* [PATCH] nbd/server: Allow LIST_META_CONTEXT without STRUCTURED_REPLY
@ 2021-09-07 17:35 Eric Blake
2021-09-14 14:19 ` Vladimir Sementsov-Ogievskiy
0 siblings, 1 reply; 3+ messages in thread
From: Eric Blake @ 2021-09-07 17:35 UTC (permalink / raw)
To: qemu-devel; +Cc: vsementsov, qemu-block
The NBD protocol just relaxed the requirements on
NBD_OPT_LIST_META_CONTEXT:
https://github.com/NetworkBlockDevice/nbd/commit/13a4e33a87
Since listing is not stateful (unlike SET_META_CONTEXT), we don't care
if a client asks for meta contexts without first requesting structured
replies. Well-behaved clients will still ask for structured reply
first (if for no other reason than for back-compat to older servers),
but that's no reason to avoid this change.
Signed-off-by: Eric Blake <eblake@redhat.com>
---
nbd/server.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/nbd/server.c b/nbd/server.c
index 1646796a4798..bd635cf8ffd1 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -980,7 +980,7 @@ static int nbd_negotiate_meta_queries(NBDClient *client,
size_t i;
size_t count = 0;
- if (!client->structured_reply) {
+ if (client->opt == NBD_OPT_SET_META_CONTEXT && !client->structured_reply) {
return nbd_opt_invalid(client, errp,
"request option '%s' when structured reply "
"is not negotiated",
--
2.31.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] nbd/server: Allow LIST_META_CONTEXT without STRUCTURED_REPLY
2021-09-07 17:35 [PATCH] nbd/server: Allow LIST_META_CONTEXT without STRUCTURED_REPLY Eric Blake
@ 2021-09-14 14:19 ` Vladimir Sementsov-Ogievskiy
2021-09-24 19:19 ` Eric Blake
0 siblings, 1 reply; 3+ messages in thread
From: Vladimir Sementsov-Ogievskiy @ 2021-09-14 14:19 UTC (permalink / raw)
To: Eric Blake, qemu-devel; +Cc: qemu-block
07.09.2021 20:35, Eric Blake wrote:
> The NBD protocol just relaxed the requirements on
> NBD_OPT_LIST_META_CONTEXT:
>
> https://github.com/NetworkBlockDevice/nbd/commit/13a4e33a87
>
> Since listing is not stateful (unlike SET_META_CONTEXT), we don't care
> if a client asks for meta contexts without first requesting structured
> replies. Well-behaved clients will still ask for structured reply
> first (if for no other reason than for back-compat to older servers),
> but that's no reason to avoid this change.
>
> Signed-off-by: Eric Blake<eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
--
Best regards,
Vladimir
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] nbd/server: Allow LIST_META_CONTEXT without STRUCTURED_REPLY
2021-09-14 14:19 ` Vladimir Sementsov-Ogievskiy
@ 2021-09-24 19:19 ` Eric Blake
0 siblings, 0 replies; 3+ messages in thread
From: Eric Blake @ 2021-09-24 19:19 UTC (permalink / raw)
To: Vladimir Sementsov-Ogievskiy; +Cc: qemu-devel, qemu-block
On Tue, Sep 14, 2021 at 05:19:42PM +0300, Vladimir Sementsov-Ogievskiy wrote:
> 07.09.2021 20:35, Eric Blake wrote:
> > The NBD protocol just relaxed the requirements on
> > NBD_OPT_LIST_META_CONTEXT:
> >
> > https://github.com/NetworkBlockDevice/nbd/commit/13a4e33a87
> >
> > Since listing is not stateful (unlike SET_META_CONTEXT), we don't care
> > if a client asks for meta contexts without first requesting structured
> > replies. Well-behaved clients will still ask for structured reply
> > first (if for no other reason than for back-compat to older servers),
> > but that's no reason to avoid this change.
> >
> > Signed-off-by: Eric Blake<eblake@redhat.com>
>
> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Thanks; queuing this one through my NBD tree.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-09-24 19:29 UTC | newest]
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2021-09-07 17:35 [PATCH] nbd/server: Allow LIST_META_CONTEXT without STRUCTURED_REPLY Eric Blake
2021-09-14 14:19 ` Vladimir Sementsov-Ogievskiy
2021-09-24 19:19 ` Eric Blake
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