Re: wip-addr-features

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On Tue, May 10, 2016 at 7:34 PM, Junwang Zhao <zhjwpku@xxxxxxxxx> wrote:
> Hi Sage, all,
>
> I run "make check" and got two FAIL, one is unittest_chain_xattr, which I once
> came across, I remeber haomai said this was because the selinux, and the
> other fail is test/test_pidfile.sh, I checkout [1] and run "make && make check",
> got the same result, so I think that's not because my applied patch, maybe
> the master branch got the same problem?

Do you mean backport this PR(https://github.com/ceph/ceph/pull/8290)?

>
> Hope somebody could share some tips.
>
> [1] https://github.com/liewegas/ceph/commit/35f1077c3afd016d54707f9fe4de8c312eb47c67
>
> Cheers,
> Zhao
>
> On Tue, May 10, 2016 at 9:07 AM, Junwang Zhao <zhjwpku@xxxxxxxxx> wrote:
>> Hi Sage,
>>
>> Check this:
>> https://github.com/zhjwpku/ceph/commit/2dddc32eb18c2a065963ae33674cb2c8a9e64dc5
>>
>> The original patch doesn't compile, I add dump and
>> generate_test_instances, now it passed
>> the 'make', I am running the 'make check'.
>>
>> Not sure did I do it right, please give some feedback.
>>
>> Thanks!
>>
>> On Mon, May 9, 2016 at 10:14 PM, Junwang Zhao <zhjwpku@xxxxxxxxx> wrote:
>>> I am working on it, the complie is quite slow, I will ping you tomorrow.
>>>
>>> BR,
>>> Zhao
>>>
>>> On Mon, May 9, 2016 at 8:20 PM, Sage Weil <sweil@xxxxxxxxxx> wrote:
>>>> Hi Junwang,
>>>>
>>>> On Sun, 8 May 2016, Junwang Zhao wrote:
>>>>> This weekend, I read the wip-addr-features patches in your repo and
>>>>> the related wip-addr patches in ceph repo, I understand that my task
>>>>> is to make the required-features-patch work by breaking done the 'wip'
>>>>> into small patches to make the required-features-patch finally work.
>>>>> I got one question, when I applied a small individual patch, how can I
>>>>> know it works, will 'make' tell(from the errors)?
>>>>
>>>> 'make' is the first barrier.  Making sure 'make check' passes would be
>>>> the next step.  You might want to make sure this passes on your machine
>>>> before making any changes, as it can be somewhat sensitive to the
>>>> environment.
>>>>
>>>> Breaking up the current changes into a patch series is a start.  I would
>>>> start with that and check in (ping us in #ceph-devel).  There are also
>>>> still a lot of remaining places where we don't have features yet and the
>>>> code still doesn't compile.  Usually it's a matter of adding arguments to
>>>> a chain of calling functions.  If you're not sure how to proceed check
>>>> with us on IRC.
>>>>
>>>> Thanks!
>>>> sage
>>>>
>>>>>
>>>>> Cheers!
>>>>> Zhao
>>>>>
>>>>> On Thu, May 5, 2016 at 11:41 PM, Sage Weil <sweil@xxxxxxxxxx> wrote:
>>>>> > Hi Zhao,
>>>>> >
>>>>> > We identified wip-addr as a desireable first step to fixing up the
>>>>> > messenger protocol.  It has a bunch of other nice benefits as well, like
>>>>> > being able to support both IPv4 and IPv6 in the same cluster.
>>>>> >
>>>>> > I started rebasing the branch this morning ran into a bunch of non-trivial
>>>>> > questions about how we should structure the entity_addr_t to support both
>>>>> > new address types (ipv4, ipv6, xio, etc.) *and* the a new on-wire
>>>>> > protocol.  But this is actually step 2...
>>>>> >
>>>>> > Step 1 is to just get the feature bits plumbed down to every bit of code
>>>>> > that encodes an entity_addr_t to send over the wire so that we will
>>>>> > know whether to encode using the new or legacy format.  To do that, I
>>>>> > pushed a simplified branch, wip-addr-features, to
>>>>> >
>>>>> >         https://github.com/liewegas/ceph/commits/wip-addr-features
>>>>> >
>>>>> > The are some prelim encoding patches, then a patch that makes
>>>>> > entity_addr_t and entity_inst_t *optionally* accept feature bits.  Let's
>>>>> > call it optional-features-patch.  This compiles cleanly, and allows either
>>>>> > an existing featureless encode
>>>>> >
>>>>> >   entity_addr_t foo;
>>>>> >   ::encode(foo, bl);             // old way we need to eliminate
>>>>> >
>>>>> > or a featured encode
>>>>> >
>>>>> >   entity_addr_t foo;
>>>>> >   ::encode(foo, bl, features);   // what we want
>>>>> >
>>>>> > compile.
>>>>> >
>>>>> > Then there's a patch that makes the old way not compile.  Let's call it
>>>>> > required-features-patch.  This will make the compiler spit out a million
>>>>> > errors for all the call sites that still need to be fixed.
>>>>> >
>>>>> > Finally, there is a 'wip' commit that fixes some but not all call sites.
>>>>> > This commit needs to be broken down into simple, individual changes that
>>>>> > can be tested and reviewed separately.
>>>>> >
>>>>> > The idea is to work with the require-features-patch applied to identify
>>>>> > remaining call sites that need features to encode entity_addr_t.  Create
>>>>> > small, contained patches that fix individual modules, call sites, or add
>>>>> > supporting infrastructure (like the changes that expose features to OSD
>>>>> > cls ops in objclass/*).
>>>>> >
>>>>> > Once there are several of those, remove the require-features-patch, and
>>>>> > make sure the changes are safe and clean and everything still works
>>>>> > properly.  We can merge these as we go to make incremental progress.
>>>>> >
>>>>> > Finally, once *everything* is fixed to pass features to addr encode sites,
>>>>> > the last commit will be the require-features-patch, and we can get it all
>>>>> > in master.
>>>>> >
>>>>> > That will lay the foundation so that we can change the entity_addr_t
>>>>> > encoding to support the new protocols and encoding, the entity_addrvec_t
>>>>> > type, and so on.
>>>>> >
>>>>> > (The plan is to replace most instnaces of entity_addr_t with
>>>>> > entity_addrvec_t--a list of addresses instead of a single one.  And make
>>>>> > entity_addrvec_t encoded with old features spit out the legacy addr with
>>>>> > the legacy entity_addr_t encoding so that old clients can still function.)
>>>>> >
>>>>> > We're all in #ceph-devel on irc.oftc.net--feel free to ask questions there
>>>>> > or on this email thread.  Or we can do another video conf session to go
>>>>> > through it.
>>>>> >
>>>>> > Thanks!
>>>>> > sage
>>>>>
>>>>>
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