This patch adds a few optnames for bpf_setsockopt:
SO_REUSEADDR, IPV6_AUTOFLOWLABEL, TCP_MAXSEG, TCP_NODELAY,
and TCP_THIN_LINEAR_TIMEOUTS.
Thanks to the previous patches of this set, all additions can reuse
the sk_setsockopt(), do_ipv6_setsockopt(), and do_tcp_setsockopt().
The only change here is to allow them in bpf_setsockopt.
The bpf prog has been able to read all members of a sk by
using PTR_TO_BTF_ID of a sk. The optname additions here can also be
read by the same approach. Meaning there is a way to read
the values back.
These optnames can also be added to bpf_getsockopt() later with
another patch set that makes the bpf_getsockopt() to reuse
the sock_getsockopt(), tcp_getsockopt(), and ip[v6]_getsockopt().
Thus, this patch does not add more duplicated code to
bpf_getsockopt() now.
Reviewed-by: Stanislav Fomichev <sdf@xxxxxxxxxx>
Signed-off-by: Martin KaFai Lau <kafai@xxxxxx>
---
net/core/filter.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/net/core/filter.c b/net/core/filter.c
index 23282b8cf61e..1acfaffeaf32 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -5017,6 +5017,7 @@ static int sol_socket_setsockopt(struct sock *sk, int optname,
char *optval, int optlen)
{
switch (optname) {
+ case SO_REUSEADDR:
case SO_SNDBUF:
case SO_RCVBUF:
case SO_KEEPALIVE:
@@ -5093,11 +5094,14 @@ static int sol_tcp_setsockopt(struct sock *sk, int optname,
return -EINVAL;
switch (optname) {
+ case TCP_NODELAY:
+ case TCP_MAXSEG:
case TCP_KEEPIDLE:
case TCP_KEEPINTVL:
case TCP_KEEPCNT:
case TCP_SYNCNT:
case TCP_WINDOW_CLAMP:
+ case TCP_THIN_LINEAR_TIMEOUTS:
case TCP_USER_TIMEOUT:
case TCP_NOTSENT_LOWAT:
case TCP_SAVE_SYN:
@@ -5141,6 +5145,7 @@ static int sol_ipv6_setsockopt(struct sock *sk, int optname,
switch (optname) {
case IPV6_TCLASS:
+ case IPV6_AUTOFLOWLABEL:
if (optlen != sizeof(int))
return -EINVAL;
break;
--
2.30.2
