Commit Graph

3036 Commits (618376dbc03d703109c08d6302ade4c509c3cbb4)
 

Author SHA1 Message Date
Josh Bleecher Snyder 618376dbc0 util/codegen: add AssertStructUnchanged
Refactored out from cmd/cloner.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder fb66ff7c78 util/codegen: add package
This is a package for shared utilities used in doing codegen programs.
The inaugural API is for writing gofmt'd code to a file.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Adrian Dewhurst 4da559d7cc control/controlclient: update machine certificate signature version
This iterates on the original signature format.

Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>
3 years ago
Josh Bleecher Snyder a722e48cef wgengine/magicsock: skip alloc test with -race
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 07c09f470d ipn/ipnlocal: do not shut down the backend halfway through TestStateMachine
LocalBackend.Shutdown's docs say:

> The backend can no longer be used after Shutdown returns.

Nevertheless, TestStateMachine blithely calls Shutdown, talks some smack,
and continues on, expecting things to work. Other uses of Shutdown
in the codebase are as intended.

Things mostly kinda work anyway, except that the wgengine.Engine has been
shut down, so calls to Reconfig fail. Those get logged:

> local.go:603: wgengine status error: engine closing; no status

but otherwise ignored.

However, the Reconfig failure caused one fewer call to pause/unpause
than normal. Now the assertCalls lines match the equivalent ones
earlier in the test.

I don't see an obvious correct replacement for Shutdown in the context
of this test; I'm not sure entirely what it is trying to accomplish.
It is possible that many of the tests remaining after the prior call
to Shutdown are now extraneous. They don't harm anything, though,
so err on the side of safety and leave them for now.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder f834a4ade5 ipn/ipnlocal: fix minor typo in comment
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 221cc5f8f2 ipn/ipnlocal: reduce line noise in tests
Use helpers and variadic functions to make the call sites
a lot easier to read, since they occur a lot.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 45d3174c0d ipn/ipnlocal: add LocalBackend.broadcastStatusChanged
To reduce repetition.

Also, document why we acquire the lock.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder b7ede14396 Revert "ipn/ipnlocal: remove locks around sync.Cond.Broadcast call"
Reason for revert: Causes ipnlocal tests to deadlock intermittently.

This reverts commit 1b15349e01.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Brad Fitzpatrick a05086ef86 portlist: add debug knob to disable portlist collection
For big servers. Per discussion with @crawshaw.

Updates tailscale/corp#2566

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 4549d3151c cmd/tailscale: make status show health check problems
Fixes #2775

RELNOTE=tailscale status now shows health check problems

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 73f177e4d5 derp: throttle client sends if server advertises rate limits
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Maxim Merzhanov d43fcd2f02 net/dns: fix error wrapping for SetLinkDefaultRoute in resolved
Signed-off-by: Maxim Merzhanov <maksimmerzh@gmail.com>
3 years ago
Josh Bleecher Snyder 3ea8cf9c62 ipn/ipnlocal: use quicktest.IsNotNil in tests
This didn't exist when the test was written.
Now it does (frankban/quicktest#94); use it.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 1b15349e01 ipn/ipnlocal: remove locks around sync.Cond.Broadcast call
They are unnecessary.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 3b58c118dd ipn/ipnlocal: inline LocalBackend.getEngineStatus
For uniformity.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 0f4c0e558b ipn/ipnlocal: use a switch statement instead of an else-if chain
For clarity.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 7421ba91ec ipn/ipnlocal: only call UpdateEndpoints when the endpoints change
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 5b02ad16b9 control/controlclient: replace TODO with explanation
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder b681edc572 ipn/ipnlocal: add failing test
Concurrent calls to LocalBackend.setWgengineStatus
could result in some of the status updates being dropped.
This was exacerbated by 92077ae78c,
which increases the probability of concurrent status updates,
causing test failures (tailscale/corp#2579).

It's going to take a bit of work to fix this test.
The ipnlocal state machine is difficult to reason about,
particularly in the face of concurrency.
We could fix the test trivially by throwing a new mutex around
setWgengineStatus to serialize calls to it,
but I'd like to at least try to do better than cosmetics.

In the meantime, commit the test.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 7693d36aed all: close fake userspace engines when tests complete
We were leaking FDs.
In a few places, switch from defer to t.Cleanup.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 008f36986e .github/workflows: remove separate "build stringer" step
We now use "go run" instead of compiling stringer separately.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 9faee90744 .github/workflows: skip net/dnsfallback go generate check on release branch
We don't want to force ourselves to update the DERP list
every time we want to cut a new release.
Having an outdated DERP list on release branches is OK.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 4bbf5a8636 cmd/cloner: reduce diff noise when changing command
Spelling out the command to run for every type
means that changing the command makes for a large, repetitive diff.
Stop doing that.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder 865d8c0d23 cmd: upgrade to ffcli v3
None of the breaking changes from v2 to v3 are relevant to us.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Josh Bleecher Snyder a3c5de641b portlist: stop logging stray UDP ports
These "weird" port lines show up in logs frequently.
They're the result of uninteresting races,
and they're not actionable. Remove the noise.

Remove the isLoopbackAddr case to placate staticcheck.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Brad Fitzpatrick a83f08c54b cmd/tailscale: provide a better error message when tailscaled isn't running
Fixes #2797

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 3e2a7de2e9 tailcfg: don't panic on clone of nil RegisterRequest
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick dabeda21e0 net/tstun: block looped disco traffic
Updates #1526 (maybe fixes? time will tell)

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Josh Bleecher Snyder 3759fb8987 derp: deflake TestSendFreeze
On about 1 out of 500 runs, TestSendFreeze failed:

    derp_test.go:416: bob: unexpected message type derp.PeerGoneMessage

Closing alice before bob created a race.
If bob closed promptly, the test passed.
If bob closed slowly, and alice's disappearance caused
bob to receive a PeerGoneMessage before closing, the test failed.

Deflake the test by closing bob first.
With this fix, the test passed 12,000 times locally.

Fixes #2668

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Brad Fitzpatrick 0be26599ca cmd/derper: refactor STUN path for testing, add serverSTUN benchmark
Real goal is to eliminate some allocs in the STUN path, but that requires
work in the standard library.

See comments in #2783.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 0eb6cc9321 portlist: cache field index position between runs, cut two more allocs (Linux)
name          old time/op    new time/op    delta
ParsePorts-6    6.41ms ± 7%    3.15ms ± 2%  -50.84%  (p=0.000 n=9+9)

name          old alloc/op   new alloc/op   delta
ParsePorts-6      408B ± 0%      216B ± 0%  -47.06%  (p=0.002 n=8+10)

name          old allocs/op  new allocs/op  delta
ParsePorts-6      7.00 ± 0%      4.00 ± 0%  -42.86%  (p=0.000 n=10+10)

Updates tailscale/corp#2566

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 61f201f33d portlist: reuse bufio.Reader between files
name         old time/op    new time/op    delta
ListPorts-6    1.18ms ± 5%    1.16ms ± 5%     ~     (p=0.075 n=10+10)

name         old alloc/op   new alloc/op   delta
ListPorts-6    27.2kB ± 0%    14.9kB ± 0%  -45.14%  (p=0.001 n=8+9)

name         old allocs/op  new allocs/op  delta
ListPorts-6      90.0 ± 0%      84.0 ± 0%   -6.67%  (p=0.000 n=10+10)

Updates tailscale/corp#2566

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 5a9d977c78 portlist: reduce CPU parsing portlist
Avoid splitting fields in the common case. Field splitting was 84% of
the overall CPU.

name          old time/op    new time/op    delta
ParsePorts-6    33.3ms ± 2%     6.3ms ± 4%  -80.97%  (p=0.000 n=9+10)

name          old alloc/op   new alloc/op   delta
ParsePorts-6      520B ±79%      408B ± 0%  -21.49%  (p=0.046 n=10+8)

name          old allocs/op  new allocs/op  delta
ParsePorts-6      7.00 ± 0%      7.00 ± 0%     ~     (all equal)

Updates tailscale/corp#2566

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 64e9ce8df1 portlist: reduce allocs on Linux
Notably, it no longer allocates proportional to the number of open
sockets on the machine. Any alloc reduction numbers are a little
contrived with such a reduction but e.g. on a machine with 50,000
connections open:

name          old time/op    new time/op    delta
ParsePorts-6    57.7ms ± 6%    32.8ms ± 3%   -43.04%  (p=0.000 n=9+10)

name          old alloc/op   new alloc/op   delta
ParsePorts-6    24.0MB ± 0%     0.0MB ± 0%  -100.00%  (p=0.000 n=10+9)

name          old allocs/op  new allocs/op  delta
ParsePorts-6      100k ± 0%        0k ± 0%   -99.99%  (p=0.000 n=10+10)

Updates tailscale/corp#2566

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 4f648e6fcc cmd/tailscaled: disable netns earlier in userspace-networking mode
The earlier 382b349c54 was too late,
as engine creation itself needed to listen on things.

Fixes #2827
Updates #2822

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 382b349c54 cmd/tailscaled: disable netns in userspace-networking mode
Updates #2827
Updates #2822

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 31c1331415 wgengine/magicsock: deflake TestReceiveFromAllocs
100 iterations isn't enough with background allocs happening
apparently. 1000 seems to be reliable.

Fixes #2826

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick a353fbd3b4 tstest: make MemLogger.String acquire its mutex
Updates #2781 (might even fix it, but its real issue is that
SetPrivateKey starts a ReSTUN goroutines which then logs, and
that bug and data race existed prior to MemLogger existing)
3 years ago
Brad Fitzpatrick a76c8eea58
api: document new API to authorize a device (#2825)
Fixes #2813

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick d5851d2e06 cmd/derper: fix real staticcheck failure from prior commit
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Silver Bullet d8c5d00ecb
cmd/derper: support manual TLS certificate mode (#2793)
Add a mode control for derp server, and add a "manual" mode
to get derp server certificate. Under manual mode, certificate
is searched in the directory given by "--cert-dir". Certificate
should in PEM format, and use "hostname.{key,crt}" as filename.
If no hostname is used, search by the hostname given for listen.

Fixes #2794

Signed-off-by: SilverBut <SilverBut@users.noreply.github.com>
3 years ago
Brad Fitzpatrick de63e85810 words: remove two plurals, one with a typo
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 12dc7c2df8 net/interfaces: remove stray C header file
I meant to delete it as part of 974be2ec5c
when the darwin code was ported from C to Go.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 2238814b99 wgengine/magicsock: fix crash introduced in recent cleanups
Fixes #2801

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 640134421e all: update tests to use tstest.MemLogger
And give MemLogger a mutex, as one caller had, which does match the logf
contract better.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 48bdffd395 net/portmapper: remove GITHUB_ACTIONS check
It's now redundant.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick cf855e8988 version: bump date
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 48933b0382 ipn/ipnlocal: flesh out the dnsConfigForNetmap tests
Follow-up to #2805 and #2806

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago
Brad Fitzpatrick 7fe6ecf165 ipn/ipnlocal: add MagicDNS records for IPv6-only nodes
Updates #2268

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 years ago