Commit Graph

5641 Commits (7c386ca6d27fc76f8e9608b19067c5d32e068ad5)
 

Author SHA1 Message Date
Will Norris 7c386ca6d2 net/sockstats: fix calculation of radio power usage
When splitting the radio monitor usage array, we were splitting at now %
3600 to get values into chronological order.  This caused the value for
the final second to be included at the beginning of the ordered slice
rather than the end.  If there was activity during that final second, an
extra five seconds of high power usage would get recorded in some cases.
This could result in a final calculation of greater than 100% usage.

This corrects that by splitting values at (now+1 % 3600).

This also simplifies the percentage calculation by always rounding
values down, which is sufficient for our usage.

Signed-off-by: Will Norris <will@tailscale.com>
2 years ago
License Updater 7f057d7489 licenses: update tailscale{,d} licenses
Signed-off-by: License Updater <noreply@tailscale.com>
2 years ago
Mihai Parparita c7cea825ae net/netns: don't log errors when we can't get the default route on Darwin
It's somewhat common (e.g. when a phone has no reception), and leads to
lots of logspam.

Updates #7850

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
2 years ago
Andrew Dunham 280255acae
various: add golangci-lint, fix issues (#7905)
This adds an initial and intentionally minimal configuration for
golang-ci, fixes the issues reported, and adds a GitHub Action to check
new pull requests against this linter configuration.

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I8f38fbc315836a19a094d0d3e986758b9313f163
2 years ago
Joe Tsai ff1b35ec6c
net/connstats: exclude traffic with internal Tailscale service (#7904)
Exclude traffic with 100.100.100.100 (for IPv4) and
with fd7a:115c:a1e0::53 (for IPv6) since this traffic with the
Tailscale service running locally on the node.
This traffic never left the node.

It also happens to be a high volume amount of traffic since
DNS requests occur over UDP with each request coming from a
unique port, thus resulting in many discrete traffic flows.

Fixes tailscale/corp#10554

Signed-off-by: Joe Tsai <joetsai@digital-static.net>
2 years ago
Mihai Parparita 9a655a1d58 net/dnsfallback: more explicitly pass through logf function
Redoes the approach from #5550 and #7539 to explicitly pass in the logf
function, instead of having global state that can be overridden.

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
2 years ago
dependabot[bot] 28cb1221ba .github: Bump actions/setup-go from 3 to 4
Bumps [actions/setup-go](https://github.com/actions/setup-go) from 3 to 4.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](https://github.com/actions/setup-go/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/setup-go
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
2 years ago
Brad Fitzpatrick d5a870b4dc wgengine/monitor: add --monitor-duration flag to opt-in TestMonitorMode
TestMonitorMode skips by default, without the --monitor flag, and then
it previously ran forever. This adds an option --monitor-duration flag
that defaults to zero (run forever) but if non-zero bounds how long
the tests runs. This means you can then also use e.g. `go test
--cpuprofile` and capture a CPU/mem profile for a minute or two.

Updates #7621

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2 years ago
Brad Fitzpatrick 162488a775 net/interfaces: cache "home" router lookup on big Linux routers
This is a continuation of the earlier 2a67beaacf but more aggressive;
this now remembers that we failed to find the "home" router IP so we
don't try again later on the next call.

Updates #7621

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2 years ago
James Tucker c5150eae67 net/netcheck: reenable TestNodeAddrResolve on Windows
Updates #7876

Co-authored-by: Andrew Dunham <andrew@du.nham.ca>
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Signed-off-by: James Tucker <james@tailscale.com>
Change-Id: Idb2e6cc2edf6ca123b751d6c8f8729b0cba86023
2 years ago
Andrew Dunham 80b138f0df wgengine/magicsock: keep advertising endpoints after we stop discovering them
Previously, when updating endpoints we would immediately stop
advertising any endpoint that wasn't discovered during
determineEndpoints. This could result in, for example, a case where we
performed an incremental netcheck, didn't get any of our three STUN
packets back, and then dropped our STUN endpoint from the set of
advertised endpoints... which would result in clients falling back to a
DERP connection until the next call to determineEndpoints.

Instead, let's cache endpoints that we've discovered and continue
reporting them to clients until a timeout expires. In the above case
where we temporarily don't have a discovered STUN endpoint, we would
continue reporting the old value, then re-discover the STUN endpoint
again and continue reporting it as normal, so clients never see a
withdrawal.

Updates tailscale/coral#108

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I42de72e7418ab328a6c732bdefc74549708cf8b9
2 years ago
Brad Fitzpatrick 4b49ca4a12 wgengine/magicsock: update comments on what implements conn.Bind
The comment still said *magicsock.Conn implemented wireguard-go conn.Bind.
That wasn't accurate anymore.

A doc #cleanup.

Change-Id: I7fd003b939497889cc81147bfb937b93e4f6865c
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2 years ago
Brad Fitzpatrick 10f1c90f4d wgengine/magicsock, types/nettype, etc: finish ReadFromUDPAddrPort netip migration
So we're staying within the netip.Addr/AddrPort consistently and
avoiding allocs/conversions to the legacy net addr types.

Updates #5162

Change-Id: I59feba60d3de39f773e68292d759766bac98c917
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2 years ago
Brad Fitzpatrick 29f7df9d8f wgengine/magicsock, etc: remove mostly unused WriteTo methods
Updates #2331
Updates #5162

Change-Id: I8291884425481eeaedde38a54adfd8ed7292a497
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2 years ago
Brad Fitzpatrick 83c41f3697 net/netcheck: remove unused method from interface
Updates #2331
Updates #5162

Change-Id: I77ff956c2d59bde611d47523659a07afb4a6da2d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2 years ago
James Tucker 20f17d6e7b wgengine/magicsock: reenable magicsock tests on Windows
These tests are passing locally and on CI. They had failed earlier in
the day when first fixing up CI, and it is not immediately clear why. I
have cycled IPv6 support locally, but this should not have a substantial
effect.

Updates #7876

Signed-off-by: James Tucker <jftucker@gmail.com>
2 years ago
James Tucker bd0c32ca21 tsnet: disable TestLoopbackSOCKS5 on Windows
This test is not regularly passing on CI, but seems to pass reliably
locally. Needs deeper debugging.

Updates #7876

Signed-off-by: James Tucker <jftucker@gmail.com>
2 years ago
James Tucker b7f51a1468 .github/workflows: add artifact caching and remove double build on race
Go artifact caching will help provided that the cache remains small
enough - we can reuse the strategy from the Windows build where we only
cache and pull the zips, but let go(1) do the many-file unpacking as it
does so faster.

The race matrix was building once without race, then running all the
tests with race, so change the matrix to incldue a `buildflags`
parameter and use that both in the build and test steps.

Updates #cleanup

Signed-off-by: James Tucker <james@tailscale.com>
2 years ago
Andrew Dunham f352f8a0e6 util/set: move Slice type from corp to oss
This is an exact copy of the files misc/set/set{,_test}.go from
tailscale/corp@a5415daa9c, plus the
license headers.

For use in #7877

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I712d09c6d1a180c6633abe3acf8feb59b27e2866
2 years ago
James Tucker 8dec1a8724 .github/workflows: reenable Windows CI, disable broken tests
We accidentally switched to ./tool/go in
4022796484 which resulted in no longer
running Windows builds, as this is attempting to run a bash script.

I was unable to quickly fix the various tests that have regressed, so
instead I've added skips referencing #7876, which we need to back and
fix.

Updates #7262
Updates #7876

Signed-off-by: James Tucker <james@tailscale.com>
2 years ago
Will Norris 4ecc7fdf5f api.md: update example auth key value
example was missing the "-auth" type in the key prefix, which all new
keys now contain.  Also update key ID to match the full key, and fix
indenting of closing braces.

Signed-off-by: Will Norris <will@tailscale.com>
2 years ago
Brad Fitzpatrick 6866aaeab3 wgengine/magicsock: factor out receiveIPv4 & receiveIPv6 common code
Updates #2331

Change-Id: I801df38b217f5d17203e8dc3b8654f44747e0f4b
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2 years ago
Brad Fitzpatrick c889254b42 net/art: skip tests on CI for now
To get the tree green again for other people.

Updates #7866

Change-Id: Ibdad2e1408e5f0c97e49a148bfd77aad17c2c5e5
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2 years ago
Andrew Dunham 228d0c6aea net/netcheck: use dnscache.Resolver when resolving DERP IPs
This also adds a bunch of tests for this function to ensure that we're
returning the proper IP(s) in all cases.

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I0d9d57170dbab5f2bf07abdf78ecd17e0e635399
2 years ago
Maisem Ali 64bbf1738e tailcfg: make SelfNodeV4MasqAddrForThisPeer a pointer
This makes `omitempty` actually work, and saves bytes in each map response.

Updates tailscale/corp#8020

Signed-off-by: Maisem Ali <maisem@tailscale.com>
2 years ago
David Anderson a5fd51ebdc net/art: disable the IPv6 100k routes benchmark.
At the current unoptimized memory utilization of the various data structures,
100k IPv6 routes consumes in the ballpark of 3-4GiB, which risks OOMing our
386 test machine.

Until we have the optimizations to (drastically) reduce that consumption,
skip the test that bloats too much for 32-bit machines.

Signed-off-by: David Anderson <danderson@tailscale.com>
2 years ago
David Anderson a7c910e361 net/art: implement the Table type, a multi-level art route table.
Updates #7781

                           │    sec/op     │
TableInsertion/ipv4/10       1.562µ ±   2%
TableInsertion/ipv4/100      2.398µ ±   5%
TableInsertion/ipv4/1000     2.097µ ±   3%
TableInsertion/ipv4/10000    2.756µ ±   4%
TableInsertion/ipv4/100000   2.473µ ±  13%
TableInsertion/ipv6/10       7.649µ ±   2%
TableInsertion/ipv6/100      12.09µ ±   3%
TableInsertion/ipv6/1000     14.84µ ±   5%
TableInsertion/ipv6/10000    14.72µ ±   8%
TableInsertion/ipv6/100000   13.23µ ±  41%
TableDelete/ipv4/10          378.4n ±   5%
TableDelete/ipv4/100         366.9n ±   3%
TableDelete/ipv4/1000        418.6n ±   3%
TableDelete/ipv4/10000       609.2n ±  11%
TableDelete/ipv4/100000      679.2n ±  28%
TableDelete/ipv6/10          504.2n ±   4%
TableDelete/ipv6/100         959.5n ±  12%
TableDelete/ipv6/1000        1.436µ ±   6%
TableDelete/ipv6/10000       1.772µ ±  15%
TableDelete/ipv6/100000      1.172µ ± 113%
TableGet/ipv4/10             32.14n ±  11%
TableGet/ipv4/100            38.58n ±   2%
TableGet/ipv4/1000           45.03n ±   2%
TableGet/ipv4/10000          52.90n ±   7%
TableGet/ipv4/100000         135.2n ±  11%
TableGet/ipv6/10             41.55n ±   1%
TableGet/ipv6/100            44.78n ±   2%
TableGet/ipv6/1000           49.03n ±   2%
TableGet/ipv6/10000          65.38n ±   5%
TableGet/ipv6/100000         525.0n ±  39%

                           │   avg-B/op   │
TableInsertion/ipv4/10       25.18Ki ± 0%
TableInsertion/ipv4/100      17.63Ki ± 0%
TableInsertion/ipv4/1000     14.14Ki ± 0%
TableInsertion/ipv4/10000    12.92Ki ± 0%
TableInsertion/ipv4/100000   11.13Ki ± 0%
TableInsertion/ipv6/10       76.87Ki ± 0%
TableInsertion/ipv6/100      98.33Ki ± 0%
TableInsertion/ipv6/1000     91.44Ki ± 0%
TableInsertion/ipv6/10000    90.39Ki ± 0%
TableInsertion/ipv6/100000   87.19Ki ± 0%
TableDelete/ipv4/10            3.230 ± 0%
TableDelete/ipv4/100           4.020 ± 0%
TableDelete/ipv4/1000          3.990 ± 0%
TableDelete/ipv4/10000         4.000 ± 0%
TableDelete/ipv4/100000        4.000 ± 0%
TableDelete/ipv6/10            16.00 ± 0%
TableDelete/ipv6/100           16.00 ± 0%
TableDelete/ipv6/1000          16.00 ± 0%
TableDelete/ipv6/10000         16.00 ± 0%
TableDelete/ipv6/100000        16.00 ± 0%

                           │ avg-allocs/op │
TableInsertion/ipv4/10          2.900 ± 0%
TableInsertion/ipv4/100         2.330 ± 0%
TableInsertion/ipv4/1000        2.070 ± 0%
TableInsertion/ipv4/10000       1.980 ± 0%
TableInsertion/ipv4/100000      1.840 ± 0%
TableInsertion/ipv6/10          6.800 ± 0%
TableInsertion/ipv6/100         8.420 ± 0%
TableInsertion/ipv6/1000        7.900 ± 0%
TableInsertion/ipv6/10000       7.820 ± 0%
TableInsertion/ipv6/100000      7.580 ± 0%
TableDelete/ipv4/10             1.000 ± 0%
TableDelete/ipv4/100            1.000 ± 0%
TableDelete/ipv4/1000           1.000 ± 0%
TableDelete/ipv4/10000          1.000 ± 0%
TableDelete/ipv4/100000         1.000 ± 0%
TableDelete/ipv6/10             1.000 ± 0%
TableDelete/ipv6/100            1.000 ± 0%
TableDelete/ipv6/1000           1.000 ± 0%
TableDelete/ipv6/10000          1.000 ± 0%
TableDelete/ipv6/100000         1.000 ± 0%

                           │   routes/s   │
TableInsertion/ipv4/10       640.3k ±  2%
TableInsertion/ipv4/100      417.1k ±  5%
TableInsertion/ipv4/1000     477.0k ±  3%
TableInsertion/ipv4/10000    362.8k ±  5%
TableInsertion/ipv4/100000   404.5k ± 15%
TableInsertion/ipv6/10       130.7k ±  1%
TableInsertion/ipv6/100      82.69k ±  3%
TableInsertion/ipv6/1000     67.37k ±  5%
TableInsertion/ipv6/10000    67.93k ±  9%
TableInsertion/ipv6/100000   75.63k ± 29%
TableDelete/ipv4/10          2.642M ±  6%
TableDelete/ipv4/100         2.726M ±  3%
TableDelete/ipv4/1000        2.389M ±  3%
TableDelete/ipv4/10000       1.641M ± 12%
TableDelete/ipv4/100000      1.472M ± 27%
TableDelete/ipv6/10          1.984M ±  4%
TableDelete/ipv6/100         1.042M ± 11%
TableDelete/ipv6/1000        696.5k ±  6%
TableDelete/ipv6/10000       564.4k ± 13%
TableDelete/ipv6/100000      853.6k ± 53%

                     │   addrs/s    │
TableGet/ipv4/10       31.11M ± 10%
TableGet/ipv4/100      25.92M ±  2%
TableGet/ipv4/1000     22.21M ±  2%
TableGet/ipv4/10000    18.91M ±  8%
TableGet/ipv4/100000   7.397M ± 12%
TableGet/ipv6/10       24.07M ±  1%
TableGet/ipv6/100      22.33M ±  2%
TableGet/ipv6/1000     20.40M ±  2%
TableGet/ipv6/10000    15.30M ±  5%
TableGet/ipv6/100000   1.905M ± 28%

                     │    B/op    │
TableGet/ipv4/10       4.000 ± 0%
TableGet/ipv4/100      4.000 ± 0%
TableGet/ipv4/1000     4.000 ± 0%
TableGet/ipv4/10000    4.000 ± 0%
TableGet/ipv4/100000   4.000 ± 0%
TableGet/ipv6/10       16.00 ± 0%
TableGet/ipv6/100      16.00 ± 0%
TableGet/ipv6/1000     16.00 ± 0%
TableGet/ipv6/10000    16.00 ± 0%
TableGet/ipv6/100000   16.00 ± 0%

                     │ allocs/op  │
TableGet/ipv4/10       1.000 ± 0%
TableGet/ipv4/100      1.000 ± 0%
TableGet/ipv4/1000     1.000 ± 0%
TableGet/ipv4/10000    1.000 ± 0%
TableGet/ipv4/100000   1.000 ± 0%
TableGet/ipv6/10       1.000 ± 0%
TableGet/ipv6/100      1.000 ± 0%
TableGet/ipv6/1000     1.000 ± 0%
TableGet/ipv6/10000    1.000 ± 0%
TableGet/ipv6/100000   1.000 ± 0%

Signed-off-by: David Anderson <danderson@tailscale.com>
2 years ago
Mihai Parparita edb02b63f8 net/sockstats: pass in logger to sockstats.WithSockStats
Using log.Printf may end up being printed out to the console, which
is not desirable. I noticed this when I was investigating some client
logs with `sockstats: trace "NetcheckClient" was overwritten by another`.
That turns to be harmless/expected (the netcheck client will fall back
to the DERP client in some cases, which does its own sockstats trace).

However, the log output could be visible to users if running the
`tailscale netcheck` CLI command, which would be needlessly confusing.

Updates tailscale/corp#9230

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
2 years ago
Mihai Parparita 782ccb5655 .github/workflows: run one set of tests with the tailscale_go build tag
We use it to gate code that depends on custom Go toolchain, but it's
currently only passed in the corp runners. Add a set on OSS so that we
can catch regressions earlier.

To specifically test sockstats this required adding a build tag to
explicitly enable them -- they're normally on for iOS, macOS and Android
only, and we don't run tests on those platforms normally.

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
2 years ago
Will Norris bb34589748 log/sockstatlog: limit sockstat logs to 5 MB
Updates tailscale/corp#9230

Signed-off-by: Will Norris <will@tailscale.com>
2 years ago
Brad Fitzpatrick 9e50da321b client/tailscale: dial LocalAPI at 127.0.0.1 on macOS
Updates #7851

Change-Id: Ib53cf53cdfee277ef42f7833352bc51ecb5db959
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2 years ago
Mihai Parparita bdc7a61c24 tool/gocross: add ts_macext build tag for Xcode builds
It's used to control various opt-in functionality for the macOS and iOS
apps, and was lost in the migration to gocross.

Updates tailscale/tailscale#7769

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
2 years ago
License Updater 33b006cacf licenses: update tailscale{,d} licenses
Signed-off-by: License Updater <noreply@tailscale.com>
2 years ago
License Updater e5d272f445 licenses: update win/apple licenses
Signed-off-by: License Updater <noreply+license-updater@tailscale.com>
2 years ago
Flakes Updater 7c95734907 go.mod.sri: update SRI hash for go.mod changes
Signed-off-by: Flakes Updater <noreply@tailscale.com>
2 years ago
Anton Tolchanov 8546ff98fb tsweb: move varz handler(s) into separate modules
This splits Prometheus metric handlers exposed by tsweb into two
modules:
- `varz.Handler` exposes Prometheus metrics generated by our expvar
  converter;
- `promvarz.Handler` combines our expvar-converted metrics and native
  Prometheus metrics.

By default, tsweb will use the promvarz handler, however users can keep
using only the expvar converter. Specifically, `tailscaled` now uses
`varz.Handler` explicitly, which avoids a dependency on the
(heavyweight) Prometheus client.

Updates https://github.com/tailscale/corp/issues/10205

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2 years ago
Anton Tolchanov c153e6ae2f prober: migrate to Prometheus metric library
This provides an example of using native Prometheus metrics with tsweb.

Prober library seems to be the only user of PrometheusVar, so I am
removing support for it in tsweb.

Updates https://github.com/tailscale/corp/issues/10205

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2 years ago
Anton Tolchanov 11e6247d2a tsweb: expose native Prometheus metrics in /debug/varz
The handler will expose built-in process and Go metrics by default,
which currently duplicate some of the expvar-proxied metrics
(`goroutines` vs `go_goroutines`, `memstats` vs `go_memstats`), but as
long as their names are different, Prometheus server will just scrape
both.

This will change /debug/varz behaviour for most tsweb binaries, but
notably not for control, which configures a `tsweb.VarzHandler`
[explicitly](a5b5d5167f/cmd/tailcontrol/tailcontrol.go (L779))

Updates https://github.com/tailscale/corp/issues/10205

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2 years ago
License Updater 690446c784 licenses: update android licenses
Signed-off-by: License Updater <noreply@tailscale.com>
2 years ago
Mihai Parparita cef0a474f8 ipn/ipnlocal: check that sockstatLogger is available in c2n endpoint
Otherwise there may be a panic if it's nil (and the control side of
the c2n call will just time out).

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
2 years ago
Mihai Parparita 03b2c44a21 ipn/ipnlocal: more explicitly say if sockstats are not available
Makes it more apparent in the PeerAPI endpoint that the client was
not built with the appropriate toolchain or build tags.

Updates tailscale/corp#9230

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
2 years ago
Flakes Updater 1bec2cbbd5 go.mod.sri: update SRI hash for go.mod changes
Signed-off-by: Flakes Updater <noreply@tailscale.com>
2 years ago
Jordan Whited f571536598
go.mod: bump wireguard-go (#7836)
This pulls in a synchronization optimization, see
tailscale/wireguard-go@af17262.

Updates tailscale/corp#8734

Signed-off-by: Jordan Whited <jordan@tailscale.com>
2 years ago
James Tucker e09c434e5d wgengine/magicsock: remove locking sync requirements on conn disco keys
The lazy initialization of the disco key is not necessary, and
contributes to unnecessary locking and state checking.

Updates #cleanup

Signed-off-by: James Tucker <james@tailscale.com>
2 years ago
James Tucker e1b71c83ac wgengine/magicsock: remove unused fields on discoInfo
Updates #cleanup

Signed-off-by: James Tucker <james@tailscale.com>
2 years ago
James Tucker a257b2f88b wgengine/magicsock: add immutability documentation to endpointDisco
Updates #7825

Signed-off-by: James Tucker <james@tailscale.com>
2 years ago
James Tucker fb18af5564 wgengine/netstack: fix data-race on startup
Running tailscaled with the race detector enabled immediately fires on
this field, as it is updated after first read.

Updates #cleanup

Signed-off-by: James Tucker <james@tailscale.com>
2 years ago
Charlotte Brandhorst-Satzkorn c573bef0aa tailcfg,wgengine: add initial support for WireGuard only peers
A peer can have IsWireGuardOnly, which means it will not support DERP or
Disco, and it must have Endpoints filled in order to be usable.

In the present implementation only the first Endpoint will be used as
the bestAddr.

Updates tailscale/corp#10351

Co-authored-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>
Co-authored-by: James Tucker <james@tailscale.com>
Signed-off-by: James Tucker <james@tailscale.com>
2 years ago
James Tucker 6cfcb3cae4 wgengine/magicsock: fix synchronization of endpoint disco fields
Identified in review in #7821 endpoint.discoKey and endpoint.discoShort
are often accessed without first taking endpoint.mu. The arrangement
with endpoint.mu is inconvenient for a good number of those call-sites,
so it is instead replaced with an atomic pointer to carry both pieces of
disco info. This will also help with #7821 that wants to add explicit
checks/guards to disable disco behaviors when disco keys are missing
which is necessarily implicitly mostly covered by this change.

Updates #7821

Signed-off-by: James Tucker <james@tailscale.com>
2 years ago
Mihai Parparita e978299bf0 net/sockstats: disable deltas for the cell radio power state metric
Updates tailscale/corp#9230

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
2 years ago