From 437fd90c0250dee670290f9b714253671a990160 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Wed, 18 May 2016 13:18:31 +0300 Subject: These changes are the raw update to qemu-2.6. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Collission happened in the following patches: migration: do cleanup operation after completion(738df5b9) Bug fix.(1750c932f86) kvmclock: add a new function to update env->tsc.(b52baab2) The code provided by the patches was already in the upstreamed version. Change-Id: I3cc11841a6a76ae20887b2e245710199e1ea7f9a Signed-off-by: José Pekkarinen --- qemu/roms/ipxe/src/net/retry.c | 90 ++++++++++++++++++++++++------------------ 1 file changed, 52 insertions(+), 38 deletions(-) (limited to 'qemu/roms/ipxe/src/net/retry.c') diff --git a/qemu/roms/ipxe/src/net/retry.c b/qemu/roms/ipxe/src/net/retry.c index 8f210bdcc..734567be5 100644 --- a/qemu/roms/ipxe/src/net/retry.c +++ b/qemu/roms/ipxe/src/net/retry.c @@ -15,9 +15,13 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA. + * + * You can also choose to distribute this program under the terms of + * the Unmodified Binary Distribution Licence (as given in the file + * COPYING.UBDL), provided that you have satisfied its requirements. */ -FILE_LICENCE ( GPL2_OR_LATER ); +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #include #include @@ -35,7 +39,6 @@ FILE_LICENCE ( GPL2_OR_LATER ); * * This implementation of the timer is designed to satisfy RFC 2988 * and therefore be usable as a TCP retransmission timer. - * * */ @@ -49,47 +52,59 @@ FILE_LICENCE ( GPL2_OR_LATER ); static LIST_HEAD ( timers ); /** - * Start timer + * Start timer with a specified timeout * * @v timer Retry timer + * @v timeout Timeout, in ticks * - * This starts the timer running with the current timeout value. If + * This starts the timer running with the specified timeout value. If * stop_timer() is not called before the timer expires, the timer will * be stopped and the timer's callback function will be called. */ -void start_timer ( struct retry_timer *timer ) { +void start_timer_fixed ( struct retry_timer *timer, unsigned long timeout ) { + + /* Add to list of running timers (if applicable) */ if ( ! timer->running ) { list_add ( &timer->list, &timers ); ref_get ( timer->refcnt ); + timer->running = 1; } + + /* Record start time */ timer->start = currticks(); - timer->running = 1; - - /* 0 means "use default timeout" */ - if ( timer->min_timeout == 0 ) - timer->min_timeout = DEFAULT_MIN_TIMEOUT; - /* We must never be less than MIN_TIMEOUT under any circumstances */ - if ( timer->min_timeout < MIN_TIMEOUT ) - timer->min_timeout = MIN_TIMEOUT; - /* Honor user-specified minimum timeout */ - if ( timer->timeout < timer->min_timeout ) - timer->timeout = timer->min_timeout; - - DBG2 ( "Timer %p started at time %ld (expires at %ld)\n", - timer, timer->start, ( timer->start + timer->timeout ) ); + + /* Record timeout */ + timer->timeout = timeout; + + DBGC2 ( timer, "Timer %p started at time %ld (expires at %ld)\n", + timer, timer->start, ( timer->start + timer->timeout ) ); } /** - * Start timer with a specified fixed timeout + * Start timer * * @v timer Retry timer - * @v timeout Timeout, in ticks + * + * This starts the timer running with the current timeout value + * (rounded up to the minimum timeout value). If stop_timer() is not + * called before the timer expires, the timer will be stopped and the + * timer's callback function will be called. */ -void start_timer_fixed ( struct retry_timer *timer, unsigned long timeout ) { - start_timer ( timer ); - timer->timeout = timeout; - DBG2 ( "Timer %p expiry time changed to %ld\n", - timer, ( timer->start + timer->timeout ) ); +void start_timer ( struct retry_timer *timer ) { + unsigned long timeout = timer->timeout; + unsigned long min; + + /* Calculate minimum timeout */ + min = ( timer->min ? timer->min : DEFAULT_MIN_TIMEOUT ); + if ( min < MIN_TIMEOUT ) + min = MIN_TIMEOUT; + + /* Ensure timeout is at least the minimum */ + if ( timeout < min ) + timeout = min; + + /* Start timer with this timeout */ + start_timer_fixed ( timer, timeout ); } /** @@ -111,8 +126,8 @@ void stop_timer ( struct retry_timer *timer ) { list_del ( &timer->list ); runtime = ( now - timer->start ); timer->running = 0; - DBG2 ( "Timer %p stopped at time %ld (ran for %ld)\n", - timer, now, runtime ); + DBGC2 ( timer, "Timer %p stopped at time %ld (ran for %ld)\n", + timer, now, runtime ); /* Update timer. Variables are: * @@ -135,8 +150,8 @@ void stop_timer ( struct retry_timer *timer ) { timer->timeout -= ( timer->timeout >> 3 ); timer->timeout += ( runtime >> 1 ); if ( timer->timeout != old_timeout ) { - DBG ( "Timer %p timeout updated to %ld\n", - timer, timer->timeout ); + DBGC ( timer, "Timer %p timeout updated to %ld\n", + timer, timer->timeout ); } } @@ -150,11 +165,12 @@ void stop_timer ( struct retry_timer *timer ) { */ static void timer_expired ( struct retry_timer *timer ) { struct refcnt *refcnt = timer->refcnt; + unsigned long max = ( timer->max ? timer->max : DEFAULT_MAX_TIMEOUT ); int fail; /* Stop timer without performing RTT calculations */ - DBG2 ( "Timer %p stopped at time %ld on expiry\n", - timer, currticks() ); + DBGC2 ( timer, "Timer %p stopped at time %ld on expiry\n", + timer, currticks() ); assert ( timer->running ); list_del ( &timer->list ); timer->running = 0; @@ -162,12 +178,10 @@ static void timer_expired ( struct retry_timer *timer ) { /* Back off the timeout value */ timer->timeout <<= 1; - if ( timer->max_timeout == 0 ) /* 0 means "use default timeout" */ - timer->max_timeout = DEFAULT_MAX_TIMEOUT; - if ( ( fail = ( timer->timeout > timer->max_timeout ) ) ) - timer->timeout = timer->max_timeout; - DBG ( "Timer %p timeout backed off to %ld\n", - timer, timer->timeout ); + if ( ( fail = ( timer->timeout > max ) ) ) + timer->timeout = max; + DBGC ( timer, "Timer %p timeout backed off to %ld\n", + timer, timer->timeout ); /* Call expiry callback */ timer->expired ( timer, fail ); -- cgit 1.2.3-korg