^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * NET3 IP device support routines.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Derived from the IP parts of dev.c 1.0.19
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Authors: Ross Biro
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Mark Evans, <evansmp@uhura.aston.ac.uk>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Additional Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Alan Cox, <gw4pts@gw4pts.ampr.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Changes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * Alexey Kuznetsov: pa_* fields are replaced with ifaddr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * lists.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Cyrus Durgin: updated for kmod
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Matthias Andree: in devinet_ioctl, compare label and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * address (4.4BSD alias style support),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * fall back to comparing just the label
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * if no match found.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/capability.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/sockios.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/if_addr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <linux/if_ether.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <linux/inet.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <linux/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include <linux/inetdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <linux/igmp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include <linux/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #include <linux/sysctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include <linux/kmod.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #include <linux/netconf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #include <net/arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #include <net/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #include <net/route.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #include <net/ip_fib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #include <net/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #include <net/addrconf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define IPV6ONLY_FLAGS \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) (IFA_F_NODAD | IFA_F_OPTIMISTIC | IFA_F_DADFAILED | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) IFA_F_HOMEADDRESS | IFA_F_TENTATIVE | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) IFA_F_MANAGETEMPADDR | IFA_F_STABLE_PRIVACY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static struct ipv4_devconf ipv4_devconf = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) .data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) [IPV4_DEVCONF_ACCEPT_REDIRECTS - 1] = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) [IPV4_DEVCONF_SEND_REDIRECTS - 1] = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) [IPV4_DEVCONF_SECURE_REDIRECTS - 1] = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) [IPV4_DEVCONF_SHARED_MEDIA - 1] = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) [IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL - 1] = 10000 /*ms*/,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) [IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL - 1] = 1000 /*ms*/,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static struct ipv4_devconf ipv4_devconf_dflt = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) [IPV4_DEVCONF_ACCEPT_REDIRECTS - 1] = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) [IPV4_DEVCONF_SEND_REDIRECTS - 1] = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) [IPV4_DEVCONF_SECURE_REDIRECTS - 1] = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) [IPV4_DEVCONF_SHARED_MEDIA - 1] = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) [IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE - 1] = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) [IPV4_DEVCONF_IGMPV2_UNSOLICITED_REPORT_INTERVAL - 1] = 10000 /*ms*/,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) [IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL - 1] = 1000 /*ms*/,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #define IPV4_DEVCONF_DFLT(net, attr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) IPV4_DEVCONF((*net->ipv4.devconf_dflt), attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) static const struct nla_policy ifa_ipv4_policy[IFA_MAX+1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) [IFA_LOCAL] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) [IFA_ADDRESS] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) [IFA_BROADCAST] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) [IFA_LABEL] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) [IFA_FLAGS] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) [IFA_RT_PRIORITY] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) [IFA_TARGET_NETNSID] = { .type = NLA_S32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct inet_fill_args {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) u32 portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) u32 seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) int event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) unsigned int flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) int netnsid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) int ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define IN4_ADDR_HSIZE_SHIFT 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #define IN4_ADDR_HSIZE (1U << IN4_ADDR_HSIZE_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static struct hlist_head inet_addr_lst[IN4_ADDR_HSIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static u32 inet_addr_hash(const struct net *net, __be32 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) u32 val = (__force u32) addr ^ net_hash_mix(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return hash_32(val, IN4_ADDR_HSIZE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static void inet_hash_insert(struct net *net, struct in_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) u32 hash = inet_addr_hash(net, ifa->ifa_local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) hlist_add_head_rcu(&ifa->hash, &inet_addr_lst[hash]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static void inet_hash_remove(struct in_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) hlist_del_init_rcu(&ifa->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * __ip_dev_find - find the first device with a given source address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * @net: the net namespace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * @addr: the source address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * @devref: if true, take a reference on the found device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * If a caller uses devref=false, it should be protected by RCU, or RTNL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct net_device *result = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) ifa = inet_lookup_ifaddr_rcu(net, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (!ifa) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct flowi4 fl4 = { .daddr = addr };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct fib_result res = { 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct fib_table *local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /* Fallback to FIB local table so that communication
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * over loopback subnets work.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) local = fib_get_table(net, RT_TABLE_LOCAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (local &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) !fib_table_lookup(local, &fl4, &res, FIB_LOOKUP_NOREF) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) res.type == RTN_LOCAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) result = FIB_RES_DEV(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) result = ifa->ifa_dev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (result && devref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) dev_hold(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) EXPORT_SYMBOL(__ip_dev_find);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /* called under RCU lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) struct in_ifaddr *inet_lookup_ifaddr_rcu(struct net *net, __be32 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) u32 hash = inet_addr_hash(net, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) hlist_for_each_entry_rcu(ifa, &inet_addr_lst[hash], hash)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (ifa->ifa_local == addr &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) net_eq(dev_net(ifa->ifa_dev->dev), net))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static void rtmsg_ifa(int event, struct in_ifaddr *, struct nlmsghdr *, u32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static BLOCKING_NOTIFIER_HEAD(inetaddr_chain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static BLOCKING_NOTIFIER_HEAD(inetaddr_validator_chain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) static void inet_del_ifa(struct in_device *in_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct in_ifaddr __rcu **ifap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) int destroy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static int devinet_sysctl_register(struct in_device *idev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static void devinet_sysctl_unregister(struct in_device *idev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static int devinet_sysctl_register(struct in_device *idev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static void devinet_sysctl_unregister(struct in_device *idev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) /* Locks all the inet devices. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static struct in_ifaddr *inet_alloc_ifa(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) return kzalloc(sizeof(struct in_ifaddr), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) static void inet_rcu_free_ifa(struct rcu_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) struct in_ifaddr *ifa = container_of(head, struct in_ifaddr, rcu_head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (ifa->ifa_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) in_dev_put(ifa->ifa_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) kfree(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) static void inet_free_ifa(struct in_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) call_rcu(&ifa->rcu_head, inet_rcu_free_ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) void in_dev_finish_destroy(struct in_device *idev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) struct net_device *dev = idev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) WARN_ON(idev->ifa_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) WARN_ON(idev->mc_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) kfree(rcu_dereference_protected(idev->mc_hash, 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) #ifdef NET_REFCNT_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) pr_debug("%s: %p=%s\n", __func__, idev, dev ? dev->name : "NIL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) dev_put(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) if (!idev->dead)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) pr_err("Freeing alive in_device %p\n", idev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) kfree(idev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) EXPORT_SYMBOL(in_dev_finish_destroy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) static struct in_device *inetdev_init(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) int err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) in_dev = kzalloc(sizeof(*in_dev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) memcpy(&in_dev->cnf, dev_net(dev)->ipv4.devconf_dflt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) sizeof(in_dev->cnf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) in_dev->cnf.sysctl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) in_dev->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) in_dev->arp_parms = neigh_parms_alloc(dev, &arp_tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (!in_dev->arp_parms)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) goto out_kfree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (IPV4_DEVCONF(in_dev->cnf, FORWARDING))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) dev_disable_lro(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) /* Reference in_dev->dev */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) dev_hold(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) /* Account for reference dev->ip_ptr (below) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) refcount_set(&in_dev->refcnt, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) err = devinet_sysctl_register(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) in_dev->dead = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) neigh_parms_release(&arp_tbl, in_dev->arp_parms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) in_dev_put(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) in_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) ip_mc_init_dev(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (dev->flags & IFF_UP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) ip_mc_up(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) /* we can receive as soon as ip_ptr is set -- do this last */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) rcu_assign_pointer(dev->ip_ptr, in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) return in_dev ?: ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) out_kfree:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) kfree(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) in_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) static void in_dev_rcu_put(struct rcu_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) struct in_device *idev = container_of(head, struct in_device, rcu_head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) in_dev_put(idev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static void inetdev_destroy(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) dev = in_dev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) in_dev->dead = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) ip_mc_destroy_dev(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) while ((ifa = rtnl_dereference(in_dev->ifa_list)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) inet_del_ifa(in_dev, &in_dev->ifa_list, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) inet_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) RCU_INIT_POINTER(dev->ip_ptr, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) devinet_sysctl_unregister(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) neigh_parms_release(&arp_tbl, in_dev->arp_parms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) arp_ifdown(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) call_rcu(&in_dev->rcu_head, in_dev_rcu_put);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) const struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) in_dev_for_each_ifa_rcu(ifa, in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) if (inet_ifa_match(a, ifa)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (!b || inet_ifa_match(b, ifa)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) static void __inet_del_ifa(struct in_device *in_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) struct in_ifaddr __rcu **ifap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) int destroy, struct nlmsghdr *nlh, u32 portid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) struct in_ifaddr *promote = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) struct in_ifaddr *ifa, *ifa1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) struct in_ifaddr *last_prim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) struct in_ifaddr *prev_prom = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) int do_promote = IN_DEV_PROMOTE_SECONDARIES(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) ifa1 = rtnl_dereference(*ifap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) last_prim = rtnl_dereference(in_dev->ifa_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) if (in_dev->dead)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) goto no_promotions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) /* 1. Deleting primary ifaddr forces deletion all secondaries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) * unless alias promotion is set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) struct in_ifaddr __rcu **ifap1 = &ifa1->ifa_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) while ((ifa = rtnl_dereference(*ifap1)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (!(ifa->ifa_flags & IFA_F_SECONDARY) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) ifa1->ifa_scope <= ifa->ifa_scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) last_prim = ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) if (!(ifa->ifa_flags & IFA_F_SECONDARY) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) ifa1->ifa_mask != ifa->ifa_mask ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) !inet_ifa_match(ifa1->ifa_address, ifa)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) ifap1 = &ifa->ifa_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) prev_prom = ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) if (!do_promote) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) inet_hash_remove(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) *ifap1 = ifa->ifa_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) rtmsg_ifa(RTM_DELADDR, ifa, nlh, portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) blocking_notifier_call_chain(&inetaddr_chain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) NETDEV_DOWN, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) inet_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) promote = ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) /* On promotion all secondaries from subnet are changing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) * the primary IP, we must remove all their routes silently
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) * and later to add them back with new prefsrc. Do this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) * while all addresses are on the device list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) for (ifa = promote; ifa; ifa = rtnl_dereference(ifa->ifa_next)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (ifa1->ifa_mask == ifa->ifa_mask &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) inet_ifa_match(ifa1->ifa_address, ifa))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) fib_del_ifaddr(ifa, ifa1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) no_promotions:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) /* 2. Unlink it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) *ifap = ifa1->ifa_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) inet_hash_remove(ifa1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) /* 3. Announce address deletion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) /* Send message first, then call notifier.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) At first sight, FIB update triggered by notifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) will refer to already deleted ifaddr, that could confuse
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) netlink listeners. It is not true: look, gated sees
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) that route deleted and if it still thinks that ifaddr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) is valid, it will try to restore deleted routes... Grr.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) So that, this order is correct.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) rtmsg_ifa(RTM_DELADDR, ifa1, nlh, portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) blocking_notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) if (promote) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) struct in_ifaddr *next_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) next_sec = rtnl_dereference(promote->ifa_next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) if (prev_prom) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) struct in_ifaddr *last_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) rcu_assign_pointer(prev_prom->ifa_next, next_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) last_sec = rtnl_dereference(last_prim->ifa_next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) rcu_assign_pointer(promote->ifa_next, last_sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) rcu_assign_pointer(last_prim->ifa_next, promote);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) promote->ifa_flags &= ~IFA_F_SECONDARY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) rtmsg_ifa(RTM_NEWADDR, promote, nlh, portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) blocking_notifier_call_chain(&inetaddr_chain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) NETDEV_UP, promote);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) for (ifa = next_sec; ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) ifa = rtnl_dereference(ifa->ifa_next)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) if (ifa1->ifa_mask != ifa->ifa_mask ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) !inet_ifa_match(ifa1->ifa_address, ifa))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) fib_add_ifaddr(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (destroy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) inet_free_ifa(ifa1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) static void inet_del_ifa(struct in_device *in_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) struct in_ifaddr __rcu **ifap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) int destroy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) __inet_del_ifa(in_dev, ifap, destroy, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) static void check_lifetime(struct work_struct *work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) static DECLARE_DELAYED_WORK(check_lifetime_work, check_lifetime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) u32 portid, struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) struct in_ifaddr __rcu **last_primary, **ifap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) struct in_device *in_dev = ifa->ifa_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) struct in_validator_info ivi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) struct in_ifaddr *ifa1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) if (!ifa->ifa_local) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) inet_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) ifa->ifa_flags &= ~IFA_F_SECONDARY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) last_primary = &in_dev->ifa_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) /* Don't set IPv6 only flags to IPv4 addresses */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) ifa->ifa_flags &= ~IPV6ONLY_FLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) ifap = &in_dev->ifa_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) ifa1 = rtnl_dereference(*ifap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) while (ifa1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) if (!(ifa1->ifa_flags & IFA_F_SECONDARY) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) ifa->ifa_scope <= ifa1->ifa_scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) last_primary = &ifa1->ifa_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) if (ifa1->ifa_mask == ifa->ifa_mask &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) inet_ifa_match(ifa1->ifa_address, ifa)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) if (ifa1->ifa_local == ifa->ifa_local) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) inet_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) if (ifa1->ifa_scope != ifa->ifa_scope) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) inet_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) ifa->ifa_flags |= IFA_F_SECONDARY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) ifap = &ifa1->ifa_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) ifa1 = rtnl_dereference(*ifap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) /* Allow any devices that wish to register ifaddr validtors to weigh
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) * in now, before changes are committed. The rntl lock is serializing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) * access here, so the state should not change between a validator call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) * and a final notify on commit. This isn't invoked on promotion under
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) * the assumption that validators are checking the address itself, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) * not the flags.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) ivi.ivi_addr = ifa->ifa_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) ivi.ivi_dev = ifa->ifa_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) ivi.extack = extack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) ret = blocking_notifier_call_chain(&inetaddr_validator_chain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) NETDEV_UP, &ivi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) ret = notifier_to_errno(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) inet_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) if (!(ifa->ifa_flags & IFA_F_SECONDARY)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) prandom_seed((__force u32) ifa->ifa_local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) ifap = last_primary;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) rcu_assign_pointer(ifa->ifa_next, *ifap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) rcu_assign_pointer(*ifap, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) inet_hash_insert(dev_net(in_dev->dev), ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) cancel_delayed_work(&check_lifetime_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) /* Send message first, then call notifier.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) Notifier will trigger FIB update, so that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) listeners of netlink will know about new ifaddr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) rtmsg_ifa(RTM_NEWADDR, ifa, nlh, portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) static int inet_insert_ifa(struct in_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) return __inet_insert_ifa(ifa, NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) struct in_device *in_dev = __in_dev_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) if (!in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) inet_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) return -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) ipv4_devconf_setall(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) neigh_parms_data_state_setall(in_dev->arp_parms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) if (ifa->ifa_dev != in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) WARN_ON(ifa->ifa_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) in_dev_hold(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) ifa->ifa_dev = in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) if (ipv4_is_loopback(ifa->ifa_local))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) ifa->ifa_scope = RT_SCOPE_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) return inet_insert_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) /* Caller must hold RCU or RTNL :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) * We dont take a reference on found in_device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) struct in_device *inetdev_by_index(struct net *net, int ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) struct in_device *in_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) dev = dev_get_by_index_rcu(net, ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) if (dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) in_dev = rcu_dereference_rtnl(dev->ip_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) return in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) EXPORT_SYMBOL(inetdev_by_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) /* Called only from RTNL semaphored context. No locks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) __be32 mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) in_dev_for_each_ifa_rtnl(ifa, in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) if (ifa->ifa_mask == mask && inet_ifa_match(prefix, ifa))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) return ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) static int ip_mc_autojoin_config(struct net *net, bool join,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) const struct in_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) #if defined(CONFIG_IP_MULTICAST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) struct ip_mreqn mreq = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) .imr_multiaddr.s_addr = ifa->ifa_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) .imr_ifindex = ifa->ifa_dev->dev->ifindex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) struct sock *sk = net->ipv4.mc_autojoin_sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) if (join)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) ret = ip_mc_join_group(sk, &mreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) ret = ip_mc_leave_group(sk, &mreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) struct in_ifaddr __rcu **ifap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) struct nlattr *tb[IFA_MAX+1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) struct ifaddrmsg *ifm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) int err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) ifa_ipv4_policy, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) ifm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) in_dev = inetdev_by_index(net, ifm->ifa_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) if (!in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) for (ifap = &in_dev->ifa_list; (ifa = rtnl_dereference(*ifap)) != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) ifap = &ifa->ifa_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) if (tb[IFA_LOCAL] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) ifa->ifa_local != nla_get_in_addr(tb[IFA_LOCAL]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (tb[IFA_ADDRESS] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) (ifm->ifa_prefixlen != ifa->ifa_prefixlen ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) !inet_ifa_match(nla_get_in_addr(tb[IFA_ADDRESS]), ifa)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) if (ipv4_is_multicast(ifa->ifa_address))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) ip_mc_autojoin_config(net, false, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) __inet_del_ifa(in_dev, ifap, 1, nlh, NETLINK_CB(skb).portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) err = -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) errout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) #define INFINITY_LIFE_TIME 0xFFFFFFFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) static void check_lifetime(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) unsigned long now, next, next_sec, next_sched;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) struct hlist_node *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) now = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) for (i = 0; i < IN4_ADDR_HSIZE; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) bool change_needed = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) hlist_for_each_entry_rcu(ifa, &inet_addr_lst[i], hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) unsigned long age;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) if (ifa->ifa_flags & IFA_F_PERMANENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) /* We try to batch several events at once. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) age = (now - ifa->ifa_tstamp +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) age >= ifa->ifa_valid_lft) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) change_needed = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) } else if (ifa->ifa_preferred_lft ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) INFINITY_LIFE_TIME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) } else if (age >= ifa->ifa_preferred_lft) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) if (time_before(ifa->ifa_tstamp +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) ifa->ifa_valid_lft * HZ, next))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) next = ifa->ifa_tstamp +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) ifa->ifa_valid_lft * HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) if (!(ifa->ifa_flags & IFA_F_DEPRECATED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) change_needed = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) } else if (time_before(ifa->ifa_tstamp +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) ifa->ifa_preferred_lft * HZ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) next)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) next = ifa->ifa_tstamp +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) ifa->ifa_preferred_lft * HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) if (!change_needed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) hlist_for_each_entry_safe(ifa, n, &inet_addr_lst[i], hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) unsigned long age;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) if (ifa->ifa_flags & IFA_F_PERMANENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) /* We try to batch several events at once. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) age = (now - ifa->ifa_tstamp +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) if (ifa->ifa_valid_lft != INFINITY_LIFE_TIME &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) age >= ifa->ifa_valid_lft) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) struct in_ifaddr __rcu **ifap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) struct in_ifaddr *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) ifap = &ifa->ifa_dev->ifa_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) tmp = rtnl_dereference(*ifap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) while (tmp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) if (tmp == ifa) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) inet_del_ifa(ifa->ifa_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) ifap, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) ifap = &tmp->ifa_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) tmp = rtnl_dereference(*ifap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) } else if (ifa->ifa_preferred_lft !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) INFINITY_LIFE_TIME &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) age >= ifa->ifa_preferred_lft &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) !(ifa->ifa_flags & IFA_F_DEPRECATED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) ifa->ifa_flags |= IFA_F_DEPRECATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) next_sec = round_jiffies_up(next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) next_sched = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) /* If rounded timeout is accurate enough, accept it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) next_sched = next_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) now = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) if (time_before(next_sched, now + ADDRCONF_TIMER_FUZZ_MAX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) next_sched = now + ADDRCONF_TIMER_FUZZ_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) queue_delayed_work(system_power_efficient_wq, &check_lifetime_work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) next_sched - now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) static void set_ifa_lifetime(struct in_ifaddr *ifa, __u32 valid_lft,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) __u32 prefered_lft)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) unsigned long timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) ifa->ifa_flags &= ~(IFA_F_PERMANENT | IFA_F_DEPRECATED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) timeout = addrconf_timeout_fixup(valid_lft, HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) if (addrconf_finite_timeout(timeout))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) ifa->ifa_valid_lft = timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) ifa->ifa_flags |= IFA_F_PERMANENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) timeout = addrconf_timeout_fixup(prefered_lft, HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) if (addrconf_finite_timeout(timeout)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) if (timeout == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) ifa->ifa_flags |= IFA_F_DEPRECATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) ifa->ifa_preferred_lft = timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) ifa->ifa_tstamp = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) if (!ifa->ifa_cstamp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) ifa->ifa_cstamp = ifa->ifa_tstamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) static struct in_ifaddr *rtm_to_ifaddr(struct net *net, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) __u32 *pvalid_lft, __u32 *pprefered_lft,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) struct nlattr *tb[IFA_MAX+1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) struct ifaddrmsg *ifm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) ifa_ipv4_policy, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) ifm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) if (ifm->ifa_prefixlen > 32 || !tb[IFA_LOCAL])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) dev = __dev_get_by_index(net, ifm->ifa_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) in_dev = __in_dev_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) ifa = inet_alloc_ifa();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) if (!ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) * A potential indev allocation can be left alive, it stays
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) * assigned to its device and is destroy with it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) ipv4_devconf_setall(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) neigh_parms_data_state_setall(in_dev->arp_parms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) in_dev_hold(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) if (!tb[IFA_ADDRESS])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) tb[IFA_ADDRESS] = tb[IFA_LOCAL];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) INIT_HLIST_NODE(&ifa->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) ifa->ifa_prefixlen = ifm->ifa_prefixlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) ifa->ifa_mask = inet_make_mask(ifm->ifa_prefixlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) ifm->ifa_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) ifa->ifa_scope = ifm->ifa_scope;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) ifa->ifa_dev = in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) ifa->ifa_local = nla_get_in_addr(tb[IFA_LOCAL]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) ifa->ifa_address = nla_get_in_addr(tb[IFA_ADDRESS]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) if (tb[IFA_BROADCAST])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) ifa->ifa_broadcast = nla_get_in_addr(tb[IFA_BROADCAST]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) if (tb[IFA_LABEL])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) if (tb[IFA_RT_PRIORITY])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) ifa->ifa_rt_priority = nla_get_u32(tb[IFA_RT_PRIORITY]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) if (tb[IFA_CACHEINFO]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) struct ifa_cacheinfo *ci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) ci = nla_data(tb[IFA_CACHEINFO]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) if (!ci->ifa_valid || ci->ifa_prefered > ci->ifa_valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) goto errout_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) *pvalid_lft = ci->ifa_valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) *pprefered_lft = ci->ifa_prefered;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) return ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) errout_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) inet_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) errout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) static struct in_ifaddr *find_matching_ifa(struct in_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) struct in_device *in_dev = ifa->ifa_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) struct in_ifaddr *ifa1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) if (!ifa->ifa_local)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) in_dev_for_each_ifa_rtnl(ifa1, in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) if (ifa1->ifa_mask == ifa->ifa_mask &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) inet_ifa_match(ifa1->ifa_address, ifa) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) ifa1->ifa_local == ifa->ifa_local)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) return ifa1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) struct in_ifaddr *ifa_existing;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) __u32 valid_lft = INFINITY_LIFE_TIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) __u32 prefered_lft = INFINITY_LIFE_TIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) ifa = rtm_to_ifaddr(net, nlh, &valid_lft, &prefered_lft, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) if (IS_ERR(ifa))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) return PTR_ERR(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) ifa_existing = find_matching_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) if (!ifa_existing) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) /* It would be best to check for !NLM_F_CREATE here but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) * userspace already relies on not having to provide this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) set_ifa_lifetime(ifa, valid_lft, prefered_lft);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) if (ifa->ifa_flags & IFA_F_MCAUTOJOIN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) int ret = ip_mc_autojoin_config(net, true, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) inet_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) return __inet_insert_ifa(ifa, nlh, NETLINK_CB(skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) u32 new_metric = ifa->ifa_rt_priority;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) inet_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) if (nlh->nlmsg_flags & NLM_F_EXCL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) !(nlh->nlmsg_flags & NLM_F_REPLACE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) ifa = ifa_existing;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) if (ifa->ifa_rt_priority != new_metric) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) fib_modify_prefix_metric(ifa, new_metric);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) ifa->ifa_rt_priority = new_metric;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) set_ifa_lifetime(ifa, valid_lft, prefered_lft);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) cancel_delayed_work(&check_lifetime_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) queue_delayed_work(system_power_efficient_wq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) &check_lifetime_work, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) rtmsg_ifa(RTM_NEWADDR, ifa, nlh, NETLINK_CB(skb).portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) * Determine a default network mask, based on the IP address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) static int inet_abc_len(__be32 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) int rc = -1; /* Something else, probably a multicast. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) if (ipv4_is_zeronet(addr) || ipv4_is_lbcast(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) __u32 haddr = ntohl(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) if (IN_CLASSA(haddr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) rc = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) else if (IN_CLASSB(haddr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) rc = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) else if (IN_CLASSC(haddr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) rc = 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) else if (IN_CLASSE(haddr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) rc = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) struct sockaddr_in sin_orig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) struct sockaddr_in *sin = (struct sockaddr_in *)&ifr->ifr_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) struct in_ifaddr __rcu **ifap = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) struct in_ifaddr *ifa = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) char *colon;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) int ret = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) int tryaddrmatch = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) ifr->ifr_name[IFNAMSIZ - 1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) /* save original address for comparison */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) memcpy(&sin_orig, sin, sizeof(*sin));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) colon = strchr(ifr->ifr_name, ':');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) if (colon)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) *colon = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) dev_load(net, ifr->ifr_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) case SIOCGIFADDR: /* Get interface address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) case SIOCGIFBRDADDR: /* Get the broadcast address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) case SIOCGIFDSTADDR: /* Get the destination address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) case SIOCGIFNETMASK: /* Get the netmask for the interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) /* Note that these ioctls will not sleep,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) so that we do not impose a lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) One day we will be forced to put shlock here (I mean SMP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) tryaddrmatch = (sin_orig.sin_family == AF_INET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) memset(sin, 0, sizeof(*sin));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) sin->sin_family = AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) case SIOCSIFFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) ret = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) case SIOCSIFADDR: /* Set interface address (and family) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) case SIOCSIFBRDADDR: /* Set the broadcast address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) case SIOCSIFDSTADDR: /* Set the destination address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) case SIOCSIFNETMASK: /* Set the netmask for the interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) ret = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) if (sin->sin_family != AF_INET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) dev = __dev_get_by_name(net, ifr->ifr_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) if (colon)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) *colon = ':';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) in_dev = __in_dev_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) if (in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) if (tryaddrmatch) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) /* Matthias Andree */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) /* compare label and address (4.4BSD style) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) /* note: we only do this for a limited set of ioctls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) and only if the original address family was AF_INET.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) This is checked above. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) for (ifap = &in_dev->ifa_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) (ifa = rtnl_dereference(*ifap)) != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) ifap = &ifa->ifa_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) if (!strcmp(ifr->ifr_name, ifa->ifa_label) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) sin_orig.sin_addr.s_addr ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) ifa->ifa_local) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) break; /* found */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) /* we didn't get a match, maybe the application is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) 4.3BSD-style and passed in junk so we fall back to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) comparing just the label */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) if (!ifa) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) for (ifap = &in_dev->ifa_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) (ifa = rtnl_dereference(*ifap)) != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) ifap = &ifa->ifa_next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) if (!strcmp(ifr->ifr_name, ifa->ifa_label))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) ret = -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) if (!ifa && cmd != SIOCSIFADDR && cmd != SIOCSIFFLAGS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) case SIOCGIFADDR: /* Get interface address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) sin->sin_addr.s_addr = ifa->ifa_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) case SIOCGIFBRDADDR: /* Get the broadcast address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) sin->sin_addr.s_addr = ifa->ifa_broadcast;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) case SIOCGIFDSTADDR: /* Get the destination address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) sin->sin_addr.s_addr = ifa->ifa_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) case SIOCGIFNETMASK: /* Get the netmask for the interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) sin->sin_addr.s_addr = ifa->ifa_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) case SIOCSIFFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) if (colon) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) ret = -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) if (!ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) if (!(ifr->ifr_flags & IFF_UP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) inet_del_ifa(in_dev, ifap, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) ret = dev_change_flags(dev, ifr->ifr_flags, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) case SIOCSIFADDR: /* Set interface address (and family) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) if (inet_abc_len(sin->sin_addr.s_addr) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) if (!ifa) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) ret = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) ifa = inet_alloc_ifa();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) if (!ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) INIT_HLIST_NODE(&ifa->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) if (colon)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) memcpy(ifa->ifa_label, ifr->ifr_name, IFNAMSIZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) if (ifa->ifa_local == sin->sin_addr.s_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) inet_del_ifa(in_dev, ifap, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) ifa->ifa_broadcast = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) ifa->ifa_scope = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) ifa->ifa_address = ifa->ifa_local = sin->sin_addr.s_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) if (!(dev->flags & IFF_POINTOPOINT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) ifa->ifa_prefixlen = inet_abc_len(ifa->ifa_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) ifa->ifa_mask = inet_make_mask(ifa->ifa_prefixlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) if ((dev->flags & IFF_BROADCAST) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) ifa->ifa_prefixlen < 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) ifa->ifa_broadcast = ifa->ifa_address |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) ~ifa->ifa_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) ifa->ifa_prefixlen = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) ifa->ifa_mask = inet_make_mask(32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) set_ifa_lifetime(ifa, INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) ret = inet_set_ifa(dev, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) case SIOCSIFBRDADDR: /* Set the broadcast address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) if (ifa->ifa_broadcast != sin->sin_addr.s_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) inet_del_ifa(in_dev, ifap, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) ifa->ifa_broadcast = sin->sin_addr.s_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) inet_insert_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) case SIOCSIFDSTADDR: /* Set the destination address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) if (ifa->ifa_address == sin->sin_addr.s_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) if (inet_abc_len(sin->sin_addr.s_addr) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) inet_del_ifa(in_dev, ifap, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) ifa->ifa_address = sin->sin_addr.s_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) inet_insert_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) case SIOCSIFNETMASK: /* Set the netmask for the interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) * The mask we set must be legal.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) if (bad_mask(sin->sin_addr.s_addr, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) if (ifa->ifa_mask != sin->sin_addr.s_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) __be32 old_mask = ifa->ifa_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) inet_del_ifa(in_dev, ifap, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) ifa->ifa_mask = sin->sin_addr.s_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) /* See if current broadcast address matches
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) * with current netmask, then recalculate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) * the broadcast address. Otherwise it's a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) * funny address, so don't touch it since
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) * the user seems to know what (s)he's doing...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) if ((dev->flags & IFF_BROADCAST) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) (ifa->ifa_prefixlen < 31) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) (ifa->ifa_broadcast ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) (ifa->ifa_local|~old_mask))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) ifa->ifa_broadcast = (ifa->ifa_local |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) ~sin->sin_addr.s_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) inet_insert_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) static int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) struct in_device *in_dev = __in_dev_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) const struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) struct ifreq ifr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) int done = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) if (WARN_ON(size > sizeof(struct ifreq)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) in_dev_for_each_ifa_rtnl(ifa, in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) if (!buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) done += size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) if (len < size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) memset(&ifr, 0, sizeof(struct ifreq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) strcpy(ifr.ifr_name, ifa->ifa_label);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) (*(struct sockaddr_in *)&ifr.ifr_addr).sin_family = AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) (*(struct sockaddr_in *)&ifr.ifr_addr).sin_addr.s_addr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) ifa->ifa_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) if (copy_to_user(buf + done, &ifr, size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) done = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) len -= size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) done += size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) return done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) static __be32 in_dev_select_addr(const struct in_device *in_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) int scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) const struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) in_dev_for_each_ifa_rcu(ifa, in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) if (ifa->ifa_flags & IFA_F_SECONDARY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) if (ifa->ifa_scope != RT_SCOPE_LINK &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) ifa->ifa_scope <= scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) return ifa->ifa_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) const struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) __be32 addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) unsigned char localnet_scope = RT_SCOPE_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) struct net *net = dev_net(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) int master_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) in_dev = __in_dev_get_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) goto no_in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) if (unlikely(IN_DEV_ROUTE_LOCALNET(in_dev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) localnet_scope = RT_SCOPE_LINK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) in_dev_for_each_ifa_rcu(ifa, in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) if (ifa->ifa_flags & IFA_F_SECONDARY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) if (min(ifa->ifa_scope, localnet_scope) > scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) if (!dst || inet_ifa_match(dst, ifa)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) addr = ifa->ifa_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) if (!addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) addr = ifa->ifa_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) if (addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) no_in_dev:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) master_idx = l3mdev_master_ifindex_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) /* For VRFs, the VRF device takes the place of the loopback device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) * with addresses on it being preferred. Note in such cases the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) * loopback device will be among the devices that fail the master_idx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) * equality check in the loop below.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) if (master_idx &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) (dev = dev_get_by_index_rcu(net, master_idx)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) (in_dev = __in_dev_get_rcu(dev))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) addr = in_dev_select_addr(in_dev, scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) if (addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) /* Not loopback addresses on loopback should be preferred
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) in this case. It is important that lo is the first interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) in dev_base list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) for_each_netdev_rcu(net, dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) if (l3mdev_master_ifindex_rcu(dev) != master_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) in_dev = __in_dev_get_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) addr = in_dev_select_addr(in_dev, scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) if (addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) return addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) EXPORT_SYMBOL(inet_select_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) __be32 local, int scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) unsigned char localnet_scope = RT_SCOPE_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) const struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) __be32 addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) int same = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) if (unlikely(IN_DEV_ROUTE_LOCALNET(in_dev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) localnet_scope = RT_SCOPE_LINK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) in_dev_for_each_ifa_rcu(ifa, in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) unsigned char min_scope = min(ifa->ifa_scope, localnet_scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) if (!addr &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) (local == ifa->ifa_local || !local) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) min_scope <= scope) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) addr = ifa->ifa_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) if (same)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) if (!same) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) same = (!local || inet_ifa_match(local, ifa)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) (!dst || inet_ifa_match(dst, ifa));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) if (same && addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) if (local || !dst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) /* Is the selected addr into dst subnet? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) if (inet_ifa_match(addr, ifa))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) /* No, then can we use new local src? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) if (min_scope <= scope) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) addr = ifa->ifa_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) /* search for large dst subnet for addr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) same = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) return same ? addr : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) * Confirm that local IP address exists using wildcards:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) * - net: netns to check, cannot be NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) * - in_dev: only on this interface, NULL=any interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) * - dst: only in the same subnet as dst, 0=any dst
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) * - local: address, 0=autoselect the local address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) * - scope: maximum allowed scope value for the local address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) __be32 dst, __be32 local, int scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) __be32 addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) if (in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) return confirm_addr_indev(in_dev, dst, local, scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) for_each_netdev_rcu(net, dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) in_dev = __in_dev_get_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) if (in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) addr = confirm_addr_indev(in_dev, dst, local, scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) if (addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) return addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) EXPORT_SYMBOL(inet_confirm_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) * Device notifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) int register_inetaddr_notifier(struct notifier_block *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) return blocking_notifier_chain_register(&inetaddr_chain, nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) EXPORT_SYMBOL(register_inetaddr_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) int unregister_inetaddr_notifier(struct notifier_block *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) return blocking_notifier_chain_unregister(&inetaddr_chain, nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) EXPORT_SYMBOL(unregister_inetaddr_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) int register_inetaddr_validator_notifier(struct notifier_block *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) return blocking_notifier_chain_register(&inetaddr_validator_chain, nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) EXPORT_SYMBOL(register_inetaddr_validator_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) int unregister_inetaddr_validator_notifier(struct notifier_block *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) return blocking_notifier_chain_unregister(&inetaddr_validator_chain,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) EXPORT_SYMBOL(unregister_inetaddr_validator_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) /* Rename ifa_labels for a device name change. Make some effort to preserve
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) * existing alias numbering and to create unique labels if possible.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) static void inetdev_changename(struct net_device *dev, struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) int named = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) in_dev_for_each_ifa_rtnl(ifa, in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) char old[IFNAMSIZ], *dot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) memcpy(old, ifa->ifa_label, IFNAMSIZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) if (named++ == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) goto skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) dot = strchr(old, ':');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) if (!dot) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) sprintf(old, ":%d", named);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) dot = old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) if (strlen(dot) + strlen(dev->name) < IFNAMSIZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) strcat(ifa->ifa_label, dot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) strcpy(ifa->ifa_label + (IFNAMSIZ - strlen(dot) - 1), dot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) skip:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) rtmsg_ifa(RTM_NEWADDR, ifa, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) static void inetdev_send_gratuitous_arp(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) const struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) in_dev_for_each_ifa_rtnl(ifa, in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) arp_send(ARPOP_REQUEST, ETH_P_ARP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) ifa->ifa_local, dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) ifa->ifa_local, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) dev->dev_addr, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) /* Called only under RTNL semaphore */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) static int inetdev_event(struct notifier_block *this, unsigned long event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) struct net_device *dev = netdev_notifier_info_to_dev(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) struct in_device *in_dev = __in_dev_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) if (!in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) if (event == NETDEV_REGISTER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) in_dev = inetdev_init(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) if (IS_ERR(in_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) return notifier_from_errno(PTR_ERR(in_dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) if (dev->flags & IFF_LOOPBACK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) IN_DEV_CONF_SET(in_dev, NOXFRM, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) IN_DEV_CONF_SET(in_dev, NOPOLICY, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) } else if (event == NETDEV_CHANGEMTU) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) /* Re-enabling IP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) if (inetdev_valid_mtu(dev->mtu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) in_dev = inetdev_init(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) case NETDEV_REGISTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) pr_debug("%s: bug\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) RCU_INIT_POINTER(dev->ip_ptr, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) case NETDEV_UP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) if (!inetdev_valid_mtu(dev->mtu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) if (dev->flags & IFF_LOOPBACK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) struct in_ifaddr *ifa = inet_alloc_ifa();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) if (ifa) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) INIT_HLIST_NODE(&ifa->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) ifa->ifa_local =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) ifa->ifa_address = htonl(INADDR_LOOPBACK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) ifa->ifa_prefixlen = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) ifa->ifa_mask = inet_make_mask(8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) in_dev_hold(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) ifa->ifa_dev = in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) ifa->ifa_scope = RT_SCOPE_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) set_ifa_lifetime(ifa, INFINITY_LIFE_TIME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) INFINITY_LIFE_TIME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) ipv4_devconf_setall(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) neigh_parms_data_state_setall(in_dev->arp_parms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) inet_insert_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) ip_mc_up(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) case NETDEV_CHANGEADDR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) if (!IN_DEV_ARP_NOTIFY(in_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) case NETDEV_NOTIFY_PEERS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) /* Send gratuitous ARP to notify of link change */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) inetdev_send_gratuitous_arp(dev, in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) case NETDEV_DOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) ip_mc_down(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) case NETDEV_PRE_TYPE_CHANGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) ip_mc_unmap(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) case NETDEV_POST_TYPE_CHANGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) ip_mc_remap(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) case NETDEV_CHANGEMTU:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) if (inetdev_valid_mtu(dev->mtu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) /* disable IP when MTU is not enough */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) case NETDEV_UNREGISTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) inetdev_destroy(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) case NETDEV_CHANGENAME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) /* Do not notify about label change, this event is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) * not interesting to applications using netlink.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) inetdev_changename(dev, in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) devinet_sysctl_unregister(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) devinet_sysctl_register(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) static struct notifier_block ip_netdev_notifier = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) .notifier_call = inetdev_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) static size_t inet_nlmsg_size(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) + nla_total_size(4) /* IFA_ADDRESS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) + nla_total_size(4) /* IFA_LOCAL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) + nla_total_size(4) /* IFA_BROADCAST */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) + nla_total_size(4) /* IFA_FLAGS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) + nla_total_size(4) /* IFA_RT_PRIORITY */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) + nla_total_size(sizeof(struct ifa_cacheinfo)); /* IFA_CACHEINFO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) static inline u32 cstamp_delta(unsigned long cstamp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) return (cstamp - INITIAL_JIFFIES) * 100UL / HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) unsigned long tstamp, u32 preferred, u32 valid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) struct ifa_cacheinfo ci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) ci.cstamp = cstamp_delta(cstamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) ci.tstamp = cstamp_delta(tstamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) ci.ifa_prefered = preferred;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) ci.ifa_valid = valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) struct inet_fill_args *args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) struct ifaddrmsg *ifm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) struct nlmsghdr *nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) u32 preferred, valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) nlh = nlmsg_put(skb, args->portid, args->seq, args->event, sizeof(*ifm),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) args->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) if (!nlh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) ifm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) ifm->ifa_family = AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) ifm->ifa_prefixlen = ifa->ifa_prefixlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) ifm->ifa_flags = ifa->ifa_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) ifm->ifa_scope = ifa->ifa_scope;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) if (args->netnsid >= 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) nla_put_s32(skb, IFA_TARGET_NETNSID, args->netnsid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) if (!(ifm->ifa_flags & IFA_F_PERMANENT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) preferred = ifa->ifa_preferred_lft;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) valid = ifa->ifa_valid_lft;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) if (preferred != INFINITY_LIFE_TIME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) long tval = (jiffies - ifa->ifa_tstamp) / HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) if (preferred > tval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) preferred -= tval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) preferred = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) if (valid != INFINITY_LIFE_TIME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) if (valid > tval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) valid -= tval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) valid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) preferred = INFINITY_LIFE_TIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) valid = INFINITY_LIFE_TIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) if ((ifa->ifa_address &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) nla_put_in_addr(skb, IFA_ADDRESS, ifa->ifa_address)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) (ifa->ifa_local &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) nla_put_in_addr(skb, IFA_LOCAL, ifa->ifa_local)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) (ifa->ifa_broadcast &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) nla_put_in_addr(skb, IFA_BROADCAST, ifa->ifa_broadcast)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) (ifa->ifa_label[0] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) nla_put_u32(skb, IFA_FLAGS, ifa->ifa_flags) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) (ifa->ifa_rt_priority &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) nla_put_u32(skb, IFA_RT_PRIORITY, ifa->ifa_rt_priority)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) put_cacheinfo(skb, ifa->ifa_cstamp, ifa->ifa_tstamp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) preferred, valid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) nlmsg_end(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) nlmsg_cancel(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) static int inet_valid_dump_ifaddr_req(const struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) struct inet_fill_args *fillargs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) struct net **tgt_net, struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) struct netlink_ext_ack *extack = cb->extack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) struct nlattr *tb[IFA_MAX+1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) struct ifaddrmsg *ifm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) int err, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) NL_SET_ERR_MSG(extack, "ipv4: Invalid header for address dump request");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) ifm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) if (ifm->ifa_prefixlen || ifm->ifa_flags || ifm->ifa_scope) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) NL_SET_ERR_MSG(extack, "ipv4: Invalid values in header for address dump request");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) fillargs->ifindex = ifm->ifa_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) if (fillargs->ifindex) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) cb->answer_flags |= NLM_F_DUMP_FILTERED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) fillargs->flags |= NLM_F_DUMP_FILTERED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFA_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) ifa_ipv4_policy, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) for (i = 0; i <= IFA_MAX; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) if (!tb[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) if (i == IFA_TARGET_NETNSID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) struct net *net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) fillargs->netnsid = nla_get_s32(tb[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) net = rtnl_get_net_ns_capable(sk, fillargs->netnsid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) if (IS_ERR(net)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) fillargs->netnsid = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) NL_SET_ERR_MSG(extack, "ipv4: Invalid target network namespace id");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) return PTR_ERR(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) *tgt_net = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) NL_SET_ERR_MSG(extack, "ipv4: Unsupported attribute in dump request");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) static int in_dev_dump_addr(struct in_device *in_dev, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) struct netlink_callback *cb, int s_ip_idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) struct inet_fill_args *fillargs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) int ip_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) in_dev_for_each_ifa_rtnl(ifa, in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) if (ip_idx < s_ip_idx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) ip_idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) err = inet_fill_ifaddr(skb, ifa, fillargs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) nl_dump_check_consistent(cb, nlmsg_hdr(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) ip_idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) cb->args[2] = ip_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) const struct nlmsghdr *nlh = cb->nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) struct inet_fill_args fillargs = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) .portid = NETLINK_CB(cb->skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) .seq = nlh->nlmsg_seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) .event = RTM_NEWADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) .flags = NLM_F_MULTI,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) .netnsid = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) struct net *tgt_net = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) int h, s_h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) int idx, s_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) int s_ip_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) struct hlist_head *head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) s_h = cb->args[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) s_idx = idx = cb->args[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) s_ip_idx = cb->args[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) if (cb->strict_check) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) err = inet_valid_dump_ifaddr_req(nlh, &fillargs, &tgt_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) skb->sk, cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) goto put_tgt_net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) if (fillargs.ifindex) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) dev = __dev_get_by_index(tgt_net, fillargs.ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) if (!dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) goto put_tgt_net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) in_dev = __in_dev_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) if (in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) err = in_dev_dump_addr(in_dev, skb, cb, s_ip_idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) &fillargs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) goto put_tgt_net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) head = &tgt_net->dev_index_head[h];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) cb->seq = atomic_read(&tgt_net->ipv4.dev_addr_genid) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) tgt_net->dev_base_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) hlist_for_each_entry_rcu(dev, head, index_hlist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) if (idx < s_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) goto cont;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) if (h > s_h || idx > s_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) s_ip_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) in_dev = __in_dev_get_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) goto cont;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) err = in_dev_dump_addr(in_dev, skb, cb, s_ip_idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) &fillargs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) cont:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) cb->args[0] = h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) cb->args[1] = idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) put_tgt_net:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) if (fillargs.netnsid >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) put_net(tgt_net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) return skb->len ? : err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) static void rtmsg_ifa(int event, struct in_ifaddr *ifa, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) u32 portid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) struct inet_fill_args fillargs = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) .portid = portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) .seq = nlh ? nlh->nlmsg_seq : 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) .event = event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) .flags = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) .netnsid = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) int err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) struct net *net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) net = dev_net(ifa->ifa_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) skb = nlmsg_new(inet_nlmsg_size(), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) err = inet_fill_ifaddr(skb, ifa, &fillargs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) /* -EMSGSIZE implies BUG in inet_nlmsg_size() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) WARN_ON(err == -EMSGSIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) rtnl_notify(skb, net, portid, RTNLGRP_IPV4_IFADDR, nlh, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) errout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) rtnl_set_sk_err(net, RTNLGRP_IPV4_IFADDR, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) static size_t inet_get_link_af_size(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) u32 ext_filter_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) return nla_total_size(IPV4_DEVCONF_MAX * 4); /* IFLA_INET_CONF */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) static int inet_fill_link_af(struct sk_buff *skb, const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) u32 ext_filter_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) struct in_device *in_dev = rcu_dereference_rtnl(dev->ip_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) struct nlattr *nla;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) return -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) nla = nla_reserve(skb, IFLA_INET_CONF, IPV4_DEVCONF_MAX * 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) if (!nla)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) for (i = 0; i < IPV4_DEVCONF_MAX; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) ((u32 *) nla_data(nla))[i] = in_dev->cnf.data[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) static const struct nla_policy inet_af_policy[IFLA_INET_MAX+1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) [IFLA_INET_CONF] = { .type = NLA_NESTED },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) static int inet_validate_link_af(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) const struct nlattr *nla)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) struct nlattr *a, *tb[IFLA_INET_MAX+1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) int err, rem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) if (dev && !__in_dev_get_rcu(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) return -EAFNOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) err = nla_parse_nested_deprecated(tb, IFLA_INET_MAX, nla,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) inet_af_policy, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) if (tb[IFLA_INET_CONF]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) nla_for_each_nested(a, tb[IFLA_INET_CONF], rem) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) int cfgid = nla_type(a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) if (nla_len(a) < 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) if (cfgid <= 0 || cfgid > IPV4_DEVCONF_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) static int inet_set_link_af(struct net_device *dev, const struct nlattr *nla)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) struct in_device *in_dev = __in_dev_get_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) struct nlattr *a, *tb[IFLA_INET_MAX+1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) int rem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) return -EAFNOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) if (nla_parse_nested_deprecated(tb, IFLA_INET_MAX, nla, NULL, NULL) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) if (tb[IFLA_INET_CONF]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) nla_for_each_nested(a, tb[IFLA_INET_CONF], rem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) ipv4_devconf_set(in_dev, nla_type(a), nla_get_u32(a));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) static int inet_netconf_msgsize_devconf(int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) int size = NLMSG_ALIGN(sizeof(struct netconfmsg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) + nla_total_size(4); /* NETCONFA_IFINDEX */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) bool all = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) if (type == NETCONFA_ALL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) all = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) if (all || type == NETCONFA_FORWARDING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) size += nla_total_size(4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) if (all || type == NETCONFA_RP_FILTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) size += nla_total_size(4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015) if (all || type == NETCONFA_MC_FORWARDING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) size += nla_total_size(4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) if (all || type == NETCONFA_BC_FORWARDING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) size += nla_total_size(4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) if (all || type == NETCONFA_PROXY_NEIGH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) size += nla_total_size(4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) if (all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) size += nla_total_size(4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) static int inet_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028) struct ipv4_devconf *devconf, u32 portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) u32 seq, int event, unsigned int flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) struct nlmsghdr *nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) struct netconfmsg *ncm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) bool all = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) if (!nlh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041) if (type == NETCONFA_ALL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) all = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) ncm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) ncm->ncm_family = AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050) if (!devconf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) if ((all || type == NETCONFA_FORWARDING) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054) nla_put_s32(skb, NETCONFA_FORWARDING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) IPV4_DEVCONF(*devconf, FORWARDING)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) if ((all || type == NETCONFA_RP_FILTER) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) nla_put_s32(skb, NETCONFA_RP_FILTER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059) IPV4_DEVCONF(*devconf, RP_FILTER)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) if ((all || type == NETCONFA_MC_FORWARDING) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062) nla_put_s32(skb, NETCONFA_MC_FORWARDING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) IPV4_DEVCONF(*devconf, MC_FORWARDING)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) if ((all || type == NETCONFA_BC_FORWARDING) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) nla_put_s32(skb, NETCONFA_BC_FORWARDING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) IPV4_DEVCONF(*devconf, BC_FORWARDING)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) if ((all || type == NETCONFA_PROXY_NEIGH) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) nla_put_s32(skb, NETCONFA_PROXY_NEIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) IPV4_DEVCONF(*devconf, PROXY_ARP)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) if ((all || type == NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) nla_put_s32(skb, NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) IPV4_DEVCONF(*devconf, IGNORE_ROUTES_WITH_LINKDOWN)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) nlmsg_end(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) nlmsg_cancel(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087) void inet_netconf_notify_devconf(struct net *net, int event, int type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) int ifindex, struct ipv4_devconf *devconf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) int err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093) skb = nlmsg_new(inet_netconf_msgsize_devconf(type), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097) err = inet_netconf_fill_devconf(skb, ifindex, devconf, 0, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098) event, 0, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100) /* -EMSGSIZE implies BUG in inet_netconf_msgsize_devconf() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) WARN_ON(err == -EMSGSIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) rtnl_notify(skb, net, 0, RTNLGRP_IPV4_NETCONF, NULL, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) errout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) rtnl_set_sk_err(net, RTNLGRP_IPV4_NETCONF, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) static const struct nla_policy devconf_ipv4_policy[NETCONFA_MAX+1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113) [NETCONFA_IFINDEX] = { .len = sizeof(int) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) [NETCONFA_FORWARDING] = { .len = sizeof(int) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) [NETCONFA_RP_FILTER] = { .len = sizeof(int) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) [NETCONFA_PROXY_NEIGH] = { .len = sizeof(int) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) [NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN] = { .len = sizeof(int) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) static int inet_netconf_valid_get_req(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121) const struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) struct nlattr **tb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) int i, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(struct netconfmsg))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) NL_SET_ERR_MSG(extack, "ipv4: Invalid header for netconf get request");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) if (!netlink_strict_get_check(skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) return nlmsg_parse_deprecated(nlh, sizeof(struct netconfmsg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134) tb, NETCONFA_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135) devconf_ipv4_policy, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137) err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct netconfmsg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138) tb, NETCONFA_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) devconf_ipv4_policy, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) for (i = 0; i <= NETCONFA_MAX; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) if (!tb[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) switch (i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148) case NETCONFA_IFINDEX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) NL_SET_ERR_MSG(extack, "ipv4: Unsupported attribute in netconf get request");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) static int inet_netconf_get_devconf(struct sk_buff *in_skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) struct net *net = sock_net(in_skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164) struct nlattr *tb[NETCONFA_MAX+1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166) struct ipv4_devconf *devconf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169) int ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172) err = inet_netconf_valid_get_req(in_skb, nlh, tb, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177) if (!tb[NETCONFA_IFINDEX])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180) ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181) switch (ifindex) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2182) case NETCONFA_IFINDEX_ALL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2183) devconf = net->ipv4.devconf_all;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2184) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2185) case NETCONFA_IFINDEX_DEFAULT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2186) devconf = net->ipv4.devconf_dflt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2187) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2188) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2189) dev = __dev_get_by_index(net, ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2190) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2191) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2192) in_dev = __in_dev_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2193) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2194) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2195) devconf = &in_dev->cnf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2196) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2199) err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2200) skb = nlmsg_new(inet_netconf_msgsize_devconf(NETCONFA_ALL), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2201) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2202) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2204) err = inet_netconf_fill_devconf(skb, ifindex, devconf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2205) NETLINK_CB(in_skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2206) nlh->nlmsg_seq, RTM_NEWNETCONF, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2207) NETCONFA_ALL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2208) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2209) /* -EMSGSIZE implies BUG in inet_netconf_msgsize_devconf() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2210) WARN_ON(err == -EMSGSIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2211) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2212) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2214) err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2215) errout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2216) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2219) static int inet_netconf_dump_devconf(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2220) struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2222) const struct nlmsghdr *nlh = cb->nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2223) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2224) int h, s_h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2225) int idx, s_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2226) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2227) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2228) struct hlist_head *head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2230) if (cb->strict_check) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2231) struct netlink_ext_ack *extack = cb->extack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2232) struct netconfmsg *ncm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2234) if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ncm))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2235) NL_SET_ERR_MSG(extack, "ipv4: Invalid header for netconf dump request");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2236) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2239) if (nlmsg_attrlen(nlh, sizeof(*ncm))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2240) NL_SET_ERR_MSG(extack, "ipv4: Invalid data after header in netconf dump request");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2241) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2245) s_h = cb->args[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2246) s_idx = idx = cb->args[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2248) for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2249) idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2250) head = &net->dev_index_head[h];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2251) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2252) cb->seq = atomic_read(&net->ipv4.dev_addr_genid) ^
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2253) net->dev_base_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2254) hlist_for_each_entry_rcu(dev, head, index_hlist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2255) if (idx < s_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2256) goto cont;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2257) in_dev = __in_dev_get_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2258) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2259) goto cont;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2261) if (inet_netconf_fill_devconf(skb, dev->ifindex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2262) &in_dev->cnf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2263) NETLINK_CB(cb->skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2264) nlh->nlmsg_seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2265) RTM_NEWNETCONF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2266) NLM_F_MULTI,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2267) NETCONFA_ALL) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2268) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2269) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2271) nl_dump_check_consistent(cb, nlmsg_hdr(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2272) cont:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2273) idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2275) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2277) if (h == NETDEV_HASHENTRIES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2278) if (inet_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2279) net->ipv4.devconf_all,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2280) NETLINK_CB(cb->skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2281) nlh->nlmsg_seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2282) RTM_NEWNETCONF, NLM_F_MULTI,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2283) NETCONFA_ALL) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2284) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2285) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2286) h++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2288) if (h == NETDEV_HASHENTRIES + 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2289) if (inet_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2290) net->ipv4.devconf_dflt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2291) NETLINK_CB(cb->skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2292) nlh->nlmsg_seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2293) RTM_NEWNETCONF, NLM_F_MULTI,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2294) NETCONFA_ALL) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2295) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2296) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2297) h++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2299) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2300) cb->args[0] = h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2301) cb->args[1] = idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2303) return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2306) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2308) static void devinet_copy_dflt_conf(struct net *net, int i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2310) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2312) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2313) for_each_netdev_rcu(net, dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2314) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2316) in_dev = __in_dev_get_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2317) if (in_dev && !test_bit(i, in_dev->cnf.state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2318) in_dev->cnf.data[i] = net->ipv4.devconf_dflt->data[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2320) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2321) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2323) /* called with RTNL locked */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2324) static void inet_forward_change(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2325) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2326) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2327) int on = IPV4_DEVCONF_ALL(net, FORWARDING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2329) IPV4_DEVCONF_ALL(net, ACCEPT_REDIRECTS) = !on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2330) IPV4_DEVCONF_DFLT(net, FORWARDING) = on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2331) inet_netconf_notify_devconf(net, RTM_NEWNETCONF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2332) NETCONFA_FORWARDING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2333) NETCONFA_IFINDEX_ALL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2334) net->ipv4.devconf_all);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2335) inet_netconf_notify_devconf(net, RTM_NEWNETCONF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2336) NETCONFA_FORWARDING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2337) NETCONFA_IFINDEX_DEFAULT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2338) net->ipv4.devconf_dflt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2340) for_each_netdev(net, dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2341) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2343) if (on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2344) dev_disable_lro(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2346) in_dev = __in_dev_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2347) if (in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2348) IN_DEV_CONF_SET(in_dev, FORWARDING, on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2349) inet_netconf_notify_devconf(net, RTM_NEWNETCONF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2350) NETCONFA_FORWARDING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2351) dev->ifindex, &in_dev->cnf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2356) static int devinet_conf_ifindex(struct net *net, struct ipv4_devconf *cnf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2357) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2358) if (cnf == net->ipv4.devconf_dflt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2359) return NETCONFA_IFINDEX_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2360) else if (cnf == net->ipv4.devconf_all)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2361) return NETCONFA_IFINDEX_ALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2362) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2363) struct in_device *idev
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2364) = container_of(cnf, struct in_device, cnf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2365) return idev->dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2367) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2369) static int devinet_conf_proc(struct ctl_table *ctl, int write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2370) void *buffer, size_t *lenp, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2371) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2372) int old_value = *(int *)ctl->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2373) int ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2374) int new_value = *(int *)ctl->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2376) if (write) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2377) struct ipv4_devconf *cnf = ctl->extra1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2378) struct net *net = ctl->extra2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2379) int i = (int *)ctl->data - cnf->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2380) int ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2382) set_bit(i, cnf->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2384) if (cnf == net->ipv4.devconf_dflt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2385) devinet_copy_dflt_conf(net, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2386) if (i == IPV4_DEVCONF_ACCEPT_LOCAL - 1 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2387) i == IPV4_DEVCONF_ROUTE_LOCALNET - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2388) if ((new_value == 0) && (old_value != 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2389) rt_cache_flush(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2391) if (i == IPV4_DEVCONF_BC_FORWARDING - 1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2392) new_value != old_value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2393) rt_cache_flush(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2395) if (i == IPV4_DEVCONF_RP_FILTER - 1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2396) new_value != old_value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2397) ifindex = devinet_conf_ifindex(net, cnf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2398) inet_netconf_notify_devconf(net, RTM_NEWNETCONF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2399) NETCONFA_RP_FILTER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2400) ifindex, cnf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2402) if (i == IPV4_DEVCONF_PROXY_ARP - 1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2403) new_value != old_value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2404) ifindex = devinet_conf_ifindex(net, cnf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2405) inet_netconf_notify_devconf(net, RTM_NEWNETCONF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2406) NETCONFA_PROXY_NEIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2407) ifindex, cnf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2409) if (i == IPV4_DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN - 1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2410) new_value != old_value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2411) ifindex = devinet_conf_ifindex(net, cnf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2412) inet_netconf_notify_devconf(net, RTM_NEWNETCONF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2413) NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2414) ifindex, cnf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2416) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2418) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2421) static int devinet_sysctl_forward(struct ctl_table *ctl, int write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2422) void *buffer, size_t *lenp, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2423) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2424) int *valp = ctl->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2425) int val = *valp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2426) loff_t pos = *ppos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2427) int ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2429) if (write && *valp != val) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2430) struct net *net = ctl->extra2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2432) if (valp != &IPV4_DEVCONF_DFLT(net, FORWARDING)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2433) if (!rtnl_trylock()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2434) /* Restore the original values before restarting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2435) *valp = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2436) *ppos = pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2437) return restart_syscall();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2439) if (valp == &IPV4_DEVCONF_ALL(net, FORWARDING)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2440) inet_forward_change(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2441) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2442) struct ipv4_devconf *cnf = ctl->extra1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2443) struct in_device *idev =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2444) container_of(cnf, struct in_device, cnf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2445) if (*valp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2446) dev_disable_lro(idev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2447) inet_netconf_notify_devconf(net, RTM_NEWNETCONF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2448) NETCONFA_FORWARDING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2449) idev->dev->ifindex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2450) cnf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2452) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2453) rt_cache_flush(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2454) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2455) inet_netconf_notify_devconf(net, RTM_NEWNETCONF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2456) NETCONFA_FORWARDING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2457) NETCONFA_IFINDEX_DEFAULT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2458) net->ipv4.devconf_dflt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2461) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2462) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2464) static int ipv4_doint_and_flush(struct ctl_table *ctl, int write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2465) void *buffer, size_t *lenp, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2466) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2467) int *valp = ctl->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2468) int val = *valp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2469) int ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2470) struct net *net = ctl->extra2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2472) if (write && *valp != val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2473) rt_cache_flush(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2475) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2478) #define DEVINET_SYSCTL_ENTRY(attr, name, mval, proc) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2479) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2480) .procname = name, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2481) .data = ipv4_devconf.data + \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2482) IPV4_DEVCONF_ ## attr - 1, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2483) .maxlen = sizeof(int), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2484) .mode = mval, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2485) .proc_handler = proc, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2486) .extra1 = &ipv4_devconf, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2489) #define DEVINET_SYSCTL_RW_ENTRY(attr, name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2490) DEVINET_SYSCTL_ENTRY(attr, name, 0644, devinet_conf_proc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2492) #define DEVINET_SYSCTL_RO_ENTRY(attr, name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2493) DEVINET_SYSCTL_ENTRY(attr, name, 0444, devinet_conf_proc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2495) #define DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, proc) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2496) DEVINET_SYSCTL_ENTRY(attr, name, 0644, proc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2498) #define DEVINET_SYSCTL_FLUSHING_ENTRY(attr, name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2499) DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, ipv4_doint_and_flush)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2501) static struct devinet_sysctl_table {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2502) struct ctl_table_header *sysctl_header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2503) struct ctl_table devinet_vars[__IPV4_DEVCONF_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2504) } devinet_sysctl = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2505) .devinet_vars = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2506) DEVINET_SYSCTL_COMPLEX_ENTRY(FORWARDING, "forwarding",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2507) devinet_sysctl_forward),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2508) DEVINET_SYSCTL_RO_ENTRY(MC_FORWARDING, "mc_forwarding"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2509) DEVINET_SYSCTL_RW_ENTRY(BC_FORWARDING, "bc_forwarding"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2511) DEVINET_SYSCTL_RW_ENTRY(ACCEPT_REDIRECTS, "accept_redirects"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2512) DEVINET_SYSCTL_RW_ENTRY(SECURE_REDIRECTS, "secure_redirects"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2513) DEVINET_SYSCTL_RW_ENTRY(SHARED_MEDIA, "shared_media"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2514) DEVINET_SYSCTL_RW_ENTRY(RP_FILTER, "rp_filter"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2515) DEVINET_SYSCTL_RW_ENTRY(SEND_REDIRECTS, "send_redirects"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2516) DEVINET_SYSCTL_RW_ENTRY(ACCEPT_SOURCE_ROUTE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2517) "accept_source_route"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2518) DEVINET_SYSCTL_RW_ENTRY(ACCEPT_LOCAL, "accept_local"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2519) DEVINET_SYSCTL_RW_ENTRY(SRC_VMARK, "src_valid_mark"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2520) DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP, "proxy_arp"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2521) DEVINET_SYSCTL_RW_ENTRY(MEDIUM_ID, "medium_id"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2522) DEVINET_SYSCTL_RW_ENTRY(BOOTP_RELAY, "bootp_relay"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2523) DEVINET_SYSCTL_RW_ENTRY(LOG_MARTIANS, "log_martians"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2524) DEVINET_SYSCTL_RW_ENTRY(TAG, "tag"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2525) DEVINET_SYSCTL_RW_ENTRY(ARPFILTER, "arp_filter"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2526) DEVINET_SYSCTL_RW_ENTRY(ARP_ANNOUNCE, "arp_announce"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2527) DEVINET_SYSCTL_RW_ENTRY(ARP_IGNORE, "arp_ignore"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2528) DEVINET_SYSCTL_RW_ENTRY(ARP_ACCEPT, "arp_accept"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2529) DEVINET_SYSCTL_RW_ENTRY(ARP_NOTIFY, "arp_notify"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2530) DEVINET_SYSCTL_RW_ENTRY(PROXY_ARP_PVLAN, "proxy_arp_pvlan"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2531) DEVINET_SYSCTL_RW_ENTRY(FORCE_IGMP_VERSION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2532) "force_igmp_version"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2533) DEVINET_SYSCTL_RW_ENTRY(IGMPV2_UNSOLICITED_REPORT_INTERVAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2534) "igmpv2_unsolicited_report_interval"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2535) DEVINET_SYSCTL_RW_ENTRY(IGMPV3_UNSOLICITED_REPORT_INTERVAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2536) "igmpv3_unsolicited_report_interval"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2537) DEVINET_SYSCTL_RW_ENTRY(IGNORE_ROUTES_WITH_LINKDOWN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2538) "ignore_routes_with_linkdown"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2539) DEVINET_SYSCTL_RW_ENTRY(DROP_GRATUITOUS_ARP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2540) "drop_gratuitous_arp"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2542) DEVINET_SYSCTL_FLUSHING_ENTRY(NOXFRM, "disable_xfrm"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2543) DEVINET_SYSCTL_FLUSHING_ENTRY(NOPOLICY, "disable_policy"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2544) DEVINET_SYSCTL_FLUSHING_ENTRY(PROMOTE_SECONDARIES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2545) "promote_secondaries"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2546) DEVINET_SYSCTL_FLUSHING_ENTRY(ROUTE_LOCALNET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2547) "route_localnet"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2548) DEVINET_SYSCTL_FLUSHING_ENTRY(DROP_UNICAST_IN_L2_MULTICAST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2549) "drop_unicast_in_l2_multicast"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2550) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2551) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2553) static int __devinet_sysctl_register(struct net *net, char *dev_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2554) int ifindex, struct ipv4_devconf *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2555) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2556) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2557) struct devinet_sysctl_table *t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2558) char path[sizeof("net/ipv4/conf/") + IFNAMSIZ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2560) t = kmemdup(&devinet_sysctl, sizeof(*t), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2561) if (!t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2562) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2564) for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2565) t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2566) t->devinet_vars[i].extra1 = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2567) t->devinet_vars[i].extra2 = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2568) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2570) snprintf(path, sizeof(path), "net/ipv4/conf/%s", dev_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2572) t->sysctl_header = register_net_sysctl(net, path, t->devinet_vars);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2573) if (!t->sysctl_header)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2574) goto free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2576) p->sysctl = t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2578) inet_netconf_notify_devconf(net, RTM_NEWNETCONF, NETCONFA_ALL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2579) ifindex, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2580) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2582) free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2583) kfree(t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2584) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2585) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2586) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2588) static void __devinet_sysctl_unregister(struct net *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2589) struct ipv4_devconf *cnf, int ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2590) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2591) struct devinet_sysctl_table *t = cnf->sysctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2593) if (t) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2594) cnf->sysctl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2595) unregister_net_sysctl_table(t->sysctl_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2596) kfree(t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2597) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2599) inet_netconf_notify_devconf(net, RTM_DELNETCONF, 0, ifindex, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2600) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2602) static int devinet_sysctl_register(struct in_device *idev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2603) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2604) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2606) if (!sysctl_dev_name_is_allowed(idev->dev->name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2607) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2609) err = neigh_sysctl_register(idev->dev, idev->arp_parms, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2610) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2611) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2612) err = __devinet_sysctl_register(dev_net(idev->dev), idev->dev->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2613) idev->dev->ifindex, &idev->cnf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2614) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2615) neigh_sysctl_unregister(idev->arp_parms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2616) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2617) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2619) static void devinet_sysctl_unregister(struct in_device *idev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2620) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2621) struct net *net = dev_net(idev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2623) __devinet_sysctl_unregister(net, &idev->cnf, idev->dev->ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2624) neigh_sysctl_unregister(idev->arp_parms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2625) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2627) static struct ctl_table ctl_forward_entry[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2628) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2629) .procname = "ip_forward",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2630) .data = &ipv4_devconf.data[
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2631) IPV4_DEVCONF_FORWARDING - 1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2632) .maxlen = sizeof(int),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2633) .mode = 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2634) .proc_handler = devinet_sysctl_forward,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2635) .extra1 = &ipv4_devconf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2636) .extra2 = &init_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2637) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2638) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2639) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2640) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2642) static __net_init int devinet_init_net(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2643) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2644) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2645) struct ipv4_devconf *all, *dflt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2646) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2647) struct ctl_table *tbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2648) struct ctl_table_header *forw_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2649) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2651) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2652) all = kmemdup(&ipv4_devconf, sizeof(ipv4_devconf), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2653) if (!all)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2654) goto err_alloc_all;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2655)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2656) dflt = kmemdup(&ipv4_devconf_dflt, sizeof(ipv4_devconf_dflt), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2657) if (!dflt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2658) goto err_alloc_dflt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2660) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2661) tbl = kmemdup(ctl_forward_entry, sizeof(ctl_forward_entry), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2662) if (!tbl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2663) goto err_alloc_ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2665) tbl[0].data = &all->data[IPV4_DEVCONF_FORWARDING - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2666) tbl[0].extra1 = all;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2667) tbl[0].extra2 = net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2668) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2670) if (!net_eq(net, &init_net)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2671) if (IS_ENABLED(CONFIG_SYSCTL) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2672) sysctl_devconf_inherit_init_net == 3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2673) /* copy from the current netns */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2674) memcpy(all, current->nsproxy->net_ns->ipv4.devconf_all,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2675) sizeof(ipv4_devconf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2676) memcpy(dflt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2677) current->nsproxy->net_ns->ipv4.devconf_dflt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2678) sizeof(ipv4_devconf_dflt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2679) } else if (!IS_ENABLED(CONFIG_SYSCTL) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2680) sysctl_devconf_inherit_init_net != 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2681) /* inherit == 0 or 1: copy from init_net */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2682) memcpy(all, init_net.ipv4.devconf_all,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2683) sizeof(ipv4_devconf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2684) memcpy(dflt, init_net.ipv4.devconf_dflt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2685) sizeof(ipv4_devconf_dflt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2686) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2687) /* else inherit == 2: use compiled values */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2690) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2691) err = __devinet_sysctl_register(net, "all", NETCONFA_IFINDEX_ALL, all);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2692) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2693) goto err_reg_all;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2695) err = __devinet_sysctl_register(net, "default",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2696) NETCONFA_IFINDEX_DEFAULT, dflt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2697) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2698) goto err_reg_dflt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2700) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2701) forw_hdr = register_net_sysctl(net, "net/ipv4", tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2702) if (!forw_hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2703) goto err_reg_ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2704) net->ipv4.forw_hdr = forw_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2705) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2706)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2707) net->ipv4.devconf_all = all;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2708) net->ipv4.devconf_dflt = dflt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2709) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2711) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2712) err_reg_ctl:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2713) __devinet_sysctl_unregister(net, dflt, NETCONFA_IFINDEX_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2714) err_reg_dflt:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2715) __devinet_sysctl_unregister(net, all, NETCONFA_IFINDEX_ALL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2716) err_reg_all:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2717) kfree(tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2718) err_alloc_ctl:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2719) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2720) kfree(dflt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2721) err_alloc_dflt:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2722) kfree(all);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2723) err_alloc_all:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2724) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2725) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2727) static __net_exit void devinet_exit_net(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2728) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2729) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2730) struct ctl_table *tbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2732) tbl = net->ipv4.forw_hdr->ctl_table_arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2733) unregister_net_sysctl_table(net->ipv4.forw_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2734) __devinet_sysctl_unregister(net, net->ipv4.devconf_dflt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2735) NETCONFA_IFINDEX_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2736) __devinet_sysctl_unregister(net, net->ipv4.devconf_all,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2737) NETCONFA_IFINDEX_ALL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2738) kfree(tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2739) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2740) kfree(net->ipv4.devconf_dflt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2741) kfree(net->ipv4.devconf_all);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2742) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2744) static __net_initdata struct pernet_operations devinet_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2745) .init = devinet_init_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2746) .exit = devinet_exit_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2747) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2749) static struct rtnl_af_ops inet_af_ops __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2750) .family = AF_INET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2751) .fill_link_af = inet_fill_link_af,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2752) .get_link_af_size = inet_get_link_af_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2753) .validate_link_af = inet_validate_link_af,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2754) .set_link_af = inet_set_link_af,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2755) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2757) void __init devinet_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2758) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2759) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2761) for (i = 0; i < IN4_ADDR_HSIZE; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2762) INIT_HLIST_HEAD(&inet_addr_lst[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2764) register_pernet_subsys(&devinet_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2766) register_gifconf(PF_INET, inet_gifconf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2767) register_netdevice_notifier(&ip_netdev_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2768)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2769) queue_delayed_work(system_power_efficient_wq, &check_lifetime_work, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2771) rtnl_af_register(&inet_af_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2772)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2773) rtnl_register(PF_INET, RTM_NEWADDR, inet_rtm_newaddr, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2774) rtnl_register(PF_INET, RTM_DELADDR, inet_rtm_deladdr, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2775) rtnl_register(PF_INET, RTM_GETADDR, NULL, inet_dump_ifaddr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2776) rtnl_register(PF_INET, RTM_GETNETCONF, inet_netconf_get_devconf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2777) inet_netconf_dump_devconf, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2778) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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