diff options
| author |   Christoph Hellwig <hch@lst.de> | 2020-05-28 07:12:26 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-05-28 11:11:45 -0700 |
| commit | 6ebf71bab9fb476fc8132be4c12b88201278f0ca (patch) | |
| tree | 46494a55e668794da37d9f3bda2185a3aedb6930 /net/ipv4 | |
| parent | tcp: add tcp_sock_set_keepcnt (diff) | |
| download | linux-dev-6ebf71bab9fb476fc8132be4c12b88201278f0ca.tar.xz linux-dev-6ebf71bab9fb476fc8132be4c12b88201278f0ca.zip | |
ipv4: add ip_sock_set_tos
Add a helper to directly set the IP_TOS sockopt from kernel space without
going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/ip_sockglue.c | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index f43d5f12aa86..b43a29e11f4a 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -560,6 +560,26 @@ out: return err; } +static void __ip_sock_set_tos(struct sock *sk, int val) +{ + if (sk->sk_type == SOCK_STREAM) { + val &= ~INET_ECN_MASK; + val |= inet_sk(sk)->tos & INET_ECN_MASK; + } + if (inet_sk(sk)->tos != val) { + inet_sk(sk)->tos = val; + sk->sk_priority = rt_tos2priority(val); + sk_dst_reset(sk); + } +} + +void ip_sock_set_tos(struct sock *sk, int val) +{ + lock_sock(sk); + __ip_sock_set_tos(sk, val); + release_sock(sk); +} +EXPORT_SYMBOL(ip_sock_set_tos); /* * Socket option code for IP. This is the end of the line after any @@ -823,15 +843,7 @@ static int do_ip_setsockopt(struct sock *sk, int level, inet->cmsg_flags &= ~IP_CMSG_RECVFRAGSIZE; break; case IP_TOS: /* This sets both TOS and Precedence */ - if (sk->sk_type == SOCK_STREAM) { - val &= ~INET_ECN_MASK; - val |= inet->tos & INET_ECN_MASK; - } - if (inet->tos != val) { - inet->tos = val; - sk->sk_priority = rt_tos2priority(val); - sk_dst_reset(sk); - } + __ip_sock_set_tos(sk, val); break; case IP_TTL: if (optlen < 1) |