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guix-daemon: Disable garbage collection for remote connections.

* nix/nix-daemon/nix-daemon.cc (isRemoteConnection): New variable.
  (performOp): For wopCollectGarbage, throw an error when isRemoteConnection
  is set.
  (acceptConnection): Set isRemoteConnection when connection is not AF_UNIX.
* tests/guix-daemon.sh: Add a test for the new behavior.
version-0.15.0
Roel Janssen 4 years ago
parent
commit
5cefb13ddd
No known key found for this signature in database GPG Key ID: C3EC1DCA843072E1
  1. 10
      nix/nix-daemon/nix-daemon.cc
  2. 14
      tests/guix-daemon.sh

10
nix/nix-daemon/nix-daemon.cc

@ -54,7 +54,9 @@ static FdSink to(STDOUT_FILENO);
bool canSendStderr;
/* This variable is used to keep track of whether a connection
comes from a host other than the host running guix-daemon. */
static bool isRemoteConnection;
/* This function is called anytime we want to write something to
stderr. If we're in a state where the protocol allows it (i.e.,
@ -529,6 +531,11 @@ static void performOp(bool trusted, unsigned int clientVersion,
}
case wopCollectGarbage: {
if (isRemoteConnection) {
throw Error("Garbage collection is disabled for remote hosts.");
break;
}
GCOptions options;
options.action = (GCOptions::GCAction) readInt(from);
options.pathsToDelete = readStorePaths<PathSet>(from);
@ -934,6 +941,7 @@ static void acceptConnection(int fdSocket)
connection. Setting these to -1 means: do not change. */
settings.clientUid = clientUid;
settings.clientGid = clientGid;
isRemoteConnection = (remoteAddr.ss_family != AF_UNIX);
/* Handle the connection. */
from.fd = remote;

14
tests/guix-daemon.sh

@ -194,6 +194,20 @@ do
kill "$daemon_pid"
done
# Make sure garbage collection from a TCP connection does not work.
tcp_socket="127.0.0.1:9999"
guix-daemon --listen="$tcp_socket" &
daemon_pid=$!
GUIX_DAEMON_SOCKET="guix://$tcp_socket"
export GUIX_DAEMON_SOCKET
if guix gc; then false; else true; fi
unset GUIX_DAEMON_SOCKET
kill "$daemon_pid"
# Log compression.
guix-daemon --listen="$socket" --disable-chroot --debug --log-compression=gzip &

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