mirror of
https://github.com/vyos/vyos-build.git
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159 lines
5.2 KiB
Diff
159 lines
5.2 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 ba0e8e6337c0..845599a58e0c 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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@@ -1526,6 +1526,17 @@ src_valid_mark - BOOLEAN
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Default value is 0.
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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 a038feb63f23..8720f70360a7 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 d1f386430795..6f24c8827d88 100644
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--- a/include/linux/ipv6.h
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+++ b/include/linux/ipv6.h
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@@ -81,6 +81,7 @@ struct ipv6_devconf {
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__u8 ioam6_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 b243a53fa985..9a3e0c89d17c 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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@@ -193,6 +193,7 @@ enum {
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DEVCONF_IOAM6_ENABLED,
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DEVCONF_IOAM6_ID,
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DEVCONF_IOAM6_ID_WIDE,
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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 4744c7839de5..4470bd7a9380 100644
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--- a/net/ipv4/devinet.c
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+++ b/net/ipv4/devinet.c
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@@ -2552,6 +2552,7 @@ 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 6dcf034835ec..c1820333fd55 100644
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--- a/net/ipv6/addrconf.c
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+++ b/net/ipv6/addrconf.c
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@@ -5579,6 +5579,7 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
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array[DEVCONF_IOAM6_ENABLED] = cnf->ioam6_enabled;
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array[DEVCONF_IOAM6_ID] = cnf->ioam6_id;
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array[DEVCONF_IOAM6_ID_WIDE] = cnf->ioam6_id_wide;
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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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@@ -7020,6 +7021,13 @@ static const struct ctl_table addrconf_sysctl[] = {
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.mode = 0644,
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.proc_handler = proc_douintvec,
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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 27274fc3619a..56e546ab8453 100644
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--- a/net/ipv6/route.c
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+++ b/net/ipv6/route.c
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@@ -672,6 +672,14 @@ 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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@@ -713,6 +721,8 @@ 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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2.30.2
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