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authorNicolas Dichtel <nicolas.dichtel@6wind.com>2012-12-04 05:13:39 +0400
committerDavid S. Miller <davem@davemloft.net>2012-12-04 22:08:11 +0400
commit1eb99af52c4bc705f4042f37f255975acfc738f2 (patch)
tree7ccdd3e0185a44644cb68d9e3e1f6c46cab71943 /net/ipv4/ipmr.c
parent9a68ac72a44ecb6d4dc4a7cadf45e1a2cd183885 (diff)
downloadlinux-1eb99af52c4bc705f4042f37f255975acfc738f2.tar.xz
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: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ipmr.c')
-rw-r--r--net/ipv4/ipmr.c21
1 files changed, 20 insertions, 1 deletions
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 91782a7634c2..084dac3bc151 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -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++;