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SubjectRe: [PATCH] Introduce BSD-style user credential [3/3]
>>>>> " " == Linus Torvalds <> writes:

> One thing that may be interesting (I certainly think it migth
> be), would be to add a "struct user_struct *" pointer to the
> vfs_cred as well. This is because I'd just _love_ to have that
> "user_struct" fed down to the VFS layer, since I think that is
> where we may some day want to put things like user-supplied
> cryptographic keys etc.

> The advantage of "struct user_struct" (as opposed to just a
> uid_t) is that it can have information that lives for the whole
> duration of a login, and it's really the only kind of data
> structure in the kernel that can track that kind of
> information.

No problem at all with this. Indeed I agree it makes a lot of sense...

The only thing is if you'd allow me to do it as an incremental patch
to the initial one?
I don't see 'struct user_struct *' as replacing the existing 'uid'
entry, so there should be no need to change the existing API. Instead,
we can just add in the necessary call to alloc_uid() to
vfscred_create() and/or setfsuid()...

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