nfs-utils: don't use signals to shut down nfs server.

Since Linux v2.4 it has been possible to stop all NFS server by running

   rpc.nfsd 0

i.e.  by requesting that zero threads be running.  This is preferred as
it doesn't risk killing some other process which happens to be called
"nfsd".

Since Linux v6.6 - and other stable kernels to which

  Commit: 390390240145 ("nfsd: don't allow nfsd threads to be
  signalled.")

has been backported - sending a signal no longer works to stop nfs server
threads.

This patch changes the nfsserver script to use "rpc.nfsd 0" to stop
server threads.

(From OE-Core rev: 7b09ad289a36e388ee4244b574ed32b66b654286)

Signed-off-by: NeilBrown <neil@brown.name>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
NeilBrown 2025-05-23 17:41:19 +10:00 committed by Richard Purdie
parent e1e7cde0ee
commit 7c8ab2cee4

View File

@ -89,34 +89,14 @@ start_nfsd(){
start-stop-daemon --start --exec "$NFS_NFSD" -- "$@"
echo done
}
delay_nfsd(){
for delay in 0 1 2 3 4 5 6 7 8 9
do
if pidof nfsd >/dev/null
then
echo -n .
sleep 1
else
return 0
fi
done
return 1
}
stop_nfsd(){
# WARNING: this kills any process with the executable
# name 'nfsd'.
echo -n 'stopping nfsd: '
start-stop-daemon --stop --quiet --signal 1 --name nfsd
if delay_nfsd || {
echo failed
echo ' using signal 9: '
start-stop-daemon --stop --quiet --signal 9 --name nfsd
delay_nfsd
}
$NFS_NFSD 0
if pidof nfsd
then
echo done
else
echo failed
else
echo done
fi
}