Commit 1eb99af5 authored by Nicolas Dichtel's avatar Nicolas Dichtel Committed by David S. Miller
Browse files

ipmr/ip6mr: allow to get unresolved cache via netlink 



/proc/net/ip[6]_mr_cache allows to get all mfc entries, even if they are put in
the unresolved list (mfc[6]_unres_queue). But only the table RT_TABLE_DEFAULT is
displayed.
This patch adds the parsing of the unresolved list when the dump is made via
rtnetlink, hence each table can be checked.

In IPv6, we set rtm_type in ip6mr_fill_mroute(), because in case of unresolved
mfc __ip6mr_fill_mroute() will not set it. In IPv4, it is already done.

Signed-off-by: default avatarNicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9a68ac72

net/ipv4/ipmr.c

+20 −1
Original line number Diff line number Diff line
@@ -2154,6 +2154,7 @@ static int ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, 
{

	struct nlmsghdr *nlh;

	struct rtmsg *rtm;

	int err;



	nlh = nlmsg_put(skb, portid, seq, RTM_NEWROUTE, sizeof(*rtm), NLM_F_MULTI);

	if (nlh == NULL)
@@ -2178,7 +2179,9 @@ static int ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, 
	if (nla_put_be32(skb, RTA_SRC, c->mfc_origin) ||

	    nla_put_be32(skb, RTA_DST, c->mfc_mcastgrp))

		goto nla_put_failure;

	if (__ipmr_fill_mroute(mrt, skb, c, rtm) < 0)

	err = __ipmr_fill_mroute(mrt, skb, c, rtm);

	/* do not break the dump if cache is unresolved */

	if (err < 0 && err != -ENOENT)

		goto nla_put_failure;



	return nlmsg_end(skb, nlh);
@@ -2221,6 +2224,22 @@ next_entry: 
			}

			e = s_e = 0;

		}

		spin_lock_bh(&mfc_unres_lock);

		list_for_each_entry(mfc, &mrt->mfc_unres_queue, list) {

			if (e < s_e)

				goto next_entry2;

			if (ipmr_fill_mroute(mrt, skb,

					     NETLINK_CB(cb->skb).portid,

					     cb->nlh->nlmsg_seq,

					     mfc) < 0) {

				spin_unlock_bh(&mfc_unres_lock);

				goto done;

			}

next_entry2:

			e++;

		}

		spin_unlock_bh(&mfc_unres_lock);

		e = s_e = 0;

		s_h = 0;

next_table:

		t++;

net/ipv6/ip6mr.c

+21 −1
Original line number Diff line number Diff line
@@ -2235,6 +2235,7 @@ static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, 
{

	struct nlmsghdr *nlh;

	struct rtmsg *rtm;

	int err;



	nlh = nlmsg_put(skb, portid, seq, RTM_NEWROUTE, sizeof(*rtm), NLM_F_MULTI);

	if (nlh == NULL)
@@ -2248,6 +2249,7 @@ static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, 
	rtm->rtm_table    = mrt->id;

	if (nla_put_u32(skb, RTA_TABLE, mrt->id))

		goto nla_put_failure;

	rtm->rtm_type = RTN_MULTICAST;

	rtm->rtm_scope    = RT_SCOPE_UNIVERSE;

	if (c->mfc_flags & MFC_STATIC)

		rtm->rtm_protocol = RTPROT_STATIC;
@@ -2258,7 +2260,9 @@ static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, 
	if (nla_put(skb, RTA_SRC, 16, &c->mf6c_origin) ||

	    nla_put(skb, RTA_DST, 16, &c->mf6c_mcastgrp))

		goto nla_put_failure;

	if (__ip6mr_fill_mroute(mrt, skb, c, rtm) < 0)

	err = __ip6mr_fill_mroute(mrt, skb, c, rtm);

	/* do not break the dump if cache is unresolved */

	if (err < 0 && err != -ENOENT)

		goto nla_put_failure;



	return nlmsg_end(skb, nlh);
@@ -2301,6 +2305,22 @@ next_entry: 
			}

			e = s_e = 0;

		}

		spin_lock_bh(&mfc_unres_lock);

		list_for_each_entry(mfc, &mrt->mfc6_unres_queue, list) {

			if (e < s_e)

				goto next_entry2;

			if (ip6mr_fill_mroute(mrt, skb,

					      NETLINK_CB(cb->skb).portid,

					      cb->nlh->nlmsg_seq,

					      mfc) < 0) {

				spin_unlock_bh(&mfc_unres_lock);

				goto done;

			}

next_entry2:

			e++;

		}

		spin_unlock_bh(&mfc_unres_lock);

		e = s_e = 0;

		s_h = 0;

next_table:

		t++;

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