Re: [RFC PATCH 0/2] vfs:9p: fix open-unlink-fstat bug

[Al Viro]

On Mon, Jul 20, 2020 at 09:46:20AM +0800, Jianyong Wu wrote:
> how to reproduce:
> in 9p guest:
> 
> struct stat *statbuf;
> int fd;
> 
> fd = open("tmp", O_RDWR);
> unlink("tmp");
> fstat(fd, statbuf);
> 
> fstat will fail as "tmp" in 9p server side has been removed. 9p server
> can't retrieve the file context as the guest has not passed it down.
> so we should pass the file info down in 9p guest in getattr op.
> it need add a new file member in "struct kstat" as "struct istat" does.

Er... what struct istat?