| Commit message (Collapse) | Author | Age | Files | Lines |
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It's a little overzealous sometimes, but it's mostly to the good.
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Remove all `use` statements for `TryFrom` and `TryInto`. These are
now redundant in Rust 2021.
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This is the logical place for it, I think: the GuardMgr's job is to
pick the first hop for a circuit depending on remembered status for
possible first hops. Making this change will let us streamline the
code that interacts with these objects.
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Remove allow(clippy::disallowed_methods) lint flag.
See merge request tpo/core/arti!437
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The various background daemon tasks that `arti-client` used to spawn are
now handled inside their respective crates instead, with functions
provided to spawn them that return `TaskHandle`s.
This required introducing a new trait, `NetDirProvider`, which steals
some functionality from the `DirProvider` trait to enable `tor-circmgr`
to depend on it (`tor-circmgr` is a dependency of `tor-dirmgr`, so it
can't depend on `DirProvider` directly).
While we're at it, we also make some of the tasks wait for events from
the `NetDirProvider` instead of sleeping, slightly increasing
efficiency.
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Don't use SystemTime::now()
Closes #306
See merge request tpo/core/arti!365
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Every time we want a microdescriptor, we know the index of that
microdesc's corresponding routerstatus within the consensus.
Therefore, we can use that index to store `Arc<Microdesc>`s in a
dense array, and not have to use a HashSet here at all.
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We were using a hashtable to keep track of missing microdescriptor
digests. But this information is redundant with the NetDir state,
and there's now no longer any performance benefit to keeping a
separate copy.
Part of #386.
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We previously kept missing-MD entries and present-MD entries all in
the same HashSet, which resulted in using more slack space than we
need. Now we use separate tables, so we can drop missing-MD
entries as we move forward.
Also, when constructing a NetDir, set its hash tables to their final
capacities.
This also lets us simplify some of our missing-md-listing code a
lot.
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I used
git-grep -P '\#\[serde\((?!default|deny_unknown)'
to find places where I needed to add additional attributes on the
builder method fields.
This is currently a bit duplicative, but when #371 is completely done,
the validated (non-builder) configs won't need to be Deserialize any
more.
This is part of #371 and #372.
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This lint is IMO inherently ill-conceived.
I have looked for the reasons why this might be thought to be a good
idea and there were basically two (and they are sort of contradictory):
I. "Calling ‘.clone()` on an Rc, Arc, or Weak can obscure the fact
that only the pointer is being cloned, not the underlying data."
This is the wording from
https://rust-lang.github.io/rust-clippy/v0.0.212/#clone_on_ref_ptr
It is a bit terse; we are left to infer why it is a bad idea to
obscure this fact. It seems to me that if it is bad to obscure some
fact, that must be because the fact is a hazard. But why would it be
a hazard to not copy the underlying data ?
In other languages, faliing to copy the underlying data is a serious
correctness hazard. There is a whose class of bugs where things were
not copied, and then mutated and/or reused in multiple places in ways
that were not what the programmer intended. In my experience, this is
a very common bug when writing Python and Javascript. I'm told it's
common in golang too.
But in Rust this bug is much much harder to write. The data inside an
Arc is immutable. To have this bug you'd have use interior mutability
- ie mess around with Mutex or RefCell. That provides a good barrier
to these kind of accidents.
II. "The reason for writing Rc::clone and Arc::clone [is] to make it
clear that only the pointer is being cloned, as opposed to the
underlying data. The former is always fast, while the latter can
be very expensive depending on what is being cloned."
This is the reasoning found here
https://github.com/rust-lang/rust-clippy/issues/2048
This is saying that *not* using Arc::clone is hazardous.
Specifically, that a deep clone is a performance hazard.
But for this argument, the lint is precisely backwards. It's linting
the "good" case and asking for it to be written in a more explicit
way; while the supposedly bad case can be written conveniently.
Also, many objects (in our codebase, and in all the libraries we use)
that are Clone are in fact simply handles. They contain Arc(s) (or
similar) and are cheap to clone. Indeed, that is the usual case.
It does not make sense to distinguish in the syntax we use to clone
such a handle, whether the handle is a transparent Arc, or an opaque
struct containing one or more other handles.
Forcing Arc::clone to be written as such makes for code churn when a
type is changed from Arc<Something> to Something: Clone, or vice
versa.
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There's no reason to have the test-network-construction code share an
error enum with the main netdir code.
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This turns out to have been most of them, which
simplifies matters a lot.
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Refactor errors in tor-netdoc
See merge request tpo/core/arti!314
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Every other case of tor_netdoc::Error means a parse failure. This one,
though, means a failure to construct a document.
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Closes #338.
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Make most arti-client fields reconfigurable.
See merge request tpo/core/arti!181
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This is still not as soon as I'd like: a real change here will require
refactoring DirMgr::notify().
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We had no function to infallibly convert BoundedInt32<{0 or 1},H>
into a u32, even though we could have. Because of that, we were
treating weight_scale as an i32 when logically it's a u32 or a
NonZeroU32.
Moreover, it turns out we were using an incorrect minimum for the
bwweightscale param, which would in theory have allowed the
authorities to make us divide by zero.
This patch introduces the necessary From<> implementation and uses
it. It corrects the binimum bwweightscale, and prevents a
division-by-zero issue in case weight_scale is zero.
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I've opened torspec!54 to fill in the missing parts of the spec
about these issues.
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Squash, refactor, and test !139 (Don't use same family as exit when picking a guard)
Closes #183
See merge request tpo/core/arti!173
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Just as `in_same_family` is a member of Relay, so the function for
getting all the real family members of a relay should belong in the
same crate.
This change also removes the `family()` accessor: it gives the _claimed_ family rather
than the _acknlowedged_ family, and is therefore a bit dangerous.
There's still a hole in this logic; I've noted it in the Limitations
section. If we get a microdescriptor for a relay in between creating
and using the guard restriction, it might be omitted from the family
list.
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The rand crate's documentation says it's not okay to rely on StdRng
having reproducible output. So instead, let's switch to ChaCha12Rng
instead (which is what StrRng currently uses).
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Also fix some commonwealth spellings that had slipped in.
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Doing this is necessary for reconfiguration support, and will help a lot
with testing, too.
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Chutney needs this, to avoid putting every relay in the same family.
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Also use the path_rules name consistently throughout the code.
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To do this at all neatly, I had to split out `tor-config` from
`arti-config` again, and putting the lower level stuff (paths,
builder errors) into tor-config. I also changed our use of
derive_builder to always use a common error type, to avoid
error type proliferation.
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This is a big change, but it does simplify the type of Builder a
little, and isolates locking across different (potential) timeout
estimator types.
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There are some missing parts here (like persistence and tests)
and some incorrect parts (I am 90% sure that the "exploratory
circuit" flag is bogus). Also it is not integrated with the circuit
manager code.
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