From: Alex Bligh <alex@alex.org.uk>
To: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Cc: Alex Bligh <alex@alex.org.uk>, Wouter Verhelst <w@uter.be>,
"nbd-general@lists.sourceforge.net"
<nbd-general@lists.sourceforge.net>,
Kevin Wolf <kwolf@redhat.com>,
"Stefan stefanha@redhat. com" <stefanha@redhat.com>,
John Snow <jsnow@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Pavel Borzenkov <pborzenkov@virtuozzo.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Markus Pargmann <mpa@pengutronix.de>,
"Denis V . Lunev" <den@openvz.org>
Subject: Re: [Qemu-devel] [PATCH] Further tidy-up on block status
Date: Wed, 14 Dec 2016 16:38:50 +0000 [thread overview]
Message-ID: <6D1B30FC-FD7E-474C-A8E3-FD87E7AA1364@alex.org.uk> (raw)
In-Reply-To: <31576d46-c0ed-29b9-71a0-5aca1790799a@virtuozzo.com>
Vladimir,
>> +non-zero number of metadata contexts during negotiation. Servers SHOULD
>> +reply to clients sending `NBD_CMD_BLOCK_STATUS without
>
> backquote
Fixed
>> + If zero queries are sent, then the server MUST return all
>> + the metadata contexts it knows about.
>
> I think that 'all .. it knows about' is too much. What about 'return all available ..'? Anyway 'all ... it knows about' actually equals to 'all ... it wants'. There may be some private, or unrelated contexts, for example..
This was not my wording, but I've changed it anyway to:
If zero queries are sent, then the server MUST return all
the metadata contexts that are available to the client to select
on the given export with `NBD_OPT_SET_META_CONTEXT`.
I think if they are available to select, we should list them. Thanks
also for reminding me to document why I put the export name into the
_LIST_ data (as it is for _SET_).
However, this raises another question. Wouter deliberately made the
query format freeform so that you could e.g. set a context like:
backup:modtime>201612081034
which might (in theory) return a list of blocks which are newer than
the given timestamp. It would clearly be impossible to return all such
contexts. I wonder if we should carve out an exception here.
--
Alex Bligh
next prev parent reply other threads:[~2016-12-14 16:38 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-14 15:08 [Qemu-devel] [PATCH] Further tidy-up on block status Alex Bligh
2016-12-14 16:25 ` Vladimir Sementsov-Ogievskiy
2016-12-14 16:38 ` Alex Bligh [this message]
2016-12-14 17:05 ` Vladimir Sementsov-Ogievskiy
2016-12-14 17:36 ` Alex Bligh
2016-12-14 17:55 ` Vladimir Sementsov-Ogievskiy
2016-12-14 18:13 ` [Qemu-devel] [Nbd] " Wouter Verhelst
2016-12-14 18:18 ` Alex Bligh
2016-12-14 18:49 ` Wouter Verhelst
2016-12-14 19:01 ` Alex Bligh
2016-12-14 20:10 ` Wouter Verhelst
2016-12-26 15:57 ` Vladimir Sementsov-Ogievskiy
2016-12-29 16:08 ` Alex Bligh
2016-12-29 16:35 ` Vladimir Sementsov-Ogievskiy
2016-12-14 18:51 ` Alex Bligh
2016-12-14 20:18 ` Wouter Verhelst
2016-12-15 10:04 ` Alex Bligh
2016-12-15 15:03 ` Wouter Verhelst
2016-12-15 16:32 ` Alex Bligh
2016-12-15 16:49 ` Wouter Verhelst
2016-12-15 17:34 ` Alex Bligh
2016-12-16 15:52 ` Wouter Verhelst
2016-12-16 16:25 ` Alex Bligh
2016-12-17 8:34 ` Wouter Verhelst
2016-12-17 9:41 ` Alex Bligh
2016-12-14 18:17 ` [Qemu-devel] " Alex Bligh
2016-12-26 14:52 ` Vladimir Sementsov-Ogievskiy
2016-12-28 0:18 ` [Qemu-devel] [Nbd] " Wouter Verhelst
2016-12-29 16:04 ` Alex Bligh
2016-12-29 16:28 ` Vladimir Sementsov-Ogievskiy
2016-12-14 16:58 ` [Qemu-devel] " Eric Blake
2016-12-14 17:03 ` Alex Bligh
2016-12-14 17:09 ` [Qemu-devel] [Nbd] " Wouter Verhelst
2016-12-14 17:33 ` Vladimir Sementsov-Ogievskiy
2016-12-14 17:39 ` Alex Bligh
2016-12-14 20:47 ` John Snow
2018-05-03 16:18 ` Eric Blake
2018-05-03 17:26 ` Eric Blake
2018-05-04 6:40 ` Wouter Verhelst
2016-12-27 14:09 ` [Qemu-devel] " Vladimir Sementsov-Ogievskiy
2016-12-27 15:56 ` Eric Blake
2016-12-29 16:14 ` Alex Bligh
2017-01-11 15:31 ` Vladimir Sementsov-Ogievskiy
2017-01-11 19:00 ` Alex Bligh
2017-01-12 7:05 ` Vladimir Sementsov-Ogievskiy
2017-01-12 13:11 ` Alex Bligh
2017-01-13 9:48 ` Vladimir Sementsov-Ogievskiy
2017-01-13 10:29 ` Alex Bligh
2017-01-16 12:26 ` Vladimir Sementsov-Ogievskiy
2017-01-12 11:43 ` Vladimir Sementsov-Ogievskiy
2017-01-12 13:16 ` Alex Bligh
2017-01-20 17:04 ` Vladimir Sementsov-Ogievskiy
2017-01-20 18:00 ` Alex Bligh
2017-01-20 19:35 ` Eric Blake
2017-01-21 12:25 ` [Qemu-devel] [Nbd] " Wouter Verhelst
2018-02-16 12:35 ` Eric Blake
2018-02-16 13:53 ` Vladimir Sementsov-Ogievskiy
2018-02-16 16:10 ` Eric Blake
2018-02-28 13:08 ` Wouter Verhelst
2018-02-28 20:26 ` Eric Blake
2018-02-28 20:29 ` Eric Blake
2018-03-01 9:54 ` Vladimir Sementsov-Ogievskiy
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