All of lore.kernel.org
 help / color / mirror / Atom feed
From: Eric Blake <eblake@redhat.com>
To: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Cc: "nsoffer@redhat.com" <nsoffer@redhat.com>,
	"rjones@redhat.com" <rjones@redhat.com>,
	"jsnow@redhat.com" <jsnow@redhat.com>,
	"qemu-block@nongnu.org" <qemu-block@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH v3 18/19] nbd/client: Work around 3.0 bug for listing meta contexts
Date: Wed, 16 Jan 2019 21:21:32 -0600	[thread overview]
Message-ID: <0bace5ce-8d59-0996-51b8-39d584729acd@redhat.com> (raw)
In-Reply-To: <0aee5c7f-2503-a927-c4ec-48a93b883d43@virtuozzo.com>

[-- Attachment #1: Type: text/plain, Size: 1041 bytes --]

On 1/16/19 9:43 AM, Vladimir Sementsov-Ogievskiy wrote:

>> @@ -839,9 +842,25 @@ static int nbd_list_meta_contexts(QIOChannel *ioc,
>>
>>           ret = nbd_receive_one_meta_context(ioc, NBD_OPT_LIST_META_CONTEXT,
>>                                              &context, NULL, errp);
>> +        if (ret == 0 && seen_any && !seen_qemu) {
>> +            /*
>> +             * Work around qemu 3.0 bug: the server forgot to send
>> +             * "qemu:" replies to 0 queries. If we saw at least one
>> +             * reply (probably base:allocation), but none of them were
> 
> if we are saying about 3.0, it is base:allocation for sure, isn't it?
> 
>> +             * qemu:, then run a more specific query to make sure.

If the server is qemu 3.0, then yes, it is base:allocation. But it could
be some other server that has its own custom return without implementing
base:allocation.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

  reply	other threads:[~2019-01-17  3:21 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-12 17:57 [Qemu-devel] [PATCH v3 00/19] nbd: add qemu-nbd --list Eric Blake
2019-01-12 17:57 ` [Qemu-devel] [PATCH v3 01/19] maint: Allow for EXAMPLES in texi2pod Eric Blake
2019-01-15 17:51   ` Richard W.M. Jones
2019-01-12 17:57 ` [Qemu-devel] [PATCH v3 02/19] qemu-nbd: Enhance man page Eric Blake
2019-01-15 17:53   ` Richard W.M. Jones
2019-01-12 17:57 ` [Qemu-devel] [PATCH v3 03/19] qemu-nbd: Sanity check partition bounds Eric Blake
2019-01-15 16:20   ` Vladimir Sementsov-Ogievskiy
2019-01-15 16:53     ` Eric Blake
2019-01-15 18:00   ` Richard W.M. Jones
2019-01-15 18:08     ` Eric Blake
2019-01-16  7:46   ` Vladimir Sementsov-Ogievskiy
2019-01-12 17:57 ` [Qemu-devel] [PATCH v3 04/19] nbd/server: Hoist length check to qemp_nbd_server_add Eric Blake
2019-01-15  9:44   ` Vladimir Sementsov-Ogievskiy
2019-01-15 15:25     ` Eric Blake
2019-01-15 16:26       ` Vladimir Sementsov-Ogievskiy
2019-01-15 16:58         ` Eric Blake
2019-01-16 18:03           ` Eric Blake
2019-01-16 18:05   ` Eric Blake
2019-01-12 17:57 ` [Qemu-devel] [PATCH v3 05/19] nbd/server: Favor [u]int64_t over off_t Eric Blake
2019-01-15 10:19   ` Vladimir Sementsov-Ogievskiy
2019-01-15 15:33     ` Eric Blake
2019-01-15 15:41       ` Vladimir Sementsov-Ogievskiy
2019-01-16  8:23       ` Vladimir Sementsov-Ogievskiy
2019-01-16 14:23         ` Eric Blake
2019-01-12 17:57 ` [Qemu-devel] [PATCH v3 06/19] qemu-nbd: Avoid strtol open-coding Eric Blake
2019-01-15 12:31   ` Vladimir Sementsov-Ogievskiy
2019-01-15 15:35     ` Eric Blake
2019-01-15 18:09   ` Richard W.M. Jones
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 07/19] nbd/client: Refactor nbd_receive_list() Eric Blake
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 08/19] nbd/client: Move export name into NBDExportInfo Eric Blake
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 09/19] nbd/client: Change signature of nbd_negotiate_simple_meta_context() Eric Blake
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 10/19] nbd/client: Split out nbd_send_one_meta_context() Eric Blake
2019-01-15 13:18   ` Vladimir Sementsov-Ogievskiy
2019-01-15 15:44     ` Eric Blake
2019-01-15 15:52       ` Vladimir Sementsov-Ogievskiy
2019-01-15 15:55         ` Eric Blake
2019-01-15 15:59           ` Vladimir Sementsov-Ogievskiy
2019-01-16 10:40       ` Vladimir Sementsov-Ogievskiy
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 11/19] nbd/client: Split out nbd_receive_one_meta_context() Eric Blake
2019-01-15 15:05   ` Vladimir Sementsov-Ogievskiy
2019-01-15 15:50     ` Eric Blake
2019-01-15 15:53       ` Vladimir Sementsov-Ogievskiy
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 12/19] nbd/client: Refactor return of nbd_receive_negotiate() Eric Blake
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 13/19] nbd/client: Split handshake into two functions Eric Blake
2019-01-15 15:34   ` Vladimir Sementsov-Ogievskiy
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 14/19] nbd/client: Pull out oldstyle size determination Eric Blake
2019-01-15 15:35   ` Vladimir Sementsov-Ogievskiy
2019-01-15 15:45     ` Vladimir Sementsov-Ogievskiy
2019-01-16 19:47     ` Eric Blake
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 15/19] nbd/client: Add nbd_receive_export_list() Eric Blake
2019-01-16 10:15   ` Vladimir Sementsov-Ogievskiy
2019-01-16 14:33     ` Eric Blake
2019-01-16 20:01     ` Eric Blake
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 16/19] nbd/client: Add meta contexts to nbd_receive_export_list() Eric Blake
2019-01-16 10:54   ` Vladimir Sementsov-Ogievskiy
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 17/19] qemu-nbd: Add --list option Eric Blake
2019-01-17 10:05   ` Vladimir Sementsov-Ogievskiy
2019-01-17 16:58     ` Eric Blake
2019-01-17 17:11       ` Vladimir Sementsov-Ogievskiy
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 18/19] nbd/client: Work around 3.0 bug for listing meta contexts Eric Blake
2019-01-16 15:43   ` Vladimir Sementsov-Ogievskiy
2019-01-17  3:21     ` Eric Blake [this message]
2019-01-17  8:07       ` Vladimir Sementsov-Ogievskiy
2019-01-17 14:20         ` Eric Blake
2019-01-12 17:58 ` [Qemu-devel] [PATCH v3 19/19] iotests: Enhance 223, 233 to cover 'qemu-nbd --list' Eric Blake
2019-01-17 13:34   ` Eric Blake
2019-01-14 12:22 ` [Qemu-devel] [PATCH v3 00/19] nbd: add qemu-nbd --list Vladimir Sementsov-Ogievskiy
2019-01-14 16:46   ` Eric Blake
2019-01-17 11:38 ` Vladimir Sementsov-Ogievskiy
2019-01-17 14:20   ` Eric Blake
2019-01-23 12:36 ` no-reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=0bace5ce-8d59-0996-51b8-39d584729acd@redhat.com \
    --to=eblake@redhat.com \
    --cc=jsnow@redhat.com \
    --cc=nsoffer@redhat.com \
    --cc=qemu-block@nongnu.org \
    --cc=qemu-devel@nongnu.org \
    --cc=rjones@redhat.com \
    --cc=vsementsov@virtuozzo.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.