All of lore.kernel.org
 help / color / mirror / Atom feed
From: Roman Kagan <rvkagan@yandex-team.ru>
To: qemu-devel@nongnu.org
Cc: "Kevin Wolf" <kwolf@redhat.com>,
	qemu-block@nongnu.org, "Michael S. Tsirkin" <mst@redhat.com>,
	"Raphael Norwitz" <raphael.norwitz@nutanix.com>,
	"Hanna Reitz" <hreitz@redhat.com>,
	yc-core@yandex-team.ru,
	"Marc-André Lureau" <marcandre.lureau@redhat.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>
Subject: [PATCH 01/10] vhost-user-blk: reconnect on any error during realize
Date: Thu, 11 Nov 2021 18:33:45 +0300	[thread overview]
Message-ID: <20211111153354.18807-2-rvkagan@yandex-team.ru> (raw)
In-Reply-To: <20211111153354.18807-1-rvkagan@yandex-team.ru>

vhost-user-blk realize only attempts to reconnect if the previous
connection attempt failed on "a problem with the connection and not an
error related to the content (which would fail again the same way in the
next attempt)".

However this distinction is very subtle, and may be inadvertently broken
if the code changes somewhere deep down the stack and a new error gets
propagated up to here.

OTOH now that the number of reconnection attempts is limited it seems
harmless to try reconnecting on any error.

So relax the condition of whether to retry connecting to check for any
error.

This patch amends a527e312b5 "vhost-user-blk: Implement reconnection
during realize".

Signed-off-by: Roman Kagan <rvkagan@yandex-team.ru>
---
 hw/block/vhost-user-blk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c
index ba13cb87e5..f9b17f6813 100644
--- a/hw/block/vhost-user-blk.c
+++ b/hw/block/vhost-user-blk.c
@@ -511,7 +511,7 @@ static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp)
             *errp = NULL;
         }
         ret = vhost_user_blk_realize_connect(s, errp);
-    } while (ret == -EPROTO && retries--);
+    } while (ret < 0 && retries--);
 
     if (ret < 0) {
         goto virtio_err;
-- 
2.33.1



  reply	other threads:[~2021-11-11 15:36 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-11 15:33 [PATCH 00/10] vhost: stick to -errno error return convention Roman Kagan
2021-11-11 15:33 ` Roman Kagan [this message]
2021-11-11 17:52   ` [PATCH 01/10] vhost-user-blk: reconnect on any error during realize Kevin Wolf
2021-11-12  7:39     ` Roman Kagan
2021-11-12 11:37       ` Kevin Wolf
2021-11-12 19:59         ` Roman Kagan
2021-11-29 22:15           ` Raphael Norwitz
2021-11-29 22:17   ` Raphael Norwitz
2021-11-11 15:33 ` [PATCH 02/10] chardev/char-socket: tcp_chr_recv: don't clobber errno Roman Kagan
2021-11-12  8:27   ` Marc-André Lureau
2021-11-11 15:33 ` [PATCH 03/10] chardev/char-socket: tcp_chr_sync_read: " Roman Kagan
2021-11-12  8:28   ` Marc-André Lureau
2021-11-11 15:33 ` [PATCH 04/10] chardev/char-fe: don't allow EAGAIN from blocking read Roman Kagan
2021-11-12  8:24   ` Marc-André Lureau
2021-11-12 19:04     ` Roman Kagan
2021-11-11 15:33 ` [PATCH 05/10] vhost-backend: avoid overflow on memslots_limit Roman Kagan
2021-11-11 17:59   ` Philippe Mathieu-Daudé
2021-11-12  7:46     ` Roman Kagan
2021-11-12  9:56       ` Daniel P. Berrangé
2021-11-12 11:10         ` Roman Kagan
2021-11-11 15:33 ` [PATCH 06/10] vhost-backend: stick to -errno error return convention Roman Kagan
2021-11-11 18:00   ` Philippe Mathieu-Daudé
2021-11-11 15:33 ` [PATCH 07/10] vhost-vdpa: " Roman Kagan
2021-11-11 15:33 ` [PATCH 08/10] vhost-user: " Roman Kagan
2021-11-11 15:33 ` [PATCH 09/10] vhost: " Roman Kagan
2021-11-11 15:33 ` [PATCH 10/10] vhost-user-blk: propagate error return from generic vhost Roman Kagan
2021-11-29 22:37   ` Raphael Norwitz
2021-11-11 20:14 ` [PATCH 00/10] vhost: stick to -errno error return convention Michael S. Tsirkin
2021-11-12  8:04   ` Roman Kagan
2021-11-28 21:47 ` Michael S. Tsirkin
2021-11-29 21:44   ` Roman Kagan
2022-01-06  9:57 ` Michael S. Tsirkin

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=20211111153354.18807-2-rvkagan@yandex-team.ru \
    --to=rvkagan@yandex-team.ru \
    --cc=hreitz@redhat.com \
    --cc=kwolf@redhat.com \
    --cc=marcandre.lureau@redhat.com \
    --cc=mst@redhat.com \
    --cc=pbonzini@redhat.com \
    --cc=qemu-block@nongnu.org \
    --cc=qemu-devel@nongnu.org \
    --cc=raphael.norwitz@nutanix.com \
    --cc=yc-core@yandex-team.ru \
    /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.