1 2CONTRIBUTING 3============ 4 5INBOUND LICENSE 6--------------- 7 8Contributions are governed by the license that applies to relevant 9specific file or by the license specified in the COPYING file, that 10governs the license of its containing directory and its subdirectories. 11 12Most of the Xen Project code is licensed under GPLv2, but a number of 13directories are primarily licensed under different licenses. 14 15Most notably: 16 - tools/blktap2 : BSD-Modified 17 - tools/libxc : LGPL v2.1 18 - tools/libxl : LGPL v2.1 19 - tools/xl : LGPL v2.1 20 - xen/include/public : MIT license 21 22When creating new components and directories that contain a 23significant amount of files that are licensed under licenses other 24than GPLv2 or the license specified in the COPYING file, please 25create a new COPYING file in that directory containing a copy of the 26license text and a rationale for using a different license. This helps 27ensure that the license of this new component/directory is maintained 28consistently with the original intention. 29 30When importing code from other upstream projects into this repository, 31please create a README.source file in the directory the code is imported 32to, listing the original source of the code. An example can be found at 33m4/README.source 34 35The COMMON COPYRIGHT NOTICES section of this document contains 36sample copyright notices for the most common licenses used within 37this repository. 38 39Developer's Certificate of Origin 40--------------------------------- 41 42All patches to the Xen Project code base must include the line 43"Signed-off-by: your_name <your_email>" at the end of the change 44description. This is required and indicates that you certify the patch 45under the "Developer's Certificate of Origin" which states: 46 47 Developer's Certificate of Origin 1.1 48 49 By making a contribution to this project, I certify that: 50 51 (a) The contribution was created in whole or in part by me and I 52 have the right to submit it under the open source license 53 indicated in the file; or 54 55 (b) The contribution is based upon previous work that, to the best 56 of my knowledge, is covered under an appropriate open source 57 license and I have the right under that license to submit that 58 work with modifications, whether created in whole or in part 59 by me, under the same open source license (unless I am 60 permitted to submit under a different license), as indicated 61 in the file; or 62 63 (c) The contribution was provided directly to me by some other 64 person who certified (a), (b) or (c) and I have not modified 65 it. 66 67 (d) I understand and agree that this project and the contribution 68 are public and that a record of the contribution (including all 69 personal information I submit with it, including my sign-off) is 70 maintained indefinitely and may be redistributed consistent with 71 this project or the open source license(s) involved. 72 73GOVERNANCE AND WORKFLOW 74----------------------- 75 76The following documents provide a general overview of governance and 77contribution guidelines for the Xen Project: 78 - https://xenproject.org/governance.html 79 - https://xenproject.org/help/contribution-guidelines.html 80 81For more information on contributing to this repository, see 82 - CODING_STYLE file in this directory 83 - https://wiki.xenproject.org/wiki/Submitting_Xen_Project_Patches 84 - https://wiki.xenproject.org/wiki/Submitting_Xen_Patches_with_Git 85 - https://wiki.xenproject.org/wiki/Asking_Developer_Questions 86 - https://wiki.xenproject.org/wiki/Category:Developers 87 88 89COMMON COPYRIGHT NOTICES 90======================== 91 92The following section contains sample copyright notice for the most 93common licenses used within the Xen Project that is consistent with the 94projects coding standards. 95 96GPL v2 License 97-------------- 98 99/* 100 * <File name> 101 * 102 * <One line description of the file and what it does> 103 * 104 * Copyright (C) <year> <name of author and/or company> 105 * 106 * This program is free software; you can redistribute it and/or 107 * modify it under the terms and conditions of the GNU General Public 108 * License, version 2, as published by the Free Software Foundation. 109 * 110 * This program is distributed in the hope that it will be useful, 111 * but WITHOUT ANY WARRANTY; without even the implied warranty of 112 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 113 * General Public License for more details. 114 * 115 * You should have received a copy of the GNU General Public 116 * License along with this program; If not, see <http://www.gnu.org/licenses/>. 117 */ 118 119 120LGPL v2.1 License 121----------------- 122 123/* 124 * <File name> 125 * 126 * <One line description of the file and what it does> 127 * 128 * Copyright (C) <year> <name of author and/or company> 129 * 130 * This library is free software; you can redistribute it and/or 131 * modify it under the terms of the GNU Lesser General Public 132 * License, version 2.1, as published by the Free Software Foundation. 133 * 134 * This library is distributed in the hope that it will be useful, 135 * but WITHOUT ANY WARRANTY; without even the implied warranty of 136 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 137 * Lesser General Public License for more details. 138 * 139 * You should have received a copy of the GNU Lesser General Public 140 * License along with this library; If not, see <http://www.gnu.org/licenses/>. 141 */ 142 143BSD-Modified License (also known as BSD-3-Clause) 144------------------------------------------------- 145 146/* 147 * <File name> 148 * 149 * <One line description of the file and what it does> 150 * 151 * Copyright (C) <year> <name of author and/or company> 152 * All rights reserved. 153 * 154 * Redistribution and use in source and binary forms, with or without 155 * modification, are permitted provided that the following conditions 156 * are met: 157 * 158 * 1. Redistributions of source code must retain the above copyright 159 * notice, this list of conditions and the following disclaimer. 160 * 2. Redistributions in binary form must reproduce the above 161 * copyright notice, this list of conditions and the following 162 * disclaimer in the documentation and/or other materials provided 163 * with the distribution. 164 * 3. Neither the name of the copyright holder nor the names of its 165 * contributors may be used to endorse or promote products derived 166 * from this software without specific prior written permission. 167 * 168 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 169 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 170 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 171 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 172 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 173 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 174 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 175 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 176 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 177 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 178 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 179 * OF THE POSSIBILITY OF SUCH DAMAGE. 180 */ 181 182 183MIT License 184----------- 185 186/* 187 * <File name> 188 * 189 * <One line description of the file and what it does> 190 * 191 * Copyright (C) <year> <name of author and/or company> 192 * 193 * Permission is hereby granted, free of charge, to any person 194 * obtaining a copy of this software and associated documentation 195 * files (the "Software"), to deal in the Software without restriction, 196 * including without limitation the rights to use, copy, modify, merge, 197 * publish, distribute, sublicense, and/or sell copies of the Software, 198 * and to permit persons to whom the Software is furnished to do so, 199 * subject to the following conditions: 200 * 201 * The above copyright notice and this permission notice shall be 202 * included in all copies or substantial portions of the Software. 203 * 204 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 205 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 206 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 207 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 208 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 209 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 210 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 211 */ 212 213