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improve code comments, based on comments from nick

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This commit is contained in:
Roger Dingledine 2010-09-28 23:27:00 -04:00
parent 7e644b3f69
commit 512433346f
3 changed files with 26 additions and 19 deletions
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4
src/or/circuitbuild.c
View File

@ -4605,7 +4605,7 @@ entries_retry_helper(or_options_t *options, int act)
if (ri->is_running)
any_running = 1; /* some entry is both known and running */
else if (act) {
/* Mark-for-close all TLS connections to this node, since
/* Mark all current connections to this OR as unhealthy, since
* otherwise there could be one that started 30 seconds
* ago, and in 30 seconds it will time out, causing us to mark
* the node down and undermine the retry attempt. We mark even
@ -4613,7 +4613,7 @@ entries_retry_helper(or_options_t *options, int act)
* we'll want to attach circuits to fresh conns. */
connection_or_set_bad_connections(ri->cache_info.identity_digest, 1);
/* mark it for retry */
/* mark this entry node for retry */
router_set_status(ri->cache_info.identity_digest, 1);
e->can_retry = 1;
e->bad_since = 0;

10
src/or/circuituse.c
View File

@ -959,9 +959,13 @@ circuit_build_failed(origin_circuit_t *circ)
if (circ->_base.n_conn) {
or_connection_t *n_conn = circ->_base.n_conn;
if (n_conn->is_bad_for_new_circs) {
/* no need to blow away circuits/streams/etc. Also, don't mark this
* router as newly down, since maybe this was just an old circuit
* attempt that's finally timing out now. */
/* We only want to blame this router when a fresh healthy
* connection fails. So don't mark this router as newly failed,
* since maybe this was just an old circuit attempt that's
* finally timing out now. Also, there's no need to blow away
* circuits/streams/etc, since the failure of an unhealthy conn
* doesn't tell us much about whether a healthy conn would
* succeed. */
already_marked = 1;
}
log_info(LD_OR,

31
src/or/connection_or.c
View File

@ -606,8 +606,21 @@ connection_or_get_for_extend(const char *digest,
#define TIME_BEFORE_OR_CONN_IS_TOO_OLD (60*60*24*7)
/** Given the head of the linked list for all the or_connections with a given
* identity, set elements of that list as is_bad_for_new_circs() as
* appropriate. Helper for connection_or_set_bad_connections().
* identity, set elements of that list as is_bad_for_new_circs as
* appropriate. Helper for connection_or_set_bad_connections().
*
* Specifically, we set the is_bad_for_new_circs flag on:
* - all connections if <b>force</b> is true.
* - all connections that are too old.
* - all open non-canonical connections for which a canonical connection
* exists to the same router.
* - all open canonical connections for which a 'better' canonical
* connection exists to the same router.
* - all open non-canonical connections for which a 'better' non-canonical
* connection exists to the same router at the same address.
*
* See connection_or_is_better() for our idea of what makes one OR connection
* better than another.
*/
static void
connection_or_group_set_badness(or_connection_t *head, int force)
@ -721,18 +734,8 @@ connection_or_group_set_badness(or_connection_t *head, int force)
/** Go through all the OR connections (or if <b>digest</b> is non-NULL, just
* the OR connections with that digest), and set the is_bad_for_new_circs
* flag on:
* - all connections if <b>force</b> is true.
* - all connections that are too old.
* - all open non-canonical connections for which a canonical connection
* exists to the same router.
* - all open canonical connections for which a 'better' canonical
* connection exists to the same router.
* - all open non-canonical connections for which a 'better' non-canonical
* connection exists to the same router at the same address.
*
* See connection_or_is_better() for our idea of what makes one OR connection
* better than another.
* flag based on the rules in connection_or_group_set_badness() (or just
* always set it if <b>force</b> is true).
*/
void
connection_or_set_bad_connections(const char *digest, int force)