Fixed NFS mounting issue

At work, I often use NFS service and also encounter some problems. Luckily, I also fix them and record here.

1. wrong minorversion

NFS: bad mount option value specified: minorversion=1

fixed: specify correct minorversion, not use default value

mount -t nfs -o nolock ${SERVER_IP}:/rootfs/wb /mnt/nfs

change to:

mount -t nfs -o nfsvers=3,nolock ${SERVER_IP}:/rootfs/wb /mnt/nfs

2. prints "NFSD: client x.x.x.x testing state ID with incorrect client ID" on NFS server side

[ 4824.740317] NFSD: client 192.168.100.24 testing state ID with incorrect client ID

[ 4824.898897] NFSD: client 192.168.100.24 testing state ID with incorrect client ID

[ 4824.899860] NFSD: client 192.168.100.24 testing state ID with incorrect client ID

[ 4829.158029] nfsd4_validate_stateid: 22 callbacks suppressed

[ 4829.158030] NFSD: client 192.168.100.117 testing state ID with incorrect client ID

[ 4829.432467] NFSD: client 192.168.100.71 testing state ID with incorrect client ID

[ 4829.433730] NFSD: client 192.168.100.71 testing state ID with incorrect client ID

[ 4829.434959] NFSD: client 192.168.100.71 testing state ID with incorrect client ID

[ 4829.436310] NFSD: client 192.168.100.71 testing state ID with incorrect client ID

fixed: the above log means one same client use different client state ID to mount NFS server.

for multiple mounting actions, must use same commnad, especially, specify a same minorversion

for example:

use nfsvers=3 in kernel command line:

[ 0.000000] Kernel command line: console=ttymxc0,115200n8 root=/dev/nfs rw nfsroot=192.168.100.8:/rootfs/LF_202106151512/imx63_rootfs_r,tcp,hard,v3 fsck.mode=skip no_console_suspend ip=dhcp

when mounting VTE in kernel, also should use nfsvers=3, not use default value

mount -t nfs -o nfsvers=3,nolock ${SERVER_IP}:/rootfs/wb /mnt/nfs

3. prints "NFS: Server x.x.x.x reports our clientid is in use" on client side

[ 721.031670] NFS: Server 192.168.100.8 reports our clientid is in use

[ 721.038186] NFS: state manager: reset session failed on NFSv4 server 192.168.100.8 with error 1

[ 722.076761] NFS: Server 192.168.100.8 reports our clientid is in use

[ 722.083149] NFS: state manager: reset session failed on NFSv4 server 192.168.100.8 with error 1

[ 723.116765] NFS: Server 192.168.100.8 reports our clientid is in use

[ 723.123153] NFS: state manager: reset session failed on NFSv4 server 192.168.100.8 with error 1

[ 724.156437] NFS: Server 192.168.100.8 reports our clientid is in use

[ 724.162824] NFS: state manager: reset session failed on NFSv4 server 192.168.100.8 with error 1

[ 725.196745] NFS: Server 192.168.100.8 reports our clientid is in use

[ 725.203136] NFS: state manager: reset session failed on NFSv4 server 192.168.100.8 with error 1

fixed: just guess that I modify /etc/exports configuration file and cause above errors.

restore /etc/exports file:

/rootfs *(rw,sync,subtree_check,no_root_squash)

and use nfsvers=3 to mount NFS for all clients