A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-07 04:12:04 -04:00
Code Issues Projects Releases Packages Wiki Activity

BACKPORT: bpf: Add SO_KEEPALIVE and related options to bpf_setsockopt

Browse source 
This patch adds support of SO_KEEPALIVE flag and TCP related options
to bpf_setsockopt() routine. This is helpful if we want to enable or tune
TCP keepalive for applications which don't do it in the userspace code.

v3:
  - update kernel-doc in uapi (Nikita Vetoshkin <nekto0n@yandex-team.ru>)

v4:
  - update kernel-doc in tools too (Alexei Starovoitov)
  - add test to selftests (Alexei Starovoitov)

Change-Id: Ie16bf737964360c59ab9a8d796343863b3883b59
Signed-off-by: Dmitry Yakunin <zeil@yandex-team.ru>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20200620153052.9439-3-zeil@yandex-team.ru
This commit is contained in:
Dmitry Yakunin 2020-06-20 18:30:52 +03:00 • committed by basamaryan
commit e4810fd04e
No known key found for this signature in database
GPG key ID: 210D5384FB2A5885
3 changed files with 45 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

7
include/uapi/linux/bpf.h
View file

@ -1623,10 +1623,13 @@ union bpf_attr {
*
* * **SOL_SOCKET**, which supports the following *optname*\ s:
* **SO_RCVBUF**, **SO_SNDBUF**, **SO_MAX_PACING_RATE**,
* **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**.
* **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**,
* **SO_BINDTODEVICE**, **SO_KEEPALIVE**.
* * **IPPROTO_TCP**, which supports the following *optname*\ s:
* **TCP_CONGESTION**, **TCP_BPF_IW**,
* **TCP_BPF_SNDCWND_CLAMP**.
* **TCP_BPF_SNDCWND_CLAMP**, **TCP_SAVE_SYN**,
* **TCP_KEEPIDLE**, **TCP_KEEPINTVL**, **TCP_KEEPCNT**,
* **TCP_SYNCNT**, **TCP_USER_TIMEOUT**.
* * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
* * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
* Return

36
net/core/filter.c
View file

@ -4351,10 +4351,10 @@ static int _bpf_setsockopt(struct sock *sk, int level, int optname,
char *optval, int optlen, u32 flags)
{
char devname[IFNAMSIZ];
int val, valbool;
struct net *net;
int ifindex;
int ret = 0;
int val;
if (!sk_fullsock(sk))
return -EINVAL;
@ -4365,6 +4365,7 @@ static int _bpf_setsockopt(struct sock *sk, int level, int optname,
if (optlen != sizeof(int) && optname != SO_BINDTODEVICE)
return -EINVAL;
val = *((int *)optval);
valbool = val ? 1 : 0;
/* Only some socketops are supported */
switch (optname) {
@ -4426,6 +4427,11 @@ static int _bpf_setsockopt(struct sock *sk, int level, int optname,
}
ret = sock_bindtoindex(sk, ifindex, false);
break;
case SO_KEEPALIVE:
if (sk->sk_prot->keepalive)
sk->sk_prot->keepalive(sk, valbool);
sock_valbool_flag(sk, SOCK_KEEPOPEN, valbool);
break;
default:
ret = -EINVAL;
}
@ -4486,6 +4492,7 @@ static int _bpf_setsockopt(struct sock *sk, int level, int optname,
ret = tcp_set_congestion_control(sk, name, false,
reinit, true);
} else {
struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
if (optlen != sizeof(int))
@ -4514,6 +4521,33 @@ static int _bpf_setsockopt(struct sock *sk, int level, int optname,
else
tp->save_syn = val;
break;
case TCP_KEEPIDLE:
ret = tcp_sock_set_keepidle_locked(sk, val);
break;
case TCP_KEEPINTVL:
if (val < 1 || val > MAX_TCP_KEEPINTVL)
ret = -EINVAL;
else
tp->keepalive_intvl = val * HZ;
break;
case TCP_KEEPCNT:
if (val < 1 || val > MAX_TCP_KEEPCNT)
ret = -EINVAL;
else
tp->keepalive_probes = val;
break;
case TCP_SYNCNT:
if (val < 1 || val > MAX_TCP_SYNCNT)
ret = -EINVAL;
else
icsk->icsk_syn_retries = val;
break;
case TCP_USER_TIMEOUT:
if (val < 0)
ret = -EINVAL;
else
icsk->icsk_user_timeout = val;
break;
default:
ret = -EINVAL;
}

7
tools/include/uapi/linux/bpf.h
View file

@ -1608,10 +1608,13 @@ union bpf_attr {
*
* * **SOL_SOCKET**, which supports the following *optname*\ s:
* **SO_RCVBUF**, **SO_SNDBUF**, **SO_MAX_PACING_RATE**,
* **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**.
* **SO_PRIORITY**, **SO_RCVLOWAT**, **SO_MARK**,
* **SO_BINDTODEVICE**, **SO_KEEPALIVE**.
* * **IPPROTO_TCP**, which supports the following *optname*\ s:
* **TCP_CONGESTION**, **TCP_BPF_IW**,
* **TCP_BPF_SNDCWND_CLAMP**.
* **TCP_BPF_SNDCWND_CLAMP**, **TCP_SAVE_SYN**,
* **TCP_KEEPIDLE**, **TCP_KEEPINTVL**, **TCP_KEEPCNT**,
* **TCP_SYNCNT**, **TCP_USER_TIMEOUT**.
* * **IPPROTO_IP**, which supports *optname* **IP_TOS**.
* * **IPPROTO_IPV6**, which supports *optname* **IPV6_TCLASS**.
* Return