mirror of
https://gitlab.torproject.org/tpo/core/tor.git
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Merge remote-tracking branch 'andrea/cmux_refactor_configurable_threshold'
Conflicts: src/or/or.h src/test/Makefile.nmake
This commit is contained in:
Nick Mathewson
commit
a28df3fb67
4
changes/global_scheduler
Normal file
4
changes/global_scheduler
Normal file
@ -0,0 +1,4 @@
|
||||
o Major changes:
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- Implement a new inter-cmux comparison API, a global high/low watermark
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mechanism and a global scheduler loop for transmission prioritization
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across all channels as well as among circuits on one channel.
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@ -128,7 +128,8 @@ for $fn (@ARGV) {
|
||||
if ($1 ne "if" and $1 ne "while" and $1 ne "for" and
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$1 ne "switch" and $1 ne "return" and $1 ne "int" and
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||||
$1 ne "elsif" and $1 ne "WINAPI" and $2 ne "WINAPI" and
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||||
$1 ne "void" and $1 ne "__attribute__" and $1 ne "op") {
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||||
$1 ne "void" and $1 ne "__attribute__" and $1 ne "op" and
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||||
$1 ne "size_t" and $1 ne "double") {
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print " fn ():$fn:$.\n";
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}
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}
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||||
|
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@ -283,8 +283,8 @@ tor_libevent_initialize(tor_libevent_cfg *torcfg)
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}
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/** Return the current Libevent event base that we're set up to use. */
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struct event_base *
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tor_libevent_get_base(void)
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MOCK_IMPL(struct event_base *,
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tor_libevent_get_base, (void))
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{
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return the_event_base;
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||||
}
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@ -72,7 +72,7 @@ typedef struct tor_libevent_cfg {
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} tor_libevent_cfg;
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void tor_libevent_initialize(tor_libevent_cfg *cfg);
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struct event_base *tor_libevent_get_base(void);
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MOCK_DECL(struct event_base *, tor_libevent_get_base, (void));
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const char *tor_libevent_get_method(void);
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||||
void tor_check_libevent_version(const char *m, int server,
|
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const char **badness_out);
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@ -97,8 +97,10 @@
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#define LD_HEARTBEAT (1u<<20)
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/** Abstract channel_t code */
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#define LD_CHANNEL (1u<<21)
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/** Scheduler */
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#define LD_SCHED (1u<<22)
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/** Number of logging domains in the code. */
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#define N_LOGGING_DOMAINS 22
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#define N_LOGGING_DOMAINS 23
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|
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/** This log message is not safe to send to a callback-based logger
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* immediately. Used as a flag, not a log domain. */
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||||
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@ -63,6 +63,7 @@ LIBTOR_OBJECTS = \
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routerlist.obj \
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routerparse.obj \
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||||
routerset.obj \
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||||
scheduler.obj \
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||||
statefile.obj \
|
||||
status.obj \
|
||||
transports.obj
|
||||
|
||||
@ -562,8 +562,8 @@ buf_clear(buf_t *buf)
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||||
}
|
||||
|
||||
/** Return the number of bytes stored in <b>buf</b> */
|
||||
size_t
|
||||
buf_datalen(const buf_t *buf)
|
||||
MOCK_IMPL(size_t,
|
||||
buf_datalen, (const buf_t *buf))
|
||||
{
|
||||
return buf->datalen;
|
||||
}
|
||||
|
||||
@ -24,7 +24,7 @@ void buf_shrink(buf_t *buf);
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||||
size_t buf_shrink_freelists(int free_all);
|
||||
void buf_dump_freelist_sizes(int severity);
|
||||
|
||||
size_t buf_datalen(const buf_t *buf);
|
||||
MOCK_DECL(size_t, buf_datalen, (const buf_t *buf));
|
||||
size_t buf_allocation(const buf_t *buf);
|
||||
size_t buf_slack(const buf_t *buf);
|
||||
|
||||
|
||||
473
src/or/channel.c
473
src/or/channel.c
@ -13,6 +13,9 @@
|
||||
|
||||
#define TOR_CHANNEL_INTERNAL_
|
||||
|
||||
/* This one's for stuff only channel.c and the test suite should see */
|
||||
#define CHANNEL_PRIVATE_
|
||||
|
||||
#include "or.h"
|
||||
#include "channel.h"
|
||||
#include "channeltls.h"
|
||||
@ -29,29 +32,7 @@
|
||||
#include "rephist.h"
|
||||
#include "router.h"
|
||||
#include "routerlist.h"
|
||||
|
||||
/* Cell queue structure */
|
||||
|
||||
typedef struct cell_queue_entry_s cell_queue_entry_t;
|
||||
struct cell_queue_entry_s {
|
||||
TOR_SIMPLEQ_ENTRY(cell_queue_entry_s) next;
|
||||
enum {
|
||||
CELL_QUEUE_FIXED,
|
||||
CELL_QUEUE_VAR,
|
||||
CELL_QUEUE_PACKED
|
||||
} type;
|
||||
union {
|
||||
struct {
|
||||
cell_t *cell;
|
||||
} fixed;
|
||||
struct {
|
||||
var_cell_t *var_cell;
|
||||
} var;
|
||||
struct {
|
||||
packed_cell_t *packed_cell;
|
||||
} packed;
|
||||
} u;
|
||||
};
|
||||
#include "scheduler.h"
|
||||
|
||||
/* Global lists of channels */
|
||||
|
||||
@ -76,6 +57,60 @@ static smartlist_t *finished_listeners = NULL;
|
||||
/* Counter for ID numbers */
|
||||
static uint64_t n_channels_allocated = 0;
|
||||
|
||||
/*
|
||||
* Channel global byte/cell counters, for statistics and for scheduler high
|
||||
* /low-water marks.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Total number of cells ever given to any channel with the
|
||||
* channel_write_*_cell() functions.
|
||||
*/
|
||||
|
||||
static uint64_t n_channel_cells_queued = 0;
|
||||
|
||||
/*
|
||||
* Total number of cells ever passed to a channel lower layer with the
|
||||
* write_*_cell() methods.
|
||||
*/
|
||||
|
||||
static uint64_t n_channel_cells_passed_to_lower_layer = 0;
|
||||
|
||||
/*
|
||||
* Current number of cells in all channel queues; should be
|
||||
* n_channel_cells_queued - n_channel_cells_passed_to_lower_layer.
|
||||
*/
|
||||
|
||||
static uint64_t n_channel_cells_in_queues = 0;
|
||||
|
||||
/*
|
||||
* Total number of bytes for all cells ever queued to a channel and
|
||||
* counted in n_channel_cells_queued.
|
||||
*/
|
||||
|
||||
static uint64_t n_channel_bytes_queued = 0;
|
||||
|
||||
/*
|
||||
* Total number of bytes for all cells ever passed to a channel lower layer
|
||||
* and counted in n_channel_cells_passed_to_lower_layer.
|
||||
*/
|
||||
|
||||
static uint64_t n_channel_bytes_passed_to_lower_layer = 0;
|
||||
|
||||
/*
|
||||
* Current number of bytes in all channel queues; should be
|
||||
* n_channel_bytes_queued - n_channel_bytes_passed_to_lower_layer.
|
||||
*/
|
||||
|
||||
static uint64_t n_channel_bytes_in_queues = 0;
|
||||
|
||||
/*
|
||||
* Current total estimated queue size *including lower layer queues and
|
||||
* transmit overhead*
|
||||
*/
|
||||
|
||||
STATIC uint64_t estimated_total_queue_size = 0;
|
||||
|
||||
/* Digest->channel map
|
||||
*
|
||||
* Similar to the one used in connection_or.c, this maps from the identity
|
||||
@ -123,6 +158,8 @@ cell_queue_entry_new_var(var_cell_t *var_cell);
|
||||
static int is_destroy_cell(channel_t *chan,
|
||||
const cell_queue_entry_t *q, circid_t *circid_out);
|
||||
|
||||
static void channel_assert_counter_consistency(void);
|
||||
|
||||
/* Functions to maintain the digest map */
|
||||
static void channel_add_to_digest_map(channel_t *chan);
|
||||
static void channel_remove_from_digest_map(channel_t *chan);
|
||||
@ -140,6 +177,8 @@ channel_free_list(smartlist_t *channels, int mark_for_close);
|
||||
static void
|
||||
channel_listener_free_list(smartlist_t *channels, int mark_for_close);
|
||||
static void channel_listener_force_free(channel_listener_t *chan_l);
|
||||
static size_t channel_get_cell_queue_entry_size(channel_t *chan,
|
||||
cell_queue_entry_t *q);
|
||||
static void
|
||||
channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q);
|
||||
|
||||
@ -746,6 +785,9 @@ channel_init(channel_t *chan)
|
||||
|
||||
/* It hasn't been open yet. */
|
||||
chan->has_been_open = 0;
|
||||
|
||||
/* Scheduler state is idle */
|
||||
chan->scheduler_state = SCHED_CHAN_IDLE;
|
||||
}
|
||||
|
||||
/**
|
||||
@ -788,6 +830,9 @@ channel_free(channel_t *chan)
|
||||
"Freeing channel " U64_FORMAT " at %p",
|
||||
U64_PRINTF_ARG(chan->global_identifier), chan);
|
||||
|
||||
/* Get this one out of the scheduler */
|
||||
scheduler_release_channel(chan);
|
||||
|
||||
/*
|
||||
* Get rid of cmux policy before we do anything, so cmux policies don't
|
||||
* see channels in weird half-freed states.
|
||||
@ -863,6 +908,9 @@ channel_force_free(channel_t *chan)
|
||||
"Force-freeing channel " U64_FORMAT " at %p",
|
||||
U64_PRINTF_ARG(chan->global_identifier), chan);
|
||||
|
||||
/* Get this one out of the scheduler */
|
||||
scheduler_release_channel(chan);
|
||||
|
||||
/*
|
||||
* Get rid of cmux policy before we do anything, so cmux policies don't
|
||||
* see channels in weird half-freed states.
|
||||
@ -1665,6 +1713,36 @@ cell_queue_entry_new_var(var_cell_t *var_cell)
|
||||
return q;
|
||||
}
|
||||
|
||||
/**
|
||||
* Ask how big the cell contained in a cell_queue_entry_t is
|
||||
*/
|
||||
|
||||
static size_t
|
||||
channel_get_cell_queue_entry_size(channel_t *chan, cell_queue_entry_t *q)
|
||||
{
|
||||
size_t rv = 0;
|
||||
|
||||
tor_assert(chan);
|
||||
tor_assert(q);
|
||||
|
||||
switch (q->type) {
|
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case CELL_QUEUE_FIXED:
|
||||
rv = get_cell_network_size(chan->wide_circ_ids);
|
||||
break;
|
||||
case CELL_QUEUE_VAR:
|
||||
rv = get_var_cell_header_size(chan->wide_circ_ids) +
|
||||
(q->u.var.var_cell ? q->u.var.var_cell->payload_len : 0);
|
||||
break;
|
||||
case CELL_QUEUE_PACKED:
|
||||
rv = get_cell_network_size(chan->wide_circ_ids);
|
||||
break;
|
||||
default:
|
||||
tor_assert(1);
|
||||
}
|
||||
|
||||
return rv;
|
||||
}
|
||||
|
||||
/**
|
||||
* Write to a channel based on a cell_queue_entry_t
|
||||
*
|
||||
@ -1677,6 +1755,7 @@ channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q)
|
||||
{
|
||||
int result = 0, sent = 0;
|
||||
cell_queue_entry_t *tmp = NULL;
|
||||
size_t cell_bytes;
|
||||
|
||||
tor_assert(chan);
|
||||
tor_assert(q);
|
||||
@ -1693,6 +1772,9 @@ channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q)
|
||||
}
|
||||
}
|
||||
|
||||
/* For statistical purposes, figure out how big this cell is */
|
||||
cell_bytes = channel_get_cell_queue_entry_size(chan, q);
|
||||
|
||||
/* Can we send it right out? If so, try */
|
||||
if (TOR_SIMPLEQ_EMPTY(&chan->outgoing_queue) &&
|
||||
chan->state == CHANNEL_STATE_OPEN) {
|
||||
@ -1726,6 +1808,13 @@ channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q)
|
||||
channel_timestamp_drained(chan);
|
||||
/* Update the counter */
|
||||
++(chan->n_cells_xmitted);
|
||||
chan->n_bytes_xmitted += cell_bytes;
|
||||
/* Update global counters */
|
||||
++n_channel_cells_queued;
|
||||
++n_channel_cells_passed_to_lower_layer;
|
||||
n_channel_bytes_queued += cell_bytes;
|
||||
n_channel_bytes_passed_to_lower_layer += cell_bytes;
|
||||
channel_assert_counter_consistency();
|
||||
}
|
||||
}
|
||||
|
||||
@ -1737,6 +1826,14 @@ channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q)
|
||||
*/
|
||||
tmp = cell_queue_entry_dup(q);
|
||||
TOR_SIMPLEQ_INSERT_TAIL(&chan->outgoing_queue, tmp, next);
|
||||
/* Update global counters */
|
||||
++n_channel_cells_queued;
|
||||
++n_channel_cells_in_queues;
|
||||
n_channel_bytes_queued += cell_bytes;
|
||||
n_channel_bytes_in_queues += cell_bytes;
|
||||
channel_assert_counter_consistency();
|
||||
/* Update channel queue size */
|
||||
chan->bytes_in_queue += cell_bytes;
|
||||
/* Try to process the queue? */
|
||||
if (chan->state == CHANNEL_STATE_OPEN) channel_flush_cells(chan);
|
||||
}
|
||||
@ -1775,6 +1872,9 @@ channel_write_cell(channel_t *chan, cell_t *cell)
|
||||
q.type = CELL_QUEUE_FIXED;
|
||||
q.u.fixed.cell = cell;
|
||||
channel_write_cell_queue_entry(chan, &q);
|
||||
|
||||
/* Update the queue size estimate */
|
||||
channel_update_xmit_queue_size(chan);
|
||||
}
|
||||
|
||||
/**
|
||||
@ -1810,6 +1910,9 @@ channel_write_packed_cell(channel_t *chan, packed_cell_t *packed_cell)
|
||||
q.type = CELL_QUEUE_PACKED;
|
||||
q.u.packed.packed_cell = packed_cell;
|
||||
channel_write_cell_queue_entry(chan, &q);
|
||||
|
||||
/* Update the queue size estimate */
|
||||
channel_update_xmit_queue_size(chan);
|
||||
}
|
||||
|
||||
/**
|
||||
@ -1846,6 +1949,9 @@ channel_write_var_cell(channel_t *chan, var_cell_t *var_cell)
|
||||
q.type = CELL_QUEUE_VAR;
|
||||
q.u.var.var_cell = var_cell;
|
||||
channel_write_cell_queue_entry(chan, &q);
|
||||
|
||||
/* Update the queue size estimate */
|
||||
channel_update_xmit_queue_size(chan);
|
||||
}
|
||||
|
||||
/**
|
||||
@ -1941,6 +2047,41 @@ channel_change_state(channel_t *chan, channel_state_t to_state)
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* If we're going to a closed/closing state, we don't need scheduling any
|
||||
* more; in CHANNEL_STATE_MAINT we can't accept writes.
|
||||
*/
|
||||
if (to_state == CHANNEL_STATE_CLOSING ||
|
||||
to_state == CHANNEL_STATE_CLOSED ||
|
||||
to_state == CHANNEL_STATE_ERROR) {
|
||||
scheduler_release_channel(chan);
|
||||
} else if (to_state == CHANNEL_STATE_MAINT) {
|
||||
scheduler_channel_doesnt_want_writes(chan);
|
||||
}
|
||||
|
||||
/*
|
||||
* If we're closing, this channel no longer counts toward the global
|
||||
* estimated queue size; if we're open, it now does.
|
||||
*/
|
||||
if ((to_state == CHANNEL_STATE_CLOSING ||
|
||||
to_state == CHANNEL_STATE_CLOSED ||
|
||||
to_state == CHANNEL_STATE_ERROR) &&
|
||||
(from_state == CHANNEL_STATE_OPEN ||
|
||||
from_state == CHANNEL_STATE_MAINT)) {
|
||||
estimated_total_queue_size -= chan->bytes_in_queue;
|
||||
}
|
||||
|
||||
/*
|
||||
* If we're opening, this channel now does count toward the global
|
||||
* estimated queue size.
|
||||
*/
|
||||
if ((to_state == CHANNEL_STATE_OPEN ||
|
||||
to_state == CHANNEL_STATE_MAINT) &&
|
||||
!(from_state == CHANNEL_STATE_OPEN ||
|
||||
from_state == CHANNEL_STATE_MAINT)) {
|
||||
estimated_total_queue_size += chan->bytes_in_queue;
|
||||
}
|
||||
|
||||
/* Tell circuits if we opened and stuff */
|
||||
if (to_state == CHANNEL_STATE_OPEN) {
|
||||
channel_do_open_actions(chan);
|
||||
@ -2056,12 +2197,13 @@ channel_listener_change_state(channel_listener_t *chan_l,
|
||||
|
||||
#define MAX_CELLS_TO_GET_FROM_CIRCUITS_FOR_UNLIMITED 256
|
||||
|
||||
ssize_t
|
||||
channel_flush_some_cells(channel_t *chan, ssize_t num_cells)
|
||||
MOCK_IMPL(ssize_t,
|
||||
channel_flush_some_cells, (channel_t *chan, ssize_t num_cells))
|
||||
{
|
||||
unsigned int unlimited = 0;
|
||||
ssize_t flushed = 0;
|
||||
int num_cells_from_circs, clamped_num_cells;
|
||||
int q_len_before, q_len_after;
|
||||
|
||||
tor_assert(chan);
|
||||
|
||||
@ -2087,17 +2229,48 @@ channel_flush_some_cells(channel_t *chan, ssize_t num_cells)
|
||||
clamped_num_cells = (int)(num_cells - flushed);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Keep track of the change in queue size; we have to count cells
|
||||
* channel_flush_from_first_active_circuit() writes out directly,
|
||||
* but not double-count ones we might get later in
|
||||
* channel_flush_some_cells_from_outgoing_queue()
|
||||
*/
|
||||
q_len_before = chan_cell_queue_len(&(chan->outgoing_queue));
|
||||
|
||||
/* Try to get more cells from any active circuits */
|
||||
num_cells_from_circs = channel_flush_from_first_active_circuit(
|
||||
chan, clamped_num_cells);
|
||||
|
||||
/* If it claims we got some, process the queue again */
|
||||
q_len_after = chan_cell_queue_len(&(chan->outgoing_queue));
|
||||
|
||||
/*
|
||||
* If it claims we got some, adjust the flushed counter and consider
|
||||
* processing the queue again
|
||||
*/
|
||||
if (num_cells_from_circs > 0) {
|
||||
/*
|
||||
* Adjust flushed by the number of cells counted in
|
||||
* num_cells_from_circs that didn't go to the cell queue.
|
||||
*/
|
||||
|
||||
if (q_len_after > q_len_before) {
|
||||
num_cells_from_circs -= (q_len_after - q_len_before);
|
||||
if (num_cells_from_circs < 0) num_cells_from_circs = 0;
|
||||
}
|
||||
|
||||
flushed += num_cells_from_circs;
|
||||
|
||||
/* Now process the queue if necessary */
|
||||
|
||||
if ((q_len_after > q_len_before) &&
|
||||
(unlimited || (flushed < num_cells))) {
|
||||
flushed += channel_flush_some_cells_from_outgoing_queue(chan,
|
||||
(unlimited ? -1 : num_cells - flushed));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
done:
|
||||
return flushed;
|
||||
@ -2117,6 +2290,8 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan,
|
||||
unsigned int unlimited = 0;
|
||||
ssize_t flushed = 0;
|
||||
cell_queue_entry_t *q = NULL;
|
||||
size_t cell_size;
|
||||
int free_q = 0, handed_off = 0;
|
||||
|
||||
tor_assert(chan);
|
||||
tor_assert(chan->write_cell);
|
||||
@ -2130,8 +2305,12 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan,
|
||||
if (chan->state == CHANNEL_STATE_OPEN) {
|
||||
while ((unlimited || num_cells > flushed) &&
|
||||
NULL != (q = TOR_SIMPLEQ_FIRST(&chan->outgoing_queue))) {
|
||||
free_q = 0;
|
||||
handed_off = 0;
|
||||
|
||||
if (1) {
|
||||
/* Figure out how big it is for statistical purposes */
|
||||
cell_size = channel_get_cell_queue_entry_size(chan, q);
|
||||
/*
|
||||
* Okay, we have a good queue entry, try to give it to the lower
|
||||
* layer.
|
||||
@ -2144,8 +2323,9 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan,
|
||||
++flushed;
|
||||
channel_timestamp_xmit(chan);
|
||||
++(chan->n_cells_xmitted);
|
||||
cell_queue_entry_free(q, 1);
|
||||
q = NULL;
|
||||
chan->n_bytes_xmitted += cell_size;
|
||||
free_q = 1;
|
||||
handed_off = 1;
|
||||
}
|
||||
/* Else couldn't write it; leave it on the queue */
|
||||
} else {
|
||||
@ -2156,8 +2336,8 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan,
|
||||
"(global ID " U64_FORMAT ").",
|
||||
chan, U64_PRINTF_ARG(chan->global_identifier));
|
||||
/* Throw it away */
|
||||
cell_queue_entry_free(q, 0);
|
||||
q = NULL;
|
||||
free_q = 1;
|
||||
handed_off = 0;
|
||||
}
|
||||
break;
|
||||
case CELL_QUEUE_PACKED:
|
||||
@ -2167,8 +2347,9 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan,
|
||||
++flushed;
|
||||
channel_timestamp_xmit(chan);
|
||||
++(chan->n_cells_xmitted);
|
||||
cell_queue_entry_free(q, 1);
|
||||
q = NULL;
|
||||
chan->n_bytes_xmitted += cell_size;
|
||||
free_q = 1;
|
||||
handed_off = 1;
|
||||
}
|
||||
/* Else couldn't write it; leave it on the queue */
|
||||
} else {
|
||||
@ -2179,8 +2360,8 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan,
|
||||
"(global ID " U64_FORMAT ").",
|
||||
chan, U64_PRINTF_ARG(chan->global_identifier));
|
||||
/* Throw it away */
|
||||
cell_queue_entry_free(q, 0);
|
||||
q = NULL;
|
||||
free_q = 1;
|
||||
handed_off = 0;
|
||||
}
|
||||
break;
|
||||
case CELL_QUEUE_VAR:
|
||||
@ -2190,8 +2371,9 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan,
|
||||
++flushed;
|
||||
channel_timestamp_xmit(chan);
|
||||
++(chan->n_cells_xmitted);
|
||||
cell_queue_entry_free(q, 1);
|
||||
q = NULL;
|
||||
chan->n_bytes_xmitted += cell_size;
|
||||
free_q = 1;
|
||||
handed_off = 1;
|
||||
}
|
||||
/* Else couldn't write it; leave it on the queue */
|
||||
} else {
|
||||
@ -2202,8 +2384,8 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan,
|
||||
"(global ID " U64_FORMAT ").",
|
||||
chan, U64_PRINTF_ARG(chan->global_identifier));
|
||||
/* Throw it away */
|
||||
cell_queue_entry_free(q, 0);
|
||||
q = NULL;
|
||||
free_q = 1;
|
||||
handed_off = 0;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
@ -2213,12 +2395,32 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan,
|
||||
"(global ID " U64_FORMAT "; ignoring it."
|
||||
" Someone should fix this.",
|
||||
q->type, chan, U64_PRINTF_ARG(chan->global_identifier));
|
||||
cell_queue_entry_free(q, 0);
|
||||
q = NULL;
|
||||
free_q = 1;
|
||||
handed_off = 0;
|
||||
}
|
||||
|
||||
/* if q got NULLed out, we used it and should remove the queue entry */
|
||||
if (!q) TOR_SIMPLEQ_REMOVE_HEAD(&chan->outgoing_queue, next);
|
||||
/*
|
||||
* if free_q is set, we used it and should remove the queue entry;
|
||||
* we have to do the free down here so TOR_SIMPLEQ_REMOVE_HEAD isn't
|
||||
* accessing freed memory
|
||||
*/
|
||||
if (free_q) {
|
||||
TOR_SIMPLEQ_REMOVE_HEAD(&chan->outgoing_queue, next);
|
||||
/*
|
||||
* ...and we handed a cell off to the lower layer, so we should
|
||||
* update the counters.
|
||||
*/
|
||||
++n_channel_cells_passed_to_lower_layer;
|
||||
--n_channel_cells_in_queues;
|
||||
n_channel_bytes_passed_to_lower_layer += cell_size;
|
||||
n_channel_bytes_in_queues -= cell_size;
|
||||
channel_assert_counter_consistency();
|
||||
/* Update the channel's queue size too */
|
||||
chan->bytes_in_queue -= cell_size;
|
||||
/* Finally, free q */
|
||||
cell_queue_entry_free(q, handed_off);
|
||||
q = NULL;
|
||||
}
|
||||
/* No cell removed from list, so we can't go on any further */
|
||||
else break;
|
||||
}
|
||||
@ -2230,6 +2432,9 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan,
|
||||
channel_timestamp_drained(chan);
|
||||
}
|
||||
|
||||
/* Update the estimate queue size */
|
||||
channel_update_xmit_queue_size(chan);
|
||||
|
||||
return flushed;
|
||||
}
|
||||
|
||||
@ -2541,8 +2746,9 @@ channel_queue_cell(channel_t *chan, cell_t *cell)
|
||||
/* Timestamp for receiving */
|
||||
channel_timestamp_recv(chan);
|
||||
|
||||
/* Update the counter */
|
||||
/* Update the counters */
|
||||
++(chan->n_cells_recved);
|
||||
chan->n_bytes_recved += get_cell_network_size(chan->wide_circ_ids);
|
||||
|
||||
/* If we don't need to queue we can just call cell_handler */
|
||||
if (!need_to_queue) {
|
||||
@ -2596,6 +2802,8 @@ channel_queue_var_cell(channel_t *chan, var_cell_t *var_cell)
|
||||
|
||||
/* Update the counter */
|
||||
++(chan->n_cells_recved);
|
||||
chan->n_bytes_recved += get_var_cell_header_size(chan->wide_circ_ids) +
|
||||
var_cell->payload_len;
|
||||
|
||||
/* If we don't need to queue we can just call cell_handler */
|
||||
if (!need_to_queue) {
|
||||
@ -2645,6 +2853,19 @@ packed_cell_is_destroy(channel_t *chan,
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Assert that the global channel stats counters are internally consistent
|
||||
*/
|
||||
|
||||
static void
|
||||
channel_assert_counter_consistency(void)
|
||||
{
|
||||
tor_assert(n_channel_cells_queued ==
|
||||
(n_channel_cells_in_queues + n_channel_cells_passed_to_lower_layer));
|
||||
tor_assert(n_channel_bytes_queued ==
|
||||
(n_channel_bytes_in_queues + n_channel_bytes_passed_to_lower_layer));
|
||||
}
|
||||
|
||||
/** DOCDOC */
|
||||
static int
|
||||
is_destroy_cell(channel_t *chan,
|
||||
@ -2726,6 +2947,19 @@ void
|
||||
channel_dumpstats(int severity)
|
||||
{
|
||||
if (all_channels && smartlist_len(all_channels) > 0) {
|
||||
tor_log(severity, LD_GENERAL,
|
||||
"Channels have queued " U64_FORMAT " bytes in " U64_FORMAT " cells, "
|
||||
"and handed " U64_FORMAT " bytes in " U64_FORMAT " cells to the lower"
|
||||
" layer.",
|
||||
U64_PRINTF_ARG(n_channel_bytes_queued),
|
||||
U64_PRINTF_ARG(n_channel_cells_queued),
|
||||
U64_PRINTF_ARG(n_channel_bytes_passed_to_lower_layer),
|
||||
U64_PRINTF_ARG(n_channel_cells_passed_to_lower_layer));
|
||||
tor_log(severity, LD_GENERAL,
|
||||
"There are currently " U64_FORMAT " bytes in " U64_FORMAT " cells "
|
||||
"in channel queues.",
|
||||
U64_PRINTF_ARG(n_channel_bytes_in_queues),
|
||||
U64_PRINTF_ARG(n_channel_cells_in_queues));
|
||||
tor_log(severity, LD_GENERAL,
|
||||
"Dumping statistics about %d channels:",
|
||||
smartlist_len(all_channels));
|
||||
@ -3200,7 +3434,7 @@ channel_listener_describe_transport(channel_listener_t *chan_l)
|
||||
/**
|
||||
* Return the number of entries in <b>queue</b>
|
||||
*/
|
||||
static int
|
||||
STATIC int
|
||||
chan_cell_queue_len(const chan_cell_queue_t *queue)
|
||||
{
|
||||
int r = 0;
|
||||
@ -3216,8 +3450,8 @@ chan_cell_queue_len(const chan_cell_queue_t *queue)
|
||||
* Dump statistics for one channel to the log
|
||||
*/
|
||||
|
||||
void
|
||||
channel_dump_statistics(channel_t *chan, int severity)
|
||||
MOCK_IMPL(void,
|
||||
channel_dump_statistics, (channel_t *chan, int severity))
|
||||
{
|
||||
double avg, interval, age;
|
||||
time_t now = time(NULL);
|
||||
@ -3369,12 +3603,22 @@ channel_dump_statistics(channel_t *chan, int severity)
|
||||
/* Describe counters and rates */
|
||||
tor_log(severity, LD_GENERAL,
|
||||
" * Channel " U64_FORMAT " has received "
|
||||
U64_FORMAT " cells and transmitted " U64_FORMAT,
|
||||
U64_FORMAT " bytes in " U64_FORMAT " cells and transmitted "
|
||||
U64_FORMAT " bytes in " U64_FORMAT " cells",
|
||||
U64_PRINTF_ARG(chan->global_identifier),
|
||||
U64_PRINTF_ARG(chan->n_bytes_recved),
|
||||
U64_PRINTF_ARG(chan->n_cells_recved),
|
||||
U64_PRINTF_ARG(chan->n_bytes_xmitted),
|
||||
U64_PRINTF_ARG(chan->n_cells_xmitted));
|
||||
if (now > chan->timestamp_created &&
|
||||
chan->timestamp_created > 0) {
|
||||
if (chan->n_bytes_recved > 0) {
|
||||
avg = (double)(chan->n_bytes_recved) / age;
|
||||
tor_log(severity, LD_GENERAL,
|
||||
" * Channel " U64_FORMAT " has averaged %f "
|
||||
"bytes received per second",
|
||||
U64_PRINTF_ARG(chan->global_identifier), avg);
|
||||
}
|
||||
if (chan->n_cells_recved > 0) {
|
||||
avg = (double)(chan->n_cells_recved) / age;
|
||||
if (avg >= 1.0) {
|
||||
@ -3390,6 +3634,13 @@ channel_dump_statistics(channel_t *chan, int severity)
|
||||
U64_PRINTF_ARG(chan->global_identifier), interval);
|
||||
}
|
||||
}
|
||||
if (chan->n_bytes_xmitted > 0) {
|
||||
avg = (double)(chan->n_bytes_xmitted) / age;
|
||||
tor_log(severity, LD_GENERAL,
|
||||
" * Channel " U64_FORMAT " has averaged %f "
|
||||
"bytes transmitted per second",
|
||||
U64_PRINTF_ARG(chan->global_identifier), avg);
|
||||
}
|
||||
if (chan->n_cells_xmitted > 0) {
|
||||
avg = (double)(chan->n_cells_xmitted) / age;
|
||||
if (avg >= 1.0) {
|
||||
@ -3807,6 +4058,50 @@ channel_mark_outgoing(channel_t *chan)
|
||||
chan->is_incoming = 0;
|
||||
}
|
||||
|
||||
/************************
|
||||
* Flow control queries *
|
||||
***********************/
|
||||
|
||||
/*
|
||||
* Get the latest estimate for the total queue size of all open channels
|
||||
*/
|
||||
|
||||
uint64_t
|
||||
channel_get_global_queue_estimate(void)
|
||||
{
|
||||
return estimated_total_queue_size;
|
||||
}
|
||||
|
||||
/*
|
||||
* Estimate the number of writeable cells
|
||||
*
|
||||
* Ask the lower layer for an estimate of how many cells it can accept, and
|
||||
* then subtract the length of our outgoing_queue, if any, to produce an
|
||||
* estimate of the number of cells this channel can accept for writes.
|
||||
*/
|
||||
|
||||
int
|
||||
channel_num_cells_writeable(channel_t *chan)
|
||||
{
|
||||
int result;
|
||||
|
||||
tor_assert(chan);
|
||||
tor_assert(chan->num_cells_writeable);
|
||||
|
||||
if (chan->state == CHANNEL_STATE_OPEN) {
|
||||
/* Query lower layer */
|
||||
result = chan->num_cells_writeable(chan);
|
||||
/* Subtract cell queue length, if any */
|
||||
result -= chan_cell_queue_len(&chan->outgoing_queue);
|
||||
if (result < 0) result = 0;
|
||||
} else {
|
||||
/* No cells are writeable in any other state */
|
||||
result = 0;
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
/*********************
|
||||
* Timestamp updates *
|
||||
********************/
|
||||
@ -4209,3 +4504,87 @@ channel_set_circid_type(channel_t *chan,
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Update the estimated number of bytes queued to transmit for this channel,
|
||||
* and notify the scheduler. The estimate includes both the channel queue and
|
||||
* the queue size reported by the lower layer, and an overhead estimate
|
||||
* optionally provided by the lower layer.
|
||||
*/
|
||||
|
||||
void
|
||||
channel_update_xmit_queue_size(channel_t *chan)
|
||||
{
|
||||
uint64_t queued, adj;
|
||||
double overhead;
|
||||
|
||||
tor_assert(chan);
|
||||
tor_assert(chan->num_bytes_queued);
|
||||
|
||||
/*
|
||||
* First, get the number of bytes we have queued without factoring in
|
||||
* lower-layer overhead.
|
||||
*/
|
||||
queued = chan->num_bytes_queued(chan) + chan->bytes_in_queue;
|
||||
/* Next, adjust by the overhead factor, if any is available */
|
||||
if (chan->get_overhead_estimate) {
|
||||
overhead = chan->get_overhead_estimate(chan);
|
||||
if (overhead >= 1.0f) {
|
||||
queued *= overhead;
|
||||
} else {
|
||||
/* Ignore silly overhead factors */
|
||||
log_notice(LD_CHANNEL, "Ignoring silly overhead factor %f", overhead);
|
||||
}
|
||||
}
|
||||
|
||||
/* Now, compare to the previous estimate */
|
||||
if (queued > chan->bytes_queued_for_xmit) {
|
||||
adj = queued - chan->bytes_queued_for_xmit;
|
||||
log_debug(LD_CHANNEL,
|
||||
"Increasing queue size for channel " U64_FORMAT " by " U64_FORMAT
|
||||
" from " U64_FORMAT " to " U64_FORMAT,
|
||||
U64_PRINTF_ARG(chan->global_identifier),
|
||||
U64_PRINTF_ARG(adj),
|
||||
U64_PRINTF_ARG(chan->bytes_queued_for_xmit),
|
||||
U64_PRINTF_ARG(queued));
|
||||
/* Update the channel's estimate */
|
||||
chan->bytes_queued_for_xmit = queued;
|
||||
|
||||
/* Update the global queue size estimate if appropriate */
|
||||
if (chan->state == CHANNEL_STATE_OPEN ||
|
||||
chan->state == CHANNEL_STATE_MAINT) {
|
||||
estimated_total_queue_size += adj;
|
||||
log_debug(LD_CHANNEL,
|
||||
"Increasing global queue size by " U64_FORMAT " for channel "
|
||||
U64_FORMAT ", new size is " U64_FORMAT,
|
||||
U64_PRINTF_ARG(adj), U64_PRINTF_ARG(chan->global_identifier),
|
||||
U64_PRINTF_ARG(estimated_total_queue_size));
|
||||
/* Tell the scheduler we're increasing the queue size */
|
||||
scheduler_adjust_queue_size(chan, 1, adj);
|
||||
}
|
||||
} else if (queued < chan->bytes_queued_for_xmit) {
|
||||
adj = chan->bytes_queued_for_xmit - queued;
|
||||
log_debug(LD_CHANNEL,
|
||||
"Decreasing queue size for channel " U64_FORMAT " by " U64_FORMAT
|
||||
" from " U64_FORMAT " to " U64_FORMAT,
|
||||
U64_PRINTF_ARG(chan->global_identifier),
|
||||
U64_PRINTF_ARG(adj),
|
||||
U64_PRINTF_ARG(chan->bytes_queued_for_xmit),
|
||||
U64_PRINTF_ARG(queued));
|
||||
/* Update the channel's estimate */
|
||||
chan->bytes_queued_for_xmit = queued;
|
||||
|
||||
/* Update the global queue size estimate if appropriate */
|
||||
if (chan->state == CHANNEL_STATE_OPEN ||
|
||||
chan->state == CHANNEL_STATE_MAINT) {
|
||||
estimated_total_queue_size -= adj;
|
||||
log_debug(LD_CHANNEL,
|
||||
"Decreasing global queue size by " U64_FORMAT " for channel "
|
||||
U64_FORMAT ", new size is " U64_FORMAT,
|
||||
U64_PRINTF_ARG(adj), U64_PRINTF_ARG(chan->global_identifier),
|
||||
U64_PRINTF_ARG(estimated_total_queue_size));
|
||||
/* Tell the scheduler we're decreasing the queue size */
|
||||
scheduler_adjust_queue_size(chan, -1, adj);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -57,6 +57,32 @@ struct channel_s {
|
||||
CHANNEL_CLOSE_FOR_ERROR
|
||||
} reason_for_closing;
|
||||
|
||||
/** State variable for use by the scheduler */
|
||||
enum {
|
||||
/*
|
||||
* The channel is not open, or it has a full output buffer but no queued
|
||||
* cells.
|
||||
*/
|
||||
SCHED_CHAN_IDLE = 0,
|
||||
/*
|
||||
* The channel has space on its output buffer to write, but no queued
|
||||
* cells.
|
||||
*/
|
||||
SCHED_CHAN_WAITING_FOR_CELLS,
|
||||
/*
|
||||
* The scheduler has queued cells but no output buffer space to write.
|
||||
*/
|
||||
SCHED_CHAN_WAITING_TO_WRITE,
|
||||
/*
|
||||
* The scheduler has both queued cells and output buffer space, and is
|
||||
* eligible for the scheduler loop.
|
||||
*/
|
||||
SCHED_CHAN_PENDING
|
||||
} scheduler_state;
|
||||
|
||||
/** Heap index for use by the scheduler */
|
||||
int sched_heap_idx;
|
||||
|
||||
/** Timestamps for both cell channels and listeners */
|
||||
time_t timestamp_created; /* Channel created */
|
||||
time_t timestamp_active; /* Any activity */
|
||||
@ -79,6 +105,11 @@ struct channel_s {
|
||||
/* Methods implemented by the lower layer */
|
||||
|
||||
/**
|
||||
* Ask the lower layer for an estimate of the average overhead for
|
||||
* transmissions on this channel.
|
||||
*/
|
||||
double (*get_overhead_estimate)(channel_t *);
|
||||
/*
|
||||
* Ask the underlying transport what the remote endpoint address is, in
|
||||
* a tor_addr_t. This is optional and subclasses may leave this NULL.
|
||||
* If they implement it, they should write the address out to the
|
||||
@ -110,7 +141,11 @@ struct channel_s {
|
||||
int (*matches_extend_info)(channel_t *, extend_info_t *);
|
||||
/** Check if this channel matches a target address when extending */
|
||||
int (*matches_target)(channel_t *, const tor_addr_t *);
|
||||
/** Write a cell to an open channel */
|
||||
/* Ask the lower layer how many bytes it has queued but not yet sent */
|
||||
size_t (*num_bytes_queued)(channel_t *);
|
||||
/* Ask the lower layer how many cells can be written */
|
||||
int (*num_cells_writeable)(channel_t *);
|
||||
/* Write a cell to an open channel */
|
||||
int (*write_cell)(channel_t *, cell_t *);
|
||||
/** Write a packed cell to an open channel */
|
||||
int (*write_packed_cell)(channel_t *, packed_cell_t *);
|
||||
@ -198,8 +233,16 @@ struct channel_s {
|
||||
uint64_t dirreq_id;
|
||||
|
||||
/** Channel counters for cell channels */
|
||||
uint64_t n_cells_recved;
|
||||
uint64_t n_cells_xmitted;
|
||||
uint64_t n_cells_recved, n_bytes_recved;
|
||||
uint64_t n_cells_xmitted, n_bytes_xmitted;
|
||||
|
||||
/** Our current contribution to the scheduler's total xmit queue */
|
||||
uint64_t bytes_queued_for_xmit;
|
||||
|
||||
/** Number of bytes in this channel's cell queue; does not include
|
||||
* lower-layer queueing.
|
||||
*/
|
||||
uint64_t bytes_in_queue;
|
||||
};
|
||||
|
||||
struct channel_listener_s {
|
||||
@ -311,6 +354,34 @@ void channel_set_cmux_policy_everywhere(circuitmux_policy_t *pol);
|
||||
|
||||
#ifdef TOR_CHANNEL_INTERNAL_
|
||||
|
||||
#ifdef CHANNEL_PRIVATE_
|
||||
/* Cell queue structure (here rather than channel.c for test suite use) */
|
||||
|
||||
typedef struct cell_queue_entry_s cell_queue_entry_t;
|
||||
struct cell_queue_entry_s {
|
||||
TOR_SIMPLEQ_ENTRY(cell_queue_entry_s) next;
|
||||
enum {
|
||||
CELL_QUEUE_FIXED,
|
||||
CELL_QUEUE_VAR,
|
||||
CELL_QUEUE_PACKED
|
||||
} type;
|
||||
union {
|
||||
struct {
|
||||
cell_t *cell;
|
||||
} fixed;
|
||||
struct {
|
||||
var_cell_t *var_cell;
|
||||
} var;
|
||||
struct {
|
||||
packed_cell_t *packed_cell;
|
||||
} packed;
|
||||
} u;
|
||||
};
|
||||
|
||||
/* Cell queue functions for benefit of test suite */
|
||||
STATIC int chan_cell_queue_len(const chan_cell_queue_t *queue);
|
||||
#endif
|
||||
|
||||
/* Channel operations for subclasses and internal use only */
|
||||
|
||||
/* Initialize a newly allocated channel - do this first in subclass
|
||||
@ -384,7 +455,8 @@ void channel_queue_var_cell(channel_t *chan, var_cell_t *var_cell);
|
||||
void channel_flush_cells(channel_t *chan);
|
||||
|
||||
/* Request from lower layer for more cells if available */
|
||||
ssize_t channel_flush_some_cells(channel_t *chan, ssize_t num_cells);
|
||||
MOCK_DECL(ssize_t, channel_flush_some_cells,
|
||||
(channel_t *chan, ssize_t num_cells));
|
||||
|
||||
/* Query if data available on this channel */
|
||||
int channel_more_to_flush(channel_t *chan);
|
||||
@ -435,7 +507,7 @@ channel_t * channel_next_with_digest(channel_t *chan);
|
||||
*/
|
||||
|
||||
const char * channel_describe_transport(channel_t *chan);
|
||||
void channel_dump_statistics(channel_t *chan, int severity);
|
||||
MOCK_DECL(void, channel_dump_statistics, (channel_t *chan, int severity));
|
||||
void channel_dump_transport_statistics(channel_t *chan, int severity);
|
||||
const char * channel_get_actual_remote_descr(channel_t *chan);
|
||||
const char * channel_get_actual_remote_address(channel_t *chan);
|
||||
@ -458,6 +530,7 @@ unsigned int channel_num_circuits(channel_t *chan);
|
||||
void channel_set_circid_type(channel_t *chan, crypto_pk_t *identity_rcvd,
|
||||
int consider_identity);
|
||||
void channel_timestamp_client(channel_t *chan);
|
||||
void channel_update_xmit_queue_size(channel_t *chan);
|
||||
|
||||
const char * channel_listener_describe_transport(channel_listener_t *chan_l);
|
||||
void channel_listener_dump_statistics(channel_listener_t *chan_l,
|
||||
@ -465,6 +538,10 @@ void channel_listener_dump_statistics(channel_listener_t *chan_l,
|
||||
void channel_listener_dump_transport_statistics(channel_listener_t *chan_l,
|
||||
int severity);
|
||||
|
||||
/* Flow control queries */
|
||||
uint64_t channel_get_global_queue_estimate(void);
|
||||
int channel_num_cells_writeable(channel_t *chan);
|
||||
|
||||
/* Timestamp queries */
|
||||
time_t channel_when_created(channel_t *chan);
|
||||
time_t channel_when_last_active(channel_t *chan);
|
||||
|
||||
@ -25,6 +25,7 @@
|
||||
#include "relay.h"
|
||||
#include "router.h"
|
||||
#include "routerlist.h"
|
||||
#include "scheduler.h"
|
||||
|
||||
/** How many CELL_PADDING cells have we received, ever? */
|
||||
uint64_t stats_n_padding_cells_processed = 0;
|
||||
@ -54,6 +55,7 @@ static void channel_tls_common_init(channel_tls_t *tlschan);
|
||||
static void channel_tls_close_method(channel_t *chan);
|
||||
static const char * channel_tls_describe_transport_method(channel_t *chan);
|
||||
static void channel_tls_free_method(channel_t *chan);
|
||||
static double channel_tls_get_overhead_estimate_method(channel_t *chan);
|
||||
static int
|
||||
channel_tls_get_remote_addr_method(channel_t *chan, tor_addr_t *addr_out);
|
||||
static int
|
||||
@ -67,6 +69,8 @@ channel_tls_matches_extend_info_method(channel_t *chan,
|
||||
extend_info_t *extend_info);
|
||||
static int channel_tls_matches_target_method(channel_t *chan,
|
||||
const tor_addr_t *target);
|
||||
static int channel_tls_num_cells_writeable_method(channel_t *chan);
|
||||
static size_t channel_tls_num_bytes_queued_method(channel_t *chan);
|
||||
static int channel_tls_write_cell_method(channel_t *chan,
|
||||
cell_t *cell);
|
||||
static int channel_tls_write_packed_cell_method(channel_t *chan,
|
||||
@ -116,6 +120,7 @@ channel_tls_common_init(channel_tls_t *tlschan)
|
||||
chan->close = channel_tls_close_method;
|
||||
chan->describe_transport = channel_tls_describe_transport_method;
|
||||
chan->free = channel_tls_free_method;
|
||||
chan->get_overhead_estimate = channel_tls_get_overhead_estimate_method;
|
||||
chan->get_remote_addr = channel_tls_get_remote_addr_method;
|
||||
chan->get_remote_descr = channel_tls_get_remote_descr_method;
|
||||
chan->get_transport_name = channel_tls_get_transport_name_method;
|
||||
@ -123,6 +128,8 @@ channel_tls_common_init(channel_tls_t *tlschan)
|
||||
chan->is_canonical = channel_tls_is_canonical_method;
|
||||
chan->matches_extend_info = channel_tls_matches_extend_info_method;
|
||||
chan->matches_target = channel_tls_matches_target_method;
|
||||
chan->num_bytes_queued = channel_tls_num_bytes_queued_method;
|
||||
chan->num_cells_writeable = channel_tls_num_cells_writeable_method;
|
||||
chan->write_cell = channel_tls_write_cell_method;
|
||||
chan->write_packed_cell = channel_tls_write_packed_cell_method;
|
||||
chan->write_var_cell = channel_tls_write_var_cell_method;
|
||||
@ -434,6 +441,40 @@ channel_tls_free_method(channel_t *chan)
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Get an estimate of the average TLS overhead for the upper layer
|
||||
*/
|
||||
|
||||
static double
|
||||
channel_tls_get_overhead_estimate_method(channel_t *chan)
|
||||
{
|
||||
double overhead = 1.0f;
|
||||
channel_tls_t *tlschan = BASE_CHAN_TO_TLS(chan);
|
||||
|
||||
tor_assert(tlschan);
|
||||
tor_assert(tlschan->conn);
|
||||
|
||||
/* Just return 1.0f if we don't have sensible data */
|
||||
if (tlschan->conn->bytes_xmitted > 0 &&
|
||||
tlschan->conn->bytes_xmitted_by_tls >=
|
||||
tlschan->conn->bytes_xmitted) {
|
||||
overhead = ((double)(tlschan->conn->bytes_xmitted_by_tls)) /
|
||||
((double)(tlschan->conn->bytes_xmitted));
|
||||
|
||||
/*
|
||||
* Never estimate more than 2.0; otherwise we get silly large estimates
|
||||
* at the very start of a new TLS connection.
|
||||
*/
|
||||
if (overhead > 2.0f) overhead = 2.0f;
|
||||
}
|
||||
|
||||
log_debug(LD_CHANNEL,
|
||||
"Estimated overhead ratio for TLS chan " U64_FORMAT " is %f",
|
||||
U64_PRINTF_ARG(chan->global_identifier), overhead);
|
||||
|
||||
return overhead;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the remote address of a channel_tls_t
|
||||
*
|
||||
@ -672,6 +713,50 @@ channel_tls_matches_target_method(channel_t *chan,
|
||||
return tor_addr_eq(&(tlschan->conn->real_addr), target);
|
||||
}
|
||||
|
||||
/**
|
||||
* Tell the upper layer how many bytes we have queued and not yet
|
||||
* sent.
|
||||
*/
|
||||
|
||||
static size_t
|
||||
channel_tls_num_bytes_queued_method(channel_t *chan)
|
||||
{
|
||||
channel_tls_t *tlschan = BASE_CHAN_TO_TLS(chan);
|
||||
|
||||
tor_assert(tlschan);
|
||||
tor_assert(tlschan->conn);
|
||||
|
||||
return connection_get_outbuf_len(TO_CONN(tlschan->conn));
|
||||
}
|
||||
|
||||
/**
|
||||
* Tell the upper layer how many cells we can accept to write
|
||||
*
|
||||
* This implements the num_cells_writeable method for channel_tls_t; it
|
||||
* returns an estimate of the number of cells we can accept with
|
||||
* channel_tls_write_*_cell().
|
||||
*/
|
||||
|
||||
static int
|
||||
channel_tls_num_cells_writeable_method(channel_t *chan)
|
||||
{
|
||||
size_t outbuf_len;
|
||||
int n;
|
||||
channel_tls_t *tlschan = BASE_CHAN_TO_TLS(chan);
|
||||
size_t cell_network_size;
|
||||
|
||||
tor_assert(tlschan);
|
||||
tor_assert(tlschan->conn);
|
||||
|
||||
cell_network_size = get_cell_network_size(tlschan->conn->wide_circ_ids);
|
||||
outbuf_len = connection_get_outbuf_len(TO_CONN(tlschan->conn));
|
||||
/* Get the number of cells */
|
||||
n = CEIL_DIV(OR_CONN_HIGHWATER - outbuf_len, cell_network_size);
|
||||
if (n < 0) n = 0;
|
||||
|
||||
return n;
|
||||
}
|
||||
|
||||
/**
|
||||
* Write a cell to a channel_tls_t
|
||||
*
|
||||
@ -867,6 +952,10 @@ channel_tls_handle_state_change_on_orconn(channel_tls_t *chan,
|
||||
* CHANNEL_STATE_MAINT on this.
|
||||
*/
|
||||
channel_change_state(base_chan, CHANNEL_STATE_OPEN);
|
||||
/* We might have just become writeable; check and tell the scheduler */
|
||||
if (connection_or_num_cells_writeable(conn) > 0) {
|
||||
scheduler_channel_wants_writes(base_chan);
|
||||
}
|
||||
} else {
|
||||
/*
|
||||
* Not open, so from CHANNEL_STATE_OPEN we go to CHANNEL_STATE_MAINT,
|
||||
@ -878,58 +967,6 @@ channel_tls_handle_state_change_on_orconn(channel_tls_t *chan,
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Flush cells from a channel_tls_t
|
||||
*
|
||||
* Try to flush up to about num_cells cells, and return how many we flushed.
|
||||
*/
|
||||
|
||||
ssize_t
|
||||
channel_tls_flush_some_cells(channel_tls_t *chan, ssize_t num_cells)
|
||||
{
|
||||
ssize_t flushed = 0;
|
||||
|
||||
tor_assert(chan);
|
||||
|
||||
if (flushed >= num_cells) goto done;
|
||||
|
||||
/*
|
||||
* If channel_tls_t ever buffers anything below the channel_t layer, flush
|
||||
* that first here.
|
||||
*/
|
||||
|
||||
flushed += channel_flush_some_cells(TLS_CHAN_TO_BASE(chan),
|
||||
num_cells - flushed);
|
||||
|
||||
/*
|
||||
* If channel_tls_t ever buffers anything below the channel_t layer, check
|
||||
* how much we actually got and push it on down here.
|
||||
*/
|
||||
|
||||
done:
|
||||
return flushed;
|
||||
}
|
||||
|
||||
/**
|
||||
* Check if a channel_tls_t has anything to flush
|
||||
*
|
||||
* Return true if there is any more to flush on this channel (cells in queue
|
||||
* or active circuits).
|
||||
*/
|
||||
|
||||
int
|
||||
channel_tls_more_to_flush(channel_tls_t *chan)
|
||||
{
|
||||
tor_assert(chan);
|
||||
|
||||
/*
|
||||
* If channel_tls_t ever buffers anything below channel_t, the
|
||||
* check for that should go here first.
|
||||
*/
|
||||
|
||||
return channel_more_to_flush(TLS_CHAN_TO_BASE(chan));
|
||||
}
|
||||
|
||||
#ifdef KEEP_TIMING_STATS
|
||||
|
||||
/**
|
||||
|
||||
@ -40,8 +40,6 @@ channel_t * channel_tls_to_base(channel_tls_t *tlschan);
|
||||
channel_tls_t * channel_tls_from_base(channel_t *chan);
|
||||
|
||||
/* Things for connection_or.c to call back into */
|
||||
ssize_t channel_tls_flush_some_cells(channel_tls_t *chan, ssize_t num_cells);
|
||||
int channel_tls_more_to_flush(channel_tls_t *chan);
|
||||
void channel_tls_handle_cell(cell_t *cell, or_connection_t *conn);
|
||||
void channel_tls_handle_state_change_on_orconn(channel_tls_t *chan,
|
||||
or_connection_t *conn,
|
||||
|
||||
@ -14,6 +14,7 @@
|
||||
#include "or.h"
|
||||
#include "channel.h"
|
||||
#include "circpathbias.h"
|
||||
#define CIRCUITBUILD_PRIVATE
|
||||
#include "circuitbuild.h"
|
||||
#include "circuitlist.h"
|
||||
#include "circuitstats.h"
|
||||
|
||||
@ -302,8 +302,8 @@ channel_note_destroy_pending(channel_t *chan, circid_t id)
|
||||
|
||||
/** Called to indicate that a DESTROY is no longer pending on <b>chan</b> with
|
||||
* circuit ID <b>id</b> -- typically, because it has been sent. */
|
||||
void
|
||||
channel_note_destroy_not_pending(channel_t *chan, circid_t id)
|
||||
MOCK_IMPL(void, channel_note_destroy_not_pending,
|
||||
(channel_t *chan, circid_t id))
|
||||
{
|
||||
circuit_t *circ = circuit_get_by_circid_channel_even_if_marked(id,chan);
|
||||
if (circ) {
|
||||
|
||||
@ -72,7 +72,8 @@ void circuit_free_all(void);
|
||||
void circuits_handle_oom(size_t current_allocation);
|
||||
|
||||
void channel_note_destroy_pending(channel_t *chan, circid_t id);
|
||||
void channel_note_destroy_not_pending(channel_t *chan, circid_t id);
|
||||
MOCK_DECL(void, channel_note_destroy_not_pending,
|
||||
(channel_t *chan, circid_t id));
|
||||
|
||||
#ifdef CIRCUITLIST_PRIVATE
|
||||
STATIC void circuit_free(circuit_t *circ);
|
||||
|
||||
@ -621,8 +621,8 @@ circuitmux_clear_policy(circuitmux_t *cmux)
|
||||
* Return the policy currently installed on a circuitmux_t
|
||||
*/
|
||||
|
||||
const circuitmux_policy_t *
|
||||
circuitmux_get_policy(circuitmux_t *cmux)
|
||||
MOCK_IMPL(const circuitmux_policy_t *,
|
||||
circuitmux_get_policy, (circuitmux_t *cmux))
|
||||
{
|
||||
tor_assert(cmux);
|
||||
|
||||
@ -896,8 +896,8 @@ circuitmux_num_cells_for_circuit(circuitmux_t *cmux, circuit_t *circ)
|
||||
* Query total number of available cells on a circuitmux
|
||||
*/
|
||||
|
||||
unsigned int
|
||||
circuitmux_num_cells(circuitmux_t *cmux)
|
||||
MOCK_IMPL(unsigned int,
|
||||
circuitmux_num_cells, (circuitmux_t *cmux))
|
||||
{
|
||||
tor_assert(cmux);
|
||||
|
||||
@ -1951,3 +1951,51 @@ circuitmux_count_queued_destroy_cells(const channel_t *chan,
|
||||
return n_destroy_cells;
|
||||
}
|
||||
|
||||
/**
|
||||
* Compare cmuxes to see which is more preferred; return < 0 if
|
||||
* cmux_1 has higher priority (i.e., cmux_1 < cmux_2 in the scheduler's
|
||||
* sort order), > 0 if cmux_2 has higher priority, or 0 if they are
|
||||
* equally preferred.
|
||||
*
|
||||
* If the cmuxes have different cmux policies or the policy does not
|
||||
* support the cmp_cmux method, return 0.
|
||||
*/
|
||||
|
||||
MOCK_IMPL(int,
|
||||
circuitmux_compare_muxes, (circuitmux_t *cmux_1, circuitmux_t *cmux_2))
|
||||
{
|
||||
const circuitmux_policy_t *policy;
|
||||
|
||||
tor_assert(cmux_1);
|
||||
tor_assert(cmux_2);
|
||||
|
||||
if (cmux_1 == cmux_2) {
|
||||
/* Equivalent because they're the same cmux */
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (cmux_1->policy && cmux_2->policy) {
|
||||
if (cmux_1->policy == cmux_2->policy) {
|
||||
policy = cmux_1->policy;
|
||||
|
||||
if (policy->cmp_cmux) {
|
||||
/* Okay, we can compare! */
|
||||
return policy->cmp_cmux(cmux_1, cmux_1->policy_data,
|
||||
cmux_2, cmux_2->policy_data);
|
||||
} else {
|
||||
/*
|
||||
* Equivalent because the policy doesn't know how to compare between
|
||||
* muxes.
|
||||
*/
|
||||
return 0;
|
||||
}
|
||||
} else {
|
||||
/* Equivalent because they have different policies */
|
||||
return 0;
|
||||
}
|
||||
} else {
|
||||
/* Equivalent because one or both are missing a policy */
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -57,6 +57,9 @@ struct circuitmux_policy_s {
|
||||
/* Choose a circuit */
|
||||
circuit_t * (*pick_active_circuit)(circuitmux_t *cmux,
|
||||
circuitmux_policy_data_t *pol_data);
|
||||
/* Optional: channel comparator for use by the scheduler */
|
||||
int (*cmp_cmux)(circuitmux_t *cmux_1, circuitmux_policy_data_t *pol_data_1,
|
||||
circuitmux_t *cmux_2, circuitmux_policy_data_t *pol_data_2);
|
||||
};
|
||||
|
||||
/*
|
||||
@ -105,7 +108,8 @@ void circuitmux_free(circuitmux_t *cmux);
|
||||
|
||||
/* Policy control */
|
||||
void circuitmux_clear_policy(circuitmux_t *cmux);
|
||||
const circuitmux_policy_t * circuitmux_get_policy(circuitmux_t *cmux);
|
||||
MOCK_DECL(const circuitmux_policy_t *,
|
||||
circuitmux_get_policy, (circuitmux_t *cmux));
|
||||
void circuitmux_set_policy(circuitmux_t *cmux,
|
||||
const circuitmux_policy_t *pol);
|
||||
|
||||
@ -117,7 +121,7 @@ int circuitmux_is_circuit_attached(circuitmux_t *cmux, circuit_t *circ);
|
||||
int circuitmux_is_circuit_active(circuitmux_t *cmux, circuit_t *circ);
|
||||
unsigned int circuitmux_num_cells_for_circuit(circuitmux_t *cmux,
|
||||
circuit_t *circ);
|
||||
unsigned int circuitmux_num_cells(circuitmux_t *cmux);
|
||||
MOCK_DECL(unsigned int, circuitmux_num_cells, (circuitmux_t *cmux));
|
||||
unsigned int circuitmux_num_circuits(circuitmux_t *cmux);
|
||||
unsigned int circuitmux_num_active_circuits(circuitmux_t *cmux);
|
||||
|
||||
@ -148,5 +152,9 @@ void circuitmux_append_destroy_cell(channel_t *chan,
|
||||
void circuitmux_mark_destroyed_circids_usable(circuitmux_t *cmux,
|
||||
channel_t *chan);
|
||||
|
||||
/* Optional interchannel comparisons for scheduling */
|
||||
MOCK_DECL(int, circuitmux_compare_muxes,
|
||||
(circuitmux_t *cmux_1, circuitmux_t *cmux_2));
|
||||
|
||||
#endif /* TOR_CIRCUITMUX_H */
|
||||
|
||||
|
||||
@ -187,6 +187,9 @@ ewma_notify_xmit_cells(circuitmux_t *cmux,
|
||||
static circuit_t *
|
||||
ewma_pick_active_circuit(circuitmux_t *cmux,
|
||||
circuitmux_policy_data_t *pol_data);
|
||||
static int
|
||||
ewma_cmp_cmux(circuitmux_t *cmux_1, circuitmux_policy_data_t *pol_data_1,
|
||||
circuitmux_t *cmux_2, circuitmux_policy_data_t *pol_data_2);
|
||||
|
||||
/*** EWMA global variables ***/
|
||||
|
||||
@ -209,7 +212,8 @@ circuitmux_policy_t ewma_policy = {
|
||||
/*.notify_circ_inactive =*/ ewma_notify_circ_inactive,
|
||||
/*.notify_set_n_cells =*/ NULL, /* EWMA doesn't need this */
|
||||
/*.notify_xmit_cells =*/ ewma_notify_xmit_cells,
|
||||
/*.pick_active_circuit =*/ ewma_pick_active_circuit
|
||||
/*.pick_active_circuit =*/ ewma_pick_active_circuit,
|
||||
/*.cmp_cmux =*/ ewma_cmp_cmux
|
||||
};
|
||||
|
||||
/*** EWMA method implementations using the below EWMA helper functions ***/
|
||||
@ -453,6 +457,58 @@ ewma_pick_active_circuit(circuitmux_t *cmux,
|
||||
return circ;
|
||||
}
|
||||
|
||||
/**
|
||||
* Compare two EWMA cmuxes, and return -1, 0 or 1 to indicate which should
|
||||
* be more preferred - see circuitmux_compare_muxes() of circuitmux.c.
|
||||
*/
|
||||
|
||||
static int
|
||||
ewma_cmp_cmux(circuitmux_t *cmux_1, circuitmux_policy_data_t *pol_data_1,
|
||||
circuitmux_t *cmux_2, circuitmux_policy_data_t *pol_data_2)
|
||||
{
|
||||
ewma_policy_data_t *p1 = NULL, *p2 = NULL;
|
||||
cell_ewma_t *ce1 = NULL, *ce2 = NULL;
|
||||
|
||||
tor_assert(cmux_1);
|
||||
tor_assert(pol_data_1);
|
||||
tor_assert(cmux_2);
|
||||
tor_assert(pol_data_2);
|
||||
|
||||
p1 = TO_EWMA_POL_DATA(pol_data_1);
|
||||
p2 = TO_EWMA_POL_DATA(pol_data_1);
|
||||
|
||||
if (p1 != p2) {
|
||||
/* Get the head cell_ewma_t from each queue */
|
||||
if (smartlist_len(p1->active_circuit_pqueue) > 0) {
|
||||
ce1 = smartlist_get(p1->active_circuit_pqueue, 0);
|
||||
}
|
||||
|
||||
if (smartlist_len(p2->active_circuit_pqueue) > 0) {
|
||||
ce2 = smartlist_get(p2->active_circuit_pqueue, 0);
|
||||
}
|
||||
|
||||
/* Got both of them? */
|
||||
if (ce1 != NULL && ce2 != NULL) {
|
||||
/* Pick whichever one has the better best circuit */
|
||||
return compare_cell_ewma_counts(ce1, ce2);
|
||||
} else {
|
||||
if (ce1 != NULL ) {
|
||||
/* We only have a circuit on cmux_1, so prefer it */
|
||||
return -1;
|
||||
} else if (ce2 != NULL) {
|
||||
/* We only have a circuit on cmux_2, so prefer it */
|
||||
return 1;
|
||||
} else {
|
||||
/* No circuits at all; no preference */
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
/* We got identical params */
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/** Helper for sorting cell_ewma_t values in their priority queue. */
|
||||
static int
|
||||
compare_cell_ewma_counts(const void *p1, const void *p2)
|
||||
|
||||
@ -43,6 +43,7 @@
|
||||
#include "util.h"
|
||||
#include "routerlist.h"
|
||||
#include "routerset.h"
|
||||
#include "scheduler.h"
|
||||
#include "statefile.h"
|
||||
#include "transports.h"
|
||||
#include "ext_orport.h"
|
||||
@ -368,6 +369,9 @@ static config_var_t option_vars_[] = {
|
||||
V(ServerDNSSearchDomains, BOOL, "0"),
|
||||
V(ServerDNSTestAddresses, CSV,
|
||||
"www.google.com,www.mit.edu,www.yahoo.com,www.slashdot.org"),
|
||||
V(SchedulerLowWaterMark, MEMUNIT, "16 kB"),
|
||||
V(SchedulerHighWaterMark, MEMUNIT, "32 kB"),
|
||||
V(SchedulerMaxFlushCells, UINT, "16"),
|
||||
V(ShutdownWaitLength, INTERVAL, "30 seconds"),
|
||||
V(SocksListenAddress, LINELIST, NULL),
|
||||
V(SocksPolicy, LINELIST, NULL),
|
||||
@ -1045,6 +1049,14 @@ options_act_reversible(const or_options_t *old_options, char **msg)
|
||||
if (running_tor && !libevent_initialized) {
|
||||
init_libevent(options);
|
||||
libevent_initialized = 1;
|
||||
|
||||
/*
|
||||
* Initialize the scheduler - this has to come after
|
||||
* options_init_from_torrc() sets up libevent - why yes, that seems
|
||||
* completely sensible to hide the libevent setup in the option parsing
|
||||
* code! It also needs to happen before init_keys(), so it needs to
|
||||
* happen here too. How yucky. */
|
||||
scheduler_init();
|
||||
}
|
||||
|
||||
/* Adjust the port configuration so we can launch listeners. */
|
||||
@ -1526,6 +1538,25 @@ options_act(const or_options_t *old_options)
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Set up scheduler thresholds */
|
||||
if (options->SchedulerLowWaterMark > 0 &&
|
||||
options->SchedulerHighWaterMark > options->SchedulerLowWaterMark) {
|
||||
scheduler_set_watermarks(options->SchedulerLowWaterMark,
|
||||
options->SchedulerHighWaterMark,
|
||||
(options->SchedulerMaxFlushCells > 0) ?
|
||||
options->SchedulerMaxFlushCells : 16);
|
||||
} else {
|
||||
if (options->SchedulerLowWaterMark == 0) {
|
||||
log_warn(LD_GENERAL, "Bad SchedulerLowWaterMark option");
|
||||
}
|
||||
|
||||
if (options->SchedulerHighWaterMark <= options->SchedulerLowWaterMark) {
|
||||
log_warn(LD_GENERAL, "Bad SchedulerHighWaterMark option");
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Set up accounting */
|
||||
if (accounting_parse_options(options, 0)<0) {
|
||||
log_warn(LD_CONFIG,"Error in accounting options");
|
||||
@ -2269,8 +2300,8 @@ resolve_my_address(int warn_severity, const or_options_t *options,
|
||||
/** Return true iff <b>addr</b> is judged to be on the same network as us, or
|
||||
* on a private network.
|
||||
*/
|
||||
int
|
||||
is_local_addr(const tor_addr_t *addr)
|
||||
MOCK_IMPL(int,
|
||||
is_local_addr, (const tor_addr_t *addr))
|
||||
{
|
||||
if (tor_addr_is_internal(addr, 0))
|
||||
return 1;
|
||||
|
||||
@ -33,7 +33,7 @@ void reset_last_resolved_addr(void);
|
||||
int resolve_my_address(int warn_severity, const or_options_t *options,
|
||||
uint32_t *addr_out,
|
||||
const char **method_out, char **hostname_out);
|
||||
int is_local_addr(const tor_addr_t *addr);
|
||||
MOCK_DECL(int, is_local_addr, (const tor_addr_t *addr));
|
||||
void options_init(or_options_t *options);
|
||||
|
||||
#define OPTIONS_DUMP_MINIMAL 1
|
||||
|
||||
@ -3839,6 +3839,8 @@ connection_handle_write_impl(connection_t *conn, int force)
|
||||
tor_tls_get_n_raw_bytes(or_conn->tls, &n_read, &n_written);
|
||||
log_debug(LD_GENERAL, "After TLS write of %d: %ld read, %ld written",
|
||||
result, (long)n_read, (long)n_written);
|
||||
or_conn->bytes_xmitted += result;
|
||||
or_conn->bytes_xmitted_by_tls += n_written;
|
||||
/* So we notice bytes were written even on error */
|
||||
/* XXXX024 This cast is safe since we can never write INT_MAX bytes in a
|
||||
* single set of TLS operations. But it looks kinda ugly. If we refactor
|
||||
|
||||
@ -38,6 +38,8 @@
|
||||
#include "router.h"
|
||||
#include "routerlist.h"
|
||||
#include "ext_orport.h"
|
||||
#include "scheduler.h"
|
||||
|
||||
#ifdef USE_BUFFEREVENTS
|
||||
#include <event2/bufferevent_ssl.h>
|
||||
#endif
|
||||
@ -574,48 +576,51 @@ connection_or_process_inbuf(or_connection_t *conn)
|
||||
return ret;
|
||||
}
|
||||
|
||||
/** When adding cells to an OR connection's outbuf, keep adding until the
|
||||
* outbuf is at least this long, or we run out of cells. */
|
||||
#define OR_CONN_HIGHWATER (32*1024)
|
||||
|
||||
/** Add cells to an OR connection's outbuf whenever the outbuf's data length
|
||||
* drops below this size. */
|
||||
#define OR_CONN_LOWWATER (16*1024)
|
||||
|
||||
/** Called whenever we have flushed some data on an or_conn: add more data
|
||||
* from active circuits. */
|
||||
int
|
||||
connection_or_flushed_some(or_connection_t *conn)
|
||||
{
|
||||
size_t datalen, temp;
|
||||
ssize_t n, flushed;
|
||||
size_t cell_network_size = get_cell_network_size(conn->wide_circ_ids);
|
||||
size_t datalen;
|
||||
|
||||
/* The channel will want to update its estimated queue size */
|
||||
channel_update_xmit_queue_size(TLS_CHAN_TO_BASE(conn->chan));
|
||||
|
||||
/* If we're under the low water mark, add cells until we're just over the
|
||||
* high water mark. */
|
||||
datalen = connection_get_outbuf_len(TO_CONN(conn));
|
||||
if (datalen < OR_CONN_LOWWATER) {
|
||||
while ((conn->chan) && channel_tls_more_to_flush(conn->chan)) {
|
||||
/* Compute how many more cells we want at most */
|
||||
n = CEIL_DIV(OR_CONN_HIGHWATER - datalen, cell_network_size);
|
||||
/* Bail out if we don't want any more */
|
||||
if (n <= 0) break;
|
||||
/* We're still here; try to flush some more cells */
|
||||
flushed = channel_tls_flush_some_cells(conn->chan, n);
|
||||
/* Bail out if it says it didn't flush anything */
|
||||
if (flushed <= 0) break;
|
||||
/* How much in the outbuf now? */
|
||||
temp = connection_get_outbuf_len(TO_CONN(conn));
|
||||
/* Bail out if we didn't actually increase the outbuf size */
|
||||
if (temp <= datalen) break;
|
||||
/* Update datalen for the next iteration */
|
||||
datalen = temp;
|
||||
}
|
||||
/* Let the scheduler know */
|
||||
scheduler_channel_wants_writes(TLS_CHAN_TO_BASE(conn->chan));
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/** This is for channeltls.c to ask how many cells we could accept if
|
||||
* they were available. */
|
||||
ssize_t
|
||||
connection_or_num_cells_writeable(or_connection_t *conn)
|
||||
{
|
||||
size_t datalen, cell_network_size;
|
||||
ssize_t n = 0;
|
||||
|
||||
tor_assert(conn);
|
||||
|
||||
/*
|
||||
* If we're under the high water mark, we're potentially
|
||||
* writeable; note this is different from the calculation above
|
||||
* used to trigger when to start writing after we've stopped.
|
||||
*/
|
||||
datalen = connection_get_outbuf_len(TO_CONN(conn));
|
||||
if (datalen < OR_CONN_HIGHWATER) {
|
||||
cell_network_size = get_cell_network_size(conn->wide_circ_ids);
|
||||
n = CEIL_DIV(OR_CONN_HIGHWATER - datalen, cell_network_size);
|
||||
}
|
||||
|
||||
return n;
|
||||
}
|
||||
|
||||
/** Connection <b>conn</b> has finished writing and has no bytes left on
|
||||
* its outbuf.
|
||||
*
|
||||
@ -1169,10 +1174,10 @@ connection_or_notify_error(or_connection_t *conn,
|
||||
*
|
||||
* Return the launched conn, or NULL if it failed.
|
||||
*/
|
||||
or_connection_t *
|
||||
connection_or_connect(const tor_addr_t *_addr, uint16_t port,
|
||||
const char *id_digest,
|
||||
channel_tls_t *chan)
|
||||
|
||||
MOCK_IMPL(or_connection_t *,
|
||||
connection_or_connect, (const tor_addr_t *_addr, uint16_t port,
|
||||
const char *id_digest, channel_tls_t *chan))
|
||||
{
|
||||
or_connection_t *conn;
|
||||
const or_options_t *options = get_options();
|
||||
|
||||
@ -24,6 +24,7 @@ void connection_or_set_bad_connections(const char *digest, int force);
|
||||
void connection_or_block_renegotiation(or_connection_t *conn);
|
||||
int connection_or_reached_eof(or_connection_t *conn);
|
||||
int connection_or_process_inbuf(or_connection_t *conn);
|
||||
ssize_t connection_or_num_cells_writeable(or_connection_t *conn);
|
||||
int connection_or_flushed_some(or_connection_t *conn);
|
||||
int connection_or_finished_flushing(or_connection_t *conn);
|
||||
int connection_or_finished_connecting(or_connection_t *conn);
|
||||
@ -36,9 +37,10 @@ void connection_or_connect_failed(or_connection_t *conn,
|
||||
int reason, const char *msg);
|
||||
void connection_or_notify_error(or_connection_t *conn,
|
||||
int reason, const char *msg);
|
||||
or_connection_t *connection_or_connect(const tor_addr_t *addr, uint16_t port,
|
||||
const char *id_digest,
|
||||
channel_tls_t *chan);
|
||||
MOCK_DECL(or_connection_t *,
|
||||
connection_or_connect,
|
||||
(const tor_addr_t *addr, uint16_t port,
|
||||
const char *id_digest, channel_tls_t *chan));
|
||||
|
||||
void connection_or_close_normally(or_connection_t *orconn, int flush);
|
||||
void connection_or_close_for_error(or_connection_t *orconn, int flush);
|
||||
|
||||
@ -74,6 +74,7 @@ LIBTOR_A_SOURCES = \
|
||||
src/or/routerlist.c \
|
||||
src/or/routerparse.c \
|
||||
src/or/routerset.c \
|
||||
src/or/scheduler.c \
|
||||
src/or/statefile.c \
|
||||
src/or/status.c \
|
||||
src/or/onion_ntor.c \
|
||||
@ -179,6 +180,7 @@ ORHEADERS = \
|
||||
src/or/routerlist.h \
|
||||
src/or/routerset.h \
|
||||
src/or/routerparse.h \
|
||||
src/or/scheduler.h \
|
||||
src/or/statefile.h \
|
||||
src/or/status.h
|
||||
|
||||
|
||||
@ -53,6 +53,7 @@
|
||||
#include "router.h"
|
||||
#include "routerlist.h"
|
||||
#include "routerparse.h"
|
||||
#include "scheduler.h"
|
||||
#include "statefile.h"
|
||||
#include "status.h"
|
||||
#include "util_process.h"
|
||||
@ -2583,6 +2584,7 @@ tor_free_all(int postfork)
|
||||
channel_tls_free_all();
|
||||
channel_free_all();
|
||||
connection_free_all();
|
||||
scheduler_free_all();
|
||||
buf_shrink_freelists(1);
|
||||
memarea_clear_freelist();
|
||||
nodelist_free_all();
|
||||
|
||||
30
src/or/or.h
30
src/or/or.h
@ -1431,6 +1431,18 @@ typedef struct or_handshake_state_t {
|
||||
|
||||
/** Length of Extended ORPort connection identifier. */
|
||||
#define EXT_OR_CONN_ID_LEN DIGEST_LEN /* 20 */
|
||||
/*
|
||||
* OR_CONN_HIGHWATER and OR_CONN_LOWWATER moved from connection_or.c so
|
||||
* channeltls.c can see them too.
|
||||
*/
|
||||
|
||||
/** When adding cells to an OR connection's outbuf, keep adding until the
|
||||
* outbuf is at least this long, or we run out of cells. */
|
||||
#define OR_CONN_HIGHWATER (32*1024)
|
||||
|
||||
/** Add cells to an OR connection's outbuf whenever the outbuf's data length
|
||||
* drops below this size. */
|
||||
#define OR_CONN_LOWWATER (16*1024)
|
||||
|
||||
/** Subtype of connection_t for an "OR connection" -- that is, one that speaks
|
||||
* cells over TLS. */
|
||||
@ -1522,6 +1534,12 @@ typedef struct or_connection_t {
|
||||
/** Last emptied write token bucket in msec since midnight; only used if
|
||||
* TB_EMPTY events are enabled. */
|
||||
uint32_t write_emptied_time;
|
||||
|
||||
/*
|
||||
* Count the number of bytes flushed out on this orconn, and the number of
|
||||
* bytes TLS actually sent - used for overhead estimation for scheduling.
|
||||
*/
|
||||
uint64_t bytes_xmitted, bytes_xmitted_by_tls;
|
||||
} or_connection_t;
|
||||
|
||||
/** Subtype of connection_t for an "edge connection" -- that is, an entry (ap)
|
||||
@ -4230,6 +4248,18 @@ typedef struct {
|
||||
/** How long (seconds) do we keep a guard before picking a new one? */
|
||||
int GuardLifetime;
|
||||
|
||||
/** Low-water mark for global scheduler - start sending when estimated
|
||||
* queued size falls below this threshold.
|
||||
*/
|
||||
uint32_t SchedulerLowWaterMark;
|
||||
/** High-water mark for global scheduler - stop sending when estimated
|
||||
* queued size exceeds this threshold.
|
||||
*/
|
||||
uint32_t SchedulerHighWaterMark;
|
||||
/** Flush size for global scheduler - flush this many cells at a time
|
||||
* when sending.
|
||||
*/
|
||||
unsigned int SchedulerMaxFlushCells;
|
||||
} or_options_t;
|
||||
|
||||
/** Persistent state for an onion router, as saved to disk. */
|
||||
|
||||
@ -39,6 +39,7 @@
|
||||
#include "router.h"
|
||||
#include "routerlist.h"
|
||||
#include "routerparse.h"
|
||||
#include "scheduler.h"
|
||||
|
||||
static edge_connection_t *relay_lookup_conn(circuit_t *circ, cell_t *cell,
|
||||
cell_direction_t cell_direction,
|
||||
@ -2591,8 +2592,8 @@ packed_cell_get_circid(const packed_cell_t *cell, int wide_circ_ids)
|
||||
* queue of the first active circuit on <b>chan</b>, and write them to
|
||||
* <b>chan</b>->outbuf. Return the number of cells written. Advance
|
||||
* the active circuit pointer to the next active circuit in the ring. */
|
||||
int
|
||||
channel_flush_from_first_active_circuit(channel_t *chan, int max)
|
||||
MOCK_IMPL(int,
|
||||
channel_flush_from_first_active_circuit, (channel_t *chan, int max))
|
||||
{
|
||||
circuitmux_t *cmux = NULL;
|
||||
int n_flushed = 0;
|
||||
@ -2868,14 +2869,8 @@ append_cell_to_circuit_queue(circuit_t *circ, channel_t *chan,
|
||||
log_debug(LD_GENERAL, "Made a circuit active.");
|
||||
}
|
||||
|
||||
if (!channel_has_queued_writes(chan)) {
|
||||
/* There is no data at all waiting to be sent on the outbuf. Add a
|
||||
* cell, so that we can notice when it gets flushed, flushed_some can
|
||||
* get called, and we can start putting more data onto the buffer then.
|
||||
*/
|
||||
log_debug(LD_GENERAL, "Primed a buffer.");
|
||||
channel_flush_from_first_active_circuit(chan, 1);
|
||||
}
|
||||
/* New way: mark this as having waiting cells for the scheduler */
|
||||
scheduler_channel_has_waiting_cells(chan);
|
||||
}
|
||||
|
||||
/** Append an encoded value of <b>addr</b> to <b>payload_out</b>, which must
|
||||
|
||||
@ -64,7 +64,8 @@ void append_cell_to_circuit_queue(circuit_t *circ, channel_t *chan,
|
||||
cell_t *cell, cell_direction_t direction,
|
||||
streamid_t fromstream);
|
||||
void channel_unlink_all_circuits(channel_t *chan, smartlist_t *detached_out);
|
||||
int channel_flush_from_first_active_circuit(channel_t *chan, int max);
|
||||
MOCK_DECL(int, channel_flush_from_first_active_circuit,
|
||||
(channel_t *chan, int max));
|
||||
void assert_circuit_mux_okay(channel_t *chan);
|
||||
void update_circuit_on_cmux_(circuit_t *circ, cell_direction_t direction,
|
||||
const char *file, int lineno);
|
||||
|
||||
708
src/or/scheduler.c
Normal file
708
src/or/scheduler.c
Normal file
@ -0,0 +1,708 @@
|
||||
/* * Copyright (c) 2013, The Tor Project, Inc. */
|
||||
/* See LICENSE for licensing information */
|
||||
|
||||
/**
|
||||
* \file scheduler.c
|
||||
* \brief Relay scheduling system
|
||||
**/
|
||||
|
||||
#include "or.h"
|
||||
|
||||
#define TOR_CHANNEL_INTERNAL_ /* For channel_flush_some_cells() */
|
||||
#include "channel.h"
|
||||
|
||||
#include "compat_libevent.h"
|
||||
#define SCHEDULER_PRIVATE_
|
||||
#include "scheduler.h"
|
||||
|
||||
#ifdef HAVE_EVENT2_EVENT_H
|
||||
#include <event2/event.h>
|
||||
#else
|
||||
#include <event.h>
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Scheduler high/low watermarks
|
||||
*/
|
||||
|
||||
static uint32_t sched_q_low_water = 16384;
|
||||
static uint32_t sched_q_high_water = 32768;
|
||||
|
||||
/*
|
||||
* Maximum cells to flush in a single call to channel_flush_some_cells();
|
||||
* setting this low means more calls, but too high and we could overshoot
|
||||
* sched_q_high_water.
|
||||
*/
|
||||
|
||||
static uint32_t sched_max_flush_cells = 16;
|
||||
|
||||
/*
|
||||
* Write scheduling works by keeping track of which channels can
|
||||
* accept cells, and have cells to write. From the scheduler's perspective,
|
||||
* a channel can be in four possible states:
|
||||
*
|
||||
* 1.) Not open for writes, no cells to send
|
||||
* - Not much to do here, and the channel will have scheduler_state ==
|
||||
* SCHED_CHAN_IDLE
|
||||
* - Transitions from:
|
||||
* - Open for writes/has cells by simultaneously draining all circuit
|
||||
* queues and filling the output buffer.
|
||||
* - Transitions to:
|
||||
* - Not open for writes/has cells by arrival of cells on an attached
|
||||
* circuit (this would be driven from append_cell_to_circuit_queue())
|
||||
* - Open for writes/no cells by a channel type specific path;
|
||||
* driven from connection_or_flushed_some() for channel_tls_t.
|
||||
*
|
||||
* 2.) Open for writes, no cells to send
|
||||
* - Not much here either; this will be the state an idle but open channel
|
||||
* can be expected to settle in. It will have scheduler_state ==
|
||||
* SCHED_CHAN_WAITING_FOR_CELLS
|
||||
* - Transitions from:
|
||||
* - Not open for writes/no cells by flushing some of the output
|
||||
* buffer.
|
||||
* - Open for writes/has cells by the scheduler moving cells from
|
||||
* circuit queues to channel output queue, but not having enough
|
||||
* to fill the output queue.
|
||||
* - Transitions to:
|
||||
* - Open for writes/has cells by arrival of new cells on an attached
|
||||
* circuit, in append_cell_to_circuit_queue()
|
||||
*
|
||||
* 3.) Not open for writes, cells to send
|
||||
* - This is the state of a busy circuit limited by output bandwidth;
|
||||
* cells have piled up in the circuit queues waiting to be relayed.
|
||||
* The channel will have scheduler_state == SCHED_CHAN_WAITING_TO_WRITE.
|
||||
* - Transitions from:
|
||||
* - Not open for writes/no cells by arrival of cells on an attached
|
||||
* circuit
|
||||
* - Open for writes/has cells by filling an output buffer without
|
||||
* draining all cells from attached circuits
|
||||
* - Transitions to:
|
||||
* - Opens for writes/has cells by draining some of the output buffer
|
||||
* via the connection_or_flushed_some() path (for channel_tls_t).
|
||||
*
|
||||
* 4.) Open for writes, cells to send
|
||||
* - This connection is ready to relay some cells and waiting for
|
||||
* the scheduler to choose it. The channel will have scheduler_state ==
|
||||
* SCHED_CHAN_PENDING.
|
||||
* - Transitions from:
|
||||
* - Not open for writes/has cells by the connection_or_flushed_some()
|
||||
* path
|
||||
* - Open for writes/no cells by the append_cell_to_circuit_queue()
|
||||
* path
|
||||
* - Transitions to:
|
||||
* - Not open for writes/no cells by draining all circuit queues and
|
||||
* simultaneously filling the output buffer.
|
||||
* - Not open for writes/has cells by writing enough cells to fill the
|
||||
* output buffer
|
||||
* - Open for writes/no cells by draining all attached circuit queues
|
||||
* without also filling the output buffer
|
||||
*
|
||||
* Other event-driven parts of the code move channels between these scheduling
|
||||
* states by calling scheduler functions; the scheduler only runs on open-for-
|
||||
* writes/has-cells channels and is the only path for those to transition to
|
||||
* other states. The scheduler_run() function gives us the opportunity to do
|
||||
* scheduling work, and is called from other scheduler functions whenever a
|
||||
* state transition occurs, and periodically from the main event loop.
|
||||
*/
|
||||
|
||||
/* Scheduler global data structures */
|
||||
|
||||
/*
|
||||
* We keep a list of channels that are pending - i.e, have cells to write
|
||||
* and can accept them to send. The enum scheduler_state in channel_t
|
||||
* is reserved for our use.
|
||||
*/
|
||||
|
||||
/* Pqueue of channels that can write and have cells (pending work) */
|
||||
STATIC smartlist_t *channels_pending = NULL;
|
||||
|
||||
/*
|
||||
* This event runs the scheduler from its callback, and is manually
|
||||
* activated whenever a channel enters open for writes/cells to send.
|
||||
*/
|
||||
|
||||
STATIC struct event *run_sched_ev = NULL;
|
||||
|
||||
/*
|
||||
* Queue heuristic; this is not the queue size, but an 'effective queuesize'
|
||||
* that ages out contributions from stalled channels.
|
||||
*/
|
||||
|
||||
STATIC uint64_t queue_heuristic = 0;
|
||||
|
||||
/*
|
||||
* Timestamp for last queue heuristic update
|
||||
*/
|
||||
|
||||
STATIC time_t queue_heuristic_timestamp = 0;
|
||||
|
||||
/* Scheduler static function declarations */
|
||||
|
||||
static void scheduler_evt_callback(evutil_socket_t fd,
|
||||
short events, void *arg);
|
||||
static int scheduler_more_work(void);
|
||||
static void scheduler_retrigger(void);
|
||||
#if 0
|
||||
static void scheduler_trigger(void);
|
||||
#endif
|
||||
|
||||
/* Scheduler function implementations */
|
||||
|
||||
/** Free everything and shut down the scheduling system */
|
||||
|
||||
void
|
||||
scheduler_free_all(void)
|
||||
{
|
||||
log_debug(LD_SCHED, "Shutting down scheduler");
|
||||
|
||||
if (run_sched_ev) {
|
||||
event_del(run_sched_ev);
|
||||
tor_event_free(run_sched_ev);
|
||||
run_sched_ev = NULL;
|
||||
}
|
||||
|
||||
if (channels_pending) {
|
||||
smartlist_free(channels_pending);
|
||||
channels_pending = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Comparison function to use when sorting pending channels
|
||||
*/
|
||||
|
||||
MOCK_IMPL(STATIC int,
|
||||
scheduler_compare_channels, (const void *c1_v, const void *c2_v))
|
||||
{
|
||||
channel_t *c1 = NULL, *c2 = NULL;
|
||||
/* These are a workaround for -Wbad-function-cast throwing a fit */
|
||||
const circuitmux_policy_t *p1, *p2;
|
||||
uintptr_t p1_i, p2_i;
|
||||
|
||||
tor_assert(c1_v);
|
||||
tor_assert(c2_v);
|
||||
|
||||
c1 = (channel_t *)(c1_v);
|
||||
c2 = (channel_t *)(c2_v);
|
||||
|
||||
tor_assert(c1);
|
||||
tor_assert(c2);
|
||||
|
||||
if (c1 != c2) {
|
||||
if (circuitmux_get_policy(c1->cmux) ==
|
||||
circuitmux_get_policy(c2->cmux)) {
|
||||
/* Same cmux policy, so use the mux comparison */
|
||||
return circuitmux_compare_muxes(c1->cmux, c2->cmux);
|
||||
} else {
|
||||
/*
|
||||
* Different policies; not important to get this edge case perfect
|
||||
* because the current code never actually gives different channels
|
||||
* different cmux policies anyway. Just use this arbitrary but
|
||||
* definite choice.
|
||||
*/
|
||||
p1 = circuitmux_get_policy(c1->cmux);
|
||||
p2 = circuitmux_get_policy(c2->cmux);
|
||||
p1_i = (uintptr_t)p1;
|
||||
p2_i = (uintptr_t)p2;
|
||||
|
||||
return (p1_i < p2_i) ? -1 : 1;
|
||||
}
|
||||
} else {
|
||||
/* c1 == c2, so always equal */
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Scheduler event callback; this should get triggered once per event loop
|
||||
* if any scheduling work was created during the event loop.
|
||||
*/
|
||||
|
||||
static void
|
||||
scheduler_evt_callback(evutil_socket_t fd, short events, void *arg)
|
||||
{
|
||||
(void)fd;
|
||||
(void)events;
|
||||
(void)arg;
|
||||
log_debug(LD_SCHED, "Scheduler event callback called");
|
||||
|
||||
tor_assert(run_sched_ev);
|
||||
|
||||
/* Run the scheduler */
|
||||
scheduler_run();
|
||||
|
||||
/* Do we have more work to do? */
|
||||
if (scheduler_more_work()) scheduler_retrigger();
|
||||
}
|
||||
|
||||
/** Mark a channel as no longer ready to accept writes */
|
||||
|
||||
MOCK_IMPL(void,
|
||||
scheduler_channel_doesnt_want_writes,(channel_t *chan))
|
||||
{
|
||||
tor_assert(chan);
|
||||
|
||||
tor_assert(channels_pending);
|
||||
|
||||
/* If it's already in pending, we can put it in waiting_to_write */
|
||||
if (chan->scheduler_state == SCHED_CHAN_PENDING) {
|
||||
/*
|
||||
* It's in channels_pending, so it shouldn't be in any of
|
||||
* the other lists. It can't write any more, so it goes to
|
||||
* channels_waiting_to_write.
|
||||
*/
|
||||
smartlist_pqueue_remove(channels_pending,
|
||||
scheduler_compare_channels,
|
||||
STRUCT_OFFSET(channel_t, sched_heap_idx),
|
||||
chan);
|
||||
chan->scheduler_state = SCHED_CHAN_WAITING_TO_WRITE;
|
||||
log_debug(LD_SCHED,
|
||||
"Channel " U64_FORMAT " at %p went from pending "
|
||||
"to waiting_to_write",
|
||||
U64_PRINTF_ARG(chan->global_identifier), chan);
|
||||
} else {
|
||||
/*
|
||||
* It's not in pending, so it can't become waiting_to_write; it's
|
||||
* either not in any of the lists (nothing to do) or it's already in
|
||||
* waiting_for_cells (remove it, can't write any more).
|
||||
*/
|
||||
if (chan->scheduler_state == SCHED_CHAN_WAITING_FOR_CELLS) {
|
||||
chan->scheduler_state = SCHED_CHAN_IDLE;
|
||||
log_debug(LD_SCHED,
|
||||
"Channel " U64_FORMAT " at %p left waiting_for_cells",
|
||||
U64_PRINTF_ARG(chan->global_identifier), chan);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/** Mark a channel as having waiting cells */
|
||||
|
||||
MOCK_IMPL(void,
|
||||
scheduler_channel_has_waiting_cells,(channel_t *chan))
|
||||
{
|
||||
int became_pending = 0;
|
||||
|
||||
tor_assert(chan);
|
||||
tor_assert(channels_pending);
|
||||
|
||||
/* First, check if this one also writeable */
|
||||
if (chan->scheduler_state == SCHED_CHAN_WAITING_FOR_CELLS) {
|
||||
/*
|
||||
* It's in channels_waiting_for_cells, so it shouldn't be in any of
|
||||
* the other lists. It has waiting cells now, so it goes to
|
||||
* channels_pending.
|
||||
*/
|
||||
chan->scheduler_state = SCHED_CHAN_PENDING;
|
||||
smartlist_pqueue_add(channels_pending,
|
||||
scheduler_compare_channels,
|
||||
STRUCT_OFFSET(channel_t, sched_heap_idx),
|
||||
chan);
|
||||
log_debug(LD_SCHED,
|
||||
"Channel " U64_FORMAT " at %p went from waiting_for_cells "
|
||||
"to pending",
|
||||
U64_PRINTF_ARG(chan->global_identifier), chan);
|
||||
became_pending = 1;
|
||||
} else {
|
||||
/*
|
||||
* It's not in waiting_for_cells, so it can't become pending; it's
|
||||
* either not in any of the lists (we add it to waiting_to_write)
|
||||
* or it's already in waiting_to_write or pending (we do nothing)
|
||||
*/
|
||||
if (!(chan->scheduler_state == SCHED_CHAN_WAITING_TO_WRITE ||
|
||||
chan->scheduler_state == SCHED_CHAN_PENDING)) {
|
||||
chan->scheduler_state = SCHED_CHAN_WAITING_TO_WRITE;
|
||||
log_debug(LD_SCHED,
|
||||
"Channel " U64_FORMAT " at %p entered waiting_to_write",
|
||||
U64_PRINTF_ARG(chan->global_identifier), chan);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* If we made a channel pending, we potentially have scheduling work
|
||||
* to do.
|
||||
*/
|
||||
if (became_pending) scheduler_retrigger();
|
||||
}
|
||||
|
||||
/** Set up the scheduling system */
|
||||
|
||||
void
|
||||
scheduler_init(void)
|
||||
{
|
||||
log_debug(LD_SCHED, "Initting scheduler");
|
||||
|
||||
tor_assert(!run_sched_ev);
|
||||
run_sched_ev = tor_event_new(tor_libevent_get_base(), -1,
|
||||
0, scheduler_evt_callback, NULL);
|
||||
|
||||
channels_pending = smartlist_new();
|
||||
queue_heuristic = 0;
|
||||
queue_heuristic_timestamp = approx_time();
|
||||
}
|
||||
|
||||
/** Check if there's more scheduling work */
|
||||
|
||||
static int
|
||||
scheduler_more_work(void)
|
||||
{
|
||||
tor_assert(channels_pending);
|
||||
|
||||
return ((scheduler_get_queue_heuristic() < sched_q_low_water) &&
|
||||
((smartlist_len(channels_pending) > 0))) ? 1 : 0;
|
||||
}
|
||||
|
||||
/** Retrigger the scheduler in a way safe to use from the callback */
|
||||
|
||||
static void
|
||||
scheduler_retrigger(void)
|
||||
{
|
||||
tor_assert(run_sched_ev);
|
||||
event_active(run_sched_ev, EV_TIMEOUT, 1);
|
||||
}
|
||||
|
||||
/** Notify the scheduler of a channel being closed */
|
||||
|
||||
MOCK_IMPL(void,
|
||||
scheduler_release_channel,(channel_t *chan))
|
||||
{
|
||||
tor_assert(chan);
|
||||
tor_assert(channels_pending);
|
||||
|
||||
if (chan->scheduler_state == SCHED_CHAN_PENDING) {
|
||||
smartlist_pqueue_remove(channels_pending,
|
||||
scheduler_compare_channels,
|
||||
STRUCT_OFFSET(channel_t, sched_heap_idx),
|
||||
chan);
|
||||
}
|
||||
|
||||
chan->scheduler_state = SCHED_CHAN_IDLE;
|
||||
}
|
||||
|
||||
/** Run the scheduling algorithm if necessary */
|
||||
|
||||
MOCK_IMPL(void,
|
||||
scheduler_run, (void))
|
||||
{
|
||||
int n_cells, n_chans_before, n_chans_after;
|
||||
uint64_t q_len_before, q_heur_before, q_len_after, q_heur_after;
|
||||
ssize_t flushed, flushed_this_time;
|
||||
smartlist_t *to_readd = NULL;
|
||||
channel_t *chan = NULL;
|
||||
|
||||
log_debug(LD_SCHED, "We have a chance to run the scheduler");
|
||||
|
||||
if (scheduler_get_queue_heuristic() < sched_q_low_water) {
|
||||
n_chans_before = smartlist_len(channels_pending);
|
||||
q_len_before = channel_get_global_queue_estimate();
|
||||
q_heur_before = scheduler_get_queue_heuristic();
|
||||
|
||||
while (scheduler_get_queue_heuristic() <= sched_q_high_water &&
|
||||
smartlist_len(channels_pending) > 0) {
|
||||
/* Pop off a channel */
|
||||
chan = smartlist_pqueue_pop(channels_pending,
|
||||
scheduler_compare_channels,
|
||||
STRUCT_OFFSET(channel_t, sched_heap_idx));
|
||||
tor_assert(chan);
|
||||
|
||||
/* Figure out how many cells we can write */
|
||||
n_cells = channel_num_cells_writeable(chan);
|
||||
if (n_cells > 0) {
|
||||
log_debug(LD_SCHED,
|
||||
"Scheduler saw pending channel " U64_FORMAT " at %p with "
|
||||
"%d cells writeable",
|
||||
U64_PRINTF_ARG(chan->global_identifier), chan, n_cells);
|
||||
|
||||
flushed = 0;
|
||||
while (flushed < n_cells &&
|
||||
scheduler_get_queue_heuristic() <= sched_q_high_water) {
|
||||
flushed_this_time =
|
||||
channel_flush_some_cells(chan,
|
||||
MIN(sched_max_flush_cells,
|
||||
n_cells - flushed));
|
||||
if (flushed_this_time <= 0) break;
|
||||
flushed += flushed_this_time;
|
||||
}
|
||||
|
||||
if (flushed < n_cells) {
|
||||
/* We ran out of cells to flush */
|
||||
chan->scheduler_state = SCHED_CHAN_WAITING_FOR_CELLS;
|
||||
log_debug(LD_SCHED,
|
||||
"Channel " U64_FORMAT " at %p "
|
||||
"entered waiting_for_cells from pending",
|
||||
U64_PRINTF_ARG(chan->global_identifier),
|
||||
chan);
|
||||
} else {
|
||||
/* The channel may still have some cells */
|
||||
if (channel_more_to_flush(chan)) {
|
||||
/* The channel goes to either pending or waiting_to_write */
|
||||
if (channel_num_cells_writeable(chan) > 0) {
|
||||
/* Add it back to pending later */
|
||||
if (!to_readd) to_readd = smartlist_new();
|
||||
smartlist_add(to_readd, chan);
|
||||
log_debug(LD_SCHED,
|
||||
"Channel " U64_FORMAT " at %p "
|
||||
"is still pending",
|
||||
U64_PRINTF_ARG(chan->global_identifier),
|
||||
chan);
|
||||
} else {
|
||||
/* It's waiting to be able to write more */
|
||||
chan->scheduler_state = SCHED_CHAN_WAITING_TO_WRITE;
|
||||
log_debug(LD_SCHED,
|
||||
"Channel " U64_FORMAT " at %p "
|
||||
"entered waiting_to_write from pending",
|
||||
U64_PRINTF_ARG(chan->global_identifier),
|
||||
chan);
|
||||
}
|
||||
} else {
|
||||
/* No cells left; it can go to idle or waiting_for_cells */
|
||||
if (channel_num_cells_writeable(chan) > 0) {
|
||||
/*
|
||||
* It can still accept writes, so it goes to
|
||||
* waiting_for_cells
|
||||
*/
|
||||
chan->scheduler_state = SCHED_CHAN_WAITING_FOR_CELLS;
|
||||
log_debug(LD_SCHED,
|
||||
"Channel " U64_FORMAT " at %p "
|
||||
"entered waiting_for_cells from pending",
|
||||
U64_PRINTF_ARG(chan->global_identifier),
|
||||
chan);
|
||||
} else {
|
||||
/*
|
||||
* We exactly filled up the output queue with all available
|
||||
* cells; go to idle.
|
||||
*/
|
||||
chan->scheduler_state = SCHED_CHAN_IDLE;
|
||||
log_debug(LD_SCHED,
|
||||
"Channel " U64_FORMAT " at %p "
|
||||
"become idle from pending",
|
||||
U64_PRINTF_ARG(chan->global_identifier),
|
||||
chan);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
log_debug(LD_SCHED,
|
||||
"Scheduler flushed %d cells onto pending channel "
|
||||
U64_FORMAT " at %p",
|
||||
(int)flushed, U64_PRINTF_ARG(chan->global_identifier),
|
||||
chan);
|
||||
} else {
|
||||
log_info(LD_SCHED,
|
||||
"Scheduler saw pending channel " U64_FORMAT " at %p with "
|
||||
"no cells writeable",
|
||||
U64_PRINTF_ARG(chan->global_identifier), chan);
|
||||
/* Put it back to WAITING_TO_WRITE */
|
||||
chan->scheduler_state = SCHED_CHAN_WAITING_TO_WRITE;
|
||||
}
|
||||
}
|
||||
|
||||
/* Readd any channels we need to */
|
||||
if (to_readd) {
|
||||
SMARTLIST_FOREACH_BEGIN(to_readd, channel_t *, chan) {
|
||||
chan->scheduler_state = SCHED_CHAN_PENDING;
|
||||
smartlist_pqueue_add(channels_pending,
|
||||
scheduler_compare_channels,
|
||||
STRUCT_OFFSET(channel_t, sched_heap_idx),
|
||||
chan);
|
||||
} SMARTLIST_FOREACH_END(chan);
|
||||
smartlist_free(to_readd);
|
||||
}
|
||||
|
||||
n_chans_after = smartlist_len(channels_pending);
|
||||
q_len_after = channel_get_global_queue_estimate();
|
||||
q_heur_after = scheduler_get_queue_heuristic();
|
||||
log_debug(LD_SCHED,
|
||||
"Scheduler handled %d of %d pending channels, queue size from "
|
||||
U64_FORMAT " to " U64_FORMAT ", queue heuristic from "
|
||||
U64_FORMAT " to " U64_FORMAT,
|
||||
n_chans_before - n_chans_after, n_chans_before,
|
||||
U64_PRINTF_ARG(q_len_before), U64_PRINTF_ARG(q_len_after),
|
||||
U64_PRINTF_ARG(q_heur_before), U64_PRINTF_ARG(q_heur_after));
|
||||
}
|
||||
}
|
||||
|
||||
/** Trigger the scheduling event so we run the scheduler later */
|
||||
|
||||
#if 0
|
||||
static void
|
||||
scheduler_trigger(void)
|
||||
{
|
||||
log_debug(LD_SCHED, "Triggering scheduler event");
|
||||
|
||||
tor_assert(run_sched_ev);
|
||||
|
||||
event_add(run_sched_ev, EV_TIMEOUT, 1);
|
||||
}
|
||||
#endif
|
||||
|
||||
/** Mark a channel as ready to accept writes */
|
||||
|
||||
void
|
||||
scheduler_channel_wants_writes(channel_t *chan)
|
||||
{
|
||||
int became_pending = 0;
|
||||
|
||||
tor_assert(chan);
|
||||
tor_assert(channels_pending);
|
||||
|
||||
/* If it's already in waiting_to_write, we can put it in pending */
|
||||
if (chan->scheduler_state == SCHED_CHAN_WAITING_TO_WRITE) {
|
||||
/*
|
||||
* It can write now, so it goes to channels_pending.
|
||||
*/
|
||||
smartlist_pqueue_add(channels_pending,
|
||||
scheduler_compare_channels,
|
||||
STRUCT_OFFSET(channel_t, sched_heap_idx),
|
||||
chan);
|
||||
chan->scheduler_state = SCHED_CHAN_PENDING;
|
||||
log_debug(LD_SCHED,
|
||||
"Channel " U64_FORMAT " at %p went from waiting_to_write "
|
||||
"to pending",
|
||||
U64_PRINTF_ARG(chan->global_identifier), chan);
|
||||
became_pending = 1;
|
||||
} else {
|
||||
/*
|
||||
* It's not in SCHED_CHAN_WAITING_TO_WRITE, so it can't become pending;
|
||||
* it's either idle and goes to WAITING_FOR_CELLS, or it's a no-op.
|
||||
*/
|
||||
if (!(chan->scheduler_state == SCHED_CHAN_WAITING_FOR_CELLS ||
|
||||
chan->scheduler_state == SCHED_CHAN_PENDING)) {
|
||||
chan->scheduler_state = SCHED_CHAN_WAITING_FOR_CELLS;
|
||||
log_debug(LD_SCHED,
|
||||
"Channel " U64_FORMAT " at %p entered waiting_for_cells",
|
||||
U64_PRINTF_ARG(chan->global_identifier), chan);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* If we made a channel pending, we potentially have scheduling work
|
||||
* to do.
|
||||
*/
|
||||
if (became_pending) scheduler_retrigger();
|
||||
}
|
||||
|
||||
/**
|
||||
* Notify the scheduler that a channel's position in the pqueue may have
|
||||
* changed
|
||||
*/
|
||||
|
||||
void
|
||||
scheduler_touch_channel(channel_t *chan)
|
||||
{
|
||||
tor_assert(chan);
|
||||
|
||||
if (chan->scheduler_state == SCHED_CHAN_PENDING) {
|
||||
/* Remove and re-add it */
|
||||
smartlist_pqueue_remove(channels_pending,
|
||||
scheduler_compare_channels,
|
||||
STRUCT_OFFSET(channel_t, sched_heap_idx),
|
||||
chan);
|
||||
smartlist_pqueue_add(channels_pending,
|
||||
scheduler_compare_channels,
|
||||
STRUCT_OFFSET(channel_t, sched_heap_idx),
|
||||
chan);
|
||||
}
|
||||
/* else no-op, since it isn't in the queue */
|
||||
}
|
||||
|
||||
/**
|
||||
* Notify the scheduler of a queue size adjustment, to recalculate the
|
||||
* queue heuristic.
|
||||
*/
|
||||
|
||||
void
|
||||
scheduler_adjust_queue_size(channel_t *chan, char dir, uint64_t adj)
|
||||
{
|
||||
time_t now = approx_time();
|
||||
|
||||
log_debug(LD_SCHED,
|
||||
"Queue size adjustment by %s" U64_FORMAT " for channel "
|
||||
U64_FORMAT,
|
||||
(dir >= 0) ? "+" : "-",
|
||||
U64_PRINTF_ARG(adj),
|
||||
U64_PRINTF_ARG(chan->global_identifier));
|
||||
|
||||
/* Get the queue heuristic up to date */
|
||||
scheduler_update_queue_heuristic(now);
|
||||
|
||||
/* Adjust as appropriate */
|
||||
if (dir >= 0) {
|
||||
/* Increasing it */
|
||||
queue_heuristic += adj;
|
||||
} else {
|
||||
/* Decreasing it */
|
||||
if (queue_heuristic > adj) queue_heuristic -= adj;
|
||||
else queue_heuristic = 0;
|
||||
}
|
||||
|
||||
log_debug(LD_SCHED,
|
||||
"Queue heuristic is now " U64_FORMAT,
|
||||
U64_PRINTF_ARG(queue_heuristic));
|
||||
}
|
||||
|
||||
/**
|
||||
* Query the current value of the queue heuristic
|
||||
*/
|
||||
|
||||
STATIC uint64_t
|
||||
scheduler_get_queue_heuristic(void)
|
||||
{
|
||||
time_t now = approx_time();
|
||||
|
||||
scheduler_update_queue_heuristic(now);
|
||||
|
||||
return queue_heuristic;
|
||||
}
|
||||
|
||||
/**
|
||||
* Adjust the queue heuristic value to the present time
|
||||
*/
|
||||
|
||||
STATIC void
|
||||
scheduler_update_queue_heuristic(time_t now)
|
||||
{
|
||||
time_t diff;
|
||||
|
||||
if (queue_heuristic_timestamp == 0) {
|
||||
/*
|
||||
* Nothing we can sensibly do; must not have been initted properly.
|
||||
* Oh well.
|
||||
*/
|
||||
queue_heuristic_timestamp = now;
|
||||
} else if (queue_heuristic_timestamp < now) {
|
||||
diff = now - queue_heuristic_timestamp;
|
||||
/*
|
||||
* This is a simple exponential age-out; the other proposed alternative
|
||||
* was a linear age-out using the bandwidth history in rephist.c; I'm
|
||||
* going with this out of concern that if an adversary can jam the
|
||||
* scheduler long enough, it would cause the bandwidth to drop to
|
||||
* zero and render the aging mechanism ineffective thereafter.
|
||||
*/
|
||||
if (0 <= diff && diff < 64) queue_heuristic >>= diff;
|
||||
else queue_heuristic = 0;
|
||||
|
||||
queue_heuristic_timestamp = now;
|
||||
|
||||
log_debug(LD_SCHED,
|
||||
"Queue heuristic is now " U64_FORMAT,
|
||||
U64_PRINTF_ARG(queue_heuristic));
|
||||
}
|
||||
/* else no update needed, or time went backward */
|
||||
}
|
||||
|
||||
/**
|
||||
* Set scheduler watermarks and flush size
|
||||
*/
|
||||
|
||||
void
|
||||
scheduler_set_watermarks(uint32_t lo, uint32_t hi, uint32_t max_flush)
|
||||
{
|
||||
/* Sanity assertions - caller should ensure these are true */
|
||||
tor_assert(lo > 0);
|
||||
tor_assert(hi > lo);
|
||||
tor_assert(max_flush > 0);
|
||||
|
||||
sched_q_low_water = lo;
|
||||
sched_q_high_water = hi;
|
||||
sched_max_flush_cells = max_flush;
|
||||
}
|
||||
50
src/or/scheduler.h
Normal file
50
src/or/scheduler.h
Normal file
@ -0,0 +1,50 @@
|
||||
/* * Copyright (c) 2013, The Tor Project, Inc. */
|
||||
/* See LICENSE for licensing information */
|
||||
|
||||
/**
|
||||
* \file scheduler.h
|
||||
* \brief Header file for scheduler.c
|
||||
**/
|
||||
|
||||
#ifndef TOR_SCHEDULER_H
|
||||
#define TOR_SCHEDULER_H
|
||||
|
||||
#include "or.h"
|
||||
#include "channel.h"
|
||||
#include "testsupport.h"
|
||||
|
||||
/* Global-visibility scheduler functions */
|
||||
|
||||
/* Set up and shut down the scheduler from main.c */
|
||||
void scheduler_free_all(void);
|
||||
void scheduler_init(void);
|
||||
MOCK_DECL(void, scheduler_run, (void));
|
||||
|
||||
/* Mark channels as having cells or wanting/not wanting writes */
|
||||
MOCK_DECL(void,scheduler_channel_doesnt_want_writes,(channel_t *chan));
|
||||
MOCK_DECL(void,scheduler_channel_has_waiting_cells,(channel_t *chan));
|
||||
void scheduler_channel_wants_writes(channel_t *chan);
|
||||
|
||||
/* Notify the scheduler of a channel being closed */
|
||||
MOCK_DECL(void,scheduler_release_channel,(channel_t *chan));
|
||||
|
||||
/* Notify scheduler of queue size adjustments */
|
||||
void scheduler_adjust_queue_size(channel_t *chan, char dir, uint64_t adj);
|
||||
|
||||
/* Notify scheduler that a channel's queue position may have changed */
|
||||
void scheduler_touch_channel(channel_t *chan);
|
||||
|
||||
/* Adjust the watermarks from config file*/
|
||||
void scheduler_set_watermarks(uint32_t lo, uint32_t hi, uint32_t max_flush);
|
||||
|
||||
/* Things only scheduler.c and its test suite should see */
|
||||
|
||||
#ifdef SCHEDULER_PRIVATE_
|
||||
MOCK_DECL(STATIC int, scheduler_compare_channels,
|
||||
(const void *c1_v, const void *c2_v));
|
||||
STATIC uint64_t scheduler_get_queue_heuristic(void);
|
||||
STATIC void scheduler_update_queue_heuristic(time_t now);
|
||||
#endif
|
||||
|
||||
#endif /* !defined(TOR_SCHEDULER_H) */
|
||||
|
||||
@ -11,11 +11,12 @@ LIBS = ..\..\..\build-alpha\lib\libevent.lib \
|
||||
ws2_32.lib advapi32.lib shell32.lib \
|
||||
crypt32.lib gdi32.lib user32.lib
|
||||
|
||||
TEST_OBJECTS = test.obj test_addr.obj test_containers.obj \
|
||||
TEST_OBJECTS = test.obj test_addr.obj test_channel.obj test_channeltls.obj \
|
||||
test_containers.obj \
|
||||
test_controller_events.obj test_crypto.obj test_data.obj test_dir.obj \
|
||||
test_checkdir.obj test_microdesc.obj test_pt.obj test_util.obj test_config.obj \
|
||||
test_cell_formats.obj test_replay.obj test_introduce.obj tinytest.obj \
|
||||
test_hs.obj
|
||||
test_cell_formats.obj test_relay.obj test_replay.obj \
|
||||
test_scheduler.obj test_introduce.obj test_hs.obj tinytest.obj
|
||||
|
||||
tinytest.obj: ..\ext\tinytest.c
|
||||
$(CC) $(CFLAGS) /D snprintf=_snprintf /c ..\ext\tinytest.c
|
||||
|
||||
25
src/test/fakechans.h
Normal file
25
src/test/fakechans.h
Normal file
@ -0,0 +1,25 @@
|
||||
/* Copyright (c) 2014, The Tor Project, Inc. */
|
||||
/* See LICENSE for licensing information */
|
||||
|
||||
#ifndef TOR_FAKECHANS_H
|
||||
#define TOR_FAKECHANS_H
|
||||
|
||||
/**
|
||||
* \file fakechans.h
|
||||
* \brief Declarations for fake channels for test suite use
|
||||
*/
|
||||
|
||||
void make_fake_cell(cell_t *c);
|
||||
void make_fake_var_cell(var_cell_t *c);
|
||||
channel_t * new_fake_channel(void);
|
||||
|
||||
/* Also exposes some a mock used by both test_channel.c and test_relay.c */
|
||||
void scheduler_channel_has_waiting_cells_mock(channel_t *ch);
|
||||
void scheduler_release_channel_mock(channel_t *ch);
|
||||
|
||||
/* Query some counters used by the exposed mocks */
|
||||
int get_mock_scheduler_has_waiting_cells_count(void);
|
||||
int get_mock_scheduler_release_channel_count(void);
|
||||
|
||||
#endif /* !defined(TOR_FAKECHANS_H) */
|
||||
|
||||
@ -20,6 +20,8 @@ src_test_test_SOURCES = \
|
||||
src/test/test_addr.c \
|
||||
src/test/test_buffers.c \
|
||||
src/test/test_cell_formats.c \
|
||||
src/test/test_channel.c \
|
||||
src/test/test_channeltls.c \
|
||||
src/test/test_circuitlist.c \
|
||||
src/test/test_circuitmux.c \
|
||||
src/test/test_containers.c \
|
||||
@ -39,8 +41,10 @@ src_test_test_SOURCES = \
|
||||
src/test/test_options.c \
|
||||
src/test/test_pt.c \
|
||||
src/test/test_relaycell.c \
|
||||
src/test/test_relay.c \
|
||||
src/test/test_replay.c \
|
||||
src/test/test_routerkeys.c \
|
||||
src/test/test_scheduler.c \
|
||||
src/test/test_socks.c \
|
||||
src/test/test_util.c \
|
||||
src/test/test_config.c \
|
||||
|
||||
@ -1308,6 +1308,11 @@ extern struct testcase_t accounting_tests[];
|
||||
extern struct testcase_t policy_tests[];
|
||||
extern struct testcase_t status_tests[];
|
||||
extern struct testcase_t routerset_tests[];
|
||||
extern struct testcase_t router_tests[];
|
||||
extern struct testcase_t channel_tests[];
|
||||
extern struct testcase_t channeltls_tests[];
|
||||
extern struct testcase_t relay_tests[];
|
||||
extern struct testcase_t scheduler_tests[];
|
||||
|
||||
static struct testgroup_t testgroups[] = {
|
||||
{ "", test_array },
|
||||
@ -1342,6 +1347,10 @@ static struct testgroup_t testgroups[] = {
|
||||
{ "policy/" , policy_tests },
|
||||
{ "status/" , status_tests },
|
||||
{ "routerset/" , routerset_tests },
|
||||
{ "channel/", channel_tests },
|
||||
{ "channeltls/", channeltls_tests },
|
||||
{ "relay/" , relay_tests },
|
||||
{ "scheduler/", scheduler_tests },
|
||||
END_OF_GROUPS
|
||||
};
|
||||
|
||||
|
||||
1669
src/test/test_channel.c
Normal file
1669
src/test/test_channel.c
Normal file
File diff suppressed because it is too large
Load Diff
332
src/test/test_channeltls.c
Normal file
332
src/test/test_channeltls.c
Normal file
@ -0,0 +1,332 @@
|
||||
/* Copyright (c) 2014, The Tor Project, Inc. */
|
||||
/* See LICENSE for licensing information */
|
||||
|
||||
#include <math.h>
|
||||
|
||||
#define TOR_CHANNEL_INTERNAL_
|
||||
#include "or.h"
|
||||
#include "address.h"
|
||||
#include "buffers.h"
|
||||
#include "channel.h"
|
||||
#include "channeltls.h"
|
||||
#include "connection_or.h"
|
||||
#include "config.h"
|
||||
/* For init/free stuff */
|
||||
#include "scheduler.h"
|
||||
#include "tortls.h"
|
||||
|
||||
/* Test suite stuff */
|
||||
#include "test.h"
|
||||
#include "fakechans.h"
|
||||
|
||||
/* The channeltls unit tests */
|
||||
static void test_channeltls_create(void *arg);
|
||||
static void test_channeltls_num_bytes_queued(void *arg);
|
||||
static void test_channeltls_overhead_estimate(void *arg);
|
||||
|
||||
/* Mocks used by channeltls unit tests */
|
||||
static size_t tlschan_buf_datalen_mock(const buf_t *buf);
|
||||
static or_connection_t * tlschan_connection_or_connect_mock(
|
||||
const tor_addr_t *addr,
|
||||
uint16_t port,
|
||||
const char *digest,
|
||||
channel_tls_t *tlschan);
|
||||
static int tlschan_is_local_addr_mock(const tor_addr_t *addr);
|
||||
|
||||
/* Fake close method */
|
||||
static void tlschan_fake_close_method(channel_t *chan);
|
||||
|
||||
/* Flags controlling behavior of channeltls unit test mocks */
|
||||
static int tlschan_local = 0;
|
||||
static const buf_t * tlschan_buf_datalen_mock_target = NULL;
|
||||
static size_t tlschan_buf_datalen_mock_size = 0;
|
||||
|
||||
/* Thing to cast to fake tor_tls_t * to appease assert_connection_ok() */
|
||||
static int fake_tortls = 0; /* Bleh... */
|
||||
|
||||
static void
|
||||
test_channeltls_create(void *arg)
|
||||
{
|
||||
tor_addr_t test_addr;
|
||||
channel_t *ch = NULL;
|
||||
const char test_digest[DIGEST_LEN] = {
|
||||
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
|
||||
0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14 };
|
||||
|
||||
(void)arg;
|
||||
|
||||
/* Set up a fake address to fake-connect to */
|
||||
test_addr.family = AF_INET;
|
||||
test_addr.addr.in_addr.s_addr = htonl(0x01020304);
|
||||
|
||||
/* For this test we always want the address to be treated as non-local */
|
||||
tlschan_local = 0;
|
||||
/* Install is_local_addr() mock */
|
||||
MOCK(is_local_addr, tlschan_is_local_addr_mock);
|
||||
|
||||
/* Install mock for connection_or_connect() */
|
||||
MOCK(connection_or_connect, tlschan_connection_or_connect_mock);
|
||||
|
||||
/* Try connecting */
|
||||
ch = channel_tls_connect(&test_addr, 567, test_digest);
|
||||
tt_assert(ch != NULL);
|
||||
|
||||
done:
|
||||
if (ch) {
|
||||
MOCK(scheduler_release_channel, scheduler_release_channel_mock);
|
||||
/*
|
||||
* Use fake close method that doesn't try to do too much to fake
|
||||
* orconn
|
||||
*/
|
||||
ch->close = tlschan_fake_close_method;
|
||||
channel_mark_for_close(ch);
|
||||
tor_free(ch);
|
||||
UNMOCK(scheduler_release_channel);
|
||||
}
|
||||
|
||||
UNMOCK(connection_or_connect);
|
||||
UNMOCK(is_local_addr);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static void
|
||||
test_channeltls_num_bytes_queued(void *arg)
|
||||
{
|
||||
tor_addr_t test_addr;
|
||||
channel_t *ch = NULL;
|
||||
const char test_digest[DIGEST_LEN] = {
|
||||
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
|
||||
0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14 };
|
||||
channel_tls_t *tlschan = NULL;
|
||||
size_t len;
|
||||
int fake_outbuf = 0, n;
|
||||
|
||||
(void)arg;
|
||||
|
||||
/* Set up a fake address to fake-connect to */
|
||||
test_addr.family = AF_INET;
|
||||
test_addr.addr.in_addr.s_addr = htonl(0x01020304);
|
||||
|
||||
/* For this test we always want the address to be treated as non-local */
|
||||
tlschan_local = 0;
|
||||
/* Install is_local_addr() mock */
|
||||
MOCK(is_local_addr, tlschan_is_local_addr_mock);
|
||||
|
||||
/* Install mock for connection_or_connect() */
|
||||
MOCK(connection_or_connect, tlschan_connection_or_connect_mock);
|
||||
|
||||
/* Try connecting */
|
||||
ch = channel_tls_connect(&test_addr, 567, test_digest);
|
||||
tt_assert(ch != NULL);
|
||||
|
||||
/*
|
||||
* Next, we have to test ch->num_bytes_queued, which is
|
||||
* channel_tls_num_bytes_queued_method. We can't mock
|
||||
* connection_get_outbuf_len() directly because it's static INLINE
|
||||
* in connection.h, but we can mock buf_datalen(). Note that
|
||||
* if bufferevents ever work, this will break with them enabled.
|
||||
*/
|
||||
|
||||
tt_assert(ch->num_bytes_queued != NULL);
|
||||
tlschan = BASE_CHAN_TO_TLS(ch);
|
||||
tt_assert(tlschan != NULL);
|
||||
if (TO_CONN(tlschan->conn)->outbuf == NULL) {
|
||||
/* We need an outbuf to make sure buf_datalen() gets called */
|
||||
fake_outbuf = 1;
|
||||
TO_CONN(tlschan->conn)->outbuf = buf_new();
|
||||
}
|
||||
tlschan_buf_datalen_mock_target = TO_CONN(tlschan->conn)->outbuf;
|
||||
tlschan_buf_datalen_mock_size = 1024;
|
||||
MOCK(buf_datalen, tlschan_buf_datalen_mock);
|
||||
len = ch->num_bytes_queued(ch);
|
||||
tt_int_op(len, ==, tlschan_buf_datalen_mock_size);
|
||||
/*
|
||||
* We also cover num_cells_writeable here; since wide_circ_ids = 0 on
|
||||
* the fake tlschans, cell_network_size returns 512, and so with
|
||||
* tlschan_buf_datalen_mock_size == 1024, we should be able to write
|
||||
* ceil((OR_CONN_HIGHWATER - 1024) / 512) = ceil(OR_CONN_HIGHWATER / 512)
|
||||
* - 2 cells.
|
||||
*/
|
||||
n = ch->num_cells_writeable(ch);
|
||||
tt_int_op(n, ==, CEIL_DIV(OR_CONN_HIGHWATER, 512) - 2);
|
||||
UNMOCK(buf_datalen);
|
||||
tlschan_buf_datalen_mock_target = NULL;
|
||||
tlschan_buf_datalen_mock_size = 0;
|
||||
if (fake_outbuf) {
|
||||
buf_free(TO_CONN(tlschan->conn)->outbuf);
|
||||
TO_CONN(tlschan->conn)->outbuf = NULL;
|
||||
}
|
||||
|
||||
done:
|
||||
if (ch) {
|
||||
MOCK(scheduler_release_channel, scheduler_release_channel_mock);
|
||||
/*
|
||||
* Use fake close method that doesn't try to do too much to fake
|
||||
* orconn
|
||||
*/
|
||||
ch->close = tlschan_fake_close_method;
|
||||
channel_mark_for_close(ch);
|
||||
tor_free(ch);
|
||||
UNMOCK(scheduler_release_channel);
|
||||
}
|
||||
|
||||
UNMOCK(connection_or_connect);
|
||||
UNMOCK(is_local_addr);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static void
|
||||
test_channeltls_overhead_estimate(void *arg)
|
||||
{
|
||||
tor_addr_t test_addr;
|
||||
channel_t *ch = NULL;
|
||||
const char test_digest[DIGEST_LEN] = {
|
||||
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
|
||||
0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14 };
|
||||
float r;
|
||||
channel_tls_t *tlschan = NULL;
|
||||
|
||||
(void)arg;
|
||||
|
||||
/* Set up a fake address to fake-connect to */
|
||||
test_addr.family = AF_INET;
|
||||
test_addr.addr.in_addr.s_addr = htonl(0x01020304);
|
||||
|
||||
/* For this test we always want the address to be treated as non-local */
|
||||
tlschan_local = 0;
|
||||
/* Install is_local_addr() mock */
|
||||
MOCK(is_local_addr, tlschan_is_local_addr_mock);
|
||||
|
||||
/* Install mock for connection_or_connect() */
|
||||
MOCK(connection_or_connect, tlschan_connection_or_connect_mock);
|
||||
|
||||
/* Try connecting */
|
||||
ch = channel_tls_connect(&test_addr, 567, test_digest);
|
||||
tt_assert(ch != NULL);
|
||||
|
||||
/* First case: silly low ratios should get clamped to 1.0f */
|
||||
tlschan = BASE_CHAN_TO_TLS(ch);
|
||||
tt_assert(tlschan != NULL);
|
||||
tlschan->conn->bytes_xmitted = 128;
|
||||
tlschan->conn->bytes_xmitted_by_tls = 64;
|
||||
r = ch->get_overhead_estimate(ch);
|
||||
tt_assert(fabsf(r - 1.0f) < 1E-12);
|
||||
|
||||
tlschan->conn->bytes_xmitted_by_tls = 127;
|
||||
r = ch->get_overhead_estimate(ch);
|
||||
tt_assert(fabsf(r - 1.0f) < 1E-12);
|
||||
|
||||
/* Now middle of the range */
|
||||
tlschan->conn->bytes_xmitted_by_tls = 192;
|
||||
r = ch->get_overhead_estimate(ch);
|
||||
tt_assert(fabsf(r - 1.5f) < 1E-12);
|
||||
|
||||
/* Now above the 2.0f clamp */
|
||||
tlschan->conn->bytes_xmitted_by_tls = 257;
|
||||
r = ch->get_overhead_estimate(ch);
|
||||
tt_assert(fabsf(r - 2.0f) < 1E-12);
|
||||
|
||||
tlschan->conn->bytes_xmitted_by_tls = 512;
|
||||
r = ch->get_overhead_estimate(ch);
|
||||
tt_assert(fabsf(r - 2.0f) < 1E-12);
|
||||
|
||||
done:
|
||||
if (ch) {
|
||||
MOCK(scheduler_release_channel, scheduler_release_channel_mock);
|
||||
/*
|
||||
* Use fake close method that doesn't try to do too much to fake
|
||||
* orconn
|
||||
*/
|
||||
ch->close = tlschan_fake_close_method;
|
||||
channel_mark_for_close(ch);
|
||||
tor_free(ch);
|
||||
UNMOCK(scheduler_release_channel);
|
||||
}
|
||||
|
||||
UNMOCK(connection_or_connect);
|
||||
UNMOCK(is_local_addr);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static size_t
|
||||
tlschan_buf_datalen_mock(const buf_t *buf)
|
||||
{
|
||||
if (buf != NULL && buf == tlschan_buf_datalen_mock_target) {
|
||||
return tlschan_buf_datalen_mock_size;
|
||||
} else {
|
||||
return buf_datalen__real(buf);
|
||||
}
|
||||
}
|
||||
|
||||
static or_connection_t *
|
||||
tlschan_connection_or_connect_mock(const tor_addr_t *addr,
|
||||
uint16_t port,
|
||||
const char *digest,
|
||||
channel_tls_t *tlschan)
|
||||
{
|
||||
or_connection_t *result = NULL;
|
||||
|
||||
tt_assert(addr != NULL);
|
||||
tt_assert(port != 0);
|
||||
tt_assert(digest != NULL);
|
||||
tt_assert(tlschan != NULL);
|
||||
|
||||
/* Make a fake orconn */
|
||||
result = tor_malloc_zero(sizeof(*result));
|
||||
result->base_.magic = OR_CONNECTION_MAGIC;
|
||||
result->base_.state = OR_CONN_STATE_OPEN;
|
||||
result->base_.type = CONN_TYPE_OR;
|
||||
result->base_.socket_family = addr->family;
|
||||
result->base_.address = tor_strdup("<fake>");
|
||||
memcpy(&(result->base_.addr), addr, sizeof(tor_addr_t));
|
||||
result->base_.port = port;
|
||||
memcpy(result->identity_digest, digest, DIGEST_LEN);
|
||||
result->chan = tlschan;
|
||||
memcpy(&(result->real_addr), addr, sizeof(tor_addr_t));
|
||||
result->tls = (tor_tls_t *)((void *)(&fake_tortls));
|
||||
|
||||
done:
|
||||
return result;
|
||||
}
|
||||
|
||||
static void
|
||||
tlschan_fake_close_method(channel_t *chan)
|
||||
{
|
||||
channel_tls_t *tlschan = NULL;
|
||||
|
||||
tt_assert(chan != NULL);
|
||||
tt_int_op(chan->magic, ==, TLS_CHAN_MAGIC);
|
||||
|
||||
tlschan = BASE_CHAN_TO_TLS(chan);
|
||||
tt_assert(tlschan != NULL);
|
||||
|
||||
/* Just free the fake orconn */
|
||||
tor_free(tlschan->conn);
|
||||
|
||||
channel_closed(chan);
|
||||
|
||||
done:
|
||||
return;
|
||||
}
|
||||
|
||||
static int
|
||||
tlschan_is_local_addr_mock(const tor_addr_t *addr)
|
||||
{
|
||||
tt_assert(addr != NULL);
|
||||
|
||||
done:
|
||||
return tlschan_local;
|
||||
}
|
||||
|
||||
struct testcase_t channeltls_tests[] = {
|
||||
{ "create", test_channeltls_create, TT_FORK, NULL, NULL },
|
||||
{ "num_bytes_queued", test_channeltls_num_bytes_queued,
|
||||
TT_FORK, NULL, NULL },
|
||||
{ "overhead_estimate", test_channeltls_overhead_estimate,
|
||||
TT_FORK, NULL, NULL },
|
||||
END_OF_TESTCASES
|
||||
};
|
||||
|
||||
@ -8,6 +8,7 @@
|
||||
#include "channel.h"
|
||||
#include "circuitmux.h"
|
||||
#include "relay.h"
|
||||
#include "scheduler.h"
|
||||
#include "test.h"
|
||||
|
||||
/* XXXX duplicated function from test_circuitlist.c */
|
||||
@ -36,6 +37,8 @@ test_cmux_destroy_cell_queue(void *arg)
|
||||
cell_queue_t *cq = NULL;
|
||||
packed_cell_t *pc = NULL;
|
||||
|
||||
scheduler_init();
|
||||
|
||||
#ifdef ENABLE_MEMPOOLS
|
||||
init_cell_pool();
|
||||
#endif /* ENABLE_MEMPOOLS */
|
||||
|
||||
134
src/test/test_relay.c
Normal file
134
src/test/test_relay.c
Normal file
@ -0,0 +1,134 @@
|
||||
/* Copyright (c) 2014, The Tor Project, Inc. */
|
||||
/* See LICENSE for licensing information */
|
||||
|
||||
#include "or.h"
|
||||
#define CIRCUITBUILD_PRIVATE
|
||||
#include "circuitbuild.h"
|
||||
#define RELAY_PRIVATE
|
||||
#include "relay.h"
|
||||
/* For init/free stuff */
|
||||
#include "scheduler.h"
|
||||
|
||||
/* Test suite stuff */
|
||||
#include "test.h"
|
||||
#include "fakechans.h"
|
||||
|
||||
static or_circuit_t * new_fake_orcirc(channel_t *nchan, channel_t *pchan);
|
||||
|
||||
static void test_relay_append_cell_to_circuit_queue(void *arg);
|
||||
|
||||
static or_circuit_t *
|
||||
new_fake_orcirc(channel_t *nchan, channel_t *pchan)
|
||||
{
|
||||
or_circuit_t *orcirc = NULL;
|
||||
circuit_t *circ = NULL;
|
||||
|
||||
orcirc = tor_malloc_zero(sizeof(*orcirc));
|
||||
circ = &(orcirc->base_);
|
||||
circ->magic = OR_CIRCUIT_MAGIC;
|
||||
|
||||
circ->n_chan = nchan;
|
||||
circ->n_circ_id = get_unique_circ_id_by_chan(nchan);
|
||||
circ->n_mux = NULL; /* ?? */
|
||||
cell_queue_init(&(circ->n_chan_cells));
|
||||
circ->n_hop = NULL;
|
||||
circ->streams_blocked_on_n_chan = 0;
|
||||
circ->streams_blocked_on_p_chan = 0;
|
||||
circ->n_delete_pending = 0;
|
||||
circ->p_delete_pending = 0;
|
||||
circ->received_destroy = 0;
|
||||
circ->state = CIRCUIT_STATE_OPEN;
|
||||
circ->purpose = CIRCUIT_PURPOSE_OR;
|
||||
circ->package_window = CIRCWINDOW_START_MAX;
|
||||
circ->deliver_window = CIRCWINDOW_START_MAX;
|
||||
circ->n_chan_create_cell = NULL;
|
||||
|
||||
orcirc->p_chan = pchan;
|
||||
orcirc->p_circ_id = get_unique_circ_id_by_chan(pchan);
|
||||
cell_queue_init(&(orcirc->p_chan_cells));
|
||||
|
||||
return orcirc;
|
||||
}
|
||||
|
||||
static void
|
||||
test_relay_append_cell_to_circuit_queue(void *arg)
|
||||
{
|
||||
channel_t *nchan = NULL, *pchan = NULL;
|
||||
or_circuit_t *orcirc = NULL;
|
||||
cell_t *cell = NULL;
|
||||
int old_count, new_count;
|
||||
|
||||
(void)arg;
|
||||
|
||||
/* We'll need the cell pool for append_cell_to_circuit_queue() to work */
|
||||
#ifdef ENABLE_MEMPOOLS
|
||||
init_cell_pool();
|
||||
#endif /* ENABLE_MEMPOOLS */
|
||||
|
||||
/* Make fake channels to be nchan and pchan for the circuit */
|
||||
nchan = new_fake_channel();
|
||||
tt_assert(nchan);
|
||||
|
||||
pchan = new_fake_channel();
|
||||
tt_assert(pchan);
|
||||
|
||||
/* We'll need chans with working cmuxes */
|
||||
nchan->cmux = circuitmux_alloc();
|
||||
pchan->cmux = circuitmux_alloc();
|
||||
|
||||
/* Make a fake orcirc */
|
||||
orcirc = new_fake_orcirc(nchan, pchan);
|
||||
tt_assert(orcirc);
|
||||
|
||||
/* Make a cell */
|
||||
cell = tor_malloc_zero(sizeof(cell_t));
|
||||
make_fake_cell(cell);
|
||||
|
||||
MOCK(scheduler_channel_has_waiting_cells,
|
||||
scheduler_channel_has_waiting_cells_mock);
|
||||
|
||||
/* Append it */
|
||||
old_count = get_mock_scheduler_has_waiting_cells_count();
|
||||
append_cell_to_circuit_queue(TO_CIRCUIT(orcirc), nchan, cell,
|
||||
CELL_DIRECTION_OUT, 0);
|
||||
new_count = get_mock_scheduler_has_waiting_cells_count();
|
||||
tt_int_op(new_count, ==, old_count + 1);
|
||||
|
||||
/* Now try the reverse direction */
|
||||
old_count = get_mock_scheduler_has_waiting_cells_count();
|
||||
append_cell_to_circuit_queue(TO_CIRCUIT(orcirc), pchan, cell,
|
||||
CELL_DIRECTION_IN, 0);
|
||||
new_count = get_mock_scheduler_has_waiting_cells_count();
|
||||
tt_int_op(new_count, ==, old_count + 1);
|
||||
|
||||
UNMOCK(scheduler_channel_has_waiting_cells);
|
||||
|
||||
/* Get rid of the fake channels */
|
||||
MOCK(scheduler_release_channel, scheduler_release_channel_mock);
|
||||
channel_mark_for_close(nchan);
|
||||
channel_mark_for_close(pchan);
|
||||
UNMOCK(scheduler_release_channel);
|
||||
|
||||
/* Shut down channels */
|
||||
channel_free_all();
|
||||
nchan = pchan = NULL;
|
||||
|
||||
done:
|
||||
tor_free(orcirc);
|
||||
if (nchan && nchan->cmux) circuitmux_free(nchan->cmux);
|
||||
tor_free(nchan);
|
||||
if (pchan && pchan->cmux) circuitmux_free(pchan->cmux);
|
||||
tor_free(pchan);
|
||||
#ifdef ENABLE_MEMPOOLS
|
||||
free_cell_pool();
|
||||
#endif /* ENABLE_MEMPOOLS */
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
struct testcase_t relay_tests[] = {
|
||||
{ "append_cell_to_circuit_queue", test_relay_append_cell_to_circuit_queue,
|
||||
TT_FORK, NULL, NULL },
|
||||
END_OF_TESTCASES
|
||||
};
|
||||
|
||||
763
src/test/test_scheduler.c
Normal file
763
src/test/test_scheduler.c
Normal file
@ -0,0 +1,763 @@
|
||||
/* Copyright (c) 2014, The Tor Project, Inc. */
|
||||
/* See LICENSE for licensing information */
|
||||
|
||||
#include <math.h>
|
||||
|
||||
#include "orconfig.h"
|
||||
|
||||
/* Libevent stuff */
|
||||
#ifdef HAVE_EVENT2_EVENT_H
|
||||
#include <event2/event.h>
|
||||
#else
|
||||
#include <event.h>
|
||||
#endif
|
||||
|
||||
#define TOR_CHANNEL_INTERNAL_
|
||||
#define CHANNEL_PRIVATE_
|
||||
#include "or.h"
|
||||
#include "compat_libevent.h"
|
||||
#include "channel.h"
|
||||
#define SCHEDULER_PRIVATE_
|
||||
#include "scheduler.h"
|
||||
|
||||
/* Test suite stuff */
|
||||
#include "test.h"
|
||||
#include "fakechans.h"
|
||||
|
||||
/* Statics in scheduler.c exposed to the test suite */
|
||||
extern smartlist_t *channels_pending;
|
||||
extern struct event *run_sched_ev;
|
||||
extern uint64_t queue_heuristic;
|
||||
extern time_t queue_heuristic_timestamp;
|
||||
|
||||
/* Event base for scheduelr tests */
|
||||
static struct event_base *mock_event_base = NULL;
|
||||
|
||||
/* Statics controlling mocks */
|
||||
static circuitmux_t *mock_ccm_tgt_1 = NULL;
|
||||
static circuitmux_t *mock_ccm_tgt_2 = NULL;
|
||||
|
||||
static circuitmux_t *mock_cgp_tgt_1 = NULL;
|
||||
static const circuitmux_policy_t *mock_cgp_val_1 = NULL;
|
||||
static circuitmux_t *mock_cgp_tgt_2 = NULL;
|
||||
static const circuitmux_policy_t *mock_cgp_val_2 = NULL;
|
||||
static int scheduler_compare_channels_mock_ctr = 0;
|
||||
static int scheduler_run_mock_ctr = 0;
|
||||
|
||||
static void channel_flush_some_cells_mock_free_all(void);
|
||||
static void channel_flush_some_cells_mock_set(channel_t *chan,
|
||||
ssize_t num_cells);
|
||||
|
||||
/* Setup for mock event stuff */
|
||||
static void mock_event_free_all(void);
|
||||
static void mock_event_init(void);
|
||||
|
||||
/* Mocks used by scheduler tests */
|
||||
static ssize_t channel_flush_some_cells_mock(channel_t *chan,
|
||||
ssize_t num_cells);
|
||||
static int circuitmux_compare_muxes_mock(circuitmux_t *cmux_1,
|
||||
circuitmux_t *cmux_2);
|
||||
static const circuitmux_policy_t * circuitmux_get_policy_mock(
|
||||
circuitmux_t *cmux);
|
||||
static int scheduler_compare_channels_mock(const void *c1_v,
|
||||
const void *c2_v);
|
||||
static void scheduler_run_noop_mock(void);
|
||||
static struct event_base * tor_libevent_get_base_mock(void);
|
||||
|
||||
/* Scheduler test cases */
|
||||
static void test_scheduler_channel_states(void *arg);
|
||||
static void test_scheduler_compare_channels(void *arg);
|
||||
static void test_scheduler_initfree(void *arg);
|
||||
static void test_scheduler_loop(void *arg);
|
||||
static void test_scheduler_queue_heuristic(void *arg);
|
||||
|
||||
/* Mock event init/free */
|
||||
|
||||
/* Shamelessly stolen from compat_libevent.c */
|
||||
#define V(major, minor, patch) \
|
||||
(((major) << 24) | ((minor) << 16) | ((patch) << 8))
|
||||
|
||||
static void
|
||||
mock_event_free_all(void)
|
||||
{
|
||||
tt_assert(mock_event_base != NULL);
|
||||
|
||||
if (mock_event_base) {
|
||||
event_base_free(mock_event_base);
|
||||
mock_event_base = NULL;
|
||||
}
|
||||
|
||||
tt_ptr_op(mock_event_base, ==, NULL);
|
||||
|
||||
done:
|
||||
return;
|
||||
}
|
||||
|
||||
static void
|
||||
mock_event_init(void)
|
||||
{
|
||||
#ifdef HAVE_EVENT2_EVENT_H
|
||||
struct event_config *cfg = NULL;
|
||||
#endif
|
||||
|
||||
tt_ptr_op(mock_event_base, ==, NULL);
|
||||
|
||||
/*
|
||||
* Really cut down from tor_libevent_initialize of
|
||||
* src/common/compat_libevent.c to kill config dependencies
|
||||
*/
|
||||
|
||||
if (!mock_event_base) {
|
||||
#ifdef HAVE_EVENT2_EVENT_H
|
||||
cfg = event_config_new();
|
||||
#if LIBEVENT_VERSION_NUMBER >= V(2,0,9)
|
||||
/* We can enable changelist support with epoll, since we don't give
|
||||
* Libevent any dup'd fds. This lets us avoid some syscalls. */
|
||||
event_config_set_flag(cfg, EVENT_BASE_FLAG_EPOLL_USE_CHANGELIST);
|
||||
#endif
|
||||
mock_event_base = event_base_new_with_config(cfg);
|
||||
event_config_free(cfg);
|
||||
#else
|
||||
mock_event_base = event_init();
|
||||
#endif
|
||||
}
|
||||
|
||||
tt_assert(mock_event_base != NULL);
|
||||
|
||||
done:
|
||||
return;
|
||||
}
|
||||
|
||||
/* Mocks */
|
||||
|
||||
typedef struct {
|
||||
const channel_t *chan;
|
||||
ssize_t cells;
|
||||
} flush_mock_channel_t;
|
||||
|
||||
static smartlist_t *chans_for_flush_mock = NULL;
|
||||
|
||||
static void
|
||||
channel_flush_some_cells_mock_free_all(void)
|
||||
{
|
||||
if (chans_for_flush_mock) {
|
||||
SMARTLIST_FOREACH_BEGIN(chans_for_flush_mock,
|
||||
flush_mock_channel_t *,
|
||||
flush_mock_ch) {
|
||||
SMARTLIST_DEL_CURRENT(chans_for_flush_mock, flush_mock_ch);
|
||||
tor_free(flush_mock_ch);
|
||||
} SMARTLIST_FOREACH_END(flush_mock_ch);
|
||||
|
||||
smartlist_free(chans_for_flush_mock);
|
||||
chans_for_flush_mock = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
channel_flush_some_cells_mock_set(channel_t *chan, ssize_t num_cells)
|
||||
{
|
||||
flush_mock_channel_t *flush_mock_ch = NULL;
|
||||
|
||||
if (!chan) return;
|
||||
if (num_cells <= 0) return;
|
||||
|
||||
if (!chans_for_flush_mock) {
|
||||
chans_for_flush_mock = smartlist_new();
|
||||
}
|
||||
|
||||
SMARTLIST_FOREACH_BEGIN(chans_for_flush_mock,
|
||||
flush_mock_channel_t *,
|
||||
flush_mock_ch) {
|
||||
if (flush_mock_ch != NULL && flush_mock_ch->chan != NULL) {
|
||||
if (flush_mock_ch->chan == chan) {
|
||||
/* Found it */
|
||||
flush_mock_ch->cells = num_cells;
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
/* That shouldn't be there... */
|
||||
SMARTLIST_DEL_CURRENT(chans_for_flush_mock, flush_mock_ch);
|
||||
tor_free(flush_mock_ch);
|
||||
}
|
||||
} SMARTLIST_FOREACH_END(flush_mock_ch);
|
||||
|
||||
if (!flush_mock_ch) {
|
||||
/* The loop didn't find it */
|
||||
flush_mock_ch = tor_malloc_zero(sizeof(*flush_mock_ch));
|
||||
flush_mock_ch->chan = chan;
|
||||
flush_mock_ch->cells = num_cells;
|
||||
smartlist_add(chans_for_flush_mock, flush_mock_ch);
|
||||
}
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
channel_flush_some_cells_mock(channel_t *chan, ssize_t num_cells)
|
||||
{
|
||||
ssize_t flushed = 0, max;
|
||||
char unlimited = 0;
|
||||
flush_mock_channel_t *found = NULL;
|
||||
|
||||
tt_assert(chan != NULL);
|
||||
if (chan) {
|
||||
if (num_cells < 0) {
|
||||
num_cells = 0;
|
||||
unlimited = 1;
|
||||
}
|
||||
|
||||
/* Check if we have it */
|
||||
if (chans_for_flush_mock != NULL) {
|
||||
SMARTLIST_FOREACH_BEGIN(chans_for_flush_mock,
|
||||
flush_mock_channel_t *,
|
||||
flush_mock_ch) {
|
||||
if (flush_mock_ch != NULL && flush_mock_ch->chan != NULL) {
|
||||
if (flush_mock_ch->chan == chan) {
|
||||
/* Found it */
|
||||
found = flush_mock_ch;
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
/* That shouldn't be there... */
|
||||
SMARTLIST_DEL_CURRENT(chans_for_flush_mock, flush_mock_ch);
|
||||
tor_free(flush_mock_ch);
|
||||
}
|
||||
} SMARTLIST_FOREACH_END(flush_mock_ch);
|
||||
|
||||
if (found) {
|
||||
/* We found one */
|
||||
if (found->cells < 0) found->cells = 0;
|
||||
|
||||
if (unlimited) max = found->cells;
|
||||
else max = MIN(found->cells, num_cells);
|
||||
|
||||
flushed += max;
|
||||
found->cells -= max;
|
||||
|
||||
if (found->cells <= 0) {
|
||||
smartlist_remove(chans_for_flush_mock, found);
|
||||
tor_free(found);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
done:
|
||||
return flushed;
|
||||
}
|
||||
|
||||
static int
|
||||
circuitmux_compare_muxes_mock(circuitmux_t *cmux_1,
|
||||
circuitmux_t *cmux_2)
|
||||
{
|
||||
int result = 0;
|
||||
|
||||
tt_assert(cmux_1 != NULL);
|
||||
tt_assert(cmux_2 != NULL);
|
||||
|
||||
if (cmux_1 != cmux_2) {
|
||||
if (cmux_1 == mock_ccm_tgt_1 && cmux_2 == mock_ccm_tgt_2) result = -1;
|
||||
else if (cmux_1 == mock_ccm_tgt_2 && cmux_2 == mock_ccm_tgt_1) {
|
||||
result = 1;
|
||||
} else {
|
||||
if (cmux_1 == mock_ccm_tgt_1 || cmux_1 == mock_ccm_tgt_1) result = -1;
|
||||
else if (cmux_2 == mock_ccm_tgt_1 || cmux_2 == mock_ccm_tgt_2) {
|
||||
result = 1;
|
||||
} else {
|
||||
result = circuitmux_compare_muxes__real(cmux_1, cmux_2);
|
||||
}
|
||||
}
|
||||
}
|
||||
/* else result = 0 always */
|
||||
|
||||
done:
|
||||
return result;
|
||||
}
|
||||
|
||||
static const circuitmux_policy_t *
|
||||
circuitmux_get_policy_mock(circuitmux_t *cmux)
|
||||
{
|
||||
const circuitmux_policy_t *result = NULL;
|
||||
|
||||
tt_assert(cmux != NULL);
|
||||
if (cmux) {
|
||||
if (cmux == mock_cgp_tgt_1) result = mock_cgp_val_1;
|
||||
else if (cmux == mock_cgp_tgt_2) result = mock_cgp_val_2;
|
||||
else result = circuitmux_get_policy__real(cmux);
|
||||
}
|
||||
|
||||
done:
|
||||
return result;
|
||||
}
|
||||
|
||||
static int
|
||||
scheduler_compare_channels_mock(const void *c1_v,
|
||||
const void *c2_v)
|
||||
{
|
||||
uintptr_t p1, p2;
|
||||
|
||||
p1 = (uintptr_t)(c1_v);
|
||||
p2 = (uintptr_t)(c2_v);
|
||||
|
||||
++scheduler_compare_channels_mock_ctr;
|
||||
|
||||
if (p1 == p2) return 0;
|
||||
else if (p1 < p2) return 1;
|
||||
else return -1;
|
||||
}
|
||||
|
||||
static void
|
||||
scheduler_run_noop_mock(void)
|
||||
{
|
||||
++scheduler_run_mock_ctr;
|
||||
}
|
||||
|
||||
static struct event_base *
|
||||
tor_libevent_get_base_mock(void)
|
||||
{
|
||||
return mock_event_base;
|
||||
}
|
||||
|
||||
/* Test cases */
|
||||
|
||||
static void
|
||||
test_scheduler_channel_states(void *arg)
|
||||
{
|
||||
channel_t *ch1 = NULL, *ch2 = NULL;
|
||||
int old_count;
|
||||
|
||||
(void)arg;
|
||||
|
||||
/* Set up libevent and scheduler */
|
||||
|
||||
mock_event_init();
|
||||
MOCK(tor_libevent_get_base, tor_libevent_get_base_mock);
|
||||
scheduler_init();
|
||||
/*
|
||||
* Install the compare channels mock so we can test
|
||||
* scheduler_touch_channel().
|
||||
*/
|
||||
MOCK(scheduler_compare_channels, scheduler_compare_channels_mock);
|
||||
/*
|
||||
* Disable scheduler_run so we can just check the state transitions
|
||||
* without having to make everything it might call work too.
|
||||
*/
|
||||
MOCK(scheduler_run, scheduler_run_noop_mock);
|
||||
|
||||
tt_int_op(smartlist_len(channels_pending), ==, 0);
|
||||
|
||||
/* Set up a fake channel */
|
||||
ch1 = new_fake_channel();
|
||||
tt_assert(ch1);
|
||||
|
||||
/* Start it off in OPENING */
|
||||
ch1->state = CHANNEL_STATE_OPENING;
|
||||
/* We'll need a cmux */
|
||||
ch1->cmux = circuitmux_alloc();
|
||||
/* Try to register it */
|
||||
channel_register(ch1);
|
||||
tt_assert(ch1->registered);
|
||||
|
||||
/* It should start off in SCHED_CHAN_IDLE */
|
||||
tt_int_op(ch1->scheduler_state, ==, SCHED_CHAN_IDLE);
|
||||
|
||||
/* Now get another one */
|
||||
ch2 = new_fake_channel();
|
||||
tt_assert(ch2);
|
||||
ch2->state = CHANNEL_STATE_OPENING;
|
||||
ch2->cmux = circuitmux_alloc();
|
||||
channel_register(ch2);
|
||||
tt_assert(ch2->registered);
|
||||
|
||||
/* Send it to SCHED_CHAN_WAITING_TO_WRITE */
|
||||
scheduler_channel_has_waiting_cells(ch1);
|
||||
tt_int_op(ch1->scheduler_state, ==, SCHED_CHAN_WAITING_TO_WRITE);
|
||||
|
||||
/* This should send it to SCHED_CHAN_PENDING */
|
||||
scheduler_channel_wants_writes(ch1);
|
||||
tt_int_op(ch1->scheduler_state, ==, SCHED_CHAN_PENDING);
|
||||
tt_int_op(smartlist_len(channels_pending), ==, 1);
|
||||
|
||||
/* Now send ch2 to SCHED_CHAN_WAITING_FOR_CELLS */
|
||||
scheduler_channel_wants_writes(ch2);
|
||||
tt_int_op(ch2->scheduler_state, ==, SCHED_CHAN_WAITING_FOR_CELLS);
|
||||
|
||||
/* Drop ch2 back to idle */
|
||||
scheduler_channel_doesnt_want_writes(ch2);
|
||||
tt_int_op(ch2->scheduler_state, ==, SCHED_CHAN_IDLE);
|
||||
|
||||
/* ...and back to SCHED_CHAN_WAITING_FOR_CELLS */
|
||||
scheduler_channel_wants_writes(ch2);
|
||||
tt_int_op(ch2->scheduler_state, ==, SCHED_CHAN_WAITING_FOR_CELLS);
|
||||
|
||||
/* ...and this should kick ch2 into SCHED_CHAN_PENDING */
|
||||
scheduler_channel_has_waiting_cells(ch2);
|
||||
tt_int_op(ch2->scheduler_state, ==, SCHED_CHAN_PENDING);
|
||||
tt_int_op(smartlist_len(channels_pending), ==, 2);
|
||||
|
||||
/* This should send ch2 to SCHED_CHAN_WAITING_TO_WRITE */
|
||||
scheduler_channel_doesnt_want_writes(ch2);
|
||||
tt_int_op(ch2->scheduler_state, ==, SCHED_CHAN_WAITING_TO_WRITE);
|
||||
tt_int_op(smartlist_len(channels_pending), ==, 1);
|
||||
|
||||
/* ...and back to SCHED_CHAN_PENDING */
|
||||
scheduler_channel_wants_writes(ch2);
|
||||
tt_int_op(ch2->scheduler_state, ==, SCHED_CHAN_PENDING);
|
||||
tt_int_op(smartlist_len(channels_pending), ==, 2);
|
||||
|
||||
/* Now we exercise scheduler_touch_channel */
|
||||
old_count = scheduler_compare_channels_mock_ctr;
|
||||
scheduler_touch_channel(ch1);
|
||||
tt_assert(scheduler_compare_channels_mock_ctr > old_count);
|
||||
|
||||
/* Close */
|
||||
channel_mark_for_close(ch1);
|
||||
tt_int_op(ch1->state, ==, CHANNEL_STATE_CLOSING);
|
||||
channel_mark_for_close(ch2);
|
||||
tt_int_op(ch2->state, ==, CHANNEL_STATE_CLOSING);
|
||||
channel_closed(ch1);
|
||||
tt_int_op(ch1->state, ==, CHANNEL_STATE_CLOSED);
|
||||
ch1 = NULL;
|
||||
channel_closed(ch2);
|
||||
tt_int_op(ch2->state, ==, CHANNEL_STATE_CLOSED);
|
||||
ch2 = NULL;
|
||||
|
||||
/* Shut things down */
|
||||
|
||||
channel_free_all();
|
||||
scheduler_free_all();
|
||||
mock_event_free_all();
|
||||
|
||||
done:
|
||||
tor_free(ch1);
|
||||
tor_free(ch2);
|
||||
|
||||
UNMOCK(scheduler_compare_channels);
|
||||
UNMOCK(scheduler_run);
|
||||
UNMOCK(tor_libevent_get_base);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static void
|
||||
test_scheduler_compare_channels(void *arg)
|
||||
{
|
||||
/* We don't actually need whole fake channels... */
|
||||
channel_t c1, c2;
|
||||
/* ...and some dummy circuitmuxes too */
|
||||
circuitmux_t *cm1 = NULL, *cm2 = NULL;
|
||||
int result;
|
||||
|
||||
(void)arg;
|
||||
|
||||
/* We can't actually see sizeof(circuitmux_t) from here */
|
||||
cm1 = tor_malloc_zero(sizeof(void *));
|
||||
cm2 = tor_malloc_zero(sizeof(void *));
|
||||
|
||||
c1.cmux = cm1;
|
||||
c2.cmux = cm2;
|
||||
|
||||
/* Configure circuitmux_get_policy() mock */
|
||||
mock_cgp_tgt_1 = cm1;
|
||||
/*
|
||||
* This is to test the different-policies case, which uses the policy
|
||||
* cast to an intptr_t as an arbitrary but definite thing to compare.
|
||||
*/
|
||||
mock_cgp_val_1 = (const circuitmux_policy_t *)(1);
|
||||
mock_cgp_tgt_2 = cm2;
|
||||
mock_cgp_val_2 = (const circuitmux_policy_t *)(2);
|
||||
|
||||
MOCK(circuitmux_get_policy, circuitmux_get_policy_mock);
|
||||
|
||||
/* Now set up circuitmux_compare_muxes() mock using cm1/cm2 */
|
||||
mock_ccm_tgt_1 = cm1;
|
||||
mock_ccm_tgt_2 = cm2;
|
||||
MOCK(circuitmux_compare_muxes, circuitmux_compare_muxes_mock);
|
||||
|
||||
/* Equal-channel case */
|
||||
result = scheduler_compare_channels(&c1, &c1);
|
||||
tt_int_op(result, ==, 0);
|
||||
|
||||
/* Distinct channels, distinct policies */
|
||||
result = scheduler_compare_channels(&c1, &c2);
|
||||
tt_int_op(result, ==, -1);
|
||||
result = scheduler_compare_channels(&c2, &c1);
|
||||
tt_int_op(result, ==, 1);
|
||||
|
||||
/* Distinct channels, same policy */
|
||||
mock_cgp_val_2 = mock_cgp_val_1;
|
||||
result = scheduler_compare_channels(&c1, &c2);
|
||||
tt_int_op(result, ==, -1);
|
||||
result = scheduler_compare_channels(&c2, &c1);
|
||||
tt_int_op(result, ==, 1);
|
||||
|
||||
done:
|
||||
|
||||
UNMOCK(circuitmux_compare_muxes);
|
||||
mock_ccm_tgt_1 = NULL;
|
||||
mock_ccm_tgt_2 = NULL;
|
||||
|
||||
UNMOCK(circuitmux_get_policy);
|
||||
mock_cgp_tgt_1 = NULL;
|
||||
mock_cgp_val_1 = NULL;
|
||||
mock_cgp_tgt_2 = NULL;
|
||||
mock_cgp_val_2 = NULL;
|
||||
|
||||
tor_free(cm1);
|
||||
tor_free(cm2);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static void
|
||||
test_scheduler_initfree(void *arg)
|
||||
{
|
||||
(void)arg;
|
||||
|
||||
tt_ptr_op(channels_pending, ==, NULL);
|
||||
tt_ptr_op(run_sched_ev, ==, NULL);
|
||||
|
||||
mock_event_init();
|
||||
MOCK(tor_libevent_get_base, tor_libevent_get_base_mock);
|
||||
|
||||
scheduler_init();
|
||||
|
||||
tt_assert(channels_pending != NULL);
|
||||
tt_assert(run_sched_ev != NULL);
|
||||
|
||||
scheduler_free_all();
|
||||
|
||||
UNMOCK(tor_libevent_get_base);
|
||||
mock_event_free_all();
|
||||
|
||||
tt_ptr_op(channels_pending, ==, NULL);
|
||||
tt_ptr_op(run_sched_ev, ==, NULL);
|
||||
|
||||
done:
|
||||
return;
|
||||
}
|
||||
|
||||
static void
|
||||
test_scheduler_loop(void *arg)
|
||||
{
|
||||
channel_t *ch1 = NULL, *ch2 = NULL;
|
||||
|
||||
(void)arg;
|
||||
|
||||
/* Set up libevent and scheduler */
|
||||
|
||||
mock_event_init();
|
||||
MOCK(tor_libevent_get_base, tor_libevent_get_base_mock);
|
||||
scheduler_init();
|
||||
/*
|
||||
* Install the compare channels mock so we can test
|
||||
* scheduler_touch_channel().
|
||||
*/
|
||||
MOCK(scheduler_compare_channels, scheduler_compare_channels_mock);
|
||||
/*
|
||||
* Disable scheduler_run so we can just check the state transitions
|
||||
* without having to make everything it might call work too.
|
||||
*/
|
||||
MOCK(scheduler_run, scheduler_run_noop_mock);
|
||||
|
||||
tt_int_op(smartlist_len(channels_pending), ==, 0);
|
||||
|
||||
/* Set up a fake channel */
|
||||
ch1 = new_fake_channel();
|
||||
tt_assert(ch1);
|
||||
|
||||
/* Start it off in OPENING */
|
||||
ch1->state = CHANNEL_STATE_OPENING;
|
||||
/* We'll need a cmux */
|
||||
ch1->cmux = circuitmux_alloc();
|
||||
/* Try to register it */
|
||||
channel_register(ch1);
|
||||
tt_assert(ch1->registered);
|
||||
/* Finish opening it */
|
||||
channel_change_state(ch1, CHANNEL_STATE_OPEN);
|
||||
|
||||
/* It should start off in SCHED_CHAN_IDLE */
|
||||
tt_int_op(ch1->scheduler_state, ==, SCHED_CHAN_IDLE);
|
||||
|
||||
/* Now get another one */
|
||||
ch2 = new_fake_channel();
|
||||
tt_assert(ch2);
|
||||
ch2->state = CHANNEL_STATE_OPENING;
|
||||
ch2->cmux = circuitmux_alloc();
|
||||
channel_register(ch2);
|
||||
tt_assert(ch2->registered);
|
||||
/*
|
||||
* Don't open ch2; then channel_num_cells_writeable() will return
|
||||
* zero and we'll get coverage of that exception case in scheduler_run()
|
||||
*/
|
||||
|
||||
tt_int_op(ch1->state, ==, CHANNEL_STATE_OPEN);
|
||||
tt_int_op(ch2->state, ==, CHANNEL_STATE_OPENING);
|
||||
|
||||
/* Send it to SCHED_CHAN_WAITING_TO_WRITE */
|
||||
scheduler_channel_has_waiting_cells(ch1);
|
||||
tt_int_op(ch1->scheduler_state, ==, SCHED_CHAN_WAITING_TO_WRITE);
|
||||
|
||||
/* This should send it to SCHED_CHAN_PENDING */
|
||||
scheduler_channel_wants_writes(ch1);
|
||||
tt_int_op(ch1->scheduler_state, ==, SCHED_CHAN_PENDING);
|
||||
tt_int_op(smartlist_len(channels_pending), ==, 1);
|
||||
|
||||
/* Now send ch2 to SCHED_CHAN_WAITING_FOR_CELLS */
|
||||
scheduler_channel_wants_writes(ch2);
|
||||
tt_int_op(ch2->scheduler_state, ==, SCHED_CHAN_WAITING_FOR_CELLS);
|
||||
|
||||
/* Drop ch2 back to idle */
|
||||
scheduler_channel_doesnt_want_writes(ch2);
|
||||
tt_int_op(ch2->scheduler_state, ==, SCHED_CHAN_IDLE);
|
||||
|
||||
/* ...and back to SCHED_CHAN_WAITING_FOR_CELLS */
|
||||
scheduler_channel_wants_writes(ch2);
|
||||
tt_int_op(ch2->scheduler_state, ==, SCHED_CHAN_WAITING_FOR_CELLS);
|
||||
|
||||
/* ...and this should kick ch2 into SCHED_CHAN_PENDING */
|
||||
scheduler_channel_has_waiting_cells(ch2);
|
||||
tt_int_op(ch2->scheduler_state, ==, SCHED_CHAN_PENDING);
|
||||
tt_int_op(smartlist_len(channels_pending), ==, 2);
|
||||
|
||||
/*
|
||||
* Now we've got two pending channels and need to fire off
|
||||
* scheduler_run(); first, unmock it.
|
||||
*/
|
||||
|
||||
UNMOCK(scheduler_run);
|
||||
|
||||
scheduler_run();
|
||||
|
||||
/* Now re-mock it */
|
||||
MOCK(scheduler_run, scheduler_run_noop_mock);
|
||||
|
||||
/*
|
||||
* Assert that they're still in the states we left and aren't still
|
||||
* pending
|
||||
*/
|
||||
tt_int_op(ch1->state, ==, CHANNEL_STATE_OPEN);
|
||||
tt_int_op(ch2->state, ==, CHANNEL_STATE_OPENING);
|
||||
tt_assert(ch1->scheduler_state != SCHED_CHAN_PENDING);
|
||||
tt_assert(ch2->scheduler_state != SCHED_CHAN_PENDING);
|
||||
tt_int_op(smartlist_len(channels_pending), ==, 0);
|
||||
|
||||
/* Now, finish opening ch2, and get both back to pending */
|
||||
channel_change_state(ch2, CHANNEL_STATE_OPEN);
|
||||
scheduler_channel_wants_writes(ch1);
|
||||
scheduler_channel_wants_writes(ch2);
|
||||
scheduler_channel_has_waiting_cells(ch1);
|
||||
scheduler_channel_has_waiting_cells(ch2);
|
||||
tt_int_op(ch1->state, ==, CHANNEL_STATE_OPEN);
|
||||
tt_int_op(ch2->state, ==, CHANNEL_STATE_OPEN);
|
||||
tt_int_op(ch1->scheduler_state, ==, SCHED_CHAN_PENDING);
|
||||
tt_int_op(ch2->scheduler_state, ==, SCHED_CHAN_PENDING);
|
||||
tt_int_op(smartlist_len(channels_pending), ==, 2);
|
||||
|
||||
/* Now, set up the channel_flush_some_cells() mock */
|
||||
MOCK(channel_flush_some_cells, channel_flush_some_cells_mock);
|
||||
/*
|
||||
* 16 cells on ch1 means it'll completely drain into the 32 cells
|
||||
* fakechan's num_cells_writeable() returns.
|
||||
*/
|
||||
channel_flush_some_cells_mock_set(ch1, 16);
|
||||
/*
|
||||
* This one should get sent back to pending, since num_cells_writeable()
|
||||
* will still return non-zero.
|
||||
*/
|
||||
channel_flush_some_cells_mock_set(ch2, 48);
|
||||
|
||||
/*
|
||||
* And re-run the scheduler_run() loop with non-zero returns from
|
||||
* channel_flush_some_cells() this time.
|
||||
*/
|
||||
UNMOCK(scheduler_run);
|
||||
|
||||
scheduler_run();
|
||||
|
||||
/* Now re-mock it */
|
||||
MOCK(scheduler_run, scheduler_run_noop_mock);
|
||||
|
||||
/*
|
||||
* ch1 should have gone to SCHED_CHAN_WAITING_FOR_CELLS, with 16 flushed
|
||||
* and 32 writeable.
|
||||
*/
|
||||
tt_int_op(ch1->scheduler_state, ==, SCHED_CHAN_WAITING_FOR_CELLS);
|
||||
/*
|
||||
* ...ch2 should also have gone to SCHED_CHAN_WAITING_FOR_CELLS, with
|
||||
* channel_more_to_flush() returning false and channel_num_cells_writeable()
|
||||
* > 0/
|
||||
*/
|
||||
tt_int_op(ch2->scheduler_state, ==, SCHED_CHAN_WAITING_FOR_CELLS);
|
||||
|
||||
/* Close */
|
||||
channel_mark_for_close(ch1);
|
||||
tt_int_op(ch1->state, ==, CHANNEL_STATE_CLOSING);
|
||||
channel_mark_for_close(ch2);
|
||||
tt_int_op(ch2->state, ==, CHANNEL_STATE_CLOSING);
|
||||
channel_closed(ch1);
|
||||
tt_int_op(ch1->state, ==, CHANNEL_STATE_CLOSED);
|
||||
ch1 = NULL;
|
||||
channel_closed(ch2);
|
||||
tt_int_op(ch2->state, ==, CHANNEL_STATE_CLOSED);
|
||||
ch2 = NULL;
|
||||
|
||||
/* Shut things down */
|
||||
channel_flush_some_cells_mock_free_all();
|
||||
channel_free_all();
|
||||
scheduler_free_all();
|
||||
mock_event_free_all();
|
||||
|
||||
done:
|
||||
tor_free(ch1);
|
||||
tor_free(ch2);
|
||||
|
||||
UNMOCK(channel_flush_some_cells);
|
||||
UNMOCK(scheduler_compare_channels);
|
||||
UNMOCK(scheduler_run);
|
||||
UNMOCK(tor_libevent_get_base);
|
||||
}
|
||||
|
||||
static void
|
||||
test_scheduler_queue_heuristic(void *arg)
|
||||
{
|
||||
time_t now = approx_time();
|
||||
uint64_t qh;
|
||||
|
||||
(void)arg;
|
||||
|
||||
queue_heuristic = 0;
|
||||
queue_heuristic_timestamp = 0;
|
||||
|
||||
/* Not yet inited case */
|
||||
scheduler_update_queue_heuristic(now - 180);
|
||||
tt_int_op(queue_heuristic, ==, 0);
|
||||
tt_int_op(queue_heuristic_timestamp, ==, now - 180);
|
||||
|
||||
queue_heuristic = 1000000000L;
|
||||
queue_heuristic_timestamp = now - 120;
|
||||
|
||||
scheduler_update_queue_heuristic(now - 119);
|
||||
tt_int_op(queue_heuristic, ==, 500000000L);
|
||||
tt_int_op(queue_heuristic_timestamp, ==, now - 119);
|
||||
|
||||
scheduler_update_queue_heuristic(now - 116);
|
||||
tt_int_op(queue_heuristic, ==, 62500000L);
|
||||
tt_int_op(queue_heuristic_timestamp, ==, now - 116);
|
||||
|
||||
qh = scheduler_get_queue_heuristic();
|
||||
tt_int_op(qh, ==, 0);
|
||||
|
||||
done:
|
||||
return;
|
||||
}
|
||||
|
||||
struct testcase_t scheduler_tests[] = {
|
||||
{ "channel_states", test_scheduler_channel_states, TT_FORK, NULL, NULL },
|
||||
{ "compare_channels", test_scheduler_compare_channels,
|
||||
TT_FORK, NULL, NULL },
|
||||
{ "initfree", test_scheduler_initfree, TT_FORK, NULL, NULL },
|
||||
{ "loop", test_scheduler_loop, TT_FORK, NULL, NULL },
|
||||
{ "queue_heuristic", test_scheduler_queue_heuristic,
|
||||
TT_FORK, NULL, NULL },
|
||||
END_OF_TESTCASES
|
||||
};
|
||||
|
||||
Loading…
Reference in New Issue
Block a user