Commit graph

327 commits

Author SHA1 Message Date
John Ericson 242f9bf3dc std::visit by reference
I had started the trend of doing `std::visit` by value (because a type
error once mislead me into thinking that was the only form that
existed). While the optomizer in principle should be able to deal with
extra coppying or extra indirection once the lambdas inlined, sticking
with by reference is the conventional default. I hope this might even
improve performance.
2021-09-30 21:35:09 +00:00
Eelco Dolstra ea9df6fe51 Shut down write side before draining the read side
This is important if the remote side *does* execute
nix-store/nix-daemon successfully, but stdout is polluted
(e.g. because the remote user's bashrc script prints something to
stdout). In that case we have to shutdown the write side to force the
remote nix process to exit.
2021-09-23 18:01:04 +02:00
Eelco Dolstra 994348e9e0 SSHStore / LegacySSHStore: Show a better error message if the remote is "nologin"
Instead of

  error: serialised integer 7161674624452356180 is too large for type 'j'

we now get

  error: 'nix-store --serve' protocol mismatch from 'sshtest@localhost', got 'This account is currently not available.'

Fixes https://github.com/NixOS/nixpkgs/issues/37287.
2021-09-23 17:50:29 +02:00
regnat d9ba3385a9 Don’t send the experimental-features to the daemon
The experimental features are, well, experimental, and shouldn’t be
carelessly and transparently enabled.
Besides, some (`ca-derivations` at least) need to be enabled at startup
in order to work properly.
So it’s better to just require that daemon be started with the right
`experimental-features` option.

Fix #5017
2021-07-30 10:34:50 +02:00
Eelco Dolstra fe1f34fa60 Low-latency closure copy
This adds a new store operation 'addMultipleToStore' that reads a
number of NARs and ValidPathInfos from a Source, allowing any number
of store paths to be copied in a single call. This is much faster on
high-latency links when copying a lot of small files, like .drv
closures.

For example, on a connection with an 50 ms delay:

Before:

  $ nix copy --to 'unix:///tmp/proxy-socket?root=/tmp/dest-chroot' \
    /nix/store/90jjw94xiyg5drj70whm9yll6xjj0ca9-hello-2.10.drv \
    --derivation --no-check-sigs
  real    0m57.868s
  user    0m0.103s
  sys     0m0.056s

After:

  real    0m0.690s
  user    0m0.017s
  sys     0m0.011s
2021-07-26 13:31:09 +02:00
Eelco Dolstra 9957315ce0 RemoteStore::buildPaths(): Handle evalStore 2021-07-22 22:50:48 +02:00
Eelco Dolstra eb6db4fd38 buildPaths(): Add an evalStore argument
With this, we don't have to copy the entire .drv closure to the
destination store ahead of time (or at all). Instead, buildPaths()
reads .drv files from the eval store and copies inputSrcs to the
destination store if it needs to build a derivation.

Issue #5025.
2021-07-22 09:59:51 +02:00
Eelco Dolstra 3d9de41a5b Hacky fast closure copying mechanism 2021-07-22 09:59:51 +02:00
regnat a8416866cf Always send the realisations as JSON
Align all the worker protocol with `buildDerivation` which inlines the
realisations as one opaque json blob.
That way we don’t have to bother changing the remote store protocol
when the definition of `Realisation` changes, as long as we keep the
json backwards-compatible
2021-05-19 11:45:16 +02:00
Maximilian Bosch e5951a6b2f
Bump version number for DerivedPath changes
I guess I misunderstood John's initial explanation about why wildcards
for outputs are sent to older stores[1]. My `nix-daemon` from 2021-03-26
also has version 1.29, but misses the wildcard[2]. So bumping seems to
be the right call.

[1] https://github.com/NixOS/nix/pull/4759#issuecomment-830812464
[2] 255d145ba7
2021-05-03 01:12:23 +02:00
John Ericson 9b805d36ac Rename Buildable 2021-04-05 09:52:25 -04:00
John Ericson 9dfb97c987 "newtype" BuildableReq
This makes for better types errors and allows us to give it methods.
2021-04-05 09:35:55 -04:00
John Ericson 255d145ba7 Use BuildableReq for buildPaths and ensurePath
This avoids an ambiguity where the `StorePathWithOutputs { drvPath, {}
}` could mean "build `brvPath`" or "substitute `drvPath`" depending on
context.

It also brings the internals closer in line to the new CLI, by
generalizing the `Buildable` type is used there and makes that
distinction already.

In doing so, relegate `StorePathWithOutputs` to being a type just for
backwards compatibility (CLI and RPC).
2021-04-05 08:33:00 -04:00
John Ericson f44206e719 Fix typos in the last PR #4656 2021-03-22 15:18:48 +00:00
John Ericson 9d309de0de Clean up serialization for BuildResult
A few versioning mistakes were corrected:

- In 27b5747ca7, Daemon protocol had some
  version `>= 0xc` that should have been `>= 0x1c`, or `28` since the
  other conditions used decimal.

- In a2b69660a9, legacy SSH gated new CAS
  info on version 6, but version 5 in the server. It is now 6
  everywhere.

Additionally, legacy ssh was sending over more metadata than the daemon
one was. The daemon now sends that data too.

CC @regnat

Co-authored-by: Cole Helbling <cole.e.helbling@outlook.com>
2021-03-22 14:57:41 +00:00
regnat 27b5747ca7 RemoteStore: Send back the new realisations
To allow it to build ca derivations remotely
2021-02-23 08:04:03 +01:00
regnat 6fbf3fe636 Make the build-hook work with ca derivations
- Pass it the name of the outputs rather than their output paths (as
  these don't exist for ca derivations)
- Get the built output paths from the remote builder
- Register the new received realisations
2021-02-23 08:04:03 +01:00
John Ericson 1a1af75338 Overhaul store subclassing
We embrace virtual the rest of the way, and get rid of the
`assert(false)` 0-param constructors.

We also list config base classes first, so the constructor order is
always:

  1. all the configs
  2. all the stores

Each in the same order
2020-12-20 15:47:14 +00:00
regnat 58cdab64ac Store metadata about drv outputs realisations
For each known realisation, store:
- its output
- its output path

This comes with a set of needed changes:

- New `realisations` module declaring the types needed for describing
  these mappings
- New `Store::registerDrvOutput` method registering all the needed informations
  about a derivation output (also replaces `LocalStore::linkDeriverToPath`)
- new `Store::queryRealisation` method to retrieve the informations for a
  derivations

This introcudes some redundancy on the remote-store side between
`wopQueryDerivationOutputMap` and `wopQueryRealisation`.
However we might need to keep both (regardless of backwards compat)
because we sometimes need to get some infos for all the outputs of a
derivation (where `wopQueryDerivationOutputMap` is handy), but all the
stores can't implement it − because listing all the outputs of a
derivation isn't really possible for binary caches where the server
doesn't allow to list a directory.
2020-12-11 20:41:32 +01:00
Eelco Dolstra 1b79b5b983 read(): Use char * instead of unsigned char *
This gets rid of some pointless casts.
2020-12-02 14:17:27 +01:00
Eelco Dolstra faa31f4084 Sink: Use std::string_view 2020-12-02 14:17:27 +01:00
Eelco Dolstra df5c69a94e
Merge pull request #4180 from Ma27/ssh-ng-substitute
Allow substituting paths when building remotely using `ssh-ng://`
2020-11-17 14:01:04 +01:00
Jake Waksbaum 01db455733 Fix deadlock in nix-store when max-connections=1
This fixes a bug I encountered where `nix-store -qR` will deadlock when
the `--include-outputs` flag is passed and `max-connections=1`.

The deadlock occurs because `RemoteStore::queryDerivationOutputs` takes
the only connection from the connection pool and uses it to check the
daemon version. If the version is new enough, it calls
`Store::queryDerivationOutputs`, which eventually calls
`RemoteStore::queryPartialDerivationOutputMap`, where we take another
connection from the connection pool to check the version again. Because
we still haven't released the connection from the caller, this waits for
a connection to be available, causing a deadlock.

This diff solves the issue by using `getProtocol` to check the protocol
version in the caller `RemoteStore::queryDerivationOutputs`, which
immediately frees the connection back to the pool before returning the
protocol version. That way we've already freed the connection by the
time we call `RemoteStore::queryPartialDerivationOutputMap`.
2020-11-16 02:35:50 -05:00
Maximilian Bosch 3a63fc6cd5
Allow substituting paths when building remotely using ssh-ng://
Until now, it was not possible to substitute missing paths from e.g.
`https://cache.nixos.org` on a remote server when building on it using
the new `ssh-ng` protocol.

This is because every store implementation except legacy `ssh://`
ignores the substitution flag passed to `Store::queryValidPaths` while
the `legacy-ssh-store` substitutes the remote store using
`cmdQueryValidPaths` when the remote store is opened with `nix-store
--serve`.

This patch slightly modifies the daemon protocol to allow passing an
integer value suggesting whether to substitute missing paths during
`wopQueryValidPaths`. To implement this on the daemon-side, the
substitution logic from `nix-store --serve` has been moved into a
protected method named `Store::substitutePaths` which gets currently
called from `LocalStore::queryValidPaths` and `Store::queryValidPaths`
if `maybeSubstitute` is `true`.

Fixes #2770
2020-11-05 20:12:37 +01:00
Eelco Dolstra ab2ef851b6
Merge pull request #4207 from hercules-ci/fix-RemoteStore-filterSource-deadlock
Fix RemoteStore pool deadlock in filterSource etc
2020-11-02 14:46:10 +01:00
Eelco Dolstra db5424bf09 Don't send eval-related settings to the daemon 2020-11-02 13:57:58 +01:00
Robert Hensing 2192cac634 Fix RemoteStore pool deadlock in filterSource etc 2020-10-30 21:47:34 +01:00
John Ericson 15fdb7cc6b Split out uds-remote-store.{cc.hh} 2020-10-11 17:37:05 +00:00
Eelco Dolstra c43e882f54 Serialize exceptions from the daemon to the client 2020-10-07 17:13:54 +02:00
Eelco Dolstra 85c8be6286 Remove static variable name clashes
This was useful for an experiment with building Nix as a single
compilation unit. It's not very useful otherwise but also doesn't
hurt...
2020-10-06 13:49:20 +02:00
John Ericson b759701652 nix::worker_proto -> worker_proto 2020-09-30 00:41:18 +00:00
John Ericson 45a0ed82f0 Revert "Use template structs instead of phantoms"
This reverts commit 9ab07e99f5.
2020-09-30 00:39:06 +00:00
John Ericson e9fc2031f0 Merge remote-tracking branch 'upstream/master' into templated-daemon-protocol 2020-09-22 14:18:31 +00:00
Eelco Dolstra 980edd1f3a RemoteStore::addCAToStore(): Don't hold connection while calling queryPathInfo()
This leads to a deadlock if we're at the connection limit.
2020-09-22 15:28:20 +02:00
Eelco Dolstra 35a0ac1838 Style fixes 2020-09-22 11:40:19 +02:00
Eelco Dolstra 92ac8df0ec Merge branch 'add-ca-to-store' of https://github.com/hercules-ci/nix 2020-09-22 11:31:33 +02:00
John Ericson b92d3b2edd Merge remote-tracking branch 'upstream/master' into templated-daemon-protocol 2020-09-22 00:45:55 +00:00
Eelco Dolstra d51ba43047 Move Callback into its own header
This gets rid of the inclusion of <future> in util.hh, cutting
compilation time by ~20s (CPU time).

Issue #4045.
2020-09-21 18:42:21 +02:00
Robert Hensing fa08db5c4c wopAddToStore: return ValidPathInfo
A ValidPathInfo is created anyway. By returning it we can save a
roundtrip and we have a nicer interface.
2020-09-21 07:55:47 +02:00
Robert Hensing 7c68264085 wopAddToStore: add RepairFlag 2020-09-21 07:55:47 +02:00
Robert Hensing 8279178b07 Move FramedSink next to FramedSource 2020-09-21 07:55:47 +02:00
Robert Hensing c602ebfb34 Refactor wopAddToStore to make wopAddTextToStore obsolete 2020-09-21 07:55:45 +02:00
Robert Hensing e34fe47d0c Overhaul wopAddToStore 2020-09-21 07:54:05 +02:00
Robert Hensing 14b30b3f3d Move FramedSource and FramedSink, extract withFramedSink 2020-09-17 20:21:04 +02:00
John Ericson f60b380a7f Merge remote-tracking branch 'upstream/master' into remove-storetype-delegate-regStore 2020-09-16 22:35:24 +00:00
regnat 888f7afe9f Fix build issues with gcc 2020-09-16 13:53:09 +02:00
regnat f24f0888f9 Document the new store hierarchy 2020-09-16 13:53:09 +02:00
regnat 7f103dcddd Properly filter the stores according to their declared uriSchemes
When opening a store, only try the stores whose `uriSchemes()` include
the current one
2020-09-16 13:53:09 +02:00
regnat 5895184df4 Correctly call all the parent contructors of the stores
Using virtual inheritance means that only the default constructors of
the parent classes will be called, which isn't what we want
2020-09-16 13:53:09 +02:00
regnat 22afa8fb4d Separate store configs from the implems
Rework the `Store` hierarchy so that there's now one hierarchy for the
store configs and one for the implementations (where each implementation
extends the corresponding config). So a class hierarchy like

```
StoreConfig-------->Store
    |                 |
    v                 v
SubStoreConfig----->SubStore
    |                 |
    v                 v
SubSubStoreConfig-->SubSubStore
```

(with virtual inheritance to prevent DDD).

The advantage of this architecture is that we can now introspect the configuration of a store without having to instantiate the store itself
2020-09-16 13:53:08 +02:00