From 479840ffdbe4242e8a25349218c8e0859223aa35 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Fri, 6 Dec 2013 09:45:21 +0100 Subject: [PATCH] ipv6 addrconf: extend ifa_flags to u32 There is no more space in u8 ifa_flags. So do what davem suffested and add another netlink attr called IFA_FLAGS for carry more flags. Signed-off-by: Jiri Pirko Signed-off-by: Thomas Haller Signed-off-by: David S. Miller --- include/net/addrconf.h | 4 ++-- include/net/if_inet6.h | 2 +- include/uapi/linux/if_addr.h | 4 ++++ net/ipv6/addrconf.c | 32 ++++++++++++++++++++------------ 4 files changed, 27 insertions(+), 15 deletions(-) diff --git a/include/net/addrconf.h b/include/net/addrconf.h index 86505bfa5d2c..e70278eef12a 100644 --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -81,9 +81,9 @@ int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev, const struct in6_addr *daddr, unsigned int srcprefs, struct in6_addr *saddr); int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, - unsigned char banned_flags); + u32 banned_flags); int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, - unsigned char banned_flags); + u32 banned_flags); int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2); void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr); void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr); diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h index 76d54270f2e2..b58c36c1c3f6 100644 --- a/include/net/if_inet6.h +++ b/include/net/if_inet6.h @@ -50,8 +50,8 @@ struct inet6_ifaddr { int state; + __u32 flags; __u8 dad_probes; - __u8 flags; __u16 scope; diff --git a/include/uapi/linux/if_addr.h b/include/uapi/linux/if_addr.h index 23357ab81a77..8ab0c2cc9b73 100644 --- a/include/uapi/linux/if_addr.h +++ b/include/uapi/linux/if_addr.h @@ -18,6 +18,9 @@ struct ifaddrmsg { * It makes no difference for normally configured broadcast interfaces, * but for point-to-point IFA_ADDRESS is DESTINATION address, * local address is supplied in IFA_LOCAL attribute. + * + * IFA_FLAGS is a u32 attribute that extends the u8 field ifa_flags. + * If present, the value from struct ifaddrmsg will be ignored. */ enum { IFA_UNSPEC, @@ -28,6 +31,7 @@ enum { IFA_ANYCAST, IFA_CACHEINFO, IFA_MULTICAST, + IFA_FLAGS, __IFA_MAX, }; diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index d5fa5b8c443e..334a7e114e1d 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1407,7 +1407,7 @@ try_nextdev: EXPORT_SYMBOL(ipv6_dev_get_saddr); int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, - unsigned char banned_flags) + u32 banned_flags) { struct inet6_ifaddr *ifp; int err = -EADDRNOTAVAIL; @@ -1424,7 +1424,7 @@ int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, } int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, - unsigned char banned_flags) + u32 banned_flags) { struct inet6_dev *idev; int err = -EADDRNOTAVAIL; @@ -2178,7 +2178,7 @@ ok: } if (ifp) { - int flags; + u32 flags; unsigned long now; struct inet6_ifaddr *ift; u32 stored_lft; @@ -2363,10 +2363,11 @@ err_exit: /* * Manual configuration of address on an interface */ -static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx, +static int inet6_addr_add(struct net *net, int ifindex, + const struct in6_addr *pfx, const struct in6_addr *peer_pfx, - unsigned int plen, __u8 ifa_flags, __u32 prefered_lft, - __u32 valid_lft) + unsigned int plen, __u32 ifa_flags, + __u32 prefered_lft, __u32 valid_lft) { struct inet6_ifaddr *ifp; struct inet6_dev *idev; @@ -3351,7 +3352,7 @@ static void if6_seq_stop(struct seq_file *seq, void *v) static int if6_seq_show(struct seq_file *seq, void *v) { struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v; - seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n", + seq_printf(seq, "%pi6 %02x %02x %02x %03x %8s\n", &ifp->addr, ifp->idev->dev->ifindex, ifp->prefix_len, @@ -3572,6 +3573,7 @@ static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) }, [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, + [IFA_FLAGS] = { .len = sizeof(u32) }, }; static int @@ -3595,7 +3597,7 @@ inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh) return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen); } -static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags, +static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, u32 prefered_lft, u32 valid_lft) { u32 flags; @@ -3650,7 +3652,7 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) struct inet6_ifaddr *ifa; struct net_device *dev; u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; - u8 ifa_flags; + u32 ifa_flags; int err; err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy); @@ -3677,8 +3679,10 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) if (dev == NULL) return -ENODEV; + ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; + /* We ignore other flags so far. */ - ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS); + ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS; ifa = ipv6_get_ifaddr(net, pfx, dev, 1); if (ifa == NULL) { @@ -3702,7 +3706,7 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh) return err; } -static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags, +static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u32 flags, u8 scope, int ifindex) { struct ifaddrmsg *ifm; @@ -3745,7 +3749,8 @@ static inline int inet6_ifaddr_msgsize(void) return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) + nla_total_size(16) /* IFA_LOCAL */ + nla_total_size(16) /* IFA_ADDRESS */ - + nla_total_size(sizeof(struct ifa_cacheinfo)); + + nla_total_size(sizeof(struct ifa_cacheinfo)) + + nla_total_size(4) /* IFA_FLAGS */; } static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, @@ -3793,6 +3798,9 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) goto error; + if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0) + goto error; + return nlmsg_end(skb, nlh); error: -- 2.30.2