Hi all,
...
> Tomorrow I'll test this:
> check_umount()
> {
> local i
> local dir="$1"
> local type="${2:-lhost}"
> local cmd="grep -q $dir /proc/mounts"
> for i in $(seq 50); do
> if [ "$type" = "lhost" ]; then
> $cmd || return
> else
> tst_rhost_run -c "$cmd" || return
> fi
> tst_sleep 100ms
> tst_res TWARN "failed to umount '$dir'"
> done
> }
> for i in $VERSION; do
> local_dir="$(get_local_dir $i $n)"
> grep -q "$local_dir" /proc/mounts && umount $local_dir
> # instead of 'sleep 2' below check here:
> check_umount "$local_dir"
> n=$(( n + 1 ))
> done
> n=0
> for i in $VERSION; do
> type=$(get_socket_type $n)
> remote_dir="$(get_remote_dir $i $type)"
> if tst_net_use_netns; then
> if test -d $remote_dir; then
> exportfs -u *:$remote_dir
> check_umount "$remote_dir" # instead of sleep 1
> rm -rf $remote_dir
> fi
> else
> tst_rhost_run -c "test -d $remote_dir && exportfs -u *:$remote_dir"
> check_umount "$remote_dir" rhost # instead of sleep 1
> tst_rhost_run -c "test -d $remote_dir && rm -rf $remote_dir"
> fi
> n=$(( n + 1 ))
> done
I tried various code (not only the one - wrong - above), but nothing works.
With fuser -vm, I wonder if there is some bug in older nfs versions:
USER PID ACCESS COMMAND
/tmp/LTP_nfs08.fncaxJum2W/mntpoint/4/tcp:
root kernel mount /tmp/LTP_nfs08.fncaxJum2W/mntpoint
root kernel knfsd /tmp/LTP_nfs08.fncaxJum2W/mntpoint/4
Looking at c6c7f2a84da4 ("nfsd: Ensure knfsd shuts down when the "nfsd" pseudofs
is unmounted"), maybe there are other bugs, which causes files are used.
I also tried to use /proc/fs/nfsd/unlock_filesystem and
/proc/fs/nfsd/write_unlock_ip which made things better a bit (6.2.12), but still
it's not 100% solution. Also, "Release all locks on a local file system"
(unlock_filesystem) and Release all locks used by a client (write_unlock_ip) are
unlikely what I'm searching.
umount $local_dir
echo "$local_dir" > /proc/fs/nfsd/unlock_filesystem
# $(tst_ipaddr rhost) => IP of the server
echo "$(tst_ipaddr rhost)" > /proc/fs/nfsd/write_unlock_ip
...
exportfs -u *:$remote_dir
echo "$remote_dir" > /proc/fs/nfsd/unlock_filesystem
=> any hint is welcome.
Kind regards,
Petr
