diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-05-28 07:12:29 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-28 11:11:45 -0700 |
| commit | 2de569bda2a66d1308ad3f205bb29cf4f95f5636 (patch) | |
| tree | efe6912815210ff223b905d3c08cab3824fa262b /net/ipv4/ip_sockglue.c | |
| parent | db45c0ef258ef6c7ef3c1b8ea9e06e133e083c27 (diff) | |
| download | lwn-2de569bda2a66d1308ad3f205bb29cf4f95f5636.tar.gz lwn-2de569bda2a66d1308ad3f205bb29cf4f95f5636.zip | |
ipv4: add ip_sock_set_mtu_discover
Add a helper to directly set the IP_MTU_DISCOVER sockopt from kernel
space without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Howells <dhowells@redhat.com> [rxrpc bits]
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_sockglue.c')
| -rw-r--r-- | net/ipv4/ip_sockglue.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index aca6b81da9ba..aa115be11dcf 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -597,6 +597,17 @@ void ip_sock_set_recverr(struct sock *sk) } EXPORT_SYMBOL(ip_sock_set_recverr); +int ip_sock_set_mtu_discover(struct sock *sk, int val) +{ + if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_OMIT) + return -EINVAL; + lock_sock(sk); + inet_sk(sk)->pmtudisc = val; + release_sock(sk); + return 0; +} +EXPORT_SYMBOL(ip_sock_set_mtu_discover); + /* * Socket option code for IP. This is the end of the line after any * TCP,UDP etc options on an IP socket. |