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> 2788832a22SBen Dooks #include <linux/of_net.h> 281da177e4SLinus Torvalds 29342709efSPavel Emelyanov #include "net-sysfs.h" 30342709efSPavel Emelyanov 318b41d188SEric W. Biederman #ifdef CONFIG_SYSFS 321da177e4SLinus Torvalds static const char fmt_hex[] = "%#x\n"; 331da177e4SLinus Torvalds static const char fmt_dec[] = "%d\n"; 341da177e4SLinus Torvalds static const char fmt_ulong[] = "%lu\n"; 35be1f3c2cSBen Hutchings static const char fmt_u64[] = "%llu\n"; 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds static inline int dev_isalive(const struct net_device *dev) 381da177e4SLinus Torvalds { 39fe9925b5SStephen Hemminger return dev->reg_state <= NETREG_REGISTERED; 401da177e4SLinus Torvalds } 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds /* use same locking rules as GIF* ioctl's */ 4343cb76d9SGreg Kroah-Hartman static ssize_t netdev_show(const struct device *dev, 4443cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf, 451da177e4SLinus Torvalds ssize_t (*format)(const struct net_device *, char *)) 461da177e4SLinus Torvalds { 476b53dafeSWANG Cong struct net_device *ndev = to_net_dev(dev); 481da177e4SLinus Torvalds ssize_t ret = -EINVAL; 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds read_lock(&dev_base_lock); 516b53dafeSWANG Cong if (dev_isalive(ndev)) 526b53dafeSWANG Cong ret = (*format)(ndev, buf); 531da177e4SLinus Torvalds read_unlock(&dev_base_lock); 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds return ret; 561da177e4SLinus Torvalds } 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds /* generate a show function for simple field */ 591da177e4SLinus Torvalds #define NETDEVICE_SHOW(field, format_string) \ 606b53dafeSWANG Cong static ssize_t format_##field(const struct net_device *dev, char *buf) \ 611da177e4SLinus Torvalds { \ 626b53dafeSWANG Cong return sprintf(buf, format_string, dev->field); \ 631da177e4SLinus Torvalds } \ 646be8aeefSGreg Kroah-Hartman static ssize_t field##_show(struct device *dev, \ 6543cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) \ 661da177e4SLinus Torvalds { \ 6743cb76d9SGreg Kroah-Hartman return netdev_show(dev, attr, buf, format_##field); \ 686be8aeefSGreg Kroah-Hartman } \ 691da177e4SLinus Torvalds 706be8aeefSGreg Kroah-Hartman #define NETDEVICE_SHOW_RO(field, format_string) \ 716be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW(field, format_string); \ 726be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(field) 736be8aeefSGreg Kroah-Hartman 746be8aeefSGreg Kroah-Hartman #define NETDEVICE_SHOW_RW(field, format_string) \ 756be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW(field, format_string); \ 766be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RW(field) 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds /* use same locking and permission rules as SIF* ioctl's */ 7943cb76d9SGreg Kroah-Hartman static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, 801da177e4SLinus Torvalds const char *buf, size_t len, 811da177e4SLinus Torvalds int (*set)(struct net_device *, unsigned long)) 821da177e4SLinus Torvalds { 835e1fccc0SEric W. Biederman struct net_device *netdev = to_net_dev(dev); 845e1fccc0SEric W. Biederman struct net *net = dev_net(netdev); 851da177e4SLinus Torvalds unsigned long new; 861da177e4SLinus Torvalds int ret = -EINVAL; 871da177e4SLinus Torvalds 885e1fccc0SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 891da177e4SLinus Torvalds return -EPERM; 901da177e4SLinus Torvalds 91e1e420c7SShuah Khan ret = kstrtoul(buf, 0, &new); 92e1e420c7SShuah Khan if (ret) 931da177e4SLinus Torvalds goto err; 941da177e4SLinus Torvalds 955a5990d3SStephen Hemminger if (!rtnl_trylock()) 96336ca57cSEric W. Biederman return restart_syscall(); 975a5990d3SStephen Hemminger 985e1fccc0SEric W. Biederman if (dev_isalive(netdev)) { 995e1fccc0SEric W. Biederman if ((ret = (*set)(netdev, new)) == 0) 1001da177e4SLinus Torvalds ret = len; 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds rtnl_unlock(); 1031da177e4SLinus Torvalds err: 1041da177e4SLinus Torvalds return ret; 1051da177e4SLinus Torvalds } 1061da177e4SLinus Torvalds 1076be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RO(dev_id, fmt_hex); 1083f85944fSAmir Vadai NETDEVICE_SHOW_RO(dev_port, fmt_dec); 1096be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec); 1106be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RO(addr_len, fmt_dec); 1116be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RO(ifindex, fmt_dec); 1126be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RO(type, fmt_dec); 1136be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RO(link_mode, fmt_dec); 1141da177e4SLinus Torvalds 115a54acb3aSNicolas Dichtel static ssize_t iflink_show(struct device *dev, struct device_attribute *attr, 116a54acb3aSNicolas Dichtel char *buf) 117a54acb3aSNicolas Dichtel { 118a54acb3aSNicolas Dichtel struct net_device *ndev = to_net_dev(dev); 119a54acb3aSNicolas Dichtel 120a54acb3aSNicolas Dichtel return sprintf(buf, fmt_dec, dev_get_iflink(ndev)); 121a54acb3aSNicolas Dichtel } 122a54acb3aSNicolas Dichtel static DEVICE_ATTR_RO(iflink); 123a54acb3aSNicolas Dichtel 1246b53dafeSWANG Cong static ssize_t format_name_assign_type(const struct net_device *dev, char *buf) 125685343fcSTom Gundersen { 1266b53dafeSWANG Cong return sprintf(buf, fmt_dec, dev->name_assign_type); 127685343fcSTom Gundersen } 128685343fcSTom Gundersen 129685343fcSTom Gundersen static ssize_t name_assign_type_show(struct device *dev, 130685343fcSTom Gundersen struct device_attribute *attr, 131685343fcSTom Gundersen char *buf) 132685343fcSTom Gundersen { 1336b53dafeSWANG Cong struct net_device *ndev = to_net_dev(dev); 134685343fcSTom Gundersen ssize_t ret = -EINVAL; 135685343fcSTom Gundersen 1366b53dafeSWANG Cong if (ndev->name_assign_type != NET_NAME_UNKNOWN) 137685343fcSTom Gundersen ret = netdev_show(dev, attr, buf, format_name_assign_type); 138685343fcSTom Gundersen 139685343fcSTom Gundersen return ret; 140685343fcSTom Gundersen } 141685343fcSTom Gundersen static DEVICE_ATTR_RO(name_assign_type); 142685343fcSTom Gundersen 1431da177e4SLinus Torvalds /* use same locking rules as GIFHWADDR ioctl's */ 1446be8aeefSGreg Kroah-Hartman static ssize_t address_show(struct device *dev, struct device_attribute *attr, 14543cb76d9SGreg Kroah-Hartman char *buf) 1461da177e4SLinus Torvalds { 1476b53dafeSWANG Cong struct net_device *ndev = to_net_dev(dev); 1481da177e4SLinus Torvalds ssize_t ret = -EINVAL; 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds read_lock(&dev_base_lock); 1516b53dafeSWANG Cong if (dev_isalive(ndev)) 1526b53dafeSWANG Cong ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len); 1531da177e4SLinus Torvalds read_unlock(&dev_base_lock); 1541da177e4SLinus Torvalds return ret; 1551da177e4SLinus Torvalds } 1566be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(address); 1571da177e4SLinus Torvalds 1586be8aeefSGreg Kroah-Hartman static ssize_t broadcast_show(struct device *dev, 15943cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 1601da177e4SLinus Torvalds { 1616b53dafeSWANG Cong struct net_device *ndev = to_net_dev(dev); 1626b53dafeSWANG Cong if (dev_isalive(ndev)) 1636b53dafeSWANG Cong return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len); 1641da177e4SLinus Torvalds return -EINVAL; 1651da177e4SLinus Torvalds } 1666be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(broadcast); 1671da177e4SLinus Torvalds 1686b53dafeSWANG Cong static int change_carrier(struct net_device *dev, unsigned long new_carrier) 169fdae0fdeSJiri Pirko { 1706b53dafeSWANG Cong if (!netif_running(dev)) 171fdae0fdeSJiri Pirko return -EINVAL; 1726b53dafeSWANG Cong return dev_change_carrier(dev, (bool) new_carrier); 173fdae0fdeSJiri Pirko } 174fdae0fdeSJiri Pirko 1756be8aeefSGreg Kroah-Hartman static ssize_t carrier_store(struct device *dev, struct device_attribute *attr, 176fdae0fdeSJiri Pirko const char *buf, size_t len) 177fdae0fdeSJiri Pirko { 178fdae0fdeSJiri Pirko return netdev_store(dev, attr, buf, len, change_carrier); 179fdae0fdeSJiri Pirko } 180fdae0fdeSJiri Pirko 1816be8aeefSGreg Kroah-Hartman static ssize_t carrier_show(struct device *dev, 18243cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 1831da177e4SLinus Torvalds { 1841da177e4SLinus Torvalds struct net_device *netdev = to_net_dev(dev); 1851da177e4SLinus Torvalds if (netif_running(netdev)) { 1861da177e4SLinus Torvalds return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds return -EINVAL; 1891da177e4SLinus Torvalds } 1906be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RW(carrier); 1911da177e4SLinus Torvalds 1926be8aeefSGreg Kroah-Hartman static ssize_t speed_show(struct device *dev, 193d519e17eSAndy Gospodarek struct device_attribute *attr, char *buf) 194d519e17eSAndy Gospodarek { 195d519e17eSAndy Gospodarek struct net_device *netdev = to_net_dev(dev); 196d519e17eSAndy Gospodarek int ret = -EINVAL; 197d519e17eSAndy Gospodarek 198d519e17eSAndy Gospodarek if (!rtnl_trylock()) 199d519e17eSAndy Gospodarek return restart_syscall(); 200d519e17eSAndy Gospodarek 2018ae6dacaSDavid Decotigny if (netif_running(netdev)) { 2027cad1bacSDavid Decotigny struct ethtool_link_ksettings cmd; 2037cad1bacSDavid Decotigny 2047cad1bacSDavid Decotigny if (!__ethtool_get_link_ksettings(netdev, &cmd)) 2057cad1bacSDavid Decotigny ret = sprintf(buf, fmt_dec, cmd.base.speed); 206d519e17eSAndy Gospodarek } 207d519e17eSAndy Gospodarek rtnl_unlock(); 208d519e17eSAndy Gospodarek return ret; 209d519e17eSAndy Gospodarek } 2106be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(speed); 211d519e17eSAndy Gospodarek 2126be8aeefSGreg Kroah-Hartman static ssize_t duplex_show(struct device *dev, 213d519e17eSAndy Gospodarek struct device_attribute *attr, char *buf) 214d519e17eSAndy Gospodarek { 215d519e17eSAndy Gospodarek struct net_device *netdev = to_net_dev(dev); 216d519e17eSAndy Gospodarek int ret = -EINVAL; 217d519e17eSAndy Gospodarek 218d519e17eSAndy Gospodarek if (!rtnl_trylock()) 219d519e17eSAndy Gospodarek return restart_syscall(); 220d519e17eSAndy Gospodarek 2218ae6dacaSDavid Decotigny if (netif_running(netdev)) { 2227cad1bacSDavid Decotigny struct ethtool_link_ksettings cmd; 2237cad1bacSDavid Decotigny 2247cad1bacSDavid Decotigny if (!__ethtool_get_link_ksettings(netdev, &cmd)) { 225c6c13965SNikolay Aleksandrov const char *duplex; 2267cad1bacSDavid Decotigny 2277cad1bacSDavid Decotigny switch (cmd.base.duplex) { 228c6c13965SNikolay Aleksandrov case DUPLEX_HALF: 229c6c13965SNikolay Aleksandrov duplex = "half"; 230c6c13965SNikolay Aleksandrov break; 231c6c13965SNikolay Aleksandrov case DUPLEX_FULL: 232c6c13965SNikolay Aleksandrov duplex = "full"; 233c6c13965SNikolay Aleksandrov break; 234c6c13965SNikolay Aleksandrov default: 235c6c13965SNikolay Aleksandrov duplex = "unknown"; 236c6c13965SNikolay Aleksandrov break; 237c6c13965SNikolay Aleksandrov } 238c6c13965SNikolay Aleksandrov ret = sprintf(buf, "%s\n", duplex); 239c6c13965SNikolay Aleksandrov } 240d519e17eSAndy Gospodarek } 241d519e17eSAndy Gospodarek rtnl_unlock(); 242d519e17eSAndy Gospodarek return ret; 243d519e17eSAndy Gospodarek } 2446be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(duplex); 245d519e17eSAndy Gospodarek 2466be8aeefSGreg Kroah-Hartman static ssize_t dormant_show(struct device *dev, 24743cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 248b00055aaSStefan Rompf { 249b00055aaSStefan Rompf struct net_device *netdev = to_net_dev(dev); 250b00055aaSStefan Rompf 251b00055aaSStefan Rompf if (netif_running(netdev)) 252b00055aaSStefan Rompf return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); 253b00055aaSStefan Rompf 254b00055aaSStefan Rompf return -EINVAL; 255b00055aaSStefan Rompf } 2566be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(dormant); 257b00055aaSStefan Rompf 25836cbd3dcSJan Engelhardt static const char *const operstates[] = { 259b00055aaSStefan Rompf "unknown", 260b00055aaSStefan Rompf "notpresent", /* currently unused */ 261b00055aaSStefan Rompf "down", 262b00055aaSStefan Rompf "lowerlayerdown", 263b00055aaSStefan Rompf "testing", /* currently unused */ 264b00055aaSStefan Rompf "dormant", 265b00055aaSStefan Rompf "up" 266b00055aaSStefan Rompf }; 267b00055aaSStefan Rompf 2686be8aeefSGreg Kroah-Hartman static ssize_t operstate_show(struct device *dev, 26943cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) 270b00055aaSStefan Rompf { 271b00055aaSStefan Rompf const struct net_device *netdev = to_net_dev(dev); 272b00055aaSStefan Rompf unsigned char operstate; 273b00055aaSStefan Rompf 274b00055aaSStefan Rompf read_lock(&dev_base_lock); 275b00055aaSStefan Rompf operstate = netdev->operstate; 276b00055aaSStefan Rompf if (!netif_running(netdev)) 277b00055aaSStefan Rompf operstate = IF_OPER_DOWN; 278b00055aaSStefan Rompf read_unlock(&dev_base_lock); 279b00055aaSStefan Rompf 280e3a5cd9eSAdrian Bunk if (operstate >= ARRAY_SIZE(operstates)) 281b00055aaSStefan Rompf return -EINVAL; /* should not happen */ 282b00055aaSStefan Rompf 283b00055aaSStefan Rompf return sprintf(buf, "%s\n", operstates[operstate]); 284b00055aaSStefan Rompf } 2856be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(operstate); 286b00055aaSStefan Rompf 2872d3b479dSdavid decotigny static ssize_t carrier_changes_show(struct device *dev, 2882d3b479dSdavid decotigny struct device_attribute *attr, 2892d3b479dSdavid decotigny char *buf) 2902d3b479dSdavid decotigny { 2912d3b479dSdavid decotigny struct net_device *netdev = to_net_dev(dev); 2922d3b479dSdavid decotigny return sprintf(buf, fmt_dec, 2932d3b479dSdavid decotigny atomic_read(&netdev->carrier_changes)); 2942d3b479dSdavid decotigny } 2952d3b479dSdavid decotigny static DEVICE_ATTR_RO(carrier_changes); 2962d3b479dSdavid decotigny 2971da177e4SLinus Torvalds /* read-write attributes */ 2981da177e4SLinus Torvalds 2996b53dafeSWANG Cong static int change_mtu(struct net_device *dev, unsigned long new_mtu) 3001da177e4SLinus Torvalds { 3016b53dafeSWANG Cong return dev_set_mtu(dev, (int) new_mtu); 3021da177e4SLinus Torvalds } 3031da177e4SLinus Torvalds 3046be8aeefSGreg Kroah-Hartman static ssize_t mtu_store(struct device *dev, struct device_attribute *attr, 30543cb76d9SGreg Kroah-Hartman const char *buf, size_t len) 3061da177e4SLinus Torvalds { 30743cb76d9SGreg Kroah-Hartman return netdev_store(dev, attr, buf, len, change_mtu); 3081da177e4SLinus Torvalds } 3096be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RW(mtu, fmt_dec); 3101da177e4SLinus Torvalds 3116b53dafeSWANG Cong static int change_flags(struct net_device *dev, unsigned long new_flags) 3121da177e4SLinus Torvalds { 3136b53dafeSWANG Cong return dev_change_flags(dev, (unsigned int) new_flags); 3141da177e4SLinus Torvalds } 3151da177e4SLinus Torvalds 3166be8aeefSGreg Kroah-Hartman static ssize_t flags_store(struct device *dev, struct device_attribute *attr, 31743cb76d9SGreg Kroah-Hartman const char *buf, size_t len) 3181da177e4SLinus Torvalds { 31943cb76d9SGreg Kroah-Hartman return netdev_store(dev, attr, buf, len, change_flags); 3201da177e4SLinus Torvalds } 3216be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RW(flags, fmt_hex); 3221da177e4SLinus Torvalds 3236b53dafeSWANG Cong static int change_tx_queue_len(struct net_device *dev, unsigned long new_len) 3241da177e4SLinus Torvalds { 325*08294a26SJason Wang int res, orig_len = dev->tx_queue_len; 326*08294a26SJason Wang 327*08294a26SJason Wang if (new_len != orig_len) { 3286b53dafeSWANG Cong dev->tx_queue_len = new_len; 329*08294a26SJason Wang res = call_netdevice_notifiers(NETDEV_CHANGE_TX_QUEUE_LEN, dev); 330*08294a26SJason Wang res = notifier_to_errno(res); 331*08294a26SJason Wang if (res) { 332*08294a26SJason Wang netdev_err(dev, 333*08294a26SJason Wang "refused to change device tx_queue_len\n"); 334*08294a26SJason Wang dev->tx_queue_len = orig_len; 335*08294a26SJason Wang return -EFAULT; 336*08294a26SJason Wang } 337*08294a26SJason Wang } 338*08294a26SJason Wang 3391da177e4SLinus Torvalds return 0; 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds 3426be8aeefSGreg Kroah-Hartman static ssize_t tx_queue_len_store(struct device *dev, 34343cb76d9SGreg Kroah-Hartman struct device_attribute *attr, 34443cb76d9SGreg Kroah-Hartman const char *buf, size_t len) 3451da177e4SLinus Torvalds { 3465e1fccc0SEric W. Biederman if (!capable(CAP_NET_ADMIN)) 3475e1fccc0SEric W. Biederman return -EPERM; 3485e1fccc0SEric W. Biederman 34943cb76d9SGreg Kroah-Hartman return netdev_store(dev, attr, buf, len, change_tx_queue_len); 3501da177e4SLinus Torvalds } 3516be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW_RW(tx_queue_len, fmt_ulong); 3521da177e4SLinus Torvalds 3533b47d303SEric Dumazet static int change_gro_flush_timeout(struct net_device *dev, unsigned long val) 3543b47d303SEric Dumazet { 3553b47d303SEric Dumazet dev->gro_flush_timeout = val; 3563b47d303SEric Dumazet return 0; 3573b47d303SEric Dumazet } 3583b47d303SEric Dumazet 3593b47d303SEric Dumazet static ssize_t gro_flush_timeout_store(struct device *dev, 3603b47d303SEric Dumazet struct device_attribute *attr, 3613b47d303SEric Dumazet const char *buf, size_t len) 3623b47d303SEric Dumazet { 3633b47d303SEric Dumazet if (!capable(CAP_NET_ADMIN)) 3643b47d303SEric Dumazet return -EPERM; 3653b47d303SEric Dumazet 3663b47d303SEric Dumazet return netdev_store(dev, attr, buf, len, change_gro_flush_timeout); 3673b47d303SEric Dumazet } 3683b47d303SEric Dumazet NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong); 3693b47d303SEric Dumazet 3706be8aeefSGreg Kroah-Hartman static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr, 3710b815a1aSStephen Hemminger const char *buf, size_t len) 3720b815a1aSStephen Hemminger { 3730b815a1aSStephen Hemminger struct net_device *netdev = to_net_dev(dev); 3745e1fccc0SEric W. Biederman struct net *net = dev_net(netdev); 3750b815a1aSStephen Hemminger size_t count = len; 3760b815a1aSStephen Hemminger ssize_t ret; 3770b815a1aSStephen Hemminger 3785e1fccc0SEric W. Biederman if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 3790b815a1aSStephen Hemminger return -EPERM; 3800b815a1aSStephen Hemminger 3810b815a1aSStephen Hemminger /* ignore trailing newline */ 3820b815a1aSStephen Hemminger if (len > 0 && buf[len - 1] == '\n') 3830b815a1aSStephen Hemminger --count; 3840b815a1aSStephen Hemminger 385336ca57cSEric W. Biederman if (!rtnl_trylock()) 386336ca57cSEric W. Biederman return restart_syscall(); 3870b815a1aSStephen Hemminger ret = dev_set_alias(netdev, buf, count); 3880b815a1aSStephen Hemminger rtnl_unlock(); 3890b815a1aSStephen Hemminger 3900b815a1aSStephen Hemminger return ret < 0 ? ret : len; 3910b815a1aSStephen Hemminger } 3920b815a1aSStephen Hemminger 3936be8aeefSGreg Kroah-Hartman static ssize_t ifalias_show(struct device *dev, 3940b815a1aSStephen Hemminger struct device_attribute *attr, char *buf) 3950b815a1aSStephen Hemminger { 3960b815a1aSStephen Hemminger const struct net_device *netdev = to_net_dev(dev); 3970b815a1aSStephen Hemminger ssize_t ret = 0; 3980b815a1aSStephen Hemminger 399336ca57cSEric W. Biederman if (!rtnl_trylock()) 400336ca57cSEric W. Biederman return restart_syscall(); 4010b815a1aSStephen Hemminger if (netdev->ifalias) 4020b815a1aSStephen Hemminger ret = sprintf(buf, "%s\n", netdev->ifalias); 4030b815a1aSStephen Hemminger rtnl_unlock(); 4040b815a1aSStephen Hemminger return ret; 4050b815a1aSStephen Hemminger } 4066be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RW(ifalias); 407a512b92bSVlad Dogaru 4086b53dafeSWANG Cong static int change_group(struct net_device *dev, unsigned long new_group) 409a512b92bSVlad Dogaru { 4106b53dafeSWANG Cong dev_set_group(dev, (int) new_group); 411a512b92bSVlad Dogaru return 0; 412a512b92bSVlad Dogaru } 413a512b92bSVlad Dogaru 4146be8aeefSGreg Kroah-Hartman static ssize_t group_store(struct device *dev, struct device_attribute *attr, 415a512b92bSVlad Dogaru const char *buf, size_t len) 416a512b92bSVlad Dogaru { 417a512b92bSVlad Dogaru return netdev_store(dev, attr, buf, len, change_group); 418a512b92bSVlad Dogaru } 4196be8aeefSGreg Kroah-Hartman NETDEVICE_SHOW(group, fmt_dec); 4206be8aeefSGreg Kroah-Hartman static DEVICE_ATTR(netdev_group, S_IRUGO | S_IWUSR, group_show, group_store); 421a512b92bSVlad Dogaru 422d746d707SAnuradha Karuppiah static int change_proto_down(struct net_device *dev, unsigned long proto_down) 423d746d707SAnuradha Karuppiah { 424d746d707SAnuradha Karuppiah return dev_change_proto_down(dev, (bool) proto_down); 425d746d707SAnuradha Karuppiah } 426d746d707SAnuradha Karuppiah 427d746d707SAnuradha Karuppiah static ssize_t proto_down_store(struct device *dev, 428d746d707SAnuradha Karuppiah struct device_attribute *attr, 429d746d707SAnuradha Karuppiah const char *buf, size_t len) 430d746d707SAnuradha Karuppiah { 431d746d707SAnuradha Karuppiah return netdev_store(dev, attr, buf, len, change_proto_down); 432d746d707SAnuradha Karuppiah } 433d746d707SAnuradha Karuppiah NETDEVICE_SHOW_RW(proto_down, fmt_dec); 434d746d707SAnuradha Karuppiah 435cc998ff8SLinus Torvalds static ssize_t phys_port_id_show(struct device *dev, 436ff80e519SJiri Pirko struct device_attribute *attr, char *buf) 437ff80e519SJiri Pirko { 438ff80e519SJiri Pirko struct net_device *netdev = to_net_dev(dev); 439ff80e519SJiri Pirko ssize_t ret = -EINVAL; 440ff80e519SJiri Pirko 441ff80e519SJiri Pirko if (!rtnl_trylock()) 442ff80e519SJiri Pirko return restart_syscall(); 443ff80e519SJiri Pirko 444ff80e519SJiri Pirko if (dev_isalive(netdev)) { 44502637fceSJiri Pirko struct netdev_phys_item_id ppid; 446ff80e519SJiri Pirko 447ff80e519SJiri Pirko ret = dev_get_phys_port_id(netdev, &ppid); 448ff80e519SJiri Pirko if (!ret) 449ff80e519SJiri Pirko ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); 450ff80e519SJiri Pirko } 451ff80e519SJiri Pirko rtnl_unlock(); 452ff80e519SJiri Pirko 453ff80e519SJiri Pirko return ret; 454ff80e519SJiri Pirko } 455cc998ff8SLinus Torvalds static DEVICE_ATTR_RO(phys_port_id); 456ff80e519SJiri Pirko 457db24a904SDavid Ahern static ssize_t phys_port_name_show(struct device *dev, 458db24a904SDavid Ahern struct device_attribute *attr, char *buf) 459db24a904SDavid Ahern { 460db24a904SDavid Ahern struct net_device *netdev = to_net_dev(dev); 461db24a904SDavid Ahern ssize_t ret = -EINVAL; 462db24a904SDavid Ahern 463db24a904SDavid Ahern if (!rtnl_trylock()) 464db24a904SDavid Ahern return restart_syscall(); 465db24a904SDavid Ahern 466db24a904SDavid Ahern if (dev_isalive(netdev)) { 467db24a904SDavid Ahern char name[IFNAMSIZ]; 468db24a904SDavid Ahern 469db24a904SDavid Ahern ret = dev_get_phys_port_name(netdev, name, sizeof(name)); 470db24a904SDavid Ahern if (!ret) 471db24a904SDavid Ahern ret = sprintf(buf, "%s\n", name); 472db24a904SDavid Ahern } 473db24a904SDavid Ahern rtnl_unlock(); 474db24a904SDavid Ahern 475db24a904SDavid Ahern return ret; 476db24a904SDavid Ahern } 477db24a904SDavid Ahern static DEVICE_ATTR_RO(phys_port_name); 478db24a904SDavid Ahern 479aecbe01eSJiri Pirko static ssize_t phys_switch_id_show(struct device *dev, 480aecbe01eSJiri Pirko struct device_attribute *attr, char *buf) 481aecbe01eSJiri Pirko { 482aecbe01eSJiri Pirko struct net_device *netdev = to_net_dev(dev); 483aecbe01eSJiri Pirko ssize_t ret = -EINVAL; 484aecbe01eSJiri Pirko 485aecbe01eSJiri Pirko if (!rtnl_trylock()) 486aecbe01eSJiri Pirko return restart_syscall(); 487aecbe01eSJiri Pirko 488aecbe01eSJiri Pirko if (dev_isalive(netdev)) { 489f8e20a9fSScott Feldman struct switchdev_attr attr = { 4906ff64f6fSIdo Schimmel .orig_dev = netdev, 4911f868398SJiri Pirko .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, 492f8e20a9fSScott Feldman .flags = SWITCHDEV_F_NO_RECURSE, 493f8e20a9fSScott Feldman }; 494aecbe01eSJiri Pirko 495f8e20a9fSScott Feldman ret = switchdev_port_attr_get(netdev, &attr); 496aecbe01eSJiri Pirko if (!ret) 49742275bd8SScott Feldman ret = sprintf(buf, "%*phN\n", attr.u.ppid.id_len, 49842275bd8SScott Feldman attr.u.ppid.id); 499aecbe01eSJiri Pirko } 500aecbe01eSJiri Pirko rtnl_unlock(); 501aecbe01eSJiri Pirko 502aecbe01eSJiri Pirko return ret; 503aecbe01eSJiri Pirko } 504aecbe01eSJiri Pirko static DEVICE_ATTR_RO(phys_switch_id); 505aecbe01eSJiri Pirko 5066be8aeefSGreg Kroah-Hartman static struct attribute *net_class_attrs[] = { 5076be8aeefSGreg Kroah-Hartman &dev_attr_netdev_group.attr, 5086be8aeefSGreg Kroah-Hartman &dev_attr_type.attr, 5096be8aeefSGreg Kroah-Hartman &dev_attr_dev_id.attr, 5103f85944fSAmir Vadai &dev_attr_dev_port.attr, 5116be8aeefSGreg Kroah-Hartman &dev_attr_iflink.attr, 5126be8aeefSGreg Kroah-Hartman &dev_attr_ifindex.attr, 513685343fcSTom Gundersen &dev_attr_name_assign_type.attr, 5146be8aeefSGreg Kroah-Hartman &dev_attr_addr_assign_type.attr, 5156be8aeefSGreg Kroah-Hartman &dev_attr_addr_len.attr, 5166be8aeefSGreg Kroah-Hartman &dev_attr_link_mode.attr, 5176be8aeefSGreg Kroah-Hartman &dev_attr_address.attr, 5186be8aeefSGreg Kroah-Hartman &dev_attr_broadcast.attr, 5196be8aeefSGreg Kroah-Hartman &dev_attr_speed.attr, 5206be8aeefSGreg Kroah-Hartman &dev_attr_duplex.attr, 5216be8aeefSGreg Kroah-Hartman &dev_attr_dormant.attr, 5226be8aeefSGreg Kroah-Hartman &dev_attr_operstate.attr, 5232d3b479dSdavid decotigny &dev_attr_carrier_changes.attr, 5246be8aeefSGreg Kroah-Hartman &dev_attr_ifalias.attr, 5256be8aeefSGreg Kroah-Hartman &dev_attr_carrier.attr, 5266be8aeefSGreg Kroah-Hartman &dev_attr_mtu.attr, 5276be8aeefSGreg Kroah-Hartman &dev_attr_flags.attr, 5286be8aeefSGreg Kroah-Hartman &dev_attr_tx_queue_len.attr, 5293b47d303SEric Dumazet &dev_attr_gro_flush_timeout.attr, 530cc998ff8SLinus Torvalds &dev_attr_phys_port_id.attr, 531db24a904SDavid Ahern &dev_attr_phys_port_name.attr, 532aecbe01eSJiri Pirko &dev_attr_phys_switch_id.attr, 533d746d707SAnuradha Karuppiah &dev_attr_proto_down.attr, 5346be8aeefSGreg Kroah-Hartman NULL, 5351da177e4SLinus Torvalds }; 5366be8aeefSGreg Kroah-Hartman ATTRIBUTE_GROUPS(net_class); 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds /* Show a given an attribute in the statistics group */ 53943cb76d9SGreg Kroah-Hartman static ssize_t netstat_show(const struct device *d, 54043cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf, 5411da177e4SLinus Torvalds unsigned long offset) 5421da177e4SLinus Torvalds { 54343cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 5441da177e4SLinus Torvalds ssize_t ret = -EINVAL; 5451da177e4SLinus Torvalds 546be1f3c2cSBen Hutchings WARN_ON(offset > sizeof(struct rtnl_link_stats64) || 547be1f3c2cSBen Hutchings offset % sizeof(u64) != 0); 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds read_lock(&dev_base_lock); 55096e74088SPavel Emelyanov if (dev_isalive(dev)) { 55128172739SEric Dumazet struct rtnl_link_stats64 temp; 55228172739SEric Dumazet const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); 55328172739SEric Dumazet 554be1f3c2cSBen Hutchings ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); 55596e74088SPavel Emelyanov } 5561da177e4SLinus Torvalds read_unlock(&dev_base_lock); 5571da177e4SLinus Torvalds return ret; 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds /* generate a read-only statistics attribute */ 5611da177e4SLinus Torvalds #define NETSTAT_ENTRY(name) \ 5626be8aeefSGreg Kroah-Hartman static ssize_t name##_show(struct device *d, \ 56343cb76d9SGreg Kroah-Hartman struct device_attribute *attr, char *buf) \ 5641da177e4SLinus Torvalds { \ 56543cb76d9SGreg Kroah-Hartman return netstat_show(d, attr, buf, \ 566be1f3c2cSBen Hutchings offsetof(struct rtnl_link_stats64, name)); \ 5671da177e4SLinus Torvalds } \ 5686be8aeefSGreg Kroah-Hartman static DEVICE_ATTR_RO(name) 5691da177e4SLinus Torvalds 5701da177e4SLinus Torvalds NETSTAT_ENTRY(rx_packets); 5711da177e4SLinus Torvalds NETSTAT_ENTRY(tx_packets); 5721da177e4SLinus Torvalds NETSTAT_ENTRY(rx_bytes); 5731da177e4SLinus Torvalds NETSTAT_ENTRY(tx_bytes); 5741da177e4SLinus Torvalds NETSTAT_ENTRY(rx_errors); 5751da177e4SLinus Torvalds NETSTAT_ENTRY(tx_errors); 5761da177e4SLinus Torvalds NETSTAT_ENTRY(rx_dropped); 5771da177e4SLinus Torvalds NETSTAT_ENTRY(tx_dropped); 5781da177e4SLinus Torvalds NETSTAT_ENTRY(multicast); 5791da177e4SLinus Torvalds NETSTAT_ENTRY(collisions); 5801da177e4SLinus Torvalds NETSTAT_ENTRY(rx_length_errors); 5811da177e4SLinus Torvalds NETSTAT_ENTRY(rx_over_errors); 5821da177e4SLinus Torvalds NETSTAT_ENTRY(rx_crc_errors); 5831da177e4SLinus Torvalds NETSTAT_ENTRY(rx_frame_errors); 5841da177e4SLinus Torvalds NETSTAT_ENTRY(rx_fifo_errors); 5851da177e4SLinus Torvalds NETSTAT_ENTRY(rx_missed_errors); 5861da177e4SLinus Torvalds NETSTAT_ENTRY(tx_aborted_errors); 5871da177e4SLinus Torvalds NETSTAT_ENTRY(tx_carrier_errors); 5881da177e4SLinus Torvalds NETSTAT_ENTRY(tx_fifo_errors); 5891da177e4SLinus Torvalds NETSTAT_ENTRY(tx_heartbeat_errors); 5901da177e4SLinus Torvalds NETSTAT_ENTRY(tx_window_errors); 5911da177e4SLinus Torvalds NETSTAT_ENTRY(rx_compressed); 5921da177e4SLinus Torvalds NETSTAT_ENTRY(tx_compressed); 5936e7333d3SJarod Wilson NETSTAT_ENTRY(rx_nohandler); 5941da177e4SLinus Torvalds 5951da177e4SLinus Torvalds static struct attribute *netstat_attrs[] = { 59643cb76d9SGreg Kroah-Hartman &dev_attr_rx_packets.attr, 59743cb76d9SGreg Kroah-Hartman &dev_attr_tx_packets.attr, 59843cb76d9SGreg Kroah-Hartman &dev_attr_rx_bytes.attr, 59943cb76d9SGreg Kroah-Hartman &dev_attr_tx_bytes.attr, 60043cb76d9SGreg Kroah-Hartman &dev_attr_rx_errors.attr, 60143cb76d9SGreg Kroah-Hartman &dev_attr_tx_errors.attr, 60243cb76d9SGreg Kroah-Hartman &dev_attr_rx_dropped.attr, 60343cb76d9SGreg Kroah-Hartman &dev_attr_tx_dropped.attr, 60443cb76d9SGreg Kroah-Hartman &dev_attr_multicast.attr, 60543cb76d9SGreg Kroah-Hartman &dev_attr_collisions.attr, 60643cb76d9SGreg Kroah-Hartman &dev_attr_rx_length_errors.attr, 60743cb76d9SGreg Kroah-Hartman &dev_attr_rx_over_errors.attr, 60843cb76d9SGreg Kroah-Hartman &dev_attr_rx_crc_errors.attr, 60943cb76d9SGreg Kroah-Hartman &dev_attr_rx_frame_errors.attr, 61043cb76d9SGreg Kroah-Hartman &dev_attr_rx_fifo_errors.attr, 61143cb76d9SGreg Kroah-Hartman &dev_attr_rx_missed_errors.attr, 61243cb76d9SGreg Kroah-Hartman &dev_attr_tx_aborted_errors.attr, 61343cb76d9SGreg Kroah-Hartman &dev_attr_tx_carrier_errors.attr, 61443cb76d9SGreg Kroah-Hartman &dev_attr_tx_fifo_errors.attr, 61543cb76d9SGreg Kroah-Hartman &dev_attr_tx_heartbeat_errors.attr, 61643cb76d9SGreg Kroah-Hartman &dev_attr_tx_window_errors.attr, 61743cb76d9SGreg Kroah-Hartman &dev_attr_rx_compressed.attr, 61843cb76d9SGreg Kroah-Hartman &dev_attr_tx_compressed.attr, 6196e7333d3SJarod Wilson &dev_attr_rx_nohandler.attr, 6201da177e4SLinus Torvalds NULL 6211da177e4SLinus Torvalds }; 6221da177e4SLinus Torvalds 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvalds static struct attribute_group netstat_group = { 6251da177e4SLinus Torvalds .name = "statistics", 6261da177e4SLinus Torvalds .attrs = netstat_attrs, 6271da177e4SLinus Torvalds }; 62838c1a01cSJohannes Berg 62938c1a01cSJohannes Berg #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) 63038c1a01cSJohannes Berg static struct attribute *wireless_attrs[] = { 63138c1a01cSJohannes Berg NULL 63238c1a01cSJohannes Berg }; 63338c1a01cSJohannes Berg 63438c1a01cSJohannes Berg static struct attribute_group wireless_group = { 63538c1a01cSJohannes Berg .name = "wireless", 63638c1a01cSJohannes Berg .attrs = wireless_attrs, 63738c1a01cSJohannes Berg }; 63838c1a01cSJohannes Berg #endif 6396be8aeefSGreg Kroah-Hartman 6406be8aeefSGreg Kroah-Hartman #else /* CONFIG_SYSFS */ 6416be8aeefSGreg Kroah-Hartman #define net_class_groups NULL 642d6523ddfSEric W. Biederman #endif /* CONFIG_SYSFS */ 6431da177e4SLinus Torvalds 644a953be53SMichael Dalton #ifdef CONFIG_SYSFS 6450a9627f2STom Herbert #define to_rx_queue_attr(_attr) container_of(_attr, \ 6460a9627f2STom Herbert struct rx_queue_attribute, attr) 6470a9627f2STom Herbert 6480a9627f2STom Herbert #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) 6490a9627f2STom Herbert 6500a9627f2STom Herbert static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, 6510a9627f2STom Herbert char *buf) 6520a9627f2STom Herbert { 6530a9627f2STom Herbert struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); 6540a9627f2STom Herbert struct netdev_rx_queue *queue = to_rx_queue(kobj); 6550a9627f2STom Herbert 6560a9627f2STom Herbert if (!attribute->show) 6570a9627f2STom Herbert return -EIO; 6580a9627f2STom Herbert 6590a9627f2STom Herbert return attribute->show(queue, attribute, buf); 6600a9627f2STom Herbert } 6610a9627f2STom Herbert 6620a9627f2STom Herbert static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, 6630a9627f2STom Herbert const char *buf, size_t count) 6640a9627f2STom Herbert { 6650a9627f2STom Herbert struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); 6660a9627f2STom Herbert struct netdev_rx_queue *queue = to_rx_queue(kobj); 6670a9627f2STom Herbert 6680a9627f2STom Herbert if (!attribute->store) 6690a9627f2STom Herbert return -EIO; 6700a9627f2STom Herbert 6710a9627f2STom Herbert return attribute->store(queue, attribute, buf, count); 6720a9627f2STom Herbert } 6730a9627f2STom Herbert 674fa50d645Sstephen hemminger static const struct sysfs_ops rx_queue_sysfs_ops = { 6750a9627f2STom Herbert .show = rx_queue_attr_show, 6760a9627f2STom Herbert .store = rx_queue_attr_store, 6770a9627f2STom Herbert }; 6780a9627f2STom Herbert 679a953be53SMichael Dalton #ifdef CONFIG_RPS 6800a9627f2STom Herbert static ssize_t show_rps_map(struct netdev_rx_queue *queue, 6810a9627f2STom Herbert struct rx_queue_attribute *attribute, char *buf) 6820a9627f2STom Herbert { 6830a9627f2STom Herbert struct rps_map *map; 6840a9627f2STom Herbert cpumask_var_t mask; 685f0906827STejun Heo int i, len; 6860a9627f2STom Herbert 6870a9627f2STom Herbert if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) 6880a9627f2STom Herbert return -ENOMEM; 6890a9627f2STom Herbert 6900a9627f2STom Herbert rcu_read_lock(); 6910a9627f2STom Herbert map = rcu_dereference(queue->rps_map); 6920a9627f2STom Herbert if (map) 6930a9627f2STom Herbert for (i = 0; i < map->len; i++) 6940a9627f2STom Herbert cpumask_set_cpu(map->cpus[i], mask); 6950a9627f2STom Herbert 696f0906827STejun Heo len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); 6970a9627f2STom Herbert rcu_read_unlock(); 6980a9627f2STom Herbert free_cpumask_var(mask); 6990a9627f2STom Herbert 700f0906827STejun Heo return len < PAGE_SIZE ? len : -EINVAL; 7010a9627f2STom Herbert } 7020a9627f2STom Herbert 703f5acb907SEric Dumazet static ssize_t store_rps_map(struct netdev_rx_queue *queue, 7040a9627f2STom Herbert struct rx_queue_attribute *attribute, 7050a9627f2STom Herbert const char *buf, size_t len) 7060a9627f2STom Herbert { 7070a9627f2STom Herbert struct rps_map *old_map, *map; 7080a9627f2STom Herbert cpumask_var_t mask; 7090a9627f2STom Herbert int err, cpu, i; 710da65ad1fSSasha Levin static DEFINE_MUTEX(rps_map_mutex); 7110a9627f2STom Herbert 7120a9627f2STom Herbert if (!capable(CAP_NET_ADMIN)) 7130a9627f2STom Herbert return -EPERM; 7140a9627f2STom Herbert 7150a9627f2STom Herbert if (!alloc_cpumask_var(&mask, GFP_KERNEL)) 7160a9627f2STom Herbert return -ENOMEM; 7170a9627f2STom Herbert 7180a9627f2STom Herbert err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); 7190a9627f2STom Herbert if (err) { 7200a9627f2STom Herbert free_cpumask_var(mask); 7210a9627f2STom Herbert return err; 7220a9627f2STom Herbert } 7230a9627f2STom Herbert 72495c96174SEric Dumazet map = kzalloc(max_t(unsigned int, 7250a9627f2STom Herbert RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), 7260a9627f2STom Herbert GFP_KERNEL); 7270a9627f2STom Herbert if (!map) { 7280a9627f2STom Herbert free_cpumask_var(mask); 7290a9627f2STom Herbert return -ENOMEM; 7300a9627f2STom Herbert } 7310a9627f2STom Herbert 7320a9627f2STom Herbert i = 0; 7330a9627f2STom Herbert for_each_cpu_and(cpu, mask, cpu_online_mask) 7340a9627f2STom Herbert map->cpus[i++] = cpu; 7350a9627f2STom Herbert 7360a9627f2STom Herbert if (i) 7370a9627f2STom Herbert map->len = i; 7380a9627f2STom Herbert else { 7390a9627f2STom Herbert kfree(map); 7400a9627f2STom Herbert map = NULL; 7410a9627f2STom Herbert } 7420a9627f2STom Herbert 743da65ad1fSSasha Levin mutex_lock(&rps_map_mutex); 7446e3f7fafSEric Dumazet old_map = rcu_dereference_protected(queue->rps_map, 745da65ad1fSSasha Levin mutex_is_locked(&rps_map_mutex)); 7460a9627f2STom Herbert rcu_assign_pointer(queue->rps_map, map); 7470a9627f2STom Herbert 748adc9300eSEric Dumazet if (map) 749c5905afbSIngo Molnar static_key_slow_inc(&rps_needed); 75010e4ea75STom Herbert if (old_map) 751c5905afbSIngo Molnar static_key_slow_dec(&rps_needed); 75210e4ea75STom Herbert 753da65ad1fSSasha Levin mutex_unlock(&rps_map_mutex); 75410e4ea75STom Herbert 75510e4ea75STom Herbert if (old_map) 75610e4ea75STom Herbert kfree_rcu(old_map, rcu); 75710e4ea75STom Herbert 7580a9627f2STom Herbert free_cpumask_var(mask); 7590a9627f2STom Herbert return len; 7600a9627f2STom Herbert } 7610a9627f2STom Herbert 762fec5e652STom Herbert static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, 763fec5e652STom Herbert struct rx_queue_attribute *attr, 764fec5e652STom Herbert char *buf) 765fec5e652STom Herbert { 766fec5e652STom Herbert struct rps_dev_flow_table *flow_table; 76760b778ceSEric Dumazet unsigned long val = 0; 768fec5e652STom Herbert 769fec5e652STom Herbert rcu_read_lock(); 770fec5e652STom Herbert flow_table = rcu_dereference(queue->rps_flow_table); 771fec5e652STom Herbert if (flow_table) 77260b778ceSEric Dumazet val = (unsigned long)flow_table->mask + 1; 773fec5e652STom Herbert rcu_read_unlock(); 774fec5e652STom Herbert 77560b778ceSEric Dumazet return sprintf(buf, "%lu\n", val); 776fec5e652STom Herbert } 777fec5e652STom Herbert 778fec5e652STom Herbert static void rps_dev_flow_table_release(struct rcu_head *rcu) 779fec5e652STom Herbert { 780fec5e652STom Herbert struct rps_dev_flow_table *table = container_of(rcu, 781fec5e652STom Herbert struct rps_dev_flow_table, rcu); 782243198d0SAl Viro vfree(table); 783fec5e652STom Herbert } 784fec5e652STom Herbert 785f5acb907SEric Dumazet static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, 786fec5e652STom Herbert struct rx_queue_attribute *attr, 787fec5e652STom Herbert const char *buf, size_t len) 788fec5e652STom Herbert { 78960b778ceSEric Dumazet unsigned long mask, count; 790fec5e652STom Herbert struct rps_dev_flow_table *table, *old_table; 791fec5e652STom Herbert static DEFINE_SPINLOCK(rps_dev_flow_lock); 79260b778ceSEric Dumazet int rc; 793fec5e652STom Herbert 794fec5e652STom Herbert if (!capable(CAP_NET_ADMIN)) 795fec5e652STom Herbert return -EPERM; 796fec5e652STom Herbert 79760b778ceSEric Dumazet rc = kstrtoul(buf, 0, &count); 79860b778ceSEric Dumazet if (rc < 0) 79960b778ceSEric Dumazet return rc; 800fec5e652STom Herbert 801fec5e652STom Herbert if (count) { 80260b778ceSEric Dumazet mask = count - 1; 80360b778ceSEric Dumazet /* mask = roundup_pow_of_two(count) - 1; 80460b778ceSEric Dumazet * without overflows... 80560b778ceSEric Dumazet */ 80660b778ceSEric Dumazet while ((mask | (mask >> 1)) != mask) 80760b778ceSEric Dumazet mask |= (mask >> 1); 80860b778ceSEric Dumazet /* On 64 bit arches, must check mask fits in table->mask (u32), 8098e3bff96Sstephen hemminger * and on 32bit arches, must check 8108e3bff96Sstephen hemminger * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow. 81160b778ceSEric Dumazet */ 81260b778ceSEric Dumazet #if BITS_PER_LONG > 32 81360b778ceSEric Dumazet if (mask > (unsigned long)(u32)mask) 814a0a129f8SXi Wang return -EINVAL; 81560b778ceSEric Dumazet #else 81660b778ceSEric Dumazet if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) 817a0a129f8SXi Wang / sizeof(struct rps_dev_flow)) { 818fec5e652STom Herbert /* Enforce a limit to prevent overflow */ 819fec5e652STom Herbert return -EINVAL; 820fec5e652STom Herbert } 82160b778ceSEric Dumazet #endif 82260b778ceSEric Dumazet table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); 823fec5e652STom Herbert if (!table) 824fec5e652STom Herbert return -ENOMEM; 825fec5e652STom Herbert 82660b778ceSEric Dumazet table->mask = mask; 82760b778ceSEric Dumazet for (count = 0; count <= mask; count++) 82860b778ceSEric Dumazet table->flows[count].cpu = RPS_NO_CPU; 829fec5e652STom Herbert } else 830fec5e652STom Herbert table = NULL; 831fec5e652STom Herbert 832fec5e652STom Herbert spin_lock(&rps_dev_flow_lock); 8336e3f7fafSEric Dumazet old_table = rcu_dereference_protected(queue->rps_flow_table, 8346e3f7fafSEric Dumazet lockdep_is_held(&rps_dev_flow_lock)); 835fec5e652STom Herbert rcu_assign_pointer(queue->rps_flow_table, table); 836fec5e652STom Herbert spin_unlock(&rps_dev_flow_lock); 837fec5e652STom Herbert 838fec5e652STom Herbert if (old_table) 839fec5e652STom Herbert call_rcu(&old_table->rcu, rps_dev_flow_table_release); 840fec5e652STom Herbert 841fec5e652STom Herbert return len; 842fec5e652STom Herbert } 843fec5e652STom Herbert 8440a9627f2STom Herbert static struct rx_queue_attribute rps_cpus_attribute = 8450a9627f2STom Herbert __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); 8460a9627f2STom Herbert 847fec5e652STom Herbert 848fec5e652STom Herbert static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = 849fec5e652STom Herbert __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, 850fec5e652STom Herbert show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); 851a953be53SMichael Dalton #endif /* CONFIG_RPS */ 852fec5e652STom Herbert 8530a9627f2STom Herbert static struct attribute *rx_queue_default_attrs[] = { 854a953be53SMichael Dalton #ifdef CONFIG_RPS 8550a9627f2STom Herbert &rps_cpus_attribute.attr, 856fec5e652STom Herbert &rps_dev_flow_table_cnt_attribute.attr, 857a953be53SMichael Dalton #endif 8580a9627f2STom Herbert NULL 8590a9627f2STom Herbert }; 8600a9627f2STom Herbert 8610a9627f2STom Herbert static void rx_queue_release(struct kobject *kobj) 8620a9627f2STom Herbert { 8630a9627f2STom Herbert struct netdev_rx_queue *queue = to_rx_queue(kobj); 864a953be53SMichael Dalton #ifdef CONFIG_RPS 8656e3f7fafSEric Dumazet struct rps_map *map; 8666e3f7fafSEric Dumazet struct rps_dev_flow_table *flow_table; 8670a9627f2STom Herbert 868fec5e652STom Herbert 86933d480ceSEric Dumazet map = rcu_dereference_protected(queue->rps_map, 1); 8709ea19481SJohn Fastabend if (map) { 8719ea19481SJohn Fastabend RCU_INIT_POINTER(queue->rps_map, NULL); 872f6f80238SLai Jiangshan kfree_rcu(map, rcu); 8739ea19481SJohn Fastabend } 8746e3f7fafSEric Dumazet 87533d480ceSEric Dumazet flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); 8769ea19481SJohn Fastabend if (flow_table) { 8779ea19481SJohn Fastabend RCU_INIT_POINTER(queue->rps_flow_table, NULL); 8786e3f7fafSEric Dumazet call_rcu(&flow_table->rcu, rps_dev_flow_table_release); 8799ea19481SJohn Fastabend } 880a953be53SMichael Dalton #endif 8810a9627f2STom Herbert 8829ea19481SJohn Fastabend memset(kobj, 0, sizeof(*kobj)); 883fe822240STom Herbert dev_put(queue->dev); 8840a9627f2STom Herbert } 8850a9627f2STom Herbert 88682ef3d5dSWeilong Chen static const void *rx_queue_namespace(struct kobject *kobj) 88782ef3d5dSWeilong Chen { 88882ef3d5dSWeilong Chen struct netdev_rx_queue *queue = to_rx_queue(kobj); 88982ef3d5dSWeilong Chen struct device *dev = &queue->dev->dev; 89082ef3d5dSWeilong Chen const void *ns = NULL; 89182ef3d5dSWeilong Chen 89282ef3d5dSWeilong Chen if (dev->class && dev->class->ns_type) 89382ef3d5dSWeilong Chen ns = dev->class->namespace(dev); 89482ef3d5dSWeilong Chen 89582ef3d5dSWeilong Chen return ns; 89682ef3d5dSWeilong Chen } 89782ef3d5dSWeilong Chen 8980a9627f2STom Herbert static struct kobj_type rx_queue_ktype = { 8990a9627f2STom Herbert .sysfs_ops = &rx_queue_sysfs_ops, 9000a9627f2STom Herbert .release = rx_queue_release, 9010a9627f2STom Herbert .default_attrs = rx_queue_default_attrs, 90282ef3d5dSWeilong Chen .namespace = rx_queue_namespace 9030a9627f2STom Herbert }; 9040a9627f2STom Herbert 9056b53dafeSWANG Cong static int rx_queue_add_kobject(struct net_device *dev, int index) 9060a9627f2STom Herbert { 9076b53dafeSWANG Cong struct netdev_rx_queue *queue = dev->_rx + index; 9080a9627f2STom Herbert struct kobject *kobj = &queue->kobj; 9090a9627f2STom Herbert int error = 0; 9100a9627f2STom Herbert 9116b53dafeSWANG Cong kobj->kset = dev->queues_kset; 9120a9627f2STom Herbert error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, 9130a9627f2STom Herbert "rx-%u", index); 914a953be53SMichael Dalton if (error) 915a953be53SMichael Dalton goto exit; 916a953be53SMichael Dalton 9176b53dafeSWANG Cong if (dev->sysfs_rx_queue_group) { 9186b53dafeSWANG Cong error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group); 919a953be53SMichael Dalton if (error) 920a953be53SMichael Dalton goto exit; 9210a9627f2STom Herbert } 9220a9627f2STom Herbert 9230a9627f2STom Herbert kobject_uevent(kobj, KOBJ_ADD); 924fe822240STom Herbert dev_hold(queue->dev); 9250a9627f2STom Herbert 9260a9627f2STom Herbert return error; 927a953be53SMichael Dalton exit: 928a953be53SMichael Dalton kobject_put(kobj); 929a953be53SMichael Dalton return error; 9300a9627f2STom Herbert } 93180dd6eacSPaul Bolle #endif /* CONFIG_SYSFS */ 9320a9627f2STom Herbert 93362fe0b40SBen Hutchings int 9346b53dafeSWANG Cong net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) 9350a9627f2STom Herbert { 936a953be53SMichael Dalton #ifdef CONFIG_SYSFS 9370a9627f2STom Herbert int i; 9380a9627f2STom Herbert int error = 0; 9390a9627f2STom Herbert 940a953be53SMichael Dalton #ifndef CONFIG_RPS 9416b53dafeSWANG Cong if (!dev->sysfs_rx_queue_group) 942a953be53SMichael Dalton return 0; 943a953be53SMichael Dalton #endif 94462fe0b40SBen Hutchings for (i = old_num; i < new_num; i++) { 9456b53dafeSWANG Cong error = rx_queue_add_kobject(dev, i); 94662fe0b40SBen Hutchings if (error) { 94762fe0b40SBen Hutchings new_num = old_num; 9480a9627f2STom Herbert break; 9490a9627f2STom Herbert } 95062fe0b40SBen Hutchings } 9510a9627f2STom Herbert 952a953be53SMichael Dalton while (--i >= new_num) { 9536b53dafeSWANG Cong if (dev->sysfs_rx_queue_group) 9546b53dafeSWANG Cong sysfs_remove_group(&dev->_rx[i].kobj, 9556b53dafeSWANG Cong dev->sysfs_rx_queue_group); 9566b53dafeSWANG Cong kobject_put(&dev->_rx[i].kobj); 957a953be53SMichael Dalton } 9580a9627f2STom Herbert 9590a9627f2STom Herbert return error; 960bf264145STom Herbert #else 961bf264145STom Herbert return 0; 962bf264145STom Herbert #endif 9630a9627f2STom Herbert } 9640a9627f2STom Herbert 965ccf5ff69Sdavid decotigny #ifdef CONFIG_SYSFS 9661d24eb48STom Herbert /* 9671d24eb48STom Herbert * netdev_queue sysfs structures and functions. 9681d24eb48STom Herbert */ 9691d24eb48STom Herbert struct netdev_queue_attribute { 9701d24eb48STom Herbert struct attribute attr; 9711d24eb48STom Herbert ssize_t (*show)(struct netdev_queue *queue, 9721d24eb48STom Herbert struct netdev_queue_attribute *attr, char *buf); 9731d24eb48STom Herbert ssize_t (*store)(struct netdev_queue *queue, 9741d24eb48STom Herbert struct netdev_queue_attribute *attr, const char *buf, size_t len); 9751d24eb48STom Herbert }; 9761d24eb48STom Herbert #define to_netdev_queue_attr(_attr) container_of(_attr, \ 9771d24eb48STom Herbert struct netdev_queue_attribute, attr) 9781d24eb48STom Herbert 9791d24eb48STom Herbert #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) 9801d24eb48STom Herbert 9811d24eb48STom Herbert static ssize_t netdev_queue_attr_show(struct kobject *kobj, 9821d24eb48STom Herbert struct attribute *attr, char *buf) 98362fe0b40SBen Hutchings { 9841d24eb48STom Herbert struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); 9851d24eb48STom Herbert struct netdev_queue *queue = to_netdev_queue(kobj); 9861d24eb48STom Herbert 9871d24eb48STom Herbert if (!attribute->show) 9881d24eb48STom Herbert return -EIO; 9891d24eb48STom Herbert 9901d24eb48STom Herbert return attribute->show(queue, attribute, buf); 9911d24eb48STom Herbert } 9921d24eb48STom Herbert 9931d24eb48STom Herbert static ssize_t netdev_queue_attr_store(struct kobject *kobj, 9941d24eb48STom Herbert struct attribute *attr, 9951d24eb48STom Herbert const char *buf, size_t count) 9961d24eb48STom Herbert { 9971d24eb48STom Herbert struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); 9981d24eb48STom Herbert struct netdev_queue *queue = to_netdev_queue(kobj); 9991d24eb48STom Herbert 10001d24eb48STom Herbert if (!attribute->store) 10011d24eb48STom Herbert return -EIO; 10021d24eb48STom Herbert 10031d24eb48STom Herbert return attribute->store(queue, attribute, buf, count); 10041d24eb48STom Herbert } 10051d24eb48STom Herbert 10061d24eb48STom Herbert static const struct sysfs_ops netdev_queue_sysfs_ops = { 10071d24eb48STom Herbert .show = netdev_queue_attr_show, 10081d24eb48STom Herbert .store = netdev_queue_attr_store, 10091d24eb48STom Herbert }; 10101d24eb48STom Herbert 1011ccf5ff69Sdavid decotigny static ssize_t show_trans_timeout(struct netdev_queue *queue, 1012ccf5ff69Sdavid decotigny struct netdev_queue_attribute *attribute, 1013ccf5ff69Sdavid decotigny char *buf) 1014ccf5ff69Sdavid decotigny { 1015ccf5ff69Sdavid decotigny unsigned long trans_timeout; 1016ccf5ff69Sdavid decotigny 1017ccf5ff69Sdavid decotigny spin_lock_irq(&queue->_xmit_lock); 1018ccf5ff69Sdavid decotigny trans_timeout = queue->trans_timeout; 1019ccf5ff69Sdavid decotigny spin_unlock_irq(&queue->_xmit_lock); 1020ccf5ff69Sdavid decotigny 1021ccf5ff69Sdavid decotigny return sprintf(buf, "%lu", trans_timeout); 1022ccf5ff69Sdavid decotigny } 1023ccf5ff69Sdavid decotigny 1024822b3b2eSJohn Fastabend #ifdef CONFIG_XPS 1025c4047f53SThadeu Lima de Souza Cascardo static unsigned int get_netdev_queue_index(struct netdev_queue *queue) 1026822b3b2eSJohn Fastabend { 1027822b3b2eSJohn Fastabend struct net_device *dev = queue->dev; 1028c4047f53SThadeu Lima de Souza Cascardo unsigned int i; 1029822b3b2eSJohn Fastabend 1030c4047f53SThadeu Lima de Souza Cascardo i = queue - dev->_tx; 1031822b3b2eSJohn Fastabend BUG_ON(i >= dev->num_tx_queues); 1032822b3b2eSJohn Fastabend 1033822b3b2eSJohn Fastabend return i; 1034822b3b2eSJohn Fastabend } 1035822b3b2eSJohn Fastabend 1036822b3b2eSJohn Fastabend static ssize_t show_tx_maxrate(struct netdev_queue *queue, 1037822b3b2eSJohn Fastabend struct netdev_queue_attribute *attribute, 1038822b3b2eSJohn Fastabend char *buf) 1039822b3b2eSJohn Fastabend { 1040822b3b2eSJohn Fastabend return sprintf(buf, "%lu\n", queue->tx_maxrate); 1041822b3b2eSJohn Fastabend } 1042822b3b2eSJohn Fastabend 1043822b3b2eSJohn Fastabend static ssize_t set_tx_maxrate(struct netdev_queue *queue, 1044822b3b2eSJohn Fastabend struct netdev_queue_attribute *attribute, 1045822b3b2eSJohn Fastabend const char *buf, size_t len) 1046822b3b2eSJohn Fastabend { 1047822b3b2eSJohn Fastabend struct net_device *dev = queue->dev; 1048822b3b2eSJohn Fastabend int err, index = get_netdev_queue_index(queue); 1049822b3b2eSJohn Fastabend u32 rate = 0; 1050822b3b2eSJohn Fastabend 1051822b3b2eSJohn Fastabend err = kstrtou32(buf, 10, &rate); 1052822b3b2eSJohn Fastabend if (err < 0) 1053822b3b2eSJohn Fastabend return err; 1054822b3b2eSJohn Fastabend 1055822b3b2eSJohn Fastabend if (!rtnl_trylock()) 1056822b3b2eSJohn Fastabend return restart_syscall(); 1057822b3b2eSJohn Fastabend 1058822b3b2eSJohn Fastabend err = -EOPNOTSUPP; 1059822b3b2eSJohn Fastabend if (dev->netdev_ops->ndo_set_tx_maxrate) 1060822b3b2eSJohn Fastabend err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate); 1061822b3b2eSJohn Fastabend 1062822b3b2eSJohn Fastabend rtnl_unlock(); 1063822b3b2eSJohn Fastabend if (!err) { 1064822b3b2eSJohn Fastabend queue->tx_maxrate = rate; 1065822b3b2eSJohn Fastabend return len; 1066822b3b2eSJohn Fastabend } 1067822b3b2eSJohn Fastabend return err; 1068822b3b2eSJohn Fastabend } 1069822b3b2eSJohn Fastabend 1070822b3b2eSJohn Fastabend static struct netdev_queue_attribute queue_tx_maxrate = 1071822b3b2eSJohn Fastabend __ATTR(tx_maxrate, S_IRUGO | S_IWUSR, 1072822b3b2eSJohn Fastabend show_tx_maxrate, set_tx_maxrate); 1073822b3b2eSJohn Fastabend #endif 1074822b3b2eSJohn Fastabend 1075ccf5ff69Sdavid decotigny static struct netdev_queue_attribute queue_trans_timeout = 1076ccf5ff69Sdavid decotigny __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL); 1077ccf5ff69Sdavid decotigny 1078114cf580STom Herbert #ifdef CONFIG_BQL 1079114cf580STom Herbert /* 1080114cf580STom Herbert * Byte queue limits sysfs structures and functions. 1081114cf580STom Herbert */ 1082114cf580STom Herbert static ssize_t bql_show(char *buf, unsigned int value) 1083114cf580STom Herbert { 1084114cf580STom Herbert return sprintf(buf, "%u\n", value); 1085114cf580STom Herbert } 1086114cf580STom Herbert 1087114cf580STom Herbert static ssize_t bql_set(const char *buf, const size_t count, 1088114cf580STom Herbert unsigned int *pvalue) 1089114cf580STom Herbert { 1090114cf580STom Herbert unsigned int value; 1091114cf580STom Herbert int err; 1092114cf580STom Herbert 1093114cf580STom Herbert if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) 1094114cf580STom Herbert value = DQL_MAX_LIMIT; 1095114cf580STom Herbert else { 1096114cf580STom Herbert err = kstrtouint(buf, 10, &value); 1097114cf580STom Herbert if (err < 0) 1098114cf580STom Herbert return err; 1099114cf580STom Herbert if (value > DQL_MAX_LIMIT) 1100114cf580STom Herbert return -EINVAL; 1101114cf580STom Herbert } 1102114cf580STom Herbert 1103114cf580STom Herbert *pvalue = value; 1104114cf580STom Herbert 1105114cf580STom Herbert return count; 1106114cf580STom Herbert } 1107114cf580STom Herbert 1108114cf580STom Herbert static ssize_t bql_show_hold_time(struct netdev_queue *queue, 1109114cf580STom Herbert struct netdev_queue_attribute *attr, 1110114cf580STom Herbert char *buf) 1111114cf580STom Herbert { 1112114cf580STom Herbert struct dql *dql = &queue->dql; 1113114cf580STom Herbert 1114114cf580STom Herbert return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); 1115114cf580STom Herbert } 1116114cf580STom Herbert 1117114cf580STom Herbert static ssize_t bql_set_hold_time(struct netdev_queue *queue, 1118114cf580STom Herbert struct netdev_queue_attribute *attribute, 1119114cf580STom Herbert const char *buf, size_t len) 1120114cf580STom Herbert { 1121114cf580STom Herbert struct dql *dql = &queue->dql; 112295c96174SEric Dumazet unsigned int value; 1123114cf580STom Herbert int err; 1124114cf580STom Herbert 1125114cf580STom Herbert err = kstrtouint(buf, 10, &value); 1126114cf580STom Herbert if (err < 0) 1127114cf580STom Herbert return err; 1128114cf580STom Herbert 1129114cf580STom Herbert dql->slack_hold_time = msecs_to_jiffies(value); 1130114cf580STom Herbert 1131114cf580STom Herbert return len; 1132114cf580STom Herbert } 1133114cf580STom Herbert 1134114cf580STom Herbert static struct netdev_queue_attribute bql_hold_time_attribute = 1135114cf580STom Herbert __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time, 1136114cf580STom Herbert bql_set_hold_time); 1137114cf580STom Herbert 1138114cf580STom Herbert static ssize_t bql_show_inflight(struct netdev_queue *queue, 1139114cf580STom Herbert struct netdev_queue_attribute *attr, 1140114cf580STom Herbert char *buf) 1141114cf580STom Herbert { 1142114cf580STom Herbert struct dql *dql = &queue->dql; 1143114cf580STom Herbert 1144114cf580STom Herbert return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); 1145114cf580STom Herbert } 1146114cf580STom Herbert 1147114cf580STom Herbert static struct netdev_queue_attribute bql_inflight_attribute = 1148795d9a25SHiroaki SHIMODA __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL); 1149114cf580STom Herbert 1150114cf580STom Herbert #define BQL_ATTR(NAME, FIELD) \ 1151114cf580STom Herbert static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ 1152114cf580STom Herbert struct netdev_queue_attribute *attr, \ 1153114cf580STom Herbert char *buf) \ 1154114cf580STom Herbert { \ 1155114cf580STom Herbert return bql_show(buf, queue->dql.FIELD); \ 1156114cf580STom Herbert } \ 1157114cf580STom Herbert \ 1158114cf580STom Herbert static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ 1159114cf580STom Herbert struct netdev_queue_attribute *attr, \ 1160114cf580STom Herbert const char *buf, size_t len) \ 1161114cf580STom Herbert { \ 1162114cf580STom Herbert return bql_set(buf, len, &queue->dql.FIELD); \ 1163114cf580STom Herbert } \ 1164114cf580STom Herbert \ 1165114cf580STom Herbert static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \ 1166114cf580STom Herbert __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \ 1167114cf580STom Herbert bql_set_ ## NAME); 1168114cf580STom Herbert 1169114cf580STom Herbert BQL_ATTR(limit, limit) 1170114cf580STom Herbert BQL_ATTR(limit_max, max_limit) 1171114cf580STom Herbert BQL_ATTR(limit_min, min_limit) 1172114cf580STom Herbert 1173114cf580STom Herbert static struct attribute *dql_attrs[] = { 1174114cf580STom Herbert &bql_limit_attribute.attr, 1175114cf580STom Herbert &bql_limit_max_attribute.attr, 1176114cf580STom Herbert &bql_limit_min_attribute.attr, 1177114cf580STom Herbert &bql_hold_time_attribute.attr, 1178114cf580STom Herbert &bql_inflight_attribute.attr, 1179114cf580STom Herbert NULL 1180114cf580STom Herbert }; 1181114cf580STom Herbert 1182114cf580STom Herbert static struct attribute_group dql_group = { 1183114cf580STom Herbert .name = "byte_queue_limits", 1184114cf580STom Herbert .attrs = dql_attrs, 1185114cf580STom Herbert }; 1186114cf580STom Herbert #endif /* CONFIG_BQL */ 1187114cf580STom Herbert 1188ccf5ff69Sdavid decotigny #ifdef CONFIG_XPS 11891d24eb48STom Herbert static ssize_t show_xps_map(struct netdev_queue *queue, 11901d24eb48STom Herbert struct netdev_queue_attribute *attribute, char *buf) 11911d24eb48STom Herbert { 11921d24eb48STom Herbert struct net_device *dev = queue->dev; 11931d24eb48STom Herbert struct xps_dev_maps *dev_maps; 11941d24eb48STom Herbert cpumask_var_t mask; 11951d24eb48STom Herbert unsigned long index; 1196f0906827STejun Heo int i, len; 11971d24eb48STom Herbert 11981d24eb48STom Herbert if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) 11991d24eb48STom Herbert return -ENOMEM; 12001d24eb48STom Herbert 12011d24eb48STom Herbert index = get_netdev_queue_index(queue); 12021d24eb48STom Herbert 12031d24eb48STom Herbert rcu_read_lock(); 12041d24eb48STom Herbert dev_maps = rcu_dereference(dev->xps_maps); 12051d24eb48STom Herbert if (dev_maps) { 12061d24eb48STom Herbert for_each_possible_cpu(i) { 12071d24eb48STom Herbert struct xps_map *map = 12081d24eb48STom Herbert rcu_dereference(dev_maps->cpu_map[i]); 12091d24eb48STom Herbert if (map) { 12101d24eb48STom Herbert int j; 12111d24eb48STom Herbert for (j = 0; j < map->len; j++) { 12121d24eb48STom Herbert if (map->queues[j] == index) { 12131d24eb48STom Herbert cpumask_set_cpu(i, mask); 12141d24eb48STom Herbert break; 12151d24eb48STom Herbert } 12161d24eb48STom Herbert } 12171d24eb48STom Herbert } 12181d24eb48STom Herbert } 12191d24eb48STom Herbert } 12201d24eb48STom Herbert rcu_read_unlock(); 12211d24eb48STom Herbert 1222f0906827STejun Heo len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); 12231d24eb48STom Herbert free_cpumask_var(mask); 1224f0906827STejun Heo return len < PAGE_SIZE ? len : -EINVAL; 12251d24eb48STom Herbert } 12261d24eb48STom Herbert 12271d24eb48STom Herbert static ssize_t store_xps_map(struct netdev_queue *queue, 12281d24eb48STom Herbert struct netdev_queue_attribute *attribute, 12291d24eb48STom Herbert const char *buf, size_t len) 12301d24eb48STom Herbert { 12311d24eb48STom Herbert struct net_device *dev = queue->dev; 12321d24eb48STom Herbert unsigned long index; 1233537c00deSAlexander Duyck cpumask_var_t mask; 1234537c00deSAlexander Duyck int err; 12351d24eb48STom Herbert 12361d24eb48STom Herbert if (!capable(CAP_NET_ADMIN)) 12371d24eb48STom Herbert return -EPERM; 12381d24eb48STom Herbert 12391d24eb48STom Herbert if (!alloc_cpumask_var(&mask, GFP_KERNEL)) 12401d24eb48STom Herbert return -ENOMEM; 12411d24eb48STom Herbert 12421d24eb48STom Herbert index = get_netdev_queue_index(queue); 12431d24eb48STom Herbert 12441d24eb48STom Herbert err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); 12451d24eb48STom Herbert if (err) { 12461d24eb48STom Herbert free_cpumask_var(mask); 12471d24eb48STom Herbert return err; 12481d24eb48STom Herbert } 12491d24eb48STom Herbert 1250537c00deSAlexander Duyck err = netif_set_xps_queue(dev, mask, index); 12511d24eb48STom Herbert 12521d24eb48STom Herbert free_cpumask_var(mask); 12531d24eb48STom Herbert 1254537c00deSAlexander Duyck return err ? : len; 12551d24eb48STom Herbert } 12561d24eb48STom Herbert 12571d24eb48STom Herbert static struct netdev_queue_attribute xps_cpus_attribute = 12581d24eb48STom Herbert __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); 1259ccf5ff69Sdavid decotigny #endif /* CONFIG_XPS */ 12601d24eb48STom Herbert 12611d24eb48STom Herbert static struct attribute *netdev_queue_default_attrs[] = { 1262ccf5ff69Sdavid decotigny &queue_trans_timeout.attr, 1263ccf5ff69Sdavid decotigny #ifdef CONFIG_XPS 12641d24eb48STom Herbert &xps_cpus_attribute.attr, 1265822b3b2eSJohn Fastabend &queue_tx_maxrate.attr, 1266ccf5ff69Sdavid decotigny #endif 12671d24eb48STom Herbert NULL 12681d24eb48STom Herbert }; 12691d24eb48STom Herbert 12701d24eb48STom Herbert static void netdev_queue_release(struct kobject *kobj) 12711d24eb48STom Herbert { 12721d24eb48STom Herbert struct netdev_queue *queue = to_netdev_queue(kobj); 12731d24eb48STom Herbert 12741d24eb48STom Herbert memset(kobj, 0, sizeof(*kobj)); 12751d24eb48STom Herbert dev_put(queue->dev); 12761d24eb48STom Herbert } 12771d24eb48STom Herbert 127882ef3d5dSWeilong Chen static const void *netdev_queue_namespace(struct kobject *kobj) 127982ef3d5dSWeilong Chen { 128082ef3d5dSWeilong Chen struct netdev_queue *queue = to_netdev_queue(kobj); 128182ef3d5dSWeilong Chen struct device *dev = &queue->dev->dev; 128282ef3d5dSWeilong Chen const void *ns = NULL; 128382ef3d5dSWeilong Chen 128482ef3d5dSWeilong Chen if (dev->class && dev->class->ns_type) 128582ef3d5dSWeilong Chen ns = dev->class->namespace(dev); 128682ef3d5dSWeilong Chen 128782ef3d5dSWeilong Chen return ns; 128882ef3d5dSWeilong Chen } 128982ef3d5dSWeilong Chen 12901d24eb48STom Herbert static struct kobj_type netdev_queue_ktype = { 12911d24eb48STom Herbert .sysfs_ops = &netdev_queue_sysfs_ops, 12921d24eb48STom Herbert .release = netdev_queue_release, 12931d24eb48STom Herbert .default_attrs = netdev_queue_default_attrs, 129482ef3d5dSWeilong Chen .namespace = netdev_queue_namespace, 12951d24eb48STom Herbert }; 12961d24eb48STom Herbert 12976b53dafeSWANG Cong static int netdev_queue_add_kobject(struct net_device *dev, int index) 12981d24eb48STom Herbert { 12996b53dafeSWANG Cong struct netdev_queue *queue = dev->_tx + index; 13001d24eb48STom Herbert struct kobject *kobj = &queue->kobj; 13011d24eb48STom Herbert int error = 0; 13021d24eb48STom Herbert 13036b53dafeSWANG Cong kobj->kset = dev->queues_kset; 13041d24eb48STom Herbert error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, 13051d24eb48STom Herbert "tx-%u", index); 1306114cf580STom Herbert if (error) 1307114cf580STom Herbert goto exit; 1308114cf580STom Herbert 1309114cf580STom Herbert #ifdef CONFIG_BQL 1310114cf580STom Herbert error = sysfs_create_group(kobj, &dql_group); 1311114cf580STom Herbert if (error) 1312114cf580STom Herbert goto exit; 1313114cf580STom Herbert #endif 13141d24eb48STom Herbert 13151d24eb48STom Herbert kobject_uevent(kobj, KOBJ_ADD); 13161d24eb48STom Herbert dev_hold(queue->dev); 13171d24eb48STom Herbert 1318114cf580STom Herbert return 0; 1319114cf580STom Herbert exit: 1320114cf580STom Herbert kobject_put(kobj); 13211d24eb48STom Herbert return error; 13221d24eb48STom Herbert } 1323ccf5ff69Sdavid decotigny #endif /* CONFIG_SYSFS */ 13241d24eb48STom Herbert 13251d24eb48STom Herbert int 13266b53dafeSWANG Cong netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) 13271d24eb48STom Herbert { 1328ccf5ff69Sdavid decotigny #ifdef CONFIG_SYSFS 13291d24eb48STom Herbert int i; 13301d24eb48STom Herbert int error = 0; 13311d24eb48STom Herbert 13321d24eb48STom Herbert for (i = old_num; i < new_num; i++) { 13336b53dafeSWANG Cong error = netdev_queue_add_kobject(dev, i); 13341d24eb48STom Herbert if (error) { 13351d24eb48STom Herbert new_num = old_num; 13361d24eb48STom Herbert break; 13371d24eb48STom Herbert } 13381d24eb48STom Herbert } 13391d24eb48STom Herbert 1340114cf580STom Herbert while (--i >= new_num) { 13416b53dafeSWANG Cong struct netdev_queue *queue = dev->_tx + i; 1342114cf580STom Herbert 1343114cf580STom Herbert #ifdef CONFIG_BQL 1344114cf580STom Herbert sysfs_remove_group(&queue->kobj, &dql_group); 1345114cf580STom Herbert #endif 1346114cf580STom Herbert kobject_put(&queue->kobj); 1347114cf580STom Herbert } 13481d24eb48STom Herbert 13491d24eb48STom Herbert return error; 1350bf264145STom Herbert #else 1351bf264145STom Herbert return 0; 1352ccf5ff69Sdavid decotigny #endif /* CONFIG_SYSFS */ 13531d24eb48STom Herbert } 13541d24eb48STom Herbert 13556b53dafeSWANG Cong static int register_queue_kobjects(struct net_device *dev) 13561d24eb48STom Herbert { 1357bf264145STom Herbert int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; 13581d24eb48STom Herbert 1359ccf5ff69Sdavid decotigny #ifdef CONFIG_SYSFS 13606b53dafeSWANG Cong dev->queues_kset = kset_create_and_add("queues", 13616b53dafeSWANG Cong NULL, &dev->dev.kobj); 13626b53dafeSWANG Cong if (!dev->queues_kset) 136362fe0b40SBen Hutchings return -ENOMEM; 13646b53dafeSWANG Cong real_rx = dev->real_num_rx_queues; 1365bf264145STom Herbert #endif 13666b53dafeSWANG Cong real_tx = dev->real_num_tx_queues; 1367bf264145STom Herbert 13686b53dafeSWANG Cong error = net_rx_queue_update_kobjects(dev, 0, real_rx); 13691d24eb48STom Herbert if (error) 13701d24eb48STom Herbert goto error; 1371bf264145STom Herbert rxq = real_rx; 13721d24eb48STom Herbert 13736b53dafeSWANG Cong error = netdev_queue_update_kobjects(dev, 0, real_tx); 13741d24eb48STom Herbert if (error) 13751d24eb48STom Herbert goto error; 1376bf264145STom Herbert txq = real_tx; 13771d24eb48STom Herbert 13781d24eb48STom Herbert return 0; 13791d24eb48STom Herbert 13801d24eb48STom Herbert error: 13816b53dafeSWANG Cong netdev_queue_update_kobjects(dev, txq, 0); 13826b53dafeSWANG Cong net_rx_queue_update_kobjects(dev, rxq, 0); 13831d24eb48STom Herbert return error; 138462fe0b40SBen Hutchings } 138562fe0b40SBen Hutchings 13866b53dafeSWANG Cong static void remove_queue_kobjects(struct net_device *dev) 13870a9627f2STom Herbert { 1388bf264145STom Herbert int real_rx = 0, real_tx = 0; 1389bf264145STom Herbert 1390a953be53SMichael Dalton #ifdef CONFIG_SYSFS 13916b53dafeSWANG Cong real_rx = dev->real_num_rx_queues; 1392bf264145STom Herbert #endif 13936b53dafeSWANG Cong real_tx = dev->real_num_tx_queues; 1394bf264145STom Herbert 13956b53dafeSWANG Cong net_rx_queue_update_kobjects(dev, real_rx, 0); 13966b53dafeSWANG Cong netdev_queue_update_kobjects(dev, real_tx, 0); 1397ccf5ff69Sdavid decotigny #ifdef CONFIG_SYSFS 13986b53dafeSWANG Cong kset_unregister(dev->queues_kset); 1399bf264145STom Herbert #endif 14000a9627f2STom Herbert } 1401608b4b95SEric W. Biederman 14027dc5dbc8SEric W. Biederman static bool net_current_may_mount(void) 14037dc5dbc8SEric W. Biederman { 14047dc5dbc8SEric W. Biederman struct net *net = current->nsproxy->net_ns; 14057dc5dbc8SEric W. Biederman 14067dc5dbc8SEric W. Biederman return ns_capable(net->user_ns, CAP_SYS_ADMIN); 14077dc5dbc8SEric W. Biederman } 14087dc5dbc8SEric W. Biederman 1409a685e089SAl Viro static void *net_grab_current_ns(void) 1410608b4b95SEric W. Biederman { 1411a685e089SAl Viro struct net *ns = current->nsproxy->net_ns; 1412a685e089SAl Viro #ifdef CONFIG_NET_NS 1413a685e089SAl Viro if (ns) 1414a685e089SAl Viro atomic_inc(&ns->passive); 1415a685e089SAl Viro #endif 1416a685e089SAl Viro return ns; 1417608b4b95SEric W. Biederman } 1418608b4b95SEric W. Biederman 1419608b4b95SEric W. Biederman static const void *net_initial_ns(void) 1420608b4b95SEric W. Biederman { 1421608b4b95SEric W. Biederman return &init_net; 1422608b4b95SEric W. Biederman } 1423608b4b95SEric W. Biederman 1424608b4b95SEric W. Biederman static const void *net_netlink_ns(struct sock *sk) 1425608b4b95SEric W. Biederman { 1426608b4b95SEric W. Biederman return sock_net(sk); 1427608b4b95SEric W. Biederman } 1428608b4b95SEric W. Biederman 142904600794SJohannes Berg struct kobj_ns_type_operations net_ns_type_operations = { 1430608b4b95SEric W. Biederman .type = KOBJ_NS_TYPE_NET, 14317dc5dbc8SEric W. Biederman .current_may_mount = net_current_may_mount, 1432a685e089SAl Viro .grab_current_ns = net_grab_current_ns, 1433608b4b95SEric W. Biederman .netlink_ns = net_netlink_ns, 1434608b4b95SEric W. Biederman .initial_ns = net_initial_ns, 1435a685e089SAl Viro .drop_ns = net_drop_ns, 1436608b4b95SEric W. Biederman }; 143704600794SJohannes Berg EXPORT_SYMBOL_GPL(net_ns_type_operations); 1438608b4b95SEric W. Biederman 14397eff2e7aSKay Sievers static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) 14401da177e4SLinus Torvalds { 144143cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 14427eff2e7aSKay Sievers int retval; 14431da177e4SLinus Torvalds 1444312c004dSKay Sievers /* pass interface to uevent. */ 14457eff2e7aSKay Sievers retval = add_uevent_var(env, "INTERFACE=%s", dev->name); 1446bf62456eSEric Rannaud if (retval) 1447bf62456eSEric Rannaud goto exit; 14481da177e4SLinus Torvalds 1449ca2f37dbSJean Tourrilhes /* pass ifindex to uevent. 1450ca2f37dbSJean Tourrilhes * ifindex is useful as it won't change (interface name may change) 1451ca2f37dbSJean Tourrilhes * and is what RtNetlink uses natively. */ 14527eff2e7aSKay Sievers retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); 1453ca2f37dbSJean Tourrilhes 1454bf62456eSEric Rannaud exit: 1455bf62456eSEric Rannaud return retval; 14561da177e4SLinus Torvalds } 14571da177e4SLinus Torvalds 14581da177e4SLinus Torvalds /* 14591da177e4SLinus Torvalds * netdev_release -- destroy and free a dead device. 146043cb76d9SGreg Kroah-Hartman * Called when last reference to device kobject is gone. 14611da177e4SLinus Torvalds */ 146243cb76d9SGreg Kroah-Hartman static void netdev_release(struct device *d) 14631da177e4SLinus Torvalds { 146443cb76d9SGreg Kroah-Hartman struct net_device *dev = to_net_dev(d); 14651da177e4SLinus Torvalds 14661da177e4SLinus Torvalds BUG_ON(dev->reg_state != NETREG_RELEASED); 14671da177e4SLinus Torvalds 14680b815a1aSStephen Hemminger kfree(dev->ifalias); 146974d332c1SEric Dumazet netdev_freemem(dev); 14701da177e4SLinus Torvalds } 14711da177e4SLinus Torvalds 1472608b4b95SEric W. Biederman static const void *net_namespace(struct device *d) 1473608b4b95SEric W. Biederman { 14745c29482dSGeliang Tang struct net_device *dev = to_net_dev(d); 14755c29482dSGeliang Tang 1476608b4b95SEric W. Biederman return dev_net(dev); 1477608b4b95SEric W. Biederman } 1478608b4b95SEric W. Biederman 14791da177e4SLinus Torvalds static struct class net_class = { 14801da177e4SLinus Torvalds .name = "net", 148143cb76d9SGreg Kroah-Hartman .dev_release = netdev_release, 14826be8aeefSGreg Kroah-Hartman .dev_groups = net_class_groups, 148343cb76d9SGreg Kroah-Hartman .dev_uevent = netdev_uevent, 1484608b4b95SEric W. Biederman .ns_type = &net_ns_type_operations, 1485608b4b95SEric W. Biederman .namespace = net_namespace, 14861da177e4SLinus Torvalds }; 14871da177e4SLinus Torvalds 1488aa836df9SFlorian Fainelli #ifdef CONFIG_OF_NET 1489aa836df9SFlorian Fainelli static int of_dev_node_match(struct device *dev, const void *data) 1490aa836df9SFlorian Fainelli { 1491aa836df9SFlorian Fainelli int ret = 0; 1492aa836df9SFlorian Fainelli 1493aa836df9SFlorian Fainelli if (dev->parent) 1494aa836df9SFlorian Fainelli ret = dev->parent->of_node == data; 1495aa836df9SFlorian Fainelli 1496aa836df9SFlorian Fainelli return ret == 0 ? dev->of_node == data : ret; 1497aa836df9SFlorian Fainelli } 1498aa836df9SFlorian Fainelli 14999861f720SRussell King /* 15009861f720SRussell King * of_find_net_device_by_node - lookup the net device for the device node 15019861f720SRussell King * @np: OF device node 15029861f720SRussell King * 15039861f720SRussell King * Looks up the net_device structure corresponding with the device node. 15049861f720SRussell King * If successful, returns a pointer to the net_device with the embedded 15059861f720SRussell King * struct device refcount incremented by one, or NULL on failure. The 15069861f720SRussell King * refcount must be dropped when done with the net_device. 15079861f720SRussell King */ 1508aa836df9SFlorian Fainelli struct net_device *of_find_net_device_by_node(struct device_node *np) 1509aa836df9SFlorian Fainelli { 1510aa836df9SFlorian Fainelli struct device *dev; 1511aa836df9SFlorian Fainelli 1512aa836df9SFlorian Fainelli dev = class_find_device(&net_class, NULL, np, of_dev_node_match); 1513aa836df9SFlorian Fainelli if (!dev) 1514aa836df9SFlorian Fainelli return NULL; 1515aa836df9SFlorian Fainelli 1516aa836df9SFlorian Fainelli return to_net_dev(dev); 1517aa836df9SFlorian Fainelli } 1518aa836df9SFlorian Fainelli EXPORT_SYMBOL(of_find_net_device_by_node); 1519aa836df9SFlorian Fainelli #endif 1520aa836df9SFlorian Fainelli 15219093bbb2SStephen Hemminger /* Delete sysfs entries but hold kobject reference until after all 15229093bbb2SStephen Hemminger * netdev references are gone. 15239093bbb2SStephen Hemminger */ 15246b53dafeSWANG Cong void netdev_unregister_kobject(struct net_device *ndev) 15251da177e4SLinus Torvalds { 15266b53dafeSWANG Cong struct device *dev = &(ndev->dev); 15279093bbb2SStephen Hemminger 15289093bbb2SStephen Hemminger kobject_get(&dev->kobj); 15293891845eSEric W. Biederman 15306b53dafeSWANG Cong remove_queue_kobjects(ndev); 15310a9627f2STom Herbert 15329802c8e2SMing Lei pm_runtime_set_memalloc_noio(dev, false); 15339802c8e2SMing Lei 15349093bbb2SStephen Hemminger device_del(dev); 15351da177e4SLinus Torvalds } 15361da177e4SLinus Torvalds 15371da177e4SLinus Torvalds /* Create sysfs entries for network device. */ 15386b53dafeSWANG Cong int netdev_register_kobject(struct net_device *ndev) 15391da177e4SLinus Torvalds { 15406b53dafeSWANG Cong struct device *dev = &(ndev->dev); 15416b53dafeSWANG Cong const struct attribute_group **groups = ndev->sysfs_groups; 15420a9627f2STom Herbert int error = 0; 15431da177e4SLinus Torvalds 1544a1b3f594SEric W. Biederman device_initialize(dev); 154543cb76d9SGreg Kroah-Hartman dev->class = &net_class; 15466b53dafeSWANG Cong dev->platform_data = ndev; 154743cb76d9SGreg Kroah-Hartman dev->groups = groups; 15481da177e4SLinus Torvalds 15496b53dafeSWANG Cong dev_set_name(dev, "%s", ndev->name); 15501da177e4SLinus Torvalds 15518b41d188SEric W. Biederman #ifdef CONFIG_SYSFS 15520c509a6cSEric W. Biederman /* Allow for a device specific group */ 15530c509a6cSEric W. Biederman if (*groups) 15540c509a6cSEric W. Biederman groups++; 15551da177e4SLinus Torvalds 15560c509a6cSEric W. Biederman *groups++ = &netstat_group; 155738c1a01cSJohannes Berg 155838c1a01cSJohannes Berg #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) 15596b53dafeSWANG Cong if (ndev->ieee80211_ptr) 156038c1a01cSJohannes Berg *groups++ = &wireless_group; 156138c1a01cSJohannes Berg #if IS_ENABLED(CONFIG_WIRELESS_EXT) 15626b53dafeSWANG Cong else if (ndev->wireless_handlers) 156338c1a01cSJohannes Berg *groups++ = &wireless_group; 156438c1a01cSJohannes Berg #endif 156538c1a01cSJohannes Berg #endif 15668b41d188SEric W. Biederman #endif /* CONFIG_SYSFS */ 15671da177e4SLinus Torvalds 15680a9627f2STom Herbert error = device_add(dev); 15690a9627f2STom Herbert if (error) 15700a9627f2STom Herbert return error; 15710a9627f2STom Herbert 15726b53dafeSWANG Cong error = register_queue_kobjects(ndev); 15730a9627f2STom Herbert if (error) { 15740a9627f2STom Herbert device_del(dev); 15750a9627f2STom Herbert return error; 15760a9627f2STom Herbert } 15770a9627f2STom Herbert 15789802c8e2SMing Lei pm_runtime_set_memalloc_noio(dev, true); 15799802c8e2SMing Lei 15800a9627f2STom Herbert return error; 15811da177e4SLinus Torvalds } 15821da177e4SLinus Torvalds 158358292cbeSTejun Heo int netdev_class_create_file_ns(struct class_attribute *class_attr, 158458292cbeSTejun Heo const void *ns) 1585b8a9787eSJay Vosburgh { 158658292cbeSTejun Heo return class_create_file_ns(&net_class, class_attr, ns); 1587b8a9787eSJay Vosburgh } 158858292cbeSTejun Heo EXPORT_SYMBOL(netdev_class_create_file_ns); 1589b8a9787eSJay Vosburgh 159058292cbeSTejun Heo void netdev_class_remove_file_ns(struct class_attribute *class_attr, 159158292cbeSTejun Heo const void *ns) 1592b8a9787eSJay Vosburgh { 159358292cbeSTejun Heo class_remove_file_ns(&net_class, class_attr, ns); 1594b8a9787eSJay Vosburgh } 159558292cbeSTejun Heo EXPORT_SYMBOL(netdev_class_remove_file_ns); 1596b8a9787eSJay Vosburgh 1597a48d4bb0SDaniel Borkmann int __init netdev_kobject_init(void) 15981da177e4SLinus Torvalds { 1599608b4b95SEric W. Biederman kobj_ns_type_register(&net_ns_type_operations); 16001da177e4SLinus Torvalds return class_register(&net_class); 16011da177e4SLinus Torvalds } 1602