diff options
| -rw-r--r-- | src/Makefile | 1 | ||||
| -rw-r--r-- | src/README | 1 | ||||
| -rw-r--r-- | src/l2fwd/LICENSE.txt | 339 | ||||
| -rw-r--r-- | src/l2fwd/Makefile | 43 | ||||
| -rwxr-xr-x | src/l2fwd/gen_debian_package.sh | 72 | ||||
| -rw-r--r-- | src/l2fwd/l2fwd.c | 167 |
6 files changed, 623 insertions, 0 deletions
diff --git a/src/Makefile b/src/Makefile index 5326e468..3b7104ad 100644 --- a/src/Makefile +++ b/src/Makefile @@ -23,6 +23,7 @@ include mk/master.mk # specify upstream package as SUBDIRS - common terms as suggest by gnu-make SUBDIRS = +SUBDIRS += l2fwd SUBDIRS += dpdk SUBDIRS += ovs @@ -26,3 +26,4 @@ So this whole folder can be ignored. * mk: contains top level makefiles * dpdk: place holder for dpdk package * ovs: place holder for ovs package. +* l2fwd: simple l2 forwarding kernel module diff --git a/src/l2fwd/LICENSE.txt b/src/l2fwd/LICENSE.txt new file mode 100644 index 00000000..d159169d --- /dev/null +++ b/src/l2fwd/LICENSE.txt @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Lesser General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +this service if you wish), that you receive source code or can get it +if you want it, that you can change the software or use pieces of it +in new free programs; and that you know you can do these things. + + To protect your rights, we need to make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. You must make sure that they, too, receive or can get the +source code. And you must show them these terms so they know their +rights. + + We protect your rights with two steps: (1) copyright the software, and +(2) offer you this license which gives you legal permission to copy, +distribute and/or modify the software. + + Also, for each author's protection and ours, we want to make certain +that everyone understands that there is no warranty for this free +software. If the software is modified by someone else and passed on, we +want its recipients to know that what they have is not the original, so +that any problems introduced by others will not reflect on the original +authors' reputations. + + Finally, any free program is threatened constantly by software +patents. We wish to avoid the danger that redistributors of a free +program will individually obtain patent licenses, in effect making the +program proprietary. To prevent this, we have made it clear that any +patent must be licensed for everyone's free use or not licensed at all. + + The precise terms and conditions for copying, distribution and +modification follow. + + GNU GENERAL PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. This License applies to any program or other work which contains +a notice placed by the copyright holder saying it may be distributed +under the terms of this General Public License. The "Program", below, +refers to any such program or work, and a "work based on the Program" +means either the Program or any derivative work under copyright law: +that is to say, a work containing the Program or a portion of it, +either verbatim or with modifications and/or translated into another +language. (Hereinafter, translation is included without limitation in +the term "modification".) Each licensee is addressed as "you". + +Activities other than copying, distribution and modification are not +covered by this License; they are outside its scope. The act of +running the Program is not restricted, and the output from the Program +is covered only if its contents constitute a work based on the +Program (independent of having been made by running the Program). +Whether that is true depends on what the Program does. + + 1. You may copy and distribute verbatim copies of the Program's +source code as you receive it, in any medium, provided that you +conspicuously and appropriately publish on each copy an appropriate +copyright notice and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + + 2. 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But when you +distribute the same sections as part of a whole which is a work based +on the Program, the distribution of the whole must be on the terms of +this License, whose permissions for other licensees extend to the +entire whole, and thus to each and every part regardless of who wrote it. + +Thus, it is not the intent of this section to claim rights or contest +your rights to work written entirely by you; rather, the intent is to +exercise the right to control the distribution of derivative or +collective works based on the Program. + +In addition, mere aggregation of another work not based on the Program +with the Program (or with a work based on the Program) on a volume of +a storage or distribution medium does not bring the other work under +the scope of this License. + + 3. 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For software which is copyrighted by the Free +Software Foundation, write to the Free Software Foundation; we sometimes +make exceptions for this. Our decision will be guided by the two goals +of preserving the free status of all derivatives of our free software and +of promoting the sharing and reuse of software generally. + + NO WARRANTY + + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY +FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN +OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES +PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED +OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS +TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, +REPAIR OR CORRECTION. + + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + <signature of Ty Coon>, 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/src/l2fwd/Makefile b/src/l2fwd/Makefile new file mode 100644 index 00000000..21fbe5bb --- /dev/null +++ b/src/l2fwd/Makefile @@ -0,0 +1,43 @@ +# Copyright 2015 Futurewei Inc. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# A copy of the license is included with this distribution. If you did not +# recieve a copy you may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +obj-m += l2fwd.o + +KBUILD_CFLAGS += -Wno-unused-function -Wno-unused-label -Wno-unused-variable +# Allow kernel version to be overridden by environment +KERNEL_VERSION ?= $(shell uname -r) + +KERNELDIR := /lib/modules/$(KERNEL_VERSION)/build +PWD := $(shell pwd) + +all: + $(MAKE) -C $(KERNELDIR) M=$(PWD) modules + +sanity: + echo "Done" + +clean: + $(MAKE) -C $(KERNELDIR) M=$(PWD) clean + rm -f l2fwd*deb + +install: + sudo mkdir /lib/modules/`uname -r`/kernel/net/core + sudo cp *.ko /lib/modules/`uname -r`/kernel/net/core + +uninstall: + sudo rm /lib/modules/`uname -r`/kernel/net/core/l2fwd.ko + +debian-package: all + ./gen_debian_package.sh diff --git a/src/l2fwd/gen_debian_package.sh b/src/l2fwd/gen_debian_package.sh new file mode 100755 index 00000000..88829ce6 --- /dev/null +++ b/src/l2fwd/gen_debian_package.sh @@ -0,0 +1,72 @@ +#!/bin/bash +# Copyright 2015 Futurewei Inc. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# A copy of the license is included with this distribution. If you did not +# recieve a copy you may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +which dpkg-architecture 2>&1 1>/dev/null +if [ $? -ne 0 ]; then + echo "Can't locate dpkg-architecture" + echo "try 'sudo apt-get install dpkg-dev" + exit 1 +fi +KERNEL_VERSION=${KERNEL_VERSION-`uname -r`} +PACKAGE_NAME=l2fwd +PACKAGE_ARCH=`dpkg-architecture -qDEB_BUILD_ARCH` +GIT_VERSION=`git ls-remote 2>/dev/null | awk '{print $2}' | sed 's/\// /g' | sort -n -k4| awk '/[0-9]+/{print $(NF-1)"-"$NF}' | tail -n -1` +PACKAGE_VERSION="1.0.$GIT_VERSION-${KERNEL_VERSION}" + +MODULE_NAME=l2fwd +PACKAGE_DEPENDS=linux-image-${KERNEL_VERSION} + +rm -rf ${PACKAGE_NAME}-${PACKAGE_VERSION} +mkdir -p ${PACKAGE_NAME}-${PACKAGE_VERSION}/DEBIAN +# put this in with pktgen +mkdir -p ${PACKAGE_NAME}-${PACKAGE_VERSION}/lib/modules/${KERNEL_VERSION}/kernel/net/core/ +cat >>${PACKAGE_NAME}-${PACKAGE_VERSION}/DEBIAN/control <<EOF +Package: ${PACKAGE_NAME} +Version: ${PACKAGE_VERSION} +Section: kernel +Priority: optional +Architecture: ${PACKAGE_ARCH} +Maintainer: eugene.snider@huawei.com +Depends: ${PACKAGE_DEPENDS} +Description: simple l2 fowarding driver + This package provides the l2fwd driver +EOF +cat >>${PACKAGE_NAME}-${PACKAGE_VERSION}/DEBIAN/preinst <<EOF +#!/bin/bash +rmmod ${MODULE_NAME} +if [ upgrade != "$1" ] || dpkg --compare-versions "$2" lt ${PACKAGE_VERSION}; then + dpkg-divert --package ${PACKAGE_NAME} --add --rename \ + --divert /lib/modules/${KERNEL_VERSION}/kernel/net/core/${MODULE_NAME}.ko.dist /lib/modules/${KERNEL_VERSION}/kernel/net/core/${MODULE_NAME}.ko +fi +EOF +chmod 555 ${PACKAGE_NAME}-${PACKAGE_VERSION}/DEBIAN/preinst +cat >>${PACKAGE_NAME}-${PACKAGE_VERSION}/DEBIAN/postinst <<EOF +#!/bin/bash +/sbin/depmod -a `uname -r` +EOF +chmod 555 ${PACKAGE_NAME}-${PACKAGE_VERSION}/DEBIAN/postinst +cat >>${PACKAGE_NAME}-${PACKAGE_VERSION}/DEBIAN/postrm <<EOF +#!/bin/bash +rmmod ${MODULE_NAME} +if [ upgrade != "$1" ] || dpkg --compare-versions "$2" lt ${PACKAGE_VERSION}; then + dpkg-divert --package ${PACKAGE_NAME} --remove --rename \ + --divert /lib/modules/${KERNEL_VERSION}/kernel/net/core/${MODULE_NAME}.ko.dist /lib/modules/${KERNEL_VERSION}/kernel/net/core/${MODULE_NAME}.ko +fi +EOF +chmod 555 ${PACKAGE_NAME}-${PACKAGE_VERSION}/DEBIAN/postrm +cp -p ${MODULE_NAME}.ko ${PACKAGE_NAME}-${PACKAGE_VERSION}/lib/modules/${KERNEL_VERSION}/kernel/net/core/${MODULE_NAME}.ko +sudo dpkg-deb --build ${PACKAGE_NAME}-${PACKAGE_VERSION} +sudo rm -rf ${PACKAGE_NAME}-${PACKAGE_VERSION} diff --git a/src/l2fwd/l2fwd.c b/src/l2fwd/l2fwd.c new file mode 100644 index 00000000..9f2ec314 --- /dev/null +++ b/src/l2fwd/l2fwd.c @@ -0,0 +1,167 @@ +/* +* Copyright 2015 Futurewei Inc. +* +* l2fwd is free software: you can redistribute it and/or modify +* it under the terms of version 2 the GNU General Public License as published +* by the Free Software Foundation only + +* l2fwd is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. + +* You should have received a copy of the GNU General Public License +* along with this code. If not, see +* https://www.gnu.org/licenses/gpl-2.0.html +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, +* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* See the License for the specific language governing permissions and +* limitations under the License. +*/ + + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/aer.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/if.h> +#include <linux/if_ether.h> +#include <linux/in.h> +#include <linux/rtnetlink.h> +#include <linux/prefetch.h> +#include <linux/log2.h> + +static char *net1 = "eth1"; +module_param(net1, charp, 0); +MODULE_PARM_DESC(net1, "The first net device name (default is eth1)"); + +static char *net2 = "eth2"; +module_param(net2, charp, 0); +MODULE_PARM_DESC(net2, "The second net device name (default is eth2)"); + +static bool print = false; +module_param(print, bool, 0); +MODULE_PARM_DESC(print, "Log forwarding statistics (default is false)"); + +static int stats_interval = 10000; +module_param(stats_interval, int, 0); +MODULE_PARM_DESC(print, "Forwarding statistics packet interval (default is 10000)"); + +static bool terminate = false; +module_param(terminate, bool, 0); +MODULE_PARM_DESC(terminate, "Free skb instead of forwarding"); + +static struct net_device *dev1, *dev2; +int count; + +static rx_handler_result_t netdev_frame_hook(struct sk_buff **pskb) +{ + struct sk_buff *skb = *pskb; + struct net_device *dev; + + if (unlikely(skb->pkt_type == PACKET_LOOPBACK)) + return RX_HANDLER_PASS; + + dev = (struct net_device*) rcu_dereference_rtnl(skb->dev->rx_handler_data); + count++; + if ( ((count % stats_interval) == 0) && print ) + printk("l2fwd count %d\n", count); + + if (terminate) + { + kfree_skb(skb); + } + else + { + skb->dev = dev; + skb_push(skb, ETH_HLEN); + dev_queue_xmit(skb); + } + + return RX_HANDLER_CONSUMED; +} + +static int __init l2fwd_init_module(void) +{ + int err = -1; + + dev1 = dev_get_by_name(&init_net, net1); + if (!dev1) + { + printk("can't get device %s\n", net1); + err = -ENODEV; + goto out; + } + + dev2 = dev_get_by_name(&init_net, net2); + if (!dev2) + { + printk("can't get device %s\n", net2); + err = -ENODEV; + goto out_dev1; + } + + rtnl_lock(); + err = netdev_rx_handler_register(dev1, netdev_frame_hook, dev2); + if (err) + { + printk("can't register rx_handler for device %s\n", net1); + goto out_dev2; + } + dev_set_promiscuity(dev1, 1); + + err = netdev_rx_handler_register(dev2, netdev_frame_hook, dev1); + if (err) + { + printk("can't register rx_handler for device %s\n", net2); + netdev_rx_handler_unregister(dev1); + goto out_dev2; + } + dev_set_promiscuity(dev2, 1); + + rtnl_unlock(); + return 0; + +out_dev2: + rtnl_unlock(); + dev_put(dev2); + dev2 = NULL; +out_dev1: + dev_put(dev1); + dev1 = NULL; +out: + return err; +} + +static void __exit l2fwd_exit_module(void) +{ + rtnl_lock(); + if (dev2) + { + dev_put(dev2); + netdev_rx_handler_unregister(dev1); + } + if (dev1) + { + dev_put(dev1); + netdev_rx_handler_unregister(dev2); + } + dev_set_promiscuity(dev1, -1); + dev_set_promiscuity(dev2, -1); + rtnl_unlock(); +} + +module_init(l2fwd_init_module); +module_exit(l2fwd_exit_module); + +MODULE_DESCRIPTION("Huawei L2 Forwarding module"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("0.1"); |