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Merge remote-tracking branch 'dgoulet/ticket25163_033_01'

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This commit is contained in:
Nick Mathewson 2018-02-07 12:46:27 -05:00
commit 12b58ba551
8 changed files with 11 additions and 331 deletions
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4
changes/ticket25163 Normal file
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@ -0,0 +1,4 @@
o Code simplification and refactoring (rephist):
- Remove a series of counters used to track circuit extend attemps and
connection status but that in reality we aren't using for anything other
than stats logged by a SIGUSR1 signal. Closes ticket 25163.

1
src/or/channel.c
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@ -1882,7 +1882,6 @@ channel_do_open_actions(channel_t *chan)
if (started_here) {
circuit_build_times_network_is_live(get_circuit_build_times_mutable());
rep_hist_note_connect_succeeded(chan->identity_digest, now);
router_set_status(chan->identity_digest, 1);
} else {
/* only report it to the geoip module if it's not a known router */

40
src/or/circuitbuild.c
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@ -347,45 +347,6 @@ circuit_log_path(int severity, unsigned int domain, origin_circuit_t *circ)
tor_free(s);
}
/** Tell the rep(utation)hist(ory) module about the status of the links
* in <b>circ</b>. Hops that have become OPEN are marked as successfully
* extended; the _first_ hop that isn't open (if any) is marked as
* unable to extend.
*/
/* XXXX Someday we should learn from OR circuits too. */
void
circuit_rep_hist_note_result(origin_circuit_t *circ)
{
crypt_path_t *hop;
const char *prev_digest = NULL;
hop = circ->cpath;
if (!hop) /* circuit hasn't started building yet. */
return;
if (server_mode(get_options())) {
const routerinfo_t *me = router_get_my_routerinfo();
if (!me)
return;
prev_digest = me->cache_info.identity_digest;
}
do {
const node_t *node = node_get_by_id(hop->extend_info->identity_digest);
if (node) { /* Why do we check this? We know the identity. -NM XXXX */
if (prev_digest) {
if (hop->state == CPATH_STATE_OPEN)
rep_hist_note_extend_succeeded(prev_digest, node->identity);
else {
rep_hist_note_extend_failed(prev_digest, node->identity);
break;
}
}
prev_digest = node->identity;
} else {
prev_digest = NULL;
}
hop=hop->next;
} while (hop!=circ->cpath);
}
/** Return 1 iff every node in circ's cpath definitely supports ntor. */
static int
circuit_cpath_supports_ntor(const origin_circuit_t *circ)
@ -1075,7 +1036,6 @@ circuit_build_no_more_hops(origin_circuit_t *circ)
}
pathbias_count_build_success(circ);
circuit_rep_hist_note_result(circ);
if (is_usable_for_streams)
circuit_has_opened(circ); /* do other actions as necessary */

1
src/or/circuitbuild.h
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@ -17,7 +17,6 @@ char *circuit_list_path(origin_circuit_t *circ, int verbose);
char *circuit_list_path_for_controller(origin_circuit_t *circ);
void circuit_log_path(int severity, unsigned int domain,
origin_circuit_t *circ);
void circuit_rep_hist_note_result(origin_circuit_t *circ);
origin_circuit_t *origin_circuit_init(uint8_t purpose, int flags);
origin_circuit_t *circuit_establish_circuit(uint8_t purpose,
extend_info_t *exit,

4
src/or/circuitlist.c
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@ -1986,8 +1986,7 @@ circuit_mark_all_dirty_circs_as_unusable(void)
* - If state is onionskin_pending, remove circ from the onion_pending
* list.
* - If circ isn't open yet: call circuit_build_failed() if we're
* the origin, and in either case call circuit_rep_hist_note_result()
* to note stats.
* the origin.
* - If purpose is C_INTRODUCE_ACK_WAIT, report the intro point
* failure we just had to the hidden service client module.
* - If purpose is C_INTRODUCING and <b>reason</b> isn't TIMEOUT,
@ -2123,7 +2122,6 @@ circuit_about_to_free(circuit_t *circ)
if (CIRCUIT_IS_ORIGIN(circ)) {
origin_circuit_t *ocirc = TO_ORIGIN_CIRCUIT(circ);
circuit_build_failed(ocirc); /* take actions if necessary */
circuit_rep_hist_note_result(ocirc);
}
}
if (circ->state == CIRCUIT_STATE_CHAN_WAIT) {

4
src/or/connection_or.c
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@ -705,7 +705,6 @@ connection_or_finished_connecting(or_connection_t *or_conn)
void
connection_or_about_to_close(or_connection_t *or_conn)
{
time_t now = time(NULL);
connection_t *conn = TO_CONN(or_conn);
/* Tell the controlling channel we're closed */
@ -725,7 +724,6 @@ connection_or_about_to_close(or_connection_t *or_conn)
if (connection_or_nonopen_was_started_here(or_conn)) {
const or_options_t *options = get_options();
connection_or_note_state_when_broken(or_conn);
rep_hist_note_connect_failed(or_conn->identity_digest, now);
/* Tell the new guard API about the channel failure */
entry_guard_chan_failed(TLS_CHAN_TO_BASE(or_conn->chan));
if (conn->state >= OR_CONN_STATE_TLS_HANDSHAKING) {
@ -741,11 +739,9 @@ connection_or_about_to_close(or_connection_t *or_conn)
} else if (conn->hold_open_until_flushed) {
/* We only set hold_open_until_flushed when we're intentionally
* closing a connection. */
rep_hist_note_disconnect(or_conn->identity_digest, now);
control_event_or_conn_status(or_conn, OR_CONN_EVENT_CLOSED,
tls_error_to_orconn_end_reason(or_conn->tls_error));
} else if (!tor_digest_is_zero(or_conn->identity_digest)) {
rep_hist_note_connection_died(or_conn->identity_digest, now);
control_event_or_conn_status(or_conn, OR_CONN_EVENT_CLOSED,
tls_error_to_orconn_end_reason(or_conn->tls_error));
}

281
src/or/rephist.c
View File

@ -110,38 +110,12 @@ uint32_t rephist_total_num=0;
* 20X as much as one that ended a month ago, and routers that have had no
* uptime data for about half a year will get forgotten.) */
/** History of an OR-\>OR link. */
typedef struct link_history_t {
/** When did we start tracking this list? */
time_t since;
/** When did we most recently note a change to this link */
time_t changed;
/** How many times did extending from OR1 to OR2 succeed? */
unsigned long n_extend_ok;
/** How many times did extending from OR1 to OR2 fail? */
unsigned long n_extend_fail;
} link_history_t;
/** History of an OR. */
typedef struct or_history_t {
/** When did we start tracking this OR? */
time_t since;
/** When did we most recently note a change to this OR? */
time_t changed;
/** How many times did we successfully connect? */
unsigned long n_conn_ok;
/** How many times did we try to connect and fail?*/
unsigned long n_conn_fail;
/** How many seconds have we been connected to this OR before
* 'up_since'? */
unsigned long uptime;
/** How many seconds have we been unable to connect to this OR before
* 'down_since'? */
unsigned long downtime;
/** If nonzero, we have been connected since this time. */
time_t up_since;
/** If nonzero, we have been unable to connect since this time. */
time_t down_since;
/** The address at which we most recently connected to this OR
* successfully. */
@ -163,10 +137,6 @@ typedef struct or_history_t {
time_t start_of_downtime;
unsigned long weighted_uptime;
unsigned long total_weighted_time;
/** Map from hex OR2 identity digest to a link_history_t for the link
* from this OR to OR2. */
digestmap_t *link_history_map;
} or_history_t;
/**
@ -232,7 +202,6 @@ get_or_history(const char* id)
hist = tor_malloc_zero(sizeof(or_history_t));
rephist_total_alloc += sizeof(or_history_t);
rephist_total_num++;
hist->link_history_map = digestmap_new();
hist->since = hist->changed = time(NULL);
tor_addr_make_unspec(&hist->last_reached_addr);
digestmap_set(history_map, id, hist);
@ -240,66 +209,16 @@ get_or_history(const char* id)
return hist;
}
/** Return the link_history_t for the link from the first named OR to
* the second, creating it if necessary. (ORs are identified by
* identity digest.)
*/
static link_history_t *
get_link_history(const char *from_id, const char *to_id)
{
or_history_t *orhist;
link_history_t *lhist;
orhist = get_or_history(from_id);
if (!orhist)
return NULL;
if (tor_digest_is_zero(to_id))
return NULL;
lhist = digestmap_get(orhist->link_history_map, to_id);
if (!lhist) {
lhist = tor_malloc_zero(sizeof(link_history_t));
rephist_total_alloc += sizeof(link_history_t);
lhist->since = lhist->changed = time(NULL);
digestmap_set(orhist->link_history_map, to_id, lhist);
}
return lhist;
}
/** Helper: free storage held by a single link history entry. */
static void
free_link_history_(void *val)
{
rephist_total_alloc -= sizeof(link_history_t);
tor_free(val);
}
/** Helper: free storage held by a single OR history entry. */
static void
free_or_history(void *_hist)
{
or_history_t *hist = _hist;
digestmap_free(hist->link_history_map, free_link_history_);
rephist_total_alloc -= sizeof(or_history_t);
rephist_total_num--;
tor_free(hist);
}
/** Update an or_history_t object <b>hist</b> so that its uptime/downtime
* count is up-to-date as of <b>when</b>.
*/
static void
update_or_history(or_history_t *hist, time_t when)
{
tor_assert(hist);
if (hist->up_since) {
tor_assert(!hist->down_since);
hist->uptime += (when - hist->up_since);
hist->up_since = when;
} else if (hist->down_since) {
hist->downtime += (when - hist->down_since);
hist->down_since = when;
}
}
/** Initialize the static data structures for tracking history. */
void
rep_hist_init(void)
@ -309,99 +228,6 @@ rep_hist_init(void)
predicted_ports_alloc();
}
/** Helper: note that we are no longer connected to the router with history
* <b>hist</b>. If <b>failed</b>, the connection failed; otherwise, it was
* closed correctly. */
static void
mark_or_down(or_history_t *hist, time_t when, int failed)
{
if (hist->up_since) {
hist->uptime += (when - hist->up_since);
hist->up_since = 0;
}
if (failed && !hist->down_since) {
hist->down_since = when;
}
}
/** Helper: note that we are connected to the router with history
* <b>hist</b>. */
static void
mark_or_up(or_history_t *hist, time_t when)
{
if (hist->down_since) {
hist->downtime += (when - hist->down_since);
hist->down_since = 0;
}
if (!hist->up_since) {
hist->up_since = when;
}
}
/** Remember that an attempt to connect to the OR with identity digest
* <b>id</b> failed at <b>when</b>.
*/
void
rep_hist_note_connect_failed(const char* id, time_t when)
{
or_history_t *hist;
hist = get_or_history(id);
if (!hist)
return;
++hist->n_conn_fail;
mark_or_down(hist, when, 1);
hist->changed = when;
}
/** Remember that an attempt to connect to the OR with identity digest
* <b>id</b> succeeded at <b>when</b>.
*/
void
rep_hist_note_connect_succeeded(const char* id, time_t when)
{
or_history_t *hist;
hist = get_or_history(id);
if (!hist)
return;
++hist->n_conn_ok;
mark_or_up(hist, when);
hist->changed = when;
}
/** Remember that we intentionally closed our connection to the OR
* with identity digest <b>id</b> at <b>when</b>.
*/
void
rep_hist_note_disconnect(const char* id, time_t when)
{
or_history_t *hist;
hist = get_or_history(id);
if (!hist)
return;
mark_or_down(hist, when, 0);
hist->changed = when;
}
/** Remember that our connection to the OR with identity digest
* <b>id</b> had an error and stopped working at <b>when</b>.
*/
void
rep_hist_note_connection_died(const char* id, time_t when)
{
or_history_t *hist;
if (!id) {
/* If conn has no identity, it didn't complete its handshake, or something
* went wrong. Ignore it.
*/
return;
}
hist = get_or_history(id);
if (!hist)
return;
mark_or_down(hist, when, 1);
hist->changed = when;
}
/** We have just decided that this router with identity digest <b>id</b> is
* reachable, meaning we will give it a "Running" flag for the next while. */
void
@ -538,7 +364,6 @@ rep_hist_make_router_pessimal(const char *id, time_t when)
tor_assert(hist);
rep_hist_note_router_unreachable(id, when);
mark_or_down(hist, when, 1);
hist->weighted_run_length = 0;
hist->weighted_uptime = 0;
@ -715,57 +540,17 @@ rep_hist_have_measured_enough_stability(void)
return started_tracking_stability < time(NULL) - 4*60*60;
}
/** Remember that we successfully extended from the OR with identity
* digest <b>from_id</b> to the OR with identity digest
* <b>to_name</b>.
*/
void
rep_hist_note_extend_succeeded(const char *from_id, const char *to_id)
{
link_history_t *hist;
/* log_fn(LOG_WARN, "EXTEND SUCCEEDED: %s->%s",from_name,to_name); */
hist = get_link_history(from_id, to_id);
if (!hist)
return;
++hist->n_extend_ok;
hist->changed = time(NULL);
}
/** Remember that we tried to extend from the OR with identity digest
* <b>from_id</b> to the OR with identity digest <b>to_name</b>, but
* failed.
*/
void
rep_hist_note_extend_failed(const char *from_id, const char *to_id)
{
link_history_t *hist;
/* log_fn(LOG_WARN, "EXTEND FAILED: %s->%s",from_name,to_name); */
hist = get_link_history(from_id, to_id);
if (!hist)
return;
++hist->n_extend_fail;
hist->changed = time(NULL);
}
/** Log all the reliability data we have remembered, with the chosen
* severity.
*/
void
rep_hist_dump_stats(time_t now, int severity)
{
digestmap_iter_t *lhist_it;
digestmap_iter_t *orhist_it;
const char *name1, *name2, *digest1, *digest2;
const char *name1, *digest1;
char hexdigest1[HEX_DIGEST_LEN+1];
char hexdigest2[HEX_DIGEST_LEN+1];
or_history_t *or_history;
link_history_t *link_history;
void *or_history_p, *link_history_p;
double uptime;
char buffer[2048];
size_t len;
int ret;
unsigned long upt, downt;
void *or_history_p;
const node_t *node;
rep_history_clean(now - get_options()->RephistTrackTime);
@ -785,52 +570,12 @@ rep_hist_dump_stats(time_t now, int severity)
else
name1 = "(unknown)";
base16_encode(hexdigest1, sizeof(hexdigest1), digest1, DIGEST_LEN);
update_or_history(or_history, now);
upt = or_history->uptime;
downt = or_history->downtime;
s = get_stability(or_history, now);
stability = (long)s;
if (upt+downt) {
uptime = ((double)upt) / (upt+downt);
} else {
uptime=1.0;
}
tor_log(severity, LD_HIST,
"OR %s [%s]: %ld/%ld good connections; uptime %ld/%ld sec (%.2f%%); "
"wmtbf %lu:%02lu:%02lu",
"OR %s [%s]: wmtbf %lu:%02lu:%02lu",
name1, hexdigest1,
or_history->n_conn_ok, or_history->n_conn_fail+or_history->n_conn_ok,
upt, upt+downt, uptime*100.0,
stability/3600, (stability/60)%60, stability%60);
if (!digestmap_isempty(or_history->link_history_map)) {
strlcpy(buffer, " Extend attempts: ", sizeof(buffer));
len = strlen(buffer);
for (lhist_it = digestmap_iter_init(or_history->link_history_map);
!digestmap_iter_done(lhist_it);
lhist_it = digestmap_iter_next(or_history->link_history_map,
lhist_it)) {
digestmap_iter_get(lhist_it, &digest2, &link_history_p);
if ((node = node_get_by_id(digest2)) && node_get_nickname(node))
name2 = node_get_nickname(node);
else
name2 = "(unknown)";
link_history = (link_history_t*) link_history_p;
base16_encode(hexdigest2, sizeof(hexdigest2), digest2, DIGEST_LEN);
ret = tor_snprintf(buffer+len, 2048-len, "%s [%s](%ld/%ld); ",
name2,
hexdigest2,
link_history->n_extend_ok,
link_history->n_extend_ok+link_history->n_extend_fail);
if (ret<0)
break;
else
len += ret;
}
tor_log(severity, LD_HIST, "%s", buffer);
}
}
}
@ -842,10 +587,9 @@ rep_history_clean(time_t before)
{
int authority = authdir_mode(get_options());
or_history_t *or_history;
link_history_t *link_history;
void *or_history_p, *link_history_p;
digestmap_iter_t *orhist_it, *lhist_it;
const char *d1, *d2;
void *or_history_p;
digestmap_iter_t *orhist_it;
const char *d1;
orhist_it = digestmap_iter_init(history_map);
while (!digestmap_iter_done(orhist_it)) {
@ -862,19 +606,6 @@ rep_history_clean(time_t before)
free_or_history(or_history);
continue;
}
for (lhist_it = digestmap_iter_init(or_history->link_history_map);
!digestmap_iter_done(lhist_it); ) {
digestmap_iter_get(lhist_it, &d2, &link_history_p);
link_history = link_history_p;
if (link_history->changed < before) {
lhist_it = digestmap_iter_next_rmv(or_history->link_history_map,
lhist_it);
rephist_total_alloc -= sizeof(link_history_t);
tor_free(link_history);
continue;
}
lhist_it = digestmap_iter_next(or_history->link_history_map,lhist_it);
}
orhist_it = digestmap_iter_next(history_map, orhist_it);
}
}

7
src/or/rephist.h
View File

@ -13,13 +13,6 @@
#define TOR_REPHIST_H
void rep_hist_init(void);
void rep_hist_note_connect_failed(const char* nickname, time_t when);
void rep_hist_note_connect_succeeded(const char* nickname, time_t when);
void rep_hist_note_disconnect(const char* nickname, time_t when);
void rep_hist_note_connection_died(const char* nickname, time_t when);
void rep_hist_note_extend_succeeded(const char *from_name,
const char *to_name);
void rep_hist_note_extend_failed(const char *from_name, const char *to_name);
void rep_hist_dump_stats(time_t now, int severity);
void rep_hist_note_bytes_read(size_t num_bytes, time_t when);
void rep_hist_note_bytes_written(size_t num_bytes, time_t when);