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write v3-status-votes file earlier in consensus voting

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Make directory authorities write the v3-status-votes file out
to disk earlier in the consensus process, so we have the votes
even if we abort the consensus process later on.

Resolves ticket 19036.
This commit is contained in:
Roger Dingledine 2016-05-11 17:34:38 -04:00
parent 9e44273a4a
commit 694f1fe808
2 changed files with 24 additions and 18 deletions
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4
changes/feature19036 Normal file
View file

@ -0,0 +1,4 @@
o Minor features:
- Make directory authorities write the v3-status-votes file out
to disk earlier in the consensus process, so we have the votes
even if we abort the consensus process below. Resolves ticket 19036.

38
src/or/dirvote.c
View file

@ -3040,6 +3040,26 @@ dirvote_compute_consensuses(void)
if (!pending_vote_list)
pending_vote_list = smartlist_new();
/* write the votes out to disk early, so we have them even if we abort
* the consensus process below. */
votes = smartlist_new();
votestrings = smartlist_new();
SMARTLIST_FOREACH(pending_vote_list, pending_vote_t *, v,
{
sized_chunk_t *c = tor_malloc(sizeof(sized_chunk_t));
c->bytes = v->vote_body->dir;
c->len = v->vote_body->dir_len;
smartlist_add(votestrings, c); /* collect strings to write to disk */
smartlist_add(votes, v->vote); /* collect votes to compute consensus */
});
votefile = get_datadir_fname("v3-status-votes");
write_chunks_to_file(votefile, votestrings, 0, 0);
tor_free(votefile);
SMARTLIST_FOREACH(votestrings, sized_chunk_t *, c, tor_free(c));
smartlist_free(votestrings);
n_voters = get_n_authorities(V3_DIRINFO);
n_votes = smartlist_len(pending_vote_list);
if (n_votes <= n_voters/2) {
@ -3066,24 +3086,6 @@ dirvote_compute_consensuses(void)
goto err;
}
votes = smartlist_new();
votestrings = smartlist_new();
SMARTLIST_FOREACH(pending_vote_list, pending_vote_t *, v,
{
sized_chunk_t *c = tor_malloc(sizeof(sized_chunk_t));
c->bytes = v->vote_body->dir;
c->len = v->vote_body->dir_len;
smartlist_add(votestrings, c); /* collect strings to write to disk */
smartlist_add(votes, v->vote); /* collect votes to compute consensus */
});
votefile = get_datadir_fname("v3-status-votes");
write_chunks_to_file(votefile, votestrings, 0, 0);
tor_free(votefile);
SMARTLIST_FOREACH(votestrings, sized_chunk_t *, c, tor_free(c));
smartlist_free(votestrings);
{
char legacy_dbuf[DIGEST_LEN];
crypto_pk_t *legacy_sign=NULL;