When exporting a NFSv4 share with "-ro" (readonly) the option gets ignored and the share can be mounted "rw" (readwrite) on the remote machine. How-To-Repeat: Enable NFSv4 on both the nfs server and the client and define a NFSv4 export with a "-ro" option. Then, on the nfs client, mount the export as "rw".
Responsible Changed From-To: freebsd-bugs->freebsd-fs Fix synopsis and assign.
State Changed From-To: open->closed An email discussion determined that the file system was actually exported read/write to the client. Some improvements to the exports.5 man page are needed.