diff options
| author |   Martin KaFai Lau <kafai@fb.com> | 2022-08-16 23:18:26 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2022-08-18 17:06:13 -0700 |
| commit | ee7f1e1302f5cb29168f70827c12855f1d8c9845 (patch) | |
| tree | 39f161413d5ef2e5ceec659d5d8b9bdc76cdfaed /include/net | |
| parent | bpf: Change bpf_setsockopt(SOL_TCP) to reuse do_tcp_setsockopt() (diff) | |
| download | linux-dev-ee7f1e1302f5cb29168f70827c12855f1d8c9845.tar.xz linux-dev-ee7f1e1302f5cb29168f70827c12855f1d8c9845.zip | |
bpf: Change bpf_setsockopt(SOL_IP) to reuse do_ip_setsockopt()
After the prep work in the previous patches,
this patch removes the dup code from bpf_setsockopt(SOL_IP)
and reuses the implementation in do_ip_setsockopt().
The existing optname white-list is refactored into a new
function sol_ip_setsockopt().
NOTE,
the current bpf_setsockopt(IP_TOS) is quite different from the
the do_ip_setsockopt(IP_TOS). For example, it does not take
the INET_ECN_MASK into the account for tcp and also does not adjust
sk->sk_priority. It looks like the current bpf_setsockopt(IP_TOS)
was referencing the IPV6_TCLASS implementation instead of IP_TOS.
This patch tries to rectify that by using the do_ip_setsockopt(IP_TOS).
While this is a behavior change, the do_ip_setsockopt(IP_TOS) behavior
is arguably what the user is expecting. At least, the INET_ECN_MASK bits
should be masked out for tcp.
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/r/20220817061826.4180990-1-kafai@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/ip.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/ip.h b/include/net/ip.h index 1c979fd1904c..34fa5b0f0a0e 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -743,6 +743,8 @@ void ip_cmsg_recv_offset(struct msghdr *msg, struct sock *sk, int ip_cmsg_send(struct sock *sk, struct msghdr *msg, struct ipcm_cookie *ipc, bool allow_ipv6); DECLARE_STATIC_KEY_FALSE(ip4_min_ttl); +int do_ip_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval, + unsigned int optlen); int ip_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval, unsigned int optlen); int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, |