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Message-ID: <20240327142241.1745989-1-aleksander.lobakin@intel.com>
Date: Wed, 27 Mar 2024 15:22:38 +0100
From: Alexander Lobakin <aleksander.lobakin@...el.com>
To: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: Alexander Lobakin <aleksander.lobakin@...el.com>,
Kees Cook <keescook@...omium.org>,
"Gustavo A. R. Silva" <gustavoars@...nel.org>,
Nathan Chancellor <nathan@...nel.org>,
Simon Horman <horms@...nel.org>,
nex.sw.ncis.osdt.itp.upstreaming@...el.com,
intel-wired-lan@...ts.osuosl.org,
linux-hardening@...r.kernel.org,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH net-next v2 0/3] compiler_types: add Endianness-dependent __counted_by_{le,be}
Some structures contain flexible arrays at the end and the counter for
them, but the counter has explicit Endianness and thus __counted_by()
can't be used directly.
To increase test coverage for potential problems without breaking
anything, introduce __counted_by_{le,be} defined depending on platform's
Endianness to either __counted_by() when applicable or noop otherwise.
The first user will be virtchnl2.h from idpf just as example with 9 flex
structures having Little Endian counters.
Maybe it would be a good idea to introduce such attributes on compiler
level if possible, but for now let's stop on what we have.
Alexander Lobakin (3):
compiler_types: add Endianness-dependent __counted_by_{le,be}
idpf: make virtchnl2.h self-contained
idpf: sprinkle __counted_by{,_le}() in the virtchnl2 header
Documentation/conf.py | 2 ++
scripts/kernel-doc | 1 +
include/linux/compiler_types.h | 11 ++++++++++
drivers/net/ethernet/intel/idpf/idpf_txrx.h | 2 ++
drivers/net/ethernet/intel/idpf/virtchnl2.h | 24 ++++++++++-----------
5 files changed, 28 insertions(+), 12 deletions(-)
---
>From v1[0]:
* fix compilation of #2 (Jakub);
* pick Acked-bys (Gustavo).
>From RFC[1]:
* teach kdoc new attributes (Simon, Kees);
* add Acked-by (Kees);
* fix a couple typos;
* send to net-next (Kees).
[0] https://lore.kernel.org/netdev/20240326164116.645718-1-aleksander.lobakin@intel.com
[1] https://lore.kernel.org/netdev/20240318130354.2713265-1-aleksander.lobakin@intel.com
--
2.44.0
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