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ipv4: fib: Convert RTM_NEWROUTE and RTM_DELROUTE to per-netns RTNL.

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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 <kuniyu@amazon.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://patch.msgid.link/20250228042328.96624-13-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kuniyuki Iwashima 2025-02-27 20:23:28 -08:00 committed by Jakub Kicinski
parent 254ba7e603
commit 1dd2af7963
1 changed files with 14 additions and 5 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

19
net/ipv4/fib_frontend.c
View file

@ -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},
};