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relay: Make MaxOnionQueueDelay into a consensus param

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Part of #40704

Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
David Goulet 2022-11-09 10:25:30 -05:00
parent 4db03ac360
commit 93523ed0d6
2 changed files with 26 additions and 6 deletions
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2
src/app/config/config.c
View File

@ -549,7 +549,7 @@ static const config_var_t option_vars_[] = {
V(MaxConsensusAgeForDiffs, INTERVAL, "0 seconds"),
VAR("MaxMemInQueues", MEMUNIT, MaxMemInQueues_raw, "0"),
OBSOLETE("MaxOnionsPending"),
V(MaxOnionQueueDelay, MSEC_INTERVAL, "1750 msec"),
V(MaxOnionQueueDelay, MSEC_INTERVAL, "0"),
V(MaxUnparseableDescSizeToLog, MEMUNIT, "10 MB"),
VPORT(MetricsPort),
V(MetricsPortPolicy, LINELIST, NULL),

30
src/feature/relay/onion_queue.c
View File

@ -71,6 +71,25 @@ static int ol_entries[MAX_QUEUE_IDX+1];
static int num_ntors_per_tap(void);
static void onion_queue_entry_remove(onion_queue_t *victim);
/** Return the max onion queue delay value either from the torrc options (if
* the user explicitly set it) else from the consensus parameter. */
static uint64_t
get_max_onion_queue_delay(const or_options_t *options)
{
#define MAX_ONION_QUEUE_DELAY_DEFAULT 1750 /* msec */
#define MAX_ONION_QUEUE_DELAY_MIN 1 /* msec */
#define MAX_ONION_QUEUE_DELAY_MAX INT32_MAX /* msec */
if (options && options->MaxOnionQueueDelay > 0) {
return options->MaxOnionQueueDelay;
}
return networkstatus_get_param(NULL, "MaxOnionQueueDelay",
MAX_ONION_QUEUE_DELAY_DEFAULT,
MAX_ONION_QUEUE_DELAY_MIN,
MAX_ONION_QUEUE_DELAY_MAX);
}
/**
* We combine ntorv3 and ntor into the same queue, so we must
* use this function to covert the cell type to a queue index.
@ -103,6 +122,7 @@ have_room_for_onionskin(uint16_t type)
{
const or_options_t *options = get_options();
int num_cpus;
uint64_t max_onion_queue_delay;
uint64_t tap_usec, ntor_usec;
uint64_t ntor_during_tap_usec, tap_during_ntor_usec;
@ -110,6 +130,8 @@ have_room_for_onionskin(uint16_t type)
if (ol_entries[type] < 50)
return 1;
num_cpus = get_num_cpus(options);
max_onion_queue_delay = get_max_onion_queue_delay(options);
/* Compute how many microseconds we'd expect to need to clear all
* onionskins in various combinations of the queues. */
@ -140,19 +162,17 @@ have_room_for_onionskin(uint16_t type)
/* See whether that exceeds MaxOnionQueueDelay. If so, we can't queue
* this. */
if (type == ONION_HANDSHAKE_TYPE_NTOR &&
(ntor_usec + tap_during_ntor_usec) / 1000 >
(uint64_t)options->MaxOnionQueueDelay)
(ntor_usec + tap_during_ntor_usec) / 1000 > max_onion_queue_delay)
return 0;
if (type == ONION_HANDSHAKE_TYPE_TAP &&
(tap_usec + ntor_during_tap_usec) / 1000 >
(uint64_t)options->MaxOnionQueueDelay)
(tap_usec + ntor_during_tap_usec) / 1000 > max_onion_queue_delay)
return 0;
/* If we support the ntor handshake, then don't let TAP handshakes use
* more than 2/3 of the space on the queue. */
if (type == ONION_HANDSHAKE_TYPE_TAP &&
tap_usec / 1000 > (uint64_t)options->MaxOnionQueueDelay * 2 / 3)
tap_usec / 1000 > max_onion_queue_delay * 2 / 3)
return 0;
return 1;