds NETSTAT_ENTRY(tx_window_errors); 5771da177e4SLinus Torvalds NETSTAT_ENTRY(rx_compressed); 5781da177e4SLinus Torvalds NETSTAT_ENTRY(tx_compressed); 5796e7333d3SJarod Wilson NETSTAT_ENTRY(rx_nohandler); 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds static struct attribute *netstat_attrs[] = { 58243cb76d9SGreg Kroah-Hartman &dev_attr_rx_packets.attr, 58343cb76d9SGreg Kroah-Hartman &dev_attr_tx_packets.attr, 58443cb76d9SGreg Kroah-Hartman &dev_attr_rx_bytes.attr, 58543cb76d9SGreg Kroah-Hartman &dev_attr_tx_bytes.attr, 58643cb76d9SGreg Kroah-Hartman &dev_attr_rx_errors.attr, 58743cb76d9SGreg Kroah-Hartman &dev_attr_tx_errors.attr, 58843cb76d9SGreg Kroah-Hartman &dev_attr_rx_dropped.attr, 58943cb76d9SGreg Kroah-Hartman &dev_attr_tx_dropped.attr, 59043cb76d9SGreg Kroah-Hartman &dev_attr_multicast.attr, 59143cb76d9SGreg Kroah-Hartman &dev_attr_collisions.attr, 59243cb76d9SGreg Kroah-Hartman &dev_attr_rx_length_errors.attr, 59343cb76d9SGreg Kroah-Hartman &dev_attr_rx_over_errors.attr, 59443cb76d9SGreg Kroah-Hartman &dev_attr_rx_crc_errors.attr, 59543cb76d9SGreg Kroah-Hartman &dev_attr_rx_frame_errors.attr, 59643cb76d9SGreg Kroah-Hartman &dev_attr_rx_fifo_errors.attr, 59743cb76d9SGreg Kroah-Hartman &dev_attr_rx_missed_errors.attr, 59843cb76d9SGreg Kroah-Hartman &dev_attr_tx_aborted_errors.attr, 59943cb76d9SGreg Kroah-Hartman &dev_attr_tx_carrier_errors.attr, 60043cb76d9SGreg Kroah-Hartman &dev_attr_tx_fifo_errors.attr, 60143cb76d9SGreg Kroah-Hartman &dev_attr_tx_heartbeat_errors.attr, 60243cb76d9SGreg Kroah-Hartman &dev_attr_tx_window_errors.attr, 60343cb76d9SGreg Kroah-Hartman &dev_attr_rx_compressed.attr, 60443cb76d9SGreg Kroah-Hartman &dev_attr_tx_compressed.attr, 6056e7333d3SJarod Wilson &dev_attr_rx_nohandler.attr, 6061da177e4SLinus Torvalds NULL 6071da177e4SLinus Torvalds }; 6081da177e4SLinus Torvalds 6091da177e4SLinus Torvalds 6101da177e4SLinus Torvalds static struct attribute_group netstat_group = { 6111da177e4SLinus Torvalds .name = "statistics", 6121da177e4SLinus Torvalds .attrs = netstat_attrs, 6131da177e4SLinus Torvalds }; 61438c1a01cSJohannes Berg 61538c1a01cSJohannes Berg #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) 61638c1a01cSJohannes Berg static struct attribute *wireless_attrs[] = { 61738c1a01cSJohannes Berg NULL 61838c1a01cSJohannes Berg }; 61938c1a01cSJohannes Berg 62038c1a01cSJohannes Berg static struct attribute_group wireless_group = { 62138c1a01cSJohannes Berg .name = "wireless", 62238c1a01cSJohannes Berg .attrs = wireless_attrs, 62338c1a01cSJohannes Berg }; 62438c1a01cSJohannes Berg #endif 6256be8aeefSGreg Kroah-Hartman 6266be8aeefSGreg Kroah-Hartman #else /* CONFIG_SYSFS */ 6276be8aeefSGreg Kroah-Hartman #define net_class_groups NULL 628d6523ddfSEric W. Biederman #endif /* CONFIG_SYSFS */ 6291da177e4SLinus Torvalds 630a953be53SMichael Dalton #ifdef CONFIG_SYSFS 6310a9627f2STom Herbert #define to_rx_queue_attr(_attr) container_of(_attr, \ 6320a9627f2STom Herbert struct rx_queue_attribute, attr) 6330a9627f2STom Herbert 6340a9627f2STom Herbert #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) 6350a9627f2STom Herbert 6360a9627f2STom Herbert static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, 6370a9627f2STom Herbert char *buf) 6380a9627f2STom Herbert { 6390a9627f2STom Herbert struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); 6400a9627f2STom Herbert struct netdev_rx_queue *queue = to_rx_queue(kobj); 6410a9627f2STom Herbert 6420a9627f2STom Herbert if (!attribute->show) 6430a9627f2STom Herbert return -EIO; 6440a9627f2STom Herbert 6450a9627f2STom Herbert return attribute->show(queue, attribute, buf); 6460a9627f2STom Herbert } 6470a9627f2STom Herbert 6480a9627f2STom Herbert static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, 6490a9627f2STom Herbert const char *buf, size_t count) 6500a9627f2STom Herbert { 6510a9627f2STom Herbert struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); 6520a9627f2STom Herbert struct netdev_rx_queue *queue = to_rx_queue(kobj); 6530a9627f2STom Herbert 6540a9627f2STom Herbert if (!attribute->store) 6550a9627f2STom Herbert return -EIO; 6560a9627f2STom Herbert 6570a9627f2STom Herbert return attribute->store(queue, attribute, buf, count); 6580a9627f2STom Herbert } 6590a9627f2STom Herbert 660fa50d645Sstephen hemminger static const struct sysfs_ops rx_queue_sysfs_ops = { 6610a9627f2STom Herbert .show = rx_queue_attr_show, 6620a9627f2STom Herbert .store = rx_queue_attr_store, 6630a9627f2STom Herbert }; 6640a9627f2STom Herbert 665a953be53SMichael Dalton #ifdef CONFIG_RPS 6660a9627f2STom Herbert static ssize_t show_rps_map(struct netdev_rx_queue *queue, 6670a9627f2STom Herbert struct rx_queue_attribute *attribute, char *buf) 6680a9627f2STom Herbert { 6690a9627f2STom Herbert struct rps_map *map; 6700a9627f2STom Herbert cpumask_var_t mask; 671f0906827STejun Heo int i, len; 6720a9627f2STom Herbert 6730a9627f2STom Herbert if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) 6740a9627f2STom Herbert return -ENOMEM; 6750a9627f2STom Herbert 6760a9627f2STom Herbert rcu_read_lock(); 6770a9627f2STom Herbert map = rcu_dereference(queue->rps_map); 6780a9627f2STom Herbert if (map) 6790a9627f2STom Herbert for (i = 0; i < map->len; i++) 6800a9627f2STom Herbert cpumask_set_cpu(map->cpus[i], mask); 6810a9627f2STom Herbert 682f0906827STejun Heo len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); 6830a9627f2STom Herbert rcu_read_unlock(); 6840a9627f2STom Herbert free_cpumask_var(mask); 6850a9627f2STom Herbert 686f0906827STejun Heo return len < PAGE_SIZE ? len : -EINVAL; 6870a9627f2STom Herbert } 6880a9627f2STom Herbert 689f5acb907SEric Dumazet static ssize_t store_rps_map(struct netdev_rx_queue *queue, 6900a9627f2STom Herbert struct rx_queue_attribute *attribute, 6910a9627f2STom Herbert const char *buf, size_t len) 6920a9627f2STom Herbert { 6930a9627f2STom Herbert struct rps_map *old_map, *map; 6940a9627f2STom Herbert cpumask_var_t mask; 6950a9627f2STom Herbert int err, cpu, i; 696da65ad1fSSasha Levin static DEFINE_MUTEX(rps_map_mutex); 6970a9627f2STom Herbert 6980a9627f2STom Herbert if (!capable(CAP_NET_ADMIN)) 6990a9627f2STom Herbert return -EPERM; 7000a9627f2STom Herbert 7010a9627f2STom Herbert if (!alloc_cpumask_var(&mask, GFP_KERNEL)) 7020a9627f2STom Herbert return -ENOMEM; 7030a9627f2STom Herbert 7040a9627f2STom Herbert err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); 7050a9627f2STom Herbert if (err) { 7060a9627f2STom Herbert free_cpumask_var(mask); 7070a9627f2STom Herbert return err; 7080a9627f2STom Herbert } 7090a9627f2STom Herbert 71095c96174SEric Dumazet map = kzalloc(max_t(unsigned int, 7110a9627f2STom Herbert RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), 7120a9627f2STom Herbert GFP_KERNEL); 7130a9627f2STom Herbert if (!map) { 7140a9627f2STom Herbert free_cpumask_var(mask); 7150a9627f2STom Herbert return -ENOMEM; 7160a9627f2STom Herbert } 7170a9627f2STom Herbert 7180a9627f2STom Herbert i = 0; 7190a9627f2STom Herbert for_each_cpu_and(cpu, mask, cpu_online_mask) 7200a9627f2STom Herbert map->cpus[i++] = cpu; 7210a9627f2STom Herbert 7220a9627f2STom Herbert if (i) 7230a9627f2STom Herbert map->len = i; 7240a9627f2STom Herbert else { 7250a9627f2STom Herbert kfree(map); 7260a9627f2STom Herbert map = NULL; 7270a9627f2STom Herbert } 7280a9627f2STom Herbert 729da65ad1fSSasha Levin mutex_lock(&rps_map_mutex); 7306e3f7fafSEric Dumazet old_map = rcu_dereference_protected(queue->rps_map, 731da65ad1fSSasha Levin mutex_is_locked(&rps_map_mutex)); 7320a9627f2STom Herbert rcu_assign_pointer(queue->rps_map, map); 7330a9627f2STom Herbert 734adc9300eSEric Dumazet if (map) 735c5905afbSIngo Molnar static_key_slow_inc(&rps_needed); 73610e4ea75STom Herbert if (old_map) 737c5905afbSIngo Molnar static_key_slow_dec(&rps_needed); 73810e4ea75STom Herbert 739da65ad1fSSasha Levin mutex_unlock(&rps_map_mutex); 74010e4ea75STom Herbert 74110e4ea75STom Herbert if (old_map) 74210e4ea75STom Herbert kfree_rcu(old_map, rcu); 74310e4ea75STom Herbert 7440a9627f2STom Herbert free_cpumask_var(mask); 7450a9627f2STom Herbert return len; 7460a9627f2STom Herbert } 7470a9627f2STom Herbert 748fec5e652STom Herbert static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, 749fec5e652STom Herbert struct rx_queue_attribute *attr, 750fec5e652STom Herbert char *buf) 751fec5e652STom Herbert { 752fec5e652STom Herbert struct rps_dev_flow_table *flow_table; 75360b778ceSEric Dumazet unsigned long val = 0; 754fec5e652STom Herbert 755fec5e652STom Herbert rcu_read_lock(); 756fec5e652STom Herbert flow_table = rcu_dereference(queue->rps_flow_table); 757fec5e652STom Herbert if (flow_table) 75860b778ceSEric Dumazet val = (unsigned long)flow_table->mask + 1; 759fec5e652STom Herbert rcu_read_unlock(); 760fec5e652STom Herbert 76160b778ceSEric Dumazet return sprintf(buf, "%lu\n", val); 762fec5e652STom Herbert } 763fec5e652STom Herbert 764fec5e652STom Herbert static void rps_dev_flow_table_release(struct rcu_head *rcu) 765fec5e652STom Herbert { 766fec5e652STom Herbert struct rps_dev_flow_table *table = container_of(rcu, 767fec5e652STom Herbert struct rps_dev_flow_table, rcu); 768243198d0SAl Viro vfree(table); 769fec5e652STom Herbert } 770fec5e652STom Herbert 771f5acb907SEric Dumazet static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, 772fec5e652STom Herbert struct rx_queue_attribute *attr, 773fec5e652STom Herbert const char *buf, size_t len) 774fec5e652STom Herbert { 77560b778ceSEric Dumazet unsigned long mask, count; 776fec5e652STom Herbert struct rps_dev_flow_table *table, *old_table; 777fec5e652STom Herbert static DEFINE_SPINLOCK(rps_dev_flow_lock); 77860b778ceSEric Dumazet int rc; 779fec5e652STom Herbert 780fec5e652STom Herbert if (!capable(CAP_NET_ADMIN)) 781fec5e652STom Herbert return -EPERM; 782fec5e652STom Herbert 78360b778ceSEric Dumazet rc = kstrtoul(buf, 0, &count); 78460b778ceSEric Dumazet if (rc < 0) 78560b778ceSEric Dumazet return rc; 786fec5e652STom Herbert 787fec5e652STom Herbert if (count) { 78860b778ceSEric Dumazet mask = count - 1; 78960b778ceSEric Dumazet /* mask = roundup_pow_of_two(count) - 1; 79060b778ceSEric Dumazet * without overflows... 79160b778ceSEric Dumazet */ 79260b778ceSEric Dumazet while ((mask | (mask >> 1)) != mask) 79360b778ceSEric Dumazet mask |= (mask >> 1); 79460b778ceSEric Dumazet /* On 64 bit arches, must check mask fits in table->mask (u32), 7958e3bff96Sstephen hemminger * and on 32bit arches, must check 7968e3bff96Sstephen hemminger * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow. 79760b778ceSEric Dumazet */ 79860b778ceSEric Dumazet #if BITS_PER_LONG > 32 79960b778ceSEric Dumazet if (mask > (unsigned long)(u32)mask) 800a0a129f8SXi Wang return -EINVAL; 80160b778ceSEric Dumazet #else 80260b778ceSEric Dumazet if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) 803a0a129f8SXi Wang / sizeof(struct rps_dev_flow)) { 804fec5e652STom Herbert /* Enforce a limit to prevent overflow */ 805fec5e652STom Herbert return -EINVAL; 806fec5e652STom Herbert } 80760b778ceSEric Dumazet #endif 80860b778ceSEric Dumazet table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); 809fec5e652STom Herbert if (!table) 810fec5e652STom Herbert return -ENOMEM; 811fec5e652STom Herbert 81260b778ceSEric Dumazet table->mask = mask; 81360b778ceSEric Dumazet for (count = 0; count <= mask; count++) 81460b778ceSEric Dumazet table->flows[count].cpu = RPS_NO_CPU; 815fec5e652STom Herbert } else 816fec5e652STom Herbert table = NULL; 817fec5e652STom Herbert 818fec5e652STom Herbert spin_lock(&rps_dev_flow_lock); 8196e3f7fafSEric Dumazet old_table = rcu_dereference_protected(queue->rps_flow_table, 8206e3f7fafSEric Dumazet lockdep_is_held(&rps_dev_flow_lock)); 821fec5e652STom Herbert rcu_assign_pointer(queue->rps_flow_table, table); 822fec5e652STom Herbert spin_unlock(&rps_dev_flow_lock); 823fec5e652STom Herbert 824fec5e652STom Herbert if (old_table) 825fec5e652STom Herbert call_rcu(&old_table->rcu, rps_dev_flow_table_release); 826fec5e652STom Herbert 827fec5e652STom Herbert return len; 828fec5e652STom Herbert } 829fec5e652STom Herbert 8300a9627f2STom Herbert static struct rx_queue_attribute rps_cpus_attribute = 8310a9627f2STom Herbert __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); 8320a9627f2STom Herbert 833fec5e652STom Herbert 834fec5e652STom Herbert static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = 835fec5e652STom Herbert __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, 836fec5e652STom Herbert show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); 837a953be53SMichael Dalton #endif /* CONFIG_RPS */ 838fec5e652STom Herbert 8390a9627f2STom Herbert static struct attribute *rx_queue_default_attrs[] = { 840a953be53SMichael Dalton #ifdef CONFIG_RPS 8410a9627f2STom Herbert &rps_cpus_attribute.attr, 842fec5e652STom Herbert &rps_dev_flow_table_cnt_attribute.attr, 843a953be53SMichael Dalton #endif 8440a9627f2STom Herbert NULL 8450a9627f2STom Herbert }; 8460a9627f2STom Herbert 8470a9627f2STom Herbert static void rx_queue_release(struct kobject *kobj) 8480a9627f2STom Herbert { 8490a9627f2STom Herbert struct netdev_rx_queue *queue = to_rx_queue(kobj); 850a953be53SMichael Dalton #ifdef CONFIG_RPS 8516e3f7fafSEric Dumazet struct rps_map *map; 8526e3f7fafSEric Dumazet struct rps_dev_flow_table *flow_table; 8530a9627f2STom Herbert 854fec5e652STom Herbert 85533d480ceSEric Dumazet map = rcu_dereference_protected(queue->rps_map, 1); 8569ea19481SJohn Fastabend if (map) { 8579ea19481SJohn Fastabend RCU_INIT_POINTER(queue->rps_map, NULL); 858f6f80238SLai Jiangshan kfree_rcu(map, rcu); 8599ea19481SJohn Fastabend } 8606e3f7fafSEric Dumazet 86133d480ceSEric Dumazet flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); 8629ea19481SJohn Fastabend if (flow_table) { 8639ea19481SJohn Fastabend RCU_INIT_POINTER(queue->rps_flow_table, NULL); 8646e3f7fafSEric Dumazet call_rcu(&flow_table->rcu, rps_dev_flow_table_release); 8659ea19481SJohn Fastabend } 866a953be53SMichael Dalton #endif 8670a9627f2STom Herbert 8689ea19481SJohn Fastabend memset(kobj, 0, sizeof(*kobj)); 869fe822240STom Herbert dev_put(queue->dev); 8700a9627f2STom Herbert } 8710a9627f2STom Herbert 87282ef3d5dSWeilong Chen static const void *rx_queue_namespace(struct kobject *kobj) 87382ef3d5dSWeilong Chen { 87482ef3d5dSWeilong Chen struct netdev_rx_queue *queue = to_rx_queue(kobj); 87582ef3d5dSWeilong Chen struct device *dev = &queue->dev->dev; 87682ef3d5dSWeilong Chen const void *ns = NULL; 87782ef3d5dSWeilong Chen 87882ef3d5dSWeilong Chen if (dev->class && dev->class->ns_type) 87982ef3d5dSWeilong Chen ns = dev->class->namespace(dev); 88082ef3d5dSWeilong Chen 88182ef3d5dSWeilong Chen return ns; 88282ef3d5dSWeilong Chen } 88382ef3d5dSWeilong Chen 8840a9627f2STom Herbert static struct kobj_type rx_queue_ktype = { 8850a9627f2STom Herbert .sysfs_ops = &rx_queue_sysfs_ops, 8860a9627f2STom Herbert .release = rx_queue_release, 8870a9627f2STom Herbert .default_attrs = rx_queue_default_attrs, 88882ef3d5dSWeilong Chen .namespace = rx_queue_namespace 8890a9627f2STom Herbert }; 8900a9627f2STom Herbert 8916b53dafeSWANG Cong static int rx_queue_add_kobject(struct net_device *dev, int index) 8920a9627f2STom Herbert { 8936b53dafeSWANG Cong struct netdev_rx_queue *queue = dev->_rx + index; 8940a9627f2STom Herbert struct kobject *kobj = &queue->kobj; 8950a9627f2STom Herbert int error = 0; 8960a9627f2STom Herbert 8976b53dafeSWANG Cong kobj->kset = dev->queues_kset; 8980a9627f2STom Herbert error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, 8990a9627f2STom Herbert "rx-%u", index); 900a953be53SMichael Dalton if (error) 901a953be53SMichael Dalton goto exit; 902a953be53SMichael Dalton 9036b53dafeSWANG Cong if (dev->sysfs_rx_queue_group) { 9046b53dafeSWANG Cong error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group); 905a953be53SMichael Dalton if (error) 906a953be53SMichael Dalton goto exit; 9070a9627f2STom Herbert } 9080a9627f2STom Herbert 9090a9627f2STom Herbert kobject_uevent(kobj, KOBJ_ADD); 910fe822240STom Herbert dev_hold(queue->dev); 9110a9627f2STom Herbert 9120a9627f2STom Herbert return error; 913a953be53SMichael Dalton exit: 914a953be53SMichael Dalton kobject_put(kobj); 915a953be53SMichael Dalton return error; 9160a9627f2STom Herbert } 91780dd6eacSPaul Bolle #endif /* CONFIG_SYSFS */ 9180a9627f2STom Herbert 91962fe0b40SBen Hutchings int 9206b53dafeSWANG Cong net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) 9210a9627f2STom Herbert { 922a953be53SMichael Dalton #ifdef CONFIG_SYSFS 9230a9627f2STom Herbert int i; 9240a9627f2STom Herbert int error = 0; 9250a9627f2STom Herbert 926a953be53SMichael Dalton #ifndef CONFIG_RPS 9276b53dafeSWANG Cong if (!dev->sysfs_rx_queue_group) 928a953be53SMichael Dalton return 0; 929a953be53SMichael Dalton #endif 93062fe0b40SBen Hutchings for (i = old_num; i < new_num; i++) { 9316b53dafeSWANG Cong error = rx_queue_add_kobject(dev, i); 93262fe0b40SBen Hutchings if (error) { 93362fe0b40SBen Hutchings new_num = old_num; 9340a9627f2STom Herbert break; 9350a9627f2STom Herbert } 93662fe0b40SBen Hutchings } 9370a9627f2STom Herbert 938a953be53SMichael Dalton while (--i >= new_num) { 9396b53dafeSWANG Cong if (dev->sysfs_rx_queue_group) 9406b53dafeSWANG Cong sysfs_remove_group(&dev->_rx[i].kobj, 9416b53dafeSWANG Cong dev->sysfs_rx_queue_group); 9426b53dafeSWANG Cong kobject_put(&dev->_rx[i].kobj); 943a953be53SMichael Dalton } 9440a9627f2STom Herbert 9450a9627f2STom Herbert return error; 946bf264145STom Herbert #else 947bf264145STom Herbert return 0; 948bf264145STom Herbert #endif 9490a9627f2STom Herbert } 9500a9627f2STom Herbert 951ccf5ff69Sdavid decotigny #ifdef CONFIG_SYSFS 9521d24eb48STom Herbert /* 9531d24eb48STom Herbert * netdev_queue sysfs structures and functions. 9541d24eb48STom Herbert */ 9551d24eb48STom Herbert struct netdev_queue_attribute { 9561d24eb48STom Herbert struct attribute attr; 9571d24eb48STom Herbert ssize_t (*show)(struct netdev_queue *queue, 9581d24eb48STom Herbert struct netdev_queue_attribute *attr, char *buf); 9591d24eb48STom Herbert ssize_t (*store)(struct netdev_queue *queue, 9601d24eb48STom Herbert struct netdev_queue_attribute *attr, const char *buf, size_t len); 9611d24eb48STom Herbert }; 9621d24eb48STom Herbert #define to_netdev_queue_attr(_attr) container_of(_attr, \ 9631d24eb48STom Herbert struct netdev_queue_attribute, attr) 9641d24eb48STom Herbert 9651d24eb48STom Herbert #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) 9661d24eb48STom Herbert 9671d24eb48STom Herbert static ssize_t netdev_queue_attr_show(struct kobject *kobj, 9681d24eb48STom Herbert struct attribute *attr, char *buf) 96962fe0b40SBen Hutchings { 9701d24eb48STom Herbert struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); 9711d24eb48STom Herbert struct netdev_queue *queue = to_netdev_queue(kobj); 9721d24eb48STom Herbert 9731d24eb48STom Herbert if (!attribute->show) 9741d24eb48STom Herbert return -EIO; 9751d24eb48STom Herbert 9761d24eb48STom Herbert return attribute->show(queue, attribute, buf); 9771d24eb48STom Herbert } 9781d24eb48STom Herbert 9791d24eb48STom Herbert static ssize_t netdev_queue_attr_store(struct kobject *kobj, 9801d24eb48STom Herbert struct attribute *attr, 9811d24eb48STom Herbert const char *buf, size_t count) 9821d24eb48STom Herbert { 9831d24eb48STom Herbert struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); 9841d24eb48STom Herbert struct netdev_queue *queue = to_netdev_queue(kobj); 9851d24eb48STom Herbert 9861d24eb48STom Herbert if (!attribute->store) 9871d24eb48STom Herbert return -EIO; 9881d24eb48STom Herbert 9891d24eb48STom Herbert return attribute->store(queue, attribute, buf, count); 9901d24eb48STom Herbert } 9911d24eb48STom Herbert 9921d24eb48STom Herbert static const struct sysfs_ops netdev_queue_sysfs_ops = { 9931d24eb48STom Herbert .show = netdev_queue_attr_show, 9941d24eb48STom Herbert .store = netdev_queue_attr_store, 9951d24eb48STom Herbert }; 9961d24eb48STom Herbert 997ccf5ff69Sdavid decotigny static ssize_t show_trans_timeout(struct netdev_queue *queue, 998ccf5ff69Sdavid decotigny struct netdev_queue_attribute *attribute, 999ccf5ff69Sdavid decotigny char *buf) 1000ccf5ff69Sdavid decotigny { 1001ccf5ff69Sdavid decotigny unsigned long trans_timeout; 1002ccf5ff69Sdavid decotigny 1003ccf5ff69Sdavid decotigny spin_lock_irq(&queue->_xmit_lock); 1004ccf5ff69Sdavid decotigny trans_timeout = queue->trans_timeout; 1005ccf5ff69Sdavid decotigny spin_unlock_irq(&queue->_xmit_lock); 1006ccf5ff69Sdavid decotigny 1007ccf5ff69Sdavid decotigny return sprintf(buf, "%lu", trans_timeout); 1008ccf5ff69Sdavid decotigny } 1009ccf5ff69Sdavid decotigny 1010822b3b2eSJohn Fastabend #ifdef CONFIG_XPS 1011c4047f53SThadeu Lima de Souza Cascardo static unsigned int get_netdev_queue_index(struct netdev_queue *queue) 1012822b3b2eSJohn Fastabend { 1013822b3b2eSJohn Fastabend struct net_device *dev = queue->dev; 1014c4047f53SThadeu Lima de Souza Cascardo unsigned int i; 1015822b3b2eSJohn Fastabend 1016c4047f53SThadeu Lima de Souza Cascardo i = queue - dev->_tx; 1017822b3b2eSJohn Fastabend BUG_ON(i >= dev->num_tx_queues); 1018822b3b2eSJohn Fastabend 1019822b3b2eSJohn Fastabend return i; 1020822b3b2eSJohn Fastabend } 1021822b3b2eSJohn Fastabend 1022822b3b2eSJohn Fastabend static ssize_t show_tx_maxrate(struct netdev_queue *queue, 1023822b3b2eSJohn Fastabend struct netdev_queue_attribute *attribute, 1024822b3b2eSJohn Fastabend char *buf) 1025822b3b2eSJohn Fastabend { 1026822b3b2eSJohn Fastabend return sprintf(buf, "%lu\n", queue->tx_maxrate); 1027822b3b2eSJohn Fastabend } 1028822b3b2eSJohn Fastabend 1029822b3b2eSJohn Fastabend static ssize_t set_tx_maxrate(struct netdev_queue *queue, 1030822b3b2eSJohn Fastabend struct netdev_queue_attribute *attribute, 1031822b3b2eSJohn Fastabend const char *buf, size_t len) 1032822b3b2eSJohn Fastabend { 1033822b3b2eSJohn Fastabend struct net_device *dev = queue->dev; 1034822b3b2eSJohn Fastabend int err, index = get_netdev_queue_index(queue); 1035822b3b2eSJohn Fastabend u32 rate = 0; 1036822b3b2eSJohn Fastabend 1037822b3b2eSJohn Fastabend err = kstrtou32(buf, 10, &rate); 1038822b3b2eSJohn Fastabend if (err < 0) 1039822b3b2eSJohn Fastabend return err; 1040822b3b2eSJohn Fastabend 1041822b3b2eSJohn Fastabend if (!rtnl_trylock()) 1042822b3b2eSJohn Fastabend return restart_syscall(); 1043822b3b2eSJohn Fastabend 1044822b3b2eSJohn Fastabend err = -EOPNOTSUPP; 1045822b3b2eSJohn Fastabend if (dev->netdev_ops->ndo_set_tx_maxrate) 1046822b3b2eSJohn Fastabend err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate); 1047822b3b2eSJohn Fastabend 1048822b3b2eSJohn Fastabend rtnl_unlock(); 1049822b3b2eSJohn Fastabend if (!err) { 1050822b3b2eSJohn Fastabend queue->tx_maxrate = rate; 1051822b3b2eSJohn Fastabend return len; 1052822b3b2eSJohn Fastabend } 1053822b3b2eSJohn Fastabend return err; 1054822b3b2eSJohn Fastabend } 1055822b3b2eSJohn Fastabend 1056822b3b2eSJohn Fastabend static struct netdev_queue_attribute queue_tx_maxrate = 1057822b3b2eSJohn Fastabend __ATTR(tx_maxrate, S_IRUGO | S_IWUSR, 1058822b3b2eSJohn Fastabend show_tx_maxrate, set_tx_maxrate); 1059822b3b2eSJohn Fastabend #endif 1060822b3b2eSJohn Fastabend 1061ccf5ff69Sdavid decotigny static struct netdev_queue_attribute queue_trans_timeout = 1062ccf5ff69Sdavid decotigny __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL); 1063ccf5ff69Sdavid decotigny 1064114cf580STom Herbert #ifdef CONFIG_BQL 1065114cf580STom Herbert /* 1066114cf580STom Herbert * Byte queue limits sysfs structures and functions. 1067114cf580STom Herbert */ 1068114cf580STom Herbert static ssize_t bql_show(char *buf, unsigned int value) 1069114cf580STom Herbert { 1070114cf580STom Herbert return sprintf(buf, "%u\n", value); 1071114cf580STom Herbert } 1072114cf580STom Herbert 1073114cf580STom Herbert static ssize_t bql_set(const char *buf, const size_t count, 1074114cf580STom Herbert unsigned int *pvalue) 1075114cf580STom Herbert { 1076114cf580STom Herbert unsigned int value; 1077114cf580STom Herbert int err; 1078114cf580STom Herbert 1079114cf580STom Herbert if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) 1080114cf580STom Herbert value = DQL_MAX_LIMIT; 1081114cf580STom Herbert else { 1082114cf580STom Herbert err = kstrtouint(buf, 10, &value); 1083114cf580STom Herbert if (err < 0) 1084114cf580STom Herbert return err; 1085114cf580STom Herbert if (value > DQL_MAX_LIMIT) 1086114cf580STom Herbert return -EINVAL; 1087114cf580STom Herbert } 1088114cf580STom Herbert 1089114cf580STom Herbert *pvalue = value; 1090114cf580STom Herbert 1091114cf580STom Herbert return count; 1092114cf580STom Herbert } 1093114cf580STom Herbert 1094114cf580STom Herbert static ssize_t bql_show_hold_time(struct netdev_queue *queue, 1095114cf580STom Herbert struct netdev_queue_attribute *attr, 1096114cf580STom Herbert char *buf) 1097114cf580STom Herbert { 1098114cf580STom Herbert struct dql *dql = &queue->dql; 1099114cf580STom Herbert 1100114cf580STom Herbert return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); 1101114cf580STom Herbert } 1102114cf580STom Herbert 1103114cf580STom Herbert static ssize_t bql_set_hold_time(struct netdev_queue *queue, 1104114cf580STom Herbert struct netdev_queue_attribute *attribute, 1105114cf580STom Herbert const char *buf, size_t len) 1106114cf580STom Herbert { 1107114cf580STom Herbert struct dql *dql = &queue->dql; 110895c96174SEric Dumazet unsigned int value; 1109114cf580STom Herbert int err; 1110114cf580STom Herbert 1111114cf580STom Herbert err = kstrtouint(buf, 10, &value); 1112114cf580STom Herbert if (err < 0) 1113114cf580STom Herbert return err; 1114114cf580STom Herbert 1115114cf580STom Herbert dql->slack_hold_time = msecs_to_jiffies(value); 1116114cf580STom Herbert 1117114cf580STom Herbert return len; 1118114cf580STom Herbert } 1119114cf580STom Herbert 1120114cf580STom Herbert static struct netdev_queue_attribute bql_hold_time_attribute = 1121114cf580STom Herbert __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time, 1122114cf580STom Herbert bql_set_hold_time); 1123114cf580STom Herbert 1124114cf580STom Herbert static ssize_t bql_show_inflight(struct netdev_queue *queue, 1125114cf580STom Herbert struct netdev_queue_attribute *attr, 1126114cf580STom Herbert char *buf) 1127114cf580STom Herbert { 1128114cf580STom Herbert struct dql *dql = &queue->dql; 1129114cf580STom Herbert 1130114cf580STom Herbert return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); 1131114cf580STom Herbert } 1132114cf580STom Herbert 1133114cf580STom Herbert static struct netdev_queue_attribute bql_inflight_attribute = 1134795d9a25SHiroaki SHIMODA __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL); 1135114cf580STom Herbert 1136114cf580STom Herbert #define BQL_ATTR(NAME, FIELD) \ 1137114cf580STom Herbert static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ 1138114cf580STom Herbert struct netdev_queue_attribute *attr, \ 1139114cf580STom Herbert char *buf) \ 1140114cf580STom Herbert { \ 1141114cf580STom Herbert return bql_show(buf, queue->dql.FIELD); \ 1142114cf580STom Herbert } \ 1143114cf580STom Herbert \ 1144114cf580STom Herbert static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ 1145114cf580STom Herbert struct netdev_queue_attribute *attr, \ 1146114cf580STom Herbert const char *buf, size_t len) \ 1147114cf580STom Herbert { \ 1148114cf580STom Herbert return bql_set(buf, len, &queue->dql.FIELD); \ 1149114cf580STom Herbert } \ 1150114cf580STom Herbert \ 1151114cf580STom Herbert static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \ 1152114cf580STom Herbert __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \ 1153114cf580STom Herbert bql_set_ ## NAME); 1154114cf580STom Herbert 1155114cf580STom Herbert BQL_ATTR(limit, limit) 1156114cf580STom Herbert BQL_ATTR(limit_max, max_limit) 1157114cf580STom Herbert BQL_ATTR(limit_min, min_limit) 1158114cf580STom Herbert 1159114cf580STom Herbert static struct attribute *dql_attrs[] = { 1160114cf580STom Herbert &bql_limit_attribute.attr, 1161114cf580STom Herbert &bql_limit_max_attribute.attr, 1162114cf580STom Herbert &bql_limit_min_attribute.attr, 1163114cf580STom Herbert &bql_hold_time_attribute.attr, 1164114cf580STom Herbert &bql_inflight_attribute.attr, 1165114cf580STom Herbert NULL 1166114cf580STom Herbert }; 1167114cf580STom Herbert 1168114cf580STom Herbert static struct attribute_group dql_group = { 1169114cf580STom Herbert .name = "byte_queue_limits", 1170114cf580STom Herbert .attrs = dql_attrs, 1171114cf580STom Herbert }; 1172114cf580STom Herbert #endif /* CONFIG_BQL */ 1173114cf580STom Herbert 1174ccf5ff69Sdavid decotigny #ifdef CONFIG_XPS 11751d24eb48STom Herbert static ssize_t show_xps_map(struct netdev_queue *queue, 11761d24eb48STom Herbert struct netdev_queue_attribute *attribute, char *buf) 11771d24eb48STom Herbert { 11781d24eb48STom Herbert struct net_device *dev = queue->dev; 11791d24eb48STom Herbert struct xps_dev_maps *dev_maps; 11801d24eb48STom Herbert cpumask_var_t mask; 11811d24eb48STom Herbert unsigned long index; 1182f0906827STejun Heo int i, len; 11831d24eb48STom Herbert 11841d24eb48STom Herbert if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) 11851d24eb48STom Herbert return -ENOMEM; 11861d24eb48STom Herbert 11871d24eb48STom Herbert index = get_netdev_queue_index(queue); 11881d24eb48STom Herbert 11891d24eb48STom Herbert rcu_read_lock(); 11901d24eb48STom Herbert dev_maps = rcu_dereference(dev->xps_maps); 11911d24eb48STom Herbert if (dev_maps) { 11921d24eb48STom Herbert for_each_possible_cpu(i) { 11931d24eb48STom Herbert struct xps_map *map = 11941d24eb48STom Herbert rcu_dereference(dev_maps->cpu_map[i]); 11951d24eb48STom Herbert if (map) { 11961d24eb48STom Herbert int j; 11971d24eb48STom Herbert for (j = 0; j < map->len; j++) { 11981d24eb48STom Herbert if (map->queues[j] == index) { 11991d24eb48STom Herbert cpumask_set_cpu(i, mask); 12001d24eb48STom Herbert break; 12011d24eb48STom Herbert } 12021d24eb48STom Herbert } 12031d24eb48STom Herbert } 12041d24eb48STom Herbert } 12051d24eb48STom Herbert } 12061d24eb48STom Herbert rcu_read_unlock(); 12071d24eb48STom Herbert 1208f0906827STejun Heo len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); 12091d24eb48STom Herbert free_cpumask_var(mask); 1210f0906827STejun Heo return len < PAGE_SIZE ? len : -EINVAL; 12111d24eb48STom Herbert } 12121d24eb48STom Herbert 12131d24eb48STom Herbert static ssize_t store_xps_map(struct netdev_queue *queue, 12141d24eb48STom Herbert struct netdev_queue_attribute *attribute, 12151d24eb48STom Herbert const char *buf, size_t len) 12161d24eb48STom Herbert { 12171d24eb48STom Herbert struct net_device *dev = queue->dev; 12181d24eb48STom Herbert unsigned long index; 1219537c00deSAlexander Duyck cpumask_var_t mask; 1220537c00deSAlexander Duyck int err; 12211d24eb48STom Herbert 12221d24eb48STom Herbert if (!capable(CAP_NET_ADMIN)) 12231d24eb48STom Herbert return -EPERM; 12241d24eb48STom Herbert 12251d24eb48STom Herbert if (!alloc_cpumask_var(&mask, GFP_KERNEL)) 12261d24eb48STom Herbert return -ENOMEM; 12271d24eb48STom Herbert 12281d24eb48STom Herbert index = get_netdev_queue_index(queue); 12291d24eb48STom Herbert 12301d24eb48STom Herbert err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); 12311d24eb48STom Herbert if (err) { 12321d24eb48STom Herbert free_cpumask_var(mask); 12331d24eb48STom Herbert return err; 12341d24eb48STom Herbert } 12351d24eb48STom Herbert 1236537c00deSAlexander Duyck err = netif_set_xps_queue(dev, mask, index); 12371d24eb48STom Herbert 12381d24eb48STom Herbert free_cpumask_var(mask); 12391d24eb48STom Herbert 1240537c00deSAlexander Duyck return err ? : len; 12411d24eb48STom Herbert } 12421d24eb48STom Herbert 12431d24eb48STom Herbert static struct netdev_queue_attribute xps_cpus_attribute = 12441d24eb48STom Herbert __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); 1245ccf5ff69Sdavid decotigny #endif /* CONFIG_XPS */ 12461d24eb48STom Herbert 12471d24eb48STom Herbert static struct attribute *netdev_queue_default_attrs[] = { 1248ccf5ff69Sdavid decotigny &queue_trans_timeout.attr, 1249ccf5ff69Sdavid decotigny #ifdef CONFIG_XPS 12501d24eb48STom Herbert &xps_cpus_attribute.attr, 1251822b3b2eSJohn Fastabend &queue_tx_maxrate.attr, 1252ccf5ff69Sdavid decotigny #endif 12531d24eb48STom Herbert NULL 12541d24eb48STom Herbert }; 12551d24eb48STom Herbert 12561d24eb48STom Herbert static void netdev_queue_release(struct kobject *kobj) 12571d24eb48STom Herbert { 12581d24eb48STom Herbert struct netdev_queue *queue = to_netdev_queue(kobj); 12591d24eb48STom Herbert 12601d24eb48STom Herbert memset(kobj, 0, sizeof(*kobj)); 12611d24eb48STom Herbert dev_put(queue->dev); 12621d24eb48STom Herbert } 12631d24eb48STom Herbert 126482ef3d5dSWeilong Chen static const void *netdev_queue_namespace(struct kobject *kobj) 126582ef3d5dSWeilong Chen { 126682ef3d5dSWeilong Chen struct netdev_queue *queue = to_netdev_queue(kobj); 126782ef3d5dSWeilong Chen struct device *dev = &queue->dev->dev; 126882ef3d5dSWeilong Chen const void *ns = NULL; 126982ef3d5dSWeilong Chen 127082ef3d5dSWeilong Chen if (dev->class && dev->class->ns_type) 127182ef3d5dSWeilong Chen ns = dev->class->namespace(dev); 127282ef3d5dSWeilong Chen 127382ef3d5dSWeilong Chen return ns; 127482ef3d5dSWeilong Chen } 127582ef3d5dSWeilong Chen 12761d24eb48STom Herbert static struct kobj_type netdev_queue_ktype = { 12771d24eb48STom Herbert .sysfs_ops = &netdev_queue_sysfs_ops, 12781d24eb48STom Herbert .release = netdev_queue_release, 12791d24eb48STom Herbert .default_attrs = netdev_queue_default_attrs, 128082ef3d5dSWeilong Chen .namespace = netdev_queue_namespace, 12811d24eb48STom Herbert }; 12821d24eb48STom Herbert 12836b53dafeSWANG Cong static int netdev_queue_add_kobject(struct net_device *dev, int index) 12841d24eb48STom Herbert { 12856b53dafeSWANG Cong struct netdev_queue *queue = dev->_tx + index; 12861d24eb48STom Herbert struct kobject *kobj = &queue->kobj; 12871d24eb48STom Herbert int error = 0; 12881d24eb48STom Herbert 12896b53dafeSWANG Cong kobj->kset = dev->queues_kset; 12901d24eb48STom Herbert error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, 12911d24eb48STom Herbert "tx-%u", index); 1292114cf580STom Herbert if (error) 1293114cf580STom Herbert goto exit; 1294114cf580STom Herbert 1295114cf580STom Herbert #ifdef CONFIG_BQL 1296114cf580STom Herbert error = sysfs_create_group(kobj, &dql_group); 1297114cf580STom Herbert if (error) 1298114cf580STom Herbert goto exit; 1299114cf580STom Herbert #endif 13001d24eb48STom Herbert 13011d24eb48STom Herbert kobject_uevent(kobj, KOBJ_ADD); 13021d24eb48STom Herbert dev_hold(queue->dev); 13031d24eb48STom Herbert 1304114cf580STom Herbert return 0; 1305114cf580STom Herbert exit: 1306114cf580STom Herbert kobject_put(kobj); 13071d24eb48STom Herbert return error; 13081d24eb48STom Herbert } 1309ccf5ff69Sdavid decotigny #endif /* CONFIG_SYSFS */ 13101d24eb48STom Herbert 13111d24eb48STom Herbert int 13126b53dafeSWANG Cong netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) 13131d24eb48STom Herbert { 1314ccf5ff69Sdavid decotigny #ifdef CONFIG_SYSFS 13151d24eb48STom Herbert int i; 13161d24eb48STom Herbert int error = 0; 13171d24eb48STom Herbert 13181d24eb48STom Herbert for (i = old_num; i < new_num; i++) { 13196b53dafeSWANG Cong error = netdev_queue_add_kobject(dev, i); 13201d24eb48STom Herbert if (error) { 13211d24eb48STom Herbert new_num = old_num; 13221d24eb48STom Herbert break; 13231d24eb48STom Herbert } 13241d24eb48STom Herbert } 13251d24eb48STom Herbert 1326114cf580STom Herbert while (--i >= new_num) { 13276b53dafeSWANG Cong struct netdev_queue *queue = dev->_tx + i; 1328114cf580STom Herbert 1329114cf580STom Herbert #ifdef CONFIG_BQL 1330114cf580STom Herbert sysfs_remove_group(&queue->kobj, &dql_group); 1331114cf580STom Herbert #endif 1332114cf580STom Herbert kobject_put(&queue->kobj); 1333114cf580STom Herbert } 13341d24eb48STom Herbert 13351d24eb48STom Herbert return error; 1336bf264145STom Herbert #else 1337bf264145STom Herbert return 0; 1338ccf5ff69Sdavid decotigny #endif /* CONFIG_SYSFS */ 13391d24eb48STom Herbert } 13401d24eb48STom Herbert 13416b53dafeSWANG Cong static int register_queue_kobjects(struct net_device *dev) 13421d24eb48STom Herbert { 1343bf264145STom Herbert int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; 13441d24eb48STom Herbert 1345ccf5ff69Sdavid decotigny #ifdef CONFIG_SYSFS 13466b53dafeSWANG Cong dev->queues_kset = kset_create_and_add("queues", 13476b53dafeSWANG Cong NULL, &dev->dev.kobj); 13486b53dafeSWANG Cong if (!dev->queues_kset) 134962fe0b40SBen Hutchings return -ENOMEM; 13506b53dafeSWANG Cong real_rx = dev->real_num_rx_queues; 1351bf264145STom Herbert #endif 13526b53dafeSWANG Cong real_tx = dev->real_num_tx_queues; 1353bf264145STom Herbert 13546b53dafeSWANG Cong error = net_rx_queue_update_kobjects(dev, 0, real_rx); 13551d24eb48STom Herbert if (error) 13561d24eb48STom Herbert goto error; 1357bf264145STom Herbert rxq = real_rx; 13581d24eb48STom Herbert 13596b53dafeSWANG Cong error = netdev_queue_update_kobjects(dev, 0, real_tx); 13601d24eb48STom Herbert if (error) 13611d24eb48STom Herbert goto error; 1362bf264145STom Herbert txq = real_tx; 13631d24eb48STom Herbert 13641d24eb48STom Herbert return 0; 13651d24eb48STom Herbert 13661d24eb48STom Herbert error: 13676b53dafeSWANG Cong netdev_queue_update_kobjects(dev, txq, 0); 13686b53dafeSWANG Cong net_rx_queue_update_kobjects(dev, rxq, 0); 13691d24eb48STom Herbert return error; 137062fe0b40SBen Hutchings } 137162fe0b40SBen Hutchings 13726b53dafeSWANG Cong static void remove_queue_kobjects(struct net_device *dev) 13730a9627f2STom Herbert { 1374bf264145STom Herbert int real_rx = 0, real_tx = 0; 1375bf264145STom Herbert 1376a953be53SMichael Dalton #ifdef CONFIG_SYSFS 13776b53dafeSWANG Cong real_rx = dev->real_num_rx_queues; 1378bf264145STom Herbert #endif 13796b53dafeSWANG Cong real_tx = dev->real_num_tx_queues; 1380bf264145STom Herbert 13816b53dafeSWANG Cong net_rx_queue_update_kobjects(dev, real_rx, 0); 13826b53dafeSWANG Cong netdev_queue_update_kobjects(dev, real_tx, 0); 1383ccf5ff69Sdavid decotigny #ifdef CONFIG_SYSFS 13846b53dafeSWANG Cong kset_unregister(dev->queues_kset); 1385bf264145STom Herbert #endif 13860a9627f2STom Herbert } 1387608b4b95SEric W. Biederman 13887dc5dbc8SEric W. Biederman static bool net_current_may_mount(void) 13897dc5dbc8SEric W. Biederman { 13907dc5dbc8SEric W. Biederman struct net *net = current->nsproxy->net_ns; 13917dc5dbc8SEric W. Biederman 13927dc5dbc8SEric W. Biederman return ns_capable(net->user_ns, CAP_SYS_ADMIN); 13937dc5dbc8SEric W. Biederman } 13947dc5dbc8SEric W. Biederman 1395a685e089SAl Viro static void *net_grab_current_ns(void) 1396608b4b95SEric W. Biederman { 1397a685e089SAl Viro struct net *ns = current->nsproxy->net_ns; 1398a685e089SAl Viro #ifdef CONFIG_NET_NS 1399a685e089SAl Viro if (ns) 1400a685e089SAl Viro atomic_inc(&ns->passive); 1401a685e089SAl Viro #endif 1402a685e089SAl Viro return ns; 1403608b4b95SEric W. Biederman } 1404608b4b95SEric W. Biederman 1405608b4b95SEric W. Biederman static const void *net_initial_ns(void) 1406608b4b95SEric W. Biederman { 1407608b4b95SEric W. Biederman return &init_net; 1408608b4b95SEric W. Biederman } 1409608b4b95SEric W. Biederman 1410608b4b95SEric W. Biederman static const void *net_netlink_ns(struct sock *sk) 1411608b4b95SEric W. Biederman { 1412608b4b95SEric W. Biederman return sock_net(sk); 1413608b4b95SEric W. Biederman } 1414608b4b95SEric W. Biederman 141504600794SJohannes Berg struct kobj_ns_type_operations net_ns_type_operations = { 1416608b4b95SEric W. Biederman .type = KOBJ_NS_TYPE_NET, 14177dc5dbc8SEric W. Biederman .current_may_mount = net_current_may_mount, 1418a685e089SAl Viro .grab_current_ns = net_grab_current_ns, 1419608b4b95SEric W. Biederman .netlink_ns = net_netlink_ns, 1420608b4b95SEric W. Biederman .initial_ns = net_initial_ns, 1421a685e089SAl Viro .drop_ns = net_drop_ns, 1422608b4b95SEric W. Biederman }; 142304600794SJohannes Berg EXPORT_SYMBOL_GPL(net_ns_type_operations); 1424608b4b95SEric W. Biederman 14257eff2e7aSKay Sievers static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) 14261da177e4SLinus Torvalds { 142743cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 14287eff2e7aSKay Sievers int retval; 14291da177e4SLinus Torvalds 1430312c004dSKay Sievers /* pass interface to uevent. */ 14317eff2e7aSKay Sievers retval = add_uevent_var(env, "INTERFACE=%s", dev->name); 1432bf62456eSEric Rannaud if (retval) 1433bf62456eSEric Rannaud goto exit; 14341da177e4SLinus Torvalds 1435ca2f37dbSJean Tourrilhes /* pass ifindex to uevent. 1436ca2f37dbSJean Tourrilhes * ifindex is useful as it won't change (interface name may change) 1437ca2f37dbSJean Tourrilhes * and is what RtNetlink uses natively. */ 14387eff2e7aSKay Sievers retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); 1439ca2f37dbSJean Tourrilhes 1440bf62456eSEric Rannaud exit: 1441bf62456eSEric Rannaud return retval; 14421da177e4SLinus Torvalds } 14431da177e4SLinus Torvalds 14441da177e4SLinus Torvalds /* 14451da177e4SLinus Torvalds * netdev_release -- destroy and free a dead device. 144643cb76d9SGreg Kroah-Hartman * Called when last reference to device kobject is gone. 14471da177e4SLinus Torvalds */ 144843cb76d9SGreg Kroah-Hartman static void netdev_release(struct device *d) 14491da177e4SLinus Torvalds { 145043cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds BUG_ON(dev->reg_state != NETREG_RELEASED); 14531da177e4SLinus Torvalds 14540b815a1aSStephen Hemminger kfree(dev->ifalias); 145574d332c1SEric Dumazet netdev_freemem(dev); 14561da177e4SLinus Torvalds } 14571da177e4SLinus Torvalds 1458608b4b95SEric W. Biederman static const void *net_namespace(struct device *d) 1459608b4b95SEric W. Biederman { 14605c29482dSGeliang Tang struct net_device *dev = to_net_dev(d); 14615c29482dSGeliang Tang 1462608b4b95SEric W. Biederman return dev_net(dev); 1463608b4b95SEric W. Biederman } 1464608b4b95SEric W. Biederman 14651da177e4SLinus Torvalds static struct class net_class = { 14661da177e4SLinus Torvalds .name = "net", 146743cb76d9SGreg Kroah-Hartman .dev_release = netdev_release, 14686be8aeefSGreg Kroah-Hartman .dev_groups = net_class_groups, 146943cb76d9SGreg Kroah-Hartman .dev_uevent = netdev_uevent, 1470608b4b95SEric W. Biederman .ns_type = &net_ns_type_operations, 1471608b4b95SEric W. Biederman .namespace = net_namespace, 14721da177e4SLinus Torvalds }; 14731da177e4SLinus Torvalds 1474aa836df9SFlorian Fainelli #ifdef CONFIG_OF_NET 1475aa836df9SFlorian Fainelli static int of_dev_node_match(struct device *dev, const void *data) 1476aa836df9SFlorian Fainelli { 1477aa836df9SFlorian Fainelli int ret = 0; 1478aa836df9SFlorian Fainelli 1479aa836df9SFlorian Fainelli if (dev->parent) 1480aa836df9SFlorian Fainelli ret = dev->parent->of_node == data; 1481aa836df9SFlorian Fainelli 1482aa836df9SFlorian Fainelli return ret == 0 ? dev->of_node == data : ret; 1483aa836df9SFlorian Fainelli } 1484aa836df9SFlorian Fainelli 14859861f720SRussell King /* 14869861f720SRussell King * of_find_net_device_by_node - lookup the net device for the device node 14879861f720SRussell King * @np: OF device node 14889861f720SRussell King * 14899861f720SRussell King * Looks up the net_device structure corresponding with the device node. 14909861f720SRussell King * If successful, returns a pointer to the net_device with the embedded 14919861f720SRussell King * struct device refcount incremented by one, or NULL on failure. The 14929861f720SRussell King * refcount must be dropped when done with the net_device. 14939861f720SRussell King */ 1494aa836df9SFlorian Fainelli struct net_device *of_find_net_device_by_node(struct device_node *np) 1495aa836df9SFlorian Fainelli { 1496aa836df9SFlorian Fainelli struct device *dev; 1497aa836df9SFlorian Fainelli 1498aa836df9SFlorian Fainelli dev = class_find_device(&net_class, NULL, np, of_dev_node_match); 1499aa836df9SFlorian Fainelli if (!dev) 1500aa836df9SFlorian Fainelli return NULL; 1501aa836df9SFlorian Fainelli 1502aa836df9SFlorian Fainelli return to_net_dev(dev); 1503aa836df9SFlorian Fainelli } 1504aa836df9SFlorian Fainelli EXPORT_SYMBOL(of_find_net_device_by_node); 1505aa836df9SFlorian Fainelli #endif 1506aa836df9SFlorian Fainelli 15079093bbb2SStephen Hemminger /* Delete sysfs entries but hold kobject reference until after all 15089093bbb2SStephen Hemminger * netdev references are gone. 15099093bbb2SStephen Hemminger */ 15106b53dafeSWANG Cong void netdev_unregister_kobject(struct net_device *ndev) 15111da177e4SLinus Torvalds { 15126b53dafeSWANG Cong struct device *dev = &(ndev->dev); 15139093bbb2SStephen Hemminger 15149093bbb2SStephen Hemminger kobject_get(&dev->kobj); 15153891845eSEric W. Biederman 15166b53dafeSWANG Cong remove_queue_kobjects(ndev); 15170a9627f2STom Herbert 15189802c8e2SMing Lei pm_runtime_set_memalloc_noio(dev, false); 15199802c8e2SMing Lei 15209093bbb2SStephen Hemminger device_del(dev); 15211da177e4SLinus Torvalds } 15221da177e4SLinus Torvalds 15231da177e4SLinus Torvalds /* Create sysfs entries for network device. */ 15246b53dafeSWANG Cong int netdev_register_kobject(struct net_device *ndev) 15251da177e4SLinus Torvalds { 15266b53dafeSWANG Cong struct device *dev = &(ndev->dev); 15276b53dafeSWANG Cong const struct attribute_group **groups = ndev->sysfs_groups; 15280a9627f2STom Herbert int error = 0; 15291da177e4SLinus Torvalds 1530a1b3f594SEric W. Biederman device_initialize(dev); 153143cb76d9SGreg Kroah-Hartman dev->class = &net_class; 15326b53dafeSWANG Cong dev->platform_data = ndev; 153343cb76d9SGreg Kroah-Hartman dev->groups = groups; 15341da177e4SLinus Torvalds 15356b53dafeSWANG Cong dev_set_name(dev, "%s", ndev->name); 15361da177e4SLinus Torvalds 15378b41d188SEric W. Biederman #ifdef CONFIG_SYSFS 15380c509a6cSEric W. Biederman /* Allow for a device specific group */ 15390c509a6cSEric W. Biederman if (*groups) 15400c509a6cSEric W. Biederman groups++; 15411da177e4SLinus Torvalds 15420c509a6cSEric W. Biederman *groups++ = &netstat_group; 154338c1a01cSJohannes Berg 154438c1a01cSJohannes Berg #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) 15456b53dafeSWANG Cong if (ndev->ieee80211_ptr) 154638c1a01cSJohannes Berg *groups++ = &wireless_group; 154738c1a01cSJohannes Berg #if IS_ENABLED(CONFIG_WIRELESS_EXT) 15486b53dafeSWANG Cong else if (ndev->wireless_handlers) 154938c1a01cSJohannes Berg *groups++ = &wireless_group; 155038c1a01cSJohannes Berg #endif 155138c1a01cSJohannes Berg #endif 15528b41d188SEric W. Biederman #endif /* CONFIG_SYSFS */ 15531da177e4SLinus Torvalds 15540a9627f2STom Herbert error = device_add(dev); 15550a9627f2STom Herbert if (error) 15560a9627f2STom Herbert return error; 15570a9627f2STom Herbert 15586b53dafeSWANG Cong error = register_queue_kobjects(ndev); 15590a9627f2STom Herbert if (error) { 15600a9627f2STom Herbert device_del(dev); 15610a9627f2STom Herbert return error; 15620a9627f2STom Herbert } 15630a9627f2STom Herbert 15649802c8e2SMing Lei pm_runtime_set_memalloc_noio(dev, true); 15659802c8e2SMing Lei 15660a9627f2STom Herbert return error; 15671da177e4SLinus Torvalds } 15681da177e4SLinus Torvalds 156958292cbeSTejun Heo int netdev_class_create_file_ns(struct class_attribute *class_attr, 157058292cbeSTejun Heo const void *ns) 1571b8a9787eSJay Vosburgh { 157258292cbeSTejun Heo return class_create_file_ns(&net_class, class_attr, ns); 1573b8a9787eSJay Vosburgh } 157458292cbeSTejun Heo EXPORT_SYMBOL(netdev_class_create_file_ns); 1575b8a9787eSJay Vosburgh 157658292cbeSTejun Heo void netdev_class_remove_file_ns(struct class_attribute *class_attr, 157758292cbeSTejun Heo const void *ns) 1578b8a9787eSJay Vosburgh { 157958292cbeSTejun Heo class_remove_file_ns(&net_class, class_attr, ns); 1580b8a9787eSJay Vosburgh } 158158292cbeSTejun Heo EXPORT_SYMBOL(netdev_class_remove_file_ns); 1582b8a9787eSJay Vosburgh 1583a48d4bb0SDaniel Borkmann int __init netdev_kobject_init(void) 15841da177e4SLinus Torvalds { 1585608b4b95SEric W. Biederman kobj_ns_type_register(&net_ns_type_operations); 15861da177e4SLinus Torvalds return class_register(&net_class); 15871da177e4SLinus Torvalds } 1588