From: "Darrick J. Wong" <darrick.wong-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
To: Jann Horn <jannh-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Cc: Michael Kerrisk-manpages
<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
linux-xfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-ext4-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Linux API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH] ioctl_getfsmap.2: document the GETFSMAP ioctl
Date: Mon, 8 May 2017 11:41:12 -0700 [thread overview]
Message-ID: <20170508184112.GJ5973@birch.djwong.org> (raw)
In-Reply-To: <CAG48ez1AWewJRg8gySgihn0y15jRhC6C+5DNwGsDpAhtokB=Lw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Mon, May 08, 2017 at 12:17:53AM +0200, Jann Horn wrote:
> On Sun, May 7, 2017 at 5:58 PM, Darrick J. Wong <darrick.wong-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> wrote:
> > Document the new GETFSMAP ioctl that returns the physical layout of a
> > (disk-based) filesystem.
> [...]
> > +.B EPERM
> > +This query is not allowed.
>
> Please document the circumstances under which a query is allowed.
For the two current implementations, queries are always allowed.
(The doc could be more explicit about this decision being left to the
implementation.)
> Also: From a quick glance at the XFS implementation, I don't see any
> privilege checks. Am I missing something, or does this API permit an
> unprivileged user to determine the number of physical blocks allocated
> for any inode, even for inodes the user can't ordinarily see in any
> way?
Correct.
--D
> --
> To unsubscribe from this list: send the line "unsubscribe linux-xfs" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-man" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2017-05-08 18:41 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-07 15:58 [PATCH] ioctl_getfsmap.2: document the GETFSMAP ioctl Darrick J. Wong
2017-05-07 22:17 ` Jann Horn
[not found] ` <CAG48ez1AWewJRg8gySgihn0y15jRhC6C+5DNwGsDpAhtokB=Lw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-05-08 18:41 ` Darrick J. Wong [this message]
2017-05-08 18:47 ` Jann Horn
[not found] ` <CAG48ez3e+2VuvjtEfJuMujEo6PWBO3z8oM-otN2juq96jKdjCw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-05-08 20:47 ` Darrick J. Wong
2017-05-08 22:54 ` Jann Horn
[not found] ` <CAG48ez0iLRazKvXty9CG8ENXvkG6b1xjO0Q75p+16HKNptFnow-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-05-09 1:53 ` Darrick J. Wong
[not found] ` <20170509015324.GM5973-PTl6brltDGh4DFYR7WNSRA@public.gmane.org>
2017-05-09 21:17 ` Eric Biggers
2017-05-10 16:38 ` Theodore Ts'o
2017-05-10 19:27 ` Eric W. Biederman
[not found] ` <87mvakpl5m.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-05-10 20:14 ` Darrick J. Wong
[not found] ` <20170510201437.GA9854-PTl6brltDGh4DFYR7WNSRA@public.gmane.org>
2017-05-11 5:10 ` Eric Biggers
2017-05-14 1:41 ` Andreas Dilger
[not found] ` <38F56772-7836-4902-929C-80908BFBEA7B-m1MBpc4rdrD3fQ9qLvQP4Q@public.gmane.org>
2017-05-14 4:25 ` Darrick J. Wong
2017-05-14 13:56 ` Andy Lutomirski
[not found] ` <CALCETrX0=w8tDQbAysZH3AHvvaGvPb54Jj7=Eiuk0uoB+fRfzQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-05-18 2:04 ` Darrick J. Wong
[not found] <148738063792.29384.10681837280402457846.stgit@birch.djwong.org>
2017-02-21 22:14 ` Darrick J. Wong
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170508184112.GJ5973@birch.djwong.org \
--to=darrick.wong-qhclzuegtsvqt0dzr+alfa@public.gmane.org \
--cc=jannh-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org \
--cc=linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-ext4-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-xfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).