NFSv4 (along with, from what I'm told, Samba) has a problem with read leases, which is that they are currently only broken on write opens, whereas they should really be broken on any operation that changes an inode's metadata or any of the links pointing to it. Also, to break leases in a non-racy way it's not sufficient to have a single break_lease() call from the vfs code; we also need to prevent anyone from acquiring a new lease while the operation is still in progress. So here's one attempt to deal with those problems, by adding to the inode a counter which is incremented whenever we start such an operation and decremented when we finish it. I only handle unlink; we'd also need to do link, rename, chown, and chmod, at least. Comments? Better ideas? --b. -- 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
