diff options
Diffstat (limited to 'net/ipv4/ipmr.c')
| -rw-r--r-- | net/ipv4/ipmr.c | 144 |
1 files changed, 142 insertions, 2 deletions
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index 3a02d52ed50e..9374b99c7c17 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -1980,6 +1980,20 @@ int ip_mr_input(struct sk_buff *skb) struct net *net = dev_net(skb->dev); int local = skb_rtable(skb)->rt_flags & RTCF_LOCAL; struct mr_table *mrt; + struct net_device *dev; + + /* skb->dev passed in is the loX master dev for vrfs. + * As there are no vifs associated with loopback devices, + * get the proper interface that does have a vif associated with it. + */ + dev = skb->dev; + if (netif_is_l3_master(skb->dev)) { + dev = dev_get_by_index_rcu(net, IPCB(skb)->iif); + if (!dev) { + kfree_skb(skb); + return -ENODEV; + } + } /* Packet is looped back after forward, it should not be * forwarded second time, but still can be delivered locally. @@ -2017,7 +2031,7 @@ int ip_mr_input(struct sk_buff *skb) /* already under rcu_read_lock() */ cache = ipmr_cache_find(mrt, ip_hdr(skb)->saddr, ip_hdr(skb)->daddr); if (!cache) { - int vif = ipmr_find_vif(mrt, skb->dev); + int vif = ipmr_find_vif(mrt, dev); if (vif >= 0) cache = ipmr_cache_find_any(mrt, ip_hdr(skb)->daddr, @@ -2037,7 +2051,7 @@ int ip_mr_input(struct sk_buff *skb) } read_lock(&mrt_lock); - vif = ipmr_find_vif(mrt, skb->dev); + vif = ipmr_find_vif(mrt, dev); if (vif >= 0) { int err2 = ipmr_cache_unresolved(mrt, vif, skb); read_unlock(&mrt_lock); @@ -2514,6 +2528,129 @@ static int ipmr_rtm_route(struct sk_buff *skb, struct nlmsghdr *nlh, return ipmr_mfc_delete(tbl, &mfcc, parent); } +static bool ipmr_fill_table(struct mr_table *mrt, struct sk_buff *skb) +{ + u32 queue_len = atomic_read(&mrt->cache_resolve_queue_len); + + if (nla_put_u32(skb, IPMRA_TABLE_ID, mrt->id) || + nla_put_u32(skb, IPMRA_TABLE_CACHE_RES_QUEUE_LEN, queue_len) || + nla_put_s32(skb, IPMRA_TABLE_MROUTE_REG_VIF_NUM, + mrt->mroute_reg_vif_num) || + nla_put_u8(skb, IPMRA_TABLE_MROUTE_DO_ASSERT, + mrt->mroute_do_assert) || + nla_put_u8(skb, IPMRA_TABLE_MROUTE_DO_PIM, mrt->mroute_do_pim)) + return false; + + return true; +} + +static bool ipmr_fill_vif(struct mr_table *mrt, u32 vifid, struct sk_buff *skb) +{ + struct nlattr *vif_nest; + struct vif_device *vif; + + /* if the VIF doesn't exist just continue */ + if (!VIF_EXISTS(mrt, vifid)) + return true; + + vif = &mrt->vif_table[vifid]; + vif_nest = nla_nest_start(skb, IPMRA_VIF); + if (!vif_nest) + return false; + if (nla_put_u32(skb, IPMRA_VIFA_IFINDEX, vif->dev->ifindex) || + nla_put_u32(skb, IPMRA_VIFA_VIF_ID, vifid) || + nla_put_u16(skb, IPMRA_VIFA_FLAGS, vif->flags) || + nla_put_u64_64bit(skb, IPMRA_VIFA_BYTES_IN, vif->bytes_in, + IPMRA_VIFA_PAD) || + nla_put_u64_64bit(skb, IPMRA_VIFA_BYTES_OUT, vif->bytes_out, + IPMRA_VIFA_PAD) || + nla_put_u64_64bit(skb, IPMRA_VIFA_PACKETS_IN, vif->pkt_in, + IPMRA_VIFA_PAD) || + nla_put_u64_64bit(skb, IPMRA_VIFA_PACKETS_OUT, vif->pkt_out, + IPMRA_VIFA_PAD) || + nla_put_be32(skb, IPMRA_VIFA_LOCAL_ADDR, vif->local) || + nla_put_be32(skb, IPMRA_VIFA_REMOTE_ADDR, vif->remote)) { + nla_nest_cancel(skb, vif_nest); + return false; + } + nla_nest_end(skb, vif_nest); + + return true; +} + +static int ipmr_rtm_dumplink(struct sk_buff *skb, struct netlink_callback *cb) +{ + struct net *net = sock_net(skb->sk); + struct nlmsghdr *nlh = NULL; + unsigned int t = 0, s_t; + unsigned int e = 0, s_e; + struct mr_table *mrt; + + s_t = cb->args[0]; + s_e = cb->args[1]; + + ipmr_for_each_table(mrt, net) { + struct nlattr *vifs, *af; + struct ifinfomsg *hdr; + u32 i; + + if (t < s_t) + goto skip_table; + nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, RTM_NEWLINK, + sizeof(*hdr), NLM_F_MULTI); + if (!nlh) + break; + + hdr = nlmsg_data(nlh); + memset(hdr, 0, sizeof(*hdr)); + hdr->ifi_family = RTNL_FAMILY_IPMR; + + af = nla_nest_start(skb, IFLA_AF_SPEC); + if (!af) { + nlmsg_cancel(skb, nlh); + goto out; + } + + if (!ipmr_fill_table(mrt, skb)) { + nlmsg_cancel(skb, nlh); + goto out; + } + + vifs = nla_nest_start(skb, IPMRA_TABLE_VIFS); + if (!vifs) { + nla_nest_end(skb, af); + nlmsg_end(skb, nlh); + goto out; + } + for (i = 0; i < mrt->maxvif; i++) { + if (e < s_e) + goto skip_entry; + if (!ipmr_fill_vif(mrt, i, skb)) { + nla_nest_end(skb, vifs); + nla_nest_end(skb, af); + nlmsg_end(skb, nlh); + goto out; + } +skip_entry: + e++; + } + s_e = 0; + e = 0; + nla_nest_end(skb, vifs); + nla_nest_end(skb, af); + nlmsg_end(skb, nlh); +skip_table: + t++; + } + +out: + cb->args[1] = e; + cb->args[0] = t; + + return skb->len; +} + #ifdef CONFIG_PROC_FS /* The /proc interfaces to multicast routing : * /proc/net/ip_mr_cache & /proc/net/ip_mr_vif @@ -2856,6 +2993,9 @@ int __init ip_mr_init(void) ipmr_rtm_route, NULL, NULL); rtnl_register(RTNL_FAMILY_IPMR, RTM_DELROUTE, ipmr_rtm_route, NULL, NULL); + + rtnl_register(RTNL_FAMILY_IPMR, RTM_GETLINK, + NULL, ipmr_rtm_dumplink, NULL); return 0; #ifdef CONFIG_IP_PIMSM_V2 |