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CONTRIBUTING
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CONTRIBUTING
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CONTRIBUTING
============
INBOUND LICENSE
---------------
Contributions are governed by the license that applies to relevant
specific file or by the license specified in the COPYING file, that
governs the license of its containing directory and its subdirectories.
Most of the Xen Project code is licensed under GPLv2, but a number of
directories are primarily licensed under different licenses.
Most notably:
- tools/blktap2 : BSD-Modified
- tools/libxc : LGPL v2.1
- tools/libxl : LGPL v2.1
- tools/xl : LGPL v2.1
- xen/include/public : MIT license
When creating new components and directories that contain a
significant amount of files that are licensed under licenses other
than GPLv2 or the license specified in the COPYING file, please
create a new COPYING file in that directory containing a copy of the
license text and a rationale for using a different license. This helps
ensure that the license of this new component/directory is maintained
consistently with the original intention.
When importing code from other upstream projects into this repository,
please create a README.source file in the directory the code is imported
to, listing the original source of the code. An example can be found at
m4/README.source
The COMMON COPYRIGHT NOTICES section of this document contains
sample copyright notices for the most common licenses used within
this repository.
Developer's Certificate of Origin
---------------------------------
All patches to the Xen Project code base must include the line
"Signed-off-by: your_name <your_email>" at the end of the change
description. This is required and indicates that you certify the patch
under the "Developer's Certificate of Origin" which states:
Developer's Certificate of Origin 1.1
By making a contribution to this project, I certify that:
(a) The contribution was created in whole or in part by me and I
have the right to submit it under the open source license
indicated in the file; or
(b) The contribution is based upon previous work that, to the best
of my knowledge, is covered under an appropriate open source
license and I have the right under that license to submit that
work with modifications, whether created in whole or in part
by me, under the same open source license (unless I am
permitted to submit under a different license), as indicated
in the file; or
(c) The contribution was provided directly to me by some other
person who certified (a), (b) or (c) and I have not modified
it.
(d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
personal information I submit with it, including my sign-off) is
maintained indefinitely and may be redistributed consistent with
this project or the open source license(s) involved.
GOVERNANCE AND WORKFLOW
-----------------------
The following documents provide a general overview of governance and
contribution guidelines for the Xen Project:
- https://xenproject.org/governance.html
- https://xenproject.org/help/contribution-guidelines.html
For more information on contributing to this repository, see
- CODING_STYLE file in this directory
- https://wiki.xenproject.org/wiki/Submitting_Xen_Project_Patches
- https://wiki.xenproject.org/wiki/Submitting_Xen_Patches_with_Git
- https://wiki.xenproject.org/wiki/Asking_Developer_Questions
- https://wiki.xenproject.org/wiki/Category:Developers
COMMON COPYRIGHT NOTICES
========================
The following section contains sample copyright notice for the most
common licenses used within the Xen Project that is consistent with the
projects coding standards.
GPL v2 License
--------------
/*
* <File name>
*
* <One line description of the file and what it does>
*
* Copyright (C) <year> <name of author and/or company>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms and conditions of the GNU General Public
* License, version 2, as published by the Free Software Foundation.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
LGPL v2.1 License
-----------------
/*
* <File name>
*
* <One line description of the file and what it does>
*
* Copyright (C) <year> <name of author and/or company>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License, version 2.1, as published by the Free Software Foundation.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; If not, see <http://www.gnu.org/licenses/>.
*/
BSD-Modified License (also known as BSD-3-Clause)
-------------------------------------------------
/*
* <File name>
*
* <One line description of the file and what it does>
*
* Copyright (C) <year> <name of author and/or company>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
MIT License
-----------
/*
* <File name>
*
* <One line description of the file and what it does>
*
* Copyright (C) <year> <name of author and/or company>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/