diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-05-28 08:12:29 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-28 21:11:45 +0300 |
| commit | 2de569bda2a66d1308ad3f205bb29cf4f95f5636 (patch) | |
| tree | efe6912815210ff223b905d3c08cab3824fa262b /net | |
| parent | db45c0ef258ef6c7ef3c1b8ea9e06e133e083c27 (diff) | |
| download | linux-2de569bda2a66d1308ad3f205bb29cf4f95f5636.tar.xz | |
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')
| -rw-r--r-- | net/ipv4/ip_sockglue.c | 11 | ||||
| -rw-r--r-- | net/rxrpc/local_object.c | 8 | ||||
| -rw-r--r-- | net/rxrpc/output.c | 14 |
3 files changed, 17 insertions, 16 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. diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c index 4c0e8fe5ec1f..6f4e6b4817cf 100644 --- a/net/rxrpc/local_object.c +++ b/net/rxrpc/local_object.c @@ -174,13 +174,7 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net) ip_sock_set_recverr(local->socket->sk); /* we want to set the don't fragment bit */ - opt = IP_PMTUDISC_DO; - ret = kernel_setsockopt(local->socket, SOL_IP, IP_MTU_DISCOVER, - (char *) &opt, sizeof(opt)); - if (ret < 0) { - _debug("setsockopt failed"); - goto error; - } + ip_sock_set_mtu_discover(local->socket->sk, IP_PMTUDISC_DO); /* We want receive timestamps. */ sock_enable_timestamps(local->socket->sk); diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c index f8b632a5c619..1ba43c3df4ad 100644 --- a/net/rxrpc/output.c +++ b/net/rxrpc/output.c @@ -321,7 +321,7 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb, struct kvec iov[2]; rxrpc_serial_t serial; size_t len; - int ret, opt; + int ret; _enter(",{%d}", skb->len); @@ -473,18 +473,14 @@ send_fragmentable: switch (conn->params.local->srx.transport.family) { case AF_INET6: case AF_INET: - opt = IP_PMTUDISC_DONT; - kernel_setsockopt(conn->params.local->socket, - SOL_IP, IP_MTU_DISCOVER, - (char *)&opt, sizeof(opt)); + ip_sock_set_mtu_discover(conn->params.local->socket->sk, + IP_PMTUDISC_DONT); ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, 2, len); conn->params.peer->last_tx_at = ktime_get_seconds(); - opt = IP_PMTUDISC_DO; - kernel_setsockopt(conn->params.local->socket, - SOL_IP, IP_MTU_DISCOVER, - (char *)&opt, sizeof(opt)); + ip_sock_set_mtu_discover(conn->params.local->socket->sk, + IP_PMTUDISC_DO); break; default: |