diff options
| author | David Ahern <dsahern@gmail.com> | 2018-12-16 01:09:06 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-12-16 23:15:25 +0300 |
| commit | df9b0e30d44c901ac27c0f38cd54511b3f130c6d (patch) | |
| tree | a5c91efa13023045b3e5f5a14c7461fb84546219 /net/core | |
| parent | 11fb60d1089f52dd9003d02cf2590c9b56eda840 (diff) | |
| download | linux-df9b0e30d44c901ac27c0f38cd54511b3f130c6d.tar.xz | |
neighbor: Add protocol attribute
Similar to routes and rules, add protocol attribute to neighbor entries
for easier tracking of how each was created.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/neighbour.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c index 42b413774370..fb4372cb1de1 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -1828,6 +1828,7 @@ static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, struct net_device *dev = NULL; struct neighbour *neigh; void *dst, *lladdr; + u8 protocol = 0; int err; ASSERT_RTNL(); @@ -1867,6 +1868,14 @@ static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, dst = nla_data(tb[NDA_DST]); lladdr = tb[NDA_LLADDR] ? nla_data(tb[NDA_LLADDR]) : NULL; + if (tb[NDA_PROTOCOL]) { + if (nla_len(tb[NDA_PROTOCOL]) != sizeof(u8)) { + NL_SET_ERR_MSG(extack, "Invalid protocol attribute"); + goto out; + } + protocol = nla_get_u8(tb[NDA_PROTOCOL]); + } + if (ndm->ndm_flags & NTF_PROXY) { struct pneigh_entry *pn; @@ -1874,6 +1883,8 @@ static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, pn = pneigh_lookup(tbl, net, dst, dev, 1); if (pn) { pn->flags = ndm->ndm_flags; + if (protocol) + pn->protocol = protocol; err = 0; } goto out; @@ -1924,6 +1935,10 @@ static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, } else err = __neigh_update(neigh, lladdr, ndm->ndm_state, flags, NETLINK_CB(skb).portid, extack); + + if (protocol) + neigh->protocol = protocol; + neigh_release(neigh); out: @@ -2417,6 +2432,9 @@ static int neigh_fill_info(struct sk_buff *skb, struct neighbour *neigh, nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) goto nla_put_failure; + if (neigh->protocol && nla_put_u8(skb, NDA_PROTOCOL, neigh->protocol)) + goto nla_put_failure; + nlmsg_end(skb, nlh); return 0; @@ -2448,6 +2466,9 @@ static int pneigh_fill_info(struct sk_buff *skb, struct pneigh_entry *pn, if (nla_put(skb, NDA_DST, tbl->key_len, pn->key)) goto nla_put_failure; + if (pn->protocol && nla_put_u8(skb, NDA_PROTOCOL, pn->protocol)) + goto nla_put_failure; + nlmsg_end(skb, nlh); return 0; @@ -3103,7 +3124,8 @@ static inline size_t neigh_nlmsg_size(void) + nla_total_size(MAX_ADDR_LEN) /* NDA_DST */ + nla_total_size(MAX_ADDR_LEN) /* NDA_LLADDR */ + nla_total_size(sizeof(struct nda_cacheinfo)) - + nla_total_size(4); /* NDA_PROBES */ + + nla_total_size(4) /* NDA_PROBES */ + + nla_total_size(1); /* NDA_PROTOCOL */ } static void __neigh_notify(struct neighbour *n, int type, int flags, |