linux-kernel - Re: [RFC v7 22/41] richacl: Propagate everyone@ permissions to other aces

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Date:	Tue, 22 Sep 2015 01:44:21 +0200
From:	Andreas Gruenbacher <agruenba@...hat.com>
To:	"J. Bruce Fields" <bfields@...ldses.org>
Cc:	linux-kernel@...r.kernel.org,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-nfs@...r.kernel.org, linux-api@...r.kernel.org,
	linux-cifs@...r.kernel.org, linux-security-module@...r.kernel.org,
	Andreas Gruenbacher <agruen@...nel.org>
Subject: Re: [RFC v7 22/41] richacl: Propagate everyone@ permissions to other aces

2015-09-18 23:36 GMT+02:00 J. Bruce Fields <bfields@...ldses.org>:
> On Sat, Sep 05, 2015 at 12:27:17PM +0200, Andreas Gruenbacher wrote:
>> +     if (!richace_is_owner(who) &&
>> +         richace_is_everyone(ace) && richace_is_allow(ace) &&
>
> That richace_is_allow(ace) check is redundant at this point, isn't it?

Yes, I'll change that.

>> +         !(allow & ~(ace->e_mask & acl->a_other_mask)))
>
> Uh, I wish C had a subset-of operator, that construct took me longer to
> work out than I should admit.
>
>> +             allow = 0;
>> +
>> +     if (allow) {
>> +             if (allow_last)
>> +                     return richace_change_mask(alloc, &allow_last,
>> +                                                allow_last->e_mask | allow);
>> +             else {
>> +                     struct richace who_copy;
>> +
>> +                     richace_copy(&who_copy, who);
>> +                     ace = acl->a_entries + acl->a_count - 1;
>
> Isn't ace already set to the last ace?

Yes indeed, that line can also go.

Thanks,
Andreas
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