From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933436AbeCPRIK (ORCPT ); Fri, 16 Mar 2018 13:08:10 -0400 Received: from isilmar-4.linta.de ([136.243.71.142]:43112 "EHLO isilmar-4.linta.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933433AbeCPRHD (ORCPT ); Fri, 16 Mar 2018 13:07:03 -0400 From: Dominik Brodowski To: linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, davem@davemloft.net Cc: netdev@vger.kernel.org Subject: [PATCH -next 00/22] remove in-kernel syscall invocations (part 2 == netdev) Date: Fri, 16 Mar 2018 18:05:52 +0100 Message-Id: <20180316170614.5392-1-linux@dominikbrodowski.net> X-Mailer: git-send-email 2.16.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Here is another series of patches which reduce the number of syscall invocations from within the kernel. This series is focused solely on the net/ part of the kernel and get rids of syscall and compat_syscall invocations from within the kernel completely. It is also available at https://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux.git syscalls-net-next The rationale of this change is described in patch 1 of part 1[*] as follows: The syscall entry points to the kernel defined by SYSCALL_DEFINEx() and COMPAT_SYSCALL_DEFINEx() should only be called from userspace through kernel entry points, but not from the kernel itself. This will allow cleanups and optimizations to the entry paths *and* to the parts of the kernel code which currently need to pretend to be userspace in order to make use of syscalls. At present, these patches are based on v4.16-rc5; there is one trivial conflict against net-next. Dave, I presume that you prefer to take them through net-next? If you want to, I can re-base them against net-next. If you prefer otherwise, though, I can route them as part of my whole syscall series. Thanks, Dominik [*] The cover letter for v2 is available at http://lkml.kernel.org/r/20180315190529.20943-1-linux@dominikbrodowski.net ; the whole patchset -- in its current, slightly modified form -- is available at at https://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux.git syscalls-next Dominik Brodowski (22): net: socket: add __sys_recvfrom() helper; remove in-kernel call to syscall net: socket: add __sys_sendto() helper; remove in-kernel call to syscall net: socket: add __sys_accept4() helper; remove in-kernel call to syscall net: socket: add __sys_socket() helper; remove in-kernel call to syscall net: socket: add __sys_bind() helper; remove in-kernel call to syscall net: socket: add __sys_connect() helper; remove in-kernel call to syscall net: socket: add __sys_listen() helper; remove in-kernel call to syscall net: socket: add __sys_getsockname() helper; remove in-kernel call to syscall net: socket: add __sys_getpeername() helper; remove in-kernel call to syscall net: socket: add __sys_socketpair() helper; remove in-kernel call to syscall net: socket: add __sys_shutdown() helper; remove in-kernel call to syscall net: socket: add __sys_setsockopt() helper; remove in-kernel call to syscall net: socket: add __sys_getsockopt() helper; remove in-kernel call to syscall net: socket: add do_sys_recvmmsg() helper; remove in-kernel call to syscall net: socket: move check for forbid_cmsg_compat to __sys_...msg() net: socket: replace calls to sys_send() with __sys_sendto() net: socket: replace call to sys_recv() with __sys_recvfrom() net: socket: add __compat_sys_recvfrom() helper; remove in-kernel call to compat syscall net: socket: add __compat_sys_setsockopt() helper; remove in-kernel call to compat syscall net: socket: add __compat_sys_getsockopt() helper; remove in-kernel call to compat syscall net: socket: add __compat_sys_recvmmsg() helper; remove in-kernel call to compat syscall net: socket: add __compat_sys_...msg() helpers; remove in-kernel calls to compat syscalls include/linux/socket.h | 37 +++++++- net/compat.c | 136 +++++++++++++++++++--------- net/socket.c | 234 ++++++++++++++++++++++++++++++++++--------------- 3 files changed, 291 insertions(+), 116 deletions(-) -- 2.16.2