Hi,everyone. I found a big bug abount nfs cache. when server delete the file ,nfs client can read file also. the following is the reproduce. ip: 192.168.0.19 nfs-client ip: 192.168.0.20 nfs-client ip: 192.168.0.21 nfs-server ############################################################################ /usr/bin/ssh -n 192.168.0.21 service nfs start /usr/bin/ssh -n 192.168.0.21 /usr/sbin/rpc.idmapd /usr/bin/ssh -n 192.168.0.19 /usr/sbin/rpc.idmapd /usr/bin/ssh -n 192.168.0.20 /usr/sbin/rpc.idmapd /usr/bin/ssh -n 192.168.0.21 "rm -rf /nfsroot; mkdir -p /nfsroot" /usr/bin/ssh -n 192.168.0.21 /usr/sbin/exportfs -au /usr/bin/ssh -n 192.168.0.21 /usr/sbin/exportfs -i -o insecure,no_root_squash,rw,fsid=0 *:/nfsroot /usr/bin/ssh -n 192.168.0.19 test -d /nfsroot || (rm -rf /nfsroot; mkdir -p /nfsroot) /usr/bin/ssh -n 192.168.0.20 test -d /nfsroot || (rm -rf /nfsroot; mkdir -p /nfsroot) /usr/bin/ssh -n 192.168.0.19 umount /nfsroot /usr/bin/ssh -n 192.168.0.20 umount /nfsroot cmd="echo \"hello world\" > /nfsroot/tmpfile" /usr/bin/ssh -n 192.168.0.21 $cmd /usr/bin/ssh -n 192.168.0.21 mkdir /nfsroot/tmpdir /usr/bin/ssh -n 192.168.0.21 touch /nfsroot/tmpdir/tmpdfile /usr/bin/ssh -n 192.168.0.19 mount -t nfs4 192.168.0.21:/ /nfsroot /usr/bin/ssh -n 192.168.0.20 mount -t nfs4 192.168.0.21:/ /nfsroot /usr/bin/ssh -n 192.168.0.21 cat /nfsroot/tmpfile /usr/bin/ssh -n 192.168.0.21 ls -l /nfsroot/tmpdir /usr/bin/ssh -n 192.168.0.19 cat /nfsroot/tmpfile /usr/bin/ssh -n 192.168.0.19 ls -l /nfsroot/tmpdir /usr/bin/ssh -n 192.168.0.20 cat /nfsroot/tmpfile /usr/bin/ssh -n 192.168.0.20 ls -l /nfsroot/tmpdir /usr/bin/ssh -n 192.168.0.19 cat /nfsroot/tmpfile > /dev/null /usr/bin/ssh -n 192.168.0.20 cat /nfsroot/tmpfile > /dev/null /usr/bin/ssh -n 192.168.0.21 rm -rf /nfsroot/tmpfile echo -e "sleep 60~~~~~~~~\n" sleep 60 ############################################################################# last: In 192.168.0.19 I do: #cat /nfsroot/tmpfile <--the nfs server delete the file,but nfs client can read the file hello world I think when the nfs server delete the file , the server should notice the nfs client, but the upstream kernel does't this. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
