linux-kernel - Re: [PATCH 26/35] Unionfs: Privileged operations workqueue

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Message-ID: <20061205195013.GE2240@filer.fsl.cs.sunysb.edu>
Date:	Tue, 5 Dec 2006 14:50:13 -0500
From:	Josef Sipek <jsipek@....cs.sunysb.edu>
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
Cc:	"Josef 'Jeff' Sipek" <jsipek@...sunysb.edu>,
	linux-kernel@...r.kernel.org, torvalds@...l.org, akpm@...l.org,
	hch@...radead.org, viro@....linux.org.uk,
	linux-fsdevel@...r.kernel.org, mhalcrow@...ibm.com
Subject: Re: [PATCH 26/35] Unionfs: Privileged operations workqueue

On Tue, Dec 05, 2006 at 08:27:51PM +0100, Jan Engelhardt wrote:
> 
> On Dec 4 2006 07:30, Josef 'Jeff' Sipek wrote:
> >+#include "union.h"
> >+
> >+struct workqueue_struct *sioq;
> >+
> >+int __init init_sioq(void)
> 
> Although it's just me, I'd prefer sioq_init(), sioq_exit(),
> sioq_run(), etc. to go in hand with what most drivers use as naming
> (i.e. <modulename> "_" <function>).

That makes sense.

> >+	sioq = create_workqueue("unionfs_siod");
> 
> Beat me: what does SIO stand for?

Super-user IO - sometimes we need to perform actions which would fail due to
the unix permissions on the parent directory (e.g., rmdir a directory which
appears empty, but in reality contains whiteouts).

> >+void fin_sioq(void)
> 
> No __exit tag?

Good catch.

> >+void __unionfs_mknod(void *data)
> >+{
> >+	struct sioq_args *args = data;
> >+	struct mknod_args *m = &args->mknod;
> 
> Care to make that: const struct mknod_args *m = &args->mknod;?
> (Same for other places)
 
Right.
 
> >+
> >+	args->err = vfs_mknod(m->parent, m->dentry, m->mode, m->dev);
> >+	complete(&args->comp);
> >+}
> >+void __unionfs_symlink(void *data)
> >+{
> 
> Hah, missing free line :^)

:)

> >+	struct sioq_args *args = data;
> >+	struct symlink_args *s = &args->symlink;
> >+
> >+	args->err = vfs_symlink(s->parent, s->dentry, s->symbuf, s->mode);
> >+	complete(&args->comp);
> >+}
> >+
> 
> >+++ b/fs/unionfs/sioq.h
> >+struct isopaque_args {
> >+	struct dentry *dentry;
> >+};
> 
> This name puzzled me at first. iso - paque - "same (o)paque"?
> Try is_opaque_args.

Will do.

> >+/* Extern definitions for our privledge escalation helpers */
> 
> -> privilege

Why do I keep misspelling that?

Thanks for the comments.

Josef "Jeff" Sipek.

-- 
Bad pun of the week: The formula 1 control computer suffered from a race
condition
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