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Why would NFS-mounted rootfs be "read-only"?

Question asked by Ed Sutter on Mar 3, 2014
Latest reply on Mar 4, 2014 by Ed Sutter

I have been in the process of reworking the SABRESD linux to run on our custom hardware.

I have been primarily runing with my rootfs NFS-mounted and that has been fine.

Something has changed that has caused my board to boot up with rootfs now read-only.

I have no idea what caused this to change.

My /etc/exports file entry for this is:

/Full_path_to_my_rootfs_directory/my_rootfs *(rw,no_root_squash)

I've run exportfs -a, and my kernel command line is:

console=ttymxc0,115200 ip=dhcp root=/dev/nfs nfsroot=${serverip}:/Full_path_to_my_rootfs_directory/my_rootfs,v3,tcp


Then at bootup, I see this message:


VFS: Mounted root (nfs filesystem) readonly on device 0:11.


I am able to log in however, everything is readonly.

This used to work.

Same server, same client, nothing obvious (related to NFS) has changed.

Any idea what might cause this?