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net: rtnetlink: add msg kind names

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Add rtnl kind names instead of using raw values. We'll need to
check for DEL kind later to validate bulk flag support.

Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2022-04-13 13:51:51 +03:00 committed by David S. Miller
parent ae10162c7e
commit 12dc5c2cb7
2 changed files with 10 additions and 3 deletions
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7
include/net/rtnetlink.h
View file

@ -13,6 +13,13 @@ enum rtnl_link_flags {
RTNL_FLAG_DOIT_UNLOCKED = 1,
};
enum rtnl_kinds {
RTNL_KIND_NEW,
RTNL_KIND_DEL,
RTNL_KIND_GET,
RTNL_KIND_SET
};
void rtnl_register(int protocol, int msgtype,
rtnl_doit_func, rtnl_dumpit_func, unsigned int flags);
int rtnl_register_module(struct module *owner, int protocol, int msgtype,

6
net/core/rtnetlink.c
View file

@ -5928,11 +5928,11 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
{
struct net *net = sock_net(skb->sk);
struct rtnl_link *link;
enum rtnl_kinds kind;
struct module *owner;
int err = -EOPNOTSUPP;
rtnl_doit_func doit;
unsigned int flags;
int kind;
int family;
int type;
@ -5949,11 +5949,11 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
kind = type&3;
if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
if (kind != RTNL_KIND_GET && !netlink_net_capable(skb, CAP_NET_ADMIN))
return -EPERM;
rcu_read_lock();
if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
if (kind == RTNL_KIND_GET && (nlh->nlmsg_flags & NLM_F_DUMP)) {
struct sock *rtnl;
rtnl_dumpit_func dumpit;
u32 min_dump_alloc = 0;