commit 9d615cc5c0a645060781797b23a73df158a1dfb6 Author: Andrea Shepard andrea@torproject.org Date: Mon Oct 1 20:27:51 2012 -0700

Set circuitmux policy on existing active channels when ewma_enabled changes --- src/or/config.c | 11 +++++++++++ src/or/networkstatus.c | 16 +++++++++++++++- 2 files changed, 26 insertions(+), 1 deletions(-)

diff --git a/src/or/config.c b/src/or/config.c index babbfb0..81528c8 100644 --- a/src/or/config.c +++ b/src/or/config.c @@ -12,6 +12,7 @@ #define CONFIG_PRIVATE

#include "or.h" +#include "channel.h" #include "circuitbuild.h" #include "circuitlist.h" #include "circuitmux.h" @@ -1169,6 +1170,7 @@ options_act(const or_options_t *old_options) char *msg=NULL; const int transition_affects_workers = old_options && options_transition_affects_workers(old_options, options); + int old_ewma_enabled;

/* disable ptrace and later, other basic debugging techniques */ { @@ -1376,8 +1378,17 @@ options_act(const or_options_t *old_options) connection_bucket_init(); #endif

+ old_ewma_enabled = cell_ewma_enabled(); /* Change the cell EWMA settings */ cell_ewma_set_scale_factor(options, networkstatus_get_latest_consensus()); + /* If we just enabled ewma, set the cmux policy on all active channels */ + if (cell_ewma_enabled() && !old_ewma_enabled) { + channel_set_cmux_policy_everywhere(&ewma_policy); + } else if (!cell_ewma_enabled() && old_ewma_enabled) { + /* Turn it off everywhere */ + channel_set_cmux_policy_everywhere(NULL); + } +

/* Update the BridgePassword's hashed version as needed. We store this as a * digest so that we can do side-channel-proof comparisons on it. diff --git a/src/or/networkstatus.c b/src/or/networkstatus.c index 619099b..0f6161e 100644 --- a/src/or/networkstatus.c +++ b/src/or/networkstatus.c @@ -11,6 +11,7 @@ */

#include "or.h" +#include "channel.h" #include "circuitbuild.h" #include "circuitmux.h" #include "circuitmux_ewma.h" @@ -1636,6 +1637,7 @@ networkstatus_set_current_consensus(const char *consensus, consensus_waiting_for_certs_t *waiting = NULL; time_t current_valid_after = 0; int free_consensus = 1; /* Free 'c' at the end of the function */ + int old_ewma_enabled;

if (flav < 0) { /* XXXX we don't handle unrecognized flavors yet. */ @@ -1829,7 +1831,19 @@ networkstatus_set_current_consensus(const char *consensus,

dirvote_recalculate_timing(options, now); routerstatus_list_update_named_server_map(); - cell_ewma_set_scale_factor(options, current_consensus); + + /* Update ewma and adjust policy if needed; first cache the old value */ + old_ewma_enabled = cell_ewma_enabled(); + /* Change the cell EWMA settings */ + cell_ewma_set_scale_factor(options, networkstatus_get_latest_consensus()); + /* If we just enabled ewma, set the cmux policy on all active channels */ + if (cell_ewma_enabled() && !old_ewma_enabled) { + channel_set_cmux_policy_everywhere(&ewma_policy); + } else if (!cell_ewma_enabled() && old_ewma_enabled) { + /* Turn it off everywhere */ + channel_set_cmux_policy_everywhere(NULL); + } +

/* XXXX024 this call might be unnecessary here: can changing the * current consensus really alter our view of any OR's rate limits? */