commit 68ae5afa5a172fbc485eda7e6bfd4750fa6a69f5 Author: Nick Mathewson nickm@torproject.org Date: Tue May 3 17:28:28 2011 -0400

Change who calls microdesc_cache_rebuild().

Previously we ensured that it would get called periodically by doing it from inside the code that added microdescriptors. That won't work though: it would interfere with our code that tried to read microdescs from disk initially. Instead, we should consider rebuilding the cache periodically, and on startup. --- changes/bug2230_part4 | 6 ++++++ src/or/main.c | 2 ++ src/or/microdesc.c | 11 ++++++++--- 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/changes/bug2230_part4 b/changes/bug2230_part4 new file mode 100644 index 0000000..f7721fa --- /dev/null +++ b/changes/bug2230_part4 @@ -0,0 +1,6 @@ + o Minor bugfixes: + - Authorities now clean their microdesc cache periodically and when + reading from disk initially, not only when adding new descriptors. + This prevents a bug where we could lose microdescriptors. Bugfix + on 0.2.2.6-alpha. + diff --git a/src/or/main.c b/src/or/main.c index a26be39..462b51e 100644 --- a/src/or/main.c +++ b/src/or/main.c @@ -1075,6 +1075,8 @@ run_scheduled_events(time_t now) rep_history_clean(now - options->RephistTrackTime); rend_cache_clean(); rend_cache_clean_v2_descs_as_dir(); + if (authdir_mode_v3(options)) + microdesc_cache_rebuild(NULL, 0); #define CLEAN_CACHES_INTERVAL (30*60) time_to_clean_caches = now + CLEAN_CACHES_INTERVAL; } diff --git a/src/or/microdesc.c b/src/or/microdesc.c index c6bb3c6..73d2285 100644 --- a/src/or/microdesc.c +++ b/src/or/microdesc.c @@ -208,8 +208,6 @@ microdescs_add_list_to_cache(microdesc_cache_t *cache, if (f) finish_writing_to_file(open_file); /*XXX Check me.*/

- microdesc_cache_rebuild(cache, 0/* only as needed */); - return added; }

@@ -230,6 +228,7 @@ microdesc_cache_clear(microdesc_cache_t *cache) } cache->total_len_seen = 0; cache->n_seen = 0; + cache->bytes_dropped = 0; }

/** Reload the contents of <b>cache</b> from disk. If it is empty, load it @@ -271,7 +270,7 @@ microdesc_cache_reload(microdesc_cache_t *cache) log_notice(LD_DIR, "Reloaded microdescriptor cache. Found %d descriptors.", total);

- microdesc_cache_clean(cache, 0, 0); + microdesc_cache_rebuild(cache, 0 /* don't force */);

return 0; } @@ -354,6 +353,12 @@ microdesc_cache_rebuild(microdesc_cache_t *cache, int force) off_t off = 0; int orig_size, new_size;

+ if (cache == NULL) { + cache = the_microdesc_cache; + if (cache == NULL) + return 0; + } + /* Remove dead descriptors */ microdesc_cache_clean(cache, 0/*cutoff*/, 0/*force*/);