mirror of
https://github.com/vyos/vyos-build.git
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160 lines
5.3 KiB
Diff
160 lines
5.3 KiB
Diff
From 81d38c4a32e059ad7835f7dc254e7627642afbe9 Mon Sep 17 00:00:00 2001
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From: Stephen Hemminger <stephen@networkplumber.org>
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Date: Mon, 29 Apr 2013 18:50:15 -0700
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Subject: [PATCH] VyOS: Add linkstate IP device attribute
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Backport of earlier Vyatta patch.
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(cherry picked from commit 7c5a851086686be14ae937c80d6cee34814dbefc)
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---
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Documentation/networking/ip-sysctl.rst | 11 +++++++++++
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include/linux/inetdevice.h | 1 +
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include/linux/ipv6.h | 1 +
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include/uapi/linux/ip.h | 1 +
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include/uapi/linux/ipv6.h | 1 +
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net/ipv4/devinet.c | 1 +
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net/ipv6/addrconf.c | 8 ++++++++
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net/ipv6/route.c | 10 ++++++++++
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8 files changed, 34 insertions(+)
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diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
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index 25e6673a085a..4cd1134d3aac 100644
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--- a/Documentation/networking/ip-sysctl.rst
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+++ b/Documentation/networking/ip-sysctl.rst
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@@ -1425,6 +1425,17 @@ rp_filter - INTEGER
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Default value is 0. Note that some distributions enable it
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in startup scripts.
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+link_filter - INTEGER
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+ 0 - Allow packets to be received for the address on this interface
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+ even if interface is disabled or no carrier.
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+ 1 - Ignore packets received if interface associated with the incoming
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+ address is down.
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+ 2 - Ignore packets received if interface associated with the incoming
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+ address is down or has no carrier.
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+
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+ Default value is 0. Note that some distributions enable it
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+ in startup scripts.
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+
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arp_filter - BOOLEAN
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- 1 - Allows you to have multiple network interfaces on the same
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subnet, and have the ARPs for each interface be answered
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diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
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index 3515ca64e638..bfb49b5913e7 100644
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--- a/include/linux/inetdevice.h
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+++ b/include/linux/inetdevice.h
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@@ -133,6 +133,7 @@ static inline void ipv4_devconf_setall(struct in_device *in_dev)
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#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
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#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
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#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
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+#define IN_DEV_LINKFILTER(in_dev) IN_DEV_MAXCONF((in_dev), LINKFILTER)
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struct in_ifaddr {
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struct hlist_node hash;
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diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
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index dda61d150a13..9d96b27ec350 100644
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--- a/include/linux/ipv6.h
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+++ b/include/linux/ipv6.h
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@@ -77,6 +77,7 @@ struct ipv6_devconf {
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__s32 rpl_seg_enabled;
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struct ctl_table_header *sysctl_header;
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+ __s32 link_filter;
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};
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struct ipv6_params {
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diff --git a/include/uapi/linux/ip.h b/include/uapi/linux/ip.h
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index e42d13b55cf3..8f5291976f04 100644
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--- a/include/uapi/linux/ip.h
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+++ b/include/uapi/linux/ip.h
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@@ -169,6 +169,7 @@ enum
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IPV4_DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
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IPV4_DEVCONF_DROP_GRATUITOUS_ARP,
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IPV4_DEVCONF_BC_FORWARDING,
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+ IPV4_DEVCONF_LINKFILTER,
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__IPV4_DEVCONF_MAX
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};
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diff --git a/include/uapi/linux/ipv6.h b/include/uapi/linux/ipv6.h
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index 13e8751bf24a..2ea26a70bda2 100644
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--- a/include/uapi/linux/ipv6.h
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+++ b/include/uapi/linux/ipv6.h
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@@ -189,6 +189,7 @@ enum {
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DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN,
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DEVCONF_NDISC_TCLASS,
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DEVCONF_RPL_SEG_ENABLED,
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+ DEVCONF_LINK_FILTER,
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DEVCONF_MAX
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};
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diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
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index 123a6d39438f..1deb400805b0 100644
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--- a/net/ipv4/devinet.c
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+++ b/net/ipv4/devinet.c
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@@ -2547,6 +2547,7 @@ static struct devinet_sysctl_table {
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"route_localnet"),
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DEVINET_SYSCTL_FLUSHING_ENTRY(DROP_UNICAST_IN_L2_MULTICAST,
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"drop_unicast_in_l2_multicast"),
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+ DEVINET_SYSCTL_RW_ENTRY(LINKFILTER, "link_filter"),
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},
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};
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diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
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index 8b6eb384bac7..176a914acfee 100644
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--- a/net/ipv6/addrconf.c
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+++ b/net/ipv6/addrconf.c
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@@ -5516,6 +5516,7 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
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array[DEVCONF_DISABLE_POLICY] = cnf->disable_policy;
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array[DEVCONF_NDISC_TCLASS] = cnf->ndisc_tclass;
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array[DEVCONF_RPL_SEG_ENABLED] = cnf->rpl_seg_enabled;
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+ array[DEVCONF_LINK_FILTER] = cnf->link_filter;
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}
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static inline size_t inet6_ifla6_size(void)
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@@ -6896,6 +6897,13 @@ static const struct ctl_table addrconf_sysctl[] = {
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.mode = 0644,
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.proc_handler = proc_dointvec,
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},
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+ {
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+ .procname = "link_filter",
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+ .data = &ipv6_devconf.link_filter,
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+ .maxlen = sizeof(int),
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+ .mode = 0644,
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+ .proc_handler = proc_dointvec,
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+ },
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{
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/* sentinel */
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}
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diff --git a/net/ipv6/route.c b/net/ipv6/route.c
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index 7e0ce7af8234..c4ef9f4d40e1 100644
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--- a/net/ipv6/route.c
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+++ b/net/ipv6/route.c
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@@ -687,6 +687,14 @@ static inline void rt6_probe(struct fib6_nh *fib6_nh)
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}
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#endif
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+static inline int rt6_link_filter(const struct fib6_nh *nh)
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+{
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+ const struct net_device *dev = nh->fib_nh_dev;
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+ int linkf = __in6_dev_get(dev)->cnf.link_filter;
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+ return (linkf && !netif_running(dev))
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+ || (linkf > 1 && !netif_carrier_ok(dev));
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+}
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+
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/*
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* Default Router Selection (RFC 2461 6.3.6)
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*/
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@@ -728,6 +736,8 @@ static int rt6_score_route(const struct fib6_nh *nh, u32 fib6_flags, int oif,
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if (!m && (strict & RT6_LOOKUP_F_IFACE))
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return RT6_NUD_FAIL_HARD;
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+ if (rt6_link_filter(nh))
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+ return -1;
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#ifdef CONFIG_IPV6_ROUTER_PREF
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m |= IPV6_DECODE_PREF(IPV6_EXTRACT_PREF(fib6_flags)) << 2;
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#endif
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--
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2.20.1
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