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[Qemu-devel] [PATCH v2 00/13] block: Protect block jobs with lock / unlo
From: |
Fam Zheng |
Subject: |
[Qemu-devel] [PATCH v2 00/13] block: Protect block jobs with lock / unlock API |
Date: |
Tue, 2 Jun 2015 11:21:49 +0800 |
v2: Fix typo in commit message. (Eric)
Reorder patches as Paolo suggested.
This is the partial work to introduce bdrv_lock / bdrv_unlock and use them in
block jobs where exclusive access to a BDS is necessary. It address the same
category of problems as [1] with a different API, as the idea proposed by Paolo
and Kevin.
What's implemented in this series is also very close to [1], i.e. pausing
ioeventfd and NBD server, with a notifier list.
[1]: https://lists.gnu.org/archive/html/qemu-block/2015-05/msg00800.html
Thanks,
Fam Zheng (13):
block: Use bdrv_drain to replace uncessary bdrv_drain_all
block: Introduce bdrv_lock and bdrv_unlock API
blockdev: Lock BDS during internal snapshot transaction
blockdev: Lock BDS during external snapshot transaction
blockdev: Lock BDS during drive-backup transaction
blockdev: Lock BDS during blockdev-backup transaction
mirror: Protect source between bdrv_drain and bdrv_swap
block: Add bdrv_add_lock_unlock_notifier
block-backend: Add blk_add_lock_unlock_notifier
virtio-blk: Move complete_request to 'ops' structure
virtio-blk: Don't handle output when backend is locked
virtio-scsi-dataplane: Add backend lock listener
nbd-server: Clear "can_read" when backend is locked
block.c | 11 ++++--
block/block-backend.c | 6 ++++
block/io.c | 31 ++++++++++++++++
block/mirror.c | 18 ++++++++--
block/snapshot.c | 2 +-
blockdev.c | 15 ++++++--
hw/block/dataplane/virtio-blk.c | 36 ++++++++++++++++---
hw/block/virtio-blk.c | 63 +++++++++++++++++++++++++++++++--
hw/scsi/virtio-scsi-dataplane.c | 78 ++++++++++++++++++++++++++++++-----------
hw/scsi/virtio-scsi.c | 3 ++
include/block/block.h | 26 ++++++++++++++
include/block/block_int.h | 3 ++
include/hw/virtio/virtio-blk.h | 17 +++++++--
include/hw/virtio/virtio-scsi.h | 3 ++
include/sysemu/block-backend.h | 1 +
migration/block.c | 2 +-
nbd.c | 21 +++++++++++
17 files changed, 296 insertions(+), 40 deletions(-)
--
2.4.1