leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

net: ipv4: Fix rtnexthop len when RTA_FLOW is present

Browse Source 
Multipath RTA_FLOW is embedded in nexthop. Dump it in fib_add_nexthop()
to get the length of rtnexthop correct.

Fixes: b0f6019363 ("ipv4: Refactor nexthop attributes in fib_dump_info")
Signed-off-by: Xiao Liang <shaw.leon@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xiao Liang
2021-09-23 23:03:19 +08:00
committed by David S. Miller
parent 325fd36ae7
commit 597aa16c78
4 changed files with 14 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
net/ipv4/fib_semantics.c
View File

@@ -1661,7 +1661,7 @@ EXPORT_SYMBOL_GPL(fib_nexthop_info);
#if IS_ENABLED(CONFIG_IP_ROUTE_MULTIPATH) || IS_ENABLED(CONFIG_IPV6)
int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nhc,
int nh_weight, u8 rt_family)
int nh_weight, u8 rt_family, u32 nh_tclassid)
{
const struct net_device *dev = nhc->nhc_dev;
struct rtnexthop *rtnh;
@@ -1679,6 +1679,9 @@ int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nhc,
rtnh->rtnh_flags = flags;
if (nh_tclassid && nla_put_u32(skb, RTA_FLOW, nh_tclassid))
goto nla_put_failure;
/* length of rtnetlink header + attributes */
rtnh->rtnh_len = nlmsg_get_pos(skb) - (void *)rtnh;
@@ -1706,14 +1709,13 @@ static int fib_add_multipath(struct sk_buff *skb, struct fib_info *fi)
}
for_nexthops(fi) {
if (fib_add_nexthop(skb, &nh->nh_common, nh->fib_nh_weight,
AF_INET) < 0)
goto nla_put_failure;
u32 nh_tclassid = 0;
#ifdef CONFIG_IP_ROUTE_CLASSID
if (nh->nh_tclassid &&
nla_put_u32(skb, RTA_FLOW, nh->nh_tclassid))
goto nla_put_failure;
nh_tclassid = nh->nh_tclassid;
#endif
if (fib_add_nexthop(skb, &nh->nh_common, nh->fib_nh_weight,
AF_INET, nh_tclassid) < 0)
goto nla_put_failure;
} endfor_nexthops(fi);
mp_end: