[Samba] How samba guarantee close-to-open consistency?

[jie wang]

Thanks the reply, I'm interested in the DOS attributes, how can we avoid
storing an xattr ?

"Another question would be which metadata your shooting for? stat info?
DOS attributes? For the latter we have some design ideas to avoid the
need to store an xattr with the DOS attributes for the default case."

On Thu, Jun 23, 2022 at 10:37 PM Ralph Boehme <slow at samba.org> wrote:

> On 6/23/22 15:54, jie wang wrote:
> > Yes, we implement a vfs module which has cache. And we want to get
> > attributes from cache when samba calls openat.
>
> well, I guess the correct way to tackle this would be to let the
> *clients* do the caching with leases for file data and with directory
> leases for file metadata.
>
> But if you really want to cache on the server side, you could signal all
> other smbds with a message to drop the cache when you process the close
> in your VFS module.
>
> Another question would be which metadata your shooting for? stat info?
> DOS attributes? For the latter we have some design ideas to avoid the
> need to store an xattr with the DOS attributes for the default case.
>
> Cheers!
> -slow
>
> --
> Ralph Boehme, Samba Team                 https://samba.org/
> SerNet Samba Team Lead      https://sernet.de/en/team-samba
>