diff --git a/changes/bug11742 b/changes/bug11742
new file mode 100644
index 0000000000..000487120d
--- /dev/null
+++ b/changes/bug11742
@@ -0,0 +1,4 @@
+ o Removed code:
+ - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
+ and MTBF calculations, but that nobody was using. Fixes #11742.
+
diff --git a/src/or/directory.c b/src/or/directory.c
index 76cb8fa0bc..428fd01be4 100644
--- a/src/or/directory.c
+++ b/src/or/directory.c
@@ -3065,22 +3065,6 @@ directory_handle_command_get(dir_connection_t *conn, const char *headers,
goto done;
}
- if (!strcmp(url,"/tor/dbg-stability.txt")) {
- const char *stability;
- size_t len;
- if (options->BridgeAuthoritativeDir ||
- ! authdir_mode_tests_reachability(options) ||
- ! (stability = rep_hist_get_router_stability_doc(time(NULL)))) {
- write_http_status_line(conn, 404, "Not found.");
- goto done;
- }
-
- len = strlen(stability);
- write_http_response_header(conn, len, 0, 0);
- connection_write_to_buf(stability, len, TO_CONN(conn));
- goto done;
- }
-
#if defined(EXPORTMALLINFO) && defined(HAVE_MALLOC_H) && defined(HAVE_MALLINFO)
#define ADD_MALLINFO_LINE(x) do { \
smartlist_add_asprintf(lines, "%s %d\n", #x, mi.x); \
diff --git a/src/or/rephist.c b/src/or/rephist.c
index 70be39e230..a0f24e18f7 100644
--- a/src/or/rephist.c
+++ b/src/or/rephist.c
@@ -879,126 +879,6 @@ rep_hist_record_mtbf_data(time_t now, int missing_means_down)
return -1;
}
-/** Format the current tracked status of the router in hist at time
- * now for analysis; return it in a newly allocated string. */
-static char *
-rep_hist_format_router_status(or_history_t *hist, time_t now)
-{
- char sor_buf[ISO_TIME_LEN+1];
- char sod_buf[ISO_TIME_LEN+1];
- double wfu;
- double mtbf;
- int up = 0, down = 0;
- char *cp = NULL;
-
- if (hist->start_of_run) {
- format_iso_time(sor_buf, hist->start_of_run);
- up = 1;
- }
- if (hist->start_of_downtime) {
- format_iso_time(sod_buf, hist->start_of_downtime);
- down = 1;
- }
-
- wfu = get_weighted_fractional_uptime(hist, now);
- mtbf = get_stability(hist, now);
- tor_asprintf(&cp,
- "%s%s%s"
- "%s%s%s"
- "wfu %0.3f\n"
- " weighted-time %lu\n"
- " weighted-uptime %lu\n"
- "mtbf %0.1f\n"
- " weighted-run-length %lu\n"
- " total-run-weights %f\n",
- up?"uptime-started ":"", up?sor_buf:"", up?" UTC\n":"",
- down?"downtime-started ":"", down?sod_buf:"", down?" UTC\n":"",
- wfu,
- hist->total_weighted_time,
- hist->weighted_uptime,
- mtbf,
- hist->weighted_run_length,
- hist->total_run_weights
- );
- return cp;
-}
-
-/** The last stability analysis document that we created, or NULL if we never
- * have created one. */
-static char *last_stability_doc = NULL;
-/** The last time we created a stability analysis document, or 0 if we never
- * have created one. */
-static time_t built_last_stability_doc_at = 0;
-/** Shortest allowable time between building two stability documents. */
-#define MAX_STABILITY_DOC_BUILD_RATE (3*60)
-
-/** Return a pointer to a NUL-terminated document describing our view of the
- * stability of the routers we've been tracking. Return NULL on failure. */
-const char *
-rep_hist_get_router_stability_doc(time_t now)
-{
- char *result;
- smartlist_t *chunks;
- if (built_last_stability_doc_at + MAX_STABILITY_DOC_BUILD_RATE > now)
- return last_stability_doc;
-
- if (!history_map)
- return NULL;
-
- tor_free(last_stability_doc);
- chunks = smartlist_new();
-
- if (rep_hist_have_measured_enough_stability()) {
- smartlist_add(chunks, tor_strdup("we-have-enough-measurements\n"));
- } else {
- smartlist_add(chunks, tor_strdup("we-do-not-have-enough-measurements\n"));
- }
-
- DIGESTMAP_FOREACH(history_map, id, or_history_t *, hist) {
- const node_t *node;
- char dbuf[BASE64_DIGEST_LEN+1];
- char *info;
- digest_to_base64(dbuf, id);
- node = node_get_by_id(id);
- if (node) {
- char ip[INET_NTOA_BUF_LEN+1];
- char tbuf[ISO_TIME_LEN+1];
- time_t published = node_get_published_on(node);
- node_get_address_string(node,ip,sizeof(ip));
- if (published > 0)
- format_iso_time(tbuf, published);
- else
- strlcpy(tbuf, "???", sizeof(tbuf));
- smartlist_add_asprintf(chunks,
- "router %s %s %s\n"
- "published %s\n"
- "relevant-flags %s%s%s\n"
- "declared-uptime %ld\n",
- dbuf, node_get_nickname(node), ip,
- tbuf,
- node->is_running ? "Running " : "",
- node->is_valid ? "Valid " : "",
- node->ri && node->ri->is_hibernating ? "Hibernating " : "",
- node_get_declared_uptime(node));
- } else {
- smartlist_add_asprintf(chunks,
- "router %s {no descriptor}\n", dbuf);
- }
- info = rep_hist_format_router_status(hist, now);
- if (info)
- smartlist_add(chunks, info);
-
- } DIGESTMAP_FOREACH_END;
-
- result = smartlist_join_strings(chunks, "", 0, NULL);
- SMARTLIST_FOREACH(chunks, char *, cp, tor_free(cp));
- smartlist_free(chunks);
-
- last_stability_doc = result;
- built_last_stability_doc_at = time(NULL);
- return result;
-}
-
/** Helper: return the first j >= i such that !strcmpstart(sl[j], prefix) and
* such that no line sl[k] with i <= k < j starts with "R ". Return -1 if no
* such line exists. */
@@ -3041,11 +2921,9 @@ rep_hist_free_all(void)
tor_free(write_array);
tor_free(dir_read_array);
tor_free(dir_write_array);
- tor_free(last_stability_doc);
tor_free(exit_bytes_read);
tor_free(exit_bytes_written);
tor_free(exit_streams);
- built_last_stability_doc_at = 0;
predicted_ports_free();
bidi_map_free();
diff --git a/src/or/rephist.h b/src/or/rephist.h
index df01ae6cb3..cd6231e6e4 100644
--- a/src/or/rephist.h
+++ b/src/or/rephist.h
@@ -47,7 +47,6 @@ double rep_hist_get_stability(const char *id, time_t when);
double rep_hist_get_weighted_fractional_uptime(const char *id, time_t when);
long rep_hist_get_weighted_time_known(const char *id, time_t when);
int rep_hist_have_measured_enough_stability(void);
-const char *rep_hist_get_router_stability_doc(time_t now);
void rep_hist_note_used_port(time_t now, uint16_t port);
smartlist_t *rep_hist_get_predicted_ports(time_t now);