[tor-commits] [tor/master] Merge remote branch 'arma/bug2716' into maint-0.2.2

[nickm at torproject.org]

commit b639add1a010d5816ceb693c68ddc3b48655b752
Merge: d34a5cd 61f648a
Author: Nick Mathewson <nickm at torproject.org>
Date:   Mon Mar 14 15:29:02 2011 -0400

    Merge remote branch 'arma/bug2716' into maint-0.2.2

 changes/bug2716  |    5 +++++
 src/or/dirserv.c |   22 ++++++++++++++++------
 src/or/dirserv.h |   12 ++++++++++++
 src/or/main.c    |    7 +++++--
 4 files changed, 38 insertions(+), 8 deletions(-)

diff --combined src/or/dirserv.c
index 40136a1,09da66d..18abd18
--- a/src/or/dirserv.c
+++ b/src/or/dirserv.c
@@@ -43,8 -43,6 +43,8 @@@
  
  extern time_t time_of_process_start; /* from main.c */
  
 +extern long stats_n_seconds_working; /* from main.c */
 +
  /** Do we need to regenerate the v1 directory when someone asks for it? */
  static time_t the_directory_is_dirty = 1;
  /** Do we need to regenerate the v1 runningrouters document when somebody
@@@ -971,8 -969,18 +971,18 @@@ dirserv_set_router_is_running(routerinf
    }
  
    if (!answer && running_long_enough_to_decide_unreachable()) {
-     /* not considered reachable. tell rephist. */
-     rep_hist_note_router_unreachable(router->cache_info.identity_digest, now);
+     /* Not considered reachable. tell rephist about that.
+ 
+        Because we launch a reachability test for each router every
+        REACHABILITY_TEST_CYCLE_PERIOD seconds, then the router has probably
+        been down since at least that time after we last successfully reached
+        it.
+      */
+     time_t when = now;
+     if (router->last_reachable &&
+         router->last_reachable + REACHABILITY_TEST_CYCLE_PERIOD < now)
+       when = router->last_reachable + REACHABILITY_TEST_CYCLE_PERIOD;
+     rep_hist_note_router_unreachable(router->cache_info.identity_digest, when);
    }
  
    router->is_running = answer;
@@@ -1777,22 -1785,7 +1787,22 @@@ dirserv_thinks_router_is_unreliable(tim
  static int
  dirserv_thinks_router_is_hs_dir(routerinfo_t *router, time_t now)
  {
 -  long uptime = real_uptime(router, now);
 +
 +  long uptime;
 +
 +  /* If we haven't been running for at least
 +   * get_options()->MinUptimeHidServDirectoryV2 seconds, we can't
 +   * have accurate data telling us a relay has been up for at least
 +   * that long. We also want to allow a bit of slack: Reachability
 +   * tests aren't instant. If we haven't been running long enough,
 +   * trust the relay. */
 +
 +  if (stats_n_seconds_working >
 +      get_options()->MinUptimeHidServDirectoryV2 * 1.1)
 +    uptime = MIN(rep_hist_get_uptime(router->cache_info.identity_digest, now),
 +                 real_uptime(router, now));
 +  else
 +    uptime = real_uptime(router, now);
  
    /* XXX We shouldn't need to check dir_port, but we do because of
     * bug 1693. In the future, once relays set wants_to_be_hs_dir
@@@ -3204,8 -3197,8 +3214,8 @@@ dirserv_single_reachability_test(time_
   * try a few connections per call.
   *
   * The load balancing is such that if we get called once every ten
-  * seconds, we will cycle through all the tests in 1280 seconds (a
-  * bit over 20 minutes).
+  * seconds, we will cycle through all the tests in
+  * REACHABILITY_TEST_CYCLE_PERIOD seconds (a bit over 20 minutes).
   */
  void
  dirserv_test_reachability(time_t now)
@@@ -3231,11 -3224,11 +3241,11 @@@
        continue; /* bridge authorities only test reachability on bridges */
  //    if (router->cache_info.published_on > cutoff)
  //      continue;
-     if ((((uint8_t)id_digest[0]) % 128) == ctr) {
+     if ((((uint8_t)id_digest[0]) % REACHABILITY_MODULO_PER_TEST) == ctr) {
        dirserv_single_reachability_test(now, router);
      }
    } SMARTLIST_FOREACH_END(router);
-   ctr = (ctr + 1) % 128; /* increment ctr */
+   ctr = (ctr + 1) % REACHABILITY_MODULO_PER_TEST; /* increment ctr */
  }
  
  /** Given a fingerprint <b>fp</b> which is either set if we're looking for a