> -----邮件原件-----
> 发件人: Jeff Layton <jlayton@xxxxxxxxxx>
> 发送时间: 2024年3月19日 21:09
> 收件人: Chen, Hanxiaochenhx.fnst@xxxxxxxxxxx>; Chuck Lever
> <chuck.lever@xxxxxxxxxx>; Neil Brown <neilb@xxxxxxx>; Olga Kornievskaia
> <kolga@xxxxxxxxxx>; Dai Ngo <Dai.Ngo@xxxxxxxxxx>; Tom Talpey
> <tom@xxxxxxxxxx>
> 抄送: linux-nfs@xxxxxxxxxxxxxxx
> 主题: Re: [PATCH] NFSD: nfsctl: remove read permission of filehandle
>
> On Tue, 2024-03-19 at 18:47 +0800, Chen Hanxiao wrote:
> > As write_filehandle can't accept zero-bytes writting,
> > remove read permission of /proc/fs/nfsd/filehandle
> >
> > Signed-off-by: Chen Hanxiao <chenhx.fnst@xxxxxxxxxxx>
...
>
>
> I don't think we can do this. mountd does this to get the rootfh for an
> exported fs and it'll probably start failing if it can't open that file
> for read:
>
> f = open("/proc/fs/nfsd/filehandle", O_RDWR);
>
> That write_filehandle interface sure is weird though. Could we get rid
> of it by teaching cache_get_filehandle how to use name_to_handle_at
> instead? That would be a lot cleaner and would get rid of yet another
> dependency on /proc/fs/nfsd.
name_to_handle_at return struct file_handle
cache_get_filehandle return hexed struct knfsd_fh
Could you please give some hints on how to convert from file_handle. f_handle to knfsd_fh.fh_raw?
Regards,
- Chen
> --
> Jeff Layton <jlayton@xxxxxxxxxx>
