[PATCH] netifd: add segment routing support
Hans Dedecker
dedeckeh at gmail.com
Sun Dec 13 12:08:46 EST 2020
On Sat, Dec 12, 2020 at 9:51 PM <vincent at systemli.org> wrote:
>
> From: Nick Hainke <vincent at systemli.org>
>
> seg6_enabled - Bool
> Accept or drop SR-enabled IPv6 packets on this interface.
>
> More Information:
> https://www.kernel.org/doc/html/latest/networking/seg6-sysctl.html
>
> Now you can set as interface option
> option ip6segmentrouting '1'
>
> It is not enough to turn on "seg6_enabled" on the interface. Further,
> we have to enable "/all/seg6_enabled". This means that a working config
> is "interface + all".
>
> Signed-off-by: Nick Hainke <vincent at systemli.org>
Patch applied with some minor tweaks
(https://git.openwrt.org/?p=project/netifd.git;a=commit;h=458b1a7e9473c150a40cae5d8be174f4bb03bd39);
thx
Hans
> ---
> device.c | 21 +++++++++++++++++++++
> device.h | 5 +++++
> system-linux.c | 22 ++++++++++++++++++++++
> 3 files changed, 48 insertions(+)
>
> diff --git a/device.c b/device.c
> index 73cc4bf..7145788 100644
> --- a/device.c
> +++ b/device.c
> @@ -36,6 +36,7 @@ static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
> [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
> [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
> [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
> + [DEV_ATTR_IP6SEGMENTROUTING] = { .name = "ip6segmentrouting", .type = BLOBMSG_TYPE_BOOL },
> [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
> [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
> [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
> @@ -230,6 +231,7 @@ device_merge_settings(struct device *dev, struct device_settings *n)
> (s->flags & (DEV_OPT_MACADDR|DEV_OPT_DEFAULT_MACADDR) ? s->macaddr : os->macaddr),
> sizeof(n->macaddr));
> n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
> + n->ip6segmentrouting = s->flags & DEV_OPT_IP6SEGMENTROUTING ? s->ip6segmentrouting : os->ip6segmentrouting;
> n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
> n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
> n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
> @@ -299,6 +301,11 @@ device_init_settings(struct device *dev, struct blob_attr **tb)
> s->flags |= DEV_OPT_IPV6;
> }
>
> + if ((cur = tb[DEV_ATTR_IP6SEGMENTROUTING])) {
> + s->ip6segmentrouting = blobmsg_get_bool(cur);
> + s->flags |= DEV_OPT_IP6SEGMENTROUTING;
> + }
> +
> if ((cur = tb[DEV_ATTR_PROMISC])) {
> s->promisc = blobmsg_get_bool(cur);
> s->flags |= DEV_OPT_PROMISC;
> @@ -844,6 +851,18 @@ device_init_pending(void)
> }
> }
>
> +bool
> +check_ip6segmentrouting(void)
> +{
> + struct device *dev, *tmp;
> + bool ip6segmentrouting = false;
> +
> + avl_for_each_element_safe(&devices, dev, avl, tmp) {
> + ip6segmentrouting |= dev->settings.ip6segmentrouting;
> + }
> + return ip6segmentrouting;
> +}
> +
> static enum dev_change_type
> device_set_config(struct device *dev, struct device_type *type,
> struct blob_attr *attr)
> @@ -1053,6 +1072,8 @@ device_dump_status(struct blob_buf *b, struct device *dev)
> blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
> if (st.flags & DEV_OPT_IPV6)
> blobmsg_add_u8(b, "ipv6", st.ipv6);
> + if (st.flags & DEV_OPT_IP6SEGMENTROUTING)
> + blobmsg_add_u8(b, "ip6segmentrouting", st.ip6segmentrouting);
> if (st.flags & DEV_OPT_PROMISC)
> blobmsg_add_u8(b, "promisc", st.promisc);
> if (st.flags & DEV_OPT_RPFILTER)
> diff --git a/device.h b/device.h
> index ab5a162..6ee439d 100644
> --- a/device.h
> +++ b/device.h
> @@ -53,6 +53,7 @@ enum {
> DEV_ATTR_SENDREDIRECTS,
> DEV_ATTR_NEIGHLOCKTIME,
> DEV_ATTR_ISOLATE,
> + DEV_ATTR_IP6SEGMENTROUTING,
> __DEV_ATTR_MAX,
> };
>
> @@ -107,6 +108,7 @@ enum {
> DEV_OPT_SENDREDIRECTS = (1 << 21),
> DEV_OPT_NEIGHLOCKTIME = (1 << 22),
> DEV_OPT_ISOLATE = (1 << 23),
> + DEV_OPT_IP6SEGMENTROUTING = (1 << 24),
> };
>
> /* events broadcasted to all users of a device */
> @@ -173,6 +175,7 @@ struct device_settings {
> bool learning;
> bool unicast_flood;
> bool sendredirects;
> + bool ip6segmentrouting;
> bool isolate;
> };
>
> @@ -320,4 +323,6 @@ device_set_disabled(struct device *dev, bool value)
> device_refresh_present(dev);
> }
>
> +bool check_ip6segmentrouting(void);
> +
> #endif
> diff --git a/system-linux.c b/system-linux.c
> index bf746f9..53a02e9 100644
> --- a/system-linux.c
> +++ b/system-linux.c
> @@ -304,6 +304,11 @@ static void system_set_disable_ipv6(struct device *dev, const char *val)
> system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
> }
>
> +static void system_set_ip6segmentrouting(struct device *dev, const char *val)
> +{
> + system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/seg6_enabled", dev->ifname, val);
> +}
> +
> static void system_set_rpfilter(struct device *dev, const char *val)
> {
> system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
> @@ -509,6 +514,12 @@ static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t b
> dev->ifname, buf, buf_sz);
> }
>
> +static int system_get_ip6segmentrouting(struct device *dev, char *buf, const size_t buf_sz)
> +{
> + return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/seg6_enabled",
> + dev->ifname, buf, buf_sz);
> +}
> +
> static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
> {
> return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
> @@ -1572,6 +1583,11 @@ system_if_get_settings(struct device *dev, struct device_settings *s)
> s->flags |= DEV_OPT_IPV6;
> }
>
> + if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
> + s->ip6segmentrouting = strtoul(buf, NULL, 0);
> + s->flags |= DEV_OPT_IP6SEGMENTROUTING;
> + }
> +
> if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
> s->promisc = ifr.ifr_flags & IFF_PROMISC;
> s->flags |= DEV_OPT_PROMISC;
> @@ -1667,6 +1683,12 @@ system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned
> }
> if (apply_mask & DEV_OPT_IPV6)
> system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
> + if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
> + system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
> + struct device dummy = {.ifname="all"};
> + bool ip6segmentrouting = check_ip6segmentrouting();
> + system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
> + }
> if (apply_mask & DEV_OPT_PROMISC) {
> if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
> !s->promisc ? IFF_PROMISC : 0) < 0)
> --
> 2.29.2
>
>
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