xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: add socket option for low latency polling

Browse Source 
adds a socket option for low latency polling.
This allows overriding the global sysctl value with a per-socket one.
Unexport sysctl_net_ll_poll since for now it's not needed in modules.

Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eliezer Tamir
2013-06-14 16:33:57 +03:00
committed by David S. Miller
parent 89bf1b5a68
commit dafcc4380d
19 changed files with 58 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
net/core/sock.c
View File

@@ -913,6 +913,19 @@ set_rcvbuf:
sock_valbool_flag(sk, SOCK_SELECT_ERR_QUEUE, valbool);
break;
#ifdef CONFIG_NET_LL_RX_POLL
case SO_LL:
/* allow unprivileged users to decrease the value */
if ((val > sk->sk_ll_usec) && !capable(CAP_NET_ADMIN))
ret = -EPERM;
else {
if (val < 0)
ret = -EINVAL;
else
sk->sk_ll_usec = val;
}
break;
#endif
default:
ret = -ENOPROTOOPT;
break;
@@ -1170,6 +1183,12 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
v.val = sock_flag(sk, SOCK_SELECT_ERR_QUEUE);
break;
#ifdef CONFIG_NET_LL_RX_POLL
case SO_LL:
v.val = sk->sk_ll_usec;
break;
#endif
default:
return -ENOPROTOOPT;
}
@@ -2288,6 +2307,7 @@ void sock_init_data(struct socket *sock, struct sock *sk)
#ifdef CONFIG_NET_LL_RX_POLL
sk->sk_napi_id = 0;
sk->sk_ll_usec = sysctl_net_ll_poll;
#endif
/*