This commit adds some helper functions to look up the diff from one
consensus and to make sure that applying it leads to another. Then
we add them throughout the existing test cases. Doing this turned
up a reference-leaking bug in consensus_diff_worker_replyfn.
In several places in the old code, we had problems that only an
in-memory index of diff status could solve, including:
* Remembering which diffs were in-progress, so that we didn't
re-launch them.
* Remembering which diffs had failed, so that we didn't try to
recompute them over and over.
* Having a fast way to look up the diff from a given consensus to
the latest consensus of a given flavor.
This patch adds a hashtable mapping from (flavor, source diff), to
solve the problem. It maps to a cache entry handle, rather than to
a cache entry directly, so that it doesn't affect the reference
counts of the cache entries, and so that we don't otherwise need to
worry about lifetime management.
This conscache flag tells conscache that it should munmap the
document as soon as reasonably possible, since its usage pattern is
expected to not have a lot of time-locality.
Initial tests. These just try adding a few consensuses, looking
them up, and making sure that consensus diffs are generated in a
more or less reasonable-looking way. It's enough for 87% coverage,
but it leaves out a lot of functionality.
This module's job is to remember old consensus documents, to
calculate their diffs on demand, and to .
There are some incomplete points in this code; I've marked them with
"XXXX". I intend to fix them in separate commits, since I believe
doing it in separate commits will make the branch easier to review.
The GETINFO extra-info/digest/<digest> broke in commit 568dc27a19 that
refactored the base16_decode() API to return the decoded length.
Unfortunately, that if() condition should have checked for the correct length
instead of an error which broke the command in tor-0.2.9.1-alpha.
Fixes#22034
Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit mainly moves the responsibility for directory request
construction one level higher. It also allows a directory request
to contain a pointer to a routerstatus, which will get turned into
the correct contact information at the last minute.
We do dump HS stats now at log info everytime the intro circuit creation retry
period limit has been reached. However, the log was upgraded to warning if we
actually were over the elapsed time (plus an extra slop).
It is actually something that will happen in tor in normal case. For instance,
if the network goes down for 10 minutes then back up again making
have_completed_a_circuit() return false which results in never updating that
retry period marker for a service.
Fixes#22032
Signed-off-by: David Goulet <dgoulet@torproject.org>
This patch makes the internal `get_memlevel()` a part of the public
compression API as `tor_compress_memory_level()`.
See https://bugs.torproject.org/21663
