From: Andrew Morton <akpm@osdl.org>
To: viro@parcelfarce.linux.theplanet.co.uk
Cc: hch@infradead.org, linux-kernel@vger.kernel.org,
olaf+list.linux-kernel@olafdietsche.de
Subject: Re: procfs permissions on 2.6.x
Date: Sun, 4 Jul 2004 14:55:42 -0700 [thread overview]
Message-ID: <20040704145542.4d1723f5.akpm@osdl.org> (raw)
In-Reply-To: <20040704213527.GV12308@parcelfarce.linux.theplanet.co.uk>
viro@parcelfarce.linux.theplanet.co.uk wrote:
>
> On Sat, Jul 03, 2004 at 02:35:58PM -0700, Andrew Morton wrote:
> > > Because it turns the question what permissions a procfs file has into
> > > a lottery game. He only changes the incore inode owner and as soon as
> > > the inode is reclaimed the old ones return.
> >
> > procfs inodes aren't reclaimable.
>
> WTF do you mean "not reclaimable"?
Got confused.
> They do get freed under memory pressure
> and recreated on later lookups.
Some do. On my test box 1000-odd /proc inodes get allocated and fully
freed on each `ls -R /proc'. 65 /proc inodes are freed during `ls -lR
/proc/net'. So maybe it isn't working completely.
But proc_notify_change() copies the inode's uid, gid and mode into the
proc_dir_entry, so they get correctly initialised when the inode is
reinstantiated, so afaict we have no bug here.
next prev parent reply other threads:[~2004-07-04 21:57 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-03 20:22 procfs permissions on 2.6.x Herbert Poetzl
2004-07-03 20:25 ` Christoph Hellwig
2004-07-03 20:35 ` Andrew Morton
2004-07-03 21:04 ` Christoph Hellwig
2004-07-03 21:35 ` Andrew Morton
2004-07-04 21:35 ` viro
2004-07-04 21:55 ` Andrew Morton [this message]
2004-07-04 22:13 ` viro
2004-07-04 22:43 ` Andrew Morton
2004-07-06 3:31 ` Andy Lutomirski
2004-07-05 1:50 ` Clemens Schwaighofer
2004-07-05 1:55 ` viro
2004-07-05 8:05 ` Duncan Sands
2004-07-05 8:14 ` Clemens Schwaighofer
2004-07-04 1:27 ` bert hubert
[not found] <2dZjc-7BP-15@gated-at.bofh.it>
[not found] ` <2dZjf-7BP-27@gated-at.bofh.it>
[not found] ` <2dZsQ-7GF-23@gated-at.bofh.it>
[not found] ` <2dZVV-867-33@gated-at.bofh.it>
[not found] ` <2e0oZ-8lm-35@gated-at.bofh.it>
[not found] ` <2emSs-6R8-17@gated-at.bofh.it>
[not found] ` <2enbS-72q-19@gated-at.bofh.it>
[not found] ` <2env9-7li-9@gated-at.bofh.it>
2004-07-04 22:25 ` Andi Kleen
2004-07-04 22:37 ` FabF
2004-07-04 23:30 ` Paul Jackson
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=20040704145542.4d1723f5.akpm@osdl.org \
--to=akpm@osdl.org \
--cc=hch@infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=olaf+list.linux-kernel@olafdietsche.de \
--cc=viro@parcelfarce.linux.theplanet.co.uk \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.