Re: [PATCH 2/5] 9pfs: fix qemu_mknodat(S_IFSOCK) on macOS

[Christian Schoenebeck]

On Mittwoch, 20. April 2022 11:09:46 CEST Greg Kurz wrote:
> On Tue, 19 Apr 2022 13:41:03 +0200
> 
> Christian Schoenebeck <qemu_oss@crudebyte.com> wrote:
> > mknod() on macOS does not support creating sockets, so divert to
> > call sequence socket(), bind() and chmod() respectively if S_IFSOCK
> > was passed with mode argument.
> 
> Hmm... thinking again about this one : QEMU on linux calls the libc
> version of mknodat() which doesn't seem to support S_IFSOCK according
> to the mknod(3P) manual page. So I'm not sure there's something to
> be actually fixed here... what's the observed behavior on linux ?

It's unclear to me where you got that from. In all Linux man pages I looked up 
so far it said S_IFSOCK was supported. But I also tested this now with 
security_model=none on a Linux host and it works as expected, i.e. it creates 
a file of type socket on the Linux host filesystem.

We are really talking about a Linux host, right?

Best regards,
Christian Schoenebeck