From: Christoph Hellwig <hch@lst.de>
To: "Mkrtchyan, Tigran" <tigran.mkrtchyan@desy.de>
Cc: Christoph Hellwig <hch@lst.de>,
Trond Myklebust <trond.myklebust@primarydata.com>,
Anna Schumaker <anna.schumaker@netapp.com>,
"J. Bruce Fields" <bfields@fieldses.org>,
Jeff Layton <jlayton@poochiereds.net>,
linux-nfs <linux-nfs@vger.kernel.org>
Subject: Re: [PATCH 02/32] sunrpc: fix encoder callback prototypes
Date: Tue, 9 May 2017 15:11:08 +0200 [thread overview]
Message-ID: <20170509131108.GA15042@lst.de> (raw)
In-Reply-To: <779451235.5133504.1494323029528.JavaMail.zimbra@desy.de>
On Tue, May 09, 2017 at 11:43:49AM +0200, Mkrtchyan, Tigran wrote:
> just out of curiosity: you are talking about increasing type safety, but
> at the same time replaces arguments to 'const void *data', which will accept
> everything. Is there something special which I don't understand?
Nothing special - cast are potentially dangerous in general, and
function pointer cases are especially dangerous as there is no
verify the caller and callee signatures match at all. As generic
method call patterns need to have private data of some points they
need to have a void pointer somewhere - either in the signature or
as a pointer from a passed structure. For those the compiler at least
can do some basic sanity checking, and good static analysis tools can
even verify we get the proper object using whole program analysis.
next prev parent reply other threads:[~2017-05-09 13:11 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-09 9:19 RFC: remove function pointer casts and constify function tables Christoph Hellwig
2017-05-09 9:19 ` [PATCH 01/32] sunrpc: properly type argument to kxdreproc_t Christoph Hellwig
2017-05-09 9:19 ` [PATCH 02/32] sunrpc: fix encoder callback prototypes Christoph Hellwig
2017-05-09 9:43 ` Mkrtchyan, Tigran
2017-05-09 13:11 ` Christoph Hellwig [this message]
2017-05-09 13:30 ` Jeff Layton
2017-05-09 14:17 ` J. Bruce Fields
2017-05-10 18:38 ` J. Bruce Fields
2017-05-09 12:28 ` Trond Myklebust
2017-05-09 9:19 ` [PATCH 03/32] lockd: " Christoph Hellwig
2017-05-09 12:29 ` Trond Myklebust
2017-05-09 9:19 ` [PATCH 04/32] nfs: " Christoph Hellwig
2017-05-09 12:30 ` Trond Myklebust
2017-05-09 9:19 ` [PATCH 05/32] nfsd: " Christoph Hellwig
2017-05-09 9:19 ` [PATCH 06/32] sunrpc/auth_gss: " Christoph Hellwig
2017-05-09 12:32 ` Trond Myklebust
2017-05-09 9:19 ` [PATCH 07/32] sunrpc: properly type argument to kxdrdproc_t Christoph Hellwig
2017-05-09 12:34 ` Trond Myklebust
2017-05-09 9:19 ` [PATCH 08/32] sunrpc: fix decoder callback prototypes Christoph Hellwig
2017-05-09 9:19 ` [PATCH 09/32] sunrpc/auth_gss: " Christoph Hellwig
2017-05-09 12:35 ` Trond Myklebust
2017-05-09 9:19 ` [PATCH 10/32] nfsd: " Christoph Hellwig
2017-05-09 9:19 ` [PATCH 11/32] lockd: " Christoph Hellwig
2017-05-09 12:36 ` Trond Myklebust
2017-05-09 9:19 ` [PATCH 12/32] nfs: " Christoph Hellwig
2017-05-09 12:37 ` Trond Myklebust
2017-05-09 9:19 ` [PATCH 13/32] nfs: don't cast callback decode/proc/encode routines Christoph Hellwig
2017-05-09 12:38 ` Trond Myklebust
2017-05-09 9:19 ` [PATCH 14/32] RFC: sunrpc: remove p_count Christoph Hellwig
2017-05-09 12:41 ` Trond Myklebust
2017-05-09 9:19 ` [PATCH 15/32] sunrpc: mark all struct rpc_procinfo instances as const Christoph Hellwig
2017-05-09 12:42 ` Trond Myklebust
2017-05-09 9:19 ` [PATCH 16/32] lockd: fix some weird indentation Christoph Hellwig
2017-05-09 12:43 ` Trond Myklebust
2017-05-09 9:19 ` [PATCH 17/32] nfsd4: const-ify nfs_cb_version4 Christoph Hellwig
2017-05-09 9:19 ` [PATCH 18/32] nfsd: use named initializers in PROC() Christoph Hellwig
2017-05-09 9:19 ` [PATCH 19/32] nfsd: remove the unused PROC() macro in nfs3proc.c Christoph Hellwig
2017-05-09 9:19 ` [PATCH 20/32] sunrpc: properly type pc_func callbacks Christoph Hellwig
2017-05-09 9:19 ` [PATCH 21/32] sunrpc: properly type pc_release callbacks Christoph Hellwig
2017-05-09 9:20 ` [PATCH 22/32] sunrpc: properly type pc_decode callbacks Christoph Hellwig
2017-05-09 9:20 ` [PATCH 23/32] sunrpc: properly type pc_encode callbacks Christoph Hellwig
2017-05-09 12:10 ` Trond Myklebust
2017-05-09 9:20 ` [PATCH 24/32] sunrpc: remove kxdrproc_t Christoph Hellwig
2017-05-09 9:20 ` [PATCH 25/32] nfsd4: properly type op_set_currentstateid callbacks Christoph Hellwig
2017-05-09 9:20 ` [PATCH 26/32] nfsd4: properly type op_get_currentstateid callbacks Christoph Hellwig
2017-05-09 9:20 ` [PATCH 27/32] nfsd4: remove nfsd4op_rsize Christoph Hellwig
2017-05-09 9:20 ` [PATCH 28/32] nfsd4: properly type op_func callbacks Christoph Hellwig
2017-05-09 9:20 ` [PATCH 29/32] RFC: sunrpc: remove pc_count Christoph Hellwig
2017-05-09 12:16 ` Trond Myklebust
2017-05-09 13:43 ` Chuck Lever
2017-05-09 17:35 ` Jeff Layton
2017-05-09 9:20 ` [PATCH 30/32] sunrpc: mark all struct svc_procinfo instances as const Christoph Hellwig
2017-05-09 9:20 ` [PATCH 31/32] sunrpc: mark all struct svc_version " Christoph Hellwig
2017-05-09 12:11 ` Trond Myklebust
2017-05-09 9:20 ` [PATCH 32/32] nfsd4: const-ify nfsd4_ops Christoph Hellwig
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