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authorJesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>2018-07-03 15:43:00 -0700
committerDavid S. Miller <davem@davemloft.net>2018-07-04 22:30:28 +0900
commit4b15c7075352668d4467ced7594b676707d11cae (patch)
tree18de5104ec6df0136c947556e6c9bc0dbad8fd2e /net/core/sock.c
parent3048cf84d152344f874e993558770bba73a65c8f (diff)
downloadlinux-4b15c7075352668d4467ced7594b676707d11cae.tar.bz2
net/sched: Make etf report drops on error_queue
Use the socket error queue for reporting dropped packets if the socket has enabled that feature through the SO_TXTIME API. Packets are dropped either on enqueue() if they aren't accepted by the qdisc or on dequeue() if the system misses their deadline. Those are reported as different errors so applications can react accordingly. Userspace can retrieve the errors through the socket error queue and the corresponding cmsg interfaces. A struct sock_extended_err* is used for returning the error data, and the packet's timestamp can be retrieved by adding both ee_data and ee_info fields as e.g.: ((__u64) serr->ee_data << 32) + serr->ee_info This feature is disabled by default and must be explicitly enabled by applications. Enabling it can bring some overhead for the Tx cycles of the application. Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/sock.c')
-rw-r--r--net/core/sock.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/core/sock.c b/net/core/sock.c
index fe64b839f1b2..03fdea5b0f57 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1087,6 +1087,8 @@ set_rcvbuf:
sk->sk_clockid = sk_txtime.clockid;
sk->sk_txtime_deadline_mode =
!!(sk_txtime.flags & SOF_TXTIME_DEADLINE_MODE);
+ sk->sk_txtime_report_errors =
+ !!(sk_txtime.flags & SOF_TXTIME_REPORT_ERRORS);
}
break;
@@ -1429,6 +1431,8 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
v.txtime.clockid = sk->sk_clockid;
v.txtime.flags |= sk->sk_txtime_deadline_mode ?
SOF_TXTIME_DEADLINE_MODE : 0;
+ v.txtime.flags |= sk->sk_txtime_report_errors ?
+ SOF_TXTIME_REPORT_ERRORS : 0;
break;
default: