53 lines
2.1 KiB
Diff
53 lines
2.1 KiB
Diff
From 8a08519b748ec41c6f542f4ef9406647269db18c Mon Sep 17 00:00:00 2001
|
|
From: Fam Zheng <famz@redhat.com>
|
|
Date: Fri, 28 Sep 2018 06:09:52 +0100
|
|
Subject: luks: Allow share-rw=on
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
RH-Author: Fam Zheng <famz@redhat.com>
|
|
Message-id: <20180928060952.8616-2-famz@redhat.com>
|
|
Patchwork-id: 82311
|
|
O-Subject: [RHEL8/rhel qemu-kvm PATCH 1/1] luks: Allow share-rw=on
|
|
Bugzilla: 1629701
|
|
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
|
|
RH-Acked-by: John Snow <jsnow@redhat.com>
|
|
RH-Acked-by: Thomas Huth <thuth@redhat.com>
|
|
|
|
Format drivers such as qcow2 don't allow sharing the same image between
|
|
two QEMU instances in order to prevent image corruptions, because of
|
|
metadata cache. LUKS driver don't modify metadata except for when
|
|
creating image, so it is safe to relax the permission. This makes
|
|
share-rw=on property work on virtual devices.
|
|
|
|
Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
|
|
Signed-off-by: Fam Zheng <famz@redhat.com>
|
|
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
|
|
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
|
|
(cherry picked from commit 497da8236ab2663a8108858ba7ea59aac21c5fe6)
|
|
Signed-off-by: Fam Zheng <famz@redhat.com>
|
|
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
|
|
---
|
|
block/crypto.c | 4 +++-
|
|
1 file changed, 3 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/block/crypto.c b/block/crypto.c
|
|
index 146d81c..33ee01b 100644
|
|
--- a/block/crypto.c
|
|
+++ b/block/crypto.c
|
|
@@ -627,7 +627,9 @@ BlockDriver bdrv_crypto_luks = {
|
|
.bdrv_probe = block_crypto_probe_luks,
|
|
.bdrv_open = block_crypto_open_luks,
|
|
.bdrv_close = block_crypto_close,
|
|
- .bdrv_child_perm = bdrv_format_default_perms,
|
|
+ /* This driver doesn't modify LUKS metadata except when creating image.
|
|
+ * Allow share-rw=on as a special case. */
|
|
+ .bdrv_child_perm = bdrv_filter_default_perms,
|
|
.bdrv_co_create = block_crypto_co_create_luks,
|
|
.bdrv_co_create_opts = block_crypto_co_create_opts_luks,
|
|
.bdrv_co_truncate = block_crypto_co_truncate,
|
|
--
|
|
1.8.3.1
|
|
|