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1 | How to Submit Patches for Open vSwitch |
2 | ====================================== | |
3 | ||
d7564331 | 4 | Send changes to Open vSwitch as patches to dev@openvswitch.org. |
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5 | One patch per email, please. More details are included below. |
6 | ||
542cc9bb | 7 | If you are using Git, then `git format-patch` takes care of most of |
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8 | the mechanics described below for you. |
9 | ||
10 | Before You Start | |
11 | ---------------- | |
12 | ||
13 | Before you send patches at all, make sure that each patch makes sense. | |
14 | In particular: | |
15 | ||
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16 | - A given patch should not break anything, even if later |
17 | patches fix the problems that it causes. The source tree | |
18 | should still build and work after each patch is applied. | |
19 | (This enables `git bisect` to work best.) | |
55fa0147 | 20 | |
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21 | - A patch should make one logical change. Don't make |
22 | multiple, logically unconnected changes to disparate | |
23 | subsystems in a single patch. | |
55fa0147 | 24 | |
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25 | - A patch that adds or removes user-visible features should |
26 | also update the appropriate user documentation or manpages. | |
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27 | |
28 | Testing is also important: | |
29 | ||
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30 | - A patch that modifies existing code should be tested with |
31 | `make check` before submission. | |
32 | ||
33 | - A patch that adds or deletes files should also be tested with | |
542cc9bb | 34 | `make distcheck` before submission. |
55fa0147 | 35 | |
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36 | - A patch that modifies Linux kernel code should be at least |
37 | build-tested on various Linux kernel versions before | |
38 | submission. I suggest versions 2.6.32 and whatever | |
39 | the current latest release version is at the time. | |
55fa0147 | 40 | |
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41 | - A patch that modifies the ofproto or vswitchd code should be |
42 | tested in at least simple cases before submission. | |
55fa0147 | 43 | |
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44 | - A patch that modifies xenserver code should be tested on |
45 | XenServer before submission. | |
55fa0147 | 46 | |
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47 | If you are using GitHub, then you may utilize the travis-ci.org CI build |
48 | system by linking your GitHub repository to it. This will run some of | |
49 | the above tests automatically when you push changes to your repository. | |
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50 | See the "Continuous Integration with Travis-CI" in the [INSTALL.md] file |
51 | for details on how to set it up. | |
cccf7e9d | 52 | |
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53 | Email Subject |
54 | ------------- | |
55 | ||
56 | The subject line of your email should be in the following format: | |
542cc9bb | 57 | `[PATCH <n>/<m>] <area>: <summary>` |
55fa0147 | 58 | |
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59 | - `[PATCH <n>/<m>]` indicates that this is the nth of a series |
60 | of m patches. It helps reviewers to read patches in the | |
61 | correct order. You may omit this prefix if you are sending | |
62 | only one patch. | |
55fa0147 | 63 | |
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64 | - `<area>:` indicates the area of the Open vSwitch to which the |
65 | change applies (often the name of a source file or a | |
66 | directory). You may omit it if the change crosses multiple | |
67 | distinct pieces of code. | |
55fa0147 | 68 | |
542cc9bb | 69 | - `<summary>` briefly describes the change. |
55fa0147 | 70 | |
542cc9bb | 71 | The subject, minus the `[PATCH <n>/<m>]` prefix, becomes the first line |
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72 | of the commit's change log message. |
73 | ||
74 | Description | |
75 | ----------- | |
76 | ||
77 | The body of the email should start with a more thorough description of | |
78 | the change. This becomes the body of the commit message, following | |
79 | the subject. There is no need to duplicate the summary given in the | |
80 | subject. | |
81 | ||
82 | Please limit lines in the description to 79 characters in width. | |
83 | ||
84 | The description should include: | |
85 | ||
542cc9bb | 86 | - The rationale for the change. |
55fa0147 | 87 | |
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88 | - Design description and rationale (but this might be better |
89 | added as code comments). | |
55fa0147 | 90 | |
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91 | - Testing that you performed (or testing that should be done |
92 | but you could not for whatever reason). | |
55fa0147 | 93 | |
542cc9bb | 94 | - Tags (see below). |
80eb2acf | 95 | |
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96 | There is no need to describe what the patch actually changed, if the |
97 | reader can see it for himself. | |
98 | ||
99 | If the patch refers to a commit already in the Open vSwitch | |
100 | repository, please include both the commit number and the subject of | |
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101 | the patch, e.g. 'commit 632d136c (vswitch: Remove restriction on |
102 | datapath names.)'. | |
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103 | |
104 | If you, the person sending the patch, did not write the patch | |
105 | yourself, then the very first line of the body should take the form | |
542cc9bb | 106 | `From: <author name> <author email>`, followed by a blank line. This |
55fa0147 | 107 | will automatically cause the named author to be credited with |
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108 | authorship in the repository. |
109 | ||
110 | Tags | |
111 | ---- | |
112 | ||
113 | The description ends with a series of tags, written one to a line as | |
114 | the last paragraph of the email. Each tag indicates some property of | |
115 | the patch in an easily machine-parseable manner. | |
116 | ||
117 | Examples of common tags follow. | |
118 | ||
119 | Signed-off-by: Author Name <author.name@email.address...> | |
120 | ||
121 | Informally, this indicates that Author Name is the author or | |
122 | submitter of a patch and has the authority to submit it under | |
123 | the terms of the license. The formal meaning is to agree to | |
124 | the Developer's Certificate of Origin (see below). | |
125 | ||
126 | If the author and submitter are different, each must sign off. | |
127 | If the patch has more than one author, all must sign off. | |
128 | ||
129 | Signed-off-by: Author Name <author.name@email.address...> | |
130 | Signed-off-by: Submitter Name <submitter.name@email.address...> | |
131 | ||
132 | Co-authored-by: Author Name <author.name@email.address...> | |
133 | ||
134 | Git can only record a single person as the author of a given | |
135 | patch. In the rare event that a patch has multiple authors, | |
136 | one must be given the credit in Git and the others must be | |
137 | credited via Co-authored-by: tags. (All co-authors must also | |
138 | sign off.) | |
139 | ||
140 | Acked-by: Reviewer Name <reviewer.name@email.address...> | |
141 | ||
142 | Reviewers will often give an Acked-by: tag to code of which | |
143 | they approve. It is polite for the submitter to add the tag | |
144 | before posting the next version of the patch or applying the | |
145 | patch to the repository. Quality reviewing is hard work, so | |
146 | this gives a small amount of credit to the reviewer. | |
147 | ||
148 | Not all reviewers give Acked-by: tags when they provide | |
149 | positive reviews. It's customary only to add tags from | |
150 | reviewers who actually provide them explicitly. | |
151 | ||
152 | Tested-by: Tester Name <reviewer.name@email.address...> | |
153 | ||
154 | When someone tests a patch, it is customary to add a | |
155 | Tested-by: tag indicating that. It's rare for a tester to | |
156 | actually provide the tag; usually the patch submitter makes | |
157 | the tag himself in response to an email indicating successful | |
158 | testing results. | |
159 | ||
160 | Reported-by: Reporter Name <reporter.name@email.address...> | |
161 | ||
162 | When a patch fixes a bug reported by some person, please | |
163 | credit the reporter in the commit log in this fashion. Please | |
164 | also add the reporter's name and email address to the list of | |
165 | people who provided helpful bug reports in the AUTHORS file at | |
166 | the top of the source tree. | |
167 | ||
168 | Fairly often, the reporter of a bug also tests the fix. | |
169 | Occasionally one sees a combined "Reported-and-tested-by:" tag | |
170 | used to indicate this. It is also acceptable, and more | |
171 | common, to include both tags separately. | |
172 | ||
173 | (If a bug report is received privately, it might not always be | |
174 | appropriate to publicly credit the reporter. If in doubt, | |
175 | please ask the reporter.) | |
176 | ||
177 | Requested-by: Requester Name <requester.name@email.address...> | |
178 | Suggested-by: Suggester Name <suggester.name@email.address...> | |
179 | ||
180 | When a patch implements a request or a suggestion made by some | |
181 | person, please credit that person in the commit log in this | |
182 | fashion. For a helpful suggestion, please also add the | |
183 | person's name and email address to the list of people who | |
184 | provided suggestions in the AUTHORS file at the top of the | |
185 | source tree. | |
186 | ||
187 | (If a suggestion or a request is received privately, it might | |
188 | not always be appropriate to publicly give credit. If in | |
189 | doubt, please ask.) | |
190 | ||
191 | Reported-at: <URL> | |
192 | ||
193 | If a patch fixes or is otherwise related to a bug reported in | |
194 | a public bug tracker, please include a reference to the bug in | |
195 | the form of a URL to the specific bug, e.g.: | |
196 | ||
197 | Reported-at: https://bugs.debian.org/743635 | |
198 | ||
199 | This is also an appropriate way to refer to bug report emails | |
200 | in public email archives, e.g.: | |
201 | ||
202 | Reported-at: http://openvswitch.org/pipermail/dev/2014-June/040952.html | |
55fa0147 | 203 | |
80eb2acf | 204 | VMware-BZ: #1234567 |
af822017 | 205 | ONF-JIRA: EXT-12345 |
d60a2b53 | 206 | |
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207 | If a patch fixes or is otherwise related to a bug reported in |
208 | a private bug tracker, you may include some tracking ID for | |
209 | the bug for your own reference. Please include some | |
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210 | identifier to make the origin clear, e.g. "VMware-BZ" refers |
211 | to VMware's internal Bugzilla instance and "ONF-JIRA" refers | |
212 | to the Open Networking Foundation's JIRA bug tracker. | |
d60a2b53 | 213 | |
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214 | Bug #1234567. |
215 | Issue: 1234567 | |
d60a2b53 | 216 | |
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217 | These are obsolete forms of VMware-BZ: that can still be seen |
218 | in old change log entries. (They are obsolete because they do | |
219 | not tell the reader what bug tracker is referred to.) | |
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220 | |
221 | Developer's Certificate of Origin | |
222 | --------------------------------- | |
223 | ||
224 | To help track the author of a patch as well as the submission chain, | |
225 | and be clear that the developer has authority to submit a patch for | |
226 | inclusion in openvswitch please sign off your work. The sign off | |
227 | certifies the following: | |
228 | ||
229 | Developer's Certificate of Origin 1.1 | |
230 | ||
231 | By making a contribution to this project, I certify that: | |
232 | ||
233 | (a) The contribution was created in whole or in part by me and I | |
234 | have the right to submit it under the open source license | |
235 | indicated in the file; or | |
236 | ||
237 | (b) The contribution is based upon previous work that, to the best | |
238 | of my knowledge, is covered under an appropriate open source | |
239 | license and I have the right under that license to submit that | |
240 | work with modifications, whether created in whole or in part | |
241 | by me, under the same open source license (unless I am | |
242 | permitted to submit under a different license), as indicated | |
243 | in the file; or | |
244 | ||
245 | (c) The contribution was provided directly to me by some other | |
246 | person who certified (a), (b) or (c) and I have not modified | |
247 | it. | |
248 | ||
249 | (d) I understand and agree that this project and the contribution | |
250 | are public and that a record of the contribution (including all | |
251 | personal information I submit with it, including my sign-off) is | |
252 | maintained indefinitely and may be redistributed consistent with | |
253 | this project or the open source license(s) involved. | |
254 | ||
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255 | Comments |
256 | -------- | |
257 | ||
258 | If you want to include any comments in your email that should not be | |
259 | part of the commit's change log message, put them after the | |
542cc9bb | 260 | description, separated by a line that contains just `---`. It may be |
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261 | helpful to include a diffstat here for changes that touch multiple |
262 | files. | |
263 | ||
264 | Patch | |
265 | ----- | |
266 | ||
566b8c8d | 267 | The patch should be in the body of the email following the description, |
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268 | separated by a blank line. |
269 | ||
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270 | Patches should be in `diff -up` format. We recommend that you use Git |
271 | to produce your patches, in which case you should use the `-M -C` | |
272 | options to `git diff` (or other Git tools) if your patch renames or | |
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273 | copies files. Quilt (http://savannah.nongnu.org/projects/quilt) might |
274 | be useful if you do not want to use Git. | |
275 | ||
276 | Patches should be inline in the email message. Some email clients | |
277 | corrupt white space or wrap lines in patches. There are hints on how | |
278 | to configure many email clients to avoid this problem at: | |
279 | http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob_plain;f=Documentation/email-clients.txt | |
280 | If you cannot convince your email client not to mangle patches, then | |
281 | sending the patch as an attachment is a second choice. | |
282 | ||
283 | Please follow the style used in the code that you are modifying. The | |
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284 | [CodingStyle.md] file describes the coding style used in most of Open |
285 | vSwitch. Use Linux kernel coding style for Linux kernel code. | |
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286 | |
287 | Example | |
288 | ------- | |
289 | ||
542cc9bb | 290 | ``` |
d60a2b53 CW |
291 | From fa29a1c2c17682879e79a21bb0cdd5bbe67fa7c0 Mon Sep 17 00:00:00 2001 |
292 | From: Jesse Gross <jesse@nicira.com> | |
293 | Date: Thu, 8 Dec 2011 13:17:24 -0800 | |
294 | Subject: [PATCH] datapath: Alphabetize include/net/ipv6.h compat header. | |
55fa0147 | 295 | |
d60a2b53 | 296 | Signed-off-by: Jesse Gross <jesse@nicira.com> |
55fa0147 | 297 | --- |
d60a2b53 CW |
298 | datapath/linux/Modules.mk | 2 +- |
299 | 1 files changed, 1 insertions(+), 1 deletions(-) | |
300 | ||
301 | diff --git a/datapath/linux/Modules.mk b/datapath/linux/Modules.mk | |
302 | index fdd952e..f6cb88e 100644 | |
303 | --- a/datapath/linux/Modules.mk | |
304 | +++ b/datapath/linux/Modules.mk | |
305 | @@ -56,11 +56,11 @@ openvswitch_headers += \ | |
306 | linux/compat/include/net/dst.h \ | |
307 | linux/compat/include/net/genetlink.h \ | |
308 | linux/compat/include/net/ip.h \ | |
309 | + linux/compat/include/net/ipv6.h \ | |
310 | linux/compat/include/net/net_namespace.h \ | |
311 | linux/compat/include/net/netlink.h \ | |
312 | linux/compat/include/net/protocol.h \ | |
313 | linux/compat/include/net/route.h \ | |
314 | - linux/compat/include/net/ipv6.h \ | |
315 | linux/compat/genetlink.inc | |
55fa0147 | 316 | |
d60a2b53 | 317 | both_modules += brcompat |
55fa0147 | 318 | -- |
d60a2b53 | 319 | 1.7.7.3 |
542cc9bb | 320 | ``` |
55fa0147 | 321 | |
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322 | [INSTALL.md]:INSTALL.md |
323 | [CodingStyle.md]:CodingStyle.md |