[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-block] [RFC 0/3] NBD reconnect
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[Qemu-block] [RFC 0/3] NBD reconnect |
Date: |
Tue, 24 Apr 2018 16:08:18 +0300 |
Hi all.
Here is a draft of NBD reconnect, to negotiate overall design. It is done
through implementing new error action: reconnect.
New action works as follows:
Firstly, not stopping the vm, it tries to bdrv_reconnect several times
with given pause. Then, if we failed to reconnect fallthrough to 'stop'
error action.
My RFC doubts:
1. introducing new .bdrv_reconnect(). Is bdrv_reopen() appropriate for
the feature? I'm not sure, because it is not recursive, and don't
really reopen files..
2. introducing new error action. Anyway, I'll have to add some configuration
parameters (see 03), so, the feature may be just an option to 'stop'
action, rather than separate error action.
Vladimir Sementsov-Ogievskiy (3):
block: add bdrv_reconnect
nbd: add .bdrv_reconnect handler
blk: add 'reconnect' error action
qapi/block-core.json | 4 ++--
include/block/block.h | 2 ++
include/block/block_int.h | 3 +++
block.c | 22 +++++++++++++++++
block/block-backend.c | 48 ++++++++++++++++++++++++++++++++++++-
block/nbd.c | 60 ++++++++++++++++++++++++++++++++++-------------
hw/scsi/scsi-disk.c | 4 +++-
7 files changed, 123 insertions(+), 20 deletions(-)
--
2.11.1
- [Qemu-block] [RFC 0/3] NBD reconnect,
Vladimir Sementsov-Ogievskiy <=