commit 39f2411b3f5ab1a50c74fdafb432d5286c451ab7 Author: Roger Dingledine arma@torproject.org Date: Sat May 30 01:54:22 2020 -0400

Preemptive circs should work with UseEntryGuards 0

Resume being willing to use preemptively-built circuits when UseEntryGuards is set to 0. We accidentally disabled this feature with that config setting (in our fix for #24469), leading to slower load times.

Fixes bug 34303; bugfix on 0.3.3.2-alpha. --- changes/bug34303 | 5 +++++ src/core/or/circuitlist.c | 2 +- src/feature/client/entrynodes.c | 8 +++++++- 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/changes/bug34303 b/changes/bug34303 new file mode 100644 index 000000000..dce57f464 --- /dev/null +++ b/changes/bug34303 @@ -0,0 +1,5 @@ + o Minor bugfixes (client performance): + - Resume being willing to use preemptively-built circuits when + UseEntryGuards is set to 0. We accidentally disabled this feature + with that config setting, leading to slower load times. Fixes bug + 34303; bugfix on 0.3.3.2-alpha. diff --git a/src/core/or/circuitlist.c b/src/core/or/circuitlist.c index be5ac3b7f..03d495cdf 100644 --- a/src/core/or/circuitlist.c +++ b/src/core/or/circuitlist.c @@ -1883,7 +1883,7 @@ circuit_find_to_cannibalize(uint8_t purpose_to_produce, extend_info_t *info, }

/* Ignore any circuits for which we can't use the Guard. It is possible - * that the Guard was removed from the samepled set after the circuit + * that the Guard was removed from the sampled set after the circuit * was created so avoid using it. */ if (!entry_guard_could_succeed(circ->guard_state)) { goto next; diff --git a/src/feature/client/entrynodes.c b/src/feature/client/entrynodes.c index 7c2159ce8..8d9230b66 100644 --- a/src/feature/client/entrynodes.c +++ b/src/feature/client/entrynodes.c @@ -3452,10 +3452,16 @@ entry_guards_update_state(or_state_t *state) entry_guards_dirty = 0; }

-/** Return true iff the circuit's guard can succeed that is can be used. */ +/** Return true iff the circuit's guard can succeed, that is, can be used. */ int entry_guard_could_succeed(const circuit_guard_state_t *guard_state) { + if (get_options()->UseEntryGuards == 0) { + /* we're fine with this circuit's first hop, because we're not + * configured to use entry guards. */ + return 1; + } + if (!guard_state) { return 0; }