diff options
| author |   Nikolay Aleksandrov <razor@blackwall.org> | 2022-04-13 13:51:52 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2022-04-13 12:46:25 +0100 |
| commit | 2e9ea3e30f696fd438319c07836422bb0bbb4608 (patch) | |
| tree | 84cc9b965e5bac0557aef733992e6c371f7f26ef | |
| parent | net: rtnetlink: add msg kind names (diff) | |
| download | linux-dev-2e9ea3e30f696fd438319c07836422bb0bbb4608.tar.xz linux-dev-2e9ea3e30f696fd438319c07836422bb0bbb4608.zip | |
net: rtnetlink: add helper to extract msg type's kind
Add a helper which extracts the msg type's kind using the kind mask (0x3).
Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/rtnetlink.h | 6 | ||||
| -rw-r--r-- | net/core/rtnetlink.c | 2 |
2 files changed, 7 insertions, 1 deletions
diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h index 78712b51f3da..c51c5ff7f7e2 100644 --- a/include/net/rtnetlink.h +++ b/include/net/rtnetlink.h @@ -19,6 +19,12 @@ enum rtnl_kinds { RTNL_KIND_GET, RTNL_KIND_SET }; +#define RTNL_KIND_MASK 0x3 + +static inline enum rtnl_kinds rtnl_msgtype_kind(int msgtype) +{ + return msgtype & RTNL_KIND_MASK; +} void rtnl_register(int protocol, int msgtype, rtnl_doit_func, rtnl_dumpit_func, unsigned int flags); diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 2c36c9dc9b62..beda4a7da062 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -5947,7 +5947,7 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, return 0; family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; - kind = type&3; + kind = rtnl_msgtype_kind(type); if (kind != RTNL_KIND_GET && !netlink_net_capable(skb, CAP_NET_ADMIN)) return -EPERM; |