Re: Are NFS handles stable across major updates?

[Jason Thorpe <thorpej%me.com@localhost>]

> On Dec 13, 2024, at 3:52 PM, Edgar Fuß <ef%math.uni-bonn.de@localhost> wrote:
> 
>> raidframe without dk, these can be made to be stable
> The RAID has a GPT, so the file systems on it are dks.
> 
>> will return stale handle now.
> What I'm really concerned about is not ESTALE, but the possibility of an open 
> NFS handle to suddenly refer to /a different file/ after the update.

Right, the problem is NetBSD’s file handles have this little guy at the front:

typedef struct { int32_t __fsid_val[2]; } fsid_t; /* file system id type */

In a perfect world, each file system would have a UUID and the file handle would pack the UUID in front of the file ID rather than this fsid_t thing (which is really just container for a dev_t).

-- thorpej