lkml.org 
[lkml]   [2018]   [Jul]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH 24/32] vfs: syscall: Add fsopen() to prepare for superblock creation [ver #9]
On Fri, Jul 13, 2018 at 8:40 AM, David Howells <dhowells@redhat.com> wrote:
> Andy Lutomirski <luto@amacapital.net> wrote:
>
>> > Whilst I'm at it, do we want the option of doing the equivalent of
>> > mountat()? I.e. offering the option to open all the device files used by
>> > a superblock with dfd and AT_* flags in combination with the filename?
>> >
>>
>> Isn't that more or less what I was suggesting?
>
> Yes, you suggested that. I'm asking if we actually need that.
>

Suppose some program in a container chroots itself and then tries to
create an fscontext backed by "/path/to/blockdev". The syscall gets
intercepted by a container manager. That manager now has a somewhat
awkward time of mounting the same fs, although it could use
"/proc/PID/root/path/to/blockdev", I suppose. Even that approach has
some potentially awkward permission issues. I would defer to the
people who actually write software like this, but I can imagine fds
being considerably easier to work with.
\
 
 \ /
  Last update: 2018-07-15 22:07    [W:0.134 / U:1.284 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site