Date: Tue, 15 Jul 2014 22:18:25 +0000 (UTC) From: Jakub Wojciech Klama <jceel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r268718 - user/jceel/soc2014_evdev/head/sys/dev/evdev Message-ID: <201407152218.s6FMIPoG037513@svn.freebsd.org>
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Author: jceel Date: Tue Jul 15 22:18:25 2014 New Revision: 268718 URL: http://svnweb.freebsd.org/changeset/base/268718 Log: Don't overwrite SYN_DROPPED packets by following actual packets to let userspace know that some packets were lost in the meantime. Modified: user/jceel/soc2014_evdev/head/sys/dev/evdev/evdev.c Modified: user/jceel/soc2014_evdev/head/sys/dev/evdev/evdev.c ============================================================================== --- user/jceel/soc2014_evdev/head/sys/dev/evdev/evdev.c Tue Jul 15 22:17:17 2014 (r268717) +++ user/jceel/soc2014_evdev/head/sys/dev/evdev/evdev.c Tue Jul 15 22:18:25 2014 (r268718) @@ -487,9 +487,17 @@ evdev_client_push(struct evdev_client *c debugf("client %p for device %s: buffer overflow", client, client->ec_evdev->ev_shortname); - microtime(&client->ec_buffer[tail].time); - client->ec_buffer[tail].type = EV_SYN; - client->ec_buffer[tail].code = SYN_DROPPED; + /* Check whether we placed SYN_DROPPED packet already */ + if (client->ec_buffer[tail - 2 % count].type == EV_SYN && + client->ec_buffer[tail - 2 % count].code == SYN_DROPPED) { + wakeup(client); + EVDEV_CLIENT_UNLOCKQ(client); + return; + } + + microtime(&client->ec_buffer[tail - 1].time); + client->ec_buffer[tail - 1].type = EV_SYN; + client->ec_buffer[tail - 1].code = SYN_DROPPED; wakeup(client); EVDEV_CLIENT_UNLOCKQ(client);
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