linux-kernel - Re: [PATCH -V19 00/15] Generic name to handle and open by handle syscalls

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <m3y6b0s1z4.fsf@linux.vnet.ibm.com>
Date:	Fri, 17 Sep 2010 23:10:15 +0530
From:	"Aneesh Kumar K. V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	Miklos Szeredi <miklos@...redi.hu>
Cc:	miklos@...redi.hu, miklos@...redi.hu, hch@...radead.org,
	viro@...iv.linux.org.uk, adilger@....com, corbet@....net,
	neilb@...e.de, npiggin@...nel.dk, hooanon05@...oo.co.jp,
	bfields@...ldses.org, miklos@...redi.hu,
	linux-fsdevel@...r.kernel.org, sfrench@...ibm.com,
	philippe.deniel@....FR, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -V19 00/15] Generic name to handle and open by handle syscalls

On Mon, 13 Sep 2010 08:01:18 +0200, Miklos Szeredi <miklos@...redi.hu> wrote:
> On Mon, 13 Sep 2010, Aneesh Kumar K. V wrote:
> > d) we can drop stat, chown and xattr syscall because they are introduced
> >    specially for symlinks as we don't allow open on symlinks.
> > e) It would be nice to have handle based stat syscall to avoid two
> >    syscall overhead for fetching file attributes when implementing a
> >    file server, where fetching file attribute is a common operation. 
> 
> Syscall overhead is generally insignificant compared to other effects.
> The server can also cache open files for commonly used handles.
> 

For some client/server file system an open would require communication to
the server where as we can get stat result based on the values
cached on the client if we support handle based stat.

-aneesh
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/