[lkml]   [2017]   [Oct]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFC PATCH 3/3] fs: detect that the i_rwsem has already been taken exclusively
On Sat, 2017-09-30 at 18:56 -0700, Linus Torvalds wrote:
> On Sep 30, 2017 18:33, "Eric W. Biederman" <> wrote:.
> That would require a task_work or another kind of work callback so that
> the writes of the xattr are not synchronous with the vfs callback
> correct?
> No, why?
> You should just invalidate the IMA on xattr write or other operations that
> make the measurement invalid. You only need the inner lock.

Right, re-introducing the iint->mutex and a new i_generation field in
the iint struct with a separate set of locks should work.  It will be
reset if the file metadata changes (eg. setxattr, chown, chmod).

(We need i_generation for namespacing IMA as well.)



 \ /
  Last update: 2017-10-01 14:09    [W:0.042 / U:35.728 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site