From 1dd2af7963e95df90590fe40425fe1bdf982ae8f Mon Sep 17 00:00:00 2001 From: Kuniyuki Iwashima Date: Thu, 27 Feb 2025 20:23:28 -0800 Subject: [PATCH] ipv4: fib: Convert RTM_NEWROUTE and RTM_DELROUTE to per-netns RTNL. We converted fib_info hash tables to per-netns one and now ready to convert RTM_NEWROUTE and RTM_DELROUTE to per-netns RTNL. Let's hold rtnl_net_lock() in inet_rtm_newroute() and inet_rtm_delroute(). Signed-off-by: Kuniyuki Iwashima Reviewed-by: Eric Dumazet Reviewed-by: David Ahern Link: https://patch.msgid.link/20250228042328.96624-13-kuniyu@amazon.com Signed-off-by: Jakub Kicinski --- net/ipv4/fib_frontend.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index a6372d934e45..6de77415b5b3 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -884,20 +884,24 @@ static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, if (err < 0) goto errout; + rtnl_net_lock(net); + if (cfg.fc_nh_id && !nexthop_find_by_id(net, cfg.fc_nh_id)) { NL_SET_ERR_MSG(extack, "Nexthop id does not exist"); err = -EINVAL; - goto errout; + goto unlock; } tb = fib_get_table(net, cfg.fc_table); if (!tb) { NL_SET_ERR_MSG(extack, "FIB table does not exist"); err = -ESRCH; - goto errout; + goto unlock; } err = fib_table_delete(net, tb, &cfg, extack); +unlock: + rtnl_net_unlock(net); errout: return err; } @@ -914,15 +918,20 @@ static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, if (err < 0) goto errout; + rtnl_net_lock(net); + tb = fib_new_table(net, cfg.fc_table); if (!tb) { err = -ENOBUFS; - goto errout; + goto unlock; } err = fib_table_insert(net, tb, &cfg, extack); if (!err && cfg.fc_type == RTN_LOCAL) net->ipv4.fib_has_custom_local_routes = true; + +unlock: + rtnl_net_unlock(net); errout: return err; } @@ -1683,9 +1692,9 @@ static struct pernet_operations fib_net_ops = { static const struct rtnl_msg_handler fib_rtnl_msg_handlers[] __initconst = { {.protocol = PF_INET, .msgtype = RTM_NEWROUTE, - .doit = inet_rtm_newroute}, + .doit = inet_rtm_newroute, .flags = RTNL_FLAG_DOIT_PERNET}, {.protocol = PF_INET, .msgtype = RTM_DELROUTE, - .doit = inet_rtm_delroute}, + .doit = inet_rtm_delroute, .flags = RTNL_FLAG_DOIT_PERNET}, {.protocol = PF_INET, .msgtype = RTM_GETROUTE, .dumpit = inet_dump_fib, .flags = RTNL_FLAG_DUMP_UNLOCKED | RTNL_FLAG_DUMP_SPLIT_NLM_DONE}, }; -- 2.25.1